EP2690050A1 - Lift cabin with maintenance window - Google Patents

Abstract

The lift cabin (1) has a spacer (8) which is brought into a maintenance position to provide barrier at a safe distance from passing lift components (18), when a panel (5) is opened. A safety device monitors whether the panel is in the normal position and the spacer is located in the maintenance position. The safety device blocks normal travel as well as inspection travel of the lift cabin, when the panel is not located in the normal position and the spacer is not located in the maintenance position, and enables the inspection travel if the spacer is located in the standby position.

Description

The invention relates to a lift cabin with side maintenance window according to the preamble of claim 1.

Lifts must be regularly inspected and maintained to ensure adequate safety. In particular, elevator components such as guides of counterweights, guides of the elevator car, trolleys, suspension cables, etc. must also be checked, which often run at least partially in the elevator shaft to the side of the elevator car. In particular, a lift drive can be arranged laterally next to the elevator car in the elevator shaft.

For this purpose, it is known to provide a maintenance window in a side wall of the elevator car. A lift fitter can use the maintenance window to check from the inside of the cabin the components present on the corresponding side in the lift shaft and, if necessary, to service them. A corresponding maintenance window is for example from the WO 01/79104 A1 known. In this case, the lift fitter first drives the elevator car to a desired location and then opens the maintenance window to perform the required maintenance.

Often, however, it is advantageous if it is possible to drive with the maintenance window open in order to be able to position the elevator cabin as desired. Such revision drives are typically performed at a reduced speed compared to normal travel. However, such a revision trip involves comparatively great risks for the lift fitter. Elevator components (relative to the elevator car) often pass in close proximity to the maintenance window, so that z. B. clothes of the lift fitter can catch. It is therefore necessary to ensure appropriate safety distances of the lift fitter to the elevator components. In addition, it must be ensured that normal driving is not possible when the maintenance window is open. For this purpose, relevant regulations must be observed.

WO 2008/074167 A1 describes a lift cabin with maintenance window, in which a barrier is to ensure that the required safety distances are maintained. The maintenance window is closed by a removable panel. The panel is parked by the lift fitter after removal on the cabin floor and leaned as a safety barrier to the cabin wall, in which the maintenance window is formed. In this case, a spacer such as a handrail is provided which determines a distance of the panel from the cabin wall. After switching off a cable of a safety device is connected to the panel, whereby a revision drive is released. When the panel is removed and the safety device is not connected, no cab travel is possible.

Although these devices ensure that the cabin is not mobile, as long as the maintenance window is open and there is no safety barrier. However, the arrangement of the barrier and the connection of the safety device for the lift fitter are complex and therefore less comfortable to handle. In addition, the security device does not ensure that the barrier is properly located and forms a safety barrier. For example, the barrier could fall over during the journey, if they z. B. is not properly hung on the handrail. Since only one position on the panel can be checked via the connection of the cable, the panel can, for. B. may be ajar, so that is fallen below on one side of the safety distance. The lift mechanic is thus exposed to unnecessary risks, since under certain circumstances, a revision drive is feasible with connected to the security device, but not correctly arranged barrier.

It is therefore the object of the invention to overcome the disadvantages of the prior art. In particular, it is an object of the invention to provide a lift cabin with a side maintenance window, which ensures optimum safety with simple handling.

This object is solved by the features of claim 1. This relates to a lift cabin with a side maintenance window and a panel which covers an opening of the maintenance window openable in a normal position. A spacer, in particular when the maintenance window is open, can be brought into a maintenance position in the maintenance window in such a way that a barrier is provided at a safe distance from passing elevator components. A safety device monitors whether the panel is in the normal position and whether the spacer is in the maintenance position. The invention is characterized in that the safety device blocks a normal drive and a revision drive the elevator car when the panel is not in the normal position and the spacer is not in the maintenance position. A revision drive can only be released by the safety device if the spacer is in the maintenance position.

Preferably, the revision drive is automatically released when the spacer is in the maintenance position. In this case, no further manipulations such as. B. the transfer of a released only in the maintenance position lock switch by the lift mechanic required.

The inventive solution has the advantage that a revision ride is only released when the spacer is actually in a maintenance position in which there is a barrier with safety distance. When introducing into the maintenance position, the spacer z. B. automatically locked. Likewise, the spacer can be locked manually, z. B. by tightening a screw or inserting a cotter pin. But even without detection sufficient security is ensured according to the invention, since the revision drive would be interrupted immediately if the spacer deviates from a maintenance position. It is understood that in principle also several maintenance positions or a range of maintenance positions can be provided, in which a barrier is ensured with a sufficient safety distance.

The spacer may, for. B. be formed as a separate plate element or bracket element, which in the maintenance position z. B. is inserted from the inside of the cab in corresponding brackets of the elevator car. For this purpose, the spacer z. B. stowed in the elevator car. Likewise, the spacer may be attached to the elevator car and in the maintenance position z. B. be pivoted in the cabin interior. It is understood that the safety distance and a height above the cabin floor of the barrier provided by the spacer can be largely freely selected according to the requirements or the regulations.

Preferably, the safety device comprises a first safety contact, which can be activated by bringing the panel into the normal position. The safety contact can for example be designed as a switch or as a button, but also be activated magnetically or in another way. Preferably, the safety contact is as simple and robust as possible. Advantageously, the first safety contact can be activated directly by the panel, if this comes to the normal position or is arranged in this. Basically, a simple electrical contact button is conceivable, which is closed when inserting the panel in the maintenance window.

Advantageously, a locking device is also present, via which the panel can be locked in the normal position, such. B. a closing device with a lock. In this case, the first safety contact can also be activated only via the locking device when the panel is locked in the normal position or is. To open the maintenance window, the panel may be designed, for example, as a one-part or multi-part pivoting wing. Preferably, however, the panel is designed to be removable for opening, so that an opening of the opened maintenance window is completely released.

Advantageously, the safety device comprises a second safety contact, which can be activated by the spacer is brought into the maintenance position. The second safety contact can be designed largely analogously to the first safety contact. The second safety contact is preferably activated directly by the spacer when it enters the maintenance position or is arranged in this.

It is understood that instead of a safety contact, other monitoring devices may be provided for both the panel and the spacer. For example, it could also be determined via optical or acoustic sensors whether the panel is in the normal position or the spacer is in the maintenance position.

Advantageously, the spacer is designed such that it is arranged in the maintenance position largely perpendicular to the cabin wall, on which the maintenance window is formed. Thus, a size of the spacer can be used to the maximum. In variants, depending on the design of the spacer, this can also be arranged at any angle. It is conceivable z. B. arranged below the maintenance window, with an upper edge in the cabin space einschwenkbares further panel.

To be particularly advantageous, an arrangement of the spacer has been found, in which the spacer protrudes in the maintenance position through the maintenance window in the cabin interior. In this way, fastening or holding means can be arranged outside the cabin interior, where they are accessible from the cabin interior only after the opening of the maintenance window.

Advantageously, the spacer is movably supported on the elevator car. He is in particular from the maintenance position in a rest position can be brought (and vice versa). For example, the spacer may be designed extendable, z. B. in the rest position, d. H. in normal operation of the lift, serve as a handrail, which can be pulled in the case of maintenance in longitudinal guides in the cabin interior in the maintenance position. Likewise, it is basically conceivable that the spacer is designed as part of the cabin wall which can be pivoted into the cabin interior, z. B. as another panel. However, the spacer can also be supported so movable that it is fixed in the rest position and the maintenance position each rigidly to the elevator car and is only movable to the transition from one to the other position.

Preferably, the spacer between the rest position and the maintenance position is pivotally mounted on the elevator car. In particular, the spacer is pivotable about a direction substantially parallel to the cabin floor and the cabin wall direction. In this way, the spacer can be arranged in the rest position, for example, particularly space-saving parallel to the cabin wall, while it is pivoted in the maintenance position in the cabin interior. The spacer in the rest position is advantageously arranged such that it can be covered by the panel when it is brought into the normal position. In variants, the spacer may also be designed as a fold-out element of an inner wall lining of the cabin wall, for example as a fold-out bracket.

Advantageously, the spacer extends at least over the entire width of the clear opening of the maintenance window. Width refers to a dimension in the direction parallel to the cabin wall and the cabin floor. In this way, it is ensured that it is not possible to fall below the safety clearance provided by the spacer from the position of the cabin interior to the maintenance window.

As already mentioned, the spacer can be designed in different ways. Particularly preferably, however, the spacer comprises a bracket, which is in particular U-shaped. In this way can be structurally simple to provide a lightweight spacer. The bracket can be supported at its free arms in pivot bearings on the elevator car. Preferably, however, the bracket is mounted in a rest position in corresponding supports and arranged with the bracket plane largely parallel to the cabin wall. The bracket can be attached via bolts in a maintenance position to a support structure of the elevator car, in which it protrudes largely perpendicular to the cabin wall in the cabin interior. For easy attachment z. B. wing nuts are used, with free ends of the bracket can be angled to provide a good mounting surface.

As already mentioned, the spacer is designed and arranged in the maintenance position such that the safety distance provided by the barrier to the car wall or to the passing elevator components is ensured at a predetermined height above a floor of the elevator car. It is understood that the barrier can extend to the floor at a constant distance and not only ensures the safety distance at a certain height.

The invention also relates to a lift, z. B. in a building, with a lift cabin as described herein.

From the following detailed description and the totality of the claims, further advantageous embodiments and feature combinations of the invention result.

Fig. 1

eine Schnittansicht einer Liftkabine mit Wartungsfenster mit einem als Bügel ausgebildeten Abstandhalter;

Fig. 2

eine senkrechte Draufsicht auf einen Ausschnitt einer Kabinenwand einer erfindungsgemässen Liftkabine mit einem Wartungsfenster mit einem Bügel in einer Wartungsstellung;

Fig. 3

eine Ansicht der Anordnung der Fig. 2 mit Blickrichtung parallel zur Kabinenwand und von oben her senkrecht auf den Kabinenboden;

Fig. 4

eine analoge Ansicht wie in Fig. 2, wobei der Bügel in einer Ruhestellung ist. Grundsätzlich sind in den Figuren einander entsprechende Teile mit gleichen Bezugszeichen versehen.

The drawings used to explain the embodiments show schematically:

Fig. 1

a sectional view of a lift cabin with maintenance window with a trained as a bracket spacer;

Fig. 2

a vertical plan view of a section of a cabin wall of an inventive elevator car with a maintenance window with a bracket in a maintenance position;

Fig. 3

a view of the arrangement of Fig. 2 with view parallel to the cabin wall and from above perpendicular to the cabin floor;

Fig. 4

an analogous view as in Fig. 2 , wherein the bracket is in a rest position. Basically, corresponding parts are provided with the same reference numerals in the figures.

FIG. 1 shows a sectional view of a lift cabin 1 with maintenance window 2 with a trained as a bracket 8 spacers. In the present case, "downwards" designates a direction toward a cabin floor of the elevator cabin 1.

The elevator car 1 is arranged in a lift shaft 17, with 17 different elevator components 18 being located between the elevator car 1 and a wall of the elevator shaft 17. Depending on the type of lift system, the elevator components 18 may comprise cables, rails, drives, counterweights, etc., and in the present case are indicated only as two cables. Preferably, the elevator components 18 are arranged only to one side of the elevator car 1. The elevator components 18 are thus accessible through the maintenance window 2, which is formed on a corresponding cabin wall 3.

In the normal case, ie in normal operation, an opening 4 of the maintenance window 3 is closed by a panel 5 (not shown). The opening 4 is arranged in an opening plane A, which coincides with a plane of the cabin wall 3. In case of maintenance, the maintenance window 2 can be opened, for example by being completely removable. During maintenance, the Panel 5 can be parked on a cabin floor or, as in Fig. 1 shown, are hung on a handrail on the cabin wall 3 (shown in phantom).

A first protective contact 7 is arranged on an upper edge of the opening 4 such that a presence of the panel 5 in the opening 4 can be detected, d. H. when the opening 4 is closed by the panel 5 in a normal position. Preferably, the protective contact 7 can be activated directly by the panel 5 when it closes the opening 4. When the protective contact 7 is activated, normal travel is possible, e.g. in normal operation. A controller (not shown) of the safety device, comprising the protective contact 7, z. B. integrated into a control of the elevator car or the lift system or be designed as a separate unit.

In a rest position (shown in dashed lines) formed as a bracket 8 spacers outside the elevator car 1 in the region of the opening 4 is arranged. The bracket 8 is, for example, in normal operation of the lift system in the rest position. In this position, a plane B of the bracket 8 is parallel to an outer side of the cabin wall 3, offset from this outside. The bracket 8 is thus stowed space saving on the outside of the elevator car 1.

When the maintenance window 2 is open, the protective contact 7 is deactivated and thus prevents the elevator car 1 from traveling, as long as there is no safety barrier provided by the bracket 8. A lift fitter can now the bracket 8 z. B. move manually in a maintenance position in which the bracket 8 ensures a barrier at a safe distance from the maintenance window 2 and to the elevator components 18. In the maintenance position, the ironing plane B is arranged largely perpendicular to the cabin wall 3, so that the bracket 8 protrudes as far as possible into the cabin interior. In the present case, the bracket 8 outside the elevator car 1 is attached to this substantially pivotable, so that it is pivotable from the rest position through the opening 4 in the cabin interior in the maintenance position. The bracket 8 is designed such that a safety barrier is provided at a distance D from the cabin wall 3.

Another protective contact 15 of the safety device monitors the position of the bracket 8. In particular, the protective contact 15 can be activated when the bracket 8 enters the maintenance position. Upon activation of the protective contact 15 a revision drive is released, for example via the mentioned control of the safety device.

FIG. 2 shows a vertical plan view of a section of the cabin wall 3 of the inventive elevator car 1 with the maintenance window 2. The viewing direction is directed from the cabin inside perpendicular to the cabin wall 3. FIG. 3 shows a view of the arrangement of Fig. 2 with a view parallel to the cabin wall 3, from above perpendicular to the cabin floor. The following are Fig. 2 and 3 described together.

The clear opening 4 of the maintenance window 2 is formed in the plane of the cabin wall 3. The panel 5 has an opening corresponding to the 4 outline and can be used in this (dashed lines indicated). On the panel 5, a lock 6 is centrally located in an upper area, with which the panel 5 can be locked in the opening 4 in a normal position. In the normal position, the panel 5 closes the opening 4. In a region at the upper right corner of the opening 4 of the protective contact 7 is arranged. With the protective contact 7 can be determined whether the panel 5 is in the normal position.

The designed as a U-shaped bracket 8 spacer is perpendicular to the cabin wall 3 projecting into the cabin interior, fixed to carriers 9 of the elevator car 1. The carriers 9 are fixedly arranged in the region of the clear opening 4 on both sides outside the cabin wall 3. The carriers 9 each have an opening 4 facing side surface 9.1, to which the bracket 8, each with one of its arms 8.2 is attached. The bracket 8 protrudes from the outside arranged carriers 9 through the opening 4 in the cabin interior. In the interior of the cabin, the bracket 8 spans the opening 4 over its substantially entire width with a connecting section 8.1 connecting the arms 8.2. The connecting portion 8.1 is spaced at a safety distance D from the cabin wall 3 and from the plane A of the opening 4 inwardly.

At the arms 8.2 of the bracket 8 9 are laterally angled mounting lugs 10 for attachment to the carriers. The fastening lugs 10 are formed as profile strips with L-shaped cross-section. One of the side walls (side walls 10.1) of each attachment lug 10 is arranged parallel to the ironing plane B, while the other side wall (side walls 10.2) is oriented perpendicular to the plane B in each case. In the maintenance position of the Fig. 2 the side walls 10.1 are arranged below the bracket plane B, while the side walls 10.2 are arranged parallel to the side surfaces 9.1 of the carrier 9 and thus also parallel to the cabin wall 3.

The attachment lugs 10 each have two slots 11 which are open on one side and perpendicular to the two side walls 10.1 and 10.2. The slots 11 extend over both side walls 10.1 and 10.2 of the respective attachment lug 10 and are open at one end of an edge of the side walls 10.1.

The bracket 8 is mounted with the slots 11 at two arranged on the side surfaces 9.1 bolt 12. The bracket 8 can be fastened with wing nuts to the bolt 12. In the maintenance position of the Fig. 2 the side walls 10.2 of the attachment lugs 10 are clamped by the wing nuts on the carrier 9. The side walls 10.1 extend in the maintenance position below the bolt 12. The bracket 8 is also connected to both arms 8.2 via a respective designed as a safety chain captive 13 with the bolts 10. If the bracket 8 slide off when loosening the wing nuts of the bolts 12, he can not fall into the elevator shaft in this way.

The side walls 10.1 of the attachment lugs 10 continue in opposite direction of the attachment lugs 10 on the respective arm 8.2 of the bracket 8 also in extensions 14 away. Below one of the extensions 14, in the view of Fig. 2 on the right side, a protective contact 15 is arranged. On an upper side, the protective contact 15 has a contact surface for activation. The protective contact 15 is arranged on a cross-member 16 spanning the opening 4. The right-hand extension 14 contacts the contact surface of the protective contact 15 in the maintenance position and activates it. By the protective contact 15 can thus be determined that the bracket 8 is in the maintenance position.

FIG. 4 shows an analogue view like Fig. 2 , wherein the spacer is in a rest position.

To the transition from the maintenance position ( Fig. 4 ) in the rest position ( Fig. 2 ), the wing nuts of the bolts 12 are detachable. Due to the slots 11 of the bracket 8 can be pivoted with dissolved wing nuts on the bolts 12 pivoted downwards. The bolts 12 slide in the slots 11 of the side walls 10.2 in the side walls 10.1. The side walls 10.2 are pivoted upwardly and are arranged in the rest position above the bolts 12. The bolts 12 are spaced more than the distance D with respect to a lower edge of the opening 4, so that the bracket 8 can be pivoted downwards and through the opening 4 to the outside. The ironing plane B is arranged in the rest position outside the cabin wall 3 parallel to the plane A and the side surfaces 9.1 of the carrier 9.

By the pivoting of the bracket 8 in the transition to the rest position of the extension 14 is lifted at the protective contact 15 of the contact surface upwards and also pivoted. The protective contact 15 is thus deactivated, whereby a normal drive and a revision drive the elevator car 1 is locked, as long as the panel 5 is not in the normal position.

By tightening the wing nuts, the side walls 10.1 of the attachment lugs 10 can be clamped to the carriers 9. The bracket 8 is thus fixed in the rest position. The panel 5 can be inserted into the opening 4 (normal position), wherein the bracket 8 is covered. By inserting the panel 5 of the protective contact 7 is activated, whereby a normal drive is released.

Claims (14)

Lift cabin (1) with a side maintenance window (2) and a panel (5) which in an normal position openably covers an opening (4) of the maintenance window (2), a spacer (8) which in the maintenance window (2) in such a maintenance position can be brought, in particular with the maintenance window open (2), that a barrier at a safe distance to passing elevator components (18) is provided, and with a safety device which monitors whether the panel (5) in the normal position and whether the spacer ( 8) is in the maintenance position, which safety device a normal drive and a revision drive the elevator car (1) locks when the panel (5) is not in the normal position and the spacer is not in the maintenance position and through which safety device a revision ride is only available when the spacer (8) is in the service position. Lift cabin (1) according to claim 1, characterized in that a revision drive can be automatically released by the safety device as soon as the spacer (8) is in the maintenance position. Lift cabin (1) according to one of claims 1 or 2, characterized in that the safety device comprises a first safety contact (7) which can be activated by the panel (5) is brought into the normal position. Lift cabin (1) according to one of claims 1 to 3, characterized in that the safety device comprises a second safety contact (15) which can be activated by the spacer (8) is brought into the maintenance position. Lift cabin (1) according to one of claims 1 to 4, characterized in that the spacer (8) is arranged in the maintenance position largely perpendicular to a cabin wall (3) on which the maintenance window (2) is formed. Lift cabin (1) according to one of claims 1 to 5, characterized in that the spacer (8) in the maintenance position through the maintenance window (2) protrudes into the cabin interior. Lift cabin (1) according to one of claims 1 to 6, characterized in that the spacer (8) is movably mounted on the elevator car (1), wherein it can be brought from the maintenance position into a rest position. Lift cabin (1) according to claim 7, characterized in that the spacer (8) between the rest position and the maintenance position is pivotally mounted on the elevator car (1). Lift cabin (1) according to one of claims 7 or 8, characterized in that the spacer (8) is arranged in the rest position such that it can be covered by the panel (5) when it is brought into the normal position. Lift cabin (1) according to one of claims 1 to 9, characterized in that the spacer (8) extends substantially over the entire width of the opening (4) of the maintenance window (2). Lift cabin (1) according to one of claims 1 to 10, characterized in that the spacer (8) comprises a, in particular U-shaped, bracket (8). Lift cabin (1) according to any one of claims 1 to 11, characterized in that the spacer (8) is designed and arranged in the maintenance position such that the safety distance provided by the barrier ensures a predetermined height above a floor of the elevator car (1) is. Lift cabin (1) according to one of claims 1 to 12, characterized in that the panel (5) in the normal position via a locking device (6) is lockable. Lift installation with a lift cabin (1) according to one of Claims 1 to 13.

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