Plate guide device

Abstract

A plate guide device includes a magnet cylinder and guide plate. A plate is to be mounted magnetically on the outer surface of the magnet cylinder. The guide plate guides the plate removed from 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 guide device comprising: a magnet cylinder with an outer surface on which a plate is to be mounted magnetically; andguide means for guiding said plate removed from said magnet cylinder.

2. A device according to claim 1, wherein said guide means guides said plate which is removed from said outer surface of said magnet cylinder and discharged when said magnet cylinder rotates.

3. A device according to claim 2, wherein said guide means comprises a guide member with an end which is close to said outer surface of said magnet cylinder, andsaid end of said guide member removes said plate from said outer surface of said magnet cylinder.

4. A device according to claim 3, wherein said guide member guides said plate removed by said end of said guide member, on a plane which substantially coincides with a plane which comes into contact with a removing portion of said plate on said outer surface of said magnet cylinder.

5. A device according to claim 3, wherein said guide member comprises a guide plate which has a guide surface.

6. A device according to claim 5, wherein said guide surface of said guide plate substantially coincides with a plane which comes into contact with a removing portion of said plate on said outer surface of said magnet cylinder.

7. A device according to claim 5, wherein said end of said guide plate is formed into a wedge-like shape, and becomes thinner as said end is closer to said outer surface of said magnet cylinder.

8. A device according to claim 7, wherein an angle of said end of said guide plate is set to an acute angle, andsaid guide surface of said guide plate comprises a plane continuous to a distal end of said end of said guide surface.

9. A device according to claim 3, wherein said guide member guides a new plate to be mounted to said outer surface of said magnet cylinder.

10. A device according to claim 3, wherein said plate comprises a main body which is formed of a flexible thin plate-like magnetic metal member to be magnetically mounted on said outer surface of said magnet cylinder, a nonmagnetic portion which is projected from one end of said main body, and a magnetic piece which is magnetically held by said outer surface of said magnet cylinder through said nonmagnetic portion to sandwich said nonmagnetic portion against said outer surface of said magnet cylinder,said end of said guide member is positioned between said outer surface of said magnet cylinder and said end of said nonmagnetic portion which is separated from said outer surface of said magnet cylinder from which said magnetic piece is removed, andsaid guide member guides, in a discharging direction, said plate on which said main body is sequentially removed from said outer surface of said magnet cylinder, when said magnet cylinder rotates in the discharging direction.

11. A device according to claim 1, wherein said guide means comprises a guide plate which guides said plate discharged from said magnet cylinder, anda length (width W2) of said guide plate in an axial direction of said magnet cylinder is set to be not less than a width W of said plate.

12. A device according to claim 1, wherein said guide means comprises a guide plate which guides said plate discharged from said magnet cylinder, andfurther comprises a plurality of guide pieces which line up in an axial direction of said magnet cylinder, said guide plate being attached on parts of said guide pieces,each of said guide pieces having a guide portion at an upper end to link to a guide surface of said guide plate.

13. A plate guide device comprising: removing means for removing a plate magnetically mounted on an outer surface of a magnet cylinder; andguide means for guiding said plate which is removed from said outer surface of said magnet cylinder by said removing means and discharged when said magnet cylinder rotates.

14. A device according to claim 13, wherein said guide means comprises a guide plate which guides said plate discharged from said magnet cylinder, andsaid removing means comprises a wedge-like end of said guide plate which is close to said outer surface of said magnet cylinder.