JP2014118254A - Friction winding shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction winding shaft in which a plurality of winding cores can be accurately and reliably held at predetermined mutual intervals so as not to cause centrifugal whirling even when each winding core is the one having relatively low mechanical strength and a narrow width such as a paper tube and a synthetic resin tube and attaching/detaching operation of the winding core can be performed relatively easily and in a short time.SOLUTION: A plurality of winding cores C are mounted on an outer periphery of a center drive shaft 2 via a winding core adapter 3 for each winding core. The winding core adapter 3, an annular body 6 externally fitted with a center drive shaft 2, a collar 7 provided at one end part of the annular body 6, winding core fixing means 8 for fixing the winding core C externally fitted with the annular body 6 on the annular body 6, an annular groove 9 concentrically formed with the annular body 6 on one edge surface of the annular body 6, and a plurality of balls 10 accommodated in the annular groove 9 are provided. The annular bodies 6 of the winding adapters 3 whose winding adapter groups 4 are adjacent to each other are in contact with each other sandwiching the respective balls 10.

Description

  In the present invention, a plurality of cylindrical cores such as paper tubes and plastic tubes are held at predetermined intervals, and belt-like sheets such as a metal foil and a thin metal plate are simultaneously wound around the cores. It relates to a friction winding shaft to be wound around.

  In a conventional friction winding shaft, for example, as disclosed in FIG. 3 of Japanese Patent Laid-Open No. 04-237515, a plurality of winding cores and the interval between the winding cores are kept constant on the outer periphery of the central drive shaft. The spacer and the shaft end ring are fitted, the shaft end ring is fixed to the center drive shaft, the core and the spacer are restrained at a predetermined position in the longitudinal direction of the center drive shaft, and the belt-like sheet is locked to each core. After that, the central drive shaft is rotationally driven, and the required rotational force is transmitted to each core through a plurality of friction pieces held on the central drive shaft, so that the core is rotationally driven, and the belt is wound around each core. There is a sheet that can be wound all at once.

  However, in this friction winding shaft, the core is only required to have a high mechanical strength such as a steel pipe, but if the mechanical strength is low such as a paper pipe or a synthetic resin pipe, If the inner peripheral surface is rubbed with a friction member, the core cannot be used because it is scraped by the friction member.

  Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 62-180884, a conventional friction winding shaft includes a large number of annular winding collars each having a gripping mechanism for gripping the inner peripheral surface of the winding core. A winding collar group consisting of a number of winding collars that are adjacent to the outer periphery is sandwiched between a fixed collar fixed to the center drive shaft and a movable collar movable along the center drive shaft, and the movable collar is fixed. The center drive shaft rotation can be transmitted to each take-up collar by the frictional force generated between the take-up collars of the take-up collar group by pressing with a pressure device toward the is there. In this friction winding shaft, the winding core can be fixed on the winding collar by a gripping mechanism, and the inner peripheral surface and end surface of the winding core are not rubbed during winding. A resin tube or the like can be used.

  However, in this friction winding shaft, if there is a difference in the winding diameter between the winding rolls on the winding core due to uneven thickness of the belt-like sheet during winding, each winding roll has a different winding diameter. Since they rotate individually at an inversely proportional number of rotations, the end surfaces of the adjacent winding collars rotate while sliding to cause friction loss. Further, during the winding, the winding collar also rotates with respect to the central drive shaft, so that friction loss occurs between the winding collar and the central drive shaft. Since the rotation of the central drive shaft is transmitted from both ends of the winding collar group to the central portion, when friction loss occurs, the rotational force transmitted to the winding collar group goes from both ends of the winding collar group to the central portion. It reduces so much. Therefore, it is not possible to accurately transmit the required rotational force to each winding core, the variation in winding tension of the belt-like sheet wound around each winding core is increased, and even a winding roll formed at the same time, The winding quality tends to be nonuniform between the winding rolls. Further, recently, it is often required to wind a narrow belt-like sheet on the core by the friction winding shaft, but when the width of the core is as narrow as the width of the winding collar, for example, Holding of the inner peripheral surface of the core by the gripping mechanism becomes unstable, and the core is easy to be held in a state tilted with respect to the winding collar. The end face of the roll may be uneven, or the roll may collapse during winding, making it impossible to wind.

Japanese Patent Laid-Open No. 04-237515 Japanese Patent Laid-Open No. 62-180884

  In view of the above-described problems, the present invention provides a plurality of cores, even if the core has a relatively small mechanical strength and a narrow width such as a paper tube or a synthetic resin tube. To provide a friction winding shaft that can accurately hold a predetermined mutual distance so that it can be securely held so that no swinging occurs, and that the core can be attached and detached relatively easily. It is an issue.

    Therefore, the friction winding shaft of the present invention is a friction winding shaft that penetrates and holds a plurality of winding cores at predetermined intervals and winds a belt-like sheet all around the winding core. A drive shaft, an annular core adapter for each core for mounting the core on the outer periphery of the center drive shaft, and the rotational force of the center drive shaft on each core adapter; A core adapter group consisting of a rotational force transmitting means that individually transmits to the center drive shaft so as to be capable of slip rotation and a core adapter group for each core through which the center drive shaft passes, Core adapter group positioning means for restraining at a predetermined position in the longitudinal direction of the core adapter, the core adapter is an annular body to be extrapolated to the central drive shaft, and a collar provided at one end of the annular body, On the annular body A core fixing means for fixing the inserted core on the annular body, an annular groove formed concentrically with the annular body on one end surface of the annular body, and a plurality of spheres accommodated in the annular groove. In the core adapter group, the annular main bodies of the core adapters adjacent to each other are in contact with each other with the sphere interposed therebetween.

  According to the present invention, even if the core has a relatively small mechanical strength, such as a paper tube or a synthetic resin tube, and its width is narrow, a plurality of the cores can be accurately aligned with each other. It is possible to hold the space securely and to prevent the occurrence of swinging. Moreover, since the friction loss between the core adapters is small, the required rotational force can be applied to the core relatively accurately. Therefore, a narrow belt-like sheet can be simultaneously wound around each winding core with good quality. In addition, it is not necessary to adjust the tightening force of the core group when attaching the core core to the core adapter or to install spacers between the cores, even when wearing the core adapter device on the winding collar group. Since there is no need to install spacers between the core adapters, the core adapter can be attached to the core adapter or the core adapter can be attached to the winding collar group in a relatively short time. The winding stop time can be shortened.

FIG. 1 is a schematic front view of a friction winding shaft according to an embodiment of the present invention. FIG. 2 is a right side view of the core adapter. FIG. 3 is a cross-sectional view of the core adapter in FIG. 4 is a cross-sectional view of the core adapter in FIG. FIG. 5 is a cross-sectional view for explaining another embodiment of the core adapter.

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, a friction winding shaft 1 winds a belt-like sheet S around a plurality of tubular cores C held at predetermined intervals, thereby winding each of the winding rolls on each core C. R is formed. In this embodiment, it is one of the two friction winding shafts provided in the sheet split winding device for winding a wide strip sheet into a plurality of strips, and each strip sheet S shown in FIG. A wide belt-like sheet is divided into a plurality of strips by a slitter device (not shown) to form a narrow belt-like sheet group arranged in a row in the width direction, and each narrow belt-like sheet of the belt-like sheet group is converted into the illustrated friction winding shaft. 1 and other friction winding shafts (not shown) are sequentially and alternately distributed to form a distribution belt-like sheet group to each friction winding shaft, and form a distribution belt-like sheet group to the friction winding shaft 1 shown.

  The illustrated friction winding shaft 1 includes a center drive shaft 2, an annular core adapter 3 for each core C for mounting the core C on the outer periphery of the center drive shaft 2, and the rotational force of the center drive shaft 2. To each core adapter 3, a rotational force transmitting means for transmitting the core adapter 3 to the center drive shaft 2 so as to be capable of slip rotation, and a core adapter 3 for each core C through which the center drive shaft 2 passes. The core adapter group 4 is composed of a core adapter group positioning means 5 that restrains the core adapter group 4 at a predetermined position in the longitudinal direction of the center drive shaft 2.

  The core adapter 3 includes an annular body 6 that is externally attached to the center drive shaft 2, a flange 7 that is provided at one end of the annular body 6, and a core C that is externally attached to the annular body 6. A winding core fixing means 8, a circular groove 9 formed concentrically with the circular main body 6 on one end surface of the circular main body 6, and a plurality of spheres 10 accommodated in the circular groove 9; The annular main bodies 6 of the core adapters 3 adjacent to each other in the group 4 are in contact with each other with the sphere 10 interposed therebetween.

  The core fixing means 8 is provided at at least three locations on the outer peripheral surface of the annular main body 6 in the circumferential direction, and gradually decreases in the rotational direction of the central drive shaft 2. A plurality of rollers 12 arranged on the outer periphery, an annular retainer 13 rotatably fitted on the outer periphery of the annular main body 6 that keeps the interval between the plurality of rollers 12, and a plurality of rollers 12 that can be expanded and contracted. The retainer so as to return to the standby position in which the diameter of the circle circumscribing the outer periphery of the annular engagement body 14 is larger than the inner diameter of the winding core C when the winding core is not extrapolated to the outer periphery of the annular engagement body 14 and the annular main body 6. An elastic member 15 is provided between the retainer 13 and the annular main body 6 for elastically expanding and contracting.

  As shown in FIG. 3, the annular main body 6 is a sphere for fixing the width of the opening of the annular groove 9 to be slightly narrower than the diameter of the sphere 10, which is fixed to one end face of the main body member 6 a with a bolt 16. A drop-off prevention member 6b and a contact member 6c having a cylindrical end 18 that can enter the annular groove 9 fixed to the other end surface of the main body member 6a with a bolt 17 are provided. This end 18 is the end of the annular body 6 that contacts the sphere 10. Therefore, even if the end 18 of the adjacent annular body 6 is not in contact with the sphere 10, it is possible to prevent the sphere 10 from dropping from the annular groove 9. A plurality of contact members 6c having different lengths from the other end surface of the main body member 6a to the end surface of the cylindrical end portion 18 are prepared, and the contact member 6c is appropriately replaced, whereby the annular main body 6 The mounting interval to the central drive shaft 2 can be changed according to the width of the belt-like sheet to be wound.

  The annular engagement body 6 is formed by cutting one portion of a steel annular body with a narrow width disposed along both edges with inward flanges that can be engaged with both end faces of the roller 12. Accordingly, a plurality of arc-shaped members may be connected by an elastic member so that expansion and contraction are possible.

  In this embodiment, the elastic member 15 is a tension coil spring, one end of which is attached to the pin 19 attached to the retainer 13 as shown in FIG. 3, and the other end is attached to the annular body 6 as shown in FIG. It is engaged with the pin 20 and accommodated in a groove 21 formed in the annular body 6. The pin 19 is formed so as to communicate with the groove 21 from the left end face of the annular body 6 and is inserted into a groove 6 d extending in the radial direction of the annular body 6.

  As shown in FIG. 1, the rotational force transmitting means for transmitting the rotational force of the center drive shaft 2 to each core adapter 3 is operated by the pressure fluid of the required pressure introduced into the sealed hollow portion of the center drive shaft 2. The friction member 23 inserted into the radial hole provided in the center drive shaft 2 can be pressed against the inner peripheral surface of the annular body 6 of the core adapter 3 by the piston 22 that performs the above operation. The central drive shaft 2 is cantilevered at its left end by a bearing device (not shown), and power is transmitted from a motor (not shown).

  The core adapter group positioning means 5 includes a positioning ring 24 and a positioning ring 25 that are arranged on both sides of the core adapter group 4 on the center drive shaft 2 and are detachable from the center drive shaft 2. The end of the right positioning ring 24 is in contact with the shoulder of a large diameter portion formed on the central drive shaft, and the left positioning ring 25 has a known inner surface (not shown) provided on the central drive shaft 2. It can be fixed on the central drive shaft 2 by being gripped by gripping means (for example, disclosed in JP-A-62-51537). Further, the left positioning ring 24 accommodates a sphere 26 in an annular groove similar to the core adapter 3, and the end 17 of the left end core adapter 3 can contact the sphere 26. The right positioning ring 24 may not be necessary.

  The winding core adapter 3 shown in FIG. 2 shows a state in which the winding core C is not extrapolated, the tension coil spring 15 is contracted, and the roller 12 has moved to the standby position in the bottom inclined groove 11. And the annular engagement body 14 has returned to the standby position where the diameter of the outer peripheral surface is larger than the inner diameter of the core C to be extrapolated.

  In order to attach the core C to the core adapter 3, the retainer 13 is removed by manually applying a rotational force against the contraction force of the coil spring 15 to the annular engagement body 14 while being pulled out from the central drive shaft 2. 2, the roller 12 is moved to a deep portion of the bottom inclined groove 11, and then the winding core C is inserted into the outer periphery of the annular body 6. At this time, the core C is inserted until it comes into contact with the flange 7 for facilitating the positioning operation of the core C. Thereafter, when the rotational force is not applied to the retainer 13 from the outside, the retainer 13 rotates with respect to the annular body 6 by receiving the repulsive force of the tension coil spring 15 in the extended state. As a result, each roller 12 moves simultaneously in the bottom inclined groove 11 to the shallower side by an equal distance, and is pushed up by the same amount by the bottom surface of the bottom inclined groove 11 to press the inner peripheral surface of the core C. When the roller 12 presses the inner peripheral surface of the core C, the rotational resistance of the retainer 13 with respect to the annular main body 6 increases and the rotation of the retainer 13 stops. However, since the retainer 13 is also given a rotational force from the tension coil spring 15 thereafter, the pressing state of the inner peripheral surface of the core C by each roller 12 continues. At this time, each roller 12 is pushed up by an equal amount, and the engagement surface 14a of the annular engagement body 14 extends parallel to the central axis of the annular body 6, so that the core adapter 3 is The core C can be concentrically held so that the center axis of the core C is not inclined with respect to the center axis of the annular body 6 regardless of whether the cut end surface of the core C is vertical or not. Further, since the outer diameter of the annular engagement body when the core is not attached can be changed by changing the urging force of the retainer 13 by the expansion and contraction member 15, even when the inner diameter of the core C is large, the core Can be securely fixed on the annular body 6.

  In order to remove the core C from the core adapter 3, a rotational force against the repulsive force of the coil spring 15 is applied to the retainer 13 by hand, and the retainer 13 is made deeper with respect to the annular body 6 and the bottom inclined groove 11 becomes deeper. 5, the roller 12 is moved to a deep portion of the bottom inclined groove 11 as shown in FIG. 5, and then the core C is extracted from the outer periphery of the annular body 6.

  In order to take out the winding roll R from the friction winding shaft 1 shown in FIG. 1, the lifting of the friction member 23 by the piston 22 is stopped, and after the restriction on the center drive shaft 2 of the left positioning ring 24 is released, From the left end of the center drive shaft 2 in the cantilever support state, the left positioning ring 24 and the winding roll R are extracted together with the core adapter 3.

  In order to wind the belt-like sheet S, the core C of each belt-like sheet S is previously attached to the core adapter 3, and the core adapter 3 to which the core C is attached is respectively connected to the central drive shaft 2. Is inserted from the left end to the required position on the outer periphery of the center drive shaft 2, and the left positioning ring 24 is further inserted. Thereafter, a pressing force is applied to the left positioning ring 24 toward the right positioning ring 23, and in the adjacent core adapters 3 of the core adapter group 4, the bottom surface of the annular groove 9 of one of the core adapters 3, respectively. And the end face of the end portion 17 of the annular body 6 of the other core adapter 3 is brought into contact with the sphere 10, and the left positioning ring 24 is fixed to the central drive shaft 2 in this state. Thereby, the core adapter group 4 is restrained at a predetermined position on the center drive shaft 2 as shown in FIG. Further, since the annular main bodies 6 of the core adapters 3 that are adjacent to each other in the core adapter group 4 are in contact with each other with the rolling bearings 13 in between, the core adapters 3 are accurate even without attaching a spacer between the cores. The core C on the core adapter 3 is also accurately positioned.

  After that, when the leading end of the belt-like sheet S is fixed to each core C and the center drive shaft 2 is rotationally driven in the direction indicated by the arrow A1 in FIG. 2, the annular body 6 of the core adapter 3 is interposed with the friction member 23. Thus, the rotational force of the center drive shaft 2 is transmitted. On the other hand, a rotational resistance corresponding to the tension of the belt-like sheet S is generated in the winding core C. Therefore, the core C tries to rotate in the direction opposite to the direction indicated by the arrow A1 in FIG. 2 with respect to the annular body 6 of the core adapter 3, whereby each roller 12 moves to the shallower side of the bottom inclined groove 11. Since the annular engagement body 14 is pushed up to increase the outer diameter of the annular engagement body 14, the gripping force of the core C by the core adapter 3 increases. Even if a difference in winding diameter occurs between the winding rolls R during winding, the annular main bodies 6 of the adjacent core adapters 5 are in rolling contact with each other with the spherical body 10 interposed therebetween, so that the frictional resistance between them is small. Therefore, even if a difference occurs in the rotational speed during winding, the loss of winding torque due to friction between the annular bodies 6 can be greatly reduced. Further, since the core C and the friction member 23 are not in direct contact with each other, a core having a relatively low mechanical strength such as a paper tube or a synthetic resin tube can be used.

  Although the present invention has been described with reference to one embodiment, the embodiments of the present invention can be variously changed as necessary without changing the gist of the invention. For example, the core adapter includes a rolling bearing 27 as shown in FIG. 5 instead of the sphere 10 and the annular groove 9 shown in FIG. 3, and the annular main body of the core adapter 3 that is adjacent to each other in the core adapter group. The six members may be in contact with each other with the rolling bearing 27 interposed therebetween. The rolling bearing 27 shown in FIG. 5 is a four-point contact ball bearing, and its outer ring 26a is mounted in a hole formed at one end of the annular main body 6, and the end surface of the inner ring 26b has an adjacent core adapter. The end surface of the end portion 17 of the annular main body 6 contacts. According to the invention, the winding core fixing means includes, for example, a plurality of engaging members each having an engaging portion extending parallel to the central axis of the annular body or an engaging portion arranged along the central axis of the annular body. It is configured to be pressed against the inner peripheral surface of the ring and to be clamped by sandwiching both end surfaces of the core with a collar of the annular body and a clamping ring attached to the annular body on the opposite side of the collar. It may be a thing.

S belt-like sheet C winding core R winding roll 1 friction winding shaft 2 central drive shaft 3 winding core adapter 4 winding core adapter group 5 winding core adapter positioning means 6 annular body 7 鍔 8 winding core fixing means 9 annular groove 10 sphere 11 bottom surface Inspection groove 12 Roller 13 Retainer 14 Annular engagement body 15 Telescopic member 16 Bolt 17 Bolt 18 End part 22 of the annular body on the sphere side Piston 23 Friction member 24 Positioning ring 25 Positioning ring 26 Sphere 27 Rolling bearing

Claims (3)

  A friction winding shaft that holds a plurality of winding cores penetrating at predetermined intervals and winds a belt-like sheet all around the winding core at the same time, comprising a central drive shaft and the winding core at the center An annular core adapter for each core to be mounted on the outer periphery of the drive shaft, and the rotational force of the center drive shaft to each core adapter, and the core adapter slips individually with respect to the center drive shaft A winding that constrains a winding force transmitting means for transmitting in a rotatable manner and a winding core adapter group consisting of a winding core adapter for each winding core through which the central driving shaft passes, to a predetermined position in the longitudinal direction of the central driving shaft. The core adapter group positioning means, and the core adapter includes an annular body that is externally attached to the central drive shaft, a collar provided at one end of the annular body, and a core that is externally attached to the annular body. Fixed on the annular body A core fixing means, an annular groove formed concentrically with the annular main body on one end surface of the annular main body, and a plurality of spheres accommodated in the annular groove, are adjacent to each other in the core adapter group. A friction winding shaft characterized in that the annular main bodies of the core adapter are in contact with each other with the sphere interposed therebetween.   Instead of providing the annular groove and the spherical body, each of the annular main bodies of the core adapters provided with a rolling bearing attached to at least one end of the annular main body and adjacent to each other in the core adapter group is described above. The friction winding shaft according to claim 1, which is in contact with each other with a rolling bearing interposed therebetween. The winding core fixing means is individually disposed in the bottom inclined groove which is disposed in at least three locations in the circumferential direction of the outer peripheral surface of the annular main body and gradually deepens in the rotation direction of the central drive shaft, and the bottom inclined groove. A plurality of rollers, an annular retainer rotatably fitted on the outer periphery of the annular body, and an expandable and contractible annular engagement member surrounding the plurality of rollers. When the winding core is not extrapolated to the outer periphery of the annular body, a rotational force is applied to the retainer so as to return to a standby position where the diameter of the circle circumscribing the outer periphery of the annular engagement body is larger than the inner diameter of the winding core. The friction winding shaft according to claim 1 or 2, further comprising an elastic member that is elastically expandable and contractable, provided between the retainer and the annular main body.

Images