JP2015140250A - Passenger conveyer - Google Patents

Abstract

An object of the present invention is to provide a passenger conveyor having a maintenance mode function capable of improving the maintenance workability of maintenance work involving removal of a tread board and enhancing the safety of maintenance personnel. A tread board missing detection device is provided in the vicinity of a running reversal portion of the tread so that when the tread is missing in the maintenance mode, the running speed of the tread is switched to a low speed side. In the maintenance work with the tread plate removed, the maintenance work efficiency can be improved because the movement of the tread is not stopped. Moreover, by switching the moving speed of the tread to the low speed side, it is possible to make it possible for maintenance personnel to recognize that the tread is removed, and to improve safety. [Selection] Figure 4

Description

  The present invention relates to passenger conveyors such as escalators and electric roads, and more particularly to passenger conveyors having a maintenance mode function.

  Passenger conveyors such as escalators and electric roads are connected to endlessly moving steps or pallets (hereinafter referred to as treads) and railings provided on both sides of the treads. It is composed of a moving handrail that moves on the balustrade in synchronization with the tread, and transports passengers with a tread that moves from one entrance to the other entrance.

  In such a passenger conveyor, it is necessary to cope with forgetting to attach the tread board when installing the passenger conveyor, breakage of the tread board, dropping of the tread board, etc. For example, Japanese Patent Application Laid-Open No. 08-91755 (Patent Document 1) proposes the following method as a method for dealing with forgetting to attach a tread board when installing a passenger conveyor.

  That is, a radiation source for emitting a beam is provided in the machine room, and the treadle is moved at a constant speed, so that the treadle mounting bracket is controlled to pass between the emitted beams at a constant period. When the mounting bracket passes through the beam, the beam reflected by the mounting bracket is received by the beam detector, and the detection signal of the beam detector repeats a high level pulse indicating the passage of the mounting bracket at a constant cycle. Will be output. The detection signal of this beam detector is input to the abnormality determination processing device, and the abnormality determination processing device measures the appearance period of a high-level pulse from the detection signal. If the appearance period becomes longer than a predetermined period, it is determined that the mounting bracket is forgotten to be attached. And output an abnormal signal. Further, the escalator control device operates to stop the escalator travel immediately upon receiving an abnormality signal output from the abnormality determination processing device.

  Thus, Patent Document 1 states that forgetting to attach the tread can be reliably detected in a short time.

Japanese Patent Laid-Open No. 08-91755

  By the way, in the passenger conveyor, maintenance work is required for inspection and repair of various devices constituting the passenger conveyor. And at the time of the maintenance work of a passenger conveyor, it is common to carry out by switching a passenger conveyor to maintenance mode. In this maintenance mode, it is often necessary to perform maintenance work with the tread board removed. For example, this corresponds to the case where the parts cannot be inspected, repaired, or replaced unless the tread is removed because of the location of the parts to be inspected, repaired, or replaced. Therefore, in this case, it is necessary to inspect or repair the open part from which the tread plate has been removed in advance, and to move it to a position where the parts to be replaced are arranged.

  Then, during maintenance work involving such tread board removal, when maintenance work is performed by a method such as that disclosed in Patent Document 1, the tread board has been removed and the abnormality determination processing device has detected an abnormal state on the tread board. Judgment is made and the operation of stopping the operation of the passenger conveyor is performed. Therefore, the maintenance staff needs to restart the passenger conveyor each time, and a new problem arises in maintenance work that the work becomes complicated and obstructs the maintenance work.

  On the other hand, in order to avoid such complicated work, there is a method of stopping the function of the abnormality determination processing device, but in this case, the passenger conveyor performs normal operation without stopping, The action alert information “stopping the tread” that recognizes that is removed is lost. Furthermore, in addition to this, it becomes difficult for maintenance personnel to grasp the exposure time when the place where the tread board is removed appears on the front side of the passenger conveyor, and the maintenance staff accidentally slides a part of the body from the open part where the tread board was removed There is a risk of causing such an accident.

  The objective of this invention is providing the passenger conveyor provided with the maintenance mode function which can improve the maintenance workability | operativity of the maintenance work accompanying removal of a tread, and can improve the safety | security of a maintenance worker.

  A feature of the present invention is that a treadle missing device is provided at a portion where the treadle travels, and when the treadle missing is detected in the normal operation mode, the treadle travel is stopped, and when the treadle missing is detected in the maintenance mode, The driving speed is switched to the low speed side.

  According to the present invention, the maintenance workability can be improved since the movement of the tread is not stopped in the maintenance work with the tread removed. Moreover, by switching the moving speed of the tread to the low speed side, it is possible to make it possible for maintenance personnel to recognize that the tread is removed, and to improve safety.

It is a lineblock diagram showing the composition of the passenger conveyor device to which the present invention is applied. It is a block diagram which shows the detail of the driving | running | working inversion part of the tread shown in FIG. 1, and shows the case where there is no removal of a tread. It is a block diagram which shows the detail of the driving | running | working inversion part of the tread shown in FIG. 1, and shows the case where there exists removal of a tread. It is a flowchart figure which shows the control method of the passenger conveyor in the maintenance operation | work which becomes the 1st Embodiment of this invention. It is a flowchart figure which shows the control method of the passenger conveyor in the maintenance operation | work which becomes the 2nd Embodiment of this invention. It is a flowchart figure which shows the control method of the passenger conveyor in the maintenance work which becomes the 3rd Embodiment of this invention. It is a flowchart figure which shows the control method of the passenger conveyor in the maintenance operation | work which becomes the 4th Embodiment of this invention. It is a flowchart figure which shows the control method of the passenger conveyor in the maintenance work which becomes the 5th Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is included in the range.

  First, the configuration of the passenger conveyor will be described with reference to FIG. FIG. 1 is a schematic side view showing a configuration of an escalator as a passenger conveyor.

  As shown in FIG. 1, an escalator 1 that is a type of passenger conveyor is provided with a frame 2 that spans an upper floor and a lower floor. The frame 2 includes an upper horizontal frame 2 a, an intermediate frame 2 b, The lower horizontal frame 2c is used. Inside the frame body 2, a plurality of step plates 6 connected endlessly are movably provided. Further, balustrades 7 that support the movable handrail 8 are erected from the frame 2 on both the left and right sides of the tread board 6. A skirt portion is provided at the bottom of the balustrade 7. Then, the tread board 6 and the moving handrail 8 move in synchronization to convey passengers from the upper entrance 20 to the lower entrance 21 during the descent operation. Moreover, a passenger is conveyed from the lower entrance 21 to the upper entrance 20 during the ascending operation.

  A tread chain 5 that connects the tread 6 in an endless manner is wound around the drive sprocket 3 and the driven sprocket 4. Furthermore, a drive unit 9 is provided in the machine room below the upper entrance 20. The drive device 9 includes a motor 11, a speed reducer and a brake device 12 (not shown), and the driving force of the motor 11 is applied to the drive sprocket 3 through the power transmission chain 10 to drive the tread plate chain 5 and the tread plate 6.

  The drive device 9 includes an operation control device 14 that controls the motor 11. The operation control device 14 controls the output of the inverter 15 that receives power from the commercial power supply 13, and receives power supply from the inverter 15. Thus, the rotation of the motor 11 is controlled. Further, the drive control unit 14 includes an operation changeover switch 16, and the operation changeover switch 16 switches between a normal mode for performing a normal business operation and a maintenance mode for performing a maintenance operation. The operation changeover switch 16 may be provided in another place such as the balustrade 7.

  Since the configuration and operation of such a passenger conveyor are well known, further explanation is omitted. Next, with reference to FIG. 2 and FIG. 3, a method for detecting a missing tread 6 when the tread 6 is not removed and when it is removed will be described.

  2 and 3 show the configuration of the tread 6 near the traveling reversing device 18 provided in the lower horizontal frame 2c. The tread 6 enters from one direction and the traveling reversing device 18 reverses the traveling direction. It shows how to exit in the other direction.

  At the bottom of the lower horizontal frame 2c, a tread board abnormality detection device 17 is provided to determine whether or not the tread board 6 has been removed. The tread board abnormality detection device 17 is constituted by, for example, a magnetic sensor or a laser sensor, and is disposed close to the trajectory through which the tread board 6 passes as shown in FIG. As shown in FIG. 2, the tread board abnormality detection device 17 is disposed at a position slightly ahead of the vicinity where the running direction of the tread board 6 is reversed. In the region where the traveling direction of the tread 6 is reversed, the traveling angle of the tread 6 may change and an accurate determination may not be possible. Therefore, it is possible to detect missing or abnormal treads 6 while traveling in the horizontal direction. Yes. In this embodiment, since control for detecting an abnormality of the tread board 6 is executed even in the normal mode in which the escalator 1 is normally operated, the signal of the tread board abnormality detecting device 17 is used even in a mode other than the maintenance mode. . Therefore, not only the overall omission of the tread board 6 but also an abnormal state such as omission of the tread surface of the tread board 6 can be detected.

  The state where the output signal of the tread board abnormality detection device 17 is different between the state where the tread plate 6 is not removed as shown in FIG. 2 and the state where the tread plate 6 is removed and there is a missing space 19 as shown in FIG. It becomes. For example, in the method of detecting the reflection of the laser beam by the laser sensor, the reflection of the laser beam is interrupted for a predetermined time when the missing space 19 without the tread plate 6 arrives during the movement of the tread plate 6, and this is detected. Thus, it is possible to detect the lack of the tread board 6. By using this signal, the control of each embodiment described below can be executed. The tread board abnormality detection device 17 can use a magnetic sensor, a capacitive sensor, or the like in addition to the laser sensor.

  A first embodiment of the present invention will be described with reference to FIG. The flow chart shown in FIG. 4 is characterized in that when it is detected that the tread 6 has been removed in the maintenance mode, the traveling speed of the tread 6 is switched to the low speed side.

  When the operation switch is turned “ON” in step S10, the operation of the escalator 1 is started, and the tread plate 6 starts traveling in a predetermined direction.

  When the operation of the escalator 1 is started in step S10, it is determined in step S11 whether the operation state is the normal mode or the maintenance mode. This determination can be made by determining whether or not the operation changeover switch 16 has switched to the maintenance mode by determining the state of the switch input. The process proceeds to step S12 where the normal mode is determined, and to step S19 where the maintenance mode is determined. It will be.

  If the normal mode is determined in step S11, it is determined in step S12 whether or not the operation switch is still “ON”. If it remains “on” in this determination, the process proceeds to step S16. If it is determined not to be “on”, in other words, if the operation switch is turned “off” and an escalator stop command is issued, the process proceeds to step S13.

  When there is an escalator stop command, in step S13, a stop command is output from the operation control device 14 to the inverter 15. In step S14, the drive of the motor 11 is stopped, and further, the running movement of the tread 6 is stopped by the brake device 12. . Thereafter, the process proceeds to step S15 and the operation of the escalator 1 is terminated.

On the other hand, if it is determined in step S12 that the operation switch remains “ON”, the process proceeds to step S16, and the tread board abnormality detection device 17 determines whether or not there is an abnormality such as dropping or breakage of the tread board 6. Since this determination is a determination in the normal mode, it is a determination to execute control different from the maintenance mode. If it is determined in step S17 that there is an abnormality, the process proceeds to step S13. If it is determined that there is no abnormality, the process proceeds to step S17. If it is determined in step S16 that there is no abnormality, the process proceeds to step S17. 14 outputs the normal speed command P0 in the normal operation to the inverter 15. Based on the normal speed command P0, the motor 11 is driven in step S17, the tread 6 is caused to travel at the normal speed V0 in step 18, and the normal operation is continued again by returning to step S12.

  On the other hand, if it is determined in step S16 that the tread 6 is abnormal, the process proceeds to step S13, a stop command is output from the operation control device 14 to the inverter 15, and the driving of the motor 11 is stopped in step S14. Stop traveling. Then, it progresses to step S15 and the driving | running of the escalator 1 is complete | finished. As a result, it is possible to eliminate the risk of inadvertently causing an accident by causing the tread plate 6 to travel while being abnormal, and to ensure safety during normal operation. If the tread board abnormality detection device 17 determines that there is an abnormality such as dropout or breakage of the tread board 6, the buzzer or speaker as a notification means notifies the user by an alarm or voice guidance. Yes.

  The control method in the normal mode has been described above. Next, the control method in the maintenance mode will be described. As described above, the current maintenance mode is intended for the maintenance mode in which the tread 6 is removed and maintenance work is performed.

  If it is determined in step S11 that the maintenance mode is set, the process proceeds to step S19. In step S19, it is determined whether or not the operation switch remains “ON”. If it is not “ON”, it is determined that there is an escalator stop command, and the process proceeds to step S13. When there is an escalator stop command, in step S13, the operation control device 14 outputs a stop command to the inverter 15, and in step S14, the drive of the motor 11 is stopped to stop the traveling movement of the tread plate 6. Thereafter, the process proceeds to step S15 and the operation of the escalator 1 is terminated.

  On the other hand, if the operation switch remains “ON” in step S19, the maintenance mode is continued and the process proceeds to step S20. Step S20 is provided with this step on the assumption that maintenance work is performed with the tread plate 6 removed in the maintenance mode. Accordingly, in this step S20, it is determined whether or not the tread 6 has been removed for maintenance work. In step S20, it is determined whether or not the tread board 6 has been removed by the tread board abnormality detection device 17, and if it is determined that the tread board 6 has not been removed, the process proceeds to step S21, and if it is determined that the tread board 6 has been removed. The process proceeds to step S23.

  If it is determined in step S20 that the tread plate 6 has not been removed, it is regarded as a maintenance operation in which the tread plate 6 is not removed, and in step S21, the normal speed command P0 in the normal operation is sent from the operation control device 14 to the inverter 15. Output. The motor 11 is driven based on the normal speed command P0, the tread 6 is caused to travel at the normal speed V0 in step S22, and the process returns to step S19 again to continue the maintenance mode. Note that the normal speed command P0 and the normal speed V0 in the normal mode and the normal speed command P0 and the normal speed V0 in the maintenance mode may be the same or different.

  On the other hand, if it is determined in step S20 that the tread 6 has been removed, the process proceeds to step S23, and the operation control device 14 sends the low speed command P1 whose speed is decelerated from the normal speed command P0 in the normal operation to the inverter 15. Output. The low speed command P1 is set to an output of about 50% of the normal speed command P0, and this low speed command P1 is set to be output only for T1 time. Even in step S20, if the tread board abnormality detection device 17 determines that the tread board 6 has been removed, a warning or voice alert can be issued by a buzzer or a speaker. This further increases the safety of maintenance personnel.

  When the low speed command P1 is set to be output for T1 time in step S23, in step S24, the inverter 15 supplies a drive signal to the motor 11 in accordance with the low speed command P1, and the tread 6 is moved to T1 at the low speed V1. Let it run for hours. Here, the time T1 that is the generation time of the low speed command P1 passes through the traveling reversing device 18 from the time when the missing space 19 from which the tread plate 6 is removed is detected by the tread plate abnormality detecting device 17 to the front side of the entrance 21. It is set to the time until the appearance and the time obtained by adding an arbitrary time to this time. This arbitrary time can be selected appropriately.

  Therefore, after the step S24, a process for determining the elapse of the T1 time may be added, and the process may return to the step S23 until the time T1 elapses, and may return to the step S19 again to continue the maintenance mode when the T1 time elapses. Then, in step S20, it is determined again whether the tread board abnormality detecting device 17 has detected a missing tread 6. If the missing tread 6 is not detected, the process proceeds to step S21 and a normal speed command P0 is output to run the tread 6. The speed is increased.

  Thus, when it is detected that the tread 6 has been removed in the maintenance mode, the maintenance personnel can be made aware that the tread 6 has been removed by switching the running speed of the tread 6 to the low speed side. It can give a function as alert information. Further, since the running of the tread 6 is not stopped by removing the tread 6 as in the prior art, the efficiency of the maintenance work can be improved.

  Furthermore, since the time until the missing space 19 appears on the front side of the entrance 21 can be increased by switching the traveling speed of the tread 6 to a low speed, it is easy to make psychological preparations for the appearance of the missing space 19 for maintenance personnel. It will be.

  Next, a second embodiment of the present invention will be described with reference to FIG. The flowchart shown in FIG. 5 is characterized in that the running speed of the tread board 6 is further switched to the low speed side when the detected number of missing tread boards does not match the number of tread boards 6 removed. Here, in each embodiment (Embodiment 2 to Embodiment 5) described below, the same reference numerals as those in the flowchart shown in FIG. 4 represent the same processing, and the description thereof will be omitted. As a matter of course, since each embodiment is based on Example 1, the operation and effect obtained by this are basically the same as those of Example 1.

  Now, when it is detected in step S20 that the tread board abnormality detecting device 17 has removed the tread board 6, the process proceeds to step S25, and it is determined whether or not the number of removed tread boards 6 has been input by maintenance personnel. The removal number NO of the tread board 6 is input to the operation control device 14 by a maintenance person using a portable tool, or is input using an input device such as a numeric keypad provided in the operation control device 14. The number of removed treads 6 is stored in storage means such as a flash memory built in the operation control device 14.

  If it is determined in step S25 that the removal number NO of the tread board 6 has been input by maintenance personnel, the process proceeds to step S26, and it is determined whether or not the removal number NO and the detected number N detected by the tread board abnormality detection device 17 match. to decide. The number of detected sheets can be obtained by measuring the length of the missing space 19 in the traveling direction and dividing the length of the missing space 19 by the length of the treadle in the traveling direction. If the removal number NO and the detected number N coincide with each other, it is a normal removal number, so that the processes of steps S23 and S24 are performed as in the first embodiment, and the process returns to step S19.

  On the other hand, if it is determined in step S25 that the removal number NO has not been input, the removal number NO and the detected number N cannot be compared, so the safety is highly estimated and the process proceeds to step S27. Furthermore, if it is determined in step S26 that the number of removed sheets NO and the detected number of sheets N do not match, there is a possibility that the tread plate 6 has newly dropped during the operation, so this also proceeds to step S27.

  The processing in step S27 is different from step S23, which is a process in the case where the normal removal number NO is confirmed, since the removal number NO of the tread plate 6 is unknown or the tread plate 6 may have dropped off in the middle. The traveling speed of 6 is further reduced so that the maintenance staff can recognize this state.

  In step S27, the operation control device 14 outputs a low speed command P2 having a lower speed than the low speed command P1 set in step S23 to the inverter 15. The low speed command P2 is set to an output of about 10% of the normal speed command P0, and the low speed command P2 is set to be output only for T2 time.

  When the low speed command P2 is set to be output for T2 time in step S27, the inverter 15 supplies a drive signal to the motor 11 by the low speed command P2 in step S28, and the tread plate 6 is driven at the low speed V2 for T2 time. Just run. In this case, as in the first embodiment, after the step S28, a process for determining whether the T2 time has elapsed is added, and the process returns to the step S27 until the T2 time elapses. It may be continued.

  Here, the time T2 that is the generation time of the low speed command P2 may be set in the same way as in the first embodiment. However, in this case, since the number of removed treads 6 is unknown or may have dropped off in the middle, T2 time is longer than T1 time set in step S23 in consideration of the safety of maintenance personnel. Is set longer.

  Thus, when the number of removed sheets is unknown or when the number of removed sheets NO is different from the detected number N compared to the case where the regular number of removed sheets is confirmed, the traveling speed of the tread board 6 is switched to a lower speed. Maintenance personnel can recognize that they are not in the assumed maintenance work environment. This further improves the safety of maintenance personnel.

  In this embodiment, the speed is reduced to 10% of the normal speed in step S27. However, if the tread 6 is newly dropped, the safety of the maintenance personnel due to an unpredictable event or a new failure of the escalator 1 is detected. The escalator 1 can also be stopped to avoid triggering.

  Next, a third embodiment of the present invention will be described with reference to FIG. The flowchart shown in FIG. 6 is characterized in that the running speed of the tread board 6 is further switched to the lower speed side when the detected tread board missing position does not coincide with the tread board 6 removal position.

  Now, when it is detected in step S20 that the tread board abnormality detection device 17 has removed the tread board 6, the process proceeds to step S29, and it is determined whether or not one or more tread board 6 removal positions X0 to Xn are input by maintenance personnel. The The removal positions X0 to Xn of the tread board 6 are input to the operation control device 14 using a portable tool by maintenance personnel as in the second embodiment, or by the numeric keypad input device provided in the operation control device 14. Entered. The removal positions X0 to Xn of the tread board 6 are stored in a storage means such as a flash memory built in the operation control device 14.

  The removal positions X0 to Xn can be obtained by determining the tread 6 as a reference position in advance and assigning an assigned number to each tread 6 in order based on this. By attaching an electrical, magnetic, or optical marker to the reference tread 6, the removal positions X0 to Xn of each tread 6 can be determined. How to set the removal positions X0 to Xn Since there are various methods, it can be appropriately performed.

  When it is determined in step S29 that the removal positions X0 to Xn of the tread board 6 are input by maintenance personnel, the process proceeds to step S30, and the tread board detected by the removal positions X0 to Xn of the tread board 6 and the tread board abnormality detection device 17 is advanced. It is determined whether or not the detection positions X of 6 match. The detected position X of the missing tread 6 can be obtained from the assigned numbers of the tread 6 before and after the missing space 19.

  If the removal positions X0 to Xn and the detection position X coincide with each other, it is a normal removal position, so that the processing in steps S23 and S24 is performed as in the first embodiment, and the process returns to step S19.

  On the other hand, if it is determined in step S29 that the removal positions X0 to Xn are not input, the removal positions X0 to Xn and the detection position X cannot be compared, so the safety is highly estimated and the process proceeds to step S27. Further, if it is determined in step S30 that the removal positions X0 to Xn and the detection position X do not coincide with each other, there is a possibility that the tread plate 6 has newly dropped during the work, so this also proceeds to step S27.

  The process in step S27 is different from the process in step S23 in which the normal removal positions X0 to Xn are confirmed, and the removal positions X0 to Xn of the tread board 6 may be unknown or the tread board 6 may have dropped off in the middle. For this reason, the traveling speed of the tread board 6 is further lowered so that the maintenance staff can recognize this state.

  Accordingly, in step S27, the operation control device 14 outputs a low speed command P2 having a lower speed than the low speed command P1 set in step S23 to the inverter 15. The low speed command P2 is set to an output of about 10% of the normal speed command P0, and the low speed command P2 is set to be output only for T2 time.

  When the low speed command P2 is set to be output for T2 time in step S27, the inverter 15 supplies a drive signal to the motor 11 by the low speed command P2 in step S32, and the tread 6 is driven at the low speed V2 for T2 time. Only the vehicle travels, and the process returns to step S19 again to continue the maintenance mode.

  As described above, when the removal position is unknown or when the removal position is different from the detection position as compared with the case where the regular removal position X is confirmed, the traveling speed of the tread plate 6 is further switched to the lower speed side. Personnel can recognize that they are not in the assumed maintenance work environment. This further improves the safety of maintenance personnel.

  In this embodiment, the speed is reduced to 10% of the normal speed in step S27. However, when the tread 6 is newly dropped, the safety of the maintenance personnel due to an unpredictable event or the new escalator 1 is improved. The escalator 1 can also be stopped to avoid inducing a failure.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. The flowchart shown in FIG. 7 is characterized in that when the tread board abnormality detecting device 17 detects that the tread board 6 is removed, the tread board 6 is stored, and the tread board 6 is caused to travel at a low speed when the maintenance work is completed.

  Now, if it detects that the tread board 6 was removed by the tread board abnormality detection apparatus 17 in step S20, it will progress to step S31 and will store the abnormality detection information R in the memory | storage means of the driving | running control apparatus 15. FIG. This abnormality detection information R is not used in the maintenance work, but is used for recognizing that the maintenance staff is the maintenance work with the tread plate 6 removed at the end of the maintenance work.

  When the operation switch is turned “OFF” in step S19 after executing the processing of steps S21 and S22 or steps S23 and S24, it is determined that the maintenance work has been completed, and the process proceeds to step S32.

  In step S32, it is determined whether or not the abnormality detection information R stored in step S31 exists. If it is determined by this determination that the abnormality detection information R is not stored, the process proceeds to step S13 assuming that steps S21 and S22 have been executed.

  In step S13, a stop command is output from the operation control device 14 to the inverter 15, and in step S14, the drive of the motor 11 is stopped and the running movement of the tread 6 is stopped. Thereafter, the process proceeds to step S15 and the operation of the escalator 1 is terminated. In this case, since the tread 6 has not been removed, there is no need to reattach the tread 6, and the operation of the escalator 1 is terminated as it is.

  On the other hand, if it is determined in step S32 that the abnormality detection information R is stored, the process proceeds to step S33, assuming that steps S23 and S24 have been executed. In step S33, the operation control device 14 outputs a low speed command P3 having a lower speed than the normal speed command P0 in the normal operation to the inverter 15. The low speed command P3 is set to an output of about 5% of the normal speed command P0, and this low speed command P3 is set to be output only for T3 time.

  If the low speed command P3 is set to be output for T3 time in step S33, the inverter 15 supplies a drive signal to the motor 11 by the low speed command P3 in step S34, and the tread plate 6 is driven at the low speed V3 for T3 time. Just run. In this case, a process for determining whether T3 time has elapsed may be added after step S34, and the process may return to step S33 until T3 time elapses, and may proceed to step S13 when T3 time elapses. Thereafter, the processes of steps S13, S14, and S15 are executed to finish the operation of the escalator 1.

  As described above, whether or not the maintenance work is the maintenance work with the tread 6 removed is determined based on the presence or absence of the abnormality detection information R of the tread board abnormality detection device 17, and if there is the abnormality detection information R, the traveling speed of the tread 6 is further reduced. It has been switched to. For this reason, since the tread 6 is run at a low speed at the end of the maintenance work, it becomes possible for the maintenance personnel to recognize that the maintenance work is performed with the tread 6 removed. That is, the operation of the tread board 6 as low-speed traveling functions as alert information. Therefore, the maintenance personnel reattach the removed tread 6 and finish the maintenance work.

  In this embodiment, the above-described control is executed when the operation switch is switched to “OFF” when the maintenance mode is terminated. However, when the maintenance mode is terminated, the maintenance mode is switched to the normal mode. At times, the tread board 6 is allowed to travel at a low speed, which may be used as alert information. Moreover, it is good also as alerting information by making the tread board 6 drive | work at low speed, when it switches to maintenance mode in order to perform a maintenance operation | work.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. The flowchart shown in FIG. 8 estimates the position of the missing space 19 from which the tread 6 is removed, and when the missing space 19 is exposed on the front side of the escalator 1, the traveling speed of the tread 6 is set to the normal speed or the missing space. It is characterized by making it drive | work at a faster speed than the case where 19 is not exposed to the front side of an escalator.

  In FIG. 3, the moving distance from the tread board abnormality detection device 17 to the lower comb portion 21A of the lower entrance 21 is 1 m, and the moving distance from the lower comb portion 21A to the upper comb portion 20 of the upper entrance 20 is 10 m. When the tread board 6 moves in the upward direction at 0.5 m / s, it can be estimated that the missing space 19 exists in the traveling reversing device 18 within 2 s after detection of the missing space 19.

  Further, if it is between 2 s and 22 s after detection of the missing space 19, it can be estimated that the missing space 19 is on the front side of the escalator 1. Furthermore, if it is 22 s or more after the detection of the missing space 19, it can be estimated that the missing space 19 has entered before the upper comb portion of the upper entrance 20.

  From such an idea, in this embodiment, when the missing space 19 of the tread board 6 is exposed on the front side of the escalator 1, the traveling speed of the tread board 6 is the normal speed, or faster than when the missing space 19 is not exposed on the front side of the escalator. It is intended to improve the working efficiency by running on. In this case, since the missing space 19 is exposed on the front side, the maintenance personnel can easily confirm this, and even if the traveling speed of the tread 6 is increased, there is no danger to the left.

  Now, when it is detected in step S20 that the tread board abnormality detection device 17 has removed the tread board 6, the process proceeds to step S31, and the abnormality detection information R is stored in the storage means of the operation control device 15. This abnormality detection information R is used as information for increasing the traveling speed of the tread 6 when the tread 6 is exposed to the front side of the escalator 1.

  And after performing the process of step S23, S24, it progresses to step S19, S20 again. In step S20, since the missing space 19 has passed through the tread board abnormality detecting device 17, the judgment is that the missing space 19 is not detected. As a result, the process proceeds to step S35.

  In step S35, it is determined whether or not the abnormality detection information R stored in step 31 is present. If there is no abnormality detection information R, the process proceeds to step S21. If it is determined that the abnormality detection information R exists, the process proceeds to step S36.

  Here, after the tread 6 has traveled for T1 time by the processing of steps S31, S23, and S24, the missing space 19 has crossed the lower comb portion 21A of the lower entrance 21, so the missing space 19 is on the front side of the escalator 1. It is in an exposed state. Therefore, in step S36, the normal speed command P0 in the normal operation is output from the operation control device 14 to the inverter 15. The normal speed command P0 is set so as to be output only for T4 time. When the normal speed command P0 is set to be output only for T4 time in step S36, the inverter 15 supplies a drive signal to the motor 11 by the normal speed command P0 in step S37, and the tread plate 6 is driven at the normal speed V0 for T4 time. Just run.

  The time T4, which is the generation time of the normal speed command P0, is the time until the missing space 19 is exposed from the lower comb portion 21A of the lower entrance 21 and enters the upper comb portion of the upper entrance 20. Therefore, the time T4 is set as a time obtained by dividing the distance from the lower comb portion 21A to the upper comb portion by the normal speed V0 as a guide. In this embodiment, the speed is switched to the normal speed V0 with the missing space 19 exposed on the front side of the escalator 1, but the point is that the vehicle can be driven at a higher speed than when the missing space 19 is not exposed on the front side of the escalator. Work efficiency is improved.

  Further, after the missing space 19 has entered the upper comb portion of the upper entrance / exit 20, the processing of steps S <b> 23 and S <b> 24 is performed again to switch the running speed of the tread 6 to a low speed. In this case, for example, a process for determining whether or not T4 time has elapsed may be added after step S37, and a logic that proceeds to step S23 when T4 time elapses may be assembled.

  Thus, according to the present embodiment, if the missing space 19 is exposed on the front side, the maintenance staff can easily confirm this, so the traveling speed of the tread 6 is increased to improve the work efficiency, and the missing space If the space 19 is not exposed to the front side, the maintenance staff cannot easily confirm this, so the traveling speed of the tread 6 can be reduced to improve safety.

  Although five embodiments have been individually described as embodiments of the present invention, it goes without saying that one or more of them can be appropriately combined and implemented.

  As described above, according to the present invention, a configuration is adopted in which a treadle missing detection device is provided in the vicinity of the running reversal portion of the tread, and when the treadle missing is detected in the maintenance mode, the running speed of the tread is switched to the low speed side. As a result, in the maintenance work with the tread plate removed, the movement of the tread plate is not stopped, so that the maintenance workability can be improved, and the tread plate is removed by the maintenance personnel by switching the moving speed of the tread plate to the low speed side. Can be recognized and safety can be improved.

  DESCRIPTION OF SYMBOLS 1 ... Escalator, 2 ... Frame body, 2a ... Upper horizontal frame, 2b ... Intermediate frame, 2c ... Lower horizontal frame, 3 ... Drive sprocket, 4 ... Driven sprocket, 5 ... Tread plate chain, 6 ... Tread plate, 7 ... Parapet, 8 DESCRIPTION OF SYMBOLS ... Moving handrail, 9 ... Driving device, 10 ... Power transmission chain, 11 ... Motor, 12 ... Brake device, 13 ... Commercial power supply, 14 ... Operation control device, 15 ... Inverter, 16 ... Operation changeover switch, 17 ... Treadboard abnormality detection Device: 18 ... Travel reversing device, 19 ... Missing space, 20 ... Upper entrance / exit, 21 ... Lower entrance / exit.

Claims (10)

A plurality of endlessly connected treads that move between one entrance and the other entrance, a balustrade provided on both sides of the treads, and a movement that moves on the balustrade in synchronization with the treads A signal from the handrail, a driving device that drives the stepboard and the moving handrail, a stepboard abnormality detection device that detects a lack of the stepboard provided in a portion where the stepboard travels, and a signal from the stepboard abnormality detection device are input. In a passenger conveyor comprising an operation control device for supplying a drive control signal to the drive device so as to perform operation in a normal mode and operation in a maintenance mode,
The driving control control device switches to a command to stop the running of the tread, and supplies a drive control signal based on the command to the driving device when the tread board abnormality detecting device detects a missing tread in the normal mode. In the maintenance mode, when the tread board abnormality detection device detects the missing tread, the traveling speed of the tread is switched to the first speed command on the lower speed side than the case where the missing tread is not detected. A passenger conveyor, wherein the drive control signal is supplied to the drive device. In claim 1,
The operation control device supplies a drive control signal based on the first speed command to the drive device for a first predetermined time. In claim 2,
The driving control device outputs a drive control signal based on a speed command increased from the first speed command when the tread board abnormality detection device does not detect a missing tread after the first predetermined time has elapsed. Passenger conveyor, characterized in that it is supplied to the drive device. In any one of Claim 1 thru | or 3,
The operation control unit stores the number of removed treads, and if the number of missing treads detected by the tread board abnormality detecting device does not match the stored number of removed treads, the first speed command A passenger conveyor characterized by switching to a second speed command different from, and supplying a drive control signal based on the second speed command to the drive device for a second predetermined time. In any one of Claim 1 thru | or 3,
The operation control unit stores the removal position of the tread, and if the removal position of the tread detected by the tread board abnormality detection device does not coincide with the stored removal position, the first speed command A passenger conveyor characterized by switching to a third speed command different from the above and supplying a drive control signal based on the third speed command to the drive device for a third predetermined time. In claim 4,
The passenger conveyor, wherein the second speed command is a speed command that is decelerated compared to the first speed command. In claim 5,
The passenger conveyor, wherein the third speed command is a speed command that is decelerated compared to the first speed command. In any one of Claims 1 thru | or 7,
The operation control device stores abnormality detection information indicating whether or not the treadle is missing by the treadboard abnormality detection device, and the first abnormality detection information is stored when the maintenance mode is terminated. A passenger conveyor characterized by switching to a fourth speed command different from the speed command and supplying a drive control signal based on the fourth speed command to the drive device for a fourth predetermined time. In any one of Claims 1 to 8,
The operation control device uses a fifth speed command that is increased from the first speed command when the missing portion of the tread is on the front side between the one entrance and the other entrance. A passenger conveyor for switching and supplying a driving control signal based on the switching to the driving device for a fifth predetermined time. In any one of Claims 1 to 9,
The passenger control apparatus according to claim 1, wherein the operation control control device issues a warning or a sound notification by a notifying means when the tread board abnormality detecting device detects a missing tread in the normal mode and the maintenance mode.

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