JP2558927Y2 - Plate positioning device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for positioning a printing plate when positioning the printing plate on a plate processing apparatus.

[0002]

2. Description of the Related Art In a printing operation using a sheet-fed rotary printing press for multi-color printing, multi-color printing is performed on the same sheet of paper. It is important that the positions of the pictures to be printed match exactly. Therefore, a reference hole is formed in advance in each printing plate mounted on the plate cylinder of the printing unit of each color, and a plate making operation is performed by setting a pattern position of each color in accordance with the reference hole. In order to mount the printing plate on the plate cylinder, the reference hole of the printing plate is matched with the reference hole of the plate cylinder, a reference pin is inserted into the plate, and the printing plate is wound around the peripheral surface of the plate cylinder. After attaching, the bottom side of the printing plate is inserted between the press plates of the plate cylinder and closed to fix it. In order to mount the printing plate on the plate cylinder in this way, it is necessary to form a reference hole on the grip side of the printing plate and a bent portion on the tail side.

When forming a reference hole or a bent portion in a printing plate, the printing plate is attached to a processing device such as a punching / bending device to perform processing such as punching or bending. When the printing plate is mounted on the processing device, the printing plate is positioned at a predetermined position by the positioning device.

A positioning device is a positioning pin which is inserted into a positioning hole formed in a printing plate in advance by an automatic drawing machine or the like disclosed in Japanese Utility Model Laid-Open No. 60-048492 proposed and published by the present applicant. It has. The printing plate is positioned at a predetermined position of the processing device by inserting the positioning pins into the positioning holes.

[0005]

As shown in FIG. 4, when the positioning holes 2 of the printing plate 1 are misaligned with the positioning pins 3, as shown in FIG. In some cases, the positioning pins 3 lift the printing plate 1 to make accurate positioning impossible. in this case,
An operator moves the printing plate 1 to engage the positioning holes 2 and the positioning pins 3 to perform positioning.

[0006]

According to the present invention, there is provided a printing plate positioning apparatus having a positioning pin inserted into a positioning hole of a printing plate, wherein a tip of the positioning pin is tapered. And a plate holding member for preventing the plate from floating when the positioning pin is inserted into the positioning hole, and the plate holding member is provided with a positioning pin.
A through-hole is formed through which the printing plate is placed.
Is a plate-like member with a slight gap between the plate and
It is characterized by the following.

[0007]

The plate is prevented from being lifted by a plate holding member having a through hole through which the positioning pin passes . The locating pin with the tapered tip penetrates the locating hole and the plate holding member.
If the printing plate is misaligned during the insertion process
The printing plate is moved by a slight gap to position the printing plate in an appropriate position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of a plate mounting board in a plate processing apparatus having a plate positioning apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the plate processing apparatus, and FIG. 3 shows a cross section of a plate positioning device according to an embodiment of the invention.

As shown in FIGS. 1 and 2, in the printing plate processing apparatus of this embodiment, a mounting board 21 for mounting the printing plate 11 is mounted on a movable base 22 having wheels 23 attached to the lower surface thereof. Has been fixed.

A plate bending device 27 for bending the rear edge 13 of the printing plate 11 to a predetermined angle by a known mechanism is attached to the upper end portion (the rear edge 13 of the printing plate) of the mounting board 21. On the other hand, a perforator 28 for forming a notch or a hole of a predetermined shape in the gripping side edge 12 of the printing plate 11 or in the vicinity of the gripping side edge 12 by a known mechanism at a lower end portion (grip side edge 12 of the printing plate 11). And a plate positioning device 29. Further, the plate mounting board 21 has a substantially symmetrical structure, and one side thereof will be described below.

The plate positioning device 29 will be described with reference to FIG. The plate positioning device 29 is provided adjacent to the punch 28 described above (see FIG. 1). FIG.
As shown in (a) and (b), a support plate 67 is fixed to the plate mounting board 21, and a through hole 68 is formed penetrating both. A positioning pin 69 is movably fitted in the through hole 68. On the other hand, the support plate 67
An air cylinder 71 is mounted on the mounting bracket 70 by a mounting bracket 70, and the distal end of the piston rod 72 is connected to a positioning pin 69.

The tip of the positioning pin 69 is tapered. A pressing plate 201 as a plate pressing member for preventing the printing plate 11 from floating is fixed to the plate mounting board 21 by screws 202, and the pressing plate 201 is provided with a through hole 203 through which the positioning pin 69 passes. ing. Push
The plate 201 is located between the plate 11 and the plate 11 when the plate 11 is placed.
Some gaps are formed.

Therefore, when the air cylinder 71 operates,
The positioning pins 69 protrude from the plate mounting board 21,
It is inserted into the positioning hole of the printing plate 11 and penetrates through the through hole 203 of the holding plate 201. Thereby, the position of the printing plate 11 is fixed at an appropriate position.

[0015] If there is a positional deviation of the plate positioning hole and the through hole 68 of 11, i.e. the positioning pin 69, the tip of the positioning pin 69 is formed in a tapered shape, a slight gap by the plate 11 pressing plate 201 Is lifted through the positioning plate 69, so that the positioning plate 69 is moved by a slight gap in the process of inserting the positioning pin 69 into the positioning hole of the printing plate 11 and the through hole 203 of the holding plate 201, and the printing plate 11 is moved. Move to the proper position.

In the above-described plate positioning device 29, since the holding plate 201 having the through-hole 203 is provided, the plate 11 is prevented from floating when the positioning pin 69 is projected, and the plate 11 is positioned at 360 degrees with respect to the through-hole 203. There is a holding effect. In addition, since the tip of the positioning pin 69 is tapered, the printing plate 11 can be moved to an appropriate position even if there is a slight displacement between the positioning pin 69 and the positioning hole of the printing plate 11.

It is also possible to use a leaf spring as the holding plate 201.

In the above-described embodiment, the plate bending device 27 and the perforator 28 are mounted on the plate mounting board. However, the plate processing apparatus of the present invention is not limited to this. One equipped with either the bending device 27 or the perforator 28 may be used.

In the above embodiment, the positioning pins 6
Although the air cylinder 71 is used as a means for moving the 9 forward and backward, the invention is not limited to this, and the means 9 may be moved forward and backward by known means.

[0020]

According to the present invention, there is provided a printing plate positioning apparatus for forming a tip of a positioning pin into a tapered shape and preventing the printing plate from floating when the positioning pin is inserted into a positioning hole of the printing plate. A holding member is provided, and the plate holding member is
A through hole is formed through which the decision pin passes, and the printing plate is
A plate-like member that has a slight gap between it and the plate when placed
Therefore , the printing plate is prevented from being lifted up, and when the printing plate is displaced in the process of inserting the positioning pin into the positioning hole and the through hole of the printing plate holding member , the printing plate is properly positioned. Is moved and positioned.

[Brief description of the drawings]

FIG. 1 is a front view of a plate mounting board in a processing apparatus having a plate positioning device according to an embodiment of the present invention.

FIG. 2 is a side view of a plate processing apparatus.

FIG. 3 is a sectional view of a plate positioning device.

FIG. 4 is an explanatory view showing a conventional problem.

FIG. 5 is an explanatory diagram showing a conventional problem.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 11 printing plate 21 printing plate mounting board 22 frame 29 plate positioning device 71 air cylinder 69 positioning pin 201 holding plate 203 through hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A printing plate positioning apparatus having a positioning pin inserted into a positioning hole of a printing plate, wherein a tip of the positioning pin is tapered, and printing is performed when the positioning pin is inserted into the positioning hole. A printing plate holding member is provided to prevent the plate from lifting, and the printing plate holding member has a positioning pin.
When a through-hole is formed and the printing plate is placed
A plate-like member having a slight gap between the plate and the plate .