JPH09221267A - Continuous paper discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen folding by conveying the lower portion from perforations in the opposite direction with reverse feed rollers after the perforations of continuous paper pass through paper conveyance rollers, bending the continuous paper at the position of the perforations, inserting it between a paper conveyance roller and a reverse feed roller, folding it at the perforations, and strongly pressing the continuous paper. SOLUTION: When perforations 30 a pass through paper conveyance rollers 11, 12, reverse feed rollers 13, 14 are moved in the directions of arrows F, G to pinch the continuous paper 30 (a). The paper conveyance rollers 11, 12 are continuously rotated to convey the continuous paper 30. The reverse feed rollers 13, 14 are rotated in the directions of arrows H, K, the lower portion from the perforations 30a is fed upward, the continuous paper 30 is bent at the position of the perforations 30a, it is inserted between the paper conveyance roller 11 (or 12) and a reverse feed roller 13 (or 14) (b), it is conveyed until it passes through the contact point of both rollers, and it is strongly pressed while it is folded at the perforations 30a to strengthen folding. Defective loading caused by defective folding can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge device for reliably folding and discharging continuous paper used as output paper of a printer along perforations provided at predetermined intervals.

[0002]

2. Description of the Related Art When discharging continuous paper used as output paper of a printer, a conventional discharge device for folding and discharging the paper along a perforation provided at a predetermined interval is known.
It is mainly based on a so-called perforated self-folding system which expects that continuous paper is dropped on the stacker by its own weight and that it is naturally folded according to the perforation habit.

Since the perforation self-tatching method depends on the perforation fold, the rigidity of the perforation fold depends on the thickness of the continuous paper and the tie-cut ratio of the perforation. Therefore, there is a drawback that a folding failure may occur without being reliably folded along the perforations.

In order to avoid this, Japanese Patent Laid-Open No. 2-1273 is disclosed.
No. 62 discloses a means for enhancing the folding habit of continuous paper.

FIG. 5 is a front view showing an example of such a conventional continuous paper discharging apparatus, and FIG. 6 is a front view showing an operation state of the example of FIG.

In FIG. 5, a pair of paper transport rollers 51
And 52 pinch and discharge the continuous paper 30. A pair of folding blades 53 and 54 are disposed downstream of the sheet conveying rollers 51 and 52 and fixed to rotating shafts 55 and 56, respectively. The rotation shaft 55 and the rotation shaft 56 are separated by a distance L in the discharge direction of the continuous paper 30.

As shown in FIG. 6, when the perforated line 30a of the continuous paper 30 reaches the position of the rotating shaft 55, the rotating shaft 55 and the rotating shaft 56 are rotated in the directions of arrows A and B, respectively. The leading ends of 53 and 54 press the perforations 30a and the lower part of the continuous paper 30, respectively, and the folding habit of the continuous paper 30 is strengthened. In this way, by strengthening the folding habit of the perforations, the occurrence of poor folding when naturally folding according to the folding habit is prevented.

[0008]

In the conventional continuous paper discharging apparatus as described above, in the case of a continuous paper having a small thickness (a small continuous paper amount), the continuous pressure is applied from the perforation by the pressing force of the folding blade. There is another problem that the paper may be torn, which may cause a folding failure of the continuous paper.

[0009]

SUMMARY OF THE INVENTION A continuous paper discharging apparatus according to the present invention is a continuous paper discharging apparatus for a printer provided with perforations at predetermined intervals, and holds and discharges the continuous paper. A pair of paper transport rollers and a pair of reverse feed rollers disposed downstream of the paper transport rollers and in close proximity to the respective paper transport rollers and capable of moving between an operating position and a retracted position. After the perforation of the continuous paper passes through the paper transport roller, the reverse feed roller is moved from the retracted position to the operation position, and the reverse feed roller moves the perforation downward from the perforation of the continuous paper. The continuous paper is transported in the reverse direction, the continuous paper is bent at the perforation position and inserted between the paper transport roller and the reverse transport roller, and the sewing machine is moved by the paper transport roller and the reverse transport roller. After strongly pressing the continuous paper folded in step to strengthen the folding habit, moving the reverse feed roller to the retracted position and discharging the continuous paper by the paper transport roller, further comprising: It is provided with a pair of discharge guides arranged at the operation position of the reverse feed roller so as not to interfere with the reverse feed roller.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention,
2 is a perspective view of the embodiment of FIG. 1, FIG. 3 is a front view showing an example of an electrophotographic printer using the embodiment of FIG. 1, and FIG. 4 is a front view showing an operation state of the embodiment of FIG. It is.

In the printer 1 of FIG. 3, a print image is formed on the continuous paper 30 supplied from the paper box 2 in the image forming section 3, and the continuous paper 30 on which the print image is formed is conveyed by the tractor section 4. Then, the continuous paper 30 which has been fixed in the fixing unit 5 and fixed is dropped by strengthening the crease of the perforations 30a by the paper discharge unit 6, and is stacked on the stacker unit 7 while being folded at the perforations 30a. The stacker unit 7 moves up and down according to the stacking amount of the continuous paper 30.

As shown in FIGS. 1 and 2, a paper discharge unit (discharge device) 6 pinches and discharges a continuous paper 30.
A pair of paper transport rollers 11 and 12 and paper transport rollers 11 and 12 downstream of the paper transport rollers 11 and 12.
, And a pair of discharge guides 15 and 14, which are disposed at positions where the reverse rollers 13 and 14 do not interfere with the reverse rollers 13 and 14, respectively. 16 are provided. The paper transport rollers 11 and 12 are pressed against each other with an appropriate force by a spring (not shown), so that the paper transport rollers 11 and 12 can always transport the continuous paper having different thicknesses with a constant holding force. As shown in FIG. 2, both of the reverse rollers 13 and 14 are divided into four in the axial direction, and the upper portions of the discharge guides 15 and 16 are inserted between them. It does not interfere with the discharge guides 15 and 16. Reverse feeding roller 13
Also, as shown in FIG. 1, the retracted position where the continuous paper 30 discharged by the paper transport rollers 11 and 12 does not come into contact with the paper transport rollers 11 and 12, and the paper transport rollers 11 and 12 as shown in FIG. It is possible to take two positions, that is, an operation position for holding the discharged continuous paper 30.

Next, the sheet discharging section 6 configured as described above.
Will be described with reference to FIGS. 1 and 4.

When the continuous paper 30 having been fixed in the fixing section 5 is conveyed by the tractor section 4 and reaches the position of the paper discharge section 6, as shown in FIG. , And is rotated in the directions of arrows C and D to convey the continuous paper 30 in the direction of arrow E. At this time, the reverse feed rollers 13 and 14 have moved to the retreat position, which is a position away from each other.
Falls naturally under its own weight. When the perforation 30a is transported by an appropriate amount through the paper transport rollers 11 and 12, the reverse transport rollers 13 and 14 move in the directions of arrows F and G as shown in FIG. The operation position is reached, and the continuous paper 30 is nipped. In this state, the sheet transport rollers 11 and 12 are respectively indicated by arrows C and D.
Direction, the continuous paper 30 is conveyed while the reverse feed rollers 13 and 14 are driven by arrows H and K, respectively.
Then, the continuous paper 30 is conveyed in the upward direction (arrow M) from the perforations 30a. Therefore, as shown in FIG. 4B, the continuous paper 30 is bent at the position of the perforation 30a, and the paper transport roller 11 and the reverse transport roller 1 are bent.
3 or between the paper transport roller 12 and the reverse feed roller 14 (in which direction the
at the position of a). When the continuous sheet 30 is conveyed until the perforation 30a of the continuous paper 30 passes through the position of the contact point between the paper transport roller 11 and the reverse feed roller 13 (or the paper transport roller 12 and the reverse feed roller 14), the continuous paper 30 becomes the perforation 30a. Is strongly pressed in the folded state, the folding habit of the perforation 30a is strengthened. When the folding habit of the perforation 30a is strengthened, the reverse feed rollers 13 and 14 move the arrow N and the arrow P as shown in FIG.
And moves to the retracted position to separate from the continuous paper 30. In this state, the paper transport rollers 11 and 12 continue to rotate in the directions of arrows C and D,
Is discharged downward while the perforations 30a are guided by the discharge guide 15 or the discharge guide 16 (arrow E). As described above, since the folding habit at the position of the perforation 30a is strengthened and discharged, when the sheets are stacked on the stacker unit 7, the occurrence of the improper folding due to the improper folding is prevented.

[0016]

As described above, the continuous paper discharging apparatus according to the present invention can move between the operating position and the retracted position downstream of a pair of paper transport rollers for nipping and discharging the continuous paper. A feed roller is provided, and when the perforation of the continuous paper passes through the paper transport roller, the reverse feed roller is moved to the operation position, and the portion below the perforation of the continuous paper is transported by the reverse feed roller in the reverse direction and continuously. After the paper is bent at the perforation and inserted between the paper transport roller and the reverse feed roller, the continuous paper folded at the perforation is strongly pressed by the paper transport roller and the reverse feed roller to strengthen the folding habit. By moving the reverse feed roller to the retracted position and discharging the continuous paper by the paper transport roller, the folding habit at the perforation position can be strengthened without damaging the continuous paper. Therefore there is an effect that can prevent the occurrence of stacking defects due to folding defective when stacked on the stacker unit.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the embodiment of FIG.

FIG. 3 is a front view showing an example of a printer using the embodiment of FIG.

FIG. 4 is a front view showing an operation state of the embodiment of FIG. 1;

FIG. 5 is a front view showing an example of a conventional continuous paper discharge device.

FIG. 6 is a front view showing an operation state of the example of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 2 Paper box 3 Image formation part 4 Tractor part 5 Fixing part 6 Paper discharge part 7 Stacker part 11.12 Paper conveyance roller 13.14 Reverse feed roller 15.16 Ejection guide 30 Continuous paper 30a Perforation 51.52 Paper conveyance Roller 53/54 Folding blade 55/56 Rotation axis

Claims (2)

[Claims] An apparatus for discharging continuous paper for a printer, which is provided with perforations at predetermined intervals, comprising: a pair of paper transport rollers for nipping and discharging the continuous paper; and a downstream of the paper transport roller. A pair of reverse feed rollers disposed in close proximity to each of the paper transport rollers and movable between an operation position and a retracted position, wherein the perforations of the continuous paper are the paper transport rollers. , The reverse feed roller is moved from the retracted position to the operation position, and the reverse feed roller conveys the portion of the continuous paper below the perforation in the reverse direction to transfer the continuous paper to the sewing machine. Folded at the eye position, inserted between the paper transport roller and the reverse feed roller, and strongly pressing the continuous paper folded at the perforation by the paper transport roller and the reverse feed roller A continuous paper discharging apparatus, comprising: moving the reverse feed roller to the retracted position after the reinforcing of the folding habit and discharging the continuous paper by the paper transport roller. 2. The continuous sheet discharge device according to claim 1, further comprising a pair of discharge guides disposed at the operation position of the reverse feed roller so as not to interfere with the reverse feed roller.