JP3095588B2 - Vehicle derailment detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a derailment detecting device for automatically detecting wheel derailment of an industrial transport vehicle traveling on rails.

[0002]

2. Description of the Related Art As an industrial transport vehicle, for example, an unmanned operation is performed at a speed of 20 to 25 km / h on a track installed in a factory premises, and conveyed articles such as manufactured parts and assembled parts are transported between places. There is something.

In such a transport vehicle, when transporting a load having a large load, all the wheels must be in a state of being on the rail. However, there are obstacles on the rail, When the vehicle travels on a distorted portion, the wheels may come off the rails and the truck may derail, and the vehicle, the sleepers, and the like may be damaged, resulting in a dangerous state.

Conventionally, as a device for detecting the derailment of such a bogie, there is a derailment detecting device using a bar and a contact switch passed between wheels as shown in FIG. In FIG. 3, reference numeral 1 denotes a bogie having wheels 3 running on rails 2;
A derailment detection mechanism 5 is supported and fixed to the distal end portion via a support member 4. This derailment detection mechanism 5 is shown in FIG.
As shown in (b), a movable bar 6 is provided so as to be movable in the longitudinal direction of the support member 4, and a fixed bar 7 is attached to the tip of the support member 4, and the movable bar 6 is mounted on the fixed bar 7.
Are elastically supported via a spring 8. A switch 9 is provided between the movable bar 6 and the fixed bar 7 and is normally closed by contact with the fixed bar 7.

In the vehicle derailment detecting device having such a configuration, the movable bar 6 of the derailment detecting mechanism 5 is elastically supported on the fixed bar 7 by the spring 8 in a normal state.
The switch 9 is closed by being pressed by the movable bar 6.

[0006] Further, at the time of derailment, the wheel 3 comes off the rail 2 and the carriage 1 falls below the rail, so that the movable bar 6 comes into contact with the rail 2. Then, the movable bar 6 is pushed up by the rail 2 and moves along the support member 4 in a direction away from the fixed bar 7, so that the switch 9 is opened. Therefore,
By inputting the opening signal of the switch 9 to a monitoring device (not shown), the derailment of the carriage 1 is detected and the emergency stop of the vehicle is performed.

[0007]

However, in the vehicle derailment detecting device having such a structure, the movable bar 6 is fixed to the fixed bar 7.
Is elastically supported by a spring 8 and a derailment detection mechanism that detects derailment by opening the switch 9 when the movable bar 6 is pushed up by the rail 2 during derailment. May cause damage.

Therefore, in order to avoid malfunction or breakage of the derailment detection mechanism, it is conceivable that the bar itself is made of a material having a heavy weight and high mechanical strength. There is a problem that the rails are damaged due to heavy weight and heavy contact with the rails during derailment.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there is no malfunction due to vibration of a bogie even if the entire bogie is not heavy, and derailment of one wheel without damaging rails, and the bogie itself. It is an object of the present invention to provide a vehicle derailment detection device capable of detecting derailment of a vehicle and derailment between trolleys.

[0010]

According to the present invention, in order to achieve the above object, a derailment detecting device is constituted by the following means. (1) In a vehicle running on a rail, a gap sensor that is mounted on a bearing portion of each wheel of a bogie of the vehicle with a detection surface facing the rail, and electrically measures a distance between the rail and The distance signal measured by each of these gap sensors is input and the gap value obtained by signal processing the distance signal is compared between the wheels to determine whether the difference is greater than a set level, and the gap between the wheels is determined. A control device for detecting derailment when the value is determined to be larger than the set level and emergency-stopping the vehicle. (2) In a vehicle running on a rail, a gap sensor is mounted on each of the bearings of the wheels of a plurality of bogies of the vehicle with the detection surface facing the rail and electrically measures a distance between the rail and the rail. And a distance value measured by each of these gap sensors is input, and a gap value obtained by performing signal processing on the distance signal is compared between the coaxial wheels to determine whether the difference is larger than a set level. Determining means for determining whether the difference in gap value between wheels of the same bogie is greater than a set level when the difference in gap value between coaxial wheels is smaller than a set level. Determining means for determining, when the difference between the gap values between the wheels of the same bogie is smaller than the set level, whether the difference between the gap values between the wheels and another bogie is larger than the set level by the second determining means; And third determination means for constant, the first
If the difference between the gap values is determined to be larger than the set level by any of the determination means to the third determination means, a derailment detection means for detecting derailment and emergency stopping the vehicle.

[0011]

In the derailment detecting device having the configuration as described in the above (1), the distance between the rail and the rail is electrically measured by a gap sensor attached to the bearing of each wheel of the bogie, and the distance is measured. The gap value obtained by signal processing of the distance signal is compared between the wheels to determine whether the difference is greater than a set level. If the gap value between the wheels is greater than the set level, derailment is detected. Emergency stop of the vehicle, so it is possible to electrically detect wheel derailment in a non-contact manner, avoiding malfunction due to bogie vibration and damage to rails without increasing the weight of the entire bogie. can do.

Further, in the derailment detecting device having the structure as described in the above (2), the same operation and effect as in the above (1) can be obtained, and one wheel is determined by the first to third determining means. Derailment, derailment of one truck itself, and derailment of wheels between different trucks can be detected, and damage to the vehicle due to derailment can be prevented to a minimum.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an entire vehicle to which a derailment detection device according to the present invention is applied. In FIG. 1, reference numeral 11 denotes a vehicle.
13 are provided respectively, and wheels 14 running on rails 15 are respectively provided at the front and rear portions of both trucks 12 and 13.
have.

In the vehicle having such a configuration, each truck 1
Each of the support members 16 is attached to a bearing portion of the wheel 14 provided in each of the wheels 2 and 13, and a gap sensor 17 is provided at a tip end of each of the support members 16 so that a detection surface is opposed to the rail 15 surface. A distance detection signal between the vehicle and the rail 15 detected by the vehicle 17 is input to a control device 18 provided in the vehicle. In this case, any sensor can be used as each gap sensor 17 as long as it can electrically measure the distance from the detection surface to the rail 15 surface. Here, a sensor that extracts a voltage or current signal as an analog signal is used. Have been.

FIG. 2 shows an example of the configuration of an internal circuit of the control device 18 to which the distance detection signal detected by each of the above-described gap sensors 17 is input. In FIG. 2, reference numeral 19 denotes a signal processing circuit to which a detection signal of each of the gap sensors 17 is input. The signal processing circuit 19 converts the signal into a numerical signal in accordance with the magnitude of the detection signal and outputs the signal. is there. In this case, for convenience of explanation, the front and rear wheel side gap sensors 17 of the front bogie 12 are A, B,
C and D, and the front and rear wheel-side gap sensors 17 of the rear truck 13 are expressed as E, F, G and H.

Reference numeral 20 denotes a first determination circuit to which the detection signals of the respective sensors quantified by the signal processing circuit 19 are input, respectively. The first determination circuit 20 is a distance signal detected by the sensors A and B. A determination element 20a for determining whether the difference is greater than a set level, a determination element 20b for comparing distance signals detected by the sensors C and D to determine whether the difference is greater than a set level, Sensor E,
A determination element 20c for comparing the distance signals detected by F to determine whether the difference is greater than a set level; comparing the distance signals detected by the sensors G and H to determine whether the difference is greater than a set level; Is provided.

Reference numeral 21 denotes a second determination circuit,
The determination circuit 21 compares the distance signals detected by the sensors A and C and determines whether or not the difference is greater than a set level. The determination circuit 21 compares the distance signals detected by the sensors F and G to determine the difference. A determination element 21b for determining whether the difference is larger than the set level is provided.

Further, reference numeral 22 denotes a third determination circuit which compares the distance signals detected by the sensors A and E to determine whether the difference is larger than a set level. It is composed of

The set level used in each of the above-described determination circuits is determined based on the height of the rail and the wheel diameter. On the other hand, reference numeral 23 denotes each determination element 20 of the first determination circuit 20.
a to 20d, each determination element 21a of the second determination circuit 21,
A derailment detection circuit that detects derailment when the difference between the distance signals is larger than the set level by the first determination circuit 21b and the third determination circuit 22, and stops the vehicle when the derailment detection circuit 23 detects derailment, etc. The safety processing circuit 25 executes an appropriate process of the sensor F,
When it is determined that the difference between the distance signals detected in G is smaller than the set level, the normality confirmation circuit confirms that the vehicle is running normally and continues the next determination operation.

Next, the operation of the vehicle derailment detecting device configured as described above will be described. When the signals quantified by the signal processing circuit 19 of the control device 18 from each of the sensors A to H are input to the first determination circuit 20, the determination element 20a
In ２０20d, it is determined whether or not the difference between the distance signals detected by the sensors A and B, C and D, E and F, and G and H is greater than a set level. Is larger than the set level, the derailment detection circuit 23 detects derailment of only one wheel.

The determination element 20 of the first determination circuit 20
If it is determined that the difference between the distance signals detected by the sensors is smaller than the set level for any of the displacements a to 20d, the process proceeds to the second determination circuit 21, and the determination elements 21a and 21b determine the sensors A and C and E. It is determined whether the difference between the distance signals detected by G and G is greater than a set level. If it is determined that the difference is greater than the set level, the derailment detection circuit 23 detects derailment between axles.

Further, the judgment element 2 of the second judgment circuit 21
If it is determined that the difference between the distance signals detected by the respective sensors is smaller than the set level for any of the displacements 1a and 21b, the process proceeds to a determination element 22, and the difference between the distance signals detected by the sensors A and E is set to the set level. The derailment detection circuit 23 determines whether it is greater than the set level or not.
As a result, derailment of each carriage is detected.

If the derailment is detected by the derailment detection circuit 23 at any of the above stages, the safety processing circuit 23
Thus, complete processing such as stopping the running of the vehicle is performed. Also,
Normal check circuit 2 when derailment is not detected at all stages
After confirming that the state is normal according to step 5, the same processing as described above is repeated.

As described above, in the present embodiment, attention is paid to the fact that the distance between the derailed wheel and the rail changes at the time of derailment, and the detection surfaces are formed on all the bearings of the wheels 14 of the bogies 12 and 13 of the vehicle 11. The gap sensors 17 are respectively attached to the rail surfaces, and distance signals between the sensor detection surfaces detected by the respective gap sensors 17 and the rails are input to the controller 18. Then, in the control device 18, the gap value obtained by digitizing the distance signal detected by each of the gap sensors 17 is determined by the first determination circuit 2.
0, the second determination circuit 21 and the third determination circuit 22 compare the coaxial wheels, the same bogie wheels, and the different bogie wheels, respectively. If the magnitude of any difference is larger than the set level, When it is determined, the derailment detection circuit 23 detects the derailment and the safety processing circuit 24 stops the vehicle in an emergency.

Therefore, unlike the conventional derailment detection mechanism using a derailment detection mechanism using a bar and a contact switch passed between wheels, the derailment can be detected in a non-contact manner, so that the bogie can be vibrated without increasing the weight of the entire bogie. Malfunction and damage to the rail can be avoided. Also, derailment of one wheel, derailment of one truck itself, and derailment between trucks can be detected, so that damage to the vehicle can be prevented to a minimum.

[0026]

As described above, according to the present invention, even if the entire truck is not heavy, there is no malfunction due to the vibration of the truck and derailment of one wheel without damaging the rails.
A vehicle derailment detection device capable of detecting derailment of a single truck itself and derailment between trucks can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire vehicle to which a derailment detection device according to the present invention is applied.

FIG. 2 is a functional block diagram of a control device in one embodiment of the derailment detection device according to the present invention.

FIG. 3 is a schematic configuration diagram showing a conventional derailment detection device.

FIG. 4 is a configuration explanatory view showing details of the derailment detection device.

[Explanation of symbols]

11 vehicle, 12, 13 truck, 14 wheel, 15 rail, 16 support member, 17 gap sensor, 18
Control device, 19: signal processing circuit, 20: first determination circuit, 21: second determination circuit, 22: third determination circuit, 2
3: Derailment detection circuit, 24: Safety processing circuit, 25: Normality confirmation circuit.

Claims (2)

(57) [Claims] In a vehicle running on a rail, a gap sensor is mounted on a bearing portion of each wheel of a bogie of the vehicle so that a detection surface faces the rail, and a gap sensor electrically measures a distance from the rail. The distance signal measured by each of these gap sensors is input, and the gap value obtained by signal processing the distance signal is compared between the wheels to determine whether or not the difference is larger than a set level. A derailment detection device that detects derailment when it is determined that the gap value is larger than a set level and emergency-stops the vehicle. 2. In a vehicle running on a rail, a detection surface is attached to a bearing portion of each wheel of a plurality of bogies of the vehicle with the detection surface facing the rail, and a distance between the rail and the rail is electrically measured. A gap sensor and a distance signal measured by each of the gap sensors are input, and a gap value obtained by performing signal processing on the distance signal is compared between the coaxial wheels to determine whether the difference is greater than a set level. A first determination unit configured to determine whether a difference between gap values between wheels of the same bogie is greater than a set level when a difference between gap values between coaxial wheels is smaller than a set level; And if the difference between the gap values between the wheels of the same bogie is smaller than the set level, is the difference between the gap values between the wheels with another bogie larger than the set level? Third determining means for determining whether or not
Derailment detecting means for detecting derailment and emergency stopping the vehicle when it is determined that the gap value difference is larger than a set level by any of the first to third determining means. Characteristic vehicle derailment detection device.