JP4400916B2 - Pneumatic undulation gate - Google Patents

Description

This invention is a type of undulation gate used for the purpose of hoisting or discharging water flowing in a water channel by allowing the door body to stand up or lie down freely by a rotation center provided at the bottom of the water channel, and is a steel plate door. If compressed air is fed into a pillow-shaped air bag located at the base of the body on the downstream side from an air operating device on land, the air bag expands and the door body rises. It is a pneumatic hoisting gate in which the air bag shrinks flatly when the air with pressure is discharged from the bag so that the door body falls down, and the upstream edge is anchored to the bottom of the water channel by anchor bolts and presser plates. The present invention relates to a pneumatic hoisting gate of the type in which the lower end of the upstream surface of the door body is fixedly attached to the downstream edge of the anchoring plate made of rubberized cloth, and the door body is tethered to the bottom of the water channel so that it can be raised and lowered.

This type of pneumatic undulation gate has a lower degree of processing on both the door body and the door, and is easier to install than a undulation gate of the type in which the bearing of the door body is connected to the bearing at the bottom of the waterway by a rotating shaft. It is economical.
In addition, the air bag that supports the door body in a pillow shape located at the base of the downstream side of the door body distributes the entire width of the gate to support the load. The principal strength requirement is bending stiffness to counter the vertical bending moment that is zero and is the largest within the range supported by the bladder. Therefore, the door body may be a simple structure such as a steel plate or a ribbed steel plate in which an elongated steel plate is welded to the upstream surface of the steel plate in the flow direction.

However, in this type of pneumatic undulation gate, if the air bag is kept inflating, the door body will continue to stand up, and the center of gravity will eventually move upstream beyond the anchoring plate fixing position. However, there is a problem that the door body does not fall down.
Therefore, an appropriate position above the air bag on the downstream surface of the door body is in contact with the other end of the rubber-stretch cloth retaining band, which is fixed at one end with anchor bolts and presser plates installed on the concrete downstream of the air bag. By fixing with a bolt and a presser plate, when the door body stands up to a predetermined posture, the door body is stopped by the tension acting on the retaining band.
Furthermore, in this type of pneumatic undulation gate, the air bag made of rubberized cloth and the retaining band are damaged by the flowing driftwood and rolling stones, so it is necessary to be configured to be always protected under the steel plate door body. .
Nothing in particular

By the way, the condition that the undulation gate rises and falls in a state where the air bag and the detention belt are always protected under the steel plate door body is not simple, the size of the air bag and the attachment position of the detention belt This adjustment is a task that designers always struggle with.
For pneumatic undulation gates, the larger the air bag, the lower the internal air pressure required to support the load, and the lower value is sufficient. It is inexpensive, and the radius of the folded part of the three sides to be closed is small, so the storage space for the air bag to be secured on the upper side of the foundation concrete at the bottom of the door body when lying down is advantageous. is there.

However, if the air bag becomes too large, the retaining band disposed on the downstream side of the air bag becomes too long, and a problem occurs in which a part of the retaining band comes out downstream from the lower portion of the door body when lying down. Further, if the position of attachment to the door downstream side of the retaining band is too close to the air bag, there will be a problem that the door body attaching part of the retaining band crushes and damages part of the air bag when lying down. In other words, since the size of the air bag and the length of the retaining band that allow an appropriate internal pressure are mutually intertwined, the appropriate size of the air bag is selected to harmonize the air bag and the retaining band. It is an important design issue to fit in the door pocket.
In particular, when the effective height is 0.8 m or less, and when the effective height is 3.0 m or more, there are cases where an appropriate size of the air bag cannot be selected.
Therefore, in order to expand the application range of the pneumatic undulation gate, there has been a demand for a technique for ensuring that the air bag and the retaining band are always protected under the door made of steel plate.
In addition, when the tether plate is attached at a position that follows the lower end of the upstream surface of the steel plate door body, the thickness of the tether plate and the holding plate protrudes from 40 mm to 80 mm larger than the upstream surface of the door body, so that the water that flows down The problem that the undulation and the fixing part of the tether were easily damaged was not solved.

In order to solve this problem, the pneumatic undulation gate according to the present invention employs a steel plate door body in which the upper steel plate and the lower steel plate are coupled with a slight shift. That is, the lower steel plate fixed with the anchor plate by the bolt and the holding plate along the lower end of the upstream surface is stopped in the middle of the required height of the door body, and the upper steel plate extending to the required height of the door body is stacked on the upstream surface. The two are combined into a single body, and the strength is such that it can withstand the bending moment caused by the load as a whole. It was decided to attach to the part just above the upper end of the steel plate.

In this way, since the air bag which is pushed by the downstream surface of the lower steel plate when collapsed and shrunk into a flat quadrilateral is not directly crushed by the door body attachment part of the detention belt, a larger air bag than before It became possible to reduce the minimum effective height of the door to about 0.3 m and raise the maximum to about 4 m.

In addition, the protrusion on the upstream surface of the lower steel plate of the attachment part of the tether plate is alleviated by the thickness of the upper steel plate, so if the thickness of the upper steel plate is equal to the thickness of the door body attachment part of the tether plate, This also reduces the risk that the flowing water rips in this part, or that the door body mounting portion of the tether plate is damaged by the rolling stones that flow with the water.

By the way, when both the lower steel plate and the upper steel plate have the structurally necessary thickness as described above, the door body has excessive strength in terms of strength, but the weight is also very large, which is uneconomical. Not only is handling difficult.
Therefore, we decided to reduce the weight of the large door by reducing the thickness of the upper steel plate.
That is, a long steel plate that extends from just above the tether plate mounting portion on the upstream surface of the lower steel plate to the top edge of the door body is welded and attached in the direction perpendicular to the upstream surface of the lower steel plate in the direction of running water to form a vertical rib. The upper steel plate of the required thickness is welded and attached to the vertical rib with the vertical ribs divided in the width direction at the required position, and at the same time, perpendicular to the vertical rib connecting the two at the upper end of the lower steel plate and the lower end of the upper steel plate A long and narrow steel plate is arranged to form a transverse rib.
As a result, the door cross section is a box-shaped cross section with a lower steel plate, an upper steel plate and a horizontal rib in the vertical cross section, and a continuous box cross section with the lower steel plate, the upper steel plate and the vertical rib in the horizontal cross section. Therefore, the door is lightened by the amount that is hollow.

Embodiments of a pneumatic undulation gate according to the present invention will be described below in detail with reference to the drawings.
1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5 show one embodiment of the pneumatic undulation gate of the present invention, FIG. 1 is a rear view of the pneumatic undulation gate, and FIG. 2 is a sectional view. FIG. 3 is a sectional view showing a lying state, FIG. 4 is an explanatory view of a door body, and FIG. 5 is an explanatory view of an air bag.

1, 2, and 3, anchor bolts 2 arranged across the water channel on the concrete upper surface 1 at the bottom of the water channel having a rectangular cross section are closed by the main presser plate 3 and three sides are closed and one side is opened. Three of the edges 5 and 6 of the open side of the air bag 4 made of rubberized cloth made into a flat rectangle and the upstream edge 8 of the anchoring plate 7 made of rubberized cloth are joined together on the top surface 1 of the concrete at the bottom of the channel. By pressing, the open side of the air bag 4 is sealed, and at the same time, the air bag 4 and the anchoring plate 7 are fixed to the bottom of the water channel.
Instead of anchor bolts installed side by side across the bottom of a channel with a rectangular cross section, the main presser plate and tether plate are installed by bolts that are installed on anchor hardware installed across the bottom of the channel. By pressing firmly against the open side of the air bag, the air bag and the anchoring plate can be fixed to the upper surface of the concrete at the bottom of the water channel while sealing the open side of the air bag.

At the end of the edge 5 of the rubberized cloth below the open side of the air bag 4, there is a folded back fixing portion 10 at the edge which is protected by a resin rod 9 so that the bending radius of the reinforcing fiber is not too small. Yes, it is hung on the corner 11 on the downstream side of the groove-like portion on the upstream side of the upper surface 1 of the concrete at the bottom of the water channel so that it is not pulled out from a predetermined position by the tension acting on the edge 5.

Further, at the end of the upstream edge 8 of the anchoring plate 7, there is an edge fixing portion 13 which is protected by a resin rod 12 so that the bending radius of the reinforcing fiber is not too small, and upstream of the main presser plate 3. It hangs on the corner 14 of the side edge so that it is not pulled out from a predetermined position by the tension acting on the anchoring plate 7.

At the same time, at the edge of the edge 6 of the rubberized cloth above the open side of the air bag 4, the edge folding and fixing portion 16 protected by a resin rod 15 so that the bending radius of the reinforcing fiber is not excessively small. It is hung on the upstream side 17 of the folded fixing portion 13 at the end of the edge 8 on the upstream side of the anchoring plate 7 and is not pulled out from a predetermined position by the tension applied by the edge 6.
That is, the upstream edge 8 of the anchoring plate 7 and the upper edge 6 of the air bladder 4 are not pulled out from a predetermined position by the main presser plate 3 and the anchor bolt 2.

After being configured in this way, the main presser plate 3 is strongly pressed by the nut 47 screwed into the anchor bolt 2 against a total of three rubberized cloths of the tether plate 7 and the open side of the air bag 4. The air bag 4 and the tether plate 7 are fixed to the concrete upper surface 1 at the bottom of the water channel while sealing the open side of the air bag 4.

Next, the edge 18 on the downstream side of the tether plate 7 is fixed to a position following the lower end 20 of the semicircular cross section of the upstream surface of the lower steel plate 19 of the steel plate door by the presser plate 21 and the bolt 22, and the steel plate door The body is tethered to the upper surface 1 of the concrete at the bottom of the water channel by a tether plate 7 so as to be raised and lowered.
Also in this case, at the edge of the downstream edge 18 of the anchoring plate 7, there is a folded fixing portion 24 at the edge protected by the resin rod 23 so that the bending radius of the reinforcing fiber is not too small. So that it cannot be pulled out from a predetermined position due to the tension applied by.

If comprised in this way, since the lower end 20 of the lower steel plate 19 of the steel plate door body will be in a state of being placed on the air bag 4 at a position along the downstream edge of the main presser plate 3 of the air bag 4, If the air bag 4 expands, the lower steel plate 19 causes the entire steel plate door body to stand up. Conversely, if the air bag 4 contracts flatly, the steel plate door body will fall down.

As shown in FIG. 4, the steel plate door body has a female screw 48 fitted to the bolt 22 that fixes the anchoring plate 7 on the upstream surface at a position following the lower end 20 of the semicircular cross section, and is slightly smaller than the weir width. The lower steel plate 19 extended in a flat plane upward within the range of contact with the air bag 4 that supports the door body when the gate rises and falls, and the downstream surface of the lower steel plate 19 on the upstream side of the lower steel plate 19 The upper steel plate 25 extends upward while contacting the side surface, and reaches the position necessary to obtain the top end height of the door body through the bent portion 26 from the middle.
The lower steel plate 19 and the upper steel plate 25 are joined together by welding at the edge of the contact surface, and can resist a bending moment caused by a hydraulic load or the like.

Further, a cutout portion 28 for fixing the retaining band 27 is provided near the upper end of the lower steel plate 19, and a female screw 30 for a bolt 29 for attaching the retaining band 27 is provided at that portion of the upper steel plate 25.

The retaining band 27 is made of a rubber-stretched cloth having sufficient strength, and is anchored at one end by an anchor bolt 45 and a pressing plate 46 placed on the upper surface 31 of the concrete at an appropriate position downstream of the air bag 4 at the bottom of the water channel. The other end is fixed with a bolt 29 and a presser plate 32 at the position of the cut-out portion 28 for fixing the retaining band 27 in the vicinity of the upper end of the lower steel plate 19 of the upper steel plate 25 of the steel plate door body. When the door body stands up to a predetermined posture, it is stopped by the tension acting on the retaining band 27.

The retaining band 27 also has a reinforcing fiber folding fixing portion 34 protected at its end by a resin rod 33 so that the bending radius of the reinforcing fiber is not excessively small, and the tension at which the retaining band 27 acts. To prevent it from being pulled out from a predetermined position.

Since the thickness of the retaining band 27 and the holding plate 32 of the attaching portion of the retaining band 27 to the upper steel plate 25 of the steel plate door is not larger than the thickness of the lower steel plate 19, both dimensions are taken into consideration. As shown in FIG. 3, the air bag 4 is not crushed by the fixing portion of the retaining band 27 and damaged when lying down.
Similarly, the fixing portion of the retaining band 27 to the concrete upper surface 31 is lowered from the surroundings by the thickness of the retaining band 27 and the holding plate 46. Therefore, as shown in FIG. It will not be damaged by being crushed by the fixed part.

Next, the bending part 26 of the head part of the upper steel plate 25 of the steel plate door body guides the water that overflows to the downstream side when standing up, so that the water and the driftwood that flows down together with the air bag 4 or the retaining zone. Protect from hitting 27 mag. This situation is shown in FIG.
Further, as shown in FIG. 3, at the time of lying down, the bending portion 26 of the head of the upper steel plate 25 of the steel plate door body is supported by the support base 35, and the upper surface 1 of the concrete, the upper surface 31 of the concrete, and the steel plate Since the necessary space is secured by the stepped portion between the downstream surface of the lower steel plate 19 and the downstream surface of the upper steel plate 25, the air bag 4 and the retaining band 27 are not crushed by the steel door. .

Furthermore, at a position following the lower end 20 of the semicircular cross section of the upstream surface of the lower steel plate 19 of the steel plate door body, at the downstream edge 18 of the tether 7 attached to the lower steel plate 19 by the holding plate 21 and the bolt 22, Since a step substantially equal to the thickness of the tether plate 7 and the presser plate 21 is given to the upper steel plate 25 joined adjacently, there is almost no difference in height between them, and water and gravel flow down smoothly.

As shown in FIG. 5, the size of the open side of the air bag 4 made of rubberized cloth made in a flat rectangle is slightly smaller than the gate width, and when it expands in the direction perpendicular to this, the door made of steel plate The lower steel plate 19 and the upper steel plate 25 have sufficient dimensions to push up to a predetermined posture.
The rubberized cloth is continuously bent and closed on three sides other than the open side to be pressed by the main presser plate 3.
On the open side, the reinforcing fiber folding and fixing portion is protected by the rods 9 and 15 made of resin at the ends of the edges 5 and 6 of the two opposite rubberized cloths so that the bending radius of the reinforcing fiber is not too small. There are 10,16. Further, a hole 36 through which the anchor bolt 2 passes in parallel with the folded fixing portions 10 and 16 penetrates the edges 5 and 6 of the two rubberized cloths. A base 37 for taking in and out air is attached near the center of the lower width of the air bag 4.

With this configuration, the air pipe 38 connected to the base 37 at the bottom of the air bag 4 is led to land by burying it in the concrete of the water channel, etc., and the exhaust on-off valve 39 of the air operation device, the exhaust flow rate adjustment 1, 2, and 3 are connected to the valve 40, the exhaust discharge part 41, the air supply on / off valve 42, the air supply flow rate adjustment valve 43, and the air compressor 44.

After that, air is pressed into the air bag 4 from the air compressor 44 via the air supply flow rate adjustment valve 43, the air supply opening / closing valve 42, the air pipe 38, and the base 37, resulting in a steel plate door body. FIG. 2 is a cross-sectional view of the state where the upright is standing, and the bent portion 26 of the head of the upper steel plate 25 of the door body guides the overflowing water downstream so that the air bag 4 and the belt 27 are not hit. It is functioning.
FIG. 1 shows this state seen from the downstream side, and the air bag 4 supports the lower steel plate 19 of the steel plate door body over almost the entire width.
In the cut portion 28 near the upper end of the lower steel plate 19, the retaining band 27 is fixed to the upper steel plate 25 by bolts 29 and a presser plate 32.

On the other hand, the air compressor 44 is stopped, the air supply on / off valve 42 is closed, the exhaust on / off valve 39 is opened, and the air having the pressure inside the air bag 4 is controlled by the exhaust flow control valve 40. FIG. 3 is a cross-sectional view of a state in which the steel plate door body has completely fallen down as a result of being released from the exhaust emission part 41 into the atmosphere.
At this time, the thickness of the fixing portion of the retaining band 27 to the upper steel plate 25 by the bolt 29 and the holding plate 32 does not exceed the thickness of the lower steel plate 19. The parts are prevented from being crushed and damaged.

6, FIG. 7, FIG. 8, FIG. 9 and FIG. 10 show another embodiment of the pneumatic undulation gate according to the present invention, and FIG. 6 shows a standing state in a sectional view of the pneumatic undulation gate, FIG. 7 is a sectional view of a pneumatic undulation gate, showing a lying state, FIG. 8 is an explanatory view of a door body, showing an upstream surface, a side surface, and a longitudinal section, and FIG. 9 is an explanatory view of a door body, showing a downstream surface and a transverse section. FIG. 10 is an explanatory view of an air bag.
6 and 7, the anchor bolts 61 arranged side by side across the water channel in the groove-like portion 60 on the upstream side of the concrete upper surface 1 at the bottom of the water channel having a rectangular cross section are arranged on the downstream side of the main presser plate 62. The open edges 63, 6 of the rubber-filled air bag 4 made of a flat rectangle with three sides closed and one side open as well as the rubber-cloth-clothing tethers 7 By pressing together the three rubberized cloths of the upstream edge 8 against the concrete upper surface 1 at the bottom of the water channel, the open side of the air bag 4 is sealed, and at the same time, the air bag 4 and the tether 7 are connected to the upper surface of the concrete. Fix to 1.
At this time, since the downward protrusion 64 of the upstream edge of the main presser plate 62 is supported by the upstream portion of the groove-like portion 60, the pressing force of the main presser plate 62 by the nut 65 screwed into the anchor bolt 61 Can effectively press the edges 5, 6 and 8 of the three rubberized cloths by the protrusion 63 below the downstream edge of the main presser plate 62.

At the edge of the edge 5 of the rubberized cloth below the open side of the air bag 4, the reinforcing fiber folding and fixing portion 10 is protected by a resin rod 9 so that the bending radius of the reinforcing fiber is not excessively small. It is prevented from being pulled out from a predetermined position by the tension applied to the edge 11 of the rubberized cloth on the corner 11 on the downstream side of the groove-like portion 60 on the upstream side of the upper surface 1 of the concrete at the bottom of the water channel.
Further, at the edge of the upstream edge 8 of the anchoring plate 7, there is a reinforcing fixing portion 13 of the reinforcing fiber which is protected by the resin rod 12 so that the bending radius of the reinforcing fiber is not too small. It is hung on the upstream corner 66 of the protrusion 63 below the downstream edge so that the edge 8 of the anchoring plate 7 is not pulled out from a predetermined position by the acting tension.
At the same time, at the edge of the edge 6 of the rubberized cloth above the open side of the air bag 4, the reinforcing fiber folding and fixing portion 16 protected by a resin rod 15 so that the bending radius of the reinforcing fiber is not excessively small. The edge of the edge 8 on the upstream side of the anchoring plate 7 is hung on the upstream side 17 of the folding fixing portion 13 so that it is not pulled out from a predetermined position by the tension applied by the edge 6 of the rubberized cloth.
That is, the edge 6 of the rubberized cloth above the open side of the anchor plate 7 and the air bag 4 is not pulled out from a predetermined position by the projection 63 and the anchor bolt 61 that are below the downstream edge of the main presser plate 62. It becomes like this.

With this configuration, the nuts 65 screwed into the anchor bolts 61 are used to form protrusions 63 below the edge of the main retainer plate 62 on the downstream side, a total of 3 on the tether plate 7 and the open side of the air bag 4. The air bag 4 and the anchoring plate 7 are fixed to the concrete upper surface 1 at the bottom of the water channel while the open side of the air bag 4 is sealed by pressing strongly against a sheet of rubberized cloth.

Next, the downstream edge 18 of the tether plate 7 is fixed by a holding plate 21 and a bolt 22 at a position following the lower end 68 of the upstream surface of the lower steel plate 67 of the steel plate door body, and the steel plate door body is fixed by the tether plate 7. Tethered to the upper surface 1 of the concrete at the bottom of the waterway.
Also in this case, the edge 18 of the downstream edge 18 of the anchoring plate 7 has an edge folding fixing portion 24 protected by a resin rod 23 so that the bending radius of the reinforcing fiber is not excessively small, and the anchoring plate 7 acts. So that it is not pulled out from a predetermined position by the tension applied.

With this configuration, the lower end 68 of the lower steel plate 67 of the steel plate door body is placed on the air bag 4 at a position along the downstream side of the protrusion 63 at the downstream edge of the main presser plate 62. Since the air bag 4 is inflated, the lower steel plate 67 causes the entire steel plate door body to stand up. On the contrary, if the air bag contracts flatly, the steel plate door body will fall down.

Also in this embodiment, the size of the lower steel plate 67 is the size of the range in which the air bag 4 contacts when the door body stands and falls. Longitudinal ribs 69 are attached by welding a long and narrow steel plate extending from directly above the anchor plate attached at a position following the lower end 68 of the upstream surface and reaching the top end of the door body in a direction perpendicular to the lower steel plate 67 in the direction of running water. The width direction is divided into the vertical ribs 69 and welded to the vertical ribs 69 so as to maintain a slight distance from the lower steel plate 67 and extend upward from the attachment portion of the tether plate 7 by the bent portion 70. An upper steel plate 71 serving as the top of the body is provided.
An elongated steel plate that fills the gap between the upper surface of the lower steel plate 67 is placed at the lower end of the upper steel plate 71, and is welded to the upper steel plate 71, the lower steel plate 67, and the vertical rib 69 to form a lower horizontal rib 72.
If comprised in this way, in the lower end of the upper steel plate 71, since a level | step difference will arise between the upstream surface of the lower steel plate 67, and the upstream surface of the upper steel plate 71, it anchors with the upper surface of the main pressing plate 62 at the time of a door body fall. A large height difference can be prevented from occurring between the upper surface of the holding plate 21 that fixes the plate 7 to the upstream surface of the lower steel plate 67 and the upstream surface of the upper steel plate 71, and water and gravel flow smoothly. be able to.

Further, an elongated steel plate that fills the gap with the downstream surface of the upper steel plate 71 is placed at the upper end of the lower steel plate 67 and welded to the upper steel plate 71, the lower steel plate 67, and the vertical rib 69 to form the upper horizontal rib 73. .

With this configuration, there is a step between the downstream surface of the lower steel plate 67 and the downstream surface of the upper steel plate 71 at the upper end of the lower steel plate 67, so that the wire is retained on the downstream surface of the upper steel plate 71 at a position immediately above the lower steel plate 67. When one end of the belt 27 is attached by the bolt 29 and the presser plate 32, the door attachment portion of the retaining belt 27 does not protrude from the steel plate door.
This is the same in the case of being attached to the retaining band 27 and the upper surface 31 of the concrete, and the anchoring band 45 and the holding plate 46 provided on the upper surface 31 of the concrete that is one step lower than the concrete surface supporting the air bag 4 are used. The other end of 27 is fixed.
In this case as well, the edge end of the retaining band 27 is provided with a bent fixing portion 34 at the edge which is protected by a resin rod 33 so that the bending radius of the reinforcing fiber is not excessively small.

As shown in FIGS. 8 and 9, the steel plate door body has a female screw 74 fitted to the bolt 22 for fixing the tether 7 at a position along the lower end 68 of the upstream surface, and a width direction slightly smaller than the weir width. The lower steel plate 67 having a length necessary for the air bag 4 to come in contact with the air bag 4 to support the door body when the gate stands and falls, and the attachment portion of the anchor plate 7 on the upstream surface of the lower steel plate 67 are immediately Longitudinal ribs 69 that extend from the top to the top edge of the door body and are welded and attached in a direction perpendicular to the upstream surface of the lower steel plate 67 in the direction of running water. In addition, the longitudinal direction is divided into the longitudinal ribs 69. The upper steel plate 71 is welded to the longitudinal ribs 69 and extends upward while maintaining a slight distance from the lower steel plate 67. The upper steel plate 71 has the bent portion 70 as the top edge of the door body. Weld in the gap between the lower steel plates 67 And a lower horizontal rib 72, at the upper end of the lower steel plate 67, formed by the transverse rib 73 on which is welded pay the gap of the lower steel plate 67 and the upper steel plate 71.

As shown in section BB in FIG. 8, in the longitudinal section of the door body, the lower steel plate 67, the upper steel plate 71, the lower horizontal rib 72, and the upper horizontal rib 73 form a box-shaped cross section.
Further, as shown in a cross section DD of FIG. 9, the cross section of the door body forms a box-shaped cross section in which the lower steel plate 67, the upper steel plate 71, and the vertical rib 69 are continuous.
Then, there is a female screw 75 that is aligned with the bolt 29 for fixing the retaining band 27 just above the upper end of the lower steel plate 67 of the upper steel plate 71.

As shown in FIG. 10, the air bag 4 is manufactured by a flat rectangle made of rubberized cloth with three sides closed and one side opened, and the size of the opened side is slightly smaller than the gate width and in a direction perpendicular thereto. Has a dimension sufficient to push up the door made of steel plate to a predetermined posture when expanded.
On the open side, the reinforcing fiber folding and fixing portion is protected by the rods 9 and 15 made of resin at the edges of the edges 5 and 6 of the two rubberized cloths facing each other so that the bending radius of the reinforcing fiber is not too small. There are 10,16.
A base 37 for taking in and out air is attached near the center of the lower width of the air bag 4.

With this configuration, the air pipe 38 connected to the base 37 at the bottom of the air bag 4 is led to land by burying it in the concrete of the water channel, etc., and the exhaust on-off valve 39 of the air operation device, the exhaust flow rate adjustment 6 and 7 are connected to the valve 40, the exhaust discharge section 41, the supply air on-off valve 42, the air supply flow rate adjustment valve 43, and the air compressor 44.

After that, air is pressed into the air bag 4 from the air compressor 44 via the air supply flow rate adjustment valve 43, the air supply opening / closing valve 42, the air pipe 38, and the base 37, resulting in a steel plate door body. FIG. 6 is a cross-sectional view of the state in which the upright side is raised, and the bent portion 70 of the head of the upper steel plate 71 of the door body guides the overflowing water downstream and does not hit the air bag 4 or the retaining band 27. It protects.

On the other hand, the air compressor 44 is stopped, the air supply on / off valve 42 is closed, the exhaust on / off valve 39 is opened, and the air having the pressure inside the air bag 4 is controlled by the exhaust flow control valve 40. FIG. 7 is a cross-sectional view of a state in which the steel plate door body has completely fallen down as a result of being released from the exhaust emission part 41 into the atmosphere.
At this time, the portion where the retaining band 27 is fixed to the upper steel plate 71 by the bolt 29 and the holding plate 32 does not protrude from the surface of the lower steel plate 67 due to the step between the surfaces of the upper steel plate 71 and the lower steel plate 19 in this part. The air bag 4 is not crushed and damaged by the presser plate 32.
Further, in the portion where the tether plate 7 is fixed to the lower steel plate 67, the surface of the main presser plate 62, the surface of the presser plate 21, and the surface of the upper steel plate 71 due to the steps on the surfaces of the upper steel plate 71 and the lower steel plate 67. These three surfaces are almost the same height, and water and gravel flow down smoothly.

Also in this embodiment, the anchor bolt, main presser plate, air bag, tether plate, lower steel plate, upper steel plate, retaining band, etc., which are the main components, are the same as the first embodiment, and the lower steel plate and The concept of utilizing the step formed on the surface of the upper steel plate is exactly the same.
In the first embodiment, the steel plates are simply overlapped, so that the economy that the weight of the steel door is large and the economy with a small amount of processing coexist, but a small pneumatic undulation with an effective height of 1 m or less. Useful for gates.
In contrast, in this embodiment, since the lower steel plate and the upper steel plate are not directly stacked and the hollow structure is formed by interposing the vertical ribs and the upper and lower horizontal ribs, the uneconomical increase in the amount of processing and the economical efficiency of reducing the weight. Although coexisting, it is effective when used for a large pneumatic relief gate with an effective height of 3 m or more.

The pneumatic hoisting gate of the present invention is always provided with an air bag for hoisting a steel plate door body that is moistened to the bottom of a water channel with a mooring plate made of rubber-drawn cloth and a hoisting belt for limiting the standing height. When the door body height is less than 0.8m, or when the door body height exceeds 3m, it is difficult to set the size of the air bag to be protected by the door body. Since it does not protrude from the downstream surface of the lower steel plate, the length of the retaining band can be designed to be as short as possible. In the case of a small gate, the lower limit of the door height can be lowered to about 0.3 m. In the case of a large gate, the upper limit of the door height can be raised to about 4 m.
That is, the application range of this type of pneumatic undulation gate can be expanded from 0.3 m to 4.0 m where the door body height is conventionally limited to 0.8 m to 3.0 m.
In addition, at the part where the anchor plate is attached to the lower end of the door body, the upper surface of the main presser plate, the upper surface of the anchor plate, the upper surface of the presser plate, and the upper surface of the upper steel plate are designed and manufactured so that there is no significant unevenness when lying down. As a result, it became possible to create a gate with a smooth flow of water and gravel and less undulations.

1 is a rear view of a pneumatic undulation gate according to an embodiment of the present invention in a state where the pneumatic undulation gate is raised. It is sectional drawing of the state which the pneumatic type relief gate stood up. It is sectional drawing of the state which the pneumatic type relief gate fell down. It is explanatory drawing of a door body. It is explanatory drawing of an air bag. It is sectional drawing of the state which showed the other Example of the pneumatic undulation gate of this invention, and the undulation gate stood up. It is sectional drawing of the state which the pneumatic type relief gate fell down. It is explanatory drawing of a door body, The upstream surface, the side surface, and a longitudinal section are shown. It is explanatory drawing of a door body, and shows the downstream surface, bottom face, and cross section. It is explanatory drawing of an air bag.

DESCRIPTION OF SYMBOLS 1 Concrete top surface 2 Anchor bolt 3 Main presser plate 4 Air bag 5 Edge 6 Edge 7 Anchor plate 8 Edge 9 Rod 10 Folding fixing part 11 Corner 12 Rod 13 Folding fixing part 14 Corner 15 Rod 16 Folding fixing part 17 Upstream side 18 Edge 19 Lower steel plate 20 Lower end 21 Presser plate 22 Bolt 23 Rod 24 Folding fixing part 25 Upper steel plate 26 Bending part 27 Draw band 28 Cutting part 29 Bolt 30 Female screw 31 Concrete upper surface 32 Presser plate 33 Rod 34 Folding fixing part 35 Support stand 36 Hole 37 Base 38 Air pipe 39 Exhaust on-off valve 40 Exhaust flow control valve 41 Exhaust discharge part 42 Supply air on-off valve 43 Supply air flow control valve 44 Air compressor 45 Anchor bolt 46 Presser plate 47 Nut 48 Female thread 60 Groove Portion 61 Anchor bolt 62 Main presser plate 63 Protrusion 64 Protrusion 65 Nut 6 Angle 67 lower steel plate 68 the lower end 69 longitudinal ribs 70 the bent portion 71 the upper steel plate 72 the lower lateral rib 73 upper horizontal rib 74 internal thread 75 female thread

Claims (5)

Air made of rubberized cloth made into a flat rectangle with three sides closed and one side open on the top surface of concrete at the bottom of the channel, according to the arrangement of anchor bolts installed side by side across the bottom of the channel with a rectangular cross section Place the open side of the bag and the upstream edge of the tether made of rubberized cloth.
Furthermore, place a main presser plate with bolt holes opened in accordance with the arrangement of the anchor bolts, and press the main presser plate firmly against the open side of the tether plate and air bag with a nut screwed into the anchor bolt. The air bag and the anchoring plate are fixed to the upper surface of the concrete at the bottom of the water channel while sealing the open side of the air bag.
Position where the downstream edge of this tether plate follows the lower end on the upstream side of the door made of steel plate having a width direction slightly smaller than the weir width and a length necessary for securing the standing height required for standing The door body is anchored to the bottom of the water channel so as to be raised and lowered, and at the same time, water leakage between the upper surface of the concrete and the door body is prevented.
In addition, the other end of the rubber-stretch cloth retaining band with one end fixed to the concrete at an appropriate position downstream of the air bag at the bottom of the waterway and fixed to the downstream of the door body By fixing with bolts and presser plates at an appropriate position above the air bag on the surface, when the door body stands up to a predetermined posture, the door body is stopped by the tension acting on this detention belt To do.
With this configuration, if an air tube is connected to the air bag from the air operating device on land, and compressed air is sent into the air bag from the air operating device, the air bag expands and the door body is raised. On the contrary, in the pneumatic hoisting gate where the air bag contracts flatly when the air having pressure is discharged from the air bag and the door body falls down,
The steel of the door body, rigidly fixed to anchoring plate by bolts and the press plate at a position accompany upstream of the lower end, of the range gate is standing, the air bag is in contact to support the door body when to lodging, door The upper surface of the lower steel plate and the upstream surface of the lower steel plate are contacted with the upstream surface of the lower steel plate, immediately above and above the position where the upstream steel plate of the lower steel plate is fixed. It is composed of an upper steel plate that extends upward and reaches the top height of the door body through an appropriate curved part on the way, and extends to the required height of the door body . The lower steel plate and the upper steel plate are welded at the edge of the contact surface. or, by, for example, driving a pin in the middle portion, by which is adapted to counteract the bending moment due to water pressure load such as one body, upstream of the lower steel sheet at a position accompany the lower end of the upstream side surface of the door body amount corresponding stepped green thickness of the upper steel sheet surface on the side Mounting portion of the anchor plate so as not to protrude from the steel of the door body Te, the downstream-side surface of the door body, in a position for attaching the upper dead-end zone than the air bag contact surface on the downstream side of the upper steel plate A pneumatic undulation gate is characterized in that a step is generated by the thickness of the lower steel plate so that the door body mounting portion of the retaining band does not protrude from the steel door body . In the pneumatic undulation gate according to claim 1, in a position where the upper steel plate and the lower steel plate overlap, a part of the upper steel plate is cut out to expose a part of the upstream surface of the lower steel plate, and between the cutting edge of the upper steel plate. Kuozho undulation gate, characterized by improving the one body of the upper and lower steel plates by welding. In the pneumatic undulation gate according to claim 1, in a position where the upper steel plate and the lower steel plate overlap, a part of the lower steel plate is cut out to expose a part of the downstream surface of the upper steel plate, and between the cutting edge of the lower steel plate. Kushou-type undulation gate, which has been joined by welding to improve the one body of the upper and lower steel plates and then backfilled the cut steel plates to eliminate the unevenness of the contact surface between the door body and the air bag . 2. A pneumatic undulation gate according to claim 1 , wherein a steel plate at a position suitable for attachment of a retaining band near the upper end of the lower steel plate is cut out in a necessary minimum range, a part of the downstream surface of the upper steel plate is exposed, and a cutting edge of the lower steel plate To improve the one body of the upper steel plate and the lower steel plate, and at the same time, the uncut part near the upper end of the lower steel plate is crushed by the attachment part of the detention belt when lying down A pneumatic relief gate characterized by protection from the surroundings so that it will not be damaged. 2. The pneumatic undulation gate according to claim 1 , wherein an elongated steel plate extending from an upper portion of an upstream surface of a lower steel plate and extending upward to the top of the door body is placed in a posture perpendicular to the surface. A vertical rib is formed by welding in a direction parallel to the flow of the steel sheet, and in the range where this vertical rib exists, the width direction is divided into the vertical ribs and welded to the vertical ribs to maintain a slight distance from the lower steel plate. While extending the upper part of the tether plate, the upper and lower steel plates are placed in a position that fills the gap between the lower end of the upper steel plate and the upstream surface of the lower steel plate that reaches the top edge of the door body through an appropriate curved surface. In parallel, welded to the vertical ribs to form the lower horizontal ribs. In addition, a long and narrow steel plate is placed in a position that fills the gap between the upper end of the lower steel plate and the downstream surface of the upper steel plate, and welded to the vertical ribs as well as the upper and lower steel plates. Longitudinal cross-sectional view of the door body by joining the upper horizontal ribs The upper steel plate, the lower steel plate, and the upper and lower horizontal ribs form a box-shaped cross section, and at the same time, the upper steel plate, the lower steel plate, and the vertical ribs are closed to form a continuous box-shaped cross section in the door cross-sectional view. Pneumatic undulation gate characterized by the fact that

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