JPS62193866A - Printer - Google Patents

Abstract

PURPOSE:To contrive to obtain a higher throughput, by enabling a paper thickness detecting timing to be switched according to an external command. CONSTITUTION:With a printing paper 1 inserted into a printer, a sensor 2 sends an insertion signal to a controlling part 4. In response to the signal, the controlling part 4 drives a feeding roller 3 to feed the paper 1 to a paper thickness detecting part 5, and drives the detecting part 5 to detect the thickness of the paper 1. When a signal from a switch 6 to the controlling part 4 is a signal for detection of paper thickness of each sheet of the paper, the detection is carried out for each sheet. When the signal from the switch 6 is a signal for detection of paper thickness of only the first sheet, the detection is carried out for only the first sheet. Accordingly, since the timing for detecting the thickness of the printing paper 1 can be selected and the paper thickness detection may be carried out for only the first sheet when the printing papers 1 having the same thickness are successively printed, a higher throughput can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device, and more particularly to a printing device having an automatic paper thickness detection mechanism.

BACKGROUND TECHNOLOGY Conventionally, in printing devices of this type, especially dot impact printers, the distance between the print surface of the print paper and the tip of the print head is minute, so it is necessary to adjust the distance according to the thickness of the print paper. As a means for this purpose, it has a mechanism that automatically detects the paper thickness of printing paper.

This type of system that automatically detects paper thickness performs a detection operation every time printing paper is set in the printing device, so if the paper thickness of the next paper is different from the paper thickness of the previous paper, is very effective, but even when paper of the same thickness is continuously set and printed using an auto-cut sheet feeder, etc., the paper thickness is detected for each sheet, so throughput (processing capacity within a certain period of time) ) had the disadvantage of decreasing.

The present invention was made to eliminate the above-mentioned drawbacks of the conventional printers, and an object of the present invention is to provide a printing device that can improve throughput.

Composition of the Invention The printing device according to the present invention is a printing device that has a mechanism that automatically detects the paper thickness of printing paper attached to a platen, and is capable of switching the paper thickness detection timing according to an external command. It is characterized by

Embodiment Next, an embodiment of a printing apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an automatic paper thickness detection mechanism according to an embodiment of the present invention.

In the figure, the automatic paper thickness detection mechanism of this embodiment includes a sensor 2 that detects insertion of printing paper 1, a feed roller 3 that feeds the printing paper 1, and a control unit 4 that controls paper thickness detection. , a paper thickness detection section 5 for detecting the paper thickness of the printing paper 1, and a switch 6 for selecting the paper thickness detection timing of the printing paper 1.

When printing paper 1 is inserted into a printing device (not shown), sensor 2 sends an insertion signal to control section 4 . Based on this signal, the control section 4 drives the feed roller 3 to feed the printing paper 1 to the paper thickness detection section 5, and then drives the paper thickness detection section 5 to detect the paper thickness of the printing paper 1. At this time, if the signal from the switch 6 to the control unit 4 is a paper thickness detection signal for each sheet, 1
The paper thickness of the printing paper 1 is detected for each sheet, and if the paper thickness detection signal is only for the first sheet, the paper thickness of the first one sheet is detected, and thereafter the printing paper 1 that is continuously inserted is detected. Detection of paper thickness is not performed.

Paper thickness information detected by the paper thickness detection section 5 is sent to the control section 4, and this information is sent from the control section 4 to a print head control section (not shown).

By making it possible to select the detection timing of the paper thickness of the printing paper 1 in this way, and performing paper thickness detection only for the first sheet of printing paper 1 of the same paper thickness when printing continuously, the throughput can be improved. It is possible to measure the improvement in

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, it is possible to provide a printing device that can improve throughput by making it possible to select the paper thickness detection timing of printing paper. There is.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating the automatic paper thickness detection R (horizontal) of an embodiment of the present invention. Explanation of symbols of main parts 2...Sensor 3...Feed roller 4...Control section 5...Paper thickness detection section 6... switch

Claims (1)

[Claims] 1. A printing device having a mechanism for automatically detecting the paper thickness of printing paper attached to a platen, the printing device being characterized in that the paper thickness detection timing can be changed according to an external command.