Abstract:
A swivel lever can be locked in a trough in a swiveled in position and comprises a locking device which is accommodated in the swivel lever and which can be unlocked by way of an access opening in the swivel lever. The access opening can be made inaccessible by means of a cover. The cover can be blocked mechanically, particularly electromechanically, in its covering position.

Description:
TECHNICAL FIELD  
       [0001]    The invention is directed to a swivel lever which can be locked in a trough in a swiveled in position and which comprises a locking device which is accommodated in the swivel lever and which can be unlocked by way of an access opening in the swivel lever, which access opening can be made inaccessible by means of a cover. 
       PRIOR ART  
       [0002]    A swivel lever of the type mentioned above is already known, for example, from DE 10 2004 013 369 A1. Reference is had in particular to  FIGS. 5A to 5C . It has turned out that this lock is frequently damaged as a result of vandalism, e.g., by spraying in an instant glue or tampering with the lock in some other manner. 
       OBJECT OF THE INVENTION  
       [0003]    Therefore, it is the object of the invention to prevent unauthorized persons from moving the cover out of its covering position. 
       SUMMARY OF THE INVENTION 
       [0004]    The above-stated object is met in that the cover can be blocked mechanically, particularly electromechanically, in its covering position. 
         [0005]    Access to the swivel lever lock is at least made more difficult in that the cover can be blocked in its covering position either mechanically or electromechanically. 
         [0006]    This reduces the risk of interference with the opening device by unauthorized persons or due to vandalism. 
         [0007]    According to a further development of the invention, the cover can be swiveled out of the covering position around an axis extending perpendicular to the extension of the lever. This arrangement is known, per se, from various references. However, the cover cannot be blocked in these arrangements, although devices may be provided which hold the cover in a frictional position or snap in position that defeats unwanted opening. 
         [0008]    According to a further development of the invention, the cover can be slid out of the covering position around an axis extending parallel to the lever extension. A solution of this kind is found in the prior art (see component part  132  in  FIGS. 5A ,  5 B and  5 C). 
         [0009]    According to another alternative, the cover can be folded away around an axis extending perpendicular to the lever extension and parallel to the fastening plane of the lock. 
         [0010]    According to a further development of the invention, the cover is blocked by means of a displaceably supported pin or slide. Alternatively, the cover can be blocked by means of a swivelably supported lever. 
         [0011]    The cover can be moved against spring force out of the blocking position or (alternatively) out of the releasing position, which facilitates handling. 
         [0012]    Accordingly, the cover can be blocked by means of a lock which is actuated by a lifting magnet or solenoid. Alternatively, the cover may be blocked by means of a motor-actuated lock. 
         [0013]    According to another embodiment form, the cover is provided for a lock which can be actuated by inserting a key. 
         [0014]    On the other hand, the cover can be provided for a profile (half-)cylinder. 
         [0015]    The electromechanical drive (e.g., solenoid or motor) can also be provided in a lock case of a bar lock. However, it is also possible to arrange the electromechanical drive in the area of the swivel lever lock. 
         [0016]    The electromechanical drive (e.g., solenoid or motor) can also be arranged in the lock case of a bar lock. 
         [0017]    It is advantageous when the electromechanical drive can be controlled by a sensor device such as a keypad, a sensing device for biological features (fingerprint, iris, voice, or the like), a code card with magnetic strips, or a chip, or the like. 
         [0018]    It is advantageous when the electromechanical drive is part of a monitoring network. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    The invention will be explained more fully in the following with reference to embodiment examples which are shown in the drawings. 
           [0020]    The drawings show: 
           [0021]      FIG. 1  a switch cabinet with a swivel lever device constructed according to the invention; 
           [0022]      FIG. 2  a rear view of the door leaf of the cabinet arrangement according to  FIG. 1  illustrating the invention in connection with a bar lock; 
           [0023]      FIG. 3  an alternative embodiment form with the cover in the blocked position in a view similar to that shown in  FIG. 2 ; 
           [0024]      FIG. 4  the embodiment form from  FIG. 3 , but in the released position; 
           [0025]      FIG. 5  the lock from  FIG. 1  with the cover swiveled away; 
           [0026]      FIG. 6  the lock from  FIG. 1 , but with the cover swiveled away and with the hand lever swiveled; and 
           [0027]      FIG. 7  another embodiment form. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0028]      FIG. 1  shows a switch cabinet  10  comprising a frame  12 , a door  14  and a swivel lever  16 . A swivel lever actuating device  16  is shown on the door leaf  14 . This swivel lever actuating device  16  can be locked in the position in which it is swiveled into the trough in a manner which is not shown in more detail. The opening for access to the lock is closed by a cover  18 . 
         [0029]    The back of the door leaf  14  (see  FIG. 2 ) shows that the swivel lever drive  16  shown in  FIG. 1  communicates with the lock case  20  for pushing the locking bars  22 ,  24  in and out to open or close the locks, not shown. 
         [0030]      FIG. 2  shows a locking device which in the embodiment form not shown in  FIG. 2  comprises a cylinder lock with a cam  30  (see  FIG. 3 ). It can also be seen from  FIG. 3  that the cam  30  extends into a trough shoulder  28  so that the swivel lever can no longer be folded out, i.e., the swivel lever is locked. 
         [0031]    In the embodiment form shown here, the cover  18  can be swiveled away (see  FIG. 6 ) out of the covering position around an axis  32  extending perpendicular to the door leaf plane. In so doing, a shaft piece  34  rotates. If this rotating movement is prevented, the cover cap  26  can no longer be swiveled around the axis  32  and is blocked, for example, in the covering position as is shown in  FIG. 1 . 
         [0032]    This blocking is achieved by means of a pin  38  shown in  FIG. 2 . This pin  38  penetrates into a bore hole  40  at the end of the shaft  34  so that the shaft can no longer be rotated, i.e., when the pin is located in the position shown in  FIG. 3 , the cover  18  lies in the covering position according to  FIG. 1  and cannot be rotated out of this position. As soon as the solenoid  36  is supplied with current via the connection lines  42  (or, alternatively, when the current is interrupted), the pin  38  is pulled out of the bore hole  40  and the cover  18  is accordingly released so that it can be rotated out of the covered position, for example, into the position shown in  FIG. 6 . 
         [0033]    The inward and outward movement of the pin  38  when the solenoid  36  is actuated can be carried out against spring force in such a way that the rotating movement and, e.g., the movement of the pin  38  into the bore hole  40  is carried out automatically when rotating into the covering position. 
         [0034]    The solenoid  36  and the shaft piece  34  with the bore hole  38  can be enclosed by a housing (see reference number  44  in  FIG. 2 ). 
         [0035]    An electronic device  46  can serve to trigger the current (or, alternatively to interrupt the current) in the solenoid and accordingly to release the cover  18 . This electronic device  46  can be arranged at a suitable location and remote of the locking lever  16 . In the present case, it is arranged next to the lock  16  at the door frame of the frame  12 . The electronic device  46  can comprise sensor devices which, for example, detect a fingerprint or the color of the iris, or a chip card or a transponder device which identifies a person. 
         [0036]      FIG. 3  shows the state with the pin  38  blocking the shaft piece  34 , while  FIG. 4  shows the state in which the pin is lifted and the shaft piece is released. 
         [0037]      FIG. 6  clearly shows the trough  48  with a bore hole  50  which extends through the opening  50  receiving the shaft piece  34 . The trough has the shoulder  28 , which extends through the corresponding rectangular opening of the door and is held by the latter, and a second fastening position by means of the lock case. 
         [0038]      FIG. 5  shows a profile cylinder  52 . It clearly shows that the swivel lever actuating device can serve not only as a drive for a bar lock, but also for other types of locks, for example, a rotary sash-type fastener. As such, the embodiment form shown in the drawing is only an example. It is likewise clear that the cylinder can be provided for another type of lock of the lever in the trough, for example, a key lock, not shown. In every case, it is important that a cover  26  is provided for the access to the unlocking of the hand lever  16 . 
         [0039]    The element, such as the pin  38 , blocking the shaft piece can also take other forms to which the shaft piece would then be adapted. For example, the pin could have a rectangular or square cross section, or could have the shape of a fork which engages the shaft piece, in this case, e.g., a rectangular shaft piece, so as to be fixed with respect to rotation relative to it. 
         [0040]    The assembly could be configured in such a way that the blocking of the cover is canceled in emergency situations such as a power outage, e.g., in that the pin or the fork is retracted by spring force and the cover is released so that the swivel lever can be unlocked with the appropriate key and folded out so that, for example, a bar lock can be unlocked by turning the swivel lever and, e.g., the cabinet can be opened. Therefore, in case of a power outage, the double safeguard becomes a single safeguard which is sufficient for general protection in most cases of application. 
       INDUSTRIAL APPLICABILITY  
       [0041]    The invention is industrially applicable in switch cabinet construction. 
       REFERENCE NUMBERS  
       [0000]    
       
           10  switch cabinet 
           12  frame 
           14  door 
           16  swivel lever actuating device 
           18  cover 
           20  lock case 
           22  locking bar 
           24  locking bar 
           26  protective cap 
           28  trough shoulder 
           30  cam 
           32  axis 
           34  shaft piece 
           36  solenoid, electromagnetic drive 
           38  pin 
           40  bore hole 
           42  connection line 
           44  housing 
           46  electronic device, sensor device 
           48  trough 
           50  opening 
           52  profile cylinder 
           54  access opening