JP2001089059A - Escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of an escalator by monitoring whether or not a step is in a specified attitude in a specified route. SOLUTION: A motor 4 and a brake 5 are connected to a control device 3, and the drive/step of a step of an escalator is controlled by controlling the motor 4 and the brake 5 by the control device 3. A step attitude detection part 1 detects the attitude of the step of the escalator, and outputs the detection signal to a normality/abnormality judgment part 2. The normality/abnormality judgment part 2 judges whether the attitude of the step is normal or abnormal based on the detection signal from the step attitude detection part 1, and informs the result of judgment to the control device 3. When the result of judgment that the attitude of the step is abnormal is received, the control device 3 controls the motor 4 and the brake 5 to stop the escalator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escalator, and more particularly to an escalator capable of changing a direction at both ends of an escalator while a tread surface on which a passenger is to be carried is kept facing upward.

[0002]

2. Description of the Related Art Generally, in an escalator, a chain is hung between a sprocket on one side and a sprocket on the other side, and a plurality of steps are attached to the chain endlessly. Then, for example, by rotating one of the sprockets, the chain circulates, and accordingly, each step circulates. Conventionally, in such an escalator, the posture of the step is configured to change from upward to downward or from downward to upward at the sprocket. The portion provided with the sprocket for changing the posture of the step is called a turning portion.

If the posture of the step is changed in the turning section as described above, the diameter of the turning section must be increased to some extent in order to avoid interference between the steps, and therefore the entire escalator becomes thicker, Large space for installation was needed. This is the biggest bottleneck when installing the escalator.

Therefore, for example, Japanese Patent Application Laid-Open No. 10-250968
Japanese Patent Application Laid-Open Publication No. HEI 9-175702 proposes an escalator in which a step is turned while a tread surface of the step is kept facing upward. If the direction of the step is changed with the tread surface of the step facing upward, the diameter of the turning portion can be reduced, and the thickness of the escalator can be reduced. Hereinafter, this type of escalator will be referred to as a parallel rotation type escalator.

[0005]

By the way, in the conventional parallel rotation type escalator, in order to reduce the diameter of the turning portion while avoiding the interference between the steps in the turning portion, the posture of the step is inclined. The step is turned on a path that does not cause interference. For this reason, a predetermined posture is taken along a predetermined path, and a posture control mechanism for realizing this is provided.

[0006] Further, in the parallel rotation type escalator, it is difficult to avoid occurrence of a singular point on the mechanism where the operation of the step becomes unstable. For this reason, an assist mechanism for stably performing the step operation near the singular point is provided, whereby the step operation near the singular point can be performed stably, and the step is performed on a predetermined path along a predetermined path. The posture can be taken. Here, the singular point will be described.For example, in the step, the front wheel is provided on the side close to the tread, the rear wheel is provided on the side far from the tread, the front wheel is driven by a chain, the front wheel is driven by the front wheel support rail, and the rear wheel is the rear wheel. When supported by the support rails, the point at which the straight line connecting the front wheel center and the rear wheel center is perpendicular to the rear wheel support rail surface is the singular point.

The above-mentioned attitude control mechanism and assist mechanism may be separate mechanisms, or the same mechanism may serve both.

In any case, in order to operate the escalator including the parallel rotation type escalator stably, the steps must take a predetermined posture on a predetermined path.
Then, in order to further improve the reliability of the escalator operation, it is necessary to monitor that the steps take a predetermined posture on a predetermined path.

However, in the conventional escalator,
It was not performed to monitor whether the steps were in a predetermined posture on a predetermined path, and the consideration for reliability was insufficient.

[0010] It is an object of the present invention to monitor whether a step is in a predetermined posture on a predetermined path,
An object of the present invention is to provide an escalator capable of further improving reliability.

[0011]

In order to achieve the above object, the present invention provides a circulating means which is hung between a rotating body on one side and a rotating body on the other side and circulates between the two rotating bodies. , Arranged endlessly along the circulating means, while each is connected to the circulating means and circulates with the circulating means,
A plurality of steps having treads on top of which passengers are placed, detecting means for detecting the attitude of the step near the two rotating bodies, and determining means for determining whether the attitude of the step is normal or abnormal based on the detection result And control means for stopping the circulating movement of the step when the posture of the step is abnormal.

According to the above arrangement, the posture of the step passing near both the rotating bodies is detected by the detecting means, and the detection result is inputted to the determining means. The determining means determines whether the posture of the step is normal or abnormal based on the input detection result, and if abnormal, notifies the control means to that effect, and the control means stops the cyclic movement of the step.

The present invention can be applied to an escalator in which the steps are always upward when the circulating movement is performed by the circulating means.

Further, the present invention is characterized in that a detection target is attached to the step and a sensor for detecting the detection target and outputs a detection signal is attached to the conveyor structure as the detection means. . If the sensor is attached to the position corresponding to the position of the abnormal posture of the step, the determination unit determines that the step is in the abnormal posture when the detection signal is output from the sensor, and if the detection signal is not output, It is determined that the step is in the normal posture. If a sensor is attached corresponding to the position of the step in the normal posture, the determination means determines that the step is in the normal posture when the detection signal is output from the sensor, and must output the signal. If it is, it is determined that the step is in the abnormal posture.

In the present invention, a sensor for detecting a timing at which each step passes through a predetermined area is attached to the conveyor structure as a detecting means.
When the timing detected by the sensor satisfies a predetermined condition, the step is determined to be in a normal posture, and when not satisfied, the step is determined to be in an abnormal posture. In this case, the sensor detects the timing by detecting the detected object attached to each step, or detects the timing by detecting the detected object attached to the rotary drive mechanism that drives the step. It can be configured as follows. When an assist mechanism for stably maintaining the posture when the step changes direction is provided, the sensor is configured to detect the timing by detecting a detection target attached to the assist mechanism. be able to.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 shows a first embodiment of the present invention. In this embodiment, a device configuration as shown in FIG. 1 is added to a conventional escalator. That is,
A step attitude detecting unit 1, a normal / abnormal determining unit 2, and a control device 3 are provided. An electric motor 4 and a brake 5 are connected to the control device 3, and the control of the electric motor 4 and the brake 5 by the control device 3 controls the drive / stop of the escalator step. In FIG. 1, the step posture detecting section 1 constitutes detecting means, the normal / abnormal judging section 2 constitutes determining means, and the control device 3 constitutes controlling means.

In the above configuration, the step posture detecting section 1
Detects the attitude of the step of the escalator, and outputs a detection signal to the normality / abnormality determination unit 2. The normal / abnormal determination unit 2 determines whether the posture of the step is normal or abnormal based on the detection signal from the step posture detection unit 1 and notifies the control device 3 of the determination result. When receiving the determination result that the posture of the step is abnormal, the control device 3 controls the electric motor 4 and the brake 5 to stop the escalator.

According to the above configuration, when an abnormal posture such as an abnormally inclined step of the escalator occurs, the escalator can be stopped, and the safety of the operation of the escalator can be improved.

When stopping the escalator, the escalator may be stopped immediately or gradually. When the vehicle stops gradually, there is an effect that the impact of the escalator on the passenger at the time of the stop can be reduced. Also, a broadcast to the effect of stopping before stopping may be performed. In this way, the passengers of the escalator can be alerted to stop the escalator.

The step posture detecting section 1, the normal / abnormal judging section 2 and the control device 3 shown in FIG. 1 can be applied to a parallel rotation type escalator. An example of the application will be described with reference to FIG. FIG. 2 shows the vicinity of the turning part at the top of the escalator. In FIG. 2, a plurality of steps 21 are arranged endlessly along a chain. This chain constitutes a circulation means. The chain is hung between sprockets (not shown) and circulates by rotation of the sprockets.

Each step 21 includes a front wheel 22 and a rear wheel 23
The front wheel 22 runs on the front wheel track 24,
The rear wheel 23 runs on a rear wheel track 25. Further, the chain is connected to the vicinity of the front wheel 22, and each step 21 can be tilted about the front wheel 22. Step 2
In the normal posture, the front wheel 22 is on the front wheel track 24 and the rear wheel 23 is on the rear wheel track 25 in the normal posture, as shown in FIG.
Further, when the step 21 is in the abnormal posture, for example, the posture is as shown by a broken line 26 in FIG.

A proximity sensor 27 is attached to the structure of the escalator as the step attitude detection unit 1 and can detect a proximity object in the direction perpendicular to the paper of FIG. Proximity sensor 27 determines that step 21 is in the normal posture in step 2
1 is not detected, and is located at a position where step 21 can be detected when step 21 assumes the abnormal posture indicated by broken line 26.

The normal / abnormal judging section 2 judges that the posture is not normal when the proximity sensor 27 does not detect Step 21, and judges that the posture is abnormal when detected. The determination result is notified to the control device 3. The control device 3 controls the electric motor 4 and the brake 5 so as to stop the escalator when notified of the abnormal posture in step 21 from the normal / abnormal judgment unit 2.

Incidentally, a photoelectric sensor can be used instead of the proximity sensor 27. That is, as shown in FIG. 3, a light projecting unit 31 is provided on one side of step 21 and a light receiving unit 32 is provided at the position of the proximity sensor 27 on the other side. The inclination at step 21 can be detected by detecting whether or not the light is blocked by the light receiving unit.

Further, in the present embodiment, the posture determination in step 21 is performed by the turning section above the escalator, but may be performed by the turning section below the escalator. Further, the posture of the step in another place may be determined. Further, the postures of the steps at a plurality of places may be determined. When making a determination at a plurality of locations, when it is determined that at least one of the plurality of determination locations is abnormal, the normal / abnormality determination unit 2 may notify the control device 3 of an abnormality. . Normal / abnormal judgment means 2
Notifies the control device 3 of a plurality of results corresponding to each determination location. If at least one of the results is abnormal, the control device 3 controls the electric motor 4 and the brake 5 to stop the escalator. It may be.

As described above, in order to operate the parallel rotation type escalator stably, it is necessary that the step 21 take a predetermined posture along a predetermined path. According to the present embodiment, the parallel rotation type escalator includes a parallel rotation type escalator. When an abnormal posture such as the inclination of the step 21 occurs in the escalator, the escalator can be stopped, and the safety of the operation of the escalator can be further improved.

(Embodiment 2) In this embodiment, FIG.
The proximity sensor 28 is provided as shown in FIG. The proximity sensor 28 is arranged at the position shown in FIG. This proximity sensor 28 is also attached to the escalator structure. Further, on the side surface of the step 21, a detection target 41 is provided as shown in FIG. Here, when the step 21 is in the abnormal posture as shown by the broken line 26, the detected object 41 comes to the position shown by the broken line 42. In this case, the detected object 41 is detected from the proximity sensor 28.
The distance from the proximity sensor 28 to the end face of the step 21 is d2, and the distance from the proximity sensor 2 to the end face of the proximity sensor 2 is d1.
The detectable distance of the detected object 41 of FIG.
When a is set, the proximity sensor 28 and the detection target 41 are arranged so as to satisfy d1 <da <d2 (Equation 1).

When the step 21 is in the normal posture, since the distance d2 between the proximity sensor 28 and the step 21 exceeds the detectable distance of the proximity sensor 28, the detected object 41 is not detected, and the step is in the abnormal posture. When it is at the position indicated by the broken line 26, the detected object 41 is detected by the proximity sensor 28. Then, the normal / abnormal judgment unit 2 (see FIG. 1)
When the proximity sensor 28 does not detect a step, it determines that step 21 is in a normal posture, and when it detects it, it determines that step 21 is in an abnormal posture. The determination result is notified to the control device 3.

According to the present embodiment, as shown in FIG. 2, even when the passage area of the step when the escalator is viewed from the lateral direction is not much different between when the step posture is normal and when the step posture is abnormal, Sensor detection / non-detection due to the difference in the posture of the step at the sensor installation position can be distinguished, and normal / abnormal determination of the step posture can be performed.

If the step 21 is made of a material that is difficult to be detected by the proximity sensor 28 and the detectable distance of the proximity sensor 28 to this material is db (when detection is impossible, db = 0), db <da (Equation 2)

Here, the proximity sensor 28 and the object 41 may be arranged so as to satisfy d1 <da (Equation 3) db <d2 (Equation 4) At this time, even if the thickness L of the detection target 41 is reduced and d2 <da (Equation 5), if the step 21 is in the normal posture, the proximity sensor 28 does not detect the position, When 21 is in an abnormal posture indicated by a broken line 26, it is detected by the proximity sensor 28, and it is possible to distinguish sensor detection / non-detection due to a difference in the posture of the step at the sensor installation position. It can be performed. Therefore, the thickness L of the detection target 41 can be reduced, which has the effect of making the region that moves with the step 21 compact. This is the same when the end face of the detection target 41 is the same as or inside the end face of the step 21.

Further, a plurality of proximity sensors 28 and detection objects 41 may be provided, and when a predetermined number of abnormalities are detected, the control unit 3 may be notified. The predetermined number may be one or two or more. When it is set to 1, there is an effect that the abnormality detection rate can be improved, and when it is 2 or more, there is an effect that it is possible to reduce false reports.

Further, the present embodiment can cope with both cases when the escalator is in an up operation and in a down operation.

(Embodiment 3) Next, Embodiment 3 of the present invention will be described. FIG. 5 shows an upper turning part of the parallel rotation type escalator. In the present embodiment, when step 21 is in the normal posture, a proximity sensor 51 is provided at a position where the front wheel 22 passes, and a proximity sensor 52 is provided at a position where the rear wheel 23 passes. These proximity sensors 51 and 52 are attached to an escalator structure. An object to be detected (not shown) is attached to the front wheel 22, and the proximity sensor 51 detects the approach of the object to be detected. Similarly, a detection target (not shown) is attached to the rear wheel 23, and the proximity sensor 52 detects the approach of the detection target.

As shown in FIG. 6, objects 62 and 63 to be detected are attached to the gear 61 for driving the step 21, and a proximity sensor 64 to detect the objects 62 and 63 is attached to the escalator structure. Have been. And
When the gear 61 rotates, the detected objects 62 and 63 move to the proximity sensor 6.
4, the proximity sensor 64 detects the detection targets 62 and 63. Here, when the step 21 comes to the position shown in FIG. 5, the detected object in the front wheel 22 is detected by the proximity sensor 51, and the detected object in the rear wheel 23 is detected by the proximity sensor 52.
The detection target 62 is attached to the position where the detection target 62 is detected by the proximity sensor 64 at the phases respectively detected by. Further, in FIG. 5, the detected object 63 in the front wheel and the rear wheel in the next step is positioned at the position where the detected object 63 is detected by the proximity sensor 64 at the phase detected by the proximity sensors 51 and 52. Is attached.
In the case of the present embodiment, the intervals at which the steps arrive in FIG. 5 are the 180-degree intervals of the gear angles shown in FIG. 6, but may be other angles.

FIG. 7A shows an output signal S1 (71) of the proximity sensor 51 and an output signal S2 (7) of the proximity sensor 52.
An example of the time history waveform of 2) is shown. Here, the state where each of the proximity sensors 51 and 52 detects the detection target is indicated as active. In the case of the present embodiment, the signal S1 (7
The signal levels of 1) and S2 (72) are low when active. Similarly, when the output signal of the proximity sensor 64 is S3, when the proximity sensor 64 detects an object to be detected, that is, when it is active, S3 is at a low level. Further, as shown in FIG. 7B, S1 and S2 are input to the NOR circuit 73, and the output signal is set to SA. Further, S3 is input to the inverter circuit 74, and the output signal is set to SB. The signal SB goes high when S3 is active. The signal SA is composed of the signals S1 and S2
Are high level signals only during an active period, and an example of the time history waveform is schematically shown in FIGS.
An example of the time history waveform of the signal SB shown in 5) is schematically shown in FIGS.

As shown in FIG. 7C, when the rising time of the signal SA is t1, the falling time is t4, the rising time of the signal SB is t2, and the falling time is t3, t1 <t2 <t3 < t4... (Equation 6) The positions of the detected object in the front wheel 22, the detected object in the rear wheel 23, the detected objects 62 and 63 on the gear 61, and the proximity sensors 51, 52 and 64 are set as follows. Set.

In the present embodiment, the normal / abnormal judging section 2 shown in FIG. 1 includes a circuit for latching the signal SA at the rising of the signal SB, and the latch output signal is SC. If the signal SC is at a high level, the attitude of the step is determined to be normal, and if the signal SC is at a low level, the attitude of the step is determined to be abnormal, and the determination result is notified to the control device 3.

According to the present embodiment, the posture of the step at the predetermined position can be determined at each predetermined time, so that the normal / abnormal of the posture of the step can be more accurately determined.

The normal / abnormal judging section 2 may include a circuit for latching the signal SA at the level of the signal SB instead of the latch circuit. That is, while the SB is at the high level, the SA level is output as the output SC, and when the SB falls to the low level, the SA at the falling point is output.
A circuit that latches the level of the signal and outputs it as an output SC. If the signal SC is at a high level, the posture of the step is determined to be normal. The device 3 may be notified.

At this time, even when the signal SA goes low after the rising of the signal SB and before the falling of the signal SB, it can be determined as abnormal, and the normal / abnormal of the posture of the step can be determined more accurately.

Here, the front wheel 22 and the rear wheel 2 in step 21
The detection target in 3 may be a detection target attached to the front wheel 22 or the rear wheel 23. In addition, the axis of the front wheel 22,
The shaft of the rear wheel 23 may be used. In this case, the object to be detected and the shaft can be used, and there is an effect that the apparatus cost can be reduced.

The positions of the proximity sensor and the object to be detected may be other positions, for example, the positions of the proximity sensors 55 and 56 and the objects to be detected 53 and 54 in FIG. In this case, there is an effect that the position for determining the step posture can be set more freely. Further, the number of proximity sensors and the number of detected objects may be three or more.

In FIG. 5, point 57 is the center position of the rear wheel when the step reaches a singular point on the mechanism. In the present embodiment, an example is shown in which the point at which the straight line connecting the center of the front wheel and the center of the rear wheel of the step and the surface of the rear wheel support rail are orthogonal to each other is a singular point on the mechanism. In the case of the parallel rotation type escalator, an assist mechanism for stably performing the step operation near the singular point is provided, whereby the step operation near the singular point can be performed stably. Therefore, the probability that the posture of the step becomes abnormal is considered to be the highest immediately after passing the singular point of the step, and by selecting this as a place where the posture of the step is detected and determined, the posture of the step can be more efficiently determined. Normal / abnormal can be determined. In FIG. 5, when the escalator is operated in the direction from A to B, the position of step 21 is an example of the above-mentioned location.

Further, the posture of the step is detected at a plurality of locations in the same manner as described above, and the normal / abnormal of the step posture at each location is determined on the basis of the result, and it is determined that at least one location is abnormal. In such a case, the determination result may be notified as abnormal. At this time, the probability of finding an abnormal posture of the step can be increased, and the safety of the operation of the escalator can be further improved.

In the present embodiment, the escalator is shown in FIG.
Similarly, the present invention can be implemented in the case of driving in the direction from B to A, and can cope with bidirectional operation of the escalator.

The present embodiment can be implemented without depending on the speed of the escalator. Therefore, it is possible to cope with fluctuations in the number of escalator occupants and deceleration operation when a wheelchair or the like is mounted.

The step surface of the step may be horizontal or inclined at a predetermined posture in the turning section or the forwarding section where no passengers ride. Even in this case, the present invention can be implemented in the same manner as described above.

(Embodiment 4) FIG. 8 shows Embodiment 4 of the present invention. The present embodiment is an example applied to an escalator provided with an assist mechanism for stably performing a step operation near a singular point on the mechanism. In FIG. 8, the front wheel 22 in step 21 is on the front wheel track 24, and the rear wheel 23 is on the rear wheel track 25. Here, since the lever 83 supports the rear wheel 23 near the singular point on the mechanism in accordance with the movement of the step 21, the operation of the step 21 can be performed stably. The lever 83 is driven by a cam 82 attached to a cam shaft 81, and swings in directions C and D in FIG. Hereinafter, the operation limit point in the C direction of the lever 83 is referred to as top dead center, and the operation limit point in the D direction is referred to as bottom dead center.

The cam shaft 81 may be driven by the gear 61 (see FIG. 6) for driving the step 21, or may be driven by another driving device. The lever 83 has a sensor 8
A detection object 84 that can be detected by the sensor 8 is provided, and a detection object 85 that can be detected by the sensors 86 and 87 is provided on the camshaft 81. In the present embodiment, the sensor 86
A proximity sensor is used for .about.88. Here, the lever 83
The sensors 86 and 88 and the detected objects 84 and 85 are arranged such that the sensor 88 detects the detected object 84 and the sensor 86 detects the detected object 85 when is near the top dead center.
When the lever 83 is near the bottom dead center,
The sensor 87 and the detection object 85 are arranged so that the detection target 85 is detected.

Now, by passing the output signal of the proximity sensor 88 through an inverter circuit or the like, a signal which is set to a high level when the object 84 is detected is set to S00. Similarly, the output signal of the proximity sensor 86 is converted to an inverter circuit. And the like, so that a signal which is set to a high level when the detection target 85 is detected is set to S02, and an output signal of the proximity sensor 87 is set to a high level when the detection target 85 is detected by passing through an inverter circuit or the like. When the signal thus configured is S03, an example of the time history waveform of S00 is 91, an example of the time history waveform of S02 is 92, and an example of the time history waveform of S03 is 9
9 is shown in FIG. Also, as shown in FIG.
The rising time of 00 is t1, the falling time is t4,
When the rising time of the signal S02 is t2, the falling time is t3, the rising time of the first S03 after the time t2 is t5, the falling time is t7, and the rising time of the next S00 after the time t1 is t6. t1 <t2 <t3 <t4 (Equation 7) t4 <t5 <t7 <t6 (Equation 8) The sizes and positions of the detection objects 84 and 85 and the proximity sensors 86 to 88 are set such that: Set the position.

The normal / abnormal judging section 2 (see FIG. 1) includes the following circuit. That is, a circuit that latches the signal S00 at the rise of the signal S02. This latch output signal is
04. A circuit that latches the signal S00 at the rise of the signal S03. This latch output signal is referred to as S05. A circuit that determines that the attitude of the lever 83 is normal if the signal S04 is at a high level and the signal S05 is at a low level, and determines that the attitude of the lever 83 is abnormal otherwise. This is a circuit for notifying the control device 3 of this determination result. Here, when the posture of the lever 83 is notified as abnormal, the control device 3
The electric motor 4 and the brake 5 are controlled so as to stop the escalator.

According to the present embodiment, it can be confirmed that the lever 83 is at the top dead center at a predetermined timing and that the lever 83 is at a position other than the vicinity of the top dead center at a predetermined timing. . Therefore, 1) when the lever 83 gets stuck near the top dead center, 2) when the lever 83 gets stuck near the bottom dead center, 3) when the lever 83 reaches the top dead center earlier than the predetermined timing, 4 If the lever 83 reaches the top dead center later than the predetermined timing, it is possible to detect the abnormality regarding the four levers 83. Here, since the lever 83 is an assist mechanism for stably performing the operation of the step near a singular point on the mechanism, when such an abnormality occurs in the lever 83, the posture of the step 21 becomes abnormal.

Further, according to the present embodiment, in the parallel rotation type escalator, the lever 8 serving as an assist mechanism for stably performing the step operation near a singular point on the mechanism.
In a case where there is a risk that an abnormal posture of the step may occur such as an abnormal inclination of the step as a result of causing an abnormality in the escalator 3, the escalator can be stopped and the safety of the operation of the escalator can be further improved.

As a latch circuit for the S00 signal, the level of the signal S02 and the level of the signal
00 may be latched. That is, S02
Output the S00 level as the output S04 while S02 falls to the high level. If S02 falls to the low level, the level of S00 at the time of the fall is latched and the output S04 is output.
And while S03 is at a high level, S
00 is output as an output S05, and when S03 falls to a low level, S00 at the time of the fall is output.
Is latched and output as the output S05. At this time, when the signal S00 goes low after the rising of the signal S02 and before the falling of the signal S02, or when the signal S03 rises and after the rising of the signal S03.
Also, when the signal S00 becomes high level before the fall of the signal, the abnormality can be determined as abnormal, and the normal / abnormal state can be more accurately determined.

Here, instead of the sensor 88, the sensor 8
9. The detected object 80 may be arranged in place of the detected object 84, and the sensor 89 may detect the detected object 80 when the lever 83 is near the top dead center. Accordingly, even when the sensor 88 is difficult to be arranged at this position due to a space problem or the like, the arrival timing of the top dead center of the lever 83 can be detected by the sensor 89, and the normal / abnormal of the step posture can be determined.

In order to assist the rear wheels on both sides in step 21, when the lever 83 operates on the right side and the left side, the same processing as described above is performed on the second lever. The normal posture is set only when both the lever and the left lever are normal.
This determination result may be notified to the control device 3. At this time, even if an abnormality occurs in one of the left and right levers, the abnormality can be detected, and the safety of the operation of the escalator can be further improved.

Further, instead of the cam shaft 81, an object to be detected 85 is attached to the gear 61 for driving the step,
The signals S02 and S03 may be generated by detecting the object to be detected by the sensors 86 and 87 as in the above-described embodiment. At this time, the following effects are obtained. That is, the operation of the cam shaft 81 and the operation of the gear 61 for driving the step are
In the case of the present embodiment, even when the predetermined normal phase relationship is broken, since the S02 and S03 signals are generated from the operation of the gear 61 for driving the steps, an abnormality can be detected. As an example in which the operation of the camshaft 81 and the operation of the gear 61 for driving the step are broken from a predetermined normal phase relationship, as a case where the camshaft 81 is driven by the chain from the gear 61, the chain is cut or stretched. There is.

The present embodiment can be applied to the other turning portion of the escalator, and the same effect can be obtained in this case. In particular, when the present invention is applied to both of the turning portions, if an abnormality occurs in one of the turning portions, the escalator is stopped, so that the safety of the operation of the escalator can be further improved.

(Fifth Embodiment) FIG. 10 shows a fifth embodiment of the present invention. This embodiment is an example applied to an escalator provided with an assist mechanism as in the fourth embodiment. In FIG. 10, the front wheel 22 in step 21 is
The rear wheel 23 is on the front wheel track 25 and the rear wheel 23 is on the rear wheel track 25. Here, near the singular point on the mechanism, the rollers 101 to 101
Since the step 4 supports the step 21, the operation of the step 21 can be stably performed. The roller 101 is made of a material that can be detected by the sensor 105 at a distance d0 or less.
It is supported by a spring so that a pressing force acts on it. The rollers 101 to 104 may move passively in accordance with the operation of step 21 or may move actively. Each step is driven by a chain or the like.
Step 21 can be turned around in the turning section even if ~ 104 moves passively.

As shown in FIG. 10, while the step 21 is supported by the roller 101 and while passing through the roller 101,
The arrangement of the sensor 105 and the rollers 101 to 104 is such that the distance d between the roller 101 and the sensor 105 is equal to or less than d0 and the roller 101 can be detected by the sensor 105.
The rigidity of the support springs of the rollers 101 to 104 is determined. Further, based on the output of the sensor 105, the fourth embodiment
A circuit for generating the signal S00 is provided in the same manner as described above. Further, the detection object 85 is attached to the gear 61 for driving the step, similarly to the fourth embodiment.
Is detected by the sensors 86 and 87. Here, step 21
Is a phase passing through the roller 101, the sensor 86 detects the detection target 85, and the sensor 87 detects the detection target 85 near an intermediate point between this phase and the phase passing the roller 101 in the next step. The sensors 86 and 87 and the detected object 85 are arranged. Then, similarly to the fourth embodiment, a signal S02 is generated from the output of the sensor 86 and a signal S03 is generated from the output of the sensor 87, and S00, S02, and S03 are processed. At this time, as an assist mechanism for stably performing a step operation near a singular point on the mechanism, FIG.
The same effect can be obtained even when the mechanism shown in FIG.

In each of the above embodiments, the front wheel trajectory and the rear wheel trajectory shown in each figure are examples, and may be different from the figures. Further, in each of the above embodiments, the normal / abnormal determination of the step posture may be performed by hardware or may be performed by software.

The present invention is not limited to the escalator,
Of course, it can be applied to moving sidewalks and the like.

[0064]

As described above, according to the present invention,
When an abnormal posture of the step such as an abnormal inclination of the step of the escalator occurs, the escalator can be stopped, and there is an effect that the safety of the operation of the escalator can be improved. This effect can be obtained both when the escalator is operated bidirectionally and when the escalator is decelerated.

Further, according to the present invention, in the parallel rotation type escalator, when an abnormality occurs in the assist mechanism for stably performing the step operation near the singular point on the mechanism, the escalator can be stopped. Thus, the safety of the operation of the escalator can be further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main part of an elevator according to a first embodiment of the present invention.

FIG. 2 is a main part configuration diagram of the elevator according to the first embodiment of the present invention.

3A and 3B show the position of a proximity sensor, wherein FIG. 3A is a top view and FIG. 3B is a side view.

4A and 4B show a position of a proximity sensor according to a second embodiment of the present invention, wherein FIG. 4A is a top view and FIG. 4B is a side view.

FIG. 5 is a main part configuration diagram of an elevator according to a third embodiment of the present invention.

FIG. 6 is a diagram showing the position of a proximity sensor for detecting a detection target attached to a gear.

FIG. 7A is a waveform diagram of a signal from a proximity sensor,
(B) is a diagram showing a gate circuit for processing the signal,
(C) is a waveform diagram of a signal from the gate circuit.

FIG. 8 is a main part configuration diagram of an elevator according to a fourth embodiment of the present invention.

FIG. 9 is a waveform chart of a signal from the proximity sensor shown in FIG. 8;

FIG. 10 is a main part configuration diagram of an elevator according to a fifth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 step posture detecting unit 2 normal / abnormal judging unit 3 control device 4 electric motor 5 brake 21 step 22 front wheel 23 rear wheel 24 front wheel track 25 rear wheel track 27, 28, 51, 52, 64 Proximity sensor 41, 62, 63 Body 61 Gear for driving a step 81 Cam shaft 82 Cam 83 Lever 80, 84, 85 Detected body 86-89 Sensor 101-104 Roller 105 Sensor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhiro Umekita 502 Meijicho, Tsuchiura-shi, Ibaraki Pref.Mechanical Research Laboratory Co., Ltd. (72) Inventor Ritsu Teramoto 502 Shimidate-cho Tsuchiura-City, Ibaraki Pref. Within the Machinery Research Laboratory (72) Inventor Kazuhei Kojima 1070 Ma, Hitachinaka-shi, Ibaraki Pref.Hitachi, Ltd.Elevator Group (72) Inventor Hisao Chiba 1070, Mo, Hitachinaka-City, Ibaraki Pref.Hitachi, Ltd. 72) Inventor Hirofumi Utsunomiya 1070 Ma, Hitachinaka City, Ibaraki Pref.Hitachi, Ltd. Elevator Group (72) Inventor Akira Onuki 1070 Mo, Hitachinaka, Ibaraki Pref.Hitachi Elevator Group (72) Inventor Ogawa Yutaka Midorigaoka, Daito-shi, Osaka F-term in RESTA Co., Ltd. (reference) 3F321 DD05 EA15 EB07 EC10

Claims (10)

[Claims] 1. A circulating means which is hung between a rotating body on one side and a rotating body on the other side and circulates and moves between both rotating bodies, and is arranged endlessly along the circulating means, and each is arranged endlessly. While being connected to the circulation means and circulating with the circulation means,
A plurality of steps having treads on top of which passengers are placed, detecting means for detecting the attitude of the step near the two rotating bodies, and determining means for determining whether the attitude of the step is normal or abnormal based on the detection result An escalator comprising: a control unit for stopping the circulating movement of the step when the posture of the step is abnormal. 2. The escalator according to claim 1, wherein, in the step, the tread surface is always upward when circulating with the circulating means. 3. The escalator according to claim 1, wherein a sensor that detects the step and outputs a detection signal is attached to the conveyor structure as the detection unit. 4. The escalator according to claim 1, wherein the detecting means includes a detected object in the step, and a sensor that detects the detected object and outputs a detection signal to the conveyor structure. An escalator characterized by being attached to each. 5. The escalator according to claim 3, wherein the sensor outputs a detection signal from the sensor when the sensor is mounted in a position corresponding to the abnormal posture of the step. An escalator characterized by determining that the step is in an abnormal posture when performed, and determining that the step is in a normal posture if not output. 6. The escalator according to claim 3, wherein, when the sensor is attached in a position corresponding to a normal posture of the step, the determination unit includes:
An escalator characterized in that when a detection signal is output from the sensor, the step is determined to be in a normal posture, and when the detection signal is not output, the step is determined to be in an abnormal posture. 7. The escalator according to claim 1, wherein a sensor that detects a timing at which each step passes through a predetermined area is attached to the conveyor structure as the detection unit, and the determination unit includes: An escalator characterized in that when the timing detected by the sensor satisfies a predetermined condition, the step is determined to be in a normal posture, and when the timing is not satisfied, the step is determined to be in an abnormal posture. 8. The escalator according to claim 7, wherein the sensor detects the timing by detecting a detection target attached to each of the steps. 9. The escalator according to claim 7, wherein the sensor detects the timing by detecting a detection target attached to a rotary drive mechanism that drives the step. . 10. The escalator according to claim 7, further comprising: an assist mechanism for stably maintaining a posture when the step changes direction, wherein the sensor detects a detection target attached to the assist mechanism. An escalator for detecting the timing.