JP5600617B2 - Undulating weir - Google Patents

Description

  The present invention relates to an undulating weir that is installed in a water channel and can be switched between a dammed state and an open state of the water channel.

As a undulation weir that is installed in a water channel and adjusts the flow rate of the water channel, as disclosed in Patent Document 1, a structure composed of a door body made of a steel plate and a bag body made of a rubber bag or the like is known.
The door body is rotatable between a standing position and a lying position with a lower end portion fixed to the water bottom as a center.
In addition, the bag body is installed adjacent to the downstream side of the water channel from the door body, and can be switched between an expanded state and a contracted state by supplying and discharging air into the interior using an air compressor or an exhaust valve. It has become.

When the adjacent bag body is in an inflated state, the door body is pushed up by the bag body and stands up to dam the water channel. On the other hand, when the bag body is in the contracted state, the door body falls down due to its own weight and opens the water channel.
Therefore, by controlling the supply and discharge of air to and from the bag body, the bag body functions as a door body pusher, and the flow rate of the water channel can be adjusted.

In the conventional undulation weir of this type, a single large bag body is installed as a door body pusher with respect to the door body (see FIG. 1 of Patent Document 1).
Therefore, when a stone or the like that rolls in the water channel collides with the bag body, and a hole breaks up in the single bag body and air leaks out from it, the door body always falls down. The waterway will be open.
For this reason, the use of the weir is eliminated. Therefore, if the hole is broken, the bag body is repaired and costs are increased.

  Further, in order to push up the door body only by the expansion action of the bag body, it is necessary to supply a large amount of air to the bag body. Furthermore, when pushing up only by the expansion action, the time span from the start of the supply of air to the bag body until the start of the door body is large, so there is room for improvement in reactivity.

Japanese Patent No. 3967711

  Therefore, the problem to be solved by the present invention is to improve the reactivity of the door body for the hoisting weir and to enable the hoisting operation of the door body even when a part of the pusher is broken.

In order to solve the above-mentioned problems, a rubber tube capable of supplying and discharging air is used for the hoisting device for the hoisting weir of the present invention.
A plurality of rubber tubes are juxtaposed in the width direction of the water channel on the downstream side of the door body, folded so that both ends of each rubber tube overlap each other, and fixed to the bottom of the water with both ends sealed by a fixture. It was.
Also, the folded rubber tube is folded up and down so that the whole is shaped like a dogleg, and one hypotenuse of the cheek is in contact with the bottom of the water, and the other hypotenuse of the cheek is the door body. It was built between the bottom of the water and the door so that it touches the side of the door.

When air is supplied to the rubber tube folded in a U shape, the expansion of the rubber tube causes an action to expand straight, so the door body is pushed up by the extension force of the rubber tube and stands up, and the water channel is blocked. It can be stopped.
Further, when air is discharged from the rubber tube, it shrinks and bends to the shape of the original, so that the door body that has lost the support of the rubber tube falls down due to its own weight, and the water channel is opened.

  Since each rubber tube functions independently as a push-up machine in parallel with the width direction of the water channel, even if one of the rubber tubes loses its function due to a broken hole or the like, there is no problem in raising and lowering the door body.

  Since the door body is pushed up by the expansion action of the relatively small rubber tube, less air supply is required than when the door body is pushed up by the expansion action of the relatively large bag body. At the same time, since the expansion action of the rubber tube starts almost simultaneously with the start of air supply, the time span until the door body starts to be pushed up is shortened and the reactivity is improved.

  The rubber tube to be used does not need to be a special one and can be used widely, so the cost is low.

Perspective view of undulation weir Cross section of undulating weir Partially broken side view showing dammed state of undulating weir channel Partially broken side view showing the open state of the waterway of the undulation weir

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The undulation weir 1 of the embodiment shown in FIG. 1 and FIG. 2 is used to adjust the flow rate of the water channel by being installed in the water channel and switching between the dammed state and the open state of the water channel.
The hoisting weir 1 of the embodiment includes a door body 10 fixed on the upstream side of the water channel, and a pusher 20 that is fixed on the downstream side of the water channel and moves the door body 10 up and down.

The door body 10 includes a rectangular door plate 11 made of a steel plate and the like, a support shaft 12 fixed along the width direction of the door plate 11 to the lower end portion of the back surface of the door plate 11 (the surface facing the downstream of the water channel), Is provided.
The support shaft 12 is rotatably supported by a bearing 13 fixed to the bottom of the water in parallel in the width direction of the water channel. As a result, the door plate 11 can rotate between a lying position that is substantially parallel to the water bottom and a standing position that rises from the water bottom, with the support shaft as the center.

Further, a prismatic door stop 14 is fixed to the water bottom upstream of the water channel from the door plate 11 along the width direction of the water channel. When the door plate 11 is rotated by a predetermined angle or more, the rotation range is regulated by the surface of the door plate 11 coming into contact with the door stop 14.
The gap between the lower end of the surface of the door plate 11 (the surface facing the upstream of the water channel) and the door stop 14 is closed by a flexible cover 15 made of a rubber sheet or the like. Therefore, intrusion of pebbles and the like from the upstream side of the water channel between the door plate 11 and the door stop 14 is prevented, and failure is prevented.

Furthermore, a plurality of U-shaped guides 16 are fixed to the back surface of the door plate 11 in parallel in the width direction of the door plate 11. As shown in the drawing, both sides of the guide 16 stand up (project) from the back surface of the door plate.
Further, ribs and irregularities may be appropriately attached to the entire surface of the door plate 11 in order to improve the strength of the door plate 11 and prevent dust from adhering to the door plate 11.

On the other hand, the plurality of pushers 20 are juxtaposed in the width direction of the water channel, and face the guide 16 of the door plate 11 on a one-to-one basis. The parallel number is not particularly limited.
Each pusher 20 includes a rubber tube 21 disposed on the upstream side of the water channel and a fixture 22 disposed on the downstream side of the water channel and fixing the rubber tube 21 to the water bottom.

  As the rubber tube 21, a relatively wide type is used among inexpensive ones that are widely used. Each rubber tube 21 is folded up and down (folded in two), and both open end portions are overlapped with each other, and the both end portions are fixed by a fixing tool 22.

The rubber tube 21 folded in half is further folded into a square shape, and one oblique side portion 21a of the square shape is placed on a floor plate 23 laid on the water bottom between the door body 10 and the fixture 22. Yes. In addition, the other oblique side portion 21b of the dogleg is incorporated (loaded) between the door body 10 and the fixture 22 so as to contact the guide 16 of the door body 10.
In addition, on each contact surface with the rubber tube 21 of the guide 16 and the flooring board 23, in order to protect the rubber tube 21, a sheet having a cushioning property made of a rubber sheet or the like may be laminated.

Furthermore, the one oblique side portion 21 a of the rubber tube 21 is bound together by overlapping portions on the floor plate 23 by a band-like binding band 24.
Further, a pipe 25 extending in the width direction of the water channel is connected between the binding portion of each rubber tube 21 by the binding band 24 and the fixing portion by the fixing tool 22.
As shown by the arrows in FIG. 1, compressed air can be supplied from the air compressor (not shown) into each rubber tube through the piping 25, and the air in each rubber tube 21 can be supplied from the exhaust valve 25a. Can be discharged.

  Here, the fixture 22 includes a pedestal 22a fixed to the bottom of the water along the width direction of the water channel, a holding plate 22b on the pedestal 22a, and a retaining shaft 22c disposed on the downstream side of the pedestal 22a. .

  On the flat upper surface of the pedestal 22a, a portion close to the end of the intermediate portion of the rubber tube 21 is placed, and a pressing plate 22b is mounted thereon, and the pedestal 22a and the pressing plate 22b are bolted. Yes. Thereby, the said location of the rubber tube 21 is inserted | pinched between the base 22a and the pressing board 22b, and is being fixed.

Further, the upper end and the lower end of the rubber tube 21 folded up and down are respectively wound around a pair of upper and lower retaining shafts 22c, and the rewinding portion of the rubber tube 21 is between the base 22a and the holding plate 22b. (See FIG. 2). By this winding and fixing, both end portions of the rubber tube 21 are securely sealed.
The diameter of the retaining shaft 22c is set to a size that does not pass through the gap between the base 22a and the pressing plate 22b. For this reason, the both ends of the rubber tube 21 do not come out of the gap between the base 22a and the holding plate 22b, and the reliability of fixing the rubber tube 21 is increased.

The configuration of the undulating weir 1 of the embodiment is as described above. When air is supplied to the rubber tube 21 bent into a dogleg shape through the pipe 25 as shown in FIG. 3, the expanding rubber tube 21 is straight. The force that tries to stretch is applied.
Therefore, the one oblique side portion 21a of the rubber tube 21 placed on the floor plate 23 of the bottom of water and the other oblique side portion 21b contacting the guide 16 of the door body 10 tend to separate, and as a result, the door plate 11 is pushed up ( Rotate in a standing direction (lifted up). Thus, the water channel is dammed up by the door plate 11 standing up.

  On the other hand, when the air in the rubber tube 21 is exhausted from the exhaust valve 25a, the rubber tube 21 contracts as shown in FIG. . At the same time, the door plate 11 that has lost the support of the rubber tube 21 rotates in the direction of lying down due to its own weight. Thus, the waterway is opened by the door plate 11 lying down.

  By controlling the operation of the air compressor and the exhaust valve 25a and adjusting the supply and discharge of air to and from the rubber tube 21, it is possible to easily switch between the damming state and the open state of the water channel of the undulation weir 1. .

Here, when air is supplied to the rubber tube 21, a force is applied to the rubber tube 21 to extend straight almost simultaneously with the start of supply, so that the door plate 11 is also pushed up early. Good reactivity.
Also, even if the rubber tube 21 of one pusher 20 is damaged and the function is lost due to the pusher 20 being damaged, as long as the other pushers 20 operate normally, the door plate is used. Since there is no hindrance to the undulating motion of 11, it is resistant to failure.

Since the rubber tube 21 is bound by the binding band 24, the folded portion does not open (separate) when air is supplied. As a result, the expansion force of the rubber tube 21 does not escape in the opening direction but concentrates in the direction in which the rubber tube 21 tries to expand.
Further, the contact portion of the rubber tube 21 with the door plate 11 is not laterally shifted by the guide 16, so that the force to be pushed up does not escape in the lateral direction.
By such an action of the binding band 24 and the guide 16, the door plate 11 can be pushed up efficiently and reliably.

The above embodiment is merely an example, and the scope of the invention is not limited thereto.
The scope of the present invention is defined based on the description of the scope of claims, and all modifications can be made to the embodiments within the scope of the contents shown in the scope of claims. It is intended to be included in the invention.

For example, a girder member may be fixed between the bearing 13 of the door body 10, the floor plate 23 of the pusher 20, and the base 22 a of the fixture 22, and these may be integrated.
The pattern of the pipe 25 is not limited to that shown in the drawing, and it is only necessary that air can be supplied to and discharged from each rubber tube 21.
The structure of the guide 16 is not limited to the U-shape of the embodiment. In short, the protrusions are provided on the left and right of the contact portion of the rubber tube 21 with the door plate 11 so that the rubber tube 21 does not move left and right. I just need it.
The structure of the door stop 14 is not limited to the prismatic type of the embodiment, and the point is that the door plate 11 may be in contact and its rotation range is restricted. For example, an L-shaped structure may be used.
The structure of the fixing device 22 is also particularly preferable because the rubber tube 21 has a high sealing property as the structure of the embodiment, but is not limited thereto, and a known sealing and fixing structure can be adopted.

DESCRIPTION OF SYMBOLS 1 Undulating dam 10 Door body 11 Door plate 12 Support shaft 13 Bearing 14 Door stop 15 Cover 16 Guide 20 Pusher 21 Rubber tube 21a One oblique side part 21b Other oblique side part 22 Fixing tool 22a Base 22b Holding plate 22c Stopping shaft 23 Laying board 24 Cable tie 25 Piping 25a Exhaust valve

Claims (4)

A hoisting weir 1 installed in a waterway and capable of switching between a dammed state and an open state of the waterway,
A plate-like door body 10 that can rotate between a standing position and a lying position around a lower end fixed to the bottom of the water;
A plurality of push-up machines 20 that are adjacent to the downstream side of the door body 10 of the water channel and are arranged in parallel in the width direction of the water channel and move the door body 10 up and down,
Each pusher 20 is
A rubber tube 21 that is folded so that both end portions overlap each other vertically, and that can supply and discharge air therein;
A fixing tool 22 for sealing both ends of the rubber tube 21 and fixing the rubber tube 21 to the water bottom,
The folded rubber tube 21 is
Furthermore, the whole is bent up and down in a V shape, so that one hypotenuse 21a of the cheek is in contact with the bottom of the water, and the other hypotenuse 21b of the cheek is in contact with the door 10 side. An undulating weir built in between the bottom of the water and the door body 10.   2. The hoisting weir according to claim 1, wherein each of the push-up machines 20 further includes a binding band 24 that binds the rubber tubes 21 that are vertically overlapped on the one oblique side portion 21 a.   The hoisting weir according to claim 1 or 2, wherein the door body 10 further includes guides 16 rising from both sides of a portion where the other oblique side portion 21b of the rubber tube 21 of each pusher 20 contacts. The fixture 22 is
A pedestal 22a that is fixed to the bottom of the water downstream of the rubber tube 21 and places an intermediate portion of the rubber tube 21 that overlaps vertically;
A pressing plate 22b for pressing the rubber tube 21 on the pedestal 22a from above;
A pair of retaining shafts 22c for winding the upper end portion and the lower end portion of the rubber tube 21 folded up and down on the downstream side of the water channel from the pedestal 22a and the holding plate 22b, respectively. The undulating weir according to any one of the above.

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