EP2042463B1 - Telescopic apron for an elevator car and elevator car equipped with such a telescopic apron - Google Patents

Abstract

The multipart telescope apron has four plate shaped telescope elements (3,4,5,6), which are fastened mutually to telescope rail (7) and are transferred back from a drive in state into a driving out state. An outside rail section (7.1) of the telescope rail is inserted in the driving out state of cabin apron over the telescope element in a U-shaped stiffener profile (8).

Description

The invention relates to a multi-part telescopic apron for an elevator car, which has at least four plate-shaped telescopic elements, which are fastened on both sides to telescopic rails and from a retracted state to an extended state and back are feasible, each telescopic rail an outer U-shaped rail section whose leg ends after are angled inside, and having at least one further ball-bearing rail portion, said rail portions having spaced holes for fastening elements, with which the telescopic rails are attached to the plate-shaped telescopic elements.

Car aprons of elevator car baskets are designed to prevent persons from falling into the elevator shaft in the event of an elevator car parked between two floors and to be damaged if the elevator door is opened to release persons. It is therefore mandatory to attach a car apron to the underside of the car, for which a skirt minimum height of 750 mm is required in accordance with DIN EN 81-1, 8.4: 1998.

There are different versions of car aprons. Often rigidly connected to the car car skirts are used, which bring with it the disadvantage that the elevator must have a correspondingly deep shaft pit when the car is in the lowest station.

When designing and assembling lift cage car skirts, it is generally considered that the available space is very limited, so that the dimensions of the car apron, including the mounting elements, must be as small as possible.

At one in the FR 2 841 886 A1 described three-part telescopic apron for an elevator car a telescopic rail system is provided, consisting of plastic guide rails with lateral guide grooves, in which engage the inwardly angled leg ends of U-shaped metal guide rail sections. Such, designed according to the tongue and groove principle telescopic rail systems must be made with a very high dimensional accuracy and are therefore relatively expensive to manufacture. Despite these high demands on the dimensional accuracy and in spite of the choice of material, in order to avoid blocking, between the inwardly angled U-profile legs and the side guide grooves sufficient clearance must be present, which over the length of the extended car apron the risk of uncontrolled lateral movements in harbors that can affect the proper extension of the car apron in extreme cases.

With the use of inexpensive, commercially available, ball-bearing telescopic rails occur in telescopic car aprons with three or four plate-shaped telescopic elements or apron plates difficulties in the strength and stability of the extended car apron, especially in the region of the lower ends of the upper outer U-shaped rail sections ,

To remedy these difficulties, the treated in claim 1 construction.

Another problem is that commercially available telescopic rails generally have standard mounting holes and the rails have fixed lengths with standard extension lengths getting produced. The standard holes usually have a diameter between 4.2mm - 4.5mm for preferred telescopic rail designs.

Since in a four-part telescopic apron with four plate-shaped telescopic elements or apron plates three pairs of telescopic rails are mounted with four mounting holes on the apron plates, the tolerances add in such a way that at a horizontally acting on the bottom apron plate force at an assumed diameter of the mounting holes of , 5mm and the usual use of 4mm OD fasteners with a total skirt length of 750mm can result in a deflection of approximately 20mm, increasing the gap between the car and the elevator shaft by that amount. Since further tolerances are added with ball-bearing telescopic rails, solutions are required which reduce a deflection or deflection of the lowermost plate.

To remedy this problem, the measures according to claim 3 serve.

Since commercially available telescopic rails usually have a predetermined total extension length, arises when using these telescopic rails in the range of car aprons for elevator cars usually the problem that the total extension length of a telescopic car apron does not match the possible total extension length, for example three combined telescopic rail pairs.

This problem is solved by the measures according to claim 6.

By the use of stiffening profiles according to the invention, the distance between adjacent side walls of the individual plate-shaped telescopic elements is also increased at the same time, so that sufficient space is available for extending and retracting the car apron for the interacting stops and counterstops.

• Figur 1 zeigt in vereinfachter Darstellung einen Aufzugskorb mit einer an der Fahrkorbschwelle befestigten Fahrkorbschürze im ausgefahrenen Zustand;
• Figur 2 zeigt die Fahrkorbschürze im eingefahrenen Zustand;
• Figur 3 zeigt losgelöst von dem Aufzugfahrkorb eine Draufsicht auf die Fahrkorbschürze;
• Figur 3a zeigt in vergrößerter Darstellung eine Draufsicht des Teleskopschienensystems;
• Figur 4 zeigt in der Draufsicht und in der Vorderansicht eine handelsübliche Teleskopschiene mit drei Teleskopschienenabschnitten;
• Figur 5 zeigt in der Draufsicht und Seitenansicht die in ein Versteifungsprofil eingesetzte Teleskopschiene gemäß Figur 4;
• Figur 6 zeigt in vergrößerter schematisierter Darstellung eine Detailansicht der Farbkorbschürze im eingefahrenen Zustand;
• Figur 7 zeigt in der Draufsicht und in der Vorderansicht das erfindungsgemäß verwendete Versteifungsprofils.

The invention will be described in more detail below with reference to the drawing.

• FIG. 1 shows in a simplified representation of an elevator car with an attached to the car threshold car apron in the extended state;
• FIG. 2 shows the car apron in the retracted state;
• FIG. 3 shows detached from the elevator car a plan view of the car apron;
• FIG. 3a shows an enlarged view of a top view of the telescopic rail system;
• FIG. 4 shows in plan view and in front view of a commercially available telescopic rail with three telescopic rail sections;
• FIG. 5 shows in plan view and side view of the telescopic rail used in a stiffening profile according to FIG. 4 ;
• FIG. 6 shows an enlarged schematic representation of a detailed view of the Farbkorbschürze in the retracted state;
• FIG. 7 shows in plan view and in front view of the stiffening profile used in the invention.

FIG. 1 schematically shows a car 2 with attached car apron 1, consisting of four telescopically displaceable against each other, plate-shaped telescopic elements (apron plates) 3, 4, 5 and 6, of which the uppermost and outer telescopic element 3 in the region of the threshold 2.1 of the car 2 attached is, whose substructure 2.2 is indicated schematically.

The individual plate-shaped telescopic elements 3, 4, 5 and 6 are connected to each other by means of pairs of telescopic rails 7, according to FIG. 3 are arranged on both sides of the plate-shaped telescopic elements. The detailed view according to FIG. 3a shows in an enlarged view three ball-bearing telescopic rails 7, which are inserted into U-shaped stiffening profiles 8.

The individual plate-shaped telescopic elements 3, 4, 5 and 6 are provided on both sides with perpendicularly oriented side wall sections 3.1, 4.1, 5.1 and 6.1, where the ball-bearing telescopic rails 7, including the stiffening profiles 8 are attached.

FIG. 4 shows the structure of a commercially available telescopic rail 7 used in the invention, consisting of an outer, substantially C-shaped rail section 7.1, a middle, also substantially C-shaped rail section 7.2 and an inner, U-shaped rail section 7.3. These rail sections are coordinated in a conventional and not belonging to the invention way to each other and connected to each other, that they from a retracted or nested state in the from the lower part of FIG. 4 shown manner can be pulled apart.

FIG. 5 shows the inserted or fitted in a stiffening profile 8 telescopic rail. 7

This in FIG. 7 stiffening profile 8 again shown, which preferably consists of aluminum and has a wall thickness in the range of 2 - 5 mm, is provided with two holes 8.1 with a diameter of the fasteners used, in particular screws, adapted diameter of about 4mm.

FIG. 3a shows the manner of attachment of the individual telescopic rails 7 including the stiffening profiles 8 on the side walls 3.1, 4.1, 5.1 and 6.1 of the plate-shaped telescopic elements 3, 4, 5 and 6, wherein the dashed lines "a", "b", " c "and" d "in the manner described below, as the individual elements are connected together or attached to each other.

According to line "a" the outer telescopic rail 7 is fixed with its outer rail section 7.1 including the stiffening profile 8 on the side wall 3.1 of the plate-shaped telescopic element 3;
According to line "b" are attached to the side wall 4.1 of the plate-shaped telescopic element 4 of the inner rail section 7.3 of the outer telescopic rail 7 and the outer rail section of the central telescopic rail including the stiffening profile 8;
According to line "c" on the side wall 5.1 of the plate-shaped telescopic element 5 on the one hand the inner rail section of the central telescopic rail and on the other hand the outer rail section of the inner telescopic rail 7 including the stiffening profile 8 are attached:
According to line "d", the inner rail section of the inner telescopic rail 7 is fastened to the side wall 6.1 of the plate-shaped telescopic element 6.
According to the FIGS. 4 and 5 have the inner and outer rail sections 7.1 and 7.3 spaced apart holes 7.11 and 7.31, to indicate that the attachment of the telescopic rails 7, including the stiffening profiles 8 takes place respectively at two superimposed points of the side walls 3.1, 4.1, 5.1 and 6.1. These holes 7.11 and 7.31 have commercially available telescopic rails 7 usually has a diameter in the range of 4.2mm to 4.5mm.
According to FIG. 6 are in the region of the upper ends of the side walls 4.1, 5.1, and 6.1 each outwardly projecting and aligned in the rest position of the car apron Fixed stops 4.11, 5.11 or 6.11. At the lower ends of the side walls 3.1, 4.1 and 5.1 are in the rest position of the car apron also aligned, inwardly directed counterstops 3.12, 4.12 and 5.12 arranged such that the stops 4.11; 5.11 or 6.11 in the manner indicated by the arrows against these counterstops 3.12, 4.12 or 5.12 come to rest and thus limit the downward movement of the individual plate-shaped telescopic elements 4, 5 and 6.

Claims (8)

1. A multiple-part telescopic toe guard for a lift cage (2), which includes at least four panel-shaped telescopic elements (3, 4, 5, 6) which are secured on both sides to telescopic rails (7) and may be moved from a retracted condition to an extended condition and back, with each telescopic rail (7) including an external U-shaped rail portion (7.1) whereof the limb ends are angled inward, and at least one further rail portion (7.2; 7.3) of ball bearing type, with the rail portions including mutually spaced bores (7.11; 7.31) for securing elements by means of which the telescopic rails (7) are secured to the panel-shaped telescopic elements, characterised in that at least the outer rail portion (7.1) of that telescopic rail (7) of the telescopic element (3) which is at the top in the extended condition of the cage toe guard (1) is inserted into a U-shaped stiffening profile (8).
2. A telescopic toe guard according to Claim 1, characterised in that the outer rail portions (7.1) of at least two telescopic rails (7) are inserted into U-shaped stiffening profiles (8).
3. A telescopic toe guard according to Claim 1 or 2, characterised in that the U-shaped stiffening profiles (8) include bores (8.1) which are flush with the bores in the telescopic rails and whereof the internal diameters are matched to the precise diameter of the securing elements.
4. A telescopic toe guard according to one of Claims 1 to 3, characterised in that the individual telescopic elements (toe guard panels) (3, 4, 5, 6) include at their ends side walls (3.1; 4.1; 5.1; 6.1) which are aligned at a right angle to the plane of the telescopic elements and to which the base webs of the U-shaped stiffening profiles (8) are secured.
5. A telescopic toe guard according to Claim 4, characterised in that, with the exception of the side walls (3.1) of that panel-shaped telescopic element (3) which is at the top in the extended condition of the telescopic cage toe guard (1), there are secured in the region of the upper ends of the other side walls (4.1, 5.1 and 6.1) outwardly directed abutment pieces (4.11 and 5.11 and 6.11 respectively), and in that, with the exception of the side walls (6.1) of that panel-shaped telescopic element (6) which is at the bottom in the extended condition of the telescopic toe guard, there are secured to the lower ends of the further end walls (3.1; 4.1; 5.1) counter-abutment pieces (3.12 and 4.12 and 5.12 respectively).
6. A telescopic toe guard according to Claim 5, characterised in that the counter-abutment pieces (4.11, 5.11 and 6.11) are arranged to be flush with one another in the retracted condition of the telescopic cage toe guard (1).
7. A telescopic toe guard according to Claim 5 and/or 6, characterised in that the abutment pieces (3.12, 4.12 and 5.12) are arranged to be flush with one another in the retracted condition of the telescopic cage toe guard (1).
8. A lift cage which is equipped with a telescopic toe guard according to one of Claims 1 to 7.

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