KR940001528Y1 - Paper feeding apparatus - Google Patents

Abstract

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Description

Copier Feeder

1 is a schematic diagram of a conventional technology.

2 is an overall configuration diagram of the present invention.

3 is an operating state of the present invention.

* Explanation of symbols for main parts of the drawings

1: resist roller 6: paper

11: solenoid 12: drive shaft

13: bracket 14: roller shaft

15: second spring 16: first spring

17: one-way rotating roller 18: fixing screw

19: fixing hole 20: shaft support

The present invention relates to a paper feeder for feeding copy paper set in a paper cassette of a copier, and more particularly, to a paper feeder applied to a small copier having a short distance between a paper roller and a resist roller.

Conventionally, a friction pad method using a friction separation characteristic between a friction pad and a paper was used, and the friction pad method will be described with reference to FIG. 1 as follows. In the drawings, 1 denotes a resist roller, 2 denotes a paper feed roller, 3 denotes a friction pad, 4 denotes a magnet clutch, 5 denotes a driving gear, and 6 denotes paper.

Referring to the operation, power is transmitted from the main motor (not shown in the figure) of the copier to the drive gear 5 by a drive transmission means, and the driving force of the drive gear 5 is magnesium which is powered by the radiation start signal. It is transmitted to the paper feed roller 2 through the clutch 4. At this time, when the paper feed roller 2 carries the paper 6 to the resist roller 1, the driving force of the magnet clutch 4 is cut off, and only the register roller 1 operates to supply paper. Here, the paper 6 is placed in the paper cassette and mounted in the copier, and the loaded paper 6 has one end of the top paper hanging in the gap between the pad 3 and the paper feed roller 2 to achieve a paper ready state. do. By the way, in the above-described friction pad method, in addition to the friction pad 3, a separate drive gear 5 and a magnet clutch 4 for controlling the driving force are required, and a constant between the paper feed roller 2 and the resist roller 1 is required. Since the distance must be secured, it has a complicated structure which is not suitable for small copiers.

Accordingly, an object of the present invention is to provide a paper feeding device having a simple structure suitable for a small copying machine.

In order to achieve the above object, the present invention provides a solenoid driven by a drive current supplied at a predetermined time in response to a radiation start signal, a shaft support connected to the solenoid to move downward by driving the solenoid, and the shaft support. A first spring connected to the shaft support to provide a restoring force to the shaft support, a drive shaft connected to the shaft support to rotate according to the operation of the shaft support, a bracket fixed to the drive shaft by a fixing screw, and a plane at both ends of the bracket The roller shaft, which is constrained by the guide hole formed in the roller shaft, and a general rotating roller (roller with one-way clutch bearing) fitted to the roller shaft, is connected to both ends of the bracket and the roller shaft and the bracket to form a one-way rotating roller. It consisted of two second springs fixed to the bracket.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view of the present invention, 11 is a solenoid, 12 is a drive shaft, 13 is a bracket for supporting a roller, 14 is a roller shaft, 15, 16 is a spring, 17 is a one-way rotating roller, 18 is a bracket fixing screw And 19 are fixed holes of the one-way rotating roller, and 20 are shaft supports, respectively.

The solenoid 11 is operated at a certain moment of drive current according to the radiation start signal to move the shaft support 20 downward, and thus the drive shaft 12 connected to the shaft support 20 also rotates in the direction of the arrow in the drawing. Done. The bracket 13 fixed to the drive shaft 12 also rotates with the drive shaft 12 as a hinge point, and the one-way rotating roller 17 fitted into the guide hole 19 of the bracket 13 also rotates. Do it. At this time, the one end rotation roller 17 is fitted to the roller shaft 14 from the moment the one rotation roller 17 touches the container 6 located directly below the one rotation roller 17 to the moment when the one rotation roller 17 is separated from the paper 6. The general rotary roller 17 is locked with the roller shaft 14 and receives the tension of both springs 15 along the guide groove in the state that it is not rotated and feeds the paper. When the sheet of paper 6 to be fed is queued in the resist roller 1, the driving current which briefly driven the solenoid 11 is cut off, and the resist roller 1 is driven to take over the fed sheet that has been transferred. The one-way rotating roller 17 which has delivered the paper 21 to the resist roller 1 is restored to its position by the tension of the spring 16 fixed to the shaft support 20, in which case the one-way rotating roller 17 is the roller. Since it idles with the shaft 14, it returns to the original state, without applying any interference force to the paper being transmitted.

Let us explain in more detail the operation of the present invention through FIG.

3 is an operation state diagram of the present invention, 3a is a state of the one-way rotating roller 17 before the drive current is applied to the solenoid 11, 3b is a drive shaft 12 is rotated by the solenoid 11 is operated one side It shows the state where the rotary roller 17 starts to feed the paper 6. At this time, the one-way rotating roller 17 does not rotate, and a pressure of a size corresponding to the minute tension of the spring 15 is applied on the paper 6. The frictional force between the one-way rotating roller 17 and the paper applied by this pressure is greater than the frictional force between the papers, and should be adjusted to a size capable of feeding only one sheet of paper, the adjustment of which is made possible by the selective application of the spring 15. 3C shows a state in which the drive shaft 12 is stopped by the solenoid 11 operation to the maximum rotation. In this case, the paper 6 is curled at the entrance of the resist roller 1 so that the resist roller 1 is loaded with the paper 6. Indicates the state just before taking over. 3d shows the state of the process in which the one-way rotating roller 17 is restored to the initial position by the tension of the spring 16 in the state in which the resist roller 1 takes over the paper 6, and the pressure as shown in FIG. Although applied on the sheet 6, the one-way rotating roller 17 idles with the roller shaft 14 in the clockwise direction as shown in the drawing so as not to disturb the flow of the sheet 6 being fed.

The present invention constructed and operated as described above does not require a separate driving device to drive the paper feed roller, does not require a friction pad, and can be configured in a narrow space, thereby enabling economical savings. There is.

Claims (1)

In the paper feeder of the copier, a shaft connected to the solenoid 11 and a solenoid 11 driven by a driving current supplied at a predetermined moment in response to the copy start signal, and moved downward by the drive of the solenoid 11. A first spring 16 connected to the support 20, the shaft support 20 to provide a restoring force to the shaft support 20, and connected to the shaft support 20 to the shaft support 20. Drive shaft 12 which rotates according to the operation of the shaft support 11, a bracket 13 fixed to the drive shaft 12 by a fixing screw 18, and a fixing hole formed in the bracket 13. 19 is connected to the one-way rotating roller 17, the roller shaft 14 is fitted, and the bracket 13 and the one-way rotating roller 17 for pressing and fixing the one-way rotating roller 17 to the bracket 13. Paper feeding device, characterized in that consisting of two second spring (14).