JPH0611627B2 - Registration device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a registration device, and more specifically, intermittently feeds a sheet from a sheet feed tray and accelerates the sheet with a slip roll to register rolls. The present invention relates to a registration device that sends the sheet to the next sheet processing step by the register roll.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a registration device that intermittently feeds a sheet from a sheet feed tray to a next sheet processing step at a predetermined timing.

This conventional registration device is classified into a type that uses a register roll and a type that uses a register gate.

FIG. 1 shows a copying machine equipped with a conventional registration device employing a register roll.

In this copying machine, according to the rotation of the belt-shaped photosensitive member 1, first, a charge corotron 2 uniformly applies an electric charge on the surface of the belt-shaped photosensitive member 1, and then a flash exposure 3 is performed to platen the platen 4 on the surface of the belt-shaped photosensitive member 1. Document 5 placed on top
Forming an electrostatic latent image 6 corresponding to the image information, and then developing the electrostatic latent image 6 into a visible image by the developing device 7. Thereafter, the visible image is transferred from the paper feeding unit 9 by the transfer corotron 8. Transfer to the supplied paper 10.

Further, in this copying machine, the belt-shaped photoconductor 1 and the belt-shaped photoconductor 1 are removed by the static elimination corotron 11 after the transfer.
The residual toner on the surface is electrically neutralized, and then the residual toner on the surface of the belt-shaped photoreceptor 1 is cleaned.
2 to clean the surface of the belt-shaped photosensitive member 1 and further irradiate the surface of the belt-shaped photosensitive member 1 with a charge eliminating lamp 13 to completely eliminate the charge, and then again to charge the surface of the belt-shaped photosensitive member 1 by the charging corotron 2. Is charged, and the above operation is repeated.

By the way, the registration device 14 in this conventional copying machine is provided with a register roll 16 and a slip roll 17 on the upstream side of the installation position of the transfer corotron 8 in the paper transport path 15 for the paper 10.

According to this registration device 14, the paper 10 sent from the paper feed tray 18 by the paper delivery roll 19 after the copy start button (not shown) is operated.
Is sent to the slip roll 17 along the paper transport path 15 by the transport roll 20 and the like.

The paper 10 sent to the slip roller 17 is accelerated by the slip roller 17 and sent to the register roll 16.

The paper 10 sent to the register roll 16 is sent to a transfer process which is the next paper processing process by operating a register roll driving electromagnetic clutch (not shown) at a predetermined timing.

Note that the above-mentioned predetermined timing means register roll 1
It is the timing when the end of the sheet 10 fed in from the sheet 6 in the conveying direction and the end of the electrostatic latent image 6 on the surface of the belt-shaped photoreceptor 1 in the traveling direction are matched in the transfer step.

Further, in FIG. 1, reference numeral 21 is a fixing device for fixing the paper transferred in the transfer step, and reference numeral 22 is a paper discharge roll for discharging the fixed paper to a paper discharge tray 23.

By the way, in the copying machine having the above-described structure, when copying is continuously performed, the sheets are sequentially fed from the sheet feeding tray 18 at a predetermined timing so that a predetermined interval is provided between the conveyed sheets. In the case of processing continuous copying at high speed, the interval between the sheets is set to be narrower and the sheets are sent out one after another from the paper feed tray 18.

On the other hand, in the copying machine having the above-described configuration, when the paper is fed from the paper feed tray 18 by the paper feed roll 19, two or more papers may be taken out from the paper feed tray 18 in a state where they overlap each other. is there.

In such a case, since the upper sheet of the overlapping sheets is in contact with the sheet feeding roll 19, the upper sheet is unsupported from the sheet feeding tray 18 to the sheet conveying path 15, but the lower sheet is not supported. Since the progress is suppressed by friction with the paper stored in the paper feed tray 18, the edge portion is occupied in a state of protruding from the paper feed tray 18 in the feeding direction.

As shown in FIG. 1, when the sheet transport path 15 is curved near the sheet feed tray 18 with a small curvature, the lower sheet among the overlapping sheets is the lower sheet as described above. In addition to the friction with, the front end of the sheet comes into contact with the passage wall surface in the curved portion of the sheet conveying path 15, so that the sheet is stopped in a state of protruding from the sheet feeding tray 18.

During continuous copying in the copying machine, when the edge of the paper on the paper feed tray 18 pops out in the feeding direction due to the double feeding of the paper as described above, Even if the paper is sent out from the paper feed tray 18 at a predetermined timing, the paper is carried in the paper carrying path 15 while being advanced from the normal position.

As a result, the front-rear spacing between the above-mentioned paper and the previously fed paper varies, in other words, the front-back spacing between the trailing edge of the preceding paper and the front edge of the following paper should be preset. It becomes narrower than the predetermined size.

As a result, if the preceding paper is completely sent out from the register roll 16, the register roll 1
The subsequent sheet to be sent to 6 collides with the sheet being sent by the register roll 16 while being accelerated by the slip roller 17.
As a result, there is a problem that the edges of both sheets are broken and the damage to the sheets occurs.

On the other hand, as described above, some conventional registration apparatuses use a register gate.

The registration device (not shown) is the register roll 1 in the registration device 14 described above.
In place of No. 6, a register gate (not shown) is installed, and the register gate is operated at the same predetermined timing as in the case of the register roll 16 to open and close the paper conveyance path 15 at the above predetermined timing. It is a thing.

That is, in this registration device, similarly to the case of the registration device 14, the sheet accelerated and sent by the slip roll is once received by the register gate, and the sheet transport path is opened by the register gate. At this time, the sheet received by the register gate is sent to the next sheet processing step.

However, even in the registration device using such a register gate, as in the registration device 14 using the register roll 16, two or more sheets are fed from the paper feed tray during continuous copying in the copying machine. When the above sheets are taken out in an overlapping manner, the front-to-back interval between the preceding sheet and the succeeding sheet becomes smaller than the predetermined size as described above, and thus the sheet received by the register gate is The papers collided with each other, which inevitably caused the papers to be damaged.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a registration device that does not damage a sheet.

[Structure of Invention]

In the present invention, in order to achieve the above object, a sheet accelerated and fed by a slip roller is received by a gate protruding from a belt and conveyed to a register roll.

〔Example〕

Hereinafter, the configuration of the registration apparatus according to the present invention,
A detailed description will be given with reference to the accompanying drawings.

FIG. 2 shows an embodiment of the registration device according to the present invention.

In the registration device 30 of this embodiment, the register roll 32 and the slip roll 33 are installed at a predetermined interval in the paper transport path 31, and the register roll 3 is provided.
A belt 34 is installed between the 2 and the slip roll 33.

The belt 34 has a plurality of gates 35 projecting from the outer peripheral surface thereof and is wound around pulleys 36 and 37.

Here, the pulley 36 is installed by being loosely fitted to a shaft (not shown) that supports the register drive roll 32a, and the pulley 37 is integrally formed with the pulley 37a.

Further, the registration device 30 includes a belt 34.
As will be described later, a control means 38 for controlling driving is provided, and the control means 38 is a stepping motor 38a.
And a control circuit (not shown).

A pulley 38b is installed on the stepping motor 38a, and a belt 39 is wound around the pulley 38b and the pulley 37a.

That is, the power of the step motor 38a is transmitted to the belt 34 via the pulley 38b, the belt 39 and the pulleys 37a, 37, whereby the gate 35 of the belt 34 is moved along the paper transport path 31.

In this registration device 30, the peripheral speed of the register driving roll 32a is V0, the moving speed of the gate 35 is VG, and the peripheral speed of the slip pinch roll 33a is V.
When S is set, each of them is set so that V0 ≦ VG <VS.

In FIG. 2, 32b is a register pinch roll, 33b is a slip driving roll, and 40 is a sensor for detecting the gate 35 of the belt 34.

Next, the operation of the present embodiment will be described, and the configuration of the present embodiment will be clarified.

Now, in a copying machine equipped with such a registration device 30, when the power is turned on, the belt 34 is driven, the sensor 40 detects passage of the gate 35, and the control means 38 controls based on the detection signal. It is stopped in place by the circuit.

After that, when a copy start button (not shown) of the copying machine is operated, the paper is intermittently sent from the paper feed tray (not shown) to the slip roll 33.

Further, these sheets are accelerated by the slip rolls 33 and sent to the belt 34 installation area of the sheet conveyance path 31.

At this time, the control circuit detects a sheet that is accelerated and sent out by the slip roll 33 by a sensor (not shown), and the gate 35 of the belt 34 is activated before the sheet reaches the point A of the sheet conveyance path 31. When the point A is reached and the gate 35 precedes the sheet, a start signal is output and the step motor 38a is drive-controlled.

Thereby, the gate 35 conveys the sheet to the register roll 32 while receiving the sheet.

When the paper reaches the register roll 32, the gate 35 is ejected from the paper transport path 31.

At that time, an electromagnetic clutch (not shown) for transmitting power to the register drive roll 32a is operated, whereby the register roll 32 nips the above-mentioned sheet and sends it to the next sheet processing step.

Here, the electromagnetic clutch is similar to the case of the copying machine shown in FIG. 1 in the conveying direction side end of the sheet sent out from the register roll 32 and the advancing direction side of the electrostatic latent image on the belt-shaped photoconductor surface. The edge is operated by the control circuit at the timing matched in the transfer process.

The gate 35 that has escaped from the paper transport path 31 is detected by the sensor 40, stopped at a predetermined position by the control circuit, and waits for the next start signal from the control circuit.

According to the operation mode of the registration device 30 as described above, since the sheet is conveyed to the register roll 32 while being held by the gate 35, when copying is continuously performed, two sheets are fed from the sheet feeding tray. Even if the front-to-back distance between the preceding and succeeding sheets becomes narrower than the predetermined size due to the above-mentioned sheets being taken out in an overlapping manner, the following sheet may collide with the preceding sheet. Therefore, it is possible to send the sheet to the next sheet processing step without inadvertently damaging the sheet.

In the above embodiment, the control means 38 is configured by using the step motor 38a or the like, but the present invention is not limited to this, and the control means of the belt 34 may be configured by using a servo motor or the like. good.

With this configuration, the moving speed of the gate 35 of the belt 34 can be freely changed by the servo motor.

Thus, for example, when the sheet received by the gate 35 and conveyed is nipped by the register roll 32, the moving speed of the next gate 35 is increased to quickly and
It is also possible to position the next gate 35 at a slight distance behind the sheet (direction opposite to the conveying direction).

By doing so, the following sheet of paper will not completely collide with the paper in front of it.

Further, if the timing at which the gate 35 reaches the register roll 32 is set to the operation timing of the electromagnetic clutch of the register driving roll 32 by employing the servo motor, the electromagnetic clutch becomes unnecessary, and the register roll 32 becomes unnecessary.
Can be continuously driven to rotate.

By doing so, the paper can be fed from the register roll 32 continuously rather than intermittently, and it is possible to sufficiently cope with the case where the paper is to be carried out at high speed.

〔The invention's effect〕

As described above, in the registration device according to the present invention, since the sheet is conveyed by being received by the gate, the preceding sheets do not collide with the following sheets, and therefore the sheets are not It can be sent to the next paper processing step without causing damage.

[Brief description of drawings]

FIG. 1 is a copying machine equipped with a conventional registration device, and FIG. 2 is a conceptual diagram showing an embodiment of the registration device according to the present invention. 30 ... Registration device, 31 ... Paper transport path, 32 ... Register roll, 33 ... Slip roll, 34 ... Belt, 35 ... Gate, 36, 37a, 37b ... Pulley, 38 ... Control means , 38b ... Step motor, 39 ... Belt, 40 ... Sensor.

Claims (1)

[Claims] 1. A paper is intermittently fed from a paper feed tray,
In a registration device in which the paper is accelerated by a slip roll and sent to a register roll, and the paper is carried out to the next paper processing step by the register roll, a belt having a gate protruding on the peripheral surface is The gate is installed between the register roll and the slip roll so that the gate is moved along the paper transport path, and the paper is transferred to the belt setting position of the paper transport path before the paper reaches the belt setting position. A registration device, characterized in that a control means for controlling to drive the belt so that the gate enters the sheet conveying path is installed so that the sheet is received by the gate and conveyed.