Winding-up device for sheet-like product on wound pipe

Abstract

To provide a winding-up device, which is configured to alternatively align in parallel a plurality of cylinder units rotating together with a winding shaft and chuck units holding a wound pipe rotatably mounted on the winding shaft at an outer peripheral side, facilitating adjustment operation of friction force between a plurality of air cylinder pistons of the cylinder unit and a friction ring of the chuck unit.SOLUTION: A winding-up device comprises: adjustment rings 18 mounted on a cylinder unit 16 slidably in a circumferential direction; engaging parts formed in a plurality of air cylinder pistons 30b; a plurality of locking parts 72a to 72f extending on the adjustment rings. The locking part of the adjustment ring is set to be engaged with or released from the engaging part of the piston by changing rotational angle positions of the adjustment rings relating to the cylinder unit several times. That allows adjustment of a contact area between a friction ring and a plurality of pistons by selectably suppressing motion of the pistons and changing the number of pistons brought into press-contact with the friction ring of the chuck unit.SELECTED DRAWING: Figure 12-1

Description

[Technical field]

[0001] The present invention relates to a sheet-like product winding device used in the operation of winding various sheet-like products (webs) such as long strip-shaped plastic films, paper, nonwoven fabrics, and metal foils around a winding tube (core). [Background technology]

[0002] The winding device for sheet products, which winds long strip-shaped plastic film, paper, nonwoven fabric, metal foil, etc., onto a winding tube, is provided with a rotatably driven hollow winding shaft, and a plurality of ring-shaped cylinder units fixed concentrically to the winding shaft and rotating integrally therewith, and a plurality of ring-shaped chuck units attached concentrically to the winding shaft and rotatable relative to the winding shaft are arranged in parallel in the axial direction of the winding shaft, and the chuck units are provided with a plurality of chuck members arranged around the circumference of their outer periphery so that the winding tube can be integrally held from its inner periphery side in a freely detachable manner by the plurality of chuck members, and the cylinder unit is provided with a plurality of cylinder holes arranged parallel to the axis of the winding shaft and opening on the annular side surface facing the chuck unit, and each cylinder hole is provided with a One known device has an air cylinder into which a piston is fitted, the tip of which moves forward and backward from an annular side opening by compressed air supplied to a cylinder hole through an air path formed in the hollow part of the reel, the tube wall of the reel, and the cylinder unit, and a friction ring is provided in the chuck unit against which the tip of the piston of the cylinder unit is pressed directly or indirectly, so as to rotate integrally with the chuck unit. The rotational power of the cylinder unit, which rotates integrally with the rotationally driven reel, is transmitted to the chuck unit by the friction force between the tip of the piston of the cylinder unit and the friction ring, and the reel held by the chuck unit via the chuck member is rotated to wind up the sheet-like product onto the reel.

[0003] When various sheet-like products are wound onto a winding tube using the device having the above-mentioned configuration, for example, when a long strip-shaped film cut into narrow widths by a slitter is wound onto a winding tube integrally held by a chuck unit, in order to wind the film with a uniform tension, it is necessary to prevent the torque generated in the chuck unit, which is generated by the rotational power of the cylinder unit rotating integrally with the rotatingly driven winding shaft, being transmitted to the chuck unit by the frictional force between the piston tip of the cylinder unit and the friction ring, from varying between the chuck units. In this case, if the friction coefficient between the piston tip of the cylinder unit and the friction ring ([frictional force acting on the contact surface between the piston tip and the friction ring] / [pressure acting perpendicular to the contact surface between the piston tip and the friction ring]) is the same for all the cylinder units, it is easy to make the torque generated by the chuck unit uniform. However, since the friction coefficient varies from one unit to another, in order to make the torque generated by the chuck unit uniform, it is necessary to adjust the contact area between the piston and the friction ring or adjust the pressure of the compressed air supplied to the air cylinder of the cylinder unit.

[0004] For example, a device has been proposed in which, in a winding device for sheet products having the above-mentioned configuration, a through hole is formed in the radial direction of the cylinder unit, penetrating from its outer peripheral surface to the cylinder hole of the air cylinder, a locking hole is formed in the outer peripheral surface of the piston of the air cylinder so as to correspond to the position of the through hole when the piston is retracted into the cylinder hole, an attraction member formed of a permanent magnet or a ferromagnetic material is fixed to the inner side of the locking hole, and a locking pin formed of a permanent magnet or a ferromagnetic material is inserted into the through hole, has its tip inserted into the locking hole, and is magnetically attracted to the attraction member.The device has been proposed in which a through hole is formed in the radial direction of the cylinder unit, penetrating from its outer peripheral surface to the cylinder hole of the air cylinder, With this configuration, the locking pin is inserted into the through hole and the locking hole, and the locking pin engages with the locking hole to stop the movement of the piston, while a jig made of a permanent magnet or a ferromagnetic material and having a shape whose tip can be inserted into the through hole is used, and the locking pin is magnetically joined to the tip of the jig and removed from the through hole and the locking hole, allowing the piston to advance from the cylinder hole. By selectively preventing the pistons from advancing from the cylinder holes for multiple air cylinders, the number of pistons whose tips are pressed against the friction ring can be changed, making it possible to adjust the contact area between the friction ring and multiple pistons (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6710841 (pages 7-8, Figures 6-7) Summary of the Invention [Problem to be solved by the invention]

[0006] According to the configuration disclosed in Patent Document 1, the rotational power transmitted from the cylinder unit to the chuck unit by the frictional force between the tip of the piston and the friction ring can be adjusted by a relatively simple operation of inserting and removing the locking pin into and from the through hole of the cylinder unit and the locking hole of the piston. However, in a device with such a configuration, it is necessary to prepare a dedicated jig for removing the locking pin from the through hole of the cylinder unit and the locking hole of the piston. In addition, the locking pin removed from the through hole and the locking hole requires time and effort to be stored so as not to lose it. Furthermore, since it is difficult to tell from the outside whether the locking pin is inserted into the through hole and the locking hole, there is a problem that it is time-consuming to adjust the contact area between the piston and the friction ring.

[0007] The present invention has been made in consideration of the above circumstances, and has an object to provide an apparatus for winding a sheet-like product having a configuration in which a plurality of cylinder units, which are fixed concentrically to a hollow reel that is driven to rotate and rotate integrally with the reel, and chuck units, which are attached concentrically to the reel, rotatable relative to the reel, and which hold the reel integrally with the reel by a chuck member, are arranged alternately in parallel in the axial direction of the reel, in which the apparatus can easily adjust the frictional force between the pistons of the plurality of air cylinders of the cylinder unit and the friction ring of the chuck unit to equalize the winding torque of the sheet-like product onto the reel in the plurality of chuck units, without the need to prepare special tools for this adjustment or the trouble of storing some parts. [Means for solving the problem]

[0008] In this invention, as a means for achieving the above object, an adjustment ring is attached to the cylinder unit, and by rotating the adjustment ring relative to the cylinder unit, it is possible to selectively prevent the pistons from advancing out of the cylinder holes of multiple air cylinders. That is, the invention according to claim 1 provides a method for manufacturing a winding tube having a winding tube, comprising: arranging a plurality of ring-shaped cylinder units that are fixed concentrically to a hollow winding shaft that is driven to rotate and rotate integrally with the winding shaft; and ring-shaped chuck units that are attached concentrically and rotatably to the winding shaft and that integrally hold a winding tube from its inner peripheral surface side by means of a plurality of chuck members arranged around the circumference of the outer periphery, the ring-shaped chuck units being arranged alternately in parallel along the axial direction of the winding shaft; and forming a plurality of cylinder holes in the cylinder units that are arranged parallel to the axis of the winding shaft and open to the annular side surface facing the chuck units, the cylinder holes being arranged around the circumference of the winding shaft and opening to the annular side surface facing the chuck units. a winding tube held by the chuck unit via the chuck member to rotate and wind the sheet-like product onto the winding tube, the winding tube being rotated and held by the chuck unit; an air cylinder having a piston inserted into each of the chuck holes, the piston having a tip end that advances and retreats from an annular side opening by compressed air supplied to a cylinder hole through an air path formed in the hollow part of the winding spindle, the tube wall of the winding spindle, and the cylinder unit; a friction ring against which the tip end of the piston of the cylinder unit is pressed directly or indirectly is provided in the chuck unit so as to rotate integrally with the chuck unit; the rotational power of the cylinder unit, which rotates integrally with the rotationally driven winding spindle, is transmitted to the chuck unit by frictional force between the tip end of the piston of the cylinder unit and the friction ring; and the winding tube held by the chuck unit via the chuck member is rotated to wind the sheet-like product onto the winding tube, the winding tube being rotated and wound by the sheet-like product onto the winding tube, the winding tube being rotated and held by the chuck unit via the chuck member. the cylinder unit is cut out on its outer side facing the outer circumferential surface to form an engagement portion, and the adjustment ring is provided with a plurality of locking portions corresponding to the pistons of the plurality of air cylinders, each of which is extended in a centripetal direction of the adjustment ring so as to protrude, and each locking portion of the adjustment ring has a different length dimension in the circumferential direction of the adjustment ring, and is set so that the locking portions of the adjustment ring are sequentially engaged with or disengaged from the engagement portions of the pistons of the plurality of air cylinders by changing the rotational angle position of the adjustment ring relative to the cylinder unit a plurality of times,The operation of the pistons is selectively inhibited, and the number of pistons whose tip portions are pressed against the friction ring is changed, making it possible to adjust the contact area between the friction ring and the plurality of pistons, and an index indicating a plurality of rotation angle positions of the adjustment ring relative to the cylinder unit is provided on the outer circumferential surface of the adjustment ring or the outer circumferential surface of the cylinder unit.

[0009] The invention of claim 2 is characterized in that, in the winding device described in claim 1, the cylinder unit has six or more air cylinders equally spaced in the circumferential direction, and the adjustment ring has the same number of locking portions as the air cylinders.

[0010] The invention of claim 3 is characterized in that, in the winding device described in claim 2, six air cylinders are provided in the cylinder unit and six locking portions are provided in the adjustment ring, and the six locking portions are formed so that the number of air cylinders whose piston operation is suppressed increases by one each time the adjustment ring is rotated 7.5° in one direction relative to the cylinder unit around its axial position as the center of rotation, and the number of air cylinders whose piston operation is suppressed decreases by one each time the adjustment ring is rotated 7.5° in the opposite direction relative to the cylinder unit around its axial position as the center of rotation.

[0011] The invention of claim 4 is characterized in that, in the winding device described in any one of claims 1 to 3, an annular plate is fixed to the cylinder unit so as not to hinder the rotational movement of the adjustment ring by interposing an adjustment ring therebetween and so as to allow slight movement of the adjustment ring in the axial direction, a guide convex portion and a sliding protrusion are formed on the annular side surface of the adjustment ring facing the annular plate, the annular plate is formed with a plurality of small holes arranged in an arc shape into which the guide convex portion fits sequentially in response to changes in the rotational angle position of the adjustment ring relative to the cylinder unit, and an arc-shaped elongated hole is formed into which the sliding protrusion fits and into which it slides as the guide convex portion fits into the plurality of small holes, and a spring is provided to urge the adjustment ring from the cylinder unit toward the annular plate. Effect of the Invention

[0012] In the winding device for sheet products according to the invention of claim 1, the adjustment ring is slid circumferentially relative to the cylinder unit, and the locking portion of the adjustment ring partially blocks or opens the cylinder hole opening of the air cylinder of the cylinder unit. For the air cylinders of the cylinder unit whose cylinder hole opening is partially blocked by the locking portion of the adjustment ring, even if compressed air is supplied to the cylinder hole through the hollow portion of the reel and the tube wall of the reel and the air path formed in the cylinder unit to operate the piston, the engagement portion formed on the piston engages with the locking portion of the adjustment ring to inhibit the operation of the piston, while for the air cylinders whose cylinder hole opening is open, compressed air is supplied to the cylinder hole to operate the piston without hindrance, and the tip of the piston is pressed against the friction ring provided in the chuck unit. In this case, the locking portions of the adjustment ring have different length dimensions in the circumferential direction of the adjustment ring, and are set so that the locking portions of the adjustment ring are sequentially engaged with or disengaged from the engagement portions of the pistons of the air cylinders by changing the rotational angle position of the adjustment ring relative to the cylinder unit multiple times, thereby selectively suppressing the operation of the pistons. Therefore, the number of pistons whose tips are pressed against the friction ring can be changed to adjust the contact area between the friction ring and the multiple pistons. Indices indicating multiple rotational angle positions of the adjustment ring relative to the cylinder unit are provided on the outer circumferential surface of the adjustment ring or the outer circumferential surface of the cylinder unit, so that the adjustment work of the contact area between the friction ring and the pistons can be easily performed while visually checking the indicators. Therefore, when the winding device of the present invention is used, the work of equalizing the winding torque of the sheet-like product onto the winding tube in multiple chuck units becomes easier, and there is no need to prepare special tools for the work, nor is there the trouble of storing some parts.

[0013] In the winding device of the invention according to claim 2, by activating and inhibiting the pistons of six or more air cylinders, it is possible to appropriately adjust the contact area between the friction ring and the piston, and it is possible to effectively equalize the winding torque of the sheet-like product onto the winding tube in multiple chuck units.

[0014] In the winding device of the invention according to claim 3, the number of air cylinders whose pistons are prevented from operating increases or decreases by one each time the adjustment ring is rotated by 7.5° in one direction or the opposite direction relative to the cylinder unit, thereby making it possible to adjust the contact area between the friction ring and the piston in seven stages.

[0015] In the winding device according to claim 4, when changing the rotation angle position of the adjustment ring relative to the cylinder unit, the adjustment ring is slightly moved against the elastic force of the spring, the adjustment ring is temporarily separated from the annular plate fixed to the cylinder unit, and the guide protrusion of the adjustment ring is removed from the small hole of the annular plate. In this state, the adjustment ring is slightly rotated relative to the cylinder unit while the sliding protrusion of the adjustment ring is in sliding contact with the elongated hole of the annular plate. Then, when the guide protrusion of the adjustment ring is positioned in the small hole adjacent to the small hole of the annular plate, the adjustment ring is pressed against the annular plate by the elastic force of the spring, and the guide protrusion of the adjustment ring is fitted into the small hole of the annular plate. By these operations, the rotation angle position of the adjustment ring can be easily changed by one step, and the adjustment work of the contact area between the friction ring and the piston becomes easier. [Brief description of the drawings]

[0016] [Figure 1] 1 is a partial external front view showing an example of the configuration of a device for winding a sheet product onto a winding tube according to the present invention. [Diagram 2] 2 is a partially enlarged front view, partly in vertical section, of a main portion of the winding device shown in FIG. 1, showing one example of an embodiment of the present invention. [Diagram 3]3 is a left side view of a cylinder block in which an adjustment ring and an annular plate are assembled to one cylinder unit, which is a component of the winding device shown in FIG. 2, as viewed from the annular plate side. FIG. [Figure 4] FIG. 4 is a front view of the cylinder block shown in FIG. [Diagram 5] 4 is a front view, partly in vertical section, showing the cylinder block shown in FIG. 3 separated into its constituent elements. FIG. [Figure 6] FIG. 4 is a left side view of a cylinder unit which is a component of the cylinder block shown in FIG. 3. [Figure 7] FIG. 7 is a perspective view showing a piston of an air cylinder which is a component of the cylinder unit shown in FIG. 6. [Figure 8] 4 is a left side view of an adjustment ring which is a component of the cylinder block shown in FIG. 3. [Figure 9] FIG. 4 is a left side view of an annular plate which is a component of the cylinder block shown in FIG. 3. [Figure 10] 9 is a partially enlarged front sectional view for explaining an engagement relationship between the piston shown in FIG. 7 and the adjustment ring shown in FIG. 8. [Figure 11] FIG. 5 is a front view of the cylinder block shown in FIG. 4 with the indicators displayed at different positions. [Figure 12-1] FIG. 4 is a left side view of the cylinder block shown in FIG. 3 with the annular plate removed, as viewed from the adjustment ring side, showing one mode in which the piston of the air cylinder of the cylinder unit engages with the locking portion of the adjustment ring. [Figure 12-2] FIG. 11 is a left side view showing another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. [Figure 12-3] FIG. 11 is a left side view showing still another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. [Figure 12-4] FIG. 11 is a left side view showing still another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. [Figure 12-5] FIG. 11 is a left side view showing still another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. [Figure 12-6] FIG. 11 is a left side view showing still another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. [Figure 12-7] FIG. 11 is a left side view showing still another manner in which the piston of the air cylinder of the cylinder unit and the locking portion of the adjustment ring engage with each other. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. The device for winding a sheet-like product onto a bobbin according to the present invention, as shown in FIG. 1, is equipped with a winding shaft section 10, which is provided with a winding shaft 12 that is supported in a horizontal position and driven to rotate by a support and drive mechanism (not shown). The winding shaft section 10 includes a cylinder block 14 consisting of a ring-shaped cylinder unit 16, an adjustment ring 18 and an annular plate 20, and a chuck unit 22 that is also ring-shaped and has the same diameter as the cylinder unit 16, etc., and is arranged alternately in parallel along the axial direction of the winding shaft 12.

[0018] The reel 12 is hollow, and the hollow portion forms an air passage 24 that is connected to a compressed air source (not shown). The cylinder unit 16 is fixed concentrically to the outer circumferential surface of the reel 12, the adjustment ring 18 is attached to the cylinder unit 16 concentrically and slidably in the circumferential direction relative to the cylinder unit 16, and the annular plate 20 is fixed to the cylinder unit 16 via the adjustment ring 18 and so as not to impede the rotation of the adjustment ring 18. The adjustment ring 18 is held by the cylinder unit 16 so as to be slightly movable in the axial direction, as will be described later. The cylinder block 14, which is composed of the cylinder unit 16, the adjustment ring 18, and the annular plate 20, rotates integrally with the reel 12. The chuck unit 22 is attached concentrically to the outer circumferential surface of the reel 12, and is rotatably held by the reel 12 via a bearing, as will be described later.

[0019] As shown in an enlarged view of a portion of the winding spindle 10 in Fig. 2, the ring-shaped cylinder unit 16 is provided with a plurality of air cylinders 26a, 26b, each of which has cylinder holes 28a, 28b opening on one annular side surface facing the chuck unit 22 and the other annular side surface, around the circumference. In Fig. 2, the winding spindle 12 is omitted, and the upper half of the winding spindle 10 is shown in a vertical cross section, while the lower half is shown in a partial vertical cross section. As shown in a left side view of the cylinder block 14 in Fig. 3, twelve air cylinders 26a, 26b (two x six) are provided on one annular side surface of the cylinder unit 16, and six are provided on the other annular side surface, with each air cylinder 26b being located at the middle position between adjacent pairs of air cylinders 26a, 26a. Pistons 30a, 30b are inserted into cylinder holes 28a, 28b of the air cylinders 26a, 26b, and the pistons 30a, 30b advance and retreat through the openings of the cylinder holes 28a, 28b. These air cylinders 26a, 26b are each disposed parallel to the axis of the winding spindle 12. For ease of explanation, different operating states of the cylinder unit 16 and the chuck unit 22 are shown together in one drawing in Figure 2.

[0020] Although not shown, an air passage communicating with the air passage 24 is drilled radially through the reel 12, and a long ventilation groove communicating with the air passage is formed on the outer periphery of the reel 12 so as to extend in the axial direction. Furthermore, annular ventilation grooves 32, 34 are formed in the inner periphery of the cylinder unit 16 in the circumferential direction, and vent holes 36, 38 communicating with the annular ventilation grooves 32, 34 are drilled for each of the air cylinders 26a, 26b. Compressed air is supplied from a compressed air source through the air passage 24, air passage, and long ventilation groove of the reel 12 and the annular ventilation grooves 32, 34 and vent holes 36, 38 of the cylinder unit 16 to the air cylinders 26a, 26b, thereby operating the air cylinders 26a, 26b and causing the pistons 30a, 30b to advance from the cylinder holes 28a, 28b toward the chuck units 22 on both the left and right sides.

[0021] The chuck unit 22 is rotatably held on the outer circumferential surface of the winding shaft 12 via a bearing 40. A friction ring 42 is disposed on the chuck unit 22 so as to face one annular side surface of the cylinder unit 16 on the side where the air cylinder 26a is provided. The friction ring 42 is held so as to be slidable in a direction parallel to the axial direction of the winding shaft 12. A coil spring 44 is disposed on the chuck unit 22, and the elastic force of the coil spring 44 urges the friction ring 42 toward the air cylinder 26a of the cylinder unit 16. Reference numeral 46 in the figure denotes a ring-shaped stopper for restricting the elastic force of the coil spring 44 from moving the friction ring 42 toward the air cylinder 26a by more than a predetermined distance. Another friction ring 48 is disposed on the chuck unit 22 so as to face the other annular side surface of the cylinder unit 16 on the side where the air cylinder 26b is provided.

[0022] A plurality of, for example, six, circular holes 50 are formed around the outer periphery of the chuck unit 22, and a chuck member 52 is inserted into each of the circular holes 50. The bottom surface of the chuck member 52 is tapered, and six accommodating holes 54 are formed around the outer periphery of the friction ring 42, the hole bottom surface of which is tapered to correspond to the tapered bottom surface of the chuck member 52. The chuck members 52 are accommodated in the respective accommodating holes 54 of the friction ring 42, and the chuck members 52 move in the radial direction with the sliding movement of the friction ring 42, and are configured to appear and disappear from the circular holes 50 on the outer periphery of the chuck unit 22. A narrow groove 56 is formed in the chuck member 52, and a circumferential groove 58 (see FIG. 1) is formed in the center of the outer periphery of the chuck unit 22 in a circumferential direction so as to be aligned with the narrow groove 56. A retaining ring 60 is fitted into the narrow groove 56 and the outer circumferential groove 58 to prevent the chuck member 52 from slipping out of the circular hole 50 due to centrifugal force generated when the chuck unit 22 rotates. A permanent magnet piece 62 is embedded in the tapered bottom surface of the accommodation hole 54 of the friction ring 42 to hold the chuck member 52 so that it can slide against the bottom surface.

[0023] The operation of attaching and detaching the winding tube to and from the outer periphery of the chuck unit 22 is carried out as follows. When high-pressure compressed air is supplied from a compressed air source to the air cylinder 26a through the air passage 24, the ventilation passage, and the long ventilation groove of the reel 12, as well as the annular ventilation groove 32 and the ventilation hole 36 of the cylinder unit 16, as shown in the left upper half of FIG. 2, the piston 30a of the air cylinder 26a advances toward the friction ring 42 and pushes the friction ring 42 to the back of the chuck unit 22 (the back right in the drawing) against the elastic force of the coil spring 44. With this sliding movement of the friction ring 42, the chuck member 52, while in sliding contact with the tapered bottom surface of the accommodation hole 54 of the friction ring 42, changes its holding position on the tapered bottom surface of the accommodation hole 54 from above to below and moves in the radial direction (centripetal direction). As a result, the chuck member 52 is retracted into the circular hole 50 on the outer periphery of the chuck unit 22. In this state, after inserting and arranging a winding tube (not shown) on the outer periphery of the chuck unit 22, the supply of compressed air to the air cylinder 26a is stopped, and the friction ring 42 moves toward the air cylinder 26a due to the elastic force (restoring force) of the coil spring 44, and the piston 30a retreats, as shown in the upper right half of Fig. 2. As the friction ring 42 moves toward the air cylinder 26a, the chuck members 52, while sliding against the tapered bottom surface of the accommodation hole 54 of the friction ring 42, change their holding positions on the tapered bottom surface of the accommodation hole 54 from lower to upper, and move in the radial direction (centrifugal direction). Due to this operation, the upper part (top) of the chuck members 52 protrudes from the inside of the circular hole 50 on the outer periphery of the chuck unit 22, and the upper part of the chuck members 52 is pressed against the inner periphery of the winding tube, and the winding tube is integrally held by the chuck unit 22 via the six chuck members 52. When the upper part of the chuck member 52 is pressed against the inner peripheral surface of the winding tube, the friction ring 42 stops moving toward the air cylinder 26a. When the winding tube is to be detached from the chuck unit 22 after the sheet product has been wound onto it, high-pressure compressed air is supplied from the compressed air source to the air cylinder 26a, and the chuck member 52 is pulled into the circular hole 50 on the outer periphery of the chuck unit 22 by the above-mentioned operation.

[0024] When the sheet product is wound onto the winding tube attached to the chuck unit 22, compressed air at relatively low pressure is supplied from the compressed air source to the air cylinders 26a, 26b through the air passage 24, air passage and long air groove of the reel 12, and the annular air grooves 32, 34 and air holes 36, 38 of the cylinder unit 16, so that the winding tube is held integrally to the chuck unit 22 by the chuck members 52 (the state shown in the upper right part of Figure 2).Then, the air cylinders 26a, 26b are operated to press the piston 30a against the friction ring 42 of the chuck unit 22, and press the piston 30b against the friction ring 48. In this state, the rotational power of the cylinder unit 16, which rotates integrally with the reel 12, is transmitted to the chuck units 22 on both the left and right sides by the frictional force between the tip of the piston 30a of the cylinder unit 16 and the friction ring 42 of the chuck unit 22 and the frictional force between the tip of the piston 30b and the friction ring 48, generating a winding torque on the tube held by the chuck unit 22.

[0025] Next, a configuration for adjusting the contact area between the pistons 30a, 30b of the air cylinders 26a, 26b and the friction rings 42, 48 in order to uniform the torque generated in the chuck unit 22 will be described. In this embodiment, no adjustment is performed on the 12 air cylinders 26a in which the tip of the piston 30a is pressed against the friction ring 42, but the contact area between the other six air cylinders 26b and the friction ring 48 is adjusted by preventing the piston 30b from advancing from the cylinder hole 28b. The configuration and operation will be described below with reference to Figs. 3 to 12-7.

[0026] As shown in Figures 3, 4 and 5, which show a left side view, a front view, and a front view in a separated state of the cylinder block 14, an adjustment ring 18 and an annular plate 20 are assembled to the cylinder unit 16, and as shown in Figure 7, the tip sides of the pistons 30b of the multiple air cylinders 26b provided in the cylinder unit 16 are machined to prevent the pistons 30b from advancing out of the cylinder holes 28b.

[0027] As shown in Figs. 5 and 6, the cylinder unit 16 has an outer periphery on the side where the cylinder holes 28b of the six air cylinders 26b are open, machined into a three-step surface. Six screw holes 64 are drilled in the side of the cylinder unit 16 at equal intervals in the circumferential direction. As shown in Fig. 7, the piston 30b of the air cylinder 26b is cut out from its tip surface along the axial direction toward the outer periphery of the cylinder unit 16 to form an engagement portion 66. The engagement portion 66 is formed so that a cutout surface 68 is substantially flush with the second-step outer periphery 16b of the cylinder unit 16. A cutout portion 70 is also formed on the inner side of the piston 30b facing the inner periphery of the cylinder unit 16, and the cutout portion 70 engages with the flange portion 71a (see Fig. 2) of the flanged collar 71 to prevent the piston 30b from rotating.

[0028] The adjustment ring 18 is formed with an inner diameter dimension such that the inner peripheral surface 18a thereof slidably fits on the outer peripheral surface 16a of the first stage of the cylinder unit 16. As shown in Fig. 8, the adjustment ring 18 has six arc-shaped locking portions 72a to 72f integrally extended from one side surface (the left side surface in Fig. 5) so as to protrude toward the center of the sphere. The six locking portions 72a to 72f are provided so that their respective arc-shaped tips are located on one circumference, and the arc-shaped tips are formed to correspond to the outer peripheral surface 16b of the second stage of the cylinder unit 16. The arc-shaped locking portions 72a to 72f are equally spaced in the circumferential direction of the adjustment ring 18, and are formed with different length dimensions in the circumferential direction, as described later. The adjustment ring 18 is rotatably attached to the cylinder unit 16 with the arc-shaped tip portions of the locking portions 72a to 72f in sliding contact with the second-stage outer peripheral surface 16b of the cylinder unit 16. Since the cutout surface 68 of the piston 30b of the air cylinder 26b is formed to be substantially flush with the second-stage outer peripheral surface 16b of the cylinder unit 16, the arc-shaped tip portions of the locking portions 72a to 72f do not come into contact with the cutout surface 68 of the piston 30b when the adjustment ring 18 rotates. A very small guide protrusion 74 is formed on the annular side surface of the adjustment ring 18, and a sliding protrusion 76 is formed at a position that forms an angle of 180° with the guide protrusion 74. In addition, a plurality of holding holes 78 into which coil springs 80 are inserted are formed on the side surface of the adjustment ring 18 facing the cylinder unit 16.

[0029] The inner peripheral portion 20a of the annular plate 20 is formed with an inner diameter dimension that fits the outer peripheral surface 16c of the third step of the cylinder unit 16. As shown in Fig. 9, the inner peripheral portion 20a of the annular plate 20 is cut in a semicircular shape at a portion corresponding to the cylinder hole 28b of the air cylinder 26b of the cylinder unit 16, and six bay-shaped portions 82 are formed so as not to hinder the advancement movement of the piston 30b of the air cylinder 26b, and six small through holes 84 are drilled at positions corresponding to the screw hole 64 of the cylinder unit 16 between the adjacent bay-shaped portions 82, 82. Furthermore, the annular plate 20 is formed with seven small holes 86 arranged in an arc shape, into which the guide protrusions 74 are sequentially fitted in response to the change in the rotation angle position of the adjustment ring 18 relative to the cylinder unit 16, and an arc-shaped elongated hole 88 into which the sliding contact protrusion 76 is fitted and slidably contacts is formed at a position that forms an angle of 180° with the seven small holes 86.

[0030] 5, when assembling the cylinder block 14, first, the annular plate 20 is fitted to the adjustment ring 18 by fitting the guide protrusion 74 of the adjustment ring 18 into one of the seven small holes 86 of the annular plate 20 and fitting the sliding protrusion 76 into the elongated hole 88 to press the annular plate 20 against the adjustment ring 18, and the coil spring 80 is fitted into the retaining hole 78 of the adjustment ring 18. Next, the adjustment ring 18 to which the annular plate 20 is joined is assembled to the cylinder unit 16 by aligning the six bay-shaped portions 82 of the annular plate 20 with the cylinder holes 28b of the six air cylinders 26b of the cylinder unit 16, and the six small through holes 84 of the annular plate 20 with the six screw holes 64 of the cylinder unit 16, respectively, and then the screws 90 are inserted through the small through holes 84 of the annular plate 20 and screwed into the screw holes 64 of the cylinder unit 16, thereby integrating the adjustment ring 18, the annular plate 20 and the cylinder unit 16.

[0031] In the cylinder block 14 thus configured, the adjustment ring 18 is biased from the cylinder unit 16 toward the annular plate 20 by the elastic force of the coil spring 80, and in this state, a gap 92 is formed between the opposing side surfaces of the cylinder unit 16 and the adjustment ring 18, as shown in Fig. 4. The size of the gap 92 is larger than the height dimension of the guide protrusion 74 of the adjustment ring 18 and smaller than the height dimension of the sliding contact protrusion 76. Therefore, by slightly moving the adjustment ring 18 in a direction that eliminates the gap 92 against the elastic force of the coil spring 80, the adjustment ring 18 can be separated from the annular plate 20, the guide protrusion 74 can be temporarily removed from the small hole 86, and the adjustment ring 18 can be rotated relative to the cylinder unit 16 and the annular plate 20 while the sliding contact protrusion 76 is in sliding contact with the elongated hole 88. Then, when the guide protrusion 74 of the adjustment ring 18 is positioned in another small hole 86 of the annular plate 20, the force applied to the adjustment ring 18 is released, and the adjustment ring 18 is pressed against the annular plate 20 by the elastic force of the coil spring 80, and the guide protrusion 74 of the adjustment ring 18 fits into the other small hole 86 of the annular plate 20. By this series of operations, it is possible to change the rotational angle position of the adjustment ring 18 relative to the cylinder unit 16 and the annular plate 20. When rotating the adjustment ring 18, the piston 30b of the air cylinder 26b is moved back into the cylinder hole 28b, and in this state, an operation is performed to change the rotational angle position of the adjustment ring 18 relative to the cylinder unit 16.

[0032] The above-mentioned operation allows the rotation angle position of the adjustment ring 18 relative to the cylinder unit 16 and the annular plate 20 to be changed, but as shown in Fig. 8, the six locking portions 72a to 72f of the adjustment ring 18 are formed with different length dimensions in the circumferential direction. Therefore, by changing the rotation angle position of the adjustment ring 18 relative to the cylinder unit 16, the locking portions 64 of the adjustment ring 18 can be engaged with the engagement portions 66 of the pistons 30b as shown in Fig. 10(a) or disengaged from the locking portions 66 of the pistons 30b as shown in Fig. 10(b), thereby selectively suppressing or allowing the operation of the pistons 30b for the six air cylinders 26b of the cylinder unit 16. When relatively low-pressure compressed air is supplied to the six air cylinders 26b, operation of the six pistons 30b is selectively inhibited or permitted, thereby changing the number of pistons 30b whose tips are pressed against the friction ring 48 of the chuck unit 22. This makes it possible to adjust the contact area between the friction ring 48 and the tips of the multiple pistons 30b, and the frictional force between them adjusts the rotational power transmitted from the cylinder unit 16 to the chuck unit 22, thereby adjusting the winding torque of the sheet product onto the winding tube for each chuck unit 22, and making it possible to equalize the winding torque in the multiple chuck units 22 arranged side by side on the reel 12.

[0033] In this embodiment, the number of actuated pistons 30b can be changed from 6 to 0, and as shown in FIG. 4, an index 94 indicating a plurality of rotation angle positions of the adjustment ring 18 relative to the cylinder unit 16 is provided on the outer peripheral surface of the adjustment ring 18, and a mark 96 is engraved on the outer peripheral surface of the annular plate 20. In the index 96, a scale mark of "0" indicates a case where the number of actuated pistons 30b is 3 and the number of pistons 30b inhibited from actuating is 3, "+1", "+2", and "+3" indicate a case where the number of actuated pistons 30b is 4, 5, and 6, respectively, and "-1", "-2", and "-3" indicate a case where the number of actuated pistons 30b is 2, 1, and 0, respectively. The angular intervals of the scale marks on the index 94 correspond to the angular intervals of the seven small holes 86 of the annular plate 20. As shown in FIG. 11 , indicators 98 indicating seven rotational angle positions of the adjustment ring 18 relative to the cylinder unit 16 may be provided on the outer circumferential surface of the cylinder unit 16, and benchmark lines 100 may be engraved on the outer circumferential surface of the adjustment ring 18.

[0034] The difference in the length dimension in the circumferential direction of the locking portions 72a-72f of the adjustment ring 18 and the angular interval of the small holes 86 in the annular plate 20 (the angular interval of the scale on the index 94) will be described with specific numerical examples in Fig. 8 and Fig. 9. In this case, if the radius of the imaginary circle formed by the arc-shaped tips of the locking portions 72a-72f of the adjustment ring 18 is r, and the angle of the arc of the locking portions 72a-72f with the center (center of rotation) of the adjustment ring 18 is θ°, then the arc length of the locking portions 72a-72f = r × (πθ / 180). The length dimension in the circumferential direction of the locking portions 72a-72f varies depending on the radius r of the imaginary circle, and therefore the size of the adjustment ring 18. Therefore, if the difference in the length dimension of the locking portions 72a-72f is replaced with the difference in the angle θ of the arc with respect to the center of the adjustment ring 18, the angles of the arc of the locking portions 72a-72f are set to a=5°, b=7.5°, c=15°, d=22.5°, e=30°, and f=37.5°. The angles of the arc between the adjacent locking portions 72a-72f are set to A=60°, B=52.5°, C=40°, D=37.5°, E=30°, and F=22.5°. The angular interval of the small holes 86 in the annular plate 20 is set to p=7.5°, and the number of operating pistons 30b can be changed by one by rotating the adjustment ring 18 by 7.5°. The angles of the arcs of the engagement portions 72a to 72f in the adjustment ring 18 and the angular spacing of the small holes 86 in the annular plate 20 were determined by trial and error, and if the number of air cylinders 26b in the cylinder unit 16 is changed, it will be necessary to find appropriate values ​​through trial and error again.

[0035] 12-1 to 12-7 show various modes of engagement between the piston 30b of the air cylinder 26b of the cylinder unit 16 and the locking portions 72a to 72f of the adjustment ring 18. These figures show the state seen from the adjustment ring 18 side with the annular plate 20 removed from the cylinder block 14, and for reference, the seven small holes 86 and the elongated holes 88 of the annular plate 20 are shown by imaginary lines (two-dot chain lines).

[0036] FIG. 12-1 shows a state in which the engagement portions 66 of the three pistons 30b are engaged with the locking portions 72b, 72d, and 72e of the adjustment ring 18, the three pistons 30b are actuated, and the three pistons 30b are inhibited from actuating. At this time, the scale of the index 96 indicates "0". When the adjustment ring 18 is rotated counterclockwise by 7.5° relative to the cylinder unit 16 from the state shown in FIG. 12-1, as shown in FIG. 12-2, the engagement portions 66 of the two pistons 30b are engaged with the locking portions 72e and 72f of the adjustment ring 18, the four pistons 30b are actuated, and the two pistons 30b are inhibited from actuating. At this time, the scale of the index 96 indicates "+1". When the adjustment ring 18 is rotated counterclockwise by 7.5° from the state shown in FIG. 12-2, the engagement portion 66 of one piston 30b engages with the locking portion 72f of the adjustment ring 18, as shown in FIG. 12-3, and five pistons 30b are operated and one piston 30b is inhibited from operating. At this time, the scale of the index 96 indicates "+2". Furthermore, when the adjustment ring 18 is rotated counterclockwise by 7.5° from the state shown in FIG. 12-3, as shown in FIG. 12-4, there is no piston 30b whose engagement portion 66 engages with the locking portions 72a to 72f of the adjustment ring 18, and all six pistons 30b are operated. At this time, the scale of the index 96 indicates "+3". Also, when the adjustment ring 18 is rotated clockwise by 7.5° with respect to the cylinder unit 16 from the state shown in FIG. 12-1, the engagement parts 66 of the four pistons 30b are engaged with the locking parts 72c, 72d, 72e, and 72f of the adjustment ring 18, as shown in FIG. 12-5, two pistons 30b are actuated, and four pistons 30b are inhibited from actuating. At this time, the scale of the index 96 indicates "-1". When the adjustment ring 18 is rotated clockwise by 7.5° from the state shown in FIG. 12-5, the engagement parts 66 of the five pistons 30b are engaged with the locking parts 72b, 72c, 72d, 72e, and 72f of the adjustment ring 18, as shown in FIG. 12-6, one piston 30b is actuated, and five pistons 30b are inhibited from actuating. At this time, the scale of the index 96 indicates "-2".Furthermore, when the adjustment ring 18 is rotated clockwise by 7.5° from the state shown in Fig. 12-6, the engagement portions 66 of the six pistons 30b engage with the locking portions 72a, 72b, 72c, 72d, 72e, and 72f of the adjustment ring 18, and not a single piston 30b moves, and all six pistons 30b are inhibited from moving, as shown in Fig. 12-7. At this time, the scale of the index 96 indicates "-3".

[0037] In the above embodiment, the configuration is such that the operation of the pistons 30b of all six air cylinders 26b is inhibited or permitted, but the configuration may be such that the operation of the pistons 30b of only some of the six air cylinders 26b is inhibited. Also, in the above embodiment, the air cylinders 26b in which the cylinder holes 28b open on one annular side surface of the cylinder unit 16 have been described, but the same configuration may be applied to all or some of the air cylinders 26a in which the cylinder holes 28a open on the other annular side surface of the cylinder unit 16. [Industrial Applicability]

[0038] The device for winding a sheet-like product onto a winding tube according to the present invention is used in conjunction with a slitter that cuts sheet-like products such as long, strip-like film into narrow widths, and is utilized in many businesses that handle various types of sheet-like products, such as films such as packaging film, wrap film, and release film, tapes such as adhesive tape, and papers such as wrapping paper. [Explanation of symbols]

[0039] 10 Winding shaft 12 reel shaft 14 Cylinder block 16 Cylinder unit 18 Adjustment Ring 20 Annular Plate 22 Chuck unit 24 Hollow part of the reel 26a, 26b Air cylinder 28a, 28b Cylinder bore of air cylinder 30a, 30b Piston of air cylinder 32, 34 Ventilation annular groove of cylinder unit 36, 38 Cylinder unit vent 40 Bearings 42, 48 Friction ring 44 Coil spring 52 Chuck member 64 screw holes 66 Piston engagement part 72a~72f Locking portion of adjustment ring 74 Adjustment ring guide protrusion 76 Sliding protrusion of adjustment ring 80 Coil spring 82 Bay-shaped part of annular plate 86 Hole in annular plate 88 Annular plate slot 92 Gap between cylinder unit and adjustment ring 94, 98 indicators 96, 100 gauge line

Claims

1. a ring-shaped cylinder unit which is fixed concentrically to a hollow reel which is driven to rotate and rotates integrally with the reel; and a ring-shaped chuck unit which is attached concentrically and rotatably to the reel and integrally holds the winding tube from its inner peripheral surface side by a plurality of chuck members arranged around the circumference of the outer peripheral portion, the ring-shaped cylinder unit being alternately arranged in parallel along the axial direction of the reel, a plurality of cylinder holes are formed around the circumference of the cylinder unit, the cylinder holes being arranged parallel to the axis of the winding spindle and opening on an annular side surface facing the chuck unit, and an air cylinder is provided in each of the cylinder holes, the piston having a tip portion moved forward and backward from the annular side surface opening by compressed air supplied to the cylinder hole through an air path formed in the hollow portion of the winding spindle, the tube wall of the winding spindle, and the cylinder unit; and a friction ring against which a tip portion of the piston of the cylinder unit directly or indirectly presses is provided on the chuck unit so as to rotate integrally with the chuck unit, a rotational force of the cylinder unit, which rotates integrally with the rotationally driven reel, is transmitted to the chuck unit by a frictional force between a tip end of the piston of the cylinder unit and the friction ring, and the reel held by the chuck unit via the chuck member is rotated to wind the sheet-like product onto the reel, an adjustment ring having an inner diameter dimension that does not impede the movement of the pistons of the plurality of air cylinders is attached to the annular side surface of the cylinder unit concentrically with the cylinder unit and slidably in a circumferential direction relative to the cylinder unit; Each piston of the plurality of air cylinders is provided with an engagement portion by cutting out an outer side facing an outer circumferential surface of the cylinder unit from a tip surface of the piston along an axial direction of the piston, and a plurality of locking portions corresponding to each piston of the plurality of air cylinders are provided on the adjustment ring so as to extend in a centripetal direction of the adjustment ring, the locking portions of the adjustment ring are set to have different length dimensions in the circumferential direction of the adjustment ring, and the rotational angle position of the adjustment ring relative to the cylinder unit is changed multiple times to sequentially engage or disengage the locking portions of the adjustment ring with the engagement portions of the pistons of the air cylinders, thereby selectively inhibiting the operation of the pistons, and changing the number of pistons whose tip portions are pressed against the friction ring, thereby making it possible to adjust the contact area between the friction ring and the multiple pistons; A device for winding a sheet-like product onto a winding tube, characterized in that an index indicating a plurality of rotational angle positions of the adjustment ring relative to the cylinder unit is provided on the outer peripheral surface of the adjustment ring or the outer peripheral surface of the cylinder unit.

2. 2. The winding device for a sheet-like product onto a winding tube according to claim 1, wherein the cylinder unit is provided with six or more air cylinders equally spaced in the circumferential direction, and the adjustment ring is provided with the same number of locking portions as the air cylinders.

3. 3. The winding device for a sheet-like product onto a winding tube according to claim 2, wherein the cylinder unit is provided with six air cylinders, the adjustment ring is provided with six locking portions, and the six locking portions are formed so that the number of air cylinders whose pistons are inhibited increases by one each time the adjustment ring is rotated in one direction relative to the cylinder unit about its axial position as a rotation center by 7.5°, and the number of air cylinders whose pistons are inhibited decreases by one each time the adjustment ring is rotated in the opposite direction relative to the cylinder unit about its axial position as a rotation center by 7.5°.

4. 4. The winding device for a sheet-like product onto a winding tube according to claim 1, wherein an annular plate is fixed to the cylinder unit so as not to hinder the rotational movement of the adjustment ring through the adjustment ring and to allow slight movement of the adjustment ring in the axial direction, a guide protrusion and a sliding protrusion are formed on an annular side surface of the adjustment ring facing the annular plate, the annular plate is formed with a plurality of small holes arranged in an arc shape, into which the guide protrusions are sequentially fitted in response to changes in the rotational angle position of the adjustment ring relative to the cylinder unit, and an arc-shaped elongated hole is formed into which the sliding protrusions fit and into which the sliding protrusions slide in accordance with the fitting movement of the guide protrusions into the plurality of small holes, and a spring is provided for urging the adjustment ring from the cylinder unit toward the annular plate.

Images