JPH021347Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Related Industrial Field) The present invention relates to a wire rope base attachment structure for a winch drum in a crane or the like.

(Prior Art) In conventional crawler cranes and truck cranes, the end 1a of the wire rope on the drum 2 side of the wire 1 was mostly bent as shown in FIGS. . However, as wire ropes become larger in diameter in the future, it is clear that it will not be easy to attach them using this method since there is a limit to human strength. Therefore, it has become necessary to stop the end of the wire rope without bending it.

(Problems to be solved by the invention) The conventional method of bending the terminal and tightening it with wedges has been improved, and it is easy to assemble and disassemble.
To provide an original structure with high safety during disassembly.

(Solution of the invention) A wedge-shaped space is formed in the winch drum, and the end of the wire rope is fixed within the space by a wedge. The wedge is made up of two members, and the opposing surfaces of both members are provided with concave grooves with arcuate protrusions spaced apart at a predetermined distance to hold the wire rope, and the two members are prevented from slipping from each other. A lock part is provided for this purpose.

(Embodiment of the invention) This will be explained with reference to FIGS. 1 to 7. A wire rope 1 is wound onto a winch drum 2 with one end attached. The winch drum 2 has two members, a male member 2a and a female member 2b, as shown in FIG.
It is made up of The winch drum 2 is constructed by fitting the hollow protrusion 4 of one male member 2a into the cylindrical body 6 of the female member 2b.

As shown in FIG. 4, a wedge-shaped space 7 having a width W and having an inclined top surface 5 is formed in the lower part of the hollow protrusion 4 of the male member 2a in order to fit a wedge 8 into the center thereof. The female member 2b has an opening with a width W at the entrance of the wedge-shaped space 7 into which the wedge is inserted.

A wedge 8 is press-fitted into the wedge-shaped space 7 having the width W.
consists of two members 8a and 8b with a width w, and the member 8
The upper part of the member 8b has the same slope as the end face 5 of the protrusion 4, and the bottom face of the member 8b is a horizontal plane and is in contact with the inner bottom face of the cylindrical body part 6. The mutually opposing parts of both members have the same slope, and grooves 9a and 9b having semicircular cross sections are provided in these parts to face each other. Arc-shaped protrusions 10a, 10b are provided in the grooves 9a, 9b at a predetermined interval and facing each other. Reference numeral 11 denotes a wedge lock projection provided at the end of the recessed groove 9b of the member 8b, projecting upward from both sides of the recessed groove. This prevents the two members of the wedge from shifting.

In the above description, the winch drum is composed of two male and female members, but the base structure of the present invention can of course be applied to an integrated winch drum.

(Function) The wedge 8 is pulled out from the wedge-shaped space 7, and the ends of the wire rope 1 are inserted into the grooves 9a, 9b of the upper and lower members 8a, 8b constituting the wedge 8, which have been appropriately treated to prevent the rope ends from coming apart. Insert it so that the end protrudes slightly beyond the wedge 8. At the same time, the wedge 8 is press-fitted into the wedge-shaped space 7 with the wedge fixing protrusion 11 fitted into the fitting recess 12. Then, the protrusions 10a and 10b bite into the wire rope 1 and are firmly fixed. When tension is applied to the wire rope 1, the wedge 8 further increases its bite due to the pressing force of the wedge 8.
be strongly tightened. Incidentally, since the flanges of the two members 2a and 2b of the winch drum are fixed to the body side, the two members will not be separated from each other.

(Effects of the invention) The end of the wire rope 1 is not bent sharply and remains straight, and the wedge 8 is provided with a protrusion for biting into the rope, making it possible to fix it easily and reliably.

In the conventional method, the diameter of wire rope 1 is up to 30
Up to 32 mm was thought to be the limit for human strength, but with this invention, even objects with a diameter of 32 mm or more can be safely and firmly fixed.

[Brief explanation of the drawing]

Figure 1 is a front view of the winch drum with wire rope set. Figure 2 is a right side view of Figure 1. FIG. 3 is a top view of FIG. 1. FIG. 4 is a sectional view taken along the arrow in FIG. 1. FIG. 5 is an enlarged sectional view of the wedge.
FIG. 6 is a view taken along the arrow in FIG. FIG. 7 is also a sectional view taken along the arrow. FIG. 8 is a sectional view of the conventional original attachment method. FIG. 9 is a view taken along the arrow in FIG. In the figures: 1... wire rope, 2... winch drum, 2a... male member, 2b... female member, 3... wedge (conventional), 4... hollow protrusion (of male member) Part, 5... Sloped top surface (of the lower part of the hollow protrusion), 6... Cylindrical body (of the female member), 7... Wedge-shaped space, 8, 8a, 8b... Wedge, 9a, 9b... Concave groove (semicircular in cross section), 10
a, 10b... arcuate protrusion, 11... wedge fixing protrusion, 12... fitting recess.

Claims (1)

[Scope of utility model registration request] A wedge-shaped space 7 is formed in the winch drum 2, and the end of the wire rope is wedged 8 in the space.
In the original structure of the wire rope, the wedge 8 is fixed by two members 8a and 8b.
arcuate protrusions 10 provided at a predetermined interval on the opposing surfaces of both members for holding wire ropes.
A structure for attaching a wire rope to a winch drum, characterized in that it has concave grooves 9a and 9b having grooves 9a and 10b, and locks 11 and 12 for preventing the two members from coming apart.