JP2017077047A - Extension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire extension device capable of reliably preventing loosening of a rope during a wire extension operation.SOLUTION: An extension device 1 includes: a drive motor 20; a drive shaft 23 rotatably driven by the drive motor 20; a reel 40 rotatably supported around a rotation shaft 41 and wound with a rope 50 for extension; and a slip clutch 30 for friction coupling the drive shaft 23 and the rotation shaft 41. The extension device provides the reel 40 rotating in a feeding direction of the rope 50 with a braking force by rotationally driving the drive shaft 23 in a winding direction of the rope 50.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wire-drawing device that is mounted on a radio-controlled flying body and performs wire drawing of a pilot rope or the like.

  As a conventional wire-drawing device, Patent Document 1 discloses a configuration in which a drum around which a pilot rope is wound is attached to an unmanned helicopter and flying by remote control to perform an overhead wire. The drum is equipped with a brake device that prevents the pilot rope from being extended when hovering. When the tension of the pilot rope increases, the drum rotation brake is weakened by the brake device, so that the pilot from the drum is accelerated when the unmanned helicopter accelerates. The rope can be drawn out smoothly.

JP-A-7-143628

  The above conventional wire drawing device adjusts the amount of pilot rope fed out from the drum according to the tension, but cannot wind the pilot rope around the drum, so the pilot unmanned helicopter moves backward or changes direction, etc. There was a risk that the rope would sag and get entangled in the aircraft.

  Then, an object of this invention is to provide the wire drawing apparatus which can prevent the slack of the rope during wire drawing work reliably.

  The object of the present invention is to provide a drive motor, a drive shaft that is rotationally driven by the drive motor, a reel that is rotatably supported around the rotation shaft and wound with a wire rope, and the drive shaft. A wire-drawing device that includes a slip clutch that frictionally couples with the rotating shaft, and that applies a braking force to the reel that rotates in the unwinding direction of the rope by rotationally driving the driving shaft in the winding direction of the rope. Is achieved.

  The wire drawing device preferably includes a rotation shaft detection unit that detects the number of rotations and a rotation direction of the rotation shaft, and a control device that controls the driving of the drive motor based on the detection of the rotation shaft detection unit. Furthermore, it is preferable that a rotation direction display unit that displays the detected rotation direction of the rotation axis is provided.

  Moreover, it is preferable to provide a lock device for forcibly stopping the rotation of the reel.

  ADVANTAGE OF THE INVENTION According to this invention, the wire drawing apparatus which can prevent the slack of the rope during wire drawing work reliably can be provided.

It is a perspective view of the wire drawing apparatus which concerns on one Embodiment of this invention. It is a schematic side view which shows the internal structure of the wire drawing apparatus shown in FIG. It is a schematic diagram for demonstrating the usage method of the wire drawing apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a wire drawing device according to an embodiment of the invention, and FIG. 2 is a schematic side view showing an internal structure of the wire drawing device shown in FIG. In the wire drawing device 1 shown in FIG. 1, the device main body 10 shown in FIG. 2 is accommodated in the casing 2, and the upper portion of the casing 2 is covered with a lid 3. The lid 3 is provided with an attachment portion 4 that is detachably attached to a radio-controlled flying body such as an unmanned helicopter.

  As shown in FIG. 2, the apparatus main body 10 is connected to a drive motor 20 such as a servo motor attached to a support member 12 erected on a support base 11, and to the drive motor 20 via gears 21 and 22. And a slip clutch 30 and a reel 40 that are loosely inserted into the drive shaft 23 and integrated with each other.

  The drive shaft 23 extends from the gear 22 provided on the base end side through an insertion hole formed in the support member 12 and the support column 25, and the holding member 24 that holds the slip clutch 30 and the reel 40 has a leading end. Is provided. The drive shaft 23 is rotatably supported by bearings 26 and 29 provided on the support column 25 and the support member 12, respectively.

  The reel 40 includes a hollow cylindrical rotating shaft 41, and the drive shaft 23 is inserted through the inner peripheral surface of the rotating shaft 41 with a slight gap. A bearing 43 supported by a bracket 42 is provided at the front end of the reel 40 in the axial direction, and the reel 40 is rotatably held around the rotation shaft 41 with respect to the drive shaft 23. An extension rope 50 such as a pilot rope is wound around the rotary shaft 41.

  The slip clutch 30 includes a cylindrical cylinder 31 fixed to the axial base end of the reel 40 and a slip member 32 provided inside the cylinder 31. The slip member 32 is biased toward the proximal end side by a built-in spring member (not shown), and abuts on a clutch member 27 fixed to the outer periphery of the drive shaft 23. As a result, the drive shaft 23 and the rotary shaft 41 are friction-coupled, and slippage occurs between the clutch member 27 and the slip member 32 when a torque load (for example, about 35 mN · m) exceeding a certain level is applied to the reel 40. It is configured as follows.

  The rotational speed of the drive shaft 23 is detected by detecting a marking provided on the base end surface 27 a of the clutch member 27 by the drive shaft detection unit 28 provided on the support column 25. When the drive motor 20 includes an encoder, the rotation speed of the drive shaft 23 can be detected from the rotation speed and the gear ratio of the drive motor 20.

  The support column 25 is provided with a rotation axis detector 33 that detects the number of rotations and the rotation direction of the rotation axis 41. The rotation axis detection unit 33 is an optical sensor that detects the marking of the flange portion 31 a provided on the proximal end side of the cylindrical body 31, and a plurality of rotation axis detection units 33 are provided so as to detect forward and reverse rotations, respectively. . The configuration of the rotation axis detection unit 33 is not limited to that of the present embodiment, and a sensor using another known method may be used. Further, instead of detecting the rotational speed of the rotary shaft 41, a torque sensor for detecting the torque of the rotary shaft 41 may be arranged.

  Detection signals from the drive shaft detection unit 28 and the rotation shaft detection unit 33 are input to the control device 13 housed in the support base 11, and the control device 13 controls the rotation speed of the drive motor 20.

  A lock device 35 is provided in the vicinity of the slip clutch 30 on the surface of the support base 11. The locking device 35 includes a pair of clamping members 36 and 36 that can clamp a rib 34 formed on the outer peripheral surface of the cylindrical body 31 over the entire circumference by driving a servo motor (not shown). By pinching the ribs 34 during rotation, the reel 40 can be forcibly stopped.

  As shown in FIG. 1, the tip of the rope 50 wound around the reel 40 is taken out from the outlet 5 formed on the side surface of the casing 2 and is provided at the tip of the rod 6 extending from the lid 3. 6a is inserted and guided to the outside. On both sides of the drive shaft of the casing 2, there are provided rotation direction display units 7 for displaying the rotation direction of the rotation shaft 41 detected by the rotation shaft detection unit 33. The rotation direction indicator 7 is composed of two lamps having different colors in this embodiment. When the rotation shaft 41 rotates in the direction in which the rope 50 is fed out, the blue lamp is lit and the rotation shaft 41 winds the rope 50. The red lamp lights up when rotating in the direction of taking. The two lamps of the rotation direction display unit 7 may be configured to blink at a blinking speed corresponding to the rotation speed of the rotation shaft 41. The rotation direction display unit 7 may have another configuration as long as it is visible to the operator. On the side surface of the casing 2, a power switch 8 and a winding button 9 for winding the rope 50 around the rotary shaft 41 are further provided.

  As shown in FIG. 3, the wire-drawing device 1 having the above-described configuration is attached to a radio-controlled flying body F, and the tip of a rope 50 made of a fine thread such as Teggs is fixed to a fixing portion A. When M1 operates the controller 60, the rope 50 can be fed to the destination while being fed out. When the flying object F moves forward, the reel 40 shown in FIG. 2 rotates in the direction in which the rope 50 is unwound, while the drive motor 20 drives the drive shaft 23 in the direction in which the reel 40 winds up the rope 50. . As a result, slip occurs in the slip clutch 30 and a braking force is applied to the reel 40 so that the tension of the rope 50 is constant. On the other hand, since the rope 50 is not unwound when the flying object F moves backward, the reel 40 rotates in the direction of winding the rope 50 together with the drive shaft 23, and the tension of the rope 50 is maintained.

  As described above, the wire-drawing device 1 according to the present embodiment can prevent the rope 50 from slacking regardless of the flying state of the flying object F. Can be done smoothly. In addition, since the load of the flying object F becomes constant because the tension of the rope 50 is kept constant, the operability is good even when a small flying object F (for example, about 1.5 kg) is used, It is possible to easily perform a wire drawing operation for a long distance (for example, about 500 m). Furthermore, since the small flying object F can be used, the problem of noise hardly occurs, and damage caused by a crash can be minimized.

  The control device 13 receives an input of the rotation speed and rotation direction of the rotation shaft 41 from the rotation shaft detector 33, and rotates the drive shaft 23 when the rotation shaft 41 rotates at a high speed in the feeding direction of the rope 50. The drive of the drive motor 20 is controlled so that the number becomes low. Thereby, it can suppress that the heat_generation | fever by slip of the slip clutch 30 becomes excessive, can prevent damage and deformation | transformation of components, and can maintain durability favorably. On the other hand, when the rotating shaft 41 rotates in the winding direction of the rope 50, the control device 13 controls the driving of the driving motor 20 so that the number of rotations of the driving shaft 41 in the winding direction increases. Thereby, the number of rotations in the winding direction of the reel 40 increases, and the tension of the rope 50 can be easily maintained. As described above, the control device 13 controls the drive of the drive motor 20 based on the detection of the rotation speed and the rotation direction of the rotary shaft 41, so that the rope 50 can be more reliably prevented from loosening.

  The control of the flying object F can be taken over by another pilot M2 in the vicinity of the destination, for example, when the pilot M1 inputs a switching signal by operating the controller 60. Thereby, even when the visibility of the destination from the pilot M1 is poor, the wire drawing device 1 can be reliably conveyed to the destination. Since the wire drawing device 1 is provided with the rotation direction display unit 7 for displaying the rotation direction of the reel 40, the pilots M1 and M2 can easily grasp the flight state of the flying object F, which is favorable. Maneuverability is obtained. In this way, after handing the rope 50 to the recipient of the destination, it is gradually replaced with another rope with high strength, and finally the work of extending the target object such as an electric wire or disaster rescue rope is completed. To do.

  In an emergency such as when the flying object F becomes uncontrollable, the lock device 35 is operated to stop the rotation of the reel 40, so that the feeding of the rope 50 is suppressed. be able to. When the rotation speed of the reel 40, the feeding length of the rope 50, the acceleration of the flying object F, etc. exceed a reference value, the operation of the locking device 35 receives a signal from a sensor for detecting these, and the control device 13 Can be done automatically. Alternatively, the pilots M <b> 1 and M <b> 2 can visually activate the lock device 50 by operating the controller 60 while viewing the state of the flying object F.

DESCRIPTION OF SYMBOLS 1 Wire drawing apparatus 7 Rotation direction display part 10 Apparatus main body 13 Control apparatus 20 Drive motor 23 Drive shaft 30 Slip clutch 33 Rotation axis detection part 35 Locking device 40 Reel 41 Rotation axis

Claims (4)

A drive motor;
A drive shaft that is rotationally driven by the drive motor;
A reel around which a rope for winding is wound and supported rotatably around a rotation axis;
A slip clutch that frictionally couples the drive shaft and the rotary shaft;
A wire-drawing device that applies a braking force to the reel that rotates in the rope feeding direction by rotationally driving the drive shaft in the winding direction of the rope. A rotation axis detector for detecting the rotation speed and rotation direction of the rotation axis;
The wire drawing device according to claim 1, further comprising: a control device that controls driving of the drive motor based on detection of the rotating shaft detection unit.   The wire drawing apparatus according to claim 2, further comprising a rotation direction display unit that displays a detected rotation direction of the rotation shaft.   The wire drawing device according to any one of claims 1 to 3, further comprising a lock device that forcibly stops the rotation of the reel.