JP4109509B2 - Cardboard pallet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a corrugated cardboard pallet formed of corrugated paper, which is used when a packaged product such as an electronic device is conveyed by a forklift.
[0002]
[Prior art]
Conventionally, when transporting packages with a forklift, as an alternative to wooden or synthetic resin-made pallet pallets, the pallet itself can be transported and stored, and assembled during use. Corrugated cardboard pallets that are easy to handle are used.
[0003]
As such a corrugated cardboard pallet, for example, as in Japanese Utility Model Laid-Open No. 6-16235, a cross-section is formed in a square shape from two opposite sides 2 and 2 'of the corrugated cardboard sheet 1 continuously cut and formed. A leg portion is formed by bending a cardboard leg piece 7 formed by bending the cross section into a U-shape in the openings 3c and 3d formed in the side portion of the leg portion having a B-shaped cross section. Some are designed to be inserted.
[0004]
Further, as disclosed in Japanese Utility Model Laid-Open No. 5-19131, both end portions 7 of a rectangular multi-layered corrugated cardboard sheet are folded to form a pair of left and right square tube portions 10, and X-shaped reinforcing ribs are formed in the square tube 10. There are a plurality of girders 2 provided with 8, 11 and a deck plate 3 disposed thereon.
[0005]
[Problems to be solved by the invention]
However, since the conventional corrugated board pallets as described above have a structure that requires at least two members, there is an inconvenience that each member must be individually managed before assembly.
[0006]
Further, among the above conventional examples, the former has a problem that the operation of inserting the leg piece 7 into the openings 3c and 3d formed on the side of the leg is troublesome. In the latter case of the above conventional example, because of the structure, the square tube portion 10 that supports the load on the deck plate 3 is laid sideways and all of the directions thereof are the same. Therefore, the strength is high depending on the direction in which the load is applied. There was a problem of being different.
[0007]
Accordingly, the present invention provides a corrugated cardboard pallet that can be easily assembled from a single corrugated cardboard member and has strength not only in a vertical load from the mounting surface but also in a load from each direction. Is an issue.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a cardboard pallet according to the present invention is
A pair of first side plates and a pair of second side plates , each having a height and a length , wherein both ends in each length direction are alternately connected to each other in a perpendicular direction;
A pair of outer top plates that are foldably connected to the upper sides of each of the pair of first side plates ;
A pair of inner top plates that are foldably connected to the upper sides of each of the pair of second side plates ;
A pair of outer bottom plates that are foldably connected to the lower sides of each of the pair of first side plates ;
A pair of inner bottom plates that are foldably connected to the lower sides of each of the pair of second side plates ;
A cardboard pallet formed into a box-like body by closing the outer top plate, the inner top plate, the outer bottom plate, and the inner bottom plate,
The length of the first, each of the central longitudinal portion of the second side plate, the notch in the U-shape, direction the first extending the two horizontal lines of characters of the co, second side plate And a single U-shaped vertical line is arranged at the same one end of the lengthwise ends of the first and second side plates so as to coincide with the direction. to put the folded portion is formed by Rukoto bending an inner portion of the notch in a plurality of locations toward the interior of the box-like body,
The box-shaped body is configured such that the bent portion forms a rectangular tube portion with an outer end portion at both ends from a length portion where the U-shaped cut portion is present in the length direction of the first and second side plates . Columnar support portions are formed at the four corners.
[0009]
According to such a corrugated cardboard pallet, it is easy to assemble, and since it is a single part even before assembling, it is convenient for storage and transportation, and its cost can be reduced. In addition to the load in the vertical direction from the mounting surface, it has strength against the load from each direction.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIGS. 1 to 3 are views referred to for explaining an embodiment of a cardboard pallet according to the present invention.
[0011]
FIG. 1 is a view of an assembled cardboard pallet 2 according to the present invention. The corrugated cardboard pallet 2 has a rectangular parallelepiped shape. And the columnar support part 6 which supports the load on the outer side top plates 4a and 4b is arrange | positioned in the four corners of the inside, The opening part 8 is formed in each side surface, The opening part The forklift fork can be put in 8.
[0012]
FIG. 2 is a view showing a developed shape of the corrugated cardboard pallet 2 before assembling. In the figure, a broken line indicates a folding line.
[0013]
In the developed shape shown in FIG. 2, the side surfaces 10a, 10b, 10c, 10d with the opening 8 shown in FIG. 1 are connected in a straight line, and the end of the side surface 10d is bonded to the side surface 10a during assembly. An adhesive margin 12 is provided so that the
[0014]
Each of the side surfaces 10a, 10b, 10c, and 10d is provided with a U-shaped cut 14 at the center in the length direction. There are a total of four fold lines at the inner portion 26 of the U-shaped cut 14 and the base thereof, and the positions of the fold lines are such that a square tube 24 as shown in FIG. It is a dimension.
[0015]
In FIG. 2, bottom plates 16a, 16b, 16c, and 16d are connected to bendable below the side surfaces 10a, 10b, 10c, and 10d, respectively.
[0016]
Inner top plates 18a and 18b are foldably connected to the side surfaces 10a and 10c (second side surfaces) on the side opposite to the inner bottom plates 16a and 16c, respectively. Is formed with a U-shaped cutout 20.
[0017]
This notch 20 leaves portions having substantially the same length as the sum of one side 24a and the other side 24b in the cross section of the rectangular tube portion 24 shown in FIG. 3 on both end sides of the inner top plates 18a and 18b. And, it is formed so as to have substantially the same depth as the height of the rectangular tube portion 24.
[0018]
A cut 22 is formed on the extended line at both ends of the side corresponding to the U-shaped bumping portion of the notch 20 so as to have substantially the same length as the side 24 a of the rectangular tube portion 24.
[0019]
As described above, the dimensions of the U-shaped notches 20 and the notches 22 in the inner top plates 18a and 18b are determined based on the dimensions of the rectangular tube portion 24, but the thickness of the cardboard is taken into consideration. Therefore, it does not become the exact same dimension.
[0020]
The inner top plates 18 a and 18 b are bent at a broken line perpendicular to the notch 22 through a broken line on the extension line of the notch 22 and a dead end point of the notch 22.
[0021]
Further, outer top plates 4a and 4b are connected to the side surfaces 10b and 10d (first side surfaces) so as to be foldable on the side opposite to the outer bottom plates 16b and 16d, respectively.
[0022]
Such an unfolded shape can be obtained as a single component when cutting from a corrugated cardboard sheet having a constant width, and in this case, the wasted area of the corrugated cardboard sheet is small. Therefore, the equipment for producing the corrugated cardboard pallet 2 according to the present invention suffices with the equipment equivalent to the equipment for producing a general cardboard box, and therefore it is easy to automate the assembly or a part thereof.
[0023]
The corrugated cardboard pallet 2 according to the present invention is assembled as follows from the developed shape of FIG.
[0024]
First, the broken line portion between the side surfaces 10a, 10b, 10c, and 10d is bent inward to bond the bonding margin 12 and the side surface 10a. Then, the inner bottom plates 16a and 16c are folded inward, the outer bottom plates 16b and 16d are folded so as to cover the inner bottom plates 16a and 16c from the outside, and then the inner surfaces of the inner bottom plates 16a and 16c and the inner bottom plates 16b and 16d are folded. Adhere and fix the sides.
[0025]
Next, the inner portions 26 of the U-shaped cuts 14 of the side surfaces 10a, 10b, 10c, and 10d are bent toward the inner side of the box at four broken line portions to form the opening 8 as shown in FIG. At the same time, the rectangular tube portion 24 is formed. Although not shown, a reinforcing member having the same height as that of the rectangular tube portion 24 can be disposed in the space inside the rectangular tube portion 24.
[0026]
Then, the inner top plates 18a and 18b are bent at the broken line portion between the side surfaces 10a and 10c so as to close the space inside the rectangular tube portion 24 from the upper side, and then bent at the broken line on the extension line of the notch 22, The top plate portions constituting both sides of the notch 20 are bent at a broken line portion perpendicular to the cut 22 through the dead end of the cut 22 so as to wrap around the rectangular tube portion 24 so that the inner top plates 18a and 18b are wrapped. The respective parts of the inner top plates 18a and 18b together with the square tube part 24 form the columnar support parts 6 at the four corners of the pallet.
[0027]
Finally, the outer top plates 4a and 4b are bent inward, and the inner surfaces thereof and the outer surfaces of the inner top plates 18a and 18b are bonded to form a loading surface for the conveyed product on the upper surface of the cardboard pallet 2. It has become.
[0028]
In the corrugated cardboard pallet 2 assembled in this way, the outer top plates 4a and 4b are supported by the inner top plates 18a and 18b folded inward and the columnar support portions 6 at the four corners. It has great strength against such loads.
[0029]
In addition, the columnar support portion 6 is intended to improve the strength against a vertical load applied from the upper side to the upper surface in particular. However, since the plurality of corrugated board materials are overlapped and folded, the columnar support portion 6 is viewed from a direction other than the vertical direction. It has a high strength even with respect to the load.
[0030]
The present invention is not limited to the cardboard pallet 2 according to the above-described embodiment, and can be used for various cardboard pallets based on the same technical idea.
[0031]
【The invention's effect】
As described above, according to the corrugated board pallet of the present invention, it is easy to assemble, and since it is a single part even before assembly, it is convenient for storage and transportation, and its cost can be reduced. In addition to the load in the vertical direction from the mounting surface, it has strength against the load from each direction. In addition, the assembly or part of it is easy to automate, and when it is discarded, it can be easily disassembled, and since no materials other than corrugated cardboard are contained, pollution can be prevented.
[0032]
The corrugated board pallet according to the present invention has a particularly high strength against a load from the vertical direction and a high strength against a load from each direction. Since the material is corrugated board, the shock absorbing ability is also excellent. Furthermore, the intensity | strength can be improved by arrange | positioning a part of inner side top board as a reinforcement member around a square cylinder part, and comprising a columnar support part.
[0033]
Moreover, since it has an opening part in a side surface, it can be used as a pallet which can put the fork of a forklift and can convey it.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cardboard pallet 2 according to an embodiment of the present invention.
FIG. 2 is a development view of the corrugated cardboard pallet 2 in FIG. 1 before assembly.
FIG. 3 is a perspective view to be referred for explaining a method of assembling the cardboard pallet 2 in FIG. 1;
[Explanation of symbols]
2 Corrugated board pallets 4a, 4b Outer top plate 6 Column-shaped support portion 8 Openings 10a, 10b, 10c, 10d Side surface 12 Adhesive margin 14 U-shaped cuts 16a, 16b, 16c, 16d Bottom plates 18a, 18b Inner top plate 20 Notch 22 notch 24 square cylinder part 24a, 24b side 26 inner part

Claims (4)

A pair of first side plates and a pair of second side plates , each having a height and a length , wherein both ends in each length direction are alternately connected to each other in a perpendicular direction;
A pair of outer top plates that are foldably connected to the upper sides of each of the pair of first side plates ;
A pair of inner top plates that are foldably connected to the upper sides of each of the pair of second side plates ;
A pair of outer bottom plates that are foldably connected to the lower sides of each of the pair of first side plates ;
A pair of inner bottom plates that are foldably connected to the lower sides of each of the pair of second side plates ;
A cardboard pallet formed into a box-like body by closing the outer top plate, the inner top plate, the outer bottom plate, and the inner bottom plate,
The length of the first, each of the central longitudinal portion of the second side plate, the notch in the U-shape, direction the first extending the two horizontal lines of characters of the co, second side plate And a single U-shaped vertical line is arranged at the same one end of the lengthwise ends of the first and second side plates so as to coincide with the direction. to put the folded portion is formed by Rukoto bending an inner portion of the notch in a plurality of locations toward the interior of the box-like body,
The box-shaped body is configured such that the bent portion forms a rectangular tube portion with an outer end portion at both ends from a length portion where the U-shaped cut portion is present in the length direction of the first and second side plates . A corrugated cardboard pallet comprising columnar support portions formed at four corners.   The corrugated cardboard pallet according to claim 1 which has a space for arranging a reinforcing member inside said square tube part. The length from the upper side to the tip of the second side plate in each of the pair of inner top plates is determined by the cross-sectional dimension of the rectangular tube part and the height dimension of the rectangular tube part in the same direction as the length direction. It is almost the same length as the sum,
It is possible to fold along the side of the front end side of the inner top plate with a width of the same dimension as the height dimension of the rectangular tube part, and form a U-shaped notch at the center of the length of the bent part,
On the extension line at both ends of the abutting portion of the U-shaped notch, a cut having a length substantially the same as the dimension of the cross section of the rectangular tube portion is made,
Bending the inner top plate at each part to close the cross section of the square tube part,
The cardboard pallet according to claim 1 or 2, wherein a part of the inner top plate is bonded to the outside of the rectangular tube portion to reinforce the columnar support portion.   The cardboard pallet according to claim 3, wherein the outer top plate bent and connected to the pair of inner top plates in a right angle direction covers the entire upper surface of the box-shaped body.

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