CN215160149U

CN215160149U - Landing door for elevator

Info

Publication number: CN215160149U
Application number: CN202120270264.4U
Authority: CN
Inventors: 主安成; 李卜辉; 彭领超
Original assignee: Wittur Holding GmbH
Current assignee: Wittur Holding GmbH
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-14
Anticipated expiration: 2031-01-29

Abstract

Landing door for an elevator, comprising a door leaf (2) comprising: a profile (3) shaped so as to define, in section, a concave trend; an end support portion (4) originating from the profile (3) and extending away from the profile; a guide means (5) associated with the end support portion (4) to guide the end support portion to slide along the sliding direction (S). At least one protrusion (9) originates from the end support portion (4), the at least one protrusion extending away from the end support portion along a direction parallel to the sliding direction (S). The utility model discloses in, the door leaf that outside stress, impact and thrust to the door probably lead to and the derailment of slip notch have been avoided to the jut to owing to got rid of middle hook, the sill structure can be simpler.

Description

Landing door for elevator

Technical Field

The utility model relates to a layer door for elevator.

Background

In the current state of the art, the doors for elevators consist of one or more door leaves provided with guide shoes (shoe) below, which slide in notches formed in the sill of the door to keep the door leaf inside the guide during the opening and closing movement of the car at the landing door. These guide shoes are provided at the door head (header), the known profile of which is specially shaped for the engagement between the door leaf and the sill (sil).

In one known solution, the door leaf comprises an anti-derailment device to avoid that stresses, impacts and thrusts on the door from the outside can cause the guide shoes to derail from their sliding recesses, freeing the door from lower constraints and dangerously allowing the door to provide free access to the elevator or elevator hoistway, even in the absence of a car. The derailing prevention device essentially comprises at least one hook-shaped element configured such that, in the presence of stresses on the door tending to cause its derailment, said element will hook to the curved edge defining the sliding notch, thus preventing any possible door leaf derailment.

The shape of the element results in a pile of stones or rubbish when the elevator is running. In addition, since at least one sill bending edge is required for the hook to normally work, the complexity of the sill structure increases.

Disadvantageously, the hook extends outwardly with respect to the door head, and therefore the sill structure must be larger than previous solutions.

SUMMERY OF THE UTILITY MODEL

Against this background, the underlying technical task of the present invention is to propose a landing door for an elevator, which overcomes the drawbacks of the prior art as described above.

In particular, it is an object of the invention to provide a landing door for an elevator, in which the accumulation of stones or rubbish is avoided.

Another object of the invention is to propose a landing door for an elevator, which has a simplified sill structure.

The technical task and the specific objects are basically achieved by a landing door for an elevator, comprising a door leaf comprising:

a profile shaped to define a concave trend in cross section;

a distal support portion originating from and extending away from the profile;

and a guide means associated with the tip supporting portion to guide the tip supporting portion to slide along the sliding direction.

At least one protrusion originates from the end support portion, the at least one protrusion extending away from the end support portion along a direction parallel to the sliding direction.

Preferably, the at least one protrusion is a baffle.

According to one embodiment, the at least one protrusion is two and originates from two opposite sides of the end support portion, respectively.

According to one embodiment, the guiding means comprise a slider arranged in a corresponding position formed in the terminal support portion.

According to one embodiment, the guiding apparatus comprises a guiding device comprising:

a body in which at least one first cavity is formed to open outward from the body;

a first spherical element rotatably inserted into the first cavity and arranged to face from the first cavity

Protruding outwards;

a friction reducing device interposed between the first spherical element and at least one wall defining the first cavity,

to restrict movement of the first spherical element within the first cavity.

Preferably, the landing door further comprises a sill including a groove in which the end supporting portion of the door leaf is slidably mounted. The guide means engage opposite sides of the groove.

According to one embodiment, the groove extends in a direction parallel to the sliding direction.

According to one embodiment, the groove comprises at least one groove in the sliding direction.

Preferably, the at least one groove is two and is realized on opposite sides of the groove.

According to one embodiment, the landing door includes a cover plate disposed on top of a portion of the trench.

Preferably, the cover plate is coupled at the groove at an end of the cover plate.

According to one embodiment, the terminal support portion extends from a central peripheral region of the profile. The protrusion defines a notch between the profile and the end support portion.

Drawings

Other features and advantages of the invention will become more apparent from the approximate, but not limiting, description of a preferred, but not exclusive, embodiment of the landing door of an elevator shown in the accompanying drawings, in which:

figure 1 shows a perspective view of a detail (door head) of a landing door according to the invention;

figure 2 shows the door head of figure 1 in perspective view with a first embodiment of the guide means;

figure 3 shows a perspective view of a first embodiment of the guide means;

FIG. 4 shows a side view of the guide of FIG. 3;

FIG. 5 shows a cross-sectional view A-A of the guide of FIG. 3;

figure 6 shows a longitudinal cross-sectional view of the guide of figure 3;

figures 7 and 8 show the door head of figure 1 in perspective view with a second embodiment of the guide means;

figure 9 shows a section of a detail (sill) of a landing door;

fig. 10 shows a perspective view of the sill of fig. 9;

figure 11 shows in perspective view a landing door according to the invention;

FIG. 12 shows a cross-sectional view of the landing door of FIG. 11 without the guide;

FIG. 13 shows a cross-sectional view of the landing door of FIG. 11 with a first embodiment of a guide;

figures 14 and 15 show cross-sectional views of the landing door of figure 11 with a second embodiment of the guiding means.

Detailed Description

With reference to the accompanying drawings, numeral 1 denotes a landing door for an elevator.

The landing door 1 comprises at least a door leaf 2. The door leaf 2 comprises a profile 3 shaped so as to define, in section, a concave trend and an end support portion 4, which originates from the profile 3 and extends away from the profile. In previously known solutions, the hook-shaped element of the derailment prevention system extends from the support.

The profile 3 and the end support portion 4 form part of a known component in the elevator field, which known component is called a "door head". The door head is the profile connecting the door leaf and the sill.

The landing door 1 comprises guide means 5 associated with the terminal support portion 4 to guide it in sliding along the sliding direction S. The guide means 5 are referred to as "guide shoes" in the elevator field.

According to a first embodiment, shown in fig. 2, the guiding means 5 comprise a guiding device 20.

The guide device 20 includes a body 21 in which a first cavity 21a is formed to open outward from the body 21. In other words, the first cavity 21a communicates with the outside through the opening 22. Preferably, the first cavity 21a has a substantially cylindrical shape.

The first spherical element 23a is rotatably inserted into the first cavity 21a and is arranged to protrude outward from the first cavity 21 a.

The portion of the first spherical element 23a protruding from the opening 22 is intended to roll on the surface of the groove 12 of the sill 11.

Preferably, the first spherical element 23a is arranged to contact the boundary 22a of the body 21 delimiting the opening 22.

In the embodiment described and illustrated herein, there are two

cavities

21a, 21b open to the exterior of the body 21. Each

cavity

21a, 21b has internally a corresponding

spherical element

23a, 23b, which is free to rotate on itself and partially protrudes outwards.

For the sake of clarity, numeral 21b designates a second cavity and numeral 23b designates a second spherical element.

Preferably, the two

cavities

21a, 21b are separate, i.e. not communicating.

Preferably, the two

cavities

21a, 21b are substantially identical in shape and size and are formed in the body 21 so that the first spherical element 23a and the second spherical element 23b project externally from the body 21 on opposite sides.

The guide device 20 comprises an anti-friction means 24 interposed between the first spherical element 23a and at least one wall delimiting the first cavity 21a to limit the movement of the first spherical element 23a inside the first cavity 21 a.

In particular, the friction reducing means 24 limit the translation of the first spherical element 23a within the first cavity 21a without hindering the rotation.

Preferably, the friction reducing means 24 comprise at least one abutment ball 24 arranged inside the first cavity 21 a. The size of the abutment ball 24 is smaller than the first spherical element 23 a.

Preferably, the abutting balls 24 accommodated inside the first cavity 21a are plural. Preferably, the abutment balls 24 are arranged circumferentially around the first spherical element 23 a.

In the preferred embodiment, there are four abutment balls 24.

In other words, the first spherical element 23a is interposed between the abutment balls 24.

Even in the second cavity 21b there are friction reducing means 24 similar to those described for the first cavity 21 a.

Preferably, the main body 21 has a notch 25 suitable for coupling to the corresponding position 7 of the terminal support portion 4.

According to a second embodiment, as shown in fig. 7 and 8, the guide means 5 comprise a slider 6 arranged in a corresponding position 7 formed in the terminal support portion 4. Figures 7 and 8 show two different sliders of known type, respectively.

Initially, at least one protrusion 9 originates from the end support portion 4, said protrusion extending away from the end support portion in a direction parallel to the sliding direction S.

Preferably, the protrusion 9 is substantially a flap.

The end support portion 4 extends from a central peripheral region of the profile 3. In other words, the protrusion 9 defines a recess 10 between the profile 3 and the end support portion 4.

Preferably, the protrusions 9 are two and originate respectively from two opposite sides of the terminal support portion 4. In particular, one projection 9 extends in a direction parallel to the sliding direction S, the other projection extending oppositely, i.e. in a direction parallel to but opposite to the sliding direction.

Preferably, the landing door 1 further comprises a sill (sil) 11 including a groove 12 in which the end support portion 4 of the door leaf 2 is slidably mounted. The guide means 5 engage opposite sides of the groove 12 to guide the end support portion 4 in its sliding movement.

Preferably, the cross-section of the groove 12 has a concave shape. In the embodiment described and illustrated herein, the trench 12 has a U-shape.

Preferably, the groove 12 extends mainly in a direction parallel to said sliding direction S.

Preferably, the groove 12 comprises at least one

recess

13, 14 in the sliding direction S.

Preferably, the

grooves

13, 14 are two and are realized on opposite sides of the groove 12.

Preferably, the landing door 1 comprises a cover plate 15 arranged on top of a portion of the trench 12. If the trench 12 has

grooves

13, 14, the cover plate 15 is coupled at its ends with the

grooves

13, 14.

The characteristics and advantages of the landing door for elevators according to the present invention appear clearly from the above description.

External stresses, impacts and thrusts on the door may cause the door leaf to derail from the sliding notch. This is avoided because the protrusions engage the walls of the groove and prevent derailment.

Furthermore, the projection extends in the sliding direction, so that the lateral load of the door head in the groove is not increased with respect to those solutions without derailment prevention systems.

Therefore, the sill structure may be simpler due to the removal of the middle hook. Due to the coupling with the small guide shoe, the height of the sill can be shortened and nearly 30% of the material is saved.

Further, the addition of the projection makes the end supporting portion stronger, and therefore it is also possible to reduce the distance between the two guide shoes and shorten the length of the sill.

Claims

1. Landing door for an elevator, comprising a door leaf (2) comprising:

a profile (3) shaped so as to define, in section, a concave trend;

a terminal support portion (4) originating from the profile (3) and extending away therefrom;

a guide means (5) associated with said terminal support portion (4) to guide the sliding thereof along a sliding direction (S),

characterized in that at least one protrusion (9) originates from the tip support portion (4), said at least one protrusion extending away from the tip support portion along a direction parallel to the sliding direction (S).

2. Landing door for an elevator according to claim 1, characterized in that the at least one projection (9) is a flap.

3. Landing door for an elevator according to claim 1 or 2, characterized in that the at least one projection (9) is two and originates from two opposite sides of the terminal support portion (4), respectively.

4. Landing door for elevators according to claim 1, characterized in that the guide means (5) comprise a slider (6) arranged in a corresponding position (7) formed in the terminal support portion.

5. Landing door for elevators according to claim 1, characterized in that the guiding device (5) comprises a guiding apparatus (20) comprising:

-a body (21) in which at least one first cavity (21a) is formed that opens outwards from said body (21);

-a first spherical element (23a) rotatably inserted in said first cavity (21a) and arranged to protrude outwards from said first cavity (21 a);

-friction reducing means (24) interposed between said first spherical element (23a) and at least one wall delimiting said first cavity (21a) to limit the movement of said first spherical element (23a) inside said first cavity (21 a).

6. Landing door for elevators according to claim 1, characterized in that it further comprises a sill (11) comprising a groove (12) in which the end support portion (4) of the door leaf (2) is slidingly mounted,

the guide means (5) engage opposite sides of the trench (12).

7. Landing door for an elevator according to claim 6, characterized in that the groove (12) extends in a direction parallel to the sliding direction (S).

8. Landing door for an elevator according to claim 7, characterized in that the trench (12) comprises at least one groove (13, 14) along the sliding direction (S).

9. Landing door for an elevator according to claim 8, characterized in that the at least one groove (13, 14) is two and is implemented on opposite sides of the trench (12).

10. Landing door for an elevator according to claim 9, characterized in that it comprises a cover plate (15) arranged on top of a part of the trench (12).

11. Landing door for an elevator according to claim 10, characterized in that the cover plate (15) is coupled at the groove (13, 14) at the end of the cover plate.

12. Landing door for elevators according to claim 1, characterized in that the terminal support portion (4) extends from a central peripheral area of the profile (3), the protrusion (9) defining a notch (10) between the profile (3) and the terminal support portion (4).