JPH10258990A - Wire rope end coupler for mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate any necessity of attaching a reinforcing material dedicated to a bracket by extending a top boss metal provided in another side board out of top boss metals to the inside of the other side board and attaching a bracket for coupling the end of a wire rope with the outer circumference of the extended part. SOLUTION: A top boss metal 51 provided to another side board 4' out of top boss metals is extended inside the other side board 4' so as to be fixed to the other side board 4' by welding, etc. A bracket 53 or a metal in a goose neck part 3 side for coupling the end 32 of a wire rope 31 is fixed to the outer circumference of the extended part 52 of the top boss metal 51 by welding, etc. A rope socket 33 wedged by the rope end 32 is coupled with the bracket 53 attached to the top boss metal 51 and, after the wire rope 31 from a winch in the base side of the crane boom 1 is made to pass through the top end of a pulley 7, it is wound around a plurality of bottom end pulleys 10 and the hook block pulley 22 so as to couple the rope end 32 to the goose neck part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope cable end connecting device used for a mobile crane.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a mobile crane is provided with a gooseneck portion 3 at a tip 2 of a crane boom 1, and the gooseneck portion 3 has left and right side plates 4, 4 '.
It has. Upper portions (upper portions) 4a, 4a 'of the left and right side plates 4, 4' are provided with upper boss fittings 5, 5, respectively. Supported by the left and right side plates 4,
The upper support shaft 6 is bridged between 4 '. This upper support shaft 6
Is provided with an upper tip pulley 7 rotatably supported so as to be located at a position close to one of the left and right side plates 4, 4 '. Further, lower portions (lower side plates) 4b of the left and right side plates 4, 4 'of the gooseneck portion 3,
4b 'is provided with lower boss fittings 8, 8 provided on each of them, and both ends of the lower boss fittings 8, 8 are supported by the lower boss fittings 8, 8 to support lower support between the left and right side plates 4, 4'. The shaft 9 is bridged. The lower support shaft 9 is provided with a plurality of lower end pulleys 10, 10, 10 rotatably supported. Further, the hook block 21 includes a plurality of hook block pulleys 22, 22, 22 rotatably supported.

[0003] The mobile crane uses a wire rope 31 from a winch A (not shown) provided on the base end side of the crane boom 1 and passes a plurality of lower tip pulleys 10 after passing the upper tip pulley 7. , 10,10 and multiple hook block pulleys
The hook block 21 is suspended from the tip 2 of the crane boom 1 by hanging around the 22, 22, 22 and connecting the cable end 32, which is the tip of the wire rope 31, to the gooseneck 3. doing.

The cable end 32 is wedged to a rope socket 33, and the cable end 32 is connected to the gooseneck 3 by connecting the rope socket 33 to a pin 35 attached to the other side plate 4 '. . And the pin of the other side plate 4 '
A reinforcing member 34 for ensuring strength is provided in the 35 mounting portion.

[0005] The reinforcing member 34 is used to reinforce the other side plate 4 ′ provided only for connecting the cable end 32 to the gooseneck portion 3.

Further, a wire guard 41 is provided at a connection portion 11 between the gooseneck portion 3 and the tip end 2 of the crane boom 1. This wire guard 41 prevents the wire rope 31 from hitting the corner of the gooseneck 3 and being damaged when the crane boom 1 is raised and as shown in FIG.
It is provided.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire rope cable end connecting device in which a reinforcing member of a side plate dedicated to the wire rope cable end connecting device of the conventional wire rope cable end connecting device is eliminated. Is to do.

[0005]

The upper boss fitting provided on the other side plate of the upper boss fitting extends inside the other side plate, and a wire end of a wire rope is attached to the outer periphery of the extension. Since the connecting bracket was attached, there was no need to attach a special reinforcing material for the bracket.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wire rope cable end connecting device according to the present invention has upper bosses provided respectively on upper portions of left and right side plates of a goose neck at the tip of a crane boom, and both ends thereof are supported by the upper bosses. An upper support shaft bridged between the left and right side plates, an upper tip pulley rotatably supported by the upper support shaft so as to be located at a position close to one of the left and right side plates, and a gooseneck. Lower boss fittings respectively provided at the lower portions of the left and right side plates of the portion, a lower support shaft bridged between the left and right side plates with both ends supported by the lower boss fittings, and rotatable on the lower support shaft A plurality of lower end pulleys supported on the crane boom and a hook block having a plurality of rotatably supported hook block pulleys. After passing the upper tip pulley, the hook is hung between the plurality of lower tip pulleys and the plurality of hook block pulleys, and a cable end, which is the tip, is connected to the gooseneck part, In a mobile crane configured to suspend a hook block from the tip of a crane boom, the upper boss fitting provided on the other side plate of the upper boss fitting is extended inside the other side plate, and this extension is performed. A bracket for connecting the rope end of the wire rope was attached to the outer periphery of the protrusion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wire rope cable end connecting device for a mobile crane according to the present invention will be described below with reference to FIGS.

Since the wire rope cable end connecting device of the mobile crane according to the present invention is different from the conventional one only in the connecting portion of the cable end to the gooseneck portion, other structures and operations are described above. What is used in the description of the conventional technique is omitted and the description is omitted.

Reference numeral 51 denotes an upper boss fitting provided on the other side plate 4 'of the upper boss fitting. The upper boss fitting 51 extends inside the other side plate 4 'and is fixed to the other side plate 4' by welding or the like. 52 is an extension of the upper boss fitting 51, and 53 is
It is a bracket. The bracket 53 is a metal fitting on the gooseneck portion 3 side that connects the cable ends 32 of the wire rope 31 and is fixed to the outer periphery of the extension portion 52 by welding or the like.

The wire rope cable end connecting device of the mobile crane according to the present invention having the above-described structure is constructed by connecting the rope socket 33 having the cable end 32 wedged to the bracket 53 attached to the upper boss fitting 51. After passing the wire rope 31 from the winch A provided on the base end side of the crane boom 1 through the upper tip pulley 7, a plurality of lower tip pulleys 10, 10, 10 and a plurality of hook block pulleys 22, 22, 22 The hook block 21 is suspended from the tip 2 of the crane boom 1 because the cable end 32 can be connected to the gooseneck portion 3. By driving the winch A up and down, the load suspended on the hook block 21 can be lifted and moved.

The portion of the other side plate upper portion 4a 'where the upper boss fitting 51 is attached and the upper boss fitting 51 originally have sufficient strength to support the upper support shaft 6 which receives the load of the upper tip pulley 7. Therefore, there is no need to add a reinforcing material when attaching the bracket 53 to the upper boss fitting 51.

In the above description, the upper tip pulley 7 and the hook block pulley 22 are each described as having three pieces. However, the present invention can be applied to two pieces or four or more pieces. It is.

If the wire guard 61 is provided with a guard plate 62 for restricting the movement of the wire rope 31 in the axial direction of the lower support shaft 9, the wire guard 61 is formed between the wire rope 31 and the adjacent lower tip pulley 10. Since the contact is cut off, the wire rope 31 and the lower tip pulley 10 can be arranged close to each other in the axial direction of the lower tip pulley 10. By doing so, the twist of the hook block 21 with respect to the gooseneck portion 3 (twist of the distance between adjacent pulleys of the lower tip pulley 10) can be reduced, and the gooseneck portion 3 can be reduced.
Can be reduced in width.

[0017]

According to the wire crane cable end connecting device of the mobile crane of the present invention configured as described above, when connecting the cable end to the gooseneck portion, the upper boss provided on the other side plate of the upper boss metal fittings. Since the metal fitting is extended inside the other side plate and a bracket for connecting the cable end of the wire rope is attached to the outer periphery of the extending part, it is not necessary to add a new reinforcing material, and a simple configuration is possible. It could do its job.

[Brief description of the drawings]

FIG. 1 is a side view of a wire rope cable end connecting device of a mobile crane according to the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a side view of a conventional wire rope cable end connecting device of a mobile crane.

4 is a plan view of FIG. 3; FIG.

FIG. 5 is an explanatory view showing the operation state of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane boom 3 Gooseneck part 4a, 4a 'Upper part of side plate 5, 51 Upper boss fitting 52 Extension part 32 Cable end 31 Wire rope 53 Bracket A winch

Claims (1)

[Claims] An upper boss fitting provided on an upper portion of a left and right side plate of a goose neck portion at a tip of a crane boom;
The upper boss is supported at both ends by an upper support shaft bridged between the left and right side plates, and is rotated by the upper support shaft so as to be located at a position close to one of the left and right side plates. An upper end pulley freely supported, a lower boss fitting provided at a lower portion of the left and right side plates of the gooseneck portion, and a lower portion supported at both ends by the lower boss fitting and bridged between the left and right side plates. A support shaft, a plurality of lower end pulleys rotatably supported by the lower support shaft, and a hook block having a plurality of hook block pulleys rotatably supported, provided on a base end side of the crane boom. After passing a wire rope from a winch through the upper tip pulley, the wire rope is hung between the plurality of lower tip pulleys and the plurality of hook block pulleys, and a cable end which is a tip end thereof is a goose. In a mobile crane configured to suspend a hook block from a crane boom tip by being connected to a neck portion, the upper boss fitting provided on the other side plate of the upper boss fitting is provided inside the other side plate. And a bracket for connecting a cable end of the wire rope is attached to an outer periphery of the extending portion.