JP5918091B2 - Anticorrosion core removal device - Google Patents

Description

  The present invention relates to a detaching device for removing an anticorrosion core attached for anticorrosion treatment of a perforated part formed by perforating a pipe wall of a fluid pipe from the perforated part.

  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 pipe side in an uninterrupted flow state, the anticorrosion core once attached to the perforated portion is invariably flowed. No separation device has been developed for removal in the state. For this reason, for example, when it is necessary to replace a corrosion-resistant core that has deteriorated over time, or when the corrosion-proof core cannot be accurately installed, the corrosion-proof core can be removed from the perforated portion in an uninterrupted state. There wasn't.

  This invention was made paying attention to such a problem, and it aims at providing the anti-corrosion core removal apparatus which can remove a corrosion-proof 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 can reciprocate so that it can reach the position of the anticorrosion core attached to the perforated portion of the fluid pipe from the branching side of the casing that encloses the fluid pipe in a sealed manner, and in the vicinity of the tip of the rod-shaped member A claw portion that passes through the hole of the anticorrosion core at the time of forward movement from the branch portion side and engages with the anticorrosion core at the time of backward movement to the branch portion side,
The claw portion is provided in the vicinity of the tip portion of the rod-shaped member, and at least a part of the claw portion is operable in the direction of the rod-shaped member by operation of an adjusting device provided at an appropriate position of the rod-shaped member. The anticorrosion core engaged with the claw portion is deformed in the inner diameter direction in accordance with the operation of the claw portion.
According to this feature, by using an adjusting device provided at an appropriate position of the rod-shaped member, by operating a part of the claw portion in the direction of the rod-shaped member, the anticorrosion core engaged with the claw portion is formed. It can be deformed in the inner diameter direction. Therefore, the anticorrosion core can be reduced in diameter relative to the perforated portion of the fluid pipe, and even the anticorrosion core that is firmly fixed can perform the removal operation extremely effectively.

The anticorrosion core detaching device of the present invention comprises:
The claw portion extends radially in at least two directions from the position in the vicinity of the tip of the rod-shaped member, and operates in the reduced diameter direction when moving forward from the branch portion side, and passes through the hole portion of the anticorrosion core. The anticorrosion core is configured to operate in the diameter increasing direction after passing through the hole of the anticorrosion core and engage with the anticorrosion core.
According to this feature, since the claw portion extends radially in at least two directions, the anticorrosion core can be reliably deformed with a strong force in the inner diameter direction by relatively operating the claw portion. Further, when passing through the hole portion of the anticorrosion core, the claw portion is made to operate in the reduced diameter direction, and after passing through the hole portion of the anticorrosion core, the claw portion is operated in the diameter increasing direction to prevent corrosion. Since it can be made to engage with a core, a plurality of claw parts can be allowed to pass through the anticorrosion core without being limited to the inner diameter of the hole of the anticorrosion core.

The anticorrosion core detaching device of the present invention comprises:
The said claw part is provided with the latching | locking part which can contact | abut to a part of outer peripheral surface of this anti-corrosion core, after passing the hole part of the said anti-corrosion core.
According to this feature, after the locking portion passes through the hole of the anticorrosion core, the abutment portion comes into contact with the outer peripheral surface of the anticorrosion core. By operating in this direction, the anticorrosion core can be narrowed in the inner diameter direction from the outer peripheral surface to deform a part of the outer peripheral surface of the anticorrosion core.

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 in Example 1. FIG. It is a side view which shows the removal apparatus of a corrosion-proof core. (A) is a sectional side view showing the anticorrosion core detaching device, (b) is a sectional front view, and (c) is a bottom view. It is front sectional drawing which shows the state which reached the front-end | tip part of the removal apparatus to the entrance vicinity position of the hole of a corrosion prevention core. (A) is a side sectional view showing the state where the tip of the detachment device is inserted into the hole of the anticorrosion core, and (b) is a plan sectional view. (A) is a side sectional view showing a state in which the locking protrusion is locked to the peripheral end surface of the anticorrosion core after the claw portion at the tip portion passes through the hole of the anticorrosion core, and (b) is the same FIG. FIG. 6 is a side cross-sectional view showing a state in which the peripheral end surface of the anticorrosion core is plastically deformed with a locking protrusion from the state of FIG. 5, and FIG. It is front sectional drawing which shows the state which pulled out the removal apparatus from the state of FIG. 6, and made the anticorrosion core detach | leave from a punching part. (A) is a front view which shows the front-end | tip part of the removal apparatus of the anticorrosion core in Example 2, (b) is also KK sectional drawing. (A) is a front view which shows the state which inserted the front-end | tip part of the removal apparatus in Example 2 in the hole of the anticorrosion core, (b) is LL sectional drawing similarly. (A) is a front view which shows the state which latched the latching protrusion on the peripheral end surface of the anticorrosion core, after the nail | claw part in the front-end | tip part in Example 2 passed the hole of an anticorrosion core, (b) These are similarly MM sectional drawing. (A) is a sectional side view showing a state in which the peripheral end surface of the anticorrosion core is plastically deformed from the state of FIG. 11 with a locking projection piece, and (b) is an NN sectional view. (A) is a plane sectional view showing the state where the diameter of the claw part of the detaching device in Example 3 was expanded, and (b) is also a side sectional view. (A) is a plane sectional view showing the state where the diameter of the claw part of the detaching device in Example 3 was reduced, and (b) is also a side sectional view. (A)-(c) is a partial expanded sectional view which shows the various modifications in the shape of the latching protrusion of a nail | claw part. It is front sectional drawing which shows the modification of the removal operation | work of the anticorrosion core by the removal apparatus in Example 1. FIG.

  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. 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 metal 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.

  The fluid pipe 2 is narrowed by a casing 3 as a casing of the present invention composed of a first divided member 3a and a second divided member 3b. More specifically, the fluid pipe 2 is provided on the inner peripheral surface of the first divided member 3a. A part of the outer peripheral surface of the fluid pipe 2 is hermetically sealed by the sealing member. Note that the housing 3 of the present embodiment may have a divided structure including a plurality of divided case bodies of three or more, or does not have a divided structure, and is a mold, welding process or machining process. 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 on-off valve device 16 capable of opening and closing the branch portion 3c is attached to the branch portion 3c. A branch pipe or the like (not shown) is connected to the tip of the device 16 via a connection pipe 15. 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 branch pipe side via the perforation part 2a. Yes. 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 is formed of a plastic body, and is plastically deformed by a predetermined attachment device (not shown) so that the distal end side of the anticorrosion core 5, that is, the peripheral end surface 5 a inserted into the perforated portion 2 a is directed toward the outer peripheral side. Is installed. The anticorrosion core is not limited to one formed from a plastic body, and for example, an anticorrosion core formed from an elastic body may be attached by being pressed against the perforated portion and elastically deformed.

  The anticorrosion core detaching device 1 shown in FIGS. 2 and 3 is continuously used when the above-described anticorrosion core 5 cannot maintain the anticorrosion function of the perforated portion 2a due to deterioration over time, or when it is periodically replaced. It is an apparatus for removing the anticorrosion core 5 from the perforated part 2a in the flow state.

  As shown in FIG. 2, the anticorrosion core detaching device 1 (hereinafter referred to as the detaching device 1) includes members that engage with the anticorrosion core 5, and a tip portion 9 provided at the tip of the detaching device 1; It is mainly composed of a rod-like member 8 extending rearward from the tip end portion 9 and a handle shaft 10 at the rear end of the rod-like member 8 for operating the detaching device 1 as a whole.

  As shown in FIGS. 3A and 3B, the bar-shaped member 8 has a through-hole 8a penetrating in the axial direction inside, and the rotation shaft 6 is axially formed with respect to the through-hole 8a. It is rotatable and is inserted in a sealed manner. As shown in FIG. 3B, the distal end portion of the rotating shaft 6 protrudes toward the distal end side from the rod-shaped member 8, and a gear 6a described later is fixed to the outer peripheral surface. As will be described later, the rotation shaft 6 appropriately rotates an operation portion 6b which is an adjusting device of the present invention protruding from the rear end portion of the rotation shaft 6 to the outside of the handle shaft 10. The operation unit 6b may be operated using a dedicated or general-purpose tool that matches the shape of the operation unit 6b, or may be operated by directly grasping the operator.

  Further, as shown in FIGS. 3B and 3C, the gear 6a of the rotating shaft 6 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 the flange portion 8b projecting from the tip end of the rod-like member 8 in the outer diameter direction. The attaching portions 7 and 7 have a substantially U-shaped cross-sectional view that opens toward the gear 6a, and can accommodate the meshing members 13 and 13 therein, respectively.

  As shown in FIG. 3C, the engaging members 13 and 13 have claw portions 14 and 14 extending in a direction substantially orthogonal to the axial direction of the rotating shaft 6. That is, by operating the operation portion 6b to rotate the rotation shaft 6 appropriately, the meshing members 13 and 13 are operated in the radial direction of the rotation shaft 6 via the gear 6a and the meshing portion 13a. Accordingly, the claw portions 14 and 14 are moved closer to or away from each other. Note that the number of claw portions is not necessarily limited to two, and for example, one or three or more claw portions may be provided.

  Further, as shown in FIG. 2 and FIG. 3A, the claw portions 14, 14 are engagement portions according to the present invention that can come into contact with the peripheral end surface 5 a of the anticorrosion core 5 as will be described in detail later. The locking protrusions 14a, 14a further extend in the orthogonal direction or substantially orthogonal direction from the end portions of the claw portions 14, 14 in the extending direction, and the peripheral end surface of the anticorrosion core 5 The surface in contact with 5a is tapered. In addition, it is preferable that these nail | claw parts 14 and 14 become difficult to deform | transform, for example, you may make it difficult to deform | transform by forming a nail | claw part by a certain amount of thickness, and it is hard with comparatively rigid. You may make it difficult to deform | transform by forming with a material.

  Next, how the anticorrosion core 5 is removed in the uninterrupted state using the separation device 1 will be described with reference to FIGS. 4 to 8. First, the on-off valve 16a of the on-off valve device 16 is closed, and the connecting pipe 15 and the fluid pipe network are separated, and a short pipe 21 is attached instead, as shown in FIG. The disconnecting device 1 is connected. More specifically, after the short tube 21 is attached to the on-off valve device 16, the rod-like member 8 is inserted into the insertion hole 12a of the lid member 12 in a sealing manner, and the lid member 12 to which the release device 1 is attached is connected in a sealing manner. To do.

  Next, the operator opens the on-off valve device 16 and pushes the handle shaft 10 to send the detaching device 1 in the direction of the fluid pipe 2, and the anticorrosion core having the tip 9 attached to the perforated portion 2a. 5 to the vicinity of the entrance of the hole 5A.

  Subsequently, as shown in FIG. 5A, the handle shaft 10 is pushed in to further feed the distal end portion 9 into the hole portion 5 </ b> A of the anticorrosion core 5. At this time, as shown in FIGS. 5A and 5B, in the first embodiment, the operation portion 6b is rotated in a state where the rod-like member 8 is fixed so as not to rotate, and the claw portion 14 is operated. , 14 are brought close to each other, and in this state, the handle shaft 10 is pushed in to feed the distal end portion 9 toward the fluid pipe 2, and the distal end portion 9 is inserted into the hole 5 </ b> A of the anticorrosion core 5. By operating in this way, the diameter of the claw portions 14 and 14 can be made smaller than the inner peripheral surface of the anticorrosion core 5, so that the tip end portion 9 can be inserted into the hole 5 </ b> A of the anticorrosion core 5. .

  Next, as shown in FIG. 6A, the distal end portion 9 is further fed, and the claw portions 14 and 14 are completely passed through the hole portion 5A. Thereafter, as shown in FIGS. 6 (a) and 6 (b), the operation portion 6b is rotated so that the claw portions 14 and 14 are separated from each other, and the locking protrusions 14a and 14a are connected to the anticorrosion core. 5 is brought into contact with the peripheral end surface 5a.

  Then, as shown in FIG. 7, in a state where the locking protrusions 14 a and 14 a are in contact with the peripheral end surface 5 a of the anticorrosion core 5, the operation portion 6 b is operated to rotate the claws 14 and 14 again. Move closer. Thereby, the anticorrosion core 5 is narrowed in the inner diameter direction, and the peripheral end surface 5a of the anticorrosion core 5 is plastically deformed so as to have a smaller diameter than the perforated portion 2a of the fluid pipe 2. Thereafter, as shown in FIG. 8, the handle shaft 10 is pulled out, and the anticorrosion core 5 is detached from the perforated portion 2a. After that, although not particularly shown, the anticorrosion core 5 detached from the perforated portion 2a is allowed to pass through the on-off valve device 16 together with the tip portion 9, and when it passes, the on-off valve 16a is closed again, and the short pipe 21, The removal work of the anticorrosion core 5 is completed by removing the lid member 12.

  As described above, by operating the operating portion 6b provided on the rod-shaped member 8 to operate the claw portions 14 and 14 in a direction close to each other, the engagement with the peripheral end surface 5a of the anticorrosion core 5 is established. Narrow pressure can be applied by the stop protrusions 14a and 14a, and the anticorrosion core 5 is plastically deformed in the inner diameter direction. Therefore, the anticorrosion core 5 can be reduced in diameter relative to the perforated portion 2 a of the fluid pipe 2, and even the anticorrosion core 5 that is firmly fixed can be removed extremely effectively.

  Moreover, when inserting the front-end | tip part 9 in the hole 5A of the anti-corrosion core 5, while the nail | claw parts 14 and 14 operate | move smoothly in the state diameter-reduced rather than the hole 5A of the anti-corrosion core 5, an anti-corrosion core After passing through the five hole portions 5A, the claw portions 14 and 14 can be operated in the diameter increasing direction to be engaged with the anticorrosion core.

  Moreover, the position of the nail | claw parts 14 and 14 is adjusted according to the shape of the anticorrosion core 5 which should be removed by making the nail | claw parts 14 and 14 adjoin, ie, the diameter reduction of the diameter of the nail | claw parts 14 and 14 or adjustment of diameter expansion. Since it can change suitably, it can respond to the anticorrosion core 5 of various shapes.

  Note that the locking protrusions in the present embodiment can have a wide variety of shapes, for example, the shapes shown in the locking protrusions 141a, 142a, and 143a in FIGS. 15A to 15C. . For example, as shown in FIG. 15A, the locking projection piece 141 a of the claw portion 141 forms a surface 141 d that abuts on the peripheral end surface 5 a of the anticorrosion core 5 so as to be perpendicular to the outer peripheral surface 5 b of the anticorrosion core 5. The contact area with the vertical surface may be increased.

  Further, as shown in FIG. 15 (b), the locking projection piece 142 a of the claw portion 142 is provided with a hook 142 d that protrudes toward the peripheral end surface 5 a of the anticorrosion core 5 at the end portion thereof. When the contact area with the peripheral end surface 5a is reduced and the above-described anticorrosion core 5 is partially deformed in the inner diameter direction, the pressing force may be concentrated on the corresponding contact.

  Further, as shown in FIG. 15 (c), the locking protrusion 143 a of the claw portion 143 is locked by providing a plurality of concave and convex friction portions 143 d on the surface contacting the peripheral end surface 5 a of the anticorrosion core 5. The frictional force between the projecting piece 143a and the peripheral end surface 5a of the anticorrosion core 5 may be improved.

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

  First, 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 FIG. 9 (b), the detaching device 11 is provided with a distal end portion 90 having members that engage with the anticorrosion core 5, a rod-shaped member 80 extending from the distal end portion 90, and a rear end of the rod-shaped member 80. The handle shaft 100 is mainly composed of a handle shaft 100 for operating the disengagement device 11, and an adjusting device 150 described later is provided at the center of the handle shaft 100.

  As shown in FIG. 9, the tip of the rod-shaped member 80 is a flange portion 80 b that projects in the outer diameter direction, and an attachment portion 70 that extends to the tip end side of the rod-shaped member 80 on the outer peripheral surface of the flange portion 80 b. 70 are attached oppositely. As shown in FIG. 9A, the attachment portion 70 is formed with gaps 70a, and claw portions 140 and 140 are disposed in the gaps 70a and 70a via sliding members 40 and 40, which will be described later. It has become so.

  In the rod-shaped member 80, the moving shaft 60 is disposed in the rod-shaped member 80 so as to be movable forward and backward with respect to the penetrating portion 80 a penetrating in the axial direction, and the distal end side of the moving shaft 60 is more than the rod-shaped member 80. Projects to the tip side. A first taper member 51 and a second taper member 52 that slide the sliding members 40, 40 in the direction close to or away from each other on the moving shaft 60 projecting from the rod-shaped member 80 toward the tip side are provided. The moving shaft 60 is spaced apart in the axial direction. The first taper member 51 includes taper surfaces 51a and 51a inclined at an angle corresponding to the taper surfaces 40a and 40a of the slide members 40 and 40, and the second taper member 52 includes the slide members 40 and 40. Taper surfaces 52a and 52a which are inclined at an angle corresponding to the taper surfaces 40b and 40b.

  Further, the moving shaft 60 can be adjusted in its forward / backward movement by the adjusting device 150 described above. Specifically, the adjustment device 150 includes an adjustment screw 152 that is inserted into the through portion 80a from the handle shaft 100 side, and an operation portion 151 that is provided at the rear end of the adjustment screw 152 and protrudes outside the handle shaft 100. The adjustment screw 152 is screwed into a screw hole 60 a screwed to the rear end of the moving shaft 60. Further, the moving shaft 60 is inserted into the penetrating portion 80a in a sealed manner by an O-ring, and is engaged with a key groove (not shown) formed in the penetrating portion 80a in the axial direction.

  That is, by rotating the operation portion 151 and appropriately rotating the adjustment screw 152, the movement shaft 60 is restricted from moving in the circumferential direction with respect to the rod-shaped member 80 along the key groove of the penetrating portion 80a. In this state, it moves forward and backward in the axial direction. When the moving shaft 60 moves backward, the sliding members 40, 40 are slid along the tapered surfaces 51a, 51a of the first taper member 51 so that the positions of the claws 140, 140 are relatively close to each other. The position moves to. Further, when the moving shaft 60 moves forward, the sliding members 40, 40 are slid along the tapered surfaces 52a, 52a, so that the positions of the claws 140, 140 are moved away from each other. ing.

  Next, how the anticorrosion core 5 is removed in the uninterrupted state using the separation device 11 will be described with reference to FIGS. 10 and 12. First, although not described in the drawings, the on-off valve 16a of the on-off valve device 16 is closed as in the above embodiment, the connection pipe 15 and the fluid pipe network are separated, the short pipe 21 is attached, and then the lid The detachment device 11 is connected via the member 12.

  Next, as shown in FIG. 10, the operator rotates the operation unit 151 described above to move the moving shaft 60 backward in the axial direction, thereby moving the tapered surfaces 51 a and 51 a of the first taper member 51. Pressing against the tapered surfaces 40a, 40a of the sliding members 40, 40 to bring the claw portions 140, 140 close to each other, and in this state, the handle shaft 100 is pushed in to feed the distal end portion 90 toward the fluid pipe 2, The leading end 90 is inserted into the hole 5 </ b> A of the anticorrosion core 5. By operating in this way, the diameter of the claw portions 140, 140 can be made smaller than the inner peripheral surface of the anticorrosion core 5, so that the tip 90 can be easily inserted into the hole 5A of the anticorrosion core 5.

  Next, as shown in FIG. 11, the tip portion 90 is further fed so that the claw portions 140 and 140 are completely passed through the hole portion 5 </ b> A of the anticorrosion core 5. Thereafter, by rotating the operating portion 151 to move the moving shaft 60 in the axial direction, the tapered surfaces 52a, 52a of the second tapered member 52 are pushed against the tapered surfaces 40b, 40b of the sliding members 40, 40. The claw portions 140 and 140 are separated from each other, and the locking protrusions 140a and 140a are brought into contact with the peripheral end surface 5a of the anticorrosion core 5, respectively.

  Then, as shown in FIG. 12, in a state where the engaging protrusions 140a and 140a are engaged with the peripheral end surface 5a of the anticorrosion core 5, the operating portion 151 is rotated to retreat the moving shaft 60 in the axial direction again. By moving, the anticorrosion core 5 is narrowed and plastically deformed in the inner diameter direction, the handle shaft 100 is pulled out, and the anticorrosion core 5 is detached from the perforated portion 2a.

  Next, the anticorrosion core detaching apparatus according to Example 3 will be described with reference to FIGS. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  The main body of the anticorrosion core removal apparatus 111 according to the third embodiment will be described with reference to FIG. As shown in FIGS. 13 (a) and 13 (b), the tip of the rod-shaped member 80 ′ is a flange portion 80b ′ that is substantially circular in plan view and projects in the outer diameter direction. The long holes 18 and 18 extending in a spiral shape from the vicinity of the periphery of the flange portion 80b ′ toward the center and penetrating in the axial direction are provided at diagonal positions sandwiching the rod-shaped member 80 ′. In addition, connecting members 28, 28 made of screws, washers, bearings, or the like are inserted into the long holes 18, 18, respectively, and the connecting members 28, 28 are inserted through a flange 80b '. The claw portions 240, 240 are connected.

  Further, the rod-shaped member 80 ′ is rotatable on a rotation shaft 160 disposed in a penetrating portion 80a ′ penetrating in the axial direction inside the rod-shaped member 80 ′, and is externally fitted in a sealing manner. The distal end side of the rotation shaft 160 is provided with a projecting portion 160a that protrudes toward the distal end side from the rod-shaped member 80 ′ and has a substantially circular shape in plan view that projects in a direction substantially orthogonal to the rotation shaft 160. The overhanging portion 160a has guide portions 160c and 160c extending coaxially with the claw portions 240 and 240 so as to protrude from the flange portion 80b 'side. The claw portion 240 and the claw portion 240c are provided between the guide portion 160c and the guide portion 160c. 240 is arranged.

  Next, how the claw portions 240 and 240 are reduced in diameter and how the diameter is increased will be described. As shown in FIG. 13, in a state where the diameters of the claw portions 240 and 240 are expanded, the connection members 28 and 28 are positioned in the vicinity of the periphery of the flange portion 80 b ′ in the long holes 18 and 18, respectively.

  Next, although not shown, the operator fixes the operation unit 160b in a non-rotatable state using a dedicated or general-purpose tool adapted to the shape of the operation unit 160b. In this state, the handle shaft 100 ′ is fixed to the rod-shaped member 80. As shown in FIG. 14, the flange portion 80 b ′ is rotated, and the connection members 28, 28 are moved near the center of the flange portion 80 b ′ in the long holes 18, 18. To be guided in the radial direction. At this time, the claw portions 240, 240 connected to the connection members 28, 28 are disposed on the guide portions 160c, 160c fixed so as not to be rotatable, and therefore can be rotated around the axis of the rod-shaped member 80 ′. Instead, the guide portions 160c and 160c guide the claw portions 240 and 240 toward each other, and the diameter is reduced.

  Although not shown, the detaching device 111 configured in this way is inserted into the hole 5A of the anticorrosion core 5 with the diameters of the claw portions 240 and 240 reduced, similarly to the above embodiment, and the hole of the anticorrosion core 5 is inserted. After completely passing through 5A, the diameter of the claw portions 240, 240 is expanded, and the locking protrusions 240a, 240a are brought into contact with the peripheral end surface 5a of the anticorrosion core 5, respectively, and then the claw portion is again formed. The diameters of 240 and 240 are reduced, the anticorrosion core 5 is narrowed and plastically deformed in the inner diameter direction, the handle shaft 100 'is pulled out, and the anticorrosion core 5 is detached from the perforated portion 2a.

  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 embodiment described above, the locking protrusions 14a and 14a of the claw portions 14 and 14 are brought into contact with the anticorrosion core 5 attached by plastically deforming the peripheral end surface 5a of the anticorrosion core 5 to the inside of the perforated portion 2a. In the above description, the claw portions 14 and 14 are narrowed by bringing them close to each other and the anticorrosion core 5 is plastically deformed. However, the peripheral end surface of the anticorrosion core is not plastically deformed, and is inserted and attached to the perforated portion as it is. In this case, as long as an engagement portion that engages with the peripheral end surface of the anticorrosion core is provided, the locking protrusions need not be provided.

  Further, for example, when performing the removal work of the anticorrosion core by the removal device, as shown in FIG. 16, the introduction opening 3d is provided on the side surface of the branch portion 3c, and the camera portion 30a and the operation shaft 30b are formed from the introduction opening 3d. The separation operation by the separation device 1 may be performed while the periphery of the anticorrosion core 5 is confirmed by inserting the image acquisition device 30 in a sealed manner, that is, by the image acquisition device 30 inserted from a direction orthogonal to the separation device 1. In FIG. 16, the detachment device 1 of the first embodiment is used, but the detachment device is not limited to this.

  Further, for example, in this embodiment, the claw portions 14, 14 provided in the opposite direction to the tip portion 9 are brought close to each other so that the anticorrosion core 5 is plastically deformed from both sides and removed from the perforated portion 2a. Although described, it may be configured to have only one claw portion at the tip portion. In this case, after a predetermined portion in the circumferential direction of the anticorrosion core 5 is plastically deformed by the claw portion, the handle shaft is rotated. Then, the position of the claw portion may be changed, and the anticorrosion core 5 may be easily removed from the perforated portion 2a by plastically deforming a location different from the location, for example, a location facing the location.

  Moreover, the aspect which deform | transforms the outer periphery of the anticorrosion core 5 by a nail | claw part is not restricted to an Example, As long as a part in a nail | claw part can operate | move to the direction of a rod-shaped member, what kind of aspect may be sufficient, for example, a nail | claw You may design so that a part of part may protrude toward the rod-shaped member side.

  Moreover, although the present Example demonstrated the shape of several kinds of nail | claw parts and a latching protrusion piece, the shape of a latching protrusion piece is restricted to the shape contact | abutted to the outer peripheral surface 5b of the anticorrosion core 5 as mentioned above. For example, it may be formed in the shape of a needle that pierces the peripheral end surface 5a of the anticorrosion core 5, or may be a shape that is sandwiched from the inner peripheral surface and the outer peripheral surface of the anticorrosive core 5 that face each other.

DESCRIPTION OF SYMBOLS 1 Separation device 2 Fluid pipe 2a Perforation part 3 Housing | casing 3c Branch part 5 Corrosion-proof core 5a Perimeter end surface (outer peripheral surface)
5A hole 6 rotating shaft 6b operation part (adjustment device)
8 Rod-shaped member 9 Tip portion 10 Handle shaft 11 Detachment device 14, 14 Claw portion 14a, 14a Locking protrusion (locking portion)
16 Opening / closing valve device 18, 18 long hole 30 image acquisition device 40, 40 sliding member 51 first taper member 52 second taper member 60 moving shaft 80, 80 ′ rod-shaped member 90 tip portion 100, 100 ′ handle shaft 111 detaching device 140,140 Claw part 140a, 140a Locking protrusion (locking part)
141a Locking protrusion (locking part)
142a Locking protrusion (locking part)
143a Locking protrusion (locking part)
150 Adjustment Device 160 Rotating Shaft 160b Operation Unit (Adjustment Device)
240, 240 claw portions 240a, 240a locking protrusions (locking portions)

Claims (3)

A rod-shaped member that can reciprocate so that it can reach the position of the anticorrosion core attached to the perforated portion of the fluid pipe from the branching side of the casing that encloses the fluid pipe in a sealed manner, and in the vicinity of the tip of the rod-shaped member A claw portion that passes through the hole of the anticorrosion core at the time of forward movement from the branch portion side and engages with the anticorrosion core at the time of backward movement to the branch portion side,
The claw portion is provided in the vicinity of the tip portion of the rod-shaped member, and at least a part of the claw portion is operable in the direction of the rod-shaped member by operation of an adjusting device provided at an appropriate position of the rod-shaped member. The anticorrosion core detaching apparatus is characterized in that the anticorrosion core engaged with the claw portion is deformed in the inner diameter direction in accordance with the operation of the claw portion.   The claw portion extends radially in at least two directions from the position in the vicinity of the tip of the rod-shaped member, and operates in the reduced diameter direction when moving forward from the branch portion side, and passes through the hole portion of the anticorrosion core. The anticorrosion core detaching device according to claim 1, wherein the anticorrosion core detachment device is configured to operate in a diameter increasing direction after passing through the hole portion of the anticorrosion core and engage with the anticorrosion core.   The anticorrosion core according to claim 1, wherein the claw portion includes a locking portion capable of contacting a part of the outer peripheral surface of the anticorrosion core after passing through the hole of the anticorrosion core. Detachment device.

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