JP2002113839A - Apparatus for positioning cylinder sleeve on support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the inclination of a sleeve for supporting a functional layer during assembly. SOLUTION: A cylinder apparatus for an electrographic printing unit has end surfaces 4 and 7 fitted to a support 1, a cylinder sleeve 6 is supported on the circumferential surfaces of the end surfaces, and the functional layer 16 is fitted to the circumferential surface of the cylinder sleeve. The apparatuses 1, 4, 6, and 7 have devices 21, 25, 27, 28, and 29 for positioning the cylinder sleeve 6 in advance when the cylinder sleeve 6 is replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for positioning a trunk sleeve on a support, and more particularly to a device for positioning a trunk sleeve having a functional layer, for example, a photoelectric layer, mounted on a peripheral surface.

[0002]

2. Description of the Related Art U.S. Pat. No. 5,215,013 discloses an apparatus for attenuating noise when a sleeve-like rubber blanket is fitted over the peripheral surface of a plate cylinder. The device is advantageously mounted on a printing device of an offset printing press with a grooveless printing cylinder. The rubber blanket sleeve is circumferentially expandable, so that the inner surface of the rubber blanket sleeve is subjected to a pneumatically generated pressure. The expanded rubber blanket sleeve is then slid telescopically over the circumference of the barrel from the side. The rubber blanket sleeve is provided with an attenuation ring for attenuating noise generated by discharging compressed air from the side. The damping ring dampens high frequency noise caused by the vibration of the rubber blanket sleeve under pressure. An outflow opening is provided in the trunk surface at a location where a rubber blanket sleeve is mounted to be fitted over the trunk surface from the side. These outlet openings create and maintain an air cushion as the rubber blanket sleeve is fitted over the circumference of the barrel.

[0003] US Patent No. 5,649,267 discloses that
A cylinder device that can be used in a printing unit is described. A substantially drum-shaped body device is provided with a substantially sleeve-shaped element, and a toner image is generated on the peripheral surface of the element. The torso peripheral surface has an open end, the end surface of which is supported by a plate-like circumferential surface that supports the peripheral surface. The end face capable of closing the opening of the body-shaped peripheral surface is cooled before assembly and then inserted into the peripheral surface opening. The end faces shrink-fitted to the peripheral surface of the body in this way are respectively supported by bearings. In this bearing, a shaft formed as a support and passing through the body device in the axial direction is adopted. The eccentricity of the drum peripheral surface with respect to the rotating shaft is adjusted by the adjusting screw provided on the end face.

[0004] In an electrographic printing unit having a cylinder provided with a functional layer, for example, a photoelectric layer, on its peripheral surface, the functional layer is worn out and must be replaced. For easy replacement, the sleeve containing the functional layer is replaced inside or outside the printing unit. In this case, the torso sleeve supporting the functional layer must be fitted at an accurate position.

[0005]

In view of the means known from the prior art and the technical problems mentioned above, it is an object of the present invention to prevent the sleeve supporting the functional layer from tilting or tilting during assembly. It is.

[0006]

This object is achieved according to the invention by the features of claim 1.

[0007]

The advantages of the measures according to the invention are, inter alia,
Due to the prepositioning of the barrel sleeve, on the one hand, the functional layers on the barrel sleeve are not damaged by improper processing during the replacement process. On the other hand, tilting of the cylinder sleeve as well as tilting during replacement can be avoided. By providing a prepositioning device, the cylinder sleeve can be changed in a horizontal position in a printing press of a printing unit that operates according to the electrographic principle. In this case, the shortest equipment time is maintained.

In a further advantageous development of the idea underlying the invention, the device for prepositioning contacts the inner wall of the torso sleeve. This ensures that the sleeve can be fitted exactly axially over the entire length of the sleeve in the axial direction, in particular in the region of the starting end, which can be disadvantageously inclined.

[0009] In a further embodiment, a device for pre-positioning the torso sleeve is mounted on the torso element. The sleeve-like element, which can be made up of one or more parts, is easily accommodated in a support which penetrates the drum device and is mounted on the support so as to be detachable and therefore easily replaceable.

According to another advantageous embodiment of the idea underlying the invention, a sleeve-like element is mounted on a support which extends through the barrel device. In addition to the centering of the sleeve-shaped element and thus the centering of the device for prepositioning the sleeve, a simple exchange of the sleeve-shaped element takes place.

According to another embodiment of the device for pre-positioning the torso sleeve, the device for pre-positioning the torso sleeve extends from the wall of the sleeve-like element to the inner wall of the torso sleeve to be positioned. It is formed as follows. In addition to increasing the strength of the torso device after axially fitting the torso sleeve, if the device for pre-positioning the torso sleeve is formed in a web shape, not only is the torso device strengthened, The weight is significantly reduced compared to a solid formed cylinder. The device for prepositioning the torso sleeve extends radially with respect to the support and over the entire axial length of the support. However, the device for prepositioning the cylinder sleeve may also be provided in individual sections divided over the axial length of the support or sleeve-like element.

In order to simplify the assembling or replacement of the torso body, a device for pre-positioning the torso sleeve comprises:
It extends parallel to the axis of rotation of the support. As a result, the centering of the circumferential surface of the cylinder sleeve is already obtained in the range of the front positioning. In this case, the final centering is performed by previously tightening the centering surface having the inclined portion provided on the end surface. Final centering to improve accuracy may be performed by clamping the end faces side to side.

According to another embodiment, a device for pre-positioning the cylinder sleeve is in frictional contact with the inner wall of the cylinder sleeve. In addition to the frictional connection between the front positioning devices for supporting the torso sleeve over its entire circumference, between the end region of the substantially radially extending device for prepositioning the torso sleeve and the inner wall of the torso sleeve It is also conceivable to provide a shape-connecting connection as a notch extending in the longitudinal direction, for example as a notch in the shape of a longitudinal groove. The longitudinal groove can be particularly advantageously formed very simply on the inner surface of the sleeve. In addition to the longitudinal grooves, it is also possible to form slit-shaped openings in the inner wall of the cylinder sleeve, on the peripheral surface of which a functional layer as an electrographic layer is formed.

According to the measures of the invention, the reduction of the weight of the torso device is achieved, in particular, by forming a hollow space between the web-like radially extending individual devices for prepositioning the torso sleeve. It can be obtained by: Around the entire circumference of the torso device, for example, there can be provided six radial web-shaped walls, which are positioned at an angle of approximately 60 ° to one another. Here, instead of the six webs formed as described in the examples below, four or eight webs may be formed inside the drum at an angle of 90 ° or 45 ° to each other.

Not only is the device for pre-positioning the torso sleeve contacted in certain sections, but also the web-shaped pre-positioning device engages the full axial extension of the torso sleeve. Is also good. The axial extension of the cylinder sleeve corresponds exactly to the distance between the end faces of the cylinder device. Instead of a consistent contact between the web-shaped front positioning device of the torso sleeve and the inner wall of the torso sleeve, a bridge-like section with individual breaks in the direction of the axial extension of the torso sleeve is provided. It may be provided.

According to another embodiment of the object on which the invention is based, a photoelectric layer may be provided on the peripheral surface of the barrel sleeve. The cylinder device is used, for example, for an electrographic printing unit. In this printing unit,
Depending on the predetermined acceptable ratio of the surface of the functional layer, the layers need to be replaced. The printing unit in which the cylinder device proposed according to the invention is used can process web- or sheet-like material, in which case the printing unit includes
A plurality of torso and replaceable torso sleeves are provided.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 1 shows a longitudinal section of a torso device according to the invention in which a torso sleeve for accommodating a functional layer is positioned at two end faces.

Two bearing journals 2, 3 are formed on a support 1 which is penetrated by holes and extends substantially rotationally symmetrically with respect to the axis of rotation. A first end face 4 and a second end face 7 are supported on the support 1 in the region of the seating surface. The end face 7 is fixed in position to the support 1 in the axial direction by a stopper 31, and the first end face 4 is fixed to the peripheral surface of the support 1 by a tensioning device that can be disengaged from the seat surface.

A centering surface 5 is formed on the peripheral surface of the end surface 4 or 7, and this centering surface 5 may be formed as an oblique chamfer as shown in FIG.
The slanted chamfered portion is oriented to the first end face 4 or the second end face 7 so as to be inclined toward the inside of the trunk device. First end face 4 acting as centering face 5
The oblique chamfered portion 15 is formed on the body sleeve 6 to be fixed in position here in a complementary manner to the oblique chamfered portion of the second end face 7. With the beveled chamfer 5 or 15,
The torso sleeve 6 is frictionally attached to the end face 4 or 7 via the positionable end face 4. A functional layer 16 is formed on the surface of the trunk sleeve 6. This functional layer may be, for example, a photoelectric layer.

The first end face 4, which can be positioned concentrically with the bearing journal 3 on the peripheral surface of the support 1, is fixed in position by a grooved nut 11. A grooved nut 11, which can be screwed onto a thread 10 formed in the bearing journal 3, acts on a pressing body 12, which itself loads a deformable sleeve 13. The sleeve 13 is supported on an annular flange surface of the support 1. When rotating the grooved nut 11, the pressing body 12 is preloaded in the axial direction, whereby the sleeve 13 is deformed in the radial direction. This allows
A first end face 4 is detachably fixed on the support 1 at its seating surface. Depending on the pressing of the positionable first end face 4 against the axially fixed second end face 7, the degree of overlap 18 between the centering surfaces 5, 15 is adjusted. In particular, the eccentricity of the sleeve 6 and thus of the functional layer 16 is adapted to the respective application.

A sleeve 17 is supported on the peripheral surface of the support 1 between the first end face 4 and the second end face 7. On the peripheral surface of the sleeve 17, individual devices extending in the radial direction are formed for pre-positioning the torso sleeve 6.

FIG. 2 shows a cross-sectional view of the drum device of FIG. FIG. 2 clearly shows the position of the sleeve 17 accommodated on the peripheral surface of the support 1. The support 1 is provided with bearing journals 2 and 3 on the side.
Are supported on the side walls of the printing press unit by these bearing journals 2, 3 and are driven by a row of rollers or a direct drive. From the peripheral surface of the sleeve-like element 17 which is provided on the peripheral surface of the support 1 and for which a through-hole 19 is provided, in FIG. Extending. Devices 21; 25, 2 for these prepositions extending in web form
6, 27, 28 and 29 are positioned at an angle of about 60 ° with respect to each other, forming a cavity 20 therebetween. Instead of the six radially extending front positioning devices shown in FIG. 2, four web-like front positioning devices may be provided. These four webs are arranged at an angle of 90 ° to each other. If eight radially extending front positioning devices are formed on the peripheral surface of the sleeve 17, they form cavities at an angle of approximately 45 ° to one another. These devices for prepositioning, which are formed by rib structures, have the advantage of reinforcing the torso structure of FIG. 1 and reduce the weight. The upper surface of each device 21 for prepositioning formed in a web shape; 25, 26, 27, 28, 29 is formed such that these devices have an inclined portion in a starting end region. The torso sleeve 6 is positioned on the inclined portion, and is fitted to the web-like element from the side. This takes place with the second end face 7 remaining on the printing press. That is, the position of the end face 7 in the axial direction in the support 1 is defined. The inclined portion of each front positioning device allows the cylinder sleeve 6 having the functional layer formed thereon to be laterally fitted onto the second end face fastened to the printing press without tilting or tilting. be able to.

Even when the support 1 is in a horizontal position laterally outside the printing press unit, the cylinder sleeve 6 can be assembled very well. For this purpose, the support body 1 and the sleeve 17 accommodated in the support body can be deformed after releasing the end face 4 by releasing the tension of the grooved nut 11 and thus releasing the tension of the pressing member 12. 13 is lightened, so that the first end face 4
Is positioned so as to be taken out laterally from the bearing surface on the peripheral surface of the support 1 via the bearing journal 3. After releasing the first end face and removing this component, the torso sleeve 6 is moved laterally into the web-like element 2.
1; 25, 26, 27, 28, 29. In this case, when the second end face 7 is positioned in the axial direction,
May remain positioned. On the one hand, the second end face 7 is axially fixed by a sleeve 17 provided in the circumferential direction of the support 1 and by a stopper face 31.

After removing the torso sleeve 6 with the worn functional layer 16, the torso sleeve 6 with the replaced functional layer 16 formed thereon is again pressed into the support 1 by axial pressing. Positioned. For this purpose, the torso sleeve 6 is brought into a horizontal position via a device for pre-positioning the torso sleeve 6 and is, from the side, fitted over a web-shaped device for pre-positioning. The centering surface 15 of the torso sleeve 6 contacts the centering surface 5 of the second end surface 7, the first end surface 4 of the contact between the centering surfaces 5 and 15 is tightened, and in the area of the end surface there is a corresponding overshoot in the centering surface. After the lap area 18 has been adjusted, the first end face is clamped to the support 1 at its seat by the grooved nut 11 and the deformable sleeve 13.
Thereby, the eccentricity of the working surface with respect to the axis of rotation of the support 1 is adjusted very accurately.

In the end region of the device 21 for prepositioning the sleeve 6; 25, 26, 27, 28, 29, the inner wall 23 of the sleeve 6 is prepositioned rather than frictionally positioned. Can be positively connected to the inner wall of the torso sleeve 6. For this purpose, the inner wall 23 of the body sleeve 6 can be provided with longitudinal grooves or slits extending in the axial direction. Device 21 for radially extending front positioning; 25, 26, 2
It is also conceivable to provide point-like ridges and locking connections between the end regions 7, 28, 29 and the inner wall 23 of the sleeve 6.

The sleeve 17 fitted with the radially extending prepositioning device 21; 25, 26, 27, 28, 29 can be made from plastic or plastic with metal reinforcements. Wall thickness 24
May also be a plastic or metal sleeve with a metal layer. To reduce weight, individual web surfaces 30 may be pierced by through holes that reduce weight and material. Instead of providing a continuous contact surface at the radial end of the device for prepositioning, these devices may only partially contact the inner wall 23 of the torso sleeve 6. This leaves a free surface between the individual end regions that contact the wall 23. With such a configuration not shown, a weight reduction of such a trunk device is obtained in addition to the reinforcing effect.

[Brief description of the drawings]

FIG. 1 shows a longitudinal section through a torso device according to the invention with a replaceable torso sleeve to which a functional layer is attached.

FIG. 2 is a cross-sectional view of the trunk device of FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 support, 2, 3 bearing journal, 4 first end face, 5 centering face of end face, 6 trunk sleeve, 7 second end face, 8, 9 seating face, 10 thread, 11 grooved nut, 12 pressing body , 13
Deformable sleeve, 14 centering surface at end face,
15 centering surface of sleeve, 16 functional layer,
17 sleeve, 18 overlap area, 19
Through hole, 20 hollow chamber segment, 21 positioning web, 22 positioning surface, 23 inner wall of trunk sleeve, 24 wall thickness, 25, 26, 27, 28, 29
Web, 30 faces, 31 stopper

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Gregory Kowalski USA New York Victor The Grove 1147 (72) Inventor James Sifley USA New York Spencer Port Stony Point Road 514

Claims (18)

[Claims] 1. A cylinder device for an electrographic printing unit, comprising an end surface (4, 7) mounted on a support (1), a cylinder sleeve (4) on the peripheral surface of said end surface. 6) in which a functional layer (16) is mounted on the peripheral surface of the torso sleeve, wherein the device (1, 4, 6, 7) comprises a torso sleeve (6). Characterized in that it has a device (21; 25, 26, 27, 28, 29) for pre-positioning the cylinder sleeve (6) during the replacement of Torso device. 2. A device for positioning in advance (21; 2).
5. The torso device according to claim 1, wherein the at least one of the first, second, third, fourth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, fifth, sixth, thirteenth, thirty-eight 3. A device for prepositioning (21; 25,
26. The cylinder arrangement according to claim 1, wherein the cylinders (26, 27, 28, 29) allow sufficient centering of the cylinder sleeve. 4. A device (21; 2) for prepositioning a torso sleeve (6) on a sleeve-like element (17).
5, 26, 27, 28, 29) are attached.
The trunk device according to claim 1. 5. The torso device according to claim 4, wherein the sleeve-shaped element is mounted on a support which extends through the torso device. 6. A device (21; 25, 26, 27, 28, 29) for pre-positioning the torso sleeve (6) is provided from the wall of the sleeve-like element (17) by a torso sleeve (6) to be positioned. ) To the inner wall (23),
The trunk device according to claim 1. 7. The cylinder device according to claim 1, wherein the device for prepositioning the cylinder sleeve is formed in web form. 8. The device (21; 25, 26, 27, 2)
8, 29) extending radially from the support (1);
The trunk device according to claim 7. 9. The device for prepositioning a torso sleeve (6) (21; 25, 26, 27, 28, 29) extends parallel to the axis of rotation of the support (1). Item 7. A trunk device according to Item 1. 10. The device (21; 25, 26, 27, 28, 29) for prepositioning the torso sleeve (6) comprises:
2. The torso arrangement according to claim 1, wherein the inner wall of the torso sleeve is in frictional contact with the inner wall. 11. A device (21; 25, 26, 27, 28, 29) for prepositioning the torso sleeve (6) comprises:
2. The trunk device according to claim 1, wherein the trunk device engages a notch provided in an inner wall of the trunk sleeve. 12. The torso device according to claim 10, wherein the notch is formed as a longitudinal groove in the inner wall of the torso sleeve. 13. A hollow space (20) is formed between the devices (21; 25, 26, 27, 28, 29) for prepositioning the torso sleeve (6). Torso device. 14. The axial extension of the device (21; 25, 26, 27, 28, 29) for prepositioning the torso sleeve (6) corresponds to the two ends of the torso device (1, 4, 6, 7). 2. The body device according to claim 1, which corresponds to the distance between the surfaces. 15. The peripheral surface (16) of the torso sleeve (6)
The trunk device according to any one of claims 1 to 14, which is a photoelectric layer. 16. A cylinder device for an electrographic printing unit, comprising an end surface (4, 7) attached to a support (1), the peripheral surface of which is a cylinder sleeve. (6) is supported, and the peripheral surface of the body sleeve is formed as a photoelectric layer (16). A cylinder device for an electrographic printing unit, characterized in that it has a device (21; 25, 26, 27, 28, 29) for pre-positioning the cylinder sleeve (6) during replacement. 17. A printing press having a cylinder device for electrographic printing, comprising an end surface (4, 7) mounted on a support (1), the peripheral surface of said end surface. A torso sleeve (6) is supported on a peripheral surface of the torso sleeve (6), and a functional layer (16) is attached to the torso sleeve (6). Electrographic printing, characterized by having a device (21; 25, 26, 27, 28, 29) for pre-positioning the cylinder sleeve (6) when replacing the cylinder sleeve (6). Printing press with a cylinder device for printing. 18. A printing unit for processing sheet- or web-shaped printing material, comprising a cylinder device for electrographic printing, mounted on a support (1). An end surface (4, 7) is provided, and a trunk sleeve (6) is supported on the peripheral surface of the end surface. A functional layer (16) is attached to the peripheral surface of the trunk sleeve (6). A device (21; 25, 26, 27, 28, 29) for pre-positioning the torso sleeve (6) when replacing the torso sleeve (6). A printing unit for processing sheet- or web-shaped printing material, characterized in that: