SE508541C2 - Empty sleeve storage device for a wheelchair of a paper machine - Google Patents

Abstract

A storage arrangement (1) for empty cores (2) for a reel-up (3) in which paper is wound to form reels of paper (4), said storage arrangement (1) having a stand (16) comprising a feed-out ramp (14) and a container (18) with a top (38), a bottom (39) and four vertical sides consisting of a front side (20) facing the feed-out ramp (14), a rear side (21) and two sides (22, 23), said four sides (20, 21, 22, 23) between them defining a space for empty cores (2), which container (18) also comprises an upper inlet opening (24) and a lower outlet opening (25) in conjunction with the upstream end of the feed-out ramp (14). According to the invention a plurality of downwardly inclined planes (26) are arranged one beneath the other inside the container (18), directed alternately from the front side (20) and the rear side (21), each plane (26) having a downstream end located at a predetermined distance from the adjacent rear side (21) or front side (20) to provide an opening therebetween so that each empty core (2) rolling down an upstream plane (26) continues freely to the next plane (26) in a continuous path from the inlet opening (24) to the outlet opening (25). The stand (16) also includes a stand table (17), at which the container (18) is exchangeably arranged in conjunction with the feed-out ramp (14) to enable transport of the container (18) to a filling station.

Description

15 20 25 30 35 508 541 At the beginning of the winding, the paper web is fixed to the sleeve, usually by means of, for example, an adhesive or tape string. In order to achieve a coherent production of paper rolls, new winding rollers with empty sleeves from some type of rolling stock, also called roll spindle magazine, are constantly being added. This roller storage is advantageously arranged in a close connection to the support cylinder at the upstream end of the wheelchair and then suitably at a level just above the wheelchair's production line in order to save space. The rolling stock must then be replenished continuously as the winding rollers with the applied sleeves are used by the wheelchair. This is done partly by pulling the winding rollers or pushing them out of the sleeves of the finished paper rolls in a return station by means of a shear member, in the form of, for example, a pull-out device in a spindle pull-out station, and then re-inserted into a new empty sleeve in the manner described below. Due to the awkwardness of the paper roll, the shear means is usually arranged immediately downstream and directly next to the drive side of the wheel handling part of the wheelchair, i.e. on the sleeve feed side, of the wheel handling part of the wheelchair, so that the return can be done by a finished device. transport device, for example an axle sled or a transport path, and thus transported to the next workstation, usually some type of conversion plant. In this plant, the cardboard sleeves are also recycled from the paper rolls, which sleeves are placed in an intermediate layer constituting some form of transport container, so that even those as return sleeves are thus reused in the production of paper rolls. From this intermediate storage the said return sleeves are then conveyed, manually or with a work vehicle, to a storage device for empty sleeves where the sleeves are either emptied directly onto the storage device's discharge ramp from the transport container or further down into some form of substantially vertical storage vessel for sleeve sleeves. the upstream end of the discharge ramp 10 15 20 25 30 35 508 541. The storage device for new empty sleeves is generally placed at the end of the wheelchair's production line adjacent to the above-mentioned return station, so that this storage device thus becomes easily accessible for the above-mentioned work vehicle. At the downstream end of the supply ramp of the storage device, the empty sleeves are fed one by one to a width corresponding to the width of the paper web to a lifting table arranged between the respective frame parts of the wheelchair, after which the last extended roll-up roller is reinserted into the fed empty sleeve. to thus again form a winding roller ready for winding. Thereafter, the finished winding roll is moved to the above-described roll betrayal so that the process can begin again and thus continue continuously.

In other types of plants for winding material webs, mainly for winding on shorter sleeves of smaller dimensions, which can be handled in a much simpler way, it is previously known to arrange a special workstation where new empty sleeves together with return sleeves are mounted to winding rollers. Return sleeves that are damaged during the handling process are first repaired in a splicing device belonging to the plant, where damaged parts of the sleeves are cut off and the remaining pieces are joined together into new complete sleeves.

However, for empty sleeves intended for the very heavy and awkward paper rolls produced in a paper wheelchair, such handling works poorly due to the much larger dimension and weight of the sleeves. To facilitate the handling of these sleeves, which cannot be easily fed manually, a work vehicle or other work tool is required. A major problem then becomes how this work vehicle should be able to move a larger number of return sleeves without these being damaged. 10 15 20 25 30 35 508 541 When filling the sleeve or container of the sleeve stock, damage can occur to the cardboard sleeves, for example in the form of dents, torn ends, etc., which then risk becoming unusable. Should such a damaged sleeve not be detected, the direct consequence could be that a relatively very costly stop in production could occur, since in the worst case the wheelchair must be stopped in order for the broken sleeve to be removed.

To avoid this, each sleeve must be carefully inspected, which is laborious. The sleeves can also become pinched in the sleeve stocks used so far, where the sleeves are loosely stacked on top of each other in a complicated tangle, by ending up obliquely and thus getting stuck either in the container itself or in the transfer to the discharge ramp through the container outlet. In addition, in all known storage devices for empty sleeves where some form of container is used, this of forcing shell is in some way funnel-shaped so that the sleeves can be discharged through the outlet opening of the container one by one, so that said container takes up an unnecessarily large volume in in relation to the number of sleeves stored in the container. A rectangular magazine, which could contain many more sleeves in relation to its height and volume, can not be used today for the reasons mentioned above.

In addition, in the case of the sleeve containers used so far, the truck driver must manually empty the empty sleeves out of the transport container down onto the discharge ramp or down into the above-mentioned vertical vertical storage device belonging to the storage device mentioned above. To carry out this cumbersome work, the driver has to get off the truck in order to be able to activate the control unit to the container's outlet hatch only afterwards. Due to the problem described above with empty sleeves which have accidentally ended up in the container and thus jammed, it is required that the driver at each delivery also carefully checks the inside of the container and the position of the empty sleeves contained therein before the outlet door actuator activated.

An example of the older technology described above is the conversion plant shown in the Swedish patent specification SE-C-196 384, which plant, however, is only applicable to a rewinding machine where the paper rolls coming from the wheelchair are rolled into the ones in the said publication. described much thinner cardboard cores used for e.g. kitchen paper rolls or toilet paper rolls. The storage device shown in this document can not be used for the considerably larger cardboard sleeves used in cylinder wheelchairs, which produce paper rolls with a diameter and length up to several meters and with sleeves that can not be moved in any large quantity manually but therefore must be transported by means of a work vehicle.

However, the construction shown in the said publication clearly illustrates the problems caused by loosely lying sleeves in a funnel-shaped magazine. On the one hand, this construction must contain a shaking device in order to prevent the immediate formation of the sleeves, and on the other hand, the consequence of a funnel having to be used instead of a rectangular leather-shaped container is that an extremely large unused internal volume is obtained.

A further example of old technology is a conversion plant described in U.S. Pat. No. 4,716,646, in which smaller winding rollers are assembled and placed directly resting on top of each other in a stack in an intermediate layer constituting a small, wheelable transportable container, from which the finished roll-up rollers are then picked in a manner not further described, but probably by hand. The object of the present invention is to provide an improved and simplified storage device for empty sleeves intended for use in a wheelchair of a paper machine, in which paper is wound on said empty sleeves to form paper rolls, where the filling and the discharge of empty sleeves from the storage device is substantially improved.

A second object of the invention is to provide a storage device which is self-emptying.

A third object of the invention is to provide a storage device with a magazine which ensures the discharge of the individual empty sleeves without risking being damaged, pinched or completely stuck during said discharge in the magazine itself or during the transfer to the discharge ramp.

Another object of the invention is to provide a storage device which enables a better ratio between the volume, height and maximum number of empty sleeves stored in the container.

A further object of the invention is to provide a storage device with an empty sleeve magazine which allows the contents to be inspected and checked from its outside.

Finally, it is also an object of the invention to provide a storage device with a magazine which can be easily transported from the filling station to the storage device for empty sleeves by means of a truck and in such a way that the driver's visibility during transport is facilitated. The device according to the invention is characterized in that a plurality of downwardly inclined planes are arranged below each other in the space of the container and are alternately directed from the front and back of the container, each plane having a downstream end which is located at a predetermined distance from the adjacent rear and front faces, respectively, to form an opening therebetween so that each empty sleeve rolling down an upstream plane continues freely down to the next plane in a continuous path of movement of the empty sleeves from the inlet opening to the outlet opening, and said position also includes a rack table, to which the container is arranged in connection with the dispensing ramp in a replaceable manner to enable a transport of the container to a filling station.

With the present invention, the advantage is thus achieved that the driver of a truck, for example a boom or forklift, can without major obstacles see straight through the magazine container from at least two of its outer sides and in this way can see where he is driving. This is done by constructing the empty sleeve magazine in a manner described below so that it becomes at least partially transparent, whereby an additional advantage is obtained since the empty sleeves can then be easily inspected.

The invention is explained in more detail below with reference to the drawings.

Figure 1 is a schematic perspective view of a storage device for empty sleeves according to the invention seen from one long side of the storage device, the drive side, comprising a replaceable magazine basket placed on top of a rack table and with a discharge ramp with an empty sleeve bearing downstream of the rack table.

Figure 2 is a side view of the storage device according to Figure 1 showing the drive side. Figure 3 is a side view of a part of a prior art storage device showing a roll handling part connecting to the storage device belonging to a wheelchair seen from one long side thereof and a unrolling station for the finished paper rolls located at the wheelchair.

Figure 4 is an end view of the storage device according to Figure 1 seen from the upstream end of the storage device.

Figure 5 is a view of the storage device according to Figure 1 seen from above.

Figure 6 is an end view of the storage device of Figure 1 as viewed from the downstream end of the storage device.

Figure 7 is a perspective view of an opening device of the magazine basket of the storage device according to Figure 1, the opening device shown being in its inoperative position with its actuator in an extended position.

Figure 8 is a detail view of the opening device according to Figure 7 seen from the front.

Figure 9 is a detail view of the opening device according to Figure 7 seen from the side.

Figure 10 is a perspective view of the opening device according to Figure 7, but showing the opening device in its operative position with its actuator in a retracted position.

Figure 11 is a detail view of the opening device according to Figure 10 seen from the front.

Figure 12 is a detail view of the opening device according to Figure 10 seen from the side. 10 13 20 25 30 35 508 541 Figure 13 is a schematic perspective view of the storage device according to Figure 1 showing an alternative embodiment of the replaceable magazine basket comprising spacer discs and an alternative singular opening device.

Figure 14 is a schematic perspective view of the rack table of the storage device according to Figure 1 showing control means for fitting the magazine basket thereon.

Figure 15 is a side view of the storage device according to Figure 1 showing an alternative embodiment of the discharge ramp, where said ramp connects to the container at the level of its outlet opening.

Figures 1 and 2 show diagrammatically in perspective view and side view, respectively, a storage device 1 for dimensionally stable cylindrical empty sleeves 2 intended for use in a wheelchair 3, see Figure 3, of a paper machine in which paper is manufactured in a continuous paper web. In the wheelchair 3, paper rolls 4 are continuously wound on a frame comprising a winding roller 5 and a core mounted thereon in the form of the above-mentioned dimensionally stable cylindrical empty sleeve 2.

The wheelchair 3 comprises a rack member 6 with first and second identical, elongate, parallel rack parts 7, 8, on which the finished paper rolls 4 roll along one on each rack part, 7 resp. 8, arranged rail 9. At the downstream end of the wheelchair 3, a roll handling part 10 takes over the finished paper rolls 4 for further transport to some form of transport device (not shown), for example a transport carriage or conveyor, which receives the paper roll 4 and forwards it to a warehouse or conversion facility (not shown). 10 15 20 25 30 35 508 541 10 For the wheelchair 3 shown in figure 3, a rolling stock (not shown) is arranged upstream thereof and above the frame member 6 containing winding rollers 5 with empty sleeves 2 applied thereto. From this rolling stock new winding rollers 5 are lifted down by means of of closure arms (not shown) to said wheelchair 3 where the winding process of paper web to the finished paper roll 4 then begins.

The said roll stock is filled with new winding rollers 5 by means not shown arranged upstream of the said roll stock.

The finished paper rolls 4 are tipped over to the transport device, after which a new empty sleeve 2 rolls down from a discharge ramp 14 belonging to said storage device 1 to a lifting table 13, whereupon, after a sufficient number of sleeves 2 to achieve the required web width of the paper web rewinding roller 5, is again transported to the said rolling stock in a manner not shown. On said discharge ramp 14, an empty sleeve bearing 15 is located between two lengths of guide plates 29 arranged next to each long side of the ramp 14, which discharge ramp 14 is given a required inclination to obtain an automatic and continuous rolling down of the empty sleeves 2, one after the other in succession. , along the inclined plane of the ramp 14 under which the lowest empty sleeve 2 thus rolls over to the lifting table 13 in the manner described below.

Also in the discharge ramp 14, in the embodiment shown, one or more flat irons 28 are arranged (see Figure 1), extending from the upstream end of the ramp 14 to its downstream end, in order to effectively prevent the empty sleeves 2 from being obstructed on the ramp 14. located rubbish. At the downstream end of the discharge ramp 14 there is a separating device 30 rotatable or rotatable about an axis, see figure 2, which can be designed as one, or more, elements 35 rotatable about said axis by means of operating means 34. , comprising one or more projections 31, for example as spokes, against or between which each empty sleeve 2 located at the bottom of the feed direction of the ramp rests in order to obtain a rolling downstream movement after or during the rotation or rotation of the element 35. By means of this separating device 30 it is achieved in such a way that at the same time as the lower empty sleeve 2 rolls over to the lifting table 13, the subsequent empty sleeve 2 is retained by one or some of the said projections 31.

In the transverse direction of the ramp 14 above said separating device 30, a boom 32 is arranged, comprising an upper holding device 33, e.g. a plate, acting as a stopping means for partly preventing the lower empty sleeve 2 from rolling over the obstructing element 35, and partly preventing all similar climbing of the subsequent empty sleeves 2, so that said holding device 33, together with said separating device 30, effectively regulates the discharge of each individual empty sleeve 2 and thus prevents the sleeves 2 from being fed more than one at a time during feeding.

Without being shown or described in more detail, the storage device 1 comprises control and regulating equipment of, for example, pneumatic or electrical design, including necessary sensors of some common type, at the inlet and outlet openings located in the storage device 1, e.g. at the inlet and outlet of the discharge ramp 14, respectively.

The storage device 1 further comprises a stand 16 consisting of three parts, namely the said discharge ramp 14, a stand table 17, see figure 14, and a container 18 for filling new empty sleeves 2. This movable and replaceable container 18 is formed by, in the preferred embodiment shown, a rectangular drawer-shaped open magazine basket 18. The term open here means that the contents can be inspected from the outside of the container 18, which then e.g. may be, as in the embodiment shown, composed of a truss of horizontal, vertical and diagonal connecting elements, struts or rods 19, preferably of metal, or consist of a net or of a grid construction of preferably steel so that one can freely see through said container 18.

The magazine basket 18 comprises two suitably horizontal sides consisting of an upper side 38 and a lower side 39, partly four pairs of opposite and preferably vertical sides, constituting partly a front side 20 facing the discharge ramp 14 and a rear side 21 facing away from the said the ramp 14, and two mutually parallel end sides 22, 23 in the discharge direction of the ramp 14, which sides form between them an open space for the empty sleeves 2 which container 18 also comprises, suitably in its upper side 38 and lower side 39 respectively, an upper inlet opening 24 and a lower outlet opening Which later opening 25 adjoins the upstream end of the discharge ramp 14.

The magazine basket 18 further comprises a plurality of level-forming one after the other and below each other arranged downwardly inclined planes 26, arranged in the said open space of the container 18, in a zigzag pattern seen from the end sides 22, 23 in a manner described in more detail below, suitably constructed of flat sheets of sheet metal, metal mesh, bars or bars.

The mentioned planes 26 start from the respective front or rear side 21 of the magazine basket 18 where they are fixedly arranged in a suitable manner, e.g. with a welded joint or any other suitable connection such as screw or rivet joints.

The inclined planes 26 extend over the open space of the magazine basket 18 10 15 20 25 30 35 508 541 13 in a downward direction which alternately varies either towards said front side 20 or rear side 21 of the container 18. Furthermore, the downstream end of the alternately inclined planes 26 terminates a short distance from each facing inner side of the container 18. Said short distance forms an opening 27 between the downstream end of the plane 26 and the inner wall of the container 18. The empty sleeves 2 rolling horizontally and parallel in the magazine basket 18 execute said plane so as to fall freely down to the level of the next inclined plane 26 through the above-described plane 26 through the above-described inclined plane 26 which has been designed slightly larger than the diameter dimensions of the empty sleeves 2. This diameter measurement can for this type of empty sleeves 2, intended for paper rolls 4, amount to a considerable 40-50 cm.

An alternative embodiment of the replaceable magazine basket 18 is shown in Figure 13 comprising spacer plates 47 arranged on each plane 26 along one or both end sides 22, 23 so that the passage-free distance between said end sides 22, 23 can be adapted to fixed length of the empty sleeves. Said spacer plates 47 are preferably made of a plate which is bent into a suitable shape, for example as in the embodiment shown U-shaped, so that said plate provides a ridge or an edge along which the empty sleeves 2 can roll.

By means of the construction described above, see Figures 2 and 13, said empty sleeves 2 obtain a rolling movement whose vertical direction is constantly directed downwards while its horizontal movement alternately changes direction 180 ° between each plane 26 included in the container 18.

At the outlet opening 25 of the container 18 towards the discharge ramp 14, one or more opening means 42 are arranged (see Fig. 6 and Fig. 13, respectively), which comprise partly a closing member 437 - such as a gate, lid or door pivotally or slidably arranged by suitable storage means or As in the embodiments shown, a respective two locking means 44 arranged in front of the outlet opening 25, and on the other hand an actuator 45 of said closing member 43, preferably arranged vertically. This actuator 45 can suitably be constituted by a cylinder 46, in the preferred embodiment of a pneumatic cylinder 46, since the use of such does not risk leakage of hydraulic oil on the empty sleeves 2. Figure 13 also shows a vertically displaceable closing member 43, inside comprising only one actuator 45, which member 43 in the embodiment shown is designed as a plate curved at its lower end and running with its respective vertical edges in each vertical guide rail. When using only one actuator 45, there is no need for synchronization to other actuators 45.

The said opening device 42 of the container 18 is designed as follows so that the container 18 automatically becomes self-emptying on the new empty sleeves 2 when it is placed right on the rack table 17. By arranging such an automatic opening device 42, the number of working steps for the truck driver who no longer has to get off the truck to manually empty the sleeve container 18, which substantially simplifies the handling when filling new empty sleeves 2. To achieve said self-emptying, connectors 40 are arranged at the stand 16 comprising a number of guide means 41 and coupling devices for the closing members 43 of the container 18 so that the container 18 can be easily mounted to the rack table 17 by means of, for example, the boom truck and, partly when the container 18 is fitted to the rack table 17 by means of the said guide means 41, see figure 14, connected to the compressed air valve of the coupling device (not shown) so that when the magazine basket 18 so When the above-mentioned cylinders 46 of the closing means 43 are activated in the correct place, the empty sleeves 2 can be rolled out through the outlet opening 25 down on the discharge ramp 14.

The function of the storage device 1 is briefly as follows. The magazine basket 18, which is filled with new empty sleeves 2 lying horizontally, parallel and in succession alternately in a zigzag in a feeding direction at either long side of the container 18 itself, on the inclined and below-arranged planes 26 arrives at the storage device 1 from a conversion plant not shown above where the sleeves 2 have been recovered from the paper rolls 4 by means of a crane or a work vehicle, e.g. a boom truck or forklift, and is raised to a level at the upper surface of the stand 16 itself by means of lifting eyes 36 and fork pockets 37, respectively, mounted on the upper surface 38 and bottom side 39 of the magazine basket 18 and then fitted to the rack table 17 and the connectors 40 suitably arranged thereon to when the magazine basket 18 has ended up in the correct position, it is lowered and possibly locked automatically to the rack table 17 with a locking device (not shown) on the said stand 16.

At the same time, compressed air valves are connected, by a mechanical device, a sensor or another suitable device, not shown, belonging to said connecting device sensing that a correct position has been assumed, whereupon the opening device 42 is activated to the container 43 gate 43. The empty sleeves 2 can then roll down the inclined the plane 26 out of the container 18 through the outlet opening 25 in a sequence one by one down on the discharge ramp 14 of the scaffold 16.

The container 18 described above can also, in other embodiments not shown, be thought to be funnel- or trough-shaped with at least one of the front or rear sides 21, but also with both sides 20, 21, vertically inclined inwards or outwards on such a cross-sectional area is formed between them which decreases downwards in the outlet direction of at least a part of the height of the magazine basket 18. In a further embodiment of the present invention, any, some or all of the above-mentioned front or back sides 21 including the inclined planes 26 may be curved to at least a part of the extent of their plane.

Claims (10)

10 15 20 25 30 35 508 .541 17 P A T E N T K R A V Storage device (1) for empty sleeves (2) for a wheelchair (3) of a paper machine, on which paper is produced in a continuous web, which is rolled up in the wheelchair (3) on said empty sleeves (2) for forming paper rolls (4), which storage device (1) comprises a stand (16), which in turn comprises an empty sleeve container (18) and a discharge ramp (14) for said empty sleeves (2) from the container (18) , which has an upper side (38), a lower side (39) and four, preferably vertical, pairwise opposite sides consisting of a front side (20), facing the discharge ramp (14), a rear side (21), facing away from said ramp (14), and two mutually parallel end sides (22, 23) arranged in the feed direction of the ramp (14), which four sides (20, 21, 22, 23) delimit between them a space for empty sleeves (2), which container ( 18) also comprises an upper inlet opening (24) and a lower outlet opening (25), which connects to the upstream end of the discharge ramp (14), that a A plurality of downwardly sloping planes (26) are arranged below each other in the space (18) of the container (18) and are alternately directed from the front (20) and back (21) of the container (18), each plane (26) having a downstream end which is located at a predetermined distance from the adjacent rear side (21) and the front side (20), respectively, to form an opening therebetween so that each empty sleeve (2) rolling down an upstream plane (26) continues freely down to the next plane (26) in a continuous path of movement of the empty sleeves (2) from the inlet opening (24) to the outlet opening (25), and that said stand (16) also comprises a rack table (17), to which the container (18) is arranged in connection with the discharge ramp ( 14) in a replaceable manner to enable a transport of the container (18) to a filling station. 10 15 20 25 30 35 508 541 18 2.. Storage device according to claim 1, characterized in that it comprises one or more opening means (42), which are arranged (-de) to close the outlet opening (25) of the empty sleeve container (18), and a connecting means (40), which is arranged to make opening means. -en) (42) self-emptying on empty sleeves (2) after fitting the container (18) to the stand (16). 3.. Storage device according to claim 1, characterized in that the downwardly inclined planes (26) are constructed of thin sheet metal, metal mesh, bars or grids. Storage device according to claim 2, characterized in that said opening means (42) comprises some kind of closing means (43) such as a gate, lid or hatch or only one or more locking means (44), which lock (s) block the outlet opening (25) . Storage device according to claim 4, characterized in that said locking device (44) is constituted by an actuating device (45) such as a pneumatic or hydraulic cylinder (46). A storage device according to claim 4, characterized in that said opening means (42) comprises a mechanical or electrical actuator. Storage device according to claim 1, characterized in that said inclined plane (26) is arranged in a zigzag configuration so that said empty sleeves (2) have a rolling movement, the vertical direction of which is constantly directed downwards, while its horizontal movement alternately changes direction 180 ° between each plane (26) included in the container (18). Storage device according to claim 1, characterized in that the perpendicular distance between two adjacent planes (26) is at least slightly larger than the diameter of the similar empty sleeves (2) used for a determined travel of the wheelchair (3), and at most slightly less than twice the diameter of the empty sleeves. Storage device according to claim 8, characterized in that adjusting means are arranged on the container (18) so that said perpendicular distance can be adapted to a predetermined size according to the diameter measure of the uniform empty sleeves (2) currently to be stored in the container ( 18) has. Storage device according to claim 1, characterized in that the container (18) comprises spacer plates (47) for regulating the clearance of passage between the two end sides (22, 23), which spacer plates (47) are arranged adjacent to either or both end sides. (22 or 23) on each plane (26) contained in the container (18).