JPH0711975Y2 - Roller drive - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller driving device.

[0002]

In various roller applications, care must be taken to ensure stable rotation of the roller. At that time, there is generally a problem that the roller is vibrated by an external force.

In this regard, German published patent publication DE-
A1-3033250 deals with the problem of vibrational excitation in the drive of rotating shafts and rollers in a folding machine. In this case, the cause of the vibrations is that the rims of the folding machine, which are elastically supported in order to adapt to different thicknesses of the folded sheets, and the gears are not optimally meshed. In order to damp such vibrations,
The roller and the rim supported by this roller are drive-coupled by form or frictional engagement. At this time,
Advantageously, the damping member is made of a rubber-like elastic material.

A similar embodiment has also been proposed in the case of the gear drive of the ink rollers of the inking unit of a rotary printing press according to German Patent DE-C1-3342877. In this case, the corresponding damping means are directly directed to the vibrations due to the periodic shocks transmitted from the transfer roller to the ink roller.

The problem of such shocks transmitted from the ink transfer roller to the ink roller is further discussed in DE-A 2303738. However,
Here the means are not aimed at suppressing the vibration of the ink roller excited by the ink transfer roller,
It is only intended to isolate the vibration of the inking roller, which is excited by the following roller of the inking unit.

For this purpose, the ink roller, which is excited by the ink transfer roller, is disengaged from the drive means of the following roller, the drive of said ink roller being realized by friction and adhesion with the roller immediately after the inking unit. To be done. With this method, however, satisfactory drive of the ink roller is only possible in steady-state operating conditions. In a steady operation state, the circumferential force of the immediately following roller can be transmitted to the ink roller through the ink gap between the ink roller and the roller immediately after that, based on the shearing force of the ink gap and the boundary friction force. it can. And for all other operating conditions, an additional device is provided to drive the ink roller.

[0007]

The object of the present invention is to provide a solution different from the prior art to the problems that occur in the context of roller driving when there are disturbance factors that hinder the stable rotation of the roller. It is to be.

[0008]

In the present invention, the above problems are solved by a roller driving device having the following features.

That is, the first torque transmitting member forming the first rotatably supported first rotating member is provided, and the second torque rotatably supported independently of the first rotating member. The second torque transmission member forming the rotating body is coaxial with the first rotating body, and is provided on the first boundary surface provided on the first rotating body and the second rotating body. The second
And an interface between the first and second sealing members to form a closed annular chamber, the first and second sealing members extending the length of the annular chamber. At a determined mutual spacing and slidably arranged with respect to at least one of the two contact surfaces, the annular chamber is filled with a transmission fluid, and one of the two torque transmission members is That is, the roller body is connected so as not to rotate, and the other torque transmission member is drivingly connected to the drive means.

[0010]

The roller drive for damping the shock and vibration can be realized by the drive means equipped with the Fettinger coupling. In such a coupling, as in the subject of the present invention, the transmission of torque from the first rotating body to the second rotating body is carried out by the transmission fluid. However, the annular chamber filled with the transmission fluid has a relatively complicated structure. The structure has a generally torus outer shape, and has at least one pump impeller and a turbine impeller coaxial with the pump impeller inside. This turbine impeller is rotated by the action of the dynamic pressure of the transmission fluid created by the pump impeller. Such costly couplings may be unsuitable, especially for transmitting relatively small torques, and are often unusable at all due to space considerations due to their relatively large construction. Let's do it. On the other hand, the device of the present invention according to claim 1 exhibits the advantage of a very space-saving structure when just transmitting a relatively small torque.

Another advantage of the invention is that it only requires a slight modification of a conventional roller drive, for example operated by a gear train, to make a device according to the invention. Furthermore, it is advantageous that the above modifications are essentially limited to the members originally required for roller driving, for example by means of conventional gear trains.

Further, it is apparent that the application of the driving device according to the present invention to an ink kneading roller in which ink is periodically supplied by an ink transfer roller of an inking device of a printing machine is advantageous for the following reasons. is there. With this drive, all operating conditions, in particular when starting, for example, a cleaned inking unit, as described above, without the need for an additional device to ensure a reliable drive of the ink kneading roller in such operating conditions, The torque can be transmitted to the above ink kneading roller.

An advantageous construction of the drive according to the invention is 2
One of the two torque transmission members is a rotary shaft that is arranged coaxially with the roller body, supports one end of the roller body, and is coupled to the roller body so as not to rotate, and the other torque transmission member serves as a drive means. It is a driven wheel that can be driven through.

In this case, instead of the normally non-rotating connection between the rotary shaft and the driven wheel that surrounds the rotary shaft, an annular path is provided between the driven wheel and the rotary shaft, and the annular path is provided on the driven wheel side. The annular chamber can easily be realized by closing the end faces with suitable sealing means. Now, especially when the rotating shaft, which is connected to the roller body of the ink kneading roller so as not to rotate, moves toward the driven wheel in the longitudinal direction, as is commonly used in the laterally moving ink kneading roller, when the driven wheel is For that purpose, they usually have additional bearings fixed to the machine frame independently of the bearings of the rotating shaft. Therefore, in order to form the drive according to the invention, the design preconditions necessary for the drive of the laterally moving ink kneading roller have already been fulfilled and, as mentioned above, only a few corresponding conventional drives are required. Just fix it.

Another advantageous configuration of the drive device according to the invention is that one of the two torque transmitting members is arranged coaxially with the roller body, penetrates at least partially through the roller body and drives the drive means. Is a rotating shaft that can be driven via
The other torque transmitting member is the roller body itself.

In such a structure, the roller body of the ink kneading roller is preferably provided as a hollow roller, as is commonly used in the laterally moving ink kneading roller. The hollow roller moves in the vertical direction toward a stationary rotation shaft arranged at the center of rotation of the hollow roller.

Another advantageous embodiment has an interface ridge along the region in which at least one of the two rotors is between the first and the second sealing member, the ridge depending on the rotor. It is characterized in that it is arranged on the outer periphery of the formed boundary surface, extends substantially in the axial direction of the rotating body, and is formed so as to reduce the cross section of the annular path.

With such a structure, the torque that can be transmitted can be made larger than that of a structure having a cylindrical boundary surface, for example.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In the embodiment shown in FIG. 1, a first torque transmitting member forming a first rotating body formed by a rotary shaft 1 and a second torque forming member forming a second rotating body formed by a driven wheel 2. And a torque transmission member. The two rotating bodies are supported so that they can rotate independently of each other. For this purpose, a bearing bush 4 fixed to the wall 3 is provided for the rotary shaft 1. The driven wheel 2 is supported in a bearing casing 6 by a bearing ring 5 which surrounds its hub. The bearing casing 6 itself is still the wall 3
It is fixed to. In this case, the rotary shaft 1 and the driven wheel 2 have the same axis.

The outer wall surface of the rotary shaft 1 and the outer wall surface of the central hole of the hub of the driven wheel 2 form a first boundary surface 7 and a second boundary surface 8. The two boundary surfaces 7 and 8 surround an annular passage 9. A sealing member 10 is provided at each end of the central hole of the hub of the driven wheel 2 so that the annular passage is sealed to the annular chamber. The length of the annular chamber is
It is determined by the distance between the sealing members 10. At this time, the sealing member 10 is formed so as to be slidable toward at least one of the two boundary surfaces 7 or 8.

The first rotary body configured as the rotary shaft 1 is arranged coaxially with the roller body 11 of which only a part is shown, is connected so as not to rotate with the roller, and It supports one end.

The second rotating body, which is designed as a driven wheel 2, has external teeth and meshes with a gear wheel 12 supported on the wall 3. The gear 12 is a constituent part of a driving means not specifically shown.

Finally, the annular chamber formed by the annular passage 9 and the two sealing members 10 is filled with transmission fluid. A highly viscous liquid is particularly suitable as the transmission liquid.

The operation method of such a driving device formed according to the present invention is as follows.

The driven wheel 2 rotated by the driving means via the gear 12 exerts a circumferential force on the interface of the liquid column which is enclosed in the annular chamber and contacts the interface via the interface 8. This liquid column is rotated. The liquid column rotates the rotary shaft 1 by transmitting the circumferential force to the boundary surface 7 of the rotary shaft 1.

In the case of the configuration shown in FIG. 2, the two boundary surfaces 7 and 8 are each formed as an outer wall surface of a cylinder having a circular cross section. Such formation requires minimal manufacturing costs.

Another configuration is at least one of the two rotating bodies.
Interface 7 or 8 along the area between the two sealing members.
Of the contact surface 7 or 8 and extends substantially in the direction of the axis of rotation of the rotating body.
It is formed so as to reduce the cross section of the annular passage 9. This configuration is realized in an extremely diverse manner according to the configuration example of the illustrated annular passage 9. Such a configuration of the raised portion 13 is most clearly recognized in the portion illustrated in FIG. 7 of the rotating body formed as the rotary shaft 1. Here, for example, the raised portion 13 arranged on a part of the circumference of the rotary shaft 1 is provided as a tooth-shaped projection extending in the longitudinal direction of the rotary shaft 1. However, according to FIG. 3, such a tooth-like protrusion is a boundary surface (boundary surface 8 in this case).
Can be distributed over the entire circumference of, and in particular can extend over most of the length of the area between the sealing members 10 of the corresponding interface (in this case also interface 8).

In all other respects, there are no restrictions regarding the formation of the cross section of the ridge 13.

For the special case in which the drive according to the invention is used to drive the rollers of a longitudinally oscillating inking unit, the embodiments of FIGS. 1 and 4 are particularly suitable, as will be explained below. .

According to FIG. 1, the rotary shaft 1 whose one end is connected to the roller body 11 so as not to rotate, extends beyond the driven wheel 2 at the other end and has a circumferential groove 14. This circumferential groove can be engaged in a known manner, for example with a roll of a swivel roll lever (not shown), to give the rotary shaft 1 and thereby the roller body 11 vibration in the above-mentioned direction. Due to this vibration, the ridge 13 formed on the boundary surface 7 of the rotating shaft, which extends over only a part of the entire length of the liquid column, moves toward the boundary surface 8 and the liquid column. The ridges 13 extending over a short part of the length of the liquid column, and the ridges 13 being arranged on the rotary shaft 1, on the one hand enable a smooth vibration of the rotary shaft 1, and on the other hand Then
The rotation transmission liquid flows through the space between these raised portions 13 in the longitudinal direction of the rotary shaft 1. In other words, the ridge 1
3 makes the liquid column rotated by the driven wheel 2 flow in the longitudinal direction of the rotary shaft 1. Thereby the ridge 13
Acts in a similar manner to the turbine blades, and torque is usually applied from the driven wheel 2 via the transfer fluid to the rotating shaft 1 by the boundary friction and shear forces, and thus also the roller body 1.
Help to be transmitted to 1.

The embodiment according to FIG. 4 has a first torque transmission member forming a first rotating body formed by the rotary shaft 15. On the other hand, the second torque transmission member forming the second rotating body is formed by the roller body 11 'itself to be driven. A bearing bush 4 ', which is fixed to the wall 3'with respect to the rotary shaft 15, is provided for coaxially supporting the two rotary bodies so that they can rotate independently of each other. On the other hand, the end of the roller body 11 'facing the wall 3'is rotatably inserted in a bearing bush 16 coaxial with the bearing bush 4', which is also fixed to the wall 3 '. The roller body 11 ′ is partially penetrated by the rotary shaft 15.
The first boundary surface 7'is formed by the outer surface of the rotating shaft 15, and the second contact surface 8'is formed by the outer wall surface of the central hole of the roller body 11 'through which the rotating shaft 15 penetrates. First contact surface 7 '
The annular passage 9 formed between the second contact surface 8'and the second contact surface 8'is sealed in the annular chamber by a sealing member 10 as in the case of FIG. There is also transmission fluid in this annular chamber.

Unlike the example of FIG. 1, in this case the rotary shaft 1
5 is connected to the drive wheel 17 so as not to rotate. The drive wheel 17 is drivingly connected to a drive means (not shown) and is supported by a bearing bush 6 shown in broken lines as in the embodiment of FIG. 1 in order to reduce vibration.

Similar to the embodiment shown in FIG. 1, also in the embodiment of FIG. 4, the torque introduced into the rotary shaft 15 via the drive wheel 17 causes the two contact surfaces 7'and 8'and the two sealing surfaces to be sealed. Due to the boundary frictional force and the shearing force inside the annular chamber formed by the member 10 and filled with the transmission fluid, the roller body 1
1'is transmitted.

In accordance with a variant of the loop 9 shown in FIGS. 2 and 3 of the exemplary embodiment according to FIG. 1, a loop 9 modified according to FIGS. 5 and 6 can also be provided in the exemplary embodiment shown in FIG.

As mentioned above, the embodiment shown in FIG. 4 is also particularly suitable for the special use case in which the drive according to the invention is used to drive longitudinally vibrating rollers of an inking unit of a printing press. . The longitudinal vibration of the roller body 11 ′ is possible on the one hand by a vertically movable support by a bearing bush 16 and, on the other hand, the ridges 13 formed on the contact surface 7 ′ of the rotary shaft 15 have an annular chamber. This is possible by extending only a small part of the total length of the liquid column that fills up. Such ridges 13 act in a similar manner to the pump vanes when the roller body 11 'vibrates, and again the torque is normally due to boundary friction and shear forces from the drive wheels 17 through the transmission fluid to the roller body 11'. To be communicated to.

Means for exciting the vibrations are not shown in FIG. 4 since they are not included in the subject matter of the present invention. Such means can be provided, for example, at the second end of the roller body 11 '(not shown) in the arrangement example of the roller body 11' according to FIG.

FIG. 8 shows a drive unit according to the present invention for a plate cylinder 18
An example in which the roller arrangement configuration of the inking device of the printing machine in cooperation with the above is advantageously incorporated is shown. In this case, such a drive is provided for the first leveling roller. The leveling roller intermittently contacts the ink transfer roller 19. In FIG. 8, instead of this leveling roller,
A driven wheel 2 or a driving wheel 17 which is coaxially engaged with the gear 12 of the driving means is shown.

[Brief description of drawings]

FIG. 1 is a sectional view of a first configuration example of a driving device according to the present invention.

FIG. 2 is a partial cross-sectional view around an annular road in a modified example in which the annular road is changed from FIG.

FIG. 3 is a partial cross-sectional view around an annular road of still another modified example in which the annular road is changed from FIG.

FIG. 4 is a sectional view of a second configuration example of the driving device according to the present invention.

FIG. 5 is a partial cross-sectional view around an annular road of a second configuration example in which the annular road is changed from FIG.

FIG. 6 is a partial cross-sectional view around an annular road according to still another modified example in which the annular road is changed with respect to FIG.

FIG. 7 is a perspective view of a rotating body having a ridge formed so as to reduce the cross-sectional area of the annular path.

FIG. 8 is a schematic view of a roller system of an inking device of a printing machine equipped with a driving device according to the present invention.

[Explanation of symbols]

 1 rotating shaft 2 driven wheel 3, 3'wall 4, 4'bearing bush 5 bearing ring 6 bearing casing 7, 7'first contact surface 8, 8'second contact surface 9 annular path 10 sealing member 11, 11 'Roller body 12 Gear 13 Protrusion 14 Circumferential groove of rotating shaft 1 Rotating shaft 16 Bearing bush 17 Drive wheel 18 Plate cylinder 19 Ink transfer roller

Claims (4)

[Scope of utility model registration request] 1. A first torque transmission member forming a rotatably supported first rotating body (rotating shaft shaft 1, rotating shaft 15), rotatably and first rotating. The second torque transmitting member forming the second rotating body (driven wheel 2, roller body 11 ') supported independently of the rotating body (rotating shaft shaft 1, rotating shaft 15) is the first rotating body (rotating shaft). The shaft 1 and the rotating shaft 15) are arranged coaxially with each other, and the first boundary surface (7, 7 ′) provided on the first rotating body (the rotating shaft 1 and the rotating shaft 15) and the second Second boundary surface (8, 8) provided on the rotating body (driven wheel 2, rotating portion 11 ') of
8 ') forms an annular passage (9) which forms a closed annular chamber together with the first and second sealing members (10). 10) are arranged at a distance from each other that determines the length of the annular chamber and are slidable with respect to at least one of the two contact surfaces (7, 7'or 8, 8 '), The chamber is filled with transmission fluid, and one of the two torque transmission members is
1 ') is connected so as not to rotate, and the other torque transmission member is drivingly connected to the driving means. 2. One of the two torque transmission members is arranged coaxially with the rotating portion (11), supports one end of the roller body (11), and is connected to the roller body (11) so as not to rotate. The drive device according to claim 1, wherein the drive device is a rotary shaft (1), and the other torque transmission member is a driven wheel (2) that can be driven through a drive means. 3. One of the two torque transmitting members is arranged coaxially with the roller body (11 '),
2. The drive device according to claim 1, wherein the drive shaft is a rotary shaft (15) which at least partially penetrates 1 ') and can be driven by a drive means, and the other torque transmission member is a roller body (11') itself. 4. Two rotating bodies (1, 2, 11 ', 15)
At least one of the first and second sealing members (10)
Boundary (7,7 ', 8,8') along the area between
Has a ridge (13) of which the rotator (1,
2, 11 ', 15) formed by the boundary surface (7,
7 ', 8, 8') are arranged on the outer circumference of the rotating body (1, 2,
11. The drive device according to claim 1, wherein the drive device extends substantially in the axial direction of 11 ', 15) and is configured to reduce the cross-sectional area of the annular passage (9).