JP3684272B2 - palette - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pallet that is a loading platform used for storing and transporting cargo. Specifically, the present invention is lightweight; excellent in water resistance; surface is not easily damaged even when used for a long period of time; manufacturing pallets of various sizes in small amounts (hereinafter referred to as “manufacturing a small variety of products”). It also relates to a pallet having various properties such as being easy to rust; having no rust; and having a practical level of strength.
[0002]
[Prior art]
Conventionally, wooden pallets, synthetic resin pallets, metal pallets, and paper cardboard pallets are known and used as pallets.
[0003]
[Problems to be solved by the invention]
However, wooden pallets are heavy; they are poorly water resistant (meaning “easy to absorb water”) and are therefore unsuitable for use in cargo that does not like moisture; (It is easy to give up).
Synthetic resin pallets are heavy in weight; they require a mold to mold each type and size of pallet from molten resin, making it difficult to manufacture small-sized and multi-product pallets easily. have.
[0004]
Metal pallets are heavy in weight; since the parts that make up the pallet are made of metal, it is necessary to use a laborious method such as welding to join these parts. Variety of pallets is difficult to manufacture easily;
Paper cardboard pallets have the problem of poor water resistance; poor strength.
[0005]
The object of the present invention is lightweight; excellent in water resistance; hard to damage the surface even after long-term use; easy to produce a small variety of products; does not rust; has practically strong strength It is to provide a pallet having various characteristics such as.
[0006]
[Means for Solving the Problems]
The inventor does not have the above-mentioned problems that are known in the art, such as a wooden pallet, a synthetic resin pallet, a metal pallet, and a paper cardboard pallet. Excellent water resistance; hard to damage the surface even after long-term use; easy to manufacture a small variety of varieties; does not rust; I have been researching development. As a result, in the stacking section and the base section constituting the pallet, the bottom surface of the stacking section is made of a specific material, and the base section is made of a water-resistant plate-like material joined to at least the lower surface of the post. As a result, the present inventors have found that a pallet having the above-described various characteristics in a well-balanced manner can be obtained by solving the above-mentioned problems of known pallets, and the present invention has been completed.
[0007]
That is, the present invention is a pallet composed of a loading part and a base part joined to the loading part, and the loading part is formed of a thermoplastic resin with a bottom surface and a side surface connected to each other, and has a thickness of 1 to 15 mm. It consists of a plate, the side is bent with respect to the bottom, the corner is reinforced with a reinforcing tool, and the base is a hollow structure plate molded from a thermoplastic resin with a water resistance thickness of 1 to 15 mm into a square tube shape It is a pallet formed by forming a cylindrical article that is bent, and housing struts that are joined or in contact with the upper and lower surfaces and the side surface of the cylindrical article .
The “loading part” of the pallet in this specification means the part where the cargo to be stored or transported is in contact with the pallet, that is, the upper part of the pallet, and the “pedestal part” of the pallet is the pallet on which the cargo is loaded. Or when moving only a pallet with a forklift etc., it shall mean the part which inserts the part of the fork of a forklift, ie, the lower part of a pallet.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The pallet of the present invention will be described in detail below. However, when the present invention is described with reference to the drawings, the illustrated one is only an example of the pallet of the present invention, and the present invention is not limited to the illustrated one. Further, the drawings focus on drawing the present invention in an easy-to-understand manner, and the scale and the like do not necessarily reflect the actual ones accurately.
[0009]
FIG. 1 is a perspective view (FIG. 1A) of a pallet according to the present invention and a perspective view (FIG. 1B) showing an exploded state thereof. This pallet has a stacking unit 1 which is a dish-shaped object at the upper part of the pallet and three rectangular tube-shaped objects at the lower part of the pallet (the cylinder has a post made of a paper tube described later) The fork of the forklift is inserted between the cylindrical objects 3 constituting the base 2. The size of this pallet is about 1100 mm in length and width, and the total height is about 250 mm. In addition, although the base part 2 concerning the pallet of FIG. 1 is provided with three cylindrical objects 3, the cylindrical object is not limited to three and may be two depending on the use of the pallet. However, the number may be four or more.
[0010]
The loading part and the base part constituting the pallet are joined. The joining method is not particularly limited. For example, an umbrella nail (for example, an umbrella nail having a name “Triwall Nail” manufactured by Triwall Co., Ltd.), a stapler (stapler), a rivet, a stitch, a plastic bag, an adhesive, etc. Can be joined. The pallet in FIG. 1 is obtained by joining a loading portion 1 and a base portion 2 with umbrella nails.
[0011]
The parallel lines in the circles drawn on the bottom surface and side surface of the pallet stacking unit 1 in FIG. 1 (the bottom surface and side surface of the dish-shaped object) and the side surface of the base unit 2 (side surface of the cylindrical object) The direction of the rib of the hollow structure board (after-mentioned) shape | molded from the thermoplastic resin which is a raw material for manufacturing is shown.
The pallet stacking portion 1 in FIG. 1 is an integral product manufactured from a hollow structure plate, that is, the bottom and side surfaces of a dish-shaped object are connected to each other. Manufacturing by joining the bottom surface obtained by cutting (the bottom plate of the dish-shaped object) and four side surfaces (side surfaces of the dish-shaped object) obtained by cutting the hollow structure plate into a predetermined size. You can also. Here, when the stacking portion is manufactured by joining the bottom surface and the side surface, the material of the side surface is not limited to the hollow structure plate, and may be a synthetic resin sheet (described later). The method for processing the hollow structure plate will be described later.
[0012]
FIG. 2 is a perspective view showing the base part 2 of the pallet of FIG. 1 and its manufacturing process. However, FIG. 2 shows only one of the three cylindrical objects 3 constituting the base part 2 of FIG. 1 for convenience. The pedestal 2 is composed of a side plate 5 formed by bending a hollow structure plate into a rectangular tube shape, and a paper tube (described later) which is a column 6 existing inside the cylinder. The support 6 is for giving the base 2 strength (strength against the force from above the base). The number of paper tubes in the pedestal 2 in FIG. 2 is three per cylindrical one, but the number of paper tubes is not limited to three, and the use of pallets (especially the weight of cargo) Depending on the number, it may be two or more than three.
[0013]
The side plate 5 and the column 6 constituting the base part 2 are joined. The method for joining the side plate 5 and the column 6 is not particularly limited, and both can be joined by, for example, an umbrella nail, a stapler, a rivet, a stitch, a plastic bag, an adhesive, or the like. The side plate 5 and the column 6 of the pedestal 2 in FIG. 2 are joined by umbrella nails that are driven from above the side plate 5 toward the longitudinal direction of the column 6 (a direction perpendicular to the radial direction of the column 6).
[0014]
A hollow structural plate (for example, the bottom and side surfaces of the stacking portion 1 and the side plate of the base portion 2 in FIG. 1) molded from the thermoplastic resin according to the pallet of the present invention has a rib 7 as illustrated in FIG. It is a structural board. The hollow structure board is also called a plastic corrugated board (sometimes abbreviated as “plastic stage”), and is a known material. Examples of the thermoplastic resin for producing the hollow structure plate include polyethylene, polypropylene, a copolymer of ethylene and propylene, ethylene and / or propylene and, for example, butene-1, pentene-1, hexene-1, heptene-1, Examples include polyolefins represented by copolymers with α-olefins such as octene-1, nonene-1, 4-methylpentene-1, and decene-1, among which polypropylene, polyethylene, ethylene and propylene These copolymers are preferred. The thickness of the hollow structure board applied to the stacking portion of the pallet of the present invention is not particularly limited and may be appropriately determined according to the use of the pallet, but generally the thickness is 1 to 15 mm.
[0015]
Examples of commercially available hollow structure plates include Sunply (registered trademark) and Sumipanel (registered trademark) manufactured by Sumitomo Chemical Co., Ltd., which are molded from a thermoplastic polypropylene-based resin. You can get one. Incidentally, the hollow structural plate used in the stacking portion of the pallet in FIG. 1 is a Sumipanel (registered trademark) having a thickness of 9 mm.
[0016]
The hollow structure board is lightweight because it is a hollow structure having ribs formed from a thermoplastic resin; it is made of resin and has excellent water resistance; It is hard to be damaged; it is a hollow structure with ribs, so it is excellent in workability (easiness of cutting, bending, joining, etc.); Since it is a structural body, it is a material having the characteristics of excellent strength (particularly strong against the force of bending in a direction perpendicular to the direction of the ribs).
[0017]
Thus, since the hollow structural plate is a material having a characteristic that it is particularly strong against the force of bending in a direction perpendicular to the direction of the rib, the hollow structural plate is shown in FIG. 1 from the viewpoint of the strength of the pallet. It is preferable to use it in the direction of the rib. The reason why the direction of the rib on the bottom surface of the loading unit is orthogonal to the direction of the fork of the forklift is to prevent the bottom surface of the loading unit from being deformed (bent in an arc) when the pallet is lifted by the forklift.
[0018]
The paper tube which is an example of the material constituting the column of the pallet according to the present invention is a known material, and paper tubes manufactured by Showa Marutsu Co., Ltd. or Nippon Paper Tube Industry Co., Ltd. can be obtained. Since the paper tube is a cylindrical material manufactured by winding paper several times while firmly bonding between paper with an adhesive, it is particularly strong against the force from the longitudinal direction of the tube, In addition, moisture is not absorbed and the paper does not easily peel off.
[0019]
The shape of the post such as a paper tube according to the pallet of the present invention is not particularly limited, and may be appropriately selected according to the use of the pallet. As the shape of the paper tube, a round shape or a square shape is generally well known. Here, the square paper tube means not only those whose corners are correctly squared but also those that are rounded.
The size of the paper tube of the pallet of the present invention is not particularly limited, and may be appropriately determined according to the usage of the pallet. In general, in the case of a round paper tube, the diameter is 50 to 200 mm, the height is 30 to 200 mm, the wall thickness (the thickness in the radial direction of the multi-layer paper) is 5 to 50 mm. The length or width is 50 to 200 mm, the height is 30 to 200 mm, and the wall thickness (the thickness in the radial direction of the multi-layer paper) is 5 to 50 mm. The size of the paper tube of the base part in FIG. 1 is 110 mm in diameter, 90 mm in height, and 40 mm in thickness.
[0020]
FIG. 4A is a perspective view of another example of the column 8 according to the pallet of the present invention, and FIG. 4B is a plan view and a side view of a material for manufacturing the column 8. FIG. 4B shows the hollow structure plate cut to a predetermined size, and a buoy (V) -shaped groove (the groove is formed by pressing a V-shaped blade) in the plan view is bent. 4A can be obtained which is not easily deformed by the force from the vertical direction. Here, the two overlapping surfaces (the two surfaces on the left front side in FIG. 4A) may be joined with, for example, an umbrella nail, a stapler, a rivet, a stitch, a plastic bag, an adhesive, or the like.
[0021]
In order to manufacture the stacking portion and the base portion according to the present invention, a hollow structure having a rib formed from a thermoplastic resin must be bent in a direction parallel to the rib or in a direction perpendicular to the rib. A bending method will be described.
In order to bend the hollow structure plate in a direction parallel to the ribs, for example, the blade tip presses a U (U) or buoy (V) shaped blade on the line to be bent on the hollow structure plate, and the rib is formed on the hollow structure plate. Put U (U) or buoy (V) -shaped groove in parallel and fold the groove part by hand, or heat bar on the line to be bent on the hollow structure board (melt the part to be bent with heat) A heated rod-shaped jig for this purpose, which is a well-known jig), and then the portion may be bent by the force of a hand or the like. It is convenient to perform the bending when the heat is applied (when the portion to which the heat bar is applied is in a molten state) because the shape of the bent portion is fixed.
[0022]
In order to bend in the direction perpendicular to the rib, for example, a method of forming a groove with a blade such as a knife on a line to be bent on a hollow structure plate and bending the groove with a hand or the like, or hollow After applying the heat bar on the line to be bent on the structural plate, a method of bending the portion with a force such as a hand may be applied. The former folding method is a method that can be folded very easily, and the bent portion is sharply and beautifully finished. In the latter bending method, for the same reason as described above, it is advantageous to perform the bending when hot, because the shape of the bent portion is fixed.
[0023]
Especially when performing bending in the cold, since the shape of the bent portion has a movable without being fixed, for example, as the loading unit 1 of FIG. 1, was what end side adjacent ones dished with stiffeners 4 it may be reinforced, may be heat sealed was what end portion, also, was what end portion may be bonded with adhesive. Even when the bending is performed at the time of heating, such reinforcement, heat fusion, or adhesion may be performed. When manufacturing the side plate 5 of the pedestal 2 according to the manufacturing process of FIG. 2, from the viewpoint of the stability of the shape (square tube type) of the side plate 5, when bending is performed not only in the cold state but also in the hot state. in also preferred to joined if the end of the side plate 5 (overlapping portion) with an adhesive or the like.
[0024]
The material of the side plate of the base part of the pallet of the present invention is not limited to a hollow structure plate, but may be a water-resistant plate-like material that can be processed into a shape as shown in FIG. Examples of such materials include water-resistant paperboard and synthetic resin sheets, which may be known ones.
The synthetic resin for the synthetic resin sheet is not particularly limited as long as it can obtain a non-foamed or foamed sheet and can be joined to the support. Representative and preferred examples of the synthetic resin include polyolefin resins such as ethylene and propylene homopolymers and copolymers. Examples of the copolymer include copolymers of ethylene and / or propylene and α-olefins such as butene-1,4-methylpentene-1 and hexene. These polyolefin resins may be used alone or as a mixture.
[0025]
The synthetic resin sheet may be a sheet produced from a known synthetic resin by a known production method, and the sheet may be a non-foamed sheet or a foamed sheet. The foam sheet is preferable from the viewpoint of reducing the weight of the side plate and saving resources. The expansion ratio is preferably 2 times or less, and preferably 1.5 times or less, from the viewpoint of difficulty of damage to the side plate. As an example of the foam sheet, there may be mentioned Sumiceller (registered trademark) manufactured by Sumitomo Chemical Co., Ltd. having a foaming ratio of 1.3 times produced from a homopolymer of propylene.
[0026]
The thickness of the synthetic resin sheet is not particularly limited, but is generally 0.5 to 20 mm, preferably 3 to 15 mm.
Examples of the stacking unit and the base unit constituting the pallet of the present invention are shown below as a stacking unit and a base unit other than those shown in FIG. The pallet of the present invention can also be obtained by arbitrarily combining these stacking units and platform units.
[0027]
FIG. 5 is a perspective view of another example of the stacking unit 11. The stacking unit 11 is simply a single hollow structure plate cut to a predetermined size, and corresponds to the bottom surface of the stacking unit 1 of FIG. Here, the parallel lines described on the surface and the cut surface of the stacking portion 11 in FIG. 5 indicate the ribs of the hollow structure plate.
FIG. 6 is a perspective view of another example of the stacking unit 21. The stacking portion 21 is formed by bending a hollow structural plate cut into a shape as shown in FIG.
[0028]
FIG. 8 is a perspective view of another example of the base portion 22. The base 22 includes an upper plate 12, a lower plate 13, and nine round paper tubes 14 positioned between both plates. The upper plate 12 has nine punched holes, and the size of the hole is the size of the paper tube 14, that is, the size that the paper tube 14 just fits. The lower plate 13 has no holes. The lower surface of the paper tube 14 and the lower plate 13 may be joined by, for example, an umbrella nail, a stapler, a rivet, a stitch, a plastic bag, an adhesive, or the like. Also, the upper periphery of the paper tube 14 and the upper plate 12 are joined with an adhesive or the like, and the upper plate 12 and the bottom of the stacking portion are joined with an umbrella nail, a stapler, a rivet, a stitch, a plastic bag, an adhesive or the like. What is necessary is just to join. 8 has nine paper tubes 14. However, the number of paper tubes may be more or less than nine depending on the size and application of the pallet. Further, the paper tube may be of a square shape or may be replaced with the support 8 in FIG. 4A. 8 has two plates (upper plate 12 and lower plate 13), but in order to increase the strength of the base portion 22, a paper tube is fitted on the upper plate 12. One or more plates that do not have a hole to be stacked are joined together (not shown), or one or more plates having nine holes into which a paper tube is fitted are stacked on the lower plate 13 May be joined (not shown).
[0029]
FIG. 9 is a perspective view of another example of the base 32. The pedestal 32 includes three lower plates 23 and three round paper tubes 24 (a total of nine paper tubes 24) joined on each lower plate 23. In the case of FIG. 9 as well, the number of lower plates 23 and the type and number of paper tubes 24 can be changed as appropriate, and the paper tubes may be replaced with the columns 8 in FIG. 4A.
FIG. 10 is a perspective view of another example of the base part 42. This pedestal portion 42 is composed of a lower plate 33 and nine square paper tubes 34 joined on the lower plate 33, and is configured to omit the upper plate 12 of the pedestal portion 22 in FIG. 9 corresponds to the integrated lower plate 23 of the base 32 in FIG. Also in the case of FIG. 10, the type and number of the paper tubes 34 can be changed as appropriate, and the paper tubes may be replaced with the support columns 8 in FIG. 4A.
[0030]
Various types of pallets of the present invention can be obtained by arbitrarily combining the stacking portion (FIGS. 1, 5, 6) and the base portion (FIGS. 1, 8, 9, 10) exemplified above.
[0031]
【The invention's effect】
The pallet of the present invention is a pallet composed of a loading portion and a base portion joined to the loading portion, and the loading portion is a hollow having a thickness of 1 to 15 mm formed from a thermoplastic resin by connecting the bottom and side surfaces thereof. consists structural plate, bottom to side bending, it reinforces the corner with the brace, the base portion is hollow plate square tubular molded thickness of the water resistance of a thermoplastic resin 1~15mm It is light in weight because it is formed by forming a cylindrical object that is bent into a cylindrical shape, and housing struts that are joined to or in contact with the upper and lower surfaces and side surfaces of the cylindrical object . The surface is difficult to be damaged even when used for a long period of time; it is easy to manufacture a small variety of products; it does not rust; and has an effect of having a practically strong level.
[Brief description of the drawings]
1A is a perspective view of a pallet according to the present invention, and FIG. 1B is a perspective view showing an exploded state of the pallet of FIG. 1A.
2 is a perspective view showing a base part of the pallet in FIG. 1 and a manufacturing process thereof.
FIG. 3 is a perspective view of a hollow structure plate according to the present invention.
4A is a perspective view of another example of a column according to the pallet of the present invention, and FIG. 4B is a plan view and a side view of a material for manufacturing the column of FIG. 4A.
FIG. 5 is a perspective view of another stacking unit according to the pallet of the present invention.
FIG. 6 is a perspective view of still another loading unit according to the pallet of the present invention.
7 is a development view of the stacking unit of FIG. 6;
FIG. 8 is a perspective view of another platform according to the pallet of the present invention.
FIG. 9 is a perspective view of still another platform according to the pallet of the present invention.
FIG. 10 is a perspective view of still another platform according to the pallet of the present invention.
[Explanation of symbols]
1.11.21 ... Loading unit 2.22.32.42.
3 ... Cylinder type
4 ... Reinforcing tool
5 ... Side plate
6.8 ... post
7 ... Ribs
12 ... Upper plate
13.23 ... Lower plate 14, 24, 34 ... Paper tube

Claims (1)

A pallet consisting joined to the stacking section and the stacking section base portion, the loading unit is its bottom and side thickness molded from a thermoplastic resin connected a hollow structure plate of 1 to 15 mm, the bottom surface On the other hand, the side is bent, the corner is reinforced with a reinforcing tool, and the base is formed by bending a hollow structural plate formed from a thermoplastic resin having a water resistance thickness of 1 to 15 mm into a rectangular tube shape. A pallet in which a column is formed, and supports that are joined to or in contact with the upper and lower surfaces and the side surface in a cylindrical object .

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