JP5201765B2 - Work transfer device - Google Patents

Description

  The present invention relates to a workpiece transfer device between presses (press machines) (including between so-called tandem presses).

  Conventionally, workpiece transfer devices between presses (tandem presses) are required to be able to transfer workpieces at high speed while maintaining the posture of the workpieces correctly in order to improve productivity. .

For this reason, conventionally, various devices of this type have been proposed.
For example, an accumulator conveyer that sequentially conveys the work unloaded from the press on the upstream side of the machining process to a press on the downstream side of the machining process while accumulating the work on a belt conveyor rotating at a predetermined speed is provided between the presses. Known (for example, see Patent Document 1).

  In addition, a plurality of fingers (or suction means for supporting the workpiece by suction) attached to a feed bar or the like reciprocated in the workpiece conveyance direction are attached in the workpiece conveyance direction, and the workpiece is unloaded from the press on the upstream side of the machining process. It is known that workpiece transfer devices are arranged between the presses so that the workpieces are sequentially transferred to the downstream side press (or suction means) one by one in order and sequentially transferred to the press on the downstream side of the machining process. Yes.

Furthermore, in Patent Document 2, a table on which a work carried out from a press on the upstream side of the machining process is placed is configured to be reciprocable in the work conveyance direction, and the table is moved so that the work is pressed on the downstream side of the machining process. There is described a workpiece receiving apparatus that repeats the operation of returning the table to the press on the upstream side of the machining process, placing the workpiece again, and conveying the workpiece to the press on the downstream side of the machining process.
Japanese Unexamined Patent Publication No. 2000-271796 Japanese Patent Laid-Open No. 2004-223606

  However, in the accumulator type conveyor as described in Patent Document 1, since the half-processed workpieces are sequentially placed and accumulated one by one on the belt conveyor and conveyed in the downstream direction, the workpiece posture tends to collapse. At the same time, there is a concern that it will be difficult to deliver the workpiece if it is carried at high speed.

  In addition, in a workpiece transfer device that sequentially transfers workpieces between fingers attached to a feed bar or the like or between suction means, semi-worked workpieces have a variety of shapes. Since multiple types of fingers or suction means corresponding to various shapes are required, the versatility may be low and the cost may be increased, and between the fingers (or each suction means) as the conveyance speed increases. There is a risk that misgrip is likely to occur during delivery of workpieces.

  And in the workpiece | work receiving apparatus as described in patent document 2, since it is the structure which reciprocates the table in which a workpiece | work is mounted, there exists a possibility that it cannot fully respond to the increase in a conveyance speed.

  The present invention has been made in view of such circumstances, and provides a workpiece transfer device that can reduce the transfer time of a workpiece between presses and improve the production efficiency while having a simple and inexpensive configuration. For the purpose.

For this reason, the workpiece transfer apparatus according to the present invention is
A workpiece conveying device for carrying a workpiece, which is disposed between the presses and is unloaded from the upstream press in the workpiece conveyance direction, to the downstream press in the workpiece conveyance direction,
Work transfer operation after receiving the work unloaded from the work conveyance direction upstream press, moving to the work transfer direction downstream press, passing the work to the work transfer direction downstream press, and returning to the work transfer direction upstream press again Are equipped with multiple reciprocating transfer devices that can be repeated independently of each other,
Each reciprocating transfer device is
A first movement mechanism including a movement base movable in the conveyance direction on the movement guide rail, and configured to convey and drive the movement base in the conveyance direction;
An elevating mechanism that includes an elevating frame that can be moved up and down installed on the moving base;
A second moving mechanism that is installed on the elevating frame and conveys the workpiece in the conveying direction with respect to the elevating frame;
With
These multiple reciprocating transfer devices are
In order, after receiving the work unloaded from the upstream press in the work transport direction, the first drive mechanism and the second drive mechanism are operated to move to the downstream press in the work transport direction to move the work in the work transport direction. While performing the operation of passing to the downstream press,
After returning to the upstream side press in the workpiece conveyance direction after the operation, the lifting mechanism is moved up and down by the lifting mechanism so as to avoid interference with other reciprocating transfer devices. It is moved.

For this reason, the workpiece transfer apparatus according to the present invention is
A workpiece conveying device for carrying a workpiece, which is disposed between the presses and is unloaded from the upstream press in the workpiece conveyance direction, to the downstream press in the workpiece conveyance direction,
Work transfer operation after receiving the work unloaded from the work conveyance direction upstream press, moving to the work transfer direction downstream press, passing the work to the work transfer direction downstream press, and returning to the work transfer direction upstream press again Are equipped with multiple reciprocating transfer devices that can be repeated independently of each other,
The reciprocating transfer device is provided on the reciprocating transfer device, and includes a moving mechanism that can move relative to the reciprocating transfer device in a direction substantially parallel to the workpiece transfer direction.
In addition to moving the reciprocating transfer device during workpiece transfer, the workpiece is moved on the reciprocating transfer device by the moving mechanism.

In the present invention, the moving mechanism is provided with another moving mechanism that is installed on the moving mechanism and is relatively movable with respect to the moving mechanism in a direction substantially parallel to the workpiece conveyance direction.
When the workpiece is transported, the moving mechanism moves on the reciprocating transport device, and the other moving mechanism moves the workpiece on the moving mechanism provided with the other moving mechanism. be able to.

  In this invention, the support member which supports the workpiece | work of the said reciprocating conveyance apparatus can be comprised so that a movement is possible according to the to-be-supported part shape of the workpiece | work supported by the said support member.

Workpiece transfer apparatus according to the present invention is to grip the workpiece to be conveyed are gripped through the gripping unloading mechanism Wa over click upstream side press side is carried into the apparatus, the workpiece transfer direction downstream side press In a device equipped with a gripping and transporting device for transporting a workpiece in the apparatus toward the gripping and transporting the workpiece to a gripping and loading mechanism on the downstream side in the workpiece transport direction.
The direction of gripping the workpiece by the gripping and unloading mechanism is different from the direction of gripping of the workpiece by the gripping and transporting device, and the direction of gripping the workpiece by the gripping and transporting mechanism and the direction of gripping the workpiece by the gripping and transporting device And are different from each other.

  ADVANTAGE OF THE INVENTION According to this invention, although it is a simple and cheap structure, the workpiece conveyance apparatus which can shorten the conveyance time of the workpiece | work between press and can improve production efficiency can be provided.

  Hereinafter, an embodiment showing an example of a work conveying apparatus between presses according to the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the examples described below.

As shown in FIG. 1, the workpiece transfer apparatus 10 according to the first embodiment of the present invention is disposed between two presses 1 </ b> A and 1 </ b> B.
In FIG. 1, when a workpiece (not shown) is carried into the press 1A from the left side of the press 1A, the press 1A moves the slide 2A up and down to perform a predetermined pressing process on the workpiece. The workpiece (finished product or semi-finished product) that has been subjected to the predetermined pressing process and formed into a predetermined shape is, for example, via a finger 4A1 (refer to FIG. 7 or the like) (or a suction means, etc.) attached to the feed bar 3A. Then, it is unloaded from the press 1A to the work transfer device 10.

  As shown in FIG. 2, the workpiece transfer apparatus 10 includes a plurality (two in FIG. 2) of workpiece transfer units 20A and 20B corresponding to the reciprocating transfer transfer apparatus according to the present invention. The two workpiece transfer units 20A and 20B are respectively provided with transfer tables 60A and 60B. For example, when a work unloaded from the press 1A is placed on the transfer table 60A, the transfer table 60A is The workpiece moves to the downstream side in the workpiece conveyance direction, conveys the workpiece to the press 1B, and delivers the workpiece via a finger 4B1 (not shown) (or suction means, etc.) attached to a feed bar 3B provided in the press 1B. On the other hand, the transfer table 60B moves to the upstream side in the workpiece transfer direction in preparation for receiving the workpiece next unloaded from the press 1A.

  Then, when the work unloaded from the press 1A is placed on the transport table 60B, the transport table 60B moves to the downstream side in the work transport direction to transport and transfer the work to the press 1B. The table 60A moves to the upstream side in the workpiece conveyance direction in preparation for receiving the workpiece unloaded next from the press 1A. By repeating such an operation during press working, the work is transferred between the presses 1A and 1B. In FIG. 2, reference numerals 5A and 5B denote feed bar clamp units including a servo motor and the like for performing operations of clamping (gripping) and unclamping (release) workpieces of the feed bars 3A and 3B. , 6A and 6B are feed units 6A and 6B configured to include a servo motor or the like to reciprocate the feed bars 3A and 3B in the workpiece conveyance direction in order to convey the workpiece (operation of the feed bar). (See Fig. 7 etc.)

  As shown in FIG. 3 as viewed from the workpiece conveyance direction, the workpiece conveyance units 20A and 20B are arranged so that the conveyance tables 60A and 60B reciprocating in the left and right directions in FIG. 2 do not interfere with each other. 60B is configured to be movable in the vertical direction.

Here, the structure of the workpiece conveyance units 20A and 20B will be described in detail.
In the work transport unit 20A, the moving base 22 is movable on the moving guide rail 21A attached to the base 7 or the like and extending in the work transport direction (direction substantially orthogonal to FIG. 3) via the linear guide 21B or the like. Is attached. A rack 23 extending in the workpiece conveyance direction is attached to the lower portion of the moving base 22, and a pinion gear 24 is engaged with the rack 23. The pinion gear 24 is rotationally driven by an electric motor 25 such as a servo motor attached to the base 7 or the like, whereby the rack 23 extends and the moving base 22 attached to the rack 23 extends to the base 7 and presses 1A and 1B. In contrast, it is configured to be able to reciprocate in the workpiece transfer direction.

  A linear guide rail 31 extending in the vertical direction (vertical direction) in FIG. 3 is attached to the moving base 22. And the raising / lowering flame | frame 30 is attached to the said linear guide rail 31 via the linear guide 32 grade | etc., So that it can move to the up-down direction in FIG. A rack 33 extending in the vertical direction in FIG. 3 is attached to the lifting frame 30, and a pinion gear 34 is engaged with the rack 33. The pinion gear 34 is rotationally driven by an electric motor 35 such as a servo motor integrally attached to the moving base 22, whereby the rack 33 and the elevating frame 30 attached to the rack 33 are moved relative to the moving base 22. 3 is configured to be capable of reciprocating in the vertical direction in FIG.

  Furthermore, a linear guide rail 36 </ b> A extending in the workpiece conveyance direction is attached to the lifting frame 30. A moving frame 40 is attached to the linear guide rail 36A via a linear guide 36B and the like so as to be movable in the workpiece transfer direction.

  In addition, a rack 41 extending in the workpiece conveyance direction is attached to the moving frame 40, and a pinion gear 42 is engaged with the rack 41. The pinion gear 42 is rotationally driven by an electric motor 44 such as a servo motor integrally attached to the elevating frame 30 via a coupling 43 or the like, whereby the rack 41 extends and the moving frame 40 attached to the rack 41. However, the lift frame 30 and the moving base 22 are configured to be reciprocally movable in the workpiece transfer direction.

  A sliding support device 51 is attached to the moving frame 40. An endless timing belt 50 extending in the workpiece conveyance direction is wound in an oval shape, for example, and is slidably supported. A transfer table 60A is attached to a predetermined portion of the timing belt 50 via a belt clamp 52 or the like. A bracket 54 extending from the elevating frame 30 is attached via a belt clamp 53 or the like to a position that is a pair of the predetermined portions. Therefore, as described above, when the pinion gear 42 is rotationally driven by the electric motor 44 and the moving frame 40 attached to the rack 41 and then the rack 41 is moved in the workpiece conveying direction with respect to the lifting frame 30. The sliding support device 51 attached to the moving frame 40 also moves in the workpiece conveyance direction in conjunction with it.

  At this time, since the belt clamp 53 integrally attached to the timing belt 50 wound around the sliding support device 51 is fixed to the lift frame 30 via the bracket 54, When the moving frame 40 is moved in the workpiece conveying direction with respect to the lifting / lowering frame 30, the slide support device 51 slides in the wound timing belt 50 and moves relative to the belt clamp 53. To do.

  Therefore, as shown in FIGS. 4A to 4C, the workpiece clamp direction with respect to the belt clamp 52 fixed to the timing belt 50 and the bracket 54 of the transfer table 60 </ b> A (60 </ b> B) and the lift frame 30. The relative position at will change.

  In this embodiment, the pinion gear 42 is rotationally driven by the electric motor 44 by using this, and the moving frame 40 attached to the rack 41 extends to the lifting frame 30 and the moving base 22. When reciprocating in the workpiece conveyance direction, the conveyance table 60A (60B) is reciprocated relative to the moving frame 40 in conjunction with the movement frame 40 in the same direction as the moving frame 40. It is configured to be able to.

In other words, in this embodiment, the transfer tables 60A and 60B are moved by the three movement mechanisms (the movement by the rack 23 and the pinion gear 24 using the electric motor 25 as a drive source) for reciprocation in a direction substantially parallel to the workpiece transfer direction. mechanism (first moving mechanism), the moving mechanism by the rack 41 and the pinion gear 42 to the electric motor 44 driving source (second moving mechanism), the moving mechanism by a timing belt 50 and the sliding supporting device 51 (third moving mechanism) 3), the lifting frame 30 can be moved up and down in the vertical direction in FIG.

  The workpiece transfer unit 20B has the same configuration as the workpiece transfer unit 20A described above, and is arranged symmetrically with respect to the workpiece transfer center. Except for those, the same reference numerals are given, and detailed description will be omitted.

Operations of the workpiece transfer units 20A and 20B having such a configuration are controlled in accordance with a control command from a control device (not shown) as shown in the timing chart of FIG.
5A shows that the workpiece is loaded from the press 1A to the transfer table 60A (No. 1 TABLE) at the workpiece receiving position (X position), and the workpiece is transferred from the transfer table 60B (No. 2 TABLE). A state is shown in which the workpiece is unloaded to the press 1B at the position (Y position).

  In the next step, as shown in FIG. 5B, the transfer table 60A (No. 1 TABLE) on which the workpiece is placed moves along the white arrow in FIG. 5B. Then, the workpiece is conveyed toward the press 1B. The workpiece and the conveying table 60A (No. 1 TABLE) are conveyed (conveyed in the workpiece conveying direction) by rotating and driving the electric motor 25 provided in the workpiece conveying unit 20A. A moving mechanism for moving in the conveying direction, a moving mechanism for rotating the electric motor 44 to move the moving frame 40 in the workpiece conveying direction with respect to the moving base 22, and a timing belt by rotating the electric motor 44 for driving. The moving table 60A is moved with respect to the moving base 22 in the workpiece transfer direction by changing the relative positional relationship between the slider 50 and the sliding support device 51. In this embodiment, the three-way mechanism is used to reciprocate in a direction substantially parallel to the workpiece conveyance direction, so that the workpiece can be conveyed and returned at a high speed, and the electric motor is used as the drive source. In combination with the above, it is possible to easily change the acceleration as desired during the work transfer or return operation.

  On the other hand, the transfer table 60B (No. 2 TABLE) that has been emptied after unloading the workpiece moves along the hatched arrow in FIG. 5B and moves toward the press 1A. At this time, the transfer table 60B (No. 2 TABLE) that moves along the hatched arrow in FIG. 5B avoids interference with the approach table 60A (No. 1 TABLE) that approaches. In addition, the electric motor 35 is driven to move the elevating frame 30 downward so that the electric motor 35 is moved toward the press 1A so as to pass below the transport table 60A (No. 1 TABLE).

  The transport table 60A (No. 1 TABLE) thus moved reaches the workpiece transfer position (Y position) to the press 1B as shown in FIG. 5C, and the transport table 60B (No. .2 TABLE) reaches the workpiece receiving position (X position) from the press 1A and prepares for the next operation.

  Next, FIG. 5D shows a state in which the workpiece is loaded from the press 1A to the transfer table 60B (No. 2 TABLE) and is transferred from the transfer table 60A (No. 1 TABLE) to the press 1B. Yes.

  In the next step, as shown in FIG. 5 (e), the transfer table 60B (No. 2 TABLE) on which the workpiece is placed moves along the white arrow in FIG. 5 (e). Then, the workpiece is conveyed toward the press 1B. On the other hand, the transfer table 60A (No. 1 TABLE) that has been emptied after unloading the workpiece moves along the hatched arrow in FIG. 5E and moves toward the press 1A. At this time, the transport table 60A (No. 1 TABLE) that moves along the hatched arrow in FIG. 5 (e) avoids interference with the transport table 60B (No. 2 TABLE) that approaches. In addition, the electric motor 35 is driven to move the elevating frame 30 downward, so that the electric motor 35 is moved toward the press 1B so as to pass below the conveyance table 60B (No. 2 TABLE).

The transport table 60B (No. 2 TABLE) thus moved reaches the workpiece transfer position (Y position) to the press 1B as shown in FIG. 5 (f), and the transport table 60A (No. .1 TABLE) reaches the workpiece receiving position (X position) from the press 1A and prepares for the next operation.
One cycle operation is completed by the timing chart shown in FIGS. 5A to 5F as described above, and the operation is repeated during press working.

Here, a more detailed operation will be described with reference to FIGS.
(A) in FIG. The state of change with respect to time of transfer FEED (forward movement “ADVANCE” and backward movement “RETURN” of the feed bar 3A) in one press (press 1A) is shown.
(B) in FIG. The state of change with respect to time of transfer LIFT (uplift “LIFT” and lowering “DOWN” of the feed bar 3A) in one press (press 1A) is shown.
(C) of FIG. The state of change with respect to time of transfer CLAMP (work clamp “CLAMP” and unclamp “UNCLAMP” via feed bar 3A) in one press (press 1A) is shown.

  Here, the forward movement “ADVANCE” and the backward movement “RETURN” of the feed bar 3A of the feed bar 3A, the rising “LIFT” and the lowering “DOWN” of the feed bar 3A, and the clamp “CLAMP” of the work W via the feed bar 3A. ”And“ UNCLAMP ”are schematically illustrated in FIG. 7.

  FIG. 7 shows that the workpieces W1, W2,... WN (N is an integer) are clamped by fingers 4A1, 4A2,... 4AN (N is an integer) attached to the feed bar 3A. FIG. 6 schematically shows a state where the workpiece W1 is brought down on the transfer table 60A that has been moved to the X position and is waiting. Thereafter, the fingers 4A1, 4A2,... 4AN attached to the feed bar 3A are unclamped and returned to the upstream side in the workpiece conveyance direction. Then, the workpieces W2, W3,... WN are clamped and advanced by fingers 4A1, 4A2,... 4AN attached to the feed bar 3A, and the X-position is waited for the next workpiece transfer. The work W2 is brought onto the existing conveyance table 60B.

Returning to the description of FIG. 6 again, FIG. The state of the change with respect to the time of FEED (conveyance movement) of 1 table (conveyance table 60A) is shown. (E) of FIG. The state of the change with respect to the time of LIFT (up-and-down movement through the raising / lowering frame 30) of 1 table (conveyance table 60A) is shown.
Further, (i) in FIG. The state of the change with respect to the time of FEED (conveyance movement) of 2 tables (conveyance table 60B) is shown. (J) in FIG. The state of the change with respect to time of LIFT (up-and-down movement through the raising / lowering frame 30) of 2 tables (conveyance table 60B) is shown.

  That is, as shown in FIG. 6C, when the finger 4A1 attached to the feed bar 3A brings down the work W1 on the transfer table 60A and then is unclamped (FIG. 6). 0s (second) position), as shown in FIG. No. 1 table (transport table 60A) is No. 2. Move (ADVANCE) toward the Y position, which is the workpiece transfer position of the press (press 1B). In this movement (ADVANCE), as shown in FIG. One table (conveying table 60A) is lifted upward.

  On the other hand, as shown in FIG. In the Y position, which is the workpiece transfer position of 2 presses (press 1B), no. When a finger 4B1 (not shown) similar to the finger 4A1 attached to the feed bar 3B of 2 presses (press 1B) clamps the workpiece on the transfer table 60B and the lift is completed, ( As shown in i), no. No. 2 table (transport table 60B) is No.2. The movement (RETURN) is started toward the X position which is the work receiving position of one press (press 1A).

  In this movement (RETURN), as shown in FIG. The two tables (transport table 60B) are lowered (DOWN) over C seconds downward after B seconds (sec) after the start of the movement (RETURN), and maintained in the down state for D seconds and then again over E seconds. Lifted (LIFT), No. Control is performed so as to reach the X position which is the work receiving position of one press (press 1A), and the same control is performed thereafter. In addition, about the time mentioned above, it is an example and is not limited to this.

By controlling in this way, even if the two transfer tables 60A (No. 1 TABLE) and the transfer table 60B (No. 2 TABLE) are reciprocated between the X position and the Y position, respectively, Interferences can be avoided, so that the work conveyance speed between the press 1A and the press 1B can be improved, and as a result, the production efficiency of the press can be improved.
Incidentally, (f) of FIG. FIG. 6 (g) shows the state of change with time of transfer FEED (work transfer: forward movement “ADVANCE” and reverse movement “RETURN”) of the feed bar 3B in the two presses (press 1B). . 6 shows how the transfer LIFT (upward “LIFT” and downward “DOWN” of the feed bar 3B) changes with time in the 2 press (press 1B). The state of change with time of transfer CLAMP (clamping (gripping) “CLAMP” and unclamping (release) “UNCLAMP” of the workpiece via the feed bar 3B) in the two presses (press 1B) is shown.

  Here, a configuration example of the transport tables 60A and 60B according to the present embodiment will be described with reference to FIG. Since the transport tables 60A and 60B have the same configuration, the transport table 60A will be representatively described.

  In this embodiment, as already described with reference to FIG. 7, the workpiece W1 clamped by the finger 4A1 attached to the feed bar 3A and advanced with the feed bar 3A being lifted is fed to the feed bar at the X position. By moving 3A down and unclamping the clamp by the finger 4A1, the work table W1 is received by the transfer table 60A. At this time, the work W1 is placed on the work support base 63 as shown in FIG. Placed.

  As shown in FIG. 8, the transfer table 60A extends on and attaches to the moving frame 40 in the workpiece transfer direction (direction substantially orthogonal to the plane of FIG. 8), and slides on the guide rail 62A. The movable frame 40 is supported so as to be movable in the workpiece conveyance direction via a linear guide device 62 including a linear guide 62B that is freely supported and attached to the conveyance table support frame 61. The movement of the transfer table 60A in the workpiece transfer direction changes the relative positional relationship between the timing belt 50 and the sliding support device 51 by rotating the electric motor 44 as already described with reference to FIG. Is made by

The conveyance table support frame 61 of the conveyance table 60A is provided with an electric motor 64, a work guide support pin driving mechanism 65 described later, and the like, and a work support base 63 on which the work W1 is placed.
As shown in FIGS. 8 and 9, the work support base 63 has a plurality of work guide support pins 66 (see FIGS. 8 and 9) for maintaining a good posture of the work W <b> 1 that is a finished product or a semi-processed product. There are four). The work guide support pin 66 corresponds to a support member according to the present invention. Here, the work guide support pin drive mechanism 65 includes a driven gear 65A, a rotary shaft 65B, trapezoidal screws 65B1 and 65B2, moving elements 65C1 and 65C2, support bars 65D1 and 65D2, support portions 65E1 and 65E2, and the like. Has been.

  As shown in FIGS. 8 and 9, the work guide support pin 66 is movably inserted into a guide groove 63A provided in the work support base 63, and its base end is attached to the support portions 65E1 and 65E2. ing. The support portions 65E1 and 65E2 are slidably attached to the support bars 65D1 and 65D2 along the rod-like support bars 65D1 and 65D2, while one end portions of the support bars 65D1 and 65D2 are attached to the moving elements 65C1 and 65C2. ing.

The moving elements 65C1 and 65C2 are screwed into a rotating shaft 65B on which trapezoidal screws 65B1 and 65B2 and the like are formed, and are moved in the left-right direction in FIG. 9 as the rotating shaft 65B rotates. It has become. The trapezoidal screws 65B1 and 65B2 to which the moving elements 65C1 and 65C2 are screwed are formed as mutually reverse screws, and therefore when the moving element 65C1 moves in the right direction (left direction) in FIG. The moving element 65C2 is moved in the left direction (right direction) in FIG.
The moving elements 65C1 and 65C2 are screwed into a rotating shaft 65B on which trapezoidal screws 65B1 and 65B2 and the like are formed, and a part of the work guide support pin driving mechanism 65 is moved along with the rotating operation of the rotating shaft 65B. Configure

Here, the rotary shaft 65B is configured to be rotationally driven by an electric motor 64 that is rotationally connected to a drive gear 64A that meshes with a driven gear 65A attached to the end thereof.
Accordingly, when the electric motor 64 is driven to rotate the rotation shaft 65B by a predetermined amount (predetermined angle), the moving elements 65C1 and 65C2 are moved in a direction approaching or separating from each other, and the moving element 65C1 is moved. , 65C2 and the work guide support pins 66 are moved in the direction of approaching or separating from each other along the guide grooves 63A1 and 63A2, and the work guide support pins 66 are arranged accordingly. The shape of the supported portion of the workpiece W1 supported by (for example, in FIG. 8 and FIG. 9, the inner diameter portion of the disc-shaped workpiece 1 is the supported portion, but is not limited to this. Accordingly, the outer shape portion and other parts can be supported.

  As a result, the workpiece W1 is favorably supported by the workpiece guide support pins 66, and the posture of the workpiece W1 being conveyed is well maintained, and various workpieces W1 that are finished products or semi-finished products having various shapes can be obtained. Since the work guide support pins 66 can be aligned easily and quickly according to the shape of the supported part, the work can be supported, so there is no need to prepare a plurality of jigs and the like, and the setup time can be reduced. Can also contribute. Note that the electric motor 65 may not be provided, and the operator may align the work guide support pins 66 manually.

  As described above, according to the present embodiment, the two workpiece transfer units 20A and 20B can be reciprocated between the press 1A and the press 1B so that they do not interfere with each other. Therefore, compared with the conventional workpiece conveyance apparatus as described in Patent Documents 1 to 3, the workpiece conveyance speed between the press 1A and the press 1B can be improved, and thus the production speed of the press ( SPM) (Stroke per minute: number of slide strokes / minute) can be followed, and as a result, production efficiency can be improved.

  In addition, although the present Example demonstrated the case where the 2 workpiece | work conveyance units 20A and 20B were provided, this invention is not limited to this, and also when a 3 or more several workpiece conveyance unit is provided. Applicable,

  In the present embodiment, the workpiece conveyance unit 20A on the side returning from the press 1B to the press 1A (moving on the return path) in consideration of the disturbance of the posture of the workpiece during conveyance of the workpiece between the press 1A and the press 1B. (Or 20B) is configured to avoid mutual interference by moving up and down, for example, but is not limited to this, and is not limited to this, and is a work transport unit that is transporting a work from the press 1A to the press 1B (moving on the forward path) For example, 20A (or 20B) is moved up and down to avoid mutual interference, or both workpiece transfer units 20A and 20B moving in the forward and return paths are moved up and down to avoid mutual interference. Can do.

  Furthermore, in the present embodiment, the workpiece transfer units 20A and 20B have been described as moving up and down to avoid mutual interference. However, the present invention is not limited to this, and the workpiece transfer units 20A and 20B are moved in the left-right direction and the diagonal direction. Thus, mutual interference can be avoided.

  In this embodiment, the transfer tables 60A and 60B have been described using a configuration example in which the transfer tables 60A and 60B are reciprocated in a direction substantially parallel to the workpiece transfer direction using three moving mechanisms (three-stage moving mechanism). The invention is not limited to this, and can be configured with one (one stage) or more moving mechanisms. Moreover, regarding the movement in the vertical direction, in this embodiment, a single movement mechanism that moves the lifting frame 30 up and down is exemplified, but the present invention is not limited to this, and a plurality of movement mechanisms in the vertical direction are provided. Steps can also be provided.

  The workpiece transfer apparatus 100 according to the second embodiment of the present invention is disposed between two presses 1A and 1B as shown in FIG. In addition, the same code | symbol is attached | subjected to the element similar to Example 1, and detailed description here is abbreviate | omitted.

  The above-described first embodiment has described an example in which the work transfer time is shortened by increasing the work transfer speed between presses (or so-called tandem presses), thereby improving the production efficiency. However, in this embodiment, the waiting time for receiving (or handing) the workpiece between the press and the workpiece transfer device disposed between the presses is shortened, so that the workpiece transfer time is shortened. An example in which the efficiency is improved will be described.

  As shown in FIG. 10, in the present embodiment, as in the case of the first embodiment, when a work (not shown) is carried into the press 1A from the left side of the press 1A, the slide 1A is moved up and down in the press 1A. Then, a predetermined press process is performed on the workpiece. The workpiece (finished product or semi-processed product) that has been subjected to the predetermined pressing process and is molded into a predetermined shape is, for example, a finger 4A1 (see FIGS. 7, 11, etc.) attached to the feed bar 3A (or an adsorbing means, etc.) Then, the workpiece is carried out from the press 1A to the workpiece transfer device 100.

  As shown in FIG. 11, the workpiece transfer apparatus 100 is configured to include a workpiece support base 101 that places a plurality of workpieces W side by side in the workpiece transfer direction at predetermined intervals. In addition, the workpiece transfer device 100 transfers (advances) the workpiece W by the predetermined interval toward the downstream side in the workpiece transfer direction in a state where each workpiece W on the workpiece support base 101 is clamped, and unclamps ( The feed mechanism 102 that sequentially conveys the workpieces W is provided. FIG. 11A shows a state where the workpieces W and W0 are held by the fingers 4A and 102B before the workpiece W0 is transported to the X position. FIG. 11B shows a state where the workpieces W and W0 are gripped by the fingers 4A and 102B after the workpiece W0 is transported to the X position.

  Here, the feed mechanism 102 of the workpiece transfer device 100 according to the present embodiment receives the workpiece W from the press 1A (or the delivery of the workpiece W to the press 1B) and the feed bar 3A of the press 1A and the feed bar 3A. The receiving position (X position) of the workpiece W from the press 1A or the passing position (Y of the workpiece W to the press 1B) so as not to interfere with the attached finger 4A1 (or the feed bar 3B and the finger attached thereto) or the like. In the position), the workpiece W is grasped from a direction different from that of the feed bar 3A and the finger 4A1 attached thereto.

  As an example, as shown in FIG. 11, the feed mechanism 102 according to the present embodiment includes a feed member 102A that is arranged by extending the workpiece W in the workpiece conveyance direction, and a downward direction from the feed member 102A. And a finger 102B configured to extend relative to the feed member 102A and to grip the workpiece W from the upstream side in the workpiece conveyance direction.

  The feed member 102A is driven by a reciprocating mechanism (not shown) using a servo motor or the like (not shown) as a drive source, and is configured to be able to move forward (advance) and return (return) in the workpiece transfer direction. It is driven by a vertical movement mechanism (not shown) using a servo motor or the like (not shown) as a drive source, and is configured to move upward (lift) and downward (down) as shown in FIG. Similarly, the clamping / unclamping operation of the finger 102B is performed by a relative movement mechanism with respect to a feed member 102A using a servo motor (not shown) as a drive source. Since the feed member 102A returns in a lifted state, there is no interference between the fingers 102B attached to the feed member 102A and the workpieces W placed on the workpiece support base 101 when returning.

  Thus, in the present embodiment, the workpiece W is gripped from a direction different from the feed bar 3A of the press 1A and the finger 4A1 attached thereto at the receiving position (X position) of the workpiece W from the press 1A. Since the feed bar 3A and the finger 4A1 attached to the feed bar 3A and the like are returned and retracted upstream in the workpiece conveyance direction at the X position, it is not necessary to approach the workpiece W placed at the X position. Even when the feed bar 3A and the fingers 4A1 attached thereto are in the X position, it is possible to keep close to the work W placed in the X position.

  For this reason, immediately after the feed bar 3A and the finger 4A1 attached thereto unclamp (release) the workpiece W at the X position, the workpiece W is clamped by the finger 102B to advance the feed member 102A in the workpiece conveyance direction. Since the workpiece can be transported, the waiting time for receiving the workpiece W can be shortened, thereby shortening the workpiece transport time and improving the production efficiency.

Similarly, in this embodiment, the workpiece W is gripped from a direction different from the feed bar 3B of the press 1B and the fingers attached to the press 1B at the transfer position (Y position) of the workpiece W to the press 1B. Therefore, the feed bar 3B of the press 1B and the fingers attached thereto are moved upstream in the workpiece conveyance direction (return) after the feed member 102A and the fingers 102B of the feed mechanism 102 advance and place the workpiece W at the Y position. It is not necessary to approach the workpiece W placed at the Y position after retreating in the direction), and approach the workpiece W placed at the Y position even when the feed member 102A or the finger 102B of the feed mechanism 102 is at the Y position. It is possible to keep it.
The gripping and unloading mechanism according to the present invention corresponds to a work unloading mechanism including a feed bar 3A on the press 1A side and a finger 4A, and the gripping and unloading mechanism according to the present invention is a feed bar 3B on the press 1B side. And a workpiece gripping mechanism including a finger or the like attached thereto.

  For this reason, immediately after the feed member 102A, the finger 102B, etc. unclamp (release) the workpiece W at the Y position, the workpiece W is clamped by the feed bar 3B of the press 1B and the fingers attached thereto, etc. Since 3B can be advanced in the workpiece conveyance direction and the workpiece W can be conveyed into the press 1B, the waiting time for delivery of the workpiece W to the press 1B can be shortened, and thus the workpiece conveyance time can be reduced. The production efficiency can be improved by shortening.

  In addition, since the waiting time for delivery can be shortened, for example, the shortened time can be provided as a time allowance for the clamping operation during delivery of the workpiece between the press and the workpiece transfer apparatus 100. Even if the workpiece transfer speed is increased, the occurrence of misgrip can be suppressed as compared with the prior art.

  By the way, in the present embodiment, the feed mechanism 102 of the workpiece transfer apparatus 100 has been described as being configured to place a plurality of workpieces W on the workpiece support base 101 at predetermined intervals and simultaneously transfer them in the workpiece transfer direction. The present invention is not limited to this, and the present invention can also be applied to the case where one work W is placed on the work support base 101 and conveyed.

  In this embodiment, the feed mechanism 102 of the workpiece transfer device 100 is substantially orthogonal to the feed bar 3A of the press 1A and the finger 4A1 attached thereto (or the feed bar 3B of the press 1B and the finger attached thereto). The case where the workpiece W is gripped from the direction in which the workpiece W is gripped has been described as an example. However, the present invention is not limited to this, and the press 1A can be used when receiving the workpiece W from the press 1A (or delivering the workpiece W to the press 1B). Any other angle can be used as long as it does not interfere with the feed bar 3A and the finger 4A1 attached thereto (or the feed bar 3B of the press 1B and the finger attached thereto).

  In addition, various modifications can be made without departing from the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view (figure seen from the direction orthogonal to a workpiece conveyance direction) which shows schematically the whole structure of the workpiece conveyance apparatus between presses of Example 1 which concerns on this invention. It is a front view for demonstrating the structural example of the workpiece conveyance unit of the conveyance apparatus between presses of an Example same as the above (the figure seen from the direction orthogonal to a workpiece conveyance direction). FIG. 3 is a side view for explaining a configuration example of the work transfer unit in FIG. 2 (a view seen from the downstream side in the work transfer direction). It is a figure which illustrates typically the moving mechanism of the conveyance table with respect to the workpiece conveyance direction via the timing belt and sliding support apparatus which are used for the workpiece conveyance unit of an Example same as the above. It is a timing chart explaining the mode of conveyance of the conveyance table which concerns on an Example same as the above. The state of workpiece conveyance in the workpiece conveyance direction upstream press (No. 1 press) according to the embodiment, the conveyance table conveyance state, and the workpiece conveyance direction downstream press (No. 2 press) It is a timing chart explaining a mode. It is a schematic diagram explaining the mode of operation | movement of the feed bar and finger which concern on an Example same as the above. It is a side view (figure seen from the workpiece conveyance direction) for demonstrating the structural example of the conveyance table which concerns on an Example same as the above. It is a top view for demonstrating the structural example of the conveyance table which concerns on an Example same as the above. It is a front view (figure seen from the direction orthogonal to a workpiece conveyance direction) which shows roughly the whole structure of the workpiece conveyance apparatus between presses of Example 2 concerning the present invention. It is a schematic diagram for demonstrating the mode of the conveyance of the workpiece | work in the press and workpiece conveyance apparatus which concern on an Example same as the above.

Explanation of symbols

1A Workpiece conveyance direction upstream press 1B Workpiece conveyance direction downstream press 3A Feed bar 4A Finger 10 Work conveyance device 20A, 20B Work conveyance unit 22 Movement base (for movement in the workpiece conveyance direction)
30 Elevating frame (for vertical movement)
40 Moving frame (for moving in the workpiece transfer direction)
50 Timing belt (for movement in the workpiece transfer direction)
51 Sliding support device (for movement in workpiece transfer direction)
60A, 60B Transport table 65 Work guide support pin drive mechanism 66 Work guide support pin (corresponding to the support member according to the present invention)
DESCRIPTION OF SYMBOLS 100 Work conveying apparatus 101 Work support stand 102 Feed mechanism 102A Feed member 102B Finger

Claims (5)

A workpiece conveying device for carrying a workpiece, which is disposed between the presses and is unloaded from the upstream press in the workpiece conveyance direction, to the downstream press in the workpiece conveyance direction,
Work transfer operation after receiving the work unloaded from the work conveyance direction upstream press, moving to the work transfer direction downstream press, passing the work to the work transfer direction downstream press, and returning to the work transfer direction upstream press again Are equipped with multiple reciprocating transfer devices that can be repeated independently of each other,
Each reciprocating transfer device is
A first movement mechanism including a movement base movable in the conveyance direction on the movement guide rail, and configured to convey and drive the movement base in the conveyance direction;
An elevating mechanism that includes an elevating frame that can be moved up and down installed on the moving base;
A second moving mechanism that is installed on the elevating frame and conveys the workpiece in the conveying direction with respect to the elevating frame;
With
These multiple reciprocating transfer devices are
In order, after receiving the work unloaded from the upstream press in the work transport direction, the first drive mechanism and the second drive mechanism are operated to move to the downstream press in the work transport direction to move the work in the work transport direction. While performing the operation of passing to the downstream press,
After returning to the upstream side press in the workpiece conveyance direction after the operation, the lifting mechanism is moved up and down by the lifting mechanism so as to avoid interference with other reciprocating transfer devices. A workpiece transfer device that is moved. A workpiece conveying device for carrying a workpiece, which is disposed between the presses and is unloaded from the upstream press in the workpiece conveyance direction, to the downstream press in the workpiece conveyance direction,
Work transfer operation after receiving the work unloaded from the work conveyance direction upstream press, moving to the work transfer direction downstream press, passing the work to the work transfer direction downstream press, and returning to the work transfer direction upstream press again Are equipped with multiple reciprocating transfer devices that can be repeated independently of each other,
The reciprocating transfer device is provided on the reciprocating transfer device, and includes a moving mechanism that can move relative to the reciprocating transfer device in a direction substantially parallel to the workpiece transfer direction.
In addition to the movement of the reciprocating transfer apparatus during the transfer of the work, the work transfer apparatus moves the work on the reciprocating transfer apparatus by the moving mechanism. The moving mechanism is installed on the moving mechanism, and is configured to include another moving mechanism that can move relative to the moving mechanism in a direction substantially parallel to the workpiece conveyance direction.
When the workpiece is transported, the moving mechanism moves on the reciprocating transport device, and the other moving mechanism moves the workpiece on the moving mechanism provided with the other moving mechanism. The workpiece transfer apparatus according to claim 2.   The support member for supporting the workpiece of the reciprocating transfer device is configured to be movable according to the shape of the supported portion of the workpiece supported by the support member. The workpiece conveyance apparatus as described in any one. After gripping and unloading the workpiece that is gripped and unloaded via the gripping and unloading mechanism on the upstream side in the workpiece transport direction, and then transporting the workpiece in the device toward the downstream press in the workpiece transport direction , Equipped with a gripping and transporting device for gripping the workpiece and carrying it out to the gripping and loading mechanism on the downstream side of the workpiece transport direction,
The direction of gripping the workpiece by the gripping and unloading mechanism is different from the direction of gripping of the workpiece by the gripping and transporting device, and the direction of gripping the workpiece by the gripping and transporting mechanism and the direction of gripping the workpiece by the gripping and transporting device And the workpiece conveying apparatus according to claim 1, wherein the workpiece conveying apparatus is different from the workpiece conveying apparatus.