JPH0788656B2 - Lifting device for water control door - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a water control door body lifting device installed in a waterway or the like, and when the door body is being lifted, the door body is pulled up. The handle is designed to prevent it from rotating in the reverse direction.

(Background of the Invention) Doors that have fallen or dropped on the riverbed are often lifted by manually rotating the handle, but since the weight of this type of door is generally heavy, the load applied to the handle Is also quite large. Therefore, if the handle suddenly reverses in the direction in which the door falls and falls due to the load during operation of the handle, there is a possibility that the hand holding the handle may be seriously injured.

(Object of the Invention) The present invention has been made in view of the above circumstances, and the handle does not reversely rotate during operation of the handle for pulling up the door body, and the handle can be safely and safely handled and operated. The purpose is to provide a device.

(Summary of the Invention) The present invention relates to a water control door body, a transmission wheel connected to the door body, a transmission wheel connected to the door body, and a transmission wheel connected to the handle on the transmission path between the handle for raising the door body. Is provided so that these transmission wheels can be interlocked and separated from each other. Then, as one of the transmission wheels rotates in the direction in which the door falls, the other transmission vehicle is separated from the one transmission vehicle. By configuring the transmission means in this way, when the door suddenly falls or descends during the operation of the handle, the handle is immediately separated from the transmission path with the door to prevent the handle from rotating in the reverse direction. Therefore, the handle can be handled safely and safely.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 is a water control door body rotatably arranged on a river bed 2 via a hinge portion 3. Reference numeral 4 denotes a wire for pulling up the door body 1, which is wound around the drum 5.
Reference numeral 6 denotes a ratchet wheel, which is connected to the drum 5 via pulleys 7, 8 and a belt 9 and rotates together with the drum 5. Reference numeral 11 is a stopper of the ratchet wheel 6, and 12 is a float for detecting the water level, which constitutes the automatic device 10. Always a stopper
Reference numeral 11 is engaged with the ratchet wheel 6 to prevent its rotation, and in this state, the door body 1 is prevented from falling, but when the water level of the river rises and the float 12 rises to a predetermined height, the stopper
11 rotates counterclockwise and separates from the ratchet wheel 6,
The rotation prevention state of the drum 5 is released, and the door body 1 rotates clockwise due to its own weight and falls. Since the automatic device 10 is well known, detailed description of its structure is omitted.

Reference numeral 13 is a rotary handle for pulling up the door body 1, and G1, G2, G3 are gears as transmission wheels arranged in a transmission path from the handle 13 to the door body 1 (see also FIG. 2). ). gear
G1 is connected to the door body 1 and rotates in conjunction with the ups and downs of the door body 1. The gear G2 and the gear G3 mesh with each other, and the gear G3 is connected to the handle 13. The gear G2 and the gear G3 are attached to the same attachment member 15. 16 is a spring,
The spring force acts in the direction in which the gear G2 meshes with the gear G1. That is, the rotating shaft 17 of the gear G3 is a fixed point,
The rotating shaft 18 of the gear G2 is slidable in the lateral directions a and b around the rotating shaft 17, and by swinging in the directions a and b, the gear G1 and the gear G2 are appropriately meshed with each other and interlock. It is separable. Reference numeral 19 denotes a locking member for the gear G2, the rear end of which is rotatably attached to the stopper 20 and the front end locking portion 19a thereof is engaged with the gear G2. The locking portion 19a is bent inward, and the gear G2 door body pulling direction (solid line arrow direction)
Rotation is allowed, but the door body falls over (the direction of the dashed arrow)
To turn to.

The present apparatus has the above-mentioned configuration, and when pulling up the door body 1 which has fallen on the riverbed 2, the handle 13 is manually rotated. Then, the gears G1 to G3 rotate in the direction of the solid line arrow, the wire 4 is wound around the drum 5, and the door body 1 stands up. If the heavy door body 1 begins to fall for some reason while the handle body 13 is being rotated to raise the door body 1, the gear G1 suddenly rotates in the reverse direction at high speed in the direction of the broken line arrow. Get started. Then, the gear that meshes with this gear G1
G2 also does not rotate in the direction of the dashed arrow, but it cannot rotate in this direction because rotation in this direction is blocked by blocking member 19, and due to the rotational reaction force received from gear G1, gear G2 Swings around the rotary shaft 17 in the direction of arrow a and separates from the gear G1. That is, when the gear G1 starts to rotate in reverse due to the overturning of the door body 1, the gear G2 is immediately disconnected from the rolling path with the door body 1, so that the gear G2 does not rotate and is therefore connected to this. The handle 13 also does not rotate in the reverse direction. When the door body 1 completely falls on the riverbed 2, the rotation of the gear G1 also stops, and the gear G2 swings in the direction of arrow b by the spring force of the spring 16 and meshes with the gear G1 again. Then, by rotating the handle 13 again, the door 1 can be pulled up.

(Other Embodiment) FIG. 3 shows another embodiment of the present invention.
A pinion 21 is attached to the rotating shaft 20 of G1. Reference numeral 22 denotes a rack that engages with the pinion 21, and is pivotally attached to a protrusion 15a that is provided so as to protrude from the mounting member 15. When the gear G1 rotates in the door body pulling direction, the rack 22 idles on the pinion 21, and the gear G2 rotates in the same direction in conjunction with the gear G1.However, when the gear G1 rotates in the door body falling direction, the rack 22 slides to the left, the mounting member 15 swings in the direction of arrow a, and the gear G2 is separated from the gear G1 (see the chain line in the figure).

Further, in the structure shown in FIG. 4, a timing belt 25 is banded on the gears G1 and G2, and a locking member 26 is locked on a gear G4 provided coaxially with the gear G2. 27
Is a spring for holding, and its spring force acts in a direction in which the gear G2 is swung in the direction of arrow a to tension the belt 25, that is, in a direction in which the gear G1 and the gear G2 are interlocked and rotated. When this gear G1 rotates in the door body pulling direction, the gear G2 also rotates in the same direction in conjunction with the gear G1, but when the gear G1 rotates in the door body falling direction, it engages with the gear G4. Due to the action of the locking member 26, the gear G2 cannot rotate in the same direction, and the rotation reaction force causes the gear G2 to swing in the direction of arrow b to loosen the belt 25, so that the gear G2 is separated from the gear G1 and the handle 13 does not rotate.

The present invention is not limited to the above-mentioned embodiment, and various design changes are possible, for example, it goes without saying that the present device can be applied to a lifting type door body as well. When the descent is started, the handle may be separated from the transmission path with the door body so as not to rotate in the reverse direction as described above.

(Effect of the Invention) As described above, according to the present invention, when the heavy door body 1 starts to fall down while the handle 13 is being operated, the handle 13 is immediately separated from the power transmission path and rotates in the reverse direction. Since this can be prevented, there is no risk of injuring the hand or the like holding the handle 13, and the handle can be handled safely and safely.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an exploded perspective view of the whole, FIG. 2 is a front view of essential parts, and FIGS. 3 and 4 are front views of other embodiments. . 1 ... Door 13 ... Handle G1 ... Transmission vehicle connected to the door G2 ... Transmission vehicle connected to the handle

Claims (1)

[Claims] 1. A transmission wheel connected to the door body and a transmission wheel connected to the handle are provided in a transmission path between a water control door body and a rotary handle for pulling up the door body. , The transmission vehicles are interlockable and separable from each other, and the other transmission vehicle is separated from the one transmission vehicle as one transmission vehicle rotates in the direction in which the door falls. Lifting device for water door.