JP4612592B2 - Pipe joint - Google Patents

Description

  The present invention relates to a detachable pipe joint used when connecting a tube material such as a hose.

  2. Description of the Related Art Conventionally, there has been known a pipe joint that is detachably formed by attaching a male member to an end of a hose and attaching a female member to a receiving port. In general, the male member or the female member of the pipe joint is provided with a lock mechanism, and is formed so as to be detachable by connecting and releasing the lock mechanism to each other.

  In addition, the pipe joint disclosed in Patent Document 1 has a short cylindrical retaining member attached to the end of the hose, and a retaining member having a C-shaped cross section fitted to the outer periphery. The hose end is fitted in the joint body receiving port. In this pipe joint, with the retaining member inserted into the receptacle of the pipe joint body, the support member fitted to the retaining member is fitted into the groove formed inside the receptacle, so that the fitting is prevented from coming off. This is a pipe joint.

In addition, Patent Document 2 discloses a retaining member in which a male member, which is a tip of a hose opening to which an end of a hose is attached, has a C-shaped cross section and an outer peripheral surface is tapered in the longitudinal direction. A pipe joint provided with a collet is disclosed. In the female member into which the male member of the pipe joint is inserted, a sleeve into which a collet can be inserted and a recess in which the sleeve is slidably accommodated in the insertion direction of the male member are formed on the cylindrical inner wall surface. . When the male member is inserted into the female member and connected, and the male member is further pushed into the female member, the collet that slides with the male member is fitted into the sleeve, and the outer diameter of the collet is slightly increased. Get smaller. Thereafter, when the male member inserted into the female member is pulled, the collet has a smaller outer diameter than the retaining washer fixed to the female member receptacle, and the male member can be pulled out. A simple joint is disclosed.
JP 2000-74282 A JP-A-48-25918

  In the above prior art, the pipe joint attached to the end of the hose or the lock mechanism provided at the receiving port thereof is formed in a complicated structure, and the pipe joint portion is formed much thicker than the hose. For this reason, it is difficult to attach to a receptacle provided in a narrow place, and it takes time and labor when disassembling and cleaning. Also, because of the complicated structure, manufacturing and assembly costs are also incurred.

  In particular, in Patent Document 1, in order to form the shape of the male member to which the ring-shaped retaining member is attached into a special shape, it takes time for processing, and the pipe joint portion is formed thick. It was difficult to attach to the receptacle provided in the.

  Further, in Patent Document 2, it takes time and effort to attach a collet as a retaining member to a male member attached to the end of the hose, and the structure is complicated and the production cost is high. In addition, since a collet is inserted in the receiving port and a sleeve material is formed so that the inner periphery is slidable in the depth direction, the structure is complicated and expensive.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a pipe joint that has a simple structure, does not cost much, and is easy to attach and detach in a narrow place.

The present invention has an insertion portion to which a tube material such as a hose can be connected at one end portion, an insertion insertion portion at the other end portion, an uneven attachment portion at the middle portion, and a through hole in the axial direction. And a lock ring that is cut in the axial direction by a slit and formed into a substantially ring shape so that it can be attached to the mounting portion, and a locking portion is formed on the outer periphery of one end portion. provided with a communicating hole in which the fitting portion of the male member is communicated with the through hole is inserted, the locking portion of the locking ring is provided with a lockable engaged portion on the inner surface of the communication hole A pipe joint comprising a female member. The lock ring is provided so that movement in the axial direction is restricted and the diameter can be reduced in the radial direction in a state where the lock ring is fitted to the outer periphery of the attachment portion of the male member. Inserted into the communication hole of the female member together with the member, the locking portion and the locked portion engage in the communication hole of the female member, and the outer peripheral portion of the mounting portion is outside the female member. The engagement between the locking portion and the locked portion can be released by positioning and reducing the diameter of the lock ring.

  Further, the lock ring and the male member are formed to have a thickness approximately equal to the outer diameter of the tube material in a state of being attached to the female member.

Further, the engaging portion of the female member and the locking portion of the locking ring and has at least one chamfered portion of the contact portion of one another when said male member insertion.

  Further, the O-ring is fitted into an O-ring groove formed on either the inner peripheral surface of the socket fitting or the outer peripheral surface of the insertion portion of the male member located in the communication hole of the female member, and the surface of the other member And the O-ring are in close contact.

According to the pipe joint of the present invention, fitted with a ring-shaped locking ring to the mounting portion of the male member, by reducing the outer diameter of the lock ring, the male member is easily detachably formed with respect to the female member It can be formed thin with a simple structure, and can be formed with a minimum number of members without increasing the outer diameter. As a result, it is possible to form a pipe joint that is not costly and can be easily attached to a narrow place.

  Embodiments of the pipe joint according to the present invention will be described below with reference to the drawings. 1 to 4 show a pipe joint according to a first embodiment of the present invention. The pipe joint 10 of this embodiment is used for connecting hoses 12 such as silicone resin as a tube material or for a receiving port (not shown). The end of the hose 12 is connected. As shown in FIGS. 1A and 1B, the pipe joint 10 has two female members 14 that open in the same direction and are integrally fixed in parallel to form a socket 16.

  As shown in FIG. 2, the female member 14 comprises a socket metal fitting 15 formed in a cylindrical shape with a metal such as brass and an insert metal fitting 17 fitted to the tip thereof, and a communication hole 14a is formed in the axial direction. Has been. The outer periphery of the portion in which the insert metal fitting 17 is fitted to the socket metal fitting 15 is formed to have a smaller diameter than the outer periphery of the other portion, and the end of the insert metal fitting 17 is provided with irregularities to which the molded resin bites. Then, the insert fitting 17 of the pair of female members 14 is integrally insert-molded with resin, and the mold portion 13 is provided on the outer peripheral portion of one end of the socket 16.

  At the end of the socket member 15 of the female member 14 located on the opposite side of the mold part 13 of the socket 16, a locked portion 18 protruding to the inner peripheral surface side of the communication hole 14 a is formed. Two O-ring grooves 20 are formed concentrically on the inner peripheral surface at the back. The protrusion forming the locked portion 18 has a chamfered portion on the opening portion side of the female member 14, and the corner of the protrusion 19 at the boundary between the locked portion 18 and the O-ring groove 20 is also on the opening portion side. Has a chamfered portion. A locked groove 21 is formed between the ridge 19 of the O-ring groove 20 and the locked portion 18. Then, an O-ring 22 having an appropriate thickness such as rubber is fitted into the O-ring groove 20 as shown in FIG.

  As shown in FIG. 3, the male member 24 inserted into the female member 14 is formed of a metal such as brass, and has a fitting insertion portion 26 formed in a cylindrical shape and inserted into the female member 14 at one end. Is provided. Further, the outer peripheral surface of the central portion of the male member 24 is provided with an attachment portion 28 to which a lock ring 32 described later is attached, and annular protrusions 28a and 28b on both sides thereof. , A and 28b are formed in a concave groove shape. On the opposite side of the male member 24 from the insertion portion 26, there is provided an insertion portion 30 which is narrower than the insertion portion 26 and concentrically formed on the outer peripheral surface and has irregularities formed at appropriate intervals. Then, the through hole 24a is formed concentrically in the axial direction, the inner diameter of the insertion portion 30 of the through hole 24a is formed relatively thin, and from the position where the attachment portion 28 is formed toward the insertion portion 26, The inner peripheral surface extends in a taper shape and is formed with a large diameter.

  As shown in FIGS. 4 (a) and 4 (b), a lock ring 32 formed in a cylindrical shape from a resin having an appropriate elasticity is attached to the attachment portion 28 of the male member 24. As shown in FIG. 4A, the lock ring 32 is provided with a slit 34 having an appropriate width in a state where a part of the cylinder is cut in the axial direction. Further, as shown in FIG. 4B, a locking groove 36 having an appropriate width is provided concentrically near one end portion of the outer periphery. The end of the lock ring 32 on the side of the locking groove 36 is slightly smaller in diameter than the other outer peripheral surface, and a chamfered portion is formed on the outer peripheral edge on the opening side, and a step portion between the locking ring 36 and the locking groove 36 is engaged. A stop 38 is provided.

  A mounting groove 40 having an appropriate width is formed concentrically on the inner peripheral surface of the end of the lock ring 32 opposite to the engaging portion 38. The opening-side inner peripheral portion adjacent to the mounting groove 40 is formed to have a slightly smaller diameter than the inner peripheral surface of the locking groove 36, and is used as a fitting protrusion 41 that fits into the mounting portion 28 of the male member 24. Is provided. The fitting ridge 41 is formed to have a width and a diameter that can be fitted into the groove of the mounting portion 28 of the male member 24. Similarly, the fitting ridge 41 is formed to have a width and a diameter that allows the projection 28a to be fitted into the mounting groove 40. Even when the ring 32 has a reduced amount of play due to the slit 34, the fitting protrusion 41 is loosely fitted with a slight gap at the groove bottom of the mounting portion 28, and the outer diameter of the locking portion 38 is female. It is formed to be slightly smaller than the inner diameter of the locked groove 21 of the member 14. The lock ring 32 is restricted from moving in the central axis direction by the fitting protrusion 41 of the lock ring 32 attached to the attachment portion 28 of the male member 24, and the diameter thereof can be easily reduced. Thus, it is rotatably attached to the male member 24.

  In the state where the male member 24 is inserted into the female member 14, the lock ring 32 has the engaged portion 18 of the female member 14 in the engagement groove 36 of the lock ring 32 as shown in FIG. The locking portion 38 of the lock ring 32 is fitted into the locked groove 21 of the female member 14, and the locking portion 38 and the locked portion 18 are engaged with each other. At this time, the two O-rings 40 fitted in the O-ring groove 20 of the female member 14 are in close contact with the outer peripheral surface of the fitting insertion portion 26 of the male member 24 in an airtight and liquid-tight state.

  The insertion portion 30 of the male member 24 is fitted with an end portion of a hose 12 made of, for example, flexible silicone resin, and the end portion of the hose 12 on the insertion portion 30 side is made of a protective metal. A sleeve 42 is put on and fixed.

  Next, a method for attaching and detaching the pipe joint 10 of this embodiment will be described. First, when mounting, the fitting insertion part 26 of the male member 24 to which the hose 12 is connected is inserted into the socket fitting 15 of the female member 14. At this time, the chamfered portion of the locking portion 38 contacts the chamfered portion of the locked portion 18 of the socket fitting 15, and the lock ring 32 narrows the lock ring 32 from the outside toward the center within the width of the slit 34. As a result, the outer diameter of the lock ring 32 is easily reduced, and the outer surface of the locking portion 38 of the lock ring 32 is pressed against the inner peripheral surface of the locked portion 18 while the male member 24 is connected to the female member 14. It is pushed into the socket fitting 15. Even in this state, the inner diameter of the lock ring 32 is slightly larger than the outer diameter of the fitting insertion portion 26 of the male member 24, and the fitting protrusion 41 of the lock ring 32 moves to the groove bottom of the mounting portion 28 of the male member 24. The diameter of the lock ring 32 is reduced so that the protrusion 28a of the attachment portion 28 is inserted deeper into the groove bottom portion of the attachment groove 40 of the lock ring 32.

  And when the latching | locking part 38 exceeds the to-be-latched part 18, the diameter of the lock ring 32 will return to the original by own elasticity, and the to-be-latched part 18 formed in the socket metal fitting 15 inner peripheral surface of the female member 14 The locking portion 38 of the lock ring 32 is locked, and the male member 24 is connected to the female member 14 while being prevented from coming off. Further, the O-ring 22 in the socket metal fitting 15 is in close contact with the fitting insertion portion 26 of the male member 24, and the internal space of the female member 14 and the male member 24 is connected in an airtight and liquid tight state.

  In order to remove the male member 24 from the female member 14, the lock ring 32 is pressed from both sides so as to be sandwiched from the outside toward the center so as to narrow the width of the slit 34. When the outer diameter of the locking portion 38 of the lock ring 32 is equal to or smaller than the inner diameter of the locked portion 18, the male member 24 can be pulled out from the female member 14 of the socket 16 as it is, and the male member 24 is pulled from the female member 14. Comes off.

  According to the pipe joint 10 of this embodiment, the male member 24 and the female member 14 can be easily connected by the lock ring 32 attached to the attachment portion 28 of the male member 24, and the lock ring 32 is also pointed to be removed. It is possible to pull out from the female member 14 by narrowing the outer diameter using the width of the slit 34 by sandwiching it with a jig or a jig, and the thickness of each part can be reduced with a simple structure. As a result, the outer diameter of the pipe joint 10 can be reduced, and the pipe joint 10 that is approximately the outer diameter of the hose 12 can be formed. Moreover, since it is a simple structure, it does not cost. Furthermore, since the outer diameter of the hose 12 and the outer diameters of the female member 14 and the male member 24 are substantially the same, the hose 12 can be easily attached to a mounting portion provided in a narrow place, and the space efficiency is good. Furthermore, since there are few components and decomposition | disassembly cleaning etc. are also possible easily, it can be used in a clean state.

  Next, a second embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the pipe joint 10 of this embodiment, two O-ring grooves 20 are concentrically provided on the outer peripheral surface of the fitting insertion portion 26 of the male member 24. The O-ring groove 20 is fitted with an O-ring 22 having an appropriate thickness made of an elastic body such as rubber. When the male member 24 is inserted into the female member 14, the inner peripheral surface of the socket fitting 15 of the female member 14 with which the O-ring 22 abuts is formed as a smooth surface, and the O-ring 22 is in an airtight and liquid-tight state. It is formed so that it can adhere to.

  Also in this embodiment, the male member 24 and the female member 14 can be easily attached and detached by the lock ring 32 attached to the attachment portion 28 of the male member 24, and the cost is low with a simple structure. . Further, since the outer diameter of the hose 12 and the outer diameters of the female member 14 and the male member 24 are substantially the same, it is easy to attach even a receiving port provided in a narrow place, and the space efficiency is good. Further, since the O-ring 22 is attached to the male member 24, cleaning and replacement such as cleaning of the O-ring 22 and the O-ring groove 20 are easy.

  Next, a third embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the pipe joint 10 of this embodiment, as shown in FIGS. 6 (a) and 6 (b), the lock ring 32 attached to the male member 24 is formed of a cylindrical resin having a suitable elasticity. And the latching | locking part 38 which consists of a protruding item | line formed in the appropriate height concentrically at the one end edge part of outer periphery is provided. Further, a slit 34 having a slight gap is formed in a state in which the cylinder is broken in the central axis direction. Further, a chamfered portion is formed at the outer edge portion of the locking portion 38.

  Furthermore, as shown in FIG. 7, the fitting insertion portion 26 of the male member 24 is formed to have an outer diameter smaller than the central portion of the male member 24 from the central portion of the male member 24 through the attachment portion 28. The entire lock ring 32 is fitted to the mounting portion 28 with its movement restricted in the axial direction.

  At the edge of the opening of the female member 14 into which the male member 24 is inserted, a locked portion 18 provided with an inclined portion composed of a chamfered portion having an appropriate width is formed from the opening side. The inner peripheral surface on the inner side of 18 is concentrically provided as a locked O-ring groove 44 that also functions as a locked groove and an O-ring groove. Further, an O-ring groove 20 is formed concentrically with a slight gap inside. Further, a slight step is provided in the depth direction, and the inner diameter is formed slightly smaller. An O-ring 22 having an appropriate thickness is inserted into the locked O-ring groove 44 and the O-ring groove 20.

Also in this embodiment, when the male member 24 is inserted into the female member 14, the locking portion 38 of the lock ring 32 is locked to the locked portion 18, and the female member 14 and the male member 24 are connected. In this embodiment, slightly reduced Umate the outer diameter of the lock ring 32, by slamming the fitting portion 26 of the male member 24 into the female member 14, easily, the locking portion 38 of the lock ring 32 is a female member 14, the male member 24 is connected to the female member 14. Also, when removing the lock ring 32, the outer diameter of the lock ring 32 can be reduced in the same manner as described above.

  In addition, the pipe joint of this invention is not limited to the said embodiment, The outer diameter and internal diameter of a male member and a female member, the thickness of tube materials, such as a hose connected to a male member, or a female member is provided. It can be appropriately set according to the size of the tube material or the mounting portion of the apparatus. Moreover, the shape of each part etc. can be set suitably. Furthermore, the shape and material of each member can be appropriately changed.

It is the partially broken left view (a) which shows the use condition of the pipe joint of 1st embodiment of this invention, and a front view (b). It is a fragmentary sectional view which shows the female member of the pipe joint of this embodiment. It is a fragmentary sectional view which shows the male member of the pipe joint of this embodiment. It is the rear view (a) of the lock ring with which the male member of the pipe joint of this embodiment is mounted | worn, and a partially broken right view (b). It is the partially broken left view (a) which shows the use condition of the pipe joint of 2nd embodiment of this invention, and a front view (b). It is the partially broken left view (a) of the lock ring with which the male member of the pipe joint of a third embodiment of this invention is attached, and a front view (b). It is a fragmentary sectional view which shows the use condition of the pipe joint of 3rd embodiment of this invention.

DESCRIPTION OF SYMBOLS 10 Pipe joint 12 Hose 14 Female member 14a Communication hole 15 Socket metal fitting 18 Locked part 20 O ring groove 21 Locked groove 22 O ring 24 Male member 24a Through hole 26 Insertion part 28 Attachment part 30 Insertion part 32 Lock ring 34 Slit 36 Locking groove 38 Locking part 40 Mounting groove 41 Fitting protrusion

Claims (4)

A male member having an insertion portion to which a tube material can be connected at one end, a fitting insertion portion at the other end, an uneven attachment portion at an intermediate portion, and a through hole in the axial direction; A lock ring that is cut in the axial direction by a slit and is formed in a substantially ring shape so that it can be attached to the mounting portion, and a locking portion is formed on the outer periphery of one end portion; and provided with a communicating hole through which the inserting portion is communicated with the through hole is inserted, consists of a female member of the locking portion of the locking ring is provided with a lockable engaged portion on the inner surface of the communication hole The lock ring is provided so that the movement in the axial direction is restricted and the diameter of the lock ring can be reduced in the radial direction while being fitted to the outer periphery of the attachment portion of the male member. Inserted into the communicating hole of the female member together with the male member, The engaging portion and the engaged portion are engaged in the communication hole of the female member, and the outer peripheral portion of the attachment portion is located outside the female member, and the engagement portion is reduced by reducing the diameter of the lock ring. A pipe joint characterized in that the engagement between the stopper and the locked part can be released .   2. The pipe joint according to claim 1, wherein the lock ring and the male member are formed to have a thickness approximately equal to the outer diameter of the tube member when attached to the female member. Wherein the engaging portion of the engaging portion of the lock ring and the female member, according to claim 1 or 2 wherein the pipe joint has a chamfer on at least one of the mutual contact portion when said male member insertion.   An O-ring is fitted into an O-ring groove formed on either the inner peripheral surface of the socket fitting located in the communication hole of the female member or the outer peripheral surface of the fitting insertion portion of the male member, and the surface of the other member and the The pipe joint according to claim 1 or 2, wherein the O-ring is in close contact.

Images