JP2001009752A - Disassembling method of tube fitting and disassembling jig used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and easily release connecting of both tube parts from outside by small labour at the time when disassembly of a tube fitting is required for maintenance inspection, part replacement, etc. SOLUTION: This disassembling method is to connect a socket tube part 1 and an insertion tube part for locking in a closed state. In this case, a plural number of narrow flat plate type disassembling plates 7 furnished with thickness to extend and displace a locking member 4 in diameter in a locking releasing state and head ends which are formed sharp are prepared, and each of the disassembling plates 7 fitted on an outer peripheral surface 2a of the insertion tube part along the tube shaft center X direction is inserted and moved between an inner peripheral surface of a sealing material 3 and the outer peripheral surface 2a of the insertion tube part and an inner peripheral surface of the locking member 4 and the outer peripheral surface 2a of the insertion tube part while giving to it vibration by an agitator A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of disassembling a pipe joint used for connecting fluid transport pipes such as water pipes and gas pipes or connecting a fluid transport pipe to a connection pipe section of an on-off valve. More specifically, even if a tensile force due to uneven settlement or an earthquake, etc. acts, the inner peripheral surface of the receiving pipe section and the An annular sealing material compressed between the outer peripheral surface of the insertion tube portion to be inserted, and a pipe shaft with respect to a projection on the distal end side of the outer peripheral surface of the inserting tube portion inserted to a position passing through the sealing material. The two pipe parts are sealed via a retaining member that is displaceable to the enlarged diameter side against the elastic restoring force from a retaining state contacting from the core direction to a retaining release state that allows the protrusion to pass therethrough, against the elastic restoring force. The present invention relates to a method for disassembling a pipe joint which is retained and connected in a state and an improvement of a dismantling jig used for the method.

[0002]

2. Description of the Related Art In this type of pipe joint, as shown in FIGS. 1 to 4, annular grooves 1b and 1c formed at two locations in an X direction of a pipe axis on an inner peripheral surface 1a of the receiving pipe portion 1. A sealing member 3 made of an elastic material such as rubber and a substantially ring-shaped retaining member 4 cut at one location in the circumferential direction are attached to the receiving tube 1 and the insertion tube 2 Is inserted, the sealing member 3 is pressed against the inner peripheral surface of the annular groove 1b of the receiving tube portion 1 and is compressed and deformed toward the enlarged diameter side. Against the elastic restoring force of the elastic ring 5 and the elastic restoring force of the centering elastic ring 5 arranged on the outer peripheral side thereof, the displacing side is displaced toward the diameter increasing side until the retaining state is released, and the projection 6 of the insertion tube portion 2 has passed. At this time, the retaining member 4 in the retaining release state is reduced to the retaining state by the elastic restoring force. Therefore, by simply inserting the insertion tube portion 2 into the receiving tube portion 1, not only the both tube portions 1 and 2 can be connected and stopped in a sealed state, but also due to uneven settlement, earthquake and the like. Even if a tensile force acts, as shown in FIG.
And the stopper member 4 held in the annular groove 1c of the receiving tube portion 1 abuts from the tube axis X direction, and the receiving tube portion 1 and the insertion tube portion 2
The sealing member 3 and the retaining member 4 have an advantage that they can strongly prevent the detachment from the receiving tube portion.
Is enclosed between the inner peripheral surface 1a and the outer peripheral surface 2a of the insertion tube portion 2 so that it is necessary to disassemble for maintenance and inspection, replacement of parts, or to reassemble the pipe joint. It is desired that the connection between the two pipe sections 1 and 2 can be easily released from the outside when the occurrence of the problem occurs. Therefore, conventionally, as shown in FIGS. 18 and 19, it is possible to insert the inner peripheral surface 1a of the receiving tube portion 1 and the outer peripheral surface 2a of the insertion tube portion 2 in the tube axis X direction, and Dismantling cylinder 5 formed to have the same dimensions as the protrusion allowance of projection 6 in insertion tube portion 2 in the radial direction.
0 is constituted by an arc-shaped divided dismantling plate 50A divided into three in the circumferential direction, and an external force receiving portion 51 protruding outward in the radial direction is fixed to the base end of each divided dismantling plate 50A. Was. Then, each of the divided dismantling plates 50A applied to the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction,
While hitting the external force receiving portion 51 with a hammer or the like, between the inner peripheral surface of the sealing material 3 and the outer peripheral surface 2a of the insertion tube portion 2, and between the inner peripheral surface of the retaining member 4 and the insertion tube portion 2. The connection is released by moving the two pipe portions 1 and 2 relatively to each other in a state in which the stopper member 4 is inserted and moved between the outer peripheral surface 2a and the retaining member 4 is displaced toward the enlarged diameter side in the retaining release state. JP-A-11-10
No. 4972).

[0003]

In the conventional pipe joint disassembly method, since the arc-shaped split disassembly plate 50A having a wide width along the outer peripheral surface 2a of the insertion pipe part 2 is used, the outer peripheral surface 2a of the insertion pipe part 2 is used. The compression deformation of the sealing material 3 in the close contact state with respect to the large diameter side and the elastic deformation of the retaining member 4 in the close contact state with the outer peripheral surface 2a of the insertion tube portion 2 toward the large diameter side are large. In particular, when the sealing material 3 is fused to the outer peripheral surface 2a of the insertion tube portion 2 due to long-term use, a great deal of labor is required to separate the sealing material 3 itself. In addition, since the external force receiving portion 51 of each of the divided dismantling plates 50A is hit with a hammer or the like, the efficiency of driving the divided dismantling plate 50A is low in spite of the labor required. The occurrence of hitting mistakes increases, and the driving efficiency tends to decrease.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and a first problem is that when it becomes necessary to disassemble a pipe joint for maintenance and inspection, replacement of parts, etc. The second main problem is to provide a method for disassembling a pipe joint which can easily and easily release the connection of parts with a small amount of labor from the outside with a small amount of labor. Another object of the present invention is to provide a dismantling jig for a pipe joint which can be easily handled.

[0005]

According to a first aspect of the present invention, there is provided a method for disassembling a pipe joint according to the first aspect of the present invention, wherein the retaining member can be displaced in a disengaged state in the aforementioned configuration. With a thickness, and prepare a plurality of narrow flat plate-shaped disassembly plate with a sharp tip formed, each disassembly plate applied to the outer peripheral surface of the insertion tube portion along the tube axis direction,
A point of insertion and movement between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion and between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion while applying vibration with a vibration device. It is in. According to the above feature configuration, since a plurality of narrow flat plate-shaped disassembly plates whose tips are formed to be sharp are used, even if the sealing material is in close contact with the outer peripheral surface of the insertion tube portion due to long-term use,
Since the force required for peeling off the sealing material is small, and the disassembling plate is inserted and moved while applying vibration to the disassembling plate, the disassembling plate is moved between the inner peripheral surface of the sealing material and the insertion tube portion. It can be smoothly inserted and moved between the outer peripheral surface and between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion. Accordingly, although the number of dismantling plates to be inserted is increased as compared with the conventional dismantling method, the time required for the insertion movement per one piece and the labor required for the insertion movement are reduced. Can be efficiently and easily performed with little labor.

According to a second aspect of the present invention, there is provided a disassembling jig for a pipe joint, wherein the disassembling plate is provided at a position where a base end of the disassembling plate and a vibrating body of a vibrating device are opposed to each other. The present invention is characterized in that an engagement means is provided for detachably engaging with applying vibration. According to the above-mentioned characteristic configuration, by inserting the base end of the dismantling plate and the vibrating body of the vibrating device via the engaging means, the work of inserting the disassembling plate can be performed while the vibrating device is roughly handled. Detachment of the vibrator on the way can be suppressed. Therefore, the operation of inserting the disassembly plate can be performed efficiently with less labor, and the handling during the insertion operation of the disassembly plate can be facilitated.

According to a third aspect of the present invention, there is provided a disassembly jig for a pipe joint, wherein the engagement means is engaged with a base portion of the disassembly plate and a vibrating body of a vibrating device opposed to each other. In the combined state, a swing regulating means for regulating relative swing between the dismantling plate and the vibrator in the width direction of the dismantling plate is provided.
According to the above feature configuration, at the time of inserting the dismantling plate,
When the disassembling plate is pushed while being vibrated by the vibrating body of the vibrating device, the swing restricting means can suppress the disassembling plate from oscillating in the width direction with respect to the vibrating body. Therefore, the straightness when the dismantling plate is pushed in along the tube axis direction can be improved, so that the efficiency of the operation for inserting the dismantling plate can be promoted.

According to a fourth aspect of the present invention, there is provided a disassembly jig for a pipe joint, wherein the tip of the disassembly plate has an inclined surface which intersects at an acute angle with a plate surface in contact with an outer peripheral surface of the insertion tube portion. Is formed. According to the characteristic configuration, the sharp inclined surface formed at the distal end of the disassembly plate allows the gap between the inner peripheral surface of the sealing material in an intimate contact state and the outer peripheral surface of the insertion tube portion,
In addition, it is possible to smoothly insert and move between the inner peripheral surface of the retaining member and the outer peripheral surface of the insertion tube portion, and it is possible to improve the efficiency of inserting the dismantling plate.

A characteristic configuration of the disassembly jig for a pipe joint according to a fifth aspect of the present invention is that a base end of the disassembly plate is bent to a side away from the outer peripheral surface of the insertion tube portion.
According to the above-described characteristic configuration, since the base end of the dismantling plate is bent, damage to the outer peripheral surface of the insertion tube portion during insertion movement of the disassembling plate can be suppressed.

According to a sixth aspect of the present invention, there is provided a disassembly jig for a pipe joint, wherein the engagement means is provided at a position where a base end side of the disassembly plate and a vibrator of a vibrator are opposed to each other. The present invention is characterized in that it is constituted by a formed engaging projection and an engagement recess which can be freely fitted. According to the above feature configuration, at the time of inserting the dismantling plate,
The engagement protrusions and the engagement recesses formed at the opposing portions of the base end of the dismantling plate and the vibrating body of the vibrating device are fitted to each other. Vibration can be reliably applied from the vibrating body to the dismantling plate while the body is prevented from coming off, and an engaging convex portion is provided at a position where the base end side of the dismantling plate and the vibrating body oppose each other. Since it is only necessary to form the engagement recess, the disassembling plate can be inserted efficiently while simplifying the structure and reducing the manufacturing cost.

A feature of the disassembly jig for a pipe joint according to a seventh aspect of the present invention is that a groove for holding a lubricant is formed on each of the front and back surfaces of the disassembly plate. According to the above-mentioned characteristic configuration, the disassembled plate is held between the inner peripheral surface of the sealing material in a close contact state and the outer peripheral surface of the insertion tube portion by the lubricant held in the grooves on the front and back surfaces of the disassembled plate, and when the disassembly plate is removed. It is possible to smoothly insert and move between the inner peripheral surface of the stopper member and the outer peripheral surface of the insertion tube portion, and furthermore, while holding the stopper member in the disengagement release state by the inserted disassembly plate, the both tube portions are Even when the pipes are relatively displaced along the pipe axis direction, there is a lubricant between the inner peripheral surface of the sealing material and the outer surface of the dismantling plate, so the detaching work of both pipe sections can be easily performed with little labor. It can be carried out.

[0012] According to a eighth aspect of the present invention, in the disassembly jig for a pipe joint, the lubricant holding groove is formed so as to be bent toward the base end toward the center in the width direction of the dismantlement plate. On the point. According to the characteristic configuration, the lubricant held in the lubricant holding grooves on the front and back surfaces of the disassembly plate is gradually moved toward the center in the width direction as the disassembly plate is inserted and moved between the two pipe portions. Can be suppressed from flowing out of the dismantling plate in the width direction.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS. 1 to 10
Is a plurality of fluid transport pipes P such as water pipes and gas pipes.
A receiving pipe 1 formed at one end of one fluid transport pipe P to be connected and an insertion pipe 2 formed at the other end of the other fluid transport pipe P are connected to a pipe axis X. This figure shows a pipe joint which is connected in a sealed state from the direction and which is formed at two places on the inner peripheral surface 1a of the receiving pipe part 1 and at a predetermined interval in the pipe axis X direction. Of the annular grooves 1b and 1c, an annular ring made of an elastic material such as rubber for sealing between the outer circumferential surface 2a of the insertion tube portion 2 and the annular groove 1b located on the opening side of the receiving tube portion 1. The sealing material 3 is attached to the outer peripheral surface 2 of the insertion tube 2.
a, a ring-shaped retaining member cut at one location in the circumferential direction into an annular groove 1c located on the inner side of the receiving tube portion 1. 4 and
The function of holding the retaining member 4 at a position where the axis of the retaining member 4 matches or substantially coincides with the tube axis X of the receiving tube portion 1 and the elasticity of the retaining member 4 on the diameter increasing side when the retaining member is released. A centering ring 5 made of an elastic material having a function of allowing deformation is mounted.

The distal end of the outer peripheral surface 2a of the insertion tube portion 2 protrudes radially outward so as to be able to contact the retaining member 4 in the retaining state from the direction of the tube axis X. As shown in FIG. 2, an annular protrusion 6 is formed on the upper side in the insertion movement direction of the annular protrusion 6 as shown in FIG. A cam surface 6a for displacing (elastically deforming) the member 4 toward the diameter-expanding side to the retaining release state against the elastic restoring force of the member 4 and the elastic restoring force of the centering ring 5 arranged on the outer peripheral side thereof is formed. I have.

When the insertion tube 2 is inserted into the receiving tube 1 from the direction of the tube axis X, the sealing material 3 is inserted into the annular groove 1b of the receiving tube 1 with the insertion movement. While being pressed against the inner peripheral surface, it is compressed and deformed toward the enlarged diameter side, and furthermore, the retaining member 4 is brought into the retaining release state against the elastic restoring force of itself and the elastic restoring force of the centering elastic ring 5. When displaced to the diameter increasing side and the protrusion 6 of the insertion tube 2 passes, the retaining member 4 in the retaining release state is reduced in diameter to the retaining state by elastic restoring force.

Therefore, by simply inserting the insertion tube portion 2 into the receiving tube portion 1, not only the two tube portions 1 and 2 can be connected and stopped in a sealed state, but also the differential settlement and earthquake As shown in FIG.
The annular projection 6 of the insertion tube 2 and the retaining member 4 held in the annular groove 1c of the receiving tube 1 come into contact with each other from the tube axis X direction,
The detachment between the receiving tube 1 and the insertion tube 2 can be strongly prevented.

Next, a method of disassembling the pipe joint constructed as described above and a dismantling jig used therein will be described.
First, a plurality of narrow flat plate-like (narrow band-shaped) disassembly plates 7 having a thickness capable of expanding and displacing the retaining member 4 to the retaining release state and having a sharp end is provided. Prepare The disassembly plate 7 is made of a metal such as stainless steel formed in a narrow flat plate shape (for example, length 300 mm, width 10 mm, thickness 3 mm), and is inserted into a tip portion at one end side in the longitudinal direction. An inclined surface 7 that intersects a plate surface (also a back surface) 7b at an acute angle with the outer peripheral surface 2a of the tube portion 2
d is formed, and is an example of a vibrating body of the vibrating device A, which is a striking shaft 10 that applies an axial periodic impact force (vibration) to the dismantling plate 7, In the part opposite to the base end side, which is the other end in the longitudinal direction,
An engagement means B is provided for engaging these two parts 10 and 7 in a detachable manner while applying vibration to the dismantling plate 7. Further, on each of the front and back surfaces 7a and 7b of the dismantling plate 7, a large number of lubricant holding grooves 9 capable of holding a lubricant are bent so as to be deviated toward the base end toward the center in the width direction of the dismantling plate 7. (In this embodiment, V-shaped), and the base end 7e of the dismantling plate 7 is applied to the outer peripheral surface 2a of the insertion tube 2 along the tube axis X direction. The insertion tube portion 2 is formed to be bent at a predetermined angle (in the present embodiment, at an angle range of 90 degrees) in an arc shape on a side away from the outer peripheral surface 2a.

The engaging means B penetrates a bent base end 7e of the dismantling plate 7 to form a round hole-shaped engaging hole (an example of an engaging recess) 8j along the longitudinal direction of the dismantling plate 7 and A cylindrical engaging portion (an example of an engaging projection) 10h is formed at the tip of the hitting shaft 10 so as to be removably fitted into the locking hole 8j of the dismantling plate 7. ing. Further, the engaging portion 10h of the striking shaft 10 is inserted into the locking hole 8j of the bent base end portion 7e.
Can be regulated in the width direction of the dismantling plate 7 and the relative swing between the hitting shaft 10 and the disassembling plate 7. With the portion 10h, when the engaging means B is in the engaged state, the relative swing between the disassembling plate 7 and the striking shaft 10 in the width direction of the dismantling plate 7 with the engagement point substantially as a swing fulcrum. Swing restricting means C for restricting the pressure. The striking shaft 1 is inserted into a locking hole 8j formed in the bending base end portion 7e of the dismantling plate 7.
By fitting the engaging portion 10h at the front end of the disassembling plate 7 from the rear side, vibration (periodic impact force) is applied to the disassembling plate 7 toward the front end thereof, and the bent base end 7e is provided. The engaging portion 10h of the tip of the hitting shaft 10 is fitted into the locking hole 8j of the striking shaft 10 from the front side, so that the dismantling plate 7 vibrates toward its base end (periodic impact force). Is provided. That is, the back surface of the bent base end portion 7e is
A vibration receiving portion (an impact receiving portion or an external force receiving portion) configured to receive the vibration toward the distal end side of the disassembly plate 7 and
The front surface of the bent base end portion 7e is configured as a vibration receiving portion (an impact receiving portion or an external force receiving portion) that receives the vibration toward the base end side of the dismantling plate 7.

Therefore, vibration can be reliably applied to the dismantling plate 7 from the striking shaft 10 while suppressing the disengagement of the striking shaft 10 during the operation of inserting the dismantling plate 7, and furthermore, the disassembling plate 7 can be folded. Since it is only necessary to form the locking hole 8j and the engaging portion 10h at a position where the bending base end portion 7e and the striking shaft 10 face each other, the dismantling plate 7 can be formed while simplifying the structure and reducing the manufacturing cost. Can be efficiently inserted.

Then, the plurality of dismantling plates 7 configured as described above are sequentially applied to a plurality of locations in the circumferential direction of the outer peripheral surface 2a of the insertion tube portion 2 along the pipe axis X direction. The disassembled plate 7 is applied between the inner peripheral surface of the sealing member 3 and the outer peripheral surface 2a of the insertion tube portion 2 while applying vibration (periodic impact force) by the vibrating device A, and inside the retaining member 4. Peripheral surface and insertion tube 2
Is moved between the outer peripheral surface 2a and the outer peripheral surface 2a. As the disassembling plate 7 is inserted and moved, the annular sealing material 3 which is in close contact with or fused to the outer peripheral surface 2a of the insertion tube portion 2 is formed by the sharp inclined surface 7d formed at the distal end of the dismantling plate 7. While being pressed against the inner circumferential surface side of the annular groove 1b of the receiving tube portion 1, it is compressed and deformed to the enlarged diameter side, and is released or peeled off from the outer circumferential surface 2a of the insertion tube portion 2, and the retaining member 4 is removed. It is displaced toward the diameter increasing side to the retaining release state against the elastic restoring force of itself and the elastic restoring force of the centering elastic ring 5, and the retaining release state is maintained. In this state, the receiving tube portion 1 and the insertion tube portion 2 are relatively displaced and moved along the tube axis X direction.
2 is released.

The disassembling plate 7 applied to the outer peripheral surface 2a of the insertion tube portion 2 along the pipe axis X is sealed while applying vibration (periodic impact force) by the vibrating device A. Lumber 3
When the insertion movement is performed between the inner peripheral surface of the insertion tube portion 2 and the outer peripheral surface 2a of the insertion tube portion 2 and between the inner peripheral surface of the retaining member 4 and the outer peripheral surface 2a of the insertion tube portion 2, 7b is strongly pressed against the outer peripheral surface 2a of the insertion tube portion 2. At this time, since the base end portion 7e of the dismantling plate 7 is bent in an arc shape,
Damage to the outer peripheral surface 2a of the insertion tube portion 2 by the dismantling plate 7 can be suppressed.

FIG. 9 shows a portable hitting tool which is an example of the vibrating device A. The hitting shaft 1 is provided in a housing 15.
A spindle 17 provided with a mounting portion 16 for attaching and detaching the first motor 0 and slidably in an axial direction within a certain range;
8, the eccentric rotator 19 fixed to the drive shaft 18a of the electric motor 18 is provided in the spindle 17.
Piston 20 reciprocatingly slides in the axial direction in conjunction with
And a flying piston 21 accelerated by the excitation piston 20, and a striker 22 for applying an impact force generated by a collision with the flying piston 21 to the striking shaft 10. A plurality of narrow flat plate-shaped dismantling plates 7 each having a thickness capable of expanding and displacing the retaining member 4 to a retaining released state, and having a sharpened tip; 2 while applying vibration to the disassembly plate 7 applied along the pipe axis X direction to the outer peripheral surface 2a of the insertion pipe 2 between the inner peripheral surface of the sealing material 3 and the outer peripheral surface 2a of the insertion tube portion 2. A disassembling jig for a pipe joint is constructed by inserting and moving between the inner peripheral surface of the retaining member 4 and the outer peripheral surface 2a of the insertion tube portion 2 and the vibrating device A.

[Second Embodiment] FIG. 11 shows another embodiment of a disassembly jig for a pipe joint, which comprises a striking shaft 10 of a vibrating device A and a base end side of a disassembly plate 7 opposed to each other. And an engaging means B for detachably engaging the two members 10 and 7 in a state where vibration is applied to the disassembly plate 7.
A pin-shaped engagement receiver fixed to the base end side surface of the disassembly plate 7 in a state where it can receive vibration (periodic impact force) toward the distal end side and vibration toward the base end side of the disassembly plate 7 And a semicircular engaging portion 10a formed at the tip of the striking shaft 10 so as to be detachable from the engagement receiving portion 8a of the disassembling plate 7; The base end portion 7e of the plate 7 is bent in an arc shape on a side away from the outer peripheral surface 2a of the insertion tube portion 2. The other configuration is the same as the configuration described in the first embodiment, and a description thereof will not be repeated.

[Third Embodiment] FIG. 12 shows another embodiment of a dismantling jig for a pipe joint, which comprises a striking shaft 10 of a vibrating device A and a base end side of a dismantling plate 7 opposed to each other. And an engaging means B for detachably engaging the two members 10 and 7 in a state where vibration is applied to the disassembly plate 7.
Is formed by bending the base end of the disassembly plate 7 into an inverted U-shape so that it can receive vibration toward the distal end side (periodic impact force) and vibration toward the base end side of the disassembly plate 7. Part 8b;
The U-shaped engaging portion 1 formed at the tip of the striking shaft 10 so as to be able to be fitted to the curved protruding portion 8b of the dismantling plate 7.
0b, and a base end 7e of the dismantling plate 7
Is bent in an arc shape on the side of the insertion tube portion 2 that is separated from the outer peripheral surface 2a. The other configuration is the same as the configuration described in the first embodiment, and a description thereof will not be repeated.

[Fourth Embodiment] FIG. 13 shows another embodiment of a disassembly jig for a pipe joint. The disassembly jig for a pipe joint is opposed to the striking shaft 10 of the vibrating device A and the base end side of the disassembly plate 7. The engaging means B for detachably engaging the two members 10 and 7 in a state where vibration is applied to the disassembling plate 7 at a portion where the disassembling plate 7 is to be vibrated. A swing regulating means C for regulating relative swing between the dismantling plate 7 and the striking shaft 10 in the width direction of the dismantling plate 7 serving as a swing fulcrum is provided.
The base end portion 7e is bent in an arc shape on the side away from the outer peripheral surface 2a of the insertion tube portion 2. The engagement means B includes:
A pin-shaped projection 8c for receiving vibration (periodic impact force) toward the distal end and vibration toward the proximal end of the disassembly plate 7 is fixed to the surface on the proximal end side of the disassembly plate 7, A notch groove 8d is formed in each side of the side of 8c, and the front end of the hitting shaft 10 is removably fitted to the pin-shaped protrusion 8c of the dismantling plate 7. Engagement hole 10c
And an engaging projection 10d that fits into both locking grooves 8d of the disassembly plate 7 from the plate thickness direction. The swing restricting means C includes a pair of locking grooves 8d on the disassembling plate 7 constituting the engaging means B and a pair of engaging projections 1 on the striking shaft 10 side.
0d. The other configuration is the same as the configuration described in the first embodiment, and a description thereof will not be repeated.

[Fifth Embodiment] FIG. 14 shows another embodiment of a disassembly jig for a pipe joint. The disassembly jig for the pipe joint is opposed to the striking shaft 10 of the vibrating device A and the base end side of the disassembly plate 7. The engaging means B for detachably engaging the two members 10 and 7 in a state where vibration is applied to the disassembling plate 7 at a portion where the disassembling plate 7 is to be vibrated. A swing regulating means C for regulating relative swing between the dismantling plate 7 and the striking shaft 10 in the width direction of the dismantling plate 7 serving as a swing fulcrum is provided.
The base end 7e is bent in an arc at an angle of 90 degrees to the side away from the outer peripheral surface 2a of the insertion tube portion 2. The engagement means B is provided on the surface of the base end portion of the dismantling plate 7 with a projecting force capable of receiving the exciting force (periodic impact force) to the distal end side of the disassembling plate 7 and the exciting force to the base end side. A ridge 8e is formed by punching out along the longitudinal direction of the dismantling plate 7, and a locking groove 8f is formed in each of both sides of the ridge 8e. An engagement groove 10e which engages with the protrusion 8e of the disassembly plate 7 in an externally fitted state so as to be detachable;
An engaging projection 10f that fits into both locking grooves 8f of the disassembly plate 7 is formed. The swing restricting means C includes a projection 8e and a pair of locking grooves 8f on the side of the dismantling plate 7 constituting the engaging means B, an engaging groove 10e and a pair of engaging projections 10f on the striking shaft 10. Is also used. The other configuration is the same as the configuration described in the first embodiment, and a description thereof will not be repeated.

[Sixth Embodiment] FIG. 15 shows another embodiment of a dismantling jig for a pipe joint, in which a striking shaft 10 of a vibrating device A and a base end side of a dismantling plate 7 are opposed to each other. At the part to be disassembled, an engaging means B for detachably engaging the two pieces 10 and 7 in a state where vibration is applied to the disassembly plate 7 is provided, and the base end portion 7e of the disassembly plate 7 is attached to the outer periphery of the insertion tube part 2. It is bent in an arc at an angle of 90 degrees to the side away from the surface 2a. The engagement means B is provided at the base end of the dismantling plate 7 with a circular locking hole (engagement) for receiving vibration (periodic impact force) toward the distal end of the dismantling plate 7 and vibration toward the base end. An example of a concave portion 8g or a square locking hole (an example of an engaging concave portion) 8h is formed so as to penetrate therethrough, and a round locking hole 8g or a square A pin-shaped engaging portion (an example of an engaging convex portion) 10g is formed so as to be removably fitted to the stop hole 8h. The other configuration is the same as the configuration described in the first embodiment, and a description thereof will not be repeated.

[Seventh Embodiment] FIG. 16 shows another embodiment of a dismantling jig for a pipe joint, which comprises a striking shaft 10 of a vibration device A and a base end side of a dismantling plate 7 facing each other. An engaging means B for detachably engaging the two members 10 and 7 in a state where vibration is applied to the disassembly plate 7 is provided at a portion where the disassembly plate 7 is vibrated. Also, the dismantling plate 7
A twisted portion 7A is formed at a position deviated to the base end side in the longitudinal direction so that the phase is different by 90 degrees between the tip end side and the base end side. 2 is applied to the outer peripheral surface 2a along the pipe axis X direction.
The disassembly plate portion 7B closer to the distal end than the disassembly plate portion 7B is closer to the tangential direction of the insertion tube portion 2 and the disassembly plate portion 7C closer to the proximal end than the torsion portion 7A is the tube of the insertion tube portion 2. It is configured to be in a vertical orientation along a virtual plane (diameter direction) passing through the axis X. The engaging means B includes a dismantling plate 7.
Of both sides of the base end side dismantling plate portion 7C of the insertion tube portion 2
When applied to the outer peripheral surface 2a along the pipe axis X direction,
A concave engagement receiving portion 8 is cut out on one side located radially outward, and a tip of the hitting shaft 10 is engageable with the concave engagement receiving portion 8. A semicircular engaging portion 10a is formed by notching. Then, the engaging portion 10a of the tip of the hitting shaft 10 is pressed against the tip end corner in the concave engagement receiving portion 8, thereby causing the dismantling plate 7 to vibrate toward its tip ( (Periodic impact force) is applied, and the engaging portion 10a at the distal end of the striking shaft 10 is pressed against the base end corner in the engagement receiving portion 8 so that Is configured to apply vibration (periodic impact force) to the base end side.

Further, a torsion portion 7A formed on the dismantling plate 7
As a result, both sides of the base end side disassembly plate portion 7C protrude beyond the front and back surfaces 7a, 7b of the disassembly plate portion 7B on the distal end side, so that the outer peripheral surface 2a of the insertion tube portion 2 extends along the pipe axis X direction. When it is applied, the dismantling plate 7 as a whole is in an inclined posture, and its sharp tip comes into contact with the outer peripheral surface of the insertion tube portion 2. That is, the insertion tube portion 2 is provided with the torsion portion 7A.
A forced contact means for forcibly contacting the sharp distal end of the dismantling plate 7 with the outer peripheral surface of the insertion tube portion 2 when the outer peripheral surface of the insertion tube 2 is applied along the pipe axis X direction. Since the other configuration is the same as the configuration described in the first embodiment,
The description thereof is omitted.

Eighth Embodiment FIG. 17 shows another embodiment of a dismantling jig for a pipe joint. Outer peripheral surface 2
a inclined surface 7d intersecting at an acute angle with a plate surface (which is also the back surface) 7b that contacts the a.
It is formed in a tapered shape that becomes narrower toward the tip. Therefore, the distal end portion of the dismantling plate 7 is formed in a sharpened shape having a smaller thickness and a smaller width toward the distal end side. Therefore, even when the seal material 3 is hardened with long-term use, the inside of the seal material 3 is hardened. It is possible to smoothly insert and move between the peripheral surface and the outer peripheral surface 2a of the insertion tube portion 2 with a small amount of labor. For other configurations,
Since the configuration is the same as that described in the first embodiment, description thereof will be omitted.

[Other Embodiments] (1) In each of the above embodiments, the vibrating device A is
Although an example using the electric motor 18 as a drive source has been described, the present invention may be implemented using a device using compressed air as a drive source. In short, any structure can be used as the vibration device A as long as it can apply vibration (periodic impact force in the axial direction) to the vibration body (hitting shaft). Good. (2) In each of the above-described embodiments, a large number of lubricant holding grooves 9 for holding the lubricant are formed on each of the front and back surfaces 7a and 7b of the dismantling plate 7, but at least the inner peripheral surface 1a of the receiving tube portion 1 is formed. It is sufficient that the lubricant holding groove 9 is formed on the surface 7a of the dismantling plate 7 opposed to the above. (3) In each of the above-described embodiments, a large number of lubricant holding grooves 9 of the dismantling plate 7 are shifted toward the base end toward the center in the width direction.
The lubricant holding groove 9 may be formed in a straight line along the width direction, or may be formed in an X shape, a W shape, or the like. (4) In each of the above-described embodiments, the receiving pipe section 1 formed on one end side of one fluid transport pipe P to be connected and the other end section side of the other fluid transport pipe P are formed. The pipe joint for connecting the insertion pipe part 2 to the insertion pipe part 2 in a sealed state from the pipe axis X direction in a sealed state has been described as an example, but the pipe joint fitting and connecting the fluid transport pipe P and the connection pipe part of the on-off valve is used. It may be a pipe joint for fitting and connecting pipe sections of another fluid device. (5) In each of the embodiments described above, the retaining member 4 is held on the outer peripheral side of the retaining member 4 at a position where its axis matches or substantially coincides with the tube axis X of the receiving tube portion 1. Ring 5 made of an elastic material having a function of allowing the retaining member 4 to be elastically deformed toward the diameter increasing side when the retaining member 4 is released.
Is mounted, but the centering ring 5 may be omitted. Further, in each of the above-described embodiments, the retaining member 4 is formed in a substantially ring shape in which one portion in the circumferential direction is cut, but the retaining member 4 is divided into a plurality in the circumferential direction, and The split retaining member 4 is moved from the retaining state in which it comes into contact with the projection 6 on the distal end side of the outer peripheral surface of the insertion tube portion 2 inserted into the position passing through the sealing material 3 from the tube axis X direction. It may be configured to be displaceable toward the enlarged diameter side against the elastic restoring force in a retaining release state in which the passage of the portion 6 is permitted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention immediately before connection of both pipe portions.

FIG. 2 is a vertical cross-sectional view of the connecting part in the middle of connection.

FIG. 3 is a longitudinal sectional view when connection of both pipe parts is completed.

FIG. 4 is a longitudinal sectional view when a tensile force acts on both pipe parts.

FIG. 5 is a vertical cross-sectional view of the disassembly plate during insertion.

FIG. 6 is a vertical cross-sectional view when the disassembly plate has been inserted.

FIG. 7 is a vertical cross-sectional view of the two pipe sections during the separation movement.

FIG. 8 is a vertical cross-sectional view when the separation of both pipe parts is completed.

FIG. 9 is a schematic partially cutaway view of a vibration device.

FIG. 10 is a perspective view of a dismantling plate and a part of a hitting shaft.

FIG. 11 is a perspective view of a main part of a disassembly jig showing a second embodiment of the present invention.

FIG. 12 is a perspective view of a main part of a disassembly jig showing a third embodiment of the present invention.

FIG. 13 is a perspective view of a main part of a dismantling jig showing a fourth embodiment of the present invention.

FIG. 14 is a perspective view of a main part of a dismantling jig showing a fifth embodiment of the present invention.

FIG. 15 is a perspective view of a main part of a dismantling jig showing a sixth embodiment of the present invention.

FIG. 16 is a perspective view of a main part of a dismantling jig showing a seventh embodiment of the present invention.

FIG. 17 is a perspective view of a main part of a dismantling plate showing an eighth embodiment of the present invention.

FIG. 18 is a longitudinal sectional view showing a conventional pipe joint disassembly method.

FIG. 19 is a cross sectional view showing a conventional pipe joint disassembly method.

[Explanation of symbols]

 Reference Signs List A Exciting device B Engaging means C Swing regulating means X Pipe shaft 1 Inlet pipe section 1a Inner peripheral surface 1b Annular groove 1c Annular groove 2 Insertion pipe section 2a Outer peripheral surface 3 Seal material 4 Detachment member 6 Projection 7 Dismantling plate 8 Engagement receiving part 9 Lubricant holding groove 10 Exciting body (hitting shaft)

Claims (8)

[Claims] An annular seal member compressed between an inner peripheral surface of a receiving tube portion and an outer peripheral surface of an insertion tube portion inserted therein;
A stopper release state in which the protrusion is allowed to pass through the protrusion from the stopper state in which the protrusion comes into contact with the protrusion on the outer peripheral surface front end side of the insertion tube part inserted to the position passing through the sealing material from the tube axis direction. A method of disassembling a pipe joint in which both pipe parts are connected in a sealed state so as to be retained in a sealed state via a retaining member capable of being displaced to the diameter-expanding side against the elastic restoring force. A plurality of narrow flat plate-shaped dismantling plates having a thickness capable of expanding and displacing in a retaining release state and having a sharp tip are prepared, and a pipe shaft core is provided on the outer peripheral surface of the insertion tube portion. Each disassembled plate applied along the direction is inserted between the inner peripheral surface of the sealing material and the outer peripheral surface of the insertion tube portion and the inner peripheral surface of the retaining member while applying vibration with a vibration device. A disassembly method for a pipe joint which is inserted and moved between the outer peripheral surface of a pipe portion and the outer peripheral surface. 2. A disassembly jig used in the disassembly method of a pipe joint according to claim 1, wherein a base end side of the disassembly plate and a vibrator of a vibrator are opposed to each other. A dismantling jig for a pipe joint provided with an engagement means for detachably engaging both of them while applying vibration to the dismantling plate. 3. The disassembly in the width direction of the disassembly plate at a position where a base end portion of the disassembly plate is opposed to a vibrator of the vibration device when the engagement unit is in an engaged state. 3. The dismantling jig for a pipe joint according to claim 2, further comprising a swing regulating means for regulating relative swing between the plate and the vibrating body. 4. The pipe joint according to claim 2, wherein an inclined surface which intersects at an acute angle with a plate surface in contact with an outer peripheral surface of said insertion tube portion is formed at a tip portion of said dismantling plate. Demolition jig. 5. The disassembly jig for a pipe joint according to claim 2, wherein a base end portion of the disassembly plate is bent to a side away from an outer peripheral surface of the insertion tube portion. . 6. An engaging projection and an engagement recess formed on the base end side of the disassembly plate and a vibrating body of a vibrating device, the engaging means being formed opposite to each other. The disassembly jig for a pipe joint according to any one of claims 2 to 5, wherein the jig is configured by: 7. The dismantling jig for a pipe joint according to claim 2, wherein a groove for holding a lubricant is formed on each of the front and back surfaces of the dismantling plate. 8. The disassembly jig for a pipe joint according to claim 7, wherein the lubricant holding groove is formed so as to be deflected toward the base end toward the center in the width direction of the disassembly plate.