JPH0116218B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic feeder for a workpiece, and more particularly, an automatic feeder for a workpiece that operates using the mold slide drive source of a press machine itself that processes the workpiece. Regarding equipment.

FIG. 1 is a schematic front view illustrating a conventional automatic feed device for a workpiece applied to a press processing device. The press processing device 10 consists of a press machine 11 and an automatic feed device 12, and includes a press machine (in this example, C
The mold press) 11 includes a C-shaped frame 13, a bolster 14, a lower mold 15, a slide 16, an upper mold 17,
It is composed of a motor (not shown), a rotating shaft 18, and the like. The rotating shaft 18 is rotated by the drive of the motor, and the slide 16 is rotated through a cam mechanism (not shown).
is reciprocated in the direction of arrow A in the figure to perform press working on the workpiece 19 on the lower die 15. The rotating shaft 18 and the cam mechanism constitute a slide power transmission mechanism that transmits the power of the motor to the slide 16. A rotating ring 20 is attached to the end of the rotating shaft 18 that protrudes from the upper part of the frame 13, and an eccentric pin 21 is installed at an eccentric position of the rotating ring 20, and the rotating ring 20 is integrated with the rotating shaft 18. Rotate.

On the other hand, the automatic feed device 12 moves a large number of flat workpieces 19 stacked in a workpiece mounting magazine (not shown) one by one from position a to position b. In other words, the pusher mechanism 22 pushes out the workpiece to the supply position, and the gripping member 23 sucks and holds the workpiece at position b, following the process of arrow B in the figure (position b - position C - position d), and the lower mold 1
5 (position c) and a transverse feed mechanism section 24 for positioning and placing the workpiece 19 on top of the workpiece 19 (position c). The automatic feed device 12 has a camshaft 26 rotatably supported by a frame 25 via a ball bearing (not shown), and this camshaft 26 is suspended horizontally on a horizontal plane (see FIG. 2). ). frame 2
One end of a lever 27 is fixed to the end of the camshaft 26 that protrudes outward from the camshaft 5, and one end of a longitudinal link member 28 is rotatably coupled to the other end with a pin 29. has been done. On the other hand, the other end of the link member 28 is rotatably connected to the eccentric pin 21 implanted in the rotating wheel 20 described above. Therefore, the rotational force of the rotary shaft 18 of the press machine 11 moves the link member 28 up and down, and swings the camshaft 26 alternately forward and backward within a predetermined angle range (within 180 degrees) as shown by arrow C in the figure. . Here, the rotating wheel 20 , the link member 28 , and the lever 27 constitute a power transmission mechanism for extracting a portion of power from a motor drive source within the press 11 and transmitting it to the camshaft 26 .

In this way, without the traditional separate drive source,
The automatic workpiece feed device uses the mold slide drive source of the press itself to automatically send the workpiece to the processing position. The pusher mechanism pushes the workpieces one by one to the supply position, ie, position b, and then the workpiece gripping member advances to position and place the workpiece in the processing position, ie, position d, and then retreats to return to the supply position. has been done. However, this conventional workpiece automatic feeding device can only reciprocate the workpiece gripping member in the lateral direction of the press machine for each press process, and is The disadvantage of this method is that the worker must take out the formed workpiece from the processing position each time the press processing process is completed, resulting in poor work efficiency, safety issues, and high labor costs. It was hot. Therefore, in order to solve various problems such as work inefficiency, danger, and labor costs in automatic feeding of workpieces, there is a need for a device that automatically takes out workpieces from the processing position. However, the number of workpiece gripping members provided on the slide bar is increased, and the workpiece gripping members are fed and raised and lowered at the supply position, processing position, and take-out position in the workpiece feeding direction to grip the workpiece. Alternatively, in order to release the workpiece, a mechanism must be provided in which the workpiece gripping members do not interfere with the slide of the press.

The present invention has been made in view of the above-mentioned drawbacks, and it is possible to automatically feed a workpiece to a supply position without any human intervention, without providing a dedicated and separate drive source, and from the supply position to a processing position. We have developed an automatic feeder for workpieces that improves the efficiency of pressing workpieces, performs the work safely, and saves labor by being able to feed the workpieces and transport them from the processing position to the take-out position. This is what we are trying to provide.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a perspective view showing an embodiment of the automatic feeding device of the present invention applied to a press working device. A number of workpiece gripping members 23 corresponding to the number of lower molds 15 are arranged in parallel, that is, in a lateral direction. When the slide 16 on which the upper mold 17 of the press machine 11 is mounted starts to descend by the motor drive source (not shown) of the press machine 11 in order to press the workpiece 19, the motor drive source simultaneously Rotating wheel 2
0, the third via link member 28 and lever 27
As shown in the figure, the cam shaft 26 is rotated in forward and reverse directions, and the pusher 40 in the pusher mechanism 22 is reciprocated in the arrangement direction of the lower mold 15 via the feed arm 36, as shown in FIG. The workpiece is pushed out from the workpiece mounting magazine, ie, position a, to the supply position b. The forward and reverse rotation of the camshaft 26 also causes the cross-feeding arm 49 to swing as shown in FIG. reciprocate in the direction of arrangement. As will be explained with reference to FIGS. 6 and 7, as the slider 16 of the press 11 descends, the striker 77 fixed to the slider 16 descends and strikes the striker holder 78, thereby causing the swing arm 70 swings and before the slide 16 reaches the workpiece 19, the holder 42, that is, the workpiece gripping member 23, is retreated in a direction perpendicular to the arrangement direction of the lower mold 15, and the workpiece gripping member 23 is moved back.
interference with the slide 16 is avoided, and press working by the slide 16 is enabled. Next, while the slide 16 of the press 11 is rising, the workpiece gripping member 23 is moved laterally as described above, and the lower die 15 is moved in the opposite direction to the arrow 81 in FIG. The pusher mechanism section 22 and the workpiece gripping member 23 have now returned to their original positions. One press process is completed above, and press forming is repeated in the same procedure thereafter. The processed and formed workpiece is sequentially moved to the lower mold 15 as shown by arrow 81.
and is pushed out to the take-out position in a direction perpendicular to . Thereafter, the processed workpiece is transported to the next processing position by a conveying means such as a belt conveyor (not shown) installed at this take-out position.

FIG. 3 shows an automatic feeding device 12 for a workpiece according to the present invention.
FIG. 2 is a schematic perspective view showing a driving force transmission mechanism installed in a frame 25 of the present invention. The rotary wheel 20 is rotated by the motor drive source of the press 11, and the camshaft 26 is rotated alternately in forward and reverse directions via the link member 28 and the lever 27. The camshaft 26 is a single swinging cam 3
It has 0. Cam surface 30 of the swing cam 30
Rollers 33a, 3 of levers 33, 34 fixed to one ends of driven shafts 31, 32 rotatably mounted horizontally on a frame 25 arranged in parallel with the camshaft 26 are shown in a.
4a are pressed together, and both rollers 33a, 34a
are arranged opposite to each other with the swing cam 30 in between.
Note that springs (not shown) are stretched at predetermined locations in order to press the rollers 33a, 34a against the swing cam 30. A feed arm 36 for the pusher mechanism 22 is provided approximately at the center of the camshaft 26 and is rotatable via a ball bearing 35, and a gear portion 36a formed around the periphery is integrally connected to the driven shaft 32. The roller 34a is meshed with the rotating gear 37, and as the camshaft 26 rotates in the forward and reverse directions in the directions of arrows C ₁ and C ₂ , the roller 34a is rotated.
Detects the change in the arrow of the driven shaft 32 due to this.
Due to the forward and reverse rotations in the D ₁ and D ₂ directions, the feed arm 36 is alternately rotated in the forward and reverse directions in the same manner as the camshaft 26 in the directions of the arrows E ₁ and E ₂ . The mechanical members shown in FIG. 3, except for the lever 27 and the link member 28, are arranged in the cam box 54 as shown in FIG.

FIG. 4 is a cutaway front view showing the pusher mechanism in this embodiment. The tip of the feed arm 36 is connected via a link 41 to one side of a pusher 40 having a roller 39 that rolls along the feed direction on the base 38 of the pusher mechanism 22.
The pusher 40 reciprocates on a horizontal plane in accordance with the above-described swinging motion of the arm 36. A stepped portion 40a is formed on the upper surface of the pusher 40, and each time the pusher 40 reciprocates, the lowermost workpiece among the workpieces 19 stacked in a workpiece mounting magazine (not shown) is removed. The workpiece is pushed on its side edge by the step 40a and is pushed out to the feeding position, or position b, as shown in FIG.

FIG. 5 is a cutaway front view showing the transverse feed mechanism section of the holder 42, that is, the workpiece gripping member, along the arrangement direction of the lower mold 15 in this embodiment. Holder 4
2 is provided at the upper part of the frame 25 between the pusher mechanism section 22 and the lower mold 15 of the press machine 11, and inside thereof there are a plurality of V Vs arranged in two rows above and below.
The grooved roller 42a holds the prismatic slide bar 43 in the feeding direction. Slide bar 4
3 is movable in the feed direction with respect to the holder 42, and a pair of workpiece gripping arms 44, 44, which are attached to the slide bar 43 at a distance, each have a workpiece gripping arm at the approximate tip end thereof. It has a member 23. The workpiece gripping member 23 may be of a magnetic suction type or a chuck type, but in this embodiment, a pair of vacuum suction pads of a vacuum suction type are used.

One end of a pair of <-shaped bending links 45, 45 is rotatably connected to the lower part of the holder 42, and the other end of these is rotatably connected to a straight link 46 with a pin. The bending link 45 is rotatable about a support shaft 45a. Further, one end of the straight link 46 is rotatably pin-coupled to the tip of a lever 47. Therefore, when the lever 47 is rotated counterclockwise in FIG.
The straight link 46 moves to the left, and the pair of bent links 45 are rotated clockwise around the support shaft 45a, whereby the holder 42 is lifted upward together with the slide bar 43, and then the lever 47
When the holder 42 is rotated clockwise, the holder 42 is lowered.

The driven shaft 31 to which the lever 47 is fixed rotates as the cam surface 30a of the swing cam 30 of the camshaft 26 changes, and the shape of the cam surface portion that is pressed against the roller 33a is as shown in FIG. 3 of the camshaft 26. When the driven shaft 31 rotates in the C ₁ and C ₂ directions, the arrows F 1 and F ₁ in FIG.
It is configured to rotate to _F2 . The lateral feed arm 4 of the slide bar 43 is attached to the other end of the camshaft 26 with a ball bearing 48 inserted therein.
9, the tip of which is rotatably connected to the slider 50 with a pin 49a. The slider 50 holds a protrusion 51a of a slide guide 60 fixed to one side of the holder 42 so as to be able to reciprocate in the vertical direction. On the other hand, the horizontal feed arm 49
One end of a connecting link 52 is rotatably coupled to the base of the link 52, and the other end is rotatably coupled to the tip of an arm 53 fixed to the other end of the driven shaft 32. . Therefore, the camshaft 26 is
When rotated in the directions of arrows C ₁ and C ₂ in the figure, the driven shaft 3
2 rotates in the directions of arrows D ₁ and D ₂ , and the lateral feed arm 49 rotates in the directions of arrows D 1 and D 2 via arm 53 and connection link 52 .
It swings in the G ₁ and G ₂ directions, is rotated around the camshaft 26, and the slide bar 43 is guided by the V-grooved roller 42a and fed laterally. Here, since the slider guide 60 and the slider 50 are interposed at the joint between the cross-feeding arm 49 and the slide bar 43 to relieve the influence of the vertical movement of the cross-feeding arm 49, the rotation of the camshaft 26, that is, the cross-feeding arm 49
Due to the swinging movement of the slide bar 43, smooth lateral movement without vertical displacement of the slide bar 43 can be realized.

FIG. 6 is a side view showing a retraction mechanism for the workpiece gripping member, that is, a holder retraction mechanism in this embodiment, and FIG. 7 is a partially enlarged top view of the retraction mechanism in FIG. 6. The striker holder 78 is attached to the bracket 7
It is fixed to a slider 60 that slides via a bearing 68 about a support shaft 65 in the slider 9 . This slider 60 is pressed downward by a coil spring 66, and at the same time is constantly pressed upward by an air cylinder 84 shown in FIG.
0 is normally balanced and held at the upper limit position within bracket 79. Air cylinder 84 is press machine 1
This is provided so that the workpiece gripping member 23 can be moved to the retreat position even if the first slide 16 does not descend. For example, when it is desired to retract the workpiece gripping member 23 to the retracted position for inspection, repair, etc., the upward pressure on the slider 60 is released by opening the air relief valve (not shown) of the air cylinder 84. The gripping member 23 can be moved backward. The air relief valve also operates when the slider 60 descends due to the impact from the striker 77. The tip of the link 67 is fitted into a groove 71 formed on the side surface of the slider 60 via a roller 69, and is operatively connected to the slider 60.

Now, when the slide 16 of the press 11 descends, the striker 77 also descends and strikes the striker holder 78. When the slider 60 descends due to this impact force, the link 67 swings, and the swing arm 70 is attached to a support shaft 73 fixed to a bracket 79.
The V-grooved roller 42a of the holder 42 is swinged in the direction of the arrow B using the
is moved to the left on the guide shaft 82 in FIG.
5. Move back to avoid it from above. Holder 42
is a slide bearing 68 having a slide presser plate 74
It slides on the guide shaft 82 via. As a result, the workpiece gripping member 23 retreats before the slide 16 with the upper mold 17 attached descends and comes into contact with the workpiece 19, allowing press processing to be performed without being hindered by the workpiece gripping mechanism. can be carried out.

The present invention is capable of automatically feeding a plurality of workpieces in the lateral direction at the same time using the drive source of the slide of a press machine, and that the workpiece gripping member is moved using the vertical movement of the slide of the press machine. It is possible to retreat from the processing position, and after the press forming process is completed, the workpieces are automatically sent to the take-out position one after another without the need for the worker to take them out, so it is safe and easy for the worker to use without bothering the worker. It is possible to achieve effects such as labor saving through reduction and automation of multiple subsequent steps.

[Brief explanation of drawings]

FIG. 1 is a schematic front view illustrating a conventional automatic feeder for a workpiece, FIG. 2 is a perspective view showing an embodiment of the automatic feeder for a workpiece according to the present invention, and FIG. 3 is a slider according to the present invention. FIG. 4 is a cutaway front view showing the pusher mechanism in this embodiment; FIG. 5 is a cutaway front view showing the lateral feed mechanism in this embodiment; FIG. is a side view showing the retraction mechanism of the workpiece gripping member in this embodiment,
7 is a partially enlarged top view showing the retraction mechanism of FIG. 6. FIG. 10: Press processing device, 11: Press machine, 1
2: Automatic feed device, 16: Slide, 18: Rotating shaft, 19: Workpiece, 20: Rotating ring, 22: Pusher mechanism section, 23: Workpiece gripping member, 24:
Transverse feed mechanism section, 26: cam shaft, 28: link member, 30: swing cam, 31, 32: driven shaft, 33
a, 34a: roller, 36: feed arm, 40:
Pusher, 42: Holder, 43: Slide bar, 49: Transverse feed arm, 50: Slider, 6
0: Slider guide, 70: Swing arm, 7
3: shaft, 77: striker, 78: striker holder, 82: guide shaft, 83: vacuum source, 84: air cylinder.

Claims (1)

[Claims] 1. One end is connected to the slide power transmission mechanism of the press main body or the slide, and the other end is connected to a camshaft provided in the automatic feeder main body of the workpiece, and the slide moves back and forth. a power transmission mechanism that rotates the camshaft alternately in forward and reverse directions, and a workpiece gripping member that responds to changes in one cam surface of a swing cam provided on the camshaft; a cam lever that responds to changes in the other cam surface of the rocking cam; and a cam lever that responds to changes in the other cam surface of the swing cam. a pusher mechanism unit that is linked to enable lateral movement of a pusher that feeds workpieces loaded on the automatic feeder main body for workpieces one by one to the processing position; and the other side of the swing cam. In an automatic feed device for a workpiece, the lifting mechanism includes a reciprocating and lateral movement mechanism that is linked to a cam lever that responds to changes in the cam surface and is linked to enable reciprocating and lateral movement of a slide bar held in a holder. The slide bar is equipped with a plurality of workpiece gripping members along the arrangement direction of the molds, and is capable of reciprocating and horizontal movement between a supply position, a processing position, and a take-out position along the feed direction of the workpiece. The power transmission mechanism is normally held in an equilibrium position by being pressed downward by a coil spring and upward by air pressure, and when the slide of the press descends, the power transmission mechanism is held in an equilibrium position. a slider that descends in response; a swing arm that swings via a link pivotally connected to the automatic workpiece feeder main body as the slider descends; and a link that connects the swing arm and the holder; ,
A workpiece characterized in that the workpiece is provided with a holder retraction mechanism comprising a guide shaft horizontally suspended on the holder to slide the holder from a processing position to a position where the holder is retracted and avoided in response to the swinging of the swing arm. Automatic feeder. 2. The reciprocating lateral movement mechanism includes a lateral feed arm fixed to the holder and swinging by the forward and reverse rotation of the camshaft, and a lateral movement arm fixed to one end of the holder in the vertical direction. slider guide and
One end is rotatably attached to the tip of the lateral feed arm, and the other end is connected via a slider that grips the slider guide so as to be slidable in the vertical direction, so that the lateral feed arm Claim 1, characterized in that the workpiece gripping member is horizontally reciprocated between a supply position, a processing position, and a take-out position without vertical displacement of a slide bar.
Automatic feeding device for workpieces as described in section.