JPH0228468B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] The present invention relates to a cylinder device for a machine that processes sheet-like materials such as a gravure printing machine or an intaglio printing machine, and more particularly relates to a cylinder device for a machine that processes sheet-like materials such as a gravure printing machine or an intaglio printing machine. When the lower cylinder of the machine (e.g. engraving cylinder) rotates with its center portion bent downward, the upper cylinder (e.g. press cylinder) that can move up and down
bend the central part of the body downward according to the amount of deflection,
This invention relates to a cylinder device in which an upper cylinder is brought into uniform contact with a lower cylinder.

FIG. 1 shows a schematic configuration of a general gravure printing machine, which includes an etching cylinder 2 which is rotated within an ink reservoir 1 and is configured to be acted upon by a doctor blade 3. , is provided with a pressing cylinder 5 which is located above and in contact with the etching cylinder 2. The engraving cylinder 2 is supported at both ends by bearings (not shown) on the printing press frame, and is designed to be easily removed and replaced with another one for forme adjustment, and can be easily replaced by another one simply by friction. Unlike the pressure cylinder 5, which is rotated by a pusher, it is rotationally driven by a drive device. The printing paper 4 is pressed against the lower engraving cylinder 2 by the upper pressing cylinder 5, and the engraving cylinder 2 is driven to rotate.
The printing is performed when the paper passes between the cylinders 2 and 5.

In this gravure printing machine, as shown by the arrow 6, a downward pressing force is applied to the engraving cylinder 2 by the pressure cylinder 5, and furthermore, the weight of the engraving cylinder 2 is applied in the same direction. When used, as clearly shown in Figure 2,
The central portion of the engraving cylinder 2 is in a downwardly curved state. Therefore, in order to ensure uniform line contact between the etching cylinder 2 and the pressing cylinder 5 over their entire length, as shown in FIG. The pressing cylinder 5 must be curved downward so as to do so.

This situation is not limited to gravure printing machines, but also applies to sheet material processing machines with similar configurations, such as other printing machines.

[Summary of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent a lower cylinder such as an engraving cylinder of a gravure printing machine from rotating in contact with the lower cylinder when the lower cylinder rotates with its center portion bent downward. The upper cylinder, which is movable up and down, can be deflected so as to uniformly contact the lower cylinder, and even if the lower cylinders have different deflection states, the deflection state of the upper cylinder can be adjusted accordingly. It is an object of the present invention to provide a cylinder device for a sheet material processing machine, which allows both cylinders to operate under optimal conditions.

Another object of this invention is that the amount of deflection of the upper cylinder can be easily adjusted regardless of whether it is in contact with or apart from the lower cylinder, and that it can also be set when the upper cylinder is brought closer to or separated from the lower cylinder. An object of the present invention is to provide a cylinder device for a sheet material processing machine that can maintain a deflected state.

Still another object of the present invention is to be able to reliably lubricate a support member that rotatably supports an upper cylinder therein, and to effectively dissipate heat generated in the support member. It is an object of the present invention to provide a cylinder device for a sheet-like material processing machine in which the temperature rise of the upper cylinder due to the heat generation does not become excessively large and its thermal expansion becomes uniform.

First Invention To achieve these objects, in the first invention, the upper cylinder has a cylindrical outer casing rotatably supported by bearings fixed at both ends to a support frame. and provided inside the outer cover coaxially with it and spaced apart from each other,
In addition, both ends protruding from the openings at both ends of the outer cover are substantially symmetrical with respect to a core supported by a deflection adjustment device provided on the support frame, and the center of the outer cover. At least one support member is attached to the core and supports the outer cover from inside. Further, the deflection adjustment device acts to apply a downward force to both ends of the core body perpendicular to the longitudinal axis thereof, and further moves together with the support frame and is independent of movement of the support frame. configured to operate.

When the deflection adjustment device is actuated to apply a downward force to both ends of the core, this force is transmitted to the outer shell through a support member within the outer shell. Since both ends of the outer cover are restrained by the support frame and cannot be moved up and down, the force can cause the center part of the outer cover to bend downward.

A cylinder device configured along these lines can adjust the outer shell shape of the upper cylinder to match the flexure shape of the lower cylinder, so regardless of the flexure shape of the lower cylinder, the upper cylinder It can always be pressed against the mating cylinder with uniform line contact over the entire length, that is, with a constant pressing force. This also has beneficial effects. In other words, when changing the deflection curve of the outer cover of the upper cylinder in order to obtain a uniform line contact over the entire length with the lower cylinder that is deflected by its own weight, etc., the change in the deflection curve is as described above. This can be easily done by simply applying a larger or smaller load to the outer shell via the core and the support member using the deflection adjustment device.

Furthermore, since both ends of the outer sheath are supported by the support frame in a state separated from the core by dedicated bearings, the downward driving force of the deflection adjustment device is applied to the core and the support frame. The required force of the outer shell is transmitted to the vicinity of the center of the outer shell to be curved directly through the member and without any "lever" action (to amplify the force). The driving force required to obtain the deflection curve is small,
There are also beneficial effects.

Further, the deflection adjustment device is provided on a support frame and moves up and down together with the support frame,
Moreover, since it operates independently of that movement, it can operate regardless of changes in the position of the support frame, and even if the support frame, that is, the upper cylinder, moves up or down, the once set deflection curve of the outer cover remains constant. It promises to have the beneficial effect of maintaining the condition. Furthermore, when the upper cylinder approaches or moves away from the lower cylinder, the contact line of the outer cover can be confirmed from the outside.

Here, it is not important to apply a load to the core body in advance to bend the jacket body before operating the sheet material processing machine, and the force is applied directly to the jacket body by the core body and the support member. It is important that the information is communicated in a clear manner. Therefore, it is not necessary to make both ends of the core body, on which the downward driving force that curves the outer shell acts, protrude long from both ends of the outer shell, and therefore the longitudinal dimension of the cylinder device can be kept extremely short. There are advantages to being able to do so.

Furthermore, except for the part where the outer cover is internally supported by the core by the support member, even in the curved state, the outer cover is rotatably supported by the support frame while floating from the core. Therefore, the upper cylinder can rotate smoothly over the entire speed range without making much noise.

The use of self-aligning or pivoting bearings in supporting the ends of the core by the deflection adjustment device has beneficial effects. In other words, with such a configuration, the direction of the force applied to both ends of the core body by the deflection adjustment device remains constant regardless of how the core curves. will not cause any malfunction.

Further, the outer cover may be configured such that a cylindrical protrusion having a through hole is attached to both ends thereof and is supported by a support frame via the cylindrical protrusion. In this case, both ends of the core are configured to protrude to the outside through the through hole of the cylindrical protrusion. This makes it possible to mount a bearing for the envelope (preferably a self-aligning bearing) on the outside of the cylindrical projection and fix it to the support frame, so that it can be easily attached to said bearing if necessary. This has the effect that it can be modified and maintenance work is extremely easy. In addition, due to the structure in which the above-mentioned outer cover bearing is directly fixed to the support frame,
The advantageous effect is that there is little chance of sagging when the outer shell rotates off-center or when the edges of the outer shell rattle.

One of the configurations that effectively develops the spirit of the first invention is that the deflection adjustment device is a ram device, particularly a hydraulic ram device, which can adjust the working fluid pressure as necessary. There is. According to such a configuration, the adjustment of the force generated by the deflection adjustment device can be easily remotely controlled and easily monitored using a monitor. In this case,
Once the deflection adjustment of the outer shell is completed, the fluid pressure applied to the deflection adjuster can be maintained at a constant value by locking the deflection adjuster, so that the outer shell adapted to the deflection of the lower cylinder can be maintained at a constant value. This has the effect that the bending curve of the body can be easily maintained in a constant state even while adjusting the position by raising and lowering the support frame.

The ram device constituting the deflection adjustment device has its cylinder or outer casing fixed to the support frame, and its piston rod is rigidly connected to both ends of the core. In this case, since the piston rod performs the function of guiding the core, a further advantageous effect is achieved in that a separate guide device for the core is not required.

Second invention In the second invention, in the first invention described above, the ring-shaped space between the core body and the outer cover of the upper cylinder is used as a space for storing oil. The ring-shaped space is not completely filled with oil. The support member or members supporting the envelope therein are configured to allow oil to travel through the support member in the longitudinal direction of the upper cylinder. Further, in the oil storage ring-shaped space, there is at least one tube extending in the radial direction and having a tip thereof close to the inner surface of the outer cover.
Non-rotating strippers are provided. The stripper has a blade arranged obliquely with respect to the direction of rotation of the outer cover, and is configured to send oil toward an adjacent support member as the outer cover rotates.

When the outer cover rotates, the oil stored at an optimal level in the oil storage ring-shaped space by the overflow hole forms a film (layer) on the inner surface of the outer cover due to centrifugal force. It becomes covered.
At this time, the distribution of the oil film formed on the inner surface of the outer cover is uniform. The non-rotating stripper acts to strip off a part of the rotating oil film and constantly feeds oil to the support member adjacent to the stripper.
Problems regarding lubrication of the support member can be completely eliminated.

At the same time, the heat generated by the support member is transferred to the oil quickly and without any problems, and the oil that has taken the heat from the support member is transferred to the inner surface of the outer cover during rotation. Due to the coating and longitudinal movement through the adjacent support members under the action of the stripper, the heat generated from the support members is transferred throughout the envelope. To explain this in another way, the entire envelope is uniformly heated by the heat generated by the support member, and there is no difference in thermal expansion between the different parts of the envelope. This has the effect that there is no possibility of thermal stress occurring inside the envelope due to heat generated by the support member.

This heat is also removed uniformly from the entire length of the envelope by the sheet material, such as printing paper, which is transported by the upper and lower cylinders during processing. Therefore, the heat of the envelope is effectively dissipated and there is no risk of the temperature of the envelope increasing too much.

If the above-mentioned stripper is configured with two blades arranged at a predetermined angle so as not to be parallel to each other, and the direction of inclination of each blade is opposite to each other with respect to the long axis of the core, the outer cover The beneficial effect is to ensure that one blade provides the required oil supply for each of the two possible rotations of the body. In this case, it is preferable that the two blades are arranged symmetrically with respect to the long axis of the core body, such that the angle between the two blades is 90°. This configuration also has the effect that maintenance of the cylinder device is extremely simplified.

Other advantageous developments and derivations of the general teaching of the invention will become apparent from the following description of two embodiments illustrated in the accompanying drawings.

[Detailed description of embodiments of the invention]

First Embodiment FIG. 3 shows a first embodiment in which the cylinder device of the present invention is applied to the press cylinder of the gravure printing press shown in FIGS. 1 and 2.

The pressing cylinder 5 is rotatably supported at both ends by two support frames 7 provided on both sides thereof so as to be movable up and down, and is configured to rotate around a horizontal axis. Although not shown in detail here, both support frames 7 are moved up and down while being guided by rails screwed to the side walls of the printing press frame, and the press cylinders 5 are brought into contact with the etching cylinders 2 located below. Performs the action of moving or separating. The movement of the support frame 7 is typically
This is done by two adjusting rams 8 which are actuated by pneumatic pressure.

The pressing cylinder 5 includes a pipe-shaped outer cover 10 whose surface is covered with a covering 9 made of an elastic material and which is open at both ends, and is provided inside the outer cover 10 coaxially with and penetrating the outer cover 10. The core body 11 has a round bar shape. The core body 11 has a large diameter part 19 having the largest diameter in the center, and has a diameter slightly smaller on both sides, with both ends 16 having the smallest diameter.
The outer diameter of the core body 11 is formed to be smaller than the inner diameter of the outer sheath 10 so that there is a gap in the radial direction between the core body 11 and the outer sheath 10 over the entire length of the outer sheath 10. I have to. In other words, the core body 11 is provided apart from the outer cover body 10. Both ends 16 of the core body 11 protrude from the openings at both ends of the outer sheath 10 to the left and right.

The core body 11 is used to rotatably support the outer cover body 10 from the inside by a support bearing 18, and to act on the outer cover body 10 to create a curved or drooping state as shown in FIG. Ru.

In this embodiment, both ends of the outer cover 10 are connected to the core 1.
A cylindrical body 12 is attached to protrude from both ends of the pipe-shaped jacket 10 in order to support it on the support frame 7 while being spaced apart from the pipe-shaped jacket 10 . The cylindrical body 12 is connected and fixed to each end opening of the outer cover 10 via a flange formed at one end thereof. A portion of each end 16 of the core body 11 projects outward from the cylindrical body 12 through a through hole 15 formed concentrically in the cylindrical body 12 . The outer cover 10 is
Each cylindrical body 12 is rotatably supported by each support frame 7 by two self-aligning bearings 13 mounted on the outside.

The self-aligning bearing 13 is provided so that the outer cover 10 rotates smoothly even when it is bent.
Here, the self-aligning bearing 13 is a self-aligning type rotor type bearing, and the self-aligning bearing 13 is fixed in a bearing pocket 14 formed in each support frame 7, so that it is optimally configured.

By attaching the protruding cylindrical body 12 to both ends of the outer sheath 10, the surface of the cylindrical body 12 that supports the self-aligning bearing 13 can be easily confirmed, and modifications can be made as necessary. It's easy to do,
This has the advantage that maintenance work on the cylinder device is extremely simplified.

The outer cover 10 is connected on its inner surface to two support bearings 18 fixed to the core body 11 symmetrically with respect to the central portion of the outer cover 10 in the longitudinal direction. Therefore, the outer shell 10 receives a supporting action from the core body 11 via each support bearing 18 . Therefore, the outer cover 10 and the core 11 are connected to the support bearing 18.
This means that they are separated except for the part where they touch.

Both ends 16 of the core body 11 protruding from the ends of the outer cover 10 (furthermore, the cylindrical body 12) are controlled by two deflection adjustment devices 17 fixed and supported by adjacent support frames 7, respectively. Supported. The two deflection adjustment devices 17 operate independently of the adjustment ram 8 for moving the support frame 7 mentioned above, ie independently of whether or not the adjustment ram 8 is activated. Further, the deflection adjustment device 17 is configured to apply a downward force to both ends 16 of the core body 11 at right angles to its long axis, as shown in FIG.

When a downward force is applied to the core body 11 by the deflection adjustment device 17, since the core body 11 is completely separated from the outer shell 10 except for the part where the support bearing 18 contacts, the deflection adjustment device 17 is driven. The force (pressing force) is
The driving force is transmitted to the outer shell 10 only through the core body 11 and one or more support bearings 18 fixed to the core body 11, and therefore the driving force is applied to a position closer to the center of the outer shell 10. . On the other hand, as described above, since both ends of the outer cover 10 are restrained by the support frame 7, the center part of the outer cover 10 is bent downward,
A curved state as shown in FIG. 2 can be created. Note that the amount of deflection of the outer cover 10 can be easily adjusted by changing the magnitude of the driving force of the deflection adjustment device 17.

In this way, it is possible to give a downward deflection to the outer cover 10, and the amount of deflection can be easily adjusted. By curving the cylinders 2 and 5 to fit the outer shape of the cylinders 2 and 5, it is possible to completely and uniformly abut the cylinders 2 and 5 over their entire lengths.

Note that the amount of deflection in the actual operating state is only about several millimeters. Further, when the outer cover 10 is bent downward, the core body 11 is slightly bent upward in the opposite direction to the outer cover 10 due to the reaction force.

When the deflection adjustment device 17 is activated, the outer cover 10 and the core 11 are deformed as described above, so that the core 11 is deformed as described above.
The size of the gap in the radial direction between It is set so that it does not rub against the solder jacket 10.

In this embodiment, the support bearing 18 provided inside the outer cover 10 is an optimal self-aligning rotor type bearing, so the core 11 can be bent without any resistance. This also has the advantage of smooth rotation even when bent.

As mentioned above, since the core body 11 only receives the force from the deflection adjustment device 17 and acts on the outer jacket body 10 supported by the support frame 7, the core body 11 has no outer jacket. It is also possible to provide only one support bearing 18 in the center of the body. However, in this embodiment, two support bearings 18 are arranged symmetrically and equally spaced from the center of the envelope 10. The spacing between the two support bearings 18 is equal to a distance of approximately 1/3 of the working length of the envelope 10.

Thus, the provision of two support bearings 18 on the core 11 has a further beneficial effect.
In the case where one support bearing 18 is provided in the center, if the two deflection adjustment devices 17 are not operated in step with each other, that is, in synchronization, each of the core bodies 11 supported by both deflection adjustment devices 17 must be operated in synchronization. There is a possibility that the amount of relative displacement differs between the end portion 16 and each end portion of the outer sheath 10 supported by the support frame 7, that is, each cylindrical body 12, and that the outer sheath 10 cannot be curved uniformly. However, this embodiment eliminates this fear, and as a result, two deflection adjustment devices 17
This eliminates the need to operate them synchronously.

Between the outer cover 10 and the core 11, there are 3
Backup tubes 20 are inserted. The two support bearings 18 have an inner side (center side of the core body) positioned by the end of the large diameter portion 19 at the center of the core body 11, and an outer side positioned by the inner side of the two back up tubes 20 on both the left and right sides. Positioned by the end. The outer ends of the left and right back up tubes 20 are in contact with and supported by the inner end of a cylindrical body 12 flanged to the end of the outer cover 10.
A central back up tube 20 is located between both support bearings 18.

A retaining ring 21 having a lip extending radially inward is attached to each end of the three back up tubes 20 adjacent to the support bearing 18. It is shaped like a sandwich. In this way, oil reservoir spaces 22 are formed on both sides of both support bearings 18 by the four retaining rings 21, and oil is stored in the spaces 22 to lubricate the support bearings 18.

Oil is supplied to the oil reservoir space 22 through a through hole 23 inside the core body 11 that extends in the longitudinal direction from each end 16 toward the center, and communicates with the through hole 23 inside the core body 11. It is carried out from each end 16 by a central oil supply through radial through holes 23.

The inner peripheral surface of the support bearing 18 is fixed to the core body 11 by a tight interference fit. In the core body 11,
In order to prevent the accumulation of dirt, rust, etc. due to corrosion, at least the portion where the support bearing 18 is fixed can be chromed so that the support bearing 18 can be pulled out when necessary. Although the outer circumferential surface of the support bearing 18 can be fixed to the inner surface of the outer cover 10 by interference fit in the same manner as the inner circumferential surface, in this embodiment, it is a slip fit.

The deflection adjustment device 17 that applies a downward force to the core body 11 is in the form of a threaded rod, and by rotating and moving the rod, the deflection adjustment device 17 applies a downward force to the core body 11.
It is also possible to apply force to the However, in this embodiment, two hydraulic ram devices are used, which is the optimum type. The hydraulic ram device constituting the deflection adjustment device 17 includes a ram casing 24 fixed to the support frame 7, a ram piston 26 provided in the ram casing 24 so as to be able to reciprocate, and one end connected to the ram piston 26. It consists of connected piston rods 25. The water pressure acting on the ram piston 26 can be adjusted as necessary by a valve (not shown). This water pressure is applied completely and uniformly over its entire length to the engraving cylinder 2, which is currently used in the printing press and has a deflected central part, due to the deflection of the jacket 10 due to the force generated by the hydraulic ram device. It is adjusted so that they are facing each other.

After adjusting the deflection of the jacket 10 of the pressure cylinder 5 to match the deflection of the engraving cylinder 2 used in the printing press, the ram piston 26
It is best to maintain the water pressure acting on the pipe at a constant value. Therefore, for this purpose, the ram piston 2
The pressure space in the ram casing 24 closed by 6 is hydraulically sealed or
It is connected to an automatic water pressure supply system that reliably maintains water pressure at a constant level even in the event of a water leak. Note that, of course, both of these may be used in combination.

The deflection adjustment device 17 or hydraulic ram acting on the core 11 operates independently of the adjustment ram 8 used for the movement of the support frame 7, so that it is not necessary to operate both rams synchronously. Therefore, once a force is applied to the core body 11 by the hydraulic ram constituting the deflection adjustment device 17, a predetermined drooping, that is, downward deflection is caused in the outer cover body 10, and then the hydraulic ram is locked, etc., to adjust to that state. If this is maintained, the set deflection state can be maintained even when the adjustment ram 8 is operated to move the support frame 7, that is, the pressure cylinder 5 up and down.

Therefore, even if the pressing cylinder 5, which was initially in contact with the etching cylinder 2, moves upward and away from the etching cylinder 2 while maintaining a horizontal state, the original deflection state of the outer cover 10 remains unchanged. Therefore, even when the pressing cylinder 5 again moves downward toward the etching cylinder 2 and comes into contact with it, a uniform line contact state can be immediately obtained.

In this way, both cylinders 2 and 5 are always in uniform line contact even when the engraving cylinder 2 is bent, so that one load is always applied in the width direction of the printing paper 4, and a part of the printing paper 4 is Concentrated loads no longer act.
Therefore, printing on the printing paper 4 is performed properly, and the printing paper 4 is not pulled and damaged even when the pressure cylinder 5 is brought into contact with the etching cylinder 2 or when it is separated from the engraving cylinder 2. There will be nothing to do.

The deflection adjustment device 17 or hydraulic ram can be flanged to the adjacent support frame 7. However, in this embodiment, the ram casing 24 of the hydraulic ram is constructed by forming a shoulder on the side of the adjacent support frame 7, thereby simplifying the mounting structure of the hydraulic ram on the support frame 7. ing. In this embodiment, since the ram casing 24 is firmly connected to the support frame 7 in this way, the core 11 whose end portion 16 is supported by the hydraulic ram is guided up and down within the ram casing 24. The advantage is that the ram piston 26 is guided by itself as it reciprocates. This also has the further advantageous effect that it becomes unnecessary to provide a separate guide member for the core 11.

The two piston rods 25, which are firmly connected to the ram piston 26, each have a core body 11.
An annular core holder 27 that holds one end 16 of the core 11 is attached, and the end 16 of the core 11 is attached via a self-aligning bearing 28 installed inside the core holder 27. is retained. Therefore, even when the core body 11 is bent, both ends 16 of the core body 11
However, it has the advantage that it can swing relative to the core holder 27 without generating internal stress.

Unlike the outer shell 10, the core body 11 does not rotate, so the self-aligning bearing 28 may be a simple bearing with a crown (medium height) and covered with some kind of bearing material with emergency actuation characteristics. A plain bearing can be used. However, by using a threaded bolt with a pivotable (oscillating) bearing or a self-aligning bearing on the head, the piston rod 25 can be directly connected to the end 1 of the core body 11.
It is also possible to connect to 6.

Second Embodiment FIGS. 4 and 5 show a second embodiment of the present invention, and the general structure of this second embodiment is similar to that shown in FIG. 3 in many respects. This is the same as the first embodiment. However, in the pressing cylinder 5 shown in FIG. 4, the ring-shaped or annular space 30 formed between the outer cover 10 and the core 11 is not completely filled with oil and is stored therein. The oil level when the pressure cylinder 5 is not rotating is indicated by 31. When the outer cover 10 rotates during operation of the printing press, the oil is uniformly distributed in a layer on the inner surface of the outer cover 10 due to centrifugal force, so that there is no imbalance caused by the oil that would adversely affect the rotation. Does not occur.

The oil storage ring-shaped space 30 between the outer cover 10 and the core 11 extends to the side of the support bearing 18, and the oil stored therein lubricates the support bearing 18. There is. Furthermore, the heat generated from the support bearing 18 during the rotation of the outer cover 10 is
The outer cover 1 is damaged by the oil that has come into contact with the support bearing 18.
0 and is evenly distributed and dissipated throughout the envelope 10. Therefore, the printing paper 4 being printed is heated by this heat, but in other words, the outer cover 1 is heated by the printing paper 4.
0 is being cooled. Therefore, uniform thermal expansion occurs in the outer cover 10, and the outer cover 10
The advantage arises that the temperature of the air does not rise excessively.

Note that transmission oil with low viscosity is optimal as the oil stored in the outer cover 10.

In order to ensure a problem-free oil supply to the support bearings 18, the annular oil storage space 30 is provided with at least one stripper 32 on the side of each support bearing 18. The stripper 32
The stripper 32 is held stationary even when the outer cover 10 rotates, and its radial length is such that the tip of the stripper 32 remains stationary even when the outer cover 10 rotates.
It is set so as to be in contact with the oil film formed on the inner surface.

The stripper 32 is a blade 34 made of a single metal plate that extends in a short range in the circumferential direction of the inner surface of the outer cover 10 and is arranged at an angle with respect to its long axis.
It can be easily formed. In that case, a part of the oil film (layer) formed on the inner surface of the outer cover 10 is peeled off by the blade 34 as the outer cover 10 rotates, and also by the blade 34. The apparatus is such that the oil to be redirected is pushed toward the nearest support bearing 18 along one of the two directions indicated by arrows 35a and 36a in FIG. It can be forcibly fed into the support bearing 18. For this purpose,
Metal plate blade 3 forming stripper 32
4, it is tilted at an acute angle with respect to the rotational direction of the outer cover 10, and the direction of the inclination is
The direction may be set such that the distance from the support bearing 18 decreases as the rotation direction progresses.

Since the stripper 32 does not rotate together with the outer cover 10, it is best to fix it to the core 11. In the embodiment shown in FIG. 4, the support bearing 18 is welded to a sleeve 33 that is fitted into the core body 11 and is used to hold the support bearing 18 in a predetermined position, thereby indirectly fixing it to the core body 11. . The fixed position of the stripper 32 is the lowest part of the sleeve 33. This sleeve 33 is keyed to the core body 11 by screws or pins 45, and in order to facilitate the assembly of the pressure cylinder 5, it is constructed from a plurality of parts rather than as an integral member.

In order to obtain the above-mentioned oil supply effect, the sleeve 33 is used for each of the 181 support bearings to be lubricated.
Experience has shown that it is sufficient to install one stripper 32 on the outside of the tube. However, it is easily possible to install two or more strippers 32, and in that case, each stripper 32 is preferably arranged at equal intervals in the circumferential direction of the core body 11.

In the embodiment shown in FIG.
2 are provided adjacent to two support bearings 18 which are arranged at equal distances from the center of the outer cover 10, and each stripper 32 is arranged at both ends of the outer cover 10. The self-aligning bearing 13 side that supports the section. That is, each stripper 32 is located on the center side (inside) of each support bearing 18.
Rather, it is placed outside. However, one or more strippers 32
Of course, it is also possible to arrange the support bearings 18 at the center of each support bearing 18.

The stripper 32 may consist of a bent metal plate having two blades 34 at right angles to each other, as shown in FIG. The two blades 34 are arranged so that the oil supply to the support bearing 18 is never stopped even if the direction of rotation of the jacket 10 is reversed.
are arranged at an angle with respect to each direction of rotation.
In this case, the oil supply action of each blade 34 is as follows:
The operation is exactly the same as that described above for the case where the stripper 32 is made of one metal plate.

In FIG. 5, the lower blade 34 disposed below the long axis of the core body 11 performs the above-mentioned oil supplying action when the outer cover body 10 rotates upward (in the direction of arrow 35). The upper superior blade 34 performs a similar action as the envelope 10 rotates downward (in the direction of arrow 36). The direction in which oil is pushed out when the outer cover 10 rotates in each rotational direction is indicated by arrows 35a and 36a indicating a direction perpendicular to each blade 34. That is, when the outer cover 10 rotates upward (in the direction of arrow 35), the oil is transferred by the lower blade 34 in the direction of arrow 35a, and when it rotates downward (in the direction of arrow 36), the oil is transferred to the lower blade 34. They are pushed out in the direction of the arrow 36a and supplied to each adjacent support bearing 18.

A two-blade stripper 32 as shown in FIG. 5 can be easily formed from an angle piece formed by cutting a structural angle member to a predetermined length with a 90° angle between the legs. in this case,
One end of the angle piece is installed on the outer surface of the core body 11 so that the long axis of the angle piece faces in the radial direction of the core body 11. In FIG. 5, the angle piece forming the two-blade stripper 32 is
It is directly fixed to the core body 11 by welding.

The end of the angle piece, that is, the L-shaped piece, fixed to the core 11 and the end close to the inner surface of the outer cover 10 both correspond to the curved outer surfaces of the core 11 and the outer cover 10. Because it is formed in an arc shape,
Both end surfaces of the angle piece are, so to speak, parallel to the outer surface of the core body 11 and the inner surface of the outer cover body 10.

As shown in FIG. 4, play is provided between the outer end surface of the stripper 32 and the inner surface of the outer cover 10, so that the core 11 and the outer cover 10 are curved to the maximum extent possible. Even in this case, the outer end surface of the stripper 32 is prevented from coming into contact with the inner surface of the outer cover 10. Experience has shown that the dimension of the play required in that case is on the order of 1 millimeter.

The angled pieces forming the two-blade stripper 32 are optimally installed with their corners facing the support bearings 18 adjacent to them. In this way, when the outer cover 10 rotates, the oil movement direction changing effect performed by one side of the blade 34 is performed by the outer surface of one leg of the angle piece forming the blade 34. Therefore, there is an advantage that the oil movement direction changing action performed by one blade 34 is not obstructed by the other blade 34.

Near the end of the outer shell 10, as shown in FIG. 4, an annular wall or lip 37 having an external gasket ring 38 around it is attached, and the outer peripheral edge of the annular wall 37 Oil is prevented from leaking between the inner surface of the outer cover 10 and the inner surface of the outer cover 10.
Thus, the outer end of the ring-shaped space 30 is defined by the annular wall 37 inside the cylindrical body 12. In the embodiment of FIG. 4, the annular wall 37
is fixed to the outer shell 10 by a ball 39 held in a pocket formed in the outer shell 10 and positioned by a screw.
Rotates together with the rotation of.

The annular wall body 37 is provided with a threaded hole 40 eccentric to its long axis, which is used for oil overflow. This overflow eccentric hole 40 passes through the annular wall 37 in its longitudinal direction, and can be closed by screwing a threaded plug 41 when not in use.

In order to supply oil to the inside of the ring-shaped space 30 , inside the core body 11 , the inner side of the annular wall body 37 extends horizontally from the end 16 of the core body 11 along its long axis. A central hole 43 that reaches up to the center hole 43 and a radial hole 42 that extends in the vertical direction and is connected to the central hole 43 at one end inside the core body 11 are provided. The sleeve 3 is fitted around the outer periphery of the core body 11
3 is provided with a notch 44 at a position that overlaps with the opening of the radial hole 42.
communicates with the ring-shaped space 30 through the notch 44. A female screw portion is formed at the outer end of the central hole 43, and a supply port of some kind of oil supply device is connected to the central hole 43. After oil is supplied, the female threaded portion is closed by screwing the male threaded plug.

When supplying oil, the outer cover 10 is appropriately rotated to place the overflow hole 40 at the lowest position as shown in FIG. 4, and the plug 41 is removed from the overflow hole 40. Then, when the oil supplied and stored in the ring-shaped space 30 exceeds the standard oil level 31, the excess oil is immediately discharged to the outside through the overflow hole 40, so that the amount of stored oil reaches the standard oil level. It cannot exceed 31. Further, since the level of the stored oil is considerably lower than the opening position of the radial hole 42 provided in the core body 11, there is no risk of the stored oil leaking from the radial hole 42, and therefore the opening of the radial hole 42 is plugged. There is no need to wear it.

Note that the oil stored in the ring-shaped space 30 can be used for a long period of time, so there is no need to periodically supply oil. However, it is necessary to replenish the oil from time to time to cope with the oil loss due to leakage, which is inevitable in any case. Further, it is optimal to provide the radial hole 42 opening into the ring-shaped space 30 near the end of the pressing cylinder 5, that is, the outer cover 10, so that the central hole 43 can be extended more than necessary in the longitudinal direction. This has the advantage that there is no need to make it longer.

The inner circumferential surface 46 of the annular wall 37 has a conical shape whose diameter increases toward the center of the pressing cylinder 5, and as a result, near the standard oil level 31,
A conical inclined surface facing toward the ring-shaped space 30 is formed. This conical inner circumferential surface 46 functions to automatically return oil that moves toward the annular wall 37 side into the annular space 30 during rotation. Also, a sleeve 33 for positioning the support bearing 18
A conical outer circumferential surface 47 whose diameter increases toward the center of the pressing cylinder 5 is formed at the end of the pressing cylinder 5, and the conical outer circumferential surface 47 is connected to the conical inner circumferential surface 4.
It faces 6 and a conical space. Both conical surfaces 46, 47 are parallel to each other.

Further, at the end of the annular wall body 37 opposite to the conical inner circumferential surface 46, a groove 48 that goes around the annular wall body 37 is provided.
is formed in the groove 48, and the core body 11 is formed in the groove 48.
The flange portion of the collar 49 attached to the end portion 16 of the collar 49 is fitted with a small gap. In this way, a labyrinth is formed between the collar 49 and the annular wall 37. This labyrinth communicates with the conical space between the two conical surfaces 46 and 47,
Both of them form an annular gap between the annular wall body 37 and the core body 11, and this annular gap allows the annular wall body 37 to
The sleeve 33 and the collar 49 and the core body 1
1 and is kept separate.

With this configuration, it is possible to prevent oil from leaking from both ends of the outer cover 10 without causing any hindrance to the rotation of the outer cover 10, that is, the annular wall 37.

In this embodiment, the end of the labyrinth is closed by a ring-shaped cover 50 attached to the collar 49 with its outer edge in contact with the outer surface of the annular wall 37. Therefore, even if oil enters the labyrinth for some reason, the movement of the oil is blocked by the ring-shaped cover 50, so that leakage of oil from the outer cover 10 is completely prevented. .

Here, it is optimal that the cover 50 is made of a thin spring plate material, which has the advantage that there is no fear that the cover 50 will interfere with the deflection of the core body 11 and the outer cover body 10. Naturally, it is important to freely obtain the necessary deflection when determining the amount of play between the outer peripheral edge of the core 11 and the annular wall 37 attached around it. be considered.

The oil stored in the ring-shaped space 30 is collected in the lower part of the ring-shaped space 30 as shown in FIG. 4 when the pressing cylinder 5, that is, the outer cover 10 is not rotating, and its surface is covered with standard oil. Since level 31 is reached, the oil only occupies part of the ring-shaped space 30. However, when the outer cover 10 rotates, the oil is uniformly distributed over the entire inner surface of the outer cover 10 due to centrifugal force, and a uniform oil layer (film) is formed on the inner surface of the outer cover 10. In the stripper 32, the tip of the blade 34 comes into contact with the oil layer and acts to strip the oil layer, and sends the oil to the adjacent support bearing 18, so that the support bearing 18 is automatically and reliably lubricated. That will happen.

Furthermore, at the same time as the lubrication, the oil removes heat from the support bearing 18, so that the oil and the support bearing 18 have almost the same temperature, but the oil can pass through the support bearing 18 and flow over the entire length of the pressing cylinder 5. Therefore, the heat taken away by the oil from the support bearing 18 is quickly transmitted to the entire envelope 10 and dissipated. Further, although the outer cover 10 expands due to this heat, this heat is quickly transmitted to the entire outer cover 10 and does not heat only a part of the outer cover 10, so that the outer cover 10 can expand uniformly.

Note that the blade 34 of the stripper 32
can also be curved instead of being flat as described above.

〔Effect of the invention〕

As is clear from the above explanation, this invention
It has the following excellent effects.

(a) The cylinder device of the first invention has an outer cover 1 of a pressing cylinder 5 which is an upper cylinder that moves up and down.
Both ends 16 of the core body 11 are supported by bearings fixed to the support frame 7, while both ends 16 of the core body 11 are provided inside the outer cover body 10 and separated therefrom.
is supported by a deflection adjustment device 17 provided on the support frame 7, and the deflection adjustment device 17 applies a downward force to the outer shell 10 via the support members such as the core body 11 and the support bearing 18. Since the structure is configured to add , it is possible to cause the central portion of the outer cover 10 to bend downward. Also,
By adjusting the force applied to the core body 11, the amount of deflection can be adjusted so that the outer cover body 10 uniformly comes into line contact with the etching cylinder 2, which is the lower cylinder.

As a result, even if the curved states of the lower cylinders such as the engraving cylinder 2 are different, it is possible to process the sheet material such as the printing paper 4 while always applying a uniform pressing force, and both cylinders 2, 5 can be operated under optimal conditions.

(b) Further, in the cylinder device of the first invention, the deflection adjustment device 17 is configured to
Since it is provided on the support frame 7 that supports the flexural adjustment device 17 and is movable together with the support frame 7 and can operate independently of the support frame 7, the magnitude of the force applied to the core body 11 by the deflection adjustment device 17 can be controlled. Just by changing the outer cover 10
Regardless of its position and whether or not it moves,
The amount of deflection of the outer cover 10 can be easily adjusted.

Further, by keeping the magnitude of the force of the deflection adjustment device 17 constant, the set deflection state of the outer cover 10 can be easily maintained even while the outer cover 10 is being moved. Therefore, when separating the outer cover 10, which has been set to an appropriate deflection state, from the etching cylinder 2, or when bringing the outer cover 10, which has been separated, back into contact with the etching cylinder 2, the entire length of the outer cover 10 is always bent. Since a uniform contact state is obtained, there is also the effect that there is no risk of damaging the sheet-like material such as the printing paper 4 held between the cylinders 2 and 5.

(c) The cylinder device of the second invention is the cylinder device of the first invention, in which the core body 1 constituting the cylinder
A ring-shaped space 30 for oil storage is provided between the ring-shaped space 1 and the outer cover 10, and the ring-shaped space 30
The oil inside can be moved in the longitudinal direction of the outer cover 10 through support members such as the support bearing 18, and the oil layer formed on the inner surface of the outer cover 10 when it rotates is forced onto the support member. Since the stripper 32 is provided, in addition to the above effects (a) and (b), the support member can be reliably lubricated and the heat generated from the support member can be effectively dissipated. .

As a result, even if the upper cylinder rotates in a bent state, the temperature rise outside the outer cover 10 due to the heat generated by the support member does not increase excessively, and furthermore, the thermal expansion of the outer cover 10 does not increase excessively. This has the effect of making it uniform and preventing the occurrence of thermal stress within the envelope 10.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing the arrangement of two cylinders of a typical gravure printing machine. FIG. 2 is an explanatory front view clearly showing the operating state of two cylinders of a general gravure printing press, and the degree of curvature is exaggerated to clarify the curved state of both cylinders. FIG. 3 is a cross-sectional explanatory view showing an embodiment in which the cylinder device of the present invention is applied to a press cylinder of a gravure printing machine. FIG. 4 is a partial sectional view of a press cylinder of a gravure printing machine, showing another embodiment in which the cylinder device of the present invention is applied to the press cylinder of a gravure printing machine. FIG. 5 is a partial explanatory view of a core equipped with a two-blade stripper. 2...Etching cylinder, 4...Printing paper, 5...
Pressing cylinder, 7... Support frame, 8... Adjustment ram, 10... Outer cover, 11... Core body, 12...
Cylindrical body, 13... Self-aligning bearing, 14... Bearing pocket, 15... Through hole of cylindrical body, 16... End of core body, 17... Deflection adjustment device, 18... Support bearing, 19...Large diameter portion of core body, 20...Back up tube, 21...Retaining ring, 22...Oil reservoir space, 23...Through hole for oil passage, 24...
...Ram casing, 25...Piston rod, 2
6... Ram piston, 27... Core body holder, 2
8... Self-aligning bearing, 30... Ring-shaped space for oil storage, 32... Stripper, 33... Sleeve, 34... Blade, 37... Annular wall, 4
0... Overflow hole, 41... Plug, 42...
... Radial hole, 43 ... Central hole, 44 ... Notch of sleeve, 46 ... Conical inner peripheral surface, 47 ... Conical outer peripheral surface, 48 ... Groove, 49 ... Collar, 50
……cover.

Claims (1)

[Claims] 1. Includes at least two cylinders that are arranged one above the other and configured to rotate in contact with each other, and the upper cylinder is movable up and down with respect to the lower cylinder. In sheet material processing machines such as gravure printing machines and intaglio printing machines, the center part of the upper cylinder is deflected downward in accordance with the amount of deflection of the rotating lower cylinder by bending the center part downward. A cylinder device for uniformly contacting a lower cylinder, which includes a support frame that is movable up and down, a cylinder that is rotatably supported by the support frame, and a cylinder that is installed on the support frame and applies force to the cylinder. In addition, the cylinder is provided with a deflection adjustment device that deflects the center portion thereof downward, and the cylinder has a cylindrical outer shell rotatably supported at both ends by bearings fixed to the support frame; a core body provided inside the outer cover coaxially and spaced apart from each other, and having both ends protruding from openings at both ends of the outer cover supported by the deflection adjustment device; at least one support member that is attached to the core body so as to be substantially symmetrical with respect to the center portion of the cover body and supports the outer cover body from the inside thereof; It moves with the support frame and operates independently of the movement of the support frame, and by applying a downward force to both ends of the core perpendicular to its long axis, the force is transferred to the support frame. A cylinder device characterized in that the cylinder device is configured to transmit the force to the outer jacket through a member, thereby causing a central portion of the outer jacket to bend downward. 2. The cylinder device according to claim 1, wherein both ends of the core are supported by the deflection adjustment device via self-aligning or pivot bearings. 3. The outer cover is configured with a cylindrical protrusion at both ends, and the end of the core protrudes from the outer cover through a through hole of the cylindrical protrusion, The cylinder device according to claim 1 or 2, wherein the outer cover is further supported by the support frame using the cylindrical protrusion. 4. The deflection adjustment device is composed of a ram device operated by pressure fluid, and the ram device includes a casing fixed to the support frame, a piston that reciprocates within the casing, and a ram device connected to the piston. 4. A cylinder device according to claim 1, further comprising a piston rod with a piston rod, and an end of said core body being connected to said piston rod. 5. A patent claim in which the support member that supports the outer cover inside thereof is constituted by two bearings arranged apart from each other, and the bearings are attached to the core body by an interference fit. Range 1st term ~
The cylinder device according to any one of Item 4. 6 The two bearings supporting the outer cover are arranged at a distance equal to approximately 1/3 of the length of the outer cover, and are self-aligning rotor type bearings. The cylinder device according to scope 5. 7. The cylinder device according to claim 5 or 6, wherein a portion of the core body where the bearing is arranged is chromed. 8. A gravure printing machine, an intaglio printing machine, which includes at least two cylinders arranged one above the other and configured to rotate in contact with each other, and in which the upper cylinder is movable up and down with respect to the lower cylinder. In sheet material processing machines such as machines, the central part of the upper cylinder is bent downward in accordance with the amount of deflection of the rotating lower cylinder, so that the upper cylinder is uniformly attached to the lower cylinder. A cylinder device for making contact, which includes a support frame that is movable up and down, a cylinder that is rotatably supported by the support frame, and a cylinder that is provided on the support frame and that applies force to the cylinder so that the center portion of the cylinder is moved. The cylinder includes a cylindrical outer shell rotatably supported at both ends by bearings fixed to the support frame, and an inner part of the outer shell. a core body provided coaxially with the core body and spaced apart from each other, and having both ends protruding from openings at both ends of the outer jacket body supported by the deflection adjustment device; and a central part of the outer jacket body. at least one support member that is attached to the core body in a substantially symmetrical manner and supports the outer cover body from the inside thereof, and the deflection adjustment device moves together with the support frame and supports the support member. It operates independently of the movement of the frame, and by applying a downward force to both ends of the core perpendicular to its long axis, the force is transferred to the outside through the support member. The oil is transmitted to the supporting member, thereby causing the central portion of the outer covering to bend downward, and furthermore, the oil stored between the core and the outer covering causes the support member to bend. A ring-shaped space for storing oil is formed so as to be able to pass through and move in the longitudinal direction of the outer cover, and a tip extending in the radial direction is formed within the ring-shaped space. at least one non-rotating stripper is provided adjacent to the inner surface of the envelope, the stripper comprising a blade arranged at an angle with respect to the direction of rotation of the envelope; , acts to strip off the oil stored in the ring-shaped space distributed like a film on the inner surface of the outer cover as the outer cover rotates, and sends the oil toward the support member. A cylinder device characterized by being configured as follows. 9. A patent in which the stripper includes two blades arranged at a predetermined angle so as not to be parallel to each other, and each blade is inclined in opposite directions with respect to the long axis of the core. A cylinder device according to claim 8. 10. The cylinder apparatus of claim 9, wherein the stripper is formed from a piece of structural angle, and the two legs of the angle piece serve as the blades. 11. Claim 9 or 1, wherein the two blades are arranged symmetrically with respect to the long axis of the core body, and the angle between the two blades is 90°.
The cylinder device according to item 0. 12 Claim 8, wherein the stripper is fixed directly or indirectly to the core body.
The cylinder device according to any one of items 1 to 11. 13 Both ends of the ring-shaped oil storage space are limited by an annular wall attached to the outer cover, and an annular space is provided between the annular wall and the core. Yes, the annular space is provided on the annular wall,
A cone formed between a conical inner circumferential surface whose diameter increases toward the center of the outer sheath and a similar conical outer circumferential surface provided on the core body opposite to the conical inner circumferential surface. Claims 8--
The cylinder device according to any one of Item 12. 14. The cylinder device according to claim 13, wherein the annular space includes a labyrinth. 15. The cylinder device according to claim 14, wherein the outer end of the annular space is covered with a cover made of a spring material. 16. According to any one of claims 13 to 15, wherein the annular wall has an overflow hole for controlling the level of oil stored in the oil storage ring-shaped space. cylinder device. 17. The cylinder device according to claim 16, wherein the overflow hole can be closed with a plug.