JP2010076784A - Assembly type pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly type pallet which is highly durable against water and oil, lightweight, easy to handle, easy to assemble and disassemble, and compact for transportation and for storage when not used. <P>SOLUTION: This pallet A includes an upper tray 1 and lower tray 2 both formed of a synthetic resin sheet. The upper tray 1 is formed with a flat panel 11 which serves as a receiving face on its inside and a fitting groove 14, whose cross section is inverted U-shaped and which opens downward, on its peripheral edge. The lower tray 2 is provided with a leg part 22 protruding toward the lower face side of a flat panel 21, and a joining side panel 24 which matches the groove 14 of the upper tray and fits the groove 14 by protruding upward on the peripheral edge. The upper tray 1 and the lower tray 2 are separably assembled by fitting the groove 14 with the joining side panel 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pallet that is repeatedly used for a cargo handling operation such as transportation of various kinds of luggage, and more particularly to an assembly-type pallet including an upper tray that receives luggage and a lower tray that receives and supports the upper tray.

  For example, pallets made of wood, plastic, metal, and the like have been conventionally used in cargo handling operations such as transporting products such as electrical products and lightweight machines or packages such as packages using forklifts. Pallets made of wood or metal have high strength and durability, but the pallet itself is heavy and difficult to handle, and there are also problems of resource protection and disposal.

  In recent years, pallets using corrugated cardboard sheets have emerged as substitutes for the pallets made of wood or metal from the viewpoints of resource protection, ease of disposal, ease of handling, and the like (for example, Patent Document 1). And Patent Document 2).

  In the case of a pallet made of corrugated cardboard sheets, a combination of an upper pallet member called a top plate or deck board portion for receiving a load and a lower pallet member called a seat leg portion or a digit portion for supporting the upper pallet member. The upper part of the portion into which the fork of the forklift is inserted is made to have a double structure so that the strength is maintained.

  However, the pallet made of corrugated cardboard sheets is one in which the upper and lower pallet members are fixed using an adhesive or the like in order to maintain the assembled state. As a result, assembly and disassembly cannot be repeated. Therefore, even when handling an empty pallet, it is bulky and requires a large space for storage and transportation.

  Moreover, since the pallet made of corrugated cardboard is made of paper, it easily deteriorates when moisture or oil adheres to it, and requires care in handling and storage. If it gets wet and water penetrates into the interior, the strength is lowered and bending deformation or breakage is likely to occur, and there is a problem in durability.

In addition, in the case of Patent Document 1, it is also shown that the both side ends of the lower pallet member are fitted and assembled to the U-shaped section formed on both side ends of the upper pallet member. Since a large space is required for the fitting, assembly work is not easy and it is difficult for one person to assemble.
Japanese Utility Model Publication No. 6-6235 JP-A-8-133287

  The present invention solves the above problems, is strong against moisture and oil, has excellent durability, is lightweight and easy to handle, can be easily assembled and disassembled, and is stored and transported when not in use. In this case, an object is to provide an assembly-type pallet that can be reduced in bulk.

  Each of the assembly-type pallets of the present invention that solves the above-described problems is an assembly-type pallet that is formed of a synthetic resin sheet and includes an upper tray that receives a load and a lower tray that receives and supports the upper tray. The upper tray has a flat plate portion that forms a load receiving surface, and a fitting groove having a concave section that opens downward is formed on at least one opposite two side edges of the peripheral portion. On the other hand, the lower tray is provided with a leg portion projecting to the lower surface side with respect to the flat plate portion serving as a support surface of the upper tray, and has a peripheral edge corresponding to the fitting groove of the upper tray. A coupling side plate that protrudes upward and can be fitted into the fitting groove is provided on at least one opposing two side edges of the portion, and the upper tray and the lower tray are connected to the fitting groove. By fitting with the coupling side plate Characterized in that it is assembled to be separated.

  According to this assembly type pallet, when assembling, the upper tray that receives the load is stacked on the lower tray, and the fitting groove that opens downward of the upper tray and the upward connection of the lower tray are used. The side plate can be easily assembled and configured by fitting with the side plate corresponding to the upper and lower positions.

  In this assembled state, the upper tray and the lower tray are stacked and possess the necessary strength as a pallet. Therefore, the thickness of the upper tray and the lower tray can be reduced, and the weight of the pallet can be reduced. It becomes easy to handle. Moreover, since the upper tray and the lower tray are both formed from a synthetic resin sheet, they are strong against moisture and oil, and there is no fear of deterioration even when wet, or a decrease in strength. .

  When storing and transporting the pallet when not in use, the upper side tray and the lower tray can be easily separated by removing the coupling side plate from the fitting groove. In addition, it is possible to reduce the bulk by overlapping each lower tray.

  In the assembly type pallet, the upper tray has a side plate that rises from the flat plate portion, and a flange plate having a cross-sectional shape is extended from the upper end of the side plate outside the side plate. The fitting groove having a concave-convex cross section is formed. Thereby, the molding groove from the synthetic resin sheet can be formed without a problem with the fitting groove having a concave section opened downward.

  In the assembly type pallet, a fitting groove having a concave section is continuously provided over the entire periphery of the peripheral portion of the upper tray, and the fitting groove is fitted to the entire periphery of the peripheral portion of the lower tray. Particularly preferred are those provided with possible coupling side plates. In this case, the upper tray and the lower tray are coupled on the entire circumference of the peripheral edge portion, so that the coupling strength is high and it can be used with good stability. Further, the side plate and the like forming the fitting groove in the upper tray and the connecting side plate in the lower tray serve to reinforce the entire tray, and the shape retaining property is also maintained well. .

  In the assembly type pallet, the lower tray is formed with the leg portions at a distance from both sides and the center portion in one direction of front, rear, left and right in the plane, whereby the leg portions and the center portions on both sides are formed. It is assumed that a fork lift fork insertion portion is formed between the leg portion of the forklift. In this case, leg portions extending in the direction intersecting the insertion portion are provided at a plurality of positions at intervals in the direction along the insertion portion of the fork. What is formed and formed is preferable. That is, the leg portions of the central portion and both side portions, particularly the plurality of leg portions disposed at intervals in the direction along the fork insertion portion, bend and deform the entire inner portion of the lower tray. The regulating reinforcing function is achieved, and as a result, deformation of the upper tray supported by the lower tray can be prevented, and the shape retaining property as a pallet can be maintained well.

  The upper tray in the assembly-type pallet is configured such that the entire inner surface excluding the peripheral portion including the fitting groove is a flat plate portion, or the inner side excluding the peripheral portion including the fitting groove. It is also possible to form a downward-facing convex portion that can be fitted into the leg portion of the lower tray. In the former case, the upper tray can be easily formed. In the latter case, the bonding strength between the upper tray and the lower tray is further increased, and the strength of the legs is increased, so that a considerably heavy load can be received.

  As described above, according to the assembly-type pallet of the present invention, the upper tray that receives the load and the lower tray that receives and supports the upper tray are combined, and both trays are formed from a synthetic resin sheet. Because it is made of a body, it is strong against moisture and oil, has excellent durability, and can be thin and strong in weight, making it easy to handle. Especially, the upper tray and the lower tray are Since it can be assembled by fitting, it can be easily assembled and disassembled. When storing and transporting the pallet when it is not in use, it can be easily separated into individual trays and can be reduced in bulk. I don't need it.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  1 is a perspective view in which an upper tray and a lower tray of an assembly-type pallet according to the first embodiment of the present invention are separated, FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of the assembled state of the same, FIG. FIG. 5 is a plan view and a front view of the upper tray, FIG. 6 is a plan view and a front view of the lower tray, and FIG. FIG. 8 is a plan view and a front view of the upper tray of the second embodiment, FIG. 9 is a sectional view of the assembled state using the upper tray, and FIG. 10 is a stacked state of the upper tray. Sectional drawing and FIG. 11 are sectional views of the stacked state of the lower tray.

  1 to 6, 1 is an upper tray that receives a load, 2 is a lower tray that serves as a pedestal for receiving and supporting the upper tray 1, and each of which is made of a synthetic resin sheet, A flat rectangular pallet A is assembled by the upper tray 1 and the lower tray 2 formed by a molded body formed into a predetermined shape, which will be described later, by means of forming processing from a sheet such as vacuum forming, pressure forming or press forming. Consists of. In the case of the figure, the planar shape of the pallet A is a rectangle that is long (about twice as long) in the left-right direction with respect to the front-rear direction, but may be a square or a rectangle close to a square.

  The upper tray 1 has a flat plate portion 11 that forms the receiving surface of the load on the entire inner portion, and at least one opposite two side edges of the peripheral portion, preferably the entire periphery of the peripheral portion as shown in FIG. In each side edge, a concave groove-shaped fitting groove 14 opened downward is formed. In the case of the illustrated embodiment, a flange plate 13 having a side plate 12 rising from the flat plate portion 11 and having an upper plate portion 13a and an outer plate 13b on the outside of the side plate 12 is formed on the side plate 12. By extending from the upper end, the fitting groove 14 having a concave section is formed, and is formed so that a coupling side plate in the lower tray 2 described later is fitted. The groove width of the fitting groove 14 is set as described later according to the thickness and form of the coupling side plate.

  The fitting groove 14 having a concave-convex cross section, that is, the side plate 12 and the flange plate 13 that form the fitting groove 14 are partially formed intermittently at required intervals on each side edge. As shown in the figure, the side plate 12 and the flange plate 13 that form the fitting groove 14 reinforce the entire tray. This also serves as a reinforcing frame, and is particularly preferable.

  As shown in an enlarged view in FIG. 4, the side plate 12 and the outer plate 13b are slightly inclined for molding from a synthetic resin sheet, and therefore the fitting groove 14 is slightly expanded toward the lower opening side. The side plate for coupling of the lower tray 2 described later is easily inserted during assembly. Also, the lower end of the outer plate 13b is bent and cut outward for trimming, and the cut end 15 slightly protrudes outward, but the cut end 15 is not left. It can also be processed.

  Further, the lower tray 2 as the pedestal portion is formed with a leg portion 22 projecting to the lower surface side with respect to the flat plate portion 21 contacting the lower surface of the flat plate portion 11 as a support surface of the upper tray 1 at the time of assembly. Has been. The leg portion 22 is formed in one plane in the front, rear, left and right directions on the plane, for example, as shown in the figure, with a gap between the left and right side portions and the central portion, thereby forming the leg portions 22 on the both side portions and the leg on the central portion. A fork lift fork insertion portion 23 is formed between the portion 22 and the forklift so as to be parallel in the front-rear direction with a space left and right. The leg portions 22 on the both side portions and the leg portion 22 on the central portion are spaced so as to form a flat plate portion 21 at every required interval in the front-rear direction along the insertion portion 23 of the fork, and the insertion portion The leg portions 22 are formed so as to perform rib-like reinforcing action of the entire tray. Since the leg portion 22 is opened upward for molding from the synthetic resin sheet, in order to form the flat plate portion 21 serving as a support surface for the upper tray 1 substantially evenly over the entire surface, the interval as described above is used. It is good to form in several places.

  The lower tray 2 corresponds to the fitting groove 14 of the upper tray 1 and is preferably provided on at least one opposite two side edge of the peripheral portion, preferably as shown in FIG. On the side edge, a coupling side plate 24 that protrudes upward from the flat plate portion 21 and can be fitted into the fitting groove 14 having a concave cross section is provided. That is, the upper tray 1 and the lower tray 2 are brought into a state in which the flat plate portions 11 and 21 are in contact with each other as shown in FIG. The assembled side plate 24 is configured to be separable by being removed from the fitting groove 14.

  Therefore, as shown in the enlarged view of FIG. 4, the coupling side plate 24 is in contact with the flat plate portion 11 of the upper tray 1 and the flat plate portion 21 of the lower tray 2 in the state of being fitted in the fitting groove 14. The projecting length is set so as to achieve the above state.

  The coupling side plate 24 is usually inclined slightly outward for molding from a synthetic resin sheet, and a cut end 25 for trimming at the same time as molding is slightly outside the upper end portion 24a. The upper end portion 24a is slightly larger than the thickness of the material sheet. Therefore, the fitting groove 14 of the upper tray 1 is formed so that the coupling side plate 24 including the upper end portion 24 a can be fitted to the fitting groove 14.

  In particular, the groove width of the fitting groove 14 is usually set according to the thickness and form of the coupling side plate 24 so as to maintain a fitting state that does not come off unless a human force is applied. For example, the thickness is set to be slightly smaller than the thickness of the coupling side plate 24 including the upper end portion 24a so as to be fitted with a certain degree of interference fit. Even in this case, the fitting can be made elastically by utilizing elastic deformation of the outer plate 13b of the flange plate 13 forming the fitting groove 14. Moreover, in the said fitting state, the said cutting | disconnection end 25 will be in an engagement state with respect to the said outer side board 13b, and will also not be easily pulled out.

  In addition to the shape shown in the figure, the coupling side plate 24 may be formed in a double structure by folding the upper end portion outward or in a cross-sectionally concave shape. Also in these cases, it is preferable to set the groove width of the fitting groove 14 so that the fitting groove 14 can be elastically fitted.

  In any of the above cases, the coupling side plate 24 is formed continuously over the entire circumference of the peripheral edge corresponding to the fitting groove 14 of the upper tray 1, and is interrupted at every required interval at each side edge. It can also be formed into a shape. In particular, when the fitting groove 14 of the upper tray 1 is partially formed, it can be partially formed correspondingly. In practice, as shown in the figure, it is preferable to form continuously so as to form a frame over the entire periphery of the peripheral portion from the viewpoint of shape retention strength and the stability of the combined state due to fitting.

  When assembling and constructing the pallet A composed of the upper tray 1 and the lower tray 2 of the first embodiment described above, the upper tray 1 is stacked on the lower tray 2 and opened downward of the upper tray 1. A state in which the flat plate portions 11 and 12 of both trays 1 and 2 are overlapped with each other by fitting the fitting groove 14 and the upper side plate 24 for the upper side of the lower tray 2 corresponding to each other. Easy to assemble and configure. Also, the upper side tray 1 and the lower side tray 2 can be easily separated by removing the coupling side plate 24 from the fitting groove 14.

  In the first embodiment described above, the upper tray 1 is shown as a case where the entire surface of the inner portion excluding the peripheral portion including the fitting groove 14 is formed flat as the flat plate portion 11. In addition, as the upper tray 1, as in the second embodiment of FIGS. 7 to 9, the legs of the lower tray 2 in the assembled state are formed in the inner portion excluding the peripheral portion including the fitting groove 14. It is also possible to use a tray in which a downward convex portion 16 that can be fitted inside the portion 22 is formed. In the second embodiment, the configuration other than the formation of the convex portion 16, for example, the configuration of the fitting groove 14 formed by the side plate 12 and the flange plate 13 at the peripheral portion is the case of the first embodiment described above. Therefore, the same reference numerals are given and detailed description is omitted.

  The shape and arrangement of the convex portions 16 of the upper tray 1 are such that a part or the entire circumference of the convex portion 16 is inscribed and fitted to the leg portion 22 of the lower tray 2 in the assembled state, for example, as shown in the figure. 22 has a substantially same shape as that of the leg portion 22 and the entire peripheral surface is inscribed in the leg portion 22. However, since the convex portion 16 is opened upward, the flat plate portion 11 serving as a load receiving surface is almost entirely covered. It is desirable to arrange the convex portions 16 at intervals in the vertical and horizontal directions so as to remain evenly. For this reason, as the lower tray 2, the leg portions 2 on both side portions and the central portion are provided at a plurality of positions at intervals in the front-rear direction, for example. It is better to implement this.

  Also in this second embodiment, the upper tray 1 is overlaid on the lower tray 2, and the fitting groove 14 that opens downward of the upper tray 1 is formed on the coupling side plate 24 upward of the lower tray 2. By fitting the convex portion 16 to the leg portion 22, the flat plate portions 11 and 12 of both trays 1 and 2 can be easily assembled and configured. In particular, in this case, not only the fitting groove 14 and the coupling side plate 24 are fitted, but also the inner portion is joined by the fitting of the convex portion 16 and the leg portion 22. 1 and the lower tray 2 are increased in strength, and bending deformation of the inner portion of the upper tray 1 is suppressed, so that the pallet as a whole is not easily deformed. The double structure increases pressure resistance. Then, the upper side tray 1 and the lower side tray 2 can be easily separated by removing the coupling side plate 24 from the fitting groove 14 and removing the convex portion 16 from the leg portion 22.

  In any case of the pallet A of the first embodiment and the second embodiment described above, the upper tray 1 and the lower tray 2 are stacked, and the lower tray 2 is placed on the lower surface of the flat plate portion 11 of the upper tray 1. The flat plate portion 21 of the side tray 2 abuts to form a double structure. In particular, in the case of the second embodiment, the inner portion is also joined by the fitting of the convex portion 16 and the leg portion 22, so that bending deformation is suppressed and the pressure resistance strength is increased. The strength required for the receiving surface can be sufficiently retained. Therefore, the thickness of each of the upper tray 1 and the lower tray 2 can be reduced (for example, 1 to 3 mm), the weight of the pallet can be reduced, and handling becomes easy. Moreover, since the upper tray 1 and the lower tray 2 are both formed from a synthetic resin sheet, they are strong against moisture and oil, and may deteriorate even when wet or the strength may be reduced. In addition, the durability is also kept good.

  In addition, when storing and transporting the pallet A when not in use, it can be easily separated into the upper tray 1 and the lower tray 2 by removing the coupling side plate 24 from the fitting groove 14. As shown in FIG. 10 and FIG. 11, each upper tray 1 is overlapped with each lower tray 2, and is preferably handled by lowering the bulk by partially nesting and overlapping. And space for storage and transportation can be reduced.

  For example, FIG. 10 shows a state in which the upper tray 1 of the second embodiment is overlapped, and the side portion (side plate 12) that forms the fitting portion 14 having a concave cross-sectional shape varies depending on the thickness of the material sheet. And the outer side plates 13b) and the side portions of the convex portion 16 form a tapered surface that expands toward the opening side, so that the upper trays 1 are stacked in a nested state.

  FIG. 11 shows a state in which the lower tray 2 is stacked, and the coupling side plate 24 is inclined outward, and the side surface portion of the leg portion 22 forms a tapered surface that expands toward the opening side. Each lower tray 2 is stacked in a nested state.

  In addition, as a synthetic resin sheet used for the upper tray 1 and the lower tray 2 of the pallet A of the present invention, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyester resins such as polyethylene terephthalate, polystyrene, etc. Various synthetic resin sheets such as resin and polyvinyl chloride resin can be used. Among them, a sheet of polyolefin resin that can be easily recycled and has toughness and hardly cracks is preferably used. In particular, even if assembly and disassembly by fitting is repeated, it is difficult to break and has excellent durability.

  This synthetic resin sheet varies depending on the size of the pallet A, the weight of the load to be loaded, etc., but a sheet having a thickness of 1 to 5 mm, preferably 1 to 3 mm is used. It is easily formed into the shape of the upper tray 1 and the lower tray 2 described above. Further, for vacuum forming or the like, the mold may be simple and can be manufactured at low cost.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a pallet used in a cargo handling operation in which various products such as electrical products and lightweight machines, or their packages are transported using a forklift.

It is the perspective view which isolate | separated the upper tray and lower tray of the assembly-type pallet which shows the 1st Example of this invention. It is sectional drawing same as the above. It is sectional drawing of an assembly state same as the above. It is a partial expanded sectional view of the separation state (a) and fitting state (b) of a fitting part same as the above. It is the top view (a) and front view (b) of an upper tray. It is the top view (a) and front view (b) of a lower tray. It is a perspective view of the upper side tray of the 2nd example. It is the top view (a) and front view (b) of an upper tray same as the above. It is sectional drawing of the assembly state using an upper tray same as the above. It is sectional drawing of the accumulation state of an upper tray. It is sectional drawing of the stacked state of a lower tray.

Explanation of symbols

  A ... Pallet, 1 ... Upper tray, 2 ... Lower tray, 11 ... Flat plate portion, 12 ... Side plate, 13 ... Flange plate, 13a ... Upper plate portion, 13b ... Outer plate, 14 ... Fitting groove, 15 ... Cutting end , 16 ... convex part, 21 ... flat plate part, 22 ... leg part, 23 ... insertion part of fork, 24 ... side plate for coupling, 24a ... upper end part, 25 ... cut end.

Claims (7)

Each is a molded product from a synthetic resin sheet, and is an assembly-type pallet composed of an upper tray for receiving a load and a lower tray for receiving and supporting the upper tray,
The upper tray has a flat plate portion that forms a receiving surface for the load, and is formed with a concave groove-shaped fitting groove that opens downward at at least one of the two opposite side edges of the peripheral portion. On the other hand, the lower tray is formed with a leg portion protruding to the lower surface side with respect to the flat plate portion serving as a receiving surface of the upper tray, and corresponding to the fitting groove of the upper tray, A coupling side plate that protrudes upward and can be fitted into the fitting groove is provided on at least one opposing two side edges,
The assembly type pallet, wherein the upper tray and the lower tray are assembled so as to be separable by fitting the fitting groove and the coupling side plate.   The upper tray has a side plate that rises from the flat plate portion, and a flange plate having a cross-sectional shape is extended from the upper end of the side plate to the outside of the side plate, so that the fitting having a concave section is formed. The assembly type pallet according to claim 1, wherein a groove is formed.   A fitting groove having a concave and concave section is provided continuously over the entire circumference of the peripheral edge of the upper tray, and a coupling side plate that can be fitted into the fitting groove is provided on the entire circumference of the peripheral edge of the lower tray. The assembled pallet according to claim 1 or 2.   In the lower tray, the legs are formed at a distance from both sides and the center in one direction of front, rear, left and right on the plane, so that the gap between the legs and the legs of the center is formed. The assembly type pallet according to any one of claims 1 to 3, wherein a fork lift fork insertion portion is formed on the forklift.   The leg portions extending in the direction intersecting the insertion portion are arranged and formed at a plurality of positions at intervals in the direction along the insertion portion of the fork. Item 5. The assembly type pallet according to Item 4.   The assembling-type pallet according to any one of claims 1 to 5, wherein the upper tray has an entire inner surface including a flat plate portion excluding a peripheral edge portion including the fitting groove.   The upper tray is formed with a downward-facing convex portion that can be fitted into a leg portion of the lower tray at an inner portion excluding a peripheral portion including the fitting groove. The assembly type pallet according to item 1.

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