JPH0349753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inking device for supplying printing ink to a printing wheel of a number printing machine.

Number printing, in which consecutive numbers are printed on securities, direct mail, New Year's postcards, etc., is generally done by reprinting printed matter that has been preprinted using an offset printing device, etc., and is performed using an independent number printing machine. Alternatively, the number printing may be performed by a printing unit for number printing provided at the rear of the printing unit for printing the picture. This type of number printing machine is equipped with a printing wheel for the required number of digits, which feeds one character each time a sheet is printed, and further advances each 10 characters. Ink stored in an ink fountain is supplied via a large number of rollers.

However, when printing consecutive numbers using this number printing machine, the second digit is printed at 1/1 of the first digit.
10. Furthermore, there is a large difference in the frequency of printing depending on the digit, such as the printing of the third digit is 1/10 of the printing of the second digit, and the printing of the upper digit that is used for the first time after being shifted By then, not much ink has adhered to the paper, so it prints out faintly, and there are problems with the print being dark and light depending on the digits.

Therefore, in the past, before passing the printing paper through, the number printing machine was first run idly in the printing state, that is, in the cylinder loading state with the number cylinder facing the impression cylinder, and each print was sent one by one, so that all the prints were completed in advance. The process of applying ink is underway. However, when performing the above-mentioned work on a printing press that is equipped with an offset printing unit and a number printing unit in series, it is necessary to operate the offset printing unit in a non-printing state, that is, with the blanket cylinder separated from the plate cylinder and the impression cylinder. It must be in the removed state and only the number printing unit must be in the case. Therefore, not only does the electrical circuit that controls the attachment and detachment of the cylinder become complicated, but also because the number printing unit is inserted into the cylinder without printing paper passing through it, there is no printing pressure between the number cylinder and the impression cylinder. As a result, the impression cylinder becomes dirty, and it is necessary to perform the troublesome work of removing the cylinder and washing the impression cylinder before printing starts, which is extremely inefficient.

The present invention was developed in view of the above points, and includes a roller arm that individually supports a plurality of forming rollers, and the nip pressure between each forming roller and the number cylinder is adjusted by moving back and forth in the axial direction. An adjustment rod is attached, one end of which is slidably supported by a bearing, and these bearings are each supported on the rotating end side of a support member that is rotatably supported on the fuselage side, and the rotation of this support member is A plurality of rollers are simultaneously moved to follow the insertion and removal state of the number cylinder, and stoppers are provided to respectively restrict both ends of rotation of the support member, and the support member is in contact with one of the stoppers. The nip pressure between the inking roller and the number cylinder in the inserted state is set, and ink is applied to the printing ring of the number cylinder in the removed state with the support member in contact with the other stopper. By configuring this, it is possible to switch between applying ink to the printing wheel of the number cylinder in the removed state with a simple operation without changing the nip pressure position during printing with the number cylinder inserted. The present invention provides an inking device for a number printing machine.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

1 to 4 show an example in which the inking device according to the present invention is implemented in a number printing machine of an offset rotary printing press, FIG. 1 is a schematic side view of the number printing machine in which this is implemented, and FIG. 2 is a FIG. 3 is a front view of the rotating means of the bearing support member, and FIG. 4 is a longitudinal cross-sectional view of the bearing support member and its rotating means. In these figures, the number printing machine 1 includes an impression cylinder 3 disposed with a paper transfer cylinder 2 interposed between a printing unit in the front stage and a paper discharge device in the rear stage.
Above the impression cylinder 3, there is provided a number cylinder 4 having a rotating printing wheel (not shown) mounted on its circumferential surface. This number cylinder 4 is rotatably supported by the inner circumferential shaft hole of an eccentric bearing 5 in which the axis F of the outer circumferential circle and the axis _F1 of the inner circumferential shaft hole are eccentric,
Further, the eccentric bearing 5 is rotatably supported by the frame 6 at its outer peripheral portion. And eccentric bearing 5
By rotating with a rotating means (not shown), the axis of the inner circumferential shaft hole moves from F ₁ to F ₂ , and when the axis is at F ₁ , the number cylinder 4 is under pressure as shown by the solid line in the figure. It is in a state of being inserted into the body by facing the body 3, and the axis is F ₂
, the number cylinder 4 is separated from the impression cylinder 3 to be in the cylinder-removed state, as shown by the chain line in the figure.

Further, above the number cylinder 4, there is provided an inking device, generally designated by the reference numeral 7. This inking device 7 is equipped with an ink pot 8 for storing ink, and a pot roller 9 for carrying around the ink flowing out from the pot and forming an ink film on the circumferential surface of the pot roller 9. A transfer roller 11 is provided which reciprocates between this and the shaking roller 10 to transfer the ink on the pot roller 9 to the shaking roller 10. On the other hand, an inking device 12 is provided above the number cylinder 4, the details of which are shown in FIGS. 2 to 4.
0, a large number of roller groups 14 are provided which knead the ink on the shaking roller 10 and supply it to the shaking roller 13 of the inking device 12.

Then, the swinging roller 13 of the inking device 12
is rotatably supported by the frame 6, and a pair of roller arms 16 and 17 are rotatably fitted to the outer periphery of a bearing 15 that supports the frame 6. Forming rollers 18 and 19, which rotate in contact with the circumferential surface of the number cylinder 4, are pivotally supported on the rollers 16 and 17. Further, both roller arms 16 and 17 are integrally formed with rod attachment portions 16a and 17a that protrude upward.
Further, an arm shaft 20 is provided obliquely above the swinging roller 13 and is rotatably supported by the frame 6. A support arm 21 as a bearing support member is attached to the frame 6. The central part is attached adjacent to the inside of the shaft. Bearings 22 are rotatably supported on both free end portions of the support arm 21 extending vertically from the shaft attachment portion, and these bearings 2
2 and the mounting portion 16 of the roller arms 16, 17.
a, 17a are connected by an adjustment rod 23. That is, one end of the adjustment rod 23 is slidably supported by the bearing 22, and the other end is pivotally connected to the mounting portions 16a and 17a, and the threaded portion protruding from the bearing 22 is fitted with a spanner. An adjusting nut 24 having a hole and a grooved collar is screwed onto it. Further, a compression coil spring 26 is interposed between the bearing 22 and a collar 25 provided on the adjustment rod 23 to bias the adjustment rod 23 toward the mounting portions 16a and 17a. And adjustment nut 2
By applying a spanner to the spanner engagement hole 4 and rotating it, the adjustment rod 23 advances and retreats in the axial direction with respect to the bearing 22, and the roller arms 16 and 17 swing to align the rollers 18 and 19 with the number cylinder. The nip pressure with respect to 4 is adjusted. Furthermore, a clip spring 27 is fixed to the bearing 22, which engages with a groove in the grooved flange of the adjustment nut 24 and locks the rotation of the adjustment rod 23 at the nip pressure adjustment position.

A worm wheel 28 and a cam 29 are adjacently attached to the protruding portion of the arm shaft 20 to the outside of the frame 6.
A worm shaft 31 is rotatably supported by a worm bearing 30 mounted on the outside of the worm shaft 30 , and a worm 32 on this worm shaft 31 is meshed with a worm wheel 28 . And the worm shaft 31
By gripping the handle 33 provided at the shaft end of the worm shaft 31 and rotating the worm shaft 31, the arm shaft 20 is rotated through the worm 32 and the worm wheel 28.
is configured to rotate.

On the other hand, on the inside of the frame 6, there are provided stoppers 34 and 35, which are comprised of studs implanted in the frame 6 and bolts screwed into the studs so as to be able to move forward and backward, and restrict both ends of rotation of the support arm 21. It is being Further, below the cam 29, a contact point is closed by the large diameter portion of the cam 29 when the arm shaft 20 is rotated until the support arm 21 comes into contact with the lower stopper 35. A limit switch 36 is provided supported by the frame 6 for closing the number cylinder 4 and disabling the number cylinder 4 from being inserted. Note that the adjustment of the length of the rod 23 by the adjustment nut 24 and the adjustment of the stop position of the support arm 21 by the stoppers 34 and 35 are both for fine adjustment, such as correction of thermal expansion and manufacturing errors. Therefore, the length of the rod 23 and the support arm 21, the pivot position, and the stopper 3
4, 35 mounting position and roller arm 16,
Needless to say, the length of 17 is designed to minimize the change in nip pressure when inserting the shell and removing the shell.

The operation of the number printing machine 1 configured as above will be explained. First, prior to printing work, when the eccentric bearing 5 is rotated to move the axis of the inner circumferential shaft hole from _F2 to _F1 , the number cylinder 4 comes into contact with the impression cylinder 3 and enters the cylinder insertion state. Then, when the worm shaft 31 is rotated and the support arm 21 is rotated counterclockwise in FIG. 2 until it contacts the upper stopper 34, the roller arm 16 is rotated counterclockwise in FIG. Since the roller arm 17 rotates clockwise, both the rollers 18 and 19 move simultaneously to the number cylinder 4.
Follow the direction of movement. Therefore, adjust the adjustment nut 24.
By rotating the adjusting rod 23 and moving it forward and backward, the roller arms 16 and 17 are swung to adjust the nip pressure between the forming rollers 18 and 19 and the number cylinder 4. After adjustment, the nip pressure does not change because it is biased by the compression coil spring 26 and locked by the click spring 27.

After adjusting the nip pressure in this way, the second
As shown by the chain line in the figure, the eccentric bearing 5 of the number cylinder 4 is rotated to remove the cylinder, and the worm shaft 31
When the support arm 21 is rotated clockwise in FIG. 2 until it comes into contact with the lower stopper 35, the roller arm 16 moves clockwise and the roller arm 17 moves counterclockwise via the adjustment rod 23 as shown in chain lines. Since it rotates as shown in
9 follows the cut number cylinder 4 and comes into contact with its circumferential surface. When the machine is operated in this state, the ink in the ink fountain 8 will be absorbed by each roller 9, 11, 10, the roller group 14, the swinging roller 13, and the formation roller 1.
8 and 19, and is attached to the printing ring on the number cylinder 4,
By stopping the machine at appropriate rotations and performing shift feeding, ink is deposited evenly on each print on the printing wheel. In this case, since the nip pressure of the forming rollers 18 and 19 against the number cylinder 4 is adjusted based on the time of cylinder insertion, that is, the time of printing, strictly speaking, it may not be an appropriate nip pressure. However, since the cylinder is in an unloaded state, that is, in a non-printing state, the ink simply needs to be transferred to the number cylinder 4 side, so the nip pressure does not need to be very strict and there is no particular problem. During this operation, the limit switch 36 is closed by contact with the large diameter portion of the cam 29, so that the number cylinder 4 is not inserted into the cylinder and is safe.

After ink is applied to the printing wheel of the number cylinder 4 in this way, the worm shaft 31 is rotated to return the ink rollers 18 and 19 to the state at the time of adjusting the nip pressure, that is, the state in which printing is possible. Preparation for printing is completed by loading the number cylinder 4, so when the machine is operated, the paper with the pattern printed on it by the printing unit in the front stage is flowed between the number cylinder 4 and the impression cylinder 3. Sequential numbers are reprinted.

During the above-described inking operation on the printing wheel of the number cylinder 4, even if the worm 31 is rotated and the bearing 22 is advanced or retreated via the support arm 20, the relative position between the bearing 22 and the adjustment rod 23 changes. After this, ink forming roller 1
When the number cylinders 8 and 19 are brought into contact with the number cylinder 4 and ready for printing, the nip pressure between the ink forming rollers 18 and 19 and the number cylinder 4, which has been adjusted and set in advance as described above, is reproduced as is. Therefore, there is no need for readjustment. By rotating the worm shaft 31, a plurality of rollers 18 and 19 are simultaneously moved onto the number cylinder 4.
It is extremely easy to operate. Further, since the printing wheel is inked while the number cylinder 4 is in the removed state, ink does not adhere to the impression cylinder 3.

In this embodiment, an example was shown in which the two forming rollers 18 and 19 are moved simultaneously by the rotation of the worm shaft 31, but the support arm 21 is connected to the other forming roller arm, and the roller arm By appropriately setting the length, etc., three or more rollers can be moved simultaneously. Further, in this embodiment, an example was shown in which the present invention was implemented in a number printing machine of an offset rotary printing press, but it goes without saying that it can also be implemented in an independent number printing machine.

As is clear from the above description, according to the present invention, in an inking device of a number printing machine, a roller arm that individually supports a plurality of forming rollers is moved back and forth in the axial direction to connect each forming roller. An adjustment rod for adjusting the nip pressure with the number cylinder is attached, one end of which is slidably supported by a bearing, and these bearings are attached to the rotating end side of a support member rotatably supported on the aircraft body side. The rotation of the support member causes a plurality of rollers to simultaneously follow the state of insertion and removal of the number cylinder, and the support member is provided with a stopper for restricting both ends of rotation of the support member. Set the nip pressure between the ink forming roller and the number cylinder in the cylinder-in state when it is in contact with one stopper, and the printing wheel of the number cylinder in the cylinder-removed state with the support member in contact with the other stopper. By configuring the system to apply ink to the printing wheel of the number cylinder, the number cylinder is in an uncircumcised state and the nip pressure between the number cylinder and the forming roller set for printing is changed. This allows the amount of ink deposited for each print to be averaged, making it possible to print numbers with no shading between each digit, and improving work efficiency as there is no need to wash the impression cylinder before printing starts. do. Furthermore, the operation of the formation rollers to follow the number cylinder can be performed simultaneously by a plurality of formation rollers, and the operation is extremely simple and efficient. Furthermore, when attached to an offset printing machine, since both the offset printing unit and the number printing unit can be removed from the cylinder to apply ink to the printing wheel, the electric control circuit can be simplified.

[Brief explanation of drawings]

1 to 4 show an inking device for a number printing machine according to the present invention, FIG. 1 is a schematic side view of a number printing machine in which this is implemented, FIG. 3 is a front view of the rotating means for the bearing support member, and FIG. 4 is a longitudinal sectional view of the bearing support member and its rotating means. 1...Number printing machine, 3...Impression cylinder, 4...Number cylinder, 5...
Eccentric bearing, 7... Inking device, 16, 17... Roller arm, 18, 19... Forming roller, 21... Support member, 22... Bearing, 23... Adjustment rod, 28... Worm foil, 31... Worm shaft, 32... Worm.

Claims (1)

[Claims] 1 A number cylinder 4 that is attached to and removed from the impression cylinder 3 by the rotation of an eccentric bearing 5 and inserted and removed, and a number cylinder 4 that is supported by rotatable and pivotally supported roller arms 16 and 17, respectively, and is attached to and removed from the impression cylinder 3. Contacting rollers 18 and 19
One end is pivotally connected to the roller arms 16, 17, and the other end is slidably supported by bearings 22, 22, so that the respective forming rollers 18, 1 are slidably supported by the bearings 22, 22.
9 and a plurality of adjustment rods 23, 23 for adjusting the nip pressure between the number cylinder 4, the plurality of bearings 22, 22 are connected to the support member 21.
a rotating device rotatably provided at rotating ends extending in different directions, the supporting member 21 is rotatably supported on the aircraft body side, and a rotating device for rotating the supporting member 21; An inking device for a number printing machine, characterized in that stoppers 34 and 35 are provided which are movable and adjustable in a regulating direction to respectively regulate both ends of rotation.