JP5638196B2 - Recording device - Google Patents

Description

The present invention provides a recording apparatus comprising: a cutter unit that moves in a width direction of a recording medium to be fed; a guide portion that guides the cutter unit; and a round blade that is provided in the cutter unit and cuts the recording medium. Relates to the device.
In the present application, the recording apparatus includes types such as an ink jet printer, a wire dot printer, a laser printer, a line printer, a copying machine, and a facsimile.

  Conventionally, as shown in Patent Documents 1 and 2, a recording apparatus capable of setting roll paper has a cutting section as a cutter apparatus. The cutting section has a cutter motor as a drive source, a cutter unit that moves in the width direction of the roll paper, and a guide rail that guides the cutter unit in the width direction. The cutter unit had a round blade for cutting the roll paper.

FIGS. 21A to 21C are diagrams showing a round blade in the prior art. Among these, FIG. 21 (A) is a plan view of a round blade. FIG. 21B is a side view of the round blade. FIG. 21C is a plan view in which the cutting edge of the round blade is enlarged.
As shown in FIGS. 21A to 21C, the cutting edge portion 101 of the round blade 100 was polished in the circumferential direction of the round blade 100. Accordingly, the polishing marks 102 are formed in the circumferential direction on the cutting edge portion 101 of the round blade 100. And the blade edge | tip part 101 was sharply prepared by grinding | polishing. Therefore, when the round blade 100 is in a new state, it was possible to cut a roll paper having relatively low rigidity.
JP 2005-219178 A JP-A-9-117891

However, when cutting a so-called cross media, which is a hard sheet-like cloth, the cutting edge portion 101 of the round blade 100 is smooth in the circumferential direction, so that the cutting edge portion 101 is difficult to bite into the cross media and cuts well. There is a possibility that it cannot be.
Moreover, the cutting edge part 101 of the round blade 100 is worn by cutting many times. Therefore, the cutting condition when cutting the roll paper is lowered, and there is a possibility that it cannot be cut smoothly. That is, the cut durability was not sufficient.

  The present invention has been made in view of such a situation, and an object thereof is to provide a recording apparatus including a round blade that easily bites into a recording medium and has improved cut durability. .

In order to achieve the above object, a recording apparatus according to a first aspect of the present invention is provided in a cutter unit that moves in a width direction of a recording medium to be fed, a guide portion that guides the cutter unit, and the cutter unit. A surface that forms a cutting edge of the round blade, and the surface that forms the cutting edge of the round blade has an uneven surface extending in a direction intersecting the circumferential direction of the circular blade, and the surface that the uneven surface makes The roughness range is 3.2 to 12.5S.
Here, the “surface roughness” is the maximum height Rmax (Ry) based on the JIS 1994 standard. Specifically, the “maximum height Rmax (Ry)” is two straight lines parallel to the average line of the portion obtained by extracting only the reference length L from the cross-sectional curve, and when the extracted portion is sandwiched, the interval between the two straight lines is determined. It is measured in the direction of the vertical magnification of the cross-sectional curve, and the value is expressed in units of microns (μ = 0.001 mm).

  According to the first aspect of the present invention, the surface forming the cutting edge of the round blade is provided with irregularities extending in a direction intersecting the circumferential direction of the round blade, and the surface roughness created by the irregularities. The range is 3.2 to 12.5S. Therefore, fine saw-like irregularities can be formed on the outer periphery that is the cutting edge of the round blade. Then, the convex portions of the saw-like irregularities can be bitten into the recording medium.

As a result, the cutting edge can bite into the recording medium, and the recording medium can be cut smoothly. In particular, this is effective for so-called cross media, which is a cloth-like medium in which the cutting edge is relatively hard to penetrate.
Moreover, since the said blade edge | tip is a saw-tooth shape, even if it is a case where the said blade edge | tip is worn out by use, this edge can bite into a cross media. That is, even when the cutting edge is worn, the sharpness can be maintained and the durability is excellent.

In particular, it is effective in the range of surface roughness of 3.2 to 12.5S. When the surface roughness is smaller than 3.2S, that is, the surface roughness is made finer, the saw-like irregularities become too fine, and the biting of the blade edge against the cross media is greatly reduced. On the other hand, if it is larger than 12.5S, that is, if the surface roughness is rough, the saw-like irregularities become too rough, and there is a possibility that cutting cannot be performed well. Therefore, the cutting performance and durability can be improved by setting the surface roughness of the cutting edge to the range of 3.2 to 12.5 S.
In addition, the said unevenness | corrugation extended can be easily comprised with the grinding | polishing eyes formed by grinding | polishing. Here, the polishing eye has fine irregularities in the direction intersecting the eye direction. Therefore, fine saw-like irregularities can be formed on the outer periphery that is the cutting edge of the round blade by intersecting the outer periphery that is the cutting edge of the round blade.

According to a second aspect of the present invention, in the first aspect, the unevenness is formed by polishing, and when the round blade is polished in the intersecting direction, the round blade rotates in the circumferential direction, and the intersection The cutting edge is deburred with the polishing eyes in the direction to be left.
Here, “deburring” means removing protrusions formed on the corners of a material when the material is cut or shaved.

  According to the second aspect of the present invention, in addition to the same effects as the first aspect, the blade edge is deburred while leaving the polishing lines in the intersecting direction. Therefore, the cutting edge can be adjusted to some extent, and there is no possibility of rounding the cutting edge. In particular, in the case of a configuration in which shearing is performed by the two round blades, the two blade tips rub against each other.

According to a third aspect of the present invention, in the first or second aspect, the cutter unit includes, as the round blade, a first round blade provided on one surface side of a recording medium, and the round blade, A second round blade provided on the other surface side opposite to the one surface, and the first round blade and the second round blade cooperate to shear the recording medium. It is characterized by.
According to the third aspect of the present invention, in addition to the same effect as the first or second aspect, the first round blade and the second round blade cooperate to shear the recording medium. It is. Therefore, the recording medium can be cut more effectively. At this time, the cutting edges of both the first round blade and the second round blade are polished in the intersecting direction. Therefore, saw-like irregularities are formed on both of the blade edges, and the saw-like irregularities can surely bite against a cross medium which is an example of a recording medium. As a result, the cross media can be smoothly sheared.

  The contents will be described as follows. For example, when one blade edge is not sawtooth and the sharpness is dull, the cross media slides at one edge and tries to escape from the intersection (shear point) with the other edge. There is a risk that it will not be possible. Therefore, by making both the blade edges into a saw shape, it is possible to improve the biting in both the blade edges. That is, since there is no possibility of the cross media slipping at the cutting edge, it can be sheared smoothly.

According to a fourth aspect of the present invention, in the third aspect, the surface of the blade edge of the first round blade and the surface of the blade edge of the second round blade are radial directions based on the rotation fulcrum of each round blade. The projections and depressions are extended to the surface.
According to the 4th aspect of this invention, in addition to the effect similar to a 3rd aspect, on the surface of the blade edge of the said 1st round blade and the surface of the blade edge of the said 2nd round blade, the said unevenness | corrugation is radial. Is extended. Therefore, when the recording medium is sheared, the tip of the saw-toothed concave and convex portion can be directed to the recording medium. As a result, the saw-tooth-shaped projections of the first round blade and the second round blade can be reliably bitten on the recording medium.

  According to a fifth aspect of the present invention, in the third aspect, the unevenness extended from the surface of the blade edge of the first round blade and the surface of the blade edge of the second round blade is the same as the first circular blade and the first circular blade. 2 At the shear point for shearing the recording medium, which is the front end in the traveling direction when shearing in the range where the round blades overlap, the rotation fulcrum of each of the round blades is set so that the directions of the extended irregularities face each other. It is provided in a direction inclined with respect to the reference radiation direction.

  According to the fifth aspect of the present invention, in addition to the same effects as the third aspect, the unevenness extending on the surface of the blade edge of the first round blade and the surface of the blade edge of the second round blade is , With respect to the radial direction on the basis of the rotation fulcrum of the round blade, so that the direction of the extended projections and depressions face each other at the shear point It is provided in a tilted direction. Therefore, at the shear point, the direction of the tip of the saw-shaped uneven portion can be made substantially perpendicular to the recording medium. In other words, the tip of the saw-toothed convex / concave portion is the most likely to bite into the recording medium. As a result, it is possible to bite the saw-like irregularities on the recording medium more reliably.

According to a sixth aspect of the present invention, in any one of the third to fifth aspects, the first round blade is driven by movement of the cutter unit.
According to the sixth aspect of the present invention, in addition to the same operational effects as in any one of the third to fifth aspects, the first round blade is driven by the movement of the cutter unit. Therefore, the cutting edge of the first round blade can be actively bited against the recording medium. As a result, shearing can be performed more smoothly.

According to a seventh aspect of the present invention, in any one of the third to sixth aspects, a recording unit that performs recording on the recording medium is provided upstream of the cutter unit in the feeding direction of the recording medium. The first round blade is provided on the front side of the recording medium, and the second round blade is provided on the back side, and is provided downstream of the first round blade in the feeding direction of the recording medium. Features.
According to a seventh aspect of the present invention, in any one of the third to sixth aspects, the second round blade is on the back surface side, and the recording medium feed direction downstream side from the first round blade. Is provided. That is, the first round blade on the front side is disposed on the upstream side in the feed direction. Therefore, when the recorded recording medium is sheared, the first round blade contacts the surface of the recording medium upstream in the feed direction from the shearing surface and does not contact the surface downstream of the shearing surface. As a result, there is no possibility of damaging the surface of the recording medium to be recorded and sheared.
For example, when recording is performed by ejecting ink, there is no risk that the ink recorded on the surface will be peeled off due to shearing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external perspective view of an ink jet printer (hereinafter referred to as “printer”) 1 as an example of a “recording apparatus” or “liquid ejecting apparatus” according to the present invention. FIG. 2 is a schematic side view showing a printer main body according to the present invention.
Here, the liquid ejecting apparatus refers to an ink jet recording apparatus, a copying machine, a facsimile, or the like that performs recording on a recording material by ejecting ink from a recording head as a liquid ejecting head to a recording material such as recording paper. In addition to the recording apparatus, instead of ink, a liquid corresponding to a specific application is ejected from the liquid ejecting head corresponding to the recording head to the ejected material corresponding to the recording material, and the liquid is ejected to the ejected material. Used to include the device to be attached.

  Further, as the liquid ejecting head, in addition to the recording head described above, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material used for forming an electrode such as an organic EL display or a surface emitting display (FED). (Conductive paste) A jet head, a bio-organic matter jet head used for biochip manufacturing, a sample jet head for jetting a sample as a precision pipette, and the like.

The printer 1 is a large-sized printer capable of recording up to a recording medium having a relatively large width, such as a JIS standard A0 size or B0 size, or a roll paper P as a recording medium. And a main body unit 2 including a recording execution unit 4 and a paper discharge receiving unit 5.
The main body 2 is provided on an upper portion of a support column 8 erected on the base 9 and has a discharge port 6 for discharging the recorded roll paper P obliquely downward. An opening 7 of the stacker 10 is located below the discharge port 6, and the recorded roll paper P is discharged from the discharge port 6 toward the opening 7 and received by the stacker 10.

  The roll paper supply unit 3 is configured to be capable of storing a roll paper roll (hereinafter referred to as “roll”) R, and the roll paper P is fed out from the roll R and supplied obliquely downward to the recording execution unit 4 that executes recording. Is done. Then, the roll R is set in a roll paper holder (not shown). When supplying roll paper, the roll paper holder is rotated by a spindle motor (not shown) as roll driving means, whereby the roll paper P is supplied downstream.

  The recording execution unit 4 is disposed opposite to the recording head 12 and a recording head 12 (see FIGS. 2 to 4) as a liquid ejecting unit or a recording unit that ejects (ejects) ink as liquid onto the roll paper P. Platen 11 (see FIGS. 2 to 4), a conveyance drive roller (conveyance roller) (not shown) that is provided on the upstream side of the recording head 12 and conveys the roll paper P to the downstream side, and is in pressure contact therewith And a conveyance driven roller (not shown) that rotates in a driven manner.

The recording head 12 is provided on a carriage (not shown), and the carriage has a guide shaft (not shown) extending in the scanning direction (main scanning direction) of the recording head 12 and a guide plate (not shown) extending in the main scanning direction. (Not shown), while being guided by a motor (not shown), moves in the main scanning direction.
On the downstream side of the recording head 12, an air suction means 13 (see FIGS. 2 to 4) as a sheet suction portion is provided, and the air suction means 13 (see FIGS. 2 to 4) allows the recording head 12 to The roll paper P is placed in a regulated state so that it does not float on the downstream side, so that deterioration in recording quality due to the roll paper P rising is prevented.

FIG. 3 is a schematic perspective view showing a cutting portion according to the present invention. FIG. 4 is a schematic side view showing a cutting portion according to the present invention. FIG. 5 is a rear perspective view showing the guide rail 25 of the cutting portion according to the present invention.
As shown in FIGS. 3 and 4, the recording execution unit 4 of the printer 1 is provided with a platen 11. An air suction unit 13 and a cutting unit 20 for cutting the roll paper P are provided on the downstream side in the feeding direction of the platen 11 (in the direction of the arrow Y).

The air suction means 13 is provided on the downstream side in the feeding direction of the platen 11 with a plurality of suction holes 14, 14, 14..., A suction fan 16, and suction pipes 15 that connect the suction holes 14, 14, 14. And have. Then, a negative pressure is generated in the suction pipe so that the roll paper P is sucked to the platen side.
The cutting unit 20 includes a base unit 21, a cutter motor 22, a guide rail 25, and a cutter unit 30.

Among these, the cutter motor 22 can transmit power to the cutter unit 30 via an endless belt 23 (see FIGS. 6 and 9) wound around a driven pulley 24 (see FIGS. 6 and 9). It is provided as follows. The guide rail 25 is configured to guide the cutter unit 30 in the width direction X of the roll paper P.
Here, since the guide rail 25 is provided on the recording surface side which is the surface side of the roll paper P, the printer 1 can be miniaturized. In other words, if the guide rail is provided on the platen side, which is the back side of the roll paper P, the air suction means 13 is already provided on the platen side, which prevents the printer 1 from being downsized.

Furthermore, the cutter unit 30 includes a first cutter 37 and a second cutter 38 (see FIGS. 6 to 11) as will be described later, and is provided so that the roll paper P can be sheared.
Here, since the guide rail 25 is provided above the recording surface side of the roll paper P as described above, paper dust generated when the roll paper P is sheared may adhere to the guide rail 25. Absent. Therefore, there is no possibility that the sliding noise increases in the guide rail 25. Further, the durability of the guide rail 25 can be improved.

As shown in FIGS. 4 and 5, an upstream auxiliary roller holder 50 is provided on the upstream side of the guide rail 25 in the feeding direction. The upstream auxiliary roller holder 50 is provided to rotatably hold a plurality of upstream auxiliary rollers 51, 51, 51... Arranged in the width direction X. The upstream side auxiliary rollers 51, 51, 51... Are provided so as to guide the roll paper P sent from the recording execution unit 4 so as to surely pass below the guide rail 25.
For example, even when the roll paper P is lifted from the platen 11 by the curl of the roll paper P, the lift can be limited. The roll paper P can be guided so as to pass below the guide rail 25.

  Similarly, a downstream side auxiliary roller holder 52 is provided on the downstream side of the guide rail 25 in the feeding direction. The downstream side auxiliary roller holder 52 is provided to rotatably hold a plurality of downstream side auxiliary rollers 53, 53, 53... Arranged in the width direction X. The downstream side auxiliary rollers 53, 53, 53,... Are provided so as to restrict the sheared roll paper P from being lifted by the curl.

  Further, the upstream auxiliary rollers 51, 51, 51... And the downstream auxiliary rollers 53, 53, 53. The cutter unit 30 has cutters (37, 38) as will be described later. Therefore, it is desirable that the user should not touch the cutters (37, 38).

  Therefore, by arranging a plurality of upstream auxiliary rollers 51, 51, 51... And downstream auxiliary rollers 53, 53, 53... In the width direction X on the upstream side and downstream side of the guide rail 25, the user can 37, 38) can be avoided. Further, the downstream auxiliary roller holder 52 can prevent the user from touching the cutter carriage 32.

FIG. 6 is a perspective view showing a state in which the cutting unit according to the present invention is shearing the roll paper. FIGS. 7A and 7B and FIGS. 8A and 8B show a cutter carriage according to the present invention. Of these, FIG. 7A is a side view seen from the 80th digit side. FIG. 7B is a front view. Further, FIG. 8A is a side view as seen from the 1st digit side. FIG. 8B is a rear view.
FIG. 9 is a rear perspective view showing power transmission to the cutter of the cutter unit according to the present invention.

  As shown in FIG. 6, the cutter unit 30 includes a cutter carriage 32 and a slider portion 31. Among these, the cutter carriage 32 includes a first cutter 37 and a second cutter 38 as described later. On the other hand, the slider portion 31 is provided so as to slide in the guide rail. Specifically, the endless belt 23 is wound around a drive pulley (not shown) provided on the 80-digit cutter motor 22 and a driven pulley 24 on the 1-digit side. The slider portion 31 is engaged with the endless belt 23 and receives power from the endless belt 23 and slides in the width direction X.

The cutter unit 30 is provided to shear the roll paper P while moving from the 1st digit side to the 80th digit side. When sheared, the second inclined portion 36 provided on the cutter carriage 32 is provided so as to push the sheared downstream roll paper P2 upward (hereinafter the same) on the recording surface side. At this time, the first inclined portion 35 facing the second inclined portion 36 is inclined with respect to the width direction X so as not to contact the recording surface of the roll paper P.
Hereinafter, the cutter carriage 32 will be described in detail.

As shown in FIGS. 7A and 7B and FIGS. 8A and 8B, the cutter carriage 32 has a first cutter 37 and a second cutter 38 which are round blades. The first cutter 37 is provided above the roll paper P, and the second cutter 38 is provided below the roll paper P (on the back side). And the 1st cutter 37 and the 2nd cutter 38 are comprised so that the roll paper P can be sheared in cooperation from the upper direction and the downward direction of the roll paper P (refer FIG. 11 (B)).
The first cutter 37 is provided upstream of the second cutter 38 in the feeding direction.

Furthermore, a first pre-shear guide portion 39 and a second pre-shear guide portion 40 for guiding the roll paper P to the shear point Q are provided on the downstream side of the cutter carriage 32 in the shear direction.
Here, the “shear direction” refers to a direction from the 1st digit side to the 80th digit side.
Further, the “shear point” refers to a point at the downstream end in the shear direction in an area E (see FIG. 10A) where the first cutter 37 and the second cutter 38 overlap.
Among these, the first pre-shear guide portion 39 is provided above the cutter carriage 32. On the other hand, the second pre-shear guide portion 40 is provided below the first pre-shear guide portion 39 in the cutter carriage 32.

  Therefore, the roll paper P can be guided to the shear point Q even when the roll paper P has a variation in the front and back direction of the recording paper. As a result, the accuracy of the shear position of the roll paper P can be improved. Further, the accuracy of the shear position of the roll paper P can be further improved in combination with the upstream auxiliary rollers 51, 51, 51... And the downstream auxiliary rollers 53, 53, 53.

  Further, the first pre-shear guide portion 39 and the second pre-shear guide portion 40 are configured such that the interval gradually decreases from the 80th digit side toward the first digit side. In the vicinity of the shear point, the thickness of the roll paper P is secured, but is narrowed to such an extent that the other cannot enter the shear point Q. That is, only a specified sheet material such as roll paper, cloth, or film material can enter the shear point Q. And there is no possibility that the others touch the first cutter 37 and the second cutter 38. Further, there is no possibility that the user touches the shear point Q directly. That is, safety can be ensured.

  Furthermore, in the cutter carriage 32, the first guide surface portion 33, the second guide surface portion 34, the first inclined portion 35, and the second guide portion 39 are located one digit side from the first pre-shear guide portion 39 and the second pre-shear guide portion 40. An inclined portion 36 is provided. Of these, the first guide surface portion 33 is provided above the first cutter 37 and the second cutter 38 on the upstream side in the feeding direction. Further, the second guide surface portion 34 is provided upstream of the first cutter 37 and the second cutter 38 in the feeding direction and below the first guide surface portion 33. That is, the first guide surface portion 33 and the second guide surface portion 34 are configured to face each other. Here, the first guide surface portion 33 and the second guide surface portion 34 are provided substantially parallel to the width direction X.

The first inclined portion 35 is provided above the first cutter 37 and the second cutter 38 on the downstream side in the feeding direction. Furthermore, the second inclined portion 36 is provided on the downstream side in the feeding direction from the first cutter 37 and the second cutter 38 and below the first inclined portion 35. That is, the first inclined portion 35 and the second inclined portion 36 are configured to face each other. And the 1st inclination part 35 and the 2nd inclination part 36 incline with respect to the width direction X so that it may gradually displace upwards as it progresses from the 80th digit side to the 1st digit side.
Furthermore, the cutter carriage 32 has a power transmission shaft 41. The power transmission shaft 41 is provided to transmit the moving force to the first cutter 37 when the cutter carriage 32 moves in the width direction X. Next, power transmission to the first cutter 37 will be described.

  As shown in FIG. 9, the cutter carriage 32 includes power transmission means 70 that transmits the force of movement of the cutter carriage 32 to the first cutter 37. The power transmission means 70 includes a first gear 42, a second gear 43, a third gear 44, a fourth gear 48, a composite gear 49 composed of a fifth gear 49a and a first bevel gear 49b, Two bevel gears 45. Among these, the first gear 42 is provided integrally with the power transmission shaft 41. The second gear 43 is provided so as to mesh with the first gear 42. Furthermore, the third gear 44 is provided so as to mesh with the second gear 43.

  The fourth gear 48 is provided to mesh with the third gear 44, and the fifth gear 49 a of the composite gear 49 is provided to mesh with the fourth gear 48. The first bevel gear 49b is formed integrally with the fifth gear 49a and rotates integrally. The second bevel gear 45 is formed integrally with the first cutter 37 and is provided so as to mesh with the first bevel gear 49b. The reason why the first bevel gear 49b and the second bevel gear 45 are provided is that the posture of the first cutter 37, which will be described in detail later, is inclined with respect to the width direction X (FIG. 10B and FIG. (See FIG. 11A). Since the first bevel gear 49b and the second bevel gear 45 are constituted by bevel gears, the first bevel gear 49b and the second bevel gear 45 can be meshed with each other.

  Here, by using a helical tooth, it is possible to transmit power from the helical tooth to a gear which is a straight tooth provided inclined with respect to the width direction X. In such a case, power can be transmitted to the inclined first cutter 37 with a simple configuration. In the present embodiment, the reason for using the bevel gear without using the helical teeth is that the power transmission efficiency is better than when the helical teeth are used. If a helical tooth and a straight tooth with an inclined shaft are meshed with each other, axial friction is further applied to the meshing teeth like a so-called worm gear, so that the transmission efficiency is lowered accordingly. That is, in this embodiment, the 1st cutter 37 can be smoothly rotated by using a bevel gear.

On the other hand, the slider portion 31 is provided with a first slider pulley 46 and a second slider pulley 47 that clamp the upper belt 23 a of the endless belt 23. Among these, the first slider pulley 46 is provided to engage with the power transmission shaft 41 of the cutter carriage 32.
Here, the slider portion 31 is locked to the lower belt 23 b of the endless belt 23.
Therefore, when the cutter motor 22 is driven and the lower belt 23b is pulled toward the 80th digit as shown in FIG. 9, the slider portion 31 and the cutter carriage 32 move toward the 80th digit.

  At this time, the upper belt 23a moves to the first digit side. The first slider pulley 46 receives power from the upper belt 23 a and rotates counterclockwise in the drawing to transmit power to the power transmission shaft 41. The power transmission shaft 41 transmits power to the second gear 43 via the first gear 42. Accordingly, the second gear 43 rotates in the clockwise direction in the drawing. The second gear 43 transmits power to the second bevel gear 45 via the third gear 44, the fourth gear 48, the fifth gear 49a, and the first bevel gear 49b. Accordingly, the first cutter 37 rotates in the clockwise direction in the drawing.

  As described above, when the cutter carriage 32 moves, the first cutter 37 can be driven to rotate. This is a so-called drive blade. The outer peripheral speed of the first cutter 37 at this time is the same as the moving speed of the cutter carriage 32 or slightly higher than the moving speed of the cutter carriage 32. On the other hand, the second cutter 38 is configured to rotate following when the roll paper P is sheared.

Here, since the first cutter 37 is driven, the roll paper P can be positively engaged with the shear point Q of the first cutter 37 and the second cutter 38. Further, since the upper first cutter 37 is driven at the above speed, there is no possibility that a large slip occurs between the recording surface of the roll paper P and the outer peripheral surface of the first cutter 37 when the roll paper P is sheared. .
As a result, there is no possibility that the recording surface of the roll paper P will be damaged near the sheared portion. That is, there is no possibility of damaging the recording surface of the roll paper P by driving the first cutter 37 on the recording surface side of the roll paper P.

FIGS. 10A and 10B are diagrams showing the positional relationship of the cutter teeth. Among these, FIG. 10 (A) is a front view seen from the downstream side in the feeding direction. On the other hand, FIG. 10B is a side view seen from the 80th digit side in the width direction.
Moreover, what is shown to FIG. 11 (A) (B) is the schematic which shows a mode that a 1st cutter and a 2nd cutter shear a roll paper. Among these, FIG. 11 (A) is a plan view seen from the surface side of the upper roll paper. On the other hand, FIG. 11B is a side view seen from the 80th digit side in the width direction.

As shown in FIGS. 10A and 10B and FIGS. 11A and 11B, the cutting edge of the first cutter 37 is provided with a first inclined surface 37a.
Here, the first inclined surface 37 a is inclined with respect to the posture of the first cutter 37.
Similarly, a second inclined surface 38 a is provided at the cutting edge of the second cutter 38. The second inclined surface 38 a is inclined with respect to the attitude of the second cutter 38.

Furthermore, as shown in FIG. 11A, the posture of the first cutter 37 is inclined with respect to the width direction X by an angle θ1 in the counterclockwise direction in the drawing. Specifically, an angle is set so that the 80-digit side (the left side in FIG. 10A), which is the front end side in the traveling direction of the first cutter 37, approaches the second cutter 38 in the feeding direction Y from the same-digit side. It is tilted by θ1.
On the other hand, the posture of the second cutter 38 is inclined with respect to the width direction X by an angle θ2 in the clockwise direction in the drawing. Specifically, an angle is set so that the 80-digit side (the left side in FIG. 10A), which is the front end side in the traveling direction of the second cutter 38, approaches the first cutter 37 in the feeding direction Y from the single-digit side. It is tilted by θ2.

In the present application, the angles θ1 and θ2 are referred to as “shearing angles”. In the present embodiment, it is desirable that the angle θ1 is the same as the angle θ2. The magnitude | size of the inclination with respect to the width direction X of the 1st inclined surface 37a and the 2nd inclined surface 38a can be made substantially the same. Therefore, the vector components in the feeding direction Y of the force received from the roll paper P when shearing can be made substantially the same. As a result, it is possible to improve straightness when the first cutter 37 and the second cutter 38 are sheared.
In the present embodiment, the tilt angles θ1 and θ2 are about 3 degrees.

  Further, as described above, the first cutter 37 and the second cutter 38 are inclined with respect to the width direction X, whereby the contact between the first cutter 37 and the second cutter 38 is made to be a point contact at one place. be able to. Specifically, as shown in FIG. 10A, when viewed from the downstream side in the feeding direction, in the region E where the first cutter 37 and the second cutter 38 overlap, the front side in the traveling direction when shearing (left side in the figure) Only one point at the end can be contacted. That is, the contact is made only at the shear point Q where the roll paper P is bitten. Therefore, the first cutter 37 contacts the second cutter 38 in a range other than the shear point Q, and there is no possibility that the first cutter 37 and the second cutter 38 are separated from each other at the shear point Q. As a result, the roll paper P can be reliably sheared.

As shown in FIG. 11B, when shearing from above and below the roll paper P, when sheared, the sheared upstream roll paper P1 and the sheared downstream roll paper P2 exert a force in the vertical direction. receive. Specifically, the sheared upstream roll paper P <b> 1 receives a downward force by the first inclined surface 37 a of the first cutter 37. Therefore, the sheared upstream roll paper P1 tends to be displaced downward.
On the other hand, the sheared downstream roll paper P <b> 2 receives an upward force by the second inclined surface 38 a of the second cutter 38. Accordingly, the sheared downstream roll paper P2 tends to be displaced upward.

  Here, the air suction means 13 is provided on the upstream side in the feeding direction of the cutter carriage 32 as described above. The air suction means 13 can suck the roll paper P downward by being actuated. When the roll paper P is sheared, the air suction means 13 is operated, so that the position of the roll paper P to be sheared can be accurately determined. As a result, shearing can be performed with high accuracy.

  Furthermore, when sheared, the sheared upstream roll paper P1 receives a downward force by the first inclined surface 37a of the first cutter 37, so that there is no possibility of hindering the effect of the air suction means 13. Since it acts so as to displace the sheared upstream roll paper P1 in the same direction as the air suction means 13 sucks, the effect of the air suction means 13 can be promoted. This is effective when the output of the air suction means 13 is small.

  Further, as described above, the first guide surface portion 33 and the second guide surface portion 34 of the cutter carriage 32 are provided substantially parallel to the width direction X. Accordingly, the sheared upstream roll paper P1 is guided while being in contact with only the second guide surface portion 34. In other words, the shearing is performed while the back surface of the sheared upstream roll paper P1 is pressed against the second guide surface portion 34. On the other hand, the recording surface of the sheared upstream roll paper P <b> 1 is always separated from the first guide surface portion 33. As a result, there is no possibility of damaging the recording surface of the sheared upstream roll paper P1.

Furthermore, as described above, the sheared downstream roll paper P2 tends to be displaced upward by the second inclined surface 38a of the second cutter 38.
Therefore, as described above, the first inclined portion 35 and the second inclined portion 36 of the cutter carriage 32 are inclined with respect to the width direction X so that the first digit side is gradually displaced upward. The degree of the inclination is so gentle that there is no possibility of preventing the sheared downstream roll paper P2 from being displaced upward by the second inclined surface 38a of the second cutter 38, and the sheared downstream roll The back surface of the paper P2 is always in contact with the second inclined portion 36.

The interval between the first inclined portion 35 and the second inclined portion 36 is sufficiently wide so that the recording surface of the sheared downstream roll paper P2 does not contact the first inclined portion 35.
Therefore, the recording surface of the sheared downstream roll paper P <b> 2 can be always separated from the first inclined portion 35. As a result, there is no possibility of damaging the recording surface of the sheared downstream roll paper P2.

  FIGS. 12A and 12B are views showing the cutting edge of the cutter according to the present invention. Among these, FIG. 12 (A) is a plan view of the first cutter. FIG. 12B is a side view of the first cutter. FIG. 13 is an enlarged plan view showing the cutting edge of the cutter according to the present invention. Furthermore, what is shown in FIG. 14 is a figure which shows a mode that the blade edge | tip of the cutter which concerns on this invention is grind | polished. FIG. 15 is a view showing a state of deburring of the blade edge of the cutter according to the present invention.

  As shown in FIGS. 12 (A), 12 (B), and 13, a polishing mark 60 is formed on the first inclined surface 37 a of the cutting edge of the first cutter 37 in the radial direction H <b> 1 centering on the rotation fulcrum of the first cutter 37. Has been. That is, on the first inclined surface 37a, fine protrusions 60 are formed that extend in the radial direction H1. And the 1st inclined surface 37a is formed by the grinding | polishing eyes 60 so that it may become uneven | corrugated in the circumferential direction.

Therefore, as shown in FIG. 13, the contour of the cutting edge of the first cutter 37 can be formed into a so-called saw shape that is slightly jagged.
The same applies to the cutting edge of the second cutter 38. The description is omitted.
Then, by providing the saw-like saw-like portion 61 at the blade edge, the minute convex portions 61a, 61a,... Of the saw-like portion 61 can be actively bited into the roll paper P.

As a result, when the roll paper P is sheared, the cutting edge of the first cutter 37 and the cutting edge of the second cutter 38 can be well bitten into the roll paper P. That is, when shearing, there is no possibility that the cutting edge of the first cutter 37 and the cutting edge of the second cutter 38 slip and cannot be sheared well. As a result, it can be surely sheared.
In particular, it is effective when shearing so-called cross media, which is a relatively hard fabric.

  In such a case, it is desirable that the surface roughness be in the range of 3.2 to 12.5S. When the surface roughness is smaller than 3.2S, the biting of the cutting edge against the cross media is greatly reduced. On the other hand, if it is larger than 12.5S, the cut surface becomes rough, and there is a possibility that cutting cannot be performed well. Therefore, the cut property can be improved by setting the surface roughness of the first inclined surface 37a and the second inclined surface 38a of the blade edge to be in the range of 3.2 to 12.5S.

  Here, the “surface roughness” is the maximum height Rmax (Ry) based on the JIS 1994 standard. Specifically, the “maximum height Rmax (Ry)” is two straight lines parallel to the average line of the portion obtained by extracting only the reference length L from the cross-sectional curve, and when the extracted portion is sandwiched, the interval between the two straight lines is determined. It is measured in the direction of the vertical magnification of the cross-sectional curve, and the value is expressed in units of microns (μ = 0.001 mm).

Further, by shearing the cross media, the cutting edge is easily worn. Even in such a case, as long as the saw-shaped portion 61 having the saw shape is present, the cutting edges of the first cutter 37 and the second cutter 38 can be bitten into the cross media. That is, the configuration having the saw-like portion 61 of the present embodiment has better durability as compared with the configuration of the prior art in which there is a polishing line in the circumferential direction and the cutting edge is not saw-shaped (see FIG. 21).
Subsequently, a method of forming the saw-like portion 61 will be described.

  As shown in FIG. 14, the rotating first grindstone 71 is applied to the first inclined surface 37 a of the stopped first cutter 37. At this time, it is applied so that the rubbing direction is the radial direction H1 of the first cutter 37. Therefore, the polishing marks 60 in the radial direction H1 can be formed on the first inclined surface 37a. And the sawtooth-shaped part 61 can be formed by forming the grinding | polishing eyes 60 also in a blade edge | tip. Moreover, the saw-like part 61 can be formed in the circumferential direction whole range by displacing the 1st cutter 37 little by little in the circumferential direction, and shifting the location where the 1st grindstone 71 contacts in the circumferential direction.

Subsequently, as shown in FIG. 15, so-called deburring is performed using the second grindstone 72.
Here, “deburring” means removing protrusions formed on the corners of a material when the material is cut or shaved.
Specifically, the rod-shaped second grindstone 72 is applied to the cutting edge of the first cutter 37 while the first cutter 37 is rotated in the circumferential direction. At this time, deburring is performed so as to finish in a state where the polishing marks 60 in the radial direction H1 and the saw-toothed portion 61 of the blade edge remain. Specifically, the second grindstone 72 is applied to the cutting edge of the first cutter 37 with a relatively weak force, and deburring is performed while changing the posture of the second grindstone 72 as shown in the figure.
The same applies to the cutting edge of the second cutter 38. The description is omitted.

Then, the excess protrusion can be removed by deburring. In the case of a configuration in which shearing is performed by the two cutters of the first cutter 37 and the second cutter 38, the two blade edges rub against each other, so that it can be sheared smoothly by deburring.
Although the cutting edge of the first cutter 37 is polished in the radial direction H1 by the first grindstone 71, it is not limited to the radial direction H1. If the direction intersects the circumferential direction, the saw-toothed portion 61 can be formed on the cutting edge.

  A printer 1 as a recording apparatus according to the present embodiment includes a cutter unit 30 that moves in the width direction X of a roll paper P that is an example of a recording medium to be sent, and a guide rail 25 that serves as a guide unit that guides the cutter unit 30. A first cutter 37 and a second cutter 38, which are provided in the cutter unit 30 and serve as round blades for cutting the roll paper P. The first inclined surface 37a and the first cutter 37 are the surfaces that form the cutting edge of the first cutter 37. The second inclined surface 38a, which is the surface that forms the cutting edge of the two cutters 38, is provided with polishing marks 60 that are concave and convex in the direction intersecting the respective circumferential directions of the first cutter 37 and the second cutter 38. The surface roughness range created by the polishing mesh 60 is 3.2 to 12.5 S.

Further, in the present embodiment, the polishing marks 60 that are irregularities are formed by polishing, and when the first cutter 37 and the second cutter 38 are polished in the intersecting direction, the first cutter 37 and the second cutter 38 are Each blade is rotated in the circumferential direction, and the cutting edge is deburred in a state in which the polishing marks 60 in the intersecting directions are left.
Still further, in the present embodiment, the cutter unit 30 has the first cutter 37 as the first round blade provided on one surface side of the roll paper P as the round blade, and the one surface opposite to the one surface as the round blade. And a second cutter 38 as a second round blade provided on the other surface side, and the first cutter 37 and the second cutter 38 cooperate to shear the roll paper P. It is characterized by that.

Moreover, in this embodiment, the 1st inclined surface 37a which is the surface of the blade edge of the 1st cutter 37, and the 2nd inclined surface 38a which is the surface of the blade edge of the 2nd cutter 38 are based on the rotation fulcrum of each round blade. The polishing marks 60 are extended in the radial direction H1 (H2 (see FIG. 20)).
Furthermore, in the present embodiment, the first cutter 37 is driven by the movement of the cutter unit 30.

  Further, in the present embodiment, a recording execution unit 4 as a recording unit that performs recording on the roll paper P is provided upstream of the cutter unit 30 in the feeding direction upstream of the roll paper P in the feeding direction. One cutter 37 is provided on the front surface side of the roll paper P, and the second cutter 38 is provided on the back surface side, which is provided downstream of the first cutter 37 in the feeding direction of the roll paper P.

  FIGS. 16A to 16C are schematic plan views showing the state of alignment of the cutter of the present invention. Among these, FIG. 16 (A) is a basic posture of the first cutter and the second cutter. FIG. 16B is a diagram illustrating a state in which the rear side in the traveling direction of the first cutter and the second cutter is tilted from the basic posture to the downstream side in the feeding direction in alignment. Further, FIG. 16C is a diagram illustrating a state in which the rear side in the traveling direction of the first cutter and the second cutter is inclined from the basic posture to the upstream side in the feeding direction in alignment.

  As shown in FIG. 16A, the postures of the first cutter 37 and the second cutter 38 of the present embodiment are inclined with respect to the width direction X, which is the moving direction of the cutter carriage 32 when the roll paper P is sheared. Is provided. Specifically, the posture of the first cutter 37 is provided such that the rear side in the traveling direction when shearing with respect to the width direction X is inclined by θ1 toward the upstream side in the feeding direction. On the other hand, the posture of the second cutter 38 is provided such that the rear side in the traveling direction when shearing with respect to the width direction X is inclined by θ2 toward the downstream side in the feeding direction. Therefore, as described above, the cutting edge of the first cutter 37 can be configured to contact the cutting edge of the second cutter 38 only at one shear point Q on the front side in the traveling direction. As a result, the roll paper P can be reliably sheared.

  Moreover, when shearing, the 1st cutter 37 can be set as the structure which does not surface-contact with the rear-end shear surface K2 (K) of the sheared downstream roll paper P2. Similarly, the 2nd cutter 38 can be set as the structure which does not surface-contact with the front-end | tip shearing surface K1 (K) of the sheared upstream roll paper P1. As a result, it is possible to reduce a load caused by friction between the first cutter 37 and the second cutter 38 and the roll paper P when shearing, as compared with the configuration in which the surfaces are in contact with each other. That is, the roll paper P can be sheared more smoothly.

Furthermore, when shearing, the first cutter 37 and the second cutter 38 advance in the traveling direction while aligning within a so-called looseness range, although only slightly.
Here, “alignment” refers to adjustment by changing the posture slightly to the left and right of the traveling direction so that the cutter advances straightly with respect to the traveling direction.
At this time, as described above, the first cutter 37 is configured not to come into surface contact with the rear end shearing surface K2 of the downstream roll paper P2. Accordingly, the first cutter 37 can shear the roll paper P while aligning without being disturbed by the rear end shearing surface K2 of the downstream roll paper P2.
Similarly, the second cutter 38 is configured not to come into surface contact with the tip shear surface K1 of the upstream roll paper P1. Therefore, the second cutter 38 can shear the roll paper P while being aligned without being disturbed by the front end shearing surface K1 of the upstream roll paper P1.

Specifically, as shown in FIGS. 16B and 16C, the rear side of the first cutter 37 in the moving direction is the downstream side and the upstream side in the feeding direction from the basic posture state shown in FIG. Can tilt to both sides. That is, it is possible to align in both directions.
If the basic posture of the first cutter is in surface contact with the rear end shearing surface of the downstream roll paper, the rear side in the advancing direction cannot be inclined further to the downstream side in the feeding direction. It can tilt only upstream. That is, it is possible to perform alignment by tilting in only one direction. In the present embodiment, the alignment range can be widened as compared with the case.

Here, the “alignment range” refers to a range in which the cutter can be tilted and aligned in the backlash range.
Similarly, the rear side in the traveling direction of the second cutter 38 can be inclined from the basic posture state shown in FIG. 16A to both the downstream side and the upstream side in the feeding direction. In other words, it can be tilted in both directions for alignment. Therefore, this embodiment can widen the alignment range as compared with the configuration in which the basic posture of the second cutter is in surface contact with the front shear surface of the upstream roll paper.

  As a result, it is possible to proceed in the traveling direction while aligning within a wide alignment range in a state where the cutting edge of the first cutter 37 is in point contact with the cutting edge of the second cutter 38 at the shear point Q. That is, the roll paper P can be sheared more accurately and straightly than when the alignment range is narrow. In other words, the load during shearing can be reduced and cut bending can be reduced.

The inkjet printer 1 of the present embodiment includes a cutter unit 30 that moves in the width direction of the roll paper P that is fed, a guide rail 25 that serves as a guide unit that guides the cutter unit 30, and a first circle provided in the cutter unit 30. A first cutter 37 as a blade and a second cutter 38 as a second round blade provided in the cutter unit 30 and shearing the roll paper P in cooperation with the first cutter 37. The posture of the second cutter 38 is characterized in that the front side in the advancing direction of the cutter unit 30 when the roll paper P is sheared is inclined with respect to the width direction in which the cutter unit 30 moves. To do.
In the present embodiment, the first cutter 37 is inclined by θ1, and the second cutter 38 is inclined by θ2.

In the present embodiment, one of the first cutter 37 and the second cutter 38 is driven by the movement of the cutter unit 30.
In the present embodiment, the first cutter 37 is driven.
Furthermore, in this embodiment, the power transmission means 70 which transmits the motive power which the cutter unit 30 moves to one of the 1st cutter 37 and the 2nd cutter 38 is provided, and the power transmission means 70 is the 1st umbrella which is a bevel gear. It has a gear 49 b and a second bevel gear 45.
In the present embodiment, power is transmitted to the first cutter 37.

[Other embodiment 1]
FIGS. 17A and 17B are diagrams showing a cutter according to another embodiment 1. FIG. Among these, FIG. 17 (A) is the figure which looked at the 1st cutter and the 2nd cutter from the feed direction downstream side. On the other hand, FIG. 17B is a sectional view of the first cutter and the second cutter as viewed from the 80-digit side in the width direction toward the 1-digit side.
As shown in FIGS. 17A and 17B, a retracting portion 81 that is retracted from the inner side surface 82 is provided on the blade edge side of the inner side surface 82 of the first cutter 80 according to the other embodiment 1. . This is a so-called meat removal portion.

The retracting portion 81 is formed so as to be gradually deepened from the cutting edge toward the center side of the first cutter 80 in the entire range around the first cutter 80. The inclination is about 2 to 3 degrees with respect to the inner surface 82. The retracting portion 81 is formed in a range in which the thickness of the roll paper P is added to the range overlapping the second cutter 38 from the cutting edge to the center side in the radial direction.
Since other members are the same as those in the above-described embodiment, the same reference numerals are used and description thereof is omitted.

Here, the posture of the first cutter 80 is provided so as not to be inclined with respect to the width direction X. On the other hand, the posture of the second cutter 38 is inclined by θ2 with respect to the width direction X as in the above-described embodiment.
And by providing the evacuation part 81, there is no possibility that the inner surface 82 of the first cutter 80 contacts the rear end shearing surface K2 of the downstream roll paper P2. Therefore, similarly to the above-described embodiment, it is possible to reduce a load caused by friction between the first cutter 80 and the sheared downstream roll paper P2. In other words, the load due to friction can be reduced by providing the retracting portion 81 without providing the first cutter 80 with a rake angle.

Further, since the second cutter 38 is provided with a slant angle, the cutting edge of the first cutter 80 and the cutting edge of the second cutter 38 are brought into contact with each other only at the shear point Q on the front side in the traveling direction, as in the above-described embodiment. Can be made. Therefore, the roll paper P can be reliably sheared.
Furthermore, since the second cutter 38 is provided with a sag angle, the load caused by friction between the second cutter 38 and the sheared upstream roll paper P1 can be reduced, as in the above-described embodiment.

Of course, when the first cutter 80 is not provided with a slant angle, the first bevel gear 49b and the second bevel gear 45 are of course changed to gears with straight teeth. Further, in order to reduce the number of gears, the fourth gear 48 and the composite gear 49 are deleted, and power is directly transmitted from the third gear 44 to a gear replaced with a straight tooth integrally formed with the first cutter 80. You may comprise.
Then, the effect by having provided the evacuation part 81, without providing the staking angle | corner in the 1st cutter 80 is demonstrated.

18 (A) and 18 (B) are plan sectional views showing the gap between the cutter and the shearing surface of the roll paper in comparison with the other embodiment 1 and the above-described embodiment. Among these, FIG. 18A shows another embodiment 1 in which a retracting portion is provided in the first cutter. On the other hand, FIG. 18B is the above-described embodiment in which the first cutter is provided with a shave angle.
Moreover, what is shown to FIG. 19 (A) (B) is a front view which shows the clearance gap between a cutter and the shearing surface of roll paper as contrasted with Embodiment 1 and the form mentioned above. Among these, FIG. 19A is another embodiment 1 in which a retracting portion is provided in the first cutter. On the other hand, FIG. 19B shows the above-described embodiment in which the first cutter is provided with a shave angle.

As shown in FIGS. 18A and 18B and FIGS. 19A and 19B, in another embodiment 1 (FIGS. 18A and 19A), the first cutter 80 has a sag angle. Not provided. Therefore, the gap D1 between the first cutter 80 and the rear end shearing surface K2 of the downstream roll paper P2 is compared with the gap D2 of the above-described embodiment (FIGS. 18B and 19B). Can be small.
Here, when the first cutter 80 and the second cutter 38 shear the roll paper P, paper dust is generated at the shear point Q. And when the 1st cutter 80 and the 2nd cutter 38 advance to an advancing direction, the generated paper dust will be the clearance gaps D1, D2, between the shear plane K of the 1st cutter 80 and the 2nd cutter 38, and the roll paper P, Spreads at D3.

  At this time, if the gap D2 between the first cutter 37 and the rear end shearing surface K2 of the downstream roll paper P2 is large as in the above-described embodiment (FIG. 18B, FIG. 19B), The paper powder spreads and scatters so as to be sucked to the upstream side in the feeding direction by the gap D2. That is, since the rear side in the traveling direction of the first cutter 37 is inclined toward the upstream side in the feeding direction, the gap D2 acts so that paper dust is sucked up to the upstream side in the feeding direction. Accordingly, paper dust is scattered in a wide area A2 on the upstream side in the feeding direction from the rear end shearing surface K2 of the downstream roll paper P2.

  Then, the sheared upstream roll paper P1 with the paper powder upstream in the feeding direction from the shearing surface K adhered to the surface is once fed back upstream in the feeding direction, and then recording is performed by the recording unit. The In such a case, the ink is ejected from the paper powder, and the ink lands on the paper powder, so that there is a possibility that a portion where the ink does not land directly on the surface of the sheared upstream roll paper P1 may occur. If the paper dust on the surface of the sheared upstream roll paper P1 is further scattered from the surface, an unrecorded portion may remain white on the surface of the sheared upstream roll paper P1. So-called white spots.

  Therefore, in the other embodiment 1 (FIGS. 18A and 19A), the retracting portion 81 is provided without providing the first cutter 80 with a staking angle. Therefore, the gap D1 between the first cutter 80 and the rear end shearing surface K2 of the downstream roll paper P2 can be made smaller than the gap D2 of the above-described embodiment provided with the slant angle. As a result, the area A1 in which the paper powder spreads from the shear plane K to the upstream side in the feeding direction can be made smaller than the area A2 in the above-described embodiment in which the shear angle is provided. And the range which a white spot generate | occur | produces can be reduced. In addition, the number of locations where white spots occur can be reduced.

Further, by providing the retracting portion 81 without providing the staking angle on the first cutter 80, the load due to friction when shearing can be reduced in the same manner as when the staking angle is provided.
In addition, about the alignment range, it can be set as the structure which makes point contact with the rear-end shear surface K2 of the downstream roll paper P2 at two points, the shear point Q and the contact point S, by providing the retracting portion 81. . In such a case, since the roll paper P is not relatively high in rigidity, the rear end shearing surface K2 of the downstream side roll paper P2 can be bent at the contact point S so as to escape downstream in the feeding direction. As a result, the rear side in the traveling direction of the first cutter 80 can be inclined toward the downstream side in the feeding direction. As a result, it is possible to widen the alignment range as compared with the configuration in which the first cutter is in surface contact with the rear end shearing surface of the downstream roll paper.

Further, by providing a slant angle in the second cutter 38 and positively providing the gap D3, the paper dust generated at the shear point Q is moved so as to be sucked from the shear surface K of the roll paper P to the downstream side in the feeding direction. Can be made.
Here, the roll paper P2 on the downstream side in the feeding direction from the shear plane K has already been recorded, and the ink is fixed on the surface of the roll paper P2. That is, the ink is already dry. Therefore, even if paper dust is scattered on the surface of the roll paper P2 on the downstream side in the feeding direction from the shear plane K, there is almost no problem.
That is, by positively moving the paper dust from the shear plane K to the downstream side in the feeding direction, it is possible to reduce the possibility of the paper dust moving to the upstream side in the feeding direction. As a result, the state in which the second cutter 38 is provided with the sag angle θ2 can reduce white spots on the upstream side in the feeding direction as compared with a configuration in which the second cutter is not provided with the sag angle.

  The inkjet printer 1 which is a recording apparatus according to another embodiment 1 includes a recording execution unit 4 as a recording unit that performs recording on the roll paper P, and a downstream of the recording execution unit 4 in the feeding direction when recording the roll paper P. Provided on the side, the cutter unit 30 that moves in the width direction X of the roll paper P, the guide rail 25 as a guide part that guides the cutter unit 30, and the cutter unit 30. In the first cutter 80 as the first round blade that is not inclined and the cutter unit 30, the roll paper P is provided downstream of the first cutter 80 in the feed direction of the roll paper P and cooperates with the first cutter 80. The second cutter 38 as the second round blade to be sheared, and the first cutter 80 on the cutting edge side of the inner surface 82 which is the downstream surface in the feed direction of the first cutter 80 Provided in the circumferential direction the entire range, and a retracted portion 81 to retreat from the tip of the first cutter 80 in the feeding direction upstream side, characterized in that it comprises.

Further, in another embodiment 1, the retracting portion 81 is characterized by gradually retracting deeply from the cutting edge of the first cutter 80 toward the center side of the first cutter 80. Thereby, the 1st cutter 80 can be set as the structure which carries out point contact with the shearing surface K2 of the roll paper P2. Further, the gap D1 can be minimized.
In yet another embodiment 1, in the line direction connecting the center of the first cutter 80 and the center of the second cutter 38, the retracting portion 81 rolls in a region E where the first cutter 80 overlaps the second cutter 38. It is provided in the area | region which considered the thickness of the paper P, It is characterized by the above-mentioned.

Further, in another embodiment 1, the first cutter 80 is provided on the front side of the roll paper P, and the second cutter 38 is provided on the back side.
Furthermore, in another embodiment 1, the posture of the second cutter 38 is such that the front side in the traveling direction of the cutter unit 30 when shearing the roll paper P with respect to the width direction X in which the cutter unit 30 moves is the first cutter. It is inclined in the direction approaching 80.

[Other embodiment 2]
FIG. 20 is an enlarged plan view showing a cutting edge of a cutter according to another embodiment 2.
As shown in FIG. 20, the ground 91 of the cutting edge of the first cutter 90 according to another embodiment 2 is formed to be inclined with respect to the radial direction H <b> 1 with respect to the rotation fulcrum of the first cutter 90. Similarly, the polishing marks 94 at the cutting edge of the second cutter 93 are formed to be inclined with respect to the radial direction H2 with respect to the rotation fulcrum of the second cutter 93. Specifically, at the shear point Q for shearing the roll paper P, which is the leading end in the traveling direction when shearing in a range where the first round blade and the second round blade overlap, the polishing marks 91 of the first cutter 90 and the second It is comprised so that the grinding | polishing eyes 94 of the cutter 93 may oppose.
Since other members are the same as those in the above-described embodiment, the same reference numerals are used and description thereof is omitted.

Therefore, the direction of the tip of the uneven projection 92 of the saw-toothed portion 61 of the first cutter 90 can be made substantially perpendicular to the roll paper P at the shear point Q. Similarly, the direction of the tip of the uneven projection 95 of the saw-toothed portion 61 of the second cutter 93 can be made substantially perpendicular to the roll paper P at the shear point Q.
As a result, when the roll paper P is sheared, the convex portions 92 and 95 of the saw-like portion 61 can bite the roll paper P more reliably. This is particularly effective when the roll paper P has a high rigidity, or in the case of so-called cross media, which is a relatively hard sheet-like cloth.

  In another embodiment 2, the uneven polishing marks 91, 94 extending on the first inclined surface of the cutting edge of the first cutter 90 and the second inclined surface of the cutting edge of the second cutter 93 are formed on the first cutter 90 and the first cutter 90. At the shear point Q for shearing the roll paper P, which is the leading end in the traveling direction when shearing in the range E where the two cutters 93 overlap, the direction of the polishing marks 91 of the first cutter 90 and the polishing marks 94 of the second cutter 93 face each other. As described above, it is characterized in that it is provided in a direction inclined with respect to the radial directions H1 and H2 with respect to the rotation fulcrum of the round blade.

That is, the polishing eye 91 of the first cutter 90 is inclined with respect to the radial direction H1 of the first cutter 90. Similarly, the polishing marks 94 of the second cutter 93 are inclined with respect to the radial direction H2 of the second cutter 93. Furthermore, at the shear point Q, the direction of the polishing marks 91 of the first cutter 90 and the direction of the polishing marks 94 of the second cutter 93 are configured to face each other.
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

1 is an external perspective view of a printer according to the present invention. 1 is a schematic side view showing a printer main body according to the present invention. The schematic perspective view which shows the cutting part which concerns on this invention. The schematic side view which shows the cutting part which concerns on this invention. The rear perspective view which shows the guide rail of the cutting part which concerns on this invention. The perspective view which shows a mode that the cutting part which concerns on this invention is shearing roll paper. (A) and (B) are views showing a cutter carriage according to the present invention. (A) and (B) are views showing a cutter carriage according to the present invention. The figure which shows the power transmission to the cutter of the cutter unit which concerns on this invention. (A) (B) is a figure which shows the positional relationship of a cutter. (A) (B) is schematic which shows a mode when the cutter which concerns on this invention shears roll paper. (A) (B) is a figure which shows the blade edge | tip of the cutter which concerns on this invention. The enlarged plan view which shows the blade edge | tip of the cutter which concerns on this invention. The figure which shows a mode that the blade edge | tip of the cutter which concerns on this invention is grind | polished. The figure which shows the mode of the deburring of the blade edge | tip of the cutter which concerns on this invention. (A)-(C) are schematic which shows the mode of the alignment of the cutter of this invention. (A) (B) is a figure which shows the cutter which concerns on other Embodiment 1. FIG. (A) (B) is a plane sectional view showing the crevice between a cutter and the shearing surface of roll paper in contrast with other embodiments 1 and the form mentioned above. (A) (B) is a front view which shows the clearance gap between a cutter and the shearing surface of roll paper in contrast with the embodiment 1 and the form mentioned above. The enlarged plan view which shows the blade edge | tip of the cutter which concerns on other Embodiment 2. FIG. (A)-(C) are figures which show the cutter of a prior art.

Explanation of symbols

1 inkjet printer, 2 main body, 3 roll paper supply unit, 4 recording execution unit,
5 Discharge receiving portion, 6 (roll paper) discharge port, 7 opening, 8 struts, 9 base,
10 (roll paper) stacker, 11 platen, 12 recording head,
13 air suction means, 14 suction holes, 15 suction pipes, 16 suction fans, 20 cutting parts,
21 base part, 22 motor for cutter, 23 endless belt, 23a upper belt,
23b Lower belt, 24 driven pulley, 25 guide rail,
30 cutter unit, 31 slider section, 32 cutter carriage,
33 1st guide surface part, 34 2nd guide surface part, 35 1st inclination part, 36 2nd inclination part,
37 1st cutter, 37a 1st inclined surface, 38 2nd cutter, 38a 2nd inclined surface,
39 first pre-shear guide section, 40 second pre-shear guide section, 41 power transmission shaft,
42 1st gear, 43 2nd gear, 44 3rd gear, 45 2nd bevel gear,
46 1st slider pulley, 47 2nd slider pulley, 48 4th gear,
49 compound gear, 49a fifth gear, 49b first bevel gear,
50 upstream auxiliary roller holder, 51 upstream auxiliary roller,
52 downstream auxiliary roller holder, 53 downstream auxiliary roller, 60 polishing eyes,
61 saw-shaped part, 61a convex part, 70 power transmission means, 71 1st grindstone,
72 2nd whetstone, 80 1st cutter (of other Embodiment 1) 81 Retraction part,
82 inner surface, 90 first cutter (of other embodiment 2),
91 (first cutter) polishing eye, 92 (first cutter) convex portion,
93 Second cutter, 94 (second cutter) polishing eye, 95 (second cutter) convex portion,
100 (prior art) round blade, 101 cutting edge, 102 abrasive eyes,
A1, A2 Paper dust scattering area, D1-D3 gap, E overlapping area,
H1 radial direction, H2 radial direction, K shearing surface, K1 upstream shearing surface of the roll paper,
K2 rear end shearing surface of downstream roll paper, P roll paper, P1 sheared upstream roll paper,
P2 sheared downstream roll paper, Q shear point, R roll, S contact point, X width direction,
Y Feed direction

Claims (5)

A cutter unit that moves in the width direction of the recording medium to be sent;
A guide portion for guiding the cutter unit;
A round blade provided on the cutter unit, for cutting a recording medium,
The surface forming the cutting edge of the round blade has unevenness extending in a direction intersecting the circumferential direction of the round blade,
The cutter unit is
As the round blade, a first round blade provided on one side of the recording medium;
As the round blade, having a second round blade provided on the other surface side opposite to the one surface,
The first round blade and the second round blade cooperate to shear the recording medium,
The unevenness extending on the surface of the cutting edge of the first round blade and the surface of the cutting edge of the second round blade is:
At the shearing point for shearing the recording medium, which is the leading end in the traveling direction when shearing in the range where the first and second round blades overlap, the tip of each of the extended concavo-convex portions with respect to the recording medium To face each other vertically ,
In the range where the first round blade and the second round blade overlap each other, the outer side of the round blade is positioned on the rear side in the traveling direction with respect to the radial direction based on the rotation fulcrum of the round blade, respectively . A recording apparatus in which the extending direction of the unevenness is inclined . The recording apparatus according to claim 1,
A recording apparatus having a surface roughness range of 3.2 to 12.5 S created by the unevenness. The recording apparatus according to claim 1 or 2,
The unevenness is formed by polishing, and when the round blade is polished in the intersecting direction, the round blade is rotated in the circumferential direction, and the deburring of the blade edge is performed while leaving the polishing eyes in the intersecting direction. A recording apparatus characterized by the above.   4. The recording apparatus according to claim 1, wherein the first round blade is driven by movement of the cutter unit. 5. 5. The recording apparatus according to claim 1, further comprising a recording unit that performs recording on the recording medium upstream of the cutter unit in the feeding direction of the recording medium.
The first round blade is provided on the surface side of the recording medium,
The recording apparatus provided on the back surface side of the second round blade and downstream of the first round blade in the feeding direction of the recording medium.

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