JP7253979B2 - Abnormality determination device - Google Patents

Description

The present invention relates to an abnormality determination device for a movable platform fence.

BACKGROUND ART Conventionally, a movable platform fence is known which is installed on a platform of a railway station and partitions the platform from the track side. The movable platform fence has a structure in which the door pocket supports the door and is driven to open and close, and the door is housed in the door pocket when the door is opened, and the door is advanced from the door pocket when the door is closed. to open and close the passenger entrance to and from the train.

On the other hand, a movable platform fence equipped with a means for detecting the occurrence of an abnormality is known. For example, Patent Literature 1 discloses a configuration in which, when an abnormality in a door (opening/closing door) is detected by an abnormality detection sensor, the door in which the abnormality has occurred is displayed and a station attendant or the like is notified. In the technique disclosed in Patent Literature 1, a malfunction of the door portion, an overload, or the like is detected as an abnormality.

JP 2006-88963 A

One of the configurations of the movable platform fence is a configuration in which a direct-acting guide portion supports the load of the door portion and guides the movement of the door portion in the opening/closing direction. The linear motion guide is mainly composed of two members, a guide rail and a block, and is realized by a linear motion mechanism (also called a linear guide) in which the guide rail slides relative to the installation position of the block. . That is, a guide rail is attached to one of the door case and the door along the opening and closing direction of the door, and a block is attached to the other to support the load of the door and guide the movement of the door.

An abnormality that can occur in the movable platform fence of this configuration is an abnormality in the state of support of the door portion due to deterioration of the block portion. For example, if a rolling-type linear guide is used as the linear motion guide, the ball bearings incorporated in the block wear and deteriorate with use. As the deterioration progresses, the door portion cannot be supported normally, causing problems such as rattling when opening and closing, and the resulting opening and closing failure. However, in the technique disclosed in Patent Document 1, when an opening/closing failure actually occurs due to deterioration of the block portion, it can be detected, but it cannot be determined whether or not it is due to an abnormality in the support state of the door portion. is difficult.

It should be noted that not only the rolling type linear guide but also the sliding type linear guide may cause the same problem if the guide surface is deteriorated due to use.

The present invention has been made in view of the above problems. It is an object of the present invention to provide a technology capable of determining an abnormality in the support state of the.

A first invention for solving the above problems is
A linear motion guide in which a guide rail is attached to one of the door case and the door in a single straight line along the opening and closing direction of the door, and a block slidably engaged with the guide rail is attached to the other. An abnormality determination device for a movable platform fence in which a portion supports the load of the door portion and guides the opening and closing direction of the door portion,
a detection unit that detects an inclination angle in the vertical direction of the door;
an abnormality determination unit that determines an abnormality in the support state of the door unit by the linear motion guide unit based on the tilt angle detected by the detection unit;
It is an abnormality determination device comprising

According to the first invention, it is possible to determine whether or not the support state of the door portion is abnormal based on the vertical inclination angle of the door portion whose load is supported by the linear guide portion.

Moreover, as a second invention,
The linear motion guide portion is configured by attaching the guide rail to the door portion, and attaching the block to an opening side of the door pocket portion through which the door portion enters and exits,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully closed state or a state immediately before being fully closed.
You may constitute the abnormality determination apparatus of 1st invention.

According to the second invention, in the movable platform fence having a configuration in which the guide rail of the linear guide part is attached to the door part and the block is attached near the opening of the door pocket part, the block is on the door bottom side of the door part. Abnormality in the support state can be determined using the tilt angle in the vertical direction when the door is fully closed or just before being fully closed.

Moreover, as a third invention,
The linear motion guide portion is configured by attaching the guide rail to the door pocket portion and attaching the block to the door trailing edge side of the door portion,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully closed state or a state immediately before being fully closed.
You may constitute the abnormality determination apparatus of 1st invention.

According to the third invention, in the movable platform fence having a configuration in which the guide rail of the linear guide part is attached to the door pocket and the block is attached to the door bottom side of the door, the block is positioned near the opening of the door pocket. Abnormality in the support state can be determined using the tilt angle in the vertical direction when the door is fully closed or just before being fully closed.

Moreover, as a fourth invention,
The linear motion guide portion is configured by attaching the guide rail to the door pocket portion and attaching the block to the door trailing edge side of the door portion,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully open state.
You may constitute the abnormality determination apparatus of 1st invention.

According to the fourth invention, in the movable platform fence having a configuration in which the guide rail of the linear guide part is attached to the door compartment and the block is attached to the door bottom side of the door part, the block is attached to the door bottom side of the door compartment. Abnormality of the support state can be determined using the inclination angle in the vertical direction of the door portion located in the fully opened state.

Moreover, as a fifth invention,
The detection unit has an inclination sensor arranged on the door for detecting the inclination angle,
The abnormality determination device of any one of the first to fourth inventions may be constructed.

According to the fifth invention, the tilt sensor arranged on the door can detect the tilt angle of the door in the vertical direction.

Also, as a sixth invention,
The detection unit has two distance sensors that are arranged at different heights in the door case and measure the distance from the arrangement position to the door. to detect the tilt angle;
The abnormality determination device of any one of the first to fourth inventions may be constructed.

According to the sixth invention, the vertical inclination angle of the door can be detected using the distances measured by the distance sensors arranged at different height positions in the door pocket.

Moreover, as a seventh invention,
The linear motion guide has two blocks that are engaged with the guide rail at different locations,
An abnormality determination device according to any one of the first to sixth inventions may be constructed.

According to the seventh invention, it is possible to determine whether the support state of the linear motion guide portion having two blocks that engage with the guide rail is abnormal.

Moreover, as an eighth invention,
The abnormality determination unit is provided at an installation position away from the movable platform fence and remotely performs the abnormality determination.
The abnormality determination device of any one of the first to seventh inventions may be constructed.

According to the eighth invention, it is possible to remotely monitor the support state of the door part in the movable platform fence by the abnormality determination unit installed away from the movable platform fence.

The figure which showed the installation example to the platform of a movable platform fence. Sectional drawing which showed the internal structural example of the movable platform fence in a fully open state. Sectional drawing which showed the internal structural example of the movable platform fence in a fully closed state. The figure explaining door support abnormality determination. 4 is a flowchart showing the flow of processing performed by an abnormality determination unit; Sectional drawing which showed the example of an internal structure of the movable platform fence in the modified example 1. FIG. Sectional drawing which showed the example of an internal structure of the movable platform fence in the modification 2. FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the present invention is not limited by the embodiments described below, and the forms to which the present invention can be applied are not limited to the following embodiments. Moreover, in the description of the drawings, the same reference numerals are given to the same parts.

FIG. 1 is a diagram showing an installation example of a movable platform fence 10 to which an abnormality determination device 17 (see FIG. 2 and the like) of the present embodiment is applied on a platform. 2 and 3 are cross-sectional views showing an example of the internal structure of one movable platform fence 10, omitting the side surface of the door compartment 11 on the platform side, and FIG. A cross section and FIG. 3 each show a cross section in the fully closed state of the door portion 12 .

[Configuration of movable platform fence]
A plurality of movable platform fences 10 are arranged along the longitudinal direction of the track side edge of the platform, and partition the platform from the track side. Each movable platform fence 10 has a structure in which the door pocket 11 supports one door 12 on either the left or right side and is driven to open and close, and the door 12 opens and closes according to the arrival of the train T. The boarding gate to the train T is opened and closed by moving forward and backward along the longitudinal direction of the platform, which is the direction.

Specifically, the movable platform fence 10 includes a linear motion guide portion 13 installed along the opening and closing direction of the door portion 12 above the door pocket portion 11 fixed to the floor surface 9 of the platform, and the door pocket portion 11. a regulating guide 14 installed along the opening/closing direction of the door portion 12 at the bottom to suppress swinging of the door portion 12 (more specifically, lateral swing of the lower end of the door portion 12 toward the platform side and the track side); A door driving unit 15 that drives the door unit 12 to move forward and backward, and a control unit that performs control related to the movable platform fence 10 including driving the door driving unit 15 according to a control signal from an external control device (not shown). 16.

Here, as shown in FIG. 2, the opening and closing direction of the door portion 12 (horizontal direction in FIG. 2) is the X-axis direction, the vertical direction (height direction) of the door portion 12 is the Y-axis direction, the X-axis direction and the Y-axis direction. The thickness direction of the door portion 12, which is the direction perpendicular to the direction, is defined as the Z-axis direction. Further, the positive direction of the X-axis direction (rightward in FIG. 2), which is the direction in which the door portion 12 is advanced from the door pocket portion 11 to close the doorway, is "forward", and the door portion 12 is positioned in the door pocket portion to open the doorway. The negative direction of the X-axis direction (leftward in FIG. 2), which is the direction in which the robot 11 is retracted and retracted, is defined as "rear".

The door pocket part 11 has a storage space for the door part 12 inside, and when the door is closed, the door part 12 moves (advances) forward from the opening 111 of the door pocket part 11, and the door part of the adjacent movable platform fence 10 moves forward. 12 and the door are closed (fully closed state). The advance position (fully closed position in FIG. 3) of the door portion 12 to be advanced in the fully closed state is set in advance as, for example, a position where the door portions 12 of the adjacent movable platform fences 10 and the door ends are in contact with each other. In addition, it is good also as a position which adjoins without contact|abutting. Even in that case, the fully closed position is set in advance. On the other hand, during the door opening operation, the door portion 12 moves rearward in the direction opposite to that during the door closing operation and is accommodated in the door pocket portion 11 to open the entrance (the fully open state in FIG. 2).

The door pocket 11 is not limited to the configuration in which the door portion 12 is accommodated in the door pocket 11 provided with the storage space, and may be configured so as to function as a door pocket for passengers on the platform side. For example, all or part of the side surface on the track side may be omitted to expose the track side so that the structure looks like a screen from the platform side.

The linear motion guide portion 13 is a linear motion mechanism (linear guide) in which the guide rail 131 slides relative to the installation position of the block 133, and the load of the door portion 12 is supported by the linear motion guide portion 13. At the same time, the forward/backward movement of the door portion 12 in the opening/closing direction is guided. In the present embodiment, the direct-acting guide portion 13 has a single linear guide rail 131 attached to the upper portion of the door portion 12 along the opening/closing direction. Two blocks 133 (133a, 133b) to be engaged are attached and constructed. The two blocks 133a and 133b are attached to the upper portion of the door case 11 near the opening 111 with a predetermined spacing therebetween, and engage with the guide rail 131 at different points. Specifically, each of the blocks 133a and 133b has its mounting position adjusted so that, for example, the center-to-center distance Lb (see FIG. 4) thereof becomes a predetermined specified value, and the inside of the door pocket portion 11 on the track side. It is fixed on the upper side.

Here, for example, a rolling type linear guide can be used for the linear motion guide portion 13, and the two blocks 133a and 133b have balls interposed between them and the guide rail 131 to roll when they slide. A bearing (not shown) is incorporated.

The door drive unit 15 is realized by, for example, a belt drive type drive mechanism, and includes a motor 151 arranged behind the door unit 12 and a drive pulley 153 connected to the output shaft of the motor 151 via a speed reduction mechanism unit 152 . , a driven pulley 154 arranged in front of the driving pulley 153 (on the front end side of the door); A belt clamp 156 for connecting and fixing a predetermined position of the timing belt 155 and the door portion 12 is provided. The distance between the axes of the pulleys 153 and 154 is set according to the advance distance of the door portion 12 . Further, the motor 151 is provided with an encoder for detecting the cumulative rotation angle of its output shaft. By using a motor with a brake, a servomotor, or the like as the motor 151, the stopping accuracy can be improved.

When the door portion 12 is opened, the control portion 16 controls the motor 151 so that the drive pulley 153 rotates clockwise to move the door portion 12 rearward. Then, the cumulative rotation angle detected by the encoder from the start of the door opening operation is monitored, and the motor 151 is stopped when it reaches a predetermined value necessary for retracting the door portion 12 into the door pocket portion 11 . On the other hand, when the door portion 12 is closed, the control portion 16 controls the motor 151 so that the driving pulley 153 rotates counterclockwise to move the door portion 12 forward. Then, the cumulative rotation angle detected by the encoder from the start of the door closing operation is monitored, and the motor 151 is stopped when the predetermined value required for advancing the door portion 12 from the door pocket portion 11 to the fully closed position is reached. Let In addition, the control unit 16 outputs each notification to that effect to the abnormality determination unit 173 of the abnormality determination device 17 described later at the start and end of the opening and closing operation (door opening operation and / or door closing operation), and each During the operation, the accumulated rotation angle of the motor 151 from the start of the operation is output to the abnormality determination section 173 .

[Configuration of abnormality determination device]
The abnormality determination device 17 of the present embodiment is provided in each movable platform fence 10 and determines abnormality in the state of support of the door portion 12 by the linear motion guide portion 13 constituting the movable platform fence 10 . Specifically, the movable platform fence 10 provided with the abnormality determination device 17 is configured such that the linear motion guide portion 13 supports the load of the door portion 12 as described above, and is incorporated in the block 133. As the ball bearing wears and deteriorates due to use, the door portion 12 rattles in the vertical direction and tilts from the horizontal state at the beginning of installation (when the linear guide portion 13 is new). Therefore, the abnormality determination device 17 monitors this tilt and determines that the support state of the door portion 12 is abnormal when, for example, the allowable tilt angle θ (see FIG. 4) is exceeded.

Specifically, the abnormality determination device 17 includes a detection unit 171 that detects the tilt angle of the door portion 12 in the vertical direction, and an abnormality determination of the support state of the door portion 12 ( and an abnormality determination unit 173 that performs door support abnormality determination.

The detection unit 171 includes an inclination sensor arranged at an appropriate position on the door part 12 and detects an inclination angle of the door part 12 in the vertical direction. For example, an acceleration sensor can be used as the tilt sensor. In this case, the detection unit 171 obtains the tilt angle of the door unit 12 from the measurement value of the tilt sensor based on the support state of the door unit 12 when the linear guide unit 13 is new, and outputs the tilt angle to the abnormality determination unit 173 at any time. do. Then, the abnormality determination section 173 performs door support abnormality determination based on the tilt angle from the detection section 171 . A gyro sensor may be used as the tilt sensor, and the vertical tilt angle of the door portion 12 may be detected from the measured value of the angular velocity during the door closing operation.

Here, the detection of the inclination angle is performed to determine an abnormality in the support state of the door portion 12 by the direct-acting guide portion 13 . In this embodiment, the two blocks 133 (133a, 133b) that engage with the guide rail 131 are attached near the opening 111 in the upper portion of the door case 11. As shown in FIG. Therefore, the abnormality determination unit 173 uses the inclination angle when each block 133 is in the fully closed state in which the door portion 12 is positioned on the door trailing edge side for the door support abnormality determination. The arrangement position of the detection unit 171 (more specifically, the tilt sensor) is not particularly limited, but it is preferable to arrange it on the side of the door far from each block 133 in the fully closed state. In the present embodiment, the detection unit 171 is arranged at the edge portion of the door portion 12 on the door tip side, as shown in FIG. 2 and the like.

It should be noted that the door support abnormality determination may be performed using the inclination angle when each block 133 is in the fully open state where the door portion 12 is positioned on the door tip side. In that case, the detection unit 171 (tilt sensor) should be arranged on the door bottom side of the door unit 12, which is far from each block 133 in the fully open state.

Further, in the present embodiment, the fully closed position is set at the position where the door ends contact the door portions 12 of the adjacent movable platform fences 10, but the state of contact with the adjacent door portions 12 is set. Then, there is concern that the measurement accuracy of the tilt sensor will decrease. In this case, the state in which there is a gap between the door ends of the adjacent door portions 12 may be set as the fully closed state (state immediately before fully closed). Specifically, the fully closed position may be set to a position on the side of the door trailing edge (backward) by a predetermined amount from the position where the door tips abut against each other.

FIG. 4 is a diagram for explaining door support abnormality determination. As described above, the two blocks 133a and 133b that constitute the linear guide portion 13 are fixed to the door pocket portion 11 side so that the center-to-center distance Lb is the specified value. On the other hand, a limit value (limit amount of backlash) Xb is defined in advance for the amount of vertical backlash of the door portion 12 during the opening/closing operation, in order to use it as a guideline for replacement timing of the linear motion guide portion 13, and the like. . Therefore, if the tilt angle of the door portion 12 when the door portion 12 rattles to the limit is defined as the allowable tilt angle θ, the allowable tilt angle θ is obtained from the values of the center-to-center distance Lb and the limit amount of play Xb as shown in FIG. It can be obtained by the following formula (1). The abnormality determination unit 173 uses the allowable tilt angle θ as a threshold value, for example, determines that the tilt angle detected by the detection unit 171 exceeds the allowable tilt angle θ as an abnormal condition, and when the abnormal condition is satisfied, the linear movement is performed. The support state of the door portion 12 by the guide portion 13 is determined to be abnormal.

[Process flow]
FIG. 5 is a flowchart showing the flow of processing performed by the abnormality determination unit 173. As shown in FIG. In the present embodiment, the abnormality determination unit 173 waits for a notification of completion of the closing operation from the control unit 16 and monitors completion of the closing operation of the door unit 12 . Then, when a notification of completion of the door closing operation is input from the control unit 16 and the door unit 12 is fully closed (step S1: YES), the door is supported based on the tilt angle from the detection unit 171 at that time. Abnormality determination is performed (step S3). Specifically, the tilt angle is compared with the allowable tilt angle θ, and if, for example, the allowable tilt angle θ is exceeded, the support state is determined to be abnormal. When it is determined that there is an abnormality (step S5: YES), a notification to that effect is output to the outside (step S7). For example, outputting to an external display device installed in a suitable place such as a station premises, a warning display prompting maintenance such as inspection and replacement of the linear motion guide section 13 of the corresponding movable platform fence 10 is performed.

As described above, according to the present embodiment, it is determined whether or not the support state of the door portion 12 is abnormal based on the vertical inclination angle of the door portion 12 whose load is supported by the linear guide portion 13. can do. Specifically, it is possible to determine an abnormality in the support state caused by deterioration of the block 133 such as wear of the built-in ball bearings. According to this, since maintenance such as inspection and replacement of the linear motion guide portion 13 can be appropriately performed, excessive parts replacement can be prevented, and maintenance costs can be reduced.

It should be noted that the form to which the present invention can be applied is not limited to the above-described embodiment, and the addition, omission, or change of constituent elements can be applied as appropriate.

[Modification 1]
For example, the configuration of the movable platform fence 10 to which the abnormality determination device 17 of the embodiment is applied is not limited to the configuration of the above embodiment. FIG. 6 is a cross-sectional view showing an example of the internal structure of the movable platform fence 10A in this modified example. It shows a cross section. In FIG. 6, the same code|symbol is attached|subjected to the structure similar to the said embodiment.

As shown in FIG. 6, in the movable platform fence 10A of this modified example, the linear motion guide portion 13A has a guide rail 132 attached in a single straight line along the opening and closing direction of the door portion 12 above the door pocket portion 11. Two blocks 134 (134a, 134b) are attached to the upper portion of the door portion 12 so as to be slidably engaged with the guide rails 132. As shown in FIG.

Each of the blocks 134a and 134b is attached to the door bottom side of the upper portion of the door portion 12 at a predetermined interval, and engages with the guide rail 132 at different points. Specifically, the respective blocks 134a and 134b are adjusted in their mounting positions so that, for example, the center-to-center distance becomes a predetermined specified value in the same manner as in the above-described embodiment. fixed to Also in this modified example, for example, a detection unit 171 having a tilt sensor is arranged on the door tip side of the door unit 12 to detect the tilt angle in the vertical direction. Then, the abnormality determination section 173 performs door support abnormality determination using, for example, the measurement value of the tilt sensor when the door section 12 is in the fully closed state shown in FIG.

In the case of this modified example as well, the same effects as those of the above-described embodiment can be obtained. Also in the case of this modification, the door support abnormality determination may be performed using the inclination angle in the fully open state in which each block 133 is positioned on the door bottom side of the door pocket portion 11 .

[Modification 2]
Further, in the above-described embodiment, an example in which the detection unit 171 is configured using the tilt sensor is shown, but the detection unit may be configured to detect the vertical tilt angle of the door unit 12 . FIG. 7 is a cross-sectional view showing an example of the internal structure of the movable platform fence 10 equipped with the abnormality determination device 17B of this modified example. A cross section of the door portion 12 in a fully closed state is shown. In FIG. 7, the same code|symbol is attached|subjected to the structure similar to the said embodiment.

As shown in FIG. 7 , an abnormality determination device 17B of this modification includes a detection section 18 and an abnormality determination section 173 . The detection unit 18 has two distance sensors 181 a and 181 b which are arranged at different heights in the door pocket 11 and detect the distance to the door 12 . For example, the distance sensors 181a and 181b are arranged at different positions in the Y-axis direction so that the positions in the X-axis direction are aligned at the same position behind the door portion 12 (door bottom side). Then, the detection unit 18 calculates the tilt angle of the door 12 in the vertical direction based on the distances measured by the distance sensors 181a and 181b when the door 12 is in the fully closed state shown in FIG. 7, for example. The tilt angle can be obtained from the height difference between the distance sensors 181a and 181b and the difference between the measured distances. The detection unit 18 then outputs the obtained tilt angle to the abnormality determination unit 173 . The difference in height between the distance sensors 181a and 181b may be set in advance based on the installation position within the door pocket portion 11 of each.

In the case of this modified example as well, the same effects as those of the above-described embodiment can be obtained.

[Modification 3]
Further, in the above-described embodiment, the door support abnormality determination is performed using the tilt angle detected by the detection unit 171 when the door unit 12 is in the fully closed state. It was decided to determine whether On the other hand, it is also possible to adopt a configuration in which the door support abnormality determination is performed using the inclination angle in the state immediately before the fully closed state. For example, when the door portion 12 is closed, a brake is applied immediately before the door portion 12 is fully closed, and control is performed to slow down the moving speed of the door portion 12 from there until the door portion 12 is fully closed. In this case, the control unit 16 advances the door unit 12 to the advance position (position immediately before full closing) when the cumulative rotation angle detected by the encoder from the start of the door closing operation is in the state immediately before full closing. Deceleration control of the motor 151 is performed at the time when the predetermined value required for the above is reached. Then, the inclination angle detected by the detection unit 171 when the deceleration control is performed and the state immediately before the fully closed state may be used for door support abnormality determination. Specifically, the abnormality determination unit 173 determines the tilt angle detected by the detection unit 171 when the cumulative rotation angle of the motor 151 input from the control unit 16 during the door closing operation of the door unit 12 reaches the predetermined value described above. is used and compared with the allowable tilt angle .theta. to judge whether the support state is abnormal.

In the case of this modified example as well, the same effects as those of the above-described embodiment can be obtained.

[Modification 4]
Moreover, in the above-described embodiment, the configuration in which each of the movable platform fences 10 is provided with the abnormality determination device 17 is exemplified. On the other hand, while each movable platform fence 10 is provided with a detection unit 171 at an appropriate location, a processing device connected to each control unit 16 via a network is installed at an appropriate location such as a station premises as an abnormality determination unit. However, an abnormality determination device can also be configured.

In that case, the control unit 16 outputs the tilt angle of the door unit 12 during the opening/closing operation detected by the detection unit 171 to the abnormality determination unit (processing device) at any time, and notifies the start and end of the opening/closing operation. , the cumulative rotation angle of the motor 151 during the opening/closing operation is output as needed to the abnormality determination unit. Then, as an abnormality determination unit, the abnormality determination unit performs door support abnormality determination for each movable platform fence 10, and if there is a door unit 12 determined to be abnormal, displays a warning prompting maintenance thereof.

According to this modification, the abnormality determination unit installed at a location away from the movable platform fence 10 collectively remotely monitors the support state of the door portion 12 by the linear motion guide portion 13 in each movable platform fence 10. , the abnormality can be determined.

[Other Modifications]
Further, in the above-described embodiment, a rolling type linear guide having a ball bearing was exemplified as the linear motion guide portion 13, but a sliding type linear guide may also be applied in the same manner. Moreover, although the linear motion guide part 13 having the configuration including two blocks is illustrated, the number of blocks is not limited to two, and may be one.

Further, the door support abnormality determination is not limited to being performed every time the door section 12 performs the door closing operation, and may be performed, for example, once a day.

10,10A movable platform fence, 11 door pocket, 111 opening, 12 door, 13,13A linear motion guide, 131,132 guide rail, 133 (133a, 133b), 134 (134a, 134b) block, 14 regulation Guide 15 Door driving unit 16 Control unit 17, 17B Abnormality determination device 171, 18 Detection unit 173 Abnormality determination unit 181a, 181b Distance sensor T Train

Claims (8)

A linear motion guide in which a guide rail is attached to one of the door case and the door in a single straight line along the opening and closing direction of the door, and a block slidably engaged with the guide rail is attached to the other. An abnormality determination device for a movable platform fence in which a portion supports the load of the door portion and guides the opening and closing direction of the door portion,
a detection unit that detects an inclination angle in the vertical direction of the door;
an abnormality determination unit that determines an abnormality in the support state of the door unit by the linear motion guide unit based on the tilt angle detected by the detection unit;
Abnormality determination device with The linear motion guide portion is configured by attaching the guide rail to the door portion, and attaching the block to an opening side of the door pocket portion through which the door portion enters and exits,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully closed state or a state immediately before being fully closed.
The abnormality determination device according to claim 1. The linear motion guide portion is configured by attaching the guide rail to the door pocket portion and attaching the block to the door trailing edge side of the door portion,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully closed state or a state immediately before being fully closed.
The abnormality determination device according to claim 1. The linear motion guide portion is configured by attaching the guide rail to the door pocket portion and attaching the block to the door trailing edge side of the door portion,
The abnormality determination unit determines whether the support state is abnormal based on the tilt angle detected by the detection unit when the door is in a fully open state.
The abnormality determination device according to claim 1. The detection unit has an inclination sensor arranged on the door for detecting the inclination angle,
The abnormality determination device according to any one of claims 1 to 4. The detection unit has two distance sensors that are arranged at different heights in the door case and measure the distance from the arrangement position to the door. to detect the tilt angle;
The abnormality determination device according to any one of claims 1 to 4. The linear motion guide has two blocks that are engaged with the guide rail at different locations,
The abnormality determination device according to any one of claims 1 to 6. The abnormality determination unit is provided at an installation position away from the movable platform fence and remotely performs the abnormality determination.
The abnormality determination device according to any one of claims 1 to 7.

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