JPH021468B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a device for preventing erroneous insertion of recording paper in a printer device that copies television images and the like onto recording paper.

Conventional configurations and their problems In recent years, there has been a demand for devices that display color displays and hard copy television screens in color. As such a color copying apparatus, there is an apparatus which obtains a color copy by transferring pigments on a transfer paper onto a recording paper using heat from a thermal head.

A conventional example of this method will be explained below.

FIG. 1 shows the main part of the recording section of a color copying apparatus using this type of transfer recording method. 1 is a recording paper cut to a specified size, 2 is an optical sensor A that detects the insertion of the recording paper, and 3 is an optical sensor B that detects the trailing edge of the recording paper and detects the recording paper when the recording paper is ejected. Let's do it. 4 is below the paper guide, 5 is above the paper guide, and 6 is a lever for preventing incorrect insertion of recording paper, which is opened and closed by a solenoid 7. 8 is a drum, 9 is a holder which is a recording paper holding means, 10 is a thermal head, 11 is 3~
Thermal transfer paper is coated with four different colors of dye, and is supplied from a supply reel 12 and wound onto a take-up reel 13.

The operation will be explained below.

When the recording paper 1 is inserted, the optical sensor A2 detects the leading edge of the recording paper, and the incorrect insertion prevention lever 6 is opened by the suction of the solenoid 7, so that the recording paper 1 can be inserted. The recording paper 1 is held by a holder 9 and the drum 8 rotates in the direction of an arrow 14, so that the recording paper 1 is wound around the drum 8. At this time, when the recording paper 1 finishes passing through the optical sensor B3, the suction of the solenoid 7 is stopped and the erroneous insertion prevention lever 6 is closed, thereby preventing erroneous insertion of the recording paper during recording. The thermal head 10 presses the drum 8, generates heat in response to a signal, and transfers the dye on the transfer paper 11 onto the recording paper. When the recording of the first color is completed, the thermal head 10 is separated from the drum 8. In this state, the drum 8 rotates in the direction of the arrow 14. During this time, the transfer paper 11 is wound up by the take-up reel 13, and stops when the second color reaches the heat generation position of the thermal head. When the drum 8 and the transfer paper 11 stop, the thermal head 10 presses the drum 8 and the second color is recorded on the first color.

Thereafter, when a plurality of dyes are transferred in the same manner and recording is completed, the thermal head 10 is separated from the drum 8 as shown in FIG. The drum 8 then rotates in the direction of arrow 15. The recording paper 1 advances along the paper guide 5, leaves the drum 8, and when the optical sensor B3 detects the edge of the recording paper 1, the solenoid 7 sucks it and the erroneous insertion prevention holder 6 opens, allowing it to be ejected.
It is ejected to the insertion port.

The above device for preventing erroneous insertion of recording paper requires a power source such as a solenoid and a detection sensor, which has the drawback of making the device complicated and expensive.

OBJECTS OF THE INVENTION The present invention eliminates the above drawbacks and provides a simple, inexpensive, and reliable erroneous insertion prevention device without using a dedicated power source or detection sensor for the erroneous insertion prevention device.

Structure of the Invention The present invention includes a drum for winding recording paper cut into a prescribed size, a holder for holding only one end of the recording paper on the drum, and a guide for guiding the recording paper from an insertion slot to the holder. and a recording paper incorrect insertion prevention lever that normally prevents the recording paper from passing only in the insertion direction, and a recording head that is in pressure contact with the drum via the recording paper or is arranged with a slight gap, Winding the recording paper around the drum and recording with the recording head,
After recording, the recording paper is ejected from the insertion slot by reversing the drum to obtain recording, and in conjunction with opening and closing of the holder, the lever for preventing incorrect insertion of recording paper is moved when the holder is opened. death,
This is a recording paper insertion prevention device that allows recording paper to be inserted.

DESCRIPTION OF THE EMBODIMENTS FIG. 3 shows the configuration of a recording paper erroneous insertion prevention device in an embodiment of the present invention. In Figure 3, 16
17 is a recording paper cut to a specified size, 17 is below the paper guide, 18 is on the paper guide, 19 is a recording paper incorrect insertion prevention lever, one of which is attached to the paper guide 18, and is linked to the opening and closing of the holder 20. and rotates about the mounting portion 21 as an axis. Reference numeral 22 denotes an optical sensor that detects when recording paper is inserted into the holder 20. 23 is a drum, 24 is a thermal transfer paper, 25 is a supply reel, 26 is a take-up reel, and 27 is a thermal head.

Next, to explain the operation of this device, the third
In the illustrated state, the drum 23 is in the initial position, and the holder 20 is opened by a release means (not shown). The incorrect insertion prevention lever 19 is pushed up by the holder 20 and is in a state where recording paper can be inserted. FIG. 4 shows the state in which recording paper is inserted. When the recording paper 16 is inserted into the holder 20, the optical sensor 22 detects it, and the release means is activated.
The holder 20 is closed and holds the recording paper 16 firmly. At this time, the incorrect insertion prevention lever 19 is lowered by its own weight or by a spring as the holder 20 descends, and contacts the lower paper guide 17 via the recording paper 16, closing the insertion opening and preventing further insertion of recording paper. do. At this time, the holder 20 is separated from the incorrect insertion prevention lever 19. The transfer operation is the same as the conventional one, and the ejecting operation of the recording paper after completion of recording will be explained. When the transfer is completed, as shown in FIG. 5, the thermal head 27 separates from the drum 23. The drum 23 rotates in the direction of arrow 28. The recording paper 16 advances along the paper guide 18 and leaves the drum 23. As shown in FIG. 5, the erroneous insertion prevention lever 19 can be pushed up with a slight force in the recording paper ejection direction, and the recording paper 16 is pushed up on the erroneous insertion prevention lever 19 and ejected to the insertion slot. The state shown in FIG. 4 is obtained. Thereafter, the holder 20 is opened by a release means (not shown) and enters the state shown in FIG. 3, completing the series of recording operations.

As described above, according to this embodiment, a simple, inexpensive, and reliable recording paper insertion prevention device can be realized without requiring a power source such as a solenoid or a detection sensor. In addition,
Although a thermal transfer recording method was used in the embodiment, any method in which recording paper is wound around a drum, recording is performed by a recording head, and after recording, the recording paper is ejected by reversing the drum to obtain a record may be used. , it can also be applied to recording other than thermal transfer recording methods.

Effects of the Invention As described above, according to the present invention, a simple, inexpensive, and reliable recording paper insertion prevention device can be realized without requiring a power source such as a solenoid or a detection sensor. .

[Brief explanation of drawings]

1 and 2 are side views of main parts of a conventional recording paper misinsertion prevention device, and FIGS. 3, 4, and 5 are main parts of a recording paper misinsertion prevention device according to an embodiment of the present invention. FIG. 16...Recording paper, 17...Paper guide bottom, 18...
...Paper guide top, 19...Incorrect insertion prevention lever, 20
... Holder, 22 ... Optical sensor, 23 ... Drum, 24 ... Thermal transfer paper, 25 ... Supply reel,
26...Take-up reel, 27...Thermal head.

Claims (1)

[Claims] 1. A drum that winds recording paper cut to a specified size, a holder that holds only one end of the recording paper on the drum, a guide that guides the recording paper from the insertion slot to the holder, and usually an insertion slot. A recording paper misinsertion prevention lever that prevents the recording paper from passing in only one direction, and a recording head that is in pressure contact with the drum through the recording paper or is arranged with a slight gap, The recording head is configured to wind a sheet of paper, perform recording using the recording head, and after recording, the recording sheet is ejected from the insertion slot by reversing the drum to obtain a recording, and the recording sheet is moved in conjunction with opening and closing of the holder. . A recording paper erroneous insertion prevention device that moves the recording paper erroneous insertion prevention lever when the holder is opened so that recording paper can be inserted.