JP2006316862A - Safety management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety management system for specifying a worker whose body enters into a dangerous working area and recording and managing the dangerous activity of individual workers to carry out safety education adequate to the activity property of each worker in accordance with the results while preventing the unnecessary stop of a rotary plate provided in a waste carry-in port by identifying whether an object is a human body or not who enters into an area possibly involving the human body. <P>SOLUTION: The safety management system comprises an electromagnetic wave communication tag 10 mounted on the side of a worker and having an antenna portion 18 and an antenna device 17 for interacting with the electromagnetic wave communication tag 10 when the electromagnetic wave communication tag 10 enters into a dangerous working area. When a signal from the electromagnetic wave communication tag is received by the antenna device, a signal S1 is transmitted from an emergency stop circuit 13 to stop the operation of a machine. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a safety management system for preventing a worker working near a mechanical device from being killed or injured.
More specifically, when a part of the worker's body (for example, a hand) enters the area where there is a risk of human body involvement at the garbage entrance at the rear of the garbage truck, the safety of emergency stop of the mechanical device Regarding the management system, in particular, it relates to a safety management system in which an ID tag is attached to a worker's gloves and the history of the worker who has put a hand in the dangerous work area during the trash carrying-in operation is identified and recorded for each worker. .

Conventionally, there are many accidents in which an operator who puts garbage into the garbage entrance at the rear of the garbage truck gets his hands in an area where there is a risk of being caught in a human body and is caught in the rotating plate with his arms.
For this reason, an emergency stop button is installed to stop the operation of the rotating plate that scrapes off dust in preparation for an accident.

However, when the arm of the worker who is performing the input work is caught, the worker cannot move and cannot reach the hand and cannot push the button.
Even if a hand arrives, it is expected that you will be upset and forget to press the emergency stop button.
If there is another worker near the emergency stop button, it is considered that the emergency stop button is immediately pressed, but there is not always another worker near the emergency stop button.

Therefore, in order to suppress the occurrence of catastrophe due to such entrainment, it has been proposed to adopt a method of transmitting an emergency stop signal from a dedicated transmitter carried by the worker or a method of emergency stop by the voice of the worker. (For example, see Patent Document 1).
However, since the emergency stop signal is transmitted after the worker gets involved in the machine and becomes in a dangerous state, safety measures for the worker cannot be said to be sufficient.
This is also true for the case where the emergency stop button is pressed.

  Therefore, when an optical sensor having a light emitting part and a light receiving part is used, and a worker's body blocks a light beam (light beam from the light emitting part to the light receiving part) having an optical path that conflicts with a dangerous work area, the machine is immediately The present applicant examined that a system (see, for example, Patent Document 2) for stopping the operation of the vehicle is applied to a garbage truck.

However, in order to make the worker safer, it is better to install a large number of optical sensors. However, an excessive number of optical sensors are provided, and the rotating plate is stopped by an operation that does not cause any problem for the operator. In some cases, the trash collection workability deteriorates.
Moreover, in a garbage truck, dust etc. adhere to the light emission part and light-receiving part of an optical sensor, and an optical sensor tends to be in a defective state.
Therefore, the present applicant examined a safety management system provided with a mechanism for stopping the operation of the rotating plate when the load applied to the rotating plate becomes larger than a certain level.

JP 2002-73125 A JP 2004-42101 A

However, in the safety management system as described above, when a relatively large and hard object is included in the trash, the human hand is not involved, but the load becomes greater than a certain level, There is a problem that the operation of the rotating plate stops unintentionally and the working efficiency is deteriorated.
In addition, even if it is possible to accurately identify that an object that has entered a region where a human body may be involved is a human body by solving such a problem, it is not possible to identify each worker. Therefore, even if an accident occurs after taking dangerous actions many times, the number of times is not clear, and there is another problem that the frequent dangerous actions are not reflected.

The present invention has been made on the basis of such background technology, and has been made to overcome the above-described problems of the background technology.
That is, the present invention does not unnecessarily stop the rotating plate provided at the garbage carry-in entrance by identifying whether an object that has entered a region where the human body may be caught is a human body. In addition, a worker who has entered his / her human body into the hazardous work area is identified, and the dangerous behavior of each worker is recorded and managed. Based on the results, safety education suitable for the behavioral characteristics of each worker is provided. The object is to provide a safety management system that can be implemented.

  Thus, as a result of earnest research on the background of such problems, the present inventor has found that the above problems can be solved by attaching an ID tag to a glove worn by an operator. The present invention has been completed based on knowledge.

  That is, the present invention includes (1) an electromagnetic wave communication tag attached to a worker side and having an antenna part, and an antenna device that communicates with the electromagnetic wave communication tag when the electromagnetic wave communication tag enters a dangerous work area. When the antenna device receives a signal from the electromagnetic wave communication tag, the signal is transmitted from an emergency stop circuit to stop the operation of the machine.

  Further, the present invention resides in (2) the safety management system according to (1), wherein the antenna device is provided at a garbage carry-in port of a garbage truck.

  According to the present invention, (3), the antenna portion of the antenna device is built in a long safety bar provided at a dust entrance, and the safety bar is disposed on the upper end side or the lower end side of the dust entrance. It exists in the safety management system as described in said (2) provided along the width direction of a collection vehicle.

  Moreover, this invention exists in the safety management system as described in said (1) with which the said electromagnetic wave communication tag was provided in the said operator's side glove.

  Moreover, this invention exists in the safety management system as described in said (1) with which the said antenna apparatus is provided in the machine tool (5).

  Moreover, this invention exists in the safety management system as described in said (1) which is (6) and the said electromagnetic wave communication tag is an ID tag which has an individual identification code.

  The present invention resides in (7) the safety management system according to (6), wherein the ID tag is provided with a memory for holding an identification code.

  Further, the present invention resides in (8) the safety management system according to (7), wherein a recording device for recording the identification code information of the worker who has stopped the emergency stop circuit is provided.

  In addition, as long as the objective of this invention is met, the structure which combined the said (1) to (8) suitably is also employable.

According to the present invention, there is provided an electromagnetic wave communication tag attached to a worker and having an antenna part, and an antenna device that communicates with the electromagnetic wave communication tag when the electromagnetic wave communication tag enters the dangerous work area. When the antenna device receives the signal from the communication tag, the operation of the machine is stopped. Therefore, the operation of the machine is stopped only when an operator enters the dangerous work area.
Therefore, even if an object that does not have an electromagnetic wave communication tag other than the human body enters the dangerous work area, the machine does not stop and work efficiency does not decrease.

  Further, if the electromagnetic wave communication tag is an ID tag having an individual identification code, a worker can be specified by a signal from the ID tag, and the dangerous behavior of each worker can be recorded and managed. Safety education suitable for behavioral characteristics can be implemented.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 shows a garbage truck and a worker included in an embodiment of the safety management system of the present invention.
As shown in the drawing, in order to accommodate the garbage bag 2 in which combustible or non-combustible garbage is enclosed in the garbage truck 1, first, the vehicle is temporarily fixed with the door 3 on the rear side of the vehicle opened.
Then, a worker wearing gloves 5 in the opened substantially rectangular parallelepiped garbage storage box 4 throws in the garbage bag 2.
The thrown-in garbage bag 2 is sent to the inside by the operation of a rotating plate 6 and a pushing plate 7 described later.

FIG. 2 mainly shows the internal structure of the trash storage box 4.
As shown in the drawing, elongate safety bars 8A and 8B are provided along the width direction of the trash storage box 4 on the upper end side and the lower end side of the trash input port of the trash storage box 4.
In the safety bars 8A and 8B, as shown in FIG. 3, a plurality of coiled reader antennas 9 are provided in a straight line at regular intervals.

In addition, a rotating plate 6 is provided in the vicinity of the opening in the trash storage box 4 for entraining the thrown trash bag 2 and pushing it backward.
Above that, there is provided a large pushing plate 7 for reciprocating in the vehicle front-rear direction to push the garbage bag deeper.

Here, the detail of the operation | movement which pushes dust back is demonstrated using FIG.
FIG. 4A shows a state in which trash is put into the trash temporary storage portion 4 a of the trash storage box 4.
At this time, the tip of the rotating plate 6 is located above the rotating shaft, and the tip of the pushing plate 7 is in a state where dust is pushed backward.
When the rotating plate 6 continues to rotate from the state of FIG. 4A, as shown in FIG. 4B, the rotating plate 6 entrains the dust put in the temporary dust storage portion 4a and pushes it backward.
At this time, the pushing plate 7 rotates to the rear side of the vehicle.
When the rotating plate 6 becomes substantially horizontal, the rotating plate 6 temporarily stops rotating at that position, and the pushing plate 7 rotates toward the front of the vehicle. As shown in FIG. Push the trash on the back.
The above is the operation of pushing the garbage backward.

Further, the reader antenna 9 incorporated in the safety bars 8A and 8B shown in FIG. 3 can communicate with the electromagnetic wave communication tag 10 provided on the glove 5 of the worker shown in FIG.
When the electromagnetic wave communication tag 10 enters a dangerous work area where a worker's hand is involved, the distance between the electromagnetic wave communication tag 10 and the reader antenna 9 is reduced, and the reader antenna 9 picks up the electromagnetic wave from the electromagnetic wave communication tag 10. It becomes like this.
When the reader antenna 9 picks up a signal from the electromagnetic wave communication tag 10, the rotating operation of the rotating plate 6 and the rotating operation of the pushing plate 7 are stopped urgently.

Next, the safety management system of this embodiment will be described with reference to the block diagram of FIG.
The electromagnetic wave communication tag 10 and the reader antenna 9 shown in FIG.
Specifically, information about an individual identification code is transmitted from the electromagnetic wave communication tag 10 to the reader antenna 9 by the communication between the reader antenna 9 and the electromagnetic wave communication tag 10.
Here, the electromagnetic wave communication tag 10 is used as an ID tag having an individual identification code.

The ID information received by the reader antenna 9 is sent to the reader circuit 11 and decoded.
Then, the CPU 12 reads the information decoded by the reader circuit 11, operates the emergency stop circuit 13, and transmits a signal S1 for stopping the operation of the machine such as the rotating plate 6 and the pushing plate 7.
The rotating plate 6 and the pushing plate 7 stopped in this manner are pressed by an emergency stop release button 15 provided in the trash storage box 4 so that the CPU 12 reads it and activates the emergency stop release circuit 16. The emergency stop cancellation circuit 16 transmits a signal S2 for reactivating the rotating plate 6 and the pushing plate 7.

Moreover, the individual identification code for each electromagnetic wave communication tag 10 is recorded in the recording device 14 such as a hard disk or a flexible disk in accordance with a command from the CPU 12, and the dangerous behavior of each worker is recorded and managed.
Therefore, it is possible to carry out safety education suitable for the behavioral characteristics of each worker.

Next, details of the internal structure of the antenna device 17 including the reader antenna 9 and the reader circuit 11 and the electromagnetic wave communication tag 10 will be described with reference to FIG.
The electromagnetic wave communication tag 10 is provided with an antenna unit 18 composed of a coil L1. A capacitor C1 is connected in series with the coil L1 to form a resonance circuit.
As a power source of the resonance circuit, an AC power source V1 that can be charged by a radio wave transmitted from the reader antenna 9 is used.
If the electromagnetic wave communication tag 10 approaches the reader antenna 9, a current flows through the coil L2 of the reader antenna 9 due to the change in the magnetic flux of the coil L1, and a signal is generated.

Then, the signal generated in the coil L2 is sent to the CPU 12 through the decoding unit 19.
Upon receiving this signal, the CPU 12 turns on the switch SW2, connects the AC power source V2 and the coil L3, and generates a magnetic flux also from the coil L3.
Then, the coil L1 is affected by this magnetic flux, and the current generated by the coil L1 changes.
This change in current is detected by the decoding unit 20 and a detection signal is transmitted to the control unit 21.

Then, the individual identification code information recorded in the memory 22 connected to the control unit 21 is encoded by the encoding unit 23, and the switch SW1 is continuously turned on / off based on the encoded signal.
Then, the magnetic flux of the coil L1 changes continuously, and this change is received by the coil L2 of the reader antenna 9 and decoded by the decoding unit 19.
Then, the signal from the decoding unit 19 is read by the CPU 12 and an individual identification code is recorded in the recording device 14.

Next, the operation of the safety management system will be described using the flowchart shown in FIG.
First, in step S <b> 1, a search is always performed as to whether or not the electromagnetic wave communication tag 10 exists in the vicinity of the antenna device 17.
That is, if the electromagnetic wave communication tag 10 does not exist in the reception range of the reader antenna 9 in step S2, the process returns to step S1 and the search for the presence of the electromagnetic wave communication tag 10 is continued.
On the other hand, when the electromagnetic wave communication tag 10 exists in the reception range of the reader antenna 9, the process proceeds to step S3.
Note that the operations in steps S1 and S2 are actually performed at the same time, and other than when the electromagnetic wave communication tag 10 exists in the vicinity of the reader antenna 9, that is, while the machine is not in an emergency stop. The search is always performed.

In step S3, the emergency stop circuit 13 is activated, a signal S1 for stopping the operation of the machine is transmitted, a switch existing in the power supply line for operating various machines is turned OFF, and the operation is stopped.
In step S <b> 4, the identification code information of the electromagnetic wave communication tag 10 decoded by the reader circuit 11 having the decoding unit 19 is recorded in the recording device 14 using the CPU 12.
In step S5, when the emergency stop release button 15 is pressed, the emergency stop state is released, and the process returns to step S1.

In the embodiment described above, the electromagnetic wave communication tag 10 attached to the glove 5 worn by the worker and having the antenna portion 18 and the antenna that communicates with the electromagnetic wave communication tag 10 when the electromagnetic wave communication tag 10 enters the dangerous work area. Device 17 is provided, and when the antenna device 17 receives a signal from the electromagnetic wave communication tag 10, the operation of the machine is stopped. Therefore, the operation of the machine is performed only when an operator enters the dangerous work area. Stops.
Therefore, even if an object other than a human body enters the dangerous work area, the machine does not stop and work efficiency does not decrease.

  Further, since the electromagnetic wave communication tag 10 is an ID tag having an individual identification code, a worker can be specified by a signal from the ID tag, and the number of dangerous behaviors of each worker can be recorded and managed. Safety education suitable for the behavioral characteristics of each employee can be implemented.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various other modifications are possible without departing from the essence thereof.
For example, in the above-described embodiment, the example in which the electromagnetic wave communication tag 10 is attached to the glove 5 has been described, but it may be attached to clothing.
More specifically, it is an effective method to attach to the cuffs of the upper garment.
Moreover, you may attach to a worker's wrist via a band.

Further, in the above-described embodiment, as an example of stopping the operation of the machine, the garbage collection vehicle has been described as an example. However, various machines having a dangerous work area in which human bodies are concerned may be involved, even if the vehicle is not a garbage collection vehicle. Can be used.
For example, the present invention may be applied to a machine tool that performs machining such as cutting or pressing.

FIG. 1 is an explanatory diagram showing a garbage truck and a worker included in an embodiment of the safety management system of the present invention. FIG. 2 is an explanatory view showing the internal structure of the trash storage box. FIG. 3 is an explanatory view showing a reader antenna built in a safety bar provided at a garbage carry-in port of the garbage container. FIG. 4 is an explanatory view showing a state in which trash is put into the trash temporary storage portion of the trash storage box. (A) has shown the state into which the garbage was thrown into the garbage temporary storage part of a garbage storage box. (B) shows a state in which the rotating plate entrains the dust put into the temporary dust storage portion and pushes it backward. (C) has shown the state which pushed the dust on a rotating plate back. FIG. 5 is a block diagram showing an embodiment of the safety management system of the present invention. FIG. 6 is an explanatory diagram showing details of the internal structure of an antenna device including a reader antenna and a reader circuit and an electromagnetic wave communication tag. FIG. 7 is an explanatory diagram showing an operation flow of one embodiment of the safety management system of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Garbage truck 2 Garbage bag 3 Door 4 Garbage storage box 4a Temporary garbage storage part 5 Gloves 6 Rotating plate 7 Pushing plate 8A, 8B Safety bar 9 Reader antenna 10 Electromagnetic wave communication tag 11 Reader circuit 12 CPU
DESCRIPTION OF SYMBOLS 13 Emergency stop circuit 14 Recording apparatus 15 Emergency stop cancellation | release button 16 Emergency stop cancellation circuit 17 Antenna apparatus 18 Antenna part 19 Decoding part 20 Decoding part 21 Control part 22 Memory 23 Encoding part C1 Capacitor L1, L2, L3 Coil S1, S2 signal SW1, SW2 switch V1, V2 AC power supply

Claims (8)

An electromagnetic wave communication tag attached to the worker side and having an antenna part;
An antenna device that communicates with the electromagnetic wave communication tag when the electromagnetic wave communication tag enters the dangerous work area;
Have
When the antenna device receives a signal from the electromagnetic wave communication tag, the safety management system is characterized by transmitting a signal from an emergency stop circuit and stopping the operation of the machine.   The safety management system according to claim 1, wherein the antenna device is provided at a garbage carry-in port of a garbage truck.   The antenna unit of the antenna device is built in a long safety bar provided at the garbage entrance, and the safety bar is provided on the upper end side or the lower end side of the garbage entrance along the width direction of the garbage truck. The safety management system according to claim 2, wherein the safety management system is provided.   The safety management system according to claim 1, wherein the electromagnetic wave communication tag is provided on a glove on the worker side.   The safety management system according to claim 1, wherein the antenna device is provided in a machine tool.   The safety management system according to claim 1, wherein the electromagnetic wave communication tag is an ID tag having an individual identification code.   The safety management system according to claim 6, wherein the ID tag is provided with a memory for holding an identification code.   The safety management system according to claim 7, further comprising a recording device that records identification code information of the worker who has stopped the emergency stop circuit.

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