JPH06246989A - Edge cutter for continuous form paper - Google Patents

Abstract

PURPOSE:To form an edge cutter for continuous form paper generating no paper jamming in an edge cutting part by setting the peripheral speed of a circular blade rotated in the feed direction of the continuous form paper so as to make the same faster than the feed speed of a feed means. CONSTITUTION:Continuous form paper P has edge parts (p) having feed holes pa arranged thereto along both left and right side edges thereof and, since the edge parts (p) become unnecessary after printing, the edge parts (p) are cut after the completion of printing. Since the edge parts (p) are provided to both side edges of the continuous form paper P, a pair of attaching plates 1 are erected from the attaching plates of a printer toward the positions opposed to both edge parts (p) of the continuous form paper P. Slitters A each constituted by parallelly arranging a pair of a fixed blade and a circular blade 3 so as to come into contact with the continuous form paper P in the lateral direction thereof are arranged inside a pair of the attaching plates 1. Since the peripheral speed of the circular blade 3 due to a rotary drive means B is set so as to be higher than the feed speed of the continuous form paper P due to a feed means C, the shearing of the edge parts (p) becomes faster than the feed of the continuous form paper P and the paper jamming in the edge cutting parts of the slitters A can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous sheet edge trimming device attached to a printer using continuous sheets.

[0002]

2. Description of the Related Art Conventionally, as a device for cutting an ear portion having a feed hole provided along both side edges of a continuous fan-fold type recording paper, for example, Japanese Utility Model Laid-Open No. 58-1
As disclosed in Japanese Patent Publication No. 01766, a disk-shaped upper blade and a lower blade are provided so as to face both side edges of the recording paper in a state in which their respective blade surfaces are in contact with each other, and the upper blade and the lower blade are rotationally driven, In some cases, the edges of the recording paper conveyed to the upper blade and the lower blade are cut by this blade.

[0003]

In the above-mentioned prior art, when the paper transport speed by the tractor is the same as or faster than the peripheral speed of the upper blade and the lower blade, the recording paper is sufficiently edge-cut at the edge cutting portion by the upper blade and the lower blade. Since the recording paper is fed to the edge cutting portion before the edge cutting is performed, the recording paper may be jammed at the edge cutting portion in a state where the edge cutting is not performed, and the smooth edge cutting and the recording paper may not be conveyed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a continuous sheet edge trimming device which does not cause a paper jam at the edge trimming portion.

[0005]

In order to achieve the above object, a continuous sheet edge trimming device according to the present invention uses a continuous sheet having edge portions in which feed holes are aligned along both side edges in the width direction. And a pair of fixed blades and round blades, which are arranged so as to face each of the above-mentioned both side edges of the printer and are juxtaposed side by side in contact with each other in the width direction of the continuous paper, and a slitter capable of shearing the ears. The transporting means transports the printed continuous paper toward the slitter, and the rotation driving means that rotates the round blade in the transporting direction of the continuous paper by the transporting means. The peripheral speed of the round blade is set to be higher than the carrying speed of the carrying means.

The transfer means may be configured to be driven in conjunction with the rotation drive means.

[0007]

Since the peripheral speed of the round blade is higher than the conveying speed of the conveying means, a sufficient edge cutting speed can be obtained, and jamming of the recording paper at the edge cutting portion can be prevented.

[0008]

EXAMPLES An example of the present invention will be described below.
As shown in FIG. 1, the continuous paper P is a fan-fold type continuous paper, and the feed holes pa are provided along both left and right edges.
Have ears p aligned with each other. After printing, the ears p
Becomes unnecessary. Then, after the printing is completed, the ear portion p is cut off. Since the ears p are provided on both side edges of the continuous paper P, a pair of the mounting plates 1 is provided from a mounting frame (not shown) of the printer toward a position facing both ears p of the continuous paper P. It is standing. Inside each of the pair of mounting plates 1, there is provided a slitter A in which a pair of fixed blades 2 and round blades 3 are juxtaposed so as to contact each other in the width direction of the continuous paper. The line of contact between the fixed blade 2 and the round blade 3 is set so as to coincide with the cutting line of both ears p. Slitter A
A printing unit (not shown) that prints on the continuous paper P and a transport unit (pin feed tractor) (not shown) that transfers the continuous paper to the slitter A are provided upstream of the paper transport direction.

The rotation driving means B for the round blade 3 will be described. The round blade 3 is fixed to the rotary shaft 4, and the rotary shaft 4 is rotatably supported by the mounting plate 1. The rotary shaft 4 is connected at its tip to the shaft of a motor 5, and is driven to rotate in the transport direction of the continuous paper P by the motor 5. The ear portion p cut by the round blade 3 is easily guided downward by the curved surface of the round blade 3. A drive gear 6 is fixed to the rotary shaft 4.

As the conveying means C for the continuous paper P, paper feed rollers 7 and 8 are provided which make elastic contact with the upper and lower surfaces of the continuous paper P. The paper feed rollers 7 and 8 are fixed to the shafts 9 and 10,
The shafts 9 and 10 are rotatably pierced through the mounting plate 1.
In this example, as a means for rotating one paper feed roller 7 in contact with the upper surface of the continuous paper P, a rotation driving means B for the round blade 3 is used.
The configuration interlocked with is shown. That is, since the transmission gear 11 is fixed to the end of the shaft 9 projecting outward from the mounting plate 1 and the rotation of the drive gear 6 is transmitted through the idler 12, the paper feed roller 7 is rounded. It is rotationally driven in the same direction as the blade 3. The shaft 13 is a shaft that rotatably supports the idler 12, and is supported by the mounting plate 1. The rotation of the other paper feed roller 8 in contact with the lower surface of the continuous paper P is elastically contacted with the paper feed roller 7 via the continuous paper P, whereby rotation in a relatively opposite direction is transmitted.

The peripheral speed of the round blade 3 by the rotation driving means B is set to be higher than the conveying speed of the continuous paper P by the conveying means C. In this example, the conveying means C is driven in conjunction with the rotation driving means B, so that the gears 6, 12, 11 are
The number of teeth is the same, and the diameter of the round blade 3 is larger than the diameter of the paper feed roller 7. That is, the shearing speed of the ears p (the peripheral speed Vs of the round blade 3) will be described.
And the radius of the paper feed roller 7 is r, the peripheral speed Vs of the round blade 3: the transport speed of the continuous paper P vs = 2πR: 2πr =
R: r. Since R> r, Vs> vs, and the shearing of the ears p becomes faster than the conveyance of the continuous paper P,
It is possible to avoid paper jams and indentations at the edge cutting portion of the slitter A.

When cutting the edge portion p of the printed continuous paper P, the power of the motor 5 is turned on with the continuous paper P being held by the rollers 7 and 8, and the conveying means C moves from right to left. The continuous paper P is conveyed toward. That is, when the power is turned on, the motor 5 is started, the rotary shaft 4 rotates, and the round blade 3 rotates clockwise, so that the continuous paper P passes between the fixed blade 2 and the round blade 3. The ear p is cut off. As described above, since the shearing speed of the ears p is higher than the conveying speed of the continuous paper P, the cut ears p are guided by the curved shape of the round blade 3 and smoothly discharged downward. The continuous paper P whose edge portion p has been cut passes between the paper feed rollers 7 and 8 and is smoothly discharged. Therefore, it is possible to prevent the continuous paper from jamming at the edge-cutting portion of the slitter A without being edge-cut.

It is not necessary to provide the paper feed rollers 7 and 8 as the conveying means for the continuous paper P, and the platen in the printing means (not shown) upstream of the slitter and the tractor for conveying the continuous paper to the printing position. It may be a conveyance unit that performs a series of operations for discharging continuous paper after passing through the printing position, passing through the edge cutting position, and discharging. Further, the conveying means C may be separately driven without being linked to the rotation driving means B.

[0014]

As described above, according to the present invention,
Since the slitter has a pair of fixed blades and round blades, and the peripheral speed of the round blades is set to be higher than the transport speed of the transporting means for continuous paper, the paper at the edge cutting portion has a simple structure. It is possible to eliminate jams and perform smooth edge cutting.

Further, the structure can be further simplified by interlocking the continuous sheet conveying means with the rotary driving means of the round blade.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 2 Fixed blade 3 Round blade A Slitter B Rotation drive means C Conveying means P Continuous paper p Ear part pa Feed hole

Claims (2)

[Claims] 1. A width direction of the continuous paper, which is arranged so as to face each of the both side edges of a printer using continuous paper having ears in which feed holes are aligned along both widthwise edges. A pair of fixed blades and round blades that are juxtaposed in contact with each other, capable of shearing the ears, a transport means for transporting the printed continuous paper toward the slitter, and the round blades. And a rotational driving means for rotating the continuous blade in the conveying direction of the continuous paper by the conveying means, and the peripheral speed of the round blade is set to be higher than the conveying speed of the conveying means. Cutting device. 2. The edge cutting device for continuous sheets according to claim 1, wherein the conveying means is driven in conjunction with the rotation driving means.