JPH0413002Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a detachable handle for operating a hoisting machine with a brake device.

(Prior Art) In a conventional detachable handle for operating a hoist, a handle plate and a shaft are integrated by welding or the like.

(Problem to be solved by the present invention) For this reason, when the hoisting machine is operated by the handle, for example, when the hoisting machine is used to stretch a net for volleyball, etc., the net is often stretched too much. was. At this time, there was a risk that the hoisting machine would be overloaded and the brake of the hoisting machine would become stuck, making it impossible to rotate the hoisting machine in the release direction.

(Means for solving the problem) Therefore, the present invention solves the above-mentioned conventional problems by disabling the handle operation in the hoisting direction when an overload is applied to the hoisting machine, and also makes it possible to properly tension the net. A torque handle that allows the hoist to be rotated in the release direction even if the rope of the hoist is tightened due to a strong ball hitting the net and a load exceeding a set value is applied to the hoist. The purpose is to provide the following.

To this end, in the present invention, the torque handle has a ring fitted near the tip of the shaft of a removable handle that operates the hoist, and a plurality of disc springs are loosely fitted to the rear side of the ring, and A clutch that acts in the release direction on the rear side of the disc spring and the base end of the handle plate are rotatably and slidably fitted in the axial direction, and the ring, the handle, and the clutch are connected to the rear end of the shaft. Adjust the spacing of
The desired purpose can be achieved by screwing together an adjustment nut that adjusts the pressing force of the disc spring to obtain a predetermined amount of load.

(Example) a is a torque handle consisting of a shaft 11 and a handle plate 12;
The tip end 11a of 1 is a square fitting hole 31a formed at the edge of the rotating shaft 31 of the hoisting machine b with a brake device.
It is formed into a rectangular shape similar to the fitting hole 31a so that it can be attached and detached and the rotating shaft 31 can be rotated. A handle plate 12 is disposed approximately in the center of the shaft 11 via a hub 13.
A roller clutch 14 is fitted between the hub 13 and the shaft 11 so that the base end thereof is rotatable and slidable in the axial direction. is interposed.
Further, the hub 13 has a tip 11 of the shaft 11.
A recess 13a opening on the a side is formed, and the recess 1
A plurality of disc springs 15 loosely fitted to the shaft 11 are mounted inside the shaft 11, and the disc springs 15 are locked by a ring 16 fitted near the tip 11a of the shaft 11. 17 is a thrust washer interposed between the disc spring 15 and the bottom surface of the recess 13a of the hub 13.

A male screw 11b is carved into the rear end of the shaft 11, and the male screw 11b is used to adjust the distance between the bottom surface of the recess 13a of the hub 13 and the ring 16, and adjust the pressing force of the disc spring 15. Adjustment nut 18
are screwed together. Numeral 19 is a nut cover fitted near the rear end of the shaft 11 so as to be slidable in the axial direction, and 20 is a thrust washer interposed between the nut cover 19 and the hub 13.

A rotary operating shaft 21 is attached to the tip of the handle plate 12 in a perpendicular direction with a nut 22, and a handshake 23 is rotatably attached to the rotating operating shaft 21.

32 is the drum of the hoist b, 31b and 32b are rope hanging holes drilled in the rotating shaft 31 and the drum 32, 33 is the case, and 34 is the shaft hole 33 of the case 33.
This is a support ring fitted to a.

(Function) The pressing force of the disc spring 15 is adjusted with the adjustment nut 18, and the load amount of the torque handle a is set to a desired value.As a result, the shaft 11 and the handle plate 12 are integrated. Become.

Now, when hoisting machine b is rotated in the hoisting direction using the torque handle a, the load is small at first, so the hoisting operation can be performed, but when the load on hoisting machine b exceeds the desired value, the roller clutch 14 is free in the winding direction, so only the handle plate 12 resists the pressing force of the disc spring 15.
3, rotates while slipping, and shaft 11
will no longer rotate. Therefore, the hoisting operation of the hoist b becomes impossible, and excessive hoisting can be prevented.

In addition, when the hoist B is used to stretch a net for volleyball, etc., even if the net is tensioned at an appropriate tension, the rope of the hoist will tighten every time a strong ball hits the net, causing a load on the hoist. Even if the overload exceeds the desired value, the roller clutch 14 acts in the releasing direction, so even if the pressing force of the disc spring 15 does not work, the roller clutch 14 will continue to operate until the load falls below the desired value. It can be canceled.

(Other Embodiments) In this embodiment, the clutch is connected to a pair of cams 27 and 28.
One cam 27 is fitted to the base end of the handle plate 12, and is rotatably and slidably fitted to the shaft 11. Further, the other cam 28 is located on the rear side of the one cam 27 and is connected to the shaft 1.
1 so as to be slidable in the axial direction. The clutch 26 is formed with stepped portions 27a and 28a that engage at right angles to the rotation in the releasing direction so that the clutch 26 acts in the releasing direction, and in the winding direction, the clutch 26 is formed with stepped portions 27a and 28a that are raised up when overloaded. 27b, 28 such that a gap 29 is formed between them.
8b is formed. 30 is the other cam 2
8 and the adjusting nut 18.

(Function) According to this embodiment, when there is an overload during hoisting,
Since a gap is formed between the cams 27 and 28,
It can be visually confirmed that the hoisting machine b is overloaded. Therefore, it is sufficient to stop the winding operation at this point.

(Effects of the present invention) As described above, according to the present invention, the handle for operating the hoist is equipped with a disc spring whose pressing force can be adjusted using an adjustment nut, and a disc spring that acts in the release direction, and when overloaded in the hoisting direction. Since the torque handle is equipped with a clutch that creates a slip or gap,
It was possible to prevent the hoist from hoisting too much. Therefore, the phenomenon of the brake of the hoisting machine being stuck can be eliminated, the release operation will not be affected, and the net etc. can be tensioned with appropriate tension.

Furthermore, according to the present invention, even if the rope is tightened after hoisting and an overload is applied to the hoist, the clutch still acts in the release direction, so the release operation can be performed even if no pressing force is applied to the disc spring. can do.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view showing a torque handle according to the present invention, and FIG. 2 is a partially cutaway side view of the torque handle showing another embodiment. a is a torque handle, 11 is a shaft, 12 is a handle plate, 14 is a roller clutch, 15
is a disc spring, 16 is a ring, 18 is an adjustment nut, 2
6 is a cam type clutch, 27 and 28 are cams, 27
a, 28a are stepped portions, 27b, 28b are inclined portions, b
is a winding machine.

Claims (1)

[Claims for Utility Model Registration] 1. A ring is fitted near the tip of the shaft of a removable handle for operating a hoisting machine, and a plurality of disc springs are loosely fitted to the rear side of the ring, and A clutch that acts in the release direction on the rear side of the disc spring and the base end of the handle plate are rotatably and slidably fitted in the axial direction, and the ring, the handle, and the clutch are connected to the rear end of the shaft. A torque handle for a hoisting machine with a brake device, characterized in that an adjustment nut for adjusting the spacing and the pressing force of the disc spring is screwed together to obtain a predetermined load amount. 2. The brake device according to claim 1, wherein the clutch is a roller clutch that slips in the hoisting direction against the pressing force of a disc spring when the hoist is overloaded. Torque handle on hoisting machine. 3. The brake according to claim 1, wherein the clutch is a cam type clutch in which a gap is formed against the pressing force of a disc spring when the hoist is overloaded. Torque handle on hoisting machine with device.