US2864104A - Scraper - Google Patents

Description

Dec. 16, 1958 E. J. LE SAGE .SCRAPER Filed Dec. 18, 1956 IN VENTOR EUGENE J. LeSAC-E ATTORNEY 2,854,104 Fatented Dec. 16, 1958 sennr'nn Eugene .lf. lLe Sage, ilfankakee, 111., assignor to Armstrong lurk tCompany, Lancaster, Pa, a corporation of Pennsylvania Application December 18, 1956, Serial No. 629,051

3 Claims. (Cl. 15-93) This invention relates to an adjustable scraper mech anism for use on a mobile vehicle, such as a fork lift truck. The invention is concerned particularly with an adjustable scraper mechanism which will be serviceable for removing tough, heavy deposits on industrial floors, such as in asphalt tile plants where deposits of asphalt, limestone, asbestos, and resin are encountered which cannot be removed readily by hand.

An object of the invention is to provide a scraper mechanism which may be readily adjusted to bring the scraper blade into an efficient scraping position, depending upon the nature of the deposit to be removed and the type of surface upon which it is deposited.

Another object of the invention is to provide a scraper mechanism which may be secured to a conventional fork lift truck in such manner as to utilize the tilting mast and lift mechanisms of the truck to provide the desired adjustment of the position of the scraper blade and to utilize the power of the vehicle for operation of the scraper.

Other objects of the invention will be clear from consideration of the following description of an embodiment of the invention which has been illustrated in the attached drawing, in which:

Figure l is a side elevation showing the scraper mechanism of the present invention mounted upon a conventional fork lift truck, the front portion only of which is shown in the drawing; and

Figure 2 is an enlarged perspective view of the scraper mechanism of Figure 1.

As shown in the drawing, the scraping mechanism is secured to a conventional fork lift truck from which the lifting forks have been removed. As mentioned above, the mast and lift mechanisms of the truck are used to provide the desired adjustment of the position of the scraper blade.

There is shown a mast structure made up of a pair of vertical channel members 2 and 3 connected at the top and bottom by cross frame members 4 and 5. A central supporting column 6 is also provided. The mast structure is carried by a pair of brackets 7, one of which is shown in Figure l. T brackets '7 are pivoted to the frame 8 of the truck by a pivot shaft 9. A hydraulic tilting unit 111 is connected to the mast structure and is effective for tilting the mast structure about a horizontal axis defined by the pivot shaft 9. This portion of the unit is conventional in fork lift trucks and needs no further description.

Mounted on the lower end of the mast structure is a blade frame 11 which may be an angle iron member, as shown in Figure 2, which is bolted to the mast members 2 and 3 by bolts 12 and 13. The blade frame includes a pair of brackets 14 and 15 which may be welded to the member 11, as shown in Figure 2.

A blade support 16 is provided which is pivoted to the blade frame 11. Two pairs of mounting brackets 17 and 18 are welded to the blade support 16 and are adapted to receive the blade frame brackets 14 and 15, respectively, therebetween. A pivot bar 19 passes horizontally through openings provided in the brackets 14, 15, 17, and 18.

A linkage arrangement is provided for pivoting the blade support. It includes a pair of brackets 20 welded to the blade frame 11 and a pair of links 21 which are pivoted to a bracket 22 welded to the blade support 16.

- The pivot may be in the form of a bolt 23 which passes through openings provided in the links 21 and bracket 22. A link 24 is disposed between the pairs of brackets 20 and links 21 and is pivoted by bolts 25 and 26 which pass through openings provided in the various members.

Means for actuating the linkage to pivot the blade support 16 about the pivot 19 includes an elevator which, as shown in Figure 1, may be the conventional lift 27 of the fork lift truck which is slidable vertically in ways provided by the vertical channel members 2 and 3. Preferably, the link 24 is connected to the lift 27 through a spring 28 toprovide for yielding pivotal movement of the blade frame 16 to prevent damage to the unit should an immovable object be encountered during scraping. An arm 29 may be secured to the lift 27, and the crook of the spring 28 may be received within an opening in the arm 29. The other end of the spring 28 may be connected to the link 24 by a yoke 30 pivotally secured to link 24. A crook on the spring 28 may be received through the yoke 30, as shown in Figure 2 p 7 Means are provided for moving the blade support 16 to an inoperative position upon lowering of the lift 27. As shown in Figure 2, this mechanism includes an arm 31 welded to one of the brackets 17 and an arm 32 welded to the blade frame 11. A spring 33 is connected between the arms 31 and 32 and serves to pivot the blade support 16 about axis 19 upon lowering of lift 27.

A removable scraper blade 34 is secured to the blade support 16 by bolts 35 and 36.

In operation of the device, the scraper blade 34 is brought into scraping position by elevation of the lift 27 and tilting of the mast through the hydraulic tilting unit 141. The vehicle is then moved forward, and the scraper removes deposit 37 from the floor. The angle assumed by the blade 34 is adjusted by actuation of the lift 27 and by tilting unit 163 until the most effective scraping action is achieved, depending upon the nature of the accumulated deposit 37 being operated upon and the type of surface upon which it is deposited, such as concrete, steel plates, or other material. When scraping in one area has been completed, the lift 27 may be lowered, and the spring 33 will automatically pivot the blade 34 to an inoperative position, and the vehicle may be freely maneuvered to a new position for further scraping. Upon reactuation of the lift 27, the blade support will be pivoted to bring the blade into position, overcoming the action of the spring 34, and further scraping may be effected.

The unit is readily demountable from the fork lift truck by removal of bolts 12 and 13 and detachment of springs 2-8 and 33. The lifting forks may be remounted upon the mast and the truck will be again ready for its usual service.

I claim:

1. An adjustable scraper mechanism for use on a mobile vehicle comprising a mast, a blade frame secured to the lower end of said mast in a fixed position thereon, a pivotable blade support, pivot means for said blade support pivotally securing said blade support to said blade frame for pivotal movement of said blade support about a substantially horizontal axis, a scraper blade secured to said blade support, a first pivot bracket secured to said blade frame, a second pivot bracket secured to said blade support, a first link pivoted to said first pivot bracket, a second link pivotedto said second pivot bracket, pivot means connecting said first and second links, a lift carried by said mast and slidable in ways provided in said mast for movement in a substantially vertical direction, and means connecting said lift to said first link pivotally securing said blade. support to said blade frame for pivotal movement of said blade support about a substantially horizontal axis, a scraper blade secured to said blade support, a first pivot bracket secured to saidblade frame, a second pivot bracket secured to said blade support, a first link pivoted to said first pivot bracket, a second link pivoted to said second pivot bracket, pivot means connecting said first and second links, a lift carried by saidmast and slidable in ways provided in said mast for movement in a substantially vertical direction, means connecting said lift to said first link for imparting pivotal movement to said blade support about said substantially horizontal axis upon said substantially vertical movement of said lift in an upward direction to move said scraper blade toward the surface to be scraped, and yielding means connected to said blade support and to a relatively fixed portion of said scraper automatically to move said scraper blade away from said surface upon substantially vertical movement of said lift in a downward direction.

3 An adjustable scraper mechanism for use on a mobile vehicle comprising a mast, a blade frame secured to the lower end of said mast in a fixed position thereon, a pivotable blade support, pivot means for said blade support pivotally securing said blade support to said blade frame for pivotal movement of said blade support about a substantially horizontal axis, a scraper blade secured to said blade support, a first pivot bracket secured to said blade frame, a second pivot bracket secured to said blade support, a first link pivoted to said first pivot bracket, a second link pivoted to said second pivot bracket, pivot means connecting said first and second links, a lift carried by said mast and slidable in ways provided in said mast for movement in a substantially vertical direction, and spring means connecting said lift to said first link for imparting pivotal movement to said blade support about said substantially horizontal axis upon said substantially vertical movement of said lift in an upward direction to move said scraper blade toward the surface to be scraped.

References Cited in the file of this patent UNITED STATES PATENTS

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