JP2011074998A - Protective cap for gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cap for a gas cock, including a cap part (1) fitted onto a gas outlet cylindrical part such as a plug part (3a) of the gas cock or a hose end part (3b) airtightly around the outer periphery, increasing installation holding force of the cap part (1) to the gas outlet cylindrical part to stably maintain the airtightness for a long period. <P>SOLUTION: The cap part (1) includes: a cylindrical body (10) of elastic material having an inner diameter smaller than a body outer diameter of the gas outlet cylindrical part and opened at one end; and a ring body (2) detachably fitted onto the cylindrical body. A ring body receiving portion (11) is provided in the outer peripheral face of the cylindrical body (10) for receiving the ring body (2) in a falling prevention manner. The inner diameter of a part or all of the inner peripheral face of the ring body (2) is set smaller than the outer diameter of a part or all of the ring body receiving portion (11) when the cylindrical body (10) is fitted onto the gas outlet cylindrical part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a protective cap for a gas stopper, in particular, when the gas stopper is not in use, is fitted on a gas outlet tube portion such as a plug portion of a gas stopper or a hose end portion to protect these portions and prevent gas leakage. The present invention relates to a protective cap for a gas stopper to prevent.

As a gas outlet tube portion of the gas plug, there is a plug portion to which a socket provided at the end of the gas pipe can be connected with one touch. The plug portion maintains the airtightness of the socket connection portion, and the internal valve mechanism is opened and closed by attaching and detaching the socket. For this reason, the open end of the plug part is closed with a protective cap so that foreign matter such as dust, oil and water does not enter the plug part when the socket is not connected, and is protected from external impacts. It is desirable to keep it.
As the protective cap, there is one disclosed in Japanese Utility Model Laid-Open No. 7-43674.
As shown in FIG. 10, a cylindrical cap portion (4) made of soft resin or synthetic rubber and open to one end is attached to the tip of the plug portion (3) protruding from the gas plug body (31). ) Is tightly fitted by utilizing its elasticity, and the open end of the plug portion (3) is closed in an outer airtight state by the elasticity of the cap portion (4). The cap portion (4) is integrally connected to an attachment ring (41) for mounting on the gas stopper main body (31) via a connection band (42).
On the inner peripheral surface of the cap part (4), provided on the outer peripheral surface of the plug part (3), at a predetermined position corresponding to the annular concave groove (30) for connecting the socket, the annular concave groove (30) An annular ridge (40) that can be inserted into the projection is provided, and the cap (4) is fitted onto the plug portion (3) so that the annular ridge (40) is fitted into the annular groove (30). Thus, the cap part (4) can be attached to the plug part (3) in a retaining state.

Thus, by closing the open end of the plug part (3) tightly with the synthetic rubber cap part (4), the inside of the plug part (3) is protected, and dust, water, etc. In addition, there is no inconvenience for foreign matter to enter or damage due to external impact, and even if gas leaks from the internal valve mechanism, the plug (3) is surrounded by the cap (4). Since it is sealed in an airtight state, gas leakage can also be prevented.
In addition, when not in use, generally, a protective cap made of a soft resin or a synthetic rubber is fitted into a gastight hose end of a gas stopper in which a pipe is connected by a rubber pipe stopper.

Japanese Utility Model Publication No. 7-43674 Japanese Utility Model Publication No. 47-4480

However, since the place where the gas stopper is installed is near the gas stove or sink in the kitchen, the protective cap is easily affected by heat, water, hot water, detergent, oil, seasoning and the like.
Since the cap part (4) of the above-mentioned conventional protective cap is a molded body such as an elastic soft resin or synthetic rubber, the cap part (4) is splashed with water, hot water, oil, detergent, etc. In other words, the cap part (4) may be deformed or deteriorated, resulting in a decrease in elasticity. When the elasticity is lowered, there is an inconvenience that the attaching and holding force of the cap part (4) with respect to the plug part (4) and the hose end part becomes insufficient, and the airtightness is lost, or finally it is accidentally detached.

  In particular, a two-port gas plug provided with two plug parts (3) serving as gas outlets, one of the two plug parts (3) is in use with a socket connected, and the other is When the cap part (4) is not in use and in the unused state, the operation knob of the plug part (3) in the unused state may be mistakenly operated in the opening direction. At this time, if the elasticity of the cap part (4) is reduced and the airtightness is impaired, the gas may leak outside through the gap between the plug part (3) and the cap part (4). For a large amount of gas leakage, the overflow prevention valve built in the gas stopper operates, so that the outflow of gas from the plug part (3) is blocked. It is dangerous because the valve does not operate and a slight gas leak continues.

  The present invention has been made in view of such a point, and “a protective cap for a gas stopper including a cap portion fitted in a gas outlet tube portion such as a plug portion of a gas plug or a hose end portion in an outer airtight state” In the above, it is an object to increase the mounting holding force of the cap portion with respect to the gas outlet tube portion so that the airtightness of the cap portion can be maintained in a stable state over a long period of time.

(1) The protective cap for a gas stopper of the invention according to claim 1 is: “The cap portion has an inner diameter smaller than the outer diameter of the body portion of the gas outlet tube portion, and a cylindrical body made of one open elastic material; It consists of a ring body detachably fitted to the cylinder body,
An annular ring body accommodating portion capable of accommodating the ring body in a fall-off prevention state is provided on the outer peripheral surface of the cylindrical body,
The inner diameter of a part or all of the inner peripheral surface of the ring body is set to be smaller than the outer diameter of a part or all of the ring body housing part when the cylinder body is fitted on the gas outlet cylinder part. It is characterized by being ".

The above means operates as follows.
In order to attach the ring body to the cylinder body, the cylinder body made of an elastic material is inserted into the ring body while reducing the diameter thereof, and the ring body is externally fitted to the cylinder body, and provided on the outer peripheral surface of the cylinder body. Is accommodated in the ring body accommodating portion. Thereby, the cap part of the state which made the ring body externally fit in a cylinder is comprised. The ring body is housed in the ring body housing portion in a drop-off prevention state, but can be forcibly removed from the ring body housing portion and removed from the cylinder body.
Since the cylinder inner diameter of the cylinder in the natural state is set slightly smaller than the outer diameter of the cylinder of the gas outlet cylinder, the gas outlet cylinder which is the plug part of the gas stopper or the hose end is used as the cylinder. As the tube is inserted, the diameter of the cylindrical body is increased in order from the open end, and accordingly, the outer diameter of the ring body accommodating portion is also increased. Since the inner diameter of a part or all of the inner peripheral surface of the ring body is formed to be smaller than part or all of the expanded ring body housing part, the ring body housing part is partly formed by the ring body. Or in the radial direction over the entire area.
As a result, the cylindrical body is fitted into the outer gas tight state due to its elasticity to the gas outlet cylindrical portion, and the close contact state is reinforced by the tightening force of the ring body.
When removing the cap part, the gas outlet cylinder part may be forcibly pulled out from the cylinder, but if the cylinder is fixed to the gas outlet cylinder part due to long-term use, the ring body should be removed first. If it takes out from a ring body accommodating part and removes from a cylinder, it will become easy to remove a cylinder from a gas outlet cylinder.

(2) The protective cap according to the second aspect of the present invention is the protective cap according to the first aspect, wherein “the ring body is made of an elastic body that can be expanded and contracted, and the diameter reducing force is reduced by the elasticity of the cylindrical body. The ring body can be externally fitted to the cylinder body while expanding the diameter of the ring body and simultaneously reducing the diameter of the cylinder body. Further, since the diameter reducing force of the ring body is set to be approximately the same as that of the cylinder body, the cylinder body expands and contracts together with the ring body when the cylinder body is attached to or detached from the gas outlet cylinder portion. Moreover, even if the elasticity of the cylinder deteriorates due to long-term use, the holding force of the cylinder to the gas outlet cylinder can be maintained by the diameter reducing force of the ring.
As the elastic body, as in the invention according to claim 3, "the ring body is constituted by a coil spring" or as in the invention according to claim 4, "the ring body has a cross-section. It is possible to adopt a “comprising a C-shaped cylindrical thin plate”. In the third aspect of the present invention, it is possible to adopt a ring spring configured in an annular shape by joining both ends of a coil spring having a predetermined length. In the fourth aspect of the present invention, slits that are open at both ends are formed. A thin plate bent into a cylindrical shape can be used.

(3) A protective cap according to a fifth aspect of the present invention is the protective cap according to any one of the above-mentioned claims, wherein “the ring body is a cylindrical shape that is open at both ends or covers one side of the outer peripheral surface of the cylindrical body. Composed of
In a state where the ring body is accommodated in the ring body accommodating portion, a space is formed between the inner peripheral surface of the ring body and the annular bottom surface of the ring body accommodating portion. Alternatively, a ring body formed in an open cylindrical shape is externally fitted to the cylinder body, so that the substantially entire area of the outer surface of the cylinder body is covered with the ring body, and the cylinder body includes heat, water, hot water, and detergent. Protected from oil and external impacts. Further, since the ring body is not housed in close contact with the annular bottom surface of the ring body housing part and is accommodated in a state where a space is formed between the ring body and the tubular body, When fitting, the diameter of the barrel portion of the cylinder is secured by the space.

(4) A protective cap according to a sixth aspect of the present invention is the protective cap according to any of the above-mentioned claims, wherein, in the state in which the ring body is accommodated in the ring body accommodating portion, the open portion of the ring body accommodating portion. In the case where the cover portion covering a part or substantially the entire area of the cylinder body is provided integrally with the cylinder body, by providing the cover section, the cap section has a three-layer structure of the cylinder body, the ring body, and the cover section. Thus, the ring body is securely held in the drop-off prevention state by the cover portion.

As described above, according to the first aspect of the present invention, the gas outlet cylinder is forced into the cylinder by inserting the gas outlet cylinder such as the plug part of the gas stopper and the hose end into the cylinder. And the ring body is tightened doubly by the tightening force. Thereby, the mounting | wearing holding force of the cap part with respect to a gas outlet cylinder part becomes firm and reliable. Even if the cylinder made of an elastic material such as synthetic rubber or synthetic resin is deformed or deteriorates due to the influence of heat, water, hot water, oil, detergent, etc., its elasticity may be lowered. Since the tightening force by the body does not decrease, the mounting holding force and airtightness of the cylinder with respect to the gas outlet cylinder are maintained. Therefore, the cap part which can protect a gas outlet cylinder part reliably and stably over a long term can be provided.
In addition, since the ring body is housed in the tubular body housing portion in a drop-off prevention state, the ring body will not accidentally fall off from the tubular body, but can be removed from the tubular body if necessary. When removing the cylindrical body fixed to the outlet cylindrical portion, the cylindrical body can be easily removed by first removing the ring body from the cylindrical body.

According to the invention which concerns on Claim 2, while the attachment or detachment operation | work to the gas outlet cylinder part of the state which made the ring body externally fit becomes easy in addition to attachment / detachment of the ring body to a cylinder body, removal work is carried out. It becomes easy to do. Furthermore, even if the elasticity of the cylinder is impaired, the holding force of the cylinder with respect to the gas outlet cylinder can be maintained by the diameter reducing force of the ring, so that it can be mounted for a longer period while maintaining airtightness. .
In addition, as a ring body having elasticity, a ring spring as described in claim 3 or a thin plate as described in claim 4 bent into a cylindrical shape can be adopted.

  According to the invention of claim 5, since the outer peripheral surface of the cylindrical body is protected almost entirely by the ring body, the external impact on the cylindrical body and the influence of water, hot water, oil, detergent, etc. Can be relaxed. Therefore, it is possible to prevent the cap portion from being deteriorated, and even in a kitchen that is susceptible to these effects, the protective cap can be installed without losing the sealing performance while maintaining the attachment holding force to the gas outlet tube portion. Can be used for a long time. In addition, since a space is provided between the inner peripheral surface of the ring body and the bottom surface of the ring body accommodating portion to ensure the diameter of the cylinder body, the cylinder is attached when the cap portion is attached to the gas outlet cylinder portion. The body torso can be easily expanded in diameter. Therefore, the mounting operation of the cap portion can be performed smoothly.

  According to the invention of claim 6, the ring body can be reliably prevented from falling off, and the ring plate can be protected from water, hot water, oil, detergent, bleach or the like. Can be prevented. When the gas outlet cylinder is inserted into the cylinder, the gas outlet cylinder is covered with the three layers of the cylinder, the ring body, and the cover, so that the cap outlet is attached to the gas outlet cylinder. The force and sealing performance are further ensured.

The top view of the gas stopper which shows the state which attached the protective cap of 1st Embodiment of this invention to the plug part and the hose end part, respectively. Sectional drawing of the protective cap fitted to a plug part among the protective caps of 1st embodiment of this invention. Sectional drawing which shows a mode that the cap part of the protective cap of 2nd Embodiment of this invention was fitted to the plug part. The perspective view of the ring board employ | adopted as the protective cap of 2nd Embodiment of this invention. Sectional drawing of the cap part of the protective cap of 3rd Embodiment of this invention. Sectional drawing of the cap part of the protective cap of 4th Embodiment of this invention. Sectional drawing of the cap part of the protective cap of 5th Embodiment of this invention. Sectional drawing of the cap part of the protective cap of 6th Embodiment of this invention. Sectional drawing of the cap part of the protective cap of 7th Embodiment of this invention. Explanatory drawing of the conventional protective cap.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the gas stopper to which the protective cap according to the embodiment of the present invention is attached is a so-called two-neck gas stopper in which two gas outlet cylinders are provided in one gas stopper main body (31). It is used by being fixed to an indoor side wall surface, a sink, a top plate of a cooking table, or the like. One of the gas outlet tube portions of the gas stopper shown in FIG. 1 is a plug connecting portion (3a) for connecting a socket, and the other is a hose end portion (3b) for connecting a gas rubber tube.
When these plug parts (3a) and hose end parts (3b) are not in use, the gas stopper is closed, but ensuring higher safety and ensuring that the plug parts (3a) and hose end parts (3b) In order to prevent entry of foreign matter from the open end, protective caps are respectively fitted.

The protective cap according to the first embodiment of the present invention will be described below.
The protective cap is composed of a synthetic rubber, one open cylinder (10) to be fitted to the cylindrical body (32) of the plug part (3a) and the hose end part (3b), and the outer periphery of the cylinder (10). The cap part (1) is comprised from the ring body fitted in the ring body accommodating part (11) provided so that it may open | release to the surface side. In 1st Embodiment, in the said ring body As an example, a metal ring spring (2) that is urged in the reduced diameter direction is employed. The cap portion (1) is connected to an attachment ring (35) attached to the gas plug main body (31) through a connection band (34) connected to the open end of the cylindrical body (10). Yes.

FIG. 2 is a cross-sectional view of a protective cap provided with a cap portion (1) to be fitted to the plug portion (3a).
The inner diameter of the cylindrical body (10) is slightly smaller than the outer diameter of the cylindrical body (32) of the plug portion (3a), and the plug portion (3a) An annular ridge (13) that can be fitted into an annular groove (30) formed on the outer surface of the cylindrical body (32) is projected over the entire circumferential direction.

Further, on the outer peripheral surface of the cylindrical body (10) corresponding to the annular concave groove (30), an annular ring body accommodating portion (11) for accommodating the ring spring (2) is opened in the circumferential direction. Yes.
As the ring spring (2), it is possible to employ a ring spring formed by joining both ends of a coil spring having a predetermined length, and the width of the ring body accommodating portion (11) constitutes the ring spring (2). Is set to be slightly larger than the outer diameter of the coil spring, and the locking protrusions (12) for preventing the ring spring (2) from falling off from the opposite open end edges of the ring body accommodating portion (11). ) (12) protrudes in the direction close to each other.
In addition, the inner diameter of the ring spring (2) in the natural state is set to be approximately equal to the outer diameter of the annular bottom surface (14) of the ring body housing portion (11), and the ring spring (2) is compressed. The radial force is set to be approximately the same as the reduced diameter force due to the elasticity of the synthetic rubber constituting the cylindrical body (10).

  In order to accommodate the ring spring (2) in the ring body accommodating portion (11), the diameter of the ring spring (2) is expanded, and the cylinder (10) is inserted into the ring spring (2) from the closed end side. What is necessary is just to mount | wear to a ring body accommodating part (11). Since the cylindrical body (10) is entirely formed of an elastic material, the ring spring (2) passes between the locking protrusions (12) and (12) while forcibly deforming the locking protrusions (12) and (12). Then, it is accommodated in the ring body accommodating portion (11) in a substantially contact state with the annular bottom surface (14).

  When attaching the cap part (1) in which the ring spring (2) is accommodated in the ring body accommodating part (11) to the plug part (3a) of the gas stopper, the plug (3) is inserted from the open end of the cylindrical body (10). Force part (3a). Since the dimensional relationship between the inner diameter of the cylindrical body (10) and the outer diameter of the cylindrical body part (32) of the plug part (3a) is as described above, as the plug part (3a) is inserted, the cylindrical body The inner diameter of the barrel portion of (10) is increased, and accordingly, the outer diameter of the annular bottom surface (14) of the ring body accommodating portion (11) is also increased together with the ring spring (2).

  When the plug portion (3a) is inserted into the cylindrical body (10) in the manner described above, the annular ridge (13) provided on the cylindrical body (10) becomes the annular concave groove (30) of the plug portion (3a). At the time corresponding to, the annular ridge (13) is fitted and held in the annular groove (30). This state is a state where the cap part (1) is completely attached, and the cap part (1) is elastic against the body part (32) of the plug part (3a) and the elasticity of the cylindrical body (10) and the ring spring (2). The outer circumferential airtight state is brought into close contact by the diameter reducing force caused by, and the rotation is prevented by the friction force generated between the cylindrical body (10) and the body portion (32). By being inserted into (30), it is fixed in a retaining state.

The cylinder (10) is in close contact with the plug part (3a) due to its own elasticity, but is deformed or deteriorated due to heat, water, hot water or oil during cooking. Sometimes. Even in such a case, the diameter reducing force of the ring spring (2) continues to act on the cylindrical body (10), so that the cap portion (1) is securely and for a long time while maintaining the sealing performance (3a ).
Even if the built-in valve device is opened by accidentally turning the operation knob of the plug portion (3a) that is not in use, the cap portion (1 As long as) is installed, gas is not leaked to the outside and is safe.

  The left side of FIG. 1 shows a state in which the cap portion (1) is fitted to the hose end portion (3b), and the ring body accommodating portion (11) is provided in the vicinity of the open end of the cylindrical body (10). ing. In this case, according to the shape of the outer peripheral surface of the barrel portion (32) of the hose end portion (3b), the cylindrical body (10) is closely attached to the barrel portion (32). In addition, the size and length of the cylindrical body (10) are configured to match the outer diameter and length of the body portion (32) of the hose end portion (3b), and are fitted to the hose end portion (3b). In this state, the entire barrel portion of the hose end portion (3b) is tightened by the diameter reducing force due to the elasticity of the cylinder (10), and the hose end portion (3b) is reduced by the diameter reducing force of the ring spring (2). The base end of the is firmly tightened.

In order to remove the cap part (1), the cylinder (10) may be forcibly pulled and removed from the plug part (3a) or the hose end part (3b).
If the cylinder (10) is stuck to the plug (3a) or the body (32) of the hose end (3b) due to long-term use, the ring spring (2) is first expanded in diameter. If it is taken out from the body housing part (11), separated from the cylinder (10), and then removed so that the cylinder (10) is forcibly peeled off, the removal work is easy.

FIG. 3 shows the protective cap of the second embodiment. As a ring body, a thin metal plate as shown in FIG. 4 is bent into a cylindrical shape so that a slit (22) is formed. A ring plate (20) having a substantially C-shaped cross section is employed.
In the vicinity of the open end of the outer peripheral surface of the cylindrical body (10), an annular convex portion (15) is projected over the entire circumference, and at each of the positions facing each other at substantially the center of the outer peripheral surface. The mating projections (16) and (16) are projected.
The ring plate (20) has an inner diameter that substantially matches the outer diameter of the cylindrical body (10) in a natural state before being fitted to the plug portion (3a) or the hose end portion (3b), and the cylindrical body (10). The outer peripheral surface is formed in a cylindrical shape having a length that can be fitted over substantially the entire region. When the ring plate (20) is attached to the cylindrical body (10) so that the open end of the ring plate (20) is in contact with the annular convex portion (15), the engagement projections (16) (16) Engagement holes (21) and (21) into which the engagement protrusions (16) and (16) can be inserted in a close fitting state are formed at the corresponding positions.

The cylindrical body (10) of the ring plate (20) is in a state where one end is in contact with the annular protrusion (15) and the engagement projections (16) (16) are closely fitted in the engagement holes (21) (21). The entire region of the outer peripheral surface of the cylindrical body (10) continuing from the annular convex portion (15) to the closed end side functions as the ring body accommodating portion (11) and the engagement protrusion (16). When (16) is inserted into the engagement holes (21) and (21) in a close fitting state, the ring plate (20) is externally fitted to the cylindrical body (10) in a retaining state.
As described above, the inner diameter of the ring plate (20) of the second embodiment is substantially the same as the outer diameter of the cylinder (10) in the natural state, but the slit (22) is provided. Therefore, it can be scaled. Therefore, the ring plate (20) expands in diameter together with the cylinder (10) when the plug part (3a) or the hose end part (3b) is inserted into the cylinder (10), and the plug part (3a) Alternatively, after the insertion of the hose end portion (3b) is completed, the hose end portion (3b) has a function of tightening the outer peripheral surface of the cylinder (10) with the diameter expanded.
When removing the cylinder (10) from the plug (3a) or hose end (3b), it is only necessary to forcibly pull the cylinder (10) with the ring plate (20). It is also possible to enlarge the diameter of only the ring plate (20) and remove it from the cylindrical body (10) first.

In the third embodiment shown in FIG. 5, engaging projections (17), (17) having a substantially L-shaped cross section are formed at both ends of the open end and the closed end on the outer peripheral surface of the cylinder (10). The ring plate (20) is accommodated in an annular groove formed between the engagement protrusions (17) (17) and the outer peripheral surface of the cylindrical body (10). By doing so, the ring body accommodating portion (11) is configured. As the ring body (20), one similar to that employed in the second embodiment can be employed, but the engagement holes (21) and (21) are not required.
The ring plate (20) is held in a retaining state by the engagement protrusions (17) and (17), and as described in the second embodiment, the plug portion (3a ) Or the hose end (3b) is inserted, the diameter of the cylinder (10) is expanded and the cylinder (10) is fitted to the plug (3a) or the hose end (3b). The outer peripheral surface of the cylinder (10) is configured to be tightened over substantially the entire area.

FIG. 6 shows a protective cap according to the fourth embodiment. Steps (18) and (18) are provided at both ends of the open end and closed end of the outer peripheral surface of the cylinder (10). (18) An annular projecting piece (19) (19) projecting outward from (18) is provided, and a ring plate (20) having the same configuration as that of the third embodiment is provided. When the cylinder (10) is externally fitted so as to be placed on the parts (18) and (18), the ring plate (20) is placed between the annular projecting pieces (19) and (19) so as to be tightly accommodated. The dimensions are assumed to be set. In the case of this embodiment, the range surrounded by the annular projecting pieces (19) and (19) is the ring body accommodating portion (11), but the annular bottom surface (14) of the ring body accommodating portion (11) and the stepped portion (18) A space (S) having a predetermined width is formed between the ring plate (20) installed in (18).
When the plug (3a) or the hose end (3b) is inserted into the cylinder (10), the diameter of the barrel of the cylinder (10) is increased as shown by the two-dot chain line in FIG. Since it is secured by (S), the cylinder (10) is easy to expand in diameter. Therefore, it is easy to fit the cylindrical body (10) to the plug portion (3a) or the hose end portion (3b).
Since the ring plate (20) is in a mode of tightening the step portions (18) and (18), there is no problem in the mounting holding force of the cylindrical body (10). In addition, it has a sufficient sealing property for long-term mounting.

FIG. 7 shows the protective cap of the fifth embodiment, which is a modification of the fourth embodiment. In the state where the ring plate (20) is installed on the step portions (18) (18) between the annular projecting pieces (19) (19), the annular bottom surface (14) of the ring body accommodating portion (11) and the ring plate ( A space (S) is formed between the inner peripheral surface of 20) and a projection (23) that is substantially in contact with the ring plate (20) is partially or from the substantially central portion of the annular bottom surface (14). Projected over the entire circumference.
Even with this, the diameter of the cylindrical body (10) can be secured in the space (S), and the ring plate (20) is in a mode of tightening the protrusion (23) in addition to the stepped portions (18) (18). By making the position of the protrusion (23) coincide with the maximum diameter portion of the hose end portion (3b), the tightening strength and sealing performance by the ring plate (20) are sufficient. In addition, the presence of the space (S) allows light insertion into the hose end portion (3b).

Further, in the protective cap of the sixth embodiment shown in FIG. 8, the ring plate (20) is accommodated in the ring body between the annular projecting pieces (19) (19) formed on the outer peripheral surface of the cylindrical body (10). An annular cover that covers the outside of the ring plate (20) by being accommodated in the part (11) and extending the annular projecting piece (19) on the open end side of the cylindrical body (10) toward the closed end side Part (29) is formed.
By providing the cover part (29), the peripheral wall of the cap part (1) has a three-layer structure of the peripheral wall (10a) of the cylindrical body (10), the ring plate (20), and the cover part (29). Even if the cap part (1) is heated by heat during cooking, or if it is exposed to water, hot water, oil, detergent, etc., these effects may directly affect the peripheral wall (10a) of the cylinder (10). Therefore, the peripheral wall (10a) of the cylindrical body (10) will not be deformed or deteriorated, and it will have sufficient sealing properties for long-term mounting on the plug (3a) or hose end (3b). The fitted state is maintained in the state having the. Further, since the ring plate (20) is not exposed to water, hot water, oil, detergent, bleach or the like, corrosion of the ring plate (20) can be prevented.

The ring plate (20) in each of the above embodiments is formed in a cylindrical shape covering the outer peripheral surface of the cylindrical body (10). In the seventh embodiment shown in FIG. As described above, a cylindrical cover cap (24) that is open and covers substantially the entire area of the cylinder (10) is employed.
On the open end side of the cylindrical body (10), as shown in the cylindrical part (10) of the second embodiment shown in FIG. Convex portions (15b) and (15c) are also provided so as to project from the sides and the substantially central portion of the outer peripheral surface. The convex portions (15b) and (15c) may be provided partially in addition to the entire circumferential direction of the outer peripheral surface.
Annular grooves (25) and (26) into which the convex portions (15c) and (15b) are respectively fitted are formed in a substantially central portion of the inner peripheral surface of the covering cap (24) and in the vicinity of the closed end.
When the covering cap (24) is fitted to the cylindrical body (10), the open end of the covering cap (24) comes into contact with the annular convex portion (15a) on the open end side of the cylindrical body (10), and the convex portion ( 15c) is fitted into the annular groove (25), and the protrusion (15b) is fitted into the annular groove (26). That is, in this embodiment, the space from the annular convex portion (15a) to the convex portion (15b) functions as the ring body accommodating portion (11), and the convex portion (15c) becomes the annular concave groove (25). By fitting, the covering cap (24) is held in a state of being prevented from coming off from the cylindrical body (10).

In the seventh embodiment, the cylinder (10) is not exposed to the outside because almost the entire cylinder (10) is accommodated in the covering cap (24). Therefore, the cylindrical body (10) can be reliably protected, and the space between the cylindrical body (10) and the covering cap (24) is the height of the convex portions (15b) (15c) ( S) is formed, so when inserting the plug part (3a) or the hose end part (3b) into the cap part (1) (the one in FIG. 9 is for mounting the hose end part (3b)), the cylinder The body of (10) can be easily expanded in diameter, and the plug (3a) or hose end (3b) can be easily inserted into the cap (1). In addition, since the convex portions (15b) and (15c) are tightened by the bottom portions of the annular concave grooves (25) and (26) of the covering cap (24) after the mounting is completed, reliable holding performance and sealing performance can be expected.
Among the examples of the protective caps of the above-described embodiments, the cap part (1) shown in FIGS. 2, 3 and 6 is for mounting the plug part (3a), and FIGS. The cap part (1) shown is for mounting the hose end part (3b), but the plug part (3a) and the hose end part can be changed by changing the shape and overall length of the inner peripheral surface of the cylinder (10). It goes without saying that it can function as the cap portion (1) for either (3b).

(1) .... Cap part
(10) ... Cylinder
(11) .... Ring body housing
(2) (20) (24) ・ ・ ・ Ring body
(3a) .... Plug part
(3b) ... Hose end

Claims (6)

In a protective cap for a gas stopper comprising a cap part fitted in a gas outlet tube part such as a plug part of a gas stopper or a hose end part in an airtight state on the outer periphery,
The cap part comprises a cylindrical body made of one open elastic material having an inner diameter smaller than an outer diameter of the body part of the gas outlet cylindrical part, and a ring body that is detachably fitted to the cylindrical body,
An annular ring body accommodating portion capable of accommodating the ring body in a fall-off prevention state is provided on the outer peripheral surface of the cylindrical body,
The inner diameter of a part or all of the inner peripheral surface of the ring body is set to be smaller than the outer diameter of a part or all of the ring body housing part when the cylinder body is fitted on the gas outlet cylinder part. A protective cap for a gas stopper, characterized in that   2. The protective cap for a gas stopper according to claim 1, wherein the ring body is made of an elastic body that can be expanded and contracted, and the diameter reducing force thereof is set to be substantially the same as the diameter reducing force due to the elasticity of the cylindrical body. Special protective cap for gas stopper.   The protective cap for gas plugs according to claim 2, wherein the ring body is constituted by a coil spring.   The protective cap for gas stoppers according to claim 2, wherein the ring body is formed of a cylindrical thin plate having a C-shaped cross section. In the protective cap for gas stoppers in any one of Claim 1 to 4, the said ring body is comprised by the cylinder shape of the both ends open or one side opening which covers the substantially whole region of the outer peripheral surface of the said cylinder,
In a state where the ring body is accommodated in the ring body accommodating portion, a space is formed between the inner peripheral surface of the ring body and the annular bottom surface of the ring body accommodating portion. Protective cap for stopper.   In the protective cap for gas stoppers in any one of Claim 1 to 5, in the state which accommodated the said ring body in the said ring body accommodating part, a part of open part of the said ring body accommodating part or substantially the whole region is used. A cover cap for a gas stopper, wherein a covering cover portion is provided integrally with the cylindrical body.

Images