JP3155696U - Double hinged plastic container with lid - Google Patents

Abstract

To provide a structure of a hinge part of a container with a resin lid, which is a container with a resin lid and can be easily opened and closed without applying too much pressure to the hinge part when opening and closing and bending. A resin container in which a container main body, a lid portion, and a hinge portion for connecting them are integrally formed, the hinge portion including a thin main hinge portion serving as a fulcrum for the container main body and the lid portion. , And a pair of side band hinge portions 3-1 and 3-2 having a uniform thickness on both sides. [Selection] Figure 1

Description

The present invention relates to a resin-covered container having a double hinge structure in which foods and the like are stored and a lid part, a main body container, and a hinge part connecting the main body container are integrally formed.

As a form of a resin container such as plastic, there is one in which a main body container and a lid are combined and integrated. Examples of the container with a lid in which the main body container and the lid are integrally formed through a hinge include a vacuum molded product using polyvinyl chloride, a container using a foam sheet, and an injection molded product using polypropylene. It is often used for the purpose of disposable or temporary contents storage. Many of these containers with lids are broken or broken by repeatedly opening / closing and bending the lid of the container via the hinge part in order to make the hinge part thinner than other parts, and many of them have short lifetimes.

JP-A-7-40960

The problems of the present invention are as follows.
1) A container with a resin lid that has a structure in which the container body and the lid are integrally connected by a hinge part by injection molding, and it is used for a long time by not applying too much pressure to the hinge part when opening and closing The structure of the hinge part that can be made 2) The structure of the hinge part that can easily open and close the lid of the container with a resin lid.

In the container with a lid made of resin according to the present discussion, a synthetic resin raw material (polypropylene) is used, and the container main body, the lid part, and the hinge part are integrally formed by an injection molding method or the like.
The container main body and the lid part are double hinges which are double-connected with a thin main hinge part as a fulcrum and a pair of side band hinge parts (the main hinge part and the pair of side band hinge parts are referred to as hinge parts of the present invention). It is a container with a resin lid having a structure.
The main hinge portion is formed of a polypropylene resin having a thin wall thickness (0.1 mm to 0.3 mm), and the position thereof is configured at the center of the branching point where the lid body is bent. The side band hinge portion has a concave and convex concave shape in which one inward convex curved portion and two outward concave curved portions are provided in front and rear thereof, and is formed of the same resin as the main hinge portion of a uniform thick plate. Although the thickness varies depending on the shape and application, this embodiment is formed with a thickness of 0.6 mm to 1.0 mm.

When the container lid is closed from a stationary state, bending pressure is applied to the hinge part in the process, but it extends to the inward convex curved part and the outward concave curved part of the pair of side band hinge parts provided as a double structure. Occurs and the load pressure is dispersed, making it difficult to break, and can handle a large number of opening and closing operations.
When the container lid is opened, the spring can be opened by simply pressing lightly due to the spring elastic action of the pair of side band hinges.

In the case of a lid-body-integrated container, the hinge part has a double structure consisting of a main hinge part and a pair of side band hinge parts, thereby extending the life of the container and even if the thin main hinge part breaks, It can be used continuously by the pair of side band hinge portions, and has an effect of improving economy. Further, due to the expansion and contraction of the hinge portion, it can be easily opened and closed with one hand, thus eliminating the complexity of container handling.

Configuration of the lid body-integrated container of the present invention (a) Perspective view of the lid body-integrated container in the opened state (b) Perspective view of the lid body-integrated container in the closed state Configuration of the hinge part of the lid body-integrated container of the present invention (a) Perspective view when the container is opened (b) Perspective view when the container is closed Longitudinal sectional view of hinge part of the present invention (a) When the container is opened (b) When the container is closed (c) When the container is fully pressurized (90 °)

The hinge structure which connects the container main body 1 and the cover part 2 of this invention is shown in FIGS. 1-3.
As shown in FIG. 1, the container body 1 and the lid 2 are composed of a thin main hinge 4, a pair of side band hinges 1 (3-1) and side band hinges 2 (3-2) provided on the left and right. Connected.
As shown in FIG. 2, the side band hinge 1 part (3-1) and the side band hinge 2 part (3-2) are arranged outwardly before and after one arcuate inwardly convex curved part (A). A concave and convex concave curved shape having a concave curved part 1 (B-1) and an outward concave curved part 1 (B-2) is formed of a uniform thick plate resin.
2 (a) and 3 (a), the thin main hinge portion 4 has a horizontal linear shape, and includes a side band hinge 1 portion (3-1) and a side band hinge 2 portion (3 -2) has two outward concave curves (B-1) and (B-2) and one convex curve portion (A), and connects the lid 2 and the container body 1 to each other. .

In the case of only the conventional main hinge part, the lid part 2 is rotated and bent after the horizontal locking (180 °) as shown in FIG. 2 (a) to the maximum pressurization (right angle 90 °) shown in FIG. 3 (c). When the lid portion 2 is closed, the center line of the thin main hinge portion 4 is bent at a right angle. Further, when the cover is closed as shown in FIG. 2 (b), when the pressure is applied, the hinges overlap in parallel, causing a circumferential extension at the central branch line and a negative state. (For example, in the case of transparent polypropylene, it turns white (blanches) by bending through the hinge portion). When the hinge part is configured by a single straight line having only a thin thickness, the locked state cannot be maintained due to the weight of the lid part when the body part and the lid part are opened substantially horizontally. Further, when the lid is closed, the thin-walled hinge extends against the load pressure and does not have an opening function.

In the case of the present invention, as shown in FIG. 3C, when the maximum pressure is applied, that is, when the main hinge portion 4 is bent at a right angle, the circumference of the convex curve of the side band hinge portions (3-1) and (3-2) The central part is located on the same right angle line as the main hinge part. And the circumferential length dimension of the uniform thick plate connected from the convex curved center part to the container main body and the lid part is formed by the length equally divided into the front (B-1) and the rear (B-2). As shown in FIG. 3 (C), the main hinge portion 4 serving as a fulcrum is bent by a circular motion simultaneously with the side band hinge portions (3-1) and (3-2), but has a uniform meat formed by an uneven concave and convex shape. Due to the rigidity of the side band hinge portion having the thick plate, the fulcrum and the power point are shared. In other words, the right angle (90 °) is a branch boundary, and the lid is closed to the main body locking side by its own weight and by the stretching force of the resin.
To the open side of the lid part, the lid is opened (rotated and pushed) by the restoring force of the curved shape formed on the uniform thick plate with concaves and convexes, and as shown in FIG. Can be maintained.
When the container lid part 2 closes to the main body side beyond the time of the maximum pressurization, the pair of side band hinge parts provided as a double hinge structure is stretched and dispersed, and no load is applied to the main hinge part. .
When the cover is closed, as shown in the enlarged views of FIGS. 2 (b) and 3 (b), two arcuate outwardly curved curved parts 1 (B-1) and an arcuate shape are formed outwardly. 1 part of outward concave curve (B-2) swells up and down, and expansion and contraction occurs. Further, the curved shape having a stagnation dimension of the inwardly convex curved portion (A) that is formed inwardly spreads outward, so that the extension is absorbed and no excessive force is generated.

The container main body 1 and the lid portion 2 close the lid portion 2 by engaging the fitting hole portion 5 of the lid of the lid portion 2 and the fitting convex portion 6 of the main body on the respective substantially horizontal sides.
When the container main body 1 and the lid portion 2 are closed, the lid portion 2 can be easily opened by the spring function of the hinge portion when the lower side of the main body fitting convex portion 6 is pushed.

  INDUSTRIAL APPLICABILITY The present invention can be widely used for a lid-integrated molded product such as a cap made of plastics such as various plastics molded by an injection molding method using a synthetic resin raw material, and a cap. .

10 Lid body integrated container
1 Container body
2 Lid
3 Side band hinge
3-1 Side band hinge 1 part
3-2 Side belt hinge 2 part
4 Main hinge part A Inwardly convex curved part
B Outward concave curved part B-1 Outward concave curved part 1 (Body connection side)
B-2 2nd concave curved outward (lid side)
5 Lid fitting hole
6 Main unit fitting protrusion

Claims (2)

A container made of a resin integrally molded with a container body 1 and a lid part 2 and a hinge part for connecting them,
The hinge part is composed of a thin main hinge part 4 and a pair of side band hinge parts (3-1) and (3-2) having a uniform thickness on both sides of the main hinge part 4. Double hinged plastic container with lid. The side-band hinges (3-1) and (3-2) include an outward concave curved part (B-1) and an outward concave curved part (B) before and after the arc-shaped inward convex curved part (A). -2), and is formed of a resin having a uniform thick plate, The container with a resin lid having a double hinge structure according to claim 1.

Images