JP7346159B2 - Lever rotation mechanism - Google Patents

Description

The present invention is used for lever rotation mechanisms, particularly when changing the position of an ink head of an inkjet printer. This invention relates to a supported lever rotation mechanism.

For example, a large inkjet printer called a UV inkjet printer prints by ejecting ink onto media (print media) of various thicknesses. In this type of large inkjet printer, printing is performed by mounting media on a platen (bed), but as the thickness of the media changes, the distance from the ink head that ejects ink changes. In order to perform proper printing in an inkjet printer, it may be necessary to change the position of the ink head by moving it, for example, in the vertical direction. As a technique for changing the position of an ink head by moving it up and down in this manner, there is a technique described in, for example, Patent Document 1 listed below. In this prior art, the rotational driving force of one motor whose rotating shaft is oriented vertically is divided by two endless belts, and two screw propulsion mechanisms that are oriented vertically and rotated by the respective endless belts are connected to the ink head. is placed horizontally apart from the carriage on which the ink head is mounted, and by driving their screw propelling mechanisms synchronously with the rotational driving force of one motor, the carriage is propelled up and down, and the ink head is Configured to change position.

Patent No. 6530207

With respect to the ink head position changing mechanism of Patent Document 1, there is a demand for changing the position of the ink head with a simpler configuration. Specifically, when the manual lever is rotated in the vertical direction, the ink head is moved vertically in steps. In such a configuration, a rotating shaft is cantilevered in a substantially horizontal direction on a support portion that supports the lever rotation mechanism, and the lever member may be rotatably supported on this rotating shaft. Furthermore, in order to reduce the weight and cost of the lever member, the lever member is formed by bending a metal plate.

In order to rotatably support the lever member made of metal plate material on the rotating shaft, the cantilevered rotating shaft is inserted into the through hole formed in the lever member so that the lever member does not come out from the rotating shaft. It needs to be configured like this. Here, if the through hole is formed after bending the lever member, the processing effort will be reflected in the cost. Therefore, when cutting out the lever member from a metal plate material, the through hole is also formed at the same time or prior to cutting out, and the cut out member is bent to form the lever member. In this case, the metal plate material is bent so that the two previously formed through holes are arranged to face each other substantially coaxially with the pair of arms. When assembling this lever rotation mechanism, the cantilevered rotation shaft is inserted from the outside of one of the through holes.

However, as is well known, the processing accuracy when forming a lever member by bending a metal plate is not so high, and therefore the coaxiality of the two through holes is not so high either. When inserting rotating shafts of the same diameter into two through holes that do not have high coaxiality, it is necessary to make the inner diameter of at least one of the through holes larger than the outer diameter of the rotating shaft in order to absorb errors in coaxiality. If the through hole has an inner diameter larger than the outer diameter of the rotating shaft, a gap will be created between the hole and the rotating shaft. In addition, the rotating shaft is not inserted into the other through hole on the opposite side of the one through hole, and an individual shaft member, such as the threaded shaft of a bolt member, is inserted into the through hole to support the lever member. It is also conceivable to do so (in which case the individual shaft members are connected to a rotating shaft). However, even in that case, a gap is required between one of the through holes and the rotating shaft, or between the other through hole and the individual shaft members, in order to absorb errors in coaxiality. . Therefore, in either case, it is difficult to support the lever member in a stable and rotatable manner simply by inserting the rotating shaft or the individual shaft members through the two through holes.

The present invention has been made in view of the above-mentioned problems, and its object is to provide an inkjet jet capable of stably and rotatably supporting a lever member made of a metal plate material with respect to a cantilevered rotating shaft. An object of the present invention is to provide a lever rotation mechanism used for changing the position of an ink head of a printer.

In order to achieve the above object, the lever rotation mechanism of the present invention is used when changing the position of an ink head of an inkjet printer, and is supported by a support part, and the lever rotation mechanism is supported by a support part in an axial direction. A rotating shaft having one end supported in a cantilever manner, a pair of arms connected to each other, and two through holes formed through the pair of arms so as to be disposed opposite to each other, one of the through holes. between a lever member that is inserted into the rotating shaft and rotatably supported by the rotating shaft, and the arm portion in which the through hole is formed in one of the pair of arm portions, and the supporting portion. a biasing means installed at the other end of the rotating shaft in the axial direction to bias the lever member toward the other end in the axial direction of the rotating shaft; In a state where the member is biased toward the other end in the axial direction of the rotating shaft, the other of the pair of arm portions in which the through hole is formed comes into contact with the other arm portion to prevent the member from being removed from the rotating shaft. A retaining member that prevents the lever member from coming off, a contact surface that abuts the retaining member, and an outer diameter smaller than the inner diameter of the other through hole, and the position in the radial direction can be adjusted. a cylindrical bush configured to be inserted into the other through hole, and the retaining member is attached to the other end in the axial direction of the rotating shaft, so that the contact surface The radial position of the bush is adjusted so that it extends substantially perpendicular to the axis, and the one through hole and the other through hole are adjusted substantially coaxially.

According to this configuration, even if the coaxiality of the two through holes formed in the pair of arms of the lever member formed by bending a metal plate is low, the lever member and the retaining member are biased. Since the lever members are pressed and defined by the mutual contact surfaces by the means, the posture of the lever member is stabilized. The posture of this lever member is stable even when the lever member is rotated around the axis of rotation by extending the contact surfaces of both the lever member and the retaining member in a direction substantially perpendicular to the axis of the rotation axis. are doing. Therefore, the lever member made of a metal plate can be stably and rotatably supported even on the cantilevered rotating shaft.

As described above, according to the present invention, the lever member made of a metal plate can be stably and rotatably supported with respect to the cantilevered rotating shaft, and therefore the ink head of a large inkjet printer can be used. It becomes possible to manually change the position of the machine at low cost and stably.

1 is a perspective view showing a schematic configuration of a carriage of a UV inkjet printer to which a lever rotation mechanism of the present invention is applied. FIG. 2 is an explanatory diagram of a carriage operating section using the lever rotation mechanism of FIG. 1; FIG. 3 is an explanatory diagram of the action of the actuating section in FIG. 2; FIG. 3 is an explanatory diagram of the action of the actuating section in FIG. 2; FIG. 3 is an explanatory diagram of the action of the actuating section in FIG. 2; FIG. 2 is a detailed view of the lever rotation mechanism of FIG. 1; FIG. 7 is a sectional view of the lever rotation mechanism of FIG. 6;

EMBODIMENT OF THE INVENTION Below, one embodiment of the lever rotation mechanism of this invention will be described in detail with reference to drawings. FIG. 1 is a perspective view showing a schematic configuration of a carriage 1 of a UV inkjet printer to which the lever rotation mechanism of this embodiment is applied. As is well known, in this UV inkjet printer, ink that is cured by UV (ultraviolet light) is ejected onto a medium (print medium) (not shown), and then the ink is irradiated with UV to be cured. The medium is conveyed to one side in the sub-scanning direction (from the back to the front in FIG. 1) on a platen (bed) (not shown) below the carriage 1 in FIG. Printing is performed by ejecting ink onto the media while reciprocating in the direction (left and right in FIG. 1). A linear guide (not shown) is attached to the rear side of the holding member 10 that constitutes the main body of the carriage 1 in FIG. It reciprocates smoothly in the left-right direction in FIG. A motor (not shown) is used as a drive source for moving the carriage.

A mounting member 11 made of bent and assembled metal plates is provided on the front side of the holding member 10 in FIG. 1, and the ink head 2 is mounted on this mounting member 11. From the ink head 2 of this embodiment, the above-mentioned UV curable ink is ejected downward in FIG. Furthermore, UV units 3L and 3R are attached to the holding member 10 at a predetermined interval on both the left and right sides of the mounting member 11 in FIG. 1 on which the ink head 2 is mounted, respectively. These UV units 3L and 3R irradiate UV in the downward direction in FIG. 1, that is, toward the media side. That is, the carriage 1 reciprocates in the left and right directions in FIG. , the ink ejected onto the media is cured.

As mentioned above, the thickness of the media to be printed varies, and depending on the thickness of the media, the vertical position of the ink head 2 must be adjusted to adjust the distance between the ink head 2 and the media within an appropriate range. Adjustments may be made. In this embodiment, instead of using a motor-driven ink head position changing mechanism as described in Patent Document 1, the user manually changes the position of the ink head 2, specifically, the height in three stages. A mechanism is provided to enable this. FIG. 2 is an explanatory diagram of the operating section of this ink head position changing mechanism. As is clear from FIG. 2, the holding member 10 is formed by bending a metal plate, and extends in the vertical and horizontal directions in FIG. In FIG. 1, a mounting member 12 made of a metal plate is attached to extend horizontally above this plate-shaped holding member 10, and an electronic board (not shown) or the like is mounted above the mounting member 12. The UV units 3L and 3R are attached to the holding member 10 via bracket members 13L and 13R formed by bending metal plates.

A substrate member 14, which serves as the base of the mounting member 11, is disposed at the center of the front surface of the holding member 10 in FIG. This substrate member 14 is suspended from the holding member 10 via two coil springs 15 provided on the left and right sides of FIG. 2, and is urged upward in FIG. 2 by the urging force of the coil springs 15. Above the base plate member 14 and on both left and right sides of the coil spring 15 in FIG. 2, plate-shaped cam support portions 16 extending in the vertical direction in FIG. A cam shaft 17 is inserted between the cam support portions 16. Further, below the camshaft 17 and inside each of the two cam support parts 16, there are cam contact parts 19 extending in the left-right and horizontal directions in FIG. It is protruded towards the front. Cam members 18 provided on both left and right sides of the camshaft 17 in FIG. The cam member 18 has three cam surfaces 18a to 18c adjacent to each other that are flat in the circumferential direction of the cam shaft 17, as will be described in detail later.

The cam shaft 17 protrudes to the left in the drawing from the cam support portion 16 on the left side of FIG. 2, and a connecting plate member 20 is attached to the protrusion. The connecting plate member 20 protrudes in the radial direction of the camshaft 17, and a connecting rod member 21 is rotatably attached to the protruding tip via a connecting pin 22. The connecting rod member 21 is formed by bending a metal plate, and is disposed diagonally downward toward the front while shifting to the left in the figure. The lower front end of the connecting rod member 21 is rotatably connected to a lever member 24 via a connecting pin 23, as shown in FIG. 3, for example. As described later, this lever member 24 is formed by bending a metal plate material, and is rotatably supported by inserting a rotating shaft 25 into a through hole 27 and a through hole 28 (see FIG. 7). . The rotating shaft 25 projects horizontally from a bracket member (supporting portion) 13L for attaching the UV unit 3L on the left side of FIG. 1 to the holding member 10, and is cantilevered by the bracket member 13L. As shown in FIG. 3, this rotating shaft 25 is shifted, for example, to the right in FIG. 3 with respect to the connecting pin 23 for connecting the connecting rod member 21 to the lever member 24. A link mechanism is formed by the distance 23, the distance between the connecting pin 23 and the connecting pin 22, and the distance between the connecting pin 22 and the camshaft 17. Note that a cover member 26 made of, for example, resin is fitted and attached to the front portion of the lever member 24 in FIG. 3, that is, the portion (operation portion) that the user touches with his fingers.

3 to 5 are explanatory diagrams of the operation of the actuating section in FIG. 2, and correspond to side views seen from the left side of FIG. 2. In FIG. 3, the lever member 24 is oriented forward and downward, and in this state, among the cam members 18, the first cam surface 18a, which has the longest distance from the axis of the cam shaft 17 (axis center in the figure) to the cam surface. is in contact with the upper surface of the cam contact portion 19 in FIG. As mentioned above, the substrate member 14 is urged upward in the figure by the coil spring 15, but the cam contact portion 19 is pushed down by the first cam surface 18a against this urging force, and the substrate member 14 is thereby pushed down by the first cam surface 18a. 14 is located at the lowest position. Since the ink head 2 is attached to the substrate member 14 via the mounting member 11, in this state, the ink head 2 is disposed at the lowest, lowest position.

FIG. 4 shows, for example, a state in which the lever member 24 has been rotated upward by about 45 degrees from the state shown in FIG. 3, and the lever member 24 is oriented diagonally upward and forward. For example, from the state shown in FIG. 3, the camshaft 17 is rotated clockwise in the figure by the link mechanism composed of the lever member 24, the connecting rod member 21, and the connecting plate member 20, and as a result, as shown in FIG. Of the cam members 18, the second cam surface 18b having the second largest distance from the axis of the cam shaft 17 to the cam surface is in contact with the upper surface of the cam contact portion 19 in FIG. Since the base plate member 14 is urged upward in the figure by the coil spring 15, the contact position of the cam contact portion 19 is shifted from the axis of the camshaft 17 between the second cam surface 18b and the first cam surface 18a. When the substrate member 14 approaches the axis of the camshaft 17 by the difference in distance, the substrate member 14 rises by that amount. Therefore, the ink head 2 attached to the substrate member 14 via the mounting member 11 rises to the center position, which is higher than the lowest position in FIG.

FIG. 5 shows, for example, a state in which the lever member 24 is further rotated upward by approximately 45 degrees from the state shown in FIG. 4, and the lever member 24 is oriented substantially upward. For example, from the state shown in FIG. 4, the camshaft 17 is further rotated clockwise in the figure by the link mechanism composed of the lever member 24, the connecting rod member 21, and the connecting plate member 20, and as a result, as shown in FIG. Among the cam members 18, the third cam surface 18c having the smallest distance from the axis of the camshaft 17 to the cam surface is in contact with the upper surface of the cam contact portion 19 in FIG. Since the base plate member 14 is urged upward in the drawing by the coil spring 15, the contact position of the cam contact portion 19 is shifted from the axis of the camshaft 17 between the third cam surface 18c and the second cam surface 18b. When the substrate member 14 approaches the axis of the camshaft 17 by the difference in distance, the substrate member 14 rises by that amount. Therefore, the ink head 2 attached to the substrate member 14 via the mounting member 11 rises to a high position higher than the center position in FIG.

In the above, the case where the position of the ink head 2 is changed by moving the ink head 2 from the lowest position in FIG. 3 to the higher position in FIGS. 4 and 5 in that order has been described. 4. It is also possible to change the position by moving the ink head 2 to a lower position in the order of FIG. It is also possible to move the ink head 2 only between the position shown in FIG. 3 and the position shown in FIG. 4, or to move the ink head 2 only between the position shown in FIG. 4 and the position shown in FIG. .

The lever rotation mechanism of this embodiment is applied to a portion that rotatably supports the lever member 24 with respect to the rotating shaft 25. FIG. 6 is a detailed view of this lever rotation mechanism, and FIG. 7 is a sectional view of FIG. 6. In FIGS. 6 and 7, illustration of the connecting rod member 21 is omitted. As mentioned above, the lever member 24 used in this lever rotation mechanism is formed by bending a metal plate. Specifically, as shown in FIG. 6, a flat plate portion 29 is formed that extends downward in FIG. 6 continuously from the operating portion inserted into the cover member 26. The left side portion in FIG. 6 is bent substantially perpendicularly toward the back of the page to form a connecting portion (arm portion) 31 extending in the shape of a flat plate toward the back of the page. The connecting rod member 21 is connected to the center of this connecting portion 31. Further, a notch 30 is formed in the lower part of the flat plate part 29 in FIG. 6, and the lower part of the figure in FIG. Through holes 27 and 28 are formed in the regulation part 32 and the connection part 31, respectively, when or before the lever member 24 is cut out from a metal plate. Most rationally, these two through holes 27 and 28 are formed at the same time, for example, by press working, when the lever member 24 is cut out from a metal plate. Note that the two through holes 27 and 28 in this embodiment have different inner diameters, as will be described later. Specifically, the inner diameter of the through hole (the other through hole) 27 of the defining portion 32 is smaller than the inner diameter of the through hole (the other through hole) 28 of the connecting portion 31 .

On the other hand, for the rotating shaft 25, a well-known self-clinching spacer was used. As mentioned above, the support part that cantilevers the rotating shaft 25, that is, the support part that supports the lever rotation mechanism, is the bracket member 13L made of a metal plate, so a cylindrical body is formed on the metal plate by so-called sheet metal processing. A self-clinching spacer that can be easily erected is driven into the back side of a metal plate material, for example, to form the rotating shaft 25. Many self-clinching spacers have a screw hole formed in the protruding tip end in the axial direction. In this embodiment, a self-clinching spacer having a screw hole 33 formed at its protruding tip is used, and the rotating shaft 25 made of the self-clinching spacer is inserted from the outside of the through hole 28 of the connecting portion 31 of the lever member 24. If the bolt member 34 (of The head 36) serves as a retaining member for preventing the lever member 24 from coming off. That is, in a state in which the lever member 24 moves in the direction in which it is removed from the rotating shaft 25, the outer surface of the defining portion 32 of the lever member 24 comes into contact with the seat surface 37 of the head 36 of the bolt member 34. At this time, the contact surfaces of the lever member 24 and the bolt member 34, that is, the outer plane of the regulating portion 32 of the lever member 24 and the seat surface 37 of the head 36 of the bolt member 34, are both in a direction substantially perpendicular to the axis of the rotating shaft 25. It extends to Note that the arrangement of the rotation shaft 25 is also an essential requirement for disposing a lever rotation mechanism for changing the ink head position between the mounting member 11 on which the ink head 2 is mounted and the UV unit 3L.

In this embodiment, the inner diameter of the through hole (hereinafter also referred to as the insertion side through hole) 28 of the connecting portion 31 is set slightly so that the lever member 24 (the connecting portion 31) can slide on the outer periphery of the rotating shaft 25. The inner diameter of the through hole 27 of the regulation portion 32 (hereinafter also referred to as the non-insertion side through hole) is set to be slightly larger than the outer diameter of the rotating shaft 25 in order to ensure a clearance. It is set smaller than the inner diameter. Therefore, the rotating shaft 25 is not inserted into the through hole 27 on the opposite side to the insertion side. Insert the bush 38 into the through hole 27 on the opposite insertion side with a slight clearance so that the regulation part 32 of the lever member 24 can slide on the outer periphery of the rotating shaft 25, and insert the bush 38 inside the bush 38. A threaded shaft portion 35 of the member 34 is inserted through the member 34, and the threaded shaft portion 35 is screwed into a threaded hole 33 at the protruding tip of the rotary shaft 25 for connection. The bush 38 has a cylindrical shape made of metal, for example, and has an outer diameter smaller than the inner diameter of the non-insertion side through hole 27 and an inner diameter larger than the outer diameter of the threaded shaft portion 35 of the bolt member 34. Therefore, a gap is created between the threaded shaft portion 35 of the bolt and the inner peripheral surface of the bush 38. This gap absorbs errors in coaxiality between the two through holes 27 and 28.

On the other hand, as clearly shown in FIG. 7, a coil spring 39 is interposed between the bracket member 13L, which serves as a support for the rotating shaft 25, and the lever member 24, as a biasing means. A resin hat-shaped guide bush 40 is interposed between the coil spring 39 and the lever member 24, and the flange portion 40a of the guide bush 40 is sandwiched between the coil spring 39 and the connecting portion 31 of the lever member 24. The configuration is such that Due to the biasing force of the coil spring 39, the lever member 24 and the bolt member 34 are prevented from coming off at their contact surfaces, that is, the right-hand side plane in FIG. It is pressed against the seat surface 37 of the head 36 of the bolt member 34, which is a member.

As mentioned above, when forming the lever member 24 by bending a metal plate material in which two through holes 27 and 28 are formed in advance so that the two through holes 27 and 28 are arranged coaxially, The coaxiality of the two through holes 27 and 28 in the actually completed lever member 24 is not very high. If the rotating shaft 25 with a uniform outer diameter is inserted into both of the two through holes 27 and 28 that are not highly coaxial, at least one of the through holes 27 and 28 (generally, the through holes 27 and 28 that are not highly coaxial) Unless the inner diameter of the hole 27) is made larger than the outer diameter of the rotating shaft 25, it is not possible to absorb the error in coaxiality of the two through holes 27, 28. A gap is created between the inner periphery of at least one of them (the one with the larger inner diameter, generally the through hole 27) and the outer periphery of the rotating shaft 25. If the gap is large, the assembling workability can be improved, but the backlash of the lever member 24 will be large, so the operating feeling will be inferior to when the gap is small. On the other hand, as in this embodiment, the rotating shaft 25 is inserted through the through hole 28 of the connecting portion 31, that is, the through hole 28 on the insertion side, but the through hole 27 of the regulating portion 32, that is, the through hole on the opposite side of insertion. 27, the rotating shaft 25 is not inserted through the through hole 27 on the opposite side of insertion, but an individual shaft member, that is, the threaded shaft portion 35 of the bolt member 34 is inserted into the through hole 27, and the cylindrical bush 38 is fitted into the threaded shaft portion 35. In this way, a bush 38 whose position can be adjusted in the radial direction of the shaft is interposed between the through hole 27 on the opposite insertion side and the screw shaft portion 35. The bush 38 is fitted onto the outer circumferential surface of the screw shaft portion 35, and the screw shaft portion 35 is inserted into the through hole 27 on the opposite insertion side. In this case, due to the biasing force of the coil spring 39, the flat surface on the right side in FIG. It will be done. Since the seat surface 37 of the bolt member 34 is formed perpendicularly to the axis of the rotating shaft 25, centering of the bush 38 is performed by setting the contact surface of the bush 38 in a perpendicular direction. . Thereby, the centering of the non-insertion side through hole 27 is performed and it is set coaxially with the insertion side through hole 28, so that play can be prevented from occurring. Even if there is variation between the insertion side through hole 28 and the non-insertion side through hole 27, the centering of the bush 38 is performed by the biasing force of the coil spring 39 and the seat surface 37 of the bolt member 34 as described above. Since it is assembled by tightening the bolt member 34 in a centered state, the assembly is easy. Note that the bush 38 is set to be longer than the length of the non-insertion side through hole 27 in the axial direction so that the defining portion 32 of the lever member 24 can rotate.

In the lever member 24 itself, the outer surface of the regulating portion 32 in which the opposite-side through hole 27 is formed is pressed against the seat surface 37 of the head 36 of the bolt member 34, thereby regulating the posture of the lever member 24. The inner diameter of the through hole 28 on the insertion side is approximately equal to the outer diameter of the rotating shaft 25, and the outer plane of the regulating portion 32 of the lever member 24 and the seat surface 37 of the head 36 of the bolt member 34 are both aligned with the axis of the rotating shaft 25. Since the lever member 24 extends in the right angle direction, the posture of the lever member 24 continues to be defined even during the rotational operation of the lever member 24, so that the rotational operation of the lever member 24 is stabilized. As described above, in the lever rotation mechanism of this embodiment, the lever member 24 made of a metal plate can be supported rotatably in a stable state with respect to the cantilevered rotation shaft 25, so that it can be used in large inkjet printers. It becomes possible to manually change the position of the ink head 2 at low cost and stably.

In this way, in the lever rotation mechanism of this embodiment, even if the two through holes 27 and 28 of the lever member 24 formed by bending a metal plate have low coaxiality, the lever member 24 can be rotated. Since the outer plane of the regulating portion 32 is pressed against the seat surface 37 of the head 36 of the bolt member 34 by the coil spring 39 serving as the urging means, the posture of the lever member 24 is stabilized. This attitude of the lever member 24 is such that even when the lever member 24 is rotated around the rotating shaft 25, the outer plane of the regulating portion 32 of the lever member 24 and the seat surface 37 of the head 36 of the bolt member 34 are both aligned. Since it extends substantially perpendicular to the axis of the rotating shaft 25, it is always stable. Therefore, even with respect to the cantilevered rotating shaft 25, the lever member 24 made of a metal plate can be stably and rotatably supported.

Furthermore, by making the inner diameter of the insertion side through hole 28 substantially equal to the outer diameter of the rotating shaft 25, the rotating shaft 25 is tightly fitted into the insertion side through hole 28 which is spaced apart from the contact surface of the lever member 24 and the bolt member 34. Since the lever member 24 is inserted into the shaft, the inner circumferential surface of the insertion side through hole 28 slides against the outer circumferential surface of the rotating shaft 25 even when the lever member 24 is being rotated, and the lever member 24 is guided. The posture of the lever member 24 is stabilized.

Further, among the two through holes 27 and 28 of the lever member 24, the rotating shaft 25 is not inserted into the through hole 27 on the opposite side to the insertion side, and the threaded shaft portion 35 of the bolt member 34 is inserted into the through hole 27. Then, the bush 38 is interposed between the through hole 27 on the side opposite to insertion and the screw shaft 35 so that the cylindrical bush 38 is fitted onto the screw shaft 35 . At this time, by making the inner diameter of the bush 38 larger than the outer diameter of the threaded shaft portion 35, a gap is created between the inner peripheral surface of the bush 38 and the threaded shaft portion 35, and this gap allows the two through holes 27, 28 coaxiality errors can be absorbed.

Further, a bolt member 34 is used as a retaining member for preventing the lever member 24 from coming off, and the threaded shaft portion 35 of the bolt member 34 is screwed into the screw hole 33 formed at the protruding tip portion of the rotating shaft 25. The present invention is achieved by connecting the two, and by configuring the outer plane of the regulating portion 32 of the lever member 24 to be in contact with the abutting surface consisting of the seat surface 37 of the head 36 of the bolt member 34 as the abutting surface. The lever rotation mechanism can be constructed simply and inexpensively.

Further, by using the coil spring 39 as the biasing means and fitting it onto the outer circumferential side of the rotating shaft 25, for example, a structure for supporting the biasing means is not required, and the lever rotation mechanism of the present invention can be constructed simply and inexpensively.

Although the lever rotation mechanism according to the embodiment has been described above, the present invention is not limited to the configuration described in the above embodiment, and various changes can be made within the scope of the gist of the present invention. For example, in the embodiment described above, the rotating shaft 25 to which the lever member 24 is attached is formed of a self-clinching spacer, but a normal shaft member may be used. Similarly, the support part from which the rotating shaft 25 is protruded is not limited to the bracket member 13L for connecting the UV unit 3L, but the rotating shaft 25 can be provided upright on any member.

Further, the lever rotation mechanism of the present invention can be similarly applied not only to UV inkjet printers but also to inkjet printers that use ink other than UV curing type.

1 Carriage 2 Ink head 3L, 3R UV unit 24 Lever member 25 Rotating shaft 27 Through hole (insertion side through hole)
28 Through hole (through hole on opposite insertion side)
31 Connecting part (arm part)
32 Specified part (arm part)
33 Screw hole 34 Bolt member (retaining member)
35 Screw shaft portion 36 Head 37 Seat surface 38 Bush 39 Coil spring (biasing means)

Claims (6)

A lever rotation mechanism supported by a support part and used when changing the position of an ink head of an inkjet printer,
a rotating shaft whose one end in the axial direction is cantilever-supported by the support part;
It has a pair of arm parts that are connected to each other, and two through holes that are formed through the pair of arm parts so as to be opposed to each other. a lever member rotatably supported;
Of the pair of arm parts, the lever member is disposed between the arm part in which the through hole is formed and the support part, and the lever member is attached to the other end side in the axial direction of the rotating shaft. a biasing means for biasing the
attached to the other end in the axial direction of the rotating shaft, and in a state where the lever member is biased toward the other end in the axial direction of the rotating shaft by the urging means; a retaining member that comes into contact with the arm portion in which the other through hole is formed to prevent the lever member from coming off from the rotating shaft;
a cylinder having a contact surface that abuts the retaining member and an outer diameter smaller than the inner diameter of the other through hole, configured to be able to adjust its position in the radial direction, and inserted into the other through hole; comprising a shaped bush;
By attaching the retaining member to the other end in the axial direction of the rotating shaft, the position of the bushing in the radial direction is adjusted such that the contact surface extends in a direction substantially perpendicular to the rotating shaft. . A lever rotation mechanism, wherein the one through hole and the other through hole are adjusted substantially coaxially. 2. The lever rotation mechanism according to claim 1, wherein an inner diameter of said one through hole is substantially equal to an outer diameter of said rotating shaft. The retaining member and the rotating shaft are connected by a screw, and a screw shaft portion formed on either the retaining member or the rotating shaft is inserted into the through hole of the other, and 3. The lever rotation mechanism according to claim 1, wherein the bush is interposed between the hole and the screw shaft. 4. The lever rotation mechanism according to claim 3, wherein the inner diameter of the bush is larger than the outer diameter of the screw shaft. The retaining member is a bolt member, and a threaded shaft portion of the bolt member is inserted into the other through hole and screwed into a threaded hole formed in the protruding end of the rotating shaft to connect the two; A flat surface of the arm portion on the side of the retaining member in which the other through hole is formed is brought into contact with a contact surface consisting of a head seat surface of the bolt member as a contact surface. The lever rotation mechanism according to item 3 or 4. 6. The lever rotation mechanism according to claim 1, wherein the biasing means is a coil spring fitted on the outer circumferential side of the rotation shaft.

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