JPH06158676A - Metal cover equipped with alarm function - Google Patents

Abstract

PURPOSE:To prevent accidents by providing a manhole frame with display and alarm means, etc., and a switch, and operating the switch to operate the display and alarm means, etc. CONSTITUTION:When a cover 13 is removed and separated from a frame 12, a switch 15 is operated. Then power is supplied to a display 16 and a speaker 23 via the switch 15 so that the display 16 is turned on and blinks and that the speaker 13 gives an alarm. When the cover 13 is mounted and contacts the frame 12, the switch 15 is restored and power is shut off so that the display 16 is turned off and that the alarm of the speaker 23 is stopped. The display 16 may be omitted and only the speaker 23 may be used or a built-in battery may be used in place of an external power source. The accident of dropping into a manhole opening can then be prevented by reporting the dangerous state of the manhole opening, and the reliability of alarming can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment utilizing underground,
For example, it relates to a metal lid used to open and close a manhole for entering and exiting pipelines and tunnels where facilities such as electricity, gas, water, and communication are buried underground, especially the danger due to the opening of the manhole. The present invention relates to a metal cover with a danger notification function, which is designed to prevent serious accidents caused by a fall accident at the opening of a manhole.

[0002]

2. Description of the Related Art Generally, it is necessary to bury underground facilities such as electricity, gas, water, and communication facilities to open and close manholes for entering and exiting pipelines and tunnels. Many lids have been used.

[0003] Conventionally, when a manhole is opened with a gold lid to perform work, a protective fence is used to urge the surroundings to be dangerous.

FIG. 6 is a perspective view showing an outline of safety measures for such manhole opening work. That is, as shown in FIG. 6, when a mandrel 2 covered with a manhole 1 is removed and a person enters into the manhole 1 to work, a protective fence 3 assembled in a grid pattern is provided in advance to carry out the work. Start. In addition, a chain 4 is provided on the protective fence 3 to manage the entry and exit of people. Further, the guard fence 3 is provided with an off-limits tag 5 to promote danger to the surroundings and ensure safety. Incidentally, 6 is a handle provided on the metal lid 2.

By the way, when the manhole is opened, the protective fence 3 can be provided to ensure sufficient safety as described above, but the gold lid 2 is not completely closed except when the manhole is opened. If the user forgets to close the gold lid 2, a person may fall from the opening of the manhole 1 and cause a serious disaster.

[0006]

As described above, there has been a problem in the prior art that when a manhole is opened, a person may fall from the opening of the manhole and cause a serious disaster.

An object of the present invention is to provide an extremely highly reliable risk notification function gold which can promote a danger due to the opening of a manhole to the surroundings and prevent a serious accident due to a fall accident to the opening of the manhole. To provide a lid.

[0008]

[Means for Solving the Problems] In order to achieve the above object, a frame provided at an opening of a manhole used for opening and closing a manhole provided in equipment installed underground such as a pipeline or a tunnel. In the invention according to claim 1, first, in the invention according to claim 1, at least one display means provided in the frame and a fitting portion of the frame and the lid. At least one switch that is provided on the frame side and that operates when the frame and the lid are not mated, and a power supply unit that supplies power to the display unit to light or blink the display unit by the operation of the switch. It is configured with and.

According to the second aspect of the invention, at least one speaker or other sounding means provided on the frame is provided on the frame side of the fitting portion between the frame and the lid. It comprises at least one switch that operates when not engaged, and power supply means that supplies power to the sounding means to generate an alarm sound when the switch is operated.

Further, in the invention according to claim 3, at least one display means provided in the frame, at least one sound generating means such as a speaker provided in the frame, and the frame and the lid are fitted together. At least one switch that is provided on the frame side of the unit and that operates when the frame and the lid are not fitted, and by operating the switch, power is supplied to the display means and the sounding means to turn on or turn off the display means. The sounding means is provided with a power supply means for generating an alarm sound while blinking.

[0011]

Therefore, in the metal lid with the danger alarming function of the present invention, the display means or the sounding means is provided on the frame, and when the frame and the lid are not fitted to each other, on the frame side of the fitting portion of the frame and the lid. By providing the switch that operates, when the lid is detached and the frame and the lid are separated from each other and the fitting between the frame and the lid is released, the switch operates and power is supplied to the display means or the sound producing means.

As a result, when the display means is lit / blinking or the sounding means emits an alarm sound and the lid of the gold lid is opened, the gold lid itself gives a warning and the danger due to the opening of the manhole is presented. You can encourage others.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an example of the construction of a metal lid with a danger warning function (hereinafter simply referred to as a gold lid) according to the present invention, and FIG. 2 is a cross section showing an example of the construction when the same gold lid is attached to a manhole. It is a figure.

In FIGS. 1 and 2, a gold lid 11 of the present embodiment is installed above a manhole 10 provided in an underground facility such as a pipeline or a tunnel. This gold lid 11
Is mainly composed of a frame 12 provided in the opening of the manhole 10 and a lid 13 fitted to the frame 12.

On the other hand, on the upper surface of the frame 12, a fitting groove 14 for accommodating the lid 13 is provided in the circumferential direction, and the groove 1 is also provided.
At least one switch 15 (four in this example) that operates when the frame 12 and the lid 13 are not fitted (that is, when the lid 13 is removed from the frame 12) is provided at the bottom of the No. 4 switch. ing. Further, on the upper surface of the frame 12, at least one (four in this example) indicators 16 are arranged in the circumferential direction.
Here, as the display device 16, for example, an LED or LCD can be used.

On the other hand, a wiring groove 17 is provided between the switch 15 and the display 16, and the wiring groove 17 is provided with one wiring hole 18 in the circumferential direction in order to supply power from the outside.
The terminal block 19 is provided via the. Then, as shown in FIG. 3, since at least one switch 15 is operated, the display unit 16 is operated via the terminal block 19 and the switch 15.
To form a power supply circuit that lights or blinks the display 16.

In the figure, 20 is a handle provided on the lid 13, 21 is a flexible conduit connected to the terminal block 19, and 22 is a flexible conduit.
Shows the conduits connected to the flexible conduit 21, respectively.

Next, the operation of the metal lid 11 of the present embodiment having the above structure will be described.

In the figure, when the lid 13 of the gold lid 11 is removed, the lid 13 is removed and the frame 12 and the lid 13 are separated from each other, so that the fitting between the frame 12 and the lid 13 is released. Switch 15 operates. When this switch 15 operates, the switch 1
Power is supplied to the display unit 16 through 5, and the display unit 16
Lights up or flashes. Thereby, the lid 13 of the gold lid 11
When is opened, the gold lid 11 itself gives a warning, and the danger due to the opening of the manhole 10 is promoted to the surroundings. Although four switches 15 are provided, when any one of them is operated, the display 16 is supplied with power.

On the other hand, when the lid 13 of the gold lid 11 is attached, the lid 13 is attached and the frame 12 and the lid 13 are brought into contact with each other, so that the frame 12 and the lid 13 are fitted to each other. The switch 15 returns. Then, when the switch 15 returns, the power to the display 16 is cut off from the terminal block 19 through the switch 15, and the display 16 is turned off.

As described above, in this embodiment, the frame 12 is used to open and close the manhole 10 provided in equipment installed underground such as pipelines and tunnels, and the frame 12 provided at the opening of the manhole 10, and In a gold lid 11 configured by a lid 13 that fits with the frame 12, four indicators 16 provided on the frame 12 and a frame 12 side of a fitting portion between the frame 12 and the lid 13 are provided. Power supply for supplying power to the display 16 and turning on or blinking the display 16 by operating the four switches 15 that operate when the lid 12 and the lid 13 are not mated and at least one switch 15 operates. It is composed of a circuit.

Therefore, the metal lid 11 for the manhole 10
The display 16 can be turned on / blinking or turned off according to the opening / closing of the, and when the lid 13 of the gold lid 11 is opened, the gold lid 11 itself gives a warning of danger, and the danger due to the opening of the manhole 10 is reduced. It is possible to encourage others.

As a result, it is possible to prevent a serious disaster due to a fall accident at the opening of the manhole 10.

The present invention is not limited to the above embodiment, but can be implemented in the same manner as described below.

(A) In the above embodiment, the indicator 16 is provided on the upper surface of the frame 12, and when the lid 13 of the gold lid 11 is removed, power is supplied to the indicator 16 to turn the indicator 16 on. I explained the case of turning on or blinking, but it is not limited to this,
A speaker, which is a sounding means, may be attached below the frame 12 of the gold lid 11.

FIG. 4 is a sectional view showing an example of the structure in which this kind of metal lid is attached to a manhole, and FIG. 5 is a diagram showing an example of the structure of the same power supply circuit. The basic structure is shown in FIGS. Since this is the same as the embodiment shown in FIG. 3, the same parts as those in FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted.

That is, the present embodiment is different from the above embodiment only in that the speaker 23, which is a sounding means, is attached below the frame 12 of the metal lid 11.

In the gold lid 11 having such a structure, the gold lid 11
When the lid 13 is removed, the lid 13 is removed and the frame 12 and the lid 13 are separated from each other, so that when the fitting between the frame 12 and the lid 13 is released, at least one switch 15 operates. When the switch 15 operates, the terminal block 1
Power is supplied to the display unit 16 and the speaker 23 from the switch 9 through the switch 15, the display unit 16 lights up or blinks, and an alarm sound is emitted from the speaker 23.
Thereby, when the lid 13 of the gold lid 11 is opened, the gold lid 11
The danger notification itself is made, and the danger due to the opening of the manhole 10 is promoted to the surroundings.

On the other hand, when the lid 13 of the gold lid 11 is attached, the lid 13 is attached and the frame 12 and the lid 13 are brought into contact with each other so that the frame 12 and the lid 13 are fitted to each other. The switch 15 returns. Then, when the switch 15 returns, the power to the display 16 and the speaker 23 is cut off from the terminal block 19 through the switch 15, the display 16 is turned off, and the alarm sound from the speaker 23 is stopped.

As described above, in this embodiment, the indicator 16 can be turned on / blinking or turned off and an alarm sound can be generated in the speaker 23 according to the opening / closing of the gold lid 11 with respect to the manhole 10. When the lid 13 of 11 is opened, the gold lid 11 itself gives a warning of danger and the manhole 10
It is possible to more effectively promote the danger caused by the opening of the.

As a result, a serious disaster caused by a fall accident at the opening of the manhole 10 can be further prevented.

(B) In the embodiment shown in FIGS. 4 and 5,
The display unit 16 is arranged on the upper surface of the frame 12, and the speaker 23 is attached below the frame 12 to turn on or blink the display unit 16 when the lid 13 of the gold lid 11 is removed, and at the same time, to the speaker 23. Although the case where the alarm sound is generated has been described, the present invention is not limited to this, and the display device 16 may be omitted and only the speaker 23 that is the sounding means may be attached.

(C) In the above embodiment, the case where the terminal block 19 is provided and power is supplied to the switch 15 and the display 16 from the external power source has been described, but the present invention is not limited to this, and a battery is built in, for example. Power may be supplied to the switch 15 and the display 16 from this battery.

[0035]

As described above, according to the present invention, at least one display means provided on the frame, or at least one sound producing means such as a speaker provided on the frame, and the frame and the lid. At least one switch that is provided on the frame side of the fitting portion and that operates when the frame and the lid are not fitted to each other, and by the operation of the switch, power is supplied to the display means or the sounding means to turn on the display means. Since it is configured with a power supply means for turning on / blinking or for generating a warning sound in the sounding means, it promotes the danger due to the opening of the manhole to the surroundings and causes a serious disaster due to a fall accident to the opening of the manhole. It is possible to provide an extremely reliable metal lid with a danger notification function that can be prevented.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a metal lid according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration example when the metal lid of the same embodiment is attached to a manhole.

FIG. 3 is a diagram showing a configuration example of a power supply circuit in the metal lid of the same embodiment.

FIG. 4 is a cross-sectional view showing a configuration example when a metal lid according to another embodiment of the present invention is attached to a manhole.

FIG. 5 is a diagram showing a configuration example of a power supply circuit in a metal lid of another embodiment.

FIG. 6 is a schematic diagram for explaining a conventional safety measure for manhole opening work.

[Explanation of symbols]

11 ... Gold lid, 12 ... Frame, 13 ... Lid, 14 ... Groove, 15 ... Switch, 16 ... Indicator, 17 ... Wiring groove, 18 ... Wiring port,
19 ... Terminal block, 20 ... Handle, 21 ... Flexible conduit, 22
… Conduit, 23… Speaker.

Front page continuation (72) Inventor Takenori Ishiyama 1-1-1 Shibaura, Minato-ku, Tokyo Inside Toshiba Head Office

Claims (4)

[Claims] 1. A frame which is used to open and close a manhole provided in a facility installed underground such as a pipeline or a tunnel, and which is composed of a frame provided at an opening of the manhole and a lid which is fitted to the frame. A metal lid, wherein at least one display means provided on the frame, and at least one display means provided on the frame side of the fitting portion between the frame and the lid and operating when the frame and the lid are not fitted And a power supply unit that supplies power to the display unit to light or blink the display unit when the switch is operated. 2. A frame which is used to open and close a manhole provided in equipment installed underground such as a pipeline or a tunnel, and which is provided with a frame provided at the opening of the manhole and a lid which fits the frame. In the metal lid, the sound generating means such as at least one speaker provided in the frame and the fitting side of the frame and the lid are provided on the frame side, and operate when the frame and the lid are not fitted. A hazard notification function comprising: at least one switch; and a power supply means for supplying power to the sounding means to generate an alarm sound when the switch is operated. Gold lid. 3. A frame which is used to open and close a manhole provided in equipment installed underground such as a pipeline or a tunnel, and which is provided with a frame provided at the opening of the manhole and a lid which fits with the frame. In the metal lid, at least one display means provided in the frame, at least one sound generating means such as a speaker provided in the frame, and a frame side of a fitting portion between the frame and the lid. And at least one switch that operates when the frame and the lid are not engaged, and by operating the switch, power is supplied to the display means and the sounding means to turn on or blink the display means. A metal cover with a danger notification function, comprising: a power supply unit for generating an alarm sound to the sounding unit. 4. The metal lid with a hazard warning function according to claim 1, wherein the power supply means is configured to supply power from a built-in battery.