JP6294986B1 - Fitting for straight pipe - Google Patents

Abstract

To provide a pipe joint that can be connected and disconnected without damaging a straight pipe and can be repeatedly connected and disconnected. In a joint for straight pipe pipe 10 in which the holding is completed by inserting the straight pipe P, a slide ring 14 operates in the axial direction integrally with the straight pipe P when the straight pipe P is inserted. The projecting portion 26 of the slide ring 14 rides on the passive portion 22 of the main body 12, and the holder 18 integrated with the slide ring 14 by the pin 16 operates in the direction of the coaxial line. 20 receives compressive force by the pressing part 24 of the main body 12, and the straight pipe P is held by the compressive force of the packing 20 by this. [Selection] Figure 1

Description

  The present invention relates to a joint for a straight pipe.

  Some straight pipe joints are designed to reduce damage to the connected straight pipe. For example, Patent Literature 1 discloses a pipe joint C in which damage to the pipe 1 is reduced by holding the pipe 1 to be connected by the fastening ring 5. More specifically, the pipe joint C is configured such that the pipe 1 is tightened by the tightening ring 5 so that the inner surface of the pipe 1 is in close contact with the seal member 4 and is in a sealed state. The pipe 1 is prevented from coming out of the pipe joint C by biting the pipe 1.

JP 2002-031282 A

  As described above, the pipe joint C is tightened radially inward by the fastening ring 5 in order to bring the inner surface of the pipe 1 into intimate contact with the seal member 4, and the retaining ring 8 is connected to the pipe 1 for retaining. Therefore, the pipe 1 cannot be completely prevented from being damaged. Further, in order to allow the pipe 1 to be inserted into the pipe joint C, the diameter-expanding piece 6 is detachably press-fitted so as to be held in a state where the diameter of the tightening ring 5 is expanded. In order to reuse the pipe joint C, the pipe joint C had to be disassembled and reassembled.

  Therefore, an object of the present invention is to provide a joint that can be repeatedly connected and disconnected without damaging the straight pipe.

That is, the present invention
A cylindrical main body having a cylindrical wall, a passive portion disposed on the cylindrical wall, a pressing portion disposed on an end opposite to the passive portion, and a long hole penetrating in the radial direction of the cylindrical wall When,
A contact end that is disposed inside the main body so as to be displaceable in the axial direction of the main body, receives a insertion force from the straight pipe and comes into contact with the straight pipe, and an engagement end opposite to the contact end. A slide ring provided with a protrusion that engages with the passive portion of the main body at the engagement end;
A connecting member disposed so as to penetrate the elongated hole of the main body and fixed to the outer peripheral portion of the slide ring in the axial direction;
A holder that is disposed outside the main body and engages with the connecting member to displace the main body together with the slide ring in the axial direction;
A pipe holding member made of an annular elastic member held inside the holder,
Due to the engagement between the passive portion and the protrusion, displacement of the slide ring with respect to the main body in the axial direction is suppressed,
When the straight pipe is inserted into the main body, the straight pipe pushes the contact end of the slide ring, and the slide ring is integrated with the connecting member and the holder in the insertion direction of the straight pipe. Holding force generated when the pipe holding member is compressed by the pressing portion of the main body and the inner peripheral surface of the pipe holding member is reduced in diameter and pressed against the outer peripheral surface of the straight pipe. The straight pipe is held by the connected state,
When the straight pipe held by the pipe holding member is pulled out from the main body, the holder is integrated with the connecting member and the slide ring by the holding force of the pipe holding member. The pipe pipe is displaced in the same direction as the drawing direction of the pipe, and the compression force of the pipe holding member by the pressing portion is reduced or released, the holding force is reduced, and the holding state of the straight pipe is released. Provided is a coupling.

  In the joint, by using an elastic member for holding the straight pipe, connection and disconnection can be performed without deformation and damage of the straight pipe. Further, the connection and disconnection can be repeated by the holding structure of the straight pipe using the elastic force when the elastic member is compressed by the main body.

  Specifically, a plurality of notches are formed at the engagement end of the slide ring so that the protrusion can be displaced in a radial direction intersecting the axial direction of the slide ring, and two or more notches are formed in the notch. The projecting portion gets over the groove provided in the passive portion of the main body and the pressing portion of the main body by the elastic force of the engagement end and the insertion force of the pushing operation of the straight pipe pipe by being divided into The projecting portion moves in the opposite direction and changes from the ready state to the connected state, and the projecting portion gets over the passive portion of the main body by the pulling action force of the straight pipe, and the pressing of the main body It can operate in the direction of the section and change from the connected state to the ready state.

  More specifically, the groove of the passive portion of the main body may have a screw structure, and the protrusion of the slide ring may be received by the screw structure.

  More specifically, by arranging the positions of the protrusions of the slide ring so as to match the pitches of the screws of the passive parts, it is possible to insert a straight pipe not only by pushing operation but also by rotating operation. Can do.

  More specifically, the shape of the pressing portion of the main body can be a shape in which the diameter increases toward the pipe holding member, and the end portion of the pipe holding member can be easily crushed inward in the radial direction.

  Embodiments of a joint for a straight pipe according to the present invention will be described below with reference to the accompanying drawings.

It is side surface sectional drawing of the joint for straight pipes which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing which shows the connection state of the coupling for straight pipes of FIG. It is side surface sectional drawing which shows the preparation state of the coupling for straight pipes of FIG. It is detail drawing of the projection part of the slide ring of the coupling for straight pipes of FIG. It is side surface sectional drawing of the joint for straight pipes which concerns on the 2nd Embodiment of this invention. It is side surface sectional drawing of the coupling for straight pipes which concerns on the 3rd Embodiment of this invention. It is side surface sectional drawing of the coupling for straight pipes which concerns on the 4th Embodiment of this invention. It is detail drawing of the slide ring of the coupling for straight pipes of FIG.

  The straight pipe joint 10 according to the first embodiment of the present invention is disposed inside the main body 12 and the main body 12 as shown in FIG. A slide ring 14 that receives an insertion force from the main body 12, a holder 18 that is arranged outside the main body 12 and is integrally connected to the slide ring 14 by a pin 16 as a connecting member, and a pipe holding that is held inside the holder 18 A packing 20 as a member is provided. The main body 12 has an uneven passive portion 22 formed on the inner peripheral surface thereof. A pressing portion 24 for crushing the packing 20 is formed at the end portion 13 (the right end portion in the drawing) of the main body 12 on the side where the straight pipe P is received. Further, a long hole 25 penetrating from the inside to the outside is formed in the outer peripheral surface of the main body 12, and the pin 16 penetrates the inside of the long hole 25. On the movable end (engagement end) 15 in the opposite direction (left side in the figure) to the side of the slide ring 14 that receives the straight pipe P, a convex protrusion 26 that engages with the passive portion 22 of the main body 12. Is formed. A groove 28 is formed on the outer periphery of the slide ring 14, and the pin 16 is inserted into the groove 28. A step-shaped groove 30 for holding the packing 20 is formed inside the holder 18, and a hole 32 into which the pin 16 is press-fitted and fixed is provided on the outer peripheral surface. A straight pipe holding surface 34 for holding the straight pipe P is formed inside the packing 20, and an end of the packing 20 opposite to the side receiving the straight pipe P (the end on the left side in the figure). ) Is formed with a passive surface 36 that receives a pressing force by the pressing portion 24 of the main body 12. Further, the protruding portion 26 of the slide ring 14 is movable in the axial direction within a range where the passive portion 22 of the main body 12 is formed. As will be described later, the straight pipe joint 10 has a connection state (FIG. 2) that is held by the holding force of the straight pipe holding surface 34 of the packing 20 when the straight pipe P is inserted inside the main body 12. When the straight pipe P is pulled out, the holding state of the straight pipe holding surface 34 of the packing 20 is reduced or released, so that the ready state can be reconnected (FIG. 3). ).

  When the straight pipe P is inserted inside the main body 12, the straight pipe P comes into contact with the contact end 14a of the slide ring 14, and the slide ring 14 is pushed. Since the holder 18 is connected to the slide ring 14 by the pin 16, the slide ring 14, the pin 16 and the holder 18 are displaced by the straight pipe P in the insertion direction of the straight pipe P. The packing 20 held by the holder 18 is compressed by the passive surface 36 being pressed by the pressing portion 24 of the main body 12, the diameter of the straight pipe holding surface 34 is reduced, and the straight pipe P is held. (FIG. 2). Since the contact end 14 a of the slide ring 14 is formed of a seal member such as rubber, the straight pipe P and the slide ring 14 are sealed by the contact end 14 a of the slide ring 14. When the straight pipe P is pulled out from the joint 10 for straight pipe, the holder 18 is displaced in the same direction as the pulling direction of the straight pipe P in a state of being integrated with the pin 16 and the slide ring 14 by the holding force of the packing 20. Thus, the compressive force of the packing 20 by the pressing portion 24 of the main body 12 is reduced or released. As a result, the holding force of the straight pipe holding surface 34 of the packing 20 whose diameter has been reduced is reduced, and the straight pipe P can be pulled out (FIG. 3).

  The passive portion 22 of the main body 12 and the protruding portion 26 of the slide ring 14 are always engaged regardless of the state, and the engagement position is displaced between the connected state and the ready state.

  As shown in FIG. 4, the movable end 15 of the slide ring 14 has a plurality of notches 42 so as to be movable radially outward and radially inward. The protrusion 26 is provided on the passive portion 22 of the main body 12 by the flexibility of the movable end 15 and the insertion force of the pushing operation of the straight pipe P due to being divided into two or more by the notch 42. And the straight pipe joint 10 changes from the ready state to the connected state. Further, due to the pulling force of the straight pipe P, the protruding portion 26 moves over the convex portion of the passive portion 22 of the main body 12 and moves in the direction of the pressing portion 24 of the main body 12, and the straight pipe joint 10 is connected. Change from state to ready state. By doing so, it is possible to exert a resistance force when displacing from the connected state to the ready state, and in order to pull out the straight pipe P from the joint 10 for a straight pipe, it is pulled out with a certain force or more. It has to come. Further, by changing the angle of the surface where the passive portion 22 and the protruding portion 26 are engaged, a certain force or more for pulling out the straight pipe P from the straight pipe joint 10 can be adjusted.

  The packing 20 can be another elastic member such as an O-ring or an X-ring.

  The pin 16 inserted in the groove 28 of the slide ring 14 is provided with a screw hole on the outer surface of the slide ring, and similarly provided with a screw at the end of the pin in the slide ring direction, thereby fastening the pin and the slide ring. It is also possible to fix.

  In this way, in the straight pipe joint 10, by using the packing 20 for holding the straight pipe P, the straight pipe P can be connected and disconnected without being deformed and damaged. Moreover, it becomes possible to repeat connection and disconnection by the holding structure of the straight pipe P using the elastic force when the packing 20 is compressed by the pressing portion 24 of the main body 12.

  The straight pipe joint 210 according to the second embodiment of the present invention is the first in that the shape of the pressing portion 224 of the main body 212 is increased in diameter toward the packing 20 as shown in FIG. It differs from the joint 10 for straight pipes which concerns on embodiment. Thereby, it becomes possible to make it easy to crush the edge part of the packing 20 more radially inside.

  The straight pipe joint 310 according to the third embodiment of the present invention relates to the first embodiment in that a groove 344 is provided in the straight pipe holding surface 334 of the packing 320 as shown in FIG. Different from the joint 10 for a straight pipe. The packing 320 is easily crushed by the pressing force of the pressing portion 324 of the main body 312, and the straight pipe P can be held more effectively.

  The straight pipe joint 410 according to the fourth embodiment of the present invention is for a straight pipe according to the first embodiment in that the groove of the passive portion 422 of the main body 412 has a screw structure as shown in FIG. Different from the joint 10. In the embodiment, the protrusion 426 of the slide ring 414 can be received by a screw structure.

  In the straight pipe joint 410, only the push-in operation and the pull-out operation are performed by arranging the positions of the protrusions 426 of the slide ring 414 so as to match the thread pitch of the passive portion 422 of the main body 412 as shown in FIG. Instead, the straight pipe P can be connected and disconnected by rotating operation.

Straight pipe joint 10; body 12; end 13; slide ring 14; contact end 14a; movable end 15; pin 16; holder 18; packing 20; passive part 22; 26; groove 28; groove 30; hole 32; straight pipe holding surface 34; passive surface 36; notch 42; straight pipe joint 210; body 212; pressing portion 224; straight pipe joint 310; Packing 320; pressing portion 324; straight pipe holding surface 334; groove 344; straight pipe joint 410; body 412; slide ring 414; passive portion 422; projection 426;

Claims (5)

A cylindrical main body having a cylindrical wall, a passive portion disposed on the cylindrical wall, a pressing portion disposed on an end opposite to the passive portion, and a long hole penetrating in the radial direction of the cylindrical wall When,
A contact end that is disposed inside the main body so as to be displaceable in the axial direction of the main body, receives a insertion force from the straight pipe and comes into contact with the straight pipe, and an engagement end opposite to the contact end. A slide ring provided with a protrusion that engages with the passive portion of the main body at the engagement end;
A connecting member disposed so as to penetrate the elongated hole of the main body and fixed to the outer peripheral portion of the slide ring in the axial direction;
A holder that is disposed outside the main body and engages with the connecting member to displace the main body together with the slide ring in the axial direction;
A pipe holding member made of an annular elastic member held inside the holder,
Due to the engagement between the passive portion and the protrusion, displacement of the slide ring with respect to the main body in the axial direction is suppressed,
When the straight pipe is inserted into the main body, the straight pipe pushes the contact end of the slide ring, and the slide ring is integrated with the connecting member and the holder in the insertion direction of the straight pipe. Holding force generated when the pipe holding member is compressed by the pressing portion of the main body and the inner peripheral surface of the pipe holding member is reduced in diameter and pressed against the outer peripheral surface of the straight pipe. The straight pipe is held by the connected state,
When the straight pipe held by the pipe holding member is pulled out from the main body, the holder is integrated with the connecting member and the slide ring by the holding force of the pipe holding member. The pipe pipe is displaced in the same direction as the drawing direction of the pipe, and the compression force of the pipe holding member by the pressing portion is reduced or released, the holding force is reduced, and the holding state of the straight pipe is released. A fitting that was made to be.   A plurality of notches are formed at the engagement end of the slide ring so that the protrusion can be displaced in a radial direction intersecting the axial direction of the slide ring, and the notch is divided into two or more at the notch. The protrusion moves over the groove provided in the passive portion of the main body and moves in the direction opposite to the pressing portion of the main body due to the elastic force of the engagement end and the insertion force of the straight pipe pushing operation. The projection is moved from the preparation state to the connection state, and the projection moves over the passive portion of the main body in the direction of the pressing portion of the main body due to the pulling-out force of the straight pipe. The joint according to claim 1, wherein the joint is changed from the connected state to the ready state.   The joint according to claim 1 or 2, wherein a groove of the passive portion of the main body has a screw structure, and the protrusion of the slide ring is received by the screw structure. By arranging the positions of the protrusions of the slide ring so as to match the pitch of the screws of the passive part, the straight pipe is connected and disconnected not only by pushing and pulling but also by rotating. The joint according to claim 3. The shape of the said press part of the said main body was made into the shape which diameter-expands toward the said pipe holding member, and the end part of the said pipe holding member was made easy to be crushed by radial direction inner side. Fittings.

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