JPH064367B2 - Method and apparatus for detecting horizontal tire puncture - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tire puncture detection method and device for a horizontal wheel (guide / stable wheel) in a monorail vehicle or the like having a pneumatic tire.

[Background of the Invention]

For example, in track vehicles with pneumatic tires such as monorail vehicles, tire troubles such as tire punctures are prevented, safe driving is maintained, and the life of the tire is maintained for a long time. Need to be discovered and dealt with. As the detection method, a method such as mounting a detector such as a pressure switch on the vehicle itself to directly detect it, or installing a ground facility to stop the vehicle at that location,
Alternatively, there is a method to detect and judge the phenomenon that occurs when the internal pressure drops when passing, but the latter method of installing ground equipment is far more total than installing a detector on each tire. There are few, and it is very advantageous in terms of equipment cost and maintenance.

An example thereof will be described below with reference to the drawings. FIG. 1 is an array diagram of a track girder and wheels for a monorail vehicle. In FIG. 1, 1 is a track girder, 2, 2'is a running tire, 3, 3'is a guiding pneumatic tire, 4, 4'is a stabilizing pneumatic tire, 5,
Reference numeral 5'denotes a guiding solid tire, and reference numerals 6 and 6'denotes a stabilizing solid tire. The guiding pneumatic tires 3 and 3'and the guiding solid tires 5 and 5'are arranged in parallel, and their running surfaces do not overlap. The same applies to the stabilizing pneumatic tires 4 and 4'and the stabilizing solid tires 6 and 6 '. All of them are pneumatic tires 3, 3 ', 4, 4'
Is always grounding and traveling, and solid tires 5, 5 ', 6, 6'are grounding and traveling only when punctured. Therefore, the solid tires 5, 5 ', 6, 6'usually float above the track girder 1.

As a puncture detection device for guiding and stabilizing pneumatic tires 3, 3 ', 4, 4'of such a monorail vehicle, electric switches are provided on the running surfaces of the guiding and stabilizing solid tires 5, 5', 6, 6 '. Buried 7,7 ', 8,8'. In FIG. 1, if the stabilizing pneumatic tire 4 is flat, the stabilizing solid tire 6 is grounded to the track girder 1,
By touching the electric switch 8, the electric switch 8
The electrical switch 8 is connected by touching. Although not shown in the drawing, each of the electric switches 7, 7 ', 8, 8'is a parallel circuit, and when any of the solid tires 5, 5', 6, 6'passes through with being grounded. Only electrical circuits are connected. Then, when the electric switch 8 is connected and the electric circuit is connected, the magnet switch works to energize, and, for example, the indicator lamp lights. Incidentally, the push switch is always energized, and when the push switch is pressed (off state), it is turned off by the disconnection action. Therefore, by providing the indicator light and the push switch in, for example, the driving command room, it is possible to detect a punctured vehicle and notify the driver. However, in contrast to the method of directly detecting the internal pressure of the tire, this method is difficult to enhance the detection and accuracy of the detection because the horizontal displacement (horizontal guide wheel / stable wheel) at the time of puncture is small.

[Object of the Invention]

The object of the present invention is to provide a horizontal wheel (guide /
(For stability) To increase the reliability of tire puncture detection,
It is an object of the present invention to provide a tire puncture detection method for a horizontal wheel, which detects the presence or absence of a puncture based on the total pressing force of the pair of left and right horizontal wheels on the side surface of the track girder.

Furthermore, another object of the present invention is to detect the presence or absence of a puncture on the horizontal girder side of the pair of left and right horizontal wheels to detect the presence or absence of a puncture, in order to increase the reliability of the puncture detection of the horizontal wheel tire. To provide a device.

[Outline of Invention]

Since the horizontal pneumatic tire (guide / stabilizing wheel) is flat and the horizontal displacement of the bogie due to the flat is extremely small, a stroke is required and the conventional detection mechanism using an electric switch cannot perform satisfactory detection. The present invention is configured to detect the presence or absence of a puncture by sensing and determining a decrease in the internal pressure of the tire by the sum of a pair of left and right pressing forces of the horizontal pneumatic tire that is always directly pressing the track.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. The configuration of the horizontal wheels of the monorail vehicle is shown in FIGS. 2 and 3.
In the figure, the guiding pneumatic tires 3 and 3'are provided as a pair of horizontal wheels to which an initial pressing force (αkg) is applied and which are provided on the left and right sides of the truck with the track girder 1 interposed therebetween. The guide pneumatic tire 3,
3'is also provided in front of and behind the bogie, and four bogies are installed in one bogie, and when the bogies in front and back are combined, it has eight pneumatic tires for one car. Similarly, the pneumatic pneumatic tires 4, 4'are also provided as a pair of horizontal wheels to which an initial pressing force (αkg) is applied and which are provided on the left and right sides of the truck with the track girder 1 interposed therebetween. The stabilizing pneumatic tires 4 and 4'are also provided on the front and rear bogies, so that one car is 4
It has a book for stabilizing pneumatic tires.

As described above, the guiding pneumatic tires 3 and 3'and the stabilizing pneumatic tires 4 and 4'are mounted as a pair of horizontal wheels sandwiching the track girder 1 so as to give an initial pressing force (αkg).

That is, each horizontal pneumatic tire is mounted on the horizontal wheel with a predetermined deflection by sandwiching the track girder 1 at a predetermined position on the vehicle side and giving each tire of a pair of left and right horizontal wheels a predetermined deflection. It can be installed by giving an initial pressing force (αkg). Therefore, the sum of the initial pressing force (αkg) on the side surfaces of the pair of left and right horizontal wheel raceways is generated from the total value of the deflection of each of the left and right tires. Is the sum of

The sum of the pressing forces of the pair of left and right horizontal wheels (the sum of the initial pressing forces of the pair of horizontal wheels) is used for guiding pneumatic tires 3 during vehicle traveling.
FIG. 4 shows a load waveform diagram acting on the 3'and the stabilizing pneumatic tires 4, 4 '. In FIG. 4, the horizontal axis represents the time axis when the vehicle is running, and the vertical axis represents the load detection unit, for example, the lateral side of the track girder of each horizontal wheel passing through special joints 12 to 15 in FIG. FIG. 9 is a load waveform diagram showing the situation of the total pressing force and printed out after the arithmetic processing. In FIG. 4, the A line indicates the sum of the pressing forces of the pair of left and right tires of the guiding pneumatic tires 3, 3 '(the sum of the initial pressing forces of the pair of horizontal wheels), and the A line indicates the stabilizing pneumatic tire 4 , 4 ', the sum of the pressing forces of the pair of left and right tires (the sum of the initial pressing forces of the pair of horizontal wheels).

FIG. 5 shows an enlarged view of part (c) of FIG. The present invention determines the acting load on a tire by the sum of the pressing forces of a pair of left and right horizontal wheel tires. In FIG. 5, for example, the line A is the waveform of a normal tire (when the internal pressure is normal),
Line B shows the waveform of a punctured tire (when the internal pressure drops), the normal tire detection level is d (when the load δ is exceeded), and the puncture tire detection level is o (when the load is less than δ and the load δ'is exceeded). Thus, the waveform of the normal tire detection level is preset as c, and the waveform of the puncture tire detection level is preset as d. That is, as a determination of the presence or absence of a punctured tire, the one in which the pressing force of the pair of horizontal wheels exceeds the level of the load δ is a normal tire, and the one in which the pressing force of the pair of horizontal wheels exceeds the level of the load δ ′ and is equal to or less than the level of the load δ is the punctured tire. It is judged and detected. (There is also one that detects the presence of a pair of left and right horizontal wheels when the vehicle is running, acting during normal operation and puncture when the load is δ '. Note that a pair of left and right horizontal wheel tires (guide wheel or stable wheel)
In order to calculate the sum of the pressing forces on the side of the track girder of the pair of left and right horizontal wheels from the pressing force acting on each of them (to improve the detection sensitivity and accuracy of puncture detection), The respective maximum values of the pressing forces of are added together. Therefore, the load δ used for the detection level of the normal tire is, for example, a value of about 70% of the value obtained by adding the maximum value of the pressing force to the side surface of the raceway girder of the horizontal wheel is preset. . Further, the load .delta. ', Which is also used at the time of puncturing for detecting the presence or absence of the pair of left and right horizontal wheels, is set to a value of about 20% of the added value in advance.

FIG. 6 is a concrete example for detecting the load acting on the tires of a pair of horizontal wheels. The pneumatic tires 3 and 3'for guiding the joint portion (conventional finger plate portion) of the track girder 1 are shown in FIG.
And special joints 12 to 15 for load detection are provided as load detection means on the road surfaces of the pneumatic tires 4 and 4'for stabilization.
A strain gauge is attached to the back surface of each of the special joints 12 to 15, and the sum of the left and right loads of a pair of horizontal wheels acting on the special joints 12 to 15 is detected and calculated by the amount of strain. That is, the load output that appears each time each horizontal tire passes is determined by A / D conversion. The determination based on this loading is to scan the four inputs from the special joints 12 to 15 every 1 ms and load them to the CPU, and detect the tires when the vehicle is running at the set tire detection level (load is δ'kg) (presence / absence). Confirmation)
The position of the tire is obtained, and at the same time, the presence / absence of a puncture of the pair of horizontal wheels is determined based on whether or not the normal tire detection level (set load = δ kg) is exceeded. Then, if there is a puncture, the time and the position of the puncture tire are printed out on the load waveform chart to be printed out, and the puncture is displayed by an alarm.

In this case, the strain gauge used for load detection detects only the load in the direction perpendicular to the finger plate portion and cancels the load from the other direction. For example, a shear strain gauge or the like is desirable.

Instead of the special joint, a method of burying the load cell in the track girder is also possible. In this case, since it cannot be installed at the joint part of the track girder, it is necessary to install it on a steel girder that can be buried or install it on a new concrete girder. With this method, the reliability of the durability of the parts installed on the track is further improved.

A load detector using a special joint or load cell is installed in front of the operation command room, and measuring instruments such as an A / D converter are installed in the operation command room.

As described above, the presence / absence of a puncture of the pneumatic tires of the pair of horizontal wheels is detected by determining the decrease in the internal pressure of the tire by the sum of the pressing forces of the tires of the pair of left and right horizontal wheels.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the tire puncture detection method and apparatus of the horizontal wheel which improved the reliability of the puncture detection of the pneumatic tire for guide wheels / stable wheels can be provided. Also, by installing a special joint on the existing line, it is not necessary to make extensive modifications to the track girders, so installation can be done easily.

[Brief description of drawings]

FIG. 1 is a front view showing an arrangement of track girders and wheels for a monorail vehicle, FIGS. 2 and 3 are plan views and side views showing a configuration of a horizontal wheel, and FIG. 4 is a left and right load acting on a guide stabilizing wheel. FIG. 5 is a detailed view of FIG. 4, and FIG. 6 is an explanatory view showing the installation procedure of the special joint. 1 ... Track girder, 3,3 '... Pneumatic tire for guide, 4,
4 '... Pneumatic tire for stabilization 5, 5' ... Solid tire for guidance, 6, 6 '... Solid tire for stabilization, 12, 1
3, 14, 15 ... Special joint

Front page continuation (72) Inventor Masatomo Kido 794 Higashitoyoi, Shimomatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hiritsu Manufacturing Co., Ltd. (56) References JP-A-55-79748 (JP, A) JP-A-58-81808 ( JP, A)

Claims (2)

[Claims] 1. A puncture detection method for a horizontal wheel of a track vehicle having a pair of horizontal wheels rolling on the side surface of a track girder and sandwiching the track girder, comprising: Each of the pressing forces is detected, and the presence or absence of a pair of horizontal wheels is detected from the sum of the pressing forces of the detected pair of horizontal wheels to the side surfaces of the raceway girders. Of the pressing force to the side of the track girder corresponding to the pair of horizontal wheels and the preset puncture judgment value based on the sum of the pressing force to the side of the track girder, and the result of the presence / absence detection of the pair of horizontal wheels is present. There is a tire puncture detection of a horizontal wheel characterized by determining that the pair of horizontal wheels are in a puncture state when the sum of the pressing forces of the pair of horizontal wheels on the side surface of the track girder is equal to or less than the puncture determination value. Method. 2. A puncture detection device for a horizontal wheel of a track vehicle, comprising a pair of horizontal wheels rolling on the side surface of a track girder and sandwiching the track girder, wherein a pair of horizontal wheels rolling on the side surface of the track girder. Load detecting means installed corresponding to the respective positions, adding means for adding the pressing forces of the pair of horizontal wheels detected by the load detecting means, and a pair of horizontal values based on the addition results of the adding means. The presence / absence of a ring is detected, and a preset value for puncture determination corresponding to the pair of horizontal wheels is compared with a pressing force after addition obtained from the adding means, and the pair of A tire puncture detection device for a horizontal wheel, comprising: a determination unit that determines a puncture when a presence / absence detection result of the horizontal wheel is present and a load value after addition is less than or equal to a set value.