JP5260202B2 - Gas socket - Google Patents

Description

  The present invention relates to a gas socket to which, for example, a plug of a quick coupling for gas specified in Japanese Industrial Standard is connected.

  Generally, as described in Non-Patent Document 1 below, a gas socket is provided so as to be movable between a socket body having a through hole and a standby position and a connection position in the through hole of the socket body. A connecting tube, an urging member that urges the connecting tube from the connection position toward the standby position, and an abutting member provided at the tip of the connecting tube. A contact surface is formed in an annular shape at the tip of the contact member in the urging direction.

  When the plug is inserted into the through hole, the tip end surface of the plug abuts against the contact surface of the contact member. When the plug is further inserted into the through hole in this state, the connection cylinder moves from the standby position toward the connection position against the urging force of the urging member. When the connecting cylinder reaches the connecting position, the plug is locked in the through hole. As a result, the inside of the plug communicates with the through hole via the connecting cylinder, and gas flows from the plug into the through hole.

Japanese Industrial Standard Quick Joint for Gas Equipment (JIS S 2135)

  In the conventional gas socket, the contact member is made of an elastic material such as rubber in order to improve the airtightness between the contact surfaces of the tip end surface and the contact surface when the plug is connected. However, elastic materials such as rubber may deteriorate early due to high temperatures, chemical substances such as detergents and seasonings, changes in temperature and humidity. When the contact member deteriorates, there is a problem that the airtightness between the contact surfaces of the contact member and the plug is lowered, and as a result, the airtightness between the plug and the connecting tube is lowered.

In order to solve the above problem, the present invention includes a socket body having a through hole into which a plug is inserted from one end opening, a standby position in the through hole, and the other end of the through hole with respect to the standby position. A connecting tube that is movable between the connection positions spaced apart from each other, a biasing member that biases the connection tube from the connection position toward the standby position, and an elastic material such as rubber. And a contact member provided at the tip of the connecting tube in the biasing direction of the biasing member, and the tip of the contact member in the biasing direction of the biasing member includes In a gas socket in which an abutting surface that presses in an annular shape is formed on the distal end surface of a plug inserted into a through hole, at least the distal end portion of the connecting tube is made of a material that is more resistant to deterioration than the abutting member. Material with excellent deterioration resistance Has been at the distal end of the connecting tube constituted by a second contact surface for pressing contact with the annular are formed on the front end surface of the plug at least when the connection tube is positioned at the connection position, the plug After the contact member is elastically deformed by pressing and contacting the contact surface, the second contact surface is pressed and contacted with the plug, and the second contact surface is formed in a tapered shape. It is characterized by being in press contact with the intersection between the tip surface and the inner peripheral surface of the plug .
In this case, the abutting tube portion is resiliently expandable and contractible diameter at the tip portion of the upper Symbol connecting tube is formed, it is desirable that the outer peripheral surface of the abutting tube portion said second abutment surface is formed .

According to the present invention having the above-described characteristic configuration, the distal end surface of the plug contacts not only the abutting surface of the abutting member but also the second abutting surface formed on the distal end surface of the connecting cylinder. And the front-end | tip part of a connection cylinder is comprised with the material excellent in deterioration resistance rather than the contact member. Therefore, even if the contact member deteriorates and the airtightness between the plug and the contact surface decreases, the airtightness between the tip end surface of the plug and the second contact surface does not decrease. Therefore, it can prevent that the airtightness between a plug and a connection cylinder falls.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 and 2 show an embodiment of the present invention . The gas socket 1 of this embodiment is for supplying the gas sent from the plug P to a gas device (not shown), and includes a socket body 2, a connecting cylinder 3, an abutting member 4, and a first coil. The spring (biasing member) 5, the operation cylinder 6, and the second coil spring 7 are the main components.

  The socket body 2 is formed with a through-hole 2a penetrating from one end face (right end face; hereinafter, left and right mean left and right in the drawings) to the other end face. The through hole 2a has a mounting hole 2b and a mounting hole 2c. The mounting hole 2b extends to the left from the right end surface of the socket body 2, and the left end is closed by the bottom 2d. The mounting hole 2c has a right end communicating with the left end of the mounting hole 2b, and a left end penetrating the bottom 2d and opening on the outer surface of the socket body 2. The attachment hole 2c is rotatably provided with a right end portion of the connection pipe 8 bent in a “<” shape. A gas appliance is connected to the left end protruding from the attachment hole 2c of the connection pipe 8 via a gas pipe (not shown) such as a rubber pipe.

  Inside the mounting hole 2b, the connecting cylinder 3 is inserted so as to be movable in the axial direction of the mounting hole 2b in a state where the axis of the connecting cylinder 3 coincides with the axis of the mounting hole 2b. An annular projecting portion 3 a is formed on the outer peripheral surface of the left end portion of the connecting tube 3. The annular protrusion 3a is slidably fitted to the inner peripheral surface of the mounting hole 2b. Further, the inner peripheral surface of the left end portion of the connection tube 3 is slidably fitted to the inner tube portion 2e formed on the bottom portion 2c. A space between the outer peripheral surface of the inner cylinder portion 2 e and the inner peripheral surface of the connection cylinder 3 is hermetically sealed by a seal member 9. On the other hand, the holding cylinder 10 is fitted and fixed to the outer peripheral surface of the right end portion of the connection cylinder 3. The holding cylinder 10 is slidably fitted in the mounting hole 2b. In this way, the connecting cylinder 3 is provided so as to be movable in the axial direction of the mounting hole 2b. The holding cylinder 10 may be formed integrally with the connection cylinder 3.

  The connecting cylinder 3 is movable between the standby position shown in FIG. 1 and the connecting position shown in FIG. 2, and the first coil spring 5 arranged between the left end surface of the connecting cylinder 3 and the bottom 2d It is urged to the right from the connection position toward the standby position. The connecting tube 3 biased to the right cannot move any further to the right and stops when the annular protrusion 3a hits the engaging protrusion 2f formed on the inner peripheral surface of the mounting hole 2b. . The position of the connecting cylinder 3 at this time is the standby position.

  A ring-shaped contact member 4 is sandwiched and fixed between the outer peripheral surface of the right end portion of the connection tube 3 and the inner peripheral surface of the right end portion of the holding tube 10. The contact member 4 is made of an elastic material. As a material having elasticity, a relatively hard rubber is usually employed. The contact member 4 hermetically seals between the inner peripheral surface of the connection tube 3 and the outer peripheral surface of the holding tube 10. A contact surface 4 a is formed at the intersection of the right end surface (tip surface) and the inner peripheral surface of the contact member 4. The contact surface 4a extends in an annular shape around the axis of the connection cylinder 3, and the cross-sectional shape is a quarter arc. The contact surface 4a may be a tapered surface having a taper angle substantially the same as a tapered surface Pb of the plug P described later.

  In the right end portion of the peripheral wall portion of the socket body 2, a plurality of accommodation holes 2 g penetrating the peripheral wall portion in the radial direction of the mounting hole 2 b are formed. The accommodation holes 2g are arranged at equal intervals in the circumferential direction of the mounting hole 2b. The engaging member 11 is accommodated in the accommodation hole 2g. The engaging member 11 is made of a sphere, and its outer diameter is set to be substantially the same as the inner diameter of the accommodation hole 2g. Therefore, the engaging member 11 cannot move in the left-right direction and the circumferential direction, but can move in the longitudinal direction of the accommodation hole 2g, that is, in the radial direction of the mounting hole 2b. Moreover, the outer diameter of the engaging member 11 is set larger than the length of the accommodation hole 2g. Therefore, when the inner edge of the engagement member 11 is positioned on the inner peripheral surface of the mounting hole 2 b, the outer end of the engagement member 11 protrudes outward from the outer peripheral surface of the socket body 2. Conversely, when the outer edge of the engaging member 11 is positioned on the outer peripheral surface of the socket body 2, the inner end of the engaging member 11 protrudes inward from the inner peripheral surface of the mounting hole 2b.

  As shown in FIG. 1, when the connection cylinder 3 is located at the standby position, the outer peripheral surface of the holding cylinder 10 contacts the inner edge of the engagement member 11, and the end edge is connected to the inner periphery of the mounting hole 2b. It is located on the surface. Thereby, the outer end of the engaging member 11 is projected outward from the outer peripheral surface of the socket body 2. On the other hand, when the connection cylinder 3 moves to the connection position, the holding cylinder 11 is separated from the accommodation hole 2 to the left, and the engagement member 11 can protrude inward from the accommodation hole 2g. However, since the inner diameter of the inner end of the accommodation hole 2g is smaller than the outer diameter of the engagement member 11, the engagement member 11 does not slip out from the accommodation hole 2g.

  The left end portion of the cylindrical cover 12 is fitted and fixed to the outer peripheral surface of the left end portion of the socket body 2. The cover 12 may be formed integrally with the socket body 2. The inner diameter of the right end portion of the cover 12 is larger than the outer diameter of the socket body 2, and an annular gap S is formed between the inner peripheral surface of the right end portion of the cover 12 and the outer peripheral surface of the socket body 2. ing.

  On the outer peripheral surface of the right end portion of the socket body 2, the operation cylinder 6 moves between the release position shown in FIG. 1 and the engagement position shown in FIG. 2 in the axial direction of the socket body 2 (= the axial direction of the mounting hole 2 b). It can be fitted. The left end portion of the operation tube 6 is inserted into the gap S, and a second coil spring 7 is provided between the left end surface of the operation tube 6 and the cover 12. The operation cylinder 6 is urged from the release position toward the engagement position by the second coil spring 7.

  A tapered engagement surface 6 a is formed on the inner peripheral surface of the operation cylinder 6. When the engaging surface 6a hits the outer end of the engaging member 11 protruding outward from the receiving hole 2g, it cannot move further to the engaging position side (right side). The position of the operation cylinder 6 at this time is a release position. Therefore, the operation cylinder 6 is located at the release position when the connection cylinder 3 is located at the standby position. On the other hand, when the connection cylinder 3 moves to the connection position, the engagement member 11 can move inward, and the engagement surface 6 a moves the engagement member 11 inward by the urging force of the second coil spring 7. Of course, at the same time, the operation cylinder 6 moves to the right side toward the engagement position. When the operation tube 6 moves to the right by a predetermined distance from the release position, the engagement surface 6a hits the large diameter portion 2h formed on the outer peripheral surface of the right end portion of the socket body 2 and stops. The position of the operation cylinder 6 at this time is the engagement position. When the operation cylinder 6 is located at the engagement position, the inner peripheral surface of the left end portion of the operation cylinder 6 abuts on the outer edge of the engagement member 11, and the outer edge is positioned on the outer peripheral surface of the socket body 2. I am letting. As a result, the inner end of the engaging member 11 protrudes inward from the inner peripheral surface of the mounting hole 2b.

  The plug P connected to the socket 1 will be described. The plug P has an insertion cylinder portion Pa having a straight cylindrical shape. The insertion cylinder portion Pa has an outer diameter substantially the same as the inner diameter of the mounting hole 2b, and can be inserted into and removed from the right end opening of the mounting hole 2b. A tapered surface Pb that is tapered is formed on the distal end surface of the insertion cylinder portion Pa. When the insertion cylinder portion Pa is inserted into the mounting hole 2b up to a predetermined position, the tapered surface Pb presses and contacts the contact surface 4a in an annular shape. Thereby, the inside of the plug P communicates with the inside of the connecting tube 3 in an airtight state with respect to the outside. When the insertion cylinder part Pa is further inserted into the mounting hole 2b in a state where the taper surface Pb abuts against the contact surface 4a, the connection cylinder 3 moves from the standby position to the connection position against the urging force of the first coil spring 5. It is moved toward.

  An engaging recess Pc is formed on the outer peripheral surface of the insertion cylinder portion Pa. The engaging recess Pc extends annularly along the outer peripheral surface of the insertion cylinder portion Pa, and is formed in a trapezoidal cross section. The engaging recess Pc is disposed so as to face the engaging member 11 when the insertion tube portion Pa is inserted into the mounting hole 2b until the connection tube 3 reaches the connection position. Therefore, when the insertion cylinder part Pa is inserted into the mounting hole 2b until the connection cylinder 3 reaches the connection position, the inner end of the engagement member 11 enters the engagement recess Pc and abuts on both side surfaces of the engagement recess Pc. . Moreover, in this state, the operation cylinder 6 is located at the engagement position, and the engagement member 11 is prevented from moving outward. Therefore, the insertion cylinder portion Pa is locked in the mounting hole 2 b so as not to be escaped, and the plug P is connected to the socket 1. In a state where the plug P is connected to the socket 1, the rod 2i formed on the bottom 2d of the socket body 2 enters the plug P and closes a valve body (not shown) provided inside the plug P. Move from position to open position. As a result, the gas in the plug P flows into the inner cylinder portion 2e through the connection cylinder 3, and is further supplied to the gas equipment through the connection pipe 8 and the gas pipe. When the operation tube 6 is moved from the engagement position to the release position in a state where the plug P is connected to the socket 1, the engagement member 11 can be moved outward. Therefore, the insertion cylinder portion Pa can be extracted from the mounting hole 2b, and the plug P can be removed from the socket 1. When the plug P is removed from the socket 1, the valve body provided in the plug P moves from the open position to the closed position, and the inside of the plug P is closed.

  The abutting member 4 is made of rubber and easily deteriorates due to a high temperature, a chemical substance such as a detergent or a seasoning, or a long time. When the contact member 4 deteriorates and hardens, the airtightness between the contact surface 4a and the tapered surface Pb decreases, and the airtightness between the connection tube 3 and the plug P decreases.

  In order to prevent the airtightness between the connecting tube 3 and the plug P from being lowered even if the contact member 4 is deteriorated, the following configuration is employed. That is, the connecting cylinder 3 is made of a material that is more resistant to deterioration than the contact member 4. Here, the term “degradation resistance” means resistance to resistance due to high temperatures, chemical substances such as detergents and seasonings, or changes in temperature and humidity, the passage of time, and others. In this embodiment, a resin such as metal or polyacetal is adopted as a material having excellent properties. The connecting tube 3 does not necessarily need to be composed entirely of a material having excellent deterioration resistance, and only the right end portion (tip portion) where a second contact surface 3c described later is formed has excellent deterioration resistance. You may comprise.

  An abutting tube portion 3b extending annularly about the axis of the connecting tube 3 is formed at the tip of the connecting tube 3, particularly at the intersection between the tip surface and the inner peripheral surface of the connecting tube 3 in this embodiment. Yes. The abutting cylinder portion 3b is formed thin so as to be elastically expandable / reducible. In particular, in this embodiment, the taper angle of the outer peripheral surface of the contact cylindrical portion 3b is set larger than the taper angle of the inner peripheral surface, and the thickness of the contact cylindrical portion 3b becomes thinner toward the tip side. Yes. As a result, the abutting tube portion 3b can be elastically expanded and contracted toward the distal end side.

  The outer peripheral surface of the contact cylinder part 3b is the second contact surface 3c. When the plug P is inserted into the mounting hole 2b at least until the connection tube 3 reaches the connection position, the second abutment surface 3c is in press contact with the intersection between the tip surface of the plug P and the inner peripheral surface. The position, outer diameter, and taper angle are set. As long as the second contact surface 3c satisfies the condition that at least when the connection tube 3 is located at the connection position, the second contact surface 3c is in contact with the intersection of the tip surface and the inner peripheral surface of the plug P, the taper surface Pb is the contact surface. You may be comprised so that a cross | intersection part may be contacted in any before and after contacting 3a. In this embodiment, the second contact surface 3c is configured to come into contact with the plug P after the taper surface Pb is pressed into contact with the contact surface 4a. That is, when the taper surface Pb of the plug P is in press contact with the contact surface 4 a, the contact member 4 is elastically deformed so as to contract in the axial direction of the connection tube 3. Then, the plug P moves forward by the amount of elastic deformation of the contact member 4, and the plug P comes into pressure contact with the second contact surface 3c. In addition, you may form the taper surface which has the same taper angle as the 2nd contact surface 3c in the intersection part of the plug P which the 2nd contact surface 3c contacts.

  As described above, the contact of the second contact surface 3c with the plug P may be simultaneous with the contact of the tapered surface Pb with the contact surface 4a. Alternatively, the second contact surface 3c may contact before the tapered surface Pb contacts the contact surface 4a. In that case, when the plug P is in press contact with the second contact surface 3c, the contact cylinder portion 3b is elastically deformed to reduce its diameter, and the plug P advances by that amount. As a result, the tapered surface Pb is in press contact with the contact surface 3a. In this case, the contact of the tapered surface Pb with the contact surface 3a may be performed between the time when the connection tube 3 starts moving from the standby position to the connection position and before reaching the connection position.

  The contact cylinder portion 3 b may be formed so as to be elastically deformable in the axial direction of the connection cylinder 3. In that case, the front end surface of the contact cylinder portion 3b is the second contact surface. And the 2nd contact surface is made to press-contact with the cyclic | annular front end surface located between the front end surface of the plug P, ie, the taper surface Pb, and an internal peripheral surface.

  When the plug P is connected to the socket 1 in the gas socket 1 configured as described above, the plug P not only contacts the contact surface 4a but also contacts the second contact surface 3c. In addition, since the second contact surface 3c is formed on the connection tube 3 made of a material that is more resistant to deterioration than the contact portion 4, even if the contact member 4 deteriorates, the connection tube 3 deteriorates. There is no. Therefore, even if the airtightness between the plug P and the contact surface 4a is lowered, the airtightness between the contact surfaces of the plug P and the second contact surface 3c can be maintained at a high level. Therefore, it is possible to prevent the airtightness between the plug P and the connection tube 3 from being lowered.

3 and 4 show a reference example related to the present invention, although it is not included in the scope of the present invention . In the gas socket 1 ′ of this reference example , a primary side gas pipe is connected to the connection pipe 8, and gas is supplied from the socket 1 to the plug P. For this reason, the configuration of the socket 1 ′ is different from that of the socket 1 in the following points. Hereinafter, a configuration different from the above embodiment of the present invention will be described for the reference example . In the reference example , the same parts as those in the above embodiment of the present invention are designated by the same reference numerals, and the description thereof is omitted.

  In the socket body 2 ′ of the socket 1 ′, the through hole 2 a penetrates from the right end surface to the left end surface on the axis of the socket body 2 ′ without being divided into the mounting hole 2 b and the mounting hole 2 c. A connecting pipe 8 'is fitted and fixed to the left end of the through hole 2a. The connecting pipe 8 'is a straight pipe body, but may be bent in a "<" shape like the above embodiment, and in that case, it may be rotatably fitted. Good.

  An annular protrusion 2j is formed on the inner peripheral surface of the through hole 2a. A valve seat 2k having a tapered shape is formed on the surface facing the left side of the annular protrusion 2j. By the valve seat 2k, the inside of the through hole 2a is divided into a left upstream portion and a right downstream portion.

  Further, a valve body 13 is used in place of the connection cylinder 3. The valve body 13 has a bottomed cylindrical shape and is movably fitted to the inner peripheral surface of the annular projecting portion 2j. Moreover, the holding cylinder 10 is fitted to the outer peripheral surface of the right end portion of the valve body 13 via the slide cylinder 14, and the holding cylinder 10 is slidably fitted to the inner peripheral surface of the through hole 2a. . Thus, the valve body 13 is provided in the through hole 2a so as to be movable in the axial direction between the closed position shown in FIG. 3 and the open position shown in FIG. The outer peripheral surface of the holding cylinder 10 and the inner peripheral surface of the through hole 2a are hermetically sealed by a seal member 15 such as an O-ring.

  The valve body 13 is inserted into the through hole 2a with its bottom 13a positioned on the upstream side of the valve seat 2k and with its open end positioned on the right side of the valve seat 2k. A seal member 13b made of an O-ring or the like is provided on the outer peripheral surface of the valve body 13 in the vicinity of the bottom 13a so as not to move. When the seal member 13b is seated on the valve seat 2k by the first coil spring (valve urging member) 5, the valve body 13 cannot move further to the right. The position of the valve body 13 at this time is a closed position. When the valve body 13 is located at the closed position, the valve body 13 blocks the upstream portion and the downstream portion of the through hole 2a. That is, the through hole 2 a is closed by the valve body 13.

  The valve body 13 is formed with a window hole 13c that penetrates the peripheral wall portion from the outer peripheral surface to the inner peripheral surface. The window hole 13c is located downstream of the valve seat 2k when the valve body 13 is in the closed position, but when the valve body 13 is moved to the open position, at least a part of the window hole 13c is It is located upstream from the valve seat 2k and enters the upstream portion of the through hole 2a. As a result, the upstream portion and the downstream portion of the through hole 2a communicate with each other through the window hole 13c and the inside of the valve body 13, and the gas in the upstream portion passes through the inside of the valve body 13 to the downstream portion. Inflow.

  As described above, the holding cylinder 10 is fitted to the outer peripheral surface of the right end portion of the valve body 13 so as to be movable in the axial direction via the slide cylinder 14. That is, the slide cylinder 14 is fitted to the outer periphery of the valve body 13 so as to be movable in the axial direction of the valve body 13, and the holding cylinder 10 is fixed to the outer peripheral surface of the slide cylinder 14. The slide cylinder 14 and the holding cylinder 10 may be integrally formed. In other words, the holding cylinder 10 may be provided on the outer periphery of the valve body 13 so as to be directly movable.

  The holding cylinder 10 (and the contact member 4 fixed to the holding cylinder 10) can move between the initial position shown in FIG. 3 and the sealing position shown in FIG. Is biased from the sealing position toward the initial position by a third coil spring (abutting biasing member) 16 provided therebetween. An engagement protrusion 14 a is formed on the inner peripheral surface of the slide cylinder 14. When the engagement protrusion 14a hits an engagement surface 13d formed on the outer peripheral surface of the valve body 13, the holding cylinder 10 and the slide cylinder 14 can no longer move to the right and stop. The positions of the holding cylinder 10 and the slide cylinder 14 at this time are the initial positions. On the other hand, as will be described later, the holding cylinder 10 is moved from the initial position to the sealing position by the plug P when the plug P is inserted into the through hole 2a beyond a predetermined position. When the plug P is further inserted into the through hole 2a after the holding cylinder 10 reaches the sealing position, the valve body 13 is moved from the closed position to the open position, as will be described later.

  A sub-contact surface 13 e is formed on the right end surface (tip surface) of the valve body 13. The auxiliary contact surface 13e is formed in a taper shape that tapers toward the right. When the plug P is inserted into the through hole 2a up to a predetermined position in a state where the valve body 13 is in the closed position, the auxiliary contact surface 13e intersects the tip surface of the plug P and the inner peripheral surface. I hit it. In this embodiment, a tapered surface Pd having the same taper angle as that of the auxiliary contact surface 13e is formed at the intersection between the tip surface and the inner peripheral surface of the plug P, and this tapered surface Pb is the auxiliary contact surface. It hits 13e. However, the tapered surface Pb is not necessarily formed, and the intersection of the tip surface of the plug P and the inner peripheral surface may abut against the auxiliary contact surface 13e. Moreover, you may form the sub contact surface 13e in the plane whose angle with the axis line of the through-hole 2a is 90 degrees, without forming in taper shape. In that case, the taper surface Pd is not formed, and the sub-contact surface 13e is annularly pressed and contacted with the tip surface of the plug P located on the inner peripheral side of the taper surface Pb.

  When the holding cylinder 10 is located at the initial position, the auxiliary contact surface 13e is disposed so as to be located on the left side of the contact surface 4a. Therefore, when the plug P is inserted into the through hole 2a, the tapered surface Pb of the plug P first abuts against the contact surface 4a. In this state, when the plug P is further inserted into the through hole 2a, the holding cylinder 10 is pushed and moved to the left by the plug P. When the plug P is inserted into the through-hole 2a until the holding cylinder 10 reaches the sealing position from the initial position, the tapered surface Pd of the plug P comes into pressure contact with the sub-contact surface 13e. Therefore, when the plug P is further inserted into the through hole 2 a, the valve body 13 is moved from the closed position toward the open position against the urging force of the first coil spring 5. At this time, the holding cylinder 10 moves to the left together with the valve body 13 in a state of being positioned at the sealing position with respect to the valve body 13. When the plug P is inserted into the through hole 2a until the valve body 13 reaches the open position, the engaging member 11 enters the engaging recess Pc, and the plug P is connected to the socket 1 '. Of course, at this time, the operation cylinder 6 is moved to the engagement position. Therefore, the plug P can be extracted from the socket 1 ′ by moving the operation cylinder 6 from the engagement position to the release position. When the plug P is removed from the socket 1 'and moved, the valve body 13 first moves from the open position to the closed position. Thereafter, the holding cylinder 10 moves from the sealing position to the initial position.

  Also in the gas socket 1 ′ having the above configuration, when the plug P is connected to the socket 1 ′, not only the taper surface Pb presses and contacts the contact surface 4 a but also the taper surface Pd presses and contacts the sub contact surface 13 e. To do. And the valve body 13 is comprised with resin, such as a metal or polyacetal which was excellent in deterioration resistance compared with the contact member 4, similarly to the connection cylinder 3 of the said previous embodiment. Therefore, even if the contact member 4 is deteriorated, it is possible to prevent the airtightness between the plug P and the valve body 13 from being lowered. Needless to say, the entire valve body 13 need not be made of a material having excellent deterioration resistance, and only the tip portion may be made of a material having excellent deterioration resistance.

Incidentally, reference examples, but the present invention is not limited to the above configuration, it is possible suitable Yichun changed.
For example, in the above reference example , the third coil spring 16 is provided between the annular protrusion 2j and the holding cylinder 10, but the third coil spring 16 is provided between the valve body 13 and the holding cylinder 10. May be provided. However, when doing so, it is necessary to set the biasing force of the third coil spring 16 to be weaker than the biasing force of the first coil spring 5. Otherwise, when the plug 10 hits the contact surface 4a, the valve body 13 moves from the closed position to the open position without maintaining the stopped state, and the plug P hits the sub contact surface 13e. Because it becomes impossible to. Conversely, when the third coil spring 16 is provided between the annular projecting portion 2j (socket body 2) and the holding cylinder 10 as in the above reference example , the first coil spring 5 and the third coil spring 16 are provided. Any of the urging forces may be increased.
In the above reference example , the initial position of the holding cylinder 10 (contact member 4) is determined by the engagement protrusion 14a of the slide cylinder 14 and the engagement surface 13d of the valve body 13. Abutting portions that abut each other on the outer peripheral surface and the inner peripheral surface of the through hole 2a may be provided, and the initial position of the holding cylinder 10 may be determined by the abutting portions. In that case, the holding cylinder 10 (abutting member) is arranged so that the abutting surface 4a abuts against the plug P while the plug P abuts against the sub abutting surface 13e and moves the valve body 13 from the closed position to the open position. The initial position of 4) may be determined. If so determined, the holding cylinder 10 moves together with the valve body 13 when the plug P hits the contact surface 4a, and the holding cylinder 10 also stops when the valve body 13 reaches the open position. The position of the holding cylinder 10 at that time is the sealing position.

It is sectional drawing which shows one Embodiment of this invention in the state in which the plug is not connected. It is sectional drawing which shows the embodiment in the state in which the plug was connected. It is sectional drawing which shows the reference example of this invention in the state in which the plug is not connected. It is sectional drawing which shows the reference example in the state in which the plug was connected.

Explanation of symbols

P plug 1 Gas socket 1 'Gas socket 2 Socket body 2' Socket body 2a Through hole 3 Connection cylinder 3b Contact cylinder 3c Second contact surface 4 Contact member 4a Contact surface 5 First coil spring Urging member; urging member for valve)
13 Valve body 13e Sub contact surface 16 3rd coil spring (contacting biasing member)

Claims (2)

It is movable between a socket body having a through-hole into which a plug is inserted from one end opening, and a standby position in the through-hole and a connection position separated from the standby position on the other end side of the through-hole. A connecting tube provided; a biasing member that biases the connecting tube from the connection position toward the standby position; and an elastic material such as rubber, formed in a ring shape, in the biasing direction of the biasing member An abutting member provided at the distal end of the connection tube, and the distal end of the abutting member in the urging direction of the urging member is annularly formed on the distal end surface of the plug inserted into the through hole. In the gas socket in which the contact surface to be pressed and contacted is formed,
At least the tip of the connection tube is made of a material that is more resistant to deterioration than the contact member,
A second abutment that is annularly pressed into contact with the distal end surface of the plug at least when the connection tube is located at the connection position, at the distal end portion of the connection tube that is made of a material having excellent deterioration resistance. A surface is formed ,
After the contact member is elastically deformed by pressing the plug against the contact surface, the second contact surface is pressed against the plug,
The gas socket according to claim 1, wherein the second contact surface is formed in a tapered shape, and is in press contact with an intersection between the tip end surface and the inner peripheral surface of the plug . The contact cylinder part which can be elastically expanded / contracted diameter is formed in the front-end | tip part of the said connection cylinder, The said 2nd contact surface is formed in the outer peripheral surface of this contact cylinder part, It is characterized by the above-mentioned. The gas socket according to 1.

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