JPH08326921A - Elastic ring for sealing opening part and connecting part of cylindrical body - Google Patents

Abstract

PURPOSE: To provide an elastic ring for sealing which can be simply mounted to an opening part and a connecting part of a cylindrical body used for a vessel, pipings, or the like. CONSTITUTION: This is an elastic ring 1 molded out of synthetic rubber so as to form a slender O-shaped ring as a whole, and it is constituted so as to be provided with the inner diameter D in the direction of major axis larger than an outer diameter of an outer circumferential part 7 of a cylindrical body 5 to be mounted thereon, the inner diameter (d) in the direction of minor axis smaller than the outer diameter of the outer circumferential part 7, and an inner circumferential part of inner circumference a little smaller than the outer circumference of the outer circumferential part 7. Hereby, two pieces of elastic rings can be injection-molded by one metallic mold, manufacturing efficiency of the elastic ring is improved, and a manufacturing cost becomes moderate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic ring for sealing an opening and a connecting portion of a cylindrical body mainly used for containers, piping, or other purposes.

[0002]

2. Description of the Related Art As shown in FIG. 7 (a), a conventional elastic ring 31 for sealing an opening and a connecting portion of a tubular body used for a container, a pipe, or other uses is a tubular body. It is formed in a perfect circular shape as a whole according to the cross-sectional shape. And
Synthetic rubber is usually used as the material of the elastic ring 31, and in this case, the elastic ring 31 is manufactured by using a mold Ks for injection molding shown in FIG. 7 (b).

Next, when the elastic ring 31 for sealing the opening of the tubular body is used for sealing the opening of the tubular body, the elastic ring 31 for sealing is attached to the outer peripheral portion of the tubular body. In addition, the opening of the tubular body is covered with a lid for sealing, and the sealing method uses a lid that covers the opening and the outer peripheral portion of the tubular body at the same time. The ring 31 and the opening are covered and hermetically sealed, and the watertightness and airtightness are improved through the elastic ring 31. In many cases, the inner circumference of the elastic ring 31 is formed to be slightly smaller than the outer circumference of the outer peripheral portion of the tubular body, and after the elastic ring 31 is attached to the outer peripheral portion of the tubular body, the elastic ring 31 becomes the tubular body. The outer periphery is supported by its elastic force by itself.

[0004]

As described above, the elastic ring 3 for sealing the opening of the cylindrical body made of synthetic rubber is used.
1 is manufactured by using a mold Ks for injection molding, but since the elastic ring 31 has the shape of a perfect circle, FIG.
As shown in (b), the cavity 3 that models the elastic ring 31.
Since 1 s occupies a large area in the shape of a perfect circle, the mold Ks
One cavity 31s, that is, the elastic ring 3
There is no choice but to take one, so the elastic ring 3
1 has a problem that the manufacturing efficiency is low and the manufacturing cost is high.

Next, when the elastic ring 31 for sealing the opening 36 of the tubular body 35 is mounted on the outer peripheral portion 37 of the tubular body 35,
There was also a problem that it was difficult to wear. That is, the procedure of mounting the elastic ring 31 will be described. As shown in FIG. 8A, first, one end 31a of the elastic ring 31 is hooked from one side to one end of the outer peripheral portion 37 of the tubular body 35. Next, as shown in FIG. 8 (b), when the other end 31b side of the elastic ring 31 is grasped and pulled in the outward direction (arrow), the ring of the elastic ring 31 extends in the pulling direction while The width of the ring becomes narrower in the right angle direction and becomes narrower inward of the outer peripheral portion 37 of the tubular body 35. In this state, the elastic ring 3
Even if one tries to attach the elastic ring 31 to the outer peripheral portion 37 of the tubular body 35 by pulling down the other end 31b of the 1 downward,
As shown in FIG. 8 (c), the elastic ring 31 has the outer peripheral portion 3
Since it slips off the edge of 7, the elastic ring 31 cannot be attached by such a simple attachment method, which is a work-related difficulty.

Further, in order to connect the plurality of tubular bodies 35 to each other, when the connecting portions (male connecting portion and female connecting portion) provided at the ends of the tubular body 35 are fitted and connected, the connecting portions are connected. There is also a problem when the sealing elastic ring 31 is attached to the connecting portion in order to enhance the airtightness and watertightness of the portion. That is, first, when the elastic ring 31 for sealing is mounted on the outer peripheral portion of the male connecting portion of the tubular body 35, the simple mounting is performed under exactly the same circumstances as in the case of the opening 36 of the tubular body 35. There is a work-related difficulty that it cannot be attached by the method. Next, when the sealing elastic ring 31 is attached to the female connecting portion of the tubular body 35, when the outer diameter of the sealing elastic ring 31 is larger than the inner diameter of the female connecting portion, the sealing elastic ring 31 is used. Is difficult to insert and mount into the female connecting portion, and conversely, when the outer diameter of the sealing elastic ring 31 is smaller than the inner diameter of the female connecting portion, it can be easily placed in the female connecting portion. However, since the sealing elastic ring 31 is simply placed without supporting inside the female connecting portion without being supported, when the tubular body 35 is placed horizontally, the sealing elastic ring 31 inside is predetermined. There was a problem of getting out of position.

[0007]

In order to solve the problems as described above, the elastic ring for sealing the opening and the connecting portion of the tubular body of the present invention forms an elongated O-shaped ring as a whole. As described above, it is molded from synthetic rubber. And, the elastic ring for sealing the opening of the tubular body of the present invention has an inner diameter in the major axis direction larger than the outer diameter of the outer peripheral portion of the tubular body to be mounted, and smaller than the outer diameter of the outer peripheral portion. It is configured to have an inner diameter in the minor axis direction and an inner circumferential portion having an inner circumference slightly smaller than the outer circumference of the outer circumferential portion.

Further, the elastic ring for sealing the male connecting portion of the tubular body of the present invention has an inner diameter in the major axis direction larger than the outer diameter of the outer peripheral portion of the male connecting portion of the tubular body to be mounted, and It is configured to have an inner diameter in the minor axis direction smaller than the outer diameter of the outer peripheral portion and an inner peripheral portion having an inner periphery slightly smaller than the outer periphery of the outer peripheral portion. Further, the elastic ring for sealing the female connecting portion of the tubular body of the present invention has an outer diameter in the major axis direction larger than the inner diameter of the inner peripheral portion of the female connecting portion of the tubular body to be mounted, and It has an outer diameter in the minor axis direction smaller than the inner diameter of the peripheral portion and an outer peripheral portion having an outer periphery slightly longer than the inner peripheral portion of the inner peripheral portion. This sealing elastic ring is manufactured by injection molding synthetic rubber such as silicone rubber, polyurethane rubber, or fluororubber.

[0009]

[Operation] In the elastic ring for sealing the opening portion and the connecting portion of the tubular body of the present invention configured as described above, it is formed as an elongated O-shaped ring as a whole and molded with synthetic rubber. Since the mold for injection-molding the elastic ring is a small O-shaped cavity that forms the elastic ring, a small area is required, and two molds can be taken with one mold, resulting in good manufacturing efficiency. The effect is that the manufacturing cost is low.

In addition, the sealing elastic ring used for the opening of the tubular body and the sealing elastic ring used for the male connecting portion of the tubular body enable a simple mounting method of the elastic ring, thus improving work efficiency. The effect is also obtained. Also, the sealing elastic ring used for the female connecting portion of the tubular body can be attached to the inner peripheral portion of the female connecting portion of the tubular body by an extremely simple attachment method, and the work efficiency is improved, and the elastic ring Is intimately inscribed by the restoring force on the inner peripheral portion of the female connecting portion, so that there is an effect that the sealing elastic ring does not come off from the predetermined position even when the tubular body is placed horizontally. Of.

[0011]

EXAMPLE An example of the elastic ring 1 for sealing the opening of the tubular body of the present invention will be described. First, as shown in FIG. 1 (a), the sealing elastic ring 1 is formed by forming an elongated O-shaped ring as a whole. The mold K for injection-molding the elastic ring 1 has the elastic ring 1 as shown in FIG. 1 (b).
Since the cavity 1s that shapes the mold is a small O-shaped small area, it is possible to provide two cavities 1s side by side for each mold K, and it is possible to take two elastic rings 1 per mold K. Becomes Therefore, the manufacturing efficiency of the elastic ring 1 is 1 of the elastic ring 1 per die K.
The effect is that the cost is doubled as compared with the individual picking, the manufacturing cost is low, and the unit price of the elastic ring 1 can be provided at a significantly low price. What has been described above is a feature that also applies to the connecting portions (male connecting portion and female connecting portion) of the cylindrical body described later.

Next, the elastic ring 1 for sealing the opening 6 of the tubular body 5 is provided with an inner diameter D in the major axis direction larger than the outer diameter of the outer peripheral portion of the tubular body 5 to be mounted (the one end 1c of the ring and others). The length between the end 1d) and the inner diameter d in the short axis direction (the length between the one end 1a and the other end 1b of the ring) smaller than the outer diameter of the outer peripheral portion 7, and An example in which the elastic ring 1 is used to attach to the outer peripheral portion 7 of the tubular body 5 is configured so as to have an inner peripheral portion that is slightly smaller than the outer periphery of the outer peripheral portion 7.
It will be described with reference to plan views of (a) to (d).

First, as shown in FIG. 2A, one end 1a of the ring of the elastic ring 1 in the short axis direction is attached to the outer peripheral portion 7 of the tubular body 5.
Hook from one side to the outside. Next, as shown in FIG. 2 (b), when the other end 1b of the ring in the short axis direction of the elastic ring 1 is gripped and pulled outward (arrow), the elastic ring 1 extends in the pulling direction and deforms. However, since the inner diameter D of the elastic ring 1 in the major axis direction is originally formed to be larger than the outer diameter of the outer peripheral portion 7 of the tubular body 5, the elastic ring 1 narrows so as to surround the outer peripheral portion 7 from the outside, After surrounding the outer peripheral portion 7 so as to support more than half of the outer peripheral portion 7, the outer peripheral portion 7 is crossed over the edge of the outer peripheral portion 7.
Is extended to the inner top surface of. Therefore, as shown in FIG. 2 (c), when the other end 1b side of the elastic ring 1 is grasped and pulled down, the elastic ring 1 extending to the upper surface of the edge of the outer peripheral portion 7 is extended.
The ring extends and spreads over the edge of the outer peripheral portion 7 and moves downward to surround the outer peripheral portion 7, so that the other end 1 of the elastic ring 1 is
When the grip on the b side is released, as shown in FIG. 2 (d), the elastic ring 1 is securely mounted at a predetermined position on the outer peripheral portion 7 and supported by the elastic force. In this way, the elastic ring 1 can be mounted by an extremely simple mounting method, and the working efficiency is enhanced.

After mounting the elastic ring 1 on the outer peripheral portion 7 of the cylindrical body 5 as described above, the opening 6 of the cylindrical body 5 is covered with a lid (not shown) for sealing. A lid that covers the opening 6 and the outer peripheral portion 7 of the tubular body 1 at the same time is used to cover the elastic ring 1 mounted on the outer peripheral portion to seal the opening 6 and the watertightness via the elastic ring 1. I try to improve the airtightness. Alternatively, as shown in FIG. 3, after the elastic ring 1 is attached to the outer peripheral portion 7 of the tubular body 5, the tubular body 5 is used as a lid to fit and seal the opening of another tubular body 5A. Can also be used for.

Next, an embodiment of the sealing elastic ring 11 used for the male connecting portion 16 provided at the end of the tubular body 15 of the present invention will be described with reference to the plan views of FIGS. explain. The sealing elastic ring 11 used for the male connecting portion 16 has an inner diameter in the longitudinal direction larger than the outer diameter of the outer peripheral portion 17 of the male connecting portion 16 to be mounted (the length between the one end 11c and the other end 11d of the ring). ) And having an inner diameter in the short axis direction smaller than the outer diameter of the outer peripheral portion 17 (the length between the one end 11a and the other end 11b of the ring) and slightly smaller than the outer periphery of the outer peripheral portion 17. This elastic ring 1 is configured to have an inner peripheral portion 12 of the circumference.
1 is attached to the outer peripheral portion 17 of the male connecting portion 16 of the tubular body 15. First, as shown in FIG. 4 (a),
One end 11a of the ring in the short axis direction of the elastic ring 11 is hooked from the outside to one end of the outer peripheral portion 17 of the male connecting portion 16. next,
As shown in FIG. 4 (b), when the other end 11b of the ring in the minor axis direction of the elastic ring 11 is gripped and pulled outward (arrow), the elastic ring 15 extends and deforms in the pulling direction. Originally, the inner diameter of the elastic ring 11 in the long axis direction is the same as that of the male connecting portion 1.
Since it is formed larger than the outer diameter of the outer peripheral portion 17 of 6,
The elastic ring 11 is narrowed so as to surround the outer peripheral portion 17 from the outside, surrounds the outer peripheral portion 17 so as to support more than half of the outer peripheral portion 17, and then extends beyond the edge of the outer peripheral portion 17 to the inner upper surface of the outer peripheral portion 17. Then, as shown in FIG. 4 (c), when the other end 11b side of the elastic ring 11 is gripped and pulled down, the ring of the elastic ring 11 extending to the upper surface of the edge of the outer peripheral portion 17 expands and expands. Since it moves over the edge and moves downward to surround the outer peripheral portion 17, when the grip on the other end 11b side of the elastic ring 11 is released here, the elastic ring 11 is surrounded by the outer peripheral portion of the male connecting portion 16 as shown in FIG. 4 (d). It is securely attached to a predetermined position of the portion 17 and is supported by elastic force. In this way, the elastic ring 11 can be attached to the tubular body 15 by an extremely simple mounting method.
The outer peripheral portion 17 of the male connecting portion 16 can be mounted, and the working efficiency is enhanced.

Furthermore, an embodiment of the elastic ring 21 for sealing used for the female connecting portion 26 provided at the end of the tubular body 25 is shown in FIG.
This will be described with reference to plan views of (a) to (d). The sealing elastic ring 21 used for the female connecting portion 26 of the tubular body 25 has an outer diameter in the longitudinal direction larger than the inner diameter of the inner peripheral portion 27 of the female connecting portion 26 to be mounted (one end 21c and the other end 21d of the ring). The inner diameter of the inner peripheral portion 27 and the outer diameter in the minor axis direction (the length between the one end 21a and the other end 21b of the ring) smaller than the inner diameter of the inner peripheral portion 27. The elastic ring 21 is configured to have an outer peripheral portion 22 having an outer periphery slightly larger than the inner periphery of 27.
Is attached to the inner peripheral portion 27 of the female connecting portion 26 of the tubular body 25. First, as shown in FIG. 5 (a), one end 21 c of the elastic ring 21 in the longitudinal direction is attached to the female connecting portion 2.
Apply from one side to one end of the inner peripheral portion 27 of 6. Next, FIG.
As shown in (b), when the other end 21d of the ring in the long axis direction of the elastic ring 21 is gripped and pressed inward (arrow), the elastic ring 25 expands and deforms in the direction perpendicular to the pressing direction. Since the outer diameter of the elastic ring 21 in the short axis direction is originally formed smaller than the inner circumference of the inner peripheral portion 17 of the female connecting portion 26, the elastic ring 21 spreads so as to approach the inner peripheral portion 27 from the inside. It will be pressed down. Then, as shown in FIG. 5C, when the other end 21d side of the elastic ring 21 is further pressed, the elastic ring 21 is deformed into a heart shape. When the other end 21d side of the elastic ring 21 is moved downward and the grip is released, the elastic ring 21 is restored to a predetermined position on the inner peripheral portion 27 of the female connecting portion 26 as shown in FIG. It is securely attached and supported by force. in this way,
The elastic ring 21 can be attached to the tubular body 2 by an extremely simple mounting method.
5 can be attached to the inner peripheral portion 27 of the female connecting portion 26 in an inscribed state, and the working efficiency is improved, and the elastic ring 21
Is intimately inscribed in the inner peripheral portion 27 of the female connecting portion 26 by a restoring force, so that even if the tubular body 25 is placed horizontally, the sealing elastic ring 21 does not come off from the predetermined position. The effect is also obtained.

As described above, the elastic ring 11 for sealing is used.
And 21 are attached to the outer peripheral portion 17 of the male connecting portion 16 of the tubular body 15 and the inner peripheral portion 27 of the female connecting portion 26, respectively, and then, as shown in FIG. Connection part 26
By fitting and connecting, the elastic rings 11 and 21 can significantly improve the airtightness and watertightness of the fitting portion.

[0018]

The elastic ring for sealing the opening portion and the connecting portion of the tubular body of the present invention constructed as described above is formed of synthetic rubber so as to form an elongated O-shaped ring as a whole. Therefore, the mold for injection-molding the elastic ring requires only a small area because the cavity that forms the elastic ring is an elongated O-shape, so two cavities can be provided side by side for each mold. Two elastic rings can be taken with one, the production efficiency is doubled compared with taking one elastic ring per die, the manufacturing cost is cheap, and the unit price of the elastic ring can be provided at a significantly low price. The effect is obtained.

Moreover, the elastic ring for sealing the opening of the tubular body has an inner diameter in the major axis direction larger than the outer diameter of the outer peripheral portion of the tubular body to be mounted and smaller than the outer diameter of the outer peripheral portion. Having an inner diameter in the minor axis direction, and by being configured to have an inner peripheral portion of an inner periphery that is slightly smaller than the outer periphery of the outer peripheral portion, after hooking one end of the elastic ring to one end of the tubular body,
By holding the other end of the elastic ring and pulling it, and then pulling the other end of the elastic ring down, the elastic ring can be attached to the outer periphery of the tubular body by a series of extremely simple operations. There is also an effect that high workability can be obtained.

Further, the sealing elastic ring used for the male connecting portion of the tubular body can be attached to the outer peripheral portion of the male connecting portion of the tubular body by an extremely simple attachment method similar to the above, and the work efficiency is improved. . Furthermore, the elastic ring for sealing used for the female connecting portion of the tubular body can be attached to the inner peripheral portion of the female connecting portion of the tubular body by a very simple attachment method, and the work efficiency is improved,
Moreover, since the elastic ring is inscribed in close contact with the inner peripheral portion of the female connecting portion by a restoring force, the sealing elastic ring does not come off from the predetermined position even if the tubular body is placed horizontally. Can also be obtained.

As described above, after attaching the sealing elastic rings to the outer peripheral portion of the male connecting portion and the inner peripheral portion of the female connecting portion of the cylindrical body, the male connecting portion and the female connecting portion are fitted together. When connecting multiple cylindrical bodies with each other, the airtightness of the fitting part by the elastic ring,
The watertightness can be greatly improved.

[Brief description of drawings]

FIG. 1 (a) is a plan view of an elastic ring 1 for sealing an opening of a tubular body of the present invention. (b) It is explanatory drawing of the metal mold | die K for injection molding of the elastic ring 1 of FIG. 1 (a).

FIG. 2 (a) is a plan view showing a state where one end of the ring of the elastic ring 1 shown in FIG. 1 (a) is hooked on one end of the outer peripheral portion 7 of the tubular body 5. 2B is a plan view showing a state where the other end of the ring of the elastic ring 1 shown in FIG. 2A is pulled. (c) FIG. 3 is a plan view showing a state where the other end of the ring of the elastic ring 1 shown in FIG. 2 (b) is pulled down. (d) FIG. 3 is a plan view showing a state where the elastic ring 1 shown in FIG. 2 (c) is attached to the outer peripheral portion 7 of the tubular body 5.

FIG. 3 is a half cross-sectional view showing a state in which the tubular body 5 having the elastic ring 1 mounted thereon is fitted to another tubular body 5A as a lid.

4 (a) is a plan view showing a state where one end of the ring of the elastic ring 11 for sealing of the present invention is hooked on one end of the outer peripheral portion 17 of the male connecting portion 16 of the tubular body 15. FIG. FIG. 4B is a plan view showing a state where the other end of the ring of the elastic ring 11 shown in FIG. 4A is pulled. (c) FIG. 5 is a plan view showing a state where the other end of the ring of the elastic ring 11 shown in FIG. 4 (b) is pulled down. 4D is a plan view showing a state in which the elastic ring 11 shown in FIG. 4C is attached to the outer peripheral portion 17 of the male connecting portion 16 of the tubular body 15.

5 (a) is a plan view showing a state in which one end of the ring of the elastic ring for sealing 21 of the present invention is applied to one end of the inner peripheral portion 27 of the female connecting portion 26 of the tubular body 25. FIG. FIG. 6B is a plan view showing a state where the other end of the ring of the elastic ring 21 shown in FIG. FIG. 6 (c) is a plan view showing a state where the other end of the ring of the elastic ring 21 shown in FIG. 5 (b) is further pushed. 5D is a plan view showing a state where the elastic ring 21 shown in FIG. 5C is attached to the inner peripheral portion 27 of the female connecting portion 26 of the tubular body 25.

FIG. 6 is a cylindrical body 15 to which elastic rings 11 and 21 are attached.
And FIG. 25 is a half cross-sectional view showing a state in which 25 are connected.

FIG. 7A is a plan view of a conventional sealing elastic ring 31. (b) Mold K for injection molding of the elastic ring 31 of FIG. 7 (a)
It is explanatory drawing of s.

8A is a plan view showing a state where one end of the ring of the elastic ring 31 shown in FIG. 7A is hooked on one end of the outer peripheral portion 37 of the tubular body 35. FIG. 8B is a plan view showing a state where the other end of the ring of the elastic ring 31 shown in FIG. 8A is pulled. (c) FIG. 9 is a plan view showing a state in which the elastic ring 31 shown in FIG. 8 (b) is disengaged from the outer peripheral portion 37 of the tubular body 35.

[Explanation of symbols]

1 Elastic ring for sealing the opening of the tubular body of the present invention
1s Cavity for elastic ring 1 of mold 2 Inner peripheral part of elastic ring 1, 5A Cylindrical body
6 Opening Portion of Cylindrical Body 7 Outer Peripheral Portion of Cylindrical Body 11 Elastic Ring for Sealing Male Connecting Portion of Cylindrical Body of the Present Invention
15 tubular body 16 male connecting portion of tubular body 17 outer peripheral portion of male connecting portion 21 elastic ring for sealing female connecting portion of tubular body of the present invention
25 tubular body 26 female connecting portion of tubular body 27 outer peripheral portion of female connecting portion 31 elastic ring for sealing opening of tubular body of conventional example
31s Cavity for elastic ring 31 of a conventional example of a mold 35 Cylindrical body 36 Opening of cylindrical body 37 Outer peripheral portion of cylindrical body D Inner diameter of major axis of elastic ring 1 d Short axis direction of elastic ring 1 Inner Diameter K, Ks Mold

Claims (3)

[Claims] 1. An elastic ring (1) molded of synthetic rubber so as to form a slender O-shaped ring as a whole, which is smaller than the outer diameter of the outer peripheral portion (7) of a tubular body (5) to be mounted. It has a large major axis inner diameter (D) and a minor axis inner diameter (d) smaller than the outer diameter of the outer peripheral portion (7), and the outer peripheral portion (7)
An elastic ring (1) for sealing an opening of a tubular body, which is configured to have an inner peripheral portion (2) having an inner periphery slightly smaller than the outer periphery of the. 2. An elastic ring (11) molded of synthetic rubber so as to form an elongated O-shaped ring as a whole, and an outer peripheral portion of a male connecting portion (16) of a tubular body (15) to be mounted. (17) has an inner diameter in the major axis direction larger than the outer diameter, and has an inner diameter in the minor axis direction smaller than the outer diameter of the outer peripheral portion (17), and an inner diameter slightly smaller than the outer periphery of the outer peripheral portion (17). An elastic ring (11) for sealing a male connecting portion (16) of a tubular body (15) configured to have an inner peripheral portion (12) of the circumference. 3. An elastic ring (21) formed of synthetic rubber so as to form an elongated O-shaped ring as a whole, and the inner circumference of a female connecting portion (26) of a tubular body (25) to be mounted. The outer diameter in the major axis direction is larger than the inner diameter of the portion (27), and the outer diameter in the minor axis direction is smaller than the inner diameter of the inner peripheral portion (27), and the inner periphery of the inner peripheral portion (27) is An elastic ring (21) for sealing a female connecting portion (26) of a tubular body (25) configured to have a slightly longer outer peripheral portion (22).