JP4400130B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint used for connecting a pipe having a male threaded connection portion.

  As a conventional first pipe joint, there is a clamp-type pipe joint for male threads. This clamp-type fitting is connected to a chuck part that has a female thread shape so that it matches the male thread to be connected, and the built-in piston is required to seal using the reaction force against the pressurized pressure of the transport fluid A good pressing force is obtained. In the pipe joint, each of the chuck and the piston has only a single function of connection and seal. In such a pipe joint, lubrication of the seal (O-ring, etc.) that seals the piston sliding part depending on the type of the carrier fluid is not ensured, which causes premature wear and deterioration, and maintenance of the piston sliding part. Sometimes, there is a problem that a large number of work steps are required with disassembly of the pipe joint body.

Further, as a conventional second pipe joint, there is a joint for connection object having a screw hole (female thread) (see, for example, JP-A-11-248056 (Patent Document 1)). This pipe joint expands two ratchets inserted into the inner periphery of the connection target, and when the ratchet engages the thread groove portion of the screw hole, the seal member presses around the tip of the screw hole of the connection target. And seal. However, this pipe joint has a problem that it cannot be connected when the connection portion to be connected is a male screw.
Japanese Patent Laid-Open No. 11-248056

  Accordingly, an object of the present invention is to provide a pipe joint in which a connection portion can easily connect a connection target of a male screw while maintaining airtightness with a simple configuration without an internal piston structure.

In order to achieve the above object, the pipe joint of the present invention is:
An inner cylinder,
A first outer cylinder portion that is externally fitted to the inner cylinder portion so as to freely advance and retract;
A second outer cylinder part fitted to the first outer cylinder part so as to freely advance and retract;
A chuck part that is partly sandwiched between the first outer cylinder part and the second outer cylinder part, and is arranged so as to be swingable at a circumferential interval on the side to which the connection object is connected;
A lever that is tiltably supported on the outer periphery of the first outer cylinder portion and has at least one of a cam groove or a cam surface;
Using at least one of the cam groove or the cam surface, the first outer cylinder part is slid to the side opposite to the side to which the connection target is connected with respect to the inner cylinder part by rotating the lever. On the other hand, the second outer cylinder part is slid to the side to which the connection object is connected with respect to the inner cylinder part by rotating the lever, and the first outer cylinder part and the second outer cylinder part cooperate. The chuck part is swung by movement, the male screw part to be connected is grasped by the swung chuck part, and the tip part of the connection target is pushed into the inner cylinder part.

  According to the pipe joint having the above configuration, at least one of the first outer cylinder part or the second outer cylinder part is moved with respect to the inner cylinder part by tilting the lever using at least one of the cam groove or the cam surface of the lever. By sliding in the axial direction, the chuck portion partially sandwiched between the first outer cylinder portion and the second outer cylinder portion is swung. Then, the chucked portion that has been swung is used to grasp the thread groove portion to be connected and push the tip portion into the inside of the inner cylinder portion. Thus, sealing can be performed using, for example, an O-ring or the like by the pressing force of the distal end of the connection target that is pushed in. Therefore, the connection portion can easily connect the connection target of the male screw while maintaining airtightness with a simple configuration without an internal piston structure. Further, the operability can be improved by tilting the lever, and whether or not the movement of the sliding member (at least one of the first outer cylinder portion and the second outer cylinder portion) is completed by checking the tilt of the lever is determined. Can be easily done. Further, since the tilting operation is changed to the linear operation by the cam mechanism, the load necessary for the movement of the sliding member can be reduced.

Also, using at least one of the cam groove or cam surface, movement of the first outer tube part (slide to the side opposite to the side where the connection object is connected) movement of the second outer cylinder section (first outer cylinder The chuck so as to effectively grab the male thread portion of the connection target and push the tip end of the connection target into the inside of the inner cylinder portion by the cooperative operation of the slide to the side where the connection target in the opposite direction to the connection portion) The part can be swung.

  In a pipe joint according to an embodiment, the lever includes the cam groove and the cam surface, and the first outer cylinder portion is slid by rotation of the lever using one of the cam groove or the cam surface. On the other hand, using the other of the cam groove or the cam surface, the second outer cylinder portion is slid by the rotation of the lever.

  According to the pipe joint of the above embodiment, the first outer cylinder portion is slid using one of the cam groove or the cam surface, and the second outer cylinder portion is slid using the other of the cam groove or the cam surface. The configuration can be simplified by combining different cam mechanisms for the cam groove and the cam surface.

  The pipe joint according to an embodiment is characterized in that the chuck portion is disposed at two opposing positions on the side to which the connection target is connected.

  According to the pipe joint of the above embodiment, the chuck portions are connected with two minimum configurations by the chuck portions respectively disposed at two opposing positions between the first outer cylinder portion and the second outer cylinder portion. The tip part of the connection target can be pushed into the inner cylinder part by securely grasping the target screw groove part from the radially outer side and opposite sides.

  In one embodiment of the pipe joint, the chuck portion is sandwiched between an engagement portion that engages with a thread groove of the male thread portion to be connected, and the first outer cylinder portion and the second outer cylinder portion. And a swinging shaft portion which is substantially the center of swinging.

  According to the pipe joint of the above embodiment, the chuck portion swings about the swinging shaft portion sandwiched between the first outer cylinder portion and the second outer cylinder portion, and the engagement of the chuck portion is increased. Since the joint portion engages with the thread groove of the male screw portion to be connected, the chuck portion can be swung so that the connection target is grasped by the engaging portion with a simple configuration.

  The pipe joint according to an embodiment is characterized in that the engaging portion of the chuck portion is provided so as to be shifted in the axial direction in accordance with the thread pitch to be connected.

  According to the pipe joint of the above-described embodiment, since the crest and trough of the thread groove with which the engaging portion of the chuck portion engages are displaced in the axial direction depending on the circumferential position where the chuck portion is arranged, the chuck portion By disengaging the engagement portions of the chuck portions in the axial direction according to the thread pitch of the connection target, there is no displacement of the engagement between the engagement portions of the chuck portions and the corresponding screw groove portions, and the connection of the screw to be connected by the chuck portion. The groove portion can be securely grasped.

  As apparent from the above, according to the pipe joint of the present invention, the chuck portion is swung by sliding at least one of the first outer cylinder portion or the second outer cylinder portion in the axial direction by the tilting of the lever. Accordingly, the male threaded portion to be connected is grasped from the outside in the radial direction by the chuck portion and the tip end portion is pushed into the inner cylinder portion, so that the connecting portion can be kept male-tight with a simple structure without an internal piston structure. The connection target of the screw can be easily connected. In addition, since at least one of the first outer cylinder part or the second outer cylinder part is slid by the tilt of the lever, the operability can be improved and whether or not the slide is completed by confirming the tilt of the lever. Can be easily determined. Further, since the tilting operation is changed to the linear operation by the cam mechanism using the lever having at least one of the cam groove or the cam surface, the load necessary for the movement of the sliding member can be reduced.

Further , the first outer cylinder part is moved to the side opposite to the side to which the connection object is connected using at least one of the cam groove or the cam surface, and the second outer cylinder part is used using the other of the cam groove or the cam surface. The chuck part is swung so as to effectively grab the male screw part of the connection target and push the tip of the connection target into the inner cylinder part by a coordinated operation of moving the connection target to the side to which the connection target is connected. be able to.

  According to the pipe joint of an embodiment, the first outer cylinder portion is slid using one of the cam groove or the cam surface, and the second outer cylinder portion is slid using the other of the cam groove or the cam surface. Therefore, the configuration can be simplified by combining different cam mechanisms with cam grooves and cam surfaces.

  According to the pipe joint of an embodiment, the screw groove portion to be connected is radially arranged with a minimum configuration in which chuck portions are arranged at two opposing positions between the first outer cylinder portion and the second outer cylinder portion. The tip part to be connected can be pushed into the inner cylinder part by securely grasping from both sides opposite to each other.

  According to the pipe joint of one embodiment, the engaging part that engages with the thread groove of the male thread part to be connected and the first outer cylinder part and the second outer cylinder part are sandwiched between the engaging part and the swinging part. The chuck portion can be swung so that the connection target is grasped by the engaging portion by a simple configuration of the swinging shaft portion which is substantially the center.

  According to the pipe joint of one embodiment, the engagement portion of the chuck portion is provided in the axial direction so as to be shifted according to the thread pitch to be connected, whereby the engagement portion of each chuck portion and the corresponding screw groove portion are engaged. Misalignment is eliminated, and the screw groove portion to be connected can be reliably grasped by the chuck portion.

  Hereinafter, the pipe joint of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a cross-sectional view showing a state before clamping of a pipe joint according to an embodiment of the present invention, wherein 1 is an inner cylinder portion, and 2 is a first outer cylinder that is externally fitted to the inner cylinder portion 1 so as to be able to advance and retract. , 3 is a second outer cylinder part that is externally fitted to the first outer cylinder part 2 so as to be able to advance and retreat, and 4, 4 are chuck parts that are arranged at intervals in the circumferential direction on the side to be connected. is there.

  The inner cylinder portion 1 includes a main body sleeve 11, a fixing ring 13 fitted on the main body sleeve 11, a hollow guide pin 14 disposed in the main body sleeve 11 so as to freely protrude and retract, and the first outer cylinder. A connecting end portion 15 fixed to one end of the main body sleeve 11 protruding from the portion 2, a columnar guide portion 17 protruding radially outward from opposite sides of the outer periphery of the fixing ring 13, and the main body sleeve 11 And the O-ring 18 disposed inside the connection end opposite to the connection end 15 side. A guide pin spring (not shown) for urging the guide pin 14 in the direction toward the chuck portion 4 is disposed in the main body sleeve 11. The guide pin 14 has a small diameter portion 14a on the side to be connected, a large diameter portion 14b on the connection end 16 side, and a step portion 14c between the small diameter portion 14a and the large diameter portion 14b. is doing. A step portion 14 c of the guide pin 14 biased by the guide pin spring is in contact with a step portion 11 a provided inside the main body sleeve 11.

  In FIG. 1, the male thread portion of the pipe to be connected is inserted inside the O-ring 18 of the inner cylinder portion 1, and the distal end side of the guide pin 14 is immersed in the passage inside the pipe. The pipe inserted by the guide pin 14 is guided along the axial direction so as not to tilt.

  The first outer cylinder portion 2 includes a rear side 12A, a front side 12B screwed and fixed to a side to which a connection target of the rear side 12A is connected, and an outer periphery of the rear side 12A. And a shaft portion 16 (only one of them is shown in FIG. 1) projecting radially outward from both sides. Furthermore, the second outer cylinder portion 3 has a rear side 20A and a front side 20B that is screwed and fixed to a side to which a connection target of the rear side 20A is connected. It should be noted that the second outer cylinder portion 3 is connected to the first outer cylinder portion 2 on the connection end 15 side between the outer peripheral surface of the first outer cylinder portion 2 and the inner peripheral surface of the second outer cylinder portion 3. A spring (not shown) that urges toward is arranged.

  Further, the pipe joint has a lever 40 supported by the shaft portion 16 of the first outer cylinder portion 2 so as to be tiltable. The lever 40 includes two plate-like base portions 40a (only one is shown in FIG. 1) arranged in parallel so as to sandwich the first outer cylinder portion 2 from both sides, and a connection for connecting the two base portions 40a. It has the part 40b and the bending part 40c bent and extended from the connection part 40b. Each of the two base portions 40a includes a round hole 41 through which the shaft portion 16 of the first outer cylinder portion 2 is inserted, and a cam groove 42 that is an arc-shaped elongated hole that surrounds the circumference of the round hole 41 approximately ¼. And have. Further, each of the two base portions 40a is a circle that is in the vicinity of the round hole 41 and is a corner portion that connects the side surfaces of two orthogonal linear portions of the side surfaces along the plate thickness direction of the base portion 40a and the two side surfaces. It has a cam surface 43 formed of an arcuate curved surface. In the state of FIG. 1, one side surface of the cam surface 43 (the side with the shortest distance to the round hole 41) is in contact with the end surface of the rear side 20 </ b> A of the second outer cylinder portion 3, and the lever 40 is connected to the connection end portion 15. By tilting to the side, the other side surface of the cam surface 43 (the side having the longest shortest distance to the round hole 41) is connected to the second outer cylinder portion 3 through the curved surface of the cam surface 43 as shown in FIG. It will be in the state after the clamp which touches the end surface of 20 A of back parts.

  In the state before clamping in FIG. 1, the side surface of one straight portion of the cam surface 43 provided in the vicinity of the respective round holes 41 of the two base portions 40 a of the lever 40 is connected to the second outer cylinder portion 3. It is in contact with the end surface opposite to the connected side. When the lever 40 is tilted toward the connecting end 15, the lever 40 tilts about the shaft portion 16, and the guide portion 17 protruding from the fixing ring 13 is guided by the arc-shaped guide hole 42. Then, the first outer cylinder part 2 slides toward the side opposite to the chuck part 4 side (the connection end part 15 side) with respect to the inner cylinder part 1. On the other hand, the cam surface 43 of the lever 40 causes the second outer cylinder portion 3 to slide toward the chuck portion 4 with respect to the first outer cylinder portion 2 against the urging force of a spring (not shown). At this time, the amount of movement of the second outer cylinder portion 3 is larger than the amount of movement of the first outer cylinder portion 2, and as a result, the second outer cylinder portion 3 moves closer to the chuck portion 4 than the inner cylinder portion 1. Will slide towards you.

  Thus, as shown in the cross-sectional view of the clamped state in FIG. 2, the lever 40 is tilted about the shaft portion 16 inserted into the round hole 41, and the first outer cylinder using the cam groove 42 is used. Movement of the part 2 (slide to the side opposite to the connection target side) and movement of the second outer cylinder part 3 using the cam surface 43 (slide to the connection target side in the direction opposite to the first outer cylinder part) The chuck part 4 swings in a state where a part is sandwiched between the front part side 12B of the first outer cylinder part 2 and the front part side 20B of the second outer cylinder part 3. Then, the swinging chuck part 4 holds the male screw part of the pipe to be connected (not shown) and pushes the tip of the pipe into the inner cylinder part 1.

  3 shows a side view of the chuck portion 4. As shown in FIG. 3, the chuck portion 4 includes a base portion 31, an engaging portion 32 provided on one of the base portions 31, and A triangle-shaped convex portion 33 provided on the side opposite to the engaging portion 32 side of the base portion 31 and on the left side in the drawing, and bends extending from the side opposite to the engaging portion 32 side of the base portion 31 and on the right side in the drawing. A bent portion 34 and a swinging shaft portion 35 provided at the tip of the bent portion 34 are provided. The engaging portion 32 has a plurality of concavities and convexities that engage with the thread groove to be connected, and the pitch of the concavities and convexities corresponds to the thread pitch to be connected.

  The convex portion 33 of the chuck portion 4 has a tapered surface 33a extending obliquely downward to the right in the drawing from the tip, and the bent portion 34 has a horizontal surface 34a in the drawing on the upper side. Continuing from the surface 34a of the bent portion 34, the swinging shaft portion 35 has a tapered surface 35a extending obliquely upward to the right and a tapered surface 35b extending downward from the upper end of the tapered surface 35a. The bent portion 34 has a horizontal surface 34b in the drawing and a tapered surface 34c extending from the left end of the surface 34b to the engaging portion 32 obliquely downward to the left in the drawing. The distal end side of the bent portion 34 is narrower than the swinging shaft portion 35, and the distal end side of the bent portion 34 and the swinging shaft portion 35 form a hook shape.

  4 shows an enlarged view of the main part of the pipe joint in the state before clamping shown in FIG. 1, and FIG. 5 shows an enlarged view of the main part of the pipe joint in the state after clamping shown in FIG. 4 and 5 show the main part including the chuck part 4 arranged on the upper side of FIG. 1, but the other (lower side of FIG. 1) chuck part 4 operates in the same manner.

  As shown in FIG. 4, the front side 12B of the first outer cylinder part 2 includes a convex part 23 projecting radially outward on the tip side, and a concave part 24 provided on the left side of the convex part 23 in the figure, The concave portion 24 is provided on the left side and the entire circumference in the figure, and has an annular convex portion 25 whose outer peripheral surface is in sliding contact with the inner peripheral surface of the front side 20B of the second outer cylinder portion 3. On the other hand, the front side 20B of the second outer cylinder portion 3 includes a cylindrical small-diameter portion 21 that extends to the left side in the drawing, and a convex portion having a semicircular cross section that protrudes inward in the radial direction in the right side of the small-diameter portion 21 in the drawing. 22.

  In the state before clamping, the tip of the pipe (not shown) to be connected is inserted from the left side in the figure inside the inner cylinder part 1, and the tip side (left side in the figure) of the chuck part 4 is directed to the upper left. Tilted. At this time, the tip of the cylindrical small-diameter portion 21 on the front side 20B of the second outer cylinder portion 3 comes into contact with the surface 34a (shown in FIG. 3) of the bent portion 34 of the chuck portion 4, and the chuck portion 4 is shaken. The convex portion 22 on the front side 20 </ b> B of the second outer cylinder portion 3 is in contact with the tapered surface 35 a (shown in FIG. 3) of the moving shaft portion 35. Further, a part of the lower side of the swinging shaft portion 35 of the chuck portion 4 is fitted in the concave portion 24 on the front side 12 </ b> B of the first outer cylinder portion 2. That is, the chuck portion 4 is held by being sandwiched between the first outer cylinder portion 2 and the second outer cylinder portion 3.

  From the state before clamping shown in FIG. 4, the first outer cylinder portion 2 slides toward the side opposite to the side to be connected (the right side in FIG. 4), while the second outer cylinder portion 3 is in the opposite direction. As shown in FIG. 5, the convex portion 22 on the front side 20 </ b> B of the second outer cylinder portion 3 becomes a tapered surface of the chuck portion 4. The tip of the cylindrical small-diameter portion 21 on the front side 20B of the second outer cylindrical portion 3 tapers the convex portion 33 of the chuck portion 4 while sliding from the surface 35a toward the surface 34 (shown in FIG. 3). Abutting on the surface 33a (shown in FIG. 3), the chuck portion 4 is swung about the swinging shaft portion 35 as a center. At this time, the tip of the convex portion 33 of the chuck portion 4 is in contact with the inner peripheral surface on the tip side of the cylindrical small-diameter portion 21 on the front side 20B of the second outer cylinder portion 3, and the bent portion 34 of the chuck portion 4 The convex portion 22 on the front side 20B of the second outer cylinder portion 3 abuts on the surface 34a (shown in FIG. 3), and the lower side of the bent portion 34 of the chuck portion 4 (the surface 34b and the tapered surface 34c shown in FIG. 3). The convex portion 23 on the front side 12 </ b> B of the first outer cylinder portion 2 is fitted into the side). That is, the chuck portion 4 in the clamped state is sandwiched and held between the first outer cylinder portion 2 and the second outer cylinder portion 3.

  Then, when the second outer cylinder portion 3 slides to the side where the connection target is connected, the engaging portion 32 of the chuck portion 4 protrudes inward, and further, the first outer cylinder portion 2 is connected to the connection target. By sliding toward the opposite side, the entire chuck portion 4 also slides in the same direction. Thus, the two chuck portions 4 hold the pipe from the radially outer side opposite to the male thread portion and push the pipe further toward the O-ring 18 side. Note that the amount of movement of the first outer cylinder portion 2 relative to the inner cylinder portion 1 at this time is L1 shown in FIG. 2, and the amount of movement of the second outer cylinder portion 3 relative to the inner cylinder portion 1 is L2 (> L1). The amount of movement of the second outer cylinder part 3 relative to the first outer cylinder part 2 is L1 + L2.

  In this way, the two chuck parts 4 facing each other push the pipe into the inner cylinder part 1 so as to be sandwiched from both the radially outer side and the opposite sides, so that the leading end of the pipe comes into contact with the O-ring 18. Airtightness is maintained. A pipe (not shown) connected to the connection end 15 and the pipe to be connected communicate with the inside of the main body sleeve 11 via the passage 14d of the guide pin 14.

  With the pipe joint of the above embodiment, a pipe (not shown) connected to the connection end 15 and a pipe to be connected can be connected while maintaining airtightness without an internal piston structure.

  As described above, in the pipe joint, the first and second outer cylindrical portions 2 and 3 are axially moved with respect to the inner cylindrical portion 1 by the tilting of the lever 40 using the cam groove 42 and the cam surface 43 of the lever 40. The chuck portions 4 and 4 are swung by sliding them, the screw portions to be connected are gripped by the swung chuck portions 4 and 4, and the leading end portion of the O-ring 18 inside the inner cylinder portion 1 is held. Therefore, the connection portion can easily connect the connection target of the male screw while maintaining airtightness with a simple configuration without an internal piston structure. Moreover, since the 1st, 2nd outer cylinder parts 2 and 3 are slid with respect to the inner cylinder part 1 by tilting the said lever 40, the operativity of a connection operation | work can be improved. Further, by confirming the tilting of the lever 40, it is possible to easily determine whether or not the movement of the first and second outer cylinder parts 2 and 3 is completed, and the first and second outer cylinder parts 2 and 2 The load required for the movement of 3 can be reduced.

  Further, the first outer cylinder part 2 is moved to the connection end 15 side using the cam groove 42, and the second outer cylinder part 3 is moved to the side to which the connection target is connected using the cam surface 43. By the cooperative operation, the chuck portion 4 can be swung so as to effectively grab the male thread portion of the pipe to be connected and push the tip portion of the pipe into the inner cylinder portion 1, and the cam groove and The configuration can be simplified by a combination of cam mechanisms having different cam surfaces.

  Further, by disposing the chuck part 4 in the axial direction in accordance with the thread pitch of the connection target, the displacement of the engagement between the tip part of each chuck part and the corresponding thread groove part is eliminated, and the chuck part is connected to the connection target. It is possible to securely grasp the thread groove portion of In addition, you may provide the position of the several unevenness | corrugation of the engaging part 32 (shown in FIG. 3) of the chuck | zipper part 4 shifting in an axial direction. In both cases of shifting the chuck portion 4 and the plurality of concaves and convexes of the engaging portion 32, the chuck portion 4 is arranged so as to be shifted in the direction of approximately ½ axis of the screw pitch of the male screw portion to be connected (the male screw portion in this case Is a single screw). For example, when three chuck portions are arranged at intervals in the circumferential direction, the respective chuck portions are arranged so as to be shifted in the axial direction by approximately 1/3 of the screw pitch to be connected.

  Further, with the minimum configuration in which the chuck portions 4 are disposed at two opposing positions between the first outer cylinder portion 2 and the second outer cylinder portion 3, the thread groove portion of the pipe to be connected is radially outward and The tip of the pipe can be pushed into the inner cylinder part 1 by securely grasping from both opposing sides.

  Further, the chuck portions 4 and 4 can be swung so that the connection object is grasped by the engaging portion 32 with a simple configuration of the engaging portion 32 and the swinging shaft portion 35 of the chuck portions 4 and 4.

  In the above-described embodiment, the first and second outer cylinder portions 2 and 3 are slid in the opposite directions by the operation of the lever 40 to swing the chuck portions 4 and 4. Only one of the outer tube portions may be slid to swing the chuck portion.

  In the above embodiment, the first outer cylinder portion 2 is slid by the cam mechanism using the cam groove 42 of the lever 40, and the second outer cylinder portion 3 is slid by the cam mechanism using the cam surface 43 of the lever 40. However, the first outer cylinder portion may be slid by the cam mechanism using the cam surface, and the second outer cylinder portion may be slid by the cam mechanism using the cam groove, or only one of the cam groove or the cam surface may be used. The first and second outer cylinders may be slid by a cam mechanism using

FIG. 1 is a cross-sectional view showing a state before clamping of a pipe joint using the pipe joint according to the embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state after clamping of the pipe joint. FIG. 3 is a side view of the chuck portion of the pipe joint. FIG. 4 is an enlarged view of a main part of the pipe joint shown in FIG. FIG. 5 is an enlarged view of a main part of the pipe joint shown in FIG.

1 ... inner cylinder part,
2 ... 1st outer cylinder part,
3 ... 2nd outer cylinder part,
4 ... chuck part,
11 ... Body sleeve,
13: fixing ring,
14 ... guide pins,
15 ... Connection end,
16 ... shaft part,
17 ... Guide part,
18 ... O-ring,
40 ... Lever,
41 ... round hole,
42. Cam groove,
43 ... Cam surface.

Claims (5)

The inner cylinder (1),
A first outer cylinder part (2) externally fitted to the inner cylinder part (1) so as to freely advance and retract;
A second outer cylinder portion (3) externally fitted to the first outer cylinder portion (2) so as to freely advance and retract;
A part is sandwiched between the first outer cylinder part (2) and the second outer cylinder part (3), and is arranged so as to be swingable at a circumferential interval on the side to be connected. Chuck part (4),
A lever (40) supported on the outer periphery of the first outer cylinder (2) so as to be tiltable and having at least one of a cam groove (42) or a cam surface (43);
Using at least one of the cam groove (42) and the cam surface (43), the lever (40) is rotated to move the first outer cylinder part (2) with respect to the inner cylinder part (1). While the connection target is slid to the side opposite to the side to be connected, the connection of the second outer cylinder part (3) with respect to the inner cylinder part (1) by rotating the lever (40). slide the side connected, the first and outer tube portion (2) and the second outer tubular portion by cooperation of (3) is swung the chuck portion (4), the chuck is swung A pipe joint characterized by holding the male thread part to be connected by the part (4) and pushing the tip part to be connected into the inner cylinder part (1) . In the pipe joint according to claim 1 ,
The lever (40) has the cam groove (42) and the cam surface (43),
One of the cam groove (42) and the cam surface (43) is used to slide the first outer cylinder portion (2) by turning the lever (40), while the cam groove (42) or the cam surface (43) is A pipe joint characterized in that the second outer cylinder part (3) is slid by rotation of the lever (40) using the other of the cam surfaces (43). In the pipe joint according to claim 1 or 2 ,
The pipe joint, wherein the chuck portion (4) is disposed at two opposing positions on the side to which the connection object is connected. In the pipe joint according to any one of claims 1 to 3 ,
The chuck part (4) includes an engaging part (32) that engages with a thread groove of the male thread part to be connected, the first outer cylinder part (2), and the second outer cylinder part (3). And a pivot shaft (35) which is sandwiched between the two and serves as the approximate center of oscillation. In the pipe joint according to claim 4 ,
The pipe joint according to claim 1, wherein the engaging portion (32) of the chuck portion (4) is provided to be shifted in the axial direction in accordance with the thread pitch to be connected.

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