JP3087646U - Flap locking structure in packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flap locking structure in a simple packaging box which is easy to lock and hard to release. SOLUTION: The locking structure of the present invention is such that the peripheral walls of the box 1 are overlapped with each other, and a locking piece 19 provided on one peripheral wall 3 in the overlapping portion is provided with a locking hole 21 provided on the other peripheral wall 7. And a locking portion that locks and joins both peripheral walls. The locking piece 19 includes a locking flap 19a and a claw portion 19b protruding on both sides of the locking flap 19a. The locking hole 21 connects the claw portion 19b to the locking flap 19b.
This is a structure that is inserted outward from the center of a and locked. The width of the locking hole 21 in the locking direction corresponds to the width of the claw portion 19b in the locking direction.
9b is a width or interval corresponding to the interval in the insertion direction between the base ends.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention mainly relates to a flap locking structure in a packaging box for storing cakes and the like.

[0002]

[Prior art]

 Conventionally, in a packaging box as described above, a peripheral wall serving also as a lid or a cover is continuously provided on a box body, and when this peripheral wall is locked and fixed in a state of being superimposed on another peripheral wall, one side of the above-mentioned overlapping portion is used. There is known a structure in which a locking piece provided at the end of the peripheral wall is inserted into a locking hole provided in the other peripheral wall and fixed in a state where both peripheral walls are overlapped (for example, Japanese Utility Model Publication No. 58-58). -45217, JP-B-61-3775, and JP-A-60-136914.

In the above-mentioned known art, locking claws are provided on the left and right sides so as to form a T-shape at the tip of the flap of the locking portion in the tension locking direction, and the locking claws on both sides are connected to the other peripheral wall. It is to be inserted and locked in the locking hole or notch formed in.

[0004]

[Problems to be solved by the invention]

 The above-described locking structure has the advantage that the T-shaped claw provided at the tip of the locking flap is locked on both the left and right sides, so that the locking force against pulling is strong, but the T-shaped claw is locked as it is. In the case of locking by pulling further to the locking position after being inserted into the hole, the locking state is loosened in the locking direction by the amount of pulling movement to the locking position, and the locking claw is There is a disadvantage that the lock is easily released by being returned to the original position.

In order to prevent the detachment, as shown in Japanese Utility Model Application Laid-Open No. 136914/1985, it is necessary to provide a retaining piece for preventing the detachment from being provided on the locking hole side. However, there is a drawback in that the stand does not function as a holding piece.

The present invention provides a locking structure that solves these problems, and a folding packaging box that does not collapse so that the locking structure functions sufficiently.

[0007]

[Means for Solving the Problems]

 The locking structure of the present invention for solving the above-mentioned problem is as follows. First, the peripheral walls of the box 1 are overlapped with each other, and the locking piece 19 provided on one of the peripheral walls 3 at the overlapping portion is attached to the other peripheral wall. 7 has a locking portion that is inserted into the locking hole 21 provided in the locking member 7 and locks and joins both peripheral walls, and the locking piece 19 projects to the locking flap 19a and both sides of the locking flap 19a. The locking hole 21 has a structure in which the locking portion 21b is inserted outward from the center of the locking flap 19a and locked.

Second, the width of the locking hole 21 in the locking direction corresponds to the width of the locking portion 19b in the locking direction, and the width or interval in the insertion direction is the insertion between the base ends of the claw portions 19b. It is characterized by a width or spacing corresponding to the spacing in the direction.

Third, the locking holes 21 are characterized by a pair of cut holes cut at intervals corresponding to the intervals between the base ends of the pair of claw portions 19b.

[0010] Fourth, the locking holes 21 are arranged in a C shape, and the base end of the claw portion 19b is formed with a C shape fold corresponding to the C shape.

Fifth, a box 1 is square or rectangular bottom plate 2, and peripheral walls 3 to 6 connected to the bottom plate 2 so as to be able to bend and undulate, and is connected to one upper end of the peripheral wall so as to be openable and closable. The locking portion is provided on the lid 7 and the peripheral wall 3 located on the opening / closing end side of the lid 7.

Sixth, at the upper ends of the peripheral walls 3 to 6 other than the lid 7, peripheral portions 12, 13 which are bent inward to form the peripheral portion of the opening of the box body 1 are provided continuously, At the ends of the peripheral portions 12, 13, peripheral locking portions 14, 16 for maintaining the bent state of the peripheral portion and the standing state of the peripheral wall are provided, respectively.

Seventh, adjacent peripheral walls are partially adhered and fixed in advance by connecting flaps 8, and when the box 1 is folded onto the fixed peripheral walls 3, 5, 6 and the peripheral edges 12, 13, the peripheral wall 5 is folded. , 6 and the peripheral portion 12 are provided with folds 9 which are folded inward.

[0014]

[Embodiment of the invention]

 The present invention will be described in detail below. 1 to 3 show an embodiment of the present invention. A paper box 1 has a rectangular or square bottom plate 2 and rectangular or square front, rear, left and right peripheral walls 3, 4, 5, 6 can be bent up and down. At the upper end of the rear wall 4, an upper wall 7 serving as a lid having the same shape as the bottom plate 2 is provided so as to be bendable.

A connecting flap is provided on the left and right ends of the rear wall 4 together with the left and right walls 5 and 6, and a part of the outer surface on the inner surface is bonded and fixed to a part of the inner surface of the left and right walls 5 and 6 by an adhesive portion 8 a. Reference numerals 8, 8 are connected to bend freely.

The left and right walls 5 and 6 are provided with inward (valley lines on the outside) folds 9 in a direction that substantially divides the rear bottom corner into two equal parts. The box body 1 can be folded in the direction of the arrow in FIG. 1 by being superimposed on the bottom plate 2 and the front wall 2. Is provided.

The creases between the bottom plate 2 and the left and right walls 5, 6 are provided with linear claw holes 10 along the creases, respectively. Each of the hooks 8b is fitted and locked in the claw hole 10 in the upright state, and the connecting flap 8 and the right and left walls 5, 6 are each provided with a claw 8b protruding therefrom.

Further, at the front ends of the left and right walls 5, 6, an auxiliary flap 11 that overlaps with the inner surface of the upright front wall 3 in a state where the left and right walls 5, 6 and the front wall are bent inward in an upright state. At the upper end of the wall 3, band-shaped peripheral edges 12, 12, 13 are respectively connected so as to be bendable, and the fold 9 is also extended to the left and right peripheral edges 12, 12.

At the front end of each of the left and right peripheral edges 12 and the left and right ends of the front part, adjacent peripheral walls are erected so that the peripheral walls 12 and 13 can be disengaged in a state of being horizontally bent. Peripheral locking portions 14 and 16 are provided, each of which is a hook that stops and maintains the standing state of each peripheral wall.

In the state where the peripheral portions 12 and 13 are locked, in the assembled state of the box 1, together with the connecting flap 8, the fold 9 is expanded to hold the left and right walls 5 and 6 in a single plane plate shape. It also has a function of maintaining the rigidity of the box 1.

The right and left and front ends of the lid 7 are connected to U-shaped lid peripheral walls 17 and 18 in a state of standing upright with respect to the lid 7, and the adjacent adjacent ends of the lid peripheral walls 17 and 18 intersect each other in FIG. As shown in the figure, the cover 7 is connected to the cover 7 by an adhesive or the like so that the cover can be folded and folded (note: hatched portions in FIGS. 1 and 2 are bonded portions), and the cover peripheral walls 17 and 18 are as shown in FIG. , Are fitted to the outer periphery of the upper end of the peripheral walls 3, 5, 6.

At a substantially central upper end side of the front wall 3, a substantially T-shaped locking piece 19 is cut out (uncut formation), and the locking piece 19 includes a vertical locking flap 19 a and an upper end thereof. The locking flap 19a has a claw 19c formed at the base end (lower end) of the locking flap 19a so that the front end can be pushed out to the outer peripheral surface side so as to be undulated. The upper end and the left and right ends are rounded so that the outer periphery forms an arc shape, and the left and right ends thereof are provided with claw portions 19b through crests 19d of a mountain line formed in a C shape. The fold 19d is for slightly bending the claw 19b itself when the claw 19 is inserted into the locking hole 20, as described later.

On the other hand, the lid 7 is fitted into the opening of the box 1 assembled by erecting the peripheral walls 3 to 6, and the lid is closed. It is fitted in a state of being inserted between the piece 19. At this time, on the lid peripheral wall 18 in a state in which the lid 7 is fitted to the deepest part, at the position corresponding to the fold 19d of the locking piece 19, a C-shaped locking hole for inserting the claw 19b in the outward direction is provided. 21 is cut in a line shape.

As shown in FIG. 3, the lid 7 is bent slightly into the right and left claws 19 b and inserted into the locking hole 21 from the tip to the deepest portion, so that the lid 7 is locked to the locking piece 19 on the front wall 3 side. It is locked and fixed to.

As shown in the figure, the locking hole 21 has a straight-shaped portion having a C-shape and an inwardly curved portion having hook-like ends at both ends. This allows a smooth insertion when the claw portion 19b is inserted. This is because the locking hole 21 is inserted and locked in a state where the width of the locking hole 21 and the width of the claw portion 19b in the locking direction match as much as possible, and the hole itself can be prevented from being damaged as compared with a mere straight hole. There are advantages. Also, since the C-shaped locking hole 21 and the C-shaped fold (line along the base end of the left and right claw portions 19b) on the locking piece 19 side substantially coincide with each other, insertion of the claw portion is prevented. It will be easier.

[0026]

[Effect of the invention]

 Since the locking structure of the present invention is configured as described above, when the flap-shaped peripheral walls of the box are locked in an overlapping state, the locking claws do not protrude from the peripheral surface or float. Therefore, there is an advantage that the peripheral wall can be securely locked and fixed, loosening and backlash are less likely to occur in the locking portion, and unlocking can be prevented.

Further, it is not necessary to form an opening-like hole for inserting the locking claw, or even if the opening hole is formed, the hole is closed by the locking piece, so that entry of dust and the like from the outside can be prevented. There is no. In addition, there is an advantage that the rigidity of the box is high as a whole and the occurrence of shape collapse can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a configuration and a folded state of a packaging box of the present invention.

FIG. 2 is an overall perspective view of the packaging box in the same assembled state.

FIG. 3 is a front view showing the structure of the locking portion of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Bottom plate 3-7 Peripheral wall 8 Connecting flap 9 Fold 12, 13 Peripheral edge 14, 16 Peripheral edge locking part 17, 18 Lid peripheral wall 19 Locking piece 19a Locking flap 19b Claw 19c Folding 21 Locking hole

Claims (7)

[Utility model registration claims] 1. The peripheral walls of a box (1) are overlapped with each other,
In the overlapping portion, a locking piece (19) provided on one peripheral wall (3) is replaced with a locking hole (21) provided on the other peripheral wall (7).
And a locking portion that locks and joins the two peripheral walls, the locking piece (19) is provided with a locking flap (19a).
And a claw (1) protruding on both sides of the locking flap (19a).
9b), and the locking hole (21) is provided in the claw portion (19).
b) A flap locking structure in a packaging box in which b) is inserted outward from the center of the locking flap (19a) and locked. 2. The width of the locking hole (21) in the locking direction corresponds to the width of the claw (19b) in the locking direction, and the width or interval in the insertion direction is the base end of the claw (19b). The flap locking structure in a packaging box according to claim 1, wherein the width or the interval is corresponding to the interval in the insertion direction between them. 3. The locking hole (21) has a pair of claws (19).
3. The flap locking structure for a packaging box according to claim 1 or 2, wherein the pair of cut holes are cut at intervals corresponding to the interval between the base ends in (b). 4. The locking hole (21) is arranged in a C shape,
4. The flap locking structure according to claim 1, wherein the base end of the claw (19b) is formed with a C-shaped fold corresponding to the C-shaped. 5. A box (1) having a square or rectangular bottom plate (2), peripheral walls (3) to (6) connected to the bottom plate (2) so as to be able to be bent and raised, and one upper end of the peripheral wall And a peripheral wall (7) which also serves as a lid, which is connected to the lid (7) so as to be openable and closable. The flap locking structure in the packaging box according to claim 1, 2, 3, or 4. 6. A peripheral wall (3) to (6) other than the lid (7).
Peripheral parts (12) and (13) which are bent inward to form the peripheral part of the opening of the box body (1) are continuously provided at the upper end of the peripheral part, and each of the peripheral parts (12) and (13) which intersect and are adjacent to each other The flap member in the packaging box according to claim 1, 2, 3, 4, or 5, wherein the end portions are provided with peripheral locking portions (14) and (16), respectively, for maintaining the bent state of the peripheral portion and the standing state of the peripheral wall. Stop structure. 7. Adjacent peripheral walls are partially adhered and fixed in advance by connecting flaps (8), and the fixed peripheral walls (3), (5), (6) and peripheral portions (12), (1) are fixed.
3) When the box (1) is folded, the peripheral walls (5) and (6)
7. The flap locking structure in a packaging box according to claim 6, wherein a fold (9) is provided so that the peripheral portion (12) is folded inward.