JP2010281365A - Protective cap for gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cap for gas cocks, which is configured to protect a connected portion of a gas cock and to prevent the excessive flow of a gas by an excessive-flow prevention mechanism on an erroneous opening operation. <P>SOLUTION: The protective cap for gas cocks is attached to the connected portion 10 of a gas cock 2 in which the excessive-flow prevention mechanism 14 for a gas is incorporated. This protective cap has a cap body 32 which is so attached as to cover the connected portion 10 of the gas cock 2. The cap body 32 has an end wall 36 which faces the connected portion 10. With the cap attached to the connected portion 10, a discharge space 46 exists between the end wall 36 of the cap body 32 and the tip end of the connected portion 10. Furthermore, discharge holes 40 for discharging outside a fuel gas discharged in the discharge space 46 are provided in the cap body 32. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a protective cap for a gas plug that is attached to a connection portion of a gas plug.

  For example, a gas stopper is provided in order to supply fuel gas from a gas buried pipe to a gas appliance such as a gas stove (for example, see Patent Document 1). Such a gas plug includes a gas plug main body provided with a supply flow path, a first connection portion is provided on the base side of the gas plug main body, and a second connection portion is provided on the distal end side thereof. The supply channel is provided with an excessive outflow prevention mechanism for preventing excessive outflow of gas. For example, a gas pipe connected to a gas buried pipe is connected to the first connection portion of the gas plug body, and a gas hose connected to a gas device is connected to the second connection portion.

  When such a gas stopper is not used (in other words, when a gas hose is not connected to the connection portion, for example), the connection portion is protected from dust and the like, and the gas when the gas stopper is accidentally opened is used. In order to prevent the outflow, a protective cap for a gas stopper is attached to this connection portion. The protective cap is formed of, for example, a synthetic resin, and seals between the connecting portion of the gas plug main body in the mounted state, and prevents dust and the like from adhering to the connecting portion and gas outflow during an erroneous opening operation.

JP 2005-207495 A

  When using the gas cap protective cap described above, there is no problem if the gas plug main body is kept in a sealed state, but the protective cap cracks due to changes over time, and the customer can attach it to the connection portion. If it is incomplete, the gas leaks between the connecting portion and the protective cap, which is not preferable for safety.

  An object of the present invention is to provide a protective cap for a gas stopper that protects the connection portion of the gas stopper and prevents the outflow of gas by an excessive outflow prevention mechanism built in the gas stopper at the time of erroneous opening operation. .

The protective cap for a gas stopper according to claim 1 of the present invention is a protective cap for a gas stopper that is attached to a connecting portion of a gas stopper in which a gas overflow prevention mechanism is incorporated,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space is present between the connection portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged to the discharge space to the outside. It is characterized by.

  Further, in the protective cap for a gas stopper according to claim 2 of the present invention, the discharge hole is provided with a selectively permeable member that allows permeation of fuel gas and prevents permeation of liquid. Features.

The protective cap for a gas stopper according to claim 3 of the present invention is a protective cap that is attached to a connecting portion of a gas stopper in which a gas overflow prevention mechanism is incorporated,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space exists between the portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the gas released into the discharge space to the outside. In addition, a thin portion that can be elastically deformed is provided in a part thereof, and the discharge hole is opened and closed by elastic deformation of the thin portion.

Moreover, the protective cap for a gas stopper according to claim 4 of the present invention is a protective cap attached to a connecting portion of a gas stopper in which a gas overflow prevention mechanism is incorporated,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space is present between the connection portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged to the discharge space to the outside. And an opening / closing member is disposed so as to be movable between a first position and a second position in the discharge space, and when the opening / closing member is in the first position, the discharge The space and the discharge hole are communicated, and when the opening / closing member is in the second position, the communication between the discharge space and the discharge hole is blocked.

Furthermore, the protective cap for a gas stopper according to claim 5 of the present invention is a protective cap attached to a connecting portion of a gas stopper in which a gas overflow prevention mechanism is incorporated,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space exists between the first portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged from the discharge space to the outside. In addition, an opening / closing member is disposed in the discharge hole so as to be movable between a first position and a second position. When the opening / closing member is in the first position, the opening / closing member opens the discharge hole. In the second position, the opening and closing member closes the discharge hole.

  According to the protective cap for a gas stopper of the first aspect of the present invention, since the cap body is mounted on the connection portion of the gas stopper body, the connection portion can be protected by the cap body, and the connection portion. It is possible to prevent dust from adhering to the surface. The cap body has an end wall portion that faces the connecting portion of the gas plug body, and there is a discharge space between the end wall portion of the cap body and the distal end portion of the connecting portion of the gas plug body, and the cap body Is provided with a discharge hole, so that when the gas plug is erroneously opened, gas flows into the discharge space through the connection portion of the gas plug, and is released from the discharge space into the atmosphere through the discharge hole. Therefore, this gas flow activates the function of preventing excessive spillage built into the gas stopper, prevents excessive spillage of the gas, prevents gas spillage, and eliminates the occurrence of minute gas leakage during erroneous opening operation. The

  Further, according to the protective cap for a gas stopper according to claim 2 of the present invention, since the selectively permeable member is provided in the discharge hole, the permeation of the fuel gas through the selectively permeable member is allowed. However, the permeation of the liquid is blocked, and thus the gas can be released when the gas stopper is accidentally opened, but the liquid (for example, water) is prevented from adhering to the connection portion through the selectively permeable member. Is done.

  According to the gas stopper protective cap of the present invention, in addition to the protective function of the cap body, there is a discharge space between the end wall portion of the cap body and the distal end portion of the connecting portion of the gas stopper. Furthermore, since the cap body is provided with a discharge hole, and a thin part that can be elastically deformed is provided at a part of the cap body, the discharge hole is normally kept closed and passed through the discharge hole. When the gas plug is accidentally opened, gas flows into the discharge space through the gas plug connection, and this gas flow causes the thin wall of the cap body to elastically deform and discharge. The holes are opened and released into the atmosphere. Therefore, the gas flow causes an overflow prevention function built in the gas stopper to prevent excessive gas outflow.

  According to the gas stopper protective cap of the present invention, in addition to the protection function by the cap body, there is a discharge space between the end wall portion of the cap body and the tip portion of the connecting portion of the gas stopper. In addition, the cap main body is provided with a discharge hole, and the opening / closing member is movably disposed between the first position and the second position in the discharge space. When the opening / closing member is located at the second position, the communication between the discharge space and the discharge hole is blocked, so that the entry of dust or the like through the discharge hole can be prevented. Flows into the discharge space through the connecting portion of the gas stopper, and the gas flow causes the opening / closing member to be positioned at the first position, and the discharge space and the discharge hole communicate with each other to be discharged into the atmosphere. Therefore, the gas flow causes an overflow prevention function built in the gas stopper to prevent excessive gas outflow.

  Furthermore, according to the protective cap for a gas stopper according to claim 5 of the present invention, in addition to the protection function by the cap body, the discharge space is provided between the end wall portion of the cap body and the distal end portion of the connecting portion of the gas stopper. Furthermore, the cap body is provided with a discharge hole, and the opening / closing member is disposed in the discharge hole so as to be movable between the first position and the second position. The opening / closing member is positioned at the second position so that the discharge hole is closed, and dust and the like can be prevented from entering through the discharge hole. When the gas plug is erroneously opened, gas passes through the connection portion of the gas plug. The gas flows into the discharge space, and by this gas flow, the opening / closing member is located at the first position, the discharge hole is opened, and the gas is discharged into the atmosphere. Therefore, the gas flow causes an overflow prevention function built in the gas stopper to prevent excessive gas outflow.

Sectional drawing which shows an example of the gas stopper with which the protective cap for gas stoppers of 1st Embodiment was mounted | worn. The perspective view which shows the protective cap for gas stoppers of FIG. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 2nd Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 3rd Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 4th Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 5th Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 6th Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 7th Embodiment. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 8th Embodiment. The front view which shows the protective cap for gas stoppers of FIG. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 9th Embodiment. Sectional drawing which shows the state which the thin part elastically deformed in the protective cap for gas stoppers of FIG. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 10th Embodiment. FIG. 14 is a cross-sectional view showing the gas stopper protective cap of FIG. 13 in a state where the opening / closing member is located at the first position. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 11th Embodiment. FIG. 16 is a cross-sectional view showing the gas stopper protective cap of FIG. 15 in a state where the opening / closing member is located at the first position. The fragmentary sectional view which shows the state which mounted | wore the gas stopper with the protective cap for gas stoppers of 11th Embodiment. FIG. 18 is a cross-sectional view illustrating the gas stopper protective cap of FIG. 17 in a state where the opening / closing member is located at the first position.

  Hereinafter, various embodiments of a protective cap for a gas stopper according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, a gas plug 2 attached to supply a gas for fuel to a gas stove or the like includes a gas plug main body 6 provided with a supply passage 4 through which the fuel gas flows, and a base portion of the gas plug main body 6. An inflow side connection portion 8 is provided on the side, an outflow side connection portion 10 is provided at the distal end side thereof, and the feed channel 4 extends from the inflow side connection portion 8 to the outflow side connection portion 10. In such a gas plug 2, a gas pipe (not shown) connected to, for example, a gas burying pipe, a gas cylinder, or the like is provided at the inflow side connection portion 8 (upstream side portion 11 of the supply flow path 4). A gas hose (not shown) connected to a gas device such as a gas stove or a gas stove is connected to the connection portion 10 on the outflow side (outflow side portion 13 of the supply flow path 4).

  The gas plug 2 is provided with a valve mechanism 12 for opening and closing the supply flow path 4 and an overflow prevention mechanism 14 for preventing excessive gas outflow. The valve mechanism 12 includes a valve body 16 rotatably disposed in the supply flow path 4 of the gas plug main body 6, and a valve hole 18 is provided on a peripheral side surface of the valve body 16. Further, the valve mechanism 12 includes an operation member 20 attached to the upper end portion of the gas plug body 6, and the operation member 20 and the valve body 16 are connected via a connecting member 22.

  The overflow prevention mechanism 14 is accommodated in a valve holding member 24 disposed on the upstream side of the valve body 16 as viewed in the flow direction of the fuel gas, and is movably accommodated in the valve holding member 24 in the vertical direction. The valve holding member 24 is provided with a communication hole 28 at its upper end. The ball-shaped valve 26 is normally held at a lowered position indicated by a solid line in FIG. 1 due to its own weight. In this lowered position, the communication hole 28 is opened, and fuel gas can be fed through the communication hole 28. The Further, for example, when the fuel gas excessively flows out due to an erroneous opening operation, the ball valve 26 rises due to the flow, and the communication hole 28 of the valve holding member 24 is closed as shown by a one-dot chain line in FIG. The fuel gas supply is cut off through the communication hole.

  In such a gas plug 2, when the operation member 20 of the valve mechanism 12 is opened and positioned at the open position shown in FIG. 1, the valve hole 18 of the valve body 16 is connected to the outflow side portion 13 of the supply flow path 4. The fuel gas from the upstream side portion 11 of the supply passage 4 that is communicated flows in the valve holding member 24, flows in the valve body 16 through the communication hole 28, and further passes through the valve hole 18. To the downstream side 13 of the Further, when the operation member 20 is closed and positioned at a closed position (not shown), the valve hole 18 of the valve body 16 is disengaged from the downstream side portion 13 of the feed flow path 4 and the communication is released. The supply of fuel gas through the supply channel 4 is blocked.

  When a gas appliance such as a gas stove is not connected to the connection portion 10 on the outflow side of the gas plug 2, a gas cap protective cap 30 is attached to the connection portion 10 as shown in FIG. Referring to FIG. 1 and FIG. 2, the illustrated protective cap 30 includes a hollow cylindrical cap body 32, and the cap body 32 is detachably mounted so as to cover the connecting portion 10 on the outflow side of the gas stopper 2. Is done. An enlarged diameter portion 34 is integrally provided at the distal end portion of the cap body, and an end wall portion 36 is provided at an end portion of the enlarged diameter portion 34, and the end wall portion 36 is connected to the connection portion 10 of the gas plug 2. Located opposite the outlet 41. In addition, a pair of discharge holes 40 are provided in the peripheral side wall 38 of the enlarged diameter portion 34 at intervals in the circumferential direction (with an interval of 180 degrees in this embodiment). In FIG. 2, in order to clearly show the discharge hole 40, the protective cap 30 is shown rotated 90 degrees from the state shown in FIG. Such a protective cap 30 can be formed from, for example, a synthetic resin. One or more discharge holes 40 may be provided on the peripheral side wall 38 of the enlarged diameter portion 34.

  In this embodiment, an inner tapered surface 44 corresponding to the outer peripheral surface shape of the distal tapered portion 42 of the connecting portion 10 of the gas plug 2 is further provided on the distal end side (right side in FIG. 1) of the cap body 32, and this inner tapered surface. The surface 44 is formed so that the inner diameter gradually decreases toward the end wall portion 36.

  As shown in FIG. 1, such a gas stopper protective cap 30 is mounted so as to be fitted to an unused outflow side connecting portion 10 of the gas stopper 2 (a connecting portion to which no gas hose is connected), When mounted in this manner, the inner tapered surface 44 of the protective cap 30 comes into contact with the outer peripheral surface of the tip tapered portion 42 of the connecting portion 10 and is held in the mounted state as shown in FIG. In such a mounted state, a discharge space 46 exists between the distal end portion of the connection portion 10 of the gas plug 2 and the end wall portion 36 of the protective cap 30, and the discharge space 46 is directed toward the discharge space 46 as described later. Fuel gas is released.

  In the mounted state, the protective cap 30 covers the connecting part 10 of the gas plug 2 and protects the connecting part 10 as well as adhesion of dust and the like to the connecting part 10 as is apparent from FIG. This prevents the connection 10 from being kept clean.

  If the operation member 20 of the valve mechanism 12 is accidentally opened in such a mounted state, the valve hole 18 of the valve body 16 is communicated with the outflow side portion 13 of the feed passage 4 as described above, The fuel gas from the upstream side portion 11 of the flow path 4 flows to the downstream side portion 13 of the feed flow path 4 through the communication hole 28 of the valve holding member 24 and the valve hole 18 of the valve body 16, and The gas is discharged from the outlet 41 to the discharge space 46 and further released to the atmosphere through the discharge hole 40 of the protective cap 30.

  The amount of fuel gas released at this time is large enough to activate the overflow prevention mechanism 14. When the fuel gas flows through the feed channel 4 of the gas plug 2 in this way, the fuel flowing through the feed channel 4 Due to the gas pressure of the working gas, the ball-shaped valve 26 of the overflow prevention mechanism 14 rises to close the communication hole 28 of the valve holding member 24, and the closed state by the ball-shaped valve 26 is maintained, so that the fuel gas overflows. Is reliably prevented. Thus, when the operation member 20 of the valve mechanism 12 is erroneously opened, the outflow of the fuel gas is blocked by the overflow prevention mechanism 14, so that the outflow can be reliably prevented and the conventionally generated fuel There will be no spillage of industrial gas.

  Next, a gas stopper protective cap according to a second embodiment will be described with reference to FIG. In the following embodiments, substantially the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 3, in the second embodiment, the cap body 32A of the protective cap 30A for the gas stopper extends to the distal end side (right side in FIG. 3) with the same outer diameter, and the distal end of the cap stopper 32A on the outflow side of the gas stopper 2 The end wall portion 36A is integrally provided so as to face the connection portion 10, and the enlarged diameter portion in the first embodiment is omitted.

  Similarly to the above, this protective cap 30A is also detachably mounted so that the hollow cylindrical cap body 32A covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36A of the protective cap 30A. In relation to the discharge space 46, a discharge hole 40 is provided at the tip of the cap body 32A. For example, two discharge holes 40 are provided at intervals in the circumferential direction as in the first embodiment. The discharge hole 40 communicates the discharge space 46 with the atmosphere. Other configurations of the second embodiment are substantially the same as those of the first embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30A of the second embodiment is substantially the same as that of the first embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. Further, when the operating member is erroneously opened, the fuel gas that has flowed through the feed passage 4 of the gas plug 2 is released into the discharge space 46 and further released into the atmosphere through the discharge hole 40 of the protective cap 30A. The excessive outflow of the fuel gas causes the excessive outflow prevention mechanism to be in a closed state (a state where the ball-shaped valve closes the communication hole of the valve holding member), and the overflow of the fuel gas is reliably prevented in the same manner as described above. .

  Next, a protective cap for a gas stopper according to a third embodiment will be described with reference to FIG. In the third embodiment, the tip of the gas cap protective cap of the second embodiment is modified.

  In FIG. 4, in the third embodiment, the cap body 32B of the gas stopper protective cap 30B extends to the distal end side with the same outer diameter and faces the connecting portion 10 on the outflow side of the gas stopper 2 at the distal end portion. Thus, the end wall portion 36B is integrally provided, and the discharge hole 40B is provided in the end wall portion 36B.

  Similarly to the above, this protective cap 30B is also detachably mounted so that the hollow cylindrical cap body 32B covers the connecting portion 10 on the outflow side of the gas plug 2, and in this state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36B of the protective cap 30B. In this embodiment, in addition to the discharge space 46, the end wall portion 36 B of the cap body 32 B is provided with a protruding wall 52 that protrudes in an L shape inwardly from the discharge space 46. Is located inside the discharge hole 40B of the end wall portion 36B with a space therebetween, and defines a discharge flow channel 54 therebetween. Other configurations of the third embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30B of the third embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, since the protruding wall 52 is positioned inside the discharge hole 40B of the end wall portion 36B, entry of dust and the like through the discharge hole 40B is prevented, and adhesion of dust and the like to the connection portion 10 is more effectively prevented. be able to. Further, when the operation member is erroneously opened, the fuel gas that has flowed through the feed flow path 4 of the gas plug 2 is released into the discharge space 46, and further to the atmosphere through the discharge flow path 54 and the discharge hole 40B of the protective cap 30B. The excessive outflow of the fuel gas is released, so that the overflow prevention mechanism is closed, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, with reference to FIG. 5, the protective cap for gas stoppers of 4th Embodiment is demonstrated. In the fourth embodiment, the tip of the gas stopper protective cap of the second embodiment is modified.

  In FIG. 5, in the fourth embodiment, the distal end portion of the cap body 32C of the gas stopper protective cap 30C is somewhat tapered, and the distal end portion faces the connecting portion 10 on the outflow side of the gas stopper 2. Thus, an end wall portion 36C is provided, and a discharge hole 40C is provided in the end wall portion 36C.

  Similarly to the above, the protective cap 30C is also detachably mounted so that the hollow cylindrical cap body 32C covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36C of the protective cap 30C. Other configurations of the fourth embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30C of the fourth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. Further, when the operating member is erroneously opened, the fuel gas that has flowed through the feed passage 4 of the gas plug 2 is released into the discharge space 46 and further released into the atmosphere through the discharge hole 40C of the protective cap 30C. Due to the excessive outflow of the fuel gas, the excessive outflow prevention mechanism is closed, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, a gas stopper protective cap according to a fifth embodiment will be described with reference to FIG. In the fifth embodiment, the tip of the gas cap protective cap of the first embodiment is modified.

  In FIG. 6, in the fifth embodiment, an enlarged diameter portion 34D is provided at the distal end portion (the right end portion in FIG. 6) of the cap body 32D of the gas stopper protective cap 30D, and this enlarged diameter portion 34D is at the distal end. An end wall portion 36D is provided at the tip of the enlarged diameter portion 34D so as to face the connecting portion 10 on the outflow side of the gas stopper 2. In addition, a pair of discharge holes 40D are provided in the inner annular wall portion 62 (annular wall portion extending radially outward from the cap body 32D) of the enlarged diameter portion 36D at intervals in the circumferential direction.

  Similarly to the above, this protective cap 30D is also detachably mounted so that the hollow cylindrical cap body 32D covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36D of the protective cap 30D. Other configurations of the fifth embodiment are substantially the same as those of the first embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30D of the fifth embodiment is substantially the same as that of the first embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, since the discharge hole 40D is provided in the inner annular wall 62 of the enlarged diameter portion 34D of the protective cap 30D, the fuel gas is discharged from the discharge hole 40D toward the gas plug 2 as will be described later. Therefore, the amount of gas gas 2 flowing to the operator side is reduced, and safety can be ensured. Further, when the operating member is erroneously opened, the fuel gas flowing through the feed passage 4 of the gas plug 2 is discharged into the discharge space 46 and further toward the gas plug 2 through the discharge hole 40D of the protective cap 30D. Due to the excessive outflow of the fuel gas released into the atmosphere, the excessive outflow prevention mechanism is closed, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, a protective cap for a gas stopper according to a sixth embodiment will be described with reference to FIG. In the sixth embodiment, the tip of the gas stopper protective cap of the second embodiment is modified.

  In FIG. 7, in the sixth embodiment, the cap body 32E of the gas stopper protective cap 30E extends to the distal end side with the same outer diameter, and faces the connecting portion 10 on the outflow side of the gas stopper 2 at the distal end portion. Thus, the end wall portion 36E is integrally provided, and the end wall portion 36E is provided with a discharge hole 40E. In this embodiment, a selectively permeable member 72 is further attached to the discharge hole 40E. The selectively permeable member 72 transmits a fuel gas such as a fuel gas, but blocks a liquid such as water. As such a selectively permeable member, it can be comprised from the porous body which has the continuous pore shape | molded, for example using thermoplastic resin powders, such as polyethylene, a polypropylene, and a polystyrene.

  Similarly to the above, this protective cap 30E is also detachably mounted so that the hollow cylindrical cap body 32E covers the connecting portion 10 on the outflow side of the gas plug 2, and in this state, the gas plug The discharge space 46 exists between the distal end portion of the second connecting portion 10 and the end wall portion 36E (specifically, the selectively permeable member 72) of the protective cap 30E. Other configurations of the sixth embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30E of the sixth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, since the selectively permeable member 72 is mounted in the discharge hole 40E of the cap body 32E, entry of the dust into the discharge space 46 can be reliably prevented, and the connecting portion 10 of the gas plug 2 can be connected. It can be kept clean. In addition, when the operation member is erroneously opened, the fuel gas that has flowed through the feed passage 4 of the gas plug 2 is discharged into the discharge space 46 and is further attached to the discharge hole 40E of the protective cap 30E. The fuel gas is discharged into the atmosphere through 72, and the excessive outflow of the fuel gas causes the excessive outflow prevention mechanism to be in a closed state, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  In addition, you may make it provide such a selectively permeable member in the discharge | release hole of the cap main body in the protective cap of 1st-5th embodiment.

  Next, a protective cap for a gas stopper according to a seventh embodiment will be described with reference to FIG. In the seventh embodiment, the tip of the gas stopper protective cap of the second embodiment is modified.

  In FIG. 8, in the seventh embodiment, the cap body 32F of the protective cap for gas plug 30F extends to the distal end side with the same outer diameter, and the distal end portion is connected to the connecting portion 10 on the outflow side of the gas plug 2. An end wall portion 36F is provided so as to oppose, and the end wall portion 36F is configured to open and close the discharge hole 40F provided at the tip of the cap body 32F.

  More specifically, a part of the end wall portion 36F (the upper end portion in this embodiment) is integrally connected to the cap body 32F via the thin portion 82, and the thin portion 82 is configured to be elastically deformable. ing. The end wall portion 36F is normally located at a closed position shown by a solid line in FIG. 8 to close the discharge hole 40F. When the fuel gas flows through the discharge space 46 as will be described later, the thin wall portion 82 is caused by the pressure. Is opened as indicated by a two-dot chain line, and is released to the outside through the opened discharge hole 40F as indicated by an arrow 84 of a two-dot chain line.

  Similarly to the above, this protective cap 30F is also detachably mounted so that the hollow cylindrical cap body 32F covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the tip of the second connecting portion 10 and the end wall portion 36F of the protective cap 30F. Other configurations of the seventh embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30F of the seventh embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, since the discharge hole 40F of the cap body 32F is configured to be opened and closed by the end wall portion 36F, it is possible to prevent entry of dust or the like into the discharge space 46, and the connection portion 10 of the gas plug 2 can be prevented. Can be kept clean. Further, when the operating member is erroneously opened, the fuel gas flowing through the feed passage 4 of the gas plug 2 is discharged into the discharge space 46, and the gas pressure of the released fuel gas causes the cap main body 32F to The end wall 36F rotates as indicated by a two-dot chain line to open the discharge hole 40F, and is released to the atmosphere through the open discharge hole 40F. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, with reference to FIG.9 and FIG.10, the protective cap for gas stoppers of 8th Embodiment is demonstrated. In the eighth embodiment, the tip of the gas cap protective cap of the second embodiment is modified.

  9 and 10, in the eighth embodiment, the cap main body 32G of the gas stopper protective cap 30G extends to the distal end portion with the same outer diameter, and the distal end portion is connected to the outflow side of the gas stopper 2. An end wall portion 36G is provided so as to face the portion 10. In this embodiment, the end wall portion 36G is formed in a conical shape and is tapered toward the tip. The end wall portion 36G is provided with a plurality of (in the illustrated form, eight) slits 92 radially, and a thin portion at the base portion of the end wall portion 36G (connecting portion with the cap body 32G). 94, and the thin wall portion 94 is configured to be elastically deformable. The end wall portion 36G is configured to open and close the discharge hole 40G provided at the tip of the cap body 32G. That is, this end wall portion 36G is normally located at the closed position shown in FIG. 9 by a solid line and closes the discharge hole 40G, and when the fuel gas flows through the discharge space 46 as will be described later. By the pressure, the thin part 94 is opened as indicated by a two-dot chain line with the fulcrum 94 as a fulcrum, and is released to the outside through the opened discharge hole 40G as indicated by a two-dot chain line arrow 96. In this embodiment, the thin wall portion 94 is provided at the base portion of the end wall portion 36G. However, the thin wall portion is provided at the central portion of the end wall portion 94, and the central portion is elastically deformed to open the discharge hole 40G. Alternatively, the entire end wall portion 94 may be formed as a thin portion, and the entire end wall portion 94 may be elastically deformed to open the discharge hole 40G.

  Similarly to the above, this protective cap 30G is also detachably mounted so that the hollow cylindrical cap body 32G covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36G of the protective cap 30G. Other configurations of the seventh embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30G of the eighth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, since the discharge hole 40G of the cap body 32G is configured to be opened and closed by the end wall portion 36G, it is possible to prevent entry of dust and the like into the discharge space 46. Further, when the operating member is erroneously opened, the fuel gas flowing through the feed passage 4 of the gas plug 2 is released into the discharge space 46, and the gas pressure of the released fuel gas causes the cap main body 32G to The end wall 36G rotates as indicated by a two-dot chain line to open the discharge hole 40G, and is released to the atmosphere through the open discharge hole 40G. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, a gas stopper protective cap according to a ninth embodiment will be described with reference to FIGS. 11 and 12. In the ninth embodiment, the tip of the gas cap protective cap of the second embodiment is modified.

  11 and 12, in the ninth embodiment, the cap main body 32H of the gas stopper protective cap 30H extends to the distal end portion with the same outer diameter, and the distal end portion is interposed through the cylindrical thin portion 102. An end wall portion 36H is provided, and the end wall portion 36H is provided so as to face the connecting portion 10 on the outflow side of the gas plug 2. In this embodiment, the cylindrical thin portion 102 is bent into a valley shape so as to be elastically deformable, and a discharge hole 40H is provided in the bent valley portion. Such a cylindrical thin-walled portion 102 is usually kept in a bent valley shape as shown in FIG. 11, and in such a valley shape, the discharge hole 40H is in a closed state, and the fuel gas When the gas flows through the discharge space 46 as will be described later, the cylindrical thin wall portion 102 is expanded as shown in FIG. 12 due to the pressure. In such an extended state, the discharge hole 40H is in an open state, and the release hole in the open state. Released to the outside through 40H. In this embodiment, the cylindrical thin portion 102 and the end wall portion 36A are formed in a thin shape, but the above-described effects are achieved by forming only the cylindrical thin portion 102 in a thin shape.

  Similarly to the above, this protective cap 30H is also detachably mounted so that the hollow cylindrical cap body 32H covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36H of the protective cap 30H. Other configurations of the ninth embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30G of the ninth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, in the normal state, the cylindrical thin portion 102 of the cap body 32H is held in a valley shape and the discharge hole 40H is held in a closed state, thereby preventing entry of dust or the like into the discharge space 46. be able to. Further, when the operating member is erroneously opened, the fuel gas flowing through the feed passage 4 of the gas plug 2 is released into the discharge space 46, and the gas pressure of the released fuel gas causes the cap main body 32H to The cylindrical thin-walled portion 102 expands into an expanded state, and the discharge hole 40H is opened, and is released to the atmosphere through the opened discharge hole 40H. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, with reference to FIG.13 and FIG.14, the protective cap for gas stoppers of 10th Embodiment is demonstrated. In the tenth embodiment, the distal end side of the gas stopper protective cap of the second embodiment is modified.

  13 and 14, in the tenth embodiment, the cap body 32I of the gas stopper protective cap 30I extends to the distal end portion with the same outer diameter, and the end wall portion of the cap body 32I is formed at the distal end portion. An end wall member 112 is attached and fixed, and the end wall member 112 is disposed so as to face the connecting portion 10 on the outflow side of the gas plug 2. In this embodiment, a pair of discharge holes 40I are provided at the distal end portion of the cap body 32I at intervals in the circumferential direction. An opening / closing member 114 is disposed in the discharge space 46, and the opening / closing member 114 is configured to be movable between a first position shown in FIG. 14 and a second position shown in FIG.

  More specifically, an annular protrusion 116 extending toward the end wall member 102 toward the radially inner side is provided on the inner peripheral surface of the cap body 32I, and the communication opening 117 is defined by the annular protrusion 116. . Further, an elastic support protrusion 118 extending inward (leftward in FIGS. 13 and 4) is integrally provided on the inner surface of the end wall member 112, and an opening / closing member 114 is provided at the tip of the elastic support protrusion 118. It is attached. The elastic support protrusion 118 is configured to be elastically deformable in, for example, a substantially hemispherical shape, and is normally maintained at the second position shown in FIG. 13. It contacts or abuts against the protrusion 116 and blocks communication between the discharge space 46 and the discharge hole 40I of the cap body 32I. Further, when the fuel gas flows through the discharge space 46 as will be described later, the elastic support protrusion 118 of the end wall member 118 is elastically contracted by the pressure as shown in FIG. The opening / closing member 114 is spaced apart from the annular protrusion 116 of the cap body 32I and is positioned at the first position, whereby the discharge space 46 and the discharge hole 40I of the cap body 32I communicate with each other.

  Similarly to the above, this protective cap 30I is also detachably mounted so that the hollow cylindrical cap body 32I covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connecting portion 10 and the end wall member 102 of the protective cap 30I (functioning as the end wall portion of the cap body 32I). Other configurations of the tenth embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30I of the tenth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, in the normal state, the elastic support protrusion 118 of the end wall member 102 holds the opening / closing member 114 in the second position and is held in contact with or in contact with the annular protrusion 116 of the cap body 32I. It is possible to prevent entry of dust or the like into the discharge space 46. Further, when the operating member is erroneously opened, the fuel gas that has flowed through the feed passage 4 of the gas plug 2 is released into the discharge space 46, and the gas pressure of the released fuel gas is shown in FIG. As described above, the elastic support protrusion 118 of the end wall member 102 contracts and the opening / closing member 114 moves away from the annular protrusion 116 of the cap body 32I to the first position, thereby opening the communication opening 117. The air is released to the atmosphere through the open communication opening 117 and the discharge hole 40I of the cap body 32I. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, with reference to FIG. 15 and FIG. 16, a protective cap for a gas stopper according to an eleventh embodiment will be described. Also in the eleventh embodiment, a correction is made on the distal end side of the protective cap for a gas stopper of the second embodiment.

  15 and 16, in the eleventh embodiment, the cap main body 32J of the protective cap for gas plug 30J extends to the front end portion with the same outer diameter, and the end wall portion of the cap main body 32J is formed at the front end portion. An end wall member 122 is attached and fixed, and the end wall member 122 is disposed so as to face the connecting portion 10 on the outflow side of the gas plug 2. In this embodiment, a pair of discharge holes 40J are further provided at the distal end portion of the cap body 32J at intervals in the circumferential direction. An opening / closing member 124 is disposed in the discharge space 46, and the opening / closing member 124 is configured to be movable between a first position shown in FIG. 16 and a second position shown in FIG.

  More specifically, an accommodation large inner diameter portion 126 is provided on the inner peripheral surface of the distal end portion of the cap body 32J, and an annular shoulder portion 128 is provided by providing the accommodation large inner diameter portion 126, and the annular shoulder portion 128 provides a communication opening. 130 is defined. Further, the opening / closing member 124 is accommodated in the accommodating large inner diameter portion 126 of the cap body 32J so as to be movable in the axial direction (left and right direction in FIGS. 15 and 16), and between the opening / closing member 124 and the end wall member 122, there is a bias. A coil spring 132 as a means is interposed. The coil spring 132 elastically biases the opening / closing member 124 toward the connecting portion 10 of the gas plug 2, and the opening / closing member 124 is maintained at the second position shown in FIG. 15 by the action of the coil spring 132. In the second position, the opening / closing member 124 abuts against the shoulder 128 of the cap body 32J, closes the communication opening 130 of the cap body 32J at the tip, and closes the pair of discharge holes 40J by the peripheral side surface. To do. Further, when the fuel gas flows through the discharge space 46 as will be described later, as shown in FIG. 16, the coil spring 132 is contracted by the pressure and the opening / closing member 124 is separated from the shoulder portion of the cap body 32J. As a result, the communication opening 130 of the cap body 32J is opened and the discharge hole 40J of the cap body 32J is opened.

  Similarly to the above, this protective cap 30J is also detachably attached so that the hollow cylindrical cap body 32J covers the connecting portion 10 on the outflow side of the gas stopper 2, and in this state, the gas stopper The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall member 122 of the protective cap 30J (functioning as the end wall portion of the cap body 32J). Other configurations of the eleventh embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30J of the eleventh embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, in the normal state, the opening / closing member 124 positioned at the second position closes the communication opening 130 and the pair of discharge holes 40J of the cap body 32J, so that entry of dust and the like into the discharge space 46 is ensured. Can be prevented. Further, when the operating member is erroneously opened, the fuel gas flowing through the feed passage 4 of the gas plug 2 is released into the discharge space 46, and the gas pressure of the released fuel gas is shown in FIG. Thus, the coil spring 132 contracts and the opening / closing member 124 moves away from the shoulder 128 of the cap body 32J to the first position, thereby opening the communication opening 130 and the pair of discharge holes 40J of the cap body 32J. And is released to the atmosphere through the open communication opening 130 and the release hole 40J. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  Next, with reference to FIG.17 and FIG.18, the protective cap for gas stoppers of 12th Embodiment is demonstrated. Also in the twelfth embodiment, the distal end side of the gas stopper protective cap of the second embodiment is modified.

  17 and 18, in the twelfth embodiment, the cap main body 32K of the protective cap for gas plug 30K extends to the distal end portion with the same outer diameter, and the connecting portion 10 on the outflow side of the gas plug 2 is connected to the distal end portion. An end wall portion 36K is provided so as to face the surface. In this embodiment, the discharge hole 40K is further provided in the end wall portion 36K of the cap body 32K, and the opening / closing member 152 is provided between the first position shown in FIG. 18 and the second position shown in FIG. It is arrange | positioned so that movement is possible.

  More specifically, the opening / closing member 152 has a shaft portion 154 movably mounted in the discharge hole 40K of the end wall portion 36K, and one end portion of this shaft portion 154 (the right end portion in FIGS. 17 and 18). An opening / closing portion 156 is provided on the end wall portion 36K that protrudes outward from the end wall portion 36K, and a spring receiver is provided on the other end portion (the left end portion in FIGS. 17 and 18 and the end portion protruding into the discharge space 46). A portion 158 is provided, and a coil spring 160 as a biasing means is interposed between the spring receiving portion 158 and the end wall portion 36K of the cap body 32K. The coil spring 160 elastically biases the opening / closing member 152 toward the connecting portion 10 of the gas plug 2, and the opening / closing member 152 is held at the second position shown in FIG. 17 by the action of the coil spring 160. In the second position, the opening / closing portion 156 of the opening / closing member 152 abuts on the end wall portion 36K of the cap body 32K to close the discharge hole 40K. When the fuel gas flows through the discharge space 46 as will be described later, as shown in FIG. 18, the coil spring 160 contracts due to the pressure, and the opening / closing member 152 moves outward to the first position, and the cap body. It leaves | separates from the end wall part 36K of 32K, and, thereby, the discharge hole 40K of the cap main body 32K is open | released.

  Similarly to the above, this protective cap 30K is also detachably mounted so that the hollow cylindrical cap body 32K covers the connecting portion 10 on the outflow side of the gas plug 2, and in this mounted state, the gas plug The discharge space 46 exists between the distal end portion of the second connection portion 10 and the end wall portion 36K of the protective cap 30K. Other configurations of the twelfth embodiment are substantially the same as those of the second embodiment described above.

  Since the basic configuration of the gas stopper protective cap 30K according to the twelfth embodiment is substantially the same as that of the second embodiment, the connecting portion 10 of the gas stopper 2 is provided in the same manner as described above. Can be protected. In addition, in the normal state, the opening / closing portion 156 of the opening / closing member 152 located at the second position closes the discharge hole 40K of the cap body 32K, so that entry of dust and the like into the discharge space 46 is reliably prevented. be able to. Further, when the operating member is erroneously opened, the fuel gas that has flowed through the feed passage 4 of the gas plug 2 is discharged into the discharge space 46, and the gas pressure of the released fuel gas is shown in FIG. Thus, the coil spring 160 contracts and the opening / closing member 152 moves away from the end wall portion 36K of the cap body 32K to the first position, whereby the discharge hole 40K of the cap body 32K is opened and opened. It is discharged to the atmosphere through the discharge hole 40K. Therefore, even in this case, the excessive outflow of the fuel gas is blocked by the excessive outflow of the fuel gas, and the excessive outflow of the fuel gas is reliably prevented in the same manner as described above.

  As mentioned above, although various embodiment of the protective cap for gas stoppers according to this invention was described, this invention is not limited to these embodiment, A various deformation | transformation thru | or correction | amendment are possible without deviating from the scope of the present invention.

2 Gas stopper 4 Supply flow path 6 Gas stopper body 8, 10 Connection portion 12 Valve mechanism 14 Overflow prevention mechanism 30, 30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H, 30I, 30J, 30K Gas stopper Protective cap 32, 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H, 32I, 32J, 32K Cap body 36, 36A, 36B, 36C, 36D, 36E, 36F, 36G, 36H, 36K End wall 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I, 40J, 40K Release hole 46 Release space

Claims (5)

A protective cap for a gas stopper to be attached to a connecting portion of a gas stopper having a built-in mechanism for preventing excessive gas outflow,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space is present between the connection portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged to the discharge space to the outside. A protective cap for a gas stopper, characterized by   2. The protective cap for a gas plug according to claim 1, wherein the discharge hole is provided with a selectively permeable member that allows permeation of fuel gas and blocks liquid permeation. A protective cap for a gas stopper to be attached to a connecting portion of a gas stopper having a built-in mechanism for preventing excessive gas outflow,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space exists between the portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the gas released into the discharge space to the outside. In addition, a protective cap for a gas stopper, wherein a thin wall portion that can be elastically deformed is provided at a part thereof, and the discharge hole is opened and closed by elastic deformation of the thin wall portion. A protective cap for a gas stopper to be attached to a connecting portion of a gas stopper having a built-in mechanism for preventing excessive gas outflow,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space is present between the connection portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged to the discharge space to the outside. And an opening / closing member is disposed so as to be movable between a first position and a second position in the discharge space, and when the opening / closing member is in the first position, the discharge A protective cap for a gas stopper, wherein the space and the discharge hole are communicated, and the communication between the discharge space and the discharge hole is blocked when the opening / closing member is in the second position. A protective cap for a gas stopper to be attached to a connecting portion of a gas stopper having a built-in mechanism for preventing excessive gas outflow,
A cap body mounted to cover the connection portion, the cap body having an end wall portion facing the connection portion, and the end wall of the cap body in the state of being mounted on the connection portion; A discharge space exists between the first portion and the tip of the connection portion, and the cap body is further provided with a discharge hole for discharging the fuel gas discharged from the discharge space to the outside. In addition, an opening / closing member is disposed in the discharge hole so as to be movable between a first position and a second position. When the opening / closing member is in the first position, the opening / closing member opens the discharge hole. And when it exists in the said 2nd position, the said opening-and-closing member obstruct | occludes the said discharge hole, The protective cap for gas stoppers characterized by the above-mentioned.

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