JPS62228110A - Apparatus for detecting and measuring abrasion of rail - Google Patents

Abstract

PURPOSE:To prevent the damage of a detector by escaping said detector upwardly at the place of an obstruction, by supporting a holding member for holding the detector in a state upwardly displaceable against the pressing force of a spring and forming each of the lower surfaces of front and rear parts of the detector into an inclined surface. CONSTITUTION:A detecting and measuring apparatus is constituted so as to perform detection and measurement while being allowed to run on a rail 2 in such a state that a detector 14 holds a definite interval from the upper surface of the rail 2 and the lower end 15' in the vicinity of the circumference of the detector 14 is protruded downwardly from the detector 14. By this constitution, even when the inclined lower surfaces 15d of the left and rear parts of the detector 14 ride on an obstruction such as difference in level, a holding member 15 is gradually pushed upwardly along the obstruction against the pressing force of a spring 18 and the detector 14 held to the holding member 15 is also displaced upwardly and, even if the lower end of the holding member 15 is contacted with the obstruction, the detector 14 does not contact with the obstruction at the lower end thereof and can pass the place of the obstruction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wear measuring device that continuously measures wave-like wear on the upper surface of a rail while traveling on the rail of a railway track.

[Prior Art] The upper surface of the rail (the upper surface of the rail head) of a railway track has wear that exhibits unevenness in the longitudinal direction of the rail due to friction with the wheels of vehicles running on the rail. As this wave-like wear progresses, each time a vehicle passes, it causes severe vibrations and shocks to the vehicle, track, and roadbed, worsening the ride comfort for passengers, and promoting the destruction of the track and roadbed. In addition, noise is generated, causing inconveniences such as noise pollution along the railway lines.

Therefore, traditionally, before these inconveniences occur,
The wear occurring on the upper surface of the rail is measured, and if necessary, the wave-like wear and deformed layer are removed to correct the contour of the rail head.

As shown in Fig. 5, as a conventional device for detecting undulating wear etc. occurring on the top surface of the rail, an inspection unit (10) equipped with a detector for detecting irregularities on the top surface of the rail is used. There is a system that is installed on the left and right sides of a running inspection trolley (11) to inspect the wavy wear etc. of the rail while the trolley is running. In recent years, non-contact detectors such as optical displacement sensors, capacitance displacement sensors, or magnetic displacement sensors are often used as detectors installed in the inspection unit.

As shown in Figure 6, such a non-contact type detector has a distance of approximately 2.5 mm between the tip of the detector (14°) and the rail (1'').
．． The vehicle is run while maintaining a very small gap (So), and wear (H) is measured by continuously detecting changes in the gap due to unevenness.

[Problems to be solved by the invention] However, the level difference (ho) at the rail joint part (a)
), or if an obstacle such as a deformed layer or foreign matter due to wear on the rail is larger than the gap (So), the tip of the detector (14°) will be located above the step (ho) or the deformed layer, etc. It will collide with an obstacle and be damaged. If such a detector is damaged, it is necessary to temporarily stop the inspection work and return to the work base in order to replace it, consuming a great deal of time and effort. This type of detector is quite expensive, and the cost of replacing it will be large.

In view of the above, the present invention provides that, in a non-contact type detector used in an inspection unit, even if there is an obstacle such as a step or a deformed layer at a rail joint, the detector will collide and be damaged. It is an object of the present invention to provide a rail wear inspection device that can perform inspection without fear of damage.

[Means for Solving the Problems] In order to solve the above problems, the present invention displaces the holding member that holds the detector in the inspection unit upward according to the level difference in the rail joint portion. support to get
The detector is made to escape upward.

cJ However, the present invention is a rail wear inspection method in which an inspection unit equipped with a non-contact type detector for detecting irregularities on the upper surface of the rail is mounted on an inspection cart that can run on the rails of a track. In the device, in particular, the holding member that holds the detector in the inspection unit is attached to the plate at the bottom of the inspection unit.
It is held at a predetermined setting position by the pressing force of the spring, and supported so that it can be displaced upwardly against the pressing force of the spring. It is characterized in that the front and rear lower surfaces along the longitudinal direction of the rail are formed into inclined surfaces such that the gap between the front and rear lower surfaces of the rail and the rail upper surface gradually increases as the distance from the central detector increases.

[Function] The rail wear inspection device of the present invention as described above runs on the rail of the track with the inspection cart and is held in the inspection unit with a slight gap between it and the upper surface of the rail. The detector detects irregularities on the top surface of the rail and measures wear and tear. During this inspection, the inspection unit detects:! The holding member that holds S is normally pressed by a spring and held at a predetermined setting position d, so that the measurement is performed with the detector maintaining a predetermined gap from the reference plane on the top of the rail. . If you come to a place where there is an obstacle such as a step at a rail joint or a deformed layer on the rail, the lower end of the holding member near the periphery of the detector protrudes downward from the detector, so the front and rear The inclined surface of the lower surface rides on an obstacle such as a step, and as a result, the holding member is gradually displaced upward along the obstacle against the pressing force of the spring, and accordingly, the holding member is held by the holding member. The detector is also displaced upward, and since the gap between the lower end of the detector and the rail is larger than the gap between the lower end of the surrounding area that protrudes from the detector and the rail, the lower end of the holding member comes into contact with an obstacle. The lower end of the detector can pass through the obstacle without touching the obstacle. After passing through the obstacle, it is lowered again to the setting position by the force of the spring and held in its normal state, so that measurements can be continued.

[Example] Next, an example of the present invention will be described based on FIGS. 1 to 5. (10) is an inspection trolley (11) that can run on the track rails (1) (1) with wheels (12) and (13) after moeing.
The inspection unit (10) is equipped with a non-contact type detector (14) for detecting irregularities on the upper surface of the rail. This non-contact type detector (14) uses a coil in the sensor head to emit a high frequency wave, and the sensor head's magnetic
When a metal object enters the field, an induced ffl flow flows inside the metal object due to electromagnetic induction, and a magnetic displacement sensor detects a loss of 1Ω in the inductance of the coil of the sensor head.
Alternatively, a capacitance displacement sensor that detects the capacitance of the gap with the top surface of the rail, or an optical sensor that uses laser light may be used.

(15) is the detector (
14), and in the case shown, two detectors (14) (14) are fitted into a holding hole in the center of the holding member (15) in the longitudinal direction of the rail, that is, the front and back. Rain detection B (
14) The lower end of (14) is exposed in the F direction. (16)
is a rubber bush that holds the signal wire of the detector fitted into the holding hole. Note that wear on the top surface of the rail may be measured by holding only one detector on the holding member.

The holding member (15) is attached to the inspection unit (10).
) is provided approximately parallel to the upper surface of the rail at the bottom of the plate (17), and is held in a predetermined setting position by the pressing force of a spring (18). It is supported so as to be able to move upward against the pressure, and the case shown in the figure has the following configuration.

The main part (15a) of the holding member (15) is attached to the plate (17) by fitting it into an opening in the center of the plate (17).
7) As well as protruding downward, the main part (15a)
The extending edges (15b) and (15c) extending in the front-rear direction are located on the upper side of the plate (17), and the extending edges (ISB) on one end thereof are attached to the upper side of the plate (17). A support ball portion (19) protruding from the support ball portion (19) and a holding member (15
) and a fitting ring (20) having an inner circumferential surface corresponding to the support ball part (19), and can swing around the support ball part (19) as a fulcrum by a first stage spherical bearing (21). The part supported by this spherical bearing means (21) has a
l! A spring screw (22) is provided to restrict 1fl. (23) is the base of the spherical bearing means (21). Further, in the extending edge (15C) on the other end side opposite to the supporting portion, the mounting ff1 (
17) A spring (18) for pressing the holding member (15) is disposed on the outer periphery of the @ (24) which is erected and passes the extending edge (15c) through Ui. Setting screws (25) (25) are attached to the extending edge (15c) at intervals of ) is designed to be point-supported by a receiving part (26) (2G) provided at the base. This allows the holding member (15)
is held in a predetermined setting position, and only when a pushing force is applied from below, the spring (18)
It is provided so that it can be displaced upwardly against the pressing force of. (
27) (27) is a guide installed on the plate (17) that mounts the holding member (15) in the left and right positions, and restricts the movement of the holding member (15) in the left and right direction and prevents the movement of the holding member (15) in the vertical direction. It is designed to ensure that it works properly.

In the holding member (15), the lower end (15°) of a portion near the periphery of the detector (14) in the main portion (15a) that holds the detector (14) protrudes below the detector (14), The gap between the lower end (15') and the surface of the rail (1) (
Sl) is formed so that it is smaller than the gap (S) between the detector (14) and the top surface of the rail, and it is
An inclined surface (15 dl) is gradually inclined upward so that the lower surface of the front intrusion along the longitudinal direction of the rail becomes larger as the distance from the central detector (14) increases.
(15d).

For example, if the gap (S) between the lower end of the detector (14) and the rail (1) is about 2.5 m, the lower end (15') near the periphery of the holding member (14) and the rail (1) Gap (S
l) is 0.5. Furthermore, the maximum part of the gap with the rail (1) due to the slope is at least 5III1
It is set to maintain a gap of about 1.

In the case of Figure 83, the lower surface of the main part is slightly recessed around the detector to expose the lower end of the detector. It can also be made to stand out.

In the figure, (28) and (28) are proximity switches that are placed in front and behind the non-contact detector (14) with a slight distance between them, and the gap between them and the top of the rail is at least a certain level. When this occurs, the proximity switch (28) is provided to detect that the joint portion of the rail (1) is a concave portion other than wear. In addition, the inspection unit (10
) is installed at the lower end of the front and rear side plates of the rail (1) to remove foreign matter etc. on the rail (1).
) has been established. (30) is the inspection unit (
10) is installed so that it can be measured at a fixed position from the side of the rail (1), and is a hydraulic or pneumatic cylinder (31) arranged in the width direction of the rail as shown in Figure 5.
) causes the roller (30) to move r of the rail (1).
The Jn portion is provided so as to face the side surface, and is thereby positioned.

The above inspection trolley (11) has front and rear wheels (12) (
13) Hydraulic cylinders (33) for storage settings installed between the trolley frame (11a) (11b) and the work vehicle (32) for grinding molds, etc. in the vicinity allow inspection during non-work such as forwarding. The entire device, together with the inspection trolley (11), is raised above the top of the rail head and stored within the vehicle limits, and the inspection trolley (11) is lowered only during work, and the guide wheels (12) and (13) are moved above the rail head. The inspection unit (10) is set in a predetermined position with respect to the rail (1) by making contact with the upper surface of the rail (1).

In the wear inspection work on the upper surface of the rail (1) using the wear inspection device of the present invention having the above configuration, the inspection unit (
Inspection is performed while the detector (14) in 10) is running on the rail while maintaining a constant gap from the top surface of the rail (1).During this inspection, the rail joint area In places where there are obstacles such as steps (h) or deformed layers in (a), the mounting is done at the lower end (near the periphery of the detector (14) on the holding member (15) that protrudes downward from the opening of the plate (17). 15N protrudes downward from the detector (14), the inclined surfaces (15d) of its front and rear lower surfaces climb onto obstacles such as steps (h), and as a result, the holding member (
15) is gradually pushed upward along the obstacle against the pressing force of the spring (18), and along with this, the detector (14) held by this holding member (15) also moves upward. The gap (S) between the lower end of the detector (14) and the rail (1) is the same as the gap (S) between the lower end (15°) near the periphery protruding from the detector (14) and the rail (1) ($ 1), the lower end of the holding member (15) is in contact with the obstacle b, and the lower end of the detector (14) can pass through the obstacle without coming into contact with the obstacle. After passing the obstacle in this way, the pressure of the spring (18) pushes it down to a predetermined setting position and holds it there, after which it is possible to continue normal inspection work.

[Effects of the Invention] As described above, according to the rail wear detection device of the present invention, the detector can be moved upward at the location of obstacles such as steps at rail joints or deformed layers. Damage can be prevented. Therefore, the inspection work can be carried out without interruption, the use period of the expensive detector can be extended, and it is economical.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of a part of the inspection unit showing an embodiment of the present invention, FIG.
The figure is an enlarged view showing the operating state according to the present invention, Figure 4 is a side view of the entire wear inspection device equipped with the inspection unit on the inspection cart, Figure 5 is a perspective view of the same, and Figure 6 is the conventional device. FIG. (1)...Rail, (10)...Inspection unit, (
11)...Inspection trolley, (12)(13)...Wheels,
(14)...detector, (15)...holding member, (1
5')...Lower end near the periphery of the detector, (15a)--
・Main part, (15bH15c)...Extending edge, f15d)
... Sloped surface, (17) ... Mounted on a board, (18) ...
・Spring, (21)... Spherical bearing means, (25)
... Setting screw, (27) ... Guide, (2
8) Proximity switch patent applicant: Shibaura Seisakusho Co., Ltd. Procedures N-Yf= (spontaneous) May 13, 1986

Claims (1)

[Claims] 1. An inspection unit equipped with a non-contact detector that detects irregularities on the top surface of the rail is mounted on an inspection cart that can run on the rails of the track, and a holder that holds the detector in the inspection unit Place the component against the mounting plate at the bottom of the inspection unit.
It is held in a predetermined setting position by the pressing force of the spring and is supported so as to be able to be displaced upwardly against the pressing force of the spring, and furthermore, this holding member has a lower end near the periphery of the detector protruding downward from the lower end of the detector. A rail wear measuring device characterized in that the front and rear lower surfaces along the longitudinal direction of the rail are formed as inclined surfaces such that the gap between the front and rear lower surfaces of the rail and the rail upper surface gradually increases as the distance from the central detector increases.