A METHOD AND DEVICE FOR MOUNTING DOOR AND WINDOW FRAMES AND FRAME FITTINGS

Abstract: The invention relates to a method and to a fastening device for reducting the number of fasteners and working steps required to mount door and window frames and to secure fittings to the frames. Accordingly, there is used in accordance with the invention a fastening device (1) comprising an externally screwthreaded sleeve (2) which has provided on one end thereof an external flange (3) by means of which a fitting in the form of a hinge (11) striking plate or the like can be securely fitted to a frame (8), which frame (8), in turn, can be secured in an opening in a building element (9) with the aid of a screw (7) which passes through and co-acts with the fastening device, the head (6) or like element of the screw being locked to the fastening device (1) so that the fastening device, and therewith the frame (8), will accompany axial movement of the screw (7) when screwing-in or screwing-off the screw from the side of an opening in the building structure (9).

Description: A method and device for mounting door and window frames and frame fittings TECHNICAL FIELD The present invention relates to a method and a to a faste¬ ning device for reducing the number of fasteners and work¬ ing steps required to mount door and window frames in their respective wall openings and to secure respective fittings to said frames. BACKGROUND PRIOR ART Devices for mounting door frames and window frames in wall openings and for making positional adjustments to the frames are known to the art, such devices being referred to as frame screws. One of the earliest known frame fastening devices, and also the one most used, comprises an exter¬ nally screwthreaded sleeve which is screwed into a through- passing hole in the frame to be mounted. The frame is then drawn firmly against the inner surface of the wall opening, with the aid of a screw inserted into the sleeve. The screw is prevented from being displaced axially in relation to the sleeve in some known manner, e.g. with the aid of a locking ring fitted into a groove, or by projections formed on the sleeve, or by corresponding means. As the sleeve is screwed into -the aforesaid hole, the threads on the sleeve bite into the frame and therewith enable the position of the frame to be subsequently adjusted. This adjustment is made with the aid of a suitable tool inserted in the hole in said frame, and it is possible to make positional adjustments after fitting the reveals, architraving and like dressings of window and door structures. In the case of another type of frame adjusting device, the head of the fastening screw is held locked in a hole which passes through the frame and the diameter of which is adap- ted to the actual screw itself. This hole may also be countersunk, with the diameter of the countersunk portion being adapted to the size of the screw head, so as to form a seat on which the head can rest. The screw head is locked firmly in the hole by means of a metal securing tab. This locking of the screw head enables the position of the frame to be adjusted, by simply tightening or backing-off the screw, since the frame is forced to follow the axial move¬ ment of the screw irrespective of whether the screw is tur- ned deeper into the side of the wall opening or backed-off therefrom. It is a general tendency within the building industry to carry out as much as possible of the constructional work involved in the factory itself, instead of on the construc¬ tion or building site, i.e. to prefabricate as many as possible of the structural elements involved, which in the case of window frames and door frames implies that the latter shall preferably have fitted thereto all the neces- sary frame screws, hinges and striking plates when leaving the manufacturer. With regard to the known frame screws, the type of frame screw first described is not fitted toge¬ ther with the fastener screw until the frame is mounted in its intended wall opening, -whereas certain securing devices of the kind of adjustment device last described can be placed in-the -frame durin -its manufacture. The metal tabs which are intended -tf-Lock the screw head to -the-frame sub¬ sequent to fitting the frame are normally too weak to lock the head efficiently in the case of heavy doors, and conse- quently such tabs are used infrequently with prefabricated frames. In the endeavour to optimize prefabrication, striking plates and hinges are also fitted to the frames in the factory, this pre-fitting of the hinges being made possible by the fact that present day hinges are divisible, i.e. consist of readily separated parts and, similar to the door lock, are placed symmetrically in relation to the horizon¬ tal centre line of the door, so that the same fitting can be used for both right-hung and left-hung doors. SUMMARY OF THE INVENTION The object of the invention is to provide a method and a door or window frame fastening device which will reduce the number of fasteners and working steps required to mount a frame in its respective opening and to attach the frame fittings thereto, and which will also permit fasteners and fittings to be mounted on the frames by the manufacturer with the aid of a fastening device which is sufficiently stable and robust to function efficiently in the types of door most frequently used today. This object is achieved by means of the invention with the aid of a fastening device which in addition to functioning as a frame screw can also be used, at the same time, to fasten fittings to door or window frames. The invention is characterized by the featu- res set forth in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to an exemplifying embodiment thereof illustrated in the-accompanying drawings, in which Figure 1 illustrates the fastening device in side view and in section; Figure 2 is a sectioned view of a fastening device mounted in a door frame arranged in a wall opening, said device also serving to secure a door hinge to the frame; and Figure 3 is a plan view of the frame and door illustrated in Figure 2. DESCRIPTION OF A PREFERRED EMBODIMENT Shown in Fig. 1 is a fastening device 1 which comprises an externally screwthreaded sleeve 2 having located at one end thereof a flange 3 and at the other end thereof a constric¬ ted portion which forms a seat for co-action with a screw head or like element. Located above the seat are stop means 5 which are intended to engage behind the head 6 or like element of a screw 7 co-acting with the fastening device, in the manner illustrated in Fig. 2. This figure illustrates in section part of a door frame which is moun¬ ted in an opening in a wall 9 with the aid of the fastening device 1 and a screw 7 co-acting therewith, the head 6 of said screw having the form of a flange 6 and an outwardly located hexagonal end part 10. One half 11 of a hinge is anchored to the frame 8 of a door 13 by means of the flange 3 on the fastening device, said flange holding the hinge half in clamping abutment with the bottom of a milled recess in the frame 8, said recess being configured to receive said hinge half. The door 13 is only partially illustrated, also in section. The frame 8 and door 13 of Fig. 2 are shown in plan in Fig. 3, together with the hinge 11, 12 joining the frame and door together. As will be seen from the figure, the inner surface 15 of the illustrated screwthreaded sleeve 2 is hexagonal in shape, and the sleeve 2 will therefore be tightened with the aid of an Allen-key. When studying Fig. 3, a comparison between the hinge halves 11 and 12 will * show that ,by securing the. inge half 11 to the frame 8 in the aforedescribed manner it has been possible to save three screws 1 and to obviate the need to insert and tigh- ten three further screws. As will be understood from the aforegoing, the inventive fastening device is configured in a manner which enables it to be placed in a throughpassing hole in the frame during manufacture of said frame, and is therewith able to func ¬ tion as a means for securing hinges, striking plates or the like in addition to its function of securing the frame and enabling subsequent adjustments to be made thereto in co-action with a securing screw. When mounting a frame in a wall opening or in the opening of some other building structure, only one hole need be drilled in the opening walls for the ~ screws co-acting with the fastening device, subsequent to the frame having been positioned in a known manner with the aid of wedges, said holes, when necessary, being plugged. The fastening devices serve as guides for the drill used to drill said holes. Subsequent to having drilled the aforesaid holes, the frame is secured by screw¬ ing the screws co-acting with the fastening devices into the drilled holes. When the screws are tightened into abut¬ ment with their respective seats , the stop means 5 spring to one side and grip behind the screw head 6 or their corresponding elements. The fastening device necessarily consists of an elastic material, suitably a reinforced plastics material, as with the illustrated embodiment. The fastening device may have a configuration different to that illustrated without departing from the inventive con¬ cept. For example, the fastening device may be made of a non-elastic material and the resilient stop means replaced by a resilient annυlυs or the like which is pressed into a groove located internally of the sleeve 2, subsequent to having tightened the screw 7 co-acting with the fastening device.

Claims: CLAIMS 1. A method for reducing the number of fastening devices and working steps required when mounting door and window frames and securing respective fittings thereto, characte¬ rized in that for the purpose of securing said fittings there is used an externally screwthreaded sleeve (2) having located on one end thereof an external flange (3) and the inner surface (15) or outer flange surface thereof is con¬ figured for co-action with a twist tool or the like, which sleeve (2), when securing a frame fitting (11) to said frame, is screwed into a hole provided in the frame (8) and adapted to the screwthread, through a hole in said fitting (11), in a manner such as to bring the fitting (11) into securing abutment with the frame, whereafter, for the pur¬ pose of making necessary positional adjustments to the frame (8) in the opening of a building structure (9), a screw (7) extending through the sleeve (2) is screwed into the opening wall until the screw head or corresponding ele¬ ment (6) bears against a seating (4) provided in the sleeve (2), at least one stop means (5) provided in the sleeve (2) being caused to engage behind the head of the screw or like element (6) such as to prevent axial displacement of the screw (7) in relation to the sleeve (2) , the arrangement being such that when the screw (7) is screwed into the ope¬ ning wall (9) or backed-off therefrom, the sleeve (2), and therewith the frame (8), are forced to accompany the axial movement of the screw head (6), thereby enabling positional adjustments of the frame (-8) relative to the opening wall (9) to be made. 2. A fastening device (1) for carrying out the method according to Claim 1, characterized in that the fastening device comprises an externally screwthreaded sleeve (2) having located on one end thereof an external flange (3) and the inner diameter (15) or outer flange surface of which sleeve is configured for co-action with a twist tool or the like; in that the sleeve (2) has provided internally at its other end a seat (H) which is intended for co-action with a screw head (6) or like screw element; and in that arranged or capable of being arranged above the seat (H) is at least one stop means (5) for preventing axial movement of a screw (7) relative to the sleeve (2), the head (6) or like element or said screw being brought into abutment with the seat (H) .

Inventors: ALBERTSSON CHRISTER, SUNDSTROEM INGE, ALBERTSSON, CHRISTER, SUNDSTROEM, INGE
Applicants: THORSMAN & CO AB
Application year: 1988
Main classification: E06B1
IPC codes: E05D5, E06B1, F16B5