JPH0741535Y2 - Attachment changing device for holding work in transfer press - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work holding attachment exchanging device for exchanging a work holder when a die is changed when a work is changed in a transfer press.

[0002]

2. Description of the Related Art Conventionally, in a transfer press, a work holder is attached to a crossbar provided in a direction perpendicular to a feed bar. In this transfer press, when the die is changed by changing the work, the crossbar with the work holder is also removed from the feed bar, placed on the die exchange carriage, and carried out of the press line. Then, the crossbar replaced with the work holder corresponding to the work was carried into the press together with the new mold, and this crossbar was manually attached to the feed bar.

[0003]

According to the above-mentioned conventional structure, a plurality of work holders (for example, suction cups) are usually attached to the crossbar, and these heavy crossbars are attached manually. The work is very troublesome and takes time.

Therefore, according to the present invention, the work holder is attached to the crossbar through the attachment, and the attachment with the work holder is automatically attached to the crossbar, so that the above-mentioned problems can be solved. An object of the present invention is to provide a holding attachment exchange device.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises a mold exchanging carriage that can move outwardly from a press line by mounting upper and lower molds and move along the press line. A crossbar is attached to a freely arranged feed bar, and a work holding attachment exchanging device for attaching and detaching work holding means to and from the cross bar is provided with a work attachment and a detachable attachment mounting member on the cross bar. An attachment support that holds the attachment mounting member is provided on the mold, and a movable support column that can be moved toward and away from the attachment support base and that is expandable and contractible is provided on the mold replacement cart, and the attachment mounting member can be held at the upper end of this movable support column. An attachment pedestal having a different holding tool is provided, and the movable support is provided between the die change carriage and the attachment support pedestal. The is provided with a strut moving device for moving through a parallel link mechanism.

[0006]

In the above structure, when the work holder is mounted together with a new mold, when the mold exchanging carriage is moved on the press line, first the strut moving device is driven to move the movable strut to the attachment support base. Move in parallel downwards, place the attachment mounting member with work holder held on the attachment support on the attachment cradle, hold it by the holder, raise the attachment cradle from the attachment cradle, and move it in parallel from the mold. Then, the attachment mounting member is opposed to the crossbar and stopped. Then, the feed bar is moved to insert and mount the crossbar into the attachment mounting member, the holder is released, and the attachment receiving base is separated from the attachment mounting member.

Therefore, since the attachment work of the attachment mounting member can be automatically performed and the attachment can be raised and mounted, it is not necessary to provide the feed bar with an extra descending stroke. Moreover, since the attachment work of the attachment mounting member is performed at a position where the mold is separated from the mold above the attachment support base, the mold replacement work can be performed in parallel. Furthermore, since the movable support can be moved in parallel to move the attachment pedestal, the attachment mounting member can be held stably and the structure of the holder can be simplified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 6, between the uprights 1a of the transfer press machine 1, a plurality of lower molds 2a to 2e (molds) are mounted on the bolster plate 4a of the mold exchanging carriage 4 at regular intervals along the press line A. At the time of replacement, the upper molds 3a to 3e are placed on the lower molds 2a to 2e), and the mold changing carriage 3 is guided by the rails 5a laid on the bed 5 to press the press machine. 1 is movably arranged outward.
A pair of left and right feedbars 6 are arranged along the press line A on both sides of the mold exchanging carriage 4, and these feedbars 6 are arranged on the work discharge side.
Is reciprocated and moved up and down in the press line A direction.

A plurality of crossbars 8 are connected between these feedbars 6 so as to be rotatable about their respective axes, and these crossbars 8 are attracted to the crossbars 8 at positions corresponding to workpieces through attachment member attachment attachment members 9. A cup (an example of a work holder) 10 is attached. Mold exchange cart 4
Above, between the lower molds 2a to 2e and between the mold 2a at the entrance and the work carrying-in position, the attachment mounting member 9 is passed between the crossbar 8 and the mold changing carriage 4 side at the time of mold changing. An attachment exchanging device 11 is arranged corresponding to each attachment mounting member 9.

This attachment exchanging device 11 is shown in FIG.
As shown in FIG. 5, the movable support column 12 erected on the base plate 4b of the mold exchanging carriage 4 and the movable support column 12 are moved toward and away from the lower molds 2a to 2e via the parallel link mechanism 13. A column moving device 14 for parallel movement, and a piston rod 1 of a lifting cylinder device 15 arranged on the movable column 12.
5a, an attachment pedestal 17 having a holder 16 for the attachment mounting member 9 is attached. The lower die 2a is provided on the die exchanging carriage 4 side.
2e is provided with an attachment support base 19 having a gripping tool 18 for the attachment mounting member 9, and the crossbar 8 is provided with a clamp device 20 for fixing the attachment mounting member 9 at a predetermined position. .

The attachment mounting member 9 is formed in a U-shaped cross section that can be fitted into the rectangular crossbar 8.
The suction cups 10 are arranged on both side surfaces 9a and 9b via mounting pipes 10a. In addition, a pair of left and right grip blocks 21 each having a positioning groove 21a formed in a trapezoidal cross section that can be sandwiched between the grips 18 of the attachment support 19 are provided on one side surface 9a. Further, a clamp pin 22 that is clamped by the holder 16 of the attachment receiving stand 17 is provided at the center of one side surface portion 9a,
Location pin holes 23 that are positioned on the attachment pedestal 17 are formed on both left and right sides. Further, on the left and right end sides of the both side surfaces 9a, a clamp receiving member 24 that is locked by a clamp device 20 provided on the crossbar 8 is projected, and a positioning pin hole 25 is formed on the inner surface of the bottom surface portion 9c. Are formed.

The parallel link mechanism 13 of the movable column 12
Is a link 13d and a link cylinder 13e, which are parallel to each other via two horizontal brackets 13a and 13b on the base plate 3b via a horizontal pin 13c parallel to the crossbar 7 and a horizontal shaft 14a. The link 13d and the link cylinder 13e are attached so as to be freely opened and rotatable, and the horizontal pins 13 are respectively attached to the tips of the link 13d and the link cylinder 13e.
Support stand 1 for the lifting cylinder device 15 via f and 13g
5b is attached, and the main body 15c is erected on the support base 15b. Reference numeral 15d is a guide rod that guides the attachment receiving base 17 up and down.

In the column moving device 14, a moving cylinder device 14b is arranged under a base plate 4b, and a piston rod of the moving cylinder device 14b is pin-connected to a drive lever 14d fixed to an interlocking shaft 14c of a bracket 13a. Has been done. Moving gears 14e and 14f meshing with each other are attached to the horizontal shaft 14a and the interlocking shaft 14c, respectively, and the expansion / contraction drive of the moving cylinder device 14b is converted into the rotation of the link 13d to move the movable column 12 to the arrows D and E.
Can be moved in any direction. In addition, the link cylinder 13e includes the upper and lower molds 2a to
Lifting cylinder device 1 when replacing 2e and 3a to 3e
5 and the attachment receiving stand 17 are used to incline and separate so as not to interfere.

As shown in FIGS. 1, 3 and 4, the attachment receiving base 17 is provided with an attachment mounting member 9
Is formed in a T-shape in plan view so as not to interfere with the respective members, and the holder 16 is openable and closable in the directions of arrows B and C with the receiving block 26 that holds the crank pin 22 at the center of the attachment receiving base 17. It comprises a holding lever 27 that clamps the clamp pin 22 with the receiving block 26, and a holding actuator 28 that is provided below the attachment receiving base 17 and has the holding lever 27 attached to the output shaft 28a. Further, location pins 29 that fit into the location pin holes 23 of the attachment mounting member 9 are provided on the mounting surface of the attachment receiving base 17 so as to project therefrom.

The crossbar 8 is, as shown in FIG.
A clamp device 20 capable of holding and releasing the attachment mounting member 9 in an externally fitted state and a positioning pin 30 fitted into the positioning pin hole 25 are provided. That is, the L-shaped clamp levers 32 rotatably supported by the support pins 31 in the press line A direction are provided on both side surfaces of the crossbar 1. A clamp claw portion 32 a that can be pressed against the clamp receiving member 24 is provided. And crossbar 1
Clamp lever drive cylinder device 33 disposed inside
The drive lever 34, the drive shaft 35, and the toggle link mechanism 36 are configured to be openable and closable.

The attachment support base 19 is shown in FIG.
As shown in FIG. 2, the support pedestal 37 is attached to the lower molds 2 a to 2 e, and the gripping tool 18 includes two sets of the air chuck 38 and the positioning metal fitting 39 arranged on the support pedestal 37 with a predetermined space. It is erected, the positioning metal fitting 39 is engaged with the positioning groove 21a of the grip block 21 to position the attachment mounting member 9, and the air chuck 3
The gripping block 21 is configured to be grippable by 8.

Next, the attachment replacement work will be described with reference to FIGS.
This will be described with reference to FIG. First, in a state in which the molds 2a to 2e, 3a to 3e and the attachment mounting member 9 are removed from the press machine 1 by the mold exchanging carriage 4,
On the outside of the press line A, an attachment mounting member 9 having a suction cup 10 previously attached to a predetermined position on another mold exchanging carriage 4 is attached to a lower mold 24 mounted on the mold exchanging carriage 4. It is supported by a table 19.

In this state, after the mold exchanging carriage 4 is carried into the press line A, the moving cylinder device 14b of the strut moving device 14 is driven to move the movable strut 12 in parallel to the lower side of the attachment support base 19, and then, The elevating cylinder device 15 is extended to raise the attachment receiving base 17 to fit the location pin 29 into the location pin hole 23 and engage with the holding recess 26 of the receiving block 26. Then, the holding actuator 28 is driven to close the holding lever 27 to hold the attachment mounting member 9 on the attachment receiving stand 17 (FIG. 7).

Then, the air chuck 38 of the gripping tool 18 is opened on the side of the attachment support base 19, the attachment mounting member 9 is lifted from the attachment support base 19 (FIG. 8), and the moving cylinder device 14b is driven to attach the attachment support base. At the same time as separating from 19, the lifting cylinder device 15 is extended to raise the attachment mounting member 9 to a position facing the cross bar 8 (FIG. 9).

Next, the feed bar 6 is moved in the direction of arrow F to fit the cross bar 8 into the attachment mounting member 9. At this time, the positioning pin 30 of the crossbar 8
Is fitted and positioned in the positioning pin hole 25 of the attachment mounting member 9, and the clamp lever drive cylinder device 33 rotates the clamp lever 32 via the toggle link mechanism 36 to clamp the clamp claw portion 32a. The attachment mounting member 9 is firmly fixed to the crossbar 8 by being pressed against the receiving surface of the receiving member 24 (FIG. 10). After that, the holding actuator 28 is driven to open the holding lever 27 to open the clamp pin 22, contract the elevating cylinder device 15, and lower the attachment base 17. Further, the crossbar 8 is rotated by 90 degrees about the axis so that the suction cup 10 faces downward. (FIGS. 11 and 12). Also, the attachment mounting member 9 can be removed by the reverse operation.

[0021]

As described above, according to the present invention, the crossbar and the work holder which are conventionally integrated are separated,
Since it is attachable to the crossbar via the attachment mounting member, it is only necessary to replace the small and lightweight attachment mounting member with a work holder. Moreover, since the attachment mounting member can be stably transferred by the movable column that moves in parallel and the mounting work of the attachment mounting member can be automatically performed, and the attachment mounting member can be raised and mounted, an extra downward stroke is provided in the feed bar. There is no need. Moreover, since the attachment work of the attachment mounting member is performed at a position where the mold is separated from the mold above the attachment support base, the mold replacement work can be performed in parallel. Further, since the movable support can be moved in parallel to move the attachment receiving base, the attachment mounting member can be stably held on the attachment receiving base, and the structure of the work holder can be simplified.

[Brief description of drawings]

FIG. 1 is a side view of a movable column showing an embodiment of an attachment exchanging device according to the present invention.

FIG. 2 is a front view of the attachment support base.

FIG. 3 is a rear half sectional view of the movable support column.

FIG. 4 is a plan view of the attachment receiving base.

FIG. 5 is a bottom view of the attachment mounting member showing a mounting state on the crossbar.

FIG. 6 is an overall plan view of the press line.

FIG. 7 is a schematic side view illustrating a mounting operation of the attachment mounting member.

FIG. 8 is a schematic side view illustrating a mounting operation of the attachment mounting member.

FIG. 9 is a schematic side view illustrating a mounting operation of the attachment mounting member.

FIG. 10 is a schematic side view illustrating a mounting operation of the attachment mounting member.

FIG. 11 is a schematic side view illustrating a mounting operation of the attachment mounting member.

FIG. 12 is a schematic side view illustrating a mounting operation of the attachment mounting member.

[Explanation of symbols]

 1 Transfer press machine 2a to 2e Upper mold 3a to 3e Lower mold 4 Mold exchange cart 5a Rail 6 Feedbar 8 Crossbar 9 Attachment mounting member 10 Suction cup 11 Attachment exchange device 12 Movable column 13 Parallel link mechanism 14 Column movement Device 14b Cylinder device for movement 15 Lifting cylinder device 16 Holding device 17 Attachment receiving base 18 Grip tool 19 Attachment supporting base 20 Clamping device 27 Holding lever 28 Holding actuator

Claims (1)

[Scope of utility model registration request] 1. A mold exchanging carriage that is capable of moving upper and lower dies and moving outward from a press line. A crossbar is attached to a feed bar movably arranged along the press line. In a work holding attachment exchanging device for attaching and detaching work holding means, a work holder is provided, a crossbar is provided with a detachable attachment mounting member, and a die is provided with an attachment support base for holding the attachment mounting member. The mold exchanging carriage is provided with a movable strut that can be moved closer to and away from the attachment support base and can be expanded and contracted, and an attachment receiving stand having a holder capable of holding an attachment mounting member is provided at the upper end of the movable strut. A strut moving device for moving the movable strut between the attachment support bases via a parallel link mechanism is installed. A device for exchanging work attachments in a transfer press.