HK1137006B - Elevator car with maintenance window - Google Patents

Description

Elevator car with maintenance window

Technical Field

The invention relates to an elevator car with a special maintenance window.

Background

The elevator must be periodically inspected and serviced. For this purpose, the following components are mainly checked and repaired: rail mountings, lifting ropes, lifting rope mountings, grooves for the drive drum or drive wheel of the traction drive, pulleys, limit switches, safety brake cables and their mountings, and guide means for the chassis or elevator car and counterweight. For most elevators, this is typically performed on the roof of the elevator car by an elevator service station. The top panel must be constructed as described in the specification and equipped with a railing. For inspection and maintenance, the elevator is moved slowly or stepwise through the track so that the elevator maintenance crew can see all the components and access all the parts he has to perform maintenance operations by hand, including retightening screws, applying lubricant to rotating parts, checking mechanical stress, checking the function of limit switches, etc. As an additional maintenance option, in some elevators it is possible to let the opening in the car roof or roof down into the car, whereafter the working platform can be swung down from the car roof so that it hangs vertically. The elevator maintenance worker can thus climb up the working platform from the elevator car via a ladder or from the floor via the opened elevator car. In other embodiments, a serviceman may reach the car roof from an upper floor and climb down a ladder from the car roof to a landing. When the elevator service man stands on the working platform, he protrudes from above the elevator car to an extent sufficient for him to be able to perform the necessary work in the elevator shaft. In a further embodiment, the wall of the cage is provided with a window, the frame of which can be swung open into the interior of the cage, or can be a sliding window, so that the shaft can be accessed from the side of the window. Examples of such solutions are described in WO01/79104, JP 10-231074 or EP 1031528B 1. Here, an access opening is disclosed which is provided on a side wall of the car and faces the transport device of the elevator, so that the hoisting device can be accessed inside the car through the access opening. However, in the solutions proposed above, it is not possible to perform all the maintenance work inside the cage at all times. In the case of WO01/79104 and JP 10-231074, the drive unit is located above the cage, and in the case of EP 1031528B 1, the guide rails of the cage itself are outside the area accessible from the cage, that is to say in the lateral area where the cage cannot be opened. Therefore, the fixing devices and the conditions of these guide rails cannot be checked from within the cage. Often even the rope guide and its mounting mechanism are in a position that is not accessible from the car.

Disclosure of Invention

The object of the invention is to provide an elevator car with a maintenance window for an elevator in which all components to be maintained and examined are arranged on only one side outside the elevator car and are thus accessible through the open car side wall. However, certain requirements need to be met for this purpose. Thus, for example, a minimum distance of 10cm must be maintained between the balustrade at the service station and the ropes or other moving parts of the transport device.

The above-mentioned problem is solved by an elevator car with a service window for an elevator, in which all components to be serviced and inspected are arranged on the outside of the elevator car, opposite only one side of the elevator car, characterized in that on this side a part of the car wall, which is arranged on the wall of the car at a height of 85cm above the floor of the car, is detachable from the interior of the car, wherein this part has a height of at least 95cm and can be rested on the wall of the car after removal in order to rest on the floor of the car to form a balustrade, wherein between this detachable part and a lower part of the wall of the car there is at least one spacer means, so that the distance from the inside of the part of the side wall placed on the floor and facing the car to the drive components of the elevator moving relative to the running elevator car is at least 10 cm.

Drawings

Such an elevator car is shown in the figures and its maintenance window is described and explained with reference to the figures.

Fig. 1 shows a view of an open elevator car as seen from an access door when the elevator car is in a run state;

fig. 2 shows a view from the access door into the open elevator cabin, with the upper part of the left side wall of the elevator cabin removed and placed on the car floor against the side wall;

fig. 3 schematically shows an elevator car wall, a balustrade and a safety device for operating the elevator car opening a service window;

fig. 4 schematically shows an elevator car wall, a balustrade and a safety device for operating the elevator car opening a service window;

fig. 5 shows a cross-sectional side view of the elevator car when the elevator car is in the uppermost position of the shaft and the maintenance window is closed;

fig. 6 shows a side elevation in longitudinal section of the elevator car when the elevator car is in the uppermost position of the shaft and the maintenance window is open and provided with a railing;

FIG. 7 shows a view of the elevator car when the elevator motor and guide rails are accessible through an open service window;

fig. 8 shows a view of the elevator shaft with the elevator motor and guide rails when the elevator car is lowered.

Detailed Description

In fig. 1, a view of an open elevator car as seen from an access door is shown. The elevator car is shown here in a state ready for operation. The side walls are constituted by plates 3, 6, 15, which are supported, for example, by side guide tabs 14 and are connected by plugs or screws where they meet the frame. The fuse rail 16 can be arranged, for example, extending horizontally above along the roof of the elevator car. It (fuse rail 16) may be equipped with a closing mechanism that can be opened by inserting a socket triangle wrench or square wrench into the hole 17 and rotating. A second elevator door 18, which is composed of two horizontally outwardly movable door parts, is arranged at the rear side of the cage. It can be seen that the left side wall is divided into an upper side wall portion 3 and a lower side wall portion 6. Between these two parts a transverse support 19 with a handrail 5 is arranged, where the handrail 5 is a chrome steel tube piece protruding a few centimeters from the side wall. (handrail 5) can also be provided as a belt fixed from behind without using a pipe. One feature here is that the upper side wall part 3 can be removed more easily from the elevator car side. First, the key is used to unlock the shut down mechanism to remove the fuse track 16. After removal of the fuse track 16, the side retaining strip 14 is detached. These (side holding strips 14) are inserted, for example, below the profile strips and are connected to the frame of the elevator car by means of screw plugs or screw connections. After removal of these side retaining strips 14, they can be e.g. leaned against the opposite machine compartment wall for temporary storage. The side edge of the upper side wall 3 is in an unconstrained state. The side edges of the upper side wall 3 can now be gripped by hand and lifted out of its bottom retaining profile, which extends along the upper edge of the lower side wall 6, and subsequently placed on the car floor 1.

This is shown in fig. 2. At this time, the detached side wall portion 3 is placed on the elevator car floor 1 and abuts against the armrest 5. Thus, all the elevation drive members requiring maintenance and inspection can be seen through the maintenance window formed above the side wall portion 3 placed on the floor, and can also be touched by hand. The detached side wall part 3 closes a contact switch (not shown here) mounted in a mounting position outside the elevator car. Once the sidewall part 3 is removed, the elevator car can no longer be moved. If the side wall part 3, preferably 100cm in height, is placed on the elevator car floor 1 and rests on the handrail 5, its upper edge 4 forms a railing for the elevator mechanic, who performs his work of servicing the elevator drive means through the now formed open service window. In order for the elevator car to be movable during work, which is performed even more through an open maintenance window, it must be ensured that there is always a certain distance of a minimum of 10cm between the railing and the closest part moving relative to the elevator car. The removed side wall part 3 is placed in front of the lower side wall part 6 and against the handrail 5, so that it can be used as a spacer. The elevator drive is made as small as possible to save space in the elevator shaft. Correspondingly, the supporting and hoisting ropes 7 and the guide rails 8 of the elevator car and the counterweight extend in a relatively short distance from the elevator car. As shown in the figure, by placing the detached side wall portion 3 inside the cage, a desired distance of 10cm can be easily maintained.

Next, in a second step, the side wall part 3 placed on the floor is fixed against falling, which also allows the elevator car to be moved again. This is illustrated in fig. 3, which shows that the upper side wall part 3 rests on the floor in front of the lower side wall part 6, seen from the side. Outside the elevator car a cable hanger 9 is mounted and the two pole cable 11 is led via the cable hanger 9 to an end plug 12. As shown, the plug 12 can be inserted into a socket 13, which socket 13 is mounted on the back side of the upper side wall 3 that can be removed. The two poles of the plug 12 are electrically connected with the two poles of the socket 13 respectively. Thus, once the plug 12 is inserted into the socket 13, the circuit is closed, thereby making the elevator car movable. This plug connection ensures on the one hand that the removable side wall part 3 does not topple over, and on the other hand that it closes the electric circuit so that the elevator car is movable. In this way, the elevator car is movable as soon as the detached side wall part 3 is placed correctly in front of the lower side wall part 6, whereby firstly the balustrade 4 is formed at the required minimum distance from the movable part, for example the hoisting ropes 7, and secondly the electric circuit controlling the travel of the elevator car is closed. However, the connection is only closed when the side wall parts 3 are correctly placed, since only then the plug 12 can be inserted into the socket 13 and the circuit closed.

In addition to the armrest 5, which here serves as a spacer for the side wall part 3, a bracket mounted on the backside of the side wall part 3 can also be used. This technical scheme is applicable to because space restriction and can't set up the lift of handrail. This is shown in fig. 4. The swingable bracket 19 rotates about a support 21, and the support 21 is mounted on the back side of the side wall portion 3. In the swung-down position, it (the bracket 19) merely hangs from the resistance support and projects slightly from the rear side of the side wall part 3. After placing the detached side wall part 3 on the car floor 1, the elevator mechanic can swing the bracket 19 upwards and place its end profile 20 on the upper edge of the lower side wall part 6. In this way, the required minimum distance of 10cm from the moving parts can also be maintained as shown, and the sidewall parts 3 do not topple over. The circuit can then also be closed as described in the description of fig. 3.

The above-mentioned removable side wall part 3 can be a glass plate which can be inserted into the profile strip 22 on the upper edge of the fixed side wall part 6 and fixed to the car wall part by means of the side retaining strip 14. Instead of glass plates, it is also possible to use transparent thin glass plates made of laminated glass, or wood plates, plastic plates or a combination of these materials.

Fig. 5 shows a cross-sectional side view of the elevator car when the elevator car is in the uppermost position of the shaft. It can be seen that in the uppermost position of the elevator car, the elevator motor 26 is located laterally beside the elevator car, or the elevator car can be moved until it is located beside the elevator motor 26. The supporting and lifting cables 7 extend in two planes, one of which is located beside the elevator car. In fig. 6, the maintenance window is open. The upper side wall part 3 is placed at a distance from the car floor 1 in front of the lower side wall part 6, respectively. Which (said certain distance) is delimited by a spacer means as described above, which spacer means is realized either by the fixed armrest 5 or by at least one spacer bracket 19, which spacer bracket 19 can be swung or opened if said spacer bracket 19 is to be used on the back side of the removable sidewall part 3. In fig. 6 it can be seen how the balustrade 4 is formed by the removable side wall portion 3. By this arrangement, the distance from the inside of the balustrade 4 to the first rope 7 can be easily maintained at a minimum of 10 cm.

Finally, fig. 7 shows a view of the elevator car when the elevator motor and the guide rails are accessible through an open service window. Here a traction drive with an outer drum serving as a drive drum and over which the rope 7 passes, the rope 7 not being shown here. As a particular feature, the traction drive is suspended on a bridge 25, which bridge 25 rests on the inner guide rail 23 for the counterweight via mounting brackets 27, while these brackets 27 are fixed on the outer guide rail 24 for the elevator car. The maintenance window opens all the way to the lower side wall 6, which is for example 90cm high. Which (maintenance window) extends substantially over the entire width of the elevator car. The removable side wall part 3 is now placed in front of the service window so that its upper edge 4 extends 10cm above the lower side wall part 6 and forms a railing. In the figures one can see a guide rail 23 for guiding the counterweight and a guide rail 24 extending parallel to the guide rail 23 for guiding the elevator car, whereby the guide rail 24 can be arranged outside the motor. However, this particular lift drive is not the subject of the present invention, but merely provides background information. The elevator car with the service window can also be used to implement other drive designs.

This elevator car with the maintenance window makes it possible for the first time to complete maintenance and inspection from the elevator car only. Of course, it is a prerequisite that all drive-related components are arranged on one side of the elevator car. For this purpose, the elevator car has an L-shaped base frame, and the guide rail for guiding the elevator car and the guide rail for guiding the counterweight extend behind a fixed arm of the L-shape (base frame). At the same time, the lifting motor is constructed in the usual manner, which is arranged behind the fixing arm of the L-shape (base frame), as are all the guide rollers, all the ropes and the fixing members of the rails and all the limit switches. In this way, all these components can be seen and accessed in the cage through the maintenance window. Because maintenance can be carried out only in the elevator car, the maintenance process is more comfortable and cleaner for elevator maintenance workers, and the maintenance is more rapid and safe to implement.

Claims (7)

1. Elevator car with a maintenance window for an elevator, in which elevator all components to be maintained and examined are arranged outside the elevator car, opposite only one side of the elevator car, characterized in that on this side an upper side wall (3) is arranged in a manner detachable from the inside of the car on a car wall (2) which is 85cm above the car floor (1), wherein the upper side wall (3) has a height of at least 95cm and can rest on the car wall (2) after removal, resting on the car floor (1) to form a balustrade (4), wherein between this upper side wall (3) and a lower side wall (6) of the car wall (2) there is at least one spacing means, so that the distance from the inside, which is placed on the floor (1) and faces the upper side wall (3) of the car, to the outside of the elevator can be varied as required by the length of the selected spacing means, in the design of each particular drive, the distance of the elevator drive members (7, 8) placed on the floor (1) and moving relative to the running elevator car towards the inside of the upper side wall (3) of the car is at least 10 cm.

2. Elevator car with maintenance window for an elevator according to claim 1, characterized in that the spacer means are formed by a horizontally arranged handrail which is constructed at a height of 800mm to 950mm on the car wall (2) and projects from the car wall (2).

3. Elevator car with service window for elevators according to claim 1, characterized in that the spacing means comprise at least one bracket (19) mounted on the back side of the upper side wall part (3), which bracket (19) can be opened or swung up so that it can be placed on the upper edge of the fixed lower side wall part (6) by means of the profile part (20).

4. An elevator car with a service window for an elevator according to any of the preceding claims, characterized in that the safety device is provided so that the elevator car with the upper side wall part (3) removed can only be moved when the removed upper side wall part (3) placed on the floor forms the balustrade (4), when the safety device forms a current loop comprising a cable hanger (9) on the outside of the car (10) and a two-pole cable (11) with a plug (12) protruding therefrom, wherein the plug (12) can be inserted into a socket (13) mounted on the back side of the upper side wall part (3), which socket (13) electrically connects the two poles therein.

5. Elevator car with maintenance window for elevators according to claim 4, characterized in that the removable upper side wall (3) is a glass plate, which can be inserted into a profile strip (22) on the upper edge of the fixed lower side wall (6) and fixed to the car wall by means of a side holding strip (14).

6. Elevator car with maintenance window for elevators according to claim 4, characterized in that the removable upper side wall (3) is a transparent thin glass sheet made of laminated glass, which can be inserted into a profile strip (22) on the upper edge of the fixed lower side wall (6) and fixed to the car wall by means of a side retaining strip (14).

7. Elevator car with maintenance window for elevators according to claim 4, characterized in that the removable upper side wall part (3) is a wooden plate, a plastic plate, a metal plate or a combination of these materials, wherein the upper side wall part (3) can be inserted into a profile strip (22) on the upper edge of the fixed lower side wall part (6) and fixed on the car wall part by means of a side retaining strip (14).