JP2017026131A - Coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent pressure fluid in a first joint from flowing out of it due to a certain cause even if the first joint and a second joint are spaced apart.SOLUTION: A coupling device of this invention comprises a first joint [5] and a second joint [6] removably connected from above to the first joint [5], and a first supply and discharging passage [7] in the first joint [5] and a second supply and discharging passage [8] in the second joint [6] are separably connected. A valve case [15] is inserted into the first joint [5] under a state in which it can be moved in a vertical direction and held in sealed manner. Driving means [D] arranged in the first joint [5] advances the valve case [15] toward an upper end side and retracts it toward a lower end side. A first valve member [25] is inserted into the valve case [15] in a movable manner in a vertical direction. A valve seat member [42] is arranged in the second joint [6]. A second cylindrical valve member [45] is inserted into a second casing [40] in a sealed and movable manner in a vertical direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coupling device that detachably connects supply and discharge paths formed in a first joint and a second joint.

Conventionally, this type of coupling apparatus is described in Patent Document 1 (Japanese Utility Model Registration No. 3179484). The prior art is configured as follows.
The first joint is provided on the clamp pallet on the fixed side, and the second joint is provided on the work pallet on the movable side. A valve case is inserted into the first casing of the first joint, and a first valve member is inserted into the valve case. The valve case and the first valve member are moved up and down by driving means provided in the first casing. A first valve mechanism is provided between the valve case and the first valve member, and the first valve mechanism opens and closes the first supply / discharge path in the first casing. Further, the second valve member is inserted into the second casing of the second joint. A second valve mechanism is provided between the second casing and the second valve member, and the second valve mechanism opens and closes the second supply / discharge path in the second casing. When connecting the first joint and the second joint, the valve case and the first valve member are raised by the driving means in a state where the first joint and the second joint are abutted. Then, the valve case is received by the second casing, and the first valve member retracts the second valve member into the second casing, and the first valve mechanism and the second valve mechanism are opened.

  Utility Model Registration No. 3179484

The above prior art has the following problems.
In a state where the first joint and the second joint are separated from each other, the valve case and the first valve member may be raised by a malfunction or erroneous operation of the drive means. At this time, the valve case is received by the first casing, the first valve member is separated from the valve case, and the first valve mechanism is opened. As a result, the pressure fluid in the first supply / discharge path flows out from the valve opening gap of the first valve mechanism.
An object of the present invention is a state in which the first joint and the second joint are separated from each other, and the pressure fluid in the first joint is caused by some cause (for example, the drive means malfunctions or misoperates). Is to provide a coupling device that does not flow out to the outside.

In order to achieve the above object, according to the first invention, for example, as shown in FIGS. 1 to 3, the coupling device is configured as follows.
The coupling device includes a first joint 5 and a second joint 6 that is detachably connected to the first joint 5 from the distal end side. The first supply / discharge passage 7 provided in the first joint 5 and the second supply / discharge passage 8 provided in the second joint 6 are detachably connected. The first joint 5 has a first casing 10, and a cylindrical valve case 15 is inserted in the first casing 10 so as to be movable in the axial direction and sealed. Driving means D provided in the first casing 10 advances the valve case 15 to the distal end side and retracts it to the proximal end side. A first valve seat 21 is provided at the tip of the valve case 15. A first valve member 25 is movably inserted into the valve case 15 in the axial direction. The first valve member 25 has a first valve surface 27 that comes into contact with the first valve seat 21 from the base end side. First biasing means 28 biases the first valve surface 27 toward the first valve seat 21. The second joint 6 has a second casing 40, and a valve seat member 42 is provided in the second casing 40. The valve seat member 42 has a second valve seat 43. A cylindrical second valve member 45 is inserted into the second casing 40 so as to be movable in the axial direction and in a sealed manner. The second valve member 45 has a second valve surface 46 that comes into contact with the second valve seat 43 from the distal end side. The second urging means 47 urges the second valve surface 46 toward the second valve seat 43.

The first invention has the following effects.
When connecting the first joint and the second joint, first, the second valve member of the second joint is brought into contact with the valve member of the first joint from the distal end side. Next, the drive means moves the second valve member back into the second casing through the valve case, and the valve seat member moves the first valve member to the proximal side with respect to the valve case. As a result, the second valve surface is opened away from the second valve seat, and the first valve surface is opened away from the first valve seat. As a result, the first supply / discharge path and the second supply / discharge path are connected.
When separating the first joint and the second joint, the driving means moves the valve case backward to the proximal end side. Then, the second urging means moves the second valve member toward the valve seat member, and the first urging means moves the first valve member toward the valve case. As a result, the second valve surface comes into contact with the second valve seat and closes, and the first valve surface comes into contact with the first valve seat and closes. As a result, the second supply / discharge path and the first supply / discharge path are separated.
In a state where the first joint and the second joint are separated from each other, the valve case may be moved to the distal end side due to some cause, for example, when the driving means malfunctions or is erroneously operated. Even in such a case, the first urging means brings the first valve body into contact with the first valve seat and the valve closed state is maintained. As a result, it is possible to prevent the fluid supplied to the first supply / discharge path from flowing out between the first valve body and the first valve seat.

The first invention preferably adds the following configuration.
(1) The driving means D includes a release spring 20. The release spring 20 is mounted in the first casing 10 and urges the valve case 15 toward the proximal end side.
In this case, the release spring reliably retracts the valve case to the proximal end side.

(2) The pressure receiving area A of the valve case 15 where the pressure of the pressure fluid in the first supply / discharge passage 7 acts in the distal direction is due to the contact between the valve case 15 and the second valve member 45. It is set larger than the pressure receiving area B inside the part to be sealed. The pressure receiving area C of the second valve member 45 where the pressure fluid of the second supply / discharge passage 8 acts in the proximal direction is set larger than the pressure receiving area B. Further, the pressure receiving area A is set larger than the pressure receiving area C.
In this case, since the pressure receiving area A is set to be larger than the pressure receiving area B, the pressure fluid supplied to the first supply / discharge path presses the first valve member toward the distal end side. Further, since the pressure receiving area C is set larger than the pressure receiving area B, the pressure fluid supplied to the second supply / discharge path presses the second valve member toward the base end side. Further, since the pressure receiving area A is set to be larger than the pressure receiving area C, the pressure fluid supplied to the first supply / discharge path and the second supply / discharge path pushes the first valve case toward the distal end side. The pressure fluid supplied to the first supply / discharge passage and the second supply / discharge passage becomes larger than the force pushing the second valve member toward the proximal end. As a result, the pressure fluid supplied to the first supply / discharge passage and the second supply / discharge passage reliably presses the sealing member of the second valve member toward the valve case.

In order to achieve the above object, in the second invention, for example, as shown in FIGS. 4A and 4B, a coupling device is configured as follows.
The coupling device includes a first joint 5 and a second joint 6 that is detachably connected to the first joint 5 from the distal end side. The first supply / discharge passage 7 provided in the first joint 5 and the second supply / discharge passage 8 provided in the second joint 6 are detachably connected. The first joint 5 has a first casing 10, and a cylindrical valve case 15 is inserted into the first casing 10 so as to be movable in the axial direction and in a tightly sealed manner. Driving means D provided in the first casing 10 advances the valve case 15 to the distal end side and retracts it to the proximal end side. A valve seat member 56 is provided in the valve case 15, and a first valve seat 21 is provided at a tip portion of the valve seat member 56. A first valve member 25 is inserted into the valve case 15 so as to be movable in the axial direction, and the first valve member 25 is brought into contact with the first valve seat 21 from the proximal end side. It has a valve surface 27. First biasing means 28 biases the first valve surface 27 toward the first valve seat 21. The second joint 6 has a second casing 40, and the second casing 40 is provided with a second valve seat 43. A cylindrical second valve member 45 is inserted in the second casing 40 so as to be axially movable and tightly inserted, and the cylindrical second valve member 45 is inserted into the second valve seat 43 from the front end side. It has the 2nd valve surface 46 to contact | abut. The second urging means 47 urges the second valve surface 46 toward the second valve seat 43.

The second invention has the following effects.
When connecting the first joint and the second joint, first, the second valve member of the second joint is brought into contact with the valve member of the first joint from the distal end side. Next, the driving means moves the first valve member to the proximal end side with respect to the valve case via the valve case, and the valve seat member moves the second valve member to the distal end side with respect to the second casing. . As a result, the first valve surface is opened away from the first valve seat, and the second valve surface is opened away from the second valve seat. As a result, the first supply / discharge path and the second supply / discharge path are connected.
When separating the first joint and the second joint, the drive means moves the valve case backward to the proximal end side. Then, the first urging means moves the first valve body toward the first valve seat and the second urging means moves the second valve body toward the second valve seat. As a result, the first valve surface comes into contact with the first valve seat and closes, and the second valve surface comes into contact with the second valve seat and closes. As a result, the second supply / discharge path and the first supply / discharge path are separated.
In a state where the first joint and the second joint are separated from each other, the valve case may be moved to the distal end side due to some cause, for example, when the driving means malfunctions or is erroneously operated. Even in such a case, the first urging means brings the first valve body into contact with the first valve seat and the valve closed state is maintained. As a result, it is possible to prevent the fluid supplied to the first supply / discharge path from flowing out between the first valve body and the first valve seat.

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention and showing a state in which a first joint and a second joint of a coupling device are separated. FIG. 2 is a cross-sectional view showing a state in which two joints are in contact with the first joint of the coupling device, and is a view similar to FIG. FIG. 3 is a cross-sectional view showing a state in which the first joint and the second joint of the coupling device are connected, and is a view similar to FIG. 1. 4A and 4B show a second embodiment of the present invention. FIG. 4A is a view similar to FIG. FIG. 4B is a view similar to FIG.

Embodiments of the present invention will be described below.
1 to 3 show a first embodiment of the present invention. First, the structure of a coupling device will be described with reference to FIG.

  A work pallet 2 that is a movable block is detachably mounted on the clamp pallet 1 that is a reference block from above. The coupling device of the present invention has a first joint 5 attached to the clamp pallet 1 and a second joint 6 attached to the work pallet 2. A first supply / discharge path 7 is formed in the first joint 5, and a second supply / discharge path 8 is formed in the second joint 6.

  The first casing 10 of the first joint 5 is fixed to the clamp pallet 1 with bolts. The first casing 10 includes an outer cylinder 11 and an inner cylinder 12 that is screwed into a lower portion of an inner peripheral hole of the outer cylinder 11. The inner cylinder 12 has a large-diameter portion 12a screwed into the outer cylinder 11 in a close-packed manner, and a small-diameter portion 12b provided on the upper side of the large-diameter portion 12a. A gap is formed between the small-diameter portion 12b and the inner peripheral hole of the outer cylinder 11, and the large-diameter portion 15a of the valve case 15 is inserted into the gap via the sealing member 12c so as to be movable in the up-down direction. The A small-diameter portion 15b protrudes above the large-diameter portion 15a. The valve case 15 is inserted by the drive means D so as to be movable in the vertical direction, and the drive means D is configured as follows.

  A lock chamber 16 is defined by the inner peripheral hole of the outer cylinder 11, the outer peripheral portion of the inner cylinder 12, and the large diameter portion 15 a of the valve case 15. The lock chamber 16 is connected to a pressure oil supply source (not shown) via a communication passage 17 formed in the outer cylinder 11 and a pressure oil (pressure fluid) supply / discharge passage 18 formed in the clamp pallet 1. It is connected. A release spring 20 is mounted between the upper surface of the large-diameter portion 15a of the valve case 15 and the protruding portion 10a that protrudes inward in the radial direction at the upper portion of the inner peripheral hole of the first casing 10. The The release spring 20 retracts the valve case 15 downward.

  A protruding portion 15c is projected from the upper end of the valve case 15 inward in the radial direction. The first valve seat 21 is formed on the inner peripheral wall of the protruding portion 15c so as to approach the axial center as it goes upward. A ring-shaped guide member 22 is fixed to the inner peripheral hole of the small diameter portion 15 b of the valve case 15 by a retaining ring 23. A small diameter portion 25a of the first valve member 25 is inserted into the inner peripheral hole of the guide member 22 so as to be movable in the vertical direction. A large-diameter portion 25 b is formed above the small-diameter portion 25 a of the first valve member 25. The outer peripheral wall of the large-diameter portion 25b is formed so as to approach the axial center as it goes upward, and has a groove 26 formed in the circumferential direction. A sealing member is mounted in the groove 26, and a first valve surface 27 is formed on the outer periphery of the sealing member.

  A first valve closing spring (first biasing means) 28 is mounted between the guide member 22 and the large-diameter portion 25a of the first valve member 25, and the first valve closing spring 28 is the first valve member. 25 is pressed toward the protruding portion 15 c of the valve case 15. Therefore, the first valve surface 27 is in contact with the first valve seat 21.

  The first supply / exhaust passage 7 is connected to the valve opening gap formed between the first valve seat 21 and the first valve surface 27, the inner peripheral hole of the valve case 15, and the communication formed in the guide member 22. The hole 29 and the first supply / discharge port 30 formed in the inner cylinder 12 are configured.

  The second casing 40 of the second joint 6 is fixed to the work pallet 2 with bolts. A mounting hole 41 is formed in the second casing 40, and a valve seat member 42 projects downward from the bottom wall of the mounting hole 41. A second valve seat 43 is formed in the circumferential direction below the valve seat member 42. A cylindrical second valve member 45 is inserted into the mounting hole 41 via a sealing member 45a so as to be movable in the up-down direction. A second valve surface 46 is formed in the circumferential direction below the second valve member 45, and the second valve surface 46 is in contact with the second valve seat 43 from above. A second valve closing spring (second urging means) 47 is mounted between the bottom wall of the mounting hole 41 and the second valve member 45, and the second valve closing spring 47 is the second valve member 45. Is biased toward the valve seat member 42. Therefore, the second valve surface 46 is in contact with the second valve seat 43 from above.

  The second supply / exhaust path 8 includes a valve opening gap formed between the second valve seat 43 and the second valve surface 46, a mounting hole 41, and a communication formed in the bottom wall of the mounting hole 41. The hole 49 and the second supply / discharge port 50 formed in the upper part of the second casing 40 are configured.

  A groove 51 is formed in the circumferential direction so as to open downward in the lower wall of the second valve member 45, and a sealing member 52 is mounted in the groove 51. Thus, when the valve case 15 is locked upward, the upper end surface of the valve case 15 comes into contact with the sealing member 52 (see FIG. 2).

As shown in FIG. 3, the pressure receiving area A of the valve case 15 where the pressure oil (pressure fluid) in the first supply / exhaust passage 7 acts upward corresponds to the valve case 15 and the second valve member 45. It is set larger than the pressure receiving area B inside the portion sealed by contact. For this reason, the pressure oil (pressure fluid) supplied to the first supply / discharge passage 7 presses the valve case upward.
Further, the pressure receiving area C of the second valve member 45 where the pressure of the pressure fluid in the second supply / discharge passage 8 acts downward is set larger than the sealing cross-sectional area B described above. For this reason, the pressure oil (pressure fluid) supplied to the second supply / discharge passage 8 presses the second valve member 45 downward.
The pressure receiving area A is set larger than the pressure receiving area C. For this reason, the force by which the pressure oil in the first supply / discharge passage 7 pushes the first valve case 15 upward is greater than the force by which the pressure oil in the second supply / discharge passage 8 pushes the second valve member 45 downward. As a result, the valve case 15 is reliably pressed toward the sealing member 52 of the second valve member 45.

The coupling device operates as follows, as shown in FIGS.
In the separated state of FIG. 1, the pressure oil is discharged from the lock chamber 16 of the first joint 5, and the release spring 20 moves the valve case 15 downward. Further, the first valve closing spring 28 moves the first valve member 25 upward.
In the second joint 6 described above, the second valve closing spring 47 moves the second valve member 45 downward.

When the work pallet 2 is switched from the separated state of FIG. 1 to the connected state of FIG. 3, first, the second joint 6 is moved above the first joint 5 as shown in FIG. Next, when the second joint 6 is moved downward, the sealing member 52 of the second valve member 45 comes into contact with the upper surface of the protruding portion 15 c of the valve case 15. Further, as shown in FIG. 2, the supported surface 40 a of the second joint 6 abuts on the support surface 10 b of the first joint 5.
Next, when pressure oil is supplied to the lock chamber 16, the valve case 15 moves upward against the release spring 20, and the valve case 15 resists the second valve member 45 against the second valve closing spring 47. And move it up. Next, the upper end portion of the valve case 15 is inserted into the accommodation hole 53 of the second joint 6, and the second valve surface 46 of the second valve member 45 is separated from the second valve seat 43 of the valve seat member 42. The valve is opened. At the same time, the upper surface of the large-diameter portion 25 b of the first valve member 25 is brought into contact with the lower surface of the valve seat member 42, so that the first valve surface 27 of the first valve member 25 becomes the first valve of the valve case 15. The valve is opened away from the seat 21. For this reason, the first supply / discharge passage 7 of the first joint 5 and the second supply / discharge passage 8 of the second joint 6 are communicated with each other.
Finally, as shown in FIG. 3, the valve case 15 is received by the bottom wall of the accommodation hole 53, and the first joint 5 and the second joint 6 are connected.

When the coupling device is switched from the connected state of FIG. 3 to the separated state of FIG. 1, first, when the pressure oil is discharged from the lock chamber 16, the release spring 20 moves the valve case 15 downward. Then, the second valve closing spring 47 moves the second valve member 45 downward, and the first valve closing spring 28 moves the first valve member 25 in the valve closing direction. As a result, the first valve surface 27 of the first valve member 25 abuts on the first valve seat 21 of the first casing 10 and is closed, and the second valve surface 46 of the second valve member 45 is the valve seat member. It abuts on the second valve seat 43 of 42 and closes.
Thereafter, when the work pallet 2 is carried upward from the state of FIG. 2, the second joint 6 is separated from the first joint 5 as shown in FIG. 1.

The first embodiment described above has the following advantages.
When the first joint 5 and the second joint 6 are separated from each other, the valve case 15 resists the release spring 20 due to some cause, for example, the drive means D malfunctions or is operated incorrectly. It may be moved upward. Even in such a case, the closed state in which the first valve surface 27 of the first valve member 25 is in contact with the first valve seat 21 of the valve case 15 by the first valve closing spring 28 is maintained. For this reason, it is possible to prevent the pressure oil supplied to the first supply / discharge passage 7 from flowing out between the first valve surface 27 and the first valve seat 21.

4A and 4B show a second embodiment of the present invention. In the second embodiment, the same members (or similar members) as the constituent members of the first embodiment will be described with the same reference numerals in principle.
The second embodiment is different from the first embodiment as follows.

  In the first joint 5, a mounting hole 55 is opened upward in the small diameter portion 15 b of the valve case 15, and a valve seat member 56 projects upward from the bottom wall of the mounting hole 55. A protruding portion 56a is formed on the outer peripheral portion of the valve seat member 56 so as to expand upward, and the first valve seat 21 is formed on a tapered outer peripheral portion of the protruding portion 56a. In addition, the cylindrical first valve member 25 is inserted in the mounting hole 55 so as to be movable in a vertical direction. The first valve surface 27 is formed on the inner peripheral wall of the protruding portion 15c so as to move away from the axis as it goes upward. A first valve closing spring 28 is mounted between the bottom wall of the mounting hole 55 and the first valve member 25, and the first valve closing spring 28 attaches the first valve member 25 toward the valve seat member 56. It is fast. Therefore, the first valve surface 27 is in contact with the first valve seat 21 and is closed.

  The first supply / exhaust passage 7 has a valve opening gap formed between the first valve seat 21 and the first valve surface 27, a mounting hole 55, and a communication formed in the bottom wall of the mounting hole 55. The hole 57 and the first supply / discharge port 30 formed in the inner peripheral hole of the inner cylinder 12 are configured.

  A groove 60 is formed at the upper end of the first valve member 25, and a sealing member 61 is mounted in the groove 60. When the valve case 15 is driven to lock upward, the driving means D moves the sealing member 61 of the first valve member 25 under the second casing 40 via the valve case 15 and the first valve closing spring 28. Abut on the end face.

  In the second joint 6, a protruding portion 40 b is projected inward in the radial direction at the lower end portion of the inner peripheral hole of the second casing 40, and the second valve seat 43 is directed downward on the inner peripheral wall of the protruding portion 40. It is formed to narrow. A ring-shaped guide member 65 is fixed by a retaining ring 66 at an intermediate height portion of the inner peripheral hole of the second casing 40. A small diameter portion 45a of the second valve member 45 is inserted into the inner peripheral hole of the guide member 65 so as to be movable in the vertical direction. A large-diameter portion 45b protrudes downward from the small-diameter portion 45a, and an outer peripheral portion of the large-diameter portion 45b is formed so as to be narrowed downward. A second valve surface 46 is formed on the outer peripheral portion of the large diameter portion 45b. A second valve closing spring 47 is mounted between the guide member 65 and the large diameter portion 45 b of the second valve member 45, and the second valve closing spring 47 connects the second valve member 45 to the protruding portion 40 b of the second casing 40. It is energizing towards. Therefore, the second valve surface 46 is in contact with the second valve seat 43 and is closed.

  The second supply / exhaust path 8 is formed in the vertical direction between the valve opening gap formed between the second valve seat 43 and the second valve surface 46, the inner peripheral hole of the second casing 40, and the guide member 65. The communication hole 49 is formed, and the second supply / exhaust port 50 is formed in the upper part of the second casing 40.

The coupling device operates as follows, as shown in FIGS. 4A to 4B.
4A, the pressure oil is discharged from the lock chamber 16 of the first joint 5, and the release spring 20 moves the valve case 15 downward. Further, the first valve closing spring 28 urges the first valve member 25 toward the protruding portion 56 a of the valve seat member 56. Thus, the first valve surface 27 is in contact with the first valve seat 21 and is closed.
The second valve closing spring 47 of the second joint 6 moves the second valve member 45 toward the protruding portion 40 b of the second casing 40. Thus, the second valve surface 46 is in contact with the second valve seat 43 and is closed.

When the coupling device is switched from the separated state shown in FIG. 4A to the connected state shown in FIG. 4B, the work pallet 2 is first moved above the clamp pallet 1 and then the work pallet 2 is moved from the separated state shown in FIG. 4A. Lower. Then, the sealing member 61 of the first valve member 25 comes into contact with the lower end surface of the second casing 40. Further, the supported surface 40 a of the second joint 6 abuts on the support surface 10 b of the first joint 5.
Next, when pressure oil is supplied to the lock chamber 16, the pressure oil in the lock chamber 16 moves the valve case 15 upward against the release spring 20. Then, the first valve member 25 is received by the second casing 40, and the valve seat member 56 is moved upward against the first valve closing spring 28. As a result, the first valve surface 27 is opened away from the first valve seat 21. Further, when the upper surface of the valve seat member 56 is brought into contact with the lower surface of the second valve member 45, the second valve member 45 is moved upward. As a result, the second valve surface 46 is opened away from the second valve seat 43. As a result, the first supply / discharge port 30 of the first joint 5 and the second supply / discharge port 50 of the second joint 6 communicate with each other.
Finally, as shown in FIG. 4B, the upper surface of the large-diameter portion 15 a of the valve case 15 is received from above by a step portion 11 a formed on the inner peripheral wall of the outer cylinder 11. Thereby, the 1st coupling 5 and the 2nd coupling 6 are connected.

When the coupling device is switched from the connected state of FIG. 4B to the separated state of FIG. 4A, first, when the pressure oil is discharged from the lock chamber 16, the release spring 20 moves the valve case 15 downward. Then, the second valve closing spring 47 moves the second valve member 45 downward, and the first valve closing spring 28 moves the first valve member 25 upward. As a result, the first valve surface 27 comes into contact with the first valve seat 21 and closes, and the second valve surface 46 comes into contact with the second valve seat 43 and closes.
Thereafter, when the work pallet 2 is carried upward, the first joint 5 and the second joint 6 are separated as shown in FIG.

The second embodiment has the following advantages.
When the first joint 5 and the second joint 6 are separated from each other, for some reason, for example, the drive means D malfunctions or malfunctions, the valve case 15 resists the release spring 20. It may be moved upward. Even in such a case, the first valve surface 27 of the first valve member 25 is brought into contact with the first valve seat 21 of the valve case 15 by the first valve closing spring 28 and the valve closed state is maintained. For this reason, it is possible to prevent the pressure oil supplied to the first supply / discharge passage 7 from flowing out between the first valve surface 27 and the first valve seat 21.

Each of the above embodiments can be modified as follows.
The arrangement direction of the first joint 5 and the second joint 6 is not limited to the vertical direction, and may be the horizontal direction, or may be a direction inclined with respect to the vertical direction.
The fluid supplied to and discharged from the supply and discharge passages 7 and 8 may be another liquid or a gas such as compressed air instead of the exemplified pressure oil.
The driving means D may mount a lock spring in the lock chamber 16 instead of mounting the release spring 20 in the first casing 10. Further, the driving means D may be a double-acting cylinder instead of the illustrated single-acting cylinder. Furthermore, the pressure fluid that drives the driving means D may be another liquid or a gas such as compressed air instead of the illustrated hydraulic pressure.
The biasing means may be a rubber or a gas spring instead of the illustrated valve closing springs 28 and 47.
Instead of being formed on the first casing 10, the support surface 10 b may be provided at another place such as the clamp pallet 1. Further, the supported surface 40 a may be provided in another place such as the work pallet 2 instead of being formed in the second casing 40.
In addition, it is needless to say that various modifications can be made within a range that can be assumed by those skilled in the art.

5: first joint, 6: second joint, 7: first supply / discharge path, 8: second supply / discharge path, 10: first casing, 15: valve case, 20: release spring, 21 first valve seat, 25: first valve member, 27: first valve surface, 28: first urging means (first valve closing spring), 40: second casing, 42: valve seat member, 43: second valve seat, 45: Second valve member, 46: second valve surface, 47: second urging means (second valve closing spring), 56: valve seat member, D: driving means.

Claims (4)

A first joint (5) and a second joint (6) detachably connected to the first joint (5) from the tip side are provided, and a first supply provided in the first joint (5) In the coupling device for detachably connecting the discharge passage (7) and the second supply / discharge passage (8) provided in the second joint (6),
The first joint (5) is a cylindrical valve case (15) which is movable in the axial direction in the first casing (10) and is inserted in a tightly sealed manner;
Drive means (D) provided in the first casing (10), wherein the valve case (15) is advanced to the distal end side and retracted to the proximal end side;
A first valve seat (21) provided at the tip of the valve case (15);
A first valve member (25), which is inserted into the valve case (15) so as to be movable in the axial direction, and is in contact with the first valve seat (21) from the base end side. A first valve member (25) having a surface (27);
First urging means (28) for urging the first valve surface (27) toward the first valve seat (21),
The second joint (6) is a valve seat member (42) provided in the second casing (40), the valve seat member (42) having the second valve seat (43),
A cylindrical second valve member (45) that is axially movable in the second casing (40) and is inserted in a close-packed manner, and contacts the second valve seat (43) from the tip side. A second valve member (45) having a second valve face (46) in contact therewith;
And a second urging means (47) for urging the second valve surface (46) toward the second valve seat (43). The coupling device of claim 1.
The driving means (D) includes a release spring (20),
The release spring (20) is mounted in the first casing (10), and the valve case (15) is urged toward the base end side. The coupling device according to claim 1 or 2,
The pressure receiving area (A) of the valve case (15) on which the pressure of the pressure fluid in the first supply / discharge path (7) acts in the distal direction is the valve case (15) and the second valve member (45). Is set to be larger than the pressure receiving area (B) inside the portion sealed by abutting,
The pressure receiving area (C) of the second valve member (45) on which the pressure of the pressurized fluid in the second supply / discharge passage (8) acts in the proximal direction is set larger than the sealing cross-sectional area (B). And
The coupling device, wherein the pressure receiving area (A) is set larger than the pressure receiving area (C). A first joint (5) and a second joint (6) detachably connected to the first joint (5) from the tip side are provided, and a first supply provided in the first joint (5) In the coupling device for detachably connecting the discharge passage (7) and the second supply / discharge passage (8) provided in the second joint (6),
The first joint (5) is a cylindrical valve case (15) which is movable in the axial direction in the first casing (10) and is inserted in a tightly sealed manner;
Drive means (D) provided in the first casing (10), wherein the valve case (15) is advanced to the distal end side and retracted to the proximal end side;
A valve seat member (56) provided in the valve case (15), the valve seat member (56) having a first valve seat (21) provided at a tip portion of the valve seat member (56); ,
A first valve member (25) inserted in the valve case (15) so as to be movable in the axial direction so as to move in an axial direction, and is in contact with the first valve seat (21) from the base end side. A first valve member (25) having one valve face (27);
First urging means (28) for urging the first valve surface (27) toward the first valve seat (21),
The second joint (6) includes a second valve seat (43) provided at a proximal end portion of the second casing (40),
A cylindrical second valve member (45) that is movable in the axial direction in the second casing (40) and is inserted in a close-packed manner, and comes into contact with the second valve seat (43) from the front end side. A second valve member (45) having a second valve face (46) to be
And a second urging means (47) for urging the second valve face (46) toward the second valve seat (43).

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