JPH0136736Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper box having side walls formed by folding double folds. Regarding the paper box on the wall.

[Prior art] Conventionally, this type of paper box was
The one shown in Publication No.-38558 is known. The paper box disclosed in Japanese Utility Model Publication No. 39-38558 has double side walls on all four sides, and locking pieces that are folded into the double side walls are provided on both sides of one pair of opposing sleeve pieces, and the other pair The sleeve piece is provided with a tongue piece longer than the height of the side wall, so that a plurality of boxes can be stacked while the side walls are pushed apart and the side walls are connected to each other via the tongue piece.

[Problem to be solved by the invention] By the way, in the above-mentioned conventional paper box, the side walls are locked to each other by a notch provided at the base of the tongue extending from one side wall and a folded back at the edge of the other side wall. This is done by engaging with a locking piece provided at the bottom. However, since the fold of the locking piece that the above-mentioned notch should lock is at the same height as the top of the side wall, it is extremely difficult to engage, and even once it is engaged, it quickly comes off, and there is no sufficient A locked state could not be obtained.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, provides a double-walled paper box in which the side walls are sufficiently engaged with each other, and is easy to assemble.

[Means for Solving the Problems] The present invention has been made in consideration of the above-mentioned problems, and in a paper box having double side walls made of folded cardboard, both side plates 4 and 5 are formed at their center folds, respectively. It is folded in half, has claw flaps 7, 7 symmetrical to each other on both side edges thereof, and has a low trapezoidal flap 10 at both ends of the outer plates 2a, 3a of the front and back plates 2, 3 on one side (outer side) of the oblique side. A folding line 11 is formed, and a rising piece 12 lower than the height of the box is placed on this folding line between below the top line of the trapezoid and the lower end of the base, and this trapezoidal flap 10 is folded over the back surface of the front and rear outer panels 2a and 3a. Then, the rising piece 12 is folded over the trapezoidal flap 10 and attached to the back surfaces of the front and back inner plates 2b and 3b to form the stacked double side walls (front, back plate, both side plates). The gist is a paper box in which the above-mentioned claw flap is inserted between the folded locking flaps 8 and the claws of the flaps are locked to the fold lines 11.

[Examples] The present invention will be described in detail below with reference to illustrated embodiments.

FIG. 1 is a plan view of a blank sheet of the paper box of the present invention, 1 is the bottom, 2 is the front plate, 2a is the front outer plate, 2b is the front inner plate, 3 is the back plate, 3a is the back outer plate, Reference numeral 3b denotes a back inner plate, and 4 and 5 side plates, both of which have outer side plates 4a, 5a and inner side plates 4b, 5b. 6 is the glue margin.

The front plate 2 and the back plate 3 are folded in half along the center fold line and stacked on top of each other, and the same goes for the side plates. The side plates 4, 5 have completely symmetrical claw flaps 7 on both sides thereof.
7, and locking flaps 8 for the claw flaps 7 are provided at both ends of the front outer plate 2a and the rear outer plate 3a.
8, this locking flap 8 has a trapezoidal flap 10 on the base fold line 9 with the front (dorsal) outer plate;
The cut on one hypotenuse coincides with the arcuate cut of the claw flap 7, and the other hypotenuse is a broken line 11, and a rising piece consisting of one side edge rising slightly below the apex of this hypotenuse and one side edge rising from the tip of the base. A blank sheet is produced by forming 12 with a dimension lower than the height of the box.

To assemble a paper box from such a blank sheet, first, the trapezoidal flap 10 is folded inside the front (back) outer plates 2a, 3a and attached thereto, and then the rising piece 12 is attached to the flap 10 through the fold line 11.
Fold it up and attach this flap 10 to the back side of the front (back) inner side plates 2b, 3b.
The inner and outer plates 2b, 2a, 3a, and 3b are folded over and a glue margin 6 is attached to the bottom. Each side wall is then folded in half and overlapped. Claw flap and positive (back)
The trapezoidal flaps 10 and rising pieces 12 of the locking flaps 8 on both sides of the outer side plates 2a and 3a are folded and pasted while maintaining the above-mentioned relationship. That is, FIG. 2 is a plan view of this state.

The locking flaps 8 (consisting of a trapezoidal flap 10 and a rising piece 12) folded into the front plate 2 or the rear plate 3 are stacked as shown in the explanatory diagram of FIG.
The part 3 is the opening part, and when each side wall is set up as shown in Fig. 4 and the claw flap 7 is inserted into the mating locking flap 8, the tip of the claw will be locked in the opening 13 shown in Fig. 3, so the paper box is assembled. . The claw flap is of double paper thickness and the lock is sufficiently strong. FIG. 5 is a perspective view of the paper box after assembly is completed.

[Effects of the invention] As described above, in the present invention, the claw flap reliably engages with the inclined fold line portion of the locking flap and does not come off easily, and a sufficient locking state of the side walls can be obtained. Therefore, the paper box can be assembled firmly. Furthermore, it is extremely easy to assemble, convenient for accumulation and transportation, and convenient for storage as it is easy to open the box to clean up after use.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the blank sheet of the paper box of the present invention, Fig. 2 is a plan view showing the state after folding and pasting, Fig. 3 is an explanatory diagram of the state of the locking flap folded, Fig. 4 5 is an explanatory diagram of the assembly of the paper box, and FIG. 5 is a perspective view of the paper box of the present invention after the assembly is completed. 1...Bottom, 2...Front plate, 2a...Front outer plate, 2b...Front inner plate, 3...Rear plate, 3a...
...Rear outer plate, 3b...Rear inner board, 4, 5...
Side plate, 4a, 5a... Side outer plate, 4b, 5b
...Inner side plate, 6... Glue allowance, 7... Claw flap, 8... Locking flap, 9... Broken line, 10...
Trapezoidal flap, 11... broken line, 12... rising piece, 13... opening (the tip of the claw flap is locked).

Claims (1)

[Scope of utility model registration request] In a paper box having double side walls made of folded cardboard, both side plates 4, 5 are each folded in half at the center fold, and symmetrical claw flaps 7, 7 are provided on both side edges. A low trapezoidal flap 10 is placed at both ends of the outer plates 2a and 3a of the face plates 2 and 3, with one side (outside) oblique side thereof as a fold line 11, and on this fold line, a rising piece 12 lower than the height of the box is placed below and below the top line of the trapezoid. The trapezoidal flap 10 is placed between the proximal ends, and the trapezoidal flap 10 is folded over and adhered to the back surfaces of the front and rear outer panels 2a and 3a.Then, the rising piece 12 is folded over the trapezoidal flap 10 to form the front and rear inner panels. 2
b, 3b, and put up the stacked double side walls (front, back plate, both side plates), insert the above-mentioned claw flap between the folded locking flaps 8, and tighten the claws of the claw flap. A paper box that is secured to the fold line 11.