JP2009262943A - Plastic corrugated fiberboard box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic corrugated fiberboard box capable of simplifying its structure as the box, reducing the number of components and the material cost, and being easily assembled. <P>SOLUTION: The plastic corrugated fiberboard box 1 is composed of front and rear walls 2 and 3, right and left walls 4 and 5, and a bottom wall 6. The front and rear walls 2 and 3 are vertically divided into two. Lower edges 2a and 3a of their upper side sections 2A and 3A and upper edges 2b and 3b of their lower side sections 2B and 3B are connected to each other by a hinge member 7 having a structure by which the fingers are not caught. Lower end parts of the right and left walls 4 and 5 have pointed shapes, and are attached to/detached from recessed grooves 22 formed in right and left end parts of the bottom wall 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foldable plastic cardboard box for accommodating various objects.

  Conventionally, two parallel surface plate portions and a plurality of partition wall portions formed between the two surface plate portions at right angles to the surface plate portions at regular intervals, and both surface plate portions As a foldable box using plastic corrugated cardboard in which a number of hollow portions are arranged in line with a partition wall portion, the following are known.

  That is, in a plastic cardboard box composed of a bottom plate, two swinging side plates located on two opposite sides of the bottom plate, and a bent side plate located on the remaining two sides of the bottom plate, at both ends of the bottom plate A locking portion is formed, and a reinforcing band integrally attached to the lower end portion of the swing side plate is engaged with the locking portion, and only the outer surface plate portion of the plastic corrugated cardboard is provided at the center of the height of the bent side plate. What cut | disconnected the whole length (henceforth "half cut") is known.

As another plastic corrugated cardboard box, a long box piece and a short box piece, which intersect each other at right angles to each other, form a box body, and the long box piece and the short box piece are adjacent to each other. It is known that mating edges are connected to each other with a hook-shaped clip member, and the long side box piece is half-cut in the horizontal direction over its entire length.
JP-A-6-135440 JP2001-18957

  In any of the above-mentioned plastic cardboard boxes, the following problems are observed.

  First of all, there is a problem that the structure as a box is complicated and the number of parts is large, and it takes time and labor to assemble and material costs.

  Secondly, when assembling the box in a folded state, the operator's fingers are caught in half-cut portions of the bent side plates and the long side box pieces, reducing the efficiency of the assembly work and causing pain in the operator's fingers. There was a disadvantage of producing.

  An object of the present invention is to provide a plastic cardboard box that has a simplified structure, has a small number of components, can be easily assembled, and does not have a risk of pinching fingers during assembly.

The present invention according to claim 1 comprises front and rear walls, left and right walls, and a bottom wall, a corner member is attached to an upper edge corner, a frame member is fitted between adjacent corner members, and the front and rear walls are respectively divided into two. Fingers that prevent the upper and lower parts of the front and rear walls from pinching fingers in a plastic cardboard box that is freely foldable and the left and right walls are swingable inward with their upper edges as fulcrums. They are connected by a pinching prevention hinge member.

According to a second aspect of the present invention, in the plastic corrugated cardboard box according to the first aspect, the finger pinching prevention hinge member is inserted into two cores into which the upper lower edge of the front and rear walls and the lower upper edge of the front and rear walls are fitted. It has a letter-shaped part and an intermediate wall formed between both U-shaped parts.

According to a third aspect of the present invention, in the plastic corrugated cardboard box according to the first or second aspect, the left and right end portions of the bottom wall are formed with concave grooves, and the lower end portions of the left and right walls are sharpened. The lower end portion can be inserted into and removed from the concave groove.

According to a fourth aspect of the present invention, in the plastic corrugated cardboard box according to any one of the first to third aspects, the lower ends of the left and right walls are arranged on one surface of the left and right walls in a plastic corrugated ruled line heat processing machine. After abutting the heated blade, both sides of the abutting portion are bent to the other surface side of the left and right walls, thereby forming a double structure portion having a pointed tip in a mountain shape.

In the plastic cardboard box of the present invention, since the lower edge of the upper and lower walls and the upper edge of the lower part of the front and rear walls divided into two parts are connected by the pinching prevention hinge member, when assembling the box, There is no risk of a finger being caught between the lower edge of the lower part and the upper edge of the lower part.

Further, according to the plastic cardboard box of the present invention in which concave grooves are formed in the left and right end portions of the bottom wall and the sharp lower ends of the left and right walls are detachable from the concave grooves, the special member as in the prior art is used. The box can be folded and assembled without using a complicated fitting structure.

  Next, although embodiment of this invention is described according to drawing, this invention is not limited to this embodiment.

  As shown in FIG. 1, a plastic corrugated cardboard box 1 according to this embodiment includes front and rear walls 2, 3, left and right walls 4, 5 and a bottom wall 6. The front and rear walls 2 and 3 are divided into upper and lower parts, and the lower edges 2a and 3a of the upper parts 2A and 3A and the upper edges 2b and 3b of the lower parts 2B and 3B are connected by a hinge member 7 described later. Through holes 8 are formed in the left and right walls 4 and 5, and substantially ring-shaped handle members 9 are attached to the through holes 8.

  In addition, a portion near the upper and lower ends of the front and rear walls 2 and 3 and a portion near the upper ends of the left and right walls 4 and 5 are respectively provided with half cuts 10 that are cut from the outer surface toward the inner surface.

An L-shaped frame member 30 is attached to the lower left and right corners 11 of the plastic cardboard box 1. Further, an L-shaped corner member 12 is attached to the upper edge corner of the plastic cardboard box 1 as viewed from above, and a U-shaped frame member 13 is fitted between adjacent corner members 12. In the figure, reference numeral 14 denotes a rivet for connecting the corner member 12 and the frame member 13 fitted therein.

As shown in FIG. 2, as described above, the rear wall 3 is composed of the upper part 3A and the lower part 3B, and the lower edge 3a of the upper part 3A and the upper edge 3b of the lower part 3B are hinge members. 7 is fitted in a U-shaped portion 7 a and fixed with a rivet 15. The hinge member 7 allows the rear wall 3 to be folded.

Next, the hinge member 7 will be described in more detail. In the hinge member 7, the two U-shaped portions 7a are arranged so that their opening portions 7b are opposite to each other, and between the two U-shaped portions 7a. A substantially V-shaped intermediate wall 7c is provided to connect them together, and a constant gap S is formed between the U-shaped portions 7a. This gap S has an effect of not pinching a person's finger, and the hinge member 7 thereby functions to prevent pinching of the finger.

The upper edge 3c of the upper portion 3A is in a state of being half-cut 16 and bent, and the frame member 13 is fitted over the portion. The bottom wall 6 has a double structure of an upper cardboard 6A and a lower cardboard 6B, and the cardboards 6A and 6B are overlapped so that the directions of the hollow portions intersect with each other, and the strength of the bottom wall 6 is improved. It is made to do. The lower corrugated cardboard 6B and the lower side 3B of the rear wall 3 have a structure that is integrally continuous. The structure described for the rear wall 3 is the same for the front wall 2.

As shown in FIG. 3, as described above, the right side wall 5 has a handle member 9 attached to a portion slightly above the center thereof, and the upper edge 5a of the right side wall 5 is half cut 18 and bent. The frame member 13 is fitted over the portion. Further, as described above, the half-cut 10 is also made on the right side wall 5 on the lower side of the frame member 13. Further, the lower portion of the right side wall 5 is a double structure portion 20 that is bent by a processing method to be described later, and its tip 5b has a mountain-like shape. In the figure, reference numeral 40 denotes a rivet for joining the double structure portion 20.

That is, the processing method of the double structure part 20 will be described. As shown in FIG. 4A, a heated blade B in a plastic cardboard ruled line heat processing machine is formed on one surface 19a of the plastic cardboard 19 serving as the right side wall 5. , The V-shaped groove 41 is formed over the entire length of the plastic corrugated cardboard 19, and then both sides of the abutting portion of the blade B on the plastic corrugated cardboard 19 are directed to the other surface 19 b side (arrow direction) of the plastic corrugated cardboard 19. By bending, a double-structure part 20 having a sharp tip 5b as shown in FIG. 4B is formed, and then the right-hand side is joined by driving the rivet 40 to join the double-structure part 20. The lower part of the wall 5 is formed. The left side wall 4 is also configured in the same manner as described above.

As shown in FIG. 3, the bottom wall 6 is composed of the upper cardboard 6A and the lower cardboard 6B as described above, but the upper cardboard 6A is shorter than the lower cardboard 6B. The L-shaped frame member 30 is attached to the left and right ends of the bottom wall 6 with the rivets 21, so that the groove 22 is formed by the standing wall 30 a of the L-shaped frame member 30 and the bottom wall 6 of the structure. . The pointed tip 5b of the right side wall 5 is fitted into the concave groove 22, and the right side wall 5 is swung leftward (arrow direction) with the upper end 5a as a fulcrum. Is folded inward of the plastic cardboard box 1. In this way, by fitting the front end 5b of the right side wall 5 in the concave groove 22, no special member is required, that is, without increasing the number of parts, the front end 5b is attached to the bottom wall 6. It can be locked against.

Next, the folding procedure of the plastic cardboard box 1 will be described. First, as shown in FIG. 5, the left and right walls 4 and 5 are swung inward of the plastic cardboard box 1, and in this state, as shown in FIG. By folding the front and rear walls 2 and 3 via the hinge member 7, the plastic cardboard box 1 is completely folded as shown in FIG.

In the figure, reference numeral 25 denotes a strip-shaped reinforcing piece fixed by rivets 26 to both inner surface ends of the left and right walls 4 and 5.

   The plastic corrugated cardboard box of the present invention can be manufactured at a low cost with a simple configuration, has the same function as the conventional product, and has various practical advantages such as no risk of pinching fingers during assembly. Therefore, it can be expected to be used widely.

It is a perspective view of the plastic cardboard box of the present invention. It is a vertical sectional view of the rear wall part in the plastic corrugated cardboard box. It is a vertical sectional view of the right side wall part in the plastic corrugated cardboard box. It is a figure which shows the manufacturing method of the lower end part of the right-and-left wall in the plastic corrugated cardboard box. It is a perspective view of the plastic cardboard box in the state where the left and right walls are folded. Furthermore, it is a side view of the plastic cardboard box in a state where the front and rear walls are folded. It is a perspective view of the plastic cardboard box of the state folded completely.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic cardboard box 2 Front wall 3 Rear wall 4 Left side wall 5 Right side wall 6 Bottom wall 7 Hinge member 12 Corner member 13 Frame member

Claims (4)

It consists of front and rear walls, left and right walls, and bottom wall, corner members are attached to the corners of the upper edge, frame members are fitted between adjacent corner members, and the front and rear walls are divided into two parts so that they can be folded. In plastic cardboard boxes that are swingable inward with their upper edges as fulcrums, the upper and lower parts constituting the front and rear walls are connected by a finger pinching prevention hinge member that prevents fingers from being pinched. A plastic cardboard box.   The finger pinching prevention hinge member has two U-shaped portions into which the lower edge of the upper and lower walls and the upper edge of the lower wall of the front and rear walls are fitted, and an intermediate wall formed between the two U-shaped portions. The plastic corrugated cardboard box according to claim 1 which is a thing.   A concave groove is formed in the left and right end portions of the bottom wall, the lower end portions of the left and right walls are pointed, and the lower end portion can be inserted into and removed from the concave groove. Plastic cardboard box as described.   The lower ends of the left and right walls have a chevron at the front end by abutting the heated blades of a plastic corrugated ruled line heat processing machine on one side of the left and right walls, and then bending both sides of the abutting part to the other side of the left and right walls. The plastic corrugated cardboard box according to any one of claims 1 to 3, wherein the plastic corrugated box is a double-structured portion having a sharp point.

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