JP2010036915A - Corrugated board pallet and paper beam member used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated board pallet designed so that even if its lower face is immersed in water, water is less likely to enter the insides of beam members, recycle is facilitated at a low cost and light weight and high strength are achieved, and to provide a paper beam member used therefor. <P>SOLUTION: The paper beam member 5a composing the corrugated board pallet includes: a rectangular column 8a formed from a base plate 10, outer plates 11a and 11b, upper plates 12a and 12b, inner plates 13a and 13b, and edge plates 14a and 14b; and a plurality of cylinders 9 set within the rectangular column 8a with a predetermined space between them. Edge plates 14a and 14b are folded in a mountain shape and accommodated inside the rectangular column. The inner plates 13a and inner plates 13b and the inner plates 13a and 13b folded are inserted in the cylinders 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a corrugated cardboard pallet used for lifting and transporting cargo goods by a forklift or the like in a factory or a warehouse, and a paper girder member used therefor, in particular, it is excellent in water resistance and is inexpensive and easy to recycle. The present invention relates to a cardboard pallet and a paper girder member used therefor.

  When a plurality of cargoes are carried together using a forklift or the like, a metal or wooden pallet (loading platform) is often used. However, metal and wooden pallets are heavy and inconvenient to handle. Also, wooden pallets are not easy to recycle and are often incinerated after use. Furthermore, since metal and wooden pallets are expensive, they are difficult to apply to so-called one-way pallets for export, and their uses are limited. In recent years, corrugated cardboard pallets (hereinafter referred to as corrugated cardboard pallets) that are lightweight, easy to handle and excellent in recyclability have attracted attention as an alternative to metal or wooden pallets. Corrugated cardboard pallets are less expensive than metal or wooden pallets, and do not require insecticidal treatment like wooden pallets. On the other hand, corrugated cardboard pallets are inferior in strength compared to metal or wooden pallets, and in particular, girder members have insufficient strength. Therefore, in order to deal with such problems, various researches have been made on various corrugated cardboard pallets, and some inventions and devices have already been disclosed.

For example, in Patent Document 1, in a corrugated cardboard pallet having a structure in which a paper tube piece is bonded and fixed between an upper plate and a lower plate of the pallet, the upper and lower plates of the paper tube and the upper and lower plates of the pallet are difficult to separate. An invention relating to the "girder structure of a cardboard pallet" is disclosed.
The invention disclosed in Patent Document 1 includes a longitudinal gap girder having a U-shaped cross section or a rectangular shape, and a plurality of cylindrical paper tube pieces disposed at predetermined intervals in a gap groove of the longitudinal gap girder. Is provided.
The “corrugated structure of cardboard pallet” having the above-described structure has an effect that the adhesive strength between the girders and the upper plate of the pallet and the lower plate of the pallet is high. In addition, since the process of creating the longitudinal gap beams and the bonding process of the longitudinal gap beams, the upper plate, and the lower plate can be performed separately, the overall work efficiency is improved.

Further, Patent Document 2 has the name “girder, method for producing girder and pallet”, which is lightweight and has high strength despite being formed only of paper, and is firmly attached to the base plate. An invention relating to a girder that can be attached, a manufacturing method thereof, and a pallet using these girder materials is disclosed.
The invention disclosed in Patent Document 2 is composed of a square paper tube, at least one surface abutting against the lower surface of the base plate, and a column body installed in the frame body so that the tube axis is orthogonal to the base plate. It is to be prepared.
In the girder having such a structure, the column body has a sufficient strength because it serves as a reinforcing material. Even when the frame is long in the axial direction, the strength of the beam can be increased by arranging the columns at a predetermined interval.

Further, Patent Document 3 discloses an invention relating to a “corrugated member of a corrugated cardboard pallet” that is lightweight, excellent in strength, and can be easily manufactured with a small amount of material.
The "girder member of corrugated cardboard pallet" disclosed in Patent Document 3 has an upright plate, a facing plate, an upright plate and a support plate sequentially connected to both side edges of the main plate, and the tip of the support plate is connected to the upright plate. While making it contact | abut to the continuous part of a facing plate, two both standing plates are faced | matched and a cylinder is formed. Then, the wedge member is inserted into the cylindrical body through a notch portion formed in the main plate, and the wedge member is engaged with the notch portion formed in the connecting portion of the inner plate and the support plate, and the wedge member It is the structure which pinched | interposed two adjacent standing plates with the notch part formed in the front-end | tip.
According to such a structure, it has the effect | action that the shape of a cylinder is maintained by a wedge member. Moreover, it has the effect | action that the standing board and the standing board which hold | maintain the space | interval of a main board and a facing board are reinforced with a support plate. Thereby, sufficient strength can be obtained without using a large amount of cardboard sheets.
JP 2001-213435 A JP 2001-328631 A Japanese Patent Laid-Open No. 10-101078

  However, in the invention disclosed in Patent Document 1 which is the above-described prior art, since the cylindrical paper tube is bonded to the longitudinal gap girder material, there is a possibility that the cylindrical paper tube cannot be fixed sufficiently. It was. In this case, it can be solved to some extent by increasing the amount of adhesive used, but this time, it becomes difficult to separate the cylindrical paper tube from the longitudinal gap girder when the pallet is discarded, and the recyclability decreases. A new problem arises. In addition, there is a problem that the strength is insufficient at the end of the longitudinal gap girder that cannot be sufficiently reinforced by the cylindrical paper tube. Furthermore, when the lower surface of the girder is submerged, there is a problem that water enters from the end portion and the strength of the girder is significantly reduced.

  Further, the invention disclosed in Patent Document 2 has a problem in that the strength is insufficient at the end of the square paper tube. Further, since both ends of the square paper tube are open, there is a possibility that when the lower surface is submerged, water enters the inside and the strength of the girder decreases.

  Furthermore, in the invention disclosed in Patent Document 3, there is a problem that the cylindrical body cannot be reinforced in directions other than the direction parallel to the support plate. Moreover, when the lower surface of the cylindrical body is submerged, there is a problem that water enters from the openings at both ends and the strength of the girder member decreases.

  The present invention has been made in response to such a conventional situation, and even when the lower surface is submerged, it is difficult for water to enter the inside of the girder member, and it is inexpensive and easy to recycle, and is lightweight and has high strength. An object of the present invention is to provide a corrugated cardboard pallet and a paper girder member used therefor.

In order to achieve the above object, a paper girder member according to the first aspect of the present invention is a paper girder member installed in contact with a top plate of a cardboard pallet, and a substrate disposed in parallel to the top plate. And two pairs of outer plates extending from the four sides of the substrate, two pairs of upper plates respectively extending from the two pairs of outer plates and arranged parallel to the substrate, A first inner plate extending from the upper plate and a cylindrical body erected on the substrate are housed in a rectangular column formed by the substrate, the outer plate, and the upper plate. The first inner plate that is bent toward the inside is inserted into the inside of the cylindrical body with its side surface being in contact with the inner peripheral surface.
The paper girder member having such a structure has the effect that the compressive strength and the strength in the width direction of the prismatic body are increased by the cylindrical body erected on the substrate. Further, the substrate, the outer plate, and the upper plate have an effect of preventing moisture and the like from entering the prism body. Further, the cylindrical body has an action of being fixed to the prismatic body by the first inner plate inserted therein.

According to a second aspect of the present invention, there is provided a pair of paper girders according to the first aspect, each of which extends from two adjacent outer plates and is folded into a mountain fold and stored inside the prismatic body. It is characterized by having an edge plate.
In the paper girder member having such a structure, the edge plate acts to increase the strength at the corner of the prismatic body. The edge plate has an action of holding the cylindrical body together with the first inner plate so as to be sandwiched from the inner surface side and the outer surface side. Further, when the edge plate is extended from the entire edge of the two outer plates, the edge plate in a state of being bent in a mountain fold at both ends of the prismatic body, water enters between the two outer plates. Has the effect of preventing.

According to a third aspect of the present invention, in the paper girder member according to the first or second aspect, the side surface of the first inner plate is formed so as to expand toward the edge, and from the upper plate. An extended second inner plate is provided, and the second inner plate is bent so that the first inner plate can be pushed into the cylindrical body while being in contact with the side surface.
The paper girder member having such a structure has an effect that the first inner plate pushed down by bending the second inner plate presses the cylindrical body from the inside.

A corrugated board pallet according to a fourth aspect of the present invention includes a top plate and the paper girder member according to any one of the first to third aspects, and the upper plate of the paper girder member is a top plate. It is characterized by being bonded and fixed to.
The corrugated board pallet having such a structure has high strength while being lightweight. Moreover, it is excellent in water resistance and easy to handle. Furthermore, since the paper girder member can be easily disassembled at the time of disposal, it is excellent in recyclability.

A corrugated board pallet according to a fifth aspect of the present invention comprises a top plate provided with a plurality of slits, and the paper girder member according to any one of claims 1 to 3, wherein the paper girder is provided. The member is characterized in that it is formed in a prismatic shape in such a state that the outer plate and the inner plate are inserted into the slit and wraps the top plate.
In the corrugated cardboard pallet having such a structure, the paper girder member is more strongly fixed to the top plate than the invention according to claim 4. Therefore, even when a shearing force that causes the paper girder member to be separated from the top plate is generated, the paper girder member is not easily detached from the top plate. When the cargo is loaded on the top plate, the cargo holds the top plate together with the top plate, and the paper girder member is prevented from being displaced with respect to the top plate.

  As described above, the paper girder according to the first aspect of the present invention can increase the strength in the width direction and the height direction while being lightweight. Further, since the cylindrical body and the prismatic body are not bonded, the cylindrical body can be easily separated from the prismatic body during disposal or the like.

  In the paper girder member according to claim 2 of the present invention, the strength at the corners can be increased. In addition, the fixing strength of the cylindrical body with respect to the prismatic body can be further increased as compared with the first aspect of the invention. In addition, when an edge plate is extended from the whole edge of two outer plates, water resistance can be improved further than the invention of Claim 1.

  In the paper girder member according to claim 3 of the present invention, since the first inner plate is pushed deeply into the cylindrical body by the second inner plate, the invention according to claim 1 or claim 2 is applied. In comparison, the cylindrical body can be more strongly fixed to the prismatic body.

  In the corrugated cardboard pallet according to claim 4 of the present invention, since no adhesive is used when assembling the paper girder member, the manufacturing process is simplified. Thereby, manufacturing cost can be reduced. Therefore, it can be applied to a one-way pallet for export.

  In the corrugated cardboard pallet according to claim 5 of the present invention, the fixing strength of the paper girder member to the top plate can be remarkably increased as compared with the invention according to claim 4. Further, it is possible to reduce the amount of the adhesive used in the invention of the fourth aspect, further reduce the manufacturing cost, and improve the recyclability.

  Examples of the corrugated cardboard pallet according to the best mode of the present invention and the paper girder member used therefor will be described below with reference to FIGS.

A corrugated board pallet according to Embodiment 1 will be described with reference to FIGS. 1 to 7 (particularly, corresponding to claims 1 to 4).
Fig.1 (a) is an external appearance perspective view of Example 1 of the cardboard pallet based on Embodiment of this invention, (b) is a top view of a top plate. FIGS. 2A and 2B are a front view and a partially enlarged view of the corrugated cardboard pallet according to the first embodiment, respectively. FIG. 2 shows a state in which the cargo loaded on the top plate is fixed by a fixing belt. FIGS. 3A and 3B are external perspective views of a paper girder member constituting the corrugated cardboard pallet of the first embodiment. FIG. 3B shows a state in the middle of assembling the paper girder member. FIG. 4 is a development view of a prismatic body constituting the paper beam member of the first embodiment. Fig.5 (a) has shown the state before bending an upper board in the front view of the paper-made girder members of Example 1, (b) is a top view of the same figure (a). 6A shows a state where one upper plate is bent in the side view of the paper girder member of Example 1, FIG. 6B is a plan view of FIG. 3A, and FIG. It is a JJ arrow directional cross-sectional view of the same figure (b). 7A to 7D are partially enlarged views of FIG. 6C. FIG. 7D shows a modification of the paper beam member of the first embodiment.
As shown in FIGS. 1A and 1B, the corrugated cardboard pallet 1 a includes a top plate 2, a bottom plate 4, and a paper girder member 5 a, and a prismatic paper product is provided between the top plate 2 and the bottom plate 4. A space for inserting the pawl of the forklift is formed by installing the beam member 5a. And the flaps 2a and 2a are provided in the both sides of the top plate 2 so that bending according to the valley fold line 3 is possible. The top plate 2 and the bottom plate 4 are flat plates made of so-called “corrugated cardboard sheets” in which multilayer paperboards called liners are bonded to the front and back of a corrugated core. It has a rectangular shape. The paper girder member 5a is bonded to the top plate 2 and the bottom plate 4, respectively.
As shown in FIGS. 2 (a) and 2 (b), the cargo 6 loaded on the cardboard pallet 1a is fixed to the fixed belt in a state of being sandwiched from both sides by flaps 2a and 2a folded upward along the valley fold line 3. 7 is fixed to the top plate 2. At this time, the flaps 2a and 2a have the effect of preventing the cargo from being displaced with respect to the top plate 2, increasing the bending rigidity of the top plate 2, and making the top plate 2 difficult to bend when the cardboard pallet 1a is lifted by a forklift. Further, the bottom plate 4 has an effect of increasing the bending rigidity of the entire cardboard pallet 1a by integrally connecting a plurality of paper girder members 5a that are individually bonded to the top plate 2.

As shown in FIGS. 3A and 3B, the paper girder member 5a includes a substrate 10, outer plates 11a and 11b, upper plates 12a and 12b, inner plates 13a and 13b, and edge plates 14a and 14b. A prismatic body 8a and a plurality of cylindrical bodies 9 installed at predetermined intervals are provided.
The prismatic body 8a is formed by bending the aforementioned “corrugated cardboard sheet” inward along the valley fold line. The cylindrical body 9 has a structure in which a liner is wound in a cylindrical shape. The prism body 8 a is partially bent and inserted into the cylindrical body 9. Although two cylindrical bodies 9 are shown in FIG. 3, the number of cylindrical bodies 9 installed inside the prismatic body 8a is not limited to two, and the length of the prismatic body 8a. It can be appropriately changed depending on the situation.
As shown in FIG. 4, in the prismatic body 8a, the outer plates 11a and 11a and the outer plates 11b and 11b extend symmetrically with the substrate 10 interposed therebetween, and the outer plates 11a and 11a and the outer plates 11b and 11b are extended. The upper plates 12a and 12a and the upper plates 12b and 12b are respectively extended from. Furthermore, inner plates 13a and 13a and inner plates 13b and 13b extend from the upper plates 12a and 12a and the upper plates 12b and 12b, respectively. The inner plates 13a and 13a have side surfaces 19 and 19 formed so as to expand toward the end edge 18a, respectively. In addition, slits 17 and 17 are formed in the inner plates 13a and 13a from the end edge 18a toward the valley fold line 15e. Further, edge plates 14a and 14b connected to each other via a mountain fold line 16 are extended from the outer plates 11a and 11b, respectively. The outer plates 11a and 11b, the upper plates 12a and 12b, the inner plates 13a and 13b, and the edge plates 14a and 14b can be folded into valley folds along the valley fold lines 15a to 15h.

Next, the procedure for assembling the paper girder member 5a will be described.
As shown in FIGS. 5 (a) and 5 (b), after two cylindrical bodies 9 are erected and arranged at a predetermined interval on the substrate 10 of the prismatic body 8a, the outer plates 11a, 11a is folded into valley folds at substantially right angles according to the valley fold line 15a (see FIG. 4). Further, the outer plates 11b and 11b are folded at the mountain fold line 16 (see FIG. 4), and the outer plates 11b and 11b are folded at the valley fold lines 15b and 15h (see FIG. 4), respectively. According to FIG. 4), each is folded into a valley fold at a substantially right angle. Next, as shown in FIG. 6A, the upper plates 12a and 12a and the inner plates 13a and 13a are sequentially folded into valley folds according to the valley fold lines 15c and 15e (see FIG. 4), and the inner plates 13a and 13a are folded. The upper end of the cylindrical body 9 is fitted into the slits 17 and 17 by being inserted into the cylindrical body 9. Further, as shown in FIGS. 6B and 6C, the upper plates 12b and 12b and the inner plates 13b and 13b are sequentially folded into a valley fold according to the valley fold line 15d (see FIG. 4) and the valley fold line 15f, The plates 13b and 13b are folded into valley folds according to the valley fold line 15f, and the inner plates 13b and 13b are inserted into the cylindrical body 9. That is, the inner plates 13 b and 13 b are bent so that the inner plates 13 a and 13 a are pushed into the cylindrical body 9 with their end edges 18 b being in contact with the side surfaces 19 and 19 of the inner plates 13 a and 13 a.

  In the paper-made girder member 5a having such a structure, the cylindrical body 9 erected on the substrate 10 applies loads applied to the upper plates 12a and 12a and the upper plates 12b and 12b to the outer plates 11a and 11a and the outer plate 11b. , 11b and support. That is, the cylindrical body 9 acts to increase the compressive strength of the prismatic body 8a. Further, since the cylindrical body 9 is installed inside the prismatic body 8a so as to be in contact with the inner wall surfaces of the outer plates 11a and 11a, it has an effect of increasing the strength in the width direction of the prismatic body 9 as well. Further, the prismatic body 8a formed by the substrate 10, the outer plates 11a and 11a, the outer plates 11b and 11b, the upper plates 12a and 12a, and the upper plates 12b and 12b has an effect that moisture or the like hardly enters the inside. In addition, the edge plates 14a and 14b disposed between the cylindrical body 9 and the outer plate 11b in a state of being bent in a mountain fold at both ends of the prismatic body 8a have water from between the outer plate 11a and the outer plate 11b. It has the effect of preventing intrusion. Further, the edge plates 14 a and 14 b have an effect of increasing the strength at the corners of the prismatic body 8 a that is not reinforced by the cylindrical body 9. Further, the inner plates 13a and 13b and the edge plates 14a and 14b inserted into the cylindrical body 9 have an action of holding the cylindrical body 9 so as to be sandwiched from the inner surface and the outer surface. Therefore, the cylindrical body 9 can be reliably fixed to the prismatic body 8a.

The operation of the inner plates 13b and 13b will be described with reference to FIG.
As shown in FIG. 7A, when the upper plate 12b is pushed down in the direction of arrow A, the end 18b of the inner plate 13b descends along the side surface 19 of the inner plate 13a. At this time, the inner plate 13a presses the cylindrical body 9 in the direction of the arrow B from the inside while being pushed down in the direction of the arrow A as shown in FIG. 7B by friction with the inner plate 13b. As a result, the inner plate 13 a is pushed deeply into the cylindrical body 9. Thereby, the cylindrical body 9 can be strongly fixed with respect to the prismatic body 8a.
The inner plates 13a and 13b are finally inserted into the cylindrical body 9 until the state shown in FIG. In the present embodiment, since the cylindrical body 9 is fixed to the prismatic body 8a without using an adhesive, when the edge plates 14a and 14b are thick, they are folded into a mountain fold. Accordingly, there is a possibility that the upper plate 12b rotates in the direction of the arrow C and returns to the state shown in FIG. However, in this case, as shown in FIG. 7D, the inner plate 13b is preliminarily implemented so that the tip of the inner plate 13b is inserted between the inner plate 13a and the cylindrical body 9. It may be formed longer than in the example. That is, in the state of FIG. 7D, since the inner plate 13b is sandwiched between the inner plate 13a and the cylindrical body 9, the upper plate 12b rotates in the direction of arrow C due to the elastic recovery of the edge plates 14a and 14b. There is no fear. As a result, the cylindrical body 9 is firmly fixed by the inner plates 13a and 13b and the edge plates 14a and 14b inside the prismatic body 8a.

As described above, in the paper girder member 5a of the present embodiment, it is possible to increase the strength in the width direction and the height direction while being lightweight. Further, since the cylindrical body 9 is not bonded to the prismatic body 8a, the cylindrical body 9 can be easily separated from the prismatic body 8a at the time of disposal or the like. Further, the strength can be maintained even when the lower part is submerged.
The cardboard pallet 1a provided with such a paper girder member 5a has high strength while being lightweight. Moreover, since it is excellent in water resistance, handling is easy. Furthermore, since no adhesive is used when assembling the paper girder member 5a, it is possible to simplify the manufacturing process and reduce the manufacturing cost. Therefore, it can be applied to a one-way pallet for export. Further, since the paper girder member 5a can be easily disassembled at the time of disposal, it is excellent in recyclability.

A corrugated board pallet according to the second embodiment will be described with reference to FIGS. 8 to 10 (particularly corresponding to claim 5).
FIG. 8A is an external perspective view of Example 2 of the cardboard pallet according to the embodiment of the present invention, and FIG. 8B is a partially enlarged plan view of the top plate. FIG. 9 is a development view of a prismatic body constituting the paper beam member of the second embodiment. FIGS. 10A to 10C are respectively a partially enlarged view of the direction of arrow D in FIG. 8A, a cross-sectional view taken along line KK, and a cross-sectional view taken along line LL. is there. Note that the components shown in FIGS. 1 to 7 are denoted by the same reference numerals and description thereof is omitted. In FIG. 10, the illustration of the bottom plate is omitted.
In the corrugated cardboard pallet 1a of the first embodiment, the paper girder member 5a is bonded to the top plate 2. On the other hand, in the corrugated cardboard pallet 1b of the present embodiment, the paper girder member 5b is used without using the adhesive. It is structured to be fixed to. That is, as shown in FIG. 8A, the paper girder member 5 b is formed in a prismatic shape with the top plate 2 being wrapped. As a result, the paper girder member 5b is firmly fixed to the top plate 2 without using an adhesive.
As shown in FIG. 8B, the top plate 2 is provided with slits 20a to 20d. The outer plates 11a and 11b and the inner plates 13a and 13b of the paper girder member 5b are inserted into the slits 20a to 20d, as will be described later. Further, as shown in FIG. 9, the outer plates 11 a and 11 b protrude from the edges of the edge plates 14 a and 14 b by the thickness of the top plate 2 so that the paper girder member 5 b can wrap the top plate 2. It has a shape. In the present specification, the notch portion formed at the end portion of the top plate 2 is not particularly distinguished from the other slits in the hole shape, and the expression “slit” is used.

Next, a procedure for assembling the paper girder member 5b will be described.
As shown in FIG. 10 (a), the outer plates 11a and 11a are folded into valley folds according to the valley fold line 15a (see FIG. 9) so as to wrap the two cylindrical bodies 9 arranged upright on the substrate 10 of the prismatic body 8b. At the same time, the outer plates 11b and 11b are folded according to the valley fold line 15b so that the edge plates 14a and 14b are folded at the mountain fold line 16 (see FIG. 9) and are folded at the valley fold lines 15g and 15h (see FIG. 9). The outer plates 11 a and 11 b are inserted into the slits 20 a and 20 b (see FIG. 8B) of the top plate 2 by folding into valley folds. Next, as shown in FIGS. 10B and 10C, the upper plates 12a and 12a and the inner plates 13a and 13a are sequentially folded into valley folds according to valley fold lines 15c and 15e (see FIG. 9), and the inner plate 13a. , 13a are inserted into the slit 20c. Thereafter, the inner plates 13 a and 13 a are inserted into the cylindrical body 9 and the upper ends of the cylindrical body 9 are fitted into the slits 17 and 17. Further, the upper plates 12b and 12b and the inner plates 13b and 13b are sequentially bent into valley folds according to the valley fold lines 15d and 15f (see FIG. 9), and the inner plates 13b and 13b are inserted into the slits 20d and 20d. Thereafter, the inner plates 13 b and 13 b are inserted into the cylindrical body 9. That is, the inner plates 13 b and 13 b are bent so that the inner plates 13 a and 13 a are pushed into the cylindrical body 9 with their end edges 18 b being in contact with the side surfaces 19 and 19 of the inner plates 13 a and 13 a. Through the above procedure, the paper girder member 5b is formed in a prismatic shape in a state where the top plate 2 is wrapped.

According to the corrugated cardboard pallet 1b having such a structure, the paper girder member 5b formed in a prismatic shape wraps the top plate 2. Therefore, in the corrugated cardboard pallet 1a of the first embodiment, the paper girder member 5a is The paper girder member 5 b is firmly fixed to the top plate 2 as compared with the case where it is bonded to the plate 2. Therefore, for example, even when a shearing force is applied to the paper girder member 5b so that the paper girder member 5b is separated from the top plate 2 by contact with a claw or the like of a forklift, the paper girder member 5b is not easily detached from the top plate 2. In particular, when the cargo 6 is loaded on the top plate 2, the cargo 6 sandwiches the top plates 12 a and 12 b together with the top plate 2 to prevent the paper girder member 5 b from being displaced with respect to the top plate 2. The effect is demonstrated.
As described above, in the corrugated cardboard pallet 1b of the present embodiment, the fixing strength of the paper girder member with respect to the top plate 2 can be significantly increased as compared with the case of the first embodiment. This increases the durability of the pallet. In addition, it is possible to reduce the amount of adhesive used compared to the case of Example 1 to further reduce the manufacturing cost and further improve the recyclability.

  Although the corrugated board pallet of the present embodiment has a structure including a bottom plate, the bottom plate can be omitted. Also, the top plate flap can be omitted. Furthermore, the location and number of paper girder members with respect to the top plate are not limited to this embodiment, and can be changed as appropriate.

  As described above, the invention described in claims 1 to 3 is not only used as a girder member of a cardboard pallet but also installed in a cardboard box to support heavy objects when packing heavy objects. It can be applied when fixing or fixing. In addition, the inventions described in claims 4 and 5 are particularly effective for applications where the number of times of repeated use is small, such as an export one-way pallet.

(A) is an external appearance perspective view of Example 1 of the corrugated cardboard pallet concerning an embodiment of the invention, and (b) is a top view of a top board. (A) And (b) is the front view of the cardboard pallet of Example 1, respectively, and the elements on larger scale of a side view. (A) And (b) is an external appearance perspective view of the paper girder member which comprises the cardboard pallet of Example 1. FIG. FIG. 3 is a development view of a prismatic body constituting the paper girder member of Example 1. (A) has shown the state before bending an upper board in the front view of the paper-made girder member of Example 1, (b) is the top view of the same figure (a). (A) has shown the state which bent one upper board in the side view of the paper-made girder member of Example 1, (b) is the top view of Fig.3 (a), (c) is the same figure. It is a JJ arrow directional cross-sectional view of (b). (A) thru | or (d) is the figure which expanded partially FIG.6 (c). (A) is an external appearance perspective view of Example 2 of the cardboard pallet according to the embodiment of the present invention, and (b) is a partially enlarged plan view of the top plate. It is an expanded view of the prismatic body which comprises the paper-made girder members of Example 2. (A) thru | or (c) is the figure which expanded the D direction arrow directional view of Fig.8 (a), respectively, the KK arrow sectional drawing, and the LL arrow sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b ... Corrugated board pallet 2 ... Top plate 2a ... Flap 3 ... Valley fold line 4 ... Bottom plate 5a, 5b ... Paper girder member 6 ... Cargo 7 ... Fixed belt 8a, 8b ... Rectangular column body 9 ... Cylindrical body 10 ... Substrate 11a, 11b ... Outer plate 12a, 12b ... Upper plate 13a, 13b ... Inner plate 14a, 14b ... Edge plate 15a-15h ... Valley fold line 16 ... Mountain fold line 17 ... Slit 18a, 18b ... Edge 19 ... Side face 20a-20d ... Slit

Claims (5)

  In a paper girder member installed in contact with the top plate of the cardboard pallet, a substrate disposed in parallel to the top plate, and two pairs of outer plates respectively extending from four sides of the substrate, Two pairs of upper plates extending from the two pairs of outer plates and arranged in parallel to the substrate, a first inner plate extending from the upper plate, and standing on the substrate The cylindrical body is housed in a prismatic body formed by the substrate, the outer plate and the upper plate, and the first inner plate bent toward the inside of the prismatic body is the A paper girder member, wherein the paper girder is inserted into the cylindrical body with a side surface abutting against an inner peripheral surface.   The paper girder according to claim 1, further comprising a pair of edge plates that are respectively extended from the two adjacent outer plates and are housed by being folded into a mountain fold inside the prismatic body. Element.   The side surface of the first inner plate is formed so as to expand toward the edge, and includes a second inner plate extending from the upper plate, and the second inner plate is provided on the side surface. 3. The paper girder member according to claim 1, wherein the first inner plate is bent so as to be pushed into the cylindrical body while being in contact with the first inner plate.   A top plate and the paper girder member according to any one of claims 1 to 3, wherein the upper plate of the paper girder member is bonded and fixed to the top plate. Cardboard pallet. A top plate provided with a plurality of slits and the paper girder member according to any one of claims 1 to 3, wherein the paper girder member includes the outer plate and the inner plate as the slit. A corrugated cardboard pallet formed into a prismatic shape so as to wrap around the top plate.