CN-120756793-B - Pallet for storage elevator

Abstract

The invention relates to a pallet (1) for a storage lift and to a method for producing a pallet (1). In order to provide a pallet (1) with increased carrying capacity, which is at the same time compact and easy to manufacture, it is proposed according to the invention that the bottom (3) is plastically deformed at least one location (19) spaced apart from the edge areas (12, 14).

Inventors

• Norbert Buch
• Tanishimo Masaaki

Assignees

• 卡迪斯制造（德国）有限公司

Dates

Publication Date

20260508

Application Date

20181121

Priority Date

20171124

Claims (17)

1. 1. A pallet for a storage lift, having a bottom for placing a storage, wherein the bottom is plastically deformable at least one location spaced apart from at least one edge area, wherein in the at least one location of plastic deformation, a sheet-like raw material forming the bottom is pushed laterally, such that the bottom is elongated in a longitudinal direction, causing an arching of the bottom upwards in a vertical direction, because the bottom is prevented from expanding in area in the longitudinal direction and/or in a depth direction, wherein in case there is exactly one arch, the uppermost point of the arch is located in the middle of the pallet.
2. 2. The pallet of claim 1, wherein the base is upwardly arched in an unloaded state.
3. 3. The tray of claim 1, wherein the domed bottom has an upward bias at the at least one site of plastic deformation.
4. 4. The tray of claim 1, wherein the at least one site of plastic deformation is formed by an elongated recess.
5. 5. The tray of claim 4, wherein the tray is elongate and a longitudinal direction of at least one of the elongate recesses extends substantially transverse to the longitudinal direction of the tray.
6. 6. The tray of claim 5, wherein the length of at least one of the elongated recesses is greater than 1/3 of the depth of the tray.
7. 7. The tray of claim 6, wherein a height of at least one offset corresponds at most to a thickness of the bottom.
8. 8. The pallet of claim 1, wherein the pallet is configured as a punched bend.
9. 9. The tray of claim 1, wherein the at least one site that is plastically deformable is integrally constructed with the bottom of the tray.
10. 10. The pallet of claim 1, wherein the pallet is rectangular and comprises edges, wherein the edges of rectangular pallet are reinforced by hemming the sheet stock material.
11. 11. A pallet for a storage lift having a bottom for placement of a storage, wherein the bottom is plastically deformable at least one location spaced from at least one edge region, wherein a reverse pretension in the bottom is created by the at least one plastically deformed location, wherein the region of reverse pretension extends over at least 2/3 of a bottom surface, and wherein the at least one plastically deformed location extends over less than 1/10 of the bottom surface.
12. 12. A method for manufacturing a pallet from plate-shaped raw material by forming, wherein a bottom of the pallet is plastically deformable at least one location spaced apart from at least one edge area, wherein in the at least one location of plastic deformation, the plate-shaped raw material forming the bottom is pushed laterally, such that the bottom is elongated in a longitudinal direction, causing a doming of the bottom in a vertical direction upwards, because the bottom is prevented from expanding area in the longitudinal direction and/or in a depth direction, and in case there is exactly one doming, the uppermost point of the doming is positioned in the middle of the pallet.
13. 13. The method of claim 12, wherein the upwardly directed camber of the bottom is created by the at least one site being plastically deformable.
14. 14. The method of claim 12, wherein at the at least one site of plastic deformation, material of the base is urged away from the at least one site of deformation.
15. 15. The method of claim 12, wherein at least one pushing body is pressed into the bottom from below at the at least one location.
16. 16. The method of claim 12, wherein the at least one location is formed by deep drawing the bottom.
17. 17. The method of claim 12, wherein the sheet stock material is hemmed at least one edge region after the at least one site of plastic deformation is created in the base.

Description

Pallet for storage elevator The application is a divisional application of the application patent application with the application date of 2018, 11, 21, the stage date of entering China, 2020, 5, 22, the application number of 201880075779.X and the name of 'tray for storage lifter'. Technical Field The invention relates to a pallet for a storage lift, which has a bottom for placing stored objects. The invention also relates to a method for manufacturing a pallet from a plate-like raw material. Background Trays for storage lifts are known. They are used for storing goods in storage lifts and are usually accommodated in a removable manner in the storage lifts. There are a number of requirements for pallets. One of these is that they must have sufficient carrying capacity for the storage to be accommodated. Furthermore, it is advantageous if the trays occupy a small installation space, in particular in the vertical direction, i.e. perpendicular to the bottom, so that a plurality of trays can be placed on top of one another in a storage lift of a predetermined size. Disclosure of Invention It is therefore an object of the present invention to provide a pallet for a storage lift and a method of manufacturing such a pallet, which pallet has a high carrying capacity and at the same time a compact structure. Furthermore, it is advantageous that the pallet is simple in construction or can be manufactured with as few manufacturing steps as possible. With a pallet of the aforementioned type, this object is achieved in that the bottom is plastically deformed at least one location spaced apart from the edge area, wherein in the at least one plastically deformed location the sheet-like raw material forming the bottom is pushed laterally such that the bottom is elongated in the longitudinal direction, causing the bottom to arch upwards in the vertical direction, because the bottom is prevented from expanding its area in the longitudinal direction and/or in the depth direction. For the method initially proposed, this object is achieved in that the pallet is manufactured from a plate-shaped raw material, in particular from a sheet material by forming, wherein the bottom of the pallet is plastically deformed at least one point spaced apart from the edge area, wherein in the at least one plastically deformed point the plate-shaped raw material forming the bottom is pushed laterally such that the bottom is elongated in the longitudinal direction, causing the bottom to arch upwards in the vertical direction, because the bottom is prevented from expanding its area in the longitudinal direction and/or in the depth direction. At least one point of plastic deformation can cause stress in the material of the bottom, in particular in the plate-like raw material. This stress in turn can create an upward bottom camber, wherein the upward camber is referenced to a pallet-like structure of at least one location that is not plastically deformed. In other words, the bottom of the tray may sag downward due to its own weight without at least one portion of plastic deformation, while the bottom of the tray may not sag as much or may extend horizontally or arch upward instead of sagging due to at least one portion of plastic deformation. Thus, the introduction of at least one site of plastic deformation generates a negative prestress in the bottom or an upward camber of the bottom, compared to a pallet without at least one site of plastic deformation according to the invention. The indirect arching can be produced in that the material of the base is pushed laterally, i.e. away from the plastically deformable at least one point. This pushing of the material can create a pressure in the bottom of the tray, in particular directed sideways. Because the tray is generally bounded up to its sides and the sides can be reinforced, the bottom can respond to the pressure created by plastic deformation with the formation of arches. By means of the upwardly directed arching of the bottom, the pallet can be reverse pre-deformed or reverse pre-stressed in the unloaded state, i.e. without storage. If the pallet is now unloaded and the load acting on the bottom increases, the bottom arches downwards. The bottom portion bows downward to a lesser extent due to such upward reverse deformation than in a similar tray where the bottom portion does not have a site of plastic deformation according to the present invention. In other words, when the bottom is loaded with the storage object, the upward-directed camber is first overcome before the bottom is downwardly deflected by the weight of the storage object. This minimizes downward-directed bottom camber. Therefore, the bottom of the pallet according to the present invention bows downwardly to a lesser extent under the same load than a pallet without the plastic deformation site according to the present invention. In this way, a plurality of trays can be placed overlapping each other at a small vertical interval in