JP2016142030A - Buoyancy-based waterproof system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buoyancy-based waterproof system to block water flowing in a channel by a waterproof plate that stands up by its buoyancy, which does not need to adjust positions of various part members and can be easily installed in the channel.SOLUTION: A buoyancy-based waterproof system in this invention comprises: a waterproof board 10 of which the specific gravity is smaller than that of water; a hinge 20 which supports the waterproof board 10 to revolve around a revolving shaft 23a which is parallel to the floor surface; and a watertight elastic membrane 30 which is closely fit to both the waterproof board 10 and a base 92 covering the gap between the waterproof board 10 and the base 92. The hing 20 comprises a pair of blades 21, 22 which are fitted to revolve individually around the revolving shaft 23a, while the blade 21 being fitted over the entire length of a side 10a of the waterproof board 10, and the blade 22 being fitted to the base 92.SELECTED DRAWING: Figure 3

Description

  The present invention is installed in a passage near an entrance to an underground space or a living space, and in the event of a flood, a waterproof plate rises up to dam up the passage by buoyancy, thereby preventing inflow of water to the entrance The present invention relates to a waterproof device.

  In recent years, in addition to heavy rains due to typhoons and the activation of the front, due to the effects of climate change and heat island phenomenon, rain that falls drastically in a short time (so-called guerrilla heavy rain) has been observed in various places mainly in urban areas, Many flood damages have been reported. In particular, the entrances to underground spaces such as subways, underground malls, underground parking lots, and underground elevators, and the entrances to living spaces such as condominiums, office buildings, public facilities, and shopping centers are particularly damaging.

  Therefore, a buoyancy type waterproof device is known in which a waterproof plate is erected using water buoyancy to dam up a passage so that water does not flow into the doorway even if a flood occurs (see Patent Document 1).

  In this buoyant waterproof device, the waterproof plate that plays a role of damming the passage extends over almost the entire width of the passage in order to dam the passage when standing up. And the waterproof board is comprised so that it may rotate around the one rotating shaft provided in the floor surface of the channel | path so that it may stand up with the buoyancy of water.

  The waterproof plate of the buoyancy waterproof device described in Patent Document 1 includes a guide member that defines the rotational motion of the waterproof plate, and this guide member extends over the entire width in the width direction of the passage. Pins are provided protruding on both sides of the waterproof plate, and arc-shaped guide grooves that accommodate the pins and regulate the rotational movement of the waterproof plate are provided on the walls on both sides in the width direction of the passage. (See Patent Document 1 and FIGS. 1 and 3).

  As described above, when providing a plurality of members to define the rotational movement of the waterproof plate rotating around one rotation axis, unless the rotation center of each member coincides with one rotation axis, The waterproof board does not rotate smoothly. Therefore, when installing the buoyancy type waterproof device in the passage, it is necessary to adjust the position of each member so that the rotation center of each member coincides with one rotation axis. In addition, the buoyancy type waterproof device includes a guide member that extends over almost the entire width of the passage, so that the weight of the waterproof plate becomes heavy, and there is a problem that a lot of manpower is required for installation work.

  In addition, the buoyancy waterproof device described in Patent Document 1 includes a watertight rubber film between the waterproof plate and a fixing member that supports the waterproof plate (FIGS. 1 and 2 of Patent Document 1, reference numeral 15). In order to make this water-tight rubber film come into close contact, a presser plate is provided that extends over almost the entire width of the passage (FIGS. 1 and 2 and reference numerals 16 and 17 of Patent Document 1). Therefore, when this buoyant waterproof device is installed in the passage, there is a problem that in addition to the above-described adjustment operation of the rotating shaft, an operation of attaching a presser plate is further required.

JP 2013-2250 A

  In view of the above problems, the present invention eliminates the need to adjust the positions of a plurality of members so that the respective rotation centers are aligned on a single rotation axis, and can be easily installed in a passage. An object is to provide an apparatus.

  Another object of the present invention is to provide a buoyancy type waterproof device capable of easily and reliably realizing watertightness in a gap between a waterproof plate and a floor surface.

  Another object of the present invention is to start the standing operation of the waterproof plate at an early stage in the event of a flood, and there is no step between the top surface of the waterproof plate and the floor surface when the waterproof plate is overlaid. It is to provide a buoyant waterproof device that can be installed.

  Another object of the present invention is to provide a buoyancy type waterproof device having a waterproof plate that is lightweight and easy to process. Also, when the waterproof plate has high strength and rises and water pressure acts on it. An object of the present invention is to provide a buoyancy type waterproof device that has a small deflection and a low risk of water leakage.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a buoyancy type waterproof device that dams water flowing through a passage with a waterproof plate that stands up by buoyancy and is smaller than water. A waterproof plate having specific gravity, a hinge for rotatably supporting the waterproof plate around a rotation axis parallel to the floor surface of the passage, and the waterproof plate so as to cover a gap between the waterproof plate and the floor surface And a watertight elastic membrane closely bonded to each of the floor surfaces, and the hinge has a pair of blades rotatably connected to each other around the rotation axis, and one of the blades is the The buoyancy waterproof device is characterized in that it is coupled over the entire length of one side of the waterproof plate and the other blade plate is coupled to the floor surface.

  The invention according to claim 2 is characterized in that the one blade plate and the other blade plate are respectively coupled to the waterproof plate and the floor surface with the watertight elastic membrane interposed therebetween. Item 4. The buoyancy waterproof device according to Item 1.

  According to a third aspect of the present invention, a recess for accommodating the waterproof plate is provided on the floor surface, and the upper surface of the waterproof plate and the floor surface are in a state where the waterproof plate is received in the recess. The buoyancy waterproof device according to claim 2, wherein the buoyancy waterproof device has the same height.

  The invention described in claim 4 is characterized in that the waterproof plate is formed by laminating a plurality of plate pieces formed by reinforcing foamed resin with inorganic fibers extending in one direction in the thickness direction. It is a buoyancy type waterproofing device in any one of 1-3.

  The invention according to claim 5 is characterized in that the direction of the inorganic fibers of the two plate pieces arranged on the outermost side in the thickness direction is parallel to the one side of the waterproof board. 4 is a buoyancy waterproof device.

  According to the first aspect of the present invention, it is possible to provide a buoyancy type waterproof device that does not require an operation of adjusting the positions of a plurality of members, allows the waterproof plate to rotate smoothly, and is easy to install.

  According to the second aspect of the present invention, a buoyancy type waterproof that can realize water tightness without the need of a separate presser plate for bringing the water tight elastic membrane, the waterproof plate and the floor surface into close contact with each other. Board can be provided.

  According to the invention described in claim 3, it is a buoyancy type waterproof device in which the standing operation of the waterproof board is started at an early stage when water first accumulates in the recess during a flood, and the top surface of the waterproof board when the waterproof board falls down There is no step between the floor and the floor surface, and a buoyancy type waterproof board that can be installed in a passage through which the vehicle passes can be provided.

  According to the fourth aspect of the present invention, it is possible to provide a buoyancy type waterproof device having a waterproof plate that is lightweight and easy to process and can be easily combined with a hinge over the entire length of one side.

  According to the fifth aspect of the present invention, it is possible to provide a buoyancy type waterproof device that has high strength, has a small deflection when standing and water pressure acts, and has a low risk of water leakage.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of the buoyancy type waterproofing apparatus which concerns on 1st embodiment of this invention, Comprising: (a) is a schematic plan view which shows the state which the waterproof board has stood up, (b) is the waterproof board standing up It is a schematic side view which shows each of the state which exists and is lying down. It is a figure which shows the buoyancy type waterproof device which concerns on 1st embodiment of this invention, Comprising: It is a top view which fractures | ruptures and shows the state in which the waterproof board is lying down. It is an expanded sectional view which shows the AA cross section in FIG. It is an expanded sectional view which shows the BB cross section in FIG. It is a disassembled schematic diagram for demonstrating the structure of the waterproof board of the buoyancy type waterproof apparatus which concerns on 1st embodiment of this invention. It is the schematic of the buoyancy type waterproof device which concerns on 2nd embodiment of this invention, Comprising: It is a schematic side view which shows the state which the waterproof board has stood up. It is sectional drawing which shows the coupling | bond part of the waterproof board and floor surface in other embodiment of the buoyancy type waterproof apparatus which concerns on this invention.

  Next, an embodiment of a buoyancy waterproof device to which the present invention is applied will be described with reference to the drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

[First embodiment]
A first embodiment of a buoyancy waterproof device according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of a buoyancy type waterproof device according to a first embodiment of the present invention, in which (a) is a schematic plan view showing a state in which a waterproof plate is raised, and (b) is a waterproof plate. It is a schematic side view which shows each the state which has stood up and the state which has fallen. FIG. 2 is a diagram showing the buoyancy type waterproof device according to the first embodiment of the present invention, and is a plan view showing a state in which the waterproof plate is lying down with a part thereof broken. 3 is an enlarged sectional view showing an AA section in FIG. 2, and FIG. 4 is an enlarged sectional view showing a BB section in FIG. FIG. 5 is an exploded schematic view for explaining the configuration of the waterproof plate of the buoyancy waterproof device according to the first embodiment of the present invention.

  First, the function of the buoyancy waterproof device according to the present invention will be described with reference to FIG. In addition, the waterproof board 10 shown with the continuous line in FIG.1 (b) is a standing state, and the waterproof board 10 shown with the dashed-two dotted line is the state in which it is lying down.

  The buoyancy waterproof device 100 is installed in the passage 90. The passage 90 is partitioned by a floor surface 91 and side walls 93 and 94, and an entrance (not shown) exists on the left side in FIG. When a flood occurs, the water flows in the direction indicated by the arrow through the passage 90.

  The buoyancy waterproof device 100 includes a waterproof plate 10 that is rectangular in plan view, and the waterproof plate 10 is coupled to a floor surface 91. The specific gravity of the waterproof board 10 is set smaller than the specific gravity of water, and when the flood occurs and the water flows through the passage 90, the waterproof board 10 stands by buoyancy (see the solid line portion in FIG. 1B). The waterproof plate 10 and the floor surface 91 and the side walls 93 and 94 are watertight. In the standing state, the waterproof plate 10 blocks the passage 90 and the water level is on the right side (upstream side) of the waterproof plate 10. Even if it rises to WL, water does not flow into the left side (downstream side) of the waterproof board 10.

  The waterproof plate 10 is coupled to a base 92 having a C-shaped cross section via a hinge 20. The base 92 is fixedly coupled to the floor surface 91, and the base 92 and the floor surface 91 are integrated. A rotation shaft 23a of the hinge 20 is disposed along one side 10a of the waterproof plate 10, and the waterproof plate 10 is rotatable about the rotation shaft 23a. The hinge 20 is disposed so that the rotation shaft 23 a is parallel to the floor surface 91. As shown in FIG. 1 (a), stoppers 93a and 94a are provided on the side walls 93 and 94, respectively, so that the waterproof plate 10 rotating counterclockwise in FIG. The position of the standing state is defined by hitting 94a.

  A recess 91a is formed in the floor surface 91. When the waterproof board 10 is lying down, the waterproof board 10 is accommodated in the recess 91a as shown by a two-dot chain line in FIG. At this time, the lower surface 10c of the waterproof board 10 is in contact with the support surface 91b in the recess 91a, while the upper surface 10b of the waterproof board 10 is at the same height as the floor surface 91. In this way, the upper surface 10b of the waterproof board 10 and the floor surface 91 are at the same height in a lying state, so that there is no step in the passage 90 and the passage of a vehicle or the like is facilitated.

  Also, during a flood, water first accumulates in the recess 91a. When water begins to accumulate in the concave portion 91a, buoyancy is generated in the waterproof board 10 in a state of lying in the concave portion 91a, and the standing operation is started. That is, since the recess 91a for accommodating the waterproof board 10 is provided in the floor surface 91, the waterproof board 10 starts to stand up early during a flood.

  Next, a specific configuration of the buoyancy waterproof device 100 will be described with reference to FIGS. As shown in FIG. 2, the buoyancy waterproof device 100 includes a rectangular waterproof plate 10 in plan view, and a hinge 20 and a watertight elastic membrane 30 are disposed along one side 10 a in the longitudinal direction of the waterproof plate 10. ing. The hinge 20 is coupled to the waterproof plate 10 and the base 92 via a plurality of bolts 41 and 42 with the watertight elastic membrane 30 interposed therebetween.

  A side watertight member 50 and a presser plate 51 are disposed along both sides of the waterproof plate 10 in the short direction. The presser plate 51 is coupled to the waterproof plate 10 via bolts 52 with the side watertight member 50 interposed therebetween. The side watertight material 50 is disposed so as to contact the side walls 93 and 94, respectively.

  One side 10 a in the longitudinal direction of the waterproof board 10 is arranged so as to coincide with the width direction of the passage 90, and the waterproof board 10 extends over almost the entire width of the passage 90. The waterproof board 10 does not have water absorption and water permeability, and its specific gravity is smaller than that of water. Therefore, the waterproof board 10 generates buoyancy in water. A specific configuration such as a material of the waterproof board 10 will be described later.

  Next, the joint part of the waterproof board 10 and the floor surface 91 will be described based on FIG. 3 showing the AA cross section of FIG. As shown in FIG. 3, the hinge 20 includes a pair of blade plates 21 and 22 that are rotatably coupled to each other via a shaft pin 23, and the blade plate 21 is coupled to the waterproof plate 10. The plate 22 is coupled to a base 92 that is integral with the floor surface 91. The hinge 20 extends in the width direction of the passage 90, and the blade 21 is connected to the waterproof plate 10 by a plurality of bolts 41 over the entire length of one side 10 a in the longitudinal direction of the waterproof plate 10. The vane plate 22 is coupled to the base 92 by a plurality of bolts 42. The waterproof plate 10 coupled to the blade plate 21 can rotate around a rotation shaft 23 a defined by the shaft pin 23, and the rotation shaft 23 a is parallel to the floor surface 91 and at a position along the width direction of the passage 90. It is fixed. Thereby, the waterproof board 10 rotates centering on the rotating shaft 23a extended in the width direction of the channel | path 90, and as shown in FIG.1 (b), it becomes possible to take a lying state and a standing state. In addition, since the position of the rotating shaft 23a is prescribed | regulated only by the hinge 20, it is easy to install so that the waterproof board 10 may rotate smoothly.

  In addition, although the bolt 41 which couple | bonds the blade 21 of the hinge 20 and the waterproof board 10 has penetrated the waterproof board 10 in the plate | board thickness direction, in the opposing position with the blade 21 which pinched | interposed the waterproof board 10, A backing material 43 is arranged. The backing material 43 supports a nut and prevents the waterproof board 10 from being locally compressed and depressed due to the fastening of the bolt.

  As shown in FIG. 3, a single watertight elastic membrane 30 is sandwiched between the hinge 20, the waterproof plate 10 and the base 92. The watertight elastic membrane 30 is formed by forming an elastic material having no water permeability into a film shape. Similar to the hinge 20, the watertight elastic membrane 30 has a length over the entire length of one side 10 a of the waterproof board 10. The watertight elastic membrane 30 is coupled to both the waterproof board 10 and the base 92 so as to cover the gap between the waterproof board 10 and the base 92 and be watertight. By fastening the bolts 41 and 42, the watertight elastic membrane 30 is pressed by the blade plates 21 and 22 so as to be in close contact with the waterproof plate 10 and the base 92, thereby ensuring watertightness in this portion. The material of the watertight elastic film 30 is preferably a synthetic rubber typified by neoprene rubber, but can be arbitrarily selected from an elastic material having no water permeability such as natural rubber.

  As shown in FIG. 3, the watertight elastic film 30 is provided with a slack between the waterproof board 10 and the base 92 when the waterproof board 10 is lying down. The presence of slack here prevents the watertight elastic membrane 30 from being excessively pulled as shown by the two-dot chain line in FIG. 3 even when the waterproof plate 10 is standing.

  The base 92 is a member provided to connect the hinge 20 and the floor surface 91 together. Therefore, the shape of the base 92 is not limited to the cross-section C type as in the present embodiment, and can be set to an arbitrary cross-sectional shape.

  Next, the joint part of the waterproof board 10 and the side part watertight material 50 is demonstrated based on FIG. 4 which showed the BB cross section of FIG. 2 is a cross section in the vicinity of the side wall 94 of the waterproof board 10, the cross section in the vicinity of the side wall 93 has the same configuration and is represented symmetrically with FIG. A side watertight material 50 is disposed on the upper surface 10 b of the waterproof plate 10, and a presser plate 51 is disposed on the side watertight material 50. The side watertight member 50 is made of an elastic body that does not have water permeability, and is curved as shown in the drawing so that a part thereof is in contact with the side wall 94. The side watertight material 50 has a length that extends over the short length of the waterproof board 10. That is, the side watertight material 50 covers the gap between the side walls 93, 94 and the waterproof board 10, thereby making this gap watertight. As the material of the side watertight material 50, a synthetic rubber typified by neoprene rubber is preferably used in the same manner as the watertight elastic membrane 30, but any material such as natural rubber that does not have water permeability can be used. Can be selected. Further, the cross-sectional shape of the side watertight material 50 is not limited to the open cross-sectional shape as shown in FIG. 4, and may be a closed cross-sectional shape.

  The presser plate 51 and the side watertight material 50 are coupled to the waterproof plate 10 by bolts 52. By fastening the bolts 52, the side watertight material 50 is pressed down by the presser plate 51 so as to be in close contact with the waterproof board 10, thereby ensuring watertightness in this portion. Note that a backing material 53 is disposed at a position facing the presser plate 51 with the waterproof plate 10 in between, and the waterproof plate 10 is locally compressed and depressed in the thickness direction due to fastening of bolts. Is preventing.

  Next, a specific configuration of the waterproof board 10 will be described with reference to FIG. FIG. 5 shows only the waterproof plate 10 in an upright state, broken down into its elements. The waterproof plate 10 is configured by stacking five plate pieces 11, 12, 13, 14, and 15 in the plate thickness direction. Each of the plate pieces 11 to 15 is made of a material obtained by reinforcing a foamed resin with inorganic fibers extending in one direction. In the present embodiment, a material obtained by reinforcing foamed urethane with glass fibers is selected. Such a material has high tensile / compressive strength and rigidity in the direction in which the inorganic fibers extend. This material can be easily processed such as drilling, and is preferably used as a material for the waterproof board 10 that needs to be coupled to the hinge 20. Moreover, the board pieces 11-15 are laminated | stacked using appropriate means, such as an adhesive agent, a nail, and a wood screw, and the waterproof board 10 is comprised.

  Among the plate pieces 11 to 15 constituting the waterproof plate 10 of the present embodiment, in the plate pieces 11, 13, and 15, those inorganic fibers are oriented parallel to one side 10 a of the waterproof plate 10, that is, inorganic The fiber extends in the width direction of the passage. On the other hand, in the board pieces 12 and 14, the inorganic fibers are directed in the direction perpendicular to the one side 10a of the waterproof board 10, that is, the inorganic fibers extend in the vertical direction in the standing state. The plate piece 11 and the plate piece 15 are plate pieces arranged on the outermost side in the thickness direction of the waterproof board 10, and face the upper surface 10 b and the lower surface 10 c of the waterproof board 10, respectively.

  Here, with reference to FIG. 1A, the stress when water pressure acts on the waterproof board 10 in a state where the waterproof board 10 is standing will be described. The waterproof plate 10 has the same bending behavior as a beam that is simply supported at both ends in the width direction of the passage (supported by the stoppers 93a and 94a), and a tensile stress in the width direction of the passage is generated on the upper surface 10b side by the bending moment. However, compressive stress in the width direction of the passage is generated on the lower surface 10c side.

  In the plate piece 11 and the plate piece 15 facing the upper surface 10b and the lower surface 10c, the inorganic fibers extend in the width direction of the passage, and the tensile / compression strength and rigidity in the width direction of the passage are high. Therefore, the waterproof board 10 has high strength and rigidity with respect to a bending moment caused by water pressure. When the water pressure acts on the waterproof plate 10 and the deflection occurs, the gap between the waterproof plate 10 and the side walls 93 and 94 is enlarged, and there is a possibility that water leakage occurs. However, the waterproof plate 10 of the present embodiment is high. Since it has rigidity, even when water pressure is applied, there is little deflection and there is little risk of water leakage.

  In this embodiment, the waterproof plate 10 is formed by stacking five plate pieces 11 to 15 so that the plate pieces whose fiber direction extends in the width direction and the plate pieces whose fiber direction extends in the vertical direction are alternately stacked. This prevents the waterproof plate 10 from warping or twisting. About the number of lamination | stacking and the direction of the inorganic fiber in each board piece, it can set arbitrarily.

  In addition, a striped steel plate can also be attached to the upper surface 10b of the waterproof board 10 as needed. Thereby, it becomes possible to reduce the damage given to the waterproof board 10 when the vehicle passes and to obtain an anti-slip effect. Moreover, what is attached to the upper surface 10b of the waterproof board 10 is not limited to a striped steel plate, Arbitrary protective materials, such as a flat steel plate, can be attached.

[Second Embodiment]
Next, a second embodiment of the buoyancy waterproof device according to the present invention will be described with reference to FIG. FIG. 6 is a schematic view of a buoyancy type waterproof device according to the second embodiment of the present invention, and is a schematic side view showing a state in which a waterproof plate is erected.

The buoyancy type waterproof device 100 according to the second embodiment is different from the first embodiment in that the support rod 60 is provided as a means for defining the position of the standing state of the waterproof board 10. The support rod 60 shown in FIG. 6 is provided so that the inside of the recessed part 91a of the floor surface 91 and the lower surface 10c of the waterproof board 10 may be couple | bonded. When the waterproof board 10 rotates counterclockwise from the lying state, the support bar 60 expands, and when the support bar 60 is fully extended, the position of the waterproof board 10 in the standing state is defined.
In the state where the waterproof plate 10 is lying down, the support bar 60 is folded and accommodated in the groove portion 91c provided in the support surface 91b inside the recess 91a, while the lower surface 10c of the waterproof plate 10 is the support surface of the recess 91a. Ground to 91b.

  A plurality of support bars 60 can be provided in the width direction of the passage. Without providing the stoppers 93a and 94a in the first embodiment, it is possible to define the position of the standing state only by the support bar 60, and it is also possible to use the stoppers 93a and 94a and the support bar 60 in combination. is there. By using the stoppers 93a, 94a and the support rod 60 in combination, the waterproof plate 10 can be installed in a wide passage. Further, it is possible to define the position of the waterproof board 10 in the standing state by connecting the floor surface 91 and the waterproof board 10 with a wire instead of the support bar 60.

[Other Embodiments]
Next, another embodiment of the buoyancy waterproof device according to the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a joint portion between a waterproof plate and a floor surface in another embodiment of the buoyancy waterproof device according to the present invention. The difference between the embodiment shown in FIG. 7 and the first embodiment is a joint portion between the waterproof board 10 and the floor surface 91.

  In the buoyancy type waterproof device 100 shown in FIG. 7A, a hinge 20 is coupled to the lower surface of the waterproof plate 10, and a watertight elastic membrane 30 is interposed between the hinge 20, the waterproof plate 10 and the base 92. doing. In the buoyancy waterproof device 100 shown in FIG. 7B, the hinge 20 is coupled to the upper surface of the waterproof plate 10, and the watertight elastic membrane 30 is coupled to the lower surface of the waterproof plate 10. The watertight elastic membrane 30 is pressed by the presser plates 44 and 45 and is in close contact with the waterproof plate 10 and the base 92. In the buoyancy type waterproof device 100 shown in FIG. 7C, the hinge 20 is coupled to the lower surface of the waterproof plate 10, and the watertight elastic membrane 30 is disposed under the hinge 20 and coupled by bolts 41 and 42. Yes. The watertight elastic membrane 30 is pressed by the press plates 44 and 45 and is in close contact with the hinge 20. In the buoyancy waterproof device 100 shown in FIG. 7D, the hinge 20 is coupled to the lower surface of the waterproof plate 10, and the watertight elastic membrane 30 is coupled to the upper surface of the waterproof plate 10. The watertight elastic membrane 30 is pressed by the presser plates 44 and 45 and is in close contact with the waterproof plate 10 and the base 92.

  In any of the embodiments shown in FIGS. 7A to 7D, the watertight elastic membrane 30 covers the gap between the waterproof board 10 and the base 92, and the waterproof board 10 and the base 92 are respectively provided. Closely connected. Here, the base 92 and the floor surface 91 are integrated. The waterproof plate 10 is supported by the hinge 20 so as to be rotatable with respect to the floor surface 91. Therefore, in any of the buoyancy type waterproof devices according to FIGS. 7A to 7D, the waterproof plate 10 can be smoothly rotated by the hinge 20 without requiring an operation of adjusting the positions of the plurality of members. Installation in the passage 90 is easy.

DESCRIPTION OF SYMBOLS 100 Buoyant waterproof device 10 Waterproof board 10a One side 10b Upper surface 10c Lower surface 11 Plate piece 12 Plate piece 13 Plate piece 14 Plate piece 15 Plate piece 20 Hinge 21 Blade plate 22 Blade plate 23 Shaft pin 23a Rotating shaft 30 Watertight elastic membrane 41 Bolt 42 Bolt 43 Back plate 44 Press plate 45 Press plate 50 Side sealant 51 Press plate 52 Bolt 53 Back plate 60 Support rod 90 Passage 91 Floor surface 91a Recess 91b Support surface 91c Groove portion 92 Base 93 Side wall 93a Stopper 94 Side wall 94a stopper

Claims (5)

A buoyancy type waterproof device that dams the water flowing through the passage with a waterproof plate that stands up by buoyancy,
A waterproof board having a specific gravity smaller than water;
A hinge that rotatably supports the waterproof plate around an axis of rotation parallel to the floor of the passage;
A watertight elastic membrane bonded in close contact with each of the waterproof plate and the floor surface so as to cover a gap between the waterproof plate and the floor surface;
The hinge has a pair of blades rotatably coupled to each other around the rotation axis;
One of the slats is coupled over the entire length of one side of the waterproof plate, and the other slat is coupled to the floor surface. 2. The buoyancy waterproof device according to claim 1, wherein the one blade plate and the other blade plate are respectively coupled to the waterproof plate and the floor surface with the watertight elastic membrane interposed therebetween. . A recess for accommodating the waterproof plate is provided on the floor surface,
The buoyancy waterproof device according to claim 2, wherein the top surface of the waterproof plate and the floor surface are at the same height in a state where the waterproof plate is accommodated in the recess. The said waterproof board is comprised by laminating | stacking the sheet piece formed by reinforcing the foamed resin with the inorganic fiber extended in one direction in the thickness direction. Buoyant waterproof device. The buoyancy type waterproof device according to claim 4, wherein the direction of the inorganic fibers of the two pieces of the plate arranged on the outermost side in the thickness direction is parallel to the one side of the waterproof plate.

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