JPH0310763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water gate installed in a waterway such as agricultural water, and an object thereof is to provide a water gate that has a relatively simple structure and can be easily opened and closed.

The water gate according to the present invention is a water gate in which a gate is provided so as to be horizontally rotatable about its center, and the upper and lower parts of the gate are rotatable and slidable in the vertical direction around a rotation axis in the center of the gate. At the same time, a hanging bar fixed to the center of the gate protrudes upward from the upper rotating shaft, and a swivel and multiple wheels are attached to the upper part of the hanging bar. Sheave pairs are provided in order from the bottom, a counter ballast is connected to one end of a wire rope wound around this multi-wheel sheave pair, the upper multi-wheel sheave is fixed to the water gate member, and the lower multi-wheel sheave is attached to the swivel. These multi-wheel sheave pairs are fixed and connected by a pantograph that expands and contracts while preventing twisting, and the relatively simple structure allows the gate to be easily opened and closed in a gate that rotates horizontally around the center. This is how it was done.

The present invention will be described below based on illustrated embodiments. As shown in FIG. 1, the weight of the gate D is supported by a counter ballast 11. A hollow upper rotary shaft 12 is protruded from the upper surface of the central part of the gate D, and this rotary shaft 12 is supported by a bearing beam 13 so as to be rotatable and slidable in the vertical direction, and a shaft is inserted into the lower surface of the center. Hole 14
A lower rotating shaft 15 is provided to protrude from the floor slab 7.
is inserted into the shaft insertion hole 14 rotatably and slidably in the vertical direction.
5, the gate D is horizontally rotatable and vertically movable by a small amount.

Furthermore, a hanging bar 16 integrated with the gate D projects from the center of the gate D, penetrating the upper rotating shaft 12, and the upper end of this bar 16 connects to the lower multi-wheel sheave 17. Connected to the bottom. Here, since the bar 16 and the sheave 17 must be connected so as to be rotatable, the connection is made by connecting the protrusion 16A at the upper end of the bar 16 and the engagement groove 16A that engages with this protrusion.
It has a swivel structure consisting of 7A.

In addition, an upper multi-wheel sheave 18 is attached to the lower surface of the connecting girder corresponding to the lower sheave 17, and a wire rope 19 with a counter ballast 11 connected to one end is attached to these sheaves 17, 18 in n strips. Can be wrapped around. With such a configuration, the gate D can be suspended and held by a counterballast having a small weight, and can be easily horizontally rotated by the rotation drive mechanism 20.

The rotational drive mechanism 20 may be a winding transmission mechanism,
It consists of a large sprocket 21 attached to the upper end of the rotating shaft 12, a small sprocket 22 rotated by a handle 23, and a chain 24 wound around these sprockets 21 and 22.

Further, the sheaves 17 and 18 are connected by a pantograph 25 that expands and contracts while preventing each other from twisting, so that the lower sheave 17 does not rotate as the gate rotates horizontally.

Furthermore, the method of contact between the gate D and the weir 1 is as follows.
As shown in the figure, a stepped portion 26 is formed on the weir pillar 1, and the side surface in the thickness direction of the gate D is in contact with the door contact surface of the stepped portion. A water stop material 27 is attached to the door stop portion of the gate D, and this water stop material 27 is also continuously attached to the lower surface.

If it is a counter ballast type as above,
The counter ballast makes it possible to reduce the apparent weight of the gate to zero, making it easy to open and close the gate. Please note that the opening/closing amount can only be set during opening/closing operation.
The gate can be slightly lifted by the counter ballast to reduce friction with the waterway bottom, and placed in any position by the friction between the weight of the gate (for example, made of concrete) and the waterway bottom, or the counter ballast can be used to hold it suspended. In this state, the gate may be fixed using an appropriate stopper means.

As mentioned above, according to this invention, the gate is slightly lifted by the counterballast to reduce friction with the waterway bottom, and the apparent weight of the gate is reduced to zero to open and close the gate. It has a relatively simple structure and can be easily opened and closed. In addition, the load on the wire rope can be reduced by using multiple sheave pairs, and
The Pandagraph prevents the sheave from twisting and allows the gate to rotate horizontally without any problems.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a vertical sectional view showing one embodiment of a water gate according to the present invention, and FIG. 3 is a plan view showing a method of contacting the water gate with a weir pillar. 1...Weir pillar, 11...Counter ballast, 1
2...Upper rotating shaft, 13...Bearing beam, 14...Shaft insertion hole, 15...Lower rotating shaft, 16...Hanging bar, 16A...Protrusion, 17...Multi-wheel sheave, 1
7A...Engagement groove, 18...Multi-wheel sheave, 19...
...Wire rope, 20... Rotation drive mechanism, 21...
...Large sprocket, 22...Small sprocket, 2
3...Handle, 24...Chain, 25...Pantograph, 26...Step, 27...Water stop material.

Claims (1)

[Scope of Claims] 1. A water gate in which a gate is provided so as to be horizontally rotatable about its central portion, in which the upper and lower parts of the gate are supported by a rotating shaft in the central portion of the gate so as to be rotatable and slidable in the vertical direction. , a rotational drive mechanism is connected to the upper rotational shaft, and
A hanging bar fixed to the central part of the gate is provided to protrude upward from the rotation shaft of the upper part, a swivel and a pair of multi-wheel sheaves are installed in order from the bottom on the upper part of the hanging bar, and a pair of sheaves is wound around the pair of multi-wheel sheaves. A counterballast is connected to one end of the suspended wire rope, and the upper multi-wheel sheave is fixed to the water gate member, and the lower multi-wheel sheave is fixed to the swivel, and these multi-wheel sheave pairs are expanded and contracted while preventing twisting. A water gate characterized by being connected by a pantograph.