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WO2016111365A1 - Unité de tête de déversement de gouttelette de liquide, procédé de réglage de position de tête de déversement de gouttelette de liquide, et appareil de formation d'image - Google Patents

Unité de tête de déversement de gouttelette de liquide, procédé de réglage de position de tête de déversement de gouttelette de liquide, et appareil de formation d'image Download PDF

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Publication number
WO2016111365A1
WO2016111365A1 PCT/JP2016/050556 JP2016050556W WO2016111365A1 WO 2016111365 A1 WO2016111365 A1 WO 2016111365A1 JP 2016050556 W JP2016050556 W JP 2016050556W WO 2016111365 A1 WO2016111365 A1 WO 2016111365A1
Authority
WO
WIPO (PCT)
Prior art keywords
droplet discharge
discharge head
contact portion
unit
housing
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.)
Ceased
Application number
PCT/JP2016/050556
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English (en)
Japanese (ja)
Inventor
桑田　正弘
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2016568764A priority Critical patent/JP6686908B2/ja
Publication of WO2016111365A1 publication Critical patent/WO2016111365A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/155—Arrangement thereof for line printing

Definitions

  • the present invention relates to a droplet discharge head unit, a method for adjusting the position of a droplet discharge head, and an image forming apparatus.
  • an ink jet recording apparatus that forms an image on a recording medium by discharging ink droplets from a plurality of nozzles provided in a droplet discharge head is known.
  • the amount of eccentricity can be adjusted in the range of half rotation (180 degrees) by rotating the eccentric top, but for example, when the adjustment range is ⁇ 100 ⁇ m, the adjustment resolution is About 1 ⁇ m / degree. In this case, when adjusting on the order of several ⁇ m, the eccentric top must be adjusted by an angle of several degrees, and it is difficult to obtain high resolution from the viewpoint of operability.
  • the present invention has been made in view of such problems, and a droplet ejection head unit that has high landing position accuracy of a droplet on a recording medium and that can be easily adjusted, and position adjustment of the droplet ejection head.
  • a method and an image forming apparatus are provided.
  • a droplet discharge head unit A droplet discharge head for discharging droplets;
  • a holding unit for detachably holding the droplet discharge head;
  • a housing rotatable by a rotating shaft member;
  • a rotation adjusting unit that contacts the housing and adjusts the rotation of the housing;
  • a position adjusting unit that is provided in the housing and adjusts a holding position of the droplet discharge head with respect to the holding unit in contact with the droplet discharge head;
  • ⁇ 1 passes through the center of the rotating shaft member and An angle from an axis parallel to the moving direction to the rotation adjusting portion and the contact portion of the housing is denoted by d 2 from the center of the rotating shaft member to a reference portion serving as a reference for position movement in the position adjusting portion.
  • ⁇ 2 represents an angle from an axis passing through the center of the rotating shaft member and parallel to the moving direction of the droplet discharge head to the reference portion
  • the distance from the center of the rotating shaft member to the contact portion between the position adjusting unit and the droplet discharge head is greater than the distance from the center of the rotating shaft member to the contact portion between the rotation adjusting unit and the housing. Is also short.
  • Either the tip of the position adjusting unit or the contact portion of the droplet discharge head with which the position adjusting unit abuts has a spherical shape.
  • the droplet discharge head is A first contact portion provided on one surface parallel to the droplet discharge direction of the droplet discharge head; A second contact portion provided on another surface parallel to the droplet discharge direction of the droplet discharge head different from the one surface,
  • the holding part is
  • the droplet discharge head includes a fixed portion that is fixed in a state in which the first contact portion is in contact with the droplet discharge head so as to be rotatable about an axis along the droplet discharge direction of the droplet discharge head;
  • the second contact part is in contact with the position adjustment part.
  • the invention according to claim 5 is the droplet discharge head unit according to any one of claims 1 to 3,
  • the droplet discharge head is A first contact portion provided on one surface parallel to the droplet discharge direction of the droplet discharge head; A second abutting portion provided on another surface parallel to the droplet discharge direction of the droplet discharge head different from the one surface;
  • the housing, the rotation adjustment part, and the position adjustment part are provided separately, The first contact portion and the second contact portion are in contact with the corresponding position adjustment portions.
  • the invention described in claim 6 is the droplet discharge head unit according to any one of claims 1 to 3,
  • the droplet discharge head is A first contact portion provided on a first surface parallel to a droplet discharge direction of the droplet discharge head;
  • a second contact portion provided on a second surface parallel to a droplet discharge direction of the droplet discharge head different from the first surface;
  • a third contact portion provided on a third surface parallel to the droplet discharge direction of the droplet discharge head;
  • the invention according to claim 7 is the droplet discharge head unit according to any one of claims 1 to 6, wherein a plurality of the droplet discharge heads are arranged one-dimensionally or two-dimensionally. is there.
  • the invention described in claim 8 is a method of adjusting the position of a droplet discharge head in the droplet discharge head unit according to any one of claims 1 to 7,
  • the position adjustment unit is moved by the rotation of the housing, and the holding position of the droplet discharge head with respect to the holding unit is adjusted.
  • an image forming apparatus comprising the droplet discharge head unit according to the seventh aspect.
  • the landing position accuracy of the liquid droplet on the recording medium is high, and the position accuracy can be easily adjusted.
  • FIG. 1 is a perspective view illustrating a schematic configuration of an image forming apparatus. It is a perspective view of a droplet discharge head unit. It is a bottom view of a droplet discharge head unit. It is a top view which shows a droplet discharge head and a position adjustment mechanism. It is a right view which shows a droplet discharge head and a position adjustment mechanism. It is a schematic diagram for demonstrating the positional relationship of a position adjustment part and an adjustment screw. It is a schematic diagram which shows the example whose position adjustment part is needle shape. It is a schematic diagram which shows the example whose position adjustment part is a rectangular parallelepiped shape. It is a schematic diagram for demonstrating the position adjustment mechanism in an adjustment part.
  • the conveyance direction of the recording medium K is described as the front-rear direction
  • the direction orthogonal to the conveyance direction on the conveyance surface of the recording medium K is defined as the left-right direction
  • the image forming apparatus 100 includes a platen 101, a conveyance roller 102, line heads 200, 201, 202, 203, and the like (FIG. 1).
  • the platen 101 supports the recording medium K on the upper surface, and transports the recording medium K in the transport direction (front-rear direction) when the transport roller 102 is driven.
  • the line heads 200, 201, 202, and 203 are provided in parallel in the width direction (left-right direction) orthogonal to the transport direction from the upstream side to the downstream side in the transport direction (front-rear direction) of the recording medium K.
  • at least one droplet discharge head unit 1 described later is provided in the line heads 200, 201, 202, and 203.
  • cyan (C), magenta (M), yellow (Y), Black (K) ink is ejected toward the recording medium K.
  • the droplet discharge head unit 1 includes a droplet discharge head 2, a holding unit 3 that detachably holds the droplet discharge head 2, and a position reference pin for fixing the droplet discharge head 2 to the holding unit 3 so as to be rotatable. 4 and an adjustment unit 5 for adjusting the position of the droplet discharge head 2 (see FIGS. 2 to 5).
  • the droplet discharge head unit 1 is configured to hold the droplet discharge head 2 detachably by the holding unit 3 so that the bottom surface is exposed from the opening of the holding unit 3.
  • the holding unit 3 holds a plurality of droplet discharge heads 2 so as to form a staggered pattern as a whole. Specifically, for example, three droplets in the left-right direction and two droplets in the front-rear direction are used.
  • the discharge head 2 is held.
  • the droplet discharge head 2 includes a droplet discharge portion 21 in which a plurality of nozzles N that discharge droplets are arranged on the bottom surface, an ink chamber 22 that supplies ink to each of the plurality of nozzles N, and ink in the ink chamber 22.
  • the ink supply unit 221 supplies the ink, the ink discharge unit 222 that discharges the ink in the ink chamber 22, and the like.
  • the droplet discharge section 21 has a pressure chamber (not shown) corresponding to each nozzle N inside, and is supplied with ink from the ink chamber 22 to the pressure chamber. When the element (not shown) is displaced and the ink in the pressure chamber is pressurized, the ink droplets are ejected from the nozzle N.
  • the droplet discharge head 2 is opposed to a position fixing portion 23 as a fixing portion provided on one side surface parallel to the droplet discharge direction (vertical direction), and a side surface on which the position fixing portion 23 is provided.
  • the positioning part 25 provided in the side surface is provided (refer FIG. 4 etc.).
  • FIG. 4 shows only the droplet discharge head 2 provided on the right front side of the droplet discharge head unit 1 shown in FIG. 2 and its position adjusting mechanism. Yes.
  • the position fixing portion 23 has a V-shaped groove 24 and is configured to be able to abut the V-shaped groove 24 against the position reference pin 4 fixed to the holding portion 3. And the position fixing
  • the positioning unit 25 is abutted against a position adjusting unit 51 of the adjusting unit 5 described later, and in a direction of abutting against the position adjusting unit 51 by an elastic member 32 as an urging means provided in the holding unit 3. It is pressed and fixed by the contact portion (second contact portion T2).
  • the positioning unit 25 can be moved in the front-rear direction with respect to the holding unit 3 by moving the position adjusting unit 51 in the front-rear direction.
  • the adjustment unit 5 that adjusts the position of the droplet discharge head 2 includes a position adjustment unit 51 that contacts the positioning unit 25, a housing 53 that is provided in the holding unit 3 so as to be rotatable by a rotary shaft member 52, and rotation of the housing 53.
  • An adjustment screw 54 serving as a rotation adjustment unit for adjusting the adjustment, and an adjustment screw holding unit 55 that is fixed to the holding unit 3 and that rotatably holds the housing 53 and the adjustment screw 54 are provided.
  • the position adjusting unit 51 is provided on the front side near the lower part of the housing 53 and above the center of the rotary shaft member 52, and is configured to be movable in the front-rear direction by rotation of the housing 53 described later. . Further, the position adjustment unit 51 has a spherical tip, and the tip is in contact with the positioning unit 25.
  • the housing 53 is configured to be rotatable around a rotating shaft member 52 provided at the lower portion of the housing 53. Further, a rear surface near the upper portion of the housing 53 has a contact surface with the adjustment screw 54, and when the adjustment screw 54 moves forward while contacting the contact surface, the housing 53 has a rotation shaft. It rotates in the forward direction around the member 52. On the other hand, when the adjustment screw 54 moves backward while contacting the contact surface, the housing 53 rotates backward about the rotation shaft member 52.
  • the abutting portion (second abutting portion T2) between the position adjusting portion 51 and the positioning portion 25 and the abutting portion between the adjusting screw 54 and the housing 53 are located above the rotating shaft member 52 of the housing 53, respectively. Therefore, when the housing 53 rotates forward (or rearward), the respective contact portions also move forward (or rearward). Further, the distance from the center of the rotation shaft member 52 to the contact portion between the position adjustment unit 51 and the positioning unit 25 is shorter than the distance from the center of the rotation shaft member 52 to the contact portion between the housing 53 and the adjustment screw 54. Therefore, the moving distance of the position adjusting unit 51 is smaller than the moving distance of the adjusting screw 54, and a high reduction ratio is obtained.
  • the droplet discharge head 2 is fixed to the position reference pin 4 by a position fixing portion 23 so as to be rotatable. Therefore, the position adjustment unit 51 can move along the axis of the position reference pin 4 by moving the position in the front-rear direction, and adjust the rotation angle with respect to the front-rear, left-right direction perpendicular to the droplet discharge direction. Can do.
  • the adjustment screw 54 is held by the adjustment screw holding portion 55 in a state where the adjustment screw 54 is rotatable, and can be moved in the front-rear direction by rotating.
  • the rotation of the housing 53 can be controlled by moving the position of the adjustment screw 54.
  • the distance between the origin O and A1 is d 1
  • the distance between the origin O and A1 in the front-rear direction is x 1
  • the angle from the axis parallel to the front direction passing through the origin O to A1 is ⁇ 1
  • the distance between the origin O and the reference part B1 Is the distance d 2
  • the distance in the front-rear direction between the origin O and the reference part B 1 is x 2
  • the angle from the axis parallel to the front direction passing through the origin O to the reference part B 1 is ⁇ 2 .
  • the absolute value of the absolute value and x 2 of the variation of the amount of change x 1 by the rotation (dx 1 / d ⁇ ) of the housing 53 (dx 2 / d ⁇ ) can be expressed by the following equation by differentiating.
  • the amount of movement of the position adjusting unit 51 (the amount of change of x 2 ) is changed to the amount of movement of the adjusting screw 54. it can be smaller than (the amount of change in x 1).
  • the droplet discharge head 2 Moves in the direction of rotation along the axis of the position reference pin 4.
  • the amount of change in x 1 (dx 1 / d ⁇ ) and the amount of change x 2 (dx 2 / d ⁇ ) are each small, since the movement amount in the lateral direction is very small relative to the amount of movement in the longitudinal direction
  • the movement amount of the droplet discharge head 2 can be approximated to the movement amount of the position adjustment unit 51 in the front-rear direction.
  • the shape of the position adjustment unit 51 an example in which the tip of the position adjustment unit 51 is spherical has been described.
  • the shape is not limited to the above example, and the shape of the position adjustment unit 51 is appropriately determined.
  • the position adjusting unit 51 can have a needle shape with a sharp tip (see FIG. 7) or a rectangular parallelepiped shape (see FIG. 8).
  • the pointed portion of the needle shape and the contact portion of the positioning unit 25 are set as the reference portion B1, and d 1 , ⁇ as in the present embodiment.
  • the relational expression of 1 , d 2 and ⁇ 2 can be expressed by the above formula (1).
  • the position adjusting unit 51 has a rectangular parallelepiped shape, d 1 , ⁇ 1 , d, as in the present embodiment, with the corner portion of the rectangular parallelepiped shape and the contact portion of the positioning unit 25 as the reference part B1.
  • the relational expression of 2 and ⁇ 2 can be expressed by the above formula (1).
  • the reference part B1 can be arbitrarily determined as long as it is a part that serves as a reference for position movement in the position adjustment unit 51.
  • the center of gravity of the position adjustment part 51 may be used as the reference part B1.
  • the tip of the position adjustment unit 51 is spherical as in the present embodiment, the position of the contact portion between the position adjustment unit 51 and the positioning unit 25 moves on the spherical surface.
  • the contact portion cannot be the reference portion B1.
  • the contact portion between the position adjustment unit 51 and the positioning unit 25 does not move, so that the contact portion can be used as the reference portion B1. It is.
  • the position after the movement of A1 is A2
  • the rotation angle of the housing 53 when the adjustment screw 54 is moved dx forward, ⁇ , the spherical center of the tip of the position adjustment unit 51 is the reference part B1
  • the housing 53 is the angle A relational expression in the front-rear direction and the up-down direction, assuming that the position after the movement of the reference portion B1 when ⁇ rotates is B2.
  • the vertical distance between O and A1 is l 1
  • the longitudinal distance between O and A1 is r 1
  • the angle from the axis parallel to the upward direction passing through O to ⁇ 1 is ⁇ 1
  • the upward direction passing through O is parallel to the upward direction
  • the angle from the axis to A2 is ⁇ 1
  • the distance in the front-rear direction between O and the reference part B1 is l 2
  • the vertical distance between O and the reference part B1 is r 2
  • FIG. 10B is a comparative example with respect to the present embodiment.
  • the adjustment screw 54 having the same screw pitch 0.5 ⁇ m / 1 rotation as that of the present embodiment is used, the amount of displacement of the tip of the adjustment screw 54 is shown.
  • the position adjustment displacement amount a relational expression between the screw operation amount (degrees) and the position adjustment displacement amount ( ⁇ m) is shown. Since the adjustment screw 54 of the comparative example moves in proportion to the angle (screw operation amount) by which the screw is rotated, the relational expression between the screw operation amount (degree) and the position adjustment displacement amount ( ⁇ m) is a linear equation. expressed.
  • l 1 , r 1 , l 2 , r 2 , and the screw pitch have been described with examples of numerical values, it can be changed as appropriate.
  • the value it is possible to obtain a higher reduction ratio and to improve the linearity of the relational expression between the screw operation amount and the position adjustment displacement amount.
  • ds / dx can be reduced and the reduction rate can be increased.
  • r 1 or decreasing l 2 the linearity of the relational expression between the screw operation amount and the position adjustment displacement amount can be improved.
  • Modification 1 is a modification in the case where position adjustment is performed at two different locations of the droplet discharge head 2, and an example will be described with reference to FIG.
  • FIG. 11 shows only the positional relationship between the droplet discharge head 2 and the adjustment unit 5 in a schematic view, and details are omitted.
  • the droplet discharge head 2 includes a positioning unit 25 on one side surface parallel to the droplet discharge direction (vertical direction) of the droplet discharge head 2 and on the side surface facing the side surface. Specifically, for example, one positioning unit 25 is provided on each of the left side surface and the right side surface of the droplet discharge head 2.
  • each positioning portion 25 is pressed in a direction to abut against the position adjusting portion 51 by an elastic member (not shown) as an urging means provided in the holding portion 3 as in the present embodiment. And are fixed by respective contact portions (first contact portion T1 and second contact portion T2).
  • the position of the droplet discharge head 2 can be adjusted to a plane (front / back / left / right direction) perpendicular to the droplet discharge direction with respect to the holding unit 3 by moving the position adjustment unit 51 in the front-rear direction.
  • the droplet discharge head 2 can be moved in the front-rear direction.
  • the position adjusting unit 51 on the other side is fixed so as to be rotatable, so that the position of the position adjusting unit 51 on one side in the front-rear direction is fixed.
  • the droplet discharge head 2 can be rotationally moved with respect to the front and rear, left and right surfaces.
  • Modification 2 is a modification in the case where position adjustment is performed at three different locations of the droplet discharge head 2, and an example will be described with reference to FIG. For convenience of explanation, FIG. 12 shows only the positional relationship between the droplet discharge head 2 and the adjustment unit 5 in a schematic view, and details are omitted.
  • the adjustment unit 5 is provided on each of the left side surface and the rear side surface of the droplet discharge head 2, and the position adjustment unit 51 of each adjustment unit 5 is provided.
  • the liquid droplet ejection head 2 is in direct contact with the main body.
  • the droplet discharge head 2 is pushed against the position adjusting unit 51 from the front side and the right side of the droplet discharge head 2 by an elastic member (not shown) as an urging means provided in the holding unit 3. It is pressed in the direction of contact, and is fixed by the respective contact portions (first contact portion T1, second contact portion T2, and third contact portion T3).
  • the position adjustment unit 51 provided on the rear side moves in the front-rear direction and the position adjustment unit 51 provided on the left side moves in the left-right direction.
  • the position can be adjusted with respect to a smooth surface (front / rear / left / right direction).
  • Modification 3 is a modification of the configuration of the adjustment unit 5, and an example will be described with reference to FIG.
  • FIG. 13 schematically shows the droplet discharge head 2, the holding unit 3 that simply shows the front and rear portions of the droplet discharge head 2, and the adjustment unit 5 for convenience of explanation. It is shown in the figure, and details are omitted.
  • the droplet discharge head 2 includes a holding plate 26 that protrudes in the left-right direction between the droplet discharge unit 21 and the ink chamber 22, and includes an adjustment unit 5 similar to the present embodiment on the upper surface of the holding plate 26.
  • a positioning unit 25 is provided on the front side of the holding unit 3 with the droplet discharge head 2 interposed therebetween, and the droplet discharge head 2 is moved forward by an elastic member (not shown) provided on the rear side of the holding unit 3.
  • the position adjustment unit 51 is fixed in a state where the position adjustment unit 51 is pressed against the positioning unit 25. Then, the position of the liquid droplet ejection head 2 can be moved relative to the holding unit 3 by moving the position adjusting unit 51 in the front-rear direction.
  • Modification 4 is a modification of the configuration of the adjustment unit 5, and an example will be described with reference to FIG. 14. 14 schematically shows the droplet discharge head 2, the holding unit 3 that simply shows the front and rear portions of the droplet discharge head 2, and the adjustment unit 5 for convenience of explanation. It is shown in the figure, and details are omitted.
  • the droplet discharge head 2 includes a holding plate 26 that protrudes in the left-right direction between the droplet discharge portion 21 and the ink chamber 22.
  • the adjustment unit 5 of the present embodiment is provided on the rear side of the holding unit 3 with the droplet discharge head 2 interposed therebetween, and the position adjustment unit 51 of the adjustment unit 5 contacts the rear side surface of the holding plate 26. It is provided to touch. Further, the droplet discharge head 2 is pressed backward by an elastic member (not shown) provided on the front side of the holding unit 3, and the position adjusting unit 51 is fixed in a state of being pressed against the holding plate 26. ing.
  • the position of the liquid droplet ejection head 2 can be moved relative to the holding unit 3 by moving the position adjusting unit 51 in the front-rear direction.
  • the position adjusting unit 51 is configured to abut against the holding plate 26, the abutting portion can be appropriately changed as long as it is a part of the droplet discharge head 2.
  • the liquid droplet ejection head unit 1 of the present invention adjusts the position of the liquid droplet ejection head 2 by moving the position adjustment unit 51 that contacts the liquid droplet ejection head 2, and the liquid with respect to the recording medium. Drop landing accuracy can be improved.
  • the position adjustment mechanism according to the present invention is configured to obtain a high reduction ratio with a simple configuration, and can be provided by appropriately changing the design according to the shape and arrangement conditions of the droplet discharge head 2. Therefore, it is very useful as a means for adjusting the position of the droplet discharge head 2 or the like.
  • the adjustment unit 5 can reduce the movement amount of the position adjustment unit 51 with respect to the movement amount of the adjustment screw 54 by adopting a configuration that satisfies the above-described formula (1).
  • the distance from the center of the rotation shaft member 52 of the housing 53 to the contact portion between the position adjustment unit 51 and the droplet discharge head 2 is determined between the center of the rotation shaft member 52 of the housing 53 and the adjustment screw 54 and the housing 53. It is shorter than the distance to the contact part.
  • the tip of the position adjusting unit 51 of the present invention has a spherical shape, and the tip is in contact with the positioning unit 25. With such a configuration, the contact portion between the position adjusting unit 51 and the positioning unit 25 can stably move on the spherical surface, so that stable position adjustment can be performed.
  • the rotation angle can be adjusted with respect to the direction perpendicular to the droplet discharge direction.
  • the position of the droplet discharge head 2 can be adjusted by moving the position of the position adjusting unit 51 at one location, and the position adjustment operation can be performed more easily.
  • the absolute position of the droplet discharge head 2 can be adjusted with respect to a surface perpendicular to the droplet discharge direction, so that the position can be adjusted with higher accuracy.
  • the adjustment unit 5 is provided on the holding plate 26 of the droplet discharge head 2, and the position relative to the holding plate 26 of the droplet discharge head 2 as in Modification 4. It is also possible to adjust the position by bringing the adjusting unit 51 into contact. Even in such a configuration, the position of the droplet discharge head 2 can be adjusted with high accuracy.
  • Modification 1 and Modification 2 an example in which one to three adjustment units 5 are provided for the droplet discharge head 2 is shown.
  • the configuration includes one or more droplet discharge heads 2, the number of adjustment units 5 can be changed as appropriate.
  • the arrangement location of the adjustment unit 5 is not limited to the embodiment of the present embodiment, the first modification, and the second modification, and can be appropriately changed.
  • a position adjustment method performed by contacting the position adjusting unit 51 of the adjusting unit 5 a method of contacting the positioning unit 25 of the droplet discharge head 2, a method of contacting the main body of the droplet discharge head 2,
  • the position adjustment part 51 is shown.
  • the place and method of contacting the surface can be appropriately changed.
  • the V-shaped groove 24 of the position fixing unit 23 is fixed to the position reference pin 4 so as to be rotatable.
  • the configuration can be changed as appropriate.
  • the position reference pin 4 is fixed to the holding portion 3, the position reference pin 4 can be appropriately changed as long as the position fixing portion 23 can be fixed. It is good also as a structure which can be moved to right and left.
  • the tip of the position adjusting unit 51 is spherical, but if the contact surface of the positioning unit 25 with which the tip is in contact is spherical, the tip may be flat.
  • the droplet discharge head 2 is configured to discharge droplets such as ink using a piezoelectric element, but may be provided with a mechanism capable of discharging droplets, for example, thermal (electrothermal conversion element) It is good to use.
  • any means capable of urging the droplet discharge head 2 toward the position reference pin 4 and the position adjusting unit 51 can be changed as appropriate.
  • the main body of the droplet discharge head 2 may be directly urged by one elastic member, and an elastic member 31 and an elastic member 32 provided between two adjacent droplet discharge heads 2 may be used. The same elastic member may be used.
  • a configuration may be adopted in which a fixing screw or the like is further provided so as to be fixed to the holding unit 3.
  • the present invention can be used for a droplet discharge head unit including a droplet discharge head, a method for adjusting the position of the droplet discharge head, and an image forming apparatus such as an ink jet recording apparatus including the droplet discharge head unit.

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Abstract

La présente invention vise à fournir une unité de tête de déversement de gouttelette de liquide, un procédé pour régler la position d'une tête de déversement de gouttelette de liquide, et un appareil de formation d'image, qui présentent une haute précision d'une position d'atterrissage de gouttelette de liquide sur un support d'enregistrement et qui permettent un réglage facile de la précision de position. L'unité de tête de déversement de gouttelette de liquide est caractérisée par le fait qu'elle comprend : une tête de déversement de gouttelette de liquide (2) pour déverser des gouttelettes de liquide; une section de maintien (3); un logement (53) qui peut être tourné par un élément d'arbre de rotation (52); une vis de réglage (54); et une section de réglage de position (51) placée dans le logement (53), et en satisfaisant la formule (1). (d1 représente une distance du centre de l'élément d'arbre de rotation (52) à une partie de contact entre la vis de réglage (54) et le logement (53). θ1 représente un angle, à partir de l'axe qui passe à travers le centre de l'élément d'arbre de rotation (52) et est parallèle à la direction de déplacement de la tête de déversement de gouttelette de liquide (2), à la partie de contact entre la vis de réglage (54) et le logement (53). d2 représente une distance du centre de l'élément d'arbre de rotation (52) à une partie de référence (B1). θ2 représente un angle, à partir de l'axe qui passe à travers le centre de l'élément d'arbre de rotation (52) et est parallèle à la direction de déplacement de la tête de déversement de gouttelette de liquide (2) à la partie de référence (B1).
PCT/JP2016/050556 2015-01-09 2016-01-08 Unité de tête de déversement de gouttelette de liquide, procédé de réglage de position de tête de déversement de gouttelette de liquide, et appareil de formation d'image Ceased WO2016111365A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016568764A JP6686908B2 (ja) 2015-01-09 2016-01-08 液滴吐出ヘッドユニット、液滴吐出ヘッドの位置調整方法及び画像形成装置

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Application Number Priority Date Filing Date Title
JP2015-003459 2015-01-09
JP2015003459 2015-01-09

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WO2016111365A1 true WO2016111365A1 (fr) 2016-07-14

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