JP4359380B2 - Ink device for rotary printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inking device for a rotary printing press.
[0002]
[Prior art]
For example, in a double-sided multicolor offset printing machine, four plate cylinders each contact a pair of rubber cylinders, and an ink device is provided on each of these plate cylinders via a group of rollers. In this inking device, the calling roller swings (reciprocates) between the ink fountain roller for storing ink and the uppermost kneading roller of the roller group, whereby the ink in the ink fountain is transferred from the fountain roller to the above-mentioned ink roller. It can be transferred to a group of rollers.
[0003]
In particular, in an ink apparatus that performs rainbow printing, a collecting roller is in contact with the most upstream roller of a roller group, and two sets of ink fountains, fountain rollers, and calling rollers are disposed on the collecting roller. By storing inks of different colors in each of them, it is possible to perform rainbow printing by gradation of these inks on the collecting roller.
[0004]
[Problems to be solved by the invention]
In the conventional inking device that performs rainbow printing on the double-sided multicolor offset printing machine as described above, the calling roller is arranged radially with respect to the collecting roller. The attaching / detaching direction differs depending on the calling roller, and the attaching / detaching work is very troublesome. In particular, it has been a great effort to dispose a heavy load calling roller up to a predetermined position near the collecting roller while handling it.
[0005]
Such problems are not limited to inking devices that perform rainbow printing on double-sided multicolor offset printing machines, but are also described above for inking devices of rotary printing presses, including other inking devices on double-sided multicolor offset printing machines. It can happen in the same way as the case.
[0006]
In view of the above, an object of the present invention is to provide an inking device for a rotary printing press that can easily perform operations related to maintenance and inspection.
[0007]
[Means for Solving the Problems]
An inking device of a rotary printing press according to the present invention for solving the above-described problems is provided in an ink fountain that stores ink by a bottom plate and a weir and the ink fountain, and the gap between the ink fountain and the bottom plate of the ink fountain In an inking device of a rotary printing press comprising: a reed roller for drawing out ink; and a call roller that is detachably supported by a support member adjacent to the reed roller and receives the ink from the reed roller. The calling roller is provided with a rolling portion so as to roll along the upper end surface of the weir of the ink fountain so as to be transferred to the support member.
[0008]
In the above-described inking device of a rotary printing press, there is provided a defining means for defining the rolling direction of the calling roller.
[0009]
In the above-described inking device of a rotary printing press, the support member opens upward so as to support the calling roller, and a receiving portion whose inner surface side of the end portion on the side of the heel roller is chamfered; A holding portion that holds the calling roller against the receiving portion, and an interval between the rolling portion of the calling roller and an outer peripheral surface of the calling roller is an upper end surface of the weir of the ink fountain. It is characterized in that it has substantially the same size as the interval with the outer peripheral surface of the heel roller.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment in which an inking device of a rotary printing press according to the present invention is applied to an inking device that performs rainbow printing of a double-sided multicolor offset printing press will be described with reference to FIGS. 1 is an overall schematic structural diagram of a double-sided multicolor offset printing machine, FIG. 2 is a side view showing a schematic configuration of the inking device, FIG. 3 is a plan development view of the main part of the inking device, and FIG. FIG. 5 is an operation explanatory diagram of the inking device.
[0011]
As shown in FIG. 1, the paper supply unit 10 is provided with a paper supply table 11. The paper feeding unit 10 is provided with a feeder board 12 that feeds the sheet 100 that is a sheet-like material on the paper feeding tray 11 to the printing unit 20 one by one. A swing device 13 is provided at the front end of the feeder board 12 to transfer the sheet 100 to the transfer cylinder 21 a of the printing unit 20.
[0012]
The transfer cylinder 21a is in contact with a rubber cylinder 22a having a gripper device (not shown) via transfer cylinders 21b to 21d. The rubber cylinder 22b is in contact with the rubber cylinder 22a on the downstream side of the transfer cylinder 21d. On the upstream side of the transfer cylinder 21d of the rubber cylinder 22a, a plurality of (four in the present embodiment) plate cylinders 23a are in contact with each other at a predetermined interval along the circumferential direction of the rubber cylinder 22a. . A plurality of (four in this embodiment) plate cylinders 23b are in contact with each other at a predetermined interval along the circumferential direction of the rubber cylinder 22b on the upstream side of the rubber cylinder 22a. . A transfer cylinder 21e is in contact with the rubber cylinder 22a on the downstream side of the rubber cylinder 22b.
[0013]
The paper discharge drum 31 of the paper discharge unit 30 is in contact with the transfer drum 21e. A sprocket 32 is coaxially provided on the discharge cylinder 31. The paper discharge unit 30 is provided with a sprocket 33. A paper discharge chain 34 is stretched between the sprockets 32 and 33. The paper discharge chain 34 is provided with a plurality of paper discharge claws (not shown) at predetermined intervals. The paper discharge unit 30 is provided with paper discharge trays 35a and 35b on which printed sheets 100 are stacked.
[0014]
A roller group 24 as shown in FIG. 2 is in contact with the plate cylinders 23a and 23b. As shown in FIG. 2, a collective roller 25 is in contact with the upstream side of the roller group 24 that is in contact with the plate cylinders 23a and 23b that perform rainbow printing. A first intermediate roller 26 a is in contact with the collecting roller 25. The second intermediate roller 26b is in contact with the first intermediate roller 26a.
[0015]
On the other hand, as shown in FIG. 2, an ink fountain 27 for storing ink by a bottom plate 27a and a weir 27b is disposed in the vicinity of the collecting roller 25 and in the vicinity of the second intermediate roller 26b, respectively. Each of these ink fountains 27 is provided with a fountain roller 28 that draws the ink in the ink fountain 27 from the gap with the bottom plate 27a. A calling roller 29 is disposed between the reed roller 28 located near the collective roller 25 and the collective roller 25 and between the reed roller 28 located near the second intermediate roller 26b and the second intermediate roller 26b. Each is arranged.
[0016]
That is, by bringing one (lower) calling roller 29 into contact with the collecting roller 25 via the intermediate rollers 26a and 26b, the work space between the one (lower) and the other (upper) calling roller 29 is reduced. This makes it possible to orient both the calling rollers 29 toward substantially the same radial direction of the collecting roller 25.
[0017]
The call roller 29 is supported as shown in FIGS. 2 to 4, and the support structure will be described below.
[0018]
As shown in FIGS. 2 to 4, the base ends of the support arms 292 are connected and supported at both ends of the support shaft 291 that is rotatably supported by the frame 1. At the tips of these support arms 292, annular support holders 293, which are support members for supporting the call roller 29, are attached via bearings 294 attached to the shaft end of the call roller 29, respectively. The support holder 293 can be divided into two in the radial direction. The support holder 293 is supported by the support arm 292 and opens upward to support the calling roller 29. The semicircular receiving portion 293a whose inner peripheral surface is chamfered, and the end portion (the other end) on the side of the collecting roller 25 or the second intermediate roller 29 side of the receiving portion 293a are rotated. A semi-circular presser portion 293b that is movably pin-coupled to hold the calling roller with respect to the receiving portion 293a, and a connector 293c that detachably connects one end of the receiving portion 293a and one end of the presser portion 293b. It is prepared.
[0019]
That is, the calling roller 29 is detachably supported with respect to the support holder 293 by operating the coupler 293c of the support holder 293 to open and close the presser 293b, and the support shaft 291 is driven by a driving means (not shown). By reciprocatingly rotating in the circumferential direction at a predetermined cycle, it is possible to swing (reciprocate) between the roller 28 and the collecting roller 25 or the second intermediate roller 26b via the support arm 292. -ing
[0020]
Further, as shown in FIG. 3, guide grooves 29a each having a size slightly larger than the width of the upper end surface of the weir 27b of the ink fountain 27 are formed on both ends of the calling roller 29 along the circumferential direction. The guide groove 29a has a pair of gap widths that are substantially the same size as the opposed gap width of the weir 27b of the ink fountain 27, and, as shown in FIG. The distance S1 from the outer peripheral surface of the ink fountain 27 is substantially the same as the distance S2 between the upper end surface of the weir 27b of the ink fountain 27 and the outer peripheral surface of the heel roller 28. In the present embodiment, the rolling portion is constituted by the bottom surface 29aa of the guide groove 29a, and the defining means is constituted by the side surface 29ab of the guide groove 29a.
[0021]
In such a double-sided multicolor offset printing machine, when the sheet 100 is delivered from the paper stack 11 of the paper feeding unit 10 to the transfer cylinder 21a via the feeder board 12 and the swing device 13, the sheet 100 is unloaded. The rubber cylinder 22a of the printing unit 20 is transferred to the gripper claw device via the transfer cylinders 21b to 21d, held by the rubber cylinder 22a, and passes between the rubber cylinders 22a and 22b.
[0022]
At this time, ink is supplied from each ink device to the plates of the plate cylinders 23a and 23b, and ink corresponding to the pattern of the plate of the plate cylinder 23a is supplied to the outer peripheral surface of the rubber cylinder 22a. Since ink corresponding to the pattern of the plate is supplied to the outer peripheral surface of the rubber cylinder 22b, the pattern of the rubber cylinder 22a is changed to that of the sheet 100 as the sheet 100 passes between the rubber cylinders 22a and 22b. The image on the one side is transferred, the pattern on the rubber cylinder 22b is transferred to the other side of the sheet 100, and multicolor printing is performed on both sides of the sheet 100.
[0023]
Here, for example, in an inking device that performs rainbow printing, the ink drawn from the two ink fountains 27 by the respective fountain rollers 28 is transferred to the collecting roller 25 or the second intermediate roller 26b by the above-described swinging of the respective call rollers 29. The inks respectively supplied and supplied to the second intermediate roller 26b are supplied to the collecting roller 25 through the first intermediate roller 26a, whereby each ink is gradation on the collecting roller 25, and the roller group 24 is Are supplied to the plate cylinders 23a and 23b through which rainbow printing is performed.
[0024]
Subsequently, the double-sided multi-color printed sheet 100 is transferred to the paper discharge drum 31 through the transfer drum 21e and is replaced by the paper discharge claws of the paper discharge chain 33, and then the paper discharge trays 35a and 35b. To be discharged.
[0025]
In this way, when the double-sided multicolor printing is finished and the calling roller 29 of the inking device that performs rainbow printing is removed by maintenance inspection or the like, by opening the presser portion 293b by operating the connecting tool 293c of the support holder 293, Both the upper and lower calling rollers 29 can be drawn from the upper side of each ink fountain 27.
[0026]
For this reason, the call roller 29 can be easily detached from the support holder 293.
[0027]
On the other hand, when the calling roller 29 that has undergone maintenance and inspection is attached to the inking device, the guide groove 29a of the calling roller 29 is aligned with the upper end surface of the weir 27b of the ink fountain 27 as shown in FIG. After the call roller 29 is placed on the weir 27b of the ink fountain 27, the call roller 29 is rolled on the weir 27b of the ink fountain 27 so as to move the call roller 29 toward the support holder 293. The roller 29 rolls along the weir 27b of the ink fountain 27, can be transferred from the weir 27b to the receiving portion 293a of the support holder 293, and the support 293c is closed by operating the coupling tool 293c. The calling roller 29 can be rotatably supported by the holder 293 via a bearing 294.
[0028]
For this reason, attachment of the calling roller 29 to the support holder 293 can be easily performed.
[0029]
Therefore, according to such an inking device, all the calling rollers 29 can be attached and detached from the same direction, and the heavy weight calling roller 29 can be transferred to the support holder 293 without being handled. The operation of attaching and detaching the roller 29 can be easily performed, and the work for maintenance and inspection can be facilitated.
[0030]
Further, when the calling roller 29 rolls on the weir 27b of the ink fountain 27, the calling roller 29 so that the side surface 29ab of the guide groove 29a of the calling roller 29 rolls reliably along the upper end surface of the weir 27b. Therefore, the calling roller 29 can be reliably delivered to the support holder 293.
[0031]
Further, the distance S1 between the bottom surface 29aa of the guide groove 29a of the calling roller 29 and the outer peripheral surface of the calling roller 29, and the distance S2 between the upper end surface of the weir 27b of the ink fountain 27 and the outer peripheral surface of the fountain roller 28 are approximately. Since they have the same size, the calling roller 29 is transferred to the support holder 293 while rolling on the reed roller 28 without colliding with the reed roller 28 or dropping on the reed roller 28. Thus, damage to the reed roller 28 and the calling roller 29 can be prevented, and the calling roller 28 can be reliably transferred to the support holder 293.
[0032]
Further, since the inner peripheral surface side of the end portion of the receiving portion 293a of the support holder 293 on the side of the reed roller 28 is chamfered, the calling roller 29 that has rolled on the weir 27b of the ink fountain 27 is moved to the receiving portion of the support holder 293. 293a can be prevented from colliding with each other, damage to the receiving portion 293a of the calling roller 29 and the support holder 293 can be prevented, and the calling roller 29 can be reliably delivered to the support holder 293. .
[0033]
In this embodiment, concave guide grooves 29a are provided on both ends of the calling roller 29. For example, as shown in FIG. 6A, the axial direction of the outer peripheral surface 29ba serving as a rolling portion is provided. Wheels 29b having a regulation flange 29bb serving as regulation means on the inside are provided on both ends of the calling roller 29, or as shown in FIG. 6 (b), the regulation is made in pairs so as to sandwich the weir 27b of the ink fountain 27. A defining ring 29c as a means is provided on both ends of the calling roller 29 to form a rolling part 29ca between the opposing side faces 29cb of the ring 29c, or a rolling part as shown in FIG. Wheels 29d having concave guide grooves formed so as to have a bottom surface 29da and a side surface 29db serving as defining means are provided on both ends of the calling roller 29, as shown in FIG. 6 (d). It is also possible to a defined plate 29e as a defining means which pairs to sandwich the ductor roller 29 from both end side is supported in various frame or the like and directly rolling portion 29ea the axial end of the ductor roller 29.
[0034]
In the present embodiment, the intermediate rollers 26a and 26b are disposed between the lower calling roller 29 and the collecting roller 25. However, the upper calling roller 29 and the collecting roller 25 may be arranged for convenience of design. The intermediate rollers 26a and 26b may be disposed between them, or one or more intermediate rollers may be disposed.
[0035]
Further, in the present embodiment, the case where the double-sided multi-color offset printing press is applied to an inking device that performs rainbow printing has been described. If it is an inking device of a rotary printing press, it can be applied in the same manner as in the present embodiment.
[0036]
【The invention's effect】
According to the inking device of the rotary printing press of the present invention, the calling roller is provided with the rolling portion so that the calling roller can roll along the upper end surface of the ink fountain weir and can be delivered to the support member. Can be easily transferred to the support member, and work for maintenance and inspection can be easily performed.
[Brief description of the drawings]
FIG. 1 is an overall schematic structural diagram of an embodiment of a double-sided multicolor offset printing machine to which an inking device of a rotary printing machine according to the present invention is applied.
2 is a side view showing a schematic configuration of an inking device that performs rainbow printing of the double-sided multicolor offset printing press of FIG. 1; FIG.
FIG. 3 is a plan development view of a main part of the inking device of FIG. 2;
4 is an extracted enlarged view of a calling roller portion of the inking device of FIG. 2. FIG.
FIG. 5 is an operation explanatory diagram of the inking device of FIG. 2;
FIG. 6 is an explanatory view of another example of the inking device of the rotary printing press according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 10 Paper feed part 11 Paper feed stand 12 Feeder board 13 Swing apparatus 20 Printing part 21a-21e Transfer cylinder 22a, 22b Rubber cylinder 23a, 23b Plate cylinder 24 Roller group 25 Collecting roller 26a First intermediate roller 26b Second intermediate roller 27 Inkwell 27a Bottom plate 27b Weir 28 Roller roller 29 Calling roller 29a Guide groove 29aa Bottom surface 29ab Side surface 29b Wheel 29ba Outer peripheral surface 29bb Regulating flange 29c Regulating ring 29ca Rolling part 29cb Opposing side surface 29d Wheel 29da Bottom surface 29db Side surface 29e Regulating plate 29ea Rolling Portion 291 Support shaft 292 Support arm 293 Support holder 293a Receiving portion 293b Presser 293c Connecting tool 294 Bearing 30 Paper discharge portion 31 Paper discharge barrel 32, 33 Sprocket 34 Paper discharge chain 35a, 35b Paper discharge tray 100 Sheet paper

Claims (3)

An ink fountain for storing ink by a bottom plate and a weir;
A fountain roller that is provided in the ink fountain and draws out the ink from a gap between the ink fountain and the bottom plate;
In an ink apparatus of a rotary printing press, which is detachably supported by a support member so as to be adjacent to the reed roller, and includes a calling roller that receives the ink from the reed roller,
An inking device for a rotary printing press, wherein a rolling portion is provided on the calling roller so that the calling roller can roll along the upper end surface of the weir of the ink fountain and be delivered to the support member. In claim 1,
An inking device for a rotary printing press, comprising a defining means for defining a rolling direction of the calling roller. In claim 1,
The support member is
A receiving portion that opens upward to support the calling roller, and is chamfered on the inner surface side of the end portion on the heel roller side;
A pressing portion that holds the calling roller with respect to the receiving portion, and
The interval between the rolling portion of the calling roller and the outer peripheral surface of the calling roller is substantially the same as the interval between the upper end surface of the weir of the ink fountain and the outer peripheral surface of the fountain roller. Ink device for rotary printing press.

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