JP2012143985A - Cutter mechanism of printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter mechanism of a printer that can prevent a rear end part of a cut print medium from adhering to a movable blade or a fixed blade, and can prevent cut waste from being produced.SOLUTION: This cutter mechanism (5) of a printer moves back or forth the movable blade 9 to the fixed blade 10 to cut a strip-like print medium (P) in a desired length. The cutter mechanism (5) has a paper outlet which is adapted to discharge the printed print medium (P). An interlocking mechanism 12 which operates in association with the movable blade 9 includes an extrusion part 25 which extrudes the print medium (P) toward the paper outlet when the print medium (P) is to be cut.

Description

  The present invention relates to a cutter mechanism of a printer that cuts printed paper.

A conventional printer will be described with reference to FIG.
The printer 40 includes a paper supply port 3, a printing unit 4, a cutter unit 41, and a paper discharge port 6.
The paper supply port 3 is formed at a position where the fanfold paper P fed out from the fanfold laminate Pa in which the fanfold paper P is folded in a Z shape can be supplied to the inside of the printer 40 on the back side of the printer 40. . The fanfold paper P is formed so as to be folded for each page.

The printing unit 4 includes a platen roller 7 and a thermal head 8, and the platen roller 7 and the thermal head 8 sandwich and convey the fanfold paper P to print information on characters and barcodes on the fanfold paper P. it can.
The printed fanfold paper P is conveyed to a cutter unit 41 described later.
The fanfold paper P is provided with a thermal layer that generates heat-sensitive color, and information on characters, barcodes, and the like can be printed by a heat generating action of a heat generating element (not shown) of the thermal head 8.

A movable blade 42 and a fixed blade 43 are disposed in the cutter unit 41.
The fixed blade 43 is disposed above the fanfold paper P. Further, the movable blade 42 is disposed below the fanfold paper P, and can move forward and backward toward the fixed blade 43. The movable blade 42 moves toward the fixed blade 43, and the fixed blade 43 and the movable blade 42 are moved. The fanfold paper P can be cut when and overlap.

The paper discharge port 6 is formed at a position where the printed fanfold paper P can be discharged to the outside of the printer 40.
The position where the printed fanfold paper P is cut can be a page cut that cuts for each page, or a plurality of page cuts that cut after connecting a plurality of predetermined pages, depending on the print contents. . However, in the conventional printer, when the fanfold paper P is cut into a plurality of pages, the fanfold paper Pc discharged after the swelling swells, the rear end of the fanfold paper Pc returns to the cutter unit 41 side, and the next printer When the cutting operation is performed, there is a problem in that the rear end side of the fanfold paper Pc is slightly cut and cut waste is generated.

In addition, since the rear end of the fanfold paper Pc is cut, the quality of the printed fanfold paper Pc deteriorates and cannot be used.
Further, this problem can be solved by providing a drawing roller for pulling out the cut fanfold paper, but there is a problem that the printer main body becomes large.

  In Patent Document 1, a cutting unit that cuts printed paper in units of printed matter is provided inside the printer, and a discharge roller that discharges the cut printed matter is provided.

JP 2000-6486 A

The present invention has been made in view of such problems, and an object of the present invention is to provide a printer cutter mechanism in which the rear end portion of the cut print medium is not returned to the cutter portion.
It is another object of the present invention to provide a printer cutter mechanism that can prevent generation of cut waste from a print medium.
It is another object of the present invention to provide a printer cutter mechanism that can prevent a print medium having a deteriorated quality.
Another object of the present invention is to provide a printer cutter mechanism that does not increase the size of the printer.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  The invention of claim 1 is a cutter mechanism for a printer that moves the movable blade (9) toward the fixed blade (10) so as to freely advance and retreat, and cuts the belt-shaped print medium (P) by a desired length, A paper discharge port (6) for discharging the printed print medium, and extruding the print medium on the downstream side of the movable blade toward the paper discharge port when cutting the print medium A cutter mechanism (5) of a printer, wherein the portion (25) is provided in an interlocking mechanism (12) that operates in conjunction with the movable blade.

  According to a second aspect of the present invention, in the cutter mechanism of the printer according to the first aspect, the push-out portion (25) includes an arcuate support portion (26) and a friction portion (27) that contacts the print medium (P). And one end of the arcuate support portion is provided in the interlocking mechanism (12), and the other end is provided with the friction portion (27). The cutter mechanism (5).

  According to a third aspect of the present invention, in the cutter mechanism of the printer according to the second aspect, the movable blade (9) abuts on the support portion (26) while the movable blade (9) is moving toward the fixed blade (10). The printer cutter mechanism (5) is characterized in that a displacement plate (28) for displacing the friction portion (27) toward the paper discharge port (6) is provided.

According to the present invention, the cut paper is prevented from adhering to the movable blade or the fixed blade, and therefore generation of cut waste can be prevented.
Further, since it is possible to prevent the paper from being deteriorated in quality, it is possible to prevent the paper from being wasted. Further, the structure of the printer is not complicated and the size is not increased.

FIG. 2 is a schematic configuration diagram illustrating an example from the side of the printer according to the present invention. It is a block diagram explaining the cutter part of the printer of this invention. It is a block diagram explaining operation | movement of the cutter part of the printer of this invention. It is a schematic explanatory drawing explaining the outline of the cutter part of the printer of this invention. It is the schematic block diagram which showed an example from the side surface of the conventional printer.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment)
An embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part same as the prior art demonstrated previously, and description is abbreviate | omitted.

  The printer 1 mainly includes a paper supply unit 2, a paper supply port 3, a printing unit 4, a cutter unit 5, and a paper discharge port 6.

The paper supply unit 2 is located on the back surface 1a side of the printer 1 and has a space for placing a fanfold laminated body Pa in which the fanfold paper P (print medium) is folded in a Z shape.
The paper supply port 3 is formed in a housing on the back surface 1 a side of the printer 1, and is formed at a position where the fanfold paper P fed from the fanfold laminate Pa can be supplied from the paper supply port 3 to the inside of the printer 1. Yes.
The fanfold paper P is folded for each page, and a detection mark is formed for each page (not shown).
Further, the fanfold paper P has a thermal layer that forms a heat-sensitive color, and is printed by heat-coloring characters, barcode information, and the like by a heat generating action (not shown) of a thermal head 8 described later. can do.

The printing unit 4 is provided with a platen roller 7 and a thermal head 8, and the thermal head 8 is provided so as to be able to contact with and separate from the platen roller 7.
The platen roller 7 is connected to a stepping motor (not shown), and the platen roller 7 is rotatably driven by driving the stepping motor.
The fanfold paper P is sandwiched between the platen roller 7 and the thermal head 8, and the platen roller 7 is driven by a print command from the control unit 30, and the thermal head 8 selectively selects a heating element (not shown). By generating heat, visual information such as characters, symbols, and barcodes can be printed on the thermal layer side of the fanfold paper P.

Next, the cutter unit 5 will be described.
The cutter unit 5 is provided between the printing unit 4 and the paper discharge port 6. The cutter unit 5 is provided in the vicinity of the front surface 1 b of the housing of the printer 1.
The cutter unit 5 has a movable blade 9 and a fixed blade 10. The movable blade 9 is disposed on the back surface side (the surface opposite to the printing surface) of the fanfold paper P. The fixed blade 10 is disposed on the surface side (printing surface) of the fanfold paper P.

  The movable blade 9 is attached to an attachment frame 11 that can move forward and backward toward the fixed blade 10. The fanfold paper P inserted between the movable blade 9 and the fixed blade 10 is cut in the width direction of the fanfold paper P by the movable blade 9 meshing with the fixed blade 10 side by the movement of the mounting frame 11. Can do.

  The attachment frame 11 is provided with an interlocking mechanism 12. The interlocking mechanism 12 is provided with a gear 15 that is rotatably supported by a housing 14 of the cutter unit 5 via a rotation shaft 13. The gear 15 is provided so as to be positioned between the front surface (paper discharge port 6 side) and the back surface (paper supply side) of the housing 14.

Further, a tooth shape (not shown) that is threaded is provided on the outer periphery of the gear 15, and a drive gear 18 that is a worm gear attached to the drive shaft 17 of the cutter motor 16 is engaged therewith. Thereby, the drive force is transmitted to the gear 15 by using the drive gear 18 as a worm gear and the gear 15 as a worm wheel (see FIG. 4).
The cutter motor 16 is controlled so as to be driven alternately in the forward direction and the reverse direction when the fanfold paper P is cut.

  The gear 15 is provided with an eccentric shaft 19 projecting toward the front surface of the mounting frame 11 and a detection hole 20. The eccentric shaft 19 of the gear 15 is inserted into a horizontally long guide hole 21 provided in the mounting frame 11, and the mounting frame 11 moves up and down when the gear 15 rotates forward or reverse.

  In other words, the movable blade 9 moves from the cutting start position to the cutting position (moves upward) to cut the fanfold paper P while the gear 15 rotates halfway in the forward rotation direction (clockwise in FIG. 4), for example. After that, it is returned to the cutting start position. That is, while the gear 15 is rotated halfway in the forward rotation direction, the movable blade 9 moves from the cutting start position to the cutting position to cut the fanfold paper P, and then reverses and returns to the cutting start position. It has become.

  Further, the interlocking mechanism 12 is provided with an interlocking arm 33. The interlocking arm 33 is provided such that one end 33 a is rotatably fitted to the eccentric shaft 19. The interlocking arm 33 is provided such that the other end 33b is rotatably fitted to a shaft 26a of the support portion 26 described later. Furthermore, the interlocking arm 33 is regulated and guided so that the direction in which the other end 33b can be moved by a guide portion (not shown) is the vertical direction in the figure. Therefore, when the gear 15 rotates, the other end 33b and the shaft 26a of the interlocking arm 33 move in the vertical direction in conjunction with the vertical movement of the movable blade 9.

  On both sides of the mounting frame 11, vertically long slots 22 are provided. A guide shaft 23 attached to the housing 14 is inserted into the long holes 22 so that the attachment frame 11 can be guided when the attachment frame 11 moves up and down.

  The detection hole 20 of the gear 15 is detected by a rotation direction detection sensor 24 provided in the housing 14. That is, the rotation direction detection sensor 24 is provided in the vicinity of the gear 15. When the detection hole 20 is detected by the rotation direction detection sensor 24, the gear 15 can rotate in the forward rotation direction by a cut signal from the control unit 30.

An extruding unit 25 that pushes the fanfold paper P toward the paper discharge port 6 is provided on the surface of the movable blade 9 on the paper discharge port 6 side.
The extruding part 25 has a support part 26 and a friction part 27. The support portion 26 can maintain an arcuate shape in a state where no external force is applied.
A shaft 26 a is provided at one end (lower end) of the support portion 26. The shaft 26a is fitted to the other end 33b of the interlocking arm 33 as described above. Further, the other end portion (upper end portion) of the support portion 26 has an open end portion toward the paper discharge port 6, and the friction portion 27 can be provided at the open end portion. Thus, the friction member can be provided apart from the movable blade 9.

The support portion 26 is made of an elastically deformable plastic rod and can be easily deformed by applying an external force.
The friction part 27 is formed in a thin plate shape, and can be composed of a rubber member having a high friction coefficient, for example.

When the movable blade 9 is at the cutting start position, the friction portion 27 is disposed at a position where it does not contact the fanfold paper P.
Further, by moving the movable blade 9 upward, the pushing portion 25 can also be moved upward synchronously. And when the extrusion part 25 moves upward, the surface of the friction part 27 can be contact | abutted to the back surface side of the fanfold paper P. As shown in FIG.

A displacement plate 28 is provided between the friction portion 27 and the movable blade 9.
The displacement plate 28 can be provided with an elongated plate on the side surface of the housing 14 of the cutter unit 5 so as to be along the width direction of the fanfold paper P.
In the middle of the movement of the movable blade 9 upward, the displacement plate 28 comes into contact with the outer side of the arcuate shape of the support portion 26 so that the friction portion 27 moves upward and toward the paper discharge port 6 side (fanfold paper P feeding side). It is provided so that it can be displaced.
When the movable blade 9 is lowered, the pushing portion 25 is also lowered, the contact of the displacement plate 28 is released, and the support portion 26 can return to an arc shape in which no external force is applied.

A sensor unit 29 is disposed below the conveyance path of the fanfold paper P between the paper supply port 3 and the printing unit 4.
The sensor unit 29 can detect a detection mark (not shown) formed on the surface opposite to the print surface of the fanfold paper P, and supplies a detection signal to the control unit 30 when the detection mark is detected. be able to.
The control unit 30 can set a reference for the print start position based on this detection signal, and can output cutting position information for cutting the fanfold paper P to the cutter unit 5.

  The sensor unit 29 includes a light emitting unit and a light receiving unit (both not shown). The light emitting unit emits predetermined light. The light receiving unit receives the light emitted from the light emitting unit as reflected light from the fanfold paper P, and outputs an electrical signal corresponding to the intensity of the received light (the amount of received light per unit time). The sensor unit 29 includes a light emitting unit and a light receiving unit on the back side of the fanfold paper P, and detects a reference mark (not shown) formed by printing or the like on the back side of the fanfold paper P based on the amount of light received by the light receiving unit. I am doing so.

The printer 1 configured as described above can transfer the fanfold paper P from the paper supply port 3 to the printing unit 4 via the guide roller 31 and the sensor unit 29 in response to a printing signal from the control unit 30.
The printer 1 can print on the fanfold paper P transferred to the printing unit 4 by the thermal head 8.
For example, in the case of a multi-page cut in which the printer 1 cuts after a predetermined number of pages (pages) is printed, a cut signal is supplied to the cutter unit 5 after the printing of a plurality of pages, and the cutter motor 16 is driven. The movable blade 9 can be moved upward.

The support portion 26 moves upward in synchronization (interlocking) with the movement of the movable blade 9, and the support portion 26 contacts the displacement plate 28, so that the friction portion 27 is on the back side of the fanfold paper P. Abut.
The movable blade 9 moves further upward to cut the fanfold paper P. Further, the movable blade 9 further slides on the fixed blade 10 and moves upward, so that the friction portion 27 moves in the direction of the paper discharge port 6. Therefore, the rear end portion of the cut fanfold paper P can be moved toward the paper discharge port 6 by the friction portion 27.

Next, when the movable blade 9 reaches the apex, it can descend and return to the origin. When the movable blade 9 returns, the support portion 26 is released (separated) from the displacement plate 28.
Thus, since the fanfold paper P to be cut can be moved toward the paper discharge port 6, the rear end portion of the fanfold paper P is not returned and cut to prevent cut waste. Can do.

In this embodiment, the interlocking arm 33 is provided on the eccentric shaft 19 and the pusher 25 is provided on the interlocking arm 33. However, the pusher 25 can be moved in the vertical direction in conjunction with the operation of the movable blade 9. Any configuration may be used as long as it is configured to be attached to the housing.
Moreover, the support part 26 should just be a material which can be elastically deformed easily, such as a plastic plate and a synthetic resin.
Further, the cutting position of the print medium may be a desired cutting position.

As a printing medium according to the present embodiment, although Fanford paper having a thermal layer has been described, a fanfold is temporarily attached with an adhesive on one side of a mount folded in a Z shape and a label having a thermal layer on the other side. It may be paper.
In addition, a printer that prints characters and barcodes by transferring the ink of the ink ribbon to the print medium may be used.
The present invention can also be applied to a printer that prints by loading a roll-shaped print medium provided in the printer 1 onto the supply shaft 32.

  In the present embodiment, the number, position, shape, and the like of each constituent member are not limited to the above-described embodiment, and can be set to a number, position, shape, and the like suitable for carrying out the present invention. The present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention.

1 Printer (present invention)
2 Paper supply unit 3 Paper supply port 4 Printing unit 5 Cutter unit (cutter mechanism)
6 Paper discharge port 9 Movable blade 10 Fixed blade 12 Interlocking mechanism 19 Eccentric shaft 25 Pushing portion 26 Supporting portion 26a Shaft 27 Friction member 28 Displacement plate 30 Control portion 33 Interlocking arm 40 Printer (conventional)
P Fanfold paper (printing medium)

Claims (3)

A cutter mechanism of a printer that moves a movable blade toward a fixed blade so as to freely advance and retreat, and cuts a belt-like print medium by a desired length,
A paper discharge port for discharging the printed print medium,
When the print medium is cut, an extrusion unit that pushes the print medium downstream of the movable blade toward the paper discharge port is provided in an interlocking mechanism that operates in conjunction with the movable blade. The printer's cutter mechanism. In the cutter mechanism of the printer according to claim 1,
The extruding part has an arcuate support part and a friction part in contact with the print medium,
One end of the bow-shaped support part is provided in the interlocking mechanism, and the other end is provided with the friction part,
The printer's cutter mechanism. The cutter mechanism of the printer according to claim 2,
While the movable blade is moving toward the fixed blade, a displacement plate is provided that contacts the support portion and displaces the friction portion toward the discharge side.
The printer's cutter mechanism.

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