ELEVATOR DOOR WITH ONE DOOR LEAF GUIDE

Description

[0001] The invention relates to an elevator door with a door leaf and a door threshold, wherein the door leaf is guided on the door threshold.

[0002] Known elevator systems include elevator doors that are located at floors or within an elevator car. Such elevator doors have door leaves that are suspended and driven at their upper edge. The elevator doors also have door thresholds. The door threshold provides a step area in the door opening area. Furthermore, the door leaf is typically guided along this door threshold. For this purpose, a guide groove is provided in the door threshold, into which at least one guide element attached to the door leaf engages. During an opening or closing movement of the door leaf, the guide element slides within this guide groove provided for this purpose. This ensures at all times that the door leaf maintains its preferably vertical alignment, even if, for example, a person is leaning against the door leaf.

[0003] EP1646576 shows an elevator door comprising a door leaf and a door sill. Guide shoes are attached to the lower edge of the door leaf. The door sill has a guide groove. The guide shoes engage in the guide groove such that the door leaf is guided and supported by the guide groove.

[0004] WO2014005890 shows an elevator door comprising a door leaf and a door threshold. The door leaf has a lower edge arranged directly at the door threshold. A guide shoe is attached to the end of this lower edge facing the door opening. This guide shoe can be guided during an opening or closing movement of the door leaf by means of a guide groove formed in the door threshold. Furthermore, the door leaf has a guide rail on its lower edge, which can be guided by means of a tapered portion in the guide groove.

[0005] JPH08143256A shows an elevator door having a telescopic arrangement of two door leaves, but the document does not show a single door leaf having both a guide groove and a guide element.

[0006] The problem with this design is that the guide groove is located in the accessible tread surface of the door threshold. This leads to soiling of the guide groove by passengers using the elevator system. On the other hand, this tread surface is correspondingly uneven, which can lead to unwanted vibrations of the goods, for example, when rolling goods into the elevator car.

[0007] The object of the invention is therefore to provide an elevator door with an improved door leaf guide and such a door threshold for this purpose.

[0008] The object is achieved by an elevator door with a door threshold, which door threshold forms a tread facing the door opening of the elevator door, and a door leaf, which door leaf is displaceable between its open position and its closed position along a longitudinal direction of the door threshold, wherein the door leaf in its closed position forms a surface facing the tread at its door leaf end facing the door threshold, wherein a door leaf guide groove is formed in this surface parallel to the longitudinal direction of the door threshold and the door threshold comprises a guide piece arranged laterally of the tread with respect to the door opening, which guide piece engages in the door leaf guide groove to guide the door leaf,and wherein a guide element is arranged in the region of the door leaf end facing the door threshold and of the door leaf arranged in the open position facing the door opening, and a threshold guide ruler is arranged below the tread of the door threshold and is aligned parallel to the longitudinal direction of the door threshold, wherein the guide element can be guided by the threshold guide ruler while engaging under the door threshold when the door leaf is displaced.

[0009] The problem is also solved by means of an elevator system with such an elevator door.

[0010] The object is also achieved by means of a guide device for guiding a door leaf of an elevator door with a door sill, wherein the door leaf is provided for displacement between its open position and its closed position along a longitudinal orientation of the door sill, wherein the door sill forms a tread surface facing a door opening of the elevator door, which tread surface is provided for arrangement below a door opening formed by the elevator door in its open position, and the door sill comprises a guide piece, which guide piece is provided for engagement in a door leaf guide groove of the door leaf for guiding the door leaf and its arrangement with respect to the door opening to the side of the tread surface, and a sill guide ruler aligned parallel to the longitudinal orientation of the door sill is arranged below the tread surface of the door sill,wherein a guide element which can be arranged on the door leaf can be guided by the threshold guide ruler when the door leaf is moved.

[0011] For such an elevator door, there are requirements that a force acting perpendicularly on a plane of the door leaf does not significantly change the position of the door leaf. Consequently, the door leaf must be guided both at its upper door leaf end and at its lower door leaf end facing the door threshold. When the door leaf or elevator door is closed, the door leaf is exposed across essentially its entire surface to potential external influences from a person leaning against the door leaf. Such external influences can be caused, for example, by a person leaning against the closed elevator door or closed door leaf. Accordingly, when the elevator door is closed, the door leaf must be supported at both ends of the door leaf end facing the door threshold. Typically, the door leaf is also adequately supported at its upper door leaf end.In this way, the door leaf can be prevented from swinging out according to requirements at any time due to external influences caused by this person.

[0012] The invention is based on the finding that such external influences on the door leaf by a person on the floor or in the elevator car can only occur in the area of the door leaf visible from the floor or from the elevator car. Accordingly, the door leaf closure facing the door threshold must be mounted, on the one hand, in the area at the first end of the door leaf closure facing the door opening and, on the other hand, to the side of the tread. Consequently, when the elevator door is opened or closed and the door leaf is thereby displaced, the part of the door leaf freely accessible from the elevator car or from the floor can only be exposed to external influences by elevator passengers in the area of the door opening.

[0013] A shortened door threshold is achieved by means of the guide piece designed to engage in the door leaf guide groove. This means that the guide piece guides the door leaf directly adjacent to the vertical alignment of the vertical door opening width.

[0014] This allows the door threshold to be positioned, or can be positioned, essentially exclusively below the door opening. At the same time, this guide piece allows the door leaf guide groove, which can be integrated into the door leaf, to be concealed or hidden from the elevator passenger.

[0015] Furthermore, such a guide piece, designed to guide the door leaf in the guide groove of the door leaf, offers the advantage that the opening of the door leaf guide groove is oriented downwards within the elevator system. This largely eliminates the risk of contamination of the door leaf guide groove and thus the risk of malfunctioning the elevator door due to increased friction during operation when the door leaf opens or closes.

[0016] By definition, the door opening is a plane parallel to the door leaf, which plane is located within, at least partially within, the volume of the door leaf in its closed position.

[0017] In a further development of the door threshold, the guide element has a maximum dimension of 130 mm, aligned parallel to the longitudinal axis of the door threshold. This is advantageous because a section of the door threshold located to the side of the door opening, in the longitudinal axis of the door threshold, can be short. This saves material and space.

[0018] In a further development of the door threshold, the threshold guide rail and the door threshold are formed integrally. This allows for simplified installation of the door threshold or elevator door.

[0019] In a further development of the door threshold, the threshold guide rail is formed or can be formed along the entire width, preferably at least along the entire width of the door opening. This enables guidance of the door leaf or the guide element arranged on the door leaf between the closed and open positions of the door leaf.

[0020] In a further development of the door threshold, the door leaf guide groove is formed or can be formed essentially along the entire width of the door leaf. It is therefore advantageous that the guide element is suitable for guiding the door leaf between its open and closed positions.

[0021] In a further development of the door threshold, the guide piece is positioned or can be positioned a maximum of 0.2 m to the side of the tread with respect to the door opening. This means that the guide piece has a maximum distance of 0.2 m along the longitudinal direction of the door threshold in line with the tread. Preferably, the guide piece is directly adjacent to the tread. This allows the door threshold to require only a small amount of space.

[0022] A further development of the elevator system comprises a car door or a shaft door, wherein the car door or the shaft door is formed by such an elevator door.

[0023] Typically, an elevator car, including the car door, is arranged vertically movable within the elevator shaft. Accordingly, the horizontal cross-section of the elevator car must be kept free of any components of the elevator system or objects over the entire height of the elevator shaft to enable the elevator car to be moved. While the elevator car is moving within the elevator shaft, the car door is closed, with the door sill, which is horizontally aligned below the door opening, essentially extending only below at least one door leaf in its closed position. By designing such an elevator door as a car door, the area of the horizontal cross-section of the elevator car, and thus the volume of the elevator shaft, can be minimized or used more efficiently.

[0024] The volume of the elevator shaft can also be minimized or used more efficiently if the elevator door is designed as a shaft door, so that the door threshold is arranged or can be arranged substantially completely below the at least one door leaf of the shaft door in its closed position.

[0025] The invention is explained in more detail below with reference to the figures. They show: Fig. 1: an elevator system with elevator doors; Fig. 2: an elevator door according to the prior art; Fig. 3: a lower area of an elevator door according to a first embodiment; Fig. 4: the lower area of the elevator door Fig. 3 ; Fig. 5 shows a detail of an elevator door in cross section according to a second embodiment; and Fig. 6 shows a detail of an elevator door in cross section according to a third embodiment.

[0026] Figure 1shows an elevator system 2. The elevator system 2 comprises an elevator shaft 4 and an elevator car 6 that can usually be moved vertically along the elevator shaft 4, and a counterweight 8 that can be moved in the opposite direction to the elevator car 6. The elevator car 6 and the counterweight 8 are connected by means of a support element 10. The support element 10 can be guided over at least one deflection pulley 12, 14, wherein one of these deflection pulleys 12, 14 can be designed as a drive pulley 12 of the elevator system 2 that is connected to a drive unit.

[0027] The elevator shaft 4 has several shaft door openings, which are usually arranged vertically one above the other according to the mobility of the elevator car 6. These shaft door openings allow access to the interior of the elevator shaft 4 or the elevator car 6 from floors 19a-d. A shaft door 18 associated with the floor 19a-d is arranged at each of these shaft door openings. The elevator car 6 comprises a car door 16. By moving the elevator car 6 in the elevator shaft 4, the car door 16 can be arranged at one of the shaft doors 18.

[0028] Figure 2shows an elevator door 16, 18 comprising a device for guiding a door leaf 22 according to the prior art. The elevator door 16, 18 has the door leaf 22 and a door sill 26. Typically, the elevator door 16, 18 can comprise additional door leaves 22. When the elevator door 16, 18 is closed, the door leaf 22 covers at least part of a door opening 3. The door opening 3 can be delimited on both sides by a door post 31.1, 31.2. At its lower end, the door opening 3 is delimited by the horizontally extending door sill 26. The door leaf 22 is guided in the door sill 26 in the region of a door leaf end facing the door sill 26.

[0029] For the purpose of guiding the door leaf 22, the door sill 26 has a door leaf guide groove 28. A first guide shoe 35' and a second guide shoe 35" are fastened to the door leaf end facing the door sill 26. The guide shoes 35', 35" fastened to the door leaf 22 engage in the guide groove 28 of the door sill 26. In order to be able to guide both guide shoes 35', 35" in the guide groove 28 at all times until the elevator door 16, 18 is fully opened, the door sill 26 includes a door sill extension 26'. In contrast to the door sill 26 arranged below the door opening 3, the door sill extension 26' does not serve as a step for persons entering or exiting the elevator car 6 through the open elevator door 16, 18.

[0030] Figure 3shows a first embodiment of an elevator door 16, 18 comprising a door leaf 2 and a door threshold 26, wherein the door leaf 22 is shown in an exploded view at a distance from the door threshold 26. A door post 31.1, 31.2 can be arranged on either side of the door opening 3. The usually horizontally aligned door threshold 26 is arranged below the door opening 3.

[0031] The door threshold 26 has a substantially flat surface 40 facing the door opening 3, which serves as a step surface 40 for persons passing through the elevator door 16, 18. Flat surface in this context means that the step surface 40 does not have any Figure 2 shown guide groove 28. Nevertheless, the tread surface 40 can have grooves, notches or similar depressions or elevations, for example to prevent a person stepping onto the tread surface 40 from slipping.

[0032] A guide element 46 is arranged on the door leaf end facing the door threshold 26, i.e., the lower end. Furthermore, the guide element 46 is arranged on the front edge of the door leaf 22, i.e., in the open position of the door leaf 22, on the side of the door leaf 22 facing the door opening 3. This means that the guide element 46 is arranged in the region of the first end of the door leaf end facing the door opening 3 when the door leaf 22 is in the open position. A threshold guide rail 44 is arranged below the tread surface 40 for guiding, in particular for receiving, the guide element 46.

[0033] The door threshold 26 includes a guide piece 48. The guide piece 48 is arranged laterally of the tread surface 40 with respect to the door opening 3. This means that the guide piece 48 is directly adjacent to the tread surface 40 in the longitudinal direction of the door threshold 26, in alignment with the tread surface 40, or is spaced slightly apart from the tread surface 40. This distance is preferably a maximum of 0.2 m.

[0034] The guide piece 48 is designed to engage in a Figure 3 A door leaf guide groove (not shown) is provided. This door leaf guide groove is formed in the surface of the door leaf 22 facing the door threshold 26 and runs essentially along the entire length of the door leaf 22.

[0035] For example, the guide piece 48 can have a brush element in the area of its engagement in the door leaf guide groove, which can remove dirt or similar deposits from the door leaf guide groove.

[0036] Figure 4 shows a section AA of Figure 3 The elevator door 16, 18 shown in the region of the door threshold 26 comprises the lower door leaf end of the door leaf 22 and the door threshold 26. Visible is the surface 42 of the door leaf 22 facing the door threshold 26. Formed in this surface 42 is the door leaf guide groove 28 running parallel to the longitudinal alignment of the door threshold 26. The guide piece 48 of the door threshold 26, arranged in the immediate vicinity of the tread surface 40, engages in the door leaf guide groove 28.

[0037] The guide element 46 engages under the door sill 26 and can be guided along the door sill 26 by the sill guide rail 44. The door sill 26 and the sill guide rail 44 are, for example, integrally formed. The guide element 46 comprises, for example, a guide shoe 45 for supporting the guide element 46 on the sill guide rail 44. In the Figure 4In the embodiment shown, the guide element 46 engages behind the threshold guide ruler 44, so that when a force acts perpendicularly on the plane of the door leaf 22 through the threshold guide ruler 44, a deflection of the door leaf 22 is prevented by an interaction of the guide element 46 with the threshold guide ruler.

[0038] The Figures 5 and 6 show alternative design variants of the Figure 4 shown details B of the elevator door 16, 18. The Figures 5 and 6 partially show a door threshold 46 and at least one threshold guide rail 44, 44' of a guide device for guiding a door leaf of an elevator door. The guide devices comprise a threshold guide rail 44' positioned by means of a holding element 26' or positionable on the elevator door, which is spaced from the door threshold 26.

[0039] The guide element 46 engages beneath the door sill 26 and engages the sill guide rail 44' by means of a first hook end 46'. The sill guide rail 44' thus exclusively prevents deflection of the door leaf 22 in the event of a force acting perpendicular to the plane of the door leaf 22 in the direction R1. Deflection in the opposite direction R2 is prevented by the door sill 26.

[0040] The Figure 6The guide device shown additionally comprises a threshold guide bar 44 formed integrally with the door threshold 26. The guide element 46 comprises a second hook end 46' for engaging behind the additional threshold guide bar 44. The additional threshold guide bar 44 acts in the same way as the threshold guide bar 44' not formed integrally with the door threshold 26. A second such threshold guide bar 44 has the purpose of absorbing larger forces acting on the door leaf 22 in the direction R1.

Claims

1. lift door (16, 18) with a door sill (26), which door sill (26) forms a step surface (40) facing the door opening (3) of the lift door (16, 18), and a door leaf (22), which door leaf (22) is displaceable between its open position and its closed position along a longitudinal alignment of the door sill (26), wherein the door leaf (22) in its closed position forms a surface (42) facing the tread surface (40) at its door leaf end facing the door sill (26), wherein a door leaf guide groove (28) extending parallel to the longitudinal alignment of the door sill (26) is formed in this surface (42) and the door sill (26) comprises a guide piece (48) arranged laterally of the step surface (40) with respect to the door opening (3), which guide piece (48) engages in the door leaf guide groove (28) for guiding the door leaf (22), and characterised in that a guide element (46) is arranged in the region of the door leaf end facing the door sill (26) and the first end of the door leaf end facing the door opening (3) when the door leaf (22) is arranged in the open position, and a threshold guide ruler (44, 44') aligned parallel to the longitudinal alignment of the door threshold (26) is arranged below the tread surface (40) of the door threshold (26), wherein the guide element (46) can be guided underneath the door threshold (26) by the threshold guide ruler (44, 44') when the door leaf (22) is displaced.

2. lift door (16, 18) according to claim 1, wherein the guide element (46) has a maximum dimension of 130 mm aligned parallel to the longitudinal alignment.

3. lift door (16, 18) according to one of the preceding claims, wherein the threshold guide ruler (44, 44') and the door threshold (26) are integrally formed.

4. lift door (16, 18) according to one of the preceding claims, wherein the threshold guide ruler (44, 44') is formed along the entire width of the door opening (3).

5. lift door (16, 18) according to one of the preceding claims, wherein the door leaf guide groove (28) is formed substantially along the entire width of the door leaf (22).

6. lift door (16, 18) according to one of the preceding claims, wherein the guide piece (48) is arranged at most 0.2 m laterally of the tread surface (40) with respect to the door opening (3).

7. lift installation (2) comprising a car door (16) or a shaft door (18), wherein the car door (16) or the shaft door (18) is formed by the lift door (16, 18) according to one of the preceding claims.