JP3238618U - approach warning system - Google Patents

Abstract

The present invention provides an approach warning system that can reliably detect an approaching vehicle and does not require complicated adjustments.
SOLUTION: An entry alarm system is mounted on a fence 3 and a road cone 4 that partition a work site L, and detects the overturning of the fence 3 and the road cone 4 and outputs a movement signal 2a. A base unit 1 that receives a signal 2a and outputs an alarm is provided.
[Selection drawing] Fig. 8

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an approach warning system, and more particularly to an approach warning system that can be effectively used for purposes such as effectively protecting workers at work sites such as road construction from entering vehicles.

Patent Document 1 discloses an approach warning system in which the speed of a vehicle approaching at a predetermined distance from a work site is detected by a Doppler radar, and a worker is warned when the detected vehicle speed exceeds a set speed. A system is disclosed (above, prior art 1).

Further, in Patent Document 2, an object detection device having a light projecting part and a light receiving part is attached to each top of a plurality of load cones that partition a work site, and light beams projected and received between the load cones are blocked. There is disclosed an approach warning system that issues a warning assuming that a vehicle has entered a vehicle at a time (the above, prior art 2).

JP 2018-55286 JP 2020-66869

However, in the prior art 1, there is a problem that the detection range is limited and vehicles approaching at a speed lower than the set speed cannot be detected. On the other hand, in the conventional technique 2, there is a problem that it takes time to adjust light emission and reception between the load cones.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an approach warning system that can reliably detect an entering vehicle or an intruder and that does not require complicated adjustments.

In order to achieve the above object, in the first idea, the partition member (3, 4) that partitions the work site (L) is mounted, and the excessive movement of the partition member (3, 4) is detected and moved. It comprises movement detection means (2) for outputting a signal (2a) and alarm means (1) for receiving the movement signal (2a) and outputting an alarm.

According to the first idea, by detecting excessive movement of the partitioning member that partitions the work site, it is possible to reliably detect the entry of even a low-speed vehicle or an intruder and issue an alarm. . In addition, as compared with the conventional Doppler radar or the object detection device having a light projecting part and a light receiving part, complicated adjustments are not required.

In the second invention, the partitioning member is a load cone (4) and/or a fence (3) partitioning the work site.

According to the second device, the overturning of the road cone or fence when a vehicle or person enters is detected as excessive movement, so the entry of the vehicle or person can be detected more reliably.

In the third device, the acceleration detection means (211) is used as the movement detection means, and the acceleration detection means (211) detects the acceleration of the road cone (4) and/or the fence (3) at the time of overturning. , outputs the movement signal (2a) as excessive movement.

According to the third invention, it is possible to detect the acceleration of the load cone and/or the fence at the time of overturning, thereby more reliably detecting the entry of a vehicle or a person into the work site.

In the fourth device, the movement signal (2a) of the movement detection means (2) is sent to the warning means (1) by radio.

According to the fourth idea, there is no need for wiring between the movement detection means and the alarm means which are installed separately.

In the fifth device, the housing (21) of the movement detection means (2) is provided with attachments (22, 23) capable of detachably mounting the movement detection means (2) to the partitioning members (3, 4). prepare.

According to the fifth idea, the movement detection means can be easily installed on the partition member.

In the sixth invention, the warning means (1) is provided with a suction tool (122) capable of detachably fixing the warning means (1) to an object by suction.

According to the sixth device, the warning means can be easily installed on a fixed object or the like.

In the seventh idea, the attraction tool (122) is a magnetic attraction tool.

According to the seventh device, the warning means can be easily installed on a metal object such as the body of a work vehicle.

The symbols in parentheses above refer to the corresponding relationship with specific means described in the embodiments described later.

As described above, according to the approach warning system of the present invention, it is possible to reliably detect an approaching vehicle or an intruder, and troublesome adjustments are not required.

1 is a block diagram showing the configuration of an entry warning system; FIG. It is a perspective view which shows the main body and alarm device of a main|base station. It is an enlarged front view of the alarm installed by suction. 4 is an enlarged front view of a child device; FIG. It is a block diagram which shows the structure of a child device. It is a perspective view which shows the state which mounted|wore the fence with the child device. FIG. 4 is a perspective view showing a state in which the child device is attached to the load cone; 1 is a conceptual diagram of a work site provided with an approach warning system; FIG.

The embodiments described below are merely examples, and various design improvements made by those skilled in the art are also included in the scope of the present invention without departing from the gist of the present invention.

As shown in FIG. 1, the approach warning system is composed of one base unit 1 as warning means and one or more (in this embodiment, more than one) slave units 2 as movement detection means. The main unit 1 is composed of a rectangular main body 11 (FIG. 2) containing a power supply circuit 111, a receiving circuit 112, a processing circuit 113, an output circuit 114, etc., and an alarm device 12 connected to the main body 11 by a cable 13. It is Power is supplied to the power supply circuit 111 in the main body 11 from an external power supply (not shown) for road construction or the like.

An enlarged front view of the alarm 12 is shown in FIG. The alarm device 12 has a base 121 made of a long angle material, and magnetic adsorption pads 122 are provided at both ends of the base 121, so that the base 121 can be detachably attached to a metal plate. there is It should be noted that the attraction tool 122 is not limited to magnetism.

A warning horn 123 and two warning lights 124 are provided on the base 121 from one longitudinal end. When the receiving circuit 112 receives a movement signal 2a, which will be described later, from the handset 2, the movement signal 2a is output to the alarm device 12 via the processing circuit 113 and the output circuit 114, and the warning horn 123 sounds for a predetermined time. At the same time, the warning light 124 lights up.

FIG. 4 shows a front view of the handset 2. As shown in FIG. The handset 2 has a rectangular housing 21, and as shown in FIG. A battery is provided in the power supply circuit 213 . The acceleration detection circuit 211 has a three-dimensional position sensor, detects acceleration from changes in the position signal of the position sensor, and outputs a movement signal 2a when the acceleration exceeds a set value. The mobile signal 2 a is wirelessly transmitted to the base unit 1 through the transmission circuit 212 . An acceleration sensor may be used instead of the position sensor to directly detect the acceleration.

If a clip 22 is provided on the rear surface of the housing 21 of the handset 2 as a mounting tool as shown in FIG. be able to. Further, if a ring 23 is provided on the rear surface of the housing 21 as a fitting as shown in FIG. Can be worn.

FIG. 8 shows an example in which the approach warning system described above is installed at a road construction work site. In FIG. 8, a work site L around a manhole M on one side of the road is partitioned by road cones 4 and fences 3 as partitioning members, or ropes (not shown) connecting them. The handset 2 is mounted and arranged on each of the load cone 4 and the fence 3 at the position. The main unit 11 of the main unit 1 is placed at a position near the worker H in the work site L, and the alarm device 12 connected thereto is attached to the metal body of the work vehicle V parked near the worker H. Adsorption installed. In this embodiment, the handset 2 is also installed on the fence 3 installed on the opposite lane side.

As shown in FIG. 8, a vehicle R approaches the work site L equipped with such an approach warning system and directly contacts the fence 3 and the road cone 4 that partition the work site L, or directly contacts the fence 3 and the road cone 4. When the rope that connects 4 is touched and pulled, the fence 3 and the road cone 4 overturn. When the cordless handset 2 is attached to the overturned fence 3 or road cone 4, the acceleration detection circuit 211 detects a predetermined acceleration or more due to overturning and transmits the movement signal 2a. When the movement signal 2a is received by the receiving circuit 112 of the base unit 1, the warning horn 123 of the alarm device 12 installed on the work vehicle V near the worker H sounds and the warning light 124 lights up, indicating that the work is started. Report the danger to employee H and urge him to evacuate to a safe place.

As shown in FIG. 8, if fences 3 and road cones 4 that partition the work site L are connected to each other with ropes and installed on the opposite lane, and the slave unit 2 is attached to one of them, It is also possible to reliably and in advance prevent entry of vehicles from outside.

According to the present invention, since the fence 3 and the load cone 4 are connected to each other by the ropes that partition the work site L, the vehicle R does not come into direct contact with the fence 3 or the like on which the handset 2 is provided, and the inside of the work site L can be reached. Even if an attempt is made to enter the vehicle R, the fence 3 and the road cone 4 on which the handset 2 is mounted are overturned by crossing the rope, coming into contact with it and pulling it, and the entry of the vehicle R is surely detected. At this time, even if the speed of the vehicle R is slow, the vehicle entry can be reliably detected because the acceleration when the fence 3 or the like falls is detected.

Furthermore, according to the present invention, by simply attaching the slave unit 2 to the fence 3 or the road cone 4 with the clip 22 or the ring 23, the slave unit 2 can be installed in the work site L without complicated adjustment or troublesome mounting work. The entry of the vehicle R can be reliably detected to protect the worker.

In the above embodiment, an example is shown in which the entry warning system of the present invention is used to warn the entry of a vehicle into the work site and prompt workers to evacuate to a safe place. The entry warning system of the present invention can also be used to warn people of entry into a storage area or the like to prevent entry.

REFERENCE SIGNS LIST 1 parent device (alarm means), 11 main body, 12 alarm device, 122 suction device, 2 slave device (movement detection means), 2a movement signal, 21 housing, 211 acceleration detection circuit, 22 ... Clip (equipment), 23... Ring (equipment), 3... Fence (partitioning member), 4... Load cone (partitioning member).

Claims (7)

An entry alarm system comprising movement detection means mounted on a partition member for partitioning a work site and detecting excessive movement of the partition member and outputting a movement signal, and alarm means receiving the movement signal and outputting an alarm. . 2. The approach warning system according to claim 1, wherein the partition member is a road cone and/or a fence partitioning the work site. 2. The approach according to claim 1, wherein acceleration detection means is used as said movement detection means, and said acceleration detection means detects acceleration when said road cone and/or fence falls, and outputs said movement signal as excessive movement. alarm system. 2. An approach warning system according to claim 1, wherein the movement signal of said movement detection means is sent to said warning means by radio. 2. The entry alarm system according to claim 1, wherein the housing of said movement detection means is provided with a mounting tool capable of detachably mounting said movement detection means to said partition member. 2. The approach warning system according to claim 1, wherein said warning means is provided with a suction tool capable of detachably fixing said warning means to an object by suction. 7. The approach warning system according to claim 6, wherein the attracting device is a magnetic attracting device.

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