JP7760309B2 - waterproof board device - Google Patents

Description

The present invention relates to a waterproof board device that is installed at entrances and exits of buildings, etc.

For example, if a road is flooded or experiences heavy rainfall, causing an unexpectedly large amount of water to overflow, there is a risk that water may seep into buildings such as houses, buildings, underground parking lots, and subways through entrances and exits. 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 buildings during floods in order to prevent water from seeping into the building.

The erection mechanism of the water blocking board device described in Patent Document 1 comprises a cylinder member that operates using high-pressure gas as a drive source, and an arm that rotates up and down around its base end and erects the water blocking 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 protruding to the side of the arm is pushed by the tip of the cylinder rod to rotate the shaft, thereby erecting the water blocking board together with the arm.

The water blocking 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 water blocking board, and the water blocking board is raised around one end by extending the cylinder member.

JP 2014-114619 A (page 4, Figure 1) Japanese Patent Application Laid-Open No. 2001-132322 (page 2, Figure 7)

In the water blocking board device described in Patent Document 1, when a large amount of 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 situation, 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 waterproofing effect is lost, and the reliability of the water blocking board device may be compromised. Another problem is that the erection mechanism has a large number of parts, making the configuration complex.

On the other hand, the water blocking board device described in Patent Document 2 has the advantage of being simple in configuration, as 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 backside of the water blocking board by extending linearly, 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, it is necessary to use a large cylinder member to increase the internal pressure, which could result in the erection mechanism becoming larger.

The present invention was developed to address these problems, and aims to provide a highly reliable water blocking board device that uses a simple erection mechanism to reliably maintain the water blocking board in an erected state.

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 the 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,
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, 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.

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.

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.

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.

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.

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. 2 is a cross-sectional view taken along line AA in FIG. 1. This is a cross-sectional view taken along line BB in Figure 1. For ease of explanation, the members on the far side are not shown. FIG. 1 is a plan view of the water blocking board in the upright position. 5 is a cross-sectional view taken along line CC in FIG. 4. This is a cross-sectional view taken along line DD in Figure 4. For ease of explanation, the members on the far side are not shown. FIG. 6 is an enlarged cross-sectional view taken along line EE of FIG. 5. 10A and 10B are schematic side views showing the water blocking board rotated from the lying-down position to partway to the standing position. 10C and 10D 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. 10A and 10B are schematic side views showing the water blocking board rotated from the upright position to partway to the laid-down position. 10C and 10D are schematic side views showing the water blocking board that has rotated halfway to the collapsed position and has further rotated to reach the collapsed position. 10A and 10B are schematic side views showing the 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.

The following describes an embodiment of the water blocking board device according to the present invention.

The waterproof board device according to the embodiment will be described with reference to Figures 1 to 12. In the following description, the outdoor side (upper side of the paper in Figure 1), which is the direction in which the waterproof board stands up, will be referred to as the front, and the indoor side (upper side), which is the direction in which the waterproof board falls down, will be referred to as the rear.

As shown in Figures 1 to 7, the water blocking board device 1 is installed on the indoor floor between a pair of pillars 2, 2 at the entrance to a building. In the event of an emergency such as a flood or heavy rain, the water blocking 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.

The waterproof board device 1 comprises a box-shaped metal case 3 with an open top that serves as a base to be placed on the floor or in a recess formed underground; a waterproof board 4 pivotally attached to the bottom surface of the front end of the case 3; a pair of first erection mechanisms 5, 5 installed on both sides of the bottom of the case 3 and powered by electricity (commercial power); and a second erection mechanism 6 for use in emergencies that is installed centrally between the first erection mechanisms 5, 5 and powered by a non-electrical power source.

The waterproof board 4 is formed from a rectangular metal plate, and multiple reinforcing members 7 are welded vertically and horizontally 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, allowing it to rotate vertically (front-to-back) between a collapsed position (see Figures 1 to 3) and an upright position (see Figures 4 to 6).

When in its collapsed state, the front-to-rear dimension of the waterproof board 4 is made shorter than the front-to-rear dimension of the case 3 by the required amount, and an opening 9 is formed between the rear end of the waterproof 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 also be pivotally attached to the case 3 by a hinge so that it can be opened and closed.

When the waterproof board 4 is rotated to the collapsed 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 top surface of the waterproof board 4 and the floor surface F are aligned almost flush (see Figure 3). Furthermore, when the waterproof board 4 is rotated to the upright 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) on the front surface of the case 3 in a sealed manner, maintaining waterproofing.

Frame members 12, 12, which are slightly shorter than the case 3 and have an inward-facing U-shape in plan view, are fixed to the inner surface of the case 3 near the front, and the bottom 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.

The left and right first erection mechanisms 5, 5 each include an electric cylinder (electric actuator) 51 and an arm 52 that transmits the driving force of the electric cylinder 51 to the water barrier 4. The electric cylinder 51 includes a cylinder member 510 consisting of a hollow cylindrical cylinder 513 and a cylinder rod 511 that can move back and forth relative to the cylinder 513, and a motor 512. The electric cylinder 51 is well known, and houses an axially extending ball screw (not shown) rotated by the motor 512 inside the electric cylinder 51. A nut (not shown) is fixed to the cylinder rod 511 and is threaded onto the ball screw while its co-rotation is restricted. When the ball screw is rotated by the motor 512, the nut is threaded along the ball screw, thereby advancing and retracting 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).

The second erection mechanism 6 includes a hydraulic cylinder 61, a cylinder rod 611 that can move back and forth, and an arm 62 that is 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 consisting of a hollow cylindrical cylinder 613 and a cylinder rod 611 that can move back and forth. 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 pressurized oil to these chambers to move the cylinder rod 611 forward and backward. If the first erection mechanism 5 does not operate normally, the hydraulic cylinder 61 can be operated by a portable manual hydraulic pump or a portable electric hydraulic pump with a built-in battery. 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 pressurized oil to these chambers to move the cylinder rod 611 forward and backward.

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

The arms 52, 62 of the first erection mechanism 5 and the second erection mechanism 6 each comprise 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 left and right that connect one longitudinal end and the other longitudinal end (the front and rear ends when lying down) of the left and right side plate members 521, 621 and the middle portions near the one longitudinal 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 the moving end, 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).

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

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 pivotally attached 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 due to the thrust of the electric cylinder 51 and hydraulic cylinder 61, and the rolling roller 15 at the other end pushes up the waterproof board 4. 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 thrust and stroke to be changed to accommodate different weights and sizes of waterproof boards 4.

On the left and right sides and in the center of the reinforcement material 7 on the backside of the waterproof board 4, a pair of rail members 18, 18 and guard members 19, 19 are provided, one on each side, corresponding to the first erection mechanism 5 and the second erection mechanism 6. Note that all of the rail members 18, 18 and guard members 19, 19 on both the left and right sides and in the center have the same structure and mounting configuration, so only the right-side ones will be described in detail below.

As shown in Figures 5 to 7 (illustrations will be given with the waterproof board in an upright position), a mounting base 20 is welded to the vertical center of the back surface of adjacent vertical reinforcing members 7a, 7a of the reinforcing member 7, and the flange portions 18a of a pair of left and right rail members 18, 18 facing up and down are fixed to the back surface (rear surface) of the central portion of this mounting base 20 with multiple bolts 21. Furthermore, the outward flange portions 19a, 19a of a pair of left and right guard members 19, 19 are fixed to the left and right sides of the mounting base 20, sandwiching the left and right rail members 18, with multiple bolts 21.

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 board is laid down) 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 ending ends (from the top to the bottom in Figures 5 and 6). As shown in Figure 6, a step 18c is formed at the 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 fall into this step 18c when the waterproof board 4 is rotated to the upright position.

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 inward on the left and right from the rear ends of the side wall portions 19b, 19b (see Figure 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 located closer to the hinge mechanism 8 than the rail member 18 (below the waterproof board 4 in the upright position). More specifically, as shown in Figure 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 collapsed position.

Next, the operation and effects of the waterproof board device 1 will be explained with reference to Figures 8 to 12. As shown in Figure 8(a), under normal circumstances, the waterproof board 4 is fully collapsed, with the top surface of the waterproof board 4 and the floor surface F being approximately flush. 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).

When the left or right first erection mechanism 5 is activated, the motor 512 of the electric cylinder 51 operates, and the cylinder rod 511 is screwed forward and protrudes forward. Then, as shown in Figures 8(b) to 9(c), the arm 52 connected to the tip of the cylinder rod 511 gradually rotates upward around one end (front end). As a result, the rolling rollers 15, 15 pivoted to the other end of the arm 52 abut against the guide surfaces 18b of the rail members 18, 18 on the back surface of the waterproof board 4, gradually pushing the waterproof board 4 upward and moving downward relative to it. During this operation, 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. This ensures that the rolling rollers 15 can move reliably along the guide surfaces 18b. Furthermore, the arm 52 and the rolling rollers 15 remain in contact and do not move apart relative to each other, allowing the waterproof board 4 to be erected smoothly and safely.

In addition, when the waterproof board 4 is in the collapsed position, the rolling roller 15 of the second erecting mechanism 6 is not positioned between the guide surface 18b and the regulating portion 19c. Therefore, when the first erecting mechanism 5 erects the waterproof board 4, the regulating portion 19c rotates upward together with the waterproof board 4 without coming into contact with the rolling roller 15, and the arm 62 of the second erecting mechanism 6 is not erected via the rolling roller 15 (see also Figures 4 and 5). Therefore, it does not impose a load on the erecting operation by the first erecting mechanism 5.

As shown in Figure 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 an 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. At this time, 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 absorb the water pressure, so there is no risk of the water blocking board 4 being pushed back in the downward direction and losing its waterproofing effect. Moreover, because the cylinder rod 511 is extended by a screw feed mechanism, it is held in the maximum extended position when the motor 512 stops, further reducing the risk of the water blocking board 4 being pushed back in the downward direction. The condition for stopping the motor 512 may be something other than the stroke of the cylinder rod 511, such as a load acting on the cylinder rod 511 or contact between the water blocking board 4 and the pillar 2.

In addition, because the tip of the cylinder rod 511 is pivotally attached to the left-right center of the arm 52, when the cylinder rod 511 rotates the arm 52 upward, the thrust of the electric cylinder 51 is efficiently and directly transmitted in the direction of raising the arm 52, allowing the waterproof board 4 to be reliably raised in an emergency without causing any problems with the operation of the electric cylinder 51 or arm 52. One longitudinal end of the arm 52 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 of the arm 52 and the other is large, allowing the weight and water pressure of the waterproof board 4 to be reliably supported by the arm 52.

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 borne mainly in the upright direction by the arm 52, with only a small forward/backward component. This allows the simple first erection 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, because the waterproof board 4 is not maintained in an upright position by the tension force of the cylinder rod as in conventional configurations, a compact erection mechanism 5 can be constructed using a small electric cylinder 51.

To return the waterproof board 4 to its lowered position, the control device is operated to reverse the motor 512 of the electric cylinder 51. Then, as shown in the enlarged view of Figure 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. As 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 responsively initiates the lowering of the waterproof board 4. Because 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 downward movement causes the waterproof board 4 to fall backward under its own weight, and the rolling roller 15 separates from the restricting portion 19c and comes into contact with the guide surface 18b.

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 relative to it along the guide surface 18b, 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 pivoted does not interfere with the electric cylinder 51.

The arm 52 is made up of a pair of side plate members 521 facing each other in the left-right direction. When the waterproof board 4 is lowered, at least a portion of the cylinder member 510 of the electric cylinder 51 fits between the pair of side plate members 521. This prevents interference between the arm 52 and the cylinder member 510 when the waterproof board 4 is lowered, allowing the height of the first raising mechanism 5 to be lowered.

As explained above, under normal circumstances, the water barrier 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 the first raising mechanism 5 malfunctions and does not operate normally, the second raising mechanism 6 can be activated to raise the water barrier 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 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 by removing the cover plate 10 at the rear end of the case 3 and through the opening 9.

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 its maximum stroke position, the rolling roller 15 on the other end of the arm 62 pushes the waterproof board 4 up to the upright position, as shown in Figure 12(b), and the entrance/exit 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 of these are omitted.

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

To return the water blocking board 4 to its collapsed position, pressurized oil is supplied to the return oil chamber in the hydraulic cylinder 61, causing the cylinder rod 611 to retract. When the cylinder rod 611 retracts to its minimum stroke position and the water blocking board 4 collapses, the cylinder rod 611 stops in that position, eliminating the need for a stopper mechanism to restrict the maximum downward rotation of the arm 62, and preventing interference with the hydraulic cylinder 61 by the connecting shaft 622 on which the rolling roller 15 is pivoted.

In this way, if the first erection mechanism 5 does not operate normally due to a power outage or other reason, the waterproof board 4 can be erected by the second erection mechanism 6, which is powered by a hydraulic pump other than electricity, so the waterproof board 4 can be reliably erected in situations where waterproofing is required.

The above describes embodiments of the present invention based on the drawings, but the specific configuration is not limited to these embodiments, and additions and modifications that do not deviate from the gist of the present invention are also included in the present invention.

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 therefore be omitted.

Furthermore, while the above embodiment has a pair of first standing mechanisms 5 on the left and right, a single standing mechanism may be installed in the center in the left-right direction.

Furthermore, in the above embodiment, an electric cylinder 51 is used as the actuator for the first erection mechanism 5, but a fluid pressure cylinder operated by hydraulic or pneumatic pressure can also be used.

1 Waterproof board device 2 Pillar 3 Case (base)
4 Waterproof board 5 First erection mechanism 6 Second erection mechanism 7 Reinforcement member 7a Vertical reinforcement member 8 Hinge mechanism 9 Opening 10 Cover plate 11 Stopper rod 12 Frame member 13 Cylinder bracket 13a Elevation piece 14 Pivot 15 Rolling roller (moving end)
16 Arm bracket 16a Upright piece 17 Mounting hole 18 Rail member 18a Outward flange portion 18b Guide surface 18c Step portion 19 Guard member 19a Outward flange portion 19b Side wall portion 19c Restriction portion 20 Mounting base plate 21 Bolt 51 Electric cylinder (actuator)
52 Arm 61 Hydraulic cylinder (fluid pressure cylinder)
62 Arm 510 Cylinder member 511 Cylinder rod 512 Motor 513 Cylinder 521 Side plate member 522 Connecting shaft 610 Cylinder member 611 Cylinder rod 613 Cylinder 621 Side plate member 622 Connecting shaft F Floor surface

Claims (3)

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 the 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 . 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. 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.