Patent Application
20100320308
The present invention relates to a winding machine that winds various webs, and in particular to a winding machine that does not require the use of a turret lathe and that is configured to be capable of changing a shaft by eliminating a loss in a web or the like during a shaft change.
A web or the like fed from a process in which the web is manufactured (pre-process) is wound around a roll core by a winding machine, and when a predetermined length is wound, the finished roll core is changed to the next new roll core. Here, with a conventional technique, usually, the fully wound winding shaft and the new roll core are installed in a two-shaft turret lathe or a multi-shaft turret lathe, and the turret lathe is rotated each time there is a changed to a new roll core. When the fully wound winding shaft comes to a removal position and the new roll core comes to a winding position, a cutting blade is moved down to cut the web running between the winding shaft and the new roll core, then, the cut-off end of the running web is wound around the new roll core and a fully wound roll formed around the fully wound winding shaft is removed.
However, in the case of winding in which a shaft change is performed using such a turret lathe, because the size of the turret lathe is determined by the distance between the centers of the winding shafts according to the winding diameter, the size of the turret lathe increases as the winding diameter increases. Consequently, the machine has to become bigger with increasing winding diameter, which inevitably increases the manufacturing cost significantly. In addition, as the distance between winding shafts increases, the path length of the web during a shaft change increases, causing neck-in or wrinkles in the case of a particularly easy-to-stretch film or the like. Furthermore, when the distance between winding shafts is large, the traveling distance of a roll core through rotation of the turret lathe during a shaft change is large, so it is difficult to achieve a short cycle of shaft changes.
In terms of power transmission, in the turret-lathe type, because the winding shafts are within the turret lathe, it is necessary to install winding motors outside the winding arm in a number equal to the number of shafts so as to transmit power to the winding shafts via the primary shaft portion of the rotating turret lathe. As a result, a large-sized power transmitting apparatus is required, and a large mechanical loss of rotation occurs, causing a considerable problem of controlling the transmission torque necessary for the winding shafts.
Under the circumstances, in order to resolve the problems encountered with the above-described conventional turret-lathe-type winding machine, the present applicant focused on a type of winding machine that is different from the turret lathe type, and found and proposed a linear-motion-type winding machine in which the shafts independently move in a forward direction and a rearward direction and in an up direction and a down direction in an area in which they do not interfere with each other (see, for example, Patent Document 1).
This winding machine does not use a turret lathe, and is configured such that winding shaft holding parts are provided independently so as to be positioned in forward and back positions and upper and lower positions, and the two winding shafts are moved straightforwardly in an area that they do not interfere with each other in a forward direction and a rearward direction and in an up direction and a down direction; and, thereby, a continuously fed web can be cut, and the shaft around which the web is wound can be changed to a new shaft. This winding machine is provided with a first touch roller that allows a web fed to the vicinity of a winding position to be wound around a winding shaft with the first touch roller being in pressure contact, and a second touch roller that is moved while being in pressure contact with a fully wound roll at the winding position when moving the roll.
[Patent Document 1] Japanese Patent No. 3052086
However, in the above-described winding machine of Patent Document 1, the first touch roller is brought into pressure contact with the web and winding is performed, the second touch roller is moved while being in pressure contact with the fully wound roll, and take over of the winding shaft is performed between the first touch roller and the second touch roller, that is, a new shaft side and a fully wound shaft side. Accordingly, there are problems in that when the roll is fully wound roll and take over is performed between the first touch roller and the second touch roller, wrinkling and neck-in occur, causing a loss in the web.
In order to cope with the above-described problems, the present invention has been accomplished by placing focus on the elimination of the take-over from one touch roller by another touch roller and the prevention of a loss in a web, based on a finding that one touch roller is kept in pressure contact from the start of winding to the end of winding. It is an object of the present invention to eliminate the use of a turret lathe, prevent the occurrence of wrinkling and neck-in during shaft changes, and achieve winding and shaft changing for a web of superior quality.
In order to achieve the above object, a winder that winds a web according to the present invention is winder including: a front winding base frame and a rear winding base frame that are arranged oppositely with a prescribed spacing therebetween and that move in a forward direction and a rearward direction, wherein winding arms that hold a winding shaft are attached to the front winding base frame and the rear winding base frame, respectively, so as to be capable of ascending and descending vertically, the winding arms are detachably attached so as to be capable of being exchanged between the front winding base frame and the rear winding base frame without interfering with each other, a front-side touch roller frame and a rear-side touch roller frame that correspond to the front winding base frame and the rear winding base frame, respectively, are provided under the front winding base frame and the rear winding base frame, the front-side touch roller frame that corresponds to the front winding base frame is fixed, and the rear-side touch roller frame that corresponds to the rear winding base frame is disposed so as to be capable of slidingly moving in a forward direction and a rearward direction, a touch roller is attached to each of the front-side touch roller frame and the rear-side touch roller frame so as to be capable of ascending and descending vertically, the touch rollers are detachably attached so as to be capable of being exchanged between the front-side touch roller frame and the rear-side touch roller frame without interfering with each other, and the winding shaft of the winding arm attached to the front winding base frame is passed on to the rear winding base frame while the touch roller attached to the front-side touch roller frame is in pressure contact with the winding shaft.
Also, in order to achieve the above object, a winder that winds a web according to the present invention is a winder including: a front winding base frame and a rear winding base frame that are arranged oppositely with a prescribed spacing therebetween and that move in a forward direction and a rearward direction, wherein winding arms that hold a winding shaft are attached to the front winding base frame and the rear winding base frame, respectively, so as to be capable of ascending and descending vertically, the two winding arms are detachably attached so as to be capable of being exchanged between the front winding base frame and the rear winding base frame without interfering with each other, a front-side touch roller frame and a rear-side touch roller frame that correspond to the front winding base frame and the rear winding base frame, respectively, are provided under the front winding base frame and the rear winding base frame, the front-side touch roller frame that corresponds to the front winding base frame is fixed, and the rear-side touch roller frame that corresponds to the rear winding base frame is disposed so as to be capable of slidingly moving in a forward direction and a rearward direction, a touch roller is attached to each of the front-side touch roller frame and the rear-side touch roller frame so as to be capable of ascending and descending vertically, the two touch rollers are detachably attached so as to be capable of being exchanged between the front-side touch roller frame and the rear-side touch roller frame without interfering with each other, the web is wound around the winding shaft of one winding arm that is attached to the front winding base frame while one touch roller that is attached to the front-side touch roller frame is in pressure contact with the winding shaft; after the winding shaft of the one winding arm is fully wound with the web, the winding shaft of the one winding arm around which the web has been fully wound is passed on to the rear winding base frame while the one touch roller is in pressure contact therewith, and the one touch roller is passed on to the rear-side touch roller frame; in turn, the winding shaft that will serve as a new winding shaft of another winding arm attached to the rear winding base frame is passed on to the front winding base frame, and another touch roller attached to the rear-side touch roller frame is passed on to the front-side touch roller frame; the other touch roller is brought into pressure contact with the new winding shaft; and after that, the web is cut between the two winding arms and the web is wound around the new winding shaft.
In the aforementioned configuration, at least either a stopper pin and an engagement hole, or a magnet is used as an attachment/detachment means of the winding arm with respect to the front winding base frame and the rear winding base frame, and an attachment/detachment means of the touch roller with respect to the front-side touch roller frame and the rear-side touch roller frame.
According to the present invention, it becomes possible to eliminate the take-over from one touch roller by another touch roller during a shaft change and prevent a loss in a web. Specifically, according to the present invention, because one touch roller that is in pressure contact with a roll can be used from the start to end of winding, it becomes possible to eliminate the use of a turret lathe, prevent the occurrence of wrinkling and neck-in during a shaft change, and achieve winding and shaft changing for a web of superior quality.
Specifically, according to the above-described winder of the present invention, when the end of the web is wound around a new winding shaft by exchanging the winding arms between the front and rear winding base frames by moving the two base frames back and forth, and also by exchanging the touch rollers between two touch roller frames, one winding shaft in pressure contact, that is, the same touch roller is used throughout the full winding of the web, the cutting of the web, the winding of the end of the web around a new winding shaft and the next shaft change, and in turn, another touch roller is brought into pressure contact with a new winding shaft after a shaft change. That is to say, in the present invention, the operation performed between the completion of winding and the changing of a shaft to another shaft is performed by using the same touch roller, as a result of which, because the take-over from one touch roller by another touch roller is not performed, it is possible to prevent the occurrence of wrinkling and neck-in in the web that are caused by such a take-over from one touch roller by another touch roller and to eliminate a loss in the web during a shaft change. In contrast, according to the previous proposal described above, after the end of a web is wound with a touch roller for winding at the start of winding, winding of the web is taken over to another winding touch roller and shaft changing is performed while the other winding touch roller is in contact (the take-over performed between a new shaft side and a fully wound shaft side), so it does not have the effects of the present invention.
Hereinafter, a specific embodiment of a winder (a two-shaft lossless winder) according to the present invention will be described in detail with reference to the accompanying drawings.
In these diagrams (
The winder according to the present embodiment is provided with winding arms 3A and 3B that respectively hold winding shafts 4A and 4B around which a web is wound. As shown in
In addition, in the front winding base frame 1A and the rear winding base frame 1B, stopper pins 7 and 8 are attached to the sides sandwiching the lifting apparatuses 5a, 5b and 6a, 6b, and engagement holes 9 and 10 that correspond to the stopper pins 7 and 8 are formed in the winding arms 3A and 3B, so that the winding arms 3A and 3B can be attached and detached by engaging and disengaging the stopper pins 7 and 8 with and from the engagement holes 9 and 10 (attachment/detachment means of the winding arm with respect to the front and rear winding base frames as set forth in the present invention).
Furthermore, similar to the engagement holes 9 and 10, the lifting apparatuses 5a, 5b and 6a, 6b are provided with magnets 11 and 12 (attachment/detachment means of the winding arm with respect to the front and rear winding base frames as set forth in the present invention).
The winding arms 3A and 3B can be attached and detached to and from the front winding base frame 1A and the rear winding base frame 1B by the engagement and disengagement (attachment and detachment) of the stopper pins 7 and 8 and the magnets 11 and 12, so that the winding arms 3A and 3B can be exchanged for each other as appropriate.
In the present embodiment, as shown in the diagrams, a configuration is adopted in which the attachment and detachment of the winding arms 3A and 3B are performed through a combined use of the engagement and disengagement of the stopper pins 7 and 8 with and from the engagement holes 9 and 10 and the attachment and detachment of the magnets 11 and 12 so as to exchange the winding arms 3A and 3B, but the configuration is not necessarily limited thereto, and other attachment/detachment means may be used.
Reference numerals 13A and 13B denote touch roller frames that are installed under the front winding base frame 1A and the rear winding base frame 1B, that is, under the winder so as to correspond to the front winding base frame 1A and the rear winding base frame 1B, respectively. Usually, as shown in
In the above-described configuration, as stated above, the winding arms 3A and 3B are capable of being attached and detached to and from the front winding base frame 1A and the rear winding base frame 1B so that the winding arms 3A and 3B can be exchanged, and the touch roller holders 15A and 15B are capable of being attached and detached to and from the touch roller frames 13A and 13B so that the touch roller holders 15A and 15B can be exchanged, but when these members are detached so as to be exchanged, it is important to adopt an arrangement that does not allow these members to interfere with each other.
The winder according to an embodiment of the present invention is configured as described above, and a web W fed from a pre-process passes through a plurality of guide rollers 28, 29, 30, 31, 32 and 33 to a winding position. The web W fed to the winding position is sequentially wound around the winding shaft 4A held by the winding arm 3A with the touch roller 16A being in pressure contact at the winding position. At this time, the holder 15A of the fixed touch roller frame 13A is positioned at the winding position, and the touch roller 16A is brought into pressure contact with the winding shaft 4A at the winding position.
Meanwhile, the winding arm 3B in which winding of the web W is not performed is on standby at a standby position together with the rear winding base frame 1B, without interrupting the winding around the winding shaft 4A of the winding arm 3A (see
Then, the winding of the web W around the winding shaft 4A of the winding arm 3A proceeds, and when a wound roll R around the winding shaft 4A comes to being fully or nearly fully wound as shown in
The series of steps for winding a web W and changing a shaft performed by the winder according to an embodiment of the present invention including the above steps is specifically performed in accordance with the procedure shown in
When a fully wound roll R is formed around the winding shaft 4A, as shown in
In this state, as shown in
In the state shown in
As described above, after the vertical exchange of the winding arms 3A and 3B between an upper position and a lower position, and the exchange between the touch roller frames 13A and 13B have been performed, as shown in
After the state of
After the above-described series of steps for changing a shaft, the winding of the web W around the winding shaft 4B, which is the new winding shaft, starts in the winding arm 3B of the front winding base frame 1A that has been moved to the front side. On the rear winding base frame 1B side, on the other hand, the fully wound roll R is removed as a product.
With respect to removing it as a product, as shown in
Then, when the above-described series of steps end, as shown in
As described above, the winder of the present embodiment, unlike conventionally techniques, does not require the use of a turret lathe, and is capable of independently changing the winding arms with respect to the front winding base frame and the rear winding base frame. In addition, the need for take-over from one touch roller by another touch roller is eliminated, so the cutting of the web, the winding of the end of the web, the subsequent winding of the web around the winding shaft, and the changing of the shaft to another shaft are all performed by using the same touch roller, that is, the touch roller in pressure contact with the roll, whereby the occurrence of wrinkling caused by take-over from one touch roller by another touch roller as well as the occurrence of neck-in can be prevented, enabling efficient winding.
The present invention may be embodied in various other forms without departing from the gist or essential characteristics thereof. Therefore, the embodiment described above is to be considered in all respects as illustrative and not limiting. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all modifications or changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.
This application claims priority on Japanese Patent Application No. 2008-103233 filed in Japan on Apr. 11, 2008, the entire contents of which are incorporated herein by reference.
The present invention is applicable to a winding machine that winds various webs.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2008-103233 | Apr 2008 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2009/056798 | 4/1/2009 | WO | 00 | 8/4/2010 |
