NO180090B - Articulated bracket for reversible window equipped with child locking position - Google Patents

Description

The present invention relates to an articulated arm fitting for a reversible window, which is equipped with a child safety position and which is of the kind where a window frame can be turned around a central pivot axis at an angle of from 0° to 180° in relation to a window frame, by means of two opposite articulated arm fittings, where the window frame in the respective fitting is rotatably supported at a first end of a support arm whose opposite end is carried by and supported by a first support arm and a second support arm, where the support arm is pivotally supported at a first end of the respective first and second support arm, the opposite end of which is pivotably stored in a common attachment part attached to the window frame, and where the arm's swinging movements, at least in one joint arm fitting, can be limited to a smaller swing area by means of a self-locking fuse, which includes a crossbar part, as with the one end is in engagement with the support arm or the fastening part and with the other end is in engagement with one of the support arms, the crossbar part and the cooperating e one support arm is each equipped with a set of cooperating control and locking devices, comprising a control and locking pin which is displaceable in a control slot with an associated locking section, which marks the child lock or locked air position.

It is possible to equip both articulated arm fittings with each a self-locking safety device. However, for practical reasons and in the solutions used in practice, only one hinged arm fitting in reversible windows is equipped with a self-locking safety device, while the other jointed arm fitting is without such a safety device.

The design indicated at the outset is known from

NO 122 614. The self-locking fuse proposed in the aforementioned Norwegian patent has a vertically sliding bolt part (fall lock) attached to the fastening part and has a cooperating locking part rigidly attached to and projecting laterally outwards from a first support arm. The transom part and the locking part ensure that the window frame can be swung back and forth from the closed position a limited swing arc to be able to set the window in different, desired ventilation positions. The swing arc is limited so that children cannot fall out through the window opening. On this occasion, the self-locking safety device is most often called a "child safety device". However, it is possible, by manual action of an impact part on the transom part, to cancel the self-locking safety, for example to turn the window towards 180° for washing the outside of the window in an easy way.

In other publications, for various reasons, a number of different solutions have been proposed for said self-locking fuse, in order to make the fuse as best as possible suitable for its purpose of use.

In NO 150 171 it is proposed to attach the locking part in the form of a laterally outwardly projecting pin on the first support arm and the crossbar part in the form of a weight-affected articulated arm on the support arm, while in NO 157 112 it is proposed to attach the locking part in the form of a laterally outwardly projecting pin on the first support arm and the crossbar part in the form of a weight-affected articulated arm on the fastening part.

In the known solutions, the control track is delimited so that it is only active during the limited rotation of the window frame which is controlled by the self-locking fuse, while the rotation of the window frame over arbitrarily larger turning arcs occurs independently of the self-locking fuse.

With the present invention, the general aim is to develop a fuse which is easy to manufacture and simple to operate and which is also operationally reliable. On this occasion, it is important that it can withstand the strength requirements of the regulations (BS 6375). According to the invention, the particular aim is to be able to secure the engagement between the guide pin and the guide track throughout the window frame's swing movement, i.e. both during the limited swing within an air position area and during the continued swing outside the latter area.

The joint arm fitting according to the invention is characterized in that the locking section of the guide track is arranged in an area between a relatively short inner, end-to-end closed track part and a more elongated outer, end-to-end closed track part and the guide pin ensures continuous control engagement between the guide pin and the guide track throughout the window frame's movement range.

With the above-mentioned solution, the foundation has been laid for effective control of the window's various swing movements, so that malfunctions resulting from a lack of intervention between the control parts can be counteracted. In addition, the foundation has been laid for an accompanying simple operation of the fuse as well as a favorable constructional design of the fuse.

It is preferred according to the invention that the guide track with associated locking section is formed in one, first support arm and runs mostly in the longitudinal direction of the support arm and is preferably arranged at the side edge facing the second support arm. Hereby, one can, among other things, incorporate the locking section into the support arm itself and by corresponding dimensioning of the support arm, one can ensure an efficient power transfer from the securing device via the support arm to the attachment part.

Furthermore, according to the invention, it is preferred that the guide pin is arranged at one end of the transom part, which forms an articulated arm, the opposite end of which via a pivot pin is pivotally mounted on the support arm in an area between the pivot axis of the window frame and the aforementioned first support arm's pivot point on the support arm, the articulated arm preferably is arranged close to the first support arm's pivot point on the support arm. In this way, a particularly compact, robust construction can be achieved which will be suitable for relatively small windows, but which can also provide significant advantages for large and medium-sized windows.

Further features of the present invention will be apparent from the following description, where reference is made to the accompanying drawings, in which: Fig. 1 shows in vertical view a reversible window with the joint arm fitting according to the invention. Fig. 2-5 shows in side view the joint arm fitting according to fig. 1 in four different positions for the joint arm fitting.

In fig. 1 shows a window frame 10 and a window frame 11 with associated window glass, not shown in detail. The window frame 11 is attached to the window frame 10 with two link arm fittings 13, one on each vertical side of the window frame. In the drawings, only one of the closest joint arm fittings is shown, i.e. the fitting which is attached to the not shown vertical side of the window frame placed closest to the plane of the drawing, as the other joint arm fitting can be designed largely in a mirror image shape and attached to the vertical side shown 10a of the window frame.

For practical reasons, it is preferred that only one, i.e. the fitting shown in the drawing, is equipped with a self-locking fuse 14, while the other, rear fitting is without the fuse 14. In other words, both fittings can have a similar shape as shown here or the other fittings, not shown, can have an arbitrary design that can be used together with the fitting 13.

In general, the joint arm fitting is made up of a fastening part 15 which forms a common support part for the other fitting parts as well as the window frame 11 and which can be clamped to the window frame with fastening screws 16. On the fastening part 15, a pivot pin 17 for a first, lower end is pivotally mounted at suitable distances from each other of a first support arm 18 and a pivot pin 19 for a first, lower end of a second support arm 20.

The support arms 18,20 are, by means of a pivot pin 21 at the second, upper end of the support arm 18 and a pivot pin 22 at the second, upper end of the support arm 20, linked to a support arm 23 at its one, upper end.

At the other, lower end of the support arm 23, via a pivot pin 24, the window frame 11 itself is pivotably stored about its horizontal central axis 1a which coincides with the pivot pin 24's pivot axis. The one of the window frame 11, in fig.

At the upper end shown, by means of a sliding part 11b, which is pivotally stored at lic in the window frame 11, it can be slid in a guide rail 10b.

The window frame 11 is therefore equipped at one end with a pair of sliding parts 11b, one on each side of the window frame 11, while in the middle it is equipped with a pair of pivot pins 24, one on each side of the frame 11, so that the window frame 11 can be pivoted in a space between the joint arm fittings 13 approximately 180° from normally closed to fully pivoted position. Consequently, the window frame 11 is stored around a pivot axis 1a which passes through corresponding pivot pins 24 in the two cooperating joint arm fittings 13 which are placed on opposite sides of the window frame 11, while one end of the window frame via the sliding parts 11b is arranged to slide in vertical direction in the window frame 10.

In an area between the pivot pin 24 for the window frame II and the pivot pin 21 for the first support arm 18, on the support arm 23, via a pivot pin 25, one upper end of an articulated arm 26 is pivotally mounted. In the embodiment shown, the pivot pin 24 is arranged relatively close to the pivot pin 21. The other, lower end of the joint arm 26 carries a laterally directed guide pin 27, which is slidable in a guide groove 28 formed in said first support arm 18. In the guide groove 28, there is between a first rectilinear groove part 28a and a second rectilinear groove part 28b in an intermediate, approximately S-shaped groove part 28c, a detent part 29 is designed for the guide pin 27. The joint arm 26 with the associated guide pin 27 and parts of the support arm 18 with the associated guide groove 28 and detent part 29 together make up the above-mentioned, self-locking fuse 14.

The joint arm fitting not shown here can, as mentioned, be without safety device 14, i.e. only the locking part 29 in the guide track 28 may have been omitted or alternatively the joint arm 26 and the guide pin 27 may have been omitted. Optionally, the guide track 28 in the support arm 18 may also have been omitted.

The joint arm 26 is, as shown in fig. 2-5, extended a bit beyond the guide pin 27 with an impact tab 30, which can be manually actuated, to positively lift the joint arm 26 in the direction of arrow A and thereby push the guide pin 27 laterally out of the locking portion 29 in the guide groove 28.

In fig. 2, the fitting 13 is shown in the inactive position with the window in the closed position. As a result of the shown progress on the joint arm 2 6 between the pivot pin 25 and the guide pin 27, one can - by swinging out the window frame 11 from the closed position (with the fitting 13 in the position as shown in fig. 2) to the one in fig. 1 air position, as shown by arrow B - ensure that the support arm 23 pulls the guide pin 27 into place in the locking part 29 in the direction of arrow C, as shown in fig. 3.

In fig. 3, the bracket is shown in the "childproof" air position by means of the safety device 14, after the bracket 13 has been allowed to swing from the one in fig. 2 to that in fig. 3 shown position, while the guide pin 27 has moved in the track part 28a towards the locking part 29.

After the fuse 14 has been lifted by manual action of the tab 30 and the consequent displacement of the guide pin 27, one can then, as indicated in fig. 4 ensure that the joint arm 26 pulls the guide pin 27 further in the direction of arrow C through the S-shaped groove part 28c and further in the second groove part 28b towards its end part. With the guide pin 27 pushed inwards in this end part, the window frame 11 is rotated 90° from the closed position and by further turning the window frame a further 80-90°, the guide pin is pushed into place in the innermost part 28a of the guide track 28. This means that a largely equivalent self-locking range of movement can be achieved for the window frame 11 in the case of oscillations in the range of 170-180° from the normally closed window position. This can be advantageous, for example, in connection with washing the window glass on the outside of the window when it faces the inner room.

For reasons of space, it has been ensured that the track portion 28b runs close to the longitudinal axis 18a of the support arm 18, parallel to this axis. In order to ensure a favorable course of the control track 28 otherwise, i.e. the course of the S-shaped intermediate part 28c and the adjacent track part 28a, the support arm 18 is equipped with a laterally projecting part 18b which can be swung inwards on the underside of the support arm 20 by its lower pivot pin 19.

For structural reasons, the support arms 18, 20 are placed in one and the same pivot plane, while the joint arm 26 is placed in a pivot plane between the pivot plane of the support arm 23 and the pivot plane of the support arms 18, 20, as shown in fig. 6 and 7.

To ensure additional longitudinal stiffening of the support arm 18, this is equipped between the outer ends with a longitudinal concave depression on one side of the arm and a corresponding convex inclination 32 on the opposite side of the arm. Alternatively, the arm 18 can be reinforced by producing the arm 18 with greater thickness and possibly omitting said recess or inclination 32.

Claims (6)

1. Articulated arm fitting (13) for a reversible window, which is equipped with a child safety position and which is of the kind where a window frame (11) can be turned around a central pivot axis (lia) at an angle of from 0° to 180° in relation to a window frame (10), by means of two opposite joint arm fittings (13), where the window frame (11) in the respective fitting (13) is rotatably stored in a first end of a support arm (23) whose opposite end is carried by and supported by a first support arm (18) and a second support arm (20), where the support arm (23) is pivotally supported at a first end of the respective first and second support arms (18,20), the opposite end of which is pivotally supported in a common fastening part ( 15) attached to the window frame (10), and where the arms (18, 20, 23) swing movements, at least in one joint arm fitting (13), can be limited to a smaller swing area by means of a self-locking fuse (14), which includes a bolt part (2 6), which engages with the support arm at one end (23) or the fastening part (15) and with the other end is in engagement with one support arm (18), the crossbar part (26) and the cooperating one support arm (18) are each equipped with a set of cooperating control and locking means, comprising a guide pin (27) which is displaceable in a guide groove (28) with an associated locking section (29) which marks the child safety position or blocked ventilation position, characterized by that the locking section (29) of the guide track (28) is arranged in an area between a relatively short inner, end-to-end closed track part (28a) and a more elongated outer, end-to-end closed track part (28b), and that the guide pin (27) ensures continuous guide engagement between the guide pin (27) and the guide track (28) throughout the window frame's (11) movement range. 2. Joint arm fittings in accordance with claim 1, characterized by that the guide track (28) with associated locking section (29) is formed in one, first support arm (18) and runs mostly in the longitudinal direction of the support arm (18) and is preferably arranged at the side edge facing the second support arm (20). 3. Joint arm fitting in accordance with claim 1 or 2, characterized by that the guide pin (27) is arranged at one end of the transom part, which forms an articulated arm (26), the opposite end of which via a pivot pin (24) is pivotally supported on the support arm (23) in an area between the pivot axis of the window frame (11) (lia ) and the pivot point (21) of the aforementioned first support arm (18) on the support arm (23), the joint arm (26) is preferably arranged close to the pivot point (17) of the first support arm (18) on the support arm (23). 4. Joint arm fittings in accordance with claim 3, characterized by that the joint arm (26) is extended end-to-end past the guide pin (27) to form a manual impact tab (30) to cancel the safety's (14) locking engagement, i.e. the engagement between the guide pin (27) and the locking part (29). 5. Joint arm fittings in accordance with one of claims 1-4, characterized by that the pivoting plane of the joint arm (26) is arranged between the pivoting plane of the support arms (18,20), which in a manner known per se is part of one and the same plane, and the pivoting plane of the support arm (23), while the joint arm's (26) guide pin (27) protrudes from the joint arm (26) laterally into the pivoting plane of the support arms (18,20) in the associated guide groove (28). 6. Joint arm fitting in accordance with one of claims 1-5, characterized by that the control track (28) has a first relatively rectilinear track section (28a) for controlling the oscillation of the joint arm fitting (13) to and from the relevant air positions and a second relatively rectilinear track section (28b) for controlling the oscillation of the joint arm fitting (13) to and from maximum output turned position, including the 180° turned position of the window frame (11), as well as an intermediate largely S-shaped groove part (28c) including the locking section (29), as the second track part (28b) runs parallel to an axis (18a) through the corresponding support arm (18)'s opposite pivot points, while the first track part (28a) and the largely S-shaped track part (28c) are arranged at a significantly greater distance from the axis (18a) through the corresponding support arm (18)'s opposite pivot points (at 17,21) in a sideways out - wide part, which in the folded state of the fitting (13) is designed to be accommodated in a space between the support arms (18,20).