JP2015083878A - Gas plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas plug which is suppressed in a length in a gas circulation direction short.SOLUTION: In a gas plug which comprises, at a cylinder plug main body 2 having a gas flow passage 1 therein, a fuse mechanism H for preventing the excessive flow-out of gas in the gas flow passage 1, and a connecting part 5 disposed at an inner wall 2i of the plug main body 2 for connecting a gas pipe 4 to an upstream-side region 21 of the plug main body 2 so as to communicate with each other, the fuse mechanism H is constituted while protruding to an upstream-side end part 5u of the connecting part 5 rather than a downstream-side end part 5l of the connecting part 5, so as to be freely insertable into the gas pipe 4 which is connected to the connecting part 5.

Description

  The present invention provides a cylindrical plug body having a gas flow passage formed therein, a fuse mechanism for preventing excessive gas outflow in the gas flow passage, and a gas pipe at an upstream end of the plug body. The present invention relates to a gas plug including a connection portion provided on an inner wall of the plug body for communication connection.

The gas plug as described above is installed on a wall portion or the like by, for example, connecting a gas pipe disposed inside the wall portion or the like to the upstream end portion of the plug body. When the gas pipe is connected to the upstream end of the plug main body, a connection portion is provided on the inner wall of the plug main body, and the gas pipe is connected to the plug main body by using this connection portion.
Conventionally, regarding the positional relationship between the fuse mechanism and the connection portion in the gas flow direction of the gas flow passage, the connection portion and the fuse mechanism in the gas flow direction in a state where the connection portion is located upstream of the fuse mechanism in the gas flow direction. Are arranged in a line. Thereby, the connection portion and the fuse mechanism do not overlap in the gas flow direction, the fuse mechanism does not get in the way, the gas pipe can be connected to the connection portion, and the gas pipe connected to the connection portion is In addition, it is disposed upstream of the fuse mechanism in the gas flow direction (see, for example, Patent Document 1).

JP 2000-297870 A

  In the gas plug described in Patent Document 1, since the connection portion and the fuse mechanism are arranged so as to be aligned in the gas flow direction without overlapping in the gas flow direction, as the length in the gas flow direction, The total length of the connecting portion and the total length of the fuse mechanism are added, and the gas plug becomes longer in the gas flow direction. Therefore, it is necessary to secure an installation space for the plug body having a long length in the gas flow direction in a limited space such as the inside of the wall or the like, which makes it difficult to secure the installation space. For this reason, there is a possibility that the restriction on the place where the gas plug can be installed becomes severe due to the problem of the size of the plug body.

  An object of this invention is to implement | achieve the gas plug which restrained the gas distribution direction length short in view of the said situation.

  A cylindrical plug body having a gas flow passage according to the present invention formed therein, a fuse mechanism for preventing excessive gas outflow in the gas flow passage, and a gas pipe at an upstream end of the plug body A gas plug including a connecting portion provided on an inner wall of the plug body for communication connection, wherein the fuse mechanism has an upstream end portion of the connecting portion rather than a downstream end portion of the connecting portion. It protrudes to the side and is in a point that it is configured to be freely inserted into the gas pipe connected to the connecting portion.

According to this configuration, since the fuse mechanism protrudes toward the upstream end portion of the connection portion rather than the downstream end portion of the connection portion, the fuse mechanism upstream of the connection portion rather than the downstream end portion of the connection portion. The protruding part on the end side is located inside, the connecting part is located outside the protruding part of the fuse mechanism, and the protruding part of the fuse mechanism and the connecting part overlap in the gas flow direction. Can be a double structure. Therefore, since the fuse mechanism can be arranged so as to have such a double structure, the length of the gas plug in the gas flow direction can be shortened. Moreover, since the fuse mechanism is inserted into the gas pipe connected to the connection portion, even if the fuse mechanism is arranged so that there is a portion where the fuse mechanism and the connection portion overlap in the gas flow direction, When connecting the gas pipe, it is possible to connect the gas pipe to the connecting portion without disturbing the fuse mechanism. Accordingly, it is possible to realize a gas plug in which the length of the gas flow direction is kept short, and it is possible to easily connect the gas pipe to the connection portion.

  In addition, when the connection portion and the gas pipe are connected, the fuse mechanism and the connection portion are arranged so that a predetermined space is generated between the outer peripheral surface of the fuse mechanism and the inner peripheral surface of the gas pipe. Is preferably arranged.

  According to this configuration, a gap can be provided in the outer peripheral portion of the fuse mechanism. By providing this gap, not only the flow of gas supplied from the gas pipe into the fuse mechanism but also the flow toward the gap provided in the outer peripheral portion of the fuse mechanism can be performed. Therefore, foreign matter such as cutting oil in the pipe flowing along the gas flow can be pushed into the gap. Thereby, the gas plug which can suppress that a foreign material flows into the inside of a fuse mechanism and a foreign material adheres to a fuse mechanism is realizable.

  Further, in the fuse mechanism, the upstream portion in the gas flow direction of the gas flow passage is positioned closer to the upstream end portion of the connection portion than the downstream end portion of the connection portion, and the downstream portion is connected to the connection portion. It is preferable that it is arranged so as to be located downstream of the downstream end of the part, and the downstream part of the fuse mechanism is held by the inner wall of the plug body.

  For example, if the fuse mechanism is arranged so as to overlap the connection portion over the entire length of the fuse mechanism in the gas flow direction, the connection portion is located outside the fuse mechanism, and it becomes difficult to hold the fuse mechanism. For such a case, according to this configuration, the upstream portion of the fuse mechanism is a portion overlapping the connecting portion in the gas flow direction, and the downstream portion of the fuse mechanism is held on the inner wall of the plug body. While the length of the gas plug in the gas flow direction can be shortened, the fuse mechanism can be appropriately held. In addition, since the fuse mechanism is held using the inner wall of the plug body, it is not necessary to provide another member, and the fuse mechanism can be appropriately held with a simple configuration.

  In the fuse mechanism, it is preferable that the upstream end portion of the upstream portion is arranged in the same plane as the upstream end portion of the plug body.

  According to this configuration, since the fuse mechanism does not protrude upstream from the upstream end of the plug body, when the gas pipe is connected to the plug body, the tip of the gas pipe contacts the fuse, The possibility of deformation and damage can be suppressed. That is, it is possible to realize a gas plug that is easy to handle during construction.

  Furthermore, it is preferable that the connecting portion is provided with a connecting portion side screw portion that is screwed into a gas pipe side screw portion formed on the outer peripheral portion of the gas pipe.

  According to this configuration, the gas pipe can be connected to the plug body by the connection side screw portion.

  In addition, it is preferable that a flexible pipe joint part that allows a flexible pipe used as the gas pipe to be detachable from the connection part is provided as the connection part.

  According to this structure, a flexible pipe | tube can be connected to a plug main body by a flexible pipe joint part.

  Furthermore, it is preferable that the gas flow passage is provided in a straight line along the axial direction of the plug body.

  Here, in the case of a plug in which the gas flow passage is provided linearly along the axial direction of the plug main body, the size of the gas plug is mainly determined by the length in the axial direction. Therefore, according to this configuration, the gas plug can be made smaller by shortening the axial length of the gas plug. Moreover, since the plug body is linear, when the gas plug is installed, the gas plug can be installed coaxially with the gas pipe connected to the plug body, and the installation space can be reduced. Furthermore, by making the plug body straight, the area of the opening formed in the wall can be reduced when the gas plug is installed in a form embedded in the wall or in a form penetrating the wall.

Explanatory drawing of the gas plug which concerns on 1st Embodiment of this invention. Explanatory drawing of the state with which the gas plug and gas pipe which concern on 1st Embodiment of this invention were connected. Explanatory drawing of reset operation | movement of the gas plug which concerns on 1st Embodiment of this invention. Explanatory drawing of the gas plug which concerns on 2nd Embodiment of this invention. Explanatory drawing of the state with which the gas plug and gas pipe which concern on 2nd Embodiment of this invention were connected. Schematic of a gas plug according to another embodiment of the present invention Schematic of a gas plug according to another embodiment of the present invention

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

1. 1. Outline of Gas Plug The gas plug according to the first embodiment prevents an excessive outflow of gas in the gas flow passage 1 in the cylindrical plug body 2 in which the gas flow passage 1 is formed, as shown in FIG. And a connecting portion 5 provided on the inner wall 2i of the plug main body 2 in order to connect the gas pipe 4 to the upstream portion 21 of the plug main body 2.

  Here, the gas flow passage 1 formed in the plug body 2 has a circular cross section, and is provided in a straight line along the axial direction (X direction in FIG. 1) of the plug body 2. In other words, the gas flow passage 1 is linearly provided from the upstream side to the downstream side of the plug body 2.

  In the gas flow passage 1 formed inside the plug body 2, the gas flowing through the connection portion 5, the fuse mechanism H including the cylindrical member H1, the reset means R, which will be described later, and the gas flow passage 1 are sequentially arranged from the upstream side. A gas stopper G that can prevent outflow from the gas outlet 3 is provided. The gas flow passage 1 is formed in the plug main body 2 so as to allow gas to pass through the inside of the cylindrical member H1 to the gas outlet 3 while avoiding the reset means R and the gas plug G.

In the gas plug of the first embodiment, a gas pipe 4 is connected to a connecting portion 5 provided on the upstream side of the plug body 2 as shown in FIG. Here, the gas pipe 4 is, for example, a gas pipe disposed inside a wall portion or the like. By connecting the gas pipe 4 to the plug body 2, gas can be circulated between the gas flow path in the gas pipe 4 and the gas flow passage 1 formed in the plug body 2.

  On the other hand, the gas connector 100 can be connected to the downstream side of the plug body 2. The gas connector 100 is for connecting a gas hose connected to a gas appliance (for example, a gas stove or a gas fan heater) and the plug body 2. Since the configuration of the gas connector 100 that can be attached to and detached from the plug main body 2 is a known configuration, a detailed description thereof will be omitted. By connecting the gas connector 100 to the plug main body 2 connected to the gas pipe 4, the gas flow path in the gas pipe 4, the gas flow passage 1 formed in the plug main body 2, and the gas appliance are connected. The gas flow path formed by the gas hose thus communicated communicates with the gas.

  In the following, the X direction in FIGS. 1 to 5 is referred to as a gas flow direction, and the downstream side in the gas flow direction that is the left side of the X direction in FIGS. The upstream side in the gas flow direction that is the right side in the X direction in FIG.

  Next, details of each part of the connection part 5, the fuse mechanism H, the reset means R, and the gas stopper G provided in the plug body 2 will be described.

2-1. The connection part The connection part 5 is a part provided on the inner peripheral surface (inner wall 2i) of the upstream part 21 of the plug body 2 in order to connect the gas pipe 4 and the plug body 2 in communication. In the gas plug of the first embodiment, as the gas pipe 4 connected to the plug main body 2, a gas pipe-side screw portion 7 is provided on the outer peripheral portion 4 o of the end of the gas pipe 4 on the side connected to the plug main body 2. Assumes something. Therefore, the connecting part 5 of the plug body 2 is screwed into the gas pipe side screw part 7 formed on the outer peripheral part 4o of the gas pipe 4 so as to be screwed with the gas pipe side screw part 7 provided in the gas pipe 4. The connecting portion side screw portion 9a is provided.

  Here, the description of the connection unit 5 will be supplemented. When a screw hole is machined to form the connection portion 5 in the plug body 2, a region in which a thread that is screwed into the gas pipe side screw portion 7 is generated on the inner peripheral surface of the upstream portion 21 of the plug body 2 As a result, a region where incomplete threads are generated downstream of the region is generated. In the gas plug of the first embodiment, only the region in which the thread that engages with the gas pipe side screw portion 7 is generated on the inner peripheral surface of the upstream portion 21 of the plug body 2 is referred to as the connection portion 5. The area where incomplete threads are generated is hereinafter referred to as area d.

2-2. Fuse Mechanism The fuse mechanism H is provided in the gas flow passage 1 on the upstream side of the gas plug G and the reset means R and on the downstream side of the connection portion 5. The fuse mechanism H includes a cylindrical member H1 in which a flow path for flowing gas is formed. Inside the cylindrical member H1, there is a fuse valve H2 that is movable in the axial direction of the plug body 2 between an initial position (see FIG. 2) that allows the gas flow path and an operating position (see FIG. 3) that blocks the gas flow. And the operated member H3 that receives a pressing operation to the upstream side of the gas flow passage 1 as a reset operation from the reset means R, and the fuse valve H2 and the operated member H3 are supported movably in the axial direction of the plug body 2. A support member H4 is provided. The fuse valve H2 is energized so as to return to the initial position. When excessive gas outflow occurs in the gas flow passage 1, the fuse valve H2 moves from the initial position to the operating position in response to the gas flow pressure. Is prevented.

2-3. Reset means The reset means R performs a reset operation for returning the fuse valve H2 to the initial position in a state where the fuse valve H2 of the fuse mechanism H is moved to the operating position. The reset means R is configured to perform a reset operation using a user's action of mounting the gas connector 100 on the plug body 2, and as a reset operation, the downstream end of the operated member H <b> 3 is configured. An operation of pressing the gas flow passage 1 upstream is performed. The reset means R distributes the gas through the downstream end of the operated member H3 during the movement from the closed position of the gas plug G in the axial direction of the plug body 2 when the gas connector 100 is attached to the plug body 2. A reset operation for pressing the upstream side of the path 1 is performed, and at the end of the movement of the gas plug G, the reset operation for the downstream end of the operated member H3 is released.

  The reset means R includes a pressing operation portion R1 formed integrally with the first valve body G1 so as to extend from the upstream end portion of the first valve body G1, which is a gas plug G, to the upstream side of the gas flow passage 1. ing.

  The pressing operation portion R1 is configured by a protrusion that extends upstream of the gas flow passage 1 and has an upstream end that is spherical, and is integrally formed with the first valve body G1.

2-4. Gas plug The gas plug G is connected to the first valve body G1 which is closably operated so as to prevent the gas flow to the gas outlet 3 in the gas flow passage 1 and the first valve body G1 in the gas flow passage 1. Is also provided with a second valve body G2 that can be freely closed on the upstream side in the gas flow direction, and a support member G3 that supports the first valve body G1 and the second valve body G2. The support member G3 is provided in the gas flow passage 1 so as to be movable in the axial direction of the plug body 2 while supporting the first valve body G1 and the second valve body G2.

2-5. Hereinafter, based on FIG. 3, operations of the gas plug G, the fuse mechanism H, and the reset unit R during the reset operation by the reset unit R will be described. When an excessive outflow of gas occurs in the gas flow passage 1 and the fuse mechanism H is activated, the fuse valve H2 in the fuse mechanism H starts to flow from the initial position shown in FIG. 2 to the fuse valve H2 as shown in FIG. It moves to the operating position downstream from the initial position to block.

  In this way, when the fuse valve H2 moves to the operating position, the gas connector 100 is removed from the plug body 2, and the gas plug G is positioned at the closed position (see FIG. 2) to prevent gas flow. . When the gas connector 100 is attached to the plug body 2, as shown in FIG. 3, the pressing portion 105 of the gas connector 100 presses the gas plug G toward the upstream side of the gas flow passage 1, and the gas plug G The gas flow passage 1 is moved from the closed position to the upstream side of the gas flow passage 1 to open the valve. At this time, the pressing operation portion R1 of the reset means R moves integrally with the gas stopper G as the gas stopper G moves, so that the pressing operation portion R1 is directly on the head of the operated member H3 of the fuse mechanism H. A reset operation is performed in which the downstream end of the operated member H3 is pressed against the upstream side of the gas flow passage 1 in contact. By this reset operation, the fuse valve H2 is returned to the initial position. Then, by further movement of the gas plug G, the pressing operation portion R1 moves over the head of the operated member H3 and moves upstream, and finally, the pressing operation portion R1 is upstream of the head of the operated member H3. The reset operation is released by moving to a position that is separated to the side. Further, when the gas connector 100 is removed from the plug body 2, the pressing operation portion R1 also moves downstream as the gas plug G moves downstream, and further moves over the operated member H3. As shown in FIG. 2, it moves to the downstream side and returns to a position that is spaced further downstream than the head of the operated member H3.

3. Positional Relationship Between Connection Portion and Fuse Mechanism As shown in FIG. 2, in the gas plug of the first embodiment, the fuse mechanism H has an upstream end portion 5 u of the connection portion 5 rather than the downstream end portion 5 l of the connection portion 5. It protrudes in the side and is comprised so that insertion in the gas pipe 4 connected to the connection part 5 is possible. That is, as shown in FIG. 1, a part of the fuse mechanism H provided in the plug body 2 is arranged so as to be located on the upstream side in the gas flow direction with respect to the downstream end portion 5 l of the connection portion 5. Has been. Therefore, when the gas pipe 4 is inserted into the plug body 2 up to the downstream end 5l of the connection part 5, the connection part 5, the gas pipe 4 and the fuse mechanism H are in the gas flow direction (X direction in FIG. 2). , Are arranged so as to have overlapping portions in the axial direction of the plug body 2. When viewed in a cross section in the gas flow direction, a three-layer structure is formed in which the connecting portion 5, the gas pipe 4, and the fuse mechanism H are arranged in order from the outer peripheral portion toward the inner peripheral portion.

  In addition, the fuse mechanism H and the connection portion 5 have overlapping portions in the gas flow direction, but do not overlap over the entire length of the fuse mechanism H. In the flow direction, the upstream portion 61 is located on the upstream end 5 u side of the connecting portion 5 relative to the downstream end 5 l of the connecting portion 5, and the downstream portion 62 is positioned on the downstream end portion 5 l of the connecting portion 5. It arrange | positions so that it may be located in the downstream. Thereby, only the upstream side part 61 of the fuse mechanism H becomes a part which overlaps with the connection part 5 in a gas distribution direction. In the fuse mechanism H, the downstream portion 62 of the fuse mechanism H is held by the inner wall 2 i of the plug body 2. Here, a portion of the fuse mechanism H that overlaps with the connection portion 5 in the gas flow direction (X direction in FIG. 2, the axial direction of the plug body 2) is referred to as an upstream portion 61. Moreover, the part which overlaps with the area | region d in the gas distribution direction among the fuse mechanisms H is called the intermediate part 61b. Further, a portion located on the downstream side of the intermediate portion 61b is referred to as a downstream portion 62.

  The inner wall 2i of the plug body 2 has a fuse mechanism holding region 22 formed so that the inner diameter is equal to the outer diameter of the downstream portion 62 of the fuse mechanism H, and the inner diameter is larger than the outer diameter of the downstream portion 62 of the fuse mechanism H. The fuse mechanism fixing region 23 is formed to be small. The fuse mechanism H is fixed and held so that the downstream portion 62 cannot move in the radial direction perpendicular to the gas flow direction by the fuse mechanism holding area 22 of the inner wall 2i, and the gas flow is fixed by the fuse mechanism fixing area 23 of the inner wall 2i. It is fixed so that it cannot move in the direction.

  Further, when the connecting portion 5 and the gas pipe 4 are connected, the fuse mechanism H is connected so that a predetermined space S is generated between the outer peripheral surface Ho of the fuse mechanism H and the inner peripheral surface 4i of the gas pipe 4. Part 5 is arranged. That is, in the gas plug of the first embodiment, the fuse mechanism H and the gas pipe 4 are concentrically arranged, and the inner peripheral surface of the gas pipe 4 with respect to the outer diameter of the cylindrical member H1 of the fuse mechanism H. The diameter of 4i (the inner diameter of the gas pipe 4) and the inner diameter of the connecting portion 5 are configured to be large. Further, in a state where the gas pipe 4 is connected to the plug body 2, the gas flow path 1 in the plug body 2 and the gas flow path in the gas pipe 4 are configured to allow the gas to flow, thereby forming the gas flow path 1. A space S exists on the outer peripheral side of the fuse mechanism H. That is, the gas flowing through the gas flow path of the gas pipe 4 is branched into the space S and the cylindrical member H1 of the fuse mechanism H in the plug body 2, and the cutting oil or the like in the gas pipe 4 is Foreign matter is allowed to flow into the space S. Here, the space S is large enough to allow foreign matter to flow in. More specifically, the space S is equal to or greater than the thickness of the gas pipe 4 in the radial direction of the plug body 2, and when the gas pipe 4 is connected to the plug body 2, the inner peripheral surface of the gas pipe 4 is connected to the fuse mechanism H. The size is such that it does not touch.

  Furthermore, in the gas plug of the first embodiment, a space Sb is also generated between the region d where the incomplete thread is generated on the inner peripheral surface of the upstream portion 21 of the plug body 2 and the intermediate portion 61b. In a state where the connecting portion 5 and the gas pipe 4 are connected, the gas pipe 4 is not inserted up to the space Sb, and is formed between the outer peripheral surface Ho of the fuse mechanism H and the inner peripheral surface 4i of the gas pipe 4. The space Sb has a shape that spreads outward in the radial direction of the plug body 2 rather than the space S. Therefore, since the space Sb is formed in a pocket shape on the downstream side of the space S, the space Sb can play a role of efficiently storing foreign matters such as cutting oil in the pipe flowing into the space S.

Further, in the fuse mechanism H, the upstream end portion Hu of the upstream portion 61 is disposed on the same plane as the upstream end portion 2 u of the plug body 2. That is, in the state where the fuse valve H2 of the fuse mechanism H is in the initial position allowing the gas flow path, the upstream end of the fuse valve H2, which is the upstream end Hu of the fuse mechanism H, is upstream of the plug body 2. Arranged on the end face. In other words, the fuse mechanism H is arranged in the plug body 2 so as to be located on the most upstream side as long as it can maintain a state in which a part of the fuse mechanism H does not protrude from the plug body 2.

[Second Embodiment]
This 2nd Embodiment is another embodiment which shows an example by which a flexible pipe joint is provided instead of the connection part 5 screw part 9a being provided in the connection part 5 in the said 1st Embodiment. Since the other configuration is the same as that of the first embodiment, the description of the other configuration is omitted, and the following description will focus on the connecting portion 5 based on FIGS. 4 and 5.

  In the first embodiment, the gas pipe 4 connected to the plug body 2 is assumed to be provided with the gas pipe side screw portion 7 on the outer peripheral portion 4o of the end of the gas pipe 4 on the side connected to the plug body 2. did. In contrast to the first embodiment, in the second embodiment, as the gas pipe 4 to be connected to the plug body 2, a metal flexible pipe 8 having a resin coating on one end connected to the plug body 2 peeled off for a predetermined length is used. Assumed.

  For this reason, as shown in FIG. 4, the plug body 2 of the second embodiment has a flexible pipe joint portion 9 b that allows the flexible pipe 8 used as the gas pipe 4 to be detachable from the connecting section 5 as the connecting section 5. Is provided. The flexible pipe joint portion 9b can be inserted until it comes into contact with the downstream end portion 21l of the upstream portion 21 of the plug body 2 as will be described later. For this reason, the connection part 5 in 2nd Embodiment shows the area | region from the upstream edge part 2u of the plug main body 2 to the downstream edge part 21l of the upstream site | part 21 in the internal peripheral surface of the plug main body 2. FIG. . Therefore, in the second embodiment, the fuse mechanism H includes the upstream portion 61 located upstream from the downstream end portion 5l of the connection portion 5 and the downstream side located downstream from the downstream end portion 5l of the connection portion 5. The region 62 is divided into two parts.

  In the gas plug of the second embodiment, the downstream of the space S generated between the outer peripheral surface Ho of the fuse mechanism H and the inner peripheral surface 4i of the gas pipe 4 in a state where the gas pipe 4 is connected to the plug body 2. The side end surface is defined by the downstream end portion 21 l of the upstream portion 21 of the plug body 2. That is, the space S in the second embodiment is closed by the downstream end portion 21l. Therefore, the space S in the second embodiment is formed in a pocket shape. For this reason, the space S in the second embodiment has the effects of both the space S and the space Sb in the first embodiment.

  The configuration of the flexible pipe joint portion 9b is already known as disclosed in Japanese Patent Application Laid-Open No. 2010-286003. Therefore, the detailed description is omitted, and the flexible pipe 8 is connected to the plug body 2 here. Only the operation of the flexible pipe joint portion 9b will be described.

  The flexible pipe joint portion 9b of the second embodiment is a substantially cylindrical member, and is roughly configured by a seal member 91, a retaining portion 92, and a push ring 93 in order from the downstream side. Here, the seal member 91 and the retaining portion 92 are integrally formed so as to be movable in the gas flow direction. A fireproof packing 94, a waterproof packing 95, and a snap ring 96 are provided on the outer peripheral surface of the flexible pipe joint portion 9 b, that is, the surface that contacts the inner wall 2 i of the plug body 2. Further, in an initial state where the flexible tube 8 is not connected to the plug body 2, a spacer 97 for preventing malfunction is provided.

FIG. 5 shows a state in which the flexible tube 8 is connected to the plug body 2. In the initial state shown in FIG. 4, when the flexible tube 8 is inserted into the plug body 2, first, the flexible tube 8 comes into contact with the downstream end portion 91l of the seal member 91 of the flexible tube joint portion 9b. Seal member 91
When the flexible tube 8 is further inserted into the downstream side with the downstream end portion 91l in contact with the downstream end portion 91l, the seal member 91 is located downstream of the upstream portion 21 of the plug body 2 as shown in FIG. It moves to a position where it comes into contact with the side end portion 21l. At this time, a part of the retaining portion 92 formed so as to move integrally with the seal member 91 is drawn into the valley portion of the flexible tube 8 as shown in FIG. Thereafter, when the pusher wheel 93 in the state shown in FIG. 4 is pushed downstream, the spacer 97 is removed and moves to a position where it comes into contact with the retaining portion 92 as shown in FIG. In this way, the retaining portion 92 prevents the flexible tube 8 from moving in the gas flow direction, and the push ring 93 is fixed to the gas flow direction by the snap ring 96, so that the flexible tube 8 is plugged into the plug body. 2 (connection portion 5).

[Other Examples]
(1) In each of the above embodiments, the case where the entire downstream portion 62 of the fuse mechanism H is held by the inner wall 2i of the plug body 2 has been described as an example. However, the application range of the present invention is not limited to such a configuration. That is, for example, it is also a preferred embodiment of the present invention that the gas plug is configured such that only a part of the downstream portion 62 of the fuse mechanism H is held by the inner wall 2 i of the plug body 2. .

(2) In each of the above embodiments, the fuse mechanism H is described by taking as an example the case where the upstream end portion Hu of the upstream portion 61 is arranged on the same plane as the upstream end portion 2u of the plug body 2. did. However, the application range of the present invention is not limited to such a configuration. That is, for example, the gas plug may be configured such that the upstream end Hu of the upstream portion 61 of the fuse mechanism H is located on the downstream side of the end surface defined by the upstream end 2u of the plug body 2. It is one of the preferred embodiments of the present invention.

(3) In each of the above embodiments, the case where the gas plug is composed of the straight plug body 2 has been described as an example. However, the application range of the present invention is not limited to such a configuration. That is, for example, as shown in FIGS. 6 and 7, the gas plug can be configured from an L-shaped plug body. Since the L-shaped plug body is a known configuration, detailed description thereof will be omitted. In this case, the gas flow passage formed in the plug body 2 is arranged from the lower side to the upper side in order from the upstream side. And a horizontal flow path part that bends the gas flow direction from the vertical flow path part in the horizontal direction and leads it to the gas outlet 3. And the connection part 5 is formed in the upstream edge part of the up-and-down flow path site | part, and the fuse mechanism H protrudes in the upstream edge part side of the connection part 5 rather than the downstream edge part of the connection part 5. The gas pipe connected to the connecting portion 5 is configured to be freely inserted.

  The present invention provides a cylindrical plug body having a gas flow passage formed therein, a fuse mechanism for preventing excessive gas outflow in the gas flow passage, and a gas pipe at an upstream end of the plug body. It can be used as a gas plug provided with a connection portion provided on the inner wall of the plug main body for communication connection.

1: Gas flow passage 2: Plug main body 2i: Inner wall 2u: Upstream end 4: Gas pipe 4i: Inner peripheral surface 4o: Outer peripheral part 5: Connection part 5l: Downstream end part 5u: Upstream end part 7: Gas Pipe side screw part 8: Flexible pipe 9a: Connection part side screw part 9b: Flexible pipe joint part 21: Upstream part 61: Upstream part 62: Downstream part H: Fuse mechanism S: Space X: Gas flow direction

A tubular plug body in which a gas flow passage according to the present invention is formed is connected to a fuse mechanism for preventing excessive gas outflow in the gas flow passage, and a gas pipe is connected to an upstream portion of the plug body. A gas plug comprising: a connecting portion provided on an inner wall of the plug main body for connection; and a gas stopper capable of opening and closing the gas flow passage by attaching / detaching a gas connector to / from a downstream portion of the plug main body The feature of the present invention is that the fuse mechanism has a fuse valve that is movable between an initial position that allows gas flow in the gas flow passage and an operating position that blocks gas flow, upstream of the gas plug. An upstream portion of the fuse mechanism protrudes from the downstream end of the connecting portion toward the upstream end of the connecting portion, and is configured to be freely inserted into the gas pipe connected to the connecting portion. And the work Both position and said initial position lies in that will be set in the upstream end side of the connecting portion than the downstream side end portion of the connecting portion.

According to this configuration, the fuse mechanism has a fuse valve that is movable between an initial position that allows gas flow in the gas flow passage and an operating position that blocks gas flow, upstream of the gas plug. Since the upstream portion of the fuse mechanism protrudes toward the upstream end of the connecting portion rather than the downstream end of the connecting portion, the fuse mechanism is connected to the downstream end of the connecting portion. The part projecting to the upstream end side of the fuse part is located inside, the connection part is located outside the part projecting the fuse mechanism, and the projecting part of the fuse mechanism and the connection part are in gas flow It can be a double structure that overlaps in direction. Therefore, since the fuse mechanism can be arranged so as to have such a double structure, the length of the gas plug in the gas flow direction can be shortened. In addition, the fuse mechanism is inserted into the gas pipe connected to the connection portion , and both the operating position and the initial position are upstream end portions of the connection portions rather than the downstream end portions of the connection portions. Runode is set to the side, also be arranged a fuse mechanism so that there is the portion where the fuse mechanism and the connecting portion overlap in the gas flow direction, to connect the gas pipe to the connecting portion, the fuse mechanism is disturbed in The gas pipe can be connected to the connecting portion without becoming. Accordingly, it is possible to realize a gas plug in which the length of the gas flow direction is kept short, and it is possible to easily connect the gas pipe to the connection portion.

Claims (7)

To connect a gas pipe to a tubular plug body in which a gas flow passage is formed, a fuse mechanism for preventing excessive gas outflow in the gas flow passage, and an upstream portion of the plug body In a gas plug provided with a connection portion provided on the inner wall of the plug body,
The gas plug is configured such that the fuse mechanism protrudes from the downstream end portion of the connection portion toward the upstream end portion side of the connection portion and can be inserted into the gas pipe connected to the connection portion.   When the connection portion and the gas pipe are connected, the fuse mechanism and the connection portion are arranged so that a predetermined space is generated between the outer peripheral surface of the fuse mechanism and the inner peripheral surface of the gas pipe. The gas plug according to claim 1.   In the fuse mechanism, the upstream portion in the gas flow direction of the gas flow passage is located closer to the upstream end portion of the connection portion than the downstream end portion of the connection portion, and the downstream portion of the connection portion is The gas plug according to claim 1, wherein the gas plug is disposed so as to be located downstream of the downstream end portion, and a downstream portion of the fuse mechanism is held by an inner wall of the plug body.   4. The gas plug according to claim 3, wherein the fuse mechanism has an upstream end portion of the upstream portion disposed on the same plane as the upstream end portion of the plug body.   The gas plug according to any one of claims 1 to 4, wherein a connecting portion-side screw portion that is screwed into a gas pipe-side screw portion formed on an outer peripheral portion of the gas pipe is provided as the connecting portion.   The gas plug according to any one of claims 1 to 5, wherein a flexible pipe joint part that allows a flexible pipe used as the gas pipe to be detachable from the connection part is provided as the connection part.   The gas plug according to any one of claims 1 to 5, wherein the gas flow passage is provided in a straight line shape along an axial direction of the plug body.

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