JPH0583583U - Pipe fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe joint that does not inadvertently separate even when a high-pressure fluid acts and can separate as desired. A male member having an insertion shaft portion having a shallow circumferential groove on an outer peripheral surface, an insertion hole into which the insertion shaft portion is inserted, and a wide and wide inner peripheral surface of the insertion hole. When the female member having the peripheral groove and the male member and the female member are in the connected state, the inner peripheral portion is accommodated in the shallow peripheral groove and the outer peripheral portion is accommodated in the wide peripheral groove, and the inner peripheral portion in a natural state is formed. An elastic ring body whose diameter is at least smaller than the outer peripheral diameter of the insertion shaft portion and whose thickness is set to be smaller than the width of the wide circumferential groove, and an elastic ring body which is provided in the deep area of the wide circumferential groove. Of the inner circumferential end and the elastic ring body that is fitted in the insertion hole of the female member so as to move forward and backward and is housed in the shallow circumferential groove, facing the deep circumferential groove. And the movement of the elastic ring body in the axial direction by the inner wall and the inner wall forming the deep groove. And a thin cylindrical body for preventing the above.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint of a type in which an elastic ring body mounted in a female member is expanded / contracted to lock / unlock a male member or the like inserted in the elastic ring body.

[0002]

[Prior Art]

 An example of this type of pipe joint is shown in FIG. As shown in the figure, the joint main body 8 is formed with a tapered surface 80 on the inside thereof and a collet 9 which can be expanded and reduced in diameter is provided inside the joint main body 8. The hose H inserted in the collet 9 can be connected / disconnected by contacting / separating with 80.

As shown in the same figure, the collet 9 has a cylindrical shape with both ends open, and is provided with a plurality of slits 90 that open at the insertion side end so that the diameter can be expanded and contracted. In order to expand / contract the insertion side end of the portion between the slits 90 in the collet 9, there is provided an outward projecting portion 91 which projects outward toward the insertion end and is brought into engagement with the tapered surface 80. A locking claw 92 protruding inward is formed in order to secure the locking to H.

Therefore, in the above pipe joint, when the fluid pressure acts in the state where the hose H is inserted in the collet 9 (when the force in the direction in which the hose H pops out from the pipe joint acts), the movement of the collet 9 is moved. As a result, the diameter of the insertion side end is reduced, whereby the locking claw 92 bites into the hose H, and the hose H is prevented from coming off. When a pipe fitting of the above type is used for high-pressure fluid, for example, a configuration in which a hard pipe is directly inserted or a hard (metal or hard synthetic resin) male member is inserted in a female member is considered. However, in the case of such a configuration, since the locking claw 92 does not cut into the outer surface of the pipe or the male member, there is a possibility that the pipe or the male member may come off at the same time when pressure is applied, Very dangerous.

[0005]

[Problems to be solved by the device]

 Therefore, it is an object of the present invention to provide a pipe joint which is not separated carelessly even when a high-pressure fluid acts and can be separated as desired.

[0006]

[Means for Solving the Problems]

 According to another aspect of the present invention, there is provided a pipe joint including a male member having an insertion shaft portion having a shallow circumferential groove on an outer peripheral surface thereof, an insertion hole into which the insertion shaft portion is inserted, and the insertion hole. A female member having a wide wide circumferential groove on its inner peripheral surface, and the inner peripheral portion is housed in the shallow peripheral groove and the outer peripheral portion has a wide peripheral groove when the male member and the female member are in a connected state. And an elastic ring body that is accommodated in the inner peripheral diameter in a natural state and is set to have a diameter smaller than at least the outer peripheral diameter of the insertion shaft portion and a thickness smaller than the width of the wide peripheral groove, and the inner side of the wide peripheral groove. A deep circumferential groove portion provided in the region and capable of accommodating the entire elastic ring body, and the elastic ring body fitted in the insertion hole of the female member so as to be able to advance and retract and accommodated in the shallow circumferential groove. When facing the groove, the inner end and the depth side vertical wall that constitutes the deep groove described above And comprising a thin cylindrical body to prevent axial movement of the serial elastic ring.

The pipe joint according to the second aspect of the present invention comprises a male member having an insertion shaft portion having a wide circumferential groove with a wide outer peripheral surface, and an insertion hole into which the insertion shaft portion is inserted. And a female member having a shallow circumferential groove on the inner circumferential surface of the insertion hole, and the outer peripheral portion is accommodated in the shallow circumferential groove and the inner circumferential surface when the male member and the female member are in a connected state. An elastic ring body whose portion is accommodated in the wide circumferential groove, the outer diameter of which in a natural state is at least larger than the inner circumferential diameter of the insertion hole and the thickness of which is smaller than the width of the wide circumferential groove; A deep circumferential groove portion provided in a deep area and capable of accommodating the entire elastic ring body, and a deep circumferential portion of the elastic ring body fitted in the insertion hole of the female member so as to be movable back and forth and accommodated in the shallow circumferential groove. When facing the groove, the inner end and the back side vertical wall that constitutes the deep groove described above And a thin cylindrical body that prevents the elastic ring body from moving in the axial direction.

[0008]

[Action]

 The invention of this application has the following actions. (Operation of the invention according to claim 1 or 2) In this pipe joint, when the male member and the female member are in the connected state, the inner peripheral portion of the elastic ring body is accommodated in the shallow peripheral groove of the insertion shaft portion and is elastic. Since the outer peripheral portion of the ring body is housed in the wide circumferential groove, when the fluid pressure acts on the pipe, the constituent wall of the shallow circumferential groove and the connecting end side constituent wall of the wide circumferential groove are locked via the elastic ring body. The female member and the male member are not inadvertently separated even when a high fluid pressure is applied.

The female member and the male member can be easily separated by operating in the following order. ． First, in the above state, the male member is pushed into the female member so that the elastic ring body accommodated in the shallow circumferential groove faces the deep circumferential groove portion. ． Next, the thin cylindrical body is pushed in, and the inner end of the thin cylindrical body and the back side vertical wall forming the deep groove portion prevent the elastic ring body from moving in the axial direction. ． Subsequently, while maintaining the above state, an external force is applied to separate the female member and the male member. Then, the elastic ring body is expanded (reduced in diameter in the pipe joint of the invention according to claim 2) while following the wall surface forming the shallow circumferential groove so that the entire elastic ring body is accommodated in the deep circumferential groove portion. Is separated from the shallow groove, and the female member and the male member can be separated.

[0010]

【Example】

 Hereinafter, the configuration of the invention of this application will be described with reference to the drawings shown as examples. As shown in FIGS. 1 and 2, the pipe joint of this embodiment is inserted into a female member A in which an elastic ring body 4 which can be expanded and contracted is mounted, and an insertion hole a of the female member A. And a male member B having an insertion shaft portion b. As shown in FIGS. 6 to 8, the insertion shaft portion b of the male member B is locked / engaged by the expansion / contraction diameter of the elastic ring body 4. The lock is released, and the male and female members A and B are connected and separated from each other.

As shown in FIGS. 1 and 2, the female member A includes a female main body 1, an O-ring 2, a backup ring 3, an elastic ring body 4, and a holding body 5. As shown in FIGS. 1 and 2, the female main body 1 is a tubular body having a small diameter hole portion 1a, a medium diameter hole portion 1b, and a large diameter hole portion 1c, and the outer peripheral side corresponding to the small diameter hole portion 1a. The tubular body 10 is caulked to the portion, and a stepped portion 13 is formed by forming a small diameter portion 12 on the mounting portion side of the outer peripheral surface of the tubular body 10.

As shown in FIG. 2, the large-diameter hole portion 1c is provided with a wide circumferential groove 6 having a wide width on the inner peripheral surface thereof, and the opening side portion of the wide circumferential groove 6 will be described later. The diameter of the cylindrical body 51 is expanded by the thickness of the cylindrical body 51 (this expanded diameter portion is referred to as the cylindrical body housing portion 14). Then, as shown in the figure, a deep circumferential groove portion 61 capable of accommodating the entire elastic ring body 4 is formed in the deep area of the wide circumferential groove 6.

As shown in FIG. 2, the medium-diameter hole portion 1b is provided with an O-ring mounting portion 11 on the inner peripheral surface of which the O-ring 2 and the backup ring 3 are accommodated. As shown in FIGS. 1 and 2, the elastic ring body 4 is composed of a C-shaped ring having a circular cross section, and has an inner diameter in a natural state at a shallow circumferential groove 72 (described later) at the male member B side. It is set so as to approximately match the outer diameter of the. Then, as shown in FIG. 2, the elastic ring body 4 is mounted in the female member A so as to be accommodated in the wide circumferential groove 6 described above.

As shown in FIGS. 1 and 2, the holding body 5 is integrally pushed by a holding member 50 having a long tubular shape that is externally inserted into the female main body 1 so as to be able to advance and retreat, and the holding member 50 is pushed. It is composed of a thin cylindrical body 51. The holder 50 is made of an elastic synthetic resin, and as shown in the figure, is a tubular member having holes formed in the order of the small diameter hole portion 5a, the large diameter hole portion 5b, and the medium diameter hole portion 5c. Then, the stepped portion 52 that engages with the stepped portion 13 of the female main body 1 is configured by the step difference between the large diameter hole portion 5b and the medium diameter hole portion 5c. As shown in FIGS. 1 and 2, the holder 50 is provided with a flange portion 53 projecting outwardly at the open portion of the large diameter hole portion 5b and facing the large diameter hole portion 5b. 4 slits 54 are formed to be opened.

As shown in the figure, the thin tubular body 51 is housed in the tubular body housing portion 14 so as to be movable back and forth, and its inner diameter is made to substantially match the size of the small diameter hole portion 5a. The outer diameter is set to be slightly smaller than the diameter of the cylindrical housing portion. Then, as shown in FIG. 3, the female main body 1 and the holder 50 are stepped when the holder 50 is pushed and the inner end of the thin cylindrical body 51 is in contact with the elastic ring body 4. The portion 52 and the stepped portion 13 are set so as to substantially face each other.

On the other hand, the male member B is, as shown in FIGS. 1 and 2, a pipe connecting portion 70, a tool corresponding portion 71, and an insertion shaft inserted into the insertion hole a of the female member A as described above. Part b. As shown in the figure, the insertion shaft portion b has a small diameter portion 73 formed slightly smaller than the middle diameter hole portion 1b and a large diameter portion 74 formed slightly smaller than the large diameter hole portion 1c. And a taper portion 75 connecting the large diameter portion 74 and the small diameter portion 73. As shown in the figure, the large-diameter portion 74 is provided with a shallow circumferential groove 72 having a substantially arcuate cross section and having a diameter slightly larger than the wire diameter of the elastic ring body 4, and the depth thereof is elastic. It is set to about 1/3 of the wire diameter of the ring body 4.

Since the pipe joint of this embodiment is configured as described above, it can be connected and disconnected in the following manner. (When connecting). First, a pipe is screw-connected to the pipe connecting portion 70 of the male member B, while a pressure resistant tube is caulked to the female main body 1 and the cylindrical body 10 mutual pipe, and then the insertion shaft portion b of the male member B is female. It is inserted into the insertion hole a of the member A. Then, as the insertion shaft portion b is inserted, the elastic ring body 4 is expanded along the outer circumferences of the tapered portion 75 and the large diameter portion 74 in the insertion shaft portion b, as shown in FIG. Then, when the insertion shaft portion b is further pushed from the above state, as shown in FIG. 3, the inner peripheral portion of the elastic ring body 4 is inserted into the shallow circumferential groove 72 formed in the insertion shaft portion b. ． When the fluid pressure acts from the above-mentioned state, the male member B is moved in the direction of jumping out from the female member A, and the elastic ring body 4, as shown in FIG. The connecting end side constituent wall is locked via the elastic ring body 4, and the female member A and the male member B are not inadvertently separated even when a high fluid pressure is applied. (When separating) In order to separate the female member A and the male member B from each other, the male member B is pushed into the female member A from the above state in a state where the fluid is released, and as shown in FIG. The accommodated elastic ring body 4 is opposed to the deep groove portion 61. ． Next, the thin tubular body 51 is pushed in through the holding tool 50 as shown in the same drawing, and the inner end of the thin tubular body 51 and the back side vertical wall forming the deep groove portion 61 are oriented in the axial direction of the elastic ring body 4. Prevent the movement of. ． Subsequently, as shown by the chain double-dashed line in FIG. 5, the collar portion 53 of the holder 50 is pushed against the elastic force to lock the stepped portions 52 and 13 together, and while maintaining this state, An external force is applied to separate the female member A and the male member B from each other. Then, as shown in FIGS. 6 to 8, the diameter of the elastic ring body 72 is expanded while following the wall surface forming the shallow circumferential groove 72, and the elastic ring body 72 is elastically housed in the deep circumferential groove portion 61. The ring body 4 separates from the shallow circumferential groove 72, and the female member A and the male member B can be separated.

It should be noted that, instead of the above embodiment, a wide circumferential groove and a deep circumferential groove portion are provided on the outer circumferential surface of the insertion shaft portion b, and a shallow circumferential groove is provided on the inner circumferential surface of the large diameter hole portion 1c. In addition, by setting the diameter larger than the circumferential diameter of the large diameter hole portion 1c of the elastic ring body 4, the high pressure fluid does not cause careless separation and can be separated as desired, as in the above embodiment. Becomes Further, the holder 5 described in the section of means is not limited to the embodiment of the above-mentioned embodiment, and for example, the embodiment shown in FIGS. 9 and 10 can also be adopted. That is, an inwardly projecting tongue piece 56 is provided on the inner peripheral surface of the holder 50 ′, and an outwardly projecting tongue piece 16 is provided on the outer peripheral surface of the female main body 1, so that the inwardly projecting tongue piece 16 is formed by rotating the holder 50 ′. If the tongue piece 56 and the outwardly projecting tongue piece 16 are configured to be engageable with and disengageable from each other, the holder 5 has the same function as the holder 5 of the above-described embodiment.

Further, instead of the elastic ring body of the above-mentioned embodiment, an elastic ring body formed by forming a coil spring having a small coil diameter in a circular shape can be adopted.

[0020]

[Effect of the device]

 Since the invention of this application has the above-mentioned configuration, it has the following effects. Based on the contents described in the column of action, it was possible to provide a pipe joint that does not inadvertently separate even when high-pressure fluid acts and can separate as desired.

[Brief description of drawings]

FIG. 1 is an exploded sectional perspective view of a pipe joint according to an embodiment of the present invention.

FIG. 2 is a sectional view of a female member and a male member of the pipe joint.

FIG. 3 is a view showing a state where a deep circumferential groove portion and an elastic ring body inserted in a shallow circumferential groove of the pipe joint face each other.

FIG. 4 is a view showing a relationship between a male member and a female member when a fluid pressure is applied from the state of FIG.

FIG. 5 is an explanatory view for separating a male member and a female member in the pipe joint.

FIG. 6 is a view showing a state where the elastic ring body of the pipe joint is separated from the shallow circumferential groove, and is a state in which the elastic ring body is still inserted in the shallow circumferential groove.

FIG. 7 is a view showing a state in which the elastic ring body of the pipe joint is separated from the shallow circumferential groove, and is a state in which the elastic ring body is slightly separated from the shallow circumferential groove.

FIG. 8 is a view showing a state where the elastic ring body of the pipe joint is separated from the shallow circumferential groove, and is a view in a state where the elastic ring body is completely separated from the shallow circumferential groove.

FIG. 9 is a view showing a holding body of another configuration of the pipe joint, showing a state in which the outwardly projecting tongue piece and the inwardly projecting tongue piece are disengaged.

FIG. 10 is a view showing a holding body of another configuration of the pipe joint, showing a state in which an outwardly projecting tongue piece and an inwardly projecting tongue piece are engaged with each other.

FIG. 11 is a cross-sectional view of a conventional collet type pipe joint.

[Explanation of symbols]

 A female member B male member a insertion hole b insertion shaft portion 4 elastic ring body 5 holding body 6 wide circumferential groove 51 thin cylindrical body 61 deep circumferential groove portion 72 shallow circumferential groove

Claims (3)

[Scope of utility model registration request] 1. A male member having an insertion shaft portion having a shallow circumferential groove on an outer peripheral surface, an insertion hole into which the insertion shaft portion is inserted, and a width on an inner peripheral surface of the insertion hole. When a female member having a wide wide circumferential groove and the male member and the female member are in a connected state, the inner circumferential portion is housed in the shallow circumferential groove and the outer circumferential portion is housed in the wide circumferential groove, and in a natural state. An elastic ring body whose inner diameter is set to be at least smaller than the outer diameter of the insertion shaft portion and whose thickness is set to be smaller than the width of the wide circumferential groove; In the state in which the deep circumferential groove portion capable of accommodating the entire ring body and the elastic ring body fitted in the insertion hole of the female member so as to move forward and backward and accommodated in the shallow circumferential groove are opposed to the deep circumferential groove portion, In the axial direction of the elastic ring body by the one end and the back side vertical wall forming the deep groove portion. A pipe joint having a thin cylindrical body for preventing movement. 2. A male member having an insertion shaft portion having a wide circumferential groove on the outer peripheral surface, and an insertion hole into which the insertion shaft portion is inserted, and an inner peripheral surface of the insertion hole. In the natural state, the female member having a shallow circumferential groove in the inner peripheral portion is accommodated in the shallow peripheral groove while the outer peripheral portion is accommodated in the shallow peripheral groove when the male member and the female member are in the connected state. An elastic ring body whose outer diameter is at least larger than the inner diameter of the insertion hole and whose thickness is set smaller than the width of the wide circumferential groove, and the entire elastic ring body provided in the deep area of the wide circumferential groove. In a state in which the deep circumferential groove portion capable of accommodating and the elastic ring body fitted in the insertion hole of the female member so as to move forward and backward and accommodated in the shallow circumferential groove face the deep circumferential groove portion, The longitudinal wall forming the deep groove prevents the elastic ring body from moving in the axial direction. A pipe joint equipped with a thin cylindrical body. 3. The pipe joint according to claim 1 or 2, further comprising a holder for holding the thin cylindrical body at that position in a state in which the elastic ring body is prevented from moving in the axial direction. And pipe fittings.