JPH0318183Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plate positioning device when attaching a plate to a plate cylinder of a printing press.

FIG. 1 shows a state in which a plate is mounted on a conventional plate cylinder. There are four plates 2a, 2b, 2c, 2d on the plate cylinder 1.
is installed. As shown in Fig. 2, marking lines 3 are marked on the surface of the plate cylinder 1 to indicate the axial position of the plates. Install it by visually aligning it with the marking line.

With this mounting method, the axial direction of the plate is positioned visually, and the position cannot be confirmed with any difficulty, making it impossible to achieve accurate plate mounting position. For this reason, test printing is performed and the position of the plate is adjusted based on the results, which increases print preparation time.

The present invention provides a plate cylinder having a groove in the axial direction on its surface and a plate mounting device in the groove.
The feature is that a backing plate is installed on the upper surface of the groove at a predetermined position in the axial direction, and its purpose is to eliminate the above-mentioned drawbacks of the conventional method, to position the plate in the axial direction with high precision, and to improve printing preparation. The present invention aims to provide a plate positioning device that can reduce time and improve alignment printing quality.

The present invention is constructed as described above, and when installing a plate, the side surfaces of both ends inserted into the groove of the plate are pressed against the abutment plate for axial positioning, and then the plate is tightened using a plate mounting device.

As described above, according to the present invention, since there is a feeling of pressing against the backing plate when installing the plate, the installation position can be determined easily and with high precision. It also reduces print preparation time and improves print quality.

The most preferred embodiments of the present invention shown in FIGS. 3 to 6 will now be described in detail.

Four plates 2 shown in FIG. 6 are attached to the plate cylinder 1 in the axial direction. The plate cylinder 1 has two grooves 5 formed in the axial direction on its surface, and a plate mounting device (not shown) for holding both ends of the plate 2 is provided in the grooves 5. One patch plate 4 is attached to each plate 2 at a predetermined position in the axial direction on the upper surface of the groove 5.

This embodiment is constructed as described above, and the installation of the plate will be explained. The left end of the plate 2 shown in FIG. 6 is hung on the upper right side of the groove 5 in FIG. 4, and the side of the plate 2 is placed against the backing plate 4 to determine its widthwise position.
Next, rotate the plate cylinder 1 and insert the other end of the plate 2 into the groove 5.
Stop the plate 2 at the position where it can be inserted into the groove 5, and insert the edge of the plate 2 into the groove 5.
Insert it as shown on the upper left side of the figure. Then, the side surface of the plate 2 is placed against the backing plate 4 to determine its position in the width direction. Next, the plate 2 is installed by the plate mounting device built into the groove 5.
Tighten and secure.

In this way, the clamping force of both ends of the plate according to this embodiment is unprecedentedly free and presses it against the backing plate to regulate the position of the plate in the axial direction, so it is responsive, easy to position, and has high precision. You can do it with Moreover, the time required to install the plate is shortened, the time required to prepare for printing can be shortened, and the efficiency of printing work can be improved.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing how the plate is attached to the plate cylinder;
Fig. 2 is a front view showing a conventional plate cylinder, Figs. 3 to 6 show an embodiment of the present invention, Fig. 3 is a front view thereof, and Fig. 4 is a cross section taken along line A-A in Fig. 3. 5 is a view from B in FIG. 4, and FIG. 6 is a perspective view showing the plate attached to the plate cylinder. 1... plate cylinder, 2... plate, 4... patch plate, 5...
groove.

Claims (1)

[Scope of utility model registration request] A plate cylinder having a groove formed in the axial direction on its surface and a plate mounting device in the groove, characterized in that a patch plate is installed on the upper surface of the groove at a predetermined position in the axial direction. Positioning device.