JP2005226998A - Rail displacement optical detector for track inspection car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rail displacement optical detector which is easy to clean and a hood provided thereon does not tend to fall off when cleaning a light transmission window during routine inspections or the like to prevent the detection accuracy of the detector detecting rail displacement from deteriorating. <P>SOLUTION: The present invention in which a floodlight optical system irradiating light to a rail and light receive optical system receiving the light reflected by the rail are built, comprises a detector body which has a light projecting window transmitting the light and a light receiving window transmitting the reflected light, and whose inside is hermetically sealed, and a hood which is provided on the detector body and has a slit on the front thereof to transmit the light and the reflected light, and whose inside is hermetically sealed exclusive of the slit. The shape of the side of the hood adjacent to the plane of the light projecting window and the light receiving window which become the outside when mounting the detector to a track inspection car, is a rectangle, and an openable and closable window having a larger opening then the slit is provided on the side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical rail displacement detector for a track inspection vehicle, and more specifically, in a rail displacement measurement device mounted on a track inspection vehicle for optically measuring the left and right displacement amounts of a rail. In order to prevent a decrease in the detection accuracy of the detector that detects the amount, the hood provided on the detector is difficult to drop for cleaning work of the light transmission window that is performed during periodic inspections, etc. It relates to the improvement of the structure of the easy detector.

In order to ensure the safety of train operation, whether or not the rails are within the reference gauge track interval or the allowable interval is periodically measured by a rail displacement measuring device installed in the track inspection vehicle. ing.
As a conventional rail displacement measuring device, a technique for mounting and measuring an optical rail displacement detector on a track inspection vehicle is known (Patent Document 1). This rail displacement measuring device facilitates the angle adjustment of the projector and the light receiver and reduces the adjustment effort.
The projector and light receiver of the optical rail displacement detector are each housed in a hermetically sealed casing, and have a structure that allows light to pass through a lens, a mirror, a light transmission window of a protective glass plate, and the like. Further, the housing is provided with a hood to protect the housing.
If this structure is not adopted, this detector is installed in the vicinity of the traveling wheel of the track inspection vehicle at a position lower than the bogie of the inner vehicle body with respect to the rail. This is because objects, dust, rainwater, snow, etc., jump into the housing from the outside, or the projector or receiver is destroyed or cause misalignment, which prevents the high-accuracy rail displacement from being obtained. Because it is done. Furthermore, the hood is structured to avoid openings other than slit holes through which light passes in order to prevent disturbance light from entering as much as possible.
JP 11-344304 A

FIG. 5 is an illustration of the optical rail displacement detector shown in the embodiment of Patent Document 1. (A) is the top view, (b) is the side view explaining the attachment state.
Reference numeral 1 is a rail displacement measuring device, and 2 is an optical rail displacement detector. Reference numeral 3 denotes a measurement circuit unit.
The detector 2 detects the amount of displacement of the rail 91 by irradiating the rail 91 with light. This is fixed to a carriage 81 (usually via a bracket) of the track inspection and measurement car with a bolt or the like via its mounting hole 24. Reference numeral 22 denotes a sealing cover for sealing the casing provided at the upper part of the rectangular casing of the detector 2, and the casing portion surrounded by the casing is the detector body. As indicated by dotted lines, a glass window 32 for light projection and a glass window 33 for light reception are provided inside.
Reference numeral 23 denotes a hood (protective cover) attached to the detector main body, and the hood 23 is detachable on the bases 21 a and 21 b of the attachment base 21. Reference numerals 25 and 26 denote slit holes provided in the airframe 21b. The hood 23 is substantially hermetically sealed with the base 21b so that objects, dust, rainwater, snow, and the like do not come into contact with the housing from the outside, and the openings are only the slit holes 25 and 26. It has become.
With such a structure, a light projecting system composed of a mirror and a laser diode is housed behind the light projecting glass window 32 inside the case sealed by the hermetic cover 22. A light receiving system comprising a mirror and a PDS (position sensing device) is housed on the rear side.
Reference numeral 4 denotes a signal cable, which connects the detector 2 and the measurement circuit unit 3. Reference numeral 11 denotes a pulse generator, and 12 denotes a displacement amount detection unit, both of which are provided on the carriage 81 side.

In the optical rail displacement detector having such a structure, the rail displacement amount is highly accurate unless the glass window 32 for light projection and the glass window 33 for light reception are cleaned at regular inspections or irregularly. I cannot measure.
When the inspection vehicle enters the pit (base), the space between the inspection vehicle carriage and the lower side of the rail is relatively wide, so it enters the space and cleans the detector. Is relatively easy. However, the inspection car rarely enters the pit, and most of the time between the inspection car's carriage and the lower side of the rail at the time of stopping, such as a branch line extending from a general rail that is detained by continuing the inspection. The space in is small.
Therefore, wiping and cleaning the glass window 32 for light projection and the glass window 33 for light reception through the slit on the hood 23 side is a very laborious work. At this time, it is possible to remove the detachable hood 23 and clean the light projection window and the light reception window. However, the hood 23 is a hermetic cover for the detector 2 main body so that the test vehicle does not fall during traveling. Including 22 and the like, these are firmly fixed with a large number of screws. For this reason, it takes time to remove the hood 23, and when the hood 23 is removed, some of the screws are not tightened correctly, or the screws are forgotten to stop and the inspection vehicle is running. There is a problem that a hood fall accident occurs.
An object of the present invention is to solve such problems of the prior art, and in order to prevent a decrease in detection accuracy of a detector that detects the amount of rail displacement, a light transmission window that is used during periodic inspections, etc. An object of the present invention is to provide an optical rail displacement detector that makes it difficult to drop a hood provided on a detector for cleaning work and facilitates cleaning of the detector.

In order to achieve such an object, the optical rail displacement detector of the track inspection vehicle of the present invention is characterized in that the track detection vehicle detects the amount of rail displacement by irradiating the rail with slit-like light. In the optical rail displacement detector,
Built-in light projecting optical system for irradiating light on the rail and light receiving optical system for receiving light reflected from the rail, and having a light projecting window that transmits light and a light receiving window that transmits reflected light, and the inside is substantially sealed A detector body that is in a state and a slit that is attached to the detector body and allows the light (projected light or irradiated light) and reflected light to pass therethrough are substantially sealed inside except for the slit. It has a hood that is in a state,
Opening and closing the side surface of the hood adjacent to the surface of the light projecting window and the light receiving window on the outside with the detector mounted on the track inspection vehicle, and having an opening larger than the slit opening on this side surface Possible windows are provided.

Thus, in the present invention, first, the detector main body and the hood are once separated, and a slit is provided on the hood side, and these are integrally coupled so that the hood does not fall, The side surface of the hood, which is the outer side when the detector is mounted adjacent to the surface with the light receiving window, is rectangular. And the window which can be opened and closed is provided in this rectangular surface, and the opening of the window was made larger than the opening of a slit. Thereby, it is possible to easily clean the light projecting window and the light receiving window by opening the window.
In this case, since this window is outside when the detector is mounted adjacent to the surfaces of the light projection window and the light receiving window, the window can be easily opened and closed. In particular, by allowing the window to be locked as an open / close window of a sliding door with an upper and lower groove, it is possible to prevent the door from falling or opening in the inspection vehicle running state. Alternatively, by allowing the door to be locked as a hinged door (door) opening / closing window, the door can be prevented from falling or opening in the inspection vehicle running state. There is almost no risk that the fall of the hood itself while running the inspection vehicle can be firmly attached to the detector body and integrated.
Since it is not necessary to remove the hood, the problem of the hood dropping accident is reduced. If the open / close window door is a sliding type, the upper and lower grooves are held deep, so that there is almost no fear of the door falling. Since the door is hinged, there is no drop problem.
As a result, an optical rail displacement detector for the track inspection vehicle that is easy to clean for cleaning work that is performed during periodic inspections, etc., in order to prevent a decrease in the detection accuracy of the detector that detects the rail displacement. realizable.

FIG. 1 is a plan view of a rail displacement detector according to an embodiment to which an optical rail displacement detector for a track inspection vehicle according to the present invention is applied. FIG. 2 is an internal view of the optical rail displacement detector. FIG. 3 is a perspective view of the optical rail displacement detector, and FIG. 4 is a perspective view of another embodiment of the optical rail detector. In addition, the member corresponding to FIG. 5 is shown by the code | symbol which added "0" and carried the number.
1 and 2, the detector 20 detects the amount of displacement of the rail 910 by irradiating the rail 910 with slit-shaped light. As shown in FIG. It is attached to a carriage (not shown) with a bolt or the like via a bracket 811. Reference numeral 240 denotes a mounting hole corresponding to a hole provided in the bracket 811. Reference numeral 220 denotes a sealing cover for sealing the casing provided at the upper part of the rectangular casing of the detector 20. As shown by a dotted line, a glass window 320 for projecting light (hereinafter referred to as a projecting window 320) is provided inside. And a glass window 330 for receiving light (hereinafter referred to as a light receiving window 330) is provided protruding toward the hood 230 side.
250 and 260 are slit holes provided in the hood 230. The opening of the hood 230 is only the slit hole. L1 is the optical axis for the mirror 321 of the light projecting optical system that reflects the laser diode for light projection, and L2 is the optical axis for the mirror 331 of the light receiving optical system that reflects to the PDS.
In this embodiment, the hood 230 is integrally attached to the sealing cover 220, and the detector 20 is sealed by the sealing cover 220.

Inside the housing sealed by the hermetic cover 220, a mirror 321 and a laser diode are housed behind the light projection window 320, and a mirror 331 and a PDS are housed behind the light receiving window 330.
Reference numeral 40 denotes a signal cable, which connects the detector 20 and a measurement circuit unit (not shown). Reference numeral 235 denotes a rain cover provided on the hood 230.
Here, a sliding door opening / closing window 231 is provided on the top of the hood 230. The surface on which the opening / closing window 231 is provided is a side surface of the hood 230 that is outside in the detector mounting state adjacent to the surfaces of the light projecting window 320 and the light receiving window 330, and corresponds to the surface of the sealing cover 220. . This side surface has a rectangular shape. Slits 250 and 260 are formed on the front surface of the hood 230.
The opening / closing window 231 includes a sliding door 232, upper and lower groove forming portions 233a, 233b, and a groove forming portion 233c on the side end surface. The groove forming part 233 a is a groove provided in the sealing cover 220, and a plate forming the groove extends to the sealing cover 220 side and is fixed to the sealing cover 220.
On the other hand, the groove forming portion 233b is a groove provided on the rectangular side surface of the hood 230, and the upper and lower portions of the sliding door 232 are inserted between the grooves, and the sliding door 232 is fixed to be slidable.

Therefore, when the sliding door 232 is opened, the side surface of the rectangle is opened as a whole, and this side surface substantially becomes an opening surface formed by a frame of the groove forming portions 233a and 233b and the groove forming portion 233c on the side end surface. Here, an opening larger than the slit holes 250 and 260 is provided. Through this large opening, the light projecting window 320 and the light receiving window 330 can be cleaned, which facilitates the cleaning work.
As shown in FIG. 3, the sliding door 232 is provided with a flange portion 232 a bent at a right angle on the right end surface of FIG. 1. In this flange portion 232 a, a nut 234 a is inserted via a fitted bolt 234. Thus, the hood 230 is integrally fixed. The bolt 234 a is planted and fixed on the right side wall of the hood 230. The nut is a double nut 234a.
Therefore, at the time of cleaning, the glass window 320 and the glass window 330 can be easily wiped and cleaned by sliding the slide lid 231 of the hood 230 and opening the window until the light projection window 320 and the light reception window 330 appear. It becomes possible.
In addition, the sliding door 232 is provided with a protrusion on the front end side so as not to come off, and the protrusion is screwed into the groove portion on the right end of the groove forming portions 233a and 233b so that the protrusions collide with each other so that the sliding door 232 is not pulled out further. It is good to lock to.

FIG. 4 is a perspective view of another embodiment of the optical rail displacement detector. The same components as those in FIG. 1 are denoted by the same reference numerals.
In this embodiment, door opening / closing windows 236 and 237 that are rotated by hinges 236a and 237a are provided on the upper portion of the hood 230.
The positions of the open / close windows 236 and 237 are positions corresponding to the glass window 320 and the glass window 330. The glass window 320 and the glass window 330 are respectively wiped and cleaned from the opening when these windows 236 and 237 are opened.
When the opening / closing windows 236 and 237 are opened, the opening windows are larger than the slit holes 250 and 260. Thereby, the cleaning operation of the light projection window 320 and the light reception window 330 is facilitated.
Each open / close window 236, 237 is provided with keys 238, 239 for locking when the window is closed, and the respective windows are locked thereby.

As described above, the positions of the light projecting system and the light receiving system in the embodiment are merely examples and may be reversed. In this case, the positions of the light projection glass window 320 and the light reception glass window 330 are interchanged.
With respect to the opening / closing window of the sliding door of the embodiment of FIG. 1, the side groove is not necessarily required. Further, although the hood is integrated with the detector main body, it may be detachably attached to such an extent that it does not fall during traveling of the inspection vehicle.
In addition, the opening / closing window of the embodiment is an example, and may be an opening / closing window having another structure, but at least when the window is opened, the window has an opening larger than the opening of the slit on the front side of the hood. There is a need.

FIG. 1 is a plan view of a rail displacement detector according to an embodiment to which an optical rail displacement detector of a track inspection vehicle according to the present invention is applied. FIG. 2 is a cross-sectional view in which the internal state of the optical rail displacement detector is omitted. FIG. 3 is a perspective view of the optical rail displacement detector. FIG. 4 is a perspective view of another embodiment of the optical rail displacement detector. FIG. 5 is an explanatory diagram of an example of a conventional optical rail displacement detector.

Explanation of symbols

1 ... Rail displacement measuring device,
2, 20 ... Optical rail displacement detector,
3 ... measurement circuit, 4 ... signal cable,
11 ... Pulse generator, 12 ... Displacement amount detection unit,
81 ... Carriage inspection car
22, 220 ... Sealing cover,
32, 320 ... Glass window for floodlight,
33, 330 ... glass window for light reception,
24, 240 ... mounting holes,
25, 26, 250, 260 ... slit holes,
23, 230 ... Hood (protective cover),
91, 910 ... rails,
231, 236, 237 ... opening and closing windows, 232 ... sliding doors,
233a, 233b, 233c ... groove forming portion.

Claims (3)

In an optical rail displacement detector for a trajectory inspection vehicle that detects the amount of displacement of the rail by irradiating light on the rail,
A light projecting optical system for irradiating the light to the rail and a light receiving optical system for receiving the reflected light from the rail, and having a light projecting window for transmitting the light and a light receiving window for transmitting the reflected light A detector body substantially sealed,
A slit that is attached to the detector main body and has a slit that allows the light and the reflected light to pass therethrough on the front side, and includes a hood that is substantially sealed inside except for the slit,
The side surface of the hood adjacent to the surface of the light projecting window and the light receiving window, which is the outer side in a state where the detector is attached to the trajectory inspection vehicle, is rectangular, and the side surface of the hood from the opening of the slit An optical rail displacement detector for track inspection vehicles equipped with an openable window with a large opening.   The hood is integrally attached to the detector body, the rectangular side surface of the hood corresponds to the surface of a cover that seals the detector body, and the openable / closable window has an open / close grooved sliding door. The optical rail displacement detector of the track inspection vehicle according to claim 1, wherein the door is a window and the door can be locked in a closed state.     The hood is integrally attached to the detector main body, the rectangular side surface of the hood corresponds to the surface of the cover that seals the detector main body, and the openable / closable window has an open / close door with a hinge. The optical rail displacement detector of the track inspection vehicle according to claim 1, wherein the door is a window and the door can be locked in a closed state.

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