Ink jet device

Patent metadata

Field	Value
Publication number	US-11279133-B2
Application number	US-202017028462-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Sep 26, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

The ink jet device is provided with a plurality of ink jet heads including a plurality of nozzles disposed linearly with each other at intervals in a predetermined longitudinal direction and ejecting ink in different regions each other in the printing width direction; and a position adjusting mechanism performing rotating operation of changing the intervals in the printing width direction of the nozzles by rotating the plurality of ink jet heads around an axis perpendicular to the print surface of the print object, and performing a shifting operation of shifting at least one of the plurality of ink jet heads in the printing width direction.

First claim

The invention claimed is:

1. An ink jet device configured to apply ink to a print object at intervals in a printing width direction perpendicular to a printing direction by ejecting ink from a plurality of nozzles disposed at intervals in the printing width direction, comprising:
a plurality of ink jet heads including the plurality of nozzles disposed linearly with each other at intervals in a predetermined disposing direction, the plurality of ink jet heads ejecting ink in different regions from each other in the printing width direction; and
a position adjusting mechanism performing a rotating operation of changing the intervals in the printing width direction of the nozzles and performing a shifting operation of shifting at least one of the plurality of ink jet heads in the printing width direction, the rotating operation being performed by rotating the plurality of ink jet heads around an axis perpendicular to the print surface of the print object, wherein
the position adjusting mechanism that shifts the at least one of the plurality of ink jet heads comprises:
a shaft disposed to extend in the printing width direction,
a movable element disposed movably along the shaft, and
a rotating shaft through which the at least one of the plurality of ink jet heads that is shifted and the movable element are connected, the at least one of the plurality of ink jet heads that is shifted being configured to rotate around the rotating shaft, and
the movable element is configured to move along the shaft with the at least one of the plurality of ink jet heads that is shifted and the rotating shaft.

2. The ink jet device according to claim 1 , further comprising:
a nozzle position detecting device configured to detect a position of the nozzles of the plurality of ink jet heads; and
a position adjusting mechanism controller configured to control the position adjusting mechanism based on a detection result of the nozzle position detecting device.

3. The ink jet device according to claim 1 , further comprising:
a landing position detecting device configured to detect an ink landing position in the print object after printing; and
a position adjusting mechanism controller configured to control the position adjusting mechanism based on a detection result of the landing position detecting device.

4. The ink jet device according to claim 1 , wherein
the position adjusting mechanism includes:
an attachable and detachable device fixed to the ink jet head;
a holding member configured to hold the ink jet head via the attachable and detachable device;
a moving device configured to hold the ink jet head and rotate the held ink jet head about an axis perpendicular to the print surface of the print object; and
a guiding mechanism configured to guide the moving device in the printing width direction.

5. The inkjet device according to claim 4 , wherein
a fall preventing wire that prevents fall of the inkjet head is connected to the ink jet head, and
the holding member has a plane which faces the moving device and to or from which the attachable and detachable device is attached or detached, and a through hole through which the fall preventing wire passes.

6. The inkjet device according to claim 4 , wherein
the moving device includes a pedestal guided by the guiding mechanism, a chuck configured to hold the ink jet head, and a chuck shaft configured to connect between the pedestal and the chuck such that the pedestal and the chuck are relatively rotatable with each other and are capable of coming close to or separating from each other.

7. The inkjet device according to claim 4 , further comprising
a camera attached to the moving device.

8. The ink jet device according to claim 1 , wherein
the position adjusting mechanism further includes:
a motor attached to the movable element and configured to rotate the at least one of the plurality of ink jet heads around the rotating shaft, and

the movable element is configured to move along the shaft with the at least one of the plurality of ink jet heads, the rotating shaft, and the motor.

9. An ink jet device configured to apply ink to a print object at intervals in a printing width direction perpendicular to a printing direction by ejecting ink from a plurality of nozzles disposed at intervals in the printing width direction, comprising:
a plurality of ink jet heads including the plurality of nozzles disposed linearly with each other at intervals in a predetermined disposing direction, the plurality of ink jet heads ejecting ink in different regions from each other in the printing width direction; and
a position adjusting mechanism performing a rotating operation of changing the intervals in the printing width direction of the nozzles and performing a shifting operation of shifting at least one of the plurality of ink jet heads in the printing width direction, the rotating operation being performed by rotating the plurality of ink jet heads around an axis perpendicular to the print surface of the print object, wherein
the position adjusting mechanism shifts a first ink jet head and a second ink jet head among the at least one of the plurality of ink jet heads that is shifted,
the position adjusting mechanism comprises:
a shaft disposed to extend in the printing width direction,
a first rotating shaft,
a second rotating shaft,
a movable element disposed movably along the shaft, and
a connecting portion, including:
a first end,
a second end opposite to the first end, and
a center portion located between the first end and the second end, the center portion being fixed to the movable element and wherein

the first rotating shaft connects the first end of the connecting portion and one end portion of the first ink jet head, the first ink jet head being configured to rotate around the first rotating shaft, and
the second rotating shaft connects the second end of the connecting portion and one end portion of the second ink jet head, the second ink jet head being configured to rotate around the second rotating shaft.

10. The ink jet device according to claim 9 , wherein
the position adjusting mechanism further includes:
a first motor attached to the one end portion of the first ink jet head and configured to rotate the first ink jet head around the first rotating shaft, and
a second motor attached to the one end portion of the second inkjet head and configured to rotate the second ink jet head around the second rotating shaft.

11. An ink jet device configured to apply ink to a print object at intervals in a printing width direction perpendicular to a printing direction by ejecting ink from a plurality of nozzles disposed at intervals in the printing width direction, comprising:
a plurality of ink jet heads including the plurality of nozzles disposed linearly with each other at intervals in a predetermined disposing direction, the plurality of ink jet heads ejecting ink in different regions from each other in the printing width direction; and
a position adjusting mechanism performing a rotating operation of changing the intervals in the printing width direction of the nozzles and performing a shifting operation of shifting at least one of the plurality of ink jet heads in the printing width direction, the rotating operation being performed by rotating the plurality of ink jet heads around an axis perpendicular to the print surface of the print object,
the position adjusting mechanism includes:
a printing width direction guiding rail disposed to extend in the printing width direction;
a plurality of printing width direction movable elements disposed movably along the printing width direction guiding rail;
a motive power transmi

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yoshida Hidehiro
• Toyofuku Yousuke
• Kumazawa Kentaro

Classifications

• B41J2002/14185

  characterised by the position of the heater and the nozzle · CPC title

• B41J2002/14475

  characterised by nozzle shapes or number of orifices per chamber · CPC title

• B41J2/145 Primary

  Arrangement thereof · CPC title

• B41J25/003

  for changing the angle between a print element array axis and the printing line, e.g. for dot density changes · CPC title

• B41J2202/15

  Moving nozzle or nozzle plate · CPC title