JP4887992B2 - Winding shaft chuck and winding method - Google Patents

Description

  The present invention relates to a take-up shaft chuck used in a take-up device for taking up a sheet-like material such as paper, film, or woven fabric, or various fibers onto a tubular core such as a paper tube.

  2. Description of the Related Art Conventionally, in a winding device for winding a sheet or fiber, a chuck is provided at the end of the winding shaft in order to mount a core such as a paper tube on the winding shaft. There are various types of chucks, and a utility model registration No. 2501483 that can press the chuck to the inner surface of the core simply by inserting the chuck into the end of the core. Is shown in FIG. 5 shows the chuck 2 described in this publication. The chuck 2 is rotatably held at the tip of the take-up shaft 1 and is held by the chuck nose 3 so as to be movable in the axial direction. A small-diameter collar portion 4a is provided at the tip side, and a rear end side. A movable cylinder 4 having a large-diameter collar 4b, a ring-shaped pressing member 5 fixed to the chuck nose 3, a stopper 6 attached to the tip side of the chuck nose, and a stopper 6 on the tip side of the movable cylinder 4 A spring 7 that is urged so as to press against the ring, and a ring-shaped rubber tube 8 that is disposed on the outer peripheral surface of the movable cylinder 4 and between the flange 4a and the pressing member 5 and encloses a fluid such as air. I have. In the state where the core 9 is not attached, the chuck 2 has the movable cylinder 4 moved to the distal end side by the spring 7 as shown in FIG. 5, and the interval between the collar portion 4a and the pressing member 5 is widened. Although the outer diameter of the rubber tube 8 disposed between them is smaller than the inner diameter of the core 9, when the core 9 is mounted, as shown in FIG. On the other hand, when the chuck 2 is moved in the direction of the arrow and the chuck 2 is inserted into the end portion of the core 9, the collar portion 4 b on the rear end side of the movable cylinder 4 abuts against the end surface of the core 9 and the movement is prevented. The movable cylinder 4 moves in the axial direction with respect to the chuck nose 3, the distance between the flange portion 4a on the distal end side and the pressing member 5 is narrowed, and the rubber tube 8 is compressed, whereby the outer diameter of the rubber tube 8 is expanded. And crimping to the inner surface of the core 9 to fix the core 9 to the chuck 2Thus, the core can be automatically fixed and held by simply inserting the chuck 2 into the end of the core 9.

However, it has been found that the chuck 2 has the following problems.
(1) In a state where the core is fixed, the rubber tube 8 is pressure-bonded to the inner surface of the core and the outer peripheral surface of the movable cylinder, but when the chuck 2 is pulled out of the core for removing the core, the spring 7 Even if the movable cylinder 4 is pushed by this and the interval between the collar portion 4a and the pressing member 5 is widened, the hollow rubber tube 8 can be kept in contact with the inner surface of the winding core and the outer circumferential surface of the movable cylinder because the restoring force is small. Yes, the core may not be removed. Further, the rubber tube may be twisted when the core is removed. Further, there are cases where the moving tube 4 is moved by the spring 7 in a state where the rubber tube 8 is in contact with the inner surface of the winding core and the outer peripheral surface of the moving tube. On the other hand, if the pressing force of the spring 7 is too strong, it is difficult to securely mount and hold the core, and eventually it is difficult to set the spring force of the spring 7.
(2) The rubber tube 8 enclosing a fluid such as air used for fixing the core is expensive. Also, it may be torn during use, and if it is torn, it cannot be used, so the service life is short.
(3) As a mechanism for fixing the pressing member 5 used for compression of the rubber tube 8 to the chuck nose 3, support portions extending radially inward from a plurality of locations on the inner peripheral surface of the pressing member 5 are provided on the outer peripheral surface of the chuck nose. Although the fixing structure is adopted, the rigidity of the support portion cannot be increased with this structure, and therefore, the compression force applied to the rubber tube 8 cannot be increased so much, and the core of the compressed rubber tube 8 is reduced. There are cases where the crimping force on the inner surface is insufficient.
(4) Although a paper tube may be used as the winding core, the paper tube is usually not chamfered, and is applied to the end of the winding core (paper tube) 9 as shown in FIG. 10 may remain, but as shown in FIG. 6B, when removing the core 9 and pulling out the chuck 2 from the core 9, the flash 10 is pressed against the collar 4b of the movable cylinder 4. There is a case where it is difficult to remove the winding core by being caught between the members 5.

Utility Model Registration No. 2501483

  The present invention has been made in view of such problems, and by only inserting it into the inner surface of the end portion of the core, some parts are projected in the outer diameter direction and are crimped to the inner surface of the core. In a chuck that can be held, the core can be easily attached and removed, the core can be fixed with the required strength, and a conventionally used rubber tube filled with air or other fluid It is an object of the present invention to provide a chuck that can use parts that are cheaper and have a longer life.

  Another object of the present invention is to provide a chuck in which even if a flash remains at the end portion of the paper tube used as the winding core, the flash is not caught and difficult to remove.

The invention according to claim 1 of the present invention for solving the above-mentioned problems is a chuck provided at the tip of a winding shaft and detachably supporting a tubular winding core, and the winding shaft includes the winding shaft. a movable stopper is rotated to the axis integrally movably held in the axial direction, of the take-up shaft, fixedly provided at the winding shaft distal end side than the movable stopper, supporting the ring-like elastic material An elastic material support cylinder having a cylindrical surface and a flange portion disposed at the end of the cylindrical surface on the movable stopper side as an integral structure, and a ring having a solid structure held on the cylindrical surface of the elastic material support cylinder and Jo elastic material of the winding shaft, the distal end side of the elastic member support cylinder, a pressing member which is movably held in but axially rotate integrally with the take-up shaft, the elastic Move along the cylindrical surface of the material support cylinder to push the ring-shaped elastic material in the direction of the winding axis. A pressing member having a possible annular collar, and connecting means for connecting the movable stopper and the pressing member together so that the movable stopper and the pressing member move in the axial direction together, and the movable stopper can support the end surface of the core The elastic material support cylinder, the ring-shaped elastic material, and the pressing member each have a maximum outer diameter that is larger than the inner diameter of the core so that the elastic member can be inserted into the end of the core. And the ring-shaped elastic material projects outwardly and is crimped to the inner surface of the core when compressed in the axial direction by the collar portion of the elastic material supporting cylinder and the collar portion of the pressing member. The gist of the chuck is a take-up shaft characterized by having a cross-sectional shape and dimensions determined as possible.

  According to a second aspect of the present invention, in the chuck according to the first aspect of the present invention, a plurality of the ring-shaped elastic members having the solid structure are arranged side by side on the cylindrical surface of the elastic material supporting cylinder. It is.

  The invention according to claim 3 is the chuck according to claim 2, wherein the number of the ring-shaped elastic members is 2 to 10.

  The invention according to claim 4 is the chuck according to any one of claims 1 to 3, wherein the ring-shaped elastic member is formed of an O-ring having a circular cross section.

  According to a fifth aspect of the present invention, in the chuck according to any one of the first to fourth aspects, the flange portion of the elastic material supporting cylinder faces the outer diameter toward the end surface facing the movable stopper. Accordingly, a tapered surface is formed so as to be separated from the movable stopper.

  The invention according to claim 6 is characterized in that a winding core is mounted on the chuck of the winding shaft according to any one of claims 1 to 5, and a sheet-like material is wound on the winding core. It is a winding method to do.

  In the chuck of the present invention, when the chuck is inserted into the inner end of the core when the core is mounted, the movable stopper abuts against the end surface of the core and is prevented from moving, and the movement of the pressing member connected thereto is also prevented. The interval between the collar portion of the elastic material supporting cylinder and the collar portion of the pressing member is narrowed, and the plurality of ring-shaped elastic materials arranged between them are compressed in the axial direction of the take-up shaft and protruded outward to It can be crimped to the inner surface of the core. For this reason, the core can be fixed and held by the chuck simply by inserting the chuck into the end of the core. Further, when pulling out the chuck from the winding core, the movable stopper and the pressing member connected thereto can be moved with respect to the winding shaft by pulling out the chuck, and the restoring force of the ring-shaped elastic member allows the elastic material supporting cylinder to move. The interval between the flange portion and the flange portion of the pressing member is widened, and the ring-shaped elastic material itself is reduced in diameter and separated from the inner surface of the core. Thereby, the chuck can be easily pulled out from the winding core. As described above, the chuck of the present invention can mount and remove the core with a simple operation.

  Furthermore, in the chuck according to the present invention, a solid ring-shaped elastic material is used as a part to be crimped to the inner surface of the core, so that it can be broken like a rubber tube filled with a fluid such as air that has been used conventionally. It can be used without any problem even if the surface is worn slightly and has a long service life. Moreover, the ring-shaped elastic material having a solid structure is available at a low cost, and the cost can be reduced. Furthermore, by using a ring-shaped elastic material having a solid structure, when the ring-shaped elastic material is compressed, the ring-shaped elastic material is reliably deformed in a direction perpendicular to the compression direction, and the inner surface of the core is Crimp with a large pressure. Moreover, as a mechanism for compressing the ring-shaped elastic material in the axial direction of the winding shaft, a collar portion formed at one end of the elastic material support cylinder and a collar formed on the pressing member movably held by the winding shaft. Since these members can be made to have a large rigidity, it is possible to apply a large compressive force to the ring-shaped elastic material. For this reason, the chuck | zipper of this invention can enlarge the fixing force with respect to a core, and can fix and hold | maintain a core reliably and firmly. Furthermore, when pulling out the chuck, the ring-shaped elastic material itself is reduced in diameter by widening the interval between the collar portion of the elastic material support cylinder and the collar portion of the pressing member by the restoring force (spring force) of the ring-shaped elastic material. The pressure bonding of the ring-shaped elastic material to the inner surface of the core can be reliably released, and the core can be easily removed. Moreover, since the space | interval of the collar part of an elastic material support cylinder and the collar part of a press member can be expanded with the restoring force (spring force) of a ring-shaped elastic material, it is like the spring 7 used in the prior art example shown in FIG. It is not necessary to use a dedicated spring for moving the collar portion, and the number of parts can be reduced.

  Although only one ring-shaped elastic material may be used for the chuck of the present invention, it is preferable that a plurality of ring-shaped elastic materials are used side by side. By using a plurality of ring-shaped elastic materials, the number of crimping points on the inner surface of the core can be increased to increase the fixing force of the core, and the ring-shaped elastic material can be compressed and stretched in the outer diameter direction. A large compression stroke can be taken out, and the core can be fixed and held more securely, and when the chuck is pulled out of the core, the elastic support cylinder is used by the restoring force of the ring-shaped elastic material. The effect that the operation | movement which expands the space | interval of the collar part of a collar part and the collar part of a press member can be produced stably is acquired.

  When using a plurality of ring-shaped elastic materials, the greater the number used, the greater the number of crimping points to the core and the greater the fixing force of the core, but the greater the number, the greater the number of parts and the larger the chuck. turn into. In consideration of these, the number of ring-shaped elastic materials used is preferably 2 to 10, more preferably 3 to 6.

  The cross-sectional shape of the ring-shaped elastic material is arbitrary, such as a circle, an ellipse, an oval, etc., but when using a plurality of them arranged side by side as described above, a circular cross-section is preferable because it can be obtained at low cost, Furthermore, it is more preferable to use a commercially available O-ring having a circular cross section as the ring-shaped elastic material. On the other hand, when a single ring-shaped elastic material is used or when a small number of ring-shaped elastic materials are used, the cross-sectional shape of the ring-shaped elastic material is an ellipse or an oval shape in which the axial direction of the winding shaft is the major axis. A flat shape such as the above is preferable. When the cross-sectional shape of the ring-shaped elastic material is a flat shape, the compression stroke and the amount of protrusion in the outer diameter direction can be increased when the ring-shaped elastic material is compressed and protruded in the outer diameter direction. Even when a small number of ring-shaped elastic materials are used, the core can be securely fixed and held, and when pulling out the chuck from the core, the elastic material support cylinder collar is pulled by the restoring force of the ring-shaped elastic material. The operation of widening the interval between the flange portion and the flange portion of the pressing member can be stably generated. When the cross-section of the ring-shaped elastic material is flat, it is preferable that the minor axis to major axis in the no-load state be about 1.5 to 1: 5.

  In the chuck of the present invention, when the tapered portion is formed on the end surface of the flange portion of the elastic material support cylinder facing the movable stopper, the elastic material support cylinder is placed in the outer peripheral region even when the elastic material support tube is abutted against the movable stopper. A large gap is generated, and even if a flash remains on the end surface of the core, the flash is not pinched, and the effect that the core can be easily removed is obtained.

  When the above-described chuck is used to fix and hold the core, and the sheet-like material is wound on the core, the core is surely fixed and held by the chuck. The sheet does not slip with respect to the chuck and unevenness in the transmission of rotational force does not occur. Therefore, the sheet can be wound stably and satisfactorily.

  Hereinafter, embodiments of the present invention shown in the drawings will be described. 1 is a schematic cross-sectional view showing a chuck according to a preferred embodiment of the present invention. FIGS. 2A and 2B are schematic cross-sectional views taken along arrows AA and BB, respectively, of FIG. FIG. 3 is a schematic cross-sectional view showing the chuck with the winding core mounted, and FIG. 4 is a schematic cross-sectional view showing the chuck being pulled out of the winding core. 1 to 4, 11 is a winding shaft, 12 is a chuck provided at the tip of the winding shaft 11, and 13 is a stopper fixed to the winding shaft 11. The chuck 12 includes a movable stopper 14, an elastic material support cylinder 16, a pressing member 18, a cover 20, a plurality of ring-shaped elastic materials 22, and the like. The movable stopper 14 is held so as to be movable in the axial direction with respect to the take-up shaft 11, but is connected to rotate integrally with a key 24. Further, the movable stopper 14 includes a support surface 14 a having a diameter capable of supporting the end surface of the winding core 26 to be held on the front end side of the winding shaft 11 and perpendicular to the central axis of the winding shaft 11. Is inserted into the end of the core 26, the support surface 14 a abuts against the end surface of the core 26 and is prevented from further movement. The stopper 13 fixed to the winding shaft 11 hits the movable stopper 14 when the movable stopper 14 is pushed by the end surface of the winding core 26 and moves in the rear end direction with respect to the winding shaft 11. This is for determining the stop position of the movable stopper 14.

The elastic material support cylinder 16 is connected to the take-up shaft 11 through a key 24 so as to rotate integrally, and is fixed by a screw 27 so as not to move in the axial direction. The elastic material support cylinder 16 includes a cylindrical surface 16a for holding a plurality of ring-shaped elastic materials 22 side by side, and a flange portion 16b disposed at the end of the cylindrical surface 16a on the movable stopper side as an integral structure. ing. The collar portion 16 b includes a support surface 16 c perpendicular to the cylindrical surface on the cylindrical surface 16 a side, and can support the ring-shaped elastic material 22 in the axial direction of the winding shaft 11. Further, the collar portion 16b is formed on the opposite surface, that is, the end surface facing the movable stopper 14, on the tapered surface 16d so as to be separated from the movable stopper 14 toward the outer diameter, as shown in FIGS. As shown, a large gap 28 can be formed in the vicinity of the outer periphery of the flange portion 16b in a state where the movable stopper 14 and the elastic material support cylinder 16 are in close contact with each other. The maximum outer diameter of the collar portion 16 b is set to be slightly smaller (for example, about 1 to 3 mm) than the inner diameter of the core 26, and the collar portion 16 b can be inserted into the core 26.

Pressing member 18, the winding shaft 11, the distal end side than the elastic member support cylinder 16, but rotates integrally with the winding shaft 11 is held movably in the axial direction. The outer peripheral portion of the pressing member 18 includes an annular collar portion 18a that moves along the cylindrical surface 16a of the elastic material support cylinder 16 and can press the ring-shaped elastic material 22 in the winding axis direction. A support surface 18b perpendicular to the axial direction of the winding shaft is formed at the tip of the collar portion 18a. The maximum outer diameter of the pressing member 18 is also set slightly smaller (for example, 1 to 3 mm) than the inner diameter of the core 26 and can be inserted into the core 26. Further, a tapered surface 18 c is formed on the outer peripheral surface of the pressing member 18 so as to facilitate insertion into the core 26. The pressing member 18 is connected by connecting means (bolt 29 in this embodiment) so as to move in the axial direction together with the movable stopper 14. Thus, as will be described later, when the movable stopper 14 is prevented from moving by the end face of the core 26 when the chuck 12 is inserted into the end of the core 26, the pressing member 18 is also prevented from moving together. Thus, since the elastic material support cylinder 16 continues to enter the core 26, the gap between the collar portion 16b of the elastic material support cylinder 16 and the collar portion 18a of the pressing member 18 is narrowed. Here, the distance between the movable stopper 14 connected by the bolt 29 and the pressing member 18 is such that the movable stopper 14 and the winding member 14 are wound in the state where the movable stopper 14 is in contact with the elastic material support cylinder 16 as shown in FIG. The distance d between the shaft 11 and the stopper 13 is determined to be equal to or slightly smaller than the distance e between the end face of the elastic material support cylinder 16 and the end face of the pressing member 18 facing it. With this configuration, when the chuck 12 is inserted into the core 26, the movable stopper 14 can be pushed in at the end surface of the core 26 until it abuts against the stopper 13 of the winding shaft 11, as shown in FIG. it can.

  A plurality of ring-shaped elastic members 22 are held side by side on the cylindrical surface 16 a of the elastic member support tube 16. The ring-shaped elastic member 22 is of a solid structure made of an elastic material such as rubber, and is elastically compressed and deformed in the axial direction of the take-up shaft 11 so as to project in a direction perpendicular to the compression direction. Is possible. Here, the cross-sectional shape, dimensions, and number of used ring-shaped elastic members 22 are determined so as to achieve the following functions. That is, as shown in FIG. 1, in a state where the chuck 12 is not inserted into the winding core, a plurality of ring-shaped elastic members arranged between the flange portion 16b of the elastic material support cylinder 16 and the flange portion 18a of the pressing member 18 are used. 22 is in a state of being slightly compressed in the direction of the take-up axis, and a restoring force (spring force) is applied to the pressing member 18 in the direction of the arrow C, and is connected to the pressing member 18 with a bolt 29. The movable stopper 14 is positioned at a position (initial position) where it abuts against the elastic material support cylinder 16 and is held at that position. At this time, the maximum outer diameter of the ring-shaped elastic material 22 is slightly smaller than the inner diameter of the core 26, and the ring-shaped elastic material 22 can be inserted into the core 26. On the other hand, as shown in FIG. 3, the movable stopper 14 is pressed to the stopper 13 of the winding shaft 11 at the end face of the winding core 26, and the pressing member 18 connected to the movable stopper 14 by a bolt 29 is used as an elastic material support cylinder. When moved in a direction approaching the collar portion 16b, the plurality of ring-shaped elastic members 22 is compressed and deformed in the axial direction of the take-up shaft by the collar portion 16b of the elastic material support tube 16 and the collar portion 18a of the pressing member 18. Along with this, it projects outward and is crimped to the inner surface of the core 26 to fix and hold the core 26 with a desired strength.

  The ring-shaped elastic material 22 has only to determine a cross-sectional shape, dimensions, and the number of pieces used so that the above-described action can be achieved. Examples of the cross-sectional shape include a circle, an ellipse, and an oval. As the number of the ring-shaped elastic members 22 used increases, the number of pressure-bonding portions to the inner surface of the core can be increased to increase the fixing force of the core, and the ring-shaped elastic member 22 can be used in the axial direction of the winding shaft. The compression stroke can be increased when the cylinder is compressed and extended in the outer diameter direction, the core can be fixed and held more securely, and when the chuck is pulled out from the core, the ring is elastic. The restoring force of the material 22 can stably cause the operation of widening the interval between the collar portion 16b of the elastic material support cylinder 16 and the collar portion 18a of the pressing member 18, but the fixing force and compression stroke of the core are limited to some extent. It only needs to be large, and it need not be larger than necessary. In consideration of these, the number of ring-shaped elastic members 22 used is preferably 2 to 10, more preferably 3 to 6. As the ring-shaped elastic material 22, a material having a desired cross-sectional shape made of an elastic material such as rubber may be used, for example, a circle or an ellipse. The ring-shaped elastic material is preferable because it can be obtained at low cost.

The cover 20 is fixed to the front end of the winding shaft 11 with a bolt 33. When the pressing member 18 is pushed in the direction of the arrow C by the restoring force of the ring-shaped elastic material 22 and the movable stopper 14 connected thereto by the bolt 29 moves to a position where it abuts against the elastic material supporting cylinder 16, The pressing member 16 is attached so as to be in a position substantially in contact with the cover 20. A tapered surface 20 a is formed on the outer peripheral surface of the cover 20 at a position that is an extended surface of the tapered surface 1 8 c of the pressing member 18.

  Next, the core holding operation and the core removal operation by the chuck 12 having the above-described configuration will be described. In a state where the core 26 is not attached to the chuck 12, the pressing member 18 is pushed in the direction of arrow C by the restoring force (spring force) in the winding axis direction of the plurality of ring-shaped elastic members 22 as shown in FIG. The movable stopper 14 connected thereto via a bolt 29 is held at an initial position where it hits the elastic material holding cylinder 16. Since the movable stopper 14 is held in the initial position by the spring force of the ring-shaped elastic member 22 in this way, the movable stopper 14 is not rattled, and the movable stopper 14 or the like can be used when the chuck 12 is inserted into the winding core. The pressing member 18 does not move carelessly and causes trouble. Further, it is not necessary to use a dedicated spring material (for example, the conventional spring 7 shown in FIG. 5) to hold the movable stopper 14 in the initial position, and the number of parts can be reduced.

  Next, in order to attach the winding core 26 to the chuck 12, as shown in FIG. 3, the winding shaft 11 is advanced in the axial direction, and the chuck 12 held at the tip is held in a predetermined position. It is inserted into the end of the winding core 26. During this insertion, the movable stopper 14 abuts against the end face of the core 26 and is prevented from moving. Accordingly, the pressing member 18 is also prevented from moving, but after that, the winding shaft 11 and the stopper 13 are movable stopper 14. Advance until it hits. As a result, the elastic material holding cylinder 16 fixed to the take-up shaft 11 also advances, and the interval between the flange portion 16b of the elastic material support tube 16 and the flange portion 18a of the pressing member 18 is reduced and disposed between the two. The plurality of ring-shaped elastic members 22 are compressed in the direction of the take-up shaft axis, are projected outward, and are crimped to the inner surface of the core 26. Thus, simply by inserting the chuck 12 into the end of the core 26, the ring-shaped elastic member 22 is deformed and strongly contacts the cylindrical surface 16a of the elastic material support cylinder 16 and the inner surface of the core 26. The core 26 can be firmly fixed and held on the chuck 12.

  Next, in order to remove the winding core 26 from the chuck 12, as shown in FIG. 4, the winding shaft 11 is retracted in the axial direction, and the chuck 12 is pulled out from the winding core 26. During this pulling, the pressing member 18 is pushed in the direction opposite to the pulling direction by the restoring force of the ring-shaped elastic material 22 that has been elastically deformed, so that the collar 16b of the elastic material support tube 16 and the collar of the pressing member 18 The space | interval of the part 18a expands and the outer diameter of ring-shaped elastic material 22 itself shrinks. Thus, the pressure bonding of the ring-shaped elastic material 22 to the inner surface of the core 26 is released, and the chuck 12 is easily pulled out from the core 26. In this way, the core 26 can be removed from the chuck 12 simply by performing an operation of pulling out the chuck 12 from the end of the core 26. By the way, when a paper tube is used as the winding core 26, depending on the paper tube, a flash 34 may be generated on the end surface. However, even if there is a flash 34 at the end of the paper tube, as shown in FIG. 4, when the movable stopper 14 and the elastic material support cylinder 16 come into close contact with each other in the middle of pulling out the chuck 12 from the core 26. However, a larger gap 28 is formed in the taper 16d in the outer peripheral region of the elastic material support cylinder 16, and the flash 34 is not sandwiched. Thus, even when the core 26 with the flash 34 remaining is used, the core 26 can be easily detached from the chuck 12.

  As described above, the chuck 12 according to this embodiment is configured to fix and hold the solid elastic ring-shaped elastic member 22 on the inner surface of the core 26. By using this ring-shaped elastic material 22, the following advantages are obtained. That is, the ring-shaped elastic member 22 having a solid structure is not broken and cannot be used like a conventional rubber tube filled with a fluid such as air, and there is no problem even if the surface is slightly worn. Since it can be used, it has a long service life. Moreover, the ring-shaped elastic material having a solid structure is available at a low cost, and the cost can be reduced. Furthermore, by using a ring-shaped elastic material having a solid structure, when the ring-shaped elastic material is compressed, the ring-shaped elastic material is reliably deformed in a direction perpendicular to the compression direction, and the inner surface of the core is Crimping with a large pressing force, and by using a plurality of ring-shaped elastic materials, it is crimped to the inner surface of the core at a plurality of locations. For this reason, the fixing force to the core is large, and the core is securely and firmly fixed. Can be held. Further, in the chuck 12 according to the above-described embodiment, it is formed at one end of the elastic material support cylinder 16 that supports the ring-shaped elastic material 22 as a mechanism for compressing the ring-shaped elastic material in the axial direction of the winding shaft. The collar portion 16b and the collar portion 18a formed on the pressing member 18 held movably on the winding shaft 11 are used. However, since these members can be made to have a large rigidity, a plurality of rings are used. A large compressive force can be applied to the elastic member 22. Also from this point, the fixing force of the core 26 by the chuck 12 can be increased.

  The chuck 12 having the above-described configuration can be used for various types of winding devices, but is particularly preferably used for a sheet-like material winding device. In the sheet winding device, the core 26 is fixed and held using the chuck 12, and when winding the sheet on the winding core 26, the winding core 26 is firmly fixed by the chuck 12. Since it can be held, the winding core 26 does not slide with respect to the chuck 12 during winding and unevenness in rotational force transmission does not occur, so that the sheet can be wound stably and satisfactorily.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and can be appropriately changed within the scope of the claims. For example, in the above-described embodiment, a plurality of ring-shaped elastic materials 22 are used, but it may be modified so that one ring-shaped elastic material is used. In addition, when using one ring-shaped elastic material, it is preferable to use a flat shape such as an ellipse having a major axis in the axial direction of the winding shaft. A large pressure-bonding force can be obtained, which is preferable.

Schematic sectional view showing a chuck according to a preferred embodiment of the present invention. (A), (b) is respectively AA arrow schematic sectional drawing of FIG. 1, BB arrow schematic sectional drawing 1 is a schematic cross-sectional view showing the chuck shown in FIG. 1 with a winding core attached. 1 is a schematic sectional view showing the chuck shown in FIG. Schematic sectional view showing an example of a conventional chuck (A), (b) is schematic sectional drawing explaining operation | movement of the chuck | zipper shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Winding shaft 12 Chuck 13 Stopper 14 Movable stopper 14a Support surface 16 Elastic material support cylinder 16a Cylindrical surface 16b Collar part 16c Support surface 16d Tapered surface 18 Press member 18a Collar part 18b Support surface 18c Tapered surface 20 Cover 22 Ring-shaped elastic material 24 key 26 core 27 screw 28 gap 29 bolt 33 bolt 34 beam

Claims (6)

A chuck that is provided at the tip of the winding shaft and detachably supports a tubular winding core. The chuck rotates on the winding shaft integrally with the winding shaft but is movably held in the axial direction. A movable stopper and a winding surface of the winding shaft that is fixed to the distal end side of the winding shaft with respect to the movable stopper, and is disposed at the end of the cylindrical surface on the movable stopper side that supports the ring-shaped elastic material. an elastic member supporting cylinder having as a unitary structure a flange that is, a ring-shaped elastic member of solid construction which is held in the cylindrical surface of the elastic member support cylinder, said take-up shaft, from the elastic member support tube A pressing member that rotates integrally with the take-up shaft on the tip side, but is held so as to be movable in the axial direction, and moves along the cylindrical surface of the elastic material support cylinder, and the ring-shaped elastic material A pressing member having an annular collar portion capable of pressing in the axial direction of the take-up shaft, and the movable stop. And a pressing member are connected to each other so as to move together in the axial direction, and the movable stopper includes a support surface having a diameter capable of supporting the end surface of the core, the elastic material support cylinder, Each of the ring-shaped elastic material and the pressing member has a maximum outer diameter determined to be smaller than the inner diameter of the core so that the ring-shaped elastic material can be inserted into the end portion of the core, The cross-sectional shape and dimensions are determined so that when compressed in the axial direction by the flange portion of the elastic material supporting cylinder and the flange portion of the pressing member, the elastic material support tube projects outward and can be crimped to the inner surface of the core. Take-up shaft chuck.   2. A chuck for a take-up shaft according to claim 1, wherein a plurality of the ring-shaped elastic members having a solid structure are arranged side by side on a cylindrical surface of the elastic material supporting cylinder.   3. The take-up shaft chuck according to claim 2, wherein the number of the ring-shaped elastic members is 2 to 10.   The chuck of the take-up shaft according to any one of claims 1 to 3, wherein the ring-shaped elastic member is formed of an O-ring having a circular cross section.   5. A tapered surface is formed on an end surface of the flange portion of the elastic material support cylinder on the side facing the movable stopper so as to move away from the movable stopper toward the outer diameter. The chuck of the winding shaft as described in any one of the above.   6. A winding method comprising: mounting a winding core on the chuck of the winding shaft according to claim 1; and winding a sheet-like material on the winding core.

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