JP5939860B2 - Assembling method of pipe joint, spacer for temporary fixing used for pipe joint and pipe joint - Google Patents

Description

  According to the present invention, there is provided a joint body provided with a packing housing portion that expands in diameter toward the receiving end on the inner peripheral surface, a ring packing housed in the packing housing portion, and a relative proximity movement to the joint body. A push ring that compresses the ring packing, a lock ring that is housed in a lock ring housing portion formed on an inner peripheral surface of the push ring, and a bolt and a nut that connect the coupling portion of the push ring and the coupling portion of the joint body The lock ring housing portion of the push ring is provided with a diameter reduction guiding means for reducing the diameter of the lock ring in accordance with the relative proximity movement of the push ring and the joint body by the tightening operation of the bolt and nut. Further, the present invention relates to a temporary fixing spacer used for the pipe joint and a method for assembling the pipe joint.

  Such pipe joints are used to join fluid pipes such as water pipes, gas pipes, etc., by moving the press ring relatively close to the joint body, thereby reducing the diameter of the lock ring and accommodating the ring packing. It is configured to prevent the movement of the joined fluid pipes coming out by being compressed in the part (see, for example, Patent Document 1).

For example, in the pipe joint disclosed in Patent Document 1, a joint body and a push ring are fitted on the fluid pipe, and the outer diameter of the fluid pipe and the inner circumference of the joint body are expanded on the receiving end side. A ring packing is accommodated between the housing and the lock ring housing between the outer peripheral surface of the fluid pipe and the inner peripheral surface of the press ring. A ring is housed. An annular retainer is disposed between the ring packing and the lock ring. The joint body is formed with a main body side connecting portion having a main body side insertion hole, and the pusher wheel is formed with a push ring side connecting portion having a push ring side insertion hole, and the main body side insertion hole and the press ring side insertion hole are formed. A nut is screwed onto the bolt that passes through the nut.
With such a configuration, when the bolt and the nut are tightened, the pusher wheel moves relatively close to the joint body side, and the lock ring is pressed by the lock ring housing portion of the push wheel to reduce the diameter, while the retainer is interposed. By pressing the ring packing and compressing it in the packing housing, the blade formed on the inner peripheral surface of the lock ring bites into the outer peripheral surface of the fluid pipe, and the inner peripheral surface of the ring packing contacts the outer peripheral surface of the fluid pipe. In close contact. Thereby, it is set as the structure which prevents well that the fluid pipe | tube inserted in the coupling main body via the push ring moves out of the coupling main body in the pulling-out direction.

On the other hand, such a pipe joint is locked in advance in a factory or the like so that an operator can simply join a fluid pipe by simply tightening a plurality of bolts and nuts arranged in the circumferential direction at the construction site. A ring, ring packing, and the like are arranged in an intended arrangement state, and the joint body and the press ring are temporarily assembled with bolts and nuts, thereby improving work efficiency at the construction site.
However, if the bolt and nut are partially tightened due to vibration during transportation of the pipe joint, etc., and the fastening state changes, the lock ring, ring packing, etc. disposed between the joint main body and the presser wheel will become circumferential. There is a risk of tilting, etc., resulting in a disposition that is different from the intended disposition. The sealing performance by the ring packing and the retaining performance by the lock ring may change (decrease), and the expected disposition There is a possibility that the insertion of the fluid pipe itself may be difficult due to contact with a ring packing, a lock ring, or the like arranged out of the state.
For this reason, in the pipe joint disclosed in Patent Document 1, an engaging portion of a spacer having a predetermined width is detachably attached to a bolt positioned between the main body side connecting portion of the joint body and the presser wheel side connecting portion of the press ring. Even if the bolts and nuts are partially tightened, the presser wheel is restricted from moving closer to the joint body beyond a predetermined width. As a result, the fastening state of the bolt and nut is prevented from changing, and the lock ring and the ring packing disposed between the press ring and the joint body are not moved inadvertently during transportation. And the arrangement state of the lock ring can be maintained in the intended arrangement state.

Japanese Patent No. 4200558

Here, the pipe joint as described above is often used to join a fluid pipe buried in the soil or a buried fluid pipe, but the construction pit excavated when working in the soil is In order to reduce costs, shorten excavation time, etc., it is usual that the space is a relatively small space as long as necessary as long as safety can be ensured. Similarly, when there are obstacles or the like around the fluid pipe, the construction pit becomes a necessary and relatively small space avoiding the obstacles.
In a construction pit in such a relatively narrow space, there are the following problems when fluid pipes are joined using pipe joints.

For example, in the pipe joint disclosed in Patent Document 1, the spacer is formed by bending a belt-like body having a predetermined width and thickness, and is slightly smaller than the outer diameter of the gripping portion formed in a ring shape and the bolt. An engagement portion having an arc shape with an inner diameter and an opening is formed, and the engagement portion is engaged with the bolt through the opening. The engaging portion is formed with a predetermined width in the bolt axis direction, and the engaging portion is located between the joint body and the press ring so that when the bolt and nut are tightened, the joint is The interval between the main body and the press wheel is configured to have a predetermined width. Then, by grasping the gripping portion of the spacer and pulling in the diameter direction of the bolt, the engaging portion engaged with the bolt is elastically deformed, and the opening can be opened and removed.
However, when an engaging part is arranged between the joint body and the press ring and the bolt and nut are tightened and temporarily assembled, the bolt and nut are not tightened or loosened due to vibration during transportation. It is necessary to tighten with the tightening torque, and the engaging portion (spacer) positioned between the joint body and the press ring is similarly tightened.
In this case, the spacer cannot be removed only by gripping the grip portion and pulling in the diameter direction of the bolt, or a strong pulling force needs to be applied to remove the spacer.
In particular, as described above, it is very difficult to apply such a pulling force in a construction pit in a relatively narrow space, which increases the labor of the worker, reduces the work efficiency, and reduces the work. There is a risk of prolonging the time.

  The present invention has been made in view of such circumstances, and its purpose is to simply install a temporary fixing spacer between the press ring and the joint body to realize reliable temporary fixing, and for temporary fixing. It is an object of the present invention to provide a pipe joint that can reliably release the temporary fixing of the spacer with little effort, a spacer for temporary fixing used in the pipe joint, and a method for assembling the pipe joint.

In order to achieve the above object, a first characteristic configuration of the present invention includes: a joint body provided with a packing housing portion whose diameter is enlarged toward the receiving end on the inner peripheral surface; and a ring packing housed in the packing housing portion. A push ring that compresses the ring packing with relative proximity to the joint body, a lock ring that is housed in a lock ring housing portion formed on an inner peripheral surface of the push ring, and a coupling portion of the push ring A bolt and a nut that connect the coupling portion of the joint body, and the lock ring housing portion of the pusher wheel is moved with relative movement of the pusher wheel and the joint body by a tightening operation of the bolt and nut. A pipe joint provided with a diameter reducing means for reducing the diameter of the lock ring,
A temporary fixing spacer capable of maintaining the interval between the push wheel and the joint body at a predetermined temporary fixing interval;
The main body base portion of the temporary fixing spacer includes at least a part of the connecting portion of the press ring and a gripping portion that protrudes radially outward from the connecting portion of the joint main body, and an opposing surface of the press ring and the joint main body. An interval regulating portion sandwiched between, an inner peripheral surface of a bolt insertion hole formed in a connection portion of the push wheel, or an inner peripheral surface of a bolt insertion hole formed in a connection portion of the joint body, and the bolt A locking piece that can be inserted from the direction of the bolt axis with respect to the gap formed between the outer circumferential surface and the outer peripheral surface is provided,
When the spacer for temporary fixing is rotated along the inner peripheral surface of the bolt insertion hole of the pusher wheel or the joint body in a state where the locking piece is inserted into the gap, the interval restricting portion is moved to the pusher wheel. There is a configuration in which the posture can be freely changed between a temporarily fixed posture positioned at a space regulation position between the opposing surfaces of the joint body and a space regulation release posture in which the space regulation part is detached from the space regulation position.

  According to the above configuration, since the temporary fixing spacer for maintaining the interval between the press ring and the joint main body at a predetermined temporary fixing interval is basically provided, the lock ring, the ring packing, etc. are preliminarily provided in a factory or the like. The joint body and the push ring can be temporarily assembled with bolts and nuts, and it is possible to prevent the fastening state of the bolts and nuts from changing during transportation, etc. It is possible to maintain the ring packing and the like in a desired arrangement state.

In addition, when the temporary fixing spacer is attached between the joint body and the press ring and the joint main body and the press ring are temporarily fixed, at least a part protrudes radially outward from the connecting portion of the press ring and the joint main body. Gripping the gripping portion, the inner peripheral surface of the bolt insertion hole formed in the connecting portion of the push wheel or the inner peripheral surface of the bolt insertion hole formed in the connecting portion of the joint body and the outer periphery of the bolt Insertion into the gap formed between the bolt and the bolt from the axial direction of the bolt, and by rotating along the inner peripheral surface of the bolt insertion hole with the locking piece inserted in the gap It can be set as the temporarily fixed attitude | position which located the part in the space | interval control position between the opposing surfaces of a wheel and a coupling main body. Then, by tightening the bolts and nuts in this temporarily fixed posture, the interval restricting portion is held between the opposing surfaces of the press ring and the joint body, and the interval between the joint body and the press ring is set to a predetermined temporary stop interval. Can be maintained.
As a result, a gap formed between the inner peripheral surface of the bolt insertion hole and the outer peripheral surface of the bolt of the push ring or the joint body by gripping the grip portion that can be easily gripped by the operator. After the insertion, the temporary fixing spacer can be brought into the temporary fixing posture by a simple operation of rotating the locking piece along the inner peripheral surface until the interval regulating portion is located at the interval regulating position. With a very simple configuration for attaching the stopper spacer, it is possible to reliably maintain the temporarily fixed state in which the interval between the joint body and the press ring is maintained at a predetermined interval by tightening the bolt and nut. .

Further, when the joint body and the press ring are finally tightened with bolts and nuts, the gripping portion is gripped, and the locking piece inserted into the gap is rotated along the inner peripheral surface of the bolt insertion hole. By rotating in the opposite direction to the stopping posture), the spacing restricting portion is positioned at a position disengaged radially outward from the spacing restricting position (temporary fastening posture) between the facing surfaces of the pusher wheel and the joint body. The posture can be easily changed to the interval restriction release posture. At this time, in particular, even when the joint body and the press ring are firmly tightened by the bolts and nuts, and the interval restricting portion is firmly sandwiched between the joint body and the press ring, the temporary fixing spacer is rotated. Therefore, the operator can easily apply a force to the temporary fixing spacer, and the posture can be easily changed even when the construction pit is a relatively narrow space. That is, the temporary fixing of the temporary fixing spacer can be easily and reliably released. In this clearance restriction release posture, if necessary, the temporary fixing spacer can be removed by removing the locking piece from the gap, and the bolt and nut are tightened to tighten the joint body and the press ring. Can be tightened.
As a result, the gripping portion that can be easily gripped is gripped, and the locking piece is rotated along the inner peripheral surface of the bolt insertion hole until the spacing regulating portion is located at a position separated from the spacing regulating position. With a simple and easy-to-use operation, the temporary fixing spacer can be easily changed to the spacing restriction release posture, and the temporary fixing of the temporary fixing spacer can be easily and reliably performed with a very simple configuration. Can be released.

  Therefore, it is possible to simply install a temporary fixing spacer between the press ring and the joint body to achieve reliable temporary fixing, and furthermore, the temporary fixing of the temporary fixing spacer can be reliably released with little effort. It was.

  The 2nd characteristic structure by this invention exists in the point which the said locking piece protrudes from the outer edge part of the one side surface of the thickness direction in the said main body base part toward the said thickness direction.

According to the above configuration, since the locking piece is formed to protrude in the thickness direction from the outer edge portion of one side surface in the thickness direction of the main body base portion, the bolt insertion hole formed in the coupling portion of the joint main body or the press ring is formed. Even when the gap formed between the inner peripheral surface and the outer peripheral surface of the bolt is formed at a position that enters inward in the radial direction from the outer edge of each connecting portion, when attaching the temporary fixing spacer, The locking piece can be easily inserted into the gap. Similarly, even when it is necessary to remove the temporary fixing spacer, it can be easily detached from the gap.
In addition, when the temporary fixing spacer is positioned between the joint body and the press ring, even if the temporary fixing spacer is detached from the joint main body and the press ring by its own weight, the latch inserted in the gap is inserted. Since the piece comes into contact with the inner peripheral surface of the bolt insertion hole or the outer peripheral surface of the bolt, detachment of the locking piece is well prevented. In particular, for example, when a press ring is placed on the joint body and temporarily fixed with bolts and nuts, the locking piece is placed in the gap between the inner peripheral surface of the bolt insertion hole of the joint main body and the outer peripheral surface of the bolt. When inserted, a part of the main body base portion of the temporary fixing spacer is placed on the upper surface of the joint portion of the joint body located substantially parallel to the horizontal direction, so the main body placed on the upper surface of the joint portion If the center of gravity of the temporary fixing spacer is positioned at a part of the base, the temporary fixing spacer is removed from between the joint body and the press ring in combination with the insertion of the locking piece into the gap. It is possible to prevent the separation well. In this case, the operator temporarily releases the gripping without stopping the gripping portion of the temporary fixing spacer positioned in the temporary fixing posture (the spacing regulating portion is located at the spacing regulating position), and then the bolt and nut The tightening operation can be performed with both hands, and the efficiency of the temporary fixing work can be improved.
Therefore, a temporary fixing spacer can be more easily installed between the press ring and the joint body to realize a reliable temporary fixing, and the temporary fixing of the temporary fixing spacer can be more reliably released with less effort. .

  According to a third characteristic configuration of the present invention, there is a bolt axis direction of the locking piece with respect to the gap between the main body base of the temporary fixing spacer and the pusher wheel or the joint main body in the clearance restriction releasing posture. The point is that an attachment / detachment operation space that allows the insertion / removal movement is formed.

  According to the above configuration, the detaching operation that allows the locking piece to be inserted and removed in the bolt axis direction with respect to the gap between the main body base of the temporary fixing spacer in the interval restriction release posture and the press ring or the joint main body. Since the space is formed, the locking piece can be reliably inserted into the gap without being obstructed by the joint body or the push ring, and the locking piece can be reliably removed from the gap, and temporarily fixed. The attachment and removal of the spacer can be performed reliably.

  According to a fourth characteristic configuration of the present invention, the thickness of the main body base is formed to be thinner by a dimension corresponding to the insertion / removal allowance of the locking piece than the thickness of the interval restriction portion, and is in the interval restriction release posture. The attachment / detachment operation space is formed between the main body base of the temporary fixing spacer and the push ring or the joint main body.

  According to the above configuration, the thickness of the main body base is formed thinner than the thickness of the interval regulating portion by a dimension corresponding to the insertion / removal allowance of the locking piece. Desorption operation space based on the difference in thickness from the piece can be formed reliably, and at least by changing the shape of the spacer for temporary fixing, the joint body and the pusher wheel with the same shape as the conventional product can be used. Thus, it is possible to easily and reliably move the engaging piece in and out of the gap in the bolt axis direction.

  According to a fifth characteristic configuration of the present invention, the push wheel or the joint main body is formed with a recess that forms the desorption operation space between a surface facing the main body base of the temporary fixing spacer in the clearance restriction releasing posture. There is in point.

  According to the above configuration, since the recess is formed in the press wheel or the joint body between the opposing surfaces of the temporary fixing spacer in the clearance restriction release state, the detachment operation based on the recess is performed on the press wheel or the joint body itself. A space can be formed reliably, and at least by changing the shape of the pusher wheel or the joint body, it is not necessary to use a complicated shape as a temporary fixing spacer, and in the direction of the bolt axis of the locking piece with respect to the gap. Can be easily and reliably moved.

  According to a sixth characteristic configuration of the present invention, the locking piece is constituted by a plate-like plate-like locking piece that is formed to project from one side surface in the thickness direction of the main body base toward the thickness direction, The distance restricting portion is formed so as to protrude from a position deviated from the other side surface opposite to the one side surface and a position where the plate-like locking piece is formed.

According to the above configuration, since the locking piece is constituted by the plate-like plate-shaped locking piece that is formed to project from the one side surface in the thickness direction of the main body base toward the thickness direction, the inner periphery of the bolt insertion hole When a plate-shaped locking piece is inserted into a substantially arcuate gap formed between the surface and the outer peripheral surface of the bolt, even if the plate-shaped locking piece tries to detach from the gap due to its own weight, the bolt shaft core Movement in a direction other than the direction along the direction is surely regulated by contact between the plate-like locking piece, the bolt insertion hole, and the bolt. Therefore, it is possible to better prevent the temporary fixing spacer from being detached from between the joint body and the press ring.
In addition, since the interval restricting portion is formed so as to protrude from a position on the other side opposite to the one side in the thickness direction of the main body base and deviated from the position where the plate-like locking piece is formed, While inserting the gap into the gap, the gap restricting portion can be prevented from coming into contact with the connecting portion around the gap, and the temporary fixing spacer is rotated along the inner peripheral surface of the bolt insertion hole to By adopting a temporary fixing posture in which the position of the joint body and the press ring is positioned at the interval restriction position between the opposing surfaces, the gap between the joint main body and the press ring can be reliably maintained at a predetermined temporary stop interval.

  According to a seventh characteristic configuration of the present invention, the spacing regulating portion is a radial direction of the inner peripheral surface with respect to the locking piece that rotates along the inner peripheral surface of the bolt insertion hole of the push ring or the joint body. It is in the point comprised so that it may be located in an outward position.

  According to the above-described configuration, the interval restricting portion is located at the radially outer position of the inner peripheral surface with respect to the locking piece that rotates along the inner peripheral surface of the bolt insertion hole of the press wheel or the joint body. When the piece is rotated along the inner peripheral surface, the interval restricting portion can be surely positioned at the interval restricting position on one side in the rotation direction, and is separated from the interval restricting position on the other side in the rotation direction. It can be reliably moved to the position. That is, by rotating the temporary fixing spacer, the temporary fixing spacer can be reliably changed into the temporary fixing posture and the interval restriction releasing posture.

  According to an eighth characteristic configuration of the present invention, an abutment surface that abuts on any one of the opposed surfaces of the pusher wheel and the joint body in the spacing regulating portion is an inner periphery of a bolt insertion hole of the pusher wheel or the joint body. In the rotation direction of the locking piece that rotates along the surface, the taper surface is formed by a tapered surface formed in the interval restriction portion that increases in thickness as it moves away from the interval restriction position.

  According to the above-described configuration, the space regulation portion where the contact surface of the space regulation portion that is in contact with either the joint body or the push wheel becomes thicker toward the position where the contact piece moves away from the space regulation position in the rotation direction of the locking piece. Because the tapered surface is formed on the part, in the state where the distance restricting part is sandwiched between the opposing surfaces of the joint body and the press ring, only the part of the tapered surface that is biased to the position away from the distance restricting position is the joint body. Or it will contact | abut with a press ring. Therefore, the gripping portion can be gripped and the interval restricting portion can be easily rotated with a smaller force in a direction in which the interval restricting portion is separated from the interval restricting position in the rotation direction of the locking piece. The posture can be changed more easily to the interval restriction release posture.

  A ninth characteristic configuration according to the present invention is that a finger hooking hole is formed in the grip portion.

  According to the above configuration, since the finger-holding hole is formed in the grip portion, the operator can easily put the finger on the finger-holding hole and rotate the locking piece along the inner peripheral surface. The posture change from the temporarily fixed posture of the spacer to the interval restriction release posture can be performed more easily.

  A tenth characteristic configuration according to the present invention is that the distance regulating portion and the main body base are formed with the same thickness.

  According to the above configuration, the interval restricting portion and the main body base are formed with the same thickness, that is, the interval restricting portion and the main body base are configured to be combined, and it is necessary to provide the interval restricting portion separately from the main body base. Therefore, the shape of the temporary fixing spacer can be simplified.

  An eleventh characteristic configuration of the present invention for achieving the above object is that it is a temporary fixing spacer used in the pipe joint according to any one of the above characteristic configurations.

  According to the said structure, the spacer for temporary fixing which can show | play the above advantageous effects can be obtained by using for a pipe joint.

A twelfth characteristic configuration of the present invention for achieving the above object is a method of assembling a pipe joint according to any of the above characteristic configurations,
The ring packing, the lock ring, and the push ring are placed on the joint body in this order, and the nut is screwed and tightened with the bolt inserted into the bolt insertion hole of the push ring and the joint body. A step of setting the joint body and the press ring to a first temporarily fixed state;
In the first temporary fixing state, the locking piece of the temporary fixing spacer is inserted into the gap formed between the inner peripheral surface of the bolt insertion hole of the push ring or the joint body and the outer peripheral surface of the bolt. Then, while rotating the locking piece along the inner peripheral surface, the interval restricting portion of the temporary fixing spacer is positioned at an interval restricting position between the push wheel and the joint body, and the temporary fixing A step of setting the spacer to the temporary fixing posture;
The step of further tightening the bolts and nuts to place the joint body and the press ring in a second temporarily fixed state is performed in order.

  According to this configuration, the temporary fixing spacer capable of maintaining the interval between the press ring and the joint main body at a predetermined temporary fixing interval is previously set in a factory or the like with the lock ring, the ring packing, etc. in an intended arrangement state. Once installed, the joint body and push ring can be temporarily assembled with the bolts and nuts (the second temporarily fixed state), and it is possible to prevent the fastening state of the bolts and nuts from changing during transportation. The lock ring, ring packing, etc. can be maintained in the desired arrangement state.

That is, first, the ring packing, the lock ring, and the press ring are placed in this order on the joint body, and the nut is screwed and tightened with the bolt inserted into the bolt insertion hole of the press ring and the joint body. The joint body and the press ring are in the first temporarily fixed state, and then the holding portion of the temporary fixing spacer is held, and the locking piece is formed between the inner peripheral surface of the bolt insertion hole and the outer peripheral surface of the bolt. The gap regulating portion is positioned at the gap regulating position between the opposed surfaces of the pusher wheel and the joint body by inserting the locking piece from the bolt axis direction and rotating the locking piece along the inner peripheral surface. It can be a temporarily fixed posture. Then, by further tightening the bolts and nuts in this temporary fixing posture, the interval regulating portion is held between the facing surfaces of the press ring and the joint body, and the interval between the joint body and the press ring is set at a predetermined temporary fixing interval. (The second temporarily fixed state).
Therefore, after gripping a gripping part that can be easily gripped, and inserting the locking piece into the gap formed between the inner peripheral surface of the pusher wheel or the bolt insertion hole of the joint body and the outer peripheral surface of the bolt With the simple operation of rotating the locking piece along the inner peripheral surface until the interval restricting portion is positioned at the interval restricting position, the temporarily fixing spacer can be in the temporarily fixing posture. While having a very simple construction, it is possible to reliably maintain the temporary fixing state (the second temporary fixing state) in which the distance between the joint body and the press ring is maintained at a predetermined interval. Etc. can be maintained in the intended arrangement.

In a thirteenth feature configuration according to the present invention, in the second temporary fixing state, a step of inserting a joining pipe into the joint body via the push ring;
The locking piece of the temporary fixing spacer in the temporary fixing posture is rotated along the inner peripheral surface of the bolt insertion hole of the push wheel or the joint body in the direction opposite to the rotational direction of the temporary fixing posture. And the step of positioning the interval restricting portion of the temporary fixing spacer at a position disengaged from the interval restricting position between the push wheel and the joint main body, and setting the temporary fixing spacer to the interval restricting release posture. When,
The locking piece in the temporary fixing spacer in the spacing restriction release posture is separated from the gap formed between the inner peripheral surface of the bolt insertion hole of the push ring or the joint body and the outer peripheral surface of the bolt, Removing the temporary fixing spacer from the joint body and the push ring;
The step of further tightening the bolt and nut, and finally tightening the joint body and the press ring is executed.

According to this configuration, when the temporary fixing spacer is removed from between the joint main body and the press ring, the joint main body and the press ring are finally tightened, and the joining pipe is joined, first, in the second temporary fixing state, The person inserts the joining pipe into the joint body through the pusher wheel, and grips the gripping portion so that the locking piece inserted into the gap is placed along the inner peripheral surface of the bolt insertion hole and temporarily fixed. By rotating in the direction opposite to the rotation direction of the step, the spacing regulating portion is positioned at a position separated radially outward from the spacing regulating position (temporary fastening posture) between the facing surfaces of the pusher wheel and the joint body. The posture can be easily changed to the interval restriction release posture. At this time, in particular, even when the joint body and the press ring are firmly tightened by the bolts and nuts, and the interval restricting portion is firmly sandwiched between the joint body and the press ring, the temporary fixing spacer is rotated. Therefore, it becomes easy to apply a force to the temporary fixing spacer, and the posture can be easily changed even when the construction pit is a relatively narrow space. And in this space | interval regulation release attitude | position, the spacer for temporary fixing can be removed by detaching | releasing a locking piece from the said clearance gap, and a coupling main body and a press ring can be finally tightened by tightening a bolt and a nut. .
As a result, the gripping portion that can be easily gripped is gripped, and the locking piece is rotated along the inner peripheral surface of the bolt insertion hole until the spacing regulating portion is located at a position separated from the spacing regulating position. With a simple and easy-to-use operation, the temporary fixing spacer can be easily changed to the clearance restriction release posture, and the temporary fixing spacer removal operation can be performed easily and reliably with a very simple configuration. Can be executed.

Partially cutaway cross-sectional view showing the overall configuration of the pipe joint according to the first embodiment The perspective view which shows the structure of the spacer for temporary fixing which concerns on 1st Embodiment. The side view which shows the structure of the spacer for temporary fix | stop concerning 1st Embodiment Partially exploded perspective view of pipe fitting Partially cutaway sectional view of a pipe joint in the temporarily fixed state The perspective view which shows the pipe joint in a temporary fix | stop state Explanatory drawing explaining the removal operation of the spacer for temporary fixing Explanatory drawing explaining the removal operation of the spacer for temporary fixing Partially cutaway sectional view showing the pipe joint in the final tightened state The perspective view which shows the pipe joint in the temporary fix | stop state which concerns on 2nd Embodiment. The perspective view which shows the structure of the spacer for temporary fixing which concerns on 2nd Embodiment. Partially cutaway sectional view of a pipe joint in the temporarily fixed state Explanatory drawing explaining the removal operation of the spacer for temporary fixing Explanatory drawing explaining the removal operation of the spacer for temporary fixing Partially cutaway sectional view showing the pipe joint in the final tightened state

[First Embodiment]
Hereinafter, a method of assembling the pipe joint J according to the present invention, the temporary fixing spacer S used for the pipe joint J, and the pipe joint J will be described with reference to the drawings.

  As shown in FIG. 1, the pipe joint J according to the present invention joins a water pipe P (an example of a fluid pipe and a joint pipe) to be joined in a state of being watertight and preventing the pipe joint J from coming out. Equipment. In the present embodiment, an example of joining a pair of water pipes P inserted from both sides of the joint body 1 of the pipe joint J will be described. However, for convenience of explanation, one water pipe P is mainly provided on one side of the joint body 1. The structure inserted and joined from below will be described. The water pipe P is not particularly limited to a material such as a polyvinyl chloride pipe, a polyethylene pipe, a steel pipe, and a stainless steel pipe, but in this embodiment, an example using a straight tubular PVC pipe will be described.

  The pipe joint J includes a joint main body 1 provided with a packing housing portion 2 whose diameter is expanded toward the receiving end 1 </ b> A on the inner peripheral surface, a ring packing 3 housed in the packing housing portion 2, and relative to the joint main body 1. A pusher wheel 10 that compresses the ring packing 3 as it moves closer, a lock ring 12 that is housed in a lock ring housing part 11 formed on the inner peripheral surface of the pusher wheel 10, and a pusher side connecting part 13 of the pusher wheel 10. An example of a connecting part) and a bolt 8 and a nut 9 that connect a main body side connecting part 4 of the joint body 1 (an example of a joint part of the joint body), a bolt 8 and a nut 9 And a diameter reduction guiding means Q for reducing the diameter of the lock ring 12 in accordance with the relative proximity movement of the pusher wheel 10 and the joint body 1 by the tightening operation of

The pipe joint J is between the ring packing 3 housed in the packing housing part 2 and the lock ring 12 housed in the lock ring housing part 11 in the direction along the axis X of the joint body 1, and An annular piece 14 is provided between the outer peripheral surface of the lock ring 12 and the lock ring accommodating portion 11 in the radial direction of the joint body 1.
Furthermore, as shown in FIGS. 2 to 5, the pipe joint J includes a temporary fixing spacer S that can maintain a predetermined temporary fixing interval A between the pusher wheel 10 and the joint body 1.

As shown in FIG. 1, the joint body 1 is formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the water pipe P to be joined, and is slightly reduced in diameter from the center toward both ends. Cylindrical portion 1B, packing accommodating portion 2 that expands radially outward on the inner peripheral surfaces of both end sides (receiving end portion 1A side) of cylindrical portion 1B, and outer peripheries at both ends where packing accommodating portion 2 is formed And a main body side connecting portion 4 that protrudes radially outward from the surface.
In the present embodiment, the joint main body 1 uses ductile cast iron, but may be made of stainless steel, resin, or the like.

As shown in FIGS. 1 and 4, the main body side connecting portion 4 is formed so as to protrude from the both ends of the cylindrical portion 1B at two locations in the circumferential direction, and two main body side connecting portions formed on one side of the cylindrical portion 1B. The portions 4 are formed at positions that are symmetrical with respect to the axis X of the joint body 1.
The main body side connecting portion 4 is formed with a main body side insertion hole 5 (an example of a bolt insertion hole of the joint main body 1) through which a bolt 8 (T-head bolt in this embodiment) can be inserted.

As shown in FIG. 5, the ring packing 3 includes an inner peripheral surface having an inner diameter slightly larger than the outer diameter of the water pipe P to be joined in an uncompressed state, and the inner diameter of the inner peripheral surface of the packing housing portion 2. Is formed in an annular shape having an outer peripheral surface of substantially the same outer diameter as that of the ring packing 3, and a notch groove 3 a having an outer diameter smaller than the inner diameter of the packing housing portion 2 is formed on the outer peripheral surface at the center of the ring packing 3. It is formed to have a substantially rounded U shape.
In the present embodiment, the ring packing 3 uses styrene butadiene rubber (SBR), but can also be made of an elastic body such as synthetic rubber.

As shown in FIGS. 1, 4, and 5, the pusher wheel 10 is formed in an annular shape having an inner diameter slightly larger than the outer diameter of the water pipe P to be joined. On the inner peripheral surface of the mouth end portion 10A), a lock ring accommodating portion 11 that expands radially outward is formed, and is formed to project radially outward from an outer peripheral surface on one end side where the lock ring accommodating portion 11 is formed. A push wheel side connecting portion 13 and an opening 15 into which the water pipe P can be inserted are provided on the other end side.
In the present embodiment, the pusher wheel 10 uses ductile cast iron, but may be made of stainless steel, resin, or the like.

The presser wheel side connecting portion 13 is formed so as to protrude at two locations in the circumferential direction so as to correspond to the portion where the main body side connecting portion 4 of the joint main body 1 is formed on one end side of the presser wheel 10. Are formed at symmetrical positions.
A pusher wheel side insertion hole 16 (an example of a bolt insertion hole of the pusher wheel 10) through which the bolt 8 can be inserted is formed through the pusher wheel side coupling portion 13.

  As shown in FIGS. 5 and 7, in a state where the bolt 8 is inserted through the main body side insertion hole 5 and the press ring side insertion hole 16, the outer peripheral surface of the bolt 8 and the main body side insertion hole 5 and the press ring side insertion hole 16 A gap C is formed between the peripheral surface. For example, when the diameter of the shaft portion of the bolt 8 is 16 mm, the main body side insertion hole 5 is about 19 mm, and the width of the gap 8 in the radial direction of the bolt 8 is about average in the circumferential direction. It is about 1.5 mm.

As shown in FIG. 5, the piece 14 includes an inner peripheral surface having an inner diameter slightly larger than the outer diameter of the water pipe P to be joined in an uncompressed state, and the inner diameter of the inner peripheral surface of the lock ring housing portion 11. Is formed in an annular shape having an outer peripheral surface of substantially the same outer diameter as that of the ring packing 3, and an annular pressing portion 14 a protruding toward the ring packing 3 is formed on one end side adjacent to the ring packing 3. A circumferential groove 14b having a diameter larger than that of the inner circumferential surface is formed on the inner circumferential surface on the other end side opposite to the inner circumferential surface, and the lock ring 12 can be accommodated in the circumferential groove 14b. .
In this embodiment, the piece 14 is made of polypropylene (PP), but may be made of stainless steel, resin, or the like.

As shown in FIG. 5, the lock ring 12 has an inner diameter that is slightly larger than the outer diameter of the water pipe P to be joined in an uncompressed state, and is slightly larger than the inner diameter of the circumferential groove 14 b of the piece 14. A split shape (C shape) with an outer peripheral surface of the outer diameter is configured to be able to reduce the diameter by elastic deformation, and the inner peripheral surface is provided with a blade 12a that can bite into the outer peripheral surface of the water pipe P I have.
In this embodiment, the lock ring 12 is made of stainless steel, but may be made of resin, metal, or the like.

When the pipe joint J configured as described above is used, the ring packing 3, the piece 14, the lock ring 12, and the push ring 10 are arranged in this order on the joint main body 1, and bolts are inserted into the main body side insertion hole 5 and the push ring side insertion hole 16. The nut 9 is screwed and attached while the bolt 8 is inserted, and the bolt 8 and the nut 9 are tightened to move the pusher wheel 10 relatively close to the joint body 1, so that the pusher wheel side connecting portion 13 and the main body side connecting portion 4. Are in contact with each other (see FIGS. 1 and 9). At this time, with the tightening operation of the bolt 8 and the nut 9, the inner peripheral surface of the lock ring housing portion 11 of the press ring 10 compresses the outer peripheral surface of the piece 14, the side that compresses the ring packing 3, and the lock ring 12. The diameter of the lock ring 12 is reduced by the circumferential groove 14b of the piece 14 and the blade 12a formed on the inner peripheral surface of the lock ring 12 is bitten into the outer peripheral surface of the water pipe P. The ring packing 3 can be compressed in the packing housing portion 2 by the pressing portion 14 a of the piece 14, and the ring packing 3 can be brought into close contact with the outer peripheral surface of the water pipe P. In this way, the joint body 1 and the push ring 10 can be coupled in the final tightened state by tightening the bolt 8 and the nut 9 using the pipe joint J.
Therefore, in this embodiment, the lock ring accommodating portion 11 and the piece 14 reduce the diameter of the lock ring 12 in accordance with the relative proximity movement of the pusher wheel 10 and the joint body 1 by the tightening operation of the bolt 8 and the nut 9. It functions as the guiding means Q.

Next, a configuration for setting the joint body 1 and the press wheel 10 to the final fastening state using the pipe joint J as described above will be described as a temporary fastening state (second temporary fastening state described later).
As shown in FIGS. 5 and 6, in the temporarily fixed state (second temporary fixed state described later), the ring packing 3, the piece 14, and the lock ring 12 are arranged as expected between the joint body 1 and the press wheel 10. In this state, the bolt 8 and the nut 9 are tightened, and the space between the joint body 1 and the press ring 10 is maintained at a predetermined temporary fixing interval A by the temporary fixing spacer S. In this state, the joint body 1 and the push ring 10 are pressed so that the relative positional relationship of the ring packing 3, the piece 14 and the lock ring 12 does not change, and the ring packing 3, the piece 14 and the lock ring 12 are not substantially deformed. Thus, the tightening operation of the bolt 8 and the nut 9 is performed.

The temporary fixing spacer S provided in the pipe joint J is configured so that the interval between the push ring 10 and the joint body 1 can be maintained at a predetermined temporary fixing interval A (see FIG. 5).
In this embodiment, the temporary fixing spacer S is made of polypropylene (PP), but may be made of resin, metal, or the like.

  As shown in FIGS. 2, 3, 7, and 8, the temporary fixing spacer S is formed with a predetermined thickness and has a flat side surface 20 </ b> A and another side surface 20 </ b> B on both sides in the thickness direction. The main body base 20 includes a base 20, and at least a part of the main body base 20 protrudes radially outward from the presser wheel side connecting portion 13 of the pusher wheel 10 and the main body side connecting portion 4 of the joint main body 1 (see FIG. 7). ), The spacing regulating portion 22 sandwiched between the facing surfaces 1a and 10a of the pusher wheel 10 and the joint body 1 (see FIGS. 5 and 6), and the pusher wheel side insertion formed in the pusher wheel side coupling portion 13 of the pusher wheel 10. A bolt shaft with respect to a gap C formed between the inner peripheral surface of the hole 16 or the inner peripheral surface of the main body side insertion hole 5 formed in the main body side connecting portion 4 of the joint main body 1 and the outer peripheral surface of the bolt 8. A locking piece 23 that can be inserted from the core direction is provided.

Finger gripping holes 21A that are formed through the thickness direction of the main body base 20 are formed in the gripping portion 21, and an operator hooks a finger inserted through the finger gripping hole 21A onto the outer peripheral edge portion 21B of the finger gripping hole 21A. The temporary fixing spacer S can be easily operated.
As shown in FIG. 7, the finger-holding hole 21 </ b> A as the gripping part 21 and a part of the outer peripheral edge part 21 </ b> B are in a state where the locking piece 23 of the temporary fixing spacer S is inserted into the gap C, In any state that rotates along the inner peripheral surface of the push-wheel-side insertion hole 16, the push-wheel-side connecting portion 13 and the main body-side connecting portion 4 protrude outward in the radial direction.

As shown in FIGS. 2, 3, 7, and 8, the locking piece 23 is formed in a plate shape protruding from the outer edge portion 20 a of one side surface 20 </ b> A in the thickness direction of the main body base portion 20 toward the thickness direction. It is comprised by the plate-shaped latching piece 23a. That is, the plate-like locking piece 23a is formed so as to protrude in the thickness direction from one portion of the outer peripheral edge portion 21B of the finger hooking hole 21A on one side surface 20A of the main body base portion 20.
Moreover, the protrusion length from the main body base part 20 of the plate-shaped locking piece 23a is formed shorter than the thickness of the push wheel side connection part 13 and the main body side connection part 4 (refer FIG. 5), and the plate-shaped locking piece 23a of FIG. The thickness is slightly smaller than the gap C described above (see FIG. 7), and is set to about 1 mm in this embodiment. Accordingly, the temporary fastening spacer S rotates along the inner peripheral surface of the pusher wheel side insertion hole 16 of the pusher wheel 10 or the main body side insertion hole 5 of the joint body 1 with the plate-like locking piece 23a inserted in the gap C. It is configured to be able to.

The space regulating portion 22 is biased with respect to the formation side of the plate-like locking piece 23a on the other side surface 20B opposite to the one side surface 20A of the main body base 20 from which the plate-like locking piece 23a is projected. Projected from the position. In other words, the space restricting portion 22 is located on the other side surface 20B of the main body base 20 at a position shifted by about 90 degrees with respect to the position where the plate-like locking piece 23a is projected at the central angle of the finger hooking hole 21A. It protrudes from one outer peripheral edge 21B of 21A).
Moreover, the protrusion length from the main body base 20 of the space | interval control part 22 is when the total length with the thickness (length) of the main body base 20 is set to the temporary fix state (2nd temporary fix state) mentioned later. The length is set to be equal to a predetermined temporary fixing interval A (distance between the facing surfaces 1a and 10a) between the press wheel 10 and the joint body 1.

  Accordingly, the temporary fastening spacer S rotates along the inner peripheral surface of the pusher wheel side insertion hole 16 of the pusher wheel 10 or the main body side insertion hole 5 of the joint body 1 with the plate-like locking piece 23a inserted in the gap C. By doing so, the temporary restricting posture in which the interval restricting portion 22 is located at the interval restricting position between the facing surfaces 1a and 10a of the push wheel 10 and the joint body 1 (see FIGS. 6, 7A, and 8A). And the interval restriction | limiting part 22 is comprised so that an attitude | position change is freely possible to the space | interval regulation cancellation | release attitude | position (refer FIG.7 (b) and FIG.8 (b)) which left | separated from the space | gap regulation position. In addition, the surface of the main body base 20 adjacent to the outer peripheral surface of the ring packing 3 and the piece 14 disposed between the joint main body 1 and the press ring 10 in the temporary fixing posture is a curved surface 22a having a shape corresponding to the outer peripheral surface. When the plate-like locking piece 23a rotates along the inner peripheral surface of the pusher wheel side insertion hole 16 or the main body side insertion hole 5, the curved surface 22a and the outer peripheral surface of the ring packing 3 or piece 14 come into contact with each other. Thereby, it is comprised so that the space | interval control part 22 can be reliably located in a space | interval control position.

  Here, since the thickness of the main body base portion 20 is formed to be thinner than the thickness of the interval restricting portion 22 by a dimension corresponding to the insertion / extraction movement allowance of the plate-like locking piece 23a, An attachment / detachment operation space V that allows the plate-like locking piece 23a to be inserted and removed in the bolt axis direction with respect to the gap C is formed between the opposing surfaces 1a, 10a of the main body base 20 of the spacer S and the presser wheel 10 or the joint main body 1. (See FIG. 2, FIG. 3, FIG. 5, FIG. 6 and FIG. 8 (b)).

  Further, as shown in FIGS. 2, 3, and 5 to 8, the interval restricting portion 22 rotates along the inner peripheral surface of the pusher wheel side insertion hole 16 of the pusher wheel 10 or the main body side insertion hole 5 of the joint body 1. It is comprised so that it may be located in the radial direction outer position of the said internal peripheral surface with respect to the plate-shaped latching piece 23a to perform, and the opposing surfaces 1a and 10a of the push ring 10 and the coupling main body 1 in the space | interval control part 22 are comprised. The spacing regulating portion whose thickness increases as the abutting surface that abuts any one of them moves away from the spacing regulating position in the rotational direction of the plate-like locking piece 23a that rotates along the inner peripheral surface. It is comprised by the taper surface 22b formed in this. The inclination of the taper surface 22b is sandwiched between the opposing surfaces 1a and 10a of the joint body 1 and the press wheel 10 in a state where the interval restricting portion 22 is located at the interval restricting position, and the interval between the opposing surfaces 1a and 10a is predetermined. Is set to an inclination angle that can be maintained at the temporary fixing interval A.

  Next, the temporary fixing spacer S having the above-described configuration is used for the pipe joint J to be in a temporary fixing state (second temporary fixing state), and then the temporary fixing spacer S is removed and the water pipe P is joined. Therefore, a method for assembling the pipe joint J will be described.

  First, as shown in FIG. 4, one end side of both ends (receiving end portion 1A) of the joint body 1 is placed on the ground or the like, and then the other end side (receiving end portion 1A) of the joint body 1. The ring packing 3, the piece 14, and the lock ring 12 are mounted thereon, and the position of the pusher wheel side insertion hole 16 of the pusher wheel side connecting part 13 of the pusher wheel 10 in the circumferential direction is set to the main body side connecting part 4 of the joint body 1. The push wheel 10 is placed in a state where it matches the position of the main body side insertion hole 5. Then, the nut 9 is screwed and tightened in a state where the bolt 8 is inserted through the main body side insertion hole 5 and the push wheel side insertion hole 16. This tightening operation only needs to be lightly tightened so that the joint body 1 and the push ring 10 are not separated even if the operator does not support them. This step is a step of bringing the joint body 1 and the press wheel 10 into the first temporarily fixed state.

  Next, as shown in FIGS. 4 to 8, in the first temporary fixing state, the holding portion 21 of the temporary fixing spacer S is held, and the main body base portion 20 of the temporary fixing spacer S and the interval regulating portion 22 are While the detachment operation space V (see FIGS. 5 and 8) formed by the difference in thickness is moved in the radial direction of the bolt 8 so as to be close to or overlap the push wheel side coupling portion 13 (see FIG. 8C), The stopper spacer S is moved in the direction of the bolt axis, and the plate-like locking piece 23a is inserted into a gap C formed between the inner peripheral surface of the main body side insertion hole 5 of the joint body 1 and the outer peripheral surface of the bolt. (See FIG. 7 (b) and FIG. 8 (b)). Then, while rotating the plate-like locking piece 23 a along the inner peripheral surface of the main body side insertion hole 5, the curved surface 22 a of the main body base 20 is brought into contact with or close to the outer peripheral surface of the ring packing 3 or the piece 14, The restricting portion 22 is positioned at a distance restricting position between the facing surfaces 1a and 10a of the pusher wheel 10 and the joint body 1, and the temporarily fixing spacer S is in a temporarily fixed posture (see FIGS. 7B and 8B). From the state, the state is as shown in FIGS. 7A and 8A). This process is a process of setting the temporary fixing spacer S to the temporary fixing posture.

  Here, in the state in which the temporary fixing spacer S is in the temporary fixing posture, the plate-like locking piece 23a is inserted into the gap C, and a part of one side surface 20A of the main body base 20 is a facing surface of the joint main body 1. Although it is in a state of being placed on 1a, in addition to being configured so that the center of gravity of the temporary fixing spacer S exists in the part, the plate-like locking piece 23a is inserted into the gap C. This also prevents the temporary fixing spacer S from being detached from the temporary fixing posture (see FIGS. 7A and 8A). That is, it is possible for the operator to sequentially perform subsequent steps using both hands freely without supporting the temporary fixing spacer S with hands or the like.

Subsequently, as shown in FIGS. 5 and 6, the bolt 8 and the nut 9 are further tightened in a state where the temporary fixing spacer S is in the temporary fixing posture, so that the joint body 1 and the presser wheel 10 are connected to the second temporary holding spacer 10. Stop state. In this tightening operation, the space restricting portion 22 is tightened to some extent so as to be in contact with and sandwiched between the opposing surfaces 1a and 10a of the joint body 1 and the press wheel 10. Therefore, in the second temporarily fixed state, the space is restricted. The restricting portion 22 is in contact with and sandwiched between the facing surfaces 1a and 10a of the joint body 1 and the push wheel 10, and the facing surfaces 1a and 10a are maintained at a predetermined temporary fixing interval A. The ring packing 3, the piece 14, and the lock ring 12 are satisfactorily maintained by the 1 and the push ring 10 so as to be in an intended arrangement state. This step is a step of bringing the joint body 1 and the push wheel 10 into the second temporarily fixed state.
In the drawing, only one temporary fixing spacer S is shown, but actually, a gap C formed by a plurality of main body side insertion holes 5 and push ring side insertion holes 16 formed in the circumferential direction. Corresponding to the number, a plurality of temporary fixing spacers S are attached in the circumferential direction, and the interval between the facing surfaces 1a and 10a of the joint body 1 and the push ring 10 is reliably maintained at a predetermined temporary fixing interval A in the circumferential direction. It is supposed to be configured.

As a result, the gripping portion 21 that can be easily gripped by the operator is gripped, and the plate-like locking piece 23 a is connected to the inner peripheral surface of the main body side insertion hole 5 of the joint main body 1 and the outer peripheral surface of the bolt 8. After inserting into the gap C formed between them, a temporary fixing spacer can be obtained by a simple operation of rotating the plate-like locking piece 23a along the inner peripheral surface until the interval restricting portion 22 is located at the interval restricting position. S can be in a temporarily fixed posture, and the space between the joint body 1 and the press ring 10 can be increased by tightening the bolt 8 and the nut 9 while making the mounting operation of the temporary fixing spacer S very simple. The temporary fixing state (second temporary fixing state) maintained at the predetermined temporary fixing interval A can be reliably maintained.
Therefore, after the lock ring 12, the ring packing 3, and the like are disposed in a factory or the like in advance, the joint body 1 and the press ring 10 can be temporarily assembled with the bolt 8 and the nut 9. It is possible to satisfactorily prevent the fastening state of the bolt 8 and the nut 9 from being changed during transportation and to maintain the lock ring 12, the ring packing 3 and the like in a desired arrangement state.

  Next, when bringing the pipe joint J into the construction site and joining the water pipe P, the pipe joint J in the second temporarily fixed state is connected to the water pipe 1 in the joint body 1 through the opening 15 of the press ring 10. Insert tube P. This step is a step of inserting the water pipe P into the joint body 1. At this time, since the inner diameter of the ring packing 3 is formed to be slightly larger than the outer diameter of the water pipe P, the ring packing 3 is not pulled in as the water pipe P is inserted, and the ring packing 3 Is well maintained in the desired arrangement.

  Then, the state shown in FIGS. 7 (a) and 8 (a) is changed to the state shown in FIGS. 7 (b) and 8 (b). The plate-like locking piece 23a of the temporary fixing spacer S (the plate-like locking piece 23a inserted in the gap C) is placed along the inner peripheral surface of the body-side insertion hole 5 of the joint body 1 and temporarily fixed. Rotating in the direction opposite to the rotation direction of the step (arrow direction in FIG. 7B), the spacing regulating portion 22 is detached from the spacing regulating position between the facing surfaces 1a, 10a of the pusher wheel 10 and the joint body 1. The posture is changed to the interval restriction release posture that is positioned at the position (see FIG. 7B and FIG. 8B). This step is a step of setting the temporary fixing spacer S to the interval restriction release posture. In the temporary fixing posture, the tapered surface 22b of the spacing regulating portion 22 is in contact with the facing surface 10a of the push wheel 10. However, the joint main body or the joint body or the tapered surface 22b is biased to the position away from the spacing regulating position. Since it is in contact with the pusher wheel, it can be easily rotated with a smaller force.

  Subsequently, the plate-like locking piece in the temporary fixing spacer S so as to change from the state shown in FIGS. 7B and 8B to the state shown in FIG. 23a is moved in the direction of the bolt shaft core so that the detachment operation space V formed by the difference in thickness between the main body base 20 and the space regulating portion 22 is close to or overlaps the pusher wheel side coupling portion 13. The stop piece 23a is removed from the gap C, and the temporary fixing spacer S is removed from the joint body 1 and the push ring 10. This step is a step of removing the temporary fixing spacer S from the joint body 1 and the push wheel 10.

  As shown in FIGS. 1 and 9, after removing the temporary fixing spacer S, the bolt 8 and the nut 9 are further tightened, and the joint body 1 and the press ring 10 are finally tightened. This step is a step of finally fastening the joint body 1 and the press wheel 10 together. In this final tightening step, as described above, the blade 12a formed on the inner peripheral surface of the lock ring 12 can bite into the outer peripheral surface of the water pipe P, and the ring packing 3 can be brought into close contact with the outer peripheral surface of the water pipe P. The water pipe P can be joined in a watertight state, and the water pipe P can be well prevented from coming out of the joint body 1 and the push ring 10.

Thus, when the temporary fixing spacer S is removed from between the joint body 1 and the pusher wheel 10 and the joint body 1 and the pusher wheel 10 are finally tightened with the bolts 8 and nuts 9, the gripping portion 21 is gripped. By rotating the plate-like locking piece 23 a inserted into the gap C along the inner peripheral surface of the main body side insertion hole 5, the spacing restricting portion 22 is made to face the push wheels 10 and the joint main body 1 facing surfaces 1 a and 10 a. It is possible to easily change the posture from the interval restriction position (temporarily fixed posture) between the positions to the position where the interval restriction is released at a position disengaged radially outward. At this time, in particular, even when the joint body 1 and the press ring 10 are firmly tightened by the bolts 8 and the nuts 9 and the interval restricting portion 22 is firmly sandwiched between the joint body 1 and the press ring 10, Since the construction spacer S is rotated, the operator can easily apply a force to the temporary fastening spacer S, and the posture can be easily changed even when the construction pit is a relatively narrow space. And in this space | interval regulation release attitude | position, the spacer S for temporary fixing can be removed by detaching | releasing the plate-shaped locking piece 23a from the said clearance gap C, and the joint body 1 and the bolt 8 and the nut 9 are tightened. The press ring 10 can be finally tightened.
As a result, the gripping portion 21 that can be easily gripped is gripped, and the plate-like locking piece 23a is moved to the inner periphery of the main body side insertion hole 5 until the spacing regulating portion 22 is located at a position separated from the spacing regulating position. The temporary fixing spacer S can be easily changed to the clearance restriction release posture by a simple and easy-to-use operation of rotating along the surface, and the temporary fixing spacer S can be easily removed. With a simple configuration, it can be executed easily and reliably.

[Second Embodiment]
In the said 1st Embodiment, although it was set as the structure which protrudes and forms the space | interval control part 22 from the other side surface 20B of the main body base part 20 as the spacer S for temporary fixing, it is between the opposing surfaces 1a and 10a of the coupling main body 1 and the press ring 10. As long as it can maintain the predetermined temporary fixing interval and can easily insert and remove the locking piece 23 with respect to the gap C, an interval restricting portion having another configuration can be adopted.

For example, as shown in FIG. 11, the interval restricting portion 30 is configured to have the same thickness as that of the main body base 20 of the temporary fixing spacer S, that is, the main body base 20 and the interval restricting portion 30 are combined. You can also. A plate-like locking piece 23a as a locking piece 23 is formed so as to protrude from the one side surface 20A of the main body base 20 in the thickness direction.
In this case, as shown in FIGS. 13 and 14, the temporary fixing spacer S has a temporary fixing posture (in which the interval restricting portion 30 is positioned at an interval restricting position between the opposing surfaces 1 a and 10 a of the joint body 1 and the press wheel 10. 13 (a) and 14 (a)) and an interval restriction release posture (see FIGS. 13 (b) and 14 (b)) located at a position separated from the interval restriction position. As shown in FIGS. 12 and 14, the pusher wheel 10 has a plate-like locking piece with respect to the gap C between the opposing surfaces of the temporary fixing spacer S in the clearance restriction release posture and the main body base 20. A recess 31 is formed that forms a detachable operation space V that allows the insertion and removal movement of the bolt 23a in the direction of the bolt axis. That is, the concave portion 31 is formed so as to protrude radially outward from the outer peripheral surface of the pusher wheel 10 at a position where the pusher wheel side coupling portion 13 of the pusher wheel 10 is retracted to the opening 15 side from the facing surface 10a of the pusher wheel 10. It is formed by being. Therefore, the gripping portion 21 of the temporary fixing spacer S is gripped, so that the main body base portion 20 is close to or overlaps with the attaching / detaching operation space V (see FIGS. 12 and 14) formed by the recessed portion 31 of the push wheel 10. While moving in the radial direction (see FIG. 14C), the temporary fixing spacer S is moved in the direction of the bolt axis, and the plate-like locking piece 23a is moved to the inner peripheral surface of the body-side insertion hole 5 of the joint body 1. Can be inserted into a gap C formed between the bolt and the outer peripheral surface of the bolt (see FIGS. 13B and 14B).
In addition, the main body side connection part 4 of the joint main body 1 and the pusher wheel side connection part 13 of the pusher wheel 10 are respectively arranged at four positions at corresponding positions in the circumferential direction. Moreover, the water pipe P is a straight tubular polyethylene pipe, and an annular incore 40 having an outer peripheral surface slightly smaller in diameter than the inner peripheral surface is inserted into the inner peripheral surface of the water pipe P from the opening end side. Are matched and reinforced. The lock ring 12 on the inner peripheral surface is an inner peripheral surface on which a large number of blades 12a are formed, and an outer peripheral surface having a shape corresponding to the shape of the inner peripheral surface of the lock ring accommodating portion 11, and the bolt 8 and When the pusher wheel 10 is moved relatively close to the joint body 1 by the tightening operation of the nut 9, the outer peripheral surface of the lock ring 12 is directly pressed in the reduced diameter direction by the inner peripheral surface of the lock ring housing portion 11. Twelve blades 12a bite into the outer peripheral surface of the water pipe P (see FIG. 15). Accordingly, the lock ring accommodating portion 11 functions as the diameter reducing means Q. The piece 14 for compressing the ring packing 3 in the packing accommodating portion 11 is divided into a first piece 14A disposed on the ring packing 3 side and a second piece 14B disposed on the lock ring 12 side. In the direction along the axis X of the joint body 1, it is disposed between the lock ring 12 and the ring packing 3. And the 2nd piece 14B is provided with the protrusion part (not shown) protruded and formed in the outer peripheral side in the circumferential direction several places, The said protrusion part respond | corresponds to this protrusion part of the 1st piece 14A. When the bolts 8 and nuts 9 are tightened and operated in a plurality of recesses formed at a plurality of locations in the circumferential direction, they contact the inner peripheral surface of the lock ring accommodating portion 11 of the pusher wheel 10 and The one piece 14A and the second piece 14B are integrally moved close to the ring packing 3, and the ring packing 3 is compressed by the pressing portion 14a formed on the first piece 14A.

Accordingly, the plate-like locking piece 23a can be easily inserted into and removed from the gap C, and the plate-like locking piece 23a is inserted into the gap C and the inner peripheral surface of the main body side insertion hole 5 or the push wheel side insertion hole 16 is inserted. The spacer S for temporary fixing can be configured to be freely changeable between a temporary fixing posture and an interval restriction releasing posture.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

[Another embodiment]
(1) In the above-described embodiment, a plurality of temporary fixing spacers S are used, and each locking piece 23 is inserted into each main body side insertion hole 5 formed in the circumferential direction. As long as it is a configuration that can maintain the distance to 10 at a predetermined temporary fixing interval A, it may be configured to be disposed only in the circumferential direction or only in the minimum necessary position. Further, the engaging piece 23 may be inserted into the pusher wheel side insertion hole 16 formed in the pusher wheel side connecting portion 13 of the pusher wheel 10 instead of being inserted through the main body side insertion hole 5.

(2) In the above-described embodiment, the ring packing 3, the lock ring 12, and the press ring 10 are mounted on the joint body 1. Conversely, the lock ring, the ring packing 3, and the joint body are mounted on the press ring 10. It is good also as a structure which mounts 1. Alternatively, the ring packing 3, the lock ring, the push ring 10, and the like may be attached and tightened with the bolt 8 and the nut 9 in a state where the shaft core X of the joint body 1 is aligned in the horizontal direction.

(3) In the above embodiment, the outer peripheral edge portion 21B of the finger hooking hole 21A of the gripping portion 21 is formed continuously in the circumferential direction, but it can withstand the work of rotating, attaching and removing the temporary fixing spacer S. If it is the structure provided with intensity | strength, a notch part can also be formed in the outer-periphery edge part 21B.

(4) In the above embodiment, when the detachment operation space V is formed, it is formed in the temporary fixing spacer S itself or the pusher wheel side connecting part 13 itself of the pusher wheel 10, but the locking piece 23 is provided in the gap C. The detachable operation space V can be omitted as long as it can be inserted and removed, and the detachable operation space V can be formed in the body-side connecting portion 4 itself of the joint body 1, or the temporary fixing spacer S and the pusher wheel 10. It is good also as a structure provided in at least one place of the push-wheel side connection part 13 and the main body side connection part 4 of the coupling main body 1.

(5) In the above embodiment, the case where the plate-like locking piece 23a is used as the locking piece 23 has been described. However, it can be inserted into and removed from the gap C and can be rotated along the inner peripheral surface of the bolt insertion hole. If it is a structure, other shape locking pieces, such as a bar-shaped locking piece, may be employed.

(6) In the above-described embodiment, the example in which the pusher wheel 10 is coupled to each of both ends of the joint body 1 and the pair of water pipes P is joined has been described. However, the pusher wheel 10 is coupled only to one end side of the joint body 1. The water pipe P is joined, and a coupling flange is formed on the other end of the joint body 1, and the water pipe P or the like provided with a coupling flange corresponding to the coupling flange is fastened by a fastener. Good. In this case, when the joint body 1 and the push wheel 10 are temporarily assembled, the temporary fixing spacer S can be used. In this case, the joint body 1 itself can also be constituted by a receiving pipe portion formed in the water pipe P.

(7) In the above embodiment, after the temporary fixing spacer S is set to the interval restriction release posture, the locking piece 23 is detached from the gap C, and the temporary fixing spacer S is removed from the joint body 1 and the push ring 10. As long as the joint body 1 and the push ring 10 can be securely tightened by tightening the bolts 8 and nuts 9, the temporary fixing spacer S is not removed. You can also. For example, the thickness of the part located between the opposing surfaces of the main body side connecting portion 4 and the pusher wheel side connecting portion 13 in the temporary fixing spacer S in the clearance restriction release state is set to the main body side connecting portion 4 and the presser wheel side connecting portion. 13 is formed so as to be thinner than the distance between the opposing surfaces, and the temporary fixing spacer S can be left between the joint body 1 and the pusher wheel 10 without being removed.

  As explained above, a temporary fixing spacer can be easily installed between the press ring and the joint body to achieve reliable temporary fixing, and the temporary fixing of the temporary fixing spacer can be reliably released with little effort. A temporary fitting spacer used for the pipe joint and a method for assembling the pipe joint can be provided.

1 Joint body 1a Opposing surface (joint body)
1A receiving end (joint body)
2 Packing accommodating part 3 Ring packing 4 Body side connecting part (joint body connecting part)
5 Body side insertion hole (Bolt insertion hole of joint body)
8 Bolt 9 Nut 10 Push ring 10a Opposite surface (push wheel)
10A receiving end (roller)
11 Lock ring housing (reduction guide)
12 Lock ring 13 Pusher side coupling part (Pushwheel coupling part)
16 Push Wheel Side Insertion Hole 20 Main Body Base 20A One Side 20B Other Side 20a Outer Edge 21 Grip Part 21A Finger Hook (Grip Part)
22 Space control part 22b Tapered surface (contact surface)
23 locking piece 23a plate-like locking piece (locking piece)
30 Spacing restriction part 31 Recess (desorption operation space)
A Temporary fixing interval C Clearance J Pipe joint P Water pipe (fluid pipe, joint pipe)
S Spacer Q for temporary fixing Reduction diameter guiding means V Desorption operation space

Claims (13)

A joint body provided with a packing housing portion that expands toward the receiving end on the inner peripheral surface, a ring packing housed in the packing housing portion, and the ring packing as the joint body moves relative to the joint body. A pressing ring that compresses, a lock ring that is accommodated in a lock ring accommodating portion formed on an inner peripheral surface of the pressing wheel, and a bolt and a nut that connect the coupling portion of the pushing wheel and the coupling portion of the joint body, A pipe joint in which the lock ring housing portion of the push ring is provided with a diameter reducing means for reducing the diameter of the lock ring in accordance with the relative proximity movement of the push ring and the joint body by the tightening operation of the bolt and the nut. Because
A temporary fixing spacer capable of maintaining the interval between the push wheel and the joint body at a predetermined temporary fixing interval;
The main body base portion of the temporary fixing spacer includes at least a part of the connecting portion of the press ring and a gripping portion that protrudes radially outward from the connecting portion of the joint main body, and an opposing surface of the press ring and the joint main body. An interval regulating portion sandwiched between, an inner peripheral surface of a bolt insertion hole formed in a connection portion of the push wheel, or an inner peripheral surface of a bolt insertion hole formed in a connection portion of the joint body, and the bolt A locking piece that can be inserted from the direction of the bolt axis with respect to the gap formed between the outer circumferential surface and the outer peripheral surface is provided,
When the spacer for temporary fixing is rotated along the inner peripheral surface of the bolt insertion hole of the pusher wheel or the joint body in a state where the locking piece is inserted into the gap, the interval restricting portion is moved to the pusher wheel. A pipe joint that is configured to be freely changeable in a temporary fixing posture positioned at a distance restriction position between the opposing surfaces of the joint main body and a gap restriction release posture in which the gap restriction portion is separated from the gap restriction position.   2. The pipe joint according to claim 1, wherein the locking piece is formed to protrude in the thickness direction from an outer edge portion on one side surface in the thickness direction of the main body base portion.   A detachment operation space that allows the locking piece to be inserted and removed in the bolt axis direction with respect to the gap between the main body base of the temporary fixing spacer in the spacing restriction releasing posture and the push ring or the joint main body. The pipe joint according to claim 1 or 2, wherein is formed.   The main body base of the temporary fixing spacer and the push ring are formed in a thickness that is smaller than the thickness of the interval restriction portion by a dimension corresponding to the insertion / removal allowance of the locking piece, and in the interval restriction release posture. Or the said coupling operation space is formed between the said coupling main bodies, The pipe coupling of Claim 3.   4. The pipe joint according to claim 3, wherein the press ring or the joint body is formed with a recess that forms the desorption operation space between a surface facing the body base of the temporary fixing spacer in the clearance restriction release posture. . The locking piece is constituted by a plate-like plate-like locking piece that is formed to project from one side surface in the thickness direction of the main body base toward the thickness direction, and the interval regulating portion is the one side surface. The pipe joint according to any one of claims 1 to 4 , wherein the pipe joint is formed so as to protrude from a position on the other side surface on the opposite side and deviated from a position where the plate-like locking piece is formed. The spacing restricting portion is configured to be positioned at a radially outward position of the inner peripheral surface with respect to the locking piece that rotates along the inner peripheral surface of the push wheel or the bolt insertion hole of the joint body. The pipe joint according to any one of claims 1 to 4 and 6 .   The locking piece in which a contact surface that contacts one of the opposing surfaces of the pusher wheel and the joint main body in the spacing regulating portion rotates along an inner peripheral surface of the bolt insertion hole of the pusher wheel or the joint main body. The pipe joint according to claim 7, comprising a tapered surface formed in the interval restricting portion whose thickness increases as it moves away from the interval restricting position in the rotation direction.   The pipe joint according to any one of claims 1 to 8, wherein a finger hooking hole is formed in the grip portion.   The pipe joint according to claim 5, wherein the gap regulating portion and the main body base are formed with the same thickness.   The spacer for temporary fixing used for the pipe joint as described in any one of Claim 1 to 10. A method for assembling a pipe joint according to any one of claims 1 to 10,
The ring packing, the lock ring, and the push ring are placed on the joint body in this order, and the nut is screwed and tightened with the bolt inserted into the bolt insertion hole of the push ring and the joint body. A step of setting the joint body and the press ring to a first temporarily fixed state;
In the first temporary fixing state, the locking piece of the temporary fixing spacer is inserted into the gap formed between the inner peripheral surface of the bolt insertion hole of the push ring or the joint body and the outer peripheral surface of the bolt. Then, while rotating the locking piece along the inner peripheral surface, the interval restricting portion of the temporary fixing spacer is positioned at an interval restricting position between the push wheel and the joint body, and the temporary fixing A step of setting the spacer to the temporary fixing posture;
A method of assembling a pipe joint, wherein the step of further tightening the bolt and nut to place the joint body and the press ring in a second temporarily fixed state is sequentially performed. In the second temporarily fixed state, a step of inserting a joining pipe into the joint body through the push ring;
The locking piece of the temporary fixing spacer in the temporary fixing posture is rotated along the inner peripheral surface of the bolt insertion hole of the push wheel or the joint body in the direction opposite to the rotational direction of the temporary fixing posture. And the step of positioning the interval restricting portion of the temporary fixing spacer at a position disengaged from the interval restricting position between the push wheel and the joint main body, and setting the temporary fixing spacer to the interval restricting release posture. When,
The locking piece in the temporary fixing spacer in the spacing restriction release posture is separated from the gap formed between the inner peripheral surface of the bolt insertion hole of the push ring or the joint body and the outer peripheral surface of the bolt, Removing the temporary fixing spacer from the joint body and the push ring;
The method for assembling a pipe joint according to claim 12, wherein the bolt and the nut are further tightened to perform a step of finally tightening the joint body and the press ring.

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