JPS6123042A - Recording paper conveying device - Google Patents

Abstract

PURPOSE:To remove a load which is exerted to a recording paper before arrival of the paper at a recording section, by releasing the topmost one of papers stacked in a recording paper supply device and fed therefrom, from the press- contact condition of the paper against a paper feed roller when the topmost paper reaches a recording section. CONSTITUTION:When a recording paper 2 fed from a recording paper supply device reaches its recording position, a solenoid 7 is energized to remove the press- contact force exerted to a paper feed roller 1. That is, a bottom plate 6 coupled to the solenoid 7 by means of a wire 8 is moved by the drive force of the solenoid 7, overcoming the force of a spring 4 such that the topmost one of recording papers 2 is released from the press-contact condition thereof against the paper feed roller 2. Therefore, since the press-contact condition of the topmost paper 2 may be released, a load which is exerted to the recording paper during recording operation may be reduced, and therefore, the conveyance of recording papers may be carried out with a high degree of accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording paper conveying device, and is particularly suitable for use in a paper feeding device and a recording device such as a transfer type current-carrying type thermal recording device, a copying machine, etc. The present invention relates to a high-precision recording paper conveyance device.

BACKGROUND OF THE INVENTION FIG. 2 shows a recording paper feeding device that has conventionally been widely used in this type of recording device, that is, in a recording device in which a recording paper feeding device and a recording section each have an independent paper transport device. FIG.

In the figure, the recording paper supply device has a paper feed row 2α and a recording paper cassette C. A bottom plate e is supported on the recording paper cassette C via a spring d, and a large number of recording papers are mounted on the bottom plate e. It is placed there. f indicates a recording section.

The recording paper 6 stacked on the bottom plate e is pressed against the paper feed roller 2α by a spring d, and when the paper feed roller a is rotated by a drive device (not shown).

The recording sheet in the top layer is fed to the recording section f as shown by the arrow in the figure.

Note that the recording section f also has a paper conveyance device independent of the recording paper supply device.

Even after the top layer of recording paper has reached the recording position of the recording section f and recording has started, if this recording paper is still in contact with the paper feed row 2α, the frictional force caused by this roller is This causes a load that affects the accuracy of the paper conveyance device in the recording section.In such cases, conventional recording paper supply devices reduce the frictional load by cutting off the power to the paper feed roller. I was holding back, but
The frictional force caused by the splashes d and the remaining grains make the operation difficult and inefficient, and there are also problems in paper conveyance accuracy.

Problems to be Solved by the Invention In the conventional apparatus as described above, the frictional force caused by the rollers is a load, and the conveyance accuracy of the paper conveyance device in the recording section decreases, resulting in poor recording accuracy. There was a problem with it being low.

The present invention has been made to solve the problems of the conventional apparatus described above, and improves the accuracy of conveying recording paper in a recording apparatus in which the recording paper supply device and the recording section each have independent paper conveyance devices. This provides a recording paper transport device that can improve recording quality.

Means and Function for Solving the Problems In order to solve the above problems, in the present invention, a recording paper supply device and a recording section are provided in a recording apparatus each having an independent paper transport device, and the recording paper supply device When the top layer of recording paper stacked on the bottom plate of the printer reaches the recording section, a device is provided to release the recording paper from the pressure contact of the paper feed roller. It is designed to remove the load (load of frictional force caused by the paper feed row 2) before the recording section.

Example Embodiments of this invention will be described based on the drawings.

FIG. 1 is a schematic diagram showing a transfer type thermal recording apparatus in which a recording paper conveyance device of the present invention is implemented. In the figure, 1 is a paper feed roller, 2 is a recording paper, 3 is a recording paper cassette, 6 is a bottom plate loaded with recording papers, and 4 is a spring. 7 is a solenoid, and 8 is a wire connected to the bottom plate 6 via a pulley 9. 15. As shown in Figure 1, the recording device has a thermal head + 2. Para po - la 13, ID
The IDP'I4 is wound up from a supply roller 10 toward a take-up roller 11 as shown by an arrow by a drive blow 2 (not shown).

The recording paper 2 currently on the top layer is transferred to the paper feed row 21, and the IDFI 4 is placed between the thermal head 12 and the pack roller 13.
When the IDF 14 is fed together with the recording paper 2, the IDF 14 is taken up by the take-up roller 11, so that the recording paper 2 is conveyed while being recorded.

In this way, when the recording paper 2 conveyed from the recording paper supply device reaches the recording position.

By driving the solenoid 7 to remove the pressing force acting on the paper feed row 21, the driving of the solenoid 7 causes the bottom plate 6, which is connected via the shear wire 8, to resist the force of the spring 4. By moving the recording paper 2 on the top layer so as to release it from pressure contact with the paper feed roller;
Since the uppermost layer of recording paper 2 is released from pressure contact with the paper feed row 21, the load on the recording paper during recording work can be reduced, and therefore the recording paper can be conveyed with high precision. It is something.

Effects of the Invention As described in detail above, the present invention is capable of transporting the top layer of recording paper conveyed from the recording paper supplying device to the recording section when it reaches the recording section, that is, at the time of recording. Since the pressure contact with the paper roller is released, the load applied to the recording paper (before the recording unit) can be removed.

The paper conveyance accuracy during recording is significantly improved, contributing to a significant improvement in recording quality.

[Brief explanation of drawings]

FIG. 1 is a schematic view showing the main parts of a transfer-type thermal recording apparatus in which a recording paper conveying apparatus according to the present invention is implemented, and FIG. 2 is a schematic view of a conventional apparatus.

Claims (1)

[Claims] In a recording apparatus in which a recording paper supply device and a recording section each have an independent paper conveyance device, when the top layer of recording paper stacked on the bottom plate of the above-mentioned paper supply device reaches the recording section, the recording paper is fed. A recording paper conveyance device characterized by being provided with a device for releasing the paper roller from pressure contact.