JP4588101B2 - Roll paper cutter - Google Patents

Description

  The present invention relates to a sheet cutter, particularly a roll paper cutter.

  In ECR (electronic cash register), POS (terminal cash register), ATM (automated cash dispenser), etc., roll paper is often used to create receipts. In this case, the roll paper is sent out from the slits provided in the frame every time printing of each line is finished by a printer or the like arranged on the lower side of the normal frame, and when all printing is finished, the fixed paper is attached to the frame. It is cut by sliding a substantially V-shaped movable blade whose center is recessed on the blade. In order to smoothly feed the roll paper, a paper guide is provided above the fixed blade so that when the roll paper is sent out, the leading end of the roll paper hits the paper guide.

A gap is provided between the paper guide and the fixed blade so that the movable blade can slide.
On the other hand, in recent years, coreless type roll paper that does not have a core material and can use roll paper to the last part is often used to suppress the generation of waste materials due to environmental problems. When the paper is fed out due to the tight curl at the center of the paper, the leading edge may enter the gap between the paper guide and the fixed blade, and a paper jam may occur.
SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a roll paper cutter that does not cause paper jam even when roll paper with a strong curl is used as in the coreless type.

According to the present invention, a frame having a slit through which the roll paper is discharged, and on the roll paper discharge side of the frame, the frame is disposed on the roll paper side of the roll paper with respect to the slit, and on the slit side end A fixed blade having a cutting edge at the edge, and after a predetermined amount of roll paper is discharged from the slit, the roll slides on the frame from the opposite side of the roll paper of the slit to the side of the curl and rolls in cooperation with the fixed blade A movable blade that cuts paper, and on the curl side of the slit, is arranged to extend upward with respect to the frame above the fixed blade, and the lower end is spaced from the fixed blade so that the movable blade can move has a paper guide that are, the movable blade is recessed in a counter-curl side central portion, has a substantially V-shape projecting habit side winding are both wings portions of the side, central portion middle after cutting substantially position of the slit, in being adapted to stop In b Lumpur paper cutter, a paper guide, mounting an auxiliary guide which extends downwardly from the lower end of the paper guide, the lower end of the auxiliary guide to be substantially in contact with the upper surface of the fixed blade outside the movement range of the movable blade, the auxiliary guide There is provided a cutter characterized in that it extends to both sides including the central part in the paper width direction, and the lower end protrudes toward the slit along the shape of the movable blade stopped after cutting the roll paper. The

  In the roll paper cutter configured as described above, the leading end of the roll paper discharged from the slit hits the auxiliary guide and does not enter between the fixed blade and the paper guide.

In the roll paper cutter of the present invention, as described above, the leading edge of the roll paper discharged from the slit hits the auxiliary guide, so even in the final part of the coreless type roll paper with strong curl, it is between the fixed blade and the paper guide. Paper jam can be prevented without getting caught. As a result, the use of coreless type roll paper is promoted, and it can contribute to resource saving and garbage saving.
And since the auxiliary guide extends to both sides including the central part in the paper width direction, and the lower end protrudes to the slit side along the shape of the movable blade stopped after cutting the roll paper, the roll paper discharged from the slit The front end of the paper hits the auxiliary guide immediately after being discharged from the slit over a wide width, and can reliably prevent paper jam.

It is a side view of the 1st reference example. It is a partial top view of the first reference example. It is a fragmentary perspective view of the 1st reference example. It is a fragmentary perspective view of the 2nd reference example. It is a side view of the 3rd reference example. It is a partial top view of the 3rd reference example. It is a fragmentary perspective view of the 3rd reference example. It is a fragmentary perspective view of the 4th reference example. It is a side view of the 4th reference example. It is a partial top view of the 4th reference example. It is a fragmentary perspective view of the embodiment of the present invention. It is a partial top view of the embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a side view illustrating a roll paper cutter according to a first reference example. Referring to FIG. 1, a lower frame 1 and an upper frame 2 are disposed with a gap therebetween. A slit 3 is formed, and a paper guide 4 having the same shape as a conventional one is attached to the upper frame 2.
An auxiliary guide 100 integrally formed with the paper guide 4 extends downward from the bottom of the paper guide 4, and the lower end of the auxiliary guide 100 extends until it is almost in contact with the upper surface of the fixed blade 10 described later.

  A portion of the lower frame 1 on the right side in the drawing is slightly inclined downward in the drawing, and a fixed blade 10 is attached to the inclined portion, and an end surface 11 of the fixed blade 10 is a surface on the right side of the slit 3. It is flush with 3a and its upper edge 12 is sharply shaped.

The movable blade 20 is moved in the left-right direction in the drawing by a driving means (not shown). At this time, the lower surface of the movable blade 20 is in contact with the edge 12 of the fixed blade 10.
FIG. 2 is a top view showing the relationship among the slit 3, the paper guide 4, the fixed blade 10, and the movable blade 20. As shown in FIG. 2, the movable blade 20 has a substantially V shape with a recessed center, small projections 21 at both ends, and a small notch 22 at the center.
Before cutting, the robot stands by at a position where the small protrusions 21 at both ends are on the fixed blade 10 as shown by the solid line in FIG. 2, and after cutting, the center as shown by the one-dot chain line in FIG. The small notch 22 stops at the position where the slit 3 is engaged.
In FIG. 1, the rightmost line of the movable blade 20 indicates a small notch 22.

Returning to FIG. 1, a coreless type roll R of roll paper P is held on the lower side of the lower frame 1 by, for example, a receiver 30 having a V-shaped cross section as illustrated. The bold line indicates the final part of the final roll R currently in use, and the thin one-dot chain line indicates the initial roll R. From there, the roll paper P is fed to the print unit 34 along the guide 31 and a pair of feed rollers 32 at least one of which is driven by the drive means 33. The printing unit 34 includes a printer 35 and a back plate 36 that supports paper from the back during printing.
In addition, arrangement | positioning of the receptacle 30 and the printing part 34 which are shown in FIG. 1 is only an example, and various arrangement | positioning is possible. However, in this case, the roll R needs to be arranged in a direction in which a clockwise curl is attached.

Next, the operation of the apparatus configured as described above will be described.
When the previous cutting is finished, the roll paper P is stopped so that the leading edge contacts the edge 12 of the fixed blade 10 as indicated by a thick solid line, and the movable blade 20 is moved to the standby position on the left side from the slit 3. Yes. In this state, the printer 35 of the printing unit 34 starts the current printing in cooperation with the back plate 36.

  When printing for one line is completed, the feed roller 32 feeds the roll paper for one line. When printing for several lines is completed, the curl is strong at the final portion of the coreless roll paper P, and the leading edge of the roll paper P strongly turns clockwise, but the paper guide 4 as shown by the thick broken line. The auxiliary guide 100 provided below is prevented from entering the gap A between the lower frame 1 and the upper frame 2 and causing a paper jam.

When the necessary amount of printing is completed, for example, the roll paper P is stopped in a state as indicated by a thick dashed line.
Then, the movable blade 20 moves in the right direction in the drawing and the roll paper P is cut, but the center portion is not cut by the notch 22 provided at the center of the movable blade 20 and is connected to the subsequent portion. It is prevented from being blown by wind or the like.
In this case, in the case of complete cutting without being connected to the subsequent portion, the movable blade 20 is moved until the notch 22 of the movable blade 20 is on the right side in the drawing from the slit 3, or the movable blade 20 is movable. It is only necessary that the notch 22 is not provided in the blade 20.
In FIG. 2, a thick solid line indicates the position of the leading edge of the roll paper before printing.
FIG. 3 is a perspective view of the portion of FIG.

  Next, a second reference example will be described with reference to FIG. 4 shown in a perspective view similar to FIG. As shown in FIG. 4, the second reference example is different from the first reference example in that the auxiliary guide 110 is made separately and attached to the paper guide 4, but the other points are the first reference example. It is the same as the reference example, and the operation and effect are the same as those of the first reference example.

Next, a third reference example will be described. 5, 6, and 7 show a third reference example in a side view, a partial top view, and a partial perspective view, respectively, and the auxiliary guide 120 does not interfere with the movement of the movable blade 20. Since the roll paper P coming out from the slit 3 hits the auxiliary guide 120 earlier, the occurrence of paper jam can be prevented more reliably.
The auxiliary guide 120 of the third reference example can also be made separately.

  Next, a fourth reference example will be described. 8, 9, and 10 show a fourth reference example and a partial perspective view, a side view, and a partial top view, respectively, and the auxiliary guide 130 is three-dimensionally formed of a separate member. The tip of the movable blade side that has been squeezed is extended to the closest vicinity of the notch 22 of the movable blade 20 within a range that does not hinder the movement of the movable blade 20. Accordingly, the roll paper P coming out of the slit 3 is immediately guided by the auxiliary guide 130, and the occurrence of paper jam can be prevented more reliably.

  Next, an embodiment of the present invention will be described. 11 and 12 show the embodiments of the present invention in a partial perspective view and a partial top view, respectively. The auxiliary guide 140 is three-dimensionally formed of a separate member, and the first to fourth reference examples are the central portion. It was extended only in the lateral direction. Accordingly, the roll paper P coming out of the slit 3 is immediately guided by the auxiliary guide 140 not only at the central portion but also at the side portions, so that the occurrence of paper jam can be prevented more reliably.

DESCRIPTION OF SYMBOLS 1 Lower frame 2 Upper frame 3 Slit 4 Paper guide 10 Fixed blade 20 Movable blade 30 Receiving part (of roll of roll paper) 34 Print part 100,110,120,130,140 Auxiliary guide P Roll paper

Claims (1)

A frame having a slit through which roll paper is discharged;
On the roll paper discharge side of the frame, a fixed blade that is disposed on the roll paper roll side frame with respect to the slit and has a blade edge on the upper edge of the slit side end,
After the roll paper has been discharged from the slit by a predetermined amount, a movable blade that slides on the frame from the anti-winding side of the roll paper of the slit to the winding side and cuts the roll paper in cooperation with the fixed blade ;
A paper guide disposed on the curl side of the slit above the fixed blade so as to extend upward with respect to the frame and having a lower end spaced from the fixed blade so that the movable blade can move. ,
As the movable blade, the central portion recessed in the counter-curl side, has a substantially V-shape projecting habit side winding are both wings portions of the side, central portion middle after cutting the position of substantially slit, in stops in Carlo Lumpur paper cutter is,
The paper guide, mounting an auxiliary guide which extends downwardly from the lower end of the paper guide, the lower end of the auxiliary guide to be substantially in contact with the upper surface of the fixed blade outside the movement range of the movable blade,
The auxiliary guide extends to both sides including the central part in the paper width direction, and the lower end protrudes toward the slit along the shape of the movable blade stopped after cutting the roll paper,
A cutter characterized by that.

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