JP4365005B2 - Medium width adjustment mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medium width adjusting mechanism of an apparatus for conveying a medium such as a certificate or a slip.
[0002]
[Prior art]
There is known an apparatus that prints information such as a certificate issuer, a number, a certificate requester, and a delivery destination on a paper medium such as a certificate or a slip. In this type of printing device, paper media such as slips and certificates to be printed are stored in the internal storage unit, the paper medium in the storage unit is conveyed to the printing unit for printing, and then the paper medium is output to the outside. It is supposed to be.
[0003]
[Problems to be solved by the invention]
By the way, when the medium is transported to the printing unit, the medium is transported obliquely due to variations in transport force of the rollers that transport the medium, friction between the medium and the transport roller, or the medium is perpendicular to the transport direction. It may be transported out of position.
[0004]
If the printing position is strictly determined when the medium is tilted or conveyed to the printing unit in a state shifted in the width direction of the medium (direction orthogonal to the conveyance direction), a predetermined printing area The problem of not being printed inside occurs.
[0005]
An object of the present invention is to allow a medium to be conveyed along a reference plane.
[0006]
[Means for Solving the Problems]
The medium width narrowing mechanism of the present invention is provided on the curved conveyance path, the inlet or outlet side of the curved conveyance path, and is movable to a position facing the reference roller and the reference roller. An attached pinch roller, a connecting part that is connected to the pinch roller, and moves or rotates in conjunction with the movement of the pinch roller, and moves in conjunction with the connecting part, and moves the medium in the curved conveyance path. When the medium is sandwiched between the reference roller and the pinch roller, the connecting portion is moved by the movement of the pinch roller when the medium is sandwiched between the reference roller and the pinch roller. Or when the pressing portion moves to a position away from the medium and the medium is not sandwiched between the reference roller and the pinch roller, The connecting portion moves or rotates by the movement of the pinch roller, the pressing portion moves in conjunction with the connecting portion, and the pressing portion presses the medium against the reference surface in the curved conveyance path. .
[0007]
According to the present invention, the side surface of the medium is pressed against the reference surface when the medium is curved and free in the conveyance path, so that the medium is deformed when the medium is pressed against the reference surface. It is possible to prevent this, and the medium can be accurately conveyed along the reference surface.
[0008]
In the medium width adjusting mechanism, the reference roller and the pinch roller convey the medium inside the curved conveyance path with the medium interposed therebetween, and the rear end of the medium is between the reference roller and the pinch roller. When it comes off, the connecting portion moves in conjunction with the movement of the pinch roller, and the pressing portion moves in conjunction with the connecting portion to press the medium against the reference surface.
[0009]
According to the present invention, in addition to the effect of the first aspect of the invention, the skew of the medium can be corrected by abutting the medium against the reference roller in the curved conveyance path.
Further, a pinch roller that is movably attached to a position facing the reference roller, a first connecting portion that moves in conjunction with the movement of the pinch roller, and a second that moves or rotates by the movement of the first connecting portion. , A first elastic member that applies a force in a direction in which the pressing portion moves away from the medium, and a second elastic member that connects the pressing portion and the second connecting portion, and the reference roller and the pinch When the medium is not sandwiched between the rollers, the first connecting portion is moved by the movement of the pinch roller, and the second connecting portion is moved or rotated in one direction by the movement of the first connecting portion. When a tension is applied to the elastic member 2 to press the pressing portion against the medium and the medium is sandwiched between the reference roller and the pinch roller, the first connecting portion is moved by the movement of the pinch roller. The second connecting part is on the other side Moved or rotated to the second elastic member is a free state, pressing part may be configured away from the medium by the tension of the first elastic member.
[0010]
With this configuration, the width can be reliably increased when the medium is in a free state. Moreover, since it can be comprised with a machine part, a width-measuring mechanism can be implement | achieved at lower cost.
[0011]
In addition, the curved conveyance path and the pressing unit are arranged at a position on the medium conveyance path that has passed the printing unit, and after the medium has passed the printing unit, the medium is bent in the curved conveyance path. You may comprise so that it may press on a reference plane.
[0012]
With such a configuration, the width-measuring mechanism can be provided at a place other than on the conveyance path route to the printing unit. Therefore, the width-measuring mechanism can be provided in the empty space of the apparatus, and the apparatus can be downsized.
[0013]
According to a seventh aspect of the present invention, there is provided a width adjusting mechanism including a first roller that provides a driving force for conveying a medium, a second roller that is movably attached to a position facing the first roller, and a second roller A first coupling part that moves in conjunction with the roller, a second coupling part that moves or rotates in conjunction with the first coupling part, and a second coupling that mechanically interlocks with the second coupling part. A pressing unit that presses the medium against the reference surface according to the movement or rotation of the unit.
[0014]
According to the present invention, the medium can be widened to the reference plane when it becomes free in the transport path. In addition, since the width adjusting mechanism can be constituted by mechanical parts such as the first and second rollers and the first and second connecting portions, it is possible to provide a width adjusting mechanism that is low in cost and has few failures.
[0015]
In addition, you may comprise a width-measuring mechanism combining suitably each element of each claim.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a printing apparatus according to an embodiment of the present invention.
[0017]
The printing apparatus 11 includes storage units 12 and 13 that store media 35 such as slips and certificates having different sizes or specifications, feed rollers 14 and 15 that feed out the media 35 from the storage units 12 and 13, respectively, and the medium 35 is a magnetic stripe. Etc., the MS unit 16 for writing predetermined data in the magnetic stripe, the transport rollers 17 and 18 driven by a motor or the like, and the pinch roller 19 for feeding the medium in contact with the transport rollers 17 and 18 respectively. , 20, the print head 21, the platen 22 that fixes the medium 35 when printing, the skew correction mechanism unit 23 that corrects the skew of the medium 35, and the stacker 24 in which the printed medium 35 is stored. And a reject unit 25 for storing the medium 35 rejected due to some defect.
[0018]
The skew correction and width reducing mechanism unit 23 includes a conveyance path composed of two curved plate-shaped guides, a reference roller 31, a pinch roller 33, a lever 38 that abuts the medium 35 against the reference roller 31, and a medium. It comprises a width-measuring mechanism portion 61 and the like for making 35 the width of the side surface of the conveyance path.
[0019]
The medium 35 stored in the storage unit 12 or 13 is fed to the transport path by the feed roller 14 or 15 and transported to the print head 21 by the transport rollers 17 and 18. The medium 35 conveyed to the position of the print head 21 passes through the print head 21 and is conveyed to the skew correction and width adjusting mechanism unit 23, and is conveyed by the reference roller 31 until the rear end of the medium 35 is separated from the reference roller 31. Is done. Then, the side surface of the medium 35 that has become free in the curved conveyance path is pressed against the side surface of the conveyance path to make the medium 35 wider, and the end surface of the medium 35 is abutted against the reference roller 31. The skew of the medium 35 is corrected.
[0020]
FIG. 2 is a perspective view of the skew correction and width adjusting mechanism 23. FIG. 2 shows only the skew correction mechanism.
As shown in FIG. 2, the skew correction and width reducing mechanism unit 23 includes two reference rollers 31 and 32 that convey the medium 35, and pinch rollers 33 and 34 that are in contact with the reference rollers 31 and 32, respectively. Two plate-like guides 36 and 37 that serve as a conveyance path for the medium 35, a lever 38, and a coil spring (elastic member) 49 that applies a force in a direction in which the medium 35 abuts against the reference rollers 31 and 32 to the lever 38. It consists of. The reference rollers 31 and 32 and the pinch rollers 33 and 34 are made of, for example, rubber. As an elastic member for applying a clockwise rotational force to the lever 38, a plate spring, a rubber or resin spring, and other elastic bodies can be used in addition to the coil spring.
[0021]
The lever 38 is made of, for example, a steel plate, plastic, or the like, and includes four levers 38a to 38d as shown in FIG.
The pinch roller 33 is rotatably attached to the attachment plate 39, and the attachment plate 39 is rotatably attached to the shaft 40 of the adjustment plate 42. Further, one end of a coil spring 41 is fixed to the attachment plate 39, and the other end of the coil spring 41 is fixed to the adjustment plate 42. The adjustment plate 42 is fixed to the apparatus main body with screws or the like.
[0022]
That is, the mounting plate 39 is given a force that rotates clockwise around the shaft 40 by the coil spring 41, and as a result, the pinch roller 33 comes into pressure contact with the reference roller 31.
[0023]
Similarly, the pinch roller 34 is rotatably attached to the attachment plate 43, and the attachment plate 43 is rotatably attached to the shaft 44 of the adjustment plate 46. Furthermore, one end of a coil spring 45 is fixed to the attachment plate 43, and the other end of the coil spring 45 is fixed to the adjustment plate 46. The adjustment plate 46 is fixed to the apparatus main body with screws or the like. A force that presses the pinch roller 34 against the reference roller 34 is also applied by the coil spring 45.
[0024]
The reference roller 32 is configured to be wide, and the pinch roller 34 comes into contact with the reference roller 32 when the mounting position of the mounting plate 46 is shifted in accordance with the width of the medium 35.
[0025]
The lever 38 includes four levers 38a to 38d. Four slits 51a to 51d are provided at positions corresponding to the levers 38a to 38d of the guides 36 and 37, and the guide 36 is rotated when the levers 38a to 38d are rotated. , 37 so as not to contact.
[0026]
The levers 38a and 38b are made by bending a single steel plate into a U-shape with a press or the like, and two through holes for inserting the shaft 48 are provided in the vicinity of the bent portion. One end of a coil spring 49 is attached to the center of the levers 38a and 38b opposite to the portion that presses the medium 35, and the other end of the coil spring 49 is fixed to the apparatus main body.
[0027]
Similarly, the levers 38c and 38d are made by bending a single steel plate into a U-shape with a press or the like, and are provided with two through holes for inserting the shaft 48. Further, one end of a coil spring 50 is attached to the central portion of the lever 38c and 38d opposite to the portion that presses the medium 35, and the other end of the coil spring 50 is fixed to the apparatus main body.
[0028]
As a result, the levers 38a to 38d are given a force that rotates in the clockwise direction by the coil springs 49 and 50, so that the end surface of the medium 35 that is in a free state in the curved conveyance path is moved by the levers 38a to 38d. The skew of the medium 35 is corrected by being pressed against 31 and 32.
[0029]
Next, FIG. 3 is a side perspective view of the width adjusting mechanism 61 according to the first embodiment of the present invention, FIG. 4 is a top view of the width adjusting mechanism 61, and FIG. 5 is a width adjusting mechanism 61. It is the upper surface and side view of the principal part.
[0030]
As shown in FIGS. 3 and 4, the width reducing mechanism 61 is disposed on the side surfaces of the curved guides 36 and 37.
As shown in FIGS. 3 and 5, the width adjusting mechanism 61 includes a base plate 62, a pressing plate 63 movably attached to the base plate 62, and an arrow C in FIG. 4 on the pressing plate 63. Coil springs 65 and 66 for applying directional tension, a lever 64 and a coil spring 67 for moving the pressing plate 63 in the direction of arrow D or C in FIG. 4, and the left and right directions of the pinch rollers 33 and 34 (front side in FIG. 3). And a lever 68 that changes the rotation angle of the lever 64 in conjunction with the movement of the lever 64. In this case, the lever 68 corresponds to the mounting plate 39 of FIG.
[0031]
Two pins 69 are provided on the lower surface of the pressing plate 63, and a long hole 70 is provided in the base plate 62 at a position corresponding to the pin 69. Then, the pin 69 of the pressing plate 63 is inserted into the elongated hole 70 of the base plate 62 so that the pressing plate 63 can move in the direction of arrow C or arrow D in FIG.
[0032]
The upper and lower portions of the pressing plate 63 are bent in an L shape, the lower bent portion (the lower side in FIG. 5) constitutes a pressing surface 63a that presses the medium 35, and the upper bent portion is A bent portion 63b to which one end of a coil spring 67 that connects the pressing plate 63 and the lever 64 is attached is configured.
[0033]
As shown in FIG. 5, bent portions 63c and 63d bent in an L-shape are provided on the left and right of the upper portion of the pressing surface 63a of the pressing plate 63, and the bent portions 63c and 63d are respectively provided with the bent portions 63c and 63d. One ends of the coil springs 65 and 66 are fixed, and the other ends of the coil springs 65 and 66 are fixed to bent portions 62 a and 62 b on the upper part of the base plate 62.
[0034]
The lever 64 is provided with through holes on the upper and lower sides of a member bent in a U shape. A shaft 71 fixed to the base plate 62 is inserted into the through-hole, and can rotate about the shaft 71.
[0035]
The lever 64 is composed of a lever 64a and a lever 64b whose respective longitudinal angles are about 90 degrees, the tip of the lever 64b is bent at a right angle, and one end of the coil spring 67 is fixed to the bent portion 64c of the tip. The other end of the coil spring 67 is fixed to the upper end portion 63 a of the pressing plate 63.
[0036]
As shown in FIG. 3, the lever 64 a is given a rotational force by a lever 68 that moves in the left-right direction (left-right direction in FIG. 3) in conjunction with the pinch roller 33.
That is, an upward force in FIG. 5 is applied to the pressing plate 63 by the coil springs 65 and 66, and when the force from the lever 64 is not applied, the pressing plate 63 is moved by the coil springs 65 and 66. It is pulled upward in FIG. 5 and is away from the medium 35.
[0037]
When the lever 64 connected via the coil spring 67 rotates in the counterclockwise direction, the pressing plate 63 is connected to the lever 64 by the coil spring 67, so that the lever 64 is pulled downward in FIG. The pressing surface 63a is pressed against the medium 35.
[0038]
As shown in FIG. 3, the lever 64 is configured to rotate by being pressed by the upper end portion 68 a of the lever 68. The lever 68 is provided with a through hole below the center, the through hole is inserted into the shaft 40, and the pinch roller 33 is rotatably attached to the lower end.
[0039]
Next, the operation of the width adjusting mechanism of the first embodiment configured as described above will be described.
First, the operation of the width adjusting mechanism when the medium 35 is transported from the lower direction to the upper direction in FIG. 3 and the leading end of the medium 35 is sandwiched between the reference roller 31 and the pinch roller 33 will be described.
[0040]
When the medium 35 is sandwiched between the reference roller 31 and the pinch roller 33, the pinch roller 33 is pushed by the medium 35 and moves rightward in FIG. When the pinch roller 33 moves in the right direction, the upper end portion 68a of the lever 68 moves in the left direction and comes to a position indicated by a two-dot chain line in FIG.
[0041]
When the lever 64 is not pressed against the upper end portion 68a of the lever 68, the force in the direction of extending the coil spring 67 does not act, so the lever 64b rotates in the clockwise direction. Further, since the tension by the coil spring 67 does not act, the pressing plate 63 is pulled in the direction C (upward) in FIG. 4 by the tension of the coil springs 65 and 66 itself, and the pressing plate 63 is separated from the medium 35.
[0042]
That is, when the leading edge of the medium 35 passes through the print head 21 and is conveyed to a position sandwiched between the reference roller 31 and the pinch roller 33, the pressing plate 63 is moved in the direction of arrow C in FIG. Pulled and moved upward, the pressing plate 63 is separated from the medium 35, and the medium 35 becomes free.
[0043]
The positions of the lever 64 and the pressing plate 63 indicated by a two-dot chain line in FIG. 4 are such that the medium 35 is sandwiched between the reference roller 31 and the pinch roller 33, the lever 64 rotates clockwise, and the pressing plate 63 is an arrow. The position when moving in the C direction is shown.
[0044]
Next, the operation when the medium 35 is widened will be described. When the medium 35 is conveyed into the curved guides 36 and 37 by the reference roller 31 and the rear end of the medium 35 comes out between the reference roller 31 and the pinch roller 33, the pinch roller 33 moves to the left in FIG. To do. When the pinch roller 33 moves in the left direction, the upper end portion 68a of the lever 68 moves in the right direction, and is pressed by the upper end portion 68a to rotate the lever 64 in the counterclockwise direction (arrow A direction in FIG. 4). When the lever 64 rotates counterclockwise, a force in the direction of pulling the coil spring 67 is applied, and when the force becomes greater than the tension of the coil springs 65 and 66, the pressing plate 63 moves in the direction of arrow D in FIG. As a result, the medium 35 that is in a free state among the curved guides 36 and 37 is made to have a width on the side surface 72 by the pressing plate 63. At this time, by setting the rotation angle of the lever 64b that is pushed and rotated by the lever 68 to an appropriate value, the lever 64b rotates and the coil spring 67 extends even after the pressing plate 63 contacts the medium 35, thereby extending the medium. 35 can be widened in the direction of the side surface 72 with a constant force.
[0045]
The positions of the lever 64 and the pressing plate 63 indicated by solid lines in FIG. 4 are such that the medium 35 comes out from between the reference roller 31 and the pinch roller 33, and the lever 64b rotates in the direction of arrow A in FIG. The position when the plate 63 moves in the direction of arrow D and presses the medium 35 against the side surface 72 is shown.
[0046]
According to the first embodiment, the side surface (reference surface) 72 of the conveyance path allows the medium 35 to be bent in the curved conveyance path by the pressing plate 63 that operates in conjunction with the conveyance mechanism of the medium 35. Therefore, it is possible to prevent the medium 35 from being deformed, for example, from being bent by a force applied to the side surface of the medium 35 when the width is reduced, and the medium 35 can be uniformly widened. Thereby, it is possible to accurately print at a predetermined position on a medium such as a certificate or a slip whose printing position is strictly determined.
[0047]
Further, since the pressing plate 63 operates in conjunction with the transport mechanism, an electric driving force for reducing the width of the medium 35 is unnecessary, and a detection mechanism that detects that the medium 35 is in a free state. Is also unnecessary, and the width-measuring mechanism can be realized with a simpler configuration.
[0048]
Further, since the pressing plate 63 and the lever 64b are connected by the coil spring 67, it is possible to deal with the medium 35 having different widths. For example, when the width of the medium 35 is wide, the pressing surface 63a contacts the side surface of the medium 35 at a higher position (viewed from the front of FIG. 4), and then the coil spring 67 is pulled by the lever 64b, The medium 35 is pressed against the side surface 72 by the tension of the coil spring 67. On the other hand, when the width of the medium 35 is narrower than that, the pressing surface 63a comes into contact with the side surface of the medium 35 at a position below it, and then the coil spring 67 is pulled by the lever 64b.
[0049]
That is, the amount of extension of the coil spring 67 changes in accordance with the width of the medium 35, whereby the difference in the width of the medium 35 can be absorbed.
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same member as the member of FIGS. 3-5, and those description is abbreviate | omitted. FIG. 7 shows only the width adjusting mechanism 80 with the print head 21 omitted.
[0050]
In the second embodiment, the rotation angle of the lever 64 is controlled by moving the print head 21, and the medium 35 is made to have a width on the reference plane in the curved conveyance path.
[0051]
As shown in FIGS. 6 and 7, the print head 21 is fixed to the attachment portion 81, and a through hole is provided in the attachment portion 81, and the through hole is inserted into the shaft 82. A belt 83 is fixed to the attachment portion 81, and the belt 83 is driven by a pulley 84 that is rotatably fixed to the apparatus main body and a pulley 86 of a motor 85.
[0052]
As shown in FIGS. 6 and 7, the lever 64 includes a lever 64 a that rotates in the horizontal direction about the shaft 71, and a lever 64 c that is provided on a surface orthogonal to the surface that the lever 64 a extends. The lever 64 c is configured to come into contact with the lever 81 a at the upper end portion of the attachment portion 81 of the print head 21.
[0053]
The positions of the lever 64 and the pressing plate 63 indicated by a two-dot chain line in FIG. 7 are such that the lever 81a of the mounting portion 81 of the print head 21 presses the lever 64c, that is, the pressing plate 63 is separated from the medium 35. The position is shown.
[0054]
Further, the positions of the lever 64 and the pressing plate 63 indicated by solid lines are such that the lever 81a of the mounting portion 81 of the print head 21 presses the lever 64c, and the lever 64b rotates counterclockwise so that the pressing plate 63 is positioned in FIG. This indicates the position when the pressing plate 63 is pushed down in the direction of arrow D, that is, when the pressing plate 63 extends the medium 35 to the side surface 72.
[0055]
Next, the operation of the width adjusting mechanism 80 according to the second embodiment having the above-described configuration will be described.
The reference roller 31 is rotated counterclockwise to convey the medium 35 in the direction of the curved guides 36 and 37 for a predetermined time or longer so that the rear end of the medium 35 comes out between the reference roller 31 and the pinch roller 33. . In this state, the motor 85 is driven to move the attachment portion 81 of the print head 21 in the upward direction in FIG. 7 and move to a position where the lever 81a of the attachment portion 81 presses the lever 64c.
[0056]
When the lever 64c is pressed by the lever 81a, the lever 64b configured integrally with the lever 64c rotates counterclockwise. As a result, the coil spring 67 connected to the lever 64b is pulled in the direction of arrow D in FIG. When the coil spring 67 is pulled downward in FIG. 7 and the tension of the coil spring 67 becomes larger than the tension of the coil springs 65 and 66, the pressing plate 63 is pushed down in the direction of arrow D in FIG. 63 a contacts the medium 35.
[0057]
When the mounting portion 81 of the print head 21 moves further upward and the lever 64b further rotates counterclockwise, the coil spring 67 is further pulled, and a force corresponding to the tension is applied to the medium 35. As a result, the medium 35 is pressed against the side surface 72 of the guide 36 or 37 by the force corresponding to the tension against the coil spring 67, and the medium 35 is made wider.
[0058]
Thereafter, when the motor 85 is driven to move the mounting portion 81 downward in FIG. 7 and the lever 81a is moved to a position where the lever 64c is not pressed, the force in the direction of extending the coil spring 67 from the lever 64b does not act. Therefore, the coil spring 67 contracts, and thereby the coil springs 65 and 66 also contract. Then, the pressing plate 63 is pulled in the direction of arrow C in FIG. 7 by the coil springs 65 and 66, and the pressing plate 63 is separated from the medium 35.
[0059]
According to the second embodiment, the medium 35 can be pressed against the side surfaces 72 of the guides 36 and 37 in a curved state in the curved conveyance path as in the first embodiment. The medium 35 which is inclined in the middle of the conveyance or shifted in parallel to the conveyance direction can be made uniform in width to the reference surface.
[0060]
Further, since the mounting portion 81 of the print head 21 is moved by the motor 85 and the pressing plate 63 is moved thereby to make the medium 35 wider, the movement position of the print head 21 by the motor 85 is controlled. Thus, the rotation angle of the lever 64b can be arbitrarily changed. Thereby, for example, by moving the print head 21 to a position corresponding to the width of the medium 35, it is possible to set the width adjustment amount suitable for the medium 35 having various widths.
[0061]
In addition, since the lever 64 is rotated by using the motor 85 that moves the print head 21 and the pressing plate 63 is pressed against the medium 35, a new motor and lever 64 is provided for the width adjusting mechanism 80. There is no need to provide a moving mechanism or the like for pressing, and the width reducing mechanism 80 can be realized at a lower cost.
[0062]
In the above-described embodiment, the width of the medium 35 is increased in the curved conveyance path. However, the medium 35 may be increased in width in conjunction with the conveyance mechanism while the medium is being conveyed in parallel. .
[0063]
Further, the width of the medium 35 is adjusted after passing through the print head 21, but a curved or parallel conveyance path is provided on the front side of the print head 21, and the medium is adjusted by the above-described width reducing mechanism in the conveyance path. You may make it widen.
[0064]
In the above-described embodiment, the coil spring is used for the width adjusting mechanism portions 61 and 80, but other elastic members other than the coil spring, for example, an elastic body such as a leaf spring, plastic, and rubber may be used. The method of connecting the pressing plate 63 and the lever 64b is not limited to the coil spring 67, and other elastic members may be used, or mechanical connection may be performed without using the elastic member.
[0065]
You may implement | achieve combining each element of embodiment mentioned above and its modification suitably.
[0066]
【The invention's effect】
According to the present invention, by making the medium wider in the curved conveyance path, it is possible to prevent the medium from being deformed by the force applied to the medium when the medium is made wider, and press the medium more uniformly to the reference surface. You can guess. Further, by operating the width adjusting mechanism in conjunction with the transport mechanism, the width can be reduced when the medium becomes free.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a printing apparatus.
FIG. 2 is a perspective view of a skew correction mechanism.
FIG. 3 is a side view of the width adjusting mechanism portion of the first embodiment.
FIG. 4 is a top view of the width adjusting mechanism portion of the first embodiment.
FIGS. 5A and 5B are a top view and a side view of a main part of the width adjusting mechanism. FIGS.
FIG. 6 is a side view of a width reducing mechanism unit according to a second embodiment.
FIG. 7 is a top view of a width reducing mechanism unit according to a second embodiment.
[Explanation of symbols]
31, 32 Reference roller 33, 34 Pinch roller 35 Medium 36, 37 Guide 38 Lever 61, 81 Width adjusting mechanism 63 Pressing plate 64 Lever 65, 66, 67 Coil spring 68 Lever 80 Width adjusting mechanism

Claims (3)

A curved transport path;
A reference roller that is provided on the side that becomes the inlet or the outlet of the curved conveyance path and conveys the medium;
A pinch roller movably attached to a position facing the reference roller;
A connecting portion connected to the pinch roller and moving or rotating in conjunction with the movement of the pinch roller;
A pressing part that moves in conjunction with the connecting part and presses the medium against a reference plane parallel to the transport direction in the curved transport path;
When the medium is sandwiched between the reference roller and the pinch roller, the connecting part moves or rotates by the movement of the pinch roller, and the pressing part moves to a position away from the medium, When the medium is not sandwiched between the reference roller and the pinch roller, the connecting portion moves or rotates by the movement of the pinch roller, and the pressing portion interlocks with the connecting portion. And a pressing mechanism that presses the medium against a reference surface in the curved conveyance path. The reference roller and the pinch roller convey the medium inside the curved conveyance path, and the pinch roller moves when the rear end of the medium comes out between the reference roller and the pinch roller. The medium width adjusting mechanism according to claim 1, wherein the connecting portion moves or rotates in conjunction with the connecting portion, and the pressing portion moves in conjunction with the connecting portion to press the medium against a reference surface. A curved transport path;
A first roller that is provided on an inlet or outlet side of the curved conveyance path and conveys a medium;
A second roller movably attached to a position facing the first roller;
A connecting portion connected to the second roller and moving or rotating in conjunction with the movement of the second roller;
A pressing part that moves in conjunction with the connecting part and presses the medium against a reference plane parallel to the transport direction in the curved transport path;
When the medium is sandwiched between the first roller and the second roller, the connecting portion is moved or rotated by the movement of the second roller so that the pressing portion is separated from the medium. When the medium is not sandwiched between the first roller and the second roller, the connecting portion is moved or rotated by the movement of the second roller. A media width adjusting mechanism in which the pressing portion moves in conjunction with the connecting portion, and the pressing portion presses the medium against a reference surface in the curved conveyance path.

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