Abstract:
An elevator having a car with a car roof includes a barrier on the roof for anti-fall safety purposes. The barrier has a toeboard, and at least some of the cables for the cabin electrical system are routed within the toeboard.

Description:
FIELD 
       [0001]    The invention concerns an elevator having a car with a roof and a barrier arranged on at least one side of the roof to provide anti-fall safety protection. 
       BACKGROUND 
       [0002]    Elevators feature cars, which, via means of support, for example in the form of supporting cables, or supporting belts, can be moved up and down in an elevator shaft by means of a drive unit. For particular situations such as, for example, maintenance tasks or inspections, it is necessary for persons to spend time on the elevator car roof. If the width of a gap between the car and the adjacent shaft wall is too large, barriers must be installed on the car roof to provide anti-fall safety protection. 
         [0003]    As a general rule various items of electrical or electromechanical equipment and installations necessary for operation of the elevator system are arranged on or in the elevator car. These items of equipment and installations, hereinafter referred to as the “car electrical system”, include, for example, the door controller, equipment for the evaluation of shaft information and for door monitoring, equipment for operating the system during maintenance, communications equipment, energy storage devices, car lighting or air conditioning systems. The car electrical system is supplied with power by way of cables, and at least elements of the car electrical system can communicate with one another by means of cables. Such cables are also located in the region of the car roof. In practice, the cables are often arranged on the car roof in a more or less exposed manner. The result is a disadvantageous organization of the cables and a safety risk in the form of “trip hazards” for the service personnel on the car roof. In principle, the cables could also be routed in a kind of double floor underneath the car roof, but this would be expensive and complex. 
       SUMMARY 
       [0004]    It is therefore an object of the present invention to avoid the known disadvantages, and in particular to provide an elevator in which cables of the car electrical system can be arranged simply and in a space-saving manner on the car roof. In particular, the cables should not represent a risk for any persons located on the car roof. 
         [0005]    The said objects are achieved with an elevator having a barrier to provide anti-fall safety protection arranged on at least one side of the roof of the car. The barrier has at least one bar, in particular a handrail formed from a bar and a toeboard, formed from a bar, which is fixed on an upper side of the car roof and arranged underneath the handrail. An additional intermediate bar can, if required, be arranged underneath the handrail as a third rail, preferably at mid height. By virtue of the fact that at least some of the cables of the car electrical system are or can be routed within at least one of the bars, the said cables can be organized simply and in a space-saving manner on the car roof. Any unintended encroachment on the cables, or possibly even stumbling over the cables can be ruled out for practical purposes. Since no complex additional measures are required the inventive solution also has advantages in terms of cost. 
         [0006]    The bar, such as, for example, the toeboard, can feature a hollow profile forming a cavity for purposes of accommodating the cables. Alternatively the bar can feature an open, trough-shaped profile, which together with an upper side of the car roof forms a cavity for purposes of accommodating the cables. The trough-shaped profile can be configured as one part, or as multiple parts. The hollow profile could, for example, be a round tube. For the installation on the roof it can, however, be advantageous if the hollow profile is a rectangular profile. The trough-shaped profile can also have a rectangular shape. Needless to say, however, other shapes for the trough-shaped profile, or for the hollow profile, would also be conceivable. The arrangement is simple to manipulate and simple to assemble and disassemble. 
         [0007]    For the housing of a plurality of cables it can be advantageous if the hollow profile or the trough-shaped profile is at least 8 cm high, and preferably is at least 10 cm high. In this manner a sufficiently large cavity ensues for purposes of accommodating the cables. The high toeboards can also serve as a stop for shoes and a kick plate for persons on the car roof. The hollow profile or the trough-shaped profile can, for example, consist of a metallic material. Needless to say, however, it would also be conceivable in principle to produce the toeboard from a plastic or another material. 
         [0008]    It can be advantageous if the trough-shaped profile has at least one sidewall projecting from the car roof and an attachment section adjoining the sidewall, wherein the attachment section lies flat, or can lie flat, on the car roof. Particularly preferably the trough-shaped profile has sidewalls projecting at right angles from the car roof, wherein an attachment section adjoins each sidewall. Such a trough-shaped profile can thus be a top hat-profile or an omega-profile. 
         [0009]    Furthermore it can be advantageous if the bar is constructed from at least two profiled parts that can be assembled together. Such a bar in at least two parts enables a simple introduction or removal into or out of the bar. 
         [0010]    If the cable-routing bar is a toeboard, the toeboard can feature detent means, which prevent encroachment on the toeboard. In addition to the increase in safety, by virtue of the detent means it is possible to prevent the toeboard from being deformed or even destroyed as a result of encroachment. 
         [0011]    The toeboard can, for example, comprise a freestanding detent section directed away from the car floor as the detent means. The detent section can be a vertical section on a sidewall of the trough-shaped profile, or adjoining the hollow profile. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0012]    Further individual features and advantages of the invention ensue from the following description of examples of embodiment and from the figures. Here: 
           [0013]      FIG. 1  shows a simplified illustration of an inventive elevator in perspective, 
           [0014]      FIG. 2  shows a side view of the elevator in  FIG. 1  with a barrier arranged on a car roof, 
           [0015]      FIG. 3  shows an enlarged illustration of a toeboard of a barrier for an elevator in cross-section, 
           [0016]      FIG. 4  shows an alternative toeboard, and 
           [0017]      FIG. 5  shows a further variant of a toeboard for a barrier for an elevator. 
       
    
    
     DETAILED DESCRIPTION 
       [0018]      FIG. 1  shows an upper part of an elevator car  2  of an elevator  1 . The elevator  1  features a car  2  that can be moved up and down for purposes of transporting persons or goods. The movement of the car  2  takes place, for example, by way of means of support (not shown here), which support the car, or on which the car is suspended. The means of support can, for example, be one or a plurality of supporting cables or supporting belts. An elevator shaft, in which the elevator car  2  can travel, is indicated in outline and designated as  3 . The car  2  is closed off with respect to the head of the shaft by a car roof  4 . 
         [0019]    In the example of embodiment in accordance with  FIG. 1  a barrier  5  is arranged on the car roof  4 . Depending upon the car and the arrangement in the shaft the car  2  could, needless to say, also have a plurality of barriers, assigned in each case to a side of the car. The barrier  5  consists of an upper handrail  6 , a central rail  7  arranged approximately at half height, and a toeboard  10  on the floor. Two vertical posts  23  are, for example, provided for purposes of supporting the rail  7  and the handrail  6 . The car electrical system is symbolically illustrated in  FIG. 1  by a box  8 . Cables designated as  9  lead to or from this box. It can be seen that the cables  9  of the car electrical system  8  are routed within the toeboard  10 . However, it would also be conceivable to route the cables through the handrail  6  formed from a bar, or through the intermediate rail  7  formed from a bar. Here the handrail  6  or the intermediate rail  7  can be produced from an appropriate hollow profile. 
         [0020]    From the side view in  FIG. 2 , the principles of construction of a barrier  5  for purposes of arrangement on a car roof  4  can once again be seen. Between the shaft wall of the elevator roof  3  and the car sidewall  25  is located a comparatively large clearance volume, for which reason the barrier  5  is to be arranged in the region of the corresponding side of the car roof  4 . As can clearly be seen from  FIG. 2 , the toeboard  10  has at its disposal a significantly larger volume compared with that of the handrail  6 , and also compared with that of the central rail  7 . By virtue of the larger cross-section it is possible to route a large number of cables (not shown in  FIG. 2 ) within the toeboard  10 . Design details for the configuration of cable-routing toeboards can be seen in the following  FIGS. 3 to 5 . 
         [0021]    In  FIG. 3  the toeboard  10  is formed from a two-part, trough-shaped profile  13 . The profile  13  is in principle an open top hat-profile, which in the assembled state forms together with an upper side of the car roof  4  a cavity  11  for purposes of accommodating the cables  9 . The toeboard  10  is composed of a first profile section  19  and a second profile section  20 , which are connected with one another by means of (symbolically indicated) means of connection  21  (e.g. screws). Each profile section  19 ,  20 , has a sidewall  15 ,  24  projecting vertically, that is to say, at right angles, from the car roof. Each sidewall  15 ,  24  is adjoined by an attachment section  17 ,  18  lying flat on the car roof  4 . On the left-hand side the trough-shaped profile is connected by way of the attachment section  17  with the car roof, for example, by means of screws  14  or other means of attachment. On the opposite side, or right-hand side, that is to say, the trough-shaped profile  13  is connected by the attachment section  18  with the car roof  4 , preferably with the same kind of means of attachment. A cover section adjoining the sidewall  15  at right angles is designated as  16 ; this closes off the cavity  11  in the upward direction. The dimensions of the toeboard  10  are designated as h and b. The height h of the toeboard is, for example, at least 8 cm, and preferably at least 10 cm. The width b can, for example, also be at least 8 cm, and preferably at least 10 cm. In this manner a sufficiently large cavity  11  can be created for purposes of accommodating the cables. The profile sections  19  and  20  can, for example, be simply produced from a metal sheet. Needless to say it would, however, also be conceivable in principle to produce the profile for the toeboard  10  from a plastic or another material. 
         [0022]    The toeboard  10  in accordance with  FIG. 4  has essentially the same basic shape as the toeboard in the preceding example of embodiment. Here, however, the toeboard  10  is formed from a one-part, trough-shaped profile  13 . The rectangular top hat-profile  13  has two sidewalls  15  and  15 ′ located opposite one another. A detent section  22 , which adjoins the inner sidewall  15 ′, is designed to prevent encroachment on the toeboard  10 . By the said inner sidewall  15 ′ is meant the wall of the toeboard facing the person that may be located on the car roof. The detent section  22  extending vertically upwards can extend beyond the cover section  16  by several centimeters (advantageously at least 5 cm). 
         [0023]    Instead of the above-described trough-shaped hollow profiles the toeboard could also be formed from other hollow profiles. Such a configuration is shown in  FIG. 5 . The toeboard  19  is formed from a rectangular hollow profile  12 . The said hollow profile  12  can, for example, be a rectangular tube of aluminum or possibly even of steel. Needless to say, however, top hat-profiles made from plastic would also be conceivable. 
         [0024]    In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.