JPH0453430Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to hinges, and particularly to improvements in plastic hinges.

<Prior art> Conventionally, this type of hinge has been constructed by inserting a core rod into each of the cylindrical holes for inserting a core rod in a pair of plastic hinge pieces, connecting the hinge pieces to each other, and then connecting the hinge pieces to each other. It is known that a solvent such as methylene chloride is applied to the back surface of each flat plate part, and the solvent is welded to a plastic case or other part for use (Utility Model Opening in 1973).
(See Publication No. 11166).

<Problems to be solved by the invention> By the way, in order to weld each of the connected hinge pieces to a cupboard, etc., a solvent is applied to the back side of each hinge piece and immediately pressed onto the board surface of the cupboard, etc. by hand. At this time, with conventional hinges, not only can too much solvent be applied, but even if the amount is approximately the right amount, it can be applied to the wrong place on the back of the hinge piece. may enter the contact area between the cylindrical parts of the hinge pieces that are connected,
Alternatively, there is a problem in that the hinge gets into the sliding contact surface between the cylindrical part and the core rod inside the cylindrical part, impeding the smooth rotational movement of the hinge.

The present invention was made to solve these conventional problems, and it is a plastic hinge that does not allow solvent to enter the contact area between the cylindrical parts of the hinge pieces or the sliding contact area between the cylindrical part and the core rod. This is what we are trying to provide.

<Means for Solving the Problem> Therefore, the present invention provides a continuous connection between the back surface of the flat plate part of each hinge piece and the outer peripheral surface of the cylindrical part from one end to the other end along the axial direction of the cylindrical part. A step is provided to prevent the adhesive from flowing.

<Function> As a result, the stepped portion can prevent the solvent applied to the back surface of the flat plate part of each hinge piece from going around to the unwelded part of the cylindrical part of the hinge piece, which in turn prevents the connected hinge pieces. can be prevented from flowing into the contact surfaces between the cylindrical parts and the sliding contact surfaces between the cylindrical parts and the core rod.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

The plastic hinge 1 consists of a pair of plastic hinge pieces 2, 2, and a core rod 3 made of, for example, iron.

As shown in Fig. 1, each of the pair of hinge pieces 2, 2 (the hinge pieces are symmetrical with each other, so only one will be explained) has its back side stuck to the plate surface of a cupboard or the like as a part to be used. a flat plate portion 5,
The flat plate part 5 includes a cylindrical part 4 which is integrally formed so as to protrude toward the surface side of one end thereof, and through which the core rod 3 can pass each of the pair of hinge pieces 2, 2 coaxially.

Here, the hinge piece 2 is attached from one end to the back side of the connecting part between the cylindrical part 4 and the flat plate part 5, that is, the back side part of the outer circumferential surface of the cylindrical part 4 which is approximately at the same height as the back surface of the flat plate part 5. A series of stepped portions 6 for preventing the flow of adhesive along the axial direction of the cylindrical portion 4 until the other end.
is formed.

The hinge 1 having such a structure includes, for example, a hinge piece 2 connected to a predetermined part of a plastic case.
2. As mentioned above, by applying a solvent to the back side of each and immediately adhering it, the adhesive can be firmly bonded.

At this time, if too much solvent is applied,
Alternatively, if the solvent is applied only toward the cylindrical portion 4 on the back side of the hinge piece 2, or if the applied solvent is concentrated particularly toward the cylindrical portion 4,
All of the excess solvent remains in the space formed by the stepped portion 6, so this excess solvent is absorbed into the abutting portion between the cylindrical portions 4, 4 of the hinge pieces 2, 2 connected to each other, or between the cylindrical portion 4 and the cylindrical portion 4. It does not get into the sliding contact area with the core rod 3. Therefore, smooth rotational movement of the hinge pieces 2, 2 via the core rod 3 can be ensured.

In this embodiment, the stepped portion 6 is provided, but the present invention is not limited to this. For example, as shown in FIG. It is clear that substantially the same effect can be obtained.

Further, the hinge of any of the above embodiments is extremely advantageous in that the manufacturing process is not particularly complicated compared to the conventional example, and there is no inconvenience such as increase in cost.

<Effects of the invention> As explained above, according to the invention, a step part for preventing the flow of adhesive is formed at the joint between the back surface of the flat plate part of the hinge piece and the outer circumferential surface of the cylindrical part, so that the step part for preventing the flow of adhesive is formed when the hinge piece is attached. The structure is such that the solvent applied to the flat plate portion stays at the stepped portion and does not flow into the contact portion between the cylindrical portions or the sliding contact portion between the cylindrical portion and the core rod, thereby preventing the rotational movement of the hinge. can be performed smoothly, and smooth operability can be ensured.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a view corresponding to FIG. 2 showing another embodiment. 1... Hinge, 2... Hinge piece, 3... Core rod,
4... Cylindrical part, 5... Flat plate part, 6... Step part, 7...
...Mizobe.

Claims (1)

[Scope of utility model registration request] A pair of hinge pieces each having a cylindrical part and a flat plate part, and a core rod coaxially inserted into the cylindrical parts of these hinge pieces, and the back side of the flat plate part of each hinge piece is attached to the used part with adhesive. In a plastic hinge that is used by bonding, a flow stopper is applied to the joint between the back surface of the flat plate part of the hinge piece and the outer peripheral surface of the cylindrical part in a series from one end to the other along the axial direction of the cylindrical part. A plastic hinge characterized by having a stepped section for use.