Abstract:
A connection element for at least two mounting rails ( 1, 2, 30, 33, 38 ) and including a base member ( 4, 20, 28, 34 ) at least one attachment member having at least one connection opening ( 6, 39 ), and connection elements ( 7, 35, 36 ) for reasonably connecting the attachment member ( 5, 25, 31, 32, 37 ) with the base member ( 4, 20, 28, 34 ).

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a connection element for connecting mounting rails.  
           [0003]    2. Description of the Prior Art  
           [0004]    Connection elements for connecting mounting rails found a particular application in the pipe suspending systems. In order to suspend a pipe from a ceiling so that the pipe occupies a predetermined position, the mounting rails have to be connected with each other with sufficient flexibility. For flexibly connecting mounting rails with each other conventionally rail nuts with angles are used. An angle or angle element has a plurality of connection openings for attachment to a mounting rail at a predetermined position.  
           [0005]    A drawback of using angle elements consists in that different angle elements need to be used for attachment of two or more rails at attachment point in different attachment positions. Therefore, a large number of different angle elements is required. This is associated with substantial expenses and a need in a large storage space. This is because a large number of angle elements should be stocked. Furthermore, the necessity to use different angle elements for attachment of mounting rails in different positions limits the mounting flexibility at a site when, e.g., a suspension system requires an angle element or a bend other than originally planned.  
           [0006]    Accordingly, an object of the present invention is to provide a connection element for mounting rails suitable for different applications and which can be economically produced.  
         SUMMARY OF THE INVENTION  
         [0007]    This and other objects of the present invention, which will become apparent hereinafter, are achieved by providing a connection element for at least two mounting rails and including a base member at least one attachment member having at least one connection opening, and connection means for reasleasably connecting the attachment member with the base member.  
           [0008]    Because the connection element is formed as a modular element, a small number of parts is sufficient for forming a plurality of different connections. The base member is so formed that one or more attachment members can be secured thereto with the connection means. The connection means is formed as releasable means, permitting a correction of a position of the attachment member relative to the base member. The connection means, according to the present invention, significantly facilitate handling of the inventive connection element. This is because the positions of the members are predetermined. The connection means prevents rotation of the connected members relative to each other in their locked position. The manufacturing of the connection elements is significantly simplified in comparison with the prior art because instead of a number of different angle elements, only two parts for a connection element that provides for a plurality of different positions of the mounting rails should be produced. Storage is also significantly simplified. The invention connection element provides for more flexibility on a site.  
           [0009]    According to the present invention, to facilitate the assembly of the connection element, the connection means includes a plurality of openings formed in the base or attachment member, a plurality of pegs provided on another of the base and attachment members and engaging in respective openings, and thread elements for fixedly connecting the base and attachment members together.  
           [0010]    The openings in one of the member and the pegs on another member can be formed simply and economically. The number of openings and pegs determines the number of possible positions. The greater is the number the more positions of the attachment member relative to the base member can be obtained.  
           [0011]    According to an advantageous embodiment of the present invention, the openings are formed in the base member, and there are provided at least four openings symmetrically arranged about a bore formed in the base member for receiving a thread element, e.g., a screw or a bolt. The pegs are provided on the attachment member and include at least four pegs symmetrically arranged about a bore formed in the attachment member through which the thread element extends. With the above-described embodiment, there are provided four positions of the attachment member relative to the base member offset relative to each other by 90°. The central arrangement of the bore for the locking element of the connection means insures a uniform engagement of the pegs in respective openings and a uniform distribution of a load in the connection means. The bores are formed transverse to a longitudinal extent of the respective members, providing for a number of positions of the attachment and base members relative to each other.  
           [0012]    Advantageously, the base member has two side walls and a connection or bottom wall that connects two side wall, whereby a U-shaped profile is formed. The U-shaped profile insures an easy manufacture of the base member and its reliable attachment on mounting rail, without a possibility of rotation relative thereto.  
           [0013]    According to the present invention, the base member is provided, on one of its end surfaces, with a web and, on another of its end surfaces, with a pocket complementary to the web. The webs and the pockets insure that a row of base members can be formed by connection of several base members with each other, with the web of one base member engaging in the pocket of another base member.  
           [0014]    Advantageously, the central bore formed in the base member has an inner thread which forms part of the thread means that provides for a fixed connection between the attachment and base members. Naturally, the inner thread can be provided in the central bore of the attachment member. However, from the economical point of view, it is preferable to provide the bore of the base member with the inner thread as, generally, a greater number of attachment members than of base members is produced.  
           [0015]    According to a particularly advantageous embodiment of the present invention, the attachment member is formed of mutually perpendicular attachment plate and a connection plate. The connection opening is formed in the attachment plate and the pegs are provided on the connection plate.  
           [0016]    Preferably, the connection plate is formed as a square plate, with the bore being formed in the center of the plate, and with the length of a side of the plate corresponding somewhat to the height of a mounting rail. This shape of the connection plate insures that it can be easily secured to the base member in any of four, offset relative to each other by 90°, positions. While, preferably, the angle between the connection and attachment plates is a right angle, it can be arbitrary changed, dependent on the requirements to a particular connection element. For some applications, it may be advantageous to form the connection plate as a circular plate.  
           [0017]    According to the present invention, preferably, the side wall of the base member is formed as a rectangular wall having a width corresponding to a double of a height of an attachable mounting rail and to a double of distance between the side walls. This insures that the connection element can be used for connecting two mounting rails, with the rail openings facing each other or facing away from each other.  
           [0018]    An economic manufacturing is insured when the attachment and base members are formed as stamped bent parts.  
           [0019]    The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to is construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of preferred embodiments, when read with reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0020]    The drawings show:  
         [0021]    [0021]FIG. 1 a perspective view of a connection element according to the present invention;  
         [0022]    [0022]FIG. 2 a perspective view, at an increased scale, of a base member of the connection element shown in FIG. 1;  
         [0023]    [0023]FIG. 3 a perspective view, at an increased scale, of an attachment member of the connection element shown in FIG. 1;  
         [0024]    [0024]FIG. 4 a perspective view, at an increased scale, of the connection element shown in FIG. 1;  
         [0025]    [0025]FIG. 5 a perspective view of the connection element shown in FIG. 4, with the attachment member being pivoted by 90°;  
         [0026]    [0026]FIG. 6 a perspective view is illustrated one of the applications of a connection element according to the present;  
         [0027]    [0027]FIG. 7 a perspective view showing a mounting rail with a plurality of base members of connection element according to the present invention;  
         [0028]    [0028]FIG. 8 a perspective view showing a connection element according to the present invention with a mounting rail passing therethrough;  
         [0029]    [0029]FIG. 9 a perspective view showing mounting of the attachment member of a connection element according to the present invention at an end of a mounting rail;  
         [0030]    [0030]FIG. 10 a perspective view of another embodiment of a connection element according to the present invention;  
         [0031]    [0031]FIG. 11 a perspective view of the connection element shown in FIG. 10, but with the mounting rail being pivoted 90°;  
         [0032]    [0032]FIG. 12 a perspective view illustrating a possible use of the attachment member a connection element according to the present invention; and  
         [0033]    [0033]FIG. 13 a perspective view similar to that of FIG. 12 with two cross-braces. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0034]    A connection element according to the present invention for connecting two mounting rails  1  and  2 , which is shown in FIGS.  1 - 6 , is designated generally with a reference numeral  3 . The connection element  3  has a base member  4  and the attachment member  5 . Each of the connection member  4  and the attachment member  5  has at least one connection opening  6  for attachment of the respective members  4  and  5  to corresponding mounting rails  1  and  2 . The attachment member  5  is releasably connected with the base member  4  by connection means  7 , as it is particularly shown in FIG. 1.  
         [0035]    The connection means  7  includes a plurality of openings  8 , which are provided in one of the members  4  and  5 , and a plurality of pegs  9  which are provided on another of the members  4  and  5  and which cooperate with the opening  8  for connecting the two members  4  and  5  together. The connection means  7  further includes thread means  10  for fixedly securing the base member  4  and the attachment member  5  together.  
         [0036]    In the embodiment shown in FIGS.  1 - 6 , the base member  4  has four openings  8  symmetrically arranged about a bore  11  for a bolt or a screw that forms part of the thread means  10 . The attachment member  5  has four pegs  9  which are symmetrically arranged about a bore  12  and which engage in respective openings  8  as it is shown in FIGS. 4 and 5. The base member  4  has two, extending parallel to each other walls  13  and a bottom or connection wall  14 , forming together a U-shaped profile. Each of the parallel walls  13  and the connection wall  14  has, a one of its free end surfaces, a web  15  and has, at another of its free end surfaces, a pocket  16  complementary to the web  15 . The webs  15  and pockets  16  provide for a formlocking connection of a plurality of a base members  4  with each other, as it is shown in FIG. 6. Each of the walls  13  and  14  has the connection opening  6  and an element of the connection means  7 . The thread means  10  includes a screw with a polygonal head  17 . The screw cooperates with an inner thread  19  provided in the bore  11  for securing the attachment member  5  to the base member  4 .  
         [0037]    The attachment member  5  has an attachment plate  21  and a connection plate  22  extending transverse to the attachment plate  21 . The connection opening  6  is formed in the attachment plate  21 . The pegs  9  of the connection means  7  are provided on the connection plate  22 .  
         [0038]    As it is particularly shown in FIGS. 4 and 5, the base member  4  and the attachment member  5  can be pivoted relative to each other in their non-connected position. In the embodiment of FIGS.  1 - 6 , the base member  4  and the attachment member  5  have four connection positions displaced by 90° to each other. Naturally instead of being attached to the connection wall  14  as it is shown in FIGS.  4 - 5 , the attachment member  5  can be secured to one of the parallel walls  13 . Further, several attachment member  5  can be secured to the base member  4 .  
         [0039]    [0039]FIG. 6 illustrates one of possible applications of a connection element according to the present invention. Each of the mounting rails  1  and  2  has a mounting opening  24  and are so arranged relative to each other that the mounting openings  24  face in opposite directions. Two base members  4  and  20  are formlockingly connected with each other, with the web  15  of the base member  4  engaging in the pocket  16  of the base member  20 . Two attachment members  5  are secured to respective connection walls of the base members  4  and  20  with respective connection means  7 . The attachment members  5  are secured to the mounting rails  1 ,  2  with respective rail nuts (not shown). The bottom  26 ,  27  of the rails  1 ,  2  about each other. To insure an appropriate mounting, the width (t) of the connection wall of the base member  5  should be equal to a double height (h) of the mounting rails  1  and  2  and be twice of the distance (a) between the parallel walls  13  of the base member  4 ,  20 .  
         [0040]    [0040]FIG. 7 shows a plurality of base members  4  secured on a mounting rail  1 . The base members  4  are connected to the mounting rail  1  with respective rail nuts  29 , one of which is shown before being inserted in the mounting opening of the base member  4 .  
         [0041]    For using the connection element according to the present invention with a passing-through rail, two attachment members  31 ,  32  are secured to a mounting rail  30  at a distance from each which corresponds to the width of a base member  34 , as shown in FIG. 8. A further mounting rail  33  extends through the base member  34 . The attachment members  31 ,  32  are secured to the parallel walls of the base member  34  with respective connection means  35 ,  36 .  
         [0042]    [0042]FIG. 9 illustrates another possibility of using an attachment member. In FIG. 9, an attachment member  37  is secured at the end of a mounting rail  38 . The attachment member  37  is secured to the rail  38  with a rail nut (not shown) extendable through the connection openings  39 .  
         [0043]    The parts, which are shown in FIGS.  1 - 9 , are formed of sheet metal as stamped bent parts.  
         [0044]    FIGS.  10 - 13  shown another embodiment of an attachment member and its possible use. The shown attachment member  40  has, contrary to the attachment member  5  shown in FIG. 3, at least one bore  44  with an inner thread  45  and formed in a connection web  41  that connects mutually perpendicular connection plate  42  with attachment plate  43 . The base member  46  connects the attachment member  40  with a mounting rail  47 . The base member  46  has a side wall  48  with a connection opening  49  and a bore  50  with an inner thread  51 . In order to be able to mount a second mounting rail  42  pivoted with respect to the first mounting  47  by 90°, as it is shown in FIG. 11, the side wall  48  of the base member  46  should lie in the same plane in which the connection web  41  of the attachment member  46  lies. At least the second mounting rail  52  has a plurality of elongate openings  53  equidistantly spaced from each other. The openings  53  are formed in the bottom  54  of the second mounting rail  52 . The length of the elongate openings  53  should be so selected that each opening  53  encompasses both bores  44  and  45  formed in the connection web  41  of the attachment member  40  and the side wall  48  of the base member  46 , respectively. For the sake of clarity, the connecting screw means is not shown.  
         [0045]    FIGS.  12 - 13  illustrate a further application of the attachment member  40  as an attachment point for cross-braces designated generally with a reference numeral  61 . The cross-brace  61  has a base plate  63  with two connection brackets  64 ,  65  provided at opposite longitudinal ends of the plate  63 . The connection bracket  64 , which is secured to the attachment member  40 , has a bore  66  for receiving a screw  67 . The opposite bracket  65  has a guide bore  68  for receiving an end of a brace bar  69 . At its receivable end, the brace bar  69  has an engaging peg  70  the diameter of which is slightly larger than the diameter of the bar  69  and which formlockingly engages from behind in the guide bore  68 . For insertion of the peg  70  in the guide bore  68 , the base plate  63  of the brace  61  has an insertion opening  71  interconnected with the guide bore  68 . A cross-brace  61  serves for receiving tension load acting within an installation system formed, e.g., by a plurality of mounting rails, e.g., rails  47  and  52 .  
         [0046]    Though the present invention was shown and described with references to the preferred embodiments, such are merely illustrative of the present invention and are not to be construed as a limitation thereof, and various modifications of the present invention will be apparent to those skilled in the art. It is, therefore, not intended that the present invention be limited to the disclosed embodiments or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.