JP2014118994A - Removal device for anticorrosive core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removal device for an anticorrosive core which allows easy removal of the anticorrosive core from a boring part in a non-cutoff flow condition.SOLUTION: A removal device for an anticorrosive core includes a rod member 8 extended from a branch part 3c of a housing 3 hermetically enclosing a fluid pipe 2 and capable of hermetically advancing and retracting at least in an inside of the branch part 3c, and a diameter enlargement member 9 (pressing member) provided on an end side of the rod member 8. The diameter enlargement member 9 (pressing member) has an acting part 14 abutted to an inner peripheral part of the anticorrosive core 5 at least a part of which is attached to a boring part 2a of the fluid pipe 2, and the acting part 14 is inserted into a hole part of the anticorrosive core 5 by operation from the outer part of the housing 3, and the anticorrosive core 5 is pressed from the inner side so as to be held.

Description

  The present invention relates to an anticorrosion core detaching device for removing an anticorrosion core attached for perforation prevention of a perforated part formed by perforating a pipe wall of a fluid pipe from the perforated part in a continuous flow state.

  Conventionally, when a perforated part is formed by perforating a pipe wall in a metal fluid pipe, the perforated part of the metal part is exposed, which may corrode and cause tap water contamination. Therefore, in order to prevent corrosion of the perforated portion, it is necessary to appropriately attach an anticorrosion core to the perforated portion in a continuous flow state. Therefore, an anticorrosion core is externally fitted to the core mounting tool body, and the anticorrosion core is inserted into the perforated portion by moving the core mounting tool forward from the branch pipe side, and in the axial direction of the core mounting tool body. The anticorrosion core is expanded from the inner peripheral surface in the outer diameter direction by the first, second, and third inclined portions that are provided and gradually expand in diameter, and the seal member on the outer periphery of the anticorrosion core is pressed against the inner wall of the hole to be in close contact therewith Core mounting tools have been developed. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 8-14481 (page 3, FIG. 3)

  However, as shown in Patent Document 1, although there is a conventional tool for attaching the anticorrosion core to the perforated portion from the branch portion side in the uninterrupted flow state, the anticorrosion core once attached to the perforated portion is continuously inflowed. No release device has been developed for removal in the state. Therefore, when it is necessary to replace a corrosion-resistant core that has deteriorated over time, or when it is not possible to accurately attach the corrosion-proof core, the corrosion-proof core is firmly attached so as not to be detached from the perforated portion. Could not be removed.

  This invention was made paying attention to such a problem, and it aims at providing the removal apparatus of the anticorrosion core which can remove the anticorrosion core easily from a piercing | piercing part in a continuous flow state.

In order to solve the above problems, the anticorrosion core detaching device of the present invention comprises:
A rod-shaped member that extends from the branch portion side of the housing that sealably surrounds the fluid pipe, and that can move in a sealed manner at least within the branch portion, and a pressing member provided on the tip side of the rod-shaped member,
The pressing member has an action part at least a part of which is in contact with the inner peripheral part of the anticorrosion core attached to the perforated part of the fluid pipe, and the action part is operated by an operation from the outside of the casing. The anticorrosion core is inserted into a hole and is configured to press and hold the anticorrosion core from the inside.
According to this feature, after the rod-shaped member is moved forward in a sealed state from the branching portion side and the action portion of the pressing member is inserted into the hole portion of the anticorrosion core, the anticorrosion core is pressed and held from the inside, and the holding state By operating the bar member from the outside of the housing and moving the pressing member, the anticorrosion core can be moved and operated with the movement of the bar member, so that the anticorrosion core can be easily removed from the perforated portion in an uninterrupted state. .

The anticorrosion core detaching device of the present invention comprises:
The action portion is configured to press and hold the rear end side of the anticorrosion core from the inside.
According to this feature, the rod-shaped member is moved forward in a sealed state from the branching portion side, the action portion of the pressing member is inserted into the hole portion of the anticorrosion core, and then the rear end side of the anticorrosion core is pressed from the inside to prevent corrosion. A stress in the diameter increasing direction is applied to the rear end side of the core, and by the reaction, a stress in the diameter reducing direction is applied to the tip end side of the anticorrosion core at the other end, and the tip end side of the anticorrosion core can be reduced in diameter. Therefore, the anticorrosion core can be easily removed from the perforated portion in a continuous flow state.

The anticorrosion core detaching device of the present invention comprises:
The pressing member includes a large-diameter portion that is larger in diameter than the hole portion on the rear end side, and a tapered portion that is inclined in the inner diameter direction of the hole portion at the tip end.
According to this feature, just by inserting the anticorrosion core detaching device from the branching portion side toward the perforating portion, the taper portion comes into contact with the inner peripheral edge on the rear end side of the hole portion of the anticorrosion core, and the pressing member is inserted into the hole of the anticorrosion core. Since it guides in a part, a press member can be positioned very easily in the appropriate position of a corrosion prevention core, and the rear end side of a corrosion prevention core can be pressed from the inside by making a large diameter part reach in a hole.

The anticorrosion core detaching device of the present invention comprises:
The rod-shaped member has a drive portion extending along the rod-shaped member, and the action portion is movable in a radial direction of the perforated portion by driving of the drive portion.
According to this feature, the operating portion is adjusted to the appropriate position of the anticorrosion core by inserting the operating portion into the hole portion of the anticorrosion core while operating the driving portion in the inner diameter direction of the perforation portion. In addition, by operating the drive part after adjusting the position of the action part, the action part can be moved in the outer diameter direction of the perforation part and the rear end side of the anticorrosion core can be pressed from the inside.

The anticorrosion core detaching device of the present invention comprises:
The pressing member includes a high friction portion having a high friction coefficient in at least a part of the outer peripheral portion of the action portion.
According to this feature, since the action portion includes the high friction portion, the friction force with the anticorrosion core increases when the pressing member presses the anticorrosion core from the inside. When collecting, the anticorrosion core can be prevented from dropping from the pressing member.

It is front sectional drawing which shows the state by which the anticorrosion core was attached to the perforation part of the fluid pipe | tube. It is a front view which shows the removal apparatus of the anticorrosion core in Example 1. FIG. It is front sectional drawing which shows the state which made the diameter-expansion member of the removal apparatus in Example 1 reach | attain to the entrance vicinity position of the hole of a corrosion prevention core. It is a principal part enlarged view which shows the state by which the diameter-expansion member of the removal apparatus was guided by the taper part. It is front sectional drawing which shows the state from which the anticorrosion core was removed from the punching part. It is front sectional drawing which shows the state which collect | recovered the anticorrosion cores removed from the punching part. It is front sectional drawing which shows an example which removes an anticorrosion core from a perforation part. (A) is front sectional drawing which shows the removal apparatus of the anticorrosion core in Example 2, (b) is side sectional drawing similarly, (c) is a bottom view similarly. It is front sectional drawing which shows the state which made the diameter-expansion member of the removal apparatus in Example 2 reach | attain to the entrance vicinity position of the hole of a corrosion prevention core. It is front sectional drawing which shows the state from which the anticorrosion core was removed from the punching part in Example 2. FIG. FIG. 10 is a front sectional view showing a modification of the diameter-expanding member in the second embodiment.

  EMBODIMENT OF THE INVENTION The form for implementing the removal apparatus of the anticorrosion core which concerns on this invention is demonstrated below based on an Example.

  The anticorrosion core detaching apparatus according to the first embodiment will be described with reference to FIGS. Hereinafter, the front side in FIG. 1 will be described as the front side (front side) of the fluid pipe.

  As shown in FIG. 1, the fluid pipe 2 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, and is formed in a substantially circular shape in cross section, and the inner peripheral surface is powder-coated or Covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. Further, in this embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, for example, industrial water, agricultural water, sewage, etc., gas, gas and liquid The gas-liquid mixture may be used.

  As shown in FIG. 1, the fluid pipe 2 is externally fitted in a sealed manner by a housing 3 including a first divided member 3 a and a second divided member 3 b. In addition, the housing | casing 3 of a present Example may be the division | segmentation structure which consists of a several division | segmentation member divided into 3 or more bodies, or does not have a division | segmentation structure, but is a casting mold, welding, or machining Etc., it may be formed continuously. Furthermore, the material of the housing 3 is made of a metal material such as cast iron. However, various materials can be used as in the case of the fluid pipe described above as long as the material is applied according to the material of the fluid pipe. May be.

  The first divided member 3a is provided with a branch portion 3c extending in a direction substantially perpendicular to the fluid pipe 2, and an open / close valve device 16 capable of opening and closing the branch portion 3c is attached to the branch portion 3c. A fluid pipe network (not shown) is connected to the tip of the device 16 via a joint 6 and a connecting pipe 20. In addition, a perforation part 2a perforated by a perforation device (not shown) is formed on the pipe wall of the fluid pipe 2, and the fluid in the fluid pipe 2 branches to the fluid pipe network side via the perforation part 2a. ing. In addition, an anticorrosion core 5 is attached to the perforated part 2a in order to prevent the inner peripheral surface from which the metal part is exposed.

  The anticorrosion core 5 has a slightly larger diameter than the perforated portion 2a, is formed of an elastic body having elasticity, and is attached in pressure contact with the perforated portion 2a by its elastic force. Further, a flange 5a that is partially locked to the top of the fluid pipe 2 is provided on the edge of the anticorrosion core 5 on the rear end side (branch part 3c side) in the circumferential direction. The anticorrosion core 5 does not fall into the tube 2. The anticorrosion core is not limited to one formed from an elastic body. For example, the anticorrosion core formed from a plastic body may be attached to the perforated portion by plastic deformation using a predetermined attachment device. Furthermore, the collar part of the anticorrosion core is not necessarily limited to the one provided as long as it has relatively high strength.

  The anticorrosion core detaching device 1 shown in FIG. 2 (hereinafter referred to as the detaching device 1) is replaced when the anticorrosion core 5 described above cannot maintain the anticorrosion function of the perforated portion 2a due to deterioration over time or the like. In some cases, the anticorrosion core 5 is a device for removing the anticorrosion core 5 from the perforated portion 2a in the uninterrupted flow state.

  As shown in FIG. 2, the anticorrosion core detaching device 1 is provided at the distal end of the detaching device 1, and has a diameter-enlarging member 9 having members engaged with the anticorrosion core 5, and extends rearward from the diameter-enlarging member 9. It is mainly comprised from the rod-shaped member 8 and the handle shaft 10 which operates at the rear end of the rod-shaped member 8 and operates the detaching device 1. In addition, the diameter-expansion member 9 in a present Example is a press member of this invention.

  The diameter-expanding member 9 includes a base member 17 having a substantially circular shape in a plan view formed slightly larger in diameter than the hole 5A (see FIG. 4) of the anticorrosion core 5 and a predetermined interval 4 along the periphery of the base member 17. And two pressing bodies 18 arranged. In addition, the base member 17 has a rod-like member 8 with a distal end fixed to a substantially central portion by a detachable screw 25 (see FIG. 3). Therefore, the diameter-expanding member 9 can be replaced with a composite having a different shape depending on the application. In addition, the press body 18 may be provided with two or three with respect to the base member, or a plurality of five or more.

  The pressing body 18 includes a fixing portion 15 that is fixed to the opposite surface of the base member 17 to the rod-like member 8 side with a bolt or the like, and a plate that is an action portion of the present invention that extends from the fixing portion 15 to the distal end side. And a spring portion 14 to form a substantially L shape. The tip of the leaf spring portion 14 is formed with a tapered portion 14a that is inclined toward the inner diameter direction, and the rear end side of the leaf spring portion 14 is formed with substantially the same diameter as the base member 17. That is, the diameter-expanding member 9 forms the large-diameter portion in the present invention in which the base member 17 and the leaf spring portion 14 located on the rear end side of the diameter-expanding member 9 are slightly larger in diameter than the hole 5A. .

  Further, a high friction portion 14 b having a large number of irregularities is formed on the outer peripheral surface of the leaf spring portion 14, and the high friction portion 14 b has a relatively high friction coefficient in the leaf spring portion 14. . The high friction portion 14b is not limited to a large number of concave and convex shapes. For example, a high friction portion may be formed by sticking a high-viscosity sheet to the engagement portion, or the high friction portion may be formed of a synthetic resin or the like. It does not matter as long as it has a relatively high friction coefficient.

  Moreover, it is preferable that the press body 18 is formed with a thin metal, synthetic resin, etc., and is given a certain amount of elastic force. Furthermore, the pressing body 18 is not limited to the one connected to the base member with a bolt or the like, and may be fixed to the base member by welding or the like, or the engaging member and the auxiliary member may be It may be integrally formed with the base member by casting or the like.

  Next, how the anticorrosion core 5 is removed in the uninterrupted state using the separation device 1 will be described with reference to FIGS. 3 to 6. First, the on-off valve device 16 is closed, and the connecting pipe 20 and the fluid pipe network are separated from the joint 6, and instead, as shown in FIG. 3, the short pipe 21 and the rubber joint 4 are attached in order, and then the lid member The disconnecting device 1 is connected via 12. More specifically, after the short tube 21 and the rubber joint 4 are attached to the on-off valve device 16, the rod member 8 is inserted into the insertion hole 12a of the lid member 12 in a sealed state, and the lid member 12 to which the detachment device 1 is attached. The detachment device 1 is connected to the on-off valve device 16 in a sealing manner by being fixed to the flange portion 4 a of the rubber joint 4.

  In addition, since the rubber joint 4 has a structure in which the flange portions 4a and 4b are connected via the rubber member 4c, the rubber member 4c is attached to the flange portion 4b fixed to the flange portion of the short pipe 21. The flange portion 4a can be freely displaced in the twisting direction, the swinging direction, and the like within a range in which elastic deformation is possible. The rubber joint 4 does not necessarily have to be used, and various types of joints using, for example, bamboo springs or the like may be used as long as the rod-like member 8 can be moved freely back and forth and left and right. Furthermore, the rod-shaped member 8 may be movable to some extent in the radial direction within the elastic deformation range of the seal ring made of an elastic body provided in the gap between the rod-shaped member 8 and the insertion hole 12a without using a joint.

  Next, the operator opens the on-off valve device 16 as shown in FIG. 3 and pushes the handle shaft 10 to feed the detaching device 1 in a sealed state in the direction of the fluid pipe 2 substantially horizontally. The member 9 is made to reach a position in the vicinity of the flange portion 5a of the anticorrosion core 5 attached to the perforated portion 2a.

  Subsequently, as shown in FIG. 4, the handle shaft 10 is pushed in to further feed the diameter-expanding member 9. At this time, since each taper portion 14a located on the most distal side comes into contact with the inner peripheral edge of the hole portion 5A, the diameter expanding member 9 is guided while being slid along the taper portion 14a in the inner diameter direction of the anticorrosion core 5. As described above, since the pressing body 18 is given a certain amount of elastic force, the leaf spring portion 14 is guided to an appropriate position very smoothly by the elastic force. Moreover, since the diameter-expanding member 9 can be inserted and moved from the branching portion 3 c toward the hole 5 </ b> A of the anticorrosion core 5, it is easy to position with respect to the anticorrosion core 5.

  As shown in FIG. 5, the leaf spring portion 14 after being guided to an appropriate position presses the vicinity of the flange portion 5 a of the anticorrosion core 5 from the inside to the outside diameter direction by its elastic restoring force. As a result, stress in the diameter increasing direction is applied to the flange portion 5a side of the anticorrosion core 5, and due to the reaction, stress in the diameter reducing direction is applied to the tip side of the anticorrosion core 5 which is the other end. More specifically, the anticorrosion core is a point where the inner peripheral surface of the perforated portion 2a and the outer peripheral surface of the anticorrosion core 5 come into contact with each other when the flange portion 5a side of the anticorrosion core 5 is expanded from the inside to the outer diameter direction. 5 is reduced in diameter to a smaller diameter than the perforated portion 2a, and the anticorrosion core 5 is removed from the perforated portion 2a. Further, at this time, each leaf spring portion 14 presses and grips the anticorrosion core 5 from the inside in the outer diameter direction, and each high friction portion 14b is on the inner peripheral surface of the anticorrosion core 5 in the vicinity of the flange portion 5a. Since the contact is made, the frictional force to the anticorrosion core 5 is improved, so that the anticorrosion core 5 does not fall from the diameter expanding member 9.

  Next, as shown in FIG. 6, when the anticorrosion core 5 is removed from the perforated portion 2 a, when the handle shaft 10 is pulled and the diameter-enlarging member 9 is pulled out, the anticorrosion core 5 is expanded. And withdrawn from the housing 3 in a continuous flow state. Thereafter, the anticorrosion core 5 detached from the perforated portion 2a is allowed to pass through the opening / closing valve device 16 together with the diameter-expanding member 9, and when it passes, the opening / closing valve device 16 is closed again, and the short tube 21, rubber joint 4, lid The removal operation of the anticorrosion core 5 is completed by removing the member 12.

  When the tip side of the anticorrosion core 5 is reduced in diameter, if a part of the tip side of the anticorrosion core 5 is engaged with the perforated portion 2a, as shown in FIG. By swinging the handle shaft 10 back and forth and right and left with the fulcrum as a fulcrum, the anticorrosion core 5 may be moved to disengage the engagement portion with the perforated portion 2a. Except in such a case, the rod-shaped member 8 does not have to be operated separately with the rubber joint 4 as a fulcrum.

  As described above, after the rod-like member 8 is moved forward from the branching portion 3c in a sealed state and the leaf spring portion 14 of the diameter-expanding member 9 is inserted into the hole 5A of the anticorrosion core 5, the anticorrosion core 5 is inserted from the inside. By pressing and holding, and operating the rod-shaped member 8 from the outside of the housing 3 and moving the diameter-expanding member 9 in the held state, the anticorrosion core 5 can be moved and operated along with the movement of the rod-shaped member 8. The core 5 can be easily removed from the perforated part 2a in a continuous flow state.

  Further, after the rod-shaped member 8 is moved in a sealed state from the branching portion 3 c side and the leaf spring portion 14 of the diameter-expanding member 9 is inserted into the hole portion 5 A of the anticorrosion core 5, By pressing the vicinity of the portion 5a from the inside, stress in the diameter increasing direction is applied to the flange portion 5a side of the anticorrosion core 5, and due to the reaction, stress in the diameter reducing direction is applied to the tip side of the anticorrosion core 5 which is the other end. Thus, since the diameter of the tip side of the anticorrosion core 5 can be reduced, the anticorrosion core 5 can be easily detached from the perforated portion 2a in an uninterrupted state.

  Moreover, the taper part 14a contact | abuts to the inner peripheral edge by the side of the collar part 5a in the hole 5A of the anticorrosion core 5 only by inserting the detachment | desorption apparatus 1 from the branch part 3c direction to the perforation part 2a, and the diameter expansion member 9 is made into the anticorrosion core. Therefore, the diameter-expanding member 9 can be positioned very easily at an appropriate position of the anticorrosion core 5. Moreover, the flange part 5a side of the anticorrosion core 5 can be pressed from the inside by making the leaf | plate spring part 14 larger diameter than the hole part 5A reach | attain in the hole part 5A.

  Further, since the leaf spring portion 14 includes the high friction portion 14b, the frictional force with the anticorrosion core 5 is increased in a state where the diameter expansion member 9 is pressed against the anticorrosion core 5 from the inside. It is possible to prevent the anticorrosion core 5 from dropping from the diameter-expanding member 9 when collecting outside the body 3.

  In addition, when inserting the diameter-expanding member 9 into the hole 5 </ b> A of the anticorrosion core 5, only the leaf spring portion 14 is inserted. However, the present invention is not limited to this, and the diameter-expanding member 9 is extended to the base member 17. You may make it insert in a hole.

  Furthermore, the diameter-expanding member of the present invention is not limited to the above-described embodiment. For example, the diameter-expanding member may be configured to be press-fitted into a hole portion of the anticorrosion core so as to close the hole portion. It does not matter as long as it can be pressed.

  Next, the anticorrosion core detaching apparatus according to the second embodiment will be described with reference to FIGS. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted.

  The main body of the anticorrosion core detaching device 11 according to the second embodiment will be described with reference to FIG. As shown in FIGS. 8 (a) and 8 (b), the rod-shaped member 80 has a through-hole 80a penetrating in the axial direction in the inside thereof. A moving shaft 60 is inserted in a sealed manner so as to be rotatable around the axis. Further, as shown in FIG. 8A, the distal end of the rotation shaft 60 protrudes toward the distal end side from the rod-shaped member 80, and a gear 60a described later is fixed to the outer peripheral surface. As will be described later, the rotation shaft 60 is driven by appropriately rotating an operation portion 60b protruding from the rear end portion of the rotation shaft 60 to the outside of the handle shaft 100. The operation unit may be operated using a dedicated or general-purpose tool adapted to the shape of the operation unit 60b, or may be operated by directly grasping the operator. Alternatively, the operation unit may not be provided and the rotation shaft may be driven by electric control. Furthermore, the rotation shaft 60 is not limited to the embodiment of the present embodiment, and may be provided as long as it is provided along an appropriate position of the rod-shaped member.

  Further, as shown in FIGS. 8A and 8C, the gear 60a of the rotating shaft 60 is engaged with a pair of engagement members 13 and 13 via engagement portions 13a and 13a. The members 13 and 13 are supported by attachment portions 7 and 7 attached to an overhanging portion 80b projecting from the tip of the rod-like member 80 in the outer diameter direction. The attaching portions 7 and 7 have a substantially U-shaped cross-sectional view that opens toward the gear 60a, and can accommodate the meshing members 13 and 13 therein, respectively.

  Further, as shown in FIG. 8C, the engaging members 13, 13 have action portions 22, 22 extending in a direction substantially orthogonal to the axial direction of the rotation shaft 60. That is, when the operating portion 60b is rotated and the rotating shaft 60 is appropriately rotated, the meshing members 13 and 13 are operated in the radial direction of the rotating shaft 60 via the gear 60a and the meshing portion 13a. Accordingly, the action portions 22 and 22 are moved closer to or away from each other. As described above, the diameter-expanding member 90 of the present embodiment includes the meshing members 13 and 13, the attachment portions 7 and 7, and the action portions 22 and 22. Further, a high friction portion 22a is formed at the distal end of the action portions 22 and 22 in the direction of separation. In addition, the action part is not necessarily provided in two, and may be provided in a plurality of, for example, three or more.

  Next, how the anticorrosion core 5 is removed in the uninterrupted state using the separation device 11 will be described with reference to FIGS. 9 and 10. First, the on-off valve device 16 is closed, the joint 6 is attached, and then the detachment device 11 is connected via the lid member 121. In addition, the lid member 121 is provided with an introduction port 121b through which the image acquisition device 30 including the camera unit 30a and the operation shaft 30b can be introduced in a sealed manner at a position avoiding the insertion hole 121a. Thereby, when inserting the detachment | desorption apparatus 11, it can align the diameter-expansion member 90, confirming the periphery of the anticorrosion core 5 with the image acquisition apparatus 30. FIG.

  Next, as shown in FIG. 9, the operator opens the opening / closing valve device 16, pushes the handle shaft 100 described above, and sends the detachment device 11 in the direction of the fluid pipe 2. It reaches the position near the anticorrosion core 5 attached to the perforated part 2a. At this time, the image acquisition device 30 is introduced in a sealed manner into the branch portion 3c via the inlet 121b provided in the branch portion 3c, so that the operator can grasp the position of the diameter expanding member 90. Yes.

  Next, as shown in FIG. 9, the operation portion 60b is rotated while the rod-shaped member 80 is fixed so as not to rotate, and the handle shaft 100 is pushed in with the action portions 22 and 22 being brought close to each other. Then, the diameter expanding member 90 is fed in the direction of the fluid pipe 2, and the diameter expanding member 90 is inserted into the hole 5 </ b> A of the anticorrosion core 5. Then, the diameter-adjusted member 90 is adjusted to an appropriate position with respect to the anticorrosion core 5. After that, as shown in FIG. 10, the action portions 22, 22 are separated from each other, and the action portions 22, 22 press the vicinity of the flange portion 5 a of the anticorrosion core 5 from the inner side to the outer diameter direction. The tip side is reduced in diameter, and the anticorrosion core 5 is removed from the perforated part 2a.

  Thus, after adjusting the diameter-expanding member 90 inserted into the hole 5A of the anticorrosion core 5 with the action portions 22 and 22 close to each other, the action portions 22 and 22 are separated from each other to prevent the corrosion prevention core. 5 can be pressed from the inside. In other words, when the operator rotates the operation part 60b as appropriate and the action parts 22 and 22 are close to each other, the diameter of the diameter-expanding member 90 is reduced. Not only can the diameter-expanding member 90 be easily inserted into the hole 5 </ b> A, but the action portions 22 and 22 can be adjusted to an appropriate position with respect to the anticorrosion core 5. Furthermore, when the action parts 22 and 22 are separated from each other, the diameter of the diameter-expanding member 90 is increased, so that the rear end side of the anticorrosion core 5 can be pressed from the inside.

  Next, a modified example of the diameter expanding member and the drive unit will be described with reference to FIG. Note that the same components as those shown in the embodiment are given the same reference numerals and redundant description is omitted. explain.

  The drive unit in this modification is an advance / retreat shaft 61 that can reciprocate in the axial direction in the through-hole 80 a of the rod-shaped member 80. Further, the diameter-expanding member 91 in this modification is connected to the base member 170 having a communication hole 170a communicating with the penetrating portion 80a of the rod-shaped member 80 at the center, and the tip of the advancing / retracting shaft 61, and the reciprocating movement of the advancing / retracting shaft 61 The movable portion 40 that moves along with the movable portion 40, and the action portion 221 positioned between the base member 170 and the movable portion 40.

  On the outer peripheral surface of the base member 170, an annular projecting portion 170b projecting toward the distal end side is provided. The movable portion 40 includes an insertion portion 40a that is inserted into the communication hole 170a, and a distal end portion 40b that is provided at the distal end of the insertion portion 40a and has a larger diameter than the insertion portion 40a. A recess 40c that opens toward the advance / retreat shaft 61 is formed in 40b. Moreover, the action part 221 is comprised from the elastic member which has elasticity, and one edge part is accommodated in the protrusion part 170b of the base member 170, and the other edge part is accommodated in the recessed part 40c. .

  The diameter-expanding member 91 configured as described above is inserted into the hole 5A of the anticorrosion core 5 and the position of the action part 221 is adjusted to an appropriate position with respect to the anticorrosion core 5, and then the advancing / retracting shaft 61 is moved backward. . Along with this, the movable portion 40 moves in the backward direction, and the action portion 221 is narrowed by the base member 170 and the movable portion 40. As described above, since the action part 221 is composed of an elastic member having elasticity, the action part 221 is elastically deformed by being narrowed by the base member 170 and the movable part 40, and a part of the action part 221 is protruded 170b. And the tip 40b project in an annular shape in the outer diameter direction. That is, since the diameter of the diameter expanding member 91 is increased, the rear end side of the anticorrosion core 5 can be pressed from the inside. Furthermore, since the action part 221 contacts the inner peripheral surface of the anticorrosion core 5 in the circumferential direction and the action part 221 is made of an elastic member, the frictional force to the anticorrosion core 5 is greatly improved, and the anticorrosion core When collecting 5, the anticorrosion core 5 can be reliably prevented from falling from the diameter-expanding member 91.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, when the operator grasps the handle shaft 10 and pushes or pulls it in, the detaching device 1 moves forward and backward toward the anticorrosion core 5. The separating device may be moved forward and backward toward the anticorrosion core using a driving means such as a cylinder.

  Moreover, in the said Example, the collar part 5a is provided in the edge of the rear end side in the anticorrosion core 5, so that the leaf | plate spring part 14 (action part) may press the vicinity of the collar part 5a from the inner side. However, it is not limited to this, for example, the action part presses and supports the inner peripheral surface ahead of the rear end side of the anticorrosion core, and pulls up the rod-shaped member while supporting the anticorrosion core. You may make it remove from a perforation part forcibly, and an action part is not necessarily restricted to what presses the rear-end side of a corrosion-proof core.

  Further, the detaching device is not necessarily limited to a device used for detaching the anticorrosion core that prevents the perforated portion, and may be used for detaching the reinforcing core that reinforces the structural strength around the perforated portion, for example.

DESCRIPTION OF SYMBOLS 1 Separation device 2 Fluid pipe 2a Perforation part 3 Housing | casing 3c Branch part 4 Rubber joint 5 Corrosion-proof core 5A Hole part 5a Eave part 8 Bar-shaped member 9 Expanding member (pressing member)
11 Detachment device 14 Leaf spring part (action part, large diameter part)
14a Taper part 14b High friction part 17 Base member (large diameter part)
22 action part 22a high friction part 60 rotation axis (drive part)
61 Advancing and retracting axis (drive unit)
80a Penetration part 80 Bar-shaped member 90 Expanding member (pressing member)
91 Expanding member (pressing member)
221 action part

Claims (5)

A rod-shaped member that extends from the branch portion side of the housing that sealably surrounds the fluid pipe, and that can move in a sealed manner at least within the branch portion, and a pressing member provided on the tip side of the rod-shaped member,
The pressing member has an action part at least a part of which is in contact with the inner peripheral part of the anticorrosion core attached to the perforated part of the fluid pipe, and the action part is operated by an operation from the outside of the casing. An anticorrosion core detaching device, wherein the anticorrosion core is inserted into a hole of the anticorrosion core and configured to press and hold the anticorrosion core from the inside.   The said action part is comprised so that the rear-end side of the said anticorrosion core may be pressed and hold | maintained from inner side, The removal apparatus of the anticorrosion core of Claim 1 characterized by the above-mentioned.   The said pressing member is provided with the large diameter part which is larger diameter than the said hole part in the rear-end side, and is equipped with the taper part which inclines in the internal diameter direction of the said hole part at the front-end | tip. The anticorrosion core detaching device according to 2.   2. The pressing member includes a driving portion extending along the rod-shaped member, and the action portion is movable in a radial direction of the perforating portion by driving the driving portion. Or the anticorrosion core detachment apparatus according to 2.   The anti-corrosion core detaching device according to any one of claims 1 to 4, wherein the pressing member includes a high friction portion having a high friction coefficient in at least a part of an outer peripheral portion of the action portion.

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