JPH0715541U - Load receiving member, pallet and paper tube - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a load receiving member, a pallet and a paper tube which have high strength and high productivity. [Structure] The liner 11 is provided on at least one surface of the corrugated plate 11a.
The rectangular corrugated cardboard 11 to which b is fixed is wound in a spiral shape a plurality of times to form a cylindrical shape, and the superposed surfaces of the corrugated board 11 forming this cylindrical shape are bonded to each other. When the load receiving member 10 is used so as to receive the load of the load in the axial direction, the compressive strength, the second moment of area and the bending rigidity of the load receiving member 10 are significantly increased. The corrugated board 11 can be manufactured by winding the corrugated board 11 in a cylindrical shape while applying an adhesive on one side thereof, and the workability is extremely good.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a load receiving member, a pallet, and a paper tube that use cardboard as a material.

[0002]

[Prior art]

 Conventionally, corrugated cardboard is light in weight but strong in strength and absorbs impact force. Therefore, as shown in FIG. 9, in addition to the box, the upper plate (2) and pallet (1) of the pallet (1) It is used as a constituent material of the girder material (3) (see Japanese Utility Model Laid-Open No. 62-14673). In particular, corrugated cardboard, unlike cardboard, has the advantage that it is extremely easy to recycle and has excellent recyclability.

[0003]

[Problems to be solved by the device]

 However, it cannot be said that the load-bearing members made of corrugated board, which are used for the girder material (3) of conventional pallets, make full use of the mechanical properties and workability of corrugated board. It lacks strength, or has low productivity. For example, the load receiving member as the girder material (3) in FIG. 9 has only a small moment of inertia of section and bending rigidity, since a plurality of rectangular corrugated cardboards are simply superposed and bonded to each other. In addition, since the overlapped part of multiple corrugated boards is the bottom ground contact surface, each corrugated board is peeled and opened, and water or the like easily enters between them, which is not only low in durability but also easy to remove. Therefore, edge processing is required. Moreover, in production, a plurality of rectangular corrugated cardboards must be stacked one on top of another and bonded together, resulting in low productivity.

Therefore, the present invention has a technical object to provide a load receiving member, a pallet, and a paper tube which have high strength and high productivity.

[0005]

Means for Solving the Problems The present invention is, as a means for achieving the above object, a rectangular corrugated cardboard having a liner fixed to at least one surface of a corrugated plate, which is wound in a spiral shape a plurality of times to form a cylinder. In addition to being formed in a shape, the overlapping surfaces of the corrugated cardboard forming the cylindrical shape are joined to each other.

Further, the corrugated plate at the outermost end of the corrugated board is removed with a predetermined width in the winding direction, and the liner at the portion where the corrugated plate is removed faces the inner side of the liner. It is preferable to use a joined structure.

Further, both ends of the load receiving member in the axial direction of the cylindrical shape can be fixed to the upper plate and the lower plate of the pallet to form the pallet.

Furthermore, by forming the load receiving member to be long in the axial direction, it can be used as a paper tube.

[0009]

[Action]

 According to the first aspect of the present invention, the rectangular corrugated board is spirally wound a plurality of times to form a cylindrical shape, and the overlapping surfaces of the corrugated board in the radial direction of the cylindrical shape are joined to each other. When it is used so as to receive a load, the compressive strength, the second moment of area and the bending rigidity of the load receiving member are significantly increased. Therefore, it is possible to obtain a lightweight and strong load receiving member. In addition, it can be manufactured by rolling the corrugated board in a cylindrical shape while applying an adhesive to one side of the corrugated board, so the workability is extremely good.

According to the second aspect of the present invention, the corrugated board at the outermost end of the corrugated board is removed with a predetermined width in the winding direction, and the liner at the part where the corrugated board is removed is joined to the liner facing inward. In addition, a separate adhesive member for treating the final winding end such as gum tape is not required, and since only the liner is joined, good adhesive strength can be obtained. Further, since the liner contributes as a part of the strength member, the compressive strength and bending strength of the load bearing member are improved as compared with the case where the gum tape is used.

Such a load receiving member is used as a part of the pallet by fixing both axial ends to the upper and lower plates of the pallet so as to receive the load of the load in the axial direction of the cylinder, or It can be used as a paper tube. The load receiving member described above can also be used as a load receiving member having a transverse cross section that is arcuate by being divided into a plurality of parts along a dividing surface that includes the axis thereof.

[0012]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a perspective view of the load receiving member 10, in which a rectangular corrugated cardboard 11 is a single-sided corrugated board in which a liner (flat paper material) 11b is fixed to one side of a corrugated plate 11a with an adhesive. It is spirally wound a plurality of times to form a cylindrical shape.

In the load receiving member 10, the corrugated plate 11a at the winding start end of the corrugated cardboard 11 is removed by a certain width in the winding direction, and the start end portion S1 of the liner 11b excluding the corrugated plate 11a is removed. , Which is bonded to the cylindrical core tube 12 made of paper thicker than the liner 11b with glue or other adhesive, and the corrugated plate 11a is directed inward, and the corrugated plate 11a is glued or otherwise. By winding the corrugated board 11 in a spiral shape while applying the adhesive, the superposed surfaces of the corrugated board 11 forming the cylindrical shape are joined to each other. Similarly to the winding start end, the corrugated plate 11a is also removed from the outermost winding end of the corrugated board 11 by a certain width in the winding direction, and the corrugated plate 11a is excluded from the end portion of the liner 11b. S2 is joined to the liner 11b facing inward.

When manufacturing the load receiving member 10, the corrugated cardboard 11 is preliminarily cut into a rectangular shape having a width corresponding to the length H of the load receiving member 10 in the axial direction A, as shown in FIG. At this time, the direction orthogonal to the longitudinal direction R of the corrugated board 11, that is, the axial direction A of the load receiving member 10 is aligned with the ridge line B of the corrugated plate 11a. The load receiving member 10 is manufactured by winding the corrugated board 11 from one end as shown by an arrow P.

As another manufacturing method, as shown in FIG. 3, a rectangular corrugated cardboard 11 having a width that is an integral multiple (4 times is shown) of the length H in the axial direction A is used. A core tube 12 having a length equal to the width may be wound into a cylindrical shape as a core material and bonded together, and then cut into predetermined lengths H as indicated by a chain line. Can be increased.

In the load receiving member 10 described above, for example, both ends 10a and 10b in the axial direction A are adhered to the upper plate 13a and the lower plate 13b of the pallet 13 shown in FIGS. 4 (a) and 4 (b). , Receives the load of luggage (not shown) in the axial direction A. The upper plate 13a and the lower plate 13b of the pallet 13 are made of, for example, double-sided corrugated board. Further, the upper plate 13a and the lower plate 13b of the pallet 13 and the outer surface of the load receiving member 10 are waterproofed if necessary.

Next, an apparatus used for manufacturing the load receiving member 10 will be described with reference to FIG. A long corrugated paper roll 14 having a predetermined width and wound around a winding shaft 15 shown at the right end is unwound by a pair of unwinding rollers 16 and 16 and is conveyed with the corrugated plate 11a facing upward. It is supplied onto the belt conveyor 17. The raw fabric 14 is formed by gluing the liner 11b on one surface of the corrugated plate 11a, and at this time, it is constant for each length L necessary for winding and forming one load receiving member 10. The width (for example, about 50 to 150 mm) is provided with a non-glued portion. The unrolled corrugated cardboard fabric 14 is stocked in a wavy shape due to the stagnation of the feeding between the unwinding roller 16 and the constant speed feeding roller 18 which rotates at a constant speed lower than the unrolling roller 16. Be done.

Then, the unwound corrugated board stock 14 is removed by the three conveyor belt conveyors 17 and a total of three constant speed feed rollers 18 installed on the belt conveyors 17, respectively. The transfer time is sequentially transferred to the device 19, the standard length cutting unit 20, the gluing unit 21, the core tube supply unit 22 and the winding unit 23 at a constant speed, and the transfer time is measured by a counter (not shown). Every time the corrugated cardboard fabric 14 having a length L corresponding to each load receiving member 10 is transferred, each conveyor belt conveyor 17 and each constant speed feed roller 18 are stopped at the same time. At the time of this stop, required work is simultaneously performed in the corrugated plate removing device 19, the constant length cutting unit 20, and the core tube supply unit.

First, in the corrugated board removing device 19, the lower suction header 24 sucks the liner 11b below the corrugated board raw material 14 in the portion where the above-mentioned corrugated board 11a and the liner 11b are not glued. The upper suction header 25 descends, sucks the corrugated plate 11a on the upper part of the corrugated cardboard original fabric 14, and then ascends. As a result, the corrugated plate 11a is separated upward from the liner 11b, and the corrugated plate 11a lifted from the liner 11b is removed by cutting the corrugated plate 11a from both sides of the upper suction header 25 with a pair of cutters 26.

At the next stop, the flat portion S where the corrugated plate 11a is removed by the corrugated plate removing device 19 and becomes only the liner 11b is positioned in the standard length cutting part 20. In this fixed-length cutting section 20, the cutter 28 descends to cut almost the center of the flat portion S, and at the same time, the gluing belt 27 descends to apply the glue to the flat portion S. The liner 11b of the flat portion S becomes soft by applying a certain amount of water by the applied glue. The front side (left side) of the cut flat portion S becomes the terminal end portion S2, and the rear side (right side) thereof becomes the start end portion S1.

Subsequently, when passing through the gluing section 21, the glue 30 of the gluing container 29 is supplied to the gluing roller 32 via the gluing roller 31. By this gluing roller 32, the corrugated board 11 a of the corrugated paper roll 14 is The glue 30 is applied to the surface. Thereafter, in the core tube supply unit 22, one core tube 12 is dropped and supplied from the core tube stocker 33 onto the corrugated cardboard fabric 14 by the operation of the opening / closing section 34, and the core tube 12 is moved by the pressing tool 35. The pressure is applied by being pressed against the inner 11b. Here, since the distance L 1 between the corrugated plate removing device 19 and the standard length cutting unit 20 and between the standard length cutting unit 20 and the core tube supply unit 22 are set to be the same, the core tube 12 is The liner 11b is glued and cut by the standard length cutting unit 20, that is, the exposed liner 11b serving as the starting end portion S1 of the load receiving member 10 is accurately crimped. At this time, the liner 11b glued to the core length 12 by the above-mentioned fixed-length cutting part 20 is smoothly wrapped by being given a certain amount of water by the glue 30 and becoming soft.

Finally, in the winding section 23, when the core tube 12 is placed on the swing conveyor 36 for both winding and taking out, the core tube 12 is laterally inserted into the core tube 12 and the core tube 12 is freely rotatable. After that, the winding presser conveyor 37 descends from above and presses the core tube 12 between it and the winding / extracting swing conveyor 36. The take-up press conveyer 37 and the take-up / take-out swing conveyor 36 respectively travel in the directions shown, and the core tube 12 is rotated accordingly. As a result, the corrugated cardboard fabric 14 is rolled up into a cylindrical shape. At this time, since the corrugated board 11a is glued, the superposed surfaces of the corrugated board 14 which forms a cylinder are joined to each other. When the winding of the load receiving member 10 is completed, the winding presser conveyer 37 moves up, and the swing conveyor 36 for both winding and taking out is rotated as shown by the one-dot chain line to move the load receiving member 10 in the arrow direction. Taken out.

In this way, the flat corrugated plate 11a is removed from the long length of corrugated cardboard cloth 14 at a predetermined width for each predetermined length L, and the flat portion S is formed, and the portion S is cut at a substantially central portion. At the same time, the core tube 12 is glued and wound around the cut half of the flat portion S by pressure bonding, so that the load receiving member 10 can be continuously manufactured, and extremely good productivity can be obtained. Further, since the remaining half of the flat portion S, that is, the end portion S2 of the liner 11b is joined to the liner 11b facing inward, a separate member for adhering the final end portion such as gum tape is not required. Moreover, since the liner 11b contributes as a part of the strength member, the compressive strength and bending strength of the load bearing member 10 are improved as compared with the case where the gum tape is used.

The load receiving member 10 having the above-described configuration forms a rectangular corrugated cardboard 11 into a cylindrical shape by winding the corrugated cardboard a plurality of times in a spiral shape, and affixes the joint surfaces of the corrugated cardboard 11 in the cylindrical radial direction to each other. Therefore, when the load receiving member 10 is used so as to receive the load of the load in the axial direction A, the compressive strength, the second moment of area, and the bending rigidity of the load receiving member 10 are significantly increased. Therefore, it is possible to obtain a load receiving member that is lightweight, has high strength, and is excellent in recyclability.

When the pallet 13 shown in FIG. 4 is discarded, the upper plate 13a, the lower plate 13b, and the load receiving member 10 forming the pallet 13 are hit with a hammer so that the three can be easily separated. it can. Therefore, the waste is not bulky.

As shown in FIG. 6, the load receiving member 10 taken out from the swing / take-out swing conveyor 36 shown in FIG. An adhesive 51 that solidifies when exposed to air is applied to the surface and is covered with a resin film 52 from above. Therefore, in this state, the load receiving member 10 and the upper plate 13a and the lower plate 13b can be shipped, and the user can peel off the film 52 to assemble these three parts into a pallet 13. As a result, the transportation cost is reduced as compared with the case where the bulky pallet 13 preassembled by the manufacturer is shipped to the user.

By the way, in this embodiment, since the single-sided corrugated board 11 is used as the material, the material is more flexible than the double-sided corrugated board in which the liners are attached to both sides of the corrugated board, so that the corrugated board can be easily wound and the liner 11b Since the core tube 12 made of thick paper is wound around the center, the core tube 12 can be wound without losing its shape, and the rigidity of the load receiving member 10 is further improved and the strength is increased.

In the above embodiment, the rectangular corrugated cardboard 11 is wound with the corrugated plate 11a inside and the liner 11b outside. However, the corrugated plate 11a is outside and the liner 11b inside is rectangular. The corrugated cardboard may be wound. Further, in the above embodiment, as the rectangular corrugated cardboard 11, a single-sided corrugated ball in which the liner 11b is fixed to only one surface of the corrugated plate 11a is used. However, double-sided corrugated board or double-sided corrugated board may be used as long as it can be wound.

Further, in the above-described embodiment, an example in which the load receiving member 10 is used as a part of the pallet 13 of FIG. 4 has been described. However, the load receiving member 10 is a paper tube such as a film 41 as shown in FIG. It can also be used as 41.

Further, as shown in FIG. 8, the long load member 10 may be divided into, for example, two parts on a division surface including the axis thereof, and the cross section may have an arc shape. In this case, the load receiving members 10 and 10 divided into two can be used for the purpose of protecting the metal shaft 42 by covering it from the outside, for example.

Further, the load receiving member 10 of FIG. 1 can be applied to a simple chair or legs of a storage box by being used so as to receive a compressive load in the axial direction A.

[0032]

[Effect of device]

 As described above, according to the load receiving member of the present invention, the rectangular corrugated board is spirally wound multiple times to form the cylindrical shape, and the overlapping surfaces of the corrugated board forming the cylindrical shape are joined to each other. The load receiving member that is lightweight, has high strength, and is excellent in production because the compressive strength, the second moment of area and the bending rigidity are remarkably increased by using it so as to receive the load of the load in the axial direction. Pallets and paper tubes are obtained. Of course, the recyclability of corrugated board is not impaired.

In addition, since the corrugated board at the outermost end of the corrugated board is removed with a predetermined width in the winding direction, and the liner of the part where the corrugated board is removed is joined to the liner facing inward, so that it looks like gum tape. Since a separate member for treating the final end is not required and only the liner is joined, good adhesive strength can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a load receiving member according to an embodiment of the present invention.

FIG. 2 is a plan view showing an example of a method for manufacturing the same load receiving member.

FIG. 3 shows another example of the manufacturing method.

FIG. 4 is a side view and a plan sectional view of a pallet.

FIG. 5 is a schematic front view showing an example of the above-described load receiving member manufacturing apparatus.

FIG. 6 is a perspective view showing a modified example of the load receiving member.

FIG. 7 is a perspective view showing another application example of the load receiving member.

FIG. 8 is a perspective view showing still another application example of the load receiving member.

FIG. 9 is a perspective view of a pallet constructed using a conventional load receiving member.

[Explanation of symbols]

10 ... Load receiving member, 11 ... Corrugated board, 11a ... Corrugated board, 11b ... Liner, 13 ... Pallet, 13a ... Upper board,
13b ... lower plate, 41 ... paper tube.

Claims (4)

[Scope of utility model registration request] 1. A rectangular corrugated cardboard having a liner fixed to at least one surface of a corrugated plate is spirally wound a plurality of times to form a cylindrical shape, and the superposed surface of the corrugated cardboard forming the cylindrical shape is A load receiving member characterized by being joined to each other. 2. The corrugated board at the outermost end of the corrugated board is removed with a predetermined width in the winding direction, and the liner at the portion where the corrugated board is removed faces inwardly. A load receiving member joined to the liner. 3. A pallet in which both ends of a cylindrical cylindrical shape of the load receiving member according to claim 1 or 2 are fixed to an upper plate and a lower plate of the pallet. 4. A paper tube, wherein the load receiving member according to claim 1 or 2 is formed long in the axial direction.