JP3794676B2 - Unused supply pipe closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, for example, after a gas supply pipe that is buried in the ground of a road, for example, branched from a gas main branch pipe and drawn into the residential land becomes unused and cut near the boundary of the residential land, for example, when the house is demolished The present invention relates to a closing device for blocking gas from inadvertently leaking to the outside from a supply pipe that has not been used (this is called an unused supply pipe). The present invention relates to a closing device for a non-use supply pipe, which is composed of a closing part for supplying the same and a feeding pipe for sending the closing part to a predetermined position in the non-use supply pipe (inner depth as close as possible to this branch pipe).
[0002]
[Prior art]
It is desirable that unused supply pipes be cut off near the residential land boundary, then excavated on the road, and then removed separately from the main pipes buried in the road. However, due to the cost of removal, etc. Often not removed. Therefore, in order to prevent gas leakage from the unused supply pipe due to natural deterioration or breakage due to other construction such as water pipes, etc., a blocking part for closing the unused supply pipe in a state where the road is excavated is in place. It is desired that the blockage process be carried out by feeding to the end.
[0003]
However, as shown in FIG. 4, after the rubber bag (blocking part) a is fed into the non-use supply pipe A, the rubber bag a is inflated with air supplied from the air sealing pipe b and is not used. In the conventional unused supply pipe closing device that closes the supply pipe A, it is difficult to feed the rubber bag (closing part) a to a predetermined position in the unused supply pipe A because of its structure.
Therefore, an elastically deformable seal member (blocking part) formed in a circular cross section slightly smaller in diameter than the inner diameter of the unused supply pipe is sent to a predetermined position in the unused supply pipe with a feed rod, and then the seal member is A closing device has been proposed in which the unused supply pipe is closed by causing the sealing member to bulge and deform in the circumferential direction by being sandwiched from both sides.
However, in order to prevent gas from leaking to the outside between the time when the closing part (rubber bag or seal member) is inserted into the unused supply pipe and the unused supply pipe is closed, in either case of using the closing device. In addition, a sealing work bag D called a no-blow cover having an outflow prevention mechanism C is installed on the insertion port side A ′ of the unused supply pipe A, and an operator inserts his arm from the outflow prevention mechanism C. It was necessary to perform a blockage operation. In other words, while the unused supply pipe is closed, there is a risk that the gas in the unused supply pipe will flow out of the no-blow cover D, and the unused supply pipe is completely closed. Since the no-blow cover can only be removed after the operation, the no-blow cover obstructs the workability itself.
[0004]
[Problems to be solved by the invention]
In such a current situation, as a result of intensive studies by the present inventors, the gas to be leaked from the unused supply pipe cannot pass through the single foam sponge material having a hardness (Hvs) of 15 to 35, If such a material is inserted into the unused supply pipe, it is possible to prevent leakage of gas from the unused supply pipe at least until it is completely closed with a closing device for closing the unused supply pipe. As a result, the present invention was reached.
[0005]
A first object of the present invention is to insert a no-blow cover (sealing work bag), which has been necessary during the closing operation of an unused supply pipe in the prior art, at least into a closing part into the unused supply pipe. It is not necessary except during the interval, and after inserting the closing part into the unused supply pipe, the no blow cover can be removed, and the unused supply pipe can be closed easily and quickly. It is to provide a supply pipe closing device.
A second object of the present invention is to provide an unused supply pipe closing device capable of reliably sending and installing a closing part for closing an unused supply pipe to a predetermined position in the unused supply pipe. .
[0006]
[Means for Solving the Problems]
An unused supply pipe closing device of the present invention that achieves such an object comprises a closing part for closing the unused supply pipe and a feed rod for sending the closing part to a predetermined position in the unused supply pipe. A non-use supply pipe closing device, wherein the feed rod is composed of a first feed rod that is separably connected to the closure component and a second feed rod that is separably connected to the first feed rod. An engagement groove that is detachably engaged with an engagement pin projecting from a connection member of the closing part is formed on one end side of the first feeding rod, and the closing part connected to the engagement groove A resilient spring that presses the connecting member is provided, and the other end of the first feeding rod is slid in the axial direction with an engaging arm formed with an engaging step, and covers the outer periphery of the engaging step. A retaining cylinder is provided and is engaged with the retaining cylinder. Provided with a resilient spring that urges the retaining cylinder in a direction to cover the outer periphery of the engaging stepped portion, and the first feeding rod is provided at one end of the second feeding rod. The present invention is characterized in that a connecting arm formed with an engaging step portion that matches the engaging step portion of the provided engaging arm is provided .
At this time, the closing part surrounds the seal member by moving the seal member close to each other while sandwiching the seal member from both sides with an elastically deformable seal member having a circular cross section slightly smaller than the inner diameter of the unused supply pipe. A first and a second clamping member that bulges and deforms in the direction and comes into close contact with the inner peripheral surface of the unused supply pipe, and a leakage prevention board provided concentrically on both ends or one end of the seal member, It is desirable that the leakage prevention board is formed in a circular plate shape having a diameter slightly larger than the inner diameter of the unused supply pipe using a single foam sponge material having a hardness (Hvs) of 15 to 35 (Claim 2).
Moreover, it is preferable to form the other end side of said 2nd feeding rod similarly to the one end side of the 1st feeding rod. In other words, the other end side of the second feed rod is fitted with an engaging step portion of a connecting arm provided on one end side of another second feed rod so that another second feed rod can be separably connected. A connecting arm having an engaging step portion formed thereon, a retaining tube that slides in an axial direction and covers an outer periphery of the engaging step portion of the connecting arm, and the retaining tube and the connecting arm. It is preferable to provide a resilient spring that is interposed and biases the retaining cylinder in a direction covering the outer periphery of the engaging step portion of the connection arm.
Also, in order to prevent the feed rod from becoming long and bent in the middle, the unused supply pipe is provided between the first feed rod and the second feed rod or between the second feed rod and another second feed rod. It is preferable to provide a support ring formed in a circular ring shape slightly smaller in diameter than the inner diameter.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and various variations are conceivable.
The unused supply pipe closing device according to the present invention includes a closed part B for closing the unused supply pipe A, and a feed rod E for sending the closed part B to a predetermined position in the unused supply pipe A. Consists of
[0008]
The closing part B includes an elastically deformable seal member 1 having a circular cross section slightly smaller than the inner diameter of the unused supply pipe A, and the seal member 1 by causing the seal member 1 to approach each other by sandwiching the seal member 1 from both sides. Are formed concentrically on both ends or one end of the seal member 1 and the first and second sandwiching members 2 and 3 for causing the seal member to bulge and deform in the circumferential direction and closely contact the inner peripheral surface of the unused supply pipe A. The leakage prevention board 4 etc. are comprised.
[0009]
The seal member 1 is made of an elastically deformable rubber or the like, preferably a synthetic rubber excellent in weather resistance, more preferably a synthetic rubber material such as chloroprene rubber having a hardness Hs (JISA) of 40 or more, and is not supplied. The tube A has an appropriate length according to the inner diameter, and the outer diameter is formed so as to have a circular cross section slightly smaller than the inner diameter of the unused supply pipe A, and is easily bulged and deformed in the circumferential direction. A recess 11 having a circular cross section that opens to one end surface side is formed coaxially in the inside thereof, and the first clamping member 2 and the second clamping member 3 disposed on both sides thereof are moved closer to each other to thereby move the sealing member. 1 is formed to bulge and deform in the circumferential direction so as to be in close contact with the inner peripheral surface of the unused supply pipe A.
[0010]
Various mechanisms and configurations for causing the first clamping member 2 and the second clamping member 3 disposed on both sides of the sealing member 1 to move closer to each other to bulge and deform the sealing member 1 in the circumferential direction can be considered. However, the illustrated embodiment uses a screw motion.
That is, in the illustrated embodiment, the first clamping member 2 is engaged with a circular head 21 fitted into a rim step portion 12 of a recess 11 formed in an opening on one end surface side of the seal member 1 and this. The second clamping member 3 is formed in a substantially disk shape having substantially the same outer diameter as that of the circular head 21 of the first clamping member 2. The first clamping member 2 is concentrically disposed on one end surface side of the seal member 1 and the second clamping member 3 is concentrically disposed on the other end surface side of the seal member 1 to seal the screw rod 22 of the first clamping member 2. The member 1 passes through the recess 11 and protrudes loosely from the center of the second clamping member 3, and the connecting member 5 is screwed and connected to the tip of the screw rod 22 protruding from the second clamping member 3. It is configured. Accordingly, for example, by rotating the connecting member 5 in a forward direction (usually a direction in which a screw is tightened), the circular head 21 of the first clamping member 2 and the second clamping member 3 move closer to each other, and the seal The outer peripheral surface 12 of the member 1 bulges and deforms in the circumferential direction.
Reference numeral 6 in the figure is a slip washer that is interposed between the second clamping member 3 and the connecting member 5 to smooth the screw rotation of the connecting member 5, and has excellent slipperiness. It is formed in a ring shape with a resin material.
[0011]
The leakage prevention panel 4 is inserted into the unused supply pipe A together with the seal member 1 to prevent gas leakage in close contact with the inner peripheral surface of the unused supply pipe A, and is made of a material having flexible elasticity. The seal member 1 is formed in a circular plate shape slightly larger in diameter than the inner diameter of the unused supply pipe A, and is provided with both end sides or one end side of the seal member 1, in the illustrated embodiment, the second clamping member 3 is installed. One end side is provided concentrically with the seal member 1. The material of the leakage prevention panel 4 is a material having flexible elasticity, specifically, a rubber sponge material such as natural rubber, chloropyrene rubber, ethylene propylene rubber or nitrile rubber, preferably a single foam of chloropyrene rubber. A sponge material, more preferably a chloropyrene rubber-based single foam sponge material having a hardness (Hvs) of 15 to 35 is used. In this case, when the hardness (Hvs) is 15 or less, it is easily deformed, so that the shape retention is poor and the adhesion with the inner peripheral surface of the unused supply pipe A is deteriorated. Conversely, the hardness (Hvs) is 35. As described above, permanent deformation increases and the contact with the inner peripheral surface of the unused supply pipe A becomes worse, so that the effect of preventing gas leakage cannot be expected much.
The leakage prevention panel 4 is used for closing the closing part B (the first holding member 2 and the second holding member 3 are moved closer to each other to bulge and deform the seal member 1 in the circumferential direction). It also serves to prevent idling of the seal member 1 during the operation of tightly attaching the surface 12 to the inner peripheral surface of the unused supply pipe A).
[0012]
Thus, when the unused supply pipe A is closed, when the closed part B including the seal member 1, the first and second clamping members 2 and 3, the leakage prevention panel 4 and the like is inserted into the unused supply pipe A. The leakage prevention panel 4 is in close contact with the inner peripheral surface of the unused supply pipe A, and the unused supply pipe A is immediately closed, so that gas leakage from the unused supply pipe A is prevented for the time being. Therefore, in the subsequent closing operation, the no-blow cover (sealing operation bag) for preventing the gas from leaking to the outside may be removed.
Next, the closing part B is fed with a feed rod E to a predetermined inner depth of the unused supply pipe A, that is, to a predetermined position near the main branch pipe, and then the connecting member 5 is screwed via the feed rod E. When rotated, the leakage prevention panel 4 plays a role of preventing the seal member 1 from rotating freely, and the first clamping member 2 and the second clamping member 3 disposed on both sides of the sealing member 1 move closer to each other, and the sealing member 1 is bulged and deformed in the circumferential direction, and the outer peripheral surface 12 of the seal member 1 comes into close contact with the inner peripheral surface of the unused supply pipe A. As a result, the unused supply pipe A is tightly closed at a predetermined position close to the main branch pipe. After that, the unused supply pipe A is filled with the resin filler close to the closed part B in the same manner as in the past. To complete the blocking operation.
[0013]
Next, the feeding rod E according to the present invention will be described.
The feed rod E is composed of a first feed rod 7 that is separably connected to the closing component B and a second feed rod 8 that is separably connected to the first feed rod 7. Depending on the distance fed to a predetermined position in the use supply pipe A, another second feed rod 8 is detachably added to the second feed rod 8 and used.
[0014]
The first feeding rod 7 is formed to have a required length (for example, about 52 cm) using a metal or plastic hollow pipe material having excellent rigidity and light weight, and the closing part B can be separated at one end thereof. The second feeding rod 8 is detachably coupled to the other end side.
That is, at one end side of the first feeding rod 7, an engaging pin 51 protruding from the closing part B side, specifically, a screw rod 22 of the first clamping member 2 projecting loosely from the second clamping member 3 is provided. An engaging groove 71 is formed that is separably engaged with two engaging pins 51 projecting in a direction perpendicular to the axial direction to a connecting member 5 that is screwed and connected to a tip portion of the engaging member. In addition, a resilient spring 72 is provided for pressing the closing part B connected via the engagement groove 71 so as not to be detached from the engagement groove 71.
[0015]
The engagement groove 71 is formed in a substantially J shape along the axial direction from the end surface of the first feed rod 7 at a position corresponding to the engagement pin 51 projecting from the connecting member 5. Further, the elastic spring 72 is configured to move the connecting member 5 from the first feed rod 7 when the connecting member 5 protruding from the closing part B is engaged and connected to the engaging groove 71 via the engaging pin 51. It is energized in a direction to be separated in the axial direction, is formed in a substantially coil shape, and is installed in the axial direction in the vicinity of the engagement groove 71 inside one end side of the first feeding rod 7.
Reference numeral 73 in the drawing is a contact plate for improving the contact with the end face of the connecting member 5 and reliably transmitting the pressing force of the spring 72 to the connecting member 5.
[0016]
Thus, when the first feeding rod 7 is connected to the closing member B, as shown in detail in FIG. 2, one end of the first feeding rod 7 is engaged with the engaging pin 51 projecting from the connecting member 5 of the closing member B. The engaging groove 71 formed on the side is inserted, and the first feeding rod 7 is pushed toward the closing member B against the resilient force of the resilient spring 72. In this state, the first feeding rod 7 is pushed in the circumferential direction. Rotate a little to stop the pushing operation of the first feeding rod 7. Then, the engaging pin 51 is engaged with the bent back part 71a of the engaging groove 71, and the engaging pin 51 is pressed against the back part 71a of the engaging groove 71 by the urging force of the elastic spring 72, so that the closing member The connection state between B and the first feed rod 7 is maintained.
[0017]
On the other hand, on the other end side of the first feed rod 7 to which the second feed rod 8 is detachably connected, an engagement arm 75 formed with an engagement step 74 and an engagement arm that slides in the axial direction. A retaining cylinder 76 that covers the outer periphery of the 75 engaging step portions 74 is provided, and is disposed between the retaining tube 76 and the engaging arm 75 so that the retaining tube 76 is connected to the engaging step portion 74. An elastic spring 57 is provided for biasing the outer periphery of the spring in the direction in which it is covered.
[0018]
The engaging arm 75 is made of a solid metal or plastic round bar or square bar with excellent rigidity, and is fixedly projected so as not to move to the other end of the first feeding rod 7. The tip part is formed in a substantially bowl shape with half of the axial direction removed, and the engaging step part 74 is formed in the direction perpendicular to the axial direction on the flat part side, and the second feeding into the engaging step part 74 A connecting arm 81 (an engaging step portion 82) projecting from one end of the flange 8 is detachably engaged and connected.
[0019]
The retaining cylinder 76 is for maintaining the connected state so that the second feeding rod 8 is not separated from the first feeding rod 7, and has an inner diameter substantially the same as the outer diameter L1 of the engaging arm 75, and It is formed in a cylindrical or rectangular tube shape having a length that can cover at least the engagement step portion 74 of the engagement arm 75, and is provided on the outer periphery of the engagement arm 75 so as to be slidable in the axial direction. The amount of sliding movement and the rotation in the circumferential direction are restricted by loosely engaging the stopper 78 projecting on the side with an elongated hole 79 formed in the axial direction.
[0020]
The elastic spring 77 is formed in a substantially coil shape, and the outer peripheral surface of the engaging arm 75 is urged so that the retaining cylinder 76 is always biased in a direction covering the outer periphery of the engaging step portion 74 of the engaging arm 75. And an inner peripheral surface of the retaining cylinder 76.
[0021]
On the other hand, the second feed rod 8 is formed in a required length (for example, about 52 cm) using a metal or plastic hollow pipe material that is excellent in rigidity and lightweight, like the first feed rod 7. A connecting arm 81 that is engaged with and connected to the engaging arm 75 of the first feeding rod 7 is provided on one end side, and the other end side is formed in the same manner as the other end side of the first feeding rod 7.
That is, on the one end side of the second feeding rod 8, similarly to the engaging arm 75 of the first feeding rod 7, a solid metal or plastic solid round bar or square bar material having excellent rigidity is used. Engagement that fits with the engagement step 74 of the engagement arm 75 in the first feed rod 7 in the direction perpendicular to the axial direction on the flat portion side, with the tip portion being half cut in the axial direction. The connecting arm 81 formed with the stepped portion 82 is projected in a fixed manner so as not to move to one end side of the second feeding rod 8.
[0022]
Then, the other end side of the second feeding rod 8 is formed with an engaging step portion 83 that is compatible with the engaging step portion 82 of the connecting arm 81 provided on one end side of another second feeding rod 8. An arm 84 and a retaining cylinder 85 that slides in the axial direction and covers the outer periphery of the engaging step portion 83 of the connecting arm 84 are provided, and are interposed between the retaining cylinder 85 and the connecting arm 84. A resilient spring 86 is provided for biasing the retaining cylinder 85 in a direction covering the outer periphery of the engaging step portion 83 of the connecting arm 84. The stopper cylinder 85 is loosely engaged with a stopper 88 projecting toward the connecting arm 84 in an elongated hole 87 formed in the axial direction, and its sliding movement amount and circumferential rotation are restricted. .
[0023]
Thus, when the second feeding rod 8 is connected to the first feeding rod 7, first, as shown in FIG. 1, the retaining cylinder 76 of the first feeding rod 7 is applied to the urging force of the elastic spring 77. It slides against, and the engagement step part 74 of the engagement arm 75 is exposed. In this state, the engaging step portion 82 of the connecting arm 81 projecting from one end of the second feeding rod 8 is engaged with the engaging step portion 74 of the engaging arm 75 so as to overlap. Thereafter, when the hand is released from the retaining cylinder 76 of the first feeding rod 7, the retaining cylinder 76 is returned to its original position by the urging force of the elastic spring 77, and the engaging cylinders are engaged with each other. The outer periphery of the engagement step portion 74 of the joint arm 75 and the engagement step portion 82 of the connecting arm 81 is covered, and the connected state of the first feeding rod 7 and the second feeding rod 8 is maintained.
[0024]
Further, when another second feeding rod 8 is added to the other end side of the second feeding rod 8, the second feeding rod 8 is connected to the first feeding rod 7 in the same manner as when the second feeding rod 8 is connected. The retaining cylinder 85 is slid against the urging force of the elastic spring 86 to expose the engaging step portion 83 of the connecting arm 84, and the connecting arm 81 protruded from one end side of the second feeding rod 8. The engaging step portion 82 is engaged with the engaging step portion 83 of the connecting arm 84 so as to overlap. Thereafter, if the hand is released from the retaining cylinder 85 of the second feeding rod 8, the retaining cylinder 85 is returned to its original position by the urging force of the elastic spring 86, and the connection is engaged with each other in an overlapping manner. The outer periphery of the engaging step portion 83 of the arm 84 and the engaging step portion 82 of the connecting arm 81 is covered, and the connected state between the second feeding rod 8 and another second feeding rod 8 is maintained.
[0025]
At this time, the first feed rod 7 and the second feed rod 8 or between the second feed rod 8 and another second feed rod 8 so that the feed rod E becomes long and does not bend in the middle. And a support ring 9 formed in a circular ring shape having an inner diameter substantially the same as the outer diameter of the connecting arm 81 of the second feed rod 8 and having an outer diameter slightly smaller than the inner diameter of the unused supply pipe A. Is preferred. This support ring 9 is used when the engaging arm 75 of the first feeding rod 7 and the connecting arm 81 of the second feeding rod 8 are coupled, or the connecting arm 84 of the second feeding rod 8 and another second feeding rod 8. When connecting the connecting arm 81, the connecting arm 81 is fitted in advance.
[0026]
【The invention's effect】
According to the first aspect of the present invention, the closing part for closing the unused supply pipe includes an elastically deformable seal member having a circular cross section slightly smaller than the inner diameter of the unused supply pipe, and the seal members on both sides. First and second clamping members that cause the seal member to bulge and deform in the circumferential direction by being moved closer to each other to be in close contact with the inner peripheral surface of the unused supply pipe, and both end sides or one end sides of the seal member The leakage prevention board is formed in a circular plate shape having a diameter slightly larger than the inner diameter of the unused supply pipe using a single foam sponge material having a hardness (Hvs) of 15 to 35. Therefore, when the plugging part is inserted into the unused supply pipe, the leakage prevention panel is immediately closed close to the inner peripheral surface of the unused supply pipe, and for the time being, gas leakage from the unused supply pipe is prevented. Will be prevented. Accordingly, in the subsequent closing operation, the no-blow cover (sealing work bag) for preventing the gas from leaking to the outside may be removed. Therefore, the no-blow cover, which was required during the closing operation of the unused supply pipe in the past, is not necessary except at least until the closing part is inserted into the unused supply pipe, and the blocking part is not used. After inserting into the supply pipe, it is possible to remove the no-blow cover. As a result, it is possible to easily and quickly close the unused supply pipe, greatly improving workability. I can do it.
In addition, there is no no blow cover when sending the closing part to a predetermined position in the unused supply pipe, that is, the operator may perform the closing work while inserting the arm from the outflow prevention mechanism part of the no blow cover. Since it has disappeared, it becomes possible to accurately and simply feed the closing part to a predetermined position in the unused supply pipe.
[0027]
According to the second invention of the present invention, the feeding rod for feeding the closing part to a predetermined position in the unused supply pipe is separable into a first feeding rod and a first feeding rod that are detachably connected to the closing part. And an engaging groove that is detachably engaged with an engaging pin that protrudes from the connecting member of the closing part. The engaging groove is formed on one end of the first feeding rod. A resilient spring that presses the connecting member of the closing part connected to the mating groove is provided, and is engaged by sliding in the axial direction with an engaging arm formed with an engaging step on the other end of the first feeding rod. A resilient cylinder that covers the outer periphery of the stepped portion and is interposed between the retaining tube and the engaging arm to urge the retaining cylinder in a direction to cover the outer periphery of the engaging stepped portion. A spring is provided, and one end side of the second feeding rod is provided with an engagement arm provided on the first feeding rod. Since conforming engagement stepped portion and Godan portion is provided with a coupling arm which is formed can be reliably fed installed occlusion parts for closing the unused feed pipe to a predetermined position of non-use supply pipe. That is, the second feeding rod can be easily and firmly connected to the first feeding rod, and the entire feeding rod is rotated in the circumferential direction with the second feeding rod connected to the first feeding rod. Closing operation of the closing part (the first holding member and the second holding member are moved closer to each other to cause the sealing member to bulge and deform in the circumferential direction, and the outer peripheral surface of the sealing member is brought into close contact with the inner peripheral surface of the unused supply pipe. Operation).
[0028]
Furthermore, a connecting arm having an engaging step portion that matches an engaging step portion of a connecting arm provided on one end side of another second feeding rod is provided on the other end side of the second feeding rod, and a shaft A retaining cylinder that slides in the direction and covers the outer periphery of the engaging step portion of the connecting arm, and is interposed between the retaining cylinder and the connecting arm, and the retaining cylinder is engaged with the engaging step of the connecting arm. By providing a resilient spring that biases the outer circumference of the part, it is easy to add another second feeding rod to the second feeding rod as necessary, and the position to install the blocking part is not used. Even inside the supply pipe, it is possible to easily cope with it.
[0029]
Also, a support ring formed in the shape of a circular ring slightly smaller than the inner diameter of the unused supply pipe between the first feeding rod and the second feeding rod or between the second feeding rod and another second feeding rod. Therefore, even when the second feeding rod is connected to the first feeding rod or when another second feeding rod is added to increase the total length of the feeding rod, the feeding rod does not bend midway. In other words, if the feed rod is bent in the middle, the axial center direction of the closed part is shifted from the axial direction of the unused supply pipe due to the influence, and the outer peripheral surface of the seal member is exactly aligned with the inner peripheral surface of the unused supply pipe. Although not in close contact, the present invention eliminates such concerns.
[Brief description of the drawings]
FIG. 1 is an exploded view showing an example of the present invention, with a part cut away.
FIG. 2 is a perspective view illustrating a state where a first feeding rod is connected to a closing part.
FIG. 3 is a partially cutaway front view showing a state in which a closing operation is performed.
FIG. 4 is a schematic diagram illustrating a conventional example.
[Explanation of symbols]
A: Non-use supply pipe B: Blocking part E: Feeding rod 1: Seal member 2: First clamping member 3: Second clamping member 4: Leakage prevention panel 5: Connecting member 51: Engaging pin 7: First feeding rod 71: Engagement groove 72: Bullet spring 74: Engagement step 75: Engagement arm 76: Retaining cylinder 77: Bullet spring 8: Second feeding rod 81: Connection arm 82: Engagement step 83: Engagement Joint step 84: connecting arm 85: retaining cylinder 86: bullet spring 9: support ring

Claims (4)

An unused supply pipe closing device comprising a closing part for closing an unused supply pipe and a feed rod for feeding the closed part to a predetermined position in the unused supply pipe, wherein the feed rod is the closure A first feed rod connected to the component in a separable manner and a second feed rod connected to the first feed rod in a separable manner, and a connecting member for the closing component is provided at one end of the first feed rod. An engaging groove that is detachably engaged with an engaging pin projecting from the engaging pin, and a spring that presses the connecting member of the closing part connected to the engaging groove is provided, and the first feeding rod The other end side is provided with an engagement arm formed with an engagement step portion and a retaining cylinder that slides in the axial direction to cover the outer periphery of the engagement step portion, and between the retaining tube and the engagement arm. The retaining cylinder is interposed between the outer periphery of the engaging step portion. An elastic spring for biasing in the covering direction is provided, and an engagement step portion is formed on one end side of the second feed rod to match the engagement step portion of the engagement arm provided on the first feed rod. A non-use supply pipe closing device characterized in that a connecting arm is provided . The closing part expands in the circumferential direction by moving the seal member close to each other with both sides of the seal member elastically deformable having a circular cross section slightly smaller than the inner diameter of the unused supply pipe. A first and second clamping member that is deformed and brought into close contact with the inner peripheral surface of the unused supply pipe; and a leakage prevention panel provided concentrically on both ends or one end of the seal member, the leakage prevention panel 2. The unused supply pipe closing device according to claim 1, which is formed in a circular plate shape having a diameter slightly larger than the inner diameter of the unused supply pipe using a single foam sponge material having a hardness (Hvs) of 15 to 35. 3. On the other end side of the second feed rod, there is provided a connecting arm formed with an engagement step portion adapted to an engagement step portion of a connecting arm provided on one end side of another second feed rod, and the axial direction And a retaining cylinder that covers the outer periphery of the engaging step portion of the connecting arm, and is interposed between the retaining tube and the connecting arm, and the retaining tube is engaged with the engaging step portion of the connecting arm. occlusion device unused feed pipe directions formed by providing a resilient spring biases claim 1, wherein covering the outer periphery. A support ring formed in the shape of a circular ring slightly smaller than the inner diameter of the unused supply pipe is provided between the first feeding rod and the second feeding rod or between the second feeding rod and another second feeding rod. The non-use supply pipe closing device according to claim 1 or 3.

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