JPS6112326Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper box in which both outer wall surfaces of the paper box can be formed into a gentle curve.

To specifically explain one embodiment of the paper box according to the present invention with reference to the drawings, in Fig. 1, there is a bottom plate (top plate) 1 at the center, and an outer plate 2 and an inner plate are arranged on the left and right sides via folding lines. 3 and the overlapping piece 4 are arranged in sequence,
Also, at the upper and lower ends of the bottom plate 1, there are outer gable plates 5, upper edge pieces 6,
The inner gable plate 7 and the overlapping piece 8 are arranged in sequence, and the outer gable plate 5 has an arc-shaped bulge a projecting from the center of both left and right ends, and furthermore, the inner gable plate 3 has a cutout at a predetermined position at its upper and lower ends. U-shaped notches 9 are provided in a row in the middle of the upper and lower ends of the inner plate 3, and a U-shaped notch c is formed inwardly, and a protrusion d is formed in the inside of the U-shaped notch c.
Therefore, this protrusion d projects from the base of the engaging tongue piece 9, forming a blank plate.

Next, in assembling the blank plate having the above structure, as shown in FIGS. 2 to 4, the inner and outer plates 3, 2
When the engaging tongue piece 9 is bent 90 degrees inward of the box after each of the tongue pieces 9 is raised, a protrusion d protruding from the base of the tongue piece 9 can be seen.
protrudes outward from the box, thereby pushing the center part of the outer plate 2 outward to curve the outer plate 2 so that the center part expands, and the engaging tongues 9 engage with each other, Furthermore, by standing up the outer gable plate 5, the bulge part a at the center is brought into contact with the curved part of the outer plate 2, and then by folding the upper edge 6, inner plate 7 and overlapping piece 8 in order. , it is possible to form a thick box with a good appearance and a curved bulge in the center of the outer surface of the side wall.

As shown in FIGS. 5 to 7, the box in the above embodiment has upper edges 1 on the left and right sides of a wide bottom plate 10.
1. The inner plate 12 and the overlapping plate 13 are arranged in series, and the upper and lower ends of the bottom plate 10 are provided with a folding plate 14, an outer gable plate 15, and an upper edge 1.
6. The inner gable plate 17 and the overlapping piece 18 are arranged in a row, the outer gable plate 15 is provided with a protruding portion a in the center on both left and right sides, and the upper and lower ends of the inner gable plate 12 are provided with locking protrusions e or corresponding thereto. The engagement tongue piece 19 having a hole f is continuously provided, and a U-shaped notch c is formed toward the center of the upper and lower ends of the inner plate 12, thereby forming a projection d inside the box. It is also possible to configure the outer surface of the side wall to be curved as in the previous embodiment.

As mentioned above, in the box according to the present invention, engagement tongues are provided protrudingly from the upper and lower ends of the inner plate, and a U-shaped notch is bored at the center of the upper and lower ends of the inner plate, so that the inside Since the protrusion 1 is provided and protrudes from the base of the engagement tongue, the protrusion can be automatically projected to the outside of the box by bending the engagement tongue. As a result, the central part of the outer plate is pushed outward and this part is curved, thereby automatically forming a box in which the outer surface of the side wall is curved outward.

[Brief explanation of the drawing]

FIG. 1 is a plan view, FIGS. 2 to 4 are assembly illustrations, and FIGS. 5 to 7 are illustrations of other examples. 1, 10: Bottom plate, 2, 3, 12: Side plate, 4,
8, 13, 18: Overlapping piece, 9, 19: Engaging tongue piece,
5, 7, 15, 17: end plate, c: notch, d: protrusion.

Claims (1)

[Scope of utility model registration request] An outer plate 2, an inner plate 3, and an overlapping piece 4 are successively arranged in order from the bottom plate 1 to the left and right via folding lines, respectively,
An outer gable plate 5, an upper edge piece 6, an inner gable plate 7, and an overlapping piece 8, each having an arcuate bulge a protruding from the center of the left and right ends at the upper and lower ends of the bottom plate 1, are arranged in sequence, and the upper and lower ends of the inner plate 3 are At the same time, an engaging tongue piece 9 having a notch b is provided in a row at a predetermined position of the inner plate 3, and an inwardly directed U-shaped notch c is bored in the center of the upper and lower ends of the inner plate 3, and a protrusion d is formed inside the U-shaped notch c. The inner and outer plates 3 and 2 are made to stand up, respectively, and the engaging tongue piece 9 is bent inward at 90 degrees, so that a protrusion d protruding from the base of the tongue piece 9 forms a blank plate. By pressing the central part of the plate 2 to curve the outer plate 2 and engaging the left and right engaging tongues 9 with each other to raise the outer gable plate 5, the bulging portion a is formed.
The paper box is assembled by abutting against the curved surface of the outer plate 2, and further folding the upper edge 6, inner plate 7 and overlapping plate 8 inward.