Waterproof board device

Abstract

To provide a waterproof plate device capable of reliably maintaining the upright state of a waterproof plate by using a standing mechanism with a simple configuration.SOLUTION: A standing mechanism 5 includes: an actuator 51 having a cylinder member 510 that stretches forward and backward with one end pivoted to a case 3; and an arm 52 rotatably connected to the tip of cylinder member 510. One end of the arm 52 in the longitudinal direction is rotatably attached to the case 3, and at the other end, a rolling roller 15 that moves relatively along a guide surface 18b formed on the back surface of the waterproof plate 4 is provided. At the end of the guide surface 18b, a stepped portion 18c into which the rolling roller 15 enters when the waterproof plate 4 is rotated to the upright position is formed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a water blocking board device to be installed at entrances and exits of buildings and the like. [Background technology]

[0002] For example, when a road is flooded or torrential rain causes a larger-than-expected amount of water to overflow, water may seep into structures through entrances and exits of houses, buildings, underground parking lots, subways, etc. Therefore, as disclosed in Patent Documents 1 and 2, for example, waterproof board devices have been developed that can erect waterproof boards to block entrances and exits of structures in the event of a flood in order to prevent water from seeping into the structures.

[0003] The erection mechanism of the waterproof board device described in Patent Document 1 comprises a cylinder member that operates using high-pressure gas as a power source, and an arm that rotates up and down around its base end and erects the waterproof board by rolling a roller attached to its free end.A shaft facing left and right is fixed to the base end, which is the center of rotation of the arm, and a link fixed to the shaft that protrudes to the side of the arm is pushed by the tip of the cylinder rod to rotate the shaft, thereby erecting the waterproof board together with the arm.

[0004] The waterproof board device described in Patent Document 2 is configured so that the tip of the cylinder rod of a cylinder member, which is driven by hydraulic or pneumatic pressure, is pivotally attached to the back surface of the waterproof board, and the waterproof board is raised around one end by extending the cylinder member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2014-114619 A (page 4, Figure 1) [Patent Document 2] JP 2001-132322 A (page 2, Figure 7) Summary of the Invention [Problem to be solved by the invention]

[0006] In the water blocking board device described in Patent Document 1, when a large water pressure is applied from outdoors to an upright water blocking board, a large reverse thrust is directly applied to the arm in the collapse direction, and a large rotational moment acts around the shaft at the lower end. In this case, a large force is applied in the direction of pushing back the cylinder rod via a link fixed to the shaft of the arm. As a result, the upright state of the water blocking board cannot be maintained, the waterproof effect is lost, and the reliability of the water blocking board device may be impaired. Another problem is that the erection mechanism has a large number of parts, making the configuration complex.

[0007] On the other hand, the water blocking board device described in Patent Document 2 has the advantage of being simple in configuration, since it can raise the water blocking board using an erection mechanism consisting only of a cylinder member. However, because the cylinder rod is configured to directly support the back surface of the water blocking board by pushing it out in a straight line, in order to continuously maintain the water pressure acting on the water blocking board and the resistance to the weight of the water blocking board, a large cylinder member must be used to increase the internal pressure, which could result in the erection mechanism becoming larger.

[0008] The present invention was made in response to these problems, and aims to provide a highly reliable waterproof board device that can reliably maintain the waterproof board in an upright position using a simply configured erection mechanism. [Means for solving the problem]

[0009] In order to solve the above problems, the water blocking board device of the present invention is A waterproof board device comprising: a waterproof board pivotally attached to a base so as to be rotatable up and down between a collapsed position and an erected position; and an erecting mechanism for pushing up the waterproof board to the erected position, the erection mechanism includes a cylinder member that extends in the front-rear direction and has one end pivotally attached to the base, and an arm that is rotatably connected to a tip of the cylinder member, One longitudinal end of the arm is pivotally attached to the base, and the other end has a moving end that moves relatively along a guide surface formed on the back surface of the waterproof board, and a step is formed at the end of the guide surface into which the moving end falls when the waterproof board is rotated to the upright position. And, The guide surface is an inclined surface that gradually protrudes from the starting end toward the end toward the back surface of the waterproof board, and the step portion is formed continuously at the end of the inclined surface. It is characterized by the presence of According to this feature, the extension of the cylinder member causes the arm to rotate, and the moving end moves along the guide surface of the water barrier, causing the water barrier to rise. The moving end drops into a step on the guide surface, allowing the arm to bear the weight of the water barrier and the water pressure acting on the water barrier in the vertical direction. Therefore, a water barrier can be reliably maintained in an upright position against water pressure with a simple erection mechanism, providing a highly reliable water barrier device with excellent waterproofing. Furthermore, since the water barrier is not maintained in an upright position by the tensioning force of the cylinder member as in the conventional configuration, the actuator can be made smaller, resulting in a compact erection mechanism.

[0010] The guide surface is an inclined surface that gradually protrudes toward the back surface of the waterproof board from the starting end toward the terminal end, and is characterized in that the step portion is formed continuously at the terminal end of the inclined surface. According to this feature, by forming a step at the end of the inclined surface protruding toward the back surface, the step can be made deeper, thereby preventing the moving end of the arm from accidentally coming off the step.

[0011] The moving end portion is a rolling roller pivotally supported on a shaft extending in the left-right direction at the other end of the arm, and the step portion is formed by a surface that intersects with the inclined surface at an obtuse angle. According to this feature, by making the step portion a surface with an obtuse angle, when the water blocking board is to be lowered, the rolling rollers smoothly leave the step portion and are guided to the inclined surface, and the lowering operation starts responsively.

[0012] The waterproof board is characterized in that a restricting portion for restricting the moving end portion is provided on the back surface of the waterproof board, spaced away from the guide surface in the back direction and extending along the guide surface. According to this feature, the moving end portion moves between the guide surface and the restricting portion, so the arm and the waterproof board do not move apart relative to each other in the standing direction, allowing the waterproof board to be safely erected. Also, during the lowering operation, the moving end portion of the arm that rotates in the lowering direction pushes the waterproof board in the lowering direction via the restricting portion, so the lowering operation starts responsively.

[0013] The waterproof board is characterized in that a guard member is attached to the back surface thereof, the guard member having side wall portions extending along both the left and right sides of the guide surface and the regulating portions extending inward from the left and right side wall portions. According to this feature, the left and right movement of the moving end portion is restricted by the left and right side wall portions of the guard member, allowing the moving end portion to move reliably along the guide surface and to be reliably guided to the step portion. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a plan view of a water blocking board device according to an embodiment of the present invention when the water blocking board is in a collapsed position. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] 2 is a cross-sectional view taken along the line BB in FIG. 1. For convenience of explanation, the members on the far side are not shown. [Figure 4] FIG. 1 is a plan view of the water blocking board in the upright position. [Figure 5] FIG. 5 is a cross-sectional view taken along line CC in FIG. [Figure 6] 5 is a cross-sectional view taken along line DD in Fig. 4. For convenience of explanation, illustration of the members on the far side is omitted. [Figure 7] FIG. 6 is an enlarged cross-sectional view taken along the line EE in FIG. 5. [Figure 8] 10(a) and 10(b) are schematic side views showing a state in which the water blocking board has been rotated from the lying-down position to partway to the standing position. [Figure 9] 10(c) and 10(d) are schematic side views showing the water blocking board that has rotated halfway to the upright position and then rotated further to reach the upright position. [Figure 10]10(a) and 10(b) are schematic side views showing a state in which the water blocking board has been rotated from the upright position to partway to the laid-down position. [Figure 11] 10(c) and 10(d) are schematic side views showing the water blocking board that has rotated halfway to the lowered position and then rotated further to reach the lowered position. [Figure 12] 10(a) and 10(b) are schematic side views showing a state in which the water blocking board has been rotated from the lying-down position to the standing position by the operation of the second standing mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A water blocking board device according to the present invention will be described below with reference to the following embodiments. [Example]

[0016] A water blocking board device according to an embodiment will be described with reference to Fig. 1 to Fig. 12. In the following description, the outdoor side (upper side of the paper in Fig. 1) in which the water blocking board stands up will be referred to as the front, and the indoor side in which the water blocking board falls down will be referred to as the rear.

[0017] As shown in Figures 1 to 7, the waterproof board device 1 is installed on the indoor floor between a pair of pillars 2, 2 on the left and right sides of the entrance / exit of a building, and in the event of an emergency such as flooding or heavy rain, the waterproof board 4 (described below) is raised and pressed against the rear surfaces of the pillars 2, 2 in a sealed manner to prevent water from entering the building.

[0018] The waterproof board device 1 comprises a box-shaped metal case 3 with an open top that serves as a base to be installed on the floor or in a recess formed in the ground, a waterproof board 4 pivotally attached to the bottom surface of the front end of the case 3, a pair of first raising mechanisms 5, 5 installed on both the left and right sides of the bottom of the case 3 and operated using electricity (commercial power) as a driving source, and a second raising mechanism 6 for use in emergency situations that is installed in the center between the first raising mechanisms 5, 5 and operates using a driving source other than electricity.

[0019] The waterproof board 4 is formed from a rectangular metal plate, and multiple reinforcing members 7 are fixed lengthwise and widthwise by welding to its back surface (the rear surface when in the upright position). One long side of the waterproof board 4 is pivotally attached to the front bottom surface of the case 3 by multiple (three in this embodiment) hinge mechanisms 8 on the left and right sides so that it can rotate up and down (front and back), and can rotate up and down between a laid-down position (see Figures 1 to 3) and an upright position (see Figures 4 to 6).

[0020] The front-to-rear dimension of the water blocking board 4 in the collapsed state is formed to be shorter than the front-to-rear dimension of the case 3 by the required distance, and an opening 9 is formed between the rear end of the water blocking board 4 and the rear wall of the case 3, allowing access to the internal space of the case 3 for use in inspections, etc. The opening 9 is always closed by a removable cover plate 10. The cover plate 10 may be pivotally attached to the case 3 by a hinge so that it can be opened and closed.

[0021] When the waterproof board 4 is rotated to the lying position, the underside of its rear end abuts against the upper ends of multiple stopper rods 11 on the left and right sides that are erected on the bottom surface near the rear of the case 3, so that the upper surface of the waterproof board 4 and the floor surface F are aligned to be substantially flush with each other (see Figure 3). Also, when the waterproof board 4 is rotated to the standing position, the surface (front surface) of the waterproof board 4 is pressed against the rear surfaces of the left and right pillars 2, 2 in a sealed manner via sealing members (not shown), and the lower edge is pressed against a sealing member (not shown) provided on the front surface of the case 3 in a sealed manner, so that waterproofing is maintained.

[0022] Frame members 12, 12 that are slightly shorter than the case 3 and have an inward U-shape in plan view are fixed to the inner surface of the case 3 near the front, and the bottom surface of the case 3 below the frame members 12 is open. By pouring ready-mixed concrete into the frame members 12, 12, the case 3 can be fixed to the foundation of the floor surface F.

[0023] Each of the left and right first raising mechanisms 5, 5 includes an electric cylinder (electric actuator) 51 as an actuator and an arm 52 that transmits the driving force of the electric cylinder 51 to the water blocking board 4. The electric cylinder 51 includes a cylinder member 510 consisting of a hollow cylindrical cylinder 513 and a cylinder rod 511 that can advance and retreat in the front-rear direction relative to the cylinder 513, and a motor 512. The electric cylinder 51 is a known type, and houses a ball screw (not shown) extending in the axial direction that is rotated by the motor 512 inside the electric cylinder 51. A nut (not shown) is fixed to the cylinder rod 511 and is screwed onto the ball screw in a state where co-rotation with the ball screw is restricted. When the ball screw is rotated by the motor 512, the nut is screwed along the ball screw, thereby advancing and retreating the cylinder rod 511. When the electric cylinders 51 are used, the left and right electric cylinders 51 can be operated synchronously by a control device (not shown).

[0024] The second erection mechanism 6 includes a hydraulic cylinder 61, a cylinder rod 611 that can advance and retreat in the front-rear direction, and an arm 62 that can be raised and lowered by the cylinder rod 611 and has the same structure as the arm 52 of the first erection mechanism 5. The hydraulic cylinder 61 includes a cylinder member 610 that includes a hollow cylindrical cylinder 613 and a cylinder rod 611 that can advance and retreat in the front-rear direction. The hydraulic cylinder 61 is a known double-acting hydraulic cylinder that has an extension oil chamber and a return oil chamber inside the cylinder member 610, and selectively supplies pressure oil to these chambers to move the cylinder rod 611 forward and backward. The hydraulic cylinder 61 can be operated by a portable manual hydraulic pump or a portable electric hydraulic pump with a built-in battery if the first erection mechanism 5 does not operate normally. The hydraulic cylinder 61 is a known double-acting hydraulic cylinder that has an extension oil chamber and a return oil chamber inside, and selectively supplies pressure oil to these chambers to move the cylinder rod 611 forward and backward.

[0025] Cylinder brackets 13 are bolted to the left and right sides of the rear side of the bottom of the case 3 and to the center slightly forward of those sides, and the base ends (rear ends) of the electric cylinders 51 of the first standing mechanisms 5 and 5 and the hydraulic cylinders 61 of the second standing mechanisms 6 are pivotally attached to the left and right standing pieces 13a, 13a of each cylinder bracket 13 so that they can rotate up and down by pivots 14 facing left and right.

[0026] The arms 52, 62 of the first and second erection mechanisms 5, 6 each include a pair of left and right side plate members 521, 521, 621, 621 facing each other at a predetermined distance from each other, and connecting shafts 522, 622 facing in the left-right direction that connect one end and the other end (the front and rear ends when the arm is laid down) of the left and right side plate members 521, 621 in the longitudinal direction and between the middle portions near the one end. The pair of side plate members 521, 621 are unitized by the connecting shafts 522, 622. The connecting shafts 522, 622 at one end and the other end of each arm 52, 62 protrude outward from the side plate members 521, 621, and rolling rollers 15, 15, which serve as moving ends, are pivotally supported on the left and right protrusions of the connecting shafts 522, 622 at the other end. The rolling rollers 15, 15 move relatively along the back surface of the waterproof board 4 (details will be described later).

[0027] Arm brackets 16 are bolted to the left and right sides and the center of the upper surface near the front of the bottom of the case 3, and the left and right protrusions of connecting shafts 522, 622 on one end sides of the arm 52 of the first erection mechanism 5 and the arm 62 of the second erection mechanism 6 are pivotally supported on the left and right standing pieces 16a, 16a of each arm bracket 16. This allows each arm 52, 62 to rotate up and down around one end (front end) as the center.

[0028] The tip of the cylinder rod 511 of the first erection mechanism 5 and the tip of the cylinder rod 611 of the second erection mechanism 6 are rotatably mounted to the left-right center of the connecting shafts 522, 622 at the middle of each arm 52, 62, respectively, so that the cylinder rods 511, 611 and the left-right center of the arms 52, 62 are aligned in a straight line in a plan view. Each arm 52, 62 rotates upward around one end by the thrust of the electric cylinder 51 and the hydraulic cylinder 61, and the waterproof board 4 is pushed up by the rolling roller 15 at the other end. As shown in Figures 3 and 6, the side plate members 521, 621 of the arms 52, 62 have multiple mounting holes 17 to which the connecting shafts 522, 622 of the cylinder rods 511, 611 are attached. This allows the pivotal mounting positions of the cylinder rods of actuators with different thrusts and strokes to be changed to accommodate different weights and sizes of waterproof boards 4.

[0029] A pair of rail members 18, 18 and guard members 19, 19 are provided on each of the left and right sides and the center of the reinforcement material 7 on the back surface of the waterproof board 4, corresponding to the first erection mechanism 5 and the second erection mechanism 6. Since all of the rail members 18, 18 and guard members 19, 19 on both the left and right sides and the center have the same structure and mounting form, only the right side will be described in detail below.

[0030] 5 to 7 (the description will be given with the water-blocking board in an upright position), a mounting base 20 is fixed by welding to the vertical center of the rear surface of adjacent vertical reinforcing members 7a, 7a of the reinforcing member 7, and flange portions 18a of a pair of left and right rail members 18, 18 facing in the vertical direction are fixed to the rear surface (rear surface) of the central portion of this mounting base 20 by a plurality of bolts 21. In addition, outward flange portions 19a, 19a of a pair of left and right guard members 19, 19 are fixed by a plurality of bolts 21 to both left and right sides of the mounting base 20 that sandwich the left and right rail members 18.

[0031] The rail members 18, 18 protrude rearward (toward the back surface of the waterproof board 4), and their rear end surfaces (which are the lower surfaces when the waterproof board 4 is in a laid-down position) serve as guide surfaces 18b, 18b that guide the rolling rollers 15, 15 of the arm 52. The guide surfaces 18b are inclined surfaces that gradually protrude toward the back surface of the waterproof board 4 from their starting ends to their terminal ends (from the upper end to the lower end in Figures 5 and 6). As shown in Figure 6, a step 18c is formed at the terminal ends of the left and right guide surfaces (inclined surfaces) 18b, 18b, by a surface that intersects with the guide surfaces 18b at an obtuse angle. As shown in the enlarged view of Figure 9(d), the rolling rollers 15, 15 are designed to fall into this step 18c when the waterproof board 4 is rotated to the upright position.

[0032] The guard members 19, 19 extend along the guide surfaces 18b, 18b of the rail members 18, 18, and have side wall portions 19b, 19b that protrude rearward, and restricting portions 19c, 19c that extend inwardly to the left and right from the rear ends of the side wall portions 19b, 19b (see FIG. 7). The opposing surfaces of the restricting portions 19c, 19c and the guide surfaces 18b, 18b of the rail members 18, 18 are spaced apart to allow the rolling rollers 15, 15 to pass through. The vertical dimension of the guard member 19 is shorter than that of the rail member 18, and the restricting portion 19c is positioned closer to the hinge mechanism 8 than the rail member 18 (below the water blocking board 4 in the upright state). More specifically, as shown in FIG. 5, the starting end of the restricting portion 19c is positioned lower than the starting end of the rail member 18. This is to prevent the rolling roller 15 from being positioned between the guide surface 18b and the restricting portion 19c when the water blocking board 4 is in the laid-down position.

[0033] Next, the operation and effects of the water blocking board device 1 will be described with reference to Figures 8 to 12. As shown in Figure 8(a), under normal circumstances, the water blocking board 4 is in a completely collapsed state, and the upper surface of the water blocking board 4 and the floor surface F are substantially flush with each other. In the event of an emergency such as a flood or heavy rain, when it becomes necessary to prevent water from entering the building, the left and right first raising mechanisms 5 are activated simultaneously by operating a control device (not shown).

[0034] When the left and right first raising mechanisms 5 are operated, the motors 512 of the electric cylinders 51 are activated, and the cylinder rods 511 are screwed and protrude forward. Then, as shown in FIGS. 8(b) to 9(c), the arms 52 connected to the ends of the cylinder rods 511 gradually rotate upward around one end (front end). As a result, the rolling rollers 15, 15 pivoted to the other ends of the arms 52 come into contact with the guide surfaces 18b of the rail members 18, 18 on the back surface of the waterproof board 4, gradually pushing up and relatively moving downward the waterproof board 4. At this time, the rolling rollers 15 move between the restricting portions 19c and the guide surfaces 18b while their movement in the left-right direction is restricted by the side wall portions 19b of the guard members 19. Therefore, the rolling rollers 15 can reliably move along the guide surfaces 18b. Furthermore, the arms 52 and the rolling rollers 15 remain in contact with each other and do not move apart, allowing the waterproof board 4 to be raised smoothly and safely.

[0035] Furthermore, when the water blocking board 4 is in the collapsed position, the rolling roller 15 of the second raising mechanism 6 is not positioned between the guide surface 18b and the regulating portion 19c, so that when the first raising mechanism 5 raises the water blocking board 4, the regulating portion 19c rotates upward together with the water blocking board 4 without coming into contact with the rolling roller 15, and the arm 62 of the second raising mechanism 6 is not raised via the rolling roller 15 (see also Figures 4 and 5). Therefore, it does not become a load on the raising operation by the first raising mechanism 5.

[0036] As shown in FIG. 9(d), when the cylinder rod 511 extends to its predetermined maximum stroke, the motor 512 stops, and the water blocking board 4 rotates to the upright position where it abuts the left and right pillars 2 and stops. This allows the water blocking board 4 to block the entrance and exit in an emergency, preventing water from entering the building. Even if the water blocking board 4 is heavy, the pair of left and right first raising mechanisms 5 work together to raise the water blocking board 4 in a balanced manner. Furthermore, even if water pressure is applied to the water blocking board 4 in the upright position, the left and right first raising mechanisms 5 withstand the water pressure, so there is no risk of the water blocking board 4 being pushed back in the collapsed direction and losing its waterproofing effect. Furthermore, because the cylinder rod 511 extends using a screw feed mechanism, it is held in the maximum extension position when the motor 512 stops, further reducing the risk of the water blocking board 4 being pushed back in the collapsed direction. The condition for stopping the motor 512 may be other than the stroke of the cylinder rod 511 , for example, it may be due to a load acting on the cylinder rod 511 or the contact between the water blocking board 4 and the pillar 2 .

[0037] Furthermore, because the tip of the cylinder rod 511 is pivotally attached to the left-right center of the arm 52, when the arm 52 is rotated upward by the cylinder rod 511, the thrust of the electric cylinder 51 is transmitted efficiently and directly in the direction in which the arm 52 rises, and in an emergency the water blocking board 4 can be reliably raised without causing any malfunction in the operation of the electric cylinder 51 or the arm 52. One end of the arm 52 in the length direction is pivotally attached to the case 3, the rolling roller 15 is pivotally supported at the other end, and the tip of the cylinder rod 511 is pivotally attached to the middle portion, so the distance between one end and the other of the arm 52 is large and therefore the weight and water pressure of the water blocking board 4 can be reliably supported by the arm 52.

[0038] As shown in the enlarged view of Figure 9(d), when the waterproof board 4 rotates to the upright position, the rolling roller 15 drops into the step 18c of the rail member 18. As a result, the weight of the waterproof board 4 and the force due to water pressure acting on the waterproof board 4 can be supported mainly in the upright direction and only a small component in the front-to-back direction of the arm 52. This allows the simple first raising mechanism 5 to reliably maintain the waterproof board 4 in an upright position against water pressure. As a result, the force acting on the electric cylinder 51 from the arm 52 is reduced, and a highly reliable waterproof board device 1 with excellent waterproofing performance can be provided. Moreover, because the step 18c is formed at the end of the guide surface 18b, which has a large protruding dimension, the step 18c can be made deep, preventing the rolling roller 15 from accidentally coming off the step 18c. Furthermore, since the waterproof board 4 is not maintained in an upright position by the tension force of a cylinder rod as in conventional configurations, a compact raising mechanism 5 can be constructed using a small electric cylinder 51.

[0039] To return the waterproof board 4 to its lowered position, the control device is operated to reverse the rotation of the motor 512 of the electric cylinder 51. Then, as shown in the enlarged view of FIG. 10(b), the rolling roller 15, which had been positioned at the stepped portion 18c, moves upward and disengages from the stepped portion 18c due to the retraction of the cylinder rod 511 and the rearward rotation of the arm 52 immediately after the motor 512 is activated. When the arm 52 further rotates rearward, the rolling roller 15 abuts against the restricting portion 19c of the guard member 19, and the waterproof board 4 is pushed in the lowering direction via the restricting portion 19c. This initiates the lowering of the waterproof board 4 responsively. Since the stepped portion 18c intersects with the guide surface 18b at an obtuse angle, the rolling roller 15 smoothly disengages from the stepped portion 18c when the waterproof board 4 is lowered. This falling action causes the water blocking board 4 to fall backward under its own weight, and the rolling rollers 15 move away from the restricting portions 19c and come into contact with the guide surfaces 18b.

[0040] When the cylinder rod 511 is further retracted from the state shown in Figure 10(b), the arm 52 rotates further downward as shown in Figure 11(c), and the rolling roller 15 moves upward along the guide surface 18b relative to the arm 52, gradually rotating the water blocking board 4 in the collapsed direction. When the cylinder rod 511 is retracted to the minimum stroke position, the motor 512 automatically stops, and the water blocking board 4 rotates to the collapsed position and stops as shown in Figure 11(d). At this time, because the control device stops the cylinder rod 511 at the minimum stroke position, there is no need for a stopper mechanism or the like to restrict the maximum downward rotation of the arm 52, and the connecting shaft 522 on which the rolling roller 15 is pivotally supported and the like do not interfere with the electric cylinder 51.

[0041] The arm 52 is made up of a pair of side plate members 521 facing each other in the left-right direction, and when the waterproof board 4 is lowered, at least a part of the cylinder member 510 of the electric cylinder 51 fits between the pair of side plate members 521. Therefore, when the waterproof board 4 is lowered, there is no interference between the arm 52 and the cylinder member 510, and the height of the first standing mechanism 5 can be lowered.

[0042] As explained above, under normal circumstances, the water blocking board 4 can be raised by the first raising mechanism 5, which operates using electricity as a power source. However, in the unlikely event that the power supply is cut off or a malfunction occurs in the first raising mechanism 5 and it does not operate normally, the second raising mechanism 6 can be operated to raise the water blocking board 4, as shown in FIG. 12 . In this case, the hydraulic hose of a portable manual hydraulic pump or a portable electric hydraulic pump with a built-in battery (neither of which are shown) is connected to the hydraulic cylinder 61 to operate the second raising mechanism 6. The hydraulic hose can be connected to the hydraulic cylinder 61 through the opening 9 by removing the cover plate 10 at the rear end of the case 3.

[0043] When pressurized oil is supplied to the oil chamber on the protruding side of the hydraulic cylinder 61 in the collapsed state shown in Figure 12(a), the cylinder rod 611 protrudes forward, and the arm 62 rotates upward around one end. When the cylinder rod 611 protrudes forward to the maximum stroke position, the water blocking board 4 is pushed up to the upright position by the rolling roller 15 at the other end of the arm 62, as shown in Figure 12(b), and the entrance is blocked. Note that the action of the step portion 18c of the rail member 18 and the action of the restricting portion 19c of the guard member 19 are the same as those of the first erection mechanism 5, and the effects of the second erection mechanism 6 are also substantially the same as those of the first erection mechanism 5, so detailed explanations thereof will be omitted.

[0044] When the waterproof board 4 is in the collapsed position, the rolling roller 15 of the first erecting mechanism 5 is not positioned between the guide surface 18b and the regulating portion 19c, so even when the second erecting mechanism 6 is activated, the arm 52 of the first erecting mechanism 5 is not erected via the rolling roller 15, and does not become a load on the erecting operation by the second erecting mechanism 6.

[0045] To return the water blocking board 4 to its lowered position, pressurized oil is supplied to the return oil chamber in the hydraulic cylinder 61 to retract the cylinder rod 611. When the cylinder rod 611 retracts to the minimum stroke position and the water blocking board 4 is lowered, the cylinder rod 611 stops at that position, so there is no need for a stopper mechanism or the like to restrict the maximum downward rotation amount of the arm 62, and the connecting shaft 622 on which the rolling roller 15 is pivoted and the like do not interfere with the hydraulic cylinder 61.

[0046] In this way, if the first raising mechanism 5 does not operate normally due to a power supply outage or the like, the waterproof board 4 can be raised by the second raising mechanism 6, which is operated by a hydraulic pump other than electricity, so that the waterproof board 4 can be reliably raised in situations where waterproofing is required.

[0047] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and additions and modifications within the scope of the present invention are also included in the present invention.

[0048] For example, in the above embodiment, a pair of left and right first and second standing mechanisms 5 and 6 are provided, but the second standing mechanism 6 is not directly related to the present invention and may be omitted.

[0049] Furthermore, in the above embodiment, a pair of first standing mechanisms 5 are provided on the left and right sides, but a single standing mechanism may be provided in the center in the left-right direction.

[0050] Furthermore, in the above embodiment, the electric cylinder 51 is used as the actuator of the first erection mechanism 5, but a fluid pressure cylinder that is operated by hydraulic pressure or air pressure can also be used. [Explanation of symbols]

[0051] 1 Waterproof plate device 2 pillars 3 Case (base) 4 Waterproof board 5 1st standing mechanism 6 Second standing mechanism 7 Reinforcement 7a Longitudinal reinforcement 8 Hinge mechanism 9 aperture 10 Cover Plate 11 Stopper rod 12 Frame members 13 Cylinder bracket 13a Standing piece 14 Axis 15 Rolling roller (moving end) 16 Arm bracket 16a Standing piece 17 Mounting hole 18 Rail components 18a Outward flange 18b Guide surface 18c stepped section 19 Guard material 19a Outward flange 19b Side wall part 19c Regulatory Department 20 Mounting board 21 volts 51 Electric cylinder (actuator) 52 Arm 61 Hydraulic cylinder (fluid pressure cylinder) 62 Arm 510 Cylinder parts 511 Cylinder rod 512 motor 513 Cylinder 521 Side plate member 522 Connecting shaft 610 Cylinder parts 611 Cylinder rod 613 Cylinder 621 Side plate member 622 Connecting shaft F Floor

Claims

1. A waterproof board device comprising: a waterproof board pivotally attached to a base so as to be rotatable up and down between a collapsed position and an erected position; and an erecting mechanism for pushing up the waterproof board to the erected position, the erection mechanism includes a cylinder member that extends in the front-rear direction and has one end pivotally attached to the base, and an arm that is rotatably connected to a tip of the cylinder member, One longitudinal end of the arm is pivotally attached to the base so as to be rotatable, and the other end has a moving end portion that moves relatively along a guide surface formed on the back surface of the waterproof board, and a step portion is formed at the end of the guide surface into which the moving end portion drops when the waterproof board is rotated to the upright position, A waterproof board device characterized in that the guide surface is an inclined surface that gradually protrudes toward the back surface of the waterproof board from the starting end toward the terminal end, and the step portion is formed continuously at the terminal end of the inclined surface.

2. The waterproof board device described in claim 1, characterized in that the moving end is a rolling roller pivoted on an axis extending in the left-right direction at the other end of the arm, and the step portion is formed by a surface that intersects with the inclined surface at an obtuse angle.

3. 3. The water blocking board device according to claim 1, wherein a restricting portion for restricting the moving end portion is provided on the back surface of the water blocking board, the restricting portion being spaced away from the back surface of the guide surface and extending along the guide surface.

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