WO2004083577A1

WO2004083577A1 - Telescopic window brace

Info

Publication number: WO2004083577A1
Application number: PCT/CZ2004/000014
Authority: WO
Inventors: Lubos DVORÁK
Original assignee: Tokoz A.S.
Priority date: 2003-03-18
Filing date: 2004-03-11
Publication date: 2004-09-30
Also published as: PL1604087T3; EP1604087A1; CZ293782B6; EP1604087B1; CZ2003771A3

Abstract

Telescopic window brace consisting of a pair of profiles (1,2) whose section resembles a narrow character U that are inserted into each other in the opposite direction, the first profile (1) having an outer web (8) and an inner web (3) that is provided with the first longitudinal groove (4) for the rivet connection (9) with the other profile (2), and a through hole (11) opening to the side edge of the inner web (3) accommodating a tilting pawl (14) meshing with the through notches (22, 23, 24, 26) created in the bent part (25) of the second profile (2) having an outer web (10) and an inner web (5) with the second longitudinal groove (6) for the rivet connection (7) with the first profile (1).

Description

Telescopic window brace

Field of technology

The invention relates to a telescopic window brace comprising two elements that can be shifted into each other and a securing element.

Description of the related art

Window braces known to the present day are usually conceived as shear mechanisms consisting of two arms connected by joint, of which one is accommodated as tilting on the window frame, the other as tilting on the window wing. For the purpose of securing the window wing in the desirable open position the shear mechanism, such as according to the disclosed application DE 34 46 035, requires yet another device, such as a pull rod with tilting motion fixed to one arm, the free end of said pull rod being provided by a tilting sleeve that can slide on the other arm that is provided by notches for snapping said tilting sleeve.

According to the disclosed application DE 199 25 450 the shear mechanism is complemented with a third arm tilting on the arm that tilts on the window frame, having a joint connection with the other arm tilting on the window wing. Such third arm is provided with a profile groove accepting a pin anchored on the second arm and intended for securing the window wing in positions preselected.

The above solutions are rather simple, however, their strength is low, especially if they are used for large window wings having considerable mass.

Another drawback of such known shear mechanisms consists in that they substantially limit lateral access to the glass pane to be cleaned, the shear arms remaining in diagonal position also if the window wing is fully open.

Also concepts of window braces based upon the telescopic principle are known, such as according of the disclosed application DE 43 41 353 where the window brace consists of a pair of flat pull rods adjacent to each other, one of said flat pull rods pivoting on the window frame and the other flat pull rod pivoting on the window wing. Both flat pull rods are provided, almost full length, by waved guiding grooves with a system of lateral recesses for allowing to accommodate pins anchored in the opposite flat pull rod at its opposite end.

The disadvantage of this solution, again, resides in its relative low strength, especially if used for rather large and massive window wings, and also the lateral access to the glass for cleaning is restricted.

Another design of window brace on telescopic principle is known from the patent DE 40 16 757 according to which the window wing is provided with a pivoted guiding pull rod made of a profile with section of square character C accommodating a flat pull rod pivoting on the window frame sliding in the former pull rod. The free end of the guiding pull rod is provided with a brake having an adjustable stop for restricting the movement of the flat pull rod in the guide pull rod.

A disadvantage of the said solution, on the one hand, is the unreliable operation of the brake that is subject to weather conditions resulting in varied friction of the flat pull rod and, on the other hand, the construction thickness tends to be considerable, usually exceeding the current gap of the window structure. Also another telescopic window brace is known according to EP 0 553 523 created by an external hollow beam accommodating a sliding internal hollow beam. The free end of the external hollow beam pivots on the window wing and the free end of the internal hollow beam pivots on the window frame. Both hollow beams are provided with through grooves allowing the insertion of a resiliently tilting stop accommodated in the internal hollow beam. The resiliently tilting stop is arranged so at to mesh with the ends of both through grooves for ensuring the overall length of the telescopic brace, and thus the corresponding size of opening of the window wing. For adjusting the length of the telescopic window brace the external hollow beam has a toothed belt attached at the internal side, whereas the internal hollow beam has a resilient locking pawl meshing with the toothed belt and actuated by the resiliently tilting stop.

The disadvantage of this solution is seen in its considerable manufacturing complexity considering the parts accommodated in the inside of the hollow beams, as well as the necessity of providing two control springs. Yet another disadvantage is the relatively large section of the outer hollow beam that usually exceeds the size of the gap between the window frame and the window wing. This causes complications during the installation, such as additional cost of various amendments.

Summary of the invention The purpose of the invention is to do away with the mentioned disadvantages of the known concepts of window braces by creating a telescopic window brace of simpler construction providing sufficient strength also if used for larger size windows and requiring no or minor adaptations of the window frame and the window wing in the course of installation.

This task is fulfilled and the mentioned disadvantages are removed by a telescopic window brace comprising two elements shifting into each other and a securing element according to the present invention characterized in that it consists of a pair of profiles whose section resembles a narrow character U that are inserted into each other in the opposite direction, the first profile having an outer web and an inner web that is provided with the first longitudinal groove for the rivet connection with the other profile, and a through hole opening to the side edge of the inner web accommodating a tilting pawl meshing with the through notches created in the bent part of the second profile having an outer web and an inner web with the second longitudinal groove for the rivet connection with the first profile. In a preferable embodiment of the invention the tilting pawl is created by a flat body provided with a hook nose at one end, for engaging with the first protrusion in the through hole, and the opposite end with a stop jut for engaging with the second protrusion in the through hole, the tilting pawl having a one-sided level to form a skew stop above its central part, while it is under the action of a pressure spring in the direction towards the bent part.

It is further preferable, if there is a frame clip inserted and fixed into the end part of the first profile for pivoted anchoring of the telescopic window brace to the window frame, and if there is a wing clip inserted and fixed to the end part of the second profile for pivoted anchoring of the telescopic window brace to the window wing.

The window clip can be provided with a circular hole with narrowing down extension and a flat resilient security element that partially covers the circular hole, being intended for securing the telescopic window brace against releasing from the window wing.

The benefit of the telescopic window brace according to the invention resides in considerable design simplification along with sufficient strength even for the use in larger size windows, its installation requiring none at all, or only minor adaptations of the window frame and the window wing.

Review of figures in the drawings An exemplifying embodiment of the invention is illustrated in the drawing wherein Fig. 1 is the overall front view of the telescopic window brace, Fig. 2 a longitudinal vertical section of the telescopic window brace according to line II - II in Fig. 4, Fig. 3 a ground plan view of the telescopic window brace, and Fig. 4 a cross section of the telescopic window brace according to the line IV - IV in Fig. 1.

Examples of embodiment of the invention

The telescopic window brace consists of a pair of profiles I, 2 in form of a narrow character U that are inserted into each other in the opposite direction. The first profile 1 has a first longitudinal groove 4 in its inner web 3 and the second profile 2 has a second longitudinal groove 6 in its inner web 5. Both longitudinal grooves 4, 6 are adjacent to each other, if both profiles 1, 2 are inserted into each other. Close to its one end the first profile i is provided with a rivet connection 7 firmly accommodated in the outer web 8 and the inner web 3 and passing through the second longitudinal through groove 6 in the inner web 5 in the second profile 2. Thus the rivet connection 7 serves to guide the second profile 2 in the first profile L Similarly, close to its opposite end, the second profile 2 is provided with another rivet connection 9 firmly attached to the outer web 10 and the inner web 5 of the second profile 2, passing through the first longitudinal groove 4 in the inner web 3 of the first profile I. Thus the rivet connection 9 serves to guide the first profile I in the second profile 2. Both rivet connections 7, 9 serve at the same time as end stops when the telescopically arranged profiles I, 2 are extended to the maximum.

Close to the rivet connection 7 the inner web 3 of the first profile I has a through hole lj_ opening to the marginal edge of inner web 3 and provided, at this marginal edge, with a pair of protrusions 12, 13 that are offset from each other for holding the tilting pawl 1_4 inserted in the through hole I L, said tilting pawl being under the action of a pressure spring 15 acting towards the said protrusions, the other end of said spring 15 being inserted in the recess 16 of the internal edge 17 of the through hole 11. The tilting pawl 14 is created by a flat body 1_8 the one end of which has a hook nose 19 for engaging with the first protrusion 12 in the through hole 1_1 and at the opposite end a stop jut 20 for engaging with the second protrusion 13 in the through hole H. The flat body 1_8 of tilting pawl 14 has a one-sided bevel above its central part, thus creating a skew stop 21 for engaging with always one of the through notches 21, 22, 23, 24, or possibly further ones that are provided in the bent part 25 of the second profile 2. Their number and spacings depend upon the requirements relating to the opening of the not illustrated window wing. For locking the window wing in the position for being cleaned the opposite end of the second profile 2 has a through notch 26 at the end of the bent part 25. At the level of the skew stop 21 the inner web 8 of the first profile 1 is provided with a crosswise recess 27 up to the height of the inner web 3 of the first profile 1 for easy actuating of the skew stop 21 with one finger of the hand. The end part of first profile 1 bears an inserted frame clip 29 that is fixed, for instance by rivets 28, as a tilting anchor of the telescopic window brace to the not illustrated window frame, and the end part of the second profile 2 bears a wing clip 31 that is fixed, for instance by further rivets 30, and has a resilient flat security element 32 that partially covers the circular hole 33 with tapered extension 34 for easy installation and removal from the not illustrated pin fixed to the window wing.

The telescopic window brace according to the present invention will be installed to the window gap by its frame clip 29 to the inner side of the not illustrated window frame, such as by a current screw connection, and by its wing clip 31 to the outer side of the not illustrated window wing, such as by inserting the wing clip 31 by positioning its circular hole 33 onto the not illustrated pin attached to this outer side of the window wing. By shifting the window clip 31 the not illustrated pin will enter the tapered extension 34 of the circular hole 33 where the flat security element 32 will ensure the telescopic window brace against release.

After turning the current window handle the window wing will be released and can be tilted to a partially open position in which the second profile 2 will be pulled from the first profile 1, until the tilting pawl 14 accommodated in the through hole H of the inner web 3 of the first profile 1 and held by the bent part 25 of the second profile 2 when the window is closed, is now shifted out, gets released and snaps under the action of pressure spring 1_5 with its skew stop 2_1 into the first through notch 22 in the second profile 2. Thus the window wing gets locked in the first slightly opened position.

If the window wing is required to open more, the skew stop 21 will be pushed by a finger of a hand against the strength of pressure spring 15, which is allowed by the cross recess 27 in the outer web 8 of the first profile 1. Thus the skew stop 2_1 leaves the engagement with the first through notch 22 and the second profile 2 is released. By the tilting movement of the window wing the second profile 2 moves further out of the first profile I, until the skew stop 21 of the tilting pawl 14 snaps under the action of the pressure spring 1_5 into the second through notch 22 in the second profile 2. Thus the window wing gets locked in the second partially open position. In an analogous procedure the window wing can be locked in the third, or possibly in further positions as well as in the so- called cleaning position in which, after the tilting pawl 14 is released, the second profile 2 can be shifted out of the first profile 1, until the skew stop 21 of tilting pawl H snaps under the action of pressure spring 15 into the terminal through notch 22 in the second profile 2. The closing of the window wing is performed by simple pressure upon the same and is achieved continuously, which is allowed by the angle of the skew stop 21 that can smoothly slide under the bent part 25 of the second profile 2 during the retracting movement of the second profile 2 back into the first profile I.

Industrial applicability

The telescopic window brace can be used for securing window wings in various opening positions, including the position for cleaning.

List of reference numbers

1 first profile

2 second profile

3 inner web

4 first longitudinal groove

5 inner web

6 second longitudinal groove

7 rivet connection

8 outer web

9 rivet connection

10 outer web

11 through hole

12 first protrusion

13 second protrusion

14 tilting pawl

15 pressure spring

16 recess

17 inner edge

18 flat body

19 hooked nose

20 stop jut

21 skew stop

22 first through notch

23 second through notch

24 third through notch

25 bent part

26 terminal through notch

27 cross recess

28 rivet

29 frame clip

30 rivet

31 wing clip

32 flat security element

33 circular hole

34 tapered down extension

Claims

1. Telescopic window brace comprising two elements that can be shifted into each other and a securing element, characterized in t h a t it consists of a pair of profiles (1,2) whose section resembles a narrow character U that are inserted into each other in the opposite direction, the first profile (1) having an outer web (8) and an inner web (3) that is provided with the first longitudinal groove (4) for the rivet connection (9) with the other profile (2), and a through hole (11) opening to the side edge of the inner web (3) accommodating a tilting pawl (14) meshing with the through notches (22, 23, 24, 26) created in the bent part (25) of the second profile (2) having an outer web (10) and an inner web (5) with the second longitudinal groove (6) for the rivet connection (7) with the first profile (1).

2. Telescopic window brace according to claim 1, characterized in th t the tilting pawl (14) is created by a flat body (18) provided with a hook protrusion (19) at one end, for engaging with the first protrusion (12) in the through hole (11), and the opposite end with a stop jut (20) for engaging with the second protrusion (13) in the through hole (11), the tilting pawl (14) having a one-sided bevel to form a skew stop (21) above its central part, while it is under the action of a pressure spring (15) in the direction towards the bent part (25).

3. Telescopic window brace according to claim 1, characterized in that a frame clip (29) inserted and fixed into the end part of the first profile (1) for pivoted anchoring of the telescopic window brace to the window frame, and if there is a wing clip (31) inserted and fixed to the end part of the second profile (2) for pivoted anchoring of the telescopic window brace to the window wing. Telescopic window brace according to claims 1 and 3, characterized in that the window clip (31) can be provided with a circular hole (33) with narrowing down extension (34) and a flat resilient safety (32) that partially covers the circular hole (33), being intended for securing the telescopic window brace against releasing from the window wing.