JPH0310506B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is mainly applied to printing for printing numbers, symbols, etc. on both the front and back sides of ultra-small chip-shaped articles such as rectangular chip capacitors and rectangular chip resistors. It is related to the device.

<Prior art> Ultra-small chip electronic components such as rectangular chip capacitors and rectangular chip resistors have a width of, for example,
Although it is extremely small, having a rectangular shape of 1.6 mm, 3.2 mm in length, and 0.6 mm in thickness, and weighing about 10 mg, it must be printed to display resistance values, capacitance, etc. Must be. A three-dimensional article printing device suitable for such uses has been devised by the present applicant (see Japanese Patent Laid-Open No. 59-52653).

<Problems to be Solved by the Invention> This three-dimensional article printing device can perform good printing even on ultra-small chip-shaped electronic components as described above, but the printing is only on one side of the electronic component. Therefore, when mounting these electronic components on a printed circuit board, there is a problem in that a step is required to orient the printed surface to the front side.

Therefore, a marking device for printing on both the front and back sides of such chip-shaped articles (Japanese Unexamined Patent Publication No. 1983-1999) was developed.
(see Publication No. 13749) has been proposed. However,
This device has a reversing mechanism for reversing the front and back of the printing material in the conveyance path of the printing material that is linearly transported, so the printing means consisting of a marking head and dryer can be used for printing on the front side and for printing on the back side. Two devices are required, one for printing, and the entire device becomes extremely large and expensive, and each mechanism is arranged in a straight line, so there is a problem that a large installation space is required.

Furthermore, since the reversing mechanism simultaneously holds a frame holding multiple printing materials in a row on the front side in the conveyance direction and sends it out on the rear side, timing is difficult, and it stops at each time, so it cannot be used at high speeds. There are drawbacks that cannot be reversed.

The present invention has been made in view of these conventional problems, and it is possible to print on both sides of a chip-shaped article using a single printing means, thereby reducing the size and size of the chip-shaped article.
The technical objective is to provide a double-sided printing device that can reduce costs, increase speed, and significantly reduce the installation floor space.

<Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, a double-sided printing device for chip-shaped articles is configured as follows. That is, a plurality of holding grooves each having a shape in which two chip-shaped articles are inserted in series in the radial direction from the circumferential edge are formed at equal intervals along the circumferential edge, and the rows of these holding grooves are A turntable for transporting chip-shaped articles is divided into two by a circular dividing groove communicating with the central part to form a first transport path on the outside and a second transport path on the inside, and is rotated at a constant speed, Around the turntable in the direction of rotation thereof, as the turntable rotates, a stopper located in the dividing groove
an article supply section that sequentially feeds chip-shaped articles to be printed only to each holding groove on the conveyance path, a printing section that performs the same printing in parallel on each chip-shaped article on both the conveyance paths, and each chip on both the conveyance paths. an ink drying section that acts commonly on the shaped articles; an article take-out section that takes out the printed chip-shaped article on the second conveyance path; and an article take-out section that takes out the printed chip-shaped article on the first conveyance path and turns it upside down. an article reversing mechanism for returning the article through the holding groove of the first conveying path onto the holding groove of the second conveying path; a reversing disk arranged at regular intervals along the turntable, positioned perpendicularly to the turntable and rotating synchronously; It is characterized by being composed of a take-out air chute and a feed-in air chute that are provided to communicate with each other.

<Function> With respect to the turntable that always rotates at a constant speed, each time the holding grooves of the turntable face the article supply section, the chip-shaped articles are fed into the holding grooves and come into contact with the stoppers located in the dividing grooves. It stands still on the first conveyance path, and is sequentially transported as the turntable rotates. When passing through the printing section, printing is applied to the entire surface, and the ink used for printing is dried in the ink drying section.

Then, the printed chip-shaped article on the second conveyance path is taken out in the article take-out section, and then, in the article reversing mechanism, the chip-shaped article printed on one side on the first conveyance path is passed through the take-out air chute. The material is then sent to the reversing disk, and is inserted into the reversing disk storage section which is constantly rotating in synchronization with the turntable, and after the reversing disk is turned around by approximately half a turn, it is turned over. , and is fed into the holding groove through the feeding air chute with the printed side facing downward. At this time, the holding groove is blank because the chip-shaped article has been taken out at the take-out air chute and the article take-out section, respectively, in both the first conveyance path and the second conveyance path, so the holding groove is empty because the chip-shaped article has been taken out from the first conveyance path and the second conveyance path, respectively. The shaped article passes through the first conveying path and is located in the second conveying path. As the turntable rotates, this chip-shaped article passes through a printing section and an ink drying section, is printed on the other side, and is discharged from an article take-out section.

This double-sided printing device uses a single printing section and an ink drying section to simultaneously print on one side and the other side of each chip-shaped article on two types of conveyance paths, and also prints on two sides of the chip-shaped articles in the ink drying section. Since the shaped articles are commonly dried, the structure is simple and compact, and since the chip-shaped articles are transported in a circular manner, a small installation space is required. Furthermore, since the reversing disk is constantly rotating in synchronization with the turntable, and the first conveyance path and the second conveyance path are in communication with each other through the holding groove, the chip-shaped articles can be transported through the air chute. By being able to feed the material to the reversing mechanism, the speed can be increased.

<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view schematically showing the overall configuration of an embodiment of the present invention, in which an outer first conveying path 2 and an inner first conveying path 2 are arranged parallel to each other along concentric circles on the outer periphery of an article conveying turntable 1. Two transport paths 3 are provided. Along these circular loop-shaped conveyance paths 2 and 3,
Article supply section 4, article positioning section 17, printing section 5,
An ink drying section 6, an article take-out section 7, and an article reversing mechanism 8 are arranged in order in the direction of rotation of the turntable 1 shown by the arrow.

As shown in FIG. 2, the article supply unit 4 includes an article feeder 1 that feeds out a chip-shaped article W as a printing material.
4, and a loader 1 that transfers the chip-shaped article W sent out from the article supply device 14 to the first conveyance path 2.
5. On the other hand, the rim 11 on the outer periphery of the turntable 1 has a plurality of rectangular holding grooves 13 that are slightly longer than the length of the two chip-shaped articles W in series and extend in the radial direction from the periphery. , are formed at equal intervals along the circumferential edge, and the row of these holding grooves 13 is divided into two by a circular dividing groove 12 that communicates with the central part thereof.
A conveyance path 2 and a second conveyance path 3 are formed. Further, a stopper 16 is provided at a portion of the dividing groove 12 facing the supply outlet of the loader 15, and this stopper 16 prevents the chip-shaped article W supplied from the loader 15 from entering the second conveyance path 3. ing.

As shown in the sectional view of FIG. 3, the article positioning section 17 includes a lid 18 that covers the rim 11, that is, the upper surface of both conveyance paths 2 and 3, and a partition wall 1 that fits into the dividing groove 12.
A pair of small-diameter positioning holes 20 and 21 are formed in the lid body 18 and communicate with both sides of the partition wall 19, respectively.
0 and 21 are connected to a vacuum source (not shown). Therefore, each chip-shaped article W in the first conveyance section 2 and the third conveyance path 3 of the holding groove 13
When passing through the positioning part 17, the partition wall 19
The turntable 1 is positioned in the radial direction by being pressed against both sides of the turntable 1.

As shown in FIG. 4, in the printing section 5, a restraining plate 22 is provided on the upper surface of both conveyance paths 2 and 3, in which two slits 24 and 25 are bored through which a printing roller 23, which will be described later, is inserted. Then, printing ink is supplied from the ink fountain 26 to the printing roller 23 via a series of rollers 27 and a plate roller 28, and the two plate rollers 28 and printing roller 23 print each chip shape on both transport paths 2 and 3. The same printing is applied to the articles W in parallel and at the same time. Note that the holding plate 22 prevents the chip-shaped article W from adhering to the printing roller 23 and floating up. Furthermore, an ultraviolet curing ink is used as the printing ink, and the ink drying section 6 at the latter stage in the direction of rotation of the turntable 1 is constituted by an ultraviolet irradiator. The shaped article W is simultaneously irradiated with ultraviolet light.

The article reversing mechanism 8 has a structure as shown in FIG. That is, the reversing disk 29, which has notch-shaped storage portions 31 arranged at regular intervals on its peripheral edge into which the chip-shaped articles W are inserted, has its rotation axis 30 parallel to the surface of the turntable 1. It is positioned near the turntable 1 in a state perpendicular to the surface of the turntable 1, and is rotated in the direction of the arrow in synchronization with the turntable 1 by a motor 38 shown in FIG. This reversing disk 29 has a cylindrical cover 32.
is circumscribed to prevent the chip-shaped article W in the storage section 31 from falling off. A groove-shaped take-out air chute 33 and a feed-in air chute 3 are installed on both left and right sides of this reversing disc 29.
5 are interposed so as to communicate between the holding groove 13 of the turntable 1 and the storage section 31 of the reversing disk 29, respectively, and the chip-shaped articles W on the first conveyance path 2 are connected to the air chute 33 for taking out. an air blowing section 34 that moves the inside of the air chute 33 from point A to point B and sends it into the storage section 31;
is installed oppositely, and similarly air chute 3 for feeding
5 is also provided with an air blowing part (not shown) for moving the chip-shaped article W in the storage part 31 from point C to point D in the air chute 35 and sending it into the holding groove 13. A stopper 36 is provided at a position inside the second conveying section 3 opposite to the air chute 35.

Next, the operation of the above embodiment will be explained. Each time each holding groove 13 of the turntable 1, which is constantly rotating at a constant speed, faces the loader 15 of the article supply section 4, a chip-shaped article W is transferred from the loader 15 to the holding groove 1.
3 and comes into contact with the stopper 16 located in the dividing groove 12 and stops on the first conveyance path 2, and is sequentially transferred as the turntable 1 rotates, and after being positioned by the article positioning section 17. ,
When passing through the printing section 5, printing is applied to a predetermined location on one surface, and the ink used for printing is dried in the ink drying section 6.

Then, the printed chip-shaped article W on the second conveyance path 3 is taken out in the article take-out section 7, and then, in the article reversing mechanism 8, the chip-shaped article W on the first conveyance path 2 printed on one side is removed. The article W is transferred from point A to point B within the take-out air chute 33 by the air blown out from the air blowing section 34, and the reversing disk 29 is constantly rotated in synchronization with the turntable 1. 31, and the reversing disk 29 rotates approximately half a turn to invert the printed surface downward, and then the inside of the feeding air chute 35 is moved from point C to point D by the air jetted from the air blowing section. It is transferred and fed into the holding groove 13. At this time, the holding groove 13 is in a blank state because the chip-shaped article W has been taken out in the take-out air chute 33 and the article take-out part 7, respectively, in both the first conveyance section 2 and the second conveyance path 3. Groove 13
The chip-shaped article W that has been fed passes through the first conveyance path 2, comes into contact with the stopper 36, and comes to rest on the second conveyance path 3. As the turntable 1 rotates, this chip-shaped article W passes through the printing section 5 and the ink drying section 6 to be printed on the other side in the same manner as described above, and is discharged by the article take-out section 7. Therefore, between the article supply section 4 and the article take-out section 7, chip-shaped articles W are present in both conveyance paths 2 and 3, and between the article take-out section 7 and the article reversing mechanism 8, the chip-shaped article W exists in the first conveyance path 2. Chip-shaped article W only on top
There is a chip-shaped article W only on the second conveyance path 3 between the article reversing mechanism 8 and the article supply section 4.
is operated continuously in the presence of

This double-sided printing device uses a single printing section 5 to
Since each chip-shaped article W on the seed conveyance paths 2 and 3 is printed at the same time, and the two chip-shaped articles W are simultaneously dried in the ink drying section 6, the configuration is greatly simplified and becomes extremely small. Moreover, since the chip-shaped article W is transferred in a circular manner, a small installation space is required. Further, the reversing disk 29 is constantly rotating in synchronization with the turntable 1 without stopping, and the first conveyance path 2 and the second conveyance path 3 are in communication with each other through the holding groove 13. Since the chip-shaped article W can be fed to the article reversing mechanism 8 through the air chute 33, 35, the speed can be significantly increased.

Note that the present invention is not limited only to the contents of the above description and drawings, and may include various modifications without departing from the scope of the claims. For example, the air shoots 33 and 35 are not limited to groove shapes, and may be of any shape as long as they can guide the chip-shaped article so as to restrict its movement.

<Effects of the Invention> As described above, the double-sided printing device for chip-shaped articles of the present invention can be installed on approximately the same floor space as existing single-sided printing devices, and double-sided printing can be performed using a single printing section and ink drying section. Since it can be applied by a method, the structure is simple, the entire device can be made compact, and it can be manufactured at low cost.
Furthermore, the article reversing mechanism can be operated at all times, and chip-shaped articles can be transferred between the turntable and the article reversing mechanism via the air chute, so that a marked increase in speed can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of the overall configuration of an embodiment of the present invention, FIG. 2 is a cutaway perspective view of a part of FIG. 1, and FIG.
1, FIG. 4 is a perspective view of the printing section of FIG. 1, and FIG. 5 is a perspective view of the article reversing mechanism of FIG. 1. W... Chip-shaped article, 1... Turntable,
2...First conveyance path, 3...Second conveyance path, 4...
...article supply section, 5...printing section, 6...ink drying section, 7...article take-out section, 8...article reversing mechanism, 12...separation groove, 13...holding groove, 16...
Stopper, 29... Disk for reversing, 31... Storage section, 33... Air chute for taking out, 35...
...Air chute for feeding.

Claims (1)

[Claims] 1. A plurality of retaining grooves into which two chip-shaped articles are inserted in series in the radial direction from the circumferential edge are formed at equal intervals along the circumferential edge, and the row of retaining grooves is connected to the center of these grooves. A first transport path on the outside and a second transport path on the inside are divided into two by a circular dividing groove that communicates with the section, and is equipped with a turntable for transporting chip-shaped articles that rotates at a constant speed. As the turntable rotates, the chip-shaped article to be printed is sequentially fed only to each holding groove of the first conveyance path by a stopper located in the dividing groove as the turntable rotates. an article supplying section that performs the same printing in parallel on each chip-shaped article on both of the conveyance paths, an ink drying section that acts in common on each chip-shaped article on both of the conveyance paths, and an ink drying section that acts in common on each of the chip-shaped articles on both of the conveyance paths; an article retrieval unit that takes out the printed chip-shaped article from the first conveyance path, takes out the printed chip-shaped article from the first conveyance path, turns it over, and then passes it through the holding groove of the first conveyance path to the second conveyance path;
The article reversing mechanism is arranged in the order of the article reversing mechanism for returning on the holding groove of the conveyance path, and the article reversing mechanism is arranged such that the chip-shaped article accommodating part is arranged at regular intervals along the peripheral edge part,
a reversing disk positioned perpendicularly to the turntable and rotating synchronously; and a take-out air chute provided on both sides of the reversing disk so as to communicate the holding groove and the storage section, respectively; 1. A double-sided printing device for chip-shaped articles, characterized by comprising a feeding air chute.