JPH0447082Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a box-shaped synthetic resin container in which a lid is attached to the side edge of the container body with a hinge so that it can be opened and closed.

In a box-shaped container in which the container body and the lid are connected by a hinge, it is necessary to prevent the hinge from breaking due to repeated bending of the hinge portion that occurs each time the lid is opened and closed. It was made of good synthetic resin.

For this reason, there was a problem in that excellent synthetic resins such as styrene, acrylic, and ABS could not be used as materials for box-shaped containers.

In addition, conventional hinge installation methods involve attaching the hinge to both sides with adhesive, or protruding a hinge member with an engaging step at its tip on the lid side.
The hinge member was inserted into a receiving hole formed on the container body side and engaged integrally. In addition, in any case, the attachment is done after the container body and lid have been molded, so it is necessary to obtain the same.

This invention was devised in order to solve the above-mentioned conventional problems, and its purpose was to make the container body and lid with synthetic resin that has no relation to the hinge characteristics, even if they are connected by a hinge member. It is an object of the present invention to provide a synthetic resin container that integrally has a hinge of a new configuration, which can be formed by molding the container body and the lid, and the hinge member can be formed and attached at the time of molding the container body and the lid.

The feature of this invention for the above purpose is that a hole with a locking edge protruding toward the inner periphery is provided at the same position on the adjacent sides of the separate container body and lid made of synthetic resin, and A groove of a required depth is formed between the hole opening on the lower side of the edge and the side edge, and a hinge member made by injection molding of a synthetic resin with good hinge properties is provided across both grooves and the hole, and the hinge The container body and the lid are connected by a member.

This invention will be explained in detail below using illustrated examples.

In the figure, 1 is a flat box-shaped container body, 2 is a plate-shaped lid, and 3 is a hinge member.

The container body 1 and the lid 2 are made of synthetic resin such as styrene, acrylic, or ABS, and the hinge member 3 is made of synthetic resin such as polypropylene or butadiene-styrene copolymer resin.

The container body 1 and the lid body 2 are separate bodies, and holes 4, 4 each having a rectangular planar shape with a locking edge 3c formed to protrude inwardly are provided at the same position on the adjacent side.
Grooves 5, 5 having a required depth are formed between the hole opening on the lower side of the locking edge 3c and the side edge.

Further, the connecting portion 3a of the hinge member 3 is attached to the locking edge 3c in the holes 4, 4 of both the container body 1 and the lid 2.
The undercut portion is locked and fitted into the groove portions 5, and the band portion 3b of the hinge member 3 is fitted into both groove portions 5, 5.

As a result, the container body 1 and the lid body 2 are connected to the hinge member 3.
They are integrally connected by.

FIG. 4 shows an example in which the molding of the container body 1, the lid body 2, and the hinge member 3, and the molding and locking of the hinge member 3 are performed in one mold.

The above-mentioned mold has mold cavities 8 and 9 for molding the container body 1 and the lid body 2 between the fixed mold 6 and the movable mold 7, and resin channels 11 and 12 are formed on the fixed mold side of the cavities 8 and 9. An injection port is provided.

In addition, a large core 13 that spans both cavities 8 and 9 is provided in the fixed mold on the side adjacent to both cavities 8 and 9 so as to be able to move forward and backward. In this case, small cores 14, 14 each having a protrusion for forming a protruding edge on the distal end surface are arranged opposite to each other so as to be movable forward and backward.

The small cores 14, 14 and the large core 13 connect the holes 4, 4 and the grooves 5, 5 to the container body 1 and the lid body 2.
When the container body 1 and the lid 2 are injected from the resin paths 11 and 12 into the cavities 8 and 9 to form the container body 1 and the lid 2, the two cavities are in contact with each other in the forward position. 8 and 9 are closed.

After molding the container body 1 and the lid 2 by injecting molten resin, when the small cores 14, 14 and the large core 13 are moved back, the hole is formed on the side adjacent to the container body 1 and the lid 2. 4, 4 are formed, and the groove portions 5, 5 extending over both the hole portions 4, 4 and the connecting gap 15 are formed in the adjacent portion.
It happens.

Therefore, when molten resin is injected from the resin path 16 in the large core, the connecting portion 3a fitted into the hole 4 is filled with the resin filled in both the holes 4, 4, the grooves 5, 5, and the connecting gap 15. and the strip portion 3 fitted into the groove portion 5
The hinge member 3 consisting of b is formed, and a box-shaped container is produced in which the container body 1 and the lid 2 are connected by the hinge member 3.

As mentioned above, this idea consists of a container body 1 and a lid body 2.
Holes 4, 4 with the locking edge 3c formed on the inner circumferential side are provided at the same position on the side adjacent to the locking edge, and a required depth is provided between the hole opening on the lower side of the locking edge and the side edge. groove part 5,
A hinge member 3 made of injection molded synthetic resin with good hinge properties is provided across both grooves 5, 5 and the holes 4, 4, and the hinge member 3 connects the container body 1 and the lid 2. Since the container body and lid are connected to each other, there is no need to consider the hinge characteristics of the synthetic resin that forms the container body and the lid, and the container can be formed using a synthetic resin that is suitable for the intended use of the container.

In addition, since the hinge member can be formed and locked when forming the container, the work of installing the hinge can be omitted.
Manufacturing costs can be reduced accordingly.

Furthermore, since the hinge member fits into both the hole and the groove, it can be installed on the same surface as the container body and lid, and the hinge does not pop out every time it is opened or closed, so it looks good. It has features such as being able to withstand long-term use.

[Brief explanation of the drawing]

The drawings show an embodiment of a synthetic resin container integrally equipped with a hinge according to this invention.
The figure is a vertical cross-sectional view of the main part, and FIG. 4 is a schematic vertical cross-sectional view of the container mold. DESCRIPTION OF SYMBOLS 1... Container main body, 2... Lid body, 3... Hinge member, 3a... Connecting part, 3b... Band-shaped part, 3c...
Locking edge, 4...hole, 5...groove.

Claims (1)

[Scope of utility model registration request] A hole with a locking edge protruding toward the inner periphery is provided at the same position on the adjacent side of the separate container body and lid made of synthetic resin, and a hole opening on the lower side of the locking edge and the side A groove of a required depth is formed between the edge and the hole, and a hinge member made of injection molded synthetic resin with good hinge properties is provided between both grooves and the hole, and the hinge member connects the container body and the lid. A synthetic resin container having integrally connected hinges.