[0015] Hereinafter, an embodiment of the safety device of the passenger conveying equipment of the present invention will be described with reference to the drawings. figure 1 The lower end of the passenger conveyor 40 is shown in a perspective view. Below the handrails 44 formed with the left and right handrails 42, the pedals 1 connected in a ring shape are arrange|positioned. A plurality of parallel grooves and comb-shaped teeth 22 that can protrude are formed on the upper surface of the pedal 1 and the arc-shaped surface on the front side. The entrance and exit floor 2 is partially overlapped with the pedal 1 and arranged horizontally. A plurality of parallel grooves and protruding comb-shaped teeth 22 are also formed on the upper surface of the entrance and exit floor 2. The entrance and exit floor 2 is stationary, and a main frame 46 is arranged at an end in the width direction. An entrance and exit floor support beam 3 is also arranged. The entrance and exit floor support beam 3 is perpendicular to the guide member 46 and holds both ends on the main frame 46. The entrance and exit floor support beam 3 supports the entrance and exit floor 2.
[0016] The front side surface of the doorway floor support beam 3 has a flat surface, and the acceleration sensor unit 4 is attached to the flat surface. In addition, in the figure 1 Although the acceleration sensor unit 4 is installed on the doorway floor support beam 3, the acceleration sensor unit 4 may be installed on the doorway floor 2. The acceleration signal detected by the acceleration sensor unit 4 is guided to the control device 5 via wiring. The control device 5 includes a filter (not shown) for selecting a desired signal from the signals detected by the acceleration sensor unit 4, an arithmetic unit 6 and a control unit 7 for integrating the signal filtered by the filter. ; Among them, the control unit 7 compares the integral value calculated by the calculation unit 6 with a preset threshold to determine whether there is an abnormality, and when there is an abnormality, the passenger conveyor 40 is stopped or operated at a low speed. Such as figure 1 As shown, the acceleration sensor unit 4 is arranged on both sides of the entrance and exit floor 2, the entrance and exit floor support beam 3 or the back side of the entrance and exit floor support beam 3, and the underside of the entrance and exit floor 2. The acceleration in the traveling direction of the pedal 1 can be detected. .
[0017] Next, the operation of the safety device 50 of the present embodiment constructed as described above will be described. When a foreign matter jam occurs between the pedal 1 or between the pedal 1 and the entrance and exit floor 2 of the passenger conveyor 40, a collision phenomenon caused by the foreign matter may occur between the pedal 1 and the entrance and exit floor 2. Due to this collision, an acceleration having a large component is generated in the traveling direction of the pedal 1. This acceleration is transmitted to the entrance and exit floor 2 and the entrance and exit floor support beam 3. Therefore, the acceleration sensor unit 4 which is arranged in the traveling direction of the pedal 1 and has sensitivity. Thereby, it is possible to grasp the vibration phenomenon of the doorway floor 2 at the time of direct collision.
[0018] In addition, in order to prevent the acceleration sensor unit 4 from interfering with the pedal 1 when the pedal 1 is cyclically driven, the acceleration sensor unit is arranged on the front side of the entrance and exit floor support beam 3 or under the entrance and exit floor 2 and close to the back of the entrance and exit floor support beam 3 4. Thus, even if the pedal 1 cycles, it is possible to prevent damage to the acceleration sensor unit 4 without colliding with the acceleration sensor unit. in figure 1 Although the acceleration sensor unit 4 with sensitivity in the direction of travel of the pedal 1 is provided on the front side of the entrance and exit floor support beam 3, if the acceleration sensor unit 4 with sensitivity in the vertical direction is arranged on the entrance and exit floor 2, for example Next, etc., it is possible to more reliably separate the collision phenomenon between the entrance and exit floor 2 and the pedal 1 caused by the blockage of foreign matter from other phenomena.
[0019] That is, if normal walking is performed on the entrance and exit floor 2, the output of the acceleration sensor unit 4 having vertical sensitivity is greater than the output of the acceleration sensor unit 4 having sensitivity in the traveling direction of the pedal 1. If a foreign matter jam occurs, the output of the acceleration sensor unit 4 having sensitivity in the traveling direction of the pedal 1 becomes larger than the output of the acceleration sensor unit 4 having sensitivity in the vertical direction. Therefore, since the output relationship between the acceleration sensor unit 4 with sensitivity in the vertical direction and the acceleration sensor unit with sensitivity in the traveling direction of the pedal 1 is in a reverse relationship, it is possible to specify the entrance and exit floor 2 caused by the blockage of foreign objects. Collision with pedal 1.
[0020] figure 2 The mounting part of the acceleration sensor unit 4 is shown in detail in a perspective view. On the acceleration sensor unit 4, an acceleration IC chip 8 is provided on the substrate 9. At the four corners of the substrate 9, one side surface (the right side surface in the figure) of the mounting block 10 formed into a rectangular parallelepiped shape is fastened and connected by the substrate fastening connection members 11A to 11D. The mounting block 10 is provided with a hole that penetrates from the front side to the depth, and the block fastening connecting members 12A and 12B inserted in the hole fix the mounting block 10 to the entrance and exit floor support beam 3.
[0021] According to this embodiment, even if it is a passenger conveying facility that has already been installed and used, the acceleration sensor unit 4 can be additionally installed only by simple construction. In addition, when an acceleration sensor for detecting acceleration in the vertical direction is added, the substrate 9 is mounted on the side surface of the mounting block 10 that is not used, for example, on the left side surface such that the acceleration detection direction becomes the vertical direction. It is only necessary to mount the acceleration IC chip 8 on the substrate 9. In this embodiment, although the acceleration IC chip 8 and the substrate 9 are combined to form the acceleration sensor unit 4, the detection of acceleration is not necessarily limited to the IC chip. In short, as long as the acceleration in the traveling direction or the vertical direction of the pedal 1 can be detected.
[0022]Although the board 9 and the mounting block 10 are fastened and connected by the board fastening connection members 11A-11D, and the installation block 10 and the entrance and exit floor support beam 3 are fastened and connected by the block fastening connection members 12A and 12B, they can also be substituted Using these fastening connection mechanisms, fastening connection methods such as adhesion are used. Needless to say, the base plate 9 may be directly installed on the entrance and exit floor 2 or the entrance and exit floor support beam 3 without using the installation block 10.
[0023] image 3 Another embodiment of the acceleration sensor unit 4 is shown in detail in a perspective view. in figure 2 In the illustrated embodiment, the substrate 9 is covered by the resin film 13. This is to prevent the lubricating oil used on the passenger conveying equipment 40 from splashing or to prevent the acceleration sensor unit 4 from malfunctioning due to adhesion of rainwater. As a result, the reliability of the acceleration sensor unit 4 can be further improved.
[0024] Figure 4 Expressed figure 1 The control block diagram of the control device 5 included in the safety device 50 of the passenger conveyor 40 is shown. As described above, in the control device 5 of the safety device 50 of the passenger conveyor 40, after receiving the signal detected by the acceleration sensor unit 4, it removes the low-frequency components contained in the acceleration signal detected by the high-pass filter processing circuit 14 . The signal from which low frequency components are removed is subjected to full-wave rectification by the full-wave rectification processing circuit 15. The rectified signal is integrated by the integration processing circuit 16. The high-pass filter processing circuit 14, the full-wave rectification processing circuit 15 and the integration processing circuit constitute the arithmetic unit 6.
[0025] The acceleration signal processed by the computing unit 6 is compared with a preset threshold value in the threshold value comparison circuit 17. Through the comparison of the threshold value comparison circuit 17, when the detected signal is judged to be abnormal, the stopping device 18 stops the passenger conveying equipment 40. At the same time, the abnormality transmitting device 19 reports the abnormality to the outside. The threshold value comparison circuit 17, the stopping device 18, and the abnormality transmitting device 19 constitute the control unit 7. The acceleration sensor unit 4 also includes a disconnection detection circuit 20 (not shown) for detecting disconnection of the power supply line, the signal line, and the GND line.
[0026] In the control device 5 configured as described above, a characteristic acceleration signal is input by the following phenomena. (1) The acceleration signal generated when jumping from the pedal 1 to the entrance and exit floor 2. (2) The acceleration signal generated by the umbrella etc. when it is at the entrance and exit floor 2. (3) The acceleration signal generated when the entrance/exit floor 2 and the pedal 1 are blocked by a foreign object. Due to these various phenomena, characteristic vibrations occur on the entrance/exit floor 2 or entrance/exit floor support beam 3, and these vibrations are received as characteristic acceleration signals. which is,
[0027] (1) Vibration or collision when jumping from pedal 1 to entrance and exit floor 2:
[0028] Since the passenger violently jumps to the floor 2 of the entrance and exit, the energy that causes the vibration is relatively large. As a result, the amplitude of the acceleration generated on the entrance and exit floor 2 is large. However, the rubber or resin in the sole can ease the collision and attenuate high-frequency components. Therefore, the acceleration sensor unit 4 installed on the entrance and exit floor 2 or its vicinity detects an acceleration signal in which high frequency components are weak and low frequency components are dominant.
[0029] (2) Vibration or collision when an umbrella is held on the floor 2 of the entrance and exit:
[0030] Depending on the rigidity of the front end of the umbrella, an exciting force is generated to the high frequency band. Since the force generation state is in the form of pulses, the energy that causes vibration is small. Therefore, although the amplitude of the acceleration generated on the entrance and exit floor 2 is large immediately after the collision, it attenuates immediately.
[0031] (3) Vibration or collision when the entrance and exit floor 2 is blocked by foreign matter, and when it collides with the pedal 1:
[0032] The energy that causes vibration is large, and it also contains a lot of high-frequency components. The acceleration and amplitude caused by this collision are large, and also contain a large amount of high-frequency components. This phenomenon is characterized by acceleration that continues to produce long-term collisions.
[0033] Due to the difference in the acceleration detected by the phenomenon, the control device 5 distinguishes between the collision phenomenon of the entrance and exit floor 2 caused by the clogging of foreign matter and the jumping phenomenon to the entrance and exit floor 2 in the following manner. The detection signal output from the acceleration sensor unit 4 is passed through the high-pass filter processing circuit 14 so as to eliminate the influence caused by the jump dominated by low-frequency components. Next, the collision phenomenon of the entrance and exit floor 2 caused by the clogging of foreign matter and the collision phenomenon caused by the umbrella or the like are distinguished by the difference in the magnitude of energy. Therefore, the acceleration waveform subjected to the filter processing is subjected to full-wave rectification in the full-wave rectification processing circuit 15 to be converted into the size of the waveform, and converted into an energy value in the integration processing circuit 16.
[0034] If a jump phenomenon occurs when the passenger conveyor 40 is operated, the acceleration signal detected by the acceleration sensor unit 4 is filtered by the control device 5 to become only a high-frequency component, and the integrated value of the acceleration signal becomes smaller. Therefore, at this time, since the integrated value of the acceleration signal is smaller than the threshold value, it is not judged as abnormal.
[0035] Similarly, if a collision phenomenon occurs when the passenger conveying equipment 40 is operated, the integral value of the acceleration signal is small in this phenomenon that originally caused the vibration energy to be small. Since the integrated value of the acceleration signal is smaller than the threshold value, this is not judged to be abnormal either. Contrary to this, if a collision phenomenon of the entrance and exit floor 2 caused by foreign matter clogging occurs during the operation of the passenger conveyor 40, the energy that causes the vibration is large, and the detected acceleration signal contains a large amount of high-frequency components. Therefore, The integrated value of the acceleration signal becomes larger. Therefore, when a collision occurs due to clogging of foreign objects, the integrated value of the acceleration signal becomes larger than the preset threshold value. The threshold value and the integrated value of the measured acceleration are compared by the threshold value judgment circuit 17. When setting the threshold value, it is possible to clearly compare the values of foreign body clogging and other phenomena.
[0036] In addition, in order to further improve the operating efficiency of the passenger conveying equipment 40, the threshold value of the integration value of the acceleration signal set by the control device 5 may be set to multiple levels. At this time, the severity of the clogging of the foreign body can be judged. For example, if two thresholds are set, the integrated value of the acceleration signal is larger than the first threshold of the low threshold and smaller than the second threshold of the high threshold, a collision caused by a foreign object jam on the passenger conveyor 40 When it is judged to be mild, the passenger conveying equipment 40 is switched to low-speed operation and the abnormality is notified to the outside. The so-called mild abnormality refers to, for example, a situation where a foreign object collides with the entrance/exit floor 2 and damages the comb-shaped teeth 22.
[0037] On the other hand, when the integrated value of the acceleration signal is larger than the second threshold as the high threshold, it is determined that the passenger conveyor 40 cannot continue to operate in this way, and the passenger conveyor 40 is immediately stopped and the abnormality is notified to the outside. By setting the threshold in this way, it is possible to continue low-speed operation without stopping under the collision of the degree of damage of the comb-shaped teeth 22, thereby reducing the reduction in operating efficiency. In addition, since the cause of the collision phenomenon caused by the clogging of foreign matter can be eliminated during the continuous operation at low speed, it is possible to avoid major accidents between minor abnormalities.
[0038] The control device 5 of this embodiment has a disconnection judgment circuit 20. Next, the operation of the disconnection determination circuit 20 will be described. As described above, the acceleration sensor unit 4 of the safety device 50 includes the power supply line, the signal output line, and the GND line (not shown). The output signal of the acceleration sensor unit 4 includes a certain amount of offset.
[0039] In the acceleration sensor unit 4 configured as described above, there is a possibility that one of the wires is broken and a malfunction occurs. Therefore, the disconnection determination circuit 20 always monitors the compensation amount included in the acceleration signal input from the high-pass filter 14. If the compensation amount is zero and continues for a long time, it is determined that the power supply line and the signal output line are disconnected. In addition, if the detected acceleration signal corresponds to the maximum additional voltage and this state continues for a long time, it is determined that the GND line is disconnected. Therefore, only by monitoring the input signal, it is easy to make an early judgment on the discomfort of the acceleration sensor unit 4.
[0040] Figure 5 Another embodiment of the acceleration sensor unit of the present invention is shown in detail in a side view. It can be detected that when the acceleration sensor unit 4 is fastened and connected to the entrance and exit floor 2 with a fastening connection member 12 such as a bolt, the substrate 9 may fall off or the substrate fastening connection member 11 may become loose. The difference of the above-mentioned embodiment lies in that the board fastening connection members 11A-11D are non-conductive, and the wiring for connecting the signal output terminals of the acceleration IC chip 8 and the through-hole portions of the board fastening connection members 11A-11D are provided. Patterns etc. Flat pads 21A to 21D are mounted on each of the board fastening connection members 11A to 11D so as to be connected to the wiring pattern extending to the through-hole portion.
[0041] In the present embodiment constructed as described above, each flat pad 21 functions as a connection switch for connecting the wiring of the through-hole portion. That is, even if loosening occurs in one of the board fastening and connecting members 11A to 11D, the output signal can be cut off at the location where the loosening occurs. At this time, the output signal of the acceleration sensor unit 4 continues to be in a zero state for a long time, so that the disconnection judgment circuit 20 (refer to Figure 4 ) The looseness of the substrate fastening and connecting component 11 can be detected.
[0042] Although in this embodiment, the substrate fastening and connecting member 11 adopts a non-conductive structure, the same effect can be obtained even if the mounting block 10 is made of a non-conductive material. When the mounting block 10 and the substrate fastening connection member 11 are made of conductive materials, the material of the flat pad 21 is only required to be double-structured, and the side connected to the substrate 9 is made conductive, and the substrate fastening connection member 11 is connected One side should be non-conductive.
