JP2006144926A - Fluid coupler device and working machine equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To economically solve problems with the deposition of foreign matters in engaging holes of sockets of a fluid coupler device. <P>SOLUTION: The fluid coupler device comprises a sockets 20A, 20B each having engaging hole 21a to be communicated with a fluid supply destination and a plug 25 having an engaging protruded portion 26a to be communicated with a fluid supply source. The plug has a first opening means 24 to be opend with the engaging protruded portion fitted to the engaging hole as well as second opening means 26c, 26d, 27b for jetting fluid from the plug to the outside even in such a state that the first open means is not open. This working machine equipped with the fluid coupler device comprises a taper 3 on which the sockets of the fluid coupler device are provided to be communicated with a fluid pressure cylinder device 11 for a work clamper and a main shaft on which the plug is mounted to be communicated with a working fluid supply passage 5a formed therein and engaged/disengaged with/from the sockets. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fluid coupler apparatus including a socket and a plug, and more particularly to a fluid coupler apparatus capable of removing foreign matter contained in an engagement hole of a socket and a processing machine including the fluid coupler apparatus.

  A workpiece W such as a case or housing of an automatic transmission of an automobile is mounted on a rotary table 3 of a vertical machining center (processing machine) 1 as shown in FIG. 1 and attached by clamping devices 10A, 10B, and 10C. The tool T is mounted on the spindle 5 via the tool holder 6. The clamping devices 10A, 10B, and 10C used in this case are usually clamped and unclamped by a fluid pressure cylinder device 11 (see, for example, FIGS. 2 and 3), but the table 3 is rotated when the workpiece W is processed. If the fluid pressure supply device of the processing machine 1 main body and the fluid pressure cylinder device 11 are connected and the flexible piping for supplying and discharging the fluid pressure is left attached to the table 3, the table 3 The processing conditions may be restricted due to the rotation. Therefore, a fluid coupler device comprising a socket 20 fixed on the table 3 and a plug that can be engaged / removed with respect to the socket 20 is provided in the middle of the pipe, and the engagement protrusion of the plug is inserted into the socket 20 only when clamping / unclamping. In other cases, the engagement protrusion of the plug is separated from the engagement hole of the socket 20. As a fluid coupler device used for such a purpose, for example, as shown in FIG. 4 of Patent Document 1, a socket and a plug are provided, and an opening / closing valve biased by a spring is provided on both, and the plug is attached to the socket. There is one in which the opening and closing valves are pushed against each other against the force of the spring by being inserted to open. In the example shown in FIG. 1, the socket 20 is divided into two parts, that is, a clamp side socket 20 </ b> A and an unclamp side socket 20 </ b> B, but it is also possible to combine them into one.

The processing machine including the fluid coupler device having the above-described structure requires a fluid pressure supply source such as air pressure or hydraulic pressure for clamping and unclamping by the fluid pressure cylinder device 11, and the plug is engaged with the socket 20. Since a device and a control system for detachment are required, there is a problem that the manufacturing cost increases. In order to solve such a problem, the applicant previously proposed a technique according to Japanese Patent Application No. 2003-207466. This is because the plug of the fluid coupler device can be attached to the spindle of the processing machine formed around the coolant supply passage, and the spindle on which the plug is attached is actuated by the control device of the processing machine. The plug is engaged / disengaged from / to the hydraulic cylinder device 11 and the coolant is supplied / discharged to / from the hydraulic cylinder device 11 via the coolant supply passage 5a formed in the main shaft 5 in the engaged state to clamp / unclamp the workpiece W. It is what I did. This eliminates the need for a separate fluid pressure supply source for clamping and unclamping, and a separate device and control system for engaging and disengaging the plug with the socket. The problem is solved.
Japanese Patent Application Laid-Open No. 08-240328 (paragraph [0027], FIG. 4).

  However, in the technology according to Japanese Patent Application No. 2003-207466, foreign matter such as chips generated by processing a workpiece may enter the socket engagement hole, and in this state, the engagement protrusion of the plug is engaged with the socket. If it tries to fit into the joint hole, it may interfere with the engagement between the engagement projection and the engagement hole, or it may cause a foreign object to get caught between the engagement projection and the engagement hole and cause damage to the engagement portion. is there. In particular, when an O-ring made of a flexible elastic material is provided on the inner surface of the engagement hole for the purpose of improving the sealing property between the engagement protrusions, the O-ring is damaged and leaks, and is sent to the supply destination. There is a possibility that the pressure of the fluid to be generated is lowered and the operation of the fluid pressure cylinder device 11 is hindered. Such a problem occurs when foreign matter adheres to the socket engagement hole. Therefore, the problem is not limited to the fluid coupler device used in the fluid supply path to the clamping device of the processing machine, but also in the fluid coupler device used for other purposes. Is also present. This problem can be prevented by removing foreign matter by blowing air into the engagement hole by an air injection device such as an air gun before fitting the engagement protrusion of the plug into the engagement hole of the socket. For this purpose, an air injection device, a device for operating the air injection device, and a control system are required, which causes a new problem that the manufacturing cost increases.

  It is an object of the present invention to simultaneously and economically solve each problem caused by foreign matter adhering to the engagement hole of the socket of the fluid coupler device by improving the structure of the plug of the fluid coupler device.

  The fluid coupler apparatus according to claim 1 includes a socket having an engagement hole communicated with a fluid supply destination, and a plug having an engagement projection communicated with a fluid supply source. In the fluid coupler apparatus provided with the first opening means that is opened by fitting the part into the engaging hole, the fluid in the plug is allowed to flow even when the first opening means is not opened in the plug. A second opening means for ejecting to the outside is further provided.

  2. The fluid coupler apparatus according to claim 1, wherein the first opening means is an annular valve seat formed inside the front end portion of the engaging protrusion, and a circular shape seated by being pressed against the valve seat by an elastic force. It is preferable that the valve member is separated from the valve seat against the elastic force by fitting the plug into the engagement hole and contacting a part of the socket.

  3. The fluid coupler apparatus according to claim 2, wherein the second opening means extends from a radially inner edge of the valve seat to a position outside the outer edge of the valve member at a distal end portion of the engaging protrusion where the valve seat is formed. It is preferable that it is made of at least one slit formed on the surface.

  3. The fluid coupler apparatus according to claim 2, wherein the second opening means includes at least one small hole formed at a position outside the outer edge of the valve member at a distal end portion of the engaging protrusion where the valve seat is formed. It is preferable to become.

  In the fluid coupler apparatus according to claim 2, it is preferable that the second opening means is composed of at least one concave groove formed on a surface of the valve member that contacts the valve seat.

  In the fluid coupler apparatus described in the preceding paragraphs, it is preferable that the socket is provided with a check valve that allows the flow toward the fluid supply destination but prevents the flow in the opposite direction.

  According to a seventh aspect of the present invention, there is provided a processing machine including the fluid coupler apparatus, wherein a workpiece is provided by a spindle having a processing fluid supply passage communicated with a processing fluid supply source and a clamping device using a fluid pressure cylinder device. In a processing machine provided with a table to be clamped, the table is provided with a socket of a fluid coupler device according to any one of claims 1 to 5 and communicated with a fluid pressure cylinder device. The plug of the coupler device can be mounted so as to communicate with the machining fluid supply passage.

  A processing machine comprising the fluid coupler device according to claim 7 moves the main shaft in a state in which the plug is attached to the main shaft to bring the plug closer to a socket provided on the table, and the processing fluid is supplied from the second opening means. Is ejected into the engagement hole of the socket to remove foreign matter inside, and then the engagement protrusion is fitted into the engagement hole, and the working fluid from the supply source is supplied to the hydraulic cylinder device and clamped. It is preferable that a control device for operating the device is provided.

  According to the fluid coupler device of the first aspect, the second opening means opens at the distal end of the engagement protrusion a when the engagement protrusion of the plug is brought close to the socket. By reducing the area, a part of the fluid supplied to the plug can be ejected vigorously into the engagement hole, and foreign matter inside the engagement hole can be efficiently removed. When the protrusion is fitted into the engagement hole, there is no possibility that the fitting will be hindered or the fitting portion between the engagement protrusion and the engagement hole will be damaged. Further, when the engaging protrusion is fitted in the engaging hole, the first opening means is opened and the opening area at the tip of the engaging protrusion is increased, so that the fluid from the supply source is accompanied by a pressure loss. Can be supplied to suppliers.

  According to the fluid coupler device of the second aspect, since the first opening means is automatically opened only by fitting the engagement protrusion of the plug into the engagement hole of the socket, an extra operation is performed. In addition, the fluid from the supply source can be supplied to the supply destination without any pressure loss.

  In any of the fluid coupler apparatuses according to claims 3 to 5, the second opening means can be formed very easily.

  According to the fluid coupler device of the sixth aspect, the fluid supplied to the supply destination in a state where the plug is engaged with the socket is not discharged to the outside even when the plug is detached from the socket. The supply destination can be maintained in a state where the fluid is supplied.

  Further, according to the processing machine equipped with the fluid coupler device according to claim 7, the plug and socket of the fluid coupler device for operating the clamp device using the operating mechanism and control system of the main shaft that the processing machine originally has. Since the machining fluid supply source and the machining fluid supply passage can be used as the fluid for operating the hydraulic cylinder device of the clamp device and the supply passage thereof, the fluid coupler apparatus The structure of the processing machine equipped with can be greatly simplified.

  According to the processing machine provided with the fluid coupler device according to claim 8, engagement and disengagement of the plug with respect to the socket and the supply of the processing fluid to the hydraulic cylinder device using a control device that is originally provided in the processing machine. Feeding can be controlled to automate the operation of the clamping device.

  Hereinafter, the best mode of a fluid coupler apparatus according to the present invention and a processing machine including the fluid coupler apparatus according to the present invention will be described with reference to FIGS. First, the overall structure of an embodiment of a processing machine provided with a fluid coupler device will be described. The processing machine provided with the fluid coupler device of this embodiment is a vertical machining center 1 as shown in FIGS. 1 and 2, and is formed from a control device on the bottom surface of a space formed in an intermediate portion of the device body 2. A table 3 whose rotation angle is controlled by the command is provided, and a spindle 5 is provided on the ceiling of the space so as to be movable in three directions of X, Y, and Z, facing the table 3. A workpiece W is placed on the center of the table 3 and is attached by three sets of hydraulic pressure-type clamping devices 10A, 10B, 10C. A part of the table 3 is attached to each of the clamping devices 10A, 10B, 10C. A pair of clamp side socket 20A and unclamp side socket 20B for supplying and discharging the working fluid is provided.

  A tool holder 6 to which the tool T is fixed can be selectively mounted on the lower end portion of the main shaft 5 on the workpiece W side. A tool stocker (not shown) provided in the apparatus main body 2 stores a large number of tool holders 6 to which the tool T is fixed. The tool T and the tool holder 6 attached to the lower end portion of the spindle 5 are connected to an auto tool changer (not shown). (Omitted), the tool T and the tool holder 6 necessary for the machining at that time are exchanged. A machining fluid supply passage 5a is formed at the center of the main shaft 5 and communicates with a supply source (reservoir, pump and control valve not shown) of a machining fluid such as coolant, cutting fluid, and lubricant (hereinafter simply referred to as coolant). The coolant supplied through the coolant supply passage (working fluid supply passage) 5a is supplied to the machining site through the tool holder 6 and the through hole formed in the tool T. An operation panel 8 is provided on one side of the apparatus main body 2 to operate the machining center 1 and to input data necessary for control and to display an operation state.

  Since the clamp devices 10A, 10B, and 10C have the same structure, the structure of the clamp device 10A will be described with reference to FIGS. The clamp device 10 </ b> A includes a fluid pressure cylinder device 11 and a clamp member 14. The fluid pressure cylinder device 11 has a cylinder 12 fixed to the table 3 and is fitted in the cylinder 12 so as to be slidable in a liquid-tight manner, and an upper clamping pressure chamber 12a and a lower unclamping pressure chamber are formed therein. The piston 13 is composed of a piston 13 partitioned into 12b. The piston 13 is provided with a piston rod 13a that extends coaxially upward and penetrates the upper end of the cylinder 12 in a liquid-tight and slidable manner. . A stopper 12c that restrains the upward movement of the piston 13 at a predetermined position is provided on the inner surface of the cylinder 12, and a distal end portion 14a that protrudes in the radial direction is provided at the upper end of the piston rod 13a that protrudes upward from the cylinder 12. A clamp member 14 having the above is fixed. The clamp member 14 is moved up and down by the fluid pressure cylinder device 11. When the clamp member 14 is lifted as shown by a solid line, the tip portion 14 a is separated from the edge of the workpiece W, and when the clamp member 14 is lowered as shown by a two-dot chain line, the tip portion 14 a is a table. 3 is rotated by a cam mechanism (not shown) so as to overlap the edge of the workpiece W placed on the workpiece 3, and the workpiece W is clamped.

  In the middle of the fluid passage for supplying and discharging the fluid to and from the fluid pressure cylinder device 11, a fluid coupler device that forms the main part of the present invention is provided. This fluid coupler apparatus is mainly composed of a socket 20 and a plug 25 as shown in FIGS. In this embodiment, the socket 20 includes a clamp side socket 20A and an unclamp side socket 20B. Both the sockets 20A and 20B have the same structure, and the clamp side socket 20A and the plug 25, and the unclamp side socket 20B and the plug are plugged. 25 constitute a set of fluid coupler devices.

  As shown in FIGS. 1 to 3, the clamp side socket 20A and the unclamp side socket 20B are attached to the table 3 side by side so that the engagement hole 21a side protrudes upward, and the clamp side socket 20A is The clamp side fluid passage 15 communicates with the clamp pressure chambers 12a of the fluid pressure cylinder devices 11 of the three sets of clamp devices 10A, 10B, and 10C, and the unclamp side socket 20B is connected through the unclamp side fluid passage 16 with 3 The clamp devices 10A, 10B, and 10C of the set communicate with the unclamping pressure chamber 12b of each fluid pressure cylinder device 11. The clamp-side fluid passage 15 is provided with an accumulator 17 and a pressure gauge 18. The plug 25 is attached to a tool holder 35 together with a release tool 30 described below, and is selectively attached to the lower end portion of the main shaft 5 by an auto tool changer, like the tool T attached to the tool holder 6. .

  As shown mainly in FIG. 3, the release tool 30 includes a release tool main body 31 that is coaxially fixed to the tip of the tool holder 35, a pair of operating arms 32 that extend from the tip to both sides, and each of the operating arms. The operation projections 33a and 33b extend from the tip end portion of 32 to the table 3 side in parallel with the central axis of the release tool main body 31. The plug 25 is fitted and attached to a fitting hole 31a formed coaxially at the tip of the release tool main body 31, and the distance between each operation projection 33a, 33b and the central axis of the release tool main body 31 is determined by a table. 3 is the same as the distance between the two sockets 20A and 20B provided in the third. A communication hole 31 b provided in the center of the release tool main body 31 communicates with the coolant supply passage 5 a of the main shaft 5 through the center hole 35 a of the tool holder 35.

  Next, the fluid coupler apparatus including the socket 20 (20A or 20B) and the plug 25 will be mainly described with reference to FIG. The socket 20 includes a socket body 21, a check valve 22, and an O-ring 23. The socket main body 21 has a bottomed cylindrical shape with the lower side closed. A cylindrical engagement hole 21a is formed on the upper side of the inward flange 21c formed in the intermediate portion in the vertical direction, and a valve storage space 21b is formed on the lower side. Has been. In the valve storage space 21b, a check valve comprising a valve seat 22a formed on the lower side of the inward flange 21c, a spherical valve body 22b, and a spring 22c that elastically presses the valve body 22b against the valve seat 22a. A check valve 22 comprising 22 is provided, and a rod 22d protruding upward through a central hole of the inward flange 21c is fixed to the valve body 22b. An O-ring 23 is provided in an annular groove formed slightly above the vertical middle portion of the engagement hole 21a, and a part of the O-ring 23 protrudes slightly inward from the surface of the engagement hole 21a.

  The plug 25 has a plug main body 26 and a valve member 27 as main components. The plug body 26 has a cylindrical shape, and a cylindrical engagement projection 26a that can be inserted into the engagement hole 21a of the socket body 21 with a slight gap is formed at the tip thereof. The plug body 26 is formed with a slightly narrower middle portion in the longitudinal direction of its outer periphery and is fluid-tightly fitted into the fitting hole 31a of the release tool body 31 via an O-ring 34, and the threaded portion at the tip thereof is inserted. By screwing, it is coaxially fixed to the release tool main body 31. The center hole of the plug body 26 is communicated with the coolant supply passage 5a of the main shaft 5 through the communication hole 31b of the release tool body 31 and the center hole 35a of the tool holder 35. An annular conical valve seat 26b is formed inside the distal end of the engaging projection 26a, and the distal end of the central hole of the plug body 26 is opened to the outside by a central hole of the valve seat 26b.

  The valve member 27 is composed of a shaft portion 27b and a truncated cone-shaped tip portion 27a provided at one end thereof, and has a through hole in which the small-diameter portion of the latter half of the shaft portion 27b is fitted in the center hole of the plug body 26. The holder 28 is slidably held. The holder 28 is prevented from retreating by a retaining ring 28b locked to the center hole of the plug body 26 via a thin tubular collar 28a, and the valve member 27 is located between the intermediate step portion of the shaft portion 27b and the holder 28. The conical surface of the tip 27a is elastically urged to the valve seat 26b by the spring 29 interposed therebetween. The first opening means 24 is formed by the distal end portion 27a of the valve member 27 and the valve seat 26b, and the first opening means 24 is in a state where the conical surface of the distal end portion 27a is in close contact with the valve seat 26b by the spring 29. When the distal end portion 27a is retracted against the spring 29 and a gap is formed between the valve seat 26b and the first opening means 24 is opened.

  The narrow end of the engagement protrusion 26a of the plug body 26 has three narrow widths extending radially outward from the central hole of the valve seat 26b to reach a position outside the outer edge of the distal end 27a of the valve member 27. Are formed at equiangular intervals in the circumferential direction. Even if the first opening means 24 is closed, the slit 26c communicates the inside of the plug main body 26 with the outside, and when the coolant pressure inside is high, the second opening means for ejecting it to the outside is provided. Form. The number of the slits 26c is arbitrary, and the passage area of the second opening means by the slit 26c is considerably smaller than the passage area of the first opening means 24 when fully opened as will be described later.

  As shown in FIG. 4A, when the plug 25 is separated from the socket 20, the conical surface of the tip 27a of the valve member 27 is brought into close contact with the valve seat 26b by the spring 29, and the first opening means 24 is Closed. However, as shown in FIG. 4 (b), when the engagement protrusion 26a of the plug 25 is fitted in the engagement hole 21a of the socket 20, the tip of the rod 22d of the check valve 22 in the socket body 21 is the valve. In a state where the first opening means 24 and the check valve 22 are in contact with the front end portion 27a of the member 27 and the front end surface of the engagement protrusion 26a is in contact with the bottom surface of the engagement hole 21a, the first opening means 24 and the check valve 22 are respectively connected to the front end portion 27a. And the valve body 22b is separated from the valve seats 26b and 22a, and both are fully opened. As a result, the coolant supply passage 5a in the main shaft 5 and the clamp-side fluid passage 15 or the unclamp-side fluid passage 16 are communicated with each other via the fluid coupler device including the socket 20 and the plug 25.

  Next, the overall operation of the machining center 1 having the above-described fluid coupler device will be described. When the workpiece W is not mounted on the table 3, the coolant in the clamp pressure chamber 12a of the fluid pressure cylinder device 11 of each of the clamp devices 10A, 10B, and 10C is discharged and the coolant is supplied to the unclamp pressure chamber 12b. Thus, the plug 25 is detached from the sockets 20A and 20B, the clamp members 14 are raised as shown by the solid lines in FIGS. 2 and 3, and the tip portions 14a are positioned away from the edge of the workpiece W to be mounted. It is in. In this state, the work W is brought into a predetermined work mounting position by rotating the table 3 by a control device of the machining center 1 (provided in a control panel (not shown), hereinafter simply referred to as a control device) to bring the work W into a loading device (not shown). ) To be placed at a predetermined position on the table 3. In this state, a tool holder 35 to which a release tool 30 and a plug 25 are attached is attached to the tip of the main shaft 5.

  First, the control device moves the main shaft 5 to bring the plug 25 into a position coaxial with and close to the clamp-side socket 20A, opens the control valve of the supply source, and enters the coolant into the plug 25 through the coolant supply passage 5a. Supply. In this state, since the first opening means 24 is closed, a part of the coolant in the plug 25 is ejected from the slit 26c having a small passage area into the engagement hole 21a of the clamp side socket 20A. Remove foreign material attached to the surface. After removing the foreign matter for a predetermined short time, the control device lowers the main shaft 5 so that the engaging protrusion 26a of the plug 25 is placed in the engaging hole 21a of the clamp side socket 20A, as shown in FIG. 4 (b). And the operating projection 33b of the release tool 30 is inserted into the unclamping socket 20B, and the rod 22d of the check valve 22 is pushed down to open the check valve 22 of the unclamping socket 20B. Thereby, the coolant from the supply source is supplied to each clamp device 10A via the coolant supply passage 5a of the main shaft 5, the center hole 35a of the tool holder 35, the fluid coupler device including the plug 25 and the clamp side socket 20A, and the clamp side fluid passage 15. , 10B, and 10C are supplied to the clamp pressure chamber 12a of the cylinder 12, and the clamp member 14 descends and rotates to clamp the work W placed on the table 3 at that position. The coolant in the unclamping pressure chamber 12b is discharged to the outside through the unclamping fluid passage 16 and the check valve 22 opened in the unclamping socket 20B, and the discharged coolant is received by the tray below the apparatus main body 2. And returned to the coolant reservoir.

  Next, the control device raises the main shaft 5 to detach the plug 25 from the clamp-side socket 20A, and uses the plug 25, the release tool 30 and the tool holder 35 attached to the lower end portion of the main shaft 5 by the auto tool changer. The workpiece W is machined by exchanging with the tool T and the tool holder 6. During this processing, the clamp side socket 20A is closed by the check valve 22, and the pressure in the clamp side fluid passage 15 and each clamp pressure chamber 12a is maintained by the accumulator 17 even if there is some leakage in the check valve 22 or the like. Therefore, the workpiece W is securely clamped by the clamp devices 10A, 10B, and 10C. When the machining is completed, the control device replaces the machining tool T and the tool holder 6 mounted on the lower end portion of the main shaft 5 with the plug 25, the release tool 30 and the tool holder 35 by the auto tool changer. Then, the main shaft 5 is moved so that the plug 25 is coaxial with and close to the unclamping socket 20B, the coolant is supplied into the plug 25 in the same manner as described above, and the coolant is urged from the slit 26c of the plug 25. The foreign matter adhered to the inside of the engagement hole 21a of the unclamp side socket 20B is removed well. Next, as described above, the main shaft 5 is lowered to fit the engagement protrusion 26a of the plug 25 into the engagement hole 21a of the unclamp side socket 20B, and the operation protrusion 33a of the release tool 30 is inserted into the clamp side socket 20A. And the check valve 22 is opened. Thereby, the coolant from the supply source is supplied to the unclamping pressure chamber 12b of the cylinder 12 of each of the clamp devices 10A, 10B, and 10C, and the clamp member 14 is raised and rotated to unclamp the workpiece W. The coolant in the clamp pressure chamber 12a is discharged to the outside through the check valve 22 opened in the clamp side socket 20A and returned to the coolant reservoir in the same manner as described above. If the workpiece W is unloaded from the table 3 by the unloading device (not shown), one cycle of the machining process is completed, and the workpiece W is again placed at a predetermined position on the table 3 by the unloading device (not shown). The next processing step is started.

  According to the machining center 1 of the above-described embodiment, the pipes are not connected to the sockets 20A and 20B for supplying fluid to the fluid pressure cylinder device 11 of the clamp devices 10A, 10B, and 10C during processing. The table 3 for clamping is freely rotatable, and the processing conditions are not restricted thereby. In the machining center 1 of this type, the sockets 20A and 20B have the engagement holes 21a with the plugs 25 opened during processing, so that foreign matter such as chips may enter the engagement holes 21a and adhere to them. There is. However, according to the above-described embodiment, a small amount of fluid is supplied from the tip of the engaging protrusion 26a through the second opening means 26c having a small opening area with the engaging protrusion 26a of the plug 25 approaching the socket 20. The foreign matter inside can be efficiently removed by ejecting into the engagement hole 21a vigorously, and when the engagement protrusion 26a is subsequently fitted into the engagement hole 21a, the fitting is hindered. There is no risk of causing damage to the engagement protrusions and the engagement portions of the engagement holes. Alternatively, the O-ring 23 provided in the engagement hole 21a of the socket body 21 is damaged, and the pressure of the coolant supplied to the fluid pressure cylinder device 11 is reduced, and the workpiece W is clamped by the clamp devices 10A, 10B, and 10C. Is no longer incomplete. Further, when the engaging protrusion 26a is fitted into the engaging hole 21a, the first opening means 24 is automatically opened and the opening area at the tip of the engaging protrusion 26a is increased, so that the fluid from the supply source Can be supplied to the supply destination without any pressure loss. Further, since the second opening means of the plug 25 is formed by the slit 26c formed at the tip of the engaging protrusion 26a, it can be formed very easily.

  In the fluid coupler apparatus of the above-described embodiment, the sockets 20A and 20B are provided with the check valve 22 that allows the coolant flow toward the supply destination but prevents the flow in the opposite direction. Since the coolant supplied to the fluid pressure cylinder device 11 in a state in which it is engaged with the socket 20 is not discharged to the outside even if the plug 25 is detached from the socket 20, the clamp devices 10A, 10B, 10C It can be securely held in a clamped state. However, the fluid coupler apparatus of the present invention is not limited to this, and the check valve 22 may be omitted depending on the application.

  Also, according to the machining center 1 of the above-described embodiment, the plug 25 and the socket 20 of the fluid coupler device for operating the clamping devices 10A, 10B, and 10C are used as the operating mechanism and control system of the main shaft 5 that the machining center 1 originally has. Therefore, it is possible to automate the operation of the clamping device 10 by controlling the engagement / disengagement of the plug 25 to / from the socket 20 and the supply of the working fluid to the fluid pressure cylinder device 11. it can. In addition, it is not necessary to separately provide an operation mechanism and a control system for that purpose, so that the structure of the machining center provided with the fluid coupler device can be greatly simplified.

  Next, a modification of the second opening means will be described with reference to FIGS. In the modification shown in FIG. 6, the plug body 26 of the plug 25 is the same as the plug body 26 of the plug 25 of the above-described embodiment except for the slit 26 c, and the valve seat of the engaging protrusion 26 a of the plug body 26. Three small holes 26d are formed at equiangular intervals in the circumferential direction at a position outside the outer edge of the distal end portion 27a of the valve member 27 at the distal end portion where 26b is formed. The valve member 27 used for the plug 25 is the same as that of the above-described embodiment. This small hole 26d communicates the inside of the plug body 26 with the outside even when the first opening means 24 is closed, and when the coolant pressure inside is high, the second opening means ejects it to the outside. Form.

  In the modification shown in FIG. 7, the slit 26c of the plug body 26 is stopped, and instead, three narrow grooves 27c extending in the generatrix direction are formed on the conical surface that comes into contact with the valve seat 26b of the tip 27a of the valve member 27A. Are formed at equal angular intervals in the circumferential direction. Even if the first opening means 24 is closed, the concave groove 27c communicates the inside of the plug body 26 with the outside, and when the internal coolant pressure is high, the second opening means ejects the outside. Form.

  The numbers of the small holes 26d and the concave grooves 27c are arbitrary, and the passage area of the second opening means formed by the small holes 26d or the concave grooves 27c is the same as that of the first opening means 24 when fully opened. It is much smaller than the passage area. The second opening means 26c, 26d, and 27b including slits, small holes, concave grooves, and the like adjust the angle with respect to the axis of the plug 25 to change the direction of jetting of the coolant, and also twist the axis of the plug 25. By giving swirl to the coolant jetted out, the effect of removing foreign matter can be enhanced.

  In the embodiment described above, the sockets 20A and 20B are provided on the table 3 so that the engagement hole 21a side protrudes upward, but the sockets 20A and 20B protrude on the vertical surface of the table 3 and the engagement hole 21a sideways. In this case, the plug 25 and the two operating projections 33 a and 33 b may be attached so that their center lines are orthogonal to the center line of the tool holder 35. In this way, the entry of foreign matter into the engagement holes 21a of the sockets 20A and 20B is reduced, and the removal of foreign matter that has entered due to the ejection of coolant is facilitated.

  In the above-described embodiment, the two sockets 20 are the clamp-side socket 20A and the unclamp-side socket 20B. However, the present invention is not limited to this, and the socket 20 is not necessarily divided into two depending on the application target of the fluid coupler device. There is no need. In the above-described embodiment, the case where the fluid supplied from the supply source is a liquid has been described. However, the present invention is not limited to this, and the present invention can also be applied to a case where the fluid is a gas.

It is a front view which shows the whole structure of one Embodiment of the processing machine provided with the fluid coupler apparatus by this invention. It is an enlarged view of A view of embodiment shown in FIG. It is the elements on larger scale which show the principal part of embodiment shown in FIG. It is an enlarged view which shows the structure and operation | movement of a fluid coupler apparatus used for embodiment shown in FIG. FIG. 5 is a B view of FIG. 4. It is explanatory drawing of the modification of a 2nd opening means. It is explanatory drawing of the modification different from FIG. 6 of a 2nd opening means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Table, 5 ... Main shaft, 5a ... Processing fluid supply passage (coolant supply passage), 10A, 10B, 10C ... Clamp device, 11 ... Fluid pressure cylinder device, 20A, 20B ... Socket, 21a ... Engagement hole, 22 ... Check valve, 24 ... first opening means, 25 ... plug, 26a ... engagement protrusion, 26b ... valve seat, 26c, 26d, 27c ... second opening means, 26c ... slit, 26d ... small hole, 27 ... Valve member, 27c ... concave groove, W ... work.

Claims (8)

A socket having an engagement hole communicated with a fluid supply destination; and a plug having an engagement projection communicated with a fluid supply source, and the engagement projection is fitted into the engagement hole in the plug. In the fluid coupler apparatus provided with the first opening means opened by combining, the fluid in the plug is ejected to the outside even when the first opening means is not opened in the plug. 2. A fluid coupler apparatus, further comprising two opening means. 2. The fluid coupler apparatus according to claim 1, wherein the first opening means is an annular valve seat formed inside a front end portion of the engaging projection, and is pressed against the valve seat by an elastic force. The valve member is separated from the valve seat against the elastic force by fitting the plug into the engagement hole and contacting a part of the socket. A fluid coupler device. 3. The fluid coupler apparatus according to claim 2, wherein the second opening means is formed at a distal end portion of the engagement protrusion where the valve seat is formed, from a radially inner edge of the valve seat to an outer edge of the valve member. A fluid coupler apparatus comprising at least one slit formed to extend to a certain position. 3. The fluid coupler apparatus according to claim 2, wherein the second opening means is formed at a position outside the outer edge of the valve member at a distal end portion of the engagement protrusion where the valve seat is formed. A fluid coupler device comprising two small holes. 3. The fluid coupler apparatus according to claim 2, wherein the second opening means includes at least one concave groove formed on a surface of the valve member that comes into contact with the valve seat. . The fluid coupler apparatus according to any one of claims 1 to 5, wherein the socket is provided with a check valve that allows a flow toward the fluid supply destination but prevents a flow in the opposite direction. A fluid coupler apparatus characterized by the above. In a processing machine comprising a main shaft in which a machining fluid supply passage communicated with a machining fluid supply source is formed, and a table in which a workpiece is clamped by a clamping device using a fluid pressure cylinder device, the table includes claims. A socket of the fluid coupler device according to any one of claims 1 to 5 is provided to communicate with the fluid pressure cylinder device, and a plug of the fluid coupler device is communicated to the main shaft with the machining fluid supply passage. A processing machine equipped with a fluid coupler device, characterized in that it can be mounted as described above. 8. A processing machine comprising the fluid coupler device according to claim 7, wherein the plug is moved closer to the socket provided on the table by moving the main shaft while the plug is attached to the main shaft, and the second The working fluid is ejected from the opening means into the engaging hole of the socket to remove foreign matter inside, and then the engaging protrusion is fitted into the engaging hole to allow the working fluid from the supply source A processing machine provided with a fluid coupler device, comprising a control device for operating the clamp device by supplying the fluid pressure cylinder device to the fluid pressure cylinder device.

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