JP2003231541A - Plastic molded container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic molded container in which at least one of a plastic container body and a lid is formed of a blow-molded body, and no problems occur in locking the lid by both locking projections even if there is slight variance in the relative position of the locking projections when the locking projections are integrally formed on the container body and the lid. <P>SOLUTION: This plastic molded container comprises the container body 1 and the lid 2 connected to a back side of an opening part 3 therein via a flexible sheet-like plastic hinge 4. A body side locking projection 5 is integrally formed on one side (the right side) of the opening part 3, and a lid side locking projection 6 to be engaged with the body side locking projection 5 is integrally formed on the inner side of the lid 2. When the lid 2 is depressed, the lid 2 is lowered while deviating its position due to the flexibility of the plastic hinge 4, the lid side locking projection 6 rides over the body side locking projection 5 at the same time, and both locking projections are engaged with each other to lock the lid 2 to the opening part 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container body, which is a plastic molded product and at least one of which is a blow molded product, and a lid, which are connected via a flexible thin plate plastic hinge. The present invention relates to a plastic molded container, and more particularly to a locking structure for a container body and a lid.

[0002]

2. Description of the Related Art In a container (for example, a compost) in which a container body made of a plastic molded body and a lid are connected by a hinge, and the lid can be freely opened and closed with respect to the opening of the container body, the lid is used. There is a case where the lid is locked to the container body with a simple structure when the container is closed. As the structure of the locking part at that time, one locking part is provided on the front side of the opening (the side opposite to the hinge) and the locking part corresponding to the locking part is also provided on the lid. Means are provided such that a pair of locking portions are provided at symmetrical positions on the left and right sides of the section, and a pair of left and right locking portions corresponding thereto is also provided on the lid.

The locking portion is, for example, a locking projection formed on the container body and the lid, and they are engaged with each other to lock the lid on the opening of the container body. Both locking protrusions overlap each other in a plan view (projected vertically to the lid with the lid closed) .When closing the lid and engaging both locking protrusions, pressing force is applied from the lid side. In addition, it is necessary to allow the lid-side locking projection to get over the container body-side locking projection. the above,
In either case, the plastic container body or the lid itself is elastically deformed to overcome the problem. If the container body and the lid are sufficiently flexible, even if the overlapping of the locking projections is somewhat large, the container body or the lid itself is easily elastically deformed by applying a pressing force, and the lid-side locking projection is Both locking projections are engaged by overcoming the body side locking projection. Even if the container body and the lid are not sufficiently flexible, if the overlapping of the locking projections is made small, the lid side locking projections will be elastically deformed when pressure is applied to the container body or the lid itself. Rides over the main body side locking projection and both locking projections engage.

[0004]

By the way, one or both of such a container body and lid may be manufactured by blow molding of plastic, and in that case, the engaging projections are respectively blow molded on the container body or lid at the time of blow molding. It is integrally formed. However, blow molded products generally do not have sufficient dimensional accuracy, so when the container body and lid are not sufficiently flexible, the overlap between the two locking projections is set to a small value by designing the lid-side locking projections. Even if the pedestal crosses over the main body side locking projection, some of the locking projections may overlap too much and the lid cannot be closed. What cannot be manufactured is manufactured. This is a particular problem when both the container body and the lid are made of plastic blow molding. Also, regarding the alignment of the container body and the lid, precise work is required in order to properly set the overlap of both locking protrusions. In short, the allowable range of the overlapping distance between the two locking projections is very narrow. The present invention has been made in view of the above problems, and in the case where at least one of the container body and the lid is formed by a blow molded body, and the locking protrusions are integrally formed on the container body and the lid, respectively, An object of the present invention is to make it possible to easily obtain a plastic molded container that does not cause a problem in locking the lid by both locking projections even if the dimensions vary to some extent.

[0005]

A plastic molded container according to the present invention comprises a container body and a lid connected to the back side of an opening of the container body through a flexible thin plastic hinge. The container body and the lid are both plastic molded bodies, and at least one is a blow molded body, and the main body side locking projection is integrally formed only on one of the left and right sides of the opening, and the inside of the lid is formed. A lid-side locking projection that engages with the main-body-side locking projection is integrally formed, and both locking projections engage with each other when the lid is closed to lock the lid in the opening. Alternatively, a lid-side locking projection is integrally formed on only one of the left and right sides of the inside of the lid, and a main-body-side locking projection that engages with the lid-side locking projection is integrally formed in the opening. When the lid is closed, both locking projections are engaged with each other to lock the lid in the opening. Incidentally, in the present invention, the back side is the side where the plastic hinge is located, and the left and right are placed so that the plastic hinge is behind this plastic molded container,
This means the left and right sides when viewed from the front. It is preferable that the plastic hinge is integrally formed with either or both of the container body and the lid.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a plastic molded container according to the present invention will be described below with reference to FIGS. This plastic molded container, as shown in FIGS.
Both are composed of a container body 1 and a lid 2 obtained by plastic blow molding, and the lid 2 is connected to the back side of the rectangular opening 3 of the container body 1 via a flexible thin plate plastic hinge 4. ing. The lid 2 is a double-walled hollow body, and has a recess 2a that covers the side wall of the opening 3 of the container body 1 with a certain gap when closed. The plastic hinge 4 is integrally formed with the lid 2 during blow molding by a known method, for example, and is thinner than the plate thickness of the lid 2 (and the container body 1) in order to have flexibility. It is connected at multiple points with nuts. On the right side surface of the opening 3 of the container body 1, a locking projection 5 is formed integrally with the upper and lower surfaces in a triangular shape when viewed from the front, and the locking projection of the recess 2a of the lid 2 is integrally formed outward. At a position corresponding to 5, a locking projection 6 which is also triangular in a front view and whose upper and lower surfaces are inclined is integrally formed inward. The locking protrusions 5 and 6 of the container body 1 and the lid 2 are separated by a predetermined distance in plan view (see FIG.
They are connected so that they overlap (shown by s in (b)).

When the lid 2 of the plastic molded container is closed from the open state, when the lid 2 is pushed down, the lower surface of the locking projection 6 comes into contact with the upper surface of the locking projection 5 and tries to shift the lid 2 to the right. Power is generated. This force is plastic hinge 4
Since the plastic hinge 4 has a thin plate-like shape and is flexible, it is actually twisted by the force and the lid 2
Moves down and shifts to the right. During this time, as shown in FIG. 4A, the lower surface of the locking projection 6 slides along the upper surface of the locking projection 5. When the lid 2 is pushed down further, the locking protrusion 6
Rides over the locking projection 5 and comes to a position below the locking projection 5. At the same time, as shown in FIG. 4 (b), the lid 2 returns to the left side by the elastic force of the plastic hinge 4 and the deviation is recovered, and the two locking projections 5 and 6 are engaged with each other so that the lid 2 is moved to the opening 3. Lock. The moving path of the locking projection 6 is indicated by an arrow t.

In this plastic molded container, since the thin and flexible plastic hinge 4 is used to connect the container body 1 and the lid 2, the locking projection 6 and the locking projection 5 are used.
Even if the overlapping of the two is somewhat large, the locking projection 6 easily gets over the locking projection 5. Therefore, the overlapping distance s of both locking protrusions
By setting a large value, even if there is some manufacturing variation in blow molding, the overlapping of both locking protrusions is almost eliminated and the lid 2 cannot be locked. Conversely, the actual overlapping does not occur. It does not mean that the lid cannot be closed even if it becomes larger than the setting. That is, it can be said that the allowable range of the overlapping distance s of both locking protrusions is large. Therefore, the upper and lower position alignment work of the container body 1 and the lid 2 becomes very easy.

In the above plastic molded container, both locking protrusions are formed only on the right side of the opening, but if they are formed only on the left side, the same effect can be obtained. Further, although the shape of the opening and the lid of the container body is rectangular, it can be applied to other shapes. Further, although the plastic hinge is integrally formed with the lid, it may be integrally formed with the container body, or the container body, the lid and the plastic hinge may be integrally formed. Alternatively, these three products may be separately molded and assembled.

[0010]

According to the present invention, the container body and the lid are both plastic molded bodies, at least one of which is a blow molded body, and the container body and the lid are integrally formed with locking projections. In the molded container, it is possible to easily obtain a plastic molded container in which the locking of the lid by both locking projections does not cause a problem even if the dimensions vary to some extent. The present invention is particularly effective when both the container body and the lid are made of a plastic blow-molded product because the dimensional variation easily occurs.

[Brief description of drawings]

FIG. 1 is a front left perspective view of a plastic molded container according to the present invention.

FIG. 2 is a front right perspective view thereof.

FIG. 3 is a rear side perspective view thereof.

FIG. 4 is a diagram illustrating engagement of locking protrusions.

[Explanation of symbols]

1 container body 2 lid 3 openings 4 plastic hinges 5 Locking protrusion at the opening 6 Lid locking protrusion

Continued front page    (72) Inventor Fumiya Asano             Minoru 447 Shimo-shi, Sanyo-cho, Akaban-gun, Okayama Prefecture             Sangyo Co., Ltd. F-term (reference) 3E033 AA03 BA13 DA01 FA03 GA03                 3E084 AA05 AA14 AA24 BA01 CA03                       CC03 DA03 DB13 DC03 FA02                       FC04 GA06 GB06 LA18 LB02                       LB09 LD01

Claims (3)

[Claims] 1. A container main body and a lid connected to the back side of the opening of the container via a flexible thin plate plastic hinge, both the container main body and the lid being a plastic molded body and at least One is a blow molded body, and the main body side locking projection is integrally formed on only one of the left and right sides of the opening, and the lid side engagement engaged with the main body side locking projection inside the lid. A plastic molded container characterized in that a stop projection is integrally formed, and when the lid is closed, both locking projections engage with each other to lock the lid in the opening. 2. A container main body and a lid connected to the rear surface side of the opening of the container via a flexible thin plate plastic hinge, both the container main body and the lid being a plastic molded body and at least One is a blow-molded body, and a lid-side locking projection is integrally formed on only one of the left and right sides of the inside of the lid, and the main body-side engagement that engages with the lid-side locking projection in the opening. The stop projection is integrally formed,
A plastic molded container characterized in that when the lid is closed, both locking projections are engaged to lock the lid in the opening. 3. The plastic molded container according to claim 1, wherein the plastic hinge is integrally molded with either one or both of the container body and the lid.