JPS5821587B2 - Ink agitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic viscosity detector and an ink stirrer for a printing press that is linked to the automatic viscosity detector.

Currently, it is widely desired in the printing industry to maintain the viscosity of ink used in printing machines at an optimal viscosity.・In the case of high viscosity, a method is used in which the ink is equipped with an ink agitator (referred to as an agitator), and when the ink has a high viscosity, the viscosity is reduced by stirring the ink using an agitator.

However, conventional ink agitators continue to move while the printing press is in operation, which has the disadvantage of excessively reducing the viscosity of the ink.

The present invention has been devised to eliminate the above-mentioned drawbacks, and uses an automatic viscosity detector equipped with a limit switch mechanism to continuously detect viscosity, and automatically activate the ink agitator at the upper limit of the set viscosity. When the ink agitator starts operating, the ink agitator automatically stops at the lower limit of the set viscosity to prevent the viscosity from decreasing excessively.
It is characterized in that it can be electrically interlocked with an automatic viscosity detector.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An ink agitator according to the present invention will be described below with reference to the drawings which are examples.

FIG. 1 is a schematic diagram of the entire invention, in which A is the main body of the printing press, and the upper ink fountain B is equipped with a viscosity detector having a known ink agitator C and a limit switch mechanism according to the invention. Equipped with a viscosity detector limit and
The lead wire from the switch mechanism section E is electrically connected to the power supply circuit of the drive motor M of the ink agitator 0 through a known relay circuit section indicated by F in the figure.

Therefore, the 9 mint switch mechanism part E of the viscosity detector
The drive motor M of the ink agitator C starts and stops in accordance with the detection signal from the ink agitator C.

FIG. 2 is a schematic side view of a viscosity detector having a limit switch mechanism according to the present invention. A disk 3 is attached to the lower end of the main shaft 2 of the synchronous motor 1, and A metal intermediate shaft 4 is protruded from the part, and a countershaft 6 having a rotor 7 attached to the lower end is elastically connected to the lower end of the intermediate shaft 4 via a metal spring 5 to form a shaft. A metal pointer 8 is protruded from the upper end of the subshaft 6.

Therefore, when the rotor 7 is immersed in ink and the synchronous motor 1 drives the disc 3 at a constant speed, the rotor 7 immersed in the ink and the disc 3 will mutually interact in proportion to the viscous resistance torque that the rotor 7 receives during rotation. It is clear that there will be a discrepancy.

The disk 3 has a structure as shown in FIG. 3. The disk 3 itself is made of an insulating material. On the surface of the disk 30, circular concentric metals i9a and 9b are implanted. metal ring 9
The brushes lla and llb connected to the lead wires 10a and 10b are not in contact with a and 9b, and the intermediate shaft 4 is on the back side.
The flat upper end of the brush 11c is buried in contact with the brush 11c.

Further, the metal rings 9a, 9 are connected by the screws 13a, 13b.
The metal U-shaped protrusions 12a and 12b, which are electrically coupled to only one of the disks 3 and 3 and which hold the disc 3, have a structure shown in FIG.

At this time, the length of the upper arm part 14a of the U-shaped protrusion 12a is shorter than the upper arm part 14b of the U-shaped protrusion 12b, and the length of the lower arm part 14a is shorter than that of the upper arm part 14b of the U-shaped protrusion 12b.
5a and screw 13a and install it,
The length of the screw 13a is determined so that the tip of the screw 13a comes into contact with the metal 3Ju9a of the disc 3.

Similarly, the length of the upper arm portion 14b of the U-shaped protrusion 12b is determined so that the tip of the screw 13b contacts the metal i9b of the disc 3, but does not contact the metal ring 9a.

With the above configuration, the side wire 10a1, the brush 11, the metal ring 9a and the U-shaped protrusion 12a, the lead wire 10b1, the brush 11b1, the metal ring 9b and the U-shaped protrusion 12b, and the lead wire 10c1, the brush 111c1 The intermediate shaft 4, the spring 5, and the pointer 8 are each integrally coupled to form one electrical conductor.

The viscosity detector is located at the appropriate position to detect the viscosity of the ink in the ink fountain (i.e., the ink adhesion).

Of course, it is installed in a range that is agitated by a water filter.

Next, to explain the working surface, as shown in FIG. The U-shaped protrusion 12b is set at a position that is the upper limit of the desired viscosity, and the U-shaped protrusion 12b is set at a position that is the lower limit of the desired viscosity at a position in the forward rotational direction of the synchronous motor 1 from the set position of the protrusion 12a.

However, when the synchronous motor 1 is rotated, the viscous resistance that the rotor 7 receives increases in proportion to the viscosity of the ink, and the discrepancy between the disc 3 and the rotor 7 increases, and eventually the pointer 8 and the U-shaped The vertical surface 16a of the protruding piece 12a comes into contact with the protruding piece 12a.

As a result, the current from the lead wire 10a is increased to one lead wire 10.
a → Brush 11a → Metal element 9a → U-shaped protrusion 12a → Pointer 8 → Spring 5 → Intermediate shaft 4 → Brush 11c → Lead wire 10
flows through one electrical circuit called c.

This signal current enters relay circuit F and agitator C
The drive motor M starts to drive.

Then, as stirring is performed, the viscosity decreases, and the viscous resistance decreases, the deviation between the disc 3 and the rotor 7 becomes smaller, and eventually the vertical surface 16b of the pointer 8 and the U-shaped protrusion 12b becomes smaller.
come into contact with.

As a result, the current from the lead wire 10b is transferred to the lead wire 10b.
b → Brush 11b → Metal ring 9b → U-shaped protrusion 12b → Pointer 8 → Spring 5 → Intermediate shaft 4 → Brush 11c → Lead wire 10
It flows through a circuit called c.

This signal current causes the motor M for driving the agitator C to
stops.

As described above, by setting the positions of the U-shaped protrusions 12a and 12b to arbitrary positions, it is possible to maintain the viscosity of the ink within a desired viscosity range.

The present invention has the following effects in addition to the above configuration.

Since the viscosity of the ink is continuously measured simply by keeping the synchronous motor 1 rotating, a uniform viscosity can be maintained at all times.

In addition, any viscosity range can be freely selected by simply changing the setting positions of the U-shaped protrusions 12a and 12b.
It can be used regardless of the type of printing machine.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the entire printing press incorporating the present invention, Fig. 2 is a schematic side view of a viscosity detector having a limit switch mechanism of the present invention, and Fig. 3 is a main part of the limit switch mechanism. FIG. 4 is a perspective view of a U-shaped protrusion that is a main part of the limit switch mechanism, and FIG. 5 is a diagram showing the positional relationship between the disc, the U-shaped protrusion, and the pointer. The symbol in the drawing is; C...Known agitator-1D...
・Viscosity detector, E...9 Mitswitch mechanism, F
...Known 9-ray circuit section, 1...Synchronous motor, 3.
...Disc, 4...Intermediate shaft, 5...Spring, 7...Rotor, 8...Pointer, 5at9b--Metal ring, 11a
,llb. 11c... Brush, 12a, 12b... U-shaped projection piece, 13a, 13b... Screw, 14a, 14b
・−・Represents the upper arm, respectively.

Claims (1)

[Claims] 1. By connecting a sub-shaft provided with an ink stirring means to a main shaft driven by a rotational drive source via an arbitrary spring body, the stirring means can be easily adapted to changes in the viscosity of the ink obtained by the operation of the stirring means. The rotational speed of the subshaft is configured so that there is a delay in the rotational speed of the subshaft relative to the rotational speed of the main shaft in proportion to the viscous resistance torque received by the subshaft. An electric conductor for stopping the rotational drive source is installed at a position corresponding to the amount of delay in the rotational speed of the sub-shaft relative to the rotational speed of the main shaft that occurs when the set viscosity of the ink reaches the lower limit. The main spindle is equipped with a disc having an electric conductor for starting the ink at a position corresponding to the amount of delay in the rotational speed of the subshaft relative to the rotational speed of the main spindle that occurs when the ink reaches the upper limit of the set viscosity. Ink Agitator-0, which can maintain the ink viscosity range within a preset optimal viscosity range.