JP3788683B2 - Ink supply device for printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink supply device of a printing apparatus using solid ink.
[0002]
[Prior art]
As a conventional solid ink supply device and method for a printing press, there are JP-A 61-95946 and JP-A 61-192559.
[0003]
However, these conventional ink supply system structures are complicated and have not been configured to supply ink to a predetermined ink chamber only by the operation of the inkjet head.
[0004]
[Problems to be solved by the invention]
As described above, in the ink supply method of the conventional printing press, the control itself is complicated because the ink supply structure is complicated. SUMMARY OF THE INVENTION The present invention provides an ink supply system that eliminates the motor and the electric control of the motor from the ink supply system and supplies ink only by the operation of the inkjet head.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an ink tank for storing ink, a heater for melting solid ink inserted in the ink tank, and an ink tank that communicates with the ink tank by some drive means. A plurality of nozzles provided so as to be ejected as droplets, an inkjet head including these and a carriage that moves to an arbitrary position, an image stand that is set substantially vertically, and a substrate that is fixed to the image stand. In a printing machine having a printed matter and an ink supply means disposed at an arbitrary end on a table, and performing printing by moving freely in a horizontal direction and a vertical direction so as to face the table by advancing toward the head on the image base plane, tighten engage a lever provided on the claw portion and the ink supply means provided in the ink-jet head, the ink supply And a structure in which solid ink accommodated in the unit is supplied to the ink tank in the ink jet head.
[0006]
A specific configuration of the ink supply means includes a lever that is an engagement means with the ink jet head, a recess that holds solid ink opened at an upper portion of the lever, a fulcrum for rotating the lever, A cover that covers the lever and has a first opening through which solid ink is supplied and a second opening through which the solid ink is supplied to the inkjet head, and communicates with the first opening of the cover And an ink supply guide in which solid ink is stored.
[0007]
According to the configuration, when the solid ink is not supplied, the gap of the second opening is narrower than the solid ink diameter when the lever is closed, so that the solid ink is held in the cover, and when the solid ink is supplied, the lever is opened. Since the gap of the second opening is larger than the solid ink diameter in this state, the solid ink mounted in the recess of the lever is dropped toward the ink supply port of the ink tank, and the ink is supplied to the ink tank. be able to.
[0008]
In the present invention, the ink tank is provided with two or more ink supply ports and a claw portion serving as a lever engaging means provided corresponding to each ink supply port. The means is provided with a plurality of levers, and the installation interval of the claw portions and the installation interval of the levers of the ink supply means are relatively different so that the plurality of levers and the claw portions do not engage at the same time. After moving horizontally to the position, the ink is moved forward with respect to the surface of the drawing table so that solid ink is introduced into a predetermined ink tank.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the printing machine 1 is shown in FIG.
[0010]
The printing paper 3 is attached to the front surface of the image stand 2 that is set up almost vertically. An inkjet head 10 that can freely move in the horizontal and vertical directions on the front surface of the printing paper 3 includes a carriage 5 and an ink tank 4 attached to the top of the carriage 5. Reference numeral 12 denotes a claw portion, and 14 denotes an ink chamber.
[0011]
6 is a wire for pulling the inkjet head 10 in the horizontal direction, 7 is a guide for holding the inkjet head 10 horizontally, and 9 is a pulley that is supported by the guide 7 and holds the wire 6. Reference numeral 8 denotes a belt for moving the inkjet head in the vertical direction. One end of the guide 7 is attached to the belt 8.
[0012]
Reference numeral 20 denotes an ink supply unit.
[0013]
FIG. 2 is a perspective view showing the positional relationship between the inkjet head 10 and the ink supply unit 20.
[0014]
In the figure, 21 is a lever provided in the ink supply unit 20, 22 is a fulcrum for supporting the lever 21, and 21 a is a recess for holding the solid ink 27. Reference numeral 25 denotes an ink unit cover of the ink supply unit 20, and 26 denotes an ink supply guide. The ink unit cover 25 has a first opening provided to communicate with the ink supply guide 26 and a second opening opened to the ink tank 74 side.
[0015]
Here, the position interval of the claw portion 12 provided in the ink tank 4 is L2, and the width of the claw portion 12 is d2. In contrast, the interval between the levers 21 of the ink supply unit 20 is L1, and the lever width is d1.
[0016]
FIG. 3 is a cross-sectional view for explaining an ink supply method based on the positional relationship between the inkjet head and the ink supply unit 20.
[0017]
In the figure, 15 is a heater provided in the ink chamber 14, and 11 is an ink ejection nozzle. Further, reference numeral 23 of the ink supply unit 20 is a spring for standing the lever 21, and 28 is a second opening opened in the ink unit cover.
[0018]
Here, the distance between the ink unit cover 25 and the upper end of the lever 21 is L. The diameter of the solid ink is d.
[0019]
FIG. 4 is a cross-sectional view showing a state in which the ink tank 4 in FIG. 3 has advanced to the ink supply unit side (right side of the sheet) and the lever 21 is inclined.
[0020]
Subsequently, the operation will be described with reference to these drawings.
[0021]
The ink jet head 10 can be moved in the horizontal direction of the image base by the wire 6 and the guide 7 and in the vertical direction by the belt 8 (FIG. 1). Further, the ink tank 4 is movable with respect to the carriage 5 in the normal direction of the image base surface (front-back direction with respect to the image base surface).
[0022]
When supplying ink to the inkjet head 10, first, the inkjet head 10 is moved to the position of the ink supply unit 20. Subsequently, the feed amount in the horizontal direction is set with respect to the ink supply unit 20 in accordance with the position of the ink tank 4 that requires ink supply (FIG. 2).
[0023]
Here, if the distance L1 between the levers 21 is set to L1> L2 + d2, when the lever 21 at the left end in FIG. Therefore, in the case of the ink tank 4 having four ink chambers 14, if L1> L2 + d2 and 2 × L1 + d1 <3 × L2 hold simultaneously, the claw portions of each ink chamber and a predetermined lever are in a one-to-one interference position. Can be put in.
[0024]
Next, an operation for putting the solid ink 27 into the ink chamber 14 in the ink tank 4 will be described.
[0025]
FIG. 3 shows the positional relationship between the ink jet head and the ink supply unit before ink is introduced.
[0026]
The solid ink 27 is arranged in alignment in the ink supply guide 26, and one (27a) at the lower end is held in the recess 21a of the lever. The diameter of the dent is almost the same as or slightly larger than the solid ink diameter d. The distance L between the ink unit cover 25 and the upper end of the lever 21 is L <d so that the solid ink does not jump out. Therefore, even if the solid ink is not held in the depression 21a, it does not fall below the ink unit (the position of the ink at this time is indicated by a two-dot chain line).
[0027]
Next, as shown in FIG. 4, if the ink tank 4 of the ink jet head 10 moves forward in the direction of the ink unit and the claw portion 12 is in a position where it interferes with the lever 21, the lever 21 is pushed by the claw portion 12 and the lever 21 is supported. 23, the distance L between the ink unit cover 25 and the upper end of the lever 21 is L> d, and the center of gravity of the solid ink is outside the lever recess position, so that the solid ink 27a is supplied with ink. It is dropped into the ink chamber 14 below the unit.
[0028]
After the ink is supplied, the ink tank 4 is retracted (moved to the left side of the paper), and the lever 21 returns to its original standing state by the action of the spring 23, and the lever recess 21a is at the bottom of the ink supply guide 26. The solid ink 27b is filled.
[0029]
In this way, it is possible to supply ink to a predetermined ink chamber by moving the inkjet head 10 in the horizontal direction and the normal direction of the image base surface.
[0030]
【The invention's effect】
According to the present invention, the ink and the electric control of the motor can be eliminated from the ink supply device by supplying the ink only by the horizontal direction operation of the inkjet head and the normal direction operation of the image plane surface.
[Brief description of the drawings]
FIG. 1 is a perspective view of a printing machine according to the present invention. FIG. 2 is a perspective view of an ink jet head and an ink supply unit. FIG. 3 is a cross-sectional view of an ink jet head and an ink supply unit. Cross section of supply unit 【Explanation of symbols】
2 is an image base, 4 is an ink tank, 5 is a carrier, 6 is a wire, 10 is an inkjet head, 12 is a claw section, 14 is an ink chamber, 15 is a heater, 21 is a lever, 21-a is a recess in the lever, 22 Is a fulcrum, 23 is a spring, 25 is an ink unit cover, 26 is an ink supply guide, 27 is solid ink, and 28 is a second opening.

Claims (3)

An ink tank for storing ink, a heater for melting solid ink inserted into the ink tank, and a plurality of nozzles that communicate with the ink tank and are provided to discharge ink as droplets by some driving means; Ink head composed of a carriage mounted with these and moving to an arbitrary position, an image stand standing almost vertically, a substrate fixed to the image base, and an arbitrary end on the image base A printing press that performs printing by moving freely in a horizontal direction and a vertical direction facing the image table;
By moving the inkjet head forward toward the screen surface, the claw portion provided on the inkjet head and the lever provided on the ink supply means are engaged, so that the solid ink stored in the ink supply means is An ink supply device for a printing press, wherein the ink supply device is configured to be supplied to an ink tank in an inkjet head. The ink supply device for a printing press according to claim 1, wherein:
The ink supply means further includes a recess for holding the solid ink opened at the top of the lever, a fulcrum for rotating the lever, a first opening for covering the lever and supplying solid ink. and a cover solid ink and a second opening to be supplied to the inkjet head is provided in communication with the first opening of the cover, the ink supply guide which solid ink is stored An ink supply device for a printing press, comprising: The ink supply device for a printing press according to claim 1 or 2 ,
The ink tank is provided with two or more ink supply ports and a claw portion that is provided corresponding to each ink supply port and serves as a lever engaging means, and the ink supply means includes a plurality of levers. Ink supply for a printing press characterized in that a plurality of levers and claw portions are not engaged at the same time by making the installation intervals of the claw portions and the installation intervals of the levers of the ink supply means relatively different apparatus.

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