JPS5965114A - Rising and falling dam - Google Patents

Abstract

PURPOSE:To prevent the breakage of a dam due to drifting woods, etc., by protecting the dam by a gate door rotatably provided on the upstream side of plural baggy dams set on the river bed in such a way that it is set in contact with the plural baggy dams and is turned around a rotary shaft on the river bed. CONSTITUTION:When air is supplied through a pipe 6 and a supply and discharge pipe 5 into dams 4a-4d of a rubberized sheet, the dams 4a-4d are inflated in a fan-shaped form on the basal end (a) as the center. A gate door 1 rotatably set on a rotary shaft 3 as the center in the upstream side of the dams 4a-4d is pushed up and raised while being turned by the dams 4a-4d. During the flooding period, since the dams 4a-4d are protected by the gate door 1, the breakage of the dams 4a-4d due to the hitting of drifting woods can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an undulating weir consisting of a bag-like weir body, in which a plurality of bag-like weir bodies are arranged in a superimposed manner on the downstream side of a door body rotatably disposed on a river bed. The upper surface of the uppermost bag-like weir body is brought into contact with the downstream side surface of the door body at least when it is erected.

An undulating weir is known in which a bag-like weir body formed of a rubber-coated cloth sheet or the like is made to undulate by injecting and discharging fluid such as air. The weir body is extremely susceptible to damage due to collision of driftwood etc. with the surface of the weir, and if the internal fluid is discharged and the weir is laid down on the riverbed,
Sediment and rocks were piled up on the top surface, often damaging the weir body.In addition, this rice-raised weir is difficult to adjust and change the weir height uniformly and accurately over the entire weir, so it is difficult to adjust the weir height uniformly and accurately. It also had some drawbacks that made it unsuitable for clothing.

Therefore, the present invention has been made for the purpose of providing an undulating weir that eliminates the σ5 defect of the conventional one, and has a plurality of bag-shaped weirs installed downstream of a door rotatably disposed on a riverbed. The base ends of these bag-like weir bodies are positioned near the rotation axis of the door body, and the top surface of the uppermost bag-like weir body is placed in the vicinity of the rotation axis of the door body. At least when the door body is erected, the door body is brought into contact with the downstream side surface of the door body, and fluid injection and discharge pipes are connected to each of the bag-like weir bodies. The body protects the weir from stones, driftwood, etc., and allows the height of the weir to be adjusted uniformly and accurately over the entire area.

Hereinafter, the present invention will be explained in detail along with Figure J.

FIG. 1 is a top view, and FIG. 2 is a side view, in which l designates a door body, the lower end of which is disposed above a river bed 2 so as to be freely rotatable about a rotating shaft 3. 4a14b, 4c, and 4d are bag-like weir bodies each formed of a rubberized cloth sheet or the like,
Each of the weir bodies 4a to 4d is arranged to overlap with the downstream side of the door l, and in the upright state, the upper surface of the uppermost weir body 4a comes into contact with the downstream surface of the door body 1, and the gate body 1 from below. The base end a of each weir body 4a to 4d is located on the riverbed 2 and near the lower end rotation axis 3 of the gate body 1, and the tip end of each weir body 4a to 4d is a free end. It has become. Third
The figure shows an enlarged side cross section (
9), the base end a of each weir body 4a to 4d communicates with an air injection/discharge pipe 5, and this pipe 5 is connected to a vibro buried in the river bed 2, and the vibro is further connected to a blower ( (not shown).

In the above configuration, air can be sent into each weir body 4a to 4d through the vibro, injection and discharge ¥4-5, and each weir body 4a
4d expands and stands up in a fan shape around the base part a, and together with this, the BH body 1 is also pushed up by each of the weir bodies 4a to 4d and rotates and stands up (see the solid line in FIG. 2). Incidentally, during floods, driftwood, etc. collide with the weir bodies, but each of the weir bodies 4a to 4d is covered and protected by the door body 1, so that they will not be damaged by collisions with driftwood, etc.

Furthermore, even if a large water pressure is applied to the door body 1, the door body 1, the upper surface of the uppermost weir body 4a, the upper and lower surfaces of each weir body 4a to 4d, the lower surface of the lowermost weir body 4d, and the bed 2 have a large area. Since there is surface contact, stress transmission is extremely good, and each weir body 4a~
Since no unreasonable stress is generated locally on 4d, it can sufficiently cope with the applied water pressure. In addition, each weir body 4a
If you exhaust the air within ~4d and collapse it, it will be protected (
(Refer to the second catalog) and will not be damaged by the accumulation of earth, sand, rocks, etc. Further, by arranging a plurality of weir bodies in a superimposed manner in this way, it is also possible to adjust and change the weir height uniformly and accurately over the entire weir body by adjusting the amount of air sealed in each weir body 4a to 4d.

In the above embodiment, air is injected and discharged to each of the weir bodies 4a to 4d through a common injection and discharge pipe 5, but each weir body 4a to 4d is connected to an independent injection and discharge pipe, and each It is also possible to separately inject and discharge fluid such as air.

As explained above, the undulating weir according to the present invention has a plurality of bag-like weir bodies arranged in a superimposed manner on the downstream side of a door body arranged on a river bed so as to be rotatable about a rotation axis, and these bags The base end of the shaped weir body is located near the rotation axis of the weir body, and
The top surface of the uppermost bag-like weir among these bag-like weirs is brought into contact with the downstream side surface of the door body at least when the bag-like weir is erected, and a fluid injection/discharge pipe is connected to each of the bag-like weirs. Since the bag-like weir body is covered and protected by the door body, there is no risk of damage, and the weir height can be adjusted and changed uniformly and accurately.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a top view of an undulating weir, Fig. 2 is a side view, and Fig. 3 is a side sectional view of the main part. l... Door body 2... River bed 3... Rotating shaft
4a to 4d... Bag-shaped integral body 5... Injection/discharge pipe a... Proximal end Applicant Kaisei Kogyo Co., Ltd. Agent Patent attorney Toshiyuki Takamatsu

Claims (1)

[Claims] A plurality of bag-like weir bodies are arranged in a superimposed manner on the downstream side of a gate body which is arranged on the river bed so as to be freely rotatable around a rotation axis, and the base ends of these bag-like weir bodies are connected to the rotation of the gate body. The uppermost bag-like weir among these bag-like weirs is arranged so that the upper surface of the bag-like weir comes into contact with the downstream side surface of the door body at least when the bag-like weir is erected, and each of the bag-like weirs An undulating weir with a fluid injection and discharge pipe connected to the weir body.