Distance measuring device for platform doors

Abstract

To provide a measurement device that enables a simple check on a platform door not being installed on an interior side of a construction limit, and to make it possible to manufacture the measurement device inexpensively.SOLUTION: In a platform door-purpose distance measurement device 5, which measures a distance to rail-way tracks 4a and 4b about a platform door 2 installed in a rail-way station platform 1 of a rail way, the distance measurement device has: a dolly 6 that is movable on the rail-way tracks 4a and 4b; and a distance check-purpose member 18 that is attached to the dolly 6. The platform door 2 is provided on a platform side further than a construction limit line G, and an end face 18b on the platform side of the distance check-purpose member 18 extends in a vertical direction along an end face (an end face of an obstacle sensor box 3) on the rail-way track side of the platform door 2. The closest point to the platform door out of the end face 18b on the platform side of the distance check-purpose member 18 exists on a construction limit line G.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a distance measuring device for platform doors that measures the distance between a platform door installed on a platform at a railway station and a track. [Background technology]

[0002] A construction gauge has long been established for structures and buildings installed on platforms. This construction gauge is the range in relation to the tracks within which buildings and other structures may not be installed. In recent years, it has become common to install platform screen doors as structures on platforms. These platform screen doors, too, must not be installed inside the construction gauge (i.e., on the track side of the construction gauge).

[0003] An obstacle sensor for detecting the presence of a foreign object, for example, may be provided on the track side of the platform door. In this case, an obstacle sensor box that surrounds this obstacle sensor is present on the track side of the platform door. If there is a protrusion such as an obstacle sensor box on the track side of the platform door, it is necessary to check the distance from the track side end face of the protrusion, such as the obstacle sensor, to the track so that the track side end face of the platform door does not fall inside the construction gauge. In general, it is necessary to check the distance from the center of the track to the protrusion.

[0004] Conventionally, as shown in Fig. 9, the distance between an end face 103a of an obstacle sensor box 103 of a platform door 102 installed on a platform 101 and a center line 104c of tracks 104a, 104b has been obtained by triangulation using a triangulation device 105. Although triangulation allows for highly accurate measurements, it has the following drawbacks. (1) Measuring instruments need to be installed and adjusted at each measurement point, which is time-consuming. (2) Multiple workers are required. (3) Professional engineers with surveying skills are required.

[0005] Furthermore, Patent Documents 1 and 2 disclose distance measuring devices for platform doors that use a laser displacement sensor, a laser scanner sensor, a laser oscillator, and a camera. However, laser displacement sensors and laser scanner sensors are expensive. And measuring devices that use a laser oscillator and a camera are very large. For these reasons, conventional distance measuring devices for platform doors that use a laser scanner sensor or the like are large and expensive. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2008-107291 A [Patent Document 2] JP 2012-017989 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of the above-mentioned problems with conventional devices, and has as its first object to provide a measuring device that can easily check that platform screen doors are not installed inside the construction gauge. Also, as a second object, it is to make it possible to manufacture the measuring device inexpensively. [Means for solving the problem]

[0008] The distance measuring device for platform doors according to the present invention is a distance measuring device for platform doors that is installed on a platform at a railway station and measures the distance to a track for a platform door, and the device has a carriage that is movable on the track, a support pillar provided on the carriage, and a distance confirmation member provided on an upper portion of the support pillar, and the distance confirmation member has a first branch portion that extends upward from the support pillar, and a distance confirmation member that is spaced apart from the first branch portion by a predetermined width. Paralleland a second branch portion provided on an upper portion of the platform door, the outer surface of the second branch portion being a confirmation surface, the platform door is provided on the platform side of the building limit line, the support pillar is disposed on the track side of the building limit line when the bogie is placed on the track and extends in the vertical direction facing the track side tip of the platform, the confirmation surface is disposed facing an end face of the track side overhanging part of the platform door, the confirmation surface extends in the vertical direction along the end face of the track side overhanging part of the platform door, a point of the confirmation surface closest to the platform door exists on the building limit line, the distance confirmation member is detachable from an upper portion of the support pillar, and an attachment surface for fixing the first branch portion of the distance confirmation member is provided on the upper portion of the support pillar. There are It is characterized by:

[0009] Generally, tracks may have an inclination due to environmental conditions such as cant. In this case, the end face of the distance confirmation member may be inclined relative to the platform door. When the end face of the distance confirmation member is inclined in this way, it is sufficient that the point of the end face closest to the platform door is on the construction limit line.

[0010] This distance measuring device for platform doors makes it possible to easily and quickly confirm the position of the platform door relative to the construction limit line by comparing the end face of the distance confirmation component on the platform side (i.e., the confirmation surface) with the end face of the platform door.

[0011] In a second aspect of the invention of the distance measuring device for platform doors of the present invention, the platform doors have a sensor for detecting an obstacle present between the platform doors and the track, and an obstacle sensor box incorporating the sensor, and the end face of the track side protrusion of the platform doors is the track side end face of the obstacle sensor box.

[0012] This aspect of the invention specifies an example of which part of the platform door is the measurement point of the measurement object. That is, in this aspect of the invention, the obstacle sensor box, which is one of the components of the platform door, is the part that protrudes most toward the track, and therefore this obstacle sensor box is the measurement object.

[0013] In the distance measuring device for platform doors of the present invention, the distance confirmation member is attachable and detachable to the upper part of the support pillar. For structures installed on railway platforms, construction gauges are set in relation to the tracks. These construction gauges determine the distance range in relation to the tracks within which structures must not be installed. The construction gauge values ​​are set by each railway company. If the distance confirmation parts are made detachable from the bogie, it is possible to meet the requirements of each railway company with a single bogie.

[0014] Another aspect of the distance measuring device for platform doors of the present invention has a laser measuring device attached to the distance confirmation member so as to face the platform doors, and the laser measuring device has a light-emitting element that emits laser light toward a measurement point on the end face of the platform doors on the track side, a light-receiving element that receives the laser light reflected at the measurement point and outputs a signal, and a measuring device door-to-door distance calculation means that calculates the distance between the laser measuring device and the measurement point (= measuring device door-to-door distance D2) based on the output signal from the light-receiving element, and further, this distance measuring device for platform doors is characterized in having a track door-to-door distance calculation means that calculates the distance of the platform doors to the track (= track door-to-track distance D3) based on the output signal of the measuring device door-to-door distance calculation means.

[0015] In general measurements of platform screen doors, it is often necessary to determine the distance of the platform screen doors from the track centerline. The laser measuring device used in the present invention is an inexpensive device that is primarily intended for measuring short distances, and is therefore not suitable for directly measuring platform screen doors that are located a long distance from the track centerline. However, the above requirement can be met by recalculating the output signal of the laser measuring device using a track door distance calculation means.

[0016] According to yet another aspect of the present invention, the distance measuring device for platform doors adjusts the mounting position of the distance confirmation member or the laser emission position of the laser measuring device based on the distance data (distance D3 between track doors) calculated by the track door distance calculation means and the distance data actually measured using triangulation. According to this aspect of the invention, accurate distance data can be obtained by the distance measuring device for platform doors.

[0017] Yet another aspect of the distance measuring device for platform doors according to the present invention comprises a bogie movement distance measuring means for measuring the distance traveled by the bogie on the track, and a track door distance calculation means for determining the relationship between the distance traveled by the bogie and the distance of the platform doors from the track based on the distance data calculated by the track door distance calculation means and the distance data measured by the bogie movement distance measuring means.

[0018] In the above configuration, the bogie travel distance measuring means can be realized by, for example, a combination of the encoder 16 in Fig. 1 and the bogie travel distance calculation unit 31 in Fig. 6. According to this aspect of the present invention, distance information of the platform door along the track can be obtained.

[0019] In yet another aspect of the distance measuring device for platform doors according to the present invention, a plurality of (e.g., three) laser measuring devices are provided vertically on the distance confirmation member, and the reference points (P1) for laser emission and laser reception of these laser measuring devices are at the same position in the horizontal direction and at different positions in the vertical direction. According to this aspect of the invention, detailed distance data from the track center to the platform doors can be obtained.

[0020] Another aspect of the distance measuring device for platform doors according to the present invention has a carriage fixing means for fixing the carriage immovably on the track. The specific structure of the carriage fixing means can be determined arbitrarily. According to this aspect of the invention, the distance confirmation member can be made stationary in front of the platform doors, so that the distance confirmation work using the distance confirmation member and the distance measurement work using a laser measuring device can be performed accurately. Effect of the Invention

[0021] According to the distance measuring device for platform doors of the present invention as recited in claim 1, the position of the platform door relative to the construction limit line can be easily and quickly confirmed by comparing the end face of the distance confirmation member on the platform side (i.e., the confirmation surface) with the end face of the platform door on the track side. [Brief description of the drawings]

[0022] [Figure 1] 1 is a side view showing one embodiment of a distance measuring device for platform doors according to the present invention. FIG. [Diagram 2] FIG. 2 is a plan view of the distance measuring device for platform doors shown in FIG. 1. [Diagram 3] This is an oblique view showing an example of a platform door. [Figure 4] 2 is a block diagram showing an internal configuration of an example of a laser measuring instrument which is a main device in FIG. 1. [Diagram 5] FIG. 2 is an enlarged view of the area near the platform door in FIG. 1. [Figure 6] 2 is a block diagram showing an internal configuration of an example of a control device which is a main device in FIG. 1. [Figure 7] FIG. 2 is a diagram showing the dimensions of each part of the distance measuring device for platform doors in FIG. 1 when the device is in a non-canted state. [Figure 8] 2 is a diagram showing the dimensions of each part of the distance measuring device for platform doors in FIG. 1 when it is in a canted state. [Figure 9] FIG. 1 is a diagram showing triangulation conventionally used in distance measurement; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The distance measuring device for platform doors according to the present invention will be described below based on an embodiment. It is needless to say that the present invention is not limited to this embodiment. In addition, in the drawings attached to this specification, components may be shown at different ratios from the actual ones in order to easily show characteristic parts.

[0024] Fig. 1 shows a side view of one embodiment of a distance measuring device for platform doors according to the present invention. Fig. 2 shows a plan view of the distance measuring device for platform doors in Fig. 1. Fig. 1 is a cross-sectional view taken along line CC in Fig. 2. In these figures, tracks 4a and 4b are laid in the direction penetrating the plane of Fig. 1 (i.e., in the vertical direction of the plane of Fig. 2). Platform 1 is installed parallel to tracks 4a and 4b. Platform doors 2 are installed above platform 1.

[0025] (Platform doors) As shown in Fig. 3, the platform door 2 has an enclosure 10, a door 11, and an obstacle sensor box 3 as a structure that protrudes towards the track. The door 11 can move to open in the direction of arrow A in Fig. 3, and can also move to close in the direction of arrow B. The door 11 that opens in the direction of arrow A is stored inside the enclosure 10. The space formed by the door 11 opening and moving becomes a passageway for people.

[0026] In this embodiment, two types of obstacle sensor boxes 3, one 3a having a long vertical length and one 3b having a short vertical length, are attached to the track side surfaces of different enclosures 10 as necessary.

[0027] A light-emitting element (not shown) is provided inside one of the obstacle sensor boxes 3. A light-receiving element (not shown) is provided inside the other obstacle sensor box 3. The light-emitting element and the light-receiving element form a sensor. When a foreign object is present near the door 11, the presence of the foreign object can be detected by this sensor. The detection system provided inside the obstacle sensor box may be a three-dimensional sensor or the like arranged inside one of the obstacle sensor boxes. In this case, the other obstacle sensor box may be arranged as a dummy. Various shapes of obstacle sensor boxes may be adopted.

[0028] Generally, the track-side end face of the structure (obstruction sensor box 3 in this embodiment) that projects onto the track side of the platform doors 2 must not extend further inward than the construction limit line G in Figure 1. The construction limit is the range within which buildings and other structures must not be installed relative to the track. The construction limit line G is the boundary line of this construction limit. As the platform doors 2 are in principle positioned in a vertical direction relative to the horizontal direction, the construction limit line G appears as a line parallel to the track-side end face of the platform doors 2. The construction limit is determined by each railway company.

[0029] (Trolley) In Figure 1, a distance measuring device for platform doors, generally designated by the reference numeral 5, has a bogie 6. The bogie 6 rests on tracks 4a and 4b. The bogie 6 has a frame 7 extending horizontally, and a support member 8 attached to the frame 7. The support member 8 is a long, rod-shaped member with a square cross-section. The rear end of the support member 8 is fixed to the frame 7, and its tip is bent to form a support pillar 9. The support pillar 9 extends at a right angle to the frame 7 in Figure 1 (upwards in Figure 1). Reference numeral 12 denotes a reinforcing member.

[0030] In Fig. 2, wheels 15 are provided at the four corners of the frame 7. In Fig. 1, each wheel 15 is placed on the tracks 4a, 4b. When a person pushes the cart 6 along the tracks 4a, 4b, the wheels 15 roll on the tracks 4a, 4b, and the cart 6 moves parallel to the platform 1 in the direction of the arrow E-E' in Fig. 2. At least one of the wheels 15 is provided with an encoder 16. The encoder 16 outputs a pulse signal in response to the rotation of the wheels 15.

[0031] Above one of the tracks 4b, a carriage fixing device 17 is provided on the frame 7. The carriage fixing device 17 is a device for fixing the carriage 6 to the track 4b in an immovable position. The carriage fixing device 17 can be configured with any structure. For example, the carriage fixing device 17 can be configured by a combination of a gripping member (not shown) that can be opened and closed, a drive mechanism (not shown) that drives the gripping member to open and close, a drive source (not shown) such as a motor or air cylinder that operates the drive mechanism, and a switch (not shown) that supplies electricity to the drive source. By operating the switch from a slightly distant location using an appropriate member (for example, a rod-shaped member) to operate the drive source, the frame 7, and therefore the carriage 6, can be fixed in an immovable position on the tracks 4a, 4b by firmly gripping the track 4b with the gripping member. This fixing measure for the carriage 6 is intended to realize stable measurement.

[0032] (Distance checking parts) In Fig. 1, a distance confirmation member 18 is detachably attached to a support 9 of a bogie 6 by a fixing element 13 such as a bolt. The distance confirmation member 18 is in the form of a bent rod-shaped member with a rectangular cross section, as shown in the pull-out reference diagram (A) of Fig. 1. An inner edge surface 18a of the lower part of the branch part on the track side of the distance confirmation member 18 is the attachment surface to the support 9. An outer edge surface 18b of the branch part on the platform 1 side of the distance confirmation member 18 is the confirmation surface. The confirmation surface 18b is an edge surface for confirming whether the track side end face of the obstacle sensor box 3 (i.e., the track side protrusion part of the platform door 2) does not intrude inside (the track side) of the building limit line G.

[0033] In this embodiment, the distance D0 between the center line X0 of the tracks 4a and 4b and the confirmation surface 18b of the distance confirmation member 18 (=distance between the track confirmation surfaces) is set so that the confirmation surface 18b is on the building limit line G when the cart 6 is placed on the tracks 4a and 4b. Note that "on the line" means that even if it is not exactly on the line, it also includes the case where it is slightly off the line due to manufacturing errors or assembly errors of parts. Such an error is, for example, within the range of ±20 mm, preferably within the range of ±10 mm, and more preferably within the range of ±5 mm.

[0034] With this configuration, with the bogie 6 placed on the tracks 4a, 4b, an operator can visually check the distance between the confirmation surface 18b of the distance confirmation member 18 and the track-side end edge of the obstacle sensor box 3, making it easy to determine whether the track-side protruding end face of the platform door 2 is in a correct position with respect to the building limit line G. Note that since the installation standards for platform doors differ from one railway company to another, distance confirmation member 18, including the bogie 6, is created for each railway company to accommodate this.

[0035] In order to improve the accuracy of the above judgment, the mounting side surface 18a of the distance confirmation member 18 to the support 9 and the confirmation surface 18b are processed to have precise parallelism with each other. In addition, the mounting side surface 18a and the confirmation surface 18b are subjected to precise surface processing. Due to the parallelism processing and surface processing, the confirmation surface 18b is perpendicular to the line segment F between the tracks 4a and 4b (i.e., the line connecting the vertices of the upper parts of the tracks).

[0036] In addition, in order to improve the accuracy of the above-mentioned judgment, each element of the distance between the track center line X0 and the mounting surface 9a of the support 9, the surface accuracy of the mounting surface 9a, the surface accuracy of the mounting edge surface 18a of the distance confirmation member 18, the width W between the branches of the distance confirmation member 18, and the surface accuracy of the confirmation surface 18b of the distance confirmation member 18 are finished with great precision.

[0037] (Laser measuring device) 1 and 2, a flat mounting plate 21a is attached to the upper part of the side surface of the distance confirmation member 18. A flat mounting plate 21b is attached to the lower part of the side surface of the distance confirmation member 18. A first laser measurement device 22a is fixed to the mounting plate 21a, a second laser measurement device 22b is fixed to the upper part of the mounting plate 21b, and a third laser measurement device 22c is fixed to the lower part of the mounting plate 21b.

[0038] As shown in FIG. 4, each of the laser measuring instruments 22a, 22b, and 22c includes a laser emitting element 23, a laser receiving element 24, a measuring instrument door distance calculation unit 25, and a power supply 26. The laser emitting element 23 emits a laser beam when it receives a predetermined trigger signal Tr. This laser beam is reflected at the measuring point P0. The reflected laser beam is received by the laser receiving element 24. At this time, a light receiving signal S1 is output. The measuring instrument door distance calculation unit 25 calculates the distance (= measuring instrument door distance) D2 between the measuring reference point P1 and the measuring point P0 of the measuring instruments 22a, 22b, and 22c based on the trigger signal Tr and the light receiving signal S1. The measuring reference point P1 is a reference point for laser emission and laser reception, and may be the laser emission point itself or the laser reception point itself. The measuring instrument door distance calculation unit 25 outputs the calculated distance data as a signal S2.

[0039] The laser measuring devices 22a, 22b, and 22c used in this embodiment realize the above functions, and although their functions are limited compared to sensing devices used in conventional measuring devices (i.e., sensing devices using laser displacement sensors, laser scanner sensors, laser oscillators, and cameras), they are extremely inexpensive. The measuring device-door distance calculation unit 25 may be configured using a computer, or may be configured using an electronic circuit without a computer.

[0040] An essential function of such an inexpensive laser measuring device is to calculate the short linear distance D2 in FIG. 4 and output the distance data as an electric signal or display the distance data as an image. Although the device shown in FIG. 4 only outputs a signal to the outside, a device that displays an image to the outside is also conceivable. In such a device, a display device such as a liquid crystal display is provided in the laser measuring device 22a, 22b, 22c. A device that does not output the distance data signal S2 to the outside and only displays the distance data as an image is also conceivable. In such a device, an operator visually reads the displayed distance and inputs the read data into a computer using an input device such as a keyboard, and the distance from the track center to the platform door can be calculated using a calculation application (e.g., spreadsheet software) preinstalled in the computer.

[0041] In FIG. 5, the measurement reference points P1 of the three laser measuring instruments 22a, 22b, and 22c are at the same position in the horizontal direction and different positions in the vertical direction. The measurement point P0 of the first laser measuring instrument 22a is a position corresponding to the upper top of the long obstacle sensor box 3a and the upper top of the short obstacle sensor box 3b. The measurement point P0 of the second laser measuring instrument 22b is a position corresponding to the lower top of the short obstacle sensor box 3b. The measurement point P0 of the third laser measuring instrument 22c is a position corresponding to the lower top of the long obstacle sensor box 3a. The number of laser measuring instruments and the vertical installation positions of the multiple laser measuring instruments are appropriately selected depending on which part of the platform door 2 the measurement point P0 is to be set at.

[0042] As is clear from the above, the laser measuring instruments 22a, 22b, and 22c measure the linear distance from the measurement reference point P1 to the measurement point P0 of the platform door 2. Taking into consideration tolerances, etc., the measurement point P0 is located near the upper and lower tops of the obstacle sensor boxes 3a and 3b. In this embodiment, since there are two types of obstacle sensor boxes, the long obstacle sensor box 3a and the short obstacle sensor box 3b, the measurement point P0 is also set at the intermediate position between the upper measurement point P0 and the lower measurement point P0. In this embodiment, the laser measuring instruments 22a, 22b, and 22c are provided on the distance confirmation member 18, so that the actual measurement distances of these measuring instruments are short.

[0043] In this embodiment, three laser distance meters GLM500 manufactured by BOSCH are used as the laser measuring instruments 22a, 22b, and 22c. The mounting positions of two of the three can be changed. The price of this laser distance meter is about 16,000 yen per unit, which is very inexpensive. In contrast, sensing devices that have been used conventionally, that is, sensing devices using laser displacement sensors, laser scanner sensors, laser oscillators, and cameras, are multifunctional but very expensive, ranging from about 1 million yen to several million yen. Thus, according to this embodiment, the distance measuring device 5 for platform doors can be manufactured at low cost.

[0044] In this embodiment, the actual measurement data from the laser measuring instruments 22a, 22b, and 22c is not distance data relative to the orbit center X0. Therefore, when distance data from the orbit center X0 is required, the distance data from the orbit center X0 is calculated based on a predetermined formula.

[0045] (Control device) 1 and 2, a control device 29 is provided on the frame 7. In FIG. 6, the control device 29 has a track door distance calculation unit 30, a carriage movement distance calculation unit 31, and a track door distance calculation unit 32. Each of these calculation units is realized by an arithmetic processing unit of a computer. The control device 29 has a memory 33. The memory 33 stores data sent from the encoder 16 and the laser measuring devices 22a, 22b, and 22c as necessary, stores program software for performing measurements, and stores data in the middle of calculation as necessary.

[0046] The output signal of the encoder 16 in Fig. 1 and the output signals of the laser measuring instruments 22a, 22b, 22c are taken into the control device 29 via the input / output interface 34a in Fig. 6. A display device 35 and a printer 36 are connected to the control device 29 via the input / output interface 34b. The display device 35 is, for example, a liquid crystal display device, and displays the results of the calculations of the various calculation means as images. The printer 36 prints the results of the calculations of the various calculation means as visible images as necessary. An input device 37 is connected to the control device 29 via the input / output interface 34c. The input device 37 is, for example, a keyboard. When it is desired to input any electronic data to the control device 29, the input is made using this input device 37.

[0047] The display device 35, the printer 36, and the input device 37 may be provided integrally with the control device 29 in Fig. 1, or may be provided at a location remote from the control device 29. When the display device 35 and the like are provided at a location remote from the control device 29, various data can be transmitted by wireless communication.

[0048] The track door distance calculation unit 30 receives output data from the measuring device door distance calculation unit 25 in the laser measuring devices 22a, 22b, 22c in Figure 4 (i.e., electronic data indicating the measuring device door distance D2 in Figure 1), and calculates the distance (= track measuring device distance) D3 from the track center X0 to the measurement point P0 of the platform door 2 by adding the distance (= track measuring device distance) D1 between the track center X0 and the measuring device reference point P1 (see Figures 4 and 5) to this D2 data.

[0049] In addition, in Fig. 4, there is a case where a display device is provided to the laser measuring devices 22a, 22b, 22c and the distance data signal S2 is not output to the outside. In this case, the operator can confirm the distance on the display device and input the distance data to the control device 29 via the input device 37 in Fig. 6, and the necessary arithmetic processing can be performed on this input distance data.

[0050] The bogie travel distance calculation unit 31 in Fig. 6 receives the output signal (i.e., the rotation speed signal of the wheels 16) of the encoder 16 in Fig. 1, and calculates the travel distance of the bogie 6 on the tracks 4a, 4b based on this output signal. The track-along-door distance calculation unit 32 receives the travel distance data of the bogie 6 which is the calculation result by the bogie travel distance calculation unit 31, and the distance from the track center line X0 to the obstacle sensor box 3 (= the overhanging part of the platform door 2) which is the calculation result by the track door distance calculation unit 30, and tallies up the distance to the obstacle sensor box 2 for each position of the bogie moving on the track.

[0051] (Distance confirmation operation) Since the distance measuring device 5 for platform doors of this embodiment is configured as described above, an operator first prepares a distance confirmation member 18 that complies with the standards of the railway company in Figs. 1 and 2. Then, this distance confirmation member 18 is attached to the upper part of the support pillar 9 of the bogie 6. Next, the wheels 15 of the bogie 6 are placed on the tracks 4a, 4b. Next, the operator pushes the bogie 6 by hand to move the bogie 6, and therefore the distance confirmation member 18, in parallel along the platform doors 2 in front of the platform doors 2.

[0052] In this embodiment, the installation position of the platform door 2 is determined as follows. That is, the platform door 2 is installed on the platform 1 so that the distance from the track center X0 to the obstacle sensor box 3 (i.e., the structure of the platform door 2 that protrudes most toward the track side) is within the "construction limit (e.g., 1550 mm) + margin (e.g., 20 mm)". Therefore, if there is no error in the installation position of the platform door 2, a gap (= space) of the margin is formed between the confirmation surface 18b of the distance confirmation member 18 and the obstacle sensor box 3. Therefore, by confirming that there is a gap between the confirmation surface 18b and the obstacle sensor box 3, it can be confirmed that the platform door 2 is correctly positioned on the platform side of the construction limit line G.

[0053] The worker moves the cart 6 from the front end to the back end of the platform 1 and checks that the confirmation surface 18b of the distance confirmation member 18 does not come into contact with any part of the platform door 2. If contact is confirmed, appropriate measures are taken with respect to the platform door.

[0054] (Distance measurement operation) In Fig. 1, when measuring the distance from the track center line X0 to the measurement point P0 of the platform door 2, the worker first pushes the cart 6 by hand to move the cart 6 to the target measurement point P0. Then, the worker activates the cart fixing device 17 to fix the cart 6 in an immovable position relative to the tracks 4a and 4b.

[0055] Next, the worker activates the necessary measuring device among the laser measuring devices 22a, 22b, and 22c in Fig. 1. The activated laser measuring devices 22a, 22b, and 22c irradiate laser light to the measuring point P0 in Fig. 4. At this time, the measuring device door-to-door distance calculation unit 25 calculates the distance D2 between the reference point P1 of the measuring devices 22a, 22b, and 22c and the measuring point P0 of the other side (= measuring device door-to-door distance) based on the light receiving signal S2. The distance data that is the calculation result is output as a measuring device door-to-door distance data signal S2.

[0056] The output distance data signal S2 is transmitted to the control device 29 in Fig. 6. The control device 29 adds the track measuring device distance D1 in Fig. 1 to the received data of the measuring device door distance D2 by the operation of the track door distance calculation unit 30. This addition calculation process obtains the track door distance D3 in Fig. 1. The obtained track door distance data is stored in the memory 33 as required, displayed on the display device 35 as required, or printed by the printer 36 as required.

[0057] (Adjustment of distance confirmation parts) As shown in Fig. 9, a triangulation device is installed at an appropriate position on the track, and highly accurate distance measurement can be performed by triangulation. For at least one of the measurement points P0 of the laser measuring devices 22a, 22b, and 22c, the mounting position of the distance confirmation member 18 and the laser emission position of the laser measuring device can be adjusted so that the accurate distance data obtained by triangulation and the actual measurement data obtained by the laser measuring device are the same. This can improve the reliability of the measurement data obtained by the distance measuring device for platform doors of this embodiment.

[0058] (Counting operation) While moving the bogie 6 intermittently at a predetermined interval on the tracks 4a, 4b, the worker can obtain the track door distance D3 in Fig. 1 using the laser measuring devices 22a, 22b, 22c at each position. This allows the values ​​of the track door distance D3 (see Fig. 1) at different positions of the laser measuring devices 22a, 22b, 22c along the tracks 4a, 4b to be compiled in the memory 33 in Fig. 6. This allows the overhanging condition of the platform screen doors 2 toward the track side between the ends of the platform 1 along the tracks 4a, 4b to be confirmed.

[0059] (Specific examples) When measurements were taken using the platform door distance measuring device 5 in Figure 1, the condition of the platform door 2 being measured was as follows. In FIG. 7, the unit is mm. (1) Distance from the track center to the obstacle sensor box L1 = 1570 (2) Margin L2=20 (3) Construction limit L3=1550 (4) Measuring instrument door distance L4 = 55 (5) Distance of laser emission position L5 = 1495 (6) Orbit distance L6=686 (7) Orbit distance L7=686 (8) Distance between track supports L8=714 (9) Distance from the center of the track to the end of the support pillar L9 = 1400 (10) Track width (inside) L10=1372 (11) Platform door height H1 = 1,300 (12) Short and long obstacle sensor box top height H2 = 1094.7 (13) Height of bottom of short obstacle sensor box H3=350 (14) Height of bottom of long obstacle sensor box H4=45 (15) Platform height from orbit H5 = 1090 (16) Height of the reference point of the first laser measuring instrument H6 = 2092.3 (17) Height of the reference point of the second laser measuring instrument H7 = 1550 (18) Height of the reference point of the third laser measuring instrument H8 = 1245 (19) Height to bottom of distance confirmation component H9 = 1190

[0060] (Kant's Considerations) Cant refers to raising the track on the outside of a curve and lowering the track on the inside of the curve when the track is curved. In other words, cant refers to tilting track surface F formed by the apex of track 4a and the apex of track 4b in Figure 1 so that the outside is higher. This cant is intended to prevent a vehicle from derailing to the outside of the track due to the centrifugal force acting on the vehicle when it travels around a curve. Like the construction gauge, cant is something that is determined by each railway company.

[0061] The explanations so far in this specification have been based on the assumption that no cant occurs in the tracks 4a, 4b in Figure 1. In other words, the track surface F is a horizontal surface. However, cant may occur in an actual track. Figure 8 shows the state of a distance measuring device for platform doors when a cant occurs. In the figure, the distance measuring device for platform doors shown by the dashed line is a distance measuring device for platform doors in a state without cant, and the distance measuring device for platform doors shown by the solid line is a distance measuring device for platform doors in a state with cant.

[0062] In FIG. 8, the unit is mm. (1) Horizontal distance from the track center to the laser measuring instrument (without cant) L50 L50=1495 (fixed value) (2) The vertical distance from the tilt reference point to the laser measuring device (laser emission point) H51=2092.3, H52=1550, H53=1245 (3) Shortest distances L51, L52, and L53 from the tilt reference point to the laser measuring instrument TIFF0007672833000001.tif47146(4) Angle of inclination due to cant α=tan-1(cant / inner track width) (5) Angle from tilt reference point to laser measuring instrument (rad) = β1, β2, β3 β1=tan-1(H51-orbit inner width / 2) β2=tan-1(H52-orbit inner width / 2) β3=tan-1(H53-orbit inner width / 2) (6) Horizontal distance from the center of the track to the laser measuring device (including cant) L54=L51×COS(β1-α)+orbit inner width / 2 L55=L52×COS(β2-α)+orbit inner width / 2 L56=L53×COS(β3-α)+orbit inner width / 2 (7) Measurement points of the obstacle sensor box (J1, J2, J3) (8) The value K obtained by converting the laser measurement value into the horizontal direction K = Laser measured value × COS(α) (9) Calculated value (with cant) M M = Horizontal distance from the track center to the obstacle sensor box =L54+K,L55+K,L56+K

[0063] By inputting the above calculated value M into the program software of the control device 29 in FIG. 6, the "distance from the track center line X0 to the platform door measurement point" when a cant is present can be automatically obtained.

[0064] The above is a calculation formula considering cant as an example of a case where the track is not in a normal state. However, other than cant, examples of a case where the track is not in a normal state include slack, which is a slight widening of the rail width at a curved section to make it easier for vehicles to pass, and transition curves, which are provided to avoid a strong shock when entering another curve from a curved section. Slack and transition curves are also matters determined by each railway company. Therefore, by including the amount of slack due to the slack and the inward and outward coefficients due to the transition curve in the calculation formula corresponding to each railway company, the horizontal distance from the track center to the obstacle sensor box can be accurately calculated even when slack or transition curves exist.

[0065] As is clear from the above explanation, according to this embodiment, the position of the obstacle sensor box 3 relative to the building limit line G is confirmed by the confirmation surface 18b of the distance confirmation member 18 in Figure 1, so that the distance of the platform door 2 relative to the track center X0 can be confirmed easily and quickly.

[0066] In addition, since the laser measuring devices 22a, 22b, and 22c are provided on the distance confirmation member 18, an inexpensive laser distance meter that can measure a short distance can be used as the laser measuring device. As a result, the distance measuring device for platform doors can be manufactured inexpensively.

[0067] (Other embodiments) Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments and can be modified in various ways within the scope of the invention described in the claims. For example, in the above embodiment, a point on the end face of the obstacle sensor box 3 was considered as the measurement point P0 of the platform door 2. However, the measurement point may be a point on any structure that protrudes toward the track side at the platform door 2.

[0068] Furthermore, in the above embodiment, three laser measuring instruments are used, but the number of laser measuring instruments may be one or a number other than three depending on the shape and size of the structure to be measured. [Explanation of symbols]

[0069] 1: platform, 2: platform door, 3: obstacle sensor box (projecting structure), 3a: long obstacle sensor box, 3b: short obstacle sensor box, 4a, 4b: track, 5: distance measuring device for platform door, 6: bogie, 7: frame, 8: support member, 9: support, 9a: mounting surface, 10: enclosure, 11: door, 12: reinforcing member, 13: fixing element, 15: wheel, 16: encoder, 17: bogie fixing device, 18: distance confirmation member, 18a: inner edge surface (mounting edge surface), 18b: confirmation surface, 21a, 21b: mounting plate, 22a: first laser measuring device, 22b: second laser measuring device, 22c: third laser measuring device, 23: laser emitting element, 24: laser receiving element, 25: measurement measuring device door distance calculation unit, 26: power supply, 29: control device, 30: track door distance calculation unit, 31: trolley movement distance calculation unit, 32: track door distance calculation unit, 33: memory, 34a, 34b, 34c: input / output interface, 35: display device, 36: printer, 37: input device, D0: track confirmation surface distance, D1: track measurement device distance, D2: measurement device door distance, D3: track door distance, E-E': trolley movement direction, F: track surface, G: construction limit line, J1, J2, J3: obstacle sensor box measurement point, P0: measurement point, P1: measurement reference point of measurement device, S1: light receiving signal, S2: measurement device door distance data signal, Tr: trigger signal, W: width of distance confirmation member, X0: track center line

Claims

1. A distance measuring device for platform doors that measures the distance between a platform door installed on a platform at a railway station and the track, A carriage movable on the track; A support provided on the bogie; A distance confirmation member provided on the upper portion of the support pillar, the distance confirmation member has a first branch portion extending upward from the support pole and a second branch portion provided parallel to the first branch portion with a predetermined width therebetween, and an outer surface of the second branch portion is a confirmation surface; The platform door is provided on the platform side of the construction limit line, The support column, when the carriage is placed on the track, It is disposed on the track side of the construction limit line, and The platform extends in the vertical direction while facing the track-side end of the platform, The confirmation surface is disposed opposite to an end surface of the track-side protruding portion of the platform door, the confirmation surface extends in the up-down direction along an end face of the track-side overhanging portion of the platform door, and a point of the confirmation surface closest to the platform door is on a construction limit line, The distance confirmation member is detachable from the upper portion of the support pillar, An attachment surface for fixing the first branch of the distance confirmation member is provided on the upper portion of the support pole, and the first branch is provided with an attachment side surface for fixing to the attachment surface. A distance measuring device for platform doors.

2. The platform door has a sensor that detects an obstacle between the platform door and the track, and an obstacle sensor box that has the sensor built in, The end face of the track-side protruding portion of the platform door is the track-side end face of the obstacle sensor box.

2. A distance measuring device for platform doors as claimed in claim 1.

3. A laser measuring device is attached to the distance confirmation member so as to face the platform door, The laser measuring device has a light emitting element that emits a laser beam toward a measuring point on the end face of the platform door on the track side, a light receiving element that receives the laser beam reflected at the measuring point and outputs a signal, and a measuring device door distance calculation means that calculates the distance between the laser measuring device and the measuring point based on the output signal from the light receiving element, and further, This distance measuring device for platform doors has a track door distance calculation means for calculating the distance of the platform door from the track based on the output signal of the measuring device door distance calculation means.

2. A distance measuring device for platform doors as claimed in claim 1.

4. Based on the distance data calculated by the track door distance calculation means and the distance data actually measured using triangulation, the attachment position of the distance confirmation member or the laser emission position of the laser measurement device is adjusted. A distance measuring device for platform doors as claimed in claim 3.

5. a carriage travel distance measuring means for measuring a distance traveled by the carriage on the track; a track-door distance calculation means for determining a relationship between the distance of the platform door from the track and the travel distance of the carriage based on the distance data calculated by the track-door distance calculation means and the distance data measured by the carriage travel distance measurement means; 5. A distance measuring device for platform doors as claimed in claim 4, further comprising:

6. A plurality of the laser measuring devices are provided in the vertical direction of the distance confirmation member, The reference points for the laser emission and laser reception of these laser measuring instruments are at the same position in the horizontal direction and different positions in the vertical direction. A distance measuring device for platform doors as claimed in claim 3.

7. A distance measuring device for platform doors as described in claim 1, characterized in that it has a bogie fixing means for fixing the bogie in a fixed position on the track.

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