JP4320394B2 - Winding tube chuck device - Google Patents

Description

  The present invention relates to a chuck device for a take-up tube for winding a sheet-like material such as a paper board or a synthetic resin film.

  2. Description of the Related Art Conventionally, a chuck device for a take-up tube includes a chuck main body that is inserted along the axial direction of the take-up tube, and an engagement member that is provided on the outer periphery of the chuck main body. Thus, the engaging member engages with the inner peripheral surface of the winding tube by the protrusion and disengages by retreating. As a mechanism for projecting and retracting the engaging member, there are known a mechanism configured to perform mechanically (see Patent Documents 1 and 2) and a mechanism configured to perform by fluid pressure such as compressed air.

  In the structure in which the engaging member is protruded and retracted by fluid pressure, there is one in which the engaging member is fitted to the chuck body as a tire-like elastic rubber ring. The elastic rubber ring is inflated with compressed air, the outer diameter thereof is enlarged, and the outer peripheral surface is engaged with the inner peripheral surface of the winding tube.

Moreover, what was comprised like FIG. 6 is also known. In FIG. 6, reference numeral 100 denotes a chuck body, and a plurality (3 to 6) of engaging members 101 are provided along the outer periphery of the end of the chuck body 100. The plurality of engaging members 101 are provided radially at equal intervals. A taper cone 102 is provided at the center of the engagement member 101, and the drive piston 104 provided outside the taper cone 102 and the chuck body 100 is connected by a drive shaft 105. When compressed air is pressed into one of the air chambers 103 (right side in the figure), the tapered cone 102 moves in the direction of the arrow 106, and the engaging member 101 protrudes to engage with the winding tube 107 shown in the chain line. When compressed air is press-fitted into the other side of the air chamber 103, the tapered cone 102 moves in the direction of the arrow 108, the engaging member 101 is retracted, and the engagement with the winding tube 107 is released.
Japanese Utility Model Publication No. 3-4178 JP-A-6-345295

  This invention makes it a subject to solve the various problems in the structure which protrudes and retracts the engaging member provided in the chuck | zipper main body by fluid pressures, such as compressed air among the above chuck devices.

  That is, in the structure shown in FIG. 6 in which the engaging member is protruded and retracted through the movement of the taper cone, the engaging member is pushed and retracted from one side. If the operation member becomes unreasonable, the engaging member may not move, or the center of the take-up tube and the mechanical center of the chuck body may be displaced, resulting in a misalignment between the take-up tube and the chuck body. There was a problem that there was also.

  In particular, in the chuck device shown in FIG. 6, a hardened metal claw is usually used as the engaging member 101, the claw width is narrow, and the surface pressure strength of the winding tube (paper tube or plastic tube) is low. Insufficient production of dust such as paper dust has resulted in inconveniences in the electronic material manufacturing process.

 In addition, in the configuration in which the tire-like rubber elastic ring is inflated via the fluid pressure and can be engaged with the take-up tube, dust such as paper dust as described above is generated to produce an electronic material. Although there is no problem of causing inconvenience in the process, when the weight of the sheet-like material wound around the winding tube is heavy, the rubber elastic ring is not able to withstand the weight, and the center of the winding tube and the chuck body are There is room for improvement in that there is a possibility that the mechanical center is displaced to cause a problem in the manufacturing process and that the sheet-like material may be adversely affected.

  The present invention provides a take-up tube chuck configured to project and retreat the engaging member through the fluid pressure described above, which does not cause inconvenience in the electronic material manufacturing process by generating dust such as paper dust. It was made for the purpose of further improving and improving the device, so that the alignment of the center of the take-up tube and the center of the chuck body can be ensured, and the protruding and retracting operations of the engaging member should be stable and reliable. An object of the present invention is to provide a chuck device for a wound take-up tube.

A chuck device for a take- up tube that winds up a sheet-like material according to the present invention that achieves the above-described object is provided with a chuck body that is inserted into an end portion of the take-up tube along the axial direction of the take-up tube, In the chucking device for a take-up tube, the engaging member is provided with an engaging member that protrudes and retracts in the radial direction of the chuck main body and engages and disengages from the inner peripheral surface of the take-up tube. ,
A pair of taper pistons are fitted on the outer periphery of the chuck body so as to be slidable in the axial direction of the chuck body, and each of the pair of taper pistons has an end portion closer to the other taper piston on the other side. The outer diameter is gradually reduced toward the taper piston, and the first taper surfaces are formed on the outer periphery of the end so as to face each other.
It said engaging member provided on the outer periphery of the chuck body, be those which are composed of a urethane rubber ring, which is formed annularly, and a plurality of tapered member on the inner peripheral digits set at equal intervals of the urethane rubber ring Then, the plurality of taper parts are arranged at predetermined positions and molded by overmolding urethane rubber, and the inside of the plurality of taper parts is not embedded in the urethane rubber ring, but inside the urethane rubber ring. with exposed state, and are not respective inner surfaces of said plurality of tapered parts are formed in a second tapered surface which is in contact opposite to the respective first tapered surface of the pair of tapered piston ,
The pair of outer diameter of the annular urethane rubber ring of the engaging member is enlarged by causing the tapered piston close to each other, the outer annular urethane rubber ring of the engaging member by spaced apart from each other a pair of tapered piston A chuck device for a take- up tube for winding a sheet-like material, wherein the diameter is reduced.

  The pair of taper pistons is provided with an air chamber for bringing the pair of taper pistons close to each other at an end opposite to the end formed with the first taper surface, and between the pair of taper pistons. Can be configured to be provided with a compression spring for separating the pair of taper pistons from each other.

  The compression spring for separating the pair of taper pistons can be provided in an air chamber provided between the pair of taper pistons in order to separate the pair of taper pistons from each other.

  The pair of taper pistons have first and second discs attached to ends opposite to the end where the first taper surface is formed. A drive shaft provided along the central axis is connected to a pair of drive pistons in an air chamber provided outside the chuck body, and the pair of taper pistons is driven by driving the pair of drive pistons away from each other. The pair of taper pistons may be separated from each other by driving the pair of drive pistons in directions close to each other and approaching each other.

  According to the winding tube chuck device of the present invention configured as described above, when the pair of taper pistons are brought close to each other, each first taper surface pushes the second taper surface formed on the taper component, The tapered part is pushed out in the radial direction of the chuck body, and the annular elastic member expands the outer diameter and protrudes in the radial direction. As a result, the outer peripheral surface of the annular elastic member can be chucked while being in close contact with the inner peripheral surface of the winding tube. The annular elastic member whose outer diameter is enlarged is supported in a state where the first and second tapered surfaces are in contact with each other by a taper component and a pair of taper pistons. For this reason, by maintaining the state in which the pair of taper pistons are close to each other, the center of the annular elastic member can be held in a state coincident with the center of the chuck body, and the sheet-like material wound around the winding tube Even when the weight is heavy, the outer diameter is not reduced. Therefore, it can be guaranteed that the center of the chuck device and the center of the winding tube always coincide.

  Further, since the taper component is supported from both sides by a pair of taper pistons and pushed outward through the first and second taper surfaces, excessive force is not applied to the taper component. You can As a result, the protruding and retracting operations of the engaging member are stable and operate reliably.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 3 show a chuck device 10 for a take-up tube according to a first embodiment. FIG. 1 is a sectional view, FIGS. 2A and 2B are external front views, FIG. 1A is a state before chucking the winding tube, and FIG. 2B is a state when the winding tube is chucked. is there. FIG. 3 is a conceptual view showing the relationship between the winding tube and the chuck device for the winding tube. FIG. 4 is a cross-sectional view of the engaging member 40 constituting the chuck device 10.

  The take-up tube chuck device 10 includes a chuck body 20 connected to the end of the drive shaft 11 and an engagement member 40 provided on the outer periphery of the chuck body 20.

  The chuck body 20 integrally includes a flange portion 21 and a shaft portion 22 that extends to one side of the flange portion 21 along the central axis of the flange portion 21. A pair of taper pistons 23 a and 23 b are fitted to the shaft portion 22, and each taper piston 23 a and 23 b can slide along the shaft portion 22. A cylinder part 24 is provided at the end of the shaft part 22 on the flange part 21 side, and the cylindrical part 24a is fitted to the outside of one taper piston 23a. A chamber 25 is formed. Also, a cylinder part 26 is provided at the opposite end of the shaft part 22, and the cylindrical part 26 a is fitted to the outside of the other taper piston 23 b so that the cylinder part 26 is also interposed between the taper piston 23 b and the cylinder part 26. An air chamber 27 is formed.

  The air chambers 25 and 27 are provided so as to penetrate the passage 28 formed in the flange portion 21 of the chuck body 20 and the air tank chamber 29 and the shaft portion 22 formed along the central axis of the shaft portion 22 in the radial direction. The passages 30 and 30 communicate with each other. The compressed air can be press-fitted through the passage 28, the air tank chamber 29, and the passage 30 from an air supply port 31 provided at the peripheral edge of the flange portion 21.

  Further, spring receiving holes 32 are formed on the surfaces of the taper pistons 23a and 23b facing each other, and are compressed between the taper pistons 23a and 23b so as to be supported by the spring receiving holes 32. A spring (coil spring) 33 is provided. The compression spring 33 urges the taper pistons 23a and 23b in a direction away from each other by its elastic force. A second air chamber 34 is formed by the gap between the pair of taper pistons 23 a and 23 b and the spring receiving hole 32, and the second air chamber 34 is axially connected through a passage 35 formed in the radial direction of the shaft portion 22. It communicates with a passage 36 formed from the portion 22 to the flange portion 21.

  Further, the taper pistons 23a and 23b are such that the end portions closer to the other taper pistons 23a and 23b are gradually reduced in outer diameter toward the other taper pistons 23a and 23b, respectively, and the first taper is formed on the outer periphery of the end portions. Surfaces 37a and 37b are formed.

  As shown in FIGS. 1 and 4, the engaging member 40 provided on the outer periphery of the chuck body 20 configured as described above includes a urethane rubber ring 41 formed in an annular shape, and a urethane rubber ring 41. It comprises a plurality of tapered parts 42, 42 provided at equal intervals on the inner periphery. A plurality of taper parts 42, 42 are arranged at predetermined positions, and urethane rubber ring 41 is formed by overmolding urethane rubber as an elastic member.

  The inside of the plurality of taper parts 42 is exposed without being buried in the urethane rubber ring 41, and can be in contact with the inner surfaces of the taper pistons 23a and 23b so as to face the first taper surfaces 37a and 37b. Second tapered surfaces 43a and 43b are formed. Further, at both ends of the urethane rubber ring 41 which are opened, cylindrical portions 44 and 45 are provided so as to fit outside the cylindrical portions 24a and 26a of the cylinder parts 24 and 26.

  The chuck main body 20 is configured such that the second taper surfaces 43a and 43b of the plurality of taper parts 42 and 42 constituting the engaging member 40 are in contact with the first taper surfaces 37a and 37b of the taper pistons 23a and 23b. The cylindrical members 44 and 45 provided at both ends of the urethane rubber ring 41 are fitted to the cylinder parts 24 and 26 by urethane pressers 38 and 39 attached to the cylinder parts 24 and 26, respectively. It is fixed. The inner peripheral surfaces of the cylindrical presser portions 38a and 39a provided on the urethane pressers 38 and 39 and the outer peripheral surfaces of the cylindrical portions 44 and 45 of the urethane rubber ring 41 are inclined as shown in the figure, and are cylindrical. The parts 44 and 45 are strongly pressed against the cylindrical parts 24a and 26a side of the cylinder parts 24 and 26. The rotational torque applied from the drive shaft 11 to the chuck body 20 can be reliably transmitted to the engaging member 40 without causing a loss. In order to further increase the certainty, knurls are formed on the outer peripheral surfaces of the cylindrical portions 24a and 26a of the cylinder parts 24 and 26 so that the cylindrical portions 44 and 45 of the urethane rubber ring 41 bite into the knurl surfaces. You can also.

  In FIG. 1, reference numeral 46 denotes a sealing member such as an O-ring provided to obtain airtightness.

  After the chuck device 10 of the winding tube of the embodiment configured as described above is inserted into the end of the winding tube 61 of the sheet-like object 60 as shown in FIG. 3, it is provided on the flange portion 21 of the chuck body 20. When the compressed air is pressed into the air chambers 25 and 27 from the air supply port 31, the winding tube 61 can be chucked. When compressed air is pressed into the air chambers 25 and 27, the taper pistons 23a and 23b slide along the shaft portion 22 so as to be close to each other. When the taper pistons 23a and 23b are close to each other, between the first taper surfaces 37a and 37b provided on the taper pistons 23a and 23b and the second taper surfaces 43a and 43b of the taper component 42 on the engagement member 40 side, A force that pushes the tapered part 42 outward in the radial direction of the shaft portion 22 is generated, and the outer diameter of the urethane rubber ring 41 is expanded through the tapered part 42 as shown in FIG. By expanding the outer shape of the urethane rubber ring 41, the outer peripheral surface of the urethane rubber ring 41 is brought into close contact with the inner peripheral surface of the winding tube 61, and the winding tube 61 can be chucked by the chuck device 10 of the winding tube.

  The state in which the outer diameter of the urethane rubber ring 41 is expanded can be maintained by maintaining the pressure of the compressed air that is press-fitted into the air chambers 25 and 27. Since the air tank chamber 29 is interposed between the passages 28 and 30, the influence of air leakage can be reduced, and the state where the tapered pistons 23a and 23b are brought close to each other can be reliably maintained. The weight of the sheet-like material 60 wound around the winding tube 61 is directly transmitted from the urethane rubber ring 41 to the shaft portion 22 via the taper part 42 and the taper pistons 23a and 23b. It is possible to prevent the outer diameter from being reduced, and to ensure that the center of the shaft portion 22, that is, the center of the chuck device 10 and the center of the winding tube 61 always coincide.

  When releasing the chuck of the winding tube 61, the compressed air that has been press-fitted from the air supply port 31 may be removed. When the compressed air is released, the taper pistons 23a and 23b move away from each other by the elastic force of the compression spring 33 and the contraction force of the urethane rubber ring 41, the outer diameter of the urethane rubber ring 41 is reduced, and the chuck is released. Is done. When releasing the chuck, the compressed air that is press-fitted from the air supply port 31 is removed, and the compressed air is pressed into the second air chamber 34 through the passages 35 and 36 so as to cooperate with the elastic force of the compression spring 33. You can also

  When the taper component 42 is moved in the radial direction of the shaft portion 22 by the proximity and separation along the shaft portion of the taper piston 23a, 23b, the inclination angle θ of the first taper surface 37a, 37b and the second taper surface 43a, 43b By making the angle larger than the coefficient of friction between the first and second tapered surfaces, the operation of the tapered component 42 can be made stable and reliable. Since the taper part 42 is simultaneously subjected to the action of the same strength from the taper pistons 23a, 23b on both sides thereof, an unreasonable force that tilts the taper part 42 does not work. The chuck and its releasing operation can be stably and reliably performed. In addition, since the first and second tapered surfaces 37a, 37b, 43a, 43b are arranged in a sealed space, there is no risk that the abrasion powder generated by friction will be scattered to the outside. Is suitable.

  Next, a second embodiment of the present invention shown in FIG. 5 will be described. In this embodiment, an air chamber for driving the taper pistons 23a and 23b is provided outside, and the other portions are configured in the same manner as in the previous embodiment. Therefore, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  First and second discs 51 and 52 are attached to end portions of the taper pistons 23a and 23b on the side opposite to the first taper surfaces 37a and 37b. An air chamber 53 is provided outside the flange portion 21 of the chuck body 20. In the air chamber 53, a pair of drive pistons 54a and 54b are provided. The first disk 51 and one drive piston 54 a are connected by a hollow drive shaft 55, and the second disk 52 and the other drive piston 54 b are inserted through the hollow drive shaft 55. They are connected by a drive shaft 56.

  In this embodiment, compressed air is press-fitted between a pair of drive pistons 54a and 54b provided in the air chamber 53, and air outside the pair of drive pistons 54a and 54b is discharged to separate the drive pistons 54a and 54b. Then, the taper pistons 23a and 23b are close to each other, and as in the first embodiment, the outer diameter of the urethane rubber ring 41 of the engaging member 40 can be enlarged to chuck the winding tube. Further, when compressed air is pressed into the outside of the pair of drive pistons 54a and 54b and the air between the pair of drive pistons 54a and 54b is discharged to bring the drive pistons 54a and 54b close to each other, the taper pistons 23a and 23b are mutually connected. The chuck of the take-up tube can be released.

  The air chamber for moving the taper pistons 23a and 23b can be made larger by using the external air chamber 53, and the chucking force of the engaging member 40 can be increased.

It is sectional drawing of 1st Embodiment of this invention. It is the external appearance front view of 1st Embodiment, (a) is a figure of the state before chucking a winding tube, (b) is a figure of the state when chucking a winding tube. It is a conceptual diagram which shows the relationship between a winding tube and the chuck | zipper apparatus of a winding tube. It is sectional drawing of the engaging member of embodiment. It is sectional drawing of 2nd Embodiment of this invention. It is sectional drawing of the chuck apparatus of the conventional winding tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chuck apparatus 11 of a take-up pipe Drive shaft 20 Chuck main body 21 Flange part 22 Shaft part 23a Taper piston 23b Taper piston 24 Cylinder part 24a Tubular part 25 Air chamber 26 Cylinder part 26a Tubular part 27 Air chamber 28 Passage 29 30 passage 31 air supply port 32 spring receiving hole 33 compression spring 34 second air chamber 35 passage 36 passage 37a first tapered surface 37b first tapered surface 38 urethane retainer 39 urethane retainer 40 engaging member 41 urethane rubber ring 42 Tapered component 43a Second tapered surface 43b Second tapered surface 44 Tubular portion 45 Tubular portion 46 Seal member 51 First disc 52 Second disc 53 Air chamber 54a Drive piston 54b Drive piston 55 Drive shaft 56 Drive shaft 60 Sheet-like material 61 Winding tube

Claims (4)

A chuck body inserted along the axial direction of the take-up pipe at the end of the take-up pipe, and an engagement member provided on the outer periphery of the chuck main body, projecting and retracting in the radial direction of the chuck body. In a chuck device for a take-up tube comprising an engaging member that engages and disengages from the inner peripheral surface of the take-up tube,
A pair of taper pistons are fitted on the outer periphery of the chuck body so as to be slidable in the axial direction of the chuck body, and each of the pair of taper pistons has an end portion closer to the other taper piston on the other side. The outer diameter is gradually reduced toward the taper piston, and the first taper surfaces are formed on the outer periphery of the end so as to face each other.
It said engaging member provided on the outer periphery of the chuck body, be those which are composed of a urethane rubber ring, which is formed annularly, and a plurality of tapered member on the inner peripheral digits set at equal intervals of the urethane rubber ring Then, the plurality of taper parts are arranged at predetermined positions and molded by overmolding urethane rubber, and the inside of the plurality of taper parts is not embedded in the urethane rubber ring, but inside the urethane rubber ring. with exposed state, and are not respective inner surfaces of said plurality of tapered parts are formed in a second tapered surface which is in contact opposite to the respective first tapered surface of the pair of tapered piston ,
The pair of outer diameter of the annular urethane rubber ring of the engaging member is enlarged by causing the tapered piston close to each other, the outer annular urethane rubber ring of the engaging member by spaced apart from each other a pair of tapered piston A chuck device for a take- up tube for winding a sheet-like material, wherein the diameter is reduced. The pair of taper pistons is provided with an air chamber for bringing the pair of taper pistons close to each other at an end opposite to the end formed with the first taper surface, and between the pair of taper pistons. 2. A chuck device for a take- up tube for winding up a sheet-like material according to claim 1, wherein a compression spring for separating the pair of taper pistons from each other is provided. The compression spring for separating the pair of taper pistons winds the sheet-like material according to claim 2 provided in an air chamber provided between the pair of taper pistons in order to separate the pair of taper pistons from each other. Take- up tube chuck device. The pair of taper pistons have first and second discs attached to ends opposite to the end where the first taper surface is formed, and the central axes of the first and second discs Are connected to a pair of drive pistons in an air chamber provided outside the chuck body, and the pair of taper pistons are brought close to each other by driving the pair of drive pistons away from each other. 2. The chuck device for a take- up tube for winding up a sheet-like material according to claim 1, wherein the pair of taper pistons are separated from each other by driving the pair of drive pistons in a direction approaching each other.

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