Patent Publication Number: US-8967765-B2

Title: Liquid ejecting apparatus

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid ejecting apparatus. 
     2. Related Art 
     In the related art, as a liquid ejecting apparatus, an ink jet type recording apparatus is known in which ink (liquid) is ejected onto a recording medium from an ejecting head (liquid ejecting head) mounted on a carriage, thereby performing a desired printing process. In this ink jet type recording apparatus, a sucking operation is performed in which ink is forced to be discharged from an ejecting nozzle by a cap member coming into contact with a nozzle forming surface of the ejecting head, so as to perform a maintenance work for maintaining ink ejecting characteristics in the ejecting head (for example, refer to JP-A-2010-52382). In this sucking operation, a position of the carriage is fixed through engagement with a lock lever. 
     However, in the technique in the related art, there is a problem in that a movement amount of the lock lever which locks the carriage is the same as a vertical movement amount of the cap member, and thus the movement amount of the lock lever cannot be selectively increased. Therefore, it is desirable to provide a new technique capable of making a movement amount of a maintenance member such as the cap member different from a movement amount of the lock lever. 
     SUMMARY 
     An advantage of some aspects of the invention is to provide a liquid ejecting apparatus capable of making movement amounts of a maintenance member and a lock lever different from each other. 
     According to an aspect of the invention, there is provided a liquid ejecting apparatus including an ejecting head that has a nozzle ejecting liquid onto a medium; a carriage that holds the ejecting head and can be moved in a predetermined direction; a maintenance member that can be moved up and down with respect to a nozzle formation surface where the nozzle is formed in the ejecting head, and performs maintenance on the nozzle formation surface; a lock member that can be moved up and down with respect to the carriage and fixes a position of the carriage; and a movement member that moves the lock member and the maintenance member such that a lifting amount of the lock member is different from a lifting amount of the maintenance member. 
     According to the liquid ejecting apparatus of the first aspect of the invention, since it is possible to make lifting amounts of the lock member and the maintenance member different from each other using the movement member, for example, it is possible to relatively increase a lifting amount of the lock member with respect to the maintenance member. Therefore, it is possible to increase an engagement amount between the lock member and the carriage and to thereby favorably fix a position of the carriage. 
     The movement member may be a lever member which is rotated with respect to a predetermined fulcrum and of which a first portion which comes into contact with the maintenance member and a second portion which comes into contact with the lock member have different distances from the fulcrum. 
     With this configuration, since the first portion and the second portion have different distances from the fulcrum, it is possible to make lifting amounts of the lock member and the maintenance member different from each other with a simple configuration in which the lever member is rotated. 
     The maintenance member may be a wiping member which sweeps away the nozzle formation surface, and the first portion of the movement member may be more distant from the fulcrum than the second portion thereof. 
     With this configuration, the first portion forming a contact portion with the wiping member becomes distant from the fulcrum, and thus a lifting amount of the wiping member can be made to be more than that of the lock member. 
     The maintenance member may be a cap member which sweeps away the nozzle formation surface, and the second portion of the movement member may be more distant from the fulcrum than the first portion thereof. 
     With this configuration, the second portion forming a contact portion with the lock member is distant from the fulcrum, and thus a lifting amount of the lock member can be made to be more than that of the cap member. 
     The movement member may be a composite gear which is rotated with respect to a predetermined rotation axis and of which a first gear which comes into contact with the maintenance member and a second gear which comes into contact with the lock member have different shapes. 
     With this configuration, since the first gear and the second gear have different outer diameters, it is possible to make lifting amounts of the lock member and the maintenance member different with a simple configuration in which the composite gear is rotated. 
     The maintenance member may be a wiping member which sweeps away the nozzle formation surface, and the first gear of the composite gear may have an outer diameter larger than the second gear thereof. 
     With this configuration, the wiping member comes into contact with the first gear having the larger outer diameter and thus a lifting amount of the wiping member can be made to be more than that of the lock member. 
     The maintenance member may be a cap member which comes into contact with the nozzle formation surface, and the second gear of the composite gear may have an outer diameter larger than the first gear thereof. 
     With this configuration, the lock member comes into contact with the second gear having the larger outer diameter and thus a lifting amount of the lock member can be made to be more than that of the wiping member. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a diagram illustrating a schematic configuration of a printer according to a first embodiment. 
         FIG. 2  is a cross-sectional view of main portions illustrating a configuration of a head. 
         FIGS. 3A and 3B  are cross-sectional views illustrating a configuration of a maintenance mechanism according to the first embodiment. 
         FIGS. 4A and 4B  are cross-sectional views illustrating a configuration of a maintenance mechanism according to a second embodiment. 
         FIGS. 5A and 5B  are cross-sectional views illustrating a configuration of a maintenance mechanism according to a third embodiment. 
         FIGS. 6A and 6B  are cross-sectional views illustrating a configuration of a maintenance mechanism according to a fourth embodiment. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, embodiments of the invention will be described with reference to the drawings. In addition, in the respective drawings, the respective members have different scales such that the respective members with different sizes can be recognized. Further, in the present embodiment, an ink jet type printer (hereinafter, referred to as a printer) represented by an image recording apparatus which is a form of the liquid ejecting apparatus will be described as an example. 
     First Embodiment 
       FIG. 1  is a diagram illustrating a schematic configuration of a printer  100  according to the present embodiment. 
     The printer  100  shown in  FIG. 1  is an apparatus which transports a medium M with a sheet shape such as, for example, a paper sheet, or a plastic sheet and performs a printing process. The printer  100  includes a casing PB, an ink jet mechanism IJ which ejects ink on the medium M, an ink supply mechanism IS which supplies ink to the ink jet mechanism IJ, a transport mechanism CV which transports the medium M, a maintenance mechanism MN which performs a maintenance operation of the ink jet mechanism IJ, and a control device CONT which controls the respective mechanisms. 
     Hereinafter, an XYZ orthogonal coordinate system is set, and a positional relationship of each constituent element will be described by appropriately referring to the XYZ orthogonal coordinate system. In the present embodiment, for example, a transport direction of the medium M is indicated by an X direction, a direction perpendicular to the X direction in a transport surface of the medium M is indicated by a Y direction, and a direction perpendicular to the plane including the X axis and the Y axis is indicated by a Z direction. In addition, a rotation direction about the X axis is set as a θX direction, a rotation direction about the Y axis is set as a θY direction, and a rotation direction about the Z axis is set as a θZ direction. 
     The casing PB is formed so as to be long, for example, in the Y direction. In the casing PB, the ink jet mechanism IJ, the ink supply mechanism IS, the transport mechanism CV, the maintenance mechanism MN, and the control device CONT are installed. For example, a platen  13  is installed in the casing PB. The platen  13  is a support member which supports the medium M. The platen  13  is disposed, for example, at a central part of the casing PB in the X direction. The platen  13  has a support surface  13   a  facing in the +Z direction. The support surface  13   a  is used as a support surface which supports the medium M. 
     The transport mechanism CV has, for example, a transport roller, a motor which drives the transport roller, and the like. The transport mechanism CV transports the medium M, for example, from the −X direction of the casing PB to inside of the casing PB, and discharges the medium M from the +X direction of the casing PB to outside of the casing PB. The transport mechanism CV transports the medium M such that the medium M passes on the platen  13  inside the casing PB. A transport timing or an transport amount of the transport mechanism CV is controlled, for example, by the control device CONT. 
     The ink jet mechanism IJ includes a head H which ejects ink, and a head movement mechanism AC which holds and moves the head H. The head H ejects ink toward the medium M forwarded onto the platen  13 . The head H has an ejecting surface (nozzle forming surface) Ha which ejects ink. The ejecting surface Ha faces, for example, in the −Z direction, and is disposed so as to be opposite to, for example, the support surface  13   a  of the platen  13 . 
     The head movement mechanism AC has a carriage  4 . The head H is fixed to the carriage  4 . The carriage  4  comes into contact with a guide shaft  8  which is suspended in the longitudinal direction (X direction) of the casing PB. The head H and the carriage  4  are disposed, for example, in the +Z direction of the platen  13 . 
     The head movement mechanism AC includes not only the carriage  4 , but also, for example, a pulse motor  9 , a driving pulley  10  which is rotatably driven so as to be by the pulse motor  9 , a free-rolling pulley  11  which is provided on an opposite side to the driving pulley  10  in the width direction of the casing PB, and a timing belt  12  which is hung between the driving pulley  10  and the free-rolling pulley  11  and is connected to the carriage  4 . 
     The carriage  4  is connected to the timing belt  12 . The carriage  4  is provided so as to move in the Y direction when the timing belt  12  rotates. The carriage  4  is guided by the guide shaft  8  when moving in the Y direction. 
     The ink supply mechanism IS supplies ink to the head H. The ink supply mechanism IS accommodates, for example, a plurality of ink cartridges  6 . The printer  100  of the present embodiment has a configuration (an off-carriage type) in which the ink cartridges  6  are accommodated at a position different from that of the head H. The ink supply mechanism IS has, for example, supply tubes TB which connects the head H to the ink cartridges  6 . The ink supply mechanism IS includes a pump mechanism (not shown) which supplies ink stored in the ink cartridges  6  to the head H via the supply tubes TB. The maintenance mechanism MN is disposed at a home position of the head H. The home position is set, for example, in a region deviated from a region where printing is performed on the medium M. In the present embodiment, the home position is set on the +Y side of the platen  13 , for example. The home position is a place where the head H waits, for example, when the printer  100  is powered off, when recording is not performed for a long time, and the like. 
     The maintenance mechanism MN includes, for example, a capping mechanism CP which covers the ejecting surface Ha of the head H, a wiping mechanism WP which sweeps away the ejecting surface Ha, and the like. The capping mechanism CP is connected to a sucking mechanism SC such as, for example, a sucking pump. The capping mechanism CP covers, for example, the ejecting surface Ha, and can suck a space on the ejecting surface Ha with the sucking mechanism SC. Ink waste discharged to the maintenance mechanism MN side from the head H is recovered by, for example, a liquid waste recovering mechanism (not shown). 
       FIG. 2  is a main portion cross-sectional view illustrating a configuration of the head H. As shown in  FIG. 2 , the head H includes a head case  18 , a fluid channel unit  19 , and an actuator unit  20 . 
     The head case  18  is formed using a synthetic resin, or the like. The head case  18  is formed in a box shape so as to have, for example, a hollow portion. The head case  18  is equipped with a guiding needle unit (not shown) via a packing on the upper side thereof. The fluid channel unit  19  is adhered to the lower end surface of the head case  18 . The actuator unit  20  is accommodated in the hollow portion  37  formed inside the head case  18 . 
     A case fluid channel  25  is provided so as to penetrate in the height direction inside the head case  18 . The upper end of the case fluid channel  25  communicates with an ink guiding channel of the ink cartridge side via a packing and the guiding needle unit (not shown). The lower end of the case fluid channel  25  communicates with a common ink room  44  in the fluid channel unit  19 . For this reason, ink which is guided from the ink cartridge side is supplied to the common ink room  44  side through the case fluid channel  25 . 
     The actuator unit  20  includes, for example, a plurality of piezoelectric vibrators  38  which are disposed in a comb shape, a fixing plate  39  which holds the piezoelectric vibrators  38 , and a flexible cable  40  which supplies a driving signal from the control device CONT to the piezoelectric vibrators  38 . 
     The piezoelectric vibrators  38  are fixed such that lower end portions thereof in  FIG. 2  protrude from the lower end surface of the fixing plate  39 . As above, each of the piezoelectric vibrators  38  is installed on the fixing plate  39 , in a so-called cantilever state. The fixing plate  39  which supports the respective piezoelectric vibrators  38  is made of stainless steel which is, for example, about 1 mm thick. In the fixing plate  39 , for example, a surface different from the surface to which the piezoelectric vibrators  38  are fixed is adhered to a case inner wall surface which partitions the hollow portion  37 . 
     The fluid channel unit  19  has a vibrating plate  41 , a fluid channel substrate  42 , and a nozzle substrate  43 . The vibrating plate  41 , the fluid channel substrate  42 , and the nozzle substrate  43  are adhered to each other in a laminated state. The fluid channel unit  19  forms a series of ink fluid channels (liquid fluid channels) from the common ink room  44  to a nozzle NZ via an ink supply hole  45  and a pressure room  46 . The pressure room  46  is formed such that a direction perpendicular to an arrangement direction (nozzle string direction) of the nozzles NZ is a longitudinal direction. 
     The common ink room  44  is connected to the case fluid channel  25 . The common ink room  44  is a room to which ink from the cartridge side is guided. In addition, the common ink room  44  is connected to the ink supply hole  45 . The ink guided to the common ink room  44  is distributed to each pressure room  46  via the ink supply hole  45 . 
     The nozzle substrate  43  is disposed at a bottom of the fluid channel unit  19 . A plurality of nozzles NZ are formed in the nozzle substrate  43  at a pitch (for example, 180 dpi) corresponding to a dot formation density of an image or the like formed on the medium M. As the nozzle substrate  43 , a plate material made of metal such as, for example, stainless steel, is used. 
       FIGS. 3A and 3B  are cross-sectional views illustrating a configuration of the maintenance mechanism MN according to the present embodiment, where  FIG. 3A  shows a state in which a cap member moves downward, and  FIG. 3B  shows a state in which the cap member moves upward. As shown in  FIGS. 3A and 3B , the maintenance mechanism MN includes a main body portion  50 , a lever member (movement member)  51  which is installed so as to be rotatably moved with respect to the main body portion  50 , a cap member  52 , the wiping mechanism WP having a wiping member  53 , and a lock member  54  which fixes a position of the carriage  4 . In addition, the cap member  52  and the wiping member  53  constitute a maintenance member of the invention. 
     The lever member  51  is installed in the main body portion  50  in a state of being rotatably moved by a driving member (not shown) via a fulcrum  51   a  provided at one end thereof. A cap contact portion (a first portion)  51   b  which comes into contact with and holds the cap member  52  is provided approximately in the center of the lever member  51 . A lock contact portion (a second portion)  51   c  is provided at the other end of the lever member  51  which is bent and comes into contact with the lock member  54 . Specifically, the lever member  51  is rotatably moved with respect to the fulcrum  51   a  so as to lift up the lock contact portion  51   c  side as shown in  FIG. 3B . 
     The lock contact portion  51   c  is provided at a location more distant from the fulcrum  51   a  than the cap contact portion  51   b . With this configuration, when the lever member  51  is rotatably moved with respect to the fulcrum  51   a , an upward movement amount in the lock contact portion  51   c  which is distant from the fulcrum  51   a  can be made to be larger than an upward movement amount in the cap contact portion  51   b . In other words, the lever member  51  realizes a configuration in which movement amounts (lifting amounts) in the cap member  52  and the lock member  54  are different from each other. 
     In addition, the lock contact portion  51   c  is located at a position more distant upward (in the Z direction) from the bottom surface  50   a  of the main body portion  50  than the fulcrum  51   a  and the cap contact portion  51   b  in a state in which the lever member  51  is installed in the main body portion  50 . Thereby, the lock contact portion  51   c  can be moved upward to a higher position than the cap contact portion  51   b  when the lever member  51  is rotatably moved. Therefore, the front end part of the lock member  54  which comes into contact with and is held by the lock contact portion  51   c  is moved upward to a high position. 
     The cap member  52  is formed by a frame-shaped member which comes into contact with the ejecting surface Ha of the head H, and can perform a sucking process in which pressure is reduced by driving the sucking mechanism SC (refer to  FIG. 1 ) in a state of air-tightly closing the ejecting surface Ha, and thus ink is forced to be discharged from the nozzles NZ. An ink absorption body  56  which absorbs ink waste discharged from the nozzles NZ through the sucking process is provided inside the cap member  52 . The cap member  52  can be moved up and down by the lever member  51  described later. 
     The cap member  52  is held by a cap guiding portion  55  of which one end is provided in the inner surface of the main body portion  50 . The cap member  52  can be moved in a vertical direction by the cap guiding portion  55  without rattling. 
     The cap member  52  has a protrusion  52   a  which comes into contact with the above-described cap contact portion  51   b  of the lever member  51 . The protrusion  52   a  is formed by a cylindrical member, and the cylindrical surface thereof comes into contact with the cap contact portion  51   b  formed in a plate shape. Thereby, even in a case where the lever member  51  is rotatably moved and thus a position of the cap contact portion  51   b  varies, the protrusion  52   a  maintains a state of coming into contact with the surface of the cap contact portion  51   b.    
     With this configuration, when the lever member  51  is rotatably moved with respect to the fulcrum  51   a  and thereby a position of the cap contact portion  51   b  is moved upward, the protrusion  52   a  is the cap member  52  is pushed up, and, simultaneously, the cap member  52  is guided by the cap guiding portion  55  so as to be moved upward. Thereby, the cap member  52  can come into contact with the ejecting surface Ha of the head H located at the home position. 
     The wiping mechanism WP has the wiping member  53  which sweeps away the ejecting surface Ha, and a driving mechanism  59 . The wiping member  53  is used to remove ink waste attached to the ejecting surface Ha due to the above-described sucking operation, by performing the wiping operation for sweeping away the ejecting surface Ha. The driving mechanism  59  moves up and down the wiping member  53  with respect to the upper surface of the main body portion  50 . The wiping member  53  is formed by an elastic member such as, for example, an elastomer, and prevents the ejecting surface Ha from being damage. In addition, the wiping mechanism WP is provided with the driving mechanism  59  and thereby can be driven independently from a lifting operation of the capping mechanism CP and the lock member  54  which are moved up and down due to the rotatable movement operation of the lever member  51 . 
     The lock member  54  has a bent portion  54   a  which is bent approximately in an L shape in the lower end part, and the bent portion  54   a  comes into contact with the lock contact portion  51   c  of the lever member  51 . In addition, a spring member  57  is provided between a lower surface of the bent portion  54   a  and the bottom surface  50   a  of the main body portion  50 . Thereby, the lock member  54  is in a state of being biased upward by the spring member  57 . 
     The lock member  54  is held by a lock guiding portion  58  of which one end side is provided at the inner surface of the main body portion  50 . The lock member  54  can be moved by the lock guiding portion  58  in the vertical direction without rattling. 
     With this configuration, when the lever member  51  is rotatably moved with respect to the fulcrum  51   a  such that a position of the lock contact portion  51   c  is moved upward, the lock member  54  is guided in the lock guiding portion  58  by a biasing force of the spring member  57  and is thus moved upward. When the lever member  51  is rotatably moved, as shown in  FIG. 3B , the lock member  54  is inserted into a recess portion  4   b  provided in a lower surface  4   a  of the carriage  4  so as to be engaged with the carriage  4 . Thereby, the carriage  4  is fixed to the capping mechanism CP held in the printer  100  (the casing PB) by the lock member  54 . In the above-described way, the lock member  54  can fix a position of the carriage  4  which holds the head H located at the home position. Therefore, it is possible to remove rattling of the head H when the cap member  52  comes into contact with the ejecting surface Ha of the head H and to thereby favorably perform the above-described capping operation. 
     Next, an operation of the printer  100  with the above-described configuration will be described. In addition, in the following description, an operation of the capping mechanism CP which is a feature of the present specification will be described mainly. 
     When a job command for starting printing is input, the control device CONT drives the transport mechanism CV so as to transport the medium M, and applies a voltage to the piezoelectric vibrators  38  so as to drive the head H. Thereby, the head H ejects ink onto a predetermined position of the medium M which is transported directly thereunder by the transport mechanism CV from the nozzles NZ, thereby performing a desired printing process. 
     In the printer  100 , the ink supply mechanism IS supplies ink to the head H from the ink cartridges  6  during the printing process. Thereby, the printer  100  can continue to perform the printing process by continuously ejecting ink onto the medium M. 
     In the printer  100 , in order to maintain the ink ejecting characteristics of the head H, for example, when the printer  100  is initially driven or a predetermined time has elapsed, a maintenance process by the maintenance mechanism MN is performed. 
     The control device CONT drives the maintenance mechanism MN in accordance with maintenance timing of the head H. The control device CONT moves the carriage  4  on which the head H is mounted to an above position of the maintenance mechanism MN disposed at the home position. 
     The control device CONT rotatably moves the lever member  51  with respect to the fulcrum  51   a  after the ejecting surface Ha of the head H faces the cap member  52  of the capping mechanism CP. The cap contact portion  51   b  of the lever member  51  pushes up the protrusion  52   a  of the cap member  52 . Thereby, the cap member  52  comes into contact with the ejecting surface Ha. 
     In addition, the lock contact portion  51   c  pushes up the bent portion  54   a  of the lock member  54  due to the rotatable movement operation of the lever member  51 . Thereby, the lock member  54  is moved upward and is thus inserted into the recess portion  4   b  provided in the lower surface  4   a  of the carriage  4  so as to be engaged with the carriage  4 . Thereby, the lock member  54  can fix a position of the carriage  4 . 
     In the present embodiment, the lock contact portion  51   c  is provided at a location more distant from the fulcrum  51   a  than the cap contact portion  51   b . For this reason, when the lever member  51  is rotatably moved with respect to the fulcrum  51   a , it is possible to increase a movement amount of the lock member  54  by the lock contact portion  51   c  distant from the fulcrum as compared with that of the cap member  52  by the cap contact portion  51   b . Therefore, the lock member  54  can be inserted into a deep position inside the recess portion  4   b  of the carriage  4  by increasing a lifting amount of the lock member  54  without increasing a lifting amount of the cap member  52 . Accordingly, the lock member  54  is reliably engaged with the carriage  4 , and thus it is possible to reliably hold a position of the carriage  4 . 
     After the cap member  52  comes into contact with the ejecting surface Ha of the head H, the control device CONT drives the sucking mechanism SC (refer to  FIG. 1 ). The space formed between the cap member  52  and the ejecting surface Ha is reduced in pressure and is in a negative pressure state. Thereby, ink can be discharged into the cap member  52  from the nozzles NZ. The ink waste discharged into the cap member  52  is absorbed by the ink absorption body  56 . The cap member  52  provided with the ink absorption body  56  which has absorbed the ink waste comes into contact with the ejecting surface Ha, thereby moisturizing the nozzles NZ formed in the ejecting surface Ha. 
     When the sucking operation finishes, the control device CONT moves the lever member  51  downward. The cap member  52  is moved downward along the cap guiding portion  55  due to the downward movement of the lever member  51  (the cap contact portion  51   b ), and returns to the initial position shown in  FIG. 3A . 
     In addition, the lock member  54  is moved downward along the lock guiding portion  58  due to the downward movement of the lever member  51  (the lock contact portion  51   c ) and returns to the initial position shown in  FIG. 3A . At this time, the spring member  57  is pinched between the bent portion  54   a  and the main body portion  50  so as to be crushed. 
     As described above, according to the present embodiment, lifting amounts of the lock member  54  and the cap member  52  can be made to be different from each other by the lever member  51  so as to increase an engagement amount between the lock member  54  and the carriage  4 , thereby favorably fixing a position of the carriage  4 . 
     In addition, since, in the lever member  51 , distances of the cap contact portion  51   b  and the lock contact portion  51   c  from the fulcrum  51   a  are different from each other, it is possible to make lifting amounts of the lock member  54  and the cap member  52  different from each other with a simple configuration in which the lever member  51  is rotated. 
     Second Embodiment 
     Next, the second embodiment related to the printer  100  will be described. A difference between the present embodiment and the first embodiment is a peripheral structure of the maintenance mechanism MN, and the other configurations are common. Therefore, hereinafter, only a peripheral configuration of the maintenance mechanism MN will be described, and description of the other configurations will be omitted or be made briefly. In addition, the same constituent elements and members as in the first embodiment are given the same reference numerals and are described. 
       FIGS. 4A and 4B  are cross-sectional views illustrating a configuration of a maintenance mechanism MN according to the present embodiment, where  FIG. 4A  shows a state in which a cap member is moved upward, and  FIG. 4B  shows a state in which the cap member is moved downward. The maintenance mechanism MN according to the present embodiment includes, as shown in  FIGS. 4A and 4B , a gear portion  60  used as a movement member instead of the above-described lever member  51 , a cap member  52 , and a lock member  54 . In addition, in  FIGS. 4A and 4B , the wiping mechanism WP and the main body portion  50  are not shown. 
     The gear portion  60  includes a first gear  60   a  and a second gear  60   b  formed by spur gears. The first gear  60   a  and the second gear  60   b  are fixed so as to be rotated about the same axis with respect to a rotation shaft  61 . The first gear  60   a  has a smaller outer diameter than the second gear  60   b . The first gear  60   a  and the second gear  60   b  are the same module as each other. In other words, the second gear  60   b  with the larger outer diameter has more teeth than the first gear  60   a.    
     The first gear  60   a  meshes with a first rack member  62 . One end side of the first rack member  62  is fixed to the side surface of the cap member  52 . The first gear  60   a  is rotated in a predetermined direction (for example, a counterclockwise direction in  FIG. 4A ) so as to move the first rack member  62  upward. 
     The second gear  60   b  meshes with a second rack member  63 . The second gear  60   b  is rotated in a predetermined direction (for example, a counterclockwise direction in  FIG. 4A ), and thereby one end side of the second rack member  63  is inserted into the recess portion  4   b  provided in the bottom of the carriage  4  and is engaged with the carriage  4 . In other words, one end part of the second rack member  63  forms a lock member  63   a.    
     With this configuration, when the first gear  60   a  and the second gear  60   b  are rotated about the rotation shaft  61 , the first rack member  62  and the second rack member  63  can be moved up and down. Here, since the first gear  60   a  and the second gear  60   b  have different shapes, lifting amounts of the first rack member  62  and second rack member  63  can be made to be different from each other. In other words, the number of teeth at which the second gear  60   b  rotated by a certain angle meshes with the second rack member  63  is larger than the number of teeth at which the first gear  60   a  rotated by the same angle meshes with the first rack member  62 . Therefore, when the gear portion  60  is rotated about the rotation shaft  61 , an upward movement amount of the second rack member  63  (the lock member  63   a ) can be made to be larger than an upward movement amount of the first rack member  62  (the cap member  52 ). 
     Third Embodiment 
     Next, the third embodiment related to the printer  100  will be described. A difference between the present embodiment and the first embodiment is a peripheral structure of the maintenance mechanism MN, and the other configurations are common. Therefore, hereinafter, only a peripheral configuration of the maintenance mechanism MN will be described, and description of the other configurations will be omitted or be made briefly. In addition, the same constituent elements and members as in the first embodiment are given the same reference numerals and are described. 
       FIGS. 5A and 5B  are cross-sectional views illustrating a configuration of a maintenance mechanism MN according to the present embodiment, where  FIG. 5A  shows a state in which a lock member  154  is slightly moved upward, and  FIG. 5B  shows a state in which the lock member  154  is completely moved downward. The maintenance mechanism MN according to the present embodiment includes, as shown in  FIGS. 5A and 5B , a lever member  151  which moves up and down the lock member  154  and a wiping member  153 , and a main body portion  50 . In addition, in the present embodiment, the cap member  52  is moved up and down by a driving portion different from that of the lever member  151 . 
     The lever member  151  is installed in the main body portion  50  in a state of being rotatably moved by a driving member (not shown) via a fulcrum  51   a  provided at one end thereof. A lock contact portion (a second portion)  151   c  which comes into contact with the lock member  154  is provided around the fulcrum  51   a  of the lever member  151 . A wiping member contact portion (a first portion)  151   b  which comes into contact with the wiping member  153  is provided at the other end of the lever member  151 . Specifically, the lever member  151  is rotatably moved with respect to the fulcrum  51   a  so as to lift up the wiping member contact portion  151   b  side as shown in  FIG. 5B . 
     The wiping member contact portion  151   b  is provided at a location more distant from the fulcrum  51   a  than the lock contact portion  151   c . With this configuration, when the lever member  151  is rotatably moved with respect to the fulcrum  51   a , an upward movement amount in the wiping member contact portion  151   b  which is distant from the fulcrum  51   a  can be made to be larger than an upward movement amount in the lock contact portion  151   c . In other words, the lever member  151  realizes a configuration in which movement amounts (lifting amounts) in the wiping member  153  and the lock member  154  are different from each other. 
     In addition, the wiping member contact portion  151   h  is located at a position more distant upward (in the Z direction) from the bottom surface  50   a  of the main body portion  50  than the fulcrum  51   a  and the lock contact portion  151   c  in a state in which the lever member  151  is installed in the main body portion  50 . Thereby, the wiping member contact portion  151   b  can be moved upward to a higher position than the lock contact portion  151   c  when the lever member  51  is rotatably moved. Therefore, as described later, when the lever member  151  is slightly rotated, an upward movement amount of the lock member  154  is suppressed so as to be prevented from coming into contact with the ejecting surface Ha and to move the wiping member  153  to a position which can come into contact with the ejecting surface Ha. 
     The wiping member  153  is held by a wiping guiding portion  155  of which one end is provided in the inner surface of the main body portion  50 . The wiping member  153  can be moved in the vertical direction by the wiping guiding portion  155  without rattling. 
     The wiping member  153  has a bent portion  153   a  which is bent approximately in an L shape in the lower end part, and the bent portion  153   a  comes into contact with the wiping member contact portion  151   b  of the lever member  151 . In addition, a spring member  57  is provided between a lower surface of the bent portion  153   a  and the bottom surface  50   a  of the main body portion  50 . Thereby, the wiping member  153  is in a state of being biased upward by the spring member  57 . 
     The lock member  154  is held by a lock guiding portion  158  of which one end side is provided at the inner surface of the main body portion  50 . The lock member  154  can be moved by the lock guiding portion  158  in the vertical direction without rattling. 
     The wiping member  153  is disposed at a position where the front end part thereof can come into contact with the ejecting surface Ha of the head H in a state (refer to  FIG. 5A ) in which the lever member  151  is slightly rotatably moved with respect to the fulcrum  51   a . Thereby, the carriage  4  is moved such that the wiping member  153  sweeps away the ejecting surface Ha. As such, the front end of the lock member  154  is located on a lower side than the front end of the wiping member  153  and the ejecting surface Ha in a state in which the lever member  151  is slightly rotatably moved. Therefore, it is possible to prevent the lock member  154  from coming into contact with the ejecting surface Ha in a case of the carriage  4  moves the head H so as to perform a wiping operation on the ejecting surface Ha as well. 
     On the other hand, when the lever member  151  is rotatably moved with respect to the fulcrum  51   a  and thus a position of the lock contact portion  151   c  is moved to the upper end, the lower end part of the lock member  154  is pushed up, and thus the lock member  154  is guided in the lock guiding portion  158  and is thus moved upward. Thereby, it is possible to insert the front end part of the lock member  154  into the recess portion  4   b  provided in the lower surface  4   a  of the carriage  4  which holds the head H located at the home position (refer to  FIG. 5B ). 
     At this time, since the wiping member  153  is at a position spaced apart from the carriage  4 , the wiping member  153  does not come into contact with the carriage  4 . In addition, a position of the carriage  4  is fixed by the lock member  154  so as to move up and down the cap member  52 , thereby preventing occurrence of rattling when the cap member  52  comes into contact with the ejecting surface Ha and to thereby favorably perform the sucking operation for discharging ink from the nozzles NZ. 
     Fourth Embodiment 
     Next, the fourth embodiment related to the printer  100  will be described. A difference between the present embodiment and the second embodiment is a peripheral structure of the maintenance mechanism MN, and the other configurations are common. Specifically, the present embodiment is a combination of the configuration of the gear portion  60  related to the second embodiment and the configuration of making lifting amounts of the wiping member and the lock member different from each other, related to the third embodiment. In addition, hereinafter, only a peripheral configuration of the maintenance mechanism MN will be described, and description of the other configurations will be omitted or be made briefly. Further, the same constituent elements and members as in the second and third embodiments are given the same reference numerals and are described. 
       FIGS. 6A and 6B  are cross-sectional views illustrating a configuration of a maintenance mechanism MN according to the present embodiment, where  FIG. 6A  shows a state in which a carriage is locked, and  FIG. 6B  shows a state in which a wiping process is performed. The maintenance mechanism MN according to the present embodiment includes, as shown in  FIGS. 6A and 6B , a gear portion  160  used as a movement member instead of the above-described lever member  51 , a first rack member  162 , and a second rack member  163 . In addition, in the present embodiment, the cap member  52  performs a lifting operation using a driving portion different from the lever member  151 . 
     A first gear  160   a  meshes with the first rack member  162 . The first gear  160   a  is rotated in a predetermined direction (for example, a counterclockwise direction in  FIG. 6A ) such that a lock member  162   a  provided at one end of the first rack member  162  is inserted into the recess portion  4   b  provided in the bottom of the carriage  4  and thus the first rack member  162  is engaged with the carriage  4 . 
     In addition, a second gear  160   b  is meshed with the second rack member  163 . The second gear  160   b  is rotated in a predetermined direction (for example, a counterclockwise direction in  FIG. 6B ) such that a wiping member  163   a  provided at one end side of the second rack member  163  comes into contact with the ejecting surface Ha of the head H. The carriage  4  and the wiping member  163   a  are relatively moved in this state, and thereby it is possible to perform a wiping process in which the wiping member  163   a  sweeps away the ejecting surface Ha. 
     With the configuration according to the present embodiment, in the same manner as in the configuration according to the third embodiment, when the gear portion  160  is rotated about the rotation shaft  161 , it is possible to make an upward movement amount of the first rack member  162  (the lock member  162   a ) different from an upward movement amount of the second rack member  163  (the wiping member  163   a ). 
     In addition, the invention is not limited to the above-described embodiments, and may be appropriately changed in the scope without departing from the spirit of the invention. 
     For example, although, in the above-described embodiments, the lever member or the gear portion has been exemplified as a movement member for making lifting amounts of the cap member or the wiping member and the lock member, the invention is not limited thereto. For example, a configuration may be employed in which, for example, a plurality of gears are disposed in multiple stages instead of composite gears as a movement member, and a reduction gear ratio is used, thereby making lifting amounts of the cap member or the wiping member and the lock member different. 
     In addition, although, in the present embodiment, a case where the liquid ejecting apparatus is the printer  100  has been described as an example, the invention is not limited thereto. Apparatuses such as a copier and a facsimile may be employed. 
     Further, as the liquid ejecting apparatus, a recording apparatus which ejects fluids other than ink may be used. The invention is applicable to a variety of recording apparatus having a recording head or the like which ejects, for example, a very small amount of droplet. In addition, the droplet refers to a state of being liquid ejected from the recording apparatus, and also include droplet leaving a trail in a granular, tear, or filamentous form. Further, the liquid described herein may be a material which can be ejected by a recording apparatus. For example, the liquid may include a substance which is in a liquid phase, a flow regime such as a liquid body, sol, or gel water with high or low viscosity, and other inorganic solvent, organic solvent, a solution, a liquid resin, or a liquid metal (metallic melt), and, further includes, in addition to the liquid as one state of a substance, a substance in which functional material particles formed from pigments or metal particles are melt, dispersed or mixed in a solvent. In addition, a representative example of the liquid may be ink (UV curable ink) as described in the embodiments, but ink may not be of UV curable type as long as the ink has high viscosity. Further, the medium M may include paper or a plastic film such as a vinyl chloride based film as well as functional paper which is thin and thermally expands, a substrate, a metal plate, or the like. 
     The entire disclosure of Japanese Patent Application No. 2012-044504, filed Feb. 29, 2012, is expressly incorporated by reference herein.