JPS6122940Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a safety device for escalators.
Escalator safety, especially for ascending escalators, to prevent passengers leaning into the triangular space formed between the upper floor of the building or other escalators that intersect adjacently from being trapped. Regarding equipment.

In general, an escalator, as shown in Fig. 1, has steps 2 that operate continuously between the upper and lower entrances 1 and 1;
It consists of a handrail 3 installed on both sides, and a moving handrail 4 that moves at the same speed and in the same direction as the stairs 2, and is placed diagonally across the lower floor 5 and upper floor 6 of the building. It is installed to transport passengers up and down between the upper and lower entrances 1 and 1.

In order to minimize the installation area, these escalators are often installed with the upper floor 6 of the building and the moving handrail 4 close to each other. A triangular space 7 is generated. Therefore, if a passenger leans a part of his or her body outside the moving handrail 4 while the escalator is operating upward, there is a risk that the passenger will be caught in the triangular space 7 and seriously injured. Although not shown, this also applies to the triangular space formed by the exterior of one escalator and the moving handrail of the other escalator, which are installed adjacent to each other in a crossing manner.

Therefore, in order to prevent passengers' bodies from getting caught in such a triangular space 7, conventionally, as shown in FIGS. Alternatively, a triangular protection plate (usually referred to as a triangular guard plate or wedge guard) 8 is suspended or supported from a fixed part of the parapet 3 on the movable handrail side. As a result, in the event that a passenger leans out of the handrail 4 and approaches the top of the triangular space 7, a part of the passenger's body will come into contact with the triangular protection plate 8, and the passenger will be protected. A detection device is provided which alerts the passenger to danger and urges the passenger to return the body to a normal state, or which is activated by being pushed by the passenger's body when the tip of the triangular protection plate 8 comes into contact with the passenger's body. Measures have been taken to stop escalators.

However, with this method, a part of the passenger's body must come into contact with the triangular protection plate 8 in order to notify the passenger of the danger, and the passenger feels some discomfort. Moreover, the design quality of the escalator will also be impaired.

On the other hand, as shown in FIG. 3, on the lower side of the movable handrail 4 near the top of the triangular space 7, a load-sensing safety switch 10 is installed by cutting out the handrail guide rail 9 provided at the upper end of the handrail 3. 47-34986, or, as shown in FIG. Utility Model Publication No. 53-869 is already known, which is configured to move as if sinking against elasticity, and is equipped with a safety switch 10 that detects the amount of movement, in which passengers do not move their bodies outside of the moving handrail 4. If an abnormal load is applied to the movable handrail 4, such as when a part of the escalator protrudes, a safety switch 10 is activated to stop the escalator.

However, with these methods, the safety switch 10
If the detected load value is set to , the detected load becomes constant and the safety switch 10 operates on the same basis in all situations, and it is conceivable that the safety switch 10 may operate even in situations other than those that are truly dangerous. Furthermore, if the measures are to be changed depending on the situation, two or more safety switches 10 set to at least two types of load values are required.

Furthermore, the moving handrail 4 of an escalator generally has a structure in which fibers such as cotton canvas are hardened with synthetic rubber and further covered with decorative rubber made of synthetic rubber, and because it has relatively high rigidity, it cannot be locally deformed. It is extremely difficult. For this reason, in the configuration as shown in FIG. 3, it is difficult to locally deform the movable handrail 4 in order to operate the safety switch 10, and it is conceivable that the safety switch cannot be operated reliably.

This invention improves the above points, and can ensure safety only in truly dangerous cases without damaging the design of the escalator or touching any part of the passenger's body. It provides equipment.

An embodiment of this invention will be described below with reference to FIGS. 5 to 7. In the figure, reference numeral 12 denotes a handrail guide rail that is fixed to the upper end of the parapet 3 and guides the movable handrail 4. Near the top, that is, from the apex A of the triangular space 7 to the side of the lower floor, a suitable length B corresponding to the most dangerous part of the space 7, and from the apex A to the side of the upper floor. An appropriate length C is removed to prevent the occurrence of target bending, and a recess 13 is formed there by cutting out the upper end portion of the handrail 3 by an appropriate depth D. By disposing it in this recess 13, two upper and lower lever-shaped handrail guide rails 14 and 15 are provided so as to be interposed in the middle of the fixed handrail guide rail 12. Here, the lower lever-shaped handrail guide rail 14 is disposed over the range of dimension B within the recess 13, and is rotatable about the inclined downward side end E on the lower floor side from point A as a fulcrum. The tip on the opposite side is always elastically floated and supported by the spring body 16, and the upper lever-shaped handrail guide rail 15 is arranged over the range of dimension C in the recess 13, and the end on the upper floor side from point A It is rotatable about F as a fulcrum, and the tip on the opposite side is always elastically floated and supported by a spring body 17. In addition, 18, 18 in the figure
is a shaft that serves as a fulcrum for the lever-shaped handrail guide rails 14 and 15, each of which is supported by a support 20 fixed to the inside 3a of the handrail 3 by a fastener 19. In addition, 21 and 21 in the figure are spring bodies 16 and 1 on the tip sides of the lever-type handrail guide rails 14 and 15.
This is a chain that prevents unnecessarily lifting up due to the pressure of 7. With this chain, both lever type handrail guide rails 14 and 15 are fixed handrail guide rail 1 in normal times.
The movable handrail 4 is guided while maintaining the height flush with the handrail 2. In addition, the spring body 16,1
7 is selected to have an appropriate spring constant so that when an abnormal load is applied to the movable handrail 4, the lever-type handrail guide rails 14, 15 can rotate against the spring body. Here, reference numeral 22 in the figure is a limit switch fixed to the upper interior 3a of the handrail 3 to be activated in response to the rotation of the lower lever-type handrail guide rail 14 to sink within a predetermined range. A signal is now issued to stop the escalator.

Therefore, in the safety device having the above-described structure, if a passenger leans a part of his or her body outside the movable handrail 4 at a relatively low safety position near the top of the triangular space 7, If an abnormal load is applied, the lever-type handrail guide rail 14 immediately rotates to sink against the spring body 16 and actuates the limit switch 22, which stops the escalator and allows the user to lean forward. It is possible to prevent the danger of a passenger being trapped in the narrow part at the top of the triangular space 7.

Furthermore, if a passenger leans a part of his or her body outward in a relatively safe place that is slightly farther downward from the top of the triangular space 7, an abnormal load will be applied to the handrail 4 itself; Since the load application position is close to the fulcrum of the lever-type handrail guide rail 14, the rotation of the lever-type handrail guide rail 14 is small and does not reach the point where the limit switch 11 is activated. If the passenger feels the danger of being trapped in the triangular space 7 and withdraws his/her body immediately, the escalator continues to operate without incident. However, when the passenger climbs up without feeling any danger and moves toward the top of the triangular space 7 where safety is low, the handrail 4
Since the point of application of such abnormal load shifts toward the tip of the lever-type handrail guide rail 14, the moment around the fulcrum increases accordingly, causing the lever-type handrail guide rail 14 to resist the spring body 16. The escalator rotates so as to sink significantly, and the limit switch 22 is activated to stop the escalator.

Furthermore, as mentioned above, even in a relatively safe place far away from the top of the triangular space 7, if the passenger leans heavily, that is, even if the passenger notices the triangular space 7, the passenger may If it takes time to return the moving handrail 4 to its normal position, the lever-type handrail guide rail 14 will rotate significantly and the limit switch 22 will be activated to stop the escalator from operating. Can be stopped.

Furthermore, when the lever-type handrail guide rail 14 rotates due to the deflection of the movable handrail 4 due to the above-mentioned abnormal load, since the lever-type handrail guide rail 15 is also disposed above and opposite the lever-type handrail guide rail 14, even if the lever-type handrail guide rail 14 Even the movable handrail 4, which is difficult to deform, can be smoothly deformed along both the upper and lower lever-type handrail guide rails 14, 15, making it possible to accurately transmit the load acting on the movable handrail 4 to the lever-type handrail guide rail 14. Therefore, the operation of the limit switch 22 can be ensured.

Note that this invention is not limited to the above embodiment, but as shown in FIG. 8, handrail guide rollers 23 are provided at each end of the lever-type handrail guide rails 14, 15, and the joints of each rail are The movement of the movable handrail 4 in that part may be made smooth.

Further, although only one limit switch 22 is provided for stopping the escalator operation, two or more limit switches (not shown) may be provided, and the mounting position or contact position of each limit switch may be appropriately selected. When the limit switch is activated, an alarm may be issued or a caution light may be flashed to alert passengers, and the escalator may be stopped when the final limit switch is activated.

Since this device was developed as detailed above, it is possible to extremely accurately detect a truly dangerous situation without damaging the design of the escalator or touching any part of the passenger's body. This will ensure safety.

[Brief explanation of the drawing]

Fig. 1 is a general schematic diagram showing an example of an escalator installed, and Figs. 2 a and b are side views showing different examples of protective plates provided as a safety measure in a conventional triangular space. , FIG. 3 and FIG. 4 are partially sectional views of a parapet using different conventional safety devices, FIG. 5 is a partially sectional side view showing an embodiment of this invention, and FIG. 6 5 is a sectional view taken along the - line in FIG. 5, FIG. 7 is a sectional view taken along the - line in FIG. 5, and FIG. 8 is a partially sectional side view showing another embodiment of this invention. 3... Balustrade, 4... Movable handrail, 6... Upper floor of building, 7... Triangular space, 12... Handrail guide rail, 14... Lever-shaped handrail guide rail, 16... Spring body , 22... limit switch, 23... handrail guide roller.

Claims (1)

[Scope of utility model registration request] In an escalator in which a movable handrail is provided via a fixed handrail guide rail on the outer periphery of the escalator's handrail that extends in an inclined state between the upper and lower floors of a building, the movable handrail of the handrail intersects with the movable handrail of the handrail on the upper floor of the building or adjacently. From a position corresponding to the top of the triangular space formed by the exterior part of the escalator, along the slope of the handrail in the vertical direction, respectively, within a length range that does not cause local bending of the moving handrail. A recessed portion where the fixed handrail guide rail does not exist is provided, and a pair of upper and lower lever-shaped handrail guide rails each having a length of slightly less than half the total length of the recessed portion are separated from each other along the longitudinal direction within the recessed portion. The upper and lower lever-type handrail guide rails are arranged in series in an independent state, and the opposite ends of the upper and lower lever-type handrail guide rails are rotatably supported on supports protruding from the parapet, respectively. The pair of upper and lower lever-shaped handrail guide rails is held at the same level as the fixed handrail guide rail by elastically supporting the opposite end portions by push-up spring bodies disposed between the inner bottom surfaces of the recesses. and a limit switch that issues an alarm or issues a signal to stop escalator operation in response to the rotation of at least the lower lever-type handrail guide rail against the push-up spring body. Escalator safety device.