Opening limiter

Abstract

The invention relates to a device (1) for limiting the opening angle of a leaf (11) of a window, a door or the like, the device having a stay arm (2) which is rotatably articulated at one end on the frame (5) and at the other end on the leaf (11) and is provided at one end with a sliding shoe (9), the sliding shoe being displaceably mounted on the associated leaf (11) or frame (5) in an undercut, C-shaped channel or fitting groove (10) and interacting, in order to brake the opening movement of the leaf (11), with a damping element (15) which is accommodated in the housing (20) fastened in the channel of the leaf (11). In order to provide an opening angle limiting means which is easy to install, inexpensive and effective, the damping element (15) is a fluid damper which projects with a piston rod (16) beyond a housing edge (17) in the direction of the sliding shoe (9).

Description

[0001] Opening limiter

[0002] The invention relates to a device according to the preamble of claim 1.

[0003] Such devices are already known. DE 2436299 C3 discloses a device for limiting the opening angle of a sash of a window or door, comprising a projection arm pivotally connected at one end to the frame and at the other end to the casement, and provided at one end with a sliding shoe that is slidably mounted on the associated frame. Due to the design of the damping element in such a way that it is strip-shaped and consists of several successive rings, each connected to one another by a web extending in the direction of displacement, the damping characteristic curve is relatively flat. Nevertheless, depending on the sash weight and the type of opening speed, the damping characteristic curve is still hard and jerky.Furthermore, this design requires the damping element to spring back after elastic deformation, causing the sash to close in the opposite direction to its opening movement. This is not always desirable, as a person attempting to pass through the frame opening could be caught by the sash swinging back.

[0004] DE 19717937 A1 discloses a braking and damping element for movable furniture parts of the type initially described. This element consists of a piston that can be displaced within a cylinder and expanded radially. The piston is designed such that compression of the air caused by insertion of the piston causes radial expansion or expansion of the piston, which, in addition to the damping effect provided by the compressed air, also creates a braking effect due to the friction of the piston against the inner wall of the cylinder. The braking effect is beneficial and converts part of the kinetic energy into heat. However, it is also intended that the return movement is effected by the compressed air of the damper, which, on the one hand, only allows for low weights of the movable furniture part and, on the other hand, can lead to undesirable swinging back.

[0005] To prevent the sash from swinging back, EP 3865649 A1 provides that the extension arm of the opening restrictor is provided with a slider that is longitudinally displaceably received in a C-shaped fitting receiving groove. The slider strikes a stopper in the desired pivoting end position. The slider is equipped with a locking element facing the stopper at one longitudinal end and with an impact surface at the opposite end. This allows the slider and stopper to be optionally locked, preventing the sash from swinging back and fixing it in the open position. This is also evident from DE 102012104851 A1 and DE 102012104861 A1. To reduce the impact speed of the slider against the stopper, the slider can be coupled to a friction element.In a second installation position of the slider, the impact surfaces can be arranged so that the slider's locking element does not collide with the stopper. The friction element creates a constant resistance when opening and closing the sash. The resistance of the friction element must be overcome over the entire displacement path in the fitting groove. This makes opening and closing the sash more difficult. The friction also wears the friction element and reduces its effectiveness over time. The invention is based on the object of avoiding the disadvantages of the prior art. To this end, the invention provides the features of claim 1.

[0006] By designing the damping element as a fluid damper, which projects with a piston rod over a housing edge toward the slide shoe, effective damping is achieved in the final region of the opening movement, and the kinetic energy is absorbed and dissipated by the fluid damper. Although an elastic return movement of the piston of the fluid damper is achieved via a return element, e.g., a spring within the cylinder, the return force is very low. Fluid dampers are already known in various designs (e.g., US 5507070). A damper according to claim 1 is known from DE 9300650 U1.

[0007] In order to protect the piston rod from transverse forces in the maximum extension position, a locking hook protruding parallel to the piston rod is provided on the housing.

[0008] A structurally simple design is achieved if the locking hook is an angled arm of an L-shaped wall forming the edge of the housing.

[0009] In order to optimally support the piston rod, it is intended that the piston rod penetrates the edge of the housing in a bore.

[0010] In order to fix the wing in the end position, the sliding shoe is provided with a locking hook pointing towards the housing.

[0011] A particularly simple and at the same time functional design provides that the housing has a rail to which a screw guide element and a closure are attached to the housing wall.

[0012] In order to make optimal use of the limited installation space, the housing is designed to be inserted into a C-shaped fitting groove.

[0013] In this case, the sliding shoe can also be mounted so that it can move in the fitting receiving groove.

[0014] Further advantageous embodiments are shown in the drawings. Fig. 1 shows a view of the opening limiter with the sash almost fully open, without the sash

[0015] Fig. 2 an individual assembly of the damper and the sliding shoe,

[0016] Fig. 3 a detailed view of the housing without the damper,

[0017] Fig. 4 a detailed view of the sliding shoe and the damper on an enlarged scale when they meet,

[0018] Fig. 5 a detailed view of the sliding shoe and the damper in an enlarged scale in the end position and

[0019] Fig. 6 a section through the wing profile with the damper.

[0020] Fig. 1 shows a device 1 for limiting the opening angle of a sash with a projection arm 2. The projection arm 2 is rotatably attached at one end 3 to a frame bearing block 4 and is only partially shown here as a frame 5. For detachable coupling to the frame bearing block 4, a fixed pin 6 is attached to the frame bearing block 4. The pin 6 has a mushroom shape due to a widened head. A tab 7 pivotably attached to the projection arm 2 serves to lock the projection arm 2 to the frame bearing block 4. For this purpose, the tab 7 closes part of the bore in the projection arm 2 which is matched to the enlarged head. Reference is also made to DE 8903520 U1.

[0021] The extension arm 2 is pivotally and slidably connected to the sash 11 at the end 8 opposite the end 3. A sliding block 9 is provided at the end 8 for this purpose. The sliding block 9 is slidably mounted in the C-shaped fitting groove 10 (Fig. 6) of the sash 11. The sash 11 is pivotally mounted on the frame 5 at least about an axis 12. A stopper 13 is assigned to the sliding block 9 in the fitting groove 10 in the direction of the axis 12. The sliding block 9 engages behind webs projecting laterally from the groove side walls with a widened foot 14, as shown in Fig. 2.

[0022] The sliding block 9 is mounted on the sash 11 in the fitting groove 10 for sliding movement. Alternatively, a profile rail can be attached to the sash rebate, forming an undercut C-shaped guide channel corresponding to the fitting groove 10.

[0023] The structure of the stopper 13 is evident from Fig. 2. The stopper 13 has a damping element 15 which serves to slow down the opening movement of the wing 11. For this purpose, the damping element 15 is designed as a fluid damper according to DE 9300650 U1. The fluid damper protrudes with a piston rod 16 over a housing edge 17 facing the sliding block 9. The fluid damper used has a piston connected to the piston rod 16 which is slidably mounted in a cylinder. The piston has bores which enable the hydraulic fluid to flow from a storage chamber, into which the piston is forced by the piston rod 16, into the chamber behind the piston. The bores are comparatively small in diameter so that the fluid flow is significantly slowed down. A return spring acts on the piston rod 16, which pushes the piston and the piston rod 16 back into the position shown in Fig. 2.The housing edge 17 has a locking hook 18 projecting toward the sliding block 9. The locking hook 18 forms an arm or finger angled from the housing edge 17, and the housing edge 17 is part of an L-shaped wall. A corresponding locking hook 19 on the sliding block 9 faces this wall. The piston rod 16 projects beyond the front edge 29 of the locking hook 18.

[0024] As Fig. 2 shows, the stopper 13 forms a compact component that has a housing 20 with a U-shaped cross-section transverse to the longitudinal direction. The housing 20 consists of a rail 21 and an angular end 22, which forms the housing edge 17. A fastening projection 23 lies opposite the end 22 on the rail 21 in the longitudinal direction. Between the end 22 and the fastening projection 23, an installation space 24 for receiving the fluid damper 8 is created (Fig. 3). A bore 25 is provided in the end 22, which runs coaxially to a recess 26 in the longitudinal direction of the rail 21. As can be seen from Fig. 2, the fluid damper is cylindrical and the installation space 24 is thus clamped at both longitudinal ends and along the cylindrical outer surface of the fluid damper. The fastening projection 23 is designed as a screw guide element 27 and has through holes 28 for receiving fastening screws.

[0025] Figures 4 and 5 show the interaction of the sliding block 9 with the damping element 14. After the leaf has pivoted through a distance of approximately 80°, approximately 10° before reaching the closed position, the sliding block 9 abuts the piston rod 16 with its vertical edge 29. At this opening angle, the piston rod 16 protrudes by a distance of 30°.

[0026] If the sash 11 is opened further from the pivoting angle shown in Fig. 4, the damping element 14 slows the speed of the opening sash 11 via the guide shoe 9 and the extension arm 2. As the opening movement continues, the locking hook 19 strikes the locking hook 18, which runs parallel to the piston rod 16, and deflects it elastically. A further opening movement ultimately causes the locking hooks 19, 18 to engage behind each other in a locking manner. The maximum opening angle is then limited and fixed.

[0027] From Fig. 2 it is also clear that in the middle through hole 28 of the

[0028] A magnet 31 is accommodated in the fastening projection 23. The magnet 31 serves to secure the extension arm 2 in a defined position when the sash is not mounted.

[0029] The extension arm 2 is thereby in the longitudinal direction of the housing 20

[0030] Fig. 6 shows that the rail 21 can be fitted between the mutually facing webs of the fitting groove 10 and is almost completely received in the fitting groove.

[0031] List of reference symbols

[0032] 1 device

[0033] 2 extension arms

[0034] 3 End

[0035] 4 frame bearing block

[0036] 5 frames

[0037] 6 cones

[0038] 7 tab

[0039] 8 End

[0040] 9 Sliding shoe

[0041] 10 Fitting groove

[0042] 11 wings

[0043] 12 Axis

[0044] 13 stoppers

[0045] 14 feet

[0046] 15 Damping element

[0047] 16 Piston rod

[0048] 17 Housing edge

[0049] 18 locking hooks

[0050] 19 locking hooks

[0051] 20 housings

[0052] 21 Rail

[0053] 22 Conclusion

[0054] 23 Mounting attachment

[0055] 24 Installation space

[0056] 25 bore

[0057] 26 trough

[0058] 27 Screw guide element

[0059] 28 through holes

[0060] 29 edge

[0061] 30 measures

[0062] 31 Magnet

Claims

Claims 1. Device (1) for limiting the opening angle of a sash (11) of a window, a door or the like, with a projection arm (2) which is pivotally connected at one end to the frame (5) and at the other end to the sash (11) and is provided at one end with a sliding shoe (9) which is displaceably mounted on the associated sash (11) or frame (5) in an undercut, egg-shaped channel or fitting groove (10) and which cooperates to brake the opening movement of the sash (11) by means of a damping element (14) which is accommodated in the housing (20) fastened to the channel of the sash (11), characterized in that the damping element (15) is a fluid damper which projects with a piston rod (16) over a housing edge (17) in the direction of the sliding shoe (9).

2. Device according to claim 1, characterized in that a locking hook (18) projecting parallel to the piston rod (16) is provided on the housing (20).

3. Device according to claim 2, characterized in that the locking hook (18) is an angled arm of an L-shaped wall forming the housing edge (17).

4. Device according to one or more of claims 1 to 3, characterized in that the piston rod (16) penetrates the housing edge (17) in a bore (25).

5. Device according to one or more of claims 1 to 4, characterized in that the sliding shoe (9) forms a locking hook (19) pointing in the direction of the housing (20).

6. Device according to one or more of claims 1 to 5, characterized in that the housing (20) has a rail (21) to which a screw guide element (27) and a closure (22) are fastened to the housing edge (17).

7. Window or door with a device according to one or more of claims 1 to 6, characterized in that the housing (20) can be inserted into a C-shaped fitting receiving groove (10).

8. Window or door according to claim 7, characterized in that the sliding shoe (9) is slidably mounted in the fitting groove (10).

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