JPH05238597A - Recorder - Google Patents

Abstract

PURPOSE:To facilitate jam processing of a recording medium by driving a conveying rotary unit rotated by a predetermined amount in a reverse direction to a conveying direction, and reducing an amount of the recording medium advanced to except a conveying path. CONSTITUTION:In the case that a recording sheet 13 is advanced into between a sheet guide 17 and a platen roller 14 to detect this recording sheet by a jam sensor 23 through a sensor window 17a, rotation in a conveying direction of the platen roller 14 is stopped to perform an inspection display of the recording sheet. In a condition that a cover sensor is turned off by opening a recording cover of a device main unit by a user, when a start button is pressed, the platen roller 14 is reversely rotated to the conveying direction, and the recording sheet 13, coming past the sensor window 17a, is reversely conveyed till the jam sensor 23 is turned off. In this way, an intruding amount of the recording medium advanced into except a conveying route is reduced, and since particularly the recording medium is prevented from winding round a rotary unit, a jam process can be safely performed easily further without damaging a device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device such as a facsimile machine or a printer, and more particularly to a recording device which facilitates jam (paper jam) processing of a recording medium.

[0002]

2. Description of the Related Art Conventionally, in a recording apparatus such as a facsimile machine, a recording sheet as a recording medium is conveyed by a platen roller, and an image is formed according to image information by a recording head which presses the platen roller. Is configured.

In the above apparatus, a jam detection sensor for detecting a jam is provided in the recording sheet conveyance path. When the jam detection sensor detects the presence of the recording sheet, the platen roller is stopped, To inspect the recording sheet, the user opens the recording cover that constitutes the lid of the main body of the apparatus that contains the recording sheet, grasps the recording sheet that has entered between the platen roller and the guide member, and pulls it out to clear the jam. I was going.

[0004]

However, in the above prior art, when the jam detection sensor detects the presence of the recording sheet and stops the rotation of the platen roller, the recording sheet enters the outside of the conveying path. Part of the recording sheet may wind around the platen roller. In this case, there is a problem in that it is difficult for the user to remove the recording sheet when the jam is removed, and the user cannot perform the process and must call a service person.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a recording apparatus in which jamming of the recording medium is facilitated by reducing the amount of the recording medium entering the outside of the conveyance path. is there.

[0006]

Means for solving the above-mentioned problems of the prior art and applied to the embodiments described below are recording means for recording on a recording medium according to image information, and conveying the recording medium. And a recording medium detection means for detecting that the recording medium is conveyed to a place other than the conveying path, a cover member that is openably and closably mounted on the main body of the apparatus, and opening and closing of the cover member. A cover member opening / closing detecting unit for detecting a state, the cover member opening / closing detecting unit detects the opened state of the cover member, and is provided in the apparatus main body only when the recording medium detecting unit detects the recording medium. It is characterized in that the transport rotating body is rotationally driven in a direction opposite to the transport direction by a predetermined amount by operating a switch.

Further, recording means for recording on a recording medium according to image information, a conveying rotating body for conveying the recording medium, a cover member mounted on the apparatus main body so as to be openable and closable, and the cover member And a cover member opening / closing detecting means for detecting an open / closed state, wherein the rotation direction of the transport rotary member is switched when the cover member opening / closing detecting means detects that the cover member is changed from the closed state to the open state. Characterize.

Further, recording means for recording on the recording medium according to the image information, a conveying rotating body for conveying the recording medium, and recording for detecting that the recording medium has been conveyed to other than the conveying path. And a medium detecting unit for stopping the driving of the conveying rotating body immediately after the recording medium detecting unit detects the recording medium, and rotating the conveying rotating unit by a predetermined amount in a direction opposite to the conveying direction.

[0009]

According to the above construction, when the cover member open / close detecting means detects the opened state of the cover member and the recording medium detecting means detects the recording medium, the conveying rotary member is operated by a switch provided on the main body of the apparatus. By rotationally driving the recording medium in a direction opposite to the conveying direction by a predetermined amount, it is possible to reduce the intrusion amount of the recording medium that has entered the outside of the conveying path. Jam processing by the user can be facilitated.

[0010]

【Example】

[First Embodiment] Next, an embodiment of the present invention in which the above means is applied to a facsimile apparatus will be described. 1 is a sectional view showing a schematic configuration of the entire facsimile apparatus, FIG. 2 is a block diagram of a control system, FIG. 3 is an enlarged explanatory view of the vicinity of a recording unit, FIG. 4 is a flowchart showing a control operation, and FIG. 5 is a timing chart thereof. is there.

In this facsimile apparatus, as shown in FIG. 1, a recording cover 1 which also serves as a document table is attached to an apparatus main body 2 as a fulcrum 1.
It is attached so that it can be opened and closed around a. A reading device A and a recording device B are built in the device composed of the recording cover 1 and the device main body 2.

First, referring to FIG. 1, the overall structure of the facsimile apparatus will be briefly described. The reading apparatus A sets a plurality of originals on the upper surface of the recording cover 1, and the operation section unit 3
Is operated to start the reading operation. The start switch provided in the operation unit 3 also serves as a reverse conveyance operation for a recording medium, which will be described later. Among the plurality of originals set on the recording cover 1, several originals from the bottom are conveyed to the downstream side by the pressing piece 4a and the preliminary conveying roller 4b, and the ADF (automatically constituted by the separating roller 5a and the brake roller 5b is formed. A document feeding device) separates and conveys the lowermost document one by one. The separated document is conveyed to the reading unit 7 by the document feeding roller pair 6. The original document conveyed to the reading unit 7 is irradiated with light from a light source 8, reflected light is read by an optical system 9 including a mirror, a lens, a CCD, etc., and then conveyed to a downstream side by an original document discharge roller pair 10. Then, the document is discharged onto the document discharge tray 11. The read image information is transferred to its own recording device B in the copy mode and transmitted to the recording device of another machine in the facsimile mode.

The recording apparatus B is provided with a drop-type roll holder 12 at a predetermined position of the apparatus main body 2. The roll holder 12 has a heat-sensitive recording sheet 13 as a recording medium.
Is loaded with a sheet roll 13a. The recording sheet 13 pulled out from the sheet roll 13a is conveyed by the rotation of a platen roller 14 which is a conveying rotating body. A recording head 15 which is a recording unit is pressed against the platen roller 14 by a coil spring 16, and heats according to image information to record a predetermined image on the recording sheet 13. Platen roller 14 above
Is held on the recording cover 1 side, and the recording head 15 is held on the apparatus main body 1 side. Recording sheet after recording
13 is guided by a sheet guide 17 and fixed blades 18a,
Guided by a cutter 18 consisting of a moving blade 18b, this cutter
It is cut into pages by 18. Recording sheet after cutting 13
Is a recording sheet discharge tray 21 by a pair of discharge rollers 19 and 20.
Is discharged to. A recording sheet detection sensor for detecting the edge of the recording sheet 13 between the pair of discharge rollers 19 and 20.
22 are provided. The leading end of the unrecorded recording sheet 13 among the cut recording sheets 13 is returned to the vicinity of the recording position by driving the platen roller 14 in the reverse direction.

The recording cover 1 is provided in the apparatus main body 2.
A cover sensor 1b is provided for detecting the open / closed state of the. A well-known micro switch or the like is used for the cover sensor 1b, and when the recording cover 1 is closed, the actuator 1c provided on the cover sensor 1b is pushed. On the other hand, when the recording cover 1 is opened from the apparatus main body 2, the actuator 1c is in a free state, and the open / closed state of the recording cover 1 can be detected by this.

In the vicinity of the platen roller 14, there is a jam sensor 23 for detecting that the recording sheet 13 is not conveyed through the normal conveying path and is in a state of being inserted between the sheet guide 17 and the platen roller 14. It is provided.
The jam sensor 23 detects the recording sheet 13 through the sensor window 17a formed in the sheet guide 17, and for example, a reflection type sensor is used to constantly detect the surface state of the platen roller 14 through the sensor window 17a. ing.

A block diagram of the control system of the recording apparatus B will be described with reference to FIG. 24 is a CPU that controls the entire device based on the contents of the flowchart described below.
Is. Signals are input to the CPU 24 from the cover sensor 1b, the recording sheet detection sensor 22, the jam sensor 23, the start switch 25 provided in the operation unit 3, etc., and the display 26 and the platen roller drive motor are supplied.
Signals are output to 27 mag.

Next, the platen roller 14 and the sheet guide
The jam processing operation of the recording sheet 13 that has entered between the sheet and the sheet 17 will be described. 3A, 3B, and 3C are enlarged views of the vicinity of the recording unit. FIG. 3A shows a state in which the leading edge of the recording sheet 13 after recording has entered between the sheet guide 17 and the platen roller 14 without being fed to the normal conveyance path. At this time, the leading edge of the recording sheet 13 is wrapped around the peripheral surface of the platen roller 14, and the sensor window provided on the sheet guide 17 is provided.
It is being conveyed toward 17a.

Next, FIG. 3B shows a state in which the tip of the recording sheet 13 closes the sensor window 17a. At this time, the jam sensor 23 sees the recording sheet 13 through the sensor window 17a, and the state changes from that when the surface of the platen roller 14 is seen (for example, the platen roller 14 is black and the surface of the recording sheet 13 is white). In this case, since the level of the reflected light of the LED changes and the light level detected by the phototransistor changes, the state changes from the OFF state to the ON state.), The recording sheet 13 is detected, and the platen roller 14 moves in the conveying direction. Stop rotation. In this state, the user displays the inspection of the recording sheet 13.

Here, when the user opens the recording cover 1 to perform the jam processing, the platen roller 14 and the recording head 15 are separated from each other, and the cover sensor 1b detects the open state. At this time, when the jam sensor 23 detects the presence of the recording sheet 13 and the cover sensor 1b detects the open state, when a switch (here, a start switch) provided in the apparatus main body 2 is pushed, As shown in (c), the platen roller 14 rotates in the direction opposite to the conveying direction, the recording sheet 13 passes through the sensor window 17a, and the jam sensor 23 looks at the surface of the platen roller 14 again (O
The recording sheet 13 is conveyed backward until it becomes the FF state). Alternatively, as long as the switch is kept pressed, the platen roller 14 may be reversely driven to reversely convey the recording sheet 13 to an arbitrary position.

The control operation by the control system during the jam processing will be described with reference to the flowchart shown in FIG. 4 and the timing chart shown in FIG. Step S
When recording is started in No. 1, the platen roller drive motor 27 is activated to drive the platen roller 14 in the forward direction in the normal direction.

Next, in step S2, it is judged whether or not the jam sensor 23 detects the recording sheet 13 (whether it is in the ON state or not), and if not detected (OFF state), the recording conveyance operation of the recording sheet 13 is performed. Is determined to be proceeding smoothly, the process proceeds to step S3, and it is determined whether or not the record of the transition to the next page remains. If there is recording on the next page or later, the operation from step S2 is repeated, and if there is no recording on the next page or later, the recording operation is ended.

In step S2, if the jam sensor 23 detects the recording sheet 13 (ON state),
In step S4, the driving of the platen roller drive motor is stopped and the rotation of the platen roller 14 is stopped. Then, in step S5, the display 26 is caused to display so that the recording sheet can be inspected.

Next, in step S6, the open / closed state of the recording cover 1 is determined by the cover sensor 1b. When the recording cover 1 is opened (the cover sensor 1b is OF
In the F state), it is determined in step S7 whether the start switch 25 is pressed. If the start switch 25 is pressed, the process proceeds to step S8 and the platen roller drive motor 27 is started. To rotate the platen roller 14 in the direction opposite to the conveying direction.

Next, in step S9, it is determined whether the jam sensor 23 is detecting the recording sheet 13 (whether it remains in the ON state), the recording sheet 13 passes through the sensor window 17a, and the jam sensor 23 When the recording sheet 13 cannot be detected (the jam sensor 23 is turned off), the process proceeds to step S10 and the platen roller drive motor is moved.
The driving of 27 is stopped and the rotation of the platen roller 14 is stopped (see the timing chart of FIG. 5A).

When the recording cover 1 is opened (the cover sensor 1b is in the OFF state) in step S6, the process proceeds to step S7 ', the start switch 25 is pressed, and the process proceeds to step S8' to move the platen roller drive motor 27. It is also possible to start up and rotate the platen roller 14 by a certain amount in the direction opposite to the conveying direction and stop it (see the timing chart in FIG. 5B). Further, the reverse rotation of the platen roller 14 is limited to when the jam sensor 23 detects the recording sheet 13 (when it is in the ON state), and when the jam sensor 23 is in the OFF state, the start switch 25 is pressed. Also, by configuring the platen roller 14 not to rotate, it is possible to prevent the platen roller 14 from rotating more than necessary and improve safety.

According to the above construction, when the user removes the recording sheet 13 that has entered between the platen roller 14 and the sheet guide 17, it is preferable that the recording sheet 13 can be pulled up and removed. If the platen roller 14 and the sheet guide 17 are clogged and cannot be removed, the switch 25 provided on the apparatus main body 2 is pressed, or only while the switch 25 is pressed, the platen roller 14 moves in the direction opposite to the conveying direction. Rotate a predetermined amount. As a result, the amount of the recording sheet 13 that has entered between the platen roller 14 and the sheet guide 17 can be reduced, and the paper jam can be cleared, and the jam processing can be performed easily and safely without damaging the device. You can Further, the reverse rotation amount of the platen roller 14 is stopped so that the winding around the platen roller 14 can be released, so that the platen roller 14 can be prevented from being wound around again and the reliability of the apparatus can be maintained.

Other Embodiments Another embodiment of the control operation at the time of jam processing by the control system will be described with reference to FIGS.
This will be described with reference to the flowchart shown in FIG. 5 and the timing charts shown in FIGS. The respective embodiments described below have the same schematic configuration of the apparatus as the above embodiments, but differ in the timing of reverse driving of the platen roller 14 during jam processing.

In FIG. 6, steps S21 to S
Since steps up to 26 are the same as steps S1 to S6 in the above-mentioned embodiment, the description thereof will be omitted. When the recording cover 1 is opened in step S26 (the cover sensor 1b is in the OFF state), the process proceeds to step S27, the platen roller drive motor 27 is activated, and the platen roller 14 is rotated in the direction opposite to the transport direction. .. The cover sensor 1b is turned on from the ON state while the recording cover 1 is being opened.
After shifting to the FF state, the platen roller 14 moves to the recording head 15
Be farther apart.

The platen roller 14 is reversely rotated by a fixed amount within a predetermined time.
The amount is such that the normal winding around the platen roller 14 of 13 can be released. In addition, the reverse drive within the predetermined time is
This is to stop the rotation of the platen roller 14 so that the user can immediately touch the platen roller 14 when the recording cover 1 is completely opened. Further, driving the platen roller 14 in the reverse direction with the platen roller 14 and the recording head 15 separated from each other reduces the load due to the pressing of the recording head 15 and the platen roller 14 due to the load due to the winding or jamming of the recording sheet 13. This is to prevent the drive motor 27 from being unable to rotate due to insufficient torque.

Next, in step S28, it is determined whether the jam sensor 23 is detecting the recording sheet 13 (whether it remains in the ON state), the recording sheet 13 passes through the sensor window 17a, and the jam sensor 23 is detected. When the recording sheet 13 can no longer be detected (the jam sensor 23 is in the OFF state), the process proceeds to step S29, the driving of the platen roller drive motor 27 is stopped, and the rotation of the platen roller 14 is stopped (FIG. 5C). Please refer to the timing chart).

Another control operation in the above embodiment will be described with reference to the flow chart shown in FIG. In the present embodiment, when the jam sensor is not provided near the platen roller 14 of the apparatus main body 2, for example, the jam detection is performed at the timing when the recording sheet detection sensor 22 detects the leading edge and the trailing edge of the recording sheet 13. It is configured to.

In FIG. 7A, when recording is started, the platen roller drive motor 27 is activated in step S31 to drive the platen roller 14 forward in the transport direction.

Next, in step S32, when the recording sheet detection sensor 22 cannot detect the leading edge or the trailing edge of the recording sheet 13, it is determined that a jam has occurred in the recording sheet 13, and the fact is displayed on the display unit 26. ..

Next, in step S33, the open / closed state of the recording cover 1 is determined by the cover sensor 1b. When the recording cover 1 is opened (the cover sensor 1b is OF
F state), the process proceeds to step S34 and the platen roller
Assuming that the recording sheet 13 is wound around the platen 14, the platen roller drive motor 27 is activated to rotate the platen roller 14 by a predetermined amount in the direction opposite to the conveying direction. (Refer to the timing chart of FIG. 8A).

7 (b) and 7 (c) are the same as those shown in FIG. 7 (a).
Step S31 to Step S33 of the flowchart shown in FIG.
Up to the same, but the platen roller 14 of the recording sheet 13
The difference is that the platen roller 14 is reversely rotated after confirming the wrapping around.

That is, as shown in FIG. 7B, after the recording cover 1 is opened in step S33, the user operates the platen roller.
After confirming the recording sheet 13 wound around the sheet 14, the process proceeds to step S35, waits for the start switch 25 to be pressed, and then proceeds to step S36 to rotate the platen roller 14b in the direction opposite to the conveying direction. is there. In this case, the platen roller 14b is configured to be driven in the reverse direction only while the start switch 25 is continuously pressed (see the timing chart of FIG. 8B).

In FIG. 7 (c), after the recording cover 1 is opened in step S33, the user operates the platen roller 14
After confirming the recording sheet 13 wound around the sheet, the process proceeds to step S37, the start switch 25 is pressed, and then the process proceeds to step S38 to rotate the platen roller 14b by a certain amount in the direction opposite to the conveying direction. (Fig. 8
(See the timing chart of (c)).

Still another control operation in the above embodiment will be described with reference to the flow chart shown in FIG. 9 and the timing chart shown in FIG. In FIG. 9, steps S41 to S43 are the same as steps S1 to S3 in the above-described embodiment, and therefore description thereof will be omitted.

If the jam sensor 23 detects the recording sheet 13 (ON state) in step S44, the process proceeds to step S44 to stop the driving of the platen roller drive motor 27 and stop the rotation of the platen roller 14. Next, in step S45, the platen roller drive motor 27 is activated again to rotate the platen roller 14 in the direction opposite to the transport direction.

Next, in step S46, it is determined whether the jam sensor 23 detects the recording sheet 13 (whether it remains in the ON state), and the recording sheet 13 detects the sensor window 17a.
When the jam sensor 23 cannot detect the recording sheet 13 after passing through (the jam sensor 23 is in the OFF state),
In step S47, the driving of the platen roller drive motor 27 is stopped, the rotation of the platen roller 14 is stopped,
In step S48, the inspection display of the recording sheet 13 is displayed on the display 26. The amount of rotation of the platen roller 14 in the opposite direction may be configured to rotate by a certain amount as shown in steps S49 to S51, not before the state of the jam sensor 23 changes. (See the timing chart in FIG. 10).

In the above-mentioned embodiment, the thermal recording system is exemplified as the recording unit, but the recording unit is not limited to this and other recording systems such as a thermal transfer recording system using an ink sheet may be used. ..

[0042]

As described above, according to the present invention, when the cover member opening / closing detecting means detects the open state of the cover member and the recording medium detecting means detects the recording medium, the switch provided in the main body of the apparatus. By rotating the transport rotary member by a predetermined amount in the direction opposite to the transport direction by an operation or the like, the amount of intrusion of the recording medium that has entered the transport path can be reduced, so that the recording medium particularly wrapped around the transport rotary member can be reduced. Since the wraparound is eliminated, the jam can be easily removed by the user and safely without damaging the device. Further, the reverse rotation amount of the transport rotating body is stopped to such an extent that the winding of the recording medium around the transport rotating body can be released, so that the transport medium can be prevented from being wound again and the reliability can be maintained. Further, when the cover member is opened from the main body of the apparatus, the conveyance rotating body is rotated in the reverse direction, whereby the load on the drive source can be reduced and the jam processing can be performed. Further, when the reverse rotation operation of the transport rotary body is performed by the switch operation, the switch can be used also as the switch on the operation portion, so that the configuration can be simplified and the cost can be designed.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view showing a schematic configuration of a facsimile device.

FIG. 2 is a block diagram of a control system.

FIG. 3 is an enlarged explanatory diagram of the vicinity of a recording unit.

FIG. 4 is a flowchart showing a control operation during jam processing.

FIG. 5 is a timing chart of a control operation during jam processing.

FIG. 6 is a flowchart showing another example of the control operation at the time of jam processing.

FIG. 7 is a flowchart showing another example of the control operation during jam processing.

FIG. 8 is a timing chart showing another example of the control operation during jam processing.

FIG. 9 is a flowchart showing another example of the control operation during jam processing.

FIG. 10 is a timing chart showing another example of the control operation at the time of jam processing.

[Explanation of symbols]

 A ... Reading device B ... Recording device 1 ... Recording cover 1a ... Support point 1b ... Cover sensor 1c ... Actuator 2 ... Device body 3 ... Operation unit unit 4a ... Pressing piece 4b ... Preliminary conveying roller 5a ... Separation roller 5b ... Brake roller 6 ... Original feeding roller pair 7 ... Reading section 8 ... Light source 9 ... Optical system 10 ... Original ejection roller pair 11 ... Original ejection tray 12 ... Roll holder 13 ... Recording sheet 13a ... Sheet roll 14 ... Platen roller 15 ... Recording head 16 ... Coil Spring 17 ... Sheet guide 17a ... Sensor window 18 ... Cutter 18a ... Fixed blade 18b ... Moveable blades 19,20 ... Discharge roller pair 21 ... Recording sheet discharge tray 22 ... Recording sheet detection sensor 23 ... Jam sensor 24 ... CPU 25 ... Start switch 26 ... Display 27 ... Platen roller drive motor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H04N 1/00 108 M 7046-5C J 7046-5C

Claims (7)

[Claims] 1. A recording means for recording on a recording medium according to image information, a conveying rotating body for conveying the recording medium, and a means for detecting that the recording medium is conveyed to a place other than a conveying path. The recording medium detection unit includes a recording medium detection unit, a cover member that is openably and closably mounted on the apparatus main body, and a cover member opening / closing detection unit that detects an open / closed state of the cover member, and the cover member opening / closing detection unit is a cover member. The open state is detected, and only when the recording medium detecting means detects the recording medium, the conveying rotary member is rotationally driven by a predetermined amount in a direction opposite to the conveying direction by operating a switch provided on the apparatus main body. Recording device. 2. The switch provided on the apparatus main body,
The recording apparatus according to claim 1, wherein a switch provided on the operation panel also serves as the switch. 3. A recording means for recording on a recording medium according to image information, a conveyance rotating body for conveying the recording medium, a cover member mounted on the main body of the apparatus so as to be openable and closable, and the cover member. And a cover member open / close detecting means for detecting the open / closed state of the conveying rotary body, and the rotation direction of the transport rotary member is switched when the cover member open / close detecting means detects that the cover member has changed from the closed state to the open state. A recording device characterized by. 4. The recording method according to claim 3, wherein the rotation direction of the transport rotary member is switched by a switch operation provided on the main body of the apparatus when the cover member opening / closing detecting means is in the open state. apparatus. 5. The switch provided on the main body of the apparatus,
The recording apparatus according to claim 4, wherein a switch provided on the operation panel also serves as the switch. 6. A recording means for recording on a recording medium according to image information, a conveying rotating body for conveying the recording medium, and a means for detecting that the recording medium is conveyed to a place other than a conveying path. A recording apparatus, comprising: a recording medium detecting unit, wherein driving of the transport rotating body is stopped immediately after the recording medium detecting unit detects the recording medium, and the transport rotating body is rotationally driven by a predetermined amount in a direction opposite to the transport direction. 7. The recording apparatus according to claim 6, wherein the conveyance rotating body is rotated in the reverse direction only while the recording medium detecting unit is detecting the recording medium.