JP2006290520A - Safety device for passenger conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for a passenger conveyer for simply and directly supervising a tensile force of a chain for supplying a driving force to a moving handrail drive device, so as to eliminate a possibility of failure or trouble of equipment when a too much force is generated in the moving handrail of a passenger conveyer caused by mischief or the like. <P>SOLUTION: The tensile force of the main chain 5 that transmits the driving force to the moving handrail drive device 3 is converted into a large displacement value by using levers 10, 11 and springs 12, 13 to measure the force generated in the moving handrail 2. Therefore, an abnormality is supervised more accurately than ever. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a passenger conveyor having a moving handrail, and in particular, to one using a chain for transmitting the driving force of the moving handrail.

  A moving handrail drive device using a chain has a structure in which, when a force that is opposite to the moving direction of the moving handrail acts excessively, the chain tension increases in proportion to the force. For this reason, when the tension was too great, the double sprocket shaft was damaged, and accidents such as chain breakage occurred.

Therefore, conventionally, an abnormal displacement of the plate of the moving handrail driving device is detected by a sensor and electrically stopped before an accident occurs (see Patent Document 1).
JP 07-277656 A (paragraphs 23 to 30).

  According to these background technologies, it is possible to stop the passenger conveyor before an accident by monitoring the displacement of the plate even if an excessive force is generated on the moving handrail that is opposite to the traveling direction of the moving handrail. It is. However, the amount of displacement is an extremely small amount of elastic deformation of the moving handrail that occurs when the driving roller presses the moving handrail. For this reason, it may be difficult to adjust the sensor or malfunction due to a manufacturing error of the moving handrail.

  The present invention has been made to solve the above problems, and an object thereof is to provide a safety device for a passenger conveyor that can easily and directly monitor the tension of a chain that supplies driving force to a moving handrail driving device. It is in.

  In order to achieve the above object, in the present invention, the sprocket shaft for changing the direction of the main chain is rotated and supported, and the lever is rotatably supported by the frame and fixed to the frame so as to contact the portion where the sprocket of the lever is attached. The passenger conveyor safety device includes a push spring that pressurizes the main chain via a sprocket, a switch that detects a predetermined displacement of the lever, and a passenger conveyor stop unit that captures and stops the output of the switch. It is characterized by that.

  By providing the above configuration, when an excessive force contradicting the traveling direction of the moving handrail increases, the driving force is supplied to the driving device unless the driving roller attached to the moving handrail driving device slips. Chain tension increases. At this time, the main chain generates a force that linearizes between the sprocket and the double sprocket as the tension increases. By this force, the sprocket and the sprocket are pushed upward, and as a result, the lever contacts the switch and the passenger conveyor can be stopped.

  By using the above configuration, it is possible to easily measure the force generated in the moving handrail 2, and it is possible to monitor with higher accuracy and provide a highly safe passenger conveyor safety device.

  Conventionally, as a measure for preventing an excessive force generated in the direction opposite to the traveling direction due to mischief or the like on the moving handrail, as disclosed in Japanese Patent Laid-Open No. 7-277656, the driving roller mounting plate 3b of the moving handrail driving device 3 is provided. The amount of displacement was detected and stopped electrically before the double sprocket broke.

  However, the amount of displacement is an extremely small amount of elastic deformation of the moving handrail that occurs when the driving roller presses the moving handrail. For this reason, it may be difficult to adjust the sensor or malfunction due to a manufacturing error of the moving handrail.

  Therefore, in the present invention, attention is paid to the tension of the chain 5 having a large degree of change with respect to the generation of the excessive force, and the following configuration is devised.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a sectional view of the moving handrail drive device shown in FIG.

Step 1 having a tread surface for transporting passengers, balustrade 1a arranged at both ends of the step, moving handrail 2 and movable handrail 2 that can be moved in synchronization with step 1 described above with the balustrade as the travel path are the same as step 2 The moving handrail driving device 3 that is moved at a speed, the moving handrail driving device 3 that is disposed on the plate 3b of the device and that can press the moving handrail 2 in the vertical direction, and the moving handrail drive. The component 3 of the device 3 is a double sprocket 4 disposed at the lower end of the plate 3b of the device, the drive roller 3a is connected to the double sprocket 4, the drive chain 4a sharing the driving force, and the plate 3b on which these are disposed is supported in the vertical direction. Same as the guide pin 4b that enables the drive device to move smoothly, the terminal gear 8a that drives the step 1, and the terminal gear 8a Disposed thereon, the sprocket 8 to share the driving force, the main chain 5 which is disposed between the sprocket 8 and the double sprocket 4 for transmitting the driving force, the passenger conveyor having a frame 9 to store these moving handrail drive mechanism,
The sprocket 6, the sprocket 7, the sprocket 6, and the sprocket 7 that change the direction of the main chain 5 are rotatably supported, and the other end is rotatably supported by the frame 9. 6, the sprocket 7 is in contact with the part to which the sprocket 7 is attached, the other end is fixed to the frame 9, and the press spring 12, the press spring 13, the lever 10, and the lever 11 that press the sprocket 6 and the sprocket 7 against the main chain 5 are predetermined. It is passenger conveyor stop means 16 that takes in the outputs of the switch 14, switch 15, switch 14, and switch 15 for detecting that the displacement has been reached, and stops the passenger conveyor.

  By providing the above configuration, when an excessive force opposite to the traveling direction of the moving handrail 2 increases, the driving force is supplied to the driving device 3 as long as the driving roller 3a attached to the moving handrail driving device 3 does not slip. The tension of the chain 5 is increased. At this time, the chain 5 generates a force that linearizes the space between the sprocket 8 and the double sprocket 4 as the tension increases. With this force, the sprocket 6 and the sprocket 8 are pushed upward, and as a result, the lever 11 and the lever 12 come into contact with the detection means 14 and the detection means 15 to stop the passenger conveyor. At this time, by reducing the force generated in the spring 13 and the spring 14, it is possible to set the safety side and extend the life of the moving handrail 2. On the contrary, when it is not preferable from the viewpoint of safety to stop the passenger conveyor suddenly during rush hour such as city traffic, an alarm or the like can be generated instead of stopping the passenger conveyor.

  Although the embodiment has been described with respect to the inclined type passenger conveyor, the same effect can be obtained for a horizontal object.

  By using the above configuration, it is possible to easily measure the force generated in the moving handrail 2, and it is possible to monitor with higher accuracy and provide a highly safe passenger conveyor safety device.

Explanatory drawing of embodiment of this invention. Sectional drawing of the moving handrail drive device shown in FIG.

Explanation of symbols

1 step 1a balustrade 2 moving handrail 3 moving handrail driving device 3a moving handrail driving roller 3b plate 4 double sprocket 4a drive chain 4b guide pin 5 main chain 6 sprocket 7 sprocket 8 sprocket 8a terminal gear 9 frame 10 lever 11 lever 12 push spring 13 Push spring 14 Switch 15 Switch 16 Passenger conveyor stop means

Claims (1)

A step having a tread for conveying passengers, a balustrade arranged at both ends of the step, a moving handrail that can move in synchronization with the steps described above using the railing as a travel path, and a moving handrail that moves the moving handrail at the same speed as the step A moving handrail drive roller that is arranged on the plate of the apparatus as a component of the driving device and the moving handrail driving device, and that can press the moving handrail in the vertical direction, and a lower end portion of the plate of the apparatus as a component of the moving handrail driving device Double sprocket arranged on the drive, drive chain that connects the drive roller and the double sprocket to share the driving force, guide pins that support the plate on which these are arranged and the drive device can move smoothly in the vertical direction, terminal that drives the step Sprockets that are arranged on the same axis as the gear and terminal gear and share the driving force The main chain is arranged between the bull sprocket for transmitting the driving force, the passenger conveyor having a frame that stores these moving handrail drive mechanism,
A lever that rotates and supports the shaft of the sprocket that changes the orientation of the main chain and is supported by the frame, and a push spring that is fixed to the frame so that it touches the part where the sprocket of the lever is attached and pressurizes the chain via the sprocket And a passenger conveyor safety device comprising: a switch for detecting that the lever has reached a predetermined displacement; and a passenger conveyor stop means for capturing the output of each of the switches and stopping the passenger conveyor.

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