JPH0361233A - Recording material sheet feeding mechanism of electronic photograph type printer - Google Patents

Abstract

PURPOSE:To reduce the cost and reduce the number of parts by actuating each torque transfer structure against each part to transfer torque to each sheet feeding part to work as one fan type gear. CONSTITUTION:In the case of feeding a sheet from a hopper A, a fan type gear 20 is rotated by an angle theta in the (d) direction. At this time, as a gear 15 is rotated in the (a) direction, a pulley 12 does not rotate. Next, the fan type gear 20 is rotated by an angle theta in the C direction. At this time, as the gear 15 is rotated in the (b) direction, a torque is given to the pulley 12, a pick roller 1 of the last step is rotated toward (e) and a recording material is delivered in the (g) direction. In the case of feeding sheets continuously, the above work is repeated. In the case of feeding sheet from a hopper B, the fan type gear 20 is rotated by an angle theta in the C direction. At this time, as a gear 18 is rotated in the b direction, a torque is given to a pulley 17, a pick roller 2 of the last step is rotated in the (n) direction and a recording material of the hopper B is delivered in the g direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a recording material feeding mechanism of an electrophotographic near printer having a plurality of recording material feeding sections for feeding recording materials.
In particular, fc! Concerning the recording material feeder line.

[Prior Art] Conventionally, it has become common for electrophotographic printers of this type to feed a plurality of types of recording materials of different sizes. Therefore, the recording material feeding section that feeds the recording material is also separated at multiple locations, and the recording material feeding mechanism for this purpose either has a drive source for each paper feeding section, or is equipped with an electromagnetic clutch or the like. It had an R structure that changed the direction of rotational force transmission.

[Problem to be solved by the invention]

The conventional paper feeding mechanism described above either has a drive source for each paper feeding section or uses an electromagnetic clutch or the like to switch the direction of rotational force transmission, resulting in high manufacturing costs and a large number of parts. There were drawbacks.

[Means for Solving the Problems] An object of the present invention is to solve the problems of the prior art described above, and to provide a recording material feeding mechanism for an electrophotographic printer that has a simple structure, low manufacturing cost, and a small number of parts. It is to provide.

The present invention provides a recording material feeding mechanism for an electrophotographic printer that has multiple cylinders of recording material feeding sections that feed recording materials, and provides a plurality of rotations that transmit rotational force to each recording material feeding section. It has a force transmission mechanism section and a fan-shaped gear capable of transmitting rotational force to each of the rotational force transmission mechanism sections, and the first rotational force transmission of the rotational force transmission mechanism is a gear with a one-way bearing inserted, and the one-way Each pitch circle of the gear in which the bearing is inserted is arranged on the pitch circle of the fan-shaped gear, and the fan-shaped gear meshes only with any one of the gears in which the one-way bearing is inserted on the pitch circle of the fan-shaped gear. It is characterized by rotation.

[Embodiment] Next, a recording material feeding mechanism of an electrophotographic printer according to the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of a recording material feeding mechanism of an electrophotographic printer according to the present invention.

In the drawing, A, B, and C are hoppers in which recording materials are set, and pick rollers 1, 2, and 3 are in pressure contact with the recording materials in each hopper. A gear 4.5.6 is fixed to each pick roller 1.2.3. The sector gear 20 is attached to a motor 21 and is stopped at the position shown in FIG.

The gears 15, 18, 24 are arranged on the pitch circle of the fan-shaped gear 20 as shown in FIG.
．． 23, one one-way bearing 16.1, and 22. That is, when the gear 15, 18, 24 rotates in the direction a, the pulley 12, 17, 23 idles, and transmits rotational force only when it rotates in the direction b.

Gear 7.8.9, pulley 10.11.12, and belt 13.14 transmit the rotational force of fan-shaped gear 20 to gear 4 via gear 15, and further rotate pick roller 1 to rotate hopper A. Feed the recording material in the g direction. Similarly, gear 2
5. The pulleys 26 and 17 and the belt 27 are fan-shaped gears 20
The rotational force applied to the gear 18 is transmitted to the pick roller 2, and the recording material in the hopper B is fed. The gear 28, pulleys 29, 23, and belt 30 transmit the rotational force applied from the fan-shaped gear 20 to the gear 24 to the pick roller 3, and feed the recording material from the hopper C.

Next, the operation of the recording material feeding mechanism of the electrophotographic printer according to the present invention shown in FIG. 1 will be explained.

First, when feeding paper from hopper A, the fan-shaped gear 20 is rotated by an angle θ in the d direction. At this time, the gear 15 rotates in the a direction, so the pulley 12 does not rotate, and the fan-shaped gear 20 rotates in the C direction by an angle θ. At this time gear 15
rotates in the direction b, which applies rotational force to the pulley 12, rotates the pick roller 1 at the final stage in the direction e, and feeds the recording material in the direction g. If you want to feed paper continuously, repeat the above operation.

When feeding paper from hopper B, the fan-shaped gear 20 is rotated by an angle θ in the direction C from the position shown in FIG. At this time, the gear 18 rotates in the direction b, applying rotational force to the pulley 17, and the pick roller 2 at the final stage rotates in the direction h, sending the recording material in the hopper B in the direction g.

For continuous paper feeding, repeat the above operation.

When feeding paper from the hopper C, the fan-shaped gear 20 is rotated by an angle of 2θ from the position shown in FIG. 1 in the direction d. At this time, the gears 15 and 24 rotate in the a direction, so the pulleys 12 and 23 do not rotate.Next, when the fan-shaped gear 20 is rotated by the angle θ in the C direction, the pick roller 3 is rotated in the j direction as described above. It rotates and feeds the recording material in hopper C in the g direction. After paper feeding from the hopper C is completed, the fan-shaped gear 20 rotates in the direction d and returns to the position shown in FIG.

[Name of the Invention] As explained above, the present invention can reduce costs and reduce the number of parts by operating each rotational force transmission mechanism for each of the paper feed sections as one fan-shaped gear. It's effective.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of a recording material feeding mechanism of an electrophotographic printer according to the present invention. 1.2.3... Pick roller 4.5.6.7.8.9.15.18.25.24.2
8...Gear l0511.12.17.26.23.29...Pulley 13.14.27.30...Belt 16.19.22...One-way bearing 20...Sector gear 1...・Motor A, B, ・Hopper

Claims (1)

[Claims] In a recording material feeding mechanism of an electrophotographic printer having a plurality of recording material feeding sections that feed recording materials, a plurality of rotational force transmission mechanism sections that transmit rotational force to each recording material feeding section, respectively; and a fan-shaped gear capable of transmitting rotational force to each of the rotational force transmission mechanism parts, the first rotational force transmission of the rotational force transmission mechanism is a gear into which a one-way bearing is inserted, and the one-way bearing is inserted. The pitch circle of each of the gears that has arrived is arranged on the pitch circle of the fan-shaped gear,
A recording material feeding mechanism for an electrophotographic printer, wherein the fan-shaped gear rotates by meshing with only one of the gears in which a one-way bearing on a pitch circle of the fan-shaped gear is inserted.