JP2004090131A - Sheet cutting device and recording device - Google Patents

Abstract

An object of the present invention is to reduce the size of a recording apparatus as a whole while preventing displacement in the width direction when cutting a sheet.
In a sheet cutting apparatus for cutting a sheet by moving a moving unit holding a cutting unit from a standby position in a sheet width direction, a sheet guiding unit for guiding the sheet to a cutting position by the cutting unit; Moveable between a first position where the sheet is sandwiched and held between the sheet guide means and the sheet guide means on the upstream side of the cutting means and a second position where the sheet can be separated from the sheet and conveyed. And a lifting means for moving the pressing means along a predetermined trajectory between the first position and the second position in accordance with the position of the moving means.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sheet cutting apparatus for automatically cutting a sheet and a recording apparatus having the sheet cutting apparatus.
[0002]
[Prior art]
2. Description of the Related Art Many image forming apparatuses using a sheet wound in a roll form have a cutting device for cutting a sheet after recording at an appropriate position. In many cases, the cutting device in this case is a mechanism that combines a movable blade and a movable blade in the form of a straight plate having a length that covers the entire width of the sheet.
[0003]
[Problems to be solved by the invention]
However, in the cutting device having such a configuration, it is difficult to reduce the size of the device because the movable region of the movable blade having a linear plate shape must be secured, and a large-scale driving device is required for driving the device. There is a problem that the sheet is shifted in the width direction at the time of cutting.
[0004]
Further, in recent years, a cutting device of a mechanism for moving a disk-shaped cutting blade from a standby position in a width direction of a sheet to perform cutting has been attracting attention from the viewpoint of achieving a reduction in size and weight, and moving such a disk-shaped cutting blade. There is a technique disclosed in Japanese Patent Application Laid-Open No. 11-262893 as a technique for cutting by cutting. As shown in FIG. 5, in this technique, when the holder 110 holding the cutting blade performs a non-cutting operation near the standby position, the sheet pressing member 111 separates from the guide member 112 and moves the sheet conveying path 113. And the sheet 100 can be conveyed.
[0005]
On the other hand, when the holder 110 starts the cutting operation and moves from the vicinity of the standby position, the sheet pressing member 111 is displaced so as to contact the guide member 112 so that the sheet 110 is pressed on the guide member 112. It is configured. Accordingly, even if the cutting blades 114 and 115 cut the sheet 100 while moving in the sheet width direction, since the sheet 100 is held and the movement thereof is regulated, it is possible to solve the problem due to the lifting or displacement of the sheet 100. I have.
[0006]
However, in the case of such a cutting apparatus, as is apparent from FIG. 5, since the sheet pressing member 111 is configured to rotate around a shaft 111a parallel to the sheet surface, the mechanism is moved forward and backward in the sheet conveying direction. There is a problem in that it has to be unfolded, and the cutting device itself becomes longer in the transport direction, which is disadvantageous for downsizing the entire recording device.
[0007]
Accordingly, an object of the present invention is to reduce the size of the entire recording apparatus while preventing a shift in the width direction when cutting a sheet.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a typical configuration of the present invention is a sheet cutting apparatus that cuts a sheet by moving a moving unit holding a cutting unit from a standby position in a sheet width direction, Means for guiding the sheet to a cutting position by means, and a first position for holding the sheet sandwiched between the sheet guiding means and the sheet upstream of the cutting means, and separating from the sheet to remove the sheet. Holding means movable between a second position capable of being transported, and moving the holding means along a predetermined trajectory between the first position and the second position in accordance with the position of the moving means And elevating means for performing the operation.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described. In the description, the configurations of the respective units of the sheet cutting device and the recording device will be briefly described, and then specific description will be made with reference to the drawings. The present embodiment is an example in which the sheet cutting device of the present invention is applied to a cutting mechanism device such as a recording device using continuous paper.
[0010]
(Sheet cutting device)
A sheet cutting device according to the present invention is for automatically cutting a sheet at a predetermined position, and includes a cutting unit for cutting the sheet, a moving unit for movably holding the cutting unit, and a side facing the cutting unit. Guide means for holding a sheet in cooperation with a pressing means described later, a driving means for driving a moving means, and a first means for pressing and holding the sheet against the sheet guiding means when cutting the sheet. Pressing means configured to be movable between a position and a second position where the pressing is released when the sheet is conveyed and the other side of the conveying path is formed, and the pressing means is moved to the first position in accordance with the movement of the moving means. , A sheet guide unit, a driving unit, and a holding unit that holds, fixes, or rotatably supports a lifting unit that moves between a predetermined locus and a second path.
[0011]
The cutting is performed by moving the moving unit holding the cutting unit in the direction orthogonal to the sheet conveying direction by the driving unit, and cutting the sheet by sandwiching the sheet between the sheet guiding unit and the sheet guiding unit disposed opposite to each other across the conveying path. . Further, at the time of cutting, the sheet is held by being pressed by a sheet guiding means and a pressing means which form one of the conveying paths.
[0012]
The cutting means is a first cutting edge held by the moving means, and is configured to cut the sheet therebetween in cooperation with a second cutting edge on the side facing the conveyance path. The first cutting blade is, for example, a double blade capable of cutting a sheet in both reciprocating directions, a rotary blade rotatably supported by a moving unit, and the like. The second cutting edge, which is opposite to the first cutting edge across the conveyance path, cuts the sheet on the conveyance surface of the sheet guiding means in cooperation with the first cutting edge. The first cutting edge and the second cutting edge are at least in contact with or overlap with each other. The second cutting edge is, for example, a rotary blade held by the moving means and movable with the first cutting edge, a double blade capable of cutting in both reciprocating directions, or a linear fixed blade formed on the sheet guide means side. .
[0013]
The moving unit holds the cutting unit, and is configured to be reciprocally driven by the driving unit on a track regulated by a guide shape formed on the holding unit and the like. The moving means also has an engaging portion which is partially engaged with the elevating means in the vicinity of the reciprocating ends of the track. The moving means is, for example, a movable holder-like member called a carriage, and the engaging portion is formed, for example, as a cam for operating the elevating means.
[0014]
The sheet guiding means cooperates with the holding means to hold and hold the sheet at the first position of the holding means, and forms a transport path on the side facing the cutting means at the second position of the holding means. It is configured to guide sheet conveyance. If the conveying path formed by the sheet guide means has substantially the same height as the conveying path facing the recording head in a recording unit such as an ink jet printer, it is more suitable for a cutting device applied to an ink jet printer or the like. The sheet guiding means may also be configured to form a linear fixed blade as a second cutting edge cooperating with the first cutting edge of the cutting means.
[0015]
The driving unit is configured to move the moving unit along the guide shape of the moving unit, for example, a belt wound around a pair of pulleys on the outer periphery of the conveying path in a direction perpendicular to the conveying direction, one pulley , A predetermined gear train for driving the motor, a motor for driving the gear train, and a motor capable of normal rotation and reverse rotation. These are fixed to holding means described later. Note that the driving unit is not limited to the configuration described in the above-described example, and may have another configuration as long as the moving unit can reciprocate in the cutting direction. That is, the moving means may include a driving means, and the moving means may travel along the guide shape by itself. Further, the driving means may be a linear motor to drive the moving means.
[0016]
The holding means is formed in a longitudinal direction in the moving direction of the cutting means, and has a first position for holding the sheet between the sheet guide means facing when cutting the sheet, and a second position for releasing the holding when conveying the sheet. It is configured to be movable between. Further, the holding means is configured to cooperate with the elevating means to be described later to release the sheet from being held near the two standby positions in accordance with the movement of the moving means, and the moving means is moved away from the vicinity of both the standby positions. During the cutting operation, the sheet is moved to a first position for holding the sheet.
[0017]
More specifically, the holding means is supported at both ends in the longitudinal direction by a pair of elevating cams of the elevating means, which will be described later. The lifting means engages with the other lifting cam by engaging with the lifting cam, and the pressing means supported by the lifting cams at both ends moves between the first position and the second position along a predetermined trajectory. It is configured to be movable.
[0018]
The pressing means has a high friction elastic portion on the pressing surface. The high friction elastic portion is formed of, for example, rubber or the like. The elastic portion may be an elastic body such as a thin metal plate provided with a high friction coating. The holding means is urged toward the first position to hold the sheet when the moving means and the elevating cam are not engaged. For example, a spring or the like that urges the pressing means with an elastic force is used.
[0019]
The elevating means is a link mechanism including at least a pair of elevating cams. The pair of elevating cams are respectively arranged near the standby position of the moving means, and support the pressing means at both ends (one is a long hole loose fit, the other is a round hole configuration). The elevating cam is also supported to be rotatable or movable on a predetermined trajectory with respect to the holding means. One elevating cam is configured to be able to interlock with the other elevating cam by a link mechanism described later. That is, when one of the elevating cams and the moving means are engaged with the moving means to move the supporting portion at one end of the pressing means from the first position to the second position against the urging force. Then, the movement is transmitted to the other elevating cam by the link mechanism, and the other elevating cam also moves the supporting portion at the other end of the pressing means from the first position to the second position against the urging force. This link mechanism will be described later.
[0020]
The holding means is configured to hold, fix, or move or rotate the respective means described above.
[0021]
(Recording device)
A recording apparatus according to the present invention includes a recording unit that performs recording on a sheet, a sheet cutting device that cuts a sheet on which recording is performed, a control unit that controls the recording unit, and the sheet cutting device, and the like. .
[0022]
The recording means performs recording by discharging ink on a sheet conveyed on a platen surface facing the recording means. In the recording means, the ink is ejected by energizing the electrothermal converter in accordance with a recording signal and utilizing the film boiling caused by the thermal energy to grow and shrink the bubbles generated in the ink. And printing is performed. This method can be applied to both the so-called on-demand type and the continuous type. In particular, in the case of the on-demand type, the system is arranged corresponding to a sheet or a liquid path holding a liquid (ink). By applying at least one drive signal corresponding to the recording information and providing a rapid temperature rise exceeding nucleate boiling to the electrothermal transducer, heat energy is generated in the electrothermal transducer, and the recording head is driven. This is effective because film boiling occurs on the heat acting surface, and as a result, bubbles in the liquid corresponding to this drive signal one-to-one can be formed. The liquid is ejected through the ejection opening by the growth and contraction of the bubble to form at least one droplet. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that particularly excellent liquid ejection can be achieved, which is more preferable.
[0023]
The control means controls the recording means and the sheet cutting device, and includes a microcomputer and a ROM for storing firmware for controlling the operation.
[0024]
(Specific embodiment)
Next, an embodiment of a sheet cutting device according to the present invention will be described in detail with reference to FIGS. FIG. 1 is an overall schematic diagram of a recording apparatus. 2 and 3, a description will be given assuming that a pressing unit 50 described below is in a first position where the sheet 100 is held therebetween, and in FIG. 4, the pressing unit 50 is lifted and can be transported.
[0025]
As shown in FIG. 1, the sheet cutting apparatus according to the present invention is for automatically cutting a sheet 100 at a predetermined position on the front surface of the apparatus. The sheet cutting device includes a cutter 10 as a cutting unit for cutting the sheet 100, a carriage unit 20 as a moving unit that holds the cutter 10 and is guided and movable in a rail-like guide shape (not shown). A conveyance path on the recording back side is formed, and the sheet 100 is sandwiched and held at the first position of the holding section 50 in cooperation with the holding section 50, and the sheet 100 is overlapped with a rotary blade 12 of the cutter 10, which will be described later. It has a guide unit 30 as a sheet guide unit on which a fixed blade 31 that can be cut is formed, and a drive unit 40 as a drive unit that drives the carriage unit 20 in both reciprocating directions.
[0026]
Further, the sheet cutting apparatus is configured to be movable between a first position for holding and holding the sheet 100 when the sheet 100 is cut and a second position for releasing the hold when the sheet 100 is conveyed, on the back of the apparatus. By the engagement of the pressing part 50 as the pressing means and the one elevating cam near one of the standby positions of the moving means, the pressing part 50 is moved from the first position against the urging force of the urging means such as a spring. A lifting unit 60 (see FIG. 2) as lifting means for lifting to a second position;
[0027]
The sheet cutting unit has a guide shape for guiding the carriage unit 20, and has a guide unit 30, a driving unit 40, and a base unit 70 as a holding unit that holds, rotates, or moves and supports the elevating unit 60. .
[0028]
The recording apparatus has a sheet installation section (not shown) for installing the sheet 100 and a recording head 80 as recording means, and the sheet cutting apparatus is configured to be detachable.
[0029]
The cutter 10 is configured to cut the sheet 100 on which processing such as recording has been performed on the upstream side in the transport direction. Specifically, it is a disk-shaped rotary blade 12 that is rotatably supported by the carriage unit 20 at the rotation axis center 11 of the rotation axis of the cutter 10. The rotary blade 12 is urged by a pressing member such as a compression spring (not shown) in the direction of the rotation shaft center 11 and in a direction in which it contacts a fixed blade 31 described later. As a result, as the carriage 20 moves linearly guided by the guide shape in the width direction A of the sheet 100, the rotary blade 12 is pinched between the rotary blade 12 and the fixed blade 31 while rotating. The sheet 100 is configured to be cut. The rotation of the rotary blade 12 may be so-called co-rotating rotation, for example, by frictional contact with the fixed blade 31 on the side surface, or between a rack formed on the base 70 or the like in the guide direction of the carriage unit 20 and the carriage unit 20 side. The gear may be driven to rotate by a gear meshing with the rack. In addition, the rotary blade 12 is not limited to a rotating blade, and may be a double blade having a blade capable of cutting in both reciprocating directions.
[0030]
The carriage portion 20 has a groove shape (not shown) corresponding to a guide shape (not shown) formed on the base portion 70 and the like, and is guided by the guide shape and the groove shape so as to be movable in the cutting direction A. . Further, the carriage unit 20 rotatably holds the rotary shaft center 11 of the rotary blade 12 by pivotally supporting the same. Further, a timing belt 41 of a driving unit 40 described later is locked by a locking unit of the carriage unit 20. As a result, when the timing belt 41 is driven in one direction by the drive unit 40, the carriage unit 20 is guided by the guide shape of the base unit 70 and the groove shape of the carriage unit 20, and moves in the direction corresponding to the drive direction. Is possible. Further, an engagement portion is provided with the lifting cams 61a and 61b at both ends, which will be described later, and by engaging with one of the lifting and lowering cams near the standby position with the movement of the carriage portion 20, the shaft 73a of the base portion 70 is provided. , 73b are configured to rotate the elevating cams 61a, 61b rotatably supported by each of them.
[0031]
In the present embodiment, the guide portion 30 forms a conveyance path on the recording back side of the sheet 100, that is, the lower side of the sheet 100, and is substantially similar to the platen surface of the recording section on the conveyance upstream side (not shown). And height. In addition, the guide portion 30 has a pressing surface 30a for pressing the sheet in cooperation with the pressing surface of the pressing portion 50 at a first position of the pressing portion 50 described later. Further, a fixed blade 31 for cutting the sheet 100 sandwiched between the rotating blades 12 of the cutter 10 while cooperating with the rotating blades 12 of the cutter 10 is provided on the downstream side from the entrance side of the sheet 100 in the moving direction of the carriage unit. It is extended corresponding to the moving range of the rotary blade 12.
[0032]
The drive unit 40 is configured to drive the carriage unit 20 reciprocally in the cutting direction A of the sheet 100 based on a command from a control unit (not shown). Specifically, a motor 42 driven based on a command from control means (not shown), a pinion gear 43 fixed to the motor shaft 42a and transmitting the rotation of the motor shaft 42a to the reduction gear 44 by meshing motion, A reduction gear 44 for reducing the rotation from the pinion gear 43 and transmitting the reduced rotation to the drive pulley 45; a drive pulley 45 driven by meshing with the reduction gear 44; A loop-shaped timing belt 41 that is wound around and driven, and the carriage portion 20 is locked on a part thereof, and tension is applied to the timing belt 41 to position the sheet pulley 45 opposite to the driving pulley 45 in the width direction. The idler pulley 46 is rotatably supported by the shaft and the carriage unit 20 detects that the carriage unit 20 has reached near the standby position of the carriage unit 20. Sensor 47a disposed at both end portions, is formed by 47b or the like.
[0033]
The motor 42 is, for example, a DC motor supplied with a current from a power supply unit (not shown), and is fixed to the base unit 70. The motor 42 is capable of rotating forward and backward depending on whether the current is positive or negative. The forward rotation and the reverse rotation are controlled by a signal from control means (not shown). Further, the motor 42 is controlled so that the brake by the back electromotive force can be applied.
[0034]
The pinion gear 43 is, for example, a spur gear made of metal, and is fixed with sufficient slip strength and pull-out strength so that no slip occurs between the motor shaft 42a and the inner diameter of the pinion gear 43 when the carriage unit 20 is driven. As the fixing method, press-fitting, bonding, or the like can be considered. The rotation of the pinion gear 43 is reduced by the reduction gear 44 to drive the drive pulley 45.
[0035]
The drive pulley 45 is rotatably supported by a shaft 71 a fixed to the base 70, and includes a driven gear 45 a driven by the reduction gear 44 and a winding part 45 b around which the timing belt 41 is wound. In addition, for example, it is an integrally molded resin part. The winding portion 45b has a tooth profile corresponding to the tooth profile of the timing belt 41, is slightly wider than the width of the timing belt 41 and has a flange shape on both outer sides, and does not slip while preventing skew of the timing belt 41 and the like. The carriage can be driven. The position of the shaft 71b of the idler pulley 46 on the side opposite to the width direction of the sheet 100 with respect to the driving pulley 45 is adjustable, and is fixed at a position where appropriate tension is applied to the timing belt 41.
[0036]
Like the drive pulley 45, the idler pulley 46 has a flange shape on both outer sides of the winding portion 46b to prevent the timing belt 41 from skewing. Further, similarly to the drive pulley 45, a tooth shape corresponding to the tooth shape of the timing belt 41 is formed. Thus, the timing belt 41 is driven without slipping on the driving pulley 45 and the winding portions 45b, 46b of the idler pulley 46.
[0037]
In the above description, the position of the idler pulley 46 on the side opposite to the drive side can be adjusted. However, the idler pulley 46 is fixed to the base 70, and the gear train from the motor 42 to the drive pulley 45 is A configuration may be adopted in which the bracket is held by a bracket separate from the portion 70 and the bracket is fixed to the base portion 70 so as to be position adjustable.
[0038]
The timing belt 41 is wound around a drive pulley 45 and an idler pulley 46, and an appropriate tension is obtained by the above-described shaft position adjusting function. Further, the timing belt 41 is driven to rotate in a plane perpendicular to the conveying surface and the conveying direction F of the sheet 100. Since the above-mentioned carriage section 20 is locked at a part thereof, the carriage section 20 can be moved by being driven by the drive pulley 45.
[0039]
The sensors 47a and 47b are configured to detect that the carriage unit 20 has reached the end of the movement range. For example, a switch or the like that detects that the actuators 47a1 and 47b1 are depressed by a part of the carriage unit 20 when the carriage unit 20 reaches the vicinity of the standby position is used. When the sensors 47a and 47b detect that the carriage unit 20 has arrived near the standby position, the driving of the motor 42 is stopped or brake-controlled by a control unit (not shown) to prevent the carriage unit 20 from going too far. The stop position of the section 20 is controlled, and thus the mechanism section is prevented from being damaged.
[0040]
The positions at which the sensors 47a and 47b are mounted can be adjusted in the moving direction of the carriage 20, so that the detection timing can be adjusted to an appropriate detection timing according to the load difference when the carriage 20 is driven. Further, the positions of the sensors 47a and 47b are set substantially before the standby position of the carriage unit 20, and after a predetermined timing (the timing can be set by the control means) after the arrival is detected, the driving is stopped or a brake is applied. By performing the control, the stop position of the carriage unit 20 may be controlled by changing the parameter of the control unit without changing the mechanism unit.
[0041]
Stopper shapes 72a and 72b are formed on the base portion 70 at both ends of movement of the carriage portion 20. When the carriage portion 20 has passed the standby position due to malfunction or the like, the stopper shapes 72a and 72b are formed. It stops when the carriage comes into contact, and prevents the mechanism from being damaged. Further, by attaching a cushioning member to the stopper shape 72a, 72b abutting surface with the carriage, it is more preferable from the viewpoint of the cushioning effect, noise and the like. Examples of the cushioning member include urethane sponge, rubber, and spring. Note that the buffer member may be used as a brake when the carriage unit 20 stops.
[0042]
When the sheet 100 is cut by the above-described cutter 10, the holding portion 50 is configured to have a first position where the sheet 100 is fixed and held, and a second position where the holding of the sheet 100 is released and the sheet 100 can be conveyed. It is configured to be able to move between the spaces by the action of a lifting unit 60 described later, while maintaining a substantially parallel to the recording surface along a locus substantially perpendicular to the sheet conveying direction.
[0043]
Specifically, a pressing elastic member which is disposed on the recording surface P on the upstream side of the conveyance of the sheet 100 from the cutter 10 and forms one of the conveyance paths, that is, the conveyance path on the recording surface P side in the opening shape formed in the base portion 70. A holding plate 51 for fixing the holding plate 52, a holding elastic member 52 fixed to the holding plate 51 and in contact with the recording surface P of the sheet 100, and spring hooking shapes 51 c and 51 d near both ends of the holding plate 51, and springs for the base 70. The tension springs 53a and 53b are suspended by the hanging shapes 70a and 70b, and always bias the pressing elastic member 52 toward the recording surface P of the sheet 100.
[0044]
The holding plate 51 is a highly rigid member that holds the sheet 100 by sandwiching the sheet 100 between the holding plate 51 and the guide portion 30 facing the holding plate 51. For example, the holding plate 51 may be formed by bending a metal plate. In addition, in the holding plate 51, at least one of the shafts 51 a, 51 b protrudingly provided at both ends in the longitudinal direction is supported by bearings 61 a 1, 61 b 1 of lifting cams 61 a, 61 b to be described later with at least one of them being slightly loose. ing. For example, one side supports the holding plate with one degree of freedom by fitting the round hole and the round shaft, and the other side has two degrees of freedom by fitting the long hole and the round shaft in the same direction as the cutting direction A. Is supported.
[0045]
The pressing elastic member 52 is fixed to the pressing plate 51, and is configured to press and hold the sheet 100 against the guide portion 30 from the recording surface P side at the first position of the pressing plate 51. The pressing elastic member 52 has an uneven shape in the cutting direction A of the sheet 100, and at least an edge in a width direction of a sheet of all sizes applied in the present embodiment (hereinafter, referred to as a side edge). ) Is formed at a position where the convex shape is pressed. Thus, the sheet 100 can be prevented from being displaced in the width direction due to the rush pressure of the cutter 10 at the moment when the rotary blade 12 rushes into the side edge during cutting. In addition, it is possible to prevent the pressing pressure from becoming non-uniform in the width direction as compared with a case where there is no uneven shape, that is, as compared with a pressing surface having a substantially flat surface. In addition, a configuration may be employed in which the shape of the pressing elastic member 52 gradually rises toward the center of the pressing surface, that is, a so-called crown is provided to positively correct the uneven distribution of the pressing pressure.
[0046]
In addition, for example, when the cutting device of the present embodiment is applied to an ink jet printer, the recording surface P side of the sheet 100 is wet with the ink, and therefore, directly pressing the recording surface P may stain the recording surface. Absent. Therefore, in the present embodiment, the contact surface of the pressing elastic member 52 with the sheet 100 has high water repellency. Thereby, when the sheet 100 whose surface is wet is pressed, the recording surface of the sheet is not stained. High water repellency is realized by, for example, a fluorine resin coat or the like. Further, by attaching an absorbent or the like to a position of the holding elastic member 52 that does not touch the recording surface slightly away from the recording surface P of the sheet 100, the ink once water-repellent on the holding surface is absorbed, and recording is performed using the attached ink. It is also possible to prevent the surface from being stained.
[0047]
Further, for example, when the uneven shape of the elastic member 52 is a sharp spike shape, or when the area of the convex portion is extremely small with respect to the pressing force and the pressure at the time of pressing is high, for example, a high image quality that satisfies the photographic quality The surface of quality paper may be scratched or indented. Therefore, in the present embodiment, the pressing elastic member 52 is made of a material such as rubber, for example, and has a block-like convex shape having a relatively large area with respect to the pressing force. The pressing pressure is, for example, about 0.003 Pa, and the area of the block-shaped convex shape is, for example, about 30 mm per piece. ² It is about. Thus, care is taken to prevent indentations, scratches, and the like from being made on a sheet of high-quality paper or the like.
[0048]
The tension springs 53a, 53b are hooked on spring hooked shapes 51c, 51d protruding from both ends of the holding plate 51 and spring hooked shapes 70a, 70b of the base 70, and hold the holding plate 51 from the second position. 1, that is, in such a manner that the sheet 100 is always urged in the direction of pressing the sheet 100. In the present embodiment, the tension springs 53a and 53b are used, but any other configuration may be used as long as the pressing plate 51 can always be biased from the second position to the first position. Absent. That is, a configuration may be employed in which a compression spring is used to urge the recording surface P side from the opposite side to the present embodiment.
[0049]
The elevating unit 60 shown in FIG. 2 has a first position for pressing the sheet 100 while keeping the pressing unit 50 parallel to the sheet surface and a second position for releasing the pressing of the sheet 100 in accordance with the movement of the carriage unit 20. Is moved along a predetermined trajectory. The predetermined trajectory is, for example, a trajectory in which the pressing unit 50 moves substantially perpendicularly while keeping parallel to the sheet surface.
[0050]
That is, the lifting / lowering portion 60 supports the shafts 51a and 51b at both ends of the holding plate 51, and the lifting / lowering cams 61a and 61b rotatably supported by the shafts 73a and 73b projecting from the base 70. Rod-shaped connecting rods 62a and 62b rotatably supported by the elevating cams 61a and 61b respectively with the protruded shafts 62a1 and 62b1, and a shaft 76a rotatably supported by a shaft 76a protruded from the base 70. A link disk 63 that rotatably supports and connects shafts 62a2 and 62b2 protrudingly provided at the other ends of the connecting rods 62a and 62b at the connection portions 63a and 63b opposed to each other with the center as the center of each link node. It constitutes the link mechanism of the section.
[0051]
The elevating cams 61a and 61b are rotatably supported by shafts 73a and 73b protruding from the base 70 outside the movable range of the carriage 20 near the standby position of the carriage 20. Further, it has an engagement portion that engages with the carriage portion 20 and is configured to rotate by a cam action between the carriage and the engagement portion. The engaging portions of the lifting / lowering cams 61a and 61b may be constituted by, for example, rollers that can rotate at the engaging portions of the carriage portion 20, so that the load at the time of engagement may be reduced.
[0052]
The elevating cams 61a and 61b rotatably support shafts 51a and 51b projecting from both ends of the holding portion 50 by bearings 61a1 and 61b1. The shafts 73a and 73b and the bearings 61a1 and 61b1 are arranged at a first position of the holding unit 50 in substantially the same plane parallel to the seat surface. Thus, the component in the width direction A of the sheet 100 is not included in the movement component of the pressing unit 50 at the moment when the sheet 100 is pressed and the moment when the sheet 100 is released due to the planar motion of the link mechanism described above. That is, since the pressing portion 50 moves up and down substantially vertically near the sheet surface, the sheet 100 is prevented from being displaced in the width direction A. In other words, the pressing portion 50 presses the sheet 100 from directly above and separates right above.
[0053]
Here, the bearing portion 61b1 is a round hole, and the shaft 51b of the holding plate 51 is a round shaft, and is capable of rotating with one degree of freedom. The bearing portion 61a1 is a long hole extending in substantially the same direction as the longitudinal direction of the holding portion 50, and the shaft 51a of the holding plate 51 is a round shaft, and can perform two-degree-of-freedom plane movement of parallel movement and rotation. Since one of the bearing portions 61a1 is formed as an elongated hole, a so-called relief is provided at each link node constituting the link structure so that an unreasonable force due to component accuracy or the like is not applied.
[0054]
The bearings 61a2, 61b2 of the shafts 62a2, 62b2 protruding from one ends of the connecting rods 62a, 62b of the elevating cams 61a, 61b are elongated holes extending in substantially the same direction as the longitudinal direction of the connecting rods 62a, 62b. I have. Thus, both the bearing portions 61a2 and 61b2 are elongated holes. This is because when the holding portion 50 is at the first position, the sheet 100 is held down by the force of only the tension springs 53a and 53b without being affected by the dimensional accuracy and the like of the components of each link node constituting the link mechanism described above. It is a so-called escape provided to be able to do.
[0055]
On the other hand, when the holding section 50 is raised to the second position by the engagement between the carriage section 20 and the lifting / lowering cams 61a and 61b, the holding section 50 functions as a link mechanism and moves the holding section 50 as described above. More specifically, the carriage mechanism 20 is engaged with one of the elevating cams in the vicinity of one of the standby positions by the link mechanism, and the shaft, which is the support portion of one end of the holding plate 51, is moved from the first position to the tension spring 53a. , 53b against the urging force, the other lifting cam moves the supporting portion at the other end of the pressing portion 50 to the first position by the action of the connecting rods 62a, 62b and the link disk 63. From the tension springs 53a, 53b to move to the second position. In other words, the link mechanism acts on only one of the engagement between the elevating cam and the carriage, and the pressing unit 50 operates in a substantially vertical direction while keeping the pressing unit 50 parallel to the sheet surface. Accordingly, the pressing unit 50 can perform the contacting / separating operation in the order of the second position, the first position, and the second position in both the reciprocating directions of the carriage unit 20. Therefore, when the cutter 10 moves, the sheet 100 can be cut by pressing the sheet 100 in both the reciprocating directions.
[0056]
The base section 70 has a guide shape (not shown) for guiding the movement of the carriage section 20 and supports the guide section 30, the drive section 40, the elevating section 60, and the like so as to hold, rotate, or move. The base portion 70 has a plate shape substantially parallel to a surface orthogonal to the sheet surface in the cutting direction A, and has an opening shape including a transport path formed by the guide portion 30 and the pressing portion 50. The base 70 is made of, for example, a metal plate. The base portion 70 has a shaft shape that rotatably supports the driving pulley 45, the idler pulley 46, the lifting / lowering cams 61a and 61b, and the link disk 63, and a holding portion 50 in the first direction. It has spring hook shapes 70a, 70b for hooking the urging tension springs 53a, 53b, and stopper shapes 72a, 72b near the standby position of the carriage unit 20. Note that a buffer member can be attached to the stopper shapes 72a and 72b.
[0057]
Next, the operation will be described. When the motor 42 of the drive unit 40 is driven in one direction from a standby position, which is one end of the movement range, by a command from a control unit (not shown), the timing belt 41 is driven and locked at a part thereof. The carriage unit 20 is guided and driven in the cutting direction A of the sheet 100. At this time, the sheet 100 scissored between the rotary blade 12 and the fixed blade 31 is cut by being sandwiched between the rotary blade 12 and the fixed blade 31. When the carriage unit 20 moves in the cutting direction A of the sheet 100 and the sensor 47a or 47b detects that it has reached the standby position which is the other end in the moving direction, the driving of the motor 42 is stopped and the carriage unit 20 is stopped. Stops.
[0058]
In the present embodiment, stopper shapes 72a and 72b are formed in the overshoot area near the standby position of the carriage unit 20, and a contact surface between the stopper shapes 72a and 72b and the carriage unit 20 is made of, for example, urethane foam, rubber, or the like. The buffer member is fixed (not shown). This prevents the carriage section 20 from going too far in the event of a malfunction or the like, and provides a mechanical buffer in the event that the carriage section 20 collides with the stoppers 72a, 72b. Further, in the present embodiment, when the sensors 47a and 47b detect the arrival of the carriage section 20, a so-called short brake control for applying a brake to the inertial rotation using the back electromotive force of the motor 42 after a predetermined time is performed. ing. The arrival of the carriage unit 20 at the standby position is detected by, for example, an actuator that is engaged with a part of the carriage unit 20 and operated. Similarly, the carriage unit 20 can cut the sheet 100 in both directions by driving the motor 42 in the other direction according to a command from a control unit (not shown).
[0059]
【The invention's effect】
As described above, according to the present invention, in the sheet cutting apparatus that cuts the sheet by moving the moving unit holding the cutting unit from the standby position in the sheet width direction, the sheet is guided to the cutting position by the cutting unit. A first position at which the sheet is sandwiched and held between the sheet guide means and the sheet guide means on the upstream side of the cutting means, and a second position at which the sheet is detached from the sheet and can be transported Holding means movable between the first position and the second position, and elevating means for moving the holding means along a predetermined trajectory between the first position and the second position in accordance with the position of the moving means. It is characterized by the following.
[0060]
As described above, the link mechanism is configured to perform a planar motion in a plane orthogonal to the sheet surface in the width direction of the sheet, and the holding unit is moved up and down. Therefore, it is not necessary to deploy the mechanism before and after in the transport direction. The installation area can be reduced, and the entire device can be reduced in size and weight. For this reason, it is possible to reduce the size of the entire recording apparatus while preventing a shift in the width direction when cutting the sheet.
[Brief description of the drawings]
FIG. 1 is a perspective view of a recording apparatus having a sheet cutting device.
FIG. 2 is a perspective view of a main part of the sheet cutting apparatus as viewed from a conveyance upstream side, and shows a state in which a holding unit 50 holds and holds a sheet at a first position.
FIG. 3 is a perspective view of a main part of the sheet cutting apparatus as viewed from a downstream side of the conveyance, and is a diagram illustrating a state in which a pressing unit 50 presses and holds the sheet at a first position.
FIG. 4 is a perspective view of a main part of the sheet cutting apparatus as viewed from a conveying upstream side, in a state in which an engagement portion of a carriage unit 20 and an elevating cam 61a is engaged, and a pressing unit 50 holds the sheet at a second position. It is a figure showing a state in which it can be conveyed.
FIG. 5 is a plan view showing a conventional sheet cutting apparatus.
[Explanation of symbols]
P ... recording surface,
10: cutter, 11: center of rotation axis, 12: rotary blade,
20 ... carriage part,
30 ... guide part, 30a ... holding surface, 31 ... fixed blade,
40: drive unit, 41: timing belt, 42: motor,
42a: motor shaft, 43: pinion gear, 44: reduction gear,
45: a driving pulley, 45a: a driven gear portion, 45b: a winding portion,
46: idler pulley, 46b: winding part, 47a: sensor,
47a1 ... actuator, 47b ... sensor, 47b1 ... actuator
50 ... holding part, 51 ... holding plate, 51a ... shaft, 51b ... shaft,
51c: spring-hung shape, 51d: spring-hung shape, 52: holding elastic member,
53a ... tension spring, 53b ... tension spring,
60 ... elevating part, 61a ... elevating cam, 61a1 ... bearing part,
61a2 ... bearing part, 61b ... elevating cam, 61b1 ... bearing part,
61b2 ... bearing part, 62a ... connecting rod, 62a1 ... shaft, 62a2 ... shaft,
62b ... connecting rod, 62b1 ... shaft, 62b2 ... shaft,
63 ... link disk, 63a ... connection part, 63b ... connection part,
70: base, 70a: spring-hung shape, 70b: spring-hung shape,
71a ... shaft, 71b ... shaft, 72a ... stopper shape,
72b: Stopper shape, 73a: Shaft, 73b: Shaft, 76a: Shaft,
80 ... recording head,
100 ... sheet

Claims (9)

In a sheet cutting apparatus that cuts a sheet by moving a moving unit in which a cutting unit is held in a sheet width direction from a standby position,
Sheet guiding means for guiding the sheet to a cutting position by the cutting means,
Move between a first position where the sheet is sandwiched and held between the sheet guide unit and the sheet guide unit on the upstream side of the cutting unit and a second position where the sheet can be separated from the sheet and conveyed. Possible holding means,
Lifting means for moving the holding means along a predetermined trajectory between the first position and the second position according to the position of the moving means;
A sheet cutting device comprising: The elevating means has an engaging portion that engages with the moving means near a standby position at both ends of a moving range of the moving means,
2. The method according to claim 1, wherein one of the engaging portions of the elevating means engages with the moving means to raise the pressing means from the first position to the second position along a predetermined locus. The sheet cutting device according to the above. The sheet cutting device according to claim 1, wherein the predetermined trajectory is a trajectory that moves the pressing unit substantially vertically while keeping the holding unit parallel to a sheet surface. The sheet cutting apparatus according to any one of claims 1 to 3, wherein the lifting / lowering means is a multi-joint link mechanism that performs a planar motion in a plane orthogonal to the sheet surface in a sheet width direction. . The elevating means,
A pair of elevating cams which engage with the moving means in the vicinity of a standby position of the moving means and rotate to raise and lower the pressing means;
A pair of connecting rods rotatably supported at one end by the pair of elevating cams,
A link disk that constitutes a link mechanism by rotatably supporting the other end of the pair of connecting rods,
The sheet cutting device according to any one of claims 1 to 4, wherein the sheet cutting device is configured by: The sheet cutting apparatus according to claim 1, wherein the pressing unit is constantly urged by the urging unit from the second position to the first position. . A recording apparatus that performs recording on a continuous sheet and performs recording by cutting the sheet after recording,
A recording unit for recording on a sheet,
The sheet cutting device according to claim 1, which cuts a sheet on which recording has been performed.
A recording device comprising: 8. The printing apparatus according to claim 7, wherein the printing apparatus performs printing by discharging ink according to a signal. 9. The recording apparatus according to claim 8, wherein in the recording apparatus, the recording means energizes the electrothermal transducer in response to a signal, and ejects ink using thermal energy generated by the electrothermal transducer. .

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