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US 9,421,754 B2Granted
Printing plate unit, printing plate attachment device and printer
OwnerMasayuki Izumeinventor
Life of this patent
Estimating the term…
Abstract
To attach a printing plate to a printer readily and accurately, and avoid necessity of a large space for the storage of the printing plate. A printing plate unit 1 includes a printing plate 3 in which a plate section 9 is provided on a part of a front surface of a sheet 8 made of an elastic material and engaging protrusions 10 that protrude toward a back surface and extend in a width direction are provided at both longitudinal ends, and a printing plate coupling member 4 that is detachable from the printing plate 3 and couples both the engaging protrusions 10 of the cylindrical printing plate 3 to each other to keep the cylindrical shape of the printing plate 3.
Claims19
A printing plate unit attached to a printing plate attachment device of a printer that includes a plate cylinder part, the printing plate unit comprising:
- a printing plate in which a plate section is provided on a part of a front surface of a sheet made of an elastic material, and engaging protrusions that protrude toward a back surface or a front surface and extend in a width direction are provided at longitudinal ends of the printing plate;
- and
- a printing plate coupling member that is detachable from the printing plate, and engages with the engaging protrusions of the printing plate which is formed to be cylindrical to couple the longitudinal ends of the cylindrical printing plate to each other,
- wherein the printing plate coupling member includes an inner clamping member and an outer clamping member that clamp the longitudinal ends of the cylindrical printing plate at radially inner and outer sides,
- wherein attachment and detachment of the printing plate unit to and from the plate cylinder part fixedly provided at a plate driving shaft of a printer is performed in a state in which the printing plate is kept cylindrical by the printing plate coupling unit, and in a state in which the printing plate unit is detached from the plate cylinder part, with the printing plate coupling member detachable from the printing plate and the printing plate storable in the form of a flat plate,
- wherein the printing plate coupling member includes screw members,
- wherein a plurality of threaded holes are formed in the inner clamping member, and screw-insertion through-holes corresponding to the threaded holes are formed in the outer clamping member,
- wherein the outer clamping member overlaps the inner clamping member and the ends of the printing plate at the radially outer side, and the screw members are inserted into the through-holes and screwed into the threaded holes, thereby being fixed to the inner clamping member, and
- wherein threaded hole-forming parts each having a predetermined thickness in the radial direction of the cylindrical printing plate are formed at a plurality of places of the inner clamping member,
- a threaded hole having a female screw penetrating each threaded hole-forming part in the radial direction is formed in each threaded hole-forming part,
- screw-insertion through holes that correspond to the threaded holes and penetrate the outer clamping member in the radial direction are formed at a plurality of places of the outer clamping member,
- a plurality of clamping screw members penetrate the screw-insertion through holes from the radially outer side and are screwed into the threaded holes,
- in the state where the inner and outer clamping members are fixed with the clamping screw members, a retaining stopper is provided at a part of the clamping screw member protruding from the threaded hole inward in the radial direction, the part being away from the threaded hole-forming part inward in the radial direction, and
- permanent magnets are provided at the inner and outer clamping members so as to repel each other.
11 more elements
A device for attaching a printing plate, in which a plate section is provided on a part of a front surface of a sheet made of an elastic material, and engaging protrusions that protrude toward a back surface or a front surface and extend in a width direction are provided at longitudinal ends of the printing plate, to a plate driving shaft of a printer, the device comprising:
- a printing plate coupling member that is detachable from the printing plate and engages with the engaging protrusions of the printing plate which is formed to be cylindrical to couple the longitudinal ends of the cylindrical printing plate to each other;
- and
- a cylindrical plate cylinder part that is fixedly provided at the plate driving shaft and has an outer periphery to which the cylindrical printing plate is attached from a front end of the plate driving shaft,
- wherein the plate cylinder part includes a printing plate coupling member storing groove that stores the printing plate coupling member to which the cylindrical printing plate is coupled from the front end of the plate driving shaft, an axial positioning stopper part that contacts a rear end of the printing plate coupling member, a printing plate coupling member guiding part that guides the printing plate coupling member to move in a predetermined range of the plate cylinder part in the radial direction, and a printing plate coupling member biasing device that biases the printing plate coupling member outward in the radial direction of the plate cylinder part,
- wherein the printing plate kept cylindrical by the printing plate coupling member is fitted onto the plate cylinder part from one end in a state in which the ends of the printing plate are fixed to the printing plate coupling member,
- wherein the printing plate coupling member storing groove is provided in a groove formation surface provided on the outer periphery of the plate cylinder part,
- wherein the printing plate coupling member includes an inner clamping member and an outer clamping member that clamp the longitudinal ends of the cylindrical printing plate at radially inner and outer sides,
- wherein the inner clamping member is a guided member guided to the printing plate coupling member guiding part when or after the printing plate coupling member is stored in the printing plate coupling member storing groove, and is biased outward in the radial direction of the plate cylinder part by the printing plate coupling member biasing device.
5 more elements
A device for attaching a printing plate, in which a plate section is provided on a part of a front surface of a sheet made of an elastic material, and engaging protrusions that protrude toward a back surface or a front surface and extend in a width direction are provided at longitudinal ends of the printing plate, to a plate driving shaft of a printer, the device comprising:
- a printing plate coupling member that is detachable from the printing plate and engages with the engaging protrusions of the printing plate which is formed to be cylindrical to couple the longitudinal ends of the cylindrical printing plate to each other;
- and
- a cylindrical plate cylinder part that is fixedly provided at the plate driving shaft and has an outer periphery to which the cylindrical printing plate is attached from the front end of the plate driving shaft,
- wherein the plate cylinder part includes a printing plate coupling member storing groove that stores the printing plate coupling member to which the cylindrical printing plate is coupled from the side of the front end of the plate driving shaft, a printing plate coupling member guiding part that guides the printing plate coupling member to move in a predetermined range of the plate cylinder part in the radial direction, and a printing plate coupling member biasing device that biases the printing plate coupling member outward in the radial direction of the plate cylinder part, and
- wherein the printing plate kept cylindrical by the printing plate coupling member is fitted onto the plate cylinder part from one end in a state in which the ends of the printing plate are fixed to the printing plate coupling member,
- wherein the printing plate coupling member includes an inner clamping member and an outer clamping member that clamp the longitudinal ends of the cylindrical printing plate at radially inner and outer sides, and
- wherein the inner clamping member is a guided member guided to the printing plate coupling member guiding part when or after the printing plate coupling member is stored in the printing plate coupling member storing groove, and is biased outward in the radial direction of the plate cylinder part by the printing plate coupling member biasing device.
4 more elements
Dependencies are inferred from the claim text.