JP3410203B2 - How to handle electronic components - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a large number of electronic components to be worked on at the same time when an electrode is applied to the surface of an electronic component. Thus, the present invention relates to a method for regularly aligning electronic components on a plate. 2. Description of the Related Art In the manufacture of electronic components having electrodes on both sides of a disk-shaped unit such as a ceramic capacitor, a nest plate is used as a jig for transporting and positioning the unit when performing electrode printing. Used. The nest plate 1 shown in FIG. 4 is made of a metal plate-like body, and on one main surface thereof, a large number of cavities 2 which are circular concave portions for accommodating electronic components are arranged. A through hole 3 is provided on the bottom surface of the tee 2. In each of the cavities 2, a disc element (hereinafter referred to as a work) constituting a ceramic capacitor or the like is stored and aligned one by one, and the nest plate 1 and a printing machine are conveyed by a conveyor such as a conveyor. Transported to
The work is fixed by applying suction pressure downward from the through-hole 3, and a squeegee, a roller or a brush is run on the upper surface of the nest plate 1, so that a large number of works are coated and printed with electrodes. In addition to the formation of electrodes, work such as symbol display, measurement, and automatic taping has been performed efficiently with a large number of works arranged on a nest plate. Conventionally, the work is stored in the nest plate 1 after a large number of works are transferred from the upper portion of the nest plate 1 and then appropriately stored in the cavity 2 by a manual operation or a jig. , As shown in FIG.
There is a case where all the works 4 are not housed in the cavity 2 in a normal state and are arranged out of the cavity 2. Further, when the nest plate 1 containing the work 4 is transferred, the work 4 is vibrated by a transfer device such as a conveyor.
In some cases, the misalignment was further increased, or the workpiece 4 jumped out to the normally stored work 4. As shown in the cross-sectional view of FIG. 6, when the work 4 is out of the cavity 2, not only printing failure occurs at the time of forming electrodes, but also the work 4 protrudes from the cavity 2. Inconveniences such as that the part prevents the movement of the rollers and the like and that the work 4 is damaged is caused. [0006] It is very time-consuming to fit the workpieces 4 coming out of the cavities 2 one by one into a normal position before the printing operation. It is also possible to blow off only the air and remove it. However, there is a problem that the electrode material enters into the cavity 2 from which the work 4 has been removed at the time of forming the electrode thereafter, and the inside of the cavity 2 is soiled. The nest plate 1 after the work 4 has been transferred and appropriately provisionally arranged is subjected to vibration for several seconds at 60 to 100 Hz and amplitude of 1 to 2 mm from one or two directions, thereby causing a deviation. The vibrating work 4 is guided to a normal position where the work 4 is completely housed in the cavity 2. However, this method has the following disadvantages. That is, since the shift direction of the work does not match each work, there is a work in which the shift cannot be corrected depending on the state of the shift direction and the amplitude direction, and the shift increases. Further, such automatic control of the frequency and amplitude by the electromagnetic vibration method or the like requires high equipment cost, but has a drawback that the correction rate is not always high as described above. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of handling an electronic component in which all the workpieces are securely housed and aligned in a cavity on a nest plate by a simple method, and the subsequent operations can be easily performed. Is to provide. [0010] In order to solve the above-mentioned problems, the present invention provides a disk-shaped electronic component on an open-top box to which air supply and intake means are connected. A plate having a plurality of concave portions of the same size as that on the upper surface is placed, and disk-shaped electronic components are stored and aligned one by one in the plurality of concave portions. in handling an electronic component for fixing an electronic component of disc-shaped by the intake air from the through holes provided in parts, partition the perforated plate between the box body plate and the air supply and suction means, circle A method for handling electronic components, comprising temporarily arranging a plate-shaped electronic component on a concave portion, then blowing air out of the through hole for a predetermined time to temporarily float each electronic component and then storing the electronic component in the concave portion. is there. The work which has been removed from the cavity is blown upward by air blown out from the through hole in the bottom surface of the cavity together with the normally accommodated work. At this time, the air blown out from the through hole uniformly flows between the inner wall surface of the cavity and the periphery of the work and blows out to the outside, so that the work floats at a position directly above the cavity in a horizontal state. After that, if you stop blowing air,
The work located just above the cavity falls by gravity and is accurately stored in the cavity. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The same parts as those of the prior art are denoted by the same reference numerals. FIG. 1 is a cross-sectional view showing the vicinity of a nest plate of an apparatus used in the present invention. The nest plate 1 has a cavity 2 which is a circular concave portion for accommodating a work on its surface, similarly to the conventional nest plate. Many cavities are arranged regularly, and a through hole 3 is provided at the center of the bottom of each cavity 2.
Is provided. The nest plate 1 is placed on an open-top box 6 to which an air pipe 5 for supplying and sucking air is connected below, to form a closed space below the nest plate 1. The space between the nest plate 1 and the air pipe 5 in the closed space is partitioned by a perforated plate 7.
The air supplied from the air pipe 5 by the perforated plate 7 is uniformly flowed over the entire nest plate 1 and each cavity 2
And the air flow rate is the same. In order to align the works 4 on the nest plate 1, a large number of works 4 are first placed on the nest plate 1 by a transfer method or the like, and a temporary means is set so that one electronic component corresponds to each cavity 2 by appropriate means. At this point, the work 4 may not be accurately stored and may have a portion projecting above the nest plate 1. Next, air is supplied from an air pipe 5 to a closed space below the nest plate 1 to blow air out of a through hole 3 on the bottom surface of the cavity 2 so that all the workpieces 4 are suspended in the air. Center just above 2. Thereafter, when the air supply from the air pipe 5 is stopped, the work 4 falls so as to be accurately stored in the cavity 2. FIG. 2 shows an air supply and intake mechanism. First, the air supply mechanism 8 is controlled to supply and stop air to the nest plate 1 through the air pipe 5.
After correcting the position of the work 4, the valve is switched, the suction mechanism 9 is operated to apply suction pressure to the nest plate 1 through the air pipe 5, and the work 4 is cavity-caved by the suction pressure through the through hole 3, as in the conventional example. Fix inside 2. The air supply for correcting the position of the work 4 need only be supplied once for several seconds, but the time and the number of times are not particularly limited. However, if the work 4 is lifted for an excessively long time in order to further improve the correction rate, there is a possibility that the work 4 may deviate from the position above the cavity 2. In this case, the air is blown and stopped for a short time. Is preferably repeated several times. As shown in FIG. 3, the principle of correcting the displacement of the work 4 according to the present invention utilizes a phenomenon in which air tries to pass uniformly between the nest plate 1 and the work 4 and the cavity 2 is used. When the air 10 blows out from the through hole 3 to the work 4 inside, the air 10 blows up the work 4 onto the cavity 2 and at the same time passes evenly between the cavity 2 and the work 4 and discharges it to the outside. , Work 4
Floats above the center of the cavity 2 while maintaining a horizontal state. As a first step, the work 4 is floated above the cavity 2 by the above-mentioned large flow rate of air 10 to perform a coarse adjustment. Next, as a second step, the work 4 is lifted in the cavity 2. Small flow of air 11
If the air is controlled so as to perform fine adjustment, the correction rate can be further improved. Using the method of the present invention, a diameter of 3.5 m
Correction experiments were performed on two types of workpieces having a disk shape of m and 8.0 mm, and the results shown in Table 1 were obtained. [Table 1] As described above, according to the present invention, the position deviation between the work and the cavity is corrected by blowing air from under the cavity, so that the vibration is applied to the nest plate. As described above, there is an effect that the correction rate is increased without causing a problem that a deviation from the cavity is expanded due to the vibration, thereby increasing the correction rate. For example, in the case of a φ6.0 mm work that was impossible with the conventional vibration method. , ± 2 mm displacement can be corrected. The correction rate was 99.99% at the stage of mass production. Further, since the suction through-hole which has been conventionally used for fixing the work can be used as it is and only the flow rate of the blown air is controlled, the control can be performed in comparison with the electromagnetic vibration method. There is also an effect that the method is simple and the cost is low.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view near a nest plate of an apparatus used in the method of the present invention. FIG. 2 is a front view showing a mechanism for supplying air to a nest plate and a suction mechanism. FIG. 3 is a partial cross-sectional view of the vicinity of a cavity showing a principle of correcting a work misalignment according to the present invention. FIG. 4 is a perspective view of a nest plate. FIG. 5 is a partially enlarged view of a nest plate in which a work having a displacement exists. FIG. 6 is a partial cross-sectional view of a nest plate in which a workpiece having a position shift exists. [Description of Signs] 1 Nest plate 2 Cavity 3 Through hole 4 Work 10, 11 Air

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Eiji Kano               2-26-10 Tenjin, Nagaokakyo-shi, Kyoto, Japan               Murata Manufacturing Co., Ltd.                (56) References JP-A-51-134861 (JP, A)

Claims (1)

(57) [Claims 1] A plurality of concave portions having the same size as a disk-shaped electronic component are formed on an open top box to which air supply and intake means are connected. The plate arranged on the upper surface is placed, the disc-shaped electronic components are stored and aligned one by one in a plurality of concave portions, and air is sucked in from a through hole provided in the center of the bottom surface of the concave portion. In the electronic component handling method for fixing the disc-shaped electronic component, the plate inside the box and the air supply and suction means are partitioned by a perforated plate, and the disc-shaped electronic component is temporarily arranged on the concave portion. After that, air is blown out from the through-hole for a predetermined time so that each electronic component is once floated and then housed in the concave portion.