JP7299082B2 - Recording medium conveying device for printer - Google Patents

Description

The present invention relates to a recording medium conveying device for a printer.

2. Description of the Related Art In a printer in which a recording medium is sandwiched between a driving roller (grid roller) and a pinch roller (pressure roller), a recording medium conveying device is known in which the pressing force of the pinch roller is varied by a coil spring. (See Patent Document 1, for example).
In addition, the inkjet recording apparatus includes a drive roller and a plurality of driven rollers (pinch rollers) that are divided and arranged to press a recording medium (paper) with a predetermined pressure, and the pressing force of the driven roller to the drive roller is individually controlled. is known (see Patent Document 2, for example).

JP-A-8-72489 JP 2015-20857 A

When printing on multiple types of paper using the same printer, such as an inkjet printer, the pressing force of the pressure roller against the grid roller (drive roller) can be set in multiple stages according to the type, material, weight, etc. of the paper. It is desirable to change the setting to match the paper to be printed.
SUMMARY OF THE INVENTION It is a primary object of the present invention to provide a recording medium conveying device capable of changing the pressure applied by a pressure roller to a grid roller in multiple stages.
Further, there is a demand for a function that allows selective use of individual pressure rollers among a large number of pressure rollers according to the width of the paper to be used.
Another object of the present invention is to provide a recording medium conveying device capable of handling various types of paper widths by selectively using individual pressure rollers among a large number of pressure rollers.

In order to achieve the above object, the present invention provides a recording medium with a grid roller 20 connected to a driving system and a plurality of pressure rollers 8 which are divided and arranged in the width direction of the recording medium so as to face the grid roller 20 . , conveying a recording medium by rotation of grid rollers 20, and printing on the recording medium. , a media set lever 46 supported by the machine body so as to be movable in a predetermined direction, a plurality of pressure bases 24 attached to the head guide rails 6, and a shaft rotatably supported along the head guide rails 6. A pressure arm 30 having a body 22 and a pressure roller 8 and supported by each of the pressure bases 24 so as to be swingable around a shaft portion 32; biasing force applying means for applying a biasing force in the direction toward the grid roller 20; of the force applied to each of the pressurizing arms 30 changes in multiple stages corresponding to the rotation of the shaft body 22 driven by the movement of the media set lever 46 .
In the present invention, a recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided in the width direction of the recording medium so as to face the grid roller 20. A recording medium conveying device for a printer that conveys a recording medium by the rotation of the head and prints on the recording medium. A media set lever 46 supported by the machine so as to be movable in any direction, a plurality of pressure bases 24 attached to the head guide rail 6, and a shaft 22 rotatably supported along the head guide rail 6. , a pressure roller 8, and a pressure arm 30 supported by each of the pressure bases 24 so as to be capable of swinging around a shaft portion; 20, and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22. A biasing force is applied to the pressure arm 30 corresponding to the rotation of the shaft 22 accompanying the movement of the media set lever 46, and each pressure arm 30 is provided with the shaft 22 and the pressure force. A pressure stopping means is provided for releasably disconnecting the connection with the pressure arm 30 and for maintaining the state in which the pressure roller 8 is lifted from the grid roller 20 .
Further, the present invention is characterized in that biasing force changing means for changing the biasing force set by the biasing force applying means for each pressure arm 30 is provided.
In addition, the present invention provides the pressure arms 30 for disconnecting the linkage between the shaft 22 and the pressure arms 30 so as to maintain the state where the pressure roller 8 is raised from the grid roller 20. It is characterized by providing pressurization stopping means.
Further, according to the present invention, the urging force applying means comprises a cam body 42 fixed to the shaft body 22, a pressure spring arm 26 rotatably supported by the pressure base 24, and the pressure spring arm. 26 and a coil spring 36 attached between the other eccentric portion of the pressure spring arm 26 and the pressure arm 30. and the biasing force applied to the pressure spring arm 26 varies depending on the position of the pressure convex surface 44 of the cam body 42 with respect to the pressure spring arm 26. .
Further, according to the present invention, the motion conversion means is slidably engaged with the guide slit 56 formed in the media set lever 46 through a projection 60 on one side, and the shaft body on the other side. 22, and the link piece 58 swings around the shaft 22 according to the position of the media set lever 46 with respect to the machine body. It is characterized in that the shaft 22 is made to rotate.
Further, according to the present invention, the urging force changing means is configured by slidably arranging a multi-stage pressing knob member 38 on the pressing arm 30 via a guide portion, and the multi-stage pressing knob member 38 is provided with a convex portion 40. A reference position where the multi-stage pressurizing knob member 38 is pushed farthest in the depth direction of the guide portion, a first-stage pulled position where the guide portion is pulled out by a predetermined amount from the reference position, and a predetermined amount further pulled out from the first-stage pulled position. When the multistage pressing knob member 38 is at the reference position, the projection 40 prevents the pressing spring arm 26 from rotating in one direction. , at the first-stage pulled position, the convex portion 40 retreats from the position where the pressure spring arm 26 is engaged by a predetermined amount, and at the second-stage pulled position, the convex portion 40 retracts from the pressure spring arm 26. is largely retracted from the locking position, and the one-way rotation of the pressure spring arm 26 is made free.
Further, according to the present invention, the media set lever 46 can be slid in the longitudinal direction of the machine body along a guide provided on the machine body, and the media set lever 46 can be freely attached and detached at the reference position on the side of the media set lever 46. A positioning portion 52 is provided for locking, and the position of the media set lever 46 with respect to the machine body is set to the reference position, a pushed position that is a predetermined amount of movement to the back of the machine body from the reference position, and a large pull-out position to the outside of the machine body from the reference position. When both the media set lever 46 and the multi-stage pressurizing knob member 38 are at the reference positions, the elastic force of the coil spring 36 causes the pressurizing roller 8 to move to the grid roller 20 and the coil When the media set lever 46 is in the pushing position and the multistage pressing knob member 38 is in the reference position, the convex surface 44 of the cam body 42 presses against the pressure. The eccentric portion of the spring arm 26 is pushed up, the pressing force of the pressure roller 8 against the grid roller 20 is set to a value larger than the standard pressure, the media set lever 46 is at the reference position, and the multi-stage pressurization is performed. When the pressure knob member 38 is at the first stage pull position, the convex portion 40 retreats by a predetermined amount from the position where the eccentric portion of the pressure spring arm 26 is locked, and the pressure force of the pressure roller 8 against the grid roller 20 is applied. is set weakly.
Further, according to the present invention, when the media set lever 46 is at the pulled-out position and the pressure roller 8 is separated from the grid roller 20, the multistage pressure knob member 38 is positioned at the second-stage pulled position. , the pressurizing stop state in which the movement of the media set lever 46 is not transmitted to the pressurizing arm 30, and the state in which the pressurizing roller 8 is separated from the grid roller 20 is maintained.
Further, according to the present invention, the pressurizing stop means is configured by providing a multi-stage pressurizing knob member 38 movably in the front-rear direction on the pressurizing arm 30, and the convex portion provided on the multi-stage pressurizing knob member 38 The rotation of the pressure spring arm 26 is stopped by 40, and the cam body 42 provided on the shaft body 22 resists the elastic force of the coil spring 36 between the pressure spring arm 26 and the pressure arm 30. With the eccentric portion of the pressure arm 30 pushed down and the pressure roller 8 raised with respect to the grid roller 20, the multistage pressure knob member 38 is moved by a predetermined distance to move the convex portion 40 to the pressure spring. The pressure spring arm 26 is made rotatable within a predetermined range by separating the arm 26 from the locking position, and the pressure roller 8 is kept in a raised state with respect to the grid roller 20. and

In the present invention, it is possible to change the pressure applied to the grid roller by a large number of pressure rollers provided in the longitudinal direction of the apparatus in multiple stages, and it is also possible to selectively use individual pressure rollers. , various types of recording media, various types of recording media, and various widths of recording media. In addition, not only can individual pressure rollers be selectively used, but also the urging force can be selectively changed. You can set it up and handle it.

FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory cross-sectional view along the line AA of the main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 2 is an explanatory diagram of a main part of the present invention; FIG. 3 is an external explanatory view of a main part of the present invention; FIG. 2 is an external explanatory view of a printer device; FIG. 2 is an external explanatory view of part of the printer device;

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 15 is an external explanatory view showing the overall structure of the front side of the printer apparatus. When the front cover 2 is opened, the print head 4 arranged inside the cover, the head guide rail 6 for guiding the print head 4, and the head guide rails 6 are installed. A large number of media pressure rollers 8 arranged along the line are visible.

The front cover 2 is opened and closed when setting media (paper) or checking printing, and is normally closed. Maintenance covers 12 and 14 are arranged on both sides of a machine body 10 of the printer device, and a head guide rail 6 is constructed over the longitudinal direction of the device. A carriage 16 having a print head 4 is movably connected to the head guide rail 6 .

A media guide 18 is arranged below the head guide rail 6 to support media such as paper and guide the media from the rear to the front of the machine body 10 . Grid rollers 20 are disposed on the body 10 below the movement path of the print head 4 and are connected to the drive system as shown in FIG.

A shaft 22 (see FIG. 3) having a hexagonal surface is arranged on the lower side of the head guide rail 6 in parallel with the longitudinal direction of the head guide rail 6, and the shaft 22 is rotatable on both sides of the machine body 10. supported by As shown in FIG. 1, a plurality of pressure bases 24 (20 or more in this embodiment) are connected to the head guide rail 6 at predetermined intervals, and each pressure base 24 is bent into an L shape. A pressing spring arm 26 is rotatably supported via a shaft 28 in a plane perpendicular to the media plane and perpendicular to the longitudinal direction of the head guide rail 6 .

A pressure arm 30 is rotatably supported on the pressure base 24 about shafts 32 (see FIG. 14) on both sides within a plane perpendicular to the plane of the medium. A pressure roller 8 is rotatably connected to one side of the pressure arm 30 , and the pressure roller 8 faces the grid roller 20 . A coil spring 36 is arranged between one of the pressure spring arms 26 and the other of the pressure arms 30, and the tensile force of the coil springs 36 causes the pressure arms 30 to move around the shaft portion 32 in FIG. is biased clockwise as

A multistage pressurizing knob member 38 is attached to a guide portion on the surface of the pressurizing arm 30 so as to be slidable in a direction perpendicular to the longitudinal direction of the head guide rail 6. It is releasably locked to the pressurizing arm 30 at three stages of positions, ie, the first stage position and the second stage position.

A protrusion 40 is formed on the multi-stage pressurizing knob member 38 , and the other side of the pressurizing spring arm 26 is in elastic contact with the side surface of the protrusion 40 by the biasing force of the coil spring 36 . A cam body 42 is fixed to the shaft body 22 , and a convex surface 64 is formed on the cam body 42 for raising and separating the pressure roller 8 from the grid roller 20 .
A plate-shaped media setting lever 46 is supported on the side of the machine body 10 via a slide guide mechanism so as to be slidable in the longitudinal direction of the machine body 10 . A handle 48 and a handle 48 are provided. As shown in FIG. 16, the handle 48 is movable in the longitudinal direction with respect to the fuselage 10. Therefore, it is possible to use the handle 48 provided at the rear of the fuselage 10. Can be used from either side of the rear.

2 shows the slide guide mechanism of the media set lever 46. A guide bush 50 is fixed to the body of the media set lever 46, and a slit 51 extending in the longitudinal direction of the machine body 10 is formed in the guide bush 50. As shown in FIG. At a predetermined position of the slit 51, a positioning portion 52 for a resin bearing 54 having an uneven surface is formed of a resin material. A resin bearing 54 provided on the body 10 side is fitted in the slit 51, and the positioning portion 52 is detachably locked to the resin bearing 54. As shown in FIG.

A guide slit 56 is formed in the media setting lever 46 , and a projection 60 of one of the link pieces 58 is slidably fitted in the guide slit 56 , and the other of the link pieces 58 is fixed to the shaft 22 . . When the media set lever 46 moves in the longitudinal direction of the machine body 10 , the protrusion 60 slides along the guide slit 56 , and the link piece 58 swings about the shaft 22 along with this slide. As the link piece 58 swings, the shaft 22 rotates.

1 and 2 show the pressure roller 8 elastically contacting the grid roller 20 with standard pressure. The pressure convex surface 44 of the cam body 42 faces one pressure receiving surface 62 of the pressure spring arm 26 , and the other side of the pressure spring arm 26 is engaged with the convex portion 40 of the multistage pressure pressure knob member 38 . .

In this state, the extension amount of the coil spring 36 is determined, and the tension of the coil spring 36 causes the pressure roller 8 to move toward the grid roller 20 due to the clockwise biasing force about the shaft portion 32 of the pressure arm 30 . elastically contact with standard pressure.
In this embodiment, the position where the media set lever 46 is locked to the resin bearing 54 via the positioning portion 52 is defined as the reference position.

4 and 5 show a state in which the pressure roller 8 is in elastic contact with the grid roller 20 with strong pressure. The pressurizing convex surface 44 of the cam body 42 elastically contacts the other lower surface of the pressurizing spring arm 26 with a predetermined amount of deviation to the right, that is, clockwise, from the normal pressurization, and one of the pressurizing spring arms 26 , is pushed up clockwise by a predetermined amount from the standard state by the convex surface 44 about the shaft 28 . As a result, the amount of extension of the coil spring 36 is determined, and the clockwise urging force around the shaft portion 32 of the pressure arm 30 causes the pressure roller 8 to bounce against the grid roller 20 with a larger pressure than the standard pressure. touch.

In this state, the media set lever 46 is pushed toward the machine body 10 as shown in FIG. Also, the protrusion 60 of the link piece 58 has moved to the upper portion of the guide slit 56 .
6 and 7 show a state in which the pressure roller 8 is in elastic contact with the grid roller 20 in a weak state.

In a state where the positioning portion 52 of the media set lever 46 is held at the normal position on the machine body 10 side via the resin bearing 54, the multistage pressurizing knob member 38 is pulled out one step to the right in the drawing from its original position. , the left and right circular projections (not shown) of the multistage pressure knob member 38 enter the grooves (not shown) for weakening the pressure spring arm 26, and when the multistage pressure knob member 38 is in the forward position, the pressure arm 30 is detachably locked.

In this state, the convex portion 40 of the multi-stage pressurizing knob member 38 is separated from the pressurizing spring arm 26 in FIG. From the state shown in FIG. 1, the pressure spring arm 26 swings counterclockwise about the shaft 28, and as shown in FIG. 6, the tension force of the coil spring 36 on the pressure arm 30 is reduced, and the pressure roller 8 is applied with a weaker pressure than in the standard state. It is in elastic contact with the grid roller 20 .

FIG. 8 shows the raised state of the pressure roller 8 in which the pressure roller 8 is separated from the grid roller 20 . The media set lever 46 is largely pulled out from the machine body 10 side, and the movement of the media set lever 46 causes the shaft 22 to rotate. ing. As a result, the pressure arm 30 swings about the shaft portion 32 in the counterclockwise direction, and the pressure roller 8 is separated from the grid roller 20 .

When the pressure roller 20 is raised, the end of the slit 51 of the media set lever 46 is locked by the resin bearing 54 as shown in FIG. When the pressure roller 8 is raised, the multistage pressure knob member 38 is pulled out from the original position by a predetermined amount, and is locked at the second locking position on the pressure arm 30 side as shown in FIG. , the side surface of the convex portion 40 of the multistage pressurizing knob member 38 abuts against the locking surface 66 formed on the pressurizing base 24, and the pressurizing spring arm 26 swings counterclockwise about the shaft 28. It becomes free to move, and the tensile force of the coil spring 36 on the pressure arm 30 is released. That is, the pressurization is canceled and set.

12 and 13 show a state in which the pressurization cancellation state is held. Even if the media set lever 46 moves to the reference position and the roller raising convex surface 64 of the cam body 42 is separated from the pressure receiving surface of the pressure arm 30 , the tensile force of the coil spring 36 does not act on the pressure arm 30 . Therefore, the pressure arm 30 maintains a state of swinging counterclockwise around the shaft portion 32 due to the rotational torque generated by the weight of one side thereof, and the pressure roller 8 maintains a state of being separated from the grid roller 20. do.

Next, the operation of this embodiment will be described.
First, the operator sets a roll of print media (media) on a roll paper receiver (not shown) on the machine body 10 side, and pulls the media set lever 46 forward (see FIG. 9). ), the pressure roller 8 is separated from the grid roller 20 .

Next, the media wound in a roll state is pulled out and guided between the grid roller 20 and the pressure roller 8 . Before printing, the pressure of the pressure roller 8 against the grid roller 20 is set according to the medium to be used, which state of normal, strong, weak, and canceled is to be used. Note that the setting may be changed after setting the medium.
Next, the media set lever 46 is pushed to lower the pressure roller 8 and press it against the grid roller 20 , so that the media on the media guide 18 is sandwiched between the grid roller 20 and the pressure roller 8 .

Next, the operator connects the external computer and the printer via an interface, and turns on the power of the external computer and the printer. It will be in a standby state waiting for the input of a command from the operator.

Next, the operator operates the external computer device to cause the printer device to start printing the image. As a result, the controller built in the printer device controls the operation of the print head 4 while changing the relative positional relationship between the print head 4 and the medium based on the image data output from the external computer device. Ink droplets are ejected from the nozzles of the print head 4 toward the media on the media guide 18 for printing.

The pressure applied by the pressure roller 8 to the grid roller 20 during printing can be set in multiple stages of normal, strong, and weak. , perform the setting operation before printing. When selecting one of the many pressure rollers 8 that is not to be used, the pressure roller 8 is raised and the multi-stage pressure knob member 38 is largely pulled out to the two-stage locking position. state can be This makes it possible to handle various types of media with different widths.

By providing a structure for adjusting the pressure, the present invention can handle a wide variety of media, and can set a different pressure for each transport location. Therefore, when different types of paper are arranged side by side and transported at the same time, it is possible to transport one side with the normal setting and the other side with the low setting. It is also possible to transport different media at once.
The media used in this case may be roll-shaped media such as paper, cloth, tarpaulin, marking film, etc., or may be provided in the form of plates. When conveying a plate-shaped object, if the media guide 18 can hold the medium flat within a certain range, the conveyance after printing will be smooth, so such a structure may be used.

It should be noted that these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions and replacements can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

2 Front cover 4 Print head 6 Head guide rail 8 Pressure roller 10 Body 12 Maintenance cover 14 Maintenance cover 16 Carriage 18 Media guide 20 Grid roller 22 Shaft 24 Pressure base 26 Pressure spring arm 28 Axis 30 Pressure arm 32 Axis Part 36 Coil spring 38 Multi-stage pressing knob member 40 Convex part 42 Cam body 44 Convex surface 46 Media set lever 48 Handle 50 Guide bush 51 Slit 52 Positioning part 54 Resin bearing 56 Guide slit 58 Link piece 60 Projection 62 Pressure receiving surface 64 Convex surface 66 locking surface

Claims (8)

A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided in the width direction of the recording medium so as to face the grid roller 20, and recording is performed by the rotation of the grid roller 20. A recording medium conveying device for a printer that conveys a medium and prints on the recording medium, and includes a head guide rail 6 installed on the body along the width direction of the recording medium and supported by the body so as to be movable in a predetermined direction. a pressurizing base 24 attached to the head guide rail 6; a shaft body 22 rotatably supported along the head guide rail 6; , a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable around a shaft portion 32; and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22, and the urging force of the urging force applying means to the pressure arms 30 is The biasing force set by the biasing force applying means is changed in multiple steps corresponding to the rotation of the shaft body 22 driven by the movement of the media set lever 46, and the biasing force set by the biasing force applying means is applied in a plurality of steps for each pressurizing arm 30. An urging force changing means is provided for changing the urging force, and the linkage between the shaft body 22 and the pressure arm 30 is cut off so as to be released from each of the pressure arms 30, and the pressure roller 8 rises from the grid roller 20. 1. A recording medium conveying device for a printer, comprising pressurization stop means for maintaining a state. A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided in the width direction of the recording medium so as to face the grid roller 20, and recording is performed by the rotation of the grid roller 20. A recording medium conveying device for a printer that conveys a medium and prints on the recording medium, and includes a head guide rail 6 installed on the body along the width direction of the recording medium and supported by the body so as to be movable in a predetermined direction. a pressurizing base 24 attached to the head guide rail 6; a shaft body 22 rotatably supported along the head guide rail 6; , a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable around a shaft portion 32; and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22, and the urging force of the urging force applying means to the pressure arms 30 is The biasing force imparting means is composed of the cam body 42 fixed to the shaft body 22 and the A pressurizing spring arm 26 rotatably supported on a pressurizing base 24, a multistage pressurizing knob member 38 having a convex portion 40 for locking one eccentric portion of the pressurizing spring arm 26, and the pressurizing The coil spring 36 is mounted between the other eccentric portion of the spring arm 26 and the pressure arm 30, and the position of the pressure convex surface 44 of the cam body 42 with respect to the pressure spring arm 26 1. A recording medium conveying device for a printer, characterized in that the urging force applied to said pressure spring arm 26 is varied. A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided and arranged in the width direction of the recording medium so as to face the grid roller 20 . and print on the recording medium, the head guide rail 6 installed on the machine body along the width direction of the recording medium and the head guide rail 6 movable in a predetermined direction with respect to the machine body A media set lever 46 supported by the machine body, a plurality of pressure bases 24 attached to the head guide rail 6, a shaft 22 rotatably supported along the head guide rail 6, and a pressure roller 8. and a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable about a shaft portion 32, and a direction in which the pressure roller 8 moves toward the grid roller 20 on each of the pressure arms 30. and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22 . An urging force is applied corresponding to the rotation of the shaft body 22 accompanying the movement of the media set lever 46, and the pressure arm 30 is provided with the shaft body 22 and the pressure arm 30. are releasably interrupted, and pressure stopping means is provided for maintaining the state in which the pressure roller 8 is lifted from the grid roller 20, and the biasing force applying means is fixed to the shaft body 22. A multistage pressurizing knob member having a cam body 42, a pressurizing spring arm 26 rotatably supported on the pressurizing base 24, and a convex portion 40 for locking one eccentric portion of the pressurizing spring arm 26. 38 and a coil spring 36 attached between the other eccentric portion of the pressure spring arm 26 and the pressure arm 30, and the pressure spring arm on the pressure convex surface 44 of the cam body 42. 26. A recording medium conveying device for a printer, characterized in that the biasing force applied to said pressure spring arm 26 is changed according to its position with respect to said pressure spring arm 26. A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided in the width direction of the recording medium so as to face the grid roller 20, and recording is performed by the rotation of the grid roller 20. A recording medium conveying device for a printer that conveys a medium and prints on the recording medium, and includes a head guide rail 6 installed on the body along the width direction of the recording medium and supported by the body so as to be movable in a predetermined direction. a pressurizing base 24 attached to the head guide rail 6; a shaft body 22 rotatably supported along the head guide rail 6; , a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable around a shaft portion 32; and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22, and the urging force of the urging force applying means to the pressure arms 30 is The motion converting means is composed of a guide slit 56 formed in the media set lever 46 and a guide slit 56 formed in the media set lever 46. One side is slidably engaged with the guide slit 56 via a protrusion 60, and the other side is composed of a link piece 58 fixed to the shaft body 22. A recording medium conveying device for a printer, characterized in that a link piece (58) swings about said shaft (22), and said shaft (22) is rotated by said swinging of said link piece (58). A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided and arranged in the width direction of the recording medium so as to face the grid roller 20 . and print on the recording medium, the head guide rail 6 installed on the machine body along the width direction of the recording medium and the head guide rail 6 movable in a predetermined direction with respect to the machine body A media set lever 46 supported by the machine body, a plurality of pressure bases 24 attached to the head guide rail 6, a shaft 22 rotatably supported along the head guide rail 6, and a pressure roller 8. and a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable about a shaft portion 32, and a direction in which the pressure roller 8 moves toward the grid roller 20 on each of the pressure arms 30. and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22 . An urging force is applied corresponding to the rotation of the shaft body 22 accompanying the movement of the media set lever 46, and the pressure arm 30 is provided with the shaft body 22 and the pressure arm 30. are releasably interrupted, and the pressurizing roller 8 is provided with a pressure stopping means for maintaining the state in which the pressure roller 8 is lifted from the grid roller 20, and the motion converting means is formed in the media set lever 46. A guide slit 56 and a link piece 58 slidably engaged with the guide slit 56 via a protrusion 60 on one side and fixed to the shaft body 22 on the other side. A recording medium conveying device for a printer, characterized in that said link piece (58) swings about said shaft (22) according to a position relative to said shaft (22), and said shaft (22) is rotated by said swinging of said link piece (58). . A recording medium is nipped between a grid roller 20 connected to a drive system and a plurality of pressure rollers 8 which are divided in the width direction of the recording medium so as to face the grid roller 20, and recording is performed by the rotation of the grid roller 20. A recording medium conveying device for a printer that conveys a medium and prints on the recording medium, and includes a head guide rail 6 installed on the body along the width direction of the recording medium and supported by the body so as to be movable in a predetermined direction. a pressurizing base 24 attached to the head guide rail 6; a shaft body 22 rotatably supported along the head guide rail 6; , a pressure arm 30 supported by each of the pressure bases 24 so as to be swingable around a shaft portion 32; and motion converting means for converting the movement of the media set lever 46 into the rotational motion of the shaft 22, and the urging force of the urging force applying means to the pressure arms 30 is The biasing force set by the biasing force applying means is changed in multiple steps corresponding to the rotation of the shaft body 22 driven by the movement of the media set lever 46, and the biasing force set by the biasing force applying means is applied in a plurality of steps for each pressurizing arm 30. An urging force changing means is provided for changing the urging force, and the urging force changing means is configured by slidably arranging a multi-stage pressure knob member 38 on the pressure arm 30 via a guide portion, and the multi-stage pressure knob member 38 is provided. 38 is provided with a convex portion 40, a reference position where the multi-stage pressurizing knob member 38 is pushed farthest in the depth direction of the guide portion, a 1-step pull position where the guide portion is pulled out by a predetermined amount from the reference position, and the 1-step pull. It can be detachably locked at each position of the two-step pull position pulled out by a predetermined amount from the position. , the projection 40 is retracted by a predetermined amount from the position at which the pressure spring arm 26 is retained at the first-stage pulled position, and at the second-stage pulled position, the projection 40 is A recording medium conveying device for a printer, wherein the pressure spring arm 26 is greatly retracted from a position at which the pressure spring arm 26 is locked so that the pressure spring arm 26 is free to rotate in one direction. A positioning portion that allows the media set lever 46 to slide in the longitudinal direction of the machine body along a guide provided on the machine body, and that detachably locks the media set lever 46 at a reference position on the side of the media set lever 46. 52 is provided, and the position of the media set lever 46 with respect to the machine body is set to the reference position, the push-in position that is moved a predetermined amount to the back of the machine body from the reference position, and the pulled-out position that is pulled out to the outside of the machine body from the reference position. When both the media set lever 46 and the multistage pressurizing knob member 38 are at their reference positions, the force of the coil spring 36 causes the pressurizing roller 8 to correspond to the grid roller 20 and the force of the coil spring 36. When the media set lever 46 is at the pushed position and the multistage pressurizing knob member 38 is at the reference position, the convex surface 44 of the cam body 42 fixed to the shaft body 22 presses against the pressurizing force. The eccentric portion of the spring arm 26 is pushed up, the pressing force of the pressure roller 8 against the grid roller 20 is set to a value larger than the standard pressure, the media set lever 46 is at the reference position, and the multi-stage pressurization is performed. When the pressure knob member 38 is at the first stage pull position, the convex portion 40 retreats by a predetermined amount from the position where the eccentric portion of the pressure spring arm 26 is engaged, and the pressure force of the pressure roller 8 against the grid roller 20 is applied. 7. A recording medium conveying device for a printer according to claim 6, wherein the setting is weak. When the media set lever 46 is at the pulled-out position and the pressure roller 8 is separated from the grid roller 20, when the multi-stage pressure knob member 38 is positioned at the second-stage pulled position, the media is set. 7. A state in which the movement of the lever 46 is not transmitted to the pressure arm 30 and the pressure roller 8 is separated from the grid roller 20 is maintained. A recording medium transport device for a printer.

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