JP3712900B2 - Press machine transfer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer device of a transfer press machine. More specifically, in the transfer device, fingers are arranged corresponding to each process, and the workpiece is opened and closed by moving back and forth, moving left and right (perpendicular to the traverse direction) and stopping when the workpiece is stopped. The present invention relates to a transfer device of a press machine that sequentially transfers the film to the processing stage of the next process.
[0002]
[Prior art]
As a transfer technology of a transfer press machine that has been generally adopted in the past, a pair of fingers that open and close on both the right and left sides perpendicular to the workpiece feed direction are installed on the processing stage of each process, and the fingers are moved in the workpiece feed direction (traverse direction). ), And a method of holding the workpiece by pressing from the left and right is widely known.
[0003]
[Problems to be solved by the invention]
In the transfer device of a conventional transfer press machine, the fingers are supported symmetrically in the traverse direction so as to be able to advance and retreat, and are urged in a direction (a direction in which the workpiece is sandwiched) always closed by the action of a spring. And when opening a finger, a workpiece | work or a punch is applied to the workpiece | work holding part of a finger, and is forcedly expanded. For this reason, there is little influence when the punch with a large workpiece inner diameter is thick, but when the workpiece inner diameter is small (for example, the workpiece inner diameter is 1 mm or less), the punch closes the finger when expanding the finger. In other words, the punch was bent or bent, which caused molding failure of the workpiece by the transfer press. As the speed of the operation of the transfer press increases, the occurrence rate of this trouble further increases, and since the work and finger are in direct contact with each other, there is a problem that the work is rubbed and the quality is deteriorated.
The present invention has been made in view of such problems of the prior art, and an object of the present invention is to prevent punch bending or bending even in the formation of a small-diameter workpiece. Another object of the present invention is to prevent wrinkling of the workpiece due to punching even at a high speed operation of the transfer press machine. The present invention provides a transfer device that opens and closes a finger without contacting the punch or the workpiece and the finger, and transfers the workpiece while holding the workpiece on the finger.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the transfer device of the press machine according to the first aspect of the present invention is provided with a plurality of processing stages connected in series, and performs deformation processing on the workpiece with an upper die and a lower die provided in each processing stage, A transfer device of a press machine that sequentially transfers the workpiece to the next processing stage, and a plurality of fingers with two finger levers arranged in an X-shape in a western shape and provided with a workpiece gripping portion at the tip A spring that constantly urges the workpiece gripping portion in a direction sandwiching the workpiece, a plate cam mechanism that opens the workpiece gripping portion of the finger against the force of the spring, and a first guide provided in a direction perpendicular to the transfer direction A first drive mechanism for transmitting the displacement of the first disc cam through a lever to a first connecting plate guided by a rail so as to be able to advance and retreat, and supporting the plate cam mechanism; Processing A transfer slide holding portion for mounting said fingers to correspond to over di-, and a second drive mechanism for moving back and forth the transfer slide holder in the transfer direction, advancing and retracting said transfer slide holder in the transfer direction perpendicular to the direction and a third drive mechanism, said first, second, is to transfer the sequentially following working stages the workpiece by a third said finger synchronizes the respective drive mechanisms.
According to the first aspect of the present invention, at the timing when the ram rises, the transfer slide holding portion that grips the workpiece with the plate-shaped cam retreating when the X-shaped western finger moves forward and the workpiece moves forward, Before the dead point, the transfer slide holder transfers the workpiece to the next processing stage. Next, the plate cam advances to open the finger, the finger moves backward, and the transfer slide holding part starts to move backward before the bottom dead center of the ram. At the bottom dead center of the ram, the punch is finished and the ram starts to rise. The finger moves forward before the retracted end where the transfer slide holding part returns upstream in the transfer direction. At substantially the same time as the finger advancement end, the plate cam moves backward to grip the workpiece, and the transfer slide holding portion starts moving forward before reaching the top dead center of the ram.
[0005]
Since it operates in this way, the operation to open the fingers to grip the workpiece is performed with a plate cam, so that the workpiece or punch and the fingers (work clamp part) are not brought into contact with each other. Even if it is a small-diameter product, bending and folding of the punch do not occur. Further, even if the transfer press is operated at a high speed, no problem occurs, and therefore the service life of the punch is extended. In addition, no wrinkles occur on the workpiece.
[0006]
Furthermore, the displacement of the cam is transmitted through the lever by the rotation of the first disc cam, the connecting plate moved on the guide rail is advanced and retracted, and the plate cam opens and closes the finger operating arm end to open and close the finger gripping portion. Let For this reason, the plate cam mechanism can smoothly move back and forth, and the transfer device can be operated more stably. The plate cam mechanism is used to open the fingers for gripping the workpiece, so that the workpiece or punch and fingers (work clamp part) do not come into contact with each other. The punch is not bent or broken. Further, even if the transfer press is operated at a high speed, no problem occurs and the service life of the punch is extended. In addition, there are no scratches on the workpiece.
[0007]
The invention of this second aspect, the transfer slide holding portion, and a second connecting plate which is movably supported on the first guide rail provided on the transfer direction perpendicular to the direction on the second connecting plate a transfer bar wherein is movably supported front and back by the transfer direction to a second guide rail of the transfer direction, and arranged in a row on one side of the transfer line is fastened on the transfer bars corresponding to the fingers on the processing stage it is made and a finger over the support plate.
According to the second aspect of the present invention, the finger moves to the processing stage position and the retracted position by moving the second connecting plate in the direction perpendicular to the transfer direction, and the transfer bar moves back and forth in the transfer direction between the processing stages. The workpiece that is moved and gripped is sequentially fed to the next processing stage. As a result, the transfer operation is smooth and the fingers can be positioned on the other side of the operator, so that the workpiece can be easily monitored.
[0008]
The invention of this third aspect, the second drive mechanism for moving back and forth the transfer slide holding portion, said movably supported back and forth transfer direction to the second guide rail provided in said transfer direction, the fingers via the lever to the transfer bars which are placed the one in which to transmit the displacement of the second disk cam transfer direction.
According to the third aspect of the present invention, the finger is smoothly reciprocated by 1 pitch by the transfer disc guided by the second guide rail by the second disc cam. For this reason, the transfer device can sufficiently cope with the high-speed operation of the press machine.
[0009]
Invention of the present claim 4, the third drive mechanism for advancing and retracting said transfer slide holder in the transfer direction perpendicular to the direction is movably supported on the first guide rails provided in the transfer direction perpendicular to the direction , the transfer bars for mounting said fingers to transmit the displacement of the second through the lever to the connecting plate third circular plate cam movably supporting back and forth in the transfer direction in said transfer direction perpendicular to the direction, the a shall to advance and retreat the transfer slide holder.
According to the fourth aspect of the present invention, the second connecting plate supporting the transfer bar is smoothly moved forward and backward between the processing stage position and the retracted position by the third disc cam. For this reason, the transfer device can sufficiently cope with the high-speed operation of the press machine.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic side view of the drive unit of the ram and transfer device of the present invention, FIG. 2 shows a schematic plan view of the drive unit of the transfer device, and a plan view with a part cut away from the drive unit of the transfer device FIG. 3 shows the state in which the transfer bar is opened at the forward end and the finger is also opened at the forward end by the advancement of the plate cam, and FIG. explain.
[0012]
A crankshaft 2 having a crank 2a rotatably supported on a frame 1a of a machine base 1 of a transfer press machine is connected to a flywheel shaft 4 with a flywheel 4a 4 and an intermediate shaft 5 from a motor 3 provided on a ceiling 1b. Rotation is transmitted through a clutch brake (not shown) by a belt through the belt. The crankshaft 2 is pivotally connected to an arm connection point of a toggle device 7 which is provided in the vertical direction on the frame 1a of the machine base 1 through a connecting rod 6 connected to the crank 2a and whose upper end is a fixed rotation point. . The lower end of the toggle device 7 is connected to a ram 9 that is guided and supported by the frame 1a so as to be movable up and down. The ram 9 includes a punch holder 8 on which punches PT are mounted at equal pitches in a row in the transfer direction.
Therefore, the belt is processed between a die D and a punch PT, which will be described later, which are moved up and down by the rotation of the crankshaft 2 and arranged at corresponding positions.
[0013]
The main drive shaft 13 of the transfer device 25 is rotatably supported in the vertical direction by brackets 12, 12 arranged vertically on the outside of the frame 1 a. A bevel gear 14 is attached to the upper end of the main drive shaft 13 and meshes with a bevel gear 16 attached to the outer end of the crankshaft 2. A torsion gear 17 is attached to the central position of the main drive shaft 13, and a subsidiary of a transfer device 25 that is rotatably supported in parallel with the crankshaft 2 by brackets 18 and 18 disposed horizontally on the frame 1a. It is meshed with a torsion gear 21 attached to the drive shaft 19. Further, a disc cam 22 that is driven forward and backward in the transfer direction of the transfer device 25 is attached to the lower end portion of the main drive shaft 13 in a replaceable manner.
[0014]
A lower base 23 is placed on the upper surface of the bolster 1c of the machine base 1, and die holders 24 for accommodating the dies D of the respective steps are arranged in a line in the order of the steps in the transfer direction at the same pitch as the processing stage. A transfer device 25 is installed on the rear side (right side in FIG. 1) from the transfer line with respect to the worker side so that the workpiece is transferred between the punch PT and the die D and sequentially processed in each step. The transfer device 25 is provided on the lower base 26 of the transfer device. In FIGS. 3 and 4, the transfer device 25 is parallel to two locations separated in a direction orthogonal to the transfer direction on the lower base 26 (left-right direction in FIG. 3). Linear guide rails 27A and 27B are attached. Sliders 28A and 28B are mounted on the linear guide rails 27A and 27B, respectively, and both are connected by a connecting plate 29.
[0015]
A linear guide rail 31 is further mounted on the connecting plate 29 in the transfer direction. Two sliders 32A and 32B are placed on the linear guide rail 31, and the slider is longer than the connecting plate 29 and protrudes to the side on which a link lever 51 described later is pivotally attached. The bar 33 is fastened with screws. Further, the transfer bar 33 is formed with a flange in the transfer direction, and a finger support plate 34 whose side surface is positioned is placed on the flange and fixed with screws. In addition, the western-shaped fingers 36 having finger levers assembled in the X shape on the finger support plate 34 are arranged in a line at equal intervals so that the transfer direction can correspond to eight positions of nine processing stages in this embodiment. Are arranged on the same line continuously. FIG. 3 shows the position of the finger 36 at the position where the transfer bar 33 has advanced.
[0016]
The finger support plate 34 is divided into a thick portion 34a and a thin portion 34b substantially at the center in the transfer direction, and the workpiece gripping side is a thick portion 34a. In the thick part 34a, a square window 34c through which the gripping arm of the finger 36 can penetrate is formed from the side surface on the workpiece side corresponding to the pitch of the processing stage.
[0017]
The finger 36 has two lever levers 37A and 37B combined in an X shape, and is pivotally supported by a finger support plate 34 with a pin 38 around a crossing point as a rotation center to form a western shape. The gripping arms of the finger levers 37A and 37B extend through the square window 34c to the processing position, and concave arc surfaces along the work outer diameter are formed on the work gripping portions 37Aa and 37Ba of the respective arms. The other actuating arm extends on the thin portion 34b and can be freely opened and closed. Opposite surfaces with which a wedge cam 46a, which will be described later, comes into contact with the end portion are formed as convex arc surfaces 37Bb and 37Ab. The gripping arms and the operating arms of the two finger levers 37A and 37B are substantially parallel to each other when the workpiece is gripped. Compression springs 39A and 39B that constantly urge the gripping arms in the closing direction are interposed between the recesses formed on the opposing inner surface of the square window 34c of the finger support plate 34 and the gripping arms of the finger levers 37A and 37B. Yes. And the lid | cover 41 which plugs up the recessed part outer side opening part of an opposing inner surface is attached so that spring 39A, 39B may not fall off. Furthermore, a stopper 40 that restricts the closing position of the finger levers 37A and 37B is positioned between the finger levers so that the finger levers 37A and 37B have an interference margin that is not deformed and can be gripped when the thin workpiece that has been drawn is gripped. The thick wall 34a protrudes from the center outer edge of the square window. Incidentally, when the workpiece is changed are those replaced with finger over lever having a recessed circular surface corresponding to the work gripping diameter.
[0018]
On the linear guide rails 27A and 27B, the same sliders 42A and 42B as the sliders 28A and 28B are mounted, and similarly, the sliders 42A and 42B are connected by the connecting plate 43. A plate cam support plate 44 is fastened on the connecting plate 43 with screws. The plate cam 46 is provided at right angles to the transfer direction at positions corresponding to nine positions of the machining stage of this embodiment. That is, the wedge cam 46a can be inserted at the center position of the lever levers 37A and 37B facing the operating arms of the lever-type western-shaped finger 36.
A wedge cam 46a that is inserted / removed between the tip convex arc surfaces 37Ab and 37Bb of the operating arm of the finger lever protrudes from the tip of the nine plate cams 46 arranged in parallel, and the wedge cam 46a enters. As a result, the gripping arm and the operating arm are opened. A long window 46b is perforated at the rear end of the plate cam 46, and is attached by a bolt so that the cam operation timing of the plate cam 46 can be adjusted. And the position is prescribed | regulated by the adjustment and stopping bolt 47. FIG.
[0019]
A bifurcated arm lever that can be rotated by a pin on a bracket 52 protruding from the frame 1a between the disc cam 22 and the transfer device 25, which are mounted on the main drive shaft 13 of the transfer device and have the same diameter at all angles. 53 is pivotally supported. The bifurcated arm lever 53 has a bifurcated one arm 53a, and cam followers 54 and 54 are pivotally supported at the respective ends, and the disk cam 22 is abutted on the diameter without any gap. The arm 53b on the opposite side of the fulcrum is connected to a link lever 51 that is connected to the transfer bar 33 and the length of the link lever is adjustable. Therefore, the reciprocating position of the transfer bar 33 can be adjusted, and the punch PT and the gripping center of the finger 36 can be matched. Accordingly, the rotation of the disc cam 22 by the rotation of the main drive shaft 13 of the transfer device causes the bifurcated arm lever 53 to swing, and the transfer bar 33, the finger support plate 34 and the eight fingers 36 are transferred in the transfer direction via the link lever 51. Back and forth. The cam ratio of the disc cam 22 and the lever ratio of the forked arm lever 53 are determined so that this reciprocating stroke is the same as the pitch of the machining stage. Further, disc cams 56 and 57 having the same diameter length at all angles are fixedly attached to the sub drive shaft 19 of the transfer device.
[0020]
A support shaft 58 is fixed to the frame 1a in parallel with the auxiliary drive shaft 19, and the bifurcated arm levers 60 and 61 are rotatably supported. The bifurcated arm 60a of the bifurcated arm lever 60 abuts the disc cam 56 with a cam follower 62, 62 pivotally supported at the tip of the bifurcated arm lever 60 so that there is no gap on the diameter. The other arm 60b is pivotally connected to a link lever 64 pivotally connected to a connecting piece 63 fastened with a bolt to a side protrusion of the plate cam support plate 44. The link lever 64 can be adjusted in length by changing the connection position with the bifurcated arm lever 60. Therefore, delicate adjustment of the operation timing of the plate cam 46 by the rotation of the disc cam 56 is possible.
[0021]
The bifurcated arm 61a of the bifurcated arm lever 61 abuts the disc cam 57 with a cam follower 66, 66 pivotally supported at the tip of the bifurcated arm 61a with no gap on the diameter. The other arm 61b is pivotally connected to a link lever 68 pivotally connected to a connecting piece 67 fastened to the connecting plate 29 with a bolt. The length can be adjusted by changing the connection position with the link lever 68. Therefore, the position of the connecting plate 29, that is, the finger support plate 34 on the connecting plate 29 can be finely adjusted (perpendicular to the transfer direction). The operating phases of the disc cams 22, 56, 57 are adjusted to the mounting position in advance by returning to the design diagram.
[0022]
A description will be given with reference to FIG. 5 showing an operation diagram of the ram 9 moving up and down, the finger 36 opening and closing, the finger 36 moving forward and backward, and the transfer bar 33 moving forward and backward.
[0023]
Now, the ram 9 is located at the top dead center, and this position is set to a crank angle of 0 degree. The plate cam 46 is at the retracted end, and the finger 36 is in a closed state in which a workpiece is gripped and is in an advanced state. In the transfer bar 33, the cam lift of the disc cam 22 of the main drive shaft 13 is in the middle of the forward movement in the transfer direction (between the machining stages).
The crankshaft 2 is rotated by driving the motor 3, and the connecting rod 6 is pulled rightward in FIG. 1 by the rotation of the crank 2 a, and the pivot point 7 a at the lower end of the toggle 7 lowers the ram 9.
[0024]
At a position where the crank angle is 40 degrees, the transfer bar 33 reaches the forward end, and the workpiece gripped by the finger 36 is transferred by one processing stage. That is, the rotation of the crankshaft 2 rotates the disc cam 22 integrated with the main drive shaft 13 of the transfer device, the bifurcated arm lever 53 rotates clockwise, and the arm 53b reaches the upper rotation end in FIG. The transfer bar 33 is moved by one machining stage. The workpiece is positioned on the same line as the punch PT and the die D in the next process.
[0025]
The plate cam 46 starts moving forward at a crank angle of 70 degrees. That is, the rotation of the crankshaft 2 is transmitted from the torsion gear 17 of the main drive shaft 13 of the transfer device to the sub drive shaft 19 of the transfer device from the torsion gear 21, and the rotation of the disc cam 56 causes the cam action surface. The entering bifurcated arm lever 60 is rotated clockwise in FIG. 1 to advance the connecting plate 43 from the link lever 64, and all the plate cams 46 on the plate cam support plate 44 are simultaneously moved in a direction perpendicular to the transfer direction. Move forward. After the play advance amount to the convex arc surfaces 37Ab and 37Bb at the rear ends of the finger levers 37A and 37B of the finger 36, the wedge cam 46a is pushed between the convex arc surfaces and the rear ends of the finger levers 37A and 37B are opened.
Since the finger lever has a western shape, the workpiece gripping portions 37Aa and 37Ba at the tip are opened against the force of the compression springs 39A and 39B.
[0026]
The plate cam reaches the forward end at a crank angle of 115 degrees, the work gripping part is completely opened, and the work gripping is released.
The finger 36 starts to retract at a crank angle of 120 degrees. That is, the bifurcated arm lever 61 starts to rotate counterclockwise (FIG. 1) in response to the cam lift of the disc cam 57 of the auxiliary drive shaft 19 of the transfer device 25.
[0027]
The transfer bar 33 starts moving backward at a crank angle of 140 degrees. That is, the bifurcated arm lever 53 rotates counterclockwise (FIG. 2) by the subsequent rotation of the disc cam 22 of the main drive shaft 13, and the transfer bar 33 begins to retract.
[0028]
When the crank angle is 160 degrees, the cam lift of the disc cam 57 becomes maximum, and the finger 36 reaches the retracted end. The ram 7 reaches the bottom dead center at a crank angle of 180 degrees after the transfer bar 33 starts to retract, but before that, the punch PT enters the workpiece and starts machining, and the machining is performed while the bottom dead center of the ram 7 is stopped. Complete.
[0029]
Advancement is started with the finger 36 open at a crank angle of 200 degrees. At this time, the transfer bar 33 does not reach the retreat end and is retreating. That bifurcated arm lever 61 to advance the entire finger over 36 with coupling plate 29 via the link lever 68 rotates clockwise in a subsequent rotation of the disc cam 57.
[0030]
At a crank angle of 220 degrees, the transfer bar 33 reaches the backward end.
The finger 36 reaches the forward end at a crank angle of 235 degrees. The workpiece gripping portions 37Aa and 37Ba of the finger 36 are positioned on the same line as the punch PT and the die D of the processing stage so that the processed workpiece can be gripped.
Further, the plate cam 46 starts retreating (in a direction perpendicular to the transfer direction) at the same crank angle of 235 degrees. The workpiece gripping portions 37Aa and 37Ba at the tips of the finger levers 37A and 37B grip the workpiece by the force of the compression springs 39A and 39B by slipping out of the convex arc surfaces of the finger levers 37A and 37B due to the backward movement of the plate cam 46.
[0031]
The plate cam 46 reaches the backward end at a crank angle of 275 degrees. The punch PT that has finished machining the workpiece by raising the ram 9 up to this angle is extracted from the workpiece.
[0032]
The transfer bar 33 starts moving forward at a crank angle of 320 degrees. That is, the bifurcated arm lever 53 is rotated clockwise (FIG. 2) by the subsequent rotation of the disc cam 22 of the main drive shaft 13, and the gripped work is transferred to the next processing stage. Then, one rotation of the crankshaft 2 ends.
[0033]
In summary, the movement of the finger 36 grasps the workpiece at a forward position that is retracted in the transfer direction and perpendicular to the transfer direction, moves forward by a distance between one processing stage, opens the finger, opens the workpiece, and retracts. It moves backward to the direction, moves forward to the processing stage position, closes the fingers and grips the workpiece.
By repeating the above operations, the workpieces processed on the processing stage are sequentially transferred to complete predetermined processing.
[0034]
【The invention's effect】
Since this invention was comprised as mentioned above, there exists an effect described below.
According to the first aspect of the present invention, since the finger is opened by the plate cam mechanism to hold the workpiece, the workpiece, the punch and the finger (work clamp portion) are not brought into contact with each other, thereby performing press working. Even if it is a small-diameter product, bending and bending of the punch will not occur. Further, even if the transfer press is operated at a high speed, no problem occurs, and therefore the service life of the punch is extended. In addition, there is no scratch on the work.
[0035]
Further, the plate cam mechanism can be moved smoothly, and the transfer press machine operates more stably.
[0036]
According to the second aspect of the present invention, since the transfer device can be arranged on one side behind the transfer line, the operator can sufficiently monitor the machining state of the workpiece.
[0037]
According to the third aspect of the present invention, since the movement of the finger-related portion, that is, the transfer slide holding portion is guided by using the guide rail and is driven from the disc cam through the lever, the movement is smooth and the press machine can be operated at a high speed. .
[0038]
According to the fourth aspect of the present invention, since the movement of the finger-related portion, that is, the transfer slide holding portion is guided by using the guide rail and driven from the disc cam via the lever, the movement becomes smooth and the press machine can be operated at a high speed.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a drive system of a ram and transfer device as viewed from the side of a transfer press machine.
FIG. 2 is an explanatory view showing a forward / backward drive mechanism of a transfer bar, a plate cam and a finger advance / retreat drive mechanism of the transfer device.
FIG. 3 is an explanatory plan view of a transfer device.
4 is a view showing the finger lever of the finger in a central cross section in the AA view of FIG. 3;
FIG. 5 is an operation diagram of a ram, a finger cam for opening / closing a finger lever, a finger, and a transfer bar.
[Explanation of symbols]
2 Crankshaft 7 Toggle device 9 Ram 13 Main drive shaft of transfer device 19 Sub drive shaft of transfer device 22, 56, 57 Disk cam 25 Transfer device 36 Fingers 37A, 37B Finger levers 27A, 27B, 31 Guide rails 28A, 28B 32A, 32B, 42A, 42B Slider 33 Transfer bar 29, 43 Connecting plate 34 Finger support plate 39A, 39B Compression spring 40 Stopper 46 Plate cam

Claims (4)

A transfer device for a press machine, in which a plurality of processing stages in series are provided, a workpiece is deformed by an upper die and a lower die provided in each processing stage, and the workpiece is sequentially transferred to the next processing stage. A plurality of fingers having two finger levers arranged in a X-shape in a Western shape and provided with a workpiece gripping portion at the tip; A plate cam mechanism that opens the workpiece gripping portion of the finger against a force, and a first connecting plate that is guided by a first guide rail provided in a direction perpendicular to the transfer direction so as to be able to advance and retract, and supports the plate cam mechanism. a first driving mechanism for advancing and retracting the plate cam mechanism displacement of the first disc cam is transmitted via the lever, and a transfer slide holding portion for mounting said fingers to correspond to the respective working stages Comprises a second drive mechanism for moving back and forth the transfer slide holder in the transfer direction, and a third driving mechanism for advancing and retracting said transfer slide holder in the transfer direction perpendicular to the direction, said first, second, A transfer device for a press machine, wherein the workpieces are sequentially transferred to the next processing stage by the fingers in synchronism with the third driving mechanisms. The transfer slide holding unit, the transfer direction and the second connecting plate, which is movably supported on the first guide rails provided at a right angle, the transfer direction of the second guide rail on the second connecting plate A transfer bar supported so as to be movable back and forth in the transfer direction, and a finger support plate fastened on the transfer bar and arranged in a row on one side of the transfer line corresponding to the processing stage. The transfer device of the press machine according to claim 1 . Wherein said second drive mechanism for moving back and forth transfer slide holding unit, wherein the second guide rail provided on the transfer direction is movably supported back and forth in the transfer direction, the transfer that placing the finger The transfer device of a press machine according to claim 2, wherein the displacement of the second disc cam is transmitted to the bar in the transfer direction via a lever. Said third drive mechanism for advancing and retracting said transfer slide holder in the transfer direction perpendicular to the direction, the is movably supported on the first guide rails provided in the transfer direction perpendicular to the direction, placing the fingers the any of claims 1 to 3 the transfer bar is for transmitting the displacement of the third circular plate cam through the lever to the second connecting plate for movably supporting the front and rear in the transfer direction in said transfer direction perpendicular to the direction A transfer device for a press machine according to claim 1.

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