JPH0458791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied to a rotary printing press using web paper, which is disposed in the running path of paper to support the paper, change the running direction of the paper, and prevent lateral deviation of the paper. The present invention relates to wiping and cleaning of guide rollers that prevent paper wrinkles and assist the running of the paper, and particularly relates to a method and device for wiping guide rollers piled with undried ink immediately after printing.

BACKGROUND TECHNOLOGY Ink biling on the circumferential surface of the guide roller in the above-mentioned rotary printing press is a major problem in the printing process. Efforts have been made to prevent ink blistering from occurring on the surface, such as in Utility Model Publication No. 36-22312,
The one shown in Utility Model Publication No. 39-26949 is well known.

That is, what is shown in Japanese Utility Model Publication No. 36-22312 is that (a) porous hard chrome plating is applied to the outer circumferential surface of the roller to create a roller circumferential surface with extremely irregular and fine irregularities; ) Reduces the area of the contact area with the running paper on the outer circumferential surface of the roller, (c) Utilizes the relatively high grease-insensitivity inherent in chromium, and (d) Transfers undried ink from the printed surface to the roller circumferential surface. The aim is to prevent the above-mentioned buying by arranging difficult conditions.

Furthermore, the example shown in Japanese Utility Model Publication No. 39-26946 is as follows: (a) A plurality of small holes are drilled at appropriate positions on the outer circumferential surface,
Moreover, an outer cylinder having a plurality of small holes drilled at appropriate intervals on the entire outer circumference of the roller is rotatably attached to the hollow shaft, which has one end open and the other end closed, via a bearing that rotates the outer ring. The open end of the shaft is connected to a compressed air source. (b) Normally, air from the compressed air source passes through a small hole in the hollow shaft and a small hole in the outer cylinder and is blown out to the outside of the roller. (c) In the event that the running paper comes into contact with the roller circumferential surface,
(d) By providing conditions that can minimize the chances of undried ink on the printing surface being transferred to the roller circumferential surface, the outer cylinder rotates at the same circumferential speed along with the running paper. It was an attempt to prevent the ring from forming.

Problems to be Solved by the Invention However, with the recent increase in printing speed and printing amount, the process of preventing ink biling in the conventionally known technology described above has been improved. However, methods that reduce the contact area or contact opportunities with the printing surface were not sufficiently effective, and ink blistering occurred on the roller circumferential surface. As mentioned above, wiping of the biling ink is necessary, and this is done exclusively by hand, which is inefficient and requires a large amount of man-hours, and the guide rollers are usually installed at a high place. This has led to major problems in terms of work safety.

Means for Solving the Problems The present invention has been developed in view of the above-mentioned problems, and the cleaning of the guide rollers on which ink has accumulated can be completed in a short period of time without relying on human hands, thereby improving work efficiency. To provide a method and device for cleaning guide rollers in a rotary printing press, which can improve the cleaning process, relieve workers from complicated work at high places, and have a great effect on work safety. The purpose is to
This method uses guide rollers 12 and 1 arranged in the running path of the printing paper 11 and rotating in contact with the printing paper in a rotary printing machine in which a web is used as a printing paper 11 and printing is performed by running the printing paper 11 along a running path.
The rotating circumferential speed of 2,... is slightly different from the running speed of the paper 11, and the ink piled on the surface of the guide rollers 12, 12,... is wiped off by the running paper 11 due to slippage due to this speed difference. This is a method for implementing this method, and the configuration of an apparatus for carrying out this method is such that, in the rotary printing press described above, the shafts of guide rollers 12, 12, . The section 12a is connected to a rotational speed control device that controls the rotational peripheral speed of the guide rollers 12, 12, . . . to be slightly different from the running speed of the paper 11.

Function The guide roller is rotated at a circumferential speed that is slightly different from the running speed of the paper, and slippage occurs between the running paper and the circumferential surface of the guide roller, and this slippage creates a bias on the circumferential surface of the guide roller. The ringed ink is wiped clean.

Example Embodiments of the present invention will be described based on the drawings.

When printing newspapers using a rotary printing press, for example, an offset rotary printing press, as shown in FIG. Normally, printing is performed by configuring one printing set, and the paper 11 emitted from the roll paper attached to a paper feed unit (not shown) provided for each printing unit 10, 10, . . . The paper is threaded through the paper to the folding section 16, and is sequentially pulled by the blanket cylinders 10a, 10a of the printing section 10 and the drag roller 13, and then guided by the guide rollers 12, 12, . . .
The slitter 13 is supported by the drag roller 13 and the running direction is changed.
A is cut in the longitudinal direction by a turning bar 14 provided on the downstream side of the cut part, and the cut part is brought to the other side by the turning bar 14 provided on the downstream side. It is supported by the guide rollers 12, 12, . . . and is introduced into the folding section 16 while the running direction is changed.

The present invention is effective not only for the guide roller in the vicinity of the downstream side of the printing unit 10 in the rotary printing press, which is the part that is most likely to be inked, but also for all other guide rollers. As shown in Figure 1.

That is, each end of the shaft portions 12a, 12a extending to both ends of the guide roller 12 is connected to the bearing 1.
It is supported by a machine base (not shown) via shafts 7 and 17, and a pulley 18 is fixed to one of the shafts 12a, 12a. Further, the machine base is provided with a drive unit 20 having a pulley 18a fixed to an output shaft 20a, and an endless belt 19 is stretched between the two pulleys 18a, 18a.
8, 18a, endless belt 19, drive section 20
The drive means 30 for the guide roller consists of the following, and a clutch 40 is provided in a part of the drive means 30. When the clutch 40 is installed on the driven-side pulley 18, for example, as shown in FIG. A movable element 43, to which a clutch disk 41 is fixed and another clutch disk 42 is fixed opposite thereto, is provided on the shaft part 12a of the guide roller 12 so as to be slidable only in the axial direction of the shaft part 12a, and The movable element 43 may be fixed to a machine base (not shown) via a sliding drive means 44 and a bracket 45 for slidingly driving the movable element 43. Further, if necessary, as shown in FIG. 3, a cleaning liquid supply means 50 is provided near the guide roller 12 for supplying cleaning liquid to an area somewhat narrower than the width of the running paper 11.

Next, the operation in the above configuration, that is, the wiping and cleaning of the guide roller 12 will be explained with reference to the operation system diagram shown in FIG.

After printing is completed, the signal means 61 sends an activation signal to the wiping device control section 62. The control unit 62 is constantly sent the running speed data of the paper 11 detected by the circumferential speed detection means 63 provided in the drag rollers 13 and 15, which are the running power units for the paper 11, and receives the above-mentioned activation signal. The control unit 62 starts the drive unit 20, which is a drive means for the guide roller 12, so that the circumferential speed of the guide roller 12 can be rotated at a speed slightly different from the running speed of the paper 11, that is, slightly faster or slower. let At the same time, in order to slide the movable member 43 provided on the shaft portion 12a of the guide roller 12, the sliding drive means 44 is driven via, for example, an electromagnetic valve 46, and the clutch 40 is moved.
The guide roller 12 is driven so that the paper 11 slips between the circumferential surface of the guide roller 12 and the running paper 11 to the extent that the paper 11 does not break. Wipe the surface.

Next, check the wiping state and send a stop signal as appropriate.
The drive unit 20 is stopped via the control unit 62, and the clutch 40 is separated to allow the guide roller 12 to freely rotate.

The timing of stopping the driving section 20 and releasing the clutch 40 may be set by a timer.

Further, when the cleaning liquid supply means 50 is provided near the guide roller 12, the control section 62 may send an activation signal to supply the cleaning liquid in accordance with the wiping strips. The cleaning liquid may be supplied as appropriate.

Furthermore, the cleaning liquid may be supplied directly to the circumferential surface of the guide roller 12 or may be supplied directly to the circumferential surface of the guide roller 12.
2, it may be applied to the paper 11 running near the upstream side.

In FIGS. 1 and 4, one drive unit 20
Although it is shown that the endless belt 19 is driven to rotate through a plurality of guide rollers 12, if the endless belt 19 is also passed through a pulley provided on the shaft of another guide roller (not shown), one drive unit 20 can drive a plurality of A driving means 30 may be configured to rotationally drive the guide roller. Further, in this embodiment, the drive unit 20 is shown as an independent drive body, but it may be a drive body that obtains power from a drive unit of a rotary printing press and outputs it. In this case, when the drag rollers 13, 15, which are the driving power section for the paper 11, also receive power from the drive section of the rotary printing press, the circumferential speed detection means 63 shown in FIG.
is unnecessary, and the gear ratio etc. may be set in advance so that the drive rotation peripheral speed of the guide roller 12 is slightly different from the traveling speed of the paper 11 which is being pulled by the drag rollers 13 and 15.

In FIG. 4, the wiping operation is shown assuming the case after printing is completed, and the above explanation also follows this. The guide roller 12 can be wiped clean. When wiping the guide roller 12 at the paper splicing section, a paper splicing signal from a paper feed section (not shown) is sent to the wiping device control section 62 as a wiping device activation signal, and the position of the guide roller 12 to be wiped is adjusted as described above. The approximate timing at which the waste paper passes through the paper splicing section is detected by a counter or timer, and the clutch 40 is spliced.
It is sufficient to issue a separation signal and a start/stop signal for the drive section 20.

Note that the structure of the clutch 40 is not necessarily the same as that of the first clutch 40.
It is not necessary to use the structure shown in FIGS. 2 and 2, that is, the structure provided on the shaft portion 12a of the guide roller 12 separately from the drive section 20, and as shown in FIG. pulley 18a on the drive side
A shoe 40a may also be provided.

In the above embodiment, the shaft portion 12a of the guide roller 12 is driven at a driving speed different from the running speed of the paper 11 via the clutches 40, 40a as a means for making the circumferential rotational speed of the guide roller 12 different from the running speed of the paper 11. Although an example in which the guide roller 12 is connected to the section 20 is shown, as a means for making the rotation peripheral speed of the guide roller 12 different from the running speed of the paper 11, the guide roller 12 is supported so as to freely rotate, and a brake is applied to the guide roller 12. The peripheral speed of the guide roller 12 and the running speed of the paper 11 may be changed by activating the brake.As shown in FIG.
The shaft portion 12a of No. 2, without using a clutch,
It may be connected to a drive section 20 via pulleys 18 and 18a, and driven by this drive section 20 so that the circumferential rotational speed of the guide roller 12 is different from the running speed of the paper 11.

Furthermore, it is also effective to combine a mechanical or electromagnetic speed change mechanism with the clutches 40, 40a, and provide a stepwise or stepless speed change function in the connection between the pulleys 18, 18a and the endless belt. also gives similar results.

Effects of the Invention According to the present invention, the threaded paper 11 is run as in the case of printing, and the guide rollers 12 and 1 rotate in contact with the running paper 11.
The peripheral speed of rotation of the paper 11 is slightly different from the running speed of the paper 11, and the guide rollers 12, 12, . By rubbing and wiping the peripheral surface of the guide rollers 12, 12, etc., (a) the guide rollers 12, 12, ... can be wiped following the printing process, and (b) each guide roller 12, 12, ... can be wiped at once. (c) The paper 11 used for wiping can be treated in the same way as printed waste paper; (d) The paper 11 is further run, and the circumferential speed of the guide rollers 12, 12, ... is adjusted to the running speed of the paper 11. It has direct effects such as being able to achieve the purpose just by making it different from the above, and these effects are combined to make it unnecessary to rely on manual cleaning of the guide rollers 12, 12, etc. where ink has piled up. Moreover, it can be completed in a short time, which saves labor and improves work efficiency.It also frees workers from complicated work at heights, improving work safety. It is possible to achieve effects such as reduction in running costs including labor costs, and no need to take special consideration in the disposal of waste materials generated by wiping.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic perspective view showing the main parts of the device of the present invention, and FIG. 2 is a schematic sectional view of a clutch provided on the driven side pulley.
FIG. 3 is a schematic installation diagram of the cleaning liquid supply device, FIG. 4 is an operational system diagram of the device of the present invention, and FIG. 5 is a schematic front view of a rotary printing press that can be equipped with the wiping device of the present invention.
FIG. 6 is a schematic cross-sectional view of a clutch provided on the pulley portion on the drive side, and FIG. 7 is a perspective view showing another embodiment of the main part. 11 is a paper, 12 is a guide roller, 12a is a shaft portion, 20 is a drive portion, and 40, 40a are clutches.

Claims (1)

[Scope of Claims] 1. In a rotary printing machine in which a roll of paper is used as a paper 11 and printing is performed by running this paper 11 along a running route, a guide that is placed on the running route of the paper 11 and rotates in contact with the paper. Rollers 12, 12,...
The rotating circumferential speed of the guide rollers 12 is slightly different from the running speed of the paper 11, and the ink piled on the surface of the guide rollers 12, 12, . A guide roller wiping method in a rotary printing press, characterized in that: 2. In a rotary printing machine in which a roll of paper is used as a paper 11 and printing is performed by running this paper 11 along a running path, guide rollers 12, 1 are placed in the running path of the paper 11 and rotate in contact with the paper 11.
This guide roller 12,
A guide roller wiping device for a rotary printing press, characterized in that a rotational speed control device is connected to control the rotational peripheral speed of the guide rollers 12, . . . to be slightly different from the running speed of the paper 11. 3. The rotary printing machine according to claim 1, characterized in that the peripheral speed of rotation of the guide rollers 12, 12, ... can be freely switched between the same speed as the running speed of the paper 11 and a speed slightly different Guide roller wiping method. 4 Shaft portion 12a of guide rollers 12, 12,...
A guide roller wiping method for a rotary printing press according to claim 2, wherein the drive unit 20 is connected to the drive unit 20 via a clutch 40.