JPH0333744Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Related Technical Field) The present invention relates to a power supply device for a revolving frame in a shipboard gantry crane or the like.

(Prior art) In a shipboard gantry crane, etc., a swinging trolley is rotatably supported by a shift trolley that can be shifted in the longitudinal direction of the ship on a traversing trolley, and a hoisting device installed on this swinging trolley. It is necessary to supply power to the drive motor etc.

FIG. 6 shows one method, in which the fixing member 16 and
If both ends of the power supply cable 18 are fixed across the rotation member 17, the power supply cable 18 and the cable attachment portions 19, 20 are subjected to bending and twisting when the power supply cable 18 is rotated around the rotation member 17, so that they are easily damaged. Therefore, as a measure to prevent damage, the power supply cable is allowed to hang down greatly, but this does not completely eliminate the problem and there is a drawback that a large space is required.

(Problem to be solved by the invention) If the rotating trolley does not need to make a full turn (360°), a power supply device that does not allow the power supply cable to hang down, minimizes the space required for wiring, and can prevent damage is provided. It is about providing.

(Solution of invention) In a crane in which a swinging trolley is swingably supported on a traversing trolley or a shift trolley, on the swinging trolley and near the center of swing,
Position the free end of the fixed-side power supply cable support arm extending from the traversing trolley or shift trolley, and position the free end of the swing-side power supply cable support arm provided on the revolving trolley near the center of rotation, and A power supply cable connected to a traversing trolley or a shift trolley and the other end connected to a rotating trolley is supported by both arms, and cleats for supporting the power cable are provided on both support arms at a distance from the center of rotation.

(Embodiment of the invention) Reference numeral 1 denotes a leg girder provided in a direction perpendicular to the longitudinal direction of the ship, on which a transverse trolley 2 is movably mounted via wheels 2a. Reference numeral 3 denotes a shift trolley that can be moved in the longitudinal direction of the ship on the traversing trolley 2 and can be fixed at a predetermined position, and a swing trolley 4 is further provided on the shift trolley so as to be able to turn.

Reference numeral 5 denotes a drum for winding up the lifting rope provided on the revolving trolley, and is driven by a motor 7 via a transmission device 6. A fixed cable support arm 8 extends from the shift trolley 3, and the free end of the arm 8 is positioned on the swing trolley 4 and near the center of swing. Reference numeral 21 denotes a swing-side cable support arm attached to the swing trolley 4. The arm 21 is provided at the same or approximately the same height as the tip of the fixed-side cable support arm 8, and its tip is located at the center of rotation of the swing trolley 4. located nearby. A power supply cable led out from the tip of the cable support arm 8 on the fixed side crosses the center of rotation and is connected to the rotating trolley side member via the cable support arm 21 on the rotation side.

Reference numeral 10 denotes a fixed power supply cable fixing cleat attached to the fixed cable support arm 8 at a distance from the center of rotation, and reference numeral 11 denotes a movable power supply cable on the rotation side attached to the cable support arm 21 at a distance from the center of rotation. Cleat 12 is a swing-side power supply cable fixing cleat attached to the base of the swing-side cable support arm 21.

The power supply cable 9 is connected to each cleat 1.
It is fixed to the support arms 8, 21 via 0, 11, 12. Reference numeral 13 denotes a guide for preventing sharp bending of the power supply cable attached to the power supply cable fixing cleat. Reference numeral 14 denotes a swing-side center post installed upright at the center of rotation of the swing trolley 4, and reference numeral 15 indicates a swing bearing provided on the center post.
5 supports the distal end of the fixed side cable support arm 8 via a bracket 22.

(Function) The power supply cable 9 is attached to the fixed side cable support arm 8
After passing through the fixed side power supply cable fixed cleat 10 on the shift trolley side, the movable cleat 11 is attached to the swing side cable support arm 21.
It is connected to each device on the rotating trolley 4 via the rotating side power supply cable fixing cleat 12. The power supply cable 9 is bent as shown in FIG. 5 by the 90° turning movement of the turning trolley 4.

The swing trolley 4 swings around the center post 14, and the free end of the fixed cable support arm 8 on the shift trolley 3 side is supported by a swing bearing 15 on the center post 14 via a bracket 22. The distance between the fixed side power feeding cable fixed cleat 10 on the shift trolley 3 side and the turning center, and the distance between the turning side power feeding cable movable cleat 12 on the swinging trolley 4 side and the turning center are determined by the radius of curvature of the feeding cable 9.

Then, when the power supply cable 9 is bent,
It is bent by the natural bending of the power supply cable 9. Furthermore, the swinging side power supply cable movable cleat 11 on the swinging trolley 4 prevents the power supply cable 9 from hanging down between the fixed side power supply cable fixing cleat 10 on the shift trolley side and the swinging side power supply cable fixing cleat 12, and swings its head in the direction of rotation. It moves like this.

In addition, in the case of a crane that does not have a shift trolley, the power supply cable support frame may be installed to extend from the traversing trolley.

(Effect of the invention) When a swinging trolley turns in a shipboard gantry crane, etc. and power is supplied to the hoisting device of the swinging trolley, if the swinging trolley does not need to make a full turn, the power supply cable is bent at the center of the turn. Since each cable support arm is supported by a cleat at a distance from the center of rotation, the cable can be freely bent between the respective cleats, and no strain is placed on the cable itself.

Furthermore, since the cable support arms that support the cables are simply attached to the respective trolleys, the structure is very simple and power can be easily supplied even in a limited space.

[Brief explanation of drawings]

FIG. 1 is a plan view of a power supply device for a rotating trolley equipped with the present invention. Figure 2 is also a front view. FIG. 3 is a view taken along the arrow in FIG. Figure 4 shows the state of the power supply cable when the rotating trolley has a rotating angle of 0°. Figure 5 shows the same situation when the turning angle is 90°. Figure 6 shows a conventional power supply device. In the figure: 1...Leg gutter, 2...Transverse trolley, 2a...Wheel, 3...Shift trolley, 4
... Rotating trolley, 5 ... Drum, 6 ... Transmission device, 7 ... Motor, 8 ... Fixed side power supply cable support arm, 9 ... Power supply cable, 10 ... Fixed side power supply cable fixing cleat, 11 ... Swivel side power supply cable movable cleat, 12... Swivel side power supply cable fixed cleat, 13... (of the power supply cable)
Guide, 14...(Turning side) Center post, 15
...Slewing bearing.

Claims (1)

[Scope of utility model registration request] In a crane in which a swinging trolley is rotatably supported on a traversing trolley or a shift trolley, on the swinging trolley and near the center of swing,
Position the free end of the fixed-side power supply cable support arm extending from the traversing trolley or shift trolley, and position the free end of the swing-side power supply cable support arm provided on the revolving trolley near the center of rotation, and A power supply cable connected to a traversing trolley or a shift trolley and the other end connected to a rotating trolley is supported by both support arms, and a cleat for supporting the power supply cable is provided on both support arms at a distance from the center of rotation. A power supply device for a rotating trolley in a shipboard gantry crane, etc., characterized by the following.