JPS6033758B2 - Hook rope release prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hook rope retaining device that prevents a hanging tub rope from coming off from a hook constituting a hanging tool.

A conventional hook rope retaining device is one in which the hook is tilted and rotatable to facilitate hook work, and the hook is equipped with a retainer that opens and closes the closing part of the hook by swinging motion. There is.

According to this locking device, since the locking device tilts or rotates together with the hook, the locking mechanism is not damaged in any way by the movement of the hook.

However, the work of hooking and unhooking the load rope to the hook must be done manually while operating the stopper. Therefore, it has the disadvantage that it cannot be operated when it is used on large objects or in places where workers cannot get close to it, and in this case, it is generally not equipped with a stopper. SUMMARY OF THE INVENTION An object of the present invention is to provide a retaining device that can follow the rotation and inclination of a hook and can prevent interference of an operating rope with a hoisting rope. An embodiment of the present invention is shown below in Figures 1 and 2.
This will be explained based on FIGS.

As shown in FIGS. 1 and 2, the hanging tool according to this embodiment connects a thief flock and a hook block with a side plate 2, and is suspended by a hoisting rope hung on the thief flock.

The thief flock consists of four rope sheeps 3 rotatably attached in parallel to a common support shaft 4. Both ends of this support shaft 4 are attached to the upper side of the side plate 2. On the other hand, the hook flock consists of a trunnion 5 and a hook 8 that passes through the center of the trunnion 5 and is rotatably assembled. A nut 7 is fitted to the upper end of the hook 8, and a nut 7 is fitted between the nut 7 and the trunnion 5. A thrust bearing 6 is provided so that the hook 8 rotates smoothly. The shaft portions at both ends of the trunnion 5 are rotatably attached to the lower side of the side plate 2, allowing the hook 8 to tilt around the trunnion 5. The rotation and tilting functions of the hook 8 thus obtained facilitate the hooking operation. As shown in FIG. 1, the locking device provided on this hanging tool includes a locking lever 14 bent in an L shape, a rod 12 for hooking the locking lever 14, and an operation for operating the rod 12 from a distance. The main component is rope 9.

The retaining lever 14 is attached with a pin to a lever hanger 13 whose bent portion is fixed to the shaft portion of the hook 8 so as to be freely rotatable up and down. In this case, the locking lever i
4, the center of gravity is located to the left of the center of rotation in FIG. 1, so that the locking lever 14 always rotates in the direction of closing the opening of the hook 8 due to its own weight.
As shown in FIGS. 1 and 2, the lever 14 is hooked onto the two rods 12 on the heavy D side.
3. It is slidably passed through the trunnion 5 and the nut 7 and is projected above the nut 7. In this case, the trunnion 5 is provided with a space in which the rod 12 can rotate around the shaft of the hook 8. Therefore, the hook 8 has, in its upper part,
It is supported by the trunnion 5 via the nut 7 and the thrust bearing 6. On the other hand, the two rods 12 that protrude above the nut 7 in a freely movable manner have their protruding ends joined with a joint material 23, and a universal joint 11 with a spherical seat is applied to this joint material 23.
is connected to the lower end of the guide plate 10.

This guide plate is provided with long elongated holes above and below, and the center portion of the support shaft 4 of the Thief Flock is slidably housed within this elongated recess. One end of the operating rope 9 is connected to the upper end of the guide plate 10. On the other hand, as shown in FIG. 3, the hoisting rope 1 passes around several times between the trolley sheep 33 supported by the horizontally running trolley 31 and the rope sheave 3 of the thief float, and is finally connected to the hoisting device 32 on the trolley 31. Ru. In this way, the hoisting device 32
When the hoisting rope 1 is operated up and down, the entire hanging tool is raised and lowered, and the hook 8 is moved up and down. When the trolley 31 travels, the hook 8 moves horizontally. The aforementioned operating rope 9 is guided from the guide plate 10 toward the upper trolley 31 and is wound around the rope winding drum 34 on the trolley 31. This rope winding drum 34 is driven by a drum drive motor 35 installed on the trolley and equipped with two stages of high and low torque.
Rotationally driven by. Due to the low torque of the motor 35, the operating lobe 9 is always kept under tension, thereby preventing the operating rope 9 from becoming sagged with the hoisting rope 1 and the like. In this way, the operating rope 9 and the hoisting rope 1 hang down from the trolley 31 and move together as the trolley 31 travels. In this embodiment with the above configuration, when hanging the hanging drop rope on the hook 8, the following procedure is performed.

First, the drum drive motor 35 on the trolley 31 is switched to the high torque side, the rope winding drum 34 is rotated to wind up the operating lobe 9, and the guide plate rises to 0'.
For this reason, the rod 12 connected to the guide plate 1
The lever 14 rises with the retaining lever 14 hooked. Therefore, the retaining lever 14 is rotated to the position indicated by the two-dot chain line in FIG. If so, the rope winding drum 34 is reversed by switching the drum drive motor 35 to the low torque side or by reversing the motor 35. In this way, the operating rope 9 is let out from the rope winding drum 34 and loosened. Therefore, the rod 12 and the guide plate 1 are lowered by their own weight, and the locking lever 14 naturally rotates to the solid line position shown in FIGS. 1 and 2, suspending the closing part of the hook 8. Tighten the load rope so that it does not come off. To remove the load rope from the hook 8, follow the procedure in reverse.

In either case, when the hook 8 rotates via the thrust bearing 6 and changes its direction, the rod 12 is applied to the nut 7 that is attached integrally with the hook 8, and the rod 12 also connects to the universal joint 11.
The function rotates following the hook 8.

Therefore, there is no loss of the retaining function. In addition, since the guide plate 10 and the rod 12 are connected via the universal joint 11, even if the rod 12 is spread around, excessive force such as rotational force is generated on the guide plate 10 and the operating rope 9 connected to the upper part of the guide plate 10. do not have. Also, hook 8 is trunnion 5
Even if the rod 12 is tilted slightly about the axis, the rod 12 will follow the tilt, so the retaining function will not be impaired in any way. At this time, the tilting force of the hook 8 is absorbed by the universal joint 11, and no undue force is generated on the guide plate 101. Further, the operating rope 9 is connected to the rod 1 via the guide plate 10.
2, it is possible to prevent accidents such as interference between the operating rope 9 and the sheave block, and a reliable operation to prevent the sheave block from coming off is possible.

As described above, according to the present invention, a vertically movable guide plate is attached to the sheave shaft, and the operating rope is connected to this, without directly connecting the operating rope to the rod engaged with the locking lever. , it is possible to prevent accidents caused by interference with the sheave.

In addition, the drive motor of the drum that winds the operating rope can be adjusted to two heights.
Since the rope has a torque of 100 degrees, the operating rope does not slacken, and it is possible to prevent entanglement with the hoisting rope.

[Brief explanation of drawings]

Fig. 1 is a front view of a hanging device equipped with a detachment prevention device according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is an overall schematic diagram showing the hanging device of Fig. 1 suspended from a trolley. It is a diagram. 1...Hoisting lobe, 2...Side plate, 3.
...Rope sheave, 4...Support shaft, 5.
...trunnion, 6. ．．・...Thrust bearing, 7...
... Nut, 8 ... Hook, 9 ... Operation rope, 10 ... Guide plate, 11 ...
・Universal joint, 12...Rod, 13...
・Lever hanger t 14...Removal prevention lever, 3
1... Trolley, 32... Hoisting device, 33... Trolley sheave, 314... Rope winding drum, 35
...Drum drive motor. O figure juice 2 figure N o 3 figure

Claims (1)

[Claims] 1. A hanging device comprising a hook block with a freely rotatable hook, a sheave block for suspending the hook block from a hoisting rope, and a lever on the hook to prevent the rope from coming off, which closes under its own weight. The guide plate is slidably attached to the support shaft of the sheave block through a long elongated hole, the rod engaged with the locking lever is connected to the lower end of the guide plate via a universal joint, and the operating rope is attached to the upper end of the guide plate. A drum that winds the operating rope is connected to the drum, and a motor that rotates with at least two levels of torque, high and low, is attached to this drum.The low torque is set below the value that takes up the slack in the operating rope, and the high torque is set to prevent it from coming off. A device for preventing the rope from coming off the hook, characterized in that the lever is pulled up more than the value.