JPH09158159A - Earth and sand penetration preventive structure of rotary gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent a rolling stone or earth and sand from penetrating into a clearance between a door of a rotary gate and a river bed housing recessed area and set up the rotary gate even in a middle river basin as well. SOLUTION: A gate main body 10 where a cross section-covered door 12 is provided between a pair of support disks 11, is supported on a horizontal rotary shaft 13 by way of the support disks 11 in such a fashion that the door may be turnable and fixable with a pier at an arbitrary angle which shapes up a rotary gate 1 which forms a housing recessed area 4 which may house the door 12 on an equivalent river bed 2. An earth and sand penetration preventive board 6 is pivoted on the end edge rockably on the river bed 3 on the upper stream side of the housing recessed area 4 which houses the door 12 along the door 12 while it is provided so that the other edge may interfere with a moving area of the door 12. This earth and sand penetration preventive board is designed to cover the clearance 5 between the door 12 and the housing recessed area 4 irrespective of an angle of the door 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate which is arranged in the middle of a river and used for water level adjustment, and more particularly to a structure for preventing intrusion of sediment of a rotary gate in which a door rotates around a horizontal axis to open and close. Regarding

[0002]

2. Description of the Related Art There are various types of gates which are provided in the middle of a river and are used for water level control and the like.
What is called a roller gate is the most common.

As shown in a sectional view of an example of the roller gate in FIG. 6, the door body 21 is vertically moved up and down along vertical support pillar members (piers 20) arranged at predetermined intervals. The water is dammed by the door body 21, and the water is discharged from between the lower edge and the riverbed or over the upper edge (overflow).

However, in such a roller gate,
An elevating and lowering drive mechanism 22 such as a winch for further elevating and lowering the door body 21 is provided on the upper end of the pier 20 having a height required for elevating and lowering the door body 21.
Since large buildings have to be placed above the water surface, they have a considerable impact on the surrounding environment and landscape, and in some cases are not preferable.

As a solution to such a problem,
As shown in the cross-sectional view of FIG. 7, a gate body 30 in which a door body 32 having an arcuate cross section smaller than a semicircle is installed between a pair of support discs 31 is a support disc 31 with the door body 32 horizontal.
There is considered a rotary gate that is rotatably supported by the pier 20 via the pier 20 and has a storage recess 33 that can store the door 32 in the corresponding riverbed. According to this, the mechanism for rotationally driving the gate main body 30 can be housed inside the pier 20, and it is possible to prevent a large building from protruding above the water surface. In this configuration, as shown by the solid line in the figure, the door body 32 is in a fully closed state when the back surface thereof is vertical, and from this state, the gate body 30 moves counterclockwise by 9 degrees.
When the door body 32 is housed in the housing recess 33 by being rotated 0 °, the back surface of the door body 32 becomes flat with the front and rear river beds in the state shown by the imaginary line in the figure, and the gate is opened.

[0006]

However, since the rotary gate having the above-described structure allows the door body 32 to rotate between the arcuate outer surface of the door body 32 and the accommodation recess 33 formed in the riverbed. Is necessary, and if boulders or earth and sand enter this gap, the rotation of the gate body 30 (adjustment of the gate opening degree) is hindered, and in the worst case, the gate body 30 may be caught and the gate body 30 may become unrotatable. . For this reason, it could not be installed in the middle watershed of a river where boulders and earth and sand flow down, and there were only a few examples of use in estuary weirs such as seawalls where only fine sand and mud flowed down.

The present invention has been made to solve the above-mentioned problems, and can prevent rocks and earth and sand from entering the gap between the door of the rotary gate and the recess for accommodating the bed of the river. Another object of the present invention is to provide a structure for preventing the intrusion of earth and sand of a rotary gate that allows the installation of a rotary gate.

[0008]

In the structure for preventing intrusion of sediment of a rotary gate according to the present invention, which achieves the above object, a gate main body in which a door body having an arcuate outer peripheral surface is provided between a pair of support disks is provided. , The door body is supported horizontally and is supported by the support pillar member via the support disk so as to be rotatable about a horizontal axis and fixable at an arbitrary angle, and a corresponding accommodation recess for accommodating the door body in the river bed. In the rotary gate formed, a plate-shaped member for preventing intrusion of earth and sand is provided in the riverbed portion on the upstream side of the accommodation recess over the entire installation area of the door body.
The end body is pivotally mounted at the end edge and the other end edge is provided so as to interfere with the movement range of the door body, and the door body of the earth and sand intrusion prevention plate member is housed in the accommodation recess. In the state, the gap between the door body and the housing recess is covered, and when the door body projects from the housing recess to the riverbed surface, the tip of the door body abuts the arc-shaped outer peripheral surface of the door body and swings. It is configured so as to cover the gap between the door body and the accommodating recess in an inclined state by being operated, and the earth and sand intrusion prevention plate member is formed in a plurality in the longitudinal direction of the door body. It is characterized in that it is divided and can be independently rocked.

Further, when the door body is accommodated in the accommodation recess, the back surface thereof is substantially flush with the river bed, and the rocking fulcrum of the earth and sand intrusion prevention plate member is set below the river bed surface. At the same time, the sediment-preventing plate member is set to be substantially flush with the riverbed surface when the door is housed in the housing recess.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of a river rotary gate to which an embodiment of the rotary gate sediment intrusion prevention structure according to the present invention is applied, and FIG. 2 is a front view seen from the upstream side.

The illustrated rotary gate 1 comprises a gate body 10 horizontally provided between piers 2 and 2 arranged at a predetermined interval in the width direction of a river.

The gate body 10 includes support disks 11 at both ends,
11 are joined by a door body 12 having an arcuate cross-sectional shape (a cross-sectional shape surrounded by an arc having a diameter substantially equal to the outer circumference of the support disk 11 and having a predetermined angle range and a chord corresponding to the arc) (in other words, a door body). 12
The support disk 11 is attached to both ends of the door body 12), and the arc side of the door body 12 is the skin plate 12A and the chord side is the back surface 12B. Further, the upstream edge of the arcuate section is formed into a predetermined arc shape to form an overflow portion 12C capable of smooth overflow.

The support discs 11 at both ends are fitted in corresponding circular recesses 2A formed in the pier 2 and are rotatably supported by the rotary shaft 13 at the center position thereof, whereby the entire gate body 10 is horizontal. It is rotatable about an axis. A seal member 2B is provided between the outer peripheral edge of the support disk 11 and the inner wall of the recess 2A so as to prevent water leakage from the site.

Further, one support disk 11 is rotationally driven by a rotational drive mechanism (not shown) provided in the pier 2 to rotationally drive the gate main body 10 and can be fixed at an arbitrary angle.

At the riverbed (just below the central axis 13 of the gate body 10) corresponding to the location of the gate body 10, the door body 1
2, a storage recess 4 having a shape (bow shape) corresponding to 2 is formed, and the rotation of the gate body 10 causes the door body 12 to be positioned right below and the back surface 12B thereof to be horizontal as shown by an imaginary line in FIG. In this state, the door body 12 completely enters the accommodation recess 4, and the back surface 12B and the front and rear river beds 3 are flush with each other. Further, in this state, the accommodation recess 4
A predetermined space (gap 5) is provided between the arcuate surface of the above and the outer surface of the skin plate 12A of the door body 12.

In the rotary gate 1 constructed as described above, an arbitrary gate opening can be obtained by changing the position (angle) of the door body 12 by rotating the gate body 10. That is, as shown by an imaginary line in FIG. 3, the door body 12 is located right below and is housed in the housing recess 4 and its rear surface 12B is shown.
The state in which is horizontal and flush with the front and back riverbeds 3 is a fully open state that does not impede the water flow. From this state, the gate body 10 rotates clockwise in the figure, as shown by the solid line in FIG. By raising the door body 12, water can be stored on the upstream side of the river on the left side in FIG. If the water level is above the front edge of the door body 12 (overflow portion 12C), it overflows, and therefore the gate body 1
By adjusting the rotation angle of 0, the front edge of the door body 12 (overflow portion 1
By setting the position (height) of 2C), the flowing water amount (water level) can be adjusted.

Here, a predetermined space (gap 5) is set between the surface of the accommodation recess 4 of the riverbed 3 and the skin plate 12A of the door body 12 as described above. There is a possibility that boulders and earth and sand that have been washed away from the invasion may interfere with the rotation of the gate body 10. For example, when boulders or earth and sand enter this gap 5 when fully opened, there is a high possibility that the gate body 10 will become unrotatable due to being caught by the rotation of the gate body 10 particularly in the closing direction.

In order to prevent boulders and earth and sand from entering the gap 5 between the accommodation recess 4 and the door body 12, the earth and sand are provided on the upstream side of the door body 12 over the entire longitudinal direction of the door body 12. A sand and sand intrusion prevention plate 6 as an intrusion prevention plate member is provided.

As shown in FIG. 3 which is an enlarged cross-sectional view of the relevant portion, the sediment intrusion prevention plate 6 is provided with a support recess 31 formed adjacent to the storage recess 4 on the upstream side of the storage recess 4 of the river bed 3.
The support bracket 62 disposed inside the support pin 6 is parallel to the gate arrangement direction (the door body 12 arrangement direction) and is horizontal.
3 is supported so as to be swingable. Fulcrum pin 6
The position of 3 (that is, the rocking fulcrum position of the intrusion prevention plate 6) is
It is set lower than the surface of the riverbed 3 by a predetermined amount. FIG.
The middle 12D is a seal rubber disposed along the longitudinal direction in the vicinity of the rear edge of the skin plate 12A of the door body 12, and is pressed against the surface of the accommodation recess 4 to prevent water leakage from the rear edge of the door body 12. To prevent.

The sediment intrusion prevention plate 6 in this example is divided into a plurality of unit plates 61 in the gate direction (that is, the longitudinal direction of the door body 12), and these unit plates 61 are arranged in series. As shown in FIG. 4 which is an AA arrow view of FIG. 3, a boss 61A is projectingly provided on the inner surface side (door body 12 side) near both ends thereof, and the boss 61A is bifurcated. The fulcrum pin 6 that is sandwiched by the bracket 62 and penetrates both
3 is swingably mounted and supported.
A gap having a predetermined interval is formed between the end faces of the unit plates 61, and the gap is sealed by the seal material 64 attached to the end face of one of the unit plates 61 to prevent water leakage. ing. Also, the unit plate 6 adjacent to the pier 2
Similarly, between the side end surface of 1 and the side surface of the pier 2, the sealing material 64
Sealed by. The earth and sand intrusion prevention plate 6 does not necessarily have to be divided into a plurality of unit plates 61 as in this example, but may be integrally formed. However, in consideration of an error (irregularities) in the longitudinal direction of the outer peripheral surface of the door body 12, etc., the unit plate 61 as in this example.
Is divided into the outer peripheral surface of the door body 12 (skin plate 12
This is advantageous in terms of followability with respect to A).

The width of the earth and sand intrusion prevention plate 6 and the position of the fulcrum pin 63, which is the swinging fulcrum thereof, are set such that the gate is fully opened and the rear surface 12B of the door body 12 is as shown in the enlarged sectional view of FIG. In a state where the riverbed 3 is flush with the riverbed 3, the front end of the door 12 abuts the arc-shaped overflow 12C of the front edge of the door 12, and further downward swinging (clockwise in the figure) is restricted. The top surface of the earth and sand intrusion prevention plate 6 is flush with the back surface 12B of the door body 12 and the riverbed 3 (horizontal), and when the door body 12 rotates to the closing side (clockwise in the figure), the tip thereof is the door body. It is pushed up by the overflow portion 12C and the skin plate 12A of 12 and oscillates counterclockwise in the drawing, and leans against the door body 12 to form a predetermined angle as shown in FIG. This angle is set so as not to fall to the opposite side (left side in the figure). Incidentally, in order to prevent the device from falling over to the opposite side, it is possible to prevent it from swinging counterclockwise or more vertically by a chain or the like.

The tip edge portion of the earth and sand intrusion prevention plate 6 which comes into contact with the door body 12 is formed in an arc shape, and can be smoothly rocked by the outer peripheral surface (skin plate 12A) of the door body 12. In addition, the rear edge (upstream edge) of the sediment intrusion prevention plate 6 has its swing center (position of the fulcrum pin 63).
Is formed in an arc shape with the center as the center, and the upstream side seal 31 provided in the upstream riverbed 3 is provided at the arc-shaped rear end edge 61A.
Is in contact.

The upstream seal 31 is horizontally arranged by a pressing plate 32 whose upper surface is flush with the riverbed 3, and its tip is pressed against the arc-shaped rear edge 61A of the earth and sand intrusion prevention plate 6. There is. As a result, the earth and sand flowing from the upstream side are prevented from entering the support recess 31, and the entering earth and sand do not hinder the free rocking of the earth and sand intrusion prevention plate 6. Is.

Earth and sand intrusion prevention plate 6 constructed as described above
Acts to completely prevent boulders and earth and sand flowing from the upstream side from entering the gap 5 between the accommodation recess 4 and the skin plate 12A as described below. That is, when the gate shown in FIG. 4 is open, the earth and sand intrusion prevention plate 6 has the upper surface thereof flush with the river bed 3 and covers the gap 5 between the door body 12 and the accommodation recess 4, and the rock 5 is rolled into the gap 5. And prevent the intrusion of dirt. On the other hand, in the gate closed state in which the door body 12 is erected as shown in FIG. 3, the tip of the earth and sand intrusion prevention plate 6 abuts the outer peripheral surface (skin plate 12A) of the door body 12 and swings in conjunction with the rotation of the door body 12. Then, it stands up and covers the gap 5 between the door body 12 and the accommodation recess 4 to prevent boulders and earth and sand from entering the gap 5. As described above, according to the present configuration, it is possible to more reliably prevent a defect caused by biting boulders or earth and sand that have entered the gap 5 between the door body 12 and the housing recess 4 and to perform stable operation. .

In the above example, the gate body 10 according to the present invention is used.
Is a door 12 having an arcuate cross-section with support disks 11 and 11 at both ends.
The present invention is applied to a gate provided with a housing recess 4 that houses the door body 12 in the riverbed, while the door body 12 is not limited to an arcuate sectional shape. Also, the present invention may be applied to a configuration in which it does not rotate but only swings within a required range.

[0026]

As described above, according to the structure for preventing intrusion of sediment of the rotary gate according to the present invention, the upstream opening of the gap between the outer peripheral surface of the door body and the surface of the accommodating recess of the river bed is formed. ,
A plate-shaped member for preventing intrusion of sand and sand that is pivotally attached to the upstream riverbed at the edge can block the door regardless of the angle of the door, and can prevent rocks and sediment from entering the gap. It is a thing. Therefore, it is possible to install in the middle stream region of the river without the rocks and the earth and sand clogged between the accommodation recess and the skin plate of the door to prevent the rotation of the gate body.

Further, since the earth and sand preventive plate member is divided into a plurality of parts in the longitudinal direction of the door body and can be independently rocked, each of the divided members has an arc-shaped outer peripheral surface. It swings in accordance with the unevenness of No. 1 and the gap is less generated, and the effect of preventing the intrusion of earth and sand is increased.

Further, when the door body is accommodated in the accommodating recess, the back surface thereof is substantially flush with the river bed, and the rocking fulcrum of the plate member for preventing intrusion of sediment is set below the surface of the river bed and intrudes into the sediment. Since the prevention plate member is set to be substantially flush with the riverbed when the door is housed in the housing recess, the water flow resistance at the time of opening the gate is reduced and the gate part Sediment accumulation is also reduced.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an embodiment of a rotary gate for a river to which a structure for preventing sediment intrusion of a rotary gate according to the present invention is applied.

FIG. 2 is a front view seen from the upstream side.

FIG. 3 is an enlarged cross-sectional view of a part of the structure for preventing intrusion of earth and sand in a gate closed state.

FIG. 4 is a view as viewed in the direction of arrows AA in FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a portion for preventing intrusion of earth and sand when the gate is open.

FIG. 6 is a cross-sectional view showing a roller gate as a conventional example.

FIG. 7 is a sectional view of a rotary gate as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating gate 2 Pier (supporting pillar member) 3 Riverbed 4 Storage recess 5 Gap 6 Sediment intrusion prevention plate (sediment intrusion prevention plate member) 10 Gate body 11 Support disk 12 Door body 12A Skin plate (arc-shaped outer peripheral surface) 12B Rear surface 13 Rotation axis (horizontal axis) 63 Support point pin (swing support point)

Claims (3)

[Claims] 1. A gate body comprising a door body whose outer peripheral surface is arcuately installed between a pair of support discs, the door body being horizontal, and rotatable about a horizontal axis to a support pillar member through the support disc. In addition, in the rotary gate which is fixedly supported at an arbitrary angle and has a storage recess capable of accommodating the door body in a corresponding river bed, the door is provided in the river bed upstream of the storage recess. A plate-like member for preventing intrusion of sand and sand is pivotally attached to the edge of the entire body in a swingable manner, and the other edge interferes with the movement area of the door body. The plate-like member for preventing sediment intrusion covers a gap between the door body and the accommodation recess in a state where the door body is accommodated in the accommodation recess, and the door body extends from the accommodation recess to the riverbed surface. When it projects upward, its tip comes into contact with the arcuate outer peripheral surface of the door body and the rocking operation is performed. A structure for preventing intrusion of sediment of a rotary gate, which is constructed so as to cover a gap between the door body and the accommodating recess in an inclined state. 2. The rotating member according to claim 1, wherein the earth and sand intrusion preventing plate member is divided into a plurality of parts in the longitudinal direction of the door body and is configured to be independently swingable. Sediment intrusion prevention structure for the gate. 3. A back surface of the door body, when housed in the housing recess, is substantially flush with the river bed, and a rocking fulcrum of the plate member for preventing sediment intrusion is set below the river bed surface. At the same time, the sediment-preventing plate member is set to be substantially flush with the riverbed surface when the door is housed in the housing recess. The structure of the rotary gate described in 2 for preventing sediment intrusion.