This patent application is based on and claims priority pursuant to 35 U.S.C. § 119(a) to Japanese Patent Application No. 2022-181685, filed on Nov. 14, 2022, in the Japan Patent Office, the entire disclosure of which is hereby incorporated by reference herein.
Embodiments of the present disclosure relate to a recording-head position adjustment mechanism to adjust a position of a recording head that discharges a liquid droplet, and further relate to a recording-head module and an image forming apparatus, including the recording-head position adjustment mechanism.
In an image forming apparatus, such as an inkjet printer, a technique is widely known in the art that adjusts the positions of recording heads to form a good image.
Specifically, the image forming apparatus includes the recording heads (printing modules) for a plurality of colors that are arranged so as to face a sheet conveyed by a conveyor. The recording heads for the plurality of colors discharge liquid droplets toward the conveyed sheet to form a desired color image on the sheet.
A technique is known in which an angle adjustment mechanism (discharge angle adjustment mechanism) adjusts an angle of the recording heads to arrange the recording heads with respect to a drum with high accuracy.
An embodiment of the present disclosure includes a recording-head position adjustment mechanism. The recording-head position adjustment mechanism includes a supporting member supporting a recording head that discharges a liquid droplet, the recording head including an abutting portion. The recording-head position adjustment mechanism includes a positioner on which the abutting portion abuts, the positioner to which the abutting portion is fixed so as to determine a position of the recording head in a longitudinal direction of the recording head with respect to the supporting member. A position of the positioner in the longitudinal direction with respect to the supporting member is adjustable.
An embodiment of the present disclosure includes a recording-head module including a recording head to discharge a liquid droplet, and the recording-head position adjustment mechanism described above. The recording head and the recording-head position adjustment mechanism are unitized.
An embodiment of the present disclosure includes an image forming apparatus including a recording head to discharge a droplet, and the recording-head position adjustment mechanism described above.
A more complete appreciation of embodiments of the present disclosure and many of the attendant advantages and features thereof can be readily obtained and understood from the following detailed description with reference to the accompanying drawings, wherein:
The accompanying drawings are intended to depict embodiments of the present disclosure and should not be interpreted to limit the scope thereof. The accompanying drawings are not to be considered as drawn to scale unless explicitly noted. Also, identical or similar reference numerals designate identical or similar components throughout the several views.
In describing embodiments illustrated in the drawings, specific terminology is employed for the sake of clarity. However, the disclosure of this specification is not intended to be limited to the specific terminology so selected and it is to be understood that each specific element includes all technical equivalents that have a similar function, operate in a similar manner, and achieve a similar result.
Referring now to the drawings, embodiments of the present disclosure are described below. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Embodiments of the present disclosure are described in detail with reference to the accompanied drawings. In the drawings, like reference signs denote like elements, and redundant description may be appropriately simplified or omitted.
The overall configuration and operation of an image forming apparatus 1 according to the present embodiment is described below with reference to
In
The image forming apparatus 1 further includes a separator 6 to separate the sheet P from the conveyance drum 2, a conveyance belt 7 to convey the sheet P separated from the conveyance drum 2, and an output tray 8 onto which the printed sheet P is ejected and stacked.
The image forming apparatus 1 further includes recording heads (printing modules) 10Y, 10M, 10C, 10K, 10S1, and 10S2 serving as image forming units for printing, e.g., letters and images by an inkjet method, supporting members 200 to support (suspend) the recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2, and a base frame 30 to hold the supporting members 200. The supporting member 200 includes a first support 19 and a second support 20.
The image forming apparatus 1 according to the present embodiment forms a color image. As illustrated in
Since the six recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 have substantially the same structure except that the colors (types) of inks used for printing are different, the suffixes Y, M, C, K, S1, and S2 attached to the reference numeral of the recording head 10 are omitted in, for example,
For the sake of understanding the recording head 10, the recording head 10 indicated by a solid line is not inclined in
As illustrated in
The operation of the image forming apparatus 1 is briefly described with reference to
First, when a print command is input together with image data from, e.g., a personal computer to the controller of the image forming apparatus 1, the sheet P is fed from the sheet tray 3 by a sheet feed roller. The sheet P fed from the sheet tray 3 is conveyed toward the conveyance drum 2 by a conveyance roller pair 4. Meanwhile, in the recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 for the respective colors, the input image data are converted into writing data of the respective colors.
The sheet P conveyed to the conveyance drum 2 is gripped by the gripper 5 and positioned on the conveyance drum 2. The conveyance drum 2 conveys the sheet P while rotating counterclockwise.
As the conveyance drum 2 rotates, the sheet P is conveyed in the direction indicated by arrow A1 in
The sheet P, on which the desired image has been formed, is separated from the conveyance drum 2 by the separator 6. The sheet P separated from the conveyance drum 2 is conveyed by the conveyance belt 7 and ejected onto the output tray 8.
A description is given of a recording-head position adjustment mechanism to adjust the position of the recording head 10 that discharges ink (liquid droplets) in the image forming apparatus 1 having such a configuration.
The recording-head position adjustment mechanism according to the present embodiment includes discharge angle adjusters 56 and 57, and a longitudinal-direction position adjuster including a positioner 40, a spacer 41, and a fixing screw 45. The discharge angle adjusters 56 and 57 adjust a direction of liquid droplets discharged from the nozzle 10a of the recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 (i.e., a discharge angle θ, see
As illustrated in, for example,
In other words, the recording head 10 is detachably (exchangeably) installed with respect to the image forming apparatus 1 so that the recording head 10 can be drawn out from the image forming apparatus 1 in the +Y direction or installed to the image forming apparatus 1 in a direction −Y direction, which is opposite the +Y direction. When ink stored in the ink tank 10b is depleted, the recording head 10 is drawn out, and a new recording head 10 is installed for replacement.
The recording-head position adjustment mechanism includes the first support 19 and the second support 20. The first support 19 supports one end of the recording head 10 in the longitudinal direction (i.e., a first predetermined position). The second support 20 supports the other end of the recording head 10 in the longitudinal direction (i.e., a second predetermined position different from the first predetermined position). In the following, the one end of the recording head 10 in the longitudinal direction thereof is referred to as a “first end,” and the other end of the recording head 10 is referred to as a “second end.”
The recording head 10 is removably installed in the longitudinal direction (i.e., an installation direction). The longitudinal direction, which is ±Y directions, is substantially perpendicular to the conveyance direction of the sheet P indicated by the blank arrow in
Specifically, the supporting member 200 includes a pair of the first supports 19 and a pair of the second supports 20 sandwiching the recording head 10 in the substantially horizontal direction. In the present embodiment, as illustrated in
As illustrated in, for example,
In substantially the same manner, the second support 20 includes a second upper grooved roller 21Ba and a second lower columnar roller 21Bb serving as the first support portion at the second end, and two second columnar rollers 22B serving as the second support portion at the second end. The second upper grooved roller 21Ba and the second lower columnar roller 21Bb engage and support the first edge of the recording head 10 in the transverse direction at the second end in the longitudinal direction. The second columnar rollers 22B support the second edge of the recording head 10 in the transverse direction at the second end in the longitudinal direction so that the recording head 10 is movable on the second columnar rollers 22B. The discharge angle adjuster 56 described below is installed in the second support 20.
Specifically, the recording head 10 includes a ridged rail 11a and a flat rail 11b as a first slider at the first edge and a flat rail 12 as a second slider at the second edge in the transverse direction. The transverse direction is perpendicular to the longitudinal direction and substantially the same as the conveyance direction of the sheet P. The ridged rail 11a and the flat rail 11b are disposed vertically apart. As illustrated in
The first upper grooved roller 21Aa and the second upper grooved roller 21Ba have a V-shaped groove on the outer circumferential surface and are rotatably supported by the first support 19 and the second support 20. The first lower columnar roller 21Ab, the second lower columnar roller 21Bb, the first columnar rollers 22A, and the second columnar rollers 22B have a flat outer circumferential surface and are rotatably supported by the first support 19 and the second support 20.
The first upper grooved roller 21Aa and the first lower columnar roller 21Ab (first support portion at the first end) disposed vertically apart engage the ridged rail 11a and the flat rail 11b (first slider) disposed vertically apart on the recording head 10, respectively. The two first columnar rollers 22A (second support portion at the first end) contact the flat rail 12 (second slider) of the recording head 10 so as to sandwich the flat rail 12 from above and below.
In substantially the same manner, the second upper grooved roller 21Ba and the second lower columnar roller 21Bb (first support portion at the second end) disposed vertically apart engage the ridged rail 11a and the flat rail 11b disposed vertically apart on the recording head 10, respectively. The second columnar rollers 22B (second support portion at the second end) contact the flat rail 12 of the recording head 10 so as to sandwich the flat rail 12 (second slider) from above and below.
While the first upper grooved roller 21Aa, the first lower columnar roller 21Ab, the second upper grooved roller 21Ba, the second lower columnar roller 21Bb, the first columnar rollers 22A, and the second columnar rollers 22B rotate, the ridged rail 11a and the flat rail 11b, and the flat rail 12 move on the first upper grooved roller 21Aa, the first lower columnar roller 21Ab, the second upper grooved roller 21Ba, the second lower columnar roller 21Bb, the first columnar rollers 22A, and the second columnar rollers 22B. Thus, the recording head 10 is removably installed in ±Y directions.
As illustrated in, for example,
In substantially the same manner, the second support 20 includes other second columnar rollers 22B disposed on the opposite side of the portion where the second upper grooved roller 21Ba and the second lower columnar roller 21Bb as the first support portion at the second end are disposed so as to support another recording head 10 adjacent to the recording head 10.
With such a configuration, the plurality of the recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 can be compactly installed in the image forming apparatus 1 in the conveyance direction of the sheet P.
The recording-head position adjustment mechanism according to the present embodiment includes the discharge angle adjusters 56 and 57 that adjust a direction of liquid droplets discharged from the nozzle 10a of the recording head 10 (i.e., the discharge angle θ, see
Specifically, as illustrated in, for example,
As a result, the recording head 10 can be efficiently swung with the portion supported by the first upper grooved roller 21Aa and the second upper grooved roller 21Ba (upper supports) as a fulcrum, and the discharge angle θ can be efficiently adjusted. The discharge angle adjusters 56 and 57 are not limited to the above-described embodiments, and various types of configurations can be used.
The recording-head position adjustment mechanism according to the present embodiment may further include an inclination adjustment mechanism to adjust the inclination of the recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 in the longitudinal direction.
Such an inclination adjustment mechanism moves the second support 20 in the direction intersecting the longitudinal direction (i.e., the direction of conveyance of the sheet P and the transverse direction) with respect to the first support 19 to adjust the inclination of the recording head 10.
Specifically, the inclination adjustment mechanism includes an inclination adjustor to move the second upper grooved roller 21Ba and the second lower columnar roller 21Bb (the first support portion at the second end) in the transverse direction intersecting the longitudinal direction. Accordingly, the first edge in the transverse direction of the recording head 10 at the second end in the longitudinal direction is moved following the movement of the second upper grooved roller 21Ba and the second lower columnar roller 21Bb. As a result, the recording head 10 is swung around the first end in the longitudinal direction (i.e., the position of the first upper grooved roller 21Aa and the first lower columnar roller 21Ab), thus adjusting the inclination of the recording head 10.
The configuration of the recording-head position adjustment mechanism according to the present embodiment is described below.
The recording-head position adjustment mechanism according to the present embodiment includes, in addition to the above-described discharge angle adjusters 56 and 57, the longitudinal-direction position adjuster including the positioner 40, the spacer 41, and the fixing screw 45. The longitudinal-direction position adjuster adjusts the position of the recording head 10 in the longitudinal direction.
As described above, the recording-head position adjustment mechanism according to the present embodiment includes the supporting member 200, i.e., the first support 19 and the second support 20 to support the recording head 10. The first support 19 includes the first upper grooved roller 21Aa and the first lower columnar roller 21Ab which serve as the first support portion at the first end, and the first columnar rollers 22A which serve as the second support portion at the first end. The second support 20 includes the second upper grooved roller 21Ba and the second lower columnar roller 21Bb which serve as the first support portion at the second end, and the second columnar rollers 22B which serve as the second support portion at the second end.
As illustrated in, for example,
The longitudinal-direction position adjuster (recording-head position adjustment mechanism) can adjust the position of the positioner 40 in the longitudinal direction of recording head 10 with respect to the first support 19 and the second support 20 (the body of the image forming apparatus 1).
Specifically, the positioner 40 is provided only on one support portion (i.e., the second support 20 to which the second upper grooved roller 21Ba and the second lower columnar roller 21Bb serving as the first support portion at the second end are installed, see
The positioner 40 is fixable to the second support 20 with the spacer 41 interposed between the positioner 40 and the second support 20 (support). Specifically, as illustrated in
Further, the abutting portion 15 includes a first pin 15a that engages a first hole 20x formed in the second support 20 (one support portion) via a through-hole 40x (first through-hole) formed in the positioner 40. The abutting portion 15 is a substantially plate-like member made of a metal material, and is installed in the upper portion of the recording head at the second end in the in the longitudinal direction and the first edge in the transverse direction.
The abutting portion 15 is fixable to the second support 20 via the positioner 40 and the spacer 41. Specifically, as illustrated in
In the present embodiment, the position of the positioner 40 in the longitudinal direction with respect to the second support 20 (support) is adjusted by adjusting the number of the spacers 41 having the same thickness (four in the example of
Specifically, the spacer 41 is made of a metal material and has a thickness of approximately 0.3 mm to 0.6 mm (0.5 mm in the present embodiment). The standard number (reference setting) of the spacers 41 is five, and the position of the recording head 10 in the longitudinal direction is adjusted by increasing or decreasing the number as needed.
More specifically, the position of the recording head 10 in the longitudinal direction is adjusted by adjusting the number of the spacers 41 so that a distance N between a reference portion 100x of a jig 100 (see
In the present embodiment, the position of the positioner 40 in the longitudinal direction with respect to the second support 20 is adjusted by adjusting the number of the spacers 41 having the same thickness. Alternatively, the position of the positioner 40 in the longitudinal direction with respect to the second support 20 may be adjusted by selecting one or more spacers from multiple spacers having different thicknesses.
As described above, since the recording-head position adjustment mechanism according to the present embodiment can adjust the position of the positioner 40 in the longitudinal direction with respect to the second support 20, the position of the recording head in the longitudinal direction is accurately adjusted. Accordingly, an image is accurately formed on the sheet P at a target position in the longitudinal direction by the recording head 10.
Specifically, the effects of the above-described embodiment are described in more detail with reference to
As a modification of the above embodiment of the present disclosure,
In the above-described embodiment, each of the six recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2 includes a single head longer than the width of the sheet P. In the modification, the array-type recording heads 10Y, 10M, 10C, and 10K illustrated in
As illustrated in
As illustrated in, for example,
Specifically, the recording head 10 includes a first auxiliary plate 16 in the upper portion at the second end in the longitudinal direction and at the second edge in the transverse direction. The first auxiliary plate 16 includes the second pin 16a. The recording head 10 further includes a second auxiliary plate 17 in the upper portion at the first end in the longitudinal direction and at the first edge in the transverse direction. The second auxiliary plate 17 includes the second pin 17a. The recording head 10 further includes a third auxiliary plate 18 in the upper portion at first end in the longitudinal direction and at the second edge in the transverse direction. The third auxiliary plate 18 includes the second pin 18a. The first auxiliary plate 16, the second auxiliary plate 17, and the third face the first supports 19 and the second support 20 respectively with the clearance R therebetween, without contacting the first supports 19 and the second support 20. In other words, only the abutting portion 15 tightly contacts the second support 20 via the positioner 40 and the spacer 41, while the first auxiliary plate 16, the second auxiliary plate 17, and the third auxiliary plate 18 do not tightly contact the first supports 19 and the second support 20.
As described above, in the present embodiment, four pins (one first pin 15a and three second pins 16a to 18a) are fitted into the hole portions (one first hole 20x and the three second holes) of the first support 19 and the second support 20.
Accordingly, in the recording head 10 supported by the rollers 21a, 21b, and 22 of the first support 19 and the second support 20, the four pin (i.e., the first pin 15a and the second pins 16a to 18a) are respectively fitted into the four holes, and thus the recording head is more firmly supported by the first support 19 and the second support 20.
With reference to
Further, the abutting portion 15 (abutting plate), the first auxiliary plate 16, the second auxiliary plate 17, and the third auxiliary plate 18 are formed so as to project in the upward direction from the recording head 10. Further, as illustrated in
In the present embodiment, among the four pins, i.e., the first pin 15a and the second pin 16a to 18a, only one pin, i.e., the first pin 15a is fitted to the second support 20 without a clearance, and the other pins, i.e., the second pins 16a to 18a are fitted to the first support 19 and the second support 20 with the clearances R.
By contrast, in the present embodiment, since only one pin, i.e., the first pin 15a among the four pins, i.e., the first pin 15a and the second pins 16a to 18a is fitted to the second support 20 without a clearance (since the abutting portion 15 is provided at only one place), the inclination (or the twist) of the recording head 10 as described above is reduced.
As illustrated in
Specifically, in the recording head 10, the abutting portion 15 (abutting plate) disposed at the second end in the longitudinal direction and the first edge in the transverse direction is provided on the front side (the left side in
With this configuration, the operation of adjusting the position of the recording head in the longitudinal direction by increasing or decreasing the number of the spacers 41 described above can be easily performed on the front side (operation side) in the installation direction. Further, since the position of the abutting portion 15 (abutting plate) in the longitudinal direction is offset, the abutting portion 15 is more likely to abut against the positioner 40.
As described above with reference to, for example,
Further, in the present embodiment, after the position of the positioner 40 in the longitudinal direction with respect to the second support 20 (supporting member) is adjusted by increasing or decreasing the number of the spacers 41, the adjustment by the discharge angle adjusters 56 and 57 is performed, and then the abutting portion 15 is fixed to the second support 20 via the positioner 40 by screwing (fixed with the fixing screw 45).
First, as illustrated in
At this time, among the four pins, i.e., the first pin 15a and the second pins 16a to 18a, only one pin, i.e., the first pin 15a is fitted to the second support 20 without a clearance therebetween, and the other pins, i.e., the second pins 16a to 18a are fitted to the first support 19 and the second support 20 with the clearance R therebetween. The positioner 40 is temporarily fixed to the second support 20 by the second fixing screws 46 (see
Subsequently, the position of the positioner 40 in the longitudinal direction is determined by increasing or decreasing the number of the spacers 41 so that the distance N between the reference portion 100x of the jig 100 (see
Subsequently, after the discharge angle θ of the recording head 10 is adjusted by the discharge angle adjusters 56 and 57, the abutting portion 15 is screwed (fixed) to the second support 20 by the fixing screw 45 via the positioner 40 and the one or more spacers 41.
Through such a procedure, the discharge angle θ of the recording head 10 and the position of the recording head 10 in the longitudinal direction are efficiently adjusted.
Modification
As illustrated in
Specifically, after the position adjustment of the recording head 10 in the longitudinal direction is completed, the second spacer 44 is installed so as to fill the clearance between the second support 20 and the first auxiliary plate 16.
With this configuration, the second supports 20 firmly supports the recording head in an auxiliary manner without causing the inclination or the twist of the recording head 10 as described above with reference to
The description provided above with reference to
Further, the description provided above with reference to
As described above, the recording-head position adjustment mechanism according to the present embodiment adjusts the position of the recording head 10 that discharges liquid droplets. The recording-head position adjustment mechanism includes the second support that supports the recording head 10, and the positioner 40 on which the abutting portion 15 of the recording head 10 abuts is fixed so as to determine the position of the recording head in the longitudinal direction with respect to the second support 20. The recording-head position adjustment mechanism can adjust the position of the positioner 40 in the longitudinal direction with respect to the second support 20.
Thus, the position of the recording head 10 in the longitudinal direction is accurately adjusted.
In the above-described embodiments, the image forming apparatus 1 includes the six recording heads 10Y, 10M, 10C, 10K, 10S1, and 10S2. Alternatively, as illustrated in
Further, in the above-described embodiments, the plurality of recording heads 10Y, 10M, 10C, 10K, 10S1 and 10S2 are arranged in a radial pattern (on a curved surface) along the outer circumferential surface of the conveyance drum 2. Alternatively, when the sheet P is conveyed on a flat conveyance surface, a plurality of recording heads can be flatly arranged side by side along the flat conveyance surface.
The discharge angle adjusters 56 and 57 are not limited to the above-described embodiments, and various types of configurations can be used.
In such configurations, effects similar to those described above are also attained.
Further, in the above-described embodiments, the recording head 10 and the recording-head position adjustment mechanism including the first support 19 and the second support 20, the base frame 30, the side frame 31, and the side frame 32 can be unitized and construct a recording-head module. In that case, the recording-head module is removably installed in the image forming apparatus 1 in a single construction.
Further, in that case, the image forming apparatus 1 may include the recording-head module in which a plurality of recording-head position adjustment mechanisms and the plurality of recording heads 10Y, 10M, 10C, 10K, 10S1 and 10S2 are unitized.
In such configurations, effects similar to those described above are also attained.
The recording head position adjusting mechanism according to the related art can accurately adjust the tilt (angle) of the recording heads but cannot accurately adjust the positions of the recording heads in the longitudinal direction.
As a result, a drawback sometimes occur that the position of the image formed on the sheet in the longitudinal direction is misaligned from the intended position.
According to one aspect of the present disclosure, a recording-head position adjustment mechanism, a recording-head module, and an image forming apparatus are provided that accurately adjusts the position of a recording head in the longitudinal direction.
The above-described embodiments are illustrative and do not limit the present invention. Thus, numerous additional modifications and variations are possible in light of the above teachings. For example, elements and/or features of different illustrative embodiments may be combined with each other and/or substituted for each other within the scope of the present invention. Further, the number, position, and shape of the components described above are not limited to those embodiments described above. Desirable number, position, and shape can be determined to perform the present disclosure.
Aspects of the present disclosure may be, for example, as follows.
Aspect 1
According to Aspect 1, a recording-head position adjustment mechanism adjusts a position of a recording head that discharges a liquid droplet.
The recording-head position adjustment mechanism includes a supporting member to support the recording head.
The recording-head position adjustment mechanism includes a positioner to which the abutting portion abuts and is fixed so as to determine a position of the recording head in a longitudinal direction of the recording head with respect to the supporting member.
A position of the positioner in the longitudinal direction with respect to the supporting member is adjustable.
Aspect 2
According to Aspect 2, in the recording-head position adjustment mechanism of the Aspect 1, the positioner is fixable to the supporting member with a spacer interposed between the positioner and the supporting member.
The abutting portion is fixable to the supporting member via the positioner and the spacer.
The position of the positioner in the longitudinal direction with respect to the supporting member is adjusted by adjusting the number of the spacers having the same thickness or by selecting one or more spacers from the spacers having different thicknesses.
Aspect 3
According to Aspect 3, in the recording-head position adjustment mechanism of the Aspect 1 or 2, the supporting member includes: a first support portion at a first end to support a first edge of the recording head in a transverse direction at the first end in the longitudinal direction of the recording head; a second support portion at the first end to support a second edge of the recording head in the transverse direction at the first end in the longitudinal direction of the recording head; a first support portion at a second end to support the first edge of the recording head in the transverse direction at the second end in the longitudinal direction of the recording head; and a second support portion at the second end to support the second edge of the recording head in the transverse direction at the second end in the longitudinal direction of the recording head.
The recording head is removably installed with the second end on a front side in an installation direction of the recording head.
A direction intersecting the longitudinal direction is a direction in which a sheet is conveyed.
The positioner is disposed at one support portion of the first support portion at the first end, the second support portion at the first end, the first support portion at the second end, and the second support portion at the second end.
Aspect 4
According to Aspect 4, in the recording-head position adjustment mechanism of the Aspect 3, the abutting portion includes a first pin that is fitted into a hole formed in the one support portion via a through-hole formed in the positioner.
The recording head includes three second pins having root portions that are respectively fitted with a clearance into three second holes in three support portions other than the one support portion among the first support portion at the first end, the second support portion at the first end, the first support portion at the second end, and the second support portion at the second end.
Aspect 5
According to Aspect 5, in the recording-head position adjustment mechanism of the Aspect 4, the one support portion is the first support portion at the second end.
A position of a face in which the first hole opens at the first support portion at the second end and a position of another face in which one of the three second holes opens at the second support portion at the second end are different in the longitudinal direction.
Aspect 6
According to Aspect 6, in the recording-head position adjustment mechanism of the Aspect 4 or 5, a second spacer is installable in a clearance between at least one of the three support portions and at least one of the three second pins.
Aspect 7
According to Aspect 7, in the recording-head position adjustment mechanism of the Aspect 4 or 5, an elastic member is disposed in a clearance between at least one of the three supporting portions and at least one of the three second pins.
Aspect 8
According to Aspect 8, the recording-head position adjustment mechanism of any one of the Aspect 1 to the Aspect 7 further includes a discharge angle adjuster to swing the recording head supported by the supporting member to adjust a discharge direction in which the liquid droplet is discharged.
An adjustment by the discharge angle adjuster is performed after an adjustment of the position of the positioner in the longitudinal direction with respect to the supporting member is performed, and subsequently the abutting portion is screwed and fixed to the supporting member via the positioner.
Aspect 9
According to Aspect 9, a recording-head module includes a recording head to discharge a liquid droplet and the recording-head position adjustment mechanism of any one of the Aspect 1 to the Aspect 8. The recording head and the recording-head position adjustment mechanism are unitized.
Aspect 10
According to Aspect 10, an image forming apparatus includes the recording-head position adjustment mechanism of any one of the Aspect 1 to the Aspect 8.
Number | Date | Country | Kind |
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2022-181685 | Nov 2022 | JP | national |