JP2017030911A - Medium carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medium carrying device capable of preventing the descending of a tension bar by bringing a tension bar position in a tension bar sliding limitation frame into a descending state, when the carrying of paper is stopped.SOLUTION: A medium carrying device carrying a long medium is equipped with a tension applying member which moves in a predetermined range to apply tension on a medium; a tension applying member position detecting section which detects a position of the tension applying member; and a tension applying member position control section which controls the position of the tension applying member. When the carrying of the medium is stopped, the tension applying member position control section positions the tension applying member at the lowermost portion in the predetermined range.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a medium conveying device such as a paper supply device that supplies paper to a printing device or a winding device that winds paper after printing by the printing device.

  Conventionally, in a paper take-up device that winds up printed paper, paper take-up failure based on the speed difference between the paper transport speed in the printing device and the paper take-up speed in the paper take-up device is prevented, and the print quality is not deteriorated. In order to do this, there are some which include a tension bar (tension roller) that absorbs the speed difference (see, for example, Patent Document 1).

JP 2006-150860 A

  Generally, the tension bar is configured to be movable within a tension bar sliding restriction frame provided in the apparatus, and the moving position thereof changes according to the slack of the paper. In a winding device that detects the position of the tension bar that changes according to the slack of the paper and winds up the printed paper while repeating the start and stop of the paper winding operation, The tension bar may drop when stopping.

  Furthermore, with regard to a paper feeding device that supplies paper to the printing device, a device that adjusts the meandering of the paper using a tension bar and a paper cutter provided in the device to cut roll paper at a predetermined size. In an apparatus that uses a tension bar to generate the slack required for the sheet, there is a possibility that the tension bar may drop as the paper is stopped, as with the winding apparatus. In this way, when the tension bar is lowered, there is a risk of noise.

  The present invention has been made in view of such a situation, and an object of the present invention is to lower the tension bar by lowering the tension bar position in the tension bar sliding restriction frame when the conveyance of the paper is stopped. It is an object of the present invention to provide a medium transport device that can prevent the above-described problem.

  In order to solve the above-described problems, a medium transport apparatus according to the present invention is a medium transport apparatus that transports a long medium, a tension applying member that applies tension to the medium by moving within a predetermined range, and the tension A tension applying member position detecting unit that detects the position of the applying member; and a tension applying member position control unit that controls the position of the tension applying member. The tension applying member is positioned at the lowermost part.

  According to the present invention, when the conveyance of the paper is stopped, the tension bar can be prevented from being lowered by lowering the tension bar position in the tension bar sliding restriction frame. A possible medium transport device can be provided.

1 is a schematic configuration diagram illustrating a device configuration according to a first embodiment. It is a block diagram explaining the firmware structure of the winding apparatus which concerns on 1st Embodiment. It is the figure which represented typically the detectable range by a tension bar 1st position sensor-tension bar 3rd position sensor. It is a table showing the relationship between the position of the tension bar and the start / stop of the winding operation. It is a flowchart explaining the common operation | movement in 1st Embodiment. It is a flowchart explaining the common operation | movement in 1st Embodiment. It is a flowchart explaining the fall prevention operation | movement of a tension bar. It is a flowchart explaining the fall prevention operation | movement of a tension bar. It is a flowchart explaining the fall prevention operation | movement of a tension bar. It is a block diagram explaining the apparatus structure which concerns on 2nd Embodiment. It is a block diagram explaining the apparatus structure which concerns on 2nd Embodiment. FIG. 10 is a block diagram illustrating a paper supply device firmware configuration according to a second embodiment. It is a flowchart explaining the common operation | movement in 2nd Embodiment. It is a flowchart explaining the common operation | movement in 2nd Embodiment. It is a flowchart explaining the fall prevention operation | movement of a tension bar. It is a flowchart explaining the fall prevention operation | movement of a tension bar.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably.

[First Embodiment]
FIG. 1 illustrates a printing apparatus 300 that performs printing on a sheet P such as roll paper, a sheet supply apparatus 210 that supplies the sheet P to the printing apparatus 300, and a medium that winds the printed sheet P conveyed from the printing apparatus 300. 1 is a schematic configuration diagram illustrating an overall configuration of a printing system including a winding device 100 as a transport device. In the present embodiment, description will be made centering on the winding device 100 having a function of winding a printed paper while repeating the start and stop of the paper winding operation.

  The printing apparatus 300 includes a print engine (not shown) such as an electrophotographic method, an inkjet method, or a dot impact method. Arbitrary information is printed by the print engine while the paper P supplied from the paper supply device 210 is transported inside the device by the transport roller 31 and the transport roller 30, and the printed paper P is printed outside the device by the transport roller 30. It is conveyed to. The paper P conveyed to the outside of the printing apparatus 300 is taken up by the take-up roller 18 via a tension bar 20 and an idle roller 19 as tension applying members provided in the take-up apparatus 100. Note that a sheet detection sensor 32 as a medium breakage detection member that detects a paper end is provided in the sheet conveyance path between the conveyance roller 31 and the conveyance roller 30.

  The paper supply device 210 continuously supplies the paper P, which is a long medium set in a roll shape, on a supply roller 24 configured to be rotatable in the direction of arrow y in the figure, to the conveyance roller 31 of the printing device 300. An example in which the present invention is applied to a paper supply apparatus will be described in the second embodiment.

  The winding device 100 winds the paper P conveyed from the conveying roller 30 of the printing apparatus 300 by rotating the winding roller 18 as a winding member in the direction of arrow z in the drawing. Between the conveying roller 30 and the take-up roller 18 of the printing apparatus 300, the paper P is slackened to generate a take-up timing, and the paper from the tension bar 20 to the take-up roller 18 An idle roller 19 for guiding P is provided. The tension bar 20 is configured to be slidable in a vertical direction with respect to the conveyance direction of the paper P, that is, in a predetermined range in the vertical direction indicated by an arrow A in the drawing. Generally, even if the printing speed is constant, the winding speed increases as the winding diameter of the winding roller 18 increases. In order to prevent the winding failure of the paper based on the speed difference and the deterioration of the print quality, the winding device 100 winds the paper P while absorbing the speed difference by the tension bar 20. Specifically, the sliding range of the tension bar 20 includes a tension bar first position sensor 12, a tension bar second position sensor 13, which is a tension bar position detecting unit for detecting the vertical position of the tension bar 20, and a tension bar. The bar third position sensor 14 is provided, and the winding device 100 stops the winding operation when the slack of the paper P disappears (the tension bar 20 is raised) while monitoring the vertical position of the tension bar 20. If the slack of the paper P becomes large (the tension bar 20 is lowered), the printed paper P is wound up while repeating the operation of restarting the winding operation.

  Next, the firmware configuration of the winding device 100 will be described with reference to the block diagram of FIG.

  The winding device 100 includes, as hardware resources, a ROM 11, a tension bar first position sensor 12, a tension bar second position sensor 13, a tension bar third position sensor 14, a winding start switch 15, and a winding start switch 15. A stop switch 16 and a winding motor 17 are provided, and these are connected to the CPU 10.

  The CPU 10 is a main component of the present apparatus, and implements each function associated with the program by executing various programs stored in the ROM 11. The CPU 10 also has a tension bar first position sensor 12 to a tension bar third position sensor 14, a winding start switch 15, a winding stop switch 16, and a winding motor 17 based on each function associated with various programs. To control.

  The ROM 11 includes various functions realized by the CPU 10 such as a main control unit 111 that functions as a tension applying member position control unit, a reception control unit 112, a command analysis unit 113, a sensor control unit 114, and a motor control unit 115. Store as a program.

  The main control unit 111 comprehensively controls the operation of this apparatus. The main control unit 111 includes a sensor monitoring control unit 120 and a winding motor control unit 130. The sensor monitoring controller 120 controls the sensor controller 114 to cause the main controller 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14. The take-up motor control unit 130 controls the motor control unit 115 to start and stop the take-up motor 17.

  The reception control unit 112 receives a control command transmitted from an external host device including the printing device 300.

  The command analysis unit 113 analyzes the control command received by the reception control unit 112. The main control unit 111 controls the operation of this apparatus based on the control command analyzed by the command analysis unit 113.

  The sensor control unit 114 controls driving of the tension bar first position sensor 12 to the tension bar third position sensor 14 based on an instruction from the sensor monitoring control unit 120.

  The motor control unit 115 controls driving of the winding motor 17 based on an instruction from the winding motor control unit 130.

  As described above, the tension bar first position sensor 12, the tension bar second position sensor 13, and the tension bar third position sensor 14 detect the vertical position of the tension bar 20 based on the control by the sensor control unit 114, The detection result is output to the main control unit 111. The tension bar first position sensor 12 to the tension bar third position sensor 14 are limited to detection / output formats as long as the vertical position of the tension bar 20 can be detected and the detection result can be output to the main control unit 111. There is no.

  The winding start switch 15 or the winding stop switch 16 is a switch that is formed in an outer casing of the apparatus (not shown) and receives an input to start or stop the winding of the paper P by the user.

  The take-up motor 17 rotates / stops the take-up roller 18 by being driven / stopped based on the control by the motor control unit 115.

  FIG. 3 is a diagram schematically showing a detectable range by the tension bar first position sensor 12 to the tension bar third position sensor 14, and FIG. 4 shows the position of the tension bar 20 and the start / stop of the winding operation. It is a table showing the relationship.

  As shown in FIG. 3, the tension bar 20 according to the present embodiment moves within the Area 1 to Area 6 as a sliding range. In the present embodiment, when the tension bar 20 is positioned at Area 1, that is, when the tension bar 20 is in the most elevated state without the slack of the paper P, all the sensors do not detect the position of the tension bar 20. At this time, as shown in FIG. 4, the winding operation is stopped.

  The tension bar first position sensor 12 detects this when the tension bar 20 is positioned in either Area 2 or Area 3. At this time, as shown in FIG. 4, there is no change in the winding operation.

  The tension bar second position sensor 13 detects this when the tension bar 20 is located in any one of Area3 to Area5. At this time, as shown in FIG. 4, when the tension bar 20 is positioned at Area 3 or Area 4, the winding operation is not changed, and when the tension bar 20 is positioned at Area 5, the winding operation is started.

  The tension bar third position sensor 14 detects this when the tension bar 20 is positioned in either Area 5 or Area 6. At this time, the winding operation is started as shown in FIG.

  Therefore, in the present embodiment, when the tension bar 20 is positioned at Area 1, the winding operation is stopped, and when the tension bar 20 is positioned at Area 5 or Area 6, the winding operation is started. Become.

  Next, the operation according to the present embodiment will be described with reference to FIGS. 5-1, 5-2, 6, 7, and 8. FIG. The operations described with reference to FIGS. 5A and 5B are operations common to the examples described with reference to FIGS. 6 to 8, and the processing A illustrated in FIG. This is the operation described in.

  First, when the winding device 100 is turned on in step S10 of FIG. 5-1, the main control unit 111 waits until the winding start switch 15 is pressed by the user after performing an initial setting operation or the like. To do.

  When the winding start switch 15 is pressed by the user (step S10 Yes), the main control unit 111 starts the winding operation control shown in FIG. 5-2 (step S11), and the winding stop switch 16 is turned on by the user. Check if it was pressed.

  When the winding stop switch 16 is not pressed by the user (No at Step S12), the main control unit 111 starts the A process. The A process described with reference to FIGS. 6 to 8 will be described later.

  On the other hand, when the winding stop switch 16 is pressed by the user (step S12 Yes), the main control unit 111 stops the winding operation control (step S13).

  Here, the winding operation control in step S11 will be described with reference to FIG.

  When the winding operation control is started, the main control unit 111 checks whether or not the winding motor 17 is stopped. When the winding motor 17 is stopped (step S110 Yes), the main control unit 111 causes the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14. An instruction is given to the sensor monitoring controller 120. Upon receiving the instruction, the sensor monitoring control unit 120 controls the sensor control unit 114 to cause the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14.

  When the tension bar second position sensor 13 or the tension bar third position sensor 14 detects that the position of the tension bar 20 is Area 5 or Area 6 (step S111 Yes), the main control unit 111 moves the paper P It is determined that slack has occurred and the tension bar 20 is in the lowered state, and an instruction is given to the winding motor control unit 130 to start the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to activate the winding motor 17 (step S112).

  On the other hand, when the tension bar first position sensor 12 or the tension bar second position sensor 13 detects that the position of the tension bar 20 is a position other than Area 5 or Area 6 (No in step S111), the main control unit 111 Does not start the winding motor 17 and waits until the printing further proceeds and the tension bar 20 is lowered.

  By the way, when the winding motor 17 is being activated (No in step S110), the main control unit 111 outputs the detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14 to the main control unit 111. An instruction is given to the sensor monitoring control unit 120 to cause it to occur. Upon receiving the instruction, the sensor monitoring control unit 120 controls the sensor control unit 114 to cause the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14.

  When the detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14 are not obtained, the main control unit 111 reaches the area 1 of the tension bar 20 (Yes in step S113), and the paper P The slack is eliminated, the tension bar 20 is determined to be in the highest position (the uppermost part in the sliding range), and an instruction is given to the winding motor control unit 130 to stop the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to stop the winding motor 17 (step S114).

  On the other hand, when a detection result is obtained from any one of the tension bar first position sensor 12 to the tension bar third position sensor 14, the main control unit 111 determines that the position of the tension bar 20 has not reached Area1. (Step S113 No), and the winding operation is continued.

  Next, the A process shown in FIG. 5A will be described with reference to FIGS. As described above, when transport is continued in the paper supply device 210 in a paper end state, the paper P cannot be pressed when the rear end of the paper passes through the transport roller 30 of the printing apparatus 300. At this time, if the tension bar 20 is located at a position other than the lowest position, the tension bar 20 is lowered by its own weight.

  In order to prevent this, in the present embodiment, any one of Case 1 (Step S14) shown in FIG. 6, Case 2 (Step S15) shown in FIG. 7, or Case 3 (Step S16) shown in FIG. The method shall be implemented.

  First, case 1 (step S14) shown in FIG. 6 will be described. In case 1, when the paper detection sensor 32 installed in the printing apparatus 300 located on the upstream side of the paper conveyance path of the winding device 100 detects a paper end, the paper end is notified to the winding device 100. This notification may be performed by changing a control command or when the winding device 100 and the printing device 300 are connected by a signal line.

  In FIG. 6, first, when a paper end notification is received from the printing apparatus 300 (Yes in step S <b> 140) and the winding motor is activated (Yes in step S <b> 141), the main control unit 111 immediately takes up the winding motor control unit 130. Is instructed to stop the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to stop the winding motor 17 (step S142).

  Thereafter, the main control unit 111 does not perform the winding operation control until the winding start switch 15 is pressed by the user.

  Next, case 2 (step S15) shown in FIG. 7 will be described. In case 2, the amount of paper transport required until the position of the tension bar 20 is lowered from the highest position (the uppermost part in the sliding range) to the lowest position (the lowest part in the sliding range) is preliminarily taken up. To the printing apparatus 300 using a control command. On the printing apparatus 300 side, after the paper detection sensor 32 detects the paper end, the remaining conveyance amount until the trailing edge of the sheet reaches the conveyance roller 30 is the conveyance amount obtained by the notification from the winding device 100. When the control command or the winding apparatus 100 and the printing apparatus 300 are connected by a signal line, the stop request is notified to the winding apparatus 100 by changing the signal.

  In FIG. 7, first, when there is a winding stop request notification from the printing apparatus 300 (Yes in step S150), the main control unit 111 checks whether the winding motor 17 is being activated. When the winding motor 17 is being activated (step S151 Yes), the main control unit 111 immediately stops the winding motor 17 in the winding motor control unit 130 without confirming the position of the tension bar 20. Give instructions to do. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to stop the winding motor 17 (step S152).

  Thereafter, the main control unit 111 does not perform the winding operation control until the winding start switch 15 is pressed by the user.

  In Case 1, when the paper detection sensor 32 of the printing apparatus 300 detects the paper end, the winding operation is immediately stopped. However, depending on the arrangement position of the paper detection sensor 32, the paper P sent from the printing apparatus 300 after the winding operation is stopped may become long and become bellows. On the other hand, in case 2, when the paper detection sensor 32 of the printing apparatus 300 detects a paper end, the winding operation is stopped after a certain amount of paper is fed, so that the paper P can be prevented from becoming bellows. it can.

  Next, case 3 (step S16) shown in FIG. 8 will be described. Case 3 assumes a case where the printing apparatus 300 makes an emergency stop due to the occurrence of a paper jam or the like, and notifies the winding apparatus 100 of the emergency stop. When the printing apparatus 300 performs an emergency stop, the printing apparatus 300 side does not carry the paper any more. Therefore, when the tension bar 20 is in the raised position, the tension bar 20 cannot be lowered by the paper conveyance. Therefore, in case 3, in order to lower the tension bar 20, the winding motor 17 is reversely rotated, and the tension bar 20 is lowered by returning the paper P once wound.

  In FIG. 8, first, when there is an emergency stop instruction from the printing apparatus 300 (step S160 Yes), the main control unit 111 confirms whether or not the winding motor 17 is being activated. When the winding motor 17 is being activated (step S161 Yes), the main control unit 111 immediately instructs the winding motor control unit 130 to stop the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to stop the winding motor 17 (step S162).

  Then, the main control unit 111 gives an instruction to the sensor monitoring control unit 120 to cause the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14. Upon receiving the instruction, the sensor monitoring control unit 120 controls the sensor control unit 114 to cause the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14.

  When the position of the tension bar 20 is other than Area 6 (step S163 Yes), the main control unit 111 instructs the winding motor control unit 130 to reversely rotate the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to rotate the winding motor 17 in the reverse direction (step S164).

  When the tension bar 20 moves down to Area 6 (step S165 Yes), the main control unit 111 gives an instruction to the winding motor control unit 130 to stop the winding motor 17. Receiving the instruction, the winding motor control unit 130 controls the motor control unit 115 to stop the winding motor 17 (step S166).

  As described above, in the control of Case 1 and Case 2 according to the present embodiment, the tension bar 20 is moved between the time when the printing apparatus 300 detects the paper end and the time when the paper end is detached from the conveyance roller 30 of the printing apparatus 300. Move to the lowest position. Further, in the control of the case 3, the tension bar 20 is moved to the lowest position by returning the paper P once taken up by rotating the take-up motor 17 in the reverse direction. Thereby, even if an emergency stop occurs in the paper end or the printing apparatus 300, the tension bar 20 can be prevented from being lowered, and damage to the apparatus can be prevented.

[Second Embodiment]
In the second embodiment, an example in which the present invention is applied to a paper supply apparatus will be described. The paper supply device according to the present embodiment is different from the configuration of the winding device 100 described in the first embodiment in that the paper P is nipped and transported by a pair of transport rollers. In the following description, the same members are denoted by the same reference numerals, and the description thereof is omitted.

  FIGS. 9A and 9B are schematic configuration diagrams illustrating the configurations of the paper supply device 200 and the paper supply device 200 ′ that supply the paper P to the printing apparatus 300. FIGS. The paper supply device 200 ′ is different from the paper supply device 200 in that a paper cutter 27 is provided in the paper conveyance path, and a paper detection sensor 21 ′ is provided on the downstream side of the paper conveyance path of the paper cutter 27.

  A sheet supply apparatus 200 shown in FIG. 9A is configured to transfer a sheet P set in a roll shape on a supply roller 24 serving as a supply member configured to be rotatable in the direction of an arrow y in the drawing. , 25b, 25c, 25d. A paper detection sensor 21 is provided between the transport roller 25a and the transport roller 25b as a medium-out detection unit that detects the paper end of the paper P. A fixed roller (idle roller) 26a and a fixed roller 26b are provided between the transport roller 25b and the transport roller 25c, and between the transport roller 25d and the transport roller 31 of the printing apparatus 300, respectively.

  A tension bar 20 is provided between the transport roller 25c and the transport roller 25d to generate a supply timing by causing the paper P to be slack, and the tension bar 20 is the same as in the first embodiment. The bar 20 is configured to be slidable in the vertical direction indicated by an arrow A in the drawing by its own weight. Further, a tension bar first position sensor 12, a tension bar second position sensor 13, and a tension bar third position sensor 14 for detecting the vertical position of the tension bar 20 are provided in the sliding range of the tension bar 20. The paper supply device 200 monitors the vertical position of the tension bar 20 and stops the paper conveyance when the looseness of the paper P disappears (the tension bar 20 is raised), and if the looseness of the paper P increases. (The tension bar 20 is in the lowered state), and the paper P is supplied to the printing apparatus 300 while repeating the operation of restarting the paper conveyance.

  9-2 includes a paper cutter that cuts the paper P by a predetermined length between the transport roller 25a and the transport roller 25b in addition to the configuration of the paper supply device 200 illustrated in FIG. 27 is provided. The paper cutter 27 is connected to a paper cutter motor 23 to be described later, and cuts the paper P based on an instruction from the paper cutter control unit 150. On the downstream side of the paper conveyance path of the paper cutter 27, a paper detection sensor 21 ′ is provided as a medium breakage detection unit that detects the rear edge of the paper P cut by the paper cutter 27.

  Next, the firmware configuration of the paper supply device 200 and the paper supply device 200 ′ will be described with reference to the block diagram of FIG. As described above, since the paper supply apparatus according to the present embodiment can have substantially the same configuration as the configuration of the winding apparatus 100 described in the first embodiment, different portions will be described.

  The paper supply device 200 and the paper supply device 200 ′ include, as hardware resources, a ROM 11 ′, a tension bar first position sensor 12, a tension bar second position sensor 13, a tension bar third position sensor 14, and a paper detection. A sensor 21, a paper detection sensor 21 ′, a transport motor 22, and a paper cutter motor 23 are provided, and these are connected to the CPU 10.

  The ROM 11 ′ stores a main control unit 111 ′, a reception control unit 112, a command analysis unit 113, a sensor control unit 114 ′, and a motor control unit 115 ′ as various programs as functions realized by the CPU 10.

  The main control unit 111 ′ comprehensively controls the operation of this apparatus. The main control unit 111 ′ includes a sensor monitoring control unit 120, a transport motor control unit 140, and a paper cutter control unit 150. The transport motor control unit 140 controls the motor control unit 115 ′ to start and stop the transport motor 22. The paper cutter control unit 150 controls driving of the paper cutter motor 23.

  The sensor control unit 114 ′ controls the driving of the tension bar first position sensor 12 to the tension bar third position sensor 14 based on an instruction from the sensor monitoring control unit 120, and from the sheet detection sensor 21 and the sheet detection sensor 21 ′. Is output to the main control unit 111 ′.

  The motor control unit 115 ′ controls driving of the carry motor 22 based on an instruction from the carry motor control unit 140.

  The paper detection sensor 21 and the paper detection sensor 21 ′ detect the paper end of the paper P passing through the paper transport path based on an instruction from the sensor control unit 114 ′, and output the detection result to the main control unit 111 ′. As the paper detection sensor 21 and the paper detection sensor 21 ′, the detection / output format is not limited as long as the paper end of the paper P can be detected and the detection result can be output to the main control unit 111 ′.

  The conveyance motor 22 is started / stopped based on an instruction from the motor control unit 115 ′ to rotate or stop any or all of the conveyance rollers 25a to 25d.

  The paper cutter motor 23 drives / stops the paper cutter 27 by driving / stopping based on an instruction from the paper cutter control unit 150.

  Next, operations according to the present embodiment will be described with reference to FIGS. 11-1, 11-2, 12, and 13. FIG. The operations described in FIGS. 11A and 11B are operations common to the examples described in FIGS. 12A and 12B, and the B process illustrated in FIGS. This is the operation described in. In the following description, operations that can be commonly described in the paper supply device 200 shown in FIG. 9A and the paper supply device 200 ′ shown in FIG. 9B will be described using the paper supply device 200 as an example. To do.

  First, in step S <b> 20 of FIG. 11A, the main control unit 111 ′ of the paper supply apparatus 200 monitors whether or not there is a request to start conveyance of the paper P from the printing apparatus 300. When receiving a transport request for the paper P via the reception control unit 112 (Yes in step S20), the main control unit 111 ′ instructs the transport motor control unit 140 to drive the transport motor 22. Receiving the instruction, the transport motor control unit 140 controls the motor control unit 115 ′ to activate the transport motor 22 (step S21).

  Next, in FIG. 11B, the main control unit 111 ′ that has activated the conveyance motor 22 performs a conveyance state monitoring process. Specifically, the main control unit 111 ′ performs the B process described with reference to FIGS. 12 and 13 while the paper P is being conveyed (Yes in step S22). On the other hand, when the paper P is not in a state of being conveyed (No at Step S22), the main control unit 111 ′ ends the conveyance state monitoring process.

  In the first embodiment, when the paper end occurs in the paper P, the configuration in which the tension bar 20 is lowered by causing the paper P to be slack by stopping the winding operation has been described. In the paper supply apparatus 200 according to the embodiment, in order to cause the paper P to be slack, it is necessary to transport the paper P at a speed higher than the paper transport speed (pulling speed) in the printing apparatus 300. Therefore, in case 4 (step S23) shown in FIG. 12, when the paper end in the paper P is detected, the paper feed speed by the transport roller is increased, and the tension bar 20 is lowered before the rear end of the paper comes off the transport roller. Will be described.

  In FIG. 12, first, when the paper detection sensor 21 of the paper supply apparatus 200 detects a paper end (Yes in step S230), the main control unit 111 ′ causes the transport motor control unit 140 to increase the drive speed of the transport motor 22. Give instructions. Receiving the instruction, the transport motor control unit 140 controls the motor control unit 115 ′ to increase the drive speed of the transport motor 22 (step S231).

  Then, the main control unit 111 ′ counts the amount of paper transport from the time point when the paper detection sensor 21 detects the paper end, and confirms the timing when the rear end of the paper passes through the transport roller 25c. When the trailing edge of the sheet passes through the transport roller 25c (step S232 Yes), the main control unit 111 ′ instructs the transport motor control unit 140 to stop driving the transport motor 22. Upon receiving the instruction, the transport motor control unit 140 controls the motor control unit 115 ′ and stops driving the transport motor 22 (step S233). This is to prevent the sheet P from being pulled again by the printing apparatus 300 and the tension bar 20 being raised if the conveyance motor 22 is stopped before the trailing edge of the sheet passes through the conveyance roller 25c.

  In step S231, the conveyance motor control unit 140 of the sheet supply device 200 maintains the conveyance speed after the acceleration of the sheet P in the range from the sheet detection sensor 21 to the conveyance roller 25c illustrated in FIG. Thus, the drive speed of the transport motor 22 is controlled. On the other hand, the transport motor control unit 140 of the paper supply device 200 ′ transports the transport speed after the acceleration of the paper P in the range from the paper detection sensor 21 ′ to the transport roller 25c shown in FIG. The drive speed of the motor 22 is controlled. This is because the paper supply device 200 ′ includes the paper cutter 27 and the position where the trailing edge of the cut paper P is detected is different. In the paper supply device 200 ′, the range in which the conveyance speed is increased is shorter than that in the paper supply device 200. Therefore, the conveyance speed in the paper supply device 200 ′ after the paper end detection is higher than the conveyance speed in the paper supply device 200. It is preferable to set a high transport speed.

  The transport rollers that are subjected to rotation control by the transport motor 22 may be all of the transport rollers 25a to 25d, but if the transport speed control after the paper end detection in step S231 can be performed, the transport roller 25a. Any of the conveyance rollers 25b to 25d except for the above may be the target of rotation control by the conveyance motor 22.

  Next, Case 5 (step S24) shown in FIG. 13 will be described. In Case 5, it is assumed that when the printing apparatus 300 performs an emergency stop due to the occurrence of a paper jam or the like, the paper supply apparatus 200 is notified of the emergency stop. When the printing apparatus 300 performs an emergency stop, the printing apparatus 300 side does not carry the paper any more. Therefore, when the tension bar 20 is in the raised position, the tension bar 20 cannot be lowered by the paper conveyance. Therefore, in the case 5, when the tension bar 20 is not positioned at the Area 6 described in the first embodiment, after the paper is continuously conveyed until the tension bar 20 is lowered to the Area 6, the conveyance motor 22 is turned on. Stop.

  In FIG. 13, first, when an emergency stop instruction is issued from the printing apparatus 300 (Yes in step S240), the main control unit 111 ′ uses the detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14 as main results. An instruction is given to the sensor monitoring control unit 120 so that the control unit 111 ′ outputs the result. Upon receiving the instruction, the sensor monitoring control unit 120 controls the sensor control unit 114 ′ and causes the main control unit 111 to output detection results from the tension bar first position sensor 12 to the tension bar third position sensor 14.

  When the current position of the tension bar 20 is other than Area 6 (step S241 Yes), the main control unit 111 ′ instructs the transport motor control unit 140 to continue driving the transport motor 22. When the tension bar 20 is lowered to Area 6 (step S242 Yes), the main control unit 111 ′ instructs the transport motor control unit 140 to stop driving the transport motor 22. Receiving the instruction, the transport motor control unit 140 controls the motor control unit 115 to stop driving the transport motor 22 (step S243).

  On the other hand, when the current position of the tension bar 20 is Area 6 (No in step S241), the main control unit 111 ′ instructs the transport motor control unit 140 to stop driving the transport motor 22, and the transport motor 22 Stop driving.

  As described above, according to the present embodiment, similarly to the first embodiment, even if an emergency stop occurs in the paper end or the printing apparatus 300, the tension bar 20 can be prevented from being lowered and the apparatus can be operated. Can prevent damage.

  The present invention can be applied to a medium conveying device such as a winding device or a paper supply device that includes a tension bar that generates a winding timing by causing the paper to slack.

10 CPU
11, 11 'ROM
12 Tension bar first position sensor 13 Tension bar second position sensor 14 Tension bar third position sensor 15 Winding start switch 16 Winding stop switch 17 Winding motor 18 Winding roller 19 Idle roller 20 Tension bars 21, 21 'Paper Detection sensor 22 Conveyance motor 23 Paper cutter motor 24 Supply rollers 25a to 25d Conveyance rollers 26a, 26b Fixed rollers 30, 31 Conveyance roller 32 Paper detection sensor 100 Winding device 111, 111 'Main control unit 112 Reception control unit 113 Command analysis unit 114, 114 ′ sensor control unit 115, 115 ′ motor control unit 120 sensor monitoring control unit 130 take-up motor control unit 140 transport motor control unit 150 paper cutter control unit 200, 200 ′, 210 paper supply device 300 printing device

Claims (9)

A medium conveying apparatus for conveying a long medium,
A tension applying member that applies tension to the medium by moving within a predetermined range;
A tension applying member position detecting unit for detecting the position of the tension applying member;
A tension applying member position control unit for controlling the position of the tension applying member;
The medium applying apparatus, wherein the tension applying member position control unit positions the tension applying member at a lowermost part of the predetermined range when the medium is stopped. The medium conveying apparatus according to claim 1, wherein the tension applying member position detecting unit is a plurality of sensors provided along the predetermined range. A medium shortage detecting unit for detecting medium shortage of the medium;
The tension applying member position control unit positions the tension applying member at the lowermost part of the predetermined range when the medium out detection is detected by the medium out detection unit. The medium carrying device described in 1. The medium breakage detection unit is provided on the upstream side in the transport direction of the medium via the tension applying member,
The medium conveying apparatus according to claim 3, further comprising a winding member that winds the medium while rotating the medium on the downstream side in the conveying direction of the medium via the tension applying member. The medium conveying apparatus according to claim 4, wherein the tension applying member position control unit stops the winding member when the medium out detecting unit detects the medium out. 5. The medium transport device according to claim 4, wherein the tension applying member position control unit stops the winding member after transporting a certain amount of medium when the medium out-of-medium detection unit detects the medium out-of-medium. . The medium conveying apparatus according to claim 4, wherein the tension applying member position control unit reversely rotates the winding member when the medium out detecting unit detects the medium out. A supply member for supplying the medium to the upstream side in the transport direction of the medium via the tension applying member;
A transport member that transports the medium from the supply member;
The medium-out detection part is provided between the tension applying member and the supply member,
The medium conveying apparatus according to claim 3, wherein when the medium depletion detecting unit detects the medium depletion, the tension applying member position control unit increases a conveyance speed of the medium by the conveying member. The tension applying member is a tension bar configured to be slidable in a direction perpendicular to a conveyance direction of the medium, and is a tension bar that repeatedly moves in the predetermined range in accordance with a tensile force with respect to the medium. The medium carrying device according to any one of claims 1 to 8.