JPH0346990A - Threshold for elevator cage floor - Google Patents

Abstract

PURPOSE:To prevent the freezing of water and snow in a guide groove so as to dispense with removing work by forming the bottom face of a sliding door guide groove into an inclined face so as to position a discharge opening low and disposing a heat insulating cable adjacent to the guide groove across its whole length. CONSTITUTION:A threshold 8 is provided at the tip of the entry-exit side of a cage floor 2. The threshold 8 is provided with a guide groove 9 to be engaged with a guide piece at the lower end of a sliding door. A discharge opening 10 is provided at the bottom face of the guide groove 9, and the bottom face is formed into an inclined face so that discharge opening is positioned lower to discharge water speedily. Adjacent to the guide groove 9, a square through hole 11 is provided across the whole length of the threshold 8 and has a heat insulating cable 13 made of a coated resistance wire built therein. Ice and snow accumulated in the guide groove 9 is therefore melted even in the wintertime and discharged from the discharge opening 10, so that the removing work of ice, snow, and the like is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heating device for the threshold of an elevator car floor installed in a cold region.

(Prior Art) A conventional elevator car floor sill will be described with reference to FIG.

An elevator car 1 has a side wall composed of a side plate 3 set up on a floor 2, and a ceiling 4 is placed on the side plate 2 to form the car 1.

A sliding door 5 is hung at the entrance of the car 1, and the sliding door 5 is opened and closed by a driving device 6 while a guide piece 7 attached to the lower end of the door is guided by a guide groove 9 of a sill 8 of the entrance.

There is a discharge hole 10 at the bottom of the guide 7119, through which dust and the like accumulated in the guide groove 9 are discharged.

(Problem to be solved by the invention) Recently, due to tourism development, etc., elevators have been increasingly installed in cold regions and facilities such as ski resorts. Measures must be taken to deal with freezing snow.

In the above-mentioned elevator, water droplets and snow particles that adhere to passengers and are carried into the car accumulate in the guide groove of the sill and freeze, obstructing the operation of the door guide piece and making it impossible to open and close the door. , there is a risk that the elevator will stop operating.

In addition, to prevent such accidents, work is carried out regularly to remove snow, ice, etc., but the work is difficult and elevator operation will be temporarily suspended during the work.
This will cause inconvenience to passengers.

An object of the present invention is to prevent water and snow from freezing in the guide groove and to eliminate the need for periodic ice removal work.

[Structure of the invention]

(Means for Solving the Problems) In the present invention, the bottom surface of the guide groove of the sill provided in the elevator car floor is formed into an inclined surface, a discharge hole is provided at the lowest position of the inclined surface, and the bottom surface is provided adjacent to the guide groove. A through hole is provided along the entire length of the threshold, and a heat insulation cable made of a coated resistance wire is buried inside the hole.

<Function> Water droplets and snowflakes that adhere to passengers and are carried into the guide groove of the sill are thawed without freezing by the insulation cable buried in the guide groove, become running water, and are discharged from the discharge hole of the guide groove.

Furthermore, if the inside of the groove becomes frozen while the elevator is stopped at night, the ice is thawed using the heat insulating cable before the elevator starts operating.

(Example) The present invention will be described based on an example according to the present invention shown in FIGS. 1 and 2.

There is a sill 8 at the end of the elevator car floor 2 on the entrance side, and a guide groove 9 in which the guide piece 7 attached to the lower end of the sliding door 5 engages.
is the provision.

The guide 71i9 is provided with a discharge hole 10 for discharging dust and the like during normal operation, and the bottom surface of the guide 7119 is sloped with the discharge hole 10 at a lower position to form an inclined flow path to the discharge hole 10. Adjacent to the guide groove 9, a rectangular through hole 11
is provided over the entire length of the threshold, and a heat insulation cable 13 made of a coated resistance wire is buried inside.

With this configuration, if water droplets or snowflakes that adhere to passengers and are carried into the car 1 accumulate in the guide groove 9 of the sill 8,
As the sill is heated by the electric heat from the insulation cable, ice and snow melt, flow, and are discharged through the exhaust hole.

If snow or water accumulated on the sill freezes when the elevator stops operating at night, the sill is heated by the heat insulating cable to thaw the ice before the elevator starts operating, and then the elevator starts operating.

Of course, all of these operations can also be performed electrically.

A similar effect can be obtained by providing a groove having a concave cross section in place of the through hole 11 adjacent to the guide groove 10 and laying the heat insulating cable 13 therein.

As another example, as shown in FIG. 3, in the step of slanting the guide groove 9, silicon filler 14 is poured into the guide groove 9 and solidified while the sill 8 is tilted at the desired slope. A smooth sloped surface can be easily formed.

Further, in another embodiment shown in FIG. 4, a drainage receiver 15 and a drainage gutter 16 are connected to the lower part of the drainage hole 10 provided in the guide groove 9, making it possible to guide drainage to any direction and location. This is what I did.

Furthermore, as another embodiment, the heat insulation cable 13
A timer is incorporated into the power supply circuit of the elevator, and the power supply of the heat insulation cable 13 is switched in accordance with the operating time of the elevator, thereby saving power and achieving efficient operation.

Although the sill 8 on the car floor 2 side has been described above, the same effects can be obtained by applying the same facilities and treatments to the sill on the bathing water side.

〔Effect of the invention〕

By melting and draining the ice that forms on the sill of the elevator car floor, the present invention prevents the doors from being unable to open and close due to freezing, eliminates the need for periodic ice removal work, and improves the efficiency of elevators in cold and snowy areas. Safe operation can be ensured.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of the sill of a car floor according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3UjJ, and FIG. The figure is a schematic side view of a conventional cage. 1... Car 2... Car floor 5... Door
7... Guide piece 8... Threshold
9...Guide groove 10...Drain hole 11...Through hole 13...Heat insulation cable 14...Filling material

Claims (1)

[Claims] At the sill of the car floor, which has a guide groove for guiding a guide piece attached to the lower end of the door for entrance/exit of the elevator car, and a discharge hole at the bottom of the guide groove, the slope surface with the discharge hole at a lower level is used as the guide. A sill of an elevator car floor, characterized in that a heat insulating cable is provided adjacent to the bottom surface of the guide groove over the entire length of the guide groove.