JP3062587B2 - Winding machine rope tightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope tightening device for a winding drum, which inserts a terminal portion of a rope wound around the outer periphery of the cotter together with a cotter into a cotter insertion hole provided in the winding drum and tightens the rope by a wedge action. .

[0002]

2. Description of the Related Art FIG. 5 shows an example of a mobile crane, and a revolving superstructure 2 is mounted on a traveling body 1 of an endless track type so as to be freely rotatable. A winding drum 3 for winding and a winding drum 4 for raising and lowering are installed on the revolving superstructure 2, and a jib 5 is attached to a front portion of the revolving superstructure 2 so that the jib 5 can be raised and lowered. Winding drum 3
The unraveled rope 6 is suspended via a sheave attached to the tip of the jib 5, hung around the sheave of the hook 7, and fastened to the tip of the jib 5. Rope 6
By lifting and lowering the hook 7, the hook 7 is moved up and down for cargo handling.

Next, a conventional rope tightening device for tightening the rope 6 to the winding drum 3 will be described with reference to FIGS.

[0004] The body of the winding cylinder 3 on the end face side of the flange 3f includes:
A cotter insertion hole 3a having a slope 3b is provided. The rope 6 is tightened via the cotter 7 as follows. That is, a terminal portion of the rope is wound around the outer periphery of the cotter 7 such that the terminal portion is on the side of the slope 3b , and both are inserted from the entrance 3c of the cotter insertion hole 3a to the exit 3d side, and the rope is inserted. When tension is applied to 6, tightening is achieved by a wedge effect. The best tightening state is as shown in FIGS. 6, 7, 11, and 12, in which the end portion of the rope 6 completely contacts the outer periphery of the cotter 7 and the tip 6 of the end portion.
a is in a position where it does not protrude from the outlet 3d of the insertion hole 3a.

[0005]

However, when the length of the end of the rope 6 protruding from the tip of the cotter 7 is set to be short, the tension in the direction of the arrow T causes the friction between the cotter 7 and the rope 6 to increase. It becomes larger than the resistance, as shown in FIG.
The end 6a of the terminal portion of the rope 6 may be in an incomplete fastening state in which the end 6a does not reach the end of the cotter 7. In this state,
A sufficient wedge effect cannot be obtained, and the rope 6 may come off. When the X dimension is set to be long and the rope 6 is incorporated, or when the tension for pulling the rope 6 is weak, the tip 6a of the end portion of the rope 6 is inserted into the insertion hole 3a as shown in FIGS. The rope 6 that protrudes from the exit 3d and is subsequently wound around the winding drum 3 rides on the protruding portion of the rope terminal, so that the winding property is deteriorated and the rope may be damaged.

The tightness of the end of the rope 6 depends on the tension applied in the direction of the arrow and the length X of the tip 6a of the rope 6 protruding from the tip of the cotter 7. The place to rely on is big. Therefore, tightening work is difficult work for unskilled people.

Further, once the rope 6 is wound around the cotter 7, passed through the insertion hole 3 a and tension is applied to the rope 6, and if the state shown in FIG. Even if is removed from the insertion hole 3a, even if the rope 6 has a bending habit of the shape of the cotter 7 and the X dimension is lengthened or shortened and reassembled,
The cotter 7 moves to the bending habit position of the rope 6 and cannot be easily assembled in a normal state. In the worst case, the bending of the habit of the rope 6 must be corrected or cut out and re-installed.

The present invention has been made in view of the above, and provides a tightening device capable of easily tightening a terminal portion of a rope into a cotter insertion hole of a bobbin through a coater in a proper state. With the goal.

[0009]

SUMMARY OF THE INVENTION A rope tightening device for a winding drum according to the present invention is provided at an outlet of a cotter insertion hole provided in the winding drum.
A protrusion is provided on the extension of the slope surface to control the protrusion of the tip of the end of the rope wound around the cotter.

[0010]

With the projection provided at the exit of the cotter insertion hole, the tip of the end of the rope wound around the cotter is prevented from protruding from the exit, and the rope can be easily tightened properly.

[0011]

1 to 4 show an embodiment of the present invention.
This will be described below. In these figures, FIGS. 6 to 1
The same or corresponding elements as those in 2 are denoted by the same reference numerals.

[0012] put to the exit 3d part of the cotter insertion hole 3a
On the extension of the inclined surface 3b, there is provided a projection 3e for stopping the tip 6a of the end of the rope 6 wound around the outer periphery of the cotter 7. Others are the same as the conventional one described above.

As shown in FIG. 3, the length of the end portion of the rope 6 wound around the outer periphery of the cotter 7 is set to be longer than the length X protruding from the tip of the cotter 7. By inserting into the insertion hole 3a and applying tension in the direction of the arrow, the tip 6a of the end of the rope 6
Does not protrude from the outlet 3d any more, and the end of the rope 6 is securely tightened to the proper position by the wedge effect via the cotter 7.

In this embodiment, the projection 3e is formed integrally with the winding drum 3. However, the projection may be fixed to the outlet 3d by a bolt. It may be. Although the embodiment has been described with reference to the winding drum 3, the same applies to the winding drum 4 for raising and lowering or a winding drum additionally provided.

[0015]

According to the present invention described above, the terminal portion of the rope can be easily tightened in a good state without depending on the experience and intuition of the worker. As a result, it is possible to prevent a failure in assembling the rope, and to remove the rope from the cotter during the crane operation and to correct or cut the rope.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention;

FIG. 2 is a cross-sectional side view taken along line AA of FIG. 1;

FIG. 3 is a plan view for explaining insertion of a rope terminal unit and a cotter in FIG. 1;

4 is a sectional side view of FIG. 3 corresponding to FIG. 2;

FIG. 5 is a side view showing an example of a mobile crane;

FIG. 6 is a plan view showing a conventional rope tightening device for a winding drum;

7 is a sectional side view of FIG. 6 corresponding to FIG. 2;

8 is a plan view for explaining insertion of a rope terminal and a cotter in FIG. 6,

9 is a plan view showing a state in which the tip of the terminal portion of the rope in FIG. 6 projects from the outlet of the cotter insertion hole,

10 is a sectional side view of FIG. 9 corresponding to FIG. 7,

11 is a plan view showing a state in which a rope is wound around the winding drum of FIG. 6 a plurality of times;

FIG. 12 is a sectional side view of FIG. 11 corresponding to FIG. 7;

[Explanation of symbols]

 Reference Signs List 3 winding drum 3a cotter insertion hole 3b slope 3c entrance 3d exit 3e projection 3f flange 6 rope 6a tip 7 cotter

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66D 1/34 B66D 1/30 B65H 75/28

Claims (1)

(57) [Claims] 1. A cotter insertion hole having a slope surface is provided in a body portion on a flange end surface side of a winding drum, and the terminal portion of a rope wound around an outer periphery of the cotter is on the slope surface side.
In rope fastening device winding drum for tightening the ropes by plugged into the outlet side from the inlet of the cotter insertion hole with cotter rope, the inclined surface of the rope insertion hole exit section
A rope tightening device, wherein a projection is provided on the extension to prevent the tip of the rope end from projecting.