DE8805504U1 - Scissor bearing of a tilt and turn fitting - Google Patents

Abstract

In order, in a scissor bearing, that is to say an upper rotary bearing, of a turn-and-tilt wing of a window or door, to make it possible to secure in its working position the removable bearing bolt on which the setting-out device is rotatably mounted, a securing element (13, 16) is attached to the basic body (1). It is mounted preferably rotatably on the basic body. In its working position, it engages over the bearing bolt (6), especially a head (15) of the latter, whilst in the release position it is located outside the range of movement or displacement of the bearing bolt. In addition, there can also be holding members (23, 25) which can fix the bearing bolt in its two exposed positions. The bearing is preferably of symmetrical design, so that it is suitable for right- hand and left-hand fitting. <IMAGE>

Description

17 375 B/sta

Gretsch-Unitas GmbH Building fittings
Johann-Maus-Str. 3

7257 Ditzingen

Scissor bearing of a tilt and turn fitting

The invention relates to a scissor bearing of a tilt-and-turn fitting, of the type described in the preamble of claim 1. It is normally attached to the upper axial corner of the frame. The extension arm or an arm of an extension scissor is pivotally connected to this scissor bearing, with the axis connection being made via the bearing bolt.

In order to be able to hang and unhook the sash, the bearing bolt must be detachable. Normally, it is pulled out of the scissor bearing completely or at least far enough so that the space between the two bearing holes is completely freed up. If the bearing bolt is only pulled out of one, preferably the lower, bearing hole, a suitable way must be taken to ensure that it is held in its release position. The advantage in the latter case is that the bearing bolt always remains on the scissor bearing and cannot be lost.

The lower bearing point of the tilt-and-turn fitting is assigned to the lower corner of the frame on the axis side. In the case of a tilt-and-turn sash of a window, door or similar, it consists of a so-called corner bearing. A bearing sleeve is attached to the sash side, which is pushed over a tiltable axis bolt on the frame.

During construction, the sash often has to be hung and unhooked several times. For this reason, it is desirable that the bearing bolt on the scissor bearing can be released as easily as possible. On the other hand, it should be held securely in its working position when the sash is hung.

In a known scissor bearing, one of the fastening screws for the base body is arranged so that its head is in the

area of the layer bolt, so that it can only be moved when the screw is unscrewed. It is very disadvantageous that the fastening screw has to be unscrewed each time the sash is removed. On the one hand, it can easily get lost and, on the other hand, it is often not screwed in again for convenience after the sash has been removed. In addition, a screw cannot be unscrewed and screwed in again as often as one likes, for example in a plastic or wooden frame.

Another way to secure the bearing bolt is that a leaf spring, which is attached to the base body of the scissor bearing, extends into the movement area of the bearing bolt. To unhook the sash, you simply have to push the spring back. Adequate security is guaranteed with this leaf spring, but it is a sharp-edged component that can cause injuries when cleaning.

The object of the invention is therefore to further develop a scissor bearing of the type described in the preamble of claim 1 in such a way that the bearing bolt is held securely and injury by the securing element is excluded, whereby the coupling and uncoupling of the extension device should be ^as simple and quick as before.

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To solve this problem, the invention proposes that the scissor bearing is designed according to the preamble of claim 1 in accordance with the characterizing part of this claim. By using a securing element, which is not used to hold the bearing bolt in its release position, the undesired displacement of the bearing bolt can be safely prevented. The securing element has at least two distinct positions, namely a working position in which it protrudes into the displacement area of the bearing bolt so that it cannot be displaced or can only be displaced insignificantly, and a release position in which it is so far outside the displacement area of the bearing bolt that it can neither prevent nor impair its displacement. So if you hang the sash and couple the opening device to this upper scissor bearing by inserting or at least moving the bearing bolt, all that is then required is to transfer the locking element from its release position to its working position in order to hold the sash securely to the frame.

A preferred embodiment of the invention is characterized in that the or each securing element is rotatably mounted on the base body, with the axis of rotation running transversely to the bearing bolt axis. This makes the securing element easily accessible and therefore easy to operate. All that is required is a hole in the base body and a suitable securing device against axial

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- 8 All movement of the locking element.

A further development of the invention is characterized by a head of the securing element, the part of which protrudes into the displacement area of the bearing bolt in the release position is removed. When the securing element is in its release position, the bearing bolt can easily be moved sideways past the head of the securing element because it has been partially removed or shaped accordingly. However, if the securing element is turned, in particular by approx. 90 °, the remaining part of the head or the specially designed head now enters the movement area of the bearing bolt and blocks its displacement movement from the working position to the release position for the extension device. Instead of a laterally removed or specially shaped bearing bolt head, an eccentric, axially protruding projection can also be provided on a correspondingly flatter head. The working and mode of operation is the same as described above.

In this sense, a further embodiment of the invention is designed, which is characterized by an axially protruding projection or head arranged eccentrically to the axis of rotation of the securing element, which is located outside the bearing bolt displacement area in the release position and projects into the latter in the working or locking position, directly overlapping the associated bolt end. This head, which is attached eccentrically to the shaft, acts in the same way as an eccentric

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A further development of the invention is characterized in that the securing element is held in the manner of a rivet on the preferably plate-shaped base body in a way that it can rotate but cannot be moved. This securing element or these securing elements are characterized by a particularly simple construction and thus by robust behavior and low costs. This also ensures that they cannot be lost.

Another preferred embodiment of the invention is characterized by a projection or a receptacle for a turning tool, in particular a screw slot. This slot can also be used at the same time as an indicator for the positions of the locking element. For example, the slot can be arranged so that in the release position it runs parallel to the geometric axis of the bearing bolt and in the locking position it runs perpendicular to it. If the receptacle is to be used in two ways, namely also to indicate the position, a Phillips head that is otherwise suitable for adjustment without a special marking is not suitable.

A particularly important variant of the invention is characterized by a design that is symmetrical to the middle of the space between two bearing eyes that have bearing recesses and the likewise symmetrical arrangement of two optionally usable securing elements, whereby the bearing bolt has a thickened head with which one of the securing elements can be

its working position. Normally, the head is located at the upper end of the bearing bolt and in this case the locking element located above or to the side above the bearing bolt head is used to secure the bolt.

A further development of the invention is characterized by a first holding member which engages in a notch or circumferential groove of the bearing bolt in its release position and thus secures it in its release position against unwanted return to the working position. It is particularly advantageous if there is a second holding member which engages in the notch or circumferential groove of the bearing bolt in its working position, whereby the first holding member is locked in a second notch or circumferential groove of the bearing bolt. This bolt is locked in both its working position and its release position for the extension device by two or one such holding member. However, because the locking should only take place with a relatively low force in order to be able to easily overcome it when the bearing bolt is released, these lockings cannot be relied upon in the working position of the bearing bolt, which is why the working position is additionally secured by a safety element.

It is particularly advantageous if the holding members are each held in an opening or similar in the base body by friction locking and each has a spring-elastic part, in particular a central

piece. This spring-elastic part makes it possible to unlock the bearing bolt with a short jerk when the locking element is in the release position, whereby each holding element elastically moves sideways. When the notch or circumferential groove at the rear in the direction of extraction of the bearing bolt has reached the upper holding element, the latter springs elastically into the notch or circumferential groove and thereby secures the raised position of the bearing bolt.

The invention is explained in more detail below with reference to the drawing. The drawing shows an embodiment of the invention. Here:

Fig. 1 a front view of the scissor bearing with the extension device disengaged, partially cut vertically,

Fig. 2 is a side view of Fig. 1, again partially cut vertically,

Fig. 3 is a section along the line III-III of Fig. 1,

Fig. 4 is a partial section along line IV-IV of Fig. 1 with the bearing bolt removed and the locking element in the release position,

Fig. 5 a comparable illustration with the safety element in the working position,

Fig. 6 shows a perspective view of the scissor bearing with secured bearing bolt.

The scissor bearing has a base body 1 designed as a bearing plate and two bearing eyes 2 and 3, each with a bearing hole 4 and 5 respectively. A bearing bolt 6 can be inserted into these aligned bearing holes. The scissor bearing is designed symmetrically to a plane 7 extending perpendicular to the image plane. In order to be able to attach it to a frame, it has at least one, but preferably two, through-holes 8 to 11 on both sides of this symmetrical drive plane. Between the two bearing eyes 2 and 3, a recess 12 with an open edge is provided on the base body 1. This creates the necessary space for a bearing eye attached to the hinged end of a projection arm or projection device. The latter is also penetrated by the bearing bolt 6 in its working position. The bearing bolt 6 is secured in its working position shown in Fig. 6 by means of a locking element 13 against unintentional displacement in the direction of the arrow 14. In the opposite direction, the bearing bolt can be held securely against displacement by a thickened head 15. Due to the symmetrical design of the scissor bearing, symmetrical to the plane 7 below the open edge

A securing element 16 is also provided in a recess 12. Both are mounted so that they can rotate about an axis that extends perpendicularly to the plane of the image in Fig. 1. From Fig. 4 it can be seen that each securing element consists of a shaft 17 and a head 18, whereby the rear end of the shaft is permanently deformed to form a rivet head 19. However, the riveting is carried out in such a way that the securing element can be rotated about its axis 20. It can also be seen that the head 18 has been partially removed on its right-hand side in Fig. 4. This means that the thickened head 15 of the bearing bolt 6 can be moved as desired in the direction of arrow 14 or in the opposite direction without being hindered by the securing element in this rotational position (release position).

However, if the locking element is rotated 90° from the release position in Fig. 4 in the direction of arrow 21 (Fig. 6), the remaining head part comes into the movement range of the bolt head 15. It is preferably located directly above the bolt, so that the bolt can no longer be moved in the direction of arrow 14. In order to achieve this movement protection, there is of course no need for a thickened head on the bearing bolt, rather it is only important that the locking element is in its working position in the movement range of the bearing bolt. If the locking bolt is inserted from below in the embodiment according to Fig. 6, it can be secured against being pulled out in the opposite direction to arrow 14 using the lower locking element 16.

In order to be able to hang and unhook the Aussi illyju. xchturig without having to completely remove the bearing bolt, it is provided with a first circumferential groove 22 at its lower end in Fig. 1. If this is located within the upper bearing eye 2, a first holding element 23 located therein can snap into the groove 22. This then allows the bearing bolt to be securely locked in the raised release position shown in Fig. 2. The bearing bolt is, however, also equipped with a second circumferential groove 24, which is located in the area of the thickened head 15. The first holding element 23 engages in this in the working position of the bearing bolt 6. A second holding element 25 on the lower bearing eye 3 snaps into the first circumferential groove 22 in the working position of the bearing bolt. This ensures that this scissor bearing can be used on the right and left.

Fig. 3 shows the shape of the holding members 23 and 25 in a top view. They are made of spring-elastic plastic and have a ring-shaped, spring-elastic center piece 26. With this it is held in place by friction in an opening 27. An inner strip 28 forms the locking member, which can enter directly into the associated circumferential groove. A head piece 29 is housed flush in an external widening of the opening 27. In the direction of arrow 30, the holding member 23 or 25 cannot move even when locking in and out , because when the scissor bearing is installed, the head piece 29 is supported on the frame.

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From Fig. 6 it can be seen that the thickened head 15 does not rest directly on the upper bearing eye 2, but with a thickened shaft part underneath and is therefore at a certain distance from the bearing eye. The blade of a screwdriver or another suitable tool can be inserted into the gap 31 thus formed and the bearing bolt can be lifted by lever action or simply by exerting pressure on the lower edge of the thickened head 15 at least far enough that it disengages from the holding members 23 and 25, if any. It can then be easily pulled up by hand into the position shown in Fig. 2.

The securing elements 13 and 16 are also important in a scissor bearing that has no holding members 23, 25 or at least no holding member for the raised bearing bolt 6. i.e. they also secure a bearing bolt that is generally completely removed to unhook the opening device.

It remains to be added that a particularly slot-shaped receptacle 32 on the head 18 of the locking element 13, 16 enables its rotation with the aid of a suitable tool, for example a screwdriver, and it can also take on the function of a fine display device which, depending on the rotation position, indicates the release position or the working position of the locking element.

Claims (10)

17 375 B/sta claims 1. Scissor bearing of a tilt-and-turn fitting with two bearing holes (4, 5) arranged at a distance on a base body (1), between which a bearing eye or the like of the extension device engages, whereby a bearing bolt (6) in its working position engages in the bearing holes and the bearing eye, while in a retracted or extended position for the extension device it is held in only one bearing hole (4) and the space between the bearing holes (4, 5) is released, characterized in that at least one adjustable securing element (13, 16) is attached to the base body (1) of the scissor bearing, which in its working position projects into the displacement area of the bearing bolt (4) and in its release position is located outside the displacement area of the bearing bolt (4). 2, Scissor bearing according to claim 1, characterized in that the or each securing element (13, 16) is rotatably mounted on the base body (1), wherein in particular the axis of rotation (2) runs transversely to the bearing pin axis. &bull; · ■■· a · « r · · ■ ·· &igr; 3. Scissor bearing according to claim 2, characterized by a head (18) of the securing element (13, 16) whose part protruding into the sliding area of the bearing bolt (4) in the release position is removed. 4. Scissor bearing according to claim 2, characterized by an axially protruding projection or head arranged eccentrically to the axis of rotation (20) of the securing element (13, 16), which: -is located outside the bearing bolt displacement area in the release position and projects into the latter in the working or locking position, directly overlapping the associated bolt end (15). 5. Scissor bearing according to at least one of claims 2 to 4, characterized in that the securing element (13, 16) is held in the manner of a rivet on the preferably plate-shaped base body (1) in a rotatable but non-displaceable manner. 6. Scissor bearing according to claim 5, characterized by a projection or a receptacle (32) for a turning tool, in particular a screw slot. 7. Scissor bearing according to at least one of the preceding claims, characterized by a design symmetrical to the middle of the space between two bearing eyes (2, 3) having the bearing bores (4, 5) and the likewise symmetrical Arrangement of two optionally usable securing elements (13, 16), wherein the bearing bolt (6) has a thickened head (15) with which one of the securing elements (13, 16) interacts. 8. Scissor bearing according to at least one of the preceding claims, characterized by a first holding member (23) which engages in a notch or circumferential groove (22) of the bearing bolt (6) in its release position. 9. Scissor bearing according to claim 8, characterized by a second holding member (25) which engages in the notch or circumferential groove (22) of the bearing bolt (6) in its working position, wherein the first holding member (13) is locked to a second notch or circumferential groove (24) of the bearing bolt (6). 10. Scissor bearing according to claim 8 or 9, characterized in that the holding members (23, 25) are each held in an opening (27) or the like of the base body (1) by frictional engagement and each has a spring-elastic part, in particular a middle part (26).