Fastening device for door or window frames

A device for adjustably fastening a door or window frame or the like to a fixed element, including a screw-like device having threads which engage the fixed element and a threaded sleeve member, displaceably arranged on the screw-like device, which engages the frame.

This invention relates to a device for the adjustable fastening of door or 
window frames or the like to fixed elements, including a screw means 
provided with threads for engagement with the fixed element and a 
sleeve-shaped part provided with threads for engaging with the frame part. 
BACKGROUND ART 
Devices of the type mentioned are already known, e.g. from Swedish Pat. No. 
216.085 and U.S. Pat. No. 4,486,134. By these known fastening devices the 
sleeve and screw means can be turned together with the aid of a tool, so 
that the sleeve will penetrate into the frame and the screw means into the 
fixed element, and the sleeve (Swedish Pat. No. 216 085) or the screw 
means (U.S. Pat. No. 4,486,134) can also be turned itself with the aid of 
another tool for adjusting the position of the frame in relation to the 
fixed element. 
These known devices enable a desired adjustment but necessitate the 
employment of two different tools, i.a. one tool for applying the device 
and another tool for carrying out the adjustment. Moreover both these 
known devices require the employment of one specifically designed tool 
without which the device cannot be applied. For the device according to 
Swedish Pat. No. 216 085 a specifically designed tool is also required for 
carrying out the adjustment. This is a clear disadvantage since it not 
only necessitates the formation of engagement surfaces for two different 
tools by the manufacture of the device, but also makes it impossible to 
apply and adjust the device with the aid of ordinary tools normally used 
by craftsmen. Moreover the necessity to emply two different tools 
naturally also renders the application and adjustment of the device more 
cumbersome and thus expensive. 
DISCLOSURE OF INVENTION 
The object of the invention is to provide a fastening device of simple 
construction which furthermore only necessitates the use of one 
conventional tool, such as a screw-driver. This is provided by the 
sleeve-shaped part being arranged axially displaceable on the screw means 
and by the screw head and the sleeve being provided with mating engagement 
means so that in a first position the sleeve engages the screw means to 
accompany the screw means in its turning movement, while in its second 
position it does not accompany the turning movement of the screw means.

BEST MODE FOR CARRYING OUT THE INVENTION 
The inventive fastening device is illustrated in FIG. 1 in a partially 
sectioned side view. A screw means is denoted by the numeral 1 and is 
provided with a thread portion 2 for screwing into a fixed element 3, with 
a screw head 4 and with a smooth cylindrical portion 5 between the screw 
head and shoulder 6. On the smooth part 5 there is arranged a sleeve 7 
provided with a thread 8, which can be displaced between the shoulder 6 
and the screw head 4. The shoulder 6 on screw means 1 only acts as a stop 
for the downward movement of the sleeve 7 and its specific shape is not of 
vital importance. Thus the shoulder is only illustrated very schematically 
in the drawings and in practice it could be given any suitable shape, i.e. 
depending upon by which method it is formed, other than the illustrated 
sharp-edge shape. The sleeve 7 and the head 4 are implemented at their 
contiguous surfaces such that when the screw head is turned in one 
direction, e.g. clockwise, the sleeve is taken with it, whereas if it is 
turned in the opposite direction the sleeve 7 and head 4 glide against 
each other. According to one embodiment illustrated in FIG. 1, the sleeve 
7 is provided with recesses 9 on its end facing towards the screw head 4. 
These recesses 9 are engaged by projections 10 on the screw head and are 
formed such that on turning the screw head in one direction, e.g. 
clockwise, the sleeve accompanies the head, while on turning in the other 
direction the edge 11 of the projection 10 glides along the sloping 
surface 12 of the recess so that the head 4 is lifted out of engagement 
with the sleeve part, and the screw means 1 can be turned without the 
sleeve 7 accompanying it. It is, however, just as possible to have the 
screw head provided with recesses 9' and the sleeve with projections 10' 
having sloping defining surfaces. (FIG. 3) 
The frame 13 is pre-bored to a suitable diameter for allowing the sleeve 7 
to be driven into the hole with its thread 8 engaging the frame 13. The 
screw means 1 is first inserted through the hole in the frame 13 and is 
then screwed into the fixed element 3 which need not be pre-bored. On 
continued driving of the screw head the sleeve 7 is driven into the 
pre-bored hole in the frame. When the screw means has been driven in to a 
depth such that the frame is approximately in the desired position, 
adjustment takes place by the screw head 4 being turned anticlockwise. The 
sleeve 7 then does not accompany the screw means 1, but the latter is 
screwed out until the frame 13 has reached the desired distance from the 
fixed element. At the places where the distance between the frame and the 
fixed element is too great, the screw means is driven deeper into the 
fixed element.