JP2657074B2 - Printing machine safety devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a safety device for a printing press, and is useful when applied to a type in which an inking device unit comes into contact with or separates from a printing press main body.

<Prior Art> In a printing machine that prints banknotes and securities, a plurality of plate cylinders are arranged in a satellite shape around a single blanket cylinder to perform multicolor printing. This type of printing machine has a complicated structure because a plurality of plate cylinders are arranged vertically, and ink is applied to the plate cylinder in order to improve workability in work such as plate replacement and cleaning. It is necessary to secure the working space by separating the supplied ink device from the printing press body. Therefore, conventionally, there has been considered a configuration in which the inking unit is configured to be movable with respect to the printing press main body so that the inking unit can be easily attached and detached.

FIG. 3 is a schematic explanatory view of an example of a printing press of this type in which an inking unit is movable. As shown in FIG. 3, the printing press 11 includes a paper feeding device 12, a printing press main body 13, and a paper discharging device.
14, a paper feed side inking unit 15 and a paper discharge side inking unit 16.
Are connected by a pair of left and right beds 17 extending on the floor surface 10. The printing press main body 13 is rotatably supported by blanket cylinders 18 and 19 which are rotated by driving a main motor (not shown). The four plate cylinders 20 and 21 rotated by the drive are arranged in a satellite shape and are in contact with each other.

The feed-side inking unit 15 and the discharge-side inking unit 16 are located on both sides of the printing press body 13 and are mounted on rails 22 laid on a bed 17 via a plurality of rollers 23. By moving along the rails 22, the printing press body 13 can be approached and separated from each other. Each of these ink unit units 15 and 16 includes a plurality of ink units corresponding to the plurality of plate cylinders 21 or 20, respectively.
24 and a water supply device 25.
These final rollers come into contact with the plate cylinder 21 or 20 when the printing presses 5 and 16 are moved to the printing press main body 13 side and connected to the printing press main body 13. Thus, during printing, the last roller contacts the plate cylinder 21 or 20 and supplies ink to the plate cylinder 21 or 20.

In addition, since the above-described printing press is of a type that prints on both sides of a sheet at a time, the inking device units 15 and 16 are disposed on both the left and right sides of the printing press body 13, respectively. When printing is performed on one side, there is a printer in which one inking unit is provided on one side of the printing press body.

<Problems to be Solved by the Invention> In the above-described printing press, when performing printing preparation such as plate replacement, alignment or washing, washing and leveling operation of the inking unit 15, 16, the inking unit 15, 16 is used. It is retracted away from the printing press body 13. On the other hand, during the printing operation, the inking device units 15 and 16 are advanced toward the printing press main body 13 from the above-described state, and are joined to the printing press main body 13.

During the printing preparation work, in addition to the work described above, the adjustment of the illegal paper detection device in the paper feeding device 12 and the adjustment of the speed of the suction wheel and the air intensity in the paper discharging device 14 are performed by the printing machine main body 13. Rubber blanket
Includes adjustments made by rotating each cylinder at high speed, such as 18, 19 and plate cylinders 20, 21. At this time, since the trunks 18, 19, 20, 21 rotate at a high speed in a bare state, there is a possibility that an operator may be drawn between the trunks 18, 19, 20, 21 due to an erroneous operation.

In order to prevent such ex post fact, it is sufficient to provide a cover for covering each of the cylinders 18, 19, 20, 21. However, when joining the inking device units 15, 16 to the printing press main body 13, the cover is removed. However, there is a problem that it takes time to attach and detach the cover.

Further, in order to prevent the above-described accident, each cylinder 18, 18 only when the inking device units 15, 16 are joined to the printing press main body 13.
It is sufficient to control the main motor that drives each of these cylinders 18, 19, 20, 21 so that 19, 20, 21 rotates at high speed. , 21 must be joined to the printer body 13 each time the ink jet printer is rotated at a high speed, which causes a problem that the working efficiency is reduced.

The present invention has been made in consideration of the above-described problems of the related art, and has been made in consideration of the above-described problems, and has been made in consideration of the above-described problems. Another object of the present invention is to provide a safety device.

<Means for Solving the Problems> According to a configuration of the present invention that achieves the above object, an inking device unit that supplies ink to a printing press main body with respect to a printing press main body that is rotated by driving an electric motor can move in a horizontal direction. In the printing press formed so as to be able to contact and separate from the printing press main body, the printer is disposed below the inking unit when the inking unit is joined to the printing press main body, and an operator rides on these lower portions. It is characterized by having a sensor that sometimes detects this state, and control means that locks the drive other than the slow motion of the electric motor when the sensor detects that the operator is riding on the lower part.

<Operation> According to the present invention having the above configuration, when the inking unit is separated from the printing press main body, the operator exists at a position facing each cylinder of the printing press main body between the printing press main body and the inking device unit. In this case, the sensor detects this and locks the drive of the main motor that drives each body. Therefore, in this case, each body does not rotate.

<Embodiment> An embodiment of the present invention will be described below in detail with reference to the drawings.
The same parts as those in the prior art are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 1, the mat switches 1a and 1b are disposed below the inking units 15 and 16 when the inking units 15 and 16 are joined to the printing press main body 13, respectively. It operates when an operator or the like gets on the vehicle to detect this.

FIG. 2 is a block diagram showing a safety device according to the present embodiment. As shown in the figure, the control device 2 locks the drive of the main motor 3 when the mat switches 1a and 1b are operated by the operator riding the mat switches 1a and 1b, Otherwise, the main motor 3 is driven by operating the push button switches 4a and 4b. At this time, the main motor 3 rotates at a high speed by the operation of the push button switch 4a, and at a low speed by the operation of the push button switch 4b, and rotates the blanket cylinders 18, 19 and the plate cylinders 20, 21.
Are rotated at predetermined speeds.

The printing press 11 is provided with a normal slow motor 5 outside the main motor 3.
It is driven when preparing for printing such as plate exchange and alignment. More specifically, the operation of the push button switch 4c causes the rotation motor 5 to continuously rotate and jog. The rotation and jog of the motor 5 are controlled by a mat switch.
Regardless of the state of 1a, 1b, control is performed via the control device 2 so as to be driven only by the operation of the push button switch 4c. This loose motor 5 also allows the blanket cylinder 18,1
9 and the plate cylinders 20 and 21 rotate, but since this rotation speed is much lower than the low speed operation of the main motor 3, each cylinder 18 and 16 between the inking device units 15 and 16 and the printing press main body. 19,20,21
The operator is in the position where the
There is almost no danger even in the position where 1a and 1b operate. Rather, at the time of printing preparation work such as plate exchange and alignment, it is necessary for an operator to be at a position where the mat switches 1a and 1b are operated and to slowly and slightly move the cylinders 18, 19, 20, and 21. Each body 18, 1 of the rotational force of the main motor 3 and the slow motor 5
Transmission to 9, 20, and 21 is switched by appropriate transmission force switching means such as an electromagnetic clutch (not shown).

According to the present embodiment, the inking device units 15, 16
Is away from the printing press body 13, each cylinder 1 of the printing press body 13 between the printing press body 13 and the inking unit 15, 16.
When an operator is present at a position facing 8,19,20,21, the mat switches 1a, 1b detect that, and the main motor 3
Lock the drive of. Therefore, in this case, even if the push button switches 4a and 4b are operated, the main motor 3 does not rotate.

On the other hand, when the push button switch 4c is operated, the mat switch 1
Even if a, 1b is operating, the slow motion motor 5 rotates, and each cylinder 18, 1
Slow and jog 9,20,21.

<Effects of the Invention> As described above in detail with the embodiment, according to the present invention, the drive of the main motor is locked when an operator is present between the inking unit and the printing press main body. It is possible to prevent an unexpected accident such as an operator coming into contact with each cylinder of the printing press body.

[Brief description of the drawings]

FIG. 1 is an explanatory view conceptually showing a printing machine to which an embodiment of the present invention is applied, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is an explanatory view showing a conventional technique. In the drawings, 1a and 1b are mat switches, 2 is a control device, 3 is a moving device, 13 is a printing press main body, and 15 and 16 are inking device units.

Claims (1)

(57) [Claims] An inking device unit for supplying ink to a printing press main body which is rotated by the drive of an electric motor is formed so as to be movable in a horizontal direction, and can be separated from and connected to the printing press main body. In a printing press, a sensor is provided below the inking device unit when the inking device unit is joined to the printing press body, and a sensor that detects this state when an operator rides on these lower portions; Control means for locking driving other than slow motion of the electric motor when the sensor detects that the vehicle is riding, a safety device for a printing press.