JP2018062957A - Gas cock removing jig and method for removing gas cock using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cock removing jig that can reduce the size thereof in transportation but can suppress an amount of a gas flowing out to the outside which occurs at the time of operation, and to provide a method for removing a gas cock using the same.SOLUTION: In a removal readiness state where a gas cock 40 is brought into a closed state and a secondary-side gas pipe is removed from the gas cock 40, the other end of an elastic cylindrical member 30 includes an annular other end part 32 that is connected to an outer diameter part of a tip-side end part 44 of the gas cock 40 in an airtight manner while taking a folded back posture and being elastically deformed in a ring radial direction.SELECTED DRAWING: Figure 2

Description

  In the present invention, the proximal end is connected to the primary gas pipe and the distal end is connected to the secondary gas pipe, and the gap between the primary gas pipe and the secondary gas pipe is The present invention relates to a gas plug removal jig for removing a gas plug to be switched between an open state and a closed state from the primary side gas pipe, and a gas plug removal method using the same.

Conventionally, between the primary gas pipe and the secondary gas pipe is closed and closed with the proximal end connected to the primary gas pipe and the distal end connected to the secondary gas pipe. A no-blow bag is known as one used when a gas plug to be switched to a state is removed and replaced (see Patent Document 1). The no-blow bag has a first opening through which piping and the like can be inserted while maintaining the airtightness between the outside and the inside, and the operator's arm inside while maintaining the airtightness between the outside and the inside. And a second opening that can be inserted into the housing.
When the gas plug is removed and replaced using the no-blow bag, first, the gas plug is maintained in a closed state, and the secondary side gas pipe is detached from the tip end portion of the gas plug. After that, the primary side gas pipe is inserted into the first opening so that the gas side and the primary side gas pipe in the vicinity of the base end side end of the gas stopper are contained inside, and a no blow bag is installed. To do. In the installation state, an operator inserts an arm into the inside through the second opening, and performs a gas stopper removal operation and a new gas stopper attachment operation.
As a result, even when the gas plug is removed from the primary side gas pipe, the gas does not flow out of the no-blow bag. Can be executed.

On the other hand, as shown in FIGS. 4 and 5, a dedicated jig for removing and replacing the gas stopper is known. Hereinafter, based on FIG. 4, 5, after explaining the gas stopper 40 and the primary side gas pipe 50, a dedicated jig | tool is demonstrated.
As shown in FIGS. 4A and 4B, the gas plug 40 has a proximal end 45 (an end in the direction opposite to the arrow X in FIG. 4) connected to the primary gas pipe 50, With the tip end 44 (the end in the direction of arrow X in FIG. 4) connected to a secondary gas pipe (not shown), the primary gas pipe 50 and the secondary gas pipe It can be switched between an open state and a closed state.
When the description is added, the gas plug 40 is configured so that the gas plug main body 43 provided with an opening 43a therein and the hole axis of the opening 43a along the tube axis of the primary side gas pipe 50 and the secondary side gas pipe. And a gas cock 41 that switches between a closed state in which the hole axial center of the opening 43a is perpendicular to the tube axis of the primary side gas pipe 50 and the secondary side gas pipe. Further, a female screw portion 44 a is threaded at an inner diameter portion of the distal end side end portion 44, and a female screw portion 45 a is threaded at an inner diameter portion of the proximal end side end portion 45. A male screw portion (not shown) provided at an outer diameter portion of the end portion of the secondary side gas pipe (not shown) is screwed to the portion 44a, and a female screw portion 45a of the base end side end portion 45 is connected. The male screw part 50a provided in the outer diameter site | part of the edge part of the primary side gas pipe 50 is screwed together.

The special jig has a cylindrical shape made of resin or the like whose one end (the end in the direction indicated by the arrow X in FIG. 4) is open and the other end (the end in the direction indicated by the arrow X in FIG. 4) is closed. A member 60, a gas pumping nozzle 10 that pumps gas from a base end (end in the direction of arrow X in FIG. 4) to a tip end (end in the direction opposite to arrow X in FIG. 4), An open end is fixed to the tip of the gas pressure nozzle 10 in an airtight manner, and a stretchable bag 20 that hermetically seals the gas from the tip of the gas pressure nozzle 10 inside.
When the description is added, the cylindrical member 60 has a male screw portion 60c threaded at the outer diameter portion at one end and a male screw portion 60b threaded at the outer diameter portion at the other end, and the outer diameter portion at the other end. A lid member 61 having a female screw portion 61b that is screwed into the male screw portion 60b is provided. Further, a first insertion hole 60 a is provided at the other end of the cylindrical member 60, a second insertion hole 61 a is provided at the lid member 61, and a lid member 61 is provided at the male screw portion 60 b at the other end of the cylindrical member 60. The above-described gas pressure nozzle 10 can be inserted into the first insertion hole 60 a of the tubular member 60 and the second insertion hole 61 a of the lid member 61 in a state where the female screw portion 61 b is screwed.
Inside the other end of the cylindrical member 60, the first insertion hole of the cylindrical member 60 is in a state where the female screw portion 61b of the lid member 61 is screwed into the male screw portion 60b of the other end of the cylindrical member 60. In order to prevent gas from flowing through the first insertion hole 60a and the second insertion hole 61a when the gas pressure feeding nozzle 10 is inserted through the second insertion hole 61a of the cover member 61 and 60a, The sealing member 62 is disposed.

Further, as shown in FIG. 5C, the base end portion of the gas pressure nozzle 10 measures the pressure of the gas to be pumped and the gas pressure pump 14 for manually pumping outside air via the coupler 11. The pressure gauge 13 to be displayed is configured to be connectable.
Incidentally, the gas pressure pump 14 is operated by operating an operating screw to allow gas flow from the gas pressure pump 14 to the gas pressure nozzle 10 and to allow gas flow from the gas pressure nozzle 10 to the gas pressure pump 14. An air release valve 15 is provided to switch between a prohibited backflow prevention state and a gas flow state allowing gas flow between the gas pressure pump 14 and the gas pressure nozzle 10.

Hereinafter, description is added about the process of removing the gas stopper 40 using the said exclusive jig | tool.
First, as shown in FIG. 5 (a), the gas cock 41 is operated to close the gas stopper 40 and the secondary gas pipe (not shown) is removed from the gas stopper 40.
Next, as shown in FIG. 5B, the distal end portion of the gas pressure nozzle 10 to which the stretchable bag 20 is fixed is positioned inside the cylindrical member 60, and the first insertion of the cylindrical member 60 is performed. With the gas pressure feed nozzle 10 positioned in the hole 60 a and the second insertion hole 61 a of the lid member 61, the male screw portion 60 c at one end of the tubular member 60 is replaced with the female screw portion 44 a at the tip end portion 44 of the gas plug 40. Threadedly connected. Thereby, even if the gas stopper 40 is switched from the closed state to the open state, the gas from the upstream side of the primary side gas pipe 50 is prevented from flowing out to the outside.
Therefore, as shown in FIG. 5 (c), the gas stopper 40 is switched from the closed state to the opened state so that the stretchable bag 20 fixed to the distal end portion of the gas pressure nozzle 10 is opened. It moves to the inside of the primary side gas pipe 50 via 43a.
Further, a gas pressure pump 14 and a pressure gauge 13 are connected to the base end portion of the gas pressure nozzle 10 via a coupler 11, and the gas pressure pump 14 is operated with the air release valve 15 in a backflow prevention state. The primary side gas pipe 50 is configured in such a manner that gas is pumped into the stretchable bag-like bag 20 through 10, the stretchable bag-like bag 20 is inflated, and the outer surface thereof is in close contact with the pipe inner surface of the primary side gas pipe 50. Close.
Thereafter, as shown in FIG. 5 (d), the gas pressure pump 14 and the pressure gauge 13 are removed from the proximal end portion of the gas pressure nozzle 10, and the cylindrical member 60 and the lid member 61 are connected to the distal end of the gas plug 40. After removing from the part 44, the gas stopper 40 is removed from the primary side gas pipe 50, as shown in FIG.5 (e).
Incidentally, even after the gas pressure pump 14 and the pressure gauge 13 are removed from the base end portion of the gas pressure nozzle 10 and the tubular member 60 and the lid member 61 are removed from the front end side end portion 44 of the gas plug 40, the elastic bag. The coupler 11 having a function of preventing the backflow of gas from the bag 20 is connected to the base end portion of the gas pressure nozzle 10.
When the removed gas plug 40 is replaced with a new gas plug 40, the female screw portion 45 a of the base end side end portion 45 of the new gas plug 40 is screwed into the male screw portion 50 a of the primary gas pipe 50. Complete the replacement work.

JP 2004-52864 A

When the gas plug is removed and replaced using the above-mentioned no-blow bag, at least the gas filled in the no-blow bag flows out, so when working with a relatively large-capacity no-blow bag, the outflow amount There was also room for improvement.
In addition, the operator's arm inserted through the second opening of the no-blow bag has a problem that gas leakage occurs when the arm is pulled out from the second opening. For this reason, for example, when it is necessary to pull out the arm from the second opening, for example, when the user forgets to put a tool in the no-blow bag, gas leakage must be generated.
On the other hand, when the gas plug is removed and replaced using a dedicated jig, as shown in FIG. 5C, the inner space K formed in the cylindrical member 60 of the dedicated jig has a relatively large capacity. Since the gas that stays flows out to the outside, there is room for improvement.

  The present invention has been made in view of the above-described problems, and the object thereof is, in particular, a gas stopper capable of suppressing the outflow amount of gas generated during operation to the outside while being able to be made compact during transfer. It is in the point which provides the removal jig | tool and the gas stopper removal method using the same.

The gas stopper removal jig to achieve the above purpose is
Equipped with a gas-feeding nozzle that pumps gas from the base end to the tip,
With the proximal end connected to the primary gas pipe and the distal end connected to the secondary gas pipe, the primary gas pipe and the secondary gas pipe are opened and closed. A gas stopper removal jig for removing a gas stopper to be switched to a state from the primary side gas pipe, the characteristic configuration of which is
An elastic bag-like bag in which an opening end portion is hermetically fixed to the tip portion of the gas pressure nozzle and gas from the tip portion of the gas pressure nozzle is hermetically sealed inside,
One end is airtightly fixed to the gas feeding nozzle and the other end is provided with a stretchable tubular member,
The stretchable cylindrical member is configured to be capable of maintaining a folded posture in which the one end side cylindrical portion including the one end is set inside and the other end side cylindrical portion including the other end is set outside and folded.
In the preparation for removal in which the gas stopper is in the closed state and the secondary gas pipe is removed from the gas stopper,
The other end of the elastic tubular member has an annular other end portion that is airtightly connected to the outer diameter portion of the distal end side end portion of the gas stopper in the folded-back posture and in the form of elastic deformation in the annular diameter direction. In the point.

According to the above characteristic configuration, the gas stopper removing jig is constituted by the gas pressure feeding nozzle, the stretchable bag-like bag, and the stretchable tubular member, so for example, the stretchable bag-like bag and the stretchable tubular member. Since both of them are made of a stretchable material (for example, nitrile rubber, butyl rubber, latex), it can be folded, so that it can be made more compact than a dedicated jig made of a conventional resin or the like.
Further, in the preparation for removal, the outer end of the gas stopper is hermetically sealed at the other end of the elastic tubular member in the folded-back posture of the elastic cylindrical member and elastically deformed in the radial direction. Since the annular other end connected to the gas stopper is provided, the distal end of the gas plug can be isolated from the outside in an airtight manner. As a result, when the gas stopper is moved from the closed state to the open state in order to insert the stretchable bag-like bag into the primary side gas pipe, the gas inside the primary side gas pipe flows out to the outside. Can be prevented.
Furthermore, since the stretchable cylindrical member is made of a stretchable material, the stretchable tubular member is pressed from the outside to push the gas inside the stretchable tubular member back into the pipe of the primary side gas pipe. After that, the stretchable bag-like bag can be inflated inside the primary side gas pipe to close the primary side gas pipe. In this way, with the amount of gas existing on the secondary side of the expanded elastic bag-like bag sufficiently reduced, the annular other end of the elastic cylindrical member is removed from the end of the gas stopper, and the gas Since the plug can be removed from the primary gas pipe, the amount of gas flowing out to the outside can be made sufficiently small.
As a result, it is possible to realize a gas stopper removal jig that can suppress the outflow amount of gas generated during work to the outside, while being able to reduce the size particularly during transfer.

Further features of the gas stopper removal jig
The stretchable cylindrical member has a shape that gradually increases in diameter from the one end side toward the other end side in a natural state that is not in the folded position and is not stressed from the outside. is there.

  According to the above characteristic configuration, the stretchable tubular member can be folded back satisfactorily in a state where a gap is formed between the one end side tubular portion and the other end side tubular portion of the stretchable tubular member. The operability of the transition operation from the natural state of the shaped member to the folded posture can be improved.

Further features of the gas stopper removal jig
There exists an annular fastening member which fastens and fixes both the said opening end part of the said elastic bag-like bag, and the said one end of the said elastic cylindrical member to the said gas pumping nozzle from the outer side.

  According to the above characteristic configuration, both the opening end of the stretchable bag and the one end of the stretchable tubular member can be fastened and fixed to the gas pressure nozzle with one annular fastening member, so that both are fixed separately. Compared to the case, the configuration can be simplified and the fastening and fixing operation can be simplified.

Further features of the gas stopper removal jig
The stretchable bag and the stretchable tubular member are integrally formed with the opening end of the stretchable bag and the one end of the stretchable tubular member being continuous. There is in point.

According to the above characteristic configuration, the stretchable bag-shaped bag and the stretchable cylindrical member are integrally formed, so that the number of parts can be reduced and the economy can be improved, and both are configured by separate members. Compared with the case where it does, the work process at the time of installation can be reduced and workability | operativity can be improved.
In addition, by configuring both the elastic bag-like bag and the elastic cylindrical member with the same material, further cost saving can be realized, and economic efficiency can be improved.

Further features of the gas stopper removal jig
The elastic coefficient of the annular other end of the elastic tubular member is configured to be larger than the elastic coefficient of other parts of the elastic cylindrical member,
In a natural state in which no stress is applied from the outside, the inner diameter of the other annular end is configured to be smaller than the outer diameter of the end on the distal end side of the gas plug.

According to the above characteristic configuration, the transition of the stretchable tubular member from the natural state to the folded posture can be performed with a relatively small force.
Further, the other annular end of the stretchable cylindrical member is realized by its relatively high elastic force without using any other fastening member or the like when airtightly fixing to the distal end side end of the gas stopper. be able to.

Gas stopper removal jig
The elastic bag-like bag is configured to be inflatable by gas being fed from the gas feeding nozzle in a state of being inserted into the primary side gas pipe,
It is preferable that the outer surface of the inflatable bag is in close contact with the inner surface of the primary gas tube to close the primary gas tube.

The characteristic configuration of the gas stopper removal method using the above-mentioned gas stopper removal jig is as follows:
In the removal preparation posture, an airtight connection step of making the stretchable tubular member in the folded posture and airtightly connecting the annular other end portion to an outer diameter portion of the distal end side end portion of the gas stopper;
An opening step of switching the gas stopper from the closed state to the open state;
An insertion step of inserting the elastic bag-like bag into the primary gas pipe through the gas stopper;
A closing step of closing the primary gas pipe by inflating the elastic bag-like bag by enclosing a gas inside the elastic bag-like bag with the gas pressure nozzle;
The removal step of removing the gas stopper from the primary gas pipe is performed in the order described.

  According to the gas stopper removal method having the above-described characteristic configuration, it is possible to achieve substantially the same operational effects as the above-described gas stopper removal jig.

Further features of the gas stopper removal method are:
Before the inflating bag is inflated, the closing step pushes the elastic tubular member from the outside to extrude the gas inside the elastic tubular member toward the primary side gas pipe. In the point including processing.

  According to the above characteristic configuration, before inflating the elastic bag-like bag, in the closing step, the elastic cylindrical member is pressed from the outside to direct the gas inside the elastic cylindrical member toward the primary side gas pipe. Since the extrusion process is performed, the amount of gas flowing out to the outside can be made sufficiently small in the subsequent removal process.

Schematic configuration diagram of the gas stopper removal jig The figure which shows the process of removing a gas stopper with a gas stopper removal jig The figure which shows the process of removing a gas stopper with a gas stopper removal jig The figure which shows the process of removing a gas stopper with the conventional special jig The figure which shows the process of removing a gas stopper with the conventional special jig

The gas stopper removal jig 100 and the gas stopper removal method using the same according to the embodiment of the present invention are particularly capable of downsizing at the time of transfer, while the gas generated at the time of operation is transferred to the outside. It relates to what can control the outflow.
Hereinafter, prior to the description of the gas stopper removal jig 100 according to this embodiment, a configuration relating to the gas stopper 40 will be described.

The gas plug 40 switches a gas pipe that flows through the city gas 13A and the like between a closed state and an open state. As shown in FIGS. 2A and 2B, the gas stopper 40 has a proximal end 45 (an end in the direction opposite to the arrow X in FIG. 2) connected to the primary gas pipe 50. The primary side gas pipe 50, the secondary side gas pipe, and the tip side end part 44 (the end part in the direction indicated by the arrow X in FIG. 2) are connected to a secondary side gas pipe (not shown). It can be switched between an open state and a closed state.
When the description is added, the gas plug 40 is configured so that the gas plug main body 43 provided with an opening 43a therein and the hole axis of the opening 43a along the tube axis of the primary side gas pipe 50 and the secondary side gas pipe. And a gas cock 41 that switches between a closed state in which the hole axial center of the opening 43a is perpendicular to the tube axis of the primary side gas pipe 50 and the secondary side gas pipe. Further, a female screw portion 44 a is threaded at an inner diameter portion of the distal end side end portion 44, and a female screw portion 45 a is threaded at an inner diameter portion of the proximal end side end portion 45. A male screw portion (not shown) provided at an outer diameter portion of the end portion of the secondary side gas pipe (not shown) is screwed to the portion 44a, and a female screw portion 45a of the base end side end portion 45 is connected. The male screw part 50a provided in the outer diameter site | part of the edge part of the primary side gas pipe 50 is screwed together.

  As shown in FIGS. 1 to 3, the gas stopper removal jig 100 according to the embodiment uses a gas (for example, air) outside the primary side gas pipe 50 and the secondary side gas pipe as a base end part (FIG. 1). -3, a gas-feeding nozzle 10 for pumping from the end portion in the direction indicated by the arrow X to the tip portion 10a (the end portion in the direction opposite to the arrow X in FIGS. 1 to 3) is provided, and the open end portion (FIG. 1). -3, the end portion in the direction indicated by the arrow X) is airtightly fixed to the distal end portion 10a of the gas pressure nozzle 10 and gas from the distal end portion 10a of the gas pressure nozzle 10 is hermetically sealed inside. The bag 20 and one end (the end in the direction opposite to the arrow X in FIGS. 1 to 3) are hermetically fixed to the gas pumping nozzle 10 and the other end (in the direction indicated by the arrow X in FIGS. 1 to 3). And an elastic tubular member 30 whose end portion is open.

In the present embodiment, the stretchable bag 20 and the stretchable tubular member 30 are integrally formed with the opening end of the stretchable bag 20 and one end of the stretchable tubular member 30 being continuous. Is formed. Furthermore, both can be comprised from the material which has a stretching property, For example, a nitrile rubber, a butyl rubber, and latex can be employ | adopted.
Incidentally, both the opening end part of the elastic bag-like bag 20 and one end of the elastic cylindrical member 30 are located at the outer diameter portion of the fitting member 16 fitted to the gas pumping nozzle 10 from the outside. It is fastened and fixed by an annular fastening member 17 such as a binding band.

The elastic tubular member 30 has a shape that gradually increases in diameter from one end side to the other end side in a natural state where no external stress is applied (for example, the state shown in FIG. 2A). In the present embodiment, the stretchable tubular member 30 has the one end side cylindrical portion 30a including one end having a substantially the same diameter, and the other end side cylindrical portion 30b including the other end from the other end side. The diameter gradually increases toward the end side.
Further, the stretchable cylindrical member 30 is configured to be able to maintain a folded posture (for example, the posture shown in FIG. 2B) that is folded with the one end side cylindrical portion 30a inside and the other end side cylindrical portion 30b facing outside. When the gas stopper 40 is closed and the secondary side gas pipe (not shown) is removed from the gas stopper 40 (for example, the attitude shown in FIG. 2 (a)), The other end of the member 30 has an annular other end portion 32 that is airtightly connected to the outer diameter portion of the front end side end portion 44 of the gas plug 40 in a folded posture and elastically deforming in the annular radial direction.
Here, in the folded posture, an internal space K is formed between the one end side cylindrical portion 30a and the other end side cylindrical portion 30b of the stretchable cylindrical member 30.
In the above-described removal preparation posture, it is preferable that the axis of the gas pumping nozzle 10 and the tube axis of the primary gas pipe 50 are arranged on the same straight line.

  In this embodiment, the elastic coefficient of the annular other end portion 32 of the elastic cylindrical member 30 is configured to be larger than the elastic coefficient of other parts of the elastic cylindrical member 30, and stress is applied from the outside. In an unnatural state, the inner diameter of the annular other end 32 is configured to be smaller than the outer diameter of the distal end 44 of the gas plug 40. With this configuration, in the state shown in FIG. 2 (b), the annular other end portion 32 is extended in the radial direction, and is elastically applied to the outer diameter portion of the distal end side end portion 44 of the gas plug 40. It will be connected airtight.

As shown in FIG. 3C, a gas pump 14 for manually pumping outside air and the pressure of the pumped gas are measured and displayed at the base end of the gas pump nozzle 10 as shown in FIG. A pressure gauge 13 is connected.
Incidentally, the gas pressure pump 14 is operated by operating an operating screw to allow gas flow from the gas pressure pump 14 to the gas pressure nozzle 10 and to allow gas flow from the gas pressure nozzle 10 to the gas pressure pump 14. An air release valve 15 is provided to switch between a prohibited backflow prevention state and a gas flow state allowing gas flow between the gas pressure pump 14 and the gas pressure nozzle 10.
As shown in FIG. 3C, the stretchable bag-like bag 20 is inserted into the primary gas pipe 50, and when the air release valve 15 is in the backflow prevention state, the gas is pumped from the gas pumping nozzle 10. Thus, the primary surface gas pipe 50 is closed in such a manner that the outer surface of the inflatable elastic bag 20 is in close contact with the inner surface of the primary side gas pipe 50.
Hereinafter, a method for removing the gas stopper 40 using the gas stopper removing jig 100 will be described in detail.

In the method of removing the gas stopper 40 according to the embodiment, first, as shown in FIG. 2A, the gas stopper 40 is closed and a secondary gas pipe (not shown) is connected from the gas stopper 40. The detachable preparation is prepared, and the stretchable bag 20 is disposed at a position facing the distal end 44 of the gas stopper 40.
Thereafter, as shown in FIG. 2B, the elastic tubular member 30 is turned to the folded position, and the annular other end 32 is hermetically connected to the outer diameter portion of the distal end portion 44 of the gas plug 40. Execute the process. After the airtight connection step, a gas pressure feed pump 14 for manually pressure-feeding outside air to the base end portion of the gas pressure feed nozzle 10 via a coupler 11, and a pressure gauge 13 for measuring and displaying the pressure of the pressure-fed gas. And connect.
Next, as shown in FIG. 3 (c), an opening process for switching the gas plug 40 from the closed state to the open state is performed, and the stretchable bag 20 is connected to the primary side gas pipe 50 through the gas plug 40. And an insertion process of inserting into the inside. Incidentally, in the tube axis direction of the primary gas pipe 50 (the direction along the arrow X in FIG. 3), the insertion position of the stretchable bag 20 is in the vicinity of the connection portion between the primary gas pipe 50 and the gas plug 40. In other words, the position is superimposed on both screwed portions. Thereby, after removing the gas stopper 40, the amount of gas flowing out is reduced.
Further, as shown in FIG. 3 (d), the stretchable tubular member 30 is pressed from the outside to direct the gas present in the internal space K of the stretchable tubular member 30 toward the inside of the primary gas pipe 50. After performing the extrusion process to extrude, the gas pressure pump 14 is operated with the air release valve 15 in the backflow prevention state, the gas is sealed inside the stretchable bag 20 by the gas feed nozzle 10, and the stretchable bag 20 Is closed to close the primary side gas pipe 50.
Thereafter, in order to prevent the outflow of gas from the elastic bag-like bag 20, the gas pressure feed pump 14 for manually feeding outside air from the base end portion of the gas pressure feed nozzle 10 leaving the coupler 11 having a backflow prevention function. And the pressure gauge 13 that measures and displays the pressure of the gas to be pumped is removed. Further, the other annular end 32 of the elastic tubular member 30 is removed from the distal end 44 of the gas stopper 40.
Finally, as shown in FIG. 3 (e), the screwing of the female screw portion 45a of the base end side end portion 45 of the gas plug 40 and the male screw portion 50a of the primary side gas pipe 50 is released, and the gas plug The removal process which removes 40 from the primary side gas pipe 50 is performed.

  In addition, after performing the removal method of the said gas stopper 40 and removing the gas stopper 40, the base end side edge part 45 of the new gas stopper 40 is screw-connected to the male screw part 50a of the primary side gas pipe 50. Thereby, the gas stopper 40 can be replaced | exchanged favorably.

[Another embodiment]
(1) In the above embodiment, the stretchable bag 20 and the stretchable tubular member 30 are configured such that the open end of the stretchable bag 20 and one end of the stretchable tubular member 30 are continuous. Thus, an example of a configuration that is integrally formed is shown.
However, the stretchable bag 20 and the stretchable tubular member 30 may be configured separately. Furthermore, the fixing position of the stretchable bag 20 and the fixing position of the stretchable tubular member 30 may be separated from each other in the axial direction of the gas pressure nozzle 10.
The stretchable bag 20 and the stretchable tubular member 30 may be made of different materials.

(2) In the above embodiment, the stretchable tubular member 30 is directed from one end side to the other end side in a natural state (for example, the state shown in FIG. 2A) where no stress is applied from the outside. The structural example which has the shape which expands gradually is shown.
However, the stretchable cylindrical member 30 is in a removal preparation state, the stretchable cylindrical member 30 maintains the folded posture, and the annular other end 32 of the stretchable tubular member 30 is at the distal end of the gas plug 40. Any shape can be used as long as the gas inside the primary side gas pipe 50 can be prevented from flowing out to the outside in a state where the portion 44 is airtightly connected to the outer diameter portion.

(3) In the above embodiment, the elastic coefficient of the annular other end 32 of the elastic tubular member 30 is configured to be larger than the elastic coefficient of other parts of the elastic cylindrical member 30, and from the outside. In the natural state where no stress is applied, the inner diameter of the annular other end 32 is configured to be smaller than the outer diameter of the distal end 44 of the gas plug 40.
The elastic coefficient of the annular other end portion 32 of the elastic tubular member 30 may be the same as the elastic coefficient of other portions of the elastic cylindrical member 30.
Further, in a natural state in which no stress is applied from the outside, the inner diameter of the annular other end portion 32 may be configured to be larger than the outer diameter of the distal end portion 44 of the gas plug 40.
In this case, it is preferable to adopt a configuration in which the annular other end portion 32 is airtightly connected to the outer diameter portion of the distal end side end portion 44 of the gas plug 40 in a form of fastening from the outside by a fastening member or the like.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

  The gas stopper removal jig and the gas stopper removal method using the same according to the present invention can suppress the outflow amount of gas generated during operation to the outside while being able to achieve compactness at the time of transfer. The present invention can be effectively used as a gas stopper removing jig and a gas stopper removing method using the jig.

DESCRIPTION OF SYMBOLS 10: Gas pumping nozzle 10a: Front-end | tip part 17: Ring-shaped fastening member 20: Stretchable bag-shaped bag 30: Stretchable tubular member 30a: One end side cylinder part 30b: Other end side cylinder part 32: Ring other end part 40: Gas Plug 41: Gas cock 44: End side end 45: Base end side 50: Primary side gas pipe 60: Tubular member 100: Gas stopper removal jig

Claims (8)

Equipped with a gas-feeding nozzle that pumps gas from the base end to the tip,
With the proximal end connected to the primary gas pipe and the distal end connected to the secondary gas pipe, the primary gas pipe and the secondary gas pipe are opened and closed. A gas stopper removal jig for removing a gas stopper to be switched to a state from the primary side gas pipe,
An elastic bag-like bag in which an opening end portion is hermetically fixed to the tip portion of the gas pressure nozzle and gas from the tip portion of the gas pressure nozzle is hermetically sealed inside,
One end is airtightly fixed to the gas feeding nozzle and the other end is provided with a stretchable tubular member,
The stretchable cylindrical member is configured to be capable of maintaining a folded posture in which the one end side cylindrical portion including the one end is set inside and the other end side cylindrical portion including the other end is set outside and folded.
In the preparation for removal in which the gas stopper is in the closed state and the secondary gas pipe is removed from the gas stopper,
The other end of the elastic tubular member has an annular other end portion that is airtightly connected to the outer diameter portion of the distal end side end portion of the gas stopper in the folded-back posture and in the form of elastic deformation in the annular diameter direction. Gas stopper removal jig.   The stretchable cylindrical member has a shape that gradually expands from the one end side to the other end side in a natural state that is not in the folded position and is not stressed from the outside. The gas stopper removing jig according to 1.   The gas stopper according to claim 1 or 2, further comprising an annular fastening member that fastens and fixes both the opening end portion of the stretchable bag-like bag and the one end of the stretchable tubular member to the gas pressure nozzle from the outside. Removal jig.   The stretchable bag and the stretchable tubular member are integrally formed with the opening end of the stretchable bag and the one end of the stretchable tubular member being continuous. The gas stopper removing jig according to any one of claims 1 to 3. The elastic coefficient of the annular other end of the elastic tubular member is configured to be larger than the elastic coefficient of other parts of the elastic cylindrical member,
5. The inner diameter of the annular other end portion is configured to be smaller than the outer diameter of the distal end side end portion of the gas stopper in a natural state in which no stress is applied from the outside. The gas stopper removing jig described in 1. The elastic bag-like bag is configured to be inflatable by gas being fed from the gas feeding nozzle in a state of being inserted into the primary side gas pipe,
The gas stopper removal according to any one of claims 1 to 5, wherein the outer surface of the inflated elastic bag-like bag closes the primary side gas pipe in a form in close contact with the inner surface of the primary side gas pipe. jig. It is a gas stopper removal method using the gas stopper removal jig as described in any one of Claims 1-6, Comprising: In the said preparations for removal, the said elastic cylindrical member is made into the said folding | turning attitude | position. And an airtight connection step of airtightly connecting the annular other end portion to an outer diameter portion of the distal end side end portion of the gas stopper,
An opening step of switching the gas stopper from the closed state to the open state;
An insertion step of inserting the elastic bag-like bag into the primary gas pipe through the gas stopper;
A closing step of closing the primary gas pipe by inflating the elastic bag-like bag by enclosing a gas inside the elastic bag-like bag with the gas pressure nozzle;
A gas stopper removal method for executing the removal step of removing the gas stopper from the primary side gas pipe in the order described.   Before the inflating bag is inflated, the closing step pushes the elastic tubular member from the outside to extrude the gas inside the elastic tubular member toward the primary side gas pipe. The gas stopper removing method according to claim 7, comprising a treatment.

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