JPS59190130A - Device intermittently generating paper conveying force - Google Patents

Abstract

PURPOSE:To prevent paper jamming, etc., from being generated due to the overrunning of easily bent paper such as thin paper by detecting the conveyed paper between a conveying belt and a paper guide and making the paper free on the belt while lifting the guide. CONSTITUTION:Paper is nipped and pulled in from an inlet part between a conveying belt 11 and a magnetic ski guide 13. And, it is conveyed in the direction, of registration gate 4 the tip thereof jumps out from an outlet part between the belt 11 and the guide 13, and sensing this by a paper sensing sensor 15 causes an electromagnetic solenoid 14 to be operated to lift the guide 13. And, the nipped state is released, the paper is conveyed to a gate 4 by means of the belt 11, and its tip part strikes on the gate to permit it to be stopped. Then, issuing a signal for opening the gate 4 causes the electromagnetic solenoid 7 to be operated to control an operating lever 8 and thereby a disc 5 is anticlockwise turned and opened to permit the paper to pass through while allowing the guide 13 to be lowered. In such a way, the overrunning of the paper upon striking on the gate can be avoided along with the prevention of the generation of paper jamming.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an intermittent generating device for Z and sheet conveying force in copying racks and the like.

(Conventional technology) Conventional v! As shown in Figure 1, as a device for intermittently controlling the conveyance force on the paper in the 89, etc., a registration game is installed at an appropriate position on the paper conveyance path.
1''! After weakening the paper 3 and passing the leading edge of the paper between the slip rolls 2 and 2', the paper 3 is passed between the slip rolls 2 and 2', and while the progress is temporarily stopped by making a blank contact with the registration gate 1, the rear of the paper 3 is passed between the slip rolls 2 and 2'. 2, 2
' is used to send the paper 3 in one registration direction to curl it, and then open the paper 3 at the right timing to cause the paper 3 to fly out in the advancing direction due to its elasticity.

However, even if the nipping force of the slip rolls 2 and 2' is weak, the paper intermittent generating device with such a configuration has the paper 3 nipped between the slip rolls 2 and 2', and the shift 5Δ is also low. If the leading edge of the paper 3 hits the registration gate 1 and stops, the slip roll 2.2' may slip in a state where the paper is curled to a certain extent because it is a relatively stiff paper. However, in the case of weak paper such as thin paper, the conveying force of the slip rolls 2, 2' is not strong enough to overrun the paper and cause damage, such as paper shirts, etc. It had the disadvantage of causing

(Object of the Invention) The present invention was developed in order to eliminate the drawbacks of the above-mentioned conventional paper intermittent generation device, and is to provide an endlessly rotating conveyor belt in the paper conveyance path for the registration gate. The belt is arranged horizontally through a pulley in the conveying direction, and a magnetic paper guide that is raised and lowered by an electromagnet is provided above the belt, and a paper detection sensor is installed between the registration gate and the conveyor belt. By providing a nip between the conveyor belt and the paper guide, the paper is transported in the registration direction, and when the paper detection sensor detects this, the signal activates the electromagnet of the paper guide to raise the paper guide. Then, the paper is conveyed to the registration in a free state on the conveyor belt, and when the leading edge of the paper hits the registration and progress is stopped, only the conveyor belt continues to rotate. At the same time, a registration gate opening signal is generated, and when the gate opens, the solenoid is activated again to lower the paper guide onto the transport belt, nip the trailing edge of the paper, and send it out in the forward direction. An object of the present invention is to provide an intermittent force generator.

(Structure of the Invention) Below, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 2 is a schematic diagram showing an embodiment of the paper conveyance force intermittent generating device of the present invention.

A registration gate 4 is placed at a suitable location on the paper conveyance path. The registration gate 1 is fixed to one outer periphery of a rotatably provided disc 5, and
A link 6 is vertically connected to the lower part of the
1) The link 9 is connected to the operating rod 8 of the electromagnetic solenoid T with a spring 10.
Pull it parallel to the operating direction of the operating rod 8. In addition, at the lower end of the paper transport path in front of the registration gate 40, an endlessly rotating transport belt 11 is arranged horizontally in the paper transport direction using pulleys 12 and 12'. A magnetic ski guide 13 is arranged so as to be able to move up and down, with both ends corresponding to the leading edge of the paper being bent into a curved shape. The electromagnetic solenoid 14 is used for lifting and lowering operations. Furthermore, a paper detection sensor 15 is arranged at a suitable location on the conveyance path between the registration gate 4 and the conveyance belt 11, and the sensor 15 detects the paper, and a solenoid is activated by l emitted from a controller (not shown). 14, and the solenoid 14 can also be operated by the opening signal of the registration gate 4 via the controller.

The present invention is constructed like a beam. Next, its operation will be explained.

Assume that the paper is conveyed along the conveyance path from the input direction indicated by the arrow. At this time, the registration gate 4 is in a closed state, and the magnetic ski guide 13 is also lowered onto the conveyor belt 11. Thus, the paper is nipped and drawn in from the entrance of the conveyor belt 11 and the magnetic ski guide 13, and is pulled into the registration gate 4 by the magnetic force of the magnetic ski guide 13 and the rotation of the conveyor belt 110.
It is conveyed in a hole shape on the conveyor belt 11 in the direction. Then, the leading edge of the paper jumps out in the direction of travel from between the exits of the other end of the conveyor belt 11 and the other end of the magnetic ski guide 13, and when the paper sorting sensor 15 detects this, the signal is sent to the controller. Send it to? , the electromagnetic solenoid 14 is operated in response to a signal issued by the controller to lift the magnetic ski guide 13 to release the paper from the nip state, and simply place the paper on the conveyor belt 11 and transfer it to the registration gate 4. Carry it towards the target and hit it with its tip to stop its progress. The sheet whose advance is stopped by the registration gate 4 is placed on the conveyor belt 11 in a free state, while the conveyor belt 11 continues to rotate. When an opening signal for the registration gate 4 is issued, the electromagnetic solenoid T is activated and the disc 5 is rotated in the figure through links 9 to 6 by operating the operating rod 8. It opens by rotating clockwise, allowing the paper to pass through. At the same time, the release signal is also sent to the electromagnetic solenoid 14 via the controller, causing the magnetic ski guide 13 to return to its original position and nip at the rear of the paper, sending it in the registration direction. At the same time, the next sheet of paper is coming in.

(Effects of the Invention) The present invention is constructed and operates as described above.
Since the sheet being conveyed can be completely free on the conveyor belt 11 before reaching the registration gate 4, when the leading edge of the sheet hits the gate, it will overrun and cause damage. Therefore, if this device is used in place of slip rolls in registration devices such as copying machines, damage caused by excessive conveyance force of thin paper, etc., can be reduced compared to conveyance using conventional slip rolls with weak nipping force. Since it can be destroyed significantly, the occurrence of paper jams and the like is greatly reduced, which is extremely effective in improving the reliability of copying machines and the like.

It should be noted that there is no reason why the present invention should be limited to the above-mentioned embodiments. For example, the opening/closing mechanism of the registration guide is sufficient as long as the guide itself can be opened and closed at fixed time intervals. It goes without saying that there is no need to be particular about such a mechanism, and the shape of the magnetic ski guide 12 may also be other shapes.

[Brief explanation of drawings]

Figure 1 shows a schematic diagram of a paper conveyance force intermittent generating device used in conventional copying machines such as V4. FIG. 2 is a schematic structural diagram showing one embodiment of the paper conveyance force intermittent generating device of the present invention. In the diagram, 4... Registration guide, 11...
・Transport belt, 13 ・Fist ・Magnetic ski guide 114
...Solenoid, 15...Paper detection sensor. Patent applicant Fuji Xerox Co., Ltd.-9--201
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Claims (1)

[Claims] In the paper conveyance path of a copying machine, etc., an endless rotary conveyor belt is placed horizontally in the conveyance direction using pulleys at an appropriate position on the lower surface in front of the registration gate, and the ground surface of the belt is A paper guide that can be raised and lowered by a solenoid is provided, and a paper detection sensor is provided at a suitable location between the registration gate and the conveyor belt, so that the paper is nipped by the conveyor belt and the paper guide and is not registered. The paper detection sensor detects the paper being conveyed toward the gate, and the solenoid is operated in response to the signal to lift the paper guide to release the nip from the paper, and in that state, the paper is conveyed to the registration gate. , and is capable of being stopped by the gate.