JPH0536353B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cable winding device used, for example, in feeding power from a fixed part to a rotating part of a swing-type suspended beam.

(Prior art and its problems) Conventionally, in a swing-type suspension beam, when passing a cable between a fixed part and a swing part, the cable is slackened so as to follow the turning movement of the swing part, and the cable is The fixed part side cable and the swivel part side cable were connected by supporting the part with a hanger or by using a slip ring device or the like.

However, with the former method, when the turning angle is small, the cable slack is small and there is no problem, but when the turning angle is large, the cable may twist, rub against the turning part, etc., and cable breakage may occur. . Further, in the latter method, if a slip ring device is used, it has to be attached to the pivot center, which is complicated and costly, and there are disadvantages in that it is necessary to use a complicated and large pivot mechanism.

Therefore, as a measure to eliminate such conventional inconveniences, the cable winding device for a mobile object such as a crane disclosed in Japanese Patent Application Laid-Open No. 58-125576 is applied, and the rotating drum is used as the cable winding drum on the swivel part side, and The idea is to use the fixed drum as the cable winding drum on the fixed part side, and to move the cable between the two cable winding drums via a cable pulley that follows and rotates around the center of rotation at a constant speed ratio with respect to the swing part. However, in order to rotate the arm that supports the cable pulley on the rotation axis at a constant speed ratio, it is necessary to attach one end of the arm to the rotation axis via a transmission mechanism such as an eddy current clutch, making the configuration complicated. , and the inconvenience of high cost cannot be avoided.

(Objective of the Invention) It is an object of the present invention to reliably and easily eliminate the disadvantages of the cable winding device described in the above publication.

(Means for Solving the Problems) A cable winding device for a rotating part of the present invention has a fixed part and a rotating part rotatably connected to the fixed part via a pivot shaft, each having the same outer diameter. is 2
A pair of cable winding drum and rope winding drum are provided integrally and concentrically with the turning shaft, and an arm rotatably attached to the turning shaft via a boss is provided in the middle,
A cable pulley and a rope pulley are attached to both ends of the arm, and both ends of the cable hung on the cable pulley are wound in the same winding direction around the cable winding drums provided at the fixed part and the swivel part. It is characterized in that both ends of the rope hung on the pulley are wound around rope winding drums provided at the fixed part and the turning part in opposite directions to the cable winding trunks and in the same winding direction.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a fixed part, and a pivot shaft 2 is rotatably suspended from the fixed part 1 in a vertical axis state by bearings 3 and 4.

The rotating shaft 2 is configured to be rotated forward and backward by a rotating motor 5 provided on the fixed part 1 via a speed reducer 6, and the lower end of the rotating shaft 2 is equipped with a hanging beam or a cable winding provided on a moving body. A rotating part 7 such as a reel is attached.

8A is a cable winding drum, and 9A is a rope winding drum, which are provided integrally at the lower part of the fixed part 1 and concentrically with the pivot shaft 2, and have the same outer diameter.

8B is a cable winding drum, and 9B is a rope winding drum, which are provided integrally at the upper part of the turning section 7 and concentrically with the turning shaft 2, and have the same outer diameter as the cable winding drum 8A and the rope winding drum 9A. have.

Reference numeral 10 denotes an arm, which is attached to the pivot shaft 2 at the middle (approximately the center in the embodiment) by a boss 11 so as to be rotatable via a bearing 12 and prevented from moving in the axial direction via a sleeve 13; It is arranged between the fixed part 1 and the rotating part 7.

A cable pulley 14 is rotatably attached to one end of the arm 10.

A rope pulley 15 is rotatably attached to the other end of the arm 10.

Reference numeral 16 denotes a cable, and both ends thereof are wound in the same winding direction around the cable winding trunk 8A provided on the fixed part 1 and the cable winding trunk 9A provided on the swinging part 7, and the intermediate part is attached to the cable winding trunk 8A provided on the fixed part 1 It is hung on a cable pulley 14 provided at one end.

17 is a wire rope, and the cable 1 is connected to the rope winding trunk 8B provided on the fixed part 1 and the rope winding trunk 9B provided on the turning part 7, and the cable winding trunks 8A and 9A on both ends thereof.
6 and are wound in the same winding direction, and the intermediate portion is hung on a rope pulley 15 provided at the other end of the arm 10.

(Function) When the turning section 7 is turned around the turning axis 2 in the direction of the arrow shown in FIG. 3, the cable 16 is wound around the cable winding drum 8B on the side of the turning section 7, and the cable pulley 14 Since a pulling force is generated in the winding direction of 8A and 8B, cable pulley 1
4 is able to pivot around the pivot axis 2 in the same direction as the pivoting direction of the pivoting section 7 at a speed of 1/2 of the pivoting speed of the pivoting section 7 due to its force perpendicular to the arm 10. At that time, the rope pulley 15 is rotated in the same direction and at the same speed via the arm 10, and the wire rope 17 is wound around the rope winding drum 9A on the fixed part 1 side, and the rope pulley 15 is turned around the rope winding drum 9A. Since the pulling force on the winding direction side of cable winding drums 8A and 9B, that is, on the opposite side to the winding direction side of cable winding drums 8A and 8B, is generated in contrast to the pulling force on the cable pulley 14, the cable tension and the wire rope tension are Balance. Therefore, the turning of the cable pulley 14 becomes stable.

(Effects of the Invention) As described above, the present invention allows the cable pulley to be swung around the swivel axis at 1/2 the swiveling speed in the same direction as the swiveling direction of the swiveling section, since the addition of a rope winding mechanism is sufficient. The structure is simple, which is advantageous in terms of maintenance and equipment costs, and it is possible to reliably eliminate inconveniences caused by cable twisting and the like.

[Brief explanation of the drawing]

FIG. 1 is a schematic front sectional view showing one embodiment of the present invention, FIG. 2 is a schematic diagram showing how to hang cables and wire ropes, and FIG. 3 is an explanatory diagram of the operation. 1...Fixed part, 2...Swivel shaft, 3, 4...Bearing, 5...Swivel motor, 6...Reducer, 7...Swivel part, 8A, 8B...Cable winding drum, 9A, 9B
...Rope winding barrel, 10...Arm, 12...Bearing, 14...Cable pulley, 15...Rope pulley, 16...Cable, 17...Wire rope.

Claims (1)

[Claims] 1. Two sets of cable winding drums and rope winding drums, each having the same outer diameter, are integrally attached to a fixed part and a rotating part that is rotatably connected to the fixed part via a turning shaft, and are concentric with the turning shaft. At the same time, an arm is rotatably attached to the pivot shaft via a boss in the middle, a cable pulley and a rope pulley are attached to both ends of the arm, and both ends of the cable hung on the cable pulley are fixed. Wrap both ends of the rope around the rope pulleys in the same winding direction around the cable winding drums provided at the fixed part and the swinging part. 1. A cable winding device for a rotating part, characterized in that the cables are wound in opposite directions and in the same winding direction.