JPS631644A - Paper sheet feeding mechanism for sheet feeder - Google Patents

Abstract

PURPOSE:To reduce the time necessary for the suction of a paper sheet by allowing a power to be transmitted or not transmitted to a pick roller gear by setting an idle gear and a planetary gear into meshed or disengaged state and allowing the paper sheet to be adsorbed and discharged only by the normal revolution of a platen. CONSTITUTION:When a solenoid 8 is in opened state, an idle gear 3 and a planetary gear 4 are meshed with each other by a spring 12, and the power of a platen gear 20 is transmitted to a pick roller gear 5 for suction and a stacker roller gear 2 for discharge. When the solenoid 8 is in suction state, a cam 6 is attracted by the solenoid and revolved, and a collar 14 opposed to the surface of the cam 6 is pushed, and the idle gear 3 and the planetary gear 4 are separated, and no power is transmitted to the pick roller 5 for suction, and the power is transmitted to the stacker roller gear 2 for discharge. Therefore, a paper sheet can be adsorbed and discharged only by the normal revolution of a platen, and the time necessary for the adsorption of the paper sheet can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding mechanism for a sheet feeder, and particularly to a paper feeding mechanism for a sheet feeder that is characterized by suction and ejection of paper.

[Prior Art] Conventional sheet feeders of this type use reverse rotation to feed paper, print on one sheet of paper, and suck the paper after it has been completely ejected. Ta. That is, reverse rotation of the power of the platen is transmitted to the big roller using a gear train to suck in paper, and normal rotation is used to discharge the paper.

[Problems to be solved] In the paper feeding mechanism of the conventional sheet feeder described above, reverse rotation of the platen power is transmitted to the big roller using a gear train to suck in the paper, and forward rotation is used to eject the paper. However, after printing on one sheet, the next sheet cannot be sucked in until the ejection is completely completed, which has the disadvantage that it takes a long time to suck the sheet.

[Means for Solving Problems] The present invention has been made by focusing on the above-mentioned conventional problems, and it is possible to suck and eject paper only by forward rotation of the platen without using the reverse rotation of the platen for sucking paper. It is an object of the present invention to provide an efficient paper feeding mechanism for a sheet feeder that can shorten the time required to suck paper.

To this end, the present invention provides a planetary gear that revolves around the pick roller gear by an arm coaxial with the pick roller gear, meshes with the pick roller gear, and rotates around a pin of the arm, and the planet gear and the planet gear. The idle gear has a collar attached to the arm to separate the idle gear meshing with the gear, a cam facing the collar and coaxially provided with the idle gear, and a solenoid for rotating the cam. The present invention provides a paper feeding mechanism for a sheet feeder that can transmit or not transmit power to a pick roller gear by meshing or non-meshing a gear and a planetary gear.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view showing a paper feed mechanism of a sheet feeder according to an embodiment of the present invention, FIG. 2 is a side view showing the paper suction/ejection state when the solenoid of the paper feed mechanism of FIG. 1 is in an open state, and FIG. 3 is a side view showing a state in which the solenoid is in the suction state and only paper is ejected.

In the figure, 1.3 is an idle gear, 2 is a stacker roller gear, 4 is a planetary gear, 5 is a pick roller gear, 6 is a cam,
7 is a link arm, 8 is a solenoid, 9 is a spring,
10.11 is a stud, 12 is a spring, 13 is an arm, 1
4 is a collar, 15 is a pick roller shaft, 16 is a big roller, 17 is a stacker roller, 18 is a pressure roller, 19 is a platen, and 20 is a platen gear.

The planetary gear 4 revolves around the pick roller gear 5 by an arm 13 provided at the same time as the pick roller gear 5, and is engaged with the pick roller gear 5 to rotate about the pin of the arm 13 as an axis.

The collar 14 is attached to the arm 13 in order to separate the planetary gear 4 and the idle gear 3 that meshes with the planetary gear 4.

The cam 6 is rotatably provided coaxially with the idle gear 3 so as to face the collar 14.

A solenoid 8 is provided to rotate the cam 6.

That is, the link arm 7 is attached to the cam 6,
A solenoid 8 is attached to this link arm 7.

Further, the spring 9 is attached to the link arm 7 and the stud 11.

Furthermore, a spring 12 is attached coaxially to the pick roller gear 5, and is hooked onto the stud 10 and arm 13 (see FIG. 2 for details).

At this time, the spring 12 is attached between the arm 13 and the pin 5.

Therefore, as shown in FIG. 2, when the solenoid 8 is in the open state, the idle gear 3 and the planetary gear 4 are engaged by the spring 12, and both the pick roller gear 5 for suction and the stacker roller gear 2 for discharge are connected to the platen. Power is transmitted.

Further, as shown in FIG. 3, when the solenoid 8 is in the suction state, the cam 6 is pulled by the solenoid 8 and rotates, pushing the collar 14 facing the cam surface and separating the idle gear 3 and the planetary gear 4, thereby creating a gap A. The power is not transmitted to the pick roller gear 5 for suction, but is transmitted to the stacker roller gear 2 for discharge.

[Effects of the Invention] As explained above, the present invention provides a planetary gear that revolves around the pick roller gear by an arm coaxial with the pick roller gear, meshes with the pick roller gear, and rotates around the pin of the arm. a collar attached to the arm to separate the planetary gear and the idler gear meshing with the planetary gear; a cam provided coaxially with the idler gear facing the collar; and a collar for rotating the cam. The paper feeding mechanism of the sheet feeder has a solenoid and is capable of transmitting or not transmitting power to the pick roller gear by meshing or disengaging the idle gear and the planetary gear, and uses reverse rotation of the platen for sucking paper. Paper can be sucked and ejected by simply rotating the platen in the normal direction, reducing the time required to suck the paper and improving efficiency.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a paper feeding mechanism of a sheet feeder according to an embodiment of the present invention; FIG. 2 is a side view showing the paper suction/ejection state when the solenoid of the paper feeding mechanism of FIG. 1 is in an open state; FIG. 3 is a side view showing a state in which the solenoid is in the suction state and only paper is ejected. 3: Idle gear 4: Planetary gear 5: Pick roller gear

Claims (1)

[Claims] A planetary gear that revolves around the pick roller gear by an arm coaxial with the pick roller gear and rotates around a pin of the arm while meshing with the pick roller gear, and an idle gear that meshes with the planet gear and the planet gear. A collar attached to the arm to separate the gears, a cam facing the collar and coaxially provided with the idle gear, and a solenoid for rotating the cam, the gear meshing with the idle gear and the planetary gear. Or, a paper feed mechanism of a sheet feeder that can transmit or not transmit power to the pick roller gear in a non-meshing manner.