JPS60204546A - Paper jam removing device - Google Patents

Abstract

PURPOSE:To facilitate removing a broken paper piece in the front sub-transport system by forcedly transporting paper by means of hard nip rollers until a paper detecting sensor detects the passing of the trailing end of the paper at a coupling position of the front and rear sub-transport systems in a paper jam removing device. CONSTITUTION:A paper jam removing device includes a recording paper detecting sensor 20 disposed at a coupling position of the front sub-transport system comprising rollers 1, 2, an endless belt 3, and skis-like pressing mechanism and the rear sub-transport system comprising transport rollers R1, R2 and transport guides G1, G2, G3, and means for detecting jamming of recording paper P1 at a position extending between both sub-transport systems according to a detection output of the sensor 20. The device further includes hard nip rollers R3 which are disposed before or behind the coupling position of both sub-transport systems and adapted to forcedly transport the jammed recording paper P1 from the time when a paper jam is detected until the sensor 20 detects the passing of the recording paper 0. The holding pressure of the rollers R3 are set larger than the pressing force of trigger rollers 6, 7 of the front sub-transport system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper jam removal device for recording paper in a recording paper transport system configured by connecting at least two sets of sub-transport systems, and more particularly, to The present invention relates to an improvement for completely and easily removing jammed recording paper at the connection position of the sub-transport system.

[Prior art]

Conventionally, various configurations have been known and implemented as a recording paper conveyance mechanism in a facsimile copying machine, and FIG. 1 shows an example of such a configuration. 1 is a schematic perspective view of a set of recording paper conveyance systems configured as shown in FIG. In other words, the first subsystem among the two sets of subsystems described above in FIG. A ski-shaped belt 3 consisting of a flat plate that presses recording sheets P and P selectively fed out from separate paper feed trays 4 and 5 by trigger rows 26 and 7, respectively, onto the endless belt 3. It consists of a pressing mechanism (hereinafter simply referred to as a ski mechanism) 8 and 9. Further, a second subsystem connected to the first subsystem is rotatably pressed against each other.
Conveyance rollers R1 and R consisting of pairs of rollers 10, 11 and 12.13, and these conveyance rollers R1°R1
and a plate-shaped conveyance guide G1 m G2 #GH that connects the first subsystem and the recording section. In such a configuration, each part constituting the first subsystem is fixedly arranged with respect to the main body of the device, and these first subsystems cannot be led out of the machine. . On the other hand, each part constituting the second saturation system is connected to the rail 14.1 with respect to the equipment main body.
5, and by sliding this support stand 16 in the direction of arrow A, the second saturation system is led out of the machine. It is equipped with a so-called 7 & 1 user function.

According to the recording paper transport mechanism having such a configuration, any selected recording paper, for example, recording paper P1, is moved by the trigger roller 60.
When the paper feed tray 4 is fed in accordance with the rotation, it is pressed against the endless belt 3 by the ski mechanism 8 (for the recording paper P2, the trigger roller 7, the paper feed tray 5, and the ski mechanism 9). At this time, the fluid is conveyed within the first subsystem following the movement of the endless belt 3, which has already been rotated by the rollers 1 and 2.

The hindlimb recording paper P1 is guided into the second subsystem through the conveyance guide Gsft connected to the first subsystem, and further includes the conveyance roller R1 and the conveyance guide Gs, G3 is sequentially conveyed and supplied to the recording section located at the rear.

Now, when observing the location where paper jams frequently occur in the conventional recording paper conveyance mechanism, it is found that due to its structure, the location straddles the first subsystem and the second subsystem, that is, the endless belt 3 and the conveyance guide. G1 most often occurs, and in such a case, the previous conveyance control is stopped, so if the recording paper where the paper jam force occurred is not promptly removed from the location, the next one will occur. Recording will no longer be possible. Conventionally, when a paper jam occurs as described above, the second subsystem is moved to the rail 14.
．． 15 to the outside of the machine together with the support stand 16, and in this state the jammed recording paper was removed. That is, the user mechanism in the second subsystem described above was incorporated into the main body of the device as a paper jam removal device.

However, according to the above-mentioned conventional paper jam removal device, when the recording paper straddles between the first subsystem and the second subsystem and causes a paper jam, and the rear end If the recording paper is held between the ski mechanisms 8 and 9 and the endless belt 3 in the second subsystem, the recording paper may be torn when the second subsystem is pulled out of the machine. A part of the piece of paper is
It often remained within the subsystem. Therefore, in order to remove this piece of paper, the second small pull system drawer L81CI! It is necessary to search inside the starvation system and remove the paper pieces, which is a complicated and difficult task, and if it is not possible to completely remove the paper pieces, the following procedure should be carried out. This has the disadvantage that it may cause paper jams to occur again at the relevant location during the recording operation.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances.When removing the paper jam 9 of recording paper at a position spanning between the saturation system of the FA1 and the second saturation system, the recording paper may be damaged and the An object of the present invention is to provide a paper jam removing device capable of avoiding the work of removing residual paper pieces in a paper jam system and achieving complete and easy paper jam removal.

[Structure of the invention]

Therefore, in the present invention, a sensor for detecting recording paper is provided at a connection point between the first and second subsystems, and a paper jam of the recording paper is detected from the detection output of the sensor. The Hard Nip Roller consists of a pair of rollers that grip the recording paper with strong pressure from the ski mechanism forward or backward.
) 't- is provided and is driven for a certain period of time after the paper jam is detected to forcefully eject the recording paper from the first subsystem and transfer the recording paper between the two subsystems. The above objective is achieved by making it impossible to cross over.

〔Example〕

Embodiments of the present invention will be described in detail below based on the accompanying drawings. FIG. 2 is a perspective view showing an example of a recording paper transport mechanism equipped with a paper jam removing device according to the present invention, and parts having the same functions as the conventional mechanism shown in FIG. 1 are denoted by the same reference numerals. Enter the symbol.

According to the conveyance mechanism shown in FIG.
A recording paper detecting sensor (hereinafter simply referred to as a paper detecting sensor) 20P is provided at a connecting position between the first subsystem and the second subsystem, for example, a reflective photosensor. Also, the second
1 which are rotatably pressed against each other near the rear of the connection position with the first subsystem in the subsystem.
Consisting of a pair of rows 221 and 22, if necessary
Between the rollers 2.1 and 22, there is a hard Ni-no-ra (Hard Ni-no-ra) that can establish a gripping pressure greater than the paper gripping pressure (Nsp pressure) between the ski mechanisms 8 and 9 and the endless belt 3.
d Nip Roll@r ) Rs (NIP pressure 2k
g) are provided.

Further, FIG. 3 is a block diagram showing the configuration of the control section of the apparatus according to the present invention.Hereinafter, the mounting control operation will be described in detail with reference to FIG. 3 and FIG. 2.

First, for example, the recording paper Pa selected is ejected from the paper feed tray 4 by the trigger roller 6, and further conveyed between the ski mechanisms 8 and 9 by the rotation of the endless belt 3, and then transported to the paper detection sensor 20. When passing near the installation position, the paper detection sensor 20 receives the light reflected by the recording paper Pt, and a specific detection method is obtained. Here, if the recording paper pi is being conveyed normally, the recording paper passes over the paper detection sensor 2o after a certain period of time has elapsed, so the paper detection output of the paper detection sensor 20 also follows this. disappears accordingly. However, if a paper jam occurs at that location, the conveyance of the recording paper P1 will be stopped, so the paper detection sensor 20
The paper detection output is as expected. Therefore, in the paper jam detection circuit 23 to which the output of the paper detection sensor 20 is input, when the paper detection output is input for more than the above-mentioned certain period, this is detected as an occurrence of a large number of paper jams, and the paper #il! i! The occurrence detection output is sent to the control circuit 2 of the entire device.
4 and the counter 25. Here, the control circuit 24 sends a new control signal to the hard nig roller drive circuit 26 from the time when the paper jam detection output is input. Then, in the driving circuit 26, from the time when the control signal is input, the preset time (MAXI sec.
) Counter y 7' (The motor 210 is rotated until the number N is input, and the hard nig roller Rm t
By driving the recording paper PK where paper #I has occurred at a position spanning the first and second subsystems, a stronger Nip pressure is applied to the recording paper PK where paper jam has occurred before the occurrence of the paper jam is detected as described above. After the rear end is completely extracted from the first subsystem, the hard disk is forcibly conveyed.
Stop driving the 7° roller Rs. That is, the drive control of the hard nip roller drive circuit 26 at this time includes the control to press the hard nip roller Rs&, for example, the roller 21 to the roller 22 with a pressure of 9Nlp (approximately 9 to 2), and the drive of the a-221. The motor 210 is made of the above Ni
This is done by executing a control partner that drives the recording paper P with a torque strong enough to transport the recording paper P while maintaining the p pressure.

After completely extracting the jammed recording paper P1 between the first and second subsystems from within the first subsystem, the paper within the first subsystem is removed. If there is a jam in the recording paper P1, the ski machines 1118 and 9 are manually pushed open to remove the jam.

On the other hand, regarding the paper pack (Pl) taken into the second subsystem, the second subsystem is transferred to the support stand 16 and outside the machine together via the rails 14 and 15. and remove the nine jammed sheets (Ps) in this state. At this time, as mentioned above, since the recording paper P1 does not extend between the first and second subsystems, it may be damaged when Todoroki pulls out the second subsystem. The packed paper (
PR) can be removed from the second subsystem. Also, once a paper jam is detected, the driving force of other conveyance systems is stopped by a clutch, etc., and the subsequent recording paper is stopped. Since the conveyance is stopped, there is no possibility that many sheets of recording paper will become jammed at the relevant location.

Incidentally, the above-mentioned No-Donitsorola R3 is the first and second
The same function as above can be achieved even if it is placed in front of the subsystem connection point.

〔Effect of the invention〕

As explained above, according to the paper jam removal device of the present invention,
Paper jam 9 located between the first and second subsystems
The recording paper on which the paper jam occurred is stored in the first
and the second subsystem, the paper is conveyed by the hard roller for a certain period of time until the paper detection sensor detects the passage of the trailing edge of the paper, and the paper is transported between the first and second subsystems.
The jammed paper is removed after it is forcibly transported to a position where it does not straddle the subsystems of the second subsystem.
The paper jam can be removed reliably without damage to the paper jam when the subsystem is pulled out from the device main body, and there is no accompanying paper fragments remaining in the first subsystem. This has the excellent effect of making it easier to remove paper jams as the amount of treatment can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the configuration of a recording paper transport mechanism installed in a conventional paper jam removal device, and FIG. 2 is a schematic perspective view showing the configuration of a recording paper transport mechanism installed in a paper jam removal device according to the present invention. FIG. 3 is a schematic perspective view showing the structure, and FIG. 3 is a professional diagram showing the structure of the control section of the paper jam removal device of the present invention. 1.2.10.11.12, 1.3.21.22...
roller, 3... endless bell), 4.5... paper feed tray, 6, 7... trigger roller, 8, 9... ski-like pressing mechanism, 14.15-... rail, 16 ... Support stand, 20 ... Recording paper detection sensor, 23 ... Paper jam detection circuit, 24 ... Control circuit, 25 ... Counter, 2
6...8-Dnip roller drive circuit, 21o...Motor, Pl. P... Recording paper, G1 + G snow m QB...
Conveyance guide, R1, R snow...conveyance roller.

Claims (1)

[Claims] In a recording paper transport system which is formed by connecting at least two sets of front and rear sub transport systems that transport the recording paper with a constant gripping pressure, only the rear sub transport system is arranged so as to be able to be led out to the outside of the main body of the device. In the jammed paper removal device in the recording paper transport system, the apparatus includes a recording paper detection sensor disposed at a connecting position of the both-side transport systems, and a recording paper detection sensor disposed at a position spanning the both-side transport systems according to the detection output of the sensor. A means for detecting a paper jam p of the recording paper is disposed in front or behind a connecting position of the both-side conveyance system, and the paper jam p is detected by the paper jam detection means. A hard nip row 2 having a greater gripping pressure than the front sub-transport system for forcibly transporting the jammed recording paper until its passage is detected by the sensor. Paper jam removal device.