JPH0480158A - Printer - Google Patents

Abstract

PURPOSE:To minimize an extent of jamming of sheet in a transfer passage by outputting a stop signal to a motor when a continuous time of a roller stoppage detected by a rotation condition detecting means during action of the motor is counted for a predetermined time by a timer. CONSTITUTION:When it is determined that there is a change in an output signal from a sensor part 19 after a timer T1 is set, it is determined if counting a time by the timer T1 is completed or not, and when it is determined that counting the time is completed, a sheet magnet 11 and a motor 1 are put off, and a process is completed. When a sheet jam occurs to stop motion of a receipt sheet close to a sheet discharge port 16, rotation of a receipt roller 17 stops, and rotation of a slit gear 18 installed at a rotary shaft 17a is stopped. The output signal from the sensor part therefore stops changing. When this condition is continued for a feed time for one line, a printer controller determines that a paper jam has occurred, and an error process is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printer used in electronic equipment such as an electronic cash register.

2. Description of the Related Art An example of a conventional printer will be described with reference to FIGS. 3 and 4. This printer includes a motor 1 having a gear 2 with a slit attached to a rotating shaft 1a, and a gear 2 with a slit.
A sensor section 3 in which a light emitting section 3a and a light receiving section 3b are disposed with a slit section 2a in between, a printer controller 5 connected to the sensor section 3 via a signal line 4, and a driving gear at the end. 6 is attached, and a rotating shaft 7 is positioned and disposed so that the driving gear 6 and the slit gear 2 mesh with each other, and a journal feed is provided on the rotating shaft 7 on the side of the driving gear 6. clutch 8a
A journal feed roller 8 attached via the journal feed roller 8, a convex portion 8c disposed on the outer peripheral surface of the stepped portion 8b of the journal feed roller 8, and a contact portion 9a that rotates toward and away from the convex portion 8c. Journal magnet 9 with
, a receipt feed roller 10 attached to the rotating shaft 7 on the side of the journal feed roller 8 via a receipt feed clutch 10a, and a receipt feed roller 10 disposed on the outer circumferential surface of the stepped portion Job of the receipt feed roller 10. Receipt magnet 11 includes a convex portion 10c and a contact portion 11a that rotates toward and away from the convex portion 10c.
It was formed by However, the printer controller 5 controls the operation of each part forming the above-described printer.

In such a printer, when the motor 1 is driven, the rotating shaft 7 rotates via the slit gear 2 and the driving gear 6. Further, the journal magnet 9 and the receipt magnet]1 are driven to contact the contact portions 9a, lla.
are the convex portions 8c, respectively.

10c, the journal feed roller 8 and the receipt feed roller 10 rotate together with the rotating shaft 7. As a result, the receipt paper and the journal paper are each conveyed.

At the same time, the printer controller 5
Check the detection signal from the light receiving section 3b. When the paper is being conveyed as described above, the slit gear 2
is rotating, a constant pulse signal is detected from the light receiving section 3b of the sensor section 3.

If a paper jam occurs while paper is being transported,
The load on the motor 1 increases and its rotation is forcibly stopped, and at the same time the slit gear 2 stops, so the pulse signal is no longer detected from the light receiving section 3b of the sensor section 3, and as a result, the printer controller 5 detects that motor l is stopped. Furthermore, the printer controller 5 detects a motor lock because the motor 1 is stopped even though it is outputting a motor-on signal, and after outputting a motor-off signal, displays an error on a display or the like. to notify you of a paper jam.

Problems to be Solved by the Invention In the case of such a printer, the motor 1 is in a driving state until the motor 1 is forcibly stopped due to the load caused by the paper jam, so the motor 1 is stopped. Sometimes a considerable amount of paper is already jammed. As a result, a considerable amount of paper is wasted, and at the same time, its removal becomes extremely difficult.

Means for Solving the Problems In a printer equipped with a paper transport means connected to a motor and transporting paper to a paper ejection port, a pair of rotatable rollers for sandwiching the paper is provided near the paper ejection port, and the rollers are rotatable. A rotation state detection means for detecting the rotation state of the roller is provided,
A timer is provided to measure the duration of the stop state of the roller detected by the rotation state detection means during operation of the motor, and a stop signal output is provided to output a stop signal to the motor when a predetermined time is measured by the timer. We have provided means.

A timer measures the duration of the stopped state of the roller detected by the rotation state detection means during operation of the action motor, that is, the time during which paper conveyance is stopped in the vicinity of the paper ejection port, and this timer measures the duration of the stopped state of the roller detected by the rotation state detection means. When the time is counted, the stop signal output means outputs a stop signal to the motor to stop the motor.

Therefore, it is possible to quickly detect the occurrence of a paper jam and stop the conveyance of the paper.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. As shown in FIG. 1, this printer is the same as the printer shown in FIG. 3, with a pair of journal rollers 13 provided near the journal discharge port 12, and a rotating shaft 13a of one of these journal rollers 13 having a slit. gear 1
4, and the slit portion 14a of the slit gear 14
A sensor section 15 similar to the sensor section 3 is provided between the two, and a pair of receipt rollers 1 is provided near the receipt discharge port 16.
7, a slit gear 18 is provided on one rotation shaft 17a of these receipt rollers 17, a sensor portion 19 similar to the sensor portion 15 is provided between the slit portion 18a of the slit gear 18, and further, The two sensor sections 15 and 19 are connected to the printer controller 5 via signal lines 20 and 21, respectively.

Therefore, the same reference numerals are used for the same parts as those described in the example of the conventional printer, and the description thereof will be omitted.

However, the paper conveying means is formed by a journal feed roller 8 and a receipt feed roller 10. Further, the rotation state detection means is formed by the slit portion 14a of the slit gear 14 and the sensor portion 15, and the slit portion 18a of the slit gear 18 and the sensor portion 19. Furthermore, a timer and
The stop signal output means is provided in the printer controller 5.

The journal roller 13 is rotated by the journal paper conveyed to the journal discharge port 12 by the journal feed roller 8, and the receipt roller 17 is rotated by the journal paper conveyed to the receipt discharge port 16 by the receipt feed roller 10. It rotates using receipt paper.

In such a configuration, when conveying receipt paper, the printer controller 5 turns on the motor 1, sets a timer T1 that measures the feeding time for n lines, and uses the receipt magnet as shown in FIG. Turn on 11. At this time, the contact portion 11a of the receipt magnet 11 separates from the convex portion 10c, and as a result, the receipt feed roller 10 rotates together with the rotating shaft 7, thereby starting to convey the receipt paper.

Furthermore, after setting a timer T that measures the feed time for the negative digit, detecting the output signal from the sensor section 19,
It is determined whether there is a change in the output signal.

If it is determined that there is no change in the output signal from the sensor section 19, it is determined whether or not the time measurement by the timer io has ended, and if it is determined that the time measurement has not ended, the above-mentioned sensor section The process after detecting the output signal from 19 is repeated, and when it is determined that the time measurement has ended, the receipt magnet 11 and motor 1 are turned off, and then error processing is performed.

Further, if it is determined that there is a change in the output signal from the sensor section 19, it is determined whether or not the time measurement by the timer T1 has ended, and if it is determined that the time measurement has not ended, the above-mentioned Repeat the process after setting timer T2,
If it is determined that the time measurement has ended, the receipt magnet 11 and the motor 1 are turned off, and then the process ends.

That is, when a paper jam occurs and the receipt paper near the receipt discharge port 16 stops moving, the rotation of the receipt roller 17 is stopped, and the rotation of the slit gear 18 attached to its rotating shaft 17a is also stopped. . Therefore, the output signal from the sensor section 19 does not change. When this state continues for a single digit feed time (predetermined time), the printer controller determines that a paper jam has occurred and performs error processing.

Note that the processing performed by the printer controller 5 when transporting the journal paper is also exactly the same as described above.

In this way, after the conveyance of journal paper and receipt paper in the vicinity of the journal discharge port 12 or receipt discharge port 16 is stopped, the ReimaT! Since the motor 1 is stopped when a predetermined time has elapsed, the occurrence of a paper jam can be detected early and the conveyance of journal paper or receipt paper can be stopped.

As a result, it is possible to minimize the amount of jamming of journal paper or receipt paper in each part on the conveyance path, and as a result, it becomes easy to remove the jammed journal paper or receipt paper.

Effects of the Invention As described above, the present invention provides a printer equipped with a paper transport means connected to a motor and transporting paper to a paper ejection port, in which a pair of rotatable rollers that sandwich the paper near the paper ejection port are provided. (20) a rotational state detection means for detecting the rotational state of the roller; a timer for measuring the duration of the stopped state of the roller detected by the rotational state detection means during operation of the motor; Since a stop signal output means is provided that outputs a stop signal to the motor when a predetermined time is counted by the timer, the duration of the stopped state of the roller detected by the rotation state detecting means while the motor is operating, that is, the paper discharge A timer measures the time during which paper conveyance is stopped in the vicinity of the exit, and when the timer measures a predetermined time, the stop signal output means outputs a stop signal to the motor to stop the motor. Therefore, it is possible to quickly detect the occurrence of a paper jam and stop the conveyance of the paper. This makes it possible to minimize paper jams in various parts of the transport path.
As a result, the work of removing jammed paper becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a flowchart showing paper conveyance processing by a printer controller, FIG. 3 is a front view showing an example of a conventional printer, and FIG. 4 is a journal feed roller. FIG. 2 is a partially enlarged cross-sectional view showing the surrounding area. DESCRIPTION OF SYMBOLS 1... Motor, 8, 10... Paper conveyance means, 12° 16... Paper discharge port, 13.17... Roller, 14
a. 15.18a, 19...Amount of rotational state detection means Applicant: Tokyo Electric Co., Ltd.: Nito Noboru 1 J 13 (Fu 1 "Minita 5) 1 to 1 (Saiyu")

Claims (1)

[Claims] In a printer equipped with a paper transport means connected to a motor to transport paper to a paper discharge port, a pair of rotatable rollers that sandwich the paper is provided near the paper discharge port, and the rotational state of the rollers is detected. A rotation state detection means is provided,
A timer is provided to measure the duration of the stop state of the roller detected by the rotation state detection means during operation of the motor, and a stop signal output is provided to output a stop signal to the motor when a predetermined time is measured by the timer. A printer characterized in that a means is provided.