JP2011178525A - Device for preventing user from being drawn by escalator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive device for preventing the user from being involved by an escalator which warns before a shoe or clothes are drawn between a step and a skirt guard. <P>SOLUTION: This device for preventing the user from being drawn by an escalator includes a distance sensor which is fixed to the side surface of an inner deck and measures the distance between itself and a demarcation cleat or a cleat riser on the upper surface of the step, a foreign matter approach detection part for determining that foreign matters are approaching between the step and the skirt guard when the measured distance is changed irregularly, and a reminder part which calls for attention when the foreign matter approach detection part determines to be approaching. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an escalator pull-in prevention device for preventing shoes or clothes from being pulled in between an escalator step and a skirt guard.

In the escalator, the user is not aware that the user is too close to the skirt guard, and there is a possibility that a user disaster may occur when shoes, clothes, etc. are drawn between the skirt guard and the step.
Therefore, a light sensor is built in the inner deck, and a reflector is installed on the side of the step. The light emitted from the light sensor passes between the step and the skirt guard, reflects off the reflector, and returns to the light. There has been proposed an escalator safety protection device that detects that shoes or clothes are drawn between a step and a skirt guard by receiving light and stops the escalator (see, for example, Patent Document 1).

  Further, in the passenger conveyor device, the step position detecting device for detecting that the step is in the specific position, the object detecting device for detecting that the object on the step tread has approached the skirt guard panel, and the step are in the specific position. And a warning device that issues a warning in the vicinity of the object detection device when the object detection device detects an object while the step position detection device detects this (see, for example, Patent Document 2).

JP-A-8-12238 JP 2009-179448 A

However, the escalator safety protection device described in Patent Document 1 cannot be applied unless there is a gap between the step and the skirt guard, and when detecting, the shoes and clothes have already moved between the step and the skirt guard. There is a problem that the alarm timing is too late.
Moreover, in the passenger conveyor apparatus of patent document 2, there exists a problem that an object detection apparatus must be arrange | positioned in the position of the half rank of the step connected endlessly, and a big cost starts.

  The present invention has been made to solve the above-described problems, and is to obtain an inexpensive escalator retraction prevention device that issues an alarm before shoes or clothes are retracted between a step and a skirt guard. Objective.

  The escalator pull-in prevention device according to the present invention is fixed to the side surface of the inner deck and measures the distance between the demarcation cleat or the cleat riser on the upper surface of the step, and the measured distances are irregular. A foreign object approach detection unit that determines that a foreign object is approaching between the step and the skirt guard when changed and a caution ventilation unit that alerts the user when it is determined that the foreign object is approaching.

  The escalator pull-in prevention device according to the present invention detects an irregular change in the regularly changing distance between an arbitrary position on the side surface of the inner deck and the demarcation cleat or the cleat riser on the upper surface of the step. Since it can be determined that the foreign substance is approaching between the step and the step guard, the escalator can be prevented from being pulled in at a low cost.

It is a block diagram of the escalator pull-in prevention apparatus which concerns on Embodiment 1 of this invention. The state of measuring the distance to the demarcation cleat by the distance sensor is shown. This shows how the distance between the demarcation cleat measured by the distance sensor changes. The state of the change of the distance between the demarcation cleat measured by the distance sensor when a foreign object exists on the demarcation cleat is shown. This is the difference between the reference distance and the measured distance. It is a block diagram of the escalator pull-in prevention apparatus which concerns on Embodiment 2 of this invention. The mode of the change of the distance between cleat risers by a distance sensor is shown. It is a block diagram of the escalator pull-in prevention apparatus which concerns on Embodiment 3 of this invention.

Hereinafter, preferred embodiments of an escalator pull-in prevention device of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a configuration diagram of an escalator pull-in prevention device according to Embodiment 1 of the present invention.
The escalator according to the present invention includes a plurality of steps 2 connected endlessly, an inner deck 3, and a skirt guard 4 extending downward from the lower end of the inner deck 3. In the following description, the present invention will be described with reference to an example in which the present invention is applied to an escalator that operates between upper and lower floors.
On the upper surface of step 2, a demarcation cleat 5 is disposed on the side facing the skirt guard 4.

The escalator pull-in prevention device according to Embodiment 1 of the present invention is disposed at the lower end of the inner deck 3 so as to protrude toward the step 2 side, and measures the distance toward the demarcation cleat 5 in step 2. And a foreign matter detector 7 for detecting whether or not a foreign matter such as shoes or clothes is approaching the skirt guard 4 based on the distance measured by the distance sensor 6, and the foreign matter is approaching the skirt guard 4. And an alerting unit 8 that alerts the user when detected.
The distance sensor 6 is an infrared sensor that irradiates infrared rays toward the demarcation cleat 5 in step 2 from above, and when there is no foreign matter on the demarcation cleat 5, the infrared rays are demagnetized as shown in FIG. When the foreign material 10 is reflected on the demarcation cleat 5 and on the demarcation cleat 5, the infrared light is reflected on the foreign material 10 as shown in FIG. 5 or the distance to the foreign object 10 is measured. The distance sensor 6 is not limited to an infrared sensor, and any sensor that can measure a distance, such as an ultrasonic sensor, can be used.

  If the distance between the distance sensor 6 and the demarcation cleat 5 is not debris on the demarcation cleat 5, the speed of the step 2 that travels except the vicinity of the entrance / exit is almost constant. As shown in a), it changes like a triangular wave. When there is a point irradiated with infrared light on one step 2 demarcation cleat 5 that rises, the distance decreases at a constant reduction rate. Then, when the point irradiated with infrared rays reaches the end of step 2, the demarcation cleat 5 of step 2 that rises next is irradiated, so the distance increases instantaneously.

  On the other hand, when the distance sensor 6 is arranged in the vicinity of the entrance / exit, since the step 2 moves horizontally, if there is no foreign matter on the demarcation cleat 5, the distance remains constant as shown in FIG. To do.

Next, a change in distance when a foreign object 10, such as a shoe, is placed on the demarcation cleat 5 will be described.
First, the distance measured when the distance sensor 6 is arranged where the ascending speed is substantially constant except in the vicinity of the entrance / exit and the step 2 rises will be described.
Since the distance is shorter by the thickness of the shoe than when there is no foreign matter on the demarcation cleat 5, as shown in FIG. 4 (a), the distance when it is confirmed that there is no foreign matter on the demarcation cleat 5 is used as a reference. If so, the presence of shoes can be detected.

  When comparing the reference distance and the measured distance, the time points at which a sudden change in distance seen between adjacent steps 2 occurs are aligned. Then, when there is no foreign matter on the demarcation cleat 5, the difference between the reference distance and the measured distance is almost zero as shown by the dotted line in FIG. On the other hand, when there is a shoe on the demarcation cleat 5, as indicated by a solid line in FIG. 5A, a difference between the reference distance and the measured distance is generated by the thickness of the shoe.

Next, the distance measured when the distance sensor 6 is arranged above the step 2 that translates in the vicinity of the entrance / exit will be described.
Since the distance is shorter by the thickness of the shoe than when there is no foreign matter on the demarcation cleat 5, as shown in FIG. 4 (b), the distance when it is confirmed that there is no foreign matter on the demarcation cleat 5 is used as a reference. If so, the presence of shoes can be detected.

  When comparing the reference distance with the measured distance, the reference distance is always constant, so when there is no foreign object on the demarcation cleat 5, as shown by the dotted line in FIG. The difference between the reference distance and the measured distance is almost zero. On the other hand, when there is a shoe on the demarcation cleat 5, as indicated by a solid line in FIG. 5B, a difference between the reference distance and the measured distance is generated by the thickness of the shoe.

The foreign matter detection unit 7 measures the distance after confirming that no foreign matter is present on the demarcation cleat during the trial run or start of the escalator, and stores it as a reference distance.
Further, the foreign matter detection unit 7 takes in the measured distance when the escalator is normally operated, calculates the difference between the distance measured with the reference time and the reference distance, and the difference is equal to or greater than a predetermined threshold value. At this time, the shoes on the demarcation cleat 5 are detected.

  The reference distance may be obtained by measuring when the foreign object 10 is not placed on the demarcation cleat 5 as described above, but is obtained from the specifications such as the inclination angle, speed, and depth in step 2. May be.

The escalator pull-in prevention device according to Embodiment 1 of the present invention obtains an inexpensive escalator pull-in prevention device that issues an alarm before shoes or clothes are pulled between the step 2 and the skirt guard 4.
Moreover, since it is sufficient to install one distance sensor 6 at least at the location of the escalator where the foreign material 10 is easily drawn in, it can be drawn in at a low cost and a countermeasure can be taken.

  Note that the number of the distance sensors 6 may be determined as appropriate in consideration of the usage status of the escalator.

Embodiment 2. FIG.
FIG. 6 is a configuration diagram of an escalator pull-in prevention device according to Embodiment 2 of the present invention.
The escalator pull-in prevention device according to Embodiment 2 of the present invention differs from the escalator pull-in prevention device according to Embodiment 1 of the present invention in that the distance measured by the distance sensor 6 is the same, and the rest is the same. The same reference numerals are appended to the parts, and the description is omitted.
The distance sensor 6 according to the second embodiment of the present invention is disposed so as to protrude to the step 2 side of the inner deck 3, irradiates infrared rays to the cleat riser 12 horizontally, and the foreign matter 10 is placed on the demarcation cleat 5 of step 2. Is not reflected, the infrared rays are reflected by the creatrizer 12, and the reflected infrared rays are received, and the distance to the creatrier 12 is measured.
When the foreign object 10 is placed on the demarcation cleat 5, the infrared light is reflected by the foreign object, and the reflected infrared light is received and the distance to the foreign object 10 is measured.

  The distance between the distance sensor 6 and the cleat riser 12 is as shown in FIG. 4 because, if there is no foreign matter on the demarcation cleat 5, the ascending speed is almost constant in the step 2 that travels except the vicinity of the entrance / exit. Like, it changes like a triangular wave. When one rising creater 12 is irradiated with infrared rays, the distance increases at an increasing rate of the curve. And when the point which infrared rays irradiate reaches the surface of a step, it will irradiate the next rising riser, so the distance will decrease in an instant.

Next, a change in distance when a foreign object 10, such as a shoe, is placed on the demarcation cleat 5 will be described.
First, the distance measured when the distance sensor is arranged at a place where the ascending speed is substantially constant except for the vicinity of the entrance / exit and the step rises will be described.
Since the distance is shorter by the thickness of the shoe than when there is no foreign matter on the demarcation cleat, the presence of the shoe can be detected based on the distance when it is confirmed that there is no foreign matter on the demarcation cleat.

Embodiment 3 FIG.
FIG. 8 is a configuration diagram of an escalator pull-in prevention device according to Embodiment 3 of the present invention.
The escalator pull-in prevention device according to Embodiment 3 of the present invention is arranged to protrude toward the step 2 side at the lower end of the inner deck 3 and measures two distances toward the demarcation cleat 5 in step 2 Based on the sensor 6, the distance measured by the two distance sensors 6, a foreign object detector 7 </ b> B for detecting whether or not the foreign object is approaching the skirt guard 4, and detecting that the foreign object is approaching the skirt guard 4 And an alerting unit 8 that alerts the user when it is done.
The two distance sensors 6 are arranged on the left and right inner decks 3 at positions symmetrical with respect to the direction in which step 2 proceeds. And the distance which each distance sensor 6 measures changes regularly as shown to Fig.3 (a), when there is no foreign material on the demarcation cleat 5 of both sides.

  On the other hand, when there is a foreign object on the demarcation cleat 5 on one side, the distance is shortened by the thickness of the foreign object 10 as shown in FIG. 4A, so the difference between the distances measured by the two distance sensors 6 is obtained. Thus, it can be detected that the foreign material 10 is present on the demarcation cleat 5 and is approaching the skirt guard 4.

  In the escalator pull-in prevention device according to Embodiment 3 of the present invention, since the distance sensor 6 is disposed at a symmetrical position, the foreign object 10 is detected by simply dividing the distance measured by the distance sensor 6. Can do.

  2 steps, 3 inner decks, 4 skirt guards, 5 demarcation cleats, 6 distance sensors, 7, 7B foreign matter detection section, 8 warning section, 10 foreign bodies, 12 creep riser.

Claims (3)

A distance sensor that is fixed to the side surface of the inner deck and measures the distance between the demarcation cleat or the cleat riser on the upper surface of the step;
A foreign object approach detection unit that determines that a foreign object is approaching between the step and the skirt guard when the measured distance changes irregularly;
A caution ventilator that calls attention when it is determined that a foreign object is approaching,
An escalator pull-in prevention device characterized by comprising:   2. The escalator pull-in prevention device according to claim 1, wherein a difference between a distance based on a reference point and a measured distance is obtained with reference to a time when the distance sensor moves to the subsequent measurement in the step. .   2. The escalator pull-in prevention device according to claim 1, wherein two distance sensors are arranged at positions symmetrical with respect to the advancing direction of the step.

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