JP4429453B2 - Ink agitator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink agitator provided in an ink fountain of an inking device in an offset printing machine.
[0002]
[Prior art]
A conventional ink agitator is provided with a guide rail incorporating a chain or screw rod in the longitudinal direction of the ink fountain, and is configured to reciprocate while rotating a cone-shaped stirring member that engages with the chain or screw rod. .
[0003]
[Problems to be solved by the invention]
In the above-described conventional device, a motor for driving a chain or a screw rod is required to reciprocate the agitating member, and since the agitating member is reciprocated while rotating, the base of the agitating member has many Since it is composed of parts, the entire device is large and heavy. For this reason, it is necessary to secure a space for installing the ink agitator around the ink fountain, and the ink fountain with the ink agitator attached is heavy, and the operation of attaching and detaching the ink fountain has been an operator burden.
[0004]
The present invention has been considered in view of the above, and an object of the present invention is to provide an ink agitator that can stir ink with a simple structure and that is compact and lightweight.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an ink agitator according to the present invention is engaged and supported by a rodless cylinder provided on the lower side of the ink fountain at the rear side of the ink fountain. A moving table is provided so as to move in the longitudinal direction of the ridge, and a support table to which the base end of the agitator rod formed in a taper shape is fixed to the moving table along the inner bottom surface of the ink fountain. At least two agitator bars are provided at intervals in the longitudinal direction of the ink fountain.
[0006]
[Operation]
By operating the rodless cylinder, the moving table reciprocates in the longitudinal direction of the ink fountain, which causes the agitator bar to reciprocate along the inner bottom surface of the ink fountain, and the ink in the ink fountain is stirred by the agitator bar. The At this time, the reciprocating stroke of the movable table is a length obtained by subtracting the distance between the agitator rods from the longitudinal dimension of the ink fountain. Since the agitator bar has a tapered shape, it is possible to prevent imperfect deposition on the heel roller even if it moves without rotating.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes an ink fountain provided in an inking device of a rotary offset press, and reference numeral 2 denotes a fountain roller provided on the opening side of the ink fountain 1. An ink agitator 3 is provided for stirring the ink in the ink fountain 1. The ink agitator 3 is provided so as to be movable in the longitudinal direction of the ink fountain 1, and its configuration will be described below.
[0008]
Below the ink fountain 1, a slit-type rodless cylinder 4 is provided facing the longitudinal direction of the ink fountain 1 with both ends supported by the brackets 5, 5 and directed toward the longitudinal direction of the ink fountain 1. A movable table 6 is movably engaged and supported by the rodless cylinder 4. The sliding base 6 engages with the rodless cylinder 4 so as not to rotate with respect to the rodless cylinder 4, that is, so that the moving base 6 is maintained in a constant posture in the cross-sectional direction of the rodless cylinder 4. It is engaged via the moving member 6a.
[0009]
A support base 7 having a predetermined length is detachably fixed to the upper part of the movable base 6 in the longitudinal direction of the ink fountain 1 by clamp levers 8, 8. The base end portions of the agitator rods 9 and 9 formed in a tapered shape at positions spaced in the longitudinal direction of 1 are fixed detachably.
[0010]
The agitator rods 9 and 9 are fixed at a position where the lower surface of the taper portion thereof is slightly spaced from the inner bottom surface of the ink fountain 1 (about 2 mm), and the length extends over the entire width of the ink fountain 1. Yes. The stroke of the moving table 6 extends between the positions of the agitator bar 9 on the moving direction side close to the side walls 1a and 1b of the ink fountain 1.
Therefore, the stroke of the movable table 6 by the rodless cylinder 4 is a length obtained by subtracting the distance between the two agitator rods 9 and 9 with respect to the total length of the ink fountain 1. That is, when the length of the ink fountain 1 is L, the stroke of the movable table 6 by the rodless cylinder 4 becomes 1 / 2L by setting the distance between the agitator rods 9, 9 to 1 / 2L. Note that the number of agitator bars 9, 9 is not limited to two, and other agitator bars may be arranged between ½ L intervals.
[0011]
In the above configuration, when the rodless cylinder 4 is reciprocated by air pressure, the agitator bars 9 and 9 are reciprocated along the inner bottom surface of the ink fountain 1 via the movable table 6, and the ink agitator bars 9 and 9 are moved back and forth. The ink in the ink fountain 1 is stirred. At this time, the agitator rods 9 and 9 simply move in parallel without rotating.
[0012]
Further, the moving stroke of the agitator rods 9 and 9 at this time is a length obtained by subtracting the distance between the two agitators 9 and 9 from the total length of the ink fountain 1, and is shorter than the total length of the ink fountain 1.
[0013]
In this operation, the agitator rods 9 and 9 are translated without rotating. As a result of the test, even if the agitator rods 9 and 9 do not rotate, the tapered portions push out the ink to the side of the reed roller 2 when the agitator rods 9 and 9 move in parallel. It has been found that the effect of preventing poor walling on the reed roller 2 due to ink curing can be obtained.
[0014]
【The invention's effect】
According to the present invention, the movement of the agitator bar is performed by pneumatic pressure, so that it is possible to omit a drive motor and a movement-related member such as a chain for the movement, and the apparatus can be made simple, compact, and lightweight. . In addition, by providing at least two agitator bars spaced apart, the stroke of the agitator bar can be shorter than the length of the ink fountain by the distance of the agitator bar, and therefore the stroke of the actuator for moving this stroke. Can be shortened. Furthermore, since the agitator bar does not rotate, the parts related to the agitator bar are greatly reduced, and the problems in the prior art can be effectively solved.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing an embodiment of the present invention.
2 is a partially cutaway view taken along arrow A in FIG.
FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Ink fountain, 2 ... 壺 roller, 3 ... Agitator, 4 ... Rodless cylinder, 5 ... Bracket, 6 ... Moving stand, 7 ... Support stand, 8 ... Clamp lever, 9 ... Agitator stick

Claims (1)

On the rear side of the ink fountain, it is engaged and supported by a rodless cylinder provided on the lower side of the ink fountain, and a moving base is provided that moves in the longitudinal direction of the ink fountain with this rodless cylinder,
A support base to which the base end of the agitator bar formed in a tapered shape along the inner bottom surface of the ink fountain is fixed to the moving base in a detachable manner,
An ink agitator comprising at least two agitator bars spaced apart in the longitudinal direction of the ink fountain.

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