JP2018193194A - Web winding device - Google Patents

Abstract

To provide a web winding device capable of stably carrying out switching at a high winding speed using a tapeless core.SOLUTION: A winding device 1 for continuously winding up a web W in a roll form while alternately switching cores C includes a nip roller 5 for gripping a running web W with a new core Cn in switching, a cutter 6 for cutting the web W in a position apart from a gripping position NP to a downstream side, a static electricity-imparting device 9 for generating static electricity in the vicinity of the new core Cn, and a static eliminator 70 for eliminating static electricity in the vicinity of the new core Cn, and the static eliminator is placed at an outlet side of a position in which the web W is brought into contact with the new core Cn.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a winding device that is incorporated in a production line such as a printing machine or a coating machine and continuously winds a long web while alternately switching winding cores.

  In such a winding device, when the core is switched, it is necessary to automatically cut the web and wind the cut end around the core. Therefore, the core having the adhesive tape on the outer peripheral surface (the core with the tape) ) Is commonly used.

  For example, in Patent Document 1, a web is pressed against a core with a tape by a pressing roller, the traveling web is clamped, and the cutter blade is rotated at a position downstream of the clamping position, thereby pushing the surface. A winding device is disclosed in which a web is cut so that the cut end is wound around a core.

  In the winding device, when cutting the web, the tip end of the cut end is lifted from the core with tape, but the cutter can be wound around the core with tape without generating wrinkles. The peripheral speed of the blade is set faster than the peripheral speed of the surface of the core with tape, and the tip end portion of the cut end is pressed against the core with tape with a brush. Thereby, stable switching is realized at a relatively high winding speed of about 100 m / min.

  However, the tape core is difficult to handle because the surface sticks. Therefore, there is a demand for a winding device that can use a tapeless winding core (hereinafter also simply referred to as a winding core) without an adhesive tape, and various winding devices have been proposed.

  For example, Patent Document 2 proposes a winding device that winds a web around a winding core using static electricity instead of adhesive. In the winding device, similarly to the winding device of Patent Document 1, a web traveling between the winding core and the pressing roller is sandwiched, the web is cut with a cutter blade, and the cut end is wound around the winding core. At that time, the core and the web are charged using a non-contact charging electrode that generates static electricity, and the web is attached to the core by adsorption of static electricity.

JP-A-8-281594 JP 58-220038 A

  The line speed of printing presses and the like has been increased, and accordingly, the winding device is required to stably wind up a web that runs at high speed. For example, in the past, it was only necessary to wind a web traveling at a speed of about 20 m / min, but in recent years, it has been required to stably wind a web traveling at a high speed of 200 m / min or more. It is becoming.

  In particular, production lines such as printing presses are often set to a line speed of about 200 m / min. Therefore, if the web can be stably wound at about 200 m / min, it can be continuously produced without lowering the line speed during winding, so that productivity can be greatly improved.

  Therefore, the present applicant has developed a winding device that can realize stable switching at a winding speed exceeding 200 m / min using a tapeless winding core.

  Under such circumstances, the present inventors examined the use of static electricity, and as in Patent Document 2, it is difficult to realize a high-speed winding speed only by charging the web or the like with a static electricity applying device. On the other hand, it was found that a high-speed winding speed exceeding 200 m / min can be realized by setting the static eliminator to a specific arrangement.

  Accordingly, an object of the present invention is to provide a web winding device that can realize stable switching using a tapeless winding core even at a high winding speed.

  The present invention relates to a winding device for continuously winding a web in a roll shape while alternately switching winding cores.

The winding device
The winding core has a pair of shaft support portions for individually controlling the rotation of the winding core, and the winding core is disposed at a winding position where the web is wound and a standby position where the winding core is replaced. Turrets to exchange positions,
At the time of switching, by advancing in the vicinity of the new core that is the core before winding positioned at the winding position, the web that is wound and travels by the core positioned at the standby position, A nip roller sandwiched between the new core,
A cutter that cuts the web at a position away from the clamping position where the nip roller and the new core clamp the web downstream.
A static electricity applying device for generating static electricity in the vicinity of the new core;
A static eliminator for removing static electricity in the vicinity of the new core;
Is provided.

  And the said static elimination apparatus is arrange | positioned at the exit side of the position which the said web contact | connected to the said new winding core.

  That is, according to this web winding device, the static eliminator is disposed on the outlet side (downstream in the traveling direction) where the web is in contact with the new winding core when the web is wound around the new winding core. ing. As a result of various investigations by the present inventors, the detailed mechanism is unknown, but the web W and the new core Cn can be efficiently charged by disposing the static eliminating device at such a specific position. It was proved that a strong adsorption force was obtained. By doing so, even with a tapeless core, stable switching can be realized at a high winding speed exceeding 200 m / min.

  In particular, the cutter is attached to a rotating arm whose base end portion is rotatably supported and a distal end portion of the rotating arm, and the rotating arm rotates to push the surface of the web. A cutting blade, and an elastically deformable pressing device that is attached to the tip of the rotating arm and contacts the end of the web cut by the cutting blade and presses against the new core. The pressing device may also serve as the static eliminating device by having conductivity.

  In such a case, stable switching at a high winding speed can be realized by a combination of the pressing action of the web by the pressing device, the action by controlling the cutting speed, and the adsorption action by static electricity.

  In this case, it is preferable that the pressing device is made of a metal brush body.

  If it does so, since a static elimination apparatus (pressing apparatus) is obtained only by slightly changing the structure of the existing apparatus, the web winding apparatus of the present invention can be realized at low cost.

  According to the web winding device of the present invention, stable switching can be performed using a tapeless core even at a high winding speed.

It is a figure explaining the suitable combination example of the static electricity provision apparatus of this invention, and a static elimination apparatus. It is the schematic which shows the web winding apparatus of this embodiment. It is a schematic enlarged view which shows the principal part of the web winding apparatus at the time of switching. It is a schematic enlarged view which shows the principal part of the web winding apparatus at the time of switching. It is the schematic which shows the state of the web winding apparatus at the time of winding. It is the schematic which shows the state of the web winding apparatus at the time of transfer. It is the schematic which shows the state of the web winding apparatus at the time of switching. It is the schematic which shows the web winding apparatus of another embodiment. It is the schematic which shows the state at the time of switching of the web winding apparatus of another embodiment. It is a table | surface which shows the result of a switching test.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

(Combination of static electricity applying device and static eliminating device)
When the present inventors have examined, even if static electricity is generated when the static electricity imparting device is disposed in the vicinity of the core (tapeless) and the web W is wound around the core C, 200 m / min. In addition to the winding speed, the web W could not be stably wound even at a winding speed of 50 to 100 m / min.

  It was estimated that the main cause was that the air layer moving with the surface of the web W or the core C hindered charging of the web W or the core C.

  That is, since the static electricity imparting device is not in contact with the web W, the ions generated by the static electricity imparting device move in the air and act on the surface of the web W or the core C to cause the web W or the core C to be in contact. Is charged. In the case of the traveling web W or the rotating core C, the air layer on the surface moves together with the web W and the core C while entraining air from the periphery. For this reason, it is estimated that even if the discharge is performed near the surface of the core C or the web W, the movement of ions is blocked by the flowing air layer, and the web W or the core C cannot be sufficiently charged. .

  In particular, when the winding speed is increased, the flow of the air layer on the surface of the web W or the winding core C is increased, so that charging becomes more difficult. Although it is conceivable to increase the amount of ions by increasing the voltage, sparks are generated when the voltage is increased, so there is an upper limit to the voltage that can be applied, and even if the voltage is increased to a level where sparks can be generated, it is satisfactory Adsorption power was not obtained.

  On the other hand, the present inventors can realize a winding speed exceeding 200 m / min by disposing the static eliminating device at a specific position on the outlet side where the web W is in contact with the core C. I found out.

  FIG. 1 shows a specific configuration example. In the configuration example shown in the figure, when the web W is wound around a new core C (tapeless), the web W traveling is held by being pressed against the core C by the nip roller 5. At the position downstream of the sandwiching position NP, the cutting blade 63 of the cutter 6 is rotated at a peripheral speed faster than the peripheral speed of the surface of the core C, and the web W is cut so as to penetrate the surface. Then, the tip end portion of the cut end is pressed against the core C by the brush body 70 (an example of a pressing device), and the tip end portion of the cut end is wound around the core C.

  The static electricity applying device 9 that generates static electricity is disposed in the vicinity of the entrance side of the clamping position NP (at least the position where the action of the static electricity applying device 9 reaches the core C and the web W). In this configuration example, the clamping position NP corresponds to a position where the web W is in contact with the core C. As long as it is in the vicinity of the clamping position NP, the position of the static electricity applying device 9 may be on the upper side as indicated by a solid line or may be on the lower side as indicated by a virtual line.

  When the static electricity imparting device 9 is arranged in this way, ions generated by the static electricity imparting device 9 are carried to the clamping position NP along the flow of the air layer on the surfaces of both the web W and the core C. Therefore, since it is sandwiched between both the web W and the core C that are in close contact with each other, it is easy to directly act on them. Therefore, inhibition by the air layer can be alleviated, and the web W and the core C can be efficiently charged, so that a good adsorbing force can be obtained.

  In particular, the static electricity applying device 9 is preferably close to the clamping position NP. Specifically, as viewed from the direction in which the rotation axis of the core C extends, the tangent to the surface of the core C, the web W, and the core C at a position where the rotation direction of the core C is returned 90 degrees from the clamping position NP. It is preferable to install the static electricity imparting device 9 so as to be discharged through a gap having a V-shaped cross section partitioned by the surface of the surface. Then, ions are more efficiently sent to the sandwiching position NP by the flow of the air layer on the surface of the web W that goes straight to the sandwiching position NP and the flow of the air layer on the surface of the core C that is wound around the sandwiching position NP. be able to.

  The static eliminator for removing static electricity is disposed in the vicinity of the exit side of the clamping position NP. In the illustrated configuration example, the brush body 70 also serves as a static eliminator.

  That is, the brush body 70 is configured by bundling thin needle-like or fiber-like members having electrical conductivity (property of easily conducting electricity). As a material of the brush body 70, metal fiber, carbon fiber, amorphous fiber, or the like can be used. The brush body 70 is particularly preferably a metal fiber because it needs moderate elasticity in its function. The brush body 70 is grounded (grounded) through the support member.

  At the time of winding the web W, the cutting blade 63 and the brush body 70 are displaced upward from below the web W and cross the exit side of the clamping position NP. In the process, the brush body 70 passes near the exit side of the clamping position NP. The brush body 70 has a high porosity and is difficult to receive air resistance. Therefore, when the brush body 70 passes through the space near the outlet side of the clamping position NP, the air layer in the space is not greatly disturbed, so that the charge can be removed efficiently.

  It is known that when the tip of a grounded needle-shaped conductor faces a charged object, an electric field is formed in the space between them. Accordingly, when such a brush body 70 is opposed to the static electricity applying device 9 with the sandwiching position NP interposed, a strong electric field is formed between them. Thereby, the ions generated in the static electricity applying device 9 are guided to the holding position NP, and the web W and the core can be efficiently charged and discharged, and these can be adsorbed smoothly and quickly. It is done.

  As the brush body 70 is displaced, the electric field is also biased toward the core, so that the web W can be more smoothly and quickly adsorbed to the core.

  When the web W is cut by the cutter 6, the tip portion of the cut end is immediately pressed against the winding core C by the brush body 70. Therefore, the web W can be stably wound around the winding core C by the mechanical action of the brush body 70 along with the adsorption action due to static electricity. Since the brush body 70 contacts the tip end portion of the cut end of the web W and presses it against the core C, unnecessary static electricity on the surface portion of the web W wound around the core C is quickly removed.

  Thus, by arranging the static electricity applying device 9 and the static eliminating device 70, a winding speed exceeding 200 m / min can be realized (details will be described later).

(Web winding device)
FIG. 2 shows a web winding device 1 according to this embodiment. The web winding device 1 performs printing or coating on the web W while continuously unwinding the web W made of synthetic resin such as PET, OP, CP, etc. It is used again in the final process of a production line (not shown) of a so-called roll-to-roll printing machine or coating machine that is wound up in a roll shape. The web winding device 1 is configured to continuously wind the web W in a roll shape while automatically and alternately switching the winding core C without stopping the production line.

  In particular, the production line of the present embodiment is intended for food-oriented webs, and the line speed (speed at which the web W is conveyed in the production process) is set to around 200 m / min.

  The web winding device 1 is configured such that a thick paper core C having a cylindrical shape with a length of about 1 to 2 m and having no adhesive tape on the outer peripheral surface can be used. That is, in this web winding device 1, a general tapeless core C can be used as it is. In particular, in the case of the web winding device 1, a relatively small diameter core C having a diameter of 6 inches or less can be used, and the small diameter core C travels at a high speed of 100 m / min or more. The web W is devised so that it can be switched stably.

  The web winding device 1 includes a turret 3, a nip roller 5, a cutter 6, a near roller 8, a static electricity applying device 9, a dancer roller 11, various guide rollers R, and the like. These devices are provided from a frame 15a, a base 15b, and the like. It is assembled | attached to the support body 15 which becomes. The nip roller 5 and the like are installed on an arch-shaped frame 15a, and the turret 3 is installed on the base 15b so as to be adjacent to the frame 15a. The central axes of the rotating devices such as the turret 3 and the nip roller 5 are arranged in parallel to each other and extend in a direction (axial direction) orthogonal to the running direction of the web W.

  The turret 3 includes a pair of support plates 31, 31, a main shaft 32, a pair of shaft support portions 36, 36, a pair of main bearing portions 34, 34, a pair of auxiliary rollers 33a, 33a, and the like (two-shaft turret method). ). Each support plate 31 is made of the same member having a cross shape, and is opposed to each other in the axial direction. The main shaft 32 is fixed to the support plates 31 so as to penetrate through the centers of the support plates 31.

  A pair of lateral ribs 33, 33 are installed between the support plates 31, 31. Both ends of the main shaft 32 are rotatably supported by a pair of main bearing portions 34, 34 installed on the base 15 b, and one main bearing portion 34 has a drive motor (see FIG. (Not shown) are connected. On the outer peripheral side of each lateral rib 33, an auxiliary roller 33a used when switching the winding core C is provided in a rotatable state symmetrically with respect to the center of the support plate 31.

  The pair of shaft support portions 36 and 36 are symmetrically arranged at positions away from the center of the support plate 31 so as to be orthogonal to the pair of auxiliary rollers 33a and 33a. Each shaft support portion 36 has a pair of projecting shafts arranged to face the opposing surfaces of both support plates 31, 31, and both ends of the core C are detachably attached to the pair of projecting shafts. Is done. A winding motor is connected to one of the projecting shafts of each shaft support portion 36, and the winding core C attached to the shaft support portion 36 can be controlled to rotate (center drive winding method).

  The turret 3 is configured such that the position of the core C attached to both shaft support portions 36 and 36 is exchanged between a winding position where the web W is wound and a standby position where the core C is replaced. The rotation is controlled. In FIG. 2, a position where the left shaft support portion 36 near the frame 15 a is a winding position, and a position where the right shaft support portion 36 is located is a standby position.

  Around the main shaft 32, a pair of auxiliary arm structures 37, 37 corresponding to the pair of shaft support portions 36, 36 are installed in a point-symmetric manner. Each auxiliary arm structure 37 has two auxiliary arms 37a arranged in the vicinity of each support plate 31, and a touch used when winding the web W between one end of both auxiliary arms 37a and 37a. A roller 37b is rotatably supported. Each auxiliary arm structure 37 swings around a shaft portion located on the other end side of each auxiliary arm 37a, and the outer periphery of a roll formed by winding the web W around the winding core C located at the winding position. It is configured to be controllable so that the touch roller 37b contacts the surface with a predetermined load.

  The nip roller 5 is attached to a roller support 51 (second support member) installed on the frame 15a. The roller support 51 is opposed to each other in the axial direction, and a pair of roller support arms 51a and 51a whose one end is pivotally supported by the frame 15a and swings the roller support arms 51a. And a cylinder 51b. The nip roller 5 is rotatably supported at the other end of the roller support arms 51a and 51a.

  As the roller support arm 51a swings, the nip roller 5 advances in the vicinity of the core C before winding (new core Cn) located at the winding position, and the surface of the nip roller 5 is placed below the new core Cn. It is configured to be switchable between a switching position to be pressed and a non-switching position that is located far away from the new core Cn. When the nip roller 5 is positioned at the switching position, the web W that is wound around the core C positioned at the standby position is sandwiched between the outer peripheral surface of the nip roller 5 and the outer peripheral surface of the new core Cn. In the web winding device 1, this clamping position is a position where the web W is in contact with the new core Cn (also referred to as a clamping position NP).

  The cutter 6 is installed on a cutter support body 62 installed on the frame 15 a together with the cutting auxiliary roller 61. The cutter support 62 is opposed to each other in the axial direction, and a pair of cutter support arms 62a and 62a whose upper ends are pivotally supported by the frame 15a below the winding position, and the cutters. And a cylinder 62b for swinging the support arms 62a and 62a.

  Each cutter support arm 62a has a shape in which a lower end portion is bent in a J shape toward the turret 3, and a cutter 6 and a cutting auxiliary roller 61 are provided between the protruding ends of the lower end portions of the cutter support arm 62a. It is attached. When the cutter support arms 62a and 62a are swung, the cutter 6 and the auxiliary roller 33a are moved forward to the new core Cn side, and a non-switching position located far away from the new core Cn. And can be switched.

  As shown in detail in FIG. 3, the cutter 6 includes a cutting blade 63 and a pair of rotating arms 64 and 64. A base end portion of each rotating arm 64 is rotatably supported by each cutter support arm 62a, and is attached to a distal end portion of each rotating arm 64 so that a horizontally long cutting blade 63 is bridged. The cutting blade 63 swings so that the rotating arm 64 is flipped up, and cuts the web W through the surface of the web W through a position away from the clamping position NP to the downstream side. It is configured as follows.

  The cutter 6 is accommodated between the cutter support arms 62a and 62a, and is controlled so that the rotating arm 64 swings during cutting. In order to appropriately wind the end portion of the web W that is cut by the cutting blade 63 and floats around the new core Cn, the swing speed of the rotating arm 64 is higher than the peripheral speed of the surface of the new core Cn. The web W is set to be cut at a high peripheral speed.

  A pair of brush bodies 70 and 70 (an example of a pressing device) extending in two rows along the cutting blade 63 are attached to the outer peripheral side of the cutting blade 63. These brush bodies 70 come into contact with the surface of the new core Cn when the cutting blade 63 passes by the side of the new core Cn, and the end of the web W cut by the cutting blade 63 is connected to the new core Cn. It is configured to press against.

  The brush body 70 of the present embodiment also serves as a static eliminator and is made of a metal material having excellent conductivity.

  Specifically, the brush body 70 is configured by bundling thin needle-like or fibrous members (brush elements) made of stainless steel. The brush body 70 needs to be elastic enough to bend and deform in order to be stably pressed against the new core Cn without damaging the web W. Therefore, it is preferable to set the wire diameter (outer diameter of the cross section) of the brush element in the range of 5 to 25 μm, and the length is preferably set in the range of 10 to 40 mm.

  If it is a stainless steel brush element, by setting in such a range, a pressing performance equivalent to or higher than that of a conventional brush or resin brush body can be obtained. Moreover, since it will not generate | occur | produce rust if it is stainless steel, foreign material mixing can be prevented and it is suitable for the use for foodstuffs. In addition, it is preferable to make the front end side of the brush element thinner than the base end side, and it is preferable to round the tip of the brush element into a spherical shape.

  As shown in detail in FIG. 4, the static electricity applying device 9 is installed on a bar support 91 (first support member) installed on the frame 15a. The bar support 91 includes a pair of swing plates 91a and 91a provided on both side walls of the frame 15a that are separated from each other in the axial direction, a cylinder 91b that swings the swing plates 91a and 91a, and the swing plates 91a. It has a slide part 91c that is installed between the tip parts and can project from the swing plate 91a, and a sub cylinder 91d that slides the slide part 91c. The static electricity applying device 9 is attached to the slide portion 91c via a bracket 93 that is a metal conductor.

  The static electricity imparting device 9 has a horizontally long bar body 9a extending in the axial direction and a plurality of discharge needles 9b arranged side by side at equal intervals on the bar body 9a. These discharge needles 9b are connected to a DC high voltage generator 94, and are configured to be able to apply a positive or negative voltage of 10 to 30 kV, for example. In the static electricity applying device 9, a negative voltage is applied to the discharge needle 9b, and negative ions are generated around the discharge needle 9b.

  At the time of switching, the swing plate 91a swings from the standby position away from the winding position, and after the tip part has advanced to the vicinity of the winding position, the slide part 91c protrudes. Thereby, the static electricity provision apparatus 9 approaches the clamping position NP without contacting the web W or the new core Cn, and is disposed at an appropriate position. Specifically, the static electricity applying device 9 is displaced in the vicinity of the new core Cn so that the discharge needle 9b is directed toward the clamping position NP, and is on the inlet side of the clamping position NP, with respect to the web W. It is arranged on the side where the new core Cn is located.

  As shown in FIG. 2, the near roller 8 is installed on a slide mechanism 81 installed on the frame 15a. The slide mechanism 81 has a pair of sliders 81a and 81a provided on both side walls of the frame 15a that are located apart in the axial direction. Both sliders 81a and 81a are configured to slide substantially horizontally at substantially the same height as the winding position, and the projecting ends thereof advance and retract toward the turret 3 side. A near roller 8 and a support roller 81b that assists the near roller 8 are rotatably supported between the projecting ends of the sliders 81a and 81a. The near roller 8 is disposed closer to the turret 3 than the support roller 81b.

  Both sliders 81a are controlled so that the near roller 8 maintains a certain gap with respect to the roll during winding. At the time of switching, both the sliders 81a are moved backward, and the near roller 8 is controlled so as to be positioned away from the new core Cn.

  The various guide rollers R and dancer rollers 11 are rotatably supported between the side walls of the frame 15a so that the web W is wound around and the traveling direction is guided in a predetermined direction. The dancer roller 11 is supported in a displaceable state on the frame 15a so that the travel distance of the web W can be temporarily increased or decreased.

<Operation of web winding device>
FIG. 5 shows an example of the state of the web winding device 1 during winding. At the time of winding, the nip roller 5, the cutter 6, and the static electricity applying device 9 are on standby at a non-switching position away from the winding position. Each shaft support 36 is provided with a core C having a diameter of 6 inches, and is guided by various guide rollers R, dancer rollers 11, support rollers 81b, and near rollers 8 to the core C located at the winding position. The web W running at a high speed of 150 m / min or more is wound. The web W is continuously wound up until the diameter of the roll reaches a predetermined size.

  At the time of winding, the tension of the web W and the load of the touch roller 37b are adjusted appropriately. Further, the near roller 8 moves backward so as to maintain a certain gap with the roll having a gradually increasing diameter. By maintaining a constant gap with a short travel distance of the web W between the near roller 8 and the roll, it becomes possible to suppress vertical wrinkles (troughs) generated in the longitudinal direction of the web W, and the amount of air entrainment Can be reduced. As a result, even when the winding core C having a small diameter is wound at a high speed, it is possible to effectively suppress problems that occur when winding the web W such as wrinkles and slips.

  Then, when the diameter of the roll reaches a predetermined size, a switching process is performed. Specifically, when one of the auxiliary arm structures 37 is controlled to swing, the touch roller 37b in contact with the roll is released. Then, the turret 3 rotates (counterclockwise in FIG. 5), and the positions of both shaft support portions 36 and 36 are exchanged. Thereby, as shown in FIG. 6, the winding core C before winding in the standby position moves to the winding position, and then a new winding core Cn for winding the web W is formed. The roll at the winding position moves to the standby position, and the running web W is wound around one auxiliary roller 33a and guided in a V shape, and is continuously wound at the standby position. The new core Cn at the time of switching is controlled to rotate at an appropriate speed with respect to the traveling web W.

  Subsequently, as shown in FIG. 7, after the swing plate 91 a swings and the tip portion thereof advances to the vicinity of the winding position, the slide portion 91 c protrudes, and the static electricity applying device 9 is disposed at an appropriate position. Is done.

  Then, the roller support arm 51a and the cutter support arm 62a are swung, whereby the nip roller 5 and the cutter 6 advance to the vicinity of the winding position. Thereby, the web W is supported by the cutting auxiliary roller 61 and the nip roller 5 is pressed against the lower part of the new core Cn, and is sandwiched between the new core Cn and the nip roller 5. When the web W is sandwiched between the new core Cn and the nip roller 5, the main body of rotation control of the shaft support portion 36 is switched from the shaft support portion 36 located at the standby position to the shaft support portion 36 located at the winding position. .

  A voltage is applied to the discharge needle 9b in conjunction with the clamping operation of the web W by the new winding core Cn and the nip roller 5, and discharge is performed. As a result, static electricity is generated around the discharge needle 9b, and both the web W and the new core Cn are charged.

  Further, the web W is cut by the cutter 6 in conjunction with the sandwiching operation of the web W by the new core Cn and the nip roller 5. Specifically, the web W is cut by the swinging arm 64 swinging and the cutting blade 63 jumping up at a peripheral speed faster than the peripheral speed of the surface of the new core Cn. The nip roller 5 has no adhesive tape. Accordingly, it is possible to nip the new core Cn in advance before cutting, and it is possible to effectively prevent the web W from being wrinkled by an impact at the time of cutting.

  At that time, the brush body 70 crosses the exit side of the clamping position NP and passes through the vicinity of the exit side of the clamping position NP. As a result, a strong electric field is formed between the static electricity applying device 9 and the leading end portion of the cut end of the web W and the new core Cn are efficiently charged and discharged, so that a strong adsorption force is obtained. As a result, even at high speed processing, the leading end portion of the cut end of the web W can be smoothly guided to the new core Cn side.

  Further, the tip end portion of the cut end floating from the new core Cn is pressed against the new core Cn by the brush body 70. Therefore, the web W can be stably wound around the new core Cn without causing problems such as wrinkles. Since an electrostatic attraction force acts between the web W and the new core Cn, even if there is no adhesive tape, it can be surely wound around the new core Cn without peeling off. Since the brush body 70 contacts the web W, unnecessary static electricity on the surface of the web W can be quickly removed.

  Moreover, at the time of cutting | disconnection, you may set so that the travel distance of the web W which drive | works upstream from the new core Cn may increase by the action | operation of the accumulator apparatus which is not shown in figure. If it does so, the running speed of the web W which passes the new winding core Cn falls temporarily, and it can cut | disconnect the web W more appropriately.

  When the web W is cut and the web W is wound around the new core Cn, the nip roller 5 is separated from the new core Cn, and the application of voltage to the discharge needle 9b is stopped. Thereafter, the nip roller 5, the cutter 6, and the static electricity applying device 9 are moved to the non-switching position, and the corresponding auxiliary arm 37 a structure 37 is controlled to swing, thereby being wound around the new core Cn. The touch roller 37b contacts the outer peripheral surface of the roll.

  The near roller 8 is controlled to advance so as to maintain a certain gap with respect to the roll, and then gradually move backward while holding the certain gap. The web W is wound around the new core Cn while changing the load and winding tension of the touch roller 37b. When the roll diameter reaches a predetermined size, the new core mounted at the standby position is wound. Switch to C.

<Another embodiment>
8 and 9 show an example applied to another web winding device 1 '. The web winding device 1 ′ includes a turret 3, a winding roller 104, a nip roller 5, a cutter 6, a counter roller 107, a near roller 8, a static electricity applying device 9, a brush body 70 (an example of a static eliminating device), a dancer roller 11, various types A guide roller R and the like are provided. Since the basic structure of this web winding device 1 'is the same as that of the web winding device 1 of the above-described embodiment, the same reference numerals are used for members having the same functions, and the description thereof is omitted.

  Each support plate 31 of the turret 3 is made of the same disk-shaped member, and is configured to rotate while being supported by the auxiliary bearing portion 135.

  The winding roller 104, the nip roller 5, and the cutter 6 are installed in a web push-up mechanism 141 installed in the frame 15a. The web push-up mechanism 141 has a pair of push-up arms 141a and 141a which are opposed to each other in the axial direction and whose upper end is pivotally supported by the frame 15a below the winding position, and these push-up arms. 141a, 141a and a push-up cylinder 141b for swinging.

  Each push-up arm 141a has a shape in which a lower end portion is bent in a J-shape toward the turret 3, and a winding roller 104 is rotatable between the protruding ends of the lower end portions of the push-up arms 141a and 141a. It is supported. When the push-up arms 141a and 141a are swung, the winding roller 104 is moved to a switching position where the winding roller 104 advances in the vicinity of the new core Cn and a non-switching position positioned far away from the new core Cn. It is configured to be switchable.

  The nip roller 5 is rotatably supported at a position adjacent to the winding roller 104, and the cutter 6 is disposed in the vicinity of the nip roller 5.

  The counter roller 107 is installed on a roller displacement mechanism 171 installed on the frame 15a. The roller displacement mechanism 171 has a pair of support arms 171a and 171a which are opposed to each other in the axial direction and whose lower end is pivotally supported by the frame 15a above the winding position, and the support arms 171a, It has a push-down cylinder 171b that is pushed down to the turret 3 side by swinging 171a. The counter roller 107 is rotatably supported between the protruding ends of the upper end portions of the support arms 171a and 171a. As both support arms 171a and 171a swing, the counter roller 107 switches between a switching position pressed against the upper part of the new core Cn and a non-switching position positioned far away from the new core Cn. It is configured to be controllable.

  The static electricity imparting device 9 is installed in the slide mechanism 81 together with the near roller 8. The static electricity applying device 9 is installed between the projecting end portions of both sliders 81 a so as to be positioned above the near roller 8.

  The brush body 70 is disposed between the nip roller 5 and the cutter 6. The brush body 70 is grounded through a push-up arm 141a and the like.

<Operation of web winding device>
As shown in FIG. 8, the winding roller 104 and the counter roller 107 at the time of winding are both in the non-switching position. Then, when the diameter of the roll reaches a predetermined size, a switching process is performed. First, the turret 3 rotates, the roll at the winding position moves to the standby position, and the running web W is continuously wound at the standby position.

  As shown in FIG. 9, the near roller 8 is in a state of having advanced to the vicinity of the upstream side of the new core Cn with respect to the traveling web W. When the push-up arm 141a is swung, the winding roller 104 moves to the switching position, and advances to the vicinity of the downstream side of the new core Cn with respect to the traveling web W. By doing so, in the web W that is wound around the core C positioned at the standby position and travels at a high speed, the downstream vicinity of the new core Cn is pushed up by the winding roller 104, and the new core Cn The web W is wound around the lower part.

  That is, the near roller 8 and the winding roller 104 cause the web W to be wound around a range approximately half of the new core Cn. Even the web W running at high speed is excessively applied to the tapeless core C. It can wind without giving a heavy load. Since the near roller 8 is located in the vicinity of the new core Cn, the travel path of the web W from the near roller 8 toward the new core Cn is close to the new core Cn, and air entrainment is suppressed. Thereby, even the web W running at high speed can be stably wound around the new core Cn.

  At this time, the static electricity imparting device 9 is located immediately above the web W traveling in the gap between the near roller 8 and the new core Cn with the discharge needle 9b facing downward. That is, the static electricity imparting device 9 is disposed on the entrance side of the position where the new core C first receives and contacts the web, and discharges into a gap having a V-shaped cross section between the new core Cn and the web W. It has become.

  When the winding roller 104 is located at the switching position, the nip roller 5 has a gap between the downstream portion of the web W wound around the new core Cn (the portion immediately before the web W is separated from the new core Cn). It is located apart. Therefore, the brush body 70 disposed between the nip roller 5 and the cutter 6 is in a state of being disposed on the exit side where the web W is in contact with the new core Cn.

  The nip roller 5 is set to advance toward the new core Cn at a predetermined timing and press the downstream side portion of the web W wound around the new core Cn against the new core Cn. At that time, in order to prevent the eccentricity of the new core Cn, the counter roller 107 moves to the switching position and is pressed against the upper part of the new core Cn in conjunction with the pressing operation of the nip roller 5. By doing so, the eccentricity of the new core Cn can be effectively suppressed. Static electricity is generated by the static electricity applying device 9 in conjunction with the timing when the nip roller 5 presses the web W against the new core Cn.

  The web W pressed by the nip roller 5 is cut by the cutter 6. The cutter 6 of the web winding device 1 'includes a cutting blade 161, a rodless cylinder 162 (an example of an actuator) that is driven by pneumatic pressure, and the like. The rodless cylinder 162 is installed between the protruding ends of the lower end portion of the push-up arm 141a. The cutting blade 161 is fixed to the slide block of the rodless cylinder 162, and is set to slide along the new core Cn at the time of cutting.

  The cutting blade 161 is in contact with the web W moving away from the new core Cn in the vicinity of the new core Cn, and cuts the web W so as to be cut off from one side edge. Thereby, the cut end of the web W is urged toward the new core Cn, and the cut end of the web W is wound around the new core Cn instantaneously together with the electrostatic attraction action.

  Since the brush body 70 is disposed on the outlet side where the web W is in contact with the new core Cn, unnecessary static electricity on the surface of the web W can be removed, and the brush body 70 has passed through the nip roller 5. Wrinkles and the like can be prevented from occurring on the subsequent web W. In addition, since the wire is wound around the new core Cn sequentially from the cut portion, wrinkles and the like generated in the width direction are prevented, and the cut end of the web W can be stably wound around the new core Cn.

<Verification results>
In each of the web winding device 1 (first winding device) of the embodiment and the web winding device 1 ′ (second winding device) of another embodiment, a switching test is performed, and a high winding speed is obtained. It was confirmed whether or not stable switching was possible.

  In the switching test, a web W having a different material, thickness, and configuration was used, and a switching process was performed on a core C having an outer diameter of 6 inches with a cutting tension of 100 N / m. As a result, FIG. 10 shows the winding speed at which stable switching of the web W was confirmed at the same level as when the taped core was used.

  In both the first and second winding devices, stable switching was possible at a winding speed of 200 m / min or more.

  The smaller the outer diameter of the winding core, the slower the rotation speed of the outer peripheral surface, which is advantageous as a winding condition. Accordingly, if the core has an outer diameter of 6 inches or less, stable winding is possible at a winding speed of 200 m / min.

  Therefore, if a core having an outer diameter of 6 inches or less is used in the production line to which the winding device of the embodiment is applied, it is possible to switch the tapeless core that is easy to handle without reducing the line speed. Productivity can be greatly improved.

1, 1 'web winding device 3 turret 5 nip roller 6 cutter 8 near roller 9 static electricity applying device 70 brush body (pressing device, static eliminating device)
C Core Cn New core W Web NP Clamping position

Claims (3)

A winding device for continuously winding the web into a roll while switching the winding core alternately,
The winding core has a pair of shaft support portions for individually controlling the rotation of the winding core, and the winding core is disposed at a winding position where the web is wound and a standby position where the winding core is replaced. A turret for exchanging positions;
At the time of switching, by advancing in the vicinity of the new core that is the core before winding positioned at the winding position, the web that is wound and travels by the core positioned at the standby position, A nip roller sandwiched between the new core,
A cutter that cuts the web at a position away from the clamping position where the nip roller and the new winding core clamp the web; and
A static electricity applying device for generating static electricity in the vicinity of the new core;
A static eliminator that removes static electricity in the vicinity of the new core;
With
A web winding device in which the static eliminator is disposed on the outlet side where the web is in contact with the new core. In the web winding device according to claim 1,
The cutter is
A rotating arm whose base end is rotatably supported;
A cutting blade that is attached to the tip of the rotating arm and pierces the surface of the web as the rotating arm rotates;
An elastically deformable pressing device that is attached to the tip of the rotating arm and contacts the end of the web cut by the cutting blade and presses against the new core;
Have
The web winding device in which the pressing device also serves as the static eliminator by having conductivity. In the web winding device according to claim 2,
A web winding device in which the pressing device is made of a metal brush body.

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