Elevator

Abstract

An elevator includes at least one elevator car driving in an elevator shaft driven by an elevator drive. The elevator car has at least one car door and a door sill at the bottom of the car door, which door sill includes at least one groove, in which the car door is guided, in which groove at least one trash hole is located to prevent trash from accumulating in the groove, whereby the elevator car further includes a toe guard which extends downwards from the door sill. The trash hole is connected with a first upper end of an air channel extending downwards from the door sill and includes at least one channel portion extending with a direction component in a horizontal direction and/or having an opening directed sideward, which air channel is connected with the toe guard. The elevator leads to a reduced noise generation in the region of the door sill, particularly in elevator cars traveling with a high speed.

Claims

1. An elevator comprising: at least one elevator car driving in an elevator shaft driven by an elevator drive, wherein the at least one elevator car has at least one car door and a door sill at a bottom of the car door, the door sill comprising at least one groove, in which the car door is guided, in which groove at least one trash hole is located to prevent trash from accumulating in the groove, wherein the elevator car further comprises a toe guard extending with a direction component in a length direction of the elevator shaft, wherein each of the at least one trash hole is connected with a first upper end of an air channel extending downwards from the door sill, wherein the air channel comprises at least one channel portion extending with a direction component in a horizontal direction and an opening directed in the horizontal direction, the air channel is connected with the toe guard, and the air channel having an outlet opening at a second lower end thereof directed in the horizontal direction, wherein the horizontal direction is perpendicular to the length direction of the elevator shaft, and wherein the downward direction faces the bottom of the elevator shaft.

2. The elevator according to claim 1, wherein the air channel forms an acoustic labyrinth.

3. The elevator according to claim 2, wherein the groove of the door sill comprises at least one trash hole only in a central portion thereof, and wherein the central portion is located substantially at the center of both a length and a width of the groove.

4. The elevator according to claim 2, wherein the air channel forms a bracing element stiffening the toe guard.

5. The elevator according to claim 1, wherein the groove of the door sill comprises at least one trash hole only in a central portion thereof, and wherein the central portion is located substantially at the center of both a length and a width of the groove.

6. The elevator according to claim 5, wherein the toe guard comprises at least one plate-like member.

7. The elevator according to claim 6, wherein two trash holes are provided in the groove, wherein air channels of the two trash holes extend in a mutual angle of 25 to 90 degrees with respect to the length direction.

8. The elevator according to claim 6, wherein the air channel forms a bracing element stiffening the toe guard.

9. The elevator according to claim 5, wherein the air channel forms a bracing element stiffening the toe guard.

10. The elevator according to claim 1, wherein the air channel forms a bracing element stiffening the toe guard.

11. The elevator according to claim 10, wherein the air channel comprises or consist of a U-profile fixed the toe guard.

12. The elevator according to claim 1, wherein several trash holes are located in a central portion of the groove which are connected to several correlated air channels, which are tilted with respect to the length direction, and wherein the central portion is located substantially at the center of both a length and a width of the groove.

13. The elevator according to claim 1, wherein the air channels and toe guard are formed of sheet metal.

14. The elevator according to claim 1, wherein the toe guard and at least a part of the air channel extend from the door sill in the downward direction.

15. The elevator according to claim 1, wherein the groove does not have any trash holes outside a central portion of 30 cm, and wherein the central portion is located substantially at the center of both a length and a width of the groove.

16. The elevator according to claim 1, wherein the elevator comprises door rollers which run in the groove of the door sill.

17. The elevator according to claim 1, wherein the second lower end of the air channel does not have any opening extending downwards.

18. An elevator group comprising several of the elevators according to claim 1.

19. The elevator according to claim 1, wherein several trash holes are located in a central portion of the groove which are connected to several correlated air channels, which are tilted with respect to the length direction at an angle of 10 to 45 degrees and wherein the central portion is located substantially at the center of both a length and a width of the groove.

20. The elevator according to claim 1, wherein the groove does not have any trash holes outside a central portion of 20 cm, and wherein the central portion is located substantially at the center of both a length and a width of the groove.

Description

(1) The invention is now described in the drawings by means of an example, wherein

(2) FIG. 1 shows a vertical section of a part of an elevator car in the region of the door sill and toe guard,

(3) FIG. 2 shows a vertical section II-II from FIG. 1, and

(4) FIG. 3 shows a top view III from FIG. 1.

(5) FIG. 1 shows the floor 10 of an elevator car which is at the car door side terminated by a door sill 12 having two parallel grooves 14, 16 for guiding the car doors between their open and closed position. The two grooves 14, 16 have two trash holes 20a, 20b, 22a, 22b respectively, which are on their bottom side connected with a horizontally extending first portion 23a, 23b of an air channel 24a, 24b. The first portion 23a,b has a sloped bottom to assist the trash entering through the trash-hole(s) to advance to a vertically extending second portion 25a, 25b which is also tilted with respect to the vertical by about 15 degrees (See FIG. 2). The air channels 24a, 24b are embodied as a U-profile made of a metal sheet, which profile has flat extensions 26 which with the second air channel portion 25a, 25b is welded to a toe guard 28. The toe guard 28 has a first upper portion 29 extending from the front edge of the door sill 12 vertically downwards and a second lower portion 30 which is directed vertically downwards but slightly tilted inwards to the car. The air channel 24 has at its lower end 34 an outlet opening 32 which is open to the side, i.e. extending horizontally (their normal vector pointing horizontally, which means the edges of the opening lying in a vertical plane), so that air cannot enter the air channel directly from below as the lower end 34 of the air channels 24a, 24b closes to the bent portion 30 of the toe guard plate 28.

(6) Both air channels 24a, 24b are extending in a mutual angle of about 30 degrees, i.e. 15 degrees with respect to the vertical direction which leads to a better noise reduction and to a better distribution of the bracing effect of the air channels 24a, 24b along the toe guard 28.

(7) By the first upper horizontal portions 23a, 23b and by the tilting or inclination of the second lower portions 25a, 25b with respect to the vertical direction as well as by the sideward directed outlet openings 32 of the air channels 24a, 24b, the air channel forms an acoustic labyrinth and reduces noise created by the trash holes 20a,b and 22a,b essentially.

(8) It is clear, that the above-mentioned embodiment can be varied according to design necessities. For example, the door sill 12 comprises two grooves 12, 14. The door sill may also comprise only one groove or three or four grooves according to the number of door leaves to be guided. The shown door sill is a door sill for a centrally opening car door. If the door opens to one side, the trash holes are of course located at that side where the door closes.

(9) Instead of two trash holes per groove, also one or three trash holes may be provided. The geometry of the trash holes is shown as elliptic. The trash holes can of course have a rectangular or circular form as desired.

(10) The toe guard 28 consists of a vertical first upper part 29 and an inwardly bent lower part 30. Of course, the toe guard can be embodied as one single plate which is extending vertically or which is smoothly curved inwardly.

(11) The toe guard as well as the air channels need not to be manufactured from sheet metal but may also consist of other materials, e.g. plastics.