Abstract:
An elevator shaft door frame has posts of a basic configuration that can be combined with cladding profile members of different shape and size. The posts include a plate-like profile member with two U-shaped corrugations and a plate fastened to the profile member and covering the open rear side of the corrugations. A decorative cladding profile member is fastened to the post and has one U-shaped profile member abutting and fastened to the plate and another U-shaped profile member abutting and fastened to the one U-shaped profile member.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a door frame for elevator shaft doors, wherein the door frame is assembled from at least two posts and an upper part. 
     Door frames of that kind are used for edging or trimming the rough masonry of the wall openings which lead to the elevator shaft. In that case special door frames have to be made for each installation respectively according to the size of the wall opening, the thickness of the masonry, the type of elevator shaft doors employed and the wishes of the customer. These different door frames must be fabricated and kept in stock, which contributes to cost increase of an elevator installation. 
     SUMMARY OF THE INVENTION 
     The present invention concerns an elevator shaft door frame and is therefore based on the object of providing a door frame which is in accordance with the two post and an upper part assembly, but does not have this disadvantage. 
     This object is met by the door frame according to the present invention. In that case, the posts are conceived as basic elements that can be combined with cladding profile members of different shape and size. 
     In a preferred embodiment, the posts each consist of a plate-like profile member with two U-shaped longitudinal corrugations formed therein having open front sides, and a plate fastened to the profile member and covering the open front sides of the corrugations. The door frame post includes a decorative cladding profile member fastened to the post, the cladding profile member having at least one U-shaped profile member abutting and fastened to the plate. The decorative cladding profile member has another U-shaped profile member abutting and fastened to the at least one U-shaped profile member. 
     The advantages achieved by the invention reside in the fact that a self-supporting, robust basic frame, in which the cladding profile members serve only for decoration and do not have a supporting function, is realized by the proposed door frame, so that it can be designed to be simpler and lighter. Further advantages result from the rational and therefore economic fabrication, which is achieved by the capability of combination, of door frames of different kind and size. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     The above, as well as other advantages of the present invention, will become readily apparent to those skilled in the art from the following detailed description of a preferred embodiment when considered in the light of the accompanying drawings in which: 
     FIG. 1 is a front elevation view of a door frame apparatus in accordance with the present invention; 
     FIG. 2 is a cross-sectional view taken along the line II—II in FIG. 1 in enlarged scale, with a first embodiment cladding profile member; 
     FIG. 3 is a cross-sectional view taken along the line III—III in FIG. 1 in reduced scale relative to FIG. 2; 
     FIG. 4 is a cross-sectional view similar to FIG. 2, but with a second embodiment cladding profile member; 
     FIG. 5 is a cross-sectional view similar to FIG. 2, with a third embodiment cladding profile member; 
     FIG. 6 is a cross-sectional view similar to FIG. 2, with a fourth embodiment cladding profile member; and 
     FIG. 7 is a cross-sectional view similar to FIG. 2, with a fifth embodiment cladding profile member. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     There is shown in FIGS. 1 to  3  a door frame  1 , that is constructed of at least two posts  2  and an upper part in the form of a crossbar  3 . The posts  2  consist of a plate-like profile member  4  with two U-shaped longitudinal corrugations  5  and  6  spaced apart and extending into the elevator shaft. A plate  7  is fastened to the profile member  4  covering the open front (hallway) side of the corrugations  5  and  6 . The posts  2  are fastened at an upper end to a surface of the building masonry  8  and at a lower end to a door threshold member (not illustrated). 
     A first cladding profile member  10  has, as shown in the FIG. 2 cross-section, a box-shaped, square form, wherein a first wall  10 . 1  of the cladding profile member  10  faces toward the building floor hallway, while a second wall  10 . 2 , connected to an edge of and extending at right angles to the first wall, defines the door opening width BT. The first wall  10 . 1  has a Z-shaped first bent-over portion  10 . 3  forming a flange  10 . 4  at an edge adjacent to the masonry  8 . Fastened to the cladding profile member  10  is U-shaped profile member  11 , which has a longer leg  11 . 1  abutting the flange  10 . 4  and a shorter leg  11 . 2  abutting an inner side of a second bent-over portion  10 . 5  of the wall  10 . 2 . The first cladding profile member  10  is fastened, by means of, for example, screw connections  12  to the posts  2 . 
     One of the first cladding profile members  10  is also used as a head member  13  of the door frame cladding (FIG. 3) and is, as not further illustrated and described, connected with the vertically extending cladding profile members  10  fastened to the posts  2 . Provided in the head member  13  is a bore  14  for the actuation of an unlocking device  15 , by means of which a shaft door  16  can be unlocked in emergency cases. 
     According to FIG. 4, a second embodiment cladding profile member  20  has the same construction as the first cladding profile member  10 , but is larger wherein, for example, first and second walls  20 . 1  and  20 . 2  are twice as wide as the walls  10 . 1  and  10 . 2  respectively. A first bent-over portion  20 . 3  is correspondingly wider than the bent-over portion  10 . 3 , while a flange  20 . 4  and a second bent-over portion  20 . 5  have the same dimensions as the flange  10 . 4  and the bent-over portion  10 . 5  respectively. In the first and second embodiments, the cladding profile members  10  and  20  are a first U-shaped profile member abutting and fastened to the second U-shaped profile member  11 . 
     According to FIG. 5, a third embodiment cladding profile member  30  has a first U-shaped profile member  31  with legs  31 . 1  (longer) and  31 . 2  (shorter) of unequal length, which legs are bent over and form oppositely extending first and second flanges  31 . 3  and  31 . 4  respectively. Fastened to the first U-shaped profile member  31  is a second U-shaped profile member  32  with legs  32 . 1  and  32 . 2  of unequal length, the shorter leg  32 . 1  of which is aligned with and extends in the opposite direction as the flange  31 . 3  and the longer leg  32 . 2  of which abuts the flange  31 . 4 . Contact surfaces for a further cladding element  33 , which, for example, can be made of marble, are formed by the leg  31 . 1  and the flange  31 . 3 . The third cladding profile member  30  is fastened to the posts  2  by means of the screw connections  12 . 
     A fourth embodiment cladding profile member  40  is shown in FIG. 6 as having a first U-shaped profile member  41 , one leg  41 . 1  of which has a bent-over flange  41 . 2  which is connected with a leg  42 . 1  of a second U-shaped profile member  42 . Contact surfaces for a further cladding element  43 , made of, for example, marble, are formed by the leg  41 . 1  and the flange  41 . 2  of the first U-shaped profile member  41 . The fourth cladding profile member  40  is fastened to the posts  2  by means of the screw connections  12 . 
     According to FIG. 7, a fifth embodiment cladding profile member  50 , that is particularly suitable for dry masonry, has a first U-shaped profile member  51 , at a first leg  51 . 1  of which a hook-shaped bent-over portion  51 . 2  is provided. A second, narrower U-shaped profile member  52  with legs of unequal length is fastened to the first U-shaped profile member  51 , wherein a shorter leg  52 . 1  abuts the inner side of another leg  51 . 3  of the first U-shaped profile member  51 . Arranged in the first U-shaped profile member  51  are reinforcing plates  53 , which engage at one end in the hook-shaped, bent-over portion  51 . 2  and rest at the other end by a first bent-over portion  53 . 1  on a longer leg  52 . 2  of the second U-shaped profile member  52 . The reinforcing plates  53  have a second bent-over portion  53 . 2  that bears against the inner wall of the first U-shaped profile member  51  and is fastened thereto by, for example, gluing. A third bent-over portion  53 . 3  of the reinforcing plates  53  serves for fastening to the dry masonry (not illustrated). The fifth cladding profile member  50  is fastened to the posts  2  by means of the screw connections  12 . 
     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.