JPH0430108Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a blind lid that is embedded in various containers to close the mouths of the containers.

[Conventional technology]

Traditionally, it has been used as a closure device for container mouths since 1973.
The one described in Publication No. -53488 is known.
This closure device closes the mouth of the container body by screwing the cap into the mouth and neck of the container body, and has an engaging part on the container body side and the cap side that engages with each other, and furthermore, the cap loosens on its own. It is equipped with an elastic connecting piece that acts as a holding bar to prevent this.

However, this closure device has the following problems. In other words, regarding the structure of the cap, a cylindrical portion and an outer wall are arranged in the radial direction, a locking member is interposed between the cylindrical portion and the outer wall, and the locking member also connects the inner ring and the outer ring in the radial direction. Since the elastic connecting piece is interposed between the inner ring and the outer ring, many components are arranged in a stacked manner in the radial direction from the cylindrical portion to the outer wall. Therefore, the diameter of the cap becomes extremely large compared to the diameter of the mouth of the container body, and a large space is required to install the cap on the outer peripheral side of the mouth and neck. This also poses a problem in the case of a blind lid that is attached to a container in a buried state as in the present invention, in other words, a large annular recess must be formed around the opening of the container mouth in order to attach the blind lid. First, depending on the size and shape of the container, it may not be possible to form such a large annular recess, and a blind lid may not be attached.

[Problem to be solved by the invention] In view of the above points, the present invention provides a blind lid which is equipped with a component that acts as a gripping bar in addition to a pair of engaging parts (engaging teeth) as in the above-mentioned prior art. In the present invention, it is an object of the present invention to provide the blind lid with a compact structure in the radial direction.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a blind lid that is embedded in a container and has a female thread formed around the opening of the mouth and an annular opposing seat surface formed inside the female thread. , a lid body which is approximately disc-shaped and has a male thread formed on its outer diameter surface to be screwed into the female thread; A stopper ring facing the facing seating surface, a stopper ring disposed between the lid body and the stopper ring, a plurality of which are arranged along the circumferential direction of the stopper ring, and the lid body and the stopper ring are integrated. a connecting branch connected to the stopper ring, inclined in the direction of loosening the screw from the lid body to the stopper ring, and having flexibility, the end face of the stopper ring on one axial end side and the To provide a blind lid in which engaging teeth that mesh with each other are formed on an opposing seating surface.

[Effect]

A stopper ring is arranged at one end in the axial direction of the lid body, a connecting branch is arranged between the lid body and the stopper ring, and the lid body, the connecting branch, and the stopper ring are arranged in the axial direction to form a radial structure. Single layer.

When the blind lid is screwed into the mouth of the container, when the blind lid is screwed in to a certain extent, the end surface of the stopper ring on one axial end side comes into contact with the opposing seating surface, and the engaging teeth formed on both surfaces mesh with each other. . As screwing continues, the distance between the lid body and the stopper ring narrows, the connecting branch is elastically deformed, an elastic restoring force is generated in the connecting branch, and the meshing of the engaging teeth is strengthened by the elastic restoring force. The connecting branch runs from the lid body to the stopper ring and is inclined in the direction of loosening the screw, so that it easily deforms when the blind lid is rotated in the direction of tightening the screw. It is designed so that it does not easily deform when rotated. Therefore, when the blind lid tries to rotate in the direction of loosening the screw, the connecting branch acts as a holding bar to prevent the rotation.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. The blind lid has a female thread 10 formed at the opening periphery of the mouth portion 9, and an annular opposing ring formed inside the female thread 10 (on the upper and lower sides of the figure). It is installed in a buried state in a container 8 in which a seat surface 11 is formed.

Reference numeral 1 denotes a lid body that is approximately disk-shaped and has a male screw 2 formed on its outer diameter surface to be screwed into the female screw 10, and one end side in the axial direction of the lid body 1 (upper and lower sides in the figure, the same applies hereinafter). A stopper ring 3 is arranged concentrically so that the lower end surface 4 faces the opposing seating surface 11. The lid body 1 and the stopper ring 3 are integrally connected by a plurality of connecting branches 5. A plurality of connecting branches 5 (four in the figure, preferably 2 to 8) are arranged at equal intervals along the circumferential direction of the stopper ring 3, and each connecting branch 5 extends from the lid 1 to the stopper ring 3. It is inclined in the direction toward which the screws 2 and 10 are loosened, and is flexible. The lower end surface 4 of the stopper ring 3 and the opposing seat surface 11 have engaging teeth 6, 1 that mesh with each other.
2 are formed over the entire circumference.

The lid 1, the connecting branch 5, and the stopper ring 3 are integrally injection molded from a thermoplastic resin such as polyamide, polyacetal, polycarbonate, or polypropylene, and are partially machined if necessary. The container 8 is molded from a resin such as polyamide, polyacetal, or phenol, and is partially machined if necessary.

The engaging teeth 6, 12 may be of any type as long as they can prevent the stopper ring 3 from rotating relative to the container 8 by meshing with each other, and their shape may be approximately triangular or wavy in cross section. Furthermore, the engaging teeth 12 on the container 8 side may be formed into a resin or metal annular body separate from the container 8 body, and the annular body may be attached to the opposing seating surface 11 later. .

The blind lid is constructed by engaging a rotating jig (not shown) with a jig engaging portion 7 recessed in the end face of the other end in the axial direction (upper side in the figure) of the lid body 1, and rotating the jig. It is screwed into the opening 9 of the container 8. When the blind lid is screwed into the mouth 9 of the container 8, the lower end surface 4 of the stopper ring 3 is attached to the opposing seat surface 1 when screwed in to a certain extent.
1, the engaging teeth 6 and 12 mesh with each other, and if screwing continues as it is, the distance between the lid body 1 and the stopper ring 3 will narrow, and the connecting branch 5 will be elastically deformed. An elastic return force is generated, and the engagement between the engagement teeth 6 and 12 is strengthened by the elastic return force. The connecting branch 5 runs from the lid body 1 to the stopper ring 3 with a screw 2,
Since the blind cover is inclined in the direction of loosening the screws 2 and 10, it is easily deformed when the blind cover is rotated in the direction of tightening the screws 2 and 10.
When the blind cover is rotated in the direction of loosening the screws 2 and 10, it is not easily deformed. Therefore, when the blind cover tries to rotate in the direction of loosening the screws 2, 10, the connecting branch 5 acts as a holding bar to prevent the rotation. This prevents the blind lid from slipping out from the mouth portion 9.

Therefore, the blind lid has a stopper ring 3 disposed at one end of the lid 1 in the axial direction, and the lid 1 and the stopper ring 3
Since the connecting branch 5 is arranged between the lid body 1, the connecting branch 5, and the stopper ring 3 in the axial direction to form a single layer structure in the radial direction, the diameter of the blind lid is equal to the diameter of the opening of the container 8. It does not become extremely large compared to the diameter dimension of No. 9, and it is possible to obtain a radially compact structure compared to the above-mentioned conventional technology.

[Effect of idea]

The present invention has the following effects. That is, in a blind lid that is equipped with a pair of engaging parts (engaging teeth) and a component (connecting branch) that acts as a gripping rod, a stopper ring is arranged at one end in the axial direction of the lid body, and the lid body Since the lid body, the connecting branch and the stopper ring are arranged in the axial direction to form a single layer structure in the radial direction, the diameter of the blind lid is the same as the diameter of the mouth of the container. It does not become extremely large compared to the dimensions, and a radially compact structure can be obtained compared to the above-mentioned conventional technology. Therefore, even in cases where it would not be possible to attach the blind lid using the conventional technique described above, the blind lid can be attached to close the mouth.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a blind lid according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line AA in FIG. 1. DESCRIPTION OF SYMBOLS 1...Lid body, 2...Male thread, 3...Stopper ring, 4...One end surface in the axial direction, 5...Connection branch, 6, 1
2... Engaging teeth, 7... Jig engaging portion, 8... Container,
9... Mouth part, 10... Female screw, 11... Opposing seat surface.

Claims (1)

[Scope of utility model registration request] A blind lid that is embedded in a container 8 and has a female thread 10 formed on the opening periphery of the mouth part 9 and an annular facing seat surface 11 formed inside the female thread 10,
A lid body 1 having a substantially disc shape and having a male screw 2 formed on its outer diameter surface to be screwed into the female screw 10, and a lid body 1 arranged concentrically on one axial end side of the lid body 1, A stopper ring 3 having an end surface 4 facing the facing seat surface 11 is disposed between the lid body 1 and the stopper ring 3, and a plurality of stopper rings are arranged along the circumferential direction of the stopper ring 3, A connecting branch 5 integrally connects the lid 1 and the stopper ring 3, extends from the lid 1 to the stopper ring 3, is inclined in a direction to loosen the screws 2, 10, and is flexible. , and engages with the end surface 4 of the stopper ring 3 on one axial end side and the opposing seating surface 11,
The blind lid formed 12.