JP2003266850A - Carriage fitting device and recording apparatus fitted therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control lowering of the quality of a recorded image by reducing minute vibration of a carriage and deflection of a carriage guide shaft without fixing the vicinity of middle part of a carriage guide shaft supported by both ends of a recording apparatus. <P>SOLUTION: The carriage 62 is pivoted on the carriage guide shaft 61 slidably on a slide surface 11 by a bearing part 62a. The carriage guide shaft 61 is connected to a frame 2 by a middle support member 21. As for the middle support member 21, one end side is supported vertically oscillatably on the oscillation part 23 of the frame 2, and the other end side is supported on the carriage guide shaft 61 slidably on a slide surface 12 around the carriage guide shaft 61. A coil spring 22 is set between the carriage guide shaft 61 and the frame 2, and the middle support member 21 is inserted into the coil spring 22. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation of ejecting ink from a recording head onto a recording paper while reciprocating a carriage having a recording head in the main scanning direction, and a predetermined conveyance of the recording paper in the sub-scanning direction. A carriage mounting device that pivotally reciprocally moves a carriage of a recording device that performs recording on a recording sheet by alternately repeating the operation of conveying by a quantity, and a recording device including the carriage mounting device. Regarding

[0002]

2. Description of the Related Art Generally, a recording apparatus such as an ink jet type recording apparatus, which ejects ink from a recording head to a recording paper by reciprocating a carriage having a recording head, reciprocates in the main scanning direction. A rotational driving force of a motor is transmitted to a carriage movably supported by a carriage guide shaft by an endless belt or the like, and the carriage reciprocates in the main scanning direction.

In the recording apparatus having such a structure, when the carriage reciprocates while being supported by the carriage guide shaft, the play between the carriage bearing portion with respect to the carriage guide shaft and the carriage guide shaft is generated. A slight vibration occurs in the carriage due to factors such as sticking and frictional resistance. Further, since the carriage guide shaft is a long guide shaft in the main scanning direction, when the rotational drive force of the motor is transmitted to the carriage, the rotational drive force or the like causes the carriage guide shaft to slightly bend.

Conventionally, the slight vibration of the carriage and the slight bending of the carriage guide shaft hardly affect the recording image quality. However, with the recent increase in image quality of ink jet recording apparatuses, the effect thereof is becoming non-negligible, and when ink is ejected from the recording head due to the slight vibration of the carriage and the slight bending of the carriage guide shaft. In addition, the ink landing position on the recording paper may be slightly displaced, and the recording image quality may be deteriorated.

As one example of the prior art for preventing such vibration of the carriage and bending of the carriage guide shaft, in addition to both ends of the carriage guide shaft, the vicinity of the central portion of the carriage guide shaft is supported by the frame of the recording apparatus. Those fixed via members are known. Since the vicinity of the central portion of the carriage guide shaft is fixed to the frame of the recording device via the intermediate supporting member, when the carriage reciprocates as compared with the carriage guide shaft in which only both ends are supported. The generated vibration can be reduced and the amount of bending of the carriage guide shaft can be reduced.

[0006]

By the way, in such a recording apparatus, by adjusting the heights of both ends of the carriage guide shaft, the distance between the head surface of the recording head and the recording surface of the recording material is adjusted in advance. It is necessary to adjust the so-called PG (paper gap) to a specified interval. Therefore, after adjusting the height of the carriage guide shaft so that the PG has a prescribed interval, the vicinity of the central portion of the carriage guide shaft is fixed to the frame of the recording apparatus via the intermediate supporting member. Therefore, if the carriage guide shaft is fixed to the frame or the like of the recording apparatus near the central portion after the PG adjustment, the adjusted PG may be displaced.

Further, since the carriage guide shaft is fixed near the central portion of the carriage guide shaft while being supported at both ends, the carriage guide shaft may be bent and fixed in a warped state. The reciprocal movement of the carriage pivotally supported by the carriage guide shaft may be hindered.

Further, in recent years, in addition to recording paper such as plain paper, a recording device capable of performing recording on a thick paper or a tray loaded with a CD-R has appeared. Such a recording apparatus moves the carriage up and down by moving the carriage guide shaft up and down so that the PG has a specified interval even when recording is performed on a recording material having a constant thickness. The configuration is such that the PG can be changed according to the thickness of the recording material. Therefore, even when recording is performed on a thick recording material, the specified PG
It is possible to prevent the deterioration of the recording image quality and the contact of the recording surface of the recording material with the head surface due to the PG being narrower than the specified interval.

However, since the carriage guide shaft is configured to move up and down, as described above, the vicinity of the central portion of the carriage guide shaft can be fixed to the frame or the like of the recording apparatus via the intermediate support member or the like. Can not. Therefore, there remains the problem that the slight vibration of the carriage and the bending of the carriage guide shaft described above occur.

The present invention has been made in view of such a situation, and an object thereof is to record a carriage guide shaft supported by a recording device at both ends by a center support member or the like in the vicinity of its central portion. It is intended to reduce minute vibrations of the carriage and bending of the carriage guide shaft without fixing to the frame of the apparatus, thereby reducing deterioration of recording image quality.

[0011]

In order to achieve the above object, the invention according to claim 1 of the present application is such that ink is transferred from a recording head to recording paper while reciprocating a carriage carrying the recording head in the main scanning direction. The operation of ejecting the recording paper and the operation of carrying the recording paper in the sub-scanning direction by a predetermined carrying amount are alternately repeated to reciprocate the carriage of the recording device that executes recording on the recording paper in the main scanning direction. A carriage mounting device for movably supporting the carriage, the carriage guide shaft having both ends supported by the recording device body, and the carriage guide shaft disposed between the carriage guide shaft and the recording device body. A carriage mounting device, comprising: a vibration absorbing unit formed of an elastic body capable of absorbing shaft vibration.

As described above, since the vibration absorbing means by the elastic body capable of absorbing the vibration of the carriage guide shaft is disposed between the vibrating carriage guide shaft and the non-vibrating recording apparatus main body, the carriage guide shaft. The vibration can be absorbed and the vibration can be suppressed. Therefore, it is possible to reduce the slight vibration of the carriage and the bending of the carriage guide shaft.

Thus, according to the carriage guide shaft mounting device of the present invention, it is possible to absorb the vibration of the carriage guide shaft disposed between the carriage guide shaft and the recording apparatus main body. Since the body can reduce the minute vibration of the carriage and the bending of the carriage guide shaft, the carriage guide shaft supported by the recording device at both ends is provided with an intermediate support member or the like in the vicinity of the central portion of the recording device. There is an effect that it is possible to reduce the deterioration of the recording image quality due to the slight vibration of the carriage and the bending of the carriage guide shaft without being fixed to the frame.

According to a second aspect of the present invention, in the first aspect, the vibration absorbing means is arranged between the vicinity of the central portion between both ends of the carriage guide shaft and the recording apparatus main body. The carriage mounting device is characterized in that

Since the vibration of the carriage guide shaft supported at both ends is considered to be the largest in the vicinity of the central portion, the vibration absorbing means is disposed at that portion to further enhance the vibration absorbing effect. You can

Thus, according to the carriage guide shaft mounting device of the present invention as defined in claim 2, in addition to the effect of the invention of claim 1, the central portion between both ends of the carriage guide shaft is provided. By disposing the vibration absorbing means between the vicinity and the main body of the recording apparatus, the vibration absorbing effect can be further enhanced, so that the minute vibration of the carriage can be effectively reduced. can get.

According to a third aspect of the present invention, there is provided the carriage mounting device according to the first or second aspect, which is provided with a deflection amount regulation means for regulating the deflection amount of the carriage guide shaft.

According to the carriage guide shaft mounting device of the third aspect of the present invention, in addition to the effect of the invention of the first or second aspect of the present invention, the deflection of the carriage guide shaft is prevented by the deflection amount regulating means. Since it can be regulated, the effect that the bending of the carriage guide shaft can be reduced can be obtained.

According to a fourth aspect of the present invention, in the third aspect, the carriage guide shaft is movably supported so that a distance between the head surface of the recording head and the recording surface of the recording sheet can be adjusted. The deflection amount regulating means is
Following the movement of the carriage guide shaft, the amount of bending of the carriage guide shaft can be regulated.
The carriage mounting device is characterized by the above.

In this way, the deflection of the carriage guide shaft is regulated by following the movement of the carriage guide shaft that is movably supported so that the distance between the head surface of the recording head and the recording surface of the recording paper can be adjusted. Therefore, the amount of bending of the carriage guide shaft can be regulated even in a recording apparatus having a configuration in which the PG can be changed according to the thickness of the recording paper.

Thus, according to the carriage guide shaft mounting device of the invention described in claim 4 of the present application, in addition to the function and effect of the invention of claim 3 of the present application, the PG is set in accordance with the thickness of the recording paper. Even in a recording apparatus having a changeable structure, it is possible to obtain the effect that the flexure of the carriage guide shaft can be reduced.

According to a fifth aspect of the present invention, in the fourth aspect, the vibration absorbing means includes the carriage guide shaft and a frame of the recording apparatus main body arranged in parallel with the carriage guide shaft. A coil spring contracted between the coil springs, and the bending amount restricting means is such that one end side of the middle support member inserted into the coil spring is swingable in the frame in the vertical movement direction of the carriage guide shaft. Supported,
A carriage mounting characterized in that the other end of the middle support member is supported by the carriage guide shaft so as to be slidable in a rotation direction around the carriage guide shaft. It is a device.

As described above, the coil spring, which is contracted between the carriage guide shaft and the frame of the recording apparatus main body arranged in parallel with the carriage guide shaft, can absorb the vibration of the carriage guide shaft. it can.

One end side is supported by the frame so as to be swingable in the vertical movement direction of the carriage guide shaft, and the other end side is slidable in the rotation direction about the carriage guide shaft about the carriage guide shaft. The supported center support member can regulate the amount of bending of the carriage guide shaft by following the vertical movement of the carriage guide shaft and the swing of the carriage guide shaft due to the vertical movement.

Thus, according to the carriage guide shaft mounting apparatus of the present invention, the space between the carriage guide shaft and the frame of the recording apparatus main body arranged in parallel with the carriage guide shaft is provided. A carriage guide shaft that can absorb the vibration of the carriage guide shaft and that is movable so that the distance between the head surface of the recording head and the recording surface of the recording paper can be adjusted by the coil spring that is contracted. It is possible to regulate the bending of the carriage guide shaft by following the movement of No. 4, and thereby, the same effect as that of the invention according to claim 4 of the present application can be obtained.

According to a sixth aspect of the present invention, in the fifth aspect, the bending amount regulating means is such that the other end side of the middle supporting member is supported in the vicinity of a central portion between both ends of the carriage guide shaft. The carriage mounting device is characterized in that

The amount of bending of the carriage guide shaft supported at both ends is considered to be the largest at the central portion thereof, and therefore, the central supporting member is rotatably supported at that portion, so that the bending amount is further increased. The quantity regulation effect can be enhanced.

Thus, according to the carriage guide shaft mounting device of the present invention as defined in claim 6, in addition to the effect of the invention of claim 5, the central portion between both ends of the carriage guide shaft is provided. By virtue of the structure in which the other end side of the middle support member is supported in the vicinity, the effect of restricting the amount of flexure can be further enhanced, so that the amount of flexure of the carriage can be more effectively restricted.

In the invention according to claim 7 of the present application, while reciprocating the carriage in which the recording head is mounted in the main scanning direction,
An operation of ejecting ink from the recording head onto recording paper,
The operation of transporting the recording paper in the sub-scanning direction by a predetermined transport amount is alternately repeated to pivotally support the carriage of the recording device that performs recording on the recording paper so as to reciprocate in the main scanning direction. A carriage mounting device, comprising: a carriage guide shaft whose both ends are supported by the recording device main body so that the distance between the head surface of the recording head and the recording surface of the recording paper is adjustable. A carriage mounting device comprising: a flexure amount regulating means configured to regulate the flexure amount of the carriage guide shaft by following the movement of the carriage guide shaft.

In this way, the deflection of the carriage guide shaft is regulated by following the movement of the carriage guide shaft that is movably supported so that the distance between the head surface of the recording head and the recording surface of the recording paper can be adjusted. Therefore, the amount of bending of the carriage guide shaft can be regulated even in a recording apparatus having a configuration in which the PG can be changed according to the thickness of the recording paper.

Thus, according to the carriage guide shaft mounting device of the present invention as defined in claim 7, the carriage guide shaft mounting device can change the PG according to the thickness of the recording paper. The effect that the bending of the shaft can be reduced and the deterioration of the recording image quality due to it can be reduced is obtained.

According to an eighth aspect of the present invention, in the seventh aspect, the bending amount regulating means is supported by the frame such that one end side of the middle supporting member is swingable in a vertical movement direction of the carriage guide shaft. The carriage guide shaft,
The carriage mounting device is characterized in that the other end of the middle support member is supported slidably in a rotation direction around the carriage guide shaft.

In this manner, one end side is supported by the frame so as to be swingable in the vertical movement direction of the carriage guide shaft, and the other end side is slid in the rotation direction about the carriage guide shaft about the carriage guide shaft. The movably supported middle support member can regulate the amount of bending of the carriage guide shaft by following the vertical movement of the carriage guide shaft and the swing of the carriage guide shaft due to the vertical movement.

Thus, according to the carriage guide shaft mounting device of the present invention, the distance between the head surface of the recording head and the recording surface of the recording paper is movably supported so that the distance can be adjusted. Since the bending of the carriage guide shaft can be regulated by following the movement of the carriage guide shaft, the same effect as the invention according to claim 7 of the present application can be obtained.

According to a ninth aspect of the present invention, in the eighth aspect, the deflection amount regulating means is such that the other end side of the middle supporting member is supported in the vicinity of the central portion between both ends of the carriage guide shaft. The carriage mounting device is characterized in that

The deflection amount of the carriage guide shafts supported at both ends is considered to be the largest near the central portion thereof. Therefore, since the center support member is rotatably supported at that portion, The effect of regulating the amount of bending can be enhanced.

Thus, according to the carriage guide shaft mounting device of the present invention as defined in claim 9, in addition to the function and effect of the invention as set forth in claim 8, the central portion between both ends of the carriage guide shaft is provided. By virtue of the structure in which the other end side of the middle support member is supported in the vicinity, the effect of restricting the amount of flexure can be further enhanced, so that the amount of flexure of the carriage can be more effectively restricted.

The invention described in claim 10 of the present application is the same as claim 1.
<9> A recording apparatus including the carriage mounting device according to any one of <1> to <9>. According to the recording apparatus of the invention described in claim 10 of the present application, the effects of the invention of any one of claims 1 to 9 of the application can be obtained in the recording apparatus.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. First, a schematic configuration of an inkjet recording apparatus as a “recording apparatus” according to the present invention will be described. FIG. 1 shows a "recording device" according to the present invention.
FIG. 2 is a perspective view showing an embodiment of the ink jet recording apparatus as described above, and FIG. 2 is a side view of a main part thereof.

In the ink jet type recording apparatus 50, a carriage guide shaft 61 is provided as a recording execution means for executing recording by ejecting ink onto the recording surface of the recording paper P while reciprocating in the main scanning direction X. Axial supported, main scanning direction X
A carriage 62 that moves to the right is provided. The carriage 62 has a recording head 6 for ejecting ink onto the recording paper P.
3 is installed. A platen 53 that faces the recording head 63 and defines the distance between the head surface of the recording head 63 and the recording paper P is provided. And the carriage 62
The operation of ejecting ink from the head surface of the recording head 63 onto the recording paper P while reciprocating in the main scanning direction X and the operation of conveying the recording paper P in the sub-scanning direction Y by a predetermined amount are alternately repeated. As a result, recording is performed on the recording paper P.

Further, the ink jet type recording apparatus 50 is
A sheet feeding cassette 70 capable of stacking a large number of recording sheets P is configured to be mountable, and with the sheet feeding cassette 70 mounted, a gate roller 73 arranged in the sheet feeding cassette 70 and a reverse roller The roller 74, the hopper 75, the hopper urging means 77, the high friction member 76, and the paper feed roller 71 and the pickup roller 72 arranged in the ink jet recording apparatus 50 make up the “paper feed means” for the recording paper P. Is configured as a paper feeding device.

Further, in the ink jet type recording apparatus 50, a conveyance driving roller 51 and a conveyance driven roller 52 are provided as "recording sheet conveying means" for intermittently conveying the fed recording sheet P in the sub-scanning direction Y. It is arranged. The conveyance driving roller 51 is rotationally controlled by the rotation driving force source, and the recording driving paper 51 is conveyed in the sub-scanning direction Y by the rotation of the conveyance driving roller 51. A plurality of transport driven rollers 52 are provided,
When the recording paper P is biased by the transport driving rollers 51 individually and is transported by the rotation of the transport driving rollers 51,
The recording paper P is brought into contact with the recording paper P and is rotated following the conveyance of the recording paper P.

A paper detector 56 is arranged on the upstream side of the conveyance driving roller 51 in the sub-scanning direction Y. Paper detector 56
Has a habit of self-returning to the standing posture and has a lever portion 56a pivotally supported in a state of protruding into the conveyance path of the recording paper P so as to be rotatable only in the recording paper conveyance direction. When the tip of the lever portion 56a is pushed by the recording paper P, the lever portion 56a rotates, and the recording paper P is detected.

Further, in the ink jet type recording apparatus 50, as a "recording sheet discharging means" for discharging the recording sheet P after recording is executed, a sheet discharging drive roller 54 and a sheet discharging driven roller 55.
Is provided. The paper ejection drive roller 54 is rotationally controlled by a rotational drive force source, and the recording paper P after recording is ejected in the sub-scanning direction Y by the rotation of the paper ejection drive roller 54. The paper discharge driven roller 55 is a toothed roller that has a plurality of teeth around it and is sharply sharpened so that the tips of the teeth make point contact with the recording surface of the recording paper P. The paper discharge driven rollers 55 are individually provided to the paper discharge drive rollers 54 so as not to damage the recording surface after recording.
The recording paper P is biased by a biasing force weaker than the biasing force of 2, and when the recording paper P is ejected by the rotation of the paper ejection drive roller 54, the recording paper P comes into contact with the recording paper P and rotates following the ejection of the recording paper P. Then, the recording paper P after recording is discharged to the downstream side in the sub-scanning direction Y by the paper discharge drive roller 54 and the paper discharge driven roller 55.

Paper ejection drive roller 54 and paper ejection driven roller 5
On the downstream side of 5, a curved path 3 is formed as a "discharge path" for inverting the recording paper P while curving the recorded recording surface inward and discharging the recording paper P to a paper discharge tray (not shown). . The curved path 3 inverts the surface of the recording paper P after recording and discharges the recording paper P in the discharge direction E while curving the recording surface inward as illustrated. A plurality of paper discharge drive rollers 31 and a plurality of paper discharge driven rollers 32 are arranged in the curved path 3.

The paper ejection drive rollers 31a to 31d are rotationally controlled by a rotational drive force source, like the paper ejection drive roller 54 described above, and the recording paper P on the curved path is ejected by the rotation of the paper ejection drive rollers 31a to 31d. It is discharged in the direction E. Also,
The paper discharge driven rollers 32 a to 32 d are the paper discharge driven rollers 55.
Similarly, the toothed roller has a plurality of teeth around it, and the tips of the teeth are sharply pointed so as to make point contact with the recording surface of the recording paper P. The recording paper P is discharged in the discharge direction E by the rotation of the discharge driving rollers 31a to 31d, respectively, by being biased to the discharge driving rollers 31a to 31d individually by a biasing force weaker than the biasing force of the transport driven roller 52 described above. When the recording paper P is ejected, the recording paper P comes into contact with the recording paper P and rotates following the ejection of the recording paper P.

Subsequently, the carriage 62 is moved in the main scanning direction X.
The configuration of the "carriage mounting device" according to the present invention, which is axially supported so as to be reciprocally movable, will be described. FIG. 3 is a plan view of a main part of the ink jet recording apparatus 50 according to the present invention.

The carriage 62 is arranged in the ink jet type recording apparatus 50 in parallel with the main scanning direction X, and is constituted by a carriage guide shaft 61 and a sub-carriage guide shaft 61S which constitute a carriage mounting device according to the present invention. It is pivotally supported so that it can reciprocate. The carriage guide shaft 61 and the sub-carriage guide shaft 61S are disposed so as to be vertically movable in the vertical direction with respect to the head surface of the recording head 63. Axis 6
The vertical movement of 1S causes the carriage 62 to move up and down to P
The configuration is such that G can be adjusted.

In the vicinity of the carriage guide shaft 61, the frame 2 forming a part of the main body of the ink jet type recording apparatus 50 is arranged substantially parallel to the main scanning direction X. The frame 2 and the vicinity of the center of the carriage guide shaft 61 can follow the vertical movement of the carriage guide shaft 61 by the center support member 21 as the "deflection amount controlling means" that constitutes the carriage mounting device according to the present invention. It is connected.

FIG. 4 is a side view of the carriage mounting device according to the present invention, FIG. 4 (a) is the whole, and FIG. 4 (b) is a center support for the frame 2 and the carriage guide shaft 61. The connecting portion by the member 21 is enlarged and a partial cross section is shown.

The carriage 62 is slidably supported by the bearing portion 62a on the carriage guide shaft 61 on the sliding contact surface 11. The carriage guide shaft 61 and the frame 2 are connected by the middle support member 21.
One end of the middle support member 21 is the swinging portion 2 of the frame 2.
3 is swingably supported in the vertical movement direction of the carriage guide shaft 61, and the other end side is in sliding contact with the carriage guide shaft 61 in the rotation direction about the axis of the carriage guide shaft 61.
It is slidably supported at 2. Further, between the carriage guide shaft 61 and the frame 2, a coil spring 22 as a “vibration absorbing means” constituting the carriage mounting device according to the present invention is contracted, and the center support member 21 is
The coil spring 22 is arranged so as to be inserted into the coil spring 22.

In this way, the carriage guide shaft 61 is
Since the carriage guide 62 is reciprocated in the main scanning direction X by being connected to the frame 2 by the middle supporting member 21 as the “deflection amount regulating means”, the main guide direction X acts on the carriage guide shaft 61. Deflection due to vertical force is restricted. In addition, the carriage guide shaft 61
Is a small vibration that acts on the carriage guide shaft 61 when the carriage guide 62 reciprocates in the main scanning direction.
It is absorbed by the coil spring 22 as "vibration absorbing means".

Further, the middle support member 21 is swingably supported by the frame 2 at the swing portion 23 with respect to the vertical movement of the carriage guide shaft 61, and the middle support member 21 and the carriage guide shaft 61 are connected. When the center support member 21 swings as the carriage guide shaft 61 moves up and down, the support portion 21a of the center support member 21 slides in the direction of rotation about the carriage guide shaft 61 axis. It is rotatably connected in a state of slidingly contacting the surface 12.

FIG. 5 is an enlarged side view showing a connecting portion of the frame 2 and the carriage guide shaft 61 by the middle support member 21 when the carriage guide shaft 61 moves up and down, and FIG. The carriage guide shaft 61 moves downward, and FIG. 5B shows the state moved upward.

When the center support member 21 swings in the swinging portion 23 as the carriage guide shaft 61 moves up and down, the support portion 21a of the center support member 21 rotates about the axis of the carriage guide shaft 61. It rotates in the moving direction while being in sliding contact with the sliding contact surface 12. Therefore, by connecting the carriage guide shaft 61 and the frame 2, the carriage guide shaft 6 is connected.
When the carriage guide shaft 61 moves up and down, the center support member 21 that regulates the flexure of the carriage 1 follows the up and down movement of the carriage guide shaft 61 and maintains the connected state between the carriage guide shaft 61 and the frame 2 while maintaining the carriage. Guide shaft 61
It is possible to regulate the bending of the.

In this way, in the ink jet type recording apparatus 50 having the carriage guide shaft 61 arranged so as to be movable up and down in order to adjust the PG, the carriage 6
It is possible to reduce the minute vibration 2 and the bending of the carriage guide shaft 61, and to reduce the deterioration of the recording image quality.

As another embodiment, there is one in which only the above-mentioned middle support member 21 is provided between the carriage guide shaft 61 and the frame 2 as the "bending amount regulating means". FIG. 6 is a side view of the carriage mounting device in which only the intermediate support member 21 is provided between the carriage guide shaft 61 and the frame 2, and FIG. 6A is the whole thereof, and FIG. Is the frame 2 and the carriage guide shaft 6
1 is an enlarged cross-sectional view of a connecting portion of the intermediate support member 21 and the intermediate support member 21.

The connecting portion between the carriage guide shaft 61 and the frame 2 by the center support member 21 has the same structure as that of the embodiment shown in FIG. 4, and reduces the vibration of the carriage 62 due to the reciprocating motion. Although the effect is not obtained, since the bending of the carriage guide shaft 61 can be regulated by following the movement of the carriage guide shaft 61, in the ink jet recording apparatus 50 configured to move the carriage guide shaft 61 up and down, The amount of bending of the carriage guide shaft 61 can be regulated, and the deterioration of the recording image quality due to it can be suppressed.

Further, as another embodiment, there is one in which only the above-mentioned coil spring 22 is provided between the carriage guide shaft 61 and the frame 2 as the "vibration absorbing means". FIG. 7 is a side view of the carriage mounting device in which only the coil spring 22 is provided between the carriage guide shaft 61 and the frame 2, FIG. 7 (a) is the whole, and FIG. 7 (b) is , Frame 2 and carriage guide shaft 6
1 is an enlarged view of a portion of the coil spring 22 which is contracted between the coil spring 22 and the coil spring 1.

The coil spring 22 is used for the carriage guide shaft 6
The coil spring 22 may be fixed to the carriage guide shaft 61 and the frame 2, respectively, and the elastic force of the coil spring 22 allows the carriage to flexibly move. It is possible to follow the vertical movement of the guide shaft 61. Carriage guide shaft 6
Although the effect of restricting the flexure of No. 1 is small, it is possible to follow the movement of the carriage guide shaft 61 and reduce the vibration accompanying the reciprocating movement of the carriage 62, so that the carriage guide shaft 61 moves up and down. In the recording apparatus 50, the vibration of the carriage guide shaft 61 can be reduced, and the deterioration of the recording image quality due to the vibration can be reduced.

Further, as another embodiment, an elastic body 24 made of elastic rubber or the like is provided between the carriage guide shaft 61 and the frame 2 as "vibration absorbing means". 8A and 8B are side views of the carriage mounting device in which the elastic body 24 is disposed between the carriage guide shaft 61 and the frame 2, FIG. 8A is the whole thereof, and FIG. , Frame 2 and carriage guide shaft 6
1 is an enlarged view of a portion of the elastic body 24 disposed between the elastic body 24 and the elastic body 24.

The elastic body 24 is fixed on the frame 2 side by screws or the like, and is arranged so as to be able to follow the vertical movement of the carriage guide shaft 61 in a state where the carriage guide shaft 61 side is in sliding contact with the peripheral surface of the carriage guide shaft 61. Has been done.
Although the effect of restricting the bending of the carriage guide shaft 61 is small, it is possible to follow the movement of the carriage guide shaft 61 and reduce the vibration accompanying the reciprocating motion of the carriage 62, so that the carriage guide shaft 61 moves up and down. In the ink jet recording apparatus 50 having the above structure, the vibration of the carriage guide shaft 61 can be reduced, and the deterioration of the recording image quality due to the vibration can be reduced.

The invention of the present application is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the invention of the present application. Needless to say.

[0064]

According to the present invention, the carriage guide shafts supported by the recording apparatus at both ends are fixed to the frame of the recording apparatus without fixing the vicinity of the central portion to the frame of the recording apparatus by the middle supporting member or the like. It is possible to reduce vibration and bending of the carriage guide shaft, and to reduce deterioration of recording quality due to the reduction.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an ink jet recording apparatus as a “recording apparatus” according to the present invention.

FIG. 2 is a side view of essential parts showing an embodiment of an ink jet recording apparatus as a “recording apparatus” according to the present invention.

FIG. 3 is a plan view of a main part of the ink jet recording apparatus according to the present invention.

FIG. 4 is a side view of the carriage mounting device according to the present invention, FIG. 4 (a) is its whole, and FIG. 4 (b) is
The connecting portion of the frame and the carriage guide shaft by the central supporting member is enlarged and partially shown in section.

FIG. 5 is an enlarged side view showing a connecting portion between the frame and the carriage guide shaft by an intermediate support member when the carriage guide shaft moves up and down, and FIG. 5A shows the carriage guide shaft in a downward direction. Further, FIG. 5 (b) shows a state of moving upward.

6A and 6B are side views of a carriage mounting device in which only a middle supporting member is provided between a carriage guide shaft and a frame, FIG. 6A is the whole thereof, and FIG. It is the thing which expanded and showed the connection part by a supporting member.

7A and 7B are side views of a carriage mounting device in which only a coil spring is provided between a carriage guide shaft and a frame, FIG. 7A is the whole thereof, and FIG. 7B is a coil spring. It is an enlarged view of the part.

8 is a side view of a carriage mounting device in which an elastic body is arranged between a carriage guide shaft and a frame.
FIG. 8A is the whole thereof, and FIG. 8B is an enlarged view of the elastic body portion.

[Explanation of symbols]

2 frames 21 Middle support member 22 coil spring 23 Swing part 24 Elastic body 50 inkjet recording device 51 Transport drive roller 52 Transport driven roller 53 Platen 54 Paper ejection drive roller 55 Paper ejection driven roller 56 paper detector 61 Carriage guide shaft 61S Sub carriage guide shaft 62 carriage 62a bearing part 63 recording head 70 paper cassettes 71 paper feed roller P recording paper X main scanning direction Y sub-scanning direction

Claims (10)

[Claims] 1. An operation of ejecting ink from the recording head onto a recording paper while reciprocating a carriage carrying the recording head in the main scanning direction, and conveying the recording paper in a sub-scanning direction by a predetermined amount. A carriage mounting device that pivotally supports the carriage of a recording device that performs recording on the recording paper by alternately repeating the operation and reciprocating movements in the main scanning direction. A carriage guide shaft supported by the carriage guide shaft; and a vibration absorbing unit made of an elastic body disposed between the carriage guide shaft and the recording apparatus main body and capable of absorbing vibration of the carriage guide shaft. Carriage mounting device. 2. The carriage according to claim 1, wherein the vibration absorbing means is arranged between a vicinity of a central portion between both ends of the carriage guide shaft and the recording apparatus main body. Mounting device. 3. The carriage mounting device according to claim 1, further comprising a deflection amount regulation means for regulating a deflection amount of the carriage guide shaft. 4. The deflection guide member according to claim 3, wherein the carriage guide shaft is movably supported so that a distance between a head surface of the recording head and a recording surface of the recording sheet can be adjusted. Is configured so that the amount of bending of the carriage guide shaft can be regulated by following the movement of the carriage guide shaft. 5. The coil spring according to claim 4, wherein the vibration absorbing means is contracted between the carriage guide shaft and a frame of the recording apparatus main body arranged in parallel with the carriage guide shaft. In the deflection amount regulating means, one end side of the middle supporting member inserted into the coil spring is supported by the frame so as to be swingable in the vertical movement direction of the carriage guide shaft, and A carriage mounting device, characterized in that the other end side is supported by the carriage guide shaft so as to be slidable in a rotation direction about the shaft of the carriage guide shaft. 6. The flexure amount regulating means according to claim 5, wherein the other end side of the middle supporting member is supported in the vicinity of a central portion between both ends of the carriage guide shaft. A carriage mounting device characterized by the above. 7. An operation of ejecting ink from the recording head onto the recording paper while reciprocating a carriage having the recording head in the main scanning direction, and conveying the recording paper in a sub-scanning direction by a predetermined conveying amount. A carriage mounting device that pivotally supports the carriage of a recording device that performs recording on the recording paper by alternately repeating the operation and reciprocating movement in the main scanning direction, the carriage mounting device comprising: a head surface of the recording head; A carriage guide shaft whose both ends are supported by the recording apparatus main body so that the distance between the recording paper and the recording surface can be adjusted, and a movement of the carriage guide shaft follows the movement of the carriage guide shaft. A carriage mounting device comprising: a deflection amount restricting unit configured to restrict a deflection amount. 8. The flexure amount regulating means according to claim 7, wherein one end of an intermediate support member is supported by the frame so as to be swingable in a vertical movement direction of the carriage guide shaft, and the carriage guide shaft includes: The other end side of the middle support member is
A carriage mounting device characterized in that the carriage mounting shaft is slidably supported in a rotation direction about an axis of the carriage guide shaft. 9. The bending amount regulating means according to claim 8, wherein the other end side of the middle supporting member is supported in the vicinity of a central portion between both ends of the carriage guide shaft. A carriage mounting device characterized by the above. 10. A recording apparatus comprising the carriage mounting device according to claim 1.