JPS58187225A - Automatic feed device of object to be worked - Google Patents

Abstract

PURPOSE:To obtain an automatic feed device capable of feeding an object to be worked to a press machine by prescribed sequence, by utilizing the power of the press machine body for supplying the object to be worked, without providing an exclusive driving source. CONSTITUTION:This automatic feed device has a holding member 23 for the object to be worked, and has a striver 43 which is capable of reciprocating lateral movement between two positions (c), (d) running along the feed direction of an object 19 to be worked. Also, it has a holder which holds the striver 43 so as to move laterally and is capable of ascending and descending in the upper and lower directions, and a power transfer mechanism which is connected to a slide 16 of a press machine body 11, operates by synchronizing with its reciprocating motion and turns a cam shaft 26 alternately in the forward and backward directions. Also, it has a cam provided on the shaft 26 and each cam mechanism for lateral movement and ascending and descending, which responds to a variation of the cam face. Moreover, it is provided with a displacement transfer mechanism for transferring an operation of said each cam mechanism to the corresponding striver 43 and its holder 42.

Description

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

Conventionally, as this type of automatic feeding device, there is one in which two-dimensional movement of a workpiece gripping member, such as reciprocating movement between three lateral positions and lifting and lowering, is realized by the power of a single motor. However, this device has its own drive members such as a motor and a pneumatic cylinder internally, so there is a problem in that the device itself inevitably becomes larger. For those with a built-in motor, it is necessary to convert the rotational movement of the motor main shaft into horizontal and vertical reciprocating movement of the gripping member, so two clutches are installed in the motor power transmission path, one for lateral movement and one for lifting/lowering. A mechanism is involved, and the lateral movement and elevation are controlled by the on/off operation of each clutch mechanism. Therefore, there are disadvantages in that the configuration is complicated, timing control is troublesome, and failures are likely to occur. On the other hand, models with built-in pneumatic cylinders have the disadvantage that it is difficult to control switching from lateral movement to elevation or vice versa, and a large number of expensive control parts are required to perform accurate two-dimensional movement. .

The present invention addresses the above-mentioned problems and drawbacks, and effectively utilizes the power of the press body to which the workpieces are supplied, without providing a dedicated drive source, to move the workpieces in a predetermined sequence. The object of the present invention is to provide an automatic feeding device capable of feeding a press machine with a press machine.

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

FIG. 1 is a schematic front view of a press processing apparatus to which an automatic feeder of the present invention is applied. The press processing device 10 consists of a press machine 11 and an automatic feeder 12, and the press machine (C-type press) 11 includes a C-type frame 13, a bolster 14, a lower mold 15, a slide 16, an upper mold 17, and a motor ( (not shown), a rotating shaft 18, etc. By driving the motor, r? The J rotating shaft 18 rotates, and the slide 16 is moved forward and backward in the direction of arrow A in the figure via a cam mechanism (not shown) to press the workpiece 19 on the lower die 15. Ru. The rotating shaft 18 and the cam #&false constitute a slide power transmission mechanism that transmits the power of the motor to the slider 16.

A rotating ring 20 is attached to the end of the rotating shaft 18 protruding from the upper part of the frame 13, and an eccentric pin 2 is attached to the eccentric position of the rotating ring 20.
1 is implanted, and the rotating wheel 20 rotates integrally with the rotating shaft 19.

On the other hand, the automatic feeding device 12 has a pusher mechanism $ that pushes out a large number of flat workpieces 19 stacked in a magazine (not shown) from position a to the lowest workpiece one by one. 22 and the workpiece at position bK is suctioned and held by the gripping member 23, and the workpiece is placed on the lower mold 15 (position C) following the process of arrow B in the figure (position C - position d). ] It is generally constituted by a transverse feed mechanism section 24 = I for positioning and placing 9.

The automatic feed device fi12 has a camshaft 26 rotatably supported on a frame 25 via a pole bearing (not shown).
, and this camshaft 26 is suspended on a horizontal plane (
(See Figure 2). One end of a lever 27 is fixed to the end of a camshaft 26 that protrudes outside from the frame 25, and one end of a longitudinal link member 28 is fixed to the other end of a pin 27.
9, they are rotatably connected. On the other hand, the other end of the link member 28 is attached to the rotating wheel 20 described above at 41! It is rotatably connected to an eccentric bin 21 provided therein. Therefore, the rotational force of the rotating shaft 18 of the press machine 110 causes the link member 28 to move up and down, causing the cam shaft 26 to rotate (swing) within a predetermined angle range (within 180 degrees) in forward and reverse directions, as shown by arrow C in the figure. move) Here, the co-rotating wheel 20, the link member 28, the lever 2
Reference numeral 7 constitutes a power transmission unit for extracting a portion of power from a motor drive source within the press machine 11 and transmitting it to the camshaft 26.

FIG. 2 is a perspective view schematically showing a mechanism installed in the frame of the automatic feeder f1112. The camshaft 26 has a single swing cam 30, and this cam rkJ3OaK is connected to a driven shaft 31. Lever 3 fixed to one end of (32)
The rollers 33a and (34m) of No. 3 and (34) are in pressure contact with each other, and both rollers 33a and 34m are arranged to face each other with the swing cam 30 in between. In order to press the rollers j3m and a4m against the swing cam 30, springs (not shown) are stretched at predetermined locations.

At approximately the center of the camshaft 26, there is a feed arm 3 for the button shear mechanism 22 which is rotatable via a ball bearing 35.
6 is provided, and a gear portion 36a formed around the circumference meshes with a gear 37 that rotates integrally with the driven shaft 32.
Arrow C of camshaft 26! , Ct As the force direction alternately rotates in the forward and reverse directions, the roller 34a detects changes in the cam surface 30 & of the swing cam 30, thereby causing the driven shaft 32 to rotate as shown in the arrow, , D
By rotating the feed arm 36 alternately in the forward and reverse directions, the feed arm 36, like the camshaft 26, is alternately rotated in the directions of the arrows E, , and E.

As shown in FIG. 3, 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 moves along the feed direction on the base 38 of the pusher mechanism section 22. The pusher 40 is configured to reciprocate on a horizontal plane as the arm 36 swings. A stepped portion 40B is formed on the upper surface of the pusher 40, and each time the pusher 40 reciprocates, the lowest one of the plate-shaped workpieces 19 stacked in the magazine (not shown) is removed. The 70 side end portion is pushed by the stepped portion 40a, and the workpiece 19 is successively pushed out to position @b as shown in FIG.

On the other hand, between the pusher mechanism section 22 and the lower metal amount 15 of the press machine 1lf, there is a holder 4 located on the upper part of the frame 25.
2, and inside thereof, a plurality of grooved rollers 42a in two rows above and below hold a prismatic slide par 43 in the feeding direction. It is said that it is possible to move to Further, the slide par 43 has a gripping member 23 approximately at the tip of the arm 44 . This gripping member may be of a magnetic suction type or a chuck type, but in this embodiment, a pair of vacuum suction type bats are used.

A pair of dogleg-shaped bending links 4 are provided at the bottom of the holder 42.
5 is rotatably pin-coupled to the straight link 46, and the bent link 45 is rotatable about the support shaft 45a. There is. Further, one end of the straight link 46 is rotatably pin-coupled to the tip of a lever 47 fixed to the other end of the driven shaft 31. Therefore, when the lever 47 is rotated counterclockwise in FIG. 4, the straight link 46 is moved to the left, and the pair of bent links 45 are rotated clockwise around the support shaft 45a. As a result, the slide par 43
The holder 42 is lifted upward integrally with this, and then, when the lever 47 is rotated clockwise, the holder 42 is lowered.

The driven shaft 31 having the lever 47 rotates as the cam surface 30M of the swing cam 30 of the camshaft 26 changes, and
The shape of the cam surface portion 3a that comes into pressure contact with the third
It is configured to rotate in directions C, , C in the figure.

At the other end of the camshaft 26 is a cross-feeding arm 49 of a slider 43 attached via a ball bearing 48, the tip of which is coupled to a slider 50 so as to be rotatable once with a pin 49a. The slider 50 is fitted into a groove 51a of a guide frame 51 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 4
One end of the connecting link 52 is rotatably coupled to the base 90, 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, when the camshaft 26 is rotated in the directions of arrows C, , C in FIG. 43 is guided by a V-grooved roller 42a as shown by arrows H, , H in FIG.

The object is fed horizontally in the direction. Here, a guide frame 51 and a slider 50 are provided at the joint between the transverse arm 49 and the slider 43.
Since the vertical movement of the arm 49 is relieved by intervening, smooth lateral movement without vertical displacement of the slide par 43 can be realized.

The mechanical parts shown in FIG. 2 are arranged in the cam box 54 as shown in FIG. 3.

In this way, by providing a power transmission mechanism that is linked to the slide power transmission mechanism of the press body, operated in synchronization with the reciprocating movement of the slide 16, and rotates the camshaft 26 in forward and reverse directions, Even if a drive source such as a motor is provided in the automatic feeding device 111, the two-dimensional movement of the gripping member 230 for the workpiece can be performed without any trouble, and an automatic feeding device that is compact, simple in configuration, and highly reliable is provided. It is possible. In the above embodiment, the power transmission mechanism is constructed using the rotary wheel 20, the longitudinal link 28, etc., but a pinion is provided on the camshaft 26, a rack is fixed to the slide 16, and the two are connected. By using an interlocking configuration, it is possible to realize a power transmission@& barrel with a simpler configuration.

Furthermore, in the invention, the camshaft 26 is y180
Since it is configured to be rotated alternately in forward and reverse directions within 30°, two cams, one for feeding and one for raising and lowering, are used to detect the displacement of the cam surface 30a of the single swing cam 30. roller 33
By arranging a and 34a facing each other, it becomes possible to have a -iJ function, which has the advantage that the configuration is simpler.

υ, Above, the structure is simple and the Sappho incorporates one force from the slide power transmission mechanism of the press body.
Therefore, the gripping member 23 of the automatic feeder can be operated two-dimensionally with good timing in relation to the reciprocating movement of the slide, and there is an advantage that high-speed feeding of the workpiece can be realized.

In addition, since the configuration is such that a pusher mechanism is actuated to carry the workpiece to the side (fib) of the over-bolster 15 in accordance with the forward and reverse rotation of the camshaft 26, the pusher mechanism is provided. However, it has the advantage of easy production and release, and the ability to feed the workpiece in the lateral direction.1.・It has the effect of allowing the work to be done in a timely manner. still,
It goes without saying that a transverse feed mechanism such as a belt conveyor or the like operated by rotation of a camshaft may be employed as a mechanism for once conveying the workpiece to the bolster Q)V'.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of an embodiment of an automatic feeder for a workpiece according to the present invention, Fig. 2 is a perspective view schematically showing its internal mechanism, and Fig. 3 is a pusher mechanism section in this embodiment. FIG. 4 is a cutaway front view showing the cross-feeding mechanism section in this embodiment, and FIG. 5 is a cutaway front view of the automatic feeding device of this embodiment. 10--Press processing device, 11--Fist press machine, 12
e...Automatic feeding device, 16...Slide, 18...
Rotating shaft, 19--Workpiece, 20-Rotating wheel, 22
... pusher mechanism section, 23 ... - gripping member, 24.
...Transverse feed mechanism section, 26--Cam shaft, 28... Link member, 30... Exposure rocking cam, 30a... Cam surface, 3
1, 32...driven shaft, 33 a t 34 B @-
・Roller, 36...Feed arm for pusher mechanism section, 40...Pusher, 42@...Holder, 43...
・Slide par, 49.e. Cross feed arm for the cross feed mechanism.

Claims (4)

[Claims] (1) A slide bar that has a workpiece gripping member and is capable of horizontally reciprocating between three positions along the feed direction of the workpiece; A holder capable of raising and lowering BJ and a slide power transmission mechanism of the press body or a power transmission mechanism that is connected to the slide and operates in synchronization with the reciprocating movement of the slide to alternately rotate the camshaft in forward and reverse directions. , cam mechanisms for lateral movement and elevation that respond to changes in the cam surface of the cam provided on the cam shaft, and displacement transmission that transmits the movement of each cam mechanism to the corresponding slide bar and the holder. Automatic feeding device for workpieces consisting of a mechanism. (2) Each of the cams for forward self-movement and for lifting/lowering has a roller that presses against the cam surface and detects its change, and both rollers are arranged opposite to a single cam. % as composition! l! f. An automatic feeder for a workpiece according to claim (1). (3) a slide bar having a workpiece gripping member and capable of horizontally reciprocating between first and second positions along the feed direction of the workpiece, and holding the slide bar so as to be horizontally movable; ,
A holder that can be raised and lowered in the vertical direction, a transverse feed mechanism that transports the workpiece to the first position f, and a slide power transmission mechanism of the press body or linked to the slide, and the slide Along with a power transmission mechanism that operates in synchronization with the reciprocating motion and rotates the camshaft in forward and reverse directions alternately, and cam mechanisms for lateral movement and elevation that respond to changes in the cam surface of the cam provided on the camshaft. An automatic workpiece feed device comprising a displacement transmission mechanism that operates the lateral feed mechanism by rotation of the camshaft itself. (4) Each of the cam mechanisms for lateral movement and elevation has a roller that presses the cam surface and detects a change in the cam surface, and both rollers are arranged opposite to a single cam. An automatic feeder for a workpiece according to claim (3).