The present invention relates to a transmission rod for accessories for windows and doors.
Accessories for windows and doors are divided in two large categories, according to the material constituting the window or door: accessories for wooden or PVC windows and doors and accessories for aluminium windows or doors. The main difference is due to the fact that aluminium windows and doors have grooves with considerably greater structural capacities than those of the grooves of wood or PVC windows and doors. Consequently, whilst accessories for wood and PVC windows and doors must be provided with a support and guide structure with a structural function, accessories for aluminium windows and doors exploit the structural capacity of the guides of the window or door.
In the field of accessories for aluminium windows and doors, transmission rods are used which connect the various accessories of the window or door to each other. In particular, in the case of windows that can rotate both about a vertical axis and about a horizontal axis, transmission rods are provided for connecting the opening/closing device to an upper angular transmission and to a lower angular transmission. Also provided is a transmission rod for connecting the upper angular transmission to a scissors arm and a transmission rod connected to the lower angular transmission. An additional rod, connected to an angular transmission for supplementary closure, can also be provided.
Each transmission rod is provided at it ends with connecting means. For example, such connecting means can be formed by holes able to engage pivot pins provided on the accessories.
The length of the transmission rods depends on the dimensions of the window or door and on the position of the opening and closing device. In more traditional solutions, transmission rods are obtained starting from a continuous strip of metallic or plastic material wherefrom are cut segments with the desired length. After the cut, in each transmission rod are formed connecting holes at the two ends by punching or drilling. The cut to measure and the punching or drilling of the transmission rods are performed by the manufacturer of the windows or doors. Said operations are time consuming for the manufacturer and require dedicated machines.
The document EP-A-1 227 207 describes accessories for windows comprising a support piece connected at its ends to a pair of transmission rods. The support piece is connected to each transmission rod by means of mutually engaged toothed parts, i.e. a toothed part at the end of the transmission rod and a toothed part at the end of the support piece. The toothed coupling between the support piece and the transmission rod, however, allows a relatively reduced amplitude adjustment, so the window and door manufacturer must have available an assortment of rods with different lengths to cover all production requirements.
The object of the present invention is to provide a transmission rod for accessories for aluminium windows and doors which allows to overcome the drawbacks of the prior art.
According to the present invention, said object is achieved by a transmission rod having the characteristics set out in the claims.
The present invention shall now be described in detail with reference to the accompanying drawings, provided purely by way of non limiting example, in which:
With reference to
The accessories 18, 20, 22 and 26 are operatively associated to a plurality of transmission rods 28 according to the present invention.
With reference to
The telescopic connection between the elongated elements 30, 32 allows to adjust the distance between the fastening means 38, 40 between a minimum value and a maximum value. The distance between the fastening means 38, 40 constitutes the effective length of the transmission rod 28. The two elongated elements 30, 32 are destined to be fastened to each other in a selected position, whereto corresponds a desired effective length.
The elongated elements 30, 32 are preferably constituted by injection moulded plastic material. The elongated elements 30, 32 are provided with mutually co-operating guiding means, which achieve the telescopic connection. A possible embodiment of said guiding means is illustrated with reference to
The elongated elements 30, 32 are provided with a lock system able to fasten said elements to each other in a predetermined position whereto corresponds the desired effective length of the transmission rod 28.
The locking system for the relative fastening between the elements 30, 32 can assume various forms. A preferred embodiment of the locking system is described below with reference to
The first elongated element 30 is provided with a through opening 62 situated at the opposite end relative to the end portion 34 bearing the fastening means 38. The through opening 62 receives a locking member 64 provided on two opposite sides with teeth 66 able to engage the teeth 60 of the second elongated element 32. Preferably, the locking member 64 is inserted in snap-on fashion into the opening 62, by means of the edges of the opening 62. As shown in
In use, the manufacturer of windows or doors sets the desired effective length of the transmission rod 28 making the two elongated elements 30, 32 slide relative to each other. When the effective length of the transmission rod 28 corresponds to the desired length, the rod 28 is locked by the insertion of the locking member 64 into the opening 62. To vary the length of the transmission rod 28, it is necessary to extract the locking member 64.
Number | Date | Country | Kind |
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TO2003A0488 | Jun 2003 | IT | national |
Number | Name | Date | Kind |
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4679352 | Bates | Jul 1987 | A |
4684140 | Olivieri | Aug 1987 | A |
4739583 | Tonsmann et al. | Apr 1988 | A |
5226256 | Fries et al. | Jul 1993 | A |
5881498 | Goggin et al. | Mar 1999 | A |
Number | Date | Country | |
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20050022941 A1 | Feb 2005 | US |