JP6655488B2 - Anomaly detection device for passenger conveyor or passenger conveyor steps - Google Patents

Description

  The present invention relates to a passenger conveyor such as an escalator and an automatic line, and more particularly to a device provided on a passenger conveyor and detecting an abnormality in a step of transporting passengers.

  An apparatus for detecting an abnormality in a step of an escalator is described in Patent Document 1. Patent Document 1 describes that "the head of a tread plate set screw projecting downward with respect to the tread surface" is detected by a "light emitting and receiving sensor having an optical axis crossing the longitudinal direction of the escalator". ing.

JP 2004-292152 A

  Patent Literature 1 discloses an apparatus for detecting an abnormality of an escalator. However, the detection device described in Patent Document 1 detects that the tread plate set screw crosses a specific height at which the optical axis is set. However, for example, in the European Standard (EN115-1: 2008), the distance between the tread top of the step and the comb in the height direction is specified to be 4 mm or less. Had to be set.

  Furthermore, this detection device had to be installed on the horizontal part of the passenger conveyor in which the step surface of the step moves while keeping parallel to the moving direction. However, devices for driving the steps and the handrails are densely arranged in this horizontal portion, so that it is difficult to secure an installation space and the installation workability is poor. Then, in order to realize the above-described detection accuracy, it is necessary to install the rail on which the step travels very accurately.

  An object of the present invention is to provide a passenger conveyor or a step that does not require high accuracy for installation of a detection device or a rail, and that can be installed even on a slope of a passenger conveyor where the tread surface of the step is not parallel to the moving direction. An object of the present invention is to provide an abnormality detection device.

  In order to solve at least one of the above-described problems, a passenger conveyor which transports passengers on steps, which is one embodiment of the present invention, is disposed laterally in the traveling direction on the return side of the steps, and is provided at the position. A line sensor that continuously detects the substantially vertical position of the step tread surface, a computing device that detects an abnormality in the step shape from a temporal change in the substantially vertical position, and an emergency stop of the passenger conveyor according to an output of the computing device. A control device.

  In another aspect, an abnormality detection device calculates a substantially vertical position of a step tread by a light emitting and receiving sensor having a light emitting surface orthogonal to a moving direction of the step, and calculates an end of the tread of one step. An abnormality in the step is detected based on a difference between the calculated value and the appropriate value of the substantially vertical position in accordance with the elapsed time from the detection of the portion.

  According to one aspect of the present invention, there is provided a passenger conveyor or an abnormality detection device that can reduce the installation accuracy of a light emitting and receiving sensor and a rail and can install the light emitting and receiving sensor on an inclined portion where there is room for equipment arrangement. it can.

  Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

Enlarged view around line sensor 21 Side view of escalator with step abnormality detection device Time change of the distance between the tread surface 2 of Step 1 and the lower chord material 20 at the position where the line sensor 21 is arranged Stainless steel step Side view showing the abnormality detection device for the step according to the first embodiment of the present embodiment. Enlarged view of the end of the tread 2 viewed from the direction of movement of the step

  Hereinafter, embodiments will be described with reference to the drawings.

  This embodiment will be described below with reference to FIGS.

  FIG. 2 is a side view of the escalator provided with the abnormality detecting device in the step of the present embodiment. A lower terminal gear 12 is arranged below the lower floor 11, and an upper terminal gear 14 is arranged below the upper floor 13. The step 1 is connected to an endless step chain wound around the lower terminal gear 12 and the upper terminal gear 14, and the step 1 moves when the driving device 16 in the machine room 15 rotates the upper terminal gear 14. . When the steps are ascending, the step 1 emerging from below the lower floor 12 enters below the upper floor 13, is inverted by the upper terminal gear 14, returns to the lower terminal gear 13 almost upside down, and again. The movement of appearing from below the lower floor 12 is repeated. The section in which the step moves in an almost upside down state is called a return side. On the other hand, the section in which the steps move in the normal direction is called the going side, and the section in which the steps on the going side move almost straight diagonally upward is called the slope 18 of the escalator. The side is called a lower horizontal portion 17 and the upper floor side is called an upper horizontal portion 19.

  The line sensor 21 is disposed on the inclined portion 18 and measures Step 1 on the return side.

  FIG. 1 is an enlarged view of the vicinity of the line sensor 21. The lower chord material 20 is a structural member of the inclined portion 18, and the longitudinal direction of the lower chord material 20 is parallel to the moving direction of the step 1 on the inclined portion 18. The line sensor 21 includes a light projecting unit that emits a laser beam on a straight line, and a light receiving unit having a plurality of light receiving elements arranged on a straight line, and the light projecting unit and the light receiving unit sandwich step 1 therebetween. Are located in When the step 1 passes between the light emitting part and the light receiving part, the laser light is blocked by the step 1, so that the distance between the tread surface 2 of the step 1 and the lower chord material 20 at the position where the line sensor 21 is arranged is measured. The line sensor 21 is disposed on the side in the traveling direction on the return side of the step, and continuously detects a substantially vertical position of the step tread surface at that position. The arithmetic unit 22 detects an abnormality in the step shape from a temporal change in the position of the step tread substantially in the vertical direction. The control device 23 stops the passenger conveyor in an emergency according to the output of the arithmetic device.

  FIG. 3 shows a temporal change in the distance between the tread surface 2 and the lower chord material 20 in step 1 at the position where the line sensor 21 is arranged. The temporal change in the distance between the tread surface 2 and the lower chord material 20 in step 1 at the position where the line sensor 21 is arranged will be described with reference to FIG. FIG. 3 is a time history waveform of the distance to the lower chord material 20 at a position closest to the lower chord material 20 in step 1 measured by the line sensor 21, the vertical axis represents this distance, and the horizontal axis represents time. Below the horizontal axis, a portion that blocks the line sensor 21 is described. When the step 1a passes through the line sensor 21, the distance decreases linearly because the tread surface 2 is a plane that is not parallel to the lower chord member 20. Since the riser 3 passes through the line sensor 21 next to the tread surface 2, the distance increases. Since the position of the end of the riser 3 in step 1a is different from the position of the end of the tread surface 2 in the next step 1b, the distance instantaneously changes greatly at the boundary between both steps. If there is an abnormality such as deformation of the tread 2, a time history waveform different from linearly decreasing is observed as shown by a broken line.

  Therefore, the arithmetic unit 22 detects the start of the tread surface 2 in a new step at the time when the distance instantaneously changes greatly, and when the change in the distance until the riser is detected exceeds the specified range, And outputs a stop signal to the control device 23 of the escalator. Preferably, the prescribed range is obtained by adding the distance measured at the detection time of the tread 2 of the new step and the required time calculated from the moving speed of the step and the dimension of the step 1 to this time in FIG. It is preferable that the distance is determined by the distance measured at the specified time and a specified dimensional tolerance.

  With such a configuration, even when the tread surface 2 moves non-parallel to the longitudinal direction of the lower chord material 20, the amount of protrusion of the tread plate set screw or the like from the tread surface 2 in Step 1 is as small as several mm. Also, it is possible to easily detect the protruding state. Then, it is possible to prevent the protruding portions from colliding with the combs which are the tips of the lower floor 11 and the upper floor 13 to damage these portions.

  FIG. 4 shows a stainless step to which the tread surface 2 is attached by bolting or welding in the bisected step structure. With reference to FIG. 4, an effect of a stainless step in which the tread surface 2 is attached by bolting or welding in the bisected step structure will be described. The stainless step has a structure in which a tread surface 2 formed of a stainless steel plate is connected to a front wheel mounting portion 5 and a rear wheel 6 via a triangular bracket 4 made of steel. Note that the front wheel and the rear wheel 6 run on respective rails, and support Step 1. As a destruction mode when an unexpected external force acts on the stainless steel step, a destruction mode in which the attachment portion of the tread 2 is damaged and the tread 2 is partially lifted is assumed.

  In addition, another step structure is employed, in which the rear wheel itself is used as a destruction mode common to the aluminum steps in which the portions corresponding to the tread 2, the riser 3, the triangular bracket 4, and the front wheel mounting portion 5 are formed by integral aluminum die casting. Damage to the rear wheel mounting bolts. In this breaking mode, a change occurs in which the position of the entire step approaches the lower chord material 20. Even in these destruction modes, the abnormality detection device of the present embodiment measures an abnormality in the distance between the tread surface 2 and the lower chord material 20, so that an abnormality in the step shape is detected, and Step 1 collides with the comb. Can be prevented.

  Here, if the arithmetic unit 22 can be provided with a learning function, the escalator learns a time history waveform of the distance or a feature amount of the distance in a state where the step shape at the time of factory shipment or installation is normal, The specified range may be determined by adding or subtracting a specified dimensional tolerance to the learning result.

  Preferably, the laser irradiation surface of the line sensor 21 is orthogonal to the longitudinal direction of the lower chord material 20. Alternatively, when the length of the light projecting portion and the light receiving portion can be ensured, the laser irradiation surface may be inclined in a vertical plane. In this case, a desired abnormality can be detected by setting the dimensional tolerance in consideration of the inclination, and the installation accuracy of the line sensor 21 can be reduced.

  Further, in the above description, the case where the line sensor 21 is a transmitted light type sensor including a light projecting unit and a light receiving unit has been described. The same effect can be obtained even with a reflected light sensor in which the light irradiated by the light unit is reflected in step 1 by the light receiving unit.

  FIG. 5 is an enlarged view of an end portion of the tread surface 2 viewed from the moving direction of the step. An explanation will be given of a case where the escalator including the steps having the structure in which the side end of the tread surface 2 is higher is provided with the abnormality detection device of the present embodiment with reference to FIG. The tread 2 is provided with a wave crest 7 made of stainless steel and a wave crest 8 made of plastic. The plastic crest 8 is composed of a crest 8c having substantially the same height as the stainless crest 7, and crests 8a and 8b higher than the crest 8c. For example, plastic such as polycarbonate has a higher transmittance for light having a partial wavelength than stainless steel, so that when the line sensor 21 irradiates a laser beam from the right direction in the drawing, a high wave peak portion 8a is formed. , 8b, it is possible to measure the distance between the tip of the wave crest 7 and the lower chord material 20.

DESCRIPTION OF SYMBOLS 1 ... Step 2 ... Tread surface, 11 ... Lower floor, 13 ... Upper floor, 18 ... Inclined part, 20 ... Lower chord material, 21 ... Line sensor

Claims (7)

In a passenger conveyor that transports passengers on steps,
A line sensor that is disposed on the side in the traveling direction on the return side of the step and continuously detects a substantially vertical position of the step tread surface at the position, and a step shape abnormality based on a time change of the substantially vertical position. And a control device for emergency-stopping the passenger conveyor in accordance with an output of the arithmetic device. The passenger conveyor according to claim 1,
The arithmetic unit identifies the front end and the rear end of the step tread in the traveling direction from the time change of the substantially vertical position, and when the time change of the substantially vertical direction between them is not linear, A passenger conveyor characterized by identifying abnormal shapes. The passenger conveyor according to claim 1,
The computing device stores a time change of the substantially vertical position measured when the shape of the step is normal, and stores the stored substantially vertical position and the measured substantially vertical position. A passenger conveyor characterized by identifying an abnormality in the shape of the step when the difference between the steps exceeds a specified range. The passenger conveyor according to any one of claims 1 to 3,
The line sensor includes a light-emitting unit and a light-receiving unit that are separately arranged on the left and right in the traveling direction of the step, and the light-emitting unit irradiates a light beam on a substantially vertical straight line toward the light-receiving unit, The passenger conveyor according to claim 1, wherein the light receiving unit is a transmitted light line sensor having a light receiving element arranged on a straight line parallel to the straight line. The passenger conveyor according to any one of claims 1 to 3,
Together with the line sensor and a light projecting portion and a light receiving portion disposed on the left and right side in the traveling direction of the step, the light projecting unit for projecting light in a substantially perpendicular direction on a straight line toward the step, The passenger conveyor, wherein the light receiving unit is a reflected light type line sensor having a light receiving element arranged on a straight line parallel to the straight line. The passenger conveyor according to claim 4, wherein
In the step tread, the plastic part at the left and right ends in the traveling direction is higher than the stainless steel part at the center, and the light emitted by the light projecting part has a sufficiently high transmittance in the plastic part compared to the stainless steel part. A passenger conveyor characterized by including a wavelength that becomes: An abnormality detection device for a passenger conveyor that transports passengers on steps,
A line sensor that is arranged on the side in the traveling direction on the return side of the step and continuously detects a substantially vertical position of the step tread at the position, and a time change of the step tread from the time change of the substantially vertical position. An arithmetic unit that identifies the front end and the rear end in the traveling direction, and identifies an abnormality in the shape of the step when the time change of the substantially vertical position between them is not linear; A control device for emergency stop of the passenger conveyor, the line sensor includes a light emitting unit and a light receiving unit that are separately arranged on the left and right in the traveling direction of the step, and the light emitting unit is the light receiving unit. Along with irradiating a light beam on a straight line in a substantially vertical direction toward, the light receiving unit is a transmitted light type line sensor having a light receiving element arranged on a straight line parallel to the straight line, That abnormality detection device.

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