JPH0253179B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for positioning a sheet-like object by fitting a positioning pin into a pin hole drilled in the sheet-like object. Regarding this, it is particularly effective for positioning original plates, photosensitive materials, etc. in plate-making work.

<Prior art> For example, when automatically positioning a sheet-like object such as an original plate or photosensitive material in plate-making work, the pin hole of the sheet-like object, which is suction-supported by a carrier having a suction cup, is placed on a table. Its positioning is performed by fitting it into a positioning pin. At this time, even if the positioning accuracy of the carrier is precise, the center of the pin hole and the center of the positioning pin do not necessarily match accurately due to the state in which the sheet-like object is suctioned and supported by a suction cup, etc., and the pin hole is damaged. Sometimes.

Therefore, in the specification of Japanese Patent Application No. 57-26438 (Japanese Unexamined Patent Publication No. 58-143333), page 6, line 13 to page 7, line 1, and page 7, line 10 to line 17, As disclosed, a tapered positioning pin is used, and at the position where the tip of the positioning pin is slightly inserted into the pin hole of the sheet-like object, a small amount of air is released from the suction part that was performing suction and holding. A method has been proposed in which the suction is released by blowing air, the sheet is allowed to fall under its own weight, the pin holes are fitted into the positioning pins, and the carrier is then lowered to completely mount the sheet on the table. ing.

<Problems to be Solved by the Invention> In the above-mentioned method, for example, when a pin hole is drilled only at the tip of a sheet-like object, as shown in FIG. When the suction holding of the sheet 2 is released and the sheet is dropped under its own weight, most of the sheet 2 comes into contact with the surface of the table 4, and the friction between the sheet 2 and the surface of the table 4 causes the pin hole 6 to become attached to the positioning pin 8. may not fit completely. If the carrier is lowered in this state and the sheet-like material 2 is pressed with mechanical force, the pin hole 6 will be damaged.

<Means for Solving the Problems> As a means for solving the above-mentioned problems, the present invention positions a sheet-like object by fitting a positioning pin into a pin hole drilled in the sheet-like object. In the positioning method performed, a pin having a tapered portion at least near the tip is used as the positioning pin, and the sheet-like object is slightly fitted into a pin hole formed in the sheet-like object with the tapered portion of the positioning pin. The present invention provides a method for positioning a sheet-like object, in which the sheet-like object is stopped at a position, released from its holding, and then air is blown from above at least near the pin hole to fit the pin hole into the positioning pin.

<Function> Even if the sheet-like object becomes the state shown in Fig. 5 when the adsorption and holding of the sheet-like object is released, air is blown from the top of the sheet-like object near the pin hole. By doing this, it is possible to completely fit the pin hole into the positioning pin and to accurately mount the sheet-like object on the table, and since the sheet-like object is not pressed by mechanical force, the pin hole can be completely fitted into the positioning pin. There is no risk of damaging the hole.

In addition, when air is blown from the top of the sheet-like object, if air is also blown from the bottom surface of the sheet-like object, the friction between the sheet-like object and the table surface will be reduced, and the positioning pin will not fit into the pin hole. It becomes easier.

<Example> Hereinafter, a method for positioning a sheet-like object according to the present invention will be explained based on the accompanying drawings.

FIG. 1 is a front view showing an embodiment of the sheet-like object positioning mechanism used in carrying out the method of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a top view of table 4, and FIG. 1 is a partially enlarged view of section A in FIG. 1.

In these figures, reference numeral 10 moves along with the transport mechanism 12 in the left-right direction in FIG.
6, the carrier moves in the vertical direction in FIG. A plurality of suction cups 18 and nozzles 20 connected to an air compressor and blowing air near the pin holes 6 of the sheet-like material 2 are respectively provided. Reference numeral 4 designates a table on which the sheet-like material 2 is mounted, and a ventilation groove 5 is provided on the top surface of the table (see Fig. 3). A ventilation hole 7 is provided. Further, two pins 8 having a tapered portion 9 are arranged at the tip of the table 4.

In the above-mentioned apparatus, the carrier 10 which sucks and holds the sheet-like material 2 with the suction cup 18 in the sheet-like material supply section (not shown) moves in the left-right direction in FIG. Stops directly above. Next, Carrier 10 descends and
As shown in FIG. 4, the pin 8 stops when its tapered portion 9 is slightly fitted into the pin hole 6 formed in the sheet-like material 2. Then, the adsorption action of the suction cup 18 is released, and a small amount of air is blown out from the suction cup 18, so that the sheet-like material 2 falls onto the table 4 by its own weight (the state shown in FIG. 5). Subsequently, high-pressure air is blown from the nozzle 20 toward the pin hole 6 to completely fit the pin hole 6 into the positioning pin 8, thereby positioning the sheet-like material 2 on the table 4. At this time, if the friction between the sheet-like material 2 and the surface of the table 4 is reduced by blowing air toward the lower surface of the sheet-like material 2 from the ventilation hole 5 provided on the table 4, the pin hole 5 The mounting on the positioning pin 8 becomes more reliable.

Note that the positioning pin 8 described in the above embodiment
The tapered portion 9 does not necessarily have to be linear and may be curved.

<Effects of the Invention> The method for positioning a flexible sheet according to the present invention uses a positioning pin having a tapered portion, and also uses air to align the pin holes in the sheet without applying mechanical force to the sheet. Since the positioning pin is fitted into the positioning pin, there is no risk of damaging the pin hole, which is easily damaged, and it is possible to perform accurate positioning.

Further, when air is also blown from the bottom surface of the sheet-like object, the friction between the sheet-like object and the table surface is reduced, and the fitting of the pin hole to the positioning pin can be performed more reliably.

In particular, since the pin hole is only slightly inserted into the tapered part of the pin, a large mating margin is formed, making mating easy, and the pin is then positioned in an accurate position by blowing air. Compared to mechanical fitting, the air and the sheet match well and can be fitted without strain, and the positioning with the pins can be rough, resulting in improved work efficiency.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the sheet-like object positioning mechanism used in carrying out the method of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a top view of table 4, and FIG. 1 is a partially enlarged view of part A in FIG. 1, and FIG. 5 is a schematic diagram showing a state in which the sheet-like object 2 has fallen onto the table 4 under its own weight. 2... Sheet-like material, 4... Table, 5... Ventilation groove,
6... Pin hole, 8... Positioning pin, 9... Taper part, 10... Carrier, 18... Suction cup, 20... Nozzle.

Claims (1)

[Scope of Claims] 1. In a positioning method for positioning a sheet-like object by fitting a positioning pin from above into a pin hole drilled in a sheet-like object held by a carrier, the positioning pin may be used as the positioning pin. Using a pin having a tapered portion at least near the tip, stopping the sheet-like object at a position where the tapered portion of the positioning pin is slightly inserted into a pin hole drilled in the sheet-like object, and releasing the holding; A method for positioning a sheet-like object, characterized in that the pin hole is then completely fitted into the positioning pin by blowing air from above at least near the pin hole. 2 When blowing air near the pin hole from the top,
The method for positioning a sheet-like object according to claim 1, wherein air is also blown onto the lower surface of the sheet-like object.