JPS5853900A - Work feeding mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a work transfer mechanism for transferring semiconductors such as DIP type and FP type at regular intervals. We provide a workpiece transfer mechanism that reliably and efficiently arranges and transfers workpieces at intervals of feet.

In the present invention, a pair of glue 2 pump members with several protruding workpiece feed claws are placed oppositely across a guardrail, and both members can be opened and closed regularly by a cam arranged on a camshaft driven by a stepping motor. In addition, the work transfer mechanism is characterized in that one or both of them can be moved back and forth by a cam, and FIG. 5 shows an embodiment of the mechanism for transferring DIP type semiconductors. In the figure, reference numeral 1 denotes a short clamp member, on which several feed claws 2 are protruded, and a contact piece 3 made of silver-tungsten or the like is also protruded. Numeral 4 is a long clamp member, which, like clamp member L, has a feed claw 5 and a connecting member.
Set up a contact piece 6V*. 5 This contact piece 6 and the above contact piece 3 are
By contacting the side surface of the transferred workpiece W at the same time, electricity is supplied from K, thereby confirming the presence and passage of the workpiece. Clamp member l and clamp member 4
is the guide rail 7 over which the workpiece W moves astride.
Place them between the two. A heater for preheating is housed within the guide rail 7. Reference numeral 8 denotes a pivot frame, which is configured to be rotatable about a pivot 9t extending from front to back, and a clamp member 1 is fixed thereon. Reference numeral 10 denotes a force link fixed to the pivoting frame 8, which is constantly pressed against the plate cam IIK for pivoting drive via a spring (not shown). Board cam 1
1 is fixed to a camshaft 12 which is passed back and forth in the same manner as the pivot 9 and is driven by a motor. 13 is a pivot frame, pivot 9'4
It is made rotatable at t@, and the crank member 4 is fixed thereon. Reference numeral 14 denotes a transmission member fixed to the lower end of the pivot frame 13, which is constantly pressed down by a spring (not shown) and brought into contact with the °C push-up member 15.

The push-up member 15 is fixed to the tip of a pivot arm 16 provided with a cam 7 lower 17 that presses against a plate cam 18 fixed to the camshaft 12. Reference numeral 19 denotes an end cam for driving the slide, which is fixed to the camshaft 12. A pivot bar is provided with a cam 7 follower 21 that follows the end cam 19 in the middle, and is rotatable about a pivot 20.

The tip of the pivoting bar is engaged with the pivoting frame 13, and as the pivoting bar is rotated, the pivoting frame 13 can be moved a certain distance (leftward in FIG. 2). . When the pivot bar is returned to its original position, the pivot frame 13 is also pulled by a spring (not shown) #IC to return to its original position. n is a work stopper, which is rotatable via the rotation axis n, and placed in a position where its tip can come into contact with the work being fed. A cam follower %%25 is fixed to it.The cam follower %%5 is brought into contact with an end face cam for driving a work stopper which is fixed to the camshaft 12 at all times via a spring (not shown).This work stopper ρ is used to hold the incoming workpiece and place the workpiece in a predetermined position. 627 is a workpiece holder, which is moved up and down by the plate cam 28 fixed to the camshaft 12. (See Figure 7). 4 is a vertically movable lifting rod, 30 is a cam follower that engages with the plate cam 2BK, and a connecting member 31t.
It is fixed to the lifting rod 29 through the l-. This work clamp 4
As will be described later, K is for holding the workpiece t on the guide rail 7 when the clamp member 1.4 is opened and the crank member 4 is moved backward. The wing is a stepping motor for intermittently driving the camshaft 12 to rotate, and A is a sensor that senses the - (B) rotation of the camshaft 12 and controls the rotation of the stepping motor wing. A is the outer plate of the device, A is the inner plate, and A is the pivot arm 16-fixing member. FIG. 8 shows a part of the supply mechanism which is a pre-stage of this mechanism, and 37 is a pusher for pushing the work Wt onto the guide rail 7. In addition, in the case of the PP type, each clamp member is closed at the same time to move forward, and opened and moved back. In the state 11 in which the clamp member 1.4 is opened by the action of the cam 11 and the plate cam 1B, the pusher of the supply section is activated to feed the workpiece W onto the guide rail 7. In this case, the clamping member 4 is moved rearward (to the left in FIGS. 1 and 2) via the pivot bar area by the action of the end cam 190. Next, as the stepping motor rotates, the cam 7 roller 17, which imitates the plate cam 18IC, lowers the push-up member 15, and the pivot frame 13 is pulled by the spring. The clamp part heather 4 is closed. At the same time, cam 7 o stomach a 21.

When it reaches the valley of the attached end cam 19, the application of the pivot bar returns, and the pivot frame 13 is also biased by the spring and torsioned to its original position (solid line in FIG. 2). Accordingly, the workpiece W on the guide rail 7 is also pushed one pitch at a time by each feed claw 2 of the clamp member 4, and the clamp part #l is closed by the action #CJ of the plate cam 1. At this point, the workpiece W comes into contact with the contact piece 3.6 while being restrained by the workpiece stopper 22, and the current is applied to the contact piece 3.6 (a pass signal is sent).
The clamp members 1 and 4 are opened again by the action of 8, and the clamp member 4 is retracted by the action of the end cam 19.
At this time, the workpiece holder I is lowered by the action of the plate cam stage via the elevating rod, and the workpiece W is held onto the guide rail 7 to prevent its movement. Thereafter, the above-described steps are repeated, and the work Wt is continuously transferred. In the case of the FP type, each gangway member closes and moves forward, and moves back in an open state, and the workpiece is transferred by repeating this operation.

The present invention is as described above, and the effect of the several cams disposed on the shaft ensures efficient transfer of the workpiece on the guide rail.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a front view thereof, and FIGS. 3 to 7 are views showing the action of the cam, respectively.
FIG. 8 is a diagram showing a mechanism section which is a pre-stage of the mechanism section according to the present invention 8AK. Explanation of symbols 1... Clamp member, 2... Feed claw, 3... Contact piece, 4... Clamp member, 5... Feed claw, 6...
Contact piece, 7... Guide rail, 8... Pivoting frame, 9... Pivot, 11 River plate cam, 12... Cam shaft,
13... Pivoting frame, 16... Pivoting arm, 18
- Plate cam, 19... End cam, Add... Pivoting bar, B... Work stopper, End cam, I... Work holder, 28... Plate cam, 32... stembing motor

Claims (5)

[Claims] (1) A pair of clamp members with several protruding workpiece feed claws are used to sandwich the guardrail, and both members can be opened and closed regularly by a cam placed on a camshaft driven by a stepping motor [Jf]. A workpiece transfer mechanism is characterized in that it can be moved back and forth by means of a trap and a T-cam on both sides. (2) One of the pair of clamp members is made longer than the other,
The long clamp member is driven by a cam to move the long clamp member backward in an open state when the short clamp member is open, and to advance in the closed state when the short clamp member is closed. A workpiece transfer mechanism according to claim 1. (3) By providing a contact piece on each clamp member and energizing it when the workpiece passes, it is possible to detect the presence and passage of the workpiece. The workpiece transfer mechanism described in Section 2. (4) A work stopper for regulating the workpiece position operated by a cam fixed to the camshaft, which is disposed at a position where it can come into contact with the workpiece. The described workpiece transfer device. (5) The workpiece according to claims 1, 2, 3, w, and 4, wherein a cam IIcJ-9 fixed to the camshaft is provided with a workpiece presser that moves up and down to press the workpiece onto the guide rail. Transfer device.