JPS63228698A - Electronic parts feeder of chip mounter - 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 [Field of Industrial Application] The present invention relates to a supply device for chip electronic components of a chip mounter, and more particularly to prevention of chip electronic components from dancing when the chip mounter is attracted.

[Conventional technology]

A tape feeder, which is a component feeding device for a conventional chip electronic component t-electronic circuit board IC device, is a component feeding device for a chip mounter that uses an electronic circuit board IC device. Although there is a component mounting device, there is no discussion of a structure in which a tape presser is provided on a tape presser plate via an elastic body as a method for preventing tape vibration.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the chip electronic component is conveyed at a predetermined bibute by vertical movement of a conveyance lever provided on a tape feeder, thereby rotating a sprocket.

However, the chip electronic components dance when the tape is conveyed, and since the chip electronic components are not in the normal state at the time of stop, the suction nozzle of the chip mounter cannot pick up the components, resulting in a suction error. The vertical movement of the tape is a factor behind this phenomenon in which the chip electronic components dance.

Therefore, the objective is to reduce the vertical movement of the tape during conveyance.

[Means for solving problems]

The above object is to reduce the vertical movement of the tape during tape transport in order to suppress the dancing of chip electronic components at the opening position of the chip component supply section. Press the tape from the upper side with a presser plate to reduce vertical movement. This is achieved by having an elastic body on the tape surface of the tape holding plate, which has the effect of reducing vertical movement of the tape.

[Effect]

In a chip mounter that mounts chip electronic components onto a circuit board, a tape holding plate is used to press the tape against the bottom before and after the opening of the tape feeder device that supplies the chip electronic components taped to the tape. reduce motion. This tape pressing plate is pressed against the tape side through an elastic body (rubber plate) to measure the effect of reducing vertical movement of the tape.

With such a tape presser plate structure, the tape surface and the presser plate surface are in close contact with each other, so that slight vertical movement of the tape can be suppressed.

By using the above-described tape holding plate, chip electronic components are completely prevented from dancing, and there is no dancing during transportation. Therefore, components can be fed to the chip mounter, eliminating the conventional component suction mistakes [Example ] Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 shows a fixed cover on which a chip electronic component 21 taped to 1ri tape is mounted.

Reference numeral 2 indicates a main body in which all parts are assembled, 3 indicates a lever for conveying the tape on which electronic parts are taped, and is the axis 4 of the vertical movement of the lever 3. Reference numeral 5 indicates a pawl, and the pawl 5 moves back and forth as the lever 3 moves up and down.

6 indicates a fixed support plate, and 7 indicates a sprocket.

8 indicates a belt. Reference numeral 9 indicates a reel for winding up the above tape 10. Reference numeral 11 indicates a guide plate that guides the tape in a horizontal plane. Reference numeral 12 indicates a presser plate that presses the tape. This presser plate 12 is pulled upward by a spring 14 on the opposite side, and its axis indicates 13. Reference numeral 15 denotes a tape holding plate, which is pressed from above by a spring 16. 17 is the upper stopper k of lever 3 Indication L% 18
The lower stopper of the tri lever 3 is shown. Reference numeral 19 indicates the opening 8 of the chip electronic component, and reference numeral 20 indicates a suction nozzle from the mounter.

Next, I will explain how it works. The lever 3 is moved up and down by the tape 21 of chip electronic components taped to the tape and the cam from the chip mounter. The lever 3 is centered around an axis 4 of the lever 3, and its stroke is restricted by an upper stopper 17 and a lower stopper 18, with a turning radius defined for vertical movement. When the lever 3 moves up and down, the claw 5 moves forward and backward. By moving the pawl 5 back and forth, the sprocket 7 is rotated at a constant bit rate at the tip of the pawl 5. At that time,
There is a fixed support plate 6 that allows the sprocket 7 to come to a complete stop and not move. As shown in the figure, the tape 21 is conveyed along the lower side of the tape presser plate 12 and sent to an intermediate position between the tape guide 11 and the tape presser plate 12. The above tape 10 is peeled off at the opening 19 and wound onto the reel 9. The rotational power of the sprocket 70 is transmitted to the reel 9 via the belt 8. The rotation of the sprocket 7 is transmitted to the reel 9 by the belt 8. As a structure for preventing vertical vibration during conveyance of the tape 21, a tape presser plate 12 is provided on the rear side of the opening 19, and a tape presser 15 is provided on the front side. The tape holding plates 12 and 15 are made by adhering and fixing a rubber plate, which is an elastic body, to the tape surface side, and sufficiently pressing the tape 21 so that no gap is created between the tape holding plate and the tape surface. A structure with a holding plate.

The detailed structure of the tape pressing plate of the present invention is shown in FIG. Second
As shown in the figure, a presser plate 12 that suppresses the vertical movement of the tape 21
, and 1502 locations. The tape presser plate 12 has a structure in which when the tape presser plate 12 is pulled upward by a spring 14 about an axis 13 as a fulcrum, force is applied to the tip of the presser plate 12 and presses the tape 21. The presser plate spring 12 alone cannot completely suppress the vertical movement of the tape 21.

Therefore, as shown in FIG. 2, by adhesively fixing an elastic body IA such as rubber to the lower side of the presser plate 12, the gap between the tapes 21 can be completely eliminated and the vertical movement of the tapes 21 can be reduced. Similarly, the structure is such that it is pressed by 15 presser plates and 16 vC springs. Two rubber members are also adhesively fixed to the lower side of the presser plate 15 to suppress vertical movement of the tape 21.

As the mounting tact time for electronic circuit boards becomes faster, the movement of chip electronic components becomes apparent.

According to the invention, as shown in FIG. 3, 3C indicates the movement of the lever. The left side shows the lever at the top, and the cam from the digital input unit pushes the lever down to the bottom and returns to the top again. This operation is repeated.

When the lever 3C is lowered, the waveform shown below shows the movement of the tape, and at the same time as the lever 3C is lowered, the tape is conveyed and the tape moves up and down.

The one indicated by break #+B shows the vertical movement of the tape in the conventional tape holding plate structure. fruit! 2B is the case of the tape pressing plate of the present invention. As shown in FIG. 3, the magnitude of vibrational displacement of the tape at the position where the nozzle of the chip mounter picks up the chip electronic component is important. The timing of lever movement is indicated by 3C. A is the starting point at which the lever is pushed down by the cam from the chip mounter and the tape is conveyed. The lever is pushed down and the bottom dead center is B. Point B is the point where the tape is completely VCJM fed, and this is the position where the chip mounter's suction nozzle suctions the chip electronic component, and it is sufficient if the tape vibration displacement here is small.

The broken line here shows the case of the tape holding plate of the conventional structure, and the solid line shows the case of the tape holding plate of the present invention. As can be seen from the position of point B, it can be seen that the vertical movement of the tape is significantly attenuated.

The 0 point indicates the point at which the lever starts to rise, and the 9 point indicates the point at which the lever is completely at its original position i[Vc.

〔Effect of the invention〕

As described above, by reducing the vertical movement of the tape at the suction position of the nozzle, it was possible to suppress the dancing of the chip electronic components. Therefore, parts can be completely supplied to the chip mounter, and the mounting rate on the circuit board is improved.

[Brief explanation of drawings]

FIG. 1 shows the overall structure of a tape feeder, and FIG. 2 shows a partially enlarged view of an embodiment of the present invention. FIG. 3 shows a diagram showing the effects of the embodiment. 1...Fixed cover mA, 2A...Elastic body 2
... Body 3 ... Lever 4 ... Axis of vertical movement of lever 3 5 ... Claw 6 ... Fixed support plate
7... Sprocket 8... Belt 9...
・Reel 10... Upper tape 11...
Guide plate 12...Tape holding plate 13...Axis center 14...Spring 15...Tape holding plate 16
... Spring 17 ... Upper stopper 18 ...
・Lower stopper 19...opening 20...
Suction nozzle 21...Tape 22...Reel
IA...Rubber 2A...Rubber IB...Movement of the tape in the conventional structure 2B...Movement of the tape in the present invention Person...Indicates the starting position of the tape at the same time as the lever is lowered. B: Indicates the position where the lever is at the bottom dead center, indicating the point at which the tape has been completely conveyed. C... Indicates the position where the lever rises to the top. D: Indicates the point at which the lever has returned to the upper position. The horizontal axis shows time, and the vertical axis shows the amount of displacement of the tape.

Claims (1)

[Claims] Chip electronic components are stored in a tape with equally spaced holes.■This tape is wound onto a reel to a certain diameter.
This reel is installed in a tape feeder, and the tape is moved by a predetermined pitch while being held between a guide plate and a tape holding plate, and parts are taken out at a predetermined position. An electronic component supply device for a chip mounter, characterized in that an elastic body is adhesively fixed to the lower surface of the tape side.