JPS60204548A - Paper jam removing device - Google Patents

Abstract

PURPOSE:To reliably accomplish paper jam removal by energizing a solenoid to release the holding related to transportation of recording paper at the time of removing recording paper jammed between the front and rear sub-transport systems in a paper jam removing device. CONSTITUTION:A paper jam removing device comprises a recording paper detecting sensor 20 disposed at a coupling point of the first and second sub-transport systems, means for detecting jamming of recording paper at a position extending between the first and second sub-transport systems according to a detection output of the sensor 20, and a separation mechanism for separating from an endless belt 3 skis-like pressing mechanisms 10, 11, 12 provided with magnetic bodies 21a, 21b, 21c and electromagnets 22a, 22b, 22c brought close thereto. In this arrangement, the skis-like pressing mechanisms 10-12 are separated from the belt 3 by energizing the electromagnets 22a-22c of the separating mechanism on detecting a paper jam to release the holding of the jammed recording paper in the first sub-transport system, and in such a condition, the second sub- transport system is drawn outside the machine in direction of an arrow A to remove the jammed paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of application in children's business] The present invention relates to a paper jam removal device for recording paper in a recording paper transport system which is constructed by connecting at least two sets of sub-transport systems. In particular, the present invention relates to an improvement for completely and easily removing jammed recording sheets at the connecting position of the sub-transport system.

[Prior art]

Conventionally, various configurations have been known and implemented as recording paper transport mechanisms in copying machines, facsimile machines, etc., and FIG. 1 shows an example of such a configuration. FIG. 2 is a perspective view of a recording paper conveyance system of IJII constructed as shown in FIG. That is, in FIG. 1, the two sets of rollers 1 and 2 described above 4) have rotating shafts parallel to the rollers of the main building 1 and are arranged at a predetermined distance apart. An endless belt 3 wound between
and recording paper P selectively fed out by trigger rollers 7.8.9 from separate paper feed trays 4, 5.6, respectively.
It consists of a ski-like pressing mechanism (hereinafter simply referred to as ski mechanism) 10, 11, and 12 consisting of a flat plate that presses I HF2 +P* onto the endless belt 3. A second subsystem connected to the first subsystem includes a pair of rollers 1a, 14, and 15 rotatably pressed against each other.
．． 16, and plate-shaped conveyance guides G, IG, , G that connect these conveyance rollers R1a R* and the first subsystem and the recording section.
, and. In such a configuration, each part constituting the first subsystem is fixedly arranged with respect to the main body of the device, so that the first subsystem cannot be led out of the device. On the other hand, each part constituting the second subsystem is placed on a support stand 19 that is slidably disposed with respect to the device main body via rails 17 and 18. A so-called user function is provided so that the second subsystem can be taken out of the machine by sliding it in the direction of arrow A.

According to the recording paper transport mechanism having such a configuration, when any selected recording paper, for example, recording paper P1, is fed out from the paper feed tray 4 in accordance with the rotation of the trigger roller 7, the ski mechanism 10 moves the recording paper c or more. For recording paper p, p, trigger rollers 8, 9, paper feed trays 5, 6,
The ski mechanism 11.12) is pressed against the endless belt 3 and follows the movement of the endless belt 3, which has already been rotated by the rollers 1 and 2 at this time, to
is carried within the subsystems of Hind limb record sheet P1
is a conveyance guide G connected to the first subsystem.
, into the second subsystem through the transport rollers R3 and R8, and the transport guides G, , G
, are sequentially conveyed and supplied to the recording section at the rear. Now, if we monitor the location where the paper jam occurs in the conventional recording paper conveyance mechanism, it is found that due to its structure, the first subsystem and the first subsystem are This occurs most often at a position spanning the second subsystem, that is, between the endless belt 3 and the conveyance guide G1, and in such a case, the previous conveyance control is stopped, so the paper jamming system If the recording paper on which the blemish occurs is not promptly removed from the affected area, the next recording will not be possible. Conventionally, when a paper jam as described above occurs, the second subsystem is connected to the rail 17.
The supporting stand 19 and a part of the recording paper are pulled out of the machine via the support 18, and in this state, the recording paper that is insufficiently jammed is removed. That is, the day mechanism in the second subsystem described above was incorporated into the main body of the device as a jammed paper removal device. However, according to the conventional paper jam removing device, the recording paper is separated from the first subsystem and the second subsystem due to force.
When a paper jam occurs across the subsystems of the first subsystem, and the rear end thereof is the ski mechanism 10, 11.12 and the endless pel kQ in the first subsystem, respectively.
If the recording paper is held between the two subsystems, the recording paper may be torn when the second subsystem is pulled out of the machine, and a portion of the paper may end up inside the first subsystem. Many remained. Therefore, in order to remove this piece of paper, it is necessary to further search inside the first subsystem after pulling out the second subsystem and remove the piece of paper, which makes the work complicated and difficult. Another disadvantage is that if these pieces of paper cannot be completely removed, they may cause paper jams to occur again at that location during the next recording operation.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances.When removing a jammed recording paper at a position spanning between a first subsystem and a second subsystem, damage to the recording paper and accompanying It is an object of the present invention to provide a paper jam removal device that can avoid the work of removing residual paper pieces within the subsystem and can achieve 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 the detection output of the sensor is used to detect the recording paper at a location spanning between the first and second subsystems. means for detecting paper jam;
A detachment mechanism for the ski mechanism from the endless belt is provided, which is constructed by installing an electromagnet in close proximity to a magnetic body attached to each ski mechanism, and the detachment mechanism is configured to release the ski mechanism from the endless belt when the paper jam detecting means detects a paper jam. By energizing the electromagnet, the ski mechanism is detached from the endless belt to release the jammed recording paper in the first subsystem, and in this state, the second subsystem is activated. The above object is achieved by leading the paper out to the outside and removing the jammed recording paper.

〔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 the configuration of a recording paper transport mechanism equipped with a paper jam removal device according to the present invention. They are marked with similar symbols.

According to the conveyance mechanism shown in FIG. 2, a recording paper detection sensor (hereinafter simply referred to as paper detection sensor) 20, which is made of, for example, a reflective photosensor, is provided at the connection position of the first and second subsystems described above. ing. Furthermore, as a new configuration in the first saturation system, recording paper P1# selectively discharged from each paper feed tray 4, 5.
Soft iron magnetic material 21a, 21b attached to the back side of the suppression surface of each ski mechanism 10, 11, 12 which is pressed against the endless belt 3 to convey pHP.

21a and each magnetic body 21 '' e 2 l b +
The ski mechanism 10° 1 to the endless belt 3 consists of electromagnets 22m, 22b, 22a located close to 21a.
1.12 release mechanisms are provided.

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

First, the first selected recording paper P, for example, is ejected from the paper feed tray 4 by the trigger roller 7, and then held by the ski mechanism IO between the endless belt 3 and the endless belt 3. The paper is conveyed following the rotation of the sheet, and is similarly conveyed within the first subsystem while being pressed by the ski mechanism 11, 12, passes over the paper detection sensor 20, and is supplied to the second subsystem. Ru. At this time, the paper detection sensor 20 obtains a specific paper detection output by receiving reflected light according to the passage of the recording paper P. Here, if the recording paper P1 is being conveyed normally, the recording paper P passes over the paper detection sensor 20 after a certain period of time has elapsed, so that the paper detection output of the paper detection sensor 20 also increases. It disappears accordingly.

However, if paper #i occurs at the relevant location, the conveyance of the recording paper P1 will stop, and the paper detection output of the paper detection sensor 20 will not be obtained even after the above-mentioned time has elapsed. . Therefore, in the paper jam detection circuit 23 to which the detection output of the paper detection sensor 20 is input, when the paper detection output is input for the above-mentioned certain period or more, this is detected as a paper jam occurrence, and the paper jam detection circuit 23 detects the paper jam occurrence. The output is input to a control circuit 24 and a ski release control circuit 25 for the entire device. At this time, the control circuit 24 stops driving the recording paper transport mechanism and stops transporting the recording paper P1. On the other hand, the ski release control circuit 25 is connected to the electromagnets 22m, 22b, 22 in the ski release mechanism described above.
e is energized and the corresponding magnetic bodies 21a*21b, 21c are attracted to these electromagnets 22m, 22bs22a, thereby causing the ski mechanism 10, 11.12 to also detach from the endless belt 3 and enter the first subsystem. All grips on the recording paper Pl remaining as paper jam are released.

Therefore, when the operator slides the support stand 19 in the direction of arrow A through the rails 17 and 18 to lead out each of the second subsystems to the outside of the machine, the paper jam occurs. The recording paper P1 remaining in the first subsystem can be extracted without being damaged. Therefore, the subsequent removal of the jammed recording paper P1 only needs to be carried out within the second storage system, and this procedure can be performed outside the machine, making the removal of the jammed paper extremely easy. .

〔Effect of the invention〕

As explained above, according to the paper jam removal installation of the present invention, a paper jam of the recording paper at a position straddling both subsystems is detected from the detection output of the paper detection sensor, and at the same time as the paper jam is detected, the paper Ii! Since the conveyance of the ib recording paper is stopped and the grip related to the conveyance of the paper jammed paper in the subsystem that cannot be taken out of the machine is released, the subsystem that can be taken out outside the machine is pulled out and the paper jammed paper is removed. There is no fear of tearing the recording paper when removing the recording paper, and the removal process can be performed outside the machine only within the subsystem that can be derived, making it possible to handle the paper jam very reliably. It has excellent effects and is easy to perform.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing the configuration of a recording paper transport mechanism in which a conventional paper jam removal device is installed, and FIG. 2 is a recording square paper transport system in which a paper jam force removal device according to the present invention is installed. FIG. 3 is a block diagram showing the structure of the control section of the paper jam removal device of the present invention. 1 #2, 13. 14, 15, 16...Roller, 3...
・Endless bell), 4.5.6... Paper feed tray, 7°8
．． 9... Trigger roller, 10, 11. 12... Ski-shaped pressing mechanism, 17, 18... Rail, 19... Support stand, 20... Recording paper detection sensor, 21m, 21b
. 21 c---magnetic material, 22 a e 22 b -2
2a...Electromagnet, 23...Paper jam detection circuit, 24
. . . control circuit, 25 . . . ski release control circuit.

Claims (1)

[Claims] An endless belt is wound between two rollers arranged with a predetermined distance between recording sheets of each size, and a ski-like suppressing mechanism corresponding to each recording sheet is gripped along the K side, and the endless belt is rotated. a first sub-conveyance system that conveys the recording paper while following the motion; and a second sub-conveyance system that conveys the recording paper supplied from the first sub-conveyance system while gripping it with at least one pair of rollers that are rotatably pressed against each other. A paper jam removal device in the recording paper transport system, which is constructed by arranging only the second sub-transport system in a recording paper transport system formed by connecting two sub-transport systems such that it can be led out of the apparatus main body. A recording sheet detection sensor arranged at a connection position of the first and second sub-transport systems, and a recording paper detection sensor arranged at a position spanning the first and second sub-transport systems according to the detection output of the corpse sensor. A magnetic body that detects a paper jam and includes an electromagnet disposed in the ski-shaped suppression mechanism that is energized according to the paper jam detection means and the paper jam detection output of the paper jam detection means when the paper jam is detected. and detachment means for the ski-shaped suppression mechanism from the endless belt disposed adjacent to the paper jam removal device.