JP2005297297A - Carriage transport device, recording device, and liquid ejecting device - Google Patents

Abstract

Even when a carriage conveyance belt expands or contracts due to environmental changes or the like, a stable carriage reciprocation is possible, and a load applied to a drive motor, a main frame, and the like is reduced as much as possible.
A drive pulley 31 connected to an output shaft of a drive motor 30 and provided near one end of a recording apparatus main body 2, a driven pulley 32 provided at a position facing the drive pulley 31, and between the pulleys 31, 32. Carriage transport belt 8 wound with a relatively weak tension setting, pulley holder 33 for holding driven pulley 32, biasing means 34 for biasing pulley holder 33 in belt tension direction B, and belt slack direction of pulley holder 33 And a movement restricting unit 45 that restricts movement to C.
[Selection] Figure 3

Description

  The present invention relates to a carriage conveyance device having a carriage conveyance belt that reciprocates a carriage on which a recording head is mounted in a main scanning direction, and a recording apparatus including the carriage conveyance device.

  Furthermore, the present invention relates to a liquid ejecting apparatus such as an ink jet recording apparatus that ejects (ejects) a liquid such as ink from a head thereof and performs recording (adhering liquid) on a recording material (liquid ejecting material). The present invention relates to a carriage conveying device provided in a liquid ejecting apparatus.

  Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that records ink on a recording material by discharging ink from the recording head. It is used to include a device for ejecting a liquid corresponding to the application from a liquid ejecting head corresponding to the recording head to a liquid ejecting material corresponding to a recording material and attaching the liquid to the liquid ejecting material.

  In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

  Hereinafter, an ink jet printer will be described as an example of an ink jet recording apparatus or a liquid ejecting apparatus. Ink jet printers are provided with a carriage transport device including a carriage transport belt as transport means for a carriage on which a recording head is mounted. In order to achieve a stable reciprocation of the carriage, an urging means for urging the carriage conveying belt in the belt tension direction is provided as shown in Patent Documents 1 to 3 below.

  In Patent Document 1, a plate spring is used as an urging means, and tension adjustment of the carriage conveyance belt is performed by a pressing force of a plate spring that comes into contact with the back surface of the carriage conveyance belt. In Patent Document 2, a tension coil spring is used as an urging means, and tension adjustment of the carriage transport belt is performed by a tension force of a tension coil spring provided at a joint portion with the carriage. In Patent Document 3, a compression coil spring is used as the urging means, and tension adjustment of the carriage conveyance belt is performed by amplifying the urging force of the compression coil spring by using a “lever” and moving the driven pulley. . 6 uses a compression coil spring 200 as the urging means, and adjusts the tension of the carriage conveyance belt 202 by moving the driven pulley 201 in the belt tension direction by the urging force of the compression coil spring 200, as in Patent Document 3 below. A conventional carriage transport device 203 is shown.

  On the other hand, as a recent trend of inkjet printers, an increase in the size of the carriage and an increase in the operation speed of the carriage have been attempted. In order to obtain the stability of the operation speed of the carriage under such conditions, it is necessary to increase the tension of the carriage conveyance belt. However, in the configuration disclosed in the following Patent Documents 1 to 3 and the configuration of the conventional carriage conveyance device 203 shown in FIG. 6, if the tension of the carriage conveyance belt 202 is simply increased, the load for operating the carriage particularly at the time of starting. Increases, causing problems such as heat generation of the drive motor.

  Therefore, it is necessary to select a drive motor that has higher performance and can withstand the load. In addition, when the tension of the carriage conveyance belt 202 increases, an unreasonable force is applied to the main frame 205 that supports the driving pulley or the driven pulley 201 (not shown) via the rotation shaft 204, and the main frame 205 is bent and deformed. Therefore, there is a need to increase the rigidity of the main frame 205, such as increasing the thickness of the main frame 205.

  In order to eliminate the problems associated with increasing the tension of the carriage conveyance belt 202 described above, a carriage conveyance device 206 configured as shown in FIG. 7 has also been proposed. In this carriage transport device 206, the tension of the carriage transport belt 202 is set to a low value within a range that does not hinder the operation of the carriage to determine the position of the driven pulley 201. It is fixed by screwing. Therefore, after the pulley holder 207 is fixed, the compression coil spring 200 does not function as a tension adjusting unit for the carriage conveyance belt 202. Therefore, the carriage conveyance is caused by a minute extension of the carriage conveyance belt 202 or a slight deflection of the main frame 205 or the like. This corresponds to a change in tension of the belt 202.

  However, the spring constant of the carriage conveyance belt 202 is 10 to 30 times as large as the spring constant of the compression coil spring 200, and thus is easily affected by environmental factors such as temperature changes. Therefore, when the carriage conveyance belt 202 is extended due to a temperature change or the like, the operation speed of the carriage becomes unstable. Although illustration is omitted, when the tension of the carriage conveyance belt 202 is set low and the pulley holder 207 is released, the carriage conveyance belt 202 is contracted due to a temperature change or the like as follows. Problems arise. Since the load when driving the carriage increases, an acceleration change occurs when the carriage is started, and after the compression coil spring 200 having a small spring constant is first compressed, the carriage transport belt 202 having a large spring constant starts to move. Therefore, the carriage may suddenly move or abnormal noise may occur.

JP-A-6-135085 JP 2001-71577 A Japanese Patent Laid-Open No. 2003-19840

  Therefore, the present invention was devised in view of the background art and the existence of the problems of the background art. Even when the carriage conveyance belt expands or contracts due to an environmental change or the like, a stable carriage can be obtained. It is an object of the present invention to provide a carriage transport device that can reciprocate and that can reduce the load applied to a drive motor, a main frame, and the like as much as possible, a recording device including the carriage transport device, and the like. .

  In order to solve the above problems, a carriage transport apparatus according to a first aspect of the present invention is a carriage transport apparatus including a carriage transport belt that reciprocates a carriage on which a recording head is mounted in a main scanning direction, The carriage conveying device is connected to the output shaft of the drive motor, and is provided near a drive pulley provided near one end of the recording apparatus main body and the other end of the recording apparatus main body at a position facing the drive pulley. A driven pulley, a carriage transport belt wound with a relatively weak tension between the driving pulley and the driven pulley, a pulley holder for holding the driven pulley, and a biasing means for biasing the pulley holder in the belt tensioning direction. And a movement restricting portion that restricts movement of the pulley holder in the belt slack direction.

  According to the first aspect of the present invention, since the tension setting of the carriage conveyance belt is set to be weak, the load when operating the carriage at the time of start-up is reduced, the carriage moves rapidly, and the drive motor generates heat. And the problem of the deformation of the main frame does not occur. In addition, when the carriage transport belt is later extended due to factors such as environmental changes, the tension of the carriage transport belt is adjusted by the biasing force of the biasing means. Since the movement in the belt slack direction is restricted, the load applied to the carriage at the time of start-up is reduced, so that sudden movement of the carriage is also prevented.

In the carriage conveyance device according to a second aspect of the present invention, in the first aspect, the tension setting of the carriage conveyance belt is a tension sufficient to perform a stable operation of the carriage in an initial state, and It is characterized in that it is set so as not to include a boosting component added to cope with a change or the like.
According to the second aspect of the present invention, the minimum tension that can ensure a stable operation in the initial state of the carriage is set, so that the load applied to the drive motor and the main frame is also minimized. The problem of heat generation and bending deformation of the main frame does not occur.

According to a third aspect of the present invention, there is provided the carriage conveyance device according to the first or second aspect, wherein the pulley holder includes a holder portion in which an engagement groove for receiving the rotation shaft of the driven pulley is formed, and a main body in the recording apparatus main body. A guide portion having a guide hole for receiving the spring seat plate raised from the frame; and an abutting portion that comes into contact with the movement restricting portion; and the urging means is contracted between the holder portion and the spring seat plate. It is characterized by that.
According to the third aspect of the present invention, the pulley holder can slide a predetermined stroke in the main scanning direction by the guiding action in the guide portion. Further, since the biasing means is provided between the main frame provided in a fixed state and the pulley holder provided in a slidable state as described above, the driven pulley is always biased in the belt tension direction, Even when the carriage conveyance belt is extended due to an environmental change or the like, the tension of the carriage conveyance belt is maintained at an appropriate value.

In the carriage conveyance device according to a fourth aspect of the present invention, in the first to third aspects, the movement restricting portion is constituted by a stopper plate fixed to the main frame in the recording apparatus main body. The stopper plate is provided with a fixed position adjustment elongated hole for restricting movement of the pulley holder in the belt slack direction in a range of 0 to 0.3 mm.
According to the fourth aspect of the present invention, abrupt movement of the carriage can be prevented, and in particular, if the movement amount of the pulley holder is set to be large within the setting range, the load applied to the carriage at the start of the carriage is compressed by the urging means. It can also be reduced by deformation.

A recording apparatus according to a fifth aspect of the present invention is a recording apparatus comprising: a carriage having a recording head mounted thereon; and a carriage conveying apparatus having a carriage conveying belt that reciprocates the carriage in the main scanning direction. The conveyance device is a carriage conveyance device according to any one of the first to fourth aspects.
According to the fifth aspect of the present invention, even when the carriage conveyance belt expands or contracts due to an environmental change or the like, stable carriage reciprocation is possible, and the load applied to the drive motor, the main frame, etc. is as much as possible. It is possible to provide a recording apparatus including a carriage conveyance device that can be reduced in size.

  A liquid ejecting apparatus according to a sixth aspect of the present invention is a liquid ejecting apparatus including a carriage on which a liquid ejecting head is mounted and a carriage transporting device having a carriage transporting belt that reciprocates the carriage in the main scanning direction. The carriage conveying device is connected to the output shaft of the drive motor and is provided near one end of the liquid ejecting apparatus main body, and near the other end of the liquid ejecting apparatus main body at a position facing the drive pulley. A driven pulley provided on the carriage, a carriage conveying belt wound with a relatively weak tension between the driving pulley and the driven pulley, a pulley holder for holding the driven pulley, and a biasing force for biasing the pulley holder in the belt tension direction. And a movement restricting portion for restricting movement of the pulley holder in the belt slack direction. That.

  Hereinafter, a carriage conveying apparatus according to the present invention and a recording apparatus which is an example of a liquid ejecting apparatus including the carriage conveying apparatus will be described. First, an ink jet printer is taken up as the best mode for carrying out the recording apparatus, and the outline of the entire configuration will be described with reference to the drawings. FIG. 1 is a perspective view showing the outline of the internal structure of the ink jet printer, and FIG. 2 is a side sectional view showing the outline of the internal structure of the ink jet printer.

  The ink jet printer 100 is provided with a main frame 3 in a fixed state with respect to a liquid ejecting apparatus main body and a printer main body 2 which is an example of a recording apparatus main body. The main frame 3 is provided with various members constituting a conveyance path of a recording material P (hereinafter also simply referred to as a paper P) which is an example of a liquid ejection material, including the carriage conveyance device 1 of the present invention. It is installed.

  A feeding tray 4 is provided on the rear side of the printer body 2 as shown in FIG. Further, the feeding tray 4 is provided with a fixed edge guide 5 located on the right side in FIG. 1 and a movable edge guide 6 located on the left side in FIG. The sheet P placed on the feeding tray 4 is pulled out by a pickup roller (not shown) while the left and right edges are guided by these two edge guides 5 and 6, and the feeding roller and separating means (not shown) are pulled out. Only the uppermost sheet P is selected by a retard roller or the like as an example, and is fed toward the transport roller 19.

  The fed paper P is sandwiched between a transport roller 19 constituted by a transport drive roller 19a and a transport driven roller 19b, and is orthogonal to the main scanning direction X by the drive rotation of the transport drive roller 19a. It is transported in the sub-scanning direction Y by a predetermined transport amount. Among them, a plurality of driven rollers 19b for conveyance are provided, and are individually supported by a roller holder 18 so as to be driven to rotate. Further, the roller holder 18 constantly receives a biasing force from a biasing means (not shown), whereby the transport driven roller 19b is always kept in a nip state in pressure contact with the transport drive roller 19a.

  The sheet P conveyed while being pinched by the conveying roller 19 is pressed from above by an auxiliary pressing roller and a pressing plate (not shown) located in the vicinity of the conveying driven roller 19b and downstream in the sheet conveying direction A, and lifts up. In a state in which this is prevented, the recording head 13 is guided to the recording position 26 below. The paper P guided to the recording position 26 is detected by a detection device (not shown) to detect the passage timing of the paper P, recording is started, and the carriage 7 and the paper P are operated to cover almost the entire recording surface of the paper P. The desired recording is performed.

  The carriage 7 is equipped with a recording head 13 which is an example of a liquid ejecting head that performs recording by ejecting (ejecting) ink, which is an example of liquid, onto the paper P or the like. Further, an ink cartridge 11 is mounted on the carriage 7, and the carriage 7 can reciprocate in the main scanning direction X by receiving a driving force from the carriage conveyance device 1 of the present invention.

  A platen 28 that defines a platen gap PG between the head surface of the recording head 13 and the paper P or the like is provided below the recording head 13 so as to face the recording head 13. Note that the platen gap PG is an extremely important element in executing high-precision recording, and is appropriately adjusted by the adjusting device 1 of the present invention in accordance with a change in the thickness of the paper P. Yes. The operation of conveying the paper P or the like between the carriage 7 and the platen 28 in the sub-scanning direction Y by a predetermined conveyance amount and the paper P or the like from the recording head 13 while the recording head 13 is reciprocated once in the main scanning direction X. In this way, recording is performed on the paper P or the like by alternately repeating the operation of ejecting ink.

  A discharge roller 20, which is an example of a liquid ejecting material discharge unit configured by a discharge drive roller 20 a and a discharge jagged roller 20 b, is provided downstream of the recording head 13 in the sheet conveyance direction A. The sheet P discharged by the sheet 20 is discharged onto a placement surface 51 on a discharge stacker 50, which is an example of a liquid injection material receiving section located further downstream.

  The discharging jagged roller 20b is a toothed roller having a plurality of teeth on the outer periphery thereof, and is supported by a roller holder for the discharging jagged roller so as to be freely rotatable. An auxiliary jagged roller 22 is provided in the vicinity of the discharge jagged roller 20 b, and the paper P is pressed slightly downward by the auxiliary jagged roller 22. Further, the transport driven roller 19b is disposed at a position slightly downstream of the transport drive roller 19a, and the discharge serpentine roller 20b is disposed at a position slightly upstream of the discharge drive roller 20a. It is arranged on the side.

  With such a configuration, the sheet P is in a curved state commonly called “back-sliding” that slightly protrudes downward between the transport roller 19 and the discharge roller 20 and faces the recording head 13. The sheet P at the position to be pressed is pressed against the platen 28, so that the sheet P is prevented from being lifted and recording is executed normally. The auxiliary serrated roller 22 is constituted by a toothed roller like the discharge serrated roller 20b, and is pivotally supported by a roller holder for the auxiliary serrated roller.

[Example]
Next, the configuration of the carriage conveyance device 1 according to the present invention applied to the ink jet printer 100 will be described in more detail. FIG. 3 is an enlarged perspective view showing a tension generation unit in the carriage conveyance device, and FIG. 4 is an enlarged front view of the tension generation unit showing a state in which the pulley holder is in contact with the movement restricting unit. FIG. 5 is an enlarged front view of the tension generating unit showing a state where a gap is formed between the pulley holder and the movement restricting unit.

  The carriage conveying device 1 is connected to a drive motor 30 as a drive source, an output shaft of the drive motor 30, a drive pulley 31 provided near one end of the printer main body 2, and a position facing the drive pulley 31. A driven pulley 32 provided near the other end of the printer main body 2, a carriage conveyance belt 8 wound between the driving pulley 31 and the driven pulley 32 and connected to the carriage 7, and a main scanning direction of the carriage 7 A carriage guide shaft 9 for guiding the movement of X, a pulley holder 33 for holding the driven pulley 32, a compression coil spring 34 as an example of a biasing means for biasing the pulley holder 33 in the belt tension direction B, and a belt slack of the pulley holder 33 And a stopper plate that is an example of a movement restricting portion that restricts movement in the direction C.

  Among these, the carriage transport belt 8 is an endless belt-like toothed belt generally called a timing belt, in which rectangular teeth are formed on one side, and on the outer peripheral surfaces of the driving pulley 31 and the driven pulley 32, Irregularities that mesh with the teeth of the carriage conveyance belt 8 are formed. As one characteristic configuration of the present invention, the tension setting of the carriage conveyance belt 8 is set relatively weak. Specifically, the tension setting of the carriage conveyance belt 8 is a tension that is sufficient to enable the carriage 7 to perform a stable operation in an initial state such as at the time of shipment, and is added to cope with an environmental change after the drought. The setting does not include the increment. Incidentally, the load applied to the drive motor 30 and the main frame 3 is greatly reduced by reducing the tension of the carriage conveyance belt 8 in this way.

  The pulley holder 33 includes a holder portion 38 in which an engagement groove 37 for receiving the rotating shaft 36 of the driven pulley 32 and a guide portion 41 in which a guide hole 40 for receiving a spring seat plate 39 raised from the main frame 3 is formed. And a contact portion 42 that contacts the stopper plate 35. The compression coil spring 34 is contracted between the holder portion 38 and the spring seat plate 39.

  The holder portion 38 includes two holding blade plates 43 provided on the front side and the rear side of the driven pulley 32 and a block-shaped spring receiving portion 44 provided on the base end portion of the two holding blade plates 43. And. At the center of the end of the two holding blades 43 on the driven pulley 32 side, the above-described engagement groove 37 having a U-shape inclined 90 ° counterclockwise is formed. Note that the above-described rotating shaft 36 that rotatably supports the driven pulley 32 is engaged with the engaging groove 37 from the outside.

  The guide portion 41 is configured by engaging a substantially rectangular guide hole 40 with a part of the pulley holder 33, and by engaging with a spring seat plate 39 raised from the main frame 3, the pulley holder 33. The belt can be moved in the belt tension direction B or in the belt slack direction C. Therefore, the pulley holder 33 is not fixed to the main frame 3. Further, the contact portion 42 is constituted by an end surface of the pulley holder 33 on the side of the belt slack direction C.

  The stopper plate 35 is a flat plate member whose end on the belt tension direction B side abuts on the abutting portion 42 in the pulley holder 33 described above, and serves as a movement regulating portion 45 that regulates the movement of the pulley holder 33 in the belt slack direction C. It has become. In the vicinity of the movement restricting portion 45, a receiving hole for a fixing screw 46 used when the stopper plate 35 is fixed to the main frame 3 is provided. The receiving hole is a fixed position adjusting elongated hole 47 that allows the stopper plate 35 to move in the belt tension direction B or the belt slack direction C. Also, a guide slot 48 is formed in a portion of the stopper plate 35 near the end in the belt slack direction C side so as to engage with an engaging convex portion 49 protruding from the main frame 3 side. . Note that the amount of movement of the pulley holder 33 that can be adjusted by the fixed position adjusting long hole 47 in the belt slack direction C is set in a range of about 0 to 0.3 mm, and prevents sudden movement of the carriage 7 that occurs at the start. Yes.

  Next, the operation mode of the carriage conveyance device 1 configured as described above will be described separately for (1) an initial state, (2) when the carriage conveyance belt is extended, and (3) when the carriage conveyance belt is contracted. .

(1) Initial state This is a case where the tension of the carriage transport belt 8 is reset, for example, upon shipment or when repaired. In this case, since the tension of the carriage transport belt 8 is set to be weak as described above, the load applied to the drive pulley 31, the driven pulley 32, the drive motor 30, the rotary shaft 36, the main frame 3, and the like becomes extremely small. ing. Accordingly, there is no problem of heat generation of the drive motor 30 or bending of the main frame 3. In addition, since the stability of the operation of the carriage 7 is ensured, the carriage 7 smoothly reciprocates in the main scanning direction X while being guided by the carriage guide shaft 9.

(2) When the carriage transport belt is stretched For example, when the carriage transport belt 8 is stretched and tension is decreased due to environmental factors such as temperature changes or long-term use. In this case, since the pulley holder 33 moves in the belt tension direction B by the urging force of the compression coil spring 34, the driven pulley 32 also moves in the same direction, and the tension of the carriage transport belt 8 is adjusted to an appropriate state. Accordingly, the stability of the operation of the carriage 7 is maintained, and the carriage 7 smoothly reciprocates in the main scanning direction X while being guided by the carriage guide shaft 9.

(3) When the carriage transport belt is contracted For example, when the carriage transport belt 8 is hardened due to environmental factors such as temperature changes, or has been used for many years, or the tension is decreased due to contraction. In this case, the pulley holder 33 tries to move in the belt slack direction C, but the amount of movement of the pulley holder 33 is set to a very small value of 0 to 0.3 mm by contacting the stopper plate 35. Accordingly, the rapid movement of the carriage 7 that occurs at the start is prevented, and no abnormal noise is generated.

[Other embodiments]
The carriage conveyance device according to the present invention and the recording apparatus equipped with the carriage conveyance device are basically configured as described above, but the partial configuration is changed within the scope not departing from the gist of the present invention. Of course, it is possible to omit or omit them. For example, the compression coil spring 34 used as the urging means combines different types of springs so that the urging force or the deformation stroke is different between when the pulley holder 33 moves in the belt tension direction B and when it moves in the belt slack direction C. It is also possible to use other urging means such as an air damper. Along with this, it is also possible to adjust the adjustment amount of the fixed position adjustment long hole 47 as appropriate, and by attaching a separate braking device on the stopper plate 35 side, the movement amount of the pulley holder 33 in the belt slack direction C can be reduced. It is also possible to regulate it.

The perspective view which shows the outline of the internal structure of an inkjet printer. FIG. 2 is a side sectional view showing an outline of the internal structure of the ink jet printer. The perspective view which expands and shows the tension | tensile_strength production | generation part in a carriage conveying apparatus. The enlarged front view of the tension | tensile_strength production | generation part which shows the state which the pulley holder contact | abutted to the movement control part. The enlarged front view of the tension | tensile_strength production | generation part which shows the state in which the clearance gap is formed between the pulley holder and the movement control part. The perspective view which expands and shows the tension | tensile_strength production | generation part in the conventional carriage conveyance apparatus. The perspective view which expands and shows the tension | tensile_strength production | generation part in the other conventional carriage conveying apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Carriage conveyance apparatus, 2 Printer main body (recording apparatus main body), 3 Main frame, 4 Feeding tray, 5 Fixed edge guide, 6 Movable edge guide, 7 Carriage, 8 Carriage conveyance belt, 9 Carriage guide shaft, 11 Ink cartridge ,
13 Recording head, 18 Roller holder (conveying driven roller), 19 Conveying roller, 19a Conveying driving roller, 19b Conveying driven roller, 20 Discharging roller,
20a discharge driving roller, 20b driven roller for discharge, 22 auxiliary serrated roller,
26 recording position, 28 platen, 30 drive motor, 31 drive pulley,
32 driven pulley, 33 pulley holder, 34 compression coil spring (biasing means),
35 stopper plate (movement restricting portion), 36 rotating shaft, 37 engaging groove, 38 holder portion,
39 Spring seat plate, 40 guide hole, 41 guide portion, 42 abutting portion, 43 holding blade plate,
44 spring receiving portion, 45 movement restricting portion, 46 fixing screw, 47 fixing position adjusting slot,
48 guide long hole, 49 engagement convex part, 50 discharge stacker, 51 mounting surface,
100 Inkjet printer (recording device), P paper (recording material), X main scanning direction, Y sub-scanning direction, PG platen gap, A paper transport direction, B belt tension direction,
C Belt slack direction

Claims (6)

A carriage conveyance device including a carriage conveyance belt that reciprocates a carriage on which a recording head is mounted in a main scanning direction,
The carriage transport device is connected to an output shaft of a drive motor and is provided near a driving pulley provided near one end of the recording apparatus main body and at the other end of the recording apparatus main body at a position facing the driving pulley. Driven pulley, a carriage transport belt wound by a relatively weak tension setting between the driving pulley and the driven pulley, a pulley holder for holding the driven pulley, and a biasing means for biasing the pulley holder in the belt tension direction And a movement restricting portion that restricts movement of the pulley holder in the belt slack direction.   2. The tension setting of the carriage conveyance belt according to claim 1, wherein the tension setting is sufficient to allow the carriage to perform a stable operation in an initial state, and does not include an increase in force added to cope with an environmental change after the start. A carriage conveying device characterized by being set.   3. The guide according to claim 1, wherein the pulley holder has a holder portion in which an engagement groove for receiving the rotation shaft of the driven pulley is formed, and a guide hole for receiving the spring seat plate raised from the main frame in the recording apparatus main body. And a contact portion that contacts the movement restricting portion, and the biasing means is contracted between the holder portion and the spring seat plate.   4. The movement restricting portion according to claim 1, wherein the movement restricting portion is configured by a stopper plate fixed to a main frame in the recording apparatus main body, and the pulley holder moves in the belt slack direction. A carriage transport device characterized in that a fixed position adjustment slot is provided to regulate the angle within a range of 0 to 0.3 mm. A recording apparatus comprising a carriage on which a recording head is mounted and a carriage conveyance device having a carriage conveyance belt that reciprocates the carriage in the main scanning direction,
The recording apparatus according to claim 1, wherein the carriage conveyance device is the carriage conveyance device according to claim 1. A liquid ejecting apparatus including a carriage on which a liquid ejecting head is mounted and a carriage transport device having a carriage transport belt that reciprocates the carriage in the main scanning direction,
The carriage transport device is connected to an output shaft of a drive motor and is provided near one end of the liquid ejecting apparatus main body, and near the other end of the liquid ejecting apparatus main body at a position facing the drive pulley. A driven pulley provided, a carriage conveying belt wound by a relatively weak tension setting between the driving pulley and the driven pulley, a pulley holder for holding the driven pulley, and a bias for biasing the pulley holder in the belt tension direction A liquid ejecting apparatus comprising: means and a movement restricting portion that restricts movement of the pulley holder in the belt slackening direction.

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