Device of handling roller for passbook

Abstract

A passbook conveyance roller device comprises a conveyance roller and a pinch roller, which are arranged to be opposed to each other, to convey a passbook. The conveyance roller comprises an inner ring member connected to a drive shaft, a metallic outer ring member, and a rubber member fixed to, for example, an outer peripheral surface of the inner ring member and press fitted into an inner peripheral surface of the outer ring member to give elastic forces to the inner peripheral surface of the outer ring member in a plurality of positions, which are spaced circumferentially at predetermined intervals from one another and arranged in point symmetry. Both the inner ring member and the outer ring member are rotated through the elastic member when a load torque on the outer ring member is less than a set torque set by the elastic forces of the rubber member. Relative slip is generated between the inner peripheral surface of the outer ring member and the rubber member when a load torque on the outer ring member is equal to or larger than the set torque.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing a whole construction of a passbook printer, to which the invention is applied;

FIG. 2 is a side view showing a detailed structure of a conveyance roller, which constitutes a first embodiment of a passbook conveyance roller device according to the invention;

FIG. 3 is a cross sectional view of the conveyance roller taken along the line III-III in FIG. 2;

FIG. 4 is a graph representing a load torque of the conveyance roller, which constitutes the first embodiment of a passbook conveyance roller device according to the invention;

FIG. 5 is a view illustrating a computation model of a rubber member of the conveyance roller, which constitutes the first embodiment of a passbook conveyance roller device according to the invention;

FIG. 6 is a view illustrating a computation model of a rubber member of the conveyance roller, which constitutes the first embodiment of a passbook conveyance roller device according to the invention, and a state, in which relative slip is generated between outer peripheral side projections of a rubber member and an inner peripheral surface of an outer ring member;

FIG. 7 is a side view showing, as a modification, a detailed structure of the conveyance roller, which constitutes a first embodiment of a passbook conveyance roller device according to the invention;

FIG. 8 is a side view showing a detailed structure of a conveyance roller, which constitutes a second embodiment of a passbook conveyance roller device according to the invention;

FIG. 9 is a side, cross sectional view showing a detailed structure of a conveyance roller, which constitutes a third embodiment of a passbook conveyance roller device according to the invention; and

FIG. 10 is a side, cross sectional view showing, in a partially enlarged scale, a X part in FIG. 9.

Claims

1. A passbook conveyance roller device comprising a conveyance roller and a pinch roller, which are arranged to be opposed to each other, to convey a passbook-like article, and wherein the conveyance roller comprises an inner ring member connected to a drive shaft, a metallic outer ring member arranged on an outer peripheral side of the inner ring member, and torque limiter means comprising at least one elastic member fixed to one of an outer peripheral surface of the inner ring member and an inner peripheral surface of the outer ring member to give elastic forces to the other of the outer peripheral surface of the inner ring member and the inner peripheral surface of the outer ring member in a plurality of positions, which are spaced circumferentially at predetermined intervals from one another and arranged in point symmetry, the torque limiter means rotating both the inner ring member and the outer ring member through the elastic member or the like when a load torque on the outer ring member is less than a set torque set by the elastic forces of the elastic member, and generating relative slip between the elastic member and the other of the outer peripheral surface of the inner ring member and the inner peripheral surface of the outer ring member when a load torque on the outer ring member is equal to or larger than the set torque.

2. A passbook conveyance roller device according to claim 1, wherein the torque limiter means comprises the elastic member fixed to the outer peripheral surface of the inner ring member to have a plurality of outer peripheral side projections, which are spaced circumferentially at predetermined intervals from one another and formed in point symmetry, press fitted into the inner peripheral surface of the outer ring member, the torque limiter means rotating both the inner ring member and the outer ring member through the elastic member when a load torque on the outer ring member is less than a set torque set by the elastic forces of the plurality of outer peripheral side projections of the elastic member, and generating relative slip between the inner peripheral surface of the outer ring member and the outer peripheral side projections of the elastic member when a load torque on the outer ring member is equal to or larger than the set torque.

3. A passbook conveyance roller device according to claim 1, wherein the torque limiter means comprises the elastic member fixed to the inner peripheral surface of the outer ring member to have a plurality of inner peripheral side projections, which are spaced circumferentially at predetermined intervals from one another and formed in point symmetry, press fitted onto the outer peripheral surface of the inner ring member, the torque limiter means rotating both the inner ring member and the outer ring member through the elastic member when a load torque on the outer ring member is less than a set torque set by the elastic forces of the plurality of inner peripheral side projections of the elastic member, and generating relative slip between the outer peripheral surface of the inner ring member and the inner peripheral side projections of the elastic member when a load torque on the outer ring member is equal to or larger than the set torque.

4. A passbook conveyance roller device according to claim 1, wherein the torque limiter means comprises a plurality of slide members spaced circumferentially at predetermined intervals from one another and arranged in point symmetry to be slidable on the inner peripheral surface of the outer ring member, and the plurality of elastic members fixed to the outer peripheral surface of the inner ring member to give radially outwardly directed elastic forces to the plurality of slide members, respectively, the torque limiter means rotating both the inner ring member and the outer ring member through the elastic members and the slide members when a load torque on the outer ring member is less than a set torque set by the elastic forces of the plurality of the elastic members, and generating relative slip between the inner peripheral surface of the outer ring member and the slide members when a load torque on the outer ring member is equal to or larger than the set torque.

5. A passbook conveyance roller device according to any one of claims 1 to 4, wherein the outer ring member is provided on an outer peripheral surface thereof with a ceramic particle layer.