JP2912607B1 - Transport roller - Google Patents

Abstract

An object of the present invention is to provide a highly versatile transport roller that increases the rigidity of a roller bearing portion, prevents deformation due to its own weight and heat, maintains a high degree of roller runout, and reduces production costs. SOLUTION: A press-fitting portion 4 having flange-shaped protrusions 4a, 4b, 4c formed on a periphery thereof through a plurality of grooves in an axial direction,
A concentric press-fit bearing body 3 integrally formed with a bearing portion 5 extending concentrically from the press-fit portion 4 is press-fitted from the press-fit portion 4 through both side openings 2a of the cylindrical pipe 2 to form the flange. The cylindrical pipe 2 is formed by the outer periphery of the cylindrical projections 4a, 4b, 4c.
Is press-fitted in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentric press-fit bearing body in which a bearing portion extending concentrically from a press-fit portion having a shaft hole is integrally formed, and the concentric press-fit bearing body is provided at both side openings of a cylindrical pipe. The present invention relates to a transport roller formed by press-fitting.

[0002]

2. Description of the Related Art Conventionally, OA equipment such as a copying machine, a facsimile, a printer and the like are equipped with a sheet conveying device such as a paper feed mechanism. The sheet conveying device is provided with a plurality of conveying roller pairs, and the conveying roller pairs are driven by a driving roller that is driven to rotate by being transmitted with a driving force, and a driven roller that is pressed against the driving roller and driven to rotate. It is configured. The roller on the driving side of the transport roller pair generally functions as a platen, and thus is generally a highly rigid cylindrical metal roller (steel, stainless steel,
For example, a material obtained by baking rubber on the peripheral surface of a material such as aluminum, a material coated with a resin, or a material subjected to a primer treatment is used. As the driven-side roller, a roller made of various materials such as metal, rubber, and resin is used, and not limited to a columnar roller, a roller having a disk shape or a spur type may be used.

[0003] As an example of the configuration of the above metal roller, for example, as shown in FIG.
After passing through the cylindrical pipe 5, the annular bush 53 is inserted through the openings on both sides using the rotary shaft 52 as a guide.
The bush 53 is press-fitted from the openings at both ends of the cylindrical pipe 51, and the assembly is assembled. The bush 53 is formed with a not-shown interruption (slit) in the radial direction to prevent deformation when the bush 53 is pressed into the cylindrical pipe 51 along the rotation shaft 52. The outer diameter of the cylindrical pipe 51 is polished on the basis of both sides to finish the pipe. The surface of the metal roller finished with the above outer diameter dimension was subjected to electroless nickel plating to prevent corrosion.

[0004] The other metal roller is previously subjected to electroless nickel plating on the surface of each of the cylindrical pipe 51, the rotating shaft 52, and the bush 53, and then the bush 53,
A shaft formed by driving one end of the left and right rotation shafts 52, 52 into shaft holes of 53 is connected to a cylindrical pipe 51 by a bush 5.
With 3 as the head, it is assembled by press-fitting from both side openings. Finally, the outer diameter of the cylindrical pipe 51 is polished in the longitudinal direction with reference to both ends of the rotating shaft 52 to finish the finishing. Alternatively, the metal roller is assembled by press-fitting the shaft into the openings on both sides of the cylindrical pipe 51 without previously plating the components, and then electroless nickel plating is applied to the surface. Thereafter, the roller surface had been subjected to a coating treatment such as applying a primer treatment and baking paint or spraying a resin.

[0005]

In recent years, in OA equipment, not only black and white but also colorized high-quality input images have been developed.
A so-called office color solution in which image processing is performed to output high image quality is performed. For this reason, it is desired to form high-quality images even on sheet materials of various sizes. Therefore, in the sheet conveying apparatus, a relatively small and light roller having a roller diameter of φ23 mm and an axial roller width of about 325 mm is a relatively large diameter of a roller diameter of φ32 mm and an axial roller width of about 423 mm. A certain transport roller is used, and it is desired that all the transport rollers have improved quality characteristics. That is, the accuracy of the runout of the roller outer periphery in units of microns is required. The influence of the roller run-out on the transport performance cannot be ignored, and in the case of a paper feed mechanism, there is a possibility that the skew of the sheet or the density of the recorded image will appear.

Particularly, in the case of a transport roller having a relatively large diameter and a weight of about 560 g or more, if the rotating shafts 52 extending from both ends of the cylindrical pipe 51 are supported by bearings (not shown), the rotating Since the rigidity of the shaft 52 in the vicinity of the bearing portion is weak, the roller tends to bend or oscillate on the outer periphery due to its own weight, and the sheet conveying performance is reduced. This has a greater effect on sheet conveyance for a larger conveyance roller. Further, there are also restrictions on the bearing positions for supporting the rotary shaft 52, and it is difficult to design a transport roller with high transport accuracy according to various device forms. Further, the increase in the number of assembling steps of the transport roller reduces productivity and increases manufacturing cost.

[0007] Further, a conventional conveying roller is a bush 53.
Is fitted so as to be in pressure contact with the cylindrical pipe 51 and the entire peripheral surface thereof, so that the structure is easily affected by distortion of the press-fitting surface. When the roller is heated, the cylindrical pipe 51 expands and distortion or loosening easily occurs between components. Further, when the bush 53 is press-fitted into the openings on both sides of the cylindrical pipe 51, metal shavings sandwiched between the inner wall at the opening end side of the cylindrical pipe 51 and the press-fitting surface of the bush 53 fall, In some cases, metal shavings were scattered in the rollers and leaked to the outside, thereby soiling the equipment. Further, the plating solution leaks out from the inside of the cylindrical pipe 51, and the transfer time to the next plating tank is extended to reduce the workability, or the residual plating solution in the cylindrical pipe 51 causes rust generation. Becomes

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, increase the rigidity of a roller bearing, prevent deformation due to its own weight or heat, and maintain a high degree of roller runout accuracy.
An object of the present invention is to provide a highly versatile transport roller with reduced production cost.

[0009]

The present invention has the following arrangement to achieve the above object. That is, the shaft extends coaxially from the press-fitted portion in which the shaft hole is formed, and the large-diameter portion and the small-diameter portion extend in the extending direction.
A metal concentric press-fit bearing body integrally formed with a bearing portion in which a diameter portion is continuously formed via a tapered portion, and the press-fit portions are respectively formed through openings on both sides of a metal cylindrical pipe. Press-fitting, the outer peripheral surface of the cylindrical pipe is coated
The bearing portion is formed so as to be able to pivot at a large diameter portion.

The bearing may have a large-diameter portion and a small-diameter portion continuously formed in the extending direction via a tapered portion, and a ring-shaped bearing may be fitted into the large-diameter portion. good. Further, the tapered portion may be formed on an inclined surface following the holding surface of the polishing jig, and a ring-shaped bearing provided with a side pressure spring on an outer surface may be fitted into the inclined surface. Further, a drive transmission gear may be fitted into the small diameter portion, and the cylindrical pipe is polished to an outer diameter with reference to both tapered portions of the bearing portion held by a polishing jig. Preferably, after the outer periphery is subjected to metal plating, a coating treatment may be applied.
Further, a rotary shaft may be fitted in one or both of the shaft holes of the concentric press-fit bearing bodies fitted in both side openings of the cylindrical pipe.

[0011] The press-fitting portion may have a plurality of flange-shaped protrusions formed on the outer periphery thereof through grooves, and the outer periphery of the flange-shaped protrusion has an open end to the cylindrical pipe. Each of the tapered surfaces may be formed such that the outer diameter increases toward the side. In addition, it is preferable that an inclined surface that is inclined so as to be depressed toward the shaft hole formed in the center portion is formed on an end face in the press-fit direction in the press-fit direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, a driving-side metal roller used as a part of a paper feed mechanism in an OA device such as a printer will be described as an example of a transport roller. 1 is a partially cutaway sectional view showing the configuration of a transport roller, FIG. 2 is a partially cutaway sectional view of a concentric press-fit bearing body, FIG. 3 is a cross-sectional view of a cylindrical pipe, and FIG. Explanatory diagram showing a state where a bearing body is fitted,
FIG. 5 is an explanatory view showing a state in which a conveying roller is set on a polishing jig, FIG. 6 is an explanatory view showing a state in which a cylindrical pipe is polished to an outer diameter, and FIGS. 7A to 7C are peripheral surfaces of a bearing portion. FIG. 8 is an explanatory view showing a state in which various ring-shaped bearings are fitted into the bearing, FIG. 8 is an explanatory view showing a state in which a drive transmission gear is fitted in the bearing portion, and FIG. FIG. 10 is an explanatory view showing a fitted state, and FIG. 10 is an explanatory view showing a state in which a rotating shaft is fitted to both of the concentric press-fit bearing bodies on both sides.

First, FIG. 1 shows the overall configuration of a transport roller.
This will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a transport roller, which is assembled from the following components. Reference numeral 2 denotes a cylindrical pipe, and a metal pipe such as steel, stainless steel, or aluminum is used. The outer surface of the cylindrical pipe 2 is coated with a coating such as baking rubber (not shown), spraying a resin, or applying a coating by a primer treatment. The surface treatment has been applied to obtain a sufficient amount. 3 is a concentric press-fit bearing body,
The cylindrical pipe 2 is mounted by press-fitting from both side openings 2a. The concentric press-fit bearing body 3 includes a press-fit portion 4 having a plurality of flange-shaped protrusions 4a to 4c formed on an outer periphery thereof through grooves in an axial direction, and a bearing portion extending concentrically from the press-fit portion 4. 5 are integrally formed. The concentric press-fit bearing body 3
From the press-fitting portion 4 to both side openings 2a of the cylindrical pipe 2
Each of the cylindrical pipes 2 is press-fitted in the radial direction by the outer periphery of the plurality of flange-shaped protrusions 4a to 4c. The concentric press-fit bearing body 3 is made of a metal material such as steel, stainless steel, or aluminum, similarly to the cylindrical pipe 2.

Next, the configuration of each component of the transport roller 1 will be specifically described with reference to FIGS. In FIG. 3, press-fit guide portions 2 b are formed on the inner periphery of the cylindrical pipe 2 on both sides of the opening 2 a, respectively, and serve as guide surfaces for press-fitting the concentric press-fit bearing body 3. The cylindrical pipe 2 is formed with step walls 2c on the back side of the openings 2a on both sides thereof.
When fitting into the opening 2a, the inner end surface of the press-fitting portion 4 does not abut against the step wall 2c, and a relief is formed. In the concentric press-fit bearing 3, the press-fit amount is regulated by the flange portion 4d formed in the press-fit portion 4 being in contact with the opening end face. The diameter of the press-fitting guide portion 2b may be substantially equal to the maximum diameter of the press-fitting portion 4, or may be tapered so as to follow the outer peripheral surfaces of flange-shaped protrusions 4a to 4c having different outer diameters described later. It may be formed on the surface.

The press-fitting guide portion 2b and the step wall 2c connected to the press-fitting guide portion 2b are subjected to grinding of the inside diameter by holding the cylindrical pipe 2 on a jig of an NC automatic machine, and a cutting edge of a cutting tool is inserted from both side openings 2a to a predetermined position. Cutting is performed based on the outer diameter of the cylindrical pipe 2 so that the inner wall L2 has an inner diameter L1 and a predetermined step. In addition, this cutting process is performed on the cylindrical pipe 2.
May be performed simultaneously from both side openings 2a, or may be performed one by one by inverting the cylindrical pipe 2 by 180 °.

Next, the configuration of the concentric press-fit bearing body 3 will be described with reference to FIG. On the outer periphery of the press-fitting portion 4 constituting the concentric press-fitting bearing body 3, flange-shaped protrusions 4 a, 4 b, 4 c are provided at a plurality of positions (three in the present embodiment) via grooves in the axial direction.
Are formed respectively. The flange-shaped protrusions 4a, 4
The outer diameters d of the b and 4c are set such that the press-fitting operation of the press-fitting portion 4 is performed smoothly and a sufficient tightening force is obtained. Each of the tapered surfaces is formed such that d becomes larger (d1 <d2 <d3). The tapered surface may have a slope such that the outer periphery of each flange-shaped protrusion is continuous, or may have a unique slope for each flange-shaped protrusion.

When the press-fitting portion 4 is press-fitted into the cylindrical pipe 2 by providing the plurality of flange-shaped protrusions 4a, 4b, 4c, the cylindrical pipe 2 is press-fitted by the flange-shaped protrusions 4a, 4b, 4c. Press-fitting with the guide portion 2b is strengthened. The groove between the flange-shaped protrusions 4a, 4b, 4c serves to accommodate metal shavings generated by slidingly contacting the press-fitting guide 2b when the press-fitting part 4 is press-fitted into the cylindrical pipe 2. Fulfill. The location of the flange-shaped protrusion in the axial direction can be changed for each product, and the width of the outer circumference of the flange-shaped protrusion serving as a tightening margin can be arbitrarily set.

A flange 4d is formed on the periphery of the rear end side of the press-fitting portion 4 in the press-fitting direction. The flange portion 4 d regulates a press-fitting range in the axial direction when the press-fit portion 4 is press-fitted into the cylindrical pipe 2. Further, an inclined surface 4f that is inclined so as to be depressed toward a shaft hole 4e formed in the center portion is formed on the end face in the press-fit direction in the press-fit portion 4 in the press-fit direction. This makes it easy for the plating solution to escape from the shaft hole 4e in the metal plating step described later, so that the plating solution does not remain inside the roller.

A large-diameter portion 6 and a small-diameter portion 8 are formed in the bearing portion 5 extending concentrically from the press-fit portion 4 in the extending direction via a tapered portion 7. Large diameter section 6
Let D1 be the outside diameter of D1 and D2 be the outside diameter of the small diameter portion 8. D1> D
2. The opening angle (center angle) α of the tapered portion 7 is formed at, for example, 60 ° in accordance with the opening angle of the holding surface of the polishing jig 10 described later. A shaft hole 5a formed in the bearing portion 5
The (hole diameter D3) communicates with a shaft hole 4e formed in the press-fit portion 4. As will be described later, various ring-shaped bearings can be attached to the large diameter portion of the bearing portion 5, that is, the large diameter portion 6 and the tapered portion 7. By supporting the transport roller 1 at a large diameter portion having a high rigidity, the strength of the bearing portion 5 is increased, and even when a large transport roller having a weight of about 560 g or more is manufactured, bending may occur due to its own weight. In addition, it is possible to prevent the outer periphery from oscillating. The concentric press-fit bearing body 3 is one-chucked to a jig of an NC automatic machine, and has flange-shaped protrusions 4a, 4b, 4c and a shaft hole 4e on the press-fit portion 4 side, a large diameter portion 6 of the bearing portion 5, a taper. The portions corresponding to the portion 7, the small diameter portion 8, and the shaft hole 5a are formed by cutting at the same time. As a result, the runout of the outer periphery of the roller can be finished with high accuracy.

Next, a description will be given of an assembling structure of the transport roller. In FIG. 4, a cylindrical pipe 2 that has been ground in advance is fixed to a jig (not shown), and the concentric press-fit bearing body 3 that has been precision-cut is inserted into the press-fit portion from both side openings 2 a of the cylindrical pipe 2. The transport roller 1 is assembled by press-fitting with the press-fitting jig 9 starting from 4. At this time,
The concentric press-fit bearing body 3 includes the flange-shaped protrusions 4a, 4b,
By 4c, the press-fitting with the press-fitting guide portion 2b is firmly performed. In addition, flange-shaped projections 4a, 4b,
The metal shavings 4c generated when press-fitting while slidingly contacting the press-fitting guide portion 2b are used to remove the metal shavings from the flange-shaped protrusions 4a, 4b, 4
The flange portion 4d is fitted into each groove between the holes c until the flange portion 4d hits the opening end.

Next, as shown in FIG. 5, the tapered portion 7 of the left and right concentric press-fit bearing body 3 having an opening angle of 60 ° is held on the polishing jig 10 with the bearing as a reference, and the outer periphery of the cylindrical pipe 2 is The diameter is polished by a grinding machine with a tolerance of ± 0.01 μm (broken line in FIG. 6). Thus, the cylindrical pipe 2
The concentric press-fit bearing body 3 is press-fitted into both side openings 2a of the
By polishing the outer diameter of the cylindrical pipe 2 with reference to the tapered portion 7, the runout accuracy of the outer periphery of the roller can be finished to a high precision of the order of microns.

Next, electroless nickel plating is applied to the entire surface to prevent corrosion of the roller. Next, a coating process is performed by spraying a resin on the outer periphery of the plated cylindrical pipe 2 or performing baking, thereby completing the transport roller 1. The transport roller 1 is suitably used as a relatively large high-precision transport roller weighing approximately 560 g to 960 g.

According to the above configuration, the rigid concentric press-fit bearing body 3 is fitted into the opening 2a on both sides of the cylindrical pipe 2 and is supported by a large diameter portion of the bearing part 5 to thereby support the bearing part 5.
Of the roller can be increased, the transport performance can be maintained with high precision without bending of the roller at the center portion or deflection of the outer periphery due to its own weight, and the manufacturing cost can be reduced because the number of parts and the number of assembly steps are small.

Further, the press-fitting portion 4 having a plurality of flange-shaped protrusions 4a, 4b, 4c formed on the outer periphery thereof in the axial direction through grooves.
Are press-fitted from both side openings 2 a of the cylindrical pipe 2, and the concentric press-fit bearing body 3 is firmly press-fitted into the cylindrical pipe 2 in a radial direction with a small contact area. The surface is hardly affected by the distortion, and the outer diameter of the cylindrical pipe 2 is polished with reference to the tapered portion 7 of the bearing portion 5 held by the polishing jig 10 so that the runout accuracy of the roller outer periphery can be improved. It can be finished with a high precision of the order of microns.

When press-fitting the concentric press-fit bearing body 3 into the cylindrical pipe 2, the flange-shaped protrusions 4a, 4b, 4c
Since metal shavings can be accommodated in the grooves between the shavings, the shavings do not scatter inside and outside the roller, and do not stain the equipment. Further, the shaft hole 4e of the press-fit portion 4 and the shaft hole 5 of the bearing portion 5 are formed.
a, and the inclined surface 4f formed on the inner end face in the press-fit direction of the press-fit portion 4 is inclined so as to be depressed toward the shaft hole 4e. When applying the plating solution,
The plating solution can be easily escaped to the plating tank via e and 5a, so that the plating solution does not remain inside the roller, rust can be prevented, and workability is improved.

In the outer diameter polishing step and the coating step, when the transport roller 1 is heated to about 180 ° C., the cylindrical pipe 2 expands, but the concentric press-fitting bearing body 3 has a plurality of flange-shaped protrusions. 4a, 4b, and 4c, the press-fit guide portion 2b of the cylindrical pipe 2 is firmly press-fitted with a small contact area and the contact portions are provided at a plurality of locations in the axial direction, so that distortion due to thermal expansion hardly occurs. In addition, loosening between the cylindrical pipe 2 and the concentric press-fit bearing body 3 hardly occurs.

Various ring-shaped bearings can be mounted on the concentric press-fit bearing body 3 of the transport roller 1 according to the product specifications. For example, as shown in FIG.
The bearing 11 may be fitted into the large diameter portion 6 of the bearing 5. Further, as shown in FIG. 7B, a metal bearing 12 may be fitted in the small diameter portion 8 of the bearing portion 5. Alternatively, as shown in FIG. 7 (c), a metal bearing 13 provided with a side pressure spring 13 a on the outer surface may be fitted into the tapered portion 7. This metal bearing 13 may fall off because it is fitted along the tapered portion 7, but when the metal bearing 13 is assembled to the apparatus body by the side pressure spring 13a, a side pressure is applied toward the center of the roller.
The metal bearing 13 is firmly fitted. Further, as shown in FIG.
The drive transmission gear 14 may be integrally fitted with the drive transmission gear 14.
In this way, the concentric press-fit bearing body 3 functions as a versatile and highly rigid rotating shaft depending on the device form.

As shown in FIGS. 9 and 10, drive transmission is performed to one or both shaft holes 4e and 5a of the two-sided concentric press-fit bearing body 3 fitted into the cylindrical pipe 2 according to the product specification. It is also possible to fit the rotary shaft 15 for use. Also in this case, since the rotary shaft 15 itself is supported by the bearing portion 5 of the concentric press-fit bearing body 3 without being supported, the transport roller 1 does not bend or run out.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment. For example, the present invention is not limited to this. Needless to say, the number and the shape and dimensions in the circumferential and width directions can be variously changed depending on the product, and many other modifications can be made without departing from the spirit of the invention.

[0030]

Conveying roller according to the present invention, as described above, extends from the concentrically press-fitting portion a shaft hole is formed, the
The large diameter part and the small diameter part are continuous through the tapered part in the extension direction.
Kim rigid integrally formed with a bearing portion formed by forming Te
The genus made concentric pressed bearing body, seen write fitted high concentricity pressed bearing body rigidity on both sides an opening of a cylindrical pipe, large diameter portion and a small diameter portion Te
By supporting the bearing at a large diameter portion of the bearing portion formed continuously through the taper portion, the strength of the bearing portion can be improved, and the roller deflects due to its own weight at the center portion of the roller and deflection of the outer periphery. The transfer performance can be maintained with high precision without generation of the trouble, and the manufacturing cost can be reduced because the number of parts and the number of assembling steps are small. Further, press-fitting portions having a plurality of flange-shaped protrusions formed in the outer periphery through grooves in the axial direction are press-fitted from both side openings of the cylindrical pipe, and the concentric press-fitting bearing body is inserted into the cylindrical pipe. Since the press-fit surface of the press-fit portion is hardly affected by distortion and looseness between components due to the heat- coating process, and the taper portion of the bearing portion held by the polishing jig, since the press-fit surface is firmly press-fitted in the radial direction with a small contact area. By polishing and finishing the outer diameter of the cylindrical pipe with reference to the above, the run-out accuracy of the outer periphery of the roller can be finished with high accuracy on the order of microns.

Further, when press-fitting the concentric press-fitting bearing body into the cylindrical pipe, metal shavings can be stored in each groove between the flange-shaped protrusions, so that the shavings are scattered inside and outside the roller. And does not pollute the equipment. Further, since the inclined surface formed on the inner end face in the press-fitting direction of the press-fitting portion is inclined so as to be depressed toward the shaft hole, the plating solution is applied to the conveying roller when applying metal plating to the conveying roller. Along the shaft hole to facilitate escape to the outside, prevent the plating solution from remaining inside the roller, prevent generation of rust, and improve workability.

In the bearing of the concentric press-fit bearing body,
Various ring-shaped bearings and drive transmission gears can be attached, and a rotating shaft can be attached to the shaft hole if necessary. Rollers can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing a configuration of a transport roller.

FIG. 2 is a partially cutaway sectional view of a concentric press-fit bearing body.

FIG. 3 is a sectional view of a cylindrical pipe.

FIG. 4 is an explanatory view showing a state where a concentric press-fit bearing body is fitted into a cylindrical pipe.

FIG. 5 is an explanatory diagram showing a state in which a conveying roller is set on a polishing jig.

FIG. 6 is an explanatory view showing a state where the outer diameter of a cylindrical pipe is polished.

FIG. 7 is an explanatory view showing a state in which various ring-shaped bearings are fitted on the peripheral surface of the bearing portion.

FIG. 8 is an explanatory view showing a state in which a drive transmission gear is fitted into a bearing.

FIG. 9 is an explanatory view showing a state in which the rotating shaft is fitted into one of the concentric press-fit bearing bodies on both sides.

FIG. 10 is an explanatory view showing a state in which the rotating shaft is fitted into both of the two concentric press-fit bearing bodies.

FIG. 11 is an explanatory diagram of a conventional transport roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyance roller 2 Cylindrical pipe 2a Opening 2b Press-fit guide part 2c Step wall 3 Concentric press-fit bearing body 4 Press-fit part 4a, 4b, 4c Flange-like protrusion part 4d Flange part 4e, 5a Shaft hole 4f Inclined surface 5 Bearing part 6 Large Diameter part 7 Tapered part 8 Small diameter part 9 Press fitting jig 10 Polishing jig 11 Bearing bearing 12, 13 Metal bearing 13a Side pressure spring 14 Drive transmission gear 15 Rotation shaft

Claims (10)

(57) [Claims] 1. A large-diameter portion and a small-diameter portion extend in a concentric manner from a press-fit portion in which a shaft hole is formed.
Metal with integral bearing part formed continuously
The manufacturing concentric pressed bearing body, and each pressed tighten the press-fit portion from both sides the opening of the metallic cylindrical pipe, the outer circumference of the cylindrical pipe
A conveying roller, the surface of which is coated, and formed so as to be able to pivot at a large diameter portion of the bearing portion. 2. The conveying roller according to claim 1, wherein a ring-shaped bearing is fitted into said large diameter portion. 3. The tapered portion is formed on an inclined surface following a holding surface of a polishing jig, and a ring-shaped bearing provided with a side pressure spring on an outer surface is fitted into the inclined surface. The conveying roller according to claim 1, wherein 4. The transport roller according to claim 1, wherein a drive transmission gear is fitted into the small diameter portion. 5. The cylindrical pipe according to claim 1, wherein an outer diameter of the cylindrical pipe is polished with reference to a tapered portion on both sides held by a polishing jig. A transport roller according to any one of the preceding claims. 6. The cylindrical pipe has an outer diameter polished and finished.
6. The transport roller according to claim 5, wherein a coating process is performed after metal plating is performed on an outer periphery. 7. A rotary shaft is fitted in one or both of the shaft holes of the concentric press-fit bearings fitted in openings on both sides of the cylindrical pipe.
The transport roller according to claim 6. 8. The conveyance according to claim 1, wherein the press-fitting portion has a plurality of flange-shaped protrusions formed on an outer periphery thereof via a groove. roller. 9. A tapered surface whose outer diameter increases toward an opening end side to the cylindrical pipe is formed on an outer periphery of the flange-shaped protrusion. The conveying roller as described. 10. An end surface of the press-fitting portion in the press-fitting direction on the inner side in the press-fitting direction is formed with an inclined surface that is inclined so as to be depressed toward the shaft hole formed in the center portion. The transport roller according to any one of the above.