JPH0675961B2 - Rolling roller device for exchange cylinder type rotary printing press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fixing roller device in an exchange cylinder type rotary printing press.

[Conventional technology]

A rotary printing press that performs high-quality printing is equipped with a plate twisting device in order to improve register accuracy. This is a device that corrects the mounting of the plate on the plate cylinder when the patterns of each color are misaligned due to the effects of plate making accuracy, plate bending accuracy, etc. The machine employs a method in which one shaft center of the bearing portion that supports both ends of the plate cylinder is displaced.

[Problems to be Solved by the Invention]

In such a case, the attachment roller, which has been in uniform contact with the plate surface until now, has one side strongly contacted with or separated from the plate cylinder due to the addition of a fin. Normally, 2 to 4 contact rollers are in contact with one plate cylinder. However, the amount of change in contact with each contact roller depends on the position of the center of the plate cylinder and the position of the contact roller on the plate cylinder. It will change.

When the plate cylinder is a fixed cylinder type, the position where the dressing roller is attached is always the same, so a stopper with the same diameter as the plate cylinder is attached to the part that is integral with the plate cylinder, and the screw rod is taken out from the dressing roller. It contacts the stopper and the contact pressure between the plate and the roller is adjusted with a screw rod.

As a result, even when the plate cylinder is twisted, the stopper moves in the same manner as the plate cylinder, so that the contact roller also follows the stopper, and the contact pressure between the plate and the contact roller can be kept constant.

On the other hand, in the exchange cylinder type rotary press, the size and position of the plate differ depending on the size.Therefore, when the plate cylinder is exchanged, the position of the receiving roller and the angle of the receiving roller lever are different, which is similar to the fixed cylinder type. Even if you follow Hineri with an exchangeable body,
The adjustment for each size had to be performed, the configuration for that was complicated, and its operation was extremely troublesome.

The present invention has been conceived in view of the above, and even in each plate cylinder in a different exchange cylinder unit, the follow-up operation of the receiving roller with respect to the edge of each plate cylinder can be automatically performed, and the device is a cam It can be obtained with a simple structure of a stopper, and further, it is possible to easily perform the initial adjustment of the contact pressure of the deposition roller with respect to the plate cylinder when the replacement cylinder unit is replaced. It is an object to provide a roller device.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a roller attachment device in a rotary cylinder type rotary printing press according to the present invention is configured such that the body replacement member unit is replaceably mounted on the main body side including the roller attachment device and the like. Each exchange cylinder unit 1 is supported by supporting both ends of the attachment rollers 10 and 10a of the apparatus by rotating levers 16, 17, 16a and 17a.
Of the plate cylinder 2 of the exchange cylinder unit 1 and one of the bearing devices 5 of the bearing devices 5 and 6 for supporting both ends of the plate cylinder 2 so as to be eccentrically rotatable. In the rotary roller device of the rotary printing press of the present invention, the stoppers 20 provided on the rotary levers 16, 17, 16a, 17a for supporting both ends of the rotary rollers 10, 10a on the both bearing devices 5, 6 of the exchange cylinder unit 1. Arc-shaped cams 18a, 18b, 19a, 19b with which 21,21,22,23 abut
Is fixed to each of the bearing devices 5 and 6 so that the position thereof can be adjusted in the rotational direction, and at least the one of the cams 18a and 19a of the cams 18a and 19a that is fixed to the eccentrically rotatable bearing device 5 side.
The outer peripheral shape which abuts against 0 and 22 is configured so that the distance from the center of rotation of the outer peripheral surface to the peripheral surface gradually increases in the circumferential direction.

[Work]

By eccentrically rotating one bearing device of the bearing device that supports both ends of the plate cylinder, a twist is added to the plate cylinder, and the contact roller that is in contact with the plate cylinder moves following this and the contact pressure is increased. Touch the plate cylinder without change. The contact pressure is adjusted by moving the cams 18a and 19a in the rotation direction.

When the replacement cylinder unit is replaced with respect to the main body side, the cam is rotated with respect to the bearing device to perform the initial adjustment.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is an exchange cylinder unit, and 2 is its plate cylinder.
The plate cylinder 2 is supported on the frame 3 and the rear frame 4 of the exchange cylinder unit 1 via bearing devices 5 and 6, respectively. One of the two bearing devices 5 and 6, for example, the front bearing device 5 is rotatably supported on the front frame 3. The front frame 3 of the bearing device 5
The rotation center 0 ₁ with respect to is eccentric by ε with respect to the bearing center 0 ₂ (plate cylinder center) of this bearing device, and when this bearing device 5 rotates about the above-mentioned rotation center 0 ₁ , the bearing center 0 1 ₂ moves in an arc around the rotation center 0 ₁ .

The case of the bearing device 5 that rotates relative to this frame
One end of a lever 7 is rotatably connected to a radial position of 5a, and a screw rod 8 is connected to the lever 7. The threaded rod 8 is screwed into a nut 9 supported on the front frame 3 side. When the nut 9 is rotated, the threaded rod 8 moves relatively to move the lever 5 to the front side of the bearing device 5. The frame 3 is rotated about the rotation center 0 ₁ .

Reference numerals 10 and 10a denote a plurality of, for example, first and second receiving rollers which rollly contact the plate cylinder 2, and 11 denotes rocking rollers which rollly contact both the loading rollers 10 and 10a. The rocking roller 11 is supported by front and rear frames 12 and 13 on the main body side via bearing devices 14 and 15 so as to rock in the axial direction. Also, each wearing roller 10,
Both ends of 10a are bearing devices 1 that support the rocking roller 11 described above.
The rotation levers 16, 17, 16a, 17a are rotatably supported by the cases of 4, 15 coaxially therewith, and are supported by the tips of the rotation levers 16, 17, 16a, 17a. And the rotary levers 16, 17, 16a, 17a of the respective wearing rollers 10, 10a
Is urged toward the plate cylinder 2 by a cylinder device or the like.

Of the cases 5a, 6a of the front and rear bearing devices 5, 6 supporting the plate cylinder 2, the center of the case 5a of the front bearing device 5 is the center of rotation 0 ₁ which is eccentric with respect to the bearing center 0 ₂ thereof. Is concentric with.

Then, the double-sided roller 1 is attached to the cases 5a, 6a of the double-sided bearing devices 5,6.
The number of cams corresponding to 0, 10a, that is, the first receiving roller 1
The front and rear first cams 18a and 18b, which come into contact with the stoppers 20 and 21 fixed to the front and rear rotation levers 16 and 17, and the second mounting roller 10a.
The second cams 19a, 19b before and after contacting the stoppers 22, 23 fixed to the front and rear turning levers 16a, 17a are fixed, and the respective cams 18a, 18b, 19a, 19b and the respective stoppers 20, 21, Due to the contact of 22,23, the respective deposition rollers 10,10a are pressed against the plate cylinder 2 with an appropriate contact pressure.

The first and second cams 18a, 18b, 19a, 19b are the bearing devices 5, 6 respectively.
The positions of the cases 5a and 6a can be adjusted in the rotational direction.

That is, each cam 18a, 18b, 19a, 19b is provided with an elongated hole 25 in the circumferential direction as shown in FIG. 2, and a bolt 24 is inserted into this elongated hole 25 to insert the bolt 24 into each bearing device 5, Each cam 18a, 18b, 19a, 19b by screwing into the bolt hole provided in 6 and tightening
Are fixed in the rotating direction. By slightly loosening the bolt 24, the phase shift of each cam can be changed in the rotational direction by the length of each slot 25.

Of the cams 18a, 18b, 19a, 19b, at least the front side first and second cams 18 fixed to the rotating bearing device 5 are rotated.
The outer peripheral shape of each of a and 19a is the center of rotation of the shaft center device 5.
_The shape is such that the distance from ₁ to the peripheral surface gradually increases with a slight change (lift amount) in the circumferential direction.

The lift amount of the outer peripheral shapes of both the cams 18a, 19a is small as described above, and the front bearing device 5 is not supported by the front frame 3
When rotated with respect to, the stoppers 20 and 22 are driven by the eccentric amount of the bearing center (rotation center of the plate cylinder) 0 ₂ at this time, so that the contact pressure between each of the deposition rollers 10 and 10a and the plate cylinder 2 is increased. The shape is such that the stoppers 20 and 22 are in contact with each other so that the mutual contact amount (nip width) hardly changes.

That is, when the front bearing device 5 is rotated with respect to the front frame 3, the bearing center 0 ₂ is eccentric, and for example, the plate cylinder 2 is twisted to one of the receiving rollers 10 side.
The distance from the center 0 ₂ of the roller to the shaft center of the receiving roller 10 is hardly changed.

The rotation angle of the bearing device 5 in the above-described twisting operation is 6 to
The angle is as small as 9 °, so that the change in the circumferential direction of the contact portion with respect to the cams 18a and 19a stoppers 20 and 22 at this time is only slight.

In the above structure, the nut 9 is rotated to move the screw rod 8 in the axial direction, whereby the front bearing device 5 is rotated about the rotation center 0 ₁ with respect to the front frame 3 via the lever 7. . As a result, the shaft center 0 _{2 on} the front side of the plate cylinder ₂ becomes
An amount of eccentricity ε of the front bearing device 5 and an amount corresponding to the amount of rotation of the front bearing device 5 are eccentric to add eccentricity to the plate cylinder 2.

At this time, since the front cams 18a and 19a also rotate integrally with the front bearing device 5, the contact points between the cams 18a and 19a and the stoppers 20 and 22 of the receiving roller 10 move, and the cams 18a and 19a. The front side shaft center of the receiving rollers 10 and 10a changes according to the lift amount with respect to the rotation amount of. As a result, a twist that follows the amount of swell of the plate cylinder 2 is added to the wearing rollers 10 and 10a,
The plate cylinder 2 after the twist adjustment is brought into contact with the plate cylinder 2 with substantially the same contact pressure as before the twist, and the contact amount (nip width) becomes substantially the same.

On the other hand, the adjustment of the contact pressure between the receiving rollers 10 and 10a and the plate cylinder 2 is
This is done by loosening the bolts 24 fixing the cams 18a, 19a, 19b, 19b and moving the cams relative to the bearing device 5 in the rotational direction.

That is, by rotating the cams 18a, 19a, 18a, 19b with respect to the bearing device 5, the stoppers 2 for the cams 18a, 19a, 18b, 19b are rotated.
The contact surface with 0,22,21,23 changes in the outer peripheral direction, and this position changes in the radial direction with respect to the bearing center (center of the plate cylinder) 0 ₂ .
Therefore, the distance between the axes of the plate cylinder 2 and the receiving rollers 10 and 10a is changed to adjust the contact pressure between them, whereby the contact amount (nip width) between the plate surface and the receiving rollers 10 and 10a is adjusted. After the adjustment, tighten the bolt 24 again to fix each cam.

As the cams 18a, 18b, 19a, 19b, dedicated ones are used for each plate cylinder 2 in each exchange cylinder unit 1 and are replaced when the plate cylinder 2 is replaced. And when replacing this plate cylinder 2, each cam 18
Initialize by adjusting the phase shift in the rotational direction of a, 18b, 19a, 19b.

〔The invention's effect〕

According to the present invention, even in each plate cylinder 2 in the different exchange drum unit 1, the receiving roller 1 against the twist of each plate cylinder 2
The follow-up operation of 0, 10a can be automatically performed, and further, the device includes cams 18a, 18b, 19a, 19b and stoppers 20, 21, 22, 23.
It can be obtained with such a simple configuration. In addition, when the replacement cylinder unit is replaced, the receiving roller 1 for the plate cylinder 2
The initial adjustment of the contact amount (nip width) of 0, 10a can be easily performed.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a development view,
FIG. 2 is a sectional view taken along the line II-II in FIG. 1 is an exchange cylinder unit, 2 is a plate cylinder, 5 and 6 are bearing devices, and 10 and 10
a is a contact roller, 16 and 16a are rotary levers, 18a and 19a are cams, 2
0 and 22 are stoppers.

Claims (1)

[Claims] 1. An interchangeable body unit 1 is attached to a main body side equipped with an attachment roller device so as to be exchangeable, and both ends of the attachment rollers 10, 10a of the attachment roller device are rotated by levers 17, 17, 16a. , 17a
To support the plate cylinders 2 of the respective exchange cylinder units 1 in a biasing contact with each other, and to support one end of the bearing devices 5 and 6 for supporting both ends of the plate cylinder 2 of the exchange cylinder unit 1. A double roller bearing device for the exchange cylinder unit 1 in a roller forming device for an exchange cylinder type rotary printing machine eccentrically rotatable.
5,6, arc-shaped cams 18a, 18b, 19a, against which the stoppers 20, 21, 22, 23 provided on the rotary levers 16, 17, 16a, 17a for supporting both ends of the attachment rollers 10, 10a abut. 19b is fixed to each of the bearing devices 5 and 6 so that the position can be adjusted in the rotational direction, and at least the cams 18a and 19a of the cams 18a and 19a that are fixed to the eccentrically rotatable bearing device 5 side contact the stoppers 20 and 22. A contact roller device in a rotary cylinder type rotary printing press, wherein a contacting outer peripheral shape is such that a distance from a rotation center of the outer peripheral surface to a peripheral surface gradually increases in a circumferential direction.