JP2004142182A - Roll device and twin-molding roll device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avert the generation of a prying phenomenon due to offset and thereby, ensure high-precision molding of a shape. <P>SOLUTION: A roll 11 is installed in the way that it is rotatable around its own pivotal axis and transferable axially and transferred in the axial direction by imparting an axial force to the position of a pivotal axis of the roll 11 by a displacement member 34 to be displaced in the same direction as the axial direction of the roll 11. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a roll device and a forming roll pair device, and more particularly to a roll device and a forming roll pair device for forming a plastic sheet for optical use.
[0002]
[Prior art]
Like the lenticular plate used in rear projector screens, the optical plastic sheet is formed with an uneven pattern on both the front and back sides. An extruded sheet is passed between opposing rolls using a forming roll pair device provided with two rolls facing each other in parallel, and embossing is performed (for example, Patent Document 1).
[0003]
In the case of forming a concavo-convex pattern on both the front and back surfaces of a sheet, it is necessary to perform phase matching of the concavo-convex pattern on the front and back surfaces. This phase adjustment (axial phase adjustment) is performed by moving the other roll in the axial direction with reference to one roll of the forming roll pair device.
[0004]
In a conventional forming roll pair device, a roll rotation driving unit is provided coaxially with a roll shaft as a basic mechanism for forming a transparent sheet, and a bearing box of a roll shaft is used as an axial phase adjustment (axial position adjustment) mechanism. Is provided so as to be movable in the roll axis direction, and a mechanism for displacing the base plate in the roll axis direction by a double-sided taper block or the like is provided (for example, Patent Document 2).
[0005]
Further, in the conventional forming roll pair device, one of two opposing rolls is used as an absolute reference roll, and a bearing box supporting the same is fixed to a frame. For opening and closing, it can also be moved in the direction (radial direction) in which it comes into contact with and separates from the opposing roll, and the other rolls are concentrated on the functions of axial phase adjustment and roll gap opening and closing. (For example, Patent Document 2).
[0006]
The two rolls facing each other have one fixed and the other opened and closed in parallel with the fixed roll to adjust the gap between the rolls and form a plastic sheet.
[0007]
[Patent Document 1]
JP-A-59-96920 [Patent Document 2]
JP-A-10-34748 [0008]
[Problems to be solved by the invention]
When adjusting the phase of the roll in the axial direction, the thrust (axial force) for the adjustment is a value based on 30 KN, depending on the sheet forming conditions. On the other hand, in the conventional axial phase adjustment mechanism, there is a deviation (offset) in the roll radial direction of the base plate with respect to the roll axis. For this reason, a bending moment is generated in the roll supporting portion by the thrust for performing the phase adjustment, and a twisting phenomenon occurs in each element of the axial phase adjustment mechanism. This twisting phenomenon causes the phase adjustment operation to stick out. Fine, high-accuracy positioning accuracy cannot be obtained, and reproducibility is poor.
[0009]
The required precision of the forming shape of optical plastic sheets such as lenticular plates is continually becoming more and more precise.以下 or less is required, and it is becoming difficult for conventional machines to satisfy the requirement.
[0010]
Also, in the conventional machine, the roll position and roll rotation are used as the reference rolls of the system with the fixed-side roll as the absolute reference.The reference roll has only a mechanism for driving the roll rotation, and the other roll is in the axial phase. Since both functions of adjustment and roll gap opening and closing are intensively loaded, the structure is complicated and the rigidity of the mechanism is restricted.
[0011]
As a result, an elastic deformation commensurate with the rigidity occurs with respect to the stress generated during the phase adjustment. This elastic deformation is a complicated behavioral displacement due to the complicated mechanism, and fluctuates depending on the operation state. Actually, since the elastic deformation due to insufficient rigidity and the twisting phenomenon caused by the offset occur in combination, it is difficult to specify the fluctuation factor, and it is difficult to perform a high-precision forming that satisfies user needs.
[0012]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a roll device capable of performing a high-precision forming by avoiding generation of a twisting phenomenon due to offset and elastic deformation due to insufficient rigidity. And a forming roll pair device.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a roll device according to the present invention includes a roll supported rotatably around its own central axis and movably in an axial direction, and a displacement displaced in the same direction as the axial direction of the roll. There is provided a member, wherein the displacement member applies axial force to a center axis position of the roll, and has axial position adjusting means for moving the roll in the axial direction, and rotation driving means for rotating and driving the roll.
[0014]
According to the roll device of the present invention, the displacement member of the axial position adjusting means is displaced in the same direction as the roll axis direction, and the displacement member applies an axial force to the center axis position of the roll. This allows the roll to move axially, without offset, and to adjust the axial phase of the roll without any bending moment due to the offset.
[0015]
The roll of the roll device according to the present invention is a roll for forming and shaping a pattern on the outer peripheral surface, and can adjust the axial phase of the roll in the forming and forming with high accuracy.
[0016]
As a detailed structure, the roll device according to the present invention has a detailed structure in which the axial position adjusting means is a screw rod member rotationally driven by a motor, and is screw-engaged with the screw rod to be stopped from rotating. And a nut member that is displaced in the same direction as the axial direction of the feed screw device, and the nut member constitutes the displacement member.
[0017]
ADVANTAGE OF THE INVENTION According to the roll apparatus by this invention, an axial force can be exactly given to the center axis of a roll by a feed screw device.
[0018]
Further, in the roll device according to the present invention, the displacement member is connected to the roll by a rotary sliding coupling for transmitting an axial force, so that the rotation of the roll is not transmitted to the axial position adjusting means including the feed screw device and the like. I have. This rotary sliding coupling can be configured by a combination of a radial rolling bearing and a thrust rolling bearing.Eliminating the existence of a sliding mechanism in each component and eliminating the stick problem by using a high-rigidity rolling mechanism for all components. To eliminate.
[0019]
Further, the roll device according to the present invention, as a detailed structure, a gear in which the rotation driving means is connected to a roll shaft on the roll side from the rotary slide coupling in a torque transmitting relationship by a slide key, a spline, or the like; And a motor that rotationally drives the gears. Thereby, the rotation drive means and the axial position adjustment means can be gathered on one shaft end side (drive side) of the roll, and operability and maintainability are improved.
[0020]
In order to achieve the above-mentioned object, a forming roll pair device according to the present invention includes two rolls provided to face each other in parallel, and forms a sheet through a sheet between the rolls. The roll is constituted by the roll of the roll device having the axial position adjusting means according to the above-described invention, and the other roll can be radially separated from and connected to the one roll.
[0021]
According to the forming roll pair apparatus of the present invention, the two rolls share the functions of adjusting the phase in the axial direction and opening and closing the gap between the rolls, thereby simplifying the mechanism and increasing the configuration.
[0022]
The roll of the forming roll pair device according to the present invention is a roll for forming and shaping a pattern on the outer peripheral surface, and can perform forming and shaping of an optical plastic sheet or the like with high accuracy.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 show one embodiment of a roll device and a forming roll pair device according to the present invention.
[0024]
Roll bearing boxes 12, 13 are fixedly mounted on the operation side 10A and the drive side 10B of the frame 10, respectively. The roll bearing boxes 12 and 13 are configured such that roll shafts 14 and 15 integrally formed at both ends of the roll 11 can be rotated around their own central axes by cylindrical rolling bearings (radial bearings) 16 and 17 and in the axial direction (in the figure). (To the left and right).
[0025]
Roll bearing boxes 46 and 47 are provided on the operation side 10A and the drive side 10B of the frame 10 by linear guides 44 and 45, respectively, so as to be movable in a direction in which the roll bearing boxes 46 and 47 are separated from and contacted with the roll 11 in the radial direction. The roll bearing boxes 46 and 47 respectively include roll shafts 49 and 50 integrally formed at both ends of another roll 48 with cylindrical rolling radial bearings 51 and 52 and a cylindrical rolling thrust bearing 54 (the thrust bearing is a roll bearing box 47 on one side). ) So as to be rotatable about its own central axis and to be immovable in the axial direction (left and right in the figure).
[0026]
The rolls 11 and 48 face each other in parallel, and a plurality of circumferential groove-shaped patterns 11A and 48A are engraved on the outer peripheral surface of each of the rolls 11 and 48 as shaping rolls.
[0027]
The shaft end of the roll shaft 15 on the drive side of the roll 11 is coaxially connected to the roll drive shaft 19 on the same axis by a coupling (flange joint) 18. The roll drive shaft 19 extends through a gear box 20 fixedly disposed on the drive side 10B of the frame 10 and a hollow gear shaft 22 rotatably provided by a radial bearing 21 in the gear box 20 in the roll axis direction. I have.
[0028]
The roll drive shaft 19 is connected to the hollow gear shaft 22 by a slip key, a spline 23 and the like so as to be displaceable in the roll axis direction in a torque transmitting relationship. The hollow gear shaft 22 supports a drive gear 24. A roll rotation drive motor 25 is attached to the gear box 20, and a gear 27 attached to a motor shaft 26 of the roll rotation drive motor 25 meshes with the drive gear 24.
[0029]
The rotation force of the roll rotation drive motor 25 is transmitted to the roll shaft 15 by the motor shaft 26, gear 27, drive gear 24, hollow gear shaft 22, sliding key or spline 23, roll drive shaft 19, and coupling 18. The force transmission causes the roll 11 to rotate around its own central axis.
[0030]
The shaft end of the roll drive shaft 19 is connected to the displacement member 34 of the axial position adjusting means 33 by a rotary sliding coupling 28. The rotary sliding coupling 28 includes a rotary case 29 to which the shaft end of the roll drive shaft 19 is fixedly connected, and a coupling shaft 32 arranged on the same axis as the roll drive shaft 19. The coupling shaft 32 cannot be displaced in the axial direction (roll axis direction) with respect to the rotating case 29 by a radial rolling bearing 30 and a thrust rolling bearing 31 disposed in the rotating case 29, and is rotatably supported relative to the rotating case 29. Have been.
[0031]
The rotation sliding coupling 28 blocks the rotation of the roll drive shaft 19 from being transmitted to the displacement member 34 by the combination of the above-described radial rolling bearing 30 and thrust rolling bearing 31, and transfers the axial force from the displacement member 34 to the roll. The power is transmitted to the center axis position of the drive shaft 19. The thrust rolling bearing 31 is preloaded and connects the rotating case 29 and the coupling shaft 32 without any play in the roll axis direction (axial direction).
[0032]
The displacement member 34 of the axial position adjusting means 33 includes a slide base 35 and a ball nut member 36 fixed to the slide base 35 by rotation. The linear guide 37 provided on the drive side 10 </ b> B of the frame 10 causes the roll shaft to move. It can be displaced in the same direction as the direction. The ball nut member 36 is disposed on the same axis as the center axis of the roll 11, and a ball screw bar 38 is screwed to the ball nut member 36.
[0033]
The ball screw rod 38 is rotatably supported by a radial rolling bearing 40 and a thrust rolling bearing 41 provided in a bearing box 39, and is drivingly connected to a phase adjusting speed reducer motor 43 by a shaft coupling 42.
[0034]
When the ball screw rod 38 is rotationally driven by the phase adjustment speed reducer motor 43, the displacement member 34 including the ball nut member 36 is displaced in the same direction as the roll axis direction. This displacement is transmitted to the roll drive shaft 19 and the roll shaft 15 by the rotary sliding coupling 28, and the roll 11 moves in the axial direction. The roll axis phase adjustment is performed by this axial movement.
[0035]
Here, the arrangement position of each element can be summarized as follows: the roll shafts 14 and 15, the coupling 18, the roll drive shaft 19, the rotating case 29 of the rotary sliding coupling 28, the coupling shaft 32, the ball nut member 33, and the ball screw rod. All 38 are on the same axis as the central axis of the roll 11.
[0036]
Therefore, the axial force is applied to the center axis position of the roll 11 by the displacement member 34, and the roll 11 moves in the axial direction without offset, and the adjustment of the axial phase of the roll 11 causes the bending moment due to the offset to be reduced. It is performed with high accuracy without accompanying.
[0037]
The bearing boxes 46 and 47 of the roll 48 are moved in parallel in the direction of the gap between the rolls (roll radial direction) by feed screws 58 and 59 driven by motors 56 and 57 for adjusting the gap between the rolls. Adjust the gap.
[0038]
The shaft end of the roll shaft 50 on the drive side of the roll 48 is drivingly connected to a motor shaft 62 of a roll rotation drive motor 61 by a constant velocity universal joint 60 such as a Schmitt coupling. The rotation force of the roll rotation drive motor 61 is transmitted to the roll shaft 50 by the motor shaft 62 and the constant velocity universal joint 60, and the rotation force causes the roll 48 to rotate around its own central axis.
[0039]
As a result, the rolls 11 and 48 share the functions of adjusting the phase in the axial direction and opening and closing the gap between the rolls, thereby simplifying the mechanism and increasing the configuration, and eliminating uncertain behavior. Due to these facts, it is possible to perform a high-precision forming.
[0040]
【The invention's effect】
As understood from the above description, according to the roll device and the forming roll pair device of the present invention, by eliminating the offset of the axial phase adjustment mechanism, the occurrence of the twisting phenomenon caused by the offset can be avoided. Since the two rolls share the functions of adjusting the phase in the axial direction and opening and closing the gap between the rolls, it is possible to avoid elastic deformation due to insufficient rigidity and to perform high-precision forming.
[Brief description of the drawings]
FIG. 1 is a plan view showing one embodiment of a roll device and a forming roll pair device according to the present invention.
FIG. 2 is a front view of a roll on an axial phase adjustment side of one embodiment of a roll device and a forming roll pair device according to the present invention.
FIG. 3 is a skeleton diagram of a roll drive system and a phase adjustment system on an axial phase adjustment side of one embodiment of a roll device and a forming roll pair device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Frame 11 Roll 14, 15 Roll shaft 19 Roll drive shaft 20 Rotation sliding coupling 25 Roll rotation drive motor 29 Rotation case 30 Radial rolling bearing 31 Thrust rolling bearing 32 Coupling shaft 33 Ball nut member 38 Ball screw rod 48 Roll 49, 50 Roll shaft 56, 57 Roll gap adjusting motor 61 Roll rotation drive motor

Claims (8)

A roll supported rotatably and axially movably about its own central axis,
An axial position adjusting means comprising a displacement member that displaces in the same direction as the axial direction of the roll, wherein the displacement member applies an axial force to a center axis position of the roll, and moves the roll in the axial direction.
Rotation driving means for driving the roll to rotate,
Roll device having a. The axial position adjusting means includes a screw rod that is rotationally driven by a motor, a nut member that is screw-engaged with the screw rod, is stopped from rotating, and is displaced in the same direction as the axial direction of the roll by rotation of the screw rod. The roll device according to claim 1, further comprising a feed screw device according to Claim 1, wherein the nut member forms the displacement member. 3. The roll device according to claim 1, wherein the displacement member is connected to the roll by an axial force transmitting rotary sliding coupling. The rolling device according to claim 3, wherein the rotary sliding coupling is configured by a combination of a radial rolling bearing and a thrust rolling bearing. The rotation drive means includes a gear connected to a roll shaft on the roll side of the rotary slide coupling by a slip key, a spline, or the like in a torque transmitting relationship, and a motor that drives the gear to rotate. The roll device according to 3 or 4. The roll device according to any one of claims 1 to 5, wherein the roll is a roll for forming and shaping a pattern on an outer peripheral surface. In a forming roll pair device including two rolls provided to face each other in parallel and forming a sheet between the rolls,
A forming roll pair device, wherein one roll is constituted by a roll of the roll device according to any one of claims 1 to 6, and the other roll can be separated from and connected to the one roll in the radial direction. The forming roll pair device according to claim 7, wherein each of the rolls is a roll for forming and shaping a pattern on an outer peripheral surface.

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