JP2019111755A5

JP2019111755A5 -

Info

Publication number: JP2019111755A5
Application number: JP2017247785A
Authority: JP
Filing date: 2017-12-25
Publication date: 2021-01-14
Anticipated expiration: 2037-12-25

Claims

A recording unit that discharges liquid to a medium transported along a transport path and records it.
A first transport roller provided at a position upstream of the recording unit in the transport path and transporting the medium to the downstream side.
A second transport roller provided in the transport path on the downstream side of the first transport roller and on the upstream side of the recording unit to transport the medium to the downstream side.
A third transport roller that is provided at a position downstream of the recording unit in the transport path so as to rotate in synchronization with the second transport roller and transports the medium to the downstream side.
At least the first transfer roller and a control unit for controlling the rotation of the second transfer roller are provided.
In the case where the transport path to the previous row medium and subsequent media are continuously conveyed at a predetermined interval,
The control unit rotates the second transport roller until the front end of the trailing medium in the transport direction reaches the second transport roller, depending on the position of the rear end in the transport direction at the end of recording of the preceding medium. A recording device characterized in controlling speed .

When a predetermined position between the second transfer roller and the third transfer roller is set as a threshold position,
The control unit controls the rotation speed of the second transport roller until the front end of the trailing medium reaches the second transport roller, based on the position of the rear end of the preceding medium with respect to the threshold position. The recording device according to claim 1, wherein the recording device is characterized by the above.

When the rear end of the preceding medium does not exceed the threshold position at the end of recording of the preceding medium,
The control unit
The first time from the position at the end of recording of the preceding medium until the front end of the following medium reaches the second transport roller.
From the position at the end of recording of the preceding medium, the second time until the rear end of the preceding medium reaches the threshold position is calculated.
The recording device according to claim 2, wherein the rotation speed of the second transport roller is determined so that the second time is shorter than the first time.

A detection unit arranged between the first transfer roller and the second transfer roller in the transfer path and capable of detecting an end portion of the medium in the transfer direction.
A storage unit that stores a first speed table in which the first rotation speed of the first transport roller is set and a second speed table in which a plurality of second rotation speeds are set for the rotation speed of the second transport roller.
With more
The control unit
When the trailing end of the previous medium at the recording end point for said previous medium is positioned on the upstream side of the threshold position and a downstream side of the detecting unit in the transport path,
The first time is calculated based on the first rotation speed set in the first speed table, and the plurality of second hours are calculated based on the plurality of second rotation speeds set in the second speed table. Calculate and
The rotation speed corresponding to one of the second time, which is shorter than the first time and has the shortest arrival time among the plurality of second hours, is selected as the optimum rotation speed from the plurality of second rotation speeds. The recording device according to claim 3 , wherein the second transport roller is rotated at the optimum rotation speed.

The control unit
If there is no time shorter than the first time among the plurality of the second hours, the rotation of the first transport roller is stopped, while the plurality of second rotation speeds set in the second speed table are stopped. The second transfer roller is rotated at the second rotation speed, which is one of the maximum speeds, and the rotation is stopped when the rear end of the preceding medium reaches the threshold position, and then the first The recording device according to claim 4 , wherein the rotation of the transport roller is restarted.

The control unit
When the rear end of the preceding medium at the end of recording with respect to the preceding medium is located upstream of the detection unit in the transport path, the plurality of said vehicles set in the second speed table. The second transfer roller is rotated at one of the second rotation speeds, which is the highest speed among the second rotation speeds, and the rotation is stopped when the rear end of the preceding medium reaches the threshold position. The recording device according to claim 4 or 5 .

The control unit
When the rear end of the preceding medium at the end of recording with respect to the preceding medium is located on the downstream side of the threshold position in the transport path, the rotation of the second transport roller is stopped and the first 1. Of claims 2 to 6, the rotation of the second transport roller is restarted when the front end of the succeeding medium transported by the transport roller reaches the position of the second transport roller. The recording device according to any one item.

The threshold position is located upstream from the position of the third transport roller in the transport direction by a distance corresponding to the distance from the position of the second transport roller to the recording start position by the recording unit with respect to the succeeding medium. The recording device according to any one of claims 2 to 7, wherein the recording device is set.

The control unit
After the recording of the preceding medium by the recording unit is completed and the rotation of the second conveying roller is stopped, the following conveying medium is conveyed to the downstream side by the rotation of the first conveying roller and the following. The recording device according to any one of claims 1 to 8 , wherein the front end of the medium is brought into contact with the second transport roller.