JP2019194485A - Bush mounting machine - Google Patents

Abstract

To provide a bush mounting machine that can remove chips accumulated at the bottom part of a fluid pipe while mounting a bush to a branch port.SOLUTION: A bush mounting machine Z for mounting a bush 6 having an elastic coating layer 12 that contacts an inner peripheral surface of a branch port formed through a fluid pipe, comprises an inner shaft member 31 having a protruding part 44b, an outer shaft member 32, a moving mechanism K, an elastic body 45, a bush 6, and a chip removal mechanism R for removing chips existing at the bottom part of the fluid pipe. The chip removal mechanism R has a magnet part 50 movable to the fluid pipe side with respect to the protruding part 44b, a support shaft 51 inserted into a hollow part 31A and supporting the magnet part 50, and an operation unit 46 for moving the support shaft 51 forward and backward along an axis Y direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bush mounting machine for mounting a bush having an elastic coating layer that contacts an inner peripheral surface of a branch port formed through a fluid pipe.

  2. Description of the Related Art Conventionally, a bush mounting machine for mounting a bush having an elastic coating layer is known in order to prevent corrosion of a perforation port (branch port) perforated using a perforator in a fluid pipe (see, for example, Patent Document 1). .

  The bush mounting machine described in Patent Literature 1 includes a pressing portion provided at the tip of the inner feed shaft and a receiving portion provided at the tip of the outer feed shaft among the inner and outer double feed shafts that are relatively movable in the axial direction. A diameter-enlarging elastic body is provided therebetween, and a bush having an elastic coating layer that contacts the inner peripheral surface of the perforation port is externally mounted on the diameter-enlarging elastic body. This bushing machine expands and deforms the bush by expanding the elastic body for diameter expansion outward in the radial direction as the presser part and the receiving part move relative to each other in a state where the bush is inserted into the perforation port. In this way, it is attached to the inner peripheral surface of the branch port in a retaining state.

JP 2005-326025 A

  By the way, metal chips generated when a perforation opening is formed using a perforator are deposited on the bottom of the fluid pipe. Although this swarf can be discharged to some extent from the inside of the drilling machine by the fluid pressure, a lot of swarf deposited at the bottom of the fluid pipe still remains. For this reason, in order to remove the remaining chips, it is necessary to provide a separate chip removing device, which is inefficient.

  Therefore, there is a demand for a bush mounting machine capable of removing chips accumulated on the bottom of the fluid pipe at the same time that the bush is mounted on the branch port.

  The characteristic configuration of the bush mounting machine according to the present invention is a bush mounting machine that mounts a bush having an elastic coating layer that comes into contact with the inner peripheral surface of a branch port formed through the fluid pipe, and penetrates in the axial direction. An inner shaft member having a hollow portion and a projecting portion projecting radially outward from an end on the fluid pipe side; an outer shaft member in which the inner shaft member is inserted; and the inner shaft member and the outer shaft A movement mechanism that moves the member forward and backward along the axial direction, and a fluid pipe-side end of the outer shaft member and the protrusion, and the outer shaft is operated by the movement mechanism. An elastic body that expands by moving the member and the inner shaft member relatively close to each other, a bush mounted on the outside of the elastic body, and chip removal that removes chip existing on the bottom of the fluid pipe And the chip removal mechanism moves closer to the fluid pipe than the protruding portion. Noh magnet unit, and a support shaft which is inserted into the hollow portion for supporting the magnet portion is the support shaft that has a an operation portion for advancing and retracting movement along the axis direction.

  In this configuration, the elastic body sandwiched between the end portion of the outer shaft member on the fluid pipe side and the protruding portion of the inner shaft member is subjected to a diameter expansion operation to push and spread the bush attached to the outside of the elastic body. The elastic coating layer of the bush is brought into close contact with the inner peripheral surface of the branch port. Thereby, anticorrosion processing can be performed on the branch port.

  Further, the bush mounting machine of this configuration includes a magnet part that is movable on the fluid pipe side from the projecting part, a support shaft that is inserted into the hollow part of the inner shaft member and supports the magnet part, and the support shaft in the axial direction. And a chip removal mechanism having an operation unit that moves forward and backward along. That is, a support shaft that supports the magnet portion is inserted using the hollow portion of the inner shaft member, and the magnet portion is supported by the support shaft. For this reason, by moving the support shaft to the bottom side of the fluid pipe along the axial direction by the operation part, the chips can be adsorbed to the magnet part in contact with the bottom of the fluid pipe.

  After the chips are adsorbed on the magnet part, the chips can be recovered from the bottom of the fluid pipe by removing the bush mounting machine including the chip removal mechanism with the bush left in the branch port. There is no need to provide a separate chip removing device. Thus, the bush mounting machine which can remove the chips deposited on the bottom of the fluid pipe at the same time as mounting the bush at the branch port can be provided.

  Another characteristic configuration is that a guide portion capable of accommodating the magnet portion while guiding the movement of the magnet portion is formed at an end portion of the protruding portion on the fluid pipe side.

  If a guide part for guiding the movement of the magnet part is provided as in this configuration, the magnet part can be smoothly moved by the guide part when the support shaft is moved to the bottom side of the fluid pipe. Moreover, since this guide part is comprised so that a magnet part can be accommodated, it becomes possible to remove a bush mounting machine in the state which accommodated the magnet part which adsorb | sucked the chip in the guide part. As a result, there is no inconvenience that, for example, the magnet portion comes into contact with the bush left at the branch port and chips fall. Therefore, it is possible to reliably collect chips.

  Another feature is that the support shaft is made of a flexible wire.

  If the support shaft is made of a flexible wire wire as in this configuration, the magnet section can be swung, and the chips that have accumulated widely on the bottom of the fluid pipe can be efficiently removed. Can do.

  Another characteristic configuration is that the support shaft is formed of a tube member having no flexibility.

  If the support shaft is made of a tube member that does not have flexibility as in this configuration, it can be moved in the vertical direction while maintaining the magnet surface of the magnet portion in a fixed posture. Therefore, the magnet portion can be reliably brought into contact with the vertically projected portion of the branch port where the chips are likely to accumulate in the bottom of the fluid pipe, and the chips accumulated on the bottom of the fluid pipe are efficiently removed. be able to.

  In another characteristic configuration, the magnet portion includes a base portion fixed to an end portion of the support shaft, an extension portion extending radially outward from the base portion, and a bottom side of the fluid pipe among the extension portions. A magnet fixed to the surface of the base, and the extension part is in a point that a connection part with the base part is a hinge.

  The magnet part in this structure has the extension part connected by the hinge with respect to the base, and has fixed the magnet to the surface of the bottom part side of the fluid pipe | tube in this extension part. As a result, when the magnet portion is moved to the bottom of the fluid pipe by the support shaft, the surface area of the magnet that directly contacts the chips can be increased by expanding the diameter of the extension portion by pushing the support shaft. . As a result, the chips accumulated widely on the bottom of the fluid pipe can be efficiently adsorbed by the magnet.

It is a longitudinal cross-sectional view which shows the state which perforated the fluid pipe | tube with the punching machine. It is a longitudinal cross-sectional view of a bush mounting machine. It is a partially expanded sectional view which shows the state which inserted the bush in the branch port. It is a partially expanded sectional view which shows the state which expanded the diameter of the elastic body. It is a partially expanded sectional view which shows the state which moved the support shaft forward. It is a partially expanded sectional view which shows the state which retracted the magnet part which adsorb | sucked the chip. It is a partially expanded sectional view which shows the state which moved the outer shaft member backward. It is a perspective view which shows the chip removal mechanism which concerns on 1st embodiment. It is a perspective view which shows the chip removal mechanism which concerns on 2nd embodiment. It is a perspective view which shows the chip removal mechanism which concerns on 3rd embodiment. It is a perspective view which shows the chip removal mechanism which concerns on 4th embodiment.

  Hereinafter, embodiments of a bush mounting machine according to the present invention will be described with reference to the drawings. In this embodiment, a perforation port 5 (an example of a branch port) is formed by a perforator C in a cast iron water pipe 1 (an example of a fluid pipe) having a lining layer 15 on the inner peripheral surface. A bush mounting machine Z for mounting 6 will be described as an example. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the invention. Hereinafter, the side (gravity direction) of the water pipe 1 in FIG. 1 may be described as down or front, and the side opposite to the water pipe 1 (direction opposite to the gravity direction) may be described as up or rear.

  FIG. 1 shows a drilling machine C. When installing the drilling machine C, the water pipe 1 includes a cast iron split case body 7 attached along the outer peripheral surface of the water pipe 1 and a cast iron valve case 10 fastened to the split case body 7. And are fixed.

  The split case body 7 is attached to the water pipe 1 from the outside in the pipe radial direction, and is divided into a plurality of parts in the pipe circumferential direction (in this embodiment, three splits), the first split case 7A, the second split case 7B, and It has a third divided case 7C. When the connecting flanges 7a, 7b, 7c integrally formed at both ends in the pipe circumferential direction of the divided cases 7A, 7B, 7C are fastened by a plurality of bolts 8 and nuts 9, the first divided case 7A, the second divided case Case 7B and third divided case 7C are fixed to water pipe 1. A seal material made of synthetic rubber (for example, styrene butadiene rubber) that seals between the outer peripheral surface of the water pipe 1 in the seal holding groove 7d formed on the inner peripheral surface of each divided case 7A, 7B, 7C. 3 is installed. In addition, you may comprise the division | segmentation case body 7 by 2 division | segmentation or 4 division | segmentation or more.

  The first split case 7A is integrally formed with a branch pipe portion 2 along the branch axis Y direction (an example of the axis direction) perpendicular to the pipe axis X of the water pipe 1. At the end, a connection flange 2a is formed in which the first connection flange 10a of the valve case 10 is fastened by a plurality of bolts 8 and nuts 9.

  In the valve case 10, a valve body 16 serving as a work on-off valve is accommodated so as to be able to advance and retract along a direction perpendicular to the branch axis Y. At one end of the valve case 10, a first connection flange 10 a is formed in which the connection flange 2 a of the branch pipe portion 2 is fastened by a plurality of bolts 8 and nuts 9. Further, a second connection flange 10 b is formed at the other end of the valve case 10 to which the connection flange 20 a of the casing 20 of the punching machine C is fastened by a plurality of bolts 8 and nuts 9.

  The perforator C is supported by the casing 20, is supported by the casing 20, is rotated by a driving force such as an electric motor, and is movable in the branch axis Y direction. And a cutter 4 composed of a hole saw or the like connected to the.

  A connecting flange 20 a to which the second connecting flange 10 b of the valve case 10 is fastened by a plurality of bolts 8 and nuts 9 is integrally formed at the end of the casing 20. The cutter 4 includes a cylindrical body 4A having a cutting tip at a tip portion, a center drill 4B fixed to the center position of the bottom wall portion of the cylindrical body 4A, and protruding downward from the cutting tip of the cylindrical body 4A. have.

  The punching machine C feeds the drive rotary shaft 21 along the branch axis Y direction through the flow path in the valve case 10 and the flow path in the branch pipe portion 2, and then uses the driving force of an electric motor or the like to cut the cutter. 4 is rotated to cut and form a perforation port 5 penetrating in the direction of the branch axis Y in the pipe wall of the water pipe 1. The section 1A generated along with the cutting of the perforation port 5 is moved back (retracted) to the initial position while being held in the cutter 4, and after closing the valve body 16, the perforator C is removed from the valve case 10. Remove. At this time, as shown in FIG. 1, metal chips D generated when the perforation port 5 is formed using the perforator C are deposited on the bottom of the water pipe 1 on the bottom wall of the water pipe 1. Yes.

[Basic configuration of bushing machine]
Then, the bush mounting machine Z which concerns on this embodiment is demonstrated using FIGS.

  The bush mounting machine Z includes a metal base A, an outer shaft member 32 made of a metal tubular member, an inner shaft member 31 made of a metal tubular member, an outer shaft member 32, and A moving mechanism K that moves the inner shaft member 31 back and forth along the branch axis Y direction, and an elasticity that expands the diameter by relatively moving the outer shaft member 32 and the inner shaft member 31 by operating the moving mechanism K. A body 45, a cylindrical bush 6 attached to the outside of the elastic body 45, and a chip removal mechanism R that removes the chip D present at the bottom of the water pipe 1 are provided.

  The base portion A includes a cylindrical mounting tube portion 30 fastened and fixed to the valve case 10 described above, and a first bearing member 33 disposed between the mounting tube portion 30 and the outer shaft member 32. is doing.

  A first connection flange 30 a is formed at one end of the mounting cylinder 30 to which the second connection flange 10 b of the valve case 10 from which the drilling machine C is removed is fastened by a plurality of bolts 8 and nuts 9. . A second connection flange 30b is formed at the other end of the mounting cylinder 30. The second connection flange 30b has an annular recess 30c that engages with the annular protrusion 33b of the first bearing member 33 formed on the inner peripheral surface. When the lid member 30d is fastened to the second connecting flange 30b with the bolt 23, the annular protrusion 33b and the annular recess 30c are engaged, and the mounting cylinder portion 30 and the first bearing member 33 are connected. .

  The first bearing member 33 includes a boss portion 33a that supports the outer shaft member 32 in the branch axis Y direction, and a support receiving portion 33c that extends radially outward from the boss portion 33a. The boss portion 33a is formed with an annular protrusion 33b that protrudes radially outward in the radial direction, and the annular protrusion 33b engages with the annular recess 30c described above, whereby the first bearing member 33 is attached to the mounting cylinder portion. The valve case 10 and the split case body 7 are supported via 30. One end of a connecting shaft 34 and a feed screw shaft 36, which will be described later, are fixed to the support receiving portion 33c.

  An inner shaft member 31 is inserted into the outer shaft member 32. The outer shaft member 32 includes an interlocking member 40 fixedly connected to the upper flange 32a with a bolt 39, and a cylindrical metal receiving portion 43 fixed to the lower end (the end of the outer shaft member 32 on the water pipe 1 side). Example). A screw piece 41 screwed into the male screw portion 36a of the feed screw shaft 36 is attached to the interlocking member 40 in a state where relative rotation is impossible. Further, of the interlocking member 40, a diameter increasing operation nut 35 described later is attached to a boss portion 40a formed with a through hole of the inner shaft member 31 via a ball bearing BG so as to be relatively rotatable.

  On the outer peripheral surface of the receiving portion 43, an abutting portion 43 a that abuts on the base end side portion of the cylindrical bush 6 from the branch axis Y direction is formed. In addition, the receiving portion 43 is formed with a bottom surface 43b on which an upper end surface 44c of a pressing portion 44 described later can abut.

  The inner shaft member 31 is disposed on the inner side of the outer shaft member 32 and is configured to be relatively movable along the branch axis Y direction with respect to the outer shaft member 32 by the rotation operation of the diameter expansion operation nut 35. . The inner shaft member 31 has a hollow portion 31A penetrating in the branch axis Y direction (axial direction), and a metal pressing portion 44 screwed to the lower end portion. The pressing portion 44 includes a cylindrical shaft portion 44a and a protruding portion 44b that protrudes radially outward from the lower end portion (end portion on the water pipe 1 side) of the cylindrical shaft portion 44a. When the upper end surface 44c of the cylindrical shaft portion 44a contacts the bottom surface 43b of the receiving portion 43, the upward movement of the inner shaft member 31 is restricted.

  An upper screw portion 31a is formed at the upper end portion of the inner shaft member 31, and the inner periphery of the diameter increasing operation nut 35 is screwed into the upper screw portion 31a. A discharge pipe 31B communicating with the hollow portion 31A is connected to the upper end portion of the inner shaft member 31. By this discharge pipe 31B, the chips D deposited on the bottom of the water pipe 1 can be discharged to the outside by fluid pressure. Note that a suction device may be connected to the discharge pipe 31B to suck the chips D together with water.

  The moving mechanism K includes a first moving mechanism K1 that moves the outer shaft member 32 and the inner shaft member 31 forward and backward along the branch axis Y, and the inner shaft member 31 in the direction of the branch axis Y with respect to the outer shaft member 32. And a second moving mechanism K2 that relatively moves along the second moving mechanism K2.

  The first moving mechanism K <b> 1 rotates the screw piece 41 provided on the interlocking member 40 of the outer shaft member 32, the feed screw shaft 36 including the male screw portion 36 a screwed with the screw piece 41, and the feed screw shaft 36. And a rotating handle 42. One end of the feed screw shaft 36 is supported by the first bearing member 33, and an intermediate portion is supported by a second bearing member 37 described later. When the rotary handle 42 is rotated, the feed screw shaft 36 screwed into the screw piece 41 is rotated, and the interlocking member 40 integrated with the screw piece 41 moves straight along the branch axis Y direction. At this time, the outer shaft member 32 to which the interlocking member 40 is fixed and the inner shaft member 31 that is screwed and fixed to the diameter-enlarging operation nut 35 attached to the boss portion 40a of the interlocking member 40 are branched shafts. Moves straight along the Y direction.

  The second moving mechanism K2 includes a diameter increasing operation nut 35, a disk-shaped second bearing member 37 in which a through hole 37a into which the diameter increasing operation nut 35 is inserted, and a support receiving portion 33c of the first bearing member 33. And a connecting shaft 34 screwed and fixed at a plurality of locations.

  The diameter expansion operation nut 35 is attached to the boss portion 40a of the interlocking member 40 fixed to the outer shaft member 32 through a ball bearing BG so as to be relatively rotatable. When the diameter expansion operation nut 35 is rotated using an operation tool (not shown), the outer shaft member 32 does not rotate and only the diameter expansion operation nut 35 rotates. As a result, only the inner shaft member 31 screwed into the diameter expansion operation nut 35 moves straight along the branch axis Y direction. That is, the inner shaft member 31 can be moved relative to the outer shaft member 32 along the branch axis Y direction by operating the diameter expansion operation nut 35.

  A through hole 37 b that rotatably supports the feed screw shaft 36 is formed in the central portion of the second bearing member 37. A connecting shaft 34 is fastened and fixed to the outer peripheral side surrounding the through holes 37 a and 37 b of the second bearing member 37 by a nut 38. The second bearing member 37 is a support receiving portion of the first bearing member 33. It is supported by a connecting shaft 34 screwed and fixed to 33c.

  The elastic body 45 is formed of a cylindrical synthetic rubber that is bulged and deformed radially outward by the close movement of the inner shaft member 31 and the outer shaft member 32. The elastic body 45 is sandwiched between the protruding portion 44b of the pressing portion 44 of the inner shaft member 31 and the receiving portion 43 of the outer shaft member 32 (the end of the outer shaft member 32 on the water pipe 1 side), As the pressing portion 44 is lifted with respect to the receiving portion 43, the pressing portion 44 is bulged and deformed radially outward.

  The bush 6 includes a metal insertion tube 6A made of cylindrical stainless steel having excellent corrosion resistance and rust resistance, and a synthetic rubber (for example, EPDM) lined on the outer peripheral surface of the insertion tube 6A. And an elastic covering layer 12 (see FIG. 3). The bush 6 is mounted on the outer side of the elastic body 45 so that the inner peripheral surface of the insertion cylinder portion 6 </ b> A contacts the outer peripheral surface of the elastic body 45.

  Of the elastic coating layer 12 covering the outer peripheral surface of the bush 6, the branch port inner peripheral surface side portion 12A is made thinner than the thickness of the branch port outer peripheral surface side portion 12B and has a small diameter. Accordingly, even when the branch axis Y of the perforation port 5 and the bush insertion axis of the bush mounting machine Z are slightly displaced, the bush 6 can be reliably and smoothly inserted with little or no catch. it can.

  In the insertion cylinder portion 6A, an insertion length that abuts a part of the peripheral edge of the opening of the perforation port 5 from the branch axis Y direction at a position slightly deviated from the center position of the branch axis Y to the proximal end side. An annular locking portion 6Aa for restriction is formed to bulge outward in the radial direction. In other words, the insertion restricting portion 13 that abuts the opening periphery of the perforation port 5 is composed of the annular locking portion 6Aa of the bush 6 and the rear covering portion 12C of the elastic coating layer 12 that covers the outer peripheral surface of the annular locking portion 6Aa. ing. Further, the contact surface 12 d of the rear covering portion 12 C that contacts the opening periphery of the perforation port 5 is formed on a vertical surface orthogonal to the branch axis Y.

  As shown in FIG. 2 and FIG. 8, the chip removal mechanism R includes a magnet portion 50 that can move to the water pipe 1 side relative to the protruding portion 44 b of the pressing portion 44 of the inner shaft member 31, and the hollow of the inner shaft member 31. A support shaft 51 that is inserted into the portion 31A so as to be movable back and forth along the branch axis Y, and a linear motion handle 46 (an example of an operation unit) that reciprocates the support shaft 51 along the branch axis Y. ) And. Moreover, the chip removal mechanism R in this embodiment has the guide part 52 which can accommodate the magnet part 50 in the edge part by the side of the water pipe 1 of the protrusion part 44b while guiding the movement of the magnet part 50. .

  The magnet unit 50 includes a frustoconical nonmagnetic body 50a made of a nonmagnetic metal or the like, and a magnet 50b fixed to the front end surface of the nonmagnetic body 50a by bonding or the like. The magnet unit 50 is connected to the end of the support shaft 51, and the magnet unit 50 swings by rotating the support shaft 51 by rotating the linear motion handle 46 of the moving mechanism K described above. It is configured.

  By moving the linear handle 46 along the branch axis Y in the direction of the water pipe 1, the magnet unit 50 connected to the end of the support shaft 51 is moved toward the bottom of the water pipe 1. The support shaft 51 in the present embodiment is configured by a flexible wire wire. For this reason, if the linear motion handle 46 is rotated, the magnet unit 50 can be swung so as to draw an arc along the bottom surface of the water pipe 1. As a result, the magnet 50 b of the magnet unit 50 efficiently adsorbs the chips D deposited on the bottom of the water pipe 1. Note that the support shaft 51 may be formed of a tube member having no flexibility, and is not particularly limited.

  The guide portion 52 is fixed to the end portion of the protruding portion 44b on the water pipe 1 side, and has a truncated cone shape that expands toward the bottom of the water pipe 1 along the side surface of the frustoconical nonmagnetic body 50a. It is composed of a non-magnetic material. The inner surface of the guide part 52 is formed along the outer surface of the frustoconical nonmagnetic body 50 a of the magnet part 50. Due to the shape of the guide portion 52, the linear motion handle 46 is moved backward along the branch axis Y in the direction opposite to the water pipe 1, so that the magnet portion 50 that has adsorbed the chips D smoothly moves inside the guide portion 52. Is housed in.

[Bushing machine operating procedure]
The operation procedure of the bush mounting machine Z will be described with reference to FIGS.

(A) First, as shown in FIG. 1, the divided case body 7, the valve case 10, and the punching machine C are mounted on the outer peripheral surface of the branch pipe corresponding to the branch. Next, the valve body 16 is opened and the cutter 4 of the perforator C is fed through the branch pipe portion 2 of the first split case 7A, and the perforation port 5 is formed while maintaining the flow of the fluid in the water pipe 1. To do. Next, the section 1A generated along with the cutting of the perforation port 5 is moved back to the initial position while being held in the cutter 4 and the valve body 16 is closed, and then the perforator C is removed from the valve case 10.

(B) Next, as shown in FIG. 2, before inserting the bush 6 into the perforation port 5 of the water pipe 1, the diameter-enlarging operation nut 35 is rotated in a predetermined direction so as to hold the holding portion of the inner shaft member 31. 44 and the receiving portion 43 of the outer shaft member 32 are moved a little relatively close to each other, so that the elastic body 45 is expanded and deformed. Thereby, the bush 6 is temporarily held by the elastic body 45 of the bush mounting machine Z. Then, the bush mounting machine Z in which the bush 6 is temporarily held on the elastic body 45 is mounted on the valve case 10.

  That is, before inserting the bush 6 into the perforation port 5 of the water pipe 1, a part of the elastic body 45 is kept until the maximum outer diameter of a part of the elastic body 45 is larger than the outer diameter at the tip 6 b of the bush 6. The entire circumferential direction is bulged and deformed radially outward. Thereby, the step formed between the outer peripheral surface of the elastic body 45 and the tip 6b of the bush 6 can be reduced in the entire circumferential direction, and the tip 6b of the bush 6 and the protrusion 44b of the pressing portion 44 can be reduced. A part of the elastic body 45 located between them greatly contributes as a bulging output for expanding and deforming the bush 6 in diameter. As a result, for example, the bush 6 can be smoothly inserted without being caught even under a condition where the branch axis Y of the perforation port 5 and the bush insertion axis of the bush mounting machine Z are slightly shifted.

(C) Next, after opening the valve body 16, the rotary handle 42 is rotated in a predetermined direction to move the inner shaft member 31 and the outer shaft member 32 forward along the branch axis Y direction. As shown in FIG. 3, the bush temporarily held by the elastic body 45 until the contact surface 12 d of the insertion restricting portion 13 is in contact with a part of the opening peripheral edge of the perforation port 5 from the branch axis Y direction. 6 is inserted into the hole 5. At this time, in the elastic coating layer 12 that covers the outer peripheral surface of the bush 6, the branch port inner peripheral surface side portion 12A is made thinner than the thickness of the branch port outer peripheral surface side portion 12B and has a small diameter. Therefore, even if the branch axis Y of the perforation port 5 and the bush insertion axis of the bush mounting machine Z are slightly shifted, the bush 6 can be smoothly inserted without being caught.

(2) Next, as shown in FIG. 4, when the diameter-enlarging operation nut 35 is rotated in a state where the bush 6 is inserted at a predetermined position in the perforation port 5, the inner shaft member is moved with respect to the outer shaft member 32. 31 is pulled up, and the elastic body 45 is compressed from the branch axis Y direction and bulges and deforms radially outward as the receiving portion 43 and the pressing portion 44 move relative to each other. As a result, the bush 6 is deformed to expand in diameter along the inner peripheral surface 1a of the hole 5 and the inner peripheral surface of the water pipe 1, and the bush 6 is mounted in a retaining state.

  At this time, when the bushing 6 is expanded and deformed by the elastic body 45, the diameter expansion deformation amount of the branch port outer peripheral surface side portion 12B of the bush 6 is smaller than the diameter expansion deformation amount of the branch port inner peripheral surface side portion 12A. Based on this knowledge, the thickness of the branch port outer peripheral surface side portion 12B of the elastic coating layer 12 is configured to be larger than the thickness of the branch port inner peripheral surface side portion 12A. For this reason, the adhesiveness in the branch axis Y direction of the elastic coating layer 12 of the bush 6 and the hole inner peripheral surface 1a of the perforation port 5 can be improved.

(E) Next, as shown in FIGS. 2 and 5, the linear motion handle 46 is moved forward along the branch axis Y in the direction of the water pipe 1, and the magnet portion connected to the end of the support shaft 51. 50 is moved toward the bottom of the water pipe 1. As a result, the magnet 50 b of the magnet unit 50 adsorbs the chips D deposited on the bottom of the water pipe 1. At this time, the linear motion handle 46 to which the support shaft 51 composed of a flexible wire wire is connected may be rotated. Thereby, in conjunction with the rotation of the support shaft 51, the magnet unit 50 fixed to the support shaft 51 can be swung so as to draw an arc along the bottom surface of the water pipe 1. As a result, it is possible to efficiently adsorb the chips D that are widely deposited on the bottom of the water pipe 1. Further, since the discharge pipe 31B communicating with the hollow portion 31A is connected to the upper end portion of the inner shaft member 31, the chips D remaining without being adsorbed on the magnet unit 50 are removed by the discharge pipe 31B. It is discharged outside by pressure. In addition, as shown in the following (g), the diameter expansion operation nut 35 is rotated in the direction opposite to the predetermined direction, the inner shaft member 31 is pulled down with respect to the outer shaft member 32, and the elastic body 45 and the bush 6 are The linear motion handle 46 may be moved forward along the branch axis Y in the direction of the water pipe 1 with a gap formed therebetween. In this case, since it becomes possible to move the magnet part 50 toward the bottom part of the water pipe 1, reducing the diameter expansion load with respect to the elastic body 45, durability of the elastic body 45 can be improved.

(F) Next, as shown in FIG. 2 and FIG. 6, the magnet unit 50 that adsorbs the chips D by moving the linear handle 46 along the branch axis Y in the opposite direction to the water pipe 1. Is housed inside the guide portion 52. At this time, since the inner surface of the guide part 52 is formed along the outer surface of the frustoconical nonmagnetic body 50a of the magnet part 50, the magnet part 50 adsorbing the chips D can be smoothly moved inside the guide part 52. Can be moved to.

(G) Next, as shown in FIG. 7, when the diameter expansion operation nut 35 is rotated to the opposite side to the predetermined direction, the inner shaft member 31 is pulled down with respect to the outer shaft member 32, and the elastic body 45 and the bush A gap is formed between When the rotary handle 42 is rotated, the inner shaft member 31 and the outer shaft member 32 are moved backward along the branch axis Y direction, and the magnet unit 50 accommodated in the guide unit 52 is also moved backward. Next, after closing the valve body 16 and removing the bush mounting machine Z, the chips D adsorbed on the magnet unit 50 can be collected.

  Thus, the support shaft 51 that supports the magnet unit 50 is inserted using the hollow portion 31 </ b> A of the inner shaft member 31. For this reason, the chip D can be adsorbed by the magnet part 50 which contacted the bottom part of the water pipe 1 by moving the support shaft 51 forward along the branch axis Y direction by the linear motion handle 46. After adhering the chip D to the magnet unit 50, the chip D is removed from the water pipe 1 by removing the bush mounting machine Z including the chip removing mechanism R with the bush 6 left in the perforation port 5. Since it can collect | recover from a bottom part, it is not necessary to provide a chip removal apparatus separately. And since the guide part 52 is comprised so that the magnet part 50 can be accommodated, it becomes possible to remove the bush mounting machine Z in the state which accommodated the magnet part 50 which adsorb | sucked the chip D in the guide part 52. FIG. . As a result, for example, there is no inconvenience that the magnet part 50 contacts the bush 6 left in the perforation port 5 and the chips D fall. Therefore, the chip D can be reliably collected.

[Second Embodiment]
As shown in FIG. 9, a chip removal mechanism R may be configured. That is, the magnet portion 50 includes a base portion 50c fixed to the end portion of the support shaft 51, a plurality of extending portions 50d extending radially outward from the base portion 50c, and the bottom portion of the water pipe 1 among the extending portions 50d. And a magnet 50e fixed to the side surface. Moreover, the support shaft 51 in this embodiment is comprised with the tube member which does not have flexibility, and the connection site | part of the some extension part 50d and the base part 50c becomes a hinge.

  As a result, when the magnet portion 50 is moved to the bottom of the fluid pipe by the support shaft 51, the diameter of the extension portion 50 d is increased by the pushing operation of the support shaft 51, so that the magnet 50 e in direct contact with the chips D The surface area can be increased. As a result, the chips D widely deposited on the bottom of the water pipe 1 can be efficiently adsorbed by the magnet 50e.

  In addition, in this embodiment, although the connection site | part of the some extension part 50d and the base 50c comprised the hinge and divided | segmented the some extension part 50d in the circumferential direction, the extension which can be elastically deformed to radial direction outer side The part 50d may be formed in a cylindrical shape, and the extended part 50d may not be hingedly connected to the base part 50c.

[Third embodiment]
As shown in FIG. 10, the magnet part 50 may comprise the surface of the magnet 50b fixed to the front end surface of the nonmagnetic body 50a with an adhesive or the like in an arc shape. The support shaft 51 in the present embodiment is configured by a flexible wire member. In this case, since the surface of the magnet 50b is formed along the curved surface at the bottom of the water pipe 1, the chips D deposited on the bottom of the water pipe 1 can be efficiently adsorbed by the magnet 50e.

[Fourth embodiment]
As shown in FIG. 11, the magnet 50b fixed to the front end surface of the non-magnetic body 50a by adhesion or the like may be formed into an uneven shape. The support shaft 51 in the present embodiment is configured by a flexible wire member. In this case, since the surface area of the magnet 50b increases, the chips D deposited on the bottom of the water pipe 1 can be efficiently adsorbed by the magnet 50e.

[Other Embodiments]
(1) You may combine embodiment of the chip removal mechanism R mentioned above suitably. For example, the support shaft 51 in the second embodiment may be configured by a wire wire, and the support shaft 51 in the third to fourth embodiments may be configured by a tube member that does not have flexibility. .
(2) In the chip removal mechanism R described above, the nonmagnetic material 50a is provided in the magnet unit 50, but the entire magnet unit 50 may be configured of a magnetic material. In this case, you may comprise the whole magnet part 50 in spherical shape.
(3) In the above-described embodiment, the end portion of the outer shaft member 32 on the fluid pipe side is configured by the cylindrical metal receiving portion 43 attached to the lower end portion, but the lower end portion of the outer shaft member 32 is The receiving portion 43 may be configured to project integrally outward in the radial direction. Moreover, although the protrusion part 44b was formed in the holding | suppressing part 44 of the inner shaft member 31, you may comprise the protrusion part 44b by making the lower end part of the outer shaft member 32 protrude integrally in a radial direction outer side.
(4) In the embodiment described above, the perforation port 5 is formed in the upper wall of the water pipe 1 in the direction of the branch axis Y, but the water pipe in the direction perpendicular to the pipe axis X of the water pipe 1 and the branch axis Y A perforation port 5 may be formed in the side wall of 1, and the bush 6 may be attached to the perforation port 5 using a bush attachment machine Z. In this case, if the support shaft 51 of the chip removal mechanism R is formed of a wire wire, it is possible to adsorb the chip D deposited on the bottom of the water pipe 1 by dropping the magnet unit 50 in the direction of gravity. Is preferable.
(5) In the above-described embodiment, the example in which the bush 6 is mounted on the perforation port 5 of the cast iron water pipe 1 which is an example of the fluid pipe using the bush mounting machine Z has been described. The bush 6 may be attached to a branch hole or the like formed in the tube 1. The fluid pipe is not limited to the water pipe 1 as long as it is a pipe through which gas or liquid flows.

  INDUSTRIAL APPLICABILITY The present invention can be used in a bush mounting machine that mounts a bush having an elastic coating layer that contacts an inner peripheral surface of a branch port formed through a fluid pipe.

1: Water pipe (fluid pipe)
5: Perforated port (branch port)
6: Bush 12: Elastic coating layer 31: Inner shaft member 31A: Hollow portion 32: Outer shaft member 43: Receiving portion (end portion on the fluid pipe side of the outer shaft member)
44b: protrusion 45: elastic body 46: linear motion handle (operation part)
50: Magnet part 50c: Base part 50d: Extension part 50e: Magnet 51: Support shaft 52: Guide part D: Chip K: Movement mechanism R: Chip removal mechanism Y: Branch shaft (shaft core)
Z: Bush mounting machine

Claims (5)

A bush mounting machine for mounting a bush having an elastic coating layer in contact with the inner peripheral surface of a branch port formed through the fluid pipe,
An inner shaft member having a hollow portion penetrating in the axial direction and a projecting portion projecting radially outward from the end portion on the fluid pipe side;
An outer shaft member in which the inner shaft member is inserted;
A moving mechanism for moving the inner shaft member and the outer shaft member forward and backward along the axial direction;
The outer shaft member is sandwiched between the end portion on the fluid pipe side and the protruding portion, and the diameter is increased by moving the outer shaft member and the inner shaft member relatively close to each other by the moving mechanism. An elastic body,
A bush mounted on the outside of the elastic body;
A chip removal mechanism for removing chips present at the bottom of the fluid pipe,
The chip removal mechanism includes a magnet part that is movable to the fluid pipe side relative to the projecting part, a support shaft that is inserted into the hollow part and supports the magnet part, and the support shaft along the axial direction. A bush mounting machine having an operation part for moving forward and backward.   2. The bush mounting machine according to claim 1, wherein a guide portion capable of accommodating the magnet portion while guiding the movement of the magnet portion is formed at an end portion of the protruding portion on the fluid pipe side.   The bush mounting machine according to claim 1 or 2, wherein the support shaft is made of a wire wire having flexibility.   The bush mounting machine according to claim 1 or 2, wherein the support shaft is configured by a pipe member having no flexibility. The magnet portion is fixed to a base portion fixed to an end portion of the support shaft, an extension portion extending radially outward from the base portion, and a surface of the extension portion on the bottom side of the fluid pipe. A magnet,
The bush mounting machine according to any one of claims 1 to 4, wherein the extension portion has a hinge connected to the base portion.

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