SHEET FEEDING APPARATUS AND ROLL EXCHANGE METHOD

Abstract

To properly replace a roll on which a sheet is wound to wipe a discharge port of a discharge device.SOLUTION: A sheet supply device includes a roll on which a sheet is wound to wipe a discharge port of a discharge device, a lever provided to be made possible to swing and in contact with the surface of the sheet wound on the roll, and a fixing mechanism which blocks a supply path for a sheet drawn from the roll by the lever by fixing the lever to a retreat location located away from the roll and opens the supply path by releasing the lever fixed at the retreat location.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a sheet supply device that supplies a sheet for wiping a discharge port of a discharge device from a roll, and a method for replacing the roll.

Background Art

[0002] The following patent documents describe a technique for supplying a sheet from a roll around which the sheet is wound.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] This specification aims to appropriately replace a roll around which a sheet for wiping a discharge port of a discharge device is wound.

Means for Solving the Problems

[0005] To solve the above problems, this specification discloses a sheet supply device including a roll around which a sheet for wiping a discharge port of a discharge device is wound, a lever that is swingably disposed and contacts the surface of the sheet wound around the roll, and a fixing mechanism that closes a supply path of the sheet drawn from the roll by the lever by fixing the lever at a retracted position away from the roll, and opens the supply path by releasing the fixing of the lever at the retracted position.

[0006] Also, in order to solve the above problems, this specification discloses a roll replacement method for a sheet feeding device including a roll around which a sheet is wound and a lever that contacts the sheet by swinging toward the surface of the sheet wound around the roll. The method includes: a fixing step of closing a supply path of the sheet drawn from the roll with the lever by fixing the lever at a retracted position away from the roll; a replacement step of replacing the roll while the lever is fixed at the retracted position; and a release step of releasing the fixing of the lever at the retracted position after the replacement of the roll in the replacement step is completed, thereby opening the supply path.

Advantages of the Invention

[0007] In the present disclosure, by fixing the lever at a retracted position away from the roll, the supply path of the sheet drawn from the roll is blocked by the lever, and by releasing the fixing of the lever at the retracted position, the supply path is opened. Therefore, for example, when an operator retracts the lever to the retracted position during roll replacement, if the supply path of the sheet is blocked by the lever after roll replacement, the operator can be alerted to the omission of releasing the lever. This enables appropriate roll replacement.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0009] FIG. 1 shows a circuit forming apparatus 10. The circuit forming apparatus 10 includes a transfer device 20, a first shaping unit 22, a second shaping unit 24, a cleaning unit 26, and a control device (see FIG. 4) 28. The transfer device 20, the first shaping unit 22, the second shaping unit 24, and the cleaning unit 26 are arranged on a base 29 of the circuit forming apparatus 10. The base 29 generally has a rectangular shape. In the following description, the longitudinal direction of the base 29 is referred to as the X-axis direction, the short-side direction of the base 29 is referred to as the Y-axis direction, and the direction orthogonal to both the X-axis direction and the Y-axis direction is referred to as the Z-axis direction.

[0010] The transfer device 20 includes an X-axis slide mechanism 30 and a Y-axis slide mechanism 32. The X-axis slide mechanism 30 has an X-axis slide rail 34 and an X-axis slider 36. The X-axis slide rail 34 is disposed on the base 29 so as to extend in the X-axis direction. The X-axis slider 36 is slidably held in the X-axis direction by the X-axis slide rail 34. Further, the X-axis slide mechanism 30 has an electromagnetic motor (see FIG. 4) 38, and by driving the electromagnetic motor 38, the X-axis slider 36 moves to an arbitrary position in the X-axis direction. The Y-axis slide mechanism 32 has a Y-axis slide rail 50 and a table 52. The Y-axis slide rail 50 is disposed on the base 29 so as to extend in the Y-axis direction and is movable in the X-axis direction. One end of the Y-axis slide rail 50 is connected to the X-axis slider 36. The table 52 is slidably held on the Y-axis slide rail 50 in the Y-axis direction. Further, the Y-axis slide mechanism 32 has an electromagnetic motor (see FIG. 4) 56, and by driving the electromagnetic motor 56, the table 52 moves to an arbitrary position in the Y-axis direction. Thereby, the table 52 moves to an arbitrary position on the base 29 by driving the X-axis slide mechanism 30 and the Y-axis slide mechanism 32.

[0011] The table 52 has a base 60, a holding device 62, and a lifting device (see FIG. 4) 64. The base 60 is formed in a flat plate shape, and a pallet (see FIG. 5) 70 is placed on the upper surface. The holding device 62 is provided on both sides of the base 60 in the X-axis direction. The two edge portions of the pallet 70 placed on the base 60 in the X-axis direction are clamped by the holding device 62, so that the pallet 70 is fixedly held. The lifting device 64 is disposed below the base 60 and raises and lowers the base 60.

[0012] The first shaping unit 22 is a unit for shaping the wiring of a circuit board, and includes a first printing unit 72 and a firing unit 74. The first printing unit 72 has an inkjet head (see FIG. 4) 76, and the inkjet head 76 discharges metal ink linearly. The metal ink is one in which metal nanoparticles of nanometer size, such as silver, are dispersed in a solvent. The surface of the metal nanoparticles is coated with a dispersant to prevent aggregation in the solvent. Also, the inkjet head 76 discharges metal ink from a plurality of nozzles by, for example, a piezo method using a piezoelectric element.

[0013] The firing unit 74 has an infrared irradiation device (see FIG. 4) 78. The infrared irradiation device 78 is a device that irradiates the discharged metal ink with infrared rays, and the metal ink irradiated with infrared rays is fired to form wiring. Note that the firing of the metal ink is a phenomenon in which, by applying energy, vaporization of the solvent, a protective film of metal nanoparticles, that is, decomposition of the dispersant, etc. are performed, and the metal nanoparticles come into contact or fuse, resulting in an increase in conductivity. And when the metal ink is fired, a metal wiring is formed.

[0014] Also, the second shaping unit 24 is a unit for shaping the resin layer of a circuit board, and includes a second printing unit 84 and a curing unit 86. The second printing unit 84 has an inkjet head (see FIG. 4) 88, and the inkjet head 88 discharges an ultraviolet curable resin. The ultraviolet curable resin is a resin that cures by irradiation with ultraviolet rays. Note that the inkjet head 88 may be, for example, a piezo method using a piezoelectric element, or a thermal method that heats the resin to generate bubbles and discharges from a plurality of nozzles.

[0015] The curing unit 86 has a flattening device (see FIG. 4) 90 and an irradiation device (see FIG. 4) 92. The flattening device 90 flattens the upper surface of the ultraviolet curable resin discharged by the inkjet head 88. For example, while leveling the surface of the ultraviolet curable resin, the excess resin is scraped off by a roller or a blade to make the thickness of the ultraviolet curable resin uniform. Further, the irradiation device 92 includes a mercury lamp or an LED as a light source, and irradiates the discharged ultraviolet curable resin with ultraviolet rays. Thereby, the discharged ultraviolet curable resin is cured, and a resin layer is formed.

[0016] The cleaning unit 26 is a unit that cleans the inkjet head 76 of the first shaping unit 22 and the inkjet head 88 of the second shaping unit 24, and has a cleaning part 100 and a moving part 102. The moving part 102 has a moving device (see FIG. 4) 106. The moving device 106 moves the inkjet head 76 between the first shaping unit 22 and the cleaning unit 26, and moves the inkjet head 88 between the second shaping unit 24 and the cleaning unit 26.

[0017] As shown in FIGS. 2 and 3, the cleaning part 100 has a wipe roll 110, a reel 112, first to seventh auxiliary rollers 114 to 126, a pressing block 128, and a gear mechanism 130. The wipe roll 110 is composed of a short cylindrical shaft center 136 and a belt-shaped wipe sheet 138 wound around the shaft center 136. Further, the reel 112 is composed of a reel body 140, a support shaft 142, and a reel cover 144. The reel body 140 has a disk shape and is fixed to the side surface of the apparatus body 146. The support shaft 142 is coaxially fixed to the center of the reel body 140. The reel cover 144 has a disk shape substantially the same size as the reel body 140, and is detachably attached coaxially to the tip of the support shaft 142 at the center of the reel cover 144. Then, by inserting the support shaft 142 of the reel 112 into the inside of the shaft center 136 of the wipe roll 110, the wipe roll 110 is rotatably supported by the reel 112.

[0018] The first to seventh auxiliary rollers 114 to 126 are rotatably supported in a posture parallel to the axis of the support shaft 142 on the side surface of the apparatus main body 146 where the reel main body 140 is fixed. The first auxiliary roller 114 and the second auxiliary roller 116 are arranged side by side in the left - right direction at substantially the same height above the reel 112. Further, the third auxiliary roller 118 is arranged above the second auxiliary roller 116. Here, the direction from the first auxiliary roller 114 toward the second auxiliary roller 116 is described as the left direction, and the direction from the second auxiliary roller 116 toward the first auxiliary roller 114 is described as the right direction.

[0019] On the left side of the second auxiliary roller 116 and the third auxiliary roller 118, a pressing block 128 is arranged. The pressing block 128 moves up and down by the drive of an electromagnetic motor (see FIG. 4) 150 and vibrates in the left - right direction by the drive of an electromagnetic motor (see FIG. 4) 152. The fourth auxiliary roller 120 is arranged at the same height as the third auxiliary roller 118 on the opposite side of the third auxiliary roller 118 with the pressing block 128 interposed therebetween. The fifth auxiliary roller 122 is arranged below the fourth auxiliary roller 120. The sixth auxiliary roller 124 is arranged obliquely downward on the left side of the fifth auxiliary roller 122. The seventh auxiliary roller 126 is arranged on the right side of the sixth auxiliary roller 124. Further, the gear mechanism 130 is composed of a pair of gears 154, 156. The pair of gears 154, 156 are arranged side by side in the left - right direction and are meshed with each other. And one of the pair of gears 154, 156 rotates by the drive of an electromagnetic motor (see FIG. 4) 158.

[0020] The ejection ports of the inkjet heads 76 and 88 are cleaned by the cleaning unit 100 having such a structure. Specifically, one end of the wipe sheet 138 is pulled out from the wipe roll 110 supported by the reel 112, wound around the first auxiliary roller 114, and extends leftward. One end of the wipe sheet 138 is wound around the second auxiliary roller 116 and extends upward, and then wound around the third auxiliary roller 118 and extends leftward. Then, one end of the wipe sheet 138 is wound around the fourth auxiliary roller 120 and extends downward, and then wound around the fifth auxiliary roller 122 and extends downward and leftward. Further, one end of the wipe sheet 138 is wound around the sixth auxiliary roller 124 and extends rightward, and then wound around the seventh auxiliary roller 126 and extends downward. Then, one end of the wipe sheet 138 extends downward through between the pair of gears 154 and 156. Therefore, when one of the pair of gears 154 and 156 rotates by the operation of the electromagnetic motor 158, the wipe sheet 138 is fed from the wipe roll 110 toward the gear mechanism 130. At this time, the wipe sheet 138 passes above the pressing block 128 disposed between the third auxiliary roller 118 and the fourth auxiliary roller 120.

[0021] Further, a plurality of ejection ports (not shown) for ejecting metal ink and ultraviolet curable resin are formed on the lower surfaces of the inkjet heads 76 and 88. For this reason, the inkjet heads 76 and 88 move upward between the third auxiliary roller 118 and the fourth auxiliary roller 120 by the operation of the moving device 106. Then, the pressing block 128 rises by the drive of the electromagnetic motor 150, lifts the wiping sheet 138, and presses it against the lower surface of the inkjet heads 76 and 88. For this reason, the wiping sheet 138 lifted by the pressing block 128 is pressed against the plurality of ejection ports of the inkjet heads 76 and 88. Subsequently, the pressing block 128 vibrates in the left - right direction by the drive of the electromagnetic motor 152. For this reason, the pressing block 128 rises and vibrates while pressing the wiping sheet 138 against the plurality of ejection ports of the inkjet heads 76 and 88, so that the plurality of ejection ports are wiped by the wiping sheet 138. In this way, in the cleaning unit 100, the ejection ports of the inkjet heads 76 and 88 are cleaned by the wiping sheet 138.

[0022] Also, as shown in FIG. 4, the control device 28 includes a controller 160, a plurality of drive circuits 162, and a control circuit 164. The plurality of drive circuits 162 are connected to the electromagnetic motors 38, 56, 150, 152, 158, the holding device 62, the lifting device 64, the inkjet head 76, the infrared irradiation device 78, the inkjet head 88, the flattening device 90, the irradiation device 92, and the moving device 106. The controller 160 includes a CPU, a ROM, a RAM, etc., and is mainly a computer, and is connected to the plurality of drive circuits 162. Thereby, the operations of the conveying device 20, the first shaping unit 22, the second shaping unit 24, and the cleaning unit 26 are controlled by the controller 160. Also, the controller 160 is connected to the display device 166 via the control circuit 164. Thereby, the controller 160 displays an arbitrary image on the display device 166.

[0023] In the circuit forming device 10, with the above-described configuration, a resin laminate is formed on the pallet 70 placed on the base 60 of the table 52, and wiring is formed on the upper surface of the resin laminate, thereby forming a circuit board.

[0024] Specifically, when the pallet 70 is set on the base 60 of the table 52, the table 52 moves below the second shaping unit 24. Then, in the second shaping unit 24, as shown in FIG. 5, a resin laminate 170 is formed on the pallet 70. The resin laminate 170 is formed by repeating the ejection of the ultraviolet curable resin from the inkjet head 88 and the irradiation of ultraviolet rays by the irradiation device 92 to the ejected ultraviolet curable resin.

[0025] Specifically, in the second printing unit 84 of the second shaping unit 24, the inkjet head 88 ejects the ultraviolet curable resin in a thin film shape onto the upper surface of the pallet 70. Subsequently, when the ultraviolet curable resin is ejected in a thin film shape, in the curing unit 86, the ultraviolet curable resin is flattened by the flattening device 90 so that the film thickness of the ultraviolet curable resin becomes uniform. Then, the irradiation device 92 irradiates the thin film-shaped ultraviolet curable resin with ultraviolet rays. Thereby, a thin film-shaped resin layer 172 is formed on the pallet 70.

[0026] Subsequently, the inkjet head 88 ejects the ultraviolet curable resin in a thin film shape onto the thin film-shaped resin layer 172. Then, the thin film-shaped ultraviolet curable resin is flattened by the flattening device 90, and the irradiation device 92 irradiates the ejected thin film-shaped ultraviolet curable resin with ultraviolet rays, whereby a thin film-shaped resin layer 172 is laminated on the thin film-shaped resin layer 172. In this way, the ejection of the ultraviolet curable resin onto the thin film-shaped resin layer 172 and the irradiation with ultraviolet rays are repeated, and a plurality of resin layers 172 are laminated, thereby forming the resin laminate 170.

[0027] Next, when the resin laminate 170 is formed, the table 52 moves below the first shaping unit 22. Then, in the first printing section 72 of the first shaping unit 22, as shown in FIG. 6, the inkjet head 76 linearly discharges the metal ink 176 onto the upper surface of the resin laminate 170 according to the circuit pattern. Subsequently, infrared rays are irradiated by the infrared irradiation device 78 in the firing section 74 of the first shaping unit 22 onto the metal ink 176 discharged according to the circuit pattern. As a result, the metal ink 176 is fired, and the wiring 178 is formed on the upper surface of the resin laminate 170.

[0028] In this way, the resin laminate 170 is shaped by the ultraviolet curable resin discharged by the inkjet head 88 in the second shaping unit 24, and the wiring 178 is shaped by the metal ink discharged by the inkjet head 76 in the first shaping unit 22, thereby forming a circuit board. Then, since the discharge state deteriorates due to the repeated discharge of the ultraviolet curable resin and the metal ink from the inkjet heads 76 and 88, the ejection ports of the inkjet heads 76 and 88 are cleaned in the cleaning unit 26.

[0029] Specifically, in the cleaning section 100 of the cleaning unit 26, as described above, by raising the pressing block 128, the wiping sheet 138 is lifted by the pressing block 128 and pressed against the lower surfaces of the inkjet heads 76 and 88. Then, while the pressing block 128 is in the raised state and vibrating, the lower surfaces of the inkjet heads 76 and 88 are wiped by the wiping sheet 138, thereby cleaning the ejection ports of the inkjet heads 76 and 88. Note that since the wiping sheet 138 gets dirty by cleaning the ejection ports, each time the ejection ports are cleaned by the wiping sheet 138, a predetermined amount of the wiping sheet 138 is fed from the wiping roll 110 toward the gear mechanism 130 by the drive of the electromagnetic motor 158.

[0030] In this way, each time the cleaning by the wiping sheet 138 is executed, a predetermined amount of the wiping sheet When 138 is sent out from the wipe roll 110, the amount of the wipe sheet 138 wound around the wipe roll 110 decreases. For this reason, a detection mechanism (see FIGS. 3 and 7) 180 for detecting the amount of the wipe sheet 138 wound around the wipe roll 110 is provided in the cleaning unit 100.

[0031] As shown in FIGS. 3 and 7, the detection mechanism 180 is composed of a lever 182, a detected object 184, a first detection sensor 186, and a second detection sensor 188. The lever 182 is generally rod-shaped and is formed of an iron material. One end of the lever 182 is fixed to a lever shaft 190 disposed parallel to the support shaft 142 above the support shaft 142 of the reel 112. The lever shaft 190 is rotatably held by the apparatus main body 146 around the axis of the lever shaft 190. The lever 182 swings around the lever shaft 190, and the lever shaft 190 rotates as the lever 182 swings. In addition, a contact roller 191 is disposed at the other end of the lever 182 so as to be rotatable around an axis parallel to the axis of the lever shaft 190. For this reason, the weight on the other end side of the lever 182 becomes heavier than the weight on the one end side of the lever 182, and the other end of the lever 182 swings downward due to its own weight. For this reason, as shown in FIG. 8, the contact roller 191 disposed at the other end of the lever 182 contacts the surface of the wipe sheet 138 wound around the wipe roll 110.

[0032] Also, as shown in FIGS. 3 and 7, the lever shaft 190 fixed to one end of the lever 182 penetrates the apparatus main body 146 and extends to the side surface of the apparatus main body 146 opposite to the side surface where the reel 112 and the like are disposed. The object to be detected 184 is generally annular, and the object to be detected 184 is coaxially fixed to the end of the lever shaft 190 that extends to the side surface of the apparatus main body 146 opposite to the side surface where the reel 112 and the like are disposed. Thus, when the lever shaft 190 rotates as the lever 182 swings, the object to be detected 184 also rotates together with the lever shaft 190. As shown in FIG. 8, two notches 192 and 194 are formed in the generally annular object to be detected 184, and a first annular portion 196 and a second annular portion 198 are disposed between the two notches 192 and 194 in the circumferential direction of the object to be detected 184. Note that in FIG. 8, the object to be detected 184, the first detection sensor 186, and the second detection sensor 188 are shown in a state of passing through the apparatus main body 146.

[0033] Also, the first detection sensor 186 and the second detection sensor 188 are transmissive sensors and are generally U-shaped as shown in FIG. 9. The first detection sensor 186 and the second detection sensor 188 are each composed of a light projecting portion 200 and a light receiving portion 202 disposed opposite to each other, and the light irradiated from the light projecting portion 200 is received by the light receiving portion 202. Further, the first detection sensor 186 and the second detection sensor 188 are disposed such that the object to be detected 184 is positioned between the light projecting portion 200 and the light receiving portion 202. As the object to be detected 184 rotates, one of the notch 192, the notch 194, the first annular portion 196, and the second annular portion 198 is positioned between the light projecting portion 200 and the light receiving portion 202. For this reason, for example, when the first annular portion 196 or the second annular portion 198 is positioned between the light projecting portion 200 and the light receiving portion 202, the light irradiated from the light projecting portion 200 is blocked by the first annular portion 196 or the second annular portion 198, and thus the light receiving portion 202 does not receive the light irradiated by the light projecting portion 200. On the other hand, when the notch 192 or the notch 194 is positioned between the light projecting portion 200 and the light receiving portion 202, the light receiving portion 202 receives the light irradiated from the light projecting portion 200.

[0034] Further, as shown in FIG. 8, the first detection sensor 186 and the second detection sensor 188 are disposed in a contrasting manner with the lever shaft 190 interposed therebetween. When a large amount of the wipe sheet 138 is wound around the wipe roll 110 and the contact roller 191 of the lever 182 contacts the surface of the wipe sheet 138, the cutouts 192 and 194 of the object to be detected 184 are positioned between the light projecting portion 200 and the light receiving portion 202 of the first detection sensor 186 and the second detection sensor 188. For this reason, a large amount of the wipe sheet 138 is wound around the wipe roll 110 In this case, in the first detection sensor 186 and the second detection sensor 188, the light receiving portion 202 receives the light irradiated from the light projecting portion 200. That is, when the reception of light is detected by the first detection sensor 186 and the second detection sensor 188, a large amount of the wipe sheet 138 remains on the wipe roll 110.

[0035] Also, when the wiping sheet 138 wound around the wipe roll 110 becomes less than the set amount as the wiping sheet 138 is used, as shown in FIG. 10, the lever 182 swings. At this time, as the lever 182 swings, the detected object 184 rotates, and the second annular portion 198 of the detected object 184 is positioned between the light projecting portion 200 and the light receiving portion 202 of the first detection sensor 186, and the notch portion 192 of the detected object 184 is positioned between the light projecting portion 200 and the light receiving portion 202 of the second detection sensor 188. For this reason, when the wiping sheet 138 wound around the wipe roll 110 becomes less than the set amount, in the first detection sensor 186, the light receiving portion 202 does not receive the light irradiated from the light projecting portion 200, and in the second detection sensor 188, the light receiving portion 202 receives the light irradiated from the light projecting portion 200. That is, when the reception of light is not detected by the first detection sensor 186 and the reception of light is detected by the second detection sensor 188, the wiping sheet 138 wound around the wipe roll 110 is less than the set amount. The set amount is set to a value less than the amount of the wiping sheet 138 required when cleaning the inkjet heads 76 and 88 once using the wiping sheet 138. For this reason, when the reception of light is not detected by the first detection sensor 186 and the reception of light is detected by the second detection sensor 188, it is necessary to replace the wipe roll attached to the reel 112 with a new wipe roll.

[0036] Also, when the wiping sheet 138 wound around the wipe roll 110 runs out as the wiping sheet 138 is used, as shown in FIG. 11, the lever 182 swings. At this time, as the lever 182 swings, the detected object 184 rotates, and the second annular portion 198 of the detected object 184 is positioned between the light projecting portion 200 and the light receiving portion 202 of the first detection sensor 186, and the first annular portion 196 of the detected object 184 is positioned between the light projecting portion 200 and the light receiving portion 202 of the second detection sensor 188. For this reason, when the wiping sheet 138 wound around the wipe roll 110 runs out, in the first detection sensor 186 and the second detection sensor 188, the light receiving portion 202 does not receive the light irradiated from the light projecting portion 200. That is, when the non-reception of light is not detected by the first detection sensor 186 and the second detection sensor 188, the wiping sheet 138 wound around the wipe roll 110 has run out.

[0037] As described above, the first detection sensor 186 and the second detection sensor 188 can detect the amount of the wiping sheet 138 wound around the wipe roll 110 based on the rotation angle of the detected object 184, that is, the swing angle of the lever 182. Therefore, when the controller 160 does not detect the reception of light by the first detection sensor 186 and detects the reception of light by the second detection sensor 188, the controller 160 displays a guidance screen on the display device 166. A comment prompting the replacement of the wipe roll is displayed on this guidance screen. Also, when the controller 160 does not detect the reception of light by the first detection sensor 186 and the second detection sensor 188, the controller 160 displays an error screen on the display device 166. A comment prompting that the wipe roll has run out is displayed on this error screen.

[0038] When the operator checks the guidance screen or the error screen, the operator performs the wiper roll replacement operation. That is, the operator removes the reel cover 144 of the reel 112 from the reel body 140 and removes the wiper roll 110 from the support shaft 142. Then, after the operator attaches a new wiper roll to the support shaft 142, the operator attaches the reel cover 144 to the reel body 140. However, since the lever 182 always swings in the direction approaching the reel 112 due to its own weight, the lever 182 becomes an obstacle when attaching the wiper roll. Therefore, when the operator attaches a new wiper roll to the support shaft 142, the operator needs to swing the lever 182 to a position where it does not interfere with the attachment of the new wiper roll (hereinafter referred to as the "retracted position"). That is, when the operator attaches a new wiper roll to the support shaft 142, the operator needs to swing the lever 182 in the direction away from the reel 112 and maintain it in the retracted position. For this reason, for example, the operator needs to swing the lever 182 to the retracted position with the left hand and attach the new wiper roll to the support shaft 142 with the right hand, resulting in very poor workability. There is a need to swing the lever 182 to a position where it does not interfere with the attachment of the new wiper roll (hereinafter referred to as the "retracted position"). That is, when the operator attaches a new wiper roll to the support shaft 142, the operator needs to swing the lever 182 in the direction away from the reel 112 and maintain it in the retracted position. For this reason, for example, the operator needs to swing the lever 182 to the retracted position with the left hand and attach the new wiper roll to the support shaft 142 with the right hand, resulting in very poor workability.

[0039] Therefore, in the cleaning unit 100, as shown in FIG. 12, a magnet 210 is disposed in the upper left direction of the reel 112 and to the left of the lever shaft 190. For this reason, when replacing the wiper roll, when the operator swings the lever 182, which is formed of an iron material, until it contacts the magnet 210, the lever 182 is attracted to the magnet 210 and held in the retracted position. For this reason, it is no longer necessary for the operator to hold the lever 182 in the retracted position when replacing the wiper roll. As a result, the operator can attach the wiper roll with both hands, improving workability.

[0040] Then, when the roll replacement is completed, the operator swings the lever 182 toward the reel 112 to remove it from the magnet 210 and brings the contact roller 191 of the lever 182 into contact with the wipe sheet 138 of the wipe roll mounted on the reel 112. Thereby, the remaining amount of the wipe roll newly mounted on the reel 112 can be detected by the detection mechanism 180. However, there is a case where the operator may forget to swing the lever 182 to remove it from the magnet 210 after completing the roll replacement. That is, there is a case where the operator may forget to return the lever 182 after completing the roll replacement. In such a case, the remaining amount of the wipe roll newly mounted on the reel 112 cannot be detected by the detection mechanism 180, and there is a risk of the sheet running out during cleaning with the wipe sheet.

[0041] In view of such a situation, in the cleaning unit 100, when the lever 182 is fixed at the retracted position by the magnet 210, the supply path of the wiper sheet is blocked by the lever 182, thereby preventing the operator from forgetting to return the lever 182. Specifically, when an operator mounts a new wiper roll on the reel 112, the operator pulls out one end of the wiper sheet from the wiper roll, winds it around the first auxiliary roller 114, and directs it leftward. Then, the operator winds one end of the wiper sheet 138 around the second auxiliary roller 116. However, the lever 182 fixed by the magnet 210 at the retracted position contacts the second auxiliary roller 116, and the supply path of the wiper sheet is blocked by the lever 182. Therefore, the operator cannot wind the wiper sheet around the second auxiliary roller 116 and notices the lever 182 fixed at the retracted position. As a result, the operator can recognize the omission of returning the lever 182 and can prevent the omission of returning the lever 182 by swinging the lever 182 to remove it from the magnet 210. When the lever 182 is removed from the magnet 210, that is, when the fixing of the lever 182 is released, as shown in FIG. 13, the lever 182 moves away from the second auxiliary roller 116, and the supply path of the wiper sheet is opened. As a result, the operator winds the wiper sheet around the second auxiliary roller 116 and further winds it around the third to seventh auxiliary rollers 118 to 126 and passes it between the pair of gears 154 and 156, whereby the wiper sheet is set in the cleaning unit 100.

[0042] Also, when an operator replaces the wipe roll, one end of the wipe sheet may be pulled out from the wipe roll newly mounted on the reel 112, and one end of the wipe sheet may be spliced to the end of the wipe sheet remaining in the cleaning unit 100. That is, in the state where the wipe sheet of the wipe roll (hereinafter referred to as "old sheet") mounted on the reel 112 before the replacement of the wipe roll is set in the cleaning unit 100, that is, in the state where it is wound around the first to seventh auxiliary rollers 114 to 126, the old sheet may be cut between the reel 112 and the first auxiliary roller 114. Then, after the operator replaces the wipe roll, one end of the wipe sheet is pulled out from the wipe roll newly mounted on the reel 112 and one end of the wipe sheet may be spliced to the end of the old sheet. In such a case, since the operator does not wind the wipe sheet around the second auxiliary roller 116, the operator does not notice the lever 182 fixed at the retracted position.

[0043] In view of such a situation, in the cleaning unit 100, the lever 182 fixed by the magnet 210 at the retracted position is detected by the detection mechanism 180. Specifically, as shown in FIG. 14, when the lever 182 is fixed by the magnet 210 at the retracted position, the second annular portion 198 of the detected object 184 is located between the light projecting portion 200 and the light receiving portion 202 of the second detection sensor 188, and the notch portion 194 of the detected object 184 is located between the light projecting portion 200 and the light receiving portion 202 of the first detection sensor 186. For this reason, when the lever 182 is fixed by the magnet 210 at the retracted position, in the second detection sensor 188, the light receiving portion 202 does not receive the light irradiated from the light projecting portion 200, and in the first detection sensor 186, the light receiving portion 202 receives the light irradiated from the light projecting portion 200. That is, when the light reception by the second detection sensor 188 is not detected and the light reception by the first detection sensor 186 is detected, the lever 182 is fixed by the magnet 210 at the retracted position. In this way, the lever 182 fixed by the magnet 210 at the retracted position is detected by the detection mechanism 180. Then, when the controller 160 detects the lever 182 fixed by the magnet 210 at the retracted position by the detection mechanism 180, the controller 160 controls the operation of the cleaning unit 100 so that the cleaning in the cleaning unit 100 is not restarted. That is, for example, even if a start button or the like is operated, the operation of the start button is canceled so that the cleaning unit 100 does not operate. Thereby, it is possible to prevent cleaning in a state where the lever 182 is fixed by the magnet 210 at the retracted position. Further, when the controller 160 detects the lever 182 fixed by the magnet 210 at the retracted position by the detection mechanism 180, the controller 160 displays a warning screen on the display device 166. A comment indicating that the lever 182 is fixed by the magnet 210 at the retracted position is displayed on this warning screen. Thereby, the operator can recognize that the lever 182 has been forgotten to be returned, and can prevent the lever 182 from being forgotten to be returned by swinging the lever 182 and removing it from the magnet 210.

[0044] Also, the lever 182 fixed by the magnet 210 at the retracted position is detected by the detection mechanism 180. As described above, this detection mechanism 180 also detects that the wiping sheet wound around the wipe roll has become less than the set amount and that the wiping sheet wound around the wipe roll has run out. Conventionally, it has been arranged in the cleaning unit 100. Therefore, by using the detection mechanism 180 that has been conventionally arranged in the cleaning unit 100 to detect the lever 182 fixed at the retracted position, the arrangement of a new detection sensor etc. is omitted, and an increase in cost, an increase in the arrangement space, etc. are suppressed.

[0045] Note that in the above embodiment, the inkjet heads 76, 88 are an example of a discharge device. The cleaning unit 100 is an example of a sheet supply device. The wipe roll 110 is an example of a roll. The second auxiliary roller 116 is an example of a winding shaft. The wipe sheet 138 is an example of a sheet. The lever 182 is an example of a lever. The first detection sensor 186 and the second detection sensor 188 are examples of detection sensors. The magnet 210 is an example of a fixing mechanism.

[0046] Note that the present invention is not limited to the above embodiment, and can be implemented in various forms with various changes and improvements based on the knowledge of those skilled in the art. For example, in the above embodiment, the lever 182 is fixed at the retracted position by the magnet 210, but the lever 182 may be fixed at the retracted position by various fixing mechanisms such as a stopper.

[0047] Also, in the above embodiment, the supply path of the wipe sheet is blocked when the lever 182 fixed at the retracted position contacts the second auxiliary roller 116, but the supply path of the wipe sheet may be blocked by another method. For example, the supply path of the wipe sheet may be blocked when the lever 182 fixed at the retracted position obliquely crosses the supply path of the wipe sheet.

[0048] In addition, in the above-described embodiment, the present invention is applied to the technique of cleaning the ejection ports of the inkjet heads 76 and 88, but the present invention may also be applied to the technique of cleaning the ejection ports of various ejection devices such as dispensers.

[0049] In addition, in the above-described embodiment, the present invention is applied to the ejection device for forming a circuit substrate, but the present invention may also be applied to the ejection device for forming various three-dimensional objects such as figures. Further, the present invention is not limited to the ejection device for forming a three-dimensional object, and may be applied to the ejection device for ejecting fluids such as adhesives, bonding agents, and cream solders. Further, the present invention may be applied to the ejection device used in a printing device for printing an image.

Explanation of Reference Numerals

[0050] 76: Inkjet head (ejection device) 88: Inkjet head (ejection device) 100: Cleaning unit (sheet supply device) 110: Wiper roll (roll) 116: Second auxiliary roller (winding shaft) 138: Wiper sheet (sheet) 182: Lever 186: First detection sensor (detection sensor) 188: Second detection sensor (detection sensor) 210: Magnet (fixing mechanism)

Claims

1. a roll on which a sheet for wiping the discharge port of the discharge device is wound; a lever that is arranged to be able to swing and that comes into contact with a surface of the sheet wound around the roll; a fixing mechanism that fixes the lever to a retracted position away from the roll, thereby blocking a supply path of the sheet pulled out from the roll with the lever, and opens the supply path by releasing the fixation of the lever at the retracted position; A sheet feeding device comprising:

2. The sheet feeding device according to claim 1 , further comprising a detection sensor that detects the lever fixed at the retracted position based on a pivot angle of the lever.

3. 3. The sheet supplying device according to claim 2, further comprising a detection sensor that detects, based on the swing angle of the lever, when the amount of sheet wound on the roll is less than a set amount and when the sheet wound on the roll is exhausted.

4. a winding shaft around which the sheet unwound from the roll is wound; a fixing mechanism that fixes the lever at the retracted position, whereby the lever comes into contact with the winding shaft and blocks the supply path, and that releases the fixation of the lever at the retracted position, whereby the lever moves away from the winding shaft and opens the supply path; The sheet feeding device according to any one of claims 1 to 3, further comprising:

5. 1. A roll replacement method for a sheet supplying device including a roll around which a sheet is wound and a lever that swings toward a surface of the sheet wound around the roll to contact the sheet, comprising: a fixing step of fixing the lever to a retracted position away from the roll, thereby blocking a supply path of the sheet pulled out from the roll with the lever; a replacement step of replacing the roll while the lever is fixed at the retracted position; a release step of releasing the lever from the retreated position to open the supply path after the replacement of the roll in the replacement step is completed; A roll exchange method including:

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