JPH04251062A - Recording sheet delivering device - Google Patents

Abstract

PURPOSE:To effect discrimination in a manner that a narrow recording paper is not erroneously recognized as a wide recording paper even when the narrow recording paper is not accurately set by locating one sensor in a position outside the two edges of a narrow recording paper, in which two sensors are set, and in a position inside the two edges of a wide recording paper. CONSTITUTION:When a narrow recording paper 1a is accurately set by using a partition plate 3, only a second sensor 5 is operated, and first and third sensors 4 and 7 are not operated. When a wide recording paper is set, the first, second, and third sensors 4, 5, and 7 are all operated. When the narrow recording paper 1a is set without using the partition plate 3 in a state to be placed near the left, the first and second sensors 4 and 5 are operated and the third sensor 7 is not operated. Similarly, when the narrow recording paper is set in a state to be placed near the right, the second and third sensors 5 and 7 are operated but the first sensor 4 is not operated. As noted above, different combination is selected according to a kind and the set state of the recording paper 1a, and a deciding circuit 8 outputs the presence and the set state of the recording paper 1a based on the combination.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the presence or absence of recording paper and the set state of a facsimile machine or the like.

[Prior Art] Fig. 6 is a diagram showing how a conventional facsimile machine detects the presence or absence of narrow recording paper. Stocker box, 3 is a partition plate for suppressing the deviation of recording paper in the width direction, 4 is a first sensor that detects the presence or absence of recording paper, 5 is a second sensor that detects the presence or absence of recording paper, 6 is a second sensor This is a mounting plate for mounting the first sensor 4 and the second sensor 5, and is located on the recording paper feeding side. FIG. 7 is a diagram showing how to detect the presence or absence of wide recording paper in a conventional facsimile machine. In the figure, 1b is the wide recording paper.

Next, the operation will be explained. Consider a case where reflective photoelectric switches are used for the first sensor 4 and the second sensor 5.

In the case of the narrow recording paper 1a, as shown in FIG. 6, the first sensor 4 is placed outside the narrow recording paper 1a and does not operate, and only the second sensor 5 operates. It can be recognized that there is a narrow recording paper 1a, and in the case of a wide recording paper 1b, the first sensor 4 and the second
Since the sensors 5 operate together, it is possible to recognize that there is a wide recording paper 1b. Needless to say, if there is no recording paper, both sensors will not operate, so it is possible to detect paper out.

[Problems to be Solved by the Invention] Since the conventional recording paper feeding device is configured as described above, when using the narrow recording paper 1a, the partition plate 3 is used to control only the second sensor 5. It needs to work. However, it is easy to forget to attach the partition plate 3, and if you inadvertently forget to attach the partition plate 3 as shown in FIG. Nevertheless, there is a problem in that when the first sensor 4 and the second sensor 5 are operated together, it is erroneously recognized that there is a wide recording paper 1b.

This invention was made to solve the above-mentioned problems, and even if the narrow recording paper 1a is not set correctly, it will not be mistakenly recognized as the wide recording paper 1b, and instead the width will be changed. The purpose of this invention is to be able to determine that a narrow recording sheet 1a has not been set correctly.

[Means for Solving the Problems] The recording paper feeding device according to the present invention has the sensors 4 and 7 set at the center position, and the recording paper 1a has a narrow width of 1 m on both edges.
, 1g on both edges from the wide recording paper outside 1m,
1g, and sensors 5 are provided at both edges of the narrow recording paper 1a, and at positions inside the 1m, and the determination is made to determine the set state of each recording paper based on the output signal from each sensor. A circuit 8 is provided.

[Function] In the recording paper feeding device according to the present invention, if the mounting plate 3 is forgotten and the narrow recording paper 1a is set unevenly, the sensor 5 and any one of the sensors 4 and 7 detects the recording paper.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In FIGS. 1(a) and (b), 7 is the first sensor 4
a third sensor attached to the opposite end of the . 1st
The sensor 4 and the third sensor 7 are located at both edges 1m of the narrow recording paper 1a, and at both edges 1 of the wide recording paper 1b outside the 1m.
g and 1g, and is attached to the mounting plate 6. The second sensor 5 is attached closer to the center, that is, inside 1 m of both edges of the narrow recording paper 1a.

Reference numeral 8 in FIG. 1(b) is a determination circuit that determines the set state of the recording paper based on the signals from the sensors 4, 5, and 7.

The narrow recording paper 1a and the wide recording paper 1b are transported toward a thermal head (not shown), printed on them, and cut into a predetermined size.

Next, the operation will be explained. When the narrow recording paper 1a is set correctly using the partition plate 3 as shown in Fig. 1,
Only the second sensor 5 operates, and the first and third sensors 7 do not operate. Also, as shown in Figure 2, a wide recording paper 1b
is set, the first sensor 4, the second sensor 5
, the third sensor 7 all operate. When the narrow recording paper 1a is set on the left side without using the partition plate 3 as shown in FIG. 3, the first sensor 4 and the second sensor 5
operates, and the third sensor 7 does not operate. Similarly, when the narrow recording paper 1a is set on the right side as shown in FIG. 4, the second sensor 5 and the third sensor 7 operate, but the first sensor 4 does not operate. As described above, the combinations of the operations of the first sensor 4, the second sensor 5, and the third sensor 7 can be set differently depending on the type of recording paper and the setting situation. The determination circuit 8 is
Based on the on/off combinations of the sensors shown in FIG. 5, the presence or absence of recording paper and the set state are determined and the results are output.

Note that the first sensor 4 and the third sensor 7 are arranged at a width 214 mm slightly wider than the width (210 mm) of the narrow recording paper 1a.
By setting the distance to approximately 222 mm, even if the recording paper moves to a position beyond the range of 214 to 222 mm due to skew during operation, the first sensor 4 or third sensor 7 will operate and no abnormality will occur. It is possible to detect this and prevent recording errors from occurring.

[Effects of the Invention] As described above, according to the present invention, two sensors are set at the center position outside both edges of the narrow recording paper and inside both edges of the wide recording paper. Since one sensor is installed inside both edges of the narrow recording paper, even if the narrow recording paper is not set correctly, it can be connected to the wide recording paper. This has the effect of being able to determine that narrow recording paper has not been set correctly, without erroneous recognition.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are diagrams showing a situation when a narrow recording is set in a recording paper feeding device according to an embodiment of the present invention, and FIG. A diagram showing the state when paper is set, Figure 3,
Fig. 4 is a diagram showing what happens when the recording paper is not set correctly in the above embodiment, Fig. 5 is a table showing the combination of operations of each sensor in the above embodiment, and Fig. 6 is a diagram showing the conventional recording paper. FIG. 7 is a diagram showing the situation when narrow recording paper is set in the feeding device, FIG. 7 is a diagram showing the situation when wide recording paper is set in the conventional embodiment, and FIG. 8 is the above-described diagram. FIG. 6 is a diagram illustrating a situation when recording paper is not set correctly in a conventional example. In the figure, 1a is a narrow recording paper, 1b is a wide recording paper,
1m is both edges of the narrow recording paper, 1g is both edges of the wide recording paper, 2 is the stocker box, 3 is the partition plate, 4 is the first sensor, 5 is the second sensor, 6 is the mounting plate , 7 is a third sensor, and 8 is a determination circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Patent Attorney Junichi Miyazono

Claims (1)

[Claims] A holding section that holds two types of rolled recording paper of different widths, a partition plate that sets the recording paper at the center of the holding section, and a plurality of sensors that detect the recording paper sent out from the holding section. A recording paper feeding device comprising: two sensors located outside both edges of a narrow recording paper and inside both edges of a wide recording paper, with the sensor set at a central position; Recording characterized in that it is provided with one sensor located inside both edges of the narrow recording paper, and a determination circuit that determines the set state of each recording paper based on the output signal of each of the sensors. Paper feeding device.