JPH0957948A - Inking device for printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a driving system of three vibrating rollers which rotates round a large-diameter ink attaching roller by friction so as to prevent slipping among rollers and eliminate floating of the vibrating rollers even at a high speed rotation. SOLUTION: A vibrating roller 3 which is supported by a fixed bearing of a frame 1 and is to be driven by positioning of an attached vibrating roller gear 12 in the outside of the frame, and a plurality of vibrating rollers 4 and 5 supported by a fixed bearing of a rocking member 15, from which added vibrating roller gears 18 and 19 protrude to the outside from a window hole 17 of the frame 1, are provided. Further, a gear support pin provided in a back to back arrangement with a large-diameter ink attaching roller 7 to be supported by the inside of the rocking member 15 passes the window hole 17 and supports an intermediate gear 23 having the same diameter as that of the large-diameter ink attaching roller so as to be at the same central position and to directly mesh with the gears 12, 18, and 19 of the vibrating roller 3, 4, and 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a large-diameter inking roller to supply ink to a printing plate.
The present invention mainly relates to improvement of an inking device used in an offset printing machine, a form printing machine or the like.

[0002]

2. Description of the Related Art Ink intermittently called up from an ink fountain is well kneaded and spread while passing through many rollers such as an ink leveling roller, an intermediate rubber roller, a lidar roller, and a oscillating roller, and 4 to 3 inks are applied. The conventional structure of the conventional inking device is that the plate is inked through the roller. The inking roller has a relatively small diameter so that it can be arranged on the circumferential surface of the plate cylinder at an angle of about 90 degrees. Therefore, the lateral swing roller in contact with the ink fountain roller has to be configured such that one lateral fountain roller is in contact with two ink fountain rollers or one-to-one contact with the ink fountain roller. Although there are various types of roller arrangements that take this type of form in the related art, even if there are some differences in the roller arrangement leading to the inking roller, they are all the same, and drastic improvements have been made so far. Can't be seen. In particular, in an offset printing machine, since dampening water is used, it is often the case that it is difficult to deal with ghosts and other printing problems due to entanglement with ink.

In order to eliminate the above-mentioned drawbacks, an inking device using a large-diameter inking roller has been proposed by the present applicant and is disclosed in Japanese Patent Publication No. 36-13767.

The above-mentioned proposal is such that one rotation of a large-diameter inking roller causes ink to be deposited over substantially the entire plate surface, and this is a structure in which rotation is provided in contact with two or more oscillating rollers and the plate cylinder. . This invention has been put into practice, and an offset printing machine MT-3 manufactured by Akiyama Kikai Seisakusho Co., Ltd.
Since it was installed in 0 and made a considerable achievement, it was proved that its aim was correct.

Since then, various improvements have been made to the roller arrangement using the large-diameter inking roller. In the process, it is important that one rotation makes the whole plate surface inked as much as initially thought. It turns out that I have no ambition. More importantly, it is sufficient that the ink forming roller has a sufficiently large diameter so that rotation can be given in contact with a plurality of oscillating rollers, and of course, the ink forming roller does not slip and the plate surface is not slipped. It was to rotate in accordance with the peripheral speed.

What is disclosed in the embodiment of Japanese Patent Publication No. 56-16748 is also proposed by the applicant of the present invention, but in terms of roller arrangement, a lateral swing roller having two or more large-diameter inking rollers. It is the same as the structure in which rotation is applied in contact with the plate cylinder. The thing at this time is not obsessed with inking in almost the whole plate in one rotation.

In the previous two examples, no reference is made to the drive system of the oscillating roller, but in implementing the same, the rotation of the plate cylinder is mediated by an intermediate gear like the well-known conventional inking device. There is no change in that it is linked to each roll roller. In addition, Japanese Examined Japanese Patent Publication 56-1674
As shown in No. 8, the large-diameter inking roller is supported by a swing member, and one end of this swing member is swingably fitted to the outer periphery of a bearing member supporting the swing roller on a frame. However, the other end is also connected to a roller lifting device, and when the roller lifting device operates, the roller lifting mechanism that separates from or contacts the plate cylinder while keeping the contact of the inking roller with the lateral swing roller, There is no change as a general rule.

However, in order to rotationally drive the other oscillating roller which is movable with the oscillating member on the large-diameter inking roller, the arrangement of the intermediate gear is restricted by the design as described later. There was a problem that was large. It can be easily imagined when the swing member has two lateral swing rollers. That is,
Since a plurality of intermediate gears are required, it is not possible to provide a space for the intermediate gears in the swing member while avoiding interference with other roller shafts such as an intermediate rubber roller. Further, if this is forcedly implemented, the structure becomes complicated and the number of parts increases.

Therefore, although not specifically described in the specification,
In the embodied known example, only the lateral swing roller located outside is rotationally driven. In this case, the swing roller located in the middle is a throwing type which freely floats. The intermediate gear is fixed to the frame side so that it does not affect the meshing even when the lateral swing roller moves due to the swing of the swing member, that is, between the centers of the two horizontally driven swing rollers. The center is located on the straight line. Although details are omitted, the configuration is such that interference with the swing roller shaft located in the middle is avoided.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the drive system of at least three swaying rollers that rotate a large-diameter inking roller so that the large-diameter inking roller slips and causes a rotation delay. Another object of the present invention is to provide an inking device which prevents the horizontal swing roller from floating at a high speed while preventing it from being raised.

[0011]

[Means for Solving the Problems] The present invention has the following constitution in order to achieve the above object. That is, a plate drive drum gear fixed to the end of the plate cylinder and having a diameter equal to that of the plate cylinder, a first intermediate gear that interlocks with this, and a lateral swing that is supported by a fixed bearing of the frame and meshes with the first intermediate gear. A frame-supporting lateral swing roller provided with a roller gear; a swinging member having one end fitted to the outer periphery of the fixed bearing whose end projects from the inside of the frame and the other end connected to a roller lifting device; A plurality of oscillating rollers supporting the oscillating member, which are supported by fixed bearings attached to the oscillating member and in which the oscillating roller gears protrude from the window of the frame to the outside of the frame; A large-diameter inking roller supported by a bearing bracket, and a frame side of the rocking member, which is attached concentrically with the axis of the large-diameter inking roller and protrudes outside the frame from a window hole of the frame. And Ya support pin, the configuration of the inking device consisting of a second intermediate gear meshing simultaneously with each the distributor roller in the same diameter as the large diameter ink form roller while being supported by the support pin.

[0012]

According to the present invention, since the second intermediate gear is attached to the swing member, the lateral swing roller supported by the bearing fixed to the swing member and the second intermediate gear when the position of the swing member changes. The relational position with does not change. Since the lateral swing roller gear is arranged in a planetary pattern with respect to the second intermediate gear, only one second intermediate gear is required, and as a matter of course, the center distance between the gears is constant in the palm. In addition, if necessary, there is a space on the side of the large-diameter inking roller that can be added to the roller, and the same intermediate gear can easily provide rotational drive to the roller added here, It is easy to add lateral swing rollers, and the degree of freedom in designing the roller arrangement increases.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a side view of the inking device according to the present invention from the outside of the frame, FIG. 2 is a partial cross-sectional development view taken along the line II-II in FIG. III- in FIG.
FIG. 4 is a partial cross-sectional development view taken along the line III and is viewed in plan from the inside of the frame. FIG. 4 is a schematic side view from the inside of the frame mainly for explaining the adjustment bearing bracket.

In FIG. 1, 1 is a frame, 2 is an inking device, 3, 4 and 5 are horizontal swing rollers, 6 is a plate cylinder, and 7 is a large-diameter inking roller. The plate cylinder shaft end 8 is fixed to a platen cylinder 5 with a gear-forming device driving gear 9 having the same diameter as the plate cylinder 5, and a first intermediate gear 10 is provided between the platen cylinder 5 and a horizontal roller roller gear 12 fixed to the horizontal roller 3. It is attached to the frame 1 by the pin 10a, and these are interlocked. The lateral swing roller 3 is supported by the fixed bearing 11 of the frame 1 (see FIGS. 2 and 3). The reciprocating mechanism for the lateral swing rollers 3, 4, 5 is provided on the side of a frame (not shown) corresponding to the frame 1, but this is omitted because it is not related to the gist of the present invention.

The fixed bearing 11 has a projecting portion for supporting the swinging member 15 inside the frame 1, and a hole provided at an end portion of the swinging member 15 is fitted and attached to the outer periphery 13 thereof. I am doing it. Reference numeral 15a denotes a slip-out preventing member. A member 14 having, for example, an adjusting screw mechanism is attached to the other end of the swinging member 15 so as to be connected to a roller lifting device (not shown) (FIGS. 1 and 4). Therefore, the oscillating member 15 can oscillate about the axis a of the oscillating roller 3 by the operation of the roller lifting device.

The swing member 15 has a fixed bearing 16a,
16b is attached to this, and other oscillating rollers 4, 5
Have each supported. The frame 1 is provided with a window hole 17 shown in FIG. 1, through which the attached gears 18 and 19 of the oscillating rollers 4 and 5 project to the outside of the frame 1 (FIG. 3). ). Further, this swing member 1
An adjusting bearing bracket 20 is attached to the inside of the No. 5 to support the large-diameter inking roller 7 (FIG. 4). A gear support pin 22 is mounted on the frame side of the swing member 15, that is, on the opposite side of the adjustment bearing bracket 20 from which it is mounted. The gear support pin 22 projects through the window hole 17 of the frame 1 to the outside of the frame 1. I am supposed to do it. A second intermediate gear 23 having the same diameter as that of the large-diameter inking roller 7 is fitted to the tip of the pin 22, and this is attached to each of the lateral swing rollers 3, 4, and 5 of the attached gear 1.
The rollers are arranged so as to be meshed with 2, 18, and 19 at the same time. In other words, the oscillating rollers 3, 4, 5 are arranged in a satellite shape centering on the second intermediate gear 23.

Next, the support structure of the large-diameter inking roller 7 will be described with reference to FIG. A bracket support pin 24 is erected inside the swinging member 15, and an adjusting bearing bracket 20 is tightened and fixed to this via an eccentric bush 25 by a nut (not shown). Reference numeral 26 is an adjustment bolt support pin provided on the swing member 15. The circular recess 27 of the adjustment bearing bracket 20 is a fitting portion of the bearing 28 at the shaft end of the large diameter ink forming roller 7. FIG.
Since the adjusting mechanism such as the eccentric bushing, which is shown in FIG.

The present invention is constituted as described above, and the rotation of the plate cylinder drives the gear train of the inking device driving gear 9, the first intermediate gear 10, the lateral swing roller gear 12, and the second intermediate gear 23,
Further, the auxiliary gears 18 and 19 of the lateral swing rollers 4 and 5, which mesh with the second intermediate gear 23, are simultaneously driven. All of the three lateral swing rollers 3, 4, 5 seen in the embodiment are forcibly driven in this way, and the large-diameter inking roller 7 is used.
Since all of the lateral swing rollers contacting with can be made to have a bearing structure that does not lift even at high speed rotation, it is possible to prevent the large-diameter inking roller from slipping due to friction.

Also in the above-mentioned known example, the intermediate rubber rollers 29a and 29b, the ink leveling roller 30 and the like as shown by the dotted line in FIG.
1 (FIG. 4) and its weight acts on the oscillating roller as in the present invention, so that the slip phenomenon was suppressed considerably. However, in recent years, an increase in printing speed and a severe demand for product finish have prompted further improvement of the inking device. According to the configuration of the present invention, the risk of background stains on the printed matter due to the slip phenomenon is eliminated, and the adverse effects of dampening water can be eliminated as follows.

It goes without saying that dampening water is indispensable for an offset printing machine. However, in order to obtain a product with so-called smoothness without causing streaks, ghosts, ink emulsification, etc., in addition to supplying ink evenly to the plate surface, the supply of dampening water to the minimum required It is essential to hold down. In the case of using a large number of inking rollers, the effect of water must not be reduced to the roller that comes into final contact with the plate when viewed from the direction of rotation of the plate, so excessive water is supplied to the first contact roller. It was unavoidable. According to the configuration of the present invention, the ink roller that comes into contact with the plate surface is one large-diameter inking roller, which is extremely advantageous in this respect. If necessary, it also has an advantage that a water leveling roller 21 can be provided laterally. Further, since there is a space in the inner portion of the frame 1 in which the first intermediate gear 10 is arranged, a water leveling roller (not shown) that comes into contact with the plate surface may be provided in that portion. Of course, these rollers are also effective for ink leveling.

In the roller group shown by the chain double-dashed line in FIG. 1, 32 is an ink fountain roller, 33 is an ink transfer roller, 34 is a rider roller, 35, 36 and 37 are intermediate rubber rollers, 38 is an ink leveling roller, 39 is a lateral swing roller.

[0022]

As described above, according to the present invention,
In the inking device using the large-diameter inking roller, the drive system from the plate cylinder to the oscillating roller is configured as described above, so that the forced rotation drive of three or more oscillating rollers is simplified. It can be done on the basis.
As a result, a single large-diameter inking roller can exert the effect of inking that is superior to the conventional apparatus and the effect of wiping the negative side with dampening water. In addition, inking with a large-diameter inking roller is because the start of contact with the plate cylinder is smooth and there is no shock, and the large curvature causes the ink to come off from the plate contact slowly and ink does not stand up. hand,
The improvement of the lateral swing roller drive system further promotes the effect.
Further, since it has a space-saving structure which is not bulky as compared with the conventional apparatus, it has an effect that a working space can be widened when used in a tandem type multicolor printing machine.

[Brief description of drawings]

FIG. 1 is a side view of an inking device according to the present invention from the outer side of a frame.

FIG. 2 is a partial cross-sectional development view taken along the line II-II in FIG. 1, viewed from the outside of the frame in a plan view.

FIG. 3 is a partial cross-sectional development view taken along the line III-III in FIG. 1, viewed from the inside of the frame in plan view.

FIG. 4 is a schematic side view from the inside of the frame.

[Explanation of symbols]

1 ... frame, 3,4,5 ... swing roller,
6 ... plate cylinder, 7 ... large-diameter inking roller,
9 ... Gear for driving inking device, 10 ... First intermediate gear, 11 ... Fixed bearing, 12, 18, 19 ...
..Swaying roller gears, 15 ... Oscillating members, 16
a, 16b ... Fixed bearing of rocking member, 17 ... Window hole, 23 ... Second intermediate gear

Claims (2)

[Claims] 1. An inking device of a printing machine having a large-diameter inking roller which rotates in contact with a plurality of lateral swing rollers and a plate cylinder, and has a same diameter as the plate cylinder fixed to the end of the plate cylinder shaft. A flesh device driving gear, a first intermediate gear that works together with the flesh device, a lateral swing roller supported by a fixed bearing of the frame, and a lateral swing roller gear that meshes with the first intermediate gear, and an end inside the frame. A swinging member, one end of which is fitted to the outer circumference of the fixed bearing with the protruding portion, and the other end of which is connected to a roller lifting device, and a swinging member supported by a fixed bearing provided with the swinging member and through a window hole of the frame. A plurality of oscillating rollers supporting the oscillating member in which the oscillating roller gears protrude to the outside of the frame, a large-diameter inking roller supported by an adjusting bearing bracket attached inside the oscillating member, and the oscillating member. A gear support pin that is attached to the frame side concentrically with the axis of the large-diameter inking roller and projects from the window hole of the frame to the outside of the frame, and is supported by the support pin and has the same diameter as the large-diameter inking roller. Each lateral swing roller is forcibly rotated based on the above-mentioned configuration, which comprises a second intermediate gear that meshes with each lateral swing roller at the same time, and the center distance between the gears is always constant with respect to the position variation of the swinging member. An inking device for a printing press, characterized in that the large-diameter inking roller is configured to rotate together therewith. 2. An inking roller for inking the plate cylinder is only one large-diameter inking roller, and at least one water leveling roller or a swaying roller is in contact with the side of the ink roller. The inking device according to claim 1.