JPH0727062Y2 - Workpiece fixture fluid supply structure - Google Patents

Description

[Detailed description of the device] [Industrial applications]

This invention provides a fluid receiving portion connected to an actuator or the like provided on a work attachment such as a machine tool with a pallet change mechanism for restraining a work so as to intermittently supply a working fluid, and the fluid receiving portion. The present invention relates to a fluid supply structure for a workpiece fixture, the fluid supply structure comprising a fluid feed portion that is detachably connected to the fluid supply portion and supplies a working fluid from a fluid source.

[Prior art]

Conventionally, bolts or the like have been used to clamp a workpiece on a workpiece fixture installed on a pallet of a machine tool with a pallet change mechanism. However, in the case where a workpiece is clamped on the workpiece fixture in combination with a material handling robot or the like, automation has also been required on the workpiece fixture side. For this reason, hydraulic pressure has come to be used also for the clamp mechanism, but in order to change the pallet of the workpiece fixture and pull it into the machine tool, it is necessary to temporarily disconnect the hydraulic pressure source from the outside. The following various configurations are adopted, but all have a problem. That is, when a hydraulic system is used, in the oil passages such as cylinders, sequence valves, accumulators, and pilot check valves, the internal pressure is cut off by opening and closing the solenoid valve, so the oil passages are not mechanically interrupted and unmanned. To be dangerous. Further, there are drawbacks such that the occurrence rate of dust bites and leakage of the pilot check valve is high and reliability is low, and it is troublesome to repair because it cannot be operated from the outside. The work attachment shown in Japanese Patent Application No. 59-203 has a structure in which hydraulic pressure is supplied to an actuator or a pressure accumulator by connecting couplers, and a stop valve is provided to each of a plurality of couplers on the work attachment side. There is disclosed a configuration in which each stop valve is installed and controlled in series by operating a switching rod to disconnect and communicate with a hydraulic power source. However, in the above configuration, since the stop valves are independent from each other, it is not possible to uniformly attach the couplers or connect with the switching rods, and since the independent couplers are connected on the stop valves, the shape becomes large. I will end up. Further, there is a problem that it becomes difficult to align the pair of couplers when they are aligned.

[Problems to be solved by the device]

This invention was created as a result of earnest research to solve the above problems all at once, and its main problem is to make a plurality of holes penetrating the respective bases of the fluid receiving part and the fluid sending part. A coupler component is provided in each hole to make it smaller and easier to position, and the on-off valve provided in the hole on the fluid receiving portion side is mechanically operated by an operation lever provided outside to unmanned. (EN) Provided is a fluid supply structure for a work fixture with improved reliability.

[Means for solving problems]

In order to solve the above problems, in the invention of claim 1, a fluid receiver connected to an actuator for restraining a workpiece, which is provided in a workpiece fixture for conveying a predetermined path, is intermittently supplied with an operating fluid. In a fluid supply structure of a workpiece fixture, the fluid receiving section is connected to the actuator, and the fluid receiving section is detachably connected to the fluid receiving section and supplies a working fluid from a fluid source. A plurality of through holes, which are respectively connected to a plurality of flow paths, are provided in the receiving part base, and one tubular coupler forming portion having a tip facing outward is connected to the tip side of each through hole so that they can communicate with each other. In addition, an on-off valve is provided in each through-hole, and the valve rod of each on-off valve is linked to an operation lever formed on the outside of the receiving base so that the fluid can be intermittently connected. When connected to multiple flow paths branched from the source, A communicating hole facing the through hole is provided in the sending part base, and the tip end side of the communicating hole corresponds to one of the coupler constituent parts provided in the receiving part base on the coaxial line and communicates at the time of fitting. In addition to providing the other tubular coupler forming part, the sending part base has an engaging part that engages with the receiving part base and an advancing / retreating means for advancing / retreating the engaging part. The engaging portion is locked to a receiving portion base of a certain fluid receiving portion, and the forward / backward moving means pulls the coupler forming portion on the receiving portion base side into the coupler forming portion on the sending portion base side for connection. I am taking the technical means of. Further, in the invention of claim 2, the fluid receiving portion is provided with a plurality of through-holes respectively connected to the plurality of flow paths connected to the actuator, and the tip of each through-hole has an outer end. An operating lever in which one of the tubular couplers arranged in the opposite direction is connected so that they can communicate with each other, and an opening / closing valve is provided in each through hole and the valve rod of each opening / closing valve is formed outside the receiving part base. A fluid feed part that is connected to each of a plurality of flow paths branched from a fluid source and has a communication hole facing the through hole in the feed part base. At the tip end side of the communication hole, there is provided another coupler configuration portion of a detachable tube which corresponds to one coupler configuration portion provided on the receiving portion base on the coaxial line and communicates with each other at the time of fitting. The base is equipped with a fluid pressure cylinder that controls the operating lever. A through hole communicating with the coupler forming section is directly connected to the fluid pressure cylinder without an opening / closing valve, and a through hole communicating with another coupler forming section has an opening / closing valve and each valve rod is opened by the operation lever. The fluid sent at the time of connection between the coupler forming part on the fluid sending part side and the coupler forming part on the fluid receiving part side is supplied to the fluid pressure cylinder to enable the operation lever to be operated. I am taking the technical means of.

According to the first aspect of the present invention, the fluid receiving portion and the fluid feeding portion approach each other, and the other one provided on the feeding portion base on the same axis as one coupler forming portion provided on the receiving portion base. When the coupler components of (1) are fitted and connected, the tubular coupler components communicate with each other. As a result, the fluid sent from the fluid source passes from the branched flow path through the communication hole of the sending part base, is guided to the through hole of the receiving part base through the fitted and communicating coupler structure part, and further flows through the flow path. As it is supplied to the actuator via the actuator, the actuator can be operated and the workpiece can be restrained by the workpiece fixture. In addition, an opening / closing valve is provided in each through hole, and each valve rod can be simultaneously operated to open / close each opening / closing valve by the operation of the operation lever provided on the outside. The supply of can be intermittent. Further, after the workpiece is restrained by the workpiece fixture, the fluid receiving portion and the fluid sending portion are separated from each other and the coupler component is disengaged, so that the workpiece fixture is conveyed to the machine tool side along a predetermined path. be able to. Further, for the fluid receiving portion at the approaching position, the engaging portion is locked to the receiving portion base and pulled by the advancing / retreating means to fit the coupler forming portion on the receiving portion base side into the coupler forming portion on the sending portion base side. Can be connected with. According to the second aspect of the present invention, the fluid sent at the time of connecting the coupler forming section on the fluid sending side and the coupler forming section on the fluid receiving side is supplied to the fluid pressure cylinder, and the operation lever is controlled by the fluid pressure cylinder. be able to.

【Example】

A preferred embodiment in which the working fluid of the present invention is hydraulic will be described below with reference to the drawings. The hydraulic pressure supply structure of the work fixture of the present invention is provided in the machine tool with the pallet change mechanism. In the case of the first reference example shown in FIGS. 1 and 2, it is installed in the pallet P (see FIG. 5). Hydraulic receiving part 2 as an example of a fluid receiving part provided on the workpiece mounting tool A, and a hydraulic pump (not shown) fixed at a position near the end point of the transfer pulled out by the pallet change. ) And a hydraulic pressure feed unit 1 as an example of a fluid feed unit. That is, the hydraulic feed unit 1 holds a feed unit base 1'consisting of a substantially rectangular manifold through a support base,
A fixing hole 3 for bolting to the supporting base is provided on the upper part of the feeding unit base 1 ', and communication holes 4 opening on each surface or three surfaces are provided at equal intervals in the longitudinal direction. A screw is formed on the opening side of the communication hole 4, and an unused opening is closed by a blind plug or the like. In the case of this embodiment, this communication hole 4 is formed as shown in FIG.
The tip (right side in the figure) side is set to a large diameter to form the coupler mounting portion 5 in which a screw is engraved on the peripheral surface, and the midway portion is made small in diameter and the base end (left side in the figure) side is made slightly large in diameter. At the same time, a screw is engraved on the peripheral surface to provide a connecting portion 4'for the pipe of the oil passage branched from the hydraulic pressure source. In the illustrated example, the coupler forming portion attached to the communication hole 4 is formed of a tubular female coupler 6, and the threaded portion at the base end thereof is screwed onto the coupler attaching portion 5 via an O-ring 7. Has been done. In addition, the female coupler 6 is provided on both ends of the feed unit base 1 '.
A guide rod 9 projecting in the same direction as is screwed into the mounting hole 8. This guide lot 9 has an insertion portion 10 that is hardened and has a tapered surface at its tip, a large-diameter stopper collar protrudes in the middle, and is attached to the feeding portion base 1'on the mounting side. Is screwed into the mounting hole 8. The length of the tip of the guide rod 9 is set to a length that can be inserted into the insertion hole 16 of the hydraulic pressure receiving portion before the female coupler 6 is fitted and connected to the male coupler described later. , Is a guide means for positioning for coupling the coupler. Also, an air blow torch is provided on the upper surface side of the feed unit base 1 '.
11 is fixed. The air blow torch 11 has a plurality of injection nozzles 12 protruding in the same direction corresponding to the female coupler 6 connected to the front surface of a base pipe 11 ', and connected to an air pump side (not shown) on the back surface side. An air supply port 13 for supplying air to the injection nozzle 12 is provided. Fixing plates 14 extending in the extending direction are connected to both side ends of the base pipe 11 ', and bolts 15 are inserted into the holes to fix the air blow torch 11 to the feed unit base 1'. There is. A hydraulic pressure receiving portion 2 provided on a workpiece mounting tool that approaches the hydraulic pressure feeding portion 1 by a pallet P and faces the hydraulic pressure feeding portion 1.
Has a receiving part base 2'made of a substantially rectangular manifold and an operation lever 31 above which a hydraulic pressure is interrupted. That is, the receiving portion base 2'is provided with a through hole 20 penetrating forward and backward so as to face the communicating hole 4 of the sending portion base 1'and have the same center line. As shown in FIG. 2, the through hole 20 forms a valve chamber 18 in the center of which a ball valve 19 shown as an example of an on-off valve is built. In the valve chamber 18, a ball 24 having a flow path is held in a ball valve seat 25, and a lid body that closes an opening on the back side of the through hole 20.
It is fixed by 26. The lid 26 is provided with a pipe connection hole 27 so that the workpiece W
A pipe as an oil passage connected to an actuator or a pressure accumulator for clamping is connected to the through hole 20 so as to be able to communicate therewith. Further, a valve rod 28 for rotating the ball 24 is projected above each ball 24, and the base end of the lever receiving piece 30 is fixed to a square rod 29 connected to this, and the lever receiving piece 30 is fixed. Each tip is pivotally attached via a pin 32 to a single operating lever 31 extending in series along the longitudinal direction of the receiving base 2 '. Therefore, each lever receiving piece 30 is pivoted by the reciprocating motion of the operation lever 31, and the valve rod 28 is rotated through the square rod 29, so that the ball 24 can be rotated. As a result, each ball valve 19 can open and close the through hole 20 in synchronism to interrupt the supply of hydraulic pressure to each actuator or accumulator. Then, an annular step portion is formed in a hole portion which communicates with the valve chamber 18 and goes to the hydraulic feed portion 1 side, and the proximal end flange portion of the male coupler 6'is fitted thereinto so as to be aligned with the annular step portion. A holding plate 22 having an annular step portion 23 for restraining the end flange portion and having a through hole for allowing the tip of the male coupler 6'to project is fixed to the receiving portion base 2'from the front side and the male coupler 6 '. Is fixed to the receiving base 2'so that it can communicate with the through hole 20. The fixing structure is not limited to the illustrated example, and a known fixing means such as screwing the base end may be used like the female coupler 6, for example. Further, at both ends of the projecting side surface of the male coupler 6'of the receiving portion base 2 ', insertion holes for fitting the tips of the guide rods 9 provided on the feeding portion base 1'with substantially no gap. 16 are drilled. A quenching fixing bush 17 may be fitted in the insertion hole 16,
This allows the guide rod 9 to be fitted and removed more smoothly. In this embodiment, the axis of the female coupler 6 and the center line of the communication hole 4 are the same, and the axis of the male coupler 6'and the center line of the through hole 20 are the same. The male coupler 6'can be easily assembled and aligned. Next, the operation of the first reference example will be described. The female coupler 6 of the hydraulic feed unit 1 is provided at a predetermined position near the end point (work attachment / detachment station) that is pulled out by the pallet change as described above. On the other hand, when the male coupler 6'of the hydraulic pressure receiving portion 2 provided on the workpiece mounting tool A on the conveyed pallet P is delivered from the machine tool side and approaches a predetermined position (see FIG. 5). First, air is blown from the air blow torch 11 of the hydraulic feed unit 1 by the control of a solenoid valve (not shown), and the male coupler 6'and the guide insertion hole 17 are air blown. When the hydraulic pressure receiving portion 2 approaches the hydraulic pressure feeding portion 1 due to the transfer of the pallet P or the like, first, the guide rod 9 of the feeding portion base 1'is loosely inserted into the insertion hole 16 of the receiving portion base 2'and the male type is formed. The positions of the bases 1'and 2'of each other are adjusted so that the coupler 6'and the female coupler 6 are aligned with the coaxial line, and then the male coupler 6 '.
Is inserted into the female coupler 6 and the two are connected so that they can communicate with each other. Next, when the operation lever 31 is pulled by an external cylinder (not shown), the lever receiver 30 of the ball valve 19 is moved as described above.
It rotates 90 °, so that the valve rod 28 also catches the ball 24 and 90
Rotate to open the ball valve 19 and connect the piping of each part. In synchronism with this, a solenoid valve (not shown) on the hydraulic pressure source side is opened, and the hydraulic fluid discharged from the hydraulic pressure source passes through the communication hole 4 of the feed section base 1'and is fitted and communicated with the coupler constituent sections 6, 6 It flows through the through hole 20 of the receiving part base 2 via the ′ and is supplied to the actuator and the accumulator side. When the workpiece W handed over from the material handling robot or the like is restrained by the workpiece fixture A by this actuator or the like, this is detected and the external cylinder or the like is operated to operate the operation lever.
The oil passage is shut off by the ball valve 19 by moving 31 in the return direction. Then, the supply of hydraulic oil from the hydraulic source is cut off. Next, the feeding base 1'and the receiving base 2'are gradually separated, the male coupler 6'is disengaged from the female coupler 6, and the guide rod 9 is further separated from the insertion hole 16. Next, FIG. 3 shows a second reference example of the present invention as an example of the case where the sending part base 1'is pressed and connected to the receiving part base 2 '. In the second reference example, the hydraulic feed unit 1 is constructed so that the feed base 1'can be moved back and forth to the receiving base 2'side by a pressing cylinder 34 from a fixed support 33 supported at a predetermined position. ing. That is, the fixed support 33 is made of an angle member and is appropriately fixed to a support base. At the center of the fixed support 33, a pressing cylinder 34 for reciprocally moving the feed base 1'in the front-rear direction is fixed. Cylindrical guide receivers 35 are connected to both ends. Further, since the rear end of the guide rod 9 fixed to the feed base 1'is extended in the extension direction and slidably fitted into the guide receiver 35, the feed base 1'can be rattled. It can be moved back and forth without moving. The other configurations are similar to those of the first reference example, and thus the description thereof is omitted. Since the second reference example has the above-mentioned structure, when the pallet is sent out from the machine tool, air is jetted from the air blow torch 11 (not shown) and the male coupler 6'and the insertion hole 16 are inserted.
Is air blown in the same manner as in the above embodiment. Then, when the pallet stops in place, the air supply also stops. Next, when the control solenoid valve (not shown) of the pressing cylinder 34 is opened and the rod of the cylinder is moved forward, the feeding base 1'is moved forward and the tip projection of the guide rod 9 is moved to the receiving base 2. ′
Since it is loosely inserted in the insertion hole 16 of the female coupler 6 for guiding the feed base 1'at both front and rear ends of the guide rod 9,
The male coupler 6'can be securely fitted to the work piece, and the work piece can be restrained by the work piece attachment tool as in the above-described embodiment. When disconnecting, if the supply of oil pressure from the oil pressure source is cut off, the ball valve is operated by the operation lever 31 under the control of the solenoid valve.
19 is closed and the rod of the pressing cylinder 34 is contracted by the control solenoid valve and retracted while guiding the feed base 1 ', so that the female coupler 6 is separated from the male coupler 6'. Then, the pallet P is conveyed to the machine tool side. Although the hydraulic cylinder is used to move the feed unit base 1'back and forth in the above embodiment, a link mechanism or the like may be used. Next, FIG. 4 shows a first embodiment of the present invention. In the first embodiment, an example of a case where the receiving section base 2'is pulled up and connected to the sending section base 1'is shown. In the first embodiment, swing cylinders 36 are provided outside the guide rod 9 at both ends of the feed base 1'of the hydraulic feed 1. The tip of the rod of the swing cylinder 36 extends forward of the guide rod 9 and is connected to an L-shaped locking claw 37. On the other hand, a concave groove 38 that engages with the locking claw 37 is formed on both side surfaces of the receiving portion base 2 '. The other structure is the same as the structure of the above-mentioned reference example, and therefore its explanation is omitted. Since it has the above configuration, in the first embodiment,
When the pallet P comes to a fixed position, it is detected by a limit switch (not shown), the solenoid valve of the swing cylinder 36 is excited, pressure oil is sent to the rod side, and the locking claw 37 at the tip of the rod.
Turns 90 ° inward and engages with the concave groove of the receiving base 2 '. When pressure oil is further sent to the rod side, the rod retracts, whereby the receiving part base 2'is pulled toward the hydraulic feed part 1, and the guide rod 9 of the sending part base 1'is received. Insert into the insertion hole 16 of the base 2'and then the male coupler 6 '
Are fitted and connected to the female coupler 6. After restraining the workpiece W to the workpiece fixture A as in the reference example, when the supply of hydraulic pressure from the hydraulic source is cut off and the ball valve 19 is cut off by the operation lever 31, the swing cylinder 36 is moved by the solenoid valve. Contrary to the above, the rod is extended to move the pallet together with the receiving base 2'in the separating direction, and then the locking claws 37 are reversed by 90 ° to return to the standing posture to form the concave groove of the receiving base 2 '. Disengage from. Then, the pallet P is conveyed to the machine tool side. In this embodiment, the swing cylinder having the locking claws is used to lock and pull the receiving side base portion by the same member, but the structure may be divided for each function. Next, FIGS. 5 and 6 show a second embodiment of the present invention as an example of automation of the operating lever 31. In this second embodiment, a part 20 'of the through hole of the receiving base 2'.
An on-off valve such as a ball valve is not provided to directly form an oil passage for supplying pressure oil to a valve switching cylinder described later, and the other through holes 20 are provided with the ball valves 19 of the ball valves 19 in the same manner as in the respective embodiments. A plurality of lever receiving pieces 30 that are respectively linked to the valve stem 18
And one operating lever that pivotally attaches the tip of each lever receiving piece 30.
31 is provided, and the base end of the operation lever 31 is pivotally attached to one end of the ball valve switching cylinder 39. That is, in the illustrated example, the valve switching cylinder 39 connects the clevis 42 of the cylinder to the support base 43 fixed to the receiving base 2 '. A bracket 40 having a U-shaped cross section is connected to the rod side, and the base end of the operation lever 31 is sandwiched between the bracket 40 and the bracket 40 and is pivotally attached by a pin 41. For the sake of convenience of explanation, the constructions of the other workpiece attachments are the same as those of the first embodiment, but the constructions of the first reference example, the second reference example and the like may be adopted. With the above configuration, in the second embodiment, when the solenoid valve is opened, pressure oil is injected into the piston side of the switching cylinder 39,
The rod shrinks. As a result, the operation lever 31 pivotally attached to the bracket 40 at the rod tip reverses the lever receiver 30 and the valve rod of the ball valve 19.
The pressure oil is supplied through the coupled coupler components 6 and 6'because the ball 28 is rotated 90 degrees to rotate the ball 28. When the supply of pressure oil is stopped, the switching cylinder 39 extends the rod to block the through hole 20. FIG. 7 shows a third embodiment as an example of the case where the coupler component for connection and the on-off valve for connection and disconnection are provided separately. In the third embodiment, the receiving part base 2'is divided into two parts, and the first receiving part base 2a 'is provided with a male coupler 6', and the second receiving part base 2 '.
An operation lever 31 for controlling the ball valve 19 and the valve rod 18 (not shown) is provided at b ', and both are connected by a pipe serving as an oil passage. The other structure is similar to that of the first embodiment. According to this, it can be used when it is structurally preferable that the coupler component 6 ', the on-off valve 19 and the operating lever 31 thereof are provided separately because of the structure of the workpiece attachment. The on-off valve is not limited to a ball valve in this invention,
Any valve that can be shut off may be used. Further, in the embodiment, the case where the hydraulic pressure is used for the operation of the actuator and the like is illustrated, but the same can be applied to the case where the air pressure or other fluid is used.

[Effect of device]

In this invention, since the line communication can be mechanically interrupted in the means for supplying the working fluid to the actuator for restraining the work piece by the work piece fitting tool, the fitting failure of the coupler may occur due to oil leakage due to dust bite. There is no risk of failure, and even if a dust bite occurs, there is no harm due to the external switching operation, and it is efficient. Further, since the coupler configuration unit may be connected to each actuator or pressure accumulator via a pipe connected to the receiving unit base,
It is highly versatile and can be used for various work fixtures. Further, since the on-off valve and the coupler constituent part are connected through the through hole of the receiving part base, the size and weight can be reduced, and the coupler forming part can be connected to the through hole of the receiving part base and the communicating hole of the sending part base. Since it can be molded simply by fitting it in and mounting it in the coaxial position, it is easy to align the coupler components and has a simple structure, which is highly reliable and ideal for industrial mass production. Further, the engaging portion is locked to the receiving portion base of the fluid receiving portion at the approaching position, pulled by the advancing / retreating means, and fitted into the coupler forming portion on the receiving portion base side and the coupler forming portion on the base side. It is easy to operate and has excellent operability. Further, if the operation lever is controlled by a fluid pressure cylinder that operates with the fluid sent at the time of connection, the operation lever can be easily automated.

[Brief description of drawings]

FIG. 1 is a perspective view of a first reference example relating to a fluid supply structure of a work fixture, FIG. 2 is a sectional view of the first reference example, and FIG.
FIG. 4 is a perspective view of a reference example, FIG. 4 is a perspective view of a first embodiment relating to a fluid supply structure for a work fixture of the present invention, and FIG. 5 is a perspective view showing a pallet change state of the first embodiment. Is the second
FIG. 7 is a perspective view of the third embodiment, and FIG. 7 is a perspective view of the third embodiment. 1 ... hydraulic feed part 1 '... feed part base 2 ... hydraulic receiving part 2' ... receiving part base 4 ... communication hole 6 ... female coupler 6 '... male coupler 8 ... guide Hole 9 …… Guide rod 11 …… Air blow torch 16 …… Insertion hole 18 …… Valve chamber 19 …… Ball valve 20 …… Through hole 28 …… Valve rod 31 …… Operating lever 34 …… Pressing cylinder 35 …… Guide receiver 36 …… Swing cylinder 37 …… Clamp claw 39 …… Ball valve switching cylinder

Claims (7)

[Scope of utility model registration request] 1. A fluid receiving portion connected to an actuator for restraining a workpiece, the fluid receiving portion being provided to a workpiece mounting tool that conveys a predetermined path so as to intermittently supply a working fluid, and the fluid receiving portion is attached to and detached from the fluid receiving portion. In a fluid supply structure of a workpiece fixture, which includes a fluid feed part that is operably connected and supplies an operating fluid from a fluid source, a fluid receiver is connected to a plurality of flow paths connected to the actuator, respectively. A plurality of through-holes are provided in the receiving base, and one tubular coupler forming portion having a distal end disposed outwardly is connected to the distal end side of each through-hole so that they can communicate with each other, and An on-off valve is provided so that the valve rod of each on-off valve can be interlocked with an operating lever formed on the outside of the receiving part base to connect and disconnect the fluid, and the fluid sending part is connected to multiple flow paths branched from the fluid source. Communication holes that are connected to each other and that face the through holes On the tip side of the communication hole, there is provided another coupler configuration part on the tip end side of the communication hole, which corresponds to one coupler configuration part provided on the receiving part base on a coaxial line and communicates at the time of fitting, which is in communication with the other coupler configuration part. At the same time, it is provided with an engaging portion that engages with the receiving portion base on the sending portion base and an advancing / retreating means for advancing / retreating the engaging portion. A fluid for a work fixture, characterized in that the engaging portion is locked and pulled by the advancing / retreating means to fit and connect the coupler forming portion on the receiving portion base side to the coupler forming portion on the feed portion base side. Supply structure. 2. A fluid receiving portion connected to an actuator for restraining a workpiece, the actuator being provided on a workpiece mounting tool for transporting a predetermined path so as to intermittently supply a working fluid, and the fluid receiving portion is attached to and detached from the fluid receiving portion. In a fluid supply structure of a workpiece fixture, which includes a fluid feed part that is operably connected and supplies an operating fluid from a fluid source, a fluid receiver is connected to a plurality of flow paths connected to the actuator, respectively. A plurality of through-holes are provided in the receiving base, and one tubular coupler forming portion having a distal end disposed outwardly is connected to the distal end side of each through-hole so that they can communicate with each other, and An on-off valve is provided so that the valve rod of each on-off valve can be interlocked with an operating lever formed on the outside of the receiving part base to connect and disconnect the fluid, and the fluid sending part is connected to multiple flow paths branched from the fluid source. Communication holes that are connected to each other and that face the through holes On the tip side of the communication hole, there is provided another coupler configuration part on the tip end side of the communication hole, which corresponds to one coupler configuration part provided on the receiving part base on a coaxial line and communicates at the time of fitting, which is in communication with the other coupler configuration part. The receiving base is provided with a fluid pressure cylinder for controlling the operating lever, and a through hole communicating with a part of the coupler base of the receiving base is provided with the fluid pressure cylinder and the on-off valve. Without being directly connected, the through hole communicating with other coupler components has an opening / closing valve and can be opened / closed via each valve rod by the operation lever, and is connected to the coupler component on the fluid feed unit side. A fluid supply structure for a work fixture, characterized in that the fluid sent at the time of connection with a coupler component on the fluid receiving portion side is supplied to the fluid pressure cylinder to enable operation of an operating lever. 3. A receiving part base of a fluid receiving part at an approaching position, wherein the sending part base has an engaging part for engaging with the receiving part base, and an advancing / retreating means for advancing / retreating the engaging part. 3. The engagement part is locked to the base and is pulled by the advancing / retreating means so that the coupler forming part on the receiving part base side is fitted and connected to the coupler forming part on the feed part base side. A fluid supply structure for a work piece fixture as described. 4. A receiving side base and a sending side base are provided with a pair of guide means consisting of a projection and a recess along with a pair of coupler constituent parts respectively provided on the base and the projection. However, one of the coupler components is set to a length that can be inserted into the recess before the coupler components approach and fit into the other coupler component, and the pair of coupler components are positioned. Item 3. A fluid supply structure for a work fixture according to item 1 or 2. 5. An air blow torch having a plurality of injection nozzles is fixed above the fluid feed portion so as to correspond to the coupler constituent portion, and the tip of the air blow torch is fixed when the coupler constituent portion on the fluid receiving portion side approaches. Blow is performed.
Alternatively, the fluid supply structure for the work fixture according to Item 3. 6. An advancing / retreating means having an engaging portion is composed of a swing cylinder provided with a locking claw at a tip thereof for engaging with an engaging groove formed in a receiving part base by rotational displacement. The fluid supply structure for a work fixture according to claim 1, wherein: 7. The receiving part base is divided into a first receiving part base and a second receiving part base, and the first receiving part base has a coupler forming part in a through hole, and a second receiving part base. An opening / closing valve is built in the through hole in the base part, and an operation lever for interlocking the valve rod of the opening / closing valve is provided outside the second receiving part base to enable opening / closing of the opening / closing valve. A fluid supply structure for a work fixture according to any one of claims 1 to 6, wherein: