JP5384882B2 - Corgate fittings - Google Patents

Description

  The present invention relates to a corrugate pipe joint used for connecting a bellows-like corrugate pipe. In particular, the present invention relates to a corrugate pipe joint having certainty at the time of connection work or having an advantage that it can be disassembled and recycled without cutting the end of the corrugate pipe after construction.

  Metal bellows-like corrugate pipes are widely used for indoor gas pipes and the like. Various pipe joints for connecting the corgate pipe to a gas stopper, a steel pipe or the like are used. For example, Patent Document 1 discloses that a low-hardness rubber packing is mounted in a joint body, a spring that is repelled on the axial entrance side of the body mounted in the joint body, and a spring that is locked in the joint body. Is held in a compressed state, and when the connecting bellows tube is inserted into the joint body, the guide is released from the joint body at the end of the bellows tube, and the guide is released from the compressed spring. A plug that is compressed on the outer peripheral surface of the bellows tube by stretching, and a retaining member that is pushed through the packing by the extension of the spring and is latched to the undulations of the bellows tube Joints are described.

  Patent Document 2 has a main body having an inner hole into which an end of a corrugate tube is inserted, and a claw that is disposed in the inner hole and is inserted into an annular recess on the outer surface of the corgate tube. A retainer for locking the corrugate tube, a sealing means for sealing between the corrugate tube and the main body, and a slidably engaged with the main body, and the corrugate pipe is engaged with the main body at a specific sliding position. A retainer presser that locks the retainer in a stopped state, a locking mechanism that prevents the retainer presser from sliding, an erroneous operation prevention mechanism that prevents the retainer presser from moving unexpectedly, and a locking mechanism for the retainer presser And a disassembling mechanism that enables the corgate pipe, the retainer, and the retainer retainer to be removed from the main body. It is.

JP 2001-132881 A JP 2004-316733 A

Social demands for recycling and reuse are also increasing in the building materials field due to the background of resource depletion and soaring materials. In this respect, in a piping member using a metal corrugate pipe, it is necessary to separate a resin material such as a stainless steel corrugate pipe, a pipe joint body made of brass or the like, and packing.
However, the plug-in type pipe joint described in Patent Document 1 has a structure in which the joint main body and the nut-shaped main body are screwed and connected. Therefore, the work for disassembling the plug-in pipe joint requires a great amount of man-hours. There was a problem of requiring.

  Further, in the corrugate pipe joint described in Patent Document 2, it is possible to pull out the corgate pipe by operating the disassembly mechanism to disassemble the joint main body and the retainer presser, but the packing or stopper member is placed in the joint main body. Since it remains, it is necessary to take it out further in order to separate the materials, and there is room for improvement. In addition, since the gap between the inner surface of the cylindrical joint and the outer periphery of the corrugate tube tip is sealed with a ring-shaped sealing material, the roundness of the corrugate tube tip directly affects the sealing performance. That is, if the tip of the corrugate tube is flattened, for example, in the elliptical shape, the seal performance decreases in a short time due to a decrease in seal surface pressure in the short diameter portion, and the seal surface pressure increases more than necessary in the long diameter portion. In the long term, however, the sealing material is permanently set, and there is a concern that the sealing performance may be lowered due to the deterioration of the elastic force of the sealing material. Therefore, it is necessary to manage the flatness of the corrugate pipe at the construction site. Further, when the corrugate pipe is inserted into the pipe joint, it is difficult to understand the response that the tip of the corrugate pipe is engaged with the stopper member, and there is a problem that the connection is made with the insertion amount of the corgate pipe being insufficient.

  The present invention has been made in view of the above problems, and provides a corrugate pipe joint that ensures the connection between the corrugate pipe and the pipe joint, and that it is easy to disassemble and recycle. It is aimed.

The present invention provides a joint main body having an inner hole into which a corrugate pipe is inserted, an elastic member that can expand and contract in the axial direction of the inner hole, a holding means that holds the elastic member in a compressed state, and the inner hole. A seal member that is slidably disposed; a retainer that has a claw portion that engages with the corrugate tube; and an inner diameter of the claw portion that is larger than an outer diameter of the corgate tube; A nut member that is connected, and by inserting the corrugate tube, the holding means releases the compression state of the elastic member, and with the extension of the elastic member, the seal member is compressed in the axial direction, and The retainer is configured to be reduced in diameter and engage with the corrugate tube, and the holding means includes a ring-shaped support portion that supports one end of the elastic member and a tip formed at the tip protruding from the support portion. Stop A holding member having a stopper, a stopper that supports the other end of the elastic member, and is locked to the locking protrusion, and is inserted into an inner hole of the holding member to reduce the diameter of the locking protrusion toward the inner diameter side. A movable member that regulates , and the seal member includes an airtight packing and a fireproof packing, and when the airtight packing disappears, the fireproof packing is extended to the inner hole back side of the joint body by extension of the elastic member. This is a corrugated pipe joint characterized in that its expansion into the pipe is restricted .

  In the present invention, the movable member has a thick portion that restricts the diameter reduction of the locking protrusion toward the inner diameter side, and a contact portion that is pressed against the corrugate tube, and when the corgate tube is inserted The movable member can be configured to move in the depth direction of the joint main body and to reduce the diameter of the contact portion.

The present invention also provides a joint main body having an inner hole into which a corrugate pipe is inserted, an elastic member that can expand and contract in the axial direction of the inner hole, a holding means that holds the elastic member in a compressed state, and the inner hole. A slidable seal member, a retainer having a claw portion that engages with the corrugate tube, and an inner diameter of the claw portion larger than an outer diameter of the corgate tube, and the joint body A nut member connected to the holding member, and by inserting the corrugate tube, the holding means releases the compression state of the elastic member, and with the extension of the elastic member, the seal member is compressed in the axial direction, The retainer is configured to have a reduced diameter and engage with the corrugate tube, and the holding means includes a ring-shaped support portion that supports one end of the elastic member, and is unidirectional from the inner and outer periphery of the support portion. Extended to The double ring member is formed with a locking projection at the tip of the outer ring of the double ring, the inner ring of the double ring is extended to the inner periphery of the seal member, and the elastic member It comprises a stopper that supports the other end of the member and is locked to the locking protrusion, and the outer ring of the holding member is fitted and inserted into the inner peripheral surface of the joint body. The seal member includes an airtight packing, a fireproof When the gas-tight packing disappears, the fireproof packing is a corrugated pipe joint whose expansion toward the inner hole back side of the joint body is restricted by extension of the elastic member .

  According to said structure, if a corrugate pipe | tube is inserted, the front-end | tip of a corgate pipe will move a movable member to the back | inner side of a coupling main body, and will thereby open an elastic member from a compression state. The sound and feel at this time are clearly transmitted to the worker. The urging force of the elastic member compresses the seal member to improve the seal surface pressure with the corrugate tube, and reduces the diameter of the retainer to engage with the corgate tube. Therefore, the construction work can be completed only by inserting the corrugate pipe, and the sound and response when the elastic member is released from the compressed state can be surely recognized. Further, since the retainer does not reduce the diameter while the elastic member is in the compressed state, the corrugate tube can be easily pulled out.

  In the present invention, the inner hole of the joint body has a locking groove and an avoidance groove that is continuous with the locking groove and has a larger diameter than the locking groove, and an outer circumferential groove on the outer diameter side of the nut member. The stop ring is disposed so as to straddle the locking groove and the outer peripheral groove to lock the joint body and the nut member, and the other end side of the nut member has a large diameter portion. Preferably, a disassembly ring is provided between the large diameter portion and the end of the joint body.

  According to this configuration, when the disassembly ring is removed and the nut member is slid, the stop ring moves to the avoidance groove, and the engagement state between the joint body and the nut member is released. When the corrugate tube is pulled out in this state, the nut member, retainer, seal member, and spring pack can all be removed from the joint body, and the removed members can be reused or recycled for each material. Easy.

In the above invention, the nut member preferably has a tapered surface that allows the retainer to have a reduced diameter.
Further, in the present invention, the nut member may be formed with a concave recess that engages one end of the retainer and does not come into contact with the retainer other than the retaining portion.

  According to the corrugated pipe joint according to claim 1 or claim 3 of the present invention, when the corrugate pipe is inserted, the tip of the corgate pipe moves the movable member to the back side of the joint body, and the elastic member is moved from the compressed state. Let open. The urging force of the elastic member compresses the seal member to improve the seal surface pressure with the corrugate tube, and reduces the diameter of the retainer to engage with the corgate tube. Therefore, the construction work can be completed only by inserting the corrugate pipe, and the sound and response when the elastic member is released from the compressed state can be surely recognized. Further, since the retainer does not reduce the diameter while the elastic member is in the compressed state, the corrugate tube can be easily pulled out.

  According to the corrugated pipe joint of the fourth aspect, when the disassembly ring is removed and the nut member is slid, the locking ring moves to the avoidance groove, and the locking state between the joint body and the nut member is released. The When the corrugate tube is pulled out in this state, the nut member, retainer, seal member, and spring pack can all be removed from the joint body, and the removed members can be reused or recycled for each material. Easy.

[First Embodiment]
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a half sectional view of an embodiment of the corrugate pipe joint of the present invention, FIG. 2 is a perspective view of an embodiment of a holding member, FIG. 3 is a perspective view of an embodiment of an elastic member and a holding means, FIG. 4 is a perspective view of an embodiment of the elastic member, FIG. 5 is a half sectional view of the corrugate pipe joint of the present invention in the middle of insertion of the corgate pipe, and FIG. 6 is a corrugate pipe connected to the corgate pipe joint of the present invention. The half sectional view of the state where construction was completed is shown. FIG. 7 is a half sectional view showing a state when the corrugate pipe joint of the present invention is exposed to high temperature.

  As shown in FIG. 1, the corrugate pipe joint 1 includes a joint body 10 having a through hole portion 16 into which the corgate pipe T is inserted from one end side, and the elastic member 71 in a compressed state in order from the back side to the through hole portion 16. Holding means 70, a seal member 40 slidably disposed in the through-hole portion 16, a retainer 50 having a claw portion 52 that engages with the corrugate tube T, and a head portion 21 having a large diameter on one side. An insertion portion 24 having a small diameter is formed on the other side, and the insertion portion 24 has a push nut 20 that is inserted into the through hole portion 16 of the joint body 10. A male threaded portion 14 for connecting to another piping member and a tool engaging portion 15 for screwing the male threaded portion 14 into the other piping member are formed on the outer surface of the joint body 10 at the other end side. ing.

  The through hole portion 16 of the joint body 10 is formed with a locking step portion 18a and an avoiding groove 18b connected to the locking step portion 18a and having a larger diameter than the locking step portion 18a. On the other hand, a locking groove 25 is formed in the insertion portion 24 of the push nut 20. And the stop ring 61 is arrange | positioned so that the latching step part 18a and the latching ditch | groove 25 may be straddled. The stop ring 61 is a metal C-shaped ring having elasticity. When the insertion portion 24 of the push nut 20 is inserted into the through hole portion 16 of the joint body 10, the stop ring 61 is retracted and stored in the locking groove 25. However, when the position reaches the position of the locking step 18a, the diameter of the joint is slightly increased, whereby the joint body 10 and the push nut 20 are connected in advance.

  A disassembly ring 63 having a predetermined thickness is sandwiched between one end face of the joint body 10 and the head portion 21 of the push nut 20. When the disassembly ring 63 is removed, the disassembly ring The push nut 20 can be pushed into the through hole portion 16 of the joint body 10 by the thickness of 63. Then, the stop ring 61 moves from the position of the locking step portion 18a to the avoidance groove 18b, and the stop ring 61 is expanded here, so that the connection between the joint body 10 and the push nut 20 is released. As a result, the joint body 10 and the push nut 20 can be disassembled.

  A tapered inner surface 28 is formed on the inner surface side of the insertion portion 24 of the push nut 20 so as to increase in diameter toward the tip. The tapered outer surface 54 is formed so as to face the tapered inner surface 28, and the corrugate is formed on the inner diameter side. A retainer 50 having a claw 52 that engages with a trough T4 of the tube T is disposed. And the internal diameter of the nail | claw part 52 of this retainer 50 is made larger than the external shape of the corrugate pipe | tube T in an unloaded state. Therefore, at the stage of inserting the corrugate tube T, the claw portion 52 of the retainer 50 can be smoothly inserted without being engaged with the peak portion T2 of the corgate tube T.

  The retainer 50 is a ring-shaped member disposed between the seal member 40 and the push nut 20 in the through hole portion 16 of the joint body 10. The rear part is an integral ring, and the front part is divided into a plurality of segments (eight in one example) by an axially divided part 53. At the tip of each segment, a claw portion 52 that protrudes radially inward is provided. In the retainer 50, for example, the base is made of plastic and the claw portion 52 is made of brass, and both are integrally molded.

  Next, the seal member 40 is a ring-shaped rubber elastic member that seals the outer peripheral surface of the corrugate tube T. The outer diameter side is set to be larger than the inner diameter of the inner peripheral surface of the through hole 16 of the joint main body 10. The joint body 10 is press-fitted so as to be in airtight contact with the through-hole portion 16, and is disposed so as to be movable in the axial direction along the inner peripheral surface of the through-hole portion 16 of the joint body 10. On the other hand, the inner diameter side is provided slightly smaller than the outer diameter of the corrugate tube T. The seal member 40 is preferably made of nitrile butadiene rubber (NBR) in consideration of gas resistance because it is necessary to maintain the seal performance for a long period of time.

  A metal guide 42 having an L-shaped cross section is bonded and integrated on one end side of the seal member 40, and the metal guide 42 is provided with a fireproof packing 44.

  The fireproof packing 44 fills a mold with, for example, a rubber compound obtained by kneading raw material rubber, a graphite intercalation compound that is thermally expanded in a non-foamed state, and a filler, a softening material, a vulcanizing agent, etc. And then press vulcanized. The graphite intercalation compound is, for example, a compound in which silver sulfate is bonded between layers obtained by reacting sulfuric acid with graphite (a hexagonal crystal of carbon in which six-membered ring polymer layers are overlapped in layers), and is 170 ° C. or more When heated to 800 ° C to 1000 ° C, the apparent volume increases to 100 to 250 times when heated to 800 ° C to 1000 ° C. As the raw rubber, natural rubber (NR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene rubber (EPDM), silicone rubber (Q) and the like can be used.

  When the corrugate pipe joint 1 is exposed to a high temperature due to a fire or the like, the seal member 40 is burned out, but the fireproof packing 44 is thermally expanded to fill the space between the joint body 10 and the corrugate pipe T, and the corgate pipe Sealing the outer diameter of T prevents gas leaks from occurring during a fire and increasing damage. In particular, the metal guide 42 has an outer diameter dimension that is locked to the step portion 19 of the through hole 16 of the joint body 10, and the metal guide 42 is locked to the step portion 19 when the fireproof packing 44 expands. , The fireproof packing 44 expands toward the inlet side of the through-hole 16 (left side from the metal guide 42 in the figure) and seals the seal surface. It is easy to secure pressure.

Further, as shown in FIG. 7, when the corrugate pipe joint 1 is exposed to a high temperature due to a fire or the like, the metal guide 42 is stretched by the elastic member 71 so that the inner side of the through hole portion 16 of the joint body 10 (in the drawing). (Right direction) can be restricted. In this case, the metal guide 42 does not need to have an outer dimension that is locked to the step portion 19. Then, since the seal member disappears, the elastic member 71 further extends to support the metal guide 42. The fireproof packing 44 is restricted from expanding to the back side of the through hole 16 and expands toward the inlet side (left side from the metal guide 42 in the figure), so that it is easy to ensure the seal surface pressure.
In the embodiment in which expansion of the fireproof packing 44 is restricted by the extension of the elastic member 71 shown in FIG. 7, it is not always necessary to interpose the metal guide 42 between the seal member (airtight packing) 40 and the fireproof packing 44. For example, the seal member (airtight packing) 40 and the fireproof packing 44 can be directly bonded. In this case, when the seal member (airtight packing) 40 disappears due to a fire or the like, the elastic member 71 expands, and the back surface of the support portion 72a of the holding member 72 restricts the expansion of the fireproof packing 44 toward the back side of the through hole 16. Will be.

  In particular, in a normal construction state, the seal member 40 hermetically seals with the inner peripheral surface of the through hole portion 16 of the joint body 10, so that the outer peripheral surface of the seal member 40 and the inner peripheral surface of the through hole portion 16 are sealed. A larger contact area is preferred. Even when the seal member disappears, the elastic member 71 supports the metal guide 42, and thus the movement of the metal guide 42 to the back side of the through hole portion 16 is restricted without providing the step portion 19. Therefore, in the embodiment in which the step portion 19 is not provided, a large contact area between the outer peripheral surface of the seal member 40 and the inner peripheral surface of the through hole portion 16 can be provided.

  As shown in FIG. 2, the holding member 72 constituting the holding means 70 has a ring-shaped support portion 72a made of a metal member, and a locking projection 73 formed at the tip protruding from the support portion 72a. . As shown in FIG. 3, the holding means 70 is locked to the holding member 72, the elastic member 71 inserted so that one end is supported by the support portion 72 a of the holding member 72, and the locking protrusion 73. It consists of a ring-shaped stopper 75 and a movable member 80 inserted into the inner peripheral surface of the holding member 72. And the latching convex part 73 is hold | maintained at the outer peripheral surface of the movable member 80 so that diameter reduction is impossible, and the elastic member 71 is maintained in the compression state.

  The movable member 80 is a cylindrical resin member, and includes a thick part 81 fitted to the inner peripheral surface of the holding member 72 and a thin part 82 extended to the inside of the seal member 40. That is, the thick-walled portion 81 supports the locking projection 73 of the holding member 72 so that the diameter of the retaining member 72 cannot be reduced, and the tip of the corrugated tube into which the thin-walled portion 82 is inserted (described later) comes into contact. This is the part that receives the insertion pushing force.

  The elastic member 71 is formed of a stainless steel coil spring. In the embodiment, a coil spring having a circular cross section is shown, but a deformed cross section spring (square spring) 71A shown in FIG. 4 (a), a conical coil spring 71B shown in FIG. 4 (b), and FIG. 4 (c). A coiled wave spring 71C shown in FIG. 4, a combination of a corrugated washer 71D1 and a flat washer 71D2 shown in FIG. 4D, and a micro coil spring 71E shown in FIG. It is also possible to employ a bamboo shoot spring 71F shown in FIG.

  Of these, the conical coil spring 71B, the coiled wave spring 71C, the combination of the corrugated washer 71D1 and the flat washer 71D2, and the bamboo spring 71F are beneficial in reducing the size of the elastic member, and the coiled wave spring 71C. , And the minute coil spring 71E is advantageous in that it can bias a uniform reaction force on the circumference.

  In particular, the coiled wave spring 71C can easily select a spring constant depending on its shape, can be shortened in overall length as compared with a general coil spring, and can urge a uniform reaction force on the circumference. This is preferable because the corrugate pipe joint can be made compact and the seal member 40 can be uniformly compressed.

  Further, an O-ring groove 23 is formed in the insertion portion 24 of the push nut 20, and a watertight O-ring 47 is attached thereto. The insertion hole 22 of the push nut 20 is provided with a watertight packing 48. Accordingly, entry of moisture, dust, and the like from the outside is prevented inside the joint for the corrugate pipe.

Further, the push nut 20 is provided with a vent hole 26 penetrating from the insertion hole portion 22 to the insertion portion 24, and a selectively permeable member 60 is provided.
The selectively permeable member 60 is made of a sheet material including a continuous porous film formed by pressing and solidifying the tetrafluoroethylene resin powder, and has continuous fine pores of 0.1 to 5 μm, A gas having a characteristic of allowing a gas such as air or water vapor to pass through but repelling a liquid such as water can be cited. Or it is a porous body having continuous pores formed from a thermoplastic resin powder such as polyethylene, polypropylene, polymethyl acrylate, polystyrene, ethylene vinyl acetate copolymer, tetrafluoroethylene polymer, etc., or polyvinyl alcohol and formaldehyde You may use the porous sheet material etc. which have the continuous pore shape | molded by making this react with an acid catalyst.

These selectively permeable members have air permeability and moisture permeability that allow gas such as air and water vapor to pass therethrough, while also having waterproof properties that do not allow liquid such as water and chemicals to pass through. Excellent chemical resistance, heat resistance, weather resistance, etc. Therefore, the permeation and penetration of solids (such as dust) and liquids (water, dew, etc.) from the outside into the joint are prevented, and moisture and dust are prevented from entering from the outside for a long time after piping construction, and the interior is corroded. The problem does not occur.

  Specifically, the inner surface of the resin coating layer T6 coated on the outer periphery of the corrugate tube T is provided with irregularities (not shown) in the longitudinal direction of the tube. When struck, the leaked gas is guided along the unevenness to the selectively permeable member 60, and the selectively permeable member 60 allows gas such as gas and air to pass through. The presence or absence of leakage can be detected by using a gas leak sensor or the like.

  Next, the procedure for connecting the corrugate pipe T to the corgate pipe joint 1 and the operation thereof will be described in detail with reference to FIGS.

  As shown in FIG. 5, when the corrugate pipe T is inserted into the corrugate pipe joint 1, the inner diameter of the retainer 50 is made larger than the outer diameter of the corgate pipe T. Therefore, the corgate pipe T is smoothly inserted up to the metal guide 42. be able to. When the corrugate tube T is further pushed in while feeling a slight response on the inner peripheral surface of the seal member 40, the tip of the corgate tube T comes into contact with the end surface of the thin portion 82 of the movable member 80.

  When further force is applied, the movable member 80 slides in the depth direction of the through-hole portion 16 with the insertion of the corrugate tube, and the thick portion 81 of the movable member 80 is separated from the inner peripheral surface of the holding member 72. Then, as shown in FIG. 6, the locking projection 73 of the holding member 72 is reduced in diameter, and the stopper 75 is detached from the locking projection 73. At the same time, the elastic member 71 extends, one end contacts the contact step portion 11 of the through hole portion 16 via the stopper 75, and the other end presses the seal member 40 via the holding member 72, and the through hole portion 16. Slide toward the entrance. Moreover, the metal guide 42 and the fireproof packing 44 will also slide.

  The metal guide 42 presses the claw portion 52 of the retainer 50. The retainer 50 has a tapered outer surface 54 formed on the back side thereof and is pressed against the tapered inner surface 28 of the push nut 20, so that the claw portion 52 is reduced in diameter and engaged with the valley portion of the corrugated tube T. Thus, the corgate pipe T and the corrugate pipe joint 1 are firmly connected, and the construction is completed.

  That is, the construction work is completed simply by inserting the corrugate tube T, and the sound and response when the elastic member 71 is released from the compressed state can be reliably recognized.

  Further, the seal member 40 positioned between the retainer 50 and the holding member 72 is compressed in the axial direction under the urging force of the elastic member 71 to improve the seal surface pressure between the seal member 40 and the corrugate tube T. Therefore, for example, even a corrugate tube having a slight flatness or deformation can be hermetically sealed. Further, the elastic member 71 is set so as to be applied with an urging force even in the extended state as shown in FIG. 6, so that the seal surface pressure is maintained above a certain level even if the permanent deformation of the seal member 40 proceeds. can do. In particular, the retainer 50 is reduced in diameter by the tapered inner surface 28 of the push nut 20, and the claw portion 52 is engaged with the valley portion of the corrugate tube, so that the retainer 50 is fixed in this state and sealed by the urging force of the elastic member 71. The member 40 can be reliably compressed.

  Now, in the construction procedure of the corrugate tube, it is fundamental to cut the trough portion of the corgate tube so as to be perpendicular to the tube axis (see, for example, FIG. 6). However, the end of the corrugate tube may be cut slightly diagonally or may be cut at the peak. Alternatively, even if the corrugate pipe is cut according to the construction procedure, the corrugate pipe may have to be inserted slightly obliquely with respect to the pipe joint in a narrow construction site.

  Even in such a case, the movable member can be replaced with a movable member 80A as shown in FIG. 16A is a perspective view of the movable member 80A, and FIG. 16B is a partial cross-sectional view in which the movable member 80 in FIG. 1 is replaced with the movable member 80A.

  As shown in the figure, the movable member 80A is a cylindrical resin member, a thick portion 81A fitted to the inner peripheral surface of the holding member 72, and a thin portion 82A extended in the axial direction from the thick portion 81A. And a contact part 83A formed at the tip of the thin part 82A, and a slit 84A cut out from the contact part 83A toward the thin part 82A. The contact part 83A has substantially the same outer diameter as the thick part 81A.

  When the corgate tube T is inserted, the tip of the corgate tube T comes into contact with the contact portion 83A, and the movable member 80A is slid in the depth direction of the joint body 10 to be driven. Then, the locking projection 73 of the holding member 72 is reduced in diameter, and the stopper 75 is detached from the locking projection 73. At the same time, the elastic member 71 extends, one end contacts the contact step portion 11 of the through hole portion 16 via the stopper 75, and the other end presses the seal member 40 via the holding member 72, and the through hole portion 16. Slide toward the entrance.

  At this time, since the movable member 80A has the slit 84A cut out from the contact portion 83A toward the thin portion 82A, the contact portion 83A is contracted by the diameter reducing force of the locking projection 73. .

  That is, since the contact portion 83A has substantially the same outer diameter as the thick portion 81A, when the tip of the corrugate tube T is cut slightly obliquely or at the peak portion, or the corgate tube Even if the cutting of the corrugate pipe T is carried out in a narrow construction site and the corrugate pipe T has to be inserted slightly obliquely with respect to the corrugate pipe joint 1, Regardless of the portion, the tip portion can reliably press the movable member 80A.

  Further, since the movable member 80A is made of resin and the movable member 80A has a slit 84A cut out from the contact portion 83A toward the thin portion 82A, the contact portion is reduced by the reduced diameter force of the locking convex portion 73. The diameter of 83A is reduced, and there is no possibility of inhibiting the stopper 75 from being detached from the locking projection 73.

  Next, a procedure for disassembling the connection between the corrugate pipe joint 1 and the corgate pipe T and the operation thereof will be described in detail with reference to FIGS. FIG. 8 is a half cross-sectional view of the state where the disassembly ring is removed and the push nut is slid, and FIG. 9 is a judgment plane view of the state where the corrugate pipe is pulled out from the joint body.

  First, the disassembling ring 63 attached between one end face of the joint body 10 and the head portion 21 of the push nut 20 is removed, and the push nut 20 is pushed into the through hole portion 16 of the joint body 10. Then, as shown in FIG. 7, the stop ring 61 moves from the position of the locking step portion 18 a to the avoidance groove 18 b, and the diameter of the stop ring 61 increases here, so that the coupling body 10 and the push nut 20 are connected. Opened.

  Next, when the corrugate tube T is pulled out, the push nut 20, the retainer 50, the seal member 40, etc. are extracted from the joint body 10 together with the corrugate tube T so as to be pushed out by the elastic member 71 as shown in FIG. 9. It is. Further, the elastic member 71 and the movable member 80 can be easily taken out.

  Since the seal member 40, the retainer 50, and the push nut 20 can be removed from the corrugate tube T in this order, the stainless steel corrugate tube T, the brass fitting body 10 and the push nut 20, the synthetic rubber seal member 40, and the like. Each material can be sorted and easily recycled. Further, the parts constituting the corgate joint can be reassembled and reused.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS. 10 and 11. FIG. 10 is a half sectional view of the second embodiment of the corrugate pipe joint of the present invention, and FIG. 11 is a half sectional view of the state in which the corgate pipe is pulled out from the joint body.
In addition, the same structure as the joint for corrugate pipes shown in FIG. 1 to FIG.

  As shown in FIG. 10, the corrugate pipe joint 1A includes a joint body 10 having a through hole portion 16 into which the corrugate pipe T is inserted from one end side, and a coiled wave spring (elastic) in order from the back side to the through hole portion 16. Member) holding means 70A that holds 71C in a compressed state, seal member 40 that is slidably disposed in through-hole portion 16, retainer 50A having a claw portion 52A that engages with corrugate tube T, and a large diameter on one side The formed head portion 21 and the insertion portion 24 having a small diameter are formed on the other side, and the insertion portion 24 has a push nut 20 that is inserted into the through hole portion 16 of the joint body 10.

  The retainer 50A has a ring shape in which one end portion 55 has a notch, and the front portion is divided into a plurality of segments (eight in one example) by an axially divided portion (not shown) to form a claw portion 52A. . The whole is made of metal using a press or the like.

  Further, one end 55 of the retainer 50A is locked to an inner surface locking groove 27 formed on the inner peripheral surface of the front end of the push nut 20A. Further, a Nusumi recess 29 is formed adjacent to the inner surface locking groove 27 of the push nut 20A.

  When the corrugate tube T is inserted, the movable member 80 slides in the depth direction of the through hole portion 16, and the thick portion 81 of the movable member 80 is separated from the inner peripheral surface of the holding member 72. Then, the locking projection 73 of the holding member 72 is reduced in diameter, and the stopper 75 is detached from the locking projection 73. At the same time, the coiled wave spring 71C extends, one end contacts the contact step 11 of the through hole 16 via the stopper 75, and the other end presses the seal member 40 via the holding member 72 and passes through. Slide toward the entrance of the hole 16. Moreover, the metal guide 42 and the fireproof packing 44 will also slide.

  Then, the metal guide 42 presses the claw portion 52A of the retainer 50A. Since one end 55 of the retainer 50A is locked in the inner surface locking groove 27 of the push nut 20A, the claw 52A is reduced in diameter with the one end 55 as a fulcrum, and is engaged with the valley of the corrugate tube T. As a result, the corgate pipe T and the corrugate pipe joint 1A are firmly connected, and the construction is completed.

  That is, the construction work can be completed simply by inserting the corrugate tube T, and the sound and response when the coiled wave spring 71C is released from the compressed state can be reliably recognized.

  Further, the seal member 40 positioned between the retainer 50A and the holding member 72 is compressed in the axial direction under the urging force of the coiled wave spring 71C, and the seal surface pressure between the seal member 40 and the corrugate tube T is improved. Therefore, for example, even a corrugate tube having a slight flatness or deformation can be hermetically sealed. Further, by setting the coiled wave spring 71C so that an urging force is applied even in the extended state as shown in FIG. 10, even if the permanent deformation of the seal member 40 progresses, the seal surface pressure exceeds a certain level. Can be maintained.

  Further, since the recess recess 29 is formed adjacent to the inner surface locking groove 27 of the push nut 20A, when a force in the pulling direction is applied to the corgate pipe T, the retainer 50A uses the end 55 as a fulcrum to support the recess recess 29. The claw portion 52A can be further deformed in the direction of diameter reduction, and the corrugate tube T can be more securely prevented from being pulled out.

  On the other hand, when a force in the pushing direction is applied to the corrugate tube T, the claw portion 52A is in contact with the metal guide 42, so that the claw portion 52A is not expanded in diameter and the corgate tube T is not pushed in. .

  Further, since the retainer 50A is engaged with the inner surface locking groove 27 of the push nut 20A and the valley portion of the valley portion T4 of the corgate pipe T, the retainer 50A is fixed in this state, and the urging force by the coiled wave spring 71C. Thus, the seal member 40 can be reliably compressed.

  The procedure for disassembling the connection between the corrugate pipe joint 1A and the corgate pipe T is the same as in the case of the corgate pipe joint 1. The disassembly ring 63 attached between one end face of the joint body 10 and the head portion 21 of the push nut 20A is removed, and the push nut 20A is pushed into the through hole portion 16 of the joint body 10. Then, the stop ring 61 moves from the position of the locking step portion 18a to the avoidance groove 18b, and the stop ring 61 is expanded here, so that the connection between the joint body 10 and the push nut 20A is released.

  Next, when the corrugate tube T is pulled out, the push nut 20A, the retainer 50A, the seal member 40 and the like are removed from the joint body 10 together with the corgate tube T so as to be pushed out by the coiled wave spring 71C as shown in FIG. Extracted. Further, the coiled wave spring 71C and the movable member 80 can be easily taken out.

  Since the seal member 40, the retainer 50A, and the push nut 20A can be removed from the corrugate tube T in this order, the stainless steel corrugate tube T, the brass fitting body 10 and the push nut 20A, the synthetic rubber seal member 40, and the like. Each material can be sorted and easily recycled. Further, the parts constituting the corgate joint can be reassembled and reused.

[Third Embodiment]
Next, a third embodiment will be described with reference to FIGS. FIG. 12 is a half sectional view of the third embodiment of the corrugate pipe joint of the present invention, FIG. 13 is a perspective view of one embodiment of the holding member in the third embodiment of the corgate pipe joint of the present invention, and FIG. FIG. 15 is a half sectional view showing a state in which the construction of the third embodiment of the corrugate pipe is completed to the corrugate pipe joint of the present invention, and FIG. 15 is a half sectional view showing a state in which the corgate pipe is pulled out from the joint body.
In addition, the same structure as the joint for corrugate pipes shown in 1st Embodiment and 2nd Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  As shown in FIG. 12, the corrugate pipe joint 1B includes a joint body 10 having a through hole portion 16 into which the corgate pipe T is inserted from one end side, and a coiled wave spring (elastic) in order from the back side to the through hole portion 16. Member) holding means 70B that holds 71C in a compressed state, seal member 40 that is slidably disposed in through-hole portion 16, retainer 50A having a claw portion 52A that engages with corrugate tube T, and a large diameter on one side The formed head portion 21 and the insertion portion 24 having a small diameter are formed on the other side, and the insertion portion 24 has a push nut 20 </ b> A adapted to be inserted into the through hole portion 16 of the joint body 10.

  The holding means 70B includes a holding member 72B and a stopper 75B, and is fitted into the inner peripheral protrusion 11a of the joint body 10B. As shown in FIG. 13, the holding member 72 </ b> B is a ring-shaped member as a whole, and has a U-shaped cross section so that the elastic member 71 </ b> C is accommodated therein. A locking projection 73B is formed at the tip of the outer ring of the double ring, and the inner ring of the double ring extends to the inner periphery of the seal member 40. The elastic member 71C is accommodated in a compressed state so that one end of the elastic member 71C is supported by the back end of the U-shape, and the stopper 75B locked to the locking projection 73B supports the other end of the elastic member 71C. Has been.

  Then, as shown in FIG. 14, when the corgate pipe T is inserted, the tip of the corgate pipe T presses the inner ring of the holding member 72B, and the holding member 72B is moved to the holding member accommodating portion 11b at the back end of the joint body 10B. Push it. Then, the diameter of the outer ring side of the holding member 72B is expanded, and the stopper 75B is detached from the locking projection 73B. At the same time, the elastic member 71 </ b> C extends, presses the seal member 40, and slides toward the inlet of the through-hole portion 16. Moreover, the metal guide 42 and the fireproof packing 44 will also slide.

  Then, the metal guide 42 presses the claw portion 52A of the retainer 50A. Since one end 55 of the retainer 50A is locked in the inner surface locking groove 27 of the push nut 20A, the claw 52A is reduced in diameter with the one end 55 as a fulcrum, and is engaged with the valley of the corrugate tube T. As a result, the corgate pipe T and the corrugate pipe joint 1 are firmly connected, and the construction is completed.

  That is, the construction work can be completed simply by inserting the corrugate tube T, and the sound and response when the elastic member 71C is released from the compressed state can be reliably recognized.

  Further, since the seal member 40 is compressed in the axial direction by receiving the urging force of the elastic member 71C and improves the seal surface pressure between the seal member 40 and the corrugate tube T, for example, the corrugate having some flatness or deformation. Even a tube can be hermetically sealed. In addition, the elastic member 71C can maintain the sealing surface pressure above a certain level even if the permanent deformation of the seal member 40 progresses by setting the elastic member 71C to be applied with an urging force even in the extended state. .

  Further, since the recess recess 29 is formed adjacent to the inner surface locking groove 27 of the push nut 20A, when a force in the pulling direction is applied to the corgate pipe T, the retainer 50A uses the end 55 as a fulcrum to support the recess recess 29. The claw portion 52A can be further deformed in the direction of diameter reduction, and the corrugate tube T can be more securely prevented from being pulled out.

  On the other hand, when a force in the pushing direction is applied to the corrugate tube T, the claw portion 52A is in contact with the metal guide 42, so that the claw portion 52A is not expanded in diameter and the corgate tube T is not pushed in. .

  Furthermore, since the retainer 50A is engaged with the inner surface locking groove 27 of the push nut 20A and the valley portion of the valley portion T4 of the corrugate tube T, the retainer 50A is fixed in this state and sealed by the urging force of the elastic member 71C. The member 40 can be reliably compressed.

  The procedure for disassembling the connection between the corrugate pipe joint 1B and the corgate pipe T is the same as in the case of the corgate pipe joint 1. The disassembly ring 63 mounted between one end face of the joint body 10 and the head portion 21 of the push nut 20A is removed, and the push nut 20A is pushed into the through hole portion 16 of the joint body 10B. Then, the stop ring 61 moves from the position of the locking step portion 18a to the avoidance groove 18b, and the stop ring 61 is expanded here, so that the connection between the joint body 10 and the push nut 20A is released.

  Next, as shown in FIG. 15, when the corrugate tube T is pulled out, the push nut 20A, the retainer 50A, the seal member 40 and the like are extracted from the joint body 10 together with the corgate tube T so as to be pushed out by the elastic member 71C. It is. Further, the elastic member 71C and the holding member 72B can be easily taken out.

  Since the seal member 40, the retainer 50A, and the push nut 20A can be removed from the corrugate tube T in this order, the stainless steel corrugate tube T, the brass fitting body 10 and the push nut 20A, the synthetic rubber seal member 40, and the like. Each material can be sorted and easily recycled. Further, the parts constituting the corgate joint can be reassembled and reused.

As described above, according to the corrugate fitting according to the present invention,
(1) When the corgate pipe is not inserted into the predetermined position, the retainer (prevention member) is not engaged with the corrugate pipe, and when the corgate pipe is inserted into the predetermined position, the elastic member is released from the compressed state. Thus, the retainer is engaged with the corrugate tube, and the sound and response when the elastic member repels can be reliably recognized.
(2) Since the elastic member released from the compressed state compresses the seal member at the same time, the outer peripheral surface of the corgate tube can be reliably sealed even if the corgate tube has some flatness or deformation. it can.
(3) Further, the through hole portion 16 of the joint body has a locking step portion 18a and an avoiding groove 18b that is continuous with the locking step portion 18a and has a larger diameter than the locking step portion 18a. On the side, a locking groove 25 is formed, and a stop ring 61 is disposed so as to straddle the locking step 18a and the locking groove 25 to lock the joint body 10 and the nut member 20, Since the head portion 21 is formed on the other end side of the nut member 20 and the disassembly ring 63 is provided between the head portion 21 and the end portion of the joint body 10, the disassembly ring 63 is removed and the nut member is removed. When 20 is pushed in, the connection between the joint body 10 and the nut member 20 is released, and the corrugate pipe can be disassembled together with the parts constituting the corgate pipe joint. Therefore, each member can be easily recycled and reused.

  The shape of the corrugated pipe joint according to the present invention is not limited to a single screw socket having a male thread portion at one end, and may have both sockets, elbows, tees, or female threads. Further, the joint structure of the present invention can be integrally provided at the end of a device such as a gas stopper or a gas meter.

It is a half sectional view of one example of the corrugate pipe joint of the present invention. It is a perspective view of one Example of a holding member. It is a perspective view of one Example of an elastic member and a holding means. It is a perspective view of embodiment of an elastic member. It is a half sectional view of the state in the middle of insertion of a corrugate pipe into a corgate pipe joint of the present invention. FIG. 6 is a half cross-sectional view showing a state in which the construction for connecting the corrugate pipe to the corrugate pipe joint of the present invention is completed. It is a half sectional view showing a state when the corrugate pipe joint of the present invention is exposed to high temperature. It is a half sectional view of a state where the disassembly ring is removed and the push nut is slid. It is a judgment surface figure in the state where a corgate pipe was pulled out from a joint main part. It is a half sectional view of the 2nd example of a corrugate pipe joint of the present invention. In the 2nd Example of the corrugated pipe coupling of this invention, it is a half cross-sectional view of the state which pulled out the corrugated pipe from the coupling main body. It is a half sectional view of the 3rd example of the corrugate pipe joint of the present invention. It is a perspective view of one Example of the holding member in the 3rd Example of the corrugate pipe joint of this invention. It is a half sectional view of the state where connection construction of the 3rd example of the corrugate pipe was completed to the corgate pipe joint of the present invention. FIG. 5 is a half cross-sectional view of a state in which a corgate pipe is pulled out from a joint body. FIG. 2 shows another form of the movable member, (a) is a perspective view of the movable member, and (b) is a partial sectional view in which the movable member 80 in FIG. 1 is replaced with a movable member 80A.

Explanation of symbols

1, 1A, 1B: Corrugate pipe joint,
10: Joint body, 14: Male thread part, 15: Tool hook part, 16: Through hole part, 18a: Locking step part, 18b: Avoidance groove, 19: Step part,
20, 20A: push nuts, 21: head portion, 22: insertion hole portion, 23: O-ring groove, 24: insertion portion, 25: locking groove, 26: vent hole, 27: inner surface locking groove, 28: Tapered inner surface, 29: Nusumi recess,
40: seal member (airtight packing), 42: metal guide, 44: fireproof packing, 47: watertight O-ring, 48: watertight packing,
50, 50A: Retainer, 52, 52A: Claw part, 53: Divided part, 54: Tapered outer surface, 55: One end part,
60: selective permeability member, 61: stop ring, 63: ring for disassembly,
70, 70A, 70B: holding means,
71: Elastic member, 71A: Deformed section spring (square spring), 71B: Conical coil spring, 71C: Coiled wave spring, 71D1: Wave washer, 71D2: Plain washer, 71E: Micro coil spring, 71F: Bamboo spring 72: Holding member, 72a: support portion, 73: locking projection, 75: stopper,
80, 80A: movable member, 81, 81A: thick part, 82, 82A: thin part, 83A: contact part, 84A: slit,
T: Colgate tube, T2: Mountain, T4: Valley, T6: Resin coating layer,

Claims (6)

A joint body having an inner hole into which the corgate pipe is inserted;
An elastic member capable of expanding and contracting in the axial direction of the inner hole, holding means for holding the elastic member in a compressed state, and a seal member slidably disposed in the inner hole;
A retainer that has a claw portion that engages with the corrugate tube, and is disposed in a state in which an inner diameter of the claw portion is larger than an outer diameter of the corrugate tube;
A nut member connected to the joint body;
By the insertion of the corrugate tube, the holding means releases the compressed state of the elastic member, and with the extension of the elastic member, the seal member is compressed in the axial direction, and the retainer is reduced in diameter so that the corrugate Configured to engage the tube,
The holding means supports a ring-shaped support portion that supports one end of the elastic member, a holding member having a locking projection formed at a tip protruding from the support portion, and the other end of the elastic member, A stopper locked to the locking protrusion, and a movable member that is inserted through the inner hole of the holding member and restricts the diameter of the locking protrusion to the inner diameter side ,
The seal member includes an airtight packing and a fireproof packing, and when the airtight packing disappears, the fireproof packing is restricted from expanding to the inner hole back side of the joint body by extension of the elastic member. Corrugate fitting characterized by.   The movable member has a thick portion that restricts the diameter of the locking projection to the inner diameter side, and an abutting portion that is pressed against the corrugate tube, and when the corrugate tube is inserted, the movable member is The corrugated pipe joint according to claim 1, wherein the joint body is configured to move in the depth direction of the joint body and to reduce the diameter of the contact portion. A joint body having an inner hole into which the corgate pipe is inserted;
An elastic member capable of expanding and contracting in the axial direction of the inner hole, holding means for holding the elastic member in a compressed state, and a seal member slidably disposed in the inner hole;
A retainer that has a claw portion that engages with the corrugate tube, and is disposed in a state in which an inner diameter of the claw portion is larger than an outer diameter of the corrugate tube;
A nut member connected to the joint body;
By the insertion of the corrugate tube, the holding means releases the compressed state of the elastic member, and with the extension of the elastic member, the seal member is compressed in the axial direction, and the retainer is reduced in diameter so that the corrugate Configured to engage the tube,
The holding means has a ring-shaped support portion that supports one end of the elastic member, and is a double annular member extended in one direction from the inner and outer circumferences of the support portion, and the tip of the outer ring of the double ring A locking projection is formed on the inner ring, the inner ring of the double ring extends to the inner periphery of the seal member, and the stopper that supports the other end of the elastic member and is locked to the locking projection. And consist of
The outer ring of the holding member is inserted into the inner peripheral surface of the joint body ,
The seal member includes an airtight packing and a fireproof packing, and when the airtight packing disappears, the fireproof packing is restricted from expanding to the inner hole back side of the joint body by extension of the elastic member. Corrugate fitting characterized by.   The inner hole of the joint body has a locking groove and an avoidance groove that is continuous with the locking groove and has a larger diameter than the locking groove, and an outer circumferential groove is formed on the outer diameter side of the nut member. A stop ring is disposed so as to straddle the locking groove and the outer peripheral groove to lock the joint body and the nut member, and a large-diameter portion is formed on the other end side of the nut member, The corrugated pipe joint according to any one of claims 1 to 3, further comprising a disassembly ring between the large-diameter portion and an end portion of the joint body. The corrugate fitting according to any one of claims 1 to 4 , wherein the nut member has a tapered surface that allows the retainer to have a reduced diameter. The corrugate pipe according to any one of claims 1 to 4 , wherein the nut member has one end of the retainer, and is formed with a concave recess that does not come into contact with the retainer except for the engaging portion. Fittings.

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