JP4322697B2 - Inundation prevention device - Google Patents

Description

  The present invention relates to an inundation prevention device for preventing inundation from an opening portion such as an entrance / exit of an underground space such as an underground mall, a subway, an underground parking lot, a basement, and the like, an entrance / exit of a building, and an opening portion surrounded by at least a floor portion and both side portions. About. More specifically, the present invention relates to an apparatus for preventing flooding by developing a waterproof sheet member that is folded and stored along a floor and both sides at normal times by water pressure of water that is flooded during flooding.

  Conventionally, various devices have been developed for preventing inundation of underground spaces during heavy rains, floods, and the like. As one type of these flood prevention devices, there is a type in which a waterproof plate is raised and lowered. In this case, a waterproof board, which is normally lying on the floor as a stepping board, stands up and covers an opening during a flood to prevent water from entering the opening. However, since this waterproof board normally acts as a footboard, it is necessary to support the weight of the passing vehicle, and it is also necessary to stick a decorative tile etc. on it for walking, which increases its weight and makes it stand up It requires a lot of power.

  As this power, there are a hydraulic pressure, an electric motor, etc., but the structure is complicated and expensive, and maintenance is required, which increases the cost of installation and maintenance. Moreover, since such a thing requires electric power for the power of standing up a waterproof board, detection of inundation, etc., there exists a problem that it becomes impossible to operate when a power failure occurs during a flood.

  In addition, there is one that uses the buoyancy of the float as this power. Such a device is simple in structure, requires no power, and requires little maintenance. However, in order to raise a heavy waterproof sheet as described above, a large float is required, and the entire apparatus becomes large. For this reason, when installing such a waterproof device, it is necessary to excavate a large floor surface, which causes a problem such as an increase in the cost of installation work.

  As another type of the waterproof device, there is a type in which the opening is covered with a waterproof sheet to prevent water from entering. Such a device is simple in structure and can be made compact, but the operation of covering the opening by unfolding the waterproof sheet in the stored state is complicated, and many devices are manually deployed. There is also a type that stores a waterproof sheet under the floor, and pulls this waterproof sheet upward to deploy it, but such a thing has both edges of the waterproof sheet raised against both side walls of the opening. Since a mechanism for guiding and maintaining watertightness to withstand a load caused by water pressure is required, and a mechanism for pulling up the waterproof sheet is also required, the structure becomes complicated.

  In addition, there is also a type in which a bag body that is normally folded is inflated with high-pressure gas or the like to prevent flooding. However, such a structure also has a complicated structure and requires maintenance work such as pressure check of the high-pressure gas container.

  The inundation prevention device as described above must maintain a standby state without operating for a long period of time. For this reason, it may not work in the case of a flood, and it is preferable that the function can be maintained without depending on maintenance work if possible.

  The present invention has been made on the basis of the above circumstances, has a simple structure, is small in size, does not require external power such as electric power, can reduce the manufacturing cost and installation cost of the apparatus, and more essential. An inundation prevention device that has no moving parts and does not require maintenance work other than inspection of material deterioration is provided.

The inundation preventing device of the present invention described in claim 1 includes a waterproof sheet member formed of a flexible sheet-like material attached to both sides and a floor of the opening to be prevented from being infiltrated. The waterproof sheet member has a bag shape having a side wall portion and a bottom wall portion, and both side edges of the side wall portion of the waterproof sheet member are attached to both side portions of the opening portion while maintaining watertightness, and the above waterproof sheet The front edge portion of the bottom wall portion of the member is attached to the floor portion while maintaining the water tightness across the floor portion of the opening portion, and the peripheral length of the upper edge of the side wall portion of the waterproof sheet member is increased. Lt, Lb is the circumference of the joint between the side wall and the bottom wall, H is the height of the portion where the side wall is attached to both sides of the opening, and the width of the opening Is W,
Lt ≧ 2H + W (1)
Lb> Lt (2)
It is what.

  The peripheral length of the upper edge portion of the side wall portion of the waterproof sheet member is larger than the sum of the relationship of the above formula (1), that is, the width W of the opening and twice the mounting height H on both sides. Therefore, when the side wall portion and the bottom wall portion are folded in the vertical direction and the front side, the length of the folded waterproof sheet member in the width direction is equal to the width W of the opening and the mounting height of the side wall portion. It becomes longer than the sum of the two times. Therefore, the folded side wall portion and bottom wall portion can be normally stored in storage grooves formed on the floor portion and both side portions of the opening portion, and do not hinder the passage of the opening portion.

  In addition, in the event of a flood or the like, water flows into the folded bag-shaped waterproof sheet member. In this case, since the side wall portion of the waterproof sheet member is longer in the peripheral length Lb of the joint portion with the lower edge portion, that is, the bottom wall portion, than the peripheral length Lt of the upper edge portion, the waterproof sheet member has a downwardly bulging shape. It has a bag shape, and the side wall has a shape that swells upward. For this reason, when water flows into the inside of the bag-shaped waterproof sheet member, the side wall portion is pushed up by the water pressure, and the waterproof sheet member develops into a bag shape curved from the opening to the back side. Also, if the water level rises, the upper edge of the side wall is pushed up and expanded by that amount, so even if the water level rises to the mounting height H of this side wall, the water from the opening will be submerged. Can be prevented.

  This waterproof device has a simple structure as described above, and the device can be made compact, and since no external power is required for operation, the waterproof device will not become inoperable due to a power failure or the like. In addition, the waterproof parts are the only functional parts that prevent infiltration, and there are no moving parts. Therefore, it is essentially only necessary to inspect the tear sheet material for tears and deterioration, and the maintenance cost is low and the reliability is high. .

  Further, in the inundation preventing device of the present invention according to claim 2, a float member that raises the upper edge portion of the side wall portion at the initial stage of inundation is attached to the upper edge portion of the side wall portion of the waterproof sheet member. It is characterized by this. Therefore, at the initial stage of flooding, the float member is lifted, the upper edge portion of the side wall portion of the waterproof sheet member is lifted, and water surely flows into the bag-shaped waterproof sheet member. Can be deployed.

  According to a third aspect of the present invention, there is provided the inundation preventing device according to the present invention, wherein the side wall portion of the waterproof sheet member has a double side wall portion of an outer wall portion and an inner wall portion, and is provided under the outer wall portion. The edge portion is joined to the peripheral edge portion of the bottom wall portion, and both front edge portions of the outer wall portion are attached to both sides of the opening portion while maintaining watertightness. And the upper edge portion of the inner wall portion is integrally continuous, and the lower edge portion of the inner wall portion is joined to the peripheral edge portion of the upper wall portion made of a flexible and waterproof sheet material. The upper edge of the outer wall portion and the inner wall portion correspond to the circumferential length Lt of the upper edge portion of the side wall portion, and the waterproof sheet member has the outer wall portion and the inner wall portion. It is overlapped, folded in a state where the bottom wall portion and the upper wall portion are overlapped, and stored in the storage groove, and the storage groove A treadle float member is provided to cover the upper opening. The treadle float member withstands the load of the vehicle or pedestrian passing through the housing groove and has a buoyancy that floats on water. The treadle float member moves up and down. It is guided freely, and the front edge portion of the upper wall portion is joined to the tread board float member.

  Therefore, this waterproof sheet member has a double bag shape, and when the water is flooded, the above-mentioned tread board float member floats, so that water enters the double bag-shaped waterproof sheet, and this waterproof sheet member Unfold the sheet member. Therefore, the development of the waterproof sheet member is sure. In addition, since there is an upper wall member, when the waterproof sheet member is deployed and prevents water from entering, the water in the waterproof sheet member is reliably prevented from getting over the side wall, and the waterproof sheet member Since the water is not visible, it can give the user a sense of security.

  According to a fourth aspect of the present invention, there is provided the inundation preventing apparatus according to the present invention, wherein column members are provided so as to protrude upward on both sides of the tread board float member, and the inner wall is provided on the column member. The front edge part of the upper part is attached with water-tightness at the part below 1 / 2H from the bottom, and the front edge part of the upper wall part is attached with water-tightness to the tread board float member. ing. Therefore, even when the above-mentioned tread board float member is not sufficiently lifted at the initial stage of flooding, it is possible to prevent water from entering from the left and right corners onto the upper wall portion of the waterproof sheet member.

  Further, according to the fifth aspect of the present invention, there is provided the inundation preventing device according to the present invention, wherein the outer wall portion and the inner wall portion have a shape in which the height decreases as they go deeper, and these outer walls are in a state where the waterproof sheet member is deployed. A side wall part is comprised by a part of an upper part, an inner side wall part, and the said upper wall part. Therefore, the structure of the waterproof sheet member is simple and easy to manufacture, and the amount of the waterproof sheet material used is small, and the waterproof sheet can be folded smaller. The dimensions can be reduced.

  The inundation prevention device of the present invention according to claim 1 can be stored compactly in storage grooves formed on the floor and both sides of the opening in a normal state. Water flows into the inside of the water-proof waterproof sheet member and automatically expands. Therefore, the waterproof device has a simple structure and the device can be made compact, and since no external power is required during operation, the waterproof device does not become inoperable due to a power failure or the like. In addition, the waterproof parts are the only functional parts that prevent infiltration, and there are no moving parts. Therefore, it is essentially only necessary to inspect the tear sheet material for tears and deterioration, and the maintenance cost is low and the reliability is high. .

  Further, in the inundation preventing device according to the second aspect of the present invention, the float member is lifted at the initial stage of the inundation, and the upper edge portion of the side wall portion of the waterproof sheet member is lifted, and the bag-shaped waterproof sheet member is surely provided. Water flows in, and this waterproof sheet member can be reliably deployed.

  Further, in the inundation preventing device according to the third aspect of the present invention, the waterproof sheet member has a double bag shape, and the tread board float member floats up when the water is submerged. Water enters the waterproof sheet, and the waterproof sheet member is developed. Therefore, the development of the waterproof sheet member is sure. In addition, since there is an upper wall member, when the waterproof sheet member is deployed and prevents water from entering, the water in the waterproof sheet member is reliably prevented from getting over the side wall, and the waterproof sheet member Since the water is not visible, it can give the user a sense of security.

  Further, in the inundation preventing device of the present invention according to claim 4, even when the tread board float member is not sufficiently lifted up at the initial stage of inundation, the left and right corners are placed on the upper wall portion of the waterproof sheet member. Water can be prevented from entering.

  Further, the inundation preventing device of the present invention according to claim 5 has a simple structure of the waterproof sheet member, is easy to manufacture and requires less amount of the waterproof sheet material to be used. Since it can be folded small, the dimension of the groove part which accommodates this can be made small.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the present invention. In addition, although the thing of this 1st Embodiment is a simplified type as an actual inundation prevention apparatus, in order to demonstrate the principle of this invention more simply, it demonstrates as 1st Embodiment.

  In the figure, 1 is an entrance to an underground space such as an underground parking lot or a basement, that is, an opening. The opening portion 1 includes a floor surface, that is, a floor portion 2 and both side portions 3 such as both side walls. The opening portion 1 is provided with the water immersion prevention device 10 according to the first embodiment of the present invention. Reference numeral 11 denotes a main body, which is composed of a bottom groove member 12 and a side groove member 13 having a substantially U-shaped cross section. The bottom groove member 12 and the side groove member 13 are embedded in the floor portion 2 and both side portions 3 of the opening 1 while maintaining watertightness, and a storage groove for storing the waterproof sheet member is formed.

  A folded waterproof sheet member 20 is housed in the bottom groove member 12 and the side groove member 13 of the main body 11. The waterproof sheet member 20 is formed of a flexible and waterproof sheet-like material, for example, a woven fabric of synthetic fiber having a waterproof coating, and its unfolded state is formed as shown in FIG. . That is, the waterproof sheet member 20 includes a substantially semicircular bottom wall portion 21 and a side wall portion 22 and has a substantially semicircular or arcuate bag shape. The peripheral edge portion of the bottom wall portion 21 and the lower edge portion of the side wall portion 22 are joined to form a joined portion 23.

The dimensions of each part of the waterproof sheet member 20 are such that the peripheral length of the upper edge portion of the side wall portion 22 is Lt, the peripheral length of the joint portion 23 with the lower edge portion, that is, the bottom wall portion 21, is Lb, When the width of 1 is W, and the height of the attachment portion between both front edge portions 24 of the side wall portion 22 and both side portions 3 of the opening portion 1 is H,
Lt ≧ 2H + W (1)
Lb> Lt (2)
It is set to become.

  The front edge portion 25 of the bottom wall portion 21 of the waterproof sheet member 20 is attached to the bottom groove member 12 of the main body portion 11 while maintaining watertightness over the entire width W thereof. The portion 24 is attached to the side groove member 13 while maintaining watertightness up to the portion of the attachment height H.

  A plurality of float members 30 are attached to the upper edge portion of the side wall portion 22 of the waterproof sheet member 20. These float members 30 are formed in dimensions that can be accommodated in the bottom groove member 13 described above, and those having a relatively short length are attached with a gap therebetween, and the flexibility of the side wall portion 22 is increased. It is configured not to be damaged. Since these float members 30 provide buoyancy, they are naturally attached to the front side of the side wall portion 22, that is, the inundation side in the event of a flood or the like.

  In this embodiment, a lid member 31 is attached on these float members 30. The lid member 31 covers the upper opening of the bottom groove member 13 when the waterproof sheet member 20 and the float member 30 are housed in the bottom groove member 13, and allows a vehicle or a pedestrian to pass therethrough. Is possible. The float member 30 has sufficient buoyancy to float in water together with the lid member 31.

  As shown in FIG. 3 and FIG. 4, in the flood prevention device according to the first embodiment, the waterproof sheet member 20 has a bottom wall portion 21 and a side wall portion 22 in the vertical direction and the back-front direction. The bottom groove member 12 and the side groove member 13 are accommodated in a folded state. In this case, the bottom wall 21 is folded and accommodated in the bottom groove member 12 as it is. Further, since the side wall portion 22 has the dimension of the above-described formula (1), when it is folded up and down, the width W of the opening portion 1 in the width direction, that is, the width W of the bottom groove member 12 and the side groove member 13 It has a size that is twice the sum of the mounting height H. That is, of the waterproof sheet member 20, the portion farthest from the bottom groove member 12, that is, the peripheral length of the upper edge portion of the side wall portion 22 has sufficient dimensions along the both side groove members 13 and the bottom groove member 12. Therefore, the entire waterproof sheet member 20 is folded and accommodated in the bottom groove member 12 and the side groove members 13 on both sides. The float member 30 is also accommodated in the bottom groove member 12. In this state, the opening surfaces of the bottom groove member 12 and the side groove member 13 are covered with the lid member 31.

  In such a normal time, since the opening surface of the bottom groove member 12 is covered with the lid member 31, a vehicle or a pedestrian can freely pass over this, and the waterproof sheet member 20 is protected.

  In the case of a flood or the like, the water flowing on the floor flows into the bottom groove member 12. And if water accumulates in this bottom groove member 12, said float member 30 will float with the cover member 31 with the buoyancy, and will pull up the upper edge part of the side wall part 22 of a waterproof sheet member. Thereby, water flows into the bag-shaped waterproof sheet member 20.

  Due to the pressure of the water that has flowed in, the lower portions of the bottom wall portion 21 and the side wall portion 22 are first developed rearward along the floor surface. In this case, the waterproof sheet member 20 is formed in the shape of the above-described formula (2), and forms a bottom-swelled bag shape. Therefore, as the water level rises, the side wall portion 22 is pushed up by the water pressure as shown in FIGS. 1 and 2, and rises with the water level. In the case of this embodiment, the upper edge portion of the side wall portion 22 is also pulled up by the buoyancy of the float member 30 described above. In this state, a horizontal component force Fh and an upward component force Fv due to water pressure act on the side wall 22. The horizontal component force Fh develops the side wall portion 22 in an arc shape and is supported by a mounting portion between the front edge portion 24 of the side wall portion 22 and the side groove member 13. On the other hand, the upward component force Fv is supported by the load Fb caused by the hydraulic pressure acting on the bottom wall 21 by pushing up the side wall 22 upward as described above. Therefore, the side wall portion 22 is maintained in the extended state rising upward, and water does not get over the upper edge portion. This state continues until the water level rises to the height of H, and this inundation prevention device blocks inundation to the height of H and prevents inundation from the opening portion 1 to the underground space.

  Generally, a flexible weir, that is, a bag-like body made of a flexible sheet material is installed across the riverbed, and the bag-like body is inflated with water pressure or the like and the water is dammed by the internal water pressure. Is low, a phenomenon called a so-called V notch or the like occurs in which the center portion is bent downward in a V-shape and water cannot be blocked. However, in this embodiment, since the entire side wall portion 22 is always pushed up by the water pressure as described above, such a phenomenon does not occur, and the water is surely dammed to prevent water from entering. . The above-described equation (2) is a condition for causing such an action.

  In the embodiment as described above, the waterproof sheet member 20 automatically expands due to the water pressure of the submerged water, and the side wall 22 automatically rises as the water level rises. No mechanism or power is required and its reliability is high. Moreover, since the waterproof sheet member 20 can be folded and stored, the dimensions of the bottom groove member 12 and the side groove member 13 are small, and the construction is easy. Further, since no complicated mechanism or power unit is required, the manufacturing cost is reduced. Further, the maintenance and inspection can be performed only by checking the deterioration of the material of the waterproof sheet member 20, and the maintenance is easy.

  In this embodiment, when the opening is large and the apparatus is large, a separate lid member is provided on the bottom groove member 12 and the side groove member 13 so that the lid member can be opened and closed. The waterproof sheet member 20 may be developed by opening the member.

  5 to 7 show a second embodiment of the present invention. In this embodiment, the development of the waterproof sheet member is made more reliable, and water that has been submerged is reliably prevented from getting over the waterproof sheet member. In the second embodiment, portions corresponding to those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In this embodiment, the side wall portion of the waterproof sheet member 20a is composed of a double side wall portion of an outer wall portion 22a and an inner wall portion 22b. These outer wall portion 22a and the upper edge portion of inner wall portion 22b are overlapped with each other, or one sheet-like material is folded back at the upper edge portion so that outer wall portion 22a and inner wall portion 22b are joined. The upper edge portions of the outer wall portion 22a and the inner wall portion 22b are substantially integrated. And the lower edge part of said outer side wall part 22a is joined to the peripheral part of the bottom wall part 21 like the said 1st Embodiment, maintaining watertightness, and both the front edge parts 24 are the above-mentioned. It is attached to the side groove members 13 on both sides while maintaining watertightness over a range of H height. Further, the front edge portion 25 of the bottom wall portion 21 is attached to the bottom groove member 12 while maintaining watertightness, as in the first embodiment. In this embodiment, the dimensional relationship between the outer wall portion 22a and the bottom wall portion 21 is the same as that in the first embodiment.

  Further, in this embodiment, an upper wall portion 40 having substantially the same shape as the bottom wall portion 21 is provided, and the upper wall portion 40 is also formed of a flexible and waterproof sheet-like material. Yes. And the lower edge part of said inner wall part 22b is joined to the peripheral part of this upper wall part 40. As shown in FIG.

  In this embodiment, a tread board float member 41 is provided. The tread board float member 41 has a length corresponding to at least the full width of the opening 1, that is, the length of the bottom groove member 12. And this tread board float member 41 is provided with the float member 42 and the tread board member 43 attached to the upper surface. And this float member 42 is formed in the dimension which can be accommodated in said bottom groove member 12, and tread member 43 covers the upper surface opening of this bottom groove member 12, and a vehicle or a pedestrian can pass on this It is like that. In addition, when this float member 42 is accommodated in the bottom groove member 12, the said storage sheet member 20a is folded and the accommodation space which can be accommodated is formed. The float member 42 has sufficient buoyancy to float together with the tread plate member 43.

  Further, both end portions of the tread board float member 41 are extended into the side groove member 13 and are guided by a guide member 45 provided in the side groove member 13 so as to be movable up and down. A pair of column members 46 are erected upward at both ends of the tread board float member 41. And both front edge parts of said inner wall part 22b are attached to this pillar member 46, respectively, maintaining the watertightness over the part below the height of H / 2 from the bottom.

  In such an embodiment, the waterproof sheet member 20a forms a complete double bag shape with the bottom wall portion 21, the outer wall portion 22a, the inner wall portion 22b, and the upper wall portion 40. Therefore, in the case of flooding, the tread board float member 41 is lifted by the water that has entered the bottom groove member 12, so that the upper wall portion 40 is lifted, and water enters the inside of the double bag-shaped waterproof sheet member 20 a. Then, the waterproof sheet member 20a is reliably developed. Therefore, before the waterproof sheet member 20a is deployed, water is surely prevented from getting over the upper edge of the outer wall portion 22a and entering the opening. Further, in this embodiment, since the lower part of the inner wall portion 22b is attached to the column portions 46 at both ends of the tread board float member 41 while maintaining watertightness, the tread board float member 41 is sufficiently provided in the initial stage of flooding. Even when not floating, water does not get over the inner wall portion 22b and the upper wall portion 40 from the corners on both sides.

  In this embodiment, the waterproof sheet member 20a has a complete double bag shape, and the upper surface of the waterproof sheet member 20a is covered by the upper wall portion 40 in a state where the waterproof sheet member 20a is unfolded and prevented from being flooded. It is reliably prevented that the water in the waterproof sheet member 20a gets over the side wall and enters the opening. Moreover, since the water which flowed into the inside of this waterproof sheet member 20a cannot be seen, anxiety is not given to the user. In this embodiment, even if the water level rises to the height of the inundation prevention, that is, the height of H, water pressure does not act on the inner wall portion 22b and the upper wall portion 40, and these are in a relaxed state. No load caused by water pressure acts on the float member 41. Therefore, the guide member 45 that guides both end portions of the tread board float member 41 so as to move up and down does not need to support the load, and the tread board float member 41 does not need bending strength to withstand the load caused by water pressure. Therefore, these have a simple structure and are less likely to cause malfunctions such as catching.

  8 to 12 show a third embodiment of the present invention. In this embodiment, the structure of the waterproof sheet member 20a in the second embodiment is simplified, and the volume when folded is reduced. That is, in the second embodiment, the waterproof sheet member 20a has a double structure. Therefore, when the sheet is folded, the volume increases.

  In the third embodiment, the outer wall portion 22c and the inner wall portion 22d of the waterproof sheet member 20b have two substantially triangular shapes whose heights decrease toward the back. In the expanded state, the upper wall portion is inclined with respect to the bottom wall portion 20, so that the outer wall shape of the upper wall portion 40 a is elliptical. Except for the points described above, the third embodiment is substantially the same as the second embodiment.

  In the case of this embodiment, in the case of flooding, the tread board float member 41 floats and rises as in the second embodiment, and water flows into the double bag-shaped waterproof sheet member 20b. The waterproof sheet member 20b is developed with the water pressure as shown in FIG. In this case, since the height of the outer wall portion 22c and the inner wall portion 22d is low in the depth of the waterproof sheet member 20b, when the water level rises, a part of the side wall portion that dams up the water by the upper wall portion 40a. Act as a part.

  In this case, the above-mentioned formula (2), that is, the side wall is pushed up by the water pressure, the horizontal component force by the water pressure is supported by the attachment portion between the side wall and the side groove member, and the side wall is moved upward by the upward component force. The “upper edge circumferential length Lt” of the side wall under the condition of being raised and maintained in the extended state is a side wall constituted by a part of the outer wall 22c, the inner side wall 22d, and the upper wall 40a. This is the circumference of the part where the part is in contact with the water surface. FIGS. 11 and 12 show a side view and a plan view schematically showing a state in which the waterproof sheet member 20b is fully expanded upward, and an outer wall portion 22c and an inner wall portion for easy explanation. Although 22d is developed so that it may be arranged on one curved surface, of course, it does not develop in this way in an actual inundation prevention device, and the inner wall 22d and the upper wall 40a are in a slack state as described above. It is. It is. In these drawings, the circumferential length of the portion in contact with the water surface, that is, abcd shown in these drawings is the circumferential length Lt, and if this satisfies the expression (2), the side wall portion as described above Can be maintained. Therefore, in the present specification, in the case where the “side wall portion” that acts to block water in the deployed state is constituted by a plurality of portions, Lt in this equation (2) is the circumference as described above. .

  As is apparent from the figure, in this embodiment, the circumferential length Lt represented by abcd is always smaller than Lb at an arbitrary height position, and therefore equation (2) is always satisfied. The Even if the water level rises to the position of H, water pressure does not act on the upper wall portion 40a and the like on the water surface, and these are in a relaxed state, so as in the case of the second embodiment, the tread board A load caused by water pressure does not act on the float member 41.

  In this embodiment, the structure of the waterproof sheet member 20b is simple, the area of the waterproof sheet material to be used is small, the storage volume when the waterproof sheet member 20b is folded can be reduced, and the cost is also low. To reduce. Other features are the same as in the case of the second embodiment.

  In addition, this invention is not limited to said embodiment. For example, in each of the above-described embodiments, in order to facilitate understanding, each part such as the side wall portion and the bottom wall portion of the waterproof sheet member is configured from a separate sheet member and joined thereto. This part may be an integral part of the sewing. Moreover, the structure of the groove part which accommodates a waterproof sheet member, and the structure of a float member are not necessarily limited to said embodiment. Further, if the side wall portion of the waterproof sheet member is formed of a floating sheet member whose specific gravity is smaller than that of water, this float can be omitted.

The perspective view of the expansion | deployment state of the water immersion prevention apparatus of the 1st Embodiment of this invention. Sectional drawing which follows the 2-2 line of FIG. The perspective view of the folding state of the water immersion prevention apparatus of 1st Embodiment. Sectional drawing which follows the 4-4 line of FIG. The perspective view of the deer prevention apparatus of the 2nd Embodiment of this invention. Sectional drawing which follows the 6-6 line of FIG. Sectional drawing equivalent to FIG. 6 in an unfolded state. The perspective view of the deer prevention apparatus of the 3rd Embodiment of this invention. Sectional drawing which follows the 9-9 line of FIG. Sectional drawing equivalent to FIG. 9 in an unfolded state. The side view which shows typically the waterproofing sheet member of an unfolding state. The top view which shows typically the waterproofing sheet member of an unfolding state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening part 10 Infiltration prevention device 12 Bottom groove member 13 Side groove member 20 Waterproof sheet member 21 Bottom wall part 22 Side wall part 30 Float member 20a Waterproof sheet member 22a Outer side wall part 22b Inner side wall part 40 Upper wall part 41 Tread board float member 46 Column Member 20b Waterproof sheet member 22c Outer wall portion 22d Inner wall portion 40a Upper wall portion

Claims (5)

A waterproof sheet member formed of a flexible and waterproof sheet-like material attached to both sides and a floor of an opening to be prevented from being flooded is provided. The waterproof sheet member has at least a side wall and a bottom wall. It forms a bag, and both front edge portions of the side wall portion of the waterproof sheet member are attached to both sides of the opening portion while maintaining watertightness, and the front edge portion of the bottom wall portion of the waterproof sheet member is the above-mentioned The floor portion of the opening portion of the waterproof sheet member is attached to the floor portion while maintaining watertightness. The peripheral length of the upper edge portion of the side wall portion of the waterproof sheet member is Lt, and the side wall portion and the bottom wall portion are When the peripheral length of the joint portion is Lb, the height of the portion where the side wall portion is attached to both sides of the opening portion is H, and the width of the opening portion is W,
Lt ≧ 2H + W (1)
Lb> Lt (2)
In a normal case, the inundation preventing device is folded and accommodated in a housing groove formed on the floor and both sides of the opening, and is developed by the pressure of water entering during the inundation.   2. The inundation preventing apparatus according to claim 1, wherein a float member is attached to an upper edge portion of the side wall portion of the waterproof sheet member to raise the upper edge of the side wall portion in the initial stage of water immersion.   The side wall portion of the waterproof sheet member has a double side wall portion of an outer wall portion and an inner wall portion, and the lower edge portion of the outer wall portion is joined to the peripheral edge portion of the bottom wall portion. In addition, both front edge portions of the outer wall portion are attached to both sides of the opening portion while maintaining watertightness, and the outer wall portion and the upper edge portion of the inner wall portion are integrally continuous. The lower edge of the inner wall is joined to the peripheral edge of the upper wall made of a flexible and waterproof sheet material, and the upper edge of the outer wall and the inner wall is This waterproof sheet member corresponds to the peripheral length Lt of the upper edge portion of the side wall portion, the outer wall portion and the inner wall portion are overlapped, and the bottom wall portion and the upper wall portion are Are folded and stored in the receiving groove, and a tread float member is provided to cover the upper opening of the receiving groove. The treadle float member can withstand the load of a vehicle or a pedestrian passing through the accommodation groove and has a buoyancy that floats on water. The treadle float member is guided so as to be movable up and down. The infiltration prevention device according to claim 2, wherein the front edge portion is joined to the tread board float member.   On both sides of the tread board float member, pillar members are provided so as to project upward. The pillar member has a front edge portion of the inner wall portion that is 1 / 2H or less below the front edge portion. 4. The inundation prevention device according to claim 3, wherein the watertightness is attached and the front edge of the upper wall portion is attached to the tread board float member while maintaining watertightness.   The outer wall portion and the inner wall portion have a shape that decreases in height as they go deeper, and when the waterproof sheet member is deployed, the outer wall portion, the inner wall portion, and a portion of the upper wall portion are side wall portions. The infiltration prevention device according to claim 3, wherein:

Images