JP2006110560A - Press apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press apparatus which can carry out highly precise press working by surely correcting the tilting of a movable plate or a slide plate owing to an eccentric load. <P>SOLUTION: Nuts 27, 29 are screwed on screw shafts 19, 20, and are connected to the movable plate 13 so as to turn in a horizontal plane. Sprocket wheels 31, 33 are fixed to the nuts 27, 29. A chain 42 is wound around the respective sprocket wheels 31, 33 and respective toothed idler wheels 38 to 41 without a slack. The respective nuts 27, 29 rotate with the vertical movement of the movable plate 13 in the same direction by the same rotational angle. When the right and left end portions of the movable plate 13 have tilted owing to the eccentric load, the rotational angles of the nuts 27, 29 become different from each other. Then, the tensional force corresponding to the difference of the rotational angles is generated in the chain 42. As a result, the rotations of the respective nuts 27, 29 are regulated such that the rotational angles of the respective nuts 27, 29 become equal with each other. As a result, the rotational angles of the respective nuts 27, 29 become equal with each other, and the tilting of the right and left end portions of the movable plate 13 can be corrected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a press apparatus.

  Conventionally, one of a pair of upper and lower forming dies composed of an upper die and a lower die is attached to a fixed plate and the other is attached to a movable plate, and driven with a workpiece such as a metal plate placed on the lower die Press device (press machine) that presses (compresses) the workpiece between the upper die and the lower die by driving the movable plate using the device and pressing the movable plate against the fixed plate Is widely used.

In this press machine, if an eccentric load is applied to the movable platen and the movable plate is tilted, the pressurizing force between the upper die and the lower die is insufficient, and positional displacement occurs between the upper die and the lower die. Problems such as a reduction in processing accuracy of the material and a shortening of the mold life due to breakage or uneven wear of the mold occur.
In particular, when press-molding a part having a complicated shape such as an automobile part, a slight inclination of the movable plate causes a significant reduction in processing accuracy.

  Further, in a multistage press device having a plurality of slide plates (press plates) provided in multiple stages between the movable platen and the fixed platen, and a molding die attached to each slide plate, each slide plate is a driving device. Since each slide plate is driven by the movement of the movable platen instead of being driven directly by the slide plate, each slide plate is more likely to be inclined due to an eccentric load than the movable platen, and the above-mentioned problem becomes more prominent. .

  Therefore, in order to prevent the occurrence of tilt due to the eccentric load, (1) a technique for providing a guide bar and a sliding guide part on the movable platen, (2) a technique for providing a guide bar and a sliding guide part on the slide plate, (3) There have been proposed a technique for allowing the movable plate to rotate with respect to the moving direction, and (4) a technology for providing a plurality of tiltable cylinder devices as a drive device for the movable plate (see Patent Document 1).

  The technique (1) is a surface in which the movable plate does not rotate around the four corner positions of the movable plate, with the movable plate plane center of the intersecting line intersecting with the plane center of the movable plate from the four corner positions as an axis. A guide bar having a guide surface extending in the intersecting line direction is erected in the vertical direction, and the movable plate is provided with a sliding guide portion that slides in close contact with the guide surface of the guide bar (patent) (See claim 1 of Document 1).

  In the technique (2), in the vicinity of the four corner positions of the press plate (slide plate), the press plate does not rotate around the press plate plane center of the intersection line intersecting with the plane center of the press plate from the four corner positions. A guide bar having a guide surface extending in the direction of the intersecting line is provided in a vertical direction, and the press plate is provided with a sliding guide portion that slides in close contact with the guide surface of the guide bar (See claim 3 of Patent Document 1).

  The technique (3) includes a movable plate and an upper plate (fixed platen) in a chamber, and a plurality of press plates (slide plates) in which a workpiece is placed between the movable plate and the upper plate. A press apparatus configured to arrange and to press the movable plate by a pulling device at the upper part of the upper plate, and press-work each workpiece between the press plates between the movable plate and the upper plate. The lifting rod of the lifting device is connected to the movable plate via a horizontal shaft member that enables the movable plate to rotate with respect to the lifting rod (see claim 7 of Patent Document 1). ).

The technique (4) includes a movable plate and an upper plate (fixed platen) in a chamber, and a plurality of press plates (slide plates) in which a workpiece is placed between the movable plate and the upper plate. A press apparatus configured to arrange and to press the movable plate by a pulling device at the upper part of the upper plate, and press-work each workpiece between the press plates between the movable plate and the upper plate. The lifting device comprises a plurality of cylinder devices installed on the upper part of the upper plate, and the cylinder body of the cylinder device is installed so as to be tiltable with respect to the upper plate (claim of Patent Document 1). Item 8).
Japanese Patent Laid-Open No. 2002-200630 (pages 2 to 6 and FIGS. 1 to 12)

  In the techniques (1) and (2), if the inclination of the movable plate or the press plate (slide plate) is surely corrected, a large guide bar having high strength must be provided. Since the size of the entire press device is increased by the amount of the moving guide portion, there is a problem that a large space is required for installation of the press device and installation cost increases.

In the techniques (1) and (2), the guide surface of the guide bar and the sliding guide portion need to be brought into close contact with each other, so that the maintenance cost required for the maintenance activity for maintaining the close contact state increases. There's a problem.
Further, in the technique (3), since the amount of rotation of the movable platen by the horizontal shaft member cannot be increased, the inclination of the movable platen due to the eccentric load cannot be sufficiently corrected, and the performance is inferior. 2) There is a problem that it must be used together with the technique (4).

In the technique (4), the size of the entire pressing device is increased by the amount of the plurality of cylinder devices, so that there is a problem that a large space is required for installing the pressing device and the installation cost increases.
Further, in the technique (4), since a plurality of expensive cylinder devices are provided, there is a problem that the manufacturing cost of the press device increases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to reduce a pressing device that can accurately correct the inclination of the movable platen or the slide plate due to the eccentric load and perform high-precision pressing. The cost is to provide.

  According to the first aspect of the present invention, there is provided a fixed platen, a rectangular movable plate arranged parallel to the fixed platen in the vertical direction, drive means for moving the movable plate up and down, and the movable platen in the longitudinal direction. Movable plate tilt correction means for preventing tilting to either side of the both ends of the movable plate, and the drive means moves the movable plate to the fixed plate side, between the movable plate and the fixed plate. A press apparatus for pressing a workpiece while sandwiching a workpiece, wherein the movable platen inclination correcting means is disposed at both ends in the longitudinal direction of the movable plate and is connected to the movable plate so as to be rotatable in a horizontal plane. The first nut and the second nut that are screwed to the first nut, the first screw shaft that is inserted into the movable plate, and the second nut are screwed to the movable plate. Inserted second screw shuff A first sprocket fixedly attached to the first nut, a second sprocket fixedly attached to the second nut, and a chain wound around the first sprocket and the second sprocket without slack. The technical feature is that

  According to a second aspect of the present invention, there is provided a fixed platen, a rectangular movable plate arranged parallel to the fixed platen in the vertical direction, driving means for moving the movable plate up and down, the fixed platen and the movable platen. And at least one rectangular slide plate disposed between the slide plate and a slide plate tilt correction unit for preventing the slide plate from tilting to either side in the longitudinal direction. The movable platen is moved to the fixed platen side, and the slide plate is driven by the movement of the movable platen and moved to the fixed platen side. Between the movable platen, the slide plate, and the fixed platen. A multi-stage press apparatus that sandwiches and presses the workpiece, and the slide plate tilt correction means is arranged at both ends in the longitudinal direction of the slide plate. A third nut and a fourth nut rotatably connected to the slide plate in a horizontal plane; and a third screw shaft screwed into the third nut and inserted through the slide plate; , A fourth screw shaft screwed into the fourth nut and inserted through the slide plate, a third sprocket attached and fixed to the third nut, and a fourth screw fixed to the fourth nut. Technical features include a sprocket and a chain wound around the third sprocket and the fourth sprocket without slack.

  A third aspect of the present invention has a technical feature of a press apparatus including the movable platen inclination correcting unit according to the first aspect and the slide plate inclination correcting unit according to the second aspect.

  According to a fourth aspect of the present invention, in the press device according to the third aspect, the first screw shaft and the third screw shaft are shared, and the second screw shaft and the fourth screw shaft are shared. It is a technical feature.

  The invention according to claim 5 is that the fixed platen, the rectangular movable plate arranged parallel to the fixed platen in the vertical direction, the driving means for moving the movable plate up and down, and the movable plate incline. And a movable plate tilt correcting means for preventing the movement, and the driving means moves the movable plate to the fixed platen side, and presses the workpiece by sandwiching the workpiece between the movable platen and the fixed platen. The movable platen inclination correcting means is arranged near the four corners of the movable platen, and is connected to the movable plate so as to be rotatable in a horizontal plane, and the first nut. And the first screw shaft inserted into the movable platen and the second screw shaft inserted into the movable platen and screwed into the third nut. And inserted into the movable plate A third screw shaft, a fourth screw shaft screwed into the fourth nut and inserted through the movable platen, a first sprocket mounted and fixed to the first nut, and the second nut. The second sprocket fixedly attached, the third sprocket fixedly attached to the third nut, the fourth sprocket fixedly attached to the fourth nut, and the first to fourth sprockets wound loosely. It is a technical feature that it has a chain that has been turned.

  According to a sixth aspect of the present invention, there is provided a fixed platen, a rectangular movable plate arranged in parallel with the fixed platen in the vertical direction, a driving means for moving the movable plate up and down, the fixed platen and the movable platen. At least one rectangular slide plate disposed between the slide plate and a slide plate tilt correcting means for preventing the slide plate from tilting, and the drive means moves the movable plate to the fixed plate side. And moving the movable plate to move the slide plate to the fixed platen side, and sandwiching the workpiece between the movable platen, the slide plate, and the fixed platen to perform press processing. The slide plate tilt correction means is disposed in the vicinity of the four corners of the slide plate and rotates in a horizontal plane with respect to the slide plate. And fifth to eighth nuts connected to each other and screwed to the fifth nut, and screwed to the fifth screw shaft inserted into the slide plate and the sixth nut, and the slide A sixth screw shaft inserted through the plate and screwed into the seventh nut; a seventh screw shaft inserted through the slide plate; and screwed into the eighth nut; An inserted eighth screw shaft, a fifth sprocket fixedly attached to the fifth nut, a sixth sprocket fixedly attached to the sixth nut, and a seventh sprocket fixedly attached to the seventh nut; An eighth sprocket attached and fixed to the eighth nut, and a chain wound around the fifth to eighth sprockets without slack. And technical features in that it comprises.

  A seventh aspect of the present invention has a technical feature of a press apparatus including the movable platen inclination correcting unit according to the fifth aspect and the slide plate inclination correcting unit according to the sixth aspect.

  The invention according to claim 8 is a stationary platen, a rectangular movable plate arranged parallel to the fixed plate in the vertical direction, a driving means for moving the movable plate up and down, and the movable plate is inclined. And a movable plate tilt correcting means for preventing the movement, and the driving means moves the movable plate to the fixed platen side, and presses the workpiece by sandwiching the workpiece between the movable platen and the fixed platen. The movable platen inclination correcting means is arranged near the four corners of the movable platen, and is connected to the movable plate so as to be rotatable in a horizontal plane, and the first nut. And the first screw shaft inserted into the movable platen and the second screw shaft inserted into the movable platen and screwed into the third nut. And inserted into the movable plate A third screw shaft, a fourth screw shaft screwed into the fourth nut and inserted through the movable plate, a first sprocket mounted and fixed in two upper and lower stages with respect to the first nut, and A fifth sprocket, a second sprocket and a sixth sprocket that are fixedly mounted in two upper and lower stages with respect to the second nut, and a third sprocket and a seventh sprocket that are fixedly mounted in two upper and lower stages with respect to the third nut. A sprocket, a fourth sprocket and an eighth sprocket that are fixedly mounted in two upper and lower stages with respect to the fourth nut, and a first chain wound without slack on the first sprocket and the second sprocket; A second chain wound without slack around the third sprocket and the fourth sprocket, the fifth sprocket, Technical features include a third chain wound without slack with respect to the seventh sprocket and a fourth chain wound without slack with respect to the sixth sprocket and the eighth sprocket. .

  The invention according to claim 9 is a stationary platen, a rectangular movable plate arranged parallel to the fixed platen in the vertical direction, a driving means for moving the movable plate up and down, the fixed platen and the movable platen. At least one rectangular slide plate disposed between the slide plate and a slide plate tilt correcting means for preventing the slide plate from tilting, and the drive means moves the movable plate to the fixed plate side. And moving the movable plate to move the slide plate to the fixed platen side, and sandwiching the workpiece between the movable platen, the slide plate, and the fixed platen to perform press processing. The slide plate tilt correction means is disposed in the vicinity of the four corners of the slide plate and rotates in a horizontal plane with respect to the slide plate. And fifth to eighth nuts connected to each other and screwed to the fifth nut, and screwed to the fifth screw shaft inserted into the slide plate and the sixth nut, and the slide A sixth screw shaft inserted through the plate and screwed into the seventh nut; a seventh screw shaft inserted through the slide plate; and screwed into the eighth nut; The inserted eighth screw shaft, the ninth sprocket and the thirteenth sprocket mounted and fixed in two upper and lower stages with respect to the fifth nut, and the tenth fixed and fixed in two upper and lower stages with respect to the sixth nut. A sprocket and a fourteenth sprocket, and an eleventh sprocket and a fifteenth sprocket fixedly attached to the seventh nut in two upper and lower stages. A fifth chain that is wound around the ninth sprocket and the tenth sprocket without slack. A sixth chain wound loosely around the eleventh sprocket and the twelfth sprocket; a seventh chain wound loosely around the thirteenth sprocket and the fifteenth sprocket; and the fourteenth sprocket. And an eighth chain wound without slack with respect to the sixteenth sprocket.

  A tenth aspect of the present invention has a technical feature of a press apparatus including the movable platen inclination correcting unit according to the eighth aspect and the slide plate inclination correcting unit according to the ninth aspect.

  The invention according to claim 11 is the press device according to claim 7 or claim 10, wherein the first screw shaft and the fifth screw shaft are shared, the second screw shaft, the sixth screw shaft, Is shared, the third screw shaft and the seventh screw shaft are shared, and the fourth screw shaft and the eighth screw shaft are shared.

  A twelfth aspect of the present invention is the press device according to any one of the first to eleventh aspects, wherein an end portion of the screw shaft is non-rotatably connected and fixed to the fixed platen, and the driving means. Is composed of a cylinder and a piston, and has a technical feature that the tip of the piston is connected and fixed to the movable platen.

  A thirteenth aspect of the present invention is the press device according to any one of the second, sixth, and ninth aspects, wherein an end portion of the screw shaft is rotatably connected to the fixed platen, and the movable A technical feature is that a nut screwed to the screw shaft is attached and fixed to the board, and the driving means rotationally drives the screw shaft.

  The invention according to claim 14 is the press device according to any one of claims 1 to 13, wherein the guide member is connected and fixed to the fixed plate and extends in the vertical direction, and the movable plate or the slide plate. It is a technical feature that the guide member and the sliding member slide closely when the movable platen or the slide plate moves up and down.

  A fifteenth aspect of the present invention is the press device according to any one of the first to fifteenth aspects, wherein the mold is attached and fixed to the movable platen or the slide plate, and the movable platen or the slide plate. A toothed idler that is pivotably connected in a horizontal plane, the toothed idler changing the path of the chain to prevent the chain from interfering with the mold Features.

(Claim 1: Corresponding to the first embodiment or the third embodiment)
A first nut is screwed to the first screw shaft, and a second nut is screwed to the second screw shaft. The first screw shaft and the second screw shaft are inserted through the slide plate. The first nut and the second nut are disposed at both ends in the longitudinal direction of the movable platen, and the first nut and the second nut are connected to the movable plate so as to be rotatable in a horizontal plane.
And the feed screw mechanism is comprised from the movable board, the 1st screw shaft, and the 1st nut. Moreover, the feed screw mechanism is comprised from the movable board, the 2nd screw shaft, and the 2nd nut.

Therefore, when the movable plate moves up and down, the first nut and the second nut rotate in the same direction by the same amount of rotation as the movable plate moves up and down.
At this time, if an eccentric load is applied to the movable platen, inclination is likely to occur at both ends in the longitudinal direction of the movable platen.
And when inclination arises in the longitudinal direction both ends of a movable board, a difference will arise in the amount of rotations (rotation angle) of the 1st nut and the 2nd nut.

For example, in a state where the connection point of the first nut on the movable plate is lifted compared to the connection point of the second nut, the rotation amount of the first nut is smaller than the rotation amount of the second nut.
On the contrary, in the state where the connection point of the second nut on the movable plate is lifted compared to the connection point of the first nut, the rotation amount of the second nut is smaller than the rotation amount of the first nut.

Here, the first sprocket is attached and fixed to the first nut, and the second sprocket is attached and fixed to the second nut. A chain is wound around the first sprocket and the second sprocket without slack.
Therefore, if a difference occurs in the rotation amounts of the first nut and the second nut, a tension is generated in the chain, and the rotation amounts of the first nut and the second nut become the same by the tension corresponding to the difference in the rotation amount. The rotation of the first nut and the second nut is restricted.

As a result, the amount of rotation of the first nut and the second nut becomes the same, and the inclination of both ends in the longitudinal direction of the movable platen, which is the connection point of the first nut and the second nut, is corrected.
Therefore, according to the first aspect of the present invention, by providing the movable plate tilt correcting means, it is possible to prevent the movable plate from being tilted to either side of the both ends in the longitudinal direction due to the eccentric load.

Since the structure of the movable plate tilt correcting means is simple and inexpensive, the manufacturing cost of the press apparatus hardly increases even if the movable plate tilt correcting means is provided.
Further, since no special maintenance activity is required to maintain the operation of the movable plate tilt correction means, the maintenance cost of the press apparatus hardly increases even if the movable plate tilt correction means is provided.
Further, since the movable platen inclination correcting means does not protrude outward from the movable platen, even if the movable platen inclination correcting means is provided, the outer dimensions of the press device are not changed, and the installation cost of the press device does not increase.
Therefore, according to the invention of claim 1, it is possible to provide a press apparatus capable of accurately correcting the inclination of the movable platen due to the eccentric load and performing high-precision press work at low cost.

(Claim 2: Corresponds to the first to third embodiments)
A third nut is screwed to the third screw shaft, and a fourth nut is screwed to the fourth screw shaft. The third screw shaft and the fourth screw shaft are inserted through the slide plate. The third nut and the fourth nut are disposed at both ends in the longitudinal direction of the slide plate, and the third nut and the fourth nut are connected to the slide plate so as to be rotatable in a horizontal plane.
And the feed screw mechanism is comprised from the slide plate, the 3rd screw shaft, and the 3rd nut. Moreover, the feed screw mechanism is comprised from the slide plate, the 4th screw shaft, and the 4th nut.

Therefore, when the slide plate moves up and down, the third nut and the fourth nut rotate in the same direction by the same rotation amount as the slide plate moves up and down.
At this time, if an eccentric load is applied to the slide plate, inclination is likely to occur at both ends in the longitudinal direction of the slide plate.
And if inclination arises in the longitudinal direction both ends of a slide plate, a difference will arise in the amount of rotations (rotation angle) of the 3rd nut and the 4th nut.

For example, in a state where the third nut connection point on the slide plate is lifted compared to the fourth nut connection point, the rotation amount of the third nut is smaller than the rotation amount of the fourth nut.
On the contrary, in the state where the connection portion of the fourth nut on the slide plate is lifted compared to the connection portion of the third nut, the rotation amount of the fourth nut is smaller than the rotation amount of the third nut.

Here, the third sprocket is attached and fixed to the third nut, and the fourth sprocket is attached and fixed to the fourth nut. The chain is wound around the third sprocket and the fourth sprocket without slack.
Therefore, if a difference occurs in the rotation amounts of the third nut and the fourth nut, tension is generated in the chain, and the rotation amounts of the third nut and the fourth nut are made the same by the tension corresponding to the difference in the rotation amount. The rotation of the third nut and the fourth nut is restricted.

As a result, the amount of rotation of the third nut and the fourth nut becomes the same, and the inclination of both ends in the longitudinal direction of the slide plate, which is the connection point of the third nut and the fourth nut, is corrected.
By the way, in the multistage press apparatus, the slide plate is not driven directly by the driving means, but the slide plate is driven by the movement of the movable plate. Therefore, the slide plate is inclined more by the eccentric load than the movable plate. Likely to happen.
However, according to the invention of claim 2, by providing the slide plate tilt correction means, it is possible to prevent the slide plate from tilting to either side of both ends in the longitudinal direction due to the eccentric load.

Since the structure of the slide plate inclination correction means is simple and inexpensive, even if the slide plate inclination correction means is provided, the manufacturing cost of the press device hardly increases.
Further, since no special maintenance activity is required to maintain the operation of the slide plate tilt correction means, the maintenance cost of the press apparatus hardly increases even if the slide plate tilt correction means is provided.
Further, since the slide plate inclination correction means does not protrude outward from the slide plate, the external dimensions of the press apparatus are not changed even if the slide plate inclination correction means is provided, and the installation cost of the press apparatus does not increase.
Therefore, according to the second aspect of the present invention, it is possible to provide a press apparatus capable of accurately correcting the inclination of the slide plate due to the eccentric load and performing high-precision press work at low cost.

(Claim 3: Corresponds to the first embodiment or the third embodiment)
According to the invention of claim 3, both of the actions and effects of the invention of claim 1 and the invention of claim 2 can be obtained.

(Claim 4: Corresponds to the first to third embodiments)
According to invention of Claim 4, since the screw shaft is shared, the number of screw shafts can be reduced and the manufacturing cost of a press apparatus can be reduced.

(Claim 5: Corresponds to the sixth embodiment)
First to fourth nuts are screwed onto the first to fourth screw shafts, respectively. The first to fourth screw shafts are inserted through the movable platen. The first to fourth nuts are connected to the movable plate so as to be rotatable in a horizontal plane. And the feed screw mechanism is comprised from the movable board, the 1st screw shaft, and the 1st nut. Moreover, the feed screw mechanism is comprised from the movable board, the 2nd screw shaft, and the 2nd nut. A feed screw mechanism is composed of the movable platen, the third screw shaft, and the third nut. Moreover, the feed screw mechanism is comprised from the movable board, the 4th screw shaft, and the 4th nut.

Therefore, when the movable plate moves up and down, the first to fourth nuts rotate in the same direction by the same rotation amount as the movable plate moves up and down.
At this time, if an eccentric load is applied to the movable platen, the movable plate tends to be inclined.
When the tilt is generated in the movable platen, a difference occurs in the rotation amount (rotation angle) of the first to fourth nuts.

For example, in a state where the connection portion of the first nut on the movable plate is lifted, the rotation amount of the first nut is smaller than the rotation amounts of the other nuts.
Further, in a state where the connection portion of the second nut on the movable plate is lifted, the rotation amount of the second nut is smaller than the rotation amounts of the other nuts.

Here, the first to fourth sprockets are attached and fixed to the first to fourth nuts, respectively.
Further, the chain is wound around the first to fourth sprockets without slack.
Therefore, if a difference occurs in the rotation amount of the first to fourth nuts, tension is generated in the chain, and the rotation amount of the first to fourth nuts becomes the same by the tension corresponding to the difference in the rotation amount. The rotation of the first to fourth nuts is restricted.

As a result, the rotation amounts of the first to fourth nuts become the same, and the inclination of the vicinity of the four corners of the movable platen, which is the connection point of the first to fourth nuts, is corrected.
Therefore, according to the invention of claim 5, by providing the movable plate tilt correction means, it is possible not only to prevent the movable plate from tilting to either side of the left and right end portions due to the eccentric load, but the movable plate can be It is possible to prevent tilting to either side of the plate, and the horizontal state of the movable plate can be maintained.
Therefore, according to the invention of claim 5, even when the width of the movable plate in the front-rear direction (depth direction) is large, the inclination of the movable plate can be reliably corrected.

Since the structure of the movable plate tilt correcting means is simple and inexpensive, the manufacturing cost of the press apparatus hardly increases even if the movable plate tilt correcting means is provided.
Further, since no special maintenance activity is required to maintain the operation of the movable plate tilt correction means, the maintenance cost of the press apparatus hardly increases even if the movable plate tilt correction means is provided.
Further, since the movable platen inclination correcting means does not protrude outward from the movable platen, even if the movable platen inclination correcting means is provided, the outer dimensions of the press device are not changed, and the installation cost of the press device does not increase.
Therefore, according to the invention of claim 5, it is possible to provide a press apparatus capable of accurately correcting the inclination of the movable platen due to the eccentric load and performing high-precision press work at low cost.

(Claim 6: Corresponds to the fourth embodiment or the sixth embodiment)
The fifth to eighth screw shafts are screwed with fifth to eighth nuts, respectively. The fifth to eighth screw shafts are inserted through the movable platen. The fifth to eighth nuts are connected to the slide plate so as to be rotatable in a horizontal plane. And the feed screw mechanism is comprised from the slide plate, the 5th screw shaft, and the 5th nut. Moreover, the feed screw mechanism is comprised from the slide plate, the 6th screw shaft, and the 6th nut. Further, a feed screw mechanism is constituted by the slide plate, the seventh screw shaft, and the seventh nut. Moreover, the feed screw mechanism is comprised from the slide plate, the 8th screw shaft, and the 8th nut.

Therefore, when the slide plate moves up and down, the fifth to eighth nuts rotate in the same direction by the same rotation amount as the slide plate moves up and down.
At this time, if an eccentric load is applied to the slide plate, the slide plate is likely to be inclined.
When the slide plate is inclined, a difference occurs in the rotation amount (rotation angle) of the fifth to eighth nuts.

For example, in a state where the connection portion of the fifth nut on the slide plate is lifted, the rotation amount of the fifth nut is smaller than the rotation amounts of the other nuts.
Further, in a state where the connection portion of the sixth nut on the slide plate is lifted, the rotation amount of the sixth nut is smaller than the rotation amounts of the other nuts.

Here, the fifth to eighth sprockets are fixedly attached to the fifth to eighth nuts, respectively.
The chain is wound around the fifth to eighth sprockets without slack.
Therefore, if there is a difference in the rotation amount of the fifth to eighth nuts, tension is generated in the chain, and the fifth and eighth nuts have the same rotation amount by the tension corresponding to the difference in the rotation amount. The rotation of the fifth to eighth nuts is restricted.

As a result, the rotation amounts of the fifth to eighth nuts become the same, and the inclination of the vicinity of the four corners of the slide plate, which is the connection point of the fifth to eighth nuts, is corrected.
By the way, in the multistage press apparatus, the slide plate is not driven directly by the driving means, but the slide plate is driven by the movement of the movable plate. Therefore, the slide plate is inclined more by the eccentric load than the movable plate. Likely to happen.

However, according to the invention of claim 6, by providing the slide plate tilt correction means, it is possible not only to prevent the slide plate from tilting to either one of the left and right end portions due to the eccentric load, but the slide plate can be It is possible to prevent the slide plate from tilting to either side, and the slide plate can be kept horizontal.
Therefore, according to the invention of claim 6, even when the width of the slide plate in the front-rear direction (depth direction) is large, the tilt of the slide plate can be corrected reliably.

Since the structure of the slide plate inclination correction means is simple and inexpensive, even if the slide plate inclination correction means is provided, the manufacturing cost of the press device hardly increases.
Further, since no special maintenance activity is required to maintain the operation of the slide plate tilt correction means, the maintenance cost of the press apparatus hardly increases even if the slide plate tilt correction means is provided.
Further, since the slide plate inclination correction means does not protrude outward from the slide plate, the external dimensions of the press apparatus are not changed even if the slide plate inclination correction means is provided, and the installation cost of the press apparatus does not increase.
Therefore, according to the invention of claim 6, it is possible to provide a press apparatus capable of accurately correcting the inclination of the slide plate due to the eccentric load and performing high-precision press work at low cost.

(Claim 7: Corresponds to the sixth embodiment)
According to the invention of claim 7, both the actions and effects of the invention of claim 5 and the invention of claim 6 can be obtained.

(Claim 8: corresponds to the seventh embodiment)
First to fourth nuts are screwed onto the first to fourth screw shafts, respectively. The first to fourth screw shafts are inserted through the movable platen. The first to fourth nuts are connected to the movable plate so as to be rotatable in a horizontal plane. And the feed screw mechanism is comprised from the movable board, the 1st screw shaft, and the 1st nut. Moreover, the feed screw mechanism is comprised from the movable board, the 2nd screw shaft, and the 2nd nut. A feed screw mechanism is composed of the movable platen, the third screw shaft, and the third nut. Moreover, the feed screw mechanism is comprised from the movable board, the 4th screw shaft, and the 4th nut.

  Moreover, the 1st-4th sprocket and the 5th-8th sprocket are attached and fixed to the 1st-4th nut at the upper and lower two steps, respectively. The first chain is wound without slack on the first sprocket and the second splot. Further, the second chain is wound around the third sprocket and the fourth splot without slack. Further, the third chain is wound around the fifth sprocket and the seventh splot without slack. Further, the fourth chain is wound around the sixth sprocket and the eighth splot without slack.

Here, for example, it is assumed that the first nut and the second nut are arranged at the front left and right end portions of the movable platen, and the third nut and the fourth nut are arranged at the rear left and right end portions of the movable platen.
Then, as in the first aspect of the invention, when a difference occurs in the amount of rotation of the first nut and the second nut, tension is generated in the first chain, and the first nut and the nut are caused by the tension corresponding to the difference in the amount of rotation. The rotation of the first nut and the second nut is restricted so that the rotation amount of the second nut is the same.
As a result, the amount of rotation of the first nut and the second nut becomes the same, and the inclination of the left and right ends of the front side of the movable platen, which is the connection point of the first nut and the second nut, is corrected.

Further, if a difference occurs in the rotation amounts of the third nut and the fourth nut, a tension is generated in the second chain, and the rotation amounts of the third nut and the fourth nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the third nut and the fourth nut is restricted.
As a result, the amount of rotation of the third nut and the fourth nut becomes the same, and the inclination of the left and right ends of the rear side of the movable platen, which is the connection point of the third nut and the fourth nut, is corrected.

Further, if a difference occurs in the rotation amounts of the fifth nut and the seventh nut, a tension is generated in the third chain, and the rotation amounts of the fifth nut and the seventh nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the fifth nut and the seventh nut is restricted.
As a result, the amount of rotation of the fifth nut and the seventh nut becomes the same, and the inclination of the left and right front and rear end portions of the movable platen, which is the connection point of the fifth nut and the seventh nut, is corrected.

Further, if a difference occurs in the rotation amounts of the sixth nut and the eighth nut, a tension is generated in the fourth chain, and the rotation amounts of the sixth nut and the eighth nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the sixth nut and the eighth nut is restricted.
As a result, the amount of rotation of the sixth nut and the eighth nut becomes the same, and the inclinations of the right and left front and rear ends of the movable platen, which are the connection points of the sixth nut and the eighth nut, are corrected.

That is, in the invention of claim 8, four sets of movable platen inclination correcting means having the same configuration as that of the invention of claim 1 are provided, and one set is arranged on the front, rear, left and right of the movable plate.
Therefore, according to the eighth aspect of the present invention, it is possible to prevent the movable plate from tilting to either side of the left and right end portions due to the eccentric load, and to cause the movable plate to tilt to either side of the front and rear end portions due to the eccentric load. Can be prevented, and the horizontal state of the movable platen can be maintained.

By the way, the length (mounting cost) of the part where the first to fourth chains are respectively hung on the first to eighth sprockets is ½ or more of the outer circumference of the sprocket.
On the other hand, in the invention of claim 5, the length (mounting allowance) of the portion where the chain is hung on the first to fourth sprockets is ¼ of the outer circumference of the sprocket.

Here, if the chain and sprocket have a small allowance, when tension is generated in the chain, the sprocket and chain are disengaged and the sprocket is likely to jump, and the chain tension does not propagate to the sprocket. There is a fear.
When the chain and sprocket have a large allowance, when the chain is tensioned, the sprocket and chain will not be engaged and the sprocket will be less likely to skip teeth. Propagate.

Therefore, in the invention of claim 8, compared to the invention of claim 5, since the span between the chain and the sprocket is large as described above, the sprocket is less likely to cause tooth skipping, and the chain tension is accurately applied to the sprocket. Due to the propagation, the rotation of the nut is definitely regulated.
Therefore, according to the eighth aspect of the present invention, the inclination of the movable plate can be corrected more reliably than the fifth aspect of the present invention.

(Claim 9: Corresponds to the fifth embodiment or the seventh embodiment)
The fifth to eighth screw shafts are screwed with fifth to eighth nuts, respectively. The fifth to eighth screw shafts are inserted through the slide plate. The fifth to eighth nuts are connected to the slide plate so as to be rotatable in a horizontal plane. And the feed screw mechanism is comprised from the slide plate, the 5th screw shaft, and the 5th nut. Moreover, the feed screw mechanism is comprised from the slide plate, the 6th screw shaft, and the 6th nut. Further, a feed screw mechanism is constituted by the slide plate, the seventh screw shaft, and the seventh nut. Moreover, the feed screw mechanism is comprised from the slide plate, the 8th screw shaft, and the 8th nut.

  The ninth to twelfth sprockets and the thirteenth to sixteenth sprockets are attached and fixed to the fifth to eighth nuts in two upper and lower stages, respectively. The fifth chain is wound around the ninth sprocket and the tenth splot without slack. Further, the sixth chain is wound around the eleventh sprocket and the twelfth splot without slack. Further, the seventh chain is wound around the thirteenth sprocket and the fifteenth splot without slack. Further, the eighth chain is wound around the fourteenth sprocket and the sixteenth splot without slack.

Here, for example, it is assumed that the fifth nut and the sixth nut are arranged at the front left and right ends of the slide plate, and the seventh nut and the eighth nut are arranged at the rear left and right ends of the slide plate.
Then, similarly to the third nut and the fourth nut in the invention of claim 2, if a difference occurs in the rotation amount of the fifth nut and the sixth nut, a tension is generated in the fifth chain, corresponding to the difference in the rotation amount. Due to the applied tension, the rotations of the fifth nut and the sixth nut are regulated so that the rotation amounts of the fifth nut and the sixth nut become the same.
As a result, the amount of rotation of the fifth nut and the sixth nut becomes the same, and the inclination of the left and right ends of the front side of the slide plate, which is the connection point of the fifth nut and the sixth nut, is corrected.

Further, if a difference occurs in the rotation amounts of the seventh nut and the eighth nut, a tension is generated in the sixth chain, and the rotation amounts of the seventh nut and the eighth nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the seventh nut and the eighth nut is restricted.
As a result, the amount of rotation of the seventh nut and the eighth nut becomes the same, and the inclination of the left and right ends of the rear side of the slide plate, which is the connection point of the seventh nut and the eighth nut, is corrected.

Further, if a difference occurs in the rotation amounts of the fifth nut and the seventh nut, a tension is generated in the seventh chain, and the rotation amounts of the fifth nut and the seventh nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the fifth nut and the seventh nut is restricted.
As a result, the amount of rotation of the fifth nut and the seventh nut becomes the same, and the inclination of the left and right front and rear ends of the slide plate, which is the connection point of the fifth nut and the seventh nut, is corrected.

Further, if a difference occurs in the rotation amounts of the sixth nut and the eighth nut, a tension is generated in the eighth chain, and the rotation amounts of the sixth nut and the eighth nut are made the same by the tension corresponding to the difference in the rotation amount. Thus, the rotation of the sixth nut and the eighth nut is restricted.
As a result, the amount of rotation of the sixth nut and the eighth nut becomes the same, and the inclination of the right and left front and rear ends of the slide plate, which is the connection point of the sixth nut and the eighth nut, is corrected.

That is, in the ninth aspect of the invention, four sets of slide plate inclination correcting means having the same configuration as that of the second aspect of the invention are provided, and one set is arranged on each of the front, rear, left and right sides of the slide plate.
Therefore, according to the invention of claim 9, the slide plate is prevented from being inclined to either side of the left and right end portions due to the eccentric load, and the slide plate is inclined to either side of the front and rear end portions due to the eccentric load. Can be prevented, and the horizontal state of the slide plate can be maintained.

By the way, the length (mounting allowance) of the portion where the fifth to eighth chains are respectively hung on the ninth to sixteenth sprockets is ½ or more of the outer circumference of the sprocket.
On the other hand, in the invention of claim 6, the length (mounting allowance) of the portion where the chain is hung on the fifth to eighth sprockets is 1/4 of the outer circumference of the sprocket.

Here, if the chain and sprocket have a small allowance, when tension is generated in the chain, the sprocket and chain are disengaged and the sprocket is likely to jump, and the chain tension does not propagate to the sprocket. There is a fear.
When the chain and sprocket have a large allowance, when the chain is tensioned, the sprocket and chain will not be engaged and the sprocket will be less likely to skip teeth. Propagate.

Therefore, in the invention of claim 9, compared to the invention of claim 6, since the span between the chain and the sprocket is large as described above, the sprocket is less likely to cause tooth skipping, and the chain tension is accurately applied to the sprocket. Due to the propagation, the rotation of the nut is definitely regulated.
Therefore, according to the ninth aspect of the invention, the inclination of the slide plate can be corrected more reliably than the sixth aspect of the invention.

(Claim 10: corresponds to the seventh embodiment)
According to the tenth aspect of the invention, both of the actions and effects of the eighth and ninth aspects of the invention can be obtained.

(Claim 11: Corresponds to fourth to seventh embodiments)
According to the invention of claim 11, since the screw shaft is shared, the number of screw shafts can be reduced and the manufacturing cost of the press apparatus can be reduced.

(Claim 12: Corresponds to the first, third, sixth and seventh embodiments)
In the twelfth aspect of the present invention, when the piston is extended from the cylinder, the movable plate connected and fixed to the tip of the piston is driven by the piston and moves toward the fixed plate.

(Claim 13: corresponds to the second, fourth and fifth embodiments)
In the invention of claim 13, the feed screw mechanisms having the same configuration are constituted by the movable platen, the screw shafts, and the nuts. When each feed screw mechanism is a right-hand thread, for example, each nut moves to the fixed platen side as the screw shaft rotates counterclockwise, and the movable platen on which each nut is mounted and fixed is also on the fixed platen side. Move to.

(Claim 14: Corresponds to first to seventh embodiments)
In the invention of claim 14, when the movable platen or the slide plate moves up and down, the guide member and the sliding member slide closely.
Therefore, when the sliding member is attached and fixed to the movable platen, it is possible to prevent the movable plate from being inclined due to the eccentric load by providing the guide member and the sliding member.
Further, the synergistic effect of the guide member and the sliding member and the movable plate inclination correcting means prevents the movable plate from being inclined due to the eccentric load, and the horizontal state of the movable plate can be reliably maintained.

Further, when the sliding member is attached and fixed to the slide plate, it is possible to prevent the slide plate from being inclined due to the eccentric load by providing the guide member and the sliding member.
Then, the synergistic effect of the guide member and the sliding member and the slide plate tilt correcting means prevents the slide plate from tilting due to the eccentric load, and can maintain the horizontal state of the slide plate reliably.
In other words, by providing the inclination correction means, it is possible to reduce the burden on the guide member and the sliding member, so that the guide member and the sliding member can be reduced in size.

(Claim 15: Corresponds to first to third, fifth to seventh embodiments)
According to the invention of claim 15, by providing the toothed idler, it is possible to prevent the chain from interfering with the mold.

(Explanation of terms)
The correspondence between the constituent elements described in [Means for Solving the Problems] described above and the constituent members described in [Best Mode for Carrying Out the Invention] described below is as follows. .

The “fixed platen” corresponds to the upper fixed platen 11 or the lower fixed platen 12.
The “driving means” corresponds to the hydraulic cylinder 21 and the piston 22 in the first, third, sixth, and seventh embodiments, and corresponds to the gears 55 to 59 and the servo motor 60 in the second embodiment. The embodiment and the fifth embodiment correspond to the gears 91 to 99 and the servo motor 100.
The “first and second nuts” in claim 1 correspond to the nuts 27 and 29, respectively.
The “first and second screw shafts” in claim 1 correspond to the screw shafts 19 and 20, respectively.
The “first and second sprockets” of claim 1 correspond to the sprockets 31 and 33, respectively.

The “third and fourth nuts” in claim 2 correspond to the nuts 28 and 30, respectively.
The “third and fourth screw shafts” in claim 2 correspond to the screw shafts 19 and 20, respectively.
The “third and fourth sprockets” of claim 2 correspond to the sprockets 32 and 34, respectively.

The “first to fourth nuts” in claims 5 and 8 correspond to four nuts constituting the inclination correction mechanisms RMc ′ and RMd ′ to RMg ′.
The “first to fourth screw shafts” in claims 5 and 8 correspond to the screw shafts 19, 20, 81, and 82, respectively.

The “fifth to eighth nuts” in claims 6 and 9 correspond to the nuts 28, 30, 105, and 106, respectively.
The “fifth to eighth screw shafts” of claims 6 and 9 correspond to the screw shafts 19, 20, 81, 82, respectively.
The “fifth to eighth sprockets” of claim 6 correspond to the sprockets 32, 34, 107, and 108, respectively.

The “first to eighth sprockets” of claim 8 correspond to the eight sprockets constituting the inclination correction mechanisms RMd ′ to RMg ′.
The “first to fourth chains” in claim 8 correspond to the four chains constituting the inclination correction mechanisms RMd ′ to RMg ′.

The ninth to sixteenth sprockets of claim 9 correspond to the sprockets 32, 34, 107, 108, and 131 to 134, respectively.
The “fifth to eighth chains” of claim 9 correspond to the chains 135 to 138, respectively.
The “guide member” corresponds to the guide shafts 15 to 18 in the first to third embodiments, and corresponds to the guide bars 109 to 112 in the fourth to seventh embodiments.

  Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In each embodiment, the same constituent members are denoted by the same reference numerals, and redundant description of the same content is omitted.

(First embodiment)
FIG. 1 is a top view of a multi-stage (two-stage) press apparatus 10 according to the first embodiment.
FIG. 2 is a front view of the press device 10 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
FIG. 3 is a left side view of the press device 10 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
FIG. 4 is a longitudinal sectional view of the slide guide mechanisms SGa to SGh of the first embodiment.
FIG. 5 is a longitudinal sectional view of the feed screw mechanisms SMa to SMd of the first embodiment.

FIG. 6 is a top view of the movable platen 13 of the first embodiment.
FIG. 7 is a top view of the slide plate 14 of the first embodiment.
FIG. 8 is a longitudinal sectional view of the entire press apparatus 10 corresponding to FIG. 2, and is a sectional view taken along line XX shown in FIGS. 6 and 7.
FIG. 9 is a longitudinal sectional view of the entire press apparatus 10 corresponding to FIG. 3, and is a sectional view taken along the line YY shown in FIGS.
FIG. 10 is a front view of the press device 10 showing a state in which the movable platen 13 and the slide plate 14 are pushed down.

  A press apparatus (press machine) 10 according to the first embodiment includes an upper fixed platen 11, a lower fixed platen 12, a movable platen 13, a slide plate (press plate) 14, guide shafts 15 to 18, screw shafts 19 and 20, and a hydraulic cylinder. 21, piston 22, upper mold 23a, lower mold 23b, upper mold 24a, lower mold 24b, sliding member 25, mounting member 26, nuts 27-30, sprockets 31-34, mounting members 35, 36, cross roller guide 37 , Toothed idlers 38 to 41, chains 42 and 43, slide guide mechanisms SGa to SGh, feed screw mechanisms SMa to SMd, inclination correction mechanisms RMa and RMb, and the like.

Each of the panels 11 to 13 and the slide plate 14 are made of a rectangular thick steel plate, and the lower fixed plate 12, the slide plate 14, the movable plate 13 and the upper fixed plate 11 are arranged in this order from the lower side to the upper side of the factory floor B. The lower fixed platen 12 is placed on the press machine 10 in the factory.
In addition, each board 11-13 and the slide plate 14 are the same plane shapes. The fixed plates 11 and 12 having the same plate thickness are formed thicker than the movable plate 13 and the slide plate 14 having the same plate thickness.
The vicinity of the four corners of each fixed platen 11 and 12 is connected and fixed by guide shafts 15 to 18 made of columnar steel. In addition, both end portions of the screw shafts 19 and 20 are connected and fixed so as not to rotate in the vicinity of both left and right end portions, which are the longitudinal directions of the fixed plates 11 and 12. Therefore, the fixed plates 11 and 12 are arranged in parallel in the vertical direction.

  A support base (not shown) may be installed on the floor B of the factory, and the lower fixed platen 12 may be placed on the support base. Further, in order to connect and fix each of the fixed plates 11 and 12 to each of the guide shafts 15 to 18 and each of the screw shafts 19 and 20, welding is used, or male screws are provided at both ends of each of the guide shafts 15 to 18. The male screws at both ends of the guide shafts 15 to 18 and the screw shafts 19 and 20 may be inserted into through holes formed in the fixed plates 11 and 12 and screwed into the nuts.

A hydraulic cylinder 21 is placed and fixed on the center portion of the upper fixed platen 11.
The piston 22 projecting downward from the hydraulic cylinder 21 is inserted into a through hole 11 a formed in the upper fixed platen 11, and the tip of the piston 22 is connected and fixed to the upper surface side of the movable platen 13.

An upper die 23a is attached and fixed to the lower surface side of the movable platen 13, and a lower die 23b is attached and fixed to the upper surface side of the slide plate 14, and a pair of upper and lower forming dies is constituted by the upper die 23a and the lower die 23b. .
An upper die 24a is attached and fixed to the lower surface side of the slide plate 14, and a lower die 24b is attached and fixed to the upper surface side of the lower fixed platen 12, and a pair of upper and lower forming dies is constituted by the upper die 24a and the lower die 24b. Yes.

The guide shafts 15 to 18 are inserted through through holes 13 a formed in the vicinity of the four corners of the movable platen 13 and through through holes 14 a formed in the vicinity of the four corners of the slide plate 14.
Cylindrical sliding members 25 are fitted into the through holes 13a and 14a, and ring-shaped attachment members 26 are fitted to the upper and lower ends of the sliding members 25. The members 25 and 26 are formed in the through holes 13a and 14a, respectively. It is attached to 14a so as not to fall off.

Each guide shaft 15 to 18 is inserted through a through hole 25 a of the sliding member 25.
The movable platen 13, the slide plate 14, the guide shafts 15 to 18, the sliding member 25, and the mounting member 26 constitute eight slide guide mechanisms SGa to SGh having the same configuration.

The screw shafts 19 and 20 are inserted in through holes 13b and 13c formed in the vicinity of both left and right ends in the longitudinal direction of the movable platen 13, and are formed in the vicinity of both left and right ends in the longitudinal direction of the slide plate 14. The through holes 14b and 14c are inserted.
Nuts 27 and 28 are screwed to the screw shaft 19, and nuts 29 and 30 are screwed to the screw shaft 20.
Each sprocket 31-34 is attached and fixed to each nut 27-30.

A ring-shaped attachment member 35 is attached and fixed to the lower ends of the nuts 27 to 30.
On the upper surface side of the movable platen 13 and the slide plate 14, a ring-shaped attachment member 36 is attached and fixed so as to surround the through holes 13b, 13c, 14b, and 14c.
The attachment member 35 is fitted into the attachment member 36, and each attachment member 35, 36 is connected via a ring-shaped cross roller guide 37.

By means of the mounting members 35 and 36 and the cross roller guide 37, the nuts 27 and 29 are connected to the movable plate 13 so as to be rotatable in a horizontal plane, and the nuts 28 and 30 are connected to the slide plate 14 in a horizontal plane. It is connected so that it can rotate.
The movable plate 13, the slide plate 14, the screw shafts 19 and 20, the nuts 27 to 30, the mounting members 35 and 36, and the cross roller guide 37 constitute four feed screw mechanisms SMa to SMd having the same configuration. ing.

On the upper surface side of the movable platen 13 and the slide plate 14, toothed idlers 38 and 39 are attached to the left and right sides of the guide shaft 15, and toothed idlers 40 and 41 are attached to the left and right sides of the guide shaft 16.
The toothed idlers 38 to 41 are rotatable with respect to the movable platen 13 and the slide plate 14 in a horizontal plane.

In the movable platen 13, a chain 42 is wound around the sprockets 31 and 33 fixedly attached to the nuts 27 and 29 and the toothed idlers 38 to 41 without slack.
The feed screw mechanisms SMa and SMb, the sprockets 31 and 33, the toothed idlers 38 to 41, and the chain 42 constitute a tilt correction mechanism RMa for the movable platen 13.

In the slide plate 14, a chain 43 is wound around the sprockets 32 and 34 attached to the nuts 28 and 30 and the toothed idlers 38 to 41 without slack.
The feed screw mechanisms SMc and SMd, the sprockets 32 and 34, the toothed idlers 38 to 41, and the chain 43 constitute an inclination correction mechanism RMb for the slide plate 14.

[Operations and effects of the first embodiment]
According to the first embodiment, the following actions and effects can be obtained.

[1-1]
In order to use the press device 10, hydraulic pressure is supplied from a hydraulic supply device (not shown) to the hydraulic cylinder 21 with a workpiece (not shown) such as a metal plate placed on the lower dies 23b and 24b. The piston 22 is extended.
Then, the movable platen 13 connected and fixed to the tip of the piston 22 is driven and lowered by the piston 22, and the slide plate 14 is driven and lowered by the descent of the movable platen 13.

As a result, as shown in FIG. 10, the slide plate 14 is pressed against the lower fixed platen 12, and the workpiece is sandwiched between the molds 24 b and 24 a and pressed, and the slide plate 14 is pressed. Then, the movable platen 13 is pressed, and the workpiece is sandwiched between the molds 23b and 23a and pressed.
As described above, in the pressing device 10, a two-stage pressing device is configured by providing one slide plate 14 between the lower fixed platen 12 and the movable platen 13.

[1-2]
A nut 27 is screwed to the screw shaft 19, and a nut 29 is screwed to the screw shaft 20.
Further, the nuts 27 and 29 are connected to the movable platen 13 so as to be rotatable in a horizontal plane by the mounting members 35 and 36 and the cross roller guide 37.
The movable plate 13, the screw shaft 19, the nut 27, the mounting members 35 and 36, and the cross roller guide 37 constitute the feed screw mechanism SMa. The movable platen 13, the screw shaft 20, the nut 29, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMb.

Therefore, when the movable platen 13 is moved up and down, the nuts 27 and 29 are rotated in the same direction by the same rotation amount as the movable plate 13 is moved up and down.
At this time, if an eccentric load is applied to the movable platen 13, the left and right ends, which are the longitudinal direction of the movable platen 13, are likely to be inclined.
And if inclination arises in the right and left both ends of the movable board 13, a difference will arise in the rotation amount (rotation angle) of each nut 27,29.

For example, in a state where the left end side of the movable platen 13 (where the nut 27 is connected) is lifted compared to the right end side (where the nut 29 is connected), the rotation amount of the nut 27 is larger than the rotation amount of the nut 29. Get smaller.
Conversely, in a state where the right end side of the movable platen 13 (where the nut 29 is connected) is lifted compared to the left end side (where the nut 27 is connected), the rotation amount of the nut 29 is larger than the rotation amount of the nut 27. Become smaller.

Here, a sprocket 31 is attached and fixed to the nut 27, and a sprocket 33 is attached and fixed to the nut 29.
A chain 42 is wound around each sprocket 31 and 33 and each toothed idler 38 to 41 without slack.
The feed screw mechanisms SMa and SMb, the sprockets 31 and 33, the toothed idlers 38 to 41, and the chain 42 constitute a tilt correction mechanism RMa for the movable platen 13.

Therefore, when a difference occurs in the rotation amount of each nut 27, 29, tension is generated in the chain 42, and each nut 27, 29 is made to have the same rotation amount by the tension corresponding to the difference in the rotation amount. The rotation of 27 and 29 is restricted.
As a result, the rotation amounts of the nuts 27 and 29 become the same, and the inclination of the left and right end portions of the movable platen 13 where the nuts 27 and 29 are connected is corrected.
As described above, by providing the tilt correction mechanism RMa, it is possible to prevent the movable platen 13 from tilting to either side of the left and right ends in the longitudinal direction due to the eccentric load.

[1-3]
A nut 28 is screwed to the screw shaft 19, and a nut 30 is screwed to the screw shaft 20.
Further, the nuts 28 and 30 are connected to the slide plate 14 so as to be rotatable in a horizontal plane by the mounting members 35 and 36 and the cross roller guide 37.
The slide plate 14, the screw shaft 19, the nut 28, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMc. The slide plate 14, the screw shaft 20, the nut 30, the attachment members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMd.

Therefore, when the slide plate 14 moves up and down, the nuts 28 and 30 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, if an eccentric load is applied to the slide plate 14, the left and right ends, which are the longitudinal direction of the slide plate 14, are likely to be inclined.
Then, when the left and right end portions of the slide plate 14 are inclined, a difference occurs in the amount of rotation (rotation angle) of the nuts 28 and 30.

For example, when the left end side of the slide plate 14 (where the nut 28 is connected) is lifted compared to the right end side (where the nut 30 is connected), the rotation amount of the nut 28 is larger than the rotation amount of the nut 30. Get smaller.
Conversely, in a state where the right end side of the slide plate 14 (where the nut 30 is connected) is lifted compared to the left end side (where the nut 28 is connected), the amount of rotation of the nut 30 is greater than the amount of rotation of the nut 28. Become smaller.

Here, a sprocket 32 is attached and fixed to the nut 28, and a sprocket 34 is attached and fixed to the nut 30.
A chain 43 is wound around each sprocket 32, 34 and each toothed idler 38-41 without slack.
The feed screw mechanisms SMc and SMd, the sprockets 32 and 34, the toothed idlers 38 to 41, and the chain 43 constitute an inclination correction mechanism RMb for the slide plate 14.

Therefore, if a difference occurs in the rotation amount of each nut 28, 30, tension is generated in the chain 43, and each nut 28, 30 has the same rotation amount by the tension corresponding to the difference in rotation amount. The rotation of 28 and 30 is restricted.
As a result, the rotation amounts of the nuts 28 and 30 become the same, and the inclinations of the left and right ends of the slide plate 14 that are the connection points of the nuts 28 and 30 are corrected.

By the way, in the two-stage press device 10, the slide plate 14 is not driven directly by the piston 22, but is moved by the movement of the movable plate 13. This tends to cause tilting due to eccentric load.
However, by providing the tilt correction mechanism RMb, it is possible to prevent the slide plate 14 from tilting to either side of the left and right ends in the longitudinal direction due to the eccentric load.

[1-4]
The guide shafts 15 to 18 are inserted through through holes 13 a formed in the vicinity of the four corners of the movable platen 13 through the sliding members 25 and slide into the through holes 14 a formed in the vicinity of the four corners of the slide plate 14. It is inserted through the member 25.
The movable platen 13, the guide shafts 15 to 18, the sliding member 25, and the mounting member 26 constitute slide guide mechanisms SGa to SGd. The slide plate 14, the guide shafts 15 to 18, the slide member 25, and the attachment member 26 constitute slide guide mechanisms SGe to SGh.

Therefore, when the movable platen 13 moves up and down, the inner wall surface of the through hole 25a of the sliding member 25 fitted into the through hole 13a slides in close contact with the outer peripheral surface of each guide shaft 15-18.
Further, when the slide plate 14 moves up and down, the inner wall surface of the through hole 25a of the sliding member 25 fitted in the through hole 14a slides in close contact with the outer peripheral surface of each guide shaft 15-18.

As a result, by providing each slide guide mechanism SGa to SGd, it is possible to prevent the movable platen 13 from being inclined due to an eccentric load.
Further, by providing each slide guide mechanism SGe to SGh, it is possible to prevent the slide plate 14 from being inclined due to an eccentric load.

[1-5]
In the first embodiment, the synergistic effect of the inclination correction mechanism RMa and each of the slide guide mechanisms SGa to SGd prevents the movable platen 13 from being inclined due to the eccentric load, and the horizontal state of the movable platen 13 can be reliably maintained.
Further, the synergistic effect of the inclination correction mechanism RMb and each of the slide guide mechanisms SGe to SGh prevents the slide plate 14 from being inclined due to the eccentric load, and the horizontal state of the slide plate 14 can be reliably maintained.

Therefore, according to the first embodiment, even if an eccentric load is applied to the movable platen 13 or the slide plate 14, no inclination occurs in the movable platen 13 and the slide plate 14, and therefore, between the upper die 23a and the lower die 23b and the upper die. Each pressurizing force between the 24a and the lower mold 24b is not insufficient, and the upper molds 23a and 24a and the lower molds 23b and 24b are not misaligned. , 23b, 24a, 24b), and the like, such as shortening of the mold life due to uneven wear, can be prevented.
In particular, in the case of press-molding a part having a complicated shape such as an automobile part, a slight inclination of the movable platen 13 or the slide plate 14 causes a significant decrease in processing accuracy. However, according to the first embodiment, the part is complicated. High-precision pressing can be performed on shaped parts.

[1-6]
In the first embodiment, by providing the inclination correction mechanisms RMa and RMb, it is possible to reduce the burden on the slide guide mechanisms SGa to SGh, so that the slide guide mechanisms SGa to SGh can be downsized.

And since the structure of each inclination correction mechanism RMa, RMb is simple and inexpensive, even if each inclination correction mechanism RMa, RMb is provided, the manufacturing cost of the press apparatus 10 hardly increases.
Further, since no special maintenance activity is required to maintain the operations of the inclination correction mechanisms RMa and RMb, the maintenance cost of the press apparatus 10 hardly increases even if the inclination correction mechanisms RMa and RMb are provided.

Further, since each inclination correction mechanism RMa, RMb does not protrude outward from the movable platen 13 and the slide plate 14, even if each inclination correction mechanism RMa, RMb is provided, the outer dimensions of the press apparatus 10 are not changed, and the press apparatus The installation cost of 10 does not increase.
Therefore, according to the first embodiment, it is possible to provide the press device 10 capable of accurately correcting the inclination of the movable platen 13 or the slide plate 14 due to the eccentric load and performing high-precision press processing at low cost.

[1-7]
The reason why the toothed idlers 38 to 41 are provided in the movable platen 13 is to prevent the chain 42 wound around the sprockets 31 and 33 from interfering with the piston 22 as shown in FIG. .

[1-8]
The toothed idlers 38 to 41 are provided on the slide plate 14 in order to prevent the chain 42 wound around the sprockets 32 and 34 from interfering with the lower mold 23b as shown in FIG. is there.

(Second Embodiment)
FIG. 11 is a top view of a multi-stage (two-stage) press device 50 according to the second embodiment.
FIG. 12 is a front view of the press device 50 showing a state where the movable platen 13 and the slide plate 14 are pulled up.
FIG. 13 is a left side view of the press device 50 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
14 is a longitudinal sectional view of the entire pressing device 50 corresponding to FIG. 13, and is a sectional view taken along line YY shown in FIG.
The press device 50 of the second embodiment differs from the press device 10 of the first embodiment only in the following points.

(2-1)
The press device 50 according to the second embodiment includes an upper fixed platen 11, a lower fixed platen 12, a movable platen 13, a slide plate 14, guide shafts 15 to 18, screw shafts 19 and 20, an upper die 23a, a lower die 23b, and an upper die. 24a, lower die 24b, sliding member 25, mounting member 26, nuts 28 and 30, sprockets 32 and 34, mounting members 35 and 36, cross roller guide 37, toothed idlers 38 to 41, chain 43, slide guide mechanism SGa To SGh, feed screw mechanisms SMc and SMd, tilt correction mechanism RMb, bearing members 51 to 54, gears 55 to 59, servo motor (motor) 60, nuts 61 and 62, feed screw mechanisms SMe and SMf, and the like. .

  That is, the press device 50 of the second embodiment is different from the press device 10 of the first embodiment in that the hydraulic cylinder 21, the piston 22, the nuts 27 and 29, the sprockets 31 and 33, the chain 42, the feed screw mechanisms SMa and SMb, the inclination. The correction mechanism RMa is omitted, and instead, bearing members 51 to 54, gears 55 to 59, a servo motor (electric motor) 60, nuts 61 and 62, and a feed screw mechanism SMe and SMf are added.

(2-2)
The upper fixed platen 11 of the second embodiment is formed thinner than the first embodiment. Further, the movable platen 13 of the second embodiment is formed thicker than that of the first embodiment.

(2-3)
Each bearing member 51 to 54 has a built-in cross roller guide.
Bearing members 51 and 52 are fixedly attached to the upper surface of the upper fixed platen 11.
The upper end portions of the screw shafts 19 and 20 are inserted into the bearing members 51 and 52 through the through holes 11 b formed in the upper fixed platen 11. The gears 55 and 56 are attached and fixed to the tip portions of the screw shafts 19 and 20 protruding from the bearing members 51 and 52, respectively.

Bearing members 53 and 54 are attached and fixed inside the lower fixed platen 12.
Lower end portions of the screw shafts 19 and 20 are inserted into the bearing members 53 and 54, respectively.
Therefore, the upper ends of the screw shafts 19 and 20 are pivotally supported by the bearing members 51 and 52, and the lower ends of the screw shafts 19 and 20 are pivotally supported by the bearing members 53 and 54. , 20 are rotatable with respect to the fixed plates 11, 12.

(2-4)
Gears 57 and 58 are attached to the upper surface of the upper fixed platen 11 so as to be rotatable in a horizontal plane with respect to the upper fixed platen 11.
A servo motor 60 is attached and fixed above the upper fixed platen 11, and a gear 59 is attached and fixed to the motor shaft of the servo motor 60.
The gears 55 to 59 are arranged in a line. The gear 59 meshes with the gears 57 and 58, the gear 57 meshes with the gear 55, and the gear 58 meshes with the gear 56.

(2-5)
Nuts 61 and 62 are attached and fixed on the upper surface side of the movable platen 13 so as to surround the through holes 13b and 13c.
The nut 61 is screwed to the screw shaft 19, and the nut 62 is screwed to the screw shaft 20.
The movable plate 13, the screw shaft 19, and the nut 61 constitute a right-handed feed screw mechanism SMe. Further, the movable plate 13, the screw shaft 20, and the nut 62 constitute a right-handed feed screw mechanism SMf.

[Operation and Effect of Second Embodiment]
According to the second embodiment, in addition to the operations and effects of [1-3] [1-4] [1-8] of the first embodiment, the following operations and effects can be obtained.

[2-1]
As shown in FIG. 11, when the servo motor 60 rotates clockwise (arrow α direction), the gear 59 attached and fixed to the motor shaft of the servo motor 60 also rotates clockwise and meshes with the gear 59. The gears 57 and 58 rotated in the counterclockwise direction (arrow β direction), and the gears 55 and 56 engaged with the gears 57 and 58 rotated in the clockwise direction (arrow α direction) The screw shafts 19 and 20 attached and fixed to the gears 55 and 56 also rotate in the clockwise direction (arrow α direction).
On the contrary, when the servo motor 60 is rotated in the counterclockwise direction, the screw shafts 19 and 20 are also rotated in the counterclockwise direction.
That is, the screw shafts 19 and 20 are rotationally driven by the servo motor 60 via the gears 55 to 59.

Here, since the two feed screw mechanisms SMe, SMf having the same configuration composed of the movable platen 13, the screw shafts 19, 20, and the nuts 61, 62 are right-handed screws, the screw shafts 19, 20 are rotated counterclockwise. As the nut rotates, each nut 61, 62 moves downward, which is the direction away from the upper fixed platen 11.
Then, the movable platen 13 to which the nuts 61 and 62 are attached and fixed is lowered, and the slide plate 14 is driven and lowered by the lowering of the movable platen 13.
On the contrary, when the screw shafts 19 and 20 are rotated in the clockwise direction, the nuts 61 and 62 are moved upward in a direction approaching the upper fixed platen 11, and the movable platen 13 is raised.

[2-2]
The platen of the movable plate 13 is formed thick.
The feed screw mechanisms SMe, SMf directly drive the left and right ends (attachment locations of the nuts 61, 62) in the longitudinal direction of the movable platen 13 to move the movable platen 13 up and down.
Therefore, even if an eccentric load is applied when the movable platen 13 moves up and down, the left and right screw shafts 19 and 20 rotate in the same direction, and the movable platen 13 does not tilt to either side of the left and right ends.

[2-3]
In the second embodiment, the movable platen 13 can be reliably prevented from being inclined due to the eccentric load by the synergistic effect of [2-2] and the slide guide mechanisms SGa to SGd.
In the second embodiment, as in the first embodiment, the synergistic effect of the inclination correction mechanism RMb and the slide guide mechanisms SGe to SGh can reliably prevent the slide plate 14 from being inclined due to the eccentric load.
Therefore, according to the second embodiment, the same operation and effect as the above [1-5] of the first embodiment can be obtained.

[2-4]
In the second embodiment, the movable platen 13 is formed thick to provide the feed screw mechanisms SMe and SMf and the inclination correction mechanism RMb, thereby reducing the burden on the slide guide mechanisms SGa to SGh. Therefore, each slide guide mechanism SGa-SGh can be reduced in size.

And the structural change of said (2-2)-(2-5) is realizable at low cost.
Further, even if the structural changes (2-2) to (2-5) are made, the maintenance cost of the press device 50 is hardly increased, and the external dimensions of the press device 50 are hardly changed, so that the installation cost is not increased. .
Therefore, according to the second embodiment, it is possible to provide the press device 50 capable of accurately correcting the inclination of the movable platen 13 or the slide plate 14 due to the eccentric load and performing high-precision press processing at low cost.

(Third embodiment)
FIG. 15 is a front view of the multi-stage (two-stage) press device 70 of the third embodiment, and shows a state where the movable platen 13 and the slide plate 14 are pulled up.
FIG. 16 is a left side view of the press device 70 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.

The press device 70 of the third embodiment differs from the press device 10 of the first embodiment in that an inclination correction mechanism RMa is provided on the lower surface side of the movable platen 13 and an inclination correction mechanism RMb is on the lower surface side of the slide plate 14. It is only the point provided in.
Further, even if the tilt correction mechanism RMa is provided on the lower surface side of the movable platen 13, the same operation and effect as [1-2] of the first embodiment can be obtained, and the tilt correction mechanism RMb is provided on the lower surface side of the slide plate 14. Even if provided, the same operation and effect as the above [1-3] of the first embodiment can be obtained.
Therefore, according to the third embodiment, the same operation and effect as the first embodiment can be obtained.

(Fourth embodiment)
FIG. 17 is a top view of a multi-stage (two-stage) press device 80 according to the fourth embodiment.
FIG. 18 is a front view of the press device 80 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
FIG. 19 is a left side view of the press device 80 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
FIG. 20 is a top view of the movable platen 13 of the fourth embodiment.
FIG. 21 is a top view of the slide plate 14 of the fourth embodiment.
22 is a longitudinal sectional view of the entire pressing device 80 corresponding to FIG. 18, and is a sectional view taken along line XX shown in FIGS.
FIG. 23 is a longitudinal sectional view of the entire press device 80 corresponding to FIG. 19, and is a sectional view taken along the line YY shown in FIGS.
The press device 80 of the fourth embodiment differs from the press device 10 of the first embodiment only in the following points.

(4-1)
The press device 80 of the fourth embodiment includes an upper fixed platen 11, a lower fixed platen 12, a movable platen 13, a slide plate 14, screw shafts 19 and 20, an upper die 23a, a lower die 23b, an upper die 24a, a lower die 24b, Nuts 28, 30, sprockets 32, 34, mounting members 35, 36, cross roller guide 37, chain 43, feed screw mechanisms SMc, SMd, screw shafts 81, 82, bearing members 83-90, gears 91-99, servo motor (Electric motor) 100, nuts 101 to 106, sprockets 107 and 108, guide bars 109 to 112, sliding members 113 to 120, feed screw mechanisms SMg to SMl, inclination correction mechanism RMc, slide guide mechanisms SGi to SGp, etc. ing.

  That is, the press device 80 of the fourth embodiment is different from the press device 10 of the first embodiment in that the guide shafts 15 to 18, the hydraulic cylinder 21, the piston 22, the sliding member 25, the mounting member 26, the nuts 27 and 29, and the sprocket. 31 and 33, toothed idlers 38 to 41, chain 42, slide guide mechanisms SGa to SGh, feed screw mechanisms SMa and SMb, inclination correction mechanisms RMa and RMb are omitted, and screw shafts 81 and 82, bearing members are used instead. 83-90, gears 91-99, servo motor (electric motor) 100, nuts 101-106, sprockets 107, 108, guide bars 109-112, sliding members 113-120, feed screw mechanisms SMg-SMl, tilt correction mechanism RMc The slide guide mechanisms SGi to SGp are added.

(4-2)
The upper fixed platen 11 of the fourth embodiment is formed thinner than the first embodiment. Further, the movable platen 13 of the fourth embodiment is formed thicker than that of the first embodiment. The fixed plates 11 and 12 of the fourth embodiment are formed to have a greater width in the depth direction than the movable plate 13 and the slide plate 14.

(4-3)
In the vicinity of the four corners of each fixed platen 11, 12, both end portions of each screw shaft 19, 20, 81, 82 are rotatably connected.
The bearing members 83 to 86 are attached and fixed to the upper surface side of the upper fixed platen 11.
The upper ends of the screw shafts 19, 20, 81, 82 are inserted into the bearing members 83 to 86 through through holes 11 b formed in the upper fixed platen 11. The gears 91 to 94 are attached and fixed to the tip portions of the screw shafts 19, 20, 81, and 82 protruding from the bearing members 83 to 86.

The bearing members 87 to 90 are attached and fixed inside the lower fixed platen 12.
The lower ends of the screw shafts 19, 20, 81, 82 are inserted through the bearing members 87-90.
Therefore, the upper ends of the screw shafts 19, 20, 81, 82 are pivotally supported by the bearing members 83-86, and the lower ends of the screw shafts 19, 20, 81, 82 are supported by the bearing members 87-90. The screw shafts 19, 20, 81, 82 are pivotally supported with respect to the fixed plates 11, 12.
The bearing members 86 and 90 are not shown.

(4-4)
The gears 95 to 98 are attached to the upper surface side of the upper fixed platen 11 so as to be rotatable in a horizontal plane with respect to the upper fixed platen 11.
A servo motor 100 is attached and fixed above the upper fixed platen 11, and a gear 99 is attached and fixed to the motor shaft of the servo motor 100.
The gears 91 to 99 are arranged such that the gears 91 and 95, the gears 92 and 96, the gears 93 and 97, and the gears 94 and 98 are arranged radially with respect to the gear 99, and the gear 99 is the gears 95 to 98. The gear 95 meshes with the gear 91, the gear 96 meshes with the gear 92, the gear 97 meshes with the gear 93, and the gear 98 meshes with the gear 94.

(4-5)
The screw shafts 19, 20, 81, and 82 are inserted into through holes 13 d to 13 g formed in the vicinity of the four corners of the movable platen 13 and inserted into through holes 14 d to 14 g formed in the vicinity of the four corners of the slide plate 14. Has been.
The through holes 13g and 14g are not shown.
Nuts 101 to 104 are attached and fixed to the upper surface side of the movable platen 13 so as to surround the through holes 13d to 13g.
The nut 101 is screwed to the screw shaft 19, the nut 102 is screwed to the screw shaft 20, the nut 103 is screwed to the screw shaft 81, and the nut 104 is screwed to the screw shaft 82.

  The movable plate 13, the screw shaft 19, and the nut 101 constitute a right-handed feed screw mechanism SMg. Further, the movable plate 13, the screw shaft 20, and the nut 102 constitute a right-handed feed screw mechanism SMh. The movable plate 13, the screw shaft 81, and the nut 103 constitute a right-handed feed screw mechanism SMi. Further, the movable plate 13, the screw shaft 82, and the nut 104 constitute a right-hand feed screw mechanism SMj.

(4-6)
Each nut 105, 106 has the same configuration as each nut 28, 30.
A nut 105 is screwed to the screw shaft 81, and a nut 106 is screwed to the screw shaft 82.
A ring-shaped attachment member 35 is attached and fixed to the lower ends of the nuts 105 and 106.
On the upper surface side of the slide plate 14, a ring-shaped attachment member 36 is attached and fixed so as to surround each of the through holes 14d to 14g.
The attachment member 35 is fitted into the attachment member 36, and each attachment member 35, 36 is connected via a ring-shaped cross roller guide 37.

The nuts 28, 30, 105 and 106 are connected to the slide plate 14 so as to be rotatable in a horizontal plane by the mounting members 35 and 36 and the cross roller guide 37.
The four feed screw mechanisms SMc having the same configuration from the slide plate 14, the screw shafts 19, 20, 81, 82, the nuts 28, 30, 105, 106, the mounting members 35, 36, and the cross roller guide 37 are provided. SMd, SMk, and SMl are configured.

(4-7)
Each sprocket 107, 108 has the same configuration as each sprocket 32, 34.
The sprockets 107 and 108 are fixedly attached to the nuts 105 and 106, respectively.
In the slide plate 14, a chain 43 is wound around each sprocket 32, 34, 107, 108 fixed to each nut 28, 30, 105, 106 without slack.
The feed screw mechanisms SMc, SMd, SMk, SM1, sprockets 32, 34, 107, 108, and chain 43 constitute a tilt correction mechanism RMc for the slide plate 14.

(4-8)
The vicinity of the four corners of each fixed platen 11 and 12 is connected and fixed by guide bars 109 to 112 made of prismatic steel. Therefore, the fixed plates 11 and 12 are arranged in parallel in the vertical direction.
Each of the sliding members 113 to 120 has a concave cross section, and the sliding members 113 to 116 are attached and fixed to the outer peripheral four corners of the movable platen 13, and the sliding members 117 to 120 are attached to the outer peripheral four corners of the slide plate 14. Is fixed.
The guide bars 109 to 112 are fitted into the concave portions of the sliding members 113 to 116 and are fitted into the concave portions of the sliding members 117 to 120.
And 8 slide guide mechanisms SGi-SGp are comprised from the movable board 13, the slide plate 14, each guide bar 109-112, and the sliding members 113-120.

[Operations and effects of the fourth embodiment]
According to the fourth embodiment, the following actions and effects can be obtained.

[4-1]
As shown in FIG. 17, when the servo motor 100 rotates in the clockwise direction (arrow α direction), the gear 99 attached and fixed to the motor shaft of the servo motor 100 also rotates in the clockwise direction and meshes with the gear 99. The gears 95 to 98 rotated in the counterclockwise direction (arrow β direction), the gears 91 to 94 meshed with the gears 95 to 98 rotated in the clockwise direction (arrow α direction), The screw shafts 19, 20, 81, 82 attached and fixed to the gears 91 to 94 also rotate clockwise (arrow α direction).
On the contrary, when the servo motor 100 is rotated counterclockwise, the screw shafts 19, 20, 81, 82 are also rotated counterclockwise.
That is, the screw shafts 19, 20, 81, 82 are rotationally driven by the servo motor 100 via the gears 91 to 99.

Here, since the four feed screw mechanisms SMg to SMj having the same configuration composed of the movable platen 13, the screw shafts 19, 20, 81, and 82 and the nuts 101 to 104 are right-handed screws, the screw shafts 19, 20 are provided. , 81, 82 rotate in the counterclockwise direction, and the nuts 101 to 104 move downward, which is a direction away from the upper fixed platen 11.
Then, the movable platen 13 to which the nuts 101 to 104 are attached and fixed is lowered, and the slide plate 14 is driven and lowered as the movable platen 13 is lowered.
On the contrary, when each screw shaft 19, 20, 81, 82 rotates in the clockwise direction, each nut 101-104 moves upward, which is a direction approaching the upper fixed platen 11, and the movable platen 13 rises.

[4-2]
The platen of the movable plate 13 is formed thick.
Then, by the feed screw mechanisms SMg to SMj, the vicinity of the four corners of the movable platen 13 (attachment locations of the nuts 101 to 104) are directly driven, and the movable platen 13 moves up and down.
Therefore, even if an eccentric load is applied when the movable platen 13 moves up and down, the movable platen 13 not only tilts to either side of the left and right ends that are the longitudinal direction, but also the longitudinal direction that is the short direction (depth direction). The horizontal state of the movable platen 13 can be maintained without tilting to either side of both ends.

[4-3]
Each nut 28, 30, 105, 106 is screwed to each screw shaft 19, 20, 81, 82.
Further, the nuts 28, 30, 105, 106 are connected to the slide plate 14 so as to be rotatable in a horizontal plane by the mounting members 35, 36 and the cross roller guide 37.
The slide plate 14, the screw shaft 19, the nut 28, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMc. The slide plate 14, the screw shaft 20, the nut 30, the attachment members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMd. The slide plate 14, the screw shaft 81, the nut 105, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMk. The slide plate 14, the screw shaft 82, the nut 106, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMl.

Therefore, when the slide plate 14 moves up and down, the nuts 28, 30, 105, and 106 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, if an eccentric load is applied to the slide plate 14, the slide plate 14 tends to be inclined.
When the slide plate 14 is tilted, a difference occurs in the amount of rotation (rotation angle) of each nut 28, 30, 105, 106.

For example, when the left front end side of the slide plate 14 (the place where the nut 28 is connected) is lifted, the amount of rotation of the nut 28 is smaller than the amount of rotation of the nuts 30, 105, 106.
Further, in the state where the right front end side of the slide plate 14 (the place where the nut 30 is connected) is lifted, the amount of rotation of the nut 30 is smaller than the amount of rotation of each nut 28, 105, 106.
Further, in the state where the left rear end side of the slide plate 14 (the connection portion of the nut 105) is lifted, the amount of rotation of the nut 105 is smaller than the amount of rotation of each nut 28, 30, 106.
Further, in a state where the right rear end side of the slide plate 14 (the place where the nut 106 is connected) is lifted, the amount of rotation of the nut 106 is smaller than the amount of rotation of each nut 28, 30, 105.

Here, the sprockets 32, 34, 107, 108 are fixedly attached to the nuts 28, 30, 105, 106, respectively.
A chain 43 is wound around each sprocket 32, 34, 107, 108 without slack.
The feed screw mechanisms SMc, SMd, SMk, SM1, sprockets 32, 34, 107, 108, and chain 43 constitute a tilt correction mechanism RMc for the slide plate 14.

Therefore, if a difference occurs in the rotation amount of each nut 28, 30, 105, 106, tension is generated in the chain 43, and the rotation amount of each nut 28, 30, 105, 106 is caused by the tension corresponding to the difference in the rotation amount. The rotation of the nuts 28, 30, 105, 106 is restricted so that they are the same.
As a result, the rotation amounts of the nuts 28, 30, 105, 106 become the same, and the inclination of the vicinity of the four corners of the slide plate 14, which is the connection location of the nuts 28, 30, 105, 106, is corrected.

By the way, in the two-stage press device 80, the slide plate 14 is not driven directly by the servo motor 100, but is moved by the movement of the movable platen 13, so that the slide plate 14 is compared with the movable platen 13. Is more likely to be inclined due to the eccentric load.
Therefore, in the two-stage press device 10 of the first embodiment, as described in [1-3] above, by providing the inclination correction mechanism RMb, either of the left and right ends where the slide plate 14 is in the longitudinal direction due to the eccentric load. To prevent it from tilting to the other side.

On the other hand, in the fourth embodiment, by providing the tilt correction mechanism RMc, not only can the slide plate 14 be tilted to either side of the left and right ends in the longitudinal direction due to the eccentric load, but also the slide plate 14 Can be prevented from tilting to either side of the front and rear end portions, which are the short direction, and the horizontal state of the slide plate 14 can be maintained.
Therefore, according to the inclination correction mechanism RMc of the fourth embodiment, even when the width of the slide plate 14 in the front-rear direction (depth direction) is large, the inclination of the slide plate 14 is larger than that of the inclination correction mechanism RMb of the first embodiment. Can be corrected more reliably.

[4-4]
The guide bars 109 to 112 are fitted into the recesses of the sliding members 113 to 116 attached and fixed to the outer peripheral four corners of the movable platen 13, and the sliding members attached and fixed to the outer peripheral four corners of the slide plate 14. It is fitted in the recesses 117-120.
And the four slide guide mechanisms SGi-SGl of the same structure are comprised from the movable board 13, each guide bar 109-112, and the sliding members 113-116. Further, the slide plate 14, the respective guide bars 109 to 112, and the sliding members 117 to 120 constitute four slide guide mechanisms SGm to SGp having the same configuration.

Therefore, when the movable platen 13 moves up and down, the inner wall surfaces of the recesses of the sliding members 113 to 116 slide in close contact with the outer peripheral surfaces of the guide bars 109 to 112.
Further, when the slide plate 14 moves up and down, the inner wall surfaces of the concave portions of the sliding members 117 to 120 slide in close contact with the outer peripheral surfaces of the guide bars 109 to 112.
As a result, by providing each slide guide mechanism SGi to SGl, it is possible to prevent the movable platen 13 from being inclined due to the eccentric load.
Moreover, it can prevent that the slide plate 14 inclines by eccentric load by providing each slide guide mechanism SGm-SGp.

[4-5]
In the fourth embodiment, the movable platen 13 can be reliably prevented from being tilted due to the eccentric load by the effect of [4-2] and the synergistic effect of the slide guide mechanisms SGi to SGl.
Moreover, in 4th Embodiment, it can prevent reliably that the slide plate 14 inclines by eccentric load by the synergistic effect of inclination correction | amendment mechanism RMc and each slide guide mechanism SGm-SGp.
Therefore, according to the fourth embodiment, the operation and effect of [1-5] of the first embodiment can be further enhanced.

[4-6]
In the fourth embodiment, the movable platen 13 is formed thick to provide the feed screw mechanisms SMg to SMj and the inclination correction mechanism RMc, thereby reducing the load on the slide guide mechanisms SGi to SGp. Therefore, each slide guide mechanism SGi-SGp can be reduced in size.

And since the structure of the inclination correction mechanism RMc is simple and inexpensive, even if the inclination correction mechanism RMc is provided, the manufacturing cost of the press device 80 hardly increases.
Further, since no special maintenance activity is required to maintain the operation of the inclination correction mechanism RMc, the maintenance cost of the press device 80 hardly increases even if the inclination correction mechanism RMc is provided.

Further, since the inclination correction mechanism RMc does not protrude outward from the movable platen 13 and the slide plate 14, even if the inclination correction mechanism RMc is provided, the outer dimensions of the press device 80 are not changed, and the installation cost of the press device 80 increases. do not do.
Therefore, according to the fourth embodiment, it is possible to provide the press device 80 capable of accurately correcting the inclination of the movable platen 13 or the slide plate 14 due to the eccentric load and performing high-precision press processing at low cost.

(Fifth embodiment)
FIG. 24 is a front view of the multistage (two-stage) press device 130 of the fifth embodiment, and shows a state where the movable platen 13 and the slide plate 14 are pulled up.
FIG. 25 is a left side view of the press device 130 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
FIG. 26 is a longitudinal sectional view of the feed screw mechanism SMc, SMd, SMk, SMl of the fifth embodiment.
FIG. 27 is a top view of the slide plate 14 of the fifth embodiment.
FIG. 28 is an explanatory diagram for explaining the operation of the inclination correction mechanisms RMd to RMg.
29 is a longitudinal sectional view of the entire press device 130 corresponding to FIG. 24, and is a sectional view taken along line XX shown in FIG.
30 is a longitudinal sectional view of the entire press apparatus 130 corresponding to FIG. 25, and is a sectional view taken along line YY shown in FIG.
The press device 130 of the fifth embodiment differs from the press device 80 of the fourth embodiment only in the following points.

(5-1)
The press device 130 of the fifth embodiment includes an upper fixed platen 11, a lower fixed platen 12, a movable platen 13, a slide plate 14, screw shafts 19 and 20, an upper die 23a, a lower die 23b, an upper die 24a, a lower die 24b, Nuts 28, 30, sprockets 32, 34, mounting members 35, 36, cross roller guide 37, feed screw mechanisms SMc, SMd, screw shafts 81, 82, bearing members 83-90, gears 91-99, servo motor 100, nuts 101-106, sprockets 107, 108, guide bars 109-112, sliding members 113-120, feed screw mechanisms SMg-SMl, slide guide mechanisms SGi-SGp, sprockets 131-134, chains 135-138, toothed idler 139 To 142, tilt correction mechanisms RMd to RMg, etc.
That is, in the press device 130 of the fifth embodiment, the chain 43 and the inclination correction mechanism RMc are omitted from the press device 80 of the fourth embodiment. Instead, the sprockets 131 to 134, the chains 135 to 138, and the toothed idler. 139 to 142 and inclination correction mechanisms RMd to RMg are added.

(5-2)
Each sprocket 131-134 is the same structure as each sprocket 32,34,107,108.
The sprockets 32, 34, 107, 108, 131 to 134 are fixedly attached to the nuts 28, 30, 105, 106 in two upper and lower stages. That is, the sprocket 131 is attached and fixed above the sprocket 32 in the nut 28, the sprocket 132 is attached and fixed above the sprocket 34 in the nut 30, and the sprocket 133 is attached and fixed above the sprocket 107 in the nut 105, A sprocket 134 is attached and fixed above the sprocket 108 in the nut 106.

On the upper surface side of the slide plate 14, toothed idlers 139 and 141 are attached to the right side of the screw shafts 19 and 81, and toothed idlers 140 and 142 are attached to the left side of the screw shafts 20 and 82.
The toothed idlers 139 to 142 are rotatable with respect to the slide plate 14 in a horizontal plane.

(5-3)
In the slide plate 14, a chain 135 is wound around the sprockets 32 and 34 attached to the nuts 28 and 30 and the toothed idlers 139 and 140 without slack.
The feed screw mechanisms SMc, SMd, sprockets 32, 34, toothed idlers 139, 140, and chain 135 constitute a tilt correction mechanism RMd for the slide plate 14.

In the slide plate 14, a chain 136 is wound around the sprockets 107 and 108 fixed to the nuts 105 and 106 and the toothed idlers 141 and 142 without slack.
The feed screw mechanisms SMk and SMl, the sprockets 107 and 108, the toothed idlers 141 and 142, and the chain 136 constitute a tilt correction mechanism RMe for the slide plate 14.

In the slide plate 14, a chain 137 is wound around the sprockets 131 and 133 fixed to the nuts 28 and 105 without slack.
The feed plate mechanisms SMc and SMk, sprockets 131 and 133, and the chain 137 constitute a tilt correction mechanism RMf for the slide plate 14.
In the slide plate 14, a chain 138 is wound around each sprocket 132, 134 fixedly attached to each nut 30, 106 without slack.
An inclination correction mechanism RMg of the slide plate 14 is constituted by the feed screw mechanisms SMd and SMl, the sprockets 132 and 134, and the chain 138.

[Operation and Effect of Fifth Embodiment]
According to the fifth embodiment, in addition to the operations and effects of [4-1] [4-2] [4-4] of the fourth embodiment, the following operations and effects can be obtained.

[5-1]
A nut 28 is screwed to the screw shaft 19, and a nut 30 is screwed to the screw shaft 20.
Further, the nuts 28 and 30 are connected to the slide plate 14 so as to be rotatable in a horizontal plane by the mounting members 35 and 36 and the cross roller guide 37.
The slide plate 14, the screw shaft 19, the nut 28, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMc. The slide plate 14, the screw shaft 20, the nut 30, the attachment members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMd.

Therefore, when the slide plate 14 moves up and down, the nuts 28 and 30 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, if an eccentric load is applied to the slide plate 14, the left and right ends, which are the longitudinal direction of the slide plate 14, are likely to be inclined.
And if inclination arises in the right-and-left both ends of the front side of the slide plate 14, a difference will arise in the rotation amount (rotation angle) of each nut 28,30.

For example, in a state where the left front end side of the slide plate 14 (where the nut 28 is connected) is lifted compared to the right front end side (where the nut 30 is connected), the rotation amount of the nut 28 becomes the rotation amount of the nut 30. Smaller than that.
On the contrary, when the right front end side of the slide plate 14 (where the nut 30 is connected) is lifted compared to the left front end side (where the nut 28 is connected), the amount of rotation of the nut 30 is the amount of rotation of the nut 28. Smaller than

Here, a sprocket 32 is attached and fixed to the nut 28, and a sprocket 34 is attached and fixed to the nut 30.
A chain 135 is wound around each sprocket 32, 34 and each toothed idler 139, 140 without slack.
The feed screw mechanisms SMc and SMd, sprockets 32 and 34, toothed idlers 139 and 140, and the chain 135 constitute an inclination correction mechanism RMd for the slide plate 14.

Therefore, when a difference occurs in the rotation amount of each nut 28, 30, tension is generated in the chain 135, and each nut 28, 30 has the same rotation amount by the tension corresponding to the difference in the rotation amount. The rotation of 28 and 30 is restricted.
As a result, the rotation amounts of the nuts 28 and 30 become the same, and the inclinations of the left and right ends on the front side of the slide plate 14 that are the connection points of the nuts 28 and 30 are corrected.
Thus, by providing the inclination correction mechanism RMd, it is possible to prevent the front side of the slide plate 14 from being inclined to one of the left and right end portions due to the eccentric load.

[5-2]
A nut 105 is screwed to the screw shaft 81, and a nut 106 is screwed to the screw shaft 82.
Further, the nuts 105 and 106 are connected to the slide plate 14 so as to be rotatable in a horizontal plane by the mounting members 35 and 36 and the cross roller guide 37.
The slide plate 14, the screw shaft 81, the nut 105, the attachment members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMk. The slide plate 14, the screw shaft 82, the nut 106, the mounting members 35 and 36, and the cross roller guide 37 constitute a feed screw mechanism SMl.

Therefore, when the slide plate 14 moves up and down, the nuts 105 and 106 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, if an eccentric load is applied to the slide plate 14, the left and right ends, which are the longitudinal direction of the slide plate 14, are likely to be inclined.
When tilts occur at the left and right end portions on the rear side of the slide plate 14, a difference occurs in the amount of rotation (rotation angle) of the nuts 105 and 106.

For example, in a state where the left rear end side (the connection place of the nut 105) of the slide plate 14 is lifted compared to the right rear end part (the connection place of the nut 106), the rotation amount of the nut 105 is the rotation of the nut 106. Smaller than the amount of movement.
Conversely, in a state where the right rear end side (the place where the nut 106 is connected) of the slide plate 14 is lifted compared to the left rear end side (the place where the nut 105 is connected), the amount of rotation of the nut 106 is that of the nut 105. Smaller than the amount of rotation.

Here, a sprocket 107 is attached and fixed to the nut 105, and a sprocket 108 is attached and fixed to the nut 106.
A chain 136 is wound around each sprocket 107, 108 and each toothed idler 141, 142 without slack.
The feed screw mechanisms SMk and SMl, the sprockets 107 and 108, the toothed idlers 141 and 142, and the chain 136 constitute a tilt correction mechanism RMe for the slide plate 14.

Therefore, when a difference occurs in the rotation amount of each nut 105, 106, tension is generated in the chain 136, and each nut 105, 106 has the same rotation amount by the tension corresponding to the difference in rotation amount. The rotation of 105 and 106 is restricted.
As a result, the rotation amounts of the nuts 105 and 106 become the same, and the inclinations of the left and right end portions on the rear side of the slide plate 14 where the nuts 105 and 106 are connected are corrected.
Thus, by providing the inclination correction mechanism RMe, it is possible to prevent the rear side of the slide plate 14 from being inclined to one of the left and right end portions due to the eccentric load.

[5-3]
When the slide plate 14 moves up and down, the nuts 28 and 105 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, when an eccentric load is applied to the slide plate 14 and the left side of the slide plate 14 is tilted toward one of the front and rear end portions, a difference occurs in the amount of rotation (rotation angle) of the nuts 28 and 105. Become.

For example, when the left front end side of the slide plate 14 (where the nut 28 is connected) is lifted compared to the left rear end side (where the nut 105 is connected), the amount of rotation of the nut 28 is the amount of rotation of the nut 105. Smaller than
On the contrary, when the left rear end side of the slide plate 14 (the place where the nut 105 is connected) is lifted compared to the left front end side (the place where the nut 28 is connected), the amount of rotation of the nut 105 is the rotation of the nut 28. Smaller than the amount of movement.

Here, a sprocket 131 is attached and fixed to the nut 28, and a sprocket 133 is attached and fixed to the nut 105.
A chain 137 is wound around each sprocket 131, 133 without slack.
The feed plate mechanisms SMc and SMk, sprockets 131 and 133, and the chain 137 constitute a tilt correction mechanism RMf for the slide plate 14.

Therefore, when a difference occurs in the rotation amount of each nut 28, 105, tension is generated in the chain 137, and each nut 28, 105 is made to have the same rotation amount by the tension corresponding to the difference in rotation amount. The rotation of 28 and 105 is restricted.
As a result, the rotation amounts of the nuts 28 and 105 become the same, and the inclination of the front and rear end portions on the left side of the slide plate 14 where the nuts 28 and 105 are connected is corrected.
Thus, by providing the inclination correction mechanism RMf, it is possible to prevent the left side of the slide plate 14 from being inclined toward one of the front and rear end portions due to the eccentric load.

[5-4]
When the slide plate 14 moves up and down, the nuts 30 and 106 rotate in the same direction by the same rotation amount as the slide plate 14 moves up and down.
At this time, when an eccentric load is applied to the slide plate 14 and the right side of the slide plate 14 is tilted toward one of the front and rear end portions, a difference occurs in the amount of rotation (rotation angle) of the nuts 30 and 106. Become.

For example, when the right front end side of the slide plate 14 (where the nut 30 is connected) is lifted compared to the right rear end side (where the nut 106 is connected), the amount of rotation of the nut 30 is the amount of rotation of the nut 106. Smaller than
On the contrary, in the state where the right rear end side (the place where the nut 106 is connected) of the slide plate 14 is lifted compared to the right front end side (the place where the nut 30 is connected), the amount of rotation of the nut 106 is the rotation of the nut 30. Smaller than the amount of movement.

Here, a sprocket 132 is attached and fixed to the nut 30, and a sprocket 134 is attached and fixed to the nut 106.
A chain 138 is wound around each sprocket 132, 134 without slack.
An inclination correction mechanism RMg of the slide plate 14 is constituted by the feed screw mechanisms SMd and SMl, the sprockets 132 and 134, and the chain 138.

Therefore, if a difference occurs in the amount of rotation of the nuts 30 and 106, a tension is generated in the chain 138, and the nuts 30 and 106 have the same amount of rotation due to the tension corresponding to the difference in the amount of rotation. 30 and 106 are restricted from rotating.
As a result, the rotation amounts of the nuts 30 and 106 become the same, and the inclination of the front and rear end portions on the right side of the slide plate 14 where the nuts 30 and 106 are connected is corrected.
Thus, by providing the tilt correction mechanism RMg, it is possible to prevent the right side of the slide plate 14 from being tilted to one of the front and rear end portions due to the eccentric load.

[5-5]
In the two-stage press device 130, the slide plate 14 is not driven directly by the servo motor 100, but is moved by the movement of the movable plate 13. However, it is easy to generate the inclination by the eccentric load.
However, by providing two sets of tilt correction mechanisms RMd and RMe having the same configuration, it is possible to prevent the slide plate 14 from tilting to either side of the left and right end portions in the longitudinal direction due to an eccentric load. Further, by providing two sets of tilt correction mechanisms RMf and RMg having the same configuration, it is possible to prevent the slide plate 14 from tilting to either side of the front and rear end portions in the short direction due to the eccentric load.

That is, in the fifth embodiment, four sets of tilt correction mechanisms RMd to RMg having the same configuration as the tilt correction mechanism RMb of the first embodiment are provided, and one set is arranged on each of the front, rear, left and right sides of the slide plate 14. It will be.
As a result, according to the fifth embodiment, the horizontal state of the slide plate 14 can be maintained by providing the inclination correction mechanisms RMd to RMg.

By the way, in each inclination correction mechanism RMd, RMe, the length (mounting allowance) of the part where each chain 135, 136 hangs on each sprocket 32, 34, 107, 108 is about 2 / of the outer circumference of the sprocket. The length is 3.
Further, in each of the inclination correction mechanisms RMf and RMg, the length of each of the chains 137 and 138 that span the sprockets 131 to 134 (mounting allowance) is ½ of the outer circumference of the sprocket. is there.
On the other hand, in the inclination correction mechanism RMc of the fourth embodiment, the length of the portion where the chain 43 hangs on each of the sprockets 32, 34, 107, 108 (the installation allowance) is 1 / of the outer periphery of the sprocket. 4 lengths.

Here, if the chain and sprocket have a small allowance, when tension is generated in the chain, the sprocket and chain are disengaged and the sprocket is likely to jump, and the chain tension does not propagate to the sprocket. There is a fear.
When the chain and sprocket have a large allowance, when the chain is tensioned, the sprocket and chain will not be engaged and the sprocket will be less likely to skip teeth. Propagate.

Therefore, in each of the inclination correction mechanisms RMd to RMg of the fifth embodiment, the span between the chain and the sprocket is larger as described above than the inclination correction mechanism RMc of the fourth embodiment. It becomes difficult and the chain tension is accurately propagated to the sprocket, so that the rotation of the nut is definitely regulated.
Therefore, according to the fifth embodiment, the inclination of the slide plate 14 can be corrected more reliably than in the fourth embodiment.

[5-6]
In the fifth embodiment, it is possible to reliably prevent the movable platen 13 from being inclined due to the eccentric load by the synergistic effect of the slide guide mechanisms SGi to SGl of the fourth embodiment.
Moreover, in 5th Embodiment, it can prevent reliably that the slide plate 14 inclines by eccentric load by the synergistic effect of inclination correction | amendment mechanism RMd-RMg and each slide guide mechanism SGm-SGp.
Therefore, according to the fifth embodiment, it is possible to further enhance the operations and effects of [1-5] of the first embodiment.

[5-7]
In the fifth embodiment, the movable platen 13 is formed thick to provide the feed screw mechanisms SMg to SMj and the inclination correction mechanisms RMd to RMg to reduce the load on the slide guide mechanisms SGi to SGp. Since it becomes possible, each slide guide mechanism SGi-SGp can be reduced in size.

And since the structure of inclination correction mechanism RMd-RMg is simple and cheap, even if it provides inclination correction mechanism RMd-RMg, the manufacturing cost of the press apparatus 130 hardly increases.
Further, since no special maintenance activity is required to maintain the operations of the inclination correction mechanisms RMd to RMg, even if the inclination correction mechanisms RMd to RMg are provided, the maintenance cost of the press device 130 hardly increases.

Further, since the inclination correction mechanisms RMd to RMg do not protrude outward from the movable platen 13 and the slide plate 14, even if the inclination correction mechanisms RMd to RMg are provided, the outer dimensions of the press device 130 are not changed. Installation costs do not increase.
Therefore, according to the fifth embodiment, it is possible to provide the press device 130 capable of accurately correcting the inclination of the movable platen 13 or the slide plate 14 due to the eccentric load and performing high-precision press processing at low cost.

[5-8]
The toothed idlers 139 to 142 are provided on the slide plate 14 as shown in FIG. 27 because the chains 135 and 136 wound around the sprockets 32, 34, 107 and 108 are attached to the lower mold 23b. This is to prevent interference.

(Sixth embodiment)
FIG. 31 is a front view of the multi-stage (two-stage) press device 150 of the sixth embodiment, and shows a state where the movable platen 13 and the slide plate 14 are pulled up.
FIG. 32 is a left side view of the press device 150 showing a state where the movable platen 13 and the slide plate 14 are pulled up.
The press device 150 of the sixth embodiment differs from the press device 80 of the fourth embodiment only in the following points.

(6-1)
Similar to the first embodiment, a hydraulic cylinder 21 is placed and fixed on the central portion of the upper fixed platen 11, and a piston 22 that protrudes downward from the hydraulic cylinder 21 has a through hole 11 a formed in the upper fixed platen 11. The tip of the piston 22 is connected and fixed to the upper surface side of the movable platen 13.

(6-2)
Both end portions of each of the screw shafts 19, 20, 81, 82 are connected and fixed to the fixed plates 11, 12 so as not to rotate, like the screw shafts 19, 20 of the first embodiment.

(6-3)
The platen of the movable platen 13 is formed to have the same plate thickness as that of the slide plate 14 like the movable platen 13 of the first embodiment.

(6-4)
The movable platen 13 is provided with feed screw mechanisms SMc ′, SMd ′, SMk ′, SMl ′, and an inclination correction mechanism RMc ′.
The feed screw mechanisms SMc ′, SMd ′, SMk ′, SMl ′ and the inclination correction mechanism RMc ′ are the same as the feed screw mechanisms SMc, SMd, SMk, SMl and the inclination correction mechanism RMc in the slide plate 14 of the fourth embodiment. It is a configuration.

[Operation and Effect of Sixth Embodiment]
According to the sixth embodiment, the operations and effects of [1-1] of the first embodiment and [4-3] of the fourth embodiment are obtained.
In addition, in the sixth embodiment, since the tilt correction mechanism RMc ′ is provided in the movable platen 13, the same action and effect as the slide plate 14 provided with the tilt correction mechanism RMc can be obtained for the movable platen 13 as well. For this reason, the same operation and effect as the above [4-5] [4-6] of the fourth embodiment can be obtained.

(Seventh embodiment)
FIG. 33 is a front view of the multi-stage (two-stage) press device 160 of the seventh embodiment, and shows a state where the movable platen 13 and the slide plate 14 are pulled up.
FIG. 34 is a left side view of the press device 160 showing a state in which the movable platen 13 and the slide plate 14 are pulled up.
The press device 160 of the seventh embodiment differs from the press device 130 of the fifth embodiment only in the following points.

(7-1)
Similar to the first embodiment, a hydraulic cylinder 21 is placed and fixed on the central portion of the upper fixed platen 11, and a piston 22 protruding downward from the hydraulic cylinder 21 has a through hole 11 a formed in the upper fixed platen 11. The tip of the piston 22 is connected and fixed to the upper surface side of the movable platen 13.

(7-2)
Both end portions of each of the screw shafts 19, 20, 81, 82 are connected and fixed to the fixed plates 11, 12 so as not to rotate, like the screw shafts 19, 20 of the first embodiment.

(7-3)
The platen of the movable platen 13 is formed to have the same plate thickness as that of the slide plate 14 as with the movable platen 13 of the first embodiment.

(7-4)
The movable platen 13 is provided with feed screw mechanisms SMc ′, SMd ′, SMk ′, SMl ′ and inclination correction mechanisms RMd ′ to RMg ′.
The feed screw mechanisms SMc ′, SMd ′, SMk ′, SMl ′ and the tilt correction mechanisms RMd ′ to RMg ′ are the feed screw mechanisms SMc, SMd, SMk, SMl and the tilt correction mechanism in the slide plate 14 of the fifth embodiment. RMd to RMg have the same configuration.

[Operations and effects of the seventh embodiment]
According to the seventh embodiment, the operations and effects of [1-1] of the first embodiment and [5-2] to [5-5] of the fifth embodiment are obtained.
In addition, in the seventh embodiment, since the movable platen 13 is provided with the inclination correction mechanisms RMd ′ to RMg ′, the same action and effect as the slide plate 14 provided with the inclination correction mechanisms RMd to RMg are provided. 13 is obtained, the same actions and effects as in [5-6] to [5-8] of the fifth embodiment are obtained.

[Another embodiment]
By the way, the present invention is not limited to the above-described embodiments, and may be embodied as follows. Even in this case, operations and effects equivalent to or more than those of the above-described embodiments can be obtained.
[A] Each chain 42, 43, 135, 136 may be replaced with a toothed belt.

  [A] The feed screw mechanisms SMa to SMl may be formed as ball screws by incorporating balls into the thread grooves of the female threads in the nuts 27 to 30, 61, 62, and 101 to 106.

  [C] Each of the above embodiments is embodied in a two-stage press device in which one slide plate 14 is provided between the lower fixed platen 12 and the movable platen 13. You may embody in the press apparatus of the 3 steps | paragraph type or more which provides the 2 or more slide plate 14 between.

  [D] In each of the above embodiments, since the movable platen 13 and the slide plate 14 share a screw shaft, the number of screw shafts can be reduced and the manufacturing cost of the press device can be reduced. However, in each embodiment, you may make it provide a screw shaft separately in the movable board 13 and the slide plate 14, respectively.

For example, in the first embodiment, the movable platen 13 and the slide plate 14 share the two screw shafts 19 and 20.
However, in the first embodiment, in addition to the screw shafts 19 and 20 inserted through the movable platen 13, two new screw shafts are provided, and the two new screw shafts are inserted through the slide plate 14, The nuts 28 and 30 may be screwed onto the two new screw shafts to form the feed screw mechanisms SMc and SMd and the inclination correction mechanism RMb.

In the sixth embodiment or the seventh embodiment, the movable platen 13 and the slide plate 14 share the four screw shafts 19, 20, 81, and 82.
However, in the sixth or seventh embodiment, in addition to the screw shafts 19, 20, 81, 82 inserted through the movable platen 13, four new screw shafts are provided, and the new four screws The shaft is inserted into the slide plate 14, and the nuts 28, 30, 105, 106 are screwed into the four new screw shafts, and the feed screw mechanisms SMc, SMd, SMk, SMl and the inclination correction mechanisms RMc to RMg. May be configured.

  [E] Although the movable platen 13 and the slide plate 14 of the fourth and fifth embodiments are rectangular, they may be rectangular including squares.

[F] The two-stage press device 10 according to the first embodiment may be a single-stage press device that omits the slide plate 14 and the tilt correction mechanism RMb and includes only the movable platen 13 and the tilt correction mechanism RMa.
Alternatively, the slide plate 14 and the tilt correction mechanism RMc may be omitted from the two-stage press device 150 of the sixth embodiment, and a single-stage press device including only the movable platen 13 and the tilt correction mechanism RMc ′ may be used.
In addition, the slide plate 14 and the tilt correction mechanisms RMd to RMg are omitted from the two-stage press device 160 of the seventh embodiment, and as a one-stage press device including only the movable platen 13 and the tilt correction mechanisms RMd ′ to RMg ′. Also good.

[G] In the fifth embodiment, any one of two sets of tilt correction mechanisms RMd, RMe and RMf, RMg having the same configuration may be provided on the lower surface side of the slide plate 14.
For example, a set of inclination correction mechanisms RMd and RMe may be provided on the lower surface side of the slide plate 14, and a set of inclination correction mechanisms RMf and RMg may be provided on the upper surface side of the slide plate 14. In this way, there is no possibility that the workpiece will be caught on the chains 135 and 136 when the workpiece is placed on the lower die 23b or when the workpiece is taken out from the lower die 23b.

[H] Each of the above embodiments is applied to a press device of a type that presses the workpiece between the upper die and the lower die by pushing down the movable platen 13. A press device of a type that presses the workpiece between the upper die and the lower die by pulling up, or a press device of a type that presses the workpiece between the upper die and the lower die by pushing up the movable platen 13 You may apply to.
For example, in the case of a press device of a type that pulls up the movable platen 13, the movable platen 13 may be disposed between the lower fixed platen 12 and the slide plate 14 in the second, fourth, and fifth embodiments.
Further, in the case of a press device of a type that pushes up the movable platen 13, the above-described embodiments are inverted (the lower fixed platen 12, the slide plate 14, the movable platen 13, and the upper fixed platen 11 are arranged in this order from the top to the bottom In this case).

1 is a top view of a multi-stage (two-stage) press apparatus 10 according to a first embodiment that embodies the present invention. The front view of the press apparatus 10 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The left view of the press apparatus 10 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The longitudinal cross-sectional view of slide guide mechanism SGa-SGh of 1st Embodiment. The longitudinal cross-sectional view of the feed screw mechanism SMa-SMd of 1st Embodiment. The top view of the movable board 13 of 1st Embodiment. The top view of the slide plate 14 of 1st Embodiment. It is a longitudinal cross-sectional view of the press apparatus 10 whole corresponding to FIG. 2, and is the XX sectional view shown to FIG. 6 and FIG. FIG. 8 is a longitudinal sectional view of the entire press apparatus 10 corresponding to FIG. 3, and is a sectional view taken along line YY shown in FIGS. The front view of the press apparatus 10 which shows the state which pushed down the movable board 13 and the slide plate 14. FIG. The top view of the multistage type (two stage type) press apparatus 50 of 2nd Embodiment which actualized this invention. The front view of the press apparatus 50 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The left view of the press apparatus 50 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. FIG. 14 is a longitudinal sectional view of the entire pressing device 50 corresponding to FIG. 13, and is a sectional view taken along line YY shown in FIG. 11. It is a front view of the multistage type (two stage type) press apparatus 70 of 3rd Embodiment which actualized this invention, and the state which pulled up the movable board 13 and the slide plate 14 is shown. The left view of the press apparatus 70 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The top view of the multistage type (two stage type) press apparatus 80 of 4th Embodiment which actualized this invention. The front view of the press apparatus 80 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The left view of the press apparatus 80 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The top view of the movable board 13 of 4th Embodiment. The top view of the slide plate 14 of 4th Embodiment. It is a longitudinal cross-sectional view of the whole press apparatus 80 corresponding to FIG. 18, and is XX sectional drawing shown to FIG. 20 and FIG. FIG. 22 is a longitudinal sectional view of the entire press device 80 corresponding to FIG. 19, and is a sectional view taken along line YY shown in FIGS. 20 and 21. It is a front view of the multistage type (two stage type) press apparatus 130 of 5th Embodiment which actualized this invention, and the state which pulled up the movable board 13 and the slide plate 14 is shown. The left view of the press apparatus 130 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The longitudinal cross-sectional view of the feed screw mechanism SMc, SMd, SMk, SMl of 5th Embodiment. The top view of the slide plate 14 of 5th Embodiment. Explanatory drawing for demonstrating operation | movement of inclination correction | amendment mechanism RMd-RMg. It is a longitudinal cross-sectional view of the whole press apparatus 130 corresponding to FIG. 24, and is the XX sectional view taken on the line shown in FIG. It is a longitudinal cross-sectional view of the whole press apparatus 130 corresponding to FIG. 25, and is the YY sectional view taken on the line shown in FIG. It is a front view of the multistage type (two-stage type) press apparatus 150 of 6th Embodiment which actualized this invention, and shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The left view of the press apparatus 150 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG. It is a front view of the multistage type (two stage type) press apparatus 160 of 7th Embodiment which actualized this invention, and shows the state which pulled up the movable board 13 and the slide plate 14. FIG. The left view of the press apparatus 160 which shows the state which pulled up the movable board 13 and the slide plate 14. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,50,70,80,130,150,160 ... Pressing device 11 ... Upper fixed plate 12 ... Lower fixed plate 13 ... Moveable plate 14 ... Slide plate 15-18 ... Guide shaft 19, 20, 81, 82 ... Screw shaft 21 ... Hydraulic cylinder 22 ... Piston 23a, 24a ... Upper die 23b, 24b ... Lower die 25,113-120 ... Sliding member 27-30,105,106 ... Nut 31-34,107,108,131-134 ... Sprocket 38 to 41, 139 to 142 ... toothed idlers 42, 43, 135 to 138 ... chains 55 to 59, 91 to 99 ... gears 60, 100 ... electric motors 109 to 112 ... guide bars RMa to RMg, RMc 'to RMg' ... Inclination correction mechanism SMa to SMl, SMc ', SMd', SMk ', SMl' ... Feed screw mechanism

Claims (15)

A fixed plate,
A rectangular movable plate arranged parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
A movable plate tilt correction means for preventing the movable plate from tilting to either side of both ends in the longitudinal direction;
A pressing device that moves the movable platen to the fixed platen side by the driving means and sandwiches a workpiece between the movable platen and the fixed platen, and presses the workpiece;
The movable plate tilt correction means includes:
A first nut and a second nut which are arranged at both ends in the longitudinal direction of the movable platen and are connected to the movable plate so as to be rotatable in a horizontal plane;
A first screw shaft screwed into the first nut and inserted through the movable platen;
A second screw shaft threadedly engaged with the second nut and inserted through the movable platen;
A first sprocket fixedly attached to the first nut;
A second sprocket mounted and fixed to the second nut;
A press apparatus comprising: a chain wound without slack on the first sprocket and the second sprocket. A fixed plate,
A rectangular movable plate arranged parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
At least one rectangular slide plate disposed between the fixed plate and the movable plate,
A slide plate tilt correction means for preventing the slide plate from tilting to either side of both ends in the longitudinal direction;
The movable platen is moved to the fixed platen side by the driving means, the slide plate is driven by the movement of the movable platen and moved to the fixed platen side, and the movable platen, the slide plate and the fixed platen are moved. It is a multi-stage press device that presses a work piece between them,
The slide plate inclination correction means includes:
A third nut and a fourth nut disposed at both ends in the longitudinal direction of the slide plate and connected to the slide plate so as to be rotatable in a horizontal plane;
A third screw shaft screwed into the third nut and inserted through the slide plate;
A fourth screw shaft threadedly engaged with the fourth nut and inserted through the slide plate;
A third sprocket fixedly attached to the third nut;
A fourth sprocket fixedly attached to the fourth nut;
A press apparatus comprising: a chain wound without slack on the third sprocket and the fourth sprocket. The movable platen inclination correcting means according to claim 1;
A press apparatus comprising the slide plate inclination correcting means according to claim 2. In the press apparatus of Claim 3,
The press device, wherein the first screw shaft and the third screw shaft are shared, and the second screw shaft and the fourth screw shaft are shared. A fixed plate,
A rectangular movable plate disposed parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
Movable plate tilt correction means for preventing the movable plate from tilting,
A pressing device for moving the movable platen to the fixed platen side by the driving means and sandwiching a workpiece between the movable platen and the fixed platen,
The movable plate tilt correction means includes:
First to fourth nuts arranged near the four corners of the movable plate and connected to the movable plate so as to be rotatable in a horizontal plane;
A first screw shaft screwed into the first nut and inserted through the movable platen;
A second screw shaft threadedly engaged with the second nut and inserted through the movable platen;
A third screw shaft screwed into the third nut and inserted through the movable platen;
A fourth screw shaft threadedly engaged with the fourth nut and inserted through the movable platen;
A first sprocket fixedly attached to the first nut;
A second sprocket mounted and fixed to the second nut;
A third sprocket fixedly attached to the third nut;
A fourth sprocket fixedly attached to the fourth nut;
A press apparatus comprising: a chain wound around the first to fourth sprockets without slack. A fixed plate,
A rectangular movable plate disposed parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
At least one rectangular slide plate disposed between the fixed plate and the movable plate,
A slide plate tilt correcting means for preventing the slide plate from tilting;
The movable platen is moved to the fixed platen side by the driving means, the slide plate is driven by the movement of the movable platen and moved to the fixed platen side, and the movable platen, the slide plate and the fixed platen are moved. It is a multi-stage press device that presses a work piece between them,
The slide plate inclination correction means includes:
Fifth to eighth nuts arranged near the four corners of the slide plate and connected to the slide plate so as to be rotatable in a horizontal plane;
A fifth screw shaft screwed into the fifth nut and inserted through the slide plate;
A sixth screw shaft screwed into the sixth nut and inserted through the slide plate;
A seventh screw shaft threadedly engaged with the seventh nut and inserted through the slide plate;
An eighth screw shaft screwed into the eighth nut and inserted through the slide plate;
A fifth sprocket mounted and fixed to the fifth nut;
A sixth sprocket fixedly attached to the sixth nut;
A seventh sprocket fixedly attached to the seventh nut;
An eighth sprocket mounted and fixed to the eighth nut;
A press apparatus comprising: a chain wound without slack on the fifth to eighth sprockets. The movable platen inclination correcting means according to claim 5;
A press apparatus comprising the slide plate inclination correcting means according to claim 6. A fixed plate,
A rectangular movable plate disposed parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
Movable plate tilt correction means for preventing the movable plate from tilting,
A pressing device for moving the movable platen to the fixed platen side by the driving means and sandwiching a workpiece between the movable platen and the fixed platen,
The movable plate tilt correction means includes:
First to fourth nuts arranged near the four corners of the movable plate and connected to the movable plate so as to be rotatable in a horizontal plane;
A first screw shaft screwed into the first nut and inserted through the movable platen;
A second screw shaft threadedly engaged with the second nut and inserted through the movable platen;
A third screw shaft screwed into the third nut and inserted through the movable platen;
A fourth screw shaft threadedly engaged with the fourth nut and inserted through the movable platen;
A first sprocket and a fifth sprocket fixedly mounted in two upper and lower stages with respect to the first nut;
A second sprocket and a sixth sprocket fixedly mounted in two upper and lower stages with respect to the second nut;
A third sprocket and a seventh sprocket fixedly attached to the third nut in two upper and lower stages;
A fourth sprocket and an eighth sprocket fixedly mounted in two upper and lower stages with respect to the fourth nut;
A first chain wound without slack with respect to the first sprocket and the second sprocket;
A second chain wound without slack with respect to the third sprocket and the fourth sprocket;
A third chain wound without slack with respect to the fifth sprocket and the seventh sprocket;
A press device comprising: a fourth chain wound without slack on the sixth sprocket and the eighth sprocket. A fixed plate,
A rectangular movable plate disposed parallel to the fixed plate in the vertical direction;
Driving means for moving the movable plate up and down;
At least one rectangular slide plate disposed between the fixed plate and the movable plate,
A slide plate tilt correcting means for preventing the slide plate from tilting;
The movable platen is moved to the fixed platen side by the driving means, the slide plate is driven by the movement of the movable platen and moved to the fixed platen side, and the movable platen, the slide plate and the fixed platen are moved. It is a multi-stage press device that presses a work piece between them,
The slide plate inclination correction means includes:
Fifth to eighth nuts arranged near the four corners of the slide plate and connected to the slide plate so as to be rotatable in a horizontal plane;
A fifth screw shaft screwed into the fifth nut and inserted through the slide plate;
A sixth screw shaft screwed into the sixth nut and inserted through the slide plate;
A seventh screw shaft threadedly engaged with the seventh nut and inserted through the slide plate;
An eighth screw shaft screwed into the eighth nut and inserted through the slide plate;
A ninth sprocket and a thirteenth sprocket fixedly mounted in two upper and lower stages with respect to the fifth nut;
A tenth sprocket and a fourteenth sprocket fixedly mounted in two upper and lower stages with respect to the sixth nut;
An eleventh sprocket and a fifteenth sprocket fixedly attached to the seventh nut in two upper and lower stages;
A twelfth sprocket and a sixteenth sprocket fixedly attached to the eighth nut in two upper and lower stages;
A fifth chain wound without slack with respect to the ninth sprocket and the tenth sprocket;
A sixth chain wound without slack with respect to the eleventh sprocket and the twelfth sprocket;
A seventh chain wound loosely around the thirteenth sprocket and the fifteenth sprocket;
A press apparatus comprising: an eighth chain wound without slack on the fourteenth sprocket and the sixteenth sprocket. The movable platen inclination correcting means according to claim 8,
A press apparatus comprising the slide plate inclination correcting means according to claim 9. In the press apparatus of Claim 7 or Claim 10,
The first screw shaft and the fifth screw shaft are shared, the second screw shaft and the sixth screw shaft are shared, the third screw shaft and the seventh screw shaft are shared, and the fourth A press apparatus, wherein a screw shaft and the eighth screw shaft are shared. In the press apparatus of any one of Claims 1-11,
The end of the screw shaft is connected and fixed so as not to rotate with respect to the stationary platen,
The press device is characterized in that the drive means is composed of a cylinder and a piston, and a tip portion of the piston is connected and fixed to the movable platen. The press apparatus according to any one of claims 2, 6, and 9,
The end of the screw shaft is pivotally connected to the stationary platen,
A nut to be screwed onto the screw shaft is fixedly attached to the movable platen,
The press device characterized in that the driving means rotationally drives the screw shaft. In the press apparatus of any one of Claims 1-13,
A guide member connected and fixed to the fixed plate and extending in the vertical direction;
A sliding member attached and fixed to the movable plate or the slide plate,
When the movable platen or the slide plate moves up and down, the guide member and the sliding member slide in close contact with each other. In the press apparatus of any one of Claims 1-14,
A mold attached and fixed to the movable platen or the slide plate;
A toothed idler connected to the movable platen or the slide plate so as to be rotatable in a horizontal plane;
The press apparatus according to claim 1, wherein the toothed idler changes a path of the chain so as to prevent the chain from interfering with the mold.

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