Winding – tensioning – or guiding – Convolute winding of material – With particular drive
Reexamination Certificate
1999-05-07
2001-02-13
Jillions, John M. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
With particular drive
Reexamination Certificate
active
06186437
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method for applying a load to a reel.
The present invention also relates to a device for applying a load to a reel. In particular, the invention relates to the load of a machine reel in reel-ups of a paper web.
BACKGROUND OF THE INVENTION
In the final section of a paper machine or a corresponding machine which produces a continuous paper or fibrous web, the paper web passed from the preceding sections is accumulated into a machine reel in the reel-up. Such a reel is formed around a reel spool, which is loaded against a reeling cylinder by means of which the paper web is guided onto the reel. At least the reeling cylinder is driven, wherein it can simultaneously rotate a freely rotating reel, or the reel can be center-driven, i.e., the reel spool is driven during the reeling.
In a normal work cycle of a continuous reeling of a paper web, the reel is changed by cutting the paper web and arranging its end around a new, empty reel spool, the old full reel is removed from the reel-up and transferred to further processing, and the paper web is reeled around the new reel spool into a full-size machine reel. This process is repeated as often as necessary.
One factor that affects the quality of the thus-produced machine reel is the force which is used to load the reel against the reeling cylinder during the reeling process, and during the loading this force is changed on the basis of certain parameters or by using a suitable program. The loading force is produced by means of a force device, typically a hydraulic cylinder, coupled to the reel spool via a suitable mechanism. This hydraulic cylinder can be coupled for example to pivotal arms connected pivotally to the frame of the reel-up. This coupling method is described for example in Finnish Patent Nos. 71107 and 98506 and in U.S. Pat. No. 5,251,835, in all of which the reel spool is at the same time supported by horizontal reeling rails. For example, in U.S. Pat. No. 5,251,835, the full reel is transferred along the reeling rails into a discharge position, and a new reel spool is simultaneously brought onto the reeling rails.
In U.S. Pat. No. 5,285,979, the load is effected by means of a carriage which moves in the frame of a reel-up along linear guides, to which carriage a loading hydraulic cylinder is coupled. The reel spool is arranged on a pivotal arm connected pivotally to the carriage. The arm is used only when removing the full reel by turning the pivotal arms into the unloading direction with special unloading cylinders.
In all the above-described known reel-ups, the aforementioned force device is used to take care of both the desired loading force and the transfer of the reel spool further from the reeling cylinder when the size of the reel is increased.
The aforementioned solutions require a substantial motion length of the force device effecting the motion and the force. The actual loading force is affected by a number of factors, such as the friction produced by the motion of the force device, and in addition to that the dynamic friction of the structure supporting the reel spool, during the movement of the reel spool.
European Patent No. 0 604 558, corresponding to U.S. Pat. No. 5,393,008, describes carriages arranged to move linearly on guides disposed parallel to the reeling rails, the position of the carriages being determined by means of hydraulic cylinders coupled between the frame of the reel-up and the carriages. The carriages are provided with press devices, which press the bearing housings located at the ends of the reel spool and resting on the reeling rails, towards the reeling cylinder by an adjustable force. On the other side of the bearing housing, the carriages are also provided with positioning devices by means of which it is possible to adjust the position of the reel spool in the carriages more precisely.
OBJECTS AND SUMMARY OF THE INVENTION
Accordingly, an object of the invention is to provide a method and device for applying a load to a reel in a reel-up in which the reel is loaded against the reeling cylinder from the carriages themselves, which in turn, can be moved in another way with a transfer device separate from the force device applying the load. The nip force effective in the nip between the reeling cylinder and the reel is determined according to the function of the force devices (press devices) placed in the carriages, and in the operation of the load system, the possibilities of minimizing the friction factors which disturb the load are even better than before.
Another object of the invention is to present a new method in the reeling of a web as well as a reel-up in which the transfer of the reel spool and the load on the reel are differentiated even more than before and in which it is possible to utilize various solutions of machine automation.
In order to achieve these objects and others, the transfer motion of the reel spool is implemented with a mechanical positioning device, e.g., by means of a worm drive and/or a movable carriage which at least partly supports the weight of the reel spool and the reel. The actuators transmit the transfer force by means of mechanical power transmission to the structure moving the reel spool, and enable accurate positioning without requiring a pressurized medium, such as hydraulic oil, and without hydraulic cylinders of a long stroke length. On the other hand, when a carriage is used as a structure which moves in accordance with the growth of the reel and contains its own loading devices, the carriage receiving the weight of the reel spool and the growing reel, it is possible to abandon the stationary reeling rails. By means of the carriage supporting the reel, it is also possible to remove the reel from the reel-up for further processing.
As for the other preferred embodiments of the invention, reference is made to the description to follow. According to a preferred embodiment of the invention in particular, the carriage can also be utilized for transferring a full reel away from the reel-up, in other words, it can be used as a transport carriage for the machine reel.
Still another object of the invention is also to present a device for applying a load to a machine reel, the device being easier to control and being applicable to the reeling process with minor disturbance factors. To attain this object, the transfer device of the reel spool/reel which is separate from the force device, is a mechanical positioning device which can be selected and optimized on the basis of the required transfer length and other features, and/or the reel spool/reel is arranged on the support of a movable carriage.
As for the other preferred embodiments of the device, reference is made to the following description. In particular, mention is made of the possibility to arrange the structure of the carriage supporting the reel in such a way that in addition to the transfer in the machine direction during the reeling process, the carriage can be used for transferring a full machine reel completely away from the reel-up and for moving it outside the reel-up. To implement this, the carriage is equipped with wheels which are not dependent on the rails possibly running in the machine direction, i.e., in the incoming direction of the paper web. Such carriages can be equipped for example with turning wheels and with two separate sets of wheels, wherein the carriage can be removed in the reel-up in a direction different from the machine direction, for example transverse to the machine direction. It is also possible to use other conveying means on the support of which the carriage can be transferred in the machine direction and possibly completely removed from the reel-up. Such a carriage can be constructed in such a way that its structure closely resembles that of an automatic guided vehicle used for the transfer of goods.
REFERENCES:
patent: 3834642 (1974-09-01), Kampf
patent: 4049212 (1977-09-01), Yamaguchi et al.
patent: 4744526 (1988-05-01), Kremar
patent: 5251835 (1993-10-01), Kyytsönen
patent: 5285979 (1994-02-01
Rantanen Jouni
Ruha Pekka
Suoniemi Sakari
Jillions John M.
Steinberg & Raskin, P.C.
Valmet Corporation
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