JPH09221123A - Bottom lock carton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bottom lid from opening inwardly by facilitating assembling of the bottom lid of a bottom lock carton and heightening the locking function of the bottom lid. SOLUTION: On one main flap 2, other main flap 3 is folded over. When a tongue piece 7 which protrudes to the head end center of the upside main flap 3 is pushed into a lower part of a tongue piece 6 which protrudes to the head end center of the downside main flap 2, the main flaps 2 and 3 are made to bite into each other in a scrummed state by the tongue pieces 6, 7 and collar pieces 8R, 8L, and 9R, 9L which are protruding at respective both sides of the tongue pieces 6 and 7. At the same time, lock holes 10R, 10L and 11R, 11L formed at the boundaries of the tongue pieces and the collar pieces bite each other, so that a bottom lid is locked into a blocked state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a structure of an assembly box having flaps for forming a top cover and a bottom cover using materials such as cardboard and hard plastic sheets, and is used as a container for assembling the product by assembling it. Carton,
In particular, it relates to a bottom lock carton in which a bottom lid assembled by folding a flap is locked in a closed state.

[0002]

2. Description of the Related Art A bottom lock carton is an assembled box that is manufactured for convenience of transportation and storage by opening the top lid and disassembling the bottom lid to crush the entire box flat. When used, the bottom lid is assembled before the contents such as products are packed in a box. Therefore, if it takes a lot of time to assemble the bottom lid, the efficiency of the product boxing work is significantly reduced. Therefore, the bottom lid is easily assembled with one touch, and the bottom lid is designed to be locked in the closed state at the same time as the assembly is completed. .

As a conventional example thereof, a bottom lock carton shown in FIG. 5 has a pair of front and rear main flaps 51 and 52, which are bottom lids, and a pair of left and right side flaps 53, which are bottom lids, at a bottom opening end of a rectangular tubular portion 50 which is a box body. 54 are projected, and the flaps are folded according to the procedure of FIGS. 5 to 6 to assemble the bottom lid as shown in FIG.

That is, first, as shown in FIG. 5, a main flap 51, which is a concave piece 55 cut out so as to recess the center of the tip, is folded inward. Then, as shown in FIG. 6, the side flaps 53, 54 are folded inward, and at the same time, hook-shaped jaw pieces 56, 56 forming the tips of the side flaps 53, 54.
However, by overcoming the left and right ends of the concave piece 55 of the main flap 51, pushing the concave piece 55 underneath, and biting into the main flap 51, the main flap 51 and the side flaps 53, 54 are integrally joined.

The main flap 51 is provided at the center of the tip.
Main flap 52 formed in a notched shape having a convex tongue 58 that matches the recess 57 of the concave piece 55 of
Is folded inward, and its tongue piece 58 rides over the concave piece 55 of the main flap 51 and is pushed downward, so that the main flap 51 and the side flaps 53,
The bottom lid locked as shown in FIG. 7 is completed by biting in between 54 and 54.

[0006]

However, the bottom cover as described above is relatively easy to assemble, but has a weak locking function. When the acting force is applied, the locked state may be easily released and the bottom may open inward. That is,
One of the main flaps 51 that forms the bottom lid is a recess 57 that is located in the center of the bottom lid and has no recess.
The other main flap 52 has a tongue piece 58 located at the center of the bottom lid pushed into the inside of the main flap 51, so that the bottom lid can be used when packaging the product or handling the packaged product. If you press or hit a hard object on the bottom cover, the bottom cover will open inside easily.

For this reason, the entire bottom lock carton is deformed and distorted, the contents packed in the bottom lock carton fall out of the bottom, or the contents made of a light and soft material such as corsage are put inside. Occasionally, there was damage such as being crushed and deformed by the open bottom lid. Therefore, the present invention has a technical object to make the bottom lid of the bottom lock carton a structure that is easy to assemble and has a strong locking function.

[0008]

In order to solve the above-mentioned problems, the present invention relates to a bottom lid assembled by a pair of front and rear main flaps and a pair of left and right side flaps projecting from the bottom opening end of a rectangular tubular portion. Is a bottom lock carton that is locked in a closed state, in which the tips of the main flaps that fold over each other from the inside and the outside of the bottom have tongue pieces that project in the center and left and right sides that project from both sides of the tongue pieces. It is formed into a notched shape with a pair of collar pieces, and a substantially circular lock hole is formed by making a notch at the boundary between the tongue piece and the collar piece, with one main flap facing down and the other on top. When the tongue piece formed on the upper main flap is pushed under the tongue piece formed on the lower main flap, the lock holes formed on both sides of the tongue pieces. Each other Bite each other in the bottom lid, characterized in that it is locked.

According to the present invention, when one main flap is placed downward and the other main flap is folded on top of it, the tongues projecting to the center of the tip end portions of both main flaps and the respective tongues are projected. A pair of left and right collar pieces projecting from the side roots overlap each other from the inside and outside of the bottom. That is, in both main flaps, the tongue pieces overlap each other, and the left and right collar pieces protruding to both sides of the tongue pieces also overlap each other, forming a bottom lid having a two-layer structure in the central portion.

Then, when the tongue piece formed on the upper main flap is pressed by the fingertip and pushed under the tongue piece formed on the lower main flap, the upper main flap becomes the lower main flap. The tongue piece formed on the flap and the collar piece are sandwiched, and the lower main flap is also sandwiched between the tongue piece and the collar piece formed on the upper main flap. In other words, both main flaps have a structure like a paper clip with the central tongue and the left and right collars,
By inserting the clips, both of them are in a state of being clamped to each other. At the same time, the lock flaps of both main flaps are formed by cutting in the boundary between the tongue piece and the collar piece, and the bottom lids are locked.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 3 are views showing an example of the construction of a bottom lock carton according to the present invention and a procedure for assembling the bottom lid, and FIG. 4 is a partially enlarged view of a main flap forming the bottom lid.

The bottom lock carton shown in FIGS. 1 to 3 is formed by assembling a cardboard box or a hard plastic sheet into a box, and the front and rear sides of the box body projecting from the bottom opening end of the rectangular tube portion 1 serving as the box body. The bottom lid is assembled by the pair of main flaps 2 and 3 and the pair of left and right side flaps 4 and 5.

The main flaps 2 and 3 have arcuate tongues 6 and 7 projecting in the center and tip ends on both sides of the respective tongues 6 and 7 in which the tips of the main flaps 2 and 3 are folded over from the inside and the outside. The lock holes 10R and 10L, 11R and 10R and 10L, 11R and 11L is formed.

As shown in the enlarged view of FIG. 4B, the main flap 2 has lock holes 10R and 10L formed at the boundary between the tongue piece 6 and the collar pieces 8R and 8L, respectively.
By being formed eccentrically on the R and 8L sides, each collar piece 8
Claw-shaped hooks 12R and 12L are formed at the roots of R and 8L, respectively. The main flap 3 is shown in FIG.
As shown in the enlarged view of (a), the tongue piece 7 and the collar pieces 9R and 9L are shown.
The lock holes 11R and 11L formed at the boundaries of the tongue pieces 7 are formed eccentrically on the tongue piece 7 side, respectively, so that the claw-shaped hooks 13R and 13L are formed at both sides of the tongue piece 7, respectively. The whole is shaped like a cervical neck.

As shown in FIG. 1, the main flap 2 is folded inward, and the main flap 3 is folded so that the main flap 3 is superposed on the main flap 2 by pressing the tongue piece 7 of the main flap 3 with a fingertip. When pushed below the tongue piece 6 of the main flap 2 as shown in FIG. 3, the upper main flap 3 is separated from the tongue piece 6 formed on the lower main flap 2 and the collar pieces 8R and 8L. In between, it is sandwiched as if it was sandwiched by a paper clip, and the lower main flap 2 is also
Tongue piece 7 and collar piece 9 formed on the upper main flap 3
The main flaps 2 and 3 are sandwiched between R and 9L like a paper clip, and the main flaps 2 and 3 have central tongue pieces 6 and 7 as if they were the head and left and right collar pieces as the arms. 8R
And 8L, 9R, and 9L are joined in a state where the scrums are combined.

At the same time, the lock holes 10R, 10L formed at the boundary between the tongue piece 6 of the main flap 2 and the collar pieces 8R, 8L, the tongue piece 7 of the main flap 3 and the collar pieces 9R, 9L. Rock hole 11 formed at the boundary of
The R and 11L engage with each other like a chain ring, and the bottom lid is locked. The lock hole 10
The occlusal state of R, 10L and the lock holes 11R, 11L includes hooks 12R, 12L formed on the collar pieces 8R, 8L of the main flap 2 and hooks 13R formed on both sides of the tongue piece 7 of the main flap 3. , 13L, so that it is firmly held.

Next, the side flaps 4, 5 are folded so as to be interposed between the main flap 2 and the main flap 3, and each of the collar pieces 8R, 8 of the main flap 2 is folded.
When folded on L, the tip corners of the respective jaw pieces 14, 14 reach the tongue piece 6 of the main flap 2 and are formed so as to locally overlap therewith. And
Each jaw piece 14, which overlaps the tongue piece 6 of the main flap 2,
14 are pushed under the tongues 6 as shown in FIG. 2 by pressing each with their fingertips, whereby each side flap 4, 5
Are sewn into the main flap 2 and joined. Further, the side flaps 4 and 5 are changed from the state of FIG.
The tongue 7 of the main flap 3 is the main flap 2
The main flap 3 when pushed under the tongue 6 of the
Holes 11 formed on both sides of the tongue 7
The respective jaw pieces 14, 14 bit into the R, 11L and are also joined to the main flap 3.

The procedure for assembling the bottom lid shown in FIGS. 1 to 3 will be described below. First, as shown in FIG. 1, the main flap 2 is folded inward, the left and right side flaps 4, 5 are folded on top of each other, and each jaw 14 of the side flaps 4, 5 is pressed with a fingertip. , Each jaw 14 is pushed under the tongue 6 of the main flap 2, as shown in FIG. Then, as shown in FIG. 2, the main flap 3 is folded inward and folded over the main flap 2, and the tongue 7 of the main flap 3 is pressed with a fingertip,
Push it under the tongue 6 of the main flap 2. As a result, the bottom cover as shown in FIG. 3 is assembled and at the same time,
The bottom lid is locked closed.

In the locked state of the bottom lid, the main flaps 2 and 3 mainly assemble the scrums with the tongue pieces 6 and 7 at the center of the tip and the collar pieces 8R, 8L and 9R, 9L on the left and right of the tip. The lock holes 10R and 10 formed on both sides of the tongues 6 and 7 at the same time when they are joined to each other.
It is obtained by the fact that L and 11R and 11L occlude each other. And the central part of the bottom lid is the main flap 2,
Tongue pieces 6 and 7 formed at the center of the tip of 3 and collar piece 8
R, 8L and 9R, 9L have a two-layer structure in which the bottom and the bottom are overlapped with each other, and the tongue piece 6,
The overlapping of 7 is firmly held by the interlocking of the lock holes 10R, 10L and 11R, 11L formed at the respective roots of both sides. Therefore, the bottom lock carton according to the present invention has an advantage that the bottom cover is easily assembled and the locked state of the bottom cover is very strong.

[0020]

According to the present invention, when a product is packed in a bottom lock carton, or when a product packed in a bottom lock carton is transported, displayed, or sold, its bottom lid opens to the inside. It has a very excellent effect that it can reliably prevent damage such as deformation of the lock carton, falling of the product packed in the bottom lock carton from the bottom, or being crushed and deformed by the bottom lid that opens inside. .

[Brief description of drawings]

FIG. 1 is a diagram showing an example configuration of a bottom lock carton according to the present invention and a procedure for assembling a bottom lid thereof.

FIG. 2 is a diagram showing an example configuration of a bottom lock carton according to the present invention and a procedure for assembling the bottom lid.

FIG. 3 is a diagram showing an example configuration of a bottom lock carton according to the present invention and an assembly procedure of the bottom lid thereof.

FIG. 4 is a partial enlarged view of a main flap forming a bottom lid of a bottom lock carton according to the present invention.

FIG. 5 is a view showing a conventional example of a bottom lock carton and a procedure for assembling the bottom lid.

FIG. 6 is a view showing a conventional example of a bottom lock carton and a procedure for assembling the bottom lid.

FIG. 7 is a view showing a conventional example of a bottom lock carton and a procedure for assembling the bottom lid.

[Explanation of symbols]

1 ... Square tube 2 ... Main flap 3 ... Main flap 4 ... Side flap 5 ... Side flap 6 ... Tongue piece 7・ ・ ・ Tongue piece 8R ・ ・ ・ Collar piece 8L ・ ・ ・ ・ Collar piece 9R ・ ・ ・ ・ Collar piece 9L ・ ・ ・ ・ ・ ・ Collar piece 10R ・ ・ ・ Lock hole 10L ・ ・ ・ Lock hole 11R・ ・ ・ ・ Lock hole 11L ・ ・ ・ ・ ・ ・ Lock hole 12R ・ ・ ・ ・ Hook 12L ・ ・ ・ ・ Hook 13R ・ ・ ・ ・ Hook 13L ・ ・ ・ ・ Hook 14 ・ ・ ・ Jaw piece

Claims (3)

[Claims] 1. A bottom lid assembled by a pair of front and rear main flaps (2, 3) and a pair of left and right side flaps (4, 5) projecting from the bottom opening end of the rectangular tube (1) is closed. A bottom lock carton to be locked, wherein the tip ends of the main flaps (2, 3) that fold over each other from the inside and the outside of the bottom protrude to the center, and the tongue pieces (6). , 7) is formed into a notch shape having a pair of left and right collar pieces (8R and 8L, 9R and 9L) protruding from both side bases, and a cut is made at the boundary between the tongue piece and the collar piece to form a cutout shape. Circular lock holes (10R and 10L, 11R and 11L) are formed, one main flap (2) is faced down and the other main flap (3) is folded over, and the main flap (3) above it Attach the tongue piece (7) formed on the When pushed under the formed tongue (6) into (2), said locking hole (10R and 10L formed on both sides of Ryozetsu pieces (6, 7), 11
R and 11L) is a bottom lock carton characterized in that the bottom lid is locked by biting each other. 2. The one main flap (2) is formed such that the lock holes (10R and 10L) are eccentrically formed toward the collar pieces (8R and 8L), respectively. 8L) has claw-shaped hooks (12R, 12L) formed at the base thereof, and the other main flap (3) is formed such that the lock holes (11R and 11L) are eccentric to the tongue piece (7) side, respectively. By being
Claw-shaped hooks (13R, 13R) on both sides of the tongue (7)
The bottom rock carton of claim 1, wherein L) is formed. 3. The one main flap (2) is turned down and the other main flap (3) is folded on the main flap, and the tongue piece (7) formed on the upper main flap (3) is attached. When pushed under the tongue piece (6) formed in the lower main flap (2), the side flaps (11R, 11L) are formed in the lock holes (11R, 11L) formed in the upper main flap (3). Bottom rock carton according to claim 1, characterized in that the jaw pieces (14, 14) of 4, 5) bite into each.