JP5375475B2 - Drive force assist mechanism for reciprocating transfer table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving force auxiliary mechanism of a reciprocating type carrying base capable of achieving reduction of a size of the drive device of the carrying base, avoiding increase of positioning errors and occurrence of vibration at the stroke end of the carrying base by backlash even when carrying out power transmission using gear mechanism such as rack-pinion, and preventing interference of the carrying base and a carried article with other devices by surely restoring the carrying base to an intermediate position without stopping it at the stroke end even when the drive device of the carrying base is faulty. <P>SOLUTION: The driving force auxiliary mechanism of the reciprocating type carrying base includes a restoring force generating means 4 for acting a resisting force as a restoring force coinciding with a decelerating direction to the carrying base 1 during deceleration time when the carrying base 1 goes for the stroke end from the intermediate position to be the base point between both the stroke ends and acting an assistance force as a restoring force coinciding with an accelerating direction during acceleration time when the carrying base 1 goes for the intermediate position from the stroke end. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a driving force assisting mechanism for a reciprocating transfer table.

  Generally, a reciprocating type is used as a transport table for transporting a workpiece such as a workpiece between press devices.

  FIG. 4 is an operation diagram showing the movement of the transfer table in the conventional example, and the transfer table 1 for transferring a workpiece (not shown) such as a work is slidably arranged along a linear guide not shown. Then, a rack 2 is attached to the lower surface of the carrier 1, a pinion 3 is engaged with the rack 2, and a motor or the like is connected to the pinion 3 via a speed reducer (not shown) to constitute a driving device. By rotating and driving the pinion 3 of the driving device in a required direction, the transfer table 1 is moved from one stroke end (see FIG. 4A) to the other position through an intermediate position (see FIG. 4B). After moving to the stroke end (see FIG. 4 (c)), the other stroke end (see FIG. 4 (c)) is passed through an intermediate position (see FIG. 4 (b)) and one stroke end (see FIG. 4 (c)). Go back to a) and repeat this operation. And it performs returns.

  The stroke of the reciprocating transport table 1 is S in the example shown in FIG.

  Although it is slightly different from the transport table 1 as described above, the general technical level of an apparatus for exchanging a die of a press machine by repeating a predetermined operation while reciprocating the transport cart is, for example, Patent Document 1 is available.

JP 2000-246373 A

  By the way, in the transport table 1 as described above, a large acceleration is required in accordance with a request for increasing the transport speed. For this reason, the driving device of the transport table 1 tends to increase in size. When the power is transmitted by engaging the pinion 3 with the rack 2 as in the example shown in FIG. 4, the positioning error at the stroke end of the carriage 1 becomes large due to backlash, and the occurrence of vibration is inevitable. Had the disadvantages.

  On the other hand, if the drive device of the transport table 1 breaks down, and the transport table 1 stops at the stroke end and remains in the die area of the press device, the transport table 1 and the transported object are removed from the press device. There was also a risk of interference with the slide.

  In view of such circumstances, the present invention can reduce the size of the driving device of the transport table, and even when power is transmitted using a gear mechanism such as a rack and pinion, the stroke end of the transport table due to backlash. In addition, it is possible to avoid an increase in positioning error and occurrence of vibrations in the transfer table, and even when the drive device of the transfer table fails, the transfer table is always returned to the intermediate position without stopping at the stroke end. It is an object of the present invention to provide a driving force assisting mechanism for a reciprocating transfer table that can prevent interference between the apparatus and other devices.

The present invention comprises a carrier that is reciprocally disposed between one stroke end and the other stroke end;
A driving device for reciprocating the transfer table;
A resistance force as a restoring force that coincides with the decelerating direction is applied to the conveyance table that reciprocates by the driving device when the conveyance table decelerates from the intermediate position that is the base point between the two stroke ends toward the stroke end. And a reciprocating force generating means for applying an assisting force as a restoring force that coincides with the acceleration direction when the conveying table is accelerated from the stroke end toward the intermediate position. This is related to the driving force assist mechanism.

  According to the above means, the following operation can be obtained.

  When configured as described above, the restoring force generating means matches the decelerating direction when decelerating from the intermediate position, which is the base point between both stroke ends, to the stroke end with respect to the carriage that is reciprocated by the driving device. In order to apply a resistance force as a restoring force to be applied, and to apply an auxiliary force as a restoring force that coincides with the acceleration direction when the conveying table is accelerated from the stroke end to the intermediate position, the conveying table driving device is A large acceleration can be obtained without increasing the size in response to a request for increasing the transport speed of the transport table.

  In addition, even if the driving device of the transport table is of a type in which power is transmitted by engaging a pinion with a rack, the restoring force is excluding the intermediate position where the restoring force by the restoring force generating means does not act. Since the tooth surfaces of the rack and the pinion contact each other without rattling, the backlash is eliminated, the positioning error at the stroke end of the transport table is reduced, and vibration is less likely to occur.

  On the other hand, even if the drive device of the transport table breaks down, the transport table automatically returns to the intermediate position without stopping at the stroke end due to the restoring force of the restoring force generating means. There is no worry that the table and the transported object are left in the other apparatus and interfere with each other.

In the driving force assist mechanism of the reciprocating transfer table, the restoring force generating means is
A guide block that is arranged to reciprocate in parallel with the transport table;
A timing belt connecting the guide block and the transport table;
The timing belt is wound around, the guide block is moved in the same direction as the movement direction of the conveyance table by the timing belt in conjunction with the movement of the conveyance table from the intermediate position toward one stroke end, and the conveyance table is in the middle. A pulley disposed at a position to move the guide block in the direction opposite to the moving direction of the transport table by the timing belt in conjunction with the operation from the position toward the other stroke end;
The neutral position is connected to the guide block so that the restoring force is not generated when the carriage is at an intermediate position, and the carriage is contracted to be compressed by the guide block when decelerating from the intermediate position to the stroke end. The carrier can be configured to include an elastic body that extends so as to push the guide block when accelerating from the stroke end toward the intermediate position.

  In this case, the elastic body can be an air cylinder, or the elastic body can be a compression spring.

In the driving force assist mechanism of the reciprocating transfer table, the restoring force generating means is
A guide block that is arranged to reciprocate in parallel with the transport table;
A timing belt connecting the guide block and the transport table;
The timing belt is wound around, the guide block is moved in the same direction as the movement direction of the conveyance table by the timing belt in conjunction with the movement of the conveyance table from the intermediate position toward one stroke end, and the conveyance table is in the middle. A pulley disposed at a position to move the guide block in the direction opposite to the moving direction of the transport table by the timing belt in conjunction with the operation from the position toward the other stroke end;
It is connected to the guide block, becomes a neutral position where the restoring force is not generated in a state where the transport table is at an intermediate position, and extends so that the transport table is pulled by the guide block when decelerating from the intermediate position toward the stroke end, An elastic body that contracts so as to pull the guide block during acceleration of the transport base from the stroke end toward the intermediate position can be used. In this case, the elastic body can be a tension spring.

  According to the driving force assist mechanism of the reciprocating transfer table of the present invention, the drive device of the transfer table can be reduced in size, and even when power is transmitted using a gear mechanism such as a rack and pinion, Increase in positioning error and vibration at the stroke end of the transfer table due to backlash can be avoided, and even if the drive device of the transfer table fails, the transfer table must be returned to the intermediate position without stopping at the stroke end. It is possible to achieve an excellent effect of preventing interference between the carriage and the carriage and other devices.

It is an operation | movement figure which shows the motion of 1st Example of this invention. It is an operation | movement figure which shows the motion of 2nd Example of this invention. It is an action | operation figure which shows the operation | movement of the 3rd Example of this invention. It is an operation | movement figure which shows the motion of the conveyance stand in a prior art example.

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

  FIG. 1 shows a first embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 4 denote the same components, and the basic configuration is the same as the conventional one shown in FIG. However, the feature of the first embodiment is that, as shown in FIG. 1, when the carriage 1 decelerates from the intermediate position, which is the base point between both stroke ends, to the stroke end, A restoring force that acts as a restoring force that coincides with the decelerating direction and that applies an auxiliary force as a restoring force that coincides with the accelerating direction when the carriage 1 is accelerated from the stroke end toward the intermediate position. The generation means 4 is provided.

  In the case of the first embodiment, the restoring force generating means 4 is provided with a guide block 5 which is reciprocally movable along a linear guide (not shown) in parallel with the transport table 1. A timing belt 6 connects the carrier 1 and a pulley 7 around which the timing belt 6 is wound is disposed, and a cylinder head side chamber 9 and a piston rod side chamber 10 partitioned by a piston 8 are provided in the guide block 5. The piston rod 12 of the air cylinder 11 as an elastic body using the trapped air is connected.

  Here, the position at which the pulley 7 is disposed is interlocked with the movement of the carriage 1 from the intermediate position (see FIG. 1B) toward one stroke end (see FIG. 1A). The timing block 6 moves the guide block 5 in the same direction as the movement direction of the carriage 1 and the timing is linked to the movement of the carriage 1 from the intermediate position toward the other stroke end (see FIG. 1C). The belt 6 is a position where the guide block 5 is moved in the direction opposite to the moving direction of the transport table 1.

  The air cylinder 11 connected to the guide block 5 is in a neutral position where the restoring force is not generated when the transport table 1 is at the intermediate position, and when the transport table 1 is decelerated from the intermediate position toward the stroke end. The guide block 5 contracts so as to be compressed, and the carriage 1 extends to push the guide block 5 during acceleration from the stroke end toward the intermediate position.

  Next, the operation of the first embodiment will be described.

  As in the prior art, by rotating and driving the pinion 3 of the driving device in a required direction, the transfer table 1 is moved from one stroke end (see FIG. 1A) to an intermediate position (see FIG. 1B). After moving to the other stroke end (see FIG. 1 (c)), one stroke end (see FIG. 1 (b)) passes through the intermediate position (see FIG. 1 (b)) from the other stroke end (see FIG. 1 (c)). Returning to FIG. 1 (a)), this operation is repeated. However, when the carriage 1 moves from the intermediate position as the base point between both stroke ends to the stroke end, deceleration is performed. When the stroke end is reached, the speed of the carriage 1 becomes zero, and when the carriage 1 moves from the stroke end to the intermediate position, acceleration is performed. Maximum speed It made.

  For example, when the transport table 1 moves from the intermediate position to the other stroke end, the guide block pulled by the timing belt 6 wound around the pulley 7 from the state where the air cylinder 11 is in the neutral position. 5, the air in the piston rod side chamber 10 expands and the pressure drops, attempts to pull back the piston 8, and the air in the cylinder head side chamber 9 is compressed to increase the pressure, In order to push the piston 8 back, a force (restoring force) for returning the air cylinder 11 to the neutral position acts on the piston 8 due to the pressure difference between the two chambers, and the piston 8 has a moving direction. The reverse restoring force works, and the restoring force is carried from the piston rod 12 via the guide block 5 and the timing belt 6. It is transmitted to the base 1. Further, for example, when the carrier 1 moves from one stroke end to an intermediate position, the guide that has been pulled by the timing belt 6 wound around the pulley 7 from the compressed state of the air cylinder 11. Since the compression force by the block 5 is released and extends, a force (restoring force) for returning the air cylinder 11 to the neutral position acts on the piston 8, and the piston 8 has the same direction as the moving direction. This restoring force is transmitted, and this restoring force is transmitted from the piston rod 12 to the transport table 1 through the guide block 5 and the timing belt 6.

  In this way, the restoring force generating means 4 constituted by the air cylinder 11 as the elastic body is located from an intermediate position at which the transport base 1 becomes a base point between both stroke ends with respect to the transport base 1 reciprocated by the driving device. When decelerating toward the stroke end, a resistance force is applied as a restoring force that coincides with the decelerating direction, and when the carriage 1 is accelerated from the stroke end toward the intermediate position, the restoring force coincides with the accelerating direction. Since the assisting force is applied, the driving device for the transport table 1 is not increased in size, and a large acceleration can be obtained in response to a request for increasing the transport speed of the transport table 1.

  Further, as in the first embodiment shown in FIG. 1, even if the driving device of the transport table 1 is of a type that transmits power by engaging the pinion 3 with the rack 2, Since the restoring force always acts and the tooth surfaces of the rack 2 and the pinion 3 contact each other without rattling, except for an intermediate position where the restoring force generated by the restoring force generating means 4 constituted by the air cylinder 11 does not act. This eliminates the positioning error at the stroke end of the carriage 1 and reduces vibration. Incidentally, when a double speed mechanism is used in the driving device of the transport table 1, the positioning error and vibration due to backlash are doubled and become large. Therefore, the driving device of the transport table 1 in which such a double speed mechanism is used. In this case, since the backlash is eliminated, the accuracy is greatly improved and is particularly effective.

  On the other hand, even if the driving device of the transport table 1 fails, the transport table 1 does not stop at the stroke end due to the restoring force of the restoring force generating means 4 constituted by the air cylinder 11 as the elastic body. Therefore, the carriage 1 and the conveyed product are always left in the die area of the pressing device and do not interfere with the slide.

  In this way, the driving device of the transport table 1 can be reduced in size, and even when power is transmitted using a gear mechanism such as the rack 2 and the pinion 3, the positioning error at the stroke end of the transport table 1 due to backlash is reduced. Increase and vibration can be avoided, and even when the driving device of the transport table 1 fails, the transport table 1 must be returned to the intermediate position without stopping at the stroke end. Interference with other devices can be prevented.

  FIG. 2 shows a second embodiment of the present invention. In the drawing, the same reference numerals as those in FIG. 1 denote the same components, and the basic configuration is the same as that of the first embodiment shown in FIG. However, the feature of the second embodiment is that, as shown in FIG. 2, when the carriage 1 decelerates from the intermediate position where the carriage 1 becomes a base point between both stroke ends toward the stroke end. A restoring force that acts as a restoring force that coincides with the decelerating direction and that assists as a restoring force that coincides with the accelerating direction when the carriage 1 is accelerated from the stroke end toward the intermediate position. The force generating means 4 is arranged in parallel with the transport table 1 so as to reciprocate along a linear guide (not shown), and a timing belt that connects the guide block 5 and the transport table 1 6 and the thymine A pulley 7 that the belt 6 is wound around, lies in the construction a compression spring 13 serving as a resilient member connected to the guide block 5.

  Here, the compression spring 13 connected to the guide block 5 is in a neutral position where the restoring force is not generated when the transport table 1 is in the intermediate position, and the transport table 1 is decelerated from the intermediate position toward the stroke end. It is sometimes shrunk so as to be compressed by the guide block 5 and extended so as to push the guide block 5 when the carriage 1 is accelerated from the stroke end to the intermediate position.

  In the case of the second embodiment, for example, when the transport table 1 moves from the intermediate position (see FIG. 2B) to the other stroke end (see FIG. 2C), the compression spring 13 is neutral. Since it is contracted so that it is compressed by the guide block 5 pulled by the timing belt 6 wound around the pulley 7 from the state in the position, the force to return the compression spring 13 to the neutral position is a restoring force. Is transmitted from the guide block 5 to the transport table 1 through the timing belt 6. Further, for example, when the transport table 1 moves from one stroke end (see FIG. 2A) to the intermediate position, the compression spring 13 is wound around the pulley 7 from the compressed state. Since the compression force by the guide block 5 pulled by the timing belt 6 is released and expands, the force to return the compression spring 13 to the neutral position serves as a restoring force from the guide block 5 via the timing belt 6. Is conveyed to the carrier 1.

  In this way, the restoring force generating means 4 constituted by the compression spring 13 as the elastic body is similar to the first embodiment in that the carriage 1 is moved in both strokes with respect to the carriage 1 reciprocated by the driving device. When decelerating from the intermediate position, which is the base point between the ends, toward the stroke end, a resistance force is applied as a restoring force that matches the decelerating direction, and when the carriage 1 is accelerated from the stroke end toward the intermediate position, the acceleration is performed. In order to apply an auxiliary force as a restoring force that coincides with the direction of movement, the driving device of the transport table 1 does not increase in size, and can respond to a request for increasing the transport speed of the transport table 1 and obtain a large acceleration. It becomes possible.

  Further, as in the second embodiment shown in FIG. 2, even if the driving device of the transport table 1 is of a type that transmits power by meshing the pinion 3 with the rack 2, Since the restoring force always acts and the tooth surfaces of the rack 2 and the pinion 3 come into contact with each other without rattling, except for an intermediate position where the restoring force by the restoring force generating means 4 constituted by the compression spring 13 does not act. This eliminates the positioning error at the stroke end of the carriage 1 and reduces vibration. Incidentally, when a double speed mechanism is used in the driving device of the transport table 1, the positioning error and vibration due to backlash are doubled and become large. Therefore, the driving device of the transport table 1 in which such a double speed mechanism is used. In this case, since the backlash is eliminated, the accuracy is greatly improved and is particularly effective.

  On the other hand, even if the drive device of the transport table 1 breaks down, the transport table 1 does not stop at the stroke end due to the restoring force of the restoring force generating means 4 constituted by the compression spring 13 as the elastic body. Therefore, the carriage 1 and the conveyed product are always left in the die area of the pressing device and do not interfere with the slide.

  Thus, also in the second embodiment, as in the case of the first embodiment, it is possible to reduce the size of the driving device of the transport table 1 and transmit power using a gear mechanism such as the rack 2 and the pinion 3. In this case, an increase in positioning error and vibration at the stroke end of the carriage 1 due to backlash can be avoided, and the carriage 1 can be stopped at the stroke end even when the drive device of the carriage 1 fails. Therefore, it is possible to prevent the interference between the transport table 1 and the transported object and other devices.

  FIG. 3 shows a third embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 and 2 denote the same components, and the basic configuration is the first embodiment shown in FIG. 2 and the second embodiment shown in FIG. 2, but the feature of the third embodiment is that, as shown in FIG. When decelerating from the intermediate position serving as the base point toward the stroke end, a resistance force as a restoring force that matches the decelerating direction is applied, and when the carriage 1 is accelerated from the stroke end toward the intermediate position, the acceleration direction is A guide block 5 in which a restoring force generating means 4 for applying an assisting force as a matching restoring force is reciprocally movable along a linear guide (not shown) in parallel with the transport table 1 and the guide Connect the block 5 and the carrier 1 And Lee timing belt 6, a pulley 7 that the timing belt 6 is wound around, lies in that consisted tension spring 14 serving as a resilient member connected to the guide block 5.

  Here, the tension spring 14 connected to the guide block 5 is in a neutral position where the restoring force is not generated when the transport table 1 is in the intermediate position, and the transport table 1 is decelerated from the intermediate position toward the stroke end. It is sometimes extended so as to be pulled by the guide block 5 and contracted so as to pull the guide block 5 when the transport table 1 is accelerated from the stroke end toward the intermediate position.

  In the case of the third embodiment, for example, when the transport table 1 moves from the intermediate position (see FIG. 3B) to the other stroke end (see FIG. 3C), the tension spring 14 is neutral. Since the tension spring 14 is stretched so as to be pulled by the guide block 5 pulled by the timing belt 6 wound around the pulley 7 from the state in the position, the force for returning the tension spring 14 to the neutral position is a restoring force. Then, it is transmitted from the guide block 5 to the transport table 1 through the timing belt 6. Further, for example, when the transport table 1 moves from one stroke end (see FIG. 3A) to the intermediate position, the tension spring 14 is stretched around the pulley 7 from the stretched state. Since the compression force by the guide block 5 that has been pulled by the timing belt 6 is released and contracts, the force to return the tension spring 14 to the neutral position serves as a restoring force from the guide block 5 via the timing belt 6. Is conveyed to the carrier 1.

  As described above, the restoring force generating means 4 constituted by the tension spring 14 as the elastic body is transported to the transport table 1 reciprocated by the driving device as in the first and second embodiments. When the base 1 decelerates from the intermediate position, which is the base point between both stroke ends, toward the stroke end, a resisting force is applied as a restoring force that matches the decelerating direction, and the transport base 1 moves from the stroke end to the intermediate position. Since an auxiliary force as a restoring force that coincides with the acceleration direction is applied at the time of acceleration toward the vehicle, the driving device of the conveyance table 1 does not increase in size, and responds to a demand for an increase in the conveyance speed of the conveyance table 1, It is possible to obtain acceleration.

  Further, as in the third embodiment shown in FIG. 3, even if the driving device of the transport table 1 is of a type that transmits power by engaging the pinion 3 with the rack 2, Since the restoring force always acts and the tooth surfaces of the rack 2 and the pinion 3 contact each other without rattling, except for the intermediate position where the restoring force generated by the restoring force generating means 4 constituted by the tension spring 14 does not act. This eliminates the positioning error at the stroke end of the carriage 1 and reduces vibration. Incidentally, when a double speed mechanism is used in the driving device of the transport table 1, the positioning error and vibration due to backlash are doubled and become large. Therefore, the driving device of the transport table 1 in which such a double speed mechanism is used. In this case, since the backlash is eliminated, the accuracy is greatly improved and is particularly effective.

  On the other hand, even if the driving device of the transport table 1 breaks down, the transport table 1 does not stop at the stroke end due to the restoring force of the restoring force generating means 4 constituted by the tension spring 14 as the elastic body. Therefore, the carriage 1 and the conveyed product are always left in the die area of the pressing device and do not interfere with the slide.

  Thus, in the third embodiment as well, as in the first and second embodiments, the drive device of the transport table 1 can be reduced in size, and a gear mechanism such as the rack 2 and the pinion 3 is used. Even in the case of power transmission, an increase in positioning error and occurrence of vibration at the stroke end of the transport table 1 due to backlash can be avoided, and further, the transport table 1 can be removed even when the drive device of the transport table 1 fails. Without stopping at the stroke end, it is always returned to the intermediate position, and interference between the transport table 1 and the transported object and other devices can be prevented.

  The driving force assisting mechanism for the reciprocating transfer table according to the present invention is not limited to the above-described embodiment, and is not limited to the transfer table for transferring a workpiece such as a workpiece between press devices. Needless to say, various modifications can be made without departing from the gist of the present invention, such as being applicable to any conveying table as long as it is a formula.

DESCRIPTION OF SYMBOLS 1 Transfer stand 2 Rack 3 Pinion 4 Restoring force generation means 5 Guide block 6 Timing belt 7 Pulley 11 Air cylinder (elastic body)
13 Compression spring (elastic body)
14 Tension spring (elastic body)
S stroke

Claims (6)

A carrier that is reciprocally movable between one stroke end and the other stroke end;
A driving device for reciprocating the transfer table;
A resistance force as a restoring force that coincides with the decelerating direction is applied to the conveyance table that reciprocates by the driving device when the conveyance table decelerates from the intermediate position that is the base point between the two stroke ends toward the stroke end. And a reciprocating force generating means for applying an assisting force as a restoring force that coincides with the acceleration direction when the conveying table is accelerated from the stroke end toward the intermediate position. Driving force assist mechanism. The restoring force generating means;
A guide block that is arranged to reciprocate in parallel with the transport table;
A timing belt connecting the guide block and the transport table;
The timing belt is wound around, the guide block is moved in the same direction as the movement direction of the conveyance table by the timing belt in conjunction with the movement of the conveyance table from the intermediate position toward one stroke end, and the conveyance table is in the middle. A pulley disposed at a position to move the guide block in the direction opposite to the moving direction of the transport table by the timing belt in conjunction with the operation from the position toward the other stroke end;
The neutral position is connected to the guide block so that the restoring force is not generated when the carriage is at an intermediate position, and the carriage is contracted to be compressed by the guide block when decelerating from the intermediate position to the stroke end. The driving force assisting mechanism for a reciprocating transfer table according to claim 1, further comprising an elastic body that extends so as to push the guide block when the transfer table is accelerated from the stroke end toward the intermediate position.   3. A driving force assist mechanism for a reciprocating transfer table according to claim 2, wherein the elastic body is an air cylinder.   3. A driving force assisting mechanism for a reciprocating transfer table according to claim 2, wherein the elastic body is a compression spring. The restoring force generating means;
A guide block that is arranged to reciprocate in parallel with the transport table;
A timing belt connecting the guide block and the transport table;
The timing belt is wound around, the guide block is moved in the same direction as the movement direction of the conveyance table by the timing belt in conjunction with the movement of the conveyance table from the intermediate position toward one stroke end, and the conveyance table is in the middle. A pulley disposed at a position to move the guide block in the direction opposite to the moving direction of the transport table by the timing belt in conjunction with the operation from the position toward the other stroke end;
It is connected to the guide block, becomes a neutral position where the restoring force is not generated in a state where the transport table is at an intermediate position, and extends so that the transport table is pulled by the guide block when decelerating from the intermediate position toward the stroke end, The driving force assisting mechanism for a reciprocating transfer table according to claim 1, further comprising an elastic body that contracts to pull the guide block when the transfer table is accelerated from the stroke end toward the intermediate position.   6. A driving force assisting mechanism for a reciprocating transfer table according to claim 5, wherein the elastic body is a tension spring.

Images