JP2558452B2 - Fall weir - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fall weir in which a weir plate provided in a waterway is tumbled and stood as necessary to adjust the water level in the waterway. is there.

[Prior Art] There is a fall weir in which the base of a weir plate is pivotally attached to the bottom of a water channel, and the weir plate is tumbled and erected with this base as the center of rotation.
In the conventional fall weir of this type, a wire fed from a winding device installed on the levee is connected to the upper end of the weir plate, and the wire is used to support the weir plate in an upright state and to wind the wire with the winding device. By taking it, it was supposed to stand up the falling weir board.

[Problems to be Solved by the Invention] In the above-mentioned conventional overturning weir, since the weir plate is directly suspended by the wire, the wire is paid out in a predetermined direction and at an angle within a predetermined range with respect to the weir plate. The hoisting device must be installed, and the installation position of the hoisting device is limited. In addition, there is also a problem in that floating substances such as dust in running water may become entangled near the tip of the wire connected to the dam plate during water storage, which may hinder the overturning / standing operation of the dam plate.

[Means for Solving Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the fall weir according to the present invention is a fall weir including a rotatable weir plate whose base is pivotally attached to the bottom of a water channel and a winding device that erects the weir plate, and one end of the fall weir is A rotary shaft that projects into the water channel and has the other end penetrating the side wall and projecting out of the water channel is provided near the bottom of the water channel, and the upper end of the rotary shaft has the upper end through the rotary roller. And a base part of a dam plate supporting arm that abuts on the upper end part of the dam plate and supports the dam plate is attached, and a wire fed from a winding device to a tip end portion is attached to a protruding portion of the rotating shaft opposite to the water channel. Is attached to the base portion of the drive arm, and the wire attachment position of the drive arm is set higher than the contact position of the barrier plate support arm with the rotating roller in the standing state of the barrier plate.

[Operation] When the drive arm is held at a predetermined winding position by the hoisting device, the weir plate support arm integrated with the drive arm is fixedly supported in an upright state via the rotating shaft. When the weir plate is laid down during water storage, if the holding of the drive arm is released, the weir plate will lie down together with the weir plate support arm due to its own weight and water pressure. Further, in the case of raising the fallen weir plate, if the drive arm is rotated in the raising motion direction of the weir plate by the winding device, the weir plate support arm is also rotated in the same direction. The weir plate stands up with the movement.

[Embodiment] FIG. 1 and the following figures show an embodiment of a fall weir according to the present invention. In this overturning weir 1, a mounting base 3 having an I-shaped cross section is installed at the bottom of a water channel 2 so as to fill the width of the water channel 2, and a weir plate 6 is hingedly mounted on a mounting plate 5 fixedly provided at an appropriate position of the mounting base 3. It is movably attached. Further, door stops 11, 11 made of steel plates are provided on the inner surfaces of the left and right concrete waterway walls 10, 10 '.

The barrier plate 6 is formed by integrally fixing a cylindrical upper pipe 14 to the upper portion of the frame body 13, and attaching a skin plate 15 made of a steel plate to the upstream side surfaces of the frame body 13 and the upper pipe 14. A plate-shaped mounting board 17 is provided at the lower end of the frame body 13 so as to project therefrom.
It is supported by a support pin 19 provided on the. Upper pipe 14
Is provided with a gap S between it and the waterway wall 10 on one side (the left bank in the illustrated example). A support shaft 21 is projectingly provided on the end face on this side, and a roller 22 rotates on this support shaft 21. It is attached freely. Further, the skin plate 15 is formed with a water draining portion 15a at the end portion on the water channel wall 10 side, which also serves as a dust guard for the gap S. A rubber member 23 for keeping watertightness is attached to a gap between the lower end of the skin plate 15 and the mounting base 3 and a gap between the side of the skin plate 15 and the door stop 11.

A concrete enclosure 25 is provided outside the waterway wall 10 on the left bank, and the inside of the enclosure 25 becomes a drive arm chamber 27 having a depth almost the same as the depth of the waterway 2, and a hoisting device 26 is provided on the enclosure 25. is set up. A bearing 30 is fixed to an through hole 28 formed in the lower portion of the water channel wall 10 by an anchor bolt 31, and a rotary shaft 32 is supported by the bearing 30. Both ends of the rotary shaft 32 project to both inside and outside of the water channel wall 10, and these projecting parts 32a and 32b are formed as square rod-shaped fitting parts. Then, a weir plate support arm 34 having the upstream surface of the tip end abutted on the roller 22 of the weir plate 6 is fitted to the water channel side protrusion 32a, and the protrusion 32b on the opposite side to the water channel. A drive arm 35 to which a wire 36 drawn from the take-up pulley 26a of the hoisting device 26 is attached is fitted to the tip of the drive arm 35. In the illustrated example, both arms 34, 35 are attached to the rotary shaft 32 in substantially the same direction as the dam plate 6, but the attachment angle of the arms is arbitrary. The winding device 26 has a function as a locking unit that locks the rotation of the winding pulley 26a and a function as a driving unit that rotates the winding pulley 26a in a direction in which the wire 36 is wound, if necessary. A ratchet mechanism or the like may be used as the locking means, and a motor or a manual handle may be used as the power source of the driving means. It is desirable that the rotary shaft 32 is provided on or near the extension line of the central axis of rotation of the dam plate 6, but it is not always necessary to do so.

Next, the operation and operation of this overturning weir 1 will be described.

During normal water storage, the wire 36 is wound by the hoisting device 26 so that the drive arm 35 stands up as shown in the figure, and the dam plate 6 is held in a predetermined standing state.
The take-up pulley 26a is prevented from rotating in the unwinding direction X of the wire 36 by the action of a locking means such as a ratchet mechanism built in the hoisting device 26. Therefore, the dam plate support arm 34, which is integrated with the drive arm 35 via the rotary shaft 32, is also fixed at the position shown in the figure, and the dam plate support arm 34 supports the dam plate 6 in an upright state. . Wire
By adjusting the feed amount of 36 and changing the angle of the drive arm 35, the inclination of the weir plate 6 with respect to the water channel 2 can be changed, whereby the water level can be adjusted.

When it becomes necessary to lower the water level due to water increase or the like, when the ratchet mechanism is released, the drive arm 35 and the weir plate support arm 34 become free, and the weir plate 6 falls due to its own weight and the stored water pressure (Y direction). To turn). At this time, the roller 22 rolls on the upstream surface of the barrier plate support arm 34. As a result, the water stored on the upstream side of the dam plate 6 is discharged. It is convenient if a detecting means such as a float for detecting the water level in the water channel 2 is provided so that the lock by the ratchet mechanism or the like is automatically released when the water level exceeds a certain level.

Further, when the fallen weir plate 6 is to be erected, the motor incorporated in the winding device 26 or the take-up pulley 26a is manually operated.
Is rotated in the winding direction (counter X direction). Take-up pulley
In response to the winding of the wire 36 by the wire 26a, the drive arm 35 and the barrier plate support arm 34 rotate in the anti-Y direction, and are pushed up by the barrier plate support arm 34 to raise the barrier plate 6. On this occasion,
Since the roller 22 comes into contact with the barrier plate support arm 34 and pushes up the barrier plate 6 while rolling, friction does not occur between the arm and the barrier plate, and a smooth standing operation can be performed. It is like this. Further, since the force in the direction perpendicular to the water channel is not transmitted to the weir plate 6, it is preferable in terms of accuracy and strength and water tightness.

This overturning weir 1 has a structure in which the drive arm 35 provided on the side portion of the waterway 2 is lifted by the wire 36 without directly lifting the dam plate by the wire fed from the pulley of the hoisting device. Is located outside the waterway 2, and foreign matter such as driftwood is not entangled in the wire. Since the drainer 15a is formed as an extension of the skin plate 15 and has no unevenness on the surface, dust and the like are less likely to be caught in this portion as well. In addition, since the watertight rubber 23 exists up to the tip of the draining portion 15a formed at the side end of the dam plate 6, dust or the like does not get caught between the door stop 11 and the dam plate 6.

Further, since the weir plate support arm 34 and the drive arm 35 can be provided so as to be out of phase with each other, by appropriately setting the phase of both arms, the degree of freedom with respect to the installation position of the hoisting device 26 increases, Can be installed at an appropriate position according to the location conditions.

Further, when the center of the rotary shaft 32 is O, the contact point between the dam support arm 34 and the roller 22 is P, and the wire connection point of the drive arm 35 is Q, the working radii of the arms 34 and 35 are OP and OQ. As will be appreciated, if OQ is set longer than OP, the winding driving force of the wire can be small, and the motor of the winding device 26 can be downsized.

In the illustrated example, the hoisting device having both functions is adopted as the locking means and the driving means of the drive arm, but other devices and methods may be adopted as the locking means and the driving means.

[Effects of the Invention] As is clear from the above description, the overturning weir according to the present invention has flexibility in the positional relationship between the weir plate and the hoisting device, so that it can be easily installed according to the site conditions, The accuracy of can be loosened. In addition, since a connecting tool such as a wire for hoisting and supporting the barrier plate is provided outside the water channel, it is completely eliminated that dust or the like in running water is entangled with the wire. Particularly, in the present invention, the weir plate support arms projecting upward and the bases of the drive arms are attached to both sides of the rotary shaft provided near the bottom of the water channel, and the upper end of the weir plate support arm is attached via a rotating roller. Abut on the upper end of the dam to support the dam plate,
A wire fed from a winding device is connected to an upper end portion of the drive arm, and a wire connection position of the drive arm is higher than a contact position of the dam plate support arm with the rotating roller in a standing state of the dam plate. So, standing up of the weir board,
In addition to the smooth fall, a large torque for raising the barrier plate can be obtained without making the hoisting device larger than necessary.

[Brief description of drawings]

FIG. 1 is a view of an example of a fall weir according to the present invention viewed from the downstream side of a water channel, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.
FIG. 4 is a side view showing a partial cross section of the main part. 1 ... Overturning weir, 2 ... Waterway, 6 ... Weir plate, 10, 10 '...
Waterway wall, 26 …… Winding device, 32 …… Rotating shaft, 32a, 32b…
… Projection end, 34 …… Dam plate support arm, 35 …… Drive arm, 36 …… Wire

Claims (1)

(57) [Claims] 1. A fall weir having a rotatable weir plate whose base is pivotally attached to the bottom of a water channel and a hoisting device for raising the weir plate, in which one end projects into the water channel and the other one A rotary shaft whose end portion penetrates the side wall portion and projects outside the water channel is provided in the vicinity of the bottom of the water channel, and the rotation shaft has a protrusion in the water channel,
The upper end of the weir plate supporting arm supporting the weir plate is attached to the upper end of the weir plate via the rotary roller, and the base of the arm on the side opposite to the water channel of the rotary shaft is attached to the tip. The base of the drive arm to which the wire unwound from the winding device is attached is attached, and the wire attachment position of the drive arm is made higher than the contact position of the weir plate support arm with the rotating roller in the upright state of the weir plate. A fall weir characterized by that.