JPH0751319Y2 - Printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a printing machine in which an inking device unit is detachably attached to a printing machine body, and a drive mechanism for transmitting a driving force from the printing machine body to the inking device unit. Regarding

<Prior art> Among the rotary printing presses, the satellite style ones are
Generally, an inking unit having a plurality of inking units is detachably attached to a main body of a printing machine. This is because it is driven by the inking device alone to perform plate preparation work such as mounting a new printing plate on the plate cylinder, preparatory work such as printing adjustment, or for cleaning the ink roller of the inking device, passing ink, and adjusting the nip width. It has a composition. In such a conventional printing machine, normally, one electric motor installed on the main body rotates a plurality of plate cylinders and blanket cylinders for the number of colors supported on the main body, and each ink roller supported on each inking device. Driven to print.

Here, a conventional detachable inking unit 3 is provided.
A driving mechanism of a color printing machine will be briefly described with reference to FIG. Three plate cylinders 3 are arranged around the blanket cylinder 2 supported by the printer body 1 so as to contact the outer peripheral surface of the blanket cylinder 2. A gear 4 is integrally fixed to one end of each plate cylinder 3 in the axial direction, and the gear 4 meshes with each drive gear 5.

On the other hand, the inking device unit 6 is provided with the same number of inking devices 7 corresponding to the plurality of plate cylinders 3. In the inking unit 7, when the inking unit 6 is attached to the main body 1, the final inking roller 9 of each inking unit contacts the plate surface of each plate cylinder 3, and the three color inks supplied from the ink fountain are supplied to each plate cylinder 3 ni. It is arranged so that it can be attached. The inking device unit 6 also supports a plurality of driven gears 8 that are connected to the inking devices 7 via gears (not shown). When the inking device unit 6 is mounted on the main body 1, each drive gear of the main body 1 is mounted. 5 and 5 respectively.

In the conventional printing machine configured as described above, the blanket cylinder 2 and the plate cylinders 3 are rotated by the electric motor installed on the main body 1 side (not shown), and the drive gears 5 are rotated by the driven gears 8. The ink roller 9 of each inking device 7 is rotated. Therefore, the ink roller 9 is attached to the plate surface of each plate cylinder 3.
Thus, the inks of the respective colors are attached, and the supplied paper is printed by the rotation of the blanket cylinder 2.

<Problems to be Solved by the Invention> In such a conventional printing machine, the driving force of the electric motor is applied to the main body 1.
When transmitting from the inking device unit 6 to the inking device unit 6, since the driving force is transmitted to each inking device 7 for each plate cylinder 3,
The drive gears 5 and the driven gears 8 corresponding to the number of plate cylinders 3, that is, the number of colors of the ink used, are required. Therefore, the structure of the printing machine becomes complicated, leading to an increase in cost.

Further, the inking device unit 6 is detachable from the main body 1, and when the inking device unit 6 is removed from the main body 1, the driving gear 5 and the driven gear 8 are exposed to the outside from the case opening over a number of places. Resulting in. As a result, workers may come into contact with this gear and get injured during the adjustment or cleaning work of the printing press, or dust or dust such as paper dust may get inside the case opening and damage the gear. There is. Moreover, the contact portion between the main body 1 and the inking device unit 6 cannot be set in a straight line as shown in FIG. 7 due to the arrangement of the blanket cylinder 2 on each plate cylinder 3 or each ink roller 9, and the case opening described above. Is facing downward or upward. Therefore, there is a possibility that gear oil that lubricates the meshing of the gears may flow out and adhere to the plate cylinder 3 and the ink roller 9 to prevent proper printing work or damage the printing machine.

To prevent this, it may be possible to provide a cover that opens and closes in conjunction with the attachment / detachment of the inking device unit at the case opening of the main body and the inking device unit, but it is necessary to provide a cover at all of the case openings, which increases cost. In addition, the structure of the opening / closing cover may be complicated and may cause a failure of the printing press.

Further, the gears 5 and 8 of the main body 1 and the inking device unit 6 are axially supported by a frame (not shown), and when the inking device unit 6 is attached to the main body 1, the proper backlash of each gear is adjusted by the mounting position. ing. But,
It was very difficult to adjust the backlash to a constant value because the connection parts of the gears 5 and 8 were the number of ink colors.

The present invention is intended to solve such a problem and simplifies the structure to reduce the cost, and prevents the outflow of lubricating oil and the intrusion of dust and dust to provide a highly reliable printing machine. The purpose is to do.

<Means for Solving the Problems> In order to achieve the above-mentioned object, a printing machine of the present invention comprises a plurality of plate cylinders having a plurality of plate cylinders, each of which has a plurality of plate cylinders to which ink is attached by contacting each plate cylinder. In a printing machine in which an inking device unit having the inking device is detachable, a single drive gear that is driven by an electric motor that rotates the plurality of plate cylinders is provided in the printing machine main body while driving the plurality of inking devices. A single driven gear that is connected to the inking device unit when the inking device unit is mounted on the printing press body is engaged with the driving gear to transmit the driving force of the driving gear to the plurality of inking devices. It is provided.

<Operation> A plurality of plate cylinders are rotated by an electric motor and a drive gear provided in the main body of the printing machine is rotated, and this rotational driving force is transmitted to a driven gear provided in an inking unit that meshes with the drive gear, and the driven gear is driven. When the gear rotates, its rotational force is transmitted to a plurality of inking devices, and each inking device operates.

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

1 to 6 show a printer according to an embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a rear view of an inking unit showing a gear train. FIG. 3 is a detailed view of part III of FIG. 2 showing the clutch mechanism, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a detailed view of part V of FIG. And FIG. 6 is a sectional view taken along line VI-VI in FIG. 5.

The printing machine 10 includes a main body 11 and a paper feeding device 12 as shown in FIG.
It is composed of an inking device unit 13 and a paper discharging device 14, and the paper feeding device 12 and the paper discharging device 14 are connected by a bed 15 extending on the floor surface. Further, the inking unit 13 is supported by a roller 17 rotatably arranged side by side on a table 16 of the main body 11 fixed on the bed 15 so as to be movable in the left and right directions in FIG. It is designed to approach and leave.

Hereinafter, each component of the printing machine 10 will be described in detail,
Since the paper feeding device 12 and the paper discharging device 14 are not directly related to the present invention, the description thereof will be omitted. In FIG. 1, the rollers are represented by solid lines and the gears are represented by chain double-dashed lines.

First, the printer body 11 will be described with reference to FIG.
A collective blanket cylinder 20 is pivotally supported between the left and right frames 18 of the printing machine main body 11, and the three plate cylinders 21 and the collective plate cylinder 22 are brought into contact with the outer peripheral surface of the collective blanket cylinder 20 to form a frame 18 on which the blanket cylinders 21 are fitted. It is pivotally supported. A printing plate is mounted on the peripheral surface of each plate cylinder 21. A blanket cylinder 23 and an impression cylinder 24 are connected to the collecting plate cylinder 22 so as to be in contact with each other and are pivotally supported by the frame 18. As described above, in the printing machine 10, three plate cylinders 21 are arranged around the collective blanket cylinder 20, and the ink on the collective blanket cylinder 20 is adhered to the collective plate cylinder 22 to carry the ink from the plate surface. It is a satellite type offset printing machine that moves it to 23 and prints it on paper.

Gears are fixed to each body of the main body 11 in the axial direction at a time and meshed with each other, and can rotate in synchronization.
The gears are housed in a gear case 25 attached to the frame 18. In this way, this printing machine is an outside gear system that puts the gears out of the frame and puts them in a sealed gear case to block dust and dust and forcibly lubricate the tooth surfaces. Also adopts an oil shower system in which the oil sucked up from the oil tank flows down from above the gear case.

An electric motor 26 is arranged in the main body 11 and is connected to a pulley 28 via a belt 27. And this pulley 28
A gear 30 having the same diameter and an integral gear 29 fixed to one end of the impression cylinder 24.
, And the gears of each barrel are also meshed and connected. Therefore, each gear is rotated by driving the electric motor 26, and each cylinder is also rotated. Also gears
30 meshes with a sprocket 31 and a gear 32 that is integral with
This gear 32 is connected to a drive gear 34 for transmitting a driving force to the inking device unit 13 via a gear train 33. A chain 35 is engaged with the sprocket 31, and a paper (not shown) attached to the chain 35 is added to the sprocket 31 to move the chain 35 to eject the paper.
Transport to 14.

Next, the inking unit 13 will be described with reference to FIGS. 1 to 4. The inking device unit 13 includes three inking devices 41, and each inking device 41 has a group of rollers pivotally supported between the frames 40. An ink fountain 42 for supplying ink is provided at the leading end of the roller group of each inking device 41, and the last ink roller 43 of the roller group is set on each plate cylinder 21 of the main body 11 as a set of four. It is arranged so as to face each other.

As shown in FIG. 2, a gear is fixed to each roller of each inking device 41 at one end in the axial direction, and is housed in a gear case 62 in a state of meshing with each other. A driven gear 44 is arranged below the inking device unit 13 and at a drive connection portion 70 with the main body 11. The driven gear 44 is capable of meshing with the drive gear 34 of the main body 11, is connected to each clutch mechanism 46 via a gear train 45, and further, the ink roller in front of the ink roller 43 from this clutch mechanism 46 via each gear. Is connected to a gear 47 that is integral with. This clutch mechanism 46 stops the supply of the ink of one color when the printing roller is not attached to one of the plate cylinders of the main body 11 when, for example, only two of the three colors of ink are used at the time of printing. It is provided to stop the rotation.

The clutch mechanism 46 will be described below with reference to FIGS. 2 to 4.
Will be described. The clutch mechanism 46 is provided at three positions in the inking unit 13, but since it has the same structure, only the one on the upper right in FIG. 2 will be described. A pivot shaft 51 is pivotally mounted on the frame 40 and a bracket 52 fixed to the frame 40 so as to be movable in the axial direction.
A clutch gear 48 is fixed to 51. However, when this clutch gear 48 is in the position shown by the solid line in FIG. 4, it meshes with the adjacent gears 49 and 50, but when it is in the position shown by the chain double-dashed line in FIG. 4, the meshing with the gear 50 is released. Has been done. A rack 53 is axially attached to one end of the pivot 51.
And a pinion 54 that meshes with this rack 53.
Are fixed to a rotary shaft 56 supported by a bracket 55. A bevel gear 57 is fixed to one end of the rotary shaft 56, and a bevel gear 58 meshing with the bevel gear 57 is fixed to one end of an operation shaft 60 supported by a bracket 59.
The other end is exposed to the outside and a hexagonal engaging portion 61 is formed.

However, by engaging a tool (not shown) with the engaging portion 61,
When 60 is rotated, the rotating shaft 56 and the pinion 54 rotate via the bevel gears 57 and 58, and the meshing relationship between the pinion 54 and the rack 53 moves the pivot shaft 51 in the axial direction to move the clutch gear.
The engagement and disengagement of the gear 48 with the adjacent gear 50 can be performed.

Next, the drive connecting portion 70 between the main body 11 and the inking device unit 13 described above will be described with reference to FIGS. 5 and 6. The main body 11 and the inking device unit 13 are drivingly connected by the drive gear 34 and the driven gear 44 provided in the drive connecting portion 70 meshing with each other, and the driving force is transmitted from the main body 11 to the inking device unit 13.

The driven gear 44 pivotally supported by the shaft 71 on the frame 40 of the inking device unit 13 has a part of the tooth portion of the opening of the gear case 62.
It is exposed to the outside from 72, and an opening / closing cover 73 is provided in this opening 72. This open / close cover 73 is driven gear 44.
And a part of the outer circumference thereof is curved in an arc shape along the driven gear 44 and covers the tooth portion of the driven gear 44 exposed from the opening 72 of the gear case 62. Further, a spring 77 is stretched between the pin 75 fixed to the cover 73 and the pin 76 fixed to the shaft 71, and always biases the cover 73 in the direction of closing the opening 72. However, the cover 73 is in the closed position shown in FIG. 5 when the inking unit 13 is removed from the main body 11.

Further, in the main body 11, a drive gear pivotally supported by a shaft 79 on a frame 18 and a bracket 78 fixed to the frame 18.
Part of the teeth of the gear 34 is also exposed to the outside through the opening 80 of the gear case 25, and the opening 80 is also provided with an opening / closing cover 81. The opening / closing cover 81 is pivotally supported by a bracket 78 by a shaft 82, and a part of the outer periphery thereof is curved along the drive gear 34 in an arc shape and is exposed from the opening 80 of the gear case 25.
It covers 34 teeth. Furthermore, the pin fixed to the cover 81
A spring 86 is stretched between 84 and a pin 85 fixed to the bracket 78, and always biases the cover 81 in the direction of closing the opening 80. However, the cover 81 is in the closed position shown in FIG. 5 when the inking unit 13 is removed from the main body 11.

Note that the openings 72, 80 of the gear cases 25, 62 are formed on the respective vertical parts so as to face each other, and it becomes difficult for the lubricating oil adhering to the gears and the like to flow out from the openings 72, 80. There is.

In the drive connecting portion 70, the inking device unit 13 is provided on the front surface of the gear cases 62 and 25 facing the main body 11 and the inking device 13.
Rods 87 and 88 which are movable in the same direction as the moving direction of the rods are provided, and these rods 87 and 88 are located at vertically displaced positions in FIG. The front ends of the rods 87, 88 can abut each other on the front surfaces of the gear cases 25, 62, and the rear ends thereof are fixed pins 8 fixed on the open / close covers 73, 81.
It is arranged so that it can contact 9,90. Therefore, when approaching the main body 11 for mounting the inking device unit 13, the tips of the rods 89, 90 come into contact with the front surfaces of the counterpart gear cases 25, 62, and the rods 89, 90 retract. Then the rod 89,90
The rear end portion presses the engagement pins 89, 90 of the covers 73, 81, the cover 73 resists the spring 77 in the counterclockwise direction in FIG. 5, and the cover 81 resists the spring 86. Are rotated in the clockwise direction. This allows the drive gear
Opposing tooth portions of 34 and the driven gear 44 are exposed and can mesh with each other, and the main body 11 and the inking device unit 13 are connected.

Further, as shown in FIG. 6, the drive gear 34 has one end of a shaft 79 thereof extended and is connected to one end of a bell crank 92. The bell crack 92 has a middle portion pivotally attached to a bracket 91 fixed to the frame 18, and one end of a cylinder 93 attached to the frame 18 is connected to the other end. Therefore, when the bell crank 92 is rotated by the operation of the cylinder 93, the drive gear 34 axially moves via the shaft 79, as shown by the solid line and the chain double-dashed line in FIG. Incidentally, 94 is a detector for detecting the operating position of the cylinder 93.

Now, the printing principle of the printing machine of the present invention described above and the method of attaching and detaching the inking unit will be described below.

When printing with the printer 10 of the present invention, first, the electric motor 26
To rotate each gear to rotate each cylinder. On the other hand, the drive gear 34, which is also rotationally driven by the electric motor 26, meshes with the driven gear 44 of the inking device unit 13 at the drive connecting portion 70 to rotate each gear of the inking device unit 13 and each roller of the inking device 41. Then, the paper feeding device 12
The paper sent from is conveyed to the printing machine main body 11, while
The ink supplied from each ink fountain 42 of each inking device 41 is kneaded and spread by each roller to form an uniform ink film, and each ink roller 43 adheres to the plate surface of each plate cylinder 21. Therefore, an image is formed on the plate surface of the plate cylinder 21 and the collective blank cylinder 2
The image is transferred in the order of 0, the collective plate cylinder 22, and the blanket cylinder 23, and by applying a printing pressure to the paper passing between the impression cylinder 24 and the blanket cylinder 23, this image is transferred and printed. Then, the paper after printing is gripped by the claws of the chain 35 and conveyed, and is discharged by the paper discharge device 14. The printing operation is continuously performed by repeating this series of operations.

When printing is completed and ink is prepared, each roller is cleaned, printing pressure is adjusted, etc.
13 is moved to the position shown by the alternate long and two short dashes line in FIG. At this time, the main body 11 to the inking unit 13
With the gears removed, the openings 80,72 in each gear case 25,62
Is covered with the covers 81, 73 by the action of the springs 77, 86, so that the outflow of lubricating oil and the like is prevented.

When the inking unit 13 is attached to the main body 11 again, the inking unit 13 at the position shown by the chain double-dashed line in FIG. Then, the opening / closing covers 73, 81 are rotated by the operation of the rods 87, 88 provided on the front surfaces of the gear cases 62, 25, and the facing tooth portions of the drive gear 34 and the driven gear 44 are exposed to the outside. At this time, the driving gear 34 is driven by the driven gear 44 facing the driving gear 44.
In the position indicated by the alternate long and two short dashes line in FIG. Then, after connection, the cylinder 93 is operated to rotate the bell crank 92 counterclockwise in FIG. Then the axis
The drive gear 34 moves downward in FIG.
Mesh with. In this meshing, the teeth of both gears 34 and 44 may not mesh well and the drive gear 34 may not move to the normal position. In this case, the operation of the cylinder 93 is stopped halfway. Therefore, the position of this cylinder 93 is detected by the detector.
If 94 detects and stops midway, the drive gear 34 is slightly rotated to mesh with the driven gear. And the drive gear 34
After adjusting both gears 34, 44 to an appropriate backlash according to the device position of the inking device unit 13 with respect to the main body 11 with the driven gear 44 meshing with the main gear 11, the inking device unit 13 is fixed to the main body 11 by a fixing means (not shown). To do. Then, the printing operation can be performed again.

As described above, according to the printing machine 10 of the present invention, since the drive connecting portion 70 between the main body 11 and the inking device unit 13 is provided at one place, the structure of the printing machine itself is simplified and the cost is reduced, and Adjustment work of the lash is easy and the reliability of the printing press is improved. Further, since the drive connecting portion 70 is formed by forming an opening in the vertical portion of the main body 11 and the inking device unit 13 and further providing the opening / closing covers 73, 81, the lubricating oil of the gear is removed when the inking device unit 13 is removed. It will not flow out, and will prevent dust and dirt from entering the gear case. Further, the drive gear 34 and the driven gear 44
Since the tooth portion of is not exposed, there is no danger of contacting the gears 34, 44 during cleaning of the inking unit 13.

<Effects of the Invention> As described above in detail with reference to the embodiments, according to the printing machine of the present invention, the driven gear is provided in the main body of the printing machine while being driven and connected to the inking unit of the inking unit. The main body and the inking device unit are drive-connected by engaging both gears, and the driving force of the electric motor is transmitted to each inking device via the drive gear and the driven gear. Since there is only one drive connecting portion, it is not necessary to provide a drive gear and a driven gear for each plate cylinder, and the structure of the entire printing press can be simplified and the cost can be reduced. Further, the backlash between the drive gear and the driven gear can be easily adjusted only by adjusting the fixing position of the inking unit with respect to the main body.

[Brief description of drawings]

1 to 6 show a printing machine according to an embodiment of the present invention, in which FIG. 1 is a front view and FIG. 2 is a rear view of an inking device showing a gear train, Figure 3 is Figure 2 III
FIG. 4 is a detailed view of a portion showing a clutch mechanism, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a detailed view of portion V in FIG. 1 showing a drive connecting portion of a main body and an inking device. 6 is a sectional view taken along line VI-VI of FIG. 5, and FIG. 7 is a schematic front view of a conventional printing machine. In the drawing, 10 is a printing machine, 11 is a printing machine main body, 13 is an inking device unit, 21 is a plate cylinder, 26 is an electric motor, 34 is a drive gear, 41 is an inking device, 44 is a driven gear, 46 is a clutch mechanism, 70 Is a drive connecting portion, and 73 and 81 are opening and closing covers.

Claims (1)

[Scope of utility model registration request] 1. A printing machine in which an inking device unit having a plurality of inking devices for contacting each of the plate cylinders and adhering ink to the printing press body having a plurality of plate cylinders is detachable. A single drive gear that is driven by an electric motor that rotates the plate cylinder is provided on the printing press main body, and is connected to the plurality of inking devices while the inking device unit is mounted on the printing press main body. A printing machine, wherein a single driven gear that meshes with a driving gear and transmits the driving force of the driving gear to the plurality of inking units is provided in the inking unit.