JP5369267B1 - Pallet for cargo handling - Google Patents

Abstract

The present invention provides a cargo handling pallet having improved durability by increasing the strength of a joint portion of a girder.
A plurality of girders 21 and 31 are respectively provided on opposing surfaces 20b and 30b of an upper base material 2 and a lower base material 3, and the corresponding girder portions 21 and 31 are joined to each other to join the upper base material 2 and the lower base material. In the cargo handling pallet 1 to which the material 3 is assembled, the girder portions 21 and 31 include base portions 22 and 32 that protrude from the opposing surfaces 20 b and 30 b of the upper base material 2 and the lower base material 3, and the base portion 22. -Convex portions 23, 33 projecting from the butting surfaces 22a, 32a of 32, and recesses 24, 34 recessed from the same butting surfaces 22a, 32a from which the projecting portions 23, 33 are projecting In the state where the upper base material 2 and the lower base material 3 are assembled, the convex portions 23 and 33 and the concave portions 24 and 34 of the corresponding girder portions 21 and 31 are fitted, and the base portions 22 and 32 are abutted. The surfaces 22a and 32a are brought into contact with each other.
[Selection] Figure 3

Description

  The present invention relates to a technology for a cargo handling pallet, and more specifically, a plurality of girders are respectively provided on opposing surfaces of an upper base material and a lower base material, and the corresponding girders are joined to each other to form the upper base material and the lower base material. The present invention relates to a cargo handling pallet to which a base material is assembled.

  Conventionally, cargo handling pallets used for cargo handling work in factories and warehouses are made of wooden, synthetic resin, metal, or paper pallets, and have multiple girders on the opposing surfaces of the upper and lower substrates. A configuration in which the upper base material and the lower base material are assembled by connecting the corresponding girder portions to each other is known. Such a cargo handling pallet has a cargo handling surface on one side (upper base material) or both sides (upper base material and lower base material), and usually a forklift claw (fork) is provided to separate the upper base material and the lower base material. Is formed so that it can be inserted from two or four directions.

  As a conventional pallet for cargo handling, for example, as disclosed in Patent Document 1, a plurality of girder parts bulge on opposing surfaces of an upper base material and a lower base material, and such girder parts are formed in an outer peripheral part and a central part. The structure arrange | positioned so that it may become equal intervals is well-known. In such a configuration, in a state where the upper base material and the lower base material are assembled, the corresponding girders are brought into contact with each other at the abutting surface, and the abutting portion of the abutting surface is spot welded, adhesive, or a fastener (bolt or the like). ) Etc. to be integrated.

  Further, for example, as disclosed in Patent Document 2 and Patent Document 3, a convex portion or a concave portion is provided on the butting surface of the beam portion, and the convex portion and the concave portion are formed in a state where the upper base material and the lower base material are assembled. A configuration adapted to be fitted is also proposed. Compared with the cargo handling pallet disclosed in Patent Document 1, positioning can be facilitated when the upper base material and the lower base material are assembled, and the girder portion is formed by the fitted convex portions and concave portions. The strength of the joint portion is increased.

  However, in the pallet for cargo handling disclosed in Patent Document 2 and Patent Document 3 described above, one convex portion or a concave portion is provided in one girder portion of the upper base material and the lower base material, and corresponds to the other girder portion. Since one convex part or concave part is provided, in the state where the upper base material and the lower base material are assembled, in addition to the contact part of the butt surface, at one fitting part of the convex part and the concave part The girder was joined. Therefore, for example, when a large impact is applied due to contact between forklift claws, collision between pallets, or dropping from a high place, the strength of the joint part of the girder is insufficient, and In some cases, peeling or lateral displacement may occur.

Japanese Patent Laid-Open No. 10-16968 Special table 2008-539134 gazette Special table 2008-502554

  Accordingly, the present invention relates to a cargo handling pallet that solves the above-described conventional problems, and an object thereof is to provide a cargo handling pallet that has improved durability by increasing the strength of the joint portion of the beam portion.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in Claim 1, a plurality of girders are respectively provided on the opposing surfaces of the upper base material and the lower base material, and the corresponding base portions are joined together to assemble the upper base material and the lower base material. In the above, the girder includes a base part projecting on the opposing surfaces of the upper base material and the lower base material, a convex part projecting on the abutting surface of the base part, and the convex part projecting A concave portion provided in the same abutting surface and a space portion provided in the same abutting surface provided with the convex portion and the concave portion, and the girder portion includes a pair of convex portions and A pair of recesses are respectively arranged at symmetrical positions with respect to a central axis perpendicular to the abutment surface of the base part and at each vertex position of a square centering on the central axis, and the upper base material and the lower base material are In the assembled state, the projections and recesses of the corresponding girder are respectively Fitted, abutting surfaces of the base portion is intended to be abutting.

In Claim 2 , the said upper base material is opened by the cargo handling surface formed in the opposite side to the said opposing surface, and the convex part of another upper base material engages on the axial center of the convex part of the said girder part. Possible insertion holes are drilled.

According to a third aspect of the present invention, the upper base member has a reinforcing rib extending on the facing surface.

According to a fourth aspect of the present invention, the upper base material and the lower base material are formed such that the beam portions have the same shape.

According to a fifth aspect of the present invention, the upper base material and the lower base material are formed in the same shape, and constitute a double-sided pallet in a state where the upper base material and the lower base material are assembled.

  As an effect of the present invention, the durability can be improved by increasing the strength of the joint portion of the beam portion.

It is the perspective view which showed the whole structure of the pallet for cargo handling which concerns on one Example of this invention. It is a side view of the pallet for cargo handling. It is AA arrow sectional drawing of the pallet for cargo handling of FIG. It is a side view of an upper base material. It is an opposing surface side perspective view of an upper base material. It is an opposing surface side top view of an upper base material. It is a top view of a girder part. It is BB arrow sectional drawing of the girder part of FIG. It is CC sectional view taken on the line of FIG. It is the figure explaining the assembly | attachment state of an upper base material and a lower base material.

  Next, modes for carrying out the invention will be described.

First, the overall configuration of the cargo handling pallet 1 of this embodiment will be outlined below.
As shown in FIGS. 1 to 3, the cargo handling pallet 1 of the present embodiment is configured by integrally assembling an upper base material 2 and a lower base material 3, and specifically, is formed in the same shape. A plurality of girders 21 and 31 are provided at opposed positions on the opposed surfaces 20b and 30b of the upper base 2 and the lower base 3, respectively, and the corresponding girders 21 and 31 are joined to each other to join the upper base 2 and the lower base. The material 3 is assembled.

  The cargo handling pallet 1 is formed as a double-sided pallet having cargo handling surfaces 20a and 30a on both surfaces (upper base material 2 and lower base material 3) in a state where the upper base material 2 and the lower base material 3 are assembled. Further, a fork insertion portion 4 into which a fork lift claw (fork) can be inserted is formed between the upper base member 2 and the lower base member 3 and between the adjacent beam portions 21 and 31. In the present embodiment, the fork insertion part 4 is opened in four directions of the cargo handling pallet 1 so that the forklift claw can be inserted from the four directions.

  In the following examples, the configuration of the upper base material 2 will be mainly described. However, unless otherwise specified, the configuration of the lower base material 3 is the same as the configuration of the upper base material 2, and the detailed description thereof is as follows. Omitted.

Next, the configuration of the upper substrate 2 will be described in detail below.
As shown in FIGS. 4 to 6, the upper base material 2 constitutes the upper half of the cargo handling pallet 1, and a pallet body 20 formed as a rectangular plate-like body formed in a square shape in plan view, and the pallet It comprises a plurality of (9 in this embodiment) beam portions 21, 21... Provided on the opposing surface 20 b of the body 20. The material of the upper substrate 2 of the present embodiment is not particularly limited, and a known material such as a synthetic resin is used, and the pallet body 20 and the girder 21 are integrally formed. For example, pulverized chips made of thinned wood from trees such as cedar and cypress (including leaves, end trees, branches, roots, etc.) are mixed with thermosetting adhesives such as phenol resin and urea-melamine co-condensation resin. And may be formed by hot pressing.

  The pallet body 20 has a horizontal loading surface 20a on which the load is placed on the upper surface, and a horizontal facing surface 20b that faces the lower base 3 on the lower surface. Reinforcing ribs 20c projecting with a height dimension lower than that of the girder 21 are extended on the facing surface 20b. In the upper base material 2 of the present embodiment, a plurality of reinforcing ribs 20c, 20c,... Extend linearly along the spacing between adjacent beam portions 21.

  The upper base material 2 is provided with a fitting hole 26 opened in the cargo handling surface 20a (see FIGS. 1 and 8, etc.). The insertion hole 26 is formed on the same axial center of the convex portion 23 of the later-described girder portion 21, and when the other upper base material 2 is placed on the cargo handling surface 20 a of the upper base material 2, the other upper portion The convex part 23 of the girder part 21 of the base material 2 is formed so that it can be fitted. In the present embodiment, since the upper base material 2 and the lower base material 3 are formed in the same shape, the convex portion 33 of the lower base material 3 can be similarly inserted into the insertion hole 26.

  Further, the upper base material 2 is provided with a drain hole 27 penetrating from the cargo handling surface 20a to the opposing surface 20b (see FIGS. 1 and 3). The drainage holes 27 are respectively opened in the reinforcing ribs 20c provided on the cargo handling surface 20a and the opposing surface 20b, and water accumulated on the cargo handling surface 20a is directed downward from the cargo handling surface 20a via the drainage holes 27. Discharged.

  As shown in FIGS. 5 to 9, the girder portions 21 are provided on the facing surface 20 b of the upper base material 2 (pallet body 20), and are arranged at equal intervals on the outer peripheral portion and the central portion of the pallet body 20. ing. Specifically, the girder part 21 includes a base part 22 protruding from the facing surface 20 a of the upper base member 2, a convex part 23 protruding from the abutting surface 22 a of the base part 22, and a convex part 23. Are formed on the same abutting surface 22a provided with a recess 24 and the like, which are recessed. Each girder 21, 21... Has a base part 22, a convex part 23, a concave part 24, and the like formed in the same shape, and is arranged and adjusted on the pallet body 20 so that each component faces the same direction. (See FIG. 5 or FIG. 6).

  The base part 22 is formed in a quadrangular pyramid shape, and a butt face 22a having a horizontal plane is formed on the top. The base portion 22 is formed with a substantially cruciform space portion 25 in a plan view in other portions except on the axial centers of the convex portion 23 and the concave portion 24 described later, and the space portion 25 is opened to the abutting surface 22a. ing. Thus, the space part 25 is formed in the base part 22, and the upper base material 2 (girder part 21) is reduced in weight. In the girder portion 21 disposed on the outer peripheral portion of the pallet body 20, the base portion 22 is provided so as to be continuous with the outer peripheral edge of the pallet body 20.

  The convex portion 23 is formed as a cylindrical protrusion having a circular cross section, and protrudes in a direction perpendicular to the abutting surface 22 a of the base portion 22. The recess 24 is formed as a bottomed cylindrical hole having a circular cross section that is opened in the abutting surface 22 a of the base portion 22. In the girder portion 21 of this embodiment, a pair of convex portions 23 and 23 and a pair of concave portions 24 and 24 having the same shape are provided on one base portion 22.

  The arrangement and shape dimensions of the projections 23 and the depressions 24 will be described in detail. The girder 21 corresponds to a case where a pair of girder portions 21 and 21 are brought into contact with the abutment surface 22a of the base portion 22 respectively. The projecting portion 23 and the recessed portion 24 are fitted to each other so that the butted surface 22a is brought into close contact therewith. That is, as the arrangement configuration of the convex portion 23 and the concave portion 24, the pair of convex portions 23 and 23 and the pair of concave portions 24 and 24 are in symmetrical positions with respect to the central axis C orthogonal to the abutting surface 22 a of the base portion 22. They are provided and arranged at respective vertex positions of a square centered on the central axis C in plan view so as to be equally spaced (see FIG. 7).

  As the shape dimensions of the convex portion 23 and the concave portion 24, the convex portion 23 and the concave portion 24 are formed in dimensions that can be fitted respectively. Specifically, the outer diameter D1 of the convex portion 23 is larger than the hole diameter D2 of the concave portion 24. It is formed so as to be at least the same or smaller (D1 ≦ D2), and the protruding length L1 of the convex portion 23 is at least equal to or smaller than the hole depth L2 of the concave portion 24 (L1 ≦ L2). (See FIG. 8 and FIG. 9). The “projection length L1 of the convex portion 23” refers to the length from the abutting surface 22a to the top of the convex portion 23, and the “hole depth L2 of the concave portion 24” refers to the length of the concave portion 24 from the abutting surface 22a. The length to the bottom.

Next, the assembled state of the upper substrate 2 and the lower substrate 3 will be described in detail below.
As shown in FIGS. 3 and 10, in the cargo handling pallet 1, the upper base member 2 and the upper base member 3 are opposed to each other with the opposing surfaces 20 b and 30 b facing each other, and the corresponding beam portions 21 and 31 are joined. It is assembled with. In the cargo handling pallet 1 of this embodiment, as described above, the upper base material 2 and the upper base material 3 have the same shape, that is, the beam portions 21 and 31 are equidistant from each other at the outer peripheral portion and the central portion of the pallet bodies 20 and 30. In addition, the upper base material 2 and the lower base material 3 are opposed to each other with the opposing surfaces 20b and 30b facing each other. In the corresponding girder parts 21 and 31, the arrangement of the convex parts 23 and 33 and the concave parts 24 and 34 is switched, and the pair of concave parts 34 and 34 of the girder part 31 is arranged on the axis of the pair of convex parts 23 and 23 of the girder part 21. Is positioned, and the pair of convex portions 33 and 33 of the girder portion 31 are positioned on the axis of the pair of concave portions 24 and 24 of the girder portion 21 (see FIG. 10A).

  And by making the upper base material 2 and the lower base material 3 approach from the state where the opposing surfaces 20b and 30b face each other, the corresponding girder portions 21 and 31 can be obtained from the arrangement configuration and dimensional shape of the girder portions 21 and 31 described above. , The convex part 23 of the girder part 21 is fitted into the concave part 33 of the girder part 31 and the convex part 32 of the girder part 31 is fitted into the concave part 24 of the girder part 21. 23 and 33 and the recessed parts 24 and 34 are fitted, respectively, and the butted surfaces 22a and 32a of the base parts 22 and 32 are brought into contact with each other (see FIG. 10B).

  In the cargo handling pallet 1 of this embodiment, the convex portions 23 and 33 and the concave portions 24 and 34 of the beam portions 21 and 31 are fitted, and the butted surfaces 22a and 32a of the base portions 22 and 32 are brought into contact with each other. However, the joint portions of the beam portions 21 and 31, that is, the fitting portions of the convex portions 23 and 33 and the concave portions 24 and 34 and the contact portions of the butted surfaces 22 a and 32 a are the fitted convex portions 23 and 33 and the concave portion 24. The joined state is maintained by the frictional force of 34, or they are joined and joined by a joining means such as a known adhesive.

  As described above, in the cargo handling pallet 1 of this embodiment, the plurality of beam portions 21 and 31 are provided on the opposing surfaces 20b and 30b of the upper base material 2 and the lower base material 3, respectively, and the corresponding beam portions 21 and 31 are provided. In the cargo handling pallet 1 in which the upper base material 2 and the lower base material 3 are assembled to each other, the girders 21 and 31 are bases that protrude from the opposing surfaces 20b and 30b of the upper base material 2 and the lower base material 3, respectively. The base portions 22 and 32, the convex portions 23 and 33 projecting from the abutting surfaces 22a and 32a of the base portions 22 and 32, and the concave portions on the same abutting surfaces 22a and 32a from which the convex portions 23 and 33 are projected. In the state where the upper base material 2 and the lower base material 3 are assembled, the convex portions 23 and 33 and the concave portions 24 and 34 of the corresponding girder portions 21 and 31 are fitted respectively. And the butted surfaces 22a and 32 of the base parts 22 and 32 Because There is contact, it can enhance the durability by increasing the strength of the joint of girder sections 21 and 31.

  That is, in the cargo handling pallet 1 of the present embodiment, since the girder portions 21 and 31 are provided with at least one convex portion 23 and 33 and concave portion 24 and 34 on the base portions 22 and 32, the upper base 2 In the state where the lower base material 3 is assembled, the convex portions 23 and 33 and the concave portions 24 and 34 are fitted to each other, so that at least two locations in addition to the contact portions of the butted surfaces 22a and 32a. The girder parts 21 and 31 are joined at the fitting positions of the convex parts 23 and 33 and the concave parts 24 and 34. As described above, the joint area of the beam portions 21 and 31 is increased by increasing the number of fitting portions of the convex portions 23 and 33 and the concave portions 24 and 34. As a result, the bonding strength of the beam portions 21 and 31 is increased. be able to.

  Therefore, the cargo handling pallet 1 of the present embodiment is a case where a large impact is applied to the cargo handling pallet 1 due to, for example, contact of claws of forklifts, collision between pallets, or dropping from a high place. In addition, it is possible to effectively prevent the occurrence of peeling or lateral displacement from the joint portion of the beam portions 21 and 31. Further, when a load is applied, for example, by placing a load on the cargo handling surface 20a of the upper base material 2, the whole or a part of the upper base material 2 and the lower base material 3 is bent or distorted. Combined stress is applied not only to stress in a certain direction such as the tensile direction, shearing direction, or torsional direction, but the strength of the joint portion of the spar portions 21 and 31 is increased. It exhibits excellent strength characteristics against such stress and can improve durability, load resistance, variability, and the like.

  In particular, in the girder portions 21 and 31, a pair of convex portions 23 and 33 and a pair of concave portions 24 and 34 are provided at symmetrical positions with respect to the central axis C orthogonal to the butting surfaces 22a and 32a of the base portions 22 and 32, respectively. Therefore, in a state where the upper base material 2 and the lower base material 3 are assembled, the contact portions of the butted surfaces 22a and 32a are fitted by fitting the pair of convex portions 23 and 33 and the pair of concave portions 24 and 34 together. In addition, the girder portions 21 and 31 can be joined at the fitting locations of the four convex portions 23 and 33 and the concave portions 24 and 34, and the strength of the joined portions of the girder portions 21 and 31 can be further increased. it can.

  Moreover, the upper base material 2 is opened to the cargo handling surface 20a formed on the opposite side of the facing surface 20b, and the convex portions 23 of the other upper base material 2 are fitted on the axis of the convex portion 23 of the girder portion 21. Since the possible insertion holes 26 are formed, when the plurality of upper base materials 2 are stacked on the cargo handling surface 20a, all or a part of the convex portions 23 of the girder portion 21 are inserted into the insertion holes 26 so that the upper base The loading height of the material 2 can be kept low, and more upper base materials 2 can be loaded and stored, and the carrying work in the loaded state can be facilitated to improve the work efficiency.

  Further, since the reinforcing rib 20c is extended on the opposing surface 20b, the upper base material 2 can improve the load resistance when a load is applied, for example, by placing a load on the cargo handling surface 20a. The bending and distortion of the base material 2 can be prevented. In particular, by extending the reinforcing rib 20c to the opposing surface 20b, the cargo handling surface 20a can be formed smoothly, and the work for unloading the load can be facilitated to improve the work efficiency.

  Moreover, since the girder parts 21 and 31 are formed in the same shape in the upper base material 2 and the lower base material 3, the stress described above is applied to the girder parts 21 and 31 evenly at the joint portions of the girder parts 21 and 31. Durability, load resistance, variability and the like can be further improved.

  Moreover, since the upper base material 2 and the lower base material 3 are formed in the same shape and constitute a double-sided pallet with the upper base material 2 and the lower base material 3 assembled, the upper base material 2 is formed with a single mold. And since the lower base material 3 can be shape | molded and an assembly operation can be simplified, a shaping | molding cost and a manufacturing cost can be reduced.

  In addition, as a structure of the pallet 1 for cargo handling, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  That is, in the above-described embodiment, the configuration in which the upper base material 2 and the lower base material 3 are formed in the same shape has been described. However, the configuration of the upper base material 2 and the lower base material 3 is not limited to this, and the upper base material 2 The material 2 and the lower base material 3 may be formed in different shapes. For example, instead of providing the pallet body 30 as a rectangular plate-like body formed in a square shape in plan view on the lower base material 3, a frame body formed in a square shape in plan view is used, It is good also as a structure in which the digit part 31 is provided.

  In the above-described embodiment, the configuration in which a plurality (nine) of the same shape is provided in each of the girder portions 21 and 31, but the arrangement configuration of the girder portions 21 and 31 is not limited thereto. For example, the shape of the girder parts 21 and 31 may be formed differently depending on the arrangement, and at least one of the girder parts 21 and 31 has at least one base part 22 or 32 as in the above-described embodiment. The convex portions 23 and 33 and the concave portions 24 and 34 may be provided, and the other portions may be formed differently.

  Further, in the above-described embodiment, the configuration in which the convex portions 23 and 33 are formed as cylindrical protrusions having a circular cross section has been described. However, the shape of the convex portions 23 and 33 is not particularly limited, and for example, the tip You may form so that it may be gradually diameter-reduced as it goes to. The same applies to the shapes of the recesses 24 and 34.

DESCRIPTION OF SYMBOLS 1 Pallet for cargo handling 2 Upper base material 3 Lower base material 4 Fork insertion part 20/30 Pallet body 20a / 30a Handling surface 20b / 30b Opposing surface 20c / 30c Reinforcement rib 21/31 Girder part 22/32 Base part 22a / 32a Butting surface 23/33 Convex part 24/34 Concave part 25/35 Spatial part 26/36 Insertion hole 27/27 Drain hole

Claims (5)

In the pallet for cargo handling in which a plurality of girders are respectively provided on the opposing surfaces of the upper base material and the lower base material, and the corresponding base portions are joined and the upper base material and the lower base material are assembled.
The girder is
A base portion projecting from the opposing surfaces of the upper base material and the lower base material;
A convex portion protruding from the abutting surface of the base portion;
A concave portion that is recessed in the same abutting surface where the convex portion protrudes; and
A concave portion provided in the same abutting surface provided with the convex portion and the concave portion, and
The girder portion is arranged such that the pair of convex portions and the pair of concave portions are symmetrical with respect to a central axis perpendicular to the abutment surface of the base portion, and are arranged at respective vertex positions of a square centering on the central axis. ,
A cargo handling pallet in which, in a state where the upper base material and the lower base material are assembled, a convex portion and a concave portion of a corresponding girder portion are respectively fitted, and a butting surface of the base portion is brought into contact.   The upper base material is opened in a cargo handling surface formed on the side opposite to the facing surface, and an insertion hole into which a convex portion of another upper base material can be inserted on an axis of the convex portion of the girder portion. The pallet for cargo handling according to claim 1 to be provided.   The cargo handling pallet according to claim 1 or 2, wherein a reinforcing rib is provided on the facing surface of the upper base material.   The cargo handling pallet according to any one of claims 1 to 3, wherein the upper base material and the lower base material are formed with the same girder portion in the same shape.   The said upper base material and the lower base material are formed in the same shape, and comprise a double-sided pallet in the state in which the said upper base material and the lower base material were assembled | attached. Pallet for cargo handling.

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