JPS6219631Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a feeding device for perforated plates.

Conventionally, as a method for supplying perforated boards such as printed wiring boards that have a large number of small holes one by one from a stacked state, there have been methods such as extrusion method in which the boards are pushed out one by one, or vacuum suction method in which the boards are sucked and supplied using a vacuum suction cup. We are taking measures to However, the former extrusion method has the problem of causing minute scratches on the surface because the perforated plates rub against each other, and it could not be applied to plates that do not like these scratches.

On the other hand, the latter vacuum suction cup method has the disadvantage that the second perforated plate is stacked together and suctioned because it has a through hole. For this reason, a plurality of small vacuum suction cups are provided, and a position on the plate with no holes is selected and the contact point of the small vacuum suction cup is aligned with that position.
Therefore, in the case of high-mix, low-volume production, the frequency of adjustment increases and there is no advantage of automation.

An object of the present invention is to provide a perforated plate feeding device that eliminates such conventional drawbacks.

According to the present invention, there is provided a vacuum suction holder in which a holding plate of a vacuum suction cup connected to an exhaust means is moved up and down and back and forth by means of a spring, and a blocking surface of the vacuum suction cup holder is lower than the suction surface of the suction cup when the vacuum suction cup holder is raised. A perforated plate feeding device is obtained, which is characterized by being equipped with a rise prevention vertical mechanism.

Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a piping diagram of a vacuum system, and FIGS. 3 a, b, c, and d are side views showing the suction operation of the suction unit of the present invention. This example is applied to a continuous handling device that continuously supplies printed wiring boards (hereinafter referred to as boards) after holes are stacked on a table to a board processing machine. Consists of a suction cup part and an elevating table part. The suction cup 1 is connected to a vacuum pump 2 as an exhaust means by a flexible hose 5 with a solenoid valve 3 and a pressure detector 4, which are omitted for simplicity in FIG. A large number of them are randomly suspended by springs 8 attached to a suction cup head 7 which serves as a holding plate. Note that the upper and lower cylinders 6 and their shafts 6a constitute a mechanism for raising and lowering the suction head 7.

The mounting plate 9 of the vertical cylinder 6 is attached with a stopper cylinder 11 that moves up and down a lift stopper 10 that prevents it from rising above a specified level, and is connected to a forward and backward movement cylinder 12 that moves back and forth left and right as shown by the arrows in FIG. has been done. The lifting table 14 on which the substrates 13 are loaded is moved by means of springs 15.
It moves up and down by the rotation of the motor 16.

Next, the operation of supplying the substrate 13 will be explained.

First, the substrates 13 are stacked on the lifting table 14, and by a starting operation, the motor 16 rotates, the screw 15 raises the lifting table 14, and the position level of the top layer of the substrates 13 is detected by the photo sensor A17. , and stop it at the specified position. The suction cup 1 is lowered by the drive of the upper and lower cylinders 6 and comes into contact with the substrate 13 on the lifting table 14. Sucker 1
When the suction cup 1 comes into contact with the substrate 13, the suction cup 1 is brought into a suction state by the action of the vacuum pump 2, and the suction cup head 7 starts to rise by driving the upper and lower cylinders 6. Board 1
3 are suctioned in two layers by the suction cup 1 as shown in FIG. 3a, as the suction cup head 7 rises, the substrate 13 hits the lift stopper 10 and the substrate 13 rises as shown in FIG. 3b. stopper 10
is prevented from rising.

However, as the suction cup head 7 rises further, the spring 8 connected to the suction cup 1 and the suction cup head 7 stretches, and a tension force is generated that tends to separate the suction cup 1 from the substrate 13. On the other hand, a suction cup lifting the second lower substrate 13 through the hole 18 of the upper substrate 13;
In other words, the suction force of the suction cup 21 that is in contact with the hole 18 is weaker than the suction force of the suction cup 1 that is not in contact with the hole 18 due to air leakage from the gap between the two overlapping substrates 13. Therefore, by selecting a spring 8 whose maximum tension is smaller than the suction force of the suction cup 1 that is not in contact with the hole 18 and larger than the suction force of the suction cup 21 that is in contact with the hole 18, the result shown in FIG. As shown in FIG.
The first substrate 13 falls onto the stacked substrates 13.

The detached suction cup 21 is detected by the pressure detector 4 (see Fig. 2) connected to the flexible hose 5.
It is detected that the solenoid valve 3 has come off, and the solenoid valve 3 is closed.
The piping circuit of the vacuum system of the suction cup 21 is cut off to prevent air leakage. After the photo sensor B19 detects and confirms that the number of sheets to be picked up is one, the
The stopper cylinder 11 is driven as shown in FIG. 1, and the lifting stopper 10 is pulled upward, that is, into the stopper cylinder 11, whereby the extension of the spring is reduced, and the substrate 1 is released from the tension of the spring 8 and lifted further upward.

If two substrates 13 are not attracted by the suction cup 1 in a stacked manner, but in a normal state, that is, only one substrate is attracted, the stopper cylinder 11 is immediately actuated by the photo sensor B19 so as not to apply stress to the spring 8. Then the lift stopper 10 pulls it upward.

The attracted substrate 13 is moved onto the processing conveyor 20 on the right side by driving the forward and backward movement cylinder 12 in the left and right directions as shown by the arrows. After moving, the vacuum pump 2 is stopped, the substrate 13 is removed from the suction cup 1, and placed on the processing conveyor 20.

The above operations are repeated to continuously handle and supply the substrates 13. The lifting table 14 is
The photo sensor A17 drives and adjusts the drive of the motor 16 so that the top surface of the substrate 13 is always maintained at a constant level.

As described above, according to the present invention, from a stacked state of perforated plates, it is possible to reliably separate the perforated plates one by one without causing scratches on the surface and automatically supply them to various manufacturing devices. Since there is no need to align the suction cup for each product, it is highly effective in unmanned high-mix, low-volume production.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a vacuum piping diagram, and FIGS. 3 a, b, c, and d are side views illustrating the suction operation of the suction unit of the present invention. 1... Suction cup, 2... Vacuum pump, 3... Solenoid valve,
4...Pressure detector, 5...Flexible hose,
6... Upper and lower cylinders, 6a... Shaft, 7...
Suction cup head, 8... Spring, 9... Mounting plate, 1
0... Ascent stopper, 11... Stopper cylinder, 12... Forward and backward movement cylinder, 13... Board,
14... Lifting table, 15... Screw, 16...
Motor, 17...Photo sensor A, 18...
Hole, 19... Photo sensor B, 20... Processing conveyor, 21... Suction cup in contact with hole 18.

Claims (1)

[Scope of claim for utility model registration] Plural vacuum suction cups 1 and 2 connected to exhaust means 2
1 by means of springs 8, mechanisms 6 and 6a for lifting the holding plates, and means for preventing the perforated plate 13 attracted by the suction cups from rising when the holding plates rise. 10, and a spring is used as the spring, the maximum tension of which is smaller than the suction force of the suction cups 1 that are not in contact with the holes 18 of the perforated plate, and greater than the suction force of the suction cups 21 that are in contact with the holes. A feeding device for perforated plates, characterized in that: