JP2003095531A - Detecting method of folding amount of continuous form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting method of accurately detecting a distance from a swing fin to a continuous form stacked on a stacker table in a paper folding part of an electronically photographing device. SOLUTION: A folding method part comprises the swing fin for folding the continuous form with an oscillating operation while feeding paper, the stacker table for stacking the continuous form folded by the swing fin, and an optical distance sensor for detecting a distance to a facing matter. The detecting direction of the optical distance sensor is determined vertically from the swing fin side toward the stacked continuous form, timing of the oscillating operation of the swing fin is adjusted not to block an optical path of the optical distance sensor, and a distance to the stacked continuous form is detected.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous paper folding amount detecting method used in a continuous paper electrophotographic apparatus or the like. 2. Description of the Related Art Conventionally, paper folding of a continuous paper electrophotographic apparatus is performed from a swing fin to a height of continuous paper stacked on a stacker table in order to alternately fold a transported paper along perforations. The distance is constant.
To this end, the paper folding unit of the conventional continuous paper electrophotographic apparatus includes a swing fin that folds the continuous paper by a swinging operation while feeding the paper, a stacker table that stacks the continuous paper that the swing fin folds, and a fixed fin from the swing fin. A light source disposed below by a distance, and an optical sensor disposed at a position opposite to the light source so as to form an optical path in the width direction of the paper, being horizontal to the stacked continuous paper, and comprising the light source and the optical When the optical path of the type sensor is interrupted, continuous paper is detected, and when not interrupted, continuous paper is not detected, thereby detecting the height of the stacked continuous paper. [0003] In the paper folding section of the conventional continuous paper electrophotographic apparatus, when the continuous paper folded by the swing fin interrupts the optical path of the light source and the optical sensor, the swinging fin is swung. The height of the continuous paper stacked on the fin and the stacker table may be erroneously detected. An object of the present invention is to accurately detect a distance between a swing fin and continuous paper stacked on a stacker table without erroneously detecting a continuous paper folded by a swing fin. According to the present invention, there is provided a swing fin for folding continuous paper by a swinging operation while feeding the paper, a stacker table for stacking the continuous paper folded by the swing fin, and a distance to an opposing object. , The direction of detection of the optical distance sensor is determined in the vertical direction from the swing fin side to the continuous paper stacked, and the swing fin swing does not block the optical path of the optical distance sensor. The object is achieved by setting the timing of the moving operation and detecting the distance to the stacked continuous paper. FIG. 1 is a schematic diagram showing a sheet folding section of an electrophotographic apparatus according to the present invention, and FIG. 2 is a control block diagram thereof. 1 and 2, 1 is a swing fin, 2 is continuous paper, 3 is a stacker table, 4 is a position detection sensor, 5 is a table motor, 6 is an optical distance sensor,
7 is a position detection sensor, 8 is an optical distance sensor light receiving section, 9
Is a CPU. In FIG. 1, continuous paper 2 conveyed to a paper folding unit is folded along perforations by swinging operation of a swing fin 1 and is stacked on a stacker table 3. Assuming that the initial position of the swing fin 1 is the position B in FIG. 1, the swing fin 1 is “B → C → B → A →
The swing operation is repeated along the perforations in the order of "B" or "B → A → B → C → B". When the swing fin 1 is at the position A in FIG. 1, the optical path between the optical distance sensor 6 and the continuous paper 2 stacked on the stacker table 3 is blocked by the swing fin 1 and the transported continuous paper 2. The distance L1 between the optical distance sensor 6 and the continuous paper 2 cannot be measured. Therefore, the distance L1 is measured when the swing fin 1 comes to the position C by using the position detection sensor 4 that detects the position of the swing fin 1. For example, by using an encoder and two pairs of light sources and an optical sensor opposed to each other with the encoder interposed therebetween, the output of each is ENC
Assuming that 1, ENC2, the position of the swing fin 1 is shown in Table 1.
Can be detected as follows. [Table 1] In FIG. 2, the position detection sensor 4 can be constituted by an encoder, two pairs of light sources opposed to each other with the encoder interposed therebetween, and an optical sensor as described above. The position detection sensor receiving section 7 receives the 2-bit output of the position detection sensor 4 and passes the data to the CPU 9. Optical distance sensor 6
Is composed of, for example, an analog output distance measuring sensor,
The distance L1 to the continuous paper stacked on the stacker table 3 is measured. The optical distance sensor receiving unit 8 is configured by an A / D converter or the like, converts analog data of the optical distance sensor 6 into digital data, and transfers the digital data to the CPU 9. The CPU 9 determines that the swing fin 1 has a C value based on the combination of the 2-bit data received from the position detection sensor
Is detected, the A / D converter in the optical distance sensor receiving section 8 is controlled, and the data of the distance L1 detected by the distance measuring sensor is taken. FIG. 3 shows a control timing chart of the present invention. In FIG. 3, when the swing fin 1 swings in the order of "A → B → C", the swing fin direction signal swings in the order of "H" level and "C → B → A". Is at the “L” level. The C position detection signal is generated by the ENC1 signal and the ENC2 signal. When the swing fin 1 detects that the swing fin 1 is at the position C in FIG. 1, the signal becomes "H" level. Since the distance L2 in FIG. 1 is known, the distance L from the swing fin 1 to the continuous paper stacked on the stacker table 3 is L = L1-L.
2 can be calculated. As described above, according to the present invention, the distance between the swing fin and the continuous paper stacked on the stacker table can be reduced without erroneously detecting the continuous paper folded by the swing fin. It can be detected with high accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an embodiment of the present invention. FIG. 2 is a control block diagram showing an embodiment of the present invention. FIG. 3 is a control timing chart showing the embodiment of the present invention. [Description of Signs] 1 is a swing fin, 2 is continuous paper, 3 is a stacker table, 4 is a position detection sensor, 6 is an optical distance sensor, 7 is a position detection sensor receiver, and 8 is an optical distance sensor receiver. is there.

Claims (1)

1. A swing fin for folding continuous paper by a swinging operation while feeding paper, a stacker table for stacking continuous paper folded by the swing fin, and an optical system for detecting a distance to an opposing object. In the continuous paper folding section comprising a distance sensor, the detection direction of the optical distance sensor is determined in the vertical direction from the swing fin side to the stacked continuous paper, and the swing fin of the swing fin that does not block the optical path of the optical distance sensor is defined. A method for detecting a folding amount of continuous paper, wherein a timing of a swinging operation is attained, and a distance to a stacked continuous paper is detected.