JPH0327120Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to prevent rainwater, etc. flowing from the ventilation holes of cable tunnels, etc., from entering underground structures such as tunnels during rain or floods. This relates to a watertight lid that automatically closes the watertight lid.

[Prior Art] Ventilation holes in cable tunnels and the like need to be prevented from infiltrating the tunnel side with rainwater, etc., flowing in through gaps in iron covers, etc. that cover the openings of the ventilation holes during heavy rains or floods. Therefore, this type of ventilation hole is usually provided with a watertight lid that automatically closes the ventilation hole when rainwater or the like flows in in an amount exceeding the drainage capacity.

This conventional watertight lid has a water collection container with a drainage hole that matches the drainage capacity installed in the ventilation hole, and the slanted watertight lid in the opened state is locked to a ball-tap lever floating on the water collection container. If rainwater flows in in an amount exceeding the drainage capacity during heavy rain, etc., the water level in the water collection container rises and the ball tap floats to release the lock, and the overturned watertight lid closes this ventilation hole. There is something that automatically blocks the

There is also a watertight lid that is linked to a rain gauge and automatically closes and opens using electric power.

[Problem that the invention attempts to solve]

Therefore, the above-mentioned conventional watertight lid requires devices such as a water collection container and a ball tap, and it is troublesome to lock the lid to the lever of the ball tap when setting the lid to the open state again. There was a risk that the watertight lid would lift up due to wind pressure from the tunnel side, and the lock would naturally be released and block the ventilation hole.

In addition, watertight lids that automatically close and open in conjunction with rain gauges are often accompanied by power outages during times of heavy rain, so the lids may not close when needed, or they may not close when needed, or if the installation location is humid and the lid is closed. Since the opening operation is extremely infrequent, there are problems such as the risk of malfunction due to poor contact or electrical leakage.

The present invention has been developed in view of the above points, and aims to provide an automatic tipping type watertight lid that has a simple structure and can be closed accurately.

[Means for solving problems]

As a means to solve the above-mentioned problems, the present invention is installed in an opening such as a ventilation hole so that it can be opened and closed, so that rainwater, etc. that flows through the opening of the opening during rain or flood can be used to prevent structures such as tunnels. In a watertight lid that prevents water from entering the watertight lid, a watertight frame is provided around the inside of the aperture wall, a watertight lid is rotatably supported on the upper surface of the watertight frame, and a mark on the watertight lid is provided. An elastic sealing material is provided at the front water-stopping frame abutting part so as to protrude slightly from the periphery of the watertight lid, and this watertight lid stores inflowing rainwater between the watertight lid and the aperture wall that stand up when the lid is opened. A water storage part is formed, and when a certain amount of rainwater or the like accumulates in the water storage part, it falls over due to the water pressure of this rainwater, etc., and comes into close contact with the water stop frame via the elastic sealing material to close the opening. It is characterized by being placed in

[Effect]

With this configuration, when rainwater, etc. flows in from the opening during heavy rain, more than a certain amount of rainwater, etc. will be stored in the water storage area formed between the watertight lid and the ventilation hole wall when the lid is open. The water pressure of this rainwater or the like automatically causes the watertight lid to fall onto the water stop frame, thereby watertightly closing the ventilation hole.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a self-tipping type watertight cover for a ventilation hole of a cable tunnel will be described based on the drawings.

A rectangular ventilation hole 1 which also serves as a manhole leading to the ground surface from an underground cable tunnel (not shown) for accommodating telegraph/telephone lines, etc., has an opening 1a in the ground surface that is closed off with a grating or an iron cover 2 to allow ventilation. In the vicinity of the opening 1a in the ventilation hole 1, a rectangular water stop frame 4, which serves as a receiving frame for the watertight lid 3, is inclined and installed around the inner peripheral wall 1b of the ventilation hole 1.
The watertight lid 3 is rotatably supported by a support portion 5 provided on the lower side 4a of the water stop frame 4.

And, on the opposite side side 4b of the watertight lid 3 that comes into contact with the water stop frame 4 and the sides 4c, 4c,
An elastic sealing material 6 with a hollow edge forms a presser plate 7.
The edge of the elastic sealing material 6 is provided with a screw or the like so that it protrudes slightly outward from the periphery of the watertight lid 3, and a plate-shaped An elastic sealing material 8 is attached in the same manner by applying a presser plate 9 at one end 8a, and the other end 8b, which is the free end of this plate-shaped elastic sealing material 8, is bent and attached to the water stop frame. The plate-shaped elastic sealing material 8 is always in contact with the upper surface of the lower side 4a provided with the support portion 5 of the watertight lid 3 while being pressed by its elastic force. It is arranged so as to be in watertight sliding contact with the surface of the water-stop plate 10 embedded on both sides of the inner peripheral wall of the ventilation hole 1 when the lid is opened, and between the watertight lid 3 that stands up when the lid is opened and the inner peripheral wall 1b of the ventilation hole 1. A water storage section 11 is formed to store rainwater etc. flowing in from the opening 1a.

Furthermore, the side 4a where the support part 5 of the water stop frame 4, which is the bottom part of the water storage part 11 formed when the lid is opened, is provided with a side 4a that is suitable for the drainage capacity of a drainage device (not shown) installed in the cable tunnel. A water hole 12 is provided to allow a large amount of rainwater to flow through.

Next, the operation of the automatic tipping type watertight lid configured as described above will be explained.

The watertight lid 3 inside the ventilation hole 1 of the cable tunnel is
In the normal state, both side edges of the elastic sealing material 6 are in sliding contact with the water stop plate 10, and due to the frictional resistance thereof, the upright open state is maintained, and the watertight lid 3 and the inner circumferential wall 1 are kept in the open state.
A water storage portion 11 is formed between the opening 1a of the ventilation hole 1 and the inner peripheral wall 1 during times of light rain.
Rainwater, etc. flowing into the water storage section 11 through the water storage section 11 is not stored in the water storage section 11, but flows down to the tunnel side through the water passage hole 12 drilled at the bottom of the water storage section 11, and is drained by the drainage device. Drained.

During heavy rains or floods, if the amount of rainwater flowing in from the opening 1a exceeds the drainage capacity, the amount flowing into the water storage section 11 will be greater than the amount drained from the water passage hole 12. The amount of rainwater stored in the water storage section 11 increases, and the water pressure of this rainwater causes the watertight lid 3 to rotate about the support section 5 against the frictional resistance of the elastic sealing material 6.
By falling, the peripheral edge of the elastic sealing material 6 comes into contact with the upper surface side of the water stop frame 4, and the lid is automatically closed to close the ventilation hole 1 watertightly.

After the watertight lid 3 is opened, when the inflowing rainwater increases, the elastic sealing material 6 is pressed even more strongly against the water stop frame 4 due to the water pressure of the rainwater, etc. in addition to the weight of the watertight lid 3, causing the inflow. Sealing performance increases in proportion to the amount of rainwater.

In this embodiment, the water stop frame 4 is provided diagonally, but the ventilation hole 1 is arranged so that the water stop frame 4 is horizontal.
In addition to the ventilation holes of cable tunnels, it can also be applied to watertight covers such as ventilation holes and ventilation holes of underground structures such as subways and underground malls.

[Effect of idea]

As explained above, the present invention provides a water-stop frame around the opening wall of a ventilation hole, etc., a water-tight cover is rotatably supported on the upper surface side of the water-stop frame, and the water-stop frame of the water-tight cover is rotatably supported. In addition to providing an elastic sealing material on the frame abutting part, a water storage part is formed between the watertight lid that stands up when the lid is opened and the open hole wall, and rainwater is stored in this water storage part to prevent inflow during heavy rains or floods. When the amount of rainwater, etc. exceeds a certain level, the watertight lid automatically falls over due to the water pressure of the rainwater, etc. stored in the water storage part, and closes the ventilation hole watertightly. To provide an automatic tipping type watertight lid that can be opened accurately with a simple structure without requiring any device such as a ball tap or a ball tap.

In addition, by drilling a water hole at the bottom of the water storage section with a diameter that matches the drainage capacity of the drainage device, the watertight lid can be prevented from falling over and blocking openings such as ventilation holes during light rain. can do.

[Brief explanation of drawings]

The figures show one embodiment of the present invention. Figure 1 is an explanatory diagram showing the installed state of the watertight lid, Figure 2 is a partially omitted cross-sectional front view showing the watertight lid in the closed state, and Figure 3 is an explanatory diagram showing the watertight lid in the closed state. FIG. 4 is a sectional front view showing the main part in the lid state, and FIG. 4 is a - sectional plan view taken from FIG. 3. 1...Ventilation hole, 1a...Opening, 1b...Inner peripheral wall, 3...Watertight lid, 4...Water stop frame, 5...Support, 6, 8...Elastic sealing material, 10...Stop Water plate, 11...Water storage section, 12...Water hole.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A device that is installed in an opening such as a ventilation hole so that it can be opened and closed, so that rainwater, etc. that flows through the opening of the opening during rain or floods does not infiltrate into a structure such as a tunnel. In a watertight lid that prevents water leakage, a watertight frame is provided around the inside of the aperture wall, a watertight lid is rotatably supported on the upper surface side of the watertight frame, and the watertight lid is brought into contact with the watertight frame. In addition to providing an elastic sealing material in the section, this watertight lid
A water storage part for storing inflowing rainwater is formed between the watertight lid that stands up when the lid is opened and the aperture wall, and when a certain amount of rainwater, etc. accumulates in the water storage part, it falls over due to the water pressure of this rainwater, etc. An automatic tipping type watertight lid, characterized in that the lid is disposed in close contact with the water stop frame via the elastic sealing material so as to close the opening. 2. The water stop frame is provided with a water passage hole at the bottom of the water storage section formed between the upright watertight lid and the open hole wall when the lid is opened, to prevent the watertight lid from tipping over during light rainfall. The self-tipping type watertight lid as set forth in claim 1 of the utility model registration claim, characterized in that it has the following features: