JP2014043933A - Fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture enabled to enhance the precision of mounting a spigot ring in a spigot portion and to be mounted without requiring any complex trouble, by applying a force equivalently in a diameter-reducing direction to the spigot ring when the spigot ring is mounted on the outer peripheral surface of the spigot portion.SOLUTION: A fixture 30 for a diametrically shrinkable spigot ring 11 is mounted on the outer peripheral surface of a spigot portion to be inserted into a socket portion. The fixture 30 comprises: retightenable winding means 31 wound on the outer circumference of the spigot ring 11; and construction means 32 constructed at the two ends of the winding means 31 for reducing the spigot ring 11 diametrically in cooperation with the retightenable winding means 31. The construction means 32 is constituted not to cover a stationary portion S between the spigot ring 11 and the spigot portion.

Description

  The present invention relates to an attachment jig for fixing an insertion ring to an outer peripheral surface of an insertion portion which is an end portion of a pipe or the like.

  Conventionally, in order to fix the insertion ring to the outer peripheral surface of the insertion portion, a ring groove is formed to provide the insertion ring in the insertion portion, and the insertion ring and the rivet are used to fix the insertion ring to the ring groove. However, at that time, after fixing the insertion ring with a plurality of clam vise etc. and once inserting “scratch”, remove and drill the rivet hole according to the scribing on the insertion ring, The troublesome work of fixing with rivets and riveting has been performed (hereinafter referred to as “prior art”; see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-315978 (page 4, FIG. 10)

  However, in the prior art, not only does the installation take time, but also the accuracy of mounting of the insertion ring, that is, the accuracy of installation cannot be increased because the insertion ring cannot be uniformly reduced in diameter in the circumferential direction. was there.

  The present invention has been made paying attention to such problems, and when attaching the insertion ring to the outer peripheral surface of the insertion portion, the force in the reduced diameter direction against the insertion ring is caused to act equally in the circumferential direction, It is an object of the present invention to provide an attachment jig that can improve the accuracy of attaching the insertion ring to the insertion portion and that can be attached without requiring troublesome work.

In order to solve the above problems, the mounting jig of the present invention is
A mounting jig for a diameter-reducing insertion ring that is attached to the outer peripheral surface of the insertion part to be inserted into the receiving part,
Winding means that is wound around the outer peripheral surface of the insertion ring and that can be tightened further, and is installed at both ends of the winding means and reduces the diameter of the insertion ring in cooperation with the winding means. Means and
The erection means is configured not to cover a fixing portion between the insertion ring and the insertion portion.
According to this feature, the tightening means wound around the outer peripheral surface of the insertion ring can uniformly apply a force in the diameter reducing direction to the insertion ring in the circumferential direction. In addition to being able to abut along the part, the operator approaches the fixing part through the uncovered part of the installation means, so that the insertion ring that has been reduced in diameter by the reduction means is inserted. It can be easily and accurately attached to the part.

The mounting jig of the present invention is
The erection means is constituted by a plate-like member having an opening at a portion corresponding to the fixed portion.
According to this feature, the detaching operation of the erection means is easy, and the fixing operation at the fixing portion can be easily performed without any trouble.

The mounting jig of the present invention is
The erection means is composed of a plurality of wires spaced apart so as to sandwich the fixing portion in the axial direction.
According to this feature, a force in the diameter reducing direction can be evenly applied to the insertion ring in the circumferential direction according to the tension of the winding means, and the fixing operation at the fixing portion can be easily performed without any trouble. .

The mounting jig of the present invention is
The winding tightening means is provided with an axial positioning protrusion for determining an axial position with respect to the insertion ring.
According to this feature, the axial positioning of the winding means relative to the insertion ring can be easily and reliably performed.

The mounting jig of the present invention is
The erection means is provided with a circumferential positioning protrusion for determining a circumferential position with respect to the insertion ring.
According to this feature, the circumferential positioning of the erection means with respect to the insertion ring can be performed easily and reliably.

The mounting jig of the present invention is
A positioning plate for axial positioning is mounted on the adjustment side belt of the winding means.
According to this feature, it is possible to prevent the axial displacement of the adjustment side belt with respect to the insertion ring.

1 is a cross-sectional view of a main part of a pipe joint according to Example 1. FIG. (A) is a front view of the insertion ring in FIG. 1, (b) is an AA arrow view of (a), (c) is BB sectional drawing of (b). is there. (A) is a front view which shows the use condition of the attachment jig which concerns on Example 1, (b) is a side view similarly, (c) is a top view similarly. (A) is a front view which shows the attachment jig which concerns on Example 1, (b) is a side view similarly, (c) is also a top view. (A) is a front view which shows the construction means based on Example 1, (b) is a side view similarly, (c) is also a top view. (A) is a front view which shows the attachment jig which concerns on Example 2, (b) is a side view similarly, (c) is a top view similarly. (A) is a front view which shows the construction means based on Example 2, (b) is a side view similarly, (c) is also a top view. (A) is a front view which shows the positioning plate for belts of the winding means which concerns on Example 1 and 2, (b) is a top view similarly.

  EMBODIMENT OF THE INVENTION The form for implementing the attachment jig concerning this invention is demonstrated below based on an Example.

  A mounting jig according to the first embodiment will be described with reference to FIGS. Hereinafter, the front side of the sheet of FIG. 1 will be described as the front side of the mounting jig.

  As shown in FIG. 1, the insertion tube 1 as a fluid tube 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 has an inner peripheral surface. Is covered with a mortar layer (not shown). In addition, 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. In the present embodiment, the fluid in the fluid pipe is not limited to the clean water of the present embodiment, but may be, for example, industrial water, agricultural water, sewage, etc., or a gas-liquid mixture of gas and gas and liquid. Absent.

  Moreover, the outer peripheral surface of the insertion tube 1 is coated to prevent corrosion. The distal end portion of the insertion tube 1 is configured as an insertion portion that is inserted into the reception portion 3 formed at the end portion of the reception tube 2. The receiving tube 2 is also made of ductile cast iron like the insertion tube 1 and is formed in a substantially circular shape in cross section. The inner peripheral surface is covered with a mortar layer (not shown). Furthermore, the outer peripheral surface and the end of the receiving tube 2 are also coated to prevent corrosion.

  As shown in FIG. 1, the receiving portion 3 is a portion having a larger diameter than other portions of the receiving tube 2, and the tip of the receiving portion 3 has an inner diameter larger than the outer diameter of the insertion tube 1. Is also formed on the inner peripheral surface of a large diameter. In addition, a packing holding strip 5 that is a groove for holding a rubber-made annular packing 4 is formed on the inner peripheral surface at the tip of the receiving port 3. Further, a lock ring holding strip 7 which is a groove for holding the metal lock ring 6 is formed on the inner side of the packing holding strip 5. The lock ring 6 is held by the lock ring holding strip 7 in a state where a rubber centering ring 8 that defines the axis of the lock ring 6 is disposed on the outer periphery thereof.

  In addition, an insertion portion that is an end portion of the insertion tube 1 on the tube axis direction side is inserted into the reception portion 3 of the reception tube 2. The insertion tube 1 is cut at, for example, a construction site in order to adjust the length thereof, and the end surface 9 of the insertion tube 1 is connected to the insertion tube 1 with respect to the tube axis. The cut surface is formed by cutting substantially orthogonally. A metal substrate (in this embodiment, ductile cast iron) of the insertion tube 1 itself is exposed on the end surface 9 which is a cut surface.

  An anticorrosion ring 10 for preventing corrosion of the end surface 9 is attached to the end surface 9 of the insertion tube 1. Further, a metal insertion ring 11 is attached so as to cover the outside of the anticorrosion ring 10. When the insertion tube 1 is attached to the receiving tube 2, the packing 4, the centering ring 8 and the lock ring 6 are attached to the inner peripheral surface of the receiving tube 2, and the distal end of the insertion tube 1 is attached. With the anticorrosion ring 10 and the insertion ring 11 attached, the insertion tube 1 is pushed into the receiving portion 3 of the receiving tube 2.

  In addition, the packing 4 expands in diameter when the insertion ring 11 attached to the insertion tube 1 is pushed. Further, the lock ring 6 has a substantially C shape in a front view in which a part of its circumference is cut out, and the lock ring 6 expands together with the centering ring 8 when the insertion ring 11 is pushed. The diameter can be adjusted.

  Further, after the insertion tube 1 is inserted into the receiving portion 3 of the receiving tube 2, the inside of the inserted insertion tube 1 and the receiving tube 2 that are connected to each other is sealed in a sealing manner by the packing 4. The insertion tube 1 is held by the lock ring 6 and the insertion ring 11 so as not to be detached from the receiving portion 3 of the receiving tube 2. More specifically, the insertion tube 11 that protrudes in the outer diameter direction from the outer surface of the insertion tube 1 is engaged with the lock ring 6 in the tube axis direction, so that the insertion tube 1 receives the reception tube 2. It is held so as not to escape from the mouth 3.

  Next, the insertion ring 11 will be described with reference to FIGS. 2 (a), (b), and (c). The insertion ring 11 includes a cylindrical portion 21 having a short metal shape, and a reduced diameter portion 22 that is reduced in diameter so as to cover the end surface 9 of the insertion tube 1 together with the anticorrosion ring 10. ing. Further, the insertion ring 11 is partially cut away in the circumferential direction to form a divided portion 23, and has a substantially C shape as a whole.

  The inner diameter of the cylindrical portion 21 of the insertion ring 11 is slightly larger than the outer diameter of the insertion tube 1. Further, an insertion hole 24 through which a tapping screw (not shown) for fixing the insertion ring 11 to the insertion tube 1 is inserted is formed in the vicinity of the dividing portion 23 in the cylindrical portion 21 of the insertion ring 11. Yes. The diameter-reduced portion 22 of the insertion ring 11 is formed with a notch 25 that is notched in the radial direction. Further, on the inner peripheral surface of the cylindrical portion 21 of the insertion ring 11, a ridge 26 extending along the circumferential direction is formed.

  In order to attach the insertion ring 11 as shown in FIG. 1, a lubricant is applied to the outer peripheral surface of the insertion tube 1, and the insertion ring 11 is inserted so as to cover the outer side of the anticorrosion ring 10. The insertion ring 11 is shrunk using the divided part 23 and the notch part 25 of the insertion ring 11 using a mounting jig 30 described later in a state where the convex line 26 is loosely fitted in the groove 27 of one. Then, the tapping screw (not shown) is screwed into the insertion hole 24 formed in the insertion ring 11, and the insertion ring 11 is fixed to the insertion tube 1. . A portion for fixing the insertion ring 11 to the insertion tube 1 by fixing means such as screwing a tapping screw into the insertion hole 24 formed in the insertion ring 11 is referred to as a “fixing portion S” in this specification.

  Next, the mounting jig 30 will be described with reference to FIGS. The mounting jig 30 is mainly wound around the outer peripheral surface of the insertion ring 11, and can be tightened by tightening means 31, and is installed on both ends of the winding means 31, and cooperates with the winding means 31. It is composed of erection means 32 for reducing the diameter of the insertion ring 11.

  The winding means 31 is, for example, a known mechanism called a ratchet belt fastener or a ratchet buckle that can be tightened and released (for example, Japanese Utility Model Publication No. 51-28118, Japanese Utility Model Publication No. 2-65738, Japanese Patent Application Laid-Open No. 2-65738). (See the invention described in Japanese Patent Application Laid-Open No. 2010-112537), and an example thereof will be described below. In the following description, the winding means 31 may be referred to as a ratchet buckle 31.

  As shown in FIG. 4, the ratchet buckle 31 includes a main body frame 33, a belt take-up shaft 34 inserted into a hole formed in one end of the main body frame 33, and the belt take-up shaft 34 at the end. A handle 35 inserted into the hole and a stationary side belt shaft 36 inserted into the hole formed at the other end of the main body frame 33 are provided.

  The main body frame 33 includes a pair of left and right flat side wall portions 33a and 33b arranged in parallel to each other in the width direction. The interval between the side wall portions 33a and 33b is set to be larger than the width of the adjustment side belt 37 (see FIG. 3) and the end portion of the installation means 32. Moreover, the side wall part 33a and the side wall part 33b are united by the baseplate part 33c extended in the width direction inner side from each lower end part. Further, of the pair of side wall portions, one side wall portion 33 a is engaged with the end side surface 21 a (see FIG. 3A) of the cylindrical portion 21 of the insertion ring 11 to insert the latinette buckle 31. An axial positioning protrusion 33d for determining an axial position with respect to the mouth ring 11 is provided. The axial positioning protrusion 33d is formed so as to protrude downward from the lower portion of the side wall 33a, for example. Further, a fixed side belt shaft 36 is attached to the other end portion of the main body frame 33 so as to be rotatable with respect to the side wall portions 33a and 33b. One end of the erection means 32 is attached to the fixed side belt shaft 36 as will be described later.

  The belt take-up shaft 34 is inserted into two shaft holes formed in ratchet gears 38, 38 provided on the left and right sides, and is connected by locking pins 39 at both end portions. The belt take-up shaft 34 is pivotally supported at both end portions thereof so as to be rotatable with respect to the side wall portions 33 a and 33 b of the main body frame 33.

  The handle 35 includes a gripping member 35a and a pair of left and right handle support plates 35b and 35c having one end fitted into both ends of the gripping member 35a. A hole into which the belt take-up shaft 34 is inserted is provided at the base end portion of the handle support plates 35b and 35c.

  Next, the belt winding mechanism will be described. The belt winding shaft 34 and the ratchet gears 38 and 38 are fixed to each other and rotate together. A drive plate 40 is provided between the handle support plates 35b and 35c so as to mesh with the teeth of the two ratchet gears 38 and 38. The drive plate 40 is provided so as to be movable forward and backward with respect to the handle support plates 35b and 35c so that the tip end portion faces the belt take-up shaft 34 side. And it is urged | biased by the belt winding shaft 34 direction with the spring 41 attached to the handle | steering-wheel support plates 35b and 35c.

  Further, a stop plate 42 is provided between the side wall portions 33 a and 33 b of the main body frame 33 so as to mesh with the teeth of the two ratchet gears 38 and 38. The stop plate 42 is provided so as to be movable back and forth with respect to the side wall portions 33a and 33b so that the tip end portion faces the belt take-up shaft 34 side. Further, the center of the rear end portion of the stop plate 42 is a rod-like protrusion, and a spring 43 is inserted into this protrusion. The stop plate 42 is biased in the direction of the belt take-up shaft 34 by the spring 43 inserted into the protrusion.

  Now, as shown in FIG. 3B, when the handle 35 is rotated in the opening direction O with respect to the main body frame 33, the tip of the drive plate 40 provided on the handle 35 is brought into contact with the ratchet gears 38, 38. Since the teeth mesh with each other, the belt take-up shaft 34 rotates together with the handle 35 in the opening direction O. At this time, when the turning force of the handle 35 exceeds the biasing force of the spring 43, the tip of the stop plate 42 provided on the main body frame 33 biases the spring 43 so as to get over the teeth of the ratchet gears 38, 38. It retracts once in a direction opposite to the direction, and then meshes with the teeth of the ratchet gears 38 and 38 again by the biasing force of the spring 43.

  Next, when the handle 35 is rotated in the closing direction C with respect to the main body frame 33, the rotational force of the handle 35 exceeds the urging force of the spring 41, so that the distal end portion of the drive plate 40 has a ratchet gear. Since the spring 41 is retracted in the direction opposite to the biasing direction of the spring 41 so as to get over the teeth of 38 and 38, the handle 35 rotates in the closing direction C. On the other hand, the belt winding shaft 34 does not rotate because the tip of the stop plate 42 meshes with the teeth of the ratchet gears 38, 38. That is, the handle 35 rotates in the closing direction C, but the belt winding shaft 34 does not rotate. Therefore, the belt winding shaft 34 is only rotated in one direction R by the rotation operation of the handle 35 in the opening direction O and the closing direction C. Thus, by repeatedly rotating the handle 35 in the opening direction O and the closing direction C, the adjustment side belt 37 can be wound around the belt winding shaft 34 and tightened.

  Next, when removing the adjustment side belt 37 wound around the belt take-up shaft 34, first, the belt take-up shaft 34 and the stop plate 42 are resisted against the urging force of the spring 41 and the spring 43, respectively. The tip of the drive plate 40 and the stop plate 42 is retracted so that the tip of the drive plate 40 and the stop plate 42 does not mesh with the teeth of the ratchet gears 38, 38. As a result, the belt take-up shaft 34 rotates freely. Then, by pulling the adjustment side belt 37, the adjustment side belt 37 wound around the belt winding shaft 34 can be removed. Incidentally, when the adjustment side belt 37 wound around the belt take-up shaft 34 is removed, the adjustment side belt 37 is not necessarily limited to the above-described embodiment. For example, as shown in FIG. , The portion of the handle support plates 35b, 35c bulged in the radial direction of the belt take-up shaft 34 is pressed against the stop plate 42, and the tip of the plate 42 is retracted. Thus, the belt winding shaft 34 may be freely rotated.

  As shown in FIG. 3 (b), the erection means 32 has both ends of the winding means 31, specifically, the adjustment side wound around the fixed side belt shaft 36 and the belt winding shaft 34 of the winding means 31. It is installed on the end portion 37 a of the belt 37 and functions to reduce the diameter of the insertion ring 11 in cooperation with the winding means 31. More specifically, the erection means 32 includes a main body portion 45 composed of a plate-like member formed of a spring steel material or the like, and the main body portion 45 has a fixing portion S (insertion between the insertion ring 11 and the insertion portion). A portion corresponding to the fixing portion S so as to be exposed without covering the portion that fixes the insertion ring 11 to the insertion tube 1 by fixing means such as screwing a tapping screw into the insertion hole 24 formed in the mouth ring 11. An opening 46 is provided in the front. Although the shape of the opening part 46 is not specifically limited, For example, an ellipse, an ellipse, a rectangle etc. can be considered.

  A connection fitting 47 is disposed between the erection means 32 and the adjustment side belt 37 of the winding means 31. The connecting metal fitting 47 includes a pair of flat side plates 47a and 47b arranged in parallel with each other in the width direction. The distance between the side plates 47 a and 47 b is set to be larger than the width of the adjustment side belt 37. The adjustment side belt shaft 48 is attached to one side in the longitudinal direction of the side plates 47a and 47b, and the installation means shaft 49 is attached to the other side. In addition, in order to determine the axial position of the connection fitting 47 with respect to the insertion ring 11, an axial positioning protrusion 47 c is provided at the lower portion of the flat side plate 47 a. The axial positioning protrusion 47c is formed so as to protrude downward from the lower portion of the side plate 47a, for example. The connecting metal fitting 47 is provided for the purpose of connecting the erection means 32 and the adjustment side belt 37 of the winding means 31 and is not necessarily required. The adjustment side belt 37 of the winding means 31 may be directly connected.

  As shown in FIG. 5, the side walls of both ends of the body portion 45 of the erection means 32 protrude to the side opposite to the side in contact with the surface of the cylindrical portion 21 of the insertion ring 11, that is, the outer diameter side. Flat plate-like brackets 50 and 51 arranged in parallel with each other are formed by bending or welding. Further, the bracket 50 corresponding to the fixed side belt shaft 36 of the winding means 31 is provided with a hole 50 a for inserting the fixed side belt shaft 36, and the bracket 51 corresponding to the erection means shaft 49 of the connecting metal 47 47 is formed. Is provided with a hole 51a through which the installation means shaft 49 is inserted.

  Further, in the vicinity of the opening 46 of the main body 45, the pair of circumferential positioning protrusions 52 are bent or welded so as to protrude to the side in contact with the surface of the cylindrical portion 21 of the insertion ring 11, that is, the inner diameter side. It is formed by processing. These circumferential positioning protrusions 52 project into the split portion 23 of the insertion ring 11 so that the erection means 32 is not displaced in the circumferential direction with respect to the fixing portion S between the insertion ring 11 and the insertion portion. It is for doing so. In this example, the pair of circumferential positioning protrusions 52 are formed so as to cut out part of the main body 45 facing the both sides in the width direction at substantially the center in the circumferential direction of the opening 46. Has been.

  As shown in FIG. 3 (b), the fixing side belt shaft 36 of the winding means 31 is inserted through the bracket 50 of the installation means 32 to connect the installation means 32 and the winding means 31, and the winding means 31 is adjusted. The adjustment side belt shaft 48 of the connection fitting 47 is inserted into the end of the side belt 37 to connect the adjustment side belt shaft 48 and the connection fitting 47, and the installation means shaft of the connection fitting 47 is connected to the bracket 51 of the installation means 32. 49, the installation means 32 is connected to the connection fitting 47, and the length of the adjustment side belt 37 is adjusted by operating the handle 35 of the winding means 31, so that the attachment jig 30 is inserted into the insertion ring 11. Temporary placement on the outer peripheral surface of the.

  Next, the circumferential positioning protrusion 52 of the laying means 32 is easily and reliably positioned so that the circumferential positioning protrusion 52 protrudes into the dividing portion 23 of the insertion ring 11, and the axial positioning of the winding fastening means 31 is performed. The protrusion 33d is engaged with the end side surface 21a of the cylindrical portion 21 of the insertion ring 11, and the axial positioning of the mounting jig 30 with respect to the insertion ring 11 is easily and reliably performed.

  When the mounting jig 30 is positioned, the adjustment side belt 37 is wound around the belt winding shaft 34 by repeatedly rotating the handle 35 of the winding means 31 in the opening direction O and the closing direction C. Thus, a desired retightening can be performed. Accordingly, the insertion ring 11 is reduced in diameter and is brought into close contact with the outer peripheral surface of the insertion tube 1. Subsequently, in a state where the diameter of the insertion ring 11 is reduced by the attachment jig 30, a tapping screw (not shown) is screwed into the insertion hole 24 formed in the insertion ring 11, and the insertion ring 11 is inserted into the insertion tube 1. Fix it.

  In order to disengage the mounting jig 30 from the insertion ring 11, the front ends of the drive plate 40 and the stop plate 42 of the winding means 31 are retracted from the teeth of the ratchet gears 38, 38, and the belt winding shaft 34 is free. By pulling the adjustment side belt 37 in a rotating state, the adjustment side belt 37 wound around the belt take-up shaft 34 can be removed, so that the attachment jig 30 can be detached from the insertion ring 11.

  As described above, in the first embodiment, the tightening means 31 is wound around the outer peripheral surface of the insertion ring 11 and can be additionally tightened, and is installed at both ends of the tightening means 31. The installation means 32 for reducing the diameter of the insertion ring 11 in cooperation with the insertion ring 11 is configured so as not to cover the fixing portion S between the insertion ring 11 and the insertion part. A force in the diameter-reducing direction can be evenly applied to the ring 11 in the circumferential direction, and the insertion ring 11 can be brought into contact with the insertion portion. By approaching the fixing portion S through the non-removable portion, the insertion ring 11 having a diameter reduced by the diameter reducing means can be easily and accurately attached to the insertion portion.

  Further, the erection means 32 is constituted by a plate-like member having an opening 46 at a portion corresponding to the fixing portion S, so that the detaching operation of the erection means 32 is easy and the fixing operation at the fixing portion S is performed. It can be done easily without any trouble.

  A mounting jig according to the second embodiment will be described with reference to FIGS. 6 and 7. The mounting jig according to the second embodiment is different from the first embodiment in the construction of the erection means, but the other parts are the same as those in the first embodiment. Hereinafter, the same members as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  6 and 7, the erection means 32 is formed by fixing means such as screwing a tapping screw into the insertion hole 24 formed in the insertion ring 11 as shown in FIG. 3 (c). The body portion 55 includes two wire rods 56 and 56 spaced apart so as to sandwich the insertion ring 11 to the insertion tube 1 in the axial direction. The body portion 55 is inserted into the insertion ring 11. It is comprised so that the fixing | fixed part S with a mouth part may not be covered. Note that the number of wires is not limited to two, and may be three or more.

  Each wire 56 has, for example, loop portions 60 formed at both ends of a stainless wire 57, and a base end of the loop portion 60 is caulked by a caulking member 59, and a polyurethane-coated tube is formed on the outer surface of the stainless wire 57. 58 is formed. Further, it can be easily attached to the fixed side belt shaft 36 of the winding means 31 and the erection means shaft 49 of the coupling metal 47.

  A circumferential positioning protrusion 61 is provided in the vicinity of the central portion in the longitudinal direction of the main body portion 55 so as to protrude to the side in contact with the surface of the cylindrical portion 21 of the insertion ring 11, that is, the inner diameter side. The circumferential positioning protrusion 61 protrudes into the divided portion 23 of the insertion ring 11 so that the erection means 32 is not displaced in the circumferential direction with respect to the fixing portion S between the insertion ring 11 and the insertion portion. It is for doing so. The circumferential positioning protrusion 61 spans between the two wire rods 56, 56, and has a plate-like bridging portion 61a wound around and fixed to each of the wire rods 56, 56, and a bridging portion 61a in the vicinity of the central portion of the bridging portion 61a. Projecting portions 61b projecting from both sides to the inner diameter side.

  As described above, in the second embodiment, the laying means 32 is composed of the plurality of wire members 56 that are spaced apart so as to sandwich the fixing portion S in the axial direction, and is inserted according to the tension of the winding means 31. A force in the diameter reducing direction can be evenly applied to the mouth ring 11 in the circumferential direction, and the fixing operation of the insertion ring 11 in the fixing portion S can be easily performed without any trouble.

  FIG. 8 is a diagram illustrating a positioning plate that positions the adjustment side belt 37 of the winding means 31 according to the first and second embodiments. In FIG. 8, the belt positioning plate 65 is formed of, for example, a plate-like member, has a substantially square shape in plan view, and has two openings 66, 66 along the longitudinal direction of the adjustment side belt 37. Separately leaving 67. Further, one side portion of the belt positioning plate 65 is engaged with the end side surface 21 a (see FIG. 3A) of the cylindrical portion 21 of the insertion ring 11 to insert the adjustment side belt 37. An axial positioning protrusion 68 for determining the axial position with respect to the ring 11 is provided. The axial positioning protrusion 68 is provided, for example, so as to protrude in the inner diameter direction so as to be orthogonal to the surface of the belt positioning plate 65 from one side of the belt positioning plate 65.

  In order to attach the belt positioning plate 65 to the adjustment side belt 37, the end of the adjustment side belt 37 is inserted from the lower side of the opening 66 on one side of the two openings 66, 66, and then the center What is necessary is just to insert from the upper side of the other opening part 66 through the part 67. FIG. If the belt positioning plate 65 is attached to the adjustment side belt 37, the axial displacement of the adjustment side belt 37 with respect to the insertion ring 11 can be prevented.

  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, the case where the erection means is constituted by a plate-like member and a plurality of wire members has been shown. However, the present invention is not limited to this, and the main point is that the fixing part is not covered. Any means may be used as long as it can reduce the diameter of the insertion ring in cooperation with the winding means. For example, the insertion ring may be constituted by a belt. Further, for example, a covering material made of a soft resin material or the like may be applied to the inner surface portion of the main body portion 45 of the erection means 32 in the first embodiment, and in this way, the insertion ring 11 that contacts the portion. It is possible to prevent the outer peripheral surface from being damaged.

DESCRIPTION OF SYMBOLS 1 Insertion pipe 2 Receptacle pipe 3 Receptacle part 4 Packing 5 Packing holding strip 6 Lock ring 7 Lock ring holding strip 8 Centering ring 9 End face 10 Corrosion prevention ring 11 Insertion ring 21 Cylindrical part 22 Reduced diameter part 23 Divided part 24 Insertion hole 25 Notch 26 Convex 27 Groove 30 Mounting jig 31 Ratchet buckle (winding means)
32 Mounting means 33 Body frame 34 Belt take-up shaft 35 Handle 36 Fixed side belt shaft 37 Adjustment side belt 38 Ratchet gear 39 Locking pin 40 Drive plate 41 Spring 42 Stop plate 43 Spring 45 Body portion 46 Opening portion 47 Connecting bracket 48 Adjustment Side belt shaft 49 Installation means shaft 50, 51 Bracket 52 Circumferential positioning projection 55 Main body 56 Wire rod 57 Stainless steel wire 58 Covered tube 59 Caulking member 60 Loop portion 61 Circumferential positioning projection 65 Belt positioning plate 68 Axial position Fixed protrusion S fixed part

Claims (6)

A mounting jig for a diameter-reducing insertion ring that is attached to the outer peripheral surface of the insertion part to be inserted into the receiving part,
Winding means that is wound around the outer peripheral surface of the insertion ring and that can be tightened further, and is installed at both ends of the winding means and reduces the diameter of the insertion ring in cooperation with the winding means. Means and
The mounting means is configured so as not to cover a fixing portion between the insertion ring and the insertion portion.   The mounting jig according to claim 1, wherein the erection means includes a plate-like member having an opening in a portion corresponding to the fixing portion.   2. The mounting jig according to claim 1, wherein the erection means is composed of a plurality of wires separated so as to sandwich the fixing portion in the axial direction.   The mounting jig according to any one of claims 1 to 3, wherein the winding means is provided with an axial positioning protrusion for determining an axial position with respect to the insertion ring.   The mounting jig according to any one of claims 1 to 4, wherein the erection means is provided with a circumferential positioning protrusion for determining a circumferential position with respect to the insertion ring.   The mounting jig according to any one of claims 1 to 5, wherein a positioning plate for positioning in the axial direction is attached to the adjustment side belt of the winding means.

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