WO2003045799A1

WO2003045799A1 - Pallet for transportation

Info

Publication number: WO2003045799A1
Application number: PCT/JP2002/003380
Authority: WO
Inventors: Kenji Nakabayashi; Masao Tsuruoka; Noboru Shimizu
Original assignee: Yamahashi Kogyo Co., Ltd.
Priority date: 2001-11-28
Filing date: 2002-04-04
Publication date: 2003-06-05
Also published as: CA2395104A1; MXPA02005316A; AU2002244967A1; CN1455749A; JP3594926B2; US20030189153A1; JP2003165543A

Abstract

A lightweight and rigid pallet for transportation (10) capable of being easily manufactured and assembled/disassembled, comprising (a) upper surface plates (11) formed of metallic band-shaped surface plates in such a cross section that projected parts (11a) of (n+1) in quantity and recessed parts (11b) of (n) in quantity (n is natural number) are arranged alternately each other, (b) support members (13) having reinforcement members (14) of channel shape in cross section fitted to the projected parts of upper and lower band-shaped surface plates therebetween at the longitudinal both end parts of the band-shaped surface plates with side faces formed in generally box shape by bending and folding the band-shaped surface plates inward through four lines in the longitudinal direction thereof and at least one intermediate part thereof, wherein (c) the plurality of upper surface plates (11) are connected to the upper or to the upper and lower parts of the plurality of support members (13) orthogonally to each other.

Description

Description Transport pallet Technical field

The present invention relates to a transport pallet that is lightweight, has excellent durability, and can be easily assembled. Background art

Conventional transport pallets often use wooden pallets because of the availability of materials and easy processing. Wooden pallets are liable to be deformed or damaged by repeated loading of heavy loads, and the use of metal pallets such as steel sheets has recently become widespread from the viewpoint of environmental issues. Such metal pallets are strong, but heavy, and tend to be complicated to process. Conventionally, various ideas have been devised in terms of cost, weight, and strength. For example, the following technologies are known.

(i) As shown in Fig. 7, a conventional metal pallet is composed of a steel vertical member 41 and a horizontal member 43 having a plurality of U-shaped cross sections, arranged in a frame shape. The portions where 3 were in contact with each other were fixed by welding to form a frame body 49, which was a transport pallet 50.

(ii) Japanese Patent Application Laid-Open No. 115-157040 discloses that a square polypropylene or recycled polypropylene is integrally formed by an injection molding method or a press molding method on a face plate, and the upper surface side becomes a concave portion opening upward. A plurality of downwardly protruding legs that can be fitted into the concave portions on the lower surface side are provided vertically, and both ends in the fork pull-out direction and fork insertion portions that are opened downward are provided between the lower surface side legs of the face plate. A transport pallet is described which is formed in such a manner that it is arranged vertically and stacked.

(iii) Utility Model Registration No. 3 0 5 3 9 6 4 Both sides are bent inwardly into an L-shape, and are integrally formed with a face plate that forms a tight end, and a recess on both sides of the corresponding surface of the recess. A pallet having a joint formed with a notch, and a pallet in which two face plates corresponding in parallel are fitted into and combined with the prism by the concave notch, and are joined by spot welding. ing.

The conventional transport pallet has the following problems.

(1) The conventional metal transport pallet shown in Fig. 7 has a problem that it is not strong enough for its heavy weight, but has a large number of welded parts, requiring a large amount of manufacturing labor and large welding equipment. There was a point.

(2) The transport pallet described in Japanese Patent Application Laid-Open No. H11-157754 is poor in durability because it is made of synthetic resin such as polypropylene, and is flammable, so it can be used in a fire. Generated toxic gas and required special digestion equipment.

(3) In the pallet described in Japanese Utility Model Registration No. 3 053 964, the load applied between the two face plates is supported by a prism having a complicated shape with concave notches on the upper and lower sides. As a result, stress tends to concentrate on these gaps, etc., and there is a problem in that, in addition to lack of durability, the manufacturing of this prism requires a lot of man-hours and lacks economic efficiency.

The present invention has been made to solve the above-mentioned problems, and is lightweight, has necessary durability, has excellent safety in handling and fire, and is easy to manufacture and assemble. The purpose is to provide pallets. Disclosure of the invention

The transport pallet according to claim 1,

(a) an upper face plate comprising a metal strip-shaped face plate formed in a cross-sectional shape in which (n + 1) convex portions and n (n is a natural number) concave portions are alternately arranged; ,

(b) The band-shaped face plate is bent and wound inward at four locations in the longitudinal direction, and the side face is substantially square-shaped. A support member in which a reinforcing member having a U-shaped cross section is fitted to a convex portion between the upper and lower band-shaped face plates at both ends in the longitudinal direction, and at least one of the intermediate portions. A pallet,

(c) A transport pallet, wherein a plurality of the upper face plates are joined to upper portions or upper and lower portions of the plurality of support members so as to be orthogonal to each other.

The transport pallet according to claim 2 is

(a) an upper face plate comprising a metal strip-shaped face plate formed in a cross-sectional shape in which (n + 1) convex portions and n (n is a natural number) concave portions are alternately arranged;

(b) A reinforcing member having a U-shaped cross section is fitted to the protruding portion between the upper and lower belt-shaped face plates at the longitudinal end portions of the belt-shaped face plates vertically arranged opposite to each other and at least one portion at the intermediate portion. A pallet comprising a combined support member and

The following effects are obtained by the above configuration.

(1) Since the belt-shaped face plate has a zigzag cross section in which a plurality of (n + 1 (n is a natural number)) convex portions and a plurality of (n) concave portions are alternately arranged, it is formed by convex portions and concave portions. By increasing the resistance of the band-shaped face plate to bending in the longitudinal direction, rigidity that does not bend even when a heavy object is loaded can be obtained, and stability in pallet transportation can be improved.

(2) Since it has a zigzag cross section, it can be reduced in weight for the whole volume, and it is easy to disassemble when moving an empty pallet and is excellent in handling.

(3) Since the upper face plate and the belt-like face plate constituting the support member are formed of a metal plate, no toxic gas is generated even in the event of a fire, and the safety is excellent.

(4) Since the strip-shaped face plate can be integrally formed from a metal plate by press forming, knurling, etc., it can be easily manufactured and assembled, and the transport pallet can be manufactured at low cost.

(5) A plurality of convex portions formed in parallel with the upper and lower belt-like face plates facing the support member , The reinforcing members are fitted and combined with the pair of convex portions at both ends, so that both ends of the reinforcing member are fitted to the convex portions of the belt-shaped face plate constituting the supporting member. It can be assembled and disassembled very easily.

(6) Since the support member reinforced with the reinforcing member can be attached to the upper face plate serving as the pallet mounting surface by welding, the assembling can be easily performed.

(7) If the support member is fixedly arranged by welding or the like perpendicular to the lower part of the upper face plate, the strength of the transport pallet can be improved, and heavy objects can be transported safely and the pallet can be transported safely. Life can be increased.

(8) With regard to the pallet of claim 1, a rigid pallet can be obtained in which the number of reinforcing members to be fitted is reduced by using a formed supporting member formed by bending the band-shaped face plate at four points in the longitudinal direction, Assembly of the members is also easy. Furthermore, since the cut surface is not exposed at the end in the longitudinal direction, the safety is excellent.

The metal plate material integrally formed with the belt-shaped face plate may be made of not only steel plate, but also, if corrosion resistance is required, plated steel plate with zinc plating or stainless steel plate, etc. . When it is required to be lightweight, an aluminum alloy such as duralumin may be used.

The reinforcing member is formed, for example, by bending a band-shaped metal plate into a U-shape. A pair of upper and lower band-shaped face plates are arranged in parallel at predetermined intervals through this reinforcing member, and connected and supported. Can be reinforced without being crushed.

The upper face plate, the support member, the reinforcing member, and the like can be joined by known means such as welding, bolting, and riveting.

In the transport pallet according to the third aspect, the L-shaped portions provided at both ends in the width direction of the belt-shaped face plate are formed by folding back inward, so that the sharp end does not protrude outward. In addition to enhancing safety, it is possible to improve the resistance to external force in the direction in which the belt-shaped face plate is bent.

The transport pallet described in claim 4 is the same as the invention described in any one of claims 1 to 3. In this case, a longitudinal end of the upper face plate is provided with a protective portion which is squashed and bent downward in an L-shape.

According to the above configuration, the following operations can be obtained in addition to the operations of claims 1 to 3.

(1) Since the upper plate serving as the pallet mounting surface has a protective portion formed by crushing and bending the end of the band-shaped plate in an L-shape, even if a person or a load comes in contact with the transport pallet. The damage can be minimized, and the safety during handling and transportation of the pallets can be ensured.

(2) Since the protection part can be easily formed simply by squashing the end of the belt-shaped face plate inward in an L-shape, the transport pallet can be produced extremely easily, and the economy is excellent. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a transport pallet according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of a belt-like face plate in the transport pallet according to the first embodiment. FIG. 3 is a perspective view of a support member in the transport pallet according to the first embodiment. FIG. 4 is a perspective view of a reinforcing member of the transport pallet according to the first embodiment. FIG. 5 is a perspective view of a main part of the transport pallet according to the second embodiment of the present invention. FIG. 6 is a schematic diagram showing the structure of the support member according to the second embodiment. FIG. 7 is a perspective view of a conventional transport pallet. BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1)

Hereinafter, a first embodiment which is an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a transport pallet according to the first embodiment.

In FIG. 1, 10 is the transport pallet of the first embodiment, and 11 is the convex portion 11a. An upper face plate composed of a band-shaped face plate having a zigzag cross-section in which concave portions 1 1b are alternately arranged. The L-shaped part, 13 is a surface where the upper surface is welded to a predetermined location on the back side of the concave part 1 1b, and the belt-shaped face plate is bent inward at four locations in the longitudinal direction and wound. A support member formed in a frame shape (a state in which the side surface is formed in a substantially square shape) formed entirely of 3 a to l 3 e. , 13c or between the surfaces 13e, 13c.

The transport pallet 10 is composed of a plurality of (in this case, three) support members 13 arranged in parallel, and a plurality of (in this case, five) upper face plates 11 attached to the support members 13, 13. , 13 are straddled on the upper part and each contact point is fixedly joined. Known means such as spot-seam welding, bolting, and rivet caulking can be used for the fixed joint.

As shown in FIG. 2, a plurality of (n + 1, three in the figure) convex portions 11 a and a plurality (n, two in the figure) of the strip-like face plates constituting the upper face plate 11 and the support member 13 are provided. Of the convex portions 11a at both ends in the width direction are provided with L-shaped portions 12 formed by bending the outer ends of the convex portions 11a inward into an L-shape. Are integrally formed from a band-like metal plate.

With the structure including the belt-like face plate having such a zigzag cross section and the support member 13 reinforced by the reinforcing member 14, even if a heavy object is loaded on the transport pallet 10, the load can be deflected. No rigidity is obtained. The natural number n can be set, for example, in a range of 2 to 10.

As shown in FIG. 3, the support member 13 is formed by bending the belt-like face plate inward at four points in the longitudinal direction to form faces 13a to l3e, and the side-opening rectangle surrounded by these. It is molded into a frame. This bending can be easily performed by crushing and bending the bending line portion using a press brake or the like. Also, as shown in FIG. 3 (b), the concave portion 17 of the support member, which becomes a side portion when bent, and the side portion 16a of the support member And the end 18 of the support member may be cut off, and the convex portion 16 of the support member, which is the bottom of the support member, may be bent along the fold line A so that the support member is bent without providing a crushed portion. .

As shown in FIG. 4 (a), the reinforcing member 14 may be formed in a U-shaped cross section surrounded by surfaces 14a to 14c, or in a square shape. The reinforcing member 14 is formed by bending so as to have the above-described cross-sectional structure. The surface 14a having the width of the bent portion is set to the width of the convex portion 11a, and when fitted to the convex portions 11a at both ends, the width is further reduced by the width of the end.

The U-shape can be arranged so that the direction of the U-shape is different from the figure by 90 degrees (see Fig. 4 (b)), or the end can be bent inward to form a C-shaped cross section (Fig. 4 (c)). In the present invention, the U-shape, the U-shape, and the C-shape are collectively referred to as a U-shape.

As shown in FIG. 1, at at least one of the two end portions and the intermediate portion of the support member 13, the reinforcing member 14 is arranged between the upper and lower two belt-shaped face plates facing the support member 13. In addition, if necessary, the end of the strip-shaped face plate of the upper face plate 11 is bent and welded or bolted to the support member 13 or a reinforcing plate such as an L-shaped bracket is attached and welded and bolted. Can be combined to reinforce the whole.

Since the transport pallet 10 of the first embodiment is configured as described above, it has the following excellent functions.

(1) Since the belt-like face plates constituting the upper face plate 11 and the support member 13 have a cross section in which the convex portions and the concave portions are alternately arranged, the resistance to bending in the direction in which the cross section extends is enhanced and the durability is improved. And stability can be maintained.

(2) The weight can be reduced for the whole volume, and the handling of disassembly and assembly when moving an empty pallet can be facilitated.

(3) Since the transport pallet 10 is formed from a metal plate, no toxic gas is generated even in the event of a fire, and the safety is excellent. (4) Since the upper face plate 11, the support member 13 and the reinforcing member 14 can be integrally formed from a metal plate by press forming, roll forming, or the like, the production and assembly thereof can be facilitated, and the transport pallet 10 can be manufactured at low cost. Can be manufactured.

(5) If the L-shaped portion 12 is formed by bending both ends in the width direction of the belt-shaped face plate, damage can be reduced even if the sharp end comes in contact with a person or another mounted object. . BR>

(6) Since the lightweight supporting member 13 reinforced with the reinforcing member 14 is attached to the back side of the belt-shaped face plate, the pallet can be easily assembled and disassembled.

(7) If the support member 13 is arranged by welding or bolting to the lower part of the upper face plate 11, the strength of the transport pallet 10 can be improved, and a heavy object can be stably transported. Can increase the life of the computer.

(8) Since the supporting member 13 formed by bending and winding the belt-like face plate is reinforced with the reinforcing member 14, the weight can be reduced while maintaining the necessary structural strength as the supporting member 13. it can.

(9) The reinforcing member 14 having a U-shaped cross section is easy to manufacture and inexpensive because the shape thereof is not complicated, and by arranging and removing an appropriate number of the reinforcing members 14, the mounting member can be mounted. Pallets can be configured according to weight.

(Embodiment 2)

A transport pallet according to a second embodiment of the present invention will be described.

FIG. 5 is an enlarged perspective view of a main part of the transport pallet according to the second embodiment.

In FIG. 5, reference numeral 20 denotes a transport pallet according to the second embodiment, and reference numerals 21 and 2la denote zigzag cross sections in which convex portions 11a and concave portions 11b (see FIG. 2) are alternately arranged. A pair of upper and lower upper and lower support plates, each consisting of a strip-shaped surface plate that is turned upside down, is a pair of upper and lower support plates 21 and 22. L-shaped parts formed by bending the ends inward, respectively, 23 are the upper and lower supporting plates 21 and 1a on the back side of each convex part 1 1a. A reinforcing member having a U-shaped cross section whose base ends are fitted and fixed by spot welding or the like, 24 is an upper support plate 2 1, a support member composed of a lower support plate 21a and a reinforcing member 23, 25 is an upper plate serving as a pallet mounting surface fixed and disposed on the upper support plate 21 by welding or the like, 26 is an upper surface A protection portion is formed by crushing and bending the end of the belt-like plate of the plate 25 in the longitudinal direction downward in an L-shape.

FIG. 6 is a schematic cross-sectional view showing a state in which the upper support plate 21 and the lower support plate 21 a of the support member 24 are connected to the reinforcing member 23.

As shown in FIG. 6, the support member 24 according to the second embodiment includes an upper support plate 21 and a lower support plate 21a formed of band-shaped face plates, and a reinforcing member 23 connecting these. Then, as shown in FIG. 6 (a), the upper and lower ends of the reinforcing member 23 are fitted on the back side of the central convex portion 11a of the upper support plate 21 and the lower support plate 21a, and The support plate 21 and the lower support plate 21a are connected to each other.

Also, as shown in Fig. 6 (b), the upper and lower ends of the reinforcing member 23 are fitted to the biconvex portions 11a at both ends in the width direction of the upper support plate 21 and the lower support plate 21a. They can also be combined and connected. The number of the reinforcing members 23 can be appropriately determined according to the weight of the object to be placed, and a pallet for transportation that does not easily deform can be provided.

In this way, a plurality of support members 24 connected and configured by combining the upper support plate 21 and the lower support plate 21a, each of which is a strip-shaped face plate, are arranged in parallel by the reinforcing member 23, and these support members are supported in parallel. A plurality of upper face plates 25 are placed on the member 24 in a direction perpendicular to each other, and the upper surface of the upper support plate 21 and the lower surface of the upper face plate 25 are spot welded or bolted at each contact point. Thus, the transport pallet 20 of the second embodiment is formed.

In this case, the protection portion 2 is formed by crushing the end of the upper face plate 25, which is the pallet mounting surface disposed on the upper support plate 21, where the sharp cut portion is exposed downward into an L-shape. 6 can be formed. By forming the protection portion 26, it is possible to prevent the cut end face of the upper face plate 25 made of a belt-like face plate from being exposed, and to prevent the body and clothes of the worker from being damaged. In addition, the processing method of bending the belt-shaped face plate Applying the method of bending the belt-shaped face plate inward described in the first embodiment facilitates the L-shaped bending process.

Since the transport pallet 20 of the second embodiment is configured as described above, it has the following excellent functions.

(1) Since the upper face plate 25 is laminated on the support member 24 in which the upper support plate 21 and the lower support plate 21a composed of a plurality of strip-shaped face plates are connected to each other by the reinforcing member 23, the entire structure Strength and rigidity can be increased.

(2) The direction of the zigzag cross section of each of the belt-like face plates of the support member 24 and the upper face plate 25 is alternately shifted by 90 degrees, thereby twisting the face of the transport pallet 20. And the stability when transporting the transport pallet 20 can be improved.

(3) The upper and lower ends of the reinforcing member 23 are fitted to the back surface of the convex portion 11a of each of the upper support plate 21 and the lower support plate 21a to be connected and laminated, and assembled. It can be easily disassembled and has excellent workability.

(4) By forming the protection part 26, even if a person or an object comes in contact with the transport pallet 20, the damage can be minimized, and the pallet can be handled safely. Nature can be secured.

(5) The protection part 26 can be easily formed simply by squeezing the end of the strip-shaped face plate of the upper face plate 25 serving as the pallet mounting surface in an L-shape, so that the safety is extremely easy and high. The transport pallet 20 can be manufactured, and it is also economical. Industrial applicability

The transport pallet of the present invention includes an upper face plate made of a metal band-like face plate such as a copper plate integrally formed so as to have a cross-sectional shape in which a plurality of convex portions and concave portions are alternately arranged, and a support member. Since it is connected by fitting it to the convex part via a reinforcing member made of steel, which is easy to manufacture, etc., it is assembled and disassembled. It is easy, lightweight and robust.

Claims

The scope of the claims

1. (a) Upper face plate consisting of a metal strip-shaped face plate formed with a cross-sectional shape in which (n + 1) convex portions and n (n is a natural number) concave portions are alternately arranged. When,

(b) The upper and lower strips at both ends in the longitudinal direction and at least one spot in the middle, which are bent inwardly at four places in the longitudinal direction of the strip-shaped face plate and the side faces are formed in a substantially square shape. A pallet comprising: a support member in which a reinforcing member having a U-shaped cross section is fitted to a convex portion between face plates;

2. (a) An upper face plate consisting of a metal band-shaped face plate formed with a cross-sectional shape in which (n + 1) convex portions and n (n is a natural number) concave portions are alternately arranged. When,

(b) A reinforcing member having a U-shaped cross section is fitted to the protruding portion between the upper and lower belt-shaped face plates at both ends in the longitudinal direction of the belt-shaped face plate disposed vertically and at least one location in the middle part. And a pallet comprising:

3. The transport pallet according to claim 1, wherein the strip-shaped face plate is formed such that ends of convex portions at both ends in a width direction are bent inwardly in an L-shape.

4. The transport pallet according to any one of claims 1 to 3, wherein a longitudinal end of the upper face plate has a protection portion which is squashed and bent downward in an L-shape.