JPH03124647A - Feeder - Google Patents

Abstract

PURPOSE:To facilitate releasing the jam of a form and resetting the form by reversely rotating a drive motor based on a jam detection signal which is issued upon detecting the clogging of the form on the part of a jam detection sensor arranged at the downstream of a separation means, and thereby constituting said draw-out means to be separated from the form so as to be restored to its original position. CONSTITUTION:A form jam detection sensor 27 is provided at the further down stream side of a separation means 26 arranged at the downstream side of a draw-out means 23. In the second place, when the jam detection sensor 27 detects no form even after a specified time has elapsed since the draw-out means 23 has come in contact with the form, a jam signal is issued, and a drive motor is reversely rotated while the draw-out means 23 is separated from the form so as to be restored to its original position so that an abnormal condi tion is displayed thereafter. In addition, as soon as the draw-out means 23 is separated from the upper surface of the from, a separation body 26 is also separated simultaneously from a feed rotor 25 so that the jammed form is thereby removed from a device with ease.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device for feeding original paper onto a platen of a copying machine, for example.

[Prior Art] As a conventional paper feeding device, for example, Japanese Patent Laid-Open No. 60-2045
According to the above-mentioned publication, which is disclosed in Publication No. 30,
A document feed start roller that can take two states: in contact with the document on the document tray and in a separated state; a document feed roller located downstream of this document feed start roller; The anti-feeding rollers are connected to each other by mechanical means, and a clutch means is interposed between these roller groups and their drive source to create a cut-off state only when the roller group is in the starting position. In a paper feeding device that feeds original documents, the device includes: means for rotating a drive source for a predetermined period of time when power is turned on; means for checking whether or not a document feeding condition is satisfied after the predetermined time period; and means for re-driving the drive source after the feeding conditions are satisfied.

[Intelligence to be Solved by the Invention] However, in the conventional paper feeding device described above, after the device is temporarily stopped due to a jam or the like, it returns to the initial state when restarting, and when a jam occurs, the feeding means does not return to its initial state, and the conventional problem that it takes time and effort to remove jammed paper has not been solved.

[Purpose of the Invention] The present invention has been made in view of the problems in the conventional technology, and therefore provides a paper feeding system with improved operability by easily removing and resetting jammed paper when a jam occurs. The purpose is to provide equipment.

[Means for Solving the Problems] The gist of the present invention to achieve the above object is as follows: (1) A drive motor capable of forward and reverse rotation; a separating means comprising: an edge-drawing means for contacting and feeding out the sheet; a feeding rotary body for receiving and feeding the fed-out sheet; and a separation means disposed in close proximity to the feeding rotary body for separating the second sheet and subsequent sheets; On the downstream side of the separating means, there are provided a resist rotating body that arranges the posture of a single sheet of paper and sends it out, a conveyance means that receives and conveys the paper, and a discharge means that ejects the paper to the outside. A paper jam detection sensor disposed on the downstream side of the separating means reverses the drive motor in response to a paper jam or a jam detection signal, and moves the feeding means away from the paper to return to the initial position. A paper feed device characterized in that the paper feed device is configured to return to the original state.

(2) The paper feeding device according to claim (1), wherein the jam detection sensor does not detect the paper within a predetermined time and the abnormality display is performed after the feeding means returns to the initial position by reversing the drive motor. .

(3) The paper feeding device according to (2), wherein the separating body of the separating means starts rotating in reverse at the same time that the drive motor starts rotating in reverse due to abnormality detection of the jam detection sensor.

exists in

[Operation] When sheets are placed on the stacker and the apparatus is started, the drive motor rotates in the normal direction, the feeding means contacts the uppermost sheet of sheets, the sheets are fed, and paper feeding begins.

A paper jam detection sensor is provided further downstream of the separating means disposed downstream of the feeding means, so that even if a predetermined period of time has elapsed after the feeding means contacts the paper, this jam detection sensor is not activated. When the paper is not detected, a signal is transmitted, the drive motor rotates in reverse, the feeding means leaves the paper, returns to the initial position, and then an abnormality display is displayed.

Further, at the same time as the feeding means separates from the upper surface of the paper, the M member, which was disposed close to the feeding rotary body, also separates from the feeding rotary body, so that the jammed paper can be easily taken out from the apparatus. I can do it.

Furthermore, since the feeding means has already returned to the initial position when a jam occurs, it does not take much time to restart the paper, and together with the ease of handling the jammed paper, the operability is significantly improved.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

(Configuration) In this embodiment, as shown in FIG.
This will be described as a paper feeding device that supplies document paper to the platen 2E.

The paper feed device 10 includes a paper feed stacker 11 on which a document is placed;
A feeding section 20 that separates the originals set in the paper feed stacker 11 one by one and sends them out to the platen 2'', and a conveying means that conveys the sheets sent out from the feeding section 20 along the platen 2. The transport unit 100 and the transport unit 1
A paper ejecting section 110 as a discharging means for reversing the original document conveyed over the platen 2 by the O and ejecting it from the front side to the 81F, a paper ejecting stacker 12 that stores the original document ejected from the paper ejecting section 110, and a paper ejecting stacker 12 (not shown). The control device includes a control device and a drive device shown in FIG.

Note that the paper feed stacker 11 is equipped with Ri, which is movable in equal amounts in opposite directions so as to always hold the document at the center in the width direction.
A t-guide is provided.

The feeding unit 20 includes a paper feeding guide 21.2 that forms a paper feeding path.
2, a feeding means for feeding out the original document placed in the paper feed stacker 11, such as a big-a-knob roller 23;
The empty sensor 24 detects whether or not a document is set on the paper feed stacker 11, the paper feed roller 25 is a feeding rotary body that rotates in the paper feed direction, and the paper feed roller 25 is used to feed the paper. A separating roller 26 is a separating roller 26 that rotates in a direction to remove the original that follows the original that is being papered, and a size detection sensor 27 that detects the size of the original in the width direction.
, a registration sensor 28 that detects when the document reaches fl+ at the registration rotation body, and a registration rotation body such as registration rollers 29 and 29a.

Note that the paper feed roller 25 is attached to a rotating shaft 40 shown in FIG. 2 via a one-way clutch. Further, the paper feeding roller 25 and the separating roller 26 constitute a separating means.

Further, the pink-up roller 23 has its rotating shaft 42 supported by a pair of arms 44 (supporting members) whose base ends are attached to the rotating shaft 10 via a spring clutch 43. The signal is then transmitted to gears 58, 59, and 60.

The spring clutch 43 is configured to idle if a load of a predetermined value or more is applied during normal rotation of the drive motor 30, which will be described later.

The conveyance unit 100 includes a pair of rollers 101 and 102, a conveyor belt 103 which is stretched over these O-rollers 101 and 102, and a conveyor belt 103 that is attached to a platen 2.
It is provided with a plurality of press rollers 104 that press against the sides.

Note that, as shown in FIG. 2, the rotation shaft 45 of the roller 101
A pulley 46 is attached to the rotating shaft 47 of the roller 102, and a pulley 48 is attached to the rotating shaft 47 of the roller 102.

The paper ejection unit 110 includes a paper ejection guide 111 that forms a paper ejection path.
．． 112 , a synthetic resin sheet 113 attached to the lower end of the paper ejection guide 112 , and a pinch roller 11 that is housed in the paper ejection guide 112 and pressed against the conveyor belt 103
4, a paper discharge sensor 115, a paper discharge roller 116, and a plate spring 117 pressed against the paper discharge roller 116.

As shown in FIG. 2, a pulley 50 is attached to the rotating shaft 49 of the paper discharge roller 116, and this pulley 50 is connected to the pulley 48 by a round belt 51.

The control device includes, for example, a microcomputer, and drives and controls a drive motor 30, which will be described later, based on signals from sensors 24, 27, 28, and 115 and the copying surface 1.

As shown in FIG. 2, the drive device includes a drive motor 30 that can freely rotate forward and backward, a pulley 32 attached to a rotating shaft 31 of the drive motor 3o, and a timing belt 35 that connects the pulley 32 and the pulley 34. A gear 38 attached to the rotating shaft 33 via a spring clutch 37, and this gear 3
8, a gear 41 that meshes with these three gears, a gear 52 that meshes with the gear 41, and a separation roller 2.
A gear 54 is attached to the rotating shaft 53 of 6 and meshes with the gear 52, a gear 36 is attached to the rotating shaft 33 via a one-way clutch, and a gear 54 is attached to the rotating shaft 55 of the registration roller 29 and meshes with the gear 36. Gear 56 and
The gear 57 meshes with the gears 46 and 56.

Note that the spring clutch 37 is designed to idle if a load of a predetermined value or more is applied when the drive motor 30 is reversed.

In addition, when the drive motor 30 rotates in the normal direction, the pickup roller 2
3. Drive motor 30 for paper feed roller 25 and separation roller 26
The first transmission means is a member that transmits the rotational force of
03. A member that transmits the rotational force of the drive motor 30 to the paper ejection roller 116 is used as a second transmission means.

(motion) In the above configuration, this device operates as follows.

First, when a document is set in the paper feed stacker 11 with its surface facing downward, the empty sensor 24 detects the document, and the document can be automatically fed.

In such a state, when the paper feed button (not shown) of the copying machine 1j) or the paper feed bag W10 is pressed, the drive motor 3
0 rotates forward.

As a result, the rotating shaft 40.53 rotates normally via the pulley 32, timing belt 35, pulley 34, and gears 38, 39, 41, 52, and 54.

The arm 44 descends due to the forward rotation of the rotating shaft 40 (indicated by the solid line arrow in FIG. 2), and the pickup roller 23
touches the original. As a result, a load is applied to the spring clutch 43 and the spring clutch 43 slips, thereby maintaining the state in which the pick roller 10-ra 23 is in contact with the document.

Further, due to the forward rotation of the rotating shaft 40, the separation roller 26 rotates in a direction that prevents the document from being fed.1. The document following the document fed by the paper feed roller 25 is rejected, and the document is separated into one sheet.

By the way, since a one-way clutch is interposed in the gear 36, the gear 36 does not rotate when the drive motor 30 rotates in the normal direction.In such a state, the registration sensor 28 detects the leading edge of the document within a predetermined time from the start of paper feeding. If not, the drive motor 30 is stopped.

By stopping the drive motor 30, the pickup roller 23
, the paper feed roller 25, and the separation roller 26 also stop.

After a short period of time has elapsed, when the drive motor 30 is reversed by a predetermined amount, the arm 44 rises and the pickup roller 23 separates from the document. When the arm 44 hits the stopper 71, a load is applied to the spring clutch 37 and the gear 38 stops rotating. Therefore, the pickup roller 11 and paper feed roller 14 are stopped while the pickup roller 11 is raised. On the other hand, due to the reverse rotation of the motor 30, the rotating shaft 3
The rotational force of 3 is transmitted to gear 36, and gear 56.57.4
6, the conveyor belt 103, and the round belt 51, the registration rollers 29, the conveyor belt 103, and the paper ejection roller 116 rotate.

After the reverse rotation is completed, the drive motor 30 is stopped, and a jam indicator on the side of the copy bag 'f11 or the paper feed bag Wi10 (not shown) is turned on.

The flow of operations after the occurrence of a jam is shown in the flowchart of FIG.

[Effects of the Invention] According to the paper feeding device according to the present invention, it has a drive motor capable of forward and reverse rotation, a feeding hand [q that can approach and separate from the sheets on the stacker, and a feeding hand [q] that separates the fed sheets one by one. In a paper feeding device equipped with a separating means for feeding paper, a jam detection sensor disposed downstream of the separating means reverses the drive motor in response to a jam detection signal that detects a paper jam, and separates the feeding means from the paper. Since the feeding means is configured to return to the initial position immediately after a jam occurs, it is possible to easily release the jam and reset the paper. Since the jam display is displayed after the machine is separated from the machine and returned to its initial position, 1. Power users can quickly stop the machine, etc.
This does not make clearing the jam more difficult. In addition, since the separating body of the separating means is separated from the feeding rotary body when the jam detection sensor detects an abnormality, the process of clearing the jar 14 becomes easier, and the device The operability of the system can be significantly improved.

[Brief explanation of the drawing]

1st ['2! - No. 317I show an embodiment of the present invention, and FIG. 1 is a sectional view showing a schematic configuration of a paper feeding device;
FIG. 2 is a block diagram of the drive device of the paper feeding device, and FIG. 3 is a flowchart 1 to 4 showing an example of control. 10 Paper feeding device 11 Stacker 20 Feeding section 23 Pick up roller (I! pulling out means) 25 Feeding roller (rotating body for feeding) 26 Minute M roller (separating body) 28 Two registration sensors, 29a Registration roller (rotating body for registration) ) 30 Drive motor 100 Transport section (lfi transport means) 110 Paper discharge section (discharge means)

Claims (3)

[Claims] (1) A drive motor capable of forward and reverse rotation, a feeding means that feeds out the paper in contact with the top surface of the paper on the stacker when the drive motor rotates in the normal direction, a rotating body for receiving and feeding the fed paper, and a feeding mechanism for this feeding. a separating means consisting of a separating body disposed close to the rotary body and separating the second sheet and subsequent sheets; and a resist rotary body that arranges the orientation of the single sheet of paper sent and sends it out on the downstream side of the separating means. A paper jam detection sensor disposed downstream of the separation means detects a paper jam when the paper jam is detected. A paper feeding device characterized in that the driving motor is reversely driven by a signal, and the feeding means is separated from the paper and returned to an initial position. (2) The paper feeding device according to claim (1), wherein the jam detection sensor does not detect the paper within a predetermined time and the abnormality display is performed after the feeding means returns to the initial position by reversing the drive motor. . (3) The separating body of the separating means is separated from the feeding rotary body at the same time that the drive motor starts rotating in reverse due to abnormality detection of the jam detection sensor. 2) The paper feeding device described.