Abstract:
A hardware fitting for an all-glass door, including a first fitting half arrangeable on an outer side of the door, a second fitting half arrangeable on an inner side of the door, an actuatable nut arranged between the first and second fitting halves, a lock having a locking bolt and arranged between the first and second fitting halves, and a door stop integrated into at least one of the first and second fitting halves. The locking bolt is slidable between a retracted and an extended position in response to a movement of the nut.

Description:
PRIORITY CLAIM 
   This is a U.S. national stage of application No. PCT/EP03/02449, filed on Mar. 11, 2003. Priority is claimed on that application and on the following application(s): Country: Germany, Application No.: 102 10 479.4, Filed: Mar. 11, 2002. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The invention pertains to a hardware fitting for a glass door, the fitting including two halves. 
   2. Description of the Prior Art 
   Hardware fittings for glass doors are used primarily for the doors of baths, showers, changing rooms, etc. These fittings have either pushbuttons or a knob. Inside the front plate of the fitting is a means of displaying information, which tells the person approaching a door of this type whether the door is open or has already been locked from the inside. These types of “occupied” or “unoccupied” signs are designed with another button next to the pushbutton. The additional button travels outward upon rotation of the locking bolt of the lock and simultaneously rotates a disk, which conveys the information to the outside that the booth is occupied. In these types of locks, a latch is also provided in addition to the bolt; this latch is actuated by the pushbuttons, which act by way of a nut. 
   SUMMARY OF THE INVENTION  
   An object of the present invention is to provide an aesthetically attractive hardware fitting for a glass door, which serves several functions in the smallest possible space and which can also be manufactured at low cost. 
   This task is accomplished by a hardware fitting for a glass doors comprising two halves, with a lock having a locking bolt arranged between the two halves. The locking bolt is slidable inward and outward by a nut. Furthermore, a doorstop is integrated into at least one of the two halves. 
   According to the invention, a hardware fitting is proposed which consists essentially of two opposing halves, between which a lock is integrated, and which also has a stop for the door integrated into at least one of the two halves of the fitting. Each of the two halves can consist of, for example, a knob, the external form of which can be adapted aesthetically to the circumstances in question. A knob consists preferably of a round (cylindrical) component, the outward-projecting external surface of which has a certain slant. The knob that is on the outside, for example, is designed so that it has a gripping recess underneath, so that the door can be more easily pulled by the user. In addition, an emergency opening is provided inside a central bore, so that, in an emergency, a door of this type can also be opened from the outside. 
   The knob that is inside the closed booth also has a slanted outer surface. In contrast to the outside knob, the inside knob can be rotated, so that a locking bolt can be pushed out or pulled in by way of a nut. The locking bolt is located between the two halves of the fitting and is covered in the direction toward the edge of the door by plates on the two halves of the fitting. The locking bolt is designed as a two-stage bolt, which cooperates with a nut, which has two drivers and a stop. This stop acts on the bolt when the bolt is being pulled in. As a result of the two-stage design of the tailpiece of the bolt, the bolt is pushed out of the housing of the hardware fitting by the first driver when the knob is rotated. The second driver of the nut is designed to contact the driver of the second stage of the tailpiece and thus simultaneously has the effect of making the bolt self-locking with respect to deliberate attempts to push it back in the opposite direction. 
   The outer area of the inside knob is designed to consist of two different materials. One of these materials has a much lower Shore hardness than the other material. The material with the low Shore hardness, which can be a rubbery compound, for example, can be integrated into the knob either as a coating or as a separate component. For aesthetic reasons, it has been found that the projecting area of the slanted edge should extend up to about the middle of the knob. The material with the lower Shore hardness means that this half of the fitting simultaneously acts as a stop for the door against the wall located behind it. 
   So that the knob can be rotated more conveniently, the knob has projections on at least part of its outer circumference, which make it easy to grip and turn the knob. 
   The two halves of the hardware fitting are connected to each other by locating pins, which center the two halves on each other. The two halves are then tightened against each other in both a positive and nonpositive manner by a locking screw in such a way that the locking bolt is still able travel in and out easily in the middle area of the fitting. 
   Whereas the outside knob is connected permanently to the plate and thus to the one half of the fitting, the inside knob is designed to be installed positively on a square driver and locked in place from the outside by a fastening screw. 
   Inside the plates of the fitting, there is a display device, which tells the user both inside and outside the booth whether the door to which it is attached is locked or not. The display indicator consists of areas on the locking bolt, e.g., a green area for the unoccupied state and a red area for the occupied state. 
   The hardware fitting can be produced preferably of brass, light metal, special steel, or plastic. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the drawings, wherein like reference characters denote similar elements throughout the several views: 
       FIG. 1  is a perspective view of a hardware fitting, where the half of the fitting which is located inside the space to be closed off is facing forward; 
       FIG. 2  is a perspective view of the hardware fitting of  FIG. 1 , where the half which faces the outside can be seen in the foreground; 
       FIG. 3  is a side view of the hardware fitting according to  FIGS. 1 and 2 ; 
       FIG. 4  is a view of the outside-facing half of the hardware fitting with its installed locking bolt, seen from the outside; 
       FIG. 5  is a view of the locking bolt and associated nut in the retracted position of the locking bolt; and 
       FIG. 6  is a view of the locking bolt and associated nut in the extended position of the locking bolt. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1  shows a hardware fitting  1  according to the invention, which consists essentially of a fitting half  2  (attached to the inside surface of the door) and a fitting half  3  (attached to the outside surface of the door). In the exemplary embodiment of  FIG. 1 , the gripping elements of the two halves  2 ,  3  are designed as knobs. 
   The inside knob consists of an upper knob part  10  and a lower knob part  11 . These two knob parts  10 ,  11  have different Shore hardnesses, the lower knob part  11  having the lower Shore hardness. The lower knob part  11  has a projecting area, which is used as a stop  26  (see  FIG. 3 ) for the door. The outside knob  12  and the inside knob with its knob parts  10  and  11  are designed as cylindrical components The division between the two different materials of the inside knob is shown by a corresponding joint line  37 , wherein the joint line  37  has an offset  14  for aesthetic reasons. On the cylindrical circumference, the material with the lower Shore hardness extends beyond the circumference of the knob and is provided with projections  13 . These make it easier to grip the inside knob when it is to be turned in the directions of the arrow  16  to actuate the locking bolt. So that the knob perform its function when rotated, a recess is located inside the knob, which can be mounted positively on a driver  25 , which works together with the nut. The fitting half  2  is secured to the driver  25  by a fastening screw  27 , which is screwed against the driver  25 . 
   It is clear from  FIG. 3  that the two halves  2 ,  3  of the fitting rest against rosettes or circular flanges  7 , which have a bevel  15  in their outer circumferential area.  FIG. 3  also shows that the outer surfaces  17  of the two halves,  2 ,  3  of the fitting are slanted. This is important especially for the integrated stop  26 . Because of its lower Shore hardness, the stop  26  can damp the impact which occurs when the fitting half  2  meets the wall. The rosettes  7  of the two halves  2 ,  3  of the fitting have lateral plates  8 , through each of which a hole  9  passes. The hole  9  serves as a display device to show whether the booth behind the door is occupied or not. For this purpose, markings such as colored areas can be provided on a locking bolt  4 . When the locking bolt  4  is extended, therefore, a “red” display field  29  is seen. When the locking bolt  4  is retracted, however, a “green” display field  28  becomes visible. 
   In contrast to the fitting half  2 , the fitting half  3  is not connected rotatably to the other components, specifically to the nut. The fitting half  3  is designed again as a cylindrical component, which also has a slanted outer surface  17 . Nevertheless, two different materials are not used. So that the fitting half  3  can be gripped more effectively, a recess  20  is provided, preferably underneath, so that the door can be pulled more conveniently. 
   Centered in the fitting half  3  there is a bore  18 , through which a screw in the form of a connecting mandrel  22  passes. Whereas one end of the connecting mandrel  22  has a square head, which engages in the nut  24 , the other end has a device  19 , which makes an emergency opening possible. This can be, for example, a recess, designed in the form of a slot, so that for example, a tool can be used to open the bolted door in an emergency. The plate  8 , through which the hole  9  passes, is also located on the fitting half  3  on this side. The plate can thus function again as a display device in conjunction with the display fields  28 ,  29  on the locking bolt  4 . 
   The way in which the locking bolt  4  is installed in the hardware fitting  1  can be seen in  FIG. 4 .  FIG. 4  also shows that locating pins  6  extend from the one half  2 , for example, and engage in the other half  3 . The locating pins  6  are driven permanently into one or the other of the two halves  2 ,  3  and can be inserted loosely in the other half. As a result, the two halves of the fitting are centered and aligned inside a cutout in the glass (i.e., in the door, not shown). The two halves  2 ,  3  are connected by a locking screw  23 , which is preferably not on the axis of the nut  24 . 
   The schematic diagrams of  FIGS. 5 and 6  show the locking bolt  4  with the nut  24 . Whereas the locking bolt  4  has traveled into the hardware fitting  1  in the diagram according to  FIG. 4 ,  FIG. 6  shows the locking bolt  4  after it has traveled out of the fitting. i.e., in an extended position. 
   On the locking bolt  4  there is a tailpiece  38 , on which a driver  33  and a driver  34  are formed. In addition, a stop  35  is also present on the tailpiece  38 . In the “open position”, i.e., the retracted position of the locking bolt  4 , shown in  FIG. 5 , a stop  32 , which is present on the nut  24 , rests against the driver  33 . This prevents the locking bolt  4  from moving any further inward when one tries to further rotate the nut  24 . When the nut  24  is now turned to the left in  FIG. 5 , the driver  30  of the nut  24  engages in the first stage, that is, the driver  30  contacts the driver  33  of the tailpiece  38  and thus moves the locking bolt  4  out of the fitting  1  and into its locking position or extended position. After the driver  30  is no longer in contact with the driver  33 , the driver  31  of the nut  24  comes to rest against the driver  34  of the tailpiece  38 . Because the driver  31  has a rounded external contour and is wider than the driver  30 , the driver  31  also comes to rest against a stop  35  of the tailpiece  38 . Thus it is no longer possible for the locking bolt  4  to travel any farther outward. At the same, time, however, this position of the nut  24  ensures a self-locking of the locking bolt  4  against unintentional travel in the reverse direction.