JPH0328030Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a laminated frame pressing mechanism in a flake peeling and feeding device that peels and feeds a large number of laminated thin pieces of lead frames or the like one by one.

[Conventional technology]

A flake peeling/feeding device that applies weight to the laminated frame in the stocker without manual intervention, and reliably peels and feeds every last frame, was developed by the applicant in Utility Application No. 144012/1983. Disclosed.

[The problem that the idea attempts to solve]

The weight plate therein is fixed to the weight mounting plate in a horizontal state. Therefore, in that case, if the top surface of the laminated frame is horizontal, it will come into close contact with the entire surface and press each part equally, but if it is not horizontal, there will be some parts that do not come into close contact, and the pressure on those parts will be reduced. Because the pressure is weak, the effect of the weight plate, which is to press the laminated frame and reliably separate the frames one by one even when the remaining amount is low, cannot be fully demonstrated. There are drawbacks.

Therefore, the present invention is designed to make the weight plate rotatable so that it can always be in close contact with the top surface of the laminated frame, so that even when the remaining amount is low, the weight plate can be peeled off one by one without fail. The object of the present invention is to provide a laminated frame pressing mechanism in a peeling and feeding device.

[Means to solve the problem]

In the present invention, a pair of shafts 1 are installed on an upper plate 2 of a frame via a bracket 3, and a weight guide 6 is attached to the shaft 1 so as to be able to move up and down. Fixing plates 7 and 8 facing the fixed plates 7 and 8 are rotatably attached, and a straddling member 9 is fixed to the tips of the fixing plates 7 and 8,
The above-mentioned laminated frame pressing mechanism in a flake peeling and delivery device is characterized in that a vertically long weight plate 10 is rotatably supported in an eccentric state so that the straddling member 9 is straddled in the longitudinal direction. Solved the problem.

[Effect]

Since the weight plate 10 is rotatably supported in an eccentric state, it rotates in accordance with the inclination of the upper surface of the laminated frame, and reliably presses the laminated frame.

〔Example〕

The drawings show an embodiment of the present invention. In the drawings, reference numeral 1 denotes a shaft provided on an upper plate 2 of a pedestal via a bracket 3, and a stopper 4 is fixed to the upper end of the shaft. 5 is a weight stopper fixed to the stopper 4, and a stepped portion 5a is formed below the weight stopper. Reference numeral 6 denotes a weight guide fitted to the shaft 1 so as to be able to rise and fall freely.Fixing plates 7 and 8 are rotatably installed on this weight guide 6, and these fixed plates 7,
A straddling member 9 is fixed to the tip of the 8. Reference numeral 10 denotes a vertically elongated weight plate, on which a straddle member 9 is straddled in the longitudinal direction, and rotatably supported by a vertical plate 9a. In that case, the support shaft 9b that supports the weight plate 10 is arranged offset from the center of gravity of the weight plate 10 (see FIG. 3). By doing so, the weight plate 10 can be easily rotated and more securely comes into close contact with the upper surface of the laminated frame. 11 is a gripping ring installed on the straddling member 9. The gripping portion may be formed on the outer wall of the straddling member 9. Reference numeral 12 denotes a stocker for storing a laminated frame such as a laminated lead frame, which restrains the four corners of the laminated frame. 13 is a constant spring 1 along the column 14.
A slide guide 15 is passed between the guide plates 13, 13 by the guide plate pushed up by the guide plate 4a. Reference numeral 16 denotes a left lower chuck holder fitted so as to be slidable in the lateral direction with respect to the slide guide 15, and a cam follower 1 for the left lower chuck cam (not shown) fixed to the cam shaft 17.
Install 8. Further, numeral 19 denotes a right lower chuck holder which is fitted to the slide guide 15 so as to be slidable laterally, and a cam follower 20 for a right lower chuck cam (not shown) is also installed in this. The left and right lower chuck holders 16 and 19 are always connected to the camshaft 17 by springs 15a wrapped around slide guides 15, respectively.
so that it is pressed in the direction (inward). Reference numeral 21 denotes a connector that connects the guide plates 13, 13, and a cam follower 22 that comes into contact with a lifting cam (not shown) for raising and lowering the guide plates 13, 13.
Set up. 23 and 24 are lower claw bases fixed on the left and right lower chuck holders 16 and 19, on which lower claws 25 and 26 are installed, respectively. The left and right lower chuck holders 16, 19 and the lower claw bases 23, 24 are arranged at two locations in the longitudinal direction of the weight plate 10, front and rear. 27 and 28 have approximately the same configuration as the lower claw bases 23 and 24 (however,
A slide guide corresponding to the slide guide 15 is fixed between the side walls of the pedestal. ), an upper claw base that slides laterally by the action of a cam, and upper claws 29 and 30 are also installed on these. A pusher 31 is moved in the longitudinal direction of the weight plate 10 by a cylinder, and pushes out the separated frame.

To explain the operation of the above structure, first, when storing the laminated frame in the stocker 12, the gripping ring 11 is gripped and the weight plate 10 is raised along the shaft 1, and then the weight plate 10 is raised at the rising end. is reversed, and the fixing plates 7 and 8 are placed on the stepped portion 5a of the stopper 5. After the weight plate 10 is taken out of the stocker 12 in this manner and the laminated frame is placed inside the stocker 12, the weight plate 10 is again rotated toward the stocker and placed on the laminated frame. Then, the weight plate 10 descends by its own weight along the shaft 1 via the weight guide 6, the fixed plates 7, 8, and the straddle member 9, so that it continues to press the laminated frame from above. In that case, the weight plate 10 is rotatably supported eccentrically on the vertical plate 9a of the straddling member 9, so that even if the upper surface of the laminated frame is not horizontal, the weight plate 10 is Rotates according to the inclination of the Therefore, weight plate 1
0 always comes into close contact with the upper surface of the laminated frame and presses the entire surface thereof. Next, to explain the peeling and conveying action, when a peeling signal is input, the lower chuck holders 16 and 19 first move the spring 1 due to the working relationship between the elevating cam and the cam follower 22.
4a (FIG. 4b), the upper chuck opens due to the relationship between the upper chuck cam and the cam follower, and the entire frame rests on the lower claw bases 23 and 24 (FIG. 4 c). Next, lower chuck cam and cam follower 18,2
0, the lower chuck holders 16 and 19 are closed (closed) by the action of the spring 15a,
At this time, the lower claws 25 and 26 interpose between the bottom frame and the frame above it, and check only the bottom frame (FIG. 4d). At this time, even if the remaining amount of the laminated frame becomes small, the entire surface is pressurized from above by the weight plate 10, and it is kept in close contact with the lower claw bases 23 and 24 without partially lifting up. The lower claws 25, 26 are always accurately inserted between the bottom frame and the frame above it, so that only the bottom frame is reliably peeled off and chucked. Furthermore, the upper chuck comes to close, and the upper claw goes under the second frame from the bottom, and then checks the upper frame (Fig. 4e). Then, due to the relationship between the elevating cam and the cam follower 22, the lower chuck holders 16 and 19 are lowered (the fourth
In FIG. Subsequently, the lower chuck opens, and the separated frame becomes free on the lower claw bases 23, 24 (FIG. 4g). In this state, the pusher 31 moves forward under the action of the cylinder and pushes out the separated sheet.

[Effect of idea]

The present invention is as described above, and since the entire surface of the laminated frame is constantly appropriately pressurized by the weight plate, the laminated frame will not partially lift up, and the remaining amount of the frame will be reduced. too,
This has the effect of ensuring that the frames are peeled off one by one and sent out.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a diagram showing the position of the support shaft with respect to the weight plate, and FIG. 4 is an explanatory diagram showing the chucking operation. Explanation of symbols, 1... Shaft, 6... Weight guide, 7, 8... Fixed plate, 9... Straddling member, 9
a...Vertical plate, 9b...Support shaft, 10...Weight plate, 12...Stocker.

Claims (1)

[Scope of utility model registration request] One shaft 1 is installed on the upper plate 2 of the frame via a bracket 3, and this shaft 1
A weight guide 6 is attached so that it can be raised and lowered freely, fixing plates 7 and 8 whose tips face inside the stocker 12 are rotatably attached to the weight guide 6, and a straddling member 9 is fixed to the tips of the fixing plates 7 and 8. A laminated frame pressing mechanism in a flake peeling and delivering device characterized in that a vertically long weight plate 10 is rotatably supported in an eccentric state so that the straddling member 9 is straddled in the longitudinal direction.