JP2007139139A - Pipe joint and move method of movable body in pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint capable of surely confirming insertion and connection of a pipe to the pipe joint completely and a confirmation method of the pipe insertion to the pipe joint. <P>SOLUTION: The pipe joint is equipped with the pipe joint bodies 10, 20, 30, the movable body 40 contained in the pipe joint bodies which is movable around a pipe axial direction, the pipe joint with an elastic body 70 which holds a movable body selectively to the position of the first circumferential direction and the second circumferential direction around the pipe axial direction in the pipe joint body. While stopping the movable bodies to the position of the first circumferential direction by stopping the elastic body to the first pipe shaft direction, the movable body is moved to the position of the second circumference direction through the elastic restoring force of the elastic body by making the elastic body move to the second pipe shaft direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe joint for connecting pipes, for example, and a moving method of a moving body in the pipe joint.

  For example, in order to allow cooking, washing, bathing and the like at home, water pipes are stretched around the house, and many pipe joints are used to connect these pipes. Since these pipes and pipe joints are arranged under the floor of the house, inside the wall, and behind the ceiling, a serious situation arises if water leaks from the pipe connection part of the pipe joint. Therefore, the pipe joint is generally provided with a double seal.

  On the other hand, if the pipe is not sufficiently connected to the pipe joint when the pipe is disposed, a problem of water leakage occurs even though such a double seal is provided. Therefore, as a preventive measure, there is a method of confirming that the piping has been completely inserted into the fitting while observing that the marking lines and seals are gradually aligned as the piping is inserted into the fitting. (For example, refer to Patent Document 1 and Patent Document 2) When the pipe is inserted into the pipe joint, the markings approach each other depending on the degree of the pipe insertion, and the pipe is completely inserted into the pipe joint. There is also known a method for confirming the complete insertion of the pipe when the markings coincide with each other.

  There is also a known method for confirming the insertion of a pipe into the pipe joint when the pipe is inserted to a predetermined position with respect to the pipe joint, so that a protrusion protrudes from the pipe joint or a part of the outside is depressed. (For example, refer to Patent Document 3).

Aside from this, there is also known a method of confirming the complete connection state of the pipe at that moment by generating a confirmation sound only at the moment when the pipe is completely inserted into the pipe joint (for example, patents). Reference 4 and Patent Document 5).
JP 2005-163974 A JP 2002-147762 A JP 2004-332880 A JP 2004-232746 A JP 2005-291418 A

  However, in the connection confirmation method in which the marking line and the seal position are gradually aligned as the pipe is inserted into the pipe joint, for example, the pipe to the pipe joint while gradually moving the markings toward each other. When the connection state of the pipe is viewed from the outside, the connection is always performed with both markings visible. There is also a risk that the connection of the pipe joint pipe will be terminated halfway.

  Furthermore, in the method in which the protrusion protrudes from the pipe joint or is partially depressed when the pipe is inserted, there is a problem that it is difficult to confirm this in a dim place such as under the floor of the house or behind the ceiling.

In addition, in the method for confirming the connection of the pipe to the pipe joint using the confirmation sound, it may be difficult to hear the confirmation sound due to noise accompanying the surrounding construction. Further, once the pipe is connected to the pipe joint, this complete connection state cannot be confirmed by sound thereafter. Therefore, after connecting piping with a pipe joint in a house and connecting these pipes with a pipe joint, the connection confirmation state of these pipes and a pipe joint cannot be confirmed again.
An object of the present invention is to provide a pipe joint that can surely confirm that the pipe is completely inserted and connected to the pipe joint not only at the time of pipe connection but also after the pipe connection and a method for confirming the insertion of the pipe into the pipe joint. is there.

In order to solve the above-described problems, the pipe joint according to the present invention is:
A pipe joint body, a movable body housed in the pipe joint body and movable around the pipe axis direction, and the movable body within the pipe joint body at a first circumferential position and a second position around the pipe axis direction. A pipe joint having an elastic body that is selectively held at a circumferential position of
The moving body is moved to the second position in the pipe axial direction by moving the elastic body to the second position in the pipe axial direction while keeping the moving body in the first circumferential position by keeping the elastic body in the first position in the pipe axial direction. It is characterized in that it is moved to the second circumferential position.

  The moving body is reliably moved from the first circumferential position to the second circumferential position by using the elastic restoring force of the elastic body.

Moreover, the pipe joint according to claim 2 of the present invention is
A pipe joint main body, a rotating body housed in the pipe joint main body and capable of rotating around the pipe axis direction, and the rotating body within the pipe joint main body having a first rotational position and a second rotation position around the pipe axis direction. A pipe joint having an elastic body that is selectively held at a rotational position,
The elastic body is kept at the first position in the pipe axial direction by keeping the elastic body at the first position in the pipe axial direction, and the elastic body is moved in the pipe axial direction second by inserting the pipe into the pipe joint. The rotating body is rotated to the second rotational direction position by the elastic restoring force applied to the elastic body by moving to the position.

Moreover, the pipe joint according to claim 3 of the present invention is
It is possible to confirm the insertion of the pipe into the pipe joint by making it possible to confirm from the outside of the pipe joint that the rotating body has reached the second rotational position.

  Using the elastic restoring force of the elastic body, the rotating body can be reliably moved from the first rotating position to the second rotating position, and it can be confirmed from the outside of the pipe joint that the rotating body has moved to the second rotating position. This makes it possible to confirm the insertion of the pipe in the pipe joint.

Moreover, the pipe joint according to claim 4 of the present invention is the pipe joint according to claim 2,
The rotating body includes an outer cylindrical body and an inner cylindrical body whose outer peripheral surface is in sliding contact with the inner peripheral surface of the outer cylindrical body so as to be rotatable in the circumferential direction. Either one of the cylindrical body and the outer cylindrical body is rotatable about the pipe axis direction with respect to the pipe joint body.

  The rotating body is composed of an inner cylindrical body and an outer cylindrical body, and any one of the cylindrical bodies can be rotated in the pipe axis direction, so that the effect described in claim 2 can be sufficiently exerted.

The pipe joint according to claim 5 of the present invention is the pipe joint according to claim 4,
The inner cylindrical body is rotatable around the pipe axis direction with respect to the pipe joint body,
At least a part of the outer cylindrical body is made of a transparent member capable of confirming that the inner cylindrical body has reached the second rotational direction position;
The elastic body is made of a spring;
In order to hold the inner cylindrical body in the first rotational position, one end of the outer cylindrical body is connected to one end and the other end of the elastic body, and the elastic body is biased by a spring force. A first cutout portion and a second cutout portion that are held so as to be, and a cutout portion that holds the other end portion of the elastic body is formed at one end portion of the inner cylindrical body,
And in order to hold | maintain the said inner side cylinder body in a 2nd rotation position, when the said elastic body will be in a spring force release state adjacent to a 2nd notch part, the said outer side cylinder body is the other of the said elastic body. A step portion for holding the end of the inner cylindrical body is formed, and the inner cylindrical body is adjacent to the first cutout portion of the outer cylindrical body when the inner cylindrical body reaches a second circumferential rotational position. A notch part for preventing interference with one end part of the elastic body and a step part engaged with the one end part are formed.

  By providing the pipe joint with such a specific configuration, it is possible to surely confirm the insertion of the pipe in the pipe joint.

Further, the pipe joint according to claim 6 of the present invention is the pipe joint according to claim 5,
The pipe joint body is formed with a pipe part that enters the pipe, and the outer peripheral part of the pipe part is provided with at least one seal member that maintains liquid tightness with the pipe, between the pipe part and the inner cylindrical body. Is provided with a seal swell prevention ring having a seal swell prevention taper portion formed on the inner peripheral surface for preventing seal swell due to the pipe tip when the pipe is inserted into the pipe joint.

  By providing the seal joint with such a seal squeezing ring, it is possible to prevent seal squeezing and secure sealing performance when a pipe is inserted into the pipe joint.

Moreover, the moving body moving method in the pipe joint according to claim 7 of the present invention includes:
A pipe joint body, a movable body housed in the pipe joint body and movable around the pipe axis direction, and the movable body within the pipe joint body at a first circumferential position and a second position around the pipe axis direction. Prepare a pipe joint with an elastic body to selectively hold at the circumferential position of
By keeping the elastic body at the first position in the pipe axial direction, the movable body is kept at the first circumferential position,
Thereafter, the movable body is moved to the second circumferential position by moving the elastic body to the second position in the pipe axial direction.

  The moving body is reliably moved from the first circumferential position to the second circumferential position by using the elastic restoring force of the elastic body.

Moreover, the display switching method of the pipe joint according to claim 8 of the present invention includes:
A pipe joint body, a movable body accommodated in the pipe joint body and movable around the pipe axis direction, and a circumferential position of the movable body around the pipe axis direction in the pipe joint body is selectively held Prepare a pipe joint with an elastic body to
The display of the pipe joint is switched by moving the moving body in the pipe joint body by using the restoring force of the elastic material by releasing the restraint of the elastic material by inserting the pipe into the pipe joint body. It is characterized by that.

  By using the elastic restoring force of the elastic body, the circumferential position of the moving body can be moved, and thereby the display of the circumferential position of the moving body can be switched.

Moreover, the display switching method of the pipe joint according to claim 9 of the present invention is:
A pipe joint main body, a rotating body housed in the pipe joint main body and capable of rotating around the pipe axis direction, and the rotating body within the pipe joint main body having a first rotational position and a second rotation position around the pipe axis direction. Prepare a pipe joint with an elastic body to selectively hold in the rotational position,
By displaying the elastic body in the first rotational direction position by keeping the elastic body at the first position in the pipe axial direction,
Then, the elastic body is moved to the second position in the pipe axial direction by inserting the pipe into the pipe joint, and the rotating body is moved to the second rotational position by the elastic restoring force applied to the elastic body. Rotate,
By rotating the rotating body to the second rotation position, the display is switched to the display in which the rotating body has reached the second rotation direction position.

  Using the elastic restoring force of the elastic body, the rotary body is reliably moved from the first rotational direction position to the second rotational direction position, thereby switching to a display in which the rotary body has reached the second rotational direction position. Can do.

Further, the method for confirming the insertion of the pipe into the pipe joint according to claim 10 of the present invention,
By using the pipe joint display switching method according to claim 8 or claim 9, the insertion confirmation of the pipe into the pipe joint is performed.

  Using the elastic restoring force of the elastic body, the moving body (rotating body) is reliably moved from the first moving position (rotational direction position) to the second moving position (rotational direction position), thereby moving the moving body (rotating body). By making it possible to confirm from the outside of the pipe joint that the body has moved to the second movement position (rotation direction position), it becomes possible to confirm the insertion of the pipe in the pipe joint.

  Using the elastic restoring force of the elastic body, the rotating body is surely moved from the first rotational direction position to the second rotational direction position, thereby indicating that the rotating body has moved to the second rotational position. It is possible to confirm the insertion of the pipe in the pipe joint.

  According to the present invention, it is possible to provide a pipe joint that can surely confirm that the pipe is completely inserted and connected to the pipe joint not only at the time of pipe connection but also after the pipe connection and a method for confirming the insertion of the pipe into the pipe joint.

  Hereinafter, a pipe joint concerning one embodiment of the present invention is explained based on a drawing. As shown in FIG. 1, a pipe joint 1 according to an embodiment of the present invention includes a joint main body including a pipe body 10 and an outer cap 20, a transparent cylindrical body 30 and a display cylindrical body 40 housed in the joint main body. The retaining ring 50 and the spacer 60 held by the transparent cylinder 30 and the outer cap 20, the torsion spring 70 held by the transparent cylinder 30 and the display cylinder 40, the display cylinder 40 and the pipe body 10 is provided with a seal squeezing prevention ring 80 interposed therebetween.

  The pipe body 10 is made of, for example, NPb-treated boring, and here, a large diameter portion 11 screwed and connected to a pipe (not shown), a flange portion 12 adjacent to the large diameter portion 11, and a flange portion 12 and a small-diameter portion 15 that enters the other pipe P. A screw portion 13 for fixing the transparent cylindrical body 30 with screws is formed between the flange portion 12 and the small diameter portion 15. Further, a display cylinder 40 is in contact with the stepped portion 14 formed between the screw portion 13 and the small diameter portion 15. Two grooves 16 and 17 are formed in the circumferential direction on the distal end side of the small diameter portion 15, and an O-ring 90 is fitted into the grooves 16 and 17 to form a double seal portion.

  The outer cap 20 is made of brass, for example, has a cylindrical shape as shown in FIG. 2, and confirmation windows 21 are formed at two locations facing each other in the circumferential direction. The confirmation window 21 is used to confirm whether or not the pipe P has been completely inserted into the pipe joint 1. Further, a female thread portion 22 for connection with the tube body 10 is formed on the inner periphery of one end portion of the outer cap 20, and the outer diameter of the pipe P inserted into the pipe joint 1 is approximately the other end portion. An inward flange portion 23 (see FIG. 1) having an equal inner diameter is formed.

  The transparent cylindrical body 30 is made of, for example, a transparent acrylic resin. As shown in FIG. 3, one end 71 of the torsion spring 70 and the other end 72 (see FIG. 6) are applied to one end as a spring force. A first cutout portion 31 and a second cutout portion 32 that are held to be in a biased state are provided. A step of holding the other end 72 of the torsion spring 70 at one end of the transparent cylindrical body 30 adjacent to the second notch 32 when the torsion spring 70 is released. A portion 33 is formed. Further, a seat portion 34 is formed on the other end portion of the transparent cylindrical body 30 so as to abut the other end portion of the display cylindrical body 40 on its inner peripheral portion and hold it.

  The display cylinder 40 is made of, for example, POM (polyacetal) having excellent slidability. As shown in FIG. 1, both ends of the display cylinder 40 are a step portion 14 of the outer cap 20 and a seat portion 34 of the transparent cylinder 30. It is pinched | interposed through the slight clearance gap between them, and can rotate freely in the circumferential direction within a transparent cylindrical body. As shown in FIG. 4, a cutout portion 42 that holds the other end 72 of the torsion spring 70 is formed at one end of the display cylinder 40, and the first cutout of the transparent cylinder 30 is formed. A wide notch 43 and one end for preventing interference with one end 71 of the torsion spring 70 when the display cylinder 40 reaches the second rotational position at a position adjacent to the notch 31. A stepped portion 43 a that engages 71 is formed. The notch depths of these notch portions 42 and 43 are substantially the same as the notch depth of the first notch portion 31 of the transparent cylindrical body 30.

  As shown in FIGS. 5A and 5B, an NG mark indicating that the pipe P is not completely inserted into the pipe joint 1 at the circumferentially opposed position of the outer peripheral portion of the display cylinder 40. 45 is marked with an appropriate angle A ° in the circumferential direction, and an OK mark 46 is marked adjacent to the NG mark 45 in the circumferential direction and indicating that the pipe P has been completely inserted into the fitting 1. Yes. The NG mark 45 is visible from the confirmation window 21 of the outer cap 20 when the display cylinder 40 is at the first rotation position shown in FIG. 7 with respect to the transparent cylinder 30. Further, the OK mark 46 is visible from the confirmation window 21 of the outer cap 20 when the display cylinder 40 is at the second rotational position shown in FIG. 8 with respect to the transparent cylinder 30. FIG. 10 is a perspective view showing a semi-assembled state in which only the outer cap 20 is removed from the pipe joint 1.

  In the case of this embodiment, the tube body 10, the outer cap 20, and the transparent cylindrical body 30 are integrated and assembled, and these constitute a pipe joint body, and the display cylinder 40 constitutes a moving body.

  The torsion spring 70 is made of a material having excellent corrosion resistance, such as SUS304 or SUS316, for example. When the both ends are spring-biased as shown in FIG. Is formed at a certain angle, and in a state where the spring force is released, as shown in FIG. 6 (b), it projects toward the outer cap at an angle larger than the angle shown in FIG. 6 (a). ing. The torsion spring 70 has one end 71 engaged with the first notch 31 of the transparent cylindrical body 30 and the other end 72 of the second notch of the transparent cylindrical body 30 before the pipe is inserted. 32, and the other end 72 is engaged with the notch 42 of the display cylinder 40, whereby the display cylinder 40 is held at the first rotational position shown in FIG. ing.

  The torsion spring 70 may be another spring such as a thin plate spring as long as it can be used in the structure shown in FIGS. 6 (a) and 6 (b).

  Further, the torsion spring 70 pushes the torsion spring 70 in the insertion direction of the pipe tip as the pipe P is inserted into the pipe joint 1, so that the other end 72 of the torsion spring 70 is connected to the second end of the transparent cylindrical body 30. The other end 72 is pushed out from the notch 32 and is instantaneously moved to the step 33 of the transparent cylindrical body 30 by the elastic restoring force of the torsion spring. At this time, since the other end 72 of the torsion spring 70 remains engaged with the notch 43 of the display cylinder 40, the torsion spring from the second notch 32 of the transparent cylinder 30 is maintained. The transparent cylindrical body is rotated in the circumferential direction by the elastic restoring force accompanying the disengagement of 70, and the other end 72 of the torsion spring 70 contacts the step 33 of the transparent cylindrical body 30. The rotation stops at the second rotation position shown in FIG. The notch 43 of the display cylinder 40 corresponding to the first notch 31 of the transparent cylinder 30 is formed wider than the rotation angle due to the restoring force of the spring. It does not interfere with one end 71 of the torsion spring 70 during rotation.

  The retaining ring 50 is made of, for example, SUS301 spring material, SUS304 spring material, or the like. As shown in FIG. 9, the ring portion 51 that is slidably in contact with the spacer 60 and the inner periphery from the inner peripheral edge of the ring portion 51. It has a protruding portion 52 that protrudes over the entire circumference in the circumferential direction at a certain angle. The protrusion 52 is formed with a large number of slits 53 at predetermined intervals in the circumferential direction. The protrusion 52 is pushed and expanded in accordance with the pipe insertion so that the inner diameter of the protrusion 52 is increased and the pipe insertion is not hindered. At the same time, it plays the role of preventing the pipe P once inserted into the pipe joint 1 from coming off. As shown in FIG. 1, the retaining ring 50 has a ring portion 51 sandwiched between an inward flange portion 23 of the outer cap 20 and the other end portion of the transparent cylindrical body 30 via a spacer 60. It is held in the joint.

  The spacer 60 is made of, for example, POM (polyacetal) having excellent slidability, has a ring shape, and is a retaining ring even when the pipe P is inserted into the pipe joint 1 while rotating in the circumferential direction. 50 plays the role of rotating in the circumferential direction following this.

  The seal swell prevention ring 80 is made of, for example, POM (polyacetal) having excellent slidability, and a seal swell prevention taper portion 81 that prevents the seal from squeezing due to the pipe tip when the pipe is inserted into the pipe joint. (See FIG. 13) is formed on the inner peripheral surface thereof. The seal squeezing prevention ring 80 is inserted in the direction of insertion of the pipe tip by the O-ring 90 on the end side of the tube body 10 contacting the seal squeezing prevention taper 81 before inserting the pipe into the pipe joint. The protrusion 52 of the retaining ring 50 contacts the end of the seal squeezing prevention ring 80 to restrict the movement of the pipe tip in the direction opposite to the insertion direction.

  Next, an insertion procedure for inserting the pipe P into the pipe joint 1 having the above configuration and an insertion confirmation method for confirming that the pipe P has been completely inserted into the pipe joint 1 will be described.

  First, the pipe joint 1 and the pipe P to be inserted into the pipe joint 1 are prepared. It is assumed that the male thread portion around the large diameter portion of the pipe joint 1 is screwed into a female thread portion (not shown) of the pipe in advance and is completely connected.

  When the pipe P is inserted from the other end of the pipe joint 1 (the right end in FIG. 1), the end of the pipe P first expands the protrusion 52 of the retaining ring 50 to expand the end of the seal swell prevention ring 80. To touch. At this time, since a large number of slits 53 are formed in the protruding portion 52 of the retaining ring 50 in the circumferential direction, the pipe P can easily expand the projecting portion 52 of the retaining ring 50.

  When the end of the pipe P comes into contact with the end of the seal squeezing prevention ring 80 and the pipe P is further inserted, the seal squeezing prevention taper 81 of the seal squeezing prevention ring 80 causes the O-ring 90 to become the groove of the tube body 10. The O-ring 90 is compressed without coming from 16 and 17 and guided so as to contact the inner peripheral surface of the pipe P.

  When the pipe P is further inserted, the pipe P moves together with the seal squeezing prevention ring 80 along the inner peripheral portion of the display cylinder 40 toward the step portion 14 of the tube body 10, and eventually the tip of the seal squeezing prevention ring 80. Reaches the torsion spring 70.

  At this stage, the torsion spring 70 is engaged with the display cylinder 40 and the transparent cylinder 30 so that the display cylinder 40 is in the first rotational position (see FIG. 7) with respect to the transparent cylinder 30. Yes. Specifically, one end of the torsion spring 70 engages with the first notch 31 of the transparent cylindrical body 30, and the other end 72 engages with the second notch 32 of the transparent cylindrical body 30. At the same time, the other end 72 is engaged with the notch 42 of the display cylinder 40 so that the display cylinder 40 is in the first rotational position with respect to the transparent cylinder 30 (see FIG. 7). keeping.

  When the pipe P is further inserted, the end portion of the seal squeezing prevention ring 80 pushes the torsion spring 70 in the insertion direction of the pipe tip, and the torsion spring 70 reaches the step portion 14 of the tube body 10. At this time, the torsion spring 70 is such that the pipe 72 pushes the torsion spring 70 in the insertion direction of the pipe tip as the pipe is inserted into the pipe joint 1, so that the other end 72 of the torsion spring 70 is the first of the transparent cylindrical body 30. 2 Detach from the notch 32. As a result, the other end 72 of the torsion spring 70 is instantaneously moved to the step 33 of the transparent cylindrical body 30 by its elastic restoring force. At this time, since the other end 72 of the torsion spring 70 remains engaged with the notch 43 of the display cylinder 40, the transparent cylinder 30 is moved in the circumferential direction by the elastic restoring force of the torsion spring 70. Rotate to The other end 72 of the torsion spring 70 abuts on the step 33 of the transparent cylindrical body 30 to rotate the display cylindrical body 40 relative to the transparent cylindrical body 30 at the second rotational position (see FIG. 8). Stop at. A notch 43 that prevents interference with the torsion spring 70 during the rotation of the display cylinder 40 is formed at the end of the display cylinder 40 corresponding to the first notch 31 of the transparent cylinder 30. Therefore, the one end 71 of the torsion spring 70 abuts on the step 43 a of the display cylinder 40 without the one end 71 of the torsion spring 70 preventing the rotation of the display cylinder 40.

  In this way, when the display cylinder 40 reaches the second rotation position (see FIG. 8) in the rotation direction with respect to the transparent cylinder 30 and stops, the display cylinder 40 via the confirmation window 21 of the outer cap 20. The OK mark 46 marked 40 is visible from the outside. That is, the display is performed by releasing the biased state of the torsion spring 70 when the display cylinder 40 is in the first rotation position (see FIG. 7) until it reaches the second rotation position (see FIG. 8). The marking on the cylindrical body 40 is changed from the NG mark 45 to the OK mark 46 instantly through the confirmation window 21 of the outer cap 20. Thus, by switching to the marking of completion of insertion in an instant, the operator is strongly impressed that the pipe P has been completely inserted into the pipe joint 1. As a result, there is no risk of ending the halfway connection work between the pipe and the pipe joint as in the conventional method in which the markings approach each other.

  In addition to this, when the display cylinder 40 reaches the second rotational position, a confirmation sound is generated when the other end 72 of the torsion spring 70 strikes the step 33 of the transparent cylinder 30 vigorously. Therefore, the operator can confirm the moment when the pipe P is completely inserted into the pipe joint 1 not only by visual observation but also by ear.

  In addition to this, when the pipe insertion state of each pipe P to the pipe joint 1 is finally confirmed after all the connection work of each pipe arranged in the house to each pipe joint is completed, the outer cap 20 is confirmed. Since the OK mark 46 can be confirmed simply by visually observing from the window 21, the confirmation work becomes much easier than before even if the pipe and the pipe joint are arranged in a dimly lit ceiling or under the floor. In this case, the effect can be further increased by marking using a fluorescent paint or a reflective material.

  In this way, the operation for inserting the pipe P into the pipe joint 1 and the operation for confirming the insertion are completed. It should be noted that the pipe P is not easily pulled out of the pipe joint 1 because the protrusion 52 of the retaining ring 50 is inserted into the outer periphery of the pipe P as the pipe P is inserted into the pipe joint 1.

  FIG. 15 is a perspective view of a header 100 provided with a plurality (two in FIG. 15) of such pipe joints. In this case, tap water pipes (not shown) are connected to both ends of an elongated header body 110 made of a corrosion-resistant metal, and the pipe joint 1 is screwed into two pipe joint attachment portions 111 and 112 of the header body 110, respectively. Stop and fix. Then, the pipe P is inserted into the pipe joint 1 by the procedure as described above, and the state where the pipe P is completely inserted into the pipe joint 1 can be confirmed by rotating the display cylinder 40 and producing an OK mark. It has become. In this way, it is possible to distribute and supply tap water from one tap water pipe to each pipe via a plurality of pipe joints.

  In the above-described embodiment, the transparent cylindrical body 30 is fixed to the outer cap 20 and the tube body 10, and the display cylindrical body 40 inside the transparent cylindrical body 30 rotates in the circumferential direction with respect to the transparent cylindrical body 30. It was. However, the present invention is not necessarily limited to this configuration, and the inner display cylinder is fixed to the outer cap and the joint body to form a fixed cylinder, and the outer transparent cylinder is inserted into the fixed cylinder through the relief portion. You may make it the edge part of a torsion spring engage. In this case, the outer transparent cylindrical body serves as a display cylindrical body, and the outer transparent cylindrical body is rotated with respect to the fixed cylindrical body when the biasing force of the torsion spring is released. In this case, an OK mark and an NG mark are attached at appropriate positions in the circumferential direction of the outer transparent cylindrical body, and the OK mark or the NG mark is selectively displayed on the confirmation window 21 of the outer cap 20 according to the degree of pipe insertion. To.

  By using the inner cylindrical body as a fixed cylindrical body, even if the pipe insertion angle is slightly deviated during pipe insertion, the outer transparent cylindrical body can be smoothly rotated without impeding the rotation.

  Further, unlike the present embodiment, it is not always necessary to have a double structure of a display cylinder and a transparent cylinder, and a single cylinder formed with angular positions where the NG mark and the OK mark are different in the circumferential direction. The cap and the joint main body may be rotatable around the pipe axis direction at the pipe tip, and the NG mark and the OK mark may be selectively displayed in the confirmation window of the outer cap according to the degree of pipe insertion. .

  Further, the NG mark or the OK mark displayed on the display cylinder may be a display cylinder with a seal on which such a mark is written instead of being marked on the display cylinder itself. .

  Moreover, as long as the effect of the present invention is exhibited, it is possible to accommodate various shapes of moving bodies in the pipe joint instead of the above-described display cylinder and notify only the pipe insertion completion to the outside of the pipe joint. Thus, the above-described confirmation markings are not necessarily limited to cylindrical bodies.

  In addition, the materials described in the above-described embodiments are merely illustrative, and any materials can be used as long as they exhibit the effects of the present invention.

It is sectional drawing which cuts along the longitudinal direction and shows the pipe joint concerning one Embodiment of this invention with the pipe inserted in this. It is a perspective view which shows the outer cap of the pipe joint shown in FIG. It is a perspective view which shows the transparent cylindrical body of the pipe joint shown in FIG. It is a perspective view which shows the cylinder for a display of the pipe joint shown in FIG. FIG. 5 is an end view (FIG. 5 (a)) and a side view (FIG. 5 (b)) showing markings on the display cylinder shown in FIG. 4. FIG. 7 is a perspective view illustrating the torsion spring of the pipe joint illustrated in FIG. 1 until it changes from a spring force biased state (upper side in FIG. 6) to a spring force released state (lower side in FIG. 6). It is a perspective view which shows the state which has the display cylinder of the pipe joint shown in FIG. 1 in a 1st rotation position with a transparent cylinder and a torsion spring. It is a perspective view which shows the state which has the display cylinder of the pipe joint shown in FIG. 1 in a 2nd rotation position with a transparent cylinder and a torsion spring. FIG. 2 is a perspective view showing a retaining ring of the pipe joint shown in FIG. 1. It is a perspective view shown in the state which removed the outer cap of the pipe joint shown in FIG. It is the perspective view which showed the state just before inserting a pipe in the pipe joint shown in FIG. It is sectional drawing which cuts along the longitudinal direction and shows the state which inserted the pipe a little in the pipe joint shown in FIG. It is sectional drawing which cuts along the longitudinal direction and shows the state which inserted the pipe completely in the pipe joint following FIG. It is a perspective view which shows the state corresponding to FIG. A perspective view of a header provided with a plurality of pipe joints of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe joint 10 Tubing body 11 Large diameter part 12 Flange part 13 Screw part 14 Step part 15 Small diameter part 16, 17 Groove part 20 Outer cap 21 Confirmation window 22 Female thread part 23 Flange part 30 Transparent cylindrical body 31 1st notch part 32 Second cutout portion 33 Step portion 34 Seat portion 40 Cylindrical body for display 42, 43 Notch portion 43a Step portion 45 NG mark 46 OK mark 50 Retaining ring 51 Ring portion 52 Projection portion 53 Slit 60 Spacer 70 Torsion spring 71 One side End 72 of the other end 80 seal squeezing prevention ring 81 seal squeezing prevention taper part 90 O-ring 100 header 110 header body 111, 112 fitting joint P pipe

Claims (10)

A pipe joint body, a movable body housed in the pipe joint body and movable around the pipe axis direction, and the movable body within the pipe joint body at a first circumferential position and a second position around the pipe axis direction. A pipe joint having an elastic body that is selectively held at a circumferential position of
The moving body is moved to the second position in the pipe axial direction by moving the elastic body to the second position in the pipe axial direction while keeping the moving body in the first circumferential position by keeping the elastic body in the first position in the pipe axial direction. A pipe joint characterized by being moved to the second circumferential position. A pipe joint main body, a rotating body housed in the pipe joint main body and capable of rotating around the pipe axis direction, and the rotating body within the pipe joint main body having a first rotational position and a second rotation position around the pipe axis direction. A pipe joint having an elastic body that is selectively held at a rotational position,
The elastic body is kept at the first position in the pipe axial direction by keeping the elastic body at the first position in the pipe axial direction, and the elastic body is moved in the pipe axial direction second by inserting the pipe into the pipe joint. The pipe joint according to claim 1, wherein the rotating body is rotated to a second rotational direction position by an elastic restoring force applied to the elastic body by being moved to the position.   The pipe insertion into the pipe joint can be confirmed by making it possible to confirm from the outside of the pipe joint that the rotating body has reached the second rotational position. Item 3. The pipe joint according to Item 2.   The rotating body includes an outer cylindrical body and an inner cylindrical body whose outer peripheral surface is in sliding contact with the inner peripheral surface of the outer cylindrical body so as to be rotatable in the circumferential direction. The pipe joint according to claim 2, wherein either one of the cylindrical body and the outer cylindrical body is rotatable about the pipe axis direction with respect to the pipe joint main body. The inner cylindrical body is rotatable around the pipe axis direction with respect to the pipe joint body,
At least a part of the outer cylindrical body is made of a transparent member capable of confirming that the inner cylindrical body has reached the second rotational direction position;
The elastic body is made of a spring;
In order to hold the inner cylindrical body in the first rotational position, one end of the outer cylindrical body is placed at one end and the other end of the elastic body in a state where the elastic body is biased by a spring force. A first cutout portion and a second cutout portion that are held so as to be, and a cutout portion that holds the other end portion of the elastic body is formed at one end portion of the inner cylindrical body,
And in order to hold | maintain the said inner side cylinder body in a 2nd rotation position, when the said elastic body will be in a spring force release state adjacent to a 2nd notch part, the said outer side cylinder body is the other of the said elastic body. A step portion for holding the end of the inner cylindrical body is formed, and the inner cylindrical body is adjacent to the first cutout portion of the outer cylindrical body when the inner cylindrical body reaches a second circumferential rotational position. The pipe joint according to claim 4, wherein a notch portion that prevents interference with one end portion of the elastic body and a step portion that engages with the one end portion are formed.   The pipe joint body is formed with a pipe part that enters the pipe, and the outer peripheral part of the pipe part is provided with at least one seal member that maintains liquid tightness with the pipe, between the pipe part and the inner cylindrical body. And a seal swell prevention ring having a seal swell prevention taper portion formed on an inner peripheral surface for preventing seal swell due to the pipe tip when the pipe is inserted into the pipe joint. Item 6. The pipe joint according to Item 5. A pipe joint body, a movable body housed in the pipe joint body and movable around the pipe axis direction, and the movable body within the pipe joint body at a first circumferential position and a second position around the pipe axis direction. Prepare a pipe joint with an elastic body to selectively hold at the circumferential position of
By keeping the elastic body at the first position in the pipe axial direction, the movable body is kept at the first circumferential position,
Thereafter, the movable body is moved to the second circumferential position by moving the elastic body to the second position in the pipe axial direction. A pipe joint body, a movable body accommodated in the pipe joint body and movable around the pipe axis direction, and a circumferential position of the movable body around the pipe axis direction in the pipe joint body is selectively held Prepare a pipe joint with an elastic body to
The display of the pipe joint is switched by moving the moving body in the pipe joint body by using the restoring force of the elastic material by releasing the restraint of the elastic material by inserting the pipe into the pipe joint body. A method for switching the display of a pipe joint. A pipe joint main body, a rotating body housed in the pipe joint main body and capable of rotating around the pipe axis direction, and the rotating body within the pipe joint main body having a first rotational position and a second rotation position around the pipe axis direction. Prepare a pipe joint with an elastic body to selectively hold in the rotational position,
By displaying the elastic body at the first rotational direction position by keeping the elastic body at the first position in the pipe axial direction,
Then, the elastic body is moved to the second position in the pipe axial direction by inserting the pipe into the pipe joint, and the rotating body is moved to the second rotational position by the elastic restoring force applied to the elastic body. Rotate,
A display switching method for a pipe joint, wherein the display is switched to a display in which the rotating body has reached the second rotational direction position by rotating the rotating body to the second rotational position.   A method for confirming the insertion of a pipe into a pipe joint, wherein the pipe is confirmed to be inserted into the pipe joint by using the display switching method for a pipe joint according to claim 8 or 9.

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