JP7679282B2 - SHEET FEEDING APPARATUS AND ROLL EXCHANGE METHOD - Google Patents

Description

The present invention relates to a sheet supplying device that supplies a sheet from a roll to wipe the discharge port of a discharge device, and a method for replacing the roll.

The following patent document describes a technology for supplying a sheet from a roll on which the sheet is wound:

JP 2012-062128 A

The objective of this specification is to properly replace a roll on which a sheet for wiping the discharge port of a discharge device is wound.

To solve the above problems, this specification discloses a sheet supplying device that includes a roll on which a sheet for wiping the discharge port of a discharge device is wound, a lever that is arranged to be swingable and contacts the surface of the sheet wound on the roll, and a fixing mechanism that fixes the lever to a retracted position away from the roll, thereby blocking the supply path of the sheet pulled out from the roll with the lever, and that opens the supply path by releasing the fixation of the lever in the retracted position.

In order to solve the above problem, this specification discloses a roll replacement method for replacing a roll in a sheet supplying device that includes a roll on which a sheet is wound and a lever that swings toward the surface of the sheet wound on the roll to contact the sheet, the roll replacement method including a fixing step of fixing the lever to a retracted position away from the roll to block 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 in the retracted position, and a release step of releasing the fixation of the lever in the retracted position after the replacement of the roll in the replacement step is completed to open the supply path.

In the present disclosure, the lever is fixed in a retracted position away from the roll, so that the supply path for the sheet pulled out from the roll is blocked by the lever, and the supply path is opened by releasing the lever from the retracted position. Therefore, for example, when an operator retracts the lever to the retracted position when replacing the roll, if the sheet supply path is blocked by the lever after the roll replacement, the operator can be made aware that he or she forgot to release the lever. This makes it possible to properly replace the roll.

FIG. 1 is a diagram showing a circuit forming device. FIG. FIG. FIG. 2 is a block diagram showing a control device. FIG. 2 is a cross-sectional view showing a circuit board with a resin laminate formed thereon. FIG. 2 is a cross-sectional view showing a circuit board having wiring formed on a resin laminate. FIG. FIG. 2 is a schematic diagram showing a detection mechanism. FIG. 2 is a schematic diagram showing a detection sensor. FIG. 2 is a schematic diagram showing a detection mechanism. FIG. 2 is a schematic diagram showing a detection mechanism. FIG. 2 is a schematic diagram showing a cleaning unit. FIG. 2 is a schematic diagram showing a cleaning unit. FIG. 2 is a schematic diagram showing a detection mechanism.

Figure 1 shows a circuit forming apparatus 10. The circuit forming apparatus 10 includes a conveying device 20, a first modeling unit 22, a second modeling unit 24, a cleaning unit 26, and a control device (see Figure 4) 28. The conveying device 20, the first modeling unit 22, the second modeling unit 24, and the cleaning unit 26 are arranged on a base 29 of the circuit forming apparatus 10. The base 29 is generally rectangular in shape, and in the following description, the longitudinal direction of the base 29 is referred to as the X-axis direction, the lateral direction of the base 29 as the Y-axis direction, and the direction perpendicular to both the X-axis direction and the Y-axis direction as the Z-axis direction.

The transport device 20 includes an X-axis slide mechanism 30 and a Y-axis slide mechanism 32. The X-axis slide mechanism 30 includes 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 held by the X-axis slide rail 34 so as to be slidable in the X-axis direction. The X-axis slide mechanism 30 also includes an electromagnetic motor (see FIG. 4) 38, and the X-axis slider 36 is moved to any position in the X-axis direction by the drive of the electromagnetic motor 38. The Y-axis slide mechanism 32 also includes 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 held on the Y-axis slide rail 50 so as to be slidable in the Y-axis direction. Furthermore, the Y-axis slide mechanism 32 has an electromagnetic motor (see FIG. 4) 56, and the table 52 moves to any position in the Y-axis direction by driving the electromagnetic motor 56. As a result, the table 52 moves to any position on the base 29 by driving the X-axis slide mechanism 30 and the Y-axis slide mechanism 32.

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 pallet 70 is fixedly held by clamping both edges in the X-axis direction of the pallet 70 placed on the base 60 between the holding device 62. The lifting device 64 is disposed below the base 60, and raises and lowers the base 60.

The first modeling unit 22 is a unit that models the wiring of the circuit board, and has a first printing section 72 and a baking section 74. The first printing section 72 has an inkjet head (see FIG. 4) 76 that ejects metal ink in a linear shape. The metal ink is a dispersion of nanometer-sized metal particles, such as silver particles, in a solvent. The surfaces of the metal particles are coated with a dispersant to prevent aggregation in the solvent. The inkjet head 76 ejects the metal ink from multiple nozzles, for example, by a piezoelectric method using piezoelectric elements.

The baking section 74 has an infrared irradiation device 78 (see FIG. 4). The infrared irradiation device 78 is a device that irradiates the ejected metal ink with infrared rays, and the metal ink irradiated with infrared rays is baked to form wiring. Note that baking of metal ink is a phenomenon in which the application of energy causes the evaporation of the solvent and the decomposition of the protective film for the metal particles, i.e., the dispersant, and the like, and the metal particles come into contact or fuse together, thereby increasing the conductivity. Then, the metal ink is baked to form metal wiring.

The second modeling unit 24 is a unit that models the resin layer of the circuit board, and has a second printing unit 84 and a curing unit 86. The second printing unit 84 has an inkjet head (see FIG. 4) 88 that ejects ultraviolet curable resin. The ultraviolet curable resin is a resin that is cured by irradiation with ultraviolet light. The inkjet head 88 may be, for example, a piezo type that uses a piezoelectric element, or a thermal type that heats the resin to generate bubbles and ejects the resin from multiple nozzles.

The curing section 86 has a flattening device (see FIG. 4) 90 and an irradiation device (see FIG. 4) 92. The flattening device 90 flattens the top surface of the UV-curable resin discharged by the inkjet head 88, for example by leveling the surface of the UV-curable resin while scraping off excess resin with a roller or blade, thereby making the thickness of the UV-curable resin uniform. The irradiation device 92 has a mercury lamp or LED as a light source, and irradiates the discharged UV-curable resin with ultraviolet light. This hardens the discharged UV-curable resin, forming a resin layer.

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

As shown in FIG. 2 and FIG. 3, the cleaning unit 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 136 and a band-shaped wipe sheet 138 wound around the shaft 136. The reel 112 is composed of a reel body 140, a support shaft 142, and a reel cover 144. The reel body 140 is disc-shaped and fixed to the side of the device body 146. The support shaft 142 is fixed coaxially to the center of the reel body 140. The reel cover 144 is disc-shaped with approximately the same dimensions as the reel body 140, and is coaxially and detachably attached to the tip of the support shaft 142 at the center of the reel cover 144. The support shaft 142 of the reel 112 is inserted into the shaft center 136 of the wipe roll 110, so that the wipe roll 110 is rotatably supported by the reel 112.

The first to seventh auxiliary rollers 114 to 126 are supported rotatably in a position parallel to the axis of the support shaft 142 on the side of the device body 146 to which the reel 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 approximately the same height above the reel 112. The third auxiliary roller 118 is arranged above the second auxiliary roller 116. The direction from the first auxiliary roller 114 to the second auxiliary roller 116 is referred to as the left direction, and the direction from the second auxiliary roller 116 to the first auxiliary roller 114 is referred to as the right direction.

A pressing block 128 is disposed to the left of the second auxiliary roller 116 and the third auxiliary roller 118. The pressing block 128 is raised and lowered 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 disposed at the same height as the third auxiliary roller 118 on the opposite side of the pressing block 128 from the third auxiliary roller 118. The fifth auxiliary roller 122 is disposed below the fourth auxiliary roller 120. The sixth auxiliary roller 124 is disposed diagonally below the left of the fifth auxiliary roller 122. The seventh auxiliary roller 126 is disposed to the right of the sixth auxiliary roller 124. The gear mechanism 130 is composed of a pair of gears 154, 156. The pair of gears 154, 156 are disposed side by side in the left-right direction and mesh with each other. One of the pair of gears 154, 156 is rotated by the drive of an electromagnetic motor 158 (see FIG. 4).

The nozzles of the inkjet heads 76 and 88 are cleaned by the cleaning unit 100 having such a structure. More specifically, one end of the wipe sheet 138 is pulled out from the wipe roll 110 supported by the reel 112, and is wound around the first auxiliary roller 114 and extends to the left. 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 to the left. 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 to the lower left. Furthermore, one end of the wipe sheet 138 is wound around the sixth auxiliary roller 124 and extends to the right, and then wound around the seventh auxiliary roller 126 and extends downward. One end of the wipe sheet 138 extends downward between the pair of gears 154, 156. As a result, when one of the pair of gears 154, 156 is rotated by the operation of the electromagnetic motor 158, the wipe sheet 138 is sent out 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.

In addition, a plurality of nozzles (not shown) for discharging metal ink and ultraviolet curing resin are formed on the lower surface of the inkjet heads 76 and 88. Therefore, 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, thereby lifting the wipe sheet 138 and pressing it against the lower surface of the inkjet heads 76 and 88. Therefore, the wipe sheet 138 lifted by the pressing block 128 is pressed against the multiple nozzles of the inkjet heads 76 and 88. Next, the pressing block 128 vibrates in the left-right direction by the drive of the electromagnetic motor 152. Therefore, the pressing block 128 rises and vibrates while pressing the wipe sheet 138 against the multiple nozzles of the inkjet heads 76 and 88, so that the multiple nozzles are wiped by the wipe sheet 138. In this way, in the cleaning unit 100, the nozzles of the inkjet heads 76 and 88 are cleaned by the wipe sheet 138.

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, and the like, and is mainly a computer, and is connected to the plurality of drive circuits 162. As a result, the operation of the transport device 20, the first modeling unit 22, the second modeling unit 24, and the cleaning unit 26 is controlled by the controller 160. The controller 160 is also connected to a display device 166 via the control circuit 164. As a result, the controller 160 displays an arbitrary image on the display device 166.

In the circuit forming device 10, with the above-mentioned 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 to form a circuit board.

Specifically, when the pallet 70 is set on the base 60 of the table 52, the table 52 moves to below the second modeling unit 24. Then, in the second modeling unit 24, as shown in FIG. 5, a resin laminate 170 is formed on the pallet 70. The resin laminate 170 is formed by repeatedly ejecting ultraviolet curable resin from the inkjet head 88 and irradiating the ejected ultraviolet curable resin with ultraviolet light by the irradiation device 92.

More specifically, in the second printing section 84 of the second modeling unit 24, the inkjet head 88 ejects the ultraviolet curing resin in a thin film on the top surface of the pallet 70. Next, once the ultraviolet curing resin has been ejected in a thin film, the ultraviolet curing resin is flattened by the flattening device 90 in the curing section 86 so that the film thickness of the ultraviolet curing resin is uniform. Then, the irradiation device 92 irradiates the thin film of ultraviolet curing resin with ultraviolet light. This forms a thin film resin layer 172 on the pallet 70.

Then, the inkjet head 88 ejects a thin film of ultraviolet curable resin onto the thin film resin layer 172. The thin film of ultraviolet curable resin is then flattened by the flattening device 90, and the irradiation device 92 irradiates the ejected thin film of ultraviolet curable resin with ultraviolet light, thereby laminating the thin film resin layer 172 on the thin film resin layer 172. In this manner, ejection of ultraviolet curable resin onto the thin film resin layer 172 and irradiation with ultraviolet light are repeated, laminating a plurality of resin layers 172, thereby forming the resin laminate 170.

Next, when the resin laminate 170 is formed, the table 52 moves below the first modeling unit 22. Then, in the first printing section 72 of the first modeling unit 22, the inkjet head 76 ejects metal ink 176 in a line shape according to the circuit pattern onto the upper surface of the resin laminate 170, as shown in FIG. 6. Next, in the baking section 74 of the first modeling unit 22, the infrared irradiation device 78 irradiates infrared rays onto the metal ink 176 ejected according to the circuit pattern. This bakes the metal ink 176, and wiring 178 is formed on the upper surface of the resin laminate 170.

In this way, the resin laminate 170 is formed by the UV-curable resin discharged by the inkjet head 88 in the second modeling unit 24, and the wiring 178 is formed by the metal ink discharged by the inkjet head 76 in the first modeling unit 22, forming a circuit board. Then, as the UV-curable resin and metal ink are repeatedly discharged from the inkjet heads 76 and 88, the discharge condition deteriorates, and the nozzles of the inkjet heads 76 and 88 are cleaned by the cleaning unit 26.

In more detail, in the cleaning section 100 of the cleaning unit 26, as described above, the pressing block 128 is raised, causing the pressing block 128 to lift the wipe sheet 138 and press it against the underside of the inkjet heads 76, 88. The pressing block 128 is then vibrated in the raised state, and the underside of the inkjet heads 76, 88 is wiped by the wipe sheet 138, thereby cleaning the nozzles of the inkjet heads 76, 88. Note that, since the wipe sheet 138 becomes dirty when the nozzles are cleaned by the wipe sheet 138, a predetermined amount of the wipe sheet 138 is sent from the wipe roll 110 toward the gear mechanism 130 by the drive of the electromagnetic motor 158 each time the nozzles are cleaned by the wipe sheet 138.

In this way, each time cleaning is performed with the wipe sheet 138, a predetermined amount of the wipe sheet 138 is sent out from the wipe roll 110, thereby reducing the amount of the wipe sheet 138 wound around the wipe roll 110. For this reason, the cleaning unit 100 is provided with a detection mechanism (see FIGS. 3 and 7) 180 for detecting the amount of the wipe sheet 138 wound around the wipe roll 110.

As shown in Figures 3 and 7, the detection mechanism 180 is composed of a lever 182, a detection target 184, a first detection sensor 186, and a second detection sensor 188. The lever 182 is generally rod-shaped and made of iron. One end of the lever 182 is fixed to a lever shaft 190 arranged above the support shaft 142 of the reel 112 and parallel to the support shaft 142. The lever shaft 190 is held by the device body 146 so as to be rotatable around the axis of the lever shaft 190, and the lever 182 swings around the lever shaft 190, and the lever shaft 190 rotates in accordance with the swing of the lever 182. In addition, a contact roller 191 is arranged 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. As a result, the weight of the other end of the lever 182 becomes heavier than the weight of the one end of the lever 182, and the other end of the lever 182 swings downward due to its own weight. As a result, as shown in FIG. 8, the contact roller 191 disposed at the other end of the lever 182 comes into contact with the surface of the wipe sheet 138 wound around the wipe roll 110.

3 and 7, the lever shaft 190 fixed to one end of the lever 182 penetrates the device body 146 and extends to the side opposite to the side of the device body 146 on which the reel 112 and the like are arranged. The object to be detected 184 is generally annular, and the object to be detected 184 is fixed coaxially to the end of the lever shaft 190 extending to the side opposite to the side of the device body 146 on which the reel 112 and the like are arranged. As a result, when the lever shaft 190 rotates with the swing of the lever 182, the object to be detected 184 also rotates together with the lever shaft 190. The object to be detected 184, which is generally annular, has two notches 192, 194 formed therein, as shown in FIG. 8, and a first annular portion 196 and a second annular portion 198 are arranged between the two notches 192, 194 in the circumferential direction of the object to be detected 184. In addition, in FIG. 8, the object to be detected 184, the first detection sensor 186, and the second detection sensor 188 are shown through the device body 146.

The first detection sensor 186 and the second detection sensor 188 are transmission type sensors and are generally U-shaped as shown in Fig. 9. The first detection sensor 186 and the second detection sensor 188 are composed of a light projecting section 200 and a light receiving section 202 arranged opposite each other, and the light irradiated from the light projecting section 200 is received by the light receiving section 202. The first detection sensor 186 and the second detection sensor 188 are arranged so that the object to be detected 184 is located between the light projecting section 200 and the light receiving section 202, and as the object to be detected 184 rotates, any of the notch 192, the notch 194, the first annular section 196, and the second annular section 198 is located between the light projecting section 200 and the light receiving section 202. Therefore, for example, when the first annular portion 196 or the second annular portion 198 is located 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 the light-receiving portion 202 does not receive the light irradiated by the light-projecting portion 200. On the other hand, when the notch portion 192 or the notch portion 194 is located 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.

8, the first detection sensor 186 and the second detection sensor 188 are disposed symmetrically across the lever shaft 190. 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 is in contact with the surface of the wipe sheet 138, the notches 192, 194 of the detection target 184 are located between the light projecting section 200 and the light receiving section 202 of the first detection sensor 186 and the second detection sensor 188. Therefore, when a large amount of the wipe sheet 138 is wound around the wipe roll 110, the light receiving section 202 of the first detection sensor 186 and the second detection sensor 188 receives the light irradiated from the light projecting section 200. In other words, when the first detection sensor 186 and the second detection sensor 188 detect the reception of light, a large amount of the wipe sheet 138 remains on the wipe roll 110.

In addition, when the amount of wipe sheet 138 wound around wipe roll 110 becomes less than the set amount as the wipe sheet 138 is used, the lever 182 swings as shown in FIG. 10. At this time, the object to be detected 184 rotates with the swing of lever 182, and the second annular portion 198 of the object to be detected 184 is positioned between the light-emitting portion 200 and the light-receiving portion 202 of the first detection sensor 186, and the notch portion 192 of the object to be detected 184 is positioned between the light-emitting portion 200 and the light-receiving portion 202 of the second detection sensor 188. Therefore, when the amount of wipe sheet 138 wound around wipe roll 110 becomes less than the set amount, the light-receiving portion 202 of the first detection sensor 186 does not receive the light irradiated from the light-emitting portion 200, and the light-receiving portion 202 of the second detection sensor 188 receives the light irradiated from the light-emitting portion 200. In other words, if the first detection sensor 186 does not detect the reception of light, but the second detection sensor 188 detects the reception of light, the wipe 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 wipe sheet 138 required to clean the inkjet heads 76, 88 once using the wipe sheet 138. Therefore, if the first detection sensor 186 does not detect the reception of light, but the second detection sensor 188 detects the reception of light, the wipe roll attached to the reel 112 needs to be replaced with a new wipe roll.

In addition, when the wipe sheet 138 wound around the wipe roll 110 is removed as the wipe sheet 138 is used, the lever 182 swings as shown in Fig. 11. At this time, the object to be detected 184 rotates with the swing of the lever 182, and the second annular portion 198 of the object to be detected 184 is positioned between the light-emitting portion 200 and the light-receiving portion 202 of the first detection sensor 186, and the first annular portion 196 of the object to be detected 184 is positioned between the light-emitting portion 200 and the light-receiving portion 202 of the second detection sensor 188. Therefore, when the wipe sheet 138 wound around the wipe roll 110 is removed, the light-receiving portion 202 of the first detection sensor 186 and the second detection sensor 188 does not receive the light irradiated from the light-emitting portion 200. In other words, when the first detection sensor 186 and the second detection sensor 188 do not detect the reception of light, there is no wipe sheet 138 wound around the wipe roll 110.

In this way, the first detection sensor 186 and the second detection sensor 188 can detect the amount of wipe sheet 138 wound around the wipe roll 110 based on the rotation angle of the detection target 184, i.e., the swing angle of the lever 182. Therefore, when the first detection sensor 186 does not detect the reception of light and the second detection sensor 188 detects the reception of light, the controller 160 displays a guide screen on the display device 166. This guide screen displays a message encouraging the user to replace the wipe roll. Furthermore, when the first detection sensor 186 and the second detection sensor 188 do not detect the reception of light, the controller 160 displays an error screen on the display device 166. This error screen displays a message encouraging the user to replace the wipe roll.

Then, after checking the guide screen or the error screen, the worker performs the wipe roll replacement work. That is, the worker removes the reel cover 144 of the reel 112 from the reel body 140, and removes the wipe roll 110 from the support shaft 142. Then, the worker mounts a new wipe roll on the support shaft 142, and then attaches the reel cover 144 to the reel body 140. However, since the lever 182 always swings in a direction approaching the reel 112 due to its own weight, the lever 182 becomes an obstacle when mounting the wipe roll. Therefore, when mounting a new wipe roll on the support shaft 142, the worker needs to swing the lever 182 to a position (hereinafter referred to as the "retracted position") where the lever 182 does not hinder the mounting of the new wipe roll. That is, when mounting a new wipe roll on the support shaft 142, the worker needs to swing the lever 182 in a direction away from the reel 112 and maintain it in the retracted position. For this reason, for example, the operator must mount a new wipe roll on the support shaft 142 with his/her right hand while swinging the lever 182 to the retracted position with his/her left hand, which results in very poor operability.

Therefore, in the cleaning unit 100, as shown in FIG. 12, the magnet 210 is disposed in the upper left direction of the reel 112 and to the left of the lever shaft 190. Therefore, when replacing the wipe roll, the worker swings the lever 182, which is made of iron material, until it comes into contact with the magnet 210, and the lever 182 sticks to the magnet 210 and is held in the retracted position. Therefore, when replacing the wipe roll, the worker does not need to hold the lever 182 in the retracted position. This allows the worker to attach the wipe roll with both hands, improving workability.

When the roll replacement is complete, the worker 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 attached to the reel 112. This allows the detection mechanism 180 to detect the remaining amount of the wipe roll newly attached to the reel 112. However, there are cases where the worker forgets to swing the lever 182 to remove it from the magnet 210 after completing the roll replacement. In other words, there are cases where the worker forgets to return the lever 182 after completing the roll replacement. In such cases, the detection mechanism 180 cannot detect the remaining amount of the wipe roll newly attached to the reel 112, and there is a risk that the wipe sheet will run out when cleaning with it.

In view of this, in the cleaning unit 100, when the lever 182 is fixed in the retracted position by the magnet 210, the supply path of the wipe sheet is blocked by the lever 182, thereby preventing the lever 182 from being forgotten to be returned. In detail, when the worker mounts a new wipe roll on the reel 112, he pulls out one end of the wipe sheet from the wipe roll, winds it around the first auxiliary roller 114, and faces it to the left. Then, the worker winds one end of the wipe sheet 138 around the second auxiliary roller 116, but the lever 182, which is fixed by the magnet 210 in the retracted position, is in contact with the second auxiliary roller 116, and the supply path of the wipe sheet is blocked by the lever 182. Therefore, the worker is unable to wind the wipe sheet around the second auxiliary roller 116 and notices that the lever 182 is fixed in the retracted position. This allows the worker to recognize that he or she has forgotten to return the lever 182, and by swinging the lever 182 to remove it from the magnet 210, the worker can prevent forgetting to return the lever 182. Then, when the lever 182 is removed from the magnet 210, that is, when the lever 182 is released from its fixed position, the lever 182 moves away from the second auxiliary roller 116, as shown in FIG. 13, and the supply path for the wipe sheet is opened. This allows the worker to wrap the wipe sheet around the second auxiliary roller 116, and further around the third to seventh auxiliary rollers 118 to 126, and pass it between the pair of gears 154, 156, thereby setting the wipe sheet in the cleaning unit 100.

In addition, when an operator replaces a wipe roll, the operator may pull out one end of the wipe sheet from the wipe roll newly attached to the reel 112 and splice the one end of the wipe sheet to the end of the wipe sheet remaining in the cleaning unit 100. That is, when the wipe sheet of the wipe roll attached to the reel 112 before the wipe roll replacement (hereinafter referred to as the "old sheet") is set in the cleaning unit 100, that is, when 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, the operator may pull out one end of the wipe sheet from the wipe roll newly attached to the reel 112 and splice the one end of the wipe sheet to the end of the old sheet. In such a case, the operator does not notice the lever 182 fixed in the retracted position because the wipe sheet is not wound around the second auxiliary roller 116.

In view of this, in the cleaning unit 100, the lever 182 fixed by the magnet 210 in 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 in the retracted position, the second annular portion 198 of the object to be detected 184 is located between the light-emitting portion 200 and the light-receiving portion 202 of the second detection sensor 188, and the notch portion 194 of the object to be detected 184 is located between the light-emitting portion 200 and the light-receiving portion 202 of the first detection sensor 186. Therefore, when the lever 182 is fixed by the magnet 210 in the retracted position, in the second detection sensor 188, the light-receiving portion 202 does not receive light irradiated from the light-emitting portion 200, and in the first detection sensor 186, the light-receiving portion 202 receives light irradiated from the light-emitting portion 200. That is, when the second detection sensor 188 does not detect the reception of light and the first detection sensor 186 detects the reception of light, 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 detection mechanism 180 detects the lever 182 fixed by the magnet 210 at the retracted position, the controller 160 controls the operation of the cleaning unit 100 so that cleaning by the cleaning unit 100 is not resumed. That is, for example, even if the start button or the like is operated, the operation of the start button is canceled so that the cleaning unit 100 does not operate. This makes it possible to prevent cleaning in a state in which the lever 182 is fixed by the magnet 210 at the retracted position. Furthermore, when the detection mechanism 180 detects the lever 182 fixed by the magnet 210 at the retracted position, the controller 160 displays a warning screen on the display device 166. This warning screen displays a comment indicating that the lever 182 is fixed in the retracted position by the magnet 210. This allows the worker to recognize that they have forgotten to return the lever 182, and by swinging the lever 182 to remove it from the magnet 210, they can prevent themselves from forgetting to return the lever 182.

The lever 182 fixed by the magnet 210 in the retracted position is detected by the detection mechanism 180. As described above, this detection mechanism 180 detects when the amount of wipe sheet wound around the wipe roll is less than the set amount, and when there is no wipe sheet wound around the wipe roll, and has been conventionally provided in the cleaning unit 100. Therefore, by using the detection mechanism 180 conventionally provided in the cleaning unit 100 to detect the lever 182 fixed in the retracted position, the installation of a new detection sensor, etc. is omitted, and increases in costs and installation space, etc. are suppressed.

In the above embodiment, the inkjet heads 76 and 88 are an example of an ejection device. The cleaning unit 100 is an example of a sheet supplying 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.

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

In the above embodiment, the lever 182 fixed at the retracted position comes into contact with the second auxiliary roller 116 to block the supply path of the wipe sheet, but the supply path of the wipe sheet may be blocked by another method. For example, the lever 182 fixed at the retracted position may be obliquely moved across the supply path of the wipe sheet to block the supply path of the wipe sheet.

In the above embodiment, the present invention is applied to a technique for cleaning the nozzles of the inkjet heads 76 and 88, but the present invention may also be applied to a technique for cleaning the nozzles of various ejection devices such as dispensers.

In the above embodiment, the present invention is applied to a discharge device for forming a circuit board, but the present invention may also be applied to a discharge device for forming various three-dimensional objects such as figurines. The present invention is not limited to a discharge device for forming three-dimensional objects, and may also be applied to a discharge device that discharges fluids such as adhesives, glue, and cream solder. The present invention may also be applied to a discharge device used in a printing device for printing images.

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

Claims (5)

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: The sheet feeder according to claim 1, further comprising a detection sensor that detects the lever fixed in the retracted position based on the swing angle of the lever. The sheet supply device according to claim 2, further comprising a detection sensor that detects when the amount of sheet wound on the roll is less than a set amount based on the swing angle of the lever, and when the sheet wound on the roll is exhausted. 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: 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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