JP2751659B2 - Alarm mat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm mat which is used, for example, in a factory or a construction work site, etc., which is used in front of a danger point of access. The present invention relates to an alarm mat capable of preventing entry into the dangerous place by issuing a warning.

[0002]

2. Description of the Related Art For example, in an automobile assembly plant, a conveyor line for suspending a vehicle body and the like and transporting it along a horizontal elevated track is provided, and a suspended object is provided between the conveyor line and the ground. Safety nets are provided to prevent falling onto the ground and to provide a foothold for workers during maintenance and inspection. However, such a conveyor line is generally provided with a lifting lifter which is used when a suspended object needs to be lowered to the ground during transportation, and a horizontal track is provided with a track bent downward in the middle thereof. Due to the provision of the portion, the safety net is interrupted at the lifting lifter and the bending track portion, and an opening is formed in which the safety handrail cannot be juxtaposed. If a worker walking on the safety net accidentally steps into the opening, a serious accident may occur, which is very dangerous.

Conventionally, however, a mat having a built-in pressure-sensitive sensor is laid inside the mat in front of the dangerous opening as described above, and when the operator steps on the mat, the pressure-sensitive sensor detects the step. In response to this detection signal, an external buzzer installed in a suitable place is caused to sound, so that the worker is notified of the opening as a dangerous place.

[0004]

A conventional mat with a built-in pressure-sensitive sensor requires a power supply, electric wiring, and other electric-related equipment, which complicates the equipment and reduces the production and maintenance costs. There was a problem that it was expensive. Therefore, the problem to be solved by the present invention is to provide an alarm mat that does not require any power supply.

[0005]

Means for Solving the Problems To solve the above problems,
Means will be described with reference to FIGS. 1 and 2 corresponding to the embodiment.
To clarify, the alarm mat of the present invention, on a flat substrate 1 ,
A hemispherical shape that forms a cavity inside and bulges to the top side
Made of a flexible sheet material integrally formed with a large number of bulging portions 3
While covering the cover sheet 2, each bulging portion 3 and the base
The hemispherical space 4 formed between the material 1 and the
A bellows-like dense body that can expand and contract vertically by forming a possible air chamber 5
Each of the bulging portions 3 and each of the closed cylindrical bodies is accommodated in a closed cylindrical body 6.
6 are provided with air circulation holes 7 and 8, respectively, and each closed cylindrical body is provided.
6, a whistle 9 which emits a sound by air flowing when the air chamber 5 of the closed cylindrical body 6 is deformed by stepping on the bulging portion 3 of the cover sheet 2 is provided. .

In this alarm mat, the whistle 9 is
The sound may be emitted only when the internal air flows out of the air circulation hole due to the compression deformation of the air chamber 5, or the compressed air chamber 5 expands and deforms to the original shape due to elasticity. The sound may be emitted only when
Further, a sound may be emitted at both the outflow and the inflow of air.

[0007]

In the alarm mat of the present invention, human Kabashi
When stepping on the bulging portion 3 of the seat 2, the bulging portion 3
The air chamber 5 of the closed cylindrical body 6 housed in the portion is compressed and deformed, and the air in the air chamber 5 is discharged from the air circulation hole 8 to the outside.
Outflow into the cavity 4 and from inside the cavity 4 through the air circulation holes 7
And flows out of the bulging portion 3 . Also, when the stepped foot is removed from the bulging portion 3 of the cover sheet, the foot is contracted and the dense
When the air chamber 5 of the closed cylindrical body 6 expands and deforms due to the elastic restoring force , the outside air flows from the air circulation hole 7 of the bulging portion 3 into the cavity 4.
The air flows from the air circulation hole 8 of the closed cylindrical body 6 into the air chamber 5.
Enter. Thus, the whistle 9 emits a sound due to the air flowing out or in through the air flow holes 8 of the closed cylindrical body 6 .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. First, FIGS. 1 and 2 show an alarm mat according to an embodiment of the present invention in a plan view and an enlarged sectional view of a main part.
In these drawings, reference numeral 1 denotes a base material made of, for example, a plywood, on which a cover sheet 2 made of a rubber sheet material or a flexible synthetic resin sheet material is adhered. A large number of hemispherical bulging portions 3 bulging toward the upper surface of the sheet with a hollow inside are integrally formed, and a hemispherical space formed between each bulging portion 3 and the base material 1 is formed. The place 4 accommodates a bellows-like closed cylindrical body 6 which forms an elastically deformable air chamber 5 therein and which can expand and contract vertically.

Each of the bulging portions 3 is provided with an air flow hole 7 communicating with the inside and outside thereof. The closed cylindrical body 6 housed in the bulging portion 3 is a bellows structure formed of a relatively hard synthetic resin material, and is closed at both upper and lower ends. An air flow hole 8 for inflow and outflow of air into the air chamber is provided, and a whistle 9 that emits sound by air flowing when the air chamber 5 expands and contracts is attached to the air flow hole 8. The whistle 9 emits a sound both when the air in the air chamber 5 flows out and when outside air flows in.

The cover sheet 2 is adhered to the substrate 1 with an adhesive. A shallow concave portion 10 is provided on the upper surface of the substrate 1 forming the hemispherical space 4, and the closed cylindrical body 6 is fixed to the concave portion 10.

For example, when the alarm mat having the above-described configuration is laid on the front side of a dangerous access point in a factory,
An operator or the like steps on the cover sheet 2 of the mat and contracts and deforms the closed cylindrical body 6 through the bulging portion 3 by the stepping force F, so that the air in the air chamber 5 flows out of the air circulation hole 8. Then, the outflow air causes the whistle 9 to emit a sound, and warns that the end is a dangerous place.

In the alarm mat of each embodiment described above, a fluorescent paint or a paint of a color different from the surrounding color is applied to the entire surface of the cover sheet 2 or the portion of the bulging portion 3. By wearing it, it is possible to visually confirm safety at a dangerous place. In particular, when a fluorescent paint is applied, it is effective when used at night or the like.

[0017]

According to the alarm mat of the present invention, no power supply is required, and therefore, control equipment, wiring and other electric-related equipment are not required. There is a special effect that the cost is very low.

In particular, according to the present invention, the cover sheet
Using flexible sheet material as it is and applying it on the substrate
Instead, the interior is hollowed out in a flexible sheet material.
A large number of hemispherical bulges that bulge to the top side
Cover sheet integrally formed on the base material,
Between each bulge of the cover sheet and the base material, a tight
Since it forms a space for storing the closed cylindrical body,
Just put the bar sheet on the base material and the closed cylindrical
A large number of voids of a given size necessary to expand and contract
The alarm mat is easy and easy to assemble,
Very suitable for mass production. Also, a swelling part is added to the sheet material.
Since they are integrally formed in advance, the pin between each bulging portion is formed.
Switch can be made as small as possible, and
Can form many of the bulging portion by Bashi door, the detection unit, immediately
The sound part of the horn is arranged in honey over the whole area of the mat.
To use the entire area of the alarm mat effectively.
Can be used. In addition, for cover sheet material
As the swelling part is integrally formed in advance, as a sheet material
Is a thick and durable sheet if it has flexibility
Material can be used, and workers can be used in factories and work sites.
Can be broken even when stepping on the bulge of the cover sheet with work shoes, etc.
It is hard to lose and can be used for a long time. Furthermore, the said space
Is the sealed tubular body stored in the bellows shape?
Can perform sufficient elastic deformation and sufficient vertical expansion and contraction
To make the whistle sound effectively.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base material 2 cover sheet 3 bulging portion 4 void 5 air chamber 6 bellows-shaped closed cylindrical body 7 air flow hole 8 air flow hole 9 whistle

Claims (1)

(57) [Claims] 1. A cavity is formed on a flat base material.
A large number of hemispherical bulges that bulge to the top side
Cover sheet made of flexible sheet material
With a hemisphere formed between each bulge and the substrate
An elastically deformable air chamber is formed in the
A retractable bellows-like closed cylindrical body is housed, and
Each closed cylindrical body is provided with an air flow hole,
Step on the bulge of the cover sheet into the air flow hole of the cylindrical body
An alarm mat equipped with a whistle that emits a sound by air flowing when the air chamber of the closed cylindrical body is deformed.