JPH0524678Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a paper guide device for guiding the conveyance of paper used in devices that involve paper conveyance, such as facsimiles and printers.

BACKGROUND ART In recent years, with the spread of personal computers, office computers, mini-computers, etc., various print output terminal devices have become commercially available and have come to be used as an aid to office automation. Under these circumstances, demand for thermal recording devices is increasing because compared to other marking techniques, thermal recording devices are less noisy, more reliable, and can provide high image quality at a lower cost.

In general, thermal recording devices use a thermal head that selectively generates heat in response to image signals to selectively heat thermal recording paper coated with a thermal agent, which is conveyed between the thermal head and a platen roll. , due to discoloration due to thermal changes in thermal recording paper,
It is structured to form figures and letters.
Thermal recording paper is sent out from a rolled supply reel, passes between a thermal head and a platen roll, characters and graphics are recorded on it, is guided by a paper guide, and is fed to a predetermined position by a cutter. After being cut to size, it is output to the output tray.

An example of a recording apparatus using a conventional paper guiding device will be described with reference to FIG.

10 is a thermal recording paper wound around a supply reel 12, and 14 is a thermal head that selectively generates heat in response to an image signal. A shaft 15 is mounted on the upper surface of the thermal head 14 by a driving means (not shown).
A paper conveyance roller (platen roller) 16 that is rotationally driven integrally with the thermal head 14 and the paper conveyance roller 16 is in contact with the thermal recording paper 1.
0 passes. Reference numeral 17 denotes a bearing that rotatably supports the shaft 15 in a casing (not shown). Reference numeral 18 denotes an upper paper guide, which is fixed to a housing (not shown) with screws 20. 22 is a lower paper guide;
It is also fixed to a casing (not shown). 24 is a cutter, and the shaft 2 is driven by a drive means (not shown).
6 and a fixed blade 24b fixed to the lower paper guide 22. 28 is a sensor for detecting a paper jam, and 30 is a pair of paper ejection rollers that are in contact with each other.

However, when a recording command is issued by a control means (not shown), the paper conveying roller 16 is driven by a driving means (not shown) to start conveying the paper, and at the same time, the thermal head 14 starts thermal recording. Thermal recording paper 10 is attached to the upper paper guide 20
The paper is fed forward while being guided by the lower paper guide 22, reaches the paper ejection roller 30, and when the paper has been fed a predetermined length by the paper ejection roller 30, the cutter 2
The rotary blade 24a of No. 4 rotates counterclockwise to cut the thermal recording paper, and is further fed by the paper ejection roller 30 and ejected onto an ejection tray (not shown). If a failure occurs such as the thermal recording paper 10 becoming jammed in the transport path, it is detected by the sensor 28 and notified to the operator by means of a display means (not shown) or the like.

Problems that the invention aims to solve: However, when a problem such as a paper jam occurs, a sensor detects the problem and issues a stop command to the paper transport rollers, and there is a time delay before paper feeding completely stops. There is. During this time, paper is fed one after another from behind the jammed position, and the paper is folded and compressed, making it difficult to remove.In the worst case, you may have to remove the screws, remove the paper guide, and remove the paper. There was a problem that the paper guide or the like may be damaged if the paper is removed by mistake or if the paper guide is forcibly removed.

The present invention was developed in consideration of these points, and its purpose is to prevent the paper from being compressed and to easily remove the paper when a paper jam occurs near the paper guide. It is an object of the present invention to provide a paper guiding device that can perform the following operations.

Means for Solving the Problem A paper guide means having a paper guide section for guiding the advance of the paper is rotatably provided, a part of the paper guide means comes into contact, and the paper guide section guides the paper in a predetermined direction. A rotation limiting member is fixedly provided separately from the paper guide means to limit the rotation of the paper guide means so that the paper guide means is not positioned on the paper side, and the center of gravity of the paper guide means is set at a position on the paper guide means. A paper guide device characterized in that the paper guide means is set at a position apart from a vertical line passing through the rotation center of the paper guide means, so that a part of the paper guide means is normally in light contact with the rotation restriction member due to the action of gravity. It is.

Function According to the present invention, the paper guide means is rotatably provided, and a part of it is normally in light contact with the rotation restriction member due to the action of power, and in this state, the paper guide means is rotated freely. constitutes a part.

If a paper jam occurs due to some abnormality, and pressure is applied to the paper guide section due to the paper becoming jammed or folded in the paper transport path, this will cause the paper guide means to move in a direction in which part of it separates from the rotation restriction member. is passively rotated. Therefore, even if a paper jam occurs, the paper will not be compressed as much.
Damage to each part including the paper guide means is reduced. Then, when the operator removes the jammed paper, by further rotating the paper guide, a space for paper removal can be secured, and the paper can be easily removed.

Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram of a recording device using the paper guide device of the present invention, and the second
The figure is a top view of the main parts of FIG. Components that are the same as those of the prior art shown in FIG. 3 will be described with the same reference numerals.

10 is a thermal recording paper wound on a roll on a supply reel 12, and 14 is a thermal head that selectively generates heat in response to an image signal. A shaft 15 is mounted on the upper surface of the thermal head 14 by a driving means (not shown).
A paper conveyance roller (platen roller) 16 that is rotationally driven integrally with the thermal head 14 and the paper conveyance roller 16 is in contact with the thermal recording paper 1.
0 passes. The shaft 15 is connected to the housing 32 by the bearing 17.
An upper paper guide 34 is rotatably attached to the bearing 17. Upper paper guide 3
4 is formed with a protrusion 34a, and the protrusion 34a
A part of the paper guide is loosely fitted in a circular arc elongated hole 36 formed in the housing 32 to limit one side of the rotation (clockwise rotation) of the paper guide, and a predetermined gap 38
is ensured. Further, during normal operation, the paper guide 34 is lightly biased clockwise by its own weight, a spring, or the like so as to maintain a predetermined gap 38.

A lower paper guide 22 is fixed to the housing 32. A cutter 24 is composed of a rotary blade 24a that is rotationally driven around a shaft 26 by a drive means (not shown) and a fixed blade 24b that is fixed to the lower paper guide 22. 28 is a sensor for detecting a failure such as a paper jam, and 30 is a pair of paper ejection rollers that are in contact with each other.

However, when a recording command is issued by a control means (not shown), the paper conveying roller 16 is driven by a driving means (not shown) to start conveying the paper, and at the same time, the thermal head 14 starts thermal recording.

The thermal recording paper 10 is fed forward while being guided by the upper paper guide 34 and the lower paper guide 22, reaches the paper ejection roller 30, and after being fed a predetermined length by the paper ejection roller 30, the rotary blade of the cutter 24 24a rotates counterclockwise, the thermal recording paper is cut, and the sheet is further fed by the paper ejection roller 30 and ejected onto an ejection tray (not shown).

If the thermal recording paper becomes jammed near the paper guide, it is detected by the sensor 28 and notified to the operator by a display means (not shown) or the like. The operator can easily remove the jammed paper by rotating the paper guide 34 counterclockwise.

According to this embodiment, when a paper jam occurs near the paper guide, if the paper is folded between the upper paper guide 34 and the lower paper guide 22 and pressure is applied to the paper guides 22 and 34, Since the upper paper guide 34 rotates counterclockwise and escapes, the paper is not compressed, and when the operator removes the jammed paper, the upper paper guide 34 can be rotated further counterclockwise. Since the space for paper removal can be secured, the paper removal work can be reduced.

Effects of the invention Since the present invention is configured as detailed above, when a paper jam occurs, the paper will not be compressed, and space for the paper removal work can be secured, so the paper removal work can be done easily. This has the effect that it can be done easily.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of an embodiment of the present invention;
The figure is a top view of the main part of FIG. 1, and FIG. 3 is a schematic configuration diagram of a conventional example. 10...Thermal recording paper, 14...Thermal head, 16...Paper transport roller, 24...Cutter, 28...Sensor, 30...Paper ejection roller pair, 34...Paper guide.

Claims (1)

[Scope of Claim for Utility Model Registration] A paper guide means 34 having a paper guide section for guiding the advance of the paper is rotatably provided, and a part 34a of the paper guide means 34 comes into contact with the paper guide section so that the paper guide section moves in a predetermined direction. A rotation limiting member 36 is fixedly provided separately from the paper guide means 34 to limit the rotation of the paper guide means 34 so that it is not located on the paper side from the paper guide position of the paper guide means 34, and the center of gravity of the paper guide means 34 is By setting the position away from the vertical line passing through the center of rotation of the paper guide means 34, the part 34a of the paper guide means 34 normally lightly hits the rotation limiting member 36 due to the action of gravity. A paper guide device characterized in that the paper guide devices are in contact with each other.