JP2004276398A - Ink jet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent print quality from deteriorating by suppressing vibration during carriage scan. <P>SOLUTION: When a carriage 12 mounting a head is secured to two sliders 10a and 10b fixed slidably to a guide rail 17, each slider 10a, 10b is provided with a positioning part at one facing position on the inside and provided with fixing parts at two positions on the outside. A positioning pin 22 is inserted at each positioning part and the carriage 12 is secured to the slider 10a, 10b at each fixing part by means of a bolt 20. The bolt 20 is fixed while locating the threaded forward end on the slider 10a, 10b side under such a state as a washer 21 is provided at the constricting part of the head part, an O-ring 18 is placed on the upper surface thereof and a spacer 19 is provided further on the inside. Gravity of the carriage 12 is applied substantially to the side wall at the flange part 20z of a bolt 20 insertion hole 20y and the unerlying O-ring 18 is pressed between the lower surface of the flange part 20z and the upper surface of the washer 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ink jet recording apparatus that performs recording by ejecting ink from nozzles of a head and attaching the ink to a recording medium.
[0002]
[Prior art]
2. Description of the Related Art Ink jet recording apparatuses are widely used as copiers, facsimile machines, printers, word processors, and the like as office and personal information recording apparatuses. For example, in an ink jet printer, a carriage on which a head is mounted is slidably supported by guide rails extending along the main scanning direction, and a recording medium such as paper is formed by reciprocating the carriage in the main scanning direction. Is recorded. The carriage is fixed to a member (hereinafter, referred to as a “slider”) slidably attached to the guide rail, and slides along the longitudinal direction of the guide rail through this member. (See Patent Document 1). Here, a bolt and a screw are generally used to fix the carriage and the slider to each other.
[0003]
[Patent Document 1]
JP-A-10-086355 (page 3, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, when the carriage and the slider are fixed using bolts, screws, or the like, minute vibrations generated in the slider itself during scanning of the carriage are directly transmitted from the slider to the carriage and the head. Also, since there is some distance from the carriage to the head surface, which is the ink ejection surface, the vibration generated near the slider has a larger amplitude on the head surface. Such vibration prevents the ink ejected from the head surface from landing on a desired position, causes printing unevenness, and causes deterioration of print quality.
[0005]
There is also a technique in which a plurality of small spherical members are interposed between a guide rail and a slider, and the spherical member is rolled to allow the slider to slide along the guide rail. This technique has the advantage that the slider portion can be saved in space and high rigidity can be effectively obtained, but relatively large vibration is likely to occur in the slider itself due to the rolling of the spherical member when the slider slides. Therefore, when this technique is adopted, the above-described problem becomes particularly serious.
[0006]
Therefore, a main object of the present invention is to provide an ink jet recording apparatus capable of suppressing vibration during carriage scanning and preventing deterioration of print quality.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an ink jet recording apparatus according to the present invention includes a guide rail extending along a main scanning direction, a slider slidably mounted on the guide rail, and an ink on a recording medium surface. And a carriage which is reciprocally movable in the main scanning direction by being fixed to the slider, the carriage being fixed to the slider via an elastic body.
[0008]
According to the above configuration, vibration generated in the slider during carriage scanning is absorbed by the elastic body interposed between the carriage and the slider, and transmission of the vibration to the carriage is suppressed. Therefore, the head mounted on the carriage is less likely to vibrate, and it is possible to prevent deterioration of ink landing accuracy and print quality. In general, a complicated configuration is taken to prevent vibration, but the above configuration can be realized simply and inexpensively by a configuration in which an elastic body is interposed.
[0009]
In the ink jet recording apparatus according to the present invention, a fixing hole is formed on a surface of the slider facing the carriage, and the fixing hole is fitted into the carriage at a position corresponding to the fixing hole of the slider. A fixing member insertion hole into which the fixing member can be inserted is formed, and the fixing member is fixed via an elastic body disposed near the fixing member insertion hole and a regulating member for regulating a contraction amount of the elastic body. The carriage is preferably fixed to the slider by being fitted into the fixing hole through the member insertion hole (claim 2).
[0010]
According to the above configuration, by providing the restricting member in the vicinity of the elastic member interposed between the carriage and the slider, the amount of contraction of the elastic member in the fixing member insertion direction is restricted, and the fixing member insertion between the carriage and the slider is performed. The distance in the direction can be managed. For example, when there are a plurality of fixing portions of both, the elastic member is pressed by the insertion of the fixing member and the amount of contraction can be made substantially the same in all fixing portions. On the other hand, if the amount of contraction of the elastic member in the fixing member insertion direction cannot be controlled in each fixing portion, that is, if the distance between the carriage and the slider in the fixing member insertion direction cannot be controlled, for example, when replacing the carriage with another one, In this case, the positional relationship between the slider and the carriage changes, and the print quality may deteriorate. With the above configuration, such a disadvantage can be solved.
[0011]
In the ink jet recording apparatus according to the present invention, a positioning hole is formed on a surface of the slider facing the carriage, and a positioning member receiving hole is formed at a position corresponding to the positioning hole of the slider on the carriage. By inserting the positioning member into the positioning hole and the positioning member receiving hole, it is preferable that the positional relationship between the slider and the carriage in the facing surface direction is maintained.
[0012]
According to the above configuration, when the slider and the carriage are fixed, the positioning member can be used to hold the slider and the carriage at an appropriate fixing position in advance, so that the fixing operation can be performed easily and accurately. Further, even when the carriage is replaced with another one, the slider and the carriage can be fixed in the same positional relationship each time.
[0013]
Further, in the inkjet recording apparatus according to the present invention, it is preferable that the slider is divided into a plurality of parts along the sliding direction with respect to the guide rail, and a positioning hole is formed in each of the divided parts. ).
[0014]
In the case where the slider is not divided but is formed of one member, it is necessary to provide two positioning portions in the plane facing each other to position the slider and the carriage in the plane direction. In this case, the hole formed in the carriage at one of the positioning portions is generally slightly larger than the positioning member in consideration of an error in the position of the positioning portion in manufacturing, but one hole is slightly larger. Therefore, the positioning accuracy is deteriorated. On the other hand, in the above configuration, the slider is divided, and the positioning holes are formed one by one in the divided slider, so that the holes formed in the carriage do not have to be enlarged, thereby deteriorating the positioning accuracy. The fixing operation can be easily performed without causing the fixing operation.
[0015]
In the inkjet recording apparatus according to the present invention, a plurality of spherical members are interposed between the guide rail and the slider, and the slider may slide on the guide rail along with the rolling of the spherical member. Item 5).
[0016]
The above configuration has the advantage that the slider portion can be saved in space and high rigidity can be effectively obtained, but the slider itself tends to vibrate due to the rolling of the spherical member when the slider slides. For this reason, the problem of vibration transmitted from the slider to the carriage becomes particularly serious. However, even in such a case, by adopting the configuration according to the present invention, it is possible to simply and inexpensively suppress the vibration of the carriage and the head and prevent the print quality from deteriorating.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0018]
First, a schematic configuration of an ink jet printer according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing an ink jet printer according to the present embodiment. As shown in FIG. 1, the ink jet printer 1 according to the present embodiment includes a transport roller unit 5, an ink jet printing unit 6, a pressure roller unit 7, a cutting unit 8 in a substantially rectangular parallelepiped housing 30. And a discharge roller unit 9. In the housing 30, long papers 2 and 3 formed with rolls 2a and 3a wound in a roll shape are adjacent in the horizontal direction (the direction perpendicular to the paper surface in FIG. 1). The winding portions 2a, 3a of the sheets 2, 3 are held by drums 2b, 3b rotatable around the axis, respectively. The operation of each part of the ink jet printer 1 is controlled by a controller (not shown) arranged in the housing 30.
[0019]
The transport roller unit 5 transports the sheets 2 and 3 together with the pressure roller unit 7 to the downstream side while unwinding them from the winding units 2a and 3a, and after passing the ink jet printing unit 6, the sheet 2 is sent to the cutting unit 8. Supply a few. The transport roller unit 5 has a pair of drive rollers disposed adjacent to each other so as to correspond to the transport paths of the sheets 2 and 3, respectively. Transport.
[0020]
The inkjet printing unit 6 includes two print heads 11, a carriage 12 that holds the two print heads 11, a printing table 13 that supports papers 2 and 3 that are arranged to face the print head 11, and a suction fan 14. Have.
[0021]
The two print heads 11 are arranged at a predetermined interval along the transport direction of the sheets 2 and 3 (hereinafter, referred to as “sub-scanning direction”). Each of the two print heads 11 is provided with a number of discharge nozzles capable of discharging color ink on the surfaces of the sheets 2 and 3. In the present embodiment, for the two print heads 11, yellow (Y), light black (LB), magenta (M), light magenta (LM), cyan (C), light cyan (LC), A large number of ejection nozzles capable of ejecting color inks such as black (BK) are appropriately allocated and arranged. Therefore, the print head 11 discharges color ink from a number of discharge nozzles toward the front surface (the upper surface in FIG. 1) of the conveyed paper sheets 2 and 3 based on a signal from the controller, thereby forming a desired one. Color images can be printed.
[0022]
The carriage 12 is capable of reciprocating in a direction orthogonal to the sub-scanning direction (a direction perpendicular to the plane of FIG. 1 and referred to as a “main scanning direction” in the following description). Therefore, the print head 11 ejects ink toward the surfaces of the sheets 2 and 3 while reciprocating in the main scanning direction together with the reciprocating movement of the carriage 12. The operation of the carriage 12 will be described later in more detail with reference to FIGS. 2A and 2B and FIGS. 3A and 3B.
[0023]
The printing table 13 has a paper support surface 13a disposed on substantially the same surface as the transport surface of the paper 2. The print head 11 ejects ink to the paper 2 on the printing table 13 while reciprocating along the width direction of the printing table 13 while facing the support surface 13 a of the printing table 13. Note that the printing table 13 is provided so as to be inclined obliquely upward from the upstream side in the sub-scanning direction to the downstream side.
[0024]
The suction fan 14 is for sucking the sheets 2 and 3 onto the printing table 13 through suction holes (not shown) formed in the printing table 13. It is arranged at a position facing the carriage 12. The sheets 2 and 3 facing the print head 11 are conveyed while being in close contact with the support surface 13a of the printing table 13 by being sucked by the suction fan 14 arranged on the back side (the lower side in FIG. 1) of the sheets 2 and 3. Is done. As a result, the interval between the papers 2 and 3 and the print head 11 becomes constant, and when the papers 2 and 3 are curled, a part of the papers 2 and 3 is largely separated from the printing table 13 so that the paper 2 and the print head 11 can be separated. The occurrence of printing trouble due to the change in the interval is suppressed.
[0025]
The pressure roller unit 7 is for nipping and transporting the sheet 2 transported between the inkjet printing unit 6 and the cutting unit 8 and has a pressure roller pair. By arranging the pressure roller unit 7 between the inkjet printing unit 6 and the cutting unit 8, it is possible to appropriately perform printing of an image by the inkjet printing unit 6 and cutting of the paper 2 by the cutting unit 8.
[0026]
The cutting unit 8 includes a movable blade 8a arranged on the same side as the print head 11 with respect to the sheets 2 and 3, and a fixed blade 8b arranged to face the movable blade 8a with the sheets 2 and 3 interposed therebetween. Have. Each of the movable blade 8a and the fixed blade 8b is a rectangular blade having a width slightly larger than the width of the transport path of the sheets 2 and 3. The movable blade 8a can approach or separate from the fixed blade 8b. Therefore, by the cooperation of the movable blade 8a and the fixed blade 8b, it is possible to cut the printed sheets 2, 3 conveyed from the upstream side in the conveying path along the width direction.
[0027]
The discharge roller unit 9 has a drive roller pair, and conveys the printed sheets 2 and 3 cut by the cutting unit 8 to the discharge port 30a. The printed and cut sheets 2 and 3 are discharged from the discharge port 30a in this manner.
[0028]
The controller performs a predetermined process on an image signal supplied from an input interface (not shown) and supplies a print signal including image data corresponding to an image to be printed to the inkjet printing unit 6. The controller also controls the timing of transporting the sheets 2 and 3 by the transport roller unit 5 and the discharge roller unit 9, the timing of moving the carriage 12, the timing of discharging ink from the print head 11, and the timing of cutting the sheets 2 and 3 by the cutting unit 8. Etc. can be controlled.
[0029]
Next, the operation of the carriage 12 of the printing unit 6 shown in FIG. 1 will be described in more detail with reference to FIGS. FIG. 2A is a partial view showing the printing unit of FIG. 1, and FIG. 2B is a partial view showing the printing unit as viewed from the left side of FIG. 2A.
[0030]
The two print heads 11 are supported below the carriage 12, and are capable of reciprocating with the carriage 12 in the main scanning direction indicated by an arrow in FIG. The carriage 12 is slidably supported by a guide rail 17 extending along the main scanning direction. More specifically, two sliders 10a and 10b separated from each other along the main scanning direction are fixed to the upper surface of the carriage 12, and these sliders 10a and 10b are slidably mounted on the guide rail 17 so as to be slidable. The lower carriage 12 is also slidable on the guide rail 17.
[0031]
Guide rail 17 and each slider 10a. A number of spherical members (not shown) are interposed between the sliders 10a and 10b, and the sliders 10a and 10b are configured to slide with respect to the guide rails 17 with the rolling of the spherical members. . For example, in a groove formed on both sides in the longitudinal direction of the guide rail 17 (on both the left and right sides of the guide rail 17 in FIG. 2A), two rows are formed along the longitudinal direction and a large number of beads are formed in a row. Place a small spherical member. The spherical member rolls and circulates in the row between the guide rail 17 and each of the sliders 10a and 10b, and the sliders 10a and 10b slide with respect to the guide rail 17.
[0032]
As means for driving the carriage 12, a drive pulley 15 rotated by a carriage drive motor (not shown) and a driven pulley (FIG. 2A) which is disposed to face the drive pulley 15 in the main scanning direction. b) shows only the drive pulley 15), and an endless carriage drive belt 16 bridged between the drive pulley 15 and the driven pulley. The carriage 12 is fixed to the lower span of the carriage drive belt 16. Accordingly, when the carriage drive belt 16 is rotated in the forward and reverse directions by the drive pulley 15 and the driven pulley by the rotation of the carriage drive motor, the carriage 12 fixed to the drive belt 16 moves the sliders 10a and 10b. And reciprocates in the main scanning direction while being supported by the guide rail 17.
[0033]
Next, the fixing of the carriage 12 and the sliders 10a and 10b will be described with reference to FIGS. FIG. 3A is a plan view showing a fixing portion and a positioning portion of the carriage 12 and the sliders 10a and 10b depicted in FIG. 2B, and FIG. 3B is surrounded by a dashed line in FIG. 2B. FIG. 4 is a cross-sectional view taken along line BB ′ of FIG.
[0034]
First, as shown in FIG. 3 (a), the arrangement of the fixing portion and the positioning portion between the carriage 12 and the sliders 10a and 10b are opposed to each other among the four corners of each of the sliders 10a and 10b having a substantially rectangular planar shape. One inside portion is a positioning portion (shown by a black circle in the figure), and two outside portions are fixed portions (shown by a white circle in the diagram).
[0035]
As shown in FIG. 3B, a positioning hole 22x is formed at a position corresponding to the positioning portion on the surface of the slider 10b facing the carriage 12. A positioning pin receiving hole 22y is formed at a position corresponding to the positioning portion on the surface of the carriage 12 facing the slider 10b, that is, at a position corresponding to the positioning hole 22x of the slider 10b. The positioning pin 22 is fitted in a positioning hole 22x of the slider 10b and a positioning pin receiving hole 22y of the carriage 12.
[0036]
On the other hand, as shown in FIG. 3B, a fixing hole 20x is formed at a position corresponding to the fixing portion on the surface of the slider 10b facing the carriage 12. Further, a bolt insertion hole 20y is formed at a position corresponding to the fixing portion on the surface of the carriage 12 facing the slider 10b, that is, at a position corresponding to the fixing hole 20x of the slider 10b. The diameter of the bolt insertion hole 20y is reduced on the upper side, that is, on the slider 10b side, and a flange portion 20z is formed in the reduced diameter portion. The bolt 20 has a threaded portion in which the spacer 19 disposed inside the flange portion 20z of the bolt insertion hole 20y and the O-ring 18 disposed outside the spacer 19 and below the flange portion 20z are supported by the washer 21. It is fitted in the fixing hole 20x so that the tip is on the slider 10b side.
[0037]
Although the above description is for only one slider 10b shown in FIG. 3B, the same applies to the positioning portion and the fixing portion of the other slider 10a.
[0038]
Therefore, in the present embodiment, in the positioning portions provided one by one for each of the sliders 10a and 10b, by using the positioning pins 22, the positional relationship in the plane direction in which the sliders 10a and 10b and the carriage 12 face each other is appropriately adjusted. After being set so that both are fixed, the bolts 20 are used to fix the two at each fixing portion while maintaining the positional relationship between the two. When only the positioning pins 22 are inserted before being fixed by the bolts 20, the positional relationship between the sliders 10a and 10b and the carriage 12 in the facing surface direction is maintained, but the insertion direction of the positioning pins 22, that is, The positional relationship in the vertical direction on the paper of FIG. 3B is not maintained. That is, in a state where only the positioning pins 22 are inserted, the sliders 10a and 10b and the carriage 12 can be removed in a direction orthogonal to the surfaces facing each other.
[0039]
Further, when the two parts are fixed by using the bolt 20, the washer 21 is located at the constricted position of the head of the bolt 20, the O-ring 18 is provided on the upper surface of the washer 21, and a spacer is provided inside the O-ring 18 on the outer periphery of the screw portion of the bolt 20. In a state in which 19 is arranged, the bolt 20 is inserted toward the upper side of the paper surface of FIG. 3B, penetrates through the bolt insertion hole 20y, and the tip of the screw portion is fitted into the bolt hole 20x. Here, since the O-ring 18 is made of an elastic material such as rubber and the spacer 19 is made of a rigid member, in the process of fixing the O-ring 18 with the bolt 20 described above, the O-ring 18 Is pressed between the lower surface of the flange portion 20z and the upper surface of the washer 18 to contract, but the spacer 19 is rigid and does not contract. Therefore, the amount of shrinkage of the O-ring 18 in the bolt 20 insertion direction is kept constant by the presence of the spacer 19.
[0040]
As described above, according to the ink jet printer 1 of the present embodiment, the vibration generated in the sliders 10a and 10b during the scanning of the carriage 12 is caused by the O-ring interposed between the carriage 12 and the sliders 10a and 10b. The vibrations are absorbed by the transmission 18 and the transmission of the vibrations to the carriage 12 is suppressed. Therefore, the head 11 mounted on the carriage 12 is unlikely to vibrate, and it is possible to prevent deterioration of ink landing accuracy and print quality. In general, a complicated configuration is taken for measures against vibration, but this embodiment can be realized simply and inexpensively by a configuration in which the O-ring 18 is interposed.
[0041]
Further, by providing a spacer 19 in the vicinity of the O-ring 18 interposed between the carriage 12 and the sliders 10a and 10b, the amount of contraction of the O-ring 18 in the bolt insertion direction is regulated, and the carriage 12 and the sliders 10a and 10b are controlled. The distance in the bolt insertion direction between the two can be managed. Therefore, when there are a plurality of fixing portions as in the present embodiment, the amount by which the O-ring 18 is pressed and contracted by, for example, insertion of the bolt 20 can be made substantially the same in all the fixing portions. On the other hand, if the amount of shrinkage of the O-ring 18 in the bolt insertion direction cannot be controlled at each fixing portion, that is, if the distance between the carriage 12 and the sliders 10a and 10b in the bolt insertion direction cannot be controlled, the carriage 12 may be replaced with another one. When replacing the carriage 12, the positional relationship between the sliders 10a and 10b and the carriage 12 may change, and the print quality may deteriorate. In the present embodiment, such inconvenience can be solved.
[0042]
Further, when the sliders 10a, 10b and the carriage 12 are fixed, the positioning pins 22 can be used to hold the two at an accurate fixing position in advance, so that the fixing operation can be performed easily and accurately. Further, even when the carriage 12 is replaced with another one, the sliders 10a and 10b and the carriage 12 can be fixed in the same positional relationship each time.
[0043]
In addition, for example, when the slider is not divided but is made of one member, to position the slider and the carriage 12 in the plane direction, it is necessary to provide two positioning portions in a plane facing each other. In this case, the hole formed in the carriage 12 at one of the positioning portions is generally slightly larger than the positioning pin 22 in consideration of an error in the position of the positioning portion in manufacturing. Because it is slightly larger, the positioning accuracy deteriorates. On the other hand, in the configuration described above, the slider is divided and the two divided sliders 10a and 10b are provided with the positioning holes 22x one by one (see FIG. 3A), so that the hole formed in the carriage 12 is enlarged. Therefore, the fixing operation can be easily performed without deteriorating the positioning accuracy.
[0044]
In the present embodiment, a large number of spherical members are interposed between each of the sliders 10a and 10b and the carriage 12. In this configuration, the sliders 10a and 10b can be saved in space and have high rigidity. However, the sliders 10a and 10b themselves tend to vibrate due to the rolling of the spherical members when the sliders 10a and 10b slide. For this reason, the problem of vibration transmitted from the sliders 10a and 10b to the carriage 12 is particularly serious. However, even in such a case, in the above-described embodiment, it is possible to simply and inexpensively suppress the vibration in the carriage 12 and the head 11 and prevent the print quality from deteriorating.
[0045]
Further, in the present embodiment, in a configuration in which the sliders 10a and 10b are mounted below the guide rail 17, and the carriage 12 is further mounted below the guide rail 17, as shown in FIG. The guide rail 17 supports the gravitational force of the carriage 12 in the flange portion 20z formed at the same time, and the O-ring 18 disposed below the flange portion 20z is pressed by the flange portion 20z. In such a configuration, even if the sliders 10a and 10b vibrate in a plane direction perpendicular to the plane of FIG. 3B, the vibration is absorbed by the O-ring 18 and the vibration generated in the carriage 12 can be suppressed.
[0046]
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the claims.
[0047]
For example, in the above-described embodiment, the bolts 20, the washers 21 and the like are used to fix the sliders 10a and 10b and the carriage 12, but the present invention is not limited thereto, and various other members may be used as fixing members. Good. A screw pin having a head in which a driver fitting hole is formed on the front surface (the lower side of the paper surface of FIG. 3B) is used. The O-ring 18 may be provided at the portion and fixed without using the spacer 19. In this case, the side wall of the head of the screw pin functions as the spacer 19, and the amount of contraction of the O-ring 18 in the screw pin insertion direction is regulated.
[0048]
Further, it is not necessary to use the spacer 19 or a member having the same role as the spacer as described above. However, in this case, the amount of contraction of the O-ring 18 in the fixing member insertion direction such as the bolt 20 cannot be restricted. Further, the carriage 12 may be fixed to the sliders 10a and 10b by various other fixing methods as long as the carriage 12 is fixed via an elastic member such as the O-ring 18.
[0049]
In the above-described embodiment, two sliders 10a and 10b are provided. However, the number of sliders is not limited to two, and may be only one or three or more. However, in the case of only one, it is necessary to provide two positioning portions on the slider. In this case, in one of the positioning portions, the hole formed in the carriage is generally slightly larger than the positioning pin 22. This is because it is necessary to consider an error in the position of the positioning portion in manufacturing, but the positioning accuracy is deteriorated because one of the holes is slightly larger. If three or more sliders are provided, the fixing operation becomes complicated. Therefore, it is preferable to provide two sliders 10a and 10b as in the above embodiment.
[0050]
Further, a configuration may be adopted in which a positioning portion for maintaining the positional relationship between the carriage 12 and each of the sliders 10a and 10b is not provided. Further, the positions and the number of fixing portions and positioning portions between the carriage 12 and each of the sliders 10a and 10b can be variously changed in addition to those shown in FIG.
[0051]
In the above embodiment, the guide rail 17 and each of the sliders 10a. It is assumed that a spherical member (not shown) is interposed between the slider 10a and the guide rail 10b. The sliders 10a and 10b are slidably mounted on the guide rail without the spherical member. May be.
[0052]
Further, as shown in FIG. 3B in the above-described embodiment, the diameter of the flange portion 20z of the bolt insertion hole 20y formed in the carriage 12 is substantially the same as the shaft diameter of the bolt 20 and the thickness of the spacer 19. Although the bolt 20 is fitted into the bolt insertion hole 20y via the spacer 19, the diameter of the flange portion 20z may be made slightly larger and a slight gap may be formed between the side wall of the flange portion 20 and the spacer 19. Good. Even in this case, the positional relationship of the sliders 10a and 10b and the carriage 12 in the mutually facing surface directions is maintained by the presence of the positioning pins 22.
[0053]
Further, in the above-described embodiment, the configuration is such that printing is performed simultaneously on the sheets 2 and 3 arranged in parallel. However, the present invention is not limited to this. May be.
[0054]
【The invention's effect】
According to the first aspect, the carriage and the head mounted thereon hardly vibrate, so that it is possible to prevent the print quality from deteriorating.
[0055]
According to the second aspect, the distance between the carriage and the slider in the fixing member insertion direction can be managed.
[0056]
According to the third aspect, the operation of fixing the slider and the carriage can be easily and accurately performed.
[0057]
According to the fourth aspect, the fixing operation can be easily performed without deteriorating the positioning accuracy.
[0058]
According to the fifth aspect, even when vibration is likely to occur due to rolling of the spherical member when the slider slides, it is possible to simply and inexpensively suppress vibration in the carriage and the head.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an ink jet printer according to an embodiment of the present invention.
FIG. 2A is a partial view showing the printing unit of FIG. 1; FIG. 2B is a partial view showing the printing unit as viewed from the left side of FIG. 2A.
FIG. 3A is a plan view illustrating a fixing portion and a positioning portion of the carriage and the slider illustrated in FIG. 2B. FIG. 3B is a cross-sectional view taken along a line BB ′ in FIG. 3A in a region surrounded by a dashed line in FIG.
[Explanation of symbols]
1 Inkjet printer (inkjet recording device)
2, 3 paper (recording medium)
6 inkjet printing unit
10a, 10b slider
11 head
12 carriage
17 Guide rail
18 O-ring (elastic body)
19 Spacer (Regulator)
20 bolts (fixing member)
21 Washer (fixing member)
20x fixing holes
20y bolt insertion hole (fixing member insertion hole)
22 Positioning pin (positioning member)
22x positioning holes
22y positioning pin receiving hole (positioning member receiving hole)

Claims (5)

A guide rail extending along the main scanning direction;
A slider slidably mounted on the guide rail,
A head mounted with a head for ejecting ink on a recording medium surface, and a carriage fixed to the slider and capable of reciprocating in the main scanning direction;
An ink jet recording apparatus, wherein the carriage is fixed to the slider via an elastic body. A fixing hole is formed on a surface of the slider facing the carriage, and a fixing member fitted to the fixing hole can be inserted into the carriage at a position corresponding to the fixing hole. A fixing member insertion hole is formed,
The fixing member penetrates the fixing member insertion hole through the elastic member disposed in the vicinity of the fixing member insertion hole and a restricting member for restricting a contraction amount of the elastic member, and the fixing hole The ink jet recording apparatus according to claim 1, wherein the carriage is fixed to the slider by being fitted to the slider. A positioning hole is formed on a surface of the slider facing the carriage, and a positioning member receiving hole is formed at a position corresponding to the positioning hole of the slider on the carriage,
The positioning relationship between the slider and the carriage in a facing surface direction is maintained by inserting a positioning member into the positioning hole and the positioning member receiving hole. 3. The ink jet recording apparatus according to 2. 4. The ink jet recording apparatus according to claim 3, wherein the slider is divided into a plurality of parts along a sliding direction with respect to the guide rail, and the positioning holes are formed in each of the divided parts. A plurality of spherical members are interposed between the guide rail and the slider, and the slider slides on the guide rail as the spherical member rolls. The inkjet recording device according to any one of the above.

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