JPS63123726A - Sheet set direction acknowledge system for printing device - Google Patents

Abstract

PURPOSE:To fascilitate acknowldge of a sheet set direction without mounting a complicated means, by method wherein the presence of a sheet is detected in a position being spaced away by a ditance which is shorter than the length in a longitudinal direction of a sheet and is longer than the length in a lateral direction. CONSTITUTION:When a distance from a casette mean 1 to a sheet sensor 3 is (d), and when a sheet 5 is sucked by the distance (d), the sheet sensor 3 detects that the sheet 5 is present. In this case, the sheet is sucked by a distance (c) from the sensor mean 3, lengths in a longitudinal and a lateral direction are (b) and (a), respectively, and when the distance (c) being (a)<(c)<(b) is selected, since it is detected that the sheet is present and the sheet is absent, a sheet set direction can be acknowledged.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a paper setting direction recognition method for a printing device [Prior Art] Conventionally, in a printing device capable of handling single sheets, various devices have been applied to the cassette means. By applying this, the paper size can be recognized. For example, it is possible to automatically recognize whether A4 paper or 85 paper is set. However, there is a desire to recognize not only the paper size but also the paper set direction, and in order to be able to automatically recognize this, it is necessary to devise a more complicated device for the cassette means.

[Interstitial Points to be Solved] In the conventional printing apparatus described above, the cassette means is equipped with a recognition means for automatically recognizing the paper setting direction, but the structure is extremely complicated and the cost of the cassette means increases. It had the disadvantage of being connected.

[Means for Solving the Problems] The present invention solves the above-mentioned conventional problems in a paper set direction recognition system of a printing apparatus in which a suction means sucks the paper from a cassette means in which the paper before printing is set.
A sensor means for detecting the presence or absence of the paper is disposed on the suction path of the paper sucked from the cassette means, and is spaced from the sensor means by a distance shorter than the length of the paper in the longitudinal direction and longer than the length of the paper in the lateral direction. The setting direction of the paper is recognized by detecting the presence or absence of the paper to be sucked at the position.

[Embodiments] Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. Reference numeral 1 indicates a cassette means, in which paper 5 before printing is set. Further, the size of the paper set in the cassette means 1 can be recognized by a recognition means provided in the cassette means 1. Reference numeral 2 indicates a suction path when the paper 5 is sucked from the cassette means 1 by the suction means, and the presence or absence of the paper 5 can be confirmed at this time by a paper sensor provided on the suction path 2. Figures 2 and 3
The figure is a simulation of the state in which paper 5 is actually set in FIG. 1. The setting direction of the paper 5 is different between FIG. 2 and FIG. 3. In FIGS. 2 and 3, if the distance from the cassette means 1 to the paper sensor 3 is d, when the paper 5 is first sucked in by a distance d, the paper sensor 3 first detects that the paper 5 is present. Now, consider the case where a distance fic is further inhaled from the sensor means 3. If the lengths of the paper in the longitudinal and transverse directions are b and a, respectively, then if you choose a distance mc that satisfies a < c < b, it is possible to detect the absence of paper in the case of Fig. 2 and the presence of paper in the case of Fig. 3. Therefore, it is possible to recognize the paper setting direction. Usually, C is selected and used such that C=(a+b)/2 holds true.

Note that the setting direction of the paper 5 is determined by a separately provided determining means based on the detection result of the presence or absence of paper by the paper sensor 3.

Further, since the paper sensor 3 is provided in a general printing apparatus, there is no particular cost increase.

Furthermore, if the paper size is the same, for example, if the paper is exclusively used for postcards, a paper size recognition means is not required.

[Effects of the Invention] As explained above, the present invention provides a printing apparatus with a sensor means for detecting the presence or absence of paper, and a distance from the sensor that is shorter than the length of the paper in the longitudinal direction and longer than the length of the paper in the lateral direction. By detecting the presence or absence of paper at a remote location and recognizing the setting direction, the additional effect that the paper setting direction can be easily recognized without providing a complicated recognition means in the cassette means can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the paper setting direction recognition method of the present invention, and FIGS. 2 and 3 are diagrams for explaining the recognition operation of the paper setting direction, respectively. l: Cassette means 2: Suction route 3: Paper sensor 5: Paper

Claims (1)

[Claims] In a paper setting direction recognition method of a printing apparatus in which a suction means sucks the paper from a cassette means for setting paper before printing, a sensor means detects the presence or absence of the paper on a suction path of the paper sucked from the cassette means. is arranged, and the setting direction of the paper is recognized by detecting the presence or absence of the paper to be sucked in at a position separated from the sensor means by a distance shorter than the longitudinal length of the paper and longer than the transverse length of the paper. A paper set direction recognition method for a printing device, characterized by the following.