JPH01104556A - Paper winding mechanism - Google Patents

Abstract

PURPOSE:To prevent the nonconformity of winding by providing a detecting means for detecting the nonconformity in winding a sheet of paper on a rotatable tension arm which gives tension to the sheet of paper being wound onto a paper take-up means. CONSTITUTION:A tension means tor giving an upwardly tensile force is provided on a tension arm 6 and further, detectors 10, 11 for detecting the end position 6a thereof is installed. In this structure, when the breakage of a sheet of paper occurred during the conveyance of the sheet of paper, a take-up shaft 7 is rotated in the B direction after detecting that the tension arm 6 is placed in a position 6a and, if the tension arm 6 remains in the position 6a after a certain time elapsed, judgment is formed to be the breakage of the sheet of paper and the device is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper winding mechanism of a printing device, and more particularly to a paper winding mechanism capable of detecting a malfunction when winding paper.

[Prior Art] Conventionally, this type of paper winding mechanism has a mechanism for detecting defects (for example, tears, jams, slack winding, etc.) during paper winding.
There were no steps provided.

[Problems to be Solved by the Invention] The conventional paper winding mechanism described above does not have a defect detection means when winding the paper, so it cannot detect proper printing and conveyance of the paper, resulting in overprinting, jamming, etc. The drawback is that a large amount of valuable printed information is lost due to tearing or the like.

[Ding stage for solving the problems] The paper winding mechanism of the present invention that solves the above-mentioned conventional problems has the following features:
It has a paper conveying means having a driving means and a paper winding means, and is provided with a rotatable tension arm that applies tension to the paper wound on the paper winding means. It is configured to include a detection means for detecting a problem in winding.

[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of an embodiment of the present invention. 1 is a paper, 2 is a tractor, and a sprocket hole of the paper 1 is engaged with a pin 2a of the tractor 2. 3 is the print head,
4 is a platen, which enables printing on the paper 1 by a serial dot impact method. Further, 5 is a guide pin for the paper l, 6 is a tension arm, and the paper l is guided to this guide bin 5, further guided to the tip of the tension arm 6 having a rotation center 6-1, and then guided to the winding axis. It has a structure that can be wound up into 7 pieces.

Here, the tractor 2 and the winding shaft 7 each have a rotating means (not shown). Further, a tensioning means (spring), not shown, is applied to the tension arm 6 to constantly change the tension upward. Furthermore, tension arm 6
Detectors (sensors) io and it are installed to detect the positions 6a and 6a of the tips, respectively.

First, the operation when paper winding is normal will be explained.

The tractor 2 is rotated in the A direction by a rotating means (not shown). In this case, the line feed G) is controlled by the amount of rotation of the motor. When the paper l is sent out, the tension arm 6, which is given tension on one side, gradually moves upward, and the tension arm 6 is
reach the position. When the detector IO detects that the tension arm 6 has come to the position 6a, the take-up shaft 7 is rotated in the direction B by a rotating means (not shown). When the detector 11 detects that the tension arm 6 has reached the position 6b, the rotation of the winding shaft 7 is stopped. The winding operation is executed by repeating the above operations.

Next, with reference to FIG. 2, detection when paper tear occurs will be described. Even though the take-up shaft 7 is rotated in the direction B after detecting that the tension arm 6 has reached position 6a, the tension remains If the arm 6 maintains the position 6a, it is determined that the paper is torn and the apparatus is stopped.

Next, paper jam detection will be explained with reference to FIG.

In the case of normal conveyance, if the tension arm 6 is always positioned at position 6a every cycle within the feed amount (number of line feeds) of the tractor 2, then the tractor 2
If position 6a is not detected even after sending
It is determined that there is a paper jam and the device is stopped.

[Effect of the invention] Above explanation Ij11. As described above, the present invention has a paper transport means and a paper winding means each having a driving means, and a rotatable tension arm that applies tension to the paper wound by the paper winding means. By providing a detection means that detects problems in paper winding from the position of the arm, it becomes possible to detect problems in paper winding.

This has the effect of minimizing the loss of valuable printed information.

[Brief explanation of the drawing]

1 □ Figure 1 is a schematic configuration diagram of an embodiment of the present invention, Figure 2 is a schematic configuration diagram showing the state when paper tear occurs, and Figure 3
The figure is a schematic configuration diagram showing a state when a paper jam occurs. 12 paper 2: Tractor 3: Printing rod 4 Nib laten 5 N guide pin 6: Rotation center on tension arm 6- 7: Winding shaft 10.11: Detector

Claims (1)

[Claims] It has a paper conveying means having a driving means and a paper winding means, and includes a rotatable tension arm that applies tension to the paper wound on the paper winding means, and the paper winding is carried out from the position of the tension arm. A paper winding mechanism characterized by comprising a detection means for detecting the above defect.