JP7829449B2 - waterproof board device - Google Patents

Description

Applicable to Article 30, Paragraph 2 of the Patent Law: Okamura Corporation has published information about the "waterproof plate device" invented by Naoya Adachi, Shinya Kato, and Yuki Hosokawa in its internal public relations and marketing newsletter (No. 2022-12W).

This invention relates to a waterproof panel device installed at entrances and exits of buildings.

For example, if a large amount of water, exceeding expectations, overflows onto roads due to flooding or torrential rain, there is a risk of water entering buildings such as houses, office buildings, underground parking lots, and subways through their entrances and exits. Therefore, to prevent water from entering buildings, waterproof panel devices (waterproof door devices) have been developed that can be raised during floods to block the entrances and exits of buildings (see, for example, Patent Document 1).

The waterproof plate erection mechanism described in Patent Document 1 comprises a cylinder that operates using high-pressure gas as a driving source, and an arm that rotates vertically around one end and erects the waterproof plate by the rolling of a roller provided at the other end. When the water sensing unit of the gas supply unit detects rising water levels, high-pressure gas from the gas cylinder is supplied to the cylinder, automatically erecting the waterproof plate together with the arm.

Japanese Patent Publication No. 2014-114619 (page 4, Figure 1)

In waterproof panel devices like the one described in Patent Document 1, if a malfunction occurs in the uprighting mechanism due to, for example, deterioration over time, there is a risk that the waterproof panel may not be able to be reliably raised in situations where waterproofing is required. Therefore, periodic maintenance and inspection of the uprighting mechanism are performed. Since maintenance and inspection of the uprighting mechanism requires actually driving the mechanism and operating the waterproof panel, safety considerations necessitate restricting access to the area around the waterproof panel device and deploying workers, making the maintenance and inspection of the uprighting mechanism cumbersome.

This invention addresses these problems and aims to provide a waterproof plate device that allows for easy maintenance and inspection.

To solve the above problems, the waterproof plate device of the present invention is
A waterproof plate device comprising a waterproof plate pivotally attached to a base so as to be able to rotate vertically between a reclined position and an upright position, and an upright mechanism that pushes the waterproof plate up to the upright position,
The aforementioned standing mechanism is equipped with an electric actuator.
The system is characterized by having monitoring means for monitoring the operation of the actuator while the waterproof plate is not moving from the folded position.
This feature allows for easy maintenance and inspection of the waterproofing panel by operating only the electric actuator without moving the waterproofing panel itself, collecting information on the actuator and electrical components, and monitoring whether they are functioning correctly. This makes it possible to determine whether maintenance on the actuator and electrical components is necessary, thus simplifying the maintenance and inspection of the waterproofing panel device.

A key feature is that there is some play in the connection between the standing mechanism and the base.
This feature allows the actuator to be driven with a simple structure without having to operate the waterproof plate.

A key feature is that there is some play in the connection between the erecting mechanism and the waterproof plate.
This feature allows the actuator to be driven with a simple structure without operating the waterproof plate. Furthermore, it allows for stable operation of the lifting mechanism.

The aforementioned lifting mechanism is provided with a link mechanism that receives driving force from the actuator and transmits force to the waterproof plate.
A key feature is that there is some play in the connection between the actuator and the link mechanism.
This feature allows the actuator to be driven without any load being placed on the waterproof plate.

The system is characterized by monitoring the operation of the actuator and then returning the actuator to its initial position.
This feature allows for continuous monitoring of the actuator's operation.

The actuator is characterized by having an external output function that outputs operational information.
This feature allows for monitoring of actuator operation with a simple structure.

This is a plan view of the waterproofing plate device according to an embodiment of the present invention when the waterproofing plate is in the fallen position. This is a cross-sectional view taken along line A-A in Figure 1. This is a cross-sectional view along line B-B in Figure 1. For the sake of explanation, the rear component is not shown. This is a plan view of the waterproof panel when it is in the upright position. This is a cross-sectional view taken along line C-C in Figure 4. This is a cross-sectional view taken along line D-D in Figure 4. For the sake of explanation, the rear component is not shown. This is an enlarged cross-sectional view of the line E-E in Figure 5. (a) is a perspective view showing the bracket, (b) is a front view, (c) is a side view, and (d) is a bottom view. This is a side cross-sectional view showing the initial position of the electric cylinder when the waterproofing plate is in a collapsed position. This is a schematic diagram showing the entire waterproof panel device. This is a side cross-sectional view showing the state after the inspection operation of the electric cylinder has been performed. (a) is a diagram showing the main screen of the display unit, and (b) is a diagram showing the inspection screen of the display unit. (a) is a diagram showing the state in which a message indicating the completion of the inspection operation of the electric cylinder is displayed, and (b) is a diagram showing the state in which a message indicating an abnormality in the electric cylinder is displayed.

The embodiments for implementing the waterproof plate device according to the present invention will be described below based on examples.

The waterproof panel device according to the embodiment will be described with reference to Figures 1 to 13. In the following description, the outdoor side (upper part of the paper in Figure 1), which is the upright direction of the waterproof panel, will be referred to as the front, and the indoor side, which is the downside direction, will be referred to as the rear.

As shown in Figures 1 to 7, the waterproof panel device 1 is installed on the indoor floor surface between a pair of columns 2, 2 at the entrance of the building. In emergencies such as floods or torrential rain, the waterproof panel 4 (described later) is raised and pressed tightly against the rear surface of the columns 2, 2, thereby preventing water from entering the building.

The waterproof plate device 1 comprises a box-shaped metal case 3 with an open top surface, which serves as a base installed in a recess formed in the floor or ground; a waterproof plate 4 pivotally attached to the bottom surface of the front end of the case 3; standing mechanisms 5, 5, 5 installed spaced apart on the left and right sides of the bottom surface of the case 3, which operate using electricity (commercial power supply) as a driving source; and a control device C (see Figure 10) that controls the standing mechanisms 5, 5, 5 from the outside.

In this embodiment, a configuration in which an electric-powered uprighting mechanism 5 is provided is illustrated. However, in addition to the uprighting mechanism 5, an uprighting mechanism operated by a power source other than electricity (e.g., hydraulics) may also be provided.

The waterproof plate 4 is formed from a rectangular metal plate, and multiple reinforcing members 7 are welded to its back surface (rear surface in the upright position) in a vertical and horizontal direction. One of the long sides of the waterproof plate 4 is pivotally attached to the front bottom surface of the case 3 by multiple hinge mechanisms 8 (three in this embodiment), allowing it to rotate vertically (front-to-back direction). It can rotate vertically between a folded position (see Figures 1-3) and an upright position (see Figures 4-6).

In the collapsed state, the front-to-rear dimensions of the waterproof plate 4 are formed to be shorter than the front-to-rear dimensions of the case 3 by the required amount. An opening 9 is formed between the rear end of the waterproof plate 4 and the rear wall of the case 3, allowing access to the internal space of the case 3 for inspection, etc. The opening 9 is normally 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.

When the waterproof plate 4 rotates to the lowered position, the underside of its rear end contacts the upper ends of the multiple stopper rods 11 erected on the bottom surface near the rear of the case 3, causing the top surface of the waterproof plate 4 and the floor surface F to align almost flush (see Figure 3). Furthermore, when the waterproof plate 4 rotates to the upright position, the surface (front) of the waterproof plate 4 is pressed against the rear surfaces of the left and right columns 2, 2 in a sealed manner via sealing members (not shown), and its lower edge is pressed against a sealing member (not shown) provided on the front of the case 3, thus maintaining waterproofness.

On the inner surface of the front of case 3, two U-shaped frame members 12, 12, slightly lower in height than case 3 and facing inward in a plan view, are fixed. The bottom surface of case 3 below the frame members 12 is open. By pouring ready-mix concrete into the frame members 12, 12, case 3 can be fixed to the foundation of the floor surface F.

Each of the standing mechanisms 5, 5, and 5 comprises an electric cylinder (electric actuator) 51, which is an actuator, and an arm 52, which is a link mechanism that transmits the driving force of the electric cylinder 51 to the waterproof plate 4.

The electric cylinder 51 comprises 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 a known design, and inside it houses an axially extending ball screw (not shown) that is rotated by the motor 512. A nut (not shown) is fixed to the cylinder rod 511, which is screwed onto the ball screw in a way that restricts its rotation. When the ball screw rotates due to the motor 512, the nut is screwed along the ball screw, causing the cylinder rod 511 to move back and forth. Using the electric cylinder 51, multiple electric cylinders 51 can be operated synchronously by the control device C.

The electric cylinder 51 in this embodiment has an external output function that detects its own operating status and outputs it to the control device C. Specifically, the electric cylinder 51 has an encoder (not shown) that can obtain position information of the cylinder rod 511 in the forward and backward direction, and outputs this position information to the control device C. Note that the electric cylinder 51 is not limited to an encoder; it may also be equipped with a strain sensor, ammeter, or voltmeter, and the data obtained from these may be output to the control device C.

Cylinder brackets 13 are bolted to the rear side of the bottom surface of case 3. The base ends (rear ends) of the electric cylinders 51 of the standing mechanisms 5, 5, 5 are pivotally attached to the left and right upright pieces 13a, 13a of each cylinder bracket 13 by pivots 14 that face left and right, allowing them to rotate vertically.

The arm 52 of the standing mechanism 5 comprises a pair of left and right side plate members 521, 521 facing each other at a predetermined distance apart to the left and right, and a connecting shaft 522 oriented in the left-right direction that connects one end and the other end (front end and rear end when lowered) of the left and right side plate members 521 in the longitudinal direction, and the intermediate parts near one end. The pair of side plate members 521 are unitized so as to form a single unit by the connecting shaft 522. The connecting shaft 522 at one end and the other end of each arm 52 protrudes outward from the side plate member 521, and rolling rollers 15, 15, which are the movable ends, are pivotally supported on the left and right protruding parts of the connecting shaft 522 at the other end. The rolling rollers 15, 15 move relative to each other along the back surface of the waterproof plate 4 (details will be described later).

An arm bracket 16 is bolted to the front of the bottom surface of case 3. The left and right upright pieces 16a, 16a of each arm bracket 16 are pivotally supported by the left and right protrusions of the connecting shaft 522 at one end of the arm 52 of the uprighting mechanism 5. This allows each arm 52 to rotate up and down around one end (front end).

The tip of the cylinder rod 511 of the erection mechanism 5 is pivotally attached to the center of the connecting shaft 522 in the left-right direction of the intermediate part of each arm 52 via a bracket 30, which will be described later. Each arm 52 rotates upward around one end due to the thrust of the electric cylinder 51, and the rolling roller 15 at the other end pushes up the waterproof plate 4. As shown in Figures 3 and 6, the side plate member 521 of the arm 52 is provided with multiple mounting holes 17 to which the connecting shaft 522 of the cylinder rod 511 is attached, allowing the pivot position of the cylinder rod of actuators with different thrust and stroke to be changed to accommodate differences in the weight and size of the waterproof plate 4.

On the reinforcing material 7 on the back of the waterproof plate 4, pairs of rail members 18, 18 and guard members 19, 19 are provided on both the left and right sides and in the center, corresponding to each of the upright mechanisms 5. Since all the rail members 18, 18 and guard members 19, 19 on both sides and in the center have the same structure and mounting configuration, only the right-side rail member will be described in detail below.

As shown in Figures 5 to 7 (explained with the waterproof plate in an upright position), a mounting base plate 20 is welded to the vertical center of the back surfaces of adjacent vertical reinforcing members 7a, 7a of the reinforcing member 7. The flange portions 18a of a pair of vertically oriented left and right rail members 18, 18 are fixed to the back surface (rear surface) of the central portion of this mounting base plate 20 by multiple bolts 21. Furthermore, the outward-facing flange portions 19a, 19a of a pair of left and right guard members 19, 19 are fixed to both the left and right sides of the mounting base plate 20, sandwiching the left and right rail members 18, by multiple bolts 21.

The rail members 18, 18 protrude rearward (towards the back surface of the waterproof plate 4), and their rear end surfaces (which are the bottom surfaces in the tilted 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 towards the back surface of the waterproof plate 4 from the starting end to the ending end (from the upper end to the lower end in Figures 5 and 6). As shown in Figure 6, a stepped portion 18c is formed at the ends of the left and right guide surfaces (inclined surfaces) 18b, 18b by a surface that intersects the guide surface 18b at an obtuse angle. The rolling rollers 15, 15 fall into this stepped portion 18c when the waterproof plate 4 rotates 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 project rearward, and restricting portions 19c, 19c that extend inward to 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.

Furthermore, 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 (below the waterproof plate 4 in the upright position) than the rail member 18. Specifically, as shown in Figure 5, the starting end of the restricting portion 19c is positioned below 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 waterproof plate 4 is in the lowered position.

Next, we will describe the bracket 30 connected to the tip of the cylinder rod 511 of the erection mechanism 5. As shown in Figure 8, the bracket 30 comprises a base portion 31 that is roughly rectangular in front view, and erection portions 32, 32 that rise from the left and right sides of the base portion 31.

The base portion 31 has a through hole 31a that penetrates vertically (in the direction of the upright portions 32, 32) and a through hole 31b that penetrates horizontally. The through holes 31a and 31b are in communication with each other.

The upright portions 32, 32 have elongated holes 32a, 32a that penetrate horizontally and are elongated vertically, positioned opposite each other on the left and right sides.

As shown in Figure 9, the tip of the cylinder rod 511 is inserted through the through-hole 31a of the bracket 30. This tip has a hole (not shown) that penetrates in the left-right direction. The bracket 30 is connected to the tip of the cylinder rod 511 by inserting and fastening a bolt and nut 40 through this hole and the through-hole 31b.

The connecting shaft 522 in the middle of the arm 52 of the uprighting mechanism 5 is inserted through the elongated holes 32a, 32a provided in the upright portions 32, 32 of the bracket 30. That is, the bracket 30 is allowed to move a slight relative distance Δini relative to the connecting shaft 522 of the arm 52. In other words, some play is created in the connection between the cylinder rod 511 and the arm 52.

As shown in Figure 10, the control device C consists of a control panel C1 and an operation panel C2. The control panel C1 is connected to a power supply cable LN1 extending from an external power source, such as a commercial power supply, and to a control signal cable LN2 extending from the operation panel C2.

Furthermore, the power supply wiring LN3 and the control signal wiring LN4 extending from the control panel C1 are connected to the connection box 50.

Furthermore, the connection box 50 is connected to each electric cylinder 51 via power supply wiring LN5 and control signal wiring LN6.

Next, the operation and effects of the waterproofing panel device 1 will be explained. As shown in Figures 1 to 3, under normal conditions, the waterproofing panel 4 is completely reclined, and its upper surface is almost flush with the floor surface F. In emergencies such as floods or torrential rain, when it becomes necessary to prevent water from entering the building, the control device C is operated to simultaneously activate each of the raising mechanisms 5.

When each of the lifting mechanisms 5 is activated, the arm 52 gradually rotates upward around one end (the front end). Then, the rolling rollers 15, 15, pivotally supported at the other end of the arm 52, come into contact with the guide surfaces 18b of the rail members 18, 18 on the back surface of the waterproof plate 4, causing the waterproof plate 4 to gradually push upward while moving downward relative to the rollers.

As shown in Figures 4 to 6, when the waterproof plate 4 rotates to the upright position, the rolling roller 15 drops into the stepped portion 18c of the rail member 18.

To return the waterproof plate 4 to its lowered position, the control device C is operated to reverse the rotation of the motor 512 of the electric cylinder 51. This causes the arm 52 to rotate backward, and the rolling roller 15 disengages from the stepped portion 18c. The rolling roller 15 then contacts the restricting portion 19c of the guard member 19, and the waterproof plate 4 is pushed in the lowered direction via the restricting portion 19c.

Then, when the cylinder rod 511 retracts to its minimum stroke position, the motor 512 automatically stops, and the waterproof plate 4 rotates to its lowered position and stops.

Next, the maintenance and inspection procedures for the electric cylinder 51 will be explained based on Figures 9 to 13.

As shown in Figure 9, when the waterproof plate 4 is in the lowered position, each cylinder rod 511 is in its minimum stroke position (i.e., the initial position of the electric cylinder 51), and the connecting shaft 522 of the arm 52 is positioned at the front end of the elongated holes 32a, 32a of the bracket 30.

When performing maintenance and inspection work on the electric cylinder 51, the control device C is operated. Specifically, as shown in Figure 12(a), the control panel C2 has a display unit SC, and the main screen P1 of the display unit SC displays an up button B1 for raising the waterproof plate 4, a down button B2 for lowering the waterproof plate 4, a stop button B3 for stopping the operation of the waterproof plate 4, and an inspection button B4 for performing maintenance and inspection work on the electric cylinder 51. By operating the up button B1, down button B2, and stop button B3 as appropriate, the normal operation of the waterproof plate 4 can be performed.

As shown in Figure 12(b), when the inspection button B4 is pressed, the display unit SC switches to the inspection screen P2. The inspection screen P2 displays the inspection start button B10, the inspection interruption button B11, and the return button B12, which returns to the main screen P1.

When the inspection start button B10 is pressed, the electric cylinder 51 is driven in the extension direction, and the cylinder rod 511 extends a predetermined distance Δtest from the minimum stroke position (see Figure 11). Then, the drive of the electric cylinder 51 is stopped for a predetermined time (e.g., several seconds). After that, the electric cylinder 51 is driven in the retraction direction, and the cylinder rod 511 retracts to the minimum stroke position (see Figure 9). Here, since the distance Δtest is set to less than the distance Δini, the connecting shaft 522 of the arm 52 does not contact the front end of the elongated holes 32a, 32a of the bracket 30 during the inspection operation (see Figure 11).

Furthermore, if the inspection interruption button B11 is pressed during the inspection operation of the electric cylinder 51, the inspection operation of the electric cylinder 51 will be interrupted. Also, the control panel C1 is capable of accepting operation of the control device C for the next maintenance inspection when the cylinder rod 511 is in the minimum stroke position.

The PLC (Programmable Logic Controller) installed in the control panel C1 monitors the position information of the cylinder rod 511 output from each electric cylinder 51 in the forward and backward directions during the inspection operation of each electric cylinder 51, thereby determining whether each electric cylinder 51 has operated normally. In other words, the control panel C1 of the control device C functions as a monitoring means for monitoring the operation of the electric cylinders 51. Note that the monitoring may also determine whether each electric cylinder 51 has operated normally based only on the position information during extension or only on the position information during retraction of the cylinder rod 511.

As shown in Figure 13(a), when the inspection operation of each electric cylinder 51 is successfully completed, the control panel C1 displays a pop-up message on the display unit SC indicating that the inspection operation of each electric cylinder 51 has been completed.

On the other hand, as shown in Figure 13(b), during the inspection operation of the electric cylinders 51, if the error between the operation of any of the electric cylinders 51 and the operation instruction from the control device C falls outside the acceptable range, the control panel C1 displays a pop-up message on the display unit SC indicating that an abnormality has occurred in the electric cylinder 51.

If a malfunction occurs in the electric cylinder 51 (in this embodiment, a malfunction in the central electric cylinder 51), the waterproof plate 4 can be raised using the left and right electric cylinders 51, or another lifting mechanism such as a hydraulic cylinder from the outside, allowing maintenance to be performed on the malfunctioning electric cylinder 51.

As explained above, the control panel C1 operates only the electric cylinder 51 without operating the waterproof plate 4, collecting information on the electric cylinder 51 and electrical components, and monitoring whether it is functioning correctly. This allows for a determination of whether maintenance is required for the electric cylinder 51 and electrical components, thus simplifying the maintenance and inspection of the waterproof plate device 1.

Furthermore, there is play in the connection between the uprighting mechanism 5 and the waterproof plate 4. This allows the electric cylinder 51 to be driven without operating the waterproof plate 4, using a simple structure. Additionally, compared to a configuration where there is play in the connection between the uprighting mechanism 5 and the case 3, the operation of the uprighting mechanism 5 can be stabilized.

Furthermore, the lifting mechanism 5 is equipped with an arm 52 that receives driving force from the electric cylinder 51 and transmits force to the waterproof plate 4. The connecting shaft 522 of the arm 52 is inserted through elongated holes 32a, 32a provided at the tip of the cylinder rod 511, allowing for relative movement in the extension and retraction direction. This configuration allows the electric cylinder 51 to be driven without the load of the waterproof plate 4 being applied to it, as the arm 52 supports the waterproof plate 4.

Furthermore, since a bracket 30 with elongated holes 32a, 32a is attached to the tip of the cylinder rod 511, the inspection distance of the electric cylinder 51 can be easily changed by replacing the bracket 30.

Furthermore, since the control panel C1 is configured to return the cylinder rod 511 to its initial position after monitoring the inspection operation of the electric cylinder 51, the inspection operation of the electric cylinder 51 can be continuously monitored.

Furthermore, since the electric cylinder 51 has an external output function that detects its own operating status and outputs it to the control device C, the operation of the electric cylinder 51 can be monitored with a simple structure.

While embodiments of the present invention have been described above based on the drawings, the specific configurations are not limited to these embodiments. Additions and modifications that do not depart from the spirit of the present invention are also included within the scope of the present invention.

For example, in this embodiment, the control device C is shown to monitor the positional information of the cylinder rod 511 in the forward and backward direction, which is output from the electric cylinder 51. However, it is not limited to this configuration; it may also monitor the current value or voltage value supplied to the electric cylinder 51. Furthermore, the deformation amount of the cylinder rod 511 may be monitored using a strain sensor. Additionally, the internal temperature of the electric cylinder may be monitored using a temperature sensor. Moreover, multiple monitoring methods may be combined.

Furthermore, in the above embodiment, a configuration was illustrated in which the electric cylinder 51 operates within a range where the connecting shaft 522 of the arm 52 does not contact the front ends of the elongated holes 32a, 32a of the bracket 30 during inspection. However, the torque after the connecting shaft 522 contacts the front ends of the elongated holes 32a, 32a may also be monitored.

Furthermore, while the above embodiment illustrates a configuration in which there is play in the connection between the uprighting mechanism 5 and the waterproof plate 4, allowing monitoring of the operation of the electric cylinder 51 while the waterproof plate 4 is not moving from the lowered position, the embodiment is not limited to this configuration. The electric cylinder 51 and the waterproof plate 4 may be connected by a clutch, and during inspection of the electric cylinder 51, the electric cylinder 51 and the waterproof plate 4 may be disconnected and operated separately.

Furthermore, while the above embodiment illustrates a configuration with play in the connection between the uprighting mechanism 5 and the waterproof plate 4, it is not limited to this configuration; play may also be present in the connection between the uprighting mechanism 5 and the case 3. Even in this case, the electric cylinder 51 can be driven without operating the waterproof plate 4 using a simple structure.

Furthermore, while the above embodiment illustrates a configuration in which a connecting shaft 522 is provided on the arm 52 and elongated holes 32a, 32a are provided on the cylinder rod 511, it is also possible to provide elongated holes on the arm 52 and a connecting shaft on the cylinder rod 511.

1. Waterproof plate device 3. Case (base)
4 Waterproof plate 5 Elevating mechanism 9 Opening 30 Bracket 32a Slotted hole 51 Electric cylinder (actuator)
52. Arm (link mechanism)
522 Connecting shaft C Control device C1 Control panel (monitoring means)
C2 Control panel

Claims (6)

A waterproof plate device comprising a waterproof plate pivotally attached to a base so as to be able to rotate vertically between a reclined position and an upright position, and an upright mechanism that pushes the waterproof plate up to the upright position,
The aforementioned standing mechanism is equipped with an electric actuator.
A waterproof plate device characterized by comprising monitoring means for monitoring the operation of the actuator when the waterproof plate is not moving from the folded position. The waterproof plate device according to claim 1, characterized in that there is play in the connection between the uprighting mechanism and the base. The waterproof plate device according to claim 1, characterized in that there is play in the connection between the uprighting mechanism and the waterproof plate. The aforementioned lifting mechanism is provided with a link mechanism that receives driving force from the actuator and transmits force to the waterproof plate.
The waterproof plate device according to claim 3, characterized in that there is play in the connection between the actuator and the link mechanism. A waterproof plate device according to any one of claims 1 to 4, characterized in that, after monitoring the operation of the actuator, the actuator is returned to its initial position. The waterproof plate device according to claim 1, characterized in that the actuator has an external output function for outputting operation information.