JP7058389B2 - Inspection equipment for obstacle inspection equipment and inspection method for obstacle inspection equipment - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act May 22, 2018 Announced at the 5th Chiba Branch Signal Communication Product Exhibition held at East Japan Railway Company Chiba Branch Building

The present invention relates to an inspection instrument for an obstacle detection device (hereinafter referred to as an obstacle inspection device) installed at a railroad crossing or the like, and more particularly to an inspection instrument provided with an attenuation filter.

As a fault inspection device installed at a railroad crossing, a fault inspection device that emits light from a floodlight using a light source such as a laser and receives light with a light receiver is known. If the emitted light cannot be received by the light receiver, it is determined that there is an obstacle in the railroad crossing, and an emergency stop signal is sent to the train or the like.

Since obstacle detection is based on light transmission, deterioration of either the light emitter or the light receiver causes attenuation of the light receiving level, which may interfere with obstacle detection. Therefore, an attenuation filter is attached to the front surface of the light receiver or the floodlight, and an inspection for checking the light reception level of the laser beam (this is referred to as measurement of the operating margin) is performed periodically (see Non-Patent Document 1).

Specifically, attenuation filters with different attenuation levels are installed on the front surface of the lens of the photoreceiver, and the attenuation rate is gradually increased by appropriately combining the filters. The boundary is measured to measure how many times the normal incident level is relative to the minimum sensitivity level.

If the adapter is attached to the light receiving surface side of the fault inspection device and the attenuation filter is attached to the adapter while changing the combination, the removal work becomes complicated and there is a risk of the lens falling. In order to improve this, an inspection instrument in which a holder and an attenuation filter are integrated and arranged in the optical axis direction is known (see Non-Patent Document 2). There, the holder-integrated attenuation filter can be individually retracted out of the optical path.

Further, there is also known an inspection instrument capable of connecting a plurality of attenuation filters integrated with a holder by a hinge mechanism and individually retracting them out of the optical path (see Non-Patent Document 3). There, a plurality of damping filters mounted on the ring-shaped holders are connected by a hinge mechanism and individually move in one direction toward the outside of the optical path.

Masaharu Ono, "Railroad Crossing Obstacle Detection Device", Railway and Electrical Technology, Japan Railway Electrical Technology Association, May 1998, Vol. 9, No. 5, p. 96-97 Osamu Yoshida, Seitsu Yamane, Naokazu Kato, Tatsuya Yamashita, "Improvement of Attenuation Filter for Laser Railroad Crossing Obstacle Detection Device", Railway and Electrical Technology, Japan Railway Electrical Technology Association, February 2011, No. Volume 22, No. 2, p. 57-58 Hirohisa Yajima, "Development of Attachments for Railroad Crossing Obstacle Detection and Damping Filters", Railway and Electrical Technology, Japan Railway Electrical Technology Association, June 2013, Vol. 24, No. 6, p. 47-48

As the fault inspection device, in addition to the normal fault inspection device (hereinafter referred to as the normal fault inspection device), a large fault inspection device for the purpose of detecting a large vehicle may be installed. The shape of the light receiver or floodlight in the fault detection device, the installation method, etc. differ depending on the type, and in some cases, the movable space of the attenuation filter is limited. Therefore, if an obstacle exists in the rotatable direction of the damping filter, the inspection work may not be possible.

Therefore, it is required for various fault inspection devices to freely move the attenuation filter out of the optical path and on the optical path.

The inspection instrument of the fault inspection device of the present invention includes a plurality of attenuation filters, a plurality of holders for holding the plurality of attenuation filters in the frame portion, and a support mechanism for supporting the plurality of holders arranged at predetermined intervals. .. At least one of the plurality of holders can rotate the plurality of attenuation filters in both directions from the center position aligned with the optical axis of the light receiver or the floodlight.

The one or more holders can be rotatable in both directions from the center position around the axis below the frame portion. For example, in a configuration in which the support mechanism comprises a shaft that supports each of the plurality of holders below the frame portion, the holders are axially rotatable around the shaft. Further, the holder may be configured to form a guide frame that defines the range of shaft rotation, and may be provided with a restricting member that passes through the guide frame. The holder can also be configured to have a knob on the top of the frame portion.

Considering the positioning of the holder at the center position, the holder may be configured to partially contact the adjacent holder at the center position. For example, a plunger protruding from the facing surface can be attached to the holder.

Considering that the light receiver of the large-scale fault inspection device has a notch, it is preferable to provide a fixing member for locking to the notch formed in the light receiver or the floodlight. Further, considering that the light receiver of the normal fault inspection device or the like has an inclined surface formed, a spacer that comes into surface contact with the inclined surface of the light receiver or the floodlight may be provided.

By providing such a fixing member or spacer, the inspection instrument 10 can stabilize the posture of the light receiver or the floodlight. From this point of view, the fixing member and the spacer can be applied to an inspection instrument having a structure in which the holder does not rotate in both directions, for example, a structure in which the holder rotates or slides in one direction. Conventionally, there is a possibility that the inspection instrument may be tilted or unstable when the attenuation filter is moved according to the type of the fault inspection device, but this can be solved.

That is, the fixing member and / or the spacer is provided with a plurality of damping filters, a plurality of holders for holding the plurality of damping filters in the frame portion, and a support mechanism for supporting the plurality of holders arranged at predetermined intervals. It is also possible to provide a equipped inspection instrument.

In the inspection method of the fault inspection device according to another aspect of the present invention, the above-mentioned inspection instrument of the fault inspection device is attached to the light receiver or the floodlight of the fault inspection device, and the attenuation filter is arranged on the optical path of the light receiver or the floodlight. While changing the combination of, measure the operating margin.

According to the present invention, various obstacle inspection devices can be easily inspected.

It is a side view of the inspection instrument which is this embodiment. It is a front view of the inspection instrument which is this embodiment. It is a top view from the top of the inspection instrument which is this embodiment. It is a photograph which attached the inspection instrument which is this Example to a light receiver of a normal obstacle inspection apparatus. It is a photograph which attached the inspection instrument which is this Example to a light receiver of a large obstacle inspection apparatus. It is a photograph which attached the inspection instrument of this Example to the light receiver of another large obstacle inspection apparatus.

Hereinafter, the inspection instrument of the obstacle inspection device according to the present embodiment will be described with reference to the drawings.

FIG. 1 is a side view of the inspection instrument according to the present embodiment. FIG. 2 is a front view of the inspection instrument according to the present embodiment. FIG. 3 is a plan view of the inspection instrument according to the present embodiment as viewed from above.

As shown in FIG. 1, the inspection instrument 10 is an attenuation filter device in which holders 30A to 30D holding the attenuation filters 20A to 20D are lined up at predetermined intervals, respectively, with respect to the receiver 110 of the obstacle inspection device installed at a railroad crossing. , Can be attached and detached. The light receiver 110 is configured here as a light receiver of a large fault inspection device, and is installed so that the optical axis CC is substantially horizontal.

The attenuation filters 20A to 20D are optical lenses that attenuate the laser beam emitted from the floodlight (not shown) of the fault detection device, and each has a different attenuation rate. Here, the attenuation factors of the attenuation filters 20A to 20D are set to 5 dB, 10 dB, 20 dB, and 30 dB, respectively. In FIG. 2, the attenuation filters 20A to 20D are omitted.

As shown in FIG. 3, the holder 30A is composed of a ring-shaped frame portion 32A for accommodating the damping filter 20A and a base portion 34A extending downward from the frame portion 32A in a rectangular shape. The center of the frame (ring) of the frame portion 32A coincides with the center C of the attenuation filter 20A. Further, the holder 30A has a shape symmetrical with respect to the vertical line CL passing through the center C. The other holders 30B to 30D are similarly configured.

The mounting portion 30E arranged next to the holder 30D is composed of the frame portion 32E and the base portion 34E (see FIG. 1) like the holders 30A to 30D, but the damping filter is not mounted and the inside of the frame portion 32E. The light that has passed through is incident on the receiver 110 as it is.

The operator brings the back surface 36E on the rear side of the mounting portion 30E into close contact with the incident surface 110S of the photoreceiver 110, and uses the bolt B to attach the plate 30F mounted near the top of the frame portion 32E of the mounting portion 30E to the photoreceiver. It is fixed to 110 (see FIGS. 1 and 2). In the following, the holder 30A side will be referred to as the front side, and the mounting portion 30E side will be referred to as the rear side.

In the holders 30A to 30D, through holes 36A to 36D are formed along the vertical line CL (see FIG. 1), and the shaft 40 is fixed to the mounting portion 30E through the through holes 36A to 36D. There is. The shaft 40 fits into the through holes 36A to 36D and supports the holders 30A to 30D together with the mounting portion 30E so as to be axially rotatable. A rubber bush 45 is interposed between the holder 30A and the end of the shaft 40.

The shaft 40 is covered with a washer 41 between the holders 30A and 30B (see FIG. 1). Similarly, the shaft 40 is covered with a washer 42 between the holders 30B and 30C, a washer 43 between the holders 30C and 30D, and a washer 44 between the holder 30D and the mounting portion 30E. (See Fig. 1).

Semi-circular guide frames 38A to 38D are formed on the base portions 34A to 34D of the holders 30A to 30D, respectively (see FIG. 3). The guide frames 38A to 38D are openings symmetrical with respect to the vertical line CL, and are formed at the same positions of the base portions 34A to 34D, respectively.

The pin (regulatory member) 50 penetrates the guide frames 38A to 38D and is fixed to the mounting portion 30E (see FIG. 1). Like the shaft 40, the pin 50 also has washers 51, 52, between adjacent holders 30A and 30B, between 30B and 30C, between 30C and 30D, and between the holder 30D and the mounting portion 30E. It is covered with 53 and 54, respectively. Further, a rubber bush 55 is interposed between the end of the pin 50 and the holder 30A.

The holders 30A to 30D can rotate around the shaft 40, and rotate in the range specified by the guide frames 38A to 38D. That is, the holders 30A to 30D can rotate around the axis from the center position in both clockwise CW and counterclockwise CCW directions. However, clockwise CW and counterclockwise CCW are specified when viewed from the front side.

Here, the center position of the holders 30A to 30D is a position where the lens center of the attenuation filters 20A to 20D is aligned with the optical axis CC of the receiver 110, that is, the optical axis of the inspection instrument 10 is aligned with the optical axis CC of the receiver 110. Represents the position. When the holders 30A to 30D are in the center position, the lens center C of the attenuation filters 20A to 20D substantially coincides with the optical axis of the receiver 110. Here, both the clockwise CW and the counterclockwise CCW can rotate around the axis within a range of 90 ° with respect to the time when the holders 30A to 30D are in the center position (see FIG. 3).

Knobs 80A to 80D are attached near the tops of the holders 30A to 30D. The operator can pinch the knobs 80A to 80D with his fingers and rotate the holders 30A to 30D from the center position to clockwise CW or counterclockwise CCW. When the holders 30A to 30D rotate 90 ° clockwise CW or clockwise CCW, the pin 50 acts as a stopper (regulatory member) and comes into contact with the guide frames 38A to 38D to limit further axial rotation.

A fixing member 60 and a spacer 70 are mounted on the rear side (receiver 110 side) of the mounting portion 30E (see FIG. 1). The fixing member 60 includes a plate 62 in contact with the back surface 36E of the mounting portion 30E and a U-shaped locking member 64 when viewed from above, and the mounting portion is in a state where the locking member 64 sandwiches the plate 62 in between. It is bolted to the back surface 36M of 30E.

A notch 110E having an arc-shaped cross section is formed in the receiver 110 of the large-scale fault inspection device along the optical axis CC. The width of the plate 62 is set to a size that allows the plate 62 to fit into the notch 110E, and the plate 62 projects toward the inside of the receiver 110 while being in contact with both edges of the notch 110E. On the other hand, the locking member 64 comes into contact with both side surfaces 120S of the light receiver 120 when the inspection instrument 10 is attached to the light receiver 120 of the ordinary fault inspection device shown by the alternate long and short dash line.

The spacer 70 is composed of a pair of plates 72 and 74 that are detachably attached with bolts to both side surfaces 36M of the attachment portion 30E. The end faces 72S and 74S of the plates 72 and 74 have an inclination angle such that when the inspection instrument 10 is attached to the light receiver 120 of the normal fault inspection device, the inspection instrument 10 comes into surface contact with the inclined surface 120M facing the inspection instrument 10. When the inspection instrument 10 is attached to the light receiver 110 of the large-scale fault inspection device, the spacer 70 may be removed.

The holders 30A to 30D are formed with holes 39A to 39D which are paired at positions symmetrical with respect to the vertical line CL (see FIGS. 2 and 3). Further, a pair of holes 39E is also formed in the mounting portion 30E. The holes 39A to 39E are formed at the same positions of the base portions 34A to 34E, respectively.

Plungers 90A to 90E such as ball plungers are inserted into the holes 39A to 39E of the holders 30A to 30D and the mounting portion 30E, and are fixed to the holders 30A to 30D and the mounting portion 30E by nuts, respectively. However, FIG. 3 does not show the plunger 90A.

As shown in FIG. 2, when the holders 30A and 30B are in the center position, they come into contact with each other between the adjacent plungers 90A and 90B, and the holders 30A and 30B are positioned at the center position. Specifically, the hemispherical or cylindrical tip portion of the plunger 90A fits into the recess formed at one end opposite to the tip portion of the plunger 90B. The other adjacent plungers 90B and 90C, the plungers 90C and 90D, and the plungers 90D and 90E are also in contact in the same manner.

Using such an inspection tool 10, the operator measures the operating margin. When the operator attaches the inspection instrument 10 to the light receiver 110 of the large fault inspection device or the light receiver 120 of the normal fault inspection device, the worker first arranges the attenuation filter 20D having the largest attenuation factor at the center position, and then attenuates the other parts. The filters 20A to 20C are rotated by 90 ° so as to retract out of the optical path. It is confirmed whether the light receiver 110 can receive light while the light is emitted from the floodlight.

Next, the attenuation filter 20C having the second largest attenuation factor is arranged on the optical path to check the light receiving state. Then, the attenuation filters are arranged on the optical path of the combined attenuation filters so that the attenuation factors gradually increase, and the light receiving state is confirmed. During that time, the operator performs the work while appropriately rotating the holders 30A to 30D in a direction in which obstacles and the like do not exist.

In the present embodiment, the attenuation filters 20A to 20D of the inspection instrument 10 can rotate around the axis from the center position to the outside of the optical path in both clockwise CW and counterclockwise CCW directions, respectively. As a result, if an obstacle such as a support is present near the fault inspection device 10, the attenuation filter is appropriately rotated in a direction avoiding it, and the light receivers 110 and 120 of either the large fault inspection device or the normal fault inspection device can be used. On the other hand, it is possible to inspect the operation margin.

When the inspection instrument 10 is attached to the light receiver 110, the holders 30A to 30D are installed in a state where the center line CL thereof is along the vertical direction. Since the holders 30A to 30D have a symmetrical shape with respect to the center line CL, the position of the center of gravity thereof is located near the center line CL. Therefore, even with the support structure by the shaft 40, the holders 30A to 30D can be stably supported, and the attenuation filters 20A to 20D can be maintained in the horizontal direction (here, the optical axis direction of the receiver 110).

Further, the holders 30A to 30D employ a support structure in which the holders 30A to 30D are rotatably supported by a shaft 40 located below the frame portions 32A to 32D. Therefore, even if the holders 30A to 30D are made of metal and are heavy, the operator can move the holders 30A to 30D so as to tilt them out of the optical path, and no force is required. Further, by attaching the knobs 80A to 80D near the tops of the holders 30A to 30D, the operator can rotate the holders 30A to 30D simply by pinching one of the knobs with his fingers. A structure other than the shaft 40 may be used to support the holders 30A to 30D.

The range of axial rotation of the holders 30A to 30D is regulated by the guide frames 38A to 38D formed on the holders 30A to 30D. Unlike the conventional technique, the holders 30A to 30D are not configured to have a pin or the like for defining the movement around the frame portions 32A to 32D, so that the rotation work is not troublesome. Further, by using the pin 50 as a stopper, the holders 30A to 30D retracted to the outside of the optical path can be reliably held at a predetermined angle (here, 90 °). The guide frames 38A to 38D may be formed so as to rotate the axis at an angle other than 90 ° under the condition that the attenuation filters 20A to 20D are retracted to the outside of the optical path.

Plungers 90A to 90E are attached to the holders 30A to 30D and the mounting portion 30E, and when the adjacent holders are in the center position, the adjacent plungers come into contact with each other. As a result, when the operator rotates the holders 30A to 30D toward the center position, it can be confirmed by the touch of the hand (fingers) that the holders 30A to 30D have reached the center position, and the holders 30A to 30D can be accurately centered. Can be positioned with. It should be noted that a member other than the plunger may be used so as to partially contact the adjacent holders at the center position.

When any or more of the holders 30A to 30D are rotated by 90 ° to the outside of the optical path, a force acts in the direction of tilting the inspection instrument 10 from the center position due to the movement of the center of gravity. However, since the plate 62 of the fixing member 60 provided on the inspection instrument 10 is in contact with the notch 110E of the light receiver 110 of the large fault inspection device so as not to move, the inspection instrument 10 is tilted. It can be stably held at the center position. Further, the fixing member 60 also functions as a fixing device for the light receiver 120 of the normal fault inspection device 10 together with the plate 62.

The light receiver 120 of the ordinary fault inspection device is formed with an inclined surface 110 facing the inspection instrument 10. Since the spacers 72 and 74 of the inspection instrument 10 have end surfaces 72S and 74S that match the angle of the inclined surface 120, they come into surface contact with each other, so that a gap is created between the mounting portion 30E and the inclined surface 120. The inspection instrument 10 can be stably held even with respect to the light receiver 110.

It should be noted that only a part of the damping filters 20A to 20D (for example, only the damping filters 20A and 20B) may be axially rotated from the center position in both directions. It is also possible to install the inspection instrument 10 on a normal fault inspection device or a floodlight of a large fault inspection device.

Hereinafter, examples of the inspection instrument according to the present embodiment will be described.

FIG. 4 is a photograph in which the inspection instrument of this embodiment is attached to a light receiver of a normal obstacle inspection device. FIG. 5 is a photograph in which the inspection instrument of this embodiment is attached to a light receiver of a large-scale obstacle inspection device. FIG. 6 is a photograph in which the inspection instrument of this embodiment is attached to a light receiver of another large-scale obstacle inspection device.

As shown in FIG. 4, the inspection instrument is reliably positioned at the center position. Further, as shown in FIGS. 5 and 6, the holder can be axially rotated in a direction avoiding a support column in the vicinity of an obstructive receiver.

10 Inspection instrument 20A to 20D Attenuation filter 30A to 30D Holder 30E Mounting part (support mechanism)
32A-32E Frame part 34A-34E Base part 40 Shaft (support mechanism)
50 pins (regulatory member)
60 Fixing member 62 Plate 70 Spacer 80A-80D Knob 90A-90E Plunger 110 Receiver for large fault inspection device 120 Receiver for normal fault inspection device

Claims (10)

With multiple attenuation filters,
A plurality of holders that house and hold the plurality of attenuation filters in the frame portion, respectively.
It is equipped with a support mechanism that supports the plurality of holders arranged at predetermined intervals.
An inspection instrument for a fault inspection device, wherein at least one of the plurality of holders can rotate the plurality of attenuation filters in both directions from a central position aligned with the optical axis of a light receiver or a floodlight. The inspection instrument for a fault inspection device according to claim 1, wherein the holder can rotate in both directions from a center position about an axis below the frame portion. The support mechanism comprises a shaft that supports each of the plurality of holders below the frame portion.
The inspection instrument for a fault inspection device according to claim 1 or 2, wherein the holder is rotatable around the shaft. The holder has a guide frame that defines a range of shaft rotation.
The inspection instrument of the obstacle inspection device according to any one of claims 1 to 3, further comprising a regulating member that passes through the guide frame. The inspection instrument for a failure inspection device according to any one of claims 1 to 4, wherein the holder partially contacts an adjacent holder at a central position. The inspection instrument for a failure inspection device according to claim 5, wherein a plunger protruding from the facing surface is attached to the holder. The inspection instrument for a failure inspection device according to any one of claims 1 to 6, wherein the holder is provided with a knob on an upper portion of the frame portion. The inspection instrument for a failure inspection device according to any one of claims 1 to 7, further comprising a fixing member for locking to a notch formed in the light receiver or the floodlight. The inspection instrument of the fault inspection device according to any one of claims 1 to 8, further comprising a spacer that comes into surface contact with the inclined surface of the light receiver or the floodlight. The inspection instrument of the failure inspection device according to any one of claims 1 to 9 is attached to a light receiver or a floodlight of the failure inspection device.
A method for inspecting a fault inspection device, which comprises measuring the operating margin while changing the combination of attenuation filters arranged on the optical path of a light receiver or a floodlight.

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