JPH05277593A - Carrying device for press work - Google Patents

Abstract

PURPOSE:To improve the working rate of each press machine by executing automatically a change of a work holding implement corresponding to switchig of the kind of a work by a mechanical operation, at the time of carrying the work from one of two sets of press machines to the other. CONSTITUTION:A work holding implement controlling mechanism part 60 for supplying a work holding implement 31 connected to an arm mechanism 30 annexed to a movable mechanism 27 for moving between a first and a second press machines consists of plural work supporting implement supporting members 76 for supporting plural kinds of work holding implements 31 as a clamp state. Also, this mechanism part is formed by providing endless chains 71A, 71B for moving that which is selected from the work holding implement supporting members 76 to a position corresponding to an end part of the arm mechanism 30, and an ascending/descending cylinder 67 for releasing the work holding implement 31 in the moved work holding implement supporting member 76 from the clamp state, and thereafter, supplying it to the end part of the arm mechanism 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press work which is installed between a pair of press machines and which conveys a work to be pressed by both press machines from one press machine to the other press machine. Concerning a carrier device.

[0002]

2. Description of the Related Art In a press working line in which a plurality of types of press working such as hemming and trimming are sequentially applied to a work such as a panel member constituting a vehicle body, the work is usually required. A plurality of press machines for respectively performing a plurality of types of press work are arranged at a predetermined mutual distance, and the work is sequentially conveyed to each press machine. In such a case, the work is conveyed from one of the two presses which are adjacent to each other in the order of press working continuously to each other as shown in, for example, Japanese Utility Model Publication No. 60-32908. A work transfer device provided with a carriage on which a work is placed is installed between two adjacent press machines.

As described above, when the work is conveyed between the press machines by the work conveying device installed between the two press machines, for example, the work is taken out to one and the other of the two press machines, respectively. A mechanism (unloader) and a work loading mechanism (loader) are attached. Then, the work is taken out from the one press machine by the work take-out mechanism attached to the one press machine, and placed on the trolley that is supposed to stand by at a position near the one press machine on the work transfer device. Then, after the dolly on which the work is placed is brought into a traveling state to reach a position close to the other press on the work transfer device, the work is loaded by the work loading mechanism attached to the other press. Is loaded from the truck to the other press.

As described above, the work taking-out mechanism for taking out a work from one of the two presses which are continuously adjacent to each other in the order of press working and the work to the other of the two presses. Each of the work loading mechanisms to be loaded,
Generally, it is configured to have a work holder that holds each work and an arm member that supports the work holder. In such a work take-out mechanism or a work loading mechanism, the work holder provided therein is selected according to the work. Therefore, when there are many kinds of works sequentially conveyed to each of a plurality of press machines arranged at a predetermined mutual distance so that a plurality of kinds of press workings are performed, the kind of works The work holders in the work take-out mechanism and the work loading mechanism need to be frequently replaced every time when is switched.

[0005]

Conventionally, the replacement of the work holder in each of the work take-out mechanism and the work loading mechanism according to the switching of the work type has been performed manually by the worker. However, the replacement work is considered to be a troublesome work requiring a relatively long time. Therefore, there is a problem that the time required for the work of exchanging the work holders for the work take-out mechanism and the work loading mechanism is one of the factors that reduce the operation rate of each press machine.

In view of the above point, the present invention is arranged between two press machines, and when carrying the work held by the work holder from one of the two press machines to the other, The work holder is automatically changed by machine operation according to the change of the type of work, and the time required for the work holder replacement work is shortened, which improves the operating rate of each press machine. An object of the present invention is to provide a conveying device for a press work to be completed.

[0007]

In order to achieve the above-mentioned object, a press work transfer apparatus according to the present invention is arranged between a first press machine and a second press machine, and is a guide extending in a direction connecting both press machines. A member, a movable mechanism engaged with the guide member so as to be able to reciprocate along the member, an arm mechanism rotatably connected to the movable mechanism, and a first drive for moving the movable mechanism along the guide member. Means, second driving means for driving the arm mechanism in accordance with the movement of the movable mechanism, and the first and second press machines, and the first driving means is detachably connected to the end of the arm mechanism. And a work holder management unit that stores and supplies the work holder that holds the work to be pressed by the second press machine, and the work holder management unit is Each of multiple types of work holders Corresponding to the end part of the arm mechanism, the support member transfer means for moving a selected one of the plurality of work holder support members supported in the clamped state, the selected one of the work holder support members to the position corresponding to the end part of the arm mechanism. Clamp release means for releasing the work holder in the work holder supporting member moved to the position to be clamped from the clamp state, and the work holder supply for supplying the work holder released from the clamp state to the end of the arm mechanism. Formed by means.

[0008]

In the press work transfer apparatus according to the present invention having the above-described structure, the work holder detachably connected to the end of the arm mechanism is exchanged according to the change of the work type. At this time, first, the work holder connected to the end of the arm mechanism is disengaged from the end of the arm mechanism, and is gripped by the work holder supporting member not gripping the work holder in the work holder management unit. To be done. After that, in the work holder management unit, one corresponding to the work is selected from the plurality of work holders that are clamped and supported by the work holder supporting member, and the selected work holder is supported. The work holder support member is moved to a position corresponding to the end of the arm mechanism by the support member transfer means. Then, after the work holding tool in the work holding tool support member moved to the position corresponding to the end of the arm mechanism by the clamp releasing means is released from the clamped state,
The work holder released from the clamped state is supplied to the end portion of the arm mechanism by the work holder supply means and is detachably connected.

In this manner, the work holder, which is detachably connected to the end of the arm mechanism, is automatically replaced by the mechanical operation in accordance with the change of the kind of the work. The time required for replacement work is shortened, and the operating rate of each press machine is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 3 and 4 show an example of a press work transfer device according to the present invention together with two press machines.

In FIG. 3 and FIG. 4, the first press machine 1
Is a lower mold 6 attached to a fixed base 4 arranged on the base 3.
A and a work W arranged between the lower die 6A and the upper die 6B, which are provided with A and an upper die 6B which can be moved toward or away from the lower die 6A by an elevating mechanism 8 which is arranged above the lower die 6A.
It is said that the press processing is applied to the. In addition, the second press machine 10 installed with a predetermined mutual distance from the first press machine 1 similarly has a lower die attached to the fixed base 14 arranged on the base 13. 16A and lower mold 1
6A is provided with an upper die 16B which is moved closer to or away from the lower die 16A by an elevating mechanism 18 arranged above the lower die 16A, and is pressed by the first press machine 1 between the lower die 16A and the upper die 16B. The processed work W is arranged, and the work W is subjected to a press work different from the press work by the first press machine 1. An example of a press work transfer device according to the present invention is provided between the first press machine 1 and the second press machine 10, and the work W pressed by the first press machine 1 is used. A work transfer mechanism section 20 for transferring the sheet to the second press machine 10 and a work holder management mechanism section 60 are provided.

The work transfer mechanism section 20 is attached to both the first press machine 1 and the second press machine 10, and is supported by the support section 21 and the support section 21 provided with the motor 22. A guide member 24 provided with a motor 25 with a speed reducer, which is arranged between the machine 1 and the second press machine 10 and extends in a direction connecting the first press machine 1 and the second press machine 10, Guide member 24 by the operation of 25
The movable member 27 engaged in a state capable of reciprocating along it, and the guide member 2 with the movement of the movable member 27.
An arm mechanism 3 which can be bent and extended and is conveyed along
0, and a work holder 31 connected to the end of the arm mechanism 30 via a connecting portion 28, and further includes drive means for the movable mechanism 27, the arm mechanism 30, and the connecting portion 28, respectively. Has been done. Then, the work transfer mechanism section 20 is pressed by both the first press machine 1 and the second press machine 10 by the work holder 31 connected to the end of the arm mechanism 30 via the connection part 28. Holds the work W to be performed, which work W is, as shown by the solid and dashed lines in FIGS.
It is conveyed from the first press machine 1 to the second press machine 10.

The first press machine 1 to the second press machine 1 for the work W held by the work holder 31 as described above.
The first pressing machine 1 for the work W is used to convey the work W to 0.
The rack 26 attached to the guide member 24 is moved up and down by the operation of the motor 22, and the rack 26 attached to the guide member 24 is moved up and down by the operation of the motor 22. The guide member 24 is swung as shown by the chain line.

The support portion 21 includes a first press machine 1 and a second press machine 1.
Brackets 32 and 3 attached to upper side portions 1A and 10A of the press machine 10 facing each other, respectively.
3, both ends are supported by brackets 32 and 33,
The frame member 34 extending from the press machine 1 toward the second press machine 10 and the bracket 35 attached to the frame member 34 so as to project downward.

The guide member 24 extends along the frame member 34 of the supporting portion 21, and the lower portion of the bracket 35 of the supporting portion 21 penetrates the elongated hole 23 provided at the substantially central portion thereof. An engaging portion 24a for accommodating the tip of the bracket 35 extending through the elongated hole 23 is provided on the lower surface thereof. Engagement part 2
4a is rotatably attached to the tip of the bracket 35 in the support portion 21, so that the entire guide member 24 is swingably supported by the support portion 21.

First pressing machine 1 for guide member 24
A pulley 36 is provided at the end portion on the side, and a pulley 37 is provided at the end portion on the second press machine 10 side of the guide member 24. An endless belt 38 is mounted on the pulleys 36 and 37, and a part of the movable mechanism 27 is fixed to the endless belt 38. And the motor 2
By transmitting the rotation of 5 to the pulley 36 by the rotation transmission mechanism 39, the endless belt 38 is driven, whereby the movable mechanism 27 is moved along the guide member 24.

The arm mechanism 30 has a first arm 40A that supports the work holder 31 in a detachable state at one end via the connecting portion 28, and an arm connecting portion at the other end of the first arm 40A. Second arm 40B, one end of which is rotatably connected, and the second arm 40B
It is configured to include a rotation connecting portion that rotatably connects the other end of the to the movable mechanism 27. The rotation connecting portion that connects the other end of the second arm 40B to the movable mechanism 27 is the rotation shaft 41.
A fan-shaped gear 42 that is engaged with a gear that is attached to the gear and that rotates with the movement of the movable mechanism 27.
A drive unit for rotating the arm mechanism 30 with respect to the movable mechanism 27 in accordance with the movement of the movable mechanism 27 is formed.

Further, the other end of the second arm 40B is rotatably connected to the rotation connecting part for connecting the other end of the second arm 40B to the movable mechanism 27 and the other end of the first arm 40A. A rotation transmission mechanism 44 including a fan-shaped gear 43 attached to the rotary shaft 41 is interposed between the arm coupling portion and the rotation transmission mechanism 44. When rotated relative to each other, the rotation is transmitted to the arm connecting portion so that the arm connecting portion rotates the first arm 40A with respect to the second arm 40B.
That is, the bending and stretching operation of the arm mechanism 30 is performed. Therefore,
The rotation transmission mechanism 44 forms a driving unit that causes the arm mechanism 30 to perform a bending and stretching operation as the arm mechanism 30 rotates with respect to the movable mechanism 27.

The connecting portion 28 for detachably connecting the work holder 31 to one end of the first arm 40A is a bracket attached to one end of the first arm 40A, as shown in FIGS. 8 and 9. 45, two-part split type rotating shaft 46 supported by bracket 45, two-part split type rotating shaft 4
6, an actuator 47 arranged between 6 and 6, a support member 48 attached to a rotary shaft 46 of a two-division type to support the actuator 47, and a holding link mechanism for holding the work holder 31 according to the operation of the actuator 47. Four
9 is provided. The holding link mechanism 49 is rotatably attached to the support member 48 via a pin 52, and a pair of link members 51A and 51B rotatably connected to the tip of the rod 47a of the actuator 47 via a pin 50. At the same time, the hook members 54A and 54B are rotatably connected to the link members 51A and 51B via the pins 53, respectively.

A rotation transmission mechanism 55 is arranged between the arm connecting portion and the connecting portion 28 in the arm mechanism 30.
The rotation transmission mechanism 55 is composed of a plurality of bevel gears and the like, and transmits the rotation based on the rotation of the first arm 40A with respect to the second arm 40B to the connecting portion 28, and the connecting portion 2
The holding link mechanism 49 in 8 always maintains a predetermined downward posture, for example, regardless of the movement state of the arm mechanism 30. That is, the rotation transmission mechanism 5
Reference numeral 5 forms a drive mechanism that rotates with respect to the arm mechanism 30 so as to maintain the work holder 31 held by the holding link mechanism 49 in the connecting portion 28 in a predetermined posture as the arm mechanism 30 rotates. Is doing.

As the work holder 31, a plurality of kinds depending on the work are used, and one of them is
For example, as shown in FIG. 5, it has a base body 56 having a U-shaped cross section and extending, and at a central portion of the base body 56, a connecting portion 28 provided at an end portion of the arm mechanism 30.
56A and 56 engaging with the holding link mechanism 49 of
B is provided. Further, a pair of brackets 56C are provided at both ends of the base 56 so as to project in directions opposite to each other.
A suction cup 57 is attached downward to the tip of 6C. Further, the base 56 of the work holder 31 is provided with a pair of through holes 58a at a position sandwiching the engaging portions 56A and 56B, and the pair of through holes 5 is provided outside the pair of through holes 58a.
8b is provided, and further, a pair of through holes 59 is provided outside the pair of through holes 58b.

The work holders 31 have the same basic structure in all types, and are provided with a base 56, four brackets 56C and four suction cups 57 as shown in FIG. However, the projection length of each bracket 56C with respect to the base 56, the size or orientation of the suction cup 57 at the tip of each bracket 56C, and the like differ depending on the type.

The work holder 31 is connected to the arm mechanism 3.
Holding link mechanism 49 of the connecting portion 28 provided at the end of 0
When it is held in a detachable state by means of the hook members 54A and 54B in the holding link mechanism 49, the engaging portions 56A and 56 provided in the central portion of the work holder 31 by the operation of the actuator 47.
B is engaged with each other to maintain the engaged state.

As shown in FIG. 1, the work holder management mechanism section 60 includes a first press machine 1 and a second press machine 10.
Is formed below the floor 100 on which the
The opening 100a formed in
Is placed in the cavity 110 that is supposed to communicate above
A part thereof is projected to the upper side of the floor 100 through the opening 100a. As shown in FIGS. 1 and 2, the work holder management mechanism 60 is provided with an upper board member 61 disposed above the opening 100a in the floor 100, and provided upright on the upper board member 61. A pair of supports 63 for supporting the rotating shaft 62, a lower substrate member 64 arranged below the upper substrate member 61, and a pair of supports for supporting the rotating shaft 65 so as to hang from the lower substrate member 64. A platform 66, an elevating cylinder 67 standing upright at an intermediate position between the pair of support platforms 63 on the upper substrate member 61, and a motor 68 with a speed reducer installed on the upper substrate member 61 are provided.

Sprockets 69 are provided at both ends of the rotary shaft 62.
A and 69B are attached, and the rotary shaft 65
Sprockets 70A and 70B are also attached to both ends of the. An endless chain 71A is hooked on the sprockets 69A and 70A, and an endless chain 71B is hooked on the sprockets 69B and 70B. Further, the sprocket 73 attached to the rotating shaft 72 rotatably connected to the rotating shaft 62 and the sprocket 74 attached to the output shaft of the motor 68 installed on the upper substrate member 61 include an endless chain 75. Is hung.

As shown in FIGS. 6 and 7, a large number of work holder support members 76 are fixed to the endless chain 71A at predetermined intervals. An engaging end portion 76 </ b> A that engages with the base body 56 of the work holder 31 is formed on each work holder supporting member 76. Further, the work holder 3 is provided on one side surface of each work holder support member 76.
A positioning pin 77 having a tip portion to be inserted into the through hole 58b provided in the base 56 in FIG.
Further, on the other side surface of each work holder support member 76, an engagement member 78 that engages with a through hole 59 provided in the base 56 of the work holder 31 is urged by a spring 79 at its lower end. The shaft 80 is rotatably attached with the shaft 80 as a rotation supporting shaft, and the engaging member 78 and the spring 79 form a clamp mechanism 81.

A clamp releasing mechanism 82A is provided as a member related to the clamp mechanism 81 provided on each work holder supporting member 76, and each work holder supporting member 76 is at the highest position due to the movement of the endless chain 71A. When the (uppermost position) is taken, the clamp mechanism 81 provided on the work holder support member 76 is in a state of being controlled by the clamp release mechanism 82A. The clamp release mechanism 82A supports one of a pair of support members 83 provided upright on the upper substrate member 61, an L-shaped engagement member 84 rotatably attached to the upper end of the support member 83, and a support. It is formed by an air cylinder 85 attached near the upper end of the member 83, and the movable rod of the air cylinder 85 is connected to the lower end of the L-shaped engaging member 84. Then, as shown by the alternate long and short dash line in FIG. 7, when the movable rod of the air cylinder 85 is pushed upward, the L-shaped engaging member 84 is rotated so that the upper end portion thereof approaches the endless chain 71A. Further, as shown by the solid line in FIG. 7, when the movable rod of the air cylinder 85 is pulled downward, the L-shaped engaging member 84 has its upper end portion at the endless chain 7
It is rotated so as to be separated from 1A.

Similarly, as shown in FIG. 2, a large number of work holder support members 76 are fixed to the endless chain 71B at predetermined intervals, and as shown by the one-dot chain line in FIG. The work holder support member 76 is provided with an engaging end portion 76A and a positioning pin 77, an engaging member 78, and a clamp mechanism 81 formed by a spring. Further, in relation to the clamp mechanism 81 in the work holder supporting member 76 attached to the endless chain 71B, the clamp releasing mechanism 82 corresponding to the above-described clamp releasing mechanism 82A.
B is provided.

On the other hand, as shown in FIGS. 1, 8 and 9, a support plate member 88 having a pair of positioning pins 87 is attached to the upper end of the movable rod 86 of the lifting cylinder 67. The positioning pin 87 causes the movable rod 86 to be pushed upward, and the support plate member 88 to be raised, so that the base body 5 of the work holder 31.
6 is to be engaged with the through hole 58a.

With such a construction, the work holder management mechanism section 60 includes the work holder supporting members 76 fixed to the endless chain 71A and the work holder supporting members fixed to the corresponding endless chain 71B. A large number of workpiece holders 31 are supported by each of the sets of a large number of workpiece holder support members formed by the member 76. However,
At least one set out of the set of a large number of work holder support members is placed in a state where the work holder 31 is not supported (vacant state). In a state in which the work holder 31 is supported by the pair of corresponding work holder support members 76 that are fixed to the endless chains 71A and 71B, respectively, the base 5 of the work holder 31 is supported.
6 engages with the engaging end portions 76A of the pair of workpiece holder support members 76, respectively, and the pair of workpiece holder support members 76 into the pair of through holes 58b provided in the base 56 of the workpiece holder 31. The positioning pins 77 provided on each of the two engage with each other to position the workpiece holder 31 with respect to the pair of workpiece holder support members 76,
Further, a pair of work holder support members 76 are provided in the pair of through holes 59 provided in the base 56 of the work holder 31.
The hooks 78a provided on the upper ends of the engaging members 78 provided on the respective workpieces are engaged to clamp the workpiece holder 31 against the pair of workpiece holder support members 76, and the workpiece holder 31 is held. A pair of workpiece holder support members 7
The departure from 6 is prevented.

At the end of the arm mechanism 30, the connecting portion 2
When the work holder 31 detachably connected via 8 is exchanged, first, the movable mechanism 27 is moved along the guide member 24, and the arm mechanism 30 is moved.
Is driven and the work holder 3 held by the holding link mechanism 49 in the connecting portion 28 provided at the end thereof.
1 is moved to a position directly above the work holder management mechanism 60. At that time, the work holder management mechanism section 6
At 0, as shown in FIG. 2, a pair of work holder support members 76 corresponding to each other fixed to the endless chains 71A and 71B in the "empty state" respectively.
Is supposed to take the top position.

Next, the elevating cylinder 67 is activated and the movable rod 86 is pushed upward to support the support plate member 8.
8 is raised, and a pair of positioning pins 87 provided on the support plate member 88 are engaged with the through holes 58a provided in the base body 56 of the work holder 31 held by the holding link mechanism 49 for positioning. When the engagement of the pin 87 with the through hole 58a is completed, the lifting cylinder 67
Of the movable rod 86 is stopped. At the same time, the actuator 47 in the connecting portion 28 is operated to raise the holding link mechanism 49 upward, and the hook members 54A and 54B in the holding link mechanism 49 are engaged with the engaging portion 56A provided on the base 56 of the work holder 31. And 56B are released from the engaged state and the holding state of the work holder 31 by the holding link mechanism 49 is released.

Subsequently, the elevating cylinder 67 moves the movable rod 8
The support plate member 8 that supports the work holder 31 that is detached from the connecting portion 28 at the end of the arm mechanism 30.
8 is lowered and the supported work holders 31 are positioned in the "vacant state" with the work holders 31 positioned below. The pair of corresponding work holder support members fixed to the endless chains 71A and 71B, respectively. It is in a state of being supported by 76. Also in this case, the base body 56 of the work holder 31 supported by the support plate member 88 is engaged with the engaging end portion 7 of each of the pair of work holder support members 76.
6A, and positioning pins 7 provided in the pair of through holes 58b provided in the base 56 of the work holder 31 and provided in the pair of work holder support members 76, respectively.
7 are engaged with each other, and are further provided in a pair of through-holes 59 provided in the base 56 of the work holder 31 at upper ends of engagement members 78 provided in the pair of work holder support members 76, respectively. The hook portion 78a thus engaged is engaged.

The elevating cylinder 67 is designed to continue the operation of pulling the movable rod 86 downward, whereby
The support plate member 88 is disengaged from the work holder 31 newly supported by the pair of work holder support members 76, and thereafter, the operation of the lifting cylinder 67 is stopped,
The support plate member 88 is placed in the position shown in FIG.

After that, among the many work holders 31 stored in the work holder management mechanism section 60, one corresponding to the work to be newly conveyed is selected. Then, in the work holder management mechanism unit 60, the motor 68
Is operated to drive the endless chains 71A and 71B, and a large number of work holder supporting members 76 fixed to the endless chains 71A and 71B are moved to select the selected works as shown in FIG. Holder 31
The operation of the motor 68 is stopped when the pair of corresponding work holder support members 76 that support the above and are respectively fixed to the endless chains 71A and 71B and correspond to each other are set to the uppermost position. The endless chains 71A and 71B are stopped. In such a state, the selected work holder 31 is positioned directly below the holding link mechanism 49 in the connecting portion 28 provided at the end of the arm mechanism 30.

Next, the elevating cylinder 67 is activated and the movable rod 86 is pushed upward to support the support plate member 8.
8 is raised, and as shown in FIG. 8, the pair of positioning pins 87 provided on the support plate member 88 is set to the uppermost position.
Base 5 in the work holder 31 supported by 6
6 is engaged with the through hole 58a. When the engagement of the positioning pin 87 with the through hole 58a is completed, the air cylinder 85 that constitutes the clamp release mechanism 82A and the air cylinder 85 that constitutes the clamp release mechanism 82B are actuated to move the movable rods. It is pushed upwards, so that the unclamping mechanism 82A moves from its state in which its L-shaped engaging member 84 is in the position as shown by the solid line in FIG. 7 to the position as shown by the one-dot chain line in FIG. It is placed in a state in which it can be rotated to a take state. The clamp release mechanism 82B is also placed in the same state as the clamp release mechanism 82A. Each of the air cylinders 85 in each of the clamp releasing mechanisms 82A and 82B is in a state in which the L-shaped engaging member 84 (the L-shaped engaging member of the clamp releasing mechanism 82B does not appear in the drawing) is rotated. It is supposed to be maintained.

As a result, the upper ends of the L-shaped engaging members 84 in the clamp releasing mechanisms 82A and 82B spring the lower ends of the engaging members 78 constituting the clamping mechanism 81 provided on the work holder supporting member 76. It is pressed against the urging force of 79 to move the engaging member 78 to the unclamping mechanism 8
2A is rotated to a state where the position is as shown by the solid line in FIG. 7 and a state where the position is as shown by the one-dot chain line in FIG. as a result,
The hook portion 78a provided at the upper end of the engaging member 78 is
Through holes 59 provided in the base 56 of the work holder 31 supported by the pair of work holder support members 76.
Is to be disengaged.

Under such circumstances, the movable rod 86 of the lifting cylinder 67 is pushed further upward, whereby the work holder 31 supported by the pair of work holder supporting members 76 is replaced by the pair of work holders. Support member 76
And is supported by a support plate member 88 attached to the tip of the movable rod 86,
It is brought close to the holding link mechanism 49 in the connecting portion 28 provided at the end of the arm mechanism 30. When the work holder 31 supported by the support plate member 88 is brought sufficiently close to the holding link mechanism 49 in the connecting portion 28, the upward pushing of the movable rod 86 of the lifting cylinder 67 is stopped.

Subsequently, as shown in FIG. 9, the connecting portion 28
The actuator 47 of the holding link mechanism 49 is pushed downward, and the holding link mechanism 49 is pushed downward, whereby the hook members 54A and 54B of the holding link mechanism 49 are driven.
Are engaged with the engaging portions 56A and 56B provided on the base body 56 of the work holder 31, respectively, and the holding state of the work holder 31 by the holding link mechanism 49 is obtained. In this way, a new workpiece holder 31 is detachably connected to the end of the arm mechanism 30 via the connecting portion 28, and the end of the arm mechanism 30 is connected via the connecting portion 28. The replacement of the work holder 31 detachably connected is completed.

After that, the lifting cylinder 67 moves the movable rod 8
When the support plate member 88 is lowered to reach the position shown in FIG. 1, the operation of the lifting cylinder 67 is stopped.

As described above, in the example of the press work transfer apparatus according to the present invention, the work holder 31 connected to the end of the arm mechanism 30 connected to the movable mechanism 27 should be transferred. The replacement according to the type of the work is automatically and surely performed by a series of mechanical operations, whereby the time required for the work of replacing the work holder 31 is shortened.

[0042]

As is apparent from the above description, according to the press work transfer apparatus of the present invention, it is possible to change the work type of the work holder detachably connected to the end of the arm mechanism. After the work holder is connected to the end of the arm mechanism, the work holder to be replaced is supported by the work holder supporting member that does not support the work holder in the work holder management unit, and then the work holder is held. The work holder support member supporting the work holder selected according to the work in the tool management unit is moved to a position corresponding to the end of the arm mechanism by the support member transfer means, and the clamp release means moves the work holder support member. The work holder in the work holder supporting member moved to the position corresponding to the end is provided by the clamp mechanism provided in the work holder supporting member. After being released from the ramp state, the work holder supply means automatically supplies the work holder released from the clamped state to the end of the arm mechanism by a series of mechanical operations for detachably connecting the work holder. As a result, the time required to replace the work holder with respect to the arm mechanism can be shortened, and the operating rate of each press machine can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a work holder management mechanism used in an example of a press work transfer device according to the present invention.

FIG. 2 is a side view of the work holder management mechanism shown in FIG.

FIG. 3 is a configuration diagram showing an example of a press work transfer device according to the present invention together with two press machines.

FIG. 4 is a configuration diagram showing an example of a press work transfer device according to the present invention together with two press machines.

FIG. 5 is a perspective view showing an example of a work holder used in an example of a press work transfer device according to the present invention.

FIG. 6 is an enlarged view of a main part of the work holder management mechanism shown in FIG. 1.

7 is an enlarged cross-sectional view of a main part of the work holder management mechanism shown in FIG.

FIG. 8 is a cross-sectional view provided for explaining the operation of the connecting portion in the example of the press work transporting device according to the present invention.

FIG. 9 is a cross-sectional view provided for explaining the operation of the connecting portion in the example of the press work transporting device according to the present invention.

[Explanation of symbols]

 1 Press Machine 10 Press Machine 20 Work Transfer Mechanism 25, 68 Motor 27 Movable Mechanism 28 Connection 30 Arm Mechanism 31 Work Holder 39, 44 Rotation Transmission Mechanism 47 Actuator 49 Holding Link Mechanism 60 Work Holder Management Mechanism 67 67 Lifting Cylinder 71A, 71B Endless chain 76 Work holder supporting member 81 Clamping mechanism 82A, 82B Clamp releasing mechanism 88 Supporting plate member

Claims (1)

[Claims] 1. A first press disposed between a first press machine and a second press machine.
And a guide member extending in a direction connecting the second press machine, a movable mechanism engaged with the guide member so as to be capable of reciprocating along the guide member, and an arm mechanism rotatably connected to the movable mechanism. A first mechanism for moving the movable mechanism along the guide member.
Drive means, second drive means for driving the arm mechanism in accordance with the movement of the movable mechanism, and the drive means are arranged between the first and second press machines, and can be attached to and detached from the end of the arm mechanism. A workpiece holder management unit that stores and supplies a workpiece holder that is connected to the workpiece holder and that holds the workpiece to be pressed by the first and second pressing machines. A holder management unit attaches a plurality of workpiece holder support members that support each of the plurality of workpiece holders in a clamped state, and a selected one of the workpiece holder support members to the end of the arm mechanism. Support member transfer means for moving to a corresponding position, and a clamp for releasing the work holder in the work holder supporting member moved to a position corresponding to the end of the arm mechanism from the clamped state. Releasing means and, conveying apparatus of a press work the workpiece retainer, which is released from the clamped state is formed and a workpiece retainer means for supplying to the end of the arm mechanism.