JP3875049B2 - Paper cutting device and printer using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper cutting device and a printer using the paper cutting device, and more particularly to a paper cutting device capable of cutting paper into a predetermined length and a printer using the paper cutting device.
[0002]
[Prior art]
2. Description of the Related Art A paper cutting device configured to be capable of cutting a paper into a predetermined length after printing a desired image on paper made of roll paper is widely used in printers and the like that are output devices such as personal computers.
[0003]
As a paper cutting device used in such a printer (not shown), as shown in FIG. 6, a fixed blade formed longer (in a direction perpendicular to the paper surface) than the width of the paper (not shown) 1 and the blade edge surface 1a of the fixed blade 1 are arranged in a state where the outer peripheral portion side of the rotary blade 2 is in contact.
The rotary blade 2 is pivotally supported by a cutter shaft 2a, and the cutter shaft 2a is supported by a carriage 3, so that the rotary blade 2 is rotatable. Then, the rotary blade 2 is rotated by moving the carriage 3 along the fixed blade 1 while the rotary blade 2 is in contact with the fixed blade 1.
[0004]
The carriage 3 has an L-shaped support portion 3 a formed at the upper end portion, and the support portion 3 a is supported by a guide member 4 on the fixed blade 1. The guide member 4 is bent at its end upward to form a support portion 4a, and the support portion 3a of the carriage 3 is engaged with the support portion 4a.
When the carriage 3 moves along the fixed blade 1, the rotary blade 2 can move along the fixed blade 1 in a state where the rotary blade 2 is in contact with the fixed blade 1.
[0005]
In addition, paper (not shown) on which desired characters or the like are printed by a thermal head (not shown) on the printer side is rotated at the lower portion of the fixed blade 1 by rotating a paper feed roller (not shown). It is enabled conveyed in the arrow a direction.
The printed paper conveyed in the direction of arrow A is rotated by moving the carriage 3 along the fixed blade 1 when the printed portion is conveyed to the outside (left side in the figure) of the rotary blade 2. The blade 2 moves in contact with the blade edge surface 1 a of the fixed blade 1, and cuts the paper between the rotary blade 2 and the fixed blade 1 by a predetermined length.
[0006]
Such a paper cutting device has a simple structure and can easily cut a roll paper to an arbitrary length, and is widely used in printers as output devices such as personal computers.
[0007]
[Problems to be solved by the invention]
However, since the carriage 3 of the conventional paper cutting device is in a one-point support state in which the support portion 3a located at a position away from the cutter shaft 2a of the rotary blade 2 is supported by the guide member 4, the lower portion of the carriage 3 is There was a possibility that the lower part of the carriage 3 was shaken in the direction of the arrow B because it became free.
As described above , when the lower portion of the carriage 3 moves in the direction of arrow B, for example, when cutting thick paper or the like, the lower portion of the carriage 3 is shaken by the cutting load applied to the rotary blade 2, and the rotary blade 2 and the fixed blade There is a possibility that a gap is generated between the first blade edge surface 1a and thick paper or the like cannot be cut cleanly.
[0008]
The present invention has been made in view of the above-described problems, and prevents the carriage 3 from shaking while cutting the paper by moving the carriage along the fixed blade, and can cut even thick paper. It is an object of the present invention to provide a paper cutting device and a printer using the same that can clean the surface linearly.
[0009]
[Means for Solving the Problems]
As a first means for solving the above problems, a paper cutting device of the present invention includes a paper, a long fixed blade, and a rotary blade capable of cutting the paper by moving along the fixed blade. A cutter shaft formed at the center of rotation of the rotary blade, a carriage that supports the cutter shaft and rotatably supports the rotary blade, and supports the carriage so as to reciprocate along the fixed blade. A guide member, the guide member is disposed below the fixed blade, the cutter shaft vicinity of the carriage is supported by the guide member, and the carriage is moved along the fixed blade, the rotary blade and so as to cut the paper between the fixed blade, the guide member forms a bent portion by bending the plate-shaped end portion at right angles to said carriage, said cutter Forming engageable with the engaging portion in the bent portion in the vicinity, by engaging the engaging portion to the bent portion, as the rotating blades to restrict the movement away from said fixed blade configuration It was.
[0011]
Further, as a second solving means for solving the above-mentioned problem, the rotary blade is attached to a side surface of a disk-shaped flywheel, the flywheel is disposed below the fixed blade, and an outer peripheral portion of the flywheel. When the O-ring is attached to the fixed blade, the O-ring is elastically contacted with the fixed blade, and the carriage is moved along the fixed blade, the sheet is sandwiched between the O-ring and the fixed blade, The rotary blade is configured to rotate through the flywheel due to the frictional resistance between the paper and the O-ring.
[0012]
Further, as a third solving means for solving the problem, the carriage is stretched around a belt capable of transmitting a driving force of a driving source, and when the driving source is driven, the carriage is interposed via the belt. And the rotary blade moves along the fixed blade.
[0013]
Further, as a fourth means for solving the problems, the rotary blade is configured to be brought into elastic contact with the fixed blade by the urging force of a coil spring wound around the cutter shaft.
[0014]
Further, a printer using the paper cutting device of the present invention as a fifth solution means for solving the above-mentioned problem is characterized in that the paper cutting device according to any one of claims 1 to 5 includes a printing means. And the paper printed by the printing means is cut by the paper cutting device.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a printer using the paper cutting device of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a main part of a printer using a paper cutting device according to the present invention, FIG. 2 is a perspective view of the main part of FIG. 1, and FIG. 3 is a side view of the paper cutting device according to the present invention. 4 is a cross-sectional view of the main part of FIG. 3, and FIG. 5 is a perspective view of the main part of the paper cutting device according to the present invention.
[0016]
A printer using the paper cutting device of the present invention will be described with reference to FIG. 1 as a serial thermal printer, for example. The paper 11 is made of a strip-shaped roll paper wound up in a roll shape. It is placed on the right paper placement section 12. In addition, a paper feed roller 13 for transporting the paper 11 placed on the paper placement unit 12 to a thermal head 16 described later, and a pressure contact roller 14 that is in pressure contact with the paper feed roller 13 with a predetermined pressure contact pressure. It is arranged. The paper feed roller 13 can be driven to rotate in the direction of arrow C or arrow D.
[0017]
When the paper 11 is pressed and sandwiched between the paper feed roller 13 and the pressure roller 14 and the paper feed roller 13 is rotationally driven in the direction of arrow C, the paper 11 can be transported in the direction of arrow E. Yes. Further, when the paper feed roller 13 is rotationally driven in the direction of arrow D, the paper 11 can be returned to the direction of arrow F opposite to the arrow E.
[0018]
Further, on the downstream side of the paper feed roller 13 in the conveyance direction of the arrow E of the paper 11, a flat platen 15 as a printing unit and a thermal that can contact and separate (head up / down) with respect to the platen 15. A head 16 is disposed. The thermal head 16 is formed with a plurality of heating elements (not shown).
When the paper 11 is plain paper, an ink ribbon (not shown) is positioned between the platen 5 and the thermal head 6, and the plurality of heating elements of the thermal head 16 are selectively heated according to the printing information. By doing so, the ink of the ink ribbon is transferred to the paper 11 so that a desired image can be printed.
[0019]
Further, on the downstream side of the thermal head 16 in the conveyance direction of the arrow E of the paper 11, a paper cutting device 17 of the present invention capable of cutting the paper 11 by a predetermined length is disposed. The paper cutting device 17 has a fixed blade 18 made of a long steel plate, and the fixed blade 18 is conveyed between the thermal head 16 in the head-up state and the platen 15 in the conveyance direction indicated by the arrow E. Arranged at the top of the paper 11.
[0020]
A blade edge surface 18 a is formed on the left end surface of the fixed blade 18 in the figure. A rail member 19 that supports a carriage 24 described later so as to be movable along the fixed blade 18 is fixed to the fixed blade 18 with screws or the like. The rail member 19 is formed with a guide groove 19a in which a first engagement portion 24b of a carriage 24 described later can be engaged.
[0021]
A rotary blade 20 having a sharp cutting edge on the outer peripheral portion thereof is in elastic contact with the cutting edge surface 18a of the fixed blade 18, and the rotary blade 20 can reciprocate in the directions of arrows G and H along the fixed blade 18. It has become.
As shown in FIGS. 3 and 4, the rotary blade 20 is screwed to the side surface of a disk-shaped flywheel 21. The flywheel 21 is disposed below the fixed blade 18, and an O-ring 22 made of rubber or the like having a large friction coefficient is attached to the outer peripheral portion of the flywheel 21.
A cutter shaft 23 is inserted through the rotation center of the rotary blade 20 and the flywheel 21.
[0022]
The cutter shaft 23 is supported by a carriage 24 made of a resin material, and a rotary blade 20 attached to the flywheel 21 is rotatable.
A hollow cutter mounting portion 24a is formed in the carriage 24, and the rotary blade 20 and the flywheel 21 are positioned on the cutter mounting portion 24a. Further, in the carriage 24, a groove-like second engaging portion 24c is formed in the vicinity of the cutter shaft 23 on the right side surface in the drawing so that a bent portion 25a of a guide member 25 described later can be engaged.
[0023]
The second engaging portion 24 c has a predetermined gap with the fixed blade 18 and can be engaged with a guide member 25 made of a metal plate or the like disposed under the fixed blade 18.
The guide member 25 has a bent portion 15a whose end is bent at a substantially right angle downward in the figure, and the second engaging portion 24c of the carriage 24 can be engaged with the bent portion 25a.
Then, by engaging the second engaging portion 24c of the carriage 24 with the bent portion 25a, the horizontal movement of the arrow J of the carriage 24 while the carriage 24 is moving along the fixed blade 18 is restricted. It has become.
[0024]
Therefore, the movement of the rotary blade 20 in the direction away from the fixed blade 18 is regulated while the rotary blade 20 is moved along the fixed blade 18 to cut the paper 11.
The carriage 24 is positioned at the home position (not shown) of the moving end in the direction of arrow H shown in FIG. 2 in a standby state where the paper 11 is not cut.
The home position is a position that does not interfere with the conveyance of the paper 11 in the conveyance direction indicated by the arrow E shown in FIG. 1, and the carriage 24 waits until the printed paper 11 is conveyed.
[0025]
A belt mounting portion 24d to which a belt 27 described later can be mounted is formed below the carriage 24 in the figure.
Also, a coil spring 26 is wound around a cutter shaft 23 that protrudes to the left from the rotary blade 20 shown in FIG. 4, and the urging force of the coil spring 26 ensures that the rotary blade 20 comes into elastic contact with the fixed blade 18. ing.
Also, the carriage 24 shown in FIG. 4 has a belt mounting portion 24d formed in the lower portion, and a belt 27 made of a V belt can be mounted on the belt mounting portion 24d. The belt 27 is stretched around a belt drive gear 28 disposed at the lower part of the paper cutting device 17 shown in FIG.
[0026]
Then, when the drive source 29 composed of a motor is driven to rotate, the belt drive gear 28 geared to the drive source 29 is rotated, and the carriage 24 is moved via the belt 27 by arrows G and H as shown in FIG. It can move back and forth in the direction.
Further, in the printer using the paper cutting device of the present invention, the outer peripheral portion is processed into a knurled jagged shape as shown in FIG. 2 on the downstream side of the paper cutting device 17 in the conveying direction of arrow E of the paper 11. A paper discharge roller 30 is provided.
The cut paper 11 cut by the paper cutting device 17 is discharged to the outside of the printer by the rotation of the paper discharge roller 30.
[0027]
The operation of the printer using the paper cutting device 17 of the present invention will be described. First, the front end of the paper 11 placed on the paper placement unit 12 is placed between the paper feed roller 13 and the pressure roller 14. When nipping and rotating the paper feed roller 13 in the direction of arrow C, the leading end of the paper 11 is transported in the transport direction of arrow E.
When the leading end of the paper 11 passes between the thermal head 16 in the head-up state and the platen 15, the thermal head 16 is lowered to sandwich the paper 11 with the platen 15.
[0028]
At this time, when the paper 11 is plain paper, an ink ribbon (not shown) is held between the paper 11 and the thermal head 16.
In this state, a plurality of heat generating elements (not shown) of the thermal head 16 are selectively heated according to the printing information, and the thermal head 16 is moved in the direction of the arrow 11 in the direction of the line of the paper 11 to form the paper 11. A desired image can be printed.
[0029]
When printing of a desired image in the printing area (not shown) of the paper 11 is completed, the paper feed roller 13 is rotated in the direction of arrow C to transport the paper 11 by a predetermined amount in the transport direction of arrow E. Then, a predetermined position where the printed paper 11 is to be cut is aligned with the rotary blade 20.
Next, when the drive source 29 is driven and the carriage 24 is pulled in the direction of arrow G via the belt 27, the rotary blade 20 moves along the fixed blade 18 and the rotary blade 20 rotates.
Then, the sheet 11 is cut between the fixed blade 18 and the rotary blade 20, and the cut sheet 11 is discharged outside the printer by the rotation of the discharge roller 30.
[0030]
In the paper cutting device 17 of the present invention as described above, the second engaging portion 24 c in the vicinity of the cutter shaft 23 of the carriage 24 is supported by the guide member 25, so that the rotary blade 20 is separated from the fixed blade 18. Can be controlled. Further, since the first engagement portion 24b of the carriage 24 is supported by the rail member 19 on the fixed blade 18, the vertical movement of the carriage 24 can be restricted.
Therefore, when the paper cutting device 17 of the present invention is used in a printer using roll paper as an output device such as a personal computer, the paper 11 can be cut in a straight line with an arbitrary length.
[0031]
【The invention's effect】
As described above, the paper cutting device according to the present invention supports the vicinity of the cutter shaft of the carriage with the guide member, and moves the carriage along the fixed blade, whereby the paper is cut between the rotary blade and the fixed blade. Since the sheet is cut, the movement of the carriage in the horizontal direction during sheet cutting can be restricted. Therefore, the paper can be cut cleanly in a straight line.
In addition, by engaging the engagement portion of the carriage with the bent portion of the guide member, the movement of the rotary blade in the direction away from the fixed blade is restricted, so that the movement of the carriage can be restricted with a simple structure. The paper cutting device which can be provided can be provided.
Further, by restricting the movement of the rotary blade in the direction away from the fixed blade, it is possible to eliminate paper cutting defects.
[0033]
Further, when the carriage is moved along the fixed blade, the paper is sandwiched between the O-ring and the fixed blade, and the rotary blade is rotated via the flywheel by the frictional resistance between the paper and the O-ring. Therefore, the rotary blade can be reliably rotated without slipping with respect to the fixed blade, and high-quality paper cutting without cutting failure of the paper to be cut can be performed.
[0034]
In addition, when the drive source is driven, the carriage is pulled through the belt, and the rotary blade moves along the fixed blade. Therefore, the carriage can be smoothly moved along the fixed blade. it can.
[0035]
In addition, the rotary blade is elastically contacted with the fixed blade by the urging force of the coil spring wound around the cutter shaft, so that the rotary blade does not leave the fixed blade and cuts high-quality paper. Can do.
[0036]
Further, since the paper cutting device according to any one of claims 1 to 5 is provided with a printing unit, and the paper printed by the printing unit is cut by the paper cutting device, A printer using a paper cutting device that can cleanly cut the paper in a straight line can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a printer using a paper cutting device according to the present invention.
FIG. 2 is a perspective view of the main part of FIG.
FIG. 3 is a side view of a paper cutting device according to the present invention.
4 is a cross-sectional view of the main part of FIG. 3;
FIG. 5 is a perspective view of main parts of a paper cutting device according to the present invention. FIG. 6 is a cross-sectional view of main parts of a conventional paper cutting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Paper 12 Paper mounting part 13 Paper feed roller 14 Pressure roller 15 Platen 16 Thermal head 17 Paper cutting device 18 Fixed blade 18a Blade edge surface 19 Rail member 19a Guide groove 20 Rotary blade 21 Flywheel 22 O-ring 23 Cutter shaft 24 Carriage 24a Cutter attachment portion 24b First engagement portion 24c Second engagement portion 24d Belt attachment portion 25 Guide member 25a Bending portion 27 Belt

Claims (5)

A paper, a long fixed blade, a rotary blade capable of cutting the paper by moving along the fixed blade, a cutter shaft formed at the rotational center of the rotary blade, and a shaft support for the cutter shaft A carriage that rotatably supports the rotary blade, and a guide member that supports the carriage so as to be capable of reciprocating along the fixed blade, the guide member being disposed below the fixed blade, By supporting the vicinity of the cutter shaft of the carriage on the guide member and moving the carriage along the fixed blade, the paper is cut between the rotary blade and the fixed blade , The guide member has a plate-like end bent at a right angle to form a bent portion, and the carriage has an engaging portion that can be engaged with the bent portion in the vicinity of the cutter shaft. The engagement by engaging the engaging portion, the paper cutting device, characterized in that the rotary blade was made to regulate the movement away from the fixed blade. The rotary blade is attached to a side surface of a disc-shaped flywheel, the flywheel is disposed at a lower portion of the fixed blade, an O-ring is attached to an outer peripheral portion of the flywheel, and the O-ring is elastically contacted with the fixed blade. Then, when the carriage is moved along the fixed blade, the paper is sandwiched between the O-ring and the fixed blade, and the frictional resistance between the paper and the O-ring causes the paper to pass through the flywheel. claim 1 Symbol said rotary blade characterized by being adapted to rotate Te mounting paper cutting device. The carriage is stretched around a belt capable of transmitting a driving force of a driving source, and when the driving source is driven, the carriage is pulled through the belt, and the rotary blade moves along the fixed blade. The paper cutting device according to claim 1 or 2 , wherein the paper cutting device is configured to do so. The paper cutting device according to any one of claims 1 to 3 , wherein the rotary blade is brought into elastic contact with the fixed blade by an urging force of a coil spring wound around the cutter shaft. Paper in the paper cutting device according to any one of claims 1 to 4, the printing means is provided, characterized in that the sheet printed with the printing means and adapted to cut in the sheet cutting device Printer using a cutting device.

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