JP6545458B2 - Piping joint - Google Patents

Description

  The present invention relates to a pipe joint.

  Patent Document 1 discloses a pipe joint in which a lock ring (tube retaining means) is disposed in a tubular pipe connection portion formed in a joint body. In this pipe joint, the teeth of the lock ring bite into the pipe (tube) inserted into the pipe connection, and the pipe is held in the pipe connection.

Patent No. 4161333

  By the way, in the structure of the pipe joint disclosed in Patent Document 1, it is necessary to change the size of the pipe connection portion in accordance with the pipe diameter of the pipe connected to the joint body. For this reason, in the case where the pipe joint has a structure capable of connecting pipes of different branch diameters in multiple branches, it is necessary to manufacture a joint main body respectively provided with pipe connection parts of different sizes, and variations of the joint main body increase Tend.

  An object of the present invention is to provide a pipe joint capable of connecting pipes having different pipe diameters to a joint body provided with a plurality of pipe connection parts of the same shape in consideration of the above fact.

The pipe joint according to claim 1 of the present invention has a joint main body provided with a plurality of pipe connection parts of the same shape, and an outer shape which is inserted and held in the cylindrical pipe connection part, and the first pipe is inserted. And a tubular first connection module for holding the inserted first pipe, and an outer shape inserted and held in the pipe connection portion and having a smaller pipe diameter than the first pipe. And (2) a tubular second connection module which is an inner shape into which the pipe is inserted and which holds the inserted second pipe, and the first connection module and the second connection module are respectively the pipe The first connection module and the second connection module are each engaged with a blocking member which is detachably mounted to the connection portion and is detachably mounted to the pipe connection portion to prevent the detachment operation. , Project radially outward A force, said blocking member engageable with the engaging recess provided on the protrusions are formed, the the pipe connecting portion, said protrusion and a guide groove capable of the pipe insertion direction, in communication with the grooves circumferentially extend can guide the projection in the circumferential direction, and the a first connection module or the second connection module is opening exposing the engagement recess in a state of being mounted is formed, the first In the connection module and the second connection module, the engagement exposed from the opening in a state where the protrusion is guided to the opening in the circumferential direction of the piping connection and attached to the piping connection. The disengagement operation is blocked by the engagement of the blocking member with the recess.

In the pipe joint according to claim 1, the first pipe can be connected to the pipe connection portion of the joint body via the first connection module. In addition, the second pipe can be connected to the pipe connection portion of the joint body via the second connection module. That is, by using the first connection module and the second connection module, it is possible to respectively connect the first pipe and the second pipe with different pipe diameters to a plurality of pipe connection parts of the same shape provided in the joint body. For this reason, it is not necessary to manufacture the joint main body provided with the pipe connection part of a different shape (size) according to the pipe diameter of piping, and the increase in the variation of a joint main body can be suppressed.
Moreover, in the pipe joint according to claim 1, since the first connection module and the second connection module are detachable with respect to the pipe connection portion, the first pipe and the second pipe for the same pipe connection portion are provided. It becomes easy to change the In addition, replacement of the first connection module and the second connection module becomes easy during maintenance.
Furthermore, in the pipe joint according to claim 1, in the mounting state of the blocking member (in the state where the blocking member is mounted on the pipe connection portion), the disengagement operation of the first connection module and the second connection module by the engagement with the blocking member. Is blocked. That is, since the separating operation of the first connection module and the second connecting module is blocked by the blocking member unless the blocking member is separated from the pipe connecting portion, the first pipe and the second pipe are disconnected from the pipe connecting portion by an erroneous operation. Can be prevented. In addition, the separation operation of the first connection module and the second connection module can be performed by separating the blocking member from the pipe connection part.

  The pipe joint according to claim 2 of the present invention is the pipe joint according to claim 1, wherein a plurality of the second connection modules are provided at intervals in the circumferential direction, and project outward in the radial direction from the outer peripheral surface, A top portion is provided with a projecting portion that abuts on the inner circumferential surface of the pipe connection portion.

  In the pipe joint according to claim 2, when the second connection module is inserted into the pipe connection portion, the tops of the plurality of projecting portions provided on the second connection module abut on the inner circumferential surface of the pipe connection portion. In this state, the second connection module is held in the pipe connection. Thus, in the second connection module, since a plurality of protrusions projecting radially outward from the outer peripheral surface are provided, for example, the thickness of the second connection module is increased and the entire outer peripheral surface is formed on the inner surface of the pipe connection portion. Weight reduction can be achieved as compared with the configuration in which the members are in contact.

  A piping joint according to a third aspect of the present invention is the piping joint according to the second aspect, wherein the projecting portion extends from one end side to the other end side in the axial direction of the second connection module.

  In the pipe joint according to claim 3, since the projecting portion extends from one end side to the other end side in the axial direction of the second connection module, the second connection module swings in the axial direction in the pipe connection portion. Is suppressed. In addition, radial movement of the second connection module in the pipe connection portion is suppressed by the projecting portion. Thereby, rattling of the second connection module in the pipe connection portion is suppressed.

  The pipe joint according to a fourth aspect of the present invention is the pipe joint according to the third aspect, wherein the projecting portion is an axial projecting portion extending along an axial direction of the second connection module, and the axial projecting portion And a circumferential protrusion extending along the circumferential direction of the second connection module.

  In the pipe joint according to claim 4, the axial protrusion suppresses the second connection module from swinging in the axial direction in the pipe connection, and the axial protrusion and the circumferential protrusion form the pipe connection. The second connection module is suppressed from moving in the radial direction. Thereby, rattling of the second connection module in the pipe connection portion is further suppressed.

  As described above, according to the present invention, it is possible to provide a pipe joint capable of connecting pipes having different pipe diameters to a joint body including a plurality of pipe connection parts of the same shape.

It is a perspective view of the piping joint of 1st Embodiment of this invention, and has shown the state which mounted | worn the 1st connection module in the piping connection part of the center. It is the disassembled perspective view which decomposed | disassembled various coupling components including the 1st connection module with which the piping connection part of the center of the coupling main body shown by FIG. 1 is mounted | worn. It is a disassembled perspective view of the 1st connection module shown by FIG. It is sectional drawing (4 X-4 X sectional view of FIG. 1) which cut | disconnected the central piping connection part in which the 1st connection module was mounted | worn along the axial direction. FIG. 5 is a cross-sectional view taken along line 5X-5X in FIG. 4 and shows a state in which a first pipe is inserted. It is the disassembled perspective view which decomposed | disassembled various coupling components including the 2nd connection module with which the piping connection part of the center of the coupling body shown by FIG. 1 is mounted | worn. It is a disassembled perspective view of the 2nd connection module shown by FIG. It is sectional drawing (sectional drawing corresponding to 4 X-4 X sectional drawing of FIG. 1) which cut | disconnected the central piping connection part in which the 2nd connection module was mounted | worn along the axial direction. FIG. 10 is a cross-sectional view taken along line 9X-9 in FIG. 8, showing a state in which a second pipe is inserted. The piping joint of FIG. 1 WHEREIN: It is a perspective view which shows the state which removed the blocking member and the cap from the piping connection part of the center in which 1st piping was inserted. FIG. 11 is a perspective view showing a state in which the projection of the first connection module has been moved to the release position in the piping joint of FIG. 10. The piping joint of FIG. 1 WHEREIN: It is a perspective view which shows the state which removed the 1st piping from a piping connection part with a 1st connection module, and also removed the O-ring. FIG. 13 is a cross-sectional view taken along line 13X-13X in FIG. It is a sectional view corresponding to Drawing 13, and shows the state where the 1st piping was cut and the 1st piping was removed from the 1st connection module. It is sectional drawing (sectional drawing corresponding to 4 X-4 X sectional drawing of FIG. 1) which cut | disconnected the central piping connection part with which the modification of the 1st connection module of 1st Embodiment was mounted | worn along the axial direction. It is sectional drawing which cut | disconnected the modification of the cap of 1st Embodiment along the axial direction of a piping connection part, and has shown the state which inserted the 1st piping in the cap of a modification. The state which inserted the 2nd piping in the cap shown in FIG. 16 is shown. It is sectional drawing which cut | disconnected the center piping connection part with which the modification of the 2nd connection module of 1st Embodiment was mounted | worn in the direction orthogonal to an axial direction, and has shown the state in which the 2nd piping was inserted.

  Hereinafter, one embodiment of a piping joint concerning the present invention is described, referring to drawings.

First Embodiment
The piping joint 30 of 1st Embodiment is shown by FIG. The pipe joint 30 according to the present embodiment is a joint that is used in an air brake system and connects pipes for transferring air from the compressor to each air brake unit. The present invention is not limited to this configuration. The pipe joint 30 may be used in any device as long as it is used to connect pipes.

  Further, although the pipes (P1 and P2 as an example) connected by the pipe joint 30 may be resin pipes or metal pipes, in the present embodiment, resin pipes (for example, nylon tubes) are connected.

  As shown in FIG. 2, the pipe joint 30 has an outer shape that is inserted and held in the pipe connection portion 40 and a joint body 32 provided with a plurality of pipe connection portions 40 having the same shape, and the pipe P1 is inserted A tubular connection module 50 for holding the pipe P1 which is shaped and inserted, and an inner shape into which the pipe P2 having a pipe diameter smaller than that of the pipe P1 is inserted. And a tubular connection module 100 for holding the inserted pipe P2. In addition, piping P1 of this embodiment is an example of 1st piping of this invention, and piping P2 of this embodiment is an example of 2nd piping of this invention. The connection module 50 of the present embodiment is an example of the first connection module of the present invention, and the connection module 100 of the present embodiment is an example of the second connection module of the present invention.

  Further, the “pipe insertion direction” in the present embodiment indicates the arrow IN direction in the drawing, and “the pipe is opposite to the pipe insertion direction” indicates the arrow OUT direction in the drawing. The side opposite to the pipe insertion direction may be rephrased as the pipe drawing direction.

  As shown in FIG. 1 and FIG. 2, the joint main body 32 of the present embodiment includes three pipe connection parts 40 and a T-shaped communication part 34 that connects these pipe connection parts 40. . The interiors of these pipe connection portions 40 communicate with each other through the interior of the communication portion 34. Moreover, the joint main body 32 of this embodiment is an integrally molded product of resin.

  The size (size of the inner diameter and the outer diameter) of the pipe connection portion 40 of the present embodiment is based on the size (outer diameter) of the connection module 50 used for connecting the pipe P1. For this reason, below, the composition in the case of connecting piping P1 to piping connection part 40 of the center of fitting main part 32 using connection module 50 is explained first.

  As shown in FIG. 2, the pipe connection portion 40 is formed in a substantially cylindrical shape. A groove-shaped housing portion 44 which extends along the circumferential direction of the pipe connection portion 40 and stores the blocking member 70 is formed on the outer peripheral surface 40A of the pipe connection portion 40. An opening 46 for exposing a part of the connection module 50 in the mounted state is formed on the bottom 44A of the housing 44 on the opposite side of the center axis C (see FIG. 5) of the pipe connection 40. . In the present embodiment, the openings 46 are respectively formed at both ends in the extending direction of the housing portion 44 (the same direction as the circumferential direction of the pipe connection portion 40). In these openings 46, a pair of projections 54, which will be described later, of the connection module 50 inserted into the pipe connection portion 40 are disposed. Further, as shown in FIGS. 10 and 11, the opening 46 is formed in a size (width) in which the projection 54 can move in the circumferential direction of the pipe connection portion 40. When the blocking member 70 is housed in the housing portion 44 (the blocking member 70 is attached to the pipe connection portion 40), the opening 46 is covered by the blocking member 70, respectively.

  As shown in FIG. 4, in the inner circumferential surface 40B of the pipe connection portion 40, the stepped portions 40D and 40E are smaller in diameter toward the pipe insertion direction than the opening 46 in the pipe insertion direction. It is formed. The stepped portion 40E is formed closer to the pipe insertion direction than the stepped portion 40D.

  Further, in the inner peripheral surface 40B of the pipe connection portion 40, groove portions 48 extending in the pipe insertion direction from the tip of the insertion port 40C to the respective openings 46 are respectively formed. The groove width of the groove portion 48 is set to a width (size) that allows the protrusion 54 to move in the pipe insertion direction along the groove portion 48 in a state where the protrusion 54 of the connection module 50 is inserted.

  As shown in FIGS. 3 and 4, the connection module 50 is provided in the tubular member 52 into which the pipe P1 is inserted, and the outer periphery of the pipe P1 disposed in the tubular member 52 and inserted into the tubular member 52. A lock ring 60 for holding the pipe P1 by pressing the surface S1 and a lid member 64 for preventing the lock ring 60 disposed in the tubular member 52 from falling off are provided.

  The cylindrical member 52 is formed of a resin material in a cylindrical shape. The tubular member 52 is inserted into the pipe connection portion 40 when the connection module 50 is mounted, and the outer peripheral surface 52A is in contact with the inner peripheral surface 40B of the pipe connection portion 40. The outer circumferential surface 52A is at least partially in contact with the inner circumferential surface 40B. Further, in the mounted state of the connection module 50, as shown in FIG. 5, the central axis C of the pipe connection portion 40 and the central axis of the cylindrical member 52 substantially coincide with each other.

  Further, on the inner peripheral surface 52B of the cylindrical member 52, an inclined portion 52C is formed so as to decrease in inner diameter toward the side opposite to the pipe insertion direction. An inclined portion 60C of a lock ring 60 described later abuts on the inclined portion 52C.

On the outer peripheral surface 52 </ b> A of the cylindrical member 52, protrusions 54 protruding outward in the radial direction are respectively formed on opposite sides of the central axis of the cylindrical member 52. These protrusions 54 have a size (width) that allows them to move in the pipe insertion direction while being guided by the groove 48 in the groove 48 of the pipe connection 40 when the connection module 50 is attached to the pipe connection 40. .
Further, these protrusions 54 are disposed in the respective openings 46 in a state where the connection module 50 is attached to the pipe connection portion 40.

  As shown in FIGS. 2 and 10, the top 54A of the projection 54 is formed with an engagement recess 56 which engages with an engagement projection 74 described later of the blocking member 70.

  As shown in FIG. 3 and FIG. 4, the lock ring 60 is a metal material formed in a substantially cylindrical shape, and the large diameter portion 60A including the end on the pipe insertion direction side and the end on the opposite side And the inclined portion 60C formed between the large diameter portion 60A and the small diameter portion 60B. In the lock ring 60, a slit extending from the middle of the small diameter portion 60B toward the large diameter portion 60A, extending in the circumferential direction at the large diameter portion 60A, and extending halfway from the large diameter portion 60A to the middle of the small diameter portion 60B A plurality of 60D are formed at intervals in the circumferential direction. The portion surrounded by the slits 60D is bent inward in the radial direction of the lock ring 60. The bent portion is a claw portion 62 that presses the outer peripheral surface S1 of the pipe P1 inserted into the lock ring 60.

  The lock ring 60 has an inner diameter equal to or less than the outer diameter of the pipe P1 in the free state (no load state). Here, “the inner diameter of the lock ring 60” refers to the diameter of a circle inscribed in the tip of the claw portion 62. Thus, when the pipe P1 is inserted into the lock ring 60, the tip of the claw portion 62 presses the outer peripheral surface S1 of the pipe P1, and the lock ring 60 holds the pipe P1.

  The inclined portion 60C of the lock ring 60 is inclined so as to decrease in diameter in the direction opposite to the pipe insertion direction. When the lock ring 60 moves in the direction opposite to the pipe insertion direction, the inclined portion 60C abuts on the inclined portion 52C of the cylindrical member 52 and elastically deforms so that the inclined portion 52C is inclined. At this time, since the claws 62 are protruded radially inward of the lock ring 60, the inner diameter of the lock ring 60 is reduced. With this configuration, when the pipe P1 moves in the extraction direction, the pressing force for pressing the outer circumferential surface S1 of the pipe P1 by the claws 62 of the lock ring 60 is increased.

  In the present embodiment, the lock ring 60 is made of metal, but the present invention is not limited to this configuration, and may be made of resin as long as it is elastically deformable.

  As shown in FIG. 3, the lid member 64 is a resin material formed in a substantially annular shape. Specifically, the lid member 64 is configured to include a lid main body 64A formed in an annular shape, and a flange portion 64B formed on the pipe insertion direction side of the lid main body 64A and protruding outward in the radial direction. The lid main body 64A is press-fit into the tubular member 52 from the end 52D of the tubular member 52 in the pipe insertion direction. The lid member 64 can be removed from the cylindrical member 52, for example, by reducing the diameter of the joint portion with the cylindrical member 52 with a dedicated tool or the like.

  As shown in FIGS. 2 and 4, an annular O-ring 90 is inserted and arranged on the pipe insertion direction side of the connection module 50 in the pipe connection portion 40. Specifically, the O-ring 90 is disposed between the lid member 64 and the receiving portion 66B of the support member 66, and the pipe P1 is inserted inside. The O-ring 90 has a size such that the outer peripheral portion contacts the inner peripheral surface 40B of the pipe connection portion 40 and the inner peripheral portion contacts the outer peripheral surface S1 of the pipe P1. The O-ring 90 seals between the pipe connection portion 40 and the pipe P1.

  As shown in FIGS. 4 and 5, a substantially cylindrical support member 66 for supporting the inserted pipe P <b> 1 from the inside is disposed in the pipe connection portion 40. The support member 66 includes a cylindrical portion 66A having a diameter smaller than that of the pipe P1, and a cylindrical receiving portion 66B provided so as to surround the cylindrical portion 66A at an axial intermediate portion of the cylindrical portion 66A. It consists of An end of the cylindrical portion 66A on the pipe insertion direction side is fitted and fixed to the pipe insertion direction side with respect to the step portion 40E of the pipe connection portion 40. By supporting the pipe P1 from the inside with the cylindrical portion 66A, deformation (crush deformation) of the pipe P1 due to the pressing force of the claw portion 62 of the lock ring 60 is suppressed. The receiving portion 66B is coaxial with the cylindrical portion 66A, and a gap is formed between the receiving portion 66B and the cylindrical portion 66A. The pipe P1 is inserted into this gap. Further, an end portion on the pipe insertion direction side of the receiving portion 66B is bent inward in the radial direction and connected to the cylindrical portion 66A, and an end portion on the opposite side to the pipe insertion direction is bent outward in the radial direction. It is supposed to receive

  As shown in FIGS. 2 and 4, a rubber cap 80 is fitted in the insertion port 40 </ b> C of the pipe connection portion 40. A through hole 80A is formed at the center of the cap 80, and the pipe P1 passes through the through hole 80A. The inner diameter of the through hole 80A is preferably set to be the same as or slightly smaller than that of the pipe P1 from the viewpoint of contamination, for example. Further, the connection module 50 is held in the pipe connection portion 40 by the cap 80 (see FIG. 4).

  As shown in FIG. 2, the blocking member 70 is fitted in the housing portion 44 in a direction (in the present embodiment, a direction orthogonal to the pipe insertion direction) in the pipe insertion direction and attached to the pipe connection portion 40. Is configured as.

  The blocking member 70 is formed in an annular shape of which a part in the circumferential direction is cut, and protrudes radially inward from the plate-like main body portion 72 covering the accommodation portion 44 and both end portions 72A in the circumferential direction of the main body portion 72 And an engagement protrusion 74. The engagement convex portion 74 is formed to engage with the engagement concave portion 56 of the projection 54 of the connection module 50 in a state where the blocking member 70 is attached to the pipe connection portion 40. Further, the length in the circumferential direction of the main body portion 72 is set such that the both end portions 72A come into contact with the circumferential end portion 44B of the accommodation portion 44 in a state where the blocking member 70 is attached to the pipe connection portion 40 There is. Thus, in the state where the blocking member 70 is attached to the pipe connection portion 40, movement of the blocking member 70 in the circumferential direction of the pipe connection portion 40 is limited.

  Further, on the both end portions 72A side of the main body portion 72 in the circumferential direction, protrusions 76 are respectively formed. The protrusion 76 is configured to be fitted into the gap between the protrusion 54 of the connection module 50 and the opening 46 in the mounted state of the connection module 50. The protrusion 76 fits into the gap between the protrusion 54 and the opening 46, and the engagement protrusion 74 engages with the engagement recess 56 to restrict the rotation of the connection module 50. That is, the detachment operation of the connection module 50 is blocked.

  Here, the “mounted state of the connection module 50” refers to bringing the protrusion 54 of the connection module 50 into contact with the circumferential end of the opening 46 opposite to the groove 48 as shown in FIG. Point.

  As shown in FIG. 1, the outer peripheral surface of the main body portion 72 is the outer peripheral surface of the pipe connection portion 40 in a state where the blocking member 70 is housed in the housing portion 44 (a state where the blocking member 70 is mounted on the pipe connection portion 40). It has a shape (curved shape in the present embodiment) along 40A.

  Next, the structure in the case of connecting the piping P2 to the piping connection part 40 of the center of the coupling main body 32 using the connection module 100 is demonstrated.

  As shown in FIGS. 6 and 7, the connection module 100 includes the cylindrical member 102 in which the pipe P2 is inserted, and the outer periphery of the pipe P2 disposed in the cylindrical member 102 and inserted in the cylindrical member 102. A lock ring 110 for holding the pipe P2 by pressing the surface S2 and a lid member 114 for preventing the lock ring 110 disposed in the tubular member 52 from falling off are provided.

  The cylindrical member 102 is formed of a resin material in a cylindrical shape. The cylindrical member 102 is inserted into the pipe connection portion 40 in a mounted state of the connection module 100, and a protrusion 108 described later provided on the outer peripheral surface 102A abuts on the inner peripheral surface 40B of the pipe connection portion 40. (See FIG. 9). Further, in the mounted state of the connection module 100, as shown in FIG. 9, the central axis C of the pipe connection portion 40 and the central axis of the cylindrical member 102 substantially coincide with each other.

  The inner circumferential surface 102B of the cylindrical member 102 is formed with an inclined portion 102C which is inclined so that the inner diameter decreases toward the side opposite to the pipe insertion direction. An inclined portion 110C of a lock ring 110 described later abuts on the inclined portion 102C.

  On the outer peripheral surface 102 </ b> A of the cylindrical member 102, protrusions 104 that protrude outward in the radial direction are respectively formed on opposite sides of the central axis of the cylindrical member 102. These projections 104 are formed (width) such that they can move in the pipe insertion direction while being guided by the groove 48 in the groove 48 of the pipe connection 40 when the connection module 100 is attached to the pipe connection 40. The protrusions 104 are disposed in the openings 46 when the connection module 100 is attached to the pipe connection portion 40.

  Further, in the top portion 104A of the projection 104, like the projection 54 of the connection module 50, an engagement recess 106 (see FIG. 9) that engages with the engagement projection 74 of the blocking member 70 is formed.

  Further, as shown in FIGS. 7 and 9, on the outer peripheral surface 102A of the cylindrical member 102, protruding portions 108 protruding radially outward from the outer peripheral surface 102A are spaced apart in the circumferential direction of the cylindrical member 102. Plural (two in the present embodiment) are provided. In the present embodiment, the protrusions 108 are respectively provided on the opposite side of the central axis C of the cylindrical member 102. The projecting portion 108 extends from one end side (opposite side in the pipe inserting direction) of the cylindrical member 102 in the axial direction to the other end side (pipe inserting direction). Specifically, the protrusion 108 includes an axial protrusion 108A extending along the axial direction of the connection module 100, and a circumferential protrusion 108B extending along the circumferential direction of the connection module 100 from the axial protrusion 108A. Is composed including. In the present embodiment, three circumferential protrusions 108B are formed at intervals in the axial direction of the tubular member 102, and in the circumferential direction of the tubular member 102 around the axial protrusion 108A. It extends. Further, as described above, in the attached state of the connection module 100, the top 108S of the protrusion 108 (the top of the axial protrusion 108A and the top of the circumferential protrusion 108B) is in contact with the inner circumferential surface 40B of the pipe connection 40. I am in touch.

  As shown in FIG. 7, the lock ring 110 is a lock ring smaller in size than the lock ring 60 used for the connection module 50 and has the same configuration as the lock ring 60 except for the size. That is, the large diameter portion 110A, the small diameter portion 110B, the inclined portion 110C, the slit 110D and the claw portion 112 of the lock ring 110 are the large diameter portion 60A, the small diameter portion 60B, the inclined portion 60C, the slit 60D and the claw portion 62 of the lock ring 60. Respectively.

  The lock ring 110 has an inner diameter equal to or less than the outer diameter of the pipe P2 in the free state (no load state). Here, “the inner diameter of the lock ring 110” refers to the diameter of a circle inscribed in the tip of the claw portion 112. Thus, when the pipe P2 is inserted into the lock ring 110, the tip end of the claw portion 112 presses the outer peripheral surface S2 of the pipe P2, and the lock ring 110 holds the pipe P2.

  When the lock ring 110 moves in the direction opposite to the pipe insertion direction, the inclined portion 110C abuts on the inclined portion 102C of the cylindrical member 102 and elastically deforms so that the inclined portion 102C is inclined. At this time, since the claws 112 are protruded radially inward of the lock ring 110, the inner diameter of the lock ring 110 is reduced. With this configuration, when the pipe P2 moves in the removal direction, the pressing force for pressing the outer peripheral surface S2 of the pipe P2 by the claws 112 of the lock ring 110 is increased.

  As shown in FIGS. 7 and 8, the lid member 114 is a lid member smaller in size than the lid member 64 used for the connection module 50 and has the same configuration as the lid member 64 except for the size. That is, the lid main body 114A and the flange portion 114B of the lid member 114 correspond to the lid main body 64A and the flange portion 64B of the lid member 64, respectively. The lid main body 114A is press-fit into the tubular member 102 from the end 102D of the tubular member 102 in the pipe insertion direction. Further, as shown in FIG. 8, the lid member 114 can be removed from the lid member 114 by, for example, reducing the diameter of the joint portion with the cylindrical member 102 with a dedicated tool or the like.

  As shown in FIGS. 6 and 8, an annular O-ring 92 is disposed closer to the pipe insertion direction than the connection module 50 in the pipe connection portion 40. Specifically, the O-ring 92 is disposed between the lid member 114 and the receiving portion 116B of the support member 116, and the pipe P2 is inserted inside. The O-ring 92 is an O-ring smaller in size than the O-ring 90 used for the connection module 50, the outer peripheral portion is in contact with the inner peripheral surface 40B of the pipe connection portion 40, and the inner peripheral portion is the outer peripheral surface S2 of the pipe P2. The size is in contact with the The O-ring 92 seals between the pipe connection portion 40 and the pipe P2.

  As shown in FIGS. 8 and 9, a substantially cylindrical support member 116 for supporting the inserted pipe P2 from the inside is disposed in the pipe connection portion 40. As shown in FIG. The support member 116 is a support member smaller in size than the support member 66 used for the connection module 50 and has the same configuration as the support member 66 except for the size. That is, the cylindrical portion 116A and the receiving portion 116B of the support member 116 correspond to the cylindrical portion 66A and the receiving portion 66B of the support member 66, respectively. The cylindrical portion 116A of the support member 116 suppresses deformation of the pipe P2 due to the pressing force of the claw portion 112 of the lock ring 110. Further, an O-ring 92 described later is received at a portion of the receiving portion 116B bent outward in the radial direction.

  As shown in FIGS. 6 and 8, a rubber cap 82 is fitted in the insertion port 40 </ b> C of the pipe connection portion 40. A through hole 82A is formed at the center of the cap 82, and the pipe P2 passes through the through hole 82A. The inner diameter of the through hole 82A is preferably set to be the same as or slightly smaller than that of the pipe P2, for example, from the viewpoint of contamination. Further, the connection module 100 is held in the pipe connection portion 40 by the cap 82.

  In the pipe joint 30 of the present embodiment, when the pipe P1 is connected to the pipe connection portion 40, the pipe P2 is connected to the pipe connection portion 40 using the connection module 50, the support member 66, the cap 80 and the O ring 90. In the case of connection, the connection module 100, the support member 116, the cap 82 and the O-ring 92 are used. Moreover, as the piping coupling 30 of this embodiment is shown by FIG.2 and FIG.6, the connection modules 50 and 100 are mounted | worn with the piping connection part 40 of both ends, respectively. Therefore, the pipes P1 and P2 can be connected to the pipe connection portions 40 at both ends. That is, the pipe joint 30 of the present embodiment can connect the pipes P1 and P2 having different pipe diameters, respectively.

Next, the operation and effect of the pipe joint 30 of the present embodiment will be described.
In the pipe joint 30, when the pipe P1 is inserted into the pipe connection portion 40 on which the connection module 50 is mounted, the inserted pipe P1 is held by the connection module 50. Specifically, the claw portion 62 of the lock ring 60 constituting the connection module 50 presses the outer peripheral surface S1 of the inserted pipe P1 to hold the pipe P1. Thus, the pipe connection portion 40 and the pipe P1 are connected via the connection module 50.
In addition, when the pipe P2 is inserted into the pipe connection portion 40 to which the connection module 100 is attached, the inserted pipe P2 is held by the connection module 100. Specifically, the claw portion 112 of the lock ring 110 constituting the connection module 100 presses the outer peripheral surface S2 of the inserted pipe P2 to hold the pipe P2. Thus, the pipe connection portion 40 and the pipe P2 are connected via the connection module 100.
That is, by using the connection module 50 and the connection module 100, the pipes P1 and P2 having different pipe diameters can be connected to the plurality of pipe connection parts 40 of the same shape provided in the joint body 32, respectively. For this reason, it is not necessary to manufacture the joint main body provided with the pipe connection part of a different shape (size) according to the pipe diameter of piping, and the increase in the variation of a joint main body can be suppressed. In other words, since the joint body 32 can be made common to pipes having different pipe diameters, an increase in the cost of manufacturing a die for manufacturing various joint bodies can be suppressed.

  Further, when the connection module 100 is inserted into the pipe connection portion 40, the tops 108S of the plurality of projecting portions 108 provided in the connection module 100 respectively abut the inner circumferential surface 40B of the pipe connection portion 40, and in that state The connection module 100 is held in the pipe connection 40. As described above, in the connection module 100, since a plurality of the protrusions 108 are provided, for example, the thickness of the cylindrical member 102 of the second connection module is increased to contact the entire outer peripheral surface with the inner surface of the pipe connection portion. The weight can be reduced as compared to In addition, it is possible to suppress the occurrence of sink marks in the cylindrical member 102.

  Further, in the pipe joint 30, since the projection 108 is extended from one end side to the other side in the axial direction of the connection module 100, the connection module 100 swings in the axial direction in the pipe connection portion 40. Is suppressed. Further, radial movement of the connection module 100 in the pipe connection portion 40 is also suppressed. That is, rattling of the connection module 100 in the pipe connection portion 40 is suppressed by the projecting portion 108. In particular, in the present embodiment, the axial projecting portion 108A constituting the projecting portion 108 suppresses the pivotal movement of the connection module 100 in the axial direction in the pipe connection portion 40, and the circumferential direction constituting the projecting portion 108 The protrusion 108B and the axial protrusion 108A suppress the movement of the connection module 100 in the radial direction in the pipe connection portion 40. For this reason, rattling of the connection module 100 in the pipe connection portion 40 is further suppressed.

  Further, in the pipe joint 30, since the connection module 50 and the connection module 100 can be attached to and detached from the pipe connection portion 40, the connection of the pipe P1 and the pipe P2 to the same pipe connection portion 40 can be easily changed. . In addition, the connection module 50 and the connection module 100 can be easily replaced at the time of maintenance.

  Further, in a state in which the blocking member 70 is attached to the pipe connection portion 40 to which the connection module 50 is attached, the engagement convex portion 74 of the blocking member 70 engages with the engagement recess 56 of the connection module 50. Operation is blocked. Therefore, unless the blocking member 70 is detached from the pipe connection portion 40, the detachment operation of the connection module 50 is blocked by the blocking member 70. Therefore, it is possible to prevent the pipe P1 from being detached due to an erroneous operation. On the other hand, as shown in FIG. 10, by disengaging the blocking member 70 from the pipe connection portion 40, the projection 54 of the connection module 50 is released from the locked position (mounted position) shown in FIG. It becomes possible to move to the possible position). That is, the disconnection operation of the connection module 50 is possible. Here, the connection module 50 can be easily detached from the pipe connection part 40 by separating the connection module 50 from the pipe connection part 40 (see FIG. 12). Thereby, exchange of connection module 50 which is one of the parts (component parts) which constitute piping joint 30 becomes easy. As shown in FIG. 13, in the connection module 50 separated from the pipe connection portion 40 together with the pipe P1, as shown in FIG. 14, the pipe P1 is cut and the cut pipe CP1 is cut into the connection module 50. The pipe CP1 can be extracted while pushing and spreading the diameter of the lock ring 60 by pushing in the pipe insertion direction. Here, when no malfunction occurs in the lock ring 60, the connection module 50 can be attached again to the pipe connection portion 40 and used for connection between the pipe P1 and the pipe joint 30.

  Similarly, in a state where the blocking member 70 is attached to the pipe connection portion 40 to which the connection module 100 is attached, the engagement convex portion 74 of the blocking member 70 engages with the engagement recess 106 of the connection module 100 to connect the connection module The 100 release operations are blocked. Therefore, unless the blocking member 70 is detached from the pipe connection portion 40, the detachment operation of the connection module 100 is blocked by the blocking member 70, so that it is possible to prevent detachment of the pipe P2 due to an erroneous operation. Note that the disconnection operation of the connection module 100 and the procedure for extracting the piping separated from the piping P2 from the connection module 100 are for removing the connection module 50 and extracting the piping CP1 separated from the piping P1 from the connection module 50. The procedure is the same as in

  In the first embodiment, the pipe P1 and the pipe P2 having a smaller pipe diameter than the pipe P1 are connected to the joint main body 32 using the connection modules 50 and 100, but the present invention is not limited to this structure. For example, a pipe whose pipe diameter is smaller than that of the pipe P2 may be connected to the joint main body 32 using a connection module capable of holding the pipe.

  Moreover, although the connection module 50 is comprised by the cylindrical member 52, the lock ring 60, and the cover member 64 in 1st Embodiment, this invention is not limited to this structure. For example, as shown in FIG. 15, the connection module 50 may be configured by the cylindrical member 52 and the lock ring 60. When the lid member 64 is thus excluded, the end 52D of the cylindrical member 52 suppresses the removal of the O-ring 90 as shown in FIG. The connection module 100 may be configured by the cylindrical member 102 and the lock ring 110 as described above.

  Furthermore, in the first embodiment, the through holes 80A and 82A having different sizes are formed in the cap 80 into which the pipe P1 is inserted and the cap 82 into which the pipe P2 is inserted. It is not limited to the configuration. For example, as in the case of the cap 120 shown in FIG. 16, the diameter of the through hole 120A for passing the pipe may be adjusted. The cap 120 is a bellows portion 120B in which a portion around the through hole 120A is thinner than the other portions and has a wave shape (amplitude shape). The through hole 120A of the cap 120 is formed in accordance with the diameter of the pipe P2, and as shown in FIG. 16, when the pipe P1 is inserted, the through hole 120A is expanded and the amplitude of the bellows portion 120B is large ( Become high). On the other hand, as shown in FIG. 17, when the pipe P2 is inserted, the amplitude of the bellows portion 120B is smaller (lower) than that when the pipe P1 is inserted. By using such a cap 120 for the pipe joint 30, the parts (joint parts) constituting the pipe joint 30 can be further shared.

  In 1st Embodiment, although the protrusion part 108 is provided in two places in the outer peripheral surface 102A of the cylindrical member 102 of the connection module 100, this invention is not limited to this structure. For example, as shown in FIG. 18, another protrusion 122 may be provided on the outer peripheral surface 102 </ b> A of the cylindrical member 102 at a position different from the protrusion 108. By providing the plurality of protrusions 108 and 122 on the outer peripheral surface 102A of the cylindrical member 102 as described above, rattling of the connection module 100 in the pipe connection portion 40 can be further suppressed.

  Further, in the first embodiment, the joint main body 32 is configured to include the three pipe connection portions 40 and the T-shaped communication portion 34 connecting the pipe connection portions 40, but the present invention is not limited to this configuration. It is not limited. For example, the joint main body may be configured to include two pipe connection parts 40 and a linear or L-shaped communication part connecting the pipe connection parts 40. In addition, the joint main body may be configured to include four or more pipe connection portions 40 and a communication portion that branches to four or more connecting the pipe connection portions 40.

  Furthermore, in the first embodiment, the connection module 50 and the connection module 100 are configured to be attachable to and detachable from the pipe connection unit 40, but the present invention is not limited to this configuration. For example, the connection module may be press-fit into the pipe connection portion, and the connection module may be inserted and held in the pipe connection portion.

  Furthermore, in the first embodiment, the protrusion 108 having the axial protrusion 108A and the circumferential protrusion 108B is formed on the cylindrical member 102 of the connection module 100, but the present invention is not limited to this configuration. . For example, the tubular member 102 may have a projecting portion extending in a spiral along the outer peripheral surface 102A, or a plurality of projecting portions extending while inclining with respect to the axial direction may be formed at intervals in the circumferential direction. Alternatively, a plurality of block-shaped protrusions may be formed. That is, the shape of the protruding portion is not limited as long as the backlash of the connection module 100 can be suppressed in the pipe connection portion 40.

  The embodiments of the present invention have been described above by referring to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the present invention. Further, it goes without saying that the scope of rights of the present invention is not limited to these embodiments.

Reference Signs List 30 pipe joint 32 joint body 40 pipe connection portion 40B inner circumferential surface 50 connection module (first connection module)
70 Blocking member 100 connection module (second connection module)
102A outer peripheral surface 108 projecting portion 108A axial projecting portion 108B circumferential projecting portion P1 piping (first pipe)
P2 piping (second piping)

Claims (4)

A joint body provided with a plurality of pipe connection parts of the same shape;
A tubular first connection module which is inserted and held in the tubular pipe connection portion and which has an inner shape into which the first pipe is inserted and which holds the inserted first pipe;
A cylindrical second member is inserted into and held in the pipe connection portion, and is an inner shape into which a second pipe having a smaller pipe diameter than the first pipe is inserted and which holds the inserted second pipe. Connection module,
Have
The first connection module and the second connection module are detachably mounted to the pipe connection portion, respectively, and are engaged with a blocking member detachably mounted to the pipe connection portion to prevent the detachment operation. ,
Wherein the first connection module and the second connection module, respectively, a projection projecting radially outwardly, said blocking member engageable with the engaging recess provided on the protrusions are formed,
The pipe connection portion includes a groove capable of guiding the protrusion in the pipe insertion direction, and extends in the circumferential direction through the groove so as to guide the protrusion in the circumferential direction, and the first connection module or the second connection module an opening for exposing the engagement recess in a state in which the connection module is mounted are formed,
The first connection module and the second connection module are exposed from the opening in a state in which the projection is attached to the pipe connection so as to be guided in the opening in the circumferential direction of the pipe connection. The piping joint in which the detachment operation is blocked by engagement of the blocking member with the engagement recess.   The plurality of second connection modules are provided at intervals in the circumferential direction, and each of the second connection modules includes a protrusion which protrudes radially outward from an outer peripheral surface and whose top abuts against an inner peripheral surface of the pipe connection portion. Piping joint as described in.   The piping joint according to claim 2, wherein the protrusion extends from one end side to the other end side in the axial direction of the second connection module.   The protrusion includes an axial protrusion extending along the axial direction of the second connection module, and a circumferential protrusion extending along the circumferential direction of the second connection module from the axial protrusion. The piping joint according to claim 3.

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