JPH0367770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a workpiece conveyance device for a press machine.

[Prior Art] As shown in FIG. 4, a press device 1 includes a recessed work space 2 in the center thereof. In the work space 2, a lower mold 3 is located at the lower end of the work space 2.
However, upper molds 4 are arranged at their upper ends. Further, in the type shown in FIG. 4, the workpiece conveyance device 5 is arranged on the front side (left side in the drawing) of the press device 1 and is fixed to the press device 1. A feed rod 6 extending into the work space 2 is attached to the workpiece conveyance device 5 .

In the press device 1 shown in FIG. 4, when replacing the molds 3 and 4, the upper mold 4 is lowered and placed on the lower mold 3, and the workpiece conveyance device 5 is moved to the press device 1.
After removing the molds 3 and 4 from the paper, both molds 3 and 4 are pulled out to the left in the drawing.

In another type of press device 11 shown in FIG. 5, a workpiece conveyance device 15 is arranged at the back of the work space 12. As shown in FIG. In addition, in FIG. 5, 13 is a lower mold, 14 is an upper mold, and 16 is a feed rod. In this case, since the workpiece conveyance device 15 is arranged at the back side of the work space 12, a sufficient space is secured at the back side of the work space 12.

[Problems to be Solved by the Invention] The conventional press device 1 shown in FIG. 4 has a problem in that the workpiece conveyance device 5 must be removed each time the molds 3 and 4 are replaced.
For this reason, with the press apparatus shown in FIG. 4, it is not possible to quickly and easily replace the mold.

On the other hand, in the conventional press device 11 shown in FIG. 5, the workpiece conveyance device 15 does not get in the way when the molds 13 and 14 are replaced. However, in this configuration, it is necessary to secure sufficient space at the back of the work space 12 in order to arrange the workpiece conveyance device 5. For this reason, the press apparatus 11 shown in FIG. 5 has the problem that the press apparatus 11 becomes large in order to secure a large working space 12, or that large molds 13 and 14 cannot be used.

An object of the present invention is to provide a workpiece conveyance device for a press machine that eliminates the need to secure a space for the workpiece conveyance device within the working space of a press machine, and that allows quick and simple mold replacement. It is about providing.

[Means for Solving the Problems] The present invention provides a plurality of lower molds arranged at intervals along the workpiece conveyance direction, and a plurality of upper molds provided corresponding to the lower molds. It is a workpiece conveyance device for a press machine that is equipped with a mold and is configured to perform press processing sequentially and stepwise by a pair of upper and lower molds located above and below. It includes a rod, a feeding rod, a common rod support member, and a common rod feeding mechanism.

The common rod extends along the workpiece conveyance direction on the mold removal side, and can be arranged at a position higher than the upper end of the upper mold when exchanging the upper and lower molds.

The feeding rod has a base attached to the common rod, extends from the common rod side to the mold side, and is located in a space between adjacent molds along the workpiece conveyance direction when exchanging upper and lower molds.

The common rod support member supports the common rod on the mold removal side and is arranged at a position that avoids the mold moving path when exchanging the upper and lower molds.

The common rod feeding mechanism reciprocates the common rod in its longitudinal direction.

[Function] The common rod is supported by the common rod support member on the mold removal side. Further, the common rod is configured to be reciprocated in the longitudinal direction of the common rod by a common rod feeding mechanism. Through this reciprocating motion, the feed rod attached to the common rod carries the work into the mold and transports the work from the mold. By synchronizing these workpiece conveyance operations with the mold movement operations of the press machine, it becomes possible to automatically carry the workpieces into and out of the molds of the press machine.

On the other hand, the common rod can be placed at a higher position than the upper end of the upper mold when exchanging the upper and lower molds. The feeding rod is located in the space between adjacent molds along the workpiece conveyance direction when exchanging the upper and lower molds. Further, the common rod support member is arranged at a position that avoids the mold movement path when exchanging the upper and lower molds.
Therefore, even if the workpiece conveyance device is disposed on the mold removal side, the workpiece conveyance device will not get in the way when replacing the mold. This allows the mold to be replaced quickly and easily.

In addition, since the workpiece conveyance device is located on the mold removal side, there is no need to secure space for the workpiece conveyance device within the work space of the press device.
Accordingly, it becomes possible to use a larger mold and to downsize the press apparatus.

[Example] In FIG. 1 showing an example of the present invention, a workpiece conveyance device has a common rod 21, a feeding rod 22, a common rod support member 23, and a common rod feeding mechanism 24. .

The common rod 21 is in the workpiece conveyance direction (arrow X direction)
It is a rod-shaped member that extends along the . Further, as shown in FIG. 2, the common rod 21 is arranged on the front side of the press device 25 (on the left side in FIG. 2).

The press device 25 has a work space 26 that opens toward the common rod 21 side. work space 2
6, a lower mold 27 is arranged at its lower end, and an upper mold 28 is arranged at its upper end. Incidentally, the upper mold 28 is configured to be driven in the vertical direction by a drive mechanism (not shown) disposed within the press device 25. Further, as shown in FIG. 3, four molds 27 and 28 are provided, and they are arranged at equal intervals in the X direction. Note that each of the molds 27 and 28 is provided for various press operations such as drilling and flange forming.

Five feeding rods 22 are arranged at equal intervals in the X direction, and their bases are fixed to the common rod 21. The arrangement pitch of each feed rod 22 is
The arrangement pitch is set to be the same as that of 7 and 28.
In addition, the width of each feed rod 22 in the X direction is
The interval is set slightly smaller than the interval of 28. As shown in FIG. 2, the feed rod 22 is the common rod 2.
Extending diagonally downward into the work space 26 from the 1 side,
It has a chuck portion 29 extending horizontally at its tip. The chuck part 29 is arranged between the lower mold 27 and the upper mold 28, and has a
A work suction device (not shown) for suctioning the work is attached. Note that as the workpiece suction device, for example, a mechanism using vacuum suction or magnetic suction is adopted.

As shown in FIG. 1, a rail member 30 extending in the X direction is attached to the right end of the common rod 21. As shown in FIG. 2, the rail member 30
are arranged between a pair of guide members 31 arranged above and below the common rod 21.
It is slidable only in this direction and in the opposite direction. The guide member 31 is fixed to a grip member 32 arranged at the upper end of the common rod support member 23.
The gripping member 32 includes a support rod 3 extending in the vertical direction.
It is fixed at the top of 3. The support rod 33 is
It is fitted into the guide cylinder 34 so as to be slidable in the vertical direction. The guide cylinder 34 is attached to the bracket 3
It is fixed to the press device 25 via 5. An air cylinder 36 is further attached to the bracket 35. The lower end of the support rod 33 extends downward through the air cylinder 36. The air cylinder 36 is configured to constantly urge the support rod 33 upward by an air processing mechanism (not shown). A pin 37 extending in the left-right direction in FIG. 2 is attached to the lower end of the support rod 33.

In FIG. 1, a rail member 40 is attached to the left end of the common rod 21. Rail member 4
A rack 41 extending in the longitudinal direction is formed in the vertically intermediate portion of the rack 0. The rail member 40 includes
The gripping member 42 is connected by the same structure as the rail member 30 side, and the rail member 40 is connected to the gripping member 4
2, it is slidable only in the longitudinal direction. A pinion 43 having a center line in the vertical direction is disposed within the gripping member 42, and the pinion 43
is meshed with Rack 41. The pinion 43 is
It is fixed to the upper end of a support rod 44 arranged in the vertical direction. Further, an outward flange 45 is formed at the upper end of the support rod 44. A gripping member 42 is mounted above the flange 45 so as to be rotatable relative to the support rod 44. A vertically intermediate portion of the support rod 44 is rotatably supported by a guide cylinder 46. The lower end of the guide cylinder 46 is fixed to a bracket 51 screwed to the press device 25.

A reduction gear 49 is arranged below the guide cylinder 46. A servo motor 50 is attached to the lower end of the reduction gear 49. An output shaft (not shown) of the servo motor 50 is connected to a reduction gear 49 , and an output shaft (not shown) of the reduction gear 49 is connected to the lower end of the support rod 44 . Thereby, when the servo motor 50 is driven, the support rod 44 is rotated via the reduction gear 49.

An air cylinder 5 is attached to the lower end of the bracket 51.
2 is installed. The output rod 53 of the air cylinder 52 protrudes upward from the air cylinder 52, and a pin 54 extending perpendicular to the plane of FIG. 1 is attached to its tip. The pin 54 has a link plate 55 extending in the vertical direction.
The lower end of is fixed. Link plate 55
The upper end portion of is fixed to the casing of the reduction gear 49. This allows the air cylinder 52 to drive the support rod 44 in the vertical direction.

Furthermore, a link arm 5 formed in a dogleg shape
6 is rotatably attached to the bracket 51 via a pin 57 extending perpendicular to the plane of the paper. A bifurcated portion formed at one end of the link arm 56 is connected to the pin 5.
As a result, when the pin 54 moves up and down, the link arm 56 rotates around the pin 57. One end of a link rod 58 extending generally horizontally is connected to the other end of the link arm 56 so as to be rotatable about a center line perpendicular to the plane of the drawing. The link rod 58 has a screw mechanism at both ends thereof for adjusting the length. The other end of the link rod 58 is connected to the bracket 3.
The link arm 59 is connected to the lower end of a link arm 59 arranged on the 5 side so as to be rotatable around a center line perpendicular to the plane of the paper. The link arm 59 is a dogleg-shaped member, the center of which is a pin 6 extending perpendicular to the paper surface.
0, and is rotatably attached to the bracket 35. A bifurcated portion formed at the other end of the link arm 59 engages with the pin 37, so that when the link arm 59 rotates, the support rod 33 is driven in the vertical direction. There is.

Next, the operation of this embodiment will be explained.

First, a workpiece is held on the lower surface of the chuck portion 29 of the feed rod 22 located at the left end in FIG. 1 by a suction device (not shown). Next, the servo motor 50 is driven and the pinion 43 rotates, thereby moving the common rod 21 in the X direction. When the feed rod 22 is placed above the center of the mold 27, the movement of the common rod 21 by the servo motor 50 is stopped. Next, the air cylinder 52 is activated,
Move the output rod 53 downward. This causes the support rod 44 to move downward. at the same time,
The support rod 33 also moves downward via the link arm 56, link rod 58, and link arm 59 while resisting the upward bias from the air cylinder 36. As a result, the common rod 21 is translated downward, and the chuck portion 29 of the feed rod 22 is lowered to the position of the imaginary line 29a, as shown in FIG. In this state, the adsorption of the workpiece by the chuck portion 29 is released, and the workpiece is placed on the lower mold 27.

Next, the common rod 21 is moved upward by the operation of the air cylinder 52, and the chuck portion 29 is moved upward accordingly. Furthermore, the common rod 21 is returned to the position shown in FIG. 1 by the operation of the servo motor 50. Next, the press device 25 is operated to lower the upper die 28 and place it on the lower die 27, and press work is performed. When the press working is finished, the upper mold 28 is placed upward again.

Subsequently, the common rod 21 is moved in the reverse X direction by the drive of the servo motor 50, and the feed rod 22 is placed above the center of the lower mold 27 from the right side in FIG. In this state, the chuck portion 29 is placed at the position of the imaginary line 29a by the operation of the air cylinder 52. Then, the workpiece placed in the lower mold 27 is sucked and held by the chuck portion 29.
Next, the feed rod 2 is moved by the operation of the air cylinder 52.
2 moves upward, and the workpiece is taken out from the lower mold 27. Furthermore, the common rod 21 is moved in the X direction by the drive of the servo motor 50, and the next lower mold 27
A feed rod 22 is placed on the central part of. Then, by operating the air cylinder 52, the feed rod 2
The second chuck portion 29 is placed at the position of the imaginary line 29a, and the workpiece is placed on the next lower mold 27 by canceling the suction operation of the suction device (not shown).

Further, by driving the air cylinder 52, the feeding rod 22 is placed upward, and by driving the servo motor 50, the feeding rod 22 is placed above the space between the lower molds 22 as shown in FIG. Ru. Then, the upper die 28 is lowered again by the press device 25 to perform the next press process.

By performing the above operations continuously, pressing is performed one after another, and after performing the pressing four times, the processed workpiece is taken out from the right end in FIG.

To replace the molds 27 and 28, proceed as follows.

First, by operating the press device 25, the upper mold 2
8 is placed on the lower mold 27. On the other hand, common rod 21
is placed at the highest position as shown in FIG. In this state, the height of the common rod 21 (height b in FIG. 2) is higher than the height of the upper end surface of the upper mold 28 (height a in FIG. 2). Further, the feed rod 22 is arranged between the molds 27 and 28. Further, the support rods 33, 44 and the guide cylinders 34, 46 are arranged further outward in the left-right direction in FIG. 1 than the positions of the molds 27, 28. As a result, the stacked molds 27 and 28 are pulled out toward the front in the paper of FIG. 1 without being disturbed by the workpiece conveyance device. And new mold 2
7 and 28 are arranged in the work space 26 of the press device 25 without being obstructed by the workpiece conveyance device.

On the other hand, as shown in FIG. 2, this workpiece conveyance device is not arranged within the work space 26 of the press device 25, so there is no need to specially secure a space for the workpiece conveyance device within the work space 26. do not have. Therefore, the press device 25 can be made smaller, or larger molds 27 and 28 can be used.

[Effects of the Invention] As described above, the workpiece conveying device according to the present invention includes a common rod that can be placed at a position higher than the upper end of the upper mold when exchanging the upper and lower molds, and a common rod that can be placed at a position higher than the upper end of the upper mold when exchanging the upper and lower molds, and a workpiece conveying device when exchanging the upper and lower molds. A feeding rod located in the space between adjacent molds along the conveyance direction, a common rod support member placed in a position that avoids the mold movement path when exchanging upper and lower molds, and a common rod supporting the common rod along its longitudinal direction. Since a common rod feeding mechanism is provided that reciprocates in the direction, the workpiece conveyance device does not get in the way when changing molds.
It becomes possible to quickly and easily replace the mold.

Further, since the workpiece conveyance device is not disposed within the working space of the press device, the working space 26 can be used more widely and effectively for the mold, and a larger mold can be used. Furthermore, since there is no need to specifically secure a space for the workpiece conveyance device within the work space, the press device can be made smaller accordingly.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention.
FIG. 2 is a right side view thereof. FIG. 3 is a plan view thereof. 4 and 5 are schematic right side views of different conventional examples, respectively. 21 is a common rod, 22 is a feeding rod, 23 is a common rod support member, 24 is a common rod feeding mechanism, 27 and 28 are molds, and X is a workpiece conveyance direction.

Claims (1)

[Scope of Claims] 1. A method comprising: a plurality of lower molds arranged at intervals along the workpiece conveyance direction; and a plurality of upper molds provided corresponding to the lower molds; A workpiece conveyance device for a press machine that performs press working in a step-by-step manner using a pair of upper and lower molds located at a common rod that extends along the conveyance direction and can be placed at a higher position than the upper end of the upper mold when exchanging the upper and lower molds; a base is attached to the common rod and extends from the common rod side to the mold side; a feed rod for holding the workpiece located in a space between adjacent molds along the workpiece conveyance direction when exchanging the upper and lower molds; and a common rod for supporting the common rod on the mold removal side;
and a common rod support member disposed at a position that avoids a mold movement path when exchanging upper and lower molds, and a common rod feeding mechanism that reciprocates the common rod in its longitudinal direction. Conveyance device.