JPS62111840A - Paper feed device - Google Patents

Abstract

PURPOSE:To make a device small-sized reduce its cost by reciprocating a paper stopper against a paper feed path in conjunction with the engaging/disengaging action of a hook member with a sleeve. CONSTITUTION:A paper feed roller 1 is stopped or rotated in conjunction with the engaging/disengaging action of a hook member 8 with a hook claw 7a formed on the outer periphery of a sleeve 7. The claw 15a of a stopper 15 is extended on the conveyance path 13 on the downstream side of a conveying roller 14 and the extended end section 8b of the hook member 8 is coupled with the end section 15b extended upstream. Accordingly, a solenoid 11 is turned on and the hook member 8 is swayed, thereby the stopper 15 is swayed in conjunction with the sway of this hook member 8, thus the stopper claw 15a is retreated from the paper feed path 13. Since the hook member 8 and the stopper 15 are driven by one solenoid 11, the device can be made small-sized and its cost can be reduced.

Description

[Detailed description of the invention] Technical field The present invention relates to a paper feeding device for an electronic copying machine or the like.

PRIOR ART Conventionally, a paper feed roller is rotatably driven by a drive device via a spring clutch, and the paper feed portion that contacts the paper is formed in an arc shape. A locking member for cutting off the rotation transmission function of the clutch, a solenoid for engaging and disengaging the locking member from all sleeves to control the rotation of the paper feed roller, and a solenoid for controlling the rotation of the paper feed roller. , Gah, it comes into contact with the leading edge of the paper separated by the paper separation means at least while the paper feed roller is rotating, corrects the skew of the paper, and can move back and forth with respect to the paper feed path to keep the paper on standby. A paper feeding device is known that has a paper stopper disposed at the paper stopper.

However, this paper feeding device has disadvantages in that it is large and expensive because the engaging member and the paper stopper are each driven by two separately arranged solenoids.

Purpose An object of the present invention is to provide a locking member for cutting off the rotation transmission function of a spring clutch that transmits the rotational force of a drive device to a paper feed roller, and a paper stopper for correcting paper skew and holding the paper on standby. An object of the present invention is to provide a paper feeding device that can be driven by one solenoid, is small in size, and is inexpensive.

Structure The present invention provides a paper feed roller which is rotationally driven by a drive device via a spring clutch and whose paper feed portion that contacts the paper is formed in an arc shape, and which engages with a sleeve of the spring clutch. A locking member for disconnecting the rotation transmission function of the spring clutch, a solenoid for controlling the rotation of the paper feed roller by engaging and disengaging the locking member from the sleeve, and a solenoid for controlling the rotation of the paper feed roller. is,
Further, the paper feeding roller is capable of freely moving back and forth with respect to the paper feeding path for correcting the skew of the paper by coming into contact with the leading edge of the paper separated by the paper separating means at least while the paper is rotating, and for holding the paper on standby. In the paper feeding device having a paper stopper arranged therein, the paper stopper is moved forward and backward with respect to the paper feeding path in conjunction with the engagement/disengagement operation of the locking member with respect to the sleeve.

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

As shown in FIG. 1, sheets P are stacked and stored in a sheet feed tray T and fed by a sheet feed roller 1. As shown in FIG.

In this paper feed roller 1, a paper feed portion 1a that contacts the paper P is formed in an arc shape. Further, as shown in the second factor, for example, the paper feed roller 1 is driven by a moving gear 2, which is rotated in the direction of arrow a by a drive device (not shown), via a spring clutch 3. The spring clutch 3 includes a spring 6, one end of which is wound around the boss 2a of the drive gear 2, and the other end of which is wound around the boss 5a of the collar 5, which is integrated with the support shaft 4 of the paper feed roller 1. Spring 6
A sleeve 7 is fitted to engage the end 6a of the drive gear 2 and cover the spring 6. A locking pawl 7a is formed on the outer periphery of the sleeve 7, and the rotation of the paper feed roller 1 is stopped by the locking member 8 shown in FIG. , 20 rotations of the drive gear are also transmitted to the paper feed roller 1.

That is, when the locking member 8 is engaged with the locking pawl 7a as shown in FIG.
Since the end portion 6a of the gauze is locked by the sleeve 7,
The rotation of the drive gear 20 is not transmitted to the spring 6, and the rotation of the paper feed roller 1 is stopped. On the other hand, when the locking member 8 is released from the locking pawl 7a, the sleeve 7 is no longer restrained from the spring 6, and the drive gear 2 and the collar 5
are integrated via a spring 6, and the paper feed roller 1 rotates in the direction of arrow a in FIG.

The locking member 8 is swingably supported by a bracket 9, and is given a swinging behavior by a spring 10 such that its end 8a comes into contact with the circumferential surface of the sleeve 7. This locking member 8 is formed by the flutter of a flutter type solenoid 11 disposed on the bracket 9, and the locking pawl 7 is formed by the solenoid 11.
It is engaged and disengaged from a.

The uppermost sheet P fed by the rotation of the sheet feed roller 1 is separated from the other sheets P by corner pawls 2 disposed at both corners of the front end of the sheet feed tray T and then fed. ,
The sheet is further fed by a pair of conveying rollers 14 disposed on the sheet feeding path 13. The corner claw 12 is used to feed the highest paper P in the paper feed cassette T.
(i- constitutes a paper separating means for separating paper P from other papers P. In the paper feed path 13 on the downstream side of the conveyance roller 14, there is a paper P=5 A stopper claw 15a of a paper stopper 15 for waiting is extended.This paper stopper 15 is swingably supported by a support shaft 16, and an end portion thereof extending toward the upstream side of the paper feed path 13 extends. 15b is engaged with the extending end 8b of the locking member 8.Thereby, the paper stopper 15 is activated by turning on the solenoid 11 and swinging the locking member 8. As for the swinging of the stopper member, when the force of the stopper member 8 is not acting on it, the stopper claw 15a descends due to its own weight.

Therefore, the leading edge of the sheet P fed by the transport roller 14 comes into contact with the stopper claw 15a, so that the skew is corrected and the sheet P is kept on standby. Then, as the paper stopper 15 swings and its stopper claw 15a retreats from the paper feed path 13, the paper P is moved between the photoreceptor 17 and the transfer device 18 on which the toner image of the electronic copier is formed. will be shipped to.

Solenoid drive means 1 for operating the solenoid 11
9 is controlled by a solenoid control means 20, and this solenoid control means 20 is controlled by a control device 21 of the electronic copying machine.
It is connected to the. The solenoid control means 20 includes, for example, two timers, and when it receives a paper feed start signal from the control device 21, it supplies power to the solenoid 11 by the solenoid driving means 19 for a predetermined period of time, so that the solenoid 1
1 is turned on, and the solenoid drive means 1 is activated only for a predetermined time when a registration paper feed signal for feeding the paper Pi in synchronization with the toner image on the photoreceptor 17 is received from the control device 21.
9 supplies power to the solenoid 11 and turns the solenoid 11 to O.
Let it be N.

Next, the operation of the paper feeding device of the present invention will be explained in detail with reference to FIGS. 3 to 7.

When the solenoid control means 20 receives a paper feed start signal from the control device 21, the solenoid 11 is turned on and the end 8a of the locking member 8 swings as shown in FIG. 7a, and the paper feed roller 1 moves as shown by arrow a.
direction, and the paper P is fed as shown in FIG. In this case, the solenoid 11 is turned from ON to OFF after the paper feed roller l starts rotating (at least before the leading edge of the paper P reaches the stopper claw 1.5a of the paper stopper 15). Therefore, when the solenoid 11 is turned on, the stopper pawl 15a temporarily retreats from the paper feed path 13, but before the leading edge of the paper P reaches the stopper pawl 15a, it advances into the paper feed path 13 again (the first (See Figure 4).

As a result, the leading edge of the fed paper P comes into contact with the stopper claw 15a, the skew of the paper P is corrected, and the paper P is placed on standby (see FIG. 5).

Then, when the solenoid control means 20 receives a registration paper feed signal from the control device 21 after the leading edge of the paper P comes into contact with the stopper claw 15a, the solenoid 11 is turned on again. As a result, as shown in FIG. 6, the locking member 8 swings again, and in conjunction with the operation of the locking member 8, the paper stopper 15 swings, and its stopper claw
5a is withdrawn from the paper feed path 13, and the paper P is fed between the photoreceptor 17 and the transfer device 180 of the electronic copying machine. Here, the solenoid 11 is activated after the leading edge of the paper P comes into contact with the stopper claw 15a/Q''1 of the paper stopper 15, at least the locking claw 7a of the sleeve 7.
is turned from ON to OFF while reaching its home position (the position shown in FIG. 1). Therefore, the locking member 8 is returned by the elastic force of the spring 100 before the locking pawl 7a returns to its home position, and as shown in the seventh factor, the sleeve 7 is locked by the locking member 8 at its home position. Then, the rotation of the paper feed roller 1 is stopped. As shown in FIG. 7, the paper P lightly contacts the stopper claw 15a of the transport roller 15 due to its own weight, and the paper P disappears below the stopper claw 15a. The stopper claw 15a of the W trapper 15 descends to the position where the paper P is stopped. do.

Effects The paper feeding device of the present invention includes a locking member for cutting off the rotation transmission function of the spring clutch that transmits the rotational force of the N-drive device to the paper feeding roller, and a paper stone bar for correcting the skew of the paper and holding the paper on standby. and 'f: It can be driven by one solenoid, and is small and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment of the paper feeding device of the present invention, FIG. 2 is an exploded perspective view of a spring clutch in the same embodiment, and FIGS. 3 to 7 are operation explanatory diagrams of the same embodiment. be. 1...Paper feed roller, 3...Spring clutch, 7
... Sleeve, 8... Locking member, 11... Solenoid, 13... Paper feed path, 15... Paper stopper, P... Paper.

Claims (1)

[Claims] A paper feed roller that is rotationally driven by a drive device via a spring clutch and has an arcuate paper feed portion that contacts the paper and engages with the sleeve of the spring clutch to transmit the rotation of the spring clutch. A locking member for disconnecting the function, a solenoid for controlling the rotation of the paper feed roller by engaging and disengaging the locking member from the sleeve, and a solenoid for controlling the rotation of the paper feed roller. The paper feed roller is arranged so as to be movable forward and backward with respect to the paper feed path so as to correct the skew of the paper by coming into contact with the leading edge of the paper separated by the separation means at least while the paper is rotating, and to hold the paper on standby. A paper feeding device having a paper stopper, wherein the paper stopper is moved forward and backward with respect to a paper feeding path in conjunction with the engagement and disengagement operation of the stopper member with respect to the sleeve.