JP5246198B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus including a recording head that discharges liquid.

  Generally, a line-type ink jet printer having an ink jet head attached to a support member fixed to a printer body, which has a discharge surface elongated in the main scan direction in which the discharge ports are arranged along the main scan direction. It has been known. As a method for fixing the inkjet head to the support member, for example, in Patent Document 1, a bolt is screwed into a bolt hole formed at both ends of the inkjet head in the longitudinal direction, a bolt hole formed in the support member, and a nut. A method of fixing them is disclosed.

JP 2007-112067 A

  However, as described above, when both ends of a long recording head are fixed with bolts, a large torque acts on the recording head due to the tightening force of the bolts. Due to the action of this torque, there arises a problem that the position of the recording head relative to the support member is shifted. In order to solve this problem, for example, a method of providing a pressing member for fixing the recording head between the supporting members without fixing both ends of the recording head with bolts is conceivable. At this time, if the pressing member is provided so as to press between the support points of the recording head support member, the size of the recording head in the longitudinal direction of the recording head can be reduced. However, since the pressing member presses between the support points of the recording head, the discharge surface may bend convexly, the parallelism of the discharge surface is disturbed, and the quality of the image formed on the recording medium is degraded. .

  Therefore, an object of the present invention is to provide a recording apparatus capable of adjusting the parallelism of the ejection surface.

  The recording apparatus of the present invention includes a recording head having a discharge surface that is long in one direction in which a plurality of discharge ports for discharging a liquid are arranged along one direction, and both ends outside the discharge surface with respect to the one direction. A recording apparatus comprising: a support member having a plurality of support portions that support the recording head from a direction facing the ejection surface; and a fixing mechanism that fixes the recording head to the support member. A rotation mechanism that is rotatable with respect to an axis parallel to the ejection surface perpendicular to the one direction so that a fixing mechanism can take a fixing position for fixing the recording head and a release position for releasing the fixing of the recording head. A moving member and a rotating member provided on the rotating member, and pressing a region located inside a support point supported by the plurality of supporting portions of the recording head when the rotating member is at the fixed position. The above A plurality of pressing portions that are fixed between the plurality of support portions with the recording head interposed therebetween, and a fixing region that is fixed to an area inside the pressing points pressed by the plurality of pressing portions of the recording head. And a change mechanism capable of changing a separation distance between the discharge surface corresponding to the rotation surface and the rotating member arranged at the fixed position.

  According to the recording apparatus of the present invention, since the changing mechanism is provided, the rotating member is arranged at a fixed position, and the recording head is sandwiched and fixed by the plurality of support portions and the pressing portion, so that the ejection surface is convex. Even if it bends, it becomes possible to change the separation distance between the ejection surface corresponding to the fixed area of the recording head and the rotation member, and to adjust the parallelism of the ejection surface.

It is a schematic side view which shows the internal structure of the inkjet printer by one Embodiment of this invention. 2A and 2B are diagrams illustrating a state in which the recording head illustrated in FIG. 1 is supported by a support frame and fixed by a fixing mechanism, in which FIG. 1A is a top view and FIG. 2B relates to a line II-II illustrated in FIG. It is sectional drawing. It is sectional drawing along the width direction of the inkjet head shown in FIG. It is sectional drawing regarding the IV-IV line shown in FIG. It is an enlarged view of the area | region enclosed with the dashed-dotted line shown in FIG. (A) is a fragmentary sectional view of the actuator unit shown in FIG. FIG. 4B is a partial plan view of the actuator unit. It is sectional drawing regarding the VII-VII line shown in FIG.2 (b). It is a figure which shows the procedure at the time of attaching a head to the support frame shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the ink jet printer 301 of this embodiment is a line type printer, and has a rectangular parallelepiped housing 301a. Within the housing 301a, four inkjet heads 1 (hereinafter referred to as “recording head 1”), a transport mechanism 316 that transports the paper P in the transport direction (the direction from the left to the right in FIG. 1), and the paper A paper feed unit 301b for feeding P, a guide unit for guiding paper P, and a tank unit 301c for storing ink are provided. At a position that does not interfere with these mechanism units, a control unit 300 that controls the operation of each mechanism unit is arranged. In addition, a paper discharge unit 315 for discharging the paper P is provided on the top plate of the housing 301a.

  The control unit 300 controls a series of image forming operations on the paper P based on image data supplied from the outside. At the time of image formation, the control unit 300 performs a preparation operation related to image formation, a paper P supply / conveyance / discharge operation, an ink ejection operation synchronized with the conveyance, a recovery / maintenance operation of ejection characteristics, and the like.

  Each of the four recording heads 1 is a line head that is long in the main scanning direction, and has a substantially rectangular parallelepiped shape. The recording heads 1 are supported by the housing 301a by a support frame (support member) 2 and are arranged at a predetermined pitch in the sub-scanning direction. The recording head 1 includes a filter unit 7, a reservoir unit 8, a flow path unit 9, and four actuator units 121. During image formation, magenta, cyan, yellow, and black inks are ejected from the lower surfaces (ejection surfaces 9a) of the four recording heads 1. A more specific configuration of the recording head 1 will be described later.

  As shown in FIG. 2, the support frame 2 includes a frame body and a fixing mechanism 3. The frame body supports the recording head 1 from below, and the fixing mechanism 3 fixes the recording head 1 to the frame body from above. The frame body includes two side plates 21 that are erected and a bottom plate 23 that is passed between the side plates 21. The bottom plate 23 is disposed on both sides in the main scanning direction below the side plate 21 and sandwiches the recording head 1. As shown in FIG. 2B, a support portion 23a is formed on each bottom plate 23. The support portion 23a supports the end portion in the main scanning direction of the recording head 1 from the direction facing the ejection surface 9a. From the opening 23b between the two bottom plates (support portions 23a), the recording head 1 exposes the ejection surface 9a downward.

  The fixing mechanism 3 includes a rotating member 31. The rotating member 31 is supported so as to be rotatable above one end in the longitudinal direction of the side plate 21, and sandwiches the recording head 1 up and down together with the support portion 23a. The fixing mechanism 3 can be displaced between two positions (described later: a fixing position and a releasing position), and the recording head 1 is detachably supported by the support frame 2.

  As shown in FIG. 1, the conveyance unit 316 includes belt rollers 306 and 307 and an endless conveyance belt 308 wound between both rollers 306 and 307, a nip roller 304 disposed outside the conveyance belt 308, and A peeling plate 305, a rectangular parallelepiped platen 318 and the like disposed inside the conveyor belt 308 are provided. The conveyor belt 308 is tensioned by a tension roller 310.

  The belt roller 307 is a driving roller and is rotated clockwise in FIG. 1 by a transport motor (not shown). At this time, the conveyor belt 308 travels along the thick arrow. The belt roller 306 is a driven roller and rotates clockwise in FIG. 1 as the transport belt 308 travels. The nip roller 304 is disposed to face the belt roller 306, and presses the paper P supplied from the preceding guide portion against the outer peripheral surface 308 a of the transport belt 308. The outer peripheral surface 308a has weak adhesiveness by silicon treatment. The peeling plate 305 is disposed to face the belt roller 307, peels the paper P from the outer peripheral surface 308a, and guides the paper P to the subsequent guide portion. The platen 318 is disposed opposite to the four heads 1 and supports the upper loop of the conveyor belt 308 from the inside. As a result, a predetermined gap suitable for image formation is formed between the outer peripheral surface 308a and the ejection surface 9a of the recording head 1.

  The guide unit includes an upstream guide portion (front guide portion) and a downstream guide portion (rear guide portion) with the transport unit 316 interposed therebetween. The upstream guide portion has two guides 313 a and 313 b and a pair of feed rollers 314. The guide unit connects a paper feed unit 301b (described later) and the transport unit 316. The downstream guide portion has two guides 329 a and 329 b and two pairs of feed rollers 328. The guide unit connects the transport unit 316 and the paper discharge unit 315.

  The paper feed unit 301b is detachably arranged with respect to the housing 301a. The paper feed unit 301 b includes a paper feed tray 311 and a paper feed roller 312. The paper feed tray 311 is a box that opens upward, and stores a plurality of papers P. The paper feed roller 312 feeds the uppermost paper P in the paper feed tray 311 and supplies it to the upstream guide unit.

  Here, the sub-scanning direction is a direction parallel to the transport direction when the paper P is transported in the transport unit 316, and the main scanning direction is a direction parallel to the horizontal plane and perpendicular to the transport direction.

  The tank unit 301c houses four main tanks 317 inside. The main tank 317 is detachably attached to the tank unit 301c. Each main tank 317 stores cyan, magenta, yellow, and black ink, and supplies the ink to the corresponding recording head 1 via an ink tube (not shown).

  As shown in FIG. 1, a conveyance path along a black arrow is formed inside the printer 301. As a whole, the path is an S-shaped path that is reversed left and right. When the paper P fed from the lower paper feed unit 301b passes through the four recording heads 1, ink is sequentially ejected under the control of the control unit 300, and a desired color image is formed. The paper P on which the image is formed is sent out from the transport mechanism 316. Further, the sheet P is conveyed upward by two pairs of feed rollers 328 and is discharged from the discharge port 322 at the top of the housing 301a to the paper discharge unit 315.

  Next, the configuration of the recording head 1 will be described with reference to FIGS. In FIG. 2B, the flow path forming member 10 having the filter unit 7, the reservoir unit 8 and the head body 70 of the recording head 1 is indicated by a broken line. In the following description, the longitudinal direction (main scanning direction) of the recording head 1 is simply referred to as “longitudinal direction”, and the width direction (sub-scanning direction) of the recording head 1 is simply referred to as “width direction”.

  As shown in FIGS. 2B and 3, the recording head 1 includes a cover body, a flow path forming member 10, and an electrical member. A cover body covers an electrical component member with a part of flow-path formation member 10, and protects from the outside. The flow path forming member 10 is a laminated body in which an ink flow path is formed, and is filled with ink from the main tank 317. The electrical member is an electrical component group that ejects ink in the ink flow path, and its operation is controlled by the control unit 300.

  As shown in FIG. 3, the cover body includes a lower housing 5 including a heat sink 98, an upper housing 6, and a head cover 99. The lower housing 5 is a box that opens up and down across a flat plate portion. The lower housing 5 is made of PBT / ABS (polybutylene terephthalate / acrylonitrile butadiene styrene) resin. In the figure, the lower half of the flow path forming member 10 is housed in the lower box (recess 5a). The upper half of the flow path forming member 10 is accommodated in the upper box (recess 5b). Both halves are connected via a through hole (not shown) formed in the flat plate portion of the lower housing 5. The upper box portion has a cutout portion 5c formed in a side wall extending in the longitudinal direction, and an aluminum heat sink 98 having high thermal conductivity is attached thereto. The upper housing 6 is fixed to the upper box portion and the upper end surface of the heat sink 98, and seals the recess 5b from above. The head cover 99 is a box that opens downward in the drawing, and forms a closed space together with the upper housing 6. A part of the electrical component (for example, the control board 95) is accommodated in the closed space. As a result, the ink mist can be prevented from entering from the outside, and an electrical failure does not occur in the electrical member. The heat sink 98 is thermally connected to a driver IC 96 described later.

  The flow path forming member 10 is a laminated body in which the upper half filter unit 7 and the lower half reservoir unit 8 and the head body 70 are laminated. The head body 70 includes an actuator unit 121 that is also an electrical component.

  The filter unit 7 is a long resin molded member in the longitudinal direction, and an ink tube is connected to one end thereof. A filter portion (not shown) is formed in the middle of the internal ink flow path. The ink supplied from the main tank 317 via the tube is filtered by the filter unit and supplied to the downstream reservoir unit 8.

  The reservoir unit 8 is a laminated body of three stainless steel plates 91 to 93, and has a rectangular parallelepiped shape as a whole. A plurality of recesses 93 a are formed on the lower surface of the plate 93. The recess 93 a forms a gap 90 with the flow path unit 9. On the side surface of the reservoir unit 8, four openings 90a of the gap 90 are formed at equal intervals in a staggered manner along the longitudinal direction. An ink reservoir 72 for storing ink is formed inside the reservoir unit 8 and ink from the filter unit 7 is stored. An ink outflow passage 73 communicating with the ink reservoir 72 is formed in the convex portion defined by the concave portion 93a, and is open to the front end surface. Only one ink outflow channel 73 is shown in FIG. 3, but there are ten ink outflow channels 73 in this embodiment. In addition, the front end surface of a convex part is a joint surface with the flow path unit 9 (after-mentioned).

  As shown in FIG. 3, the head body 70 includes a flow path unit 9 and an actuator unit 121. 4 and 5, for convenience of explanation, the pressure chamber 110, the aperture 112, and the discharge port 108 that are to be drawn with broken lines below the actuator unit 121 are drawn with solid lines.

  The flow path unit 9 is a laminated body of nine stainless steel plates 122 to 130, and has a rectangular parallelepiped shape as a whole. The lower surface of the flow path unit 9 is a discharge surface 9a in which a large number of discharge ports 108 are opened. The upper surface of the flow path unit 9 is a plane on which a large number of pressure chambers 110 (see FIG. 4) and ten ink supply ports 105a are opened. On the upper surface, the convex portion of the plate 93 is joined corresponding to the ink supply port 105a, and the actuator unit 121 is joined corresponding to the pressure chamber group (collection of the plurality of pressure chambers 110). As a result, the ink supply port 105 a communicates with the ink outflow channel 73 of the reservoir unit 71. The actuator unit 121 is also a wall member of the flow path, and seals the openings of the plurality of pressure chambers 110. Inside the flow path unit 9, an ink flow path (not shown) that reaches the discharge port 108 through the ink supply port 105 a, the manifold flow path 105, the sub-manifold flow path 105 a, the throttle (aperture) 112, and the pressure chamber 110. Is formed.

  The actuator unit 121 is a substantially trapezoidal sheet-like member in plan view, and is a laminate of three piezoelectric sheets 141 to 143 as shown in FIG. The piezoelectric sheets 141 to 143 are made of a lead zirconate titanate (PZT) ferroelectric ceramic material. The four actuator units 121 are accommodated in a gap 90 formed by the concave portion 93 a of the plate 93 and the upper surface of the flow path unit 9.

  On the upper surface of the piezoelectric sheet 141, as shown in FIG. 6B, a plurality of individual electrodes 135 are formed so as to face the pressure chamber 110. The individual electrode 135 has a substantially rhombus shape, and individual bumps 136 are formed at the tip portion drawn from one acute angle portion of the rhombus. The individual bump 136 is connected to the wiring pattern of the COF 97, and a drive signal is selectively supplied. A common electrode 134 is formed on the entire surface of the sheet between the piezoelectric sheet 141 and the piezoelectric sheet 142. The common electrode 134 is at ground potential.

  Here, the piezoelectric sheet 141 is polarized in the thickness direction. When the individual electrode 135 has a potential different from that of the common electrode 134, an electric field is generated in the polarization direction. The electric field application portion (active portion) of the piezoelectric sheet 141 is distorted by the piezoelectric effect. On the other hand, the piezoelectric sheets 142 and 143 are not spontaneously displaced even at the portion corresponding to the individual electrode 135 (inactive portion). Such a combination part functions individually as a so-called unimorph type piezoelectric actuator, and the actuator unit 121 has the same number of actuators as the pressure chambers 110. Each piezoelectric actuator is deformed by a drive signal and selectively applies pressure (discharge energy) to the ink in the pressure chamber 110.

  The electrical member includes a control board 95 and a COF 97 in addition to the actuator unit 121 described above. The control board 95 has a plurality of electronic components mounted thereon, and outputs print data. The COF 97 is a flat flexible board on which a driver IC 96 is mounted in the middle. One end of the COF 97 is connected to the connector 95 a of the control board 95 and the other end is joined to the upper surface of the actuator unit 121. The COF 97 is drawn upward through the opening 90 a of the gap 90, the notch 94 of the lower housing 5, and the slit 6 a of the upper housing 6. When print data is output from the control board 95, a drive signal is output from the driver IC 96 to the actuator unit 121. The driver IC 96 dissipates heat during driving by the heat sink 98.

  Here, a driving method of the actuator unit 121 will be described. For example, if the polarization direction is the same as the electric field application direction, the active portion contracts in a direction (plane direction) perpendicular to the polarization direction. At this time, since the piezoelectric layers 142 and 143 are not spontaneously deformed, a difference in strain in the plane direction occurs between the active portion and the piezoelectric layers 142 and 143. Due to the difference in strain, the entire piezoelectric sheets 141 to 143 are deformed (unimorph deformation) so as to be convex toward the pressure chamber 110. As a result, pressure (discharge energy) is applied to the ink in the pressure chamber 110, and ink droplets are discharged from the discharge ports 108.

  In this embodiment, a predetermined potential is applied to the individual electrode 135 in advance, and the individual electrode 135 is once set to the ground potential every time there is a discharge request, and then the potential is applied to the individual electrode 135 again at a predetermined timing. A drive signal to be applied is output from the driver IC 96. In this case, the piezoelectric sheets 141 to 143 return to the original state at the timing when the individual electrode 135 becomes the ground potential, and the volume of the pressure chamber 110 increases as compared with the initial state (a state in which a voltage is applied in advance). Ink is sucked into the pressure chamber 110 from the manifold channel 105a. After that, at the timing when a predetermined potential is applied to the individual electrode 135 again, the piezoelectric sheets 141 to 143 are deformed so that the portions facing the active region protrude toward the pressure chamber 110, and the ink is reduced due to the volume reduction of the pressure chamber 110. The pressure increases, and ink is ejected from the ejection port 108.

  Next, the fixing mechanism 3 will be described below with reference to FIGS. 2, 3, and 7. As shown in FIG. 2, the rotation member 31 of the fixing mechanism 3 is an arm member extending in the longitudinal direction, and is rotatably supported by a support shaft 25 that connects between the side plates 21. The rotating member 31 rotates about the support shaft 25 to fix the recording head 1 to the support frame 2 (see FIGS. 2B, 8B, and 8C). And a release position (position shown in FIG. 8A) for releasing the fixing of the recording head 1.

  The rotation member 31 is provided with two pressing portions 33 and 34. When the rotating member 31 is in the fixed position, the two pressing portions 33 and 34 are in contact with the upper surface (head cover 99) of the recording head 1. At this time, the pressing portion 33 presses the position near the left end portion of the recording head 1 and overlaps the ejection surface 9a in the vertical direction, and the pressing portion 34 is near the right end portion of the recording head 1 and perpendicular to the ejection surface 9a. Press the position that overlaps. That is, the pressing portions 33 and 34 press the area inside the support point supported by the two support portions 23a of the recording head 1, and fix the recording head 1 between the two support portions 23a.

  Each of the pressing portions 33 and 34 is a cylindrical member fixed to the rotating member 31, a protruding member that is disposed in the cylindrical member and protrudes from an opening below the cylindrical member, and is disposed and protrudes in the cylindrical member. And a spring for biasing the member downward. With this configuration, when the rotating member 31 is disposed at the fixed position, the protruding members of the pressing members 33 and 34 abut against the head cover 99 and press the head cover 99 by the elastic force of the spring.

  At the other end of the rotating member 31, a hook 35 for locking the rotating member 31 at a fixed position is provided. The hook 35 is rotatable about a shaft 35 a that is attached to the rotating member 31 and is parallel to the width direction. The hook 35 is disposed below the rotating member 31 and an operating portion 35 b positioned above the rotating member 31. And a locking portion 35c bent in a substantially U shape. When the rotating member 31 is disposed at the fixed position, when the hook 35 is rotated by operating the operating portion 35 b, the locking portion 35 c is locked to the pin 29 protruding from the side plate 21.

  The fixing mechanism 3 includes a changing mechanism 40 that can change the separation distance between the discharge surface 9 a and the rotating member 31. The changing mechanism 40 is disposed at a substantially central portion between the pressing points of the pressing portions 33 and 34 with respect to the longitudinal direction. The change mechanism 40 includes a first fixing portion 41 on the recording head 1 side, a second fixing portion 42 on the support frame 2 side, and two screws 43 that connect the both fixing portions 41 and 42. The screw 43 itself rotates to change the distance between the fixing portions 41 and 42. In the present embodiment, the first fixing portion 41 is changed so as to approach the second fixing portion 42.

  The first fixing member 41 has a plate-like member 45 fixed to the center of the upper surface of the head cover 99 and a protrusion 46 protruding from the center of the lower surface of the plate-like member 45. As shown in FIG. 7, two screw holes 45a are formed in the plate-like member 45 along the longitudinal direction. Screws 43 are respectively screwed into the two screw holes 45a. The protrusion 46 is disposed at the center between the two screw holes 45a. Further, as shown in FIG. 3, the projecting portion 46 passes through the upper portions of the head cover 99, the control base 95, the upper housing 6, the filter unit 7 and the lower housing 5, and the tip (lower end) is made of metal. The flow path forming member 10 (reservoir unit 8) is fixed to the center of the upper surface (the surface opposite to the discharge surface 9a).

  For this reason, when the plate-like member 45 is pulled up as will be described later, the pulling force acting on the protruding portion 46 effectively acts on the flow path forming member 10, and the parallelism of the discharge surface 9a can be easily adjusted. Become. That is, the upper center (fixed region 10a) of the flow path forming member 10 is pulled up, and the deflection of the discharge surface 9a is likely to approach horizontal. Further, even if the recording head 1 has the flow path forming member 10 made of metal as in the present embodiment, the plate-shaped member 45 is formed by fixing the protruding portion 46 to the flow path forming member 10. When pulled up, the protrusion 46 effectively pulls up the flow path forming member 10, and the parallelism of the discharge surface 9 a can be adjusted.

  The second fixing member 42 includes a girder member 47 that is fixed to the center upper end of the two side plates 21, a plate-like member 48 to which two screws 43 are attached, and a hole formed in the rotating member 31. A screw 49 is provided to connect the girder member 47 and the plate-like member 48 through 31a. The plate-like member 48 is configured to support the screw 43 in a rotatable manner and to be unable to move in the vertical direction with respect to the screw 43 even when the screw 43 rotates. That is, the two screws 43 are arranged so as not to move in the vertical direction by the plate-like member 48.

  With this configuration, when the screw 43 is rotated, the plate-like member 45 into which the screw 43 is screwed moves in the vertical direction according to the rotation direction of the screw 43. In accordance with the movement of the plate-like member 45, the protruding portion 46 also moves in the vertical direction, and is disposed at a fixed position with the discharge surface 9a corresponding to the fixed regions 10a and 99a to which the plate-like member 45 and the protruding portion 46 are fixed. It is possible to adjust the vertical separation distance from the rotating member 31.

  Next, a procedure for assembling the recording head 1 to the support frame 2 will be described with reference to FIG. First, as shown in FIG. 8A, the recording head 1 is placed so that the outer portions of both ends of the ejection surface 9a in the longitudinal direction of the recording head 1 are supported by the support portion 23a from the direction facing the ejection surface 9a. Set on the support frame 2. At this time, a first fixing member 41, a plate-like member 48 of the second fixing member 42 and two screws 43 are attached to the recording head 1. At this time, the beam member 47 and the screw 49 of the second fixing member 42 of the fixing mechanism 3 are not attached to the support frame 2.

  Next, as shown in FIG. 8A, the rotating member 31 of the fixing mechanism 3 positioned at the release position is rotated clockwise in the drawing to obtain the fixed position shown in FIG. 8B. And the operation part 35b of the hook 35 is operated, the latching | locking part 35c is latched by the pin 29, and the rotation member 31 is fixed to a fixed position. Thus, the recording head 1 is sandwiched between the two pressing portions 33 and 34 and the two support portions 23 a, and the recording head 1 is fixed to the support frame 2. At this time, a pressing force is applied to a region inside the support point supported by the two support portions 23 a of the recording head 1 by the two press portions 33 and 34 of the fixing mechanism 3. As described above, when a pressing force is applied to the inner side of the support point of the recording head 1, as shown in FIG. 8B, the center of the ejection surface 9a may be bent so as to be convex.

  Next, as shown in FIG. 8C, the girder member 47 of the second fixing member 42 is passed over the center upper ends of the two side plates 21 and fixed to the side plates 21. The plate-like member 48 and the girder member 47 are connected by screws 49 so that the plate-like member 48 does not move relative to the girder member 47 in the vertical direction. When the discharge surface 9a is bent as described above, the two screws 43 are rotated so that the plate-like member 45 and the protruding portion 46 are pulled upward. Then, the discharge surface 9a bent so as to protrude downward returns to the horizontal. In this way, the parallelism of the discharge surface 9a can be adjusted. After adjusting the parallelism of the discharge surface 9a, the screw 43 and at least one of the plate-like members 45 and 48 are fixed with an adhesive so that the screw 43 is not loosened by vibration or the like. Thus, the assembly of the recording head 1 to the support frame 2 is completed.

  As described above, according to the inkjet printer of the present embodiment, the changing mechanism 40 is provided, so that the rotating member 31 is arranged at a fixed position, and the two support portions 23a and the two pressing portions 33 and 34 are used. Even if the ejection surface 9a is convexly bent by fixing the recording head 1 between them, the separation distance between the ejection surface 9a corresponding to the fixing regions 10a and 99a of the recording head 1 and the rotating member 31 can be changed. Thus, the parallelism of the discharge surface 9a can be adjusted.

  Further, as shown in FIG. 2B, the fixing regions 10a and 99a of the first fixing member 41 with respect to the recording head 1 are positioned so as to overlap with the center in the longitudinal direction of the ejection surface 9a. As a result, the discharge surface 9a can be effectively lifted, and the parallelism of the discharge surface 9a can be easily adjusted. The changing mechanism 40 includes a first fixing member 41, a second fixing member 42, and two screws 43, and the configuration is simplified.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the change mechanism may be fixed to an area in the recording head 1 that overlaps the area other than the center of the ejection surface 9a and is inside the pressing point pressed by the pressing portions 33 and 34. If the separation distance of the member 31 and the discharge surface 9a bent convexly downward can be changed, it will not be restricted to the above-mentioned structure. Further, the first fixing member 41 may be composed of only the plate-like member 45. In this case, the parallelism of the discharge surface 9a may be adjusted so that the discharge surface 9a is horizontal by rotating the screw 43 and pulling the plate-like member 45 upward.

  Further, the changing mechanism may be only the girder member 47 and the screw 49. In this case, the screw 49 may be extended and screwed into the recording head 1 (or the flow path forming member 10), and the recording head 1 (or the flow path forming member 10) may be pulled up to adjust the parallelism of the ejection surface 9a. The support frame 2 and the housing 301a may be integrated. In this case, the girder member 47 may be fixed to the housing 301a.

  Further, the support frame (support member) may have three or more support portions, and the pressing portions 33 and 34 may be provided on the rotating member 31 by three or more. The present invention can also be applied to a recording apparatus that employs a recording head other than an inkjet head.

1 Inkjet head (recording head)
2 Support frame (support member)
3 Fixing mechanism 9a Discharge surface 10 Flow path forming member (metal unit)
23a Supporting part 31 Rotating member 33, 34 Pressing part 40 Changing mechanism 41 First fixing member 42 Second fixing member 43 Screw 45 Plate member 45a Screw hole 46 Projection part 108 Discharge port 301 Inkjet printer (recording apparatus)

Claims (5)

A recording head having a discharge surface elongated in one direction in which a plurality of discharge ports for discharging liquid are arranged along one direction;
A support member having a plurality of support portions for supporting the recording head from a direction facing the discharge surface at a portion outside both ends of the discharge surface with respect to the one direction;
A recording apparatus comprising: a fixing mechanism for fixing the recording head to the support member;
The fixing mechanism is
A rotating member that is rotatable with respect to an axis parallel to the ejection surface orthogonal to the one direction so that a fixing position for fixing the recording head and a releasing position for releasing the fixing of the recording head can be taken;
Provided in the rotating member, and when the rotating member is in the fixed position, presses a region inside a support point supported by the plurality of support portions of the recording head, and A plurality of pressing portions for fixing the recording head between the support portions; and
The separation distance between the discharge surface corresponding to the fixed area and the rotating member disposed at the fixed position, which is fixed to an area inside the pressing point pressed by the plurality of pressing portions of the recording head. And a change mechanism capable of changing the recording device.   The recording apparatus according to claim 1, wherein the fixed region is at a position overlapping a center of the ejection surface in the one direction.   The change mechanism connects the first fixing member fixed to the recording head, the second fixing member fixed to the support member, and the first and second fixing members, and rotates itself while rotating. The recording apparatus according to claim 1, further comprising a screw that changes a separation distance of the fixing member. A plurality of the screws are provided along the one direction,
The first fixing member includes a plate-like member having a plurality of screw holes into which the screws are screwed, and a protrusion that protrudes from between the screw holes of the plate-like member and is fixed to the recording head. The recording apparatus according to claim 3, wherein the recording apparatus is a recording apparatus. The recording head includes a metal unit in which a flow path communicating with the discharge port is formed by laminating a plurality of metal plates having the discharge surface,
The recording apparatus according to claim 4, wherein the protrusion is fixed to a surface opposite to the discharge surface of the metal unit.

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