JPH04216700A - Conveying equipment of thin printed board - Google Patents

Abstract

PURPOSE:To obtain a conveying equipment capable of maintaining the specified carriage direction of a thin printed board, by installing a thin printed board wherein sending holes are arranged on both side edges, two conveying belts having sending protrusions, and clips which pinch the printed board and the belts in the state that the sending protrusions are engaged with the sending holes. CONSTITUTION:Sending holes 6 are arranged on a pair of both side edges outside a product region 10 in a thin printed board 5. Two conveying belts 7 have sending protrusions 8 which are engaged with the sending holes 6 on each side edge. Clips 9 pinch both side edges of the board 5 and the conveying belts 7 at a plurality of portions, in the state that the sending protrusions 8 of the belts 7 are engaged with the sending holes 6 of the board 5. Thereby the flatness of the thin printed board 5 is maintained during carriage, and it is prevented that the specified carriage direction of the thin printed board 5 is obstructed by external force like water pressure and wind pressure in the case of liquid treatment or drying treatment.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying device for thin printed circuit boards, and more particularly to a conveying device suitable for use in liquid processing. In recent years, electronic devices have become smaller and lighter, and this trend is also seen in printed wiring boards. In order to reduce the size and weight of printed wiring boards, technological development has progressed to reduce the thickness of printed wiring boards, and currently, multilayer printed wiring boards with a four-layer structure and an overall thickness of less than 0.5 mm are being developed. In order to mass-produce such ultra-thin printed wiring boards, conventional manufacturing methods have various inconveniences, so there is a need to develop means to solve each of these problems.

0002

[Prior Art] Among the above problems, when thin printed circuit boards are subjected to liquid treatment (for example, plating process, cleaning process using various chemicals, etc.), the thin printed circuit boards are transported to a predetermined position in the target cleaning equipment. In the process, the following problems occur. FIG. 2 is a diagram showing a conventional conveyance method. In order to make the explanation of the configuration and operation easier to understand, the same parts are given the same reference numerals throughout the drawings, and their repeated explanation will be omitted.

FIG. 2(a) shows a Soroban type conveyor. Rollers are distributed and coupled to two parallel shafts,
This device transports a thin printed circuit board by inserting a thin printed circuit board (not shown) between these rollers in a direction perpendicular to the shaft direction and driving one or both of the shafts in reverse as indicated by arrows A and A'. be. FIG. 2(b) shows a squeeze roll type conveyor. In this method, cylindrical rolls used for removing moisture after liquid processing are installed coaxially on two parallel shafts, and a thin printed circuit board (not shown) is sandwiched between the rolls in a direction perpendicular to the shaft direction. This is a device for transporting thin printed circuit boards by inserting the board into the board and driving one or both of the shafts in reverse as indicated by arrows A and A'.

FIG. 2(c) shows a sectional view of the transport mechanism. In the figure, 1 is a thin printed circuit board, and 2 is a conveyor, which may be either the Soroban type or the roll type. The thin printed circuit board 1 is conveyed in the direction of arrow B by driving the rollers of the conveyor 2 in reverse directions as indicated by arrows A and A'. Shower nozzles 3 are arranged opposite to each other for spraying cleaning liquid 4 for processing in directions P and P', respectively, on both the front and back surfaces of the thin printed circuit board 1 that has been transported. In this manner, a conventional transport device for liquid processing of thin printed circuit boards was constructed.

[0005]

[Problems to be Solved by the Invention] As the thin printed circuit board 1 becomes thinner and thinner, and its total thickness becomes less than 0.5 mm, it becomes easily deformed like paper. For this reason, when the tip of the thin printed circuit board 1 that has been conveyed enters the sprayed liquid due to the slight pressure difference between the cleaning liquid 4 that is sprayed in the P and P' directions from the shower nozzles 3 that are arranged opposite to each other, it moves in the moving direction B. The tip of the thin printed circuit board 1 bends or vibrates as shown in the figure, and collides with the surface of the next roller. This phenomenon occurs not only in the shower nozzle 3 but also in wind pressure from a drying blower or the like. If this condition becomes severe, the object may deviate from the predetermined direction of movement, making it impossible to carry it normally and causing deformation or damage.

The present invention was made in view of the above-mentioned drawbacks of the conventional art, and it is an object of the present invention to provide a conveyance device capable of maintaining a predetermined conveyance direction of a thin printed circuit board.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention, as shown in FIG. 10, the thin printed circuit board 5 provided on a pair of opposite side edges outside of the thin printed circuit board 5; clips 9 that sandwich both side edges of the thin printed circuit board 5 and the conveyance belt 7 at a plurality of locations with the feed holes 6 of the printed circuit board 5 fitted into the feed protrusions 8 of the conveyance belt 7; Configure.

[0008]

[Operation] In the present invention, as shown in FIG. 1, the feed holes 6 provided on both side edges of the thin printed circuit board 5 and the feed protrusions 8 provided on the conveyor belt 7 fit into corresponding positions, and a plurality of feed holes 6 are fitted into corresponding positions. Since the thin printed circuit board 5 and the conveyor belt 7 are sandwiched and fixed by the clips 9, it is possible to perform liquid processing using the shower nozzle 3 or drying processing using a blower (not shown) while maintaining the flatness of the thin printed circuit board 1. Become. Therefore, it is possible to prevent the thin printed circuit board 5 from being bent or deviating from a predetermined conveyance direction due to differences in water pressure or wind pressure.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the conveying method of the present invention, and FIG.
1(a) shows a thin printed circuit board mounted on a conveyor belt, and FIG. 1(b) shows an enlarged perspective view of the thin printed circuit board alone. In both figures, reference numeral 5 denotes a thin printed circuit board, in which feed holes 6 are provided at regular intervals on a pair of both side edges outside the product area (not shown) of the thin printed circuit board 5 shown in FIG. 2(c). . The region of the feed hole 6 is cut and removed to the dimensions of the product region 10 immediately before the thin printed circuit board 5 is completed. A conveyor belt 7 is provided at positions corresponding to the two rows of feed holes 6, and is equipped with an endless drive mechanism (not shown). 8 is a conveyor belt 7
These are feed projections provided so as to fit into two rows of the feed holes 6. The thin printed circuit board 5 is mounted by fitting the feed holes 6 on both side edges into the feed protrusions 8 of the two conveyor belts 7. Reference numeral 9 denotes an elastic clip, and in the mounted state, the conveyor belt 7 and the thin printed circuit board 5 are clamped and temporarily fixed at a plurality of locations by the clips 9. With the thin printed circuit board 5 mounted on the conveyor belt 7 in this manner, the conveyor belt 7 is driven in the direction of arrow B to pass through a cleaning device or a drying device.

By fixing both side edges of the thin printed circuit board 5 using the clips 9 in this manner, the flatness of the thin printed circuit board 5 during transportation is maintained and can withstand deformation due to external force.

[0011]

As is clear from the above description, according to the present invention, when a thin printed circuit board is subjected to liquid processing or dry processing, the predetermined conveyance direction of the thin printed circuit board is obstructed by external forces such as water pressure and wind pressure. This is effective in improving the efficiency of the thin printed circuit board manufacturing process and improving yield.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the conveyance method of the present invention.

FIG. 2 is a diagram showing a conventional conveyance method.

[Explanation of symbols]

5 Thin printed circuit board 6 Spread hole 7 Conveyance belt 8 Feeding protrusion 9 Clip 10 Product area

Claims (1)

[Claims] 1. A conveyance device for conveying a thin printed circuit board, wherein the thin printed circuit board (5) is provided with feed holes (6) on a pair of both side edges outside a product area (10) of the thin printed circuit board (5). (5), two conveyor belts (7) comprising feed protrusions (8) that fit into the feed holes (6) on each side edge, and the thin printed circuit board (5).
With the feed holes (6) of the thin printed circuit board (5) fitted into the feed protrusions (8) of the transport belt (7),
A conveying device for a thin printed circuit board, characterized in that it is comprised of clips (9) that clamp both side edges of the conveyor belt (7) and the conveyor belt (7) at a plurality of places.