JPH1133858A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the unclamping motion to be made individually by every hydraulic jig and to save space. SOLUTION: Hydraulic operating systems RS1-RS4 consisting of pipe lines 64, 65, 66 are furnished being connected to a plurality of work mounting jigs, and among the systems RS1-RS4 the lines 65 are left independent each other while the lines 66 are connected with one another. On a pallet a first to a fourth coupler pair CP1-CP4 as pairs of upper couplers 60A and 60B are installed in connection with the hydraulic systems RS1-RS4 on the 1:1 basis, and on a table, one lower coupler pair CP 10 as the pair of lower couplers 50A and 50B is furnished such that selectively engageable by, connectable with, and separable from the upper couplers 60A and 60B of the first to fourth coupler pair CP1-CP4, and a selector valve 36 to change over the desitination of the hydraulic oil supplied between the lower couplers 50A and 50B is furnished in a flow line unit 27 for the lower coupler pair CP10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool suitable as a machine tool such as a machining center which can use a pallet on which a hydraulic jig or the like for setting a workpiece is set on a table or the like.

[0002]

2. Description of the Related Art Conventionally, some machine tools such as a machining center can use a pallet on which a work mounting jig (hereinafter also referred to as "mounting jig") is mounted on a table. Hydraulic oil for the mounting jig is supplied from a table or the like via a pallet. In addition, there are cases where a plurality of mounting jigs as described above are mounted on a pallet and used, and among the clamping and unclamping operations of the plurality of mounting jigs, how many unclamping operations are performed particularly when mounting or removing a workpiece? There was a demand to be able to perform each of the mounting jigs individually (because if the unclamping operation was performed simultaneously for all the mounting jigs, the clamp This causes a disadvantage that the work that has been performed is inadvertently unclamped). Therefore, conventionally, an independent hydraulic operating system is formed for each of several mounting jigs that simultaneously perform an unclamping operation, and a plurality of hydraulic oil supply systems for supplying hydraulic oil to the hydraulic operating system from a table side or the like. System for each hydraulic actuation system
For example, it has been considered to provide one-to-one connection.

[0003]

However, in the above-described configuration, a plurality of pressure oil supply systems must be provided on the table side or the like.

In view of the above circumstances, an object of the present invention is to provide a machine tool capable of performing an unclamping operation or the like individually for each of several mounting jigs and realizing space saving. .

[0005]

That is, the first invention of the present invention has a table (11), and the table (1)
1) a pallet (15) on which a plurality of work mounting jigs (21) are provided so as to be freely installed is provided so as to be rotatable with respect to the table (11) and to be able to be mounted and removed;
The pallet (15) attached to the table (11) is placed on the table (11) by a predetermined indexing center axis (Q
In a machine tool (1) provided with an indexing mechanism (13) that can freely rotate at an arbitrary angle around (1), the work mounting jig is provided between the pallet (15) and the plurality of work mounting jigs (21). An unclamping channel (65) for supplying a working fluid (RT) to the unclamping side of the fixture (21), and a clamp channel (65) for supplying a working fluid (RT) to the clamping side of the work mounting jig (21). 64, 66) is connected to each of the hydraulic operating systems (RS1 to RS4).
4) are provided in a form connected to at least one work mounting jig (21) of the plurality of work mounting jigs (21). The clamp flow path (65) is independent between the plurality of fluid pressure operation systems (RS1 to RS4), and each clamp flow path (66) is independent of the plurality of fluid pressure operation systems (RS1 to RS4). Are connected to each other, and the pallet (15) has a plurality of first fluid coupler pairs (CP1 to CP1).
CP4) is connected to each of these first fluid coupler pairs (CP1-C
P4) and each of the fluid pressure operating systems (RS1 to RS4)
Each of the first fluid coupler pairs (CP1 to CP4) is provided in the form of a pair.
To CP4) connected to the fluid pressure operation system (RS1 to R4).
A first unclamping coupler (60A) connected to the unclamping channel (65) in S4);
6) and a first clamp coupler (60B) connected to the first fluid coupler pair (CP1-CP).
4) The first unclamping coupler (60A) and the first clamp coupler (60B) release the flow of the working fluid (RT) through the first unclamping coupler (60A) and the first clamp coupler (60B). Each of the plurality of first fluid coupler pairs (CP1 to CP4) has a closable flow opening / closing means (60c), and the indexing center axis (Q1)
Are arranged at an angle (α) corresponding to a predetermined indexing angle with respect to the center, and a second unclamping coupler (50A) and a second clamping coupler (50
B) and one second fluid coupler pair (CP1
0), the pallet (15) is placed on the table (11).
Between the first fluid coupler pair (CP1 to CP4) of the plurality of first fluid coupler pairs (CP1 to CP4) when the indexing position is determined at a predetermined index angle with respect to the first fluid coupler pair (CP1 to CP4). The first unclamping coupler (60A) and the first clamp coupler (60B) of the first fluid coupler pair (CP1 to CP4) are connected to the second unclamping coupler (CP10) of the second fluid coupler pair (CP10). 50A) and the second clamp coupler (50B), respectively. The first unclamping coupler (60A) of the first fluid coupler pair (CP1 to CP4) and the second fluid coupler pair (CP1 to CP4). C
P10), a second unclamping coupler (50A), a first clamping coupler (60B) of the first fluid coupler pair (CP1 to CP4), and a second fluid coupler pair (CP1).
The second clamp coupler (50B) of (0) can be engaged and connected to and separated from each other in a state where they are arranged in a corresponding manner, and the second fluid coupler pair (CP10) is connected to the second fluid coupler pair (CP10). A working fluid supply means (27) is provided in a form capable of supplying a working fluid (RT) to the second fluid coupler (CP10).
Supply of the working fluid (RT) to the second unclamping coupler (50A) side and the second clamping coupler (5).
0B).

According to a second aspect of the present invention, in the machine tool (1) of the first aspect, the first unclamping coupler (60) of each of the first fluid coupler pairs (CP1 to CP4) is provided.
A) and the first clamp coupler (60B) have the first
Each of the first coupler body (61) in which the flow path (61a) is formed, and the second unclamping coupler (50A) and the second clamping coupler (50B) of the second fluid coupler pair (CP10) include: A second coupler body (52) having a second flow path (52a) formed therein;
The first coupler bodies (61) of the fluid coupler pair (CP1 to CP4) and the second coupler bodies (52) of the second fluid coupler pair (CP10) approach each other in facing directions, and When the second coupler body (52) is at a predetermined engagement position (K
P), the second coupler body (52) is engaged with and connected to each other in the facing direction, and retreats from each other in a predetermined direction.
P) and the first fluid coupler pair (CP1 to CP4) and the second fluid coupler pair (CP10) are separated from each other by the first fluid coupler pair (C).
P1 to CP4) are positioned with respect to the second fluid coupler pair (CP10), the first fluid coupler pair (C
P1 to CP4) and the second coupler body (52) of the second fluid coupler pair (CP10).
Are arranged so as to face each other in a predetermined direction,
The second coupler body (52) includes a coupler casing (50b) formed with an engaging portion (50a) that is engageable with the first coupler body (61), and a second casing (50b). The second flow path (52
a) is formed of a channel opening / closing mechanism (50c) that can freely open and close a), and guide support means (48) that guides the coupler casing (50b) movably in the predetermined direction with respect to the table (11). ), The coupler casing (50b) being guided and supported by the guide support means (48) in the predetermined direction between the predetermined engagement position (KP) and the separation position (BP). A driving means (47) that can be moved and driven is provided.

[0007] The numbers in parentheses and the like are for convenience of indicating corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0008]

According to the first aspect of the present invention, a work mounting jig (RS) connected to one of the plurality of hydraulic operating systems (RS1 to RS4) has the above configuration. In order to perform the unclamping operation only in the step (21), the pallet (15) is indexed and positioned at a predetermined indexing angle with respect to the table (11), and the pallet (15) is mounted on the work mounting jig (21) to be unclamped. Corresponding one first
The pair of fluid couplers (CP1 to CP4) and the second pair of fluid couplers (CP10) are positioned and engaged and connected, and the working fluid supply means (27) is switched by the supply switching means (36).
By supplying the working fluid (RT) to the second unclamping coupler (50A) through the unclamping flow path (65) that is independent from each other among the plurality of fluid pressure working systems (RS1 to RS4), The working fluid (RT) is supplied only to the work mounting jig (21) on which the unclamping operation is to be performed, and only the work mounting jig (21) performs the unclamping operation. Further, by supplying the working fluid (RT) to the second clamp coupler (50B) via the working fluid supply means (27) by the switching by the supply switching means (36), a plurality of fluid pressure operation systems (RS1 to RS1) are provided. The working fluid (RT) is supplied to all the work mounting jigs (21) via the clamp flow paths (64, 66) connected between the work mounting jigs (RS4), and the unclamped state of the work mounting jigs (21) is provided. Are clamped, and those that have been clamped are maintained in the clamped state.

In the second aspect of the present invention, the pallet (15) is attached to the table (11) by first placing the coupler casing (50b) of the second fluid coupler pair (CP10) at the separation position (BP). Move it to the second
The fluid coupler pair (CP10) and the first fluid coupler pair (C
P1 to CP4) so that they do not contact carelessly. The engagement connection between the second fluid coupler pair (CP10) and the first fluid coupler pair (CP1 to CP4) moves the coupler casing (50b) after the mounting of the pallet (15) on the table (11) is completed. It is performed by driving.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing a machining center which is an example of the machine tool of the present invention, FIG. 2 is a side view showing pallets and scales used in the machining center shown in FIG. 1, and FIG. 2 as viewed from the direction of the arrow I, FIG.
Is a schematic side sectional view showing pallets, scales, tables and the like used in the machining center shown in FIG. 1, and FIG. 5 is a sectional view showing details of the upper coupler and the lower coupler shown in FIG. FIG. 6 is a view showing a separated state of the upper coupler and the lower coupler, FIG. 6 is a view showing a state where the upper coupler and the lower coupler shown in FIG. 5 are engaged, and FIG. 7 is a view showing the upper coupler shown in FIG. FIG. 8 is a diagram showing a hydraulic circuit on the standby table device side, FIG. 9 is a diagram showing a hydraulic circuit on the processing table device side, and FIG. , A schematic diagram showing the positional relationship between the upper coupler and the lower coupler, FIG. 11 is a block diagram showing the contents of a first control device on the standby table device side, and FIG. 12 is a second control device on the processing table device side That shows the contents of Tsu is a click view.

As shown in FIG. 1, a machining center 1, which is an example of a machine tool according to the present invention, has a machine main body 2 and a column 5 in the machine main body 2 in a horizontal direction (Z-axis direction). Movably in the directions of arrows A and B. The column 5 is provided with a main shaft 3 which can be driven to rotate in a freely movable manner on the column 5 in directions indicated by arrows C and D in FIG. 2 which is a vertical direction (Y-axis direction). Various tools (not shown) can be removably mounted on the. Note that the Z-axis direction and Y
The X-axis direction perpendicular to the axial direction is the horizontal arrow E or F direction as shown in FIG.

As shown in FIGS. 1 to 4, the machine main body 2 is provided with a standby table device 10 at a position on the arrow B side of the column 5. That is, the standby table device 10 is provided with a table 11 provided on the machine body 2.
The table 11 has a table lower part 11a on the machine body 2 side, a pallet support part 11b above the table lower part 11a, and a coupler mounting part 11c. Note that an indexing mechanism 13 is provided between the table lower part 11a and the pallet support part 11b, as shown in FIG.
That is, the pallet support portion 11b is rotatable and positionable about the vertical axis Q1 with respect to the table lower portion 11a via the indexing mechanism 13 (note that the table lower portion 11a and the split Since the ejecting mechanism 13 and the like are publicly known, a detailed description of the structure and drawings are omitted). Further, the coupler mounting portion 11c is formed in an annular shape so as to surround the side of the pallet support portion 11b, is fixed to the table lower portion 11a without moving, and is cut off from the pallet support portion 11b. ing. A plurality of positioning claws 11d are formed at the upper end of the pallet support 11b.

Further, as shown in FIG.
It has a known clamping device 12 for pallet clamping. That is, the clamp device 12 is provided with a clamp rod 12a projecting upward from the pallet support portion 11b side of the table 11 so as to be able to retract and a distal end of the clamp rod 12a with a T-shaped cross section. And a horizontal plate-shaped engaging member 12b. On the other hand, a pallet 15 is provided on the pallet support portion 11b so as to be positioned and attached to and removable from the table 11. That is, the pallet 15 has a substantially horizontal substantially plate-shaped pallet main body 16, and an engagement groove 16a having a T-shaped cross section is opened horizontally on the lower surface side of the pallet main body 16. It is formed in the shape of. The engaging member 12b of the clamp rod 12a is inserted and engaged with the engaging groove 16a in the horizontal direction. For example, when the pallet 15 moves closer to the engaging member 12b in the direction of arrow F in FIG. 3, the engaging member 12b can be inserted into and engaged with the engaging groove 16a. The pallet main body 16 engaged with the engaging portion 16b is pressed onto the pallet supporting portion 11b of the table 11 by pulling the engaging member 12b inserted and engaged with the engaging groove 16a downward by driving the clamp device 12. It can be fixed, clamped and mounted. A positioning groove 16b is formed on the lower surface side of the pallet main body 16, and when the pallet main body 16 is mounted, the pallet supporting portion 11b is inserted into the positioning groove 16b.
The positioning claws 11d are inserted and engaged. That is, the positioning groove 16b and the positioning claw 1
1d allows the pallet 15 to be accurately positioned with respect to the table 11. The above-described clamp device 12, the engaging groove 16a, the positioning groove 16b, and the positioning claw 11d constitute a pallet clamp mechanism 14 that allows the pallet 15 to be positioned and attached to and detached from the table 11.

On the pallet body 16 of the pallet 15,
As shown in FIGS. 2 to 4, the scale 17 is mounted. The scale 17 used in the present embodiment has a prismatic shape having a square horizontal cross section. As shown in FIGS. 2 and 3, the scale 17 has a first side 19A facing in the direction of arrow A, a second side 19B facing in the direction of arrow F, a third side 19C facing in the direction of arrow B, and an arrow E. A fourth side surface 19D facing the direction is formed. Each of these side surfaces 19A to 19
D is provided with a plurality of (four in this embodiment) work setting units 20, and each of the work setting units 20 is a work mounting jig 21 which can fix and release the work 70 to and from the work setting unit 20. One by one. Each work mounting jig 21
Is a pressing member 22 capable of pressing and fixing the work 70 arranged on the work setting portion 20 in the horizontal direction toward the scale 17 side, that is, in the direction of the arrow J in the figure, and the pressing member 22 in the direction of the arrow J It has a work fixing actuator 23 that can be driven to move in the direction indicated by arrow K in the drawing, which is the direction opposite to the direction indicated by arrow J (the direction away from scale 17). That is, the work fixing actuator 23 comprises a cylinder 23a and a piston 23b which are driven by hydraulic pressure, and a rod 23c which is connected to the piston 23b and which can be driven to move in the directions of arrows J and K. The pressing member 22
Are connected in such a manner that they can be moved and driven in the directions of arrows J and K by the rod 23c. Each pressing member 22 is provided with a temporary fixing mechanism 25 for urging and pressing the pressing member 22 in the direction of arrow J by a spring or the like.

Further, as shown in FIG.
The standby table device 1 is positioned on the arrow B side of the column 5 and on the arrow A side of the standby table device 10.
A processing table device 100 having a configuration similar to that of the processing table device 100 is provided. That is, as shown in FIG. 4, the processing table device 100 can be freely moved and driven in the horizontal direction (X-axis direction) by arrows E and F in FIG. Table 111 provided
The table 111 is provided so as to be capable of rotating and positioning around a vertical axis Q11 via an indexing mechanism 113 above the table lower part 111a on the machine main body 2 side and an indexing mechanism 113, A pallet support portion 111b having a plurality of positioning claws 11d formed at an upper end thereof, and a coupler mounting portion 111c fixedly provided on the table lower portion 111a so as to surround a side of the pallet support portion 111b. doing. Table 1
11 is a clamp rod 112a projecting upward from the pallet support portion 111b side and capable of retracting, and
It has a clamp device 112 having an engagement member 112b provided at the tip of the clamp rod 112a. On the pallet support portion 111b of the table 111, another pallet 15 configured in the same manner as the pallet 15 already described is provided so as to be capable of being positioned and attached to and removed from the table 111, as described above. Clamping device 112 on table 111 and positioning claw 11
1d, the pallet 15 side engaging groove 16a and the positioning groove 16b constitute a pallet clamp mechanism 114 that allows the pallet 15 to be positioned and mounted on and removed from the table 111.

The table 11 of the standby table device 10 has a distribution line unit 27 through which the hydraulic oil RT can be distributed as shown in FIG. The distribution line unit 27 has a first hydraulic supply line 31 connected to a hydraulic unit 30 capable of supplying hydraulic oil RT under pressure.
The primary-side pipe line 31a for supplying the hydraulic oil RT pressurized by the outside to the outside and the return oil from the outside to the hydraulic unit 3
It is composed of a secondary-side pipe line 31b for supplying 0. First
The hydraulic supply line 31 is branched at its tip end into two, a second hydraulic supply line 32 and a third hydraulic supply line 33. That is, the second hydraulic supply line 32 is connected to the pipeline 32 a and the pipeline 31 connected to the pipeline 31 a of the first hydraulic supply line 31.
b, and the third hydraulic supply line 33 is connected to the pipeline 31a of the first hydraulic supply line 31 and the pipeline 33b connected to the pipeline 31b.
Consists of Electromagnetic switching valves 35 and 36 are provided in the middle of the second hydraulic supply line 32 and the third hydraulic supply line 33, and these switching valves 35 and 36 are in the state T1,
Switching is possible between T2. Specifically, when the switching valve 35 (36) is in the state T1, the pipeline 32a (33a) connected to the pipeline 31a of the first hydraulic pressure supply line 31.
Is connected to the pipe 32a (33a) even at the end of the switching valve 35 (36), and the pipe 32b (33b) connected to the pipe 31b of the first hydraulic pressure supply line 31 is connected to the pipe even at the end of the switching valve 35 (36). It is connected to the road 32b (33b). However, when the switching valve 35 (36) is in the state T2, the line 32a (33a) connected to the line 31a of the first hydraulic pressure supply line 31 is connected to the line 32b (33b) at the end of the switching valve 35 (36). ) And the line 32b (33b) connected to the line 31b of the first hydraulic pressure supply line 31 is connected to the line 32a (33a) at the end of the switching valve 35 (36). These switching valves 35,
Beyond 36, one lower coupler pair CP10 is connected to the above-mentioned second hydraulic supply line 32 and third hydraulic supply line 33.

The lower coupler pair CP10 is composed of lower couplers 50A and 50B as shown in FIG. 4 and the like, and each lower coupler 50A and 50B is installed in the above-described coupler installation section 11c of the table 11. The lower couplers 50A, 50B, etc. shown in FIG. 4 are schematically shown and thus differ from the actual structure. Each lower coupler 50A, 5
4B, a sleeve-shaped guide body 48 extending in the directions of arrows C and D as shown in FIGS.
In a fixed form. A valve unit 52 extending in the directions of arrows C and D is provided in the guide body 48, and the valve unit 52 has a substantially cylindrical casing 50b extending in the directions of arrows C and D. . Casing 50
b, a flow path 52a penetrating the casing 50b in the directions of arrows C and D is formed.
Inside, there is provided a valve mechanism 50c configured by combining a plurality of springs, valve bodies, pins, and the like, and capable of opening and closing the flow path 52a. Note that the casing 50b is provided with the guide body 48.
The inside is provided movably in the directions of arrows C and D while being guided and supported by the guide body 48. Further, a cylinder portion 51 to which the hydraulic oil RT can be supplied is formed in the guide body 48, while the casing portion 50 b has a piston portion 5 disposed in the cylinder portion 51.
3 are formed. In other words, the piston 53 is pressed and moved in the directions of arrows C and D by the hydraulic oil RT supplied to the cylinder 51, whereby the casing 50b can be driven to move in the directions of arrows C and D. Note that the second hydraulic supply line 32
The two conduits 32a, 32b (the part ahead of the switching valve 35)
Each of the lower couplers 50A and 50B is connected to two ports of the cylinder portion 51, and when the pressurized hydraulic oil RT is supplied from the pipeline 32a, the piston 53 moves in the direction of arrow C and the pipeline 32b. When the pressurized hydraulic oil RT is supplied, the piston portion 53 is driven in the direction of arrow D.

Further, a second cylinder portion 54 to which the hydraulic oil RT can be supplied is formed in the guide body 48 near the end on the arrow D side in the drawing, and a second cylinder portion 54 in the drawing of the casing 50b is provided.
A second piston portion 55 is formed near the side end so as to be disposed in the second cylinder portion 54. That is, the second piston portion 55 is also pressed and moved in the direction of arrow C by the hydraulic oil RT supplied to the second cylinder portion 54,
Thus, the casing 50b can be driven to move in the direction of arrow C. Note that the two pipelines 33a and 33b of the third hydraulic supply line 33 (the part ahead of the switching valve 36) are connected to the lower couplers 50B and 50B, respectively.
A is connected to a port communicating with the second cylinder portion 55. The flow path 52a of each of the lower couplers 50A and 50B is open in the second piston portion 55 so as to communicate with the second cylinder portion 55.

On the other hand, the pallet body 16 of the pallet 15 mounted on the table 11 of the standby table device 10
As shown in FIGS. 4 to 7 (the upper couplers 60A and 60B shown in FIG. 4 are different from the actual structure because they are schematically shown).
A, 60B pairs of first to fourth coupler pairs CP1 to CP
P4 is provided. For example, as schematically shown in FIG. 10, four upper couplers 60 </ b> A of the first to fourth coupler pairs CP <b> 1 to CP <b> 4 are the same around the axis Q <b> 1 when indexed and rotated by the table 11 side. On the circumference, an angle α (in this embodiment, 9) which is an angle corresponding to a predetermined indexing angle.
0 degrees). Further, four upper couplers 60 of the first to fourth coupler pairs CP1 to CP4 are used.
B are also arranged on the same circumference centered on the axis Q1 at the same angular pitch of the angle α, but the position of each upper coupler 60B is shifted from each upper coupler 60A around the axis Q1 in FIG.
In the direction of arrow T (clockwise as viewed from above with respect to the axis Q1 as the direction of arrow T, and the opposite direction as the direction of arrow S).
(A sharp angle). The upper coupler 60A is separated from the upper coupler 60A by an upper coupler 60B separated from the upper coupler 60A by twice the angle α in the direction of the arrow T and by an angle β, and the first to fourth coupler pairs CP1 to CPC, respectively.
Each pair of P4 is configured. For example, in FIGS. 10 and 4, the upper couplers 60A, 60A of the first coupler pair CP1 are shown.
0B is the lower coupler pair CP1 on the table 11 side described above.
The lower couplers 50A and 50B are disposed so as to face each other vertically. Therefore, the index by the table 11 side makes the pallet 15 side the angle α (90 degrees) about the axis Q1.
As shown in FIG.
As shown in the figure, following the first coupler pair CP1, the second coupler pair CP2, the third coupler pair CP3, and the fourth coupler pair CP4.
The upper couplers 60A, 60B are lower couplers 50A, 50B.
B are sequentially arranged.

Each of the upper couplers 60A and 60B is installed on the lower surface of the pallet body 16 as shown in FIG.
The valve unit 61 has a shape extending in the directions of arrows C and D as shown in FIG. The valve unit 61 has a substantially cylindrical casing 60b extending in the directions of the arrows C and D, and the casing 60b is provided in the casing 60b with the arrows C and D.
A flow channel 61a penetrating in the direction is formed. In the casing 60b, there is provided a valve mechanism 60c configured by combining a plurality of springs, valve bodies, pins, and the like, and capable of opening and closing the flow path 61a. As shown in the engagement state of the lower coupler 50B (50A) and the upper coupler 60B (60A) in FIG. 7, an engagement portion 50a is provided near the tip of the casing 50b of the lower coupler 50B (50A) on the arrow C side.
(In this embodiment, it is a hole at the tip of the casing 50b.) Also, the upper coupler 60B (60A) has an engaging portion 60a near the tip on the arrow D side of the casing 60b (in the present embodiment, a portion near the tip of the casing 60b). Are formed, and these lower couplers 50B (50
A), when the upper coupler 60B (60A) is engaged, that is, when the casing 50b and the casing 60b are engaged, the engaging portions 50a and 60a are engaged with each other (the casing 60b is inserted into a hole at the tip of the casing 50b). Are inserted and engaged near the tip).

The lower coupler 50B (50
The valve mechanism 50c of A) and the valve mechanism 60c of the upper coupler 60B (60A) will be described.
B (50A) and the upper coupler 60B (60A) are engaged with each other by the engagement of the engagement portions 50a, 60a.
c, 60c are operated to open the flow paths 52a, 61a, respectively, and the flow paths 52a, 60a, etc.
a and 61a are connected to each other.
The lower coupler 50B (50A) and the upper coupler 60B
When the engagement of (60A) is released, the engagement portions 50a,
The valve mechanisms 50c and 60c are operated by the disengagement of the 60a, and the flow paths 52a and 61a are respectively closed. The engagement and disengagement of the lower coupler 50B (50A) and the upper coupler 60B (60A)
This is realized by the engagement and disengagement of 0a, 60a, which is realized by the movement of the casing 50b of the lower coupler 50B (50A) in the directions of arrows C and D. That is, as shown in FIG.
When it is moved to the predetermined separation position BP by being moved in the direction, the engaging portions 50a and 60a are retracted from each other in the directions of arrows C and D to be disengaged, and as shown in FIG.
When 0b is moved in the direction of arrow C and placed at the predetermined engagement position KP, the engaging portions 50a and 60a are brought closer to each other in the directions of arrows C and D and engaged.

At the upper end of the flow paths 61a, 61a of the above-described upper couplers 60A, 60B, flow paths 62A, 62B are formed so as to reach the upper surface of the pallet body 16, as shown in FIGS. , The hydraulic oil R
T is provided so as to be freely circulated, and the hydraulic oil RT can be freely circulated in a form connected to the flow passage 62A in the scale 17 installed on the pallet body 16 as shown in FIGS. The conduit 65 is connected. The pipe 65 is connected to the port 24 on the unclamping side of the cylinder 23 a of the work fixing actuator 23 of the work mounting jig 21.
a is connected so as to be able to supply hydraulic oil RT. That is, the upper coupler 60 forming the first coupler pair CP1 described above.
A is connected to the ports 24a of the plurality of workpiece fixing actuators 23 provided on the first side surface 19A of the scale 17 in the flow passage 62A corresponding to the second passage A.
The flow path 62A corresponding to the upper coupler 60A forming the coupler pair CP2 is connected to the ports 24a of the plurality of work fixing actuators 23 provided on the second side surface 19B, and the upper part forming the third coupler pair CP3. Coupler 60A
Are connected to the ports 24a of the plurality of workpiece fixing actuators 23 provided on the third side surface 19C, and correspond to the upper coupler 60A forming the fourth coupler pair CP4. The fourth
It is connected to ports 24a of a plurality of work fixing actuators 23 provided on the side surface 19D. As shown in FIGS. 4 and 8, pipes 66 through which the hydraulic oil RT can flow are connected to the inside of the towel 17 in the form of being connected to the respective flow passages 62B corresponding to the respective upper couplers 60B, as shown in FIGS. In addition, a collecting portion 66a is formed on the distal end side of each conduit 66, and all the conduits 66 are connected to each other at the collecting portion 66a. Further, a plurality (four) of pipelines 64 are connected to the collecting portion 66a so as to branch into a plurality of portions again.
Each conduit 64 is connected to a corresponding one of the clamp-side ports 24b of the cylinders 23a of the plurality of workpiece fixing actuators 23 provided on the first to fourth side surfaces 19A to 19B. Here, the pipeline 65 and the pipelines 64 and 66 connected to and connected to the plurality of workpiece fixing actuators 23 provided on the first side surface 19A constitute a hydraulic operating system RS1, and are provided on the second side surface 19B. The pipeline 65 and the pipelines 64, 66 connected to and connected to the plurality of workpiece fixing actuators 23 constitute a hydraulic actuation system RS2.
Pipes 65 and pipes 64, 66 connected to and connected to the plurality of workpiece fixing actuators 23 provided on the side surface 19C.
Constitutes a hydraulic actuation system RS3, and the conduit 65 and the conduits 64, 66 connected to and connected to the plurality of workpiece fixing actuators 23 provided on the fourth side surface 19D constitute a hydraulic actuation system RS4. I have. As described above, the pipelines 65 of the hydraulic operating systems RS1 to RS4 are independent of each other in the hydraulic operating systems RS1 to RS4.

In each of the hydraulic operating systems RS1 to RS4, a pilot check valve 57 is operatively connected in the middle of the pipe 64 by a pilot pressure from the corresponding pipe 65, as shown in FIGS. The pilot check valve 57 is connected to the hydraulic operating systems RS1 to RS4.
When the pilot pressure from the pipe line 65 does not act, the flow of the hydraulic oil RT going from the work fixing actuator 23 side to the upper coupler 60B side is closed. In each of the hydraulic operating systems RS1 to RS4, an accumulator 58 is connected between the pilot check valve 57 and the work fixing actuator 23 in the pipeline 64. In addition, each work fixing actuator 23 drives the work installation pressing member 22 in the fixing release direction (arrow K direction) by the supply of the hydraulic oil RT from the pipe 65 through the port 24 a, and the pipe 64 side. The pressing member 22 for setting the workpiece is driven in a fixed direction (the direction of the arrow J) by the supply of the hydraulic oil RT through the port 24b.

On the other hand, the distribution line unit 28 is provided on the table 111 of the processing table device 100. The distribution line unit 28 has a fourth hydraulic supply line 40 connected to the hydraulic unit 30 described above, as shown in FIGS.
Reference numeral 0 denotes a primary pipe 40a for supplying the hydraulic oil RT pressurized by the hydraulic unit 30 to the outside and a secondary pipe 40b for supplying the return oil from the outside to the hydraulic unit 30.
Consists of The fourth hydraulic pressure supply line 40 is connected to the fifth hydraulic pressure supply line 41 and the sixth hydraulic pressure supply line
There are two branches. That is, the fifth hydraulic supply line 4
1 includes a pipeline 41a connected to the pipeline 40a of the fourth hydraulic supply line 40 and a pipeline 41b connected to the pipeline 40b, and the sixth hydraulic supply line 42 is a pipeline 40a of the fourth hydraulic supply line 40. 42a and 40b connected to
Is connected to a pipe 42b. An electromagnetic switching valve 43 is provided at the end of the fifth hydraulic pressure supply line 41, and one pipe 43a is connected to the switching valve 43. That is, the switching valve 43 can be switched between the states T3 and T4. For example, in the state T3, the pipeline 41a of the fifth hydraulic supply line 41 is closed, and the pipeline 41b is connected to the pipeline 43a. In the state T4, the pipeline 41b of the fifth hydraulic supply line 41 is closed, and the pipeline 41a is connected to the pipeline 4b.
3a. In addition, a pilot relief valve 46 is connected to a distal end of the pipeline 42b of the sixth hydraulic supply line 42, and the other end of the pilot relief valve 46 is connected to the pipeline 42a. That is, when the oil pressure in the pipe 42a rises to a predetermined value, the hydraulic oil RT can return to the pipe 42b by communicating with the pipe 42b.

By the way, in the processing table device 100, a lower coupler 50B similar to the above-described lower coupler 50B of the standby table device 10 is provided in the coupler installation portion 111c of the table 111. Lower coupler 50 of standby table device 10
A corresponding to A is not provided (therefore, in the case of the processing table device 100 in FIG. 4 and the like, the lower coupler 50A side is not provided). The switching valve 43 on the fifth hydraulic supply line 41 side described above
Is connected to one port of the cylinder portion 51 of the guide body 48 of the lower coupler 50B (that is, the port of the hydraulic oil RT for pressing the piston portion 53 of the casing 50b in the direction of arrow D). Have been. Also,
The above-mentioned conduit 42a of the sixth hydraulic supply line 42 is connected to the second cylinder portion 54 of the lower coupler 50B so as to be able to supply the hydraulic oil RT (in the lower coupler 50B of the processing table device 100, the cylinder portion is provided). 51 is only one port). The pallet 15 and the scale 17 installed on the table 111 in the processing table device 100 are the same as those in the case of the standby table device 10 described above. That is, when the pallet 15 is rotated and positioned in the direction of arrow T about the axis Q11 at intervals of an angle α (90 degrees) by indexing by the table 111, as shown in FIG. Following the upper coupler 60B of CP1, the upper coupler 60B of the second coupler pair CP2, the third coupler pair CP3, and the fourth coupler pair CP4.
Are sequentially arranged corresponding to the lower coupler 50B.

Further, the machining center 1 has a first control device 120 and a second control device 151 as shown in FIGS. The first control device 120 has a main control unit 121 as shown in FIG.
1 includes an input unit 122 (such as a keyboard), a clamp control unit 123, and a first switching valve control unit 12 via a bus line.
5, the clamp detector 126, the lower coupler detector 127,
The indexing control unit 129, the second switching valve control unit 130, and the indexing completion detecting unit 131 are connected. In addition, the clamp control unit 123 is provided with the clamp device 12 of the standby table device 10.
Are connected so as to be freely driven, and the clamp detecting section 126 is connected.
Is connected to the clamp device 12 in such a manner that the completion of the clamp operation can be detected by the movement of the clamp rod 12a and the like of the clamp device 12. Also, the index control unit 129
Is operably connected to the indexing mechanism 13 of the standby table device 10, and the indexing completion detecting unit 131 is connected in such a manner as to detect the completion of the indexing operation by the movement of the indexing mechanism 13. ing. Further, the first switching valve control unit 125 and the second
The switching valve control unit 130 is connected to the switching valves 35 and 36 so that the switching valves 35 and 36 can be driven. The lower coupler detection unit 127 includes lower couplers 50A and 50B.
A and 50B are connected in such a manner that the movement of the casing 50b of the casing 50b can detect that the casing 50b has reached the separation position BP. On the other hand, the second control device 151 has a main control unit 152 as shown in FIG.
2 includes an input unit 153 (keyboard or the like), a clamp control unit 155, and a first switching valve control unit 15 via a bus line.
6, clamp detector 157, lower coupler detector 159,
The index control unit 160 and the index completion detecting unit 161 are connected. Note that the clamp control unit 155 is connected to the clamp device 112 of the processing table device 100 so as to be drivable, and the clamp detection unit 157 is connected to the clamp device 11.
The connection is made in such a manner that the completion of the clamping operation can be detected by the movement of the second clamp rod 112a and the like. The indexing control unit 160 is connected to the indexing mechanism 113 of the processing table device 100 so as to be freely drivable.
Reference numeral 61 is connected so that the completion of the indexing operation can be detected by the movement of the indexing mechanism 113. Further, the first switching valve control unit 156 is connected to the switching valve 43 so as to be drivable.
The lower coupler 50B is connected to the lower coupler detection unit 159 in such a manner that it can detect that the casing 50b reaches the separation position BP by the movement of the casing 50b of the lower coupler 50B.

Since the machining center 1 and the like are configured as described above, when machining a plurality of workpieces 70 installed on the scale 17 of the machining table device 100, the machining table device 100 is not equipped with a ball screw device or the like (not shown). 1, the column 5 is driven to move in the Z-axis direction, and the main shaft 3 mounted on the column 5 is driven to move in the Y-axis direction. Machining is performed while three-dimensionally changing the relative position between a tool (not shown) attached to the main shaft 3 and each work 70. In this processing, for example, first, as shown in FIGS. 2 and 3, the first side surface 19A of the scale 17 is positioned so as to be opposed to the main shaft 3, and the four workpieces of the first side surface 19A are positioned. The operation is performed for each of the workpieces 70 installed in the installation unit 20, and then the pallet 15 is turned by the indexing mechanism 113 of the processing table device 100 toward the arrow T.
And the second side surface 19B is positioned so as to be opposed to the main shaft 3, and each work set on the four work setting portions 20 of the second side surface 19B. 70. Thereafter, the third side surface 19C is positioned so as to be able to face the main shaft 3, and each of the works 70 set on the four work setting portions 20 of the third side surface 19C is processed.
And processing is performed in such an order that the workpieces 70 installed in the four workpiece installation sections 20 of the fourth side surface 19D are processed.

During the above-described processing, the work 70 to be processed next is set in the scale 17 on the standby table apparatus 10 side, and the processing table apparatus 100 side is set as described above. After the completion of the machining in the step S1 and the installation of the work 70 in the standby table device 10, the pallet 15 of the processing table device 100 and the pallet 15 of the standby table device 10 are exchanged by the pallet changer 67. I do. In this way, the processing on the new work 70 installed in the processing table device 100 is performed in the same procedure as described above, and the processed work 70 is removed from the standby table device 10 side, and a new work to be processed is performed. The work 70 is set. The processing for the plurality of workpieces 70 proceeds according to the procedure described above.

When the pallet is replaced, the pallet 15 is mounted and removed between the standby table device 10 and the processing table device 100. For example, as shown in FIGS. 1 and 3, the pallet 15 is mounted on the standby table device 10 (the processing table device 100) by moving the pallet 15 toward the table 11 (111) by a pallet changer 67 or the like, in the direction of arrow F. To the clamping device 12 (1) on the table 11 (111) side.
12) The engaging member 12b (112b) is inserted and engaged with the engaging groove 16a of the pallet 15. Next, as shown in FIG. 4, the pallet main body 16 is moved downward by driving the clamp rod 12a (112a) downward in the clamp device 12 (112), and the table 11 (11
On the pallet supporting portion 11b (111b) of 1), the positioning is performed via the positioning claws 11d (111d) and the positioning grooves 16b, and the pallet is fixed by clamping.

When the pallet 15 is mounted,
In the first control device 120 (the second control device 151),
The worker inputs the pallet 15 via the input unit 122 (153).
Command for executing the mounting operation of the main control unit 1
21 (152) via the clamp controller 123 (15
5) and transmitted to the clamp controller 123 (155).
Accordingly, the clamp device 12 (112) is driven to perform the above-described clamp operation. In addition, as for the standby table device 10, the first control device 120
, The main control unit 121 receiving the command from the input unit 122 transmits the switching valve 3 via the first switching valve control unit 125.
5 to state T2. This allows each lower coupler 50
As shown in FIG. 5, the casings 50b of A and 50B are moved and driven in the direction of arrow D to reach the separation position BP. (Also, regarding the processing table device 100, the second
In the control device 151, the main control unit 152 that has received the command from the input unit 153 drives the switching valve 43 to the state T4 via the first switching valve control unit 156. As a result, the casing 50b of the lower coupler 50B is driven to move in the direction of arrow D as shown in FIG. Therefore, the pallet 15 is moved to the table 11 (11
1) When positioned and mounted on the side, the upper couplers 60A, 60B on the pallet 15 and the lower couplers 50A, 50B at the separation position BP do not come into contact with each other. Lower coupler 50
A and 50B are not easily damaged.

On the other hand, after the positioning and mounting of the pallet 15 described above, the standby table device 10 is moved to the first position.
In the control device 120, the clamp detection unit 126 detects the completion of the clamping of the pallet 15 and thus the completion of the positioning and mounting, and this detection signal is transmitted to the main control unit 121, and the switching valve 35 is controlled via the first switching valve control unit 125. Drive to state T1. As a result, the casing 50b of each of the lower couplers 50A and 50B is driven and moved in the direction of arrow C to reach the engagement position KP as shown in FIG. 7, and the casing of the upper couplers 60A and 60B arranged at the corresponding position. 6
0b via the engaging portions 50a and 60a. (Also, in the processing table device 100, in the second control device 151, the clamp detection unit 157
The completion of the clamping of No. 5 and thus the completion of the positioning and mounting are detected, and this detection signal is transmitted to the main control unit 152 to drive the switching valve 35 to the state T3 via the first switching valve control unit 156. Thereby, the casing 50b of the lower coupler 50B
, The driving force in the direction of arrow D disappears, and the hydraulic pressure applied to the second cylinder portion 54 of the lower coupler 50B via the conduit 42a of the sixth hydraulic supply line 42 through the second piston portion 55 The casing 50b is driven to move in the direction of arrow C as shown in FIG.
It reaches the position P and engages with the casing 60b of the upper coupler 60B arranged at the corresponding position via the engaging portions 50a, 60a. Thus, the lower couplers 50A, 5A
0B and the upper couplers 60A, 60B are engaged after the positioning and mounting of the pallet 15 to the table 11 (111) is completed.
1 (111) does not have to be performed at the same time as the positioning and mounting operation. Therefore, the positioning and mounting operation can be performed without concern for the engagement connection of the coupler, and thus is simplified. Further, after the pallet 15 is positioned and attached to the table 11 (111), that is, the lower couplers 50A and 50B and the upper coupler 60
After the A and 60B are opposed to each other at the correct positions, the casing 50b of the lower couplers 50A and 50B is connected to the guide body 48.
And the lower couplers 50A, 50B and the upper couplers 60A, 60B are engaged and connected to each other, so that the connection positions of these couplers are not shifted, and the connection of the couplers is securely performed. It can be carried out. As described above, on the standby table device 10 side, the drive unit 47, which is a drive unit for driving the casing 50b of each of the lower couplers 50A and 50B in the directions of arrows C and D, includes the cylinder unit 51 and the piston unit 53. , The distribution line unit 27, the first switching valve control unit 125 of the first control device 120, and the like. On the processing table device 100 side, the casing 50 of the lower coupler 50B is provided.
The drive unit 47, which is a drive unit for driving b in the directions of arrows C and D, includes a cylinder unit 51, a piston unit 53,
The second cylinder unit 54, the second piston unit 55, the flow line unit 28, the first switching valve control unit 156 of the second control device 151, and the like are configured.

The removal of the pallet 15 in the standby table device 10 is performed by the first control device 120.
An operator inputs a command to execute the removal operation of the pallet 15 via the input unit 122, and the main control unit 1 receives the command.
21 drives the switching valve 35 to the state T2 via the first switching valve control unit 125. Thereby, each lower coupler 50A,
The casing 50b of 50B has an arrow D as shown in FIG.
In the direction to reach the separation position BP, so that the engagement with the upper couplers 60A and 60B is released.
On the other hand, the lower coupler detection unit 127 detects each lower coupler 50A,
The arrival of the casing 50b of 50B at the separation position BP is detected, and this detection signal is transmitted to the main control unit 121. Upon receiving the detection signal, the main control unit 121
The pallet 15 is unclamped by driving the clamp device 12 through the pallet 3. (Also, the removal of the pallet 15 in the processing table device 100 is performed by the operator in the second control device 151 inputting a command to execute the removal operation of the pallet 15 via the input unit 153, and receiving the command. The unit 152 drives the switching valve 43 to the state T4 via the first switching valve control unit 156. Thereby, the casing 50b of the lower coupler 50B is driven to move in the direction of arrow D as shown in FIG. The lower coupler detecting section 159 detects the arrival of the lower coupler 50B at the separation position BP of the casing 50b, and the detection signal is used as the main control signal. Transmitted to the unit 152 and the clamp control unit 1
55 to drive the pallet 1
5 is performed. 1) After the completion of the unclamping, as shown in FIGS. 1 and 3, the pallet 15 is moved from the table 11 (111) in the direction of arrow E by the pallet changer 67 or the like, and the clamping device 12 on the table 11 (111) side is moved. (112) engaging member 12b (11
The pallet 15 is removed from the table 11 (111) in such a manner that 2b) is pulled out from the engaging groove 16a of the pallet 15.

When the pallet 15 is installed on the standby table device 10 (the processing table device 100), the indexing operation is performed by rotating the pallet 15 at the time of processing or standby. At this time, the standby table device 10
On the side, the first control device 120 inputs an indexing operation start command and an indexing angle via the input unit 122. The main control unit 121 that has received the command drives the switching valve 35 to the state T2 via the first switching valve control unit 125. Thereby, the casing 50b of each lower coupler 50A, 50B
Is driven and moved in the direction of arrow D as shown in FIG. 5 to reach the separation position BP. That is, the lower coupler 50A,
50B and upper couplers 60A and 60B are disengaged and separated. On the other hand, the lower coupler detection unit 127 detects that each of the lower couplers 50A and 50B has reached the separation position BP of the casing 50b, and the detection signal is transmitted to the main control unit 121. Upon receiving the detection signal, the main control unit 121 drives the indexing mechanism 13 via the indexing control unit 129 based on the indexing angle and the like input by the input unit 122, and moves the pallet 15 side to the table 11 Rotate to the side to index. After the completion of the indexing, the indexing completion detecting unit 131
Detects the completion of the indexing operation by the indexing mechanism 13, and this detection signal is transmitted to the main control unit 121. The main controller 121 that has received the detection signal drives the switching valve 35 to the state T1 via the first switching valve controller 125. As a result, the casing 50b of each of the lower couplers 50A and 50B is driven to move in the direction of arrow C as shown in FIG. That is, the lower couplers 50A, 50B and the upper couplers 60A, 60B are engaged. (In addition, on the processing table device 100 side, in the second control device 151, a command for starting an indexing operation, an indexing angle, and the like are input via the input unit 153. Upon receiving the command, the main control unit 152 receives the second command. The switching valve 43 is set to the state T4 via the switching valve control unit 156.
Drive. As a result, the casing 50b of the lower coupler 50B is driven to move in the direction of arrow D as shown in FIG. That is, the lower coupler 5
OB and the upper coupler 60B are disengaged and separated.
On the other hand, the lower coupler detecting section 159 detects that the lower coupler 50B has reached the separation position BP of the casing 50b, and the detection signal is transmitted to the main control section 152. Upon receiving the detection signal, the main control unit 152 drives the indexing mechanism 113 via the indexing control unit 160 based on the indexing angle and the like input by the input unit 153, and moves the pallet 15 side to the table 111. Rotate to the side to index. After the completion of the indexing, the indexing completion detecting unit 161 operates the indexing mechanism 1
13 detects completion of the indexing operation, and the detection signal is transmitted to the main control unit 152. Upon receiving the detection signal, the main controller 152 switches the switching valve 43 through the first switching valve controller 156.
To the state T3. Thereby, the casing 50b of the lower coupler 50B is connected to the pipeline 4 of the sixth hydraulic supply line 42.
As shown in FIG. 7, it is driven and moved in the direction of arrow C by the oil pressure from 2a to reach the engagement position KP. That is, the lower coupler 50B and the upper coupler 60B are engaged. )
As described above, since the lower couplers 50A and 50B at the separation position BP do not contact the upper couplers 60A and 60B at the time of the indexing operation, it is convenient that damage due to careless contact does not occur.

In the machining center 1 of this embodiment, the standby table device 10 (the processing table device 10) is used.
In (0), the work mounting jig 21 is normally maintained in a clamped state in each work setting section 20 of the scale 17. That is, on the standby table device 10 side, normally, the switching valve 36 is connected to the second switching valve controller 13 of the first controller 120.
0, the state T1 is maintained, whereby the flow path 52a of the lower coupler 50B is connected to the pipe 33 connected thereto.
A pressurized hydraulic oil RT is supplied through the line a. Therefore, the lower couplers 50A and 50B and the upper coupler 6
0A, 60B (the above-described first to fourth coupler pairs CP1 to CP
4 may be any pair of upper couplers 60A, 60B)
When the upper coupler 60B is engaged and connected,
Is supplied to the pipeline 66 connected to the upper coupler 60B and the plurality of pipelines 64 connected via the collecting portion 66a of the pipeline 66. Oil RT is supplied. By this, Ikeru 1
7, the rods 23c of all the work fixing actuators 23 on the first to fourth side surfaces 19A to 19D are driven (or driven and maintained) in the direction of arrow J in FIG.
The workpiece mounting jig 21 is maintained in a clamped state.
Thereafter, the lower couplers 50A and 50B and the upper coupler 6
In a case where all of the upper couplers 60A and 60B are separated from each other (for example, at the time of removing or indexing the pallet 15 described above), the lower couplers 50A and 50B and all the upper couplers 60A and 60B are separated. Since the flow paths 52a, 61a are closed (thereby, the lower couplers 50A, 50B
And no oil leak from the upper couplers 60A and 60B), the hydraulic oil RT between each upper coupler 60A and each work fixing actuator 23, and each upper coupler 60
Hydraulic oil RT between B and each work fixing actuator 23 is blocked, so that all the work fixing actuators 23 on the first to fourth side surfaces 19A to 19D of the scale 17 are closed.
At this time, the pressure for pressing the piston 23b is maintained, the rod 23c of the work fixing actuator 23 is urged and maintained in the direction of the arrow J in FIG. 4, and the work mounting jig 21 of each work setting section 20 is maintained in a clamped state. You. In this manner, the work mounting jig 21 of the scale 17 is prevented from being carelessly unclamped and the work 70 is prevented from shifting or moving, which is convenient.

Also, on the processing table device 100 side,
Normally, pressurized hydraulic oil RT is supplied to the flow path 52a of the lower coupler 50B via a pipe 42a connected thereto. Therefore, when the lower coupler 50B and the upper coupler 60B are engaged and connected (any pair of the upper couplers 60B among the above-described first to fourth coupler pairs CP1 to CP4 may be engaged), the engaged upper coupler 60B is pressed. Hydraulic oil RT is supplied, and the hydraulic oil RT is pressurized to a pipeline 66 connected to the upper coupler 60B and to a plurality of pipelines 64 connected through a collecting portion 66a of the pipeline 66.
Is supplied. Thus, all the work fixing actuators 2 on the first to fourth side surfaces 19A to 19D of the scale 17 are formed.
The third rod 23c is driven (or driven and maintained) in the direction of arrow J in FIG. 4, and the work mounting jigs 21 of the respective work setting sections 20 are maintained in a clamped state. After that, when both the lower coupler 50B and the upper coupler 60B are separated (for example, the pallet 15 described above).
The lower coupler 50B
And the flow paths 52a, 6 of all the upper couplers 60A, 60B.
1a is closed (this allows the lower coupler 5
0B and no oil leakage from the upper couplers 60A and 60B), the hydraulic oil RT between each upper coupler 60A and each work fixing actuator 23, and each upper coupler 60A.
Hydraulic oil RT between B and each work fixing actuator 23 is blocked, so that all the work fixing actuators 23 on the first to fourth side surfaces 19A to 19D of the scale 17 are closed.
, The pressure for pressing the piston 23b is urged and maintained, and the work mounting jig 21 of each work setting section 20 is maintained in a clamped state. In this way, the work mounting jig 21 of the scale 17 is inadvertently unclamped and the work 70
It is convenient that displacement or movement is prevented. As described above, after all the workpiece mounting jigs 21 of the scale 17 are in the clamped state,
Lower couplers 50A, 50B and upper couplers 60A, 60B
Are separated from each other, the work mounting jigs 21 do not enter the unclamped state.
When the pallet 15 on which the pallet 15 is mounted is transferred between the standby table device 10 and the processing table device 100, the clamp state is maintained, which is convenient.

On the side of the stand-by table device 10, when the work 70 is removed and installed from the scale 17, the work for unclamping the work mounting jig 21 is performed (that is, the work is performed). The work 70 is removed and installed using the above-described temporary fixing mechanism 25 in a state where the mounting jig 21 is unclamped). In the machining center 1 of the present embodiment, each side surface 19A of the scale 17 is formed.
The workpiece mounting jig 21 can be selectively unclamped every 19D. For example, as described above, when all the work mounting jigs 21 of the scale 17 are in the clamp state, the k-th side surface 19K of the scale 17 is set.
(The k-th is any of the first, second, third, and fourth, and 1
9K is any one of 19A, 19B, 19C, and 19D). In this case, the above-described indexing operation is first performed in the standby table device 10, and the k-th coupler pair CPn (k-th coupler) is transmitted to the lower couplers 50A and 50B.
Is any of the first, second, third and fourth, and CPn
Is any of CP1, CP2, CP3, CP4)
And the upper couplers 60A and 60B are engaged and connected. Next, in the first control device 120, the input unit 122
Input the unclamping command. The command is transmitted to the second switching valve control unit 130 via the main control unit 121, and based on this, the second switching valve control unit 130 drives the switching valve 36 to the state T2. As a result, the pressurized hydraulic oil RT is supplied to the flow path 52a of the lower coupler 50A via the pipeline 33b connected thereto, and the k-th coupler pair CPn connected to the lower coupler 50A is thus supplied. Upper joint 60A and the work mounting jig 2 of the k-th side surface 19K connected to the upper coupler 60A via a conduit 65.
The pressurized hydraulic oil RT is also supplied to the cylinder 23a of the first work fixing actuator 23. Thereby, the rod 23c of the work fixing actuator 23 is driven in the direction of the arrow K in FIG. 4, and the work mounting jig 21 on the k-th side surface 19K is unclamped. As a result, the pilot check valve 57 on the pipe line 64 connected to the work fixing actuator 23 is driven to flow on the pipe 64 side, and the hydraulic oil RT flows from the other port 24b of the cylinder 23a of the work fixing actuator 23. It is discharged through a conduit 64). In this case, the lower coupler 50
Since the pressurized hydraulic oil RT is not supplied to the other pair of upper couplers 60A that are not connected to A (that is, since the space between the upper coupler 60A and the work fixing actuator 23 is closed). On the other side of the scale 17 corresponding to the upper coupler 60A, the pilot check valve 57 is not driven and the pipeline 64 is closed. Therefore, in the other aspect, the space between the work fixing actuator 23 and the pilot check valve 57 is closed,
The piston 23b in the work fixing actuator 23
Is maintained, the rod 23c of the work fixing actuator 23 is maintained in the direction of the arrow J in FIG. 4, and the work mounting jigs 21 of the work setting sections 20 are maintained in a clamped state.

As described above, the k-th side 1 of the scale 17
To unclamp only the 9K work mounting jig 21 and remove and install the work 70, and to clamp the work mounting jig 21 again on the k-th side surface 19K, the first control device 120 requires an input. A clamp command is input via the unit 122. The command is transmitted to the second switching valve control unit 130 via the main control unit 121, and the second switching valve control unit 130 drives the switching valve 36 to the state T1. Accordingly, the pressurized hydraulic oil RT is supplied to the flow path 52a of the lower coupler 50B via the pipe line 33a connected thereto, and the upper coupler 60B connected to the lower coupler 50B.
Is supplied with pressurized hydraulic oil RT. Further, the line 66 connected to the upper coupler 60B and the line 6
The pressurized hydraulic oil RT is supplied to a plurality of pipelines 64 connected via the sixth collecting portion 66a. This allows
The rods 23c of all the work fixing actuators 23 on the first to fourth side surfaces 19A to 19D of the scale 17 are driven (or maintained in the driven state) in the direction of arrow J in FIG.
The work mounting jig 21 on the k-th side surface 19K is clamped. Of course, the work mounting jig 21 on the other side is also maintained in the clamped state. As described above, the work 70 can be mounted and removed while clamping and unclamping the work mounting jigs 21 on the individual k-th side surface 19K. That is, since the work mounting jig 21 can be held on the side where the work 70 is not attached or detached while the clamped state of the work 70 is maintained, the work attachment jig 21 on the side where the work 70 is not attached or detached is careless. Inconveniences such as displacement, movement and drop of the work 70 due to unclamping are eliminated.

In the above-described embodiment, the machining center 1 is shown as an example of the present invention. However, the machine tool of the present invention is not limited to the machining center but may be any other machine tool that uses a pallet on the table side. Any type of machine tool is acceptable. In the embodiment described above, the lower couplers 50A and 50B and the upper couplers 60A and 60B
Although shown as an example of the unclamping coupler, the second clamping coupler, the first unclamping coupler, and the first clamping coupler, the configurations of the first and second unclamping couplers and the first and second clamping couplers are the same as those of the first embodiment. Other than those shown in the embodiments are possible. In the above-described embodiment, the lower coupler 50B is provided on the processing table device 100 side.
The drive unit 47 for moving and driving the casing 50b includes a second cylinder portion 54 and a second piston portion 55 on the side of the casing 50b driven by hydraulic pressure in the second cylinder portion 54 (this is a cylinder). This is an attempt to reduce the space by using a single conduit connected to the section 51). However, the drive unit 47 on the processing table device 100 side is connected to the lower coupler 5 on the standby table device 10 side.
The configuration may be the same as that of the drive unit 54 for 0A and 50B. In the present embodiment, the drive unit 47, which is a drive unit for driving the coupler casing, is of a hydraulic type, but may be of another type such as a mechanical type employing a rack and pinion gears. . Further, in the above-described embodiment, the four first to fourth coupler pairs CP1 to CP4, which are the first fluid coupler pairs, are arranged on the pallet 15 side, but the number of the first fluid coupler pairs is arbitrary. is there. Also,
The arrangement of the upper couplers 60A and 60B forming each pair may be arranged in a form other than the above-described embodiment as long as it can correspond to the lower couplers 50A and 50B.

[0039]

As described above, the first invention of the present invention has a table such as a table 11 on which a plurality of work mounting jigs such as a work mounting jig 21 can be freely set. A pallet such as the pallet 15 is provided so as to be rotatable and attachable / removable with respect to the table, and the pallet attached to the table is provided on the table with a predetermined indexing center axis such as an axis Q1. In a machine tool provided with an indexing mechanism such as an indexing mechanism 13 which can freely rotate at an arbitrary angle, a hydraulic oil is provided between the pallet and the plurality of work mounting jigs on the unclamping side of the work mounting jig. Hydraulic operation including an unclamping flow path such as a pipe 65 for supplying a working fluid such as RT and a clamp flow path such as a pipe 64 and 66 for supplying a working fluid to the clamp side of the work mounting jig. A plurality of fluid pressure operating systems such as RS1 to RS4 are provided in such a manner that each fluid pressure operating system is connected to at least one work mounting jig among the plurality of work mounting jigs. , Each unclamping flow path is independent between the plurality of hydraulic pressure operating systems, and each clamping flow path is connected to each other between the plurality of hydraulic pressure operating systems, A plurality of first fluid coupler pairs, such as four coupler pairs CP1 to CP4,
Each of these first fluid coupler pairs and each of the fluid pressure operating systems are provided in a one-to-one connection, and each of the first fluid coupler pairs is connected to the fluid connected to the first fluid coupler pair. A pair of a first unclamping coupler such as an upper coupler 60A connected to an unclamping flow path of a pressure-operated system and a first clamp coupler such as an upper coupler 60B connected to a clamping flow path is provided. The first unclamping coupler and the first clamp coupler of the fluid coupler pair respectively include flow opening / closing means such as a valve mechanism 60c that can freely open and close the flow of the working fluid through the first unclamping coupler and the first clamp coupler. The plurality of first fluid coupler pairs are arranged and arranged at an angle such as an angle α corresponding to a predetermined indexing angle around the indexing central axis, and the lower coupler 50A and the like are arranged on the table. No. 2 Clamp coupler and the lower coupler 50
When the pallet is indexed and positioned at a predetermined indexing angle with respect to the table, the lower fluid coupler pair such as the lower coupler pair CP10, which is a pair of second clamp couplers such as B, is formed. One of the plurality of first fluid coupler pairs
Between the two first fluid coupler pairs, the first unclamping coupler and the first clamping coupler of the first fluid coupler pair are the second unclamping coupler and the second clamping coupler of the second fluid coupler pair. And a first unclamping coupler of the first fluid coupler pair, a second unclamping coupler of the second fluid coupler pair, and a first clamp coupler of the first fluid coupler pair. And the second clamp coupler of the second fluid coupler pair are engageable and connectable to each other in a state where they are arranged in a corresponding manner,
A working fluid supply unit such as a flow line unit 27 is provided so as to supply the working fluid to the second fluid coupler pair, and the working fluid supply unit supplies the working fluid to the second fluid coupler pair. Is provided with supply switching means such as a switching valve 36 which can be switched between the second unclamping coupler side and the second clamping coupler side. Thus, for example, when all the work mounting jigs are in the clamped state, the unclamping operation is performed only on the work mounting jig connected to one of the plurality of fluid pressure operating systems. Is to index and position the pallet at a predetermined indexing angle with respect to the table, and to form a first fluid coupler pair and a second fluid coupler pair corresponding to a work mounting jig to be unclamped. The working fluid is supplied to the second unclamping coupler through the working fluid supply means by switching by the supply switching means. As a result, the working fluid is supplied only to the work mounting jig which should perform the unclamping operation through the independent unclamping flow paths between the plurality of hydraulic operating systems, and only the work mounting jig is unclamped. A clamping operation can be performed. As described above, in the present invention, the unclamping operation can be performed individually for each of several work mounting jigs connected to one of the plurality of fluid pressure operating systems. Good. Further, in the present invention, each of the first fluid coupler pairs of the plurality of first fluid coupler pairs on the pallet side is moved relative to one second fluid coupler pair on the table side such as indexing operation. The pallet side is provided with a plurality of hydraulic pressure operating systems for operating the work mounting jig, but the table side is Has a structure in which only one working fluid supply means, which is a supply system for supplying a working fluid to one second fluid coupler pair, is provided. Therefore, it is not necessary to provide a plurality of supply systems on the table side or the like, and the space can be saved by that much.

According to a second aspect of the present invention, in the machine tool of the first aspect, the first unclamping coupler and the first clamping coupler of each of the first fluid coupler pairs include a flow path 61a and the like inside. Valve unit 61 in which the first flow path is formed
And the like, and the second unclamping coupler and the second clamping coupler of the second fluid coupler pair include a valve unit 52 in which a second flow path such as a flow path 52a is formed. The first coupler body of the first fluid coupler pair and the second coupler body of the second fluid coupler pair approach each other in facing directions, and The two coupler bodies are engaged and connected at a predetermined engagement position such as the engagement position KP, and receded from each other in the facing direction so that the second coupler body is positioned at the predetermined separation position such as the separation position BP. And the first fluid coupler pair and the second fluid coupler pair,
When the first fluid coupler pair is positioned with respect to the second fluid coupler pair, each first coupler body of the first fluid coupler pair and each second coupler of the second fluid coupler pair The casing is arranged such that the main body is opposed to the main body in a predetermined direction, and the second coupler main body is formed with an engaging portion such as an engaging portion 50a which is engageable with the first coupler main body. And a valve mechanism 50 provided in the coupler casing and capable of opening and closing the second flow path.
c, etc., having a guide support means such as a guide body 48 that guides the coupler casing movably in the predetermined direction with respect to the table with the coupler casing. A drive means is provided which is movable in the predetermined direction between the predetermined engagement position and the separation position while being guided and supported by the guide support means. Therefore, in the present invention, in addition to the effect of the first invention, the mounting of the pallet on the table is
First, the coupler casing of the second fluid coupler pair is moved to the separation position so that the second fluid coupler pair and the first fluid coupler pair are not inadvertently brought into contact with each other. Thus, when positioning and mounting the pallet on the table, an inconvenience such that the second fluid coupler pair and the first fluid coupler pair are inadvertently contacted and damaged is prevented.
Further, the engagement and connection between the second fluid coupler pair and the first fluid coupler pair are performed by moving and driving the coupler casing after the mounting of the pallet to the table is completed. And the mounting operation is simplified. Further, after the pallet is positioned and mounted on the table, that is, after the second fluid coupler pair and the first fluid coupler pair are arranged opposite to each other at correct positions, the coupler casing is guided and engaged by the guide supporting means. Since the engagement and connection with the second fluid coupler pair are performed by moving to the position, the connection of the couplers can be reliably performed without shifting the connection positions of the couplers. Further, the second fluid coupler pair or the like does not require a floating mechanism or the like, so that space can be saved. Further, since only the coupler casing needs to be moved and driven when the couplers are engaged and connected (that is, it is necessary to move and drive the entire second unclamping coupler and the second clamp coupler of the second fluid coupler pair). Therefore, the driving means for the movement drive and the space for the movement drive can be reduced accordingly. That is, space saving can be realized by this as well.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a machining center as an example of a machine tool according to the present invention.

FIG. 2 is a side view showing pallets, scales, and the like used in the machining center shown in FIG. 1;

FIG. 3 is a view taken in the direction of the arrow I in FIG. 2;

FIG. 4 is a schematic side sectional view showing a pallet, a scale, a table, and the like used in the machining center shown in FIG. 1;

FIG. 5 is a sectional view showing details of an upper coupler and a lower coupler shown in FIG. 4, and is a diagram showing a separated state of the upper coupler and the lower coupler.

FIG. 6 is a diagram showing a state in which an upper coupler and a lower coupler shown in FIG. 5 are performing an engagement operation.

FIG. 7 is a diagram illustrating an engaged state of the upper coupler and the lower coupler illustrated in FIG. 5;

FIG. 8 is a diagram illustrating a hydraulic circuit on a standby table device side.

FIG. 9 is a diagram showing a hydraulic circuit on the processing table device side.

FIG. 10 is a schematic diagram illustrating a positional relationship between an upper coupler and a lower coupler.

FIG. 11 is a block diagram showing the contents of a first control device on the standby table device side.

FIG. 12 is a block diagram showing the contents of a second control device on the processing table device side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Machine tool (machining center) 11 ... Table 13 ... Indexing mechanism 15 ... Pallet 21 ... Work mounting jig 27 ... Working fluid supply means (distribution line unit) 36 ... Supply switching means (switching valve) 47... Driving means (drive unit) 48... Guide supporting means (guide body) 50 A... Second unclamping coupler (lower coupler) 50 B... Second clamping coupler (lower coupler) 50 a. ... Coupler casing (casing) 50c channel opening / closing mechanism (valve mechanism) 52 second coupler body (valve unit) 52a second channel (channel) 60A first unclamping coupler (top) Coupler 60B First clamp coupler (upper coupler) 60c Flow opening / closing means (valve mechanism) 61 First coupler body (valve unit) 61a Channel (channel) 64 Clamp channel (channel) 65 Unclamp channel (channel) 66 Clamp channel (channel) CP1 Coupler for first fluid (first coupler) Pair) CP2 ... First fluid coupler pair (second coupler pair) CP3 ... First fluid coupler pair (third coupler pair) CP4 ... First fluid coupler pair (fourth coupler pair) CP10 ... Second fluid coupler pair (lower coupler pair) KP ... engagement position BP ... separation position Q1 ... indexing central axis (axis) RS1 ... fluid pressure operation system (hydraulic operation system) RS2 ... fluid pressure Actuation system (hydraulic actuation system) RS3 ... Fluid pressure actuation system (hydraulic actuation system) RS4 ... Fluid pressure actuation system (hydraulic actuation system) RT ... Fluid (hydraulic oil) α ... Angle (corresponding to indexing angle) angle)

Claims (2)

[Claims] 1. A pallet having a table, on which a plurality of workpiece mounting jigs are provided so as to be freely installed, is provided so as to be rotatable with respect to the table, and is capable of being attached and detached from the table. A machine tool provided with an indexing mechanism that can freely rotate the pallet mounted on the table around a predetermined indexing center axis, wherein the work mounting is performed between the pallet and the plurality of work mounting jigs. An unclamping flow path for supplying working fluid to the unclamping side of the jig, and a fluid pressure working system including a clamp flow path for supplying working fluid to the clamping side of the work mounting jig, A plurality of the plurality of work mounting jigs are provided so as to be connected to at least one work mounting jig. Are independent of each other, and the clamp flow paths are connected to each other between the plurality of fluid pressure operating systems. The pallet is provided with a plurality of first fluid coupler pairs, A fluid coupler pair and each of the fluid pressure operating systems are provided in a one-to-one connection, and each of the first fluid coupler pairs is provided by the fluid pressure operating system connected to the first fluid coupler pair. A pair of a first unclamping coupler connected to the unclamping flow path and a first clamp coupler connected to the clamping flow path, wherein the first unclamping coupler and the first clamp of each of the first fluid coupler pairs The coupler releases the flow of the working fluid through the first unclamping coupler and the first clamping coupler.
Each of the plurality of first fluid coupler pairs has a flow opening / closing means that can be closed, and the plurality of first fluid coupler pairs are arranged and arranged at an angle corresponding to a predetermined indexing angle around the indexing central axis. One second fluid coupler pair comprising a pair of a second unclamping coupler and a second clamping coupler,
When the pallet is indexed and positioned at a predetermined indexing angle with respect to the table, the first pallet and the first fluid coupler pair of the plurality of first fluid coupler pairs are connected to the first fluid coupler pair.
A first unclamping coupler and a first clamping coupler of the fluid coupler pair are provided so as to correspond to the second unclamping coupler and the second clamp coupler of the second fluid coupler pair, respectively; A first unclamping coupler of the coupler pair, a second unclamping coupler of the second fluid coupler pair, a first clamp coupler of the first fluid coupler pair, and the second
The second clamp couplers of the pair of fluid couplers can be engaged and connected to each other in a state where they are arranged in a corresponding manner, and can be separated from each other, and the working fluid supply means can supply working fluid to the pair of second fluid couplers. The working fluid supply means is provided with supply switching means capable of switching supply of the working fluid to the second fluid coupler pair between the second unclamping coupler side and the second clamp coupler side. Machine tool composed of A first unclamping coupler and a first clamping coupler of each of the first fluid coupler pairs each having a first coupler body having a first flow path formed therein; The second unclamping coupler and the second clamping coupler of the coupler pair each have a second coupler main body in which a second flow path is formed, and each of the first coupler main body of the first fluid coupler pair and the second coupler main body. 2
The respective second coupler bodies of the fluid coupler pair approach each other in the facing direction, the second coupler bodies are engaged and connected at a predetermined engagement position, and retreat from each other in the facing direction,
The second coupler main body is located at a predetermined separation position and can be separated, and each of the first fluid coupler pair and the second fluid coupler pair is such that the first fluid coupler pair is When positioned with respect to the second fluid coupler pair, each first coupler body of the first fluid coupler pair and each second coupler body of the second fluid coupler pair are arranged to face each other in a predetermined direction. The second coupler body is provided with an engaging portion capable of engaging with the first coupler body, and the second casing provided in the coupler casing. The coupler casing is formed of a channel opening / closing mechanism that can freely open and close the channel, and has guide support means for movably guiding the coupler casing in the predetermined direction with respect to the table. Guy by support means 2. The machine tool according to claim 1, further comprising a drive unit which is movable between the predetermined engagement position and the predetermined separation position in the predetermined direction in a supported manner.