Plate for magnet cylinder

Abstract

A plate for a magnet cylinder includes a main body, a nonmagnetic portion, and a magnetic piece. The main body is formed of a flexible thin plate-like magnetic material to be magnetically mounted on the outer surface of a magnet cylinder. The nonmagnetic portion is projected from one end of the main body. The magnetic piece magnetically sandwiches the nonmagnetic portion against the outer surface of the magnet cylinder.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view showing a whole sheet-fed rotary printing press;

FIG. 2A is a plan view of a magnet cylinder according to the first embodiment of the present invention;

FIG. 2B is an enlarged view of a portion II(B) in FIG. 2A;

FIG. 3 is a sectional view taken along the line III-III of FIG. 2A;

FIG. 4A is an enlarged sectional view of the main part showing a state in which a reference pin retracts in the outer surface of the magnet cylinder;

FIG. 4B is an enlarged sectional view of the main part showing a state in which the reference pin projects from the outer surface of the magnet cylinder;

FIG. 5A is a perspective view of a plate to be mounted on the magnet cylinder shown in FIG. 2A;

FIG. 5B is a sectional view taken along the line V(B)-V(B) of FIG. 5A;

FIG. 6A is a perspective view of the magnet cylinder shown in FIG. 2A;

FIG. 6B is a view to explain plate mounting/discharge operation;

FIG. 7 is a plan view of the magnet cylinder shown in FIG. 2A;

FIG. 8 is a side view of the main part showing a state of mounting the plate on the magnet cylinder;

FIG. 9 is a side view of the main part showing a state of discharging the plate from the magnet cylinder;

FIGS. 10A and 10B are a perspective view and enlarged sectional view of the main part, respectively, of the magnet cylinder on which the plate is mounted;

FIG. 10C is an enlarged sectional view of the main part showing a state of removing the plate;

FIG. 11 is a plan view of a magnet cylinder according to the second embodiment of the present invention; and

FIG. 12 is a side view of the main part showing another example of the plate to be mounted on the magnet cylinder.

Claims

1. A plate for a magnet cylinder, comprising: a main body which is formed of a flexible thin plate-like magnetic material to be magnetically mounted on an outer surface of a magnet cylinder;a nonmagnetic portion which is projected from one end of said main body; anda magnetic piece which magnetically sandwiches said nonmagnetic portion against said outer surface of said magnet cylinder.

2. A plate according to claim 1, wherein said nonmagnetic portion is provided throughout an entire range of said one end of said main body in an axial direction of said magnet cylinder.

3. A plate according to claim 2, wherein said nonmagnetic portion is formed from a flexible thin plate-like resin member, and a portion which overlaps said main body bonds to an entire surface of said one end of said main body opposing to the outer surface of said magnet cylinder.

4. A plate according to claim 1, wherein said magnetic piece is formed of a band-like member made of a ferromagnetic material.

5. A plate according to claim 4, wherein a length of said magnetic piece in an axial direction of said magnet cylinder is set to be larger than a length of said nonmagnetic portion.