Printing device

Abstract

The present invention provides a printing device. The printing device has a support unit and a device main body. The support unit includes a holding member for a cylindrical body, a contact portion that contacts a setting surface, and a shaft member. The device main body includes a support portion for the shaft member and a fixing portion for the support unit. The shaft member can be detached from and attached to the support portion by moving the support unit relative to the device main body. The support unit can rotate to a first position and a second position with the shaft member as a reference in a state where the shaft member is supported by the support portion. The first position is the position where the shaft member is installed relative to the support portion, and the second position is the position where the device main body fixes the support unit through the fixing portion and is the position where the contact portion separates from the setting surface.

Description

Technical Field

[0001] The present invention relates to a printing device. Background Art

[0002] Hitherto, various printing devices have been used. Among them, there are a printing device capable of printing a medium wound in a roll shape, and a printing device capable of winding the printed medium into a roll shape. For example, Patent Document 1 discloses a recording device that sequentially conveys a roll medium placed on a unwind unit and performs printing, and winds the printed medium into a roll shape using a winding device.

[0003] In a printing device having a structure for holding a roll body of a medium as in the recording device of Patent Document 1, it is difficult to place a heavy roll body on a holding member, or the roll body may not be arranged at a correct position. When the roll body is not arranged at a correct position, there may be a case where the medium wound in a roll shape cannot be unwound at a correct position, resulting in a conveyance failure, or a case where a winding failure occurs due to a shift in the winding position when the medium is wound into a roll shape. Therefore, an object of the present invention is to simply arrange the roll body at a correct position.

[0004] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2012-166914 Summary of the Invention

[0005] The printing apparatus of the present invention for solving the above problems is characterized by comprising: a device main body having a printing unit for printing on a medium; a drum body support unit that can move along the installation surface of the device main body in a moving direction intersecting the axial direction of the drum body as the medium while holding the drum body, the drum body support unit comprising: a holding member that rotatably holds the drum body; a contact portion that contacts the installation surface; a shaft member that extends in the axial direction at a position above the contact portion in the vertical direction, the device main body comprising: a support portion that supports the shaft member; a fixing portion that fixes the drum body support unit, the shaft member can be disassembled and assembled relative to the support portion by moving the drum body support unit relative to the device main body in the moving direction, the drum body support unit can rotate to a first position and a second position with the shaft member as a reference in a state where the shaft member is supported by the support portion, the first position is a position where the shaft member is installed relative to the support portion by the drum body support unit approaching the device main body along the moving direction, the second position is a position where the device main body fixes the drum body support unit through the fixing portion, and is a position where the contact portion separates from the installation surface or the force applied from the contact portion to the installation surface is reduced compared to when the drum body support unit is in the first position. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 FIG. 6 is a side view of the printing apparatus according to Embodiment 1 of the present invention.

[0007] Figure 2 FIG. 7 is a schematic side cross-sectional view of the drum body support unit of the printing apparatus according to Embodiment 1 of the present invention and the device main body in its vicinity, and is a view showing a state where the device main body and the drum body support unit are in a separated position.

[0008] Figure 3 FIG. 8 is a schematic side cross-sectional view of the drum body support unit of the printing apparatus according to Embodiment 1 of the present invention and the device main body in its vicinity, and is a view showing a state where the drum body support unit is in the first position.

[0009] Figure 4 FIG. 9 is a schematic side cross-sectional view of the drum body support unit of the printing apparatus according to Embodiment 1 of the present invention and the device main body in its vicinity, and is a view showing a state where the drum body support unit is in the second position.

[0010] Figure 5A schematic front view of the periphery of the contact portion and the support portion of the printing apparatus according to Embodiment 1 of the present invention, and a view showing the positional relationship between the contact portion and the support portion provided at the feet and the first shaft member.

[0011] Figure 6 A schematic side sectional view of the drum support unit of the printing apparatus according to Embodiment 2 of the present invention and the apparatus main body in its periphery, and a view showing a state where the drum support unit is in the second position. Detailed Description

[0012] First, a schematic description of the present invention will be given.

[0013] The printing apparatus according to the first aspect of the present invention for solving the above problems is characterized by comprising: a device main body having a printing unit for printing on a medium; a drum support unit capable of moving along the installation surface of the device main body in a moving direction intersecting the reel direction of the drum as the medium while holding the drum, the drum support unit including: a holding member for rotatably holding the drum; a contact portion for contacting the installation surface; a shaft member extending along the reel direction at a position above the contact portion in the vertical direction, the device main body including: a support portion for supporting the shaft member; a fixing portion for fixing the drum support unit, the shaft member being detachable from the support portion by moving the drum support unit relative to the device main body in the moving direction, the drum support unit being rotatable about the shaft member to a first position and a second position in a state where the shaft member is supported by the support portion, the first position being a position where the shaft member is installed relative to the support portion by moving the drum support unit along the moving direction closer to the device main body, the second position being a position where the device main body fixes the drum support unit through the fixing portion, and being a position where the contact portion separates from the installation surface or the force applied from the contact portion to the installation surface is reduced compared to when the drum support unit is in the first position.

[0014] According to this mode, since the reel body support unit can be arranged at a position separated from the device main body and the reel body support unit holds the reel body, it is possible to suppress the case where the device main body becomes an obstacle when the reel body support unit holds the reel body and the operability is reduced. In addition, since the reel body support unit can approach the device main body along the installation surface and the support portion supports the shaft member, the reel body support unit can be simply positioned relative to the device main body. In addition, since the reel body support unit is fixed to the device main body at a plurality of positions of the fixing portion and the support portion, and the reel body support unit is fixed to the device main body at a position where the force applied from the contact portion to the installation surface is reduced compared to when the contact portion is separated from the installation surface or the reel body support unit is in the first position, the reel body support unit can be firmly fixed to the device main body regardless of the state of the installation surface. Therefore, the reel body can be simply arranged at the correct position.

[0015] The printing device according to the second mode of the present invention is characterized in that, in the first mode, the reel body support unit has a fixed portion at a position where the reel body support unit does not contact the device main body when the reel body support unit is in the first position and at a position different from the shaft member in the vertical direction, and the fixed portion is fixed to the fixing portion when the reel body support unit is in the second position.

[0016] According to this mode, a fixed portion is provided at a position different from the shaft member in the vertical direction, and the fixed portion is fixed to the fixing portion when the reel body support unit is in the second position. Therefore, in the second position, in addition to the support portion and the shaft member, the reel body support unit can be firmly fixed to the device main body by the fixing portion and the fixed portion. In addition, since the fixed portion is in a position where it does not contact the device main body when the reel body support unit is in the first position, it is possible to suppress the case where the fixed portion interferes with the device main body when the reel body support unit approaches the device main body along the installation surface so that the support portion supports the shaft member.

[0017] The printing device according to the third mode of the present invention is characterized in that, in the second mode, the fixed portion is provided at a position above the shaft member in the vertical direction.

[0018] According to this mode, the fixed portion is provided at a position above the shaft member in the vertical direction. By adopting such a structure, the load when the reel body support unit is displaced from the first position to the second position can be reduced.

[0019] The printing apparatus according to the fourth aspect of the present invention is characterized in that, in the second aspect or the third aspect, the apparatus main body includes a sensor that detects whether the fixed portion is in a position fixed to the fixing portion.

[0020] According to this aspect, the apparatus main body includes a sensor that detects whether the fixed portion is in a position fixed to the fixing portion. Therefore, it is possible to suppress a situation where the printing operation is started in a state where the drum body support unit is not in the second position which is the standard position.

[0021] The printing apparatus according to the fifth aspect of the present invention is characterized in that, in any one of the first aspect to the fourth aspect, the apparatus main body includes an abutting portion that abuts against the shaft member during installation when the drum body support unit approaches the apparatus main body along the moving direction so that the shaft member is mounted relative to the support portion.

[0022] According to this aspect, the apparatus main body includes an abutting portion that abuts against the shaft member during installation. Therefore, it is possible to abut against the abutting portion to position the drum body support unit relative to the apparatus main body, and it is possible to easily position the drum body support unit relative to the apparatus main body.

[0023] The printing apparatus according to the sixth aspect of the present invention is characterized in that, in the fifth aspect, a guiding structure is formed in the abutting portion, and the guiding structure guides the shaft member to the support portion during the installation.

[0024] According to this aspect, a guiding structure is formed on the abutting portion, and the guiding structure guides the shaft member to the support portion during the installation. Therefore, it is possible to particularly easily position the drum body support unit relative to the apparatus main body.

[0025] The printing apparatus according to the seventh aspect of the present invention is characterized in that, in any one of the first aspect to the sixth aspect, the drum body support unit has a first contact portion and a second contact portion as the contact portions, and in the direction in which the drum body support unit approaches the apparatus main body along the moving direction, the shaft member, the first contact portion, the holding member, and the second contact portion are arranged in order from the leading side.

[0026] According to this mode, the drum body support unit has a first contact portion and a second contact portion as contact portions. In the direction in which the drum body support unit approaches the device main body along the moving direction, a shaft member, a first contact portion, a holding member, and a second contact portion are arranged in order from the head side. Therefore, by clamping the holding member with the first contact portion and the second contact portion, the stability of the drum body support unit is improved, and by arranging the shaft member on the head side, the operability when the drum body support unit is displaced from the first position to the second position can be improved.

[0027] Embodiment 1

[0028] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. First, refer to Figure 1 and explain the outline of the printing apparatus 1 according to Embodiment 1 of the present invention. In addition, in Figure 1 , in order to facilitate understanding of the structure, some structural components are omitted in the drawing. Here, the X-axis direction in the figure is the horizontal direction and corresponds to the reel direction B, which is the extending direction of the holding member 3 for holding the drum body R1 of the medium M to be printed from now on and the holding member 4 for winding the printed medium M into the drum body R2. In addition, the Y-axis direction is the horizontal direction and corresponds to the direction orthogonal to the X-axis direction. In addition, the Z-axis direction is the vertical direction. In addition, hereinafter, the arrow-marked direction is set as the + direction, and the direction opposite to the arrow-marked direction is set as the - direction. For example, the vertically upward direction is set as the +Z direction, and the vertically downward direction is set as the -Z direction.

[0029] The printing apparatus 1 of this embodiment includes a holding member 3 that holds the drum body R1 formed by winding the sheet-like medium M for printing. Moreover, in the printing apparatus 1 of this embodiment, when the medium M is conveyed in the conveying direction A, the holding member 3 rotates in the rotation direction C. In addition, although the drum body R1 wound in such a manner that the printed surface faces the outside is used in this embodiment, when the drum body R1 wound in such a manner that the printed surface faces the inside is used, the holding member 3 can rotate in the direction opposite to the rotation direction C to send out the medium M from the drum body R1.

[0030] In addition, the printing apparatus 1 of the present embodiment includes a conveyance path for the medium M constituted by a medium support portion 20 that supports the medium M and the like. Further, the printing apparatus 1 includes a pair of conveyance rollers 15 constituted by a drive roller 17 and a driven roller 18 for conveying the medium M in the conveyance direction A on the conveyance path. In the printing apparatus 1 of the present embodiment, the drive roller 17 is constituted by a roller extending in the reel direction B intersecting the conveyance direction A, and a plurality of driven rollers 18 are arranged in the reel direction B relative to the drive roller 17 at positions opposed to the drive roller 17. However, the structure of the conveyance portion of the medium M is not particularly limited.

[0031] In addition, a heater 12 is provided below the medium support portion 20 that can heat the medium M supported on the medium support portion 20. However, it may be configured not to have a heating portion for heating the medium M.

[0032] In addition, the printing apparatus 1 of the present embodiment includes a head 19 and a carriage 16 as a printing portion inside the frame portion 11. The head 19 is provided with a plurality of nozzles and ejects ink from the nozzles to perform printing. The carriage 16 mounts the head 19 and can move back and forth in the reel direction B. In the printing apparatus 1 of the present embodiment, the conveyance direction A at the position opposed to the head 19 on the medium support portion 20 is the +Y axis direction, the moving direction of the head 19 is the X axis direction corresponding to the reel direction B, and the ink ejection direction is the -Z direction.

[0033] Here, a frame 14 is formed inside the frame portion 11, and a guide rail 13 is formed. The guide rail 13 is mounted on the frame 14 and extends along the X axis direction. The carriage 16 provided with the head 19 is mounted on the guide rail 13.

[0034] According to the above structure, while the head 19 can move back and forth in the reel direction B intersecting the conveyance direction A, ink is ejected from nozzles (not shown) to the conveyed medium M to perform printing. The printing apparatus 1 of the present embodiment can form a desired image by repeatedly performing the following operations: an operation of conveying the medium M in the conveyance direction A at a predetermined conveyance amount, and an operation of ejecting ink while moving the head 19 in the reel direction B with the medium M stopped.

[0035] In addition, a holding member 4 is provided on the downstream side of the conveying direction A of the head 19. The holding member 4 can wind the medium M on which an image is formed by ejecting ink from the head 19 into a cylindrical body R2. Further, in the present embodiment, since the medium M is wound with the printing surface facing outward, when the medium M is wound, the holding member 4 rotates in the rotation direction C. On the other hand, in the case of winding with the printing surface facing inward, the holding member 4 can rotate in the direction opposite to the rotation direction C to wind the medium M.

[0036] In addition, a tension rod 21 is provided between the end portion on the downstream side of the conveying direction A in the medium support portion 20 and the holding member 4. The portion of the tension rod 21 in contact with the medium M extends along the reel direction B and applies a desired tension force to the medium M. However, a structure without the tension rod 21 may also be adopted.

[0037] Here, the printing apparatus 1 of the present embodiment includes an apparatus main body 2 having a head 19 and the like, and a cylindrical body support unit 5 having a holding member 4. The cylindrical body support unit 5 is configured to be detachable from the apparatus main body 2. Hereinafter, with reference to Figures 3 to 5 the details of the cylindrical body support unit 5 and the mounting portion of the cylindrical body support unit 5 in the apparatus main body 2 will be described.

[0038] In addition, although in the printing apparatus 1 of the present embodiment, the cylindrical body support unit 5 has a structure with a holding member 4, it may also be configured such that a holding member 3 is provided on the cylindrical body support unit 5 instead of providing the holding member 3 on the apparatus main body 2. Therefore, in the following description, in the case of a structure in which the holding member 3 is provided on the cylindrical body support unit 5, the holding member 4 can be understood as being replaced by the holding member 3. A structure in which both the cylindrical body support unit 5 provided with the holding member 4 and the cylindrical body support unit 5 provided with the holding member 3 are used may be adopted, or a structure in which the cylindrical body support unit 5 provided with the holding member 3 is used on the basis of providing the holding member 4 on the apparatus main body 2 may be adopted.

[0039] As Figures 2 to 4As shown, the reel body support unit 5 has a base portion 8, and in this base portion 8, there are a holding member 4, a first shaft member 6, a second shaft member 7, and a wheel 9. The first shaft member 6 and the second shaft member 7 extend along the reel direction B corresponding to the X-axis direction. The reel body support unit 5 has wheels 9A at both end portions in the -Y direction side and in the X-axis direction as the wheels 9, and has wheels 9B at both end portions in the +Y direction side and in the X-axis direction, thus having a total of four wheels 9. In addition, although the printing apparatus 1 in the present embodiment has a structure in which the wheels 9 are provided as contact portions with respect to the installation surface 40 of the printing apparatus 1, it is not limited to such a structure. For example, as this contact portion, instead of the wheels 9, a slider that can slide with respect to the installation surface 40 or a track provided on the installation surface 40, or a caster other than the wheels can also be used.

[0040] In addition, as Figures 2 to 4 shown, the apparatus main body 2 has feet 10, and on the feet 10, there are a support portion 30 that rotatably supports the first shaft member 6 and a fixing portion 31 that can fix the second shaft member 7. As Figure 5 shown, the printing apparatus 1 of the present embodiment has a foot 10A on the +X direction side and a foot 10B on the -X direction side as the feet 10, and has a support portion 30A provided in the foot 10A and a support portion 30B provided in the foot 10B as the support portion 30.

[0041] In addition, as Figure 5 shown, in the foot 10A, an abutting portion 33A is formed at a position where it can contact the first shaft member 6. The abutting portion 33A is located on the -X direction side as it progresses toward the -Y direction side, and the interval in the Z-axis direction becomes narrower. And, as Figure 5 shown, in the foot 10B, an abutting portion 33B is formed at a position where it can contact the first shaft member 6. The abutting portion 33B is located on the +X direction side as it progresses toward the -Y direction side, and the interval in the Z-axis direction becomes narrower. By having such a structure, as it progresses toward the -Y direction side, the interval between the abutting portion 33A and the abutting portion 33B becomes narrower, and the intervals of the abutting portion 33A and the abutting portion 33B in the Z-axis direction also become narrower.

[0042] In addition, a support portion 30A is provided below the leading end side in the -Y direction of the abutting portion 33A, and a support portion 30B is provided below the leading end side in the -Y direction of the abutting portion 33B. By adopting such a structure, when an operator installs the drum body support unit 5 with respect to the apparatus main body 2, while making the first shaft member 6 abut against at least one of the abutting portions 33A and 33B and pushing the first shaft member 6 in the installation direction D1, the support portion 30 can easily support the first shaft member 6.

[0043] Here, with reference to Figures 2 to 4 the steps for installing the drum body support unit 5 with respect to the apparatus main body 2 will be described. Figure 2 shows a state in which the drum body support unit 5 has been removed from the apparatus main body 2. As described above, since the drum body support unit 5 has a total of four wheels 9 at both ends in the X-axis direction and both ends in the Y-axis direction, it can be stably set with respect to the installation surface 40. In addition, as Figure 2 shown, if the drum body support unit 5 is in a state of being removed from the apparatus main body 2, the operator can easily disassemble and assemble the drum body R2 with respect to the holding member 4. In addition, when disassembling and assembling the drum body R2, it also includes the case of disassembling and assembling a reel such as a paper tube for winding the medium M in a state where the medium M is not present.

[0044] Next, Figure 3 shows a state in which the drum body support unit 5 is moved from the state shown in Figure 2 in the moving direction D to the installation direction D1 so that the first shaft member 6 comes into contact with a part of the support portion 30 and is supported by the support portion 30. In addition, in the state where the first shaft member 6 is supported by the support portion 30, it also includes a state where the first shaft member 6 is about to come into contact with the support portion 30, that is, a state where at least a part of the first shaft member 6 is separated from the support portion 30 as shown in Figure 3 shown. Figure 3 The state shown corresponds to the state where the drum body support unit 5 is in the first position P1 and shows a state in which all four wheels 9 are in contact with the installation surface 40. However, depending on the planar state of the installation surface 40, any one of the four wheels 9 may be separated from the installation surface 40.

[0045] Moreover, Figure 4 shows a state in which the drum body support unit 5 is fixed to the apparatus main body 2. Specifically, by causing the fixing portion 31 provided on the apparatus main body 2 to move from Figure 3starting from the state shown, it moves in the fixed direction E1 in the moving direction E, so that the protrusion 32 provided on the fixing part 31 is pressed downward while contacting the second shaft member 7. Thereby, the first shaft member 6 is pushed downward with respect to the support part 30, and the second shaft member 7 is pressed downward with force by using the fixing part 31, so that the drum body support unit 5 is fixed to the apparatus main body 2. Further, by pressing the fixing part 31 downward in the fixed direction E1 while making the protrusion 32 contact the second shaft member 7, the drum body support unit 5 rotates in the rotation direction F1 in the rotation direction F with the first shaft member 6 as a reference. From Figure 4 The state shown corresponds to the state where the drum body support unit 5 is in the second position P2, and represents the state where the drum body support unit 5 is fixed to the apparatus main body 2 and all four wheels 9 are separated from the installation surface 40. However, depending on the structure of the contact parts such as the wheels 9, any one or all of the four wheels 9 may be in contact with the installation surface 40.

[0046] In the state shown by Figure 4 the drum body support unit 5 is reliably fixed to the apparatus main body 2 through the first shaft member 6 and the second shaft member 7. Further, as described above, since there are two legs 10A and 10B in the apparatus main body 2, the first shaft member 6 and the second shaft member 7 are respectively fixed at two places with respect to the apparatus main body 2. That is, the drum body support unit 5 is respectively fixed at four places with respect to the apparatus main body 2.

[0047] In addition, although the above description is about the steps when installing the drum body support unit 5 with respect to the apparatus main body 2, the steps when removing the drum body support unit 5 from the apparatus main body 2 are as described below. First, starting from the state shown by Figure 4 the fixing part 31 is moved in the opening direction E2 in the moving direction E. Then, the drum body support unit 5 rotates in the rotation direction F2 in the rotation direction F. That is, the drum body support unit 5 rotates from the second position P2 shown by Figure 4 to the first position P1 shown by Figure 3 . Then, by moving the drum body support unit 5 in the detachment direction D2 in the moving direction D, the drum body support unit 5 is removed from the apparatus main body 2 as shown by Figure 2 .

[0048] Here, once summarized, the printing apparatus 1 of the present embodiment includes: a device main body 2 having a head 19 for printing on a medium M; and a cylindrical body support unit 5 that can move along a mounting surface 40 of the device main body 2 in a moving direction D intersecting a reel axis direction B of a cylindrical body R2 as the medium M while holding the cylindrical body R2. Further, the cylindrical body support unit 5 includes: a holding member 4 that rotatably holds the cylindrical body R2; wheels 9 as contact portions that contact the mounting surface 40; and a first shaft member 6 that extends along the reel axis direction B at a position vertically above the wheels 9. In addition, the device main body 2 includes a support portion 30 that supports the first shaft member 6 and a fixing portion 31 that fixes the cylindrical body support unit 5.

[0049] In addition, as described above, the first shaft member 6 can be detached from and attached to the support portion 30 by moving the cylindrical body support unit 5 relative to the device main body 2 in the moving direction D. Further, the cylindrical body support unit 5 can rotate about the first shaft member 6 as a reference to a first position P1 and a second position P2 in a state where the first shaft member 6 is supported by the support portion 30. Here, the first position P1 is a position where the first shaft member 6 is attached to the support portion 30 by moving the cylindrical body support unit 5 closer to the device main body 2 along the moving direction D. Further, the second position P2 is a position where the device main body 2 fixes the cylindrical body support unit 5 through the fixing portion 31, and is a position where the wheels 9 as the contact portions separate from the mounting surface 40. However, as described above, depending on the structure of the contact portions or the like, the contact portions may not separate from the mounting surface 40, and the second position P2 only needs to be a position where the force applied to the mounting surface 40 from the contact portions is smaller than when the cylindrical body support unit 5 is in the first position P1.

[0050] In addition, the meaning of "can rotate about the first shaft member 6 as a reference to the first position P1 and the second position P2" is that it only needs to be possible to rotate to the first position P1 and the second position P2 while allowing the first shaft member 6 to move slightly during rotation. In the printing apparatus 1 of the present embodiment, when the cylindrical body support unit 5 rotates about the first shaft member 6 as a reference to the first position P1 and the second position P2, the position of the first shaft member 6 also moves slightly up and down.

[0051] Thus, in the printing apparatus 1 of the present embodiment, since the drum body support unit 5 can be disposed at a position separated from the apparatus main body 2 and the drum body support unit 5 can hold the drum body R2, it is possible to suppress a situation where the apparatus main body 2 becomes an obstacle when the drum body support unit 5 holds the drum body R2 and the operability is reduced. Further, since the drum body support unit 5 can be brought close to the apparatus main body 2 along the installation surface 40 and the support portion 30 can support the first shaft member 6, the drum body support unit 5 can be simply positioned relative to the apparatus main body 2. Further, in the printing apparatus 1 of the present embodiment, since the drum body support unit 5 is fixed to the apparatus main body 2 at a plurality of positions of the fixing portion 31 and the support portion 30, and the drum body support unit 5 is fixed to the apparatus main body 2 at a position where the force applied from the contact portion to the installation surface 40 is reduced compared to when the contact portion is separated from the installation surface 40 or when the drum body support unit 5 is in the first position P1, the drum body support unit 5 can be firmly fixed to the apparatus main body 2 regardless of the state of the installation surface 40. Therefore, the printing apparatus 1 of the present embodiment can simply dispose the drum body at the correct position.

[0052] In addition, as described above, the "drum body" means that it can be either the drum body R1 of the medium M on which printing is to be started from now on or the drum body R2 formed by winding the printed medium M. Therefore, although the drum body support unit 5 of the present embodiment is configured to hold the drum body R2 formed by winding the medium M by the holding member 4, it may be configured to include, in addition to the holding member 3 as the unwinding unit of the medium M instead of the holding member 4, a drum body support unit having the same structure as the drum body support unit 5.

[0053] In addition, as Figures 2 to 4 shown, in the printing apparatus 1 of the present embodiment, the drum body support unit 5 has a second shaft member 7 as a fixed portion at a position where the drum body support unit 5 does not contact the apparatus main body 2 when the drum body support unit 5 is in the first position P1 and at a position different from the first shaft member 6 in the Z-axis direction corresponding to the vertical direction. The second shaft member 7 is fixed to the fixing portion 31 when the drum body support unit 5 is in the second position P2. Therefore, in the printing apparatus 1 of the present embodiment, in the second position P2, the drum body support unit 5 can be firmly fixed to the apparatus main body 2 by the fixing portion 31 and the second shaft member 7 in addition to the support portion 30 and the first shaft member 6. Further, as Figure 3As shown, since the second shaft member 7 is in a position where it does not contact the apparatus main body 2 when the drum body support unit 5 is in the first position P1, when the printing apparatus 1 of the present embodiment moves the drum body support unit 5 along the installation surface 40 closer to the apparatus main body 2 so that the support portion 30 supports the first shaft member 6, it is possible to suppress the second shaft member 7 from interfering with the apparatus main body 2.

[0054] In addition, specifically, as Figures 2 to 4 shown, the second shaft member 7 is disposed at a position above the first shaft member 6 in the vertical direction. With such a structure, when the drum body support unit 5 is displaced from the Figure 3 shown first position P1 to the Figure 4 shown second position P2, by performing a simple operation of the operator applying body weight to push the fixing portion 31 downward, the operability of the operator is improved, and the load when displacing the drum body support unit 5 from the first position P1 to the second position P2 can be reduced.

[0055] Furthermore, as Figures 2 to 4 shown, the printing apparatus 1 of the present embodiment includes a sensor 34 at the fixing portion 31 of the apparatus main body 2, and the sensor 34 detects whether the second shaft member 7 is in a position fixed to the fixing portion 31. Therefore, it is possible to suppress a situation where the printing operation starts with the drum body support unit 5 not in the second position P2 which is the standard position. In addition, since it is also possible to detect a situation where the drum body R2 is disposed at the correct position, an image can be formed at the correct position with respect to the medium M. Although the sensor 34 of the present embodiment is configured to detect whether the second shaft member 7 is in a position fixed to the fixing portion 31 by contacting the second shaft member 7, it is not limited to such a structure, and an optical sensor or the like that can detect the presence or absence of the second shaft member 7 in a non-contact manner with respect to the second shaft member 7 may also be used.

[0056] Furthermore, as Figure 5 shown, the printing apparatus 1 of the present embodiment includes an abutting portion 33 in the leg portion 10 of the apparatus main body 2, and the abutting portion 33 abuts against the first shaft member 6 during installation when the first shaft member 6 is installed relative to the support portion 30 by moving the drum body support unit 5 relative to the apparatus main body 2 in the installation direction D1. Therefore, the printing apparatus 1 of the present embodiment can abut against the abutting portion 33 to position the drum body support unit 5 relative to the apparatus main body 2, and thus it is possible to easily position the drum body support unit 5 relative to the apparatus main body 2.

[0057] Furthermore, as Figure 5As shown, in the foot portion 10, an abutting portion 33 is formed at a position where it can contact the first shaft member 6. The interval in the Z-axis direction of the two abutting portions 33 becomes narrower as it progresses toward the -Y direction side. Moreover, the interval in the X-axis direction between the two abutting portions 33 becomes narrower as it progresses toward the -Y direction side. That is, in the printing apparatus 1 of the present embodiment, a guiding structure for guiding the first shaft member 6 to the support portion 30 when the first shaft member 6 is mounted relative to the support portion 30 is formed on the abutting portion 33. Therefore, the printing apparatus 1 of the present embodiment can particularly easily position the drum body support unit 5 relative to the apparatus main body 2. However, the structure of the abutting portion 33 is not limited to the structure of the present embodiment. The guiding structure may not be formed on the abutting portion 33, and the position of the abutting portion 33 is not limited to a configuration that abuts against the end portion of the first shaft member 6.

[0058] In addition, as Figures 2 to 4 shown, in the printing apparatus 1 of the present embodiment, the drum body support unit 5 has a wheel 9A as a first contact portion and a wheel 9B as a second contact portion as contact portions, that is, wheels 9. Moreover, as Figure 3 shown, in the mounting direction D1 in which the drum body support unit 5 approaches the apparatus main body 2 along the moving direction D, the first shaft member 6, the wheel 9A, the holding member 4, and the wheel 9B are arranged in order from the leading side. Therefore, the printing apparatus 1 of the present embodiment sandwiches and holds the holding member 4 by using the wheel 9A and the wheel 9B, thereby improving the stability of the drum body support unit 5, and by arranging the first shaft member 6 at the leading side in the mounting direction D1, the operability when the drum body support unit 5 is displaced from Figure 3 the first position P1 shown to Figure 4 the second position P2 shown is improved.

[0059] Embodiment 2

[0060] Next, the printing apparatus 1 of Embodiment 2 will be described by using Figure 6 . In addition, Figure 6 is a diagram corresponding to Figure 4 in the printing apparatus 1 of Embodiment 1. In Figure 6 , structural components common to the above-described Embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Here, the printing apparatus 1 of the present embodiment has the same shape as the printing apparatus 1 of Embodiment 1 except for the structure of the wheel 9 as a contact portion. Therefore, the printing apparatus 1 of the present embodiment has the same features as the printing apparatus 1 of Embodiment 1 except for the parts described below.

[0061] As Figure 6As shown, in the printing apparatus 1 of the present embodiment, a spring member S is provided on the wheel 9. Therefore, even when the drum support unit 5 is in the second position, the wheel 9 and the installation surface 40 are in contact with each other. With such a structure, the second position P2 is a position where, although the wheel 9 does not separate from the installation surface 40 as in the printing apparatus 1 of Embodiment 1, the force applied from the wheel 9 to the installation surface 40 is reduced compared to when the drum support unit 5 is in the first position P1. From another perspective, the wheel 9 bears a part of the force applied from the drum support unit 5 to the installation surface 40 at the second position P2. Therefore, compared to the printing apparatus 1 of Embodiment 1, the load generated by the drum support unit 5 applied to the apparatus main body 2 such as the feet 10 is reduced.

[0062] The present invention is not limited to the above embodiments, and can be implemented using various structures without departing from its gist. For example, in order to solve part or all of the above problems, or to achieve part or all of the above effects, the technical features of the embodiments corresponding to the technical features in each mode described in the section of the invention content can be appropriately replaced or combined. In addition, as long as the technical feature is not described as an essential technical feature in this specification, it can be appropriately deleted.

[0063] Reference Signs

[0064] 1... printing apparatus; 2... apparatus main body; 3... holding member; 4... holding member; 5... drum support unit; 6... first shaft member (shaft member); 7... second shaft member (fixed portion); 8... base portion; 9... wheel (contact portion); 9A... wheel (first contact portion); 9B... wheel (second contact portion); 10... feet; 10A... feet; 10B... feet; 11... frame portion; 12... heater; 13... guide rail; 14... frame; 15... conveying roller pair; 16... carriage; 17... drive roller; 18... driven roller; 19... head (printing portion); 20... medium support portion; 21... tension rod; 30... support portion; 30A... support portion; 30B... support portion; 31... fixing portion; 32... protruding portion; 33... abutting portion; 33A... abutting portion; 33B... abutting portion; 34... sensor; 40... installation surface; A... conveying direction; B... reel direction; C... rotation direction; D... moving direction; D1... installation direction; D2... detachment direction; E... moving direction; E1... fixing direction; E2... opening direction; F... rotation direction; F1... rotation direction; F2... rotation direction; M... medium; P1... first position; P2... second position; R1... drum body; R2... drum body; S... spring member.

Claims

1. A printing device, characterized in that, Comprising: A device main body having a printing unit for printing on a medium; A drum body support unit that can move along the installation surface of the device main body in a moving direction intersecting the axial direction of the drum body of the drum as the medium while holding the drum body; The drum body support unit comprises: A holding member that rotatably holds the drum body; A contact portion that contacts the installation surface; A shaft member that extends along the axial direction at a position above the contact portion in the vertical direction; The device main body comprises: A support portion that supports the shaft member; A fixing portion that fixes the drum body support unit; The shaft member can be disassembled and assembled relative to the support portion by moving the drum body support unit relative to the device main body in the moving direction; The drum body support unit can rotate to a first position and a second position with the shaft member as a reference in a state where the shaft member is supported by the support portion; The first position is a position where the shaft member is installed relative to the support portion by the drum body support unit approaching the device main body along the moving direction; The second position is a position where the device main body fixes the drum body support unit through the fixing portion, and is a position where the contact portion separates from the installation surface or the force applied from the contact portion to the installation surface is reduced compared to when the drum body support unit is in the first position.

2. The printing device according to claim 1, wherein: The drum body support unit has a fixed portion at a position where it does not contact the device main body when the drum body support unit is in the first position and at a position different from the shaft member in the vertical direction, and the fixed portion is fixed to the fixing portion when the drum body support unit is in the second position.

3. The printing device according to claim 2, wherein: The fixed portion is provided at a position above the shaft member in the vertical direction.

4. The printing device according to claim 2 or 3, wherein: The device main body has a sensor that detects whether the fixed portion is in a position fixed to the fixing portion.

5. The printing device according to claim 1, wherein: The device main body has an abutting portion that abuts against the shaft member during installation when the shaft member is installed relative to the support portion by the drum body support unit approaching the device main body along the moving direction.

6. The printing device according to claim 5, wherein: A guiding structure is formed on the abutting portion, and the guiding structure guides the shaft member to the support portion during the installation.

7. The printing device according to claim 1, wherein: The drum body support unit has a first contact portion and a second contact portion as the contact portions. In the direction in which the drum body support unit approaches the device main body along the moving direction, the shaft member, the first contact portion, the holding member, and the second contact portion are arranged in order from the head side.

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