US-20260124842-A1 - MEDIUM TRANSPORT DEVICE, RECORDING DEVICE, RECORDING SYSTEM, AND CONTROL METHOD FOR MEDIUM TRANSPORT DEVICE

US20260124842A1US 20260124842 A1US20260124842 A1US 20260124842A1US-20260124842-A1

Abstract

A medium transport device includes a transport section configured to transport a medium and a control section that controls the transport section; wherein the transport section includes a first transport section that transports the medium and a second transport section that transports the medium downstream of the first transport section. The control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected transport speeds based on a difference between an arrival time of the medium to a predetermined position downstream of the first transport section and a reference arrival time. The control section calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed.

Inventors

Hiroyuki Maeda
Riku MAEDA
Chiaki SHIMADA

Assignees

SEIKO EPSON CORPORATION

Dates

Publication Date: 20260507
Application Date: 20251105
Priority Date: 20241105

Claims (18)

1 . A medium transport device comprising: a transport section configured to transport a medium and a control section configured to control the transport section, wherein the transport section includes a first transport section configured to transport a medium and a second transport section configured to transport a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed.
2 . The medium transport device according to claim 1 , wherein the corrected transport speed includes a reference speed based on the reference arrival time, a high speed higher than the reference speed, and a low speed lower than the reference speed.
3 . The medium transport device according to claim 2 , wherein the control section causes the second transport section to transport the medium at the corrected transport speed in a corrected transport period based on the corrected transport time and causes the second transport section to transport the medium at a normal transport speed in a normal transport period that is not the corrected transport period.
4 . The medium transport device according to claim 3 , wherein the transport section further includes a third transport section that transports a medium downstream of the second transport section, the normal transport speed is equal to a transport speed at which the medium is transported by the third transport section, and the control section when the second transport section is caused to transport plural sheets of a medium including a preceding sheet of medium and a subsequent sheet of medium, causes the second transport section to transport the preceding sheet of medium and the subsequent sheet of medium at the normal transport speed in a period in which the trailing end of the preceding sheet of medium is transported by the second transport section and after the second transport section has completed transport of the preceding sheet of medium, causes the second transport section to transport the subsequent sheet of medium at the corrected transport speed.
5 . The medium transport device according to claim 4 , wherein the normal transport speed is slower than the corrected transport speed.
6 . The medium transport device according to claim 3 , wherein the first transport section is a feeding section that feeds a medium accommodated in a medium accommodation section and the normal transport speed is equal to or higher than a transport speed of the feeding section.
7 . The medium transport device according to claim 3 , wherein the transport section is provided downstream of the second transport section and further includes a registration roller pair against which the medium transported by the second transport section is butted, the normal transport speed is slower than a butting transport speed at which the second transport section butts the medium against the registration roller pair and the low speed, and the control section changes the transport speed of the second transport section in the order of the normal transport speed, the corrected transport speed, and the butting transport speed.
8 . The medium transport device according to claim 2 , wherein the first transport section is a feeding section that feeds a medium accommodated in a medium accommodation section and the reference speed is higher than a transport speed of the feeding section.
9 . The medium transport device according to claim 2 , wherein the transport section is provided downstream of the second transport section and further includes a registration roller pair against which the medium transported by the second transport section is butted and the low speed is equal to a butting transport speed at which the second transport section butts the medium against the registration roller pair.
10 . The medium transport device according to claim 1 , wherein the control section that controls the second transport section so as to perform curvilinear acceleration and deceleration.
11 . The medium transport device according to claim 1 , wherein the transport section is provided downstream of the second transport section and further includes a registration roller pair against which the medium transported by the second transport section is butted and the first transport section is a feeding section that feeds a medium accommodated in a medium accommodation section.
12 . The medium transport device according to claim 1 , wherein the first transport section further includes a switching section that can switch between a driving state in which the first transport section rotates at a speed controlled by the control section and a driven state in which the first transport section can be driven to rotate by a medium and the control section is configured to, after the medium reaches the predetermined position, when the corrected transport speed is equal to or higher than the predetermined transport speed, cause the first transport section to rotate at a predetermined transport speed and when the corrected transport speed is lower than the predetermined transport speed, cause the first transport section to rotate at the corrected transport speed.
13 . The medium transport device according to claim 3 , wherein the first transport section further includes a switching section that can switch between a driving state in which the first transport section rotates at a speed controlled by the control section and a driven state in which the first transport section can be driven to rotate by a medium and the control section is configured to, after the medium reaches the predetermined position, when the corrected transport speed is equal to or higher than the normal transport speed, the first transport section is rotated at a predetermined transport speed and when the corrected transport speed is lower than the normal transport speed, the first transport section is rotated at the corrected transport speed.
14 . The medium transport device according to claim 12 , wherein the control section is configured to change the transport speed of the second transport section after changing the transport speed of the first transport section.
15 . A recording device comprising: a transport section configured to transport a medium; a recording section that performs recording on the medium transported by the transport section; and a control section that controls the transport section and the recording section, wherein the transport section includes a first transport section configured to transport a medium and a second transport section configured to transport a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed.
16 . The recording device according to claim 15 , wherein the transport section further includes a third transport section that transports a medium downstream of the second transport section and the recording section performs recording on the medium transported by the third transport section.
17 . A recording system comprising: a transport section configured to transport a medium; a recording section configured to record on the medium transported by the transport section; a post-processing section configured to perform post-processing on the medium that was recording on by the recording section; and a control section configured to control the transport section, the recording section, and the post-processing section, wherein the transport section includes a first transport section configured to transport a medium and a second transport section configured to transport a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed.
18 . A control method for a medium transport device including a first transport section that transports a medium and a second transport section that transports a medium downstream of the first transport section, the control method comprising: varying a transport speed of the medium by the second transport section to a first speed 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 calculating a corrected transport time for transporting the medium at the first speed based on the difference and the first speed.

Description

The present application is based on, and claims priority from JP Application Serial Number 2024-193403, filed Nov. 5, 2024, and JP Application Serial Number 2025-062495, filed Apr. 4, 2025, the disclosures of which are hereby incorporated by reference herein in its entirety. BACKGROUND 1. Technical Field The present disclosure relates to a medium transport device, a recording device, a recording system, and a control method for a medium transport device. 2. Related Art For example, as in JP-A-2021-187588, a medium transport device is disclosed that changes a transport speed for transporting a subsequent sheet of medium on the basis of a difference between the arrival time at which a preceding sheet of medium arrived at a predetermined position and a reference arrival time. This makes it possible to improve throughput for the subsequent sheet of medium. However, in such a medium transport device, when the transport speed is corrected, the calculation of the corrected transport speed becomes complicated. Therefore, there is a concern that the medium cannot be smoothly transported. Accordingly, it is desired to improve the medium transport performance. SUMMARY A medium transport device that overcomes the above-described problem includes a transport section configured to transport a medium and a control section configured to control the transport section, wherein the transport section includes a first transport section configured to transport a medium and a second transport section configured to transport a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed. A recording device that overcomes the above-described problem includes a transport section configured to transport a medium and a recording section that performs recording on the medium transported by the transport section; and a control section that controls the transport section and the recording section, wherein the transport section includes a first transport section configured to transport a medium and a second transport section configured to transport a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed. A recording system that overcomes the above-described problem includes a transport section configured to transport a medium and a recording section configured to record on the medium transported by the transport section; a post-processing section configured to perform post-processing on the medium that was recording on by the recording section; and a control section configured to control the transport section, the recording section, and the post-processing section, wherein the transport section includes a first transport section configured to transport a medium, and a second transport section configured to a medium downstream of the first transport section and the control section selects a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculates a corrected transport time for transporting the medium at the corrected transport speed based on the difference and the selected corrected transport speed. A control method for a medium transport device that overcomes the above-described problem is for a medium transport device including a first transport section that transports a medium and a second transport section that transports a medium downstream of the first transport section, the control method for the medium transport device including selecting a transport speed of the medium by the second transport section from a plurality of types of predetermined corrected 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 calculating a corrected transport time for transporting the medium at the corrected transport speed based