JPH0351243A - Paper feed device for facsimile - Google Patents

Abstract

PURPOSE:To make a copying of good quality by suitably utilizing gears fitted with one-way clutch, and rotating a transmitter-side roller and a receiver-side roller simultaneously by a motor when the pictures are received or copied. CONSTITUTION:When a motor M, for example, is rotated in the forward direc tion, a first gear A fitted with one-way clutch and a rotary shaft 52 of a receiver-side roller R2 are connected to each other, and a rotary shaft S1 of a transmitter-side roller R1 and a second gear D fitted with one-way clutch are also connected to each other, while a third gear B fitted with one-way clutch runs idle. As a result, the receiver-side roller R2 and the transmitter-side roller R1 are rotated in the same direction. On the other hand, when the motor M is rotated in the reverse direction, the first gear A fitted with one-way clutch and the second gear D fitted with one-way clutch are brought into an idle running state, while the third gear B fitted with one-way clutch and the rotary shaft S1 of the transmitter-side roller R1 are connected to each other. Thus, only the transmitter-side roller R1 is rotated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a facsimile paper feeding device, and more specifically, to a facsimile paper feeding device in which a sending roller and a receiving roller are driven by a single reversible motor. This relates to a paper feeding device.

[Conventional technology]

When driving a sending roller and a receiving roller with one motor, conventionally the sending roller and the receiving roller are connected to the output gear of the motor through gears with one-way clutches having different rotational connection directions. That's what I do.

That is, when the motor rotates in the forward direction, for example, only the transmitting side roller is rotated, while when the motor rotates in the reverse direction, only the receiving side roller is rotated.

[Problem to be solved by the invention]

However, according to the above conventional example, the transmitting side roller and the receiving side roller cannot be rotated at the same time. Therefore, especially during a copying operation, the sending roller and the receiving roller are alternately and intermittently rotated, but there is a drawback that white spots or overlaps are likely to occur in the print, and the image quality of the print is poor.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a facsimile paper feeding device in which a sending roller and a receiving roller are driven by a single reversible rotary motor. A gear with a clutch is attached, and a second gear with a one-way clutch is attached to the rotating shaft of the sending roller, and a second gear with a one-way clutch has a rotation connection direction different from that of the first gear with a one-way clutch, and a second gear with an internal tooth and an external tooth. A gear with a one-way clutch and a third gear with a one-way clutch having the same rotation connection direction are mounted concentrically, and an intermediate gear is interposed between the internal teeth thereof and the second gear with a one-way clutch, and the external teeth of the third gear with one-way clutch and the first
The gear with a one-way clutch is meshed with the output gear of the motor.

[For production]

For example, when the motor rotates forward, the first gear with a one-way clutch and the rotation shaft of the receiving roller are connected, and the rotation shaft of the transmission roller and the second gear with a one-way clutch are connected, The gear with the third one-way clutch spins idly. As a result, both the receiving roller and the transmitting roller are rotated in the same direction.

On the other hand, when the motor rotates in reverse, the first gear with a one-way clutch and the second gear with a one-way clutch become idling, whereas the third gear with a one-way clutch rotates when the rotation axis of the sending roller is rotated. Connected. Therefore, only the sending roller is rotated.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, this paper feeding device includes one reversible motor M, a sending roller R1, and a receiving roller R2.

A first gear A with a one-way clutch is attached to the rotation shaft S2 of the receiving roller R2. In this case, the first gear A with a one-way clutch is connected to the rotating shaft S2 when rotating in the counterclockwise direction shown in the figure (during reverse rotation), and is connected to the rotating shaft S2 when rotating clockwise in the drawing (during forward rotation). It spins idly.

A gear wheel with a second one-way clutch is attached to the rotating shaft S1 of the sending roller R1. This second gear wheel with one-way clutch is connected to the rotating shaft S1 when rotating in the clockwise direction shown in the drawing (forward rotation), and is connected to the rotating shaft S1 when rotating in the counterclockwise direction shown in the drawing (reverse rotation). Driving idle. Further, a third gear B with a one-way clutch having internal teeth B1 and external teeth B2 is attached to the rotating shaft S1 of the sending roller R1 so as to be concentric with the second gear B with a one-way clutch. An intermediate gear C is interposed between the internal teeth B1 and the second gear with one-way clutch.

This third gear B with a one-way clutch, like the second gear B with a one-way clutch, is connected to the rotating shaft S1 of the sending roller R1 when rotating in the clockwise direction in the figure (forward rotation),
When rotating in the counterclockwise direction shown in the figure (reverse rotation), it idles with respect to the rotation axis S1.

Then, the output gear of the motor M includes a first gear A with a one-way clutch and a third gear B with a one-way clutch.
B2 is engaged.

FIG. 3 shows the operating state during transmission.

That is, at this time, the motor M is rotated in the opposite direction (counterclockwise in the drawing), and accordingly, the first and third gears A and B with one-way clutches are both rotated in the forward direction, whereas the second gear is rotated in the forward direction. A gear with a one-way clutch rotates in the opposite direction. Therefore, both the first and second one-way clutch gears A and D have their rotational axes S2. It idles relative to Sl, and only the third one-way clutch equipped gear B is connected to its rotating shaft S1, thereby rotating the sending roller R1 in the forward direction (clockwise in the figure).

During reception or copying, as shown in FIG. 4, the motor M is rotated in the forward direction (clockwise in the figure), and the first and third gears A with one-way clutches are accordingly rotated.
, B rotate in the opposite direction, whereas the gear with the second one-way clutch rotates in the forward direction. Therefore, the first
and second one-way clutch equipped gears A and D both have their rotating shafts S2. Only the gear B with the third one-way clutch, which is connected to S1, is idling with respect to the rotating shaft S1. As a result, the sending roller R1 is rotated in the forward direction (clockwise in the drawing), and the receiving roller R2 is rotated in the opposite direction.

As a modification, an intermediate gear may be interposed between the output gear of the motor M and the first and third one-way clutch equipped gears A and B. Between gear A with clutch and transmission side roller R1
A suitable transmission gear may be interposed between the gear and the second one-way clutch gear. Furthermore, by interposing the transmission gear, it is also possible to make the rotation direction of the receiving side roller R2 and the sending side roller R1 the same direction.

〔Effect of the invention〕

As explained above, according to the present invention, by skillfully utilizing a gear with a one-way clutch, it is possible to simultaneously rotate the transmitting side roller and the receiving side roller with one motor when receiving or copying. This results in particularly high-quality copies.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing the structure of an embodiment of a facsimile paper feeding device according to the present invention, FIG. 2 is a side view of the embodiment, and FIG. 3 is a diagram showing the structure of the embodiment during transmission. FIG. 4 is an explanatory diagram showing the operating state of the same embodiment during reception/copying. In the figure, A, B, and D are gears with one-way clutches, C is an intermediate gear, M is a motor, and SL and S2 are rotating shafts.

Claims (1)

[Claims] (1) In a facsimile paper feeding device in which a sending roller and a receiving roller are driven by one reversible motor, a gear with a first one-way clutch is attached to the rotating shaft of the receiving roller, and the sending roller is attached to the rotating shaft of the receiving roller. The rotating shaft of the side roller is provided with a second one-way clutch equipped gear having a rotation connection direction different from the first one-way clutch equipped gear, and a second one-way clutch equipped gear having internal teeth and external teeth. A gear with a third one-way clutch that has the same rotational connection direction as the gear is installed concentrically, and an intermediate gear is installed between the internal teeth of the third gear with one-way clutch and the second gear with one-way clutch. A facsimile paper feeding device characterized in that a gear is interposed, and the external teeth of the third gear with a one-way clutch and the first gear with a one-way clutch are meshed with the output gear of the motor. .