JP3173825U - Coupling device - Google Patents

Abstract

The present invention provides a coupling device capable of both reducing the size of the device and ensuring sealing performance.
In a coupling device (1) including a female joint (10) and a male joint (10) and capable of connecting / separating first and second fluid passages (4, 5), the female joint (10) has a first valve seat. 1 valve case 11, the 1st valve body 13 which has a 1st valve part, and the compression coil spring which urges | biases this 1st valve body 13 to the valve closing side, The male coupling 20 consists of the annular seal member 26 A second valve case 21 having a second valve seat, a second valve body 23 having a second valve portion, a compression coil spring 25 for urging the second valve body 23 toward the valve closing side, and a second valve case 21 And a compression coil spring 28 for urging the second valve case 21, and when the male joint 20 is separated from the female joint 10, the tip of the annular seal member 26 is provided. The part is formed at a position retracted to the valve closing side from the tip of the third valve case. That.
[Selection] Figure 4

Description

  The present invention relates to a coupling device including a female joint and a male joint that can connect and separate the first and second fluid passages formed in the first and second members, respectively.

  Conventionally, a first joint attached to a first member such as a mold or a work pallet and a second joint attached to a second member such as a mold fixing member of a molding machine or a base member of a machine tool are provided. In order to supply fluid (cooling water, pressurized fluid, etc.) from one of the first and second fluid passages in the first and second members to the other in a state where the first and second members are connected, A coupling device that can connect and separate the first and second fluid passages via the first and second joints when the first and second members are connected and disconnected in a predetermined positional relationship has been put into practical use. Yes.

  The coupling device of Patent Document 1 includes a male joint and a female joint, each of which has a valve body that can be opened and closed, and the male joint and the female joint are separated from each other. The valve body of the male joint and the female joint are closed, and the male joint and female joint are inserted into the female joint with the male joint and female joint being inserted into the female joint. The first and second fluid passages are connected by opening both valve bodies.

  In this coupling device, when the male joint and the female joint are connected, both joints are transferred from the separated state to the connected state through the contact state. The male joint side valve case is provided with an annular seal member at the distal end portion, and the distal end portion of the annular seal member is formed so as to protrude from the distal end portion of the male joint side valve case to the valve opening side (front end side) position. Thereby, when both joints are in contact, the annular seal member is in contact with the distal end of the female joint side valve case so as to surround the passage port (valve part), and the passage port of the male joint side valve case and the female joint side valve The passage opening of the case is connected in a liquid-tight and connectable state. Therefore, when the male joint side valve body is moved forward, the first and second fluid passages can be connected without causing fluid leakage from the connecting portion.

WO2008 / 146335

In the coupling device of Patent Document 1, since the male joint and the female joint are not projected outward from the first and second members, it is possible to reduce the conveyance space.
However, in the coupling device of Patent Document 1, in order to ensure the connection sealing performance between the two joints in the connected state, when both joints are in the separated state, the tip of the annular seal member is more than the tip of the male joint side valve case. Also, the annular seal member may be damaged due to interference with other members.

  An object of the present invention is to provide a coupling device that can achieve both the miniaturization of the device and the securing of sealing performance.

  The coupling device according to claim 1 includes a female joint attached to the first member and a male joint attached to the second member, and the first and second fluids respectively formed on the first and second members. In the coupling device capable of connecting / separating the passage, the female joint is attached to the front end portion of the first valve case having a first valve seat at the front end portion thereof, and to be movable forward / backward in the first valve case. A first valve body having a first valve portion that contacts the first valve seat from the inside; and first urging means for urging the first valve body toward the valve closing side, wherein the male joint has a tip portion A second valve case having a second valve seat made of a sealing member, and a second valve portion that is mounted in the second valve case so as to be movable forward and backward, and that abuts against the second valve seat from the outside at the tip portion. A second valve body, a second urging means for urging the second valve body toward the valve closing side, and the second valve case as a second A third valve case that is housed so as to be movable forward and backward in the same direction as the body moving direction; Means, and when the male joint is separated from the female joint, the distal end portion of the seal member is formed at a position retracted closer to the valve closing side than the distal end portion of the third valve case. It is a feature.

  The invention of claim 2 is the invention of claim 1, wherein the urging force of the third urging means is derived from the urging force of the second urging means and the fluid acting on the valve opening side with respect to the second valve case. It is characterized by being set smaller than the sum of the forces received.

According to the first aspect of the present invention, the amount of advancement of the second valve body with respect to the female joint is obtained by calculating the relative advancement amount of the second valve body with respect to the second valve case and the relative advancement amount of the second valve case with respect to the third valve case. It can be secured by the total amount of advance. When both joints are in the separated state, the tip of the seal member is formed at a position retracted further to the valve closing side than the tip of the third valve case, thereby reducing the size of the device and preventing damage to the seal member. be able to.
In addition, since the seal member can be brought into contact with the female joint in a state of surrounding the first valve portion using the advance movement of the second valve case in the stage before the male joint and the female joint are connected, The 1 valve portion and the second valve portion can be coupled in a liquid-tight and connectable state without forming the tip end portion of the seal member at the valve opening side position from the tip end portion of the second valve case, The sealing performance between the male joint and the female joint can be ensured.

  According to the second aspect of the present invention, since the compression operation of the third urging unit starts earlier than the compression operation of the second urging unit, the male member is connected by the seal member before the first and second fluid passages are connected. It is possible to reliably seal between the joint and the female joint.

It is sectional drawing of the female coupling of the coupling apparatus which concerns on this invention. It is sectional drawing of the male coupling of a coupling apparatus. It is sectional drawing of the opposing state of a male joint and a female joint. It is sectional drawing of the connection state of a male joint and a female joint.

Embodiments of the present invention will be described below with reference to the drawings.
This embodiment is an example when the present invention is applied to a mold and a horizontal injection molding machine for fixing the mold.

  In the coupling device of the present embodiment, a female joint is mounted on a mold (corresponding to a first member), and a male plate is a clamp plate (second member) that is a platen attachment member of a horizontal injection molding machine that fixes the mold. The first fluid passage in the die and the second fluid passage in the clamp plate are connected and separated when the die is fixed to and released from the clamp plate.

As shown in FIGS. 1 to 4, the coupling device 1 includes a female joint 10 attached to the mold 2 and a male joint 20 attached to the clamp plate 3.
As shown in FIGS. 3 and 4, in this embodiment, when the mold 2 is fixed to the clamp plate 3 with a predetermined positional relationship, the mold is interposed between the female joint 10 and the male joint 20. The first fluid passage 4 in 2 and the second fluid passage 5 in the clamp plate 11 can be connected and separated.

  Here, the fluid port of the second fluid passage 5 is formed in the clamp plate 3, and the fluid port and the fluid supply / discharge unit (not shown) are connected. After the fluid supply / discharge unit is controlled by a control device (not shown) and the fluid supply / discharge unit is driven in a state where the first and second fluid passages 4 and 5 are connected, the first fluid passage in the mold 2 is provided. 4 is supplied and discharged. For example, the fluid supply / discharge unit includes a cooling water supply / discharge unit. In this case, the cooling water is circulated and supplied into the mold 2. The combination of the mold 2 and the clamp plate 3 may be a combination of a fixed mold and a clamp plate for a fixed mold, or a combination of a movable mold and a clamp plate for a movable mold.

Next, each female joint 10 and male joint 20 will be described in detail.
In addition, about the female joint 10, the direction of the arrow A of FIG. 1 is demonstrated as a front end side, and about the male joint 20, the direction of the arrow B of FIG. 2 is demonstrated as a front end side.

  As shown in FIGS. 1 and 3, the female joint 10 is mounted in a first mounting hole 2 a having a circular cross section formed in the mold 2. The female joint 10 includes a first valve case 11 having a first valve seat 12 at a distal end portion thereof, and is attached to the inside of the first valve case 11 so as to be movable forward and backward. A first valve body 13 having a first valve portion 14 that abuts from the end side, and a first valve body 13 for biasing the first valve body 13 toward the valve closing side (front end side) with respect to the first valve case 11. A compression coil spring 15 or the like corresponding to the biasing means is provided.

  As shown in FIG. 1, the 1st valve case 11 has the cylinder part 11a and the front-end | tip recessed part 11b. The cylindrical part 11a is fitted into the first mounting hole 2a, and an annular seal 17 is attached to the outer peripheral part of the middle part of the cylindrical part 11a. In this state, the distal end portion of the cylindrical portion 11a is located on the same plane as the distal end portion of the first mounting hole 2a, and the distal end concave portion 11b is slightly recessed from the distal end portion of the cylindrical portion 11a to the proximal end side. .

  A passage portion 4 a is formed inside the first valve case 11, and a passage port 11 c that connects the passage portion 4 a and the outside is formed at the distal end portion of the first valve case 11. At the distal end of the first valve case 11, a tapered inner peripheral surface is formed on the proximal end side of the passage port 11 c and the diameter decreases toward the distal end side, and a first valve seat 12 is formed on the tapered inner peripheral surface.

  The first valve body 13 is formed concentrically with the first valve case 11, and includes a shaft-shaped portion 13a, a large-diameter head portion 13b, a middle head portion 13c, and a distal head portion 13d in order from the proximal end side to the distal end side. is doing. An annular seal 16 is attached to the outer peripheral portion of the proximal end portion of the distal end head portion 13 d of the first valve body 13, and the annular seal 16 forms the first valve portion 14.

  An annular member 18 is fitted into the proximal end portion inside the first valve case 11, and a stop ring 19 is attached to the inner surface of the proximal end portion of the first valve case 11, and the annular member 18 is attached to the stop ring 19. It is locked so that it cannot move to the base end side. A cylindrical portion 18a extending toward the distal end is formed at the radial center of the annular member 18, and the shaft-shaped portion 13a of the first valve body 13 is slidably guided by the cylindrical portion 18a. A plurality of passage portions 18 b that connect the passage portion 4 a and the first fluid passage 4 are formed in the base end side portion of the annular member 18.

  The compression coil spring 15 is externally mounted on the shaft-like portion 13 a of the first valve body 13 between the large-diameter head portion 13 b and the annular member 18. When the first valve body 13 is in the closed state, the annular seal 16 and the first valve seat 12 come into contact with each other, and the distal end portion of the distal head portion 13d of the first valve body 13 is connected to the passage opening 11c of the first valve case 11. The distal end surface of the distal end head portion 13d and the distal end surface of the distal end recessed portion 11b are substantially continuously located on the same plane.

As shown in FIGS. 2 and 3, the male joint 20 is mounted in a second mounting hole 3 a having a circular cross section formed in the clamp plate 3 at a side portion of the clamp plate 3.
As shown in FIG. 2, the male joint 20 includes a second valve case 21 having a second valve seat 22 at the tip portion, a second valve case 21 movably mounted in the second valve case 21, and a second valve at the tip portion. A second valve body 23 having a second valve portion 24 that abuts the seat 22 from the outside (front end side), and urges the second valve body 23 toward the valve closing side (base end side) with respect to the second valve case 21. A compression coil spring 25 corresponding to a second urging means, a third valve case 27 for accommodating the second valve case 21 so as to move forward and backward in the same direction as the movement direction of the second valve body 23, and the third A compression coil spring 28 corresponding to third biasing means for biasing the second valve case 21 in the same direction as the compression coil spring 25 with respect to the valve case 27 is provided.

  The second valve case 21 is formed with a cylinder part 21a, a tip cylinder part 21b formed in a smaller diameter cylinder than the cylinder part 21a, and an annular recess 21c projecting radially inward of the tip cylinder part 21b. Has been. Annular seals 29a and 29b are attached to the outer peripheral portions of the distal end portion and the proximal end portion of the cylindrical portion 21a. A passage portion 5a is formed inside the second valve case 21, and a passage opening 21d that connects the passage portion 5a and the outside is formed inside the annular recess 21c.

  A passage portion 21 e for communicating the passage portion 5 a with the second fluid passage 5 is formed between the annular seals 29 a and 29 b on the outer peripheral portion of the second valve case 21, and is formed on the inner peripheral portion of the second valve case 21. Is formed with a stepped portion 21f projecting radially inward from the proximal end portion of the passage portion 21e. An annular seal member 26 is attached to the tip side of the annular recess 21c. The annular seal member 26 forms the second valve seat 22 and is configured to abut on the tip recess 11b of the first valve case 11 of the female joint 10 so as to surround the passage opening 11c.

The second valve body 23 has a piston portion 23a, a shaft base portion 23b, a shaft-shaped portion 23c, and a valve portion forming portion 23d in order from the proximal end side to the distal end side. As shown in FIG. 2, when the male joint 20 and the female joint 10 are in a separated state, the tip of the piston portion 23a is disposed at a position retracted from the step portion 21f by a distance α to the base end side. The diameter of the valve portion forming portion 23d increases toward the tip end side, and the second valve portion 24 is formed on the outer peripheral surface thereof. An annular seal 30 is attached to the outer peripheral portion of the piston portion 23 a, and this piston portion 23 a is slidably fitted inside the second valve case 21.
Stop rings 31a and 31b are mounted on the peripheral surface portion of the base end portion of the second valve case 21, and the second valve body 23 is locked to the base end side so as not to move by the stop rings 31a and 31b.

  The compression coil spring 25 is externally mounted on the shaft base portion 23 b and the shaft-shaped portion 23 c of the second valve body 23 between the piston portion 23 a of the second valve body 23 and the annular recess 21 c of the second valve case 21. When the second valve body 23 is in a closed state, the annular seal member 26 and the second valve portion 24 abut on the distal end side of the passage port 21d, and the distal end surface of the distal end tubular portion 21b and the valve portion forming portion 23d The tip surface is located on the same surface.

  The third valve case 27 includes a cylindrical portion 27a, an annular portion 27b bulging radially inward from the distal end of the cylindrical portion 27a, and a protruding portion 27c extending radially inward from the distal end portion of the annular portion 27b. Is formed. As shown in FIG. 2, the second valve case 21 is slidably accommodated inside the third valve case 27, and when the male joint 20 and the female joint 10 are in a separated state, the cylinder of the second valve case 21 The distal end of the portion 21a is located at a position retracted from the proximal end of the annular portion 27b to the proximal end side by a distance β. The cylindrical portion 27a and the annular portion 27b are fitted into the second mounting hole 3a, and annular seals 32a and 32b are attached to the outer peripheral portions of the distal end portion and the proximal end portion of the cylindrical portion 27a.

A passage portion 27c for communicating the passage portion 5a with the second fluid passage 5 through the passage portion 21e is formed between the annular seals 32a and 32b on the outer peripheral portion of the third valve case 2 7.
As shown in FIGS. 3 and 4, the distal end portion of the annular portion 27 b is slightly recessed from the distal end portion of the second mounting hole 3 a toward the proximal end side, and the distal end portion of the distal end cylindrical portion 21 b is the distal end of the annular portion 27 b. Slightly recessed from the portion to the base end side.

  The compression coil spring 28 is externally attached to the distal end cylindrical portion 21b between the distal end of the cylindrical portion 21a of the second valve case 21 and the base end of the overhang portion 27c of the third valve case 2 7. The biasing force of the compression coil spring 28 is set smaller than the sum of the biasing force of the compression coil spring 25 and the force received from the fluid acting on the second valve case 21 toward the valve opening side. After the operation is completed, the compression operation of the compression coil spring 25 is started.

  In this coupling device 1, as shown in FIG. 3, the tip end of the mold 2 and the tip end of the clamp plate 3 are in contact with each other (the tip ends of the first and third valve cases 11 and 27 are slightly in contact with each other). As shown in FIG. 4, the second valve case 21 is driven to advance with respect to the third valve case 27 in the male joint 20 and the second valve body 23 is moved to the second valve case. The first and second valve bodies 13 and 23 are collectively driven to the valve opening side by being driven forward with respect to 21. The valve body driving means includes the piston portion 23a provided integrally with the second valve body 23 of each male joint 20, and a fluid pressure that applies fluid pressure (for example, air pressure or hydraulic pressure) to the piston portion 23a. The working chamber 3b and a fluid pressure supply unit (not shown) for supplying fluid pressure to the fluid pressure working chamber 3b via the fluid pressure passage 6 are configured.

The operation and effect of the present coupling device 1 will be described.
First, in a state where the mold 2 is not fixed to the clamp plate 3, each female joint 10 and the male joint 20 are separated, and the first and second valve bodies 13, 23 are closed. Next, the mold 2 is transported to fix it to the clamp plate 3. At this time, the female joint 10 and the male joint 20 do not protrude from the surfaces of the mold and the clamp plate 3. In the case of parallel movement with respect to the fixed surface 3, the mold 2 and the clamp plate 3 can be brought into contact with each other.

  As shown in FIG. 3, in order to fix the mold 2 to the clamp plate 3 in a predetermined positional relationship, the mold 2 is fixed to the clamp plate 3 with each female joint 10 and the male joint 20 facing each other. When moving, the surfaces of the mold 2 and the clamp plate 3 come into contact with each other. At this time, the tip portions of the first and third valve cases 11 and 27 are disposed in a slightly opposed state, and the mold 2 is fixed to the clamp plate 3 in this state.

  Next, the fluid pressure is supplied from the fluid pressure supply unit to the fluid pressure working chamber 3b, and the fluid pressure acts on the base end surface of the piston portion 23a. At this time, the urging force of the compression coil spring 28 is set smaller than the sum of the urging force of the compression coil spring 25 and the force received from the fluid acting on the second valve case 21 toward the valve opening side. The compression operation of the compression coil spring 28 is started prior to the compression operation 25, and the second valve case 21 is driven forward against the urging force of the compression coil spring 28. As a result, the annular seal member 26 surrounds and abuts the passage opening 11c on the distal end portion of the distal end recess 11b. 21d can be connected in a sealed state.

  When the second valve case 21 is driven forward by a distance β with respect to the third valve case 27, the distal end of the cylindrical portion 21a comes into contact with the proximal end of the annular portion 27b, and the compression operation of the compression coil spring 28 is completed and the compression is performed. The compression operation of the coil spring 25 starts. When the second valve body 23 is driven to advance, the distal end surface of the valve portion forming portion 23d is connected to the distal end surface of the distal end head portion 13d, so that the first valve body 13 and the second valve body 23 are integrated with each other. Open the valve. As shown in FIG. 4, when the second valve body 23 is driven forward by a distance α with respect to the second valve case 21, the tip of the piston portion 23 a comes into contact with the base end of the step portion 21 f and the compression coil spring 25 is compressed. The operation ends.

  Thus, the female joint 10 and the male joint 20 are connected, and the first and second fluid passages 4 and 5 are connected to the passage portion 18b and the passage port 11c of the female joint 10 and the passage portions 21e and 27c and the passage port of the male joint 20. In this state, fluid can be supplied to and discharged from the fluid supply / discharge unit to the first fluid passage 4 in the mold 2. When the fluid pressure is discharged from each fluid pressure working chamber 3b, the second valve case 21, the second valve body 23, and the first valve body 13 are restored by the compression coil springs 28, 25, and 15, and the first and second The valve bodies 13 and 23 are closed, and in this state, the mold 2 can be released from the clamp plate 3.

  According to this coupling device 1, the amount of advancement of the second valve body 23 with respect to the female joint 10 is set such that the relative advancement amount of the second valve body 23 with respect to the second valve case 21 and the second valve case 21 with respect to the third valve case 27. Can be secured by the total amount of advance. Further, when both the joints 10 and 20 are in the separated state, the tip of the annular seal member 26 is formed at a position retracted from the tip of the third valve case 27 toward the valve closing side. Further, damage to the annular seal member 26 can be prevented. In addition, before the male joint 20 and the female joint 10 are connected, the annular seal member 26 is brought into contact with the female joint 10 in a state of surrounding the first valve portion 14 by using the advance movement of the second valve case 21. Since the first valve portion 14 and the second valve portion 24 can be connected in a liquid-tight and connectable state, the distal end portion of the annular seal member 26 can be connected to the distal end portion of the second valve case 21. In addition, the sealing performance between the male joint 20 and the female joint 10 can be ensured without protruding from the valve opening side position.

  The biasing force of the compression coil spring 28 is set smaller than the sum of the biasing force of the compression coil spring 25 and the force received from the fluid acting on the second valve case 21 toward the valve opening side. The operation can be started earlier than the compression operation of the compression coil spring 25, and the male joint 20 and the female joint 10 are reliably sealed by the annular seal member 26 before the first and second fluid passages 4 and 5 are connected. be able to.

In the present embodiment, the example of the coupling device 1 including the female joint 10 attached to the mold 2 and the male joint 20 attached to the clamp plate 3 has been described, but when the clamp plate 3 is omitted, Both joints 10 and 20 can be mounted on a mold and a platen. Further, the joints 10 and 20 are not limited to the above, and may be mounted on an arbitrary block body.
It should be noted that those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications.

  The present invention provides a coupling device having a female joint and a male joint that can connect / separate the first and second fluid passages formed in the first and second members, respectively. It is formed by the relative advancement amount of the second valve body with respect to the second valve case and the relative advancement amount of the second valve case with respect to the third valve case, and the annular seal member is formed on the female joint using the advancement movement of the second valve case. By abutting, it is possible to achieve both miniaturization of the apparatus and securing of sealing performance.

DESCRIPTION OF SYMBOLS 1 Coupling apparatus 2 Mold 3 Clamp plate 10 Female joint 11 1st valve case 12 1st valve seat 13 1st valve body 14 1st valve part 15 Compression coil spring (1st biasing means)
20 male joint 21 second valve case 22 second valve seat 23 second valve body 24 second valve portion 25 compression coil spring (second urging means)
26 annular seal member 27 third valve case 28 compression coil spring (third biasing means)

Claims (2)

A coupling having a female joint attached to the first member and a male joint attached to the second member and capable of connecting and separating the first and second fluid passages formed in the first and second members, respectively. In the device
The female joint includes a first valve case having a first valve seat at a tip portion, and a first valve that is mounted in the first valve case so as to be movable forward and backward, and abuts against the first valve seat from the inside at the tip portion. And a first urging means for urging the first valve body toward the valve closing side,
The male joint has a second valve case having a second valve seat made of a seal member at a tip end portion, and is attached to the inside of the second valve case so as to be movable forward and backward. A second valve body having a second valve portion in contact therewith, a second urging means for urging the second valve body toward the valve closing side, and the second valve case in the same direction as the moving direction of the second valve body. A third valve case that is housed to move forward and backward, and a third urging means that urges the second valve case in the same direction as the second urging means with respect to the third valve case,
The coupling is characterized in that when the male joint is separated from the female joint, the distal end portion of the seal member is formed at a position retracted to the valve closing side from the distal end portion of the third valve case. apparatus. The urging force of the third urging means is set to be smaller than the sum of the urging force of the second urging means and the force received from the fluid acting on the second valve case toward the valve opening side. The coupling device according to claim 1.