JP5648254B2 - Long sheet body guide device - Google Patents

Description

  The present invention relates to a guide device for a long sheet body, and more particularly to a guide device for a long sheet body for preventing meandering during the transfer of a long sheet body such as a nonwoven fabric, paper, or film.

  As an apparatus for preventing meandering during the transfer of a long sheet body, for example, a configuration disclosed in Patent Document 1 is known. In this guide device, as shown in FIG. 5, a carry-in roll 50 and a discharge roll 51 for receiving and discharging a web are rotatably supported by a swing frame 52, and the swing frame 52 is supported by a fixed portion 53. On the other hand, it is provided so as to be able to swing. The amount of misalignment of the running web is detected by a sensor 54 installed in the vicinity of the side edge of the web, and the swinging device 60 (FIG. 6) swings the swinging frame 52 based on this detection. Prevent web meandering.

  6, the swing device 60 includes a pinion 62 provided on the output shaft of the power unit 61 and an arcuate rack 63 that meshes with the pinion 62. The racks 63 are attached to the fixed portion 53 and the swing frame 52, respectively.

JP 2004-43179 A

  By the way, since there is an increasing need for speeding up the transfer of a long sheet body for the purpose of improving production efficiency, it is necessary to appropriately guide the sheet body that travels at a high speed to the guide device. It is said.

  However, in the configuration of Patent Document 1, the swing frame 52 is swingably provided on the fixed frame 53 via the pinion 62 and the rack 63 of the swing device 60, so that the swing frame 52 is driven at high speed. If the rocker is swung violently, a reverse input torque from the rocking frame 52 side due to an inertial force or the like may be transmitted to the power unit 61, and the load and power consumption of the motor increase. Positioning control was difficult.

  Then, this invention aims at provision of the guide apparatus of the long sheet body which can prevent the meandering of the long sheet body conveyed at high speed reliably at low cost.

The object of the present invention is to provide a reduction gear having an input shaft driven by driving means and an output shaft extending in the vertical direction, and a rocking body fixed to the upper end of the output shaft so as to be rockable along a horizontal plane. A pair of guide rollers rotatably provided on the swinging body for guiding the transfer of the long sheet body, a position detector for detecting the position of the long sheet body to be transferred, and detection by the position detector And a control device for controlling the driving of the driving means based on the swaying mechanism, wherein the speed reducer is arranged so that a worm provided on the input shaft meshes with a worm wheel provided on the output shaft, and worm reducer der having a self-locking feature that is configured to prevent rotation of said input shaft from the output shaft side with the swing of the moving object is, the rocking body, and the output shaft projecting downward Mating fit A reinforcing support fixed to the speed reducer so as to accommodate the fitting receiving portion is provided between the speed reducer and the rocking body; This is achieved by a long sheet body guide device provided with a bearing for supporting a thrust load and a radial load acting on the output shaft in contact with the fitting receiving portion on the inner wall surface of the hollow housing .

  In the guide device for the long sheet body, the output shaft is disposed such that, of the pair of guide rollers, the guide roller on the upstream side in the transfer direction of the long sheet body overlaps in a plan view. Is preferred.

  According to the present invention, the configuration for driving the rocking body can be simplified, and the drive control can be performed with high accuracy, so that it is possible to reliably prevent meandering of the long sheet member transferred at high speed at low cost. It is possible to provide a guide device for a long sheet body that can be used.

It is a side view which shows the guide apparatus of the elongate sheet body which concerns on one Embodiment of this invention in a partial cross section. It is a top view of the guide apparatus of the elongate sheet body shown in FIG. It is a block diagram which shows schematic structure of the control apparatus in the guide apparatus of the elongate sheet | seat body shown in FIG. It is a principal part side view which shows the guide apparatus of the elongate sheet body which concerns on other embodiment of this invention in a partial cross section. It is a perspective view of the conventional guide apparatus. It is a top view of the guide apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view showing a guide device for a long sheet body according to an embodiment of the present invention in a partial cross section, and FIG. 2 is a plan view of FIG. As shown in FIGS. 1 and 2, a long sheet body guide device 1 includes a servo motor 2 as a driving means, a speed reducer 3, a rocking body 4, a pair of guide rollers 5, 6, a position detector 7, and a control. A device (not shown) is provided as a main component. In this embodiment, the servo motor 2 uses a three-phase AC servo motor from the viewpoint of high speed and high accuracy, and is configured such that the magnetic pole position of each phase is detected by the encoder 2a. It is fixed on the plate 8 by a bracket 8a. The servo motor 2 can also use other inexpensive driving means such as a DC brushless motor or a stepping motor.

  The speed reducer 3 includes an input shaft 13 coupled by a coupling 12 so that the axis of the output shaft 11 of the servo motor 2 coincides with an output shaft 14 and an output shaft 14 coupled to the oscillator 4. 8 is provided. The input shaft 13 is disposed so as to extend horizontally, the distal end side is accommodated in the housing 15, and is rotatably supported on the side wall of the housing 15 via a bearing 16. A worm 17 is fixed to a portion of the input shaft 13 accommodated in the housing 15. The input shaft 13 of the speed reducer 3 can be directly connected to the servo motor 2 by the coupling 12, and the output shaft itself of the servo motor 2 can be used as the input shaft 13 of the speed reducer 3. Although not shown in FIG. 1, the distal end side of the input shaft 13 can also be rotatably supported by a bearing.

  The output shaft 14 is disposed so as to extend in the vertical direction within the housing 15, and an expanded fitting portion 18 is provided at the upper end of the output shaft 14 so as to protrude above the housing 15. . A thrust bearing 19 is interposed between the upper portion of the housing 15 and the fitting portion 18. A bearing 20 is interposed between the lower part of the housing 15 and the lower part of the output shaft 14. With such a configuration, the output shaft 14 is supported at the upper and lower portions of the housing 15 so as to be rotatable while receiving a load from above. A collar 21 for fixing the bearing 20 is provided at the lower end of the output shaft 14. A worm wheel 22 is fixed to the output shaft 14 so as to mesh with the worm 17, and the rotational force of the input shaft 13 is transmitted to the output shaft 14.

  The speed reducer 3 of the present embodiment has a self-locking function configured to prevent rotation of the input shaft 13 from the output shaft 14 side due to swinging of the swinging body 4 described later. Specifically, when the advance angle of the worm 17 is set to a small value (for example, about 3 degrees) and a reverse input torque is applied to the output shaft 14, a large frictional force is generated between the worm 17 and the worm wheel 22. Configured to occur.

  The oscillating body 4 includes a horizontal bottom plate 23 and a pair of side plates 24 and 25 erected from both sides of the bottom plate 23, and a pair of guide rollers 5 and 6 are rotatable between the pair of side plates 24 and 25. It is supported. The pair of guide rollers 5 and 6 are arranged in parallel at the same height position, and guide the transfer of the web w, which is a long sheet body, in the direction of arrow A. The bottom plate 23 is provided with a hollow cylindrical fitting receiving portion 26 that protrudes downward. When the fitting portion 18 of the output shaft 14 is fitted into the fitting receiving portion 26, the output shaft 14 rotates forward and backward. Accordingly, the oscillating body 4 oscillates in the direction of arrow B in FIG. 2 along the horizontal plane. The insertion portion 18 of the output shaft 14 is at least partially overlapped with the guide roller 5 located on the upstream side in the web w transfer direction (arrow A direction) of the two guide rollers 5 and 6 in plan view. Further, it is preferable that the guide roller 5 is positioned at the center in the axial direction. By providing the fitting receiving portion 26 so that the fitting portion 18 has such an arrangement, the axis of the guide roller 6 on the downstream side in the transfer direction can be greatly inclined by the slight rotation of the output shaft 14, and the swinging portion 18 can be swung. This is particularly effective when the moving body 4 is swung at a high speed.

  The position detector 7 is a known edge detector that detects a side edge of the web w, and is supported by a bracket (not shown) to detect a deviation from a predetermined position in the width direction perpendicular to the transfer direction of the web w. . In the present embodiment, the position detectors 7 are arranged so as to detect one side edge of the web w, but a plurality of position detectors 7 may be arranged so as to detect both side edges of the web w.

  As shown in FIG. 3, the edge position of the web w detected by the position detector 7 is input in real time to a control device 32 such as a PLC (Programmable Logic Controller) via an edge sensor amplifier 31. In the control device 32, the reference position S of the web w detected by the position detector 7 is stored as a set value in the memory 33, and the measured value (current value) from the position detector 7 and the memory 33 are compared in the comparator 34. And the deviation is input to the calculator 35. The calculator 35 performs calculation processing such as PID calculation on the deviation input from the comparator 34 and outputs a control value. This control value is input to the servo motor 2 via the servo amplifier 36, and drive control of the servo motor 2 is performed by feedback control based on detection of the encoder 2a. That is, in FIG. 2, when the web w is shifted to the left on the roller 6, the support shaft 18 is rotated counterclockwise to swing the rocking body 4 in the direction of arrow C, while the web w is on the right on the roller 6. If it is offset, the support shaft 18 is rotated to the right to swing the rocking body 4 in the direction indicated by the arrow D, and the rocking speed corresponding to the deviation from the set value is given to the servo motor 2.

  Further, a limit switch 27 is provided on the upper surface of the housing 15 via a bracket, and on the lower surface side of the oscillating body 4, there are docks 28 (front side in FIG. 1) on both sides of the oscillating direction across the limit switch 27. (Only one side is shown) is provided, and when the swinging is abnormal, the dock 28 operates the limit switch 27, whereby excessive swinging of the swinging body 4 can be suppressed.

  According to the long sheet body guide device 1 having the above-described configuration, since the speed reducer 3 is a worm speed reducer, the backlash between the worm 17 as the meshing portion and the worm wheel 22 is reduced by the conventional rack and pinion mechanism. It can be easily reduced (for example, 0.9 degree). Therefore, it is possible to control the swinging of the swinging body 4 by the forward / reverse rotation of the servo motor 2 at high speed.

  Further, the reduction gear 3 rotates the input shaft 13 by the frictional force generated between the worm 17 and the worm wheel 22 even when the inertia force due to the high-speed swing of the swing body 4 acts on the output shaft 14 as a reverse input torque. Since it has a so-called self-locking function configured to prevent the servo motor 2 from increasing, it is possible to suppress an increase in load and power consumption of the servo motor 2 and to have excellent high-speed tracking performance with a simple configuration. And cost reduction can be achieved.

  As described above, the long sheet body guide device 1 according to the present embodiment is configured so that the web w on the pair of guide rollers 5 and 6 is transferred even when the web w is transferred at a high speed (for example, about 300 m / min). Thus, the swinging of the swinging body 4 can be appropriately followed with respect to the deviation of the web w, and the meandering of the web w can be reliably prevented. As a result, there are excellent effects such as improvement in productivity and downsizing of manufacturing equipment.

  In the present embodiment, the load acting on the output shaft 14 due to the weight and rotation of the oscillator 4 is supported by the bearings 19 and 20 provided in the speed reducer 3, but as shown in FIG. In addition, the reinforcing support 40 may be provided on the upper surface of the speed reducer 3 so that the thrust load and the radial load acting on the output shaft 14 are supported by the reinforcing support 40. FIG. 4 is a main part side view showing the vicinity of the reinforcing support 40 of the long sheet guide device, and only the reinforcing support 40 is shown in cross section. In FIG. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Although the input shaft of the speed reducer 3 is not shown in FIG. 4, it is preferably arranged in the horizontal direction. For example, the rotation shafts of the guide rollers 5 and 6 are the same as the input shaft 13 shown in FIG. In addition to the arrangement orthogonal to the guide roller, an arrangement parallel to the rotation axis of the guide roller may be used.

  The reinforcing support 40 includes a bearing 44 on an inner wall surface 41a of a hollow housing 41 formed in a rectangular parallelepiped block shape, and has bolt holes at four corners so as to accommodate the fitting receiving portion 26 of the swinging body 4. It is fixed to the speed reducer 3 by a bolt 52 inserted through. The output shaft 14 and the fitting receiving portion 26 are fitted so as to rotate integrally by a key and a key groove. In the bearing 44, a plurality of balls 46 are arranged at equal intervals in the circumferential direction between the inner ring 45 and the outer ring 47, and grooves for guiding the balls 46 are formed on the outer peripheral surface of the inner ring 45 and the inner peripheral surface of the outer ring 47. It is a deep groove ball bearing and can support a thrust load and a radial load between the inner ring 45 and the outer ring 47. The inner ring 45 and the outer ring 47 are in contact with stepped portions 26 a and 41 b formed on the fitting receiving portion 26 and the inner wall surface 41 a of the housing 41, respectively. It can be supported by the support tool 40. The bearing 44 may be another bearing capable of supporting a thrust load and a radial load, or may be configured to support the thrust load and the radial load by different bearings.

  By providing such a reinforcing support 40, the output shaft 14 that supports the rocking body 4 can be reinforced, and the output shaft 14 can smoothly rotate even when the rocking body 4 rocks at high speed. The followability and durability of the oscillating body 4 can be maintained well.

1 Long sheet body guide device 2 Servo motor (drive means)
DESCRIPTION OF SYMBOLS 3 Reducer 4 Oscillator 5, 6 Guide roller 7 Position detector 13 Input shaft 14 Output shaft 17 Worm 22 Worm wheel 32 Controller 40 Reinforcement support tool 44 Bearing

Claims (2)

A speed reducer having an input shaft driven by driving means and an output shaft extending in the vertical direction;
A swing body fixed to the upper end of the output shaft so as to be swingable along a horizontal plane;
A pair of guide rollers provided rotatably on the rocking body for guiding the transfer of the long sheet body;
A position detector for detecting the position of the long sheet to be transferred;
A control device for controlling the driving of the driving means based on the detection of the position detector,
The speed reducer is arranged such that a worm provided on the input shaft meshes with a worm wheel provided on the output shaft, and the rotation of the input shaft from the output shaft side accompanying the swing of the swing body worm reducer der having configured self-locking feature to prevent is,
The oscillating body includes a fitting receiving portion that protrudes downward and engages with the output shaft.
Between the speed reducer and the rocking body, a reinforcing support fixed to the speed reducer so as to accommodate the fitting receiving portion is provided,
The reinforcing support is a guide device for a long sheet body comprising a bearing for supporting a thrust load and a radial load acting on the output shaft by contacting the fitting receiving portion on an inner wall surface of a hollow housing .   2. The long sheet body according to claim 1, wherein the output shaft is disposed such that, of the pair of guide rollers, the guide roller on the upstream side in the transport direction of the long sheet body overlaps in a plan view. Guide device.

Images