JP4267894B2 - Roll device and forming roll pair device - Google Patents

Description

[0001]
BACKGROUND 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 in an optical plastic sheet forming form.
[0002]
[Prior art]
As with lenticular plates used in rear projector screens, optical plastic sheet forming shapes with concave and convex patterns on both front and back surfaces are for forming shapes with engraved patterns on each outer peripheral surface. Are formed in an embossed manner by passing the extruded sheet between rolls facing each other, using a forming roll pair apparatus provided with the two rolls facing each other in parallel (for example, Patent Document 1).
[0003]
When forming an uneven pattern on both the front and back sides of a sheet, it is necessary to perform phase alignment of the uneven pattern on the front and back sides. This phase alignment (axial phase adjustment) is performed by moving the other roll in the axial direction on the basis of one roll of the forming roll pair device.
[0004]
The conventional forming roll pair device is provided with roll rotation driving means coaxially with the roll axis as a basic mechanism of transparent sheet forming, and a roll shaft bearing box 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]
Also, the conventional forming roll pair device has one of the two rolls facing each other as an absolute reference roll, the bearing box that supports the roll is fixed to the frame, and the bearing box of the other roll has a roll gap. For opening and closing, it is also possible to move in the direction (diameter direction) that is separated from and contacting the opposing roll, and the other roll is concentrated on the functions of axial phase adjustment and roll gap opening and closing. (For example, patent document 2).
[0006]
The two opposed rolls are fixed on one side, and the other is opened and closed in parallel to the fixed side roll to adjust the gap between the rolls, thereby forming a plastic sheet.
[0007]
[Patent Document 1]
JP 59-96920 A [Patent Document 2]
Japanese Patent Laid-Open No. 10-34748
[Problems to be solved by the invention]
When adjusting the phase of the roll in the axial direction, the thrust for adjustment (axial force) is a value based on 30 KN, although it depends on the sheet forming conditions. In contrast, the conventional axial phase adjustment mechanism has 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 support portion by the thrust force that performs the phase adjustment, and a twisting phenomenon occurs in each element of the axial direction phase adjustment mechanism. Due to this twisting phenomenon, the phase adjustment operation becomes stick-slip. There are problems such as fineness and inability to obtain highly accurate positioning accuracy and poor reproducibility.
[0009]
The required accuracy of the forming form of optical plastic sheets such as lenticular plates is continually being refined, and the allowable value of phase error of patterns (concave / convex patterns) on both front and back surfaces of optical plastic sheets is 1/4 or less is required, and it is difficult for conventional machines to satisfy the requirement.
[0010]
In the conventional machine, the roll on the fixed side is used as the absolute reference, and both the roll position and roll rotation are used as the system reference roll. Only the mechanism for driving the roll rotation is attached to the reference roll, and the other roll is in the axial phase. Since the functions of both adjustment and roll gap opening / closing are concentrated, the structure is complicated and the rigidity of the mechanism is restricted.
[0011]
As a result, elastic deformation corresponding to the rigidity occurs with respect to the stress generated during the phase adjustment. Since this mechanism is complicated, this elastic deformation has a complicated behavior displacement and varies depending on the operating state. Actually, the elastic deformation due to insufficient rigidity and the twisting phenomenon caused by the offset occur in combination. Therefore, it is difficult to specify the variation factor, and it is difficult to perform a highly accurate forming shape that satisfies the user needs.
[0012]
The present invention has been made in order to solve the above-described problems, and is capable of avoiding the occurrence of a twisting phenomenon caused by offset and elastic deformation due to insufficient rigidity, and performing a highly accurate forming shape. And it aims at providing a forming roll pair device.
[0013]
[Means for Solving the Problems]
To achieve the foregoing objects, the roll apparatus according to the invention, is movably supported rotatably and axially around more its center axis integrally molded bearing means fixedly arranged roll shaft are each at both ends And a roll engraved with a pattern on the outer peripheral surface ,
A rotation driving means for rotating the rolls,
An axial position adjusting means for moving the roll in the axial direction;
The axial position adjusting means comprises a threaded rod which is rotated by the motor, the roll central axis displaced in the axial direction in the same direction of the roll by the rotation of the threaded rod is the threaded rod and the threaded engagement detent same axis and a displacement member provided with the arranged nut member on the line, rotary slide coupling the displacement member consists of a combination of axial force radical rolling bearing and the thrust rolling bearing of the transmission to the central axis position of the roll and Is connected to a roll shaft integrally formed at one end of the roll via a roll drive shaft, and moves the roll in the axial direction by applying an axial force to the roll .
The rotation drive means is attached to a drive gear connected to the roll drive shaft in a torque transmission relationship by a slip key, a spline, etc., and a motor shaft of a motor that meshes with the drive gear and rotationally drives the drive gear. It is characterized by comprising a gear.
[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 axial direction, and the displacement member applies an axial force to the central axis position of the roll.
Accordingly, the roll moves in the axial direction without an offset, and adjustment of the axial phase of the roll is performed without a bending moment due to the offset. It is a roll for a shaping form whose pattern is engraved on the outer peripheral surface, and the axial phase of the roll can be adjusted with high accuracy in the shaping form. The axial position adjusting means is a screw rod member that is rotationally driven by a motor, and a nut member that is engaged with the screw rod and is rotationally stopped and displaced in the same direction as the axial direction of the roll by the rotation of the screw rod. And the nut member constitutes the displacement member. An axial force can be accurately applied to the center axis of the roll by the feed screw device. The displacement member is connected to the roll by an axial force transmission rotary sliding coupling so that the rotation of the roll is not transmitted to the axial position adjusting means including the feed screw device. This rotary sliding coupling can be composed of a combination of radial roller bearings and thrust roller bearings, eliminating the presence of sliding mechanisms in each part of the configuration, and making all of them highly rigid rolling mechanisms, thereby preventing stick slip problems. Eliminate. The rotation driving means includes a gear connected to the roll shaft on the roll side from the rotary sliding coupling in a torque transmission relationship by a sliding key, a spline, and the like, and a motor that rotationally drives the gear. Thereby, the rotation driving means and the axial position adjusting means can be collected on one shaft end side (drive side) of the roll, and the 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 so as to face each other in parallel, and the forming roll pair device performs forming through a sheet between the rolls.
One roll is constituted by the roll of the roll device according to claim 1 , and the other roll has a pattern engraved on the outer peripheral surface thereof, and is translated in parallel with the roll interval adjusting motor in the radial direction with respect to the one roll. And the other roll is rotatable about its own central axis.
According to the forming roll pair device according to the present invention, the two rolls share the functions of axial phase adjustment and roll gap opening / closing, respectively, so that the mechanism can be simplified and highly structured. It is a roll for forming shape whose pattern is engraved on the outer peripheral surface, and can form forming shapes such as optical plastic sheets with high accuracy.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below 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 and 13 are fixedly attached to the operation side 10A and the drive side 10B of the frame 10, respectively. The roll bearing boxes 12 and 13 are configured so that roll shafts 14 and 15 formed integrally at both ends of the roll 11 can be rotated around their own central axes by cylindrical roller bearings (radial bearings) 16 and 17, respectively, and axially (see FIG. To the left and right).
[0025]
Roll bearing boxes 46 and 47 are provided on the operation side 10 </ b> A and the drive side 10 </ b> B of the frame 10 so as to be movable in a direction in which the roll bearing boxes 46 and 47 are separated from the roll 11 in the radial direction. Roll bearing housings 46 and 47 are formed by rolling roller shafts 49 and 50 integrally formed on both ends of another roll 48, respectively, cylindrical roller radial bearings 51 and 52, cylindrical roller thrust bearing 54 (a thrust bearing is a roll bearing housing 47 on one side). Only) so as to be rotatable about its own central axis, and supported so as not to move 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 surfaces of the rolls 11 and 48 as rolls for forming.
[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 in the roll axis direction through a gear box 20 fixedly arranged on the drive side 10B of the frame 10 and a hollow gear shaft 22 rotatably provided in the gear box 20 by a rolling radial bearing 21. Yes.
[0028]
The roll drive shaft 19 is connected to the hollow gear shaft 22 in a torque transmission relationship so as to be displaceable in the roll axis direction by a sliding key, a spline 23, and the like. The hollow gear shaft 22 supports the 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 is engaged with the drive gear 24.
[0029]
The rotational force of the roll rotation drive motor 25 is transmitted to the roll shaft 15 by the motor shaft 26, the gear 27, the drive gear 24, the hollow gear shaft 22, the sliding key or spline 23, the roll drive shaft 19, and the coupling 18, and this rotation. Due to the force transmission, the roll 11 rotates around its 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 disposed on the same axis as the roll drive shaft 19. The coupling shaft 32 is supported by a radial roller bearing 30 and a thrust roller bearing 31 disposed in the rotary case 29 so that the coupling shaft 32 cannot be displaced in the axial direction (roll axis direction) relative to the rotary case 29 and is relatively rotatable. Has been.
[0031]
The rotary 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 radial roller bearing 30 and the thrust roller bearing 31 described above, and the axial force from the displacement member 34 rolls. This is transmitted to the position of the central axis of the drive shaft 19. The thrust rolling bearing 31 is given a preload, 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, and a roll shaft is provided by a linear guide 37 provided on the drive side 10B of the frame 10. It can be displaced in the same direction as the direction. The ball nut member 36 is disposed on the same axis as the central axis of the roll 11, and a ball screw rod 38 is threadedly engaged with the ball nut member 36.
[0033]
The ball screw rod 38 is rotatably supported by a radial roller bearing 40 and a thrust roller bearing 41 provided in the 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 adjusting 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. Roll axis direction phase adjustment is performed by this axial movement.
[0035]
Here, the arrangement positions of the respective elements are summarized as follows: roll shafts 14 and 15, coupling 18, roll drive shaft 19, rotary sliding coupling 28 rotating case 29, coupling shaft 32, ball nut member 33, ball screw rod 38 are all on the same axis as the central axis of the roll 11.
[0036]
For this reason, an axial force is applied to the central axis position of the roll 11 from the displacement member 34, the roll 11 moves in the axial direction without an offset, and adjustment of the axial phase of the roll 11 causes a bending moment due to the offset. It is carried out with high accuracy without accompanying.
[0037]
The bearing housings 46 and 47 of the roll 48 are translated in the gap direction between the rolls (roll radial direction) by feed screws 58 and 59 driven by the inter-roll gap adjusting motors 56 and 57, respectively. 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 rotational 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 roll 48 rotates around its own central axis by this rotational force transmission.
[0039]
As a result, the rolls 11 and 48 each share the functions of axial phase adjustment and roll gap opening / closing, thereby simplifying and increasing the structure of the mechanism and eliminating uncertain behavior. By these things, a highly accurate shaping form can be performed.
[0040]
【The invention's effect】
As understood from the above description, according to the roll device and the forming roll pair device according to the present invention, by eliminating the offset of the axial phase adjusting mechanism, the occurrence of the twist phenomenon caused by the offset can be avoided. The two rolls share the functions of axial phase adjustment and roll gap opening / closing so that elastic deformation due to insufficient rigidity can be avoided and a highly accurate shaping can be performed.
[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 the roll on the axial phase adjustment side of one embodiment of the roll device and the 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 the 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 Rotating sliding coupling 25 Roll rotational drive motor 29 Rotating 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 Motor for adjusting the gap between rolls 61 Roll rotation drive motor

Claims (2)

A roll which is engraved is movably supported rotatably and axially around more its center axis integrally molded bearing means fixedly arranged roll axis, respectively, and a pattern on an outer circumferential surface at both ends,
A rotation driving means for rotating the rolls,
An axial position adjusting means for moving the roll in the axial direction;
The axial position adjusting means comprises a threaded rod which is rotated by the motor, the roll central axis displaced in the axial direction in the same direction of the roll by the rotation of the threaded rod is the threaded rod and the threaded engagement detent same axis and a displacement member provided with the arranged nut member on the line, rotary slide coupling the displacement member comprises a combination of axial force radical rolling bearing and the thrust rolling bearing of the transmission to the central axis position of the roll and Is connected to a roll shaft integrally formed at one end of the roll via a roll drive shaft, and moves the roll in the axial direction by applying an axial force to the roll .
The rotation drive means is attached to a drive gear connected to the roll drive shaft in a torque transmission relationship by a slip key, a spline, etc., and a motor shaft of a motor that meshes with the drive gear and rotationally drives the drive gear. A roll device comprising: a gear. In a forming roll pair apparatus that includes two rolls provided opposite to each other in parallel and performs molding through a sheet between the rolls,
One roll is constituted by the roll of the roll device according to claim 1 , and the other roll has a pattern engraved on the outer peripheral surface thereof, and is translated in parallel with the roll interval adjusting motor in the radial direction with respect to the one roll. The forming roll pair device is characterized in that the other roll can be contacted / separated and the other roll is rotatable about its central axis .

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