CA2029523C - Pharmaceutical cabinet locking arrangement - Google Patents
Pharmaceutical cabinet locking arrangementInfo
- Publication number
- CA2029523C CA2029523C CA002029523A CA2029523A CA2029523C CA 2029523 C CA2029523 C CA 2029523C CA 002029523 A CA002029523 A CA 002029523A CA 2029523 A CA2029523 A CA 2029523A CA 2029523 C CA2029523 C CA 2029523C
- Authority
- CA
- Canada
- Prior art keywords
- bins
- locking bar
- cabinet
- locking
- bin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/46—Locks or fastenings for special use for drawers
- E05B65/462—Locks or fastenings for special use for drawers for two or more drawers
- E05B65/467—Locking bars secured in front of the drawers
Abstract
A pharmaceutical cart for retaining a plurality of dispensing bins on shelves is provided with cooperating horizontal and vertical locking bars to provide easy access to each of the individual bins and a simplified locking mechanism which prevents bins from being removed when in a locked position. The cart is equipped with a plurality of cassettes, each having a pair of spaced-apart parallel shelves, and a plurality of dispensing bins disposed side-by-side on the shelves and slidably removable from the front of the cart. The horizontally extending locking bar, which has an elongated cross section, extends frontally to the lower part of bins on the upper shelf and the upper part of bins on the lower shelf. The locking bar is pivotally attached to the walls of the cassette and may be rotated to a horizontal position for removal of individual ones of the bins. The vertical locking bar is hingedly attached to one side of the cart and in its locking position extends in front of the cassettes to prevent their removal and engages the horizontal locking bar of each of the cassettes to prevent their rotation. In this manner, operation of the vertical locking bar to its locked position locks each of the cassettes and each of the bins individually.
Description
2 ~ 2 ~
P~M~C~VTICAL CA}~INET LOCRIN(~ ARRANG1~2ENT
BACKGROUND OF THE INVENTION
Field of the Inventio~
The invention relates to pharmaceutical cabinets and particularly to lockable pharmaceutical cabinets comprising a plurality of medication bins.
Prior Art Lockable pharmaceutical cabinets and carts are widely used in hospitals and other medical care facilities. Keeping pharmaceutical products secure from unauthorized access is a matter of major concern in the medical care facilities, not only to protect against theft and misuse of the pharmaceuticals but also to comply with legal requirements concerning controlled substances. Security of pharmaceutical carts used for delivering and dispensing pharmaceutical substances are of particular concern since the carts are of necessity used in areas where they are within easy reach of patients and other non-medical personnel. It is a general requirement in hospitals and the like that pharmaceutical carts be locked when not attended by an authorized person. It is therefore desirable to provide a cabinet or cart which may be readily locked and unlocked and which provides convenient storage and access for preselected pha~naceuticals to be dispensed.
Pharmaceuticals to be dispensed may be contained within individual dispensing bins to be removed from the pharmaceutical cart or cabinet, one at a time. It is therefore desirable to provide an arrangement in which an individual dispensing bin may be conveniently removed and the remaining bins may be made secure in a convenient manner.
The U.S. Pat. No. 4,616,890 to J. M. Romick (issued October 14, 1986) discloses a medication cart including cassettes of medication bins. Each cassette includes a plurality of stacked drawers slidably cont~ined within a cabinet frame and a plurality of medication bins contained within each of the drawers.
2~2~ 12~
The several drawers of a cassette may be locked by means of a single locking bar internal to the cabinet frame and extending vertically along one side thereof. The locking bar engages each drawer individually and is operable in the vertical direction by means of a key lock.
The U.S. Pat. No. 3,893,740 to W. G. England (issued July 8, 1975) discloses a multiple drawer cabinet having a lockable vertically exten~ing locking bar external to the cabinet and pivotally attached to one edge thereof. The locking bar, in its locked position, extends along the front of several drawers to obstruct opening movement. The U.S. Pat. No. 3,9Q2,603 to J. D.
Wilson (issued September 2, 1975) discloses a similarly positioned drawer retaining bar.
A disadvantage of the arrangement disclosed in the Romick patent is that the bins for containing the substances to be dispensed are contained within drawers.
When such a cart is used for dispensing pharmaceuticals, a drawer containing several bins has to be at least partially withdrawn from the cabinet frame to gain access to any one of the bins. Closing the drawer each time after removal of a bin is inconvenient, but an open drawer detracts from a secure environment. The prior art arrangement does not provide for a secure and convenient access to individual bins and makes no provision for retaining or locking individually removable bins, not con~ine~ within a drawer. Similar disadvantages obtain with respect to other known prior art arrangements.
SU~qMARY OF THE lNV~;N'l'lON
These and other problems of the prior art are overcome in accordance with this invention in a pharmaceutical cabinet having a support shelf and a plurality of slidably removable dispensing bins supported on the shelf in a side-by-side relation, by providing cooperating first and second locking bars exten~ing substantially in mutually perpendicular directions. The first locking bar, which has an elongated cross section is disposed frontally to the bins and is rotatable to a releasing position wherein the longer ~i ~n~ion of the
P~M~C~VTICAL CA}~INET LOCRIN(~ ARRANG1~2ENT
BACKGROUND OF THE INVENTION
Field of the Inventio~
The invention relates to pharmaceutical cabinets and particularly to lockable pharmaceutical cabinets comprising a plurality of medication bins.
Prior Art Lockable pharmaceutical cabinets and carts are widely used in hospitals and other medical care facilities. Keeping pharmaceutical products secure from unauthorized access is a matter of major concern in the medical care facilities, not only to protect against theft and misuse of the pharmaceuticals but also to comply with legal requirements concerning controlled substances. Security of pharmaceutical carts used for delivering and dispensing pharmaceutical substances are of particular concern since the carts are of necessity used in areas where they are within easy reach of patients and other non-medical personnel. It is a general requirement in hospitals and the like that pharmaceutical carts be locked when not attended by an authorized person. It is therefore desirable to provide a cabinet or cart which may be readily locked and unlocked and which provides convenient storage and access for preselected pha~naceuticals to be dispensed.
Pharmaceuticals to be dispensed may be contained within individual dispensing bins to be removed from the pharmaceutical cart or cabinet, one at a time. It is therefore desirable to provide an arrangement in which an individual dispensing bin may be conveniently removed and the remaining bins may be made secure in a convenient manner.
The U.S. Pat. No. 4,616,890 to J. M. Romick (issued October 14, 1986) discloses a medication cart including cassettes of medication bins. Each cassette includes a plurality of stacked drawers slidably cont~ined within a cabinet frame and a plurality of medication bins contained within each of the drawers.
2~2~ 12~
The several drawers of a cassette may be locked by means of a single locking bar internal to the cabinet frame and extending vertically along one side thereof. The locking bar engages each drawer individually and is operable in the vertical direction by means of a key lock.
The U.S. Pat. No. 3,893,740 to W. G. England (issued July 8, 1975) discloses a multiple drawer cabinet having a lockable vertically exten~ing locking bar external to the cabinet and pivotally attached to one edge thereof. The locking bar, in its locked position, extends along the front of several drawers to obstruct opening movement. The U.S. Pat. No. 3,9Q2,603 to J. D.
Wilson (issued September 2, 1975) discloses a similarly positioned drawer retaining bar.
A disadvantage of the arrangement disclosed in the Romick patent is that the bins for containing the substances to be dispensed are contained within drawers.
When such a cart is used for dispensing pharmaceuticals, a drawer containing several bins has to be at least partially withdrawn from the cabinet frame to gain access to any one of the bins. Closing the drawer each time after removal of a bin is inconvenient, but an open drawer detracts from a secure environment. The prior art arrangement does not provide for a secure and convenient access to individual bins and makes no provision for retaining or locking individually removable bins, not con~ine~ within a drawer. Similar disadvantages obtain with respect to other known prior art arrangements.
SU~qMARY OF THE lNV~;N'l'lON
These and other problems of the prior art are overcome in accordance with this invention in a pharmaceutical cabinet having a support shelf and a plurality of slidably removable dispensing bins supported on the shelf in a side-by-side relation, by providing cooperating first and second locking bars exten~ing substantially in mutually perpendicular directions. The first locking bar, which has an elongated cross section is disposed frontally to the bins and is rotatable to a releasing position wherein the longer ~i ~n~ion of the
-3-2~29323 elongated cross section extends parallel to the direction in which the bins are slidably removable ~rom the shelf and rotatable to a locking position wherein the longer dimension extends in a direction perpendicular to the S direction of sliding of the bins for restraining removal thereof. The second locking bar engages the first locking bar to prevent its rotation and to maintain the first locking bar in the locking position.
In one specific embodiment of the invention, a pharmaceutical cabinet comprises a pair of upper and lower spaced-apart substantially parallel shelves each slidably supporting a plurality of bins and the bin locking bar is disposed frontally to a lower portion of bins supported on the upper shelf and an upper portion of bins supported on the lower shelf. When rotated to the locking position, the bin locking bar restrains removal of bins from both of the shelves. In the particular embodiment, the cabinet has vertically ext~n~ing sides with the shelves disposed horizontally in the cabinet and the cabinet locking bar is hingedly attached to one of the vertical sides and can be pivoted to a locking position for engagement with the bin locking bar. The cabinet locking bar is provided with a locking pin engaging the cabinet and a key lock operable to disengage the pin from the cabinet. Advantageously, in an arrangement in accordance with the present invention, a plurality of dispensing bins may be locked in place by pivoting a cabinet bar into the locked position without the need for providing individual locks on the bins or requiring that the bins be contained within a lockable drawer or the like, as taught by the prior art.
Furthermore, in accordance with this invention, the bins may be readily removed by unlocking one of the cooperating locking bars, namely the cabinet locking bar, which will allow for free rotation of the bin locking bar, providing for convenient removal of the bins individually.
The pharmaceutical cabinet in accordance with the invention may be constructed as a segmented side wall 2~2~23 cart provided with wheels for ease of transportation of the bins to desired locations. In one emboA~ ent of the invention, the cabinet is provided with a plurality of vertically stacked cassettes, each comprising a pair of the upper and lower spaced-apart shelves and a bin locking bar for each cassette. ~he cabinet lo~ing bar extends across several of the vertically stacXed cassettes and acts to prevent rotation of the bin locking bar of each of the vertically stacked cassettes.
Furthermore, the cassettes may be slidably inserted in the cabinet and the cabinet locking bar is disposed in front of at least a portion of each of the cassettes to prevent their sliding removal from the cabinet.
Advantageously, in accoxdance with this invention, a single cabinet locking bar disposed frontally to a plurality of vertically stacked cassettes cooperates with horizontally ext~n~i ng bin locking bars of each of the cassettes to prevent removal of the cassettes and each of the individual bins disposed within the cassettes.
In one embodiment of the bins in accordance with this invention, each bin is provided with a front handle comprising a frontal piece and a pair of spaced-apart connecting walls connecting the frontal piece to the bin and each of the side walls is provided with an arcuate upper and lower section having a radius of a dimension sufficient to allow rotation of the bin locking bar disposed frontally to the bins. The bin locking bar, in one emboA; -nt, is provided with a pivot pin offset from the geometric centerline of the bar to provide a gravitational force for urging rotation of the lo~i ng bar to the locking position. Advantageously, loc~ing of the cabinet is made easier when the horizontally ext~n~;ng bin locking bars are in a locking position prior to engagement with the vertically extending cabinet locking bar.
BRIEF DESCRIPTION OF THE DRAWING
The invention is described with reference to the drawing, in which:
2~2~2..?
FIG. 1 is a perspective view of a pharmaceutical cart embodying the principles of the invention, shown in the locked condition;
FIG. 2 is a perspective view of the pharmaceutical cart of FIG. 1, shown in the unlocked condition:
FIG. 3 is an enlarged fragmentary perspective view of the cart of FIGS. 1 and 2, showing greater detail;
FIG. 4 is an exploded view of a key lock locking bar of the cart of FIG. l;
FIG. 5 is a more detailed view of the arrangement for attaching the key lock locking bar;
FIG. 6 is a perspective view of a partially occupied removable cassette of dispensing bins used in the cart of FIG. l;
FIG. 7 is a cross-sectional view along line VII-VII of FIG. 6;
FIG. 8 is a cross-sectional view along line VIII-VIII of FIG. 6;
FIG. 9 is a modified cross-sectional view along line VIII-VIII of FIG. 6 showing a bin in a partially withdrawn position;
FIG. 10 is a cross-sectional view along line X-X of FIG. l;
FIG. 11 is a perspective view of a bin for use in the cart of FIG. l;
FIG. 12 is a cross-sectional view along line XII-XII of FIG. 11; and FIG. 13 is a partial psrspective view of a bin locXing bar used in the cart of FIG. 1.
DETAILED DESCRIPTION
Referring to FIGS. 1 and 2, an illustrative embodiment of the invention comprises a segmented side wall pharmaceutical cabinet 100 having a housing comprising a top surface 101 and a base 102. The cabinet i5 provided with casters 104 and may be used as a pharmaceutical dispensing cart. The cabinet housing 2a2~23 further comprises a base side wall segment 103, middle side wall segments 105 and a top segment 106. It is provided with a plurality of drawers 109 for containing various items and a plurality of pharmaceutical cassettes 107, each containing a plurality of bins 108. Each of the cassettes 107 comprises two rows of bins 108 disposed in a side-by-side relation, and is slidably removable from cabinet 100. Each of the cassettes 107 is further provided with a horizontally extending bin lo~-k;ng bar 116 exten~i ng frontally along a lower portion of an upper row of bins and a upper portion of a lower row of bins.
The bin locking bar has an elongated cross section and is rotatable between a horizontal releasing position allowing for removal of individual ones of the bins 108 and a vertical locking position in which removal of the bins is restrained. A vertically ext~n~;ng cabinet locking bar 110 is hingedly attached to one side of cabinet 100 by means of hinge 111 and is rotatable between a locked position as shown in FIG. 1 and an unlocked position as shown in FIG. 2. When in the locked position, as shown in FIG. 1, cabinet locking bar 110 cooperates with the horizontally ext~n~ing bin locking bars 116 of the individual cassettes 107, to lock each of the individual bins 108 in the cart. When in the locked position, the cabinet locking bar 110 engages each of bin loc~ing bars 116 to prevent their rotation to a releasing position. The vertical locking bar 110 is provided with an upper loc~ing pin 122 ext~n~ing from a top edge of locking bar 110 and engaging an upper part of cabinet 100 and a lower lo~ing pin 123 ext~n~ing from a bottom edge of bar 110 and engaging a lower part of cabinet 100. A
rotatable handle 112 is provided to operate locking pins 122, 123 to the unlocked position for opening vertical bar 110. A key lock 114 prevents rotation of the handle 112 unless operated by a key.
FIG. 3 is an enlarged fragmented view of a top portion of cabinet 100 showing channels 126 for slidably engaging cassettes, such as cassettes 107. FIG. 3 shows two of the bins 108 of the lower of the two cassettes 107 2~29~23 in a partially withdrawn position. With cabinet lock~ng bar 110 in the open position, as shown in FIG. 3, the bin locking bars 116 are allowed to rotate on pivot supports, such as pivot support 128. Withdrawal of any of the bins causes the correspon~ing bin locking bar to be rotated from a vertical orientation to a horizontal orientation, as reflected by the lower of the two bin locking bars 116 shown in FIG. 3. It will be readily apparent that none of the side-by-side bins can be removed when the corresponding bin locking bar is restrained from being rotated to the horizontal orientation by cabinet locking bar 110.
FIG. 4 is an exploded view of cabinet locking bar 110 showing details of the latching mechAn~sm for engaging upper and lower portions of cabinet 100. The cabinet locking bar 110, which comprises a front panel 140 and a back panel 141 is attached to one side of cabinet 100 by means of brackets 142 engaging pins 147 of hinge 111. The latching ?c~Ani~ of FIG. 4 includes upper and lower locki~g pins 122, 123 which engage a disk 144, which in turn engages rotatable handle 112. A latch arm 148 rotatably mounted on latch bracket 145, and provided with a latch tab 149, is urged against disk 144 by means of spring 146. The latching mechAnism is shown in FIG. 4 in the unlocked position. Rotation of disk 144 in the clockwise direction, by means of handle 112, causes upper and lower locking pins 122, 123 to be exten~ed for engagement with cabinet 100. As disk 144 is rotated in the clockwise direction, tab 149, being urged Ag~in~t disk 144 by spring 146, will engage slot 150 in dlsk 144, thereby latching the mechanism in the locked position. A key lock 114 is provided with a lock cam 152 for engaging latch arm 148. As key lock 114 is turned in a clockwise direction, latch arm 148 is rotated to disengAge latch tab 149 from slot 150 and handle 112 may then be rotated in the counterclockwise direction to ~i~eng~ge upper and lower locking pins 122, 123 from housing 100. If thereafter the key lock 114 is rotated in the counterclockwise direction, cam 152 will be 2~2~3 disengaged from latch a~m 148 and spring 146 will act to urge latch tab 149 against disk 144. Consequently, the vertically extending cabinet locking bar 110 may again be locked to the cabinet by rotation of handle 112 and without the need for a key to operate key lock 114. FIG.
5 is a partially broken-away view of lock; ng bar 110 showing engagement of pin 147 with hinge section 111 of cabinet locking bar 110 and attachment of bracket 142 to a vertical side 155 of cart 100.
M G. 6 is a perspective view of one of the cassettes 107 of FIG. 1. The cassette comprises a pair of spaced-apart parallel shelves 201, 203 for supporting bins 108, and a top surface 205. Shelves 201, 203 and top surface 205 are spaced apart by a sufficient distance to acc~ te bins 108 while preventing external access to the top opening of the bins. Shelves 201, 203 and top 205 are supported by means of back corner brackets 212 and front brackets 214. Handles 207 are provided for ease of insertion and removal of the cassettes in the cabinet housing of cart 100. Side rails 202 are provided for engagement with channels 126 (FIG. 3) of cabinet 100.
Front brackets 214 are provided with tabs 210 for pivotally supporting bin locking bar 116 which engages tab 210 by means of pivot pin 211. FIG. 7 is a cross section along line VII-VII of FIG. 6 showing an unoccupied portion of cassette 107 and showing bin locking bar 116 in cross section. FIG. 8 is a cross ssctional view of the cassette 107 along line VIII-VIII
of FIG. 6 providing a view of the right-hand occupied portion of the cassette 107 of FIG. 6. Bin locking bar 116 is shown in cross section and showing its position relative to upper and lower bins 108 when the bins are containe~ within the cassette 107. The bins 108 are each provided with a front handle 220 having side panels provided with upper and lower arcuate sections 221 and 223, respectively. The arcuate sections are provided to acs~ -d~te the rotational mov -nt of bin locki ng bar 116 while at the same time restricting forward travel of bins when bar 116 is locked in the vertical locki ng 2~2~23 position. Even though th~ arcuate sections are not necessary for the upper edge of the upper one of the trays 108 or the lower edge o~ the lower one of the trays 108, the handles of all of the trays are made identical to facilitate interchangeability of the trays. The rotatable bln locki ng bar 116, shown in perspective view in FIG. 13, is provided with a pivot pin 211 which is offset from the geometric centerline 232 of bar 116 in order to provide a gravitational force urging bar 116 to the essentially vertical position as depicted in FIG. 8.
The amount sf offset is a matter of design choice and will be selected to obtain the desired effect of having bar 116 automatically return to the vertical position.
This facilitates locking of the cabinet by ~ nt of vertically ext~nding cabinet locking bar 110 to its locking position. FIG. g is a cross-sectional view of the cassette 107 of FIG. 6 along line VIII-VIII except that one of the trays 108 is shown partially withdrawn from cassette 107. Bin locking bar 116 is shown in cross section in FIG. 9 and in a more nearly horizontal position to allow withdrawal of the lower one of the bins 108. The arrow in FIG. 9 indicates a rotation of bar 116 in the counterclockwise direction by engagement of arcuate section 221 of the lower bin 108, when the bin is withdrawn.
FIG. 10 is a partial sectional view of cabinet 110 along line X-X of FIG. 1. FIG. 10 shows the vertically exten~ing cabinet locking bar 110 in its locking position with upper pin 122 engaging a structural member 230 of cabinet 100. Bin locking bar 116 is shown in cross section in the vertical or locking position. As will be apparent from the drawing, any attempt to remove one of the bins 108 from the cabinet housing 100, which requires rotation of bin locking bar 116 to the position indicated generally in FIG. 9, will be prevented by engagement of bin locking bar 116 with cabinet locXing bar 110. Cabinet locking bar 110 similarly engages bin locki ng bars 116 of other cassettes 117 in cabinet 100, and in this manner cooperates with a plurality of bin 2~29~23 locking bars 116 to prevent removal of any of the bins from any position within the cabinet. As i8 evident from the drawing, cabinet locking bar 110, when in its lock~n~
position, obstructs withdrawal of an entire cassette 107 as well as preventing withdrawal of the individual bins.
Referring to FIG. 11 and FIG. 12, which is a cross-sectional view along line XII-XII of FIG. 11, there is shown one of the bins 108 provided with a plurality of vertically exten~ing slots 235 for receiving divider plates for providing a number of compartments within bin 108. External ribs 236 are provided at positions corresponding to slots 235. Handle 220 comprises frontal wall 225 and a pair of side walls 222 exten~ing in a direction substantially perpendicular to frontal wall 225. A spatial area 226 is defined by the two side walls 222, handle frontal wall 225 and frontal wall 224 of bin 108. The spatial area conveniently allows for a hand-grab of the handle 220 either from above or below frontal wall 225. Side walls 222 are each provided with top and bottom arcuate sections 221 and 223, respectively, as described earlier with respect to FIG. 8. Because the axes of rotation of bin locking bar 116 is offset from the ge~ -~,ic axis (FIG. 13), the space required for rotation of bar 116, as outlined by lower arcuate section 223 is smaller than the space required for rotation in the area of upper arcuate section 221. Accordingly, the arcuate sections may be ~i -ncioned differently to accommodate rotation of bar 116.
While the invention has been described with particular reference to the vertically exten~; ng cabinet locking bar 110, it will be understood that other blocki ng members which extend vertically and frontally relative to the cassettes 107 and the bins 108 may be employed. Such bloc-ki ng members can be disposed relative to the bin lock; ng bars 116 to prevent the rotation of the bars between the locking and releasing positions.
For example, the loçk; ng bar 110 can be in the form of a strap, bar, or other relatively rigid member which is 2 ~ 2 ~, secured to the top surface 101 and/or the base 102 of the cabinet 100, and which extends frontally relative to the cassettes 107 and the bins 108. Such a locking member is selectively positionable to either block rotation of the bin locking bars 116 or to allow rotation of the bars as may be desired.
It will be understood that the embodiments described herein are only illustrative of the invention and numerous other embodiments may be devised by those skilled in the art without departing from the spirit and scope of the invention.
In one specific embodiment of the invention, a pharmaceutical cabinet comprises a pair of upper and lower spaced-apart substantially parallel shelves each slidably supporting a plurality of bins and the bin locking bar is disposed frontally to a lower portion of bins supported on the upper shelf and an upper portion of bins supported on the lower shelf. When rotated to the locking position, the bin locking bar restrains removal of bins from both of the shelves. In the particular embodiment, the cabinet has vertically ext~n~ing sides with the shelves disposed horizontally in the cabinet and the cabinet locking bar is hingedly attached to one of the vertical sides and can be pivoted to a locking position for engagement with the bin locking bar. The cabinet locking bar is provided with a locking pin engaging the cabinet and a key lock operable to disengage the pin from the cabinet. Advantageously, in an arrangement in accordance with the present invention, a plurality of dispensing bins may be locked in place by pivoting a cabinet bar into the locked position without the need for providing individual locks on the bins or requiring that the bins be contained within a lockable drawer or the like, as taught by the prior art.
Furthermore, in accordance with this invention, the bins may be readily removed by unlocking one of the cooperating locking bars, namely the cabinet locking bar, which will allow for free rotation of the bin locking bar, providing for convenient removal of the bins individually.
The pharmaceutical cabinet in accordance with the invention may be constructed as a segmented side wall 2~2~23 cart provided with wheels for ease of transportation of the bins to desired locations. In one emboA~ ent of the invention, the cabinet is provided with a plurality of vertically stacked cassettes, each comprising a pair of the upper and lower spaced-apart shelves and a bin locking bar for each cassette. ~he cabinet lo~ing bar extends across several of the vertically stacXed cassettes and acts to prevent rotation of the bin locking bar of each of the vertically stacked cassettes.
Furthermore, the cassettes may be slidably inserted in the cabinet and the cabinet locking bar is disposed in front of at least a portion of each of the cassettes to prevent their sliding removal from the cabinet.
Advantageously, in accoxdance with this invention, a single cabinet locking bar disposed frontally to a plurality of vertically stacked cassettes cooperates with horizontally ext~n~i ng bin locking bars of each of the cassettes to prevent removal of the cassettes and each of the individual bins disposed within the cassettes.
In one embodiment of the bins in accordance with this invention, each bin is provided with a front handle comprising a frontal piece and a pair of spaced-apart connecting walls connecting the frontal piece to the bin and each of the side walls is provided with an arcuate upper and lower section having a radius of a dimension sufficient to allow rotation of the bin locking bar disposed frontally to the bins. The bin locking bar, in one emboA; -nt, is provided with a pivot pin offset from the geometric centerline of the bar to provide a gravitational force for urging rotation of the lo~i ng bar to the locking position. Advantageously, loc~ing of the cabinet is made easier when the horizontally ext~n~;ng bin locking bars are in a locking position prior to engagement with the vertically extending cabinet locking bar.
BRIEF DESCRIPTION OF THE DRAWING
The invention is described with reference to the drawing, in which:
2~2~2..?
FIG. 1 is a perspective view of a pharmaceutical cart embodying the principles of the invention, shown in the locked condition;
FIG. 2 is a perspective view of the pharmaceutical cart of FIG. 1, shown in the unlocked condition:
FIG. 3 is an enlarged fragmentary perspective view of the cart of FIGS. 1 and 2, showing greater detail;
FIG. 4 is an exploded view of a key lock locking bar of the cart of FIG. l;
FIG. 5 is a more detailed view of the arrangement for attaching the key lock locking bar;
FIG. 6 is a perspective view of a partially occupied removable cassette of dispensing bins used in the cart of FIG. l;
FIG. 7 is a cross-sectional view along line VII-VII of FIG. 6;
FIG. 8 is a cross-sectional view along line VIII-VIII of FIG. 6;
FIG. 9 is a modified cross-sectional view along line VIII-VIII of FIG. 6 showing a bin in a partially withdrawn position;
FIG. 10 is a cross-sectional view along line X-X of FIG. l;
FIG. 11 is a perspective view of a bin for use in the cart of FIG. l;
FIG. 12 is a cross-sectional view along line XII-XII of FIG. 11; and FIG. 13 is a partial psrspective view of a bin locXing bar used in the cart of FIG. 1.
DETAILED DESCRIPTION
Referring to FIGS. 1 and 2, an illustrative embodiment of the invention comprises a segmented side wall pharmaceutical cabinet 100 having a housing comprising a top surface 101 and a base 102. The cabinet i5 provided with casters 104 and may be used as a pharmaceutical dispensing cart. The cabinet housing 2a2~23 further comprises a base side wall segment 103, middle side wall segments 105 and a top segment 106. It is provided with a plurality of drawers 109 for containing various items and a plurality of pharmaceutical cassettes 107, each containing a plurality of bins 108. Each of the cassettes 107 comprises two rows of bins 108 disposed in a side-by-side relation, and is slidably removable from cabinet 100. Each of the cassettes 107 is further provided with a horizontally extending bin lo~-k;ng bar 116 exten~i ng frontally along a lower portion of an upper row of bins and a upper portion of a lower row of bins.
The bin locking bar has an elongated cross section and is rotatable between a horizontal releasing position allowing for removal of individual ones of the bins 108 and a vertical locking position in which removal of the bins is restrained. A vertically ext~n~;ng cabinet locking bar 110 is hingedly attached to one side of cabinet 100 by means of hinge 111 and is rotatable between a locked position as shown in FIG. 1 and an unlocked position as shown in FIG. 2. When in the locked position, as shown in FIG. 1, cabinet locking bar 110 cooperates with the horizontally ext~n~ing bin locking bars 116 of the individual cassettes 107, to lock each of the individual bins 108 in the cart. When in the locked position, the cabinet locking bar 110 engages each of bin loc~ing bars 116 to prevent their rotation to a releasing position. The vertical locking bar 110 is provided with an upper loc~ing pin 122 ext~n~ing from a top edge of locking bar 110 and engaging an upper part of cabinet 100 and a lower lo~ing pin 123 ext~n~ing from a bottom edge of bar 110 and engaging a lower part of cabinet 100. A
rotatable handle 112 is provided to operate locking pins 122, 123 to the unlocked position for opening vertical bar 110. A key lock 114 prevents rotation of the handle 112 unless operated by a key.
FIG. 3 is an enlarged fragmented view of a top portion of cabinet 100 showing channels 126 for slidably engaging cassettes, such as cassettes 107. FIG. 3 shows two of the bins 108 of the lower of the two cassettes 107 2~29~23 in a partially withdrawn position. With cabinet lock~ng bar 110 in the open position, as shown in FIG. 3, the bin locking bars 116 are allowed to rotate on pivot supports, such as pivot support 128. Withdrawal of any of the bins causes the correspon~ing bin locking bar to be rotated from a vertical orientation to a horizontal orientation, as reflected by the lower of the two bin locking bars 116 shown in FIG. 3. It will be readily apparent that none of the side-by-side bins can be removed when the corresponding bin locking bar is restrained from being rotated to the horizontal orientation by cabinet locking bar 110.
FIG. 4 is an exploded view of cabinet locking bar 110 showing details of the latching mechAn~sm for engaging upper and lower portions of cabinet 100. The cabinet locking bar 110, which comprises a front panel 140 and a back panel 141 is attached to one side of cabinet 100 by means of brackets 142 engaging pins 147 of hinge 111. The latching ?c~Ani~ of FIG. 4 includes upper and lower locki~g pins 122, 123 which engage a disk 144, which in turn engages rotatable handle 112. A latch arm 148 rotatably mounted on latch bracket 145, and provided with a latch tab 149, is urged against disk 144 by means of spring 146. The latching mechAnism is shown in FIG. 4 in the unlocked position. Rotation of disk 144 in the clockwise direction, by means of handle 112, causes upper and lower locking pins 122, 123 to be exten~ed for engagement with cabinet 100. As disk 144 is rotated in the clockwise direction, tab 149, being urged Ag~in~t disk 144 by spring 146, will engage slot 150 in dlsk 144, thereby latching the mechanism in the locked position. A key lock 114 is provided with a lock cam 152 for engaging latch arm 148. As key lock 114 is turned in a clockwise direction, latch arm 148 is rotated to disengAge latch tab 149 from slot 150 and handle 112 may then be rotated in the counterclockwise direction to ~i~eng~ge upper and lower locking pins 122, 123 from housing 100. If thereafter the key lock 114 is rotated in the counterclockwise direction, cam 152 will be 2~2~3 disengaged from latch a~m 148 and spring 146 will act to urge latch tab 149 against disk 144. Consequently, the vertically extending cabinet locking bar 110 may again be locked to the cabinet by rotation of handle 112 and without the need for a key to operate key lock 114. FIG.
5 is a partially broken-away view of lock; ng bar 110 showing engagement of pin 147 with hinge section 111 of cabinet locking bar 110 and attachment of bracket 142 to a vertical side 155 of cart 100.
M G. 6 is a perspective view of one of the cassettes 107 of FIG. 1. The cassette comprises a pair of spaced-apart parallel shelves 201, 203 for supporting bins 108, and a top surface 205. Shelves 201, 203 and top surface 205 are spaced apart by a sufficient distance to acc~ te bins 108 while preventing external access to the top opening of the bins. Shelves 201, 203 and top 205 are supported by means of back corner brackets 212 and front brackets 214. Handles 207 are provided for ease of insertion and removal of the cassettes in the cabinet housing of cart 100. Side rails 202 are provided for engagement with channels 126 (FIG. 3) of cabinet 100.
Front brackets 214 are provided with tabs 210 for pivotally supporting bin locking bar 116 which engages tab 210 by means of pivot pin 211. FIG. 7 is a cross section along line VII-VII of FIG. 6 showing an unoccupied portion of cassette 107 and showing bin locking bar 116 in cross section. FIG. 8 is a cross ssctional view of the cassette 107 along line VIII-VIII
of FIG. 6 providing a view of the right-hand occupied portion of the cassette 107 of FIG. 6. Bin locking bar 116 is shown in cross section and showing its position relative to upper and lower bins 108 when the bins are containe~ within the cassette 107. The bins 108 are each provided with a front handle 220 having side panels provided with upper and lower arcuate sections 221 and 223, respectively. The arcuate sections are provided to acs~ -d~te the rotational mov -nt of bin locki ng bar 116 while at the same time restricting forward travel of bins when bar 116 is locked in the vertical locki ng 2~2~23 position. Even though th~ arcuate sections are not necessary for the upper edge of the upper one of the trays 108 or the lower edge o~ the lower one of the trays 108, the handles of all of the trays are made identical to facilitate interchangeability of the trays. The rotatable bln locki ng bar 116, shown in perspective view in FIG. 13, is provided with a pivot pin 211 which is offset from the geometric centerline 232 of bar 116 in order to provide a gravitational force urging bar 116 to the essentially vertical position as depicted in FIG. 8.
The amount sf offset is a matter of design choice and will be selected to obtain the desired effect of having bar 116 automatically return to the vertical position.
This facilitates locking of the cabinet by ~ nt of vertically ext~nding cabinet locking bar 110 to its locking position. FIG. g is a cross-sectional view of the cassette 107 of FIG. 6 along line VIII-VIII except that one of the trays 108 is shown partially withdrawn from cassette 107. Bin locking bar 116 is shown in cross section in FIG. 9 and in a more nearly horizontal position to allow withdrawal of the lower one of the bins 108. The arrow in FIG. 9 indicates a rotation of bar 116 in the counterclockwise direction by engagement of arcuate section 221 of the lower bin 108, when the bin is withdrawn.
FIG. 10 is a partial sectional view of cabinet 110 along line X-X of FIG. 1. FIG. 10 shows the vertically exten~ing cabinet locking bar 110 in its locking position with upper pin 122 engaging a structural member 230 of cabinet 100. Bin locking bar 116 is shown in cross section in the vertical or locking position. As will be apparent from the drawing, any attempt to remove one of the bins 108 from the cabinet housing 100, which requires rotation of bin locking bar 116 to the position indicated generally in FIG. 9, will be prevented by engagement of bin locking bar 116 with cabinet locXing bar 110. Cabinet locking bar 110 similarly engages bin locki ng bars 116 of other cassettes 117 in cabinet 100, and in this manner cooperates with a plurality of bin 2~29~23 locking bars 116 to prevent removal of any of the bins from any position within the cabinet. As i8 evident from the drawing, cabinet locking bar 110, when in its lock~n~
position, obstructs withdrawal of an entire cassette 107 as well as preventing withdrawal of the individual bins.
Referring to FIG. 11 and FIG. 12, which is a cross-sectional view along line XII-XII of FIG. 11, there is shown one of the bins 108 provided with a plurality of vertically exten~ing slots 235 for receiving divider plates for providing a number of compartments within bin 108. External ribs 236 are provided at positions corresponding to slots 235. Handle 220 comprises frontal wall 225 and a pair of side walls 222 exten~ing in a direction substantially perpendicular to frontal wall 225. A spatial area 226 is defined by the two side walls 222, handle frontal wall 225 and frontal wall 224 of bin 108. The spatial area conveniently allows for a hand-grab of the handle 220 either from above or below frontal wall 225. Side walls 222 are each provided with top and bottom arcuate sections 221 and 223, respectively, as described earlier with respect to FIG. 8. Because the axes of rotation of bin locking bar 116 is offset from the ge~ -~,ic axis (FIG. 13), the space required for rotation of bar 116, as outlined by lower arcuate section 223 is smaller than the space required for rotation in the area of upper arcuate section 221. Accordingly, the arcuate sections may be ~i -ncioned differently to accommodate rotation of bar 116.
While the invention has been described with particular reference to the vertically exten~; ng cabinet locking bar 110, it will be understood that other blocki ng members which extend vertically and frontally relative to the cassettes 107 and the bins 108 may be employed. Such bloc-ki ng members can be disposed relative to the bin lock; ng bars 116 to prevent the rotation of the bars between the locking and releasing positions.
For example, the loçk; ng bar 110 can be in the form of a strap, bar, or other relatively rigid member which is 2 ~ 2 ~, secured to the top surface 101 and/or the base 102 of the cabinet 100, and which extends frontally relative to the cassettes 107 and the bins 108. Such a locking member is selectively positionable to either block rotation of the bin locking bars 116 or to allow rotation of the bars as may be desired.
It will be understood that the embodiments described herein are only illustrative of the invention and numerous other embodiments may be devised by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pharmaceutical cabinet comprising:
a housing having a pair of side walls in spaced-apart relationship;
a support shelf mounted between said side walls and having a front edge;
a plurality of dispensing bins supported on said shelf in a side-by-side relation and removable from said shelf by sliding said bins in a direction substantially perpendicular to said front edge; and cooperating bin and cabinet locking bars mounted to said housing and extending substantially in mutually perpendicular directions:
said bin locking bar disposed frontally to said bins and having an elongated cross section and rotatable about an axis of rotation extending in a direction substantially parallel to said front edge to a releasing position wherein a longer dimension of said elongated cross section extends in a direction parallel to said direction of sliding of said bins for allowing sliding removal of said bins, said bin locking bar being further rotatable about said axis to a locking position wherein said longer dimension extends in a direction perpendicular to said direction of sliding of said bins for restraining removal of said bins; and said cabinet locking bar is operable to selectively engage said bin locking bar and to selectively maintain said bin locking bar in said locking position, and to selectively disengage said bin locking bar to permit rotation of said locking bar to the releasing position.
a housing having a pair of side walls in spaced-apart relationship;
a support shelf mounted between said side walls and having a front edge;
a plurality of dispensing bins supported on said shelf in a side-by-side relation and removable from said shelf by sliding said bins in a direction substantially perpendicular to said front edge; and cooperating bin and cabinet locking bars mounted to said housing and extending substantially in mutually perpendicular directions:
said bin locking bar disposed frontally to said bins and having an elongated cross section and rotatable about an axis of rotation extending in a direction substantially parallel to said front edge to a releasing position wherein a longer dimension of said elongated cross section extends in a direction parallel to said direction of sliding of said bins for allowing sliding removal of said bins, said bin locking bar being further rotatable about said axis to a locking position wherein said longer dimension extends in a direction perpendicular to said direction of sliding of said bins for restraining removal of said bins; and said cabinet locking bar is operable to selectively engage said bin locking bar and to selectively maintain said bin locking bar in said locking position, and to selectively disengage said bin locking bar to permit rotation of said locking bar to the releasing position.
2. A pharmaceutical cabinet comprising:
a pair of side walls in spaced-apart relationship;
a pair of upper and lower spaced-apart substantially parallel shelves mounted between and to said side walls, each of said shelves having a front edge;
a plurality of dispensing bins supported on each of said shelves in a side-by-side relation and removable by sliding said bins in a direction substantially perpendicular to said front edge; and a first locking bar mounted to said side walls and disposed frontally to a lower portion of each of said bins supported on said upper shelf and an upper portion of each of said bins supported on said lower shelf and having an elongated cross section, said first locking bar rotatable about an axis of rotation extending in a direction substantially parallel to said front edges to a releasing position wherein a longer dimension of said elongated cross section extends in a direction parallel to said direction of sliding of said bins for allowing sliding removal of bins supported on said upper shelf and on said lower shelf and rotatable about said axis to a locking position wherein said longer dimension extends in a direction perpendicular to said direction of sliding of said bins for restraining removal of said bins supported on said upper shelf and said lower shelf; and means to selectively maintain said first locking bar in said locking position to selectively lock said bins within said side walls.
a pair of side walls in spaced-apart relationship;
a pair of upper and lower spaced-apart substantially parallel shelves mounted between and to said side walls, each of said shelves having a front edge;
a plurality of dispensing bins supported on each of said shelves in a side-by-side relation and removable by sliding said bins in a direction substantially perpendicular to said front edge; and a first locking bar mounted to said side walls and disposed frontally to a lower portion of each of said bins supported on said upper shelf and an upper portion of each of said bins supported on said lower shelf and having an elongated cross section, said first locking bar rotatable about an axis of rotation extending in a direction substantially parallel to said front edges to a releasing position wherein a longer dimension of said elongated cross section extends in a direction parallel to said direction of sliding of said bins for allowing sliding removal of bins supported on said upper shelf and on said lower shelf and rotatable about said axis to a locking position wherein said longer dimension extends in a direction perpendicular to said direction of sliding of said bins for restraining removal of said bins supported on said upper shelf and said lower shelf; and means to selectively maintain said first locking bar in said locking position to selectively lock said bins within said side walls.
3. The cabinet in accordance with claim 2 wherein said means to selectively maintain said first locking bar comprises a second locking bar which is hingedly attached to one of said side walls.
4. The cabinet in accordance with claim 3 and further comprising a top wall and a bottom wall mounted to said side walls and wherein said second locking bar is provided with a locking pin to selectively engage at least one of said top and bottom walls and a lock operable for disengaging said pin from engagement with said top and bottom wall.
5. The cabinet in accordance with claim 4 wherein said cabinet comprises wheels mounted beneath said bottom wall to facilitate movement of said cabinet in dispensing medicine.
6. The cabinet in accordance with claim 2 wherein said first locking bar has a geometric longitudinal centerline and wherein said axis of rotation is offset from said geometric longitudinal centerline to provide a gravitational force on said first locking bar urging rotation of said first locking bar to said locking position.
7. The cabinet in accordance with claim 3 and further comprising a plurality of vertically stacked cassettes, each comprising a pair of said upper and lower spaced-apart substantially parallel shelves and one of said first locking bars, and wherein said second locking bar is operable to engage said first locking bars of each of said plurality of cassettes to maintain said first locking bars in said locking position.
8. The cabinet in accordance with claim 7 wherein said cassettes are horizontally disposed and slidably supported within said cabinet and wherein said second locking bar is pivotally attached to one of said side walls and operable to engage said first locking bars and thereby obstructing sliding movement of said cassettes from said housing.
9. The cabinet in accordance with claim 2 wherein each of said bins comprises a front wall and a front drawing handle, said handle comprising a frontal piece spaced apart from and extending substantially parallel to said front wall and a pair of spaced-apart connecting side walls extending substantially perpendicular to said front wall and connecting said frontal piece to said front wall, said side walls each comprising an arcuate upper and lower section adjacent said front wall, said arcuate sections each having a radius of a dimension sufficient to allow rotation of said first locking bar about said axis of rotation.
10. The cabinet in accordance with claim 9 wherein said arcuate upper and lower sections have radii of differing dimensions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/521,640 US5069511A (en) | 1990-05-10 | 1990-05-10 | Pharmaceutical cabinet locking arrangement |
| US521,640 | 1990-05-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2029523A1 CA2029523A1 (en) | 1991-11-11 |
| CA2029523C true CA2029523C (en) | 1999-06-29 |
Family
ID=24077535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002029523A Expired - Fee Related CA2029523C (en) | 1990-05-10 | 1990-11-08 | Pharmaceutical cabinet locking arrangement |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5069511A (en) |
| EP (1) | EP0455862B1 (en) |
| JP (1) | JPH0417810A (en) |
| CA (1) | CA2029523C (en) |
| DE (1) | DE69015163T2 (en) |
| ES (1) | ES2068306T3 (en) |
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-
1990
- 1990-05-10 US US07/521,640 patent/US5069511A/en not_active Expired - Lifetime
- 1990-10-05 ES ES90119190T patent/ES2068306T3/en not_active Expired - Lifetime
- 1990-10-05 DE DE69015163T patent/DE69015163T2/en not_active Expired - Fee Related
- 1990-10-05 EP EP90119190A patent/EP0455862B1/en not_active Expired - Lifetime
- 1990-11-08 CA CA002029523A patent/CA2029523C/en not_active Expired - Fee Related
- 1990-11-23 JP JP2320511A patent/JPH0417810A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE69015163D1 (en) | 1995-01-26 |
| ES2068306T3 (en) | 1995-04-16 |
| CA2029523A1 (en) | 1991-11-11 |
| DE69015163T2 (en) | 1995-08-03 |
| EP0455862A3 (en) | 1992-05-13 |
| EP0455862A2 (en) | 1991-11-13 |
| EP0455862B1 (en) | 1994-12-14 |
| JPH0417810A (en) | 1992-01-22 |
| US5069511A (en) | 1991-12-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |