JP2000043870A - Light-weighted aluminum pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aluminum pallet which is excellent in multi-stage stackability and transportability by reducing a weight of an aluminum pallet while various characteristics of the aluminum pallet such as a light weight and strength can be maintained. SOLUTION: Aluminum beam materials 2 are arrayed, and an upper face deck 3 is formed by aluminum deck boards 7 placed orthogonally to the beam materials 2, wherein these members are welded at contact parts to assemble a box-structured aluminum pallet 1a. At least an inner beam material 5 among the aluminum beam materials 2 comprises an aluminum section having an I- beam shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet made of aluminum alloy which achieves a lighter weight, and more particularly to an aluminum pallet which is excellent in flexibility in a longitudinal direction of a pallet when a load is placed.

[0002]

2. Description of the Related Art As is well known, in place of conventional pallets made of wood, resin, iron, etc., aluminum alloy pallets using JIS 6000 or other aluminum alloy molds, plates, bars, etc. Aluminum pallets)
Is widely used for transporting, storing, or transporting articles in distribution or distribution.

[0003] These aluminum pallets have a wide variety of structures due to the variety of uses, requirements and specifications of the pallets. However, basically, aluminum decks are arranged on an aluminum deck board. Arranged to form an upper deck, and if necessary, an aluminum deck board is arranged below the girders to form a lower deck, and the contact parts between these members are welded or fastened with bolts and nuts etc. The whole structure is box-shaped. Among these aluminum pallets, for example, aluminum pallets having a box-shaped structure formed by combining extruded aluminum hollow mold members having a rectangular cross section (hereinafter simply referred to as a rectangle) and joining them by welding are manufactured. It is advantageous in terms of process, manufacturing cost, and weight reduction, and is becoming mainstream among aluminum pallets.

As a typical example of an aluminum pallet using this hollow aluminum material, as shown in FIG. 3 (a), an aluminum hollow pallet 6 having a rectangular cross section (hereinafter simply referred to as a rectangle) is used as an aluminum pallet 1d. On the girder 2 lined up at intervals,
Similarly, a rectangular aluminum hollow member 7 is disposed orthogonal to the beam 2 to form an upper deck 3, and a rectangular aluminum hollow member 8 is disposed orthogonal to the beam 2 to form a lower deck 4. And a basic structure in which the contact portions (corner portions) of the aluminum hollow members 6, 7, 8 are welded to form a skid type.

As another mode, as shown in FIG. 3 (b), a type such as an aluminum pallet 1e having no lower deck 4 but only the upper deck 3 is often used.

As shown in FIGS. 3A and 3B,
Pallets assembled by welding rectangular aluminum hollow members are lighter in weight than wooden pallets made of resin, iron, or other solid materials or aluminum pallets assembled with fasteners. Superior to wooden and resin pallets in that there is no danger of fire,
It is more durable and does not crack, debris, or rust, and is superior to wooden, resin, and iron pallets.It is not charged like a resin pallet and does not attract dust. (Recycling) is possible. In addition to the corrosion resistance of the base aluminum alloy itself, it has the advantage that it is superior to cleaning pallets and disinfectants, and is superior to wooden and resin pallets.

In addition, the aluminum pallet has a complicated shape and structure that is resistant to a cleaning solution and a disinfectant, and has irregularities, protrusions, or liquid pools on the surface or in the space, in combination with the corrosion resistance of the aluminum alloy itself as a base material. It has a relatively simple and smooth surface and a welded structure, and has the advantage that the entire pallet can be washed uniformly and used repeatedly. Therefore, it is particularly suitable for fields requiring sanitary control, such as the pharmaceutical, food or cosmetic industries. Therefore, aluminum pallets have recently been widely used in various fields such as warehouses for storing articles such as raw materials, materials and products.

In particular, an aluminum pallet made of an aluminum hollow material as shown in FIG. 3 (a) is made as thin as not more than 4 mm in thickness for the purpose of weight reduction. Satisfies JIS Z0605, a standard for pallets, especially strength standards. More specifically, the compressive strength of the pallet is 2 mm or less in strain, the bending strength is 1% or less in flexure,
It has a characteristic of 0.3% or less in residual deflection rate.

[0009]

Generally, in a warehouse for storing articles, it is necessary to carry out an aluminum pallet loaded with loads (loading articles) by a forklift, a crane, or the like, or to carry the work by a conveyor. Become. Further, it is necessary to store the aluminum pallets loaded with the load in a multi-tiered manner such that the aluminum pallets themselves are stacked in multiple stages, or to stack the aluminum pallets themselves loaded with the loads in multiple stages and perform the work by the transport means for unloading and unloading. (Hereinafter, these operations are simply referred to as stacking operations). 2. Description of the Related Art In recent years, the stacking work in a warehouse or the like for storing these articles tends to be more and more mechanized or automated, thereby increasing the efficiency. Therefore,
For aluminum pallets used in such applications, it is possible to reduce the weight while maintaining the conventional strength,
Strongly required.

However, when the weight of the aluminum pallet itself is further reduced, the thickness of the member such as the hollow mold member already constituting the aluminum pallet is reduced to 4 mm or less due to the weight saving efforts from the past. Further, there is a limit to further reducing the thickness in order to maintain the strength.

Further, the number and width of the hollow pallets and the like constituting the aluminum pallet can be reduced by maintaining the strength or securing the surface area of the deck.
There are limits to maintaining the above properties of aluminum pallets.

Accordingly, an object of the present invention is to provide a shape of a member constituting an aluminum pallet, particularly for a warehouse for storing articles, while maintaining various characteristics such as weight reduction and strength of the aluminum pallet. The purpose of the present invention is to provide an aluminum pallet that is lighter in weight and has excellent stacking and transport properties.

[0013]

In order to achieve this object,
The lightweight aluminum pallet of the present invention is a box formed by arranging aluminum girders in a row, forming an upper deck by an aluminum deck board disposed orthogonal to the girders, and welding a contact portion between these members. An aluminum pallet having a mold structure, wherein at least the hollow member of the aluminum bars is an I-beam shaped aluminum member.

Further, in order to further reduce the weight of the aluminum pallet, the above-mentioned aluminum beams are selected from the group consisting of aluminum beams.
It is preferable that the aluminum girder forming the side surface of the aluminum pallet is an aluminum hollow mold having a rectangular cross section, and it is more preferable that the aluminum girder is an aluminum mold having an I-beam shape.

Further, in order to further reduce the weight of the aluminum pallet, it is preferable that the aluminum deck board including the edge board is made of a hollow aluminum material having a rectangular cross section.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are shown in FIGS.
(b) will be described below with reference to FIG. FIG. 1A is an overall perspective view of a lightweight aluminum pallet 1a according to one embodiment of the present invention, and FIG. 1B is an overall perspective view of a lightweight aluminum pallet 1b according to another embodiment of the present invention. FIG. 2 is a front view of a lightweight aluminum pallet 1c according to another embodiment of the present invention. First,
1A and 1B, the basic structure of the aluminum pallets 1a and 1b is basically the same as the conventional aluminum pallets 1d and 1e of FIG. That is, a rectangular aluminum hollow member 6 is arranged at predetermined intervals on a beam 2, and a rectangular aluminum hollow member 7 is also arranged as a deck board and an edge board at right angles to the beam 2. Construct Deck 3,
The aluminum pallet 1a of FIG. 1 (a) further comprises a rectangular aluminum hollow material 8 as a deck board and an edge board, which is arranged orthogonally to the beam 2 to form a lower deck 4, and aluminum hollow materials 6, 7 , 8 has a basic structure in which the contact parts (corner parts) are welded together and the whole is assembled into a skid type (box type).

Here, the most characteristic configuration of the lightweight aluminum pallet of the present invention is that the hollow member 5 in FIGS. 1 (a) and 1 (b) is an I-beam-shaped aluminum material. By using an I-beam shaped aluminum material instead of the aluminum hollow material shown in Fig. 3 as the hollow member, less aluminum material is required than using the aluminum hollow material, and the rigidity of the aluminum pallet is reduced. In addition, the weight can be further reduced while maintaining the same level as the conventional aluminum pallet shown in FIG.

The rigidity and bending resistance in the longitudinal direction of the pallet, particularly in the vertical direction, depend on the thickness of the material at the portion of the I-beam-shaped aluminum mold member 5 away from the central horizontal axis x shown in FIG. The larger the number, the larger the second moment of area and the higher. In this regard, if the thickness of the T-shaped end portions 5a to 5b of the I-beam-shaped aluminum member 5 is made relatively large, it is the same as the aluminum hollow member, and less aluminum is used than the aluminum hollow member. Thus, rigidity and bending resistance in the longitudinal direction of the pallet, particularly in the vertical direction, are ensured.

Furthermore, particularly when an I-beam shaped aluminum mold is used, there is no enclosed space like a rectangular aluminum hollow mold. As described above, there is no possibility that water or the like accumulates in the closed space, and there is an advantage of being sanitary.
Because of this, like the pharmaceutical, food or cosmetic industries,
Particularly suitable for areas requiring sanitary management.

Next, FIG. 2 shows an example in which the aluminum beams are all I-beam-shaped aluminum members, including the aluminum beams constituting the side surfaces of the aluminum pallet. The other structure of the aluminum pallet 1c in FIG. 2 is basically the same as that of the aluminum pallet 1a in FIG. 1 described above. Similarly, a rectangular aluminum hollow member 7 is arranged as a deck board and an edge board at right angles to the above-mentioned girder to form the upper deck 3, and further, the rectangular aluminum hollow member 8 is used as a deck board and an edge board. The lower surface deck 4 is arranged orthogonally to the base member, and has a basic structure in which the entire portion is assembled into a skid type (box type) by welding the contact portions between the aluminum members.

As shown in FIG. 2, all of the aluminum girder, including the aluminum girder constituting the side surface of the aluminum pallet, are made of I.
By using a beam-shaped aluminum material, the weight can be further reduced as compared with the case of FIG. 1, and the advantage in terms of sanitary management is further increased. As in the case of FIG. 1, when the thickness of the hollow aluminum material constituting the aluminum pallet or the thickness of the I-beam is reduced to 4 mm or less, FIG.
Similar to the conventional aluminum pallet shown in (b),
It can satisfy JIS Z0605, which is the standard for flat metal pallets, especially the strength standard. More specifically, the compressive strength of the pallet can satisfy a strain amount of 2 mm or less, a bending strength of 1% or less in a deflection rate, and a residual deflection rate of 0.3% or less.

Further, in the example of FIG. 2, the upper end 9a of the I-beam-shaped girder 9 has a T-shape, on which the ends of the deck board to the edge board 7 constituting the upper deck are attached.
Since each is mounted and supported, spot welding is performed by sandwiching the upper end 9a of the beam 9 and the end (hollow portion) of the deck board or the edge board as shown by a dotted line a in FIG. This makes it possible to reduce the number of welding steps and reduce costs. In addition, by forming each member of these aluminum pallets of the present invention as an extruded material by extrusion, a member having accurate shape and homogeneity can be obtained, and the aluminum pallet can be formed as compared with other processing methods. Can be reduced in manufacturing cost.

In a case where the aluminum pallets are conveyed in a warehouse with a belt conveyor or a chain conveyor or the like with or without the stacking operation, the aluminum pallets may be placed below the girder. The lower deck is constituted by an aluminum deck board disposed orthogonally to the girders, so that a wide contact surface with the conveyor can be formed, and conveyability by the conveyor can be improved.
An embodiment as shown in FIG. 1 (a) or FIG. 2 is preferable.

Further, I used for the aluminum pallet of the present invention
Other than the beam-shaped girder, the girder, deck board, and the shape of the aluminum member such as an edge board do not reduce the strength of the aluminum pallet and also do not impair the weight reduction, and various solid-type materials, Hollow materials can be used. However, in terms of securing strength and achieving weight reduction,
It is preferable to use the rectangular hollow mold or the I-beam mold described above.

The material of the aluminum alloy used in the aluminum pallet of the present invention is a structural material or a welded structural material. Need to be excellent. Therefore, Al alloys suitable for this purpose include, as basic properties, mechanical properties such as strength and proof stress, workability such as extrudability into I-beam shaped molds and rectangular aluminum hollow molds, weldability, and corrosion resistance. It is preferable to have Specifically, among Al alloys,
Especially JIS 6000 series such as JIS 6061, 6N01, 6063, 6151, etc. are preferable, JIS 5052, 5652, 5154, 5254, 5454, 5083,
JIS 5000 series such as 5086, 5456, JIS 7001, 7N01, 7003,
JIS 7000 series Al alloys such as 7050, 7072, and 7075 can also be used as appropriate.

According to these examples of the present invention, FIG.
Compared to the conventional aluminum pallet of the same type and condition shown in FIG.
In the case of (a) and (b), it is about 8/10, and in the case of FIG.
The weight can be reduced.

[0027]

According to the present invention, while maintaining various characteristics such as weight reduction and strength of an aluminum pallet, particularly for a warehouse for storing articles, the shape of the members constituting the aluminum pallet is improved. In addition, it is possible to provide an aluminum pallet that is lighter in weight and has excellent stacking properties and transportability. Furthermore, as in the pharmaceutical, food or cosmetic industries,
In particular, the application of aluminum pallets to fields requiring hygiene management can be expanded.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a lightweight aluminum pallet according to the present invention. FIG. 1 (a) is an overall perspective view of a pallet 1a, and FIG. 1 (b) is an overall perspective view of a pallet 1b.

FIG. 2 is a front view of a pallet 1c showing another embodiment of the lightweight aluminum pallet of the present invention.

FIG. 3 is an overall perspective view showing a conventional general aluminum pallet.

[Explanation of symbols]

1a ~ 1e… Aluminum pallet 2… Girder 3… Top deck 4… Bottom deck 5… I beam 6… Aluminum hollow mold 8… Aluminum hollow mold 8… Aluminum hollow mold 9… I beam

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiji Exit 4-4-27 Meiji Station, Nakamura-ku, Nagoya City, Aichi Prefecture Kobe Steel, Ltd. Nagoya Branch Office (72) Inventor Takeshi Hasegawa Hatchobori, Naka-ku, Hiroshima-shi, Hiroshima No. 16-11 F-term in the Kobe Steel, Ltd. China Branch (reference) 3E063 AA03 AA04 BA03 CA05 CA09

Claims (9)

[Claims] 1. A box-shaped structure in which aluminum girders are arranged side by side, an upper deck is constituted by an aluminum deck board arranged orthogonally to the girders, and a contact portion between these members is welded and assembled. A lightweight aluminum pallet comprising: an aluminum beam having an I-beam shape in at least a hollow member of the aluminum beams. 2. The lightweight aluminum pallet according to claim 1, wherein, among the aluminum beams, the aluminum beams constituting the side surfaces of the aluminum pallet are hollow aluminum members having a rectangular cross section. 3. A lightweight aluminum pallet according to claim 1, wherein said aluminum girders are all I-beam shaped aluminum members. 4. The lightweight aluminum pallet according to claim 1, wherein the aluminum deck board is a hollow aluminum material having a rectangular cross section. 5. The lightweight aluminum pallet according to claim 1, wherein a lower deck is constituted by an aluminum deck board disposed orthogonally to said girder under said girder. 6. The lightweight aluminum pallet according to claim 1, wherein the thickness of each aluminum member is 4 mm or less. 7. The lightweight aluminum pallet according to claim 1, wherein each of the aluminum members is an extrusion member. 8. The lightweight aluminum pallet according to claim 1, wherein each of the aluminum members is made of a JIS 6000 series aluminum alloy. 9. The method according to claim 1, wherein the aluminum pallet has a compressive strength of 2 mm or less in terms of strain, a flexural strength of 1% or less in deflection rate, and 0.3% or less in residual deflection rate. Lightweight aluminum pallets.