JPH10194312A - Locking device of container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device of a container which is not deformed even after repeated locking operation and which can lock without pressing the same hard. SOLUTION: The container 1 comprises a box shape container main body 2 and a cover body 3. The cover body 3 can be opened from the container main body 2 freely by a hinge 4. A locking device which holds the cover body 3 to keep the container 1 in a closed condition comprises a catch projection 7 formed on the side wall (c) of the container main body 2 and a tab shape catch piece 6 provided standing and integrally with the fitting face of the cover body 3 so that the same covers the locking projection of the container main body 2 when the cover body 3 is closed. The locking piece 6 is provided with a locking hole 8 at the position where the locking projection 7 fits when the container main body 2 and the cover body 3 are closed. The locking piece 6 has enough rigidity for restoration against bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a container comprising a box-shaped container body and a lid closing an open upper portion of the box-shaped container body.

[0002]

2. Description of the Related Art Conventionally, as a locking device for a container, a locking portion is provided standing upright on a lid body in parallel with a mating surface via a thin hinge at a base end portion of a locking piece. Is known (see Japanese Utility Model Laid-Open No. 4-46820).

In the above-mentioned locking device, since the base end of the locking piece is a thin hinge, the locking piece is deformed due to fatigue of the hinge when the locking operation is repeatedly performed. However, there is a problem that the locking work cannot be performed, and in the worst case, it is broken. Further, in order to perform the locking operation, it was necessary to strongly press the locking piece to lock. As means for solving these problems, there has been proposed a method in which both ends of a thin hinge are formed so as to expand toward the width of the locking piece (see Japanese Utility Model Publication No. 7-6106).

[0004]

However, when the both ends of the thin hinge are formed so as to be divergent with respect to the width of the locking piece, the strength of repeated use of the locking piece is improved, so that the hinge is hardly broken. However, since the base end of the locking piece is still a thin hinge, it is not possible to prevent the locking piece from being deformed due to the fatigue of the hinge while performing the locking operation repeatedly. As a result, the problem of performing a normal locking operation and the problem of preventing breakage could not be solved. Further, the problem that the locking piece cannot be locked without strongly pressing the locking piece could not be solved.

[0005] In order to solve the above-mentioned problems, the present invention provides a locking member that is not deformed even if the locking operation is repeated, and is locked without strongly pressing the locking member. It is an object of the present invention to provide a locking device capable of performing the following.

[0006]

In order to achieve the above object, a container locking device according to the present invention comprises a box-shaped container body formed by blow molding a thermoplastic resin and an open upper portion of the box-shaped container body. A container having a hinge between the container body and the lid, the hinge being capable of opening and closing the lid with respect to the container body, and a locking device for holding the lid in a closed state. The locking device comprises a locking projection formed on a side wall of the box-shaped container main body, and a tongue piece which stands upright with a mating surface of the lid so as to cover the locking projection of the container main body when the lid is closed. A locking hole formed at a position corresponding to a locking projection when the container body and the lid are closed, and formed in a tongue shape. Has sufficient rigidity to be able to recover from bending. Hike, then to the locking projection engaging piece with the engaging hole by resilient locking pieces come to positions corresponding to the engaging hole is engaged with fitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 and 2,
1 is a container. The container 1 is composed of a box-shaped container body 2 and a lid 3, all of which are formed by blow molding a thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, and ABS resin.

A thin hinge 4 integrally formed at the time of blow molding is formed between the box-shaped container body 2 and the lid 3 so that the lid 3 can be freely opened and closed. It has a locking device 5 for holding the lid 3 in a closed state.

In the structure of the locking device 5, a locking piece 6 and a locking hole 8 for locking with the container body 2 are formed on the lid 3 side. On the side of the container body 2, a locking projection 7 that is locked with the locking piece 6 is formed on the side wall c.

The locking device 5 of the present invention will be described below with reference to FIGS.

The locking piece 6 is a tongue piece integrally formed at the time of blow molding, having a resilience to bending having a function of repelling when it rides on the locking projection 7 at the time of locking.
The base end has the same thickness as the distal end. The upper surface of the locking piece 6 is formed in a straight line with the side wall c of the lid 3. Therefore, the base end of the locking piece 6 has the same thickness as the distal end, and the locking piece 6
Since the upper surface is formed in a straight line with the side wall c of the lid 3, the locking piece 6 has a restoring property, and has a rigid structure that does not deform even when repeatedly used.

The locking hole 8 is formed at a position inside the distal end of the locking piece 6 and at a position corresponding to the locking projection 7 when the container body 2 and the lid 3 are closed. It is locked with the stop projection 7.

The locking projection 7 is provided on the mating surface 15 of the container body 2.
From the direction of the front wall a of the lid 3. By forming a gentle slope, the locking piece 6 can easily ride on.

In the embodiment, the locking projections 7 are provided so as not to impair the appearance of the container and to prevent the locking pieces 6 from coming off by an external impact.
Is formed around the periphery of the container body 2 with a recessed side wall c of the container body 2. Further, the locking portion 9 is provided from the end of the mating surface 15 of the side wall c to the end of the front wall a so that the lid 3 can be smoothly opened and closed. However, the locking portion 9 does not necessarily need to be formed, and the side wall c may be kept flat.

Next, the locking operation of the container 1 of the present invention will be described with reference to FIGS.

In order to keep the lid 3 closed in the container body 2, first, the tip of the locking projection 7 is brought into contact with the tip of the locking piece 6 on the extension of the trajectory of the lid 3. Next, the tip of the locking piece 6 is moved along the gently inclined surface of the locking projection 7.
And the mating surface 15 of the lid 3 comes into contact with the mating surface 15 of the container body 2. Then, the locking hole 8 is fitted into the locking projection 7 due to the restoring property of the locking piece 6, and the lid 3 can be kept closed in the container body 2. Since the lid 3 can be held closed by the container body 2 on the extension of the trajectory of the lid 3, it is not necessary to strongly press the locking piece 6 and lock with the locking piece 7 as in the related art.

In the embodiment, the locking piece 6 is projected with the mating surface 14 of the lid 3 being flat, but cut off at both ends of the locking piece 6 as shown in FIG. When the notch 12 is provided with a notch, the position of the base end is farther by the amount of the cut than the locking piece 6 of FIG. Further, the locking operation can be performed smoothly.

As shown in FIG. 7, when the thin pieces 13 are integrally provided at both ends of the locking pieces 8, the durability of the locking pieces 8 is improved, and the thin pieces 13 are further provided with uneven corrugations. In this case, when the mating surface 14 of the lid 3 is flat,
Since the distance for bending when riding on the locking projection 7 is longer than that in the case where the locking projection is protruded, the resilience to bending of the locking piece 6 is further improved, and the locking operation can be performed smoothly.

The locking device of the present invention can be used as a locking device for containers and the like in addition to the containers described in the embodiments.

[0020]

According to the present invention, a box-shaped container body made of blow-molded thermoplastic resin and a lid closing the open upper part of the box-shaped container body are provided. A container having a hinge for opening and closing the lid with respect to the container body and a locking device for holding the lid closed, wherein the locking device is formed on a side wall of the box-shaped container body. A projection, and a tongue-shaped locking piece that stands upright with the mating surface of the lid so as to cover the locking projection of the container body when the lid is closed. A locking hole is formed at a position corresponding to the locking projection when the lid is closed, and the locking piece formed in the shape of a tongue has sufficient rigidity for restoring bending. When closing the body, first ride on the locking projection, then the locking projection comes to the position corresponding to the locking hole Since the locking piece fits into the locking hole and is locked by the resilience of the locking piece, even if the locking operation is repeatedly performed, the locking piece has a resilience to bending, so that the locking piece has a normal property. Since the locking operation can be performed, the locking piece does not break and the lid cannot be closed on the container main body, and further, the container main body can be closed on an extension of the trajectory of the lid. Thus, it is possible to obtain a container locking device that can be locked without strongly pressing the locking piece.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a locked state of the container.

FIG. 3 is a plan view of the locking device.

FIG. 4 is a sectional view taken along line AA ′ of the locking device before locking.

FIG. 5 is a sectional view taken along line AA ′ of the locking device after locking.

FIG. 6 is a perspective view showing a part of a lid according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a part of a lid according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Container main body 3 Lid 4 Hinge 5 Locking device 6 Locking piece 7 Locking projection 8 Locking hole 9 Locking part 10 Storage part 11 Concave part 12 Notch part 13 Thin piece 14 Fitting surface 15 Fitting surface a Fitting surface a Front wall b back wall c side wall

Claims (1)

[Claims] 1. A container-like container body formed by blow-molding a thermoplastic resin, and a lid for closing an open upper portion of the container-like container main body. A container having a hinge for opening and closing the body and having a locking device for holding the lid closed, the locking device includes a locking projection formed on a side wall of a box-shaped container body, and a lid. It consists of a tongue-shaped locking piece that stands upright with the mating surface of the lid so as to cover the locking projection of the container body when closed.
The locking piece is provided with a locking hole at a position corresponding to the locking projection when the container body and the lid are closed, and the locking piece formed in a tongue shape has sufficient resilience to bending. When the lid is closed, the locking device first rides on the locking projection, and when the locking projection comes to a position corresponding to the locking hole, the locking piece returns to the locking hole due to the resilience of the locking piece. A locking device for a container, wherein a locking piece is fitted and locked.