JPH0643756U - Feeding roller for magnetic cards - Google Patents

Abstract

(57) [Abstract] [Purpose] To suppress uneven rotation of a roller supported by a drive shaft and rotating integrally with the drive shaft without using a rubber ring having a special shape. [Structure] A concave portion 1 or a convex portion provided on a roller 2, a fitting portion 4 provided on a drive shaft 6 and fitted with a gap with the concave portion 1 or a convex portion, and fitting of the roller 2 to the fitting portion. At this time, a part of the elastic plate member 3 was press-fitted into the gap, the roller and the drive shaft were fitted together, and the annular elastic member was interposed in the gap.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feed roller for a magnetic card or the like.

[0002]

[Prior art]

 A magnetic card reader that sends information-recorded cards and deposit / savings passbooks (hereinafter referred to as "magnetic cards") employs a feeding mechanism for feeding magnetic cards and proposes various feeding mechanisms. Has been done.

In the feed mechanism, there is a type in which a plurality of feed rollers are arranged in a conveyance path of a magnetic card or the like, and the drive shaft is rotated from the drive motor by decelerating means by a gear train.

In particular, in the feed mechanism using such a reduction gear train, minute rotational unevenness in the gear train is transmitted from the drive shaft to the magnetic card or the like running through the feed roller, and as a result, information is transmitted. It is a factor that affects the reading of the and deteriorates the read jitter.

There is a technique disclosed in Japanese Utility Model Laid-Open No. 4-24152 for the purpose of eliminating such rotation unevenness. This technology uses a specially shaped rubber ring with a meshing recess formed in the joint.

[0006]

[Problems to be solved by the device]

 In the prior art, a rubber ring having a special shape is required as a means for eliminating the rotational unevenness of the feed roller. However, molded rubber has a large variation in processing accuracy, which causes a problem particularly in mass production.

Therefore, an object of the present invention is to provide a feed roller for a magnetic card or the like that can suppress uneven rotation without using a rubber ring having a special shape.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a roller supported by a drive shaft and rotating integrally with the drive shaft, wherein a recess or a protrusion provided on the roller and a recess or a protrusion provided on the drive shaft are provided. The roller and the drive shaft are configured so as to have a fitting portion that fits with the convex portion with a gap, and an annular elastic plate part of which is press-fitted into the gap when the roller is fitted into the fitting portion. And are fitted to each other, and an annular elastic body is interposed in the gap.

[0009]

[Action]

 The annular elastic plate deforms following the irregularities and exerts a cushioning function at the joint portion. The elastic plate does not need to have a complicated shape because it deforms following the unevenness.

[0010]

【Example】

 1. Configuration In this example, as shown in FIG. 1, a roller 2 having a concave portion 1, an annular elastic plate body 3, a shaft member 5 having a fitting portion 4 made of a convex portion, a drive shaft 6 and the like are used as a feed roller. Is configured.

Of these, a central hole through which the shaft 6 is inserted is formed in each of the central portions of the roller 2, the annular elastic body 3, and the shaft member 5. These central holes are sequentially indicated by the symbols H2, H3 and H5.

In FIG. 3, FIG. 3B is a sectional view taken along the line AA of FIG. As shown in FIG. 3, the roller 2 has a structure in which the outer circumference of a metal tubular body 2-1 is covered and adhered with a rubber tubular 2-2.

As shown in FIGS. 1 and 3, the recessed portion 1 is formed in a diametrical direction with a depth D1, a width W1 and a diameter W2 with a central hole H2 of the tubular body 2-1 interposed therebetween. ing. The center hole H2 is loosely fitted to the drive shaft 6 and has substantially the same diameter. Therefore, the roller 2 is rotatable with respect to the drive shaft 6 in the assembled state.

FIG. 4B shows a cross section taken along the line BB in FIG. 4A. As shown in FIG. 4, the shaft member 5 is integrally fixed to the drive shaft 6 in the assembled state, and the fitting portion 4 protrudes from the flange portion 5-1 toward the roller 2 side, and is fitted into the recess 1. On the other hand, they should be fitted with a gap. Therefore, the width w1 of the fitting portion 4 is smaller than the width W1 of the concave portion 1, and the diameter w2 is smaller than the diameter W2 of the concave portion.

The flange portion 5-1 is formed with two screw holes 5-2 and 5-3 radially from the center hole H5. These screw holes are for inserting the fixing screws 7 in order to integrally fix the shaft member 5 to the drive shaft 6.

The elastic plate body 3 is made of rubber and has a simple shape of an annular plate body. The outer diameter thereof is the same as the outer diameter w2 of the fitting portion 4. Since this elastic plate body 3 is to be press-fitted into the gap between the concave portion 1 and the fitting portion 4, its thickness is at least larger than (W1-w1) / 2. For example, if w1 = 2.6 mm and W1 = 1 mm, the thickness of the elastic plate body 3 is 1 mm.

2. Assembling Procedure In FIG. 2, FIG. 2A is a sectional view taken along the line CC of FIG. 2B (however, the drive shaft portion is excluded). As shown in FIG. 2A, the roller 2 is fitted on the drive shaft 6, and one end of the roller 2 is appropriately abutted against a locking portion 6a formed on the drive shaft 6 through a washer or the like. In this case, the roller 2 is rotatable with respect to the drive shaft.

The elastic plate body 3 is fitted to the drive shaft 6, then the shaft member 5 is fitted, and the position in the rotational direction is determined so that the fitting portion 4 fits in the concave portion 1 and the shaft member is directed toward the roller 2 side. Press. Then, the elastic member 3 is pressed and deformed by the fitting portion 4 and is deformed into a substantially Ω shape when viewed from the longitudinal direction of the recess 1 and is press-fitted into the gap between the recess 1 and the fitting portion 4. It

By this pressing, the elastic plate body 3 is clamped between the surface of the flange portion 5-1 and the surface of the cylindrical body 2-1 and fixed in the screw holes 5-1 and 5-2. The screw 7 is screwed in to fix the shaft member 5 integrally with the drive shaft 6. At this time, as shown in FIG. 2A, there is still a gap Δt between the elastic plate body 3 and the axial direction inside the recess 1.

FIG. 2B is a cross-sectional view taken along the line FF of FIG. 2A, and the cross section of the elastic plate body 3 press-fitted into the gap can be seen.

3. With such a configuration, the rotation torque of the drive shaft 6 connected to the drive source is transmitted to the roller 2 via the elastic plate body 3 interposed in the gap. Therefore, even if the drive shaft 6 rotates in the forward or reverse direction or uneven rotation occurs, the uneven rotation generated on the drive shaft is absorbed by the elastic plate body 3 as an intermediate cushioning material.

When such a configuration is applied to the magnetic card feeding mechanism, the rotation unevenness is not transmitted to the roller 2 because the roller 2 cannot follow the minute rotation unevenness of the fitting portion 4 integrated with the drive shaft 6. The read jitter can be improved.

[0023] 4. Modified Example In the above example, the shaft member 5 having the convex fitting portion is manufactured separately from the drive shaft 6, and the drive shaft 6 and the drive shaft are integrated with each other when assembled. It is also possible to form a fitting part.

Further, it is also possible to replace the portions where the irregularities are formed and to provide the roller with a convex portion and the drive shaft with a fitting portion formed of a concave portion. The convex portion can also be configured with a pin.

In the above example, the outer diameter of the elastic plate body is made to coincide with the outer diameter of the convex portion, but it is not always necessary. The point is that it should be press-fitted in the direction of rotation to exert a cushioning function.

5. FIG. 5 shows an example of a feeding mechanism of a magnetic card or the like to which the present invention is applied. The feeding mechanism is a reading unit 8 for pulling the card K into the mechanism and a reading unit for carrying out reading and writing of information on the card. The writing / writing unit 9 and driving means for driving the feed roller provided in each unit.

A drive motor 12 is fixed to the frame 10 of the frames 10 and 11 for guiding both edges of the card K. The output shaft of the motor 12 is provided with a gear G1, and the reduction gears G2 and G3 meshing with each other form a reduction gear train.

The gear G3 is fixed to a drive shaft 15 rotatably supported by the frames 10 and 11. The shaft 15 is provided with a feed roller that functions as a draw-in roller by the roller 2, the shaft member 5, and the like.

The timing pulley 13 is fixed to one end of the drive shaft 15. A timing belt 14 is wound around this pulley. The timing belt 14 is wound around a timing pulley 16 fixed to one end of the drive shaft 6.

The drive shaft 6 is provided with the roller 2, the shaft member 5 and the like, and is called a drive shaft in the sense of driving the roller. A pinch roller rotatably supported by a shaft (not shown) is in contact with the roller 2 provided on the drive shaft 6 so as to face upward.

Next to the roller 2, a read / write magnetic head 18 supported by a head support 17 is arranged. A not-illustrated patroller faces this head, and holds the relative position between the head and the card to be sent.

Although the roller that directly affects the reading jitter is provided on the drive shaft 6, it is possible to further improve the effect by providing the roller on the invocation side as in this example.

[0033]

[Effect of device]

 According to the present invention, it is possible to provide a feed roller for a magnetic card or the like that can suppress uneven rotation without using a rubber ring having a special shape.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a feed roller according to the present invention.

FIG. 2 is a sectional view of a main part of a feed roller according to the present invention.

FIG. 3 is an explanatory view of a roller according to the present invention.

FIG. 4 is an explanatory view of a fitting portion according to the present invention.

FIG. 5 is an explanatory view of a card feeding mechanism according to the present invention.

[Explanation of symbols]

 1 recessed part 2 roller 3 elastic plate body 4 fitting part 6 drive shaft

Claims (1)

[Scope of utility model registration request] 1. A roller supported by a drive shaft and rotating integrally with the drive shaft, wherein a recess or a protrusion provided on the roller and a recess provided on the drive shaft and fitted with a gap therebetween. When fitting the whole fitting part and the roller to the fitting part, the fitting part has an annular elastic plate part that is press-fitted into the gap, and fits the roller and the drive shaft, A feed roller for a magnetic card or the like, characterized in that an annular elastic body is interposed in the gap.