Printing device
Patent Information
- Application Number
- JP2023136012
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-08-24
- Publication Date
- 2025-03-07
Smart Images
Figure 2025030582000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a printing device. [Background technology]
[0002] Patent Document 1 discloses a printing device that moves a gantry that holds a recording head. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent Publication No. 2021-66045 Summary of the Invention [Problem to be solved by the invention]
[0004] In the printing device disclosed in Patent Document 1, in order to stabilize the movement of the moving part, it is preferable to apply a driving force to two or more points on the moving part. However, when the driving force is applied to two or more points on the moving part, there is a problem that the driving force acting on the moving part is biased. [Means for solving the problem]
[0005] One aspect of the present disclosure is a printing device comprising: a medium support section that supports a printing medium; a printing section that prints on the printing medium; a moving mechanism that supports the printing section and is configured to be movable in a first direction relative to the medium support section; and a drive mechanism that moves the moving mechanism in the first direction, wherein the moving mechanism has a first guide shaft that is provided on one side of the medium support section in a second direction intersecting the first direction and extends in the first direction, a second guide shaft that is provided on the other side of the medium support section in the second direction and extends in the first direction, a first leg that is movably supported on the first guide shaft, and a second leg that is movably supported on the second guide shaft, wherein the drive mechanism has a drive source and a transmission structure that transmits a driving force generated by the drive source to the first leg and the second leg, and the drive source is disposed between the first guide shaft and the second guide shaft in the second direction and drives the first leg and the second leg in the first direction. [Brief description of the drawings]
[0006] [Figure 1] FIG. 1 is a plan view showing an example of the overall configuration of a printing apparatus according to an embodiment. [Diagram 2] FIG. 4 is a perspective view showing an example of the configuration of a drive mechanism. [Diagram 3] FIG. 2 is a plan view showing an example of the configuration of a moving mechanism and a driving mechanism. [Figure 4] FIG. 4 is a perspective view showing an example of the configuration of a leg portion. [Diagram 5] FIG. 11 is a perspective view showing an example of the configuration of a fixing member that fixes the leg portion to the second belt. [Figure 6] FIG. 4 is a perspective view showing an example of an adjustment mechanism for adjusting the tension of a first belt. [Figure 7] FIG. 4 is a perspective view showing an example of an adjustment mechanism for adjusting the tension of a second belt. [Figure 8] FIG. 13 is a perspective view showing an example of a detector that detects the origin position of the first leg in the front-rear direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0007] [1. Overall composition] FIG. 1 is a plan view showing an example of the overall configuration of a printing device 1 according to this embodiment. 1, the printing device 1 includes a recording head 89a and a medium support unit 30. The medium support unit 30 supports a printing medium M. The recording head 89a forms an image on the printing medium M by ejecting liquid such as ink. In other words, the printing device 1 is a device that forms an image on the printing medium M by ejecting liquid from the recording head 89a. The print medium M is a sheet, a cloth, or a three-dimensional object. The sheet may be a paper or synthetic resin sheet. The cloth may be any of nonwoven fabric, knitted fabric, and woven fabric. The three-dimensional object includes accessories such as clothes and shoes, daily necessities, machine parts, and various other objects. There is no limitation on the type of liquid that the printing device 1 ejects onto the printing medium M, as long as it has fluidity. For example, the printing device 1 is a printer that ejects ink of one or more colors onto the surface of the printing medium M using a recording head 89a to form an image on the printing medium M.
[0008] Each of Figs. 1 to 8 shows an X-axis, a Y-axis, and a Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The Z-axis is an axis that extends in the up-down direction. The X-axis and Y-axis are parallel to a horizontal plane. In the following description, the direction along the X-axis is the left-right direction, and the direction along the Y-axis is the front-rear direction. In detail, the positive direction of the Z-axis is the upward direction, the positive direction of the X-axis is the leftward direction, and the positive direction of the Y-axis is the forward direction. The front-rear direction corresponds to an example of a "first direction." The left-right direction corresponds to an example of a "second direction." The second direction is a direction intersecting with the first direction. In this embodiment, a case will be described in which the second direction is a direction perpendicular to the first direction.
[0009] The printing device 1 includes a bottom plate 13, a pair of base members 15, a pair of guide shafts 51, and a medium support unit 30. The base member 15 is a member extending in the left-right direction. The two base members 15 are arranged side by side in the front-rear direction on the bottom plate 13 and fixed to the bottom plate 13. The guide shaft 51 is a shaft extending in the front-rear direction, and each of the two guide shafts 51 is arranged side by side in the left-right direction so as to straddle the two base members 15.
[0010] The guide shaft 51 is composed of a first guide shaft 51A and a second guide shaft 51B. The first guide shaft 51A is provided on the right side of the medium support unit 30 in the left-right direction and extends in the front-rear direction. The second guide shaft 51B is provided on the left side of the medium support unit 30 in the left-right direction and extends in the front-rear direction. The right side corresponds to an example of "one side." The left side corresponds to an example of the "other side." The guide shaft 51 will be further described with reference to FIGS.
[0011] The medium support unit 30 supports the printing medium M. The medium support unit 30 includes a table 31 and a height movement mechanism 32. The table 31 is disposed at a position surrounded by a pair of base members 15 and a pair of guide shafts 51 in the front-rear and left-right directions. The table 31 has a support surface 31m. The support surface 31m is a rectangular surface that is parallel to the XY plane and faces upward. The support surface 31m supports the printing medium M placed on the support surface 31m.
[0012] The table 31 also includes protrusions 31n that protrude outward from the support surface 31m in a plan view at the lower portions of the four corners of the support surface 31m. The protrusions 31n are fixed to a lifting mechanism 39, which will be described later, so that the table 31 is supported so as to be movable up and down relative to the base member 15.
[0013] The height movement mechanism 32 is a mechanism that raises and lowers the support surface 31m and the printing medium M supported on the support surface 31m by raising and lowering the table 31 up and down. The height movement mechanism 32 includes a lifting motor 33, a lifting belt 37, and a lifting mechanism 39. The lifting mechanism 39 has a ball screw arranged along the vertical direction, a nut that screws into the ball screw, and a pulley. The ball screw of the lifting mechanism 39 is rotatably supported by the base member 15. The nut of the lifting mechanism 39 is fixed to the protrusion 31n of the table 31. The pulley of the lifting mechanism 39 is fixed to an upper part of the ball screw. When the pulley of the lifting mechanism 39 rotates, the ball screw rotates, and the protrusion 31n moves along the vertical direction together with the nut as the ball screw rotates.
[0014] The lift motor 33 is a motor that rotates under the control of a control unit (not shown). The control unit controls the direction and amount of rotation of the lift motor 33. The lift belt 37 is a circular belt that is stretched around the output shaft of the lift motor 33 and the pulleys of the four lift mechanisms 39. The lift belt 37 is driven in a circular motion as the lift motor 33 rotates. The lift belt 37 transmits the rotation of the lift motor 33 to the four pulleys of the lift mechanism 39. This causes the ball screw of the lift mechanism 39 to rotate, moving the table 31 up and down.
[0015] The rotation direction of the lift motor 33 can be switched between a forward direction for moving the table 31 upward and a reverse direction for moving the table 31 downward. The printing device 1 raises and lowers the table 31 by operating the lift motor 33.
[0016] The carriage 89 is a substantially rectangular box, and is supported by the main frame 71 via a carriage guide shaft 83. The carriage guide shaft 83 is a shaft-shaped member fixed to the main frame 71, and extends in the left-right direction along the main frame 71. Both left-right ends of the main frame 71 are supported by a pair of legs 73 of the movement mechanism 70. The moving mechanism 70 will be described with reference to FIGS. The carriage guide shaft 83 supports the carriage 89 so as to be movable in the left-right direction. The lower end of the carriage 89 is located above the position of the support surface 31m when the table 31 is located at the uppermost position. Therefore, the carriage 89 moves in the front-rear and left-right directions above the support surface 31m without interfering with the support surface 31m.
[0017] Furthermore, the carriage 89 is connected to a carriage drive belt 85. The carriage drive belt 85 is a circular belt that is disposed along the carriage guide shaft 83, with one end hung around a carriage drive pulley 86 and the other end hung around the output shaft of a carriage drive motor 87. The carriage drive pulley 86 is a pulley that is rotatably fixed to the right end of the main frame 71. The carriage drive motor 87 is a motor that is fixed to the left end of the main frame 71, and rotates its output shaft under the control of a control unit (not shown). The carriage drive motor 87 rotates the output shaft to circulate the carriage drive belt 85. As a result, the carriage drive motor 87 moves the carriage 89 connected to the carriage drive belt 85 in the left-right direction along the carriage guide shaft 83.
[0018] The carriage 89 includes a recording head 89a and an irradiation unit 89b. The recording head 89a has a plurality of nozzles (not shown) that open downward from the lower end surface of the carriage 89. The recording head 89a ejects liquid from these nozzles by driving a piezoelectric actuator (not shown). When the recording head 89a ejects liquid from the nozzles, the ejected liquid flies between the nozzles and the printing medium M placed on the table 31, and lands on the printing medium M. In this embodiment, the liquid ejected from the nozzles by the recording head 89a is ink that is cured by ultraviolet light. The recording head 89a forms characters and images made of the liquid on the printing medium M supported by the medium support unit 30 by causing the liquid to land on the printing medium M. The recording head 89a corresponds to an example of a "printing unit."
[0019] The irradiation unit 89b has an irradiation window (not shown) facing downward from the lower end surface of the carriage 89. The irradiation window is composed of a plate-shaped member made of a light-transmitting material. The irradiation unit 89b emits irradiation light from a light source unit (not shown) through the irradiation window. The irradiation light emitted from the irradiation unit 89b passes between the irradiation window and the printing medium M placed on the table 31, and is irradiated onto the printing medium M recorded by the recording head 89a. In this embodiment, the irradiation unit 89b is equipped with a UV-LED (Ultraviolet Light Emitting Diode) that emits ultraviolet light, and the irradiated light is ultraviolet light. That is, in this embodiment, the irradiation unit 89b irradiates ultraviolet light onto ink that has landed on the printing medium M and is cured by ultraviolet light, thereby fixing the ink to the printing medium M.
[0020] [2. Configuration of the moving mechanism and the driving mechanism] Next, the configurations of the moving mechanism 70 and the drive mechanism 50 will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a perspective view showing an example of the drive mechanism 50. Fig. 2 is a plan view showing an example of the configurations of the moving mechanism 70 and the drive mechanism 50. 1, the moving mechanism 70 supports the carriage 89 and is configured to be movable in the front-rear direction relative to the medium support section 30. The driving mechanism 50 moves the moving mechanism 70 in the front-rear direction. The movement mechanism 70 is made up of a first movement mechanism 70A and a second movement mechanism 70B. The second movement mechanism 70B and the first movement mechanism 70A are configured identically to each other.
[0021] The first movement mechanism 70A includes a first guide shaft 51A, a first leg 73A, and a first frame 75A. The second movement mechanism 70B includes a second guide shaft 51B, a second leg 73B, and a second frame 75B. The first guide shaft 51A is provided on the right side of the medium support unit 30 in the left-right direction and is a cylindrical shaft extending in the front-rear direction. The first guide shaft 51A supports the first leg 73A movably in the front-rear direction. The second guide shaft 51B is provided on the left side of the medium support unit 30 in the left-right direction and is a cylindrical shaft extending in the front-rear direction. The second guide shaft 51B supports the second leg 73B movably in the front-rear direction. The second guide shaft 51B is configured in the same manner as the first guide shaft 51A. That is, the material of the second guide shaft 51B is the same as the material of the first guide shaft 51A. The diameter of the second guide shaft 51B is formed to be the same as the diameter of the first guide shaft 51A. The length of the second guide shaft 51B is formed to be the same as the length of the first guide shaft 51A. The second guide shaft 51B is also disposed along the front-rear direction, similar to the first guide shaft 51A. The first guide shaft 51A and the second guide shaft 51B correspond to a pair of guide shafts 51.
[0022] The first leg 73A supports the right end of the main frame 71 shown in Fig. 1. The first leg 73A is supported by the first guide shaft 51A so as to be movable in the front-rear direction. The first leg 73A is moved in the front-rear direction on the first guide shaft 51A by the drive mechanism 50. The second leg 73B supports the left end of the main frame 71 shown in Fig. 1. The second leg 73B is supported by the second guide shaft 51B so as to be movable in the front-rear direction. The second leg 73B is moved in the front-rear direction on the second guide shaft 51B by the drive mechanism 50. The second leg 73B is configured in the same manner as the first leg 73A. That is, the shape of the second leg 73B is formed in the same manner as the shape of the first leg 73A. The size of the second leg 73B is formed in the same manner as the size of the first leg 73A. Similarly to the first leg 73A, the second leg 73B is disposed in the front-rear direction and the up-down direction, in other words, along the YZ plane. The first leg portion 73A and the second leg portion 73B correspond to a pair of legs 73. The configuration of the legs 73 will be further explained with reference to FIG.
[0023] The first frame 75A houses the first guide shaft 51A and the first leg 73A. The first frame 75A extends in the front-rear direction. The first frame 75A is configured to be substantially U-shaped in a front view from the front to the rear, with a bottom member 751A and two side members 752A and 753A. The first guide shaft 51A is fixed to the bottom surface of the first frame 75A. The second frame 75B houses the second guide shaft 51B and the second leg 73B. The second frame 75B extends in the front-rear direction. The second frame 75B is configured to be substantially U-shaped in a front view from the front to the rear, with a bottom member 751B and two side members 752B, 753B. The second guide shaft 51B is fixed to the bottom surface of the second frame 75B. The second frame body 75B is configured identically to the first frame body 75A. The first frame body 75A and the second frame body 75B correspond to a pair of frames 75. The base members 751A, 751B and the side members 752A, 753A, 752B, 753B are further described with reference to FIG.
[0024] The driving mechanism 50 moves the first leg 73A along the first guide shaft 51A, and moves the second leg 73B along the second guide shaft 51B. The drive mechanism 50 includes a leg drive motor 61 and a transmission structure 60 that transmits the drive force generated by the leg drive motor 61 to the first leg 73A and the second leg 73B.
[0025] The leg driving motor 61 is disposed at a position corresponding to the front end of the first guide shaft 51A and the second guide shaft 51B in the front-rear direction. The leg driving motor 61 is disposed between the first guide shaft 51A and the second guide shaft 51B in the left-right direction. The leg driving motor 61 is preferably disposed, for example, at a substantially central position between the first guide shaft 51A and the second guide shaft 51B in the left-right direction. The leg driving motor 61 is more preferably disposed, for example, at a central position between the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B in the left-right direction. The first belt 63A and the first belt 63B will be described later with reference to FIG. 2 and FIG. 3. The leg drive motor 61 drives the first leg 73A and the second leg 73B in the forward and backward directions via the transmission structure 60 by rotating the output shaft of the leg drive motor 61 in accordance with instructions from a control unit (not shown). The leg drive motor 61 corresponds to an example of a "drive source."
[0026] In this way, since the leg driving motor 61 is disposed between the first guide shaft 51A and the second guide shaft 51B in the left-right direction, it is possible to suppress the occurrence of a difference between the driving force transmitted to the first transmission structure 60A and the driving force transmitted to the second transmission structure 60B. For example, when the leg driving motor 61 is disposed in the center position between the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B in the left-right direction, it is possible to make the driving force transmitted to the first transmission structure 60A and the driving force transmitted to the second transmission structure 60B coincide with each other. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0027] The transmission structure 60 has a drive shaft 62, a first transmission structure 60A, and a second transmission structure 60B. The drive shaft 62 is rotated via the output shaft of the leg drive motor 61 and a gear train 61A. The gear train 61A is composed of a plurality of gears meshing with each other. When the gear train 61A is composed of, for example, two gears, one gear is integral with the output shaft of the leg drive motor 61, and the other gear is integral with the drive shaft 62. The driving force of the output shaft of the leg drive motor 61 is transmitted from the output shaft of the leg drive motor 61 to one gear, then from the one gear to the other gear that meshes with the one gear, and then from the other gear to the drive shaft 62 that is integral with the other gear.
[0028] The drive shaft 62 is a columnar or cylindrical shaft extending in the left-right direction. A pair of first gears 621 is fixed to both left-right ends of the drive shaft 62. The pair of first gears 621 is composed of a right first gear 621A and a left first gear 621B. The pair of first gears 621 are rotated integrally with the drive shaft 62 by a gear train 61A. The right first gear 621A is included in the first transmission structure 60A. The left first gear 621B is included in the second transmission structure 60B.
[0029] Each of the first transmission structure 60A and the second transmission structure 60B includes a first gear 621, a first belt 63, a compound gear 65, a second belt 67, and a second gear 69. When distinguishing between the first transmission structure 60A and the second transmission structure 60B, the first gear 621 of the first transmission structure 60A is described as a first gear 621A, and the first gear 621 of the second transmission structure 60B is described as a first gear 621B. When distinguishing between the first transmission structure 60A and the second transmission structure 60B, the first belt 63 of the first transmission structure 60A is described as a first belt 63A, and the first belt 63 of the second transmission structure 60B is described as a first belt 63B. When distinguishing between the first transmission structure 60A and the second transmission structure 60B, the compound gear 65 of the first transmission structure 60A is described as a compound gear 65A, and the compound gear 65 of the second transmission structure 60B is described as a compound gear 65B. Furthermore, when distinguishing between the first transmission structure 60A and the second transmission structure 60B, the second belt 67 of the first transmission structure 60A will be described as the second belt 67A, and the second belt 67 of the second transmission structure 60B will be described as the second belt 67B. Furthermore, when distinguishing between the first transmission structure 60A and the second transmission structure 60B, the second gear 69 of the first transmission structure 60A will be described as the second gear 69A, and the second gear 69 of the second transmission structure 60B will be described as the second gear 69B. The second gear 69 will be further described with reference to FIG.
[0030] The compound gear 65 is disposed above the first gear 621. The compound gear 65 is composed of a rotating shaft 651, a third gear 652, and a fourth gear 653. The rotating shaft 651 extends in the left-right direction. Both ends of the rotating shaft 651 are rotatably supported by the frame 75. The rotating shaft 651 is inserted through the center of the third gear 652 and is integral with the third gear 652. The rotating shaft 651 is also inserted through the center of the fourth gear 653 and is integral with the fourth gear 653. That is, the rotating shaft 651, the third gear 652, and the fourth gear 653 are integral with each other. The fourth gear 653 is disposed to the left of the third gear 652. The diameter of the fourth gear 653 is smaller than the diameter of the third gear 652.
[0031] The first belt 63 is a circular belt that is stretched between the first gear 621 and the third gear 652 of the compound gear 65. The driving force transmitted from the leg drive motor 61 to the first gear 621 is transmitted to the compound gear 65 by the first belt 63. The compound gear 65 is disposed such that the center in the front-to-rear direction of the third gear 652 of the compound gear 65 is located directly above the center in the front-to-rear direction of the first gear 621.
[0032] The second belt 67 is a circular belt that is stretched between the fourth gear 653 of the compound gear 65 and the second gear 69. The width of the second belt 67 is wider than the width of the first belt 63. As shown in FIG. 5, the second gear 69 is rotatably supported at the rear end of the frame 75. As shown in FIG. 5, the second belt 67 is fixed to the left side surface of the leg 73 by a fixing member 734. That is, the driving force transmitted from the leg driving motor 61 to the compound gear 65 is transmitted to the leg 73 by the second belt 67. The second gear 69 and the fixed member 734 will be further described with reference to FIG.
[0033] As described above with reference to FIGS. 2 and 3, the driving force of the leg driving motor 61 is transmitted to the leg 73 through a path described below. That is, the driving force of the leg driving motor 61 is transmitted from the output shaft of the leg driving motor 61 to the driving shaft 62 through the gear train 61A. The driving force transmitted to the driving shaft 62 is then transmitted to the first belt 63 by the first gear 621. The driving force transmitted to the first belt 63 is further transmitted to the third gear 652 of the compound gear 65. The driving force transmitted to the third gear 652 of the compound gear 65 is transmitted to the fourth gear 653 of the compound gear 65 through the rotation shaft 651 of the compound gear 65. The driving force transmitted to the fourth gear 653 is transmitted to the leg 73 through the second belt 67 and the fixed member 734.
[0034] The first transmission structure 60A and the second transmission structure 60B are configured identically to each other. For example, the first gear 621A of the first transmission structure 60A and the first gear 621B of the second transmission structure 60B are configured to be identical to each other. For example, the material of the first gear 621A is the same as the material of the first gear 621B, and the size of the first gear 621A is formed to be the same as the size of the first gear 621B. For example, when the first gears 621A and 621B are made of plastic, the first gears 621A and 621B are manufactured in the same metal frame under the same manufacturing conditions.
[0035] In this way, since the first transmission structure 60A and the second transmission structure 60B are configured identically to each other, the driving force of the leg driving motor 61 can be distributed evenly to the first transmission structure 60A and the second transmission structure 60B. Therefore, the driving force acting on the first leg 73A and the driving force acting on the second leg 73B can be matched. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0036] In addition, since the first gear 621A and the first gear 621B are configured identically to each other, the driving force of the leg driving motor 61 can be evenly distributed to the first belt 63A and the first belt 63B via the first gear 621A and the first gear 621B. Therefore, the driving force acting on the first leg 73A and the driving force acting on the second leg 73B can be made to match. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0037] Also, for example, the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are configured to be identical to each other. Also, the compound gear 65 is configured with a rotation shaft 651, a third gear 652, and a fourth gear 653. Thus, the rotation shaft 651A of the compound gear 65A and the rotation shaft 651B of the compound gear 65B are configured to be identical to each other. Also, the third gear 652A of the compound gear 65A and the third gear 652B of the compound gear 65B are configured to be identical to each other. Also, the fixed position of the third gear 652A of the compound gear 65A with respect to the rotation shaft 651A is configured to be identical to the fixed position of the third gear 652B of the compound gear 65B with respect to the rotation shaft 651B. Also, the fourth gear 653A of the compound gear 65A and the fourth gear 653B of the compound gear 65B are configured to be identical to each other. Further, the fixed position of the fourth gear 653A of the compound gear 65A relative to the rotation shaft 651A is configured to be identical to the fixed position of the fourth gear 653B of the compound gear 65B relative to the rotation shaft 651B.
[0038] Also, for example, the compound gear 65A is fixed to the frame 75A in the front-rear and up-down directions at the same positions as the compound gear 65B is fixed to the frame 75B in the front-rear and up-down directions. Also, for example, the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are arranged in the same direction. For example, in the first transmission structure 60A, the compound gear 65A is arranged in the frame body 75A so that the center position of the fourth gear 653A is located to the left of the center position of the third gear 652A. Similarly, in the second transmission structure 60B, the compound gear 65B is arranged in the frame body 75B so that the center position of the fourth gear 653B is located to the left of the center position of the third gear 652B. Also, in other words, the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are arranged to face the same direction. For example, in the positive direction of the X-axis, the compound gear 65A and the compound gear 65B are installed so that they face the same direction. Also, for example, the relative position between the third gear 652A and the fourth gear 653A in the positive direction of the X-axis is the same as the relative position between the third gear 652B and the fourth gear 653B.
[0039] In this way, since the compound gear 65A and the compound gear 65B are configured identically to each other, the driving force of the leg driving motor 61 can be evenly distributed to the second belt 67A and the second belt 67B via the compound gear 65A and the compound gear 65B. Therefore, the driving force acting on the first leg 73A and the driving force acting on the second leg 73B can be matched. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0040] Also, for example, the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B are configured to be identical to each other. For example, the first belt 63A is disposed on the right side of the first leg 73A, and the first belt 63B is disposed on the right side of the second leg 73B. Also, for example, the first belt 63A and the first belt 63B are configured as toothed belts made of the same material. The toothed belt is a belt in which ribs are formed so as to mesh with teeth formed on the outer periphery of the first gear 621 and teeth formed on the outer periphery of the third gear 652 of the compound gear 65. The first belt 63A and the first belt 63B are formed, for example, by an open belt. In this case, the first belt 63A and the first belt 63B are formed by cutting the same toothed belt to the same length and joining both ends.
[0041] In this way, since the first belt 63A and the first belt 63B are configured identically to each other, the driving force of the leg drive motor 61 can be evenly distributed to the compound gear 65A and the compound gear 65B via the first belt 63A and the first belt 63B. Therefore, the driving force acting on the first leg 73A and the driving force acting on the second leg 73B can be matched. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0042] For example, the second belt 67A of the first transmission structure 60A and the second belt 67B of the second transmission structure 60B are configured to be the same as each other. For example, the second belt 67A and the second belt 67B are configured as toothed belts made of the same material. The toothed belt is a belt on which ribs are formed so as to mesh with teeth formed on the outer periphery of the fourth gear 653 of the compound gear 65 and teeth formed on the outer periphery of the second gear 69. The second belt 67A and the second belt 67B are formed, for example, by an open belt. In this case, the second belt 67A and the second belt 67B are formed by cutting the same toothed belt to the same length and joining both ends.
[0043] In this way, since the second belt 67A and the second belt 67B are configured identically to each other, the driving force of the leg driving motor 61 can be distributed evenly to the first leg 73A and the second leg 73B via the second belt 67A and the second belt 67B. Therefore, the driving force acting on the first leg 73A and the driving force acting on the second leg 73B can be matched. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0044] As described with reference to FIGS. 1 to 3, the movement mechanism 70 includes a main frame 71, a pair of legs 73, and a carriage 89. The main frame 71 is a plate-like member that is long in the left-right direction. The pair of legs 73 are fitted into a pair of guide shafts 51 and move along the guide shafts 51. The main frame 71 is fixed to the upper ends of the pair of legs 73 and is supported from below by the pair of legs 73. The main frame 71, together with the pair of legs 73, is guided by the pair of guide shafts 51 and moves in the front-rear direction.
[0045] The pair of legs 73 are driven by the drive mechanism 50. Specifically, the second belt 67 is fixed to each of the pair of legs 73 by a fixing member 734. Therefore, as the second belt 67 is driven in a circulating manner, a power that moves the pair of legs 73 in the front-rear direction acts on the pair of legs 73. As a result, the movement mechanism 70 moves in the front-rear direction.
[0046] The rotation direction of the leg drive motor 61 can be switched between a forward direction for moving the main frame 71 forward, and a reverse direction for moving the main frame 71 backward. The printing device 1 moves the main frame 71 forward and backward by operating the leg drive motor 61 in accordance with instructions from a control unit (not shown).
[0047] [3. Leg structure] Next, the configuration of the leg portion 73 will be described with reference to Figures 4 and 5. Figure 4 is a perspective view showing an example of the configuration of the leg portion 73. As shown in FIG. 4, the leg portion 73 includes a first member 731, a second member 732, and a third member 733. The first member 731 is a member that realizes the main function of the leg 73. The first member 731 is formed of, for example, hard plastic. Ribs are formed in a lattice pattern on the first member 731 to ensure strength. The ribs are formed by protruding leftward from a plate-shaped member formed on the right end of the first member 731.
[0048] An upper end 731A of the first member 731 is formed in a flat shape. A right end of the main frame 71 is fixed to the upper end 731A. The lower end 731B of the first member 731 is formed with an upwardly protruding recess. The recess extends in the front-rear direction. The recess formed in the lower end 731B is fitted with the guide shaft 51 so as to be movable in the front-rear direction.
[0049] The second member 732 is a plate-like member disposed along the left side surface of the first member 731. The second member 732 is formed of a metal such as stainless steel. The second member 732 is fixed to the left side surface of the first member 731 with a plurality of bolts. The third member 733 is a plate-like member disposed along the right side surface of the first member 731. The third member 733 is formed of a metal such as stainless steel. The third member 733 is fixed to the right side surface of the first member 731 with a plurality of bolts. The second member 732 and the third member 733 are reinforcing members fixed to the first member 731 in order to improve the strength of the leg portion 73.
[0050] 5 is a perspective view showing an example of the configuration of the fixing member 734 that fixes the leg portion 73 to the second belt 67. As shown in FIG. 5, the fixing member 734 is formed on the left side surface of the leg portion 73 so as to protrude leftward. The fixing member 734 fixes the leg portion 73 to the second belt 67. The rear end of the second belt 67 is hung around a second gear 69. The second gear 69 is erected in the vertical direction at the rear end of the frame 75 and is disposed on a frame extending in the front-rear direction so as to be rotatable about an axis extending in the left-right direction. The fixing member 734 fixes the leg portion 73 to the lower path of the second belt 67 .
[0051] As shown by the arrows, when the upper path of the second belt 67 is driven backward and the lower path of the second belt 67 is driven forward, the leg 73 is moved forward, as shown by the hollow arrow.
[0052] The fixed member 734 is composed of an upper member 734A and a lower member 734B. The upper member 734A and the lower member 734B are fixed to the second belt 67 by sandwiching the second belt 67 of the lower path between them. The upper member 734A is disposed between the upper path of the second belt 67 and the lower path of the second belt 67, and is fixed to the upper surface of the lower path of the second belt 67. The second belt 67 is a belt on which ribs are formed so as to mesh with the teeth formed on the outer periphery of the fourth gear 653 of the compound gear 65 and the teeth formed on the outer periphery of the second gear 69. The ribs of the second belt 67 are formed on the upper surface of the second belt 67 in the lower path of the second belt 67. A rib protruding downward is formed on the lower surface of the upper member 734A so as to engage with the rib formed on the upper surface of the second belt 67. In this way, the ribs formed on the lower surface of the upper member 734A fit with the ribs of the second belt 67, so that the fixing member 734 is fixed to the second belt 67 reliably.
[0053] The lower member 734B is disposed below the lower path of the second belt 67. Ribs are formed on the upper surface of the lower member 734B to increase the coefficient of friction between the lower member 734B and the second belt 67. The ribs formed on the upper surface of the lower member 734B are shifted in the front-rear direction relative to the ribs formed on the lower surface of the upper member 734A so as to mesh with the ribs formed on the lower surface of the upper member 734A. In this way, the ribs formed on the upper surface of the lower member 734B are offset in the front-to-rear direction relative to the ribs formed on the lower surface of the upper member 734A so as to interlock with the ribs formed on the lower surface of the upper member 734A, thereby ensuring that the fixing member 734 is securely fixed to the second belt 67.
[0054] [4. Belt tension adjustment mechanism] Next, an adjustment mechanism for adjusting the tension of the first belt 63 and the second belt 67 will be described with reference to FIGS. FIG. 6 is a perspective view showing an example of an adjustment mechanism for adjusting the tension of the first belt 63. As shown in FIG. The first transmission structure 60A includes a first adjustment mechanism that adjusts the tension of the first belt 63A. Similarly, the second transmission structure 60B includes a second adjustment mechanism that adjusts the tension of the first belt 63B. The first adjustment mechanism and the second adjustment mechanism are disposed at the same position in the front-rear direction. Furthermore, the first adjustment mechanism and the second adjustment mechanism have the same configuration. Therefore, the first adjustment mechanism will be described with reference to FIG. 6, and a description of the second adjustment mechanism will be omitted. 6, the first belt 63 is the first belt 63A of the first transmission structure 60A. As described with reference to FIG. 2, the first belt 63A is a circular belt that is stretched between the first gear 621A and the third gear 652A of the compound gear 65A.
[0055] The third gear 652A of the compound gear 65A is disposed above the first gear 621 A. A tension adjustment pulley 64A is disposed in the rear path of the first belt 63A so as to press the first belt 63A forward. The tension adjustment pulley 64A is configured to be rotatable around a rotation shaft 641A extending in the left-right direction. The rotation shaft 641A is supported by a support member 642A. The support member 642A is a plate-shaped member fixed to the front end of the first frame body 75A. The support member 642A is fixed to the front end of the first frame body 75A in parallel with the XZ plane. The support member 642A is formed with an elongated hole LH1 through which the rotation shaft 641A is inserted. The elongated hole LH1 extends in the front-rear direction. The tension adjustment pulley 64A and the long hole LH1 correspond to an example of a "first adjustment mechanism."
[0056] By moving the rotating shaft 641A forward, the tension adjustment pulley 64A moves forward, and the tension of the first belt 63A can be increased. Also, by moving the rotating shaft 641A rearward, the tension adjustment pulley 64A moves rearward, and the tension of the first belt 63A can be decreased. In this way, the tension of the first belt 63A can be adjusted by adjusting the position of the tension adjustment pulley 64A.
[0057] An encoder 622 is disposed on the right end of the drive shaft 62. The encoder 622 detects the rotation direction and rotation speed of the drive shaft 62. There are four types of encoders 622: mechanical, optical, magnetic, and electromagnetic induction. A case where the encoder 622 is, for example, a magnetic type will be described. The encoder 622 is composed of a disk attached to the drive shaft 62 and a magnetic sensor. The disk has an S pole and an N pole formed as a permanent magnet.
[0058] The magnetic sensor reads the change in the magnetic field distribution created by the permanent magnet as the disk rotates. The magnetic sensor then detects the rotation direction and rotation speed of the drive shaft 62 based on the change in the magnetic field distribution. The magnetic sensor outputs the detected rotation direction and rotation speed of the drive shaft 62 to a control unit (not shown). The control unit uses the rotation direction and rotation speed of the drive shaft 62 detected by the encoder 622 to control the rotation direction and rotation speed of the leg drive motor 61, thereby controlling the positions of the first leg 73A and the second leg 73B.
[0059] Fig. 7 is a perspective view showing an example of an adjustment mechanism for adjusting the tension of the second belt 67. The adjustment mechanism adjusts the tension of the second belt 67, for example, by moving the rotation shaft 691 of the second gear 69 shown in Fig. 5 in the front-rear direction. The first transmission structure 60A includes a third adjustment mechanism that adjusts the tension of the second belt 67A. Similarly, the second transmission structure 60B includes a fourth adjustment mechanism that adjusts the tension of the second belt 67B. The third adjustment mechanism and the fourth adjustment mechanism are disposed at the same position in the up-down direction. The third adjustment mechanism and the fourth adjustment mechanism have the same configuration. 7, a description will be given of an adjustment mechanism for adjusting the tension of the second belt 67. The adjustment mechanism includes a third adjustment mechanism and a fourth adjustment mechanism. As shown in FIG. 7, a rotation shaft 691 of the second gear 69 is rotatably supported by a support member 692.
[0060] The frame 75 has a bottom member 751, a right side member 752, and a left side member 753. The bottom member 751 is formed in a U-shaped cross section, and constitutes the bottom surface of the frame 75. The right side member 752 and the left side member 753 are fixed to the bottom member 751 with a plurality of bolts. The right side member 752 is a plate-shaped member, is disposed on the right side of the bottom member 751, and is fixed to the bottom member 751 parallel to the YZ plane. The left side member 753 is a plate-shaped member, is disposed on the left side of the bottom member 751, and is fixed to the bottom member 751 parallel to the YZ plane.
[0061] An elongated hole LH2 for inserting a bolt for fixing the support member 692 is formed in approximately the center in the up-down direction of the rear end portions of the right side member 752 and the left side member 753. The elongated hole LH2 extends in the front-rear direction. The support member 692 provided in the first transmission structure 60A will be referred to as a support member 692A, and the support member 692 provided in the second transmission structure 60B will be referred to as a support member 692B. The support member 692A corresponds to an example of a "third adjustment mechanism" that adjusts the tension of the second belt 67A. The support member 692B corresponds to an example of a "fourth adjustment mechanism" that adjusts the tension of the second belt 67B.
[0062] By moving the support member 692 forward relative to the right side member 752 and the left side member 753, the second gear 69 moves forward, and the tension of the second belt 67 can be reduced. Also, by moving the support member 692 rearward relative to the right side member 752 and the left side member 753, the second gear 69 moves rearward, and the tension of the second belt 67 can be increased. In this way, the tension of the second belt 67 can be adjusted by adjusting the position of the second gear 69.
[0063] [5. Detector for detecting the origin position of the first leg] Next, the detector S that detects the origin position of the first leg 73A in the front-rear direction will be described with reference to Fig. 8. Fig. 8 is a perspective view showing an example of the detector S that detects the origin position of the first leg 73A in the front-rear direction. In this embodiment, the detector S detects the origin position of the first leg 73A, but is not limited to this. The detector S may detect the origin position of the second leg 73B.
[0064] 8, the detector S includes a first detector SS and a second detector SE. The first detector SS detects the origin position of the front end of the first leg 73A. The second detector SE detects the origin position of the rear end of the first leg 73A. The first detector SS and the second detector SE are each formed of, for example, a transmission type photoelectric sensor. The first detector SS and the second detector SE are fixed to the right side surface of the bottom member 751A of the frame 75A. In this embodiment, the first detector SS and the second detector SE are each configured as a transmission type photoelectric sensor, but are not limited thereto. The first detector SS and the second detector SE may each be configured as a reflection type photoelectric sensor.
[0065] The first detector SS and the second detector SE have the same configuration, so in the following description, the second detector SE will be described, and a description of the first detector SS will be omitted. A detection rib 735A is disposed on the right side surface of the first leg 73A. The detection rib 735A is formed in a flat plate shape and disposed parallel to the XY plane. The second detector SE includes a projector SE1 and a receiver SE2. The projector SE1 is disposed above the detection rib 735A. The receiver SE2 is disposed below the detection rib 735A. When the first leg 73A is disposed at the origin position at the rear end, the detection rib 735A blocks the light irradiated by the projector SE1 toward the receiver SE2. When the detection rib 735A blocks the light emitted by the light projector SE1 toward the light receiver SE2, the light receiver SE2 outputs a detection signal indicating that the first leg 73A is located at the origin position at the rear end to a control unit (not shown). The control unit adjusts, for example, a count value indicating the position of the first leg 73A in the front-rear direction based on the detection signal from the light receiver SE2.
[0066] In this way, the control unit can adjust, for example, the count value indicating the position of the first leg 73A in the front-rear direction based on the detection result of the detector S. Therefore, the deviation of the count value can be appropriately adjusted. Therefore, the count value indicating the position of the first leg 73A in the front-rear direction can be adjusted to an appropriate value.
[0067] [6. Effects, etc.] As described above, the printing device 1 according to this embodiment includes the medium support section 30 that supports the printing medium M, the recording head 89a that prints on the printing medium M, the movement mechanism 70 that supports the recording head 89a and is configured to be movable in the front-rear direction relative to the medium support section 30, and the drive mechanism 50 that moves the movement mechanism 70 in the front-rear direction. The movement mechanism 70 is provided on the right side of the medium support section 30 in the left-right direction and includes a first guide shaft 51A that extends in the front-rear direction, and a second guide shaft 51B that is provided on the left side of the medium support section 30 in the left-right direction and extends in the front-rear direction. The drive mechanism 50 has a leg drive motor 61 and a transmission structure 60 that transmits the drive force generated by the leg drive motor 61 to the first leg 73A and the second leg 73B, and the leg drive motor 61 is disposed between the first guide shaft 51A and the second guide shaft 51B in the left-right direction and drives the first leg 73A and the second leg 73B in the front-rear direction.
[0068] According to this configuration, the leg driving motor 61 is disposed between the first guide shaft 51A and the second guide shaft 51B in the left-right direction. This makes it possible to suppress the occurrence of a difference between the driving force transmitted from the leg driving motor 61 to the transmission structure 60 that transmits the driving force to the first leg 73A and the driving force transmitted to the transmission structure 60 that transmits the driving force to the second leg 73B. This allows the first leg 73A and the second leg 73B to move smoothly.
[0069] Furthermore, in the printing device 1, the leg drive motor 61 is disposed approximately in the center between the first guide shaft 51A and the second guide shaft 51B in the left-right direction.
[0070] According to this configuration, the leg driving motor 61 is disposed approximately in the center between the first guide shaft 51A and the second guide shaft 51B in the left-right direction. This makes it possible to suppress the occurrence of a difference between the driving force transmitted from the leg driving motor 61 to the transmission structure 60 that transmits the driving force to the first leg 73A and the driving force transmitted to the transmission structure 60 that transmits the driving force to the second leg 73B. This allows the first leg 73A and the second leg 73B to move smoothly.
[0071] In addition, in the printing device 1, the transmission structure 60 has one drive shaft 62 extending in the left-right direction, a first transmission structure 60A that transmits the driving force from the drive shaft 62 to the first leg 73A, and a second transmission structure 60B that transmits the driving force from the drive shaft 62 to the second leg 73B, and the first transmission structure 60A and the second transmission structure 60B are configured identically to each other.
[0072] According to this configuration, the first transmission structure 60A and the second transmission structure 60B are configured identically to each other. Therefore, it is possible to suppress the occurrence of a difference between the driving force transmitted to the first leg 73A by the first transmission structure 60A and the driving force transmitted to the second leg 73B by the second transmission structure 60B. Therefore, it is possible to move the first leg 73A and the second leg 73B smoothly.
[0073] In addition, in the printing device 1, each of the first transmission structure 60A and the second transmission structure 60B has a first gear 621 arranged at the end in the left-right direction of the drive shaft 62, a second belt 67 that transmits driving force to each of the first leg portion 73A and the second leg portion 73B, a first belt 63 that transmits driving force between the first gear 621 and the second belt 67, and a compound gear 65 that transmits driving force between the first belt 63 and the second belt 67, and the first gear 621A of the first transmission structure 60A and the first gear 621B of the second transmission structure 60B are configured identically to each other, and the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are configured identically to each other.
[0074] According to this configuration, the first gear 621A of the first transmission structure 60A and the first gear 621B of the second transmission structure 60B are configured to be identical to each other, and the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are configured to be identical to each other. Therefore, it is possible to suppress the occurrence of a difference between the driving force transmitted to the first leg 73A via the first gear 621A and the compound gear 65A and the driving force transmitted to the second leg 73B via the first gear 621B and the compound gear 65B. Therefore, it is possible to smoothly move the first leg 73A and the second leg 73B.
[0075] In the printing device 1, the compound gear 65A of the first transmission structure 60A and the compound gear 65B of the second transmission structure 60B are arranged to face in the same direction.
[0076] According to this configuration, the compound gear 65A and the compound gear 65B are arranged facing the same direction. Therefore, it is possible to suppress the occurrence of a difference between the driving force transmitted to the first leg 73A via the compound gear 65A and the driving force transmitted to the second leg 73B via the compound gear 65B. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0077] Furthermore, in the printing device 1, the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B are each composed of the same type of belt, and the second belt 67A of the first transmission structure 60A and the second belt 67B of the second transmission structure 60B are each composed of the same type of belt.
[0078] According to this configuration, the first belt 63A and the first belt 63B are made of the same type of belt, and the second belt 67A and the second belt 67B are made of the same type of belt. Therefore, it is possible to suppress the occurrence of a difference between the driving force transmitted to the first leg 73A via the first belt 63A and the second belt 67A and the driving force transmitted to the second leg 73B via the first belt 63B and the second belt 67B. Therefore, it is possible to move the first leg 73A and the second leg 73B smoothly.
[0079] In the printing device 1, the width of the second belt 67 is wider than the width of the first belt 63.
[0080] According to this configuration, the width of the second belt 67 is wider than the width of the first belt 63. This makes it possible to suppress the difference in the moving speed between the first leg 73A and the second leg 73B. This allows the first leg 73A and the second leg 73B to move smoothly.
[0081] In addition, in the printing device 1, in the first transmission structure 60A, the second belt 67A is arranged on the left side of the first leg 73A in the left-right direction, and in the second transmission structure 60B, the second belt 67B is arranged on the left side of the second leg 73B in the left-right direction.
[0082] According to this configuration, the second belt 67A is disposed on the left side of the first leg 73A in the left-right direction, and the second belt 67B is disposed on the left side of the second leg 73B in the left-right direction. This makes it possible to suppress the occurrence of a difference in the moving speed between the first leg 73A and the second leg 73B. This allows the first leg 73A and the second leg 73B to move smoothly.
[0083] Furthermore, in the printing device 1, the first transmission structure 60A has a tension adjustment pulley 64A that adjusts the tension of the first belt 63A, and the second transmission structure 60B has a tension adjustment pulley 64B that adjusts the tension of the first belt 63B, and the tension adjustment pulley 64A and the tension adjustment pulley 64B are arranged at the same position in the vertical direction.
[0084] According to this configuration, the tension adjustment pulley 64A and the tension adjustment pulley 64B are disposed at the same position in the vertical direction. It is possible to suppress the occurrence of a difference between the influence of the tension adjustment pulley 64A on the driving force transmitted by the first belt 63A and the influence of the tension adjustment pulley 64B on the driving force transmitted by the first belt 63B. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0085] Furthermore, in the printing device 1, the first transmission structure 60A has a support member 692A that adjusts the tension of the second belt 67A, and the second transmission structure 60B has a support member 692B that adjusts the tension of the second belt 67B, and the support members 692A and 692B are arranged at the same position in the vertical direction.
[0086] According to this configuration, the support members 692A and 692B are disposed at the same position in the vertical direction. It is possible to suppress the occurrence of a difference between the effect of the support member 692A on the driving force transmitted by the second belt 67A and the effect of the support member 692A on the driving force transmitted by the second belt 67B. Therefore, the first leg portion 73A and the second leg portion 73B can be moved smoothly.
[0087] Furthermore, in the printing device 1, the first transmission structure 60A has a detector S that detects the origin position of the first leg 73A in the front-to-rear direction, and the detector S is disposed on the opposite side of the first leg 73A from the second belt 67A.
[0088] According to this configuration, the detector S detects the origin position of the first leg 73A in the front-rear direction. Therefore, the count values of the front-rear direction positions of the first leg 73A and the second leg 73B can be corrected. In addition, the detector S is disposed on the opposite side of the first leg 73A from the second belt 67A. Therefore, the origin position of the first leg 73A in the front-rear direction can be accurately detected without being affected by the second belt 67A.
[0089] In the printing device 1, the first leg portion 73A and the second leg portion 73B are configured identically to each other.
[0090] According to this configuration, the first leg 73A and the second leg 73B are configured to be identical to each other, and therefore the first leg 73A and the second leg 73B can be moved smoothly.
[0091] 5. Other embodiments The above embodiment is merely a specific example of the application of the present invention. The present invention is not limited to the configuration of the above embodiment, and can be embodied in various forms without departing from the gist of the invention.
[0092] In this embodiment, the leg driving motor 61 is described as being disposed between the first guide shaft 51A and the second guide shaft 51B in the left-right direction, but is not limited thereto. For example, the leg driving motor 61 is preferably disposed at a substantially central position between the first guide shaft 51A and the second guide shaft 51B in the left-right direction. Furthermore, for example, it is more preferable that the leg driving motor 61 is disposed at a central position between the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B in the left-right direction. When the leg drive motor 61 is disposed in the center position between the first belt 63A of the first transmission structure 60A and the first belt 63B of the second transmission structure 60B in the left-right direction, the driving force transmitted to the first transmission structure 60A and the driving force transmitted to the second transmission structure 60B can be made to match. Therefore, the first leg 73A and the second leg 73B can be moved smoothly.
[0093] In the present embodiment, the second belt 67 is disposed on the left side of the leg 73, but is not limited thereto. For example, the second belt 67 may be disposed on the right side of the leg 73. In this case, the second belt 67A is disposed on the right side of the first leg 73A, and the second belt 67B is disposed on the right side of the second leg 73B.
[0094] In the present embodiment, after the recording head 89a ejects the liquid onto the printing medium M, the irradiation unit 89b irradiates the liquid with irradiation light, but this is only an example. For example, the printing device 1 may not include the irradiation unit 89b. [Explanation of symbols]
[0095] 1...printing device, 15...base member, 30...medium support section, 31...table, 31m...support surface, 31n...projection, 32...height movement mechanism, 33...lifting motor, 37...lifting belt, 39...lifting mechanism, 50...driving mechanism, 51...guide shaft, 51A...first guide shaft, 51B...second guide shaft, 60...transmission structure, 60A...first transmission structure, 60B...second transmission structure, 61...leg drive motor (driving source), 62...drive shaft, 621, 621A, 621B...first gear, 63, 63A, 63B...first belt, 64A...tension adjustment pulley (first adjustment mechanism), 64B...tension adjustment pulley (second adjustment mechanism), 65, 65A , 65B...compound gear, 67, 67A, 67B...second belt, 69, 69A, 69B...second gear, 692...support member, 692A...support member (third adjustment mechanism), 692B...support member (fourth adjustment mechanism), 70...moving mechanism, 70A...first moving mechanism, 70B...second moving mechanism, 71...main frame, 73...leg, 73A...first leg, 73B...second leg, 75...frame, 75A...first frame, 75B...second frame, 89...carriage, 89a...recording head (printing unit), LH1...long hole, LH2...long hole, M...printing medium, S...detector, SE...second detector, SE1...light emitter, SE2...light receiver, SS...first detector.
Claims
1. A medium support section that supports a print medium; a printing unit that prints on the print medium; a moving mechanism configured to support the printing unit and to be movable in a first direction relative to the medium support unit; a drive mechanism that moves the movement mechanism in the first direction, The moving mechanism includes: a first guide shaft provided on one side of the medium support unit in a second direction intersecting the first direction and extending in the first direction; a second guide shaft provided on the other side of the medium support portion in the second direction and extending in the first direction; A first leg portion movably supported on the first guide shaft; a second leg portion movably supported on the second guide shaft, the drive mechanism includes a drive source and a transmission structure that transmits a drive force generated by the drive source to the first leg and the second leg; The driving source is The guide shaft is disposed between the first guide shaft and the second guide shaft in the second direction, Driving the first leg and the second leg in the first direction. Printing device.
2. The drive source is disposed approximately in the center between the first guide shaft and the second guide shaft in the second direction. The printing device of claim 1 .
3. The transmission structure includes: A single drive shaft extending in the second direction; a first transmission structure that transmits a driving force from the drive shaft to the first leg; a second transmission structure that transmits a driving force from the drive shaft to the second leg; having The first transmission structure and the second transmission structure are configured identically to each other. The printing device of claim 1 .
4. Each of the first transmission structure and the second transmission structure is a first gear disposed at an end of the drive shaft in the second direction; a second belt that transmits the driving force to each of the first leg portion and the second leg portion; a first belt that transmits the driving force between the first gear and the second belt; a compound gear that transmits the driving force between the first belt and the second belt; having The first gear of the first transmission structure and the first gear of the second transmission structure are configured identically to each other, The compound gear of the first transmission structure and the compound gear of the second transmission structure are configured identically to each other. The printing device according to claim 3 .
5. The compound gear of the first transmission structure and the compound gear of the second transmission structure are arranged to face the same direction. The printing device according to claim 4.
6. the first belt of the first transmission structure and the first belt of the second transmission structure are configured of the same type of belt, The second belt of the first transmission structure and the second belt of the second transmission structure are configured of the same type of belt. The printing device according to claim 4.
7. The width of the second belt is wider than the width of the first belt. The printing device according to claim 4.
8. In the first transmission structure, the second belt is disposed on the other side of the first leg in the second direction, In the second transmission structure, the second belt is disposed on the other side in the second direction with respect to the second leg portion. The printing device according to claim 4.
9. the first transmission structure has a first adjustment mechanism that adjusts the tension of the first belt, the second transmission structure has a second adjustment mechanism that adjusts the tension of the first belt, The first adjustment mechanism and the second adjustment mechanism are disposed at the same position in the up-down direction. The printing device according to claim 4.
10. the first transmission structure has a third adjustment mechanism that adjusts the tension of the second belt, the second transmission structure has a fourth adjustment mechanism that adjusts the tension of the second belt, The third adjustment mechanism and the fourth adjustment mechanism are disposed at the same position in the up-down direction. The printing device according to claim 4.
11. the first transmission structure has a detector that detects an origin position of the first leg in the first direction; The detector is disposed on an opposite side of the first leg from the second belt. The printing device according to claim 4.
12. The first leg and the second leg are configured identically to each other. The printing device of claim 1 .
Citation Information
Patent Citations
Image forming apparatus, image forming method and image forming program
JP2021066045A