JPH0730360Y2 - Protective cover device for printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a protective cover device in a printing machine in which an inking device unit is detachable from a printing machine main body.

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

FIG. 7 is a schematic side view of an example of this type of inking unit movable printer. As shown in FIG. 7, the printing machine 11 includes a paper feeding device 12, a printing machine main body 13, and a paper ejection device 14.
And a paper feed side and paper discharge side inking unit 15, and the paper feed device 12 and the paper discharge device 14 are connected by a pair of left and right beds 16 extending on the floor surface. A blanket cylinder 18 and a blanket cylinder 19 face each other and are axially supported by the main body 13 of the printing machine, and four blanket cylinders 20 and 21 are satellite-shaped on the peripheral surfaces of the blanket cylinders 18 and 19, respectively. Are placed in contact with each other.

The paper feeding side and the paper discharging side inking unit unit 15 is the printer main body 13
Are placed on both sides of the bed 16 with a plurality of rollers 23 laid between them on the bed 16, and the printing machine main body 13 is moved by moving along the rails 22.
It is possible to approach and separate from each other. Each of these inking device units 15 has a plurality of inking devices 24 and a water supply device 25 respectively corresponding to the plurality of plate cylinders 21 or 20, respectively, and moves the inking device unit 15 to the printing machine main body 13 side. These final rollers come into contact with the plate cylinder 21 or 20 when connected to the printing press main body 13.

Here, the inking device unit 15 obtains its driving force from the printing machine body 13 side when it is connected to the printing machine body 13.
That is, as shown in FIG. 8 showing a part of the drive gear train of the inking device unit 15, the printing machine main body 13 is provided with a plurality of drive gears 27 that mesh with the gears 26 of each plate cylinder 20,
A plurality of driven gears 28 are provided on the inking device unit 15 side, which are engaged with the drive gears 27 and are driven to rotate when the inking device unit 15 is connected to the printing press main body 13. The driven gears 28 are connected to the respective gear trains 29 in the inking unit 15 to drive the rollers of the inking unit 24.

<Problems to be Solved by the Invention> As described above, since power is transmitted between the printing press main body 13 and the inking device unit 15 via the gears 27 and 28, the printing press main body 13 and the inking device unit 15 have the same structure. Gear windows are opened in the frame cover at positions facing the gears 27 and 28, respectively, and conventionally, when the inking unit 15 is separated from the printer main body 13, the gears 27 and 28 are exposed from the gear windows. There was a problem of being lost. Particularly, in the printing machine 11 as shown in FIG. 7 and FIG. 8, since the upper part of the inking device unit 15 is overhung, the gear window is moved from the gear window of the driven gear 28 of the inking device 24 arranged on the upper part. Lubricating oil falls off.

On the other hand, when the rollers are driven with the main body 13 of the printing machine and the inking unit 15 separated for cleaning and preparation for printing, the rotation of the gears 27 and 28 causes the lubricating oil to scatter from the gear window or to be exposed. Since the gears 27 and 28 that have been rotated rotate, there is a problem such as danger. In general, the inking device unit 15 has its own drive motor built-in so that the internal roller group can be rotationally driven while being separated from the printer main body 13.

The present invention solves the problem in the conventional printing machine in which such an inking device unit is detachably attached to the printing machine main body. It is an object to provide a protective cover device that opens and closes windows.

<Means for Solving the Problems> A protective cover device for a printing press according to the present invention that achieves this object is such that an inking unit is detachably attached to a printing press main body and the printing press main body is connected to the inking device unit. And a gear of the inking device unit mesh with each other to transmit power, in a printing machine, a protective cover that opens and closes a gear window of the gear that is opened in a frame cover, and an opening and closing drive of the protective cover. And a sensor for detecting attachment / detachment of the inking device unit to / from the printing press main body, and a control device for controlling the actuator according to a detection signal of the sensor.

<Operation> When the inking unit is separated from the main body of the printing machine, the sensor detects it and operates the actuator by the control unit, and the protective cover closes the gear window. on the other hand,
When the inking unit is connected to the main body of the printing machine, the sensor detects it, the controller reversely actuates the actuator, and the protective cover opens the gear window.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view of a drive gear part implementing the present invention, and FIG. 2 is a perspective view of a protective cover according to an embodiment of the present invention.

As shown in FIG. 1, a gear shaft 32 is fixed to a frame 31, and the drive gear 27 is supported on the gear shaft 32 so as to be rotatable and axially slidable. The drive gear 27 is a gear of the plate cylinder 20 (not shown) in the printer body 13 as described above.
It engages with 26. On the other hand, a part of the outer periphery of the drive gear 27 is exposed to the outside from a gear window 34 opened in the frame cover 33, and when the inking device unit 15 is connected to the printer main body 13, ink is exposed in the exposed portion. It can be engaged with the driven gear 28 on the device unit 15 side. The drive gear 27 is allowed to move in the axial direction in order to smoothly engage the drive gear 27 by moving the drive gear 27 in the axial direction during connection.

The gear shaft 32 is a hollow shaft, and a support shaft 35 is rotatably inserted in the hollow portion. A flange is attached to one end of the support shaft 35.
36 is fixed, and a holder 38 of a protective cover 37 that covers the gear window 34 in an openable and closable manner is fixed to the flange 36. As shown in FIG. 2, the protective cover 37 has a face plate portion 39 curved in an arc shape facing the outer peripheral surface of the drive gear 27 and side plate portions 40 on both sides, and the holder 38 is fixed to the inner surface of the face plate portion 39. Has been done. Thus, the rotation of the support shaft 35 causes the protection cover 37 to rotate concentrically with the drive gear 27, and the rotation causes the gear window 34 to be closed or opened. On the other hand, as shown in FIG. 1, a bracket 41 is fixed to the frame 31 adjacent to the other end of the support shaft 35, and a rotary solenoid 42, which is an actuator for opening and closing the protective cover 37, is attached to the bracket 41. Installed. The drive shaft 43 of the rotary solenoid 42 is connected to the support shaft 35 via a coupling 44, and the support shaft 35 is rotationally driven by the operation of the rotary solenoid 42.

This rotary solenoid 42 is a reversible rotation non-excitation type rotary solenoid with a brake, which is excited to perform forward rotation and reverse rotation by switching energization,
When the energization is cut off, the rotational displacement state is maintained.

Although the gear window 34 of one drive gear 27 of the printer main body 13 has been described above, the above-mentioned protective cover 37, rotary solenoid 42, etc. are similarly provided for the gear windows 34 of all drive gears 27, and the same. Further, the gear window of the driven gear 28 of the inking device unit 15 is also provided.

Further, FIG. 3 is a perspective view of a main part of an inking device unit according to an embodiment of the present invention, FIG. 4 is a schematic view of the inking device unit separated from a printer body, and FIG. It is a control block diagram.

As shown in FIGS. 3 and 4, the inking unit 15
A dog 45 is projectingly provided on the surface facing the printing machine main body 13. On the other hand, as shown in FIG.
A hole is provided in a portion facing the dog 45, and a limit switch 46, which is a sensor for detecting attachment / detachment of the inking device unit 15, is attached thereto. Thus, when the two are connected, the dog 45 pushes the limit switch 46 to activate it, while when the two are disconnected, the dog 45 separates from the limit switch 46,
Release 46.

The detection signal from the limit switch 46 is sent to the control device 47 as shown in FIG. 5, and the control device 47 operates each rotary solenoid 42 at a predetermined timing based on the signal. Here, the timing of activating each rotary solenoid 42 depends on the inclination angle of the frame cover 33 in which the corresponding gear window 34 is formed, and the others are controlled by the timer based on the rotary solenoid 42 to be activated first. It is controlled so as to have a predetermined operation timing.

That is, when the frame cover 33 facing the printing machine main body 13 and the inking device unit 15 is vertical or inclined from the vertical, a gap generated between both frame covers 33 when the two relatively move in the horizontal direction. Will be different. Now, as shown in FIG. 6, for example, when the printer body 13 and the inking device unit 15 are separated by a distance X in the horizontal direction, the same gap is formed in the vertical frame cover 33a, but the inclined frame is formed. The gap Y in the cover 33b is smaller than that. Meanwhile protective cover
When opening and closing 37, an appropriate gap is required between the printer main body 13 and the frame cover 33 of the inking unit 15. Therefore, if this gap is fixed, the printer main body
The required horizontal distance between 13 and the inking device unit 15 differs depending on the inclination of the frame cover 33.

For example, assuming that the four protective covers 37 arranged in the vertical direction as shown in FIG. 4 are A, B, C, and D respectively from above,
The inclination of the frame cover 33 becomes closer to vertical in the order of A and C. Therefore, when the inking device unit 15 is connected to the printing press main body 13, the opening operation of the protective cover 37 is started in the order of B, D, A, and C, while the inking device unit 15 is separated from the printing press main body 13. Occasionally, the operation of closing the protective cover 37 in the reverse order of C, A, D, B is started. By doing so, the gear 2 can be connected and disconnected.
It is possible to minimize the exposure time of 7,28.

In such a configuration, when the inking device unit 15 is connected to the printing machine main body 13, the dog 45 pushes the limit switch 46 in the process, and the rotary solenoid 42 opens the protective cover 37 by the signal and opens the gear window 34. The drive gear 27 and the driven gear 28 are engaged with each other through the gear window 34 which is opened.

On the other hand, when the inking device unit 15 is separated from the printing press main body 13, the pushing of the limit switch 46 by the dog 45 is released, and the rotary solenoid 42 operates in the opposite direction to the above by the signal, and the protective cover 37 is closed.

Here, in this embodiment, since the non-excitation type rotary solenoid with a brake is used as the actuator, for example, even if a power failure occurs during the operation of the printing machine, the previous state is retained, so the protective cover 37 is not provided. It does not open and close. The actuator of the present invention is not limited to this, and an electric motor or the like may be used instead.

Further, in the present embodiment, the gears 27, 2 are changed by changing the opening and closing timing of each protective cover 37 according to the inclination of the frame cover 33.
Since the exposure time of 8 is minimized, it is possible to almost completely prevent dripping of lubricating oil when opening and closing.
However, in the present invention, it is not always necessary to make a difference in the opening and closing timing of the protective covers 37, and all the protective covers 37 are simultaneously adjusted according to the earliest timing when opening and the latest timing when closing. It may be opened and closed.

<Effect of the Invention> As described above in detail with reference to the embodiment, according to the present invention, when the inking unit is separated from the main body of the printing machine, the gear window is automatically operated in association with the separating operation. Since it is covered with a protective cover, the gear is not exposed from the gear window, which is safe, and the lubricating oil can be prevented from splashing from there. Further, since the scattering and the leakage of the lubricating oil can be prevented, the waste of the lubricating oil is eliminated and the management of the lubricating oil amount becomes easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a drive gear part according to the present invention, FIG. 2 is a perspective view of a protective cover according to an embodiment of the present invention, and FIG.
FIG. 4 is a perspective view of an essential part of an inking device unit according to an embodiment of the present invention, FIG. 4 is a schematic view of the inking device unit separated from a printer body, and FIG. 5 is a control block diagram thereof. FIG. 6 is an explanatory view of the gap of the frame cover, and FIG.
FIG. 8 is a schematic side view of a conventional inking unit moving type, and FIG. 8 is a drive gear train diagram of the inking unit. In the drawing, 13 is a printer main body, 15 is an inking device unit, 27 is a drive gear, 28 is a driven gear, 31 is a frame, 33 is a frame cover, 34 is a gear window, 37 is a protective cover, 42 is a rotary solenoid, and 45 is a Is a dog, 46 is a limit switch, and 47 is a control device.

Claims (1)

[Scope of utility model registration request] 1. A printing method in which an inking unit is detachably attached to a printing press main body, and a gear of the printing press main body and a gear of the inking unit are meshed with each other when they are connected to each other to transmit power. In the machine, a protective cover that opens and closes a gear window of the gear opened in a frame cover, an actuator that opens and closes the protective cover, and a sensor that detects attachment / detachment of the inking device unit to / from the printing press main body, A protective cover device for a printing press, comprising: a control device that controls the actuator according to a detection signal of the sensor.