JPH02249618A - Synthetic resin product with hinge - Google Patents

Abstract

PURPOSE:To manufacture a synthetic resin product with a hinge integrated with a synthetic resin film of superior flexibility by inserting a side edge section of the flexible synthetic resin film of superior flexibility having the melting point equivalent to or higher than that of two synthetic resin parts related each other and providing a hinge of the film between said two parts. CONSTITUTION:Both side edges of a synthetic resin film 3 having the melting point of equivalent to or higher than two synthetic resin parts 2 and 12 are inserted into their synthetic resin parts 2 and 12 related each other, and a hinge 4 constituted of the film 3 is provided between the resin parts 2 and 12. Thus, the resin film 3 inserted between the resin parts 2 and 12 is not fused with the resin parts 2 and 12 but is apparatus in the state of being bonded with the resin parts 2 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a hinged synthetic resin article provided with a hinge.

[Conventional technology]

Synthetic resin products with hinges have a thin-walled hinge integrated between the body and the lid that are related to each other, or a thin-walled hinge that is integrated between the male body and the female body that are related to each other, and the bending of the hinge. This is used to open and close the lid and to insert and remove the male and female bodies. Therefore, flexible synthetic resins such as nylon and polypropylene (hereinafter abbreviated as PP) are used as materials for synthetic resin articles with hinges.

In recent years, polybutylene terephthalate (which is less flexible than nylon or PP) has been used as a material for synthetic resin products with hinges.
(hereinafter abbreviated as PBT) has also come to be used.

(For example, Japanese Utility Model Application Publication No. 57-134248) [Problem to be solved by the invention] Synthetic resin products with hinges are made of flexible nylon or PP.
There was a big problem that it could only be molded using . In addition, synthetic resin products with hinges molded from PBT have poor flexibility, so if the hinges are frequently bent, there is a problem that the hinges will be damaged.

The present invention has been made in view of the problems of the prior art, and its purpose is to provide a hinge in which mutually related synthetic resin parts are integrated with a synthetic resin film having excellent flexibility. Our goal is to provide synthetic resin products with attached materials.

[Means to solve the problem]

In order to achieve the above object, the hinged synthetic resin article of the present invention has two interrelated synthetic resin parts with side edges of a flexible synthetic resin film having a melting point equal to or higher than that of both parts. This is an insert with a film hinge between the parts. It is preferable to provide a notch or a bent portion on the side edge of the film to be inserted into the synthetic resin component.

[For production]

Since the hinge is formed of a synthetic resin film inserted into a synthetic resin component, the hinge can be bent freely, and even if the hinge is bent, it will not peel off.

Furthermore, the synthetic resin parts can be formed from inexpensive synthetic resins or synthetic resins suitable for the purpose of the parts.

〔Example〕

Hereinafter, the structure of the synthetic resin product according to the present invention will be explained with reference to drawings of embodiments. The mutually related synthetic resin parts 2 and 12 are covered with a synthetic resin film 3 on both sides of which has a melting point equal to or higher than that of both parts 2 and 12. The edges are inserted and a hinge 4 made of a film 3 is provided between the resin parts 2 and 12.

For the synthetic resin parts 2 and 12, a synthetic resin suitable for the purpose of the resin parts 2 and 12, such as PBT or acrylonitrile butadiene styrene (hereinafter abbreviated as ABS), can also be used. In addition, the synthetic resin parts 2 and 12 include, for example, a container body that needs to be fitted and removed, a lid that fits into it, a male body and a female body of a case that needs to be opened and closed, a pin inner body of a connector and prevention of detachment of the inner pin. Pieces etc. are preferred.

The synthetic resin film 3 is made of nylon, PP, polyethylene terephthalate (hereinafter abbreviated as PET), etc., which has at least flexibility and has a melting point equal to or higher than the melting point of the synthetic resin parts 2 and 12. The resin film 3 inserted into the resin parts 2, 12 is not fused to the resin parts 2, 12, but rather adheres to the resin parts 2, 12.

In order to prevent the film 3 whose side edges are inserted into the synthetic resin parts 2 and 12 from peeling off or coming off from both the resin parts 2 and 12, cutouts 5 are provided at appropriate intervals on the side edges of the film 3, or cutouts 5 are formed at appropriate intervals in the side edges of the film 3. It is preferable to provide the bent portion 6 on the side edge, or to provide the bent portion 6 on the side edge of the film 3, and to provide the notch 5 in the bent portion 6 as appropriate.

The notch 5 and the bent portion 6 are provided at the side edges excluding the central portion that will become the hinge 4, that is, within the insert width g, and the notch 5 opens toward both ends as shown in Figure 4 (b). A groove-shaped notch 5a opens toward both ends as shown in FIG. 4(c),
The wedge-shaped notch 5b is wider than the population, and the round hole notches 5C are provided symmetrically or in a staggered manner as shown in FIG. 4(d).

The bent portion 6 is a plate-shaped bent portion 6a in which both side edges of the film 3 are simply bent in the same direction as shown in FIG.

As shown in Fig. 6, the stepped bent portion 8 has both side edges bent into an L-shape.
b, a folded bent part 6d where both side edges are folded back as shown in Fig. 7;
As shown in FIG. 8, a wavy bent portion 6c is provided with both side edges bent in a zigzag manner.

Specifically, cavities 8 and 18 for synthetic resin parts 2 and 12 are provided in a set of molds 7, and both cavities 8 and 18 are
A hinge cavity 9 is provided between the hinge cavity 9 and the hinge cavity 9.
Insert the film 3 into one side of the film 3 so that the side edges of the film 3 bite into both component cavities 8 and 18, fill the component cavities 8 and 18 with synthetic resin, and insert the resin component 2 into one of the film 3. A synthetic resin field 1 with a resin part 12 provided on the other side is formed. The insert position of the film 3 with respect to the synthetic resin parts 2 and 12 is determined by the insert width ρ in the case of a planar film 3 or a film 3 provided with a plate-like bent portion 6a.
part is embedded in the resin parts 2, 12, and a stepped bent part 6b, a wavy bent part 6C1, or a folded bent part 6 is formed on the side edge.
Film 3 provided with d, circular hole notch 5c in plate-shaped bent portion 6a
In the film 3 provided with this, it is possible to insert the resin part 2.12 and the hinge 4 so that they are flush with each other.

〔Effect of the invention〕

Since the hinged synthetic resin field of the present invention is constructed as described above, it produces the effects described below.

For the synthetic resin parts, inexpensive synthetic resins or synthetic resins suitable for the purpose of the parts, such as PBT and ABS, can be used. Moreover, the hinge is not affected by the material of the resin parts, and can be made from flexible synthetic resin films such as nylon or PP.
Alternatively, since the hinge can be formed of PET or the like, it will not be damaged even if the hinge is bent frequently. Moreover, since the hinge is inserted into the synthetic resin part and is integrated with the resin part, it will not peel off or come off during use.

As a result, the hinged synthetic resin field can be formed from a wide variety of synthetic resins.

[Brief explanation of drawings]

Figures 1 to 3 are cutaway front views of essential parts of the hinged synthetic resin field of the present invention showing examples of film inserts, and Figures 4 (a), (b), (c), and (d) are perspective views of planar films. , Figures 5 (a), (b), (c), and (d) are perspective views of the plate-shaped bent film, Figures 6 (a) and (b) are perspective views of the step-shaped bent film, and Figure 7 (i) is a perspective view of the plate-shaped bent film. )(b) is a perspective view of the wavy bent portion film;
Figures 8(a) and 8(b) are perspective views of the folded and bent portion film;
Figures 9 (a) and (b) are enlarged cross-sectional views of essential parts showing examples of film inserts, Figure 1θ is a cross-sectional view of the mold, and Figures 11 (a) and (b) are cross-sections of similar hinged synthetic resin circles. It is a diagram. 1...Synthetic resin world, 2,12...Synthetic resin parts, 3
...Resin film, 4...Hinge, 5+ 5a, 5
b, 5c...notch, 6.6a, 6b, 6c, 6d...
・Bending part, g...Film insert width (A) (B) C:) (A) (A) (B) Figure Figure Figure (B) Figure 9 (A) Figure 9 (B) Figure 5.5a, 5A, 5C = Notches 6.5a, 5b, 6c, LyLi Bend section procedural correction ten mouths (spontaneous) Display of the case 1999 Patent Application No. 72696 2 Title of the invention Synthetic resin product with hinges Person making amendments Relationship to the case Patent applicant Address 1, 1029 Nakashin, Nayo City, Toyama Prefecture Name Representative of Toyama Parts Co., Ltd. Mitsuo Inazawa 4 Agent address: 2-g-9H', Sengoku-cho, Toyama City, Toyama Prefecture, 'Name (3694) Patent Attorney Miya 1) Tomonobu 2, Claims 1, Interrelated synthetic resin parts ( Insert into 2) and (12) side edges of a synthetic resin film (3) which has a melting point equal to or higher than that of both resin parts and is at least flexible;
A hinged synthetic resin article 2 characterized in that a bendable hinge (4) made of a film is provided between the synthetic resin parts, cutouts (5) are appropriately provided on both side edges of the film (3), and the synthetic resin The hinged synthetic resin article 3 according to claim 1, which improves the integration of the component (2) (1, 2) and the film inserted therein, wherein bent portions (6) are provided on both side edges of the film (3). ,
The object of correction of the hinged synthetic resin product according to claim 1, which improves the integration of the synthetic resin part (2') (12) and the film inserted therein.

Claims (1)

[Claims] 1. Into the mutually related synthetic resin parts (2) and (12), insert side edges of a synthetic resin film (3) which has a melting point equal to or higher than that of both resin parts and is at least flexible. death,
A synthetic resin product with a hinge, characterized in that a flexible hinge (4) made of a film is provided between synthetic resin parts. 2. The hinged synthetic resin according to claim 1, wherein notches (5) are appropriately provided on both side edges of the film (4) to improve integration of the synthetic resin parts (2) and (12) and the film inserted therein. Goods. 3. Providing bent portions (6) on both side edges of the film (4),
The hinged synthetic resin product according to claim 1, wherein the synthetic resin parts (2) and (12) and the film inserted therein are better integrated.