JP2013036503A5 - - Google Patents

Description

An object of the present invention is to cope with such a problem. The pipe body is grounded while securely connecting the pipe body with the pipe joint, and the connection of the pipe body to the pipe joint and the ground are simultaneously performed. The purpose is to do .

In order to achieve such an object, the present invention provides a tubular body in which a conductive portion is provided on the outer surface in the axial direction, a pipe joint to which one end of the tubular body is detachably connected, the conductive portion, A grounding member that electrically communicates with the pipe joint, and the pipe joint includes a nipple provided to face the inner surface of the pipe body, and an insertion space of the pipe body with respect to an outer peripheral surface of the nipple. A clamping member provided so as to be sandwiched and compressed in a radial direction, and a connection portion made of a conductive material and attached so as to be in electrical communication with other equipment, and the clamping member is connected to the nipple The sleeve is supported so as to be movable in the insertion direction of the tube body, and a sleeve facing the outer surface of the tube body as the ground member is electrically connected to the connecting portion between the fastening member and the nipple. Provided The probe is made of a conductive material so as to be elastically deformed in the radial direction as the fastening member moves with respect to the nipple, and the inner peripheral surface of the sleeve is brought into contact with the conductive portion when the diameter is reduced. characterized in that in communication with the.

In the present invention having the above-described features, the ground member is disposed so as to be in electrical communication with the connection portion of the pipe joint made of a conductive material and the conductive portion of the pipe body, thereby generating static electricity generated in the pipe body. However, since it flows from the conductive portion through the ground member to the connection portion and is grounded from the connection portion to another device, the tube body can be grounded while being securely connected by the pipe joint.
As a result, an external force is applied to the pipe body in the direction of pulling out from the pipe joint in the connected state of the pipe body compared to the conventional one in which the hose withdrawal from the metal pipe is regulated by the clamping force of the ground member, Even if the pressure (internal pressure) of fluid or the like passing through the inside rises, there is no possibility that the pipe body will come off from the pipe joint, and leakage of fluid or the like can be reliably prevented.
Further, when the fastening member moves with respect to the nipple, the sleeve serving as the ground member is deformed in diameter and the inner peripheral surface thereof is brought into contact with the conductive portion of the tubular body. It flows through the sleeve as a member to the connecting portion and is grounded.
As a result, the pipe body can be connected to the pipe joint and grounded at the same time.
As a result, compared to the conventional work in which the hose is tightened with a grounding member and the hose is tightened separately with a tightening band, no matter who has experience, the pressure resistance and grounding performance are high. Can be expected to improve safety.

The nipple 21 is formed integrally with the pipe joint 20 with a conductive material such as metal, or is formed separately from the pipe joint 20 with a non-conductive material such as hard synthetic resin. Specifically, the plate 10 is formed in a cylindrical shape having an outer diameter that is substantially the same as or slightly larger than or slightly smaller than the inner diameter of the tube body 10, or a plate material made of a deformable conductive material such as stainless steel is pressed. Further, by performing other forming processes, the tube body 10 is formed into a thin cylindrical shape having an outer diameter that is substantially the same as or slightly larger than or slightly smaller than the inner diameter of the tube body 10.
Furthermore, it is preferable to form a concavo-convex portion 21 a for preventing slipping on the outer peripheral surface of the nipple 21 that faces the inner surface 10 b at one end of the tube body 10.
In the example shown in FIGS. 1 to 5, it is preferable to form an annular concave portion at the axially intermediate position of the outer peripheral surface of the nipple 21 as the concave-convex portion 21 a for retaining.
Although not shown as another example, an annular concave portion and an annular convex portion are alternately formed in the shape of a bamboo slab at an intermediate position in the axial direction of the outer peripheral surface of the nipple 21, or the outer peripheral surface of the nipple 21 is formed as a smooth surface. It is also possible to do.

On the inner peripheral surface 24a of the sleeve 24, for example, an elastically deformable annular seal member 24c such as an O-ring is preferably provided so as to protrude toward the insertion space 20s of the tube body 10.
As shown in FIG. 2, the seal member 24 c is formed in an annular shape with a material that can be compressed and deformed, such as rubber, and the outer peripheral portion of the seal member 24 c with respect to the mounting recess 24 d formed on the inner peripheral surface 24 a of the sleeve 24. The inner peripheral end of the sealing member 24c is positioned so as to protrude toward the outer surface 10a of the tubular body 10 by being fitted so as not to move. Further, the inner peripheral surface of the seal member 24c is curved and formed in a substantially arc shape in cross section, and a concave groove portion 24e into which a bulging deformed portion enters when the seal member 24c is compressed and deformed is formed on the surface. preferable.
Although not shown in the drawings as another example, the seal member 24c is not provided on the inner peripheral surface 24a of the sleeve 24, and a part or all of the axial direction is formed smoothly on the inner peripheral surface 24a of the sleeve 24, so It is also possible to make contact with the outer surface 10a and the conductive portion 11 of the metal.

In the example shown in FIGS. 1A and 1B and FIG. 2, a pressing sleeve 26 is rotatably provided between the inner peripheral surface of the fastening member 22 and the outer peripheral surface of the sleeve 24.
Pressing the sleeve 26 of the illustrated example, a non-conductive material such as hard synthetic resin is formed in a substantially cylindrical shape having substantially the same outer diameter as the inner diameter of the clamping member 22, a reduced diameter section 22b on the inner circumferential surface thereof Locking portions 26a are formed on the outer peripheral surface of the outer peripheral surface on the outer periphery on the tip side opposite to the tube insertion direction N, and are supported so as to reciprocate in the tube insertion direction N.
In the tightening member 22, a flange portion 22 c that protrudes toward the insertion space 20 s of the tube body 10 is formed on the inner periphery of the distal end in the direction opposite to the tube insertion direction N facing the locking portion 26 a of the pressing sleeve 26. By bringing the locking portion 26a of the pressing sleeve 26 into sliding contact with the flange portion 22c of the clamping member 22 in a freely rotatable manner, the diameter of the pressing sleeve 26 is reduced as the clamping member 22 moves in the tube insertion direction N. The tapered surface 22b is interlocked in the same direction, and the sleeve 24 is deformed in a reduced diameter so that one end of the tubular body 10 is sandwiched between the nipple 21 and the tapered surface.

According to the pipe connection structure A according to the first embodiment of the present invention, the movement of the fastening member 22 with respect to the nipple 21 causes the sleeve 24 serving as the ground member 30 to be reduced in diameter, and the inner peripheral surface 24a thereof is the tubular body. By making contact with the ten conductive portions 11, static electricity generated in the tubular body 10 flows to the connection portion 23 through the conductive portion 11 and the sleeve 24 serving as the ground member 30 and is grounded.
Thereby, there exists an advantage that the connection and grounding of the pipe body 10 with respect to the pipe joint 20 can be performed simultaneously.
As a result, compared to the conventional work in which the hose is tightened with a grounding member and the hose is tightened separately with a tightening band, no matter who has experience, the pressure resistance and grounding performance are high. Can be expected to improve safety.

In the example shown in FIG. 4, the inner peripheral surface 26 b on the distal end side of the pressing sleeve 26 is formed to be substantially the same as the outer diameter of the tube body 10, and the inner peripheral surface of the distal end edge is opposite to the tube insertion direction N. By forming the guide surface 26c that gradually expands in the radial direction, the distal end surface 10d passes smoothly without being caught by the insertion of the tubular body 10 into the insertion space 20s, and the inner peripheral surface on the distal end side. 26b is surely in contact with the conductive portion 11 of the tubular body 10.
Although not shown other examples, or the inner peripheral surface 26b of the tip end of the pressing sleeve 26 by the outer diameter remote slightly smaller form of the tube 10, to ensure contact with the conductive portion 11 of the tubular body 10 As in the first and second embodiments, the pressing sleeve 26 may be formed with a locking portion that is slidably contacted with the flange portion 22c of the tightening member 22, or may have a shape other than the illustrated example. .

In the fourth embodiment, as shown in FIGS. 5A and 5B, the ground member 30 is a clip 31 made of a conductive material provided separately from the pipe joint 20, and the clip 31 is attached to the outer surface of the tube body 10. 10a is arranged so that a part of the clip 31 comes into contact with the fastening member 22 made of a conductive material, and when the tube body 10 and the pipe joint 20 are connected by operating the fastening member 22, the clip 31 A configuration in which the inner peripheral surface is brought into contact with the conductive portion 11 of the tube body 10 and a part of the clip 31 is arranged to be in electrical communication with the connection portion 23 via the fastening member 22 made of a conductive material and the joint body 25. However, unlike the first embodiment shown in FIGS. 1A and 1B and FIG. 2, the other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B and FIG. .

The clip 31 is formed by bending a conductive material such as a metal wire, for example, and is formed in an annular shape that is substantially the same as or slightly smaller than the outer diameter of the tube body 10 along the outer surface 10a of the tube body 10. Part 31a and a linear terminal part 31b extending in the axial direction of the fastening member 22 along the outer peripheral surface of the fastening member 22, and the inner peripheral surface of the ring part 31a along the outer surface 10a of the tubular body 10 by attaching it to contact the conductive portion 11 opposite to each other, are linear terminal portion 31b is positioned to contact the outer peripheral surface of the clamping member 22.

According to such a pipe connection structure A according to the fourth embodiment of the present invention, the process of connecting the pipe body 10 and the pipe joint 20 is a separate process, but the clip 31 made of a conductive material to be the ground member 30 is connected to the pipe body 10. The outer peripheral surface 10a of the ring portion 31a is wound so that the inner peripheral surface of the ring portion 31a is in contact with the conductive portion 11, and the linear terminal portion 31b is in contact with the outer peripheral surface of the fastening member 22 made of a conductive material. By arranging, the static electricity generated in the tubular body 10 flows to the connection portion 23 through the conductive portion 11, the clip 31 made of a conductive material serving as the ground member 30, the fastening member 22, and the joint body 25, and is grounded.
Thereby, there is an advantage that the pipe body 10 can be grounded without improving the pipe joint 20.

In the illustrated example, the sliding means 22a for the clamping member 22 to the nipple 21 is axially moved, has formed the female thread portion and the male screw portion 25 c screwed with each other, without being limited thereto, the nipple 21 On the other hand, a structure other than a screw may be used as long as the fastening member 22 can be moved in the axial direction.

Claims (2)

A tube having a conductive portion provided on the outer surface in the axial direction;
A pipe joint to which one end of the pipe body is detachably connected;
A grounding member that electrically communicates the conductive portion and the pipe joint;
The pipe joint includes a nipple provided so as to face the inner surface of the pipe body, and a tightening member provided so as to compress the insertion space of the pipe body in the radial direction with respect to the outer peripheral surface of the nipple. A connection portion made of a conductive material and attached to be in electrical communication with other equipment,
The clamping member is supported with respect to the nipple so as to be movable in the insertion direction of the tubular body, and a sleeve facing the outer surface of the tubular body is provided as the grounding member between the clamping member and the nipple. Provide to be in electrical communication with the connection,
The sleeve is formed of a conductive material so as to be elastically deformed in the radial direction along with the movement of the fastening member with respect to the nipple, and the inner peripheral surface of the sleeve is brought into contact with the conductive portion when the diameter is reduced. A pipe connection structure characterized in that it is communicated with.
A pipe connection structure characterized by that. The outer surface of the tubular body, wherein the strip of conductive material as the conductive portion, the tube connection structure according to claim 1 Symbol mounting characterized by being integrally fixed to the axial direction of the tubular body.