JPH0310507B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a printing method for printing numbers, symbols, etc. on both the front and back surfaces of ultra-small articles such as chip-shaped articles, such as prismatic chip capacitors and prismatic chip resistors. Regarding equipment.

<Problems to be solved by the invention> Chip-shaped electronic components such as chip capacitors and chip resistors have a width of 1.6 mm, a length of 3.2 mm, and a thickness of 0.6 mm, for example.
Although it is extremely small, having a rectangular shape of mm and weighing just over 10 mg, it must be printed to display resistance values, capacitance values, etc.

Conventionally, voltage was applied only to one side of these electronic components, so when mounting the item on a printed circuit board, etc.
A step was necessary to turn the printed surface to the front side.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a device for printing on both the front and back sides of a chip-shaped article in order to simplify the process of mounting electronic components on a printed circuit board, etc. It is an object of the present invention to provide a technique for manufacturing with a small area, simple structure, and low cost, and in particular, to simplify an article reversing mechanism.

<Means for solving the problems> FIG. 1 shows a plan view of the present invention. Two parallel conveyance paths 2 and 3 are provided along the outer circumference of the turntable 1 along concentric circles. The outer conveyance path 2 is the first conveyance path, and the inner conveyance path 3 is the second conveyance path. Along this circular loop-shaped conveyance path, an article supply device 4, a printing device 5, an ink drying device 6, an article takeout device 7, and an article reversing device 8 are sequentially arranged. The article supply device 4 supplies the first article to be printed.
Place it on the conveyor path. The printing device 5 has first and second printing devices.
Printing is performed in parallel on the substrates on the conveyance path. The ink drying device 6 irradiates energy such as ultraviolet rays to the printed articles on the first and second conveyance paths. The article take-out device 7 takes out the printed article on the second conveyance path to the outside. The article reversing device 8 takes out the printed article on the first conveyance path, turns it upside down, and places it on the second conveyance path.

<Function> The printed article placed on the first conveyance path 2 from the article supply device 4 is transferred to the printing device 5, the ink drying device 6, the article reversing device 8, the printing device 5, the ink drying device 6, and the article taking out device 7. It is then taken out to the outside.

<Example> FIG. 2 shows a perspective view of a portion of an example of the present invention.
The rim 11 on the outer periphery of the turntable 1 has a dividing groove 1
2 into an inner side and an outer side, and rectangular grooves 13 . . . 13 penetrating in the radial direction are cut at a predetermined pitch. The inner row of the rectangular grooves 13 constitutes the first conveyance path 2, and the outer row constitutes the second conveyance path 3.

A loader 15 is provided for supplying the printing material W from the component supply device 14 to the first conveyance path, and a stopper 16 is provided in the dividing groove corresponding to the exit of the loader 15.
is provided to prevent it from entering the second conveyance path.

As shown in a cross-sectional view in FIG. 3, the article positioning device 17 includes a lid 18 that covers the upper surface of the rim 11, a partition wall 19 that fits into the partition groove 12, and a partition wall 19 that fits into the partition groove 12. Small holes 20 and 21 for positioning are bored near both the inner and outer surfaces of the wall 19, and these small holes are communicated with an air source (not shown). When the printing material W held inside or outside of the rectangular groove 13 passes through the small holes 20 and 21, it is attracted to the wall surface of the partition wall 19 and is positioned in the radial direction.

FIG. 4 shows the printing device 5. A restraining plate 22 is provided on the upper surface of the conveyance path, and adheres to the printing roller 23 to prevent the printed product from floating up. The holding plate 22 has slits 24 and 25 for exposing the printed portion. Ink is supplied to the printing roller 23 from an ink fountain 26 via a series of rollers 27 to a plate roller 28 . The printing roller 28 and the printing roller 23 are of a double type so that they can print in parallel and simultaneously on the articles on the first and second conveyance paths. The ink used is ultraviolet curable. The ink drying device 6 is an ultraviolet irradiator that irradiates the articles on the first and second conveyance paths.

The article retrieval device 7 has an air source (not shown)
By this, the articles on the second conveyance path are sucked and stored in the storage box.

An embodiment of the article reversing device 8 is shown in FIG. A flexible tube 29 is provided outside the first and second conveyance paths 2 and 3 of the turntable 1 . The suction side end 30 of the tube 29 is tightly connected to the linear feeder 31 by fitting, and the other end, the discharge side end 32, is tightly connected to the linear feeder 31.
It is also closely connected by fitting. Further, the tube 29 is bent so that an inverted portion 34 is formed between both end portions 30 and 32. The one linear feeder 31 has an opening side end 31
A is disposed to face point A of the first conveyance path 2, and an air outlet 35 for sending out articles on the conveyance path is provided on the opposite side of the linear feeder 31. Further, the other linear feeder 33 is disposed with its open end 33A facing the conveyance path to which the transfer is desired, and the linear feeder 3
3 is provided with an air suction port 36 so that articles sent to the inlet of the linear feeder 31 via the tube 8 and the linear feeder 31 by an air source (not shown) are sucked in.
Note that 37 is a stopper provided on the opposite side of the linear feeder 33. In such a device, the printing material that has arrived at point A on the first conveyance path 2 is placed on the linear feeder 31 with the printed side facing upward.
is sucked into the tube 8 through the tube. While passing through the tube 8, the top and bottom sides of the printed product are reversed at a bent reversing section 34, and the printed surface is reversed downward from the linear feeder 33, and the product is transferred to the second conveyance path as it is.

<Effects> According to the present invention, it is possible to perform double-sided printing with a device that has the same floor space as a conventional single-sided printing machine, and in spite of double-sided printing, there are no turntables, printing devices,
Since only one dryer and the like is required, the entire device is made smaller and simpler.

Further, by using a tube as the reversing device of this type of device, the reversing device can be constructed extremely simply, so that not only the components can be made smaller, but also assembly can be simple and inexpensive. Furthermore,
Since the conveyance speed can be easily adjusted by adjusting the strength of the air, the conveyance can be made faster and more stable than in a system using a combination of mechanical parts. Further, even if the shapes of the printing materials vary, by using a tube whose shape corresponds to the shape of the printing materials, the purpose of reversing the printing materials can be easily achieved. Furthermore, since the flexibility of the tube is utilized, even if there is an obstacle in the middle of the transfer, it can be easily overcome, so the first and second transfer paths do not necessarily have to be in a planar loop shape as in the illustrated example. Even if it is not formed, it can be easily adapted to other methods, and therefore, it is possible to provide versatility when designing this type of device.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the entire embodiment of the present invention. FIG. 2 is a perspective view showing a portion of the embodiment, FIG. 3 is a sectional view of the positioning device 17 shown in FIG. 2, and FIG.
The figure is a perspective view showing another part (printing device) of the embodiment, and FIG. 5 is a perspective view showing another part (reversing device) of the embodiment.
FIG. 1... Turntable, 2... First conveyance path,
3... second conveyance path, 4... article supply device, 5...
...Printing device, 6...Ink drying device, 7...Article take-out device, 8...Article reversing device.

Claims (1)

[Scope of Claims] 1. With the article to be printed facing outward on one side, 2.
first and second conveyance paths for conveying the individual pieces in parallel;
an article supplying device for placing printed articles on the conveyance path; a printing device for printing in parallel on the printed articles on the first and second conveyance paths; an ink drying device; and an ink drying device for the first conveyance path. an article reversing device that takes out a printed article, turns it over and places it on the second conveyance path, and an article takeout device that takes out the printed article on the second conveyance path before the reversing device. In the double-sided printing device for chip-shaped articles, the article reversing device includes a flexible tube, and a suction end of the tube faces the first conveyance path, and an ejection end faces the second conveyance path. The edge is
The tubes are arranged to face each other directly or indirectly through a feeder, and the tube is bent between its suction end and discharge end to form a reversal section for reversing the printed product. A double-sided printing device for chip-shaped articles, characterized in that: