EP2845742B1 - Appareil de formation d'image - Google Patents

Appareil de formation d'image Download PDF

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Publication number
EP2845742B1
EP2845742B1 EP14183239.4A EP14183239A EP2845742B1 EP 2845742 B1 EP2845742 B1 EP 2845742B1 EP 14183239 A EP14183239 A EP 14183239A EP 2845742 B1 EP2845742 B1 EP 2845742B1
Authority
EP
European Patent Office
Prior art keywords
head holders
scanning direction
head
carriage
adjoining ones
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14183239.4A
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German (de)
English (en)
Other versions
EP2845742A1 (fr
Inventor
Soichi Saiga
Shinichiro Naruse
Takayuki Niihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP2845742A1 publication Critical patent/EP2845742A1/fr
Application granted granted Critical
Publication of EP2845742B1 publication Critical patent/EP2845742B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/34—Bodily-changeable print heads or carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Definitions

  • Embodiments of this disclosure relate to an image forming apparatus incorporating recording heads.
  • Image forming apparatuses are used as printers, facsimile machines, copiers, plotters, or multi-functional devices having two or more of the foregoing capabilities.
  • an inkjet recording apparatus uses, as a recording head, a liquid ejection head (or droplet ejection head) to eject droplets of ink.
  • image quality is affected by the landing accuracy of droplets ejected from nozzles of the recording head. Poor droplet landing accuracy causes a reduction in image quality. Therefore, in a case where a plurality of recording heads is used, a relative position among the recording heads is determined with high accuracy.
  • the relative position among the recording heads is adjusted by adjusting mounting positions of the recording heads in a carriage holding the recording heads.
  • an image forming apparatus includes a mechanism for adjusting the relative position among recording heads. In such a case, the relative position among the recording heads is adjusted, as needed, in the actual image forming apparatus after the recording heads are mounted.
  • JP 2007-190867-A discloses an arrangement in which a carriage includes a plurality of sub-carriages that are disposed on a surface of the carriage and surrounded by the carriage, and an adjustment assembly that adjusts a relative position among the sub-carriages is disposed on the surface of the carriage on which the sub-carriages are arranged.
  • JP2014-50969-A which was proposed by the inventors of the present invention earlier, discloses an arrangement in which a carriage includes a reference member from which sub-carriages are hung, and a relative position among the sub-carriages is adjusted by adjusting a difference in the degree of inclination among the sub-carriages through displacement of sub reference positions supporting the sub-carriages.
  • the former arrangement i.e., the arrangement disclosed in JP 2007-190867-A has the following problem. Specifically, it is necessary to increase the size of the carriage in order to allow the sub-carriages and the adjustment assembly to be disposed in the carriage. This increases the width of the carriage and the width of the apparatus. As a result, an installation area of the apparatus undesirably increases accordingly.
  • the latter arrangement i.e., the arrangement disclosed in JP 2014-50969-A has the following problem. Specifically, the adjustment of the degree of inclination of the sub-carriages changes a distance (gap) between each recording head and a printing surface. This also changes a landing timing on the printing surface. It therefore becomes difficult to control a landing position. Moreover, in a case where the gap is too small, the recording heads may contact a sheet during a printing operation and be damaged.
  • US 2013/0070022 A1 discloses an image forming apparatus in accordance with the preamble of claim 1.
  • EP 0 824 074 A2 discloses a recording head adjustment mechanism for adjusting a recording head in a scanning direction and a sub scanning direction using angle adjusting levers.
  • an object of the present invention is to provide an image forming apparatus capable of adjusting a shift of ink landing position without changing a printing gap in the actual image forming apparatus.
  • the present invention provides an image forming apparatus as defined in the claims.
  • shift of ink landing position among a plurality of recording heads can be adjusted without increasing the width of a carriage and changing a printing gap in an actual image forming apparatus.
  • the term "sheet” used herein is not limited to a sheet of paper but be, e.g., an OHP (overhead projector) sheet, a cloth sheet, a grass sheet, a substrate, or anything on which droplets of ink or other liquid can be adhered.
  • the term "sheet” is used as a generic term including a recording medium, a recorded medium, a recording sheet, or a recording sheet of paper.
  • image formation are used as a synonym for "image recording” and “image printing”.
  • image forming apparatus refers to an apparatus that ejects ink or any other liquid onto a medium to form images on the medium.
  • the medium is made of, for example, paper, string, fiber, cloth, leather, metal, plastic, glass, timber, and ceramic.
  • image formation which is used herein as a synonym for "recording” or “printing”, includes providing not only meaningful images, such as characters and figures, but meaningless images, such as patterns, to the medium (in other words, the term “image formation” includes only causing liquid droplets to land on the medium).
  • ink is not limited to "ink” in a narrow sense unless specifically distinguished and includes any types of liquid useable for image formation, such as recording liquid, fixing solution, DNA sample, resist, pattern material, and resin.
  • image used herein is not limited to a two-dimensional image and includes, for example, an image applied to a three dimensional object and a three dimensional object itself formed as a three-dimensionally molded image.
  • image forming apparatus includes both serial-type image forming apparatus and line-type image forming apparatus.
  • Fig. 1 is a perspective view of an entire configuration of an image forming apparatus 1000 according to this embodiment.
  • Fig. 2 is a perspective view of a carriage scanning assembly in this embodiment.
  • the image forming apparatus 1000 is a serial-type inkjet recording apparatus, and includes an apparatus body 1 and a support 2 that supports the apparatus body 1.
  • a guide rod 3 and a guide stay 4 are provided so as to extend from one side plate to the other side plate.
  • the guide rod 3 and the guide stay 4 hold a carriage 5 so that the carriage 5 is slidable in a direction (main scanning direction) indicated by arrow A.
  • the carriage 5 is provided with recording heads 6, which include liquid ejection heads that eject ink droplets of black (K), yellow (Y), magenta (M) and cyan (C), respectively.
  • recording heads 6 include liquid ejection heads that eject ink droplets of black (K), yellow (Y), magenta (M) and cyan (C), respectively.
  • a head tank that supplies ink to each recording head is provided to form a single unit with the recording head.
  • a main scanning unit 10 that moves the carriage 5 for scanning includes a driving motor 11 disposed on one side of the main scanning direction A, a driving pulley 12 driven for rotation by the driving motor 11, a driven pulley 13 disposed on the other side of the main scanning direction A, and a timing belt 14 which is a dragging member wound between the driving pulley 12 and the driven pulley 13.
  • tension is given in an outward direction (a direction away from the driving pulley 12) by a tension spring.
  • a sheet 20 is intermittently conveyed by a sucking conveyance unit 7 in a direction (sub scanning direction or sheet conveyance direction indicated by arrow B) orthogonal to the main scanning direction A of the carriage 5.
  • a maintenance and recovery unit 8 that does maintenance and recovery of the recording heads 6 is provided.
  • main cartridges 9 that contain respective color inks to be supplied to the sub-tanks of the recording heads 6 are detachably mounted to the apparatus body 1.
  • a sheet roll (hereinafter referred to as a "sheet") 20 is placed on a sheet feeder 21.
  • the sheet 20 fed from the sheet feeder 21 is conveyed to the recording region by the conveyance unit from the back side to the front side of the apparatus body 1.
  • droplets are ejected by driving the recording heads 6 in accordance with image data while moving the carriage 5 in the main scanning direction A. In this way, a required image is formed on the sheet 20.
  • the sheet 20 is intermittently conveyed by the sucking conveyance unit 7. By thus repeating the conveyance and formation of an image, image formation is completed.
  • the sheet 20 on which the image has been formed is cut to a predetermined length and is then discharged into a discharge tray disposed on the front side of the apparatus body 1.
  • Fig. 3 is a schematic perspective view of a carriage section illustrating a state in which head holders have not been mounted to the carriage of the image forming apparatus.
  • Fig. 4 is a perspective view of the carriage section illustrating a state in which the head holders have been mounted to the carriage.
  • a head holder 51A for black and a head holder 51B for the other colors are held.
  • the head holder 51A two recording heads 6A and 6B that eject black droplets are provided in staggered manner in the sub scanning direction B in FIG. 1 .
  • the head holder 51B three recording heads 6C, 6D, and 6E that eject yellow, magenta and cyan droplets, respectively, are provided so that their positions in the sub scanning direction are same as that of the recording head 6B.
  • these recording heads are referred to as the "recording heads 6", as previously described, in a case where they are not distinguished from each other.
  • the number of the recording heads 6 held in each of the head holders 51A and 51B may be one.
  • a reference shaft 71 that serves as a reference member is provided in the same direction as the direction in which the guide rod 3 is provided.
  • Each of the head holders 51A and 51B (hereinafter collectively referred to as “head holders 51" unless not distinguished) has a hook portion 53 having a hook shape that is to be engaged with the reference shaft 71 so as to be detachably attachable to the reference shaft 71.
  • the head holders 51A and 51B are held in parallel with each other in the carriage 5 with the hook portions 53 hooked on the reference shaft 71.
  • the shape of the reference shaft 71 is not limited to a cylindrical column shape, and can be, e.g., a polygonal column shape.
  • the reference shaft 71 By thus disposing the reference shaft 71 in the same direction as the direction in which the guide rod 3 for the carriage 5 is disposed, positioning accuracy of inclination in the sub scanning direction, height direction, tilt direction and main scanning direction is improved.
  • the head holder 51 when heads are replaced with new ones, for example, when the recording heads 6A and 6B are replaced with new ones, the head holder 51 is detached from the reference shaft 71, and then the head holder 51 in which the new heads are mounted is hooked and held on the reference shaft 71.
  • the image forming apparatus includes recording heads each having a plurality of nozzles from which droplets are ejected, one or more head holders each of which holds one or more of the recording heads, and a carriage which holds the head holders.
  • the carriage is movable along a guide member disposed in the main scanning direction.
  • the carriage has the reference shaft 71 serving as a reference member disposed in the same direction as the direction in which the guide member is disposed.
  • the head holders are hooked and held on the reference member so as to be detachably attachable to the reference member. This arrangement makes it possible to easily determine positions of the recording heads with high accuracy and to easily replace the recording heads.
  • Fig. 5 is a side view of the carriage section illustrating the pressing structure.
  • Fig. 6 is a schematic perspective view of a state in which a holder pressing cover member serving as a pressing member is attached.
  • each of the head holders 51Aand 51B has at least one abutting portion 58, which is a contact portion that makes contact with the carriage 5.
  • Fig. 5 shows a state in which each of the head holders 51A and 51B has a single hook portion 53 in the main scanning direction
  • each of the head holders 51A and 51B may have the hook portion 53 at its opposed ends in the main scanning direction.
  • the holder pressing assembly 80 is a pressing unit that presses the head holders 51 toward the carriage 5 by being rotated about the reference shaft 71.
  • the holder pressing assembly 80 has a cover member 82 for holder pressing whose rear end 82b is supported by the carriage 5 so as to be rotatable about a shaft 81.
  • the cover member 82 is, for example, a member having a shape of a substantially flat plate as shown in Fig. 6 .
  • FIG. 6 shows a case where a single cover member 82 is shared by the two head holders 51A and 51B, a cover member may be provided for each of the head holders 51Aand 51B.
  • the cover member 82 has a cover part 180 to cover an area above and oppose the head holders 51A and 51B.
  • the cover member 82 also has, on its front end side, a pressing part 181 with pressing portions 182 (a collective term for pressing portions 182a, 182b, and 182c) to contact upper portions of the head holders 51.
  • an elastic member 83 such as a helical extension spring is provided between the cover member 82 and the carriage 5.
  • the cover member 82 thus causes the head holders 51 to be rotated about the reference shaft 71 and urged in a clockwise direction in Fig. 5 (the direction indicated by arrow D1) and to be pressed against the reference shaft 71 and the carriage 5.
  • Fig. 7 is a schematic plan view of a configuration of a carriage according to this embodiment.
  • Fig. 8 is a schematic side view of the configuration of the carriage according to this embodiment.
  • Fig. 9 is a schematic plan view of ink landing positions in this embodiment.
  • Fig. 10 is a schematic plan view illustrating position adjustment of head holders in this embodiment.
  • Fig. 11 is a schematic plan view illustrating ink landing positions after the position adjustment of the head holders in this embodiment.
  • Head holders 51A and 51B are held in a carriage 5 by a reference shaft 71 and pushed toward one side of the carriage 5 by a pressing unit 85 (indicated by arrow representing a pressing direction) disposed in the carriage 5.
  • the head holders 51A and 52B are pushed toward the right side by the pressing unit 85 such as a pressing spring.
  • the pressing unit 85 causes a contact face 54A of the head holder 51A and a contact face 54B of the head holder 51B to contact each other in the vicinity of the reference shaft 71, thereby determining the distance in the main scanning direction between the head holders 51A and 51B.
  • the contact faces 54A and 54B are on an identical line.
  • an adjustment member 30 is disposed in the vicinity of front ends of the head holders 51A and 51B in the sub scanning direction B, i.e., on the downstream end side of the sheet conveyance direction.
  • the adjustment member 30 With the adjustment member 30, the head holders 51A and 51B are connected to each other. Accordingly, since the head holders 51A and 51B contact each other via their contact faces 54A and 54B on the upstream end side of the sub scanning direction B and the adjustment member 30 is provided on the downstream end side of the sub scanning direction B, the gap in the main scanning direction B between the head holders 51A and 51B at the connecting portion can be adjusted by the adjustment member 30.
  • the adjoining head holders 51A and 51B are separate members, there is a possibility that a posture in which the head holder 51A is hung on the reference member 71 differs from that of the head holder 51B due to parts variation. Such a difference in posture shifts a landing position of ink ejected from the head holder 51A and a landing position of ink ejected from the head holder 51B from each other. This makes it impossible to form a desired image.
  • the distance between the head holders 51 is adjusted by the adjustment member 30 so that the shift of ink landing position between the head holders 51 can be finely adjusted in the actual image forming apparatus.
  • ink ejected from the head holders 51A and 51B lands in a shape of two lines that have a wider distance at their bottom side than their top side as shown in Fig. 9 .
  • the landing position of ink ejected from the recording heads 6 of the head holder 51B is shifted more in the upstream side of the main scanning direction indicated by arrow A as the recording heads are lowered and located closer to a sheet.
  • ink ejected from the head holder 51B lands in a shape of a tilted line whose downstream side of the sub scanning direction B is tilted toward the upstream side of the main scanning direction A although ink ejected from the head holder 51A lands in a shape of a line parallel with the sub scanning direction B.
  • This forms a shape of two lines that have a wider distance at their bottom side than their top side.
  • the head holder 51B is rotated in a yawing direction R1 by narrowing the distance in the main scanning direction A between the front ends of the head holders 51 by use of the adjustment member 30, as shown in Fig. 10 . That is, the head holder 51B is moved for adjustment in a direction in which the gap between the head holders 51A and 51B becomes narrower while maintaining a gap from the sheet.
  • ink ejected from the head holder 51B also lands in a shape of a line parallel with the sub scanning direction B as shown in Fig. 11 . That is, both of ink ejected from the head holder 51A and ink ejected from the head holder 51b land in line parallel with the sub scanning direction B. It is therefore possible to adjust the shift of ink landing position between the head holders 51A and 51B through adjustment in one direction in the actual image forming apparatus, without increasing the carriage width and without changing a printing gap.
  • Fig. 12 is a schematic side view illustrating a configuration of the carriage according to this embodiment.
  • Fig. 13 is a schematic plan view illustrating ink landing positions in this embodiment.
  • Fig. 14 is a schematic plan view illustrating position adjustment of head holders in this embodiment.
  • Fig. 15 is a schematic plan view illustrating the ink landing positions after the position adjustment of the head holders in this embodiment.
  • ink ejected from the head holders 51A and 51B lands in a shape of two lines that have a wider distance at their top side than their bottom side as shown in Fig. 13 .
  • ink ejected from the head holder 51B lands in a shape of a tilted line whose downstream side is tilted toward the downstream side of the main scanning direction A, although ink ejected from the head holder 51A lands in a shape of a line parallel with the sub scanning direction B.
  • the head holder 51B is rotated in a yawing direction R2 by widening the distance in the main scanning direction A between the front ends of the head holders 51 by use of the adjustment member 30, as shown in Fig. 14 .
  • ink ejected from the head holder 51B also lands in a line parallel with the sub scanning direction B as shown in Fig. 15 . That is, both of ink ejected from the head holder 51A and ink ejected from the head holder 51b land in parallel with the sub scanning direction B. It is therefore possible to adjust shift of ink landing position between the head holders 51A and 51B.
  • the landing positions shown in Figs. 9 and 13 are exaggerated. The angle of the tilted line is actually very small because the shift of landing position occurs due to a cause such as parts variation.
  • Fig. 16 is a schematic plan view illustrating a configuration of a carriage according to this embodiment.
  • Fig. 17 is a schematic plan view illustrating ink landing positions in this embodiment.
  • Fig. 18 is a schematic plan view illustrating position adjustment of head holders in this embodiment.
  • Fig. 19 is a schematic plan view illustrating the ink landing positions after the position adjustment of the head holders in this embodiment.
  • a reference member 71 The center of a reference member 71 is slightly deformed toward the front side due to the weight of head holders 51 and pressure applied by a cover member 82, as shown in Fig. 16 .
  • ink ejected from the head holders 51A and 51B lands in two lines that have a wider distance at their bottom side than their top side as shown in Fig. 17 . That is, the ink ejected from the head holder 51A lands in a tilted line whose downstream side of the sub scanning direction B is tilted leftward, and the ink ejected from the head holder 51B lands in a tilted line whose downstream side of the sub scanning direction B is tilted rightward. This, as a whole, forms two lines that have a wider distance at their bottom side than their top side.
  • both of the head holders 51 are rotated in yawing directions R3 and R4 by narrowing the distance in the main scanning direction A between the front ends of the head holders 51 by use of an adjustment member 30, as shown in Fig. 18 .
  • an adjustment member 30 as shown in Fig. 18 .
  • Fig. 20 is a schematic side view illustrating a configuration of a carriage according to this embodiment.
  • Fig. 21 is a schematic front view illustrating how two head holders are disposed in this embodiment.
  • Fig. 22 is a schematic front view illustrating an adjustment member 30 in this embodiment.
  • Fig. 23 is a schematic plan view illustrating the adjustment member 30 in this embodiment.
  • Fig. 24 is a schematic perspective view of a cam member 31 in the adjustment member 30.
  • Fig. 25 is a schematic perspective view of a leaf spring 32 in the adjustment member 30.
  • Fig. 26 is a schematic front view illustrating the adjustment member 30 in this the present embodiment.
  • Fig. 27 is a schematic front view illustrating the adjustment member 30 in this embodiment.
  • Fig. 20 shows an attachment position of the adjustment member 30 according to the present embodiment.
  • the adjustment member 30 is disposed in the vicinity of a front end of a head holder 51B in the sub scanning direction B.
  • the position of the adjustment member 30 in the height direction is the same as that of each contact face 54 between the head holders 51Aand 51B.
  • the head holders 51A and 51B are in contact with each other at two points, i.e., the contact surface 54 and the adjustment member 30.
  • the adjustment member 30 is disposed at a lower portion of the head holders 51, a change in the distance between the head holders 51A and 51B by the adjustment member 30 causes one of the head holders to rotate about the contact surface 54 in a pitching direction of a reference member 71, as shown in Fig. 21 .
  • the adjustment member 30 is located at the same position as the contact surface 54 in the height direction, thus allowing adjustment without rotating the head holders 51 in the pitching direction of the reference shaft 71.
  • the adjustment member 30 may be, for example, configured to include, as adjusters, the cam member 31 and the leaf spring 32 as shown in Figs. 22 to 25 .
  • the leaf spring 32 draws the head holders 51A and 51B toward each other.
  • the cam member 31, which is disposed between the head holders 51A and 51B, can change a gap between the head holders 51A and 51B depending on its position where the head holders 51A and 51B are made in contact with each other.
  • the adjustment member 30 has a bracket 30a disposed between the head holders 51A and 51B as shown in Figs. 22 and 23 .
  • the head holders 51A and 51B are movable in a direction, in which they contact each other or are separated from each other.
  • a shaft 30c penetrates through the bracket 30a.
  • the cam member 31 is provided at a lower end of the shaft 30c, and a knob 30b is provided on the opposite side.
  • the distance between the holders can be adjusted by rotating the cam member 31 by manipulation of the knob. This makes it possible to provide a space-saving adjustment member 30 between the head holders that does not affect the carriage width and to linearly change the distance between the head holders with accuracy of the cam member.
  • the drawer may be a tension spring or the like.
  • tension springs 33 and a screw 34 are disposed between the head holders 51 and the distance between the head holders 51 is changed depending on how much the screw 34 sticks out, as shown in Fig. 26 .
  • This arrangement makes it possible to provide a space-saving adjustment member 30 between the head holders 51 that does not affect the carriage width and to linearly adjust the distance between the head holders with accuracy of feeding of the screw 34.
  • a compression spring 35 and a screw 36 are disposed between the head holders 51 and the distance between the head holders 51 is changed by drawing the head holders 51 toward each other with the screw, as shown in Fig. 27 .
  • the adjusters may be anything provided that they can change the distance between the head holders 51.

Landscapes

  • Ink Jet (AREA)

Claims (6)

  1. Appareil de formation d'image, comprenant :
    un élément de guidage (3) s'étendant dans une direction de balayage principal (A) ;
    une pluralité de têtes d'enregistrement (6) pour éjecter des gouttelettes ;
    une pluralité de supports de tête (51A, 51B), chacun desquels contient au moins une de la pluralité de têtes d'enregistrement (6), la pluralité de supports de tête (51A, 51B) étant maintenus côte à côte sur l'élément de guidage (3) ; et
    un chariot (5) contenant la pluralité de supports de tête (51A, 51B), le chariot (5) pouvant être déplacé le long de l'élément de guidage (3) et comportant un élément de référence (71) s'étendant dans la direction de balayage principal (A) sur lequel chacun de la pluralité de supports de tête (51A, 51B) est maintenu ;
    caractérisé par :
    un élément d'ajustement (30) disposé à proximité d'extrémités avant sur un côté aval de la pluralité de supports de tête (51A, 51B) dans une direction de transport de feuille, l'élément d'ajustement (30) reliant les supports de tête adjacents de la pluralité de supports de tête les uns aux autres et pouvant être utilisé dans l'appareil d'impression pour faire tourner au moins un de la pluralité de supports de tête dans une direction de lacet par l'ajustement de la distance entre les supports de tête adjacents de la pluralité de supports de tête (51A, 51B) dans la direction de balayage principal (A).
  2. Appareil de formation d'image selon la revendication 1, dans lequel l'élément d'ajustement (71) relie les éléments adjacents à proximité d'extrémités avant des éléments adjacents à une distance plus courte dans la direction de balayage principal (A) que dans d'autres parties des éléments adjacents dans la direction de balayage secondaire (B), et ajuste les éléments adjacents pour augmenter la distance à proximité des extrémités avant.
  3. Appareil de formation d'image selon la revendication 1, dans lequel l'élément d'ajustement (71) relie les éléments adjacents à proximité d'extrémités avant des éléments adjacents à une distance plus grande dans la direction de balayage principal (A) que dans d'autres parties des éléments adjacents dans la direction de balayage secondaire (B), et ajuste les éléments adjacents pour augmenter la distance à proximité des extrémités avant.
  4. Appareil de formation d'image selon l'une quelconque des revendications 1 à 3, comprenant en outre une unité de pressage (85), à proximité de l'élément de référence (71), de la pluralité de supports de tête (51A, 51B) dans la direction de balayage principal (A),
    les supports de tête adjacents de la pluralité de supports de tête (51A, 51B) étant en contact les uns avec les autres par l'intermédiaire des surfaces de contact (54A, 54B) de la pluralité de supports de tête (51A, 51B) qui sont sur la même ligne que l'unité de pressage (85), et
    l'élément d'ajustement (30) étant situé à la même hauteur que chacune des surfaces de contact (54A, 54B).
  5. Appareil de formation d'image selon l'une quelconque des revendications 1 à 4, dans lequel l'élément d'ajustement (30) comprend un élément élastique (32) reliant les supports de tête adjacents de la pluralité de supports de tête (51A, 51B) à proximité des extrémités avant, dans la direction de balayage secondaire (B), parmi la pluralité de supports de tête (51A, 51B) et un élément de came (31) pour changer la distance dans la direction de balayage principal entre les supports de tête adjacents de la pluralité de supports de tête.
  6. Appareil de formation d'image selon l'une quelconque des revendications 1 à 4, dans lequel l'élément d'ajustement (30) comprend un élément élastique (33) reliant les supports de tête adjacents de la pluralité de supports de tête (51A, 51B) à proximité des extrémités avant, dans la direction de balayage secondaire (B), parmi la pluralité de supports de tête (51A, 51B) et une vis (34) pour changer la distance dans la direction de balayage principal entre les supports de tête adjacents de la pluralité de supports de tête.
EP14183239.4A 2013-09-04 2014-09-02 Appareil de formation d'image Active EP2845742B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013183084A JP6217249B2 (ja) 2013-09-04 2013-09-04 画像形成装置

Publications (2)

Publication Number Publication Date
EP2845742A1 EP2845742A1 (fr) 2015-03-11
EP2845742B1 true EP2845742B1 (fr) 2019-02-27

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JP (1) JP6217249B2 (fr)

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US10434786B2 (en) 2015-12-28 2019-10-08 Seiko Epson Corporation Liquid supply unit
CN107650520B (zh) * 2016-07-25 2020-02-18 东京毅力科创株式会社 功能液排出装置和功能液排出位置调整方法
US10173447B2 (en) 2016-12-14 2019-01-08 Océ Holding B.V. Printer with movable carriage
JP7006374B2 (ja) * 2017-04-26 2022-01-24 株式会社リコー 液体吐出装置
CN114225987B (zh) * 2021-11-15 2023-03-07 北京理工大学 一种可分别控制的双液滴生成装置

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