JP2020037472A - Winding device of sheet-like product around wound pipe - Google Patents

Abstract

To provide a winding device, in which a plurality of cylinder units each rotating integrally with a winding shaft and a plurality of chuck units each rotatably fitted onto the winding shaft and retaining a wound pipe on the outer-peripheral side are alternately arranged in the axial direction of the winding shaft in parallel, the device capable of equalizing winding torque of a sheet-like product around the wound pipe in the plurality of chuck units by simple adjustment work.SOLUTION: In a part of a plurality of air cylinders 20a of a cylinder unit 14, a piston 24a is formed with a first notched part 64 for regulating an advance action of the piston from the inside of a cylinder hole 22a as a result of a stepped bottom part of an end thereof engaging with an engagement piece 70 and a second notched part 66 for permitting an advance action of the piston from the cylinder hole. The winding device is structured to selectively regulate an action of the piston in the plurality of air cylinders with the notched part formed in the piston and change the number of pistons pressed by a front end against of a friction ring 40 of a chuck unit 16 to permit a contact area between the friction ring and the plurality of pistons to be adjusted.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method for winding a sheet-shaped product used in an operation of winding various sheet-shaped products (webs) such as a long strip-shaped plastic film, paper, non-woven fabric, metal foil, etc. around a core tube. It relates to a taking device.

  As a winding device for a sheet-like product that winds a long strip-shaped plastic film, paper, non-woven fabric, metal foil, etc. into a winding tube, it is provided with a hollow driven winding shaft that is concentrically fixed to the winding shaft. A plurality of ring-shaped cylinder units that rotate integrally with the winding shaft and a plurality of ring-shaped chuck units that are mounted concentrically on the winding shaft and that can rotate with respect to the winding shaft are alternately arranged in parallel in the axial direction of the winding shaft. The chuck unit is provided with a plurality of chuck members around a circumference of an outer peripheral portion thereof, and the plurality of chuck members integrally hold a winding tube detachably from an inner peripheral surface side thereof. In the cylinder unit, a plurality of cylinder holes, which are arranged parallel to the axis of the winding shaft and are opened on the annular side surface facing the chuck unit, are formed around the circumference, and in each of the cylinder holes, Hollow shaft An air cylinder is provided in which a piston whose front end advances and retreats from an annular side opening by compressed air supplied to a cylinder hole through an air path formed in a tube wall of a winding shaft and a cylinder unit, and a chuck unit. A structure in which a friction ring against which the tip of the piston of the cylinder unit presses directly or indirectly is provided so as to rotate integrally with the chuck unit, and is integrally formed with the winding shaft driven to rotate. The rotational power of the rotating cylinder unit is transmitted to the chuck unit by the frictional force between the tip of the piston of the cylinder unit and the friction ring, and the winding unit held by the chuck unit via the chuck member is rotated. 2. Description of the Related Art There is known an apparatus configured to wind a sheet-shaped product around a winding tube (for example, see Patent Document 1). ).

  When winding various sheet-like products into a winding tube using an apparatus having the above-described configuration, for example, a long strip-shaped film cut to a narrow width by a slitter for shredding is integrated with a chuck unit. In order to wind the film with a uniform tension when the film is wound on a winding tube held in a fixed manner, the rotational power of the cylinder unit that rotates integrally with the winding shaft that is driven to rotate is applied to the piston tip of the cylinder unit. It is necessary that the torque transmitted to the chuck units by the frictional force with the friction ring and generated in the chuck units does not vary between the chuck units. In this case, 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] )), It is easy to make the generated torque of the chuck unit uniform. However, since the friction coefficient varies from one piece 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 to adjust the pressure of the compressed air supplied to the air cylinder of the cylinder unit. Need to be adjusted.

  For example, in the sheet-like product winding device having the above-described configuration, in the cylinder unit, a plurality of other cylinder holes arranged in parallel with the axis of the winding shaft and opened on the annular side surface opposite to the normal cylinder hole are provided. A chuck unit that is formed around the circumference, and the leading end of the piston advances from the annular side opening by the supply of compressed air to each of the other cylinder holes, and the piston end of a normal air cylinder presses against the friction ring. A long piston for torque adjustment capable of contacting a contact ring provided on an adjacent chuck unit disposed on the opposite side, and a short piston for torque adjustment that cannot contact the contact ring even when compressed air is supplied. There has been proposed a device for selectively interpolating. In this device, the number of long pistons for torque adjustment pressed against the contact ring of the chuck unit is increased or decreased to reduce the difference in torque between the chuck units (for example, see Patent Document 2).

Japanese Patent No. 3588434 (page 3-4, FIG. 1) Japanese Patent No. 4002694 (page 3-4, FIG. 1)

  The sheet-shaped product winding device disclosed in Patent Document 2 has a cylinder unit provided with a plurality of air cylinders for torque adjustment separately from a normal air cylinder, and the length of a piston inserted into a cylinder hole of the air cylinder. By changing the number of pistons that function to transmit the rotational power of the cylinder unit to the chuck unit by changing the length of the cylinder unit, the difference in the winding torque of the sheet-like product on the winding tube between the chuck units can be reduced. What you want to do. However, in the device having such a configuration, it is necessary to prepare a large number of long pistons and short pistons for adjusting the torque, and the management thereof is troublesome. In addition, there is a problem that the replacement of the long piston and the short piston inserted into the cylinder hole of the air cylinder becomes very complicated.

  The present invention has been made in view of the above circumstances, and has a cylinder unit that is fixed concentrically to a hollow reel that is driven to rotate and that rotates integrally with the reel, and that is concentric with the reel. A sheet-like product winding device having a structure in which a plurality of chuck units which are mounted on a reel and are rotatable with respect to the winding shaft and integrally hold the winding tube by a chuck member are alternately arranged in parallel in the axial direction of the winding shaft. In the above, it is possible to equalize the winding torque of the sheet-like product on the winding tube in the plurality of chuck units, and it is possible to relatively easily perform the work for adjusting the torque. Another object of the present invention is to provide an apparatus.

According to the present invention, as means for achieving the above-mentioned object, instead of making the length of a piston inserted into a piston hole of a cylinder unit interchangeable as disclosed in Patent Document 2, a plurality of air cylinders of a cylinder unit are used. For some of these, the function of transmitting the rotational power of the cylinder unit to the chuck unit can be selectively stopped.
In other words, the invention according to claim 1 is a ring-shaped cylinder unit which is concentrically fixed to a rotatably driven hollow winding shaft and rotates integrally with the winding shaft, and which is concentrically and rotatably mounted on the winding shaft. A ring-shaped chuck unit which is detachably mounted integrally with a plurality of chuck members disposed around the circumference of the outer periphery so as to detachably hold the winding tube from the inner peripheral surface side thereof; A plurality of cylinder holes are arranged in parallel along the axial direction of the cylinder unit, and a plurality of cylinder holes which are arranged in parallel with the axis of the winding shaft and are opened on an annular side surface facing the chuck unit are formed around the circumference, In each of the cylinder holes, the piston is moved forward and backward from the annular side opening by compressed air supplied to the cylinder hole through an air passage formed in the hollow portion of the winding shaft and the tube wall of the winding shaft and the cylinder unit. And a friction ring against which the tip end of the piston of the cylinder unit directly or indirectly presses the chuck unit is rotated integrally with the chuck unit. The rotating power of the cylinder unit, which rotates integrally with the winding shaft that is provided and driven to rotate, is transmitted to the chuck unit by a frictional force between a tip end portion of the piston of the cylinder unit and the friction ring. In a device for winding a sheet-like product onto a winding tube, the winding tube held by the unit via the chuck member is rotated to wind the sheet-like product around the winding tube. At least a part of them is provided with a movement restricting means for preventing the piston from moving out of the cylinder hole. The movement restricting means are selectively operated, the number of pistons whose leading ends are pressed against the friction ring is changed, and the contact area between the friction ring and the plurality of pistons can be adjusted. .

  According to a second aspect of the present invention, in the winding device according to the first aspect, the movement restricting unit is disposed adjacent to or near the annular side opening of the cylinder hole of the air cylinder of the chuck unit or the cylinder unit. Alternatively, a locking piece is protruded in the vicinity of the annular side surface side opening of a part of the inner peripheral surface of the cylinder hole of the air cylinder, and the piston is engaged with the locking piece in the engaged state near the tip of the piston. An engaging portion is provided so that the tip portion is not in contact with the friction ring, and a part of the outer peripheral surface of the piston is notched in an axial direction at a different angle around the circumference with respect to the position of the engaging portion. The notch is formed so that the stepped bottom at the end of the notch does not engage with the locking piece and allows the piston to advance from the cylinder hole with the piston tip pressed against the friction ring. Set up and configure It is characterized in.

  According to a third aspect of the present invention, in the winding device according to the first aspect, the movement restricting means is formed with a through hole penetrating in a radial direction of the cylinder unit from an outer peripheral surface to a cylinder hole of the air cylinder. Along with a part of the peripheral surface of the piston of the air cylinder, a bottomed hole or a groove is formed at a position corresponding to the position where the through hole is formed in a state where the piston is retracted into the cylinder hole. A set screw or a locking pin, which is inserted into the through hole and whose tip engages with the bottomed hole or groove, is attached by attaching so that the tip can be removed from the bottomed hole or groove. It is characterized by.

In the sheet-like product winding device according to the first aspect of the present invention, the movement of the piston from the cylinder hole is suppressed by the movement restricting means provided on the air cylinder, and the piston is pressed against the friction ring of the chuck unit. It can be in a state where it does not touch. The contact area between the friction ring and the plurality of pistons can be adjusted by determining whether or not the plurality of air cylinders provided with the movement restricting means function as the movement restricting means. Therefore, the rotational power transmitted from the cylinder unit to the chuck unit can be adjusted by the frictional force between the tip of the piston and the friction ring, and the torque of winding the sheet-like product onto the winding tube in the chuck unit can be reduced. Can be adjusted.
Therefore, when the winding device according to the present invention is used, the winding torque of the sheet-like product on the winding tube in the plurality of chuck units can be equalized by a relatively simple operation. Eliminates the hassle of management.

  In the winding device of the invention according to claim 2, when the movement restricting means does not function, that is, when the piston tip of the air cylinder of the cylinder unit is pressed against the friction ring of the chuck unit, the piston Is rotated around an axis in the piston hole, and its angular position is set so that the notch portion comes to the projecting position of the locking piece. In this case, the stepped bottom of the notch does not engage with the locking piece in a state where the tip of the piston is pressed against the friction ring, so that there is no hindrance to the advancement of the piston from the cylinder hole. On the other hand, when functioning the movement restricting means, the piston is rotated around the axis in the piston hole and its angular position is set so that the engaging portion comes to the projecting position of the locking piece. At this time, the engaging portion engages with the locking piece, whereby the tip of the piston of the air cylinder is brought into a non-contact state with the friction ring, and the friction between the tip of the piston of the air cylinder and the friction ring is reduced. No more power. By performing such an operation for each of the plurality of air cylinders provided with the movement restricting means, the above-described effect according to the first aspect of the present invention is reliably achieved.

  In the winding device according to the third aspect of the present invention, when the movement restricting means does not function, that is, when the tip end of the piston of the air cylinder of the cylinder unit is pressed against the friction ring of the chuck unit, stop. The tip of the screw or locking pin is pulled out of the bottomed hole or groove formed in the piston peripheral surface of the air cylinder. On the other hand, when the movement restricting means functions, the set screw or the locking pin inserted into the through hole formed in the cylinder unit is engaged with the bottomed hole or the groove on the peripheral surface of the piston. Move to As a result, the movement of the piston advancing from the cylinder hole is restricted, and the tip of the piston of the air cylinder is brought into non-contact with the friction ring, and a frictional force is generated between the tip of the piston of the air cylinder and the friction ring. Disappears. By performing such an operation for each of the plurality of air cylinders provided with the movement restricting means, the above-described effect according to the first aspect of the present invention is reliably achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partial external appearance front view which shows an example of the structure of the winding apparatus of the sheet-shaped product to the winding pipe which concerns on this invention. It is a partial external appearance front view which shows another example of the structure of the winding apparatus of the sheet-shaped product to the winding pipe which concerns on this invention. FIG. 2 is a partial enlarged front view showing an example of an embodiment of the present invention and showing a main part of the winding device shown in FIG. 1 in a longitudinal section. FIG. 4 is a right side view of an appearance of a cylinder unit which is a component of the winding device illustrated in FIG. 3. FIG. 5 is an external front view of the cylinder unit shown in FIG. 4. FIG. 3 is a partially enlarged longitudinal sectional view for describing an operation of the winding device according to the present invention with reference to a combination of a cylinder unit and a chuck unit that are components of the winding device illustrated in FIG. 2. FIG. 7 is a partially enlarged longitudinal sectional view for explaining another operation different from that shown in FIG. 6 in the winding device according to the present invention. FIG. 8 is an external perspective view showing a modification of the piston of the air cylinder in the cylinder unit shown in FIGS. 3 to 7. FIG. 4 is a left side view of an external appearance of a cylinder unit, which is a component of the winding device shown in FIG. 3, according to another embodiment of the present invention. FIG. 10 is a partially enlarged longitudinal sectional view showing the cylinder unit shown in FIG. 9 together with a part of a chuck unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, an apparatus for winding a sheet-like product on a winding tube according to the present invention includes a winding shaft 12 which is supported in a horizontal position by a support / drive mechanism (not shown) and driven to rotate. A winding shaft portion 10a in which a plurality of ring-shaped cylinder units 14 and ring-shaped chuck units 16 having the same diameter are alternately arranged in parallel along the axial direction of the winding shaft 12. The winding shaft 12 is formed in a hollow shape, and the hollow portion serves as an air passage 18 and is connected to a compressed air source (not shown). The cylinder unit 14 is fixed concentrically to the outer peripheral surface of the reel 12, and rotates integrally with the reel 12. The chuck unit 16 is mounted concentrically on the outer peripheral surface of the winding shaft 12 and is rotatably held on the winding shaft 12 via a bearing as described later.

  FIG. 2 shows another configuration example of the winding shaft portion. Hereinafter, for convenience, members having the same function are denoted by common reference numerals and described. The winding shaft portion 10b has a plurality of ring-shaped chuck units 16 mounted concentrically and rotatably on the winding shaft 12 in parallel along the axial direction of the winding shaft 12, and adjacent chuck units 16, 16 A ring-shaped cylinder unit 14 whose outer diameter is smaller than the outer diameter of the chuck unit 16 is arranged between them, and these cylinder units 14 are concentrically fixed to the winding shaft 12. Therefore, also in the winding shaft portion 10b, a plurality of cylinder units 14 and chuck units 16 are alternately arranged in parallel along the axial direction of the winding shaft 12. Next, the configuration of the cylinder unit 14 and the chuck unit 16 will be described in more detail with reference to FIGS. 3 to 5, taking the winding shaft portion 10a shown in FIG. 1 as an example.

  In the ring-shaped cylinder unit 14, an air cylinder 20 a is opened around the one annular side surface facing the chuck unit 16, and an air cylinder 20 a is inserted into the cylinder hole 22 a and a piston 24 a advances and retreats from the opening. , And ten in the illustrated example. Further, a cylinder hole 22b is opened at an intermediate position between the adjacent air cylinders 20a, 20a on the other annular side surface facing the adjacent chuck unit 16, and the piston 24b is inserted and fitted into the cylinder hole 22b to advance and retreat from the opening. Each of the air cylinders 20b is provided. These air cylinders 20a and 20b are arranged in parallel with the axis of the winding shaft 12, respectively. In FIG. 3, different operation states of the cylinder unit 14 and the chuck unit 16 are also shown together in one drawing for convenience of explanation.

  A ventilation passage 26 communicating with the air passage 18 is formed in the winding shaft 12 so as to penetrate in the radial direction. A ventilation long groove 28 communicating with the ventilation passage 26 is formed in the outer peripheral portion of the winding shaft 12 in the axial direction. It is shaped to extend. Further, the cylinder unit 14 is provided with circumferential ventilation grooves 30, 32 in the inner peripheral surface thereof, and ventilation holes 34, 36 communicating with the ventilation annular grooves 30, 32 are provided for each of the air cylinders 20 a, 20 b. Each is drilled. Then, compressed air is supplied from the compressed air source to the air cylinders 20a and 20b through the air passage 18, the ventilation passage 26 and the ventilation long groove 28 of the winding shaft 12, and the ventilation annular grooves 30 and 32 and the ventilation holes 34 and 36 of the cylinder unit 14. By supplying the air, the air cylinders 20a and 20b are operated so that the pistons 24a and 24b advance in the direction of the chuck unit 16 from the cylinder holes 22a and 22b.

  The chuck unit 16 is rotatably held on the outer peripheral surface of the winding shaft 12 via a bearing 38. The chuck unit 16 is provided with a first friction ring 40 so as to face one annular side surface of the cylinder unit 14 on the side where the air cylinder 20a is provided. The first friction ring 40 is slidably held in a direction parallel to the axial direction of the winding shaft 12. The chuck unit 16 is provided with a coil spring 42, and the first friction ring 40 is urged toward the air cylinder 20 a of the cylinder unit 14 by the elastic force of the coil spring 42. Reference numeral 44 in the drawing denotes a ring-shaped stopper for restricting the first friction ring 40 from moving a predetermined distance or more in the direction of the air cylinder 20a due to the elastic force of the coil spring 42. Further, a second friction ring 46 is disposed on the chuck unit 16 so as to face the other annular side surface of the cylinder unit 14 on the side where the air cylinder 20b is provided.

  A plurality of, for example, six circular holes 48 are drilled around the circumference of the chuck unit 16, and the chuck members 50 are fitted into the respective circular holes 48. The bottom surface of the chuck member 50 is formed in a tapered shape, and the bottom surface of the hole is formed in the outer peripheral portion of the first friction ring 40 in a tapered shape corresponding to the tapered bottom surface of the chuck member 50, and the longitudinal cross-sectional shape is triangular. Six accommodating holes 52 are formed around the circumference. The chuck members 50 are accommodated in the respective accommodating holes 52 of the first friction ring 40, and the chuck members 50 move in the radial direction with the sliding operation of the first friction ring 40, and the outer periphery of the chuck unit 16 is moved. It is configured to protrude and retract from the circular hole 48 of the section. A narrow groove 54 is formed in the chuck member 50, and an outer circumferential groove 56 (see FIGS. 1 and 2) is formed in the center of the outer circumferential surface of the chuck unit 16 so as to be aligned with the narrow groove 54. ) Is formed. A stop ring 58 for preventing the chuck member 50 from coming out of the circular hole 48 due to the centrifugal force when the chuck unit 16 rotates is fitted in the narrow groove 54 and the outer peripheral groove 56. Further, a permanent magnet piece 60 for holding the chuck member 50 is buried on the tapered bottom surface of the receiving hole 52 of the first friction ring 40 so as to be able to slide on the tapered bottom surface. ing.

The operation of attaching and detaching the winding tube to and from the outer peripheral portion of the chuck unit 16 is performed as follows.
When high-pressure compressed air is supplied from the compressed air source to the air cylinder 20a through the air passage 18, the ventilation passage 26 and the ventilation long groove 28 of the winding shaft 12, and the ventilation annular groove 30 and the ventilation hole 34 of the cylinder unit 14, FIG. As shown on the left side of the upper half, the piston 24a of the air cylinder 20a advances toward the first friction ring 40 and pushes the first friction ring 40 of the chuck unit 16 against the elastic force of the coil spring 42. Push it all the way back (right in the drawing). With the sliding operation of the first friction ring 40, the chuck member 50 slides on the tapered bottom surface of the receiving hole 52 of the first friction ring 40, and the holding position on the tapered bottom surface of the receiving hole 52 is changed. It changes from above to below and moves in the radial direction (centripetal direction). As a result, the chuck member 50 is retracted into the circular hole 48 in the outer peripheral portion of the chuck unit 16. In this state, when the supply of the compressed air to the air cylinder 20a is stopped after the winding tube 62 is inserted and arranged on the outer peripheral side of the chuck unit 16, as shown in the right side of the upper half of FIG. As a result, the first friction ring 40 moves toward the air cylinder 20a and the piston 24a moves backward. As the first friction ring 40 moves in the direction of the air cylinder 20a, the chuck member 50 slides on the tapered bottom surface of the receiving hole 52 of the first friction ring 40 while holding the holding hole 52 on the tapered bottom surface. The position changes from below to above and moves in the radial direction (centrifugal direction). By this operation, the chuck member 50 is in a state where its upper portion (top) protrudes from the inside of the circular hole 48 on the outer peripheral portion of the chuck unit 16, and the upper portion of the chuck member 50 presses against the inner peripheral surface of the winding tube 62, and The winding tube 62 is integrally held by the chuck unit 16 via the individual chuck members 50. When the upper part of the chuck member 50 presses against the inner peripheral surface of the winding tube 62, the first friction ring 40 stops moving in the direction of the air cylinder 20a. When the winding tube 62 is separated from the chuck unit 16 after the sheet-shaped product is wound on the winding tube 62, high-pressure compressed air is supplied from the compressed air source to the air cylinder 20a, and the chuck member is operated by the above-described operation. 50 is drawn into the circular hole 48 in the outer peripheral portion of the chuck unit 16.

  When the sheet-like product is wound around the winding tube 62 mounted on the chuck unit 16, the winding tube 62 is held integrally with the chuck unit 16 by the chuck member 50 (the upper right part of the upper half of FIG. 3). From the compressed air source through the air passage 18, the ventilation passage 26 and the ventilation long groove 28 of the winding shaft 12, and the ventilation annular grooves 30, 32 and the ventilation holes 34, 36 of the cylinder unit 14 so that the compressed air source is maintained. Thus, compressed air of relatively low pressure is supplied to the air cylinders 20a and 20b. Then, the air cylinders 20a and 20b are operated to press the piston 24a against the first friction ring 40 of the chuck unit 16 and press the piston 24b against the second friction ring 46. In this state, the rotational power of the cylinder unit 14 that rotates integrally with the winding shaft 12 is supplied to the frictional force between the tip of the piston 24a of the cylinder unit 14 and the first friction ring 40 of the chuck unit 16 and the piston 24b. The force is transmitted to the chuck unit 16 by the frictional force between the tip end portion of the second friction ring 46 and the second friction ring 46 to generate a winding torque on the winding tube 62 held by the chuck unit 16.

  Although the configuration described above is not particularly different from the conventional winding device, the winding device according to the present invention includes a cylinder hole in a part or all of the plurality of air cylinders 20a and 20b of the cylinder unit 14. It is characterized in that a configuration is provided to prevent the pistons 24a, 24b from advancing from the 22a, 22b. This configuration and operation will be described below with reference to FIGS.

First, the embodiment shown in FIGS. 4 to 8 will be described.
At least a part of the plurality of air cylinders 20a and 20b provided in the cylinder unit 14, in the illustrated example, one of the outer peripheral surfaces of the pistons 24a of the three air cylinders 20a having the cylinder holes 22a opened on one annular side surface side. The first notch 64 is formed by notching the portion in the axial direction, and an angle of 180 ° around the circumference with respect to the formation position of the first notch 64 on the outer peripheral surface of the piston 24a. Are cut out in the axial direction to form a second cutout portion 66. The first cutout portion 64 is formed by being cut out shallowly in the axial direction from the distal end surface of the piston 24a, and the second cutout portion 66 is formed by being notched deeply rearward in the axial direction from the distal end surface of the piston 24a. Is formed. A locking piece 70 protrudes from the collar 68 of the chuck unit 16 so as to be adjacent to the opening on the annular side surface of the cylinder hole 22a of the air cylinder 20a.

  In this embodiment, the first notch 64 and the second notch 66 of the piston 24a are formed in a positional relationship of 180 ° around the circumference. What is necessary is just to form by changing the surrounding angle. The locking piece 70 does not have to be adjacent to the annular side opening of the cylinder hole 22a of the air cylinder 20a, but may be protruded in the vicinity thereof. The locking piece may be protruded from the inner peripheral surface of the cylinder hole 22a of the air cylinder 20a near the opening on the annular side surface.

  In the winding device having the above-described configuration, as shown in FIG. 6, the first cutout portion 64 of the piston 24a is angularly turned on the side opposite to the projecting position of the locking piece 70 (the upper side in the drawing). ) And the relatively low pressure compressed air is supplied to the air cylinder 20a in a state where the second notch 66 is angularly located on the same side as the projecting position of the locking piece 70, the piston The tip of 24 a presses against the first friction ring 40 of the chuck unit 16. At this time, the stepped bottom (engaging portion) at the notch end of the first notch 64 is angularly opposite to the locking piece 70, and the step at the notch end of the second notch 66 is provided. Since the attached bottom is located at a position separated from the locking piece 70, there is no hindrance to the advance operation of the piston 24 a from the cylinder hole 22 a, and the tip of the piston 24 a is attached to the first friction ring 40 of the chuck unit 16. Press firmly. Therefore, the air cylinder 20 a functions to transmit the rotational power of the cylinder unit 14 that rotates integrally with the winding shaft 12 to the chuck unit 16.

  On the other hand, the piston 24a is rotated by 180 ° about the axis in the piston hole 22a from the state shown in FIG. 6, and the second notch 66 of the piston 24a is angularly locked as shown in FIG. The first notch 64 is positioned on the opposite side (upper side in the drawing) of the projecting position of the piece 70, and is angularly located on the same side as the projecting position of the locking piece 70. Even if compressed air is supplied to the air cylinder 20a in this state, the stepped bottom portion (engaging portion) of the first cutout portion 64 engages with the locking piece 70 and the direction of the first friction ring 40. The movement of the piston 24a is restricted. For this reason, the tip of the piston 24 a does not press against the first friction ring 40. Therefore, the air cylinder 20a does not function to transmit the rotational power of the cylinder unit 14 to the chuck unit 16.

  Whether the apparatus is operated in the state shown in FIG. 6 or the apparatus is operated in the state shown in FIG. 7 is selected for each of the plurality of air cylinders 20a in which the notches 64 and 66 are formed in the piston 24a. The contact area between the pistons 24a of the plurality of air cylinders 20a and the first friction ring 40 can be adjusted. Then, by a relatively simple operation such as rotating the piston 24a of the air cylinder 20a in the cylinder hole 22a, the frictional force between the distal end of the piston 24a and the first friction ring 40 causes the cylinder unit 14 to rotate. By adjusting the rotational power transmitted to the chuck units 16, the winding torque of the sheet-like product on the winding tube 62 can be adjusted for each of the chuck units 16.

  4 and 7, the air cylinder 20a having the cylinder hole 22a opened on one annular side surface of the cylinder unit 14 has been described. However, the air cylinder 20b having the cylinder hole 22b opened on the other annular side surface of the cylinder unit 14 has been described. The same configuration can be applied to the cylinder 20b.

  FIG. 8 shows a modification of the piston. The piston 72 has a tip portion formed in a columnar shape slightly smaller in diameter than the piston diameter, and a stepped portion 74 is formed at a boundary between the large diameter portion and the small diameter portion, and a part of the outer peripheral surface of the large diameter portion. Is notched deeply in the axial direction to the rear to form a notched portion 76. In this piston 72, the stepped portion 74 becomes an engaging portion corresponding to the first cutout portion 64 of the piston 24a, and the stepped portion (engaging portion) 74 engages with the locking piece 70. Restrict the movement of the piston. The notch 76 corresponds to the above-described second notch 66, and the notch 76 allows the piston to move forward without engaging with the locking piece 70.

Next, another embodiment shown in FIGS. 9 and 10 will be described.
At least a part of a plurality of, for example, 8 × 2 air cylinders 20a and 20b provided in the cylinder unit 14, in the illustrated example, four air cylinders 20b having cylinder holes 22b opened on one annular side surface side in the illustrated example. With respect to the above, a means for restricting the advancing operation of the piston 24b from inside the cylinder hole 22b is added. That is, a screw hole 78 that penetrates from the outer peripheral surface of the cylinder unit 14 to the cylinder hole 22b of the air cylinder 20b is screwed in the radial direction of the cylinder unit 14, and the piston 24b is formed in a part of the peripheral surface of the piston 24b of the air cylinder 22b. A bottomed hole 80 was drilled at a position corresponding to the position where the screw hole 78 was formed, with the hole 22b retracted. Then, the set screw 82 is screwed into the screw hole 78, and the set screw 82 is screwed into a position where the tip of the screw reaches the bottomed hole 80, whereby the piston 24 b advances from the cylinder hole 22 b. Is regulated.

  In this embodiment, for each of the plurality of air cylinders 20b to which the movement restricting means of the piston 24b is added, it is selected whether or not the set screw 82 is to be screwed into the position where the tip reaches the bottomed hole 80. By doing so, the contact area between the pistons 24b of the plurality of air cylinders 20b and the second friction ring 46 can be adjusted. Then, by a simple operation of screwing the set screw 82 into the screw hole 78 and removing it, the frictional force between the tip end of the piston 24b and the second friction ring 46 causes the cylinder unit 14 to move to the chuck unit 16 by the frictional force. The transmitted rotational power can be adjusted, and the winding torque of the sheet-like product on the winding tube 62 can be adjusted for each chuck unit 16. In addition, a through hole is formed in the cylinder unit 14, and a locking groove is formed on the peripheral surface of the piston 24b. The locking pin is inserted into the through hole, and the tip of the locking pin is detachable from the locking groove. In such a configuration, the advancing operation of the piston 24b from within the cylinder hole 22b may be restricted.

  9 and 10, the air cylinder 20b having the cylinder hole 22b opened on the other annular side surface of the cylinder unit 14 has been described. However, the air cylinder 20b having the cylinder hole 22a opened on one annular side surface of the cylinder unit 14 has been described. The same configuration can be applied to the cylinder 20a.

  The winding device for a sheet-like product on a winding tube according to the present invention is used by being attached to a shredding slitter for cutting a sheet-like product such as a long strip film into a narrow width, and is used for packaging film, wrapping, and the like. It is used in many establishments that handle various sheet-like products such as films, films such as release films, tapes such as adhesive tapes, and papers such as wrapping paper.

10a, 10b Winding shaft portion 12 Winding shaft 14 Cylinder unit 16 Chuck unit 18 Air passage 20a, 20b Air cylinder 22a, 22b Cylinder hole 24a, 24b, 72 Piston 26 Vent passage 28 Vent long groove 30, 32 Vent annular groove 34, 36 Vent hole 38 Bearing 40 First friction ring 42 Coil spring 46 Second friction ring 50 Chuck member 52 Housing hole of first friction ring 58 Stop ring 60 Permanent magnet piece 62 Winding tube 64 First cutout 66 First 2 notch 70 locking piece 74 stepped part (engaging part)
76 Notch 78 Screw hole 80 Bottomed hole 82 Set screw

Claims (3)

A ring-shaped cylinder unit that is concentrically fixed to the hollow driven shaft that is driven to rotate and rotates integrally with the winding shaft, and is mounted concentrically and rotatably on the winding shaft and rotates around the circumference of the outer peripheral portion. A plurality of ring-shaped chuck units that integrally and detachably hold the winding tube from the inner peripheral surface side thereof by a plurality of chuck members arranged alternately in parallel along the axial direction of the winding shaft,
In the cylinder unit, a plurality of cylinder holes are formed around the circumference which are arranged in parallel with the axis of the winding shaft and are opened on the annular side surface facing the chuck unit. Air cylinders each having a piston whose distal end advances and retreats from an annular side opening by compressed air supplied to a cylinder hole through an air passage formed in a tube wall of a winding shaft and a cylinder unit and the cylinder unit. In the chuck unit, a friction ring to which the tip of the piston of the cylinder unit is pressed directly or indirectly is provided so as to rotate integrally with the chuck unit,
The rotational power of the cylinder unit, which rotates integrally with the winding shaft that is driven to rotate, is transmitted to the chuck unit by a frictional force between the tip end of the piston of the cylinder unit and the friction ring, and is transmitted to the chuck unit. By rotating the winding tube held via the chuck member, so as to wind the sheet-like product on the winding tube, in the winding device of the sheet-like product to the winding tube,
At least a part of the plurality of air cylinders is provided with movement restricting means for preventing the piston from advancing from the cylinder hole, and the movement restricting means is selectively operated. A contact area between the friction ring and the plurality of pistons can be adjusted by changing the number of pistons to be pressed against, thereby winding the sheet-like product around the winding tube. The movement restricting means,
In the chuck unit or the cylinder unit, adjacent to or near the annular side surface opening of the cylinder hole of the air cylinder, or in a part of the cylinder hole inner peripheral surface of the air cylinder, near the annular side surface opening A locking piece is protruded, and an engaging portion is provided near the tip of the piston such that the tip of the piston is engaged with the locking piece and the tip of the piston is not in contact with the friction ring. A part of the outer peripheral surface of the piston is notched in the axial direction at a different angle around the circumference with respect to the position of the engagement portion, and the step at the end of the notch is formed in a state where the piston tip is pressed against the friction ring. 2. A sheet-like shape on a wound tube according to claim 1, wherein a notched portion is formed so that a bottom portion with a groove allows the piston to advance from a cylinder hole without engaging with the locking piece. Product winding device The movement restricting means,
In the radial direction of the cylinder unit, while forming a through hole penetrating from the outer peripheral surface to the cylinder hole of the air cylinder, a part of the peripheral surface of the piston of the air cylinder, the piston has receded into the cylinder hole. In the state, a bottomed hole is formed at a position corresponding to the formation position of the through-hole, and a set screw or a lock screw is inserted into the through-hole, and a tip end is screwed or engaged with the bottomed hole. The apparatus for winding a sheet-like product onto a winding tube according to claim 1, wherein the locking pin is attached so that a tip end thereof can be removed from the bottomed hole.

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