Waterproof board device

Abstract

To take measures when an excessive downward load is applied to a waterproof plate in the upward movement state, in the waterproof plate that moves up from a first underground partition room to close an opening based on the increase in the weight of a water collection bucket due to water collection and provided with downward movement control means to regulate the inadvertent downward movement of the waterproof plate that has moved up.SOLUTION: Assuming that downward movement control means 18 is provided with a downward movement allowance mechanism, when an excessive downward load is applied to a waterproof plate 2, the downward movement regulation by the downward movement control means 18 is released and the waterproof plate 2 is configured to allow the downward movement.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to the technical field of water blocking board devices for preventing water from entering buildings through openings such as entrances and exits. [Background technology]

[0002] Conventionally, waterproof board devices have been known that use waterproof boards to waterproof openings such as entrances and exits in order to prevent water that overflows outside the openings, such as entrances and exits, from entering buildings or parking lots through the openings during overflow caused by heavy rain or flooding. One such waterproof board device is configured to prevent water intrusion by changing the waterproof board from an open position, in which it is stored in an underground space formed at the opening, to a closed position in which it moves upward to close the opening.In this case, it has been proposed to connect the waterproof board to a water collection bucket arranged in the underground space so that it can move up and down freely, via an operating chain, and to automatically move the waterproof board from the open position upward (raise) to the closed position in response to an increase in weight due to water overflowing outside the opening being collected in the water collection bucket (see, for example, Patent Document 1). Under normal circumstances, the weight of the waterproof board exceeds the weight of the empty water collection bucket, so the waterproof board is stored in the underground space and is in an open position with the opening open, but when heavy rain occurs and water overflows and collects in the water collection bucket, increasing its weight and exceeding the weight of the waterproof board, the water collection bucket automatically moves down and the waterproof board moves up to stop the water from flowing. In the water blocking board device configured as described in Patent Document 1, it is assumed that water will enter and remain in the underground space in which the water collecting bucket is disposed. In this case, not only when the water collecting bucket floats on the accumulated water, but even when it sinks, the weight of the water in the water collecting bucket is not reflected, and the weight of the water blocking board will prevail, causing the water blocking board that has moved up in the event of overflow to move down (sink) inadvertently. To prevent this from happening, drainage means are provided to drain water that has accumulated in the underground space; however, if more water than expected enters the underground space, the drainage means will not be able to drain it in time and the water will accumulate in the underground space.If water accumulates in the underground space in this way, the downward force based on the water being collected in the water collection bucket, as mentioned above, will no longer work, and there is a risk that a waterproof board in a closed position, or a waterproof board moving upward, will descend. Therefore, in the above-mentioned Patent Document 1, a downward movement restricting means is provided to restrict such inadvertent downward movement of the waterproof board. This downward movement restricting means includes a restricting sprocket that rotates integrally with the sprocket on which the operating chain is hung, and a restricting arm having a locking claw (locking projection) that engages with and can be disengaged from the restricting sprocket, and the locking claw is configured to engage in a so-called one-way direction that allows rotation of the restricting sprocket on the waterproof board's upward movement side but restricts rotation on the downward movement side, thereby restricting inadvertent downward movement of the waterproof board that has moved upward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6092585 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the downward movement regulating means is always set to a regulating state in preparation for unexpected overflow, in this set state, it is envisaged that, for example, the descent of the waterproof board will be restricted by the descent regulating means when the waterproof board has moved slightly (for example, one to a few centimetres) above the road surface. If this occurs, a heavy object such as a truck may pass over the waterproof board in the upward moving state, exerting excessive downward force on the waterproof board, which may result in undue load being applied to the operating system, such as the operating chain, causing deformation or damage to these. In addition, since the conventional system restricts the downward movement of the waterproof board by having a locking claw mesh with a regulating sprocket, the locking claw can sometimes bite deeply into the teeth of the regulating sprocket.In such a case, when attempting to release the downward restriction by operating the regulating arm, it is anticipated that a problem will arise in which it will be difficult to remove the locking claw that has bitten deeply into the teeth.These are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention has been created in view of the above-mentioned circumstances and with the objective of solving these problems. The invention of claim 1 relates to a water blocking board device comprising an underground space formed underground of an opening such as a doorway, a water blocking board which moves upward from an open position stored in the underground space to a closed position for closing the opening to prevent the intrusion of water that has overflowed outside the opening, and a water collecting bucket which is arranged in the underground space so as to be able to move up and down and which is linked to the water blocking board via an operating chain and which moves downward in response to an increase in weight due to the collection of water that has overflowed outside the opening, thereby moving the water blocking board from the open position upward to the closed position, wherein a downward movement restricting means for restricting the downward movement of the water blocking board which has moved upward to the closed position is provided in the operating path of the operating chain, the downward movement restricting means is configured to include a restricting sprocket that can be engaged with the operating chain, a restricting shaft that rotatably supports the restricting sprocket, a one-way rotation clutch unit that restricts the rotation of the restricting shaft in the downward movement direction of the water barrier plate but allows the rotation in the upward movement direction, and a torque limiter that, in a state in which the rotation of the restricting shaft in the downward movement direction of the water barrier plate is restricted by the one-way rotation clutch unit, restricts the rotation of the restricting sprocket in the downward movement direction of the water barrier plate by integrating the restricting sprocket with the restricting shaft when the load in the downward movement direction of the water barrier plate is smaller than a predetermined load, but allows the rotation of only the restricting sprocket in the downward movement direction of the water barrier plate when the load in the downward movement direction of the water barrier plate is larger than the predetermined load, and the restricting sprocket, the one-way rotation clutch unit and the torque limiter that constitute the downward movement restricting means are assembled coaxially to the restricting shaft. The waterproof board device is characterized by the above. Claim 2 The invention of the present invention is provided with a deceleration means in the operating path of the operating chain for decelerating the speed of the up and down movement of the water blocking board, Torque limiter The downward movement restricting means is disposed on the side of the operating path where the water blocking board moves downward with respect to the deceleration means. 1 Description It is a waterproof board device. Effect of the Invention

[0006] By adopting the invention of claim 1, the water blocking board in the open position housed in the underground space can be automatically raised to the closed position by the weight of the water collecting bucket, which becomes heavy as the water overflows and collects the water, to close the opening. In addition, the downward movement restriction means can restrict the inadvertent downward movement of the raised water blocking board. However, when an excessive load is applied to the water blocking board in the downward movement direction, the restricted downward movement Torque limiter This allows the operating system, such as the operating chain, to be prevented from being deformed or damaged. Also, Since it is constituted by a torque limiter, the structure can be simplified and it can be easily attached to the downward movement restricting means. moreover, Since the downward movement restricting means is provided with a restricting sprocket that meshes with the operating chain, it is possible to avoid the inconvenience of the locking claw digging in too deeply as in the conventional case when restricting downward movement. Claim 2 By making it an invention of Torque limiter The downward movement regulating means is arranged on the operating path on the side where the waterproof board moves downward, relative to the deceleration means which slows down the up and down movement speed of the waterproof board to ensure smooth deformation of the waterproof board.As a result, if an excessive load is applied when attempting to move the waterproof board downward, the excessive load is prevented from acting directly on the deceleration means, and the deceleration means side is protected. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] 2 is a schematic perspective view of a water blocking board device showing a water blocking board in an open position. FIG. [Diagram 3] 4 is a side cross-sectional view showing the water blocking board of the water blocking board device in an open position. FIG. [Figure 4] 4 is a side cross-sectional view showing the water blocking board of the water blocking board device in a closed position. FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 4 is a vertical cross-sectional view of a downward movement restricting means. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 denotes a waterproof board device installed at an opening E such as a gate-shaped entrance sandwiched between waterproof bodies X provided to prevent water from entering a fence or building wall, and the waterproof board device 1 is configured to store a waterproof board 2 in an open position in an underground space S formed underground at the opening E, and the underground space S is surrounded by a bottom plate 3, left and right side plates 4, and front and rear side plates 5, and a first and second partition chamber S1, S2 are formed by partitioning the front and rear by a partition plate 6 supported between the left and right side plates 4, and the first partition chamber S1 on the inside of the building is configured as a waterproof board pit in which the waterproof board 5 in an open position is stored, and the second partition chamber S2 on the outside of the building is configured as a bucket pit in which a water collecting bucket 7 serving as a cone for automatically opening and closing the waterproof board 5 is stored.

[0009] On the other hand, on both the left and right sides of the opening E, there are provided gateposts 8 which continue from the left and right side panels 4 and protrude upward from the road surface, and the gatepost 8 is provided with an operating means for moving the waterproof board 2 up and down, and a pair of first and second operating sprockets 9, 10 which constitute the operating means are rotatably supported at the upper end of the gatepost 8. An operating chain 12, one end of which is connected to the upper end of the waterproof board 2, extends upward from the waterproof board 2, is wound around the first operating sprocket 9 on the inside of the building and the second operating sprocket 10 on the outside of the building, extends downward, and is wound around floating sprockets 11 which are rotatably provided at both the left and right ends of the water collecting bucket 7, and extends upward, and the other end of the operating chain 12 thus wound is connected to a locking portion 8a provided on the gatepost 8.

[0010] Furthermore, a water intake ditch 13 is formed on the outdoor side of the opening E, and water that overflows outside the opening E due to heavy rain is taken in by the water intake ditch 13, and when the taken water reaches an appropriate water level in the water intake ditch 13, the taken water is supplied to the water collection bucket 7 arranged in the second space S2 via a communication passage 14 that connects the water intake ditch 13 and the second space S2. Incidentally, 13a is a grating material that covers the upper edge of the water intake ditch 13.

[0011] The water collecting bucket 7 is normally empty and is located at the upper end portion of the second space S2, and in this state, the water blocking board 2 is stored in the first space S1 with the upper end edge 2a flush with the road surface, and is in an open position with the opening E open. In this open position, if heavy rain or the like occurs and water overflows outside the opening E, the overflowing water is taken in the water intake groove 13 as described above, and is supplied to the water collecting bucket 7 via the communication passage 14, and the water is collected in the water collecting bucket 7. When the weight of the collected water exceeds the weight of the water blocking board 2, the water blocking board 2 moves upward with the water collecting bucket 7 as a cone, closing (sealing) the opening E and automatically waterproofing the water blocking board. The configuration of the water blocking board device 1 is the same as in the conventional case. In the figure, reference numerals 15 and 16 denote a drainage channel constituting a drainage means for draining water accumulated in the second partition chamber S2, and a drainage motor provided in the drainage channel 15.

[0012] Reference numerals 17 and 18 denote the operating path of the operating chain 12, which in this embodiment is the path along which the operating chain 12 moves upward when the water barrier board 2 moves downward, that is, a speed reduction means and a downward movement regulating means arranged on the path hanging down from the second operating sprocket 10, and are arranged vertically so that the speed reduction means 17 is located below the path and the downward movement regulating means 18 is located above the path. The speed reducing means 17 is provided to reduce (brake, regulate) the speed of the vertical movement of the operating chain 12, thereby mitigating the vertical movement speed of the water blocking board 2 and preventing the water blocking board 2 from being displaced vertically between the open and closed positions with a sudden impact, and the speed reducing means 17 is assembled to a case body 19 attached to the gatepost section 8. The first and second oscillating plates 19a, 19b are supported by a swinging support shaft 19c on a base plate 19k fixed to the gatepost section 8 side by a bolt 19l of the case body 19, with a gap therebetween, so that they can swing together, and a speed reducing support shaft 17a constituting the speed reducing means 17 is supported rotatably between the first and second oscillating plates 19a, 19b, and a speed reducing sprocket 17b is supported by the speed reducing support shaft 17a so that it can swing together with the first and second oscillating plates 19a, 19b. On the other hand, the second oscillating plate 19b is provided with a speed reducing portion 17c incorporating a speed reducing mechanism (not shown), and the speed reducing support shaft 17a is supported by the speed reducing portion 17c. The speed reducing mechanism is configured to reduce the speed by applying a braking force to the rotation of the speed reducing sprocket 17b. Incidentally, the speed reducing mechanism may be any of the commonly known speed reducing mechanisms, such as one that applies braking by frictional resistance, one that applies braking by fluid resistance such as oil, etc.

[0013] Furthermore, a cam shaft 19e on which a cam arm 19d is rotatably supported is provided upright on the base plate 19k, and the tip of a locking rod 19f provided to rotate integrally with the cam arm 19 is fixed to a front plate 19g of the case body 19. A cam pin 19h protrudes from the tip of the cam arm 19d, and the cam pin 19h movably passes through a cam groove 19i provided in the second swing plate 19d. A locking mechanism (not shown) is built into the locking rod 19f, and a lock hole 19j is formed on the tip surface portion exposed from the front plate 19g of the locking rod 19f. The locking mechanism is unlocked by inserting a lock (key) 20 into the lock hole 19j. When the lock 21 is rotated while the lock 20 is inserted, the cam arm 19d swings about the swing support shaft 19c as its axis. In response to the swing of the cam arm 19d, the first swing plates 19a, 19b are configured to swing and change shape between an engagement position where the reduction sprocket 17b engages with the operating chain 12 and a release position where the engagement is released. By bringing the reduction sprocket 17b into a state where it is engaged with the operating chain 12, the vertical movement of the operating chain 12 is braked, thereby slowing down the vertical movement of the waterproof board 2. In the figure, reference numeral 21 denotes a stopper member provided at the portion where the reduction sprocket 17c meshes with the differential chain 12 so that the meshing between the reduction sprocket 17b and the differential chain 12 does not come out.

[0014] On the other hand, the downward movement regulating means 18 is incorporated into the same case body 19 as the reduction gear means 17 is incorporated into. However, the case body 19 into which the downward movement regulating means 18 is incorporated differs from the case body 19 into which the reduction gear means 17 is incorporated in that the mounting position of the first oscillating plate 19a is closer to the base plate 19k in order to align the regulating sprocket 18b described below with the installation position of the operating chain 12. Since the other configurations are the same, the same reference symbols are simply used for corresponding parts in the drawings and detailed configurations will not be described.

[0015] The downward movement restricting means 18 has a restricting support shaft 18a rotatably supported by the first and second rocking plates 19a and 19b in a state in which the restricting support shaft 18a penetrates the second rocking plate 19b. Regulating shaft A regulating sprocket 18b that can mesh with the operating chain 12 is rotatably supported between the first and second oscillating plates 19a, 19b of the oscillating plate 18a. Furthermore, the tip portion 18c protruding from the second oscillating plate 19b of the regulating support shaft 18a serves as an inner shaft for constituting a clutch portion 18d incorporating a one-way rotation clutch (one-way clutch) mechanism, and the clutch portion 18d is formed by being fitted into an outer portion 18e attached to the second oscillating plate 19b of the clutch portion 18d. Incidentally, the one-way rotation clutch mechanism is configured and assembled so as to allow the rotation direction of the regulating support shaft 18a in the direction in which the regulating sprocket 18b moves the waterproof plate 2 upward, but to restrict the rotation in the opposite direction in which the waterproof plate 2 moves downward.As the one-way rotation clutch mechanism, a commonly known configuration such as a claw clutch mechanism or a shaft clutch mechanism can be used, and details of these will be omitted.

[0016] Meanwhile, a downward movement allowing mechanism Y configured as a torque limiter for permitting downward movement restriction of the downward movement restricting means 18 is provided between the first and second oscillating plates 19a, 19b on the restricting support shaft 18a. A cylindrical shaft 18f constituting the downward movement allowing mechanism Y is fitted onto the restricting support shaft 18a in a state in which it rotates integrally with the restricting support shaft 18a, and a flange portion 18g is formed on the end edge portion of the cylindrical shaft 18f on the first oscillating plate 19a side, and the restricting sprocket 18b is rotatably supported in a state in which it is slidably supported by the flange portion 18g. A first friction plate 18h, a second friction plate 18i, a resilient mechanism 18j, and an adjustment nut 18k are provided on the cylindrical shaft 18f in the order from the regulating sprocket 18b toward the tip end 18c. The first friction plate 18h is configured to be rotatable relative to the cylindrical shaft 18f and to rotate integrally with the regulating sprocket 18b. The second friction plate 18i is configured to be movable in the axial direction while rotating integrally with the cylindrical shaft 18f and to be in sliding contact with the first friction plate 18h. The resilient mechanism 18j is sandwiched between the second friction plate 18i and the nut 18k and has an elastic force adjusted based on the movement in the axial direction by rotating the nut 18k around the axis. The adjusted elastic force applies a predetermined frictional resistance to the sliding surfaces between the first and second friction plates 18h, 18i.

[0017] When the regulating sprocket 18b is engaged with the operating chain 12 and the waterproof plate 2 is moving upward, that is, when the operating chain 12 arranged on the second space S2 side is moving downward, the rotation of that side of the regulating support shaft 18a in the clutch portion 18d of the downward movement regulating means 18 is performed together with the regulating sprocket 18b and the downward movement allowing mechanism Y, so that the downward movement of the operating chain 12 is performed without hindrance. On the other hand, when the operating chain 12 attempts to move upward, which is the direction in which the water blocking plate 2 moves downward, the rotation of that side of the regulating spindle 18a (the downward movement side of the water blocking plate 2) is restricted by the clutch portion 18d of the downward movement restricting means 18. If the rotational force (rotational load) in this case is smaller than the frictional resistance between the first and second friction plates 18h, 18i of the downward movement allowing mechanism Y, the first and second friction plates 18h, 18i will become one body without sliding against each other, and as a result, the rotation restriction by the clutch portion 18d of the regulating spindle 18a will be directly reflected in the regulating sprocket 18b via the downward movement allowing mechanism Y, and the downward movement of the operating chain 12, i.e., the downward movement of the water blocking plate 2, will be restricted.

[0018] On the other hand, when the downward movement of the regulating spindle 18a on the downward movement side of the waterproof plate 2 is restricted in the clutch portion 18d of the downward movement restricting means 18, if the rotational force (rotational load) is greater than the frictional resistance between the first and second friction plates 18h, 18i of the downward movement allowing mechanism Y, the first friction plate 18h will slide against the second friction plate 18i, and as a result, the rotation restriction in the clutch portion 18d of the regulating spindle 18a is limited to the second friction plate 18i, and the regulating sprocket 18b rotates together with the first friction plate 18h to allow the upward movement of the operating chain 12, i.e., the downward movement of the waterproof plate 2.

[0019] In the present embodiment configured as described, the water blocking board device 1 has a structure in which water overflowing outside the entrance / exit E is collected into the water collecting bucket 7 via the water intake groove 13, causing the water collecting bucket 7 to become heavy. As the heavy water collecting bucket moves downward under its own weight, the water blocking board 2, which is in the open position and is housed in the first partition chamber S1 underground, automatically moves upward to the closed position, thereby closing the opening E and preventing water from entering through the opening E. The waterproof board 2 which has moved upward in this manner is restricted in its downward movement by the downward movement restricting means 18. As a result, even if the water collecting bucket 7 floats or sinks due to water entering the second partition chamber S2 in which the water collecting bucket 7 is arranged, reducing or losing the weight increase effect of the water collecting bucket 7 due to collection of water, the waterproof board 2 will be maintained in the upward movement state, thereby preventing the waterproof board 2 from inadvertently moving downward in the event of overflow, thereby compromising its waterproofness.

[0020] In this way, the waterproof board device 1 exerts a waterproof effect by the waterproof board 2 that moves upward in the event of overflow. However, for example, when the water recedes and the raised waterproof board 2 is lowered to the open position to return to the normal state, if the waterproof board 2 does not return completely to the open position but stops moving downward after moving slightly upward, an excessive downward movement load will be exerted on the waterproof board 2 when a heavy object such as a truck passes over the waterproof board 2, and in this case, the downward movement restriction by the downward movement restriction means 18 will be permitted by the downward movement allowing means Y provided in the downward movement allowing mechanism 18, and the waterproof board 2 will move downward. As a result, the application of excessive load to the actuating chain 12 and other actuating systems can be avoided, and deformation or damage to these actuating systems can be prevented.

[0021] Moreover, in this case, since the downward movement allowing mechanism Y is constituted by a torque limiter, the structure of the downward movement restricting means 18 can be simplified and the installation can be simplified. Furthermore, the downward movement regulating means 18 is configured with a regulating sprocket 18b that meshes with the operating chain 12 to regulate the downward movement of the waterproof board 2, thereby avoiding the problem of the locking claw digging in too deeply as occurred in the conventional case when regulating the downward movement.

[0022] Furthermore, in this device, not only is a downward movement regulating means 18 provided in the operating path of the operating chain 12, but also a deceleration means 17 for slowing down the speed of the up and down movement of the waterproof board 2. By slowing down the up and down movement speed of the waterproof board 2, the deformation operation of the waterproof board 2 can be made smoother by avoiding any impact. However, since the downward movement regulating means 18 provided with the downward movement allowing mechanism Y is arranged on the operating path on the side where the waterproof board 2 moves downward relative to the deceleration means 17, if an excessive load is applied to move the waterproof board 2 downward, the excessive load is prevented from acting directly on the deceleration means 17, and the deceleration means 17 side is protected. [Industrial Applicability]

[0023] INDUSTRIAL APPLICABILITY The present invention can be used as a water blocking board device for preventing water from entering a building through an opening such as an entrance or exit. [Explanation of symbols]

[0024] 1 Waterproof plate device 2 Waterproof board 7. Water collection bucket 12 Operating chain 17 Deceleration means 18. Downward movement control measures 18b regulation sprocket E Opening S Underground space Y Downward movement allowance mechanism

Claims

1. An underground space formed underground at an opening such as an entrance / exit; a waterproof board that moves upward from an open position in which it is stored in the underground space to a closed position in which it closes the opening, thereby preventing the intrusion of water that has overflowed outside the opening; a water collecting bucket that is arranged in the underground space and is connected to the water blocking board via an operating chain while being movable up and down, and that moves down in response to an increase in weight due to the collection of water that has overflowed outside the opening, thereby moving the water blocking board from the open position up to the closed position; In the configuration in which a downward movement restricting means for restricting the downward movement of the water blocking board that has been moved upward to the closed position is provided in the operating path of the operating chain, The downward movement restricting means, a regulating sprocket engageable with the operating chain; A regulation shaft that rotatably supports the regulation sprocket; a one-way rotation clutch portion that restricts the rotation of the restricting support shaft in the downward direction of the waterproof plate but allows the rotation in the upward direction; The device is configured with a torque limiter that, when the rotation of the regulating shaft in the downward movement direction of the water protection plate is regulated by the one-way rotating clutch portion, if the load in the downward movement direction of the water protection plate is smaller than a predetermined load, integrates the regulating sprocket with the regulating shaft to regulate the rotation of the regulating sprocket in the downward movement direction of the water protection plate, while allowing the rotation of only the regulating sprocket in the downward movement direction of the water protection plate when the load in the downward movement direction of the water protection plate is larger than the predetermined load; A water blocking board device characterized in that the regulating sprocket, the one-way rotation clutch portion and the torque limiter which constitute the downward movement regulating means are coaxially assembled to the regulating support shaft.

2. A waterproof board device as described in claim 1, characterized in that a deceleration means for decelerating the speed of the up and down movement of the waterproof board is provided in the operating path of the operating chain, and a downward movement regulating means provided with a torque limiter is arranged on the operating path on the side where the waterproof board moves downward relative to the deceleration means.

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