JP2508878B2 - Fluid supply device for pallet changer jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a plurality of pallets to which jigs for positioning and fixing a workpiece are attached, one of which is separated and reciprocates with a processing machine. The present invention relates to a fluid supply device in a movable work automatic supply device (hereinafter referred to as a pallet changer).

[Conventional technology]

Generally, when machining a workpiece with a machine tool, the machining time required for the workpiece is the installation time for positioning and fixing the workpiece on the machine tool, the net machining time for machining the workpiece, and the machining of the machined workpiece. It consists of the take-out time to take out from the machine, and in order to reduce this, for example, while machining one workpiece, other unmachined workpieces are attached to the jig, or machined workpieces are removed from the jig. Is being done.

In consideration of such a work form, for example, there is a pallet changer having a plurality of pallets to which an automatic jig is attached, and a workpiece is positioned and fixed on one pallet of the pallet changer and sent to a machine tool for machining. There is.

That is, one of the plurality of pallets is separated from the pallet changer and transferred to the machining table of the machine tool, and the workpiece attached to the jig is machined by the machine tool. The other pallets are located on the standby side for setting up the workpiece. A workpiece is placed on the automatic jig of the pallet located on the standby side of this pallet changer, and pressure oil or compressed air from the power source is supplied from the outside to the actuator of the automatic jig via a coupler or the like. By doing so, the workpiece is positioned and fixed on the automatic jig. After that, when the machining of the workpiece on the pallet transferred to the machine tool is completed, the pallet on the machine tool side is returned to the pallet changer side, and instead, the pallet to which the workpiece is attached on the standby side is Separated from the pallet changer and moved to the machining table of the machine tool,
Machining such as cutting has been performed on new workpieces. Then, the workpiece that has been processed and returned to the standby side is released from the pallet by releasing the fixing by supplying pressure oil or the like from the power source to the actuator of the automatic jig through the coupler. It was

[Problems to be Solved by the Invention]

However, since the pallet with the workpiece attached moves separately from the pallet changer between the standby side of the pallet changer and the machining table of the machine tool, a coupler is attached to the actuator of the automatic jig that attaches and detaches the workpiece to the pallet. It is necessary to supply / shut off pressure oil, etc. from an external power source via an external power source, and the work of attaching / detaching the actuator and coupler is required. Therefore, there is a problem that the equipment cost increases, the work replacement time increases, and the process time increases.

Furthermore, since the automatic jig for the pallet is disconnected from the pallet changer during machining of the workpiece with the machine tool, the power source is disconnected from the actuator of the automatic jig during machining, and the fixing force to the actuator is fixed. May not be held reliably.

As a function of the pallet changer to cope with such a problem, the standby side and the machine tool side separately control the supply / interruption of pressure and the like from the power source and perform the parallel work on the standby side and the machine tool side. In addition, it is required to widen the machining range of the workpiece corresponding to the movement and rotation of the workpiece set in the automatic jig on the pallet in various directions.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to perform control separately on the standby side and the machine tool side, and to cope with movement and rotation of the pallet in various directions. It is an object of the present invention to provide a fluid supply device for a jig of a pallet changer that can widen the processing range of a product.

[Means for solving the problem]

In order to achieve the above object, the present invention relates to a pallet changer that reciprocates a pallet on which a workpiece is attached via a jig to and from a processing table of a processing machine, and the pallet changer is connected to a fluid supply source through a pipe. An inflow side block having a plurality of pipe connection ports, and an outflow side block having a plurality of pipe connection ports that communicate with the connection ports of the inflow side block via individual flow paths, A swivel center manifold in which the inflow side block and the outflow side block are fitted concentrically with the swivel center of the rotary table of the pallet changer so as to be relatively rotatable, and a fixing member for supporting and fixing the outflow side block of the swivel center manifold. A pair of a pair of members, which are arranged on both sides of the fixed member so as to face each other, are provided on the rotary table, and are movable from the rotary table separately from the rotary table Via a flow path separately to each of the jigs, jigs respectively provided on the pair of pallets, an inflow side block having a plurality of pipe connection ports on both sides, and the connection ports of the inflow side block. And an outflow side block having a plurality of communication ports on the bottom surface communicating with each other,
The outflow block is fitted inside the inflow block concentrically with the center of rotation of the pallet so as to be rotatable relative to each other, and a pair of jig manifolds respectively provided in the above jigs and on both sides of the fixing member. Multiple input ports that are fixed to each other and connected to the communication ports of multiple pipelines on the outflow side block of the swivel center manifold via piping, and multiple outputs that communicate with multiple input ports on both sides. A pair of relay manifolds each having a port, and a jig manifold and a relay manifold that face and support the inner wall surface, and are configured to be able to follow the movement and rotation operations of the jig in various directions and to be horizontal. One end is connected to each of a pair of endless steel belts that are arranged, and multiple output ports on both sides of each relay manifold. The other end is connected to the connection ports of the plurality of pipes on both sides of the pipe, and the plurality of flexible pipes supported on the inner wall surface of the steel belt and the plurality of pipes of the outflow side block of each jig manifold. It is provided with a plurality of pipes that respectively connect the communication port of the road and the plurality of connection ports on the operating device side provided in each pallet jig.

[Work]

In the present invention, one of the plurality of pallets is moved to the processing machine side by the turning of the rotary table, separated from the rotary table, transferred onto the processing table of the processing machine, and moved to that position. The work piece positioned and fixed on the jig of the pallet is processed by the processing machine.

At this time, the pallet on the processing table of the processing machine follows the movement and rotation of the processing table in various directions, and moves and rotates in various directions integrally with the processing table. In addition, the piping system from the fluid supply source to the jig does not interfere with the swiveling motion of the processing table of the processing machine or movement in various directions, moves following the movement of the processing table, and is always connected. Fluid is supplied to the jig in the closed state.

Then, when the machining of the workpiece by the machining machine is completed, the pallet in which the machined workpiece is positioned and fixed is returned from the machining machine to the pallet changer, and then the rotary table is swiveled. On the processing machine side,
On the other hand, the pallet on the processing machine side moves to the standby side. At this time, the fluid can be independently supplied from the fluid supply source to each jig through the swivel center manifold without any trouble.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a swirl center manifold, which has an inflow side block composed of a tubular housing 2 and a fluid side block composed of a swivel shaft 3. The cylindrical housing 2 is fitted around the swivel shaft 3 and is rotatable relative to each other. A large number of annular grooves 4 are formed in the inner peripheral surface 2A of the cylindrical housing 2, and each annular shape The connection port 5 of one conduit communicates with the groove 4. As a result, the cylindrical housing 2 has a plurality of pipe connection ports 5 connected to the power source (fluid supply source). At the connection port 5 of each pipeline,
The pipes 10 (shown in FIG. 1) to which the oil from the power source is supplied are connected to each other.

The swivel shaft 3 has a cylindrical housing 2 along its axial direction.
The same number of different channels 6 as the number of the annular grooves 4 are formed, and one end of each channel 6 communicates with each annular groove 4. Each flow path 6 is independent and does not merge or branch. In addition, the other end of each flow path 6 has a bottom flange of the swivel shaft 3.
Each of them communicates with one of the communication ports 7 of the plurality of pipelines facing the outer peripheral surface of 3B.

The bottom flange 3B of the swivel shaft 3 of the swivel center manifold 1 is supported and fixed to the center of the top of a fixing member composed of a plate-shaped splash guard 8. The splash guard 8 is fixed to the rotary table 9 of the two-sided pallet changer 100. The rotary table 9 is installed concentrically with the center of rotation of the swivel center manifold 1 and located on the base B of the two-sided pallet changer 100 within a range of 180 degrees. It is supported so that it can freely reciprocate.

A first pallet 11A having the first automatic jig 11 attached thereto and a second pallet 12A having the second automatic jig 12 attached thereto are provided on the rotary table 9. These first and second pallets 11A, 12A are Machine tools are arranged facing each other on both sides of the splash guard 8 and separated from the rotary table 9, respectively.
It is possible to move to 101 side.

Reference numeral 13 is a first jig manifold provided in the first automatic jig 11, 14 is a second jig manifold provided in the second automatic jig 12, and has the same structure as that of the swivel center manifold 1. The first jig manifold 13 is a connection port for a plurality of pipelines.
A swivel shaft 13A having on the bottom surface an inflow side block consisting of a cylindrical housing 13B having 3C on both side surfaces 13E, 13E and a plurality of conduit connection ports 13D communicating separately with the connection port 13C via a flow path.
The outflow side block is composed of an outflow side block, and the outflow side block is concentrically fitted in the inflow side block concentrically with the turning center of the first pallet 11A.

On the other hand, the second jig manifold 14 communicates with the inflow side block composed of the cylindrical housing 14B having the connection ports 14C of the plurality of conduits on the both side surfaces 14E, 14E through the separate flow paths of the connection ports 14C. It has an outflow side block consisting of a rotating shaft 14A having a plurality of conduit connection ports 14D on the bottom surface, and the outflow side block is fitted in the inflow side block concentrically with the turning center of the second pallet 12A so as to be relatively rotatable. I will do it.

The first automatic jig 11 has the pivot shaft 13A of the first jig manifold 13, and the second automatic jig 12 has the second jig manifold 1
The four swivel shafts 14A have their axes centered on the first and second pallets.
11A and 12A are fixedly installed so as to coincide with the center of rotation (the center of rotation of the machining table 101A of the machine tool 101).

A tubular housing 13B of the first jig manifold 13, and
An endless first steel belt 15 is provided between the splash guard 8 and the tubular housing 13B and the splash guard 8 at two positions facing each other. On the other hand, the endless second steel belt 16 is also provided between the tubular housing 14B of the second jig manifold 14 and the splash guard 8.
It is provided in the same manner as the first steel belt 15 described above. In other words, the steel belts 15 and 16 respectively support the jig manifolds 13 and 14 and the relay manifolds 15A and 16A on the inner wall surface, and move and rotate the jigs 11 and 12 in various directions. It is configured to be able to follow and is arranged horizontally. Each of the steel belts 15 and 16 has an elliptical shape when viewed on a plane when it is located on the rotary table 9, and is freely bent while maintaining a certain rigidity in the diametrical direction.

A plurality of pipes 17 are connected to the communication ports 7 of the pipe lines of the turning shaft 3 of the turning center manifold 1, respectively.
17 is the splash guard 8 of each steel belt 15,16
Is connected to a pair of relay manifolds 15A and 16A fixed at the position of the mounting portion. A pair of relay manifolds 1
5A and 16A are respectively fixed to both sides of the splash guard 8, and are connected to the plurality of input ports connected to the connecting ports 7 of the plurality of pipe lines of the swivel shaft 3 of the swivel center manifold 1 through the pipes 17, and to both side surfaces. It has a plurality of output ports each communicating with a plurality of input ports.

One ends of the plurality of first and second flexible pipes 18, 19 are connected to the plurality of output ports on both side surfaces of the relay manifolds 15A, 16A, respectively, and the plurality of first, second flexible pipes 18, The other end of 19 is the cylindrical housing 13A, 1 of each jig manifold 13,14.
Connection ports 13C, 1 for multiple conduits on both sides 13E, 13E, 14E, 14E of 4B
4C, and the plurality of first and second flexible pipes 18 and 19 are supported on the inner wall surfaces of the steel belts 15 and 16.

On the first automatic jig 11, a plurality of actuating devices including a first actuator 20 for positioning and fixing the workpiece W ₁ are provided, and a plurality of connection ports (not shown) on the first actuator 20 side are provided. ) Is connected to the communication ports 13D of the plurality of conduits of the first jig manifold 13 via the plurality of fixed pipes 21 and the manifold 22, respectively.

On the other hand, on the second automatic jig 12, a plurality of actuating devices including a second actuator 23 for positioning and fixing the workpiece W ₂ are provided, and a plurality of connection ports (not shown) on the second actuator 23 side are provided. ) Is connected to the communication ports 14D of the plurality of conduits of the second jig manifold 14 via the plurality of fixed pipes 24 and the manifold 25, respectively. Hydraulic cylinders are adopted as the first actuator 20 and the second actuator 23, and the rods of the hydraulic cylinders operate to position and fix the workpieces W ₁ and W ₂ with respect to the automatic jigs 11 and 12. The cancellation is done.

 Next, the operation of this embodiment will be described.

FIG. 1 shows a state in which the second pallet 12A is located at a position facing the machining table 101A of the machine tool 101 of the rotary table 9, and the first pallet 11A is located at the standby side. From this state, the first automatic jig 11 of the workpiece W ₁ is moved according to the movement of the first pallet 11A located on the standby side.
The operation up to installation, processing, and removal will be described in detail. Here, since the turning center manifold 1 has the connection ports 5 and the communication ports 7 for a plurality of pipelines, the first pallet 11 on the standby side is provided.
Pressure oil is independently supplied to the first jig 11 on A and the second jig 12 on the second pallet 12A on the machine tool side, and control is performed separately.

First, the first pallet 11A on the standby side
The work W ₁ is placed on the automatic jig 11. On the other hand, the second pallet 12A has the machine tool 1 as shown by the chain line in FIGS.
Transferred to the processing table 101A of 01, the second pallet 12A
Workpiece W ₂ (second
(See the drawing) is machined by the spindle 101B of the machine tool 101.

In this state, when pressure oil is supplied to the connection port 5 of the required pipe line of the cylindrical housing 2 of the swivel center manifold 1, the pressure oil flows through the flow channel 6 to the communication port 7 of the pipe line of the swivel shaft 3. Really
Further, it reaches the first jig manifold 13 from the relay manifold 15A through the first flexible pipe 18, and from the first jig manifold 13 through the fixed pipe 21 to the first pallet 11A on the standby side. The first actuator 2 of the first automatic jig 11
Supplied to 0. By the operation of the first actuator 20, the workpiece W ₁ is positioned and fixed to the first automatic jig 11 on the standby side.

In this state, when the machining of the workpiece W ₂ positioned and fixed to the second automatic jig 12 of the second pallet 12A by the machine tool 101 is completed, the second pallet 12A moves from the machining table 101A of the machine tool 101 to the pallet changer. 100 turntable 9
Return to top.

Next, when the rotary table 9 is rotated 180 degrees, the first pallet 11A on the standby side, on which the first automatic jig 11 for positioning and fixing the workpiece W ₁ is placed, moves to the turning center manifold 1
It moves to the opposite side centering on and reaches the machine tool 101 side.
On the other hand, the second pallet 12A having a second automatic jig 12 are positioned and fixed a workpiece W ₂ completing the processing is moved to the standby side. Pressure oil is supplied from the second actuator 23 of the second automatic jig 12 to the power source through the fixed pipe 24, the second jig manifold 14, the second flexible pipe 19, the relay manifold 16A, the swivel center manifold 1 and the like. returned to the workpiece W ₂ is the second
Since the clamp by the automatic jig 12 is released, replacement work with a new workpiece is performed.

Then, the first pallet 1 moved to the machine tool 101 side
1A is pushed toward the machining table 101A of the machine tool 101 by the operation mechanism provided on the rotary table 9, and the first pallet 11A moves away from the pallet changer 100 and transfers to the machining table 101A of the machine tool 101. 1st pallet 1
First jig manifold integrated with 1A first automatic jig 11
A fixed side 13 and a movable side 13 of the first pallet 11 are rotatable relative to the first automatic jig 11 at the center of rotation of the first pallet 11 (the center of rotation of the processing table 101A), and the first flexible pipe 18 rotates. Since it is connected to the central manifold 1 side, it can freely move while maintaining the above-mentioned connected state as the machining table 101A of the machine tool 101 rotates and moves in various directions such as the X-axis and Y-axis directions. Follow and move. here,
The first and second steel belts 15 and 16 follow various movements and rotations of the pallets 11A and 12A of the processing table 101A and the jigs 11 and 12 in the X-axis and Y-axis directions.

According to the above configuration, since the swing center manifold 1 is provided at the swing center of the pallet changer 100, the rotation of the rotary table 9 causes the first pallet 11A and the second pallet 12A to swing around the swing center manifold 1. As a result, even when turning from the standby side to the machine tool 101 side, it is possible to keep the power source always connected to the actuators 20 and 23 of the first automatic jig 11 and the second automatic jig 12.

Moreover, since the swirl center manifold 1 has the connection ports 5 for a plurality of pipelines and the communication ports 7 for a plurality of pipelines, the first automatic jig 11 and the processing machine side are placed on the first pallet 11A on the standby side. The pressure oil can be independently supplied to the second automatic jig 12 on the second pallet 12A, and control can be performed separately.

Then, in that state, the first pallet 11A and the second pallet 12
When A moves away from the pallet changer 100 and moves onto the machining table 101A of the machine tool 101, each actuator 20, 23 of the first automatic jig 11 of the first pallet 11A and the second automatic jig 12 of the second pallet 12A The first jig manifold 13 and the second jig manifold 14 connected to the
8, Since it is connected to the swivel center manifold 1 via the second flexible pipe 19, the workpieces W ₁ and W ₂ rotate (spin) on the machining table 101A of the machine tool 100, or X, Y. Even if it moves in the axial direction, the first flexible pipe 18 and the second flexible pipe 19 will not move due to the movement.
Moves following each other, and the piping system of pressure oil to the jig does not hinder the movement of the processing table 101A. Therefore, unlike the conventional example, the first and second automatic jigs 11 and 12 of the first and second pallets 11A and 12A that move from the pallet changer 100 to the machine tool 101 side,
There is no need to separate the power source from 12, and pressure oil is constantly supplied to the actuators 20 and 23 of the first and second automatic jigs 11 and 12, so that force is reliably applied to the actuators 20 and 23.
The workpieces W ₁ and W ₂ can be firmly positioned and fixed to the jigs 11 and 12 for the first and second pallets.

Further, the first and second automatic jigs 11 and 12 are provided with first and second jig manifolds 13 and 14, respectively, and the first and second jig manifolds 13 and 14 are provided with a plurality of conduits. The inflow side block consisting of the cylindrical housings 13B and 14B having the connection ports 13C and 14C, and the outflow side comprising the swivel shafts 13A and 14A having the communication ports 13D and 14D of the plurality of pipelines communicating with the connection ports 13C and 14C. Block and pallet 1
Since the first and second pallets 11A and 12A are fitted so as to be rotatable relative to each other concentrically with the turning center of the 1A and 12A, there is no limitation on the rotation angle of the first and second pallets 11A and 12A.

Further, regardless of the positions of the first and second pallets 11A and 12A, the pressure oil from the power source is supplied to the actuators 20 and 23 of the first and second automatic jigs 11 and 12, respectively. As a result, it is possible to eliminate the coupler attachment / detachment work described in the conventional example, and as a result, the replacement time of the workpieces W ₁ and W ₂ can be reduced by the coupler attachment / detachment time described in the conventional example. Therefore, the process time can be shortened, and a special operation mechanism such as a robot for attaching and detaching the coupler can be eliminated.

In addition, in the present embodiment, the turning center manifold 1
Is composed of an inflow-side block composed of the tubular housing 2 and an outflow-side block composed of the swirl side 3, but the structure of the swirl center manifold is not limited to this structure. 1 may be turned upside down to be composed of an inflow side block composed of the swivel shaft 3 and an outflow side block composed of the tubular housing 2.

Further, in the present embodiment, the turning center manifold 1
Is fixed to the pallet changer 100 and the splash guard 8 on the rotary table 9, but the present invention is not limited to this, and the swing center of the arm and the like extended from the machine tool 101 should be aligned with the swing center of the rotary table 9. You may attach it.

Further, in this embodiment, the first actuator 2
Although a hydraulic cylinder is used as the second actuator 23, the second actuator 23 is not limited to this and may be a pneumatic cylinder. Then, although the first actuator 20 and the second actuator 23 are given as examples of the actuating device, the actuating device is not limited to the actuator, and may be applied to, for example, a valve operated by pilot pressure.

In addition, in the present embodiment, the turntable 9 is also provided.
An example in which the invention is applied to a two-sided pallet changer provided with a pair of pallets 11A and 12A is shown above, but the invention can also be applied to a multi-sided pallet changer in which the number of pallets is three or more.

Further, in the present embodiment, it is applied to the case where pressure oil is supplied from a power source as a fluid supply source to a jig to fix a workpiece to the jig or to release the fixation. However, compressed air is supplied from a compressor etc. as a fluid supply source to the air injection nozzle provided in the jig,
It can also be applied to a cleaning air supply device that removes cutting scraps on a workpiece or a jig. It can also be applied to a coolant device that supplies a cutting agent and a coolant from a coolant supply source to a tool during machining of a workpiece via a jig.

In addition, in the present embodiment, a machine tool is given as an example of the processing machine, but the present invention is not limited to this and can be applied to, for example, a welding machine.

〔The invention's effect〕

As described above, according to the present invention, since the swing center manifold is provided at the swing center of the pallet changer, the pallet on the rotary table swings around the swing center manifold by the rotation of the rotary table of the pallet changer. As a result, even if the apparatus moves by turning from the standby side to the processing machine side, it is possible to keep the fluid supply source always connected to the operating device of the jig on the pallet.

Moreover, since the swirl center manifold has connection ports for multiple pipelines, fluid is independently supplied to the jig on the pallet on the standby side and the jig on the pallet on the processing machine side for control. Can be done separately.

Then, when the pallet leaves the pallet changer and moves to the processing table of the processing machine in that state, the jig manifold connected to the operating equipment on the pallet is
Connected to the swivel center manifold via flexible piping,
Moreover, since the turning center is provided so as to coincide with the turning center of the pallet, the jig and the pallet are flexibly supported for the movement even if the jig and the pallet are swung and moved in various directions on the processing table of the processing machine. When the pallet moves from the pallet changer to the processing machine side without the movement of the processing table following the movement of the members and flexible pipes, the fluid from the jig on the pallet changer is changed as in the conventional example. There is no need to disconnect the source.

Therefore, since the fluid from the fluid supply source can be constantly supplied from the pallet changer side to the operating device of the jig on the pallet during processing of the workpiece by the processing machine, the fixing force of the operating device can be reliably retained. Thus, it is possible to properly perform the operation of the operating device such as the work on the pallet on the pallet can be firmly positioned and fixed by the operating device.

Further, the jig is provided with a plurality of jig manifolds, and the jig manifold includes an inflow-side block having a plurality of conduit connection ports and a plurality of conduit communication ports communicating with the connection ports. Since the outflow-side block is concentrically fitted with the center of rotation of the pallet so as to be rotatable relative to each other, there is no limit to the rotation angle of the pallet.

Further, unlike the conventional example, it is possible to eliminate the work of attaching and detaching the coupler that connects the working device of the jig on the pallet and the fluid supply source. As a result, it is possible to reduce the number as much as possible, to shorten the process time, and to provide a device at low cost without requiring a special operation mechanism for attaching and detaching the coupler.

[Brief description of drawings]

FIG. 1 is a perspective view of a power source supply device in a movable component automatic supply jig according to an embodiment of the present invention. FIG. 2 is a side view of the power source supply device in the movable component automatic supply jig. FIG. 3 is a plan view of a power source supply device in the movable component automatic supply jig. FIG. 4 is a vertical cross-sectional view of the turning center manifold of FIG. [Explanation of symbols of main parts] 1 ... Swirl center manifold 2 ... Cylindrical housing 3 ... Swivel axis 5 ... Pipe passage connection port 6 ... Flow passage 7 ... Pipe passage connection port 8 ... Splash guard 9 …… Rotary table 11 …… First automatic jig 11A …… First pallet 12 …… Second automatic jig 12A …… Second pallet 13 …… First jig manifold 14 …… Second cure Tool manifold 15 …… First steel belt 16 …… Second steel belt 18 …… First flexible pipe 19 …… Second flexible pipe 20 …… First actuator 23 …… Second actuator 21,24 ...... Fixed piping 100 ...... Pallet changer 101 …… Machine tool 101A …… Machining table.

Claims (1)

(57) [Claims] 1. A pallet changer for reciprocating a pallet on which a workpiece is attached via a jig to and from a processing table of a processing machine, in which a plurality of pipe connection ports are connected to a fluid supply source via piping. An inflow side block having an inflow side block and an outflow side block having a plurality of communication passages of pipelines communicating with the connection ports of the inflow side block via individual flow paths, respectively, and the inflow side block and the outflow side block Is a swivel center manifold that is concentrically fitted with the swivel center of the rotary table of the pallet changer and is rotatable relative to each other, a fixing member that supports and fixes the outflow-side block of the swivel center manifold, and both sides of the fixing member that face each other. And a pair of pallets that are arranged on the rotary table and are movable from the rotary table to the processing table. Each jig provided in the inlet, an inflow side block having connection ports of a plurality of conduits on both side surfaces, and a plurality of communication with the connection ports of the inflow side block via separate flow paths, respectively. And an outlet side block having a communication port of the pipeline on the bottom surface, and the outlet side block is fitted inside the inlet side block concentrically with the center of rotation of the pallet so as to be rotatable relative to each other. And a pair of jig manifolds that are respectively installed on the two sides of the fixing member, and a plurality of jig manifolds that are fixed to both sides of the fixing member and that are connected to the communication ports of the plurality of conduits of the outflow side block of the turning center manifold through piping. A pair of relay manifolds each having an input port and a plurality of output ports that communicate with a plurality of input ports on both sides, and a jig manifold and a relay manifold are opposed to and supported on the inner wall surface. A pair of endless steel belts that are horizontally arranged and configured to follow the movement and rotation of the jig in various directions, and one end of each is connected to a plurality of output ports on both sides of each relay manifold. A plurality of flexible pipes, the other ends of which are connected to the connection ports of a plurality of conduits on both sides of the inflow side block of each jig manifold, and which are supported on the inner wall surface of the steel belt, and each jig. Fluid supply in the jig of a pallet changer equipped with a plurality of pipes that respectively connect the communication ports of a plurality of pipelines on the outflow side block of the manifold and the plurality of connection ports on the operating device side provided on each pallet jig apparatus.