JP4057310B2 - Release pulling jig for pipe joint and release pulling method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint releasing / extracting jig and an extracting / extracting method for releasing a pipe connected to the joint main body in a locked state by being inserted into the joint main body.
[0002]
[Prior art]
In recent years, resin piping materials such as cross-linked polyethylene pipes and polybutene pipes are widely used as water supply and hot water supply pipes for houses. For these pipe joints for resin piping, a method is adopted in which pipes are connected by fastening cap nuts to a joint body made of brass. If constructed correctly, it is an excellent fitting without accidents such as water leakage, but water leakage may occur due to excessive or insufficient tightening of cap nuts.
[0003]
In addition, connecting and removing pipes in a narrow work space has a problem in that workability is poor and construction time is required. In order to solve such problems, pipe joints that can be easily connected in a short time without depending on the skill of field workers have been studied. The pipe joint has a structure in which the connection of the pipe is completed simply by inserting the end of the pipe into the joint body.
[0004]
FIG. 7 shows a conventional water-stop type one-touch joint, and a joint body 1 is provided with a lumen 2 penetrating in the axial direction thereof. A pipe insertion portion 3 having a diameter larger than that of the lumen 2 is provided at the front end portion of the joint body 1, and a recessed portion 4 having a larger diameter is further provided on the outside thereof.
[0005]
A water stop member 5 made of an O-ring is housed in the back of the recessed portion 4, and a C-ring-like locking member 8 having a plurality of locking claws 7 is inserted on the outside of the water-stopping member 5. . The locking member 8 is attached to the joint body 1 by a lid member 9 screwed and fixed to the joint body 1. A sleeve member 11 is inserted in advance at the end of the tube 10.
[0006]
In the one-touch joint configured in this way, the outer peripheral surface of the pipe 10 is sealed by the water blocking member 5 by inserting the sleeve member 11 inserted into the end of the pipe 10 into the pipe insertion portion 3, and the outer peripheral surface of the pipe 10. Thus, the locking claw 7 of the locking member 8 is locked. Therefore, the pipe 10 can be connected only by being inserted and inserted into the joint body 1, and the outer peripheral surface of the pipe 10 is sealed by the water blocking member 5, and the pipe 10 can be prevented from coming off by the locking claw 7.
[0007]
[Problems to be solved by the invention]
However, according to the pipe joint described above, the connection can be completed in a short time without requiring special skill, but once the pipe 10 is connected to the joint body 1, it cannot be removed. It was necessary to replace the joint body 1 as well. In actual construction sites, pipes are often mistakenly connected to the joint body 1, and the reworking operation is a very uneconomical method of replacing the joint body 1 together.
[0008]
Therefore, as shown in FIG. 8, a plurality of claws 13 are provided on a substantially C-shaped release jig 12 having a cut at a part of the circumference, and the grooves 7 a provided on the inner circumference of the lid member 9. Pipe joints have been developed that can increase the diameter of the locking member 8 inside the joint body 1 and release the connection of the pipe 10 by being inserted into the joint body 1.
[0009]
Japanese Patent Laid-Open No. 10-281374 is known as an integrated pipe joint and release jig. This pipe joint does not particularly require a jig and can be easily attached / detached. However, since the pipe can be attached / detached without cutting, the pipe 10 with a scratch on the locking member in violation of the manual. May be reused as it is, and there is a problem that the sealing performance due to scars is lowered.
[0010]
The present invention has been made paying attention to the above circumstances, and the object thereof is to be able to remove the pipe from the joint body even if the pipe is mistakenly connected to the joint body. It is an object of the present invention to provide a release pulling jig and a release pulling method for a pipe joint that can prevent a pipe with a mark from being reused.
[0011]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a pipe main body having a pipe insertion portion and a locking member, and the pipe is inserted into the pipe insertion portion of the joint main body so that the pipe is locked. In a pipe joint release pulling jig for releasing a pipe joint that is locked to a member and releasing the locked state between the pipe and the locking member and pulling out the pipe from the joint main body, the release pulling jig is the joint main body. The pipe connected to the pipe is cut into a predetermined length, fitted from the end of the cut pipe , inserted between the pipe and the locking member, the diameter of the locking member is increased, and the pipe An annular release jig for releasing the locking state of the pipe, and a pulling jig for inserting the pipe into the pipe from the cut end of the pipe and engaging with the end face of the pipe connected to the joint body, and pulling out the pipe It is characterized by comprising a tool.
[0012]
A second aspect of the invention is characterized in that the release jig of the first aspect has a claw for expanding the diameter of the locking member on one end side thereof .
[0013]
According to a third aspect of the present invention, the drawing jig according to the first aspect has a release jig storage portion for storing the release jig when the release jig is not used .
[0014]
According to a fourth aspect of the present invention, the drawing jig according to the third aspect has a handle, and the release jig storage portion is provided in the handle .
[0015]
According to a fifth aspect of the present invention, the drawing jig according to the third aspect has a handle, and a fitting portion is provided on the handle so that the cylindrical portion including the claw portion of the release jig is closely fitted. Features .
Claim 6 provides the pipe of the pipe joint in which the pipe is locked to the locking member by providing the pipe main body with a pipe insertion part and a locking member, and inserting the pipe into the pipe insertion part of the joint main body. In the release pulling method of the pipe joint in which the locking state with the locking member is released and the pipe is pulled out from the joint body, the pipe is cut to a predetermined length, and the annular release pulling jig is used as the cut pipe And is inserted between the pipe and the locking member to expand the diameter of the locking member to release the locked state with the pipe, and from the cut end of the pipe into the pipe A drawing jig is inserted and locked to an end face of the pipe connected to the joint body, and the pipe is pulled out.
[0016]
According to claim, disconnect the connected pipe to the joint body, by inserting between the tube and the locking member to release jig from the outside of the joint body, and the tube engaging member is diametrically enlarged The locked state of is released. In this state, the pipe end portion remaining from the joint body can be pulled out of the pipe. The pulled pipe is discarded because the scar of the locking member remains, and can be connected in an airtight state by inserting the end of the remaining pipe into the joint body.
Furthermore, since the release jig cannot be inserted unless the connected pipe is cut off, a pipe with no flaws is always inserted in the case of reconnection, which causes a decrease in joint performance. Can be eliminated. Further, it is possible to prevent deformation of the pawl release jig during lifting Chi carrying and handling.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
(First embodiment)
FIG. 1 is an exploded view of a release / drawing jig, (a) is a side view of the extraction jig partially cut away, (b) is a half-longitudinal side view of the release jig, and (c) is a front view of the same. 2 is a partially cutaway side view of the state where the release jig and the extraction jig are integrally coupled.
[0021]
As shown in FIGS. 1 and 2, the release drawing jig of the present invention is composed of a release jig 21 and a drawing jig 22. The release jig 21 is an annular jig body 23 having an inner diameter that can be fitted to the tube 10, and a male screw portion 24 is provided on the outer peripheral surface at one end in the axial direction. A plurality of claws 25 are provided on the one end portion of the jig body 23 so as to protrude in the axial direction at equal intervals in the circumferential direction. These claws 25 are thin and formed in an arc shape along the curvature of the groove 7a of the pipe joint lid member 9 described later.
[0022]
The pulling jig 22 is rod-shaped, and a hooking portion 26 protruding at a right angle with respect to the axial direction is integrally provided at the tip thereof. A conical handle 27 is integrally provided at the base end portion of the drawing jig 22. At the base end portion of the handle 27, a release jig storage portion 28 formed of a recessed portion is provided. The release jig storage portion 28 has a female screw portion 29 that is screwed with the male screw portion 24 of the jig main body 23, and has a concave portion 30 that stores a claw 25 protruding from the jig main body 23 at the back thereof. ing.
[0023]
Accordingly, when the release jig 21 is not used, the claw 25 of the jig body 23 is housed in the recess 30 of the release jig housing portion 28, and the male screw portion 24 is screwed into the female screw portion 29, thereby releasing the jig 21. And the extraction jig 22 can be integrated. Moreover, since the release jig 21 and the extraction jig 22 are integrated, the claw 25 of the release jig 21 is stored in the release jig storage section 28. It is possible to prevent the material from being deformed due to interference with the member or from being damaged.
[0024]
The material of the release jig 21 is not particularly limited as long as it does not damage the locking member 8, but damages the locking member 8 without damaging the outer surface of the tube 10 inserted into the joint body 1. In order to expand the diameter of the joint body 1 and to facilitate insertion into the joint body 1, a material having moderate flexibility such as resin is preferable to metal, for example, vinyl chloride, nylon, polyethylene, A molded article such as polypropylene is convenient. Therefore, as described above, it is important to provide the release jig storage portion 28 by protecting the claw 25.
[0025]
Next, based on FIG.3 and FIG.4, the connection procedure of a pipe joint and the method of extracting a pipe | tube using the cancellation | release drawing jig comprised as mentioned above are demonstrated. 3 and 4, the joint body and the pipe have the same configuration as the conventional example shown in FIG.
[0026]
As shown in FIG. 3A, a cylindrical sleeve 11 is inserted into the end of the pipe 10 connected to the joint body 1, the flatness of the pipe 10 is corrected, and the outer diameter is restricted to a circle. When the tube 10 in which the sleeve 11 is inserted is inserted into the joint body 1 in the arrow direction A in FIG. 3A, the tube 10 is connected to the tube insertion portion 3 of the joint body 1 as shown in FIG. The
[0027]
By inserting the tube 10 into the tube insertion portion 3, the outer peripheral surface of the tube 10 is sealed by the water blocking member 5, and the locking claw 7 of the locking member 8 is locked to the outer peripheral surface of the tube 10. Therefore, the pipe 10 can be connected only by being inserted into the joint body 1 and inserted. The outer peripheral surface of the tube 10 is sealed by the water-stop member 5, and the tube 10 can be prevented from coming off by the locking claw 7.
[0028]
By the way, when the pipe 10 is mistakenly connected to the joint body 1 at the construction site, an operation for reconnecting the pipe 10 is required. At this time, in this embodiment, as shown in FIG.3 (c), the pipe | tube 10 is cut | disconnected by the pipe cutter in the vicinity of the coupling main body 1. FIG. Then, as shown in FIG. 3E, an annular release jig 21 can be fitted to the tube 10.
[0029]
Then, as shown in FIG. 3 (e), when the release jig 21 is fitted to the tube 10 and is slid in the direction of the joint body 1, the claw 25 is interposed between the tube 10 and the locking member 8. Inserted, the diameter of the locking member 8 is expanded. Therefore, the locking state of the locking claw 7 with respect to the outer peripheral surface of the tube 10 is released.
[0030]
Next, as shown in FIG. 4 (a), the distal end portion of the extraction jig 22 is inserted from the outside of the joint body 1 into the tube 10, actually into the sleeve 11, and the hook portion 26 is inserted into the sleeve 11. It is locked to the end face. In this state, when the pulling jig 22 is pulled to the outside of the joint body 1 by holding the handle 27 of the pulling jig 22, the tube 10 into which the sleeve 11 is inserted becomes the joint body as shown in FIG. Pulled out from 1.
[0031]
The tube 10 with the sleeve 11 pulled out from the joint main body 1 is discarded because the scar remains on the outer peripheral surface due to the locking with the locking member 8, but the sleeve 11 can be reused. Therefore, as shown in FIG. 4C, the leading end portion of the pulling jig 22 is inserted from the opposite side of the sleeve 11, and the hooking portion 26 is locked to the end surface of the sleeve 11 and pulled out from the tube 10. it can. At this time, if the sleeve 11 previously inserted into the tube 10 is forcibly pulled out using radio pliers, a screwdriver or the like, the sleeve 11 is damaged, causing breakage or water leakage, and lowering the sealing performance of the pipe joint. However, by using the drawing jig 22, it is possible to eliminate a factor that degrades the performance of the pipe joint.
[0032]
Then, the sleeve 11 is inserted into the end of the pipe 10 left after cutting, and the pipe 10 is inserted into the pipe insertion portion 3 of the joint body 1 by the procedure shown in FIGS. A portion having no scar can be connected to the outer peripheral surface.
[0033]
Thus, by forming the release jig 21 in an annular shape, the pipe 10 once connected is cut off, and the release jig 10 cannot be inserted unless the end portion is formed. Therefore, in the case of reconnection, the pipe 10 without a flaw is always inserted, and a factor that degrades the performance of the pipe joint can be eliminated.
[0034]
(Second Embodiment)
5 and 6 show the release / drawing jig, FIG. 5 (a) is a side view of the drawing jig, (b) is a half-longitudinal side view of the releasing jig, (c) is a front view, and FIG. a) is a partially cutaway side view in which the release jig and the extraction jig are disassembled, and (b) is a partially cutaway side view in a state where the release jig and the extraction jig are integrally coupled.
[0035]
As shown in FIGS. 5 and 6, the release drawing jig of the present embodiment includes a release jig 31 and a drawing jig 32. The release jig 31 is an annular jig body 33 having an inner diameter that can be fitted to the tube 10, and is provided with a recessed portion 34 at one end surface in the axial direction, and a female screw portion 34 a is provided on the inner peripheral surface thereof. ing. A plurality of claws 35 are provided at one end of the jig body 33 so as to protrude in the axial direction at equal intervals in the circumferential direction. These claws 35 are thin and are formed in an arc shape along the curvature of the inner peripheral surface of the jig body 21.
[0036]
The pulling jig 32 is rod-shaped, and a hooking portion 36 that protrudes at a right angle to the axial direction is integrally provided at the tip of the pulling jig 32. A substantially cylindrical handle 37 is integrally provided at the base end portion of the drawing jig 32. The handle 37 is provided with a large-diameter cylindrical portion 38 that can be engaged with the recessed portion 34 of the release jig 31, and a male screw portion 38 a is provided on the outer peripheral surface of the large-diameter cylindrical portion 38. On the side adjacent to the large-diameter cylindrical portion 38, a small-diameter cylindrical portion 39 that is closely fitted to the inner diameter of the release jig 31 is provided.
[0037]
Therefore, when the release jig 31 is not used, the release jig 31 is fitted to the extraction jig 32 from the distal end side of the extraction jig 32, and the female thread portion 34 a of the release jig 31 is connected to the male thread portion of the extraction jig 32. The release jig 31 and the extraction jig 32 can be integrated with each other by screwing to 38a. In addition, by integrating the release jig 31 and the extraction jig 32, the claw 35 of the release jig 31 comes into close contact with the small-diameter cylindrical portion 39 of the extraction jig 32. Accordingly, it is possible to prevent the claw 35 from interfering with other members to be deformed or damaged when the release pulling jig is carried or handled.
[0038]
Thus, since the release drawing jig is used as a set in a series of operations from connection release to reconnection of the pipe 10 from the joint body 1, it is preferable to integrate them. When integrating, it is desirable to integrate so as to protect the claw 35 of the release jig 31. This is because the claw 35 is inserted into a narrow space inside the joint body 31 as described above, and thus cannot be used if it is damaged or deformed when the jig is carried.
[0039]
In the above-described embodiment, a hooking portion that protrudes to one side at a right angle to the axis is provided at the tip of the extraction jig. However, the tip of the extraction jig protrudes in an umbrella shape coaxially with the axis. A hooking portion may be provided.
[0040]
【The invention's effect】
As described above, according to the present invention, in a pipe joint in which a pipe is locked and connected to a locking member of the joint main body, the release and reconnection of the pipe erroneously connected to the joint main body can be performed with excellent workability. Can be done easily.
[0041]
Also, according to the release pulling method, the pipe once connected is cut off and the end is formed, and then the pipe is pulled out. Factors that degrade performance can be eliminated.
[Brief description of the drawings]
FIG. 1 is an exploded view of a release pulling jig according to a first embodiment of the present invention, in which FIG. 1 (a) is a side view with a part of the pulling jig cut out, and FIG. (C) is also a front view.
FIG. 2 is a partially cutaway side view showing the embodiment, in a state where a release jig and a drawing jig are integrally coupled.
FIG. 3 shows the same embodiment, and (a) to (e) are half-vertical side views for explaining the operation.
FIG. 4 shows the same embodiment, and (a) to (c) are semi-vertical side views for explaining the operation.
FIGS. 5A and 5B are exploded views of a release drawing jig according to a second embodiment of the present invention, in which FIG. 5A is a partially cutaway side view of the drawing jig, and FIG. (C) is also a front view.
6A and 6B show the same embodiment, in which FIG. 6A is a partially cutaway side view of a state in which the release jig and the extraction jig are disassembled, and FIG. The side view partly cut away in the combined state.
FIGS. 7A and 7B show a conventional one-touch joint, wherein FIG. 7A is a half longitudinal side view of the joint body, FIG. 7B is a front view thereof, and FIG. 7C is a half longitudinal side view of the pipe;
8A and 8B show a conventional one-touch joint, in which FIG. 8A is a side view of a half of a release jig, and FIG. 8B is a front view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Joint main body 3 ... Pipe insertion part 8 ... Locking member 10 ... Pipe 11 ... Sleeve 21 ... Release jig 22 ... Extraction jig 25 ... Claw

Claims (6)

A pipe insertion part and a locking member are provided in the joint body, and the pipe and the locking member of the pipe joint in which the pipe is locked to the locking member by inserting the pipe into the pipe insertion part of the joint body. In the release pulling jig of the pipe joint that releases the locking state and pulls the pipe from the joint body,
The release pulling jig cuts the pipe connected to the joint body into a predetermined length, fits from an end of the cut pipe, and inserts it between the pipe and the locking member. An annular release jig that expands the locking member to release the locking state with the pipe;
A pipe joint release pulling device, comprising: a drawing jig that is inserted into a pipe from an end portion of the cut pipe and is engaged with an end face of the pipe connected to the joint main body to pull out the pipe. jig. The release pulling jig for a pipe joint according to claim 1 , wherein the releasing jig has a claw for expanding the diameter of the locking member on one end side thereof . 2. The release pulling jig for a pipe joint according to claim 1 , wherein the pulling jig has a release jig storage portion for storing the release jig when the release jig is not used . 4. The pipe joint release pull-out jig according to claim 3 , wherein the pull-out jig has a handle, and the handle is provided with the release jig storage portion . 4. The tube according to claim 3 , wherein the pulling jig has a handle, and a fitting portion on which a cylindrical portion including a claw portion of the release jig is closely fitted is provided on the handle. Fitting release pulling jig. A pipe insertion part and a locking member are provided in the joint body, and the pipe and the locking member of the pipe joint in which the pipe is locked to the locking member by inserting the pipe into the pipe insertion part of the joint body. In the release pulling method of the pipe joint in which the locked state is released and the pipe is pulled out from the joint body,
The tube is cut to a predetermined length, and an annular release pulling jig is fitted from the end of the cut tube and inserted between the tube and the locking member to insert the locking member. Increase the diameter to release the locked state with the pipe,
A method of releasing a pipe joint, comprising: inserting a drawing jig into the pipe from the cut end of the pipe, engaging with the end face of the pipe connected to the joint body, and pulling out the pipe.

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