CN-121990395-A - Medium conveying apparatus, recording system, and method of controlling medium conveying apparatus

Abstract

The invention provides a medium conveying device, a recording system and a control method of the medium conveying device, which can improve the conveying performance of a medium. The medium conveying device includes a conveying unit that conveys a medium, and a control unit that controls the conveying unit. The conveying section includes a first conveying section that conveys the medium, and a second conveying section that conveys the medium downstream of the first conveying section. The control unit selects the transport speed of the medium by the second transport unit from a plurality of predetermined correction transport speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first transport unit and a reference arrival time. The control unit calculates a corrected conveyance time for conveying the medium at the corrected conveyance speed based on the difference and the selected corrected conveyance speed.

Inventors

• MAEDA HIROYUKI
• MAEDA TAKASHI
• SHIMADA TOMOHIRO

Assignees

• 精工爱普生株式会社

Dates

Publication Date

20260508

Application Date

20251031

Priority Date

20241105

Claims (18)

1. 1. A medium conveying device is characterized by comprising: A conveying unit that conveys a medium; a control unit for controlling the conveying unit, The conveying section includes a first conveying section for conveying the medium, and a second conveying section for conveying the medium downstream of the first conveying section, The control unit selects a transport speed of the medium by the second transport unit from a plurality of predetermined correction transport speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first transport unit and a reference arrival time, and calculates a correction transport time for transporting the medium at the correction transport speed based on the difference and the selected correction transport speed.
2. 2. A medium transporting device according to claim 1, wherein, The corrected conveyance speed includes a reference speed based on the reference arrival time, a high speed that is faster than the reference speed, and a low speed that is slower than the reference speed.
3. 3. A medium transporting device according to claim 2, wherein, The control unit causes the second conveying unit to convey the medium at the correction conveying speed during a correction conveying period based on the correction conveying time, and causes the second conveying unit to convey the medium at a normal conveying speed during a normal conveying period other than the correction conveying period.
4. 4. A medium transporting device according to claim 3, wherein, The conveying section further includes a third conveying section that conveys the medium downstream of the second conveying section, The normal conveying speed is equal to the conveying speed of the medium conveyed by the third conveying section, The control unit causes the second conveying unit to convey the preceding medium and the following medium at the normal conveying speed during a period in which the second conveying unit conveys the trailing end of the preceding medium, and causes the second conveying unit to convey the following medium at the corrected conveying speed after the preceding medium is conveyed by the second conveying unit.
5. 5. The medium transporting device according to claim 4, wherein, The normal conveying speed is slower than the corrected conveying speed.
6. 6. A medium transporting device according to claim 3 to 5, The first conveying section is a feeding section that feeds the medium accommodated in the medium accommodating section, The normal conveying speed is a speed equal to or higher than a conveying speed of the feeding portion.
7. 7. A medium transporting device according to claim 3 to 5, The conveying section further includes a registration roller pair provided downstream of the second conveying section and abutted by the medium conveyed by the second conveying section, The normal conveying speed is slower than the abutting conveying speed and the low speed when the second conveying part abuts the medium on the aligning roller pair, The control unit sequentially changes the conveyance speed by the second conveyance unit to the normal conveyance speed, the corrected conveyance speed, and the abutment conveyance speed.
8. 8. A medium transporting device according to claim 2 to 5, The first conveying section is a feeding section that feeds the medium accommodated in the medium accommodating section, The reference speed is faster than the conveying speed of the feeding portion.
9. 9. A medium transporting device according to claim 2 to 5, The conveying section further includes a registration roller pair provided downstream of the second conveying section and abutted by the medium conveyed by the second conveying section, The low speed is equal to an abutment conveying speed when the second conveying section abuts the medium against the registration roller pair.
10. 10. A medium transporting device according to claim 1 to 5, The control unit controls the second conveying unit so as to perform curved acceleration and deceleration.
11. 11. A medium transporting device according to claim 1 to 5, The conveying section further includes a registration roller pair provided downstream of the second conveying section and abutted by the medium conveyed by the second conveying section, The first conveying portion is a feeding portion that feeds the medium accommodated in the medium accommodating portion.
12. 12. A medium transporting device according to claim 1 to 5, The first conveying section has a switching section capable of switching between a driving state in which the first conveying section rotates at a speed controlled by the control section and a driven state in which the first conveying section rotates from a medium, The control unit rotates the first conveying unit at the predetermined conveying speed when the corrected conveying speed is equal to or higher than the predetermined conveying speed after the medium reaches the predetermined position, and rotates the first conveying unit at the corrected conveying speed when the corrected conveying speed is slower than the predetermined conveying speed.
13. 13. A medium transporting device according to claim 3 to 5, The first conveying section has a switching section capable of switching between a driving state in which the first conveying section rotates at a speed controlled by the control section and a driven state in which the first conveying section rotates from a medium, The control unit rotates the first conveying unit at a predetermined conveying speed when the corrected conveying speed is equal to or higher than the normal conveying speed after the medium reaches the predetermined position, and rotates the first conveying unit at the corrected conveying speed when the corrected conveying speed is slower than the normal conveying speed.
14. 14. The media transport apparatus of claim 12, The control unit changes the conveyance speed of the second conveyance unit after changing the conveyance speed of the first conveyance unit.
15. 15. A recording device is characterized by comprising: A conveying unit that conveys a medium; a recording unit that records a medium conveyed by the conveying unit; a control unit that controls the conveying unit and the recording unit, The conveying section includes a first conveying section for conveying the medium, and a second conveying section for conveying the medium downstream of the first conveying section, The control unit selects a transport speed of the medium by the second transport unit from a plurality of predetermined correction transport speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first transport unit and a reference arrival time, and calculates a correction transport time for transporting the medium at the correction transport speed based on the difference and the selected correction transport speed.
16. 16. The recording apparatus of claim 15, wherein, The conveying section further includes a third conveying section that conveys the medium downstream of the second conveying section, The recording unit performs recording on the medium conveyed by the third conveying unit.
17. 17. A recording system, comprising: A conveying unit that conveys a medium; a recording unit that records a medium conveyed by the conveying unit; A post-processing unit that performs post-processing on the medium recorded by the recording unit; A control unit that controls the conveying unit, the recording unit, and the post-processing unit, The conveying section includes a first conveying section for conveying the medium, and a second conveying section for conveying the medium downstream of the first conveying section, The control unit selects a transport speed of the medium by the second transport unit from a plurality of predetermined correction transport speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first transport unit and a reference arrival time, and calculates a correction transport time for transporting the medium at the correction transport speed based on the difference and the selected correction transport speed.
18. 18. A control method of a medium conveying device is characterized in that, The medium conveying device comprises a first conveying part for conveying the medium and a second conveying part for conveying the medium at the position downstream of the first conveying part, The control method of the medium conveying device comprises the following steps: Selecting a transport speed of the medium by the second transport section from a plurality of predetermined correction transport speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first transport section and a reference arrival time, and A corrected conveyance time for conveying the medium at the corrected conveyance speed is calculated based on the difference and the selected corrected conveyance speed.

Description

Medium conveying apparatus, recording system, and method of controlling medium conveying apparatus Technical Field The present invention relates to a medium conveyance device, a recording system, and a method of controlling the medium conveyance device. Background For example, as in patent document 1, a medium conveying apparatus is disclosed that changes a conveying speed for conveying a subsequent medium based on a difference between an arrival time of a preceding medium at a predetermined position and a reference arrival time. This can improve throughput with respect to the subsequent medium. However, in such a medium conveying apparatus, when the conveying speed is corrected, calculation of the corrected conveying speed becomes complicated. Therefore, there is a possibility that the medium cannot be smoothly conveyed. Thus, a technique for improving the transport performance of a medium is desired. Patent document 1 Japanese patent laid-open No. 2021-187588 Disclosure of Invention The medium conveying device for solving the above-mentioned problems comprises a conveying unit for conveying a medium, and a control unit for controlling the conveying unit, wherein the conveying unit comprises a first conveying unit for conveying the medium and a second conveying unit for conveying the medium downstream of the first conveying unit, and the control unit selects the conveying speed of the medium by the second conveying unit from a plurality of preset correction conveying speeds based on the difference between the arrival time of the medium at a predetermined position downstream of the first conveying unit and a reference arrival time, and calculates the correction conveying time for conveying the medium at the correction conveying speed based on the difference and the selected correction conveying speed. The recording device for solving the above-mentioned problems comprises a conveying section for conveying a medium, a recording section for recording the medium conveyed by the conveying section, a control section for controlling the conveying section and the recording section, wherein the conveying section comprises a first conveying section for conveying the medium and a second conveying section for conveying the medium downstream of the first conveying section, and the control section selects the conveying speed of the medium by the second conveying section from a plurality of predetermined correction conveying speeds based on the difference between the arrival time of the medium at a predetermined position downstream of the first conveying section and a reference arrival time, and calculates the correction conveying time for conveying the medium at the correction conveying speed based on the difference and the selected correction conveying speed. The recording system for solving the above-mentioned problems comprises a conveying section for conveying a medium, a recording section for recording the medium conveyed by the conveying section, a post-processing section for post-processing the medium recorded by the recording section, and a control section for controlling the conveying section, the recording section, and the post-processing section, wherein the conveying section has a first conveying section for conveying the medium and a second conveying section for conveying the medium downstream of the first conveying section, and the control section selects a conveying speed of the medium conveyed by the second conveying section from a plurality of predetermined correction conveying speeds based on a difference between an arrival time of the medium at a predetermined position downstream of the first conveying section and a reference arrival time, and calculates a correction conveying time for conveying the medium at the correction conveying speed based on the difference and the selected correction conveying speed. In a control method of a medium conveying apparatus for solving the above-described problems, the medium conveying apparatus includes a first conveying portion for conveying a medium and a second conveying portion for conveying the medium downstream of the first conveying portion, and the control method includes a process of selecting a conveying speed of the medium by the second conveying portion from a plurality of correction conveying speeds defined in advance based on a difference between an arrival time of the medium at a predetermined position downstream of the first conveying portion and a reference arrival time, and calculating a correction conveying time for conveying the medium at the correction conveying speed based on the difference and the selected correction conveying speed. Drawings Fig. 1 is a schematic diagram showing a recording apparatus according to a first embodiment. Fig. 2 is a schematic diagram showing control contents of the second driving unit according to the first embodiment. Fig. 3 is a schematic diagram showing control contents of the second driving unit according to t