Abstract:
The invention relates to a locking device at a spagnolet mechanism ( 1 ), anchored in a door or window case ( 39 ), which mechanism comprises a central adjusting mechanism ( 2 ), from which locking rods ( 7 ) originate in mutually opposite directions, the free ends of the locking rods ( 7 ) being anchored in recesses ( 41 ) in a frame ( 40 ), a locking bolt ( 42 ) being responsible for the locking, which is pivotable around a stationary revolving spindle pin ( 44 ) by the locking rods, which locking bolt ( 42 ) via a connection link ( 43 ) with joints adjacent its ends in a locking house ( 16 ) is connected to the associated locking rod. According to the invention the locking bolt ( 42 ) is partially inserted into the locking house ( 16 ) and is anchored there by way of the revolving spindle pin ( 44 ). The locking bolt is connected in an extreme outwardly pivoted position to the connection link ( 43 ) via its first joint ( 45 ) and is pivoted into the locking house jointly with connection link, which in the locking house is connected to its second joint ( 46 ) with the corresponding locking rod end, which jointly with the adjusting mechanism ( 2 ) prevent the locking bolt ( 42 ) from pivoting back to the extreme position. In this way the unity of the coupling is secured.

Description:
[0001]     This application is a national stage completion of PCT/SE2004/000982 filed Jun. 18, 2004 which claims priority from Swedish Application Serial No. 0302392-6 filed Sep. 5, 2003. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The present invention relates to a locking device and is described in detail in the preamble of claim  1 . The invention relates also to a method of assembling such a locking device according to the preamble of the first process claim.  
       BACKGROUND OF THE INVENTION  
       [0003]     Such locking devices are used in spagnolets, the central adjusting mechanism of which e.g. can correspond to the one shown and described in EP 0 932 739.  
         [0004]     The locking rods, which mesh with the frame, have so far often been made in a simple way, i.e. with a straight locking rod end, provided with a covering and meshing in a locking position with a recess in the frame, possibly with a protective plate. However, this locking method has several drawbacks. It is e.g. not very difficult to pry the case and the frame from each other by means of burglary tools within the area of the lock rods and brake open all this unit. The locking rods are straight and offer not much resistance. Also, it is from a construction point of view not very suitable to press very long and/or strong locking rod sections into said recesses. Another drawback is, that the spagnolet mechanisms often are made in several sizes/lengths and for various purposes, i.a. different locking rod lengths being used. Especially because the locking rod ends, which face the frame, preferably will be reinforced as a protection against burglary, it has so far been advantageous to produce complete and finished spagnolet mechanisms in the factory. However, a careful planning is then necessary for large series of windows and doors respectively and a risk-taking with large stocks, since the series may often be changed.  
         [0005]     Spagnolet mechanisms with pivotable locking rods are also known. These mechanisms are also impaired by the above-mentioned drawbacks. The locking rod is mainly straight and can, in addition to a pivoting into said recess, also be removed from it in a straight direction, e.g. when the frame and the case are pried from each other. Also, the last-mentioned mechanisms must be assembled and finished in the factory, a protective plate, which functions as a joining shell and as a mounting base for the various components, being necessary and rendering the construction heavier, expensive materials being necessary, and rendering the whole mechanism more expensive, when it is made, assembled and mounted. The assembling is carried out as follows: Subsequent to the anchoring of the central adjusting mechanism with the locking rods on the shell the locking rods are mounted with mounting holes on a spindle, anchored in the shell and then the link, which in principle is U-shaped, is inserted with its legs into mounting holes in the locking bar and the locking rod end respectively. A U-shaped house is then mounted around this joining and is anchored in the shell through upsetting, which also holds for the spindle ends. Such a joining is not designed or suitable for a loosening, but will, if necessary, be replaced with a complete new spagnolet mechanism, in case parts must be replaced. Any changes afterwards, e.g. choosing shorter or longer locking rods and then also spagnolet mechanisms, is of course impossible.  
       SUMMARY OF THE INVENTION  
       [0006]     The object of the present invention is to counteract and as far as possible eliminate the above-mentioned drawbacks. Also, the invention will contribute to the development of the state of the art in this field in various additional respects.  
         [0007]     These objects will be attained according to the invention by designing a locking device of the type set forth in the introduction, mainly in the way set forth in the characterizing clause of claim  1 . Said objects are also attained by carrying out a method of the type set forth in the introduction, mainly in the way set forth in the characterizing clause of the first process claim. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]     Additional characterizing features and advantages of the invention are set forth in the following description, reference being made to the accompanying drawings, which show a few preferred but not limiting embodiments. The drawings show in detail in:  
         [0009]      FIG. 1 a  sectional planar view of a spagnolet, inserted in a window case and surrounded by a frame, with a locking device according to the invention;  
         [0010]      FIG. 2 a  view from the left in  FIG. 1 ;  
         [0011]      FIG. 3 a  perspective view of a spagnolet with an adjusting mechanism and with locking devices according to the invention;  
         [0012]      FIG. 4 a  planar view of the spagnolet according to  FIG. 3  with an adjusting mechanism, a locking rod, a frame lock and a locking plate according to the invention;  
         [0013]      FIG. 5 a  view from the right of the assembly according to  FIG. 4 ;  
         [0014]      FIG. 6  various views of a modified locking plate according to the invention;  
         [0015]      FIG. 7  various views of a locking bolt according to the invention;  
         [0016]      FIG. 8  various views of a connecting link according to the invention;  
         [0017]      FIG. 9 a  planar view and a side view of a locking rod according to the invention;  
         [0018]      FIG. 10  sequential views of the assembling of a frame lock according to the invention; and  
         [0019]      FIG. 11  various views of a frame lock according to the invention.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0020]     In the drawings a complete spagnolet  1  is shown, which includes a central adjusting mechanism  2 , which includes a shell  3 , comprising a doubly folded plate, between a web  4  and legs  5  of which, with a bulging  6  in one of the legs the inner ends of two in mutual opposite directions projecting locking rods  7  are guided, suitably designed as flat iron rods, and which are provided with a transverse notch  8 , i.e. made in a wide side. In each notch a guide pin  9  meshes, associated with a driver  10 , which with a spindle  11  is mounted in bearing bore  12  in legs  5 . One of the spindles  11  is provided with a square hole  13 , designed to receive a cone-shaped handle spindle (not shown). Thus, by turning the handle spindle one of said driver spindles and the driver itself are turned, which latter by means of a toothing  38  meshes with a matching toothing of second driver  10  and turns it around its spindle  10  in the opposite direction. In this way the two locking rods are simultaneously drawn into and are pushed out of respectively shell  3 , which is provided with through holes  14 , designed to allow a fastening in a door or window case  39 , and a loosening and a locking respectively being obtained via the locking rods and by means of the spagnolet in relation to a frame  40 , which surrounds said case.  
         [0021]     The outer ends of the locking rods meshes each one with its frame lock  15 , which is fastened in a recess  41  close to the frame in said case in its sides, which are facing the frame. The frame lock comprises a housing  16 , made of a strong, bent plate material, roughly having a flat, elongated parallelepipedic shape, i.e. the house, which preferably consists of two symmetrical halves, has two wider main sides  17 , which originate from a web  18 , which extends roughly along half the length of the lock, within one of the narrow long sides  19 , which has a hole  20  along its remaining portion. The other narrow long side  21  has a hole  22  opposite the web and is closed in the form of a bent web tongue  23  opposite hole  20 . Gable side  24 , adjacent web  18 , is completely open, whereas gable side  25  roughly half of it is a hole  26 , adjacent to said web tongues, and closed in the form of an end tongues  27 , bent towards each other, originating from the main sides, as regards the other half of gable side  25 , which preferably is transformed into said narrow long sides, designed as soft bends. Holes  20 ,  22  and  26  are limited by the attached bent portions  18 ,  23  and  27  by means of transverse notches  28 ,  29 ,  30 ,  31  and  32 , which ensures, that the bendings will not affect the adjacent straight sections. Adjacent web  18  and hole  20  respectively the main sides are provided with crosswise through, preferably recessed bores  33  and  34  respectively, designed to receive screws or the like (not shown), anchored in the case. Also, a crosswise through bearing bore  35  is made in the corner area between gable side  24  and web  18 . These three bores are mirror-symmetrically located, allowing the frame lock to be mounted in said recess with either main side  17 . Finally, the main sides of the frame lock are provided with notch embossings  36 , which extend along the length of the greater part of the frame lock and are closed at their ends but are open against the interior of the house and originate from that side of hole  26 , which is adjacent the end tongues. These notch embossings run parallel to the web tongues and are visible from outside in the form of bulgings. They are designed to, with a limited insertion, receive the outer ends of the locking rods, which with their narrow sides are guided in the notch embossings and adjacent the end side are provided with a coupling hole  37 , which runs straight through the sides and may be a round hole.  
         [0022]     The frame lock includes also a locking bar  42  as well as a connecting link  43 . The locking bar is designed to be connected to locking house  16  via a revolving spindle  44  and shares with the link a first joint  45 , whereas the link is designed to, with a second joint  46 , mesh with coupling hole  37  in the corresponding locking rod end. In a preferred embodiment revolving spindle  44  as well as joint  45  are located adjacent locking bar  42  in the form of one-sided spindle pins, which project in opposite directions and of which the one constituting revolving spindle  44  meshes with bearing bore  35 , whereas said first joint  45  of link  43 , mounted within the area of one end of the link, is designed as a bearing hole, running straight through and being designed to be pushed onto said second spindle pin  47  of the locking bar, which is a portion of said first joint. Said second joint  46  of the link, mounted at the second end of the link, is a hook, mounted transversely in relation to said bearing hole and which is designed to mesh with coupling hole  37  of the corresponding locking rod.  
         [0023]     The locking bar preferably has a mainly triangular shape with rounded triangle ends, one triangle end mainly concentrically surrounding said revolving spindle  44 , whereas another triangle end mainly concentrically surrounds the other joint, e.g. the spindle pin mounted on the other main side. Side  65 , which connects said two triangle ends to each other, is fairly straight, whereas the other triangle side  66 , originating from revolving spindle  44 , suitably is bent outwards. The third triangle side includes a preferably U-shaped hook  67 , a claw  60  being formed as a triangle point and a concentric rounding of the locking bar, which extends around the greater portion of the revolving spindle, i.e. about 200°.  
         [0024]     Connecting link  43  can be half the thickness of the locking bar, since there is no risk, that e.g. during a burglary it is subjected to the same large stresses as the locking bar. The basic shape preferably is plate-like and between the two joints the link preferably is goose-necked to form two parts mutually displaced in parallel, joint  46  ending up in the centre plane of the locking bar. The portion with the last-mentioned joint has a hammer-like narrow shape, whereas the other link portion, starting from the other joint, will be continuously wider to optimize the guidance in house  3 , a cavity  68  on the other side of the first joint allowing a pivoting of the link around the outer edge of web  18 .  
         [0025]     An arbitrary locking plate  49  can be used for the locking itself in a frame recess  48 . It will be fastened, with screws (not shown), in the frame wood or the like. However, it is particularly advantageous to use a special locking plate according to the invention, which is shown in  FIGS. 4 and 5 . This locking plate has an enlongated parallelepipedic shape and is made of a strong bent plate. One of gable sides  51  is bevel-shaped jointly with side surfaces  50  and bottom side  69  and holds a hole  53 , suitably recessed from the interior in order to easily insert a screw (not shown), which is inserted through a first locking hole  55  in upper or covering side  52 , which has a locking flange  54 , turned in the direction from the gable side  51  in connection with locking hole  55 , for said locking bar  42 . Upper side  52  has, towards the other gable side  58 , a second locking hole  57 , which ends immediately in front of gable side  58  to form a locking flange  59 , designed to hook up the locking bar with its claw  60  in an alternative locking position. These two locking positions may be called a closing position and a ventilation position. In both positions the case and the frame cannot be pried open, since claw  60  from the rear or from the interior acts on the respective locking flange of the locking plate. Hole  57  is made by punching out material from the upper side and bending it to obtain an oblique fastening tongue  61 , which is mainly parallel with the gable side and is provided with a suitably bevelled screw hole  62 . The tongue is connected to the upper side on the side, which faces away from locking flange  59 . A screw, not shown, is inserted into hole  57  and through screw hole  62  as well as through an e.g. oval hole  64  in the bottom side. In this way the locking plate will be fastened in the frame in a reliable way, entirely without visible screws and without screws accessible in a lateral direction. The upper side suitably will project laterally above the side surfaces and gable side  58  with a cover flange  56 , in which holes, if necessary, for additional fastening screws can be made.  
         [0026]     It is shown in  FIG. 10 , that on each side of the adjusting mechanism four parts are to be assembled as a unit, i.e. a locking rod, a frame locking house, a locking bar and a link. The locking bar and the link are initially joined to each other, according to  FIG. 10   b.  The locking bar is then inserted into the house, the width of which is larger than the transverse extension of the locking bar and the lip of the revolving spindle but is smaller than the total transverse extension of the locking bar and the two spindle pins, which constitute the revolving spindle and the first joint for the link. This means, that only the unit, which comprises the locking bar and the link, can be inserted into the house, provided the link as a whole will stay outside the house. As soon as, according to  FIG. 10   c,  said unit has been inserted into the house, the locking bar will be displaced in a lateral direction, according to  FIG. 10   d,  the spindle pin then meshing with the bore in the house, designed for his purpose. Also, said locking rod with its coupling end will be pushed forward and up to the stop and into the notch embossings. Then the link, according to  FIG. 10   e,  can be swung into the house, since the lateral displacement, mentioned above, has made room for the locking bar and also the pin for the first joint of the link. The link is then swung into the house completely, until its second joint is fastened in the hole of the guide hole. The locking rod is removed from the house again, according to  FIG. 10   f,  the locking bar and the link following the locking rod and finally being completely withdrawn into the house. A joining, obtained in this way, can be secured by fastening a friction lock, e.g. designed as a simple U-shaped clip  63 , to the locking rod adjacent the house, in order to prevent the locking rod from being pushed inwards again. When subsequently the spagnolet is inserted into a groove in the frame, then the friction lock suitably automatically engages the material, which surrounds the groove and is removed in this way. It is shown in  FIGS. 10   a - e,  that the locking bar during the entire assembling process is in an end position, where the locking bar has been swung out of the house beyond the locking position, referred to, in relation to the locking plate. It is solely in this end position possible to let the link swing into and out of the house, due to the length and the position of the link in relation to the web tongues, In case the locking bar and then also the link is swung just slightly into the house, then the second end of the link ends up below the web tongues and is secured in this way against a swinging out-movement. Also in a transverse direction the locking bar and the link are secured in the house, because the inner width of the house is smaller than the total thickness of the locking bar and the two spindle pins, which project in different directions. In case it is necessary to replace a part, connected to the frame locking house, the fastening screws for the house in the frame have to be removed first and then an excessive turning can be done and the link and then the locking bar and the locking rods can be removed.  
         [0027]     Whereas the insertion end of the locking rods in the adjusting mechanism suitably is finished by the manufacturer, their frame locking ends suitably can be cut by a user, e.g. a window factory, to a suitable length and be provided with link holes. In this way a user can buy a large amount of spagnolets with e.g. a maximum length and then be able to quickly and conveniently make them shorter according to the actual need the user has.  
         [0028]     The invention is not limited to the embodiments described above and shown in the drawings but can be modified and supplemented in an arbitrary manner within the scope of the inventive idea and set forth in the following claims. Thus, house  16  and the other parts can of course be made according to other techniques and/or with other materials, e.g. plastic materials. The locking rods can, where appropriate, be combined with locking means, known per se, mounted along the length of the locking rods and implementing them in a lateral direction between two cases respectively. The locking bar and the link can be united, e.g. by riveting, before the mounting in the house. The locking bar can also, instead of its own stationary spindle, be provided with a straight through bore, into which a pin or the like is inserted straight through the house, to be used as a revolving spindle.