winding device

Abstract

This allows the winding start end to be properly wound onto the winding core. [Solution] During the rewinding operation to replace the core on which the film is wound, a winding promotion means 50 is provided to promote the winding of the starting end of the film cut by the cutting blade 33 onto the core. The winding promotion means 50 promotes the winding of the starting end of the film as it moves through the space between the drum 1 and the core, in response to the protrusion and retraction of the cutting blade 33 from the outer surface of the drum 1. As a result, the starting end of the film can be wound well onto the core during the rewinding operation, reducing the reduction in the rotational speed of the drum before the start of the rewinding operation, which in turn increases the amount of film wound per unit time and reduces the frequency of maintenance.

Description

Technical Field

[0001] The present invention relates to a winding device.

Background Art

[0002] Conventionally, a winding device using a surface winding method has been known (for example, refer to Patent Document 1). This type of winding device includes a drum to which a film is supplied, a turret mechanism that presses a core onto the drum side, and a frame that supports the drum and the turret mechanism so as to be relatively rotatable. The core is rotated while being carried around by the rotation of the drum, and the film is wound around the core.

[0003] Also, this type of winding device repeats an operation of feeding the film from the raw roll at high speed and winding it around the core, and a rewinding operation of replacing the core around which the film is wound. In this rewinding operation, the film is cut, and among the film ends, the film end located on the downstream side in the drum rotation direction (hereinafter referred to as the winding end) is wound around the winding roll, and the film end located on the upstream side in the drum rotation direction (hereinafter referred to as the winding start end) is wound around another core (so-called empty core) to start winding. Therefore, in order to stably cut the film supplied at high speed, it is preferable to make the relative speed difference between the film and the cutting blade as small as possible.

[0004] In view of this point, in the winding device disclosed in Patent Document 1, the cutting blade is built into the drum so as to eliminate the relative speed difference between the film and the cutting blade. Also, in the winding device disclosed in this Patent Document 1, in order to perform the protrusion and storage of the cutting blade from the drum at high speed, a protrusion mechanism part for protruding the cutting blade and a retraction mechanism part for retracting the cutting blade, which are composed of a cam member and a link mechanism, are built into the drum.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] Incidentally, in this type of winding device, in order to ensure stable rewinding, the drum's rotation speed is rapidly reduced before the start of the rewinding operation, and then rapidly increased after the completion of the rewinding operation. This process is repeated. As a result, there are limitations to increasing the amount of film wound per unit time, and it has been difficult to reduce the frequency of maintenance on the winding device due to the adverse effects of the sudden changes in the drum's rotation speed.

[0007] The inventors of the present invention have found that if the starting end of the film can be properly wound onto the empty core during the rewinding operation, the reduction in the rotational speed of the drum before the start of the rewinding operation can be reduced, or in some cases, the need to decelerate the rotation of the drum can be eliminated. This makes it possible to increase the amount of film wound per unit time and reduce the frequency of maintenance.

[0008] The present invention has been made in view of the above, and its object is to provide a winding device that enables the starting end of the film to be wound onto the winding core in a winding operation. [Means for solving the problem]

[0009] The present invention provides a solution for achieving the above objective, which is a winding device comprising a drum on which a film is supplied and a turret mechanism for pressing a winding core against the drum, wherein the winding core is carried along by the rotation of the drum, thereby winding the film onto the winding core, and during a rewinding operation in which the winding core on which the film is wound is replaced from a first winding core to a second winding core, the film is cut by a cutting blade, and the winding end located downstream in the direction of drum rotation of each film end is wound onto a winding roll formed by winding the film onto the first winding core, and the winding start end located upstream in the direction of drum rotation is wound onto the second winding core to start winding the film onto the second winding core. The winding device is further provided with a winding promotion means for promoting the winding of the winding start end onto the second winding core. The winding promotion means comprises an airflow generating member and an air passage, which are disposed downstream of the drum in the direction of rotation with respect to the film clamping position between the drum and the second core, and which are rotatable around a rotation axis parallel to the rotation axis of the drum. The airflow generating member is a wind turbine member having a plurality of blades, and compressed air is blown from the air passage onto the blades, causing the wind turbine member to rotate in the opposite direction to the rotation direction of the drum, thereby generating an airflow toward the winding start end that has passed the film clamping position. It is characterized by the following:

[0010] In conventional technology, the rotational speed of the drum was rapidly reduced before the start of the rewinding operation in order to ensure stable rewinding. However, with this solution, the winding promotion means allows the starting end of the film to be wound well onto the second core during the rewinding operation, making it possible to perform the rewinding operation stably. As a result, the reduction in the rotational speed of the drum before the start of the rewinding operation can be reduced, or in some cases, it may be unnecessary to decelerate the drum's rotation. This makes it possible to increase the amount of film wound per unit time and reduce the frequency of maintenance.

[0015] Furthermore, as another solution, a winding device is assumed to be provided, comprising a drum to which the film is supplied and a turret mechanism to press the winding core against the drum, wherein the winding core is carried along by the rotation of the drum and the film is wound onto the winding core, and during a rewinding operation in which the winding core that winds the film is replaced from the first winding core to the second winding core, the film is cut by a cutting blade, and the winding end located downstream in the direction of drum rotation of each film end is wound onto a winding roll formed by the film being wound onto the first winding core, and the winding start end located upstream in the direction of drum rotation is wound onto the second winding core to start winding the film onto the second winding core.This winding device is provided with winding promotion means for promoting the winding start end to wind onto the second winding core, and the winding promotion means is It is equipped with a winding-promoting member arranged to surround the outer circumference of the second winding core, The winding-promoting member has a core housing portion having an inner surface that is an arc shape with a larger diameter than the outer shape of the second core, a space is provided between the inner surface of the core housing portion and the second core, negative pressure is applied to the space, and the winding start end of the film cut by the cutting blade reaches the space after passing between the drum and the second core.

[0016] According to this, the winding start end, which has passed the film clamping position between the drum and the second winding core, can be detached from the outer surface of the drum by the negative pressure acting in the internal space of the winding core housing and properly wound onto the second winding core, thereby enabling stable rewinding operations. [Effects of the Invention]

[0020] In this invention, a winding promotion means is provided to promote the winding of the starting end of the film, which has been cut by a cutting blade, onto the second winding core during a rewinding operation in which the winding core on which the film is wound is replaced from the first winding core to the second winding core. This makes it possible to wind the starting end of the film onto the second winding core well during the rewinding operation, and to perform the rewinding operation stably. As a result, the reduction in the rotational speed of the drum before the start of the rewinding operation can be reduced, or in some cases, it may be possible to eliminate the need to decelerate the rotation of the drum, thereby making it possible to increase the amount of film wound per unit time and reduce the frequency of maintenance. [Brief explanation of the drawing]

[0021] [Figure 1] This is a schematic diagram showing the outline of a rewinding device equipped with a winding device according to one embodiment of the present invention. [Figure 2] This is a magnified view of the winding device shown in Figure 1. [Figure 3] Figure 2 shows the state in which the film has been wound onto the winding core at the winding position in the winding device. [Figure 4] Figure 3 shows the winding device in which the winding core has been moved to the retracted position and the film has been cut. [Figure 5] Figure 2 shows the inside of the drum of the winding device, viewed from one side in the axial direction. [Figure 6] Figure 2 shows the inside of the drum of the winding device, viewed from the other side in the axial direction. [Figure 7] This is a diagram equivalent to Figure 5, showing the state in which the cutting blade is being extended. [Figure 8] This is a diagram equivalent to Figure 6, showing the state in which the cutting blade is being extended. [Figure 9] This is a diagram equivalent to Figure 5, showing the cutting blade in its most protruding state. [Figure 10]It is a view corresponding to FIG. 6 showing the state where the cutting edge protrudes most. [Figure 11] It is a view corresponding to FIG. 5 showing the state during the retraction of the cutting edge. [Figure 12] It is a view corresponding to FIG. 6 showing the state during the retraction of the cutting edge. [Figure 13] It is a view corresponding to FIG. 5 showing the state where the cutting edge is completely retracted. [Figure 14] It is a view corresponding to FIG. 6 showing the state where the cutting edge is completely retracted. [Figure 15] It is an enlarged view of the main part showing the valve opening state in the first embodiment of the winding promotion means. [Figure 16] It is an enlarged view of the main part showing the valve closing state in the first embodiment of the winding promotion means. [Figure 17] It is a view seen from the arrow A direction in FIG. 15. [Figure 18] The second embodiment of the winding promotion means is shown. FIG. 18(a) is a view of the periphery of the core located at the winding position seen from one side in the axial direction, and FIG. 18(b) is a view of a part of the airflow generating member seen from the direction of arrow B in FIG. 18(a).

Mode for Carrying Out the Invention

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] The feature of the present invention is a configuration for cutting the film during the rewinding operation of replacing the core around which the film is wound, and promoting the winding of the film around the winding start core (the replaced empty core) located on the upstream side in the rotation direction of the drum among the ends of each film. Before explaining this configuration, the overall configuration of the rewinding device provided with the winding device according to this embodiment will be explained.

[0024] -Overall Configuration of the Rewinding Device- First, referring to FIGS. 1 and 2, the configuration of the rewinding device 200 provided with the winding device 100 according to an embodiment of the present invention will be described.

[0025] As shown in Figure 1, the rewinding device 200 is configured to rewind the film 201b, which is wound around the shaft 201a of the raw material roll 201, onto the winding core 150. This rewinding device 200 comprises the raw material roll 201, a feed roller 202, a plurality of transport rollers 203, a peeling assist roller 204, and a winding device 100.

[0026] The raw material roll 201 has a shaft 201a and a film 201b wound around the shaft 201a. The raw material roll 201 is configured such that the shaft 201a is rotatably supported, and the film 201b is unwound when the shaft 201a is rotated. The raw material roll 201 is also designed to be replaced when the film 201b is depleted due to unwounding. The film 201b is, for example, a food packaging wrap film made of resin such as PE (polyethylene), and has a thickness of 10-20 μm and a width of 20-30 cm.

[0027] The feed roller 202 is in contact with the outer circumferential surface of the raw material 201 and is provided to feed the film 201b from the raw material 201. The peeling assist roller 204 is provided between the feed roller 202 and the transport roller 203 and is provided to assist in peeling the film 201b from the raw material 201. This peeling assist roller 204 is positioned to guide the film 201b on the opposite side from the shaft 201a with respect to the tangential direction of the contact point where the raw material 201 and the feed roller 202 come into contact. As a result, the film 201b is peeled from the raw material 201 at the contact point where the raw material 201 and the feed roller 202 come into contact. Furthermore, the feed roller 202 and the peeling assist roller 204 are configured to rotate according to the diameter of the raw material 201. This ensures that even if the diameter of the raw material 201 changes, the path length of the film 201b between the feed roller 202 and the peeling assist roller 204, and the path length of the film 201b between the peeling assist roller 204 and the conveying roller 203 (the conveying roller 203 located furthest upstream), do not change. The conveying roller 203 has the function of conveying the film 201b fed from the raw material 201 to the winding device 100.

[0028] The winding device 100 is a surface winding type, and is configured such that the winding core 150 is carried along by the rotation of the drum 1, thereby winding the film 201b onto the winding core 150. Furthermore, the winding device 100 is configured to replace the winding core 150 when a predetermined length (for example, 10 to 50 m) of film 201b has been wound onto the winding core 150. Specifically, as shown in Figure 2, the winding device 100 comprises a drum 1, a turret mechanism 2, a cutting mechanism 3 (see Figure 4), a pinch roller 4, and a winding core supply unit 5.

[0029] The drum 1 is driven and rotated in the R1 direction by a motor (not shown) to feed the film 201b supplied from the raw material 201 to the winding core 150, and to rotate the winding core 150 to wind the film 201b. Further details of the drum 1 will be described later.

[0030] The turret mechanism 2 is positioned opposite the drum 1 in the axial direction (X1 and X2 directions) and is configured to rotate (swivel) in 45-degree increments in the R1 direction by a motor (not shown). The rotation axis of the turret mechanism 2 is located coaxially with the drum 1.

[0031] Multiple chuck mechanisms 21 are provided on the outer circumference of the turret mechanism 2 at predetermined intervals in the circumferential direction. In this embodiment, eight chuck mechanisms 21 are provided at 45-degree intervals. The turret mechanism 2 is configured to transport the chuck mechanisms 21 in the order of core supply position P1, winding position P2, and retracted position P3.

[0032] The winding position P2 is near the upper end of the drum 1 and is the position where the winding core (the first winding core in this invention) 150 winds the film 201b. The winding core supply position P1 is rotated 45 degrees from the winding position P2 in the opposite direction to the R1 direction and is the position where a new winding core (the second winding core in this invention) 150 is supplied. The retracted position P3 is rotated 45 degrees from the winding position P2 in the R1 direction and is the position where, when the winding core 150 is replaced (in this invention, during a rewinding operation in which the winding core that winds the film is replaced from the first winding core to the second winding core), the winding core (first winding core) 150 that was located at the winding position P2 is retracted from the winding position P2 in order to transport the new winding core (second winding core) 150 to the winding position P2.

[0033] The chuck mechanism 21 is configured to grip a new core 150, wind the film 201b onto the gripped core 150, and then release the core 150 (more specifically, the winding roll formed by winding the film 201b onto the core 150) after the film 201b has been wound onto it, thereby releasing it from the winding device 100. Specifically, the chuck mechanism 21 receives a new core 150 at the core supply position P1 and is transported to the winding position P2 along with the new core 150. Then, at the winding position P2, when a preset length of film 201b has been wound onto the core 150, the chuck mechanism 21 is transported to the retracted position P3 along with the core 150. After that, the chuck mechanism 21 releases the core 150 (winding roll) with the film 201b wound onto it from the winding device 100. Furthermore, the winding of film 201b onto a single 150-unit core is completed in a short period of time, approximately a few seconds.

[0034] Each chuck mechanism 21 includes a pivot shaft 21a, an arm 21b that can rotate (oscillate) around the pivot shaft 21a, and a holding member 21c provided at the tip of the arm 21b. The holding member 21c is configured to hold the axial end of the winding core 150 and to be rotatable relative to the arm 21b.

[0035] Furthermore, the chuck mechanism 21 is provided with a biasing member (not shown) that biases the arm 21b inward (towards the drum 1). The biasing member is, for example, a tension coil spring. The chuck mechanism 21 is configured such that, when it is in the winding position P2, the biasing force of the biasing member brings the winding core 150 to contact the outer circumferential surface of the drum 1, and when it is in any other position, it moves the tip of the arm 21b away from the outer circumferential surface of the drum 1 against the biasing force of the biasing member. As a result, the winding core 150 in the winding position P2 is in contact with the outer circumferential surface of the drum 1 via the film 201b, and the winding core 150 and the holding member 21c that holds the winding core 150 are driven to rotate in accordance with the rotation of the drum 1.

[0036] The cutting mechanism 3 is located inside the drum 1 and is configured to cut the film 201b when the winding core 150 is replaced. The cutting blade 33 of this cutting mechanism 3 (see Figure 4) protrudes from the outer surface of the drum 1 between the winding core supply position P1 and the winding position P2. Further details of the cutting mechanism 3 will be described later.

[0037] The pinch roller 4 is provided to press the film 201b, which is unwound from the raw material roll 201, against the drum 1. The core supply unit 5 is configured to supply a new core 150 to the core supply position P1. The core 150 is, for example, a cylindrical paper tube.

[0038] -Operation- Next, the operation of the rewinding device 200 according to this embodiment will be described with reference to Figures 1 to 4.

[0039] First, as shown in Figure 2, the chuck mechanism 21 located at the winding position P2 holds the winding core 150. The winding core 150 at the winding position P2 is biased toward the drum 1, and the winding core 150 at the winding position P2 is in contact with the outer surface of the drum 1 via the film 201b. At the winding core supply position P1, the chuck mechanism 21 holds a new winding core 150, and the held winding core 150 is separated from the drum 1.

[0040] Then, as shown in Figure 1, the film 201b is fed out from the roll 201 by the feed roller 202. The film 201b fed out from the roll 201 is then conveyed to the winding device 100 by the peeling assist roller 204 and the conveying roller 203.

[0041] At this time, as shown in Figure 2, the drum 1 is driven and rotated in the R1 direction by a motor (not shown), and the film 201b is fed to the winding core 150 at the winding position P2. Then, the winding core 150 at the winding position P2 is driven and rotated by the rotation of the drum 1, so that the film 201b is wound onto the winding core 150 at the winding position P2. The rotational speed (surface speed) of the drum 1 is set to a preset winding speed (for example, 600 m / min).

[0042] Subsequently, as shown in Figure 3, when a film 201b of a predetermined length has been wound onto the core 150 at the winding position P2, the core 150 replacement operation (rewinding operation) is initiated. When the core 150 is replaced, the drum 1 is first decelerated, and the rotation speed of the drum 1 is set to a replacement speed that is lower than the winding speed. This replacement speed is faster than conventional speeds, and to achieve this high speed, a retraction mechanism 35 (see Figure 5) and winding promotion means 50 (see Figures 15 to 17) are provided, which will be described later. In addition, by providing these retraction mechanisms 35 and winding promotion means 50, it may not be necessary to decelerate the rotation of the drum 1.

[0043] After the film 201b of a preset length is wound onto the winding core 150 at the winding position P2, the turret mechanism 2 is rotated 45 degrees in the R1 direction. As a result, as shown in Figure 4, the winding core 150 that was located at the winding position P2 is moved to the retracted position P3, and a new winding core 150 that was located at the winding core supply position P1 is moved to the winding position P2.

[0044] At this time, the new core 150 is gripped by the chuck mechanism 21, which has been moved to the core supply position P1. Also, the core 150, which has been moved to the winding position P2, is biased towards the drum 1.

[0045] Next, the cutting blade 33 of the cutting mechanism 3 protrudes from the outer surface of the drum 1, cutting the film 201b between the core supply position P1 and the winding position P2. Then, the cut end (one of the cut ends; hereinafter sometimes referred to as the winding end) 201d on the core 150 side at the retracted position P3 is wound onto the core 150 (winding roll) at the retracted position P3. In addition, air (compressed air) is blown onto the cut end (the other of the cut ends; hereinafter sometimes referred to as the winding start end) 201c on the raw material 201 side, causing that cut end (winding start end) 201c to be wound onto the new core 150 located at the winding position P2. The configuration (winding promotion means 50) and operation for blowing this compressed air will be described later. As a result, a predetermined length of film 201b is wound onto the retracted core 150 at position P3, and the cut film 201b is wound onto the new core 150 at position P2.

[0046] Subsequently, as the drum 1 is accelerated to the winding speed, the winding core 150, with the film 201b now fully wound, is released from the winding device 100, and the winding core 150 replacement operation is completed.

[0047] By repeatedly performing the above operations, it is possible to rewind the film 201b of the raw material 201 onto the winding core 150, and to continuously produce winding cores 150 with a predetermined length of film 201b wound onto them.

[0048] -Details of the drum and cutting mechanism- Next, the drum 1 and cutting mechanism 3 in the winding device 100 of this embodiment will be described with reference to Figures 5 and 6. Figure 5 is a view of the inside of the drum 1 from one side in the axial direction (along the X1 direction), and Figure 6 is a view of the inside of the drum 1 from the other side in the axial direction (along the X2 direction). Since the basic configuration of the drum 1 and cutting mechanism 3 is the same as that of Patent Document 1, in the following description, the illustration of some of the components of the drum 1 and cutting mechanism 3 will be omitted, and the description of those components will be simplified.

[0049] The winding device 100 of this embodiment includes a frame (not shown) that supports the drum 1 and the turret mechanism 2 so that they can rotate relative to each other. This frame is provided on one side (X2 direction side) and the other side (X1 direction side) of the drum 1 in the axial direction. Each frame has a cylindrical portion that extends inward, and the turret mechanism 2 is rotatably mounted on the outer circumference of this cylindrical portion. In other words, the turret mechanism 2 is provided between the frames in the axial direction.

[0050] The drum 1 includes a rotating shaft 11, main body plates 12a and 12b, and a cylindrical member 13.

[0051] The rotating shaft 11 is formed to extend in the axial direction, with both ends rotatably supported inside the cylindrical portion. Main body plates 12a and 12b are attached to this rotating shaft 11 so as not to rotate relative to each other, and a motor (not shown) is connected to it. The main body plates 12a and 12b are formed in a substantially disc shape, with the rotating shaft 11 positioned in their center. The main body plates 12a and 12b are positioned at a predetermined distance apart in the axial direction, with main body plate 12a on one side in the axial direction and main body plate 12b on the other side. A cylindrical member 13 is attached to the outer circumference of the main body plates 12a and 12b so as not to rotate relative to each other. Therefore, the main body plates 12a and 12b and a part of the rotating shaft 11 are positioned inside the cylindrical member 13. The cylindrical member 13 is positioned between a pair of turret mechanisms 2 in the axial direction. The outer surface of the cylindrical member 13 is the outer surface of the drum 1.

[0052] The cutting mechanism 3 includes link mechanisms 31a and 31b pivotably mounted on the drum 1, biasing members 32a and 32b that bias the link mechanisms 31a and 31b to one side, cutting blades 33 provided on the link mechanisms 31a and 31b, a protruding mechanism 34 for moving the link mechanisms 31a and 31b to the other side, and a retraction mechanism 35 for moving the link mechanisms 31a and 31b to one side.

[0053] As shown in Figure 5, the link mechanism 31a is pivotably mounted on the main body plate 12a of the drum 1. This link mechanism 31a has a first arm 311a, a second arm 312a, and a third arm 313a, is formed in a U-shape, and is arranged around the rotation axis 11. One end of the first arm 311a is rotatably attached to the shaft portion 121a of the main body plate 12a. A pin 314a is provided at the other end of the first arm 311a, and one end of the second arm 312a is rotatably attached to the pin 314a. A pin 315a is provided at one end of the third arm 313a, and the other end of the second arm 312a is rotatably attached to the pin 315a. The other end of the third arm 313a is attached to a shaft 31c, and the shaft 31c is rotatably mounted on the main body plate 12a. Therefore, the link mechanism 31a is configured to swing on one side (away from the opening 13a of the drum 1) and the other side (approaching the opening 13a of the drum 1), with the shaft portion 121a and the shaft 31c as pivot points. The other end of the second arm 312a is formed in a T-shape and has an outer overhang and an inner overhang. Furthermore, the T-shaped base portion of the other end is curved to avoid interference with the cylinder (not shown) of the piston 353, which will be described later.

[0054] The biasing member 32a is, for example, a tension coil spring and has the function of biasing the link mechanism 31a to one side. One end of the biasing member 32a is attached to a mounting portion 122a formed on the main plate 12a, and the other end of the biasing member 32a is attached to an outer overhang at the other end of the second arm 312a. The biasing member 32a is also positioned on the outside of the second arm 312a.

[0055] As shown in Figure 6, the link mechanism 31b is pivotably mounted on the main body plate 12b of the drum 1. This link mechanism 31b has a first arm 311b, a second arm 312b, and a third arm 313b, is formed in a U-shape, and is arranged around the rotation axis 11. One end of the first arm 311b is rotatably attached to the shaft portion 121b of the main body plate 12b. A pin 314b is provided at the other end of the first arm 311b, and one end of the second arm 312b is rotatably attached to this pin 314b. A pin 315b is provided at one end of the third arm 313b, and the other end of the second arm 312b is rotatably attached to this pin 315b. The other end of the third arm 313b is attached to a shaft 31c, and the shaft 31c is rotatably mounted on the main body plate 12b. Therefore, the link mechanism 31b is configured to swing to one side and the other side with the shaft portion 121b and the shaft 31c as pivot points. The shaft 31c is rotatably mounted on the main body plates 12a and 12b, and the third arms 313a and 313b are attached to both ends, respectively. As a result, the link mechanisms 31a and 31b are connected by the shaft 31c, so that the link mechanisms 31a and 31b swing in a synchronous manner. The other end of the second arm 312b is formed in a T shape and has an outer overhang and an inner overhang. The T-shaped base portion of the other end is curved to correspond to the second arm 312a.

[0056] The biasing member 32b is, for example, a tension coil spring and has the function of biasing the link mechanism 31b to one side. One end of the biasing member 32b is attached to a mounting portion 122b formed on the main body plate 12b, and the other end of the biasing member 32b is attached to an outer overhang at the other end of the second arm 312b. The biasing member 32b is also positioned on the outside of the second arm 312b.

[0057] The cutting blade 33 is provided for cutting the film 201b (see Figure 4). As shown in Figures 5 and 6, the cutting blade 33 is formed to extend axially (in the X1 and X2 directions), with one end attached to the inner protrusion of the second arm 312a of the link mechanism 31a and the other end attached to the inner protrusion of the second arm 312b of the link mechanism 31b. The cutting blade 33 is positioned in an opening 13a formed in the cylindrical member 13 of the drum 1 and is configured to move back and forth relative to the outer circumferential surface of the drum 1. Specifically, the cutting blade 33 is positioned inside the drum 1 when the link mechanisms 31a and 31b are positioned on one side, and is configured to protrude from the outer circumferential surface of the drum 1 when the link mechanisms 31a and 31b are moved to the other side.

[0058] The protruding mechanism 34 is provided to move the link mechanisms 31a and 31b to the other side. That is, the protruding mechanism 34 is provided to make the cutting blade 33 protrude from the outer circumferential surface of the drum 1. As shown in Figure 6, the protruding mechanism 34 includes a cam member 341 rotatably mounted on the cylindrical part of the frame, a biasing member 342 that biases the cam member 341 to one side, a piston 343 provided on the drum 1, and a roller 344 rotatably mounted on the link mechanism 31b. Note that the cam member 341 and the biasing member 342 are not rotated together with the drum 1.

[0059] The cam member 341 is rotatably attached to the shaft portion 611b formed on the cylindrical portion. The shaft portion 611b is located near the rotation axis 11 and is formed to extend in the axial direction (X1 and X2 directions). The cam member 341 is formed in a semi-circular shape when viewed from the axial direction and is located on the upper side around the rotation axis 11. The cam member 341 also has a cam portion 341a located on one side of the shaft portion 611b (opposite to the R1 direction) and a lever portion 341b located on the other side of the shaft portion 611b (towards the R1 direction).

[0060] The biasing member 342 is, for example, a tension coil spring and has the function of biasing the cam member 341 to one side (the side in which the cam portion 341a approaches the rotation axis 11). One end of the biasing member 342 is attached to the mounting portion 612b formed on the cylindrical portion of the frame, and the other end of the biasing member 342 is attached to one side of the cam member 341 relative to the shaft portion 611b.

[0061] The piston 343 is provided to rotate the cam member 341. This piston 343 is housed in a cylinder (not shown) and is configured to be movable in the axial direction (X1 and X2 directions). The cylinder is attached to the main body plates 12a and 12b and has a biasing member inside. The biasing member is, for example, a compression coil spring and is configured to bias the piston 343 to one side (towards the X2 direction). The piston 343 is then configured to move to the other side (towards the X1 direction) against the biasing force of the biasing member by air supplied to the cylinder. In other words, the piston 343 is configured to be operated by air. The piston 343 also has a stopper portion 343c formed at one end (the end on the X2 direction side) and a roller 343d at the other end (the end on the X1 direction side).

[0062] When the piston 343 is positioned on one side (towards the X2 direction), as shown in Figure 5, the engaging portion 31d provided on the first arm 311a of the link mechanism 31a is engaged with the stopper portion 343c. In this case, the link mechanisms 31a and 31b are positioned on one side (the side farther from the opening 13a), and their movement to the other side (the side closer to the opening 13a) is restricted by the stopper portion 343c. In this state, the first arm 311a of the link mechanism 31a is engaged with a rubber stopper portion 123a provided on the main plate 12a. Also, as shown in Figure 6, the first arm 311b of the link mechanism 31b is engaged with a rubber stopper portion 123b provided on the main plate 12b. Therefore, the movement of the link mechanisms 31a and 31b to one side is restricted by the stopper portions 123a and 123b. Furthermore, at this time, the roller 343d (see Figure 6) is positioned inside the lever portion 341b in the axial direction, so as not to come into contact with the lever portion 341b.

[0063] Furthermore, when the piston 343 is moved to the other side (towards the X1 direction), the engagement between the stopper portion 343c and the engaging portion 31d is released, and the link mechanism 31a and 31b become movable to the other side. Also, the roller 343d of the piston 343 is positioned in the axial direction to correspond with the lever portion 341b of the cam member 341. Therefore, when the drum 1 is rotated in the R1 direction from the state shown in Figure 6, the roller 343d comes into contact with the lever portion 341b, and the cam member 341 rotates against the biasing force of the biasing member 342, the cam portion 341a appears in the rotational trajectory of the roller 344.

[0064] The roller 344 is configured to ride up onto the cam portion 341a when it appears in the rotational trajectory. This roller 344 is provided on the third arm 313b, which is located on the opening 13a side with respect to the rotation axis 11. The roller 344 is also positioned in the axial direction to correspond to the cam portion 341a. When the roller 344 rides up onto the cam portion 341a, the third arm 313b is pushed radially outward, causing the link mechanisms 31a and 31b to move to the other side. When the cam member 341 is located on one side (when the cam member 341 is not rotating), the cam portion 341a is positioned inside the rotational trajectory of the roller 344.

[0065] The retraction mechanism 35 is provided to move the link mechanisms 31a and 31b to one side. That is, the retraction mechanism 35 is provided to retract the protruding cutting blade 33 into the drum 1. As shown in Figure 5, the retraction mechanism 35 includes a cam member 351 rotatably mounted on the cylindrical part of the frame, a biasing member 352 that biases the cam member 351 to one side, a piston 353 provided on the drum 1, and a roller 354 rotatably mounted on the link mechanism 31a. Note that the cam member 351 and the biasing member 352 are not rotated together with the drum 1.

[0066] The cam member 351 is rotatably attached to the shaft portion 611a formed on the cylindrical portion. The shaft portion 611a is located near the rotation axis 11 and is formed to extend in the axial direction (X1 and X2 directions). The cam member 351 is formed in a semi-circular shape when viewed from the axial direction and is located on the lower side around the rotation axis 11. The cam member 351 also has a cam portion 351a located on one side of the shaft portion 611a (opposite to the R1 direction) and a lever portion 351b located on the other side of the shaft portion 611a (towards the R1 direction).

[0067] The biasing member 352 is, for example, a tension coil spring and has the function of biasing the cam member 351 to one side (the side in which the cam portion 351a approaches the rotation axis 11). One end of the biasing member 352 is attached to the mounting portion 612a formed in the cylindrical portion of the frame, and the other end of the biasing member 352 is attached to one side of the cam member 351 relative to the shaft portion 611a.

[0068] The piston 353 is provided to rotate the cam member 351. This piston 353 is housed in a cylinder (not shown) and is configured to be movable in the axial direction (X1 and X2 directions). The cylinder is attached to the main body plates 12a and 12b and has a biasing member inside. The biasing member is, for example, a compression coil spring and is configured to bias the piston 353 to the other side (towards the X1 direction). The piston 353 is connected to the piston 343 via a connecting member (not shown). This connecting member is rotatably mounted on the rotating shaft 11, with one end connected to the piston 343 and the other end connected to the piston 353. As a result, when the piston 343 moves to the other side (towards the X1 direction), the piston 353 is configured to move to one side (towards the X2 direction) against the biasing force of the biasing member. In other words, the piston 353 moves in conjunction with the piston 343 and moves in the opposite direction to the direction of movement of the piston 343. Furthermore, the piston 353 is provided with a roller 353c at one end (the end on the X2 direction side).

[0069] When the piston 353 is positioned on the other side (towards X1), the roller 353c of the piston 353 is positioned inside the lever portion 351b of the cam member 351 in the axial direction, so as not to come into contact with the lever portion 351b. When the piston 353 is moved to one side (towards X2), the roller 353c is positioned in a location corresponding to the lever portion 351b in the axial direction. Therefore, when the drum 1 is rotated in the R1 direction from the state shown in Figure 5, the roller 353c comes into contact with the lever portion 351b, and the cam member 351 rotates against the biasing force of the biasing member 352, the cam portion 351a appears in the rotational trajectory of the roller 354.

[0070] The roller 354 is configured to ride up onto the cam portion 351a when it appears in the rotational trajectory. This roller 354 is provided on the first arm 311a, which is located on the opposite side of the opening 13a from the rotation axis 11. The roller 354 is also positioned in the axial direction to correspond to the cam portion 351a. When the roller 354 rides up onto the cam portion 351a, the first arm 311a is pushed radially outward, causing the link mechanism 31a and 31b to move to one side. When the cam member 351 is located on one side (when the cam member 351 is not rotating), the cam portion 351a is positioned inside the rotational trajectory of the roller 354.

[0071] - Operation of the cutting mechanism - Next, with reference to Figures 5 to 14, the operation of the cutting mechanism 3 of the winding device 100 in this embodiment will be described.

[0072] First, when the film 201b is not cut by the cutting blade 33, the piston 343 of the projection mechanism 34 and the piston 353 of the retraction mechanism 35 are in a non-operating state, as shown in Figures 5 and 6. Specifically, the piston 343 is positioned on one side (X2 direction side) and the piston 353 is positioned on the other side (X1 direction side). At this time, as shown in Figure 5, the engagement portion 31d of the link mechanism 31a is engaged with the stopper portion 343c of the piston 343, and the link mechanisms 31a and 31b are positioned on one side (the side farther from the opening 13a), restricting their movement to the other side (the side closer to the opening 13a). As a result, the cutting blade 33 is positioned inside the drum 1. The restriction of the movement of the link mechanisms 31a and 31b to one side is performed by the stopper portions 123a and 123b.

[0073] In this case, the roller 343d of the piston 343 is positioned on the inside (X2 direction side) of the lever portion 341b of the cam member 341. Therefore, the roller 343d of the piston 343, which rotates with the drum 1, does not act on the lever portion 341b. As a result, the cam portion 341a of the cam member 341 is positioned on the inside of the rotational trajectory of the roller 344 provided on the link mechanism 31b, so the cam portion 341a does not act on the roller 344, which rotates with the drum 1.

[0074] Furthermore, the roller 353c of the piston 353 is positioned on the inside (X1 direction side) of the lever portion 351b of the cam member 351. Therefore, the roller 353c of the piston 353, which rotates with the drum 1, does not act on the lever portion 351b. As a result, the cam portion 351a of the cam member 351 is positioned on the inside of the rotational trajectory of the roller 354 provided on the link mechanism 31a, so the cam portion 351a does not act on the roller 354, which rotates with the drum 1.

[0075] Therefore, the drum 1 rotates with the cutting blade 33 retracted inside the drum 1.

[0076] When the film 201b is cut by the cutting blade 33, the pistons 343 and 353 are operated in advance before the cutting blade 33 reaches the core supply position P1. Specifically, the air supplied to the cylinder of the projection mechanism 34 moves the piston 343 to the other side (towards X1), and the piston 353 moves to the one side (towards X2) along with the piston 343. This releases the engagement between the stopper portion 343c and the engaging portion 31d of the piston 343, allowing the link mechanisms 31a and 31b to move to the other side.

[0077] Furthermore, the roller 343d of piston 343 is positioned in the axial direction to correspond to the lever portion 341b, and the roller 353c of piston 353 is positioned in the axial direction to correspond to the lever portion 351b. As a result, when drum 1 is rotated in the R1 direction and the cutting blade 33 reaches the core supply position P1, as shown in Figure 7, the roller 353c, which rotates with drum 1, comes into contact with the lever portion 351b of cam member 351, and cam member 351 begins to rotate against the biasing force of biasing member 352. Also, as shown in Figure 8, the roller 343d, which rotates with drum 1, comes into contact with the lever portion 341b of cam member 341, and cam member 341 rotates against the biasing force of biasing member 342. As a result, the cam portion 341a of cam member 341 is moved radially outward, and the cam portion 341a appears in the rotational trajectory of roller 344, so that roller 344 rides on the cam portion 341a. As a result, the link mechanisms 31a and 31b are moved to the other side against the biasing force of the biasing members 32a and 32b, and the cutting blade 33 begins to protrude.

[0078] Then, when the drum 1 is rotated approximately 25 degrees in the R1 direction, the cam member 351 is further rotated by the roller 353c, as shown in Figure 9, and the cam member 341 is further rotated by the roller 343d, as shown in Figure 10. Then, the roller 344 rides up onto the peak of the cam portion 341a, the link mechanisms 31a and 31b move to the other side, and the cutting blade 33 is in its most protruding state. In this way, the film 201b is cut by the cutting blade 33 protruding from the outer surface of the drum 1. At this time, as shown in Figure 9, the cam portion 351a of the cam member 351 is moved radially outward, and the cam portion 351a appears in the rotational trajectory of the roller 354, and the state is just before the cam portion 351a acts on the roller 354.

[0079] Next, when the drum 1 is rotated approximately 10 degrees in the R1 direction, the roller 354 rides onto the cam portion 351a, as shown in Figure 11, and the link mechanisms 31a and 31b are moved to one side. As a result, the cutting blade 33, which protrudes from the outer surface through the opening 13a, is pulled inward. At this time, as shown in Figure 12, the roller 344 of the protruding mechanism portion 34 has moved over the cam portion 341a.

[0080] Subsequently, when the drum 1 is rotated approximately 10 degrees in the R1 direction and the cutting blade 33 reaches the winding position P2, the roller 354 rides up onto the peak of the cam portion 351a, as shown in Figure 13, and the link mechanisms 31a and 31b are moved to one side. As a result, the cutting blade 33 is retracted into the drum 1. At this time, the link mechanism 31a is pressed against the stopper portion 123a, and the link mechanism 31b is pressed against the stopper portion 123b (see Figure 14). In this state, the pistons 343 and 353 are switched to a non-operating state, and the engaging portion 31d of the link mechanism 31a engages with the stopper portion 343c of the piston 343.

[0081] As described above, in the cutting mechanism 3, the film 201b is cut by a continuous protruding movement (movement radially outward) and retraction movement (movement radially inward) of the cutting blade 33. This protruding and retracting movement is configured to occur between the core supply position P1 and the winding position P2. The protruding movement is performed by the roller 344 riding onto the cam portion 341a, causing the link mechanisms 31a and 31b to move to the other side. The retracting movement is performed by the roller 354 riding onto the cam portion 351a, causing the link mechanisms 31a and 31b to move to one side. That is, the roller 354 rides onto the cam portion 351a after the roller 344 has ridden onto the cam portion 341a.

[0082] -Methods for promoting wrapping- A key feature of this embodiment is that, during the rewinding operation in which the winding core 150 that winds the film 201b is replaced, the film 201b is cut by the cutting blade 33, and the winding start end 201c, located on the upstream side in the rotational direction of the drum 1, is wound onto the winding core 150 to start winding. The embodiment includes a winding promotion means 50 to facilitate the winding of the winding start end 201c onto the winding core 150. Several embodiments of this winding promotion means 50 will be described below.

[0083] (First Embodiment) As described above, compressed air is blown onto the cut end (winding start end) 201c of the film 201b from the inside of the drum 1, causing the winding start end 201c to be wound onto the new winding core 150 located at the winding position P2. The features of this embodiment lie in the configuration for blowing the compressed air (winding promotion means 50) and its operation. Specifically, in this embodiment, the operation of a link mechanism 31b housed inside the drum 1 is used to activate a valve 53, which will be described later. The operation of this valve 53 causes compressed air to be blown onto the winding start end 201c at a predetermined timing. The specific configuration will be described below.

[0084] Figures 15 and 16 show the winding promotion means 50 according to this embodiment, and are views of the winding promotion means 50 from a direction along X2. Figure 15 shows the state in which the valve 53 constituting the winding promotion means 50 is opened and compressed air is blown onto the winding start end 201c (not shown in Figure 15) of the film 201b, and Figure 16 shows the state in which the valve 53 is closed and the blowing of compressed air is stopped. More specifically, Figure 15 shows the state in which the cutting blade 33 is retracted inside the drum 1 (the state shown in Figure 6) and the blowing of compressed air is performed, and Figure 16 shows the state in which the cutting blade 33 is protruding from the drum 1 (the state shown in Figure 10) and the blowing of compressed air is stopped. Figure 17 is a view from arrow A in Figure 15.

[0085] As shown in these figures, the winding promotion means 50 in this embodiment includes an operating arm 51, a cam member 52, and a valve 53.

[0086] The actuating arm 51 has a boss portion 51a on one end in the longitudinal direction and a sector gear 51b on the other end. The shaft 31c is inserted into the boss portion 51a so as not to rotate relative to it. Therefore, the actuating arm 51 can swing in conjunction with the rotation of the shaft 31c (rotation accompanying the operation of the link mechanism 31b). The other end of the third arm 313b (shown by dashed lines in Figures 15 and 16) is attached to the shaft 31c, so the actuating arm 51 swings in conjunction with the third arm 313b. In this embodiment, the actuating arm 51 is a separate part from the third arm 313b, but they may be configured as an integrated unit. That is, the sector gear 51b may be integrally provided with the third arm 313b.

[0087] As shown in Figure 17, a pair of frame members 54a and 54b are provided inside the drum 1 at a predetermined distance from each other to rotatably support the cam member 52. The cam member 52 is rotatably supported by bearings BE and BE through openings provided in these frame members 54a and 54b, with the pivot point being in the axial direction (along the X1 and X2 directions).

[0088] The cam member 52 comprises a gear portion 52a with a gear formed on its outer circumference and a cam portion 52b extending in one direction perpendicular to the axial direction. As shown in Figure 17, the gear portion 52a and the cam portion 52b are arranged at positions offset in the axial direction. The gear portion 52a is located on the X2 direction side of the cam member 52 and meshes with the sector gear 51b of the operating arm 51. Therefore, when the operating arm 51 swings, the cam member 52 rotates in conjunction with it. The cam portion 52b is located on the X1 direction side of the cam member 52 and is the part for operating the piston 53b of the valve 53, which will be described later. It is provided to press the piston 53b in the state shown in Figure 16 (the state in which the valve 53 is closed).

[0089] The valve 53 is configured such that a piston 53b is housed within a cylinder 53a so as to be able to reciprocate (reciprocate in directions perpendicular to the X1 and X2 directions). The piston 53b is biased in a direction that causes it to protrude from the cylinder 53a by a biasing member 53e, for example, which is made of a compression coil spring. Specifically, a flange portion 53f is provided near the tip of the piston 53b, and the biasing member 53e is interposed in a compressed state between this flange portion 53f and the end face of a large-diameter portion 53g provided on the cylinder 53a, thereby biasing the piston 53b in a direction that causes it to protrude from the cylinder 53a.

[0090] In the piston 53b, a roller 53c is provided at the tip of the portion that protrudes from the cylinder 53a. This roller 53c is positioned to correspond to the cam portion 52b of the cam member 52. Therefore, depending on the rotational position of the cam member 52, the piston 53b can switch between a state in which it receives pressure from the cam portion 52b (the state shown in Figure 16) and a state in which it does not receive such pressure (the state shown in Figure 15).

[0091] The interior of the large-diameter portion 53g of the cylinder 53a is an air passage 53d (see Figures 15 and 17) that communicates with air supply paths 55a and 55b (shown as dashed lines in Figures 15 and 16) through which compressed air supplied from an air pump (not shown) flows. The air supply paths 55a and 55b consist of an upstream passage 55a extending from the air pump to the valve 53 and a downstream passage 55b extending from the valve 53 to the air outlet hole 14 of the drum 1.

[0092] A small-diameter section 53h is provided on a part of the piston 53b, which has a smaller outer diameter. The position of the small-diameter section 53h changes according to the sliding position of the piston 53b, thereby opening and closing the valve 53. In other words, as shown in Figure 16, when the piston 53b is pressed by the cam section 52b and retracted into the cylinder 53a against the biasing force from the biasing member 53e, the small-diameter section 53h is positioned away from the air passage 53d, causing the valve 53 to close. In this closed state, compressed air is not supplied to the downstream passage 55b, and compressed air is not blown out from the outer surface of the drum. In contrast, as shown in Figure 15, when the piston 53b is not pressed by the cam section 52b and is protruding from the cylinder 53a due to the biasing force from the biasing member 53e, the small-diameter section 53h communicates with a part of the air passage 53d, causing the valve 53 to open. In this open state, compressed air is supplied to the downstream passage 55b, and compressed air is blown out from the air outlet 14. This constitutes a valve, as defined in the present invention, that is connected to the protrusion mechanism and closes when the cutting blade is extended from the outer surface of the drum, stopping the blowing of air from the air outlet, and opens when the cutting blade is retracted into the drum, allowing air to be blown out from the air outlet.

[0093] Next, the operation of the winding promotion means 50 configured in this way will be described. When the film 201b is being wound onto the core 150, or during a rewinding operation, if the cutting blade 33 is positioned inside the drum 1 (before cutting the film 201b), the third arm 313b of the link mechanism 31b is in a position on one side, and as shown in Figure 15, the operating arm 51 is in a position rotated to the lower side in the figure. In this case, the valve 53 opens because the piston 53b does not receive pressure from the cam portion 52b, compressed air is supplied to the downstream passage 55b, and compressed air is blown out from the air blowing hole 14.

[0094] Furthermore, when the cutting blade 33 protrudes from the outer surface of the drum 1 during the rewinding operation, the third arm 313b of the link mechanism 31b is in the other position, and as shown in Figure 16, the operating arm 51 is rotated to the upper position in the figure. In this case, the piston 53b receives pressure from the cam portion 52b, causing the valve 53 to close, and compressed air is not supplied to the downstream passage 55b, so compressed air is not blown out from the outer surface of the drum. In other words, compressed air is not blown out toward the winding start end 201c at the time the film 201b is cut.

[0095] Then, as shown in Figure 15, when the cutting blade 33 is again positioned inside the drum 1, the valve 53 opens and compressed air is blown out from the air blow hole 14. In other words, compressed air is blown from the inside of the drum 1 towards the winding start end 201c, which moves toward the winding core 150 as the drum 1 rotates. As a result, the winding start end 201c is deformed to conform to the outer surface of the winding core 150 and wraps around the winding core 150 well. This makes it possible to perform the rewinding operation stably.

[0096] -Effects of the embodiment- In this embodiment, a winding promotion means 50 is provided to promote the winding of the winding start end 201c of the film 201b, which has been cut by the cutting blade 33, onto the winding core 150 during the rewinding operation to replace the winding core 150. In the prior art, considering that the winding of the winding start end onto the winding core was unstable, the rotation speed of the drum was rapidly reduced before the start of the rewinding operation in order to ensure that the rewinding operation could be performed stably. In contrast, in this embodiment, the winding promotion means 50 makes it possible to wind the winding start end 201c of the film 201b onto the winding core 150 well during the rewinding operation, making it possible to perform the rewinding operation stably. As a result, the reduction in the rotation speed of the drum 1 before the start of the rewinding operation can be reduced, or in some cases, it may be possible to eliminate the need to decelerate the rotation of the drum 1, thereby increasing the amount of film 201b wound per unit time and reducing the frequency of maintenance.

[0097] (Second Embodiment) Next, a second embodiment will be described. In the first embodiment described above, compressed air was blown from inside the drum 1 toward the winding start end 201c of the film 201b to promote the winding of the winding start end 201c onto the winding core 150. In this embodiment, instead, compressed air is flowed toward the winding start end 201c of the film 201b from the outside of the drum 1 to promote the winding of the winding start end 201c onto the winding core 150. The specific configuration will be described below.

[0098] Figure 18(a) is a view of the area around the winding core 150 located at the winding position P2 in this embodiment, viewed from one side in the axial direction (the side along the X2 direction), and Figure 18(b) is a view of a part of the airflow generating member 57, which will be described later, viewed from the direction of arrow B in Figure 18(a). As shown in these figures, the winding promotion means 50 according to this embodiment includes a winding promotion member 56 having an air passage 58 for promoting winding, and an airflow generating member 57 rotatably supported by the winding promotion member 56.

[0099] The winding promotion member 56 is positioned at the winding position P2 to cover substantially the entire upper part of the winding core 150 in the axial direction (X1 and X2 directions). Below the winding promotion member 56, there is a winding core housing section 56a and an airflow generating member housing section 56b.

[0100] The core housing section 56a has a shape in which the lower part of the winding promotion member 56 is recessed upward, and has a space inside for housing the core 150. The shape of the inner surface 56c of this core housing section 56a is a circular arc shape with a slightly larger diameter than the outer shape of the core 150 when viewed from the side (outer shape when viewed from the X2 direction). With the core 150 housed inside this core housing section 56a (with the core 150 in the winding position P2), the film 201b is wound onto the core 150 (in Figure 18, the winding start end 201c of the film 201b being wound onto the core 150 is shown by a dashed line).

[0101] The airflow generating member housing section 56b is located on the R1 direction side relative to the winding core housing section 56a, and has a shape in which the lower part of the winding promotion member 56 is recessed upward, and has a housing space inside for housing the airflow generating member 57. The shape of the inner surface 56d of this airflow generating member housing section 56b is a circular arc shape with a slightly larger diameter than the outer shape of the airflow generating member 57 when viewed from the side.

[0102] The airflow generating member 57 extends axially (in the X1 and X2 directions) and is housed in the airflow generating member housing 56b. It is supported by the winding promotion member 56 so as to be rotatable with the rotation center in the directions along the X1 and X2 directions. Furthermore, the airflow generating member 57 has wind turbine members 57a arranged at predetermined intervals along the directions along the X1 and X2 directions, with multiple blades 57b, 57b, ... arranged on it. As a result, when the wind turbine members 57a rotate in conjunction with the rotation of the airflow generating member 57, an airflow is generated around the wind turbine members 57a.

[0103] Furthermore, an air passage 58 is provided inside the winding-promoting member 56. The upstream end of this air passage 58 is connected to the air pump P, while the downstream end is branched into multiple sections. Specifically, it is branched to provide four air outlets 58a, 58b, 58c, and 58d, numbered from the first to the fourth.

[0104] The first air outlet 58a opens downward on the inner surface of the airflow generating member housing 56b and blows compressed air from above toward the blade 57b located on the right side of the airflow generating member 57 (downstream in the rotational direction of the drum 1). For this reason, the first air outlet 58a is provided at multiple locations facing each blade 57b along the axial direction (X1 and X2 directions).

[0105] The second air outlet 58b opens horizontally on the inner surface of the airflow generating member housing 56b and blows compressed air horizontally toward the vane 57b located on the lower side of the airflow generating member 57 as shown in the figure. For this reason, the second air outlet 58b is also provided at multiple locations facing each vane 57b along the axial direction (X1 and X2 directions).

[0106] As described above, the first air outlet 58a and the second air outlet 58b are provided. When compressed air is blown out from each air outlet 58a and 58b by the operation of the air pump P, the airflow generating member 57 rotates clockwise in the figure. As the drum 1 rotates, compressed air is blown onto the winding start end 201c of the film 201b that is passing between the drum 1 and the winding core 150 (film clamping position) (see arrow AI in the figure), thereby promoting the winding of the winding start end 201c onto the winding core 150.

[0107] In this embodiment, a first air outlet 58a and a second air outlet 58b are provided as compressed air outlets for rotating the airflow generating member 57, but a configuration in which only one of the air outlets is provided is also possible.

[0108] The third air outlet 58c opens diagonally downward in the upper part of the inner surface 56c of the core housing 56a, and blows compressed air in a direction tangential to the outer surface of the core 150. The direction of this compressed air blowing is toward the downstream side in the rotational direction of the core 150.

[0109] Furthermore, the fourth air outlet 58d opens horizontally on the downstream side of the rotational direction of the drum 1 on the inner surface 56c of the core housing 56a, and blows compressed air in a direction opposite to the outer surface of the core 150. These third air outlets 58c and the fourth air outlet 58d are also provided at multiple locations along the axial direction (X1 and X2 directions).

[0110] Furthermore, the timing of compressed air discharge from each of the air outlets 58a, 58b, 58c, and 58d in this embodiment is not particularly limited. In other words, compressed air may be discharged continuously, or, as in the first embodiment described above, compressed air may be discharged only when the cutting blade 33 is positioned inside the drum 1. In addition, during the rewinding operation, it is necessary to move the winding core 150 (winding roll) to the retracted position P3. At this time, the winding promotion member 56 is retracted from the winding core 150 together with the airflow generating member 57 (for example, by moving it upward), thereby enabling the winding core 150 to move to the retracted position P3.

[0111] In this embodiment as well, the starting end 201c of the film 201b can be properly wound onto the core 150 during the rewinding operation, enabling stable rewinding. As a result, the reduction in the rotational speed of the drum 1 before the start of the rewinding operation can be reduced, or in some cases, the need to decelerate the rotation of the drum 1 can be eliminated. This makes it possible to increase the amount of film 201b wound per unit time and reduce the frequency of maintenance.

[0112] (Other embodiments) As the winding promotion means 50 for promoting the winding start end 201c to wrap around the winding core 150, the following configuration can be adopted in place of, or in addition to, those of the embodiments described above.

[0113] First, the winding start end 201c is drawn up from the outer surface of the drum 1 by suction, promoting the winding start end 201c to wrap around the winding core 150. One example of a configuration to achieve this is to apply negative pressure to the space where the winding core 150 is housed in the winding core housing section 56a shown in Figure 18(a) above. For example, a negative pressure pump can be connected to the third air outlet 58c or the fourth air outlet 58d, and negative pressure can be applied to the space by operating this negative pressure pump. In this case, the airflow generating member 57 and the configuration for blowing compressed air from the first air outlet 58a and the second air outlet 58b may be used in combination or not. When such a configuration that applies negative pressure is adopted, the winding start end 201c, which has passed the film clamping position between the drum 1 and the winding core 150, can be detached from the outer surface of the drum 1 by the negative pressure acting in the internal space of the winding core housing 56a and wound onto the winding core 150 properly, thereby enabling stable rewinding operations.

[0114] Another approach is to charge the winding core 150 with static electricity, thereby using electrostatic force to wind the winding start end 201c around the winding core 150. One example of a configuration to achieve this is to place a well-known charging device (for example, a charging device utilizing corona discharge) at the winding position P2, and charge the winding core 150, which has moved to this winding position P2, with static electricity.

[0115] Another configuration involves spraying a liquid (e.g., water) onto the winding core 150 as it moves to the winding position P2, thereby causing the winding start end 201c to wrap around the winding core 150 due to the surface tension of the liquid. One example of a configuration to achieve this is to connect a liquid supply device to the third air outlet 58c and the fourth air outlet 58d of the winding promotion member 56 shown in Figure 18(a) above, thereby spraying a liquid (e.g., a mist of liquid) along with compressed air onto the surface of the winding core 150.

[0116] With these configurations, as in the embodiments described above, the starting end 201c of the film 201b can be properly wound onto the core 150 during the rewinding operation, enabling stable rewinding. As a result, the reduction in the rotational speed of the drum 1 before the start of the rewinding operation can be reduced, or in some cases, the need to decelerate the rotation of the drum 1 can be eliminated. This makes it possible to increase the amount of film 201b wound per unit time and reduce the frequency of maintenance. Furthermore, the embodiments disclosed herein are illustrative in all respects and do not constitute a limiting interpretation. Therefore, the technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the claims. The technical scope of the present invention also includes all modifications within the meaning and scope of equivalence to the claims.

[0117] For example, in the first embodiment, the operation of the link mechanism 31b (a link mechanism constituting the protruding mechanism 34) housed inside the drum 1 was used to activate the valve 53 so that compressed air was blown onto the winding start end 201c. The present invention is not limited to this, and the operation of the link mechanism 31a (a link mechanism constituting the retraction mechanism 35) housed inside the drum 1 may also be used to activate the valve 53 so that compressed air is blown onto the winding start end 201c.

[0118] Furthermore, while each embodiment shows an example in which eight chuck mechanisms 21 are provided on the turret mechanism 2, the invention is not limited to this, and any number of chuck mechanisms provided on the turret mechanism is acceptable.

[0119] Furthermore, while each embodiment shows an example in which the piston 343 of the projection mechanism 34 is driven by air and the piston 353 of the retraction mechanism 35 is linked to the piston 343 of the projection mechanism 34, the embodiment is not limited to this, and the piston of the retraction mechanism may be driven by air and the piston of the projection mechanism may be linked to the piston of the retraction mechanism. [Industrial applicability]

[0120] The present invention is applicable to surface winding type winding devices. [Explanation of symbols]

[0121] 1 Drum 2 Turret mechanism 14 air vents 33 Cutting blade 34 Projection mechanism section 35 Evacuation mechanism section 50 Wrapping promotion means 53 Valves 55a, 55b Air supply path 56 Wrapping-promoting member 56a Core housing section 57 Airflow generating component 57b Feather 100 Winding device 150 cores 201b film 201c Winding start 201d End of winding

Claims

1. A winding device comprising a drum into which film is supplied, and a turret mechanism that presses a winding core against the drum, wherein the winding core is carried along by the rotation of the drum, thereby winding the film onto the winding core, and during a rewinding operation in which the winding core that winds the film is replaced from a first winding core to a second winding core, the film is cut by a cutting blade, and the winding end of each film end located downstream in the direction of drum rotation is wound onto a winding roll formed by winding the film onto the first winding core, and the winding start end located upstream in the direction of drum rotation is wound onto the second winding core to begin winding the film onto the second winding core, wherein the winding device is configured to start winding the film onto the second winding core, It is equipped with a winding promotion means for promoting the winding start end to wrap around the second core, The winding promotion means comprises an airflow generating member disposed downstream of the drum in the direction of rotation with respect to the film clamping position between the drum and the second winding core, and rotatable around a rotation axis parallel to the rotation axis of the drum, and an air passage. The winding device is characterized in that the airflow generating member is a wind turbine member having a plurality of blades, and compressed air is blown out from the air passage onto the blades, causing the wind turbine member to rotate in the opposite direction to the rotation direction of the drum, thereby generating an airflow that passes through the film clamping position and is directed toward the winding start end.

2. A winding device comprising a drum on which a film is supplied and a turret mechanism for pressing a winding core against the drum, wherein the winding core is carried along by the rotation of the drum and the film is wound onto the winding core, and during a rewinding operation in which the winding core on which the film is wound is replaced from a first winding core to a second winding core, the film is cut by a cutting blade, and the winding end of each film end located downstream in the direction of drum rotation is wound onto a winding roll formed by winding the film onto the first winding core, and the winding start end located upstream in the direction of drum rotation is wound onto the second winding core to start winding the film onto the second winding core, It is equipped with a winding promotion means for promoting the winding start end to wrap around the second core, The winding promotion means includes a winding promotion member disposed to surround the outer circumference of the second core, and the winding promotion member has a core housing portion having an inner surface that is an arc shape with a larger diameter than the outer shape of the second core, and a space is provided between the inner surface of the core housing portion and the second core. A negative pressure is acting on the aforementioned space. A winding device characterized in that the winding start end of the film cut by the cutting blade passes between the drum and the second winding core before reaching the space.

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