JPS606250B2 - Constant counting method and device for parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a constant counting method and apparatus for packaging a predetermined number of small parts, such as diodes and resistors, from which both side leads are derived from a main body, such as bagging or boxing. It is related to.

Generally, these types of parts are sorted and taken out in the final manufacturing process, but at the time of rescue, 100 or 200 parts are
Books are packaged in groups of a certain number.

In this packaging work, two methods are mainly used: counting a large number of parts one by one, and counting a predetermined number of parts by detecting their total weight. In this latter weight-conversion counting method, the larger the number of parts, the larger the error, and the more inconvenient troubles such as insufficient number of parts were occurring. Therefore, if we try to adopt the former method of counting parts one by one, the number of parts will be counted up to a predetermined number N, eliminating the problem of running out of parts.However, in order to make this counting accurate and quick, Although it is necessary to reliably and quickly feed parts, this is not currently being done properly. By the way, the following magnetic feeding method has been proposed as a method for effectively sorting and feeding this type of parts.

That is, as shown in Fig. 1, the lead wire 2 of this type of component 1 is a method that takes advantage of the fact that the lead wire 2 of this type of component 1 is a Fe-Ni iron wire material that has been subjected to treatments such as nickel plating, and is mostly magnetic. A conventional example will be explained with reference to FIGS. 2 and 3.
Note that 3 in FIG. 1 is a component body, and the lead wires 2 are led out from this component body 3 at an angle of 180 degrees to both sides. In Figures 2 and 3, 4 is a parts feeder and 5 is a magnetic feeder.
5 consists of a guide cover 6, a pair of magnets 7 arranged in a V-shape, a guide plate 8, and a take-out drum 9.The parts feeder 14 is of a normal parts feeding mechanism.
A built-in viprator causes the entire device to vibrate minutely, and the vibrations gradually transport the component 1 to the outlet 4'.
Then, the component 1 falls from the outlet 4' onto the guide cover 6 and enters the space m between each magnet 7. Since a parallel magnetic field acts in the space m between the magnets 7, the lead wires 2 of the component 1 are aligned in the direction of the magnetic field, and are eventually held suspended in the space m and aligned. Also, magnet 7
Since the side of the parts ejecting drum 9 is narrower, the floatingly held parts 1 are pulled by a stronger magnetic field and are conveyed to the parts ejecting drum 9.
As the parts 1 rotate, the parts 1 are sequentially taken out. still"
The removal of the component 1 by the component removal drum 9 is performed by vacuum suctioning the main body 3 of the component 1 through the groove 101 on the drum cylinder. By the way, the parts 1 taken out by the Tojin pick-up drum 9 are peeled off from the groove 10 of the drum by means such as the movable claw 11 and counted. At that time, if the drum rotation speed is the same, if the rotation speed is high, For example, the timing of stopping the supply after counting up becomes difficult, and the supply amount (number) becomes inaccurate.

Conversely, if the speed is low, accurate feeding is possible, but the feeding speed is slow. It is also possible to improve work efficiency by slowing down the speed when the count reaches N-Q, but in this case, the control signal is sent to the speed drive side when the count reaches N-Q. This made the control system complicated and there was a high risk of malfunction. The present invention has been improved in view of the problems of taking out the part 1 in a suspended state using a magnetic field and constant counting.The following describes embodiments of the method and apparatus of the present invention with reference to the drawings. and explain.

In Figures 4 to 6, i2 is a magnetic box,
13 is a suction plate, 14 is a peeling plate, 15 is a sensor, and 16 is a tray for receiving parts. The magnetic box 12 is of the same type as the magnetic feeder 1 described above, and is used to hold the parts 1 floating between two magnets 17 and to align them. This magnet box 12 is moved up and down by a cylinder 18 as appropriate. Next is the suction plate 13, which is arranged in the upper part of the magnetic box 12 in the feeding direction of the part 1, and one end of which is attached to the cylinder 1.
It is connected to 9.

A series of N+Q grooves 20 are provided on the lower end surface of the suction plate 13, and each groove 20' is provided with a vacuum nozzle 21 connected to a vacuum pump. Here, N
L is the predetermined number of parts 1 to be packaged, and L is the number corresponding to the replenishment. In addition, the main body 3 of one component 1 is iron-bonded to one groove 201 by vacuum suction.
are arranged along both sides of the suction plate 13, and their tips are formed into a tapered shape and are arranged at the same height position as the groove 20 of the suction plate 13.

In other words, when the suction plate 13 suctions the component 1 and moves in the direction of the peeling plate 14, the lead wire 2 of the component 1 hits the napper-shaped tip surface 22, and the component 1 is peeled off from the groove 20. The peeling plate 4 is pivotally attached to the shaft 23, and when the number of parts wings to be peeled off and falling reaches N, the peeling plate 14 is moved around the shaft 23 by the operation of the cylinder 24. The part 1' peeled off by the peeling plate 14 is detected by the sensor 15, and the part 1' is removed from the suction plate 13.
It counts as 6. This sensor 15 may be a phototube or the like. Next, the operating procedure of the above-mentioned chain formation will be explained.

First, as shown in FIG. 4, the suction plate 13 is placed on the side of the magnet box 12, and air is removed from the vacuum nozzle 21. Then, the floating parts 1 are vacuum-adsorbed one by one in each of the two grooves. In this case, the component 1 is not actually attracted to all the grooves 20, and there is always a groove 20' in which no component tortoise is absorbed. Since so-called tooth extraction occurs, a slightly smaller number of parts 1 than (N+Q) are suctioned onto the suction plate 13. Then, the suction plate 13 is moved back and forth toward the cylinder 19 at high speed. This cylinder 19 is one with a cushion, and the cylinder 19 is moved in and out from a high distance outside the cushion. In addition, high-speed withdrawal is possible from the beginning to approximately N grooves 2
0 passes through the tapered tip surface 22 of the peeling plate '4. The remaining approximately Q portions are then moved in and out at low speed using the cushion of the cylinder 19. This speed control of N high speeds and Q low speeds is one of the key points of the method of the present invention. In this way, part 1 is placed in groove 2.
Up to N pieces of 0 are first peeled off at high speed and fall onto the tray 16. At this time, the sensor 15 detects the falling parts 1 and counts the number of parts 1, but the number of parts counted so far is less than N because of the above-mentioned tooth extraction. Therefore, the shortfall is made up for by the next low-speed movement. That is, by gradually adjusting the peeling plate 14 with Q grooves 20, the parts 1 are peeled off one by one at a low speed and fall, and the count is added. When the counter 25 counts N pieces at a certain point, it issues a signal to end the count, and that signal also activates the cylinder 24, causing the peeling plate 14 to separate from the suction plate 13, and from then on, the part 1 is peeled off. No withdrawals will be made. At this time, exactly N parts 1 are supplied to the tray 16. When one removal of Toji is completed in this way, the suction plate 13 and peeling plate 14 are returned to their original positions,
If necessary, push the magnetic box 12 up a little with the cylinder 18 and repeat the above operation. In addition, the suction plate 13
Although the cylinders 19 and 24 are used to control the operation of the peeling plate 14, for example, a cam or the like may be used to change the movement speed and timing.

As explained above, according to the present invention, most of the constant counting is performed at high speed, and the rest is performed at low speed.
The overall counting speed becomes faster and the index can be improved, and since the timing of supply stop after count-up can be performed at a lower speed, the supply amount (number) becomes more accurate and it is possible to improve the reliability of component constant packaging. be.

[Brief explanation of the drawing]

Fig. 1 is a front view of small parts such as diodes and resistors, Fig. 2 is a perspective view of a conventional magnetic feeder which is a parts supply device, and Fig. 3 is a side view showing a part of it in cross section.
FIG. 4 is a side view showing a part of a constant counting device in cross section showing an embodiment of the device according to the present invention, FIG. 5 is a plan view thereof, and FIG. 6 is a left side view thereof. 1...Parts, 13...Adsorption plate, 14...Peeling plate, 1
5...Sensor, 20,20...Skin vacuum nozzle. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. In a method of counting a constant number N of parts held floating using a magnetic field, the parts held floating are vacuum suctioned to the end face of a suction plate by (N+α) suction nozzles. Then, the suction plate is moved along the stripping plate at high speed by a length corresponding to N pieces, and then lowered to a low speed, and the parts that are peeled off by the stripping plate and falling are sequentially transferred to N pieces. A constant counting method for parts, which is characterized by counting up to 100%. 2. In a device that uses a magnetic field to count a constant number N of floating parts, a suction plate with a vacuum nozzle that vacuum-chucks only (N+α) floating parts and a suction plate along the suction plate are used. The device is equipped with a stripping plate that peels off parts from the suction plate by moving the suction plate, and a sensor that sequentially detects parts that are peeled off and falling by the peeling plate. The peeling plate is moved at high speed for the length corresponding to the number of parts, and at low speed for the length corresponding to the next α parts, and the peeling plate is moved away from the suction plate when the sensor detects N parts. Constant counting device.