JPH01167146A - Recorder - Google Patents

Abstract

PURPOSE:To transfer recording paper sheets securely by detecting the presence of the paper sheet at a specified position upstream of a recording section, and detecting and monitoring the presence of the paper sheet at a position on the downstream side and not facing a near-end marking of the paper sheet. CONSTITUTION:Presence of recording paper sheets is detected with sensors RPS1, RPS2 at a 1st position on a transfer passage of recording paper sheets RP1, RP2 on the upstream side of a recording section 14 and facing near-end markings NM on the paper sheets. The presence of the recording paper sheets RP1, RP2 is also detected with a sensor RPJS at a 2nd specified position on the downstream side of the recording section 14 and not facing the near-end markings NM of the paper sheets. The front end position of each of the recording paper sheets is sent either to the recording section 14 or to a transfer section while monitoring the outputs of respective sensors. When the recording paper sheet sensors RPS1, RPS2 detect black on either of the paper sheets, it can be judged whether the detection is the absence of the paper or the near-end marking. Even when the near-end marking NM is detected, its front end can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording apparatus that selects one of a plurality of consecutive recording sheets, conveys it to a recording section, and records it.

[Prior Art] A conventional recording device that can store multiple recording paper sheets has the ability to store each recording paper at system start-up, such as after power-on, after opening/closing the recording cover, or by pressing down the stop key during recording. The tip position is detected by a sensor and the tips are aligned.

By the way, when the sensor detects black, it is not possible to determine whether there is no paper or a near-end mark, and it is not possible to detect the leading edge of the recording paper. Therefore, first cut with a cutter, then align the leading edge of the recording paper based on the ivy position, or assume that paper is present, perform a dry cutting operation, and then cut the recording paper. Cut the one that exists.

[Problems to be Solved by the Invention] The above-mentioned conventional device is a double roll machine, and even if the recording paper sensor determines that one recording paper is black, it is difficult to determine if it is out of paper or if a near-end mark has been detected. The problem is that it is not possible to determine whether Another problem is that even if a near-end mark is detected, the leading edge of the recording paper cannot be detected.

[Means for solving the problem] The present invention provides a first
The presence or absence of each recording paper is detected at a predetermined position, and the presence or absence of each recording paper is detected at a second predetermined position downstream of the recording unit and not facing the near-end mark of each recording paper. , while monitoring the output of each of the above detection means,
The leading edge position of each of the recording sheets is conveyed to the recording section or the conveying section.

[Function] The present invention provides the first
detects the presence or absence of each recording paper at a predetermined position, and detects the presence or absence of each recording paper at a predetermined position of the second predetermined recording paper, which is downstream of the recording section and does not face the near-end mark of each recording paper. The presence or absence of each recording paper is detected at a predetermined position, and the leading edge position of each recording paper is conveyed to the recording section or transport section while monitoring the output of each of the detection means, so that the recording paper sensor detects whether one recording paper is present or not. When black is detected on the recording paper, it can be determined whether there is no paper or a near-end mark has been detected, and even when a near-end mark is detected, the leading edge of the recording paper can be detected.

[Embodiment] FIG. 1 is a diagram showing an example of the configuration of an automatic switching double roll storage facsimile machine showing an embodiment of the present invention.

In this embodiment, a roll of front recording paper RPI, a roll of rear recording paper RP2, a feed roller FRI that conveys the recording paper RP1 while being removed from the platen roller, and a feed roller FRI that transports the recording paper RP2 from the platen roller. Feed roller FR2 that is conveyed in a detached state, sensor RPS1 that detects the black band on recording paper RPI, sensor RPS2 that detects the black band on recording paper RP2, and thermal roller that prints on the selected recording paper RPI or RP2. It has a head 4, a spring 5 that generates a pressing force between the thermal head 4 and a platen roller, and a platen roller PR that conveys a selected recording sheet to a recording position.

Also, a platen motor P that drives the platen roller PR
RM, feed motors FRMI and FRM2 that drive feed rollers FRI and FR2, respectively, a main controller 10 such as a microcomputer that controls these, and motors 7.8.
a motor driver 11 that drives the motor driver 9;
motor control block 1 that generates motor phase signals sent to motor control block 1;
2, and sensor RPS1. An input port 13 for inputting information of the RPS 2, a recording paper conveying section 14 for feeding and pulling recording paper to and from a recording section composed of a thermal head and a platen roller, and a storage section 15 for storing the recording paper.
A cutter 16 for cutting the recording paper is provided.

Further, the recording paper sensor RPJS is located downstream of the recording section 14 and is connected to each recording paper sensor RP1. Each recording paper RPI is placed at a second predetermined position not facing the near end mark of RP2.
, RP2.

2 to 4 are diagrams showing typical conveyance states of the recording paper, and FIG. 2 shows a state in which the recording paper RP2 is in the preliminary conveyance position and the recording paper RPI is in the recording position. FIG. 3 shows a state in which both recording paper RPI and RP2 are at the preliminary transport position, and when recording paper RPI is rewound upstream from the recording position and when recording paper RP2 is rewound from the recording position. It is the same when rewinding upstream. FIG. 4 shows a state in which the recording paper RPI is in the preliminary transport position and the recording paper RP2 is in the recording position.

FIG. 5 shows the sensors RPS1 and RP in the above embodiment.
It is a figure showing the positional relationship of S2 and RPJS.

Next, the operation of the above embodiment will be explained.

FIG. 6 is a flowchart showing the operation in the above embodiment.

In the start-up state of the system, sensor RPS 1
If the sensor RPS2 detects white and the sensor RPS2 detects black, it is possible to record on the recording paper RPI, but the recording paper RP2 has no paper, or even if there is paper, a near-end mark has appeared. It is unclear whether the near-end mark exists on the platen roller.

First, when the recording paper is reversed (pulled back upstream), the time it takes to move by the distance @ (L5+L2+I, 4) is T2, and the time TI is sufficiently longer than this time T2.
Then, time TI and T2 are set in the timer (Sl).

Next, both the recording papers RPI and RP2 are reversed at the same time (32), and the output of the recording paper sensor RPS1 is checked until it changes from white to black (S3). At the same time, check whether or not the timer time Tl exceeds S1.
9) If it exceeds, it is determined that the recording paper RPI is jammed (S20). After this, a jam warning is issued (521) and the system is stopped (S22).

In S3, when the sensor RPS 1 detects black and detects the leading edge of the recording paper RPI, the recording paper RPI is stopped (S4), and then the output of the sensor RPJS is checked,
If the sensor RPJS detects white (35), it can be determined that the near end mark is on the platen (Sl4
), the recording paper RP2 is reversed (S15), and it is checked that the output of the sensor RPJS changes from white to black until the time T1 is over (S16). Since the sensor RPJS detecting black from white means that the leading edge of the recording paper RP2 has been detected, the recording paper RP2 is stopped (S l 1).

At this time, the recording paper RPI is in a recordable state, the leading edge of the recording paper RPI is above the sensor RPS 1, and the recording paper RP2 is in a near-end mark and cannot be recorded, but the leading edge of the recording paper RP2 is is on the platen, and sensor R
It is recognized that it is above the PJS (S 12). The state at this time is shown in FIG.

In S12, even though the recording paper 'RP2 is near-end mark and cannot be recorded, it is on the platen, so the distance #
Move the recording paper RPI forward by a distance of (L3+L1) (S 10), without cutting, and move the recording paper RPI forward by a distance of (L3+L1) (S 13), without cutting.
Align the two recording sheets. The state at this time is shown in FIG.

In S5, when the sensor RPJS detects black, the recording paper RP2 is forwarded (3B), and the sensor RPJS
While checking the output of , the forwarding is performed until time T2 exceeds (S7).

If the sensor RPJS detects white, stop the recording paper RP2 in the same way as 316 above (S,,,'l ”1)
. 'Then, process as above (Sll, Sl child,
,;St,'3).

If the RP" JS detects black (S7) and the time T2 exceeds (S8), it can be determined that the recording paper RP2 is out of paper, so the operation is stopped there. In this case, the recording paper RPI is ready for recording. It is recognized that the leading edge of the recording paper is above the sensor RPS1, and that the recording paper RP2 is in a paperless state (S9). The state at this time is shown in FIG.

In S9, since the recording paper RP2 is out of paper, the recording paper RP1 can be forwarded by the distance (L3+L1) and alignment can be performed in the same manner as above.

The state at this time is shown in FIG. 1O.

At 316, while the sensor RPJS detects white,
When the time TI has elapsed (3, 17), it is recognized that the recording paper RP2 is jammed (318), and a jam warning is issued.
S2l:1. The system is stopped (S22).

In the above embodiment, no abnormal noise is generated in the sequence, there is no need to perform a blank cutting operation, and a jam during normal recording and a jam at system start-up can be detected.

Note that when the sensors RPS 1 and RPS 2 detect black and white, respectively, in the second embodiment, the recording paper R
PI, RP2 are reversed, and sensor RPS1. The same algorithm as above is used, just by reversing RPS2.

[Effects of the Invention] According to the present invention, when the recording paper sensor detects black on one recording paper, it can be determined whether there is no paper or a near-end mark has been detected, Even when the recording paper is detected, the leading edge of the recording paper can be detected.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram showing one embodiment of the present invention. FIG. 2, FIG. 3, and FIG. 4 are diagrams showing typical conveyance states of the recording paper in the above embodiment. FIG. 5 is a diagram showing the positional relationship of the sensors RPS1, RPS2, and IRPJS in the above embodiment. FIG. 6 is a flowchart showing the operation in the above embodiment. FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are explanatory diagrams of the operation of the above embodiment. RPI, RP2... Recording paper, FRI, FR2... Feed roller, RPSI, RP
S2...sensor, PRM...platen motor, FRMI, PRM2...feed motor. Patent applicant Canon Co., Ltd. Agent Arata Yokubo −

Claims (1)

[Scope of Claims] In a recording apparatus that selects one of a plurality of consecutive recording sheets, conveys it to a recording section, and records it, a first recording sheet on each recording paper conveyance path upstream of the recording section is provided. a first recording paper detection means for detecting the presence or absence of each of the recording papers at a predetermined position; A recording paper second detection means for detecting the presence or absence of recording paper; and a control means for transporting the leading edge position of each of the recording papers to the recording section or the conveying section while monitoring the output of each of the detection means. Characteristic recording device.