JPH0720315U - Automatic opening and closing lock - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an automatic opening and closing gate that opens and closes using the force of nature to prevent water from flowing backward from the main stream of a river to a rainwater ditch. [Structure] A door member 23 for closing the hinge device 22 and the spout 7 of the rainwater ditch 5 is provided at the river upstream corner of the embankment 3 where the mainstream 1 of the river and the rainwater ditch 5 flowing into the mainstream 1 are connected, It was attached by projecting from river bank 3 toward main stream 1. Therefore, when the river increases and the water level rises, the water pressure on the main stream 1 side becomes larger than the water pressure on the rainwater groove 5 side, and the door member 23 automatically closes. Water is prevented from flowing back to the 2 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic opening and closing gate, and more particularly to an automatic opening and closing gate that prevents water from flowing back from a mainstream of a river to a rainwater ditch.

[0002]

[Prior art]

 In general, as a measure against rainfall in urban areas, rainwater that falls in urban areas is poured into rainwater ditches, and the rainwater ditches are guided to relatively large rivers that run outside the urban areas to prevent rainwater from flooding the urban areas. ing. In a conventional example of such a rainwater ditch, there is one in which a lock is provided at a place where the rainwater ditch flows into the main stream of the river to prevent water from flowing backward when the river increases. In conventional locks, the gear mechanism is usually manually operated to open and close the door.

[0003]

[Problems to be solved by the device]

 However, in such a conventional lock, people living in the neighborhood must gather at the lock every time the river rises and the water decreases thereafter, and the doors must be opened and closed manually with each person. However, when a lot of labor is required and there are many locks along the river, the water from other locks will be consumed while the work of closing one lock is completed when the river is flooded. It could be said that it would flow backwards, and it was not always useful.

The present invention has been made in view of the above problems, and an object thereof is an automatic opening and closing gate that opens and closes by utilizing the force of nature to prevent water from flowing backward from a main stream of a river to a rainwater ditch. Is to provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a hinge device at the upstream corner of the river on the embankment where the main stream of the river and the rainwater channel flowing into the main stream are connected, and the rainwater is attached to the hinge device. The gist of the lock is that the door member that closes the spout of the ditch is attached from the river embankment to the main stream.

[0006]

[Action]

 According to the present invention, the door member is normally opened to allow water to flow from the rainwater ditch side to the river side due to the above configuration. When it rains and the river rises, the mainstream water tries to close the door member by touching the bottom of the door member, but initially the door member does not close, competing with the water flow flowing down the rainwater ditch. Eventually, when the river greatly increases in water level and the water level rises, the water pressure on the mainstream side of the river becomes greater than the water pressure on the rainwater ditch side, and the door member is closed. This prevents water from flowing back from the mainstream side to the rainwater ditch side.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of an automatic opening / closing lock constructed at a connecting portion between a river mainstream and a rainwater ditch according to a first embodiment of the present invention. In FIG. 1, 1 is the main stream of the river (hereinafter simply referred to as the main stream), 2 is the river bottom, 3 is the right bank of the main stream 1, 4 is the left bank, 5 is the rainwater ditch connected to the main stream 1, and 6 is the river bottom is there. The rainwater ditch 5 is connected to the mainstream 1 by flowing at a position higher than the riverbed 2 of the mainstream 1 by a predetermined dimension H. 7 is the spout. In the main stream 1, the upper right direction in the figure is upstream, and in the rainwater ditch 5, the upper left direction in the figure is upstream. Reference numeral 21 is an automatic opening / closing lock constructed at the spout 7 of the rainwater ditch 5.

The spout 7 of the rainwater groove 5 is provided with a structure for installing an automatic opening / closing lock 21. That is, a hinge storage space 8 is provided at a corner portion on the upstream side of the main stream 1 of the right bank 3, and a recessed step portion 10 is formed as a door receiving portion 9 at the opposite corner portion on the downstream side, and a rubber plate 11 is provided there. Is attached. In addition, an inclined surface 12 is formed at the end of the riverbed 6 so as to be inclined in the direction of the main stream 1 at its corner.

The automatic opening and closing gate 21 includes a hinge device 22, a door member 23, and a protector 24. The hinge device 22 is installed and fixed in the hinge storage space 8 on the right bank 3. A part of the hinge device 22 has a corrugated fixing plate 25, which is attached to the right bank 3 by placing a concrete block 3a. Due to the corrugated shape of the fixing plate 25, the fixing plate 25 is prevented from coming off, and a reliable fixing can be obtained. The door member 23 is a substantially quadrilateral member that fits into the spout 7 of the rainwater groove 5 and can close the spout 7. The bottom surface of the door member 23 is an inclined surface 26 that can overlap the terminal inclined surface 12 of the spout 7. The side part is assembled to the hinge device 22 and is set so as to project toward the main stream 1 in the normal state. In the case of the present embodiment, since the hinge device 22 is installed with its central axis 22a tilted to the upstream side of the main stream 1, the door member 23 is normally extended to the main stream 1 side by its own weight. Accordingly, as a specific shape of the door member 23, as shown in FIG. 2, in consideration of the tilted portion of the hinge device 22, in order to correspond to the spout 7 of the rainwater groove 5 shown in FIG. , The upper side is larger than the lower side, and it is almost trapezoidal. The protector 24 is a plate member capable of protecting the hinge device 22, and is attached at a position slightly upstream of the position where the hinge device 22 and the door member 23 of the right bank 3 are attached. Similar to the hinge device 22, this protector 24 also has a corrugated fixing plate 27 in a part thereof, and is attached by driving a concrete block 3a on the right bank 3 to form a corrugated fixing plate 27. The fixing plate 27 of FIG. 2 is prevented from coming off and is securely fixed.

Next, the operation of the automatic opening / closing lock 21 in the first embodiment will be described with reference to FIG. For example, if a fine day continues and the water level of the main stream 1 is at L1 which is lower than the river bottom 6 of the rainwater ditch 5, the flow of the main stream 1 has no effect on the door member 23. That is, since the central axis 22a of the hinge device 22 is tilted in the upstream direction of the main stream 1, the door member 23 projects in the main stream 1 direction by its own weight and opens the spout 7 of the rainwater groove 5. Therefore, the water flow of the rainwater ditch 5 flows down from the spout 7 to the main stream 1. Then, if the water level L1 of the main stream 1 does not rise significantly even if some rain falls, the rain water flows into the main stream 1 from the spout 7 of the rainwater groove 5.

On the other hand, when the water level of the main stream 1 increases due to heavy rainfall on the upstream side, the water level of the main stream 1 rises from L1 to L2, for example, and becomes higher than the river bottom 6 of the rainwater ditch 5. Here, if the water level L2 of the main stream 1 is higher than the river bottom 6 of the rainwater ditch 5, the waterflow of the rainwater ditch 5 is still stronger, so the rainwater flows from the rainwater ditch 5 to the main stream 1, Even if the main stream 1 pushes the door member 23 to close the spout 7 of the rainwater groove 5, the pressure of the water flowing down the rainwater groove 5 opposes the door member 23 so that the door member 23 does not rotate easily. After that, when the water level L2 of the mainstream 1 further rises and becomes stronger than the waterflow of the rainwater ditch 5, the water flows back into the rainwater ditch 5, and the water pressure pushing the door member 23 is also larger in the mainstream 1. It becomes larger than the groove 5, and the door member 23 is rotated in the direction of the arrow in FIG. 1 to completely close the spout 7 of the rainwater groove 5. At this time, the door member 23 is urged against the door receiving portion 9 at the corner portion on the downstream side of the spout 7 via the rubber plate 11 even if the door member 23 is pushed vigorously. Further, when the main stream 1 is flooded, the flow is strong and a large amount of rocks and driftwood are carried from the upstream, but these driftwood are repelled by the protector 24, and the hinge device 22 and the door. Protects member 23 from destruction. In addition, a protector may be attached to the rainwater groove 5 to obtain the same effect.

[0012] The rainwater in the upstream area is weakened, the water flow coming in is reduced and the water level is lowered, or the water level is lowered due to the low tide phenomenon of seawater near the river mouth. Push away to open the spout 7 and pour into the main stream 1. As described above, since the central axis 22a of the hinge device 22 is inclined in the upstream direction of the main stream 1, the door member 23 is opened in the direction in which the spout 7 of the rainwater groove 5 is opened by its weight even when it is closed. It is about to rotate, and therefore the door member 23 is rotated to open the spout 7 even if the force of the water flow in the rainwater ditch 5 is not significantly greater than the force of the water flow in the main stream 1.

As described above, according to the automatic opening / closing gate 21 according to the first embodiment, the rain force is increased by rotating the door member 23 by utilizing the natural force, that is, the force of the water flow when the main stream 1 is filled with water. Since the groove 5 is closed, it is possible to surely prevent the water from flowing back into the rainwater groove 5 without requiring manpower.

FIG. 3 shows the configuration of the second embodiment of the present invention. In this embodiment, the spout of the rainwater ditch is of a type having a large opening area of, for example, 2 square meters. In the figure, reference numerals 1, 3, 5, 6, and 7 respectively denote the main stream, the right bank, the rainwater ditch, the river bottom, and the spout, as in the first embodiment. Here, it is assumed that the main stream 1 is flowing toward the front toward FIG.

In FIG. 3, reference numeral 31 is an automatic opening / closing lock, and 32 is a door member thereof. The door member 32 has a three-tiered structure in the vertical direction, and has a lower door portion 33, a middle door portion 34, and an upper door portion 35, which are fitted to the spout 7 as a whole. Form a quadrangle that can be closed. Note that each of the door portions 33, 34, and 35 is attached to a hinge device (not shown) fixed to the upstream corner of the right bank 3 at the spout 7, as in the first embodiment. It is overhanging to side 1. In the lower-stage door portion 33 and the middle-stage door portion 34, and in the middle-stage door portion 34 and the upper-stage door portion 35, mutually facing end surfaces are formed obliquely downward from the rainwater groove 5 side toward the main stream 1 side and overlap each other. It is like this. 36, 37, 38 are gaps for absorbing dimensional errors when assembling the door parts 33, 34, 35 into the spout 7, and are provided on the surfaces of the door parts 33, 34, 35 facing the main stream 1. Rubber plates 39, 40, 41 each having an inverted L-shaped cross section are vertically provided at the lower portions to cover the gaps 36, 37, 38 immediately below the door portions 33, 34, 35.

Next, the operation of the automatic opening / closing lock 31 in the second embodiment will be described with reference to FIG. Normally, the door member 32, that is, the lower door portion 33, the middle door portion 34, and the upper door portion 35 are projected toward the main stream 1 side, so that the spout 7 of the rainwater groove 5 is opened and the rainwater groove 5 is opened. The water flowing through flows into the main stream 1.

When it rains and the river rises and rises from the water level L1, the water of the main stream 1 touches the lower part of the door member 32, that is, the lower door part 33, and first tries to close the lower door part 33. At first, the lower door 33 does not close in opposition to the water flow flowing down the rainwater ditch 5. Eventually, when the main stream 1 greatly increases in water level and rises to, for example, the water level L2, the water pressure on the main stream 1 side becomes larger than the water pressure on the rainwater groove 5 side, and the lower door portion 33 rotates to lower the lower door portion 33. The rubber plate 39 closes the gap 36 between the rainwater groove 5 and the river bottom 6 to completely close the lower part of the spout 7. Therefore, water is prevented from flowing backward from the main stream 1 side to the rainwater ditch 5 side. When the water level in the rainwater ditch 5 gradually rises and eventually rises to a height over the lower door portion 33, the rainwater flows down to the main stream 1 on the oblique upper end surface of the lower door portion 33.

When rain continues, the water level of the main stream 1 rises to, for example, L3, and when the water pressure on the main stream 1 side becomes larger than the water pressure on the rainwater groove 5 side, the middle-stage door portion 34 is rotated next, and the middle-stage door portion 34 The lower rubber plate 40 closes the gap 37 with the lower door portion 33, and together with the lower door portion 33 completely closes the middle position of the spout 7, from the river bottom 6 to a height of about two-thirds. Therefore, the backflow of water from the main stream 1 side to the rainwater groove 5 side is prevented. Similarly, when the water level in the rainwater ditch 5 rises next and rises to a height where the water passes over the middle-stage door portion 34, the rainwater flows down to the main stream 1 on the oblique upper end surface of the middle-stage door portion 34.

When the rain continues to fall and the water level of the main stream 1 rises to, for example, L4, and the water pressure on the main stream 1 side becomes larger than the water pressure on the rainwater groove 5 side, the upper door portion 35 rotates this time, and the upper door portion 35. The lower rubber plate 41 closes the gap 38 with the middle door 34, and closes the upper part of the spout 7. That is, the entire spout 7 is completely closed together with the middle door portion 34 and the lower door portion 33. Therefore, water is prevented from flowing backward from the main stream 1 side to the rainwater ditch 5 side.

Then, when the water level of the main stream 1 decreases due to the stop or weakening of the rain or the low tide phenomenon of seawater near the river mouth, the water stream of the rainwater ditch 5 first pushes the upper door portion 35 away and spouts 7 Is opened, and the main stream 1 flows down on the oblique upper end surface of the middle-stage door portion 34. As described in the first embodiment, since the central axis of the hinge device is tilted in the upstream direction of the main stream 1, the upper door portion 35 is kept closed by the weight of the upper door portion 35 due to its weight. Even if the force of the water flow in the rainwater groove 5 is not significantly larger than the force of the water flow in the main stream 1, the upper door portion 35 is rotated to open the upper part of the spout 7 even if the force of the water flow in the rainwater groove 5 is not significantly greater than . When the water level gradually lowers, the water flow in the rainwater ditch 5 similarly pushes the middle door portion 34 and the lower door portion 33 in order to open the middle and lower portions of the spout 7, and then flows into the main stream 1.

As described above, according to the second embodiment, the entire door member 32 has the three-stage structure including the lower door portion 33, the middle door portion 34, and the upper door portion 35. It can also be installed at the mouth 7, and as in the first embodiment, the force of the water flow when the main stream 1 increases is used to rotate the door parts 33, 34, 35 according to the water level. Since the spout 7 of the rainwater ditch 5 can be sequentially closed from the lower level to the middle level and the upper level, it is possible to reliably prevent the water from flowing back into the rainwater ditch 5 without requiring any manpower. .

In the first and second embodiments, it is assumed that the hinge device of the automatic opening and closing gate is installed at the mainstream upstream corner of the right bank with the central axis of the hinge device inclined toward the mainstream upstream side. As an example, depending on the structure of the connection between the river and the rainwater ditch, for example, it may be installed in the rainwater ditch near the mainstream upstream corner, and if its central axis is also inclined to the mainstream side, The inclination direction may be upstream or downstream. In short, it is suitable for the structure in which the door member normally overhangs to the main stream side to open the spout of the rainwater ditch and efficiently receive the water flow when the main stream increases and close the spout with its force. To take the form. By the way, by installing the hinge device in the rainwater ditch, it will be hidden at the corner of the embankment, which has the new effect of preventing collision of driftwood from the upstream of the mainstream.

Further, in the second embodiment, the door member is illustrated as a three-stage structure, but it may be appropriately changed to a two-stage structure, a four-stage structure, or a five-stage structure according to the depth of the rainwater groove. May be.

[0024]

[Effect of device]

 As described above, according to the present invention, the door device for closing the hinge device and the spout of the rainwater gutter at the upstream corner of the river of the embankment where the mainstream of the river and the rainwater gutter flowing into the mainstream are connected. Since it was installed by projecting from the river embankment toward the main stream, when the river greatly increased and the water level became higher, the water pressure on the main stream side of the river became larger than the water pressure on the rainwater ditch side automatically. The door member closes, which prevents water from flowing back from the mainstream side to the rainwater ditch side. For this reason, by using the power of nature, it is possible to realize a lock that is resistant to disasters without requiring human intervention.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an automatic opening / closing lock constructed at a connecting portion between a river mainstream and a rainwater ditch according to a first embodiment of the present invention.

FIG. 2 is a schematic front view showing a door member of the automatic opening and closing gate.

FIG. 3 is a schematic cross-sectional view of an automatic opening / closing lock constructed at a connecting portion between a river mainstream and a rainwater ditch according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Main stream of river 2 Riverbed 3 Right bank 3a Concrete block 4 Left bank 5 Rainwater ditch 6 River bottom 7 Spout 8 Hinge storage space 9 Door receiving part 10 Concave step 11 Rubber plate 12 Sloping surface 21 Automatic opening / closing lock 22 Hinge device 22a Central shaft 23 Door member 24 Protector 25 Fixing plate 26 Sloping surface 27 Fixing plate 31 Automatic opening / closing lock 32 Door member 33 Lower door part 34 Middle door part 35 Upper door part 36, 37, 38 Gap 39, 40, 41 Rubber plate L1, L2, L3, L4 Water level

Claims (1)

[Scope of utility model registration request] 1. A door member for providing a hinge device at the upstream corner of the river of the embankment where the main stream of the river and the rainwater groove flowing into the mainstream are connected, and for closing the spout of the rainwater groove on the hinge device. An automatic opening and closing gate that was installed by protruding from the river embankment toward the main stream.