JP6652405B2 - Expansion / contraction device - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention can be inserted into a through-hole formed in a flow path forming wall portion such as a fluid pipe or a split T-shaped joint provided on the fluid pipe or a coated cylindrical body that covers an inner peripheral surface of the through-hole. The insertion operation tool is provided with expanding / contracting means that can be changed between a reduced diameter state in which the diameter is smaller than the hole diameter of the through hole or the inner diameter of the coated cylindrical body and an enlarged diameter state in which the diameter is larger than the hole diameter of the through hole. The present invention relates to a scaled operation device.

As the above-mentioned expansion / contraction operation device, generally, an expansion working section for sealing a through hole of a flow path forming wall portion, or a coating cylinder for coating an inner peripheral surface of a through hole of a flow path forming wall portion. It is used in combination with an expansion work part for mounting a bush, which forms a shape (such as a bush or a rust-preventive sleeve) in a state where the diameter of the bush is stopped.
For example, as an expansion / contraction operation device combined with an expansion working unit for sealing a through hole, there is a branch pipe flow passage blocking device disclosed in Patent Document 1.
The expanding / contracting means provided in the branch pipe flow path cutoff device is configured such that the inner operating shaft and the outer operating shaft of the inner / outer dual structure constituting the operating shaft of the insertion operating tool are slidably mounted on the inner operating shaft. And a link mounting member screwed to a distal end of a screw shaft portion of the inner operation shaft penetrating the movable pressing plate.
The expanding / contracting means includes a pair of mounting pieces provided at two locations in the circumferential direction on the back surface of the movable pressing plate and two mounting pieces provided at two locations in the circumferential direction of the link mounting member. A waist-folding link that can project radially outward is pivotally connected between the two sets of mounting pieces.

When the interval between the two mounting pieces of each set is at the set maximum interval, each of the bent links is bent into a gentle "H" shape in which the link crossing angle becomes an obtuse angle, and the flow path forming wall portion is formed. The diameter of the through-hole (corresponding to the upstream pipe portion 3 in Patent Document 1) is smaller than the diameter of the through-hole (in Patent Document 1, the through-hole is continuous in the axial direction of the operating shaft). The diameter is kept reduced.
In addition, each of the buckling links is radially outwardly shaped with a “V” in a state where the link crossing angle becomes an acute angle due to the close movement of each mounting piece of each set accompanying the upward movement of the inner operation shaft with respect to the outer operation shaft. And the diameter is changed to an expanded state in which the diameter is larger than the diameter of the through hole in the flow path forming wall.
Then, the intermediate pivot connecting portion of the two sets of bent links that have been changed to the expanded state is engaged with the periphery of the opening of the through hole in the inner surface of the flow path forming wall, and the expanding / contracting means of the branch pipe flow path blocking device is operated. It is retained at a predetermined mounting position against water pressure (fluid pressure).

  Further, the extension working part for sealing the through hole is screwed to the fixed pressing plate fixed to the tip of the outer operation shaft, the above-mentioned movable pressing plate, and the screw shaft portion of the inner operation shaft. A pressing member using a nut that presses and moves the movable pressing plate toward the fixed pressing plate with the upward movement of the inner operation shaft with respect to the shaft, and a radially outer member that is pressed with the pressing force between the fixed pressing plate and the movable pressing plate. A ring-shaped elastic body that seals between the inner peripheral surface of the through hole and the outer peripheral portions of both the pressing plates by elastically swelling and deforming.

Japanese Utility Model Publication No. 4-3196

The expanding / contracting means of the conventional branch pipe flow path cutoff device is used to lock the intermediate pivotal connection portion of the two sets of hip broken links changed to the expanded state to the opening edge of the through hole in the inner surface of the flow path forming wall portion. In addition, a large hydraulic pressure (fluid pressure) acting on the expansion working part for sealing the through hole is received by the intermediate pivotal connection part of the both buckling links, so that the entire both buckling links need to be constructed firmly.
Furthermore, the two sets of hip-fold links that constitute the conventional expanding / contracting means have a function of merely locking the intermediate pivot connecting portion to the opening peripheral edge of the through hole in the inner surface of the flow path forming wall portion. It has not been used for any other purpose.

  In view of this situation, the main problem of the present invention is to improve the expansion and contraction means to achieve a smooth insertion / extraction operability with respect to the through-hole of the flow path forming wall portion or the coated cylindrical body that covers the inner peripheral surface of the through-hole. An object of the present invention is to provide an expansion / contraction operation device that can reliably and firmly receive a fluid pressure in a dispersed state while securing the same, and can easily diversify the usage form.

A first characteristic configuration according to the present invention is that an insertion operation tool that can be inserted into a through hole formed in a flow path forming wall portion or a covering cylindrical body that covers an inner peripheral surface of the through hole has a hole diameter of the through hole. Or an expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter is smaller than the inner diameter of the coated tubular body and an expanded state in which the diameter is larger than the hole diameter of the through-hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. and the form changing mechanism for changing to the expanded state of projecting includes et al is in,
In the insertion operation tool, the movable piece is disposed at a portion facing the inner peripheral surface of the through hole or the inner peripheral surface of the coating tubular body in a state where the movable piece is locked at an inner opening edge of the through hole. An elastic body that is elastically swellable and deformable outward in the radial direction, and the elastic body is in a contracted state in which the diameter of the through hole is smaller than the inner diameter of the through-hole or the inner diameter of the covering cylindrical body, and is larger than the diameter of the through hole. An expansion operation section having an elastic operation mechanism for changing to a bulged state having a large diameter is provided, and at least a part of the movable piece has the elasticity associated with the change of the elastic operation mechanism to the bulged state. A receiving portion for receiving elastic expansion deformation of the body from the axial direction of the insertion operation tool is provided .

According to the above configuration, when the expansion / contraction means provided on the insertion operation tool is inserted into the through hole of the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through hole, the expansion / contraction means is arranged in the circumferential direction. The plurality of movable pieces are reduced in diameter by the form changing mechanism. As a result, the plurality of movable pieces retreat radially inward to a form having a diameter smaller than the hole diameter of the through hole or the inner diameter of the covering cylindrical body. It can be inserted smoothly into the cylindrical body.
Next, when the plurality of movable pieces inserted into the predetermined position are expanded in diameter by the form changing mechanism, the plurality of movable pieces have a circular shape on the radially outward side in a form having a diameter larger than the diameter of the through hole or Projects in a substantially circular shape.
Thereby, the plurality of movable pieces that are changed from the reduced diameter state to the expanded diameter state are locked in a circular shape or a substantially circular shape from the axial direction with respect to the inner opening edge of the through hole in the flow path forming wall portion. It can be configured as a movable piece for locking, or radially outward until the entire circumference or almost the entire circumference of the protruding end of the coated cylindrical body that covers the inner peripheral surface of the through hole is in the stopped state. It can be configured as a movable piece for expansion processing for expanding and deforming.

Therefore, when the movable piece is configured as a locking movable piece, the plurality of movable pieces protrude in a circular shape or a substantially circular shape. It can be dispersedly supported at a wide circular or substantially circular contact portion that contacts the edge.
Further, when the movable piece is configured as a movable piece for expansion processing, the plurality of movable pieces protrude in a circular shape or a substantially circular shape, so that the entire circumference or substantially the entire circumference of the protruding end portion of the covering cylindrical body is reliably expanded. It can be radially deformed.
Therefore, by the above-described rational improvement of the expansion / contraction means, the fluid pressure can be reduced while ensuring smooth insertion / extraction operability with respect to the through-hole of the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole. It is possible to reliably and firmly receive in a dispersed state, and it is possible to easily diversify the usage form.

Furthermore, when inserting the expansion / contraction means provided on the insertion operation tool into the through-hole of the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole, a plurality of movable pieces arranged in the circumferential direction are provided. Is reduced by the form changing mechanism, and the elastic body of the expansion working unit is contracted by the elastic operation mechanism. Thereby, the plurality of movable pieces retreat radially inward to a form having a diameter smaller than the diameter of the through-hole or the inner diameter of the covering cylindrical body, and the elastic body has a hole diameter of the through-hole or a diameter of the covering cylindrical body. Since the movable piece and the elastic body of the expansion working unit are smoothly contracted to a state where the diameter becomes smaller than the inner diameter, the movable piece and the elastic body of the expansion working unit can be smoothly inserted into the through-hole or the covering cylindrical body of the flow path forming wall.
Next, when the plurality of movable pieces inserted into the predetermined position are expanded in diameter by the form changing mechanism, the plurality of movable pieces have a circular shape on the radially outward side in a form having a diameter larger than the diameter of the through hole or Projects in a substantially circular shape.
Thereby, the plurality of movable pieces that are changed from the reduced diameter state to the expanded diameter state are locked in a circular shape or a substantially circular shape from the axial direction with respect to the inner opening edge of the through hole in the flow path forming wall portion. It can be configured as a movable piece for locking, or radially outward until the entire circumference or almost the entire circumference of the protruding end of the coated cylindrical body that covers the inner peripheral surface of the through hole is in the stopped state. It can be configured as a movable piece for expansion processing for expanding and deforming.
Further, when the elastic body of the expansion working unit is brought into a bulged state by the elastic operation mechanism, the elastic body is elastically bulged and deformed radially outward to a bulged state having a diameter larger than the diameter of the through hole. .
At this time, the elastic body tends to elastically swell and deform in the axial direction of the insertion operation tool, but the elastic swelling and deformation of the elastic body in the axial direction is provided on at least a part of the movable piece. Therefore, the elastic body can be efficiently elastically bulged and deformed radially outward.
Therefore, for example, in the case where the elastic body of the expansion working portion is formed of an elastic sealing material that seals the through hole of the flow path forming wall portion in a swelling state, the through hole of the flow path forming wall portion is surely formed. Can be sealed. Further, the elastic body of the expanding working portion is configured as an expanding elastic body that expands and deforms the coated cylindrical body that covers the inner peripheral surface of the through hole of the flow path forming wall portion in the swelled state in the retaining state. In such a case, the diameter of the coated tubular body can be reliably expanded and deformed to the retaining state.

A second characteristic configuration according to the present invention is that the insertion operation tool can seal the through-hole between the movable piece in the expanded state and an inner opening edge of the through-hole, and An annular elastic seal material that can be bent and deformed to a shape having a diameter smaller than the hole diameter of the through hole or the inner diameter of the covering cylindrical body, and the elastic seal material through the movable piece in the enlarged diameter state through the through hole. Is provided with a pressing mechanism that presses against the inner side opening edge side.

According to the above configuration, when the expansion / contraction means and the elastic sealing material provided on the insertion operation tool are inserted into the through-hole of the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole, the circumference is not changed. The plurality of movable pieces arranged in the directions are reduced in diameter by the shape changing mechanism. As a result, the plurality of movable pieces retreat radially inward to a form having a smaller diameter than the hole diameter of the through-hole or the inner diameter of the covering cylindrical body. Can be inserted.
In addition, the elastic sealing material is larger than the hole diameter of the through hole or the inner diameter of the coating cylindrical body in accordance with the contact with the outer side opening edge of the through hole or the opening edge of the coating cylindrical body in the flow path forming wall portion. After passing while bending and deforming to a small diameter form, between the movable piece and the inner edge of the inner surface of the through hole in the flow path forming wall, the through hole is returned to the original state capable of sealing with elastic restoring force. I do.
Next, when the plurality of movable pieces inserted into the predetermined position are expanded in diameter by the form changing mechanism, the plurality of movable pieces have a circular shape on the radially outward side in a form having a diameter larger than the diameter of the through hole or Projects in a substantially circular shape.
In this state, the entire outer peripheral edge portion or almost the entire outer peripheral portion of the elastic seal material is formed into a flow path by pressing the elastic seal material toward the inner opening side of the through hole through the movable piece in the locked state by the pressing mechanism. The through hole can be securely sealed by being pressed against the inner opening edge of the through hole in the wall portion.

A third characteristic configuration according to the present invention is that the movable piece has a tapered first movable piece whose circumferential direction width increases toward one end side in the axial direction of the insertion operation tool, and a shaft center of the insertion operation tool. The second movable piece having a tapered shape whose circumferential direction width is increased toward the other end in the direction is alternately arranged in such a state that both sides adjacent in the circumferential direction are slidably contacted in the axial direction. And the form changing mechanism is configured to move the first movable piece and the second movable piece relative to each other in the axial direction until the diameter becomes larger than the diameter of the through hole. With the diameter changing mechanism for moving closer, and with the expansion canceling operation of the diameter changing mechanism, the first movable piece and the second movable piece are moved from the hole diameter of the through hole or the inner diameter of the coating tubular body. The relative distance is shifted in the axial direction until the diameter becomes smaller. In that it is composed of a diameter changing mechanism for.

According to the above configuration, the first movable piece and the second movable piece whose taper directions are opposite to each other are in a state in which both sides adjacent in the circumferential direction are slidably contacted in the axial direction. Since the first movable piece and the second movable piece are slid in the axial direction, the outer diameter of the piece outer surface formed by the first movable piece and the second movable piece is alternately arranged. It changes continuously.
Therefore, when the first movable piece and the second movable piece are relatively separated and moved along the axial direction by the diameter reducing mechanism, the outer diameter of the outer surface formed by the first movable piece and the second movable piece becomes smaller. The diameter is reduced to a reduced state in which the diameter is smaller than the hole diameter of the through hole or the inner diameter of the coated cylindrical body.
Further, when the first movable piece and the second movable piece are moved relatively close to each other in the axial direction by the diameter increasing mechanism, the outer diameter of the outer surface formed by the first movable piece and the second movable piece is reduced. The diameter is expanded to a state where the diameter becomes larger than the diameter of the through hole.
Therefore, the structure of the expansion and contraction means can be made compact. In particular, the first movable piece and the second movable piece, which are changed from the reduced diameter state to the expanded diameter state, are moved radially outward until the protruding end of the covering cylindrical body covering the inner peripheral surface of the through hole is stopped. In the case where the movable piece is configured to be expanded and deformed so that the diameter is increased, the expanded processing surface formed by the first movable piece and the second movable piece can be configured to be wide.

A fourth characteristic configuration according to the present invention is that an insertion operation tool that can be inserted into a through hole formed in a flow path forming wall portion or a covering cylindrical body that covers an inner peripheral surface of the through hole has a hole diameter of the through hole. Or an expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter is smaller than the inner diameter of the coated tubular body and an expanded state in which the diameter is larger than the hole diameter of the through-hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. And a form changing mechanism for changing to an expanded state protruding from
The movable piece is configured by arranging a third movable piece that is swingable in the axial direction with respect to the insertion operation tool in a circumferential direction, and the form changing mechanism is configured to remove the third movable piece. A clamping mechanism that clamps and holds the diameter-increased state from both sides in the axial direction, and interlocks with the clamping release operation of the clamping mechanism to move the third movable piece to the outer opening edge of the through hole and the inner surface of the through hole. The present invention is characterized in that the free swing mechanism is configured to be in a free swing state that can be changed to the reduced diameter state in accordance with the contact with the side opening edge.

According to the above configuration, since the third movable piece that is swingable in the axial direction with respect to the insertion operation tool is disposed in the circumferential direction, the third movable piece is clamped from both sides in the axial direction by the clamping mechanism. By simply holding the third movable piece, it is possible to change the third movable piece to a radially expanded state in which the third movable piece projects radially outwardly in a circular or substantially circular shape in a form having a diameter larger than the diameter of the through hole.
Further, each of the third movable pieces is brought into contact with the outer opening edge of the through hole or the inner opening edge of the through hole in the flow path forming wall portion by the free swinging mechanism interlocking with the holding release operation of the holding mechanism. Accordingly, a free swing state that can be changed to the insertion / extraction state can be achieved.
Therefore, the structure of the locking means can be simplified. In particular, the third movable piece, which is swingably changed from the reduced diameter state to the increased diameter state, is expanded radially outward until the protruding end of the covering cylindrical body covering the inner peripheral surface of the through hole is stopped. In the case where the movable piece is used for expansion processing for radially deforming, the entire circumference or substantially the entire circumference of the protruding end of the coated tubular body can be reliably expanded and deformed with a simple structure.

A fifth characteristic configuration according to the present invention is that a linkage mechanism is provided for linking the first movable piece and the second movable piece movably within a certain range in the axial direction and the radial direction.

  According to the above configuration, the first movable piece and the second movable piece whose taper directions are opposite to each other are brought into contact with each other in such a manner that both sides adjacent to each other in the circumferential direction are slidably contacted in the axial direction. When the first movable piece and the second movable piece are alternately arranged, the first movable piece and the second movable piece can be movably linked within a certain range in the axial direction and the radial direction by the linkage mechanism. Can be easily assembled.

A sixth characteristic configuration according to the present invention is characterized in that an insertion operation tool that can be inserted into a through-hole formed in a flow path forming wall portion or a covering cylindrical body that covers an inner peripheral surface of the through-hole has a hole diameter of the through-hole. Or an expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter is smaller than the inner diameter of the coated tubular body and an expanded state in which the diameter is larger than the hole diameter of the through-hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. And a form changing mechanism for changing to an expanded state protruding from
The movable piece is configured by arranging a third movable piece that is swingable in the axial direction with respect to the insertion operation tool in a circumferential direction, and the form changing mechanism is configured to remove the third movable piece. A clamping mechanism for clamping and holding the expanded state from both sides in the axial direction, and interlocking with the clamping release operation of the clamping mechanism, the third movable piece is moved to the outer opening edge of the through hole or the inner surface of the through hole. It comprises a free swinging mechanism that sets a free swinging state that can be changed to the reduced diameter state according to contact with the side opening edge,
The plurality of third movable pieces are divided into a plurality of groups located at predetermined intervals along the circumferential direction, and the third movable pieces of each group are slidably mounted on the operation shaft of the insertion operation tool. When the third movable piece is in the free swing state, the space in the axial direction of the mounting member is set to the third swingable member by the third swingable member. The point is that an interval regulating means for regulating the interval so that the swing of the movable pieces does not interfere with each other is provided.

According to the above configuration, the third movable piece that projects in a circular or substantially circular shape outward in the radial direction in a form having a diameter larger than the diameter of the through hole in the expanded state is predetermined along the circumferential direction. Since the third movable piece of each group is slidably mounted on a plurality of mounting members slidably mounted on the operation shaft of the insertion operation tool, the third movable piece of each group is swingably mounted on each group. A space can be secured between adjacent third movable pieces of each group.
Therefore, when the third movable piece is in the free swing state, the gap in the axial direction of the annular mounting member is set by the gap regulating means of the free swing mechanism so that the swing of the third movable piece does not interfere with each other. Can be set easily.

A seventh characteristic configuration according to the present invention is characterized in that the elastic operation mechanism of the expansion working unit is provided with a pair of pressing members that can press the elastic body from the axial direction of the insertion operation tool, The present invention is characterized in that, in the movable piece, the receiving portion is provided at a portion protruding radially outward from one pressing member facing the movable piece in the locked state.

  According to the above configuration, when the elastic body of the expansion working unit is set in the expanded state by the elastic operation mechanism, the movable piece protrudes radially outward from one of the pressing members facing the movable piece in the locked state. The receiving portion provided at the part to be pressed can receive a part of the elastic body that is going to elastically swell and deform in the axial direction beyond the outer diameter side of one of the pressing members, thereby simplifying the structure. The elastic body can be efficiently elastically bulged and deformed radially outward.

An eighth characteristic configuration according to the present invention resides in that a part of the movable piece is configured as an expanded processing portion that expands and deforms the coated cylindrical body in a retaining state.

  According to the above configuration, the entire circumference or substantially the entirety of the protruding end portion of the coated tubular body is improved by a rational improvement in which a part of the movable piece that is swingably changed from the reduced diameter state to the increased diameter state is used as an expanded portion. The circumference can be reliably expanded and deformed.

A ninth characteristic configuration according to the present invention resides in that the elastic body of the expansion working unit is configured as an elastic sealing material that seals the through hole in the expanded state.

  According to the above configuration, the through hole of the flow path forming wall portion can be reliably sealed by the elastic sealing material including the elastic body of the expansion working portion.

A tenth characteristic configuration according to the present invention resides in that the elastic body of the expansion working unit is configured as an expansion elastic body that expands and deforms the coated cylindrical body in the expanded state to a retaining state in the expanded state. .

  According to the above configuration, the covering elastic body can be reliably expanded and deformed to the retaining state by the elastic body for expansion constituted by the elastic body of the expanding working portion.

The longitudinal section of the important section in the free swing state showing the 1st enlargement / reduction operation device of a 1st embodiment. II-II sectional view taken on the line in FIG. III-III sectional view taken on the line in FIG. Perspective view of a main part of the first expansion / contraction operation device in a free swing state. The perspective view of the principal part of the 1st expansion / contraction operation device at the time of insertion of a through-hole (a), and at the time of extraction (b). Longitudinal sectional view of a main part of the first expansion / contraction operation device when the bush is mounted. The perspective view of the principal part of the 1st expansion / contraction operation device which shows the diameter expansion state of a 3rd movable piece. The longitudinal section of the important section in the diameter reduction state which shows the 2nd expansion / contraction operation device of 2nd Embodiment. Longitudinal sectional view of a main part of the second expanding / contracting operation device in a diameter-expanded state. Perspective view of a main part of the second expansion / contraction operation device in a reduced diameter state. The perspective view of the principal part of the 2nd expansion / contraction operation device in a diameter expansion state. Exploded perspective view of a main part of a second enlargement / reduction operating device. Front view of the first movable piece (a) and front view of the second movable piece (b) Longitudinal sectional view in a free swing state showing a bush mounting machine of a third embodiment. Longitudinal sectional view of the bush mounting machine when the bush is mounted Longitudinal sectional view in a free swing state showing a bush mounting machine of a fourth embodiment. Longitudinal sectional view of the bush mounting machine when the bush is mounted Longitudinal sectional view showing a branch channel breaker of a fifth embodiment. Longitudinal sectional view showing a branch flow channel breaker of a sixth embodiment. Enlarged vertical cross-sectional view of main parts of branch passage breaker in free swing state Longitudinal sectional view showing the expanded state of the branch flow path breaker Enlarged vertical cross-sectional view of the main part in the expanded state of the branch flow path breaker Longitudinal cross-sectional view showing the extracted state of the branch flow path breaker Enlarged vertical cross-sectional view of the main part of the branch flow path breaker in the extracted state Longitudinal sectional view showing a sleeve mounting machine of a seventh embodiment. Longitudinal sectional view showing a sleeve mounting machine of an eighth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
In the branch structure of the water pipe system which is an example of the fluid pipe system shown in FIG. 1, the thermosetting resin is impregnated into the pipe of the rehabilitation target area in a water-off state among the existing cast iron water pipes 1. Further, the water pipe 1 is subjected to a lining process (hose lining method) in which a tubular lining material to which an adhesive is applied is reversely inserted and bonded, and the thermosetting resin of the lining material is cured by steam heating or room temperature curing. A lining treatment layer 1A is integrally formed on the inner peripheral surface of the substrate in a state of close contact.
In the above-described branch structure, the pipe wall portion (an example of a flow path forming wall portion) of the lining-treated water pipe 1 corresponding to the branch intersects with the pipe axis direction of the water pipe 1 ( In the present embodiment, the through-hole 2 is formed to penetrate along the direction of the branch axis perpendicular to the branch axis, so that corrosion of the inner peripheral surface of the through-hole 2 of the water pipe 1 is prevented and at the same time, the inner peripheral surface of the water pipe 1 is prevented. It is necessary to prevent inflow of clean water (fluid) between the joining surface of the lining treatment layer 1A and the outer peripheral surface.

  Therefore, in the first expansion and contraction operation device A1 of the first embodiment of the present invention shown in FIGS. 1 to 7, the coating cylindrical shape that covers the inner peripheral surface 2a of the through hole 2 extending between the water pipe 1 and the lining treatment layer 1A. An example of the body C, a function of expanding and deforming the metal bush 3 having a length in the branch axis direction larger than the thickness of the water pipe 1 including the lining treatment layer 1A in a retaining state, and a water pipe. 1 is provided with a function of retaining it at a predetermined insertion position against water pressure by locking the inner side opening edge 1b of the through hole 2 in the branch shaft center direction. Will be described in detail.

As a basic configuration of the first expansion / contraction operation device A1, a water pipe 1 is inserted into an operation shaft B of an inner / outer dual structure which is an example of an insertion operation tool that can be inserted into the through hole 2 or the bush 3 of the water pipe 1. An expanding / reducing means K is provided which can be changed between a reduced diameter state in which the diameter is smaller than the hole diameter of the hole 2 or the inner diameter of the bush 3 and an expanded state in which the diameter is larger than the hole diameter of the through hole 2 of the water pipe 1.
The expansion / contraction means K includes a plurality of movable pieces P arranged in the circumferential direction so as to be movable in the hole diameter direction of the through hole 2 with respect to the operation axis B, and the movable piece P is provided with a hole diameter of the through hole 2 or a bush. In the reduced diameter state (see FIG. 5) in which the inner diameter of the through hole 2 is smaller than the inner diameter of the through hole 3 (see FIG. 5), the outer diameter of the through hole 2 is circular or A first form changing mechanism D is provided for changing the state to an expanded state (see FIG. 7) protruding in a substantially circular shape.
Therefore, when the movable piece P of the expansion / contraction means K provided on the operation shaft B is inserted into the through hole 2 or the bush 3 of the water pipe 1, the plurality of movable pieces P arranged in the circumferential direction are changed to the first form. The diameter is reduced by the change mechanism D. As a result, the plurality of movable pieces P retreat radially inward to a form having a smaller diameter than the hole diameter of the through hole 2 or the inner diameter of the bush 3. 3 can be smoothly inserted.

Next, when the plurality of movable pieces P inserted at the predetermined positions are expanded by the first form changing mechanism D, the plurality of movable pieces P are radially outward in a form having a diameter larger than the diameter of the through hole 2. It protrudes in a circular or substantially circular shape toward one side.
As a result, the plurality of movable pieces P, which are changed from the reduced diameter state to the expanded diameter state, are circled from the branch axis center direction to the inner side opening edge 1b of the through hole 2 in the water pipe 1 as shown in FIG. A movable piece P for retaining and locking that can be locked in a shape or a substantially circular shape, or a bush 3 that covers the inner peripheral surface of the through hole 2 as shown in FIG. The lower protruding end portion 3b can be configured as a movable piece P for expansion processing that radially expands and deforms radially outward to a retaining state.

For this reason, when the movable piece P for retaining and locking is configured, since the plurality of movable pieces P protrude in a circular or substantially circular shape, the hydraulic pressure (fluid pressure) acting on the expansion / contraction means K is controlled by the plurality of movable pieces P. The pieces P can be dispersedly supported at a wide circular or substantially circular contact portion in contact with the inner opening edge 1b of the through hole 2.
Further, when the movable piece P is configured to be expanded, the plurality of movable pieces P protrude in a circular shape or a substantially circular shape, so that the entire circumference of the lower protruding end portion 3b of the bush 3 is reliably enlarged. Can be deformed.

  As one of the bush expanding methods using the movable piece P for expansion processing, after changing the movable piece P to the expanded state, the lower protruding end portion 3b of the bush 3 is branched by the movable piece P in the expanded state. A method in which the lower protruding end portion 3b of the bush 3 is deformed so as to prevent the bush 3 from being pulled out by pressing from the core direction. As another method, the movable piece P in the reduced diameter state is arranged in the lower protruding end portion 3b of the bush 3 to be expanded, and the operation of changing the movable piece P in the reduced diameter state to the expanded state is performed. A method of increasing the diameter of the lower protruding end 3b of the bush 3 so as to prevent the bush 3 from falling off can be used.

Further, the movable piece P is disposed on the operation shaft B at a position facing the inner peripheral surface 2a of the through hole 2 or the inner peripheral surface of the bush 3 in a state where the movable piece P is locked to the inner surface side opening edge 1b of the through hole 2. A cylindrical rubber elastic body 5 elastically swellable and deformable outward in the radial direction, and a contracted state in which the elastic body 5 is made smaller in diameter than the hole diameter of the through hole 2 or the inner diameter of the bush 3. And an elastic operating mechanism 10 for changing to an expanded state in which the diameter is larger than the diameter of the hole.
Further, at least a part of the movable piece P receives the elastic expansion deformation of the elastic body 5 accompanying the change of the elastic operation mechanism 10 to the expanded state from the axial direction of the operating shaft B (the same as the branch axial direction). A receiving part 4 is provided.

When the elastic body 5 of the expansion working unit E is expanded by the elastic operation mechanism 10, the elastic body 5 elastically moves outward in the radial direction until the elastic body 5 expands to a diameter larger than the diameter of the through hole 2. It is swelled and deformed.
At this time, the elastic body 5 tends to elastically swell and deform in the axial direction, but the elastic swelling and deformation of the elastic body 5 in the axial direction is applied to the receiving portion 4 provided on at least a part of the movable piece P. Therefore, the elastic body 5 can be efficiently elastically bulged and deformed radially outward.
Therefore, for example, when the elastic body 5 of the expansion working unit E is configured as an elastic sealing material that seals the through hole 2 of the water pipe 1 in a swelling state (see FIG. 18), The through hole 2 can be reliably sealed. Also, as shown in FIGS. 1 and 6, the elastic body 5 of the expansion working portion E is expanded and deformed so that the bush 3 that covers the inner peripheral surface of the through hole 2 of the water pipe 1 in a swelling state is prevented from coming off. In the case where the bush 3 is constituted by an expanding elastic body, the bush 3 can be surely expanded and deformed to the retaining state, and the sealing performance (corrosion prevention and antiseptic performance by watertightness) of the bush 3 is improved. Can be.

  1 and 6, only a part of the lower end side of the inner operation shaft 6 and the outer operation shaft 7 fitted to be relatively slidable in the axial direction is shown in FIGS. The above-described expansion / contraction means K and expansion work section E are arranged in a region extending from a lower end portion of the outer operation shaft 7 to a lower shaft portion of the inner operation shaft 6 protruding from the outer operation shaft 7.

  The bush 3 includes a bush body 3A made of a metal (stainless steel, copper alloy, or the like) that is a hard coated cylindrical body, and a rubber elastic layer 3B formed on the outer peripheral surface of the bush body 3A. At the time of insertion, an adhesive is applied to the outer peripheral surface of the elastic layer 3B to form an adhesive layer.

In addition, various types of elastic operation mechanisms 10 of the expansion working unit E have been conventionally developed, and any of these forms can be used.
As shown in FIGS. 1 and 6, the elastic operation mechanism 10 used in the embodiment has a larger diameter than the diameter of the through hole 2 of the water pipe 1 at the tip of the outer operation shaft 7 of the operation shaft B, and The upper operating member 11 having an annular upper pressing surface 11a capable of pressing the elastic body 5 from above in the axial direction is screwed and fixed, and the inner operating shaft 6 protruding from the lower end of the outer operating shaft 7 is fixed. The lower shaft portion is provided with a lower pressing member 12 having a disk-shaped lower pressing surface 12a having a diameter smaller than the inner diameter of the bush 3 and capable of pressing the elastic body 5 from below in the axial direction. Externally slidable in the core direction.
The elastic body 5 that is pressed between the upper pressing surface 11a of the upper pressing member 11 and the lower pressing surface 12a of the lower pressing member 12 is mounted on the cylindrical shaft portion 12A of the lower pressing member 12.
The cylindrical shaft portion 12A of the lower pressing member 12 is disposed so as to extend and retract into the shaft hole 11A of the upper pressing member 11, and a portion near the lower end of the upper pressing member 11 and the cylindrical shaft of the lower pressing member 12. In the vicinity of the upper end of the portion 12A, a component of a detachment preventing portion 13 for preventing the detachment movement of the upper pressing member 11 and the lower pressing member 12, the detachment prevention using a bolt abutting from the axial center direction of the operation shaft B. Members 13A and 13B are provided.

  The bush 3 is sheathed from the elastic body 5 in the axial direction, and the elastic body 5 is slightly expanded at a set mounting position where one end of the bush 3 is in contact with the upper pressing surface 11a of the upper pressing member 11 to thereby make the bush 3 And retain it.

Then, the elastic operating mechanism 10 of the extension working unit E is fed into the through hole 2 of the water pipe 1, and the bush 3 is disposed at a set mounting position with respect to the inner peripheral surface of the through hole 2 of the water pipe 1 including the lining treatment layer 1A. When the bush 3 is located at the set mounting position, the upper and lower ends of the bush 3 project above and below the outer opening edge 1a and the inner opening edge 1b of the through hole 2 by a set length.
In this state, when the pressing members 11 and 12 are moved relatively close to each other by the relative movement operation between the outer operation shaft 7 and the inner operation shaft 6, in other words, by the upward movement operation of the inner operation shaft 6 with respect to the outer operation shaft 7. The elastic body 5 in contact with both the pressing surfaces 11a and 12a of the pressing members 11 and 12 is elastically swelled and deformed radially outward. Then, as shown in FIG. 6, the upper and lower projecting ends 3 a, 3 b of the bush 3 are radially outward with the outer opening edge 1 a and the inner opening edge 1 b of the through hole 2 being substantially bent starting points. It is bent and deformed.
As a result, the elastic layer 3B of the bush 3 is brought into close contact with the inner peripheral surface of the through hole 2 of the water pipe 1 including the lining treatment layer 1A in a press-contact state, and the adhesive formed on the outer peripheral surface of the elastic layer 3B. The layer is engaged and attached with the layer being strongly adhered to the inner peripheral surface 2a of the through hole 2.

Next, the enlarging / reducing means K of the first enlarging / reducing operation device A1 will be described in detail.
The movable piece P of the expanding / contracting means K is configured by arranging a third movable piece 20 made of metal or resin that is swingable in the axial direction with respect to the operation axis B in the circumferential direction. In this embodiment, eight (an example of a plurality of) third movable pieces 20 are arranged in the circumferential direction.
The eight third movable pieces 20 are divided into two (a plurality of examples) groups located one skip (an example of a predetermined number of skips) along the circumferential direction, and the third movable piece 20 of each group is And two (one or more examples) first and second mounting members 21 and 22 slidably mounted on the lower shaft portion of the inner operation shaft 6 of the operation shaft B so as to be swingable for each group. .
Each of the first and second mounting members 21 and 22 is formed in an octagonal shape when viewed in the axial direction of the operation shaft B, and each of the four sides located one by one along the circumferential direction has (3) A radially inward base end portion of the movable piece 20 is swingably attached via an elastic connecting body 23 such as a rubber plate which can be bent and deformed in the axial direction.
Each elastic connecting body 23 maintains the third movable piece 20 connected thereto by a stopper pin or the like in an expanded state, in other words, in a horizontal or substantially horizontal posture orthogonal or substantially orthogonal to the axis of the operation shaft B. It has a possible elastic holding force, and the distal end of the third movable piece 20 on the radially outer side is positioned on the outer opening edge 1a of the through hole 2 or the inner opening edge 1b of the through hole 2 from the axial center direction. When the third movable piece 20 is brought into contact with the third movable piece 20, the third movable piece 20 is elastically retained.

Therefore, when the third movable piece 20 is inserted into the through-hole 2 of the water pipe 1, as shown in FIG. It changes to a reduced diameter state that has swung to the side. When the third movable piece 20 is pulled out from the through hole 2 of the water pipe 1, as shown in FIG. 5 (b), the third movable piece 20 has its radially outward tip portion swinging downward. It changes to the moved reduced diameter state.
Immediately after the third movable piece 20 has passed through the through-hole 2 of the water pipe 1 in a reduced diameter state, the third movable piece 20 is in the original horizontal or horizontal state due to the elastic restoring force of the elastic connector 23. Return to almost horizontal posture and swing.

  The first configuration change mechanism D of the first expansion / contraction operation device A1 is used for holding the third movable piece 20 from both sides in the axial direction of the operation shaft B in an expanded state and holding operation of the holding mechanism D1. In conjunction therewith, the third movable piece 20 can be freely changed to a free swinging state in which the third movable piece 20 can be changed to a reduced diameter state in contact with the outer opening edge 1a of the through hole 2 or the inner opening edge 1b of the through hole 2. The swing mechanism D2 is configured. In the free swing mechanism D2, when the third movable piece 20 is in the free swing state, the arrangement interval of the first and second mounting members 21 and 22 in the axial direction is adjusted by the swing of the third movable piece 20. Interval regulating means F for regulating the interval so that the movements do not interfere with each other is provided.

Next, the clamping mechanism D1 of the first mode change mechanism D will be described.
On the lower shaft portion of the inner operating shaft 6 protruding downward from the lower end of the outer operating shaft 7, an upper holding member 25 having a diameter smaller than the inner diameter of the bush 3 is externally slidably provided in the axial direction. A lower holding member 26 having a diameter smaller than the inner diameter of the bush 3 is fixed to a lower end portion of the operation shaft 6. The upper holding member 25 is formed integrally with the rear side portion (lower side portion) of the lower pressing member 12, which is a component of the elastic operating mechanism 10 of the expansion working section E.
On the opposing side surfaces of the upper holding member 25 and the lower holding member 26, annular holding protrusions 25e for holding the upper and lower surfaces of the radially intermediate portions of the plurality of third movable pieces 20 from the axial direction are provided. , 26e are integrally formed.

Then, the upper holding member 25 and the lower holding member 26 are moved closer by the relative movement operation of the outer operation shaft 7 and the inner operation shaft 6, in other words, by the upward movement operation of the inner operation shaft 6 with respect to the outer operation shaft 7. The holding projection 25e of the upper holding member 25 contacts the upper surface of the third movable piece 20 of the first group located on the upper side, and the holding projection 26e of the lower holding member 26 is located on the lower side of the second movable piece 20. It contacts the lower surface of the third movable piece 20 of the group.
When the upper holding member 25 and the lower holding member 26 move relatively closer to each other in this contact state, the first mounting member 21 of the third movable piece 20 of the first group and the third mounting piece 20 of the third movable piece 20 of the second group are moved. After the attachment member 22 abuts from the axial direction, the elastic stretching action of the elastic connecting body 23 of the third movable piece 20 of the first group and the elasticity of the elastic connecting body 23 of the third movable piece 20 of the first group. Due to the stretching action, the third movable piece 20 of the first group and the third movable piece 20 of the second group are, as shown in FIG. 7, a plane passing through the contact surfaces of the first and second mounting members 21 and 22. Are inserted alternately in the circumferential direction, and are clamped and fixed in a disk-shaped enlarged state in which their upper and lower surfaces are aligned.

Next, the receiving portion 4 formed on at least a part of the movable piece P will be described.
As shown in FIG. 6, of the third movable piece 20 clamped and fixed in an expanded state between the upper clamping member 25 and the lower clamping member 26, the third movable piece 20 is integrally formed on the rear side of the lower pressing member 12. The receiving portion 4 is formed of an annular or substantially annular annular piece projecting radially outward from the outer surface of the upper holding member 25.
The receiving portion 4 is connected to a flat flat receiving surface 4a along the direction orthogonal to the axis of the operating shaft B, and is radially outward of the flat receiving surface 4a. And the inclined receiving surface 4b located close to the elastic body 5 side of the portion E.

Then, as shown in FIG. 6, when the elastic body 5 of the expansion working section E is expanded by the elastic operating mechanism 10, a part of the elastic body 5 is formed by the lower protruding end 3b of the bush 3 and the upper holding member. The elastic body 5 is elastically swelled and deformed downward through the annular space 15 between the outer surface of the elastic body 25 and the elastic swelled and deformed portion of the elastic body 5.
FIG. 6 shows a state in which the elastic bulging deformation portion of the elastic body 5 is received by the flat receiving surface 4 a of the receiving portion 4. There is a possibility that the reception is performed by the flat receiving surface 4a and the inclined reception surface 4b, and furthermore, there is a possibility that the reception is performed only by the inclined reception surface 4b of the receiving portion 4.
In particular, on the inclined receiving surface 4b of the receiving portion 4, the escape of the elastically swelling deformed portion of the elastic body 5 outward in the radial direction can be efficiently suppressed.

The free swinging mechanism D2 of the first form change mechanism D moves the upper holding member 25 and the lower holding member 26 apart from each other by the downward movement operation of the inner operation shaft 6 with respect to the outer operation shaft 7, thereby providing a third movable piece. 20 is a mechanism for changing the diameter of the through hole 2 into a free swing state in which the diameter can be changed to a reduced state in accordance with the contact with the outer opening edge 1a of the through hole 2 or the inner opening edge 1b of the through hole 2. D2 is configured using the release operation of the holding mechanism D1.
That is, the free swinging mechanism D2 has the structure of the holding mechanism D1 and also has the structure of the holding mechanism D1. Further, the operating part of the holding mechanism D1 and the operating part of the elastic operating mechanism 10 of the extension working unit E are configured in common. As shown in FIG. 14 and FIG. 15, an expansion / contraction operation nut 61 as a rotation operation unit for relatively moving the outer operation shaft 7 and the inner operation shaft 6 in the vertical direction is used.

  As shown in FIGS. 1, 4, and 5, the interval regulating means F provided in the free swing mechanism D2 includes a pair of first interval regulating members 31, a pair of second interval regulating members 32, and a pair of third intervals. It comprises a regulating member 33 and a pair of fourth interval regulating members 34.

The first interval regulating member 31 regulates the interval S1 between the upper holding member 25 and the first mounting member 21 of the third movable piece 20 of the first group to a set interval greater than the swing radius of the third movable piece 20.
More specifically, an intermediate portion of the first gap regulating member 31 is relatively movably inserted into a first insertion hole 21 a formed through the first mounting member 21, and an upper end of the first gap regulating member 31 is an upper holding member. A first head 31a is formed at the lower end of the first gap regulating member 31 and abuts against the lower surface of the first mounting member 21.
When the first head portion 31a of the first gap regulating member 31 is in contact with the lower surface of the first mounting member 21 by the separation movement of the upper holding member 25 and the lower holding member 26, the upper holding member 25 and the first mounting member 21 are in contact with each other. The distance between the third movable piece 20 and the member 21 is regulated to a set distance equal to or larger than the swing radius of the third movable piece 20.

The second spacing regulating member 32 regulates the spacing S2 between the upper holding member 25 and the second attaching member 22 of the third movable piece 20 in the second group to a set interval, thereby allowing the first attaching member 21 and the second attaching member 21 to be attached to each other. The space S3 between the third movable piece 20 and the member 22 is regulated to a set distance larger than the swing radius of the third movable piece 20 in cooperation with the first space regulating member 31.
More specifically, the intermediate portion of the second interval regulating member 32 is relatively movable to a second insertion hole 21b formed through the first mounting member 21 and a third insertion hole 22a formed through the second mounting member 22. The upper end of the second gap regulating member 32 is fixed to the upper holding member 25 by screwing or bonding, and the lower end of the second gap regulating member 32 is in contact with the lower surface of the second mounting member 22. A second head portion 32a for stopping is formed.
In a state where the second head 32a of the second gap regulating member 32 is in contact with the lower surface of the second mounting member 22 by the separation movement between the upper clamping member 25 and the lower clamping member 26, One head 31a is in contact with the lower surface of the first mounting member 21. Therefore, the space between the first mounting member 21 and the second mounting member 22 is set to be equal to or larger than the swing radius of the third movable piece 20 by the cooperation of the first space restricting member 31 and the second space restricting member 32. Be regulated.

The third interval regulating member 33 regulates the interval S4 between the first mounting member 21 and the lower holding member 26 to a set interval.
More specifically, the intermediate portion of the third space regulating member 33 is relatively movable to a fourth insertion hole 22b formed through the second mounting member 22 and a fifth insertion hole 26a formed through the lower holding member 26. It is inserted, and the upper end of the third gap regulating member 33 is fixed to the first mounting member 21 by screwing or bonding, and the lower end of the third gap regulating member 33 contacts the lower surface of the lower holding member 26. A third head 33a for retaining is formed.
When the third head 33a of the third gap regulating member 33 is in contact with the lower surface of the lower holding member 26 by the separation movement of the upper holding member 25 and the lower holding member 26, the first mounting member 21 and the lower An interval S4 between the holding member 26 and the holding member 26 is regulated to a set interval.

The fourth gap regulating member 34 regulates the gap S5 between the second mounting member 22 and the lower holding member 26 to a set gap larger than the swing radius of the third movable piece 20.
More specifically, an intermediate portion of the fourth gap regulating member 34 is relatively movably inserted into a sixth insertion hole 26b formed through the lower holding member 26, and an upper end of the fourth gap regulating member 34 is attached to the second mounting hole 26b. A fourth head portion 34 a is formed at the lower end of the fourth gap regulating member 34 and is in contact with the lower surface of the lower holding member 26.
In a state where the fourth head 34a is in contact with the lower surface of the lower holding member 26 when the upper holding member 25 and the lower holding member 26 move apart from each other, the fourth holding member 34 and the lower holding member 26 are in contact with each other. The distance between the third movable piece 20 and the member 26 is regulated to a set distance equal to or larger than the swing radius of the third movable piece 20.

When the third movable piece 20 is clamped and held by the clamping mechanism D1 from both sides of the operating shaft B in the axial direction, the first head 31a of the first gap regulating member 31 is attached to the second mounting member 22. An escape hole 22c into which a hole enters is formed.
When the third movable piece 20 is clamped and held by the clamping mechanism D1 from both sides of the operation shaft B in the axial direction, the first head 31a of the first gap regulating member 31 is attached to the lower clamping member 26. In addition, escape holes 26c and 26d into which the second head 32a of the second interval regulating member 32 enters are formed to penetrate.

[Second embodiment]
In the second enlargement / reduction operating device A2 according to the second embodiment of the present invention shown in FIGS. 8 to 13, the function of sealing the through hole 2 of the water pipe 1 and the inner opening edge 1b of the through hole 2 in the water pipe 1 are provided. On the other hand, a function of holding the second expansion / contraction operation device A2 at a predetermined insertion position against water pressure by locking from the axial direction is provided.
Further, as shown in FIG. 16 and FIG. 17, the second enlarging / reducing operation device A2 is an example of a coated tubular body C that covers the inner peripheral surface 2a of the through hole 2 of the water pipe 1, and includes a lining treatment layer 1A. And has a function of expanding and deforming the metal bush 3 having a length in the axial direction larger than the thickness of the water pipe 1 including the thickness of the water pipe 1 in a retaining state. The configuration will be described in detail.

As a basic configuration of the second expansion / contraction operation device A2, similarly to the second expansion / contraction operation device A2 of the above-described first embodiment, an operation shaft B that can be inserted into the through hole 2 of the water pipe 1 or the bush 3 is provided. The expansion / contraction means K which can be changed between a reduced diameter state where the diameter is smaller than the hole diameter of the through hole 2 of the water pipe 1 or the inner diameter of the bush 3 and an expanded state where the diameter is larger than the hole diameter of the through hole 2 of the water pipe 1 is provided. Is provided.
The expansion / contraction means K includes a plurality of movable pieces P arranged in the circumferential direction so as to be movable in the hole diameter direction of the through hole 2 with respect to the operation axis B, and the movable piece P is provided with a hole diameter of the through hole 2 or a bush. 3. A diameter-reduced state (see FIG. 8) in which the inner diameter of the through hole 2 is smaller than the inner diameter of the through hole 3, and a circular shape or a radially outer side in which the diameter of the through hole 2 is larger than the diameter of the through hole 2. A second form change mechanism G is provided for changing the state to an expanded state (see FIG. 9) that projects in a substantially circular shape.

Therefore, when inserting the expansion / contraction means K provided on the operation shaft B into the through hole 2 or the bush 3 of the water pipe 1, the plurality of movable pieces P arranged in the circumferential direction are moved by the second form changing mechanism G. Reduce the diameter. As a result, the plurality of movable pieces P retreat radially inward to a form having a smaller diameter than the hole diameter of the through hole 2 or the inner diameter of the bush 3. 3 can be smoothly inserted.
Next, when the plurality of movable pieces P inserted at the predetermined positions are expanded in diameter by the second configuration changing mechanism G, the plurality of movable pieces P are radially outward in a form having a diameter larger than the diameter of the through hole 2. It protrudes in a circular or substantially circular shape toward one side.
As a result, the plurality of movable pieces P changed from the reduced diameter state to the expanded diameter state are formed in a circular shape from the axial center direction with respect to the inner opening edge 1b of the through hole 2 in the water pipe 1 as shown in FIG. Alternatively, it can be configured as a retaining piece movable piece P for retaining in a substantially circular shape, or a lower protruding end of the bush 3 that covers the inner peripheral surface of the through hole 2 although not shown. It can be configured as a movable piece P for expansion processing that radially expands and deforms the portion 3b radially outward until it stops.

  As one of the bush expanding methods using the movable piece P for expansion processing, after changing the movable piece P to the expanded state, the lower protruding end portion 3b of the bush 3 is axially moved by the movable piece P in the expanded state. A method in which the lower protruding end portion 3b of the bush 3 is expanded and deformed so as to prevent the lower end portion 3b from being pulled out by pressing from the direction. As another method, the movable piece P in the reduced diameter state is arranged in the lower protruding end portion 3b of the bush 3 to be expanded, and the operation of changing the movable piece P in the reduced diameter state to the expanded state is performed. A method of increasing the diameter of the lower protruding end 3b of the bush 3 so as to prevent the bush 3 from falling off can be used.

Further, similarly to the first enlarging / reducing operation device A1 of the first embodiment, the movable piece P is attached to the operation shaft B in a state where the movable piece P is locked to the inner surface side opening edge 1b of the through hole 2. A cylindrical elastic body 5 that is elastically swellable and deformable radially outward and is disposed at a portion facing the inner peripheral surface 2a or the inner peripheral surface of the bush 3; An expansion operation unit E is provided with an elastic operation mechanism 10 that changes between a contracted state in which the diameter is smaller than the inner diameter of the through hole 3 and a swelled state in which the diameter is larger than the hole diameter of the through hole 2.
The configuration of the extension working unit E is substantially the same as the configuration or function of the extension working unit E described in the first enlargement / reduction operation device A1 of the first embodiment. The same reference numerals as in the first embodiment denote the same parts, and a description thereof will be omitted.
Further, at least a part of the movable piece P is provided with a receiving portion 4 for receiving the elastic expansion deformation of the elastic body 5 from the axial direction of the operation shaft B due to the change of the elastic operation mechanism 10 to the expanded state. .

Next, the enlarging / reducing means K of the second enlarging / reducing operation device A2 will be described in detail.
The movable piece P of the expanding / contracting means K includes a tapered metal or resin first movable piece 41 whose circumferential direction width increases toward the upper end, which is one end of the operating shaft B in the axial direction, and an operating shaft. It is configured by alternately arranging, in the circumferential direction, a tapered metal or resin second movable piece 42 whose circumferential direction width increases toward the lower end side which is the other end side in the axial direction of B. I have.
The tapered sides 41a, 41b on both sides in the circumferential direction of the first movable piece 41 and the tapered sides on both sides in the circumferential direction of the second movable piece 42, whose taper directions (gradient directions) are in the opposite relationship. Among the sides 42a, 42b, both sides 41a, 42b adjacent in the circumferential direction and the sides 41b, 42a are slidably contact in the axial direction.
By sliding the first movable piece 41 and the second movable piece 42 in the axial direction, an arc-shaped outer surface 41c of the first movable piece 41 and an arc-shaped outer surface 41c of the second movable piece 42 are formed. The outer diameter of the circular outer surface changes continuously.

The second mode changing mechanism G is a diameter changing mechanism G1 that relatively moves the first movable piece 41 and the second movable piece 42 in the axial direction until the first movable piece 41 and the second movable piece 42 have a diameter larger than the diameter of the through hole 2. The first movable piece 41 and the second movable piece 42 are axially moved to a reduced diameter state in which the diameter of the first movable piece 41 and the second movable piece 42 becomes smaller than the hole diameter of the through hole 2 or the inner diameter of the bush 3 with the diameter expansion canceling operation of the diameter expansion changing mechanism G1. It is composed of a diameter reduction mechanism G2 that moves relatively away in the center direction.
Therefore, when the first movable piece 41 and the second movable piece 42 are relatively separated and moved along the axial direction by the diameter reduction mechanism G2, the arc-shaped outer surface 41c of the first movable piece 41 and the second movable piece 42 The outer diameter of the circular outer surface formed by the arc-shaped outer surface 42c is reduced to a reduced diameter state in which the outer diameter is smaller than the hole diameter of the through hole 2 or the inner diameter of the bush 3.
When the first movable piece 41 and the second movable piece 42 are moved relatively close to each other in the axial direction by the diameter changing mechanism G1, the arc-shaped outer surface 41c of the first movable piece 41 and the second movable piece 42 are moved. The outer diameter of the circular outer surface formed by the arc-shaped outer surface 42c is increased to an expanded state in which the outer diameter is larger than the diameter of the through hole 2.
In this embodiment, three (one or more examples) of the first movable pieces 41 are arranged in the circumferential direction, and three (one or more examples) of the second movable pieces 42 are also arranged in the circumferential direction.

The first movable piece 41 and the second movable piece 42 constitute a cylindrical body having the maximum outer diameter in which the upper sides 41d and 42d and the lower sides 41e and 42e match each other when in the expanded state. The first movable piece 41 and the second movable piece 42 move up and down in the axial direction as the state changes from the diameter-expanded state to the diameter-reduced state. The small width side portion 41b and the small width side portions of the side edges 42a and 42b of the second movable piece 42 overlap. As shown in FIG. 10, between the opposing surfaces of the large side portions of the sides 41 a and 41 b of the first movable piece 41 and the large side portions of the sides 42 a and 42 b of the second movable piece 42 excluding the overlapped portion. A substantially triangular void 43 is generated.
The arcuate inner surface 41f of the first movable piece 41 and the arcuate inner surface 42f of the second movable piece 42 contact the outer peripheral surface of the inner operation shaft 6 in the reduced diameter state, and shift from the reduced diameter state to the increased diameter side. As a result, the inner operation shaft 6 gradually separates radially outward from the outer peripheral surface.

Next, the diameter changing mechanism G1 of the second mode changing mechanism G will be described.
A second upper holding member 45 having a diameter smaller than the diameter of the through hole 2 or the inner diameter of the bush 3 is provided in the lower shaft portion of the inner operation shaft 6 protruding downward from the lower end of the outer operation shaft 7 in the axial direction. A second lower holding member 46 having a diameter smaller than the inner diameter of the bush 3 is fixed to the lower end of the inner operation shaft 6 so as to be slidable. The second upper holding member 45 is formed integrally with the rear side portion (lower side portion) of the lower pressing member 12 which is a component of the elastic operating mechanism 10 of the expansion working section E.
On the opposing surfaces of the second upper holding member 45 and the second lower holding member 46, a plurality of first movable pieces 41 and second movable pieces 42 alternately arranged in the circumferential direction are provided in the axial direction. Frusto-conical second holding surfaces 45a and 46a are formed.

Then, the second upper holding member 45 and the second lower holding member 46 are moved by the relative movement operation between the outer operation shaft 7 and the inner operation shaft 6, in other words, by the upward movement operation of the inner operation shaft 6 with respect to the outer operation shaft 7. Is moved closer, the second holding surface 45a of the second upper holding member 45 contacts only the upper side 41d of the first movable piece 41, and the second holding surface 46a of the second lower holding member 46 It contacts only the lower side 42e of the movable piece 42.
When the second upper holding member 45 and the second lower holding member 46 move closer to each other in this contact state, the first movable piece 41 and the second movable piece 42 move relatively closer to each other along the axial direction. The outer diameter of the circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42 is in an expanded state in which the outer diameter is larger than the hole diameter of the through hole 2. Expand the diameter up to. When the maximum diameter is reached, the second holding surface 45a of the second upper holding member 45 comes into contact with the upper side 41d of the first movable piece 41 and the upper side 42d of the second movable piece 42, and the second lower holding member 46 The second holding surface 46a contacts the lower side 41e of the first movable piece 41 and the lower side 42e of the second movable piece 42. In this maximum diameter expanded state, the movable piece 41 and the second movable piece 42 are clamped and fixed between the second upper clamping member 45 and the second lower clamping member 46.

The diameter changing mechanism G2 of the second form changing mechanism G is a diameter changing mechanism that moves the second upper holding member 45 and the second lower holding member 46 away from each other by moving the inner operation shaft 6 downward with respect to the outer operation shaft 7. The moving function of the mechanism G1 is used, and further, it can be wound and mounted on a circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42, In addition, in the wound mounting state, an annular elastic body 47 such as rubber, which applies a moving force to the first movable piece 41 and the second movable piece 42 toward the diameter reducing side, is provided as a main configuration.
Also, the upper side 41d of the first movable piece 41 and the upper side 42d of the second movable piece 42 are brought into contact with the second holding surface 45a of the second upper holding member 45 in the form of a truncated cone from the axial center direction. , Conical upper guide recesses 41 g and 42 g for guiding the radial movement of the first movable piece 41 and the second movable piece 42, and the lower side 41 e of the first movable piece 41 and the second movable The lower side 42e of the piece 42 is brought into contact with the frusto-conical second holding surface 46a of the second lower holding member 46 from the axial center direction, thereby forming the first movable piece 41 and the second movable piece 42. Conical lower guide recesses 41h and 42h are formed to guide the expansion and contraction movement in the radial direction.

  The relative movement between the outer operation shaft 7 and the inner operation shaft 6, in other words, the lower operation of the inner operation shaft 6 with respect to the outer operation shaft 7, causes the second upper holding member 45 and the second lower holding member 46 to move. Are moved away from each other, the diameter of the annular elastic body 47 wound around the circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42 is reduced. Due to the force, the first movable piece 41 and the second movable piece 42 move relatively away from each other along the axial direction, and the arcuate outer surface 41c of the first movable piece 41 and the arcuate outer surface 42c of the second movable piece 42 move. The outer diameter of the formed circular outer surface is reduced to a reduced diameter state in which the outer diameter is smaller than the hole diameter of the through hole 2 or the inner diameter of the bush 3.

Next, the receiving portion 4 formed on at least a part of the first movable piece 41 and the second movable piece 42 will be described.
As shown in FIG. 17, of the first movable piece 41 and the second movable piece 42, which are clamped and fixed in an expanded state between the second upper clamping member 45 and the second lower clamping member 46, the lower pressing is performed. The receiving portion 4 is formed of an annular or substantially annular annular piece projecting radially outward from the outer surface of the second upper holding member 45 formed integrally with the rear side portion of the member 12.
The receiving portion 4 is formed on an inclined receiving surface 4c (see FIG. 9) which is located closer to the elastic body 5 side of the expansion working portion E as it goes radially outward.

  Then, as shown in FIGS. 16 and 17, when the elastic body 5 of the expansion working unit E is expanded by the elastic operation mechanism 10, a part of the elastic body 5 is connected to the lower projecting end 3 b of the bush 3. The elastic swelling portion of the elastic body 5 is elastically swelled and deformed downward through the annular space between the second upper holding member 45 and the outer surface. Can be.

The second form changing mechanism G is provided with a linking mechanism H for linking the first movable piece 41 and the second movable piece 42 movably within a certain range in the axial direction and the radial direction.
This linking mechanism H links a first linking mechanism H1 that links the second upper holding member 45 and the three first movable pieces 41, and links a second lower holding member 46 and the three second movable pieces 42. And a third linkage mechanism H3 that links the first movable piece 41 and the second movable piece 42 that are alternately arranged along the circumferential direction.

  The first linking mechanism H1 is provided with an engaging head 51a at the mounting center position of the three first movable pieces 41 in the frusto-conical surface of the second holding surface 45a of the second upper holding member 45. One engagement pin 51 is protruded. On the other hand, at the center in the circumferential direction of the arc-shaped inner surface 41f of each first movable piece 41, it is detachable from the radially outer side with respect to the first engaging pin 51 of the second holding surface 45a, and In the engaged state, a first engaging groove 52 having a flexibility to allow axial movement along the frusto-conical surface of the second holding surface 45a is formed.

  The second linking mechanism H2 has an engaging head 53a at the center of attachment to the three second movable pieces 42 of the frusto-conical surface of the second holding surface 46a of the second lower holding member 46. The second engaging pin 53 is provided to project. On the other hand, at the center in the circumferential direction of the arc-shaped inner surface 42f of each second movable piece 42, the second engaging pin 53 of the second holding surface 46a can be freely disengaged from the radially outward side, and In the engaged state, a second engagement groove 54 is formed with flexibility to allow axial movement along the frusto-conical surface of the second holding surface 46a.

  The third linking mechanism H3 has a small width of one side 41a, 42a that is adjacent in the circumferential direction among the two sides 41a, 41b of the first movable piece 41 and the sides 42a, 42b of the second movable piece 42. A third engagement pin 55 protruding outward in the circumferential direction protrudes from the side portion. A third engagement pin 55 can be engaged with the other side 41b, 42b adjacent in the circumferential direction from the circumferential direction, and the shaft in the range from the reduced diameter state to the expanded diameter state in the engaged state. A slit-shaped third engagement groove 56 that allows relative movement between the first movable piece 41 and the second movable piece 42 in the core direction is formed.

[Third embodiment]
14 and 15 show a third embodiment in which the first enlarging / reducing device A1 of the first embodiment of the present invention is used as a bush mounting machine.
In the branch structure of the water pipe system of this embodiment, a split T-shaped joint having a split structure in which a branch pipe portion 100 communicating with the through hole 2 of the water pipe 1 from the axial center direction is provided at a branch formation point of the water pipe 1. 101 is externally fixed with a sealing member 102 for sealing interposed between the outer peripheral surface of the water pipe 1. One or a plurality of branch pipes 103 are flange-bonded to the branch pipe section 100 of the split T-joint 101, and the first expansion / contraction operation device A1 is vertically movable to the uppermost branch pipe 103. , A bush insertion device 200 is mounted.
Therefore, the bush mounting machine of the third embodiment includes the first expansion / contraction operation device A1 and the bush insertion device 200 of the first embodiment of the present invention.

Various forms of the bush insertion device 200 have been conventionally developed, and any of these forms can be used.
The bush insertion device 200 used in this embodiment includes a boss 201 for vertically supporting the inner operation shaft 6 and the outer operation shaft 7 constituting the operation shaft B in the uppermost branch pipe 103. The first bearing member 202 is attached. A second bearing member 204 is attached over an upper end portion of a connection support shaft 203 screwed and fixed to a plurality of locations of the first bearing member 202, and extends over the first bearing member 202 and the second bearing member 204. A feed screw shaft 206 having an operation handle 205 is attached.
Further, a screw piece 208 screwed to the screw shaft portion 206A of the feed screw shaft 206 is attached to the lifting connection member 207 attached to the upper end of the outer operation shaft 7 in a state in which it cannot be relatively rotated. The screw shaft portion 6a is brought into contact with the lifting / lowering connecting member 207 via the thrust bearing 60, and the outer operation shaft 7 and the inner operation shaft 6 are relatively moved vertically by screwing operation in the contact state. An expansion / contraction operation nut 61 as an operation portion is screwed.

The expansion / contraction operation nut 61 is configured as a common rotation operation unit that operates the elastic operation mechanism 10 of the expansion working unit E and the holding mechanism D1 that also serves as the free swing mechanism D2.
That is, the expansion / contraction operation nut 61 functions to pinch and operate the holding mechanism D1 constituting the first mode changing mechanism D of the first expansion / contraction operation device A1, and to change the free swing mechanism D2 to the free swing state ( In other words, the function of controlling the holding mechanism D1 to release the holding operation) and the function of switching the elastic operation mechanism 10 of the expansion working unit E between the compression operation state and the compression release operation state.
Further, in order to prevent the inner operation shaft 6 from moving upward due to water pressure, the lifting connection member 207 is provided with a lifting restricting member 62 abutting on the upper end of the expansion / contraction operation nut 61 so as to be detachable with a bolt 63 or the like.

Then, as a preparatory work before the feeding operation of the first expansion / contraction operation device A1 by the bush insertion device 200, the bush 3 is attached to a predetermined position of the elastic body 5 of the expansion working unit E, and the first form changing mechanism D is free. The swing mechanism D <b> 2 is set in a free swing state, and in this state, the ascending / restricting member 62 abutting on the upper end of the expanding / contracting operation nut 61 is attached to the elevating / lowering connecting member 207.
After this preparation work, the first expansion / contraction operation device A1 is fed by operating the operation handle 205 of the bush insertion device 200. During this feeding, the third movable piece 20 of each group swings in a reduced diameter state with the contact with the outer opening edge 1 a of the through hole 2, and after passing through the through hole 2, returns to its original diameter. Returns to the state. FIG. 14 shows the state at the time of the return, and FIG. 1 shows the details of the main part of the first scaling device A1.

As shown in FIG. 15, in a state in which the expansion working unit E of the first expansion / contraction operation device A, the third movable piece 20 of each group, and the first form change mechanism D are inserted at predetermined positions, as shown in FIG. The lifting control member 62 in contact with the upper end is removed from the lifting connection member 207. Then, the inner operating shaft 6 is raised by the water pressure, and the third movable pieces 20 of each group are clamped between the upper clamping member 25 and the lower clamping member 26 of the clamping mechanism D1, and the third movable piece of the first group is moved. As shown in FIG. 7, the second movable member 20 and the third movable piece 20 of the second group alternately enter in the circumferential direction along a plane passing through the contact surfaces of the first and second mounting members 21 and 22, and The upper and lower surfaces are clamped and fixed in a disc-shaped enlarged state in which the upper and lower surfaces are aligned.
In this state, since the compression of the elastic body 5 of the expansion working unit E is insufficient, the elastic body 5 of the expansion working unit E is further compressed by rotating the expansion / contraction operation nut 61. Due to the elastic swelling deformation of the elastic body 5, the upper protruding portion and the lower protruding portion of the bush 3 are radially outwardly deformed so as to be prevented from falling out in the radial direction. Thereby, the bush 3 is brought into close contact with the inner peripheral surface of the through-hole 2 of the water pipe 1 including the lining treatment layer 1A with the elastic layer 3B thereof in a pressure-contact state.

[Fourth embodiment]
16 and 17 show a fourth embodiment in which the second enlarging / reducing device A2 according to the second embodiment of the present invention is used as a bush mounting machine.
The branch structure of the water supply pipe system of the fourth embodiment and the bush insertion device 200 attached to the uppermost branch pipe 103 are the same as those of the above-described third embodiment. The same reference numerals as those in the third embodiment denote the same parts, and a description thereof will be omitted.
A second expansion / contraction operation device A2 is attached to the bush insertion device 200 instead of the first expansion / contraction operation device A1.

  Then, the bush 3 is attached to a predetermined position of the elastic body 5 of the expansion working section E as a preparation work before the feeding operation of the second expansion / contraction operation device A2 by the bush insertion device 200. Further, the first movable piece 41 and the second movable piece 42 are relatively separated and moved along the axial direction by the diameter reducing urging force of the annular elastic body 47 constituting the diameter reducing mechanism G2 of the second form changing mechanism G. Then, the outer diameter of the circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42 is reduced to a smaller diameter than the hole diameter of the through hole 2. (See FIG. 8). In this state, the ascending / restricting member 62 abutting on the upper end of the expanding / contracting operation nut 61 is attached to the elevating / lowering connecting member 207.

After this preparation work, the operation handle 205 of the bush insertion device 200 is operated to feed the second expansion / contraction operation device A2. As shown in FIG. 17, with the first movable piece 41 and the second movable piece 42 in the reduced diameter state and the first movable piece 41 and the second movable piece 42 in the reduced diameter state inserted into the expansion operation portion E of the second expansion / contraction operation device A2, as shown in FIG. The lifting control member 62 in contact with the upper end of the lifting member is removed from the lifting connection member 207. Then, the inner operating shaft 6 rises due to the water pressure, and is pressed by the second upper holding member 45 and the second lower holding member 46 so that the first movable piece 41 and the second movable piece 42 extend in the axial direction. It is moved relatively close. Thereby, the outer diameter of the circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42 becomes larger than the hole diameter of the through hole 2. The diameter is expanded to the state (see FIG. 9).
In this state, since the compression of the elastic body 5 of the expansion working unit E is insufficient, the elastic body 5 of the expansion working unit E is further compressed by rotating the expansion / contraction operation nut 61. Due to the elastic swelling deformation of the elastic body 5, the upper protruding portion and the lower protruding portion of the bush 3 are radially outwardly deformed so as to be prevented from falling out. Thereby, the bush 3 is brought into close contact with the inner peripheral surface of the through-hole 2 of the water pipe 1 including the lining treatment layer 1A with the elastic layer 3B thereof in a pressure-contact state.

[Fifth Embodiment]
FIG. 18 shows a fifth embodiment in which the second expansion / contraction operation device A2 according to the second embodiment of the present invention is used as a branch flow path breaker. In this embodiment, the through hole 2 of the water pipe 1 is sealed in a watertight state by the elastic body 5 of the expansion working section E. Therefore, the details of the scaling means K of the second scaling device A2 are as described in the second embodiment.
In the branch structure of the water supply piping system of the fifth embodiment, the branch pipe 103 flanged to the branch pipe part 100 of the split T-joint 101 is provided with the inner operation shaft 6 and the outer operation shaft 7 constituting the operation shaft B. A work case 120 that penetrates and supports in a vertical direction is attached.
A cylindrical attachment member 122 is detachably attached to the upper end of the outer operation shaft 7 projecting upward from the top plate 121 of the work case 120 by a plurality of bolts 123. In order to prevent the inner operation shaft 6 from rising and moving due to water pressure, the mounting member 122 is provided with a lift restricting member 124 abutting on the upper end of the inner operation shaft 6 so as to be detachable with a bolt 125 or the like.

  In the fifth embodiment, a pair of manually winding winches 300 is used as a simple type of feeding device of the second expansion / contraction operation device A2. The hooks 303 at both ends of the chain 302 extended from the winch main body 301 of each winch 300 are engaged with a mounting ring 304 provided on the top plate 121 of the working case 120 and a mounting ring 305 provided on the mounting member 122. By operating the lever 306 of the winch main body 301 in the state, the second enlargement / reduction operating device A2 can be sent to a predetermined position.

[Sixth embodiment]
FIGS. 19 to 24 show a modification of the first enlarging / reducing device A1 described in the first embodiment of the present invention, which is a branch flow channel breaker that seals the through hole 2 of the water pipe 1 from the inside of the pipe. It is used when the water tightness of the bush 3 mounted on the inner peripheral surface of the through hole 2 of the water pipe 1 is checked by a hydraulic test or the like.
The improvement to the branch passage breaker is to remove the extended working part E from the operating shaft B, and to attach it to the lower end of the outer operating shaft 7 of the operating shaft B and to replace the outer periphery of the inner operating shaft 6. The upper holding member 25 slidable in the axial direction along the surface has a through hole between the third movable piece 20 in the expanded state and the inner opening edge 1 b of the through hole 2 of the water pipe 1. An annular rubber elastic seal member 70 capable of sealing the through-hole 2 by being in annular contact with the inner opening edge 1b of the inner surface 2 from the branch axis direction is attached.
This elastic sealing material 70 is configured to have an outer diameter larger than the diameter of the through-hole 2 in the no-load state (natural state) and the outer diameter of the third movable piece 20 in the expanded state. The hole diameter of the through hole 2 or the bushing with the contact with the outer side opening edge 1a or the inner surface side opening edge 1b, or with the contact with the upper end edge or the lower end edge of the bush 3 attached to the through hole 2. 3 is configured to be able to bend and deform to a form having a smaller diameter than the inner diameter.
The outer peripheral portion 70a, which is an annular peripheral portion of the elastic seal material 70, is configured to have a larger thickness in the axial direction than other portions, and the thick outer peripheral portion 70a of the elastic seal material 70 is in an expanded state. An annular or substantially annular annular piece portion on the outer peripheral side of the third movable piece 20, that is, an annular protrusion 20A whose outer peripheral side projects toward the inner peripheral surface side of the water pipe 1 is fitted from the axial center direction. A mating groove 70b is formed.

A pressing mechanism 71 that presses the thick outer peripheral portion 70a of the elastic seal material 70 toward the inner opening edge 1b of the through hole 2 in the water pipe 1 via the annular projecting portion 20A of the third movable piece 20 in the expanded state. Is provided. The pressing mechanism 71 includes an expansion / contraction operation nut 61 screwed to the upper screw shaft portion 6a of the inner operation shaft 6.
The expansion / contraction operation nut 61 is rotated in a state in which it is in contact with the upper end surface of the outer operation shaft 7 to move the inner operation shaft 6 upward with respect to the outer operation shaft 7, thereby increasing the diameter of the outer operation shaft 7. (3) The thick outer peripheral portion 70a of the elastic sealing material 70 is pressed against the inner opening edge 1b side of the through hole 2 in the water pipe 1 by the annular projecting portion 20A of the movable piece 20 to seal in a watertight state.

Next, the operation of sealing the through-hole 2 of the water pipe 1 by the branch channel breaker configured as described above will be described.
As shown in FIGS. 19 and 20, as a preparatory operation before the feeding operation of the first enlarging / reducing operation device A1 by the manual winding type winch 300 as the feeding device, the free swing mechanism D2 of the first form changing mechanism D is used. Is set in a free swinging state, and in this state, the ascending restricting member 124 abutting on the upper end of the upper screw shaft portion 6a of the inner operation shaft 6 is attached to the attaching member 122.
After this preparatory work, the lever 306 of the winch main body 301 is operated to feed the expanding / contracting means K and the elastic sealing material 70 of the first expanding / contracting operation device A1 to a predetermined position in the water pipe 1.
During this feeding, the third movable piece 20 of each group swings to a reduced diameter state in which the diameter becomes smaller than the inner diameter of the bush 3 with the contact with the upper end edge of the bush 3 mounted in the through hole 2. And moves through the bush 3 in the reduced diameter state. Following the third movable piece 20, the elastic sealing material 70 abuts on the upper edge of the bush 3 mounted in the through hole 2. The elastic sealing material 70 also flexes and deforms to a reduced diameter state smaller than the inner diameter of the bush 3 with the contact with the upper end edge of the bush 3, and passes through the bush 3 in the flexed deformation state.
The third movable piece 20 and the elastic sealing material 70 of each group elastically return to their original enlarged state immediately after passing through the bush 3. The state at the time of this return is shown in FIG. 19 and FIG.

Next, as shown in FIGS. 19 and 20, the operation nut 61 for expansion and contraction screwed to the inner operation shaft 6, which is an example of the pressing mechanism 71, is operated to move the inner operation shaft 6 to the outer operation shaft 7. Move upward. Then, as described in detail in the first embodiment, the third movable pieces 20 of each group are clamped between the upper clamping member 25 and the lower clamping member 26 of the clamping mechanism D1, and the third movable piece 20 of the first group is moved. The pieces 20 and the third movable pieces 20 of the second group alternately enter in the circumferential direction along a plane passing through the contact surfaces of the first and second mounting members 21 and 22, and the upper surfaces thereof are connected to each other. And it is clamped and fixed in a disk-shaped expanded state in which the lower surfaces are aligned (see FIGS. 6 and 7).
The annular or substantially annular annular piece portion on the outer peripheral side of the third movable piece 20 in the expanded state is fitted into the fitting groove 70b of the thick outer peripheral portion 70a of the elastic sealing material 70 from the axial center direction. Combine.
Further, when the operation nut 61 for expansion and contraction of the inner operation shaft 6 is operated to move the inner operation shaft 6 upward with respect to the outer operation shaft 7, the third movable member having a circular or substantially circular shape in the expanded state is obtained. The annular thick outer peripheral portion 70a of the elastic sealing material 70 is pressed against the inner opening edge 1b of the through hole 2 in the water pipe 1 in a watertight manner via the annular projecting portion 20A of the piece 20. Thereby, the thick outer peripheral portion 70a of the elastic sealing material 70 is pressed in a circular shape on the inner opening edge of the through hole 2 in the water pipe 1, and the through hole 2 of the water pipe 1 can be reliably sealed.
A plurality of movable pieces P can be dispersedly supported at a wide circular or substantially circular contact portion that contacts the inner opening edge 1b of the through hole 2.

In this embodiment, in a state where the through hole 2 of the water pipe 1 is sealed, pressure water is injected from the water supply part 120A of the work case 120, and the outer peripheral surface of the bush 3 and the inner circumference of the through hole 2 of the water pipe 1 are injected. A water pressure test is performed to determine whether or not pressurized water infiltrates between the inner peripheral surface of the water pipe 1 and the outer peripheral surface of the lining treatment layer 1A. By this water pressure test, the water stopping performance of the bush 3 attached to the through hole 2 of the water pipe 1 is confirmed.
Although not shown, a water supply pipe having an open / close valve is connected to the water supply section 120A of the work case 120.

Next, as shown in FIGS. 23 and 24, the inner operation shaft 6 is moved downward with respect to the outer operation shaft 7 by operating the expansion / contraction operation nut 61 screwed to the inner operation shaft 6. As a result, the free swinging mechanism D2 of the first mode changing mechanism D is in a free swinging state, and in this free swinging state, the ascending regulating member 124 abutting on the upper end of the upper screw shaft portion 6a of the inner operation shaft 6 is attached. Attach to 122. After that, the lever 306 of the winch main body 301 is operated to pull up the expansion / contraction means K and the elastic sealing material 70 of the first expansion / contraction operation device A1 into the work case 120.
During this pulling up, the elastic sealing material 70 comes into contact with the lower edge of the bush 3 mounted in the through hole 2. The elastic sealing material 70 is bent and deformed to a reduced diameter state in which the inner diameter of the bush 3 is smaller than the inner diameter of the bush 3 in contact with the lower edge of the bush 3, and passes through the bush 3 in the bent and deformed state. Subsequent to the elastic sealing material 70, the third movable pieces 20 of each group are brought into a reduced diameter state in which the diameter becomes smaller than the inner diameter of the bush 3 with the contact with the lower edge of the bush 3 mounted in the through hole 2. And passes through the bush 3 in the reduced diameter state. This passing state is shown in FIGS.
The third movable piece 20 and the elastic sealing material 70 of each group elastically return to their original enlarged state immediately after passing through the bush 3.

[Seventh embodiment]
FIG. 25 shows a seventh embodiment in which the first enlarging / reducing device A1 described in the first embodiment of the present invention is assembled as a sleeve mounting machine.
In the branch structure of the water supply pipe system of this embodiment, the flange 81 of the branch pipe portion 80 integrally formed with the water pipe 1 is engaged with the corner on the radially inner side of the flange 81 from above. A metal sleeve holding tube 82 having an engaging portion 82a and fitted in the branch pipe portion 80 in a sliding contact state, and disposed in contact with the outer peripheral surface of the annular engaging portion 82a of the sleeve holding tube 82. An annular gasket 83 to be formed and a metal groove forming ring 84 for forming a mounting groove portion of the gasket 83 between the annular engaging portion 82a of the sleeve holding cylinder 82 at a radially outer side portion of the gasket 83. And are arranged.

The sleeve holding cylinder 82 includes an annular engaging portion 85 a that engages from above with a radially inner corner of the upper end surface of the sleeve holding cylinder 82, and an inner peripheral surface of the branch pipe 80. A metal rust-preventive sleeve 85, which is an example of a coated tubular body covering the entire rust-prevention target area, has a lower end formed with a through-hole of the lining treatment layer 1A (a through-hole formed in a flow path forming wall portion). For example, the device is disposed in a state of being penetrated by 2.
A plate flange 86 is detachably attached to the flange 81 of the branch pipe portion 80 via bolts 87 and nuts 88, so that the sleeve is maintained in a watertight state between the flange 81 of the branch pipe portion 80 and the plate flange 86. The retaining cylinder 82 and the rust-preventive sleeve 85 are fitted and secured.
A seal material 89 for sealing between the inner peripheral surface of the sleeve holding cylinder 82 and the outer peripheral surface of the rust-preventive sleeve 85 is provided. An elastic layer 90 for sealing between the layer 1A and the through hole 2 is formed.
Also, of the inner operation shaft 6 and the outer operation shaft 7 constituting the operation shaft B, the lower half portion of the outer operation shaft 7 has a large-diameter enlarged-diameter molding that comes into contact with or comes close to the inner peripheral surface of the rust prevention sleeve 85. It is formed on the auxiliary cylinder 7A.

Then, in a state where the pressure connecting member 91 is detached, the inner operation shaft 6 is moved upward with respect to the outer operation shaft 7 by operating the expansion / contraction operation nut 61 screwed to the inner operation shaft 6. Let it. Then, as described in detail in the first embodiment, the third movable pieces 20 of each group are clamped between the upper clamping member 25 and the lower clamping member 26 integrally formed at the lower end of the outer operation shaft 7. The third movable piece 20 of the first group and the third movable piece 20 of the second group alternately enter in a circumferential direction along a plane passing through the contact surfaces of the first and second mounting members 21 and 22. The upper and lower surfaces are clamped and fixed in a disk-shaped enlarged state in which the upper and lower surfaces are aligned (see FIGS. 6 and 7).
The annular or substantially annular annular piece portion on the outer peripheral side of the third movable piece 20 in the expanded state abuts on the lower protruding end of the rust prevention sleeve 85.

Next, the upper end of the inner operation shaft 6 and the pressure connection member 91 are connected, and between the pressure connection member 91 and the plate flange 86, the lower protruding end of the rust prevention sleeve 85 is prevented from coming off. A hydraulic jack 92 is provided as an expansion power source for radially expanding the diameter to the state.
When the hydraulic jack 92 is extended in this state, the annular piece portion on the outer peripheral side of the third movable piece 20 in the expanded diameter state is pressed against the lower protruding end of the rust prevention sleeve 85 from the axial center direction. . Along with this pressing action, the lower protruding end portion of the rust prevention sleeve 85 is bent and deformed radially outward with the opening edge of the inner surface of the through hole 2 of the lining treatment layer 1A substantially as a bending starting point. (3) The diameter of the movable piece 20 is increased along the inclined surface or the curved surface in the annular piece portion on the outer peripheral side. As a result, the lower protruding end of the rust-preventive sleeve 85 is formed on the outer peripheral surface of the elastic layer 90 with the elastic layer 90 in close contact with the inner peripheral surface of the through hole of the lining treatment layer 1A in a pressure-contact state. The attached adhesive layer is engaged and attached while being strongly adhered to the inner peripheral surface 2 a of the through hole 2.

In the present embodiment, the inclined surface or the curved surface of the annular piece portion on the outer peripheral side, which is a part of the third movable piece 20, is configured as an expanded portion for forming the lower protruding end portion of the anticorrosive sleeve 85 into a larger diameter. Have been.
Then, by a rational improvement in which a part of the third movable piece 20 oscillated from the reduced diameter state to the expanded diameter state is used as an expanded portion, the entire circumference or substantially the entire lower protruding end of the rust prevention sleeve 85 is provided. The entire circumference can be reliably expanded and deformed.

  The operation of changing the diameter of the third movable piece 20 from the reduced diameter state to the expanded diameter state or the operation of changing the diameter of the first movable piece 41 and the second movable piece 42 from the reduced diameter state to the expanded diameter state is utilized. The entire circumference or substantially the entire circumference of the lower protruding end of the rust prevention sleeve 85 may be expanded and deformed. Also in this case, a part of the third movable piece 20 or a part of the first movable piece 41 and the second movable piece 42 is expanded so that the coated cylindrical body C such as the rust-proof sleeve 85 is formed in a diameter-prevented state. This constitutes a processing part.

[Eighth Embodiment]
FIG. 26 shows an eighth embodiment in which the second enlargement / reduction operation device A2 described in the first embodiment of the present invention is assembled as a sleeve mounting machine.
Also in the branch structure of the water supply piping system of this embodiment, the main components such as the sleeve holding cylinder 82 and the rust prevention sleeve 85 are the same or substantially the same as those of the seventh embodiment.
The difference is that substantially the entire outer operation shaft 7 is formed in a large-diameter expanded auxiliary cylinder portion that is in contact with or close to the inner peripheral surface of the rust prevention sleeve 85. A flange portion 7B to which a hydraulic jack 92 serving as an expansion power source for expanding the lower protruding end portion of the rust prevention sleeve 85 in diameter is integrally formed.
Further, on the operation shaft B, an annular or substantially annular annular piece portion on the outer peripheral side of the first movable piece 41 and the second movable piece 42 in the expanded state is provided on the lower protruding end of the rust prevention sleeve 85. In the locked state, a cylindrical elastic body 5 elastically swellable and deformable outward in the radial direction, which is disposed at a portion of the lining treatment layer 1A facing the inner peripheral surface of the through hole 2, and an elastic body. An expansion working unit E provided with an elastic operating mechanism 10 for changing the state 5 into a contracted state where the diameter is smaller than the hole diameter of the through hole 2 or the inner diameter of the bush 3 and a swelled state where the diameter is larger than the hole diameter of the through hole 2. Is provided.
Further, a pressure connection member 91 is attached over the upper end portions of the plurality of connection support shafts 93 attached to the plate flange 86.

Then, in a state in which the pressure connecting member 91 is removed, the operation nut 61 for expansion and contraction screwed to the upper screw shaft portion 6a of the inner operation shaft 6 is operated to move the inner operation shaft 6 to the outer operation shaft 7. To move upward. Then, as described in detail in the second embodiment, the first movable piece 41 and the second movable piece 42 are pressed by the second upper holding member 45 and the second lower holding member 46 along the axial direction. Are moved relatively close to each other. Thereby, the outer diameter of the circular outer surface formed by the arc-shaped outer surface 41c of the first movable piece 41 and the arc-shaped outer surface 42c of the second movable piece 42 becomes larger than the hole diameter of the through hole 2. The diameter is expanded to the state (see FIG. 9).
The annular or substantially annular annular piece portion on the outer peripheral side of the first movable piece 41 and the second movable piece 42 in the diameter-expanded state abuts or approaches the lower protruding end of the rust prevention sleeve 85.

Next, the upper end of the inner operation shaft 6 and the pressure connection member 91 are connected, and between the pressure connection member 91 and the plate flange 86, the lower protruding end of the rust prevention sleeve 85 is prevented from coming off. A hydraulic jack 92 is provided as an expansion power source for radially expanding the diameter to the state.
When the hydraulic jack 92 is extended in this state, the outer operation shaft 7 moves downward with respect to the inner operation shaft 6, and the elastic member 5 abutting on both pressing surfaces 11 a and 12 a of both pressing members 11 and 12. Are elastically expanded and deformed radially outward. Then, both upper and lower protruding ends of the rust prevention sleeve 85 are bent radially outward with the outer opening edge and the inner opening edge of the through-hole 2 substantially as bending starting points.
As a result, the lower protruding end of the rust-preventive sleeve 85 is formed on the outer peripheral surface of the elastic layer 90 with the elastic layer 90 in close contact with the inner peripheral surface of the through hole of the lining treatment layer 1A in a pressure-contact state. The attached adhesive layer is engaged and attached while being strongly adhered to the inner peripheral surface 2 a of the through hole 2.

[Other embodiments]
(1) In the above-described first embodiment, the first and second mounting members 21 and 22 slidably mounted on the inner operation shaft 6 of the operation shaft B and the third movable piece 20 of each group are formed of rubber. The third movable piece 20 and the first and second mounting members 21 and 22 of each group are pivotally supported by a pivot pin or the like. They may be connected.

(2) In the above-described first embodiment, the first and second mounting members 21 and 22 slidably mounted on the inner operation shaft 6 of the operation shaft B and the third movable piece 20 of each group are swung. The third movable piece 20 is held in a horizontal or substantially horizontal position orthogonal or substantially orthogonal to the axis of the operation shaft B in a no-load state (natural state) by the elastic holding force of the elastic connecting body 23 that is freely connected. However, in a no-load state (natural state), the third movable piece 20 is held in a downward position in which the distal end is positioned downward or in an upward position in which the distal end of the third movable piece 20 is positioned upward. You may comprise.

(3) In the above-described first embodiment, the third movable pieces 20 of each group are rocked by the plurality of mounting members 21 and 22 slidably mounted on the inner operation shaft 6 of the operation shaft B. Although freely mounted, the third movable piece 20 can be changed to a diameter-expanded state in which the third movable piece 20 has a diameter larger than the diameter of the through hole 2 and projects circularly or substantially circularly outward in the radial direction. In this case, the third movable piece 20 may be attached to one attachment member.

(4) In each of the above-described embodiments, the operation shaft B having an inner / outer dual structure has been described as an example of the insertion operation tool that can be inserted into the through hole 2 or the bush 3 of the water pipe 1. The tool may consist of a single operating shaft. Furthermore, you may comprise from members other than a shaft.

(5) In the above-described first embodiment, the main part of the diameter reducing mechanism G2 of the second form changing mechanism G is controlled by the moving force of the first movable piece 41 and the second movable piece 42 toward the diameter reducing side. Although the annular elastic body 47 made of rubber or the like is provided, a compression coil spring extending along the axial direction may be interposed between the second upper holding member 45 and the second lower holding member 46. .
In short, as the diameter reducing mechanism G2, the first movable piece 41 and the second movable piece 42 are relatively moved in the axial direction until the diameter becomes smaller than the hole diameter of the through hole 2 or the inner diameter of the bush 3. Any structure may be used as long as the structure can be used.

(6) In the above embodiment, the pipe wall of the water pipe 1 and the pipe wall composed of the lining treatment layer 1A have been described as examples of the flow path forming wall. Any wall, such as the split T-joint 101, that forms a fluid flow path may be used.
Further, the through hole 2 may have a flow path shape in which the through hole is continuous in the axial direction.

1 channel formation wall part (water pipe)
1A Flow path forming wall (lining treatment layer)
1a Opening edge on outer surface side 1b Opening edge on inner surface 2 Through hole 2a Inner peripheral surface 3 Bush (coated tubular body)
4 receiving part 5 elastic body 11 pressing member (upper pressing member)
12 Pressing member (lower pressing member)
20 Third movable piece (movable piece)
41 1st movable piece (movable piece)
42 Second movable piece (movable piece)
70 Elastic sealing material B Insertion operation tool (operation shaft)
C Coated cylindrical body D Form change mechanism (first form change mechanism)
D1 Nipping mechanism D2 Free swing mechanism E Expansion working part F Interval regulating means G Form change mechanism (second form change mechanism)
G1 Diameter expansion / deformation mechanism G2 Diameter reduction / deformation mechanism H Linkage mechanism K Expansion / contraction means P Movable piece

Claims (10)

The insertion operation tool that can be inserted into the through-hole formed in the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole has a diameter larger than the hole diameter of the through-hole or the inner diameter of the covering cylindrical body. An expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter becomes smaller and an expanded state in which the diameter becomes larger than the hole diameter of the through hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. and the form changing mechanism for changing to the expanded state of projecting includes et al is in,
In the insertion operation tool, the movable piece is disposed at a portion facing the inner peripheral surface of the through hole or the inner peripheral surface of the coating tubular body in a state where the movable piece is locked at an inner opening edge of the through hole. An elastic body that is elastically swellable and deformable outward in the radial direction, and the elastic body is in a contracted state in which the diameter of the through hole is smaller than the inner diameter of the through-hole or the inner diameter of the covering cylindrical body, and is larger than the diameter of the through hole. An expansion operation section having an elastic operation mechanism for changing to a bulged state having a large diameter is provided, and at least a part of the movable piece has the elasticity associated with the change of the elastic operation mechanism to the bulged state. An expansion / contraction operation device provided with a receiving portion for receiving elastic expansion deformation of a body from an axial direction of the insertion operation tool . In the insertion operation tool, the through-hole can be sealed between the movable piece in the expanded state and the inner-side opening edge of the through-hole, and the diameter of the through-hole or the diameter of the coated cylindrical body. A ring-shaped elastic sealing material that can be flexibly deformed to a shape having a smaller diameter than the inner diameter, and a pressing mechanism that presses the elastic sealing material toward the inner opening edge of the through hole via the movable piece in the expanded state. scaling operating device according to claim 1, characterized in that provided. The movable piece has a tapered first movable piece whose circumferential direction width increases toward one end in the axial direction of the insertion operation tool, and a circumferential width increases toward the other end side in the axial direction of the insertion operation tool. And the tapered second movable pieces are arranged alternately in a state in which both sides adjacent to each other in the circumferential direction are slidably contacted in the axial direction. A shape changing mechanism configured to move the first movable piece and the second movable piece relatively close to each other in the axial direction until the diameter of the through hole becomes larger than the diameter of the through hole; With the diameter expansion canceling operation of the diameter expansion changing mechanism, the first movable piece and the second movable piece are brought into the reduced diameter state in which the diameter becomes smaller than the hole diameter of the through hole or the inner diameter of the coating tubular body. It is composed of a diameter change mechanism that moves relatively away in the axial direction. And has claim 1 or 2 scaling operating device according. The insertion operation tool that can be inserted into the through-hole formed in the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole has a diameter larger than the hole diameter of the through-hole or the inner diameter of the covering cylindrical body. An expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter becomes smaller and an expanded state in which the diameter becomes larger than the hole diameter of the through hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. And a form changing mechanism for changing to an expanded state protruding from
The movable piece is configured by arranging a third movable piece that is swingable in the axial direction with respect to the insertion operation tool in a circumferential direction, and the form changing mechanism is configured to remove the third movable piece. A clamping mechanism that clamps and holds the diameter-increased state from both sides in the axial direction, and interlocks with the clamping release operation of the clamping mechanism to move the third movable piece to the outer opening edge of the through hole and the inner surface of the through hole. An expanding / contracting operation device comprising a free swinging mechanism for changing the diameter into a free swinging state in accordance with the contact with the side opening edge . 4. The enlargement / reduction operating device according to claim 3, further comprising a link mechanism for linking the first movable piece and the second movable piece movably within a predetermined range in the axial direction and the radial direction . The insertion operation tool that can be inserted into the through-hole formed in the flow path forming wall portion or the covering cylindrical body that covers the inner peripheral surface of the through-hole has a diameter larger than the hole diameter of the through-hole or the inner diameter of the covering cylindrical body. An expansion / contraction operation device provided with expansion / contraction means that can be changed to a reduced diameter state in which the diameter becomes smaller and an expanded state in which the diameter becomes larger than the hole diameter of the through hole,
The expanding / contracting means includes a plurality of movable pieces arranged in a circumferential direction so as to be movable in a hole diameter direction of the through hole with respect to the insertion operation tool, and the movable piece is provided with a hole diameter of the through hole or the covering. A reduced diameter state that retreats inward in the radial direction until the diameter becomes smaller than the inner diameter of the cylindrical body, and a circular shape or a substantially circular shape on the radially outer side in a shape that is larger than the hole diameter of the through-hole. And a form changing mechanism for changing to an expanded state protruding from
The movable piece is configured by arranging a third movable piece that is swingable in the axial direction with respect to the insertion operation tool in a circumferential direction, and the form changing mechanism is configured to remove the third movable piece. A clamping mechanism for clamping and holding the expanded state from both sides in the axial direction, and interlocking with the clamping release operation of the clamping mechanism, the third movable piece is moved to the outer opening edge of the through hole or the inner surface of the through hole. It comprises a free swinging mechanism that sets a free swinging state that can be changed to the reduced diameter state according to contact with the side opening edge,
The plurality of third movable pieces are divided into a plurality of groups located at predetermined intervals along the circumferential direction, and the third movable pieces of each group are slidably mounted on the operation shaft of the insertion operation tool. When the third movable piece is in the free swing state, the space in the axial direction of the mounting member is set to the third swingable member by the third swingable member. An enlargement / reduction operating device provided with an interval regulating means for regulating an interval at which swinging of the movable pieces does not interfere with each other . The elastic operating mechanism of the extension working unit is provided with a pair of pressing members capable of pressing the elastic body from the axial direction of the insertion operating tool, and the movable piece is provided with the locking state. scaling operating device of the receiving unit according to claim 1, characterized in that provided at a portion that protrudes radially outward from one of the pressing member facing to the movable piece in. The expansion and contraction operation device according to any one of claims 1 to 7 , wherein a part of the movable piece is configured as an expansion processing portion that expands and forms the diameter of the coated cylindrical body in a retaining state . The expansion / contraction operation device according to claim 1 or 7 , wherein the elastic body of the expansion working unit is configured as an elastic sealing material that seals the through hole in the expanded state . The expansion / contraction operation device according to claim 1 or 7 , wherein the elastic body of the expansion working unit is configured to be an expansion elastic body that expands and deforms the coated cylindrical body in a state where it is prevented from being pulled out in the expanded state .

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