JPH0659598B2 - Transfer machine - Google Patents

Description

The present invention relates to a transfer machine.

(Prior Art) As a transfer machine in which a large number of processing units are linearly arranged, long columns are provided in parallel on both sides of a linear transfer path for intermittently feeding a workpiece at a constant pitch. It is known that each of the columns has a processing unit attached inward. When changing the lot, it is necessary to replace the pallet jig for mounting the workpiece, but the pallet jig for replacement is stored in a storage place apart from the transfer machine.

(Problems to be Solved by the Invention) In a conventional transfer machine, since two rows of processing units are arranged to face each other and a workpiece is transferred between them, it is difficult to replace the processing blade. However, there is a problem in that it is necessary to provide an extra space to increase the installation area. In addition, since the conventional transfer machine does not have a storage area for pallet jigs for exchange and an automatic pallet jig exchange device, when changing lots, the machine stand must be stopped for a long time to manually exchange pallet jigs. Or was processed by another transfer machine.

According to the present invention, processing units are attached to both front and back surfaces of a column in one row so that the work circulates around the processing units, which makes it easy to replace the processing blade and reduce the installation area. It is intended to provide a transfer machine capable of automatically replacing a pallet jig when changing.

(Means for Solving the Problems) The present invention has a large number of processing units arranged on both front and back surfaces of a horizontally long column at a constant pitch, and a pallet fixing jig for workpiece mounting on both front and back surfaces of the column. A guide rail for the tool is provided, and the pallet jigs are arranged on the jig guide rail at a pitch equal to the arrangement pitch of the processing unit and so that adjacent ones are in contact with each other. On the end side, a shuttle guide rail that extends between the ends of the front and back jig guide rails is provided.The shuttle guide rail reciprocates between the front and back jig guide rails, and the jig guide is provided at one end of the shuttle guide rail. A shuttle for mounting the pallet jig extruded from the rail and transporting it to the other end is provided for one end of the guide rail for the front side and for the jig on the back side. The pallet jigs conveyed by the shuttles to the other ends of the guide rails are pushed out by the arrangement pitch on the jig guide rails and transferred onto the jig guide rails, and the pallet jigs on the jig guide rails are pushed out. A jig feeding means for intermittently feeding the tools at each arrangement pitch is provided, and the pallet jigs are stored in a multi-row and multi-stage manner above the shuttle guide rails on one end side and the other end side of the column. A jig storage unit that can be used is provided, and at one end of this jig storage unit, jig transfer means for transferring the pallet jig extruded to the shuttle at one end of the lower shuttle guide rail to the jig storage unit, At the other end of the jig accommodating portion, jig ejecting means for ejecting the pallet jig of the jig accommodating portion and transferring it to the other end of the shuttle guide rail is provided.

(Operation) In the above invention, the pallet jigs corresponding to the front and back row processing units are arranged on the front and back row jig guide rails, respectively, and one end side of the column Pallet jigs are placed on the shuttle guide rail and the shuttle guide rail on the other end,
As a whole, the number of pallet jigs, which is two more than the number of processing units, is arranged around the column. When the workpieces attached to the pallet jigs of the front and back jig guide rails and the back jig are processed by the corresponding processing units, the front and back jig feeding means The pallet jig of the guide rail for the jig on the front row works together with the pallet jig on the guide rail for the shuttle on one end side of the column, and the pallet jig of the guide rail for the jig on the back row on the other end side of the shuttle. The pallet jigs on the shuttle guide rails are transferred one pitch at a time together with the pallet jigs on the guide rails, and the pallet jigs on the shuttle guide rails on one end are moved to one end of the jig guide rails on the front row. The pallet jig on the other end of the rail is transferred to the shuttle on the guide rail for shuttle on the other end, and the pallet jig on the guide rail for shuttle on the other end is attached to the other end of the guide rail for jig in the back row. Is, pallet jig one end of the jig guide rails of the back row are transferred to shuttle on the guide rail for one side shuttle. Then, the shuttles on the one end side and the multi-end side are respectively driven so that the one end side shuttle is from the back row jig guide rail side to the front row jig guide rail side, and the other end side shuttle is the front row jig. The pallet jigs are conveyed from the guide rail side to the jig guide rails in the back row, and then the shuttle on one end faces the pallet jig on the front side and the shuttle on the other end lining the pallet jig in the back row. Only the shuttle is restored, leaving each side. By repeating this process, the workpieces of the pallet jigs are sequentially processed by the processing units. When performing setup changes due to lot changes, two types of pallet jigs are prepared according to the workpiece, one of which is placed on the jig guide rails on the front and back of the column and the shuttle guide rails on both ends, and the other. Are stored in advance in the jig storage section. Then, the pallet jigs extruded from the jig guide rails on the back row onto the shuttles on one end side are sequentially stored one by one at the end portions on the back row side of the one-side jig storage portion by the jig transfer means. The pallet jigs at the front row side end portions of the jig accommodating portions are sequentially taken out one by one by the jig take-out means and transferred to the front row side end portions of the shuttle rail guide rails on one end side. Similarly, the pallet jigs extruded from the jig guide rails on the front row onto the shuttles on the other end side are sequentially stored one by one at the front row side end portion of the other end side jig storage section by the jig transfer means. At the same time, the pallet jigs at the ends on the back row side of the jig accommodating portion are sequentially taken out one by one by the jig take-out means and transferred to the ends on the back row side of the shuttle rail guide rail on the other end side. The pallet jig lowered onto the shuttle guide rail is pushed out to the jig guide rail by the jig feeding means and sequentially processed by the processing unit.

(Embodiment) In FIG. 1, a column 1 is formed long in the up-down direction of the paper surface, and a large number of processing units 2 are arranged at equal intervals on both front and back surfaces (both left and right in the figure). A pair of left and right guide rails 3, 3 and 4, 4 are laid linearly on the front side and the back side of the column 1, and the pallet jig 5 is arranged on each of the guide rails 3, 4 in the same pitch as the machining unit 2. And are arranged in close proximity to each other. Further, a pair of shuttle guide rails 7 and 8 for the shuttle 6 for carrying the pallet jig 5 are provided on one end side (upper side in the drawing) and the other end side of the column 1, respectively.
Are provided at right angles over the ends of the jig guide rails 3 and 4 on the front and back sides, and the guide rails 3, 4, 7, and 8 are provided.
Forms a rectangular transport path for the pallet jig 5 around the column 1.

The pallet jig 5 has a rectangular plate shape as shown in FIGS. 2 and 3, and is slidably fitted to the jig guide rails 3 and 4 at both left and right edges thereof. It has a guide groove 5a, and push rods 5b project from both front and rear ends.
The distance between the tips of b and 5b is equal to the arrangement pitch of the processing units 2. Then, on the upper surface of the pallet jig 5, columns 11 are erected at four positions in front, back, left and right.
A small protrusion 11a is provided at the tip of 11. On the other hand, on the lower surface, circular protrusions are arranged along the straight line connecting the front and rear columns 11, 11 arranged on the left side and the straight line connecting the front and rear columns 11, 11 arranged on the right side.
Four 12 are projected, and small holes 12a into which the small projections 11a at the upper ends of the columns are fitted are formed in the circular projections 12 at the front and rear ends. When the pallet jigs 5 are vertically stacked, the lower pallet jigs 5 The upper end small projection 11a of the column 11 is adapted to fit into the small hole 12a in the lower surface of the upper pallet jig 5. Further, holes 5c are formed in the four corners of the pallet jig 5, and bushes 5d are inserted and fixed from the lower side into the holes 5c.

The lower left shuttle 6 in FIG. 1 and its shuttle guide rail 8 are shown in FIGS. 4 and 5. As shown in FIG. 4, the shuttle 6 is formed in a rectangular plate shape having a size such that four circular projections 12 at the center of the lower surface of the pallet jig 5 can be placed on the upper surface of the shuttle 6. There are two guide grooves 6a and 6b for guiding the circular projection 12 in the vertical direction and the horizontal direction, respectively.
While both ends of are open to allow passage of the circular protrusion 12,
The left end of the lateral guide groove 6b is closed and the right end of the guide groove 6b is opened to allow only the right passage of the circular protrusion 12. On the other hand, on the lower surface of the shuttle 6, as shown in FIG.
A pair of legs 6c, 6c are provided so as to correspond to, and the shuttle guide rail 8 is slidably inserted into the hole formed in the leg 6c. The transmission chain 13 in which the middle portions of the legs 6c and 6c are stretched in parallel between the shuttle guide rails 8 and 8
And driving the transmission chain 13 causes the shuttle 6 to move along the shuttle guide rail 8 at one end of the column 1 on the front and back jig guide rails 3, 4 respectively.
It is designed to reciprocate between the ends.

An intermediate guide plate is provided between the other end of the jig guide rail 3 in the front row and the other end side shuttle guide rail 8 for the shuttle 6.
14 are installed. This intermediate guide plate 14 is provided with two guide grooves 14a for guiding the circular projection 12 on the lower surface of the pallet jig 5 in the vertical direction and one guide groove 14b for guiding the horizontal direction in the upper surface thereof. The vertical guide groove 14a is open at both ends to allow passage of the circular projection 12, and the horizontal guide groove 14b is open only at its right end to allow passage of the circular projection 12 rightward. ing. An end guide plate 15 is installed on the opposite side of the shuttle guide rail 8 on the other side so as to face the intermediate guide plate 14. The end guide plate 15 has a guide groove 15a for laterally guiding the circular projection 12, and the guide groove 15a corresponds to the vertical guide groove 14a of the intermediate guide plate 14 and is divided into two left and right sides. Two circular projections 12 on the left and right are opened and closed at the location and the right end, and come and go between the shuttle 6 and the circular projection 12 to the right. That is, among the eight circular projections 12 on the lower surface of one pallet jig 5, the central four circular projections 12 are the intersections of the vertical guide grooves 6a, 6a and the lateral guide grooves 6b, 6b of the shuttle 6. Located in
Two circular protrusions 12 on one side are used as lateral guide grooves 14 of the intermediate guide plate 14.
Two circular protrusions 12 located on the opposite side are located in the lateral guide groove 15a of the end guide plate 15.

On the right side of the intermediate guide plate 14 and the end guide plate 15, grooved rails 16 and 16 are laid so as to extend the lateral guide grooves 14b and 15a, respectively.
Further, the shuttle guide rail 8 described above constitutes a shuttle passage for reciprocating the shuttle 6. An intermediate guide plate 14 and an end guide plate 15 similar to those described above are installed at the opposite ends of the grooved rails 16, 16, that is, at the ends on the back row side (see FIG. 1), and face each other with the column 1 in between. On the side of the shuttle guide rails 7, 7 on the one end side, a shuttle 6, a transmission chain 13 for driving the shuttle, an intermediate guide plate 14, an end guide plate 15 and a grooved rail 16 are also provided, and the shuttle passage is also provided. Is formed. And the first
As shown in the upper left of the figure, a jig feed fluid cylinder 17 for the front row is provided as a jig feed means at one end of the shuttle guide rails 7, 7, and a chuck 18 is fixed to the tip of the piston rod. The end face hole of the chuck 18 is adapted to fit with the tip of the push rod 5a of the pallet jig 5. Similarly, the jig feed fluid cylinder 17 for the back row is attached to the ends of the shuttle guide rails 8 on the other end side in the lower right of FIG.
Is provided.

As shown in FIG. 1, pallet jigs 5 are arranged on the front and back jig guide rails 3 and 4 respectively corresponding to the processing unit 2, and further, on the shuttle guide rail 7 located at one end of the column 1. Positioned at the back row side (right side in the figure) end of the shuttle guide rail 8 located on the intermediate guide plate 14 and the end guide plate 15 located at the front row side (left side in the figure) end One pallet jig 5 is arranged on each of the intermediate guide plate 14 and the end guide plate 15, and a shuttle 6 is provided at the end on the back row side of the shuttle guide rail 7 on one end side and the other end side. The shuttles 6 are placed at the end portions of the shuttle guide rails 8 on the front row side. In this state, when the piston rods of the front and back fluid cylinders 17 project, the front row jig feed fluid cylinder 17 located in the upper left of the figure.
The end surface hole 18a of the chuck 18 is fitted to the push rod 5a of the pallet jig 5 on the shuttle guide rail 7 on one end side, and the pallet jig 5 is attached to the upper surfaces of the intermediate guide plate 14 and the end guide plate 15. Along one of the guide rails 3 for jigs in the front row, and then pallet jig 5 on the guide rails 3 for jigs in the front row.
Is sequentially fed to push the pallet jig 5 on the other end side of the guide rails 3 for the front row onto the shuttle 6 on the shuttle rail guide rail 8 on the other end side. On the other hand, the end face hole 18a of the chuck 18 of the back row jig feed fluid cylinder 17 located at the lower right of the figure is fitted to the push rod 5a of the pallet jig 5 on the shuttle rail guide rail 8 on the other end side. The pallet jig 5 is pushed out to the other end of the back row jig guide rail 4, and then the pallet jig 5 on the back row jig guide rail 4 is sequentially fed to the pallet on one end side of the back row jig guide rail 4. The jig 5 is pushed out onto the shuttle 6 on the shuttle guide rail 8 on one end side. Then
The shuttles 6 on the one end side and the other end side are respectively driven through the transmission chains 13 of the guide rail 7 for the one end side shuttle and the guide rails 8 for the other end side shuttle, and the one end side shuttle 6 is used for the jig on the back row. The pallet jig 5 pushed out from the guide rail 4 is conveyed to the front row side, and the pallet jig 5 whose other end side shuttle 6 is pushed out from the front row jig guide rail 3 is conveyed to the back row side. The shuttle 6 is returned after the pallet jig 5 has been delivered to the intermediate guide plate 14 and the end guide plate 15. When the pallet jig 5 is transported, the two circular protrusions 12 at the center of the lower surface of the pallet jig 5 are pushed by the shuttle 5, and the circular protrusions 12 at both ends slide on the grooved rail 16.

FIG. 6 shows a jig accommodating portion provided above the shuttle guide rail 8 on the other end side of the column 1 in order to store the pallet jig 5 for a new lot at the time of changing the lot. A pair of inlets on which one pallet jig 5 can be placed respectively above the front row side guide plates 14 and 15 located on the right side and above the back row side guide plates 14 and 15 located on the lower right side of the figure. Rails 21, 22 and outlet rails 23, 24 are provided in parallel (see FIG. 7), and three pallet jigs 5 are arranged in a line between the inlet rails 21, 22 and the outlet rails 23, 24. A pair of intermediate rails 25 and 26 that can be placed are provided in parallel, and face the inlet rails 21 and 22 and the outlet rail.
Guide rollers 27 are attached to the facing surfaces of 23 and 24 and the facing surfaces of the intermediate rails 25 and 26, respectively, and the pallet jig 5 is placed on these two rows of guide rollers 27.

Details of the inlet rails 21, 22 described above are shown in FIGS. 7 and 8. Of the entrance rails 21 and 22, the inner rail 21 closer to the column 1 is fixed to the lower end of the downward arm 32 fixed to the upper support shaft 31 as shown in FIG. A piston rod 34 of an upper opening / closing fluid cylinder (not shown) is attached to the end of the fixed horizontal arm 33.
When the piston rod 34 is projected, the inner rail 21 is swung in the direction of the arrow from the position shown by the solid line in FIG. 8 and the guide roller 27 is disengaged from the lower surface of the edge of the pallet jig 5. On the other hand, the outer rail 22 remote from the column 1 is fixed to the upper end of an up-down arm 36 fixed to a lower support shaft 35, and the lower end of the arm 36 is provided with an opening / closing fluid cylinder (not shown). When the piston rod 37 is connected, the outer rail 22 swings in the direction of the arrow from the position indicated by the solid line when the piston rod 37 is projected, and the guide roller 27 is disengaged from the lower surface of the edge of the pallet jig 5. When the piston rods 34 and 37 are retracted and the inner and outer entrance rails 21 and 22 are at the positions shown by the solid lines in the drawing, the pallet jig 5 on the guide roller 27 is in contact.
And a small gap is formed between the upper end of the pillar 11 of the pallet jig 5 on the shuttle 6 below.

In FIG. 6, two elevating arms 38 for raising the pallet jig 5 on the shuttle 6 to the entrance rails 21 and 22 are provided below the entrance rails 21 and 22 in parallel with the guide rails 8. These two lifting arms 38 are
A transfer fluid cylinder (not shown) provided on the upper left side of 21 and 22 is horizontally protruded through a block 40 at a lower end of a piston rod 39. FIG. 9 and FIG.
As shown in FIG. 10, the block 40 is formed in a gate shape, the piston rod 39 is fixed to the center of the upper surface, and the guide rods 41 and 41 are fixed to both sides of the piston rod 39. The above two arms 38 are fixed to the lower end,
One of them (left side in Fig. 10) is the shuttle 6 and the end guide plate 15
, And the other is inserted between the shuttle 6 and the intermediate guide plate 14, respectively. Then, the lifting arm 38
A horizontal receiving plate 42 is integrally provided on the outer side of the base of the bush, and a pin 43 (see FIG. 10) protruding from the upper surface of the receiving plate 42 is fixed to the lower surface of the pallet jig 5. 5d
To prevent the pallet jig 5 from being displaced (see FIG. 9).

The elevating arm 38 and the entrance rails 21 and 22 are jig transfer means for transferring the pallet jig 5 pushed onto the shuttle 6 from the jig guide rail 3 in the lower front row to the jig storage section. The two lifting arms 38 start to rise from the gaps on both sides of the shuttle 6, push up the pallet jig 5 on the shuttle 6, and the pallet jig 5
The small protrusion 11a at the tip of the column 11 of the
The upper pallet jig 5 is fitted into the hole 12a of the circular projection 12 on the lower surface to support the upper pallet jig 5 at the same time, and accordingly, the pallet jig 5 guides the guide rollers 27 of the entrance rails 21 and 22.
Emerge from. At this time, when the arms 32, 36 supporting the entrance rails 21, 22 are swung to open the entrance rails 21, 22, the lower pallet jig 5 can pass between the entrance rails 21, 22. After the pallet jig 5 has passed, the inlet rails 21 and 22 are closed and returned to the original position, and the elevating arm 38 is lowered to move the lower pallet jig 5 to the inlet rail.
Reprinted on pages 21 and 22. The exit rail on the right side of Fig. 6
23 and 24 are also formed to be openable and closable similarly to the above, and an elevating arm 44 similar to the elevating arm 38 for the entrance rails 21 and 22 is provided to the right of the exit rails 23 and 24. 23, 24 and the lifting arm 44 constitute jig removing means for taking out the pallet jig 5 in the jig storing section and lowering it on the intermediate guide plate 14 and the end guide plate 15 located at the lower right of FIG. is doing.

In FIG. 7, the three intermediate pallet jigs 5 are connected to the long intermediate rails 25 and 26 between the inlet rails 21 and 22 and the outlet rails 23 and 24 via the guide rollers 27 as described above.
Can be placed in a row. A plurality of guide rollers 51 (see FIG. 8) are arranged along the outer rail 26 of the intermediate rails 25 and 26, and a sliding pipe 52 parallel to the intermediate rail 26 is provided on these guide rollers 51. The tip of the sliding pipe 52 is placed and connected by a connector 54 to the tip of a piston rod 53a of a fluid cylinder 53 provided in parallel with the sliding pipe 52. A small fluid cylinder 55 is installed on the connector 54, and the piston rod 55a of the small fluid cylinder 55 is mounted on the sliding pipe 52.
The sliding pipe 52 is connected to an upward arm 56 (see FIG. 8) protruding near the tip of the sliding pipe 52, and the sliding pipe 52 rotates a little by the operation of the fluid cylinder 55. And the above sliding pipe
Feed arms 57 and 58 that engage with both ends in the feed direction of a total of four pallet jigs 5 lined up on the entrance rails 21 and 22 and the intermediate rails 25 and 26 are fixed to 52 and are parallel to the sliding pipe 52. The sliding pipe 52 moves to the 6th position as the fluid cylinder 53 operates.
As shown in FIG. 7 and FIG. 7, the feed arms 57 and 58 are engaged in the forward step to feed the pallet jig 5 rightward by one pitch, and the feed arms 57 and 58 are engaged in the return step. It comes off and returns to the original state. In addition, as shown in FIG.
A stopper 59 is provided in contact with the right end of the pallet jig 5 on the exit rails 23 and 24.

In the above jig storing section, a total of 16 new lot pallet jigs 5 are stored in advance in four rows and four stages on the intermediate rails 25 and 26 and the exit rails 23 and 24. Then, the sixth
When the old lot pallet jig 5 is pushed out onto the guide plates 14 and 15 located at the lower left of the figure, the pallet jig 5 is transferred onto the entrance rails 21 and 22 by the elevating arm 38. Repeat up and down 4 on entrance rails 21 and 22
The old lot pallet jigs 5 are transferred. During this time,
The pallet jigs 5 for the new lot on the exit rails 23, 24 are sequentially moved one by one on the guide plates 14, 15 at the lower right of FIG. It is pushed out to the guide rail 4. In this way, the entrance rails 21, 22
When the four old lot pallet jigs 5 are transferred onto the upper rails and the new lot pallet jigs 5 on the exit rails 23 and 24 are unloaded to empty the exit rails 23 and 24, the sliding pipe 52 Is driven, 16 pallet jigs 5 arranged in 4 rows and 4 stages on the entrance rails 21 and 22 and the intermediate rails 25 and 26 are simultaneously sent to the right, and the entrance rails 21 and 22 are emptied, The feed pipes 57, 58 are removed from the pallet jig 5 by the rotation of the sliding pipe 52, and then the sliding pipe 52 is returned to the original position. Less than,
By repeating the above operation, the pallet jigs 5 for the old lot in the front row are exchanged for the new lot and pushed out to the jig guide rails 4 in the back row. On the one end side of the column 1, the pallet jigs 5 for the old lot on the back row are similarly exchanged for the new lot and pushed out to the jig guide rails 3 on the front row.

(Effects of the Invention) The present invention is for a shuttle that has a large number of processing units arrayed on both the front and back sides of a horizontally long column, and that connects the front and back jig guide rails along the column at right angles to each other. The workpieces on the pallet jigs are machined in order by the machining unit while circling a large number of pallet jigs in one direction along a rectangular guide rail that surrounds the column composed of the guide rails. Therefore, it is easy to replace the blade, and it is not necessary to provide an extra space for the operator to replace the blade, and the installation area can be reduced. When sending the pallet jigs with the guide rails for the jigs on the front and back of the column, arrange a number of pallet jigs in a butt shape and press the pallet jig at one end by a predetermined pitch to The pallet jig is pushed forward to push the pallet jig at the other end to the shuttle guide rail, and the pushed pallet jig is conveyed by the shuttle to the end of the jig guide rail on the opposite side. The pallet jig feed mechanism is simple, and when the pallet jig is located on the shuttle guide rail, the pallet jig is only on the shuttle, so the pallet jig can be easily attached and detached.
The pallet jig can be quickly replaced when changing lots.

In addition, a jig storage portion is provided above the shuttle guide rail for accommodating the pallet jigs in a multi-row and multi-stage manner, and the jig guide rails on the front and back are pushed to one end of the shuttle guide rail. The pallet jig is transferred to the above-mentioned jig storage part, and another pallet jig is taken out from the other end of the jig storage part and transferred to the other end of the shuttle guide rail below. By storing the pallet jig for the new lot in the storage section in advance,
The pallet jig of the old lot can be automatically replaced with the pallet jig of the new lot as needed, and it is not necessary to stop the operation of the processing unit when changing the lot, and the operation rate is greatly improved.

[Brief description of drawings]

1 is a plan view of an embodiment of the present invention, FIG. 2 is a plan view of a pallet jig, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is an enlarged bottom left portion of FIG. FIG. 5 is a plan view, FIG. 5 is a sectional view taken along line VV of FIG. 4, FIG. 6 is a front view of a jig storing portion, FIG. 7 is a sectional view taken along line VII-VII of FIG. 6, and FIG. 6 is a left side view, FIG. 9 is an enlarged front view of the lifting arm, and FIG. 10 is a right side view of FIG. 1: column, 2: processing unit, 3, 4, 7, 8: guide rail, 5: pallet jig, 6: shuttle, 13: transmission chain for shuttle transfer, 17: jig feed fluid cylinder, 21, 22: Entrance rail of jig storage, 23, 2
4: Exit rail of jig storage part, 25, 26: Intermediate rail of jig storage part, 40: Lifting arm for jig transfer, 44: Lifting arm for jig removal.

Claims (1)

[Claims] 1. A large number of processing units are arranged on both front and back surfaces of a horizontally long column at a constant pitch, and guide rails for a work mounting pallet jig are provided on both front and back surfaces of the column. Arrange the pallet jigs on the jig guide rails at a pitch equal to the arrangement pitch of the processing units so that adjacent ones are in contact with each other, and fix the front side and the back side on one end side and the other end side of the column. A shuttle guide rail that extends between the ends of the tool guide rail is provided, and the shuttle guide rail reciprocates between the front and back jig guide rails and is pushed out from the jig guide rail at one end. Shuttles are provided for carrying and carrying to the other end, and the shuttles are installed on one end of the front jig guide rail and the other end of the back jig guide rail. The pallet jig conveyed by the shuttle is pushed out by the arrangement pitch on the jig guide rail and transferred onto the jig guide rail, and the pallet jig on the jig guide rail is intermittently arranged by the arrangement pitch. Is provided with a jig feeding means for feeding the pallets to above and above the shuttle guide rails on one end side and the other end side of the column, respectively, and a jig accommodating portion capable of accommodating pallet jigs in a multi-row and multi-stage manner is provided. , A jig transfer means for transferring the pallet jig pushed out to the shuttle at one end of the shuttle guide rail at one end of the jig storage part to the jig storage part, and at the other end of the jig storage part A transfer machine characterized in that each of the transfer machines is provided with a jig take-out means for taking out the pallet jig in the jig accommodating section and transferring it to the other end of the shuttle guide rail.