JP2018096190A - Non-powered sluice gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auto gate which has openable/closable door bodies provided on an outflow side opening of a waterway frame body, allows the door bodies at the opening of the waterway frame body to be slightly closed or adequately opened at all times, meanwhile, when a water level on a main stream side greatly increases, the door bodies are pressurized by a water pressure on the main stream side of which the water level greatly increases to block an outflow port of the flowing water passage end, and to automatically block inflow of the flowing water on the main stream side to the flowing water passage (branch stream) side.SOLUTION: There is provided a non-powered sluice gate in which two door bodies 1 opened from a branch stream side to a main stream side are mounted by smooth hinge means 2 on vertical girders on both sides of an opening end face frame 26 of an outflow port of a rectangular sluice pipe KK provided on a flowing water passage end, so-called, an opening of a culvert, on the main stream side, in a so-called double door manner, rope bodies 5 and 5 having the same length are smoothly connected in series between a neighbour point B' being a portion farthermost from the position of the hinge means 2 on the upper portion of the rear face of the door bodies 1 and a neighbour point A in the center of the lower surface of the opening end face frame 26 of the rectangular sluice pipe KK by rope body connection means 7, and a weight 8 is suspended to the connection means 7.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an outflow of a non-powered water control gate (hereinafter referred to as an autogate), in particular, a rectangular parallelepiped pipe provided at the end of a water flow channel, that is, an opening to the main river of a so-called culvert. The opening is lightly closed with a door that is always closed to allow a small amount of running water to flow from the tributary side to the main river side. Open and let it flow out reasonably, and by pressing the door body from the main river side to the end face of the outflow opening of the rectangular parallelepiped pipe due to an increase in water pressure due to an abnormal rise in the water level on the main river side, The present invention relates to an auto gate that blocks the outflow opening and prevents backflow of running water to the tributary side due to an abnormal rise in the water level on the main river side.

A door body that can be opened and closed is provided at the outlet side opening of the water channel frame body at the end of the conventional water channel, and the door body always opens the opening of the water channel appropriately, while the water level on the main river side is greatly increased. When the water level rises, the water pressure on the main river side, where the water level has risen significantly, presses the door body to close the outlet at the end of the water channel, and the water flow to the water channel (branch river) on the main river side As an auto gate for automatically blocking the inflow, for example, there is a balance gate (see actual open 1-111729) as shown in a schematic side view in FIG.

The water control door 17 as the autogate B shown in FIG. 25 has a door body 17A that opens and closes a vertical opening end face 15CC of the outlet 15C of the culvert 15B at the end of the flow channel 15 as an outlet 15C of the culvert 15B. The horizontal shaft 17C disposed above the opening end face 15CC is provided via a mounting portion 17B, and the horizontal shaft 17C is provided with a fixture 17D so that the door body 17A and the horizontal shaft 17C are substantially balanced. A weight 17E is provided.

This water control door 17 usually closes the door body 17A horizontally by the door body 17A by lightly closing the vertical opening end face 15CC of the outlet 15C of the culvert 15B, or by the water flow of the flow channel 15 on the tributary side 2. Rotate clockwise around 17C, open the opening end face 15CC of the outlet 15C and let it flow out to the main river side 1. On the other hand, if the water level on the main river side rises above the water level on the tributary side, the water level difference between the two The outside pressure of the door body 17A is pressed by the water pressure based on the above, and the door body 17A is rotated counterclockwise around the horizontal shaft 17C, and the opening end face 15CC is closed by the inner side surface of the door body 17A. To prevent backflow to the tributary side 2

Next, the conventional float type flap gate 18 (refer to Japanese Utility Model Publication No. 4-37947) shown in the schematic longitudinal side view of FIG. 26 has an opening end face 15CC of the outlet 15C of the culvert 15B at the end of the flowing water path 15, The lower part from the upper part is formed in an inclined shape that recedes to the tributary side 2 (right side in FIG. 26), the bracket 19 is raised upward from the upper side of the end of the culvert 15B, and the main river side 1 of the bracket 19 (FIG. 26). Then, the connecting link 18D is suspended from the extension to the left side so as to be swingable by the support shaft 18E, and the door 18A including the float 18F at the lower portion is supported by the support shaft 18C below the connection link 18D. Motokawa) The support arm 18B projecting upward from the upper part on the side is supported so that the retracted part toward the inner side surface 18P (right in FIG. 26) of the door body 18A can swing. This Calvert 15B located on the river side 1 from a position directly above the opening end face 15CC of the door body side 18P is, in which suspended from so as to be substantially parallel to the open end face 15CC inclined outlet 15C of Calvert 15B.

The door 18A of the float flap gate 18 is connected to a support shaft 18E disposed at a position extending to the main river side 1 at the upper end of the bracket 19 rising from the upper end of the opening end face 15CC of the outlet 15C of the culvert 15B. In the suspended state via the link 18D, the center of gravity 18gc of the entire door body 18A including the float 18F is on the vertical surface 18e-18e passing through the axis of the support shaft 18E, and the lower part of the door body 18A is from the upper part. The opening end surface 15CC is closed so that the inner side surface 18P of the door body 18A slightly contacts the lower portion of the opening end surface 15CC of the outlet 15C.

When the water flow of the flow channel 15 comes into contact with the inner side surface 18P of the door body 18A, the door body 18A is rotated clockwise (FIG. 26) around the support shaft 18E (18C) via the connecting link 18D. Then, the water flow is discharged to the main river side 1. When the water level on the main river side 1 rises above the water level on the branch river side 2, the outside of the door body 18A is pressed by the water pressure based on the difference in water level, and the door body 18A is counterclockwise around the support shaft 18E (18C) (FIG. 26). ) To close the opening end face 15CC of the outlet 15C, and prevent backflow to the tributary side 2 via the water outlet 15C of the main river side 1.

The center of gravity 18fgc of the entire door body 18A of the float flap gate 18 is the center of gravity 18gg of the door body excluding the float 18F and the center of gravity 18fg of the float 18F (part) (substantially coincides with the volume center 18fc of the float 18F). Between the center of gravity 18g of the door body 18A excluding the float 18F (the state where the door body 18A is not subjected to external force such as buoyancy), that is, the center of gravity 18fgg of the entire door body 18A is located on the support (horizontal) shaft 18E. It is stable in a state located on the vertical surface 18e-18e passing through the center. In this state, the center of gravity 18gg of the door body 18A excluding the float 18F is Lgg closer to the main river 1 (left in FIG. 26) than the vertical surface 18e-18e, and the center of gravity 18fg of the float 18F is the vertical surface 18e-18e. Further, Lfg on the tributary river 2 (right side in FIG. 26) side is stopped in an inclined state that is slightly shifted from each other.

An automatic gate (see Japanese Patent Application No. 10-313953) as schematically shown in the schematic side view of FIG. 27 is also known. This autogate C allows the water flow in the flow channel 15 on the branch river side 2 to flow out to the main river side 1 through the outlet 27E of the rectangular parallelepiped pipe 27 provided in the culvert 15B at the end of the flow channel 15. The door body 38 that opens and closes the opening end surface 27EE of the outlet 27E is attached to one end (lower end) of the arm 33 provided on the horizontal shaft 32 on the top of the rectangular parallelepiped tube 27 (cuboid frame body 28). The door body 38 and a balance weight 35 that substantially balances around the horizontal axis 32 are provided at the upper end, and the opening end surface 27EE of the outlet 27E can be opened and closed by reciprocating rotation of the door body 38 via the arm 33 and the like. Thus, the opening end face 27EE of the outlet 27E is slightly (eg, by the balance body 35 and the door body 38 that balances around the horizontal axis 32 without requiring manual labor or power). 4-5 °), while the door body 38 is opened by the water flow in the flow channel 15 on the tributary river side 2 to flow out to the main river side 1, and the water level rise on the main river side 1 causes the door body 38 to The outer end surface is pressed to close the opening end surface 27EE, and the reverse flow of water on the main river side 1 to the tributary side 2 is automatically prevented.

However, in the conventional auto gates B and C shown in FIGS. 25 and 27, the door bodies 17A and 38 and the balance weights 17E and 35 that open and close the opening end faces 15CC and 27EE of the outlets 15C and 27E of the culvert 15B. Because of this balance, the opening end faces 15CC, 27EE of the outlets 15C, 27E are lightly blocked or slightly opened by the door bodies 17A, 38, so that both the main river side 1 water level and the tributary river side 2 water level are low When the water level on the tributary river side is higher than the water level on the main river side, the inner side surfaces 17P, 38P of the door bodies 17A, 38 The water pressure acting on the outer surface becomes almost equal, and the lower parts of the door bodies 17A and 38 are immersed in the water, receiving the buoyancy corresponding to the volume of the immersed parts, and the balance weights of the door bodies 17A and 38. 7E, 35 unbalanced state around the horizontal axis 17C, 32 and, door 17A, 38 will be spaced apart open edge 15 CC, from 27EE balanced (stationary).

In this state, when a wave or the like is generated on the main river side 1 and the water level is lowered, the door bodies 17A and 38 are rotated by an appropriate amount from the opening end surfaces 15CC and 27EE of the outlets 15C and 27C to the main river side 1, Further away (open) from 15CC and 27EE. If the water level on the main river side suddenly rises immediately after that, the water on the main river side 1 flows back from both sides to the tributary river side 2 before the doors 17A, 38 that are largely opened come into contact with the open end faces 15CC, 27EE. There was a fear.

In addition, in the float type flap gate of FIG. 26, the opening end face 15CC of the outlet 15C at the end of the culvert 15B is formed so as to be inclined so that the lower part from the upper part recedes from the main river side 1 to the branch river side 2. As a support arm 18B having a shape that rises from the upper end of the outer side of the door 18A (Honkawa side 1, left side in FIG. 26) and that the upper end recedes upward on the inner side surface 18P (right in FIG. 26) side of the door 18A. In addition, the upper end of the support arm 18B having such a shape is connected to the lower end of the connection link 18D by the support shaft 18C, and the upper portion of the connection link 18D rises upward from the upper portion of the outlet 15C of the culvert 15B. Is suspended from the upper end of the bracket 19 projecting from the upper end of the outlet 15C end of the culvert 15B toward the main river 1 by a support (horizontal) shaft 18E via a plurality of members. When the center of gravity 18gc of the door body 18A with the seat 18F is on the vertical surface 18e-18e passing through the center line of the support shaft 18E, the lower portion of the inner side surface 18P of the door body 18A, in particular, the lower portion of the door body 18A The inner side surface 18P of the float 18F is retracted to the tributary side 2 (right side in FIG. 26), and the center of gravity 18gg of the door body 18A excluding the float 18F rests in an inclined shape located on the left side of the vertical surface 18e-18e. By this door side surface 18P, the inclined opening end face 15CC of the outlet 15C is closed or opened several degrees (slightly).

Since the door body 18A of the float flap gate 18 is suspended from the support shaft 18E via the connecting link 18D, when the door body 18A is opened and discharged by the water flow from the outlet 15C, the entire door body 18A is discharged. Since most of the weight Wg is supported by the support shaft 18E, the resistance to the water flow is small, and when the water flow stops, the door body 18A returns to its normal opening due to its own weight, but when the water flow on the tributary side 2 becomes large, this door Since the body 18A is not provided with a balance weight, the total weight 18Wg of the door body 18A becomes the outflow resistance of the water flow, and there is a problem that outflow resistance to a large amount of water flow that requires rapid discharge increases.

In addition, if there is a considerable gap between the inner surface 18P of the door 18A and the opening end face 15CC of the culvert 15B, the water on the main river side 1 is closed before the gap due to the water level rise on the main river side is closed. When the inner surface 18P of the door body 18A is brought into strong contact with the inclined opening end face 15CC, the door body 18A is opened by a small amount of water on the branch river side 2. Further, if the connecting link 18D is lengthened, the door body 18A is largely separated from the opening end surface 15EE without increasing the angle of the door body 18A with respect to the opening end surface 15CC (almost in a suspended state). As a result, the door 18A can be discharged without increasing the resistance to a large amount of water flow on the side of the tributary river side 2, but the attachment structure of the door 18A to the support shaft 18E becomes large, and conversely, the connecting link 18D is shortened. When allowed to flow a large amount of water flow tributary side 2 to the river side 1, there is Kirai the total weight 18Wg the door body 18A becomes the outflow resistance of the water flow. As described above, the prior art shown in FIGS. 25, 26, and 27 has a problem that the suspension structure is complicated, the door body is unbalanced due to buoyancy, and the outflow resistance is large. there were.

The present invention has been made in view of the problems in the conventional example as described above. Although details will be described later, the weaknesses of the above-described prior art, that is, the complexity of the structure, the imbalance of the door body (that is, the door body). The instability of the response at the time of opening and closing due to the influence of buoyancy on the water) and the point that the outflow resistance is large.

The present invention adopts the following configuration in order to solve the above-described problems.
According to the present invention, for example, the water flow flowing from the tributary side to the main river side can be selectively interrupted according to the level difference between the water level on the tributary side and the water level on the main river side. In addition, a gate structure that does not require any energy is adopted. In the structure of the non-powered (self-supporting) water control gate according to the present invention (hereinafter referred to as “auto gate”), the two door bodies 1, 1 ′ that open from the tributary side to the main river side are opened from the tributary side. The water flow flowing into the main river side can be selectively cut off according to the level difference between the water level on the main river side and the water level on the tributary side.

Further, these two door bodies 1 and 1 'are connected to the outlet 22 of the rectangular parallelepiped pipe KK (see FIGS. 8 and 9) provided at the end of the flow channel, that is, the opening of the so-called culvert. A smooth hinge means 2 is attached to the vertical girders 3 on both sides of the end face frame 26 and is attached to the main river side so as to be a so-called double door (see FIG. 3). The cords 5 and 5 having the same length are smoothly connected by the cord connecting means 7 between the point B ′ near the distant portion and the point A near the center of the lower surface of the open end face frame 26 of the rectangular parallelepiped pipe KK. In addition, an appropriate weight 8 is suspended (see FIGS. 10 and 11). However, although the outflow opening end face 6 of the rectangular parallelepiped canal KK has an elevation angle of 0 degree (vertical), the same effect can be obtained even if it has a small elevation angle (about 3 degrees). The cable bodies 5 and 5 are attached to one door body and provided with a pair (two cable bodies), and these are connected with a cable body connecting means 7 as an attachment member and one weight 8. The length of 5 is such that when the door body 1 is opened close to 90 degrees, the two doors 1 are in series and cannot be opened any further. The watertight rubber 11 attached to the door 1, 1 'is not shown in FIGS. See FIGS. 2, 3, and 4 for details. Although this configuration looks complicated in words, it can be seen that this structure is very simple with reference to FIGS. The structure of the autogate of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4 and 8 to 11, the present invention is a rectangular parallelepiped provided at the end of an auto gate A, particularly at the end of a flow channel, that is, a so-called carbert opening. A small amount of water flowing from the tributary side T to the main river side M, with the outlet 22 of the pipe KK (water channel frame) lightly closed by the doors 1 and 1 'that are always lightly closed, or opened at a small angle. When the flow rate on the tributary river side T increases, the door bodies 1 and 1 'are opened widely to allow the water to flow out without difficulty, and the water level on the main river side rises abnormally (outside of FIG. 24). In the case of water levels L, M, H, etc.), the door body is pressed from the main river side to the outlet 22 side of the rectangular parallelepiped pipe KK (water channel frame body) due to an increase in water pressure to the door body 1, 1 '. Then, the outlet 22 is closed, and the auto gate A that prevents the reverse flow of the flowing water to the tributary side due to an abnormal rise in the water level on the main river side is used. It is intended to be used.

1 to 4 are views of the autogate A according to the present invention attached to a rectangular parallelepiped pipe KK (water channel frame) as viewed from various directions. FIG. 1 is a front view of the autogate A with the doors 1 and 1 ′ closed. FIG. 2 is a top view of the door 1, 1 ′ of the autogate attached to the stringers 3 on both sides of the opening end face frame 26 by the hinge means 2 and slightly opened, as viewed from above. FIG. 3 is a front view of FIG. 1 in which both door bodies 1, 1 ′ are opened 90 degrees and viewed directly from the main river side (the structure of the mechanism for closing the door body 1 is omitted). FIG. 4 shows watertight rubber attached to the back surface of the door body 1 shown in FIG. The water-tight rubber attached to the back surface of the door body 1 ′ is symmetrical with the water-tight rubber attached to the back surface of the door body 1, and therefore description thereof is omitted.

Now, according to one embodiment of the present invention, a specific configuration is provided in the vicinity of the outside of both side stringers 3 of the opening end face frame 26 of the rectangular parallelepiped KK (see FIGS. 2, 3, 8, 9). A pair of identically shaped and rectangular door bodies 1, 1 'pivotably attached to the stringer 3 by the hinge means 2; doors of the door bodies 1, 1' It is provided on the edge of the body side surface 1-1, 1'-1, and when the door body 1, 1 'is closed, it is vertically added to the opening end face 6 and the center of the opening end face frame 26, and the cross section is isosceles. A triangular base is in close contact with the central reinforcing member 4 in the same plane as the opening end face 6 of the opening end face frame 26, and is provided at the edge where the door bodies 1, 1 'come into contact with each other to create a watertight state. Watertight rubber 11; the top of the door body side 1-1, 1'-1 of each of the door bodies 1, 1 'from the position of the hinge means 2 The same length of the cords 5, 5 smoothly connected and stretched by the cord connecting means 7 between the point B 'near the tip and the point A near the center of the lower surface of the open end face frame 26 of the rectangular parallelepiped KK; A weight 8 hung on the rope connecting means 7; (See FIGS. 10 and 11).

In the first embodiment of the present invention described above, in FIGS. 2, 3, 10, and 11, the doors 1, 1 ′ are both closed and vertically contacted between the upper and lower portions 6. Further, although the central reinforcing member 4 having an isosceles triangle cross section is provided as shown in the figure, this can be omitted in the modified embodiment of the present invention. In that case, as shown in FIGS. 5, 6, and 7, the watertight rubber structure 11-1 provided on the edge where the door bodies 1 and 1 ′ come into contact with each other may be changed to an appropriate one.

In one embodiment of the present invention, a double-open door is used, but structurally, each door operates independently for the left and right objects, so the explanation of the operation will be performed if one door is used. Similarly, only one side (the door 1 on the right side as viewed from the main river side) will be described in order to avoid complexity. First, according to the configuration according to the present invention, when the door body 1 is opened from the tributary river side T to the main river side M, the resistance of the door body 1 against flowing water is the door bodies 17A, 18A, 38 (FIG. 25, FIG. Compared to the weight of the door body 1, it can be easily adjusted by changing only the weight of the suspended weight 8, and the weight 8 can also be reduced in weight. It can be said that it is excellent in terms. The greatest advantage of the autogate of the present invention is that, when the door body 1 is first rotated, (1) it is almost completely unaffected by the buoyancy when the water level rises on the river side M. As a result, That is, the rotation of the door body 1 is stable. This is because, according to the configuration of the present invention, the center of gravity G of the door body 1 rotates in a plane perpendicular to the rotation axis of the hinge means 2. This is partly due to the technical improvement of the current hinge means, but there is a great reason that the center of gravity G of the door body 1 is in the horizontal plane perpendicular to the rotation axis of the hinge means 2. (2) The force that the door body 1 acts in the closing direction is adjusted only by the weight of the weight 8 (about a fraction of the weight of the door body of the conventional example) regardless of the weight (mass) of the door body 1. it can. This also has the advantage that the operating characteristics of the autogate can be easily adjusted simply by changing the weight 8 according to the water flow tendency on the tributary side T. (3) By hanging weights 8 and 8 '(not shown) having different weights on the left and right door bodies 1 and 1', the left and right doors 1 and 1 'can have different opening and closing characteristics. It can handle various water flow conditions on the tributary side. These advantages (1), (2), and (3) are advantages not found in the above-described conventional technology.

Now, let's look at the relationship between the opening degree of the door 1 and the restoring power of the present invention with reference to FIGS.
In short, as shown in FIG. 11, when the door body 1 is opened at a certain angle from the closed state, the two cable bodies 5 and 5 are opened in a V shape while the weight 8 is suspended. The door body 1 receives a force in the closing direction. When the door body 1 returns to the closed position, the weight 8 is at the lowest position, and the opening of the V-shape is minimized. 10 is a view of the door body 1 as viewed from vertically above when the door body 1 is opened around 90 degrees around the hinge means 2, and FIG. 11 shows the door body 1 around the hinge means 2 at an angle α ( The relative positional relationship of the door body 1, the cable bodies 5, 5 and the weight 8 when it is opened by less than 90 degrees is shown. Here, the point A is a point where one of the two cords 5 and 5 having the same length is fixed to the lower surface of the opening end face frame 26 at the outlet of the flowing water channel, and the point B ′ is approximately 90 by the door body 1. When the two same-length cable bodies 5 and 5 are in a straight line when opened, the position where the anchoring position of the cable bodies 5 and 5 to the other door body 1 occupies in the space is shown. A point C indicates a center point of the cord connecting member 7 such as a ring shape connecting the two cords 5 and 5. Grace, the anchoring and connecting method of cords here is a conventionally known method, and it is sufficient to use them as long as a sufficiently smooth connection can be obtained. 10 and 11, the display of the watertight rubber 11 is omitted.

The relationship between the opening degree α around the hinge means 2 of the door body 1 and the force for restoring the door body 1 to the closed state related to the automatic gate A of the present invention will be analyzed. See FIGS. Here, each point of A, B, B ', C, K, and M represents a corresponding position. In FIG. 12, the X, Y, and Z axes represent a space orthogonal coordinate system. When the door body 1 shown in FIG. 10 is opened approximately 90 degrees, when the door body 1 is opened by an angle α shown in FIG. 11, and when the door body 1 is closed (shown in FIGS. 1 and 9). Corresponds to the rectangles KLRB, KLR′B ′, and KLNA, respectively, in the more geometrical FIGS. Now, in FIG. 11, consider the balance of force when the cable bodies 5, 5 are pulled down by the weight w of the weight 8 and the door body 1 is opened by the angle α.

14, the opening degree α (degrees) of the door body 1 and the calculated quantities (various quantities given by the equations (2) to (12) in the figure) are shown in a tabular form in FIG. FIG. 16 is a graph of this table. The horizontal axis of FIG. 16 represents the opening degree α (degrees) of the door body 1, and the vertical axis represents the restoring force of the door body 1 divided by the weight of the suspended weight, that is, how many times the restoring force is the weight of the weight. It is an amount indicating whether or not. As can be seen from this graph, the tensile force in the direction of closing the door body 1 is very small until the opening degree α (degree) of the door body 1 is about 30 degrees. 5, the positions of the anchor point A to the opening end face frame 26 and the anchor point B ′ to the door body 1 do not need to be determined accurately, and it can be seen that there may be some errors (that is, in FIG. The value is very small when the opening degree of the door body 1 is 0 to 30 degrees, and therefore the closing force H _L (= H _R ) is also very small). This makes it easier to implement the present invention and can therefore be an advantage. Further, it can be seen from this graph that the resistance of the door body 1 to the water flow is still quite small until the door body 1 opens at 60 degrees. This means that when there is a large amount of water flow from the tributary side to the main river side and the door body must be opened wide, the outflow resistance is smaller than that of the conventional float flap gate shown in FIG. It is also an advantage that enables. Moreover, since the force which pulls back the door body 1 to a closing direction will raise notably with the opening degree of the door body 1 beyond this, when there is a large amount of water flow outflow from the tributary side to the main river side, the door body 1 is It is thought that there is a tendency to hold down firmly and to prevent large fluttering (particularly compared with the prior art examples shown in FIGS. 25 and 27), and from the main river side to the tributary side due to the unexpected rise in water level on the main river side This will also minimize the risk of backflow.

Now, with reference to FIG. 24, the operation of the auto gate A of the present invention will be described when the water level on the river side rises abnormally due to floods, tsunamis, and the like. Usually, since the water level (outside water level) on the main river side M is located considerably below the outflow channel bottom surface 24, the water level (inside water level) on the tributary river side T (in the rectangular parallelepiped KK) is below the inflow channel bottom surface 23. Is also at a high level, depending on the water level and flow rate, the door body 1, 1 ′ is located at a position between the position where the door body is closed and the position where the door body is opened in FIG. It opens to a position that balances with the closing restoring force by the suspended weight 8. Thereafter, when the water level and flow rate on the tributary river side decrease, the door bodies 1 and 1 ′ return to the closed position by the restoring force of the weight 8 accordingly.
After this, when the water level on the main river side rises to the outside water level L, outside water level M, outside water level H, etc. due to floods, tsunamis, etc., due to the restoring force by the weight 8 and the water pressure on the main river side, The door bodies 1, 1 ′ are pressed against the opening end face 6 of the opening end face frame 26, and no back flow from the main river side to the tributary side occurs.

Next, when the inner water level is flowing at a certain height as shown in FIG. 24, that is, when the doors 1 and 1 'are opened at a certain angle on the main river side, for example, the water level on the main river side is Assuming that the water level has risen to 24, the water level on the main river side is much larger than the water level on the tributary side, so the water flow from the tributary side to the main river side continues until the internal water level becomes equal to the external water level L. However, in this process, the water flow and water level on the tributary side are reduced, and when the internal water level becomes equal to the external water level L, the water flow from the tributary side to the main river side stops, and the water flow inside and outside the door bodies 1, 1 ' As the water pressure becomes equal and at the same time, the restoring force of the weight 8 returns to the closed state of the doors 1, 1 ′ with the reduction of the water flow on the tributary side. Due to the restoring force and the water pressure on the main river side, the door bodies 1, 1 ′ are pressed against the opening end face 6 of the opening end face frame 26, from the main river side to the tributary side. Reverse flow does not occur.

Further, when the inner water level is flowing at a certain height as shown in FIG. 24, that is, when the doors 1 and 1 'are opened at a certain angle on the main river side, for example, the water level on the main river side is FIG. If the water level rises to the outside water level M, the water flow from the tributary side to the main river side stops when the outside water level becomes equal to the inside water level before the outside water level reaches M. The internal and external water pressure to 1 'becomes full, and then the restoring force of the weight 8 returns to the closed state of the door bodies 1, 1', and then the door is driven by the restoring force of the weight 8 and the water pressure due to the water level rise on the main river side. The bodies 1, 1 ′ are pressed against the opening end face 6 of the opening end face frame 26, and no back flow from the main river side to the tributary side occurs even if the outside water level further increases thereafter.

Furthermore, when the inner water level is flowing at a certain height as shown in FIG. 24, that is, when the doors 1 and 1 'are open to the main river side at a certain angle, for example, the water level on the main river side is Assuming that the water level rises to the outside water level H in FIG. 24, the water flow from the tributary side to the main river side stops when the outside water level becomes equal to the inside water level before the outside water level reaches H. The restoring force of the weight 8 returns to the closed state of the door bodies 1, 1 ′, and then the door body 1, 1 ′ opens the opening end frame 26 by the restoring force of the weight 8 and the water pressure due to the water level rise on the main river side. It is pressed against the end face 6 and no back flow from the main river side to the tributary side occurs.

On the other hand, when there is no water flow on the tributary side (inside the rectangular parallelepiped pipe KK), the water level on the main river side rises to the outside water level L, outside water level M, outside water level H due to floods, tsunamis, etc. Because there is no water flow on the tributary side (inside the rectangular parallelepiped pipe KK), the door bodies 1 and 1 'are lightly pressed against the opening end face 6 of the opening end face frame 26 by the restoring force of the weight 8, Water pressure due to the rise of the water level on the river side is also applied, and the pressure is further strongly pressed against the opening end face 6 of the opening end face frame 26, and no back flow from the main river side to the tributary river side occurs.
In this way, the autogate A of the present invention can achieve its intended purpose.

In the above description, when the water level on the main river side rises and becomes slightly higher than the water level on the tributary side, the water pressure difference between the main river side and the tributary side to the door bodies 1, 1 ′ is ′ Acts in the direction of pressing toward the opening end face 6 of the opening end face frame 26, and the buoyancy to the door bodies 1, 1 ′ does not work in this direction, so even if the restoring force by the weight 8 is small, the door The bodies 1, 1 ′ are pressed against the opening end face 6. It is noteworthy that this is based on the fact that the pivoting of the door body is not influenced by the buoyancy to the door body, which is one advantage of the present invention.

Embodiments of the auto gate A according to the present invention will be described below with reference to the related drawings.
First, an outline of the structure of the rectangular parallelepiped tube KK provided at the opening of the culvert to which the autogate of the present invention is attached will be described. As shown in a side view in FIG. 17, this rectangular parallelepiped KK is a rectangular parallelepiped, and both sides of the tributary river side (right side in FIG. 17) and main river side (left side in FIG. 17) are open, The surface is a combination of rectangular frames indicated by a rectangular ceiling frame (or rectangular top frame) 25, a rectangular bottom frame 29, an opening end surface frame 26, and a rear frame 28 in the figure, and the joint portion is two adjacent frames. Are fused. As shown in FIG. 17, these rectangular rectangular frames are added with a diagonal wire and / or a cross as needed. This rectangular parallelepiped pipe KK is made of a strong material such as steel, or preferably stainless steel that is resistant to rust caused by moisture. Depending on the application of the partial portion, A bar or plate having another cross section is cut, welded, or assembled by other well-known methods. The shape of the open end face of the rectangular parallelepiped pipe KK is substantially square, and in the case of an embodiment using two door bodies, the shape of one door body is the vertical end face of the rectangular parallelepiped pipe KK. It has an area approximately equal to the size divided into two.

The rectangular parallelepiped rod KK assembled in this way is watertightly embedded in the opening of the culvert with concrete or the like except for the portion where the door body is attached. As a result, the water flow on the tributary side that has reached the end face of the culvert can flow out to the main river side only through the open portion of the door attached thereto. The inflow path bottom surface 23 and the outflow path bottom surface 24 of FIGS. 8, 9, and 17 may have a slight downward gradient from the tributary river side toward the main river side. Also in this case, it goes without saying that the rotation axis of the hinge means is preferably perpendicular to the horizontal plane. This is to prevent the influence of buoyancy as described above.

According to one embodiment of the present invention, the autogate A of the present invention is: near the outside of both side stringers 3 (see FIGS. 3 and 5) of the open end frame 26 of the rectangular parallelepiped KK (see FIGS. 9 and 17). A pair of identical and rectangular door bodies 1, 1 ', which are pivotally attached to the stringer 3 by the hinge means 2; and each door body 1, 1'. Sides of the door body side surfaces 1-1, 1'-1, which are in close contact with the opening end face 6 when the door bodies 1, 1 'are closed, and where the door bodies 1, 1' are in contact with each other A water-tight rubber 11 which is provided at the edge and creates a water-tight state; the vicinity of the portion B ′ farthest from the position of the hinge means 2 on the side surfaces 1-1, 1′-1 of the door bodies 1, 1 ′ of the respective door bodies 1, 1 ′ And a cord of the same length that is smoothly connected and stretched by the cord connecting means 7 between the point A near the center of the lower surface of the open end face frame 26 of the rectangular parallelepiped pipe KK. 5,5 and; the weight 8 suspended on the rigging connecting means 7; consisting (see FIGS. 10 and 11). Here, the term “smooth” means that the friction at the anchoring points of the cable body 5 and the cable body connecting means 7, and the cable body 5 and the door body side surfaces 1-1, 1 ′-1 and the lower surface of the opening end face frame 26. A connection method that is small enough. As such a smooth connection means, a number of known methods may be employed.

FIG. 1 is a front view of the autogate according to the first embodiment of the present invention as seen from the main river side. The door bodies 1 and 1 'are made of steel or stainless steel plate material for reinforcing the same material. Ribs are arranged. This figure shows a state in which two door bodies 1, 1 'having the same shape are closed. FIG. 2 is a top view of the doors 1 and 1 'as viewed from directly above in a state where the doors 1 and 1' are slightly opened to the main river side M. FIG. FIG. 3 is a front view seen from the main river side when the door bodies 1 and 1 ′ of FIG. 1 are opened 90 degrees to the main river side M in FIG. As shown in FIG. 3, the watertight rubber packing 11 is provided at a portion where the door body 1, 1 ′ is in contact with the opening end face 6 of the opening end face frame 26 and the central reinforcing member 4 provided vertically in the center of the opening. It is attached by a conventionally known method (for example, the method recommended by the “Suimon Iron Pipe Technical Standard” of the Suimon Iron Pipe Association), and the water level on the main river side is closed after the doors 1 and 1 ′ are closed. When the door body 1, 1 ′ is pressed against the opening end surface 6 by water pressure, the watertight state is maintained between the door body 1, 1 ′ and the opening end surface 6. The water flow to the tributary side T (in this case, the reverse flow) is blocked. As shown in the drawing, the central reinforcing member 4 has a cross section of an isosceles triangle and its apex angle faces the tributary side. This is to reduce resistance to water flow from the tributary side T to the main river side M.

It is important that all the components of the rectangular parallelepiped pipe KK shown in FIGS. 8 and 9 and other autogates are made of a material that does not rust even when immersed in water, preferably stainless steel. It is also important to selectively apply a rust preventive paint to the portion that is always in contact with water as necessary. Since the inner surfaces 1-1 and 1'-1 of the door body 1 and 1 'are flat surfaces, it goes without saying that the watertight packing may be provided not on the inner surface of the door body but on the opening end surface 6 side. Yes. In this case, the watertight packing 11 is continuously arranged on the end face 6 of the opening and the main river side of the central reinforcing member 4 in FIG.

Here, the central reinforcing member 4 attached vertically to the central portion of the outlet opening end face frame 26 of the rectangular parallelepiped pipe KK can be omitted. In this case, in order to satisfy the watertight condition, the watertight rubber packing may be provided in contact with both edges closest to each other when the doors 1 and 1 'are closed (see FIGS. 5, 6 and 7). ). For the rubber packing for such a purpose, an appropriate material and shape recommended by the “Sluice Iron Pipe Technical Standards” of the Mizuna Iron Pipe Association may be selected. When attaching a watertight rubber packing to a door or the like, a conventionally used method (introduced in the above standard) may be selected. In this case, the cable body 5, the cable body connecting means 7, the weight 8 and the anchoring method attached to the door bodies 1 and 1 'are the same as those described with reference to FIGS.

As a third embodiment of the present invention, there is an auto gate A that employs a vertically long rectangular single door body 1 shown in FIGS. FIG. 21 corresponds to FIG. 11 for explaining the operation of the first embodiment. As shown in FIG. 21, the additional members of the illustrated autogate A are the cable bodies 5 and 5, the cable body connecting means 7 and the weight 8 shown in FIGS. 1 is equivalent to that described above. In this embodiment, the member corresponding to the central reinforcing member 4 in the first embodiment corresponds to the left vertical girder of the opening end face frame 26 (see FIGS. 20 and 21). The shape of the opening end face frame 26 of this embodiment is such that the width of the opening end face frame 26 of the first embodiment is halved (there is no central reinforcing member 4), and the door body 1 in the first embodiment is used as the door body 1. Similar to 1. In accordance with this, the rectangular parallelepiped pipe KK to which the autogate A is attached also has a cross section whose shape is similar to that of the size in which the end face of the outflow port is halved as compared with the case of the first embodiment.

As Example 4, the one shown in FIGS. This embodiment is a modification of the autogate A mentioned as the first, second and third embodiments. The screen introduced in this embodiment 4 is caught in a thing such as a tree branch during a culvert, and cheap dust etc. enters and is caught by the rope 5 and the weight 8 of the automatic gate A of the present invention. It is a means for eliminating risks such as preventing 1 'closure. 22 is a front view of the rectangular parallelepiped pipe KK viewed from the main river side when both door bodies 1 and 1 'are fully opened, and FIG. 23 is a horizontal view of the screen, that is, FIG. It is the figure seen from the arrow S direction. The members of the comb-shaped screen 14-2, the screen mounting plate 14-1, and the comb teeth 14-3 are all preferably made of a material such as stainless steel that does not easily rust even when in contact with water. As shown in FIG. 23, the comb tooth 14-3 is drawn in a straight line, but is preferably not a straight line and ideally forms a part of a cycloid curve that protrudes downward. It is best, but other curves, such as part of a circle or ellipse, or even a parabola can be substituted. The point of caution is that if the curve is such that the comb tooth 14-3 is gradually lowered from the position where the comb tooth 14-3 is attached to the mounting plate 14-1 toward the opening end face 6 of the rectangular parallelepiped KK. I can do it. Further, the important point is that the dimension indicated by h in FIGS. 22 and 23 is the same as that of FIGS. 11 and 21 and the like, when the weight 8 is lowered to the bottom and the door bodies 1 and 1 ′ are closed. This is a dimension for showing that the effect of the screen is sufficiently exhibited if the lower end of the comb tooth simple substance 14-3 is placed downward. For the dimension d in FIG. 23 as well, in order for the effect of the screen to be sufficiently exerted, the lower end of the comb tooth unit 14-3 is provided as a guideline so that it is not so far away from the end face of the opening of the rectangular parallelepiped tube KK. Dimensions. Due to the effect of this screen, foreign matters such as tree branches that have flowed into the rectangular parallelepiped canal KK flow down along the curve of the comb teeth 14-3, pass under the weight 8, and flow out to the main river side. Will do.

The front view which looked at the door body of one Example of the auto gate A of this invention from the Honkawa side. FIG. 2 is a top view of the autogate A portion shown in FIG. 1 when the door bodies 1 and 1 ′ are slightly opened. The front view from the main river side when the door bodies 1 and 1 'are opened to the main river side by about 90 degrees with the auto gate A shown in FIG. The figure which shows the mounting arrangement | positioning of the watertight rubber | gum provided in the back surface of the door body 1 of the autogate A shown in FIG. FIG. 4 is a front view corresponding to FIG. 3 in an auto gate A of another embodiment of the present invention. FIG. 6 is a top view of the autogate A portion shown in FIG. 5 when the door bodies 1 and 1 ′ are slightly opened. The figure which shows the attachment arrangement | positioning of the watertight rubber | gum provided in the back surface of the door body 1 of the autogate A shown in FIG. The side view which looked at the autogate A by this invention and the rectangular parallelepiped pipe KK which attached it from the right side (the door body 1 is open | released about 90 degree | times). The side view which looked at the autogate A by this invention and the rectangular parallelepiped pipe KK which attached it from the right side (the door body 1 is closed). The top view for demonstrating the attached component of the door body 1 of the autogate A of this invention. The perspective view for demonstrating the attached component and operation | movement of the door 1 of the autogate A of this invention. The spatial coordinate for analyzing operation | movement of the door 1 of the auto gate A of this invention. The figure which extracted and showed a part of FIG. The calculation form which calculated the restoring force to the closing direction applied to the door body 1 of the automatic gate A of this invention using the spatial coordinate of FIG. A table summarizing various quantities calculated according to the calculation chart of FIG. The graph showing the opening degree of the door body 1 represented to the table | surface of FIG. 15, and the restoring force to a closed state. The figure for demonstrating the structural example of the rectangular parallelepiped pipe KK which attaches the autogate A of this invention. The front view of the other Example of the auto gate A of this invention. The top view when the door 1 is opened slightly for the auto gate A portion shown in FIG. The front view which looked at the autogate A part shown in FIG. 18 from the main river side when the door 1 is opened about 90 degrees to the main river side. The perspective view for demonstrating operation | movement of the door body 1 in the other Example of the automatic gate A of this invention shown in FIG. The front view which shows further another Example of the auto gate A of this invention. The side view which looked at the autogate A shown in FIG. 22 from the arrow S direction of FIG. The figure for demonstrating the effect of the auto gate A of this invention. The figure which shows the 1st example of the prior art with respect to this invention. The figure which shows the 2nd example of the prior art with respect to this invention. The figure which shows the 3rd example of the prior art with respect to this invention.

DESCRIPTION OF SYMBOLS 1, 1 'door body 1-1 Inner side surface of door body 1'-1 Inner side surface of door body 1' 2 Hinge means 3 Opening end frame frame girder 4 Center reinforcement member 5 Search body 6 Opening end surface 7 Search body connection Means 8 Weight 11 Watertight rubber 21 Inflow port 22 Outlet port 23 Bottom surface of the flow channel 24 Bottom surface of the outflow channel 25 Rectangular top frame 26 Open end surface frame 28 Rear frame 29 Rectangular bottom frame

Claims (4)

An autogate attached to the main river side open end of the rectangular parallelepiped pipe KK provided at the end of the water channel leading from the tributary side to the main river side:
Hinge means 2 provided in the vicinity of the outside of both side stringers 3 of the open end face frame 26 of the rectangular parallelepiped pipe KK;
A pair of identical and rectangular door bodies 1, 1 ', which are pivotally attached to the stringer 3 by the hinge means 2;
The door bodies 1 and 1 'are provided on the edges of the door body side surfaces 1-1 and 1'-1, and when the door bodies 1 and 1' are closed, the door bodies 1 and 1 'are in close contact with each other, and the door body 1 , 1 'and water-tight rubber 11 which is provided at the edge where the comrades come into contact to create a water-tight state;
The vicinity of the portion B ′ farthest from the position of the hinge means 2 above the side surfaces 1-1, 1′-1 of the door bodies 1, 1 ′ and the lower surface of the open end face frame 26 of the rectangular parallelepiped rod KK. Between the points A in the vicinity of the center, the cable bodies 5 and 5 of the same length smoothly connected in series by the cable body connecting means 7 and stretched;
A weight 8 suspended from the cord connection means 7;
Consists of The autogate according to claim 1, wherein:
The rectangular parallelepiped pipe KK is provided vertically in the center of the opening end face 6 of the opening end face frame 26, has a cross section of an isosceles triangle, its base is in the same plane as the opening end face 6, and has a vertex. A central reinforcing member 4 disposed so as to be on the tributary river side of the opening end face 6 is attached. An autogate that is attached to a rectangular parallelepiped KK provided at the end of a water channel that leads from the tributary side to the main river side, and whose shape of the opening end face frame 26 on the main river side is a vertically long rectangle:
Hinge means 2 provided in the vicinity of the outer side of the one-side stringer 3 of the open end face frame 26 of the rectangular parallelepiped pipe KK;
A rectangular door body 1 rotatably attached to the stringer by the hinge means 2;
A watertight rubber 11 provided on an edge of the side surface of the door body 1 of the door body 1 and in close contact with the opening end face 6 of the opening end face frame 26 when the door body 1 is closed;
Near the point B ′ farthest from the position of the hinge means 2 at the upper part of the door body side surface of the door body 1 and near the end point A farthest from the hinge means 2 on the lower surface of the open end face frame 26 of the rectangular parallelepiped pipe KK. Between the same length of the cords 5, 5 smoothly connected in series by the cord connecting means 7, and stretched;
A weight 8 suspended from the cord connection means 7;
Consists of The autogate according to claim 1, 2, 3:
A comb-shaped screen 14-2 is attached to the inner surface of the rectangular top frame 25 of the rectangular parallelepiped pipe KK.

Images