JPS6311260B2 - - Google Patents

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 conveyance device configured by connecting at least two sets of conveyance devices, and particularly relates to a paper jam removal device for recording paper in a recording paper conveyance device configured by connecting at least two sets of conveyance devices. The present invention relates to an improvement for completely and easily removing jammed recording paper at a connecting position.

[Prior art]

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 schematic perspective view of a set of configured recording paper transport devices. In other words, in this Figure 1, the above-mentioned 2
The first subsystem of the set of subsystems presses mutually rotatable rollers 1 and 2 and 3 and 4 in the direction of their rotational shafts with appropriate pressing force, and transports roller R that constitutes a gripping member for the recording paper. ₁ and R ₂
and conveyance guides _G1 and _G2 , which are made up of two plate-shaped members arranged in parallel with a certain distance maintained, and regulate the passing position of the recording paper conveyed by the conveyance rollers _R1 and _R2 . It is composed of.

There is also a second subsystem connected to this first subsystem.
Like the transport rollers R ₁ , R ₂ and the transport guides G ₁ , G ₂ , the subsystem consists of rollers 5 and 6, 7 and 8 that are rotatably pressed against each other, and the transport rollers that constitute the gripping member for the recording paper. It is composed of rollers R ₃ , R ₄ and conveyance guides G ₃ , G ₄ , G ₅ that regulate the passing position of the recording paper conveyed by the conveyance rollers R ₃ , _R 4 .

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 mounted on a support stand 11 that is slidably disposed on the equipment main body via rails 9 and 10 together with a fixing member 12, and Tilt the fixed lever 13 provided on the main body to the dotted line position as necessary,
A so-called phasor function is provided so that the second subsystem can be taken out of the machine by releasing the fixing member 12 and sliding the support stand 11 in the direction of arrow A. I'm awake. In the recording paper conveyance mechanism having such a configuration, the recording paper P supplied from the paper feeding mechanism (not shown) first passes through the conveyance guide _G1 , is gripped by moderate pressure between the rollers 1 and 2 of the conveyance roller _R1 , and then is Further, conveyance rollers R 2 , R ₃ , which are conveyed according to the rotation of both rollers 1 and ₂ and function in the same manner thereafter.
The paper is sequentially transported through transport guides G ₂ , G ₃ , G ₄ , and G ₅ by R ₄ and supplied to the recording section.

Now, when observing the location where the paper jam of the recording paper P occurs in the conventional recording paper transport mechanism, it is found that due to its structure, the location straddling the first subsystem and the second subsystem, that is, the transport roller
The most common occurrence is between R ₂ and conveyance guide G ₃ .
In such a case, the previous conveyance control is stopped, and the next recording cannot be performed unless the jammed recording paper P is promptly removed from the location. Conventionally, when a paper jam as described above occurs, the second subsystem and the support stand 11 are pulled out of the machine via the rails 9 and 10, and the paper jam is recorded in this state. Had to deal with paper removal. That is, the phaser mechanism in the second subsystem described above was incorporated into the main body of the device as a paper jam removing device.

However, according to the conventional paper jam removing device, the recording paper P is separated between the first subsystem and the second subsystem.
When a paper jam occurs between the subsystems of the first subsystem, and the rear end of the paper is gripped between rollers 3 and 4 of the transport roller _R2 in the first subsystem. In this case, the recording paper P is removed when the second subsystem is pulled out of the machine.
It was not uncommon for the paper to be torn and a portion of the piece of paper remained in the first subsystem.
Therefore, in order to remove this piece of paper, it is necessary to further search inside the first subsystem and remove the piece of paper after pulling out the second subsystem, and this work is complicated and difficult. If the paper cannot be completely removed, there is a problem in that the paper jam may occur again at that location during transportation for the next recording.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and when removing a paper jam of recording paper at a position spanning between the first subsystem and the second subsystem,
It is an object of the present invention to provide a paper jam removing device that can avoid damage to the recording paper and the accompanying removal work of remaining paper pieces in the subsystem, and can completely and easily remove paper jams.

[Structure of the invention]

Therefore, in the present invention, a sensor for detecting recording paper is provided at the connection point with the first and second subsystems, and the paper is detected at a position spanning between the first and second subsystems according to the detection output of the sensor. the device body of the second subsystem to detect a paper jam, immediately stop the conveyance operation after the detection, and guide the second subsystem out of the machine in order to remove the detected paper jam; a switch that operates in response to the tilting of a fixing lever that is operated to release the fixing; and a grip release that releases the grip of the gripping member within the first subsystem that is driven in response to the operating output of the switch. The above-mentioned object is achieved by providing a means for removing the paper jam in a state in which the paper jam recording paper remaining in the first subsystem is released from gripping by the gripping means.

〔Example〕

Embodiments of the present invention will be described in detail below based on the accompanying drawings. FIG. 2 is a perspective view showing the configuration 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. It is marked. As a new configuration of the transport 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 photo sensor, is provided at the connection position between the first and second subsystems. has been done. Further, in the vicinity of the installation position of the fixed lever 13 in the main body of the equipment on which this transport mechanism is placed, there is a portion where the fixed lever 13 is fixed when the fixed lever 13 is tilted to a state where it can be released from the fixed lever 13 with respect to the fixed member 12. A switch 21 is provided that operates in response to contact pressure at the tip of the lever 13.

Also, a pair of rollers ₃ forming a conveyance roller R2, which is a recording paper gripping member near the connection position of the first subsystem with the second subsystem.
For example, among the rollers 3 and 4, one end is fixed to rotating shafts at both ends of the roller 3, and further shafts 22
L-shaped members 23, each rotatable around
24 and a solenoid 26 connected to the other end of the L-shaped member 23, there is provided a mechanism for releasing the roller 3 from the roller 4, that is, means for releasing the gripping member. Note that normally the roller 3
is pressed against the roller 4 by a pressure mechanism such as a spring 25 provided at one end of the L-shaped member 23 with an appropriate pressure that can establish a grip force sufficient to convey the recording paper P to the roller 4. ing. Furthermore, FIG. 3 is a block diagram showing the configuration of the control section of the device according to the present invention.
The control operation of the device will be described in detail with reference to FIG.

Now, as mentioned above, the recording paper P fed from the paper feeding mechanism (not shown) is held by the conveyance rollers R ₁ and R ₂ which are recording paper gripping members, and is rotated by the rotation of the conveyance rollers R ₁ and R ₂ . According to said conveyance guide G ₁ ,
G ₂ and further supplied to the second subsystem through the transport guide G ₃ . At this time, the paper detection sensor 20 disposed at the connection point between the second subsystem and the first subsystem obtains a paper detection output corresponding to the passage of the recording paper P. Here, if the recording paper P is being conveyed normally, the paper detection output from the paper detection sensor 20 will also correspond to this, so that the recording paper P will pass over the connection position after a certain period of time has elapsed. disappears. However, if a paper jam occurs at that location, the conveyance of the recording paper P is stopped, so that the paper detection output of the paper detection sensor 20 continues to be obtained even after the above-mentioned time has elapsed. Therefore, in the paper jam detection circuit 27, the paper detection sensor 2
If the paper detection output of 0 is still obtained after the above-mentioned certain period of time, this is detected as the occurrence of a paper jam, and a signal to this effect is sent to the control circuit 28 of the entire apparatus, thereby controlling the drive of the conveyance drive system. to stop the conveyance of the recording paper P.

Next, in order to remove this paper jam, the operator tilts the fixing lever 13 to the position shown by the dotted line and fixes the fixing member 12 by the fixing lever 13 in order to guide the second subsystem out of the machine. unlock. At this time, the switch 21 is actuated in response to the tilting of the fixed lever 13, and the actuation output is input to the solenoid drive circuit 29. Then, the solenoid drive circuit 29 energizes the solenoid 26 in accordance with the operating output of the switch 21, thereby causing the roller 3 of the conveying roller _R2 to separate from the roller 4. Therefore, when the latter operator slides the support stand 11 in the direction of arrow A via the rails 9 and 10 to lead out each of the second subsystems to the outside of the machine, the Since the gripping of the jammed recording paper P by the rollers 3 and 4 of the transport roller R ₂ is released, the recording paper P can be extracted from the first subsystem without being damaged. Can be done. At this time, in a state where the leading edge of the recording paper P is already gripped between rollers 5 and 6 of the conveying roller _R3 , the above-described extraction operation can be performed more easily.

Therefore, the subsequent removal of the jammed recording paper P only needs to be carried out within the second subsystem and can be carried out outside the machine, making it possible to greatly facilitate the removal of the jammed paper.

〔Effect of the invention〕

As explained above, according to the paper jam removal device of the present invention, a paper jam of recording paper at the connection position between a transport device that cannot be pulled out and a transport device that can be pulled out is detected from the detection output of the paper detection sensor, and the paper jam of the recording paper is transported. and detects from the release operation of a fixed lever when the retractable conveying device is pulled out to remove the paper jam, and at the time of the withdrawal, the gripping of the jammed recording paper by the unextractable conveying device is detected. Since the paper jam can be removed in this state, there is no risk of tearing the recording paper when the removable transport device is pulled out of the machine, and the removal process can also be performed outside the machine. This provides an excellent effect in that the paper jam can be handled very reliably and easily by only having to be done within the paper jam.

[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 shows the configuration of a recording paper transport mechanism installed in a paper jam removal device according to the present invention. The schematic perspective view and FIG. 3 are block diagrams showing the configuration of the control section of the paper jam removing device of the present invention. 1 to 8...Roller, 9,10...Rail, 1
DESCRIPTION OF SYMBOLS 1...Support stand, 12...Fixing member, 13...Fixing lever, 20...Recording paper detection sensor, 21...
Switch, 22... shaft, 23, 24... L-shaped member, 25... spring, 26... solenoid,
27...Paper jam detection circuit, 28...Control circuit, 2
9... Solenoid drive circuit, P... Recording paper,
R ₁ ~ _{R 4} ... Gripping means (transport roller), G ₁ ~ _{G 5} ...
...Transportation guide.

Claims (1)

[Claims] 1 A first and a second transport device each having a gripping member for recording paper are connected, and only the second transport device is connected to the recording paper transport device that transports the recording paper while gripping the recording paper with the gripping member. A paper jam removing device in the recording paper transport device configured to be arranged so as to be led out to the outside of the main body, a recording paper detection sensor disposed at a connecting position of the first and second transport devices; Detecting a paper jam of the recording paper at a position spanning the first and second transport devices according to a detection output of a sensor, and outputting a signal to stop driving the recording paper transport device at the time of detection. a switch that operates in response to the second conveying device being pulled out of the device main body after detecting the paper jam;
A paper jam removing device comprising: a grip release means for releasing the grip of the grip member in the first conveying device in accordance with the operating output of the switch.