Web winding device

Abstract

A web winding device includes a plurality of guide rollers, an endless belt wound in a loop over the guide rollers, a bobbin rotated by the belt, a calender, a bobbin support shaft, and a guide mechanism. The bobbin support shaft is rotatably supported by a bearing on at least one side. The bobbin is fixed to the bobbin support shaft in a state where movement of the bobbin in the axial direction is limited by a limiting mechanism. The guide mechanism is coupled to at least one side of the bobbin support shaft. The guide mechanism limits the movement of the bobbin support shaft in the axial direction and guides movement of the bobbin support shaft in a direction orthogonal to the axial direction.

Description

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

[0002] Web winding methods include a winding process in which a web is wound onto a bobbin while being pressed (pressed) against the rollers. In this process, each time the web is wound onto the bobbin with one revolution, the web is compressed by receiving a load from the rollers twice. When it passes through the rollers, the compression of the web is released and it absorbs air. Thus, the web repeatedly absorbs and releases air, causing fibers to entangle between the layers. Therefore, when used in a combing machine, uniform peeling of the web may be hindered. In other words, lap formation may occur. In addition, the winding density of the web may become too low to allow a sufficient weight of the web to be wound onto the bobbin.The web refers to a layer of several fiber ribbons, usually 20 to 36 aligned fiber ribbons with a width of approximately 30 cm.

[0003] To compensate for the disadvantages described above, a winding device is proposed as in Fig. 10 and Fig. 11 (see GB 680 464 A). This winding device comprises an endless belt 51 wound in a loop over rollers 52, 53, 54, 55, 56, 57, 58. A pressure roller (pressure roller) 59 adjusts the tension of the belt 51. The roller 52 drives the belt 51. A spool 60 is arranged in a portion of the belt 51 formed as a loop between the rollers 52 and 53. In this state, the spool 60 winds a web L. As the web L is wound onto the spool 60, the rollers 52 to 58 are held in constant positions. As the amount of the web L wound on the spool 60 increases, the position of the pressure roller 59 is adjusted so that the belt 51 constantly applies the same pressing force (pressing force, pressing force) to the web L wound on the spool 60.

[0004] The roller 53 is supported at the distal end of the lever 61. As in Fig. 11, when the web L is wound onto the bobbin 60 to a full bobbin state, the lever 61 is pivoted clockwise as shown in Fig. 11. As a result, the roller 53 moves away from the roller 52 and to a position where the fully wound web is separated from the loop of the belt 51 and the fully wound web is removed. Thereafter, the lever 61 is pivoted to place the roller 53 in the winding position. When the roller 53 has returned to the winding position, a bobbin 60 is fed onto the belt 51 from a bobbin feed section 62 through the space between the rollers 52 and 53. When the roller 52 is driven after the roller 52 has returned to the winding position, the web L is wound onto the bobbin 60, as shown in Fig. 10 is shown.

[0005] In the web winding device disclosed in GB 680 464 A, the bobbin 60 is simply placed on the belt 51, and the web L is wound while being pressed toward the rollers 52, 53 by the belt 51. Therefore, when the web L is wound on the bobbin 60, the position of the bobbin 60 in the axial direction is not stabilized, and the web L cannot be wound on the bobbin 60 within a predetermined range in the axial direction of the bobbin 60.

[0006] To solve such a problem, a winding device for winding (winding) a web onto a bobbin, which is rotated in a fixed position by the circulation of an endless belt, is proposed (see JP H10-511632 A). In this winding device, as shown in Fig. 12, a web L is wound onto a spool 72 driven by a revolving endless belt 71. The belt 71 is tensioned by a tension adjusting device 73. The belt 71 has a loop 74 formed between two deflection rollers R1 and R2. The spool 72 is disposed within the loop 74 and is rotatable about a fixed axis 75. The spool 72 and the deflection rollers R1 and R2 are dimensioned and arranged with respect to one another such that the loop 74 surrounds the spool 72 with a minimum initial angular contact greater than 120° at the start of the winding process.

[0007] The belt 71 is further wound in a loop over the deflection rollers R3, R4, R5, which are different from the deflection rollers R1, R2. The deflection rollers R4 and R5 are arranged in positions where the belt 71 runs below the web roller 76 in a full bobbin state. The deflection roller R5 rotates in a fixed position, and the deflection roller R4 is moved by the tension adjusting device 73 between the position in the winding start state indicated by the double-dashed line in Fig. 12, and the position in the full bobbin state indicated by the solid line. The tension adjusting device 73 is connected to a control device 77 to generate a tension related to the diameter of the web roller 76.

[0008] As in Fig. As shown in Figure 13, the coil former 72 is mounted between two winding plates 78, 79. The winding plates 78, 79 have corresponding projections 80, 81. The winding plates 78, 79 are mounted on the coil former 72 with the projections 80, 81 fitting into the coil former 72.

[0009] The fiber ribbons that are the raw material for the web are cotton balls and elastic bodies that contain a large amount of air. Therefore, when a web is wound onto a bobbin, it is necessary to hold the web down to a certain extent or, on the other hand, to remove the air while winding the web. At this time, the web is pressed (pressed) on both sides in the thickness direction and expands in the width direction. In addition, after the web is wound, the web is repeatedly pressed down and released, so that air is absorbed and discharged. As a result, the web gradually expands in the width direction. To restrict or prevent such expansion, the device disclosed in JP H10-511632 A includes the winding plates (flanges) 78, 79 provided on the left and right sides of the bobbin 72.

[0010] However, when the winding plates (flanges) 78, 79 are provided, a gap (space) t is required between the belt 71 and each winding plate (flange) 78, 79, as shown in Fig. 13. The batting may protrude (project, protrude into) the gap t. Such protrusion can result in web defects. Web defects refer to curling, primarily on the hall belt.

[0011] In the device disclosed in JP H10-511632 A, the bobbin 72 is supported to rotate in the same position around the axis 72 from the start of winding to the full bobbin state. Therefore, for a considerable period of time from the start of winding, the web L tends to absorb air while being moved by the deflection roller R2 to the position where the web L is wound onto the bobbin 72. As a result, in the web L wound onto the bobbin 72, a portion of the web roller 76 close to the bobbin 72 contains a large amount of air. Therefore, when a portion of the web L containing a small amount of air is wound to the outside, the web L expands in the width direction and intertwines with the edges of a portion of the web L to be wound next time, and curling may occur on the hall belt.

[0012] Another known web winding device according to the prior art is shown in DE 197 20 825 A1. SUMMARY OF THE INVENTION

[0013] It is the object of the present invention to provide a web winding device that can stably wind the web in a predetermined position in the axial direction of the bobbin and can prevent the occurrence of lap formation when a web is wound on a bobbin.

[0014] The object of the present invention is achieved by a web winding device having the features of claim 1.

[0015] Advantageous developments of the present invention are defined in the dependent claims.

[0016] According to one advantage of the present invention, a web winding device is provided, including a plurality of guide rollers, an endless belt looped over the guide rollers, a bobbin rotated by the belt, and a calender. The web winding device is configured to wind (take up) a web compressed (pressed, compacted) by the calender, and further includes a bobbin support shaft and a guide mechanism. The bobbin support shaft is rotatably supported by a bearing on at least one side. The bobbin is fixed to the bobbin support shaft in a state where movement of the bobbin in an axial direction is restricted by a restriction mechanism. The guide mechanism is coupled to at least one side of the bobbin support shaft.The guide mechanism limits movement of the bobbin support shaft in the axial direction and guides movement of the bobbin support shaft in a direction orthogonal to the axial direction.

[0017] Further advantages, features and effects of the invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which the principles of the invention are illustrated by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention, together with its objects and advantages, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which: Fig. 1 is a schematic diagram of a winding device according to a first embodiment; Fig. 2 is a schematic sectional view along a line AA of Fig. 1; Fig. 3A is a front view showing a supported state of a bobbin support shaft; Fig. Figure 3B is a schematic sectional view taken along a line BB of Fig. 3A; Fig. 4 is a schematic sectional view along a line CC of Fig. 3A; Fig. 5 is a side view illustrating a plant; Fig. 6 is a schematic sectional view taken along a line DD of Fig. 5; Fig. 7 is a schematic diagram of a winding device according to a second embodiment; Fig. 8 is a schematic sectional view of Fig. 7; Fig. 9 is a schematic diagram of a winding device according to a third embodiment; Fig. 10 is a schematic sectional view showing a conventional winding device; Fig. 11 is a schematic sectional view of the conventional winding device in a state where winding has progressed; Fig. 12 is a schematic diagram of another conventional winding device; and Fig. Fig. 13 is a schematic sectional view showing the initial stage of forming a web roll in the apparatus shown in Fig. 12 is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment

[0019] A first embodiment of the present invention is described below with reference to Fig. 1 to 6.

[0020] As in Fig. 1, the web winding device comprises guide rollers 11 to 15, an endless belt 16 wound in a loop over the guide rollers 11 to 15, a bobbin 17 rotated by the belt 16, and a calender 18. The web winding device is designed to wind (rewind) the web 19 compressed by the calender 18.

[0021] The calender 18 has four rolls. Of the four rolls of the calender 18, the one roll with which the web 19 is last engaged is a last calender roll 18a. As shown in Fig. 2, the last calender roll 18a is provided to urge (press) the web 19 downwards by means of springs 20. As shown in Fig. 1, the other three rollers 18b are each designed to rotate while being urged toward the roller 18a or 18b on the front side by a spring 20. The front side refers to the side in the direction in which the web 19 is fed to the guide roller 11, that is, the left side as shown in Fig. 1 is shown.

[0022] Of the guide rollers 11 to 15, two guide rollers 11 and 12 are arranged such that, when the web 19 is wound, the movement path of a bobbin support shaft 21 coincides with a bisector (bisection line) of the line connecting the central axes of the guide rollers 11 and 12. The guide roller 11 is arranged at a position closest to the calender 18 among the guide rollers 11 to 15.

[0023] The two guide rollers 13, 14 are arranged below the guide rollers 11, 12. The guide rollers 13 and 14 are arranged in a position to guide the belt 16 such that the belt 16 passes through or is guided past a full spool body 22. The guide roller 13 is driven by a motor 23 and serves as a drive roller.

[0024] A first end of a lever 24 is rotatably supported around a drive shaft of the guide roller 13. The guide roller 12 is rotatably supported around a second end of the lever 24. The guide roller 12 is provided to move between a winding position indicated by the solid lines in Fig. 1, and a take-off position indicated by the double-dashed lines by a drive device (not shown), such as an air cylinder. That is, the movable guide roller 12 pivots between the winding position and the take-off position.

[0025] The guide roller 14 is arranged below the calender 18. The guide roller 14 can be moved by an air cylinder 25 between a winding start position P1, which is indicated by the solid line in Fig. 1, and a full spool position P2 and a withdrawal position P3. The full spool position P2 and the withdrawal position P3 are indicated by the double-dashed lines.

[0026] The guide roller 15 is arranged to contact the outer peripheral surface of the belt 16 at a position closer to the full spool 22 than the guide roller 14 arranged at the take-off position P3. As shown in Fig. 2, the width of the belt 16 is set to be greater than the width of the track 19.

[0027] As in Fig. 3A, Fig. 3B and Fig. 4, the web winding device comprises the bobbin support shaft 21, a guide mechanism 26 ( Fig. 3A and Fig. 3B) and a limiting mechanism 27 ( Fig. 4). The bobbin support shaft 21 fixes the bobbin 17. The guide mechanism 26 guides movement of the bobbin support shaft 21 in a direction orthogonal to the axial direction of the bobbin support shaft 21. The limiting mechanism 27 limits movement of the bobbin 17, which is supported by the bobbin support shaft 21, in the axial direction of the bobbin support shaft 21.

[0028] The guide mechanism 26 includes guide shafts 28, a slider 29, and bearings 30. In the present embodiment, the number of guide shafts 28 is two. The guide shafts 28 extend in a direction orthogonal to the axial direction of the spool support shaft 21. The slider 29 is supported to be movable along the guide shafts 28. Bearings 30 are provided in the slider 29 to rotatably support the spool support shaft 21. In the present embodiment, the spool support shaft 21 is coupled to the guide mechanism 23 only on one side. In other words, the spool support shaft 21 is supported on one side.

[0029] The slider 29 is held in a state where it presses the bobbin 17, which is fixed to the bobbin support shaft 21, against the guide rollers 11, 12 with the belt 16 interposed therebetween. When the web 19 is wound onto the bobbin 17, the slider 29 is moved downward as the winding diameter of the web 19 wound onto the track body 17 increases. That is, at the start of winding, the guide mechanism 26 holds the bobbin support shaft 21 in a position where the bobbin 17 is pressed against the two guide rollers 11, 12 by the belt 16. When the winding diameter of the web 19 wound on the bobbin 17 increases, the guide mechanism 26 guides a movement of the bobbin support shaft 21 such that the distances of the bobbin support shaft 21 from the guide rollers 11, 12 increase.The guide shafts 28 and the slider 29 limit (prevent) movement of the spool support shaft 21 in the axial direction.

[0030] The limiting mechanism 27 has elastic members 31 provided on the outer surface of the bobbin support shaft 21. As shown in Fig. 2, Fig. 3B and Fig. 4, the number of elastic members 31 in the present embodiment is six. At each of the ends in the longitudinal direction of the coil body 17, three elastic members 31 are provided at regular intervals in the circumferential direction, as shown in Fig. 3A. Accordingly, a total of six elastic members 31 are provided. Each elastic member 31 is provided to be able to contact the inner peripheral surface of the spool 17. The spool support shaft 21 has a passage 32 for supplying compressed air to positions corresponding to the elastic member 31. Then, compressed air is supplied from a duct 33 connected to the passage 32. When the compressed air is supplied to the passage 32, each elastic member 31 is kept in a state of pressing the spool 17. This prevents movement of the spool 17 in an axial direction of the spool support shaft 21. In a state where the compressed air is not supplied to the passage 32, the limitation of the movement of the spool 17 in the axial direction of the spool support shaft 21 by the elastic members 31 of the limiting mechanism 27 is released.

[0031] An operation of the web winding device configured as described above is described below.

[0032] Before starting winding, an empty bobbin 17 is attached (fixed, fixed) to the bobbin support shaft 21. When the bobbin 17 is fixed to the bobbin support shaft 21, a supply of compressed air to the passage 32 of the bobbin support shaft 21 is stopped, allowing the bobbin 17 to move along the bobbin support shaft 21. In this state, the bobbin 17 is attached to a predetermined position of the bobbin support shaft 21. Thereafter, the compressed air is supplied to the passage 32. The supply of compressed air to the passage 32 causes the elastic members 31 to press the bobbin 17, so that the bobbin 17 is maintained in a state where its movement in the axial direction of the bobbin support shaft 21 is limited.

[0033] Then, the air cylinder 25 is activated so that the guide roller 14 is arranged at the position indicated by the solid line in Fig. 1. The bobbin 17 is arranged at the winding start position, in which the bobbin 17 is urged (pressed) against the rollers 11, 12, with the belt 16 interposed therebetween. In this state, the motor 23 and the calender 18 are activated. The belt 16 is guided by the guide rollers 11 to 15 and in the direction of the arrows in Fig. 1. The guide roller 11 is rotated counterclockwise, as shown in Fig. 1. The spool body 17, over which a part of the belt 16 is guided in a loop, is rotated together with the spool body support shaft 21 in the clockwise direction, as shown in Fig. 1 is rotated.

[0034] The web 19 is compressed by the calender 18 to remove air. The web 19, from which the air has been removed, is moved while in contact with the surface of the belt 16 opposite the surface that contacts the guide roller 11 as it is wound in a loop over the guide roller 11. The web 19 is guided to the gap between the belt 16 and the outer surface of the bobbin 17 while in contact with the outer surface of the bobbin 17. After being guided to the gap between the belt 16 and the outer surface of the bobbin 17, the web 19 is wound onto the bobbin 17 while being pressed against the outer surface of the bobbin 17 by the belt 16 as the belt 16 moves.

[0035] As the winding diameter of the web 19 wound on the bobbin 17 increases, the bobbin support shaft 21 moves along the bisector of the line connecting the center axis of the guide roller 11 and the center axis of the guide roller 12. The winding operation is performed in a state where the web 19 wound on the bobbin 17 is constantly pressed against the rollers 11, 12 at the constant positions. While the belt receives an appropriate tension from the guide roller 14, the belt 16 is moved from the winding start position to the full bobbin position while pressing the web 19 (web L) wound on the bobbin 17, thereby responding to a change in the diameter of the web L wound on the bobbin 17. The area of ​​the web surface not pressed by the belt 16 is minimized and the same as that in the winding start state regardless of the winding diameter of the web L.

[0036] The conventional winding device described in JP H10-511632 A performs winding with the bobbin 72 remaining in the same position from the start of winding to the full bobbin state as in Fig. 12. Therefore,

[0037] Web L is exposed to air for a long distance until the web L to be wound onto the bobbin 72 at the start of winding is pressed against the deflection rollers R1, R2 by the belt 71. Therefore, after the web L is compressed by the calender to remove air, the web L is moved for a long distance in a state where air can be absorbed until the web L is wound onto the bobbin 72 and covered by the belt 71. The web, which is thick with air included, is wound onto the bobbin 72. Accordingly, flanges on the sides of the bobbin 72 are necessary to prevent the expansion of the edges of the web L.

[0038] In contrast, in the present embodiment, the web 19 is moved while being wound in a loop over the guide roller 11, enters the gap between the belt 16 and the outer surface of the bobbin 17, and is wound onto the bobbin 17 while being pressed (pressed) against the outer surface of the bobbin 17 by the belt 16. Therefore, after the web 19 is pressed (pressed) by the calender 18 and air is removed, the web 19 is moved a significantly smaller distance in a state capable of absorbing air until the web 19 is wound onto the bobbin 17 and covered by the belt 16, compared to the conventional device. The web 19 is thus wound onto the bobbin 17 with a small thickness.

[0039] The bobbin 17 is rotated in the winding direction together with the bobbin support shaft 21, while movement in the axial direction is limited by the bobbin support shaft 21 via the limiting mechanism 27, and is pressed against the guide rollers 11, 12 by the belt 16 with the web 19 provided therebetween. Therefore, even if no flanges are provided, the web 19 is wound onto a suitable position of the bobbin 17 without any difficulty.

[0040] In the usual winding device of Fig. 12 and Fig. 13, it is necessary that the force with which the belt 71 is pressed against the spool body 72 be absorbed by the support shaft of the spool body 72 until the web L wound on the spool body 72 is pressed against the deflection rollers R1 and R2 at the start of winding with the belt 71 interposed therebetween. Accordingly, the support shaft of the spool body 72 must have a strength sufficient to bear the pressing force applied by the belt 71.

[0041] In contrast, in the present embodiment, the surface of the bobbin 17 is pressed against the guide rollers 11, 12 from the start of winding, with the belt 17 interposed therebetween, or with the belt 16 and the web 19 wound on the bobbin 17 interposed therebetween. Therefore, the bobbin support shaft 21 is not required to bear the pressing force acting on the bobbin 17 from the belt 16.

[0042] As in Fig. As shown in Figure 5, when the winding progresses to the full bobbin state, the calender 18 and the motor 23 are stopped and the winding is completed. Then, the lever 24 supporting the guide roller 12 is moved to the take-off position indicated by the double-dotted lines in Fig. 1, and the guide roller 14 is moved to the pay-off position P3, which is closer to the guide roller 15 than the full bobbin position P2. In this state, a pay-off position is executed. After the pay-off position is completed, the bobbin 17 is mounted on the bobbin support shaft 21, and the rollers 12, 14 are moved to the winding start position. Then, the winding of the web 19 is restarted.

[0043] The present embodiment achieves the following advantages. (1) The web winding device includes guide rollers 11 to 15, an endless belt 16 wound in a loop over the guide rollers 11 to 15, a bobbin 17 rotated by the belt 16, and a calender 18. The web winding device is configured to wind (take up) the compressed web 19. The web winding device includes the bobbin support shaft 21 and the guide mechanism 26. The bobbin 17 is fixed to the bobbin support shaft 21, while movement in the axial direction of the bobbin 17 is prevented by the limiting mechanism 27. The bobbin support shaft 21 is rotatably supported by the bearings 30 on at least one side. The guide mechanism 26 is coupled to one side of the bobbin support shaft 21.The guide mechanism 26 limits movement of the bobbin support shaft 21 in the axial direction and guides movement of the bobbin support shaft 21 in a direction orthogonal to the axial direction.

[0044] With this configuration, the bobbin 17 has no flanges and starts winding from a state where the bobbin 17 is pressed against the guide rollers 11, 12 with the belt 16 interposed therebetween. Therefore, unlike the conventional device in which the web is wound onto the bobbin having flanges with the belt interposed therebetween, the compressed web 19 does not enter between a belt and flanges. Thus, no curling occurs at the edges of the web 19.

[0045] After the web passes the guide roller 11, the area of ​​the web 19 not pressed by the belt 16 is minimized regardless of the winding diameter of the web. This reduces the amount of air absorbed by the web 19 wound on the bobbin 17, and thus eliminates the need to remove air from the web 19 wound on the bobbin 17 by means of a pressing force. Accordingly, deterioration in the quality (winding) of the web 19 due to expansion in the width direction of the web 19 is prevented. Furthermore, the winding of the web 19 is carried out by preventing (limiting) movement of the bobbin 17 in the axial direction by the bobbin support shaft 21.Thus, unlike the device disclosed in GB 680 464 A, the web 19 is stably wound onto the bobbin 17 within a predetermined range in the axial direction of the bobbin 17. This allows the web 19 to be stably wound to a predetermined position in the axial direction of the bobbin 17 while preventing coiling.

[0046] Since the expansion of the web 19 due to absorbed air is minimal after the web 19 is wound onto the spool 17, the tension of the belt 16 can be set to a small value. This increases the service life of the belt 16.

[0047] Furthermore, the outer surface of the bobbin 17 is pressed against the guide rollers 11, 12 with the belt 16 interposed therebetween, or with the belt 16 and the web 19 wound on the bobbin 17 interposed therebetween. Therefore, the bobbin support shaft 21 does not have to bear the pressing force acting on the bobbin 17 with the belt 16 interposed therebetween. This allows the strength of the bobbin support shaft 21 to be lower than that of the winding device disclosed in JP H10-511632 A.

[0048] (2) The bobbin support shaft 21 is coupled to the guide mechanism 26 only on one side. However, the bobbin support shaft 21 may be supported on both sides. In the case of one-side support, the attachment and detachment of the bobbin 17 to and from the bobbin support shaft 21 is simplified compared to the case of both-side support.

[0049] (3) The guide mechanism 26 includes the guide shafts 28 and the bearings 30. The guide shafts 28 extend in a direction orthogonal to the axial direction of the bobbin support shaft 21. The bearings 30 support the bobbin support shaft 21 so as to be rotatable relative to the slider 29. With this configuration, movement of the bobbin support shaft 21 in the axial direction is prevented (limited) and movement in a direction orthogonal to the axial direction is guided by a simple structure.

[0050] (4) The limiting mechanism 27 includes the elastic members 31 and the passage 32. Each elastic member 31 is provided on the outer peripheral surface of the spool support shaft 21. The passage 32 is provided in the spool support shaft 21 and can supply compressed air to positions corresponding to the elastic members 31. When the compressed air is supplied to the passage 32, each elastic member 31 is kept in a state of pressing the spool 17. This limits (prevents) movement of the spool 17 in the axial direction of the spool support shaft 21. Therefore, when no compressed air is supplied to the passage 32, the limitation of the movement of the spool 17 in the axial direction of the spool support shaft 21 by the elastic members 31 of the limiting mechanism 27 is released.This makes it possible for the coil former 17 to be easily mounted onto the coil former support shaft 21 or to be easily removed therefrom. Second embodiment

[0051] A second embodiment is described below with reference to Fig. 7 and Fig. 8 described.

[0052] In the web winding device of this embodiment, the relationship between the guide roller 11 and the calender 18 differs from that in the first embodiment, and the other configuration is basically the same as that of the first embodiment. Similar or identical reference numerals denote those components that are similar or identical to the corresponding components.

[0053] As in Fig. 7 and Fig. As shown in Figure 8, the calender 18 of the present embodiment differs significantly from that of the first embodiment in that the rolls 18a, 18b constituting the calender 18 are arranged in a substantially vertical plane, and in that the last roll 18a is pressed against the guide roll 11 with the belt 16 and the web 19 interposed therebetween. In addition, the number of rolls 18b constituting the calender 18 is two and is therefore smaller than that of the first embodiment.

[0054] As in Fig. As shown in Figure 8, in the calender 18 of the present embodiment, the last roll 18a is urged toward the guide roll 11 of the web winding device by the spring 20. The other rolls 18b are each urged by a spring 20 to press the roll 18a or 18b positioned below, with the web 19 interposed therebetween. Fig. 7 the springs 20 are omitted.

[0055] In the second embodiment, unlike the first embodiment, the last roll 18a of the calender 18 is designed to press against the guide roll 11 of the web winding device, with the belt 16 and the web 19 interposed therebetween. Thus, immediately after the web is released from the last roll 18a of the calender 18, the web 19 is pressed against the guide roll 11 by the roll 18a, with the belt 16 interposed therebetween, and is then wound onto the outer surface of the bobbin 17 or onto the portion of the web 19 that has been wound onto the bobbin 17.

[0056] Thus, the moving distance of the web 19 until the web 19 is wound onto the bobbin 17 after being compressed by the calender 18 is shortened compared to the first embodiment. Therefore, the second embodiment achieves the following advantage in addition to the advantages (1) to (4) of the first embodiment.

[0057] (5) In the web winding device, the rollers 18a, 18b constituting the calender 18 are arranged in a substantially vertical plane. The last roller 18a is urged toward the guide roller 11 by the spring 20 with the belt 16 and the web 19 interposed therebetween. Both rollers 18b are each urged by a spring 20 to press the roller 18a or 18b positioned below it, with the web 19 interposed therebetween. Thus, the distance the web 19 is moved until the web 19 is wound onto the bobbin 17 after being compressed by the calender 18 is shortened. Therefore, after the web is compressed by the calender 18, the web 19 is unlikely to absorb air until it is wound on the bobbin 17, so that the widening of the web 19 in the width direction is further effectively prevented.

[0058] The present invention is not limited to the embodiments described above, but may be modified, for example, as follows.

[0059] As in Fig. As shown in Fig. 9, the web winding device of the first embodiment may include a pressing device (pressing means) 40 at a position opposite to the guide roller 11. The pressing device presses the web 19, which is moved together with the belt 16 wound in a loop over the guide roller 11. The pressing device 40 includes a pressing roller (pressing roller) 41 extending parallel to the guide roller 11 and a pressing spring 43 that urges a rotating shaft 42 of the pressing roller 41 toward the center axis of the guide roller 11.

[0060] Thus, similar to the first embodiment, the distance by which the web 19 is moved over the guide roller 11 and the belt 16 until the web 19 is wound onto the bobbin 17 after the web is compressed by the calender 18 is long. However, the web 19 is pressed by the pressing roller 41 as it moves along the circumference of the guide roller 11 together with the belt 16 wound in a loop over the guide roller 11. Thus, even if the web 19 absorbs air until it is moved to the position corresponding to the pressing roller 41 after being compressed by the calender 18, the air is removed as the web 19 is moved while being pressed by the pressing roller 41. Immediately after the air is removed, the web 19 is wound onto the spool body 17 while being pressed against the spool body 17 by the belt 16.

[0061] Therefore, unlike the first embodiment, even if the web 19 absorbs air until it is moved to the position where the web 19 is wound on the guide roll 11 after being compressed by the calender 18 to remove air, the air is removed when the web passes through the position where the web 19 is pressed by the pressing roll 41. Since the web 19 is wound on the bobbin 17 immediately after the air is removed, the widthwise expansion of the web 19 is limited compared to the first embodiment.

[0062] The number of rolls forming the calender 18 is not limited to three or four, but can be five or more.

[0063] In the configuration in which the last roll 18a of the calender 18 is pressed against the guide roll 11 with the belt 16 interposed therebetween, as in the second embodiment, it is not necessary for the rotational axes of the rolls 18a and 18b constituting the calender 18 to be arranged in a vertical plane. For example, the rotational axes may be arranged in an inclined flat plane.

[0064] The direction of movement of the bobbin 17 between the winding start position and the full bobbin position is not limited to the vertical direction. For example, the direction of movement can be a horizontal direction or an oblique direction.

[0065] The limiting mechanism 27 can be modified as long as it is mounted on the spool support shaft 21 to cover the openings of the passage 32. For example, the limiting mechanism 27 may have annular grooves instead of the elastic members 31 corresponding to the openings. In this case, the annular grooves are arranged at positions corresponding to the openings of the passage 32 in the spool support shaft 21. An annular rubber ring is fitted into each of the annular grooves. When compressed air is not supplied to the passage 32, the rubber rings are held in positions retracted from the outer peripheral surface of the spool support shaft 21. When compressed air is supplied to the passage 32, a portion of the rubber rings protrudes from the annular grooves to support the spool 17.

[0066] The coil body support shaft 21 can be supported not only on one side but on both sides.

[0067] Therefore, it is to be understood that the present examples and embodiments are to be considered as illustrative and not restrictive and that the invention is not limited to the details described above, but that it may be modified within the scope of the invention as defined by the appended claims.

[0068] A web winding device includes a plurality of guide rollers, an endless belt wound in a loop over the guide rollers, a bobbin rotated by the belt, a calender, a bobbin support shaft, and a guide mechanism. The bobbin support shaft is rotatably supported by a bearing on at least one side. The bobbin is fixed to the bobbin support shaft in a state where movement of the bobbin in the axial direction is limited by a limiting mechanism. The guide mechanism is coupled to at least one side of the bobbin support shaft. The guide mechanism limits the movement of the bobbin support shaft in the axial direction and guides movement of the bobbin support shaft in a direction orthogonal to the axial direction.

Claims

[1] Web winding device comprising: a plurality of guide rollers (11-15); an endless belt (16) wound in a loop over the guide rollers (11-15); a spool body (17) rotated by the belt (16); and a calender (18), whereby the web winding device is designed to wind a web (19) which has been compressed by the calender (18) and further comprises: a spool support shaft (21) rotatably supported by a bearing (30) on at least one side, wherein the spool (17) is fixed to the spool support shaft (21) in a state in which a movement of the spool (17) in an axial direction is limited by a limiting mechanism (27); and a guide mechanism (26) coupled to at least one side of the spool support shaft (21), wherein the guide mechanism (26) limits movement of the spool support shaft (21) in an axial direction and guides movement of the spool support shaft (21) in a direction orthogonal to the axial direction. [2] A web winding device according to claim 1, wherein the bobbin support shaft (21) is coupled to the guide mechanism (26) only on one side. [3] Web winding device according to claim 1 or 2, wherein the guide mechanism (26) comprises: a plurality of guide shafts (28) extending in a direction orthogonal to the axial direction of the spool support shaft (21), and a slider (29) supported to be movable along the guide shafts (28), and the bearing (30) which rotatably supports the spool support shaft (21) is provided in the slider (29). [4] Web winding device according to one of claims 1 to 3, wherein the limiting mechanism (27) comprises: a plurality of elastic members (31) arranged on an outer peripheral surface of the coil body support shaft (21), and a passage (32) provided in the coil body support shaft (21) and capable of supplying compressed air to positions corresponding to the elastic members (31), and when the compressed air is supplied to the passage (32), the elastic members (31) are maintained in the state in which the elastic members (31) press on the spool (17) such that a movement of the spool (17) in the axial direction of the spool support shaft (21) is limited.

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