JPH11221635A - Driving method of transfer feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer feeder having the advantages of both a cam driving system and a servo driving system. SOLUTION: In a transfer feeder 2 which operates plural feed carriers 6 in the two-dimensional direction by a lift driving means 3 and a feed driving means 10 and carries a work to respective work stations of a press main body by cross bars 7 horizontally bridged between respective feed carriers 6, the feed driving means 10 is composed of a cam driving means 12 consisting of a feed cam 12b which is rotated synchronizing with the operation of the press main body by a power taken out of the press main body and a servo driving means 13 wherein a servomotor is used as a feed motor 21. Moreover, the feed carriers 6 are driven with the cam driving means 12 or the servo driving means 13 by selecting the cam driving means 12 or the servo driving means 13 with a driving force switching means 18 which is provided between the cam driving means 12 and the servo driving means 13. Whereby, the cam driving system or the servo driving system is selected according to the working content or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer feeder driving method which can select and use a cam driving method and a servo driving method.

[0002]

2. Description of the Related Art Conventionally, a transfer press which has a plurality of processing stations in a press body and sequentially processes a work at each processing station is provided with a transfer feeder for transporting the work to each processing station.

The transfer feeder has a pair of transfer bars arranged side by side in the work transfer direction, and drives the transfer bars in a two-dimensional or three-dimensional direction by driving means to transfer the work. The driving system for driving the transfer bar includes a cam driving system and a servo driving system.

For example, in a transfer feeder described in Japanese Patent Publication No. 62-26848, a lever is swung by a cam rotated by power taken out from a press body, and a transfer bar linked to the lever is moved in a feed direction and lift. The cam drive system, which drives the press body and the transfer feeder in a three-dimensional direction, is used, which is mechanically synchronized with the press body. There is an advantage that there is no possibility that the movable portion of the transfer feeder interferes with the movable portion of the transfer feeder.

On the other hand, the transfer feeder described in JP-A-6-106271 or JP-A-7-47497 is a servo feeder in which a transfer bar is driven in a two-dimensional or three-dimensional direction by driving means using a servomotor as a driving source. In the transfer feeder adopting this servo drive system, the feed stroke, lift stroke, clamp stroke, etc. can be freely changed by controlling the servo motor.
There is an advantage that even if the size or shape of the work changes, it can be dealt with without requiring a setup change operation.

[0006]

However, in the case of a transfer feeder employing a cam drive system, a feed stroke, a lift stroke, a clamp stroke, and the like are determined by the profile of the cam. Replace or Tokiko Sho 62-
As disclosed in Japanese Patent No. 26848, a plurality of feed cams or the like must be provided in advance and these cams need to be switched. When replacing the cams, it takes a lot of time to replace the cams, thereby lowering productivity, In the case of providing a plurality of cams, there is a problem that the structure of the driving device is complicated and expensive.

On the other hand, Japanese Unexamined Patent Publication No.
JP-A-106271 and JP-A-7-47497 describe that when an abnormality occurs in the control means for controlling the transfer feeder and the transfer feeder runs away, the press body and the movable parts of the transfer feeder interfere with each other. As a result, there were problems such as breakage of movable parts.

The present invention has been made in order to improve such a conventional problem, and provides a transfer feeder which can select a cam drive system and a servo drive system in accordance with the work contents, or can use both of them. It is another object of the present invention to maximize the advantages of the cam drive system and the servo drive system.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of feed carriers are controlled by a lift driving means and a feed driving means.
In a transfer feeder that operates in the dimensional direction and conveys a work to each processing station of the press body by a crossbar laid between the respective feed carriers, the feed drive means is taken out of the press body by power taken out of the press body. A cam driving means comprising a feed cam rotated in synchronization with the operation, and a servo driving means using a servo motor as a feed motor, and a driving force switching means provided between these driving means and the servo driving means. By selecting the cam drive means or the servo drive means, the feed carrier is driven in the feed direction by the cam drive means or the servo drive means.

With the above configuration, the cam drive system and the servo drive system can be selected according to the type of work to be machined, etc. When the cam drive system is selected, the operation of the press body and the transfer feeder in the feed direction is performed by a machine. Therefore, the transfer feeder can be operated at high speed in accordance with the high-speed operation of the press body.

When the servo drive system is selected, the feed pitch can be set arbitrarily according to the type of work.

In order to achieve the above object, a second aspect of the present invention is to operate a plurality of feed carriers in a two-dimensional direction by means of a lift driving means and a feed driving means, and to use a crossbar which is bridged between the respective feed carriers. In a transfer feeder for transporting a work to each processing station of the press body, a cam drive means including a feed cam rotated in synchronization with the operation of the press body by a power taken out of the feed drive means from the press body, and a servo motor. Is composed of a servo drive unit used for a feed motor, and in the case of mass production, the feed carrier is driven by the cam drive unit and the lift drive unit to carry a work, and in the case of high-mix low-volume production, Feed carrier by the servo drive means and the lift drive means. It is obtained so as to drive the direction.

According to the above configuration, when the cam driving means is selected by the driving force switching means, the transfer feeder can be operated at high speed in mechanical synchronization with the operation of the press body, so that mass production of products can be efficiently performed.

In the case of high-mix low-volume production, by selecting the servo drive means, the feed speed and the feed motion can be set in accordance with the type of work and the like. it can.

According to a third aspect of the present invention, a plurality of feed carriers are operated in a two-dimensional direction by a lift driving means and a feed driving means, and a cross bar is provided between the respective feed carriers. In a transfer feeder for transporting a work to each processing station of the press body, a cam drive means including a feed cam rotated in synchronization with the operation of the press body by a power taken out of the feed drive means from the press body, and a servo motor. And servo drive means used for the feed motor, and in normal times, the servo drive means is selected by the drive force switching means provided between these drive means and the servo drive means, and the feed is performed by the servo drive means and the lift drive means. In addition to driving the carrier in the feed direction, It is switched to the cam drive means by power switching means, in which so as to drive the feed carrier feed direction by the cam driving means.

According to the above construction, when an abnormality occurs in the control means for controlling the servo drive means and the synchronization of the press body and the transfer feeder becomes impossible, the driving force switching means switches to the cam drive means, and The press body and the feed carrier are mechanically synchronized by driving the feed carrier by the driving means, so that the cam driving means moves the movable portion of the transfer feeder and the work holding means to the movable portion of the press body and the metal. The movable part and the work of the transfer feeder can be retracted to a safe position without interfering with the mold or the like.
Thereby, it is possible to eliminate the problem that the movable part and the mold of the press body, the movable part and the work of the transfer feeder interfere with each other, and are broken.

According to a fourth aspect of the present invention, a plurality of feed carriers are operated in a two-dimensional direction by a lift driving means and a feed driving means, and a cross bar is provided between the respective feed carriers. In a transfer feeder for transporting a work to each processing station of the press body, a cam drive means including a feed cam rotated in synchronization with the operation of the press body by a power taken out of the feed drive means from the press body, and a servo motor. And a cam drive means is selected by a driving force switching means provided between the drive means and the servo drive means, and the feed carrier is advanced and returned by the cam drive means. Drive in the direction and the servo motor was used for the lift motor The shift driving means is obtained so as to drive the feed carrier to lift direction.

According to the above configuration, the feed carrier can be driven in the advance and return directions in mechanical synchronization with the operation of the press body, and the lift pitch can be optionally set by driving the lift direction by the lift drive means. Can be changed to

According to a fifth aspect of the present invention, a plurality of feed carriers are operated in a two-dimensional direction by a lift driving means and a feed driving means, and a cross bar is provided between the respective feed carriers. In a transfer feeder for transporting a work to each processing station of the press body, a cam drive means including a feed cam rotated in synchronization with the operation of the press body by a power taken out of the feed drive means from the press body, and a servo motor. And a servo driving means used for the feed motor, and when the transfer feeder operates alone, the servo driving means is selected by the driving force switching means provided between the cam driving means and the servo driving means, and the servo driving means is selected. Drives the feed carrier in the feed direction, During synchronous operation of the main body and the transfer feeder, select a cam drive means by a driving force switching means, in which so as to drive the feed carrier to feed direction.

With the above configuration, the transfer feeder is independently operated by the servo drive means and the lift drive means, and
The trial operation for adjusting each movable part can be performed, and the work can be transported by mechanically synchronizing the press body and the transfer feeder during the production operation.

According to a sixth aspect of the present invention, a plurality of feed carriers are operated in a two-dimensional direction by a lift driving means and a feed driving means, and a cross bar is provided between the respective feed carriers. In a transfer feeder for transporting a work to each processing station of the press body, a cam drive means including a feed cam rotated in synchronization with the operation of the press body by a power taken out of the feed drive means from the press body, and a servo motor. And a cam drive means or a servo drive means by a driving force switching means provided between the cam drive means and the servo drive means, according to a die used in the press body. By selecting the above, the feed carrier can be driven by cam drive means or servo. The motion means is obtained so as to drive the feed direction.

According to the above configuration, the cam driving method and the servo driving method can be selected according to the size and shape type of the die to be used, so that the degree of freedom of the die that can be used is increased and the design of the die is easy. Become.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the embodiment of the present invention is applied to a module transfer press will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a transfer feeder provided in a module transfer press, FIG. 2 is an enlarged perspective view of the vicinity of feed driving means of the transfer feeder, FIG. 3 is a view taken in the direction of arrow B in FIG. FIG. 4 is a sectional view taken along the line CC of FIG. 3.

[0024] In these figures 1 denotes a press body, a press unit 1 ₁ which is divided for each of a plurality of processing stations
~ ₁₅ . These press units ₁₁
To ₁₅ are divided for each of the press units ₁₁ to ₁₅ ,
A bed 1a connected and integrated in the work transfer direction A by a fixing means (not shown), a plurality of uprights 1b erected on the bed 1a,
b, the crown 1c laid horizontally on
Be divided into each press unit 1 ₁ to 1 every ₅ are integrally connected to the work conveying direction A by fixing means not shown. And between each press unit 1 ₁ to 1 ₅ bed 1a and the crown 1c is firmly connected by tie bolts (not shown) are inserted in the uprights 1b.

[0025] Within the crown 1c of the respective press units 1 ₁ to 1 _5, the slide drive means (not shown) have been accommodated respectively, these slide driving means, vertically movable under each crown 1c The slide (not shown) supported by the slider is driven up and down.
The slide be divided into each press unit 1 ₁ to 1 every _5, and respectively on type on the lower surface is attached, these lower mold and fixed lower mold through the bolster on each bed 1a (none (Not shown).

On the other hand, in the press body 1, a transfer feeder 2 is provided over each of the press units ₁₁ to ₁₅ . The transfer feeder 2 includes a pair of lift beams 2a arranged side by side in the workpiece transfer direction A.
These lift beams 2a can be moved up and down while maintaining a horizontal state by the lift driving means 3 mounted on each of the uprights 1b except for the upstream most upright 1b.

As shown in FIG. 2, the lift driving means 3 has support members 3a fixed to the upright 1b, and the upper end of the lift rod 3b is supported by these support members 3a so as to be slidable up and down. I have. The lift rods 3b are provided for each of the lift driving means 3, and the lower end is fixed to the upper surface of the lift beam 2a.
A rack 3c is formed on the upper end side of b, and a pinion 3d is meshed with these racks 3c.

A lift motor 4 composed of a servomotor is connected to these pinions 3d via power transmission means 5 such as a worm speed reducer. Lift motor 4
Is mounted on the support member 3a with the rotating shaft 4a facing downward, and by rotating the pinion 3d forward and reverse via the power transmission means 5, the lift beam 2a can be moved up and down via the lift rod 3b. Has become.

In FIGS. 1 and 2, reference numeral 3e denotes a lift beam 2.
The balance cylinder 3e is an air cylinder that urges a upward, and the load such as the lift beam 2a is supported by the balance cylinder 3e, so that the lift beam 2a can be lifted by a smaller lift motor 4. .

On the other hand, guide rails 2b are protrudingly provided on both lower sides of each of the lift beams 2a along the lower surface.
A plurality of feed carriers 6 are supported by the guide rails 2b via rollers 6a so as to be movable in the longitudinal direction of the lift beam 2a (work transfer direction A). The feed carrier 6 is provided two by two for each processing station, and a cross bar 7 is detachably mounted between the feed carriers 6 opposed to each other so as to be orthogonal to the workpiece transfer direction A. A plurality of work holding means 8 such as vacuum cups for holding the work are detachably attached to these crossbars 7.

The feed carriers 6 separated in the work transport direction A are connected to each other by a connecting rod 6b so as to have the same interval as the pitch of each processing station. The distal end of a feed lever 10 a of a feed drive unit 10 is connected via a link 9 to the feed carrier 6 located at the most upstream side while being movable in the transport direction A.

[0032] The feed drive means 10, have been placed on the upstream side of the press body 1 (or downstream), and a feed box 10b secured to the crown 1c side of the press unit 1 _1. The feed box 10b is provided for each lift beam 2a, and houses a cam drive unit 12 and a servo drive unit 13 therein.

[0033] The cam drive means 12 is for mechanically driving each lift beam 2a by cam slide drive in the crown 1c via a power take off unit 14 disposed in the crown 1c side of the press unit 1 ₁ Connected to the means. The power take-out means 14 includes a power take-off shaft 14a for taking out power from the slide drive means, a clutch shaft 14c connected to the power take-out shaft 14a via a bevel gear train 14b, and a power take-off shaft 14c connected to the clutch shaft 14c via a bevel gear 14d. An output shaft 14e is provided, and a clutch 15 for intermittently transmitting power is interposed at an intermediate portion of the clutch shaft 14c.

The output shaft 1 of the power take-out means 14
4e, the cam shaft 12a of the cam drive means 12 is connected via a gear train 16 and the cam shaft 12a is synchronized with the operation of the press body 1 by the power taken out from the slide drive means of the press body 1. It is designed to be rotated. The cam shaft 12a is supported so as to be parallel to a support shaft 11 that supports the base end of the feed bar 10a. A feed cam 12b composed of two positive cams is fixed to the cam shaft 12a. The tip of a pair of switching levers 18a and 18b constituting the driving force switching means 18 is in contact with the feed cam 12b via a cam follower 18c so as to be freely movable. On the side surface of the base end portion of the feed lever 10a, a shaft body 10c is protruded, and two annular grooves 10d are formed on the outer peripheral surface of the shaft body 10c. The base ends of the switching levers 18a and 18b are rotatably supported via groove bushes 10e.

The distal end of the piston rod 19a of the switching means 19 provided for each of the switching levers 18a, 18b is pivotally mounted between the base ends of the switching levers 18a, 18b. The switching means 19 is constituted by a hydraulic cylinder such as a hydraulic cylinder,
9b is pivotally attached to the side surface of the base end of the feed lever 10a, and the cam followers 18 supported on the distal ends of the switching levers 18a and 18b by these switching means 19.
c is in contact with the outer peripheral surface of the feed cam 12b,
Each of the switching levers 18a and 18b can be opened and closed at three positions: a position slightly separated from the outer peripheral surface of the feed cam 12b and a position opened more than the maximum diameter of the feed cam 12b.

On the other hand, the base end side of the feed lever 10a is connected to the servo driving means 1 via a segment gear 20.
3 is connected. The servo drive means 13 has a feed motor 21 composed of a servo motor installed on the cam box 10b.
A clutch means 24 is provided in the middle of one rotating shaft 21 a, and a pinion 22 attached to a tip of the rotating shaft 21 is meshed with the segment gear 20.

The segment gear 20 is formed in a substantially semicircular shape having a center at the center of rotation of the feed lever 10a. The segment gear 20 is positioned between the branch portions 10f provided at the base end of the feed lever 10a. It is fixed to the base end.

Next, a method of driving the transfer feeder 2 configured as described above will be described. When the feed direction is driven by the cam drive system and the lift direction is driven by the servo drive system, each of the switching levers 18a, 1 of the driving force switching means 18 is driven.
8b is closed by the switching means 19, and the cam followers 18c supported on the distal ends of the switching levers 18a and 18b are brought into contact with the outer peripheral surface of the feed cam 12b.
Further, in order to cut off the transmission of power between the servo drive means 13 and the feed lever 10a, the clutch means 24 separates the feed motor 21 and the feed lever 10a.

Next, when the operation of the press body 1 is started in this state, the cam drive means 12 operates in synchronization with the operation of the press body 1 by the power taken out from the press body 1 via the power take-out means 14. Then, the lift driving means 3 also starts operating in synchronization with the operation of the press body 1 by control means (not shown). Then, when a work is carried into the press body 1 from the upstream side of the press body 1, the work holding means 8 of the crossbar 7 provided on the very upstream side holds the work. Thereafter, when the lift driving means 3 raises the lift beam 2a to raise the work to the work transfer height (pass line), the feed cam 12b moves the leading end side of the feed lever 10a to the downstream side via the switching levers 18a, 18b. And swing.

As a result, the feed carriers 6 supported by the lift beams 2a are moved (advanced) to the downstream side via the links 9, and accordingly, the crossbar 7 bridged between the respective feed carriers 6 is also downstream. The work held by the work holding means 8 provided on the most upstream crossbar 7 is moved to the upper side of the first processing station, and the work holding means is moved to the work station below the first processing station. The work held by the work holding means 8 is carried into each processing station because the work held by the work holding means 8 lowers the lift beam 2a after the work held by the work 8 is conveyed to the next processing station. Is done.

After that, when the work holding means 8 releases the work, the lift driving means 3 raises the lift beam 2a, and then the feed cam 12b feeds the feed lever 1a.
Each feed carrier 6 is moved (returned) to the upstream side via Oa, and stopped at the standby position. In this state, the slide of each of the press units ₁₁ to ₁₅ is lowered by a slide drive mechanism provided in each crown 1c,
The work carried into each processing station is processed. When the forming of the work is completed and the ascent of the slide is started, each feed carrier 6 is again moved to the upstream side via the feed lever 10a by the feed cam 12b. The workpiece is returned to the first position, and the workpiece holding means 8 holds the workpiece to be processed next and the workpiece that has been formed at each processing station.

The above operation is repeated to convey a workpiece. The operation of the feed carrier 6 in the feed direction is mechanically synchronized with the operation of the press body 1 by the cam driving means 13. Even if the emergency stop is performed for some reason, the movable portion and the mold of the press body 1 and the crossbar 7 and the work holding means 8 of the transfer feeder 2 do not interfere with each other.

In the cam drive system, since the transfer body 2 is driven by mechanically synchronizing the press body 1 and the transfer feeder 2, the transfer feeder 2 can be operated at a high speed. This cam drive method is optimal for production.

On the other hand, when both the feed direction and the lift direction of the lift beam 2a are driven by the servo drive method,
Each switching lever 18a, 18b of the driving force switching means 18
Is slightly opened by the switching means 19 so that the cam followers 18c supported by the tips of the switching levers 18a and 18b are slightly separated from the outer peripheral surface of the feed cam 12b.
In order to drive 0a, the clutch means 24 connects the feed motor 21 and the feed lever 10a.

When a work is carried into the press body 1 from the upstream side of the press body 1 in this state, the work holding means 8 of the crossbar 7 provided on the most upstream side holds the work. Thereafter, when the lift driving means 3 raises the lift beam 2a to raise the work to the pass line, the feed motor 21 of the servo driving means 13 is rotated in synchronization with the operation of the press body 1, and the pinion 22 and the segment gear 20 are rotated. , The tip side of the feed lever 10a is swung to the downstream side.

As a result, the feed carriers 6 supported by the lift beams 2a are moved (advanced) to the downstream side via the links 9, and accordingly, the crossbar 7 bridged between the feed carriers 6 is also downstream. The work held by the work holding means 8 provided on the most upstream crossbar 7 is moved to the upper side of the first processing station, and the work holding means is moved to the work station below the first processing station. The work held by the work holding means 8 is carried into each processing station because the work held by the work holding means 8 lowers the lift beam 2a after the work held by the work 8 is conveyed to the next processing station. Is done.

Thereafter, when the work holding means 8 releases the work, the lift beam 2a is lifted by the lift driving means 3 and then the feed lever 1 is fed by the feed motor 21.
Each feed carrier 6 is moved (returned) to the upstream side via Oa, and stopped at the standby position. In this state, the slide of each of the press units ₁₁ to ₁₅ is lowered by a slide drive mechanism provided in each crown 1c,
The work carried into each processing station is processed. When the forming of the work is completed and the ascent of the slide is started, each feed carrier 6 is returned to the upstream side by the feed motor 21 again, and the first time. After reaching the position, the workpiece holding means 8 holds the workpiece to be processed next and the workpiece that has been formed at each processing station.

The above operation is repeated to convey the workpiece. During the operation, the feed cam 12b provided on the cam driving means 12 is also rotated in synchronization with the operation of the press body 1, but the switching means is provided. 19 by cam follower 18c
The ends of the switching levers 18a, 18b are open so that the feed cam 12b is slightly separated from the outer peripheral surface of the feed cam 12b.
The feed lever 10a is not mechanically driven by 2b.

The above is a case where the lift beam 2a is driven in the feed direction and the lift direction by the servo drive means 13 and the lift drive means 3, so that the work is conveyed to each processing station in synchronization with the operation of the press body 1. However, when the type of the work to be processed by the press body 1 changes, when changing the mold, the crossbar 7 is also carried out of the press body 1 together with the mold, and the mold and the mold suitable for the work to be processed next are removed. Since it is replaced with the work suction means 8, the feed stroke and the lift stroke need to be changed depending on the type of work.

However, when the servo drive system is selected as described above, the feed stroke and the lift stroke are simply input to the control means in advance, and the control means controls the servo so that the input feed stroke and the lift stroke are obtained. Since the driving means 13 and the lift driving means 3 are controlled, a changeover work such as changing a cam in accordance with a feed stroke or a lift stroke is not required unlike a cam driving method. In the case of high-mix low-volume production that needs to be performed, a servo drive system is particularly optimal.

On the other hand, when the servo drive system is selected in both the feed direction and the lift direction, the feed pitch and the lift pitch can be easily changed. On the other hand, if an abnormality occurs in the control means, the press body 1 and the transfer feeder 2 are synchronized. The movable part of the press body 1
There is a possibility that the movable part of the transfer feeder 2 may interfere. In order to prevent this, if an abnormality in the control means occurs while driving in the feed direction and lift direction by the servo drive method, the feed direction is instantaneously switched to the cam drive method, and the movable part etc. To prevent interference.

Next, the method will be described. During the servo drive in the feed direction, the switching levers 18a and 18b are opened at positions where the cam follower 18c is slightly separated from the outer peripheral surface of the feed cam 12b. If an abnormality is detected in the control means or the like in this state, the switching means 19 is extended by the abnormality signal, and the cam follower 18 is instantaneously extended.
c is brought into contact with the outer peripheral surface of the feed cam 12b, the clutch means 24 is released, and the transmission of power between the feed motor 21 and the feed lever 10a is cut off.

After this, the feed cam 12b
As a result, the feed carrier 6 is driven mechanically synchronously with the press body 1, so that even if the control means has an abnormality, the movable section of the press body 1 and the movable section of the transfer feeder 2 do not interfere with each other. Can be prevented beforehand.

The method of driving the transfer feeder 2 when working the work by operating the press body 1 has been described above. The method of driving the transfer feeder 2 includes exchanging the mold and the crossbar 7 of the transfer feeder 2. In some cases, the press body 1 is separated from the transfer feeder 2 to operate the press body 1 alone, or the transfer feeder 2 is operated alone.

Next, the method will be described.
Is operated, the clutch means 15 provided in the power take-out means 14 is released to disconnect the slide drive means of the press body 1 from the feed drive means 12. As a result, even when the press body 1 is operated, the cam shaft 12a of the feed drive unit 12 is not rotated, so that the press body 1 can be operated independently.

When the transfer feeder 2 is operated independently, the clutch means 15 is released from the state where the clutch means 15 is released.
Further, by the switching means 19, each switching lever 18a,
The switching levers 18a and 18b are opened so that the cam follower 18c provided at the distal end of the feed cam 12b is located at a position further opened than the maximum diameter of the feed cam 12b. In this state, the clutch means 24 is connected, the feed motor 21 swings the feed lever 10a in the feed direction via the pinion 22 and the segment gear 20 by the feed motor 21, and the lift means 2 raises and lowers the lift beam 2a. The single operation of the transfer feeder 2 becomes possible by the servo drive system.

The independent operation of the transfer feeder 2 is effective for a so-called trial operation for checking whether or not the replaced cross bar 7 or the work holding means 8 interferes with the slide of the press body 1 or the die.

In the above embodiment, the lift bar 2a
Are described in the vertical direction and the feed carrier 6 is driven in the feed direction to transfer the work. However, a pair of transfer bars (not shown) arranged in the work transfer direction A are moved in the feed direction. The present invention can also be applied to a transfer feeder that transports a workpiece by performing a three-dimensional operation in a lift direction and a clamp direction. In this case, a work holding means such as a finger is provided at a position facing the transfer bar, and the work is clamped by the work holding means and transported to each processing station.

Further, in the above-described embodiment, the positive cam is used as the feed cam 12b of the cam driving means 12, but an ordinary cam may be used. In this case, the feed cam 12b
When the feed carrier 6 is operated, the switching levers 18a and 18b may be urged by the reaction cylinder so that the cam follower 12c always contacts the cam surface so that the cam follower 12c does not separate from the cam surface.

Further, in the above embodiment, the press body 1
Has described the transfer feeder provided in the module transfer press divided for each processing station, but it can of course be applied to the transfer feeder provided in a general transfer press in which the press body 1 is integrated. It is.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a safety device of a transfer feeder according to an embodiment of the present invention.

FIG. 2 is an enlarged configuration diagram of a main part of a safety device of the transfer feeder according to the embodiment of the present invention.

FIG. 3 is a view as seen from a direction B in FIG. 2;

FIG. 4 is a sectional view taken along line CC of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Press body 2 ... Transfer feeder 3 ... Lift drive means 6 ... Feed carrier 7 ... Crossbar 10 ... Feed drive means 10a ... Feed lever 12 ... Cam drive means 12b ... Feed cam 13 ... Servo drive means 14 ... Power take-out means 18 ... Driving force switching means 18a, 18b ... Switching lever 18c ... Cam follower 19 ... Switching means A ... Work transfer direction

Claims (6)

[Claims] 1. A plurality of feed carriers (6) are separated by a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
3) and a driving force switching means (1) provided between the driving means (12) and the servo driving means (13).
By selecting the cam drive means (12) or the servo drive means (13) according to 8), it is possible to drive the feed carrier (6) in the feed direction by the cam drive means (12) or the servo drive means (13). Characteristic transfer feeder driving method. 2. A plurality of feed carriers (6) are separated by a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
In the case of mass production of 3), the feed carrier (6) is driven by the cam driving means (12) and the lift driving means (3) to convey a work, and at the same time, a multi-product small-quantity production is carried out. In the case, servo drive means (13)
And a driving method of the transfer feeder, wherein the feed carrier (6) is driven in the feed direction by the lift driving means (3). 3. A plurality of feed carriers (6) are separated by a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
3), and these driving means (12) in normal times.
The servo driving means (13) is selected by the driving force switching means (18) provided between the servo driving means (13) and the feed carrier (6) by the servo driving means (13) and the lift driving means (3). In addition to driving in the feed direction, when the control means is abnormal, the driving force switching means (18) switches to the cam drive means (12), and the cam drive means (12) drives the feed carrier (6) in the feed direction. Characteristic transfer feeder driving method. 4. A plurality of feed carriers (6) are separated by a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
3) and a driving force switching means (1) provided between the driving means (12) and the servo driving means (13).
8) The cam drive means (12) is selected, and the feed carrier (6) is driven in the advance (4) and return directions by the cam drive means (12), and the servo motor is used for the lift motor (4). Lift drive means (3)
A method for driving a transfer feeder, characterized in that the feed carrier (6) is driven in the lift direction by the following method. 5. A plurality of feed carriers (6) are connected to a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
3), and when the transfer feeder (2) is operated alone, the servo driving means (13) is provided by a driving force switching means (18) provided between the cam driving means (12) and the servo driving means (13). And the feed carrier (6) is driven in the feed direction by the servo drive means (13), and the cam is driven by the drive force switching means (18) during the synchronous operation of the press body (1) and the transfer feeder (2). A driving method of a transfer feeder, comprising selecting a driving means (12) and driving a feed carrier (6) in a feed direction by a cam driving means (12). 6. A plurality of feed carriers (6) are lifted by a lift drive means (3) and a feed drive means (10).
In the transfer feeder which is operated in the dimension direction and transports the work to each processing station of the press body (1) by a cross bar (7) bridged between the respective feed carriers (6), the feed driving means (10) The feed cam (12) rotated by the power taken out of the press body (1) in synchronization with the operation of the press body (1).
b) and a servo driving means (1) using a servo motor for a feed motor (21).
3), and driving the cam by the driving force switching means (18) provided between the cam driving means (12) and the servo driving means (13) according to the die used in the press body (1). Transfer feeder characterized in that the feed carrier (6) is driven in the feed direction by the cam drive means (12) or the servo drive means (13) by selecting the means (12) or the servo drive means (13). Drive method.