JPH05319786A - Winch device - Google Patents

Abstract

PURPOSE:To provide a winch device in which a rope may be prevented from being dislocated from a drum even when the slack of the rope is expanded. CONSTITUTION:A rope dislocation preventing member 23 is arranged while facing drum flanges 25 on both ends of a drum 22 supported to the car body frame 21 of a work machine. One or more rope dislocation preventing members 23 are arranged throughout a range of from a position above the vertical central line Cp of the drum 22 to the retraction direction of the rope. One or more rope dislocation preventing members 23a are arranged closer to the rope pull-out side than the vertical central line Cp of the drum 22 so as to prevent dislocation of a rope when a slack is expanded over the vertical central line Cp toward the rope pull-out side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winch device provided in a crawler crane or a truck crane.

[0002]

2. Description of the Related Art In a winch device used for a crawler crane, a pullout preventing member is provided around the drum in order to prevent the rope wound around the drum from loosening and coming off. 7 and 8 show an example of this type of winch device. The winch device 1 shown in these figures includes a drum 3 horizontally supported by a vehicle body frame 2 of a crawler crane, and a plurality (three in the figure) of derailment prevention members provided on the outer periphery of a winding drum 4 of the drum 3. 5 and is wound around the winding drum 4 in a gap y between the stopper 6 having a length substantially equal to the width of the drum 3 provided at the tip of the unwinding prevention member 5 and the drum flanges 7 at both ends of the winding drum 4. It is set smaller than the diameter of the rope R to prevent the rope R from coming off the winding drum 4. It should be noted that FIG. 8 shows only the stopper 6 of the detachment prevention member 5. Here, in the conventional device 1, the pullout prevention member 5 is provided only on the pull-in side (direction of arrow A) of the rope R from the vertical centerline Cp of the drum 3 extending in the vertical direction of the vehicle body 2. This is based on the empirical rule that when the tension of the rope R is lost, the rope R is loosened exclusively on the retracted side.

[0003]

However, in the apparatus 1 described above, when the drum 3 is erroneously rotated in the direction in which the rope is unwound (the direction of arrow D) while the rope R is loose, as shown in FIG. Furthermore, there is a possibility that the looseness of the rope R may extend from the lowermost stopper 6a beyond the vertical centerline Cp of the drum 3 in the pulling-out direction of the rope R (direction of arrow B) and the rope R may come off. In addition, in a crawler crane in which two types of winch devices 1 are provided for lifting the boom and raising the hook and raising and lowering the hook, when the hoist for raising and lowering the hook is hoisted beyond the limit to cause the boom, the rope R of the boom raising and lowering winch becomes loose and causes the boom. As the amount increases, the slack of the rope R may increase and the rope R may come off on the rope pull-out direction side.

SUMMARY OF THE INVENTION An object of the present invention is to provide a winch device which does not become detached from the drum even if the looseness of the rope is increased.

[0005]

The present invention will be described with reference to FIGS. 1 and 2 showing an embodiment. In the present invention, the drum is supported by a vehicle body 21 of a working machine and around which a rope R is wound. It is applied to a winch device 20 provided with 22 and a pull-out prevention member 23 that prevents the rope R from coming off from the drum 22. And the above-mentioned purpose is the removal prevention member 23a.
Is provided on the pull-out side of the rope R with respect to the vertical center line Cp of the drum 22.

[0006]

In the present invention, the looseness of the rope R is caused by the vertical center line Cp.
When the rope R is expanded beyond the pull-out side of the rope R, the rope R is restrained by the pulling-out prevention member 23a provided on the pull-out side of the rope R with respect to the vertical centerline Cp of the drum 22.

Incidentally, in the section of means and action for solving the above-mentioned problems for explaining the constitution of the present invention, the drawings of the embodiments are used for the sake of easy understanding of the present invention. It is not limited to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the winch device 20 of the present embodiment includes a drum 22 horizontally mounted between vehicle body frames 21 of a crawler crane, and a disconnection preventing member 23 arranged around the drum 22. Is equipped with.

The drum 22 is composed of a cylindrical winding drum 24 around which the rope R is wound, and a disk-shaped drum flange 25 which is coaxial with the winding drum 24 at both ends of the winding drum 24 and projects from the outer periphery thereof. A shaft 26 protruding from the drum flange 25 is supported by a bearing 27 attached to the frame 21,
The drum 22 is rotatable about its axis. One end of the shaft 26 is connected to a drive source such as a hydraulic motor (not shown), and the drum 22 is rotationally driven by this drive source.
In FIG. 2, the rope R is simplified and drawn by a line, but actually it has a thickness corresponding to the strength of use.

As shown in more detail in FIGS. 3 and 4,
The anti-stranding member 23 includes a substrate 30 having a substantially rectangular shape and a guide plate 31 having a substantially triangular shape that is erected by welding or the like at the center position in the width direction. This removal prevention member 2
3 is such that the tip of the guide plate 31 faces the outer peripheral surface 25a of the drum flange 25 with a desired gap y, and the slope 34 of the guide plate 31 has a downward slope toward the winding drum 24. After being arranged, it is attached to the frame 21 by being fastened with four bolts 33 which are inserted into the attachment long holes 32 formed in the substrate 30.

The unplugging prevention member 23 has a long hole 32 for attachment thereof.
Is attached to the frame 21 in such a direction as to extend in the radial direction of the drum 22. Therefore, it is possible to adjust the position of the drum 22 in the radial direction, and the gap y between the detachment prevention member 23 and the outer peripheral surface 25a of the drum flange 25 can be easily adjusted. This makes it possible to prevent the passage of the rope R by making the gap y smaller than the diameter of the rope R.

As shown in FIGS. 1 and 2, the pulling-out preventing members 23 are arranged independently of each other on the outer circumferences of the left and right drum flanges 25, and are arranged on the outer circumferences of the respective drum flanges 25.
A total of six pieces are attached to the drum 22 at appropriate intervals in the circumferential direction. Of the respective anti-cord wires 23, the anti-cord member 23a provided on the front side of the vehicle body frame 2 (on the right side in FIG. 2) is a vertical center line Cp of the drum 22 extending in the vertical direction of the vehicle body frame 2. Is attached to the pull-out side of the rope R (in the direction of arrow B in FIG. 2).

In the winch device 20 having the above-described structure, when the rope R is loosened and comes off the drum flange 25a, the rope R is placed on the slope 34 of the pullout preventing member 23 as shown by a two-dot chain line R _O in FIG. Ride up. Then, when the tension of the rope R is recovered, the rope R slides down on the slope 34 and returns to the winding drum 24, so that the rope R does not come off the drum 22 and fall into an unrecoverable state. Moreover, the drum 22
Since the pullout preventing member 23a is provided on the rope pull-out side of the vertical centerline Cp of the drum 22, the drum 22 rotates in the rope payout direction (direction of arrow D in FIG. 2) while the rope R is loosened, or the hook is pulled. Even if the looseness of the rope R expands toward the rope pull-out side due to the boom being raised by the lifting winch, the rope R is always returned to the drum 22.

In the present embodiment, since the stripping prevention members 23 are provided on the outer periphery of the drum flange 25 independently of each other, the gap y can be adjusted individually, whereby the work of mounting the stripping prevention member 23 can be performed. Will be easier. By the way, in the conventional example of FIG. 7, it is necessary to position the pullout preventing member 5 so that the gap y between the single stopper 6 and the left and right drum flanges 7 becomes smaller than the diameter of the rope R at the same time. It is troublesome. Further, in the conventional example, machining of the outer periphery of the drum flange 7 is indispensable for aligning the left and right gaps y, but in the present embodiment, the left and right detachment prevention members 23 can be adjusted separately, so that the left and right due to casting errors or the like. Even if the diameter of the drum flange 25 is significantly different, no additional work is required.

It should be noted that the number of the pull-out preventing members 23 shown in the embodiment is merely an example, and may be appropriately changed according to the diameter of the drum flange 25 and the like. Further, in the embodiment, the guide plate 31 of the pullout prevention member 23 is formed in a triangular shape, but the present invention is not limited to this, and for example, a pipe material may be attached while being inclined like the slope 34.

Since the gist of the present invention is that the unguiding member is provided on the rope pull-out side of the vertical centerline Cp, the conventional unguiding member 5 shown in FIG. Needless to say, it may be arranged on the rope withdrawing direction side from the vertical center line Cp of 22. Also,
In the case of using the detachment prevention member 5 of FIG. 7, as shown in FIG. 5, the end surface of the stopper 6 and the side surface of the drum flange 7 are opposed to each other so that the respective gaps x are set smaller than the diameter of the rope R, or As shown in FIG. 6, the diameter of the drum flange 7 is changed between the left and right, and the gap x between one end of the stopper 6 and the side surface of the drum flange 7 and the gap y between the outer periphery of the other end of the stopper 6 and the outer periphery of the drum flange 7 are roped. It may be set smaller than the diameter of R.

[0017]

As described above, according to the present invention, the cable pull-out prevention member is arranged on the rope pull-out side with respect to the vertical centerline of the drum. Therefore, even if the looseness of the rope expands, the cable is detached from the drum. The excellent effect that there is no fear is obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a winch device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged view of one of the detachment prevention members shown in FIG.

FIG. 4 is a view showing a state in which the detachment prevention member of FIG. 3 is viewed from the IV direction in FIG.

FIG. 5 is a plan view showing another example of the detachment prevention member.

FIG. 6 is a plan view showing still another example of the pullout prevention member.

FIG. 7 is a plan view showing an example of a conventional winch device.

8 is a cross-sectional view taken along the line VIII-VIII of FIG.

9 is a diagram showing a state in which the looseness of the rope is larger than that in the state shown in FIG.

[Explanation of symbols]

 5,23 Detachment prevention member 20 Winch device 21 Body frame 22 Drum Cp Drum vertical centerline R rope

Claims (1)

[Claims] 1. A winch device comprising a drum supported on a vehicle body of a working machine, around which a rope is wound, and a pullout preventing member for preventing the rope from coming off the drum. A winch device, wherein a prevention member is provided on a pull-out side of the rope with respect to a vertical centerline of the drum.