JPS61173571A - Thermal recording device - Google Patents

Abstract

PURPOSE:To eliminate malfunction such as slanting recording and to secure recording by providing a couple of paper detection sensors at least at the outside of both ends of a recording area for image receiving paper and detecting the front end of the image receiving paper by those sensor when the image receiving paper is inserted. CONSTITUTION:The paper detection sensors 10 and 11 are positioned at the outside of the recording area W of the image receiving paper 9 and at the inside of the paper size, and also at a place close to a drum. The image receiving paper 9 when inserted is passed between the sensors 10 and 11 and a holder 7 is driven after the paper is detected by the sensor 10 and 11, so that the image receiving paper 9 whose front end is held by the holder 7 is wound around the peripheral surface of the drum and pressed for recording. At this time, the image receiving paper 9 is already passed through the couple of paper detection sensors positioned at least at the outside of both ends of the recording area W, so image receiving paper is not inserted slantingly and no image receiving paper narrower than the recording area is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a thermal recording device for hard copying television images and the like onto recording paper.

Conventional technology When performing color recording, the primary colors of color recording are
After recording one screen with cyan as the first color, the second and third colors are recorded on top of the first color. Common.

When using this method, it is necessary to align the three colors of recording on the receiving paper so that there is no misalignment. Therefore, in order to eliminate this color discrepancy, the image-receiving paper was placed in close contact with a drum with a length corresponding to the length of the image-receiving paper, and the drum was rotated three times, recording one color for each rotation. The recording position is determined by controlling the rotational position of the drum.

For this purpose, it is necessary to wind the image-receiving paper around a drum, and for this purpose, it is necessary to firmly hold the leading edge of the image-receiving paper with a holder 1 as shown in FIG. The plan view and side view of FIG. 2A show a conventional thermal transfer type force 2-recording device. In FIG. 2, 2 is a drum, 3 is an image receiving paper, 4 is a recording head, and 5 is a thermal transfer paper. 6 is a paper detection sensor for detecting the leading edge of the image receiving paper. One paper detection sensor 6 is located approximately at the center of the paper width. When the image receiving paper 3 is inserted into the holder 1, the leading edge is recognized by the paper detection sensor 6, and after the holder 1 is driven, the image receiving paper 3 is inserted into the holder 1. Paper 3 is held in holder 1 (for example, as disclosed in Japanese Patent Application No. 68-36182).

Problems to be Solved by the Invention However, in the configuration of the conventional example, only one paper detection sensor is installed approximately at the center of the paper width, so even if the image receiving paper is slanted, it will not work as usual. It detects the paper and even detects paper that has been recorded diagonally or whose width is narrower than the recording area and executes the recording, which can cause problems such as missing recordings or damage to the drum due to direct transfer to the drum. However, if the image receiving paper is slanted or the paper size is narrow, it is necessary to have a configuration that does not detect the image receiving paper.

The present invention has been made in view of the above-mentioned problems.When inserting a receiving paper, the receiving paper having a sufficient recording area is fixed straight in a predetermined position before proceeding to the next operation, thereby preventing the above-mentioned malfunctions. The object of the present invention is to provide a heat-sensitive recording device that does not cause heat generation.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pair of paper detection sensors at least on the outside of one of both ends of the recording area recorded on the image-receiving paper by the recording head. At the time of insertion, by detecting the leading edge of the image receiving paper with the pair of paper detection sensors, it is determined that the leading edge of the image receiving paper is oblique, and the image receiving paper has a recording width that should be recorded by the recording head. This system detects whether the data is being recorded and records it reliably.

Effect of the Invention With the above configuration, the present invention is capable of reliably detecting the leading edge of the receiving paper by determining whether or not the leading edge of the receiving paper is oblique when inserting the receiving paper, and there is no malfunction caused by recording at an angle, and the width is sufficient for recording. What is being done will be confirmed and recorded.

b. In FIG. 1, 7 is a holder, 8 is a drum, a recording area is W, 9 is a receiving paper, and 10.11 is a paper detection sensor located on the receiving paper 9 outside the recording area W and inside according to the paper size. It is located near the drum. Next, to explain the operation of the embodiment, when inserting the image receiving paper 9, it always passes through the both paper detection sensors 10.11, and after the both paper detection sensors 10.11 detect the paper, the holder 7 is driven, and the leading edge of the image receiving paper 9 is The image-receiving paper 9 held by the holder 7 is wound and pressed onto the circumference of the drum and recorded. At this time, the image-receiving paper 9 passes through a pair of paper detection sensors located at least on the outside of both ends of the recording area W. Paper is never detected. Regarding the operation after recording, the image-receiving paper 9 is carried through the paper detection sensors 1o and 11 to the position at which the image-receiving paper is inserted, and upon this detection, the holder 7 releases the image-receiving paper holding state. In this embodiment, two paper detection sensors have been described, but when processing multiple types of paper, the same effect can be obtained by providing paper detection sensors according to the types. Therefore, the number is not limited to two.

As described in detail, according to the present invention, when inserting the image receiving paper, the image receiving paper is not fixed diagonally to the holder and rolled up diagonally, and the recording area is narrower than the recording area. It is possible to realize an operation in which the image-receiving paper is fixed by a holder only when it is correctly inserted into a predetermined position, without causing a malfunction of holding the image-receiving paper and performing a recording operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the configuration of a thermal recording device in an embodiment of the present invention, where a is a plan view and b is a side view. FIG. 2 is a schematic diagram of the configuration of a conventional thermal recording device, where a is a plan view and b is a side view. 7...Holder, 8...Drum, 9...
...Receiving paper, 10.11...Paper detection sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig.

Claims (1)

[Claims] An image receiving paper, a drum for winding the image receiving paper, a detecting means for detecting the leading edge of the image receiving paper, a paper holder for detecting the image receiving paper by the detecting means, and clamping the leading edge of the image receiving paper on the drum. and a recording head that holds the image receiving paper in pressure contact with the drum and performs recording while rotating the drum, and the detection means is located at least outside of both ends of the width of the recording area of the recording head. A heat-sensitive recording device installed like this.