JP6249917B2 - Pipe fitting device - Google Patents

Description

  The present invention relates to a pipe joint device, and more particularly, to a pipe joint device that prevents fluid from being removed when fluid is in communication.

  Injection molds, rolling devices, and the like are provided with a plurality of fluid passages for passing cooling water and the like. In these molds and rolling apparatuses, the fluid inlets of a plurality of fluid passages are gathered in one place, and fluid supply from the outside to these fluid passages and supply interruption can be performed in one operation. Various pipe joint devices have been developed for this purpose.

  For example, Japanese Patent Laid-Open No. 8-4968 (Patent Document 1) and Japanese Patent No. 5047292 (Patent Document 2) disclose a male unit having a plurality of male pipe joints and a female unit having a plurality of female pipe joints. There is disclosed a pipe joint device comprising: In these devices, a plurality of male pipe joints and a plurality of female pipe joints corresponding to each other are connected to each other by bringing the male unit and the female unit relatively close to each other. A pipe joint device is disclosed in which the male unit and the female unit are locked (locked) so that the male unit and the female unit are not separated by the locking device (lock device) in the state. In these pipe joint devices, one of the male unit and the female unit is set as a fluid inlet of a die or a rolling device, and the other is set as a fluid supply port from an external fluid source.

JP-A-8-4968 Patent No. 5047292

  The pipe joint devices disclosed in Patent Documents 1 and 2 sometimes connect a plurality of pipe joints, and the pressure of the fluid as a whole passing through the plurality of fluid passages connected by these pipe joints is large. It becomes. This fluid pressure acts to separate the male and female pipe joints. Therefore, the locking device described above reliably connects the pipe joints while such fluid pressure is applied. It is desirable to maintain However, the locking device in the pipe joint device disclosed in Patent Documents 1 and 2 does not depend on whether the fluid passage of the mold or the rolling device is in communication with the external fluid source, that is, the fluid pressure as described above is applied. Regardless of whether or not it is locked, it can be operated so as to release the lock. Therefore, there is a possibility that the locking device may be unlocked due to an erroneous operation by an operator and an unexpected situation may occur.

  It is an object of the present invention to provide a pipe joint device that associates a locking device with a fluid pressure as described above and prevents the locking device from being unlocked while the fluid pressure is applied.

That is, the present invention
A male unit having a male pipe joint and a female unit having a female pipe joint connected to the male pipe joint, the male unit and the female unit being relatively close to each other In the pipe joint device that connects the male pipe joint and the female pipe joint by:
A connecting shaft provided on one of the male unit and the female unit;
A shaft receiving portion that is provided on the other of the male unit and the female unit, and that receives the connecting shaft when the male fitting and the female fitting are connected;
Have
The shaft receiving part is
A locking position that is radially displaceable relative to the received connecting shaft and that engages the received connecting shaft to prevent the connecting shaft from coming out of the shaft receiving portion; A locking member that is displaceable between a locking release position that allows the connecting shaft to be displaced radially outward to allow the connecting shaft to come out of the shaft receiving portion;
The locking member is displaceable in the axial direction of the connecting shaft received in the shaft receiving portion, and engages with the locking member at a radially outer position of the locking member at the locking position so that the locking member moves radially outward. And a displacement prevention member that is displaceable between a displacement prevention position that prevents the locking and a displacement allowable position that displaces from the displacement prevention position and allows the locking member to be displaced to the locking release position. And
The locking member in the locking position is shaped to receive a force that is displaced outward in the radial direction by the connecting shaft when the connecting shaft receives a pulling force in a direction in which the connecting shaft is pulled out from the shaft receiving portion. And
The displacement prevention member at the displacement prevention position is configured to prevent displacement to the displacement allowable position by frictional engagement with a locking member that has received a force that is displaced outward in the radial direction. provide.

  In this pipe joint device, the displacement prevention member at the displacement prevention position is prevented from being displaced to the displacement allowable position by frictional engagement with a locking member that has received a force that is displaced radially outward. Therefore, while the force that separates the male unit and the female unit is applied to the male unit and the female unit by the fluid pressure passed through the male and female pipe joints that are in fluid communication, Displacement of the member to the unlocked position is prevented, thus preventing separation of the male unit and the female unit.

  In this case, the pipe joint device is a spring member that applies a biasing force from the displacement prevention position to the displacement permissible position with respect to the displacement prevention member, and when the locking member does not receive the pulling force. The displacement prevention member may further include a spring member that is adapted to be displaced from the displacement prevention position to the displacement allowable position.

  Further, the other of the male unit and the female unit is configured to allow the displacement preventing member against the spring force of the spring member in a state where the connecting shaft is received in the shaft receiving portion. A piston cylinder device for displacing from the position to the displacement preventing position in the axial direction can be further provided.

  Specifically, the piston cylinder device engages with the displacement prevention member in a state where the coupling shaft is received by the shaft receiving portion and resists the spring force of the spring member. A push-out position that displaces from the displacement-permitted position to the displacement-prevented position, and a retracting position that allows the displacement-preventing member to displace to the displacement-permitted position by the biasing force of the spring member away from the displacement-preventing position. A piston rod that is displaceable in the axial direction can be provided.

In the above pipe joint device,
The locking shaft is engaged by the locking member at the locking position, and the locking member is provided on the distal end side of the connecting shaft adjacent to the locking member engaging surface. An annular engagement locking part having a larger diameter than the engagement surface,
When the connecting shaft is about to be pulled out from the shaft receiving portion, the annular engagement locking portion is engaged with the locking member to apply a force to the locking member to be displaced radially outward. be able to.

  Moreover, in the above pipe joint apparatus, it can be set as the split ring by which this locking member was divided | segmented into two or more by the circumferential direction.

Furthermore, in the above pipe joint device,
A spring-biased holding member that holds the locking member in the unlocked position;
When the displacement preventing member is displaced from the displacement permissible position to the displacement preventing position, the retaining member engages with the locking member held at the locking release position by the holding member and displaces the locking member to the locking position. It can also be made to do.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a pipe joint device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of a pipe joint coupling device according to an embodiment of the present invention, showing a state where a male unit and a female unit are separated. FIG. 2 is a plan view similar to that of the pipe joint device of FIG. 1, showing a state in which the male unit and the female unit are connected. FIG. 3 is a right end view of the female unit shown in FIG. FIG. 4 is a left end view of the male unit shown in FIG. FIG. 5 is a partial cross-sectional view taken along the line VV in FIG. 1, and a part thereof is omitted for the sake of clarity. FIG. 6 is a view similar to FIG. 5 and shows a state in which the connecting shaft of the male unit is inserted into the shaft receiving portion of the female unit. FIG. 7 is a view similar to FIG. 6, and in the state shown in FIG. 6, the piston rod of the piston cylinder device of the female unit is moved to the pushing position, and the displacement preventing member of the female unit is displaced from the displacement allowable position to the displacement preventing position. The state where the locking member is in the locking position is shown. FIG. 8 is a view similar to FIG. 7 and shows a state in which the piston rod is displaced from the state of FIG. 7 to the retracted position in a state where the pressurized fluid is passed through the pipe joint device.

  The pipe joint device 10 according to the illustrated embodiment includes a male unit 14 including a male pipe joint 12 and a female unit 18 including a female pipe joint 16 connected to the male pipe joint 12.

  Specifically, the male unit 14 includes a connecting shaft 22 at the center position (FIG. 4) of the support substrate 20, and the male pipe joint 12 is connected to the connecting shaft 22 on both sides of the connecting shaft 22. Two are provided in parallel and spaced apart, and parallel to the connecting shaft 22 on both sides of the connecting shaft 22 in a direction obliquely crossing the center of the line connecting the two male pipe joints 12. Thus, two guide holes 24 penetrating the support substrate 20 are provided. In the illustrated example, a hexagonal chamfer is formed at the tip of the male pipe joint 12. In addition, a fluid pipe (not shown) is connected to the right end of the male pipe joint 12 as viewed in the figure.

  The female unit 18 includes a first substrate 26 having the same size as the support substrate 20, and a second substrate 30 that is parallel to the first substrate 26 and fixed to the first substrate 26 by a connecting rod 28. A female unit frame 32 is provided. The first substrate 26 is provided with a shaft receiving hole 34 for receiving the connecting shaft 22, two female pipe joints 16, and two guide pins 36, and the two guide pins 36 are guided by the corresponding male unit 14. By inserting the male unit 14 and the female unit 18 close to each other by inserting into the hole 24, the connecting shaft 22 is inserted into the shaft receiving hole 34, and the two male pipe joints 12 correspond to the two females. It is made to be in the state shown in FIG. In the illustrated example, the connecting rod 28 is attached to the first substrate 26 at four locations indicated by a on the first substrate 26 as seen in FIG. Although not shown, a fluid pipe is connected to the left end of each female pipe joint 16.

  As shown in FIG. 5, the connecting shaft 22 of the male unit 14 is provided with a male screw, is fixed to the support substrate 20 by a nut 37 and protrudes toward the female unit 18. A step 22a that engages the surface of the first substrate 26 when inserted into the shaft receiving hole 34 of the unit 18, and an extension from the step 22a to be inserted into the shaft receiving portion 38 of the female unit 18 described later. An insertion portion 22b, and an annular locking member engaging surface 22c formed in the shape of a groove on the circumferential surface of the insertion portion 22b and the locking member engaging surface 22c. An annular engagement locking portion 22d formed on the distal end side is provided.

  On the other hand, the female unit frame 32 has a shaft receiving portion 38 for receiving the insertion portion 22b of the connecting shaft 22, and the shaft receiving portion 38 has the inserted portion 22b of the connecting shaft 22 received. The following locking device for locking (locking) in the shaft receiving portion 38 is provided. That is, the locking device is displaceable in the radial direction with respect to the received connecting shaft 22 and engages with the locking member engaging surface 22c of the received connecting shaft 22 so that the connecting shaft 22 receives the shaft. A locking position (FIGS. 7 and 8) for preventing the portion 38 from coming out, and the connecting shaft 22 coming out of the shaft receiving portion 38 by being displaced radially outward from the locking position (or within the shaft receiving portion 38). In the axial direction of the locking member 40 displaceable between the locking release position (FIGS. 5 and 6) and the insertion portion 22b of the connecting shaft 22 received in the shaft receiving portion 38. A cylindrical displacement prevention member 42 that is enabled and engages with the locking member 40 at a radially outer position of the locking member 40 in the locking position (FIGS. 7 and 8) so that the locking member 40 is radially outward. A displacement prevention position (FIGS. 7 and 8) that prevents the movement of the locking member 40, and displacement of the locking member 40 to the left in the axial direction from the displacement prevention position to allow the locking member 40 to be displaced to the locking release position (FIGS. 5 and 6). And a displacement prevention member 42 that is displaceable between the displacement allowable positions (FIGS. 5 and 6). In the illustrated example, the female unit frame 32 is provided with a piston cylinder device 44, specifically, an air cylinder, and the piston rod 46 of the piston cylinder device 44 is moved from the retracted position shown in FIGS. The displacement blocking member 42 is displaced from the displacement allowable position to the displacement blocking position by engaging with the displacement blocking member 42 and pushing it out to the pushing position shown in FIG. 7, and normally the piston rod 46 is held at the pushing position. Thus, the displacement preventing member 42 is maintained at the displacement preventing position, so that the connecting shaft 22 of the male unit 14 does not come out of the shaft receiving portion 38 of the female unit 18 and the male unit 14 and the female unit. 18 so that the piston rod 46 is displaced to the retracted position.

  The locking member 40 is a split ring that is preferably divided into four in the circumferential direction. The locking member 40a extends in the axial direction of the connecting shaft 22 inserted into the shaft receiving portion 38 and has a radius from the locking portion 40a. And a holding portion 40b extending outward in the direction, and is attached to be radially displaceable by a ring-shaped holding member 48 fixed inside the connecting rod 28. Specifically, the holding portion 40 b of the locking member 40 is inserted into an annular gap 49 formed between the holding member 48 and the first substrate 26 and is urged by a coil spring 50 provided in the holding member 48. The locking member 40 is held at the unlocking position shown in FIG. 5 by engaging the ball-like locking element 52 with the locking recess 40c provided on the surface of the holding part 40b, and the displacement preventing member When the piston 42 is displaced from the allowable displacement position shown in FIGS. 5 and 6 to the displacement prevention position shown in FIG. 7 by the piston cylinder device 44, the displacement prevention member 42 is displaced radially inward to the locking position. When the displacement preventing member 42 is displaced to the displacement allowable position and the connecting shaft 22 is pulled out from the shaft receiving portion 38, the annular engaging locking portion 22d of the connecting shaft 22 is pulled out. It is displaced radially outwardly is adapted to be returned to the locked release position. The holding member 48 is fixed in the female unit frame 32 by a fixing ring 54, and includes a cylindrical portion 48a extending to the left in parallel with the locking portion 40a of the locking member 40, and an outer peripheral surface 48b of the cylindrical portion 48a. 5 is biased toward the displacement allowable position shown in FIG. 5 by a coil spring 56 provided between the fixing ring 54 and the left end flange 42a of the displacement preventing member 42.

  The locking member 40 in the locking position (FIGS. 7 and 8) has a taper of the annular engagement locking portion 22d when the connecting shaft 22 receives a pulling force in the direction (rightward) of pulling out from the shaft receiving portion 38. The surface 22e is engaged with the tapered portion 40e at the distal end of the locking member 40 to apply a force to the locking member 40 to be displaced radially outward, and the outer surface 40d of the locking portion 40a of the locking member 40 is moved to the displacement preventing member 42. The inner peripheral surface 42b is pressed against the frictional force between the outer peripheral surface 40d and the inner peripheral surface 42b when the displacement preventing member 42 is about to be displaced in the axial direction toward the allowable displacement position. Is supposed to occur. Specifically, in the pipe joint device 10, when the male pipe joint 12 and the female pipe joint 16 are fluidly connected and fluid is passed, the fluid pressure causes the male unit 14 and the female unit 18 to be connected. The force that acts to pull them apart works. As long as the piston rod 46 of the piston cylinder device 44 is held in the push-out position, the displacement prevention member 42 is held in the displacement prevention position by engagement with the piston rod 46, thereby holding the locking member 40 in the locking position. As a result, the connecting shaft 22 does not come out of the shaft receiving portion 38 of the female unit 18, but even if the piston rod 46 is brought into the retracted position and moved away from the displacement preventing member 42 due to an erroneous operation or the like, the above-described fluid Due to the pulling force applied to the connecting shaft 22 by the pressure, a frictional force is generated between the outer surface 40d of the locking portion 40a of the locking member 40 and the inner peripheral surface 42b of the displacement preventing member 42, and the displacement preventing member 42 is Displacement from the displacement prevention position to the displacement allowable position is prevented. Therefore, in this pipe joint device 10, in the state where the fluid pressure is generated as described above, the locking member 40 is displaced to the locking release position, and the male unit 14 is separated from the female unit 18. It is possible to prevent a situation from occurring.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this. For example, the insertion portion 22 b of the connecting shaft 22 can be increased in diameter from the stepped portion 22 a toward the tip of the connecting shaft 22. In short, this portion only needs to be shaped so as to press the locking member 40 radially outward when a pulling force is applied to the connecting shaft 22. Moreover, although the displacement prevention member 42 showed what was displaced using the piston cylinder apparatus 44, it can also be made to displace manually by an operator. Further, in the illustrated example, the locking member 40 and the displacement preventing member 42 are engaged between the outer peripheral surface 40d of the locking member 40 and the inner peripheral surface 42b of the displacement preventing member 42 extending parallel to the outer peripheral surface 40d. However, for example, a protrusion may be provided on one surface to engage with the other surface. In short, what is necessary is just to make it the structure which hold | maintains the locking member 40 in a locking position, and the above-mentioned frictional force arises.

Pipe fitting device 10, male pipe fitting 12, male unit 14, female pipe fitting 16, female unit 18, support substrate 20, connecting shaft 22, step portion 22a, insertion portion 22b, locking member engaging surface 22c , Annular engagement locking part 22d, tapered surface 22e, guide hole 24, first substrate 26, connecting rod 28, second substrate 30, female unit frame 32, shaft receiving hole 34, guide pin 36, nut 37, shaft receiving Portion 38, locking member 40, locking portion 40a, holding portion 40b, locking recess 40c, outer surface 40d, taper portion 40e, displacement prevention member 42, left end flange 42a, inner peripheral surface 42b, piston cylinder device 44, piston rod 46, Holding member 48, cylindrical portion 48a, outer peripheral surface 48b, gap 49, coil spring 50, locking element 52, fixing ring 54, coil spring (spring member) 56

Claims (7)

A male unit having a male pipe joint and a female unit having a female pipe joint connected to the male pipe joint, the male unit and the female unit being relatively close to each other In the pipe joint device that connects the male pipe joint and the female pipe joint by:
A connecting shaft provided on one of the male unit and the female unit;
A shaft receiving portion that is provided on the other of the male unit and the female unit, and that receives the connecting shaft when the male fitting and the female fitting are connected;
Have
The shaft receiving part is
A locking position that is radially displaceable relative to the received connecting shaft and that engages the received connecting shaft to prevent the connecting shaft from coming out of the shaft receiving portion; A locking member that is displaceable between a locking release position that allows the connecting shaft to be displaced radially outward to allow the connecting shaft to come out of the shaft receiving portion;
The locking member is displaceable in the axial direction of the connecting shaft received in the shaft receiving portion, and engages with the locking member at a radially outer position of the locking member at the locking position so that the locking member moves radially outward. And a displacement prevention member that is displaceable between a displacement prevention position that prevents the locking and a displacement allowable position that displaces from the displacement prevention position and allows the locking member to be displaced to the locking release position. And
The locking member in the locking position is shaped to receive a force that is displaced outward in the radial direction by the connecting shaft when the connecting shaft receives a pulling force in a direction in which the connecting shaft is pulled out from the shaft receiving portion. And
The displacement prevention member in the displacement prevention position is prevented from being displaced to the displacement allowable position by frictional engagement with a locking member that has received a force that is displaced outward in the radial direction .
A spring member that applies a biasing force to the displacement prevention member from the displacement prevention position toward the displacement permissible position, wherein the displacement prevention member is prevented from being displaced when the locking member is not receiving the pulling force. A pipe joint device further comprising a spring member adapted to be displaced from a position to the displacement allowable position . When the other of the male unit and the female unit is in a state where the connecting shaft is received in the shaft receiving portion, the displacement preventing member is moved from the displacement allowable position against the biasing force of the spring member. The pipe joint device according to claim 1 , further comprising a piston cylinder device for displacing in the axial direction to the displacement preventing position. The piston cylinder device engages with the displacement preventing member in a state in which the connecting shaft is received in the shaft receiving portion, and the displacement preventing member resists the biasing force of the spring member. Between the push-out position that is displaced from the displacement prevention position to the displacement prevention position and the retracting position that allows the displacement prevention member to be displaced to the displacement allowable position by the biasing force of the spring member in the axial direction. The pipe joint device according to claim 2 , comprising a piston rod that is displaceable. The locking shaft is engaged by the locking member at the locking position, and the locking member is provided on the distal end side of the connecting shaft adjacent to the locking member engaging surface. An annular engagement locking part having a larger diameter than the engagement surface,
When the connecting shaft is about to be pulled out from the shaft receiving portion, the annular engagement locking portion engages with the locking member and applies a force to the locking member to displace radially outward. The pipe joint device according to any one of claims 1 to 3 . The pipe joint device according to any one of claims 1 to 4, wherein the locking member is a split ring divided into two or more in the circumferential direction. A spring-biased lock for holding the locking member in the unlocked position;
When the displacement preventing member is displaced from the displacement allowable position to the displacement preventing position, the locking member engages with the locking member held at the locking release position by the locking element and displaces the locking member to the locking position. The pipe joint device according to any one of claims 1 to 5 , wherein the pipe joint device is adapted to be made.   A male unit having a male pipe joint and a female unit having a female pipe joint connected to the male pipe joint, the male unit and the female unit being relatively close to each other In the pipe joint device that connects the male pipe joint and the female pipe joint by:
  A connecting shaft provided on one of the male unit and the female unit;
  A shaft receiving portion that is provided on the other of the male unit and the female unit, and that receives the connecting shaft when the male fitting and the female fitting are connected;
  Have
  The shaft receiving part is
  A locking position that is radially displaceable relative to the received connecting shaft and that engages the received connecting shaft to prevent the connecting shaft from coming out of the shaft receiving portion; A locking member that is displaceable between a locking release position that allows the connecting shaft to be displaced radially outward to allow the connecting shaft to come out of the shaft receiving portion;
  The locking member is displaceable in the axial direction of the connecting shaft received in the shaft receiving portion, and engages with the locking member at a radially outer position of the locking member at the locking position so that the locking member moves radially outward. And a displacement prevention member that is displaceable between a displacement prevention position that prevents the locking and a displacement allowable position that displaces from the displacement prevention position and allows the locking member to be displaced to the locking release position. And
  The locking member in the locking position is shaped to receive a force that is displaced outward in the radial direction by the connecting shaft when the connecting shaft receives a pulling force in a direction in which the connecting shaft is pulled out from the shaft receiving portion. ,
  The displacement prevention member in the displacement prevention position is prevented from being displaced to the displacement allowable position by frictional engagement with a locking member that has received a force that is displaced outward in the radial direction.
  A spring-biased lock for holding the locking member in the unlocked position;
  When the displacement preventing member is displaced from the displacement allowable position to the displacement preventing position, the locking member engages with the locking member held at the locking release position by the locking element and displaces the locking member to the locking position. Pipe fitting device that is designed to be

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