JPH05162887A - Roller incorporated in drive device - Google Patents

Abstract

PURPOSE:To miniaturize a drive roller for transferring a sheet-like material to be transferred, such as a film or a sheet. CONSTITUTION:There are provided a transfer roller body 2 having at its outer periphery a frictionally transferring member 11 for transferring a sheet-like material to be transferred, such as a film or a sheet, an actuator 3 disposed in the roller body 2, for rotating the roller body 2, a train of gears 5, 7, 8 for transmitting a drive output from the motor 3 to the roller body 2, and support shafts 4, 6 which are journalled to opposing ends of the roller body 2 through the intermediary of bearings 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller having a built-in driving device, which enables miniaturization of OA equipment for carrying a sheet-like article such as a film or paper.

[0002]

2. Description of the Related Art Conventionally, OAs such as facsimiles and printers that handle sheets of film or paper.
The progress of miniaturization and portability of devices is remarkable. With the miniaturization of these products by high-density mounting technology such as surface mounting on the circuit board, there is a strong demand for miniaturization of the mechanism part, which is currently supported by the miniaturization of actuators and space saving by component layout design. I am trying.

FIG. 5 is a block diagram showing the mechanism part of the conventional facsimile transmission part as an example. In this figure, reference numeral 20 is a contact image sensor, and the original 21 to be transmitted is read. Transport rollers 22 for transporting the document 21 are arranged on both sides of the contact-type image sensor 20 in the longitudinal direction, and the document 21 is paired with the transport roller 22 above the transport roller 22.
An auxiliary roller 23 for transporting the sheet is provided. 24
Is a stepping motor as a conveyance drive source, and the driving force of the stepping motor 24 is decelerated by a reduction gear unit 25 composed of a plurality of gears and transmitted to the conveyance roller 22. A timing belt 26 is hung between the shaft of the final gear of the reduction gear unit 25 and the shaft of the conveyance roller 22, and the rotational force of the stepping motor 24 is transmitted to the conveyance roller 22 via the reduction gear unit 25. Reference numeral 27 is a board on which an electric circuit for operating the facsimile transmission section is mounted, 28 is a frame holding the mechanism section, and 29 is a cabinet.

The operation of the conventional facsimile transmission section configured as described above will be described with reference to FIG. The document 21 is inserted into the main body of the apparatus in the direction of arrow A, decelerated to a predetermined rotation speed by the reduction gear unit 25 using the stepping motor 24 as a drive source, and the conveyance roller 22 and the auxiliary roller 23 are separated by the timing belt 26. By rotating the document 21, the original image 21 is conveyed and, at the same time, the image is read by the contact image sensor 20, and then the arrow B
Is discharged in the direction of.

[0005]

SUMMARY OF THE INVENTION In the above conventional configuration,
Even if the electric circuit section of the facsimile transmission section is miniaturized with high density by the surface mounting technology of a fine chip or the like, in its mechanism, the stepping motor 24 which is a drive source, the reduction gear section 25 of the drive reduction section, and the timing belt 2 are used.
Since the size is restricted by 6 or the like, there is a problem that the entire device cannot be downsized.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a roller having a built-in driving device, which can reduce the size of the entire device.

[0007]

In order to solve the above problems, a conveyance roller body having a frictional conveyance member on an outer peripheral portion for conveying a sheet-like conveyance object such as a film or a sheet, and a conveyance roller body inside the conveyance roller body. An actuator that rotates the transport roller body, a gear portion that transmits the drive output of the actuator to the transport roller body, and a support shaft that is supported by bearings at both ends of the transport roller body. There is.

[0008]

With the above-described structure, the present apparatus is configured to house the actuator and the reduction gear portion, which have been obstacles to miniaturization of the conventional mechanism, inside the conveying roller body.
Space can be saved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a drive device built-in roller according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view. In these figures, reference numeral 1 denotes a frictional conveyance member made of rubber or the like for obtaining a frictional force for conveying an original, and the frictional conveyance member 1 is provided on an outer peripheral portion of a conveyance roller body 2. An actuator 3 is built in the conveyance roller body 2, and the actuator 3 is supported by one support shaft 4. A pinion gear 5 is attached to the output shaft of the actuator 3, and meshes with an intermediate gear 7 rotatably fitted to three shafts provided on the other support shaft 6.

An internal gear 8 is integrally machined or formed as a separate body and fitted into the inner circumference of the transport roller body 2 so as to mesh with the intermediate gear 7. The one support shaft 4 and the other support shaft 6 are fitted via bearings 9 fitted in both ends of the transport roller body 2 so that the transport roller body 2 can freely rotate. In addition, 10 is a cable extraction hole for taking out the current supply cable of the actuator 3, and 11 is a mounting hole for fixing the entire roller with a built-in drive device.

The operation of the roller with a built-in drive device constructed as described above will be described. The rotation of the actuator 3 is decelerated by the intermediate gear 7 and the internal gear 8 to drive the transport roller body 2 pivotally supported by the one support shaft 4 and the other support shaft 6 to rotate the transport roller body 2.

FIG. 3 shows a state of use of the facsimile transmission unit having the roller with a built-in driving device, which is constructed as described above.
FIG. 4 shows a perspective view thereof. In both figures, the contact type image sensor 20, the manuscript 21, and the auxiliary roller 23 are
Since it is the same as the conventional example, the same numbers as in FIG. 3 and 4, A is a roller with a built-in drive device according to the present invention, and the roller A with a built-in drive device is fixed to the cabinet 13 by a boss 12. 14 is a substrate downsized by a high-density mounting technique. The transmission operation of the facsimile is the same as that of the conventional example, so the description of the operation is omitted.

Although the above embodiment shows the case where the roller with a built-in driving device is used in a facsimile, the present invention is not limited to the roller of the facsimile, and other film-like or sheet-like conveyed objects such as paper may be used. OA to transport
It may be used for equipment.

[0014]

As described above, by using the roller with a built-in drive device according to the present invention, the size can be greatly reduced as compared with the conventional device, and the structure is extremely simple, so that the number of assembling steps can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drive device built-in roller according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a roller with a built-in drive device according to an embodiment of the present invention.

FIG. 3 is a view showing a state of use of a facsimile transmission mechanism using a roller with a built-in driving device according to an embodiment of the present invention.

FIG. 4 is a perspective view of a mechanism of a facsimile transmission unit using a roller with a built-in driving device according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional facsimile transmission mechanism.

[Explanation of symbols]

 1 Friction Conveying Member 2 Conveying Roller Main Body 3 Actuator 4 Support Shaft 5 Pinion Gear 6 Support Shaft 7 Intermediate Gear 8 Internal Gear 9 Bearing

Claims (1)

[Claims] 1. A transport roller main body having a frictional transport member on an outer peripheral portion for transporting a sheet-shaped transport object such as a film or paper, and an actuator housed in the transport roller main body for rotating the transport roller main body. A roller with a built-in drive device, which is composed of a gear portion that transmits the drive output of the actuator to the conveyance roller body, and a support shaft that is rotatably supported by bearings at both ends of the conveyance roller body.