JP3054054U - Roller with rolling bearing - Google Patents

Abstract

(57) [Problem] To provide a roller with a rolling bearing that can improve the reliability of the rolling bearing and simplify the manufacturing process. A rolling bearing (2) includes an inner ring (22) and an outer ring (2).
1 and a plurality of balls 22 arranged between the two rings, and the roller body 3 is made of synthetic rubber,
The inner peripheral portion has a groove portion 31 having a bottom portion that is in close contact with the outer peripheral surface of the outer ring 21 and two side portions that are in close contact with the side surfaces of the outer ring 21.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a roller with a rolling bearing in which a roller is fitted to the outer ring of the rolling bearing, for example, a roller with a rolling bearing used as a driven roller of a pinch roller used when running a card-shaped recording medium. It is about.

[0002]

[Prior art]

 Conventionally, as a driven roller used in a medium traveling device that travels a medium, a roller with a rolling bearing in which an annular roller made of urethane rubber is adhered to the outer ring of a rolling bearing to stably travel without damaging the medium. Was used.

[0003]

[Problems to be solved by the invention]

 However, in the above roller with a rolling bearing, it is necessary to heat the entire rolling bearing to a temperature at which the urethane rubber softens, since thermoplastic polyurethane is molded into the rolling bearing to bond the urethane rubber and the outer ring. On the other hand, rolling bearings are internally provided with grease to reduce the coefficient of friction between the rolling elements and the outer and inner rings. As a result, there is a problem that the properties of the grease are deteriorated due to the heat generated during the molding, and the reliability of the rolling bearing is impaired. On the other hand, if the temperature at the time of molding is reduced to prevent the influence of heat on the grease, there have been problems that the molding process becomes uneven and the usable materials are limited.

In addition, after molding, it is necessary to grind three surfaces of both ends and an outer peripheral portion in the central axis direction of the roller for each roller with a rolling bearing to form a predetermined shape, which complicates the manufacturing process, There was also the problem of increasing product costs.

An object of the present invention is to provide a roller with a rolling bearing that can improve the reliability of the rolling bearing and simplify the manufacturing process.

[0006]

[Means for Solving the Problems]

 The roller with a rolling bearing according to the present invention includes a rolling bearing including a raceway including an inner ring and an outer ring, and a plurality of rolling elements disposed between the two rings; And a roller body provided on the inner peripheral portion with a groove having two side portions that are in close contact with at least a part of the side surface of the outer ring.

[0007] It is preferable that a joint portion between a bottom portion and a side portion of the groove portion of the roller body has a curved surface along a curved surface of a joint portion between an outer peripheral surface and a side surface of the outer ring.

Further, it is preferable that the groove of the roller body and the outer ring of the rolling bearing come into close contact with each other by an interference fit.

[0009]

[Embodiment of the invention]

 Hereinafter, a roller with a rolling bearing according to an embodiment of the present invention will be described with reference to the drawings. 1A and 1B are a side sectional view and a front view of a rolling shaft receiving roller according to an embodiment of the present invention.

As shown in FIGS. 1A and 1B, a roller 1 with a rolling bearing includes a rolling bearing 2 and a roller body 3. The rolling bearing 2 includes an outer ring 21, an inner ring 22, and a plurality of balls (rolling elements) 23 arranged between the outer ring 21 and the inner ring 22.

The rolling bearing 2 is not particularly limited as long as it has a rolling element inside, and a deep groove ball bearing, an angular ball bearing, a self-aligning ball bearing, a cylindrical roller bearing, a tapered roller bearing, or the like is used. In the present embodiment, 696ZZ manufactured by NSK Ltd. is used as an example. In this example, the inner diameter of the rolling bearing 2 is 6 mm, the outer diameter is 15 mm, and the width is 5 mm.

A groove 31 is provided in the inner peripheral portion of the roller body 3, and the groove 31 is formed of a bottom portion in close contact with the outer peripheral surface of the outer ring 21 and two side portions in close contact with at least a part of the side surface of the outer ring 21. The joint between the bottom and the side of the groove 31 has a curved surface that follows the chamfered curved surface of the joint between the outer peripheral surface and the side surface of the outer race 21. Accordingly, the entire groove 31 of the roller body 3 can be used as a fitting surface to the outer ring 21, and the roller body 3 can be more firmly fixed to the outer ring 21, and the bottom of the groove 31 of the roller body 3 can be used. Further, it is possible to prevent the occurrence of cracks or the like due to excessive stress acting on the joints at the side portions, and to improve the durability of the roller body 3.

The shape of the groove 31 is the same as or slightly smaller than the outer shape of the outer ring 21 so that the roller body 3 does not run idle with respect to the rolling bearing 2, and basically, the space between the two is tightly fitted. Preferably, the interference is determined according to the application and the material. The depth of the groove 31 may be such that the side of the groove is tightly attached to at least a part of the side surface of the outer race 21 and the movement of the roller body 3 in the central axis direction with respect to the rolling bearing 2 can be prevented. In the present embodiment, the depth is about 1 mm, and the side of the groove almost covers the entire side surface of the outer ring 21.

The material of the roller body 3 includes butadiene, styrene-butadiene, diene such as chloroprene, butadiene-acrylonitrile, isobutylene-isoprene, ethylene-propylene, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin, and organosilicon. Compound-based, fluorine-containing compound-based, urethane-based, vinyl-based non-diene-based, styrene-based, olefin-based, ester-based, urethane-based thermoplastic rubbers and the like can be used. Urethane rubber having a Shore A hardness of 90 ° ± 5 ° is used.

The operation of fitting the roller body 3 to the rolling bearing 2 is performed by first rolling the roller body 3 inside the roller body 3 such that the center axis of the roller body 3 is orthogonal to the center axis of the rolling bearing 2. This can be done by fitting the bearing 2 and then rolling the rolling bearing 2 90 degrees in the roller body 3. In this case, since the roller body 3 is made of synthetic rubber and has an appropriate elasticity, the above operation can be easily performed. Accordingly, the entire groove 31 of the roller main body 3 is brought into close contact with the outer peripheral surface and the side surface of the outer ring of the rolling bearing by merely fitting the outer ring of the rolling bearing 2 by using the elasticity of the synthetic rubber to fit the outer ring 21. The roller body 3 can be fixed. As a result, since the rolling bearing 2 and the roller body 3 can be manufactured separately, the grease is not deteriorated by heating the rolling bearing 2, and the reliability of the rolling bearing can be improved. At the same time, the manufacturing process is simplified, and the manufacturing cost can be reduced. For example, a plurality of roller bodies can be collectively processed, finished, etc., and then cut individually. In addition, when discarding the roller receiving roller after use, it can be easily separated into the rolling bearing, which is a metal part, and the roller, which is a rubber part. And become suitable for recycling.

Next, a unit ticket issuing machine will be described as an example of a use state of the roller with a rolling bearing shown in FIG. FIG. 2 is a perspective view schematically showing a traveling section of a unit ticket of the unit ticket issuing machine using the roller with the roller bearing shown in FIG. Note that this use example is merely an example, and the roller with a rolling bearing of the present invention can be similarly used for other medium traveling devices and the like.

As shown in FIG. 2, two roller bearing-equipped rollers 1 are coaxially arranged on a traveling portion of the unit ticket issuing machine above a driving roller 11 driven by a driving means (not shown). The roller 1 with the rolling bearing disposed is urged in the direction of the drive roller 11 by urging means (not shown). In this state, when a unit ticket 12, which is a card-shaped medium, is inserted between the drive roller 11 and the roller 1 with a rolling bearing, which is a driven roller, the drive roller 11 rotates, and the unit ticket 12 is rotated. However, it runs between the roller 1 with the bearing. In this case, since the urethane rubber is provided on the outer periphery of the roller 1 with the rolling bearing, the unit ticket 12 can run at a predetermined speed accurately following the rotation of the driving roller 11. In addition, the run-out of the outer periphery of the rolling shaft receiving roller 1 during rotation is processed to be 0.05 mm or less.

Next, another embodiment of the roller with a rolling bearing of the present invention will be described. FIG. 3 is a side sectional view showing the configuration of another embodiment of the roller with a rolling bearing of the present invention. The difference between the roller with a roller bearing shown in FIG. 3 and the roller with a roller bearing shown in FIG. 1 is that a peripheral groove 41 having a substantially semicircular cross section is added to the outer periphery of the roller body 4. The points are the same as those of the roller with a rolling bearing shown in FIG. 1, and therefore detailed description is omitted. In this case, by winding the belt around the circumferential groove 41, the belt can be used as a driven pulley. Further, a plurality of the above circumferential grooves may be provided and used as an intermediate pulley.

Next, still another embodiment of the roller with a rolling bearing of the present invention will be described. FIG. 4 is a side sectional view showing the configuration of still another embodiment of the roller with a rolling bearing of the present invention. The difference between the roller with a roller bearing shown in FIG. 4 and the roller with a roller bearing shown in FIG. 1 is that two roller bearings 2 are arranged in series, and one roller body 5 is fitted on the outer periphery of these two. The other points are the same as those of the roller with the rolling bearing shown in FIG. 1, and thus detailed description is omitted. In this case, the driven roller can be used as a wide driven roller, and a driven roller having a desired width can be provided by further increasing the number of rolling bearings.

The above embodiments are merely examples, and the shape of the roller can be variously modified and used for various applications. For example, if the roller is processed into a gear shape, the driven It can also be used as a gear.

[0021]

[Effect of the invention]

 The roller with a rolling bearing of the present invention uses the elasticity of synthetic rubber to fit the roller body separately processed from the rolling bearing to the outer ring of the rolling bearing, and the entire groove of the roller body covers the outer ring of the rolling bearing. The roller body can be fixed to the outer ring by closely contacting the outer peripheral surface and the side surface of the roller. Therefore, since the rolling bearing is not heated, the grease is not deteriorated, the reliability of the rolling bearing can be improved, and the roller body can be processed separately from the rolling bearing. It can be simplified and the manufacturing cost can be reduced. In addition, the roller with the rolling bearing after use can be easily separated into the rolling bearing and the roller, so that disassembly and disposal can be easily performed, making the roller suitable for recycling.

In the case where the joint between the bottom and the side of the groove of the roller body has a curved surface that follows the curved surface of the joint between the outer peripheral surface and the side surface of the outer ring, the entire groove of the roller body is connected to the outer ring. It can be used as a fitting surface, can further improve the fixing force of the roller body to the outer ring, and can prevent the occurrence of excessive stress at the joint between the bottom and the side of the groove. The durability of the main body can also be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view and a front view of a roller with a rolling bearing according to an embodiment of the present invention.

FIG. 2 is a perspective view schematically showing a traveling section of a unit ticket of a unit ticket issuing machine using the roller with a roller bearing shown in FIG. 1;

FIG. 3 is a side sectional view of a roller with a rolling bearing according to another embodiment of the present invention.

FIG. 4 is a side sectional view of a roller with a rolling bearing according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller with a rolling bearing 2 Rolling bearing 3-5 Roller body 21 Outer ring 22 Inner ring 23 Ball 31 Groove part 41 Peripheral groove

Claims (3)

[Utility model registration claims] 1. A rolling bearing comprising: a raceway comprising an inner race and an outer race; and a plurality of rolling elements disposed between the two races; A roller body provided with a groove on an inner peripheral portion having two side portions each in close contact with at least a part of a side surface. 2. The roller with a rolling bearing according to claim 1, wherein the joint between the bottom and the side of the groove of the roller body has a curved surface that follows the curved surface of the joint between the outer peripheral surface and the side surface of the outer ring. 3. The roller with a rolling bearing according to claim 1, wherein the groove of the roller body and the outer ring of the rolling bearing are tightly fitted with each other by an interference fit.