JPH0426037B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a tunnel flooding prevention device that prevents power cables and their ancillary equipment stored in underground tunnels from flooding due to inflow of rainwater, etc. It is.

<Prior art> In general, a vent communicating with a tunnel acts as a vent for air into the tunnel, but due to road management constraints, the vent is designed to be flush with the road surface. It has a finished structure. Therefore, when it rains, especially a large amount of rain in a short period of time such as heavy rain, the rainwater that floods the road surface flows into the tunnel through the ventilation holes, causing unexpected accidents such as flooding of power cables etc. stored in the tunnel. There is a problem with dropping it.

For example, Japanese Patent Publication No. 57-15280 has been proposed to solve the above-mentioned problems.

This will be explained based on the drawing shown in FIG. 13 as follows.

An opening 1 is formed in the ventilation hole A communicating with the tunnel by a device base B provided on the periphery of the inner wall surface, and the opening 1 is formed by a bearing 2 fixed to the base B. It is configured to be closed by a lid body 3 which is rotatably supported by the lid body 3. A fixed engagement claw 4 is attached to the lid body 3, and the fixed engagement claw 4 engages with a movable engagement claw 5 fixed to the inner wall surface of the ventilation hole opposite to the fixed engagement claw 4. , the lid 3 is always kept open. A support rod 6 is rotatably attached to the movable engagement claw 5,
A float 7 is fixed to the tip of the support rod 6.
The float 7 is housed in a water tank 8 provided on the inner wall of the ventilation hole, and is configured to operate when the level of rainwater accumulated in the water tank 8 increases. Then, when the lid body 3 is operated, the support rod 6 that fixed the float 7 is activated, and the movable engagement claw 5 to which the support rod 6 is attached is rotated, so that the lid body 3 is disengaged from the fixed engagement claw 4. As a result, the opening 1 is tilted in the closing direction and the opening 1 is closed.

<Problems to be Solved by the Invention> In the above-mentioned prior art, when the lid 3 that has closed the opening 1 formed by the base part B in the ventilation hole is opened again, the The structure is such that it is pulled up using a chain or a pull rod.

Therefore, in response to a request to open the closed lid from inside the sinus tract, it is necessary to provide a separate opening means.

In addition, when the opening area of the ventilation hole on the road side is large, the device itself becomes larger, and when the lid is closed due to the larger size, the impact noise increases when the lid comes into contact with the foundation, and the blockage increases. This causes problems such as a large amount of force being required to open the lid later.

In this case, it is also possible to divide the ventilation hole into a plurality of small openings by the base and install the device in each opening, but in this method, the opening is closed by the lid. In order to close them at the same time, separate means are required, such as a means to operate the floats at the same time, and when opening, it is necessary to pull up each lid, which makes the work complicated. .

Therefore, in order to eliminate the above-mentioned conventional drawbacks, the present invention makes it possible to open the lid that closes the opening formed by the foundation in the ventilation hole from the ground or from inside the tunnel, and also makes it possible to open the opening of the ventilation hole. In cases where the area is large, the purpose is to obtain a device for preventing flooding in a tunnel that can be divided into a plurality of small openings by the foundation and each small opening can be opened and closed simultaneously with one device. It is something to do.

<Means for solving the problem> The means for achieving the above objective are as follows.

That is, (a) at least one opening is formed in the ventilation hole communicating with the tunnel in which the power cable etc. are housed by a base provided on the periphery of the inner wall surface.

(b) On the base, a lid that closes the opening and has a rubber elastic seal on the lower peripheral edge is rotatably supported on a bearing fixed to the base.

(c) The inner wall surface of the vent includes an opening operating shaft extending vertically along the inner wall surface, a rotating drum that engages with the operating shaft via a gear mechanism, and a rotating drum that engages with the operating shaft in the open position of the lid. An opening/closing device is installed which includes a ratchet mechanism for preventing rotation of the rotating drum and an actuating bar with a bucket connected to the ratchet mechanism.

(d) the lid body has one end fixed to the rotating drum;
The other end engages with a pulley attached to the opening/closing device and a pulley fixed to the inner wall surface of the vent opposite to the opening/closing device, and is connected directly to the lid body or to a movable pulley fixed to the lid body. It is supported by a single wire rope that is engaged, rotated, and fixed to the inner wall surface.

We are taking technical measures.

In the above-mentioned technical means, when the opening formed by the base in the ventilation hole is further divided into two small openings, the lid body that closes each small opening has one end The rotary drum is fixed to the rotary drum, and the other end engages with a pulley attached to the opening/closing device, a pulley fixed to the inner wall surface of the vent facing the opening/closing device, and a movable pulley fixed to one lid body. and then engages with a turning pulley fixed to the inner wall surface and directly onto the other lid body, or engages with a movable pulley fixed to the other lid body, then turns and is fixed to the inner wall surface. A measure is taken in which the wire rope is supported by a single wire rope.

<Operation> Rainwater that floods the road surface due to heavy rain is guided from the gutter to the introduction pipe and falls onto the bucket.

When the impact of falling water is applied to the bucket, the ratchet mechanism that prevents the rotating drum from rotating when the lid is opened is disengaged, leaving the rotating drum free to rotate.

Thereby, the lid body supports the lid body under tension, and tilts the wire rope wound around the rotating drum while unwinding it from the rotating drum, thereby closing the opening formed by the base portion.

By closing the opening with the lid, a water storage chamber is formed within the vent, and rainwater is stored in the water storage chamber to prevent it from flowing into the tunnel.

After that, after draining the rainwater that accumulated in the water storage room,
A handle is fitted to the end of the opening operation shaft of the opening/closing device, and by operating the handle, the rotational force of the opening operation shaft is transmitted to the rotating drum via the gear mechanism, and the rotating drum is connected to the lid body. The lid rotates while winding up the wire rope supporting it, and the lid opens while being pulled by the wire rope.

In the open position of the lid, a ratchet mechanism engages to prevent rotation of the rotating drum, and the lid is held taut by the wire rope.

Even in the case where the opening formed by the base in the ventilation hole is divided into two small openings, and each small opening is closed with a lid,
Since each lid body is supported by one wire rope, the two small openings can be opened and closed by one opening/closing device by the same operation as described above.

<Embodiments> The present invention will be described below with reference to FIGS. 1 to 12 of the accompanying drawings showing embodiments thereof.

In the figure, a ventilation hole A that communicates with a tunnel in which power cables and the like are housed opens toward the road surface. A base portion B is provided within the vent hole A at the periphery of the inner wall surface thereof, and an opening portion 10 is formed within the vent hole A by the base portion B.

Reference numeral 11 denotes a lid that closes the opening 10, and shafts 12, 12 protruding from the side surfaces of the lid 11 are fixed to the lower end of the lid 11, respectively.
The lid body 11 has shafts 12, 12 rotatably supported by bearings 13, 13 fixed to the base part B.

Here, the axes of the shafts 12, 12 fixed to the lid 11 are not located on the vertical line passing through the center of gravity of the lid 11, but are positioned on the open side of the lid 11 during assembly. A rotational moment is applied to the lid 11 in the closing direction, so that the lid 11 is always tilted (rotated) in the closing direction (FIG. 4).

Reference numeral 14 denotes a seal made of a rubber elastic body attached to the peripheral edge of the lower surface of the lid body 11, and the penetrating seal 1
4 enhances the sealing effect between the lid 11 and the base portion B when the lid 11 closes the opening 10.

The opening 1 is formed by the base portion B, and the lid body 11 is rotatably supported by the bearings 13, 13.
0, a water storage chamber R is formed in the ventilation hole A by the inner wall surface of the ventilation hole A, the base part B, and the lid 11.

15 is a lid opening/closing device attached to the inner wall surface of the vent A.

16 is a base of the opening/closing device 15, and 17 is a support plate fixed to bolts 18...18 fixed on the base 16.

19, 19 are support frames fixed on the support plate 17 at a predetermined interval, and the support frames 19, 1
9, an opening operation shaft 20 extending in the vertical direction along the wall surface of the ventilation hole A with one end inserted into the road surface side opening of the ventilation hole and the other end inserted through the base part B is rotatable via a bearing. is supported by A fitting shaft portion 20 into which a handle is fitted is provided at both ends of the operating shaft 20, respectively.
20 are provided.

21 is a bevel gear fixed to the opening operation shaft 20.

A rotating shaft 22 is rotatably supported between the base 16 and the support plate 17 via a bearing, and one end of the rotating shaft 22 is arranged to protrude from the support plate 17. A bevel gear 23 that meshes with the bevel gear 21 is fixed to an end of the rotating shaft 22.

24 is a ratchet wheel fixed to the rotating shaft 22, and 25 is a spur gear fixed to the rotating shaft 22. The spur gear 25, the bevel gear 23 fixed to the rotating shaft 22, and the bevel gear 2 fixed to the opening operation shaft 20.
1 constitutes a gear mechanism section that transmits the rotational force of the opening operation shaft 20 to a rotating drum, which will be described later.

26 is a fixed shaft fixed between the base 16 and the support plate 17, and 27 is a rotary drum rotatably arranged on the fixed shaft 26 via a bearing.

The rotating drum 27 includes a body part 28 for winding and holding a wire rope, which will be described later, and flange parts 29 and 30 at both ends of the body part 28. Engaging teeth 3 that mesh with the spur gear 25 are provided on the outer peripheral surface of the flange portion 29.
1 is provided.

32 is a lever equipped with a pawl 33 that engages with the ratchet wheel 24, and the lever 32 is connected to the support plate 17.
It is rotatably attached to a pin 34 fixed to the pin axis. The lever 32 provided with the pawl 33 and the ratchet wheel 24 constitute a ratchet mechanism that prevents rotation of the rotary drum 27 when the lid 11 is opened.

Reference numeral 35 denotes a weight fixed to the lever 32. The weight 35 constantly applies a rotational force to the lever 32 in the clockwise direction around the pin axis.
A pawl 33 provided at 2 is constantly engaged with a ratchet wheel 24.

36 is a support rod attached to the lever 32 in close proximity to a claw 33 provided on the lever 32.

Reference numeral 37 denotes a lid body 1 rotatably supported on a shaft 38 fixed to the base 16 via a bearing.
1, and a bucket (water receptacle) 39 is integrally provided at the tip of the operating bar 37.

40 is a weight fixed to the operating bar 36;
The weight 40 constantly applies a rotational force to the operating bar 37 in the clockwise direction around the shaft 38 . The actuation bar 37 is connected to the support rod 36.

Reference numeral 41 denotes a wire rope that tensionably holds the lid 11 in the open position. One end of the wire rope 41 is fixed to the front rotating drum 27, and the other end engages with a pulley 42 attached to the opening/closing device 15. , and is further engaged with a pulley 43 fixed to the inner wall surface of the vent opposite to the inner wall of the vent to which the opening/closing device 15 is attached, and is fixed to the lid 11 (FIG. 3).

FIGS. 7 and 8 are schematic diagrams showing other engagement relationships between the wire rope 41 that tension-supports the lid 11 and each pulley.

That is, in FIG. 7, one end of the lid body 11 is rotated by the rotating drum 27, the other end is engaged with the pulley 42 attached to the opening/closing device 15, and then the lid body 11 is rotated by the rotating drum 27.
5 is attached to a pulley 43 fixed to the inner wall surface of the vent hole opposite to the inner wall surface of the vent hole, and further engages a movable pulley 44 fixed to the lid body 11 to rotate,
This shows a mode in which the wire rope 41 is tension-supported by a wire rope 41 fixed to the inner wall surface.

Further, FIG. 8 shows a mode similar to that shown in FIG. The grooves are arranged horizontally parallel to the inner wall surface of the ventilation hole, and each pulley is connected to the frame 45 fixed to the wall surface or the lid body by pins 46, 46, as shown in FIG. It is attached around the body so that it can swing freely.

Wire rope 4 shown in Figures 7 and 8
1 and each pulley, especially when re-opening the lid 11 that has closed the opening 10, the opening force (rotational force of the handle fitted to the opening operation shaft 20) at the time of opening is as shown in Fig. 3. This has the advantage that it can be opened with half the force compared to the engagement method shown in .

Reference numeral 47 denotes a gutter provided at the inner peripheral edge of the road surface side opening of the ventilation hole A.

Reference numeral 48 denotes a water guide pipe that is attached to the gutter 47 and collects rainwater flowing in through the gutter 47 in one place, and the tip of the introduction pipe 48 is connected to the bucket 39.
It extends to the vicinity of.

Reference numeral 49 denotes a grating arranged at the open end of the ventilation hole A on the road surface side.

50 is a faucet provided in the base part B.

Next, the operation of this embodiment will be explained.

Rainwater that has flooded the road surface due to heavy rain is guided to a water guide pipe 48 through a gutter 47 provided on the inner wall surface of the road-side opening end of the ventilation hole A, and is passed through the water guide pipe 48 onto a bucket (water receiver) 39. fall into the water.

When a shock is applied to the bucket 39 by falling water, the operating bar 37 integrally provided with the bucket 39 rotates counterclockwise around the shaft 38. As the actuation bar 37 rotates, the support rod 36, which has one end attached to the actuation bar 37, is pulled downward.
The lever 32 connected to the support rod 36 rotates counterclockwise around the pin 34. As the lever 32 rotates, the pawl 33 provided on the lever 32 and the ratchet wheel 24 are disengaged.

By disengaging the pawl 33 and the ratchet wheel 24, the rotating drum 27 is placed in a freely rotatable state.

As a result, the lid body 11 supports the lid body 11 under tension, and tilts the wire rope 41 wound around the rotary drum 27 while unwinding it from the rotary drum 27. opening 1
Block 0. In addition, if the bucket 39 is not subjected to the impact force caused by falling water continuously for a certain period of time or more, the claw 33 will automatically engage the ratchet wheel 24 by the weight 35 of the lever 32, and the closing operation of the lid 11 will be stopped. Interrupted. Therefore, even if a pebble or the like accidentally passes through the gutter 47 and impacts the bucket 39, the lid 11 will only be tilted by a small angle, and malfunctions caused by anything other than rainwater can be avoided. By closing the opening 10 with the lid 11, a water storage chamber R is formed in the ventilation hole A, and rainwater is stored in the water storage chamber R to prevent rainwater from flowing into the tunnel. .

Thereafter, after opening the water faucet 50 provided on the foundation B to drain the rainwater accumulated in the water storage chamber R, a handle is fitted to the end of the opening operation shaft 20 of the opening/closing device 15, and the handle is By rotating the operating shaft 20 by operation, the rotational force of the operating shaft 20 is transmitted to the rotating shaft 22 to which a bevel gear 23 meshed with a bevel gear 21 fixed to the operating shaft is fixed. The rotation of the rotating shaft 22 causes the ratchet wheel 24 and spur gear 25 fixed to the rotating shaft 22 to rotate, thereby rotating the rotating drum 27 that meshes with the spur gear 25.

At this time, the pawl 33 provided on the lever 32 is engaged with the ratchet wheel 24, but since it rotates freely in this direction, the rotation of the rotary drum 27 is not hindered.

As the rotating drum 27 rotates, one wire rope 41, whose one end is fixed to the rotating drum 27 and the other end engages with each pulley and engages with the lid body, is wound around the rotating drum 27, and the lid is closed. The body 11 is opened.

In the open position of the lid 11, the pawl 33 engages with the ratchet wheel 24 to prevent rotation of the rotating drum 27, so that the lid 11 is supported under tension by the wire rope 41 and held in the open position.

FIG. 10 is a diagram showing still another embodiment of the present invention. In this embodiment, the opening area of the ventilation hole A is large, and the opening formed by the base part B in the ventilation hole A is divided into two small openings 1.
0' and 10', and each small opening 10' is opened and closed by lids 11 and 11, respectively.

The lids 11, 11 have one end fixed to the rotating drum 27, and the other end fixed to a pulley 4 attached to the opening/closing device 15.
2 engages with a pulley 43 fixed to the inner wall surface of the ventilation hole facing the opening/closing device 15, engages with a movable pulley 44 fixed to one lid body 11 to rotate, and Fixed pulley 43 and turning pulley 5
1 and 51, and then engaged with a pulley 52 fixed to the inner wall surface, and is supported by one wire rope 41 fixed to the other lid body 11.

In addition, as a method of engaging the wire rope 41 with each pulley, the wire rope 41 is engaged with the pulley 45, and then the movable pulley fixed to the other lid body 11 is engaged and rotated. book wire rope 4
1 can also support the lid.

According to this embodiment, one switchgear 15 and one
Two lid bodies 11, 1 with book wire rope 41
1 can be opened and closed.

FIGS. 11 and 12 are diagrams showing still another embodiment of the present invention.

This embodiment is provided with a buffer body 53 that cushions the impact of the lid 11 against the base B, especially when the lid 11 is closed.

FIG. 11 shows a hydraulic cylinder 5 as a shock absorber 53.
4, the cylindrical body 55 of the hydraulic cylinder 54 is rotatably attached to the inner wall surface of the vent hole A, and the piston rod 56 of the cylinder 54 is rotatably attached to the lid 11.

Further, in FIG. 12, a hydraulic cylinder 54 is used as the buffer 53, and the cylindrical body 5 of the hydraulic cylinder 54 is
5 is fixed to the base part B, and the tip of the piston rod 56 is arranged so as to protrude from the opening 10 when the lid 11 is opened.

By providing the buffer 53 in this way,
When the lid body 11 is closed, the lid body 11 is prevented from shockingly abutting against the base portion B, and generation of impact noises and the like at the time of abutment is prevented.

<Effects of the Invention> The present invention having the above-described configuration and operation has the following unique effects.

When the lid body is closed, it can be opened again by fitting a handle to the end of the opening operation shaft and operating the handle, and the opening can be done either from the ground or from within the tunnel. be able to.

Even when the opening area of the ventilation hole is large and a plurality of small openings are formed in the ventilation hole by the base and each small opening is opened and closed by each lid, each Since the lid body is engaged with one wire rope, the opening and closing operation can be performed with one opening/closing device.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of the tunnel flooding prevention device of the present invention, FIG. 2 is a plan view showing the foundation, and FIG. 3 is a plan view showing the engagement state of the lid body, pulley, and wire rope at the time of closure. Figure 4 is a side view showing the lid;
The figure is a cross-sectional side view showing the opening/closing device, FIG. 6 is a front view showing the main parts of the opening/closing device, FIGS. 7 to 8 are schematic diagrams showing the method of engaging the lid body, wire rope, and pulley, The figure is a plan view showing a pulley, FIG. 10 is a plan view showing another embodiment, FIGS. 11 and 12 are side views showing the arrangement of the buffer body, and FIG. 13 is a sectional side view showing the prior art. It is. A... Ventilation hole, B... Foundation, 10... Opening, 11... Lid, R... Water storage chamber, 15... Opening/closing device, 20... Opening operation shaft, 24... Rattle wheel, 2
7...Rotating drum, 33...Claw, 39...Bucket, 41...Wire rope, 42,43...Pulley.

Claims (1)

[Scope of Claims] 1. At least one opening is formed in the ventilation hole communicating with the tunnel in which power cables etc. are housed by a base provided on the periphery of the inner wall thereof, and the base A lid body that closes the opening and has a rubber elastic seal on the lower peripheral edge is rotatably supported on a bearing fixed to the base,
The inner wall surface of the ventilation hole includes an opening operating shaft extending vertically along the wall surface, a rotating drum that engages with the operating shaft via a gear mechanism, and a rotary drum that rotates when the lid is open. An opening/closing device is attached that includes a ratchet mechanism for preventing rotation and an actuating bar with a bucket connected to the ratchet mechanism, and the lid is fixed at one end to the rotating drum and at the other end. Engages with a pulley attached to the opening/closing device and a pulley fixed to the inner wall surface of the vent facing opposite to the opening/closing device, and engages directly with the lid, or engages with a movable pulley fixed to the lid. A device for preventing flooding in a tunnel, characterized in that it is supported by a single wire rope that is rotated and fixed to the inner wall surface. 2. Two openings are formed in the ventilation hole by the base, and each lid that closes each opening has one end fixed to the rotating drum and the other end attached to the opening/closing device. It engages with a pulley fixed to the inner wall surface of the vent facing the opening/closing device and a movable pulley fixed to one of the lids, and further rotates and engages with a turning pulley fixed to the inner wall surface. It is characterized by being engaged directly with the other lid body or with a movable pulley fixed to the other lid body, pivoted and supported by a single wire rope fixed to the inner wall surface. A device for preventing flooding in a tunnel according to claim 1. 3. A patent characterized in that a buffer body consisting of a hydraulic cylinder is provided between the lid and the base to prevent the lid from impactfully contacting the base when the lid is closed. A device for preventing flooding in a tunnel according to claim 1.