JPH0289732A - Paper feeding device - Google Patents

Abstract

PURPOSE:To enable to control selectively the rotation of two kinds of carrier shafts only by switching the rotation of one motor by coupling the output shafts of one-way clutches with two carrier shafts respectively as well as coupling the input side with the output shaft of the motor such as to be rotated mutually in the reverse direction. CONSTITUTION:When the output shaft of a motor 26 is rotated clockwise by a motor controller, the one carrier shaft 18 is positively rotated through a one-way clutch 34, so that the cut paper in a paper cassette 22 is fed in the fixed direction by the rotation of a paper driving friction roller 18a. In this case, the driven gear 42 of the other carrier shaft 20 runs idle. If the output shaft of the motor 26 is reversely rotated, the driven gear 42 is rotated clockwise, and this rotation is transmitted to the other carrier shaft 20 through a one-way clutch 40 so that the cut paper in a paper cassette 24 is fed in the fixed direction. In this case, a driven pulley 36 runs idle counter-clockwise.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a paper feeding device used in a copying machine or the like.

[Conventional technology]

A paper feeding device that selectively drives two transport axes to feed the paper in a paper cassette in a predetermined direction may use an independent motor for each transport shaft, or may use a motor as shown in Figure 3. Then, two conveyor shafts 6 and 8 are connected to the output shaft of one motor 2 via an electromagnetic switching clutch 4, and the two conveyor shafts 6 and 8 are connected to the output shaft of one motor 2 by switching the switching clutch under the control of the controller.
. sending.

[Problem that the invention seeks to solve]

As mentioned above, using multiple motors increases costs, and if a switching clutch is used, a controller for the switching clutch is required, resulting in a complicated configuration, which also increases costs. existed. The present invention aims to eliminate the above-mentioned defects.

[Means to solve problems]

In order to achieve the above object, the present invention provides a paper feeding device that rotates a conveyance shaft by driving a motor to feed paper in a predetermined direction, in which the output side of a one-way clutch is connected to each of two conveyance shafts, The input sides of these one-way clutches are connected to the output shaft of the motor so as to rotate in opposite directions.

[Effect]

When the motor rotates forward, the input side of one of the two one-way clutches connected to the two conveyance shafts rotates forward, and the input side of the other clutch rotates reversely. The forward rotation of the input side of the one-way clutch is transmitted to the output side, a conveyance shaft connected to this one-way clutch rotates, and paper is fed by this conveyance shaft.

On the other hand, in a one-way clutch in which the input side rotates in the opposite direction, the rotation of the input side is not transmitted to the output side, and the input side rotates idly. If the motor is rotated in the reverse direction, the relationship between the forward and reverse rotations of the input sides of the two one-way clutches will be reversed.

When the motor rotates forward, the input side of the one-way clutch that rotated in the forward direction now rotates in the reverse direction, and when the motor rotates forward, the input side of the one-way clutch that rotated in the opposite direction now rotates in the forward direction.

The forward rotation of the input side of the clutch is transmitted to the output side, and a conveyance shaft connected to this output side rotates to feed the paper.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 12 and 14 denote a bracket provided on the body of a paper feeding device such as a copying machine, and a conveying shaft 18.degree. 20 is rotatably installed parallel to each other with a step above and below the bracket. A paper cassette 22 is located below the conveyance shaft 18.20.
．． A known cassette insertion frame (not shown) is provided between the brackets 12 and 14 so that the cassette 24 can be inserted and arranged in a detachable manner. 26 is a motor fixedly attached to the bracket 14, and a drive pulley 30 is connected to the output shaft 28 of this motor.
and the drive gear 32 are fixed. 34 is a one-way clutch whose output side is connected to the conveying shaft 18, and a driven pulley 3 fixed to the input shaft of this clutch.
A transmission belt 38 is passed between the pulley 30 and the pulley 30. Reference numeral 40 designates a one-way clutch whose output side is connected to the conveyance shaft 20, and a driven gear 42 fixed to the input shaft of this clutch meshes with the drive gear 32. The one-way clutch 34, 40 is shown in FIG. 2 of the input shaft.

Only clockwise rotation (forward rotation) is transmitted to the output side, and counterclockwise rotation (reverse rotation) of the input shaft is not transmitted to the output side.
The input shaft is configured to rotate idly.

In the above configuration, when the motor controller (not shown) rotates the output shaft 28 of the motor 26 in the clockwise direction in FIG.

Conventional pulley 36 via drive pulley 30 and belt 38
It is also transmitted to the driven gear 42 via the drive gear 32, thereby causing the driven pulley 36 to rotate clockwise and the driven gear 42 to rotate counterclockwise. The clockwise rotation of the driven pulley 36 causes the transport shaft 18 to rotate forward via the one-way clutch 34, and the cut paper in the paper cassette 22 is sent in a predetermined direction by the rotation of the paper drive friction roller 18a. At this time, the driven gear 42 idles. When the output shaft 28 of the motor 26 is rotated in the reverse direction, the driven gear 42 rotates clockwise in FIG. sent in the direction of At this time,
The driven pulley 36 idles counterclockwise.

〔effect〕

Since the present invention is constructed as described above, it has the advantage that by switching the rotation of one motor, it is possible to selectively control the rotation of two types of conveyance axes.

[Brief explanation of the drawing]

FIG. 1 is an external view, FIG. 2 is a side view, and FIG. 3 is an external view of the prior art. 2... Motor, 4... Switching clutch, 6, 8... Conveyance axis, 12.14... Bracket, 18.20... Conveyance axis, 22.24... Paper cassette, 26... Motor , 28...Output shaft, 30...Pulley, 32...Gear, 34...- clutch, 36...Pulley, 38...
・Transmission belt, 40・One-way clutch 42...Gear

Claims (1)

[Claims] (1) In a paper feeding device that feeds paper in a predetermined direction by rotating the conveyance shaft by a motor, the output side of one clutch is connected to each of the two conveyance shafts, and the input sides of these one-way clutches are connected to each other. A paper feeding device, characterized in that the paper feeding device is connected to the output shaft of the motor so as to rotate in the opposite direction.