JP2010163264A - Safety device for escalator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for an escalator, for detecting the abnormality and stopping automatic operation of the escalator in an initial stage just before a foreign material such as shoes of a user or a lower end of a skirt of clothes intrudes into a clearance between a step and a rubber or a clearance between a comb and a skirt guard. <P>SOLUTION: This safety device for the escalator includes: a photoelectric device 8 formed of a light projecting element 8a provided in the skirt guard 5 adjacent to one side of a step 4 and a light receiving element 8b provided in the other end of the step 4 to a receive photoelectric beam 9 from the light projecting element 8a and for outputting an operating signal when the photoelectric beam 9 is shut; and a safety device 10 including a shutting means for shutting power supply to the escalator based on the operating signal from the photoelectric device 8. The photoelectric device 8 radiates the photoelectric beam 9 onto the top surface of the step 4 near the tip of the comb 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an escalator safety device.

  In general, an escalator has a user sandwiching the bottom edge of shoes or clothing in the gap between a step and a comb, or a comb and a skirt guard, etc. When an abnormality occurs, a safety device is provided to detect the trapped foreign matter and stop the escalator during automatic operation.

  Conventionally, as a safety device, as shown in FIG. 5, in a portion located on both sides of a gap 53 formed between the tip of a comb mounting beam 51 provided on the lower side of the boarding plate 50 and the lower surface of the comb 52. The light emitting element 54 and the light receiving element 55 are arranged symmetrically, and when a foreign object enters between the lower surface of the comb 52 and the upper surface of the step 56, the light receiving element 55 is operated by the foreign object to stop the escalator. (For example, refer to Patent Document 1).

JP-A-9-2771 (paragraph 0031, FIG. 2)

  The escalator safety device disclosed in Patent Document 1 is a case where foreign matter enters between the lower surface of the comb 52 and the upper surface of the step 56 by the photoelectric device including the light emitting element 54 and the light receiving element 55 to block the photoelectric beam. In addition, the automatic operation of the escalator is stopped. Therefore, it is effective for detecting foreign matter that has entered the lower surface of the comb 52, but there is a problem that it cannot be detected even if the user on the step 56 encounters an accident.

  The present invention has been made to solve the above-described problems of the prior art. Immediately before a foreign object such as a user's shoes or the lower end of a hem of a clothing enters a gap between a step and a comb or a comb and a skirt guard. An escalator safety device that detects the occurrence of an abnormality and stops the automatic operation of the escalator at the initial stage of is provided.

  The escalator safety device according to the present invention includes a skirt guard adjacent to both sides of a step, and the escalator having an abnormality in the escalator including a comb having a plurality of grooves loosely fitted in a cleat portion formed on an upper surface of the step. An escalator safety device for stopping the light from a light projecting element provided on a skirt guard adjacent to one side of the step and a light receiving element provided on the other side of the step and receiving a photoelectric beam of the light projecting element An escalator safety device comprising: a photoelectric device that outputs an operation signal when the photoelectric beam is interrupted; and a safety device that includes a shut-off unit that interrupts power supply to the escalator by the operation signal of the photoelectric device. The photoelectric device is placed on the top surface of the step near the tip of the comb. It is intended to illuminate the over-time.

  According to this invention, since an abnormality can be detected at an initial stage immediately before a foreign object such as a user's shoe enters a gap between a step and a comb or a comb and a skirt guard, an early abnormality countermeasure Is possible.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an escalator safety device according to the invention will be described with reference to the accompanying drawings. The present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a view for explaining an escalator safety device according to Embodiment 1 of the present invention, and is a longitudinal sectional view showing an upper floor side of an escalator. In FIG. 1, a boarding board 2 is installed on the upper part of the upper floor side of a truss (not shown), with the upper surface on the right end being flush with the floor surface 1 of the upper floor side. A comb mounting beam (not shown) is fixed to the truss on the lower floor side of the boarding board 2 and the comb 3 is fixed to the comb mounting beam. In addition, the comb 3 is arrange | positioned and fixed to the front-end | tip part of the lower floor side of the boarding / alighting board 2. FIG.

  A skirt guard 5 fixed to the truss is erected adjacent to both ends of the comb 3 and the step 4, and a balustrade 6 is symmetrically erected above the skirt guard 5. On the outer periphery of the balustrade 6, a moving handrail 7 that is driven in synchronization with the step 4 is provided. Note that the step 4 and the moving handrail 7 are driven by a drive source composed of an induction motor, a speed reducer, etc. (not shown).

  FIG. 2 is a partially enlarged view of FIG. 1 and shows the vicinity of the comb 3 and the step 4 disposed at the lower end of the lower floor on the boarding board 2. In FIG. 2, the comb 3 has a plurality of grooves continuously formed in the front-rear direction on the lower surface of the tip portion thereof, and a lower portion of these grooves is allowed to play a cleat portion protruding in a comb shape on the upper surface of the step 4. It is assembled by fitting. A plurality of the combs 3 are arranged in parallel in the front and back directions of FIG. 2 and fixed to the comb mounting beams, respectively, and when the step 4 moves, the feet of the user who rides on the upper end surface of the cleat portion of the step 4 are placed. Has a function of scooping from the bottom. Note that the comb 3 is generally formed of a resin molded product, and a thin portion is formed at an intermediate portion thereof, so that the user is sandwiched between the tip portion of the comb 3 and the cleat portion of step 4. In some cases, it is easily deformed to minimize user injuries and the like.

  Further, the escalator safety device according to the first embodiment is provided with a photoelectric device 8 that irradiates a photoelectric beam on the upper surface portion of step 4 in the vicinity of the tip portion of the comb 3 as shown in FIG. The photoelectric device 8 includes a light projecting element 8a and a light receiving element 8b that receives the photoelectric beam. The light projecting element 8a and the light receiving element 8b are attached to the inside of the left and right skirt guards 5, respectively. . Then, a plurality of beam irradiation holes are formed in the skirt guard 5, and a plurality of light projecting elements 8a and light receiving elements 8b allow a plurality of beam irradiation holes to be formed on the upper surface of step 4 near the tip of the comb 3. A so-called multi-beam method in which a photoelectric beam is irradiated is employed.

  3 and 4 are views for explaining the mounting positions of the light projecting element 8a and the light receiving element 8b of the photoelectric device 8 to the skirt guard 5, FIG. 3 is a plan view, and FIG. 4 is a front view. According to the inventor's experiment, as shown in FIGS. 3 and 4, the photoelectric device 8 has a tip of the comb 3 of about 50 mm and the photoelectric beam 9 passes through a position about 30 mm from the top surface of the step 4. It is preferable to attach the light projecting element 8a and the light receiving element 8b.

  A safety circuit 10 serving as a safety device is connected to the photoelectric device 8, and when the photoelectric device 8 is activated by detecting a foreign object, an operation signal is output to the safety circuit 10 and an escalator incorporated in the safety circuit 10. The power supply to the escalator is configured to be shut off by operating a shut-off means for shutting off the power feed to the escalator, for example, a switch. The operation start time of the photoelectric device 8, that is, the time from when the photoelectric beam 9 of the photoelectric device 8 is interrupted until the photoelectric device 8 determines abnormality and outputs the abnormality signal to the safety circuit 10 can be arbitrarily set. It is configured as follows.

  In the escalator safety device configured as described above, the luminous flux irradiated to the light receiving element 8b from the light projecting element 8a of the photoelectric device 8 is determined by a foreign object such as a user's shoes or the bottom of the hem of clothes. For example, when it is interrupted for 5 seconds or more, the photoelectric device 8 determines that it is abnormal and outputs an abnormal signal to the safety circuit 10. Upon receiving this abnormal signal, the safety circuit 10 turns off the built-in switch and stops the escalator during automatic operation.

  In the above description, the example in which the photoelectric device 8 having the pair of the light projecting element 8a and the light receiving element 8b that receives the photoelectric beam 9 is provided on the upper floor side of the escalator has been described. It may be provided on the side, and is usually installed on both the upper floor side and the lower floor side.

  As described above, according to the escalator safety device according to the first embodiment, the initial state immediately before the user's shoes or the lower end of the garment hem enters the gap between the step and the comb or the comb and the skirt guard. In the stage, the occurrence of abnormality is detected and the escalator is stopped, so that early abnormality countermeasures are possible.

  In addition, since the plurality of photoelectric beams 9 are irradiated from the light projecting element 8a to the light receiving element 8b of the photoelectric device 8, the accuracy of abnormality detection can be improved, and further, the photoelectric beam 9 is interrupted after the photoelectric beam 9 is interrupted. Since the operation time until the apparatus 8 determines the abnormality can be arbitrarily set, the operation time until the abnormality determination can be set according to the installation condition of the escalator.

It is a figure explaining the escalator safety device which concerns on Embodiment 1 of this invention. It is the elements on larger scale of FIG. It is a top view explaining the attachment position of the photoelectric device in the escalator safety device which concerns on Embodiment 1 of this invention. It is a front view explaining the attachment position of the photoelectric device in the escalator safety device which concerns on Embodiment 1 of this invention. It is a figure explaining the conventional escalator safety device.

DESCRIPTION OF SYMBOLS 1 Floor surface 2, 50 Boarding board 3, 52 Comb 4, 56 Step 5 Skirt guard 6 Railing 7 Moving handrail 8 Photoelectric device 8a Light emitting element 8b, 55 Light receiving element 9 Photoelectric beam 10 Safety device 51 Comb mounting beam 53 Gap 54 Light emission element

Claims (3)

An escalator safety device for stopping an escalator when an escalator abnormality occurs, comprising a skirt guard adjacent to both sides of the step and a comb having a plurality of grooves loosely fitted in a cleat portion formed on the upper surface of the step. ,
When a light projecting element provided on a skirt guard adjacent to one side of the step and a light receiving element provided on the other side of the step for receiving the photoelectric beam of the light projecting element, the photoelectric beam is interrupted A photoelectric device that outputs an operation signal to
In an escalator safety device comprising a safety device having a shut-off means for shutting off power supply to the escalator by an operation signal of the photoelectric device,
2. The escalator safety device according to claim 1, wherein the photoelectric device irradiates a photoelectric beam on an upper surface portion of the step in the vicinity of a tip portion of the comb.   The photoelectric device includes a plurality of light projecting elements and light receiving elements, and a plurality of beam irradiation holes are formed in the skirt guard, and a photoelectric beam is irradiated from the plurality of beam irradiation holes. The escalator safety device according to 1.   The escalator safety device according to claim 1, wherein the photoelectric device can arbitrarily set a time from when the photoelectric beam is interrupted until the safety device is operated.

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