JPH07227561A - Waste coating applying device of syringe for applying resin liquid - Google Patents

Abstract

PURPOSE:To realize an increase in the number of waste coating applying times by forming a waste coating applying body to a cylinder form, rotating this cylindrical waste coating applying body by a proper angle at every waste coating applying on the outer peripheral surface of the cylindrical waste coating applying body and moving the waste coating applying body by a proper size in an axial line direction. CONSTITUTION:A printed circuit board 11 is formed with plural pieces of adhesive parts 11a for electronic parts 10 on its front surface and a syringe 12 descends toward the respective adhesive parts 11a after moving in X- and Y directions along the front surface of this printed circuit board 11, thereby applying adhesives 14 for tack welding of the electronic parts to the respective adhesive parts 11a. This waste coating device is provided with the cylindrical waste coating body 15 for executing waste coating by the syringe 12. The waste coating body 15 is disposed in the section on the side of the printed circuit board 11 in such a manner that the axial line 15a of the waste coating body 15 parallels approximately with the surface of the printed circuit board 11. The waste coating body 15 is supported freely rotatably via bearings and freely slidably in an axial line direction on a machine bed at its supporting shaft 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a normal discharge of a resin liquid from a nozzle in the syringe when a resin liquid such as an adhesive for mounting electronic parts is applied to a printed circuit board or the like by a syringe. The present invention relates to a device for performing a waste coating to confirm the state.

[0002]

2. Description of the Related Art Generally, when mounting an electronic component such as a transistor on a printed circuit board, an adhesive is first applied to a mounting position of the electronic component on the surface of the printed circuit board, and the adhesive is used for the mounting. After the electronic component is temporarily attached to the printed board, the electronic component is soldered to the printed board.

When the adhesive is applied to the printed circuit board, as shown in FIG. 4, which is well known in the art, the syringe 1 containing the adhesive is placed on the surface of the printed circuit board 2 in a predetermined manner. After moving to the mounting location,
Then, the syringe 1 is moved downward so as to approach the printed circuit board 2, and then a predetermined amount of the adhesive is discharged from the nozzle 3 of the syringe 1 so that the adhesive 4 is applied to a predetermined portion of the printed circuit board 1. I try to apply it.

By the way, at the time of this application, it is necessary to check whether the discharge amount from the nozzle 3 of the syringe 1 is normal or at the end of the work, all the adhesive in the syringe 1 is removed. In order to exhaust the air in the syringe 1 at the time of consuming it, or at the time of starting the work, it is necessary to discard and apply it to a place other than the place where the electronic component is attached.

Therefore, in the prior art, Japanese Patent Laid-Open No. 3-2066864
As described in Japanese Patent Publication No. JP-A-2003-264, the coating on the surface of the printed circuit board is performed in a blank space other than the mounting position of the electronic component, or as shown in FIG. While disposing a flat discard coating plate 5 on the side of the syringe 1, the syringe 1 is moved to a position above the discard coating plate 5, and then the discard coating 1a from the nozzle 3 of the syringe 1 is discarded. It is designed to be applied to the surface of the coating plate 5.

[0006]

However, as in the former method, the method of performing the waste coating on the blank space of the surface of the printed circuit board has a problem that the number of times of the waste coating is limited. On the other hand, like the latter,
In the method of performing the discard coating on the flat discard coating plate 5 disposed on the side of the printed circuit board, although the number of discard coating can be increased, the discard coating plate 5 is
The table 6 has to be moved in both the X and Y directions after each waste coating, and in addition to requiring a large floor area, it requires an XY table, which makes the apparatus significantly large. There is a problem that not only the price will increase, but also the price will increase significantly.

SUMMARY OF THE INVENTION The present invention has a technical object to provide a discarding coating device which solves these problems.

[0008]

In order to achieve this technical object, the present invention provides a "syringe at a side portion of an object to be coated such as a printed circuit board on which a resin liquid such as an adhesive is applied by a syringe. In a waste coating device comprising a waste coating body for performing the waste coating by means of the above method, the waste coating body is formed into a cylindrical shape whose axis is substantially parallel to the resin coating surface of the object to be coated. The shape discarding applicator is configured to rotate by an appropriate angle and move by an appropriate dimension in the axial direction for each discarding application to the outer peripheral surface of the cylindrical discard applicator. ”

[0009]

[Operation] In this way, the discarding applicator is formed in a cylindrical shape, and the cylindrical discarding applicator is rotated by an appropriate angle for each discarding application to the outer peripheral surface of the cylindrical discarding applicator, and the axial line By being configured to move by an appropriate dimension in the direction, the discarding application by the syringe to the outer peripheral surface of the cylindrical discarding applicator is a spiral shape that surrounds the outer peripheral surface of the cylindrical discarding applicator in its circumferential direction. It can be done along a trajectory.

[0010]

As described above, according to the present invention, the number of times of waste coating that can be performed on the waste coating body can be increased, while the cylindrical waste coating body is rotated by an appropriate angle. , It is only necessary to move by an appropriate size in the axial direction, and the floor area can be remarkably reduced and the structure can be simplified as compared with the conventional one in which a flat waste coating plate is moved by a YX table. Therefore, there is an effect that the device can be significantly downsized and the cost can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings of FIGS. In the figure, reference numeral 11 indicates a printed circuit board which is an example of the object to be coated, and a plurality of mounting portions 11a for the electronic component 10 are formed on the surface of the printed circuit board 11.

Reference numeral 12 indicates a syringe in which an adhesive, which is one example of a resin liquid, is discharged from a nozzle 13, and the syringe 12 extends along the surface of the printed circuit board 11 in the X direction. After moving in the Y direction and then in the Y direction, the adhesive 14 for temporary mounting of electronic components is applied to each mounting portion 11a by descending.

Reference numeral 15 indicates a discarded coating body for performing the discarded coating by the syringe 12, and the discarded coating body 1
5 is formed into a cylindrical shape, which is formed on the printed circuit board 11
The axis 15 of the discarding applicator body 15 is located on the side of the
Arranged so that a is substantially parallel to the surface of the printed circuit board 11, and configured to perform the waste coating 12a by the syringe 12 on the outer peripheral surface of the cylindrical waste coating body 15.
A support shaft 16 for the cylindrical waste applicator 15 is rotatably supported by a bearing portion 18 attached to a machine base 17, and
The shaft is slidably supported in the axial direction.

A screw shaft portion 19 is provided on the support shaft 16 of the cylindrical waste applicator body 15, and the screw shaft portion 19 is screwed into the female screw hole 20a of the nut member 20 fixed to the bearing portion 18. Meanwhile, the support shaft 16
Is formed in a hollow shaft joint portion 16b having a long groove hole 16b ', and a drive shaft 21 rotationally driven by a motor or the like (not shown) is planted in the drive shaft 21 in the shaft joint portion 16b. By disposing the provided pin 21a slidably so as to fit in the slot 16b ', the cylindrical waste applicator body 15 is discarded by the syringe 12 to the outer peripheral surface of the cylindrical waste applicator body 15. Each time the coating 12a is performed, it is interlocked with the coating 12a and intermittently rotated by an angle θ in the direction of the arrow A.

In this structure, the cylindrical waste coating body 15
After the waste coating on the outer peripheral surface of the cylindrical waste coating body 15, the motor is rotated by an appropriate angle θ in the arrow direction A at the same time, and at the same time, the screw shaft portion 19 provided on the support shaft 16 is fixed to the nut member 20. By being screwed into the female screw hole 20a in the above, it can be moved by an appropriate dimension in the axial direction indicated by the arrow B.

That is, the cylindrical discarding applicator 15 is
Each time the waste coating is applied to the outer peripheral surface of the cylindrical waste coating body 15, the cylindrical waste coating body 1 is rotated by an appropriate angle θ and moved by an appropriate dimension in the axial direction.
Disposal application 1 by the syringe 12 on the outer peripheral surface of
2a can be carried out along a spiral locus 22 that goes around the outer peripheral surface of the cylindrical waste applicator 15 in the circumferential direction.

In this case, the discarding application 12a performed on the outer peripheral surface of the cylindrical discarding applicator body 15 is such that the cylindrical discarding applicator body 15 is rotated with the scraper being in contact with the outer peripheral surface thereof. Can be easily removed, and instead of this, the cylindrical waste applicator 1
It is also possible that a paper or synthetic resin film 23 for throwing away is removably wound around the outer peripheral surface of No. 5 and the film 23 for throwing away is peeled off after the completion of the throwing away coat. is there.

Then, as in the above-mentioned embodiment, the support shaft 16 of the cylindrical discarding applicator body 15 is supported by the bearing portion 18.
The support shaft 16 is rotatably supported so as to be slidable in the axial direction, and the support shaft 16 is provided with a screw shaft portion 19 screwed into a nut member 20 fixed to the bearing portion 18. The discarding applicator 15 is angled in the direction of the arrow θ
By rotating only, at the same time, this cylindrical waste coating body 1
Since 5 can be moved in the axial direction by an appropriate size, there is an advantage that the mechanism can be remarkably simplified.

The present invention is not limited to the case where the adhesive 14 for temporarily attaching the electronic component 10 to the printed circuit board 11 is applied to the printed circuit board 11 as in the above-described embodiment, and the present invention can be applied to other applications. It goes without saying that it is also applicable.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing a conventional one.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electronic parts 11 Printed circuit board 12 Syringe 13 Syringe nozzle 15 Cylindrical waste application body 16 Support shaft 17 Machine stand 18 Bearing part 19 Screw shaft part 20 Nut member 21 Drive shaft

Claims (1)

[Claims] 1. A throw-away application body for disposing a resin solution such as an adhesive with a syringe at a side portion of an article to be applied such as a printed circuit board. In the coating apparatus, the discarding applicator is formed into a cylindrical shape whose axis is substantially parallel to the resin coating surface of the object to be coated, and the cylindrical discarding applicator is discarded to the outer peripheral surface of the cylindrical discarding applicator. A discarding coating device for a resin liquid coating syringe, characterized in that the coating liquid is rotated by an appropriate angle for each application and moved by an appropriate dimension in the axial direction.