JPH07237635A - Cardboard-made pallet and its assembly method - Google Patents

Abstract

PURPOSE:To obtain a lightweight, easy-to-carry and cheap cardboard-made pallet excellent in strength and rigidity, by a method wherein stringers, each consisting of a cardboard-made square pipe and a cardboard-made core having a trapezoid cross section and fitted in the cardboard-made square pipe, and arranged parallel at specified intervals, and cardboard-made panels are respectively attached on the top and bottom faces of the stringers. CONSTITUTION:A stringer 2 consists of a square paper pipe 3 and a trapezoid core 4 fitted in the square paper pipe 3. The square paper pipe 3 is produced by forming a sheet of cardboard into a square pipe, and the trapezoid core 4 has the same length as the square paper pipe 3. An upper side 4a of the core 4 comes in contact with the widthwise middle part of an upper side 3a of the square pipe 3, and left and right sides 4b are bent and diverged downward from the upper side 4a so that lower ends 4c come in contact with the insides of lower left and right corners 3b of the square paper pipe 3. To produce a pallet 1, square top and bottom panels 5a and 5b of cardboard are respectively attached on the top and bottom faces of the stringers 2. By this constitution, a high-strength, cheap, lightweight and easy-to-carry pallet can be produced using a cardboard material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet on which materials, parts or the like are placed to facilitate transportation by a forklift, and more particularly to a paperboard pallet and an assembling method thereof.

[0002]

2. Description of the Related Art As a conventional pallet, a plurality of timbers are arranged in parallel at a predetermined interval, and wooden pallets in which plate materials are nailed to the upper and lower surfaces of these timbers, or the upper and lower surfaces of a frame bent in a groove shape. There was a metal pallet in which metal plates were fixed by welding.

[0003]

The wooden pallet is heavy in weight and requires labor to carry. The presence of knots makes the strength and stiffness unstable. There are drawbacks such as an increase in consumption of valuable forest resources and an increase in material costs. In addition, the metal pallet increases in weight and becomes difficult to carry, and rust causes stains on the mounted object. There are drawbacks in that it requires time and labor for processing and becomes expensive. SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel paperboard pallet and a method of assembling the pallet, which solves the above drawbacks.

[0004]

The present invention is configured as follows in order to achieve the above object. That is, a crosspiece formed by fitting a mountain-shaped core body made of a bent paperboard into a square-shaped paperboard tube formed in the shape of a rectangular tube is provided, and the mountain-shaped core body is formed with a small upper side and The inner edge of the square paper tube is brought into contact with the inner surface of the central portion in the width direction, and both left and right sides are gradually expanded downward so that the lower ends thereof are brought into contact with the inner surfaces of the right and left corner portions of the lower portion of the square paper tube. It is arranged such that they are arranged in parallel at intervals, and face plates formed in a rectangular shape by a paperboard material are fixed to the upper and lower surfaces of each crosspiece. In addition, the bars are arranged in parallel at a predetermined interval, square face plates made of paperboard material are placed on the upper and lower surfaces of each bar, and a slender base metal is fitted over the entire length of the bars. , Driving a stitch needle from the outer surface side of the face plate toward the base metal, penetrating the needle portion of the stitch needle into the overlapping portion of the face plate, square paper tube and chevron core, and then bending along the surface of the base metal It is configured.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is an enlarged front view of a main part thereof. In FIG.
Reference numeral 1 denotes a pallet made of paperboard material, in which rectangular bars 2 elongated in the front-rear direction are arranged in parallel at predetermined intervals in the left-right direction, and square face plates 5 are integrally formed on the upper and lower surfaces of each bar 2. It will be fixed to.

The crosspiece 2 is formed by fitting a chevron core 4 into a square paper tube 3, and the square paper tube 3 is made of a paperboard material having a thickness of about 3 mm as shown in FIGS. 2 and 3. Width W1 and height H1
Is about 77 mm and the length L1 is about 860 mm, and the chevron-shaped core body 4 is made of a paperboard material having a thickness of about 3 mm to form the square paper tube 3 as shown in FIGS. 2 and 4. The width W2 of the upper side 4a is made equal and the width W2 of the upper side 3a is set to about 20 mm.
The left and right sides 4b, 4b are bent downward from the upper side 4a, and the lower ends 4c, 4c are gradually expanded downward so that the lower ends 4c, 4c are lower than the square paper tube 3 The inner surfaces of the left and right corners 3b, 3b are brought into contact with each other.

A face plate 5 (top plate 5a, bottom plate 5b) formed in a rectangular shape (rectangular or square) by a paperboard material having a thickness of about 4 mm is fixed to the upper and lower surfaces of the crosspiece 2 and the pallet 1 as shown in FIG. To form. The crosspiece 2 and face plate 5 (top plate 5a,
The lower plate 5b) is assembled as follows. First, the three crosspieces 2 are arranged at the left and right ends of the lower surface of the upper surface plate 5a and the central portion in the left and right direction. Then, as shown in FIG. 5, a metal material is used to form an upper base metal 7a having a small width on the upper side and a lower metal base 7 having a wide width on the lower side.
Forming an e-shaped slender base metal 7 having b, the base metal 7 is fitted over the entire length of the crosspiece 2 as shown in FIG. 6, and the inverted U-shaped stitch needle 6 is attached by the stitcher to the top plate 5a. Drive from the upper surface side of the base metal toward the upper base metal 7a of the base metal 7,
The tooth portion 6a of the stitch needle 6 is penetrated through the upper surface plate 5a, the upper side 3a of the square paper tube 3 and the upper side 4a of the chevron core 4, and then bent along the surface of the upper base metal 7a of the base metal 7, The upper plate 5a is integrally connected (assembled) to the crosspiece 2 by.

Next, the upper plate 5a and the bar 2 which are connected to each other are turned upside down so that the lower side 3c of the square paper tube 3 faces upward, the lower plate 5b is placed on the lower side 3c, and the base metal is placed inside the bar 2. 7 is turned upside down and fitted, and in this state, the reverse U-shaped stitch needle 6 is moved by the stitcher in the same manner as described above.
From the side toward the lower support 7b of the base metal 7, and the tooth portion 6a of the stitch needle 6 is attached to the lower surface plate 5b and the lower side 3 of the square paper tube 3.
After passing through c, it is bent along the surface of the lower support 7b of the base metal 7, thereby integrally connecting the lower surface plate 5b to the crosspiece 2. The square paper tube 3, the chevron-shaped core body 4, and the face plate 5
The plate thickness and size of the above, and the interval between the crosspieces 2 are appropriately set depending on the weight and size of the placed object.

In addition, according to the present invention, a plurality of the base metals 7 described above are arranged in parallel at predetermined intervals, and each base metal 7
One end of each of the bars is supported by a frame in a cantilever manner, the bars 2 are inserted into the base metal 7 from the other end side, and the upper and lower plates 5a and 5b are brought into contact with the upper and lower surfaces of the bars 2, respectively. The inverted U-shaped stitch needles 6 may be simultaneously driven from the outer surfaces of the face plate 5a and the lower face plate 5b toward the upper and lower receiving members 7a and 7b of the base metal 7 by a stitcher. In this way, the pallet 1 can be assembled quickly.

According to the above-described embodiment, since the pallet 1 is made of paperboard, the material cost is reduced and the weight is reduced, so that it is easy to carry. Further, since the upper side 4a of the chevron-shaped core body 4 is in surface contact with the center portion in the width direction of the upper side 3a of the paper tube 3, the upper side 3a is stably supported and the slender base metal 7 can be inserted. Therefore, the connection (assembly) with the stitch needle 6 can be easily performed. Further, the right and left sides 4b, 4b of the chevron-shaped core body 4 are splayed downward, and their lower ends are in contact with the inner surfaces of the left and right corner portions 3b, 3b below the square paper tube 3, so that the square paper tube 3 is prevented from being deformed in the left-right (horizontal) direction, and the load in the vertical direction is satisfactorily taken care of.

[0011]

As is apparent from the above description, according to the present invention, a pallet having high strength can be formed by a paperboard material, which is inexpensive, lightweight and easy to carry. Costs can be significantly reduced especially for items that cannot be collected, such as for export. In addition, since it can be formed of recycled paperboard, it has the effect of enabling effective use of forest resources.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of a main part of FIG.

FIG. 3 is a perspective view of a square paper tube.

FIG. 4 is a perspective view of a chevron core.

FIG. 5 is a perspective view of a base metal.

FIG. 6 is a perspective view of an assembled state.

[Explanation of symbols]

 1 Pallet 2 Crosspiece 3 Square paper tube 3a Upper side 3b Lower side 4 Mountain core 4a Upper side 4b Left and right sides 5 Face plate 5a Top plate 5b Bottom plate 6 Stitch needle 6a Needle part 7 Base metal 7a Top receiver 7b Bottom receiver

Claims (2)

[Claims] 1. A crosspiece formed by fitting a mountain-shaped core body made of a paperboard bent into a mountain shape in a rectangular paperboard tube made of a paperboard, the mountain-shaped core body having a narrow upper side. Formed and abutted on the inner surface of the central portion of the square paper tube in the width direction, the left and right sides are gradually expanded downward and the lower ends thereof are abutted on the inner surfaces of the left and right corner portions of the lower paper tube, A paperboard pallet characterized in that crosspieces are arranged in parallel at predetermined intervals, and square face plates made of paperboard material are fixed to the upper and lower surfaces of each crosspiece. 2. A crosspiece formed by fitting a mountain-shaped core body made of a paperboard bent into a mountain shape is provided in a rectangular paperboard tube made of a paperboard, and the mountain-shaped core body has a narrow upper side. Formed and abutted on the inner surface of the central portion of the square paper tube in the width direction, the left and right sides are gradually expanded downward and the lower ends thereof are abutted on the inner surfaces of the left and right corner portions of the lower paper tube, The crosspieces are arranged in parallel at predetermined intervals, and a square face plate made of a paperboard material is placed on the upper and lower surfaces of each crosspiece, and a slender base metal is fitted over the entire length of the crosspiece to form the face plate. After driving the stitch needle from the outer surface side toward the base metal, penetrating the needle portion of the stitch needle into the overlapping portion of the face plate, square paper tube and chevron core, bend it along the surface of the base metal. A characteristic method for assembling a paperboard pallet.