JP3929932B2 - Sheet / film forming roll equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet / film forming roll apparatus, and more particularly to a sheet / film forming roll apparatus such as a cooling roll apparatus for forming a sheet / film by extrusion molding.
[0002]
[Prior art]
In sheet / film molding by extrusion molding, at the start of production, the gaps between multiple cooling rolls (gap between rolls) are widened to allow resin to pass between the cooling rolls, and then the cooling rolls are moved in the roll radial direction to form the roll gaps. The sheet is narrowed to a predetermined gap and a sheet / film is formed.
[0003]
Movement of the cooling roll in the roll radial direction (opening / closing of the roll) is performed by moving a bearing case supporting both ends of the cooling roll in the roll radial direction by a hydraulic (or pneumatic) cylinder device, an electric feed screw or the like.
[0004]
Conventionally, an electric motor for rotating the cooling roller, reduction gear is fixed to the frame of the molding machine, at the time of roll-off, only the cooling roll and the bearing casing are moved in the roll diameter direction. For this reason, the central axis of the cooling roll and the central axis of the output shaft of the speed reducer are biased with the opening and closing of the roll. The cooling roll and the speed reducer are connected by a universal joint that allows this deviation (for example, Non-Patent Document 1).
[0005]
In the case of sheets and films for optical applications, it is necessary to minimize the rotational fluctuation of the cooling roll as much as possible in order to smooth the product surface. For this reason, the reduction gear and the cooling roll use high-precision constant-velocity universal joints such as Schmitt couplings (trade names). The reason for using the Schmitt coupling is not only to open and close the cooling roll, but also because the reduction gear is larger than the roll diameter, it is necessary to install the reduction gear wider than the roll interval.
[0006]
The speed reducer and the electric motor are drivingly connected by a transmission mechanism using a belt and a pulley. A worm reducer is used as the reducer.
[0007]
[Non-Patent Document 1]
TOSHIBA MACHINE CO., LTD. Homepage “longitudinal drawing machine” [searched on May 22, 2003] Internet <URL: http: //www.toshiba-machine.co.jp/kouji/prod/se/lsm.htm>
[0008]
[Problems to be solved by the invention]
The prior art has the following problems.
(1) The center axis of the cooling roll and the center axis of the output shaft of the speed reducer are displaced with the opening and closing of the roll, and a universal joint such as a Schmitt coupling that allows this deviation is required.
[0009]
On the other hand, there is a type in which the electric motor and speed reducer are directly connected to the bearing case, but when replacing the roll, the roll replacing work is complicated, for example, the electric motor and speed reducer must be removed from the bearing case. Become a thing. In addition, the operating vibration of the electric motor and reduction gear is directly transmitted to the bearing case, and the product is affected by the vibration.
[00010]
(2) Rotational fluctuation occurs at the Schmitt coupling part, and horizontal streaks enter the sheet / film. There are also restrictions on the amount of roll opening and closing movement.
[0011]
(3) When the number of rolls increases, the amount of movement needs to be large, so the number of rolls is limited to about four, and it is difficult to increase the number of rolls further.
[0012]
(4) Rotational fluctuation occurs in the worm speed reducer, and horizontal streaks enter the sheet / film.
[0013]
(5) Rotational fluctuations occur at the belt and pulley portions, and horizontal streaks enter the sheet / film.
[0014]
(6) The surface of the sheet / film is damaged due to dust generation from the belt.
[0015]
The present invention has been made to solve the above-described problems, and does not require a universal joint such as a Schmitt coupling, has a simple structure, has little fluctuation in roll rotation, and has a highly accurate surface property (smoothness). It is an object of the present invention to provide a sheet / film forming roll apparatus that facilitates maintenance work such as roll replacement.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, a roll apparatus for forming a sheet and film according to the present invention has a roll supported at both ends by a bearing case and movable in the roll radial direction together with the bearing case, and one end side of the roll. the sheet or film forming roll apparatus having a driving device for rotating the roll, said drive device, the the bearing case connected to one end of the roll by a separate place has been coupled, the roll of the bearing case In addition to the bearing case linear guide portion that guides the radial movement, a drive device guide portion that guides the roll radial movement of the drive device is provided, and the drive device is guided by the drive device guide portion. It can move in the roll radial direction together with the bearing case.
[0017]
According to the roll device for sheet / film forming according to the present invention, the drive device also moves in the roll radial direction together with the bearing case, so that the roll center axis and the output shaft center axis of the drive device may be biased as the roll opens and closes. There is no need for a universal joint.
[0018]
Sheet or film forming roll apparatus according to the present invention, the coupling may be constituted by a flexible coupling for coaxial connection.
[0019]
The roll apparatus for sheet / film forming according to the present invention has a clamp means for clamping the drive device to a fixed frame at an arbitrary position in the radial direction of the roll .
[0020]
In the sheet / film forming roll device according to the present invention, the drive device is detachably connected to the bearing case.
[0021]
In the sheet / film forming roll apparatus according to the present invention, the driving device includes an electric motor arranged vertically perpendicular to a horizontal rotation axis of the roll, and a reduction gear using a helical bevel gear.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an outline of one embodiment of a sheet / film forming roll apparatus according to the present invention.
[0023]
The sheet / film forming roll apparatus has a fixedly arranged cooling roll 11 and a cooling roll 21 that can be opened and closed, that is, movable in the roll radial direction, on the frame 40.
[0024]
The fixedly arranged cooling roll 11 is rotatably supported at both ends by bearing cases 12 and 13 fixed on the frame 40, and is rotatable about its own central axis (around the horizontal axis).
[0025]
One end of the cooling roll 11 is drivably coupled to the output shaft 16 of the driving device 15 on the same axis line by a direct coupling type flexible coupling 14 for coaxial connection. The drive device 15 includes an electric motor 17 and a speed reduction device 18 and is fixed on the frame 40.
[0026]
The cooling roll 21 which can be opened and closed is rotatably supported at both ends by bearing cases 24 and 25 which are guided by linear guide rails 22 and 23 which are linear guide portions provided on the frame 40 and can move in the roll radial direction. , It is rotatable around its own central axis (around the horizontal axis).
[0027]
The linear guide portion that guides the movement of the bearing cases 24 and 25 in the roll radial direction is not limited to the circulation ball type linear guide rail, and various straight lines such as a needle bearing type, a hydrostatic bearing type, and a sliding type. It can be configured by a guide member.
[0028]
One end of the cooling roll 21 is drivingly connected to the output shaft 28 of the driving device 27 on substantially the same axis by a direct coupling type flexible coupling 26 for coaxial connection. The drive device 27 includes an electric motor 29 and a speed reduction device 30 and is guided by a linear guide rail 31 provided on the frame 40 so as to be movable in the roll radial direction.
[0029]
The guide portion that guides the movement of the driving device 27 in the roll radial direction is not limited to the circulating ball type linear guide rail, and is constituted by various linear guide members such as a needle bearing type, a hydrostatic bearing type, and a sliding type. Is possible. The guide portion that guides the movement of the driving device 27 in the roll radial direction may be rougher than the linear guide portion that guides the movement of the bearing cases 24 and 25 in the roll radial direction with respect to the linear guide. Any device that allows radial movement is acceptable.
[0030]
The driving device 27 is connected to the bearing case 25 by a base member 32. Hydraulic cylinder devices 36 and 37 for moving the bearing cases 24 and 25 in the roll radial direction are connected to the bearing cases 24 and 25, respectively.
[0031]
As the driving devices 15 and 27 including the reduction gears 18 and 30, a device having a width in the roll radial direction smaller than the roll diameter is selected.
[0032]
Next, the detailed structure of the sheet / film forming roll apparatus of one embodiment will be described with reference to FIGS.
[0033]
In the driving device 15 of the cooling roll 11 in a fixed arrangement, a reduction gear (gear box) 18 is fixed on the frame 40 by a base member 151. The electric motor 17 is mounted on the speed reducer 18 in a vertical arrangement perpendicular to the horizontal rotation axis of the cooling roll 11.
[0034]
The reduction gear 18 has helical spur gears 181 and 182 meshed with each other and helical bevel gears 183 and 184 meshed with each other. The helical spur gear 181 is connected to the output shaft 171 of the electric motor 17. The rotation of the electric motor 17 is reduced and transmitted to the output shaft 171 → the helical spur gear 181 → the helical spur gear 182 → the helical bevel gear 183 coaxial with the helical spur gear 182 → the helical bevel gear 184 → the output shaft 16 of the reduction gear 18.
[0035]
In the flexible coupling 14, the hub member 141 key-connected to the output shaft 16 of the reduction gear 18, the intermediate spacer 142, and the hub member 143 key-connected to the shaft end 111 of the cooling roll 11 are substantially the same. The hub member 141 is connected to one end of the intermediate spacer 142 by the laminated flexible element 144 and the other end of the intermediate spacer 142 is connected to the hub member 143 by the laminated flexible element 145. Has been.
[0036]
The laminated flexible elements 144 and 145 are obtained by laminating thin plates such as stainless steel, and are bolted to the hub member 141 or 143 and the intermediate spacer 142 at different positions.
[0037]
The flexible coupling 14 having the above-described structure transmits torque on the same axis via the laminated flexible elements 144 and 145, and the allowable misalignment is 10 mm or less, and is actually very small, about 1 to 2 mm. Used in an allowable misalignment state.
[0038]
The speed reducer (gear box) 30 of the driving device 27 of the cooling roll 21 that can be opened and closed is fixed on a plate-like base member 32, and the base member 32 is attached to the linear guide rail 31 by a linear guide member 321 mounted on the lower bottom surface. It is slidably engaged. The electric motor 29 is mounted on the speed reducer 30 in a vertical arrangement perpendicular to the horizontal rotation axis of the cooling roll 21.
[0039]
The reduction gear 30 is the same as the reduction gear 18, and includes helical spur gears 301 and 302 meshing with each other and helical bevel gears 303 and 304 meshing with each other. The helical spur gear 301 is an output shaft 291 of the electric motor 29. It is connected to. The rotation of the electric motor 29 is decelerated and transmitted to the output shaft 291 → the helical spur gear 301 → the helical spur gear 302 → the helical bevel gear 303 coaxial with the helical spur gear 302 → the helical bevel gear 304 → the output shaft 28 of the reduction gear 30.
[0040]
The flexible coupling 26 is the same as the flexible coupling 14, and is key-connected to the hub member 261 that is key-connected to the output shaft 28 of the speed reducer 30, the intermediate spacer 262, and the shaft end 211 of the cooling roll 21. The hub member 261 and the other end of the intermediate spacer 262 are connected to each other by the laminated flexible element 264. The hub member 263 is connected to the laminated flexible element 265.
[0041]
The laminated flexible elements 264 and 265 are also laminated with thin plates such as stainless steel, and are bolted to the hub member 261 or 263 and the intermediate spacer 262 at different positions.
[0042]
The flexible coupling 26 having the above-described structure also transmits torque on the same axis via the laminated flexible elements 264 and 265, and the allowable misalignment is 10 mm or less, and is actually very small, about 1 to 2 mm. Used in an allowable misalignment state.
[0043]
The bearing case 25 is attached on the base member 251. The base member 251 is slidably engaged with the linear guide rail 23 by a linear guide member 252 mounted on the lower bottom surface. Although this linear guide engagement is not shown, the bearing case 24 has the same structure.
[0044]
The base member 32 of the drive device 27 has an extension 322 extended to the bearing case 25 side. The extension 322 is detachably connected to the base member 251 of the bearing case 25 by an engaging pin 323 that can be engaged and disengaged at the tip.
[0045]
A clamping means 33 is provided at a position directly below the base member 32 of the driving device 27. The clamp means 33 includes a flanged clamp member 332 that is driven by a fluid pressure cylinder device 331 attached to the lower bottom surface of the frame 40, and a lock member that is fixedly attached to the lower bottom surface of the base member 32 and engages with the clamp member 332. 333. A through hole 334 through which the clamp member 332 penetrates the lock member 333 is a long hole that is long in the roll radial direction (guide rail direction).
[0046]
Accordingly, the lock member 333 is pulled downward by the downward movement of the flanged clamp member 332 by the fluid pressure cylinder device 331, and the drive device 27 is clamped and fixed to the frame 40 on the fixed side at an arbitrary roll radial direction position.
[0047]
In the sheet / film forming roll device having the above-described structure, the roll opening / closing is performed by moving the bearing cases 24 and 25 in the roll radial direction by the hydraulic cylinder devices 36 and 37 with the clamping means 33 loosened (unclamped). I do. The movement of the bearing cases 24 and 25 in the roll radial direction is performed in a parallel movement state guided by the linear guide rails 22 and 23.
[0048]
When the roll is opened and closed, the drive device 27 is guided by the linear guide rail 31 and moves in the roll radial direction as the bearing cases 24 and 25 move in the roll radial direction. Thereby, the roll center axis and the output shaft center axis of the drive device 27 do not deviate with the opening and closing of the roll, and the coupling between the cooling roll 21 and the output shaft 28 of the drive device 27 is a direct coupling type flexible coupling. 26 and does not require complex universal joints such as Schmidt couplings.
[0049]
The sheet / film forming roll device having the above-described configuration has the following effects.
(1) Since the electric motor 29 and the speed reducer 30 are directly connected, rotation fluctuation does not occur.
(2) Since there is no Schmidt coupling, there is no rotational fluctuation at that portion.
(3) Since the helical bevel gears 303 and 304 are used for the speed reducer 30, the rotational fluctuation in this portion is smaller than that of the worm type.
(4) Since the flexible coupling 26 is used, even if the moving positions of the left and right bearing cases 24 and 25 of the cooling roll 21 are slightly different and not parallel, the speed reducer 30 and the bearing are not broken. Absorption of misalignment is as small as about several millimeters, but the adjustment is made so that the cores of the cooling roll 21 and the speed reducer 30 are aligned except when the roll is moving.
(5) Since there is the clamping means 33, the vibration of the speed reducer 30 does not affect the forming of the sheet / film.
(6) Since the gap when the cooling roll 21 is opened can be widened, the operation of passing the sheet becomes easier and the safety is increased.
(7) The number of rolls can be increased to 5 or more.
(8) If only the flexible coupling 26 is removed at the time of roll replacement, there is no need to remove the reduction gear 30.
(9) Further, by removing the engagement pin 323, the connection between the bearing case 25 and the speed reducer 30 is disconnected, and the bearing case 25 and the speed reducer 30 are placed on the linear guide rails 23 and 31, respectively in the rail direction. Therefore, a maintenance space can be secured.
[0050]
Incidentally, in the embodiment described above, for simplicity of explanation, Ru have a roll number as two, roll number is, three, four, it is needless to say can be set to more plural.
[0051]
【The invention's effect】
As understood from the above description, the sheet / film forming roll apparatus according to the present invention does not require a universal joint such as a Schmitt coupling, has a simple structure, has little roll rotation fluctuation, and has a highly accurate surface. A sheet or film having properties can be produced.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of one embodiment of a roll apparatus for forming a sheet and film according to the present invention.
FIG. 2 is a plan view of a main part showing details of a roll device for forming a sheet and film according to one embodiment.
FIG. 3 is an elevation view of a main part showing details of a roll device for forming a sheet and film according to one embodiment.
4 is a cross-sectional view taken along line IV-IV in FIG. 2;
5 is a cross-sectional view taken along line VV in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Cooling roll 12, 13 Bearing case 14 Flexible coupling 15 Driving device 16 Output shaft 17 Electric motor 18 Deceleration device 21 Cooling roll 22, 23 Linear guide rail 24, 25 Bearing case 26 Flexible coupling 27 Driving device 28 Output shaft 29 Electric Motor 30 Reduction gear 31 Linear guide rail

Claims (5)

In a roll apparatus for sheet / film forming having both ends supported by a bearing case, having a roll movable in the roll radial direction together with the bearing case, and having a driving device that rotationally drives the roll on one end side of the roll.
The drive device is connected to one end of the roll by coupling separately from the bearing case,
In addition to the bearing case linear guide portion that guides the movement of the bearing case in the roll radial direction, a drive device guide portion that guides the movement of the drive device in the roll radial direction is provided, and the drive device is the guide for the drive device. It is guided by the parts movable in the roll diameter direction together with the bearing case in which the sheet film forming roll unit.   The sheet / film forming roll apparatus according to claim 1, wherein the coupling is a flexible coupling for coaxial connection.   The roll apparatus for sheet | seat film forming of Claim 1 or 2 which has a clamp means which clamps and fixes the said drive device to the flame | frame of a fixed side in arbitrary roll radial direction movement positions. The roll device for sheet / film forming according to any one of claims 1 to 3, wherein the driving device is detachably connected to the bearing case.   5. The sheet / film forming roll apparatus according to claim 1, wherein the driving device includes a vertically arranged electric motor orthogonal to a horizontal rotation axis of the roll and a reduction gear using a helical bevel gear.

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