JPS5991301A - Truck for measuring uneven waveform on top surface of rail - Google Patents

Abstract

PURPOSE:To record the minute uneven parts on the top surfaces of rails accurately and continuously, by fixing one end of an elastic member, which is closely contacted with the top surface of each rail and slidden and has elasticity, to the main body of a running body, which runs on the rails, and providing an accelerating sensor on the other end of the member. CONSTITUTION:The minute uneven waveforms at the top surfaces of rails on both right and left sides are simultaneously measured. In a truck, the following parts are provided: elastic running wheels 1, in which an elastic material such as rubber, which absorbs and buffers high frequency vibrations, is used in the main part; guide wheels 2, which guide the wheels 1 so that they are not derailed; and main running bodies 6 and 7 (not shown in the Figure) of running bodies. One end of plate spring shaped flexible member 3 is fixed to the lower surface of each of the main running bodies 6 and 7 so that one end is directed obliquely downward. The flexible member 3 has resilience so that each shoe 4, which is attached to the end of the flexible member 3, pushes the top surface of the rail with an appropriate repelling force when the truck is mounted on the rails. An acceleration sensor 5, which has a function of conveying the change in acceleration to an electric signal, is attached to the upper part of each shoe 4 so as to detect the up and down acceration.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring cart used to accurately and quickly create a record of longitudinal unevenness waveforms on the top surface of a rail necessary for maintenance management of railway tracks.

Traditionally, measuring devices used for the above purposes include rectangular/
A device that temporarily fixes both ends of a longitudinal member of approximately 1 to 2 meters to the rail head, and mechanically or electrically measures and records changes in the distance from the longitudinal member to the rail top surface, or in the longitudinal direction. Using a member that connects the front and rear wheel positions of the three arranged wheels as a reference, we use a Masaya measurement mechanism that continuously measures changes in the vertical relative position of the center wheel during running, and use mechanical or electronic calculations to measure the unevenness waveform on the top surface of the rail. However, the former has the disadvantage that continuous recording cannot be obtained unless the movement of transferring the longitudinal member is repeated for each measurement, requiring a large amount of time for measurement. Although it is possible to measure the parietal waveform relatively, it has the disadvantage that its actual shape on the ground cannot be measured.

The system converts the vertical acceleration changes that occur when moving into an electrical signal, and calculates the electrical signals electronically to continuously obtain unevenness waveform data on the top surface of the rail.It is accurate even for minute unevenness of 1 millimeter or less. To provide a rail top surface unevenness waveform measuring cart capable of rapid continuous recording.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 6 show an embodiment of a bogie for simultaneously measuring the unevenness waveforms on the rail top surface of both left and right rails. Guide wheels B and 7 are for guiding the vehicle to travel while maintaining a constant left-right distance, and reference numerals 7 are elastic wheels for traveling and a main body of the traveling body equipped with bearings for the guide wheels.As shown in FIG. One end of a flexible member 3 in the form of a leaf spring is fixed diagonally downward to the lower surface of the main body 6.7 of the traveling body 6.7.Furthermore, the flexible member 3 is fixed when the bogie of the present invention is mounted on a rail. The shoe attached to the end of the flexible member 3 presses the top surface of the rail with an appropriate repulsive force. An acceleration sensor 5, which has a function of converting changes in acceleration into electrical signals, is attached to the upper part of the shoe in a direction that senses vertical acceleration.

The traveling body framework, which is composed of a front horizontal beam and a rear tank beam 9, has a suspension link IO1, upper bearing l/, lower bearing/; 2, hanging link shaft 1, to prevent the traveling body main body 6.7 from overturning.
3, it is supported so as to be able to swing left and right. Further, the rear tank beam 9 is fixed to the main body 9 of the traveling body 9 by the same means as the front horizontal beam (g) and runs.

To use the bogie according to the present invention, the bogie is mounted on a rail as shown in FIG. Connect the cable to an electronic computing device mounted on a vehicle. The electronic arithmetic unit mounted on the vehicle inputs the electrical signal from the acceleration sensor S, converts it into an electrical signal proportional to the value integrated by
For example, Tokugansho! ;&-/:l//13 Filter processing is performed to detect locations where wheel load fluctuations occur, and it is sufficient for an electric recording device to record the waveform on recording paper or magnetically record it on magnetic tape. Use one that has the ability to amplify electrical signals.

In this state, when the bogie is connected to vehicles by the connecting rod 13 and towed by a towed vehicle, the shoe slides while being in close contact with the top surface of the rail, causing vertical displacement corresponding to the uneven waveform of the top surface. The left acceleration sensor senses this displacement and generates an electrical signal proportional to the vertical acceleration, which is then sent to an electronic arithmetic unit. Moreover, this shoe can also be used as a wheel depending on the situation. The electronic arithmetic unit inputs the electrical signal, integrates it once, and sends an electrical signal proportional to the vertical displacement of the shoe to the electrical recording device. The output signal obtained by integrating the input signal by the electronic arithmetic unit is an electric signal obtained by calculating the vertical displacement of Shu Hong on a time basis, but this electric signal is converted into a distance-based displacement M (i.e. To convert the waveform into a record proportional to the unevenness waveform on the top surface of the rail, use a method such as recording the waveform by making the recording paper feeding speed of the electric recording device proportional to the traveling speed of the trolley, or using a computer. -Ichiru.

'18 Togaku Map, Togaku Map, and FIG. 1 are other embodiments of a single bogie for measuring the uneven waveform of the top surface of one rail according to the present invention.

In the figure, /Otsu, /7, /If, /9.20゜body 6
．． 7. Flexible member 3, shoe, acceleration sensor: These parts are used for the same purpose as the sensor S.

The traveling body framework λ prevents the traveling body body/g from falling.

A bearing for the traveling wheel 23 is attached to one end of the member. The armrest aS is swingably mounted on a horizontal axis λ attached to an upper bearing 2B located on the top 1 of the traveling body framework a2. Also, 1 gold 25 is a guide wheel by a spring 2g, and 2 da is Relu? An @I moment is given that causes the guide wheel 17 to come into close contact with the head side of the inner side of the gauge, but the rotational moment is not limited to the close contact between the guide wheel 2 and the rail 2, but also when the guide wheel 17 is in close contact with the rail 3θ. Choose a size that is large enough to serve as a press so that it does not separate from the side of the medial J section.

Other examples of how to use the car shown in FIGS. 7, c, and 9 are shown in FIGS. 1, 2, 3, 7, 5, and 6.
The method of using the trolley according to the embodiment of the present invention shown in the figures is the same.

According to the present invention, a mechanism using a helical spring or the like of the traveling body framework allows the bogie to slide while directly contacting the top surface of the rail, and at the same time generates an electric signal corresponding to the amount of unevenness C of the rail. Shoes, acceleration sensors, flexible members that support them, etc. used for this can be made smaller and lighter. The shoe can slide well following the uneven waveform on the top surface of the rail. In addition, by using elastic wheels for the running wheels, the main body of the running body can be manufactured to be lightweight, so it is relatively easy to use without generating high-frequency vibrations that could impede measurement on the rail to be measured or on the bogie itself. At high travel speeds, l
Accurate measurement results can be obtained even for minute irregularities of less than a millimeter.

[Brief explanation of the drawing]

Kat/, /Otsu, Ko3... Elastic wheel for running, λ, 17
．． 2 da...--Inner wheel, 3, lq...
Flexible member, da, -〇...- Shun-5X2ha-
-・Acceleration sensor, A,? , 1g...
Running body! Main body, g......Front sideways, wo...
Horizontal beam at the rear of the song, /θj・,. Suspension link, //, 21... Upper bearing, /2.
...lower bearing, /3 ...suspension link shaft,
lll...-Torsion spiral spring, /t...Connecting rod,
Here...Antecedent framework, here...Archive,
27...Horizontal axis, bar...spring, spring, 3
0... Rail 1; i゛ Authorized Agent Japanese National Railways Tribunal Office Law S Section Manager Sekiba Daisiya 1 Inspection/+z Resai 6f Off Sashigi 8 boat O? Hu

Claims (1)

[Claims] One end of a flexible member that slides in close contact with the top surface of the rail and has elasticity is attached to the main body of the running body that runs on a rail that is equipped with a plurality of elastic wheels for running and a plurality of guide wheels per rail on one side. In addition to being fixed, an acceleration sensor having a function of generating an electric signal proportional to vertical acceleration is provided at the other end of the flexible member, and the traveling body main body is mounted on rails on both left and right sides so that it can swing left and right. A rail top surface unevenness waveform measurement trolley, characterized in that it is connected by a traveling body framework.