Stay shears for a building closure device and corresponding building closure device

Abstract

The invention relates to a scissor arm (10) for a building locking device (1), comprising a guide rail (11) attachable to a frame element (2, 3) of the building locking device (1), a guide carriage (13) displaceably mounted in the guide rail (11), and a scissor arm (15) rotatably mounted on the guide carriage (13), wherein a brake element assembly (18) is arranged on the guide carriage (13), which in a release position releases the guide carriage (13) for displacement relative to the guide rail (11) and in a braking position engages forcefully with the guide rail (11) to brake the guide carriage (13), and wherein the brake element assembly (18) interacts with a connecting rod (19) which is or can be connected to a drive rod (8) via a coupling mechanism (20) and is rotatably mounted about a pivot axis (22).which releases the brake element assembly (18) in a release rotational position for displacement in the direction of the release position and forces it in the direction of the braking position in a braking rotational position. It is provided that the connecting rod (19) has an actuating surface (36) in an actuating area (26) which interacts with the brake element assembly (18) to displace it in the direction of the braking position and has a curvature with a continuously changing radius of curvature in cross-section. The invention further relates to a building locking device (1).

Description

[0001] The invention relates to a scissor arm for a building locking device, comprising a guide rail attachable to a frame element of the building locking device, a guide carriage displaceable in the guide rail, and a scissor arm rotatably mounted on the guide carriage, wherein a brake element arrangement is arranged on the guide carriage which, in a release position, releases the guide carriage for displacement relative to the guide rail and, in a braking position, interacts forcefully with the guide rail to brake the guide carriage, and wherein the brake element arrangement interacts with a connecting rod, rotatably mounted about an axis of rotation, which is connected or connectable to a drive rod via a coupling mechanism.which releases the brake element arrangement in a release rotational angle position for displacement in the direction of the release position and forces it in the direction of the braking position in a braking rotational angle position. The invention further relates to a building locking device.

[0002] For example, the prior art includes German patent application DE 10 2008 049 319 A1. This describes a fitting for windows, doors, or the like, comprising at least one mullion attachable to a sash, at least one drive rod slidably guided behind the mullion, at least one locking element connected to the drive rod, at least one actuating element with which the drive rod is slidable, and at least one locking device for locking the sash in a desired position, which has at least one pivot lever pivotally connected to a guide carriage, wherein the guide carriage is slidably guided in or on at least one guide rail of the fitting and is clamped against displacement by turning a locking rod to lock the sash in a desired position.wherein the rotatable locking rod is connected via a deflection to a drive rod actuated by the actuating element, the deflection converting a substantially linear movement of the drive rod into a rotary movement of the locking rod. The deflection is provided to be held in the guide rail.

[0003] Furthermore, the publication EP 0 472 916 A1 discloses an overhead door closer in which a door closer arm is guided in a sliding rail on the door frame side by a sliding piece, and an adjustable mechanical device is provided to limit the guide area. It is provided that a non-circular rod, rotatably mounted in the sliding rail from the outside, is guided through the sliding piece, and that when this rod is rotated, a blocking element, fixed axially in the sliding piece but radially displaceable, can be locked against a wall of the sliding rail or against a locking element arranged on a wall of the sliding rail.

[0004] Furthermore, publication DE 34 01 970 A1 discloses a tilt-and-turn window with a frame and a sash, which has a rotation braking device controlled by a tilt-and-turn operating linkage and arranged between the lower leg of the sash and the lower leg of the frame. Further prior art is known from publications AT 378 230 A and WO 2011 / 057988 A1.

[0005] The object of the invention is to propose a scissor mechanism for a building locking device which has advantages over known scissor mechanisms, in particular enabling the locking of two frame elements of the building locking device relative to each other in a particularly convenient manner and / or the precise setting or readjustment of a braking force of the scissor mechanism and / or a holding force that is variable via an opening angle of the building locking device.

[0006] According to the invention, this is achieved with a pivoting scissor for a building locking device with the features of claim 1. It is provided that the connecting rod has an actuating surface in an actuating area, which interacts with the brake element arrangement to move it in the direction of the braking position and, viewed in cross-section, has a curvature with a continuously changing radius of curvature.

[0007] Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are possible.

[0008] The hinge mechanism is preferably an integral part of the building locking device, but can of course also be separate from it, particularly until the hinge mechanism is mounted on or in the building locking device. The building locking device is designed and intended for mounting on or in a building. The building has a building envelope on or in which the building locking device is arranged. The building envelope lies between the building's exterior and interior, thus separating them. The building envelope is preferably designed as the building's wall or roof. The building locking device serves to close the building, at least temporarily, and in particular to close a building envelope opening formed by the building envelope, at least temporarily.The building envelope opening, which is at least temporarily closed by means of the building closure device, is therefore either a wall opening or a roof opening.

[0009] The building closure device is preferably designed as a door or a window. The window can be a facade window or a roof window, particularly a residential roof window. The building closure device can be designed to close the building envelope opening in a translucent or opaque manner and can be correspondingly translucent or opaque. If the building closure device is translucent, it has glazing, which can be, for example, single glazing or multiple glazing, particularly double glazing or triple glazing.

[0010] The building closure device comprises several frame elements, namely a first frame element and a second frame element. Each frame element has several frame members. The frame members are attached to one another in such a way that they enclose a section of the building closure device between them. The frame members thus each form a closed frame or a closed frame element. The frame elements, or the multiple frame members, are designed in particular to overlap and / or cover the building envelope opening. Preferably, the frame members are arranged and designed such that they, especially together with the glazing, completely close the building envelope opening, at least temporarily. For this purpose, the glazing is preferably supported by one of the frame elements. For example, it is enclosed by several frame members of the respective frame element.

[0011] The building locking device is openable and closable, meaning it can be opened and closed, and is designed accordingly. Consequently, the building locking device can exist in different states, in which the two frame elements of the building locking device are arranged differently relative to each other. For example, the building locking device is closed in one state and at least partially or even completely open in a second state. The first state can also be referred to as the closed state and the second state as the open state.In the closed state of the building closure device, an opening bounded by a first of the frame elements is closed further by a second of the frame elements than in the open state; in particular, the opening of the first frame element is completely closed by the second frame element in the closed state, preferably together with the glazing.

[0012] The second frame element is displaceable relative to the first frame element, in particular pivotable or rotatable. For this purpose, the second frame element is pivotably mounted about at least one pivot axis relative to the first frame element, in particular on the first frame element. For example, the building locking device is designed and configured solely for rotary opening or solely for tilt opening. Accordingly, there is only a single pivot axis about which the two frame elements are pivotally mounted relative to each other by means of a rotary bearing. If the building locking device is designed such that both rotary opening and tilt opening are possible, the two frame elements are pivotally mounted relative to each other about several different pivot axes, namely about at least or exactly two pivot axes.The pivot axes are preferably angled relative to each other or are skewed. Particularly preferably, the multiple pivot axes enclose an angle of approximately or exactly 90° with each other. A building locking device designed for both turning and tilting can be called a tilt-and-turn building locking device. If the building locking device is in the form of a window, it can be referred to as a tilt-and-turn window.

[0013] The stay arm is part of a fitting used to operate the building locking device. While the fitting can also be separate from the building locking device, it is preferably integrated into it. In addition to the stay arm, the fitting includes, for example, at least one of the following elements: a drive rod, a gearbox, and an operating element or handle. The operating element is preferably rotatably mounted on the building locking device and connected to the drive rod via the gearbox. The gearbox is designed to convert a rotary movement of the operating element into a linear movement of the drive rod. The stay arm is preferably connected to the gearbox, and thus to the operating element, via the drive rod. The stay arm can therefore be operated or adjusted using the operating element.

[0014] To ensure controlled movement of the frame elements relative to each other, and in particular to prevent uncontrolled movement of the two frame elements relative to each other, and / or to fix the two frame elements in a defined position relative to each other, the building locking device has a pivoting scissor mechanism. The two frame elements are coupled to each other via the pivoting scissor mechanism. This means that the pivoting scissor mechanism is coupled to the first frame element on one side and to the second frame element on the other, preferably directly to each. The pivoting scissor mechanism preferably engages the frame elements at a distance from the pivot axis(s).

[0015] The scissor stay has a guide rail that can be attached to, or is attached to, one of the frame elements. For example, the guide rail is attached to the sash frame. Preferably, the guide rail is arranged and attached in a groove of the frame element. Furthermore, the scissor stay has a guide carriage and a scissor stay. The guide carriage is mounted so as to be movable within the guide rail. The scissor stay is pivotally connected to both the guide carriage and the other frame element. Thus, if the guide rail is attached to the first frame element, the scissor stay is pivotally connected to both the guide carriage and the second frame element. Conversely, if the guide rail is attached to the second frame element, the scissor stay is pivotally connected to both the guide carriage and the first frame element.

[0016] The guide carriage is guided in the guide rail so that it can be moved linearly, and in particular, only in a linear manner. When the two frame elements are moved relative to each other, the guide carriage is moved within the guide rail due to the connection of the extension scissor mechanism to both the first and second frame elements. To ensure controlled movement of the frame elements relative to each other, a defined braking force should act between the guide carriage and the guide rail, at least temporarily. For this purpose, a braking element assembly is arranged on the guide carriage. The braking element assembly has at least one braking element, preferably several. It can be arranged in at least the release position and the braking position.In the release position, the braking element assembly is arranged such that it allows the guide carriage to move relative to the guide rail. In the braking position, however, it engages forcefully with the guide rail to brake the guide carriage relative to the guide rail.

[0017] In other words, the brake element arrangement between the guide carriage and the guide rail exerts a braking force, with the braking force corresponding to a smaller first braking force in the release position and a larger second braking force in the braking position. For example, in the release position, the brake element arrangement is spaced away from the release rail, so that the first braking force is zero. In the braking position, the brake element arrangement engages the guide rail to exert the non-zero second braking force. The second braking force is dimensioned, for example, such that the two frame elements are fixed relative to each other, in particular until a certain force acting between the frame elements is exceeded. The brake element arrangement interacts with the guide rail by frictional engagement, in particular exclusively by frictional engagement.Preferably, the brake element arrangement is designed such that in none of its positions is there a positive locking connection between it and the guide rail, i.e., a purely force-locking connection is implemented throughout.

[0018] The scissor mechanism is equipped with a connecting rod for actuating the brake element assembly, i.e., for moving it from the release position towards the braking position and / or vice versa. The connecting rod is rotatably mounted about the axis of rotation. The connecting rod can be positioned relative to the axis of rotation in at least the release angular position and the braking angular position. It is designed such that, in the release angular position, it releases the brake element assembly for movement towards the release position. In the braking angular position, however, it forces the brake element assembly towards the braking position, specifically into the braking position.

[0019] The connecting rod is, or can be, connected to the drive rod via the coupling mechanism. The drive rod is preferably part of the aforementioned fitting. It can also be part of the stay mechanism, but this is optional. The connecting rod is preferably connected to the drive mechanism via the drive rod, and the drive mechanism is then preferably connected to the operating element of the building locking device. The drive rod is preferably mounted on the building locking device so that it can be moved linearly. In this case, the coupling mechanism is designed such that a linear movement of the drive rod is converted into a rotary movement of the connecting rod about the axis of rotation.

[0020] In the braking position, the connecting rod interacts with the brake element assembly within the actuating range. The actuating range is defined as the axial length of the connecting rod relative to the axis of rotation. Within this range, the connecting rod has an actuating surface which, at least in the braking position, rests against the brake element assembly and forces it towards its braking position. The actuating surface, viewed in cross-section relative to the axis of rotation, has a shape or outer contour that ensures reliable braking of the guide carriage relative to the guide rail and allows for the adjustment or readjustment of the braking force. For this purpose, the actuating surface, viewed in cross-section, has a curvature with a continuously changing radius of curvature.The connecting rod is therefore not round in the actuation area.

[0021] The curvature extends circumferentially with respect to the axis of rotation over at least a portion of the connecting rod. The curvature has a non-zero radius of curvature throughout. The radius of curvature changes continuously along the curvature, i.e., without discontinuities. Preferably, the radius of curvature increases or decreases continuously and without interruption, thus exhibiting a gradient circumferentially along the curvature that is either consistently greater than zero or consistently less than zero. Due to the changing radius of curvature, the speed at which the brake element assembly is moved from the release position to the braking position depends on the rotational angular position of the connecting rod, given a specific angular velocity of the connecting rod.

[0022] For example, the radius of curvature is selected such that, for a given angular velocity of the connecting rod, the speed increases the further the connecting rod's rotational position is from the release position and the closer it is to the braking position. Preferably, the curvature and its radius of curvature are selected such that, for a given or constant angular velocity of the connecting rod, the speed of the brake element assembly increases continuously with the rotational position, for example, starting from the release position or an angle between the release and braking positions, up to the braking position.

[0023] This means that the braking force, which is generated by the brake element arrangement between the guide carriage and the guide rail, does not change uniformly with the angle of rotation of the connecting rod, but rather changes depending on the angle of rotation of the connecting rod. The change in braking force is continuous, i.e., without any abrupt changes. In particular, it is not intended that the displacement speed of the brake element arrangement or the braking force change abruptly at a specific angle of rotation of the connecting rod; instead, with a uniform change in the angle of rotation, a continuous and correspondingly seamless change in the displacement speed or braking force is achieved.

[0024] The actuating surface is particularly advantageously designed such that, in the braking angular position, and especially in every angular position of the connecting rod in which the actuating surface forces the brake element assembly towards the braking position, a restoring torque directed towards the release angular position acts on the connecting rod. Due to the displacement of the brake element assembly towards the braking position, a restoring force is present, which is directed towards displacing the brake element assembly towards the release position. Since the connecting rod forces the brake element assembly towards the braking position, the restoring force causes a restoring torque to act on the connecting rod about its axis of rotation, which forces the connecting rod from the direction of the braking angular position towards the release angular position.This restoring torque is preferably different from zero in every rotational angular position occurring during normal operation of the scissor mechanism, in which the connecting rod pushes the brake element assembly towards the braking position. This is particularly the case in the braking rotational angular position of the connecting rod.

[0025] Preferably, the actuating surface is not designed in such a way that a dead center exists, beyond which the connecting rod and the brake element assembly engage in a self-locking manner. Rather, the interaction between the connecting rod and the brake element assembly is consistently non-self-locking. This design of the scissor mechanism allows, firstly, for easy operation of the building locking device, since the holding force acting between the frame elements can be plausibly and verifiably adjusted, and secondly, the braking force between the brake element assembly and the guide rail can be adjusted or readjusted.

[0026] A further development of the invention provides that the connecting rod is designed as a torsion bar, which is arranged directly adjacent to the coupling mechanism at a first angle of rotation and in the axial direction with respect to the axis of rotation in overlap with the brake element assembly at a second angle of rotation. Due to its design as a torsion bar, the connecting rod is rotatable, i.e., elastically designed. This means that its angle of rotation can change, or at least temporarily changes, along its axial extent with respect to the axis of rotation. Accordingly, the angle of rotation that the connecting rod exhibits directly adjacent to the coupling mechanism is referred to as the first angle of rotation, and the angle of rotation that it exhibits in the axial direction in overlap with the brake element assembly is referred to as the second angle of rotation.

[0027] When the connecting rod is in the release position, it is preferably completely relaxed, and in particular, it is spaced away from the brake element assembly. In this case, the first and second angles of rotation are preferably the same or at least have a fixed relationship to each other, which changes, for example, with the increasing age of the connecting rod, especially due to slight age-related plastic deformation. If, on the other hand, the connecting rod interacts with the brake element assembly to force it towards the braking position, the first and second angles of rotation differ from each other because the connecting rod is twisted. This produces the aforementioned restoring torque.

[0028] In the release position, the first and second angles of rotation each have first values, which can differ from each other. In the braking position, the first and second angles of rotation have second values; these, too, can differ from each other. The design of the connecting rod as a torsion bar ensures that, during normal operation of the scissor mechanism, plastic deformation of the connecting rod is avoided, and instead, purely elastic deformation occurs. Furthermore, this design allows for the aforementioned adjustment or readjustment of the braking force.

[0029] A further development of the invention provides that the connecting rod has bearing areas at its ends for support and, between the bearing areas, the actuating area and a torsion area. In a relaxed state of the connecting rod, the torsion area has a cross-section that differs from, and is in particular smaller than, the cross-section of, the actuating area. The bearing areas, the actuating area, and the torsion area are understood to be regions of the connecting rod viewed axially with respect to the axis of rotation. The bearing areas serve to rotatably support the connecting rod. They are spaced apart from one another and accommodate the actuating area and the torsion area between them.

[0030] In the actuating area, the connecting rod has an actuating surface designed and configured for at least temporary contact with the brake element assembly. In at least one rotational position of the connecting rod, the actuating area rests against the brake element assembly and forces it towards the braking position. The torsion area, on the other hand, is designed such that the connecting rod exhibits a certain elasticity in the circumferential direction. For this purpose, it has a torsion area cross-section that differs from the actuating area cross-section. Preferably, it is consistently smaller than the latter. In cross-section, the actuating area of ​​the connecting rod thus extends radially beyond the torsion area, at least in some sections. Due to the different cross-sections of the actuating area and the torsion area, they exhibit different torsional strengths.In particular, the torsional strength of the torsion zone is lower than the torsional strength of the actuation zone. Preferably, the torsional strength of the torsion zone is at most 80%, at most 60%, or at most 50% of the torsional strength of the actuation zone.

[0031] The torsion zone allows the connecting rod to adapt to the building locking device. In particular, it enables a defined relationship between the operating force applied to the operating element of the building locking device and the braking force acting between the guide carriage and the guide rail. This is especially true if the torsion zone is arranged between the coupling mechanism and the actuating area. Particularly preferred is a continuous and steady transition between the torsion zone and the actuating area, viewed axially with respect to the axis of rotation. Thus, the cross-section of the connecting rod does not change abruptly between the actuating area and the torsion zone, but rather changes steadily and continuously.This means that even when the connecting rod is in the braking rotation position, the guide carriage, which is axially aligned with the torsional area, can be displaced towards the actuation area. In this case, the braking force acting between the guide carriage and the guide rail increases continuously due to the constantly changing cross-section until the brake element assembly is in the braking position.

[0032] The torsion zone ensures that the guide carriage can be moved even when the connecting rod is in the braking rotation position, as long as the brake element assembly is axially aligned with the torsion zone. For example, the torsion zone is arranged and dimensioned such that the building locking device can be moved from its closed position, with a smaller initial braking force acting between the brake element assembly and the guide rail. Once a certain initial opening angle is reached, and in particular only then, the brake element assembly comes into contact with the actuating area, thus increasing the braking force to a larger secondary braking force.When the building locking device reaches a second opening angle that is larger than the first opening angle, the brake element arrangement is forced from the actuation area into its braking position, so that the braking force corresponds to a larger second braking force.

[0033] A further development of the invention provides that the actuating surface has a flat release surface to which a curved contact surface adjoins. Viewed circumferentially with respect to the axis of rotation, the actuating surface comprises at least the release surface and the contact surface. The release surface is flat, at least in cross-section, whereas the contact surface—also at least in cross-section—has a curvature, i.e., it is curved circumferentially. The release surface is arranged such that, in the release rotational position of the connecting rod, it allows the brake element assembly to move into the release position, and is also spaced apart from the brake element assembly when it is in the release position.

[0034] Preferably, when the connecting rod is in the release rotation position, the release surface runs parallel, or preferably parallel at a distance, to a counter-contact surface of the brake element assembly. The contact surface rests against this counter-contact surface when the connecting rod is in the corresponding rotation position, particularly in its braking rotation position, in order to force the brake element assembly towards the braking position. Preferably, the release surface and the contact surface transition smoothly into one another in cross-section. This means that the radius of curvature of the contact surface on a side of the contact surface directly adjacent to the release surface has a value that ensures such a smooth transition. Starting from this value, the radius of curvature then changes continuously in the circumferential direction. With this design of the release mechanism, the advantages already mentioned are achieved.

[0035] A further development of the invention provides that the release surface is the first release surface, and a second, planar release surface is located at a distance from the first release surface, in particular parallel to the first release surface, with the curvature extending from the first release surface to the second release surface. The two release surfaces, i.e., the first release surface and the second release surface, are arranged on opposite sides of the connecting rod in cross-section. They run parallel to each other and are each planar. The curvature adjoins the first release surface on one side and the second release surface on the other.

[0036] The curvature extends continuously or discontinuously from the first release surface and transitions continuously or discontinuously into the second release surface. For example, it extends continuously from at least the first release surface, whereas its transition into the second release surface can be continuous or discontinuous. However, it is particularly preferred that the curvature, or rather the contact surface, extends continuously from both the first and second release surfaces, or transitions continuously into both. Due to the changing radius of curvature, the two release surfaces are preferably arranged parallel to each other. The advantages described are achieved in a structurally simple manner with such a design of the opening scissor.

[0037] A further development of the invention provides that the connecting rod is asymmetrical in cross-section in the actuation area and / or symmetrical in the torsional area. The asymmetrical design of the connecting rod in the actuation area is achieved in particular by the continuously changing radius of curvature. The asymmetry of the connecting rod in the actuation area is present especially with respect to an imaginary plane that completely encompasses the axis of rotation. However, it can be provided that the connecting rod is point-symmetrical in cross-section with respect to the axis of rotation or a point where the axis of rotation intersects a cross-sectional plane. For example, the connecting rod has, in cross-section, two release surfaces which are connected to each other on opposite sides via contact surfaces.

[0038] In addition to the contact surface already mentioned, which can also be referred to as the first contact surface, there is a further contact surface, which is also referred to as the second contact surface. Both contact surfaces have a curvature with a continuously changing radius of curvature. The contact surface design is preferably applicable to both contact surfaces. The two contact surfaces are located on opposite sides of the connecting rod, in particular on opposite sides of the axis of rotation. Preferably, both contact surfaces have identical curvatures with identical profiles of the radius of curvature, which, however, are mirrored, for example. Thus, the first contact surface has the profile of the radius of curvature originating from the first release surface, and the second contact surface has the same profile of the radius of curvature originating from the second release surface.

[0039] Additionally or alternatively, the connecting rod is symmetrical in the torsion region, preferably with respect to at least one imaginary plane that completely encompasses the axis of rotation of the connecting rod. Preferably, the connecting rod is symmetrical in the torsion region with respect to two imaginary planes that are perpendicular to each other and each completely encompasses the axis of rotation. At a minimum, however, the connecting rod is point-symmetrical with respect to a point on the axis of rotation in the torsion region. This configuration also serves to achieve the advantages already mentioned.

[0040] A further development of the invention provides that a first of the bearing areas for manufacturing the coupling mechanism is designed as an adjusting area in which the coupling rod has a consistently constant cross-section in the axial direction with respect to the axis of rotation and is twisted within itself, wherein the adjusting area is arranged in a cam recess of a linearly displaceable adjusting cam of the coupling mechanism, which is connected or connectable to the drive rod. The coupling mechanism comprises the adjusting area of ​​the coupling rod and the adjusting cam. In the adjusting area, the coupling rod has at least an approximately stadium-shaped cross-section, i.e., it is designed with two parallel sides, which are connected to each other on both sides by a partial circle, in particular a semicircle.Adjacent cross-sections of the connecting rod in the adjustment area are twisted relative to each other in the circumferential direction, so that the connecting rod is twisted in the adjustment area. The cross-sections are otherwise preferably congruent to each other, so that the connecting rod has consistently identical cross-sections across the first bearing area, which are twisted relative to each other in the circumferential direction.

[0041] The adjusting section is housed within the adjusting mechanism, which features a corresponding recess. The adjusting section engages with the recess, specifically, it extends completely through it. The recess has an edge, particularly a continuous, closed edge, formed by the adjusting mechanism. The recess is dimensioned such that its edge rests against the adjusting section in at least one position of the adjusting mechanism. The adjusting section and the adjusting mechanism are designed such that a linear displacement of the adjusting mechanism causes the adjusting section, and consequently the connecting rod, to rotate around the axis of rotation. This design implements the coupling mechanism with a particularly small number of individual components.

[0042] A further development of the invention provides that the connecting rod and the actuating cam are adjustable relative to each other in the axial direction with respect to the axis of rotation by means of an actuating device. The adjustment of the connecting rod and actuating cam is carried out particularly in the axial direction, so that ultimately the distance between the connecting rod and the coupling rod is changed. In other words, the position of the coupling rod and the actuating cam relative to each other is changed while the position of the connecting rod remains constant, so that – again, with the position of the connecting rod remaining constant – the rotational angle of the coupling rod also changes. This allows the release rotational angle and the braking rotational angle to be adjusted in a simple manner, resulting in a changed preload of the coupling rod.

[0043] A further development of the invention provides that a second bearing area is rotatably mounted in a rotary bearing with respect to the axis of rotation and axially fixed. The second bearing area is located opposite the first bearing area in the axial direction with respect to the axis of rotation. The rotary bearing allows the second bearing area to be rotatably mounted about the axis of rotation, but fixed axially with respect to the axis of rotation. This axial fixing enables the conversion of the linear movement of the actuating cam into the rotary movement of the coupling shaft by means of the coupling mechanism in a particularly simple manner.

[0044] A further development of the invention provides that the pivot bearing is either fixed relative to the guide rail or mounted so that it can be displaced relative to the guide rail in the direction of the axis of rotation. In the case of a fixed pivot bearing, the connecting rod is also fixed axially relative to the guide rail. Any adjustment of the extension scissor mechanism can therefore only be achieved by moving the drive rod and the adjusting cam relative to each other. If, on the other hand, the pivot bearing is mounted so that it can be displaced relative to the guide rail, the connecting rod is also adjustable axially. By moving the pivot bearing, the connecting rod is displaced relative to the adjusting cam while the position of the adjusting cam relative to the guide rail remains constant, thus again resulting in an adjustment of the preload. This design also allows for easy adjustment of the extension scissor mechanism.It may be provided that the adjusting mechanism for the connecting rod and adjusting cam is implemented, but not the adjustability of the pivot bearing relative to the guide rail, or vice versa. However, it may also be provided that both the adjusting mechanism and the pivot bearing relative to the guide rail are present. This achieves a particularly wide adjustment range.

[0045] A further development of the invention provides that a damper, preferably made of an elastic material, is arranged between the rotary bearing and the guide carriage and is penetrated by the connecting rod. The damper prevents direct contact between the guide carriage and the rotary bearing. It consists of a soft, preferably elastic material, for example, an elastomer. The damper is arranged on the connecting rod and is penetrated by the connecting rod. For example, the damper is held by the connecting rod. For this purpose, the damper preferably completely and continuously surrounds the connecting rod in cross-section. With the aid of the damper, particularly smooth operation and a high-quality appearance of the scissor mechanism are ensured.

[0046] A further development of the invention provides that the brake element arrangement comprises one brake element or several brake elements spaced apart from one another. The brake element arrangement can have only a single brake element. Preferably, however, it has several brake elements or even several pairs of brake elements, each pair comprising two brake elements arranged on opposite sides of the connecting rod and pushed apart by the connecting rod in the braking rotation position. In the case of several pairs of brake elements, these are preferably spaced apart from one another, namely in the axial direction with respect to the axis of rotation. The described configuration enables reliable braking of the guide carriage with respect to the guide rail.

[0047] A further development of the invention provides that the brake elements are connected to one another via a retaining bridge, wherein the retaining bridge preferably has dimensions that are smaller than the distance between the brake elements in the braking position of the brake element arrangement. The brake elements are initially connected to one another via the retaining bridge. For example, the retaining bridge is manufactured integrally with the brake elements and of the same material. In particular, the retaining bridge is in the form of a foil hinge between the brake elements, so that the brake elements are held together in a movably articulated manner by means of the retaining bridge.

[0048] The retaining bracket primarily facilitates easy assembly. The brake elements, along with the retaining bracket, are mounted on the guide carriage. The guide piece has dimensions that are larger than the distance between the brake elements in the release position, but smaller than their distance in the braking position. This means that the retaining bracket is separated when the brake elements are first moved into the braking position, so that the brake elements are subsequently no longer connected to each other. The retaining bracket thus acts as a predetermined separation point. In any case, it simplifies the assembly of the scissor mechanism.

[0049] A further development of the invention provides that the brake element assembly is positively connected to the guide slide, in particular held with play in a displacement direction between the release position and the braking position, and is displaceable in a mounting direction angled relative to the displacement direction. Such a design again enables simple assembly of the brake element assembly. In particular, the brake element assembly is applied to the guide slide in the mounting direction, thereby establishing a positive connection between the brake element assembly and the guide slide. The positive connection is such that displacement of the brake element assembly relative to the guide slide is permitted in the disassembly direction, but only with the specified play in the displacement direction. Again, simple assembly is achieved using the described design.

[0050] A further development of the invention provides that the guide carriage and the brake element assembly have a common guide recess into which a guide projection of the guide rail engages in a form-fitting manner to hold the guide carriage and the brake element assembly in the guide rail. The guide projection extends along a longitudinal center axis of the guide rail, preferably continuously. For example, it extends over the entire length of the guide rail. To mount the scissor mechanism, the brake element assembly is attached to the guide carriage, and the guide carriage and the brake element assembly are inserted together into the guide rail such that the guide projection engages in its guide recess. This ensures that both the guide carriage and the brake element assembly are reliably held together on the guide rail.

[0051] The invention further relates to a building locking device, comprising a projection scissor, in particular a projection scissor according to the embodiments within the scope of this description, wherein the projection scissor has a guide rail attached to a frame element of the building locking device, a guide carriage displaceably mounted in the guide rail, and a projection rail rotatably articulated to the guide carriage, wherein a brake element arrangement is arranged on the guide carriage which, in a release position, releases the guide carriage for displacement relative to the guide rail and, in a braking position, interacts forcefully with the guide rail to brake the guide carriage, and wherein the brake element arrangement interacts with a connecting rod, rotatably mounted about an axis of rotation, which is connected or connectable to a drive rod via a coupling mechanism.which releases the brake element assembly in a release rotational angle position for movement towards the release position and forces it towards the braking position in a braking rotational angle position. It is provided that the connecting rod has an actuating surface in an actuating area, which interacts with the brake element assembly to move it towards the braking position and, in cross-section, has a curvature with a continuously changing radius of curvature.

[0052] The advantages of such a design for the building locking device and the hinge mechanism have already been mentioned. Both the building locking device and the hinge mechanism can be further developed as described in this document, and reference is made to these details.

[0053] The features and combinations of features described in the description, in particular those described in the following figure description and / or shown in the figures, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention. Thus, embodiments that are not explicitly shown or explained in the description and / or the figures, but which emerge from or can be derived from the explained embodiments, are also to be considered as encompassed by the invention.

[0054] The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. The drawing shows: Figure 1 is a schematic representation of a building locking device with a stay arm, Figure 2 is a schematic detail of the stay arm, Figure 3 is a schematic sectional view of the stay arm, Figure 4 is another schematic sectional view of the stay arm, Figure 5 is a schematic representation of the stay arm in the area of ​​a linkage mechanism, Figure 6 is a schematic detail of the linkage mechanism, Figure 7 is a schematic view of the building locking device, in which the stay arm and a connecting rod of a fitting are visible, Figure 8 is a schematic representation of the stay arm in the area of ​​an adjusting device, Figure 9 is a schematic representation of the stay arm in the area of ​​a pivot bearing for supporting a connecting rod, and Figure 10 is a schematic representation of a guide slide, a brake element arrangement and the connecting rod of the stay arm.

[0055] The Figure 1Figure 1 shows a schematic representation of a building locking device 1, which is designed as a facade window and has a first frame element 2 designed as a frame and a second frame element 3 designed as a sash. The frame elements 2 and 3 are pivotally or rotatably mounted to one another about a pivot axis 4. For actuation of the building locking device 1, it has a fitting 5, of which a control element 6, a gearbox 7 and several drive rods 8 are shown here, which in the embodiment shown here are connected to each other via a corner drive 9.

[0056] The fitting 5 also features a scissor stay 10. This scissor stay has a guide rail 11, which is attached to the second frame element 3. For example, it sits in a frame groove 12 (not shown) produced in the second frame element 3. A guide carriage 13 is mounted in the guide rail 11 so as to be linearly displaceable, namely in the direction of a longitudinal center axis 40 of the guide rail 11. A scissor stay 15 is rotatably mounted on the guide carriage 13 about a first axis of rotation 16. On its side facing away from the guide carriage 13, the scissor stay 15 is rotatably mounted on the first frame element 2 about a second axis of rotation 17.

[0057] A brake element assembly 18 (not shown here) is displaceably arranged, in particular mounted, on the guide carriage 13. When in a release position, it releases the guide carriage 13 for movement. In a braking position, however, it exerts a braking force between the guide carriage 13 and the guide rail 11, which counteracts the movement of the guide carriage 13. The brake element assembly 18 is actuated by means of a connecting rod 19, which is drive-connected to the drive rod 8 or one of the drive rods 8 via a coupling mechanism 20. On its side opposite the coupling mechanism 20, the connecting rod 19 is rotatably mounted by means of a pivot bearing 21, namely about an axis of rotation 22, which in the illustrated embodiment coincides with and / or runs parallel to the longitudinal center axis 14.A damper 23 is arranged between the rotary bearing 21 and the guide carriage 13 to prevent the guide carriage 13 from striking the rotary bearing 21.

[0058] The Figure 2Figure 1 shows a schematic detail of the scissor mechanism 10. It can be seen that a coupling element 24 is connected to the connecting rod 19 via the linkage 20. The coupling element 24 is designed and configured to be connected to the drive rod 8. A fastening element 25, which has, for example, a fastening thread or a bayonet fitting, serves to connect it to the drive rod 8. Viewed axially, the connecting rod 19 has an actuating section 26 located between two bearing sections 27 and 28. The bearing section 27 is housed in a gearbox 29 of the linkage 20 and is therefore not shown here. Similarly, the bearing section 28 is housed in a bearing housing 30 of the rotary bearing 21 and is also not shown. Viewed axially, the bearing sections 27 and 28 accommodate the actuating section 26 and a torsional section 31 between them.In the torsion zone 31, the connecting rod 19 has a smaller cross-section than in the actuation zone 26. The torsion zone 31 preferably adjoins the bearing zone 27 directly. It is designed such that when the guide slide 13 is arranged in overlap with the torsion zone 31, there is a lower braking force between the guide slide 13 and the guide rail 11 than when the guide slide 13 is arranged in overlap with the actuation zone 26.

[0059] The Figure 3Figure 1 shows a schematic cross-sectional view of the scissor mechanism 10. It can be seen that the brake element assembly 18 has at least one pair of brake elements 32 with two opposing brake elements 33 and 34. The brake elements 33 and 34 are shown here in their release position; that is, they do not interact with the guide rail 11 to generate the braking force. The connecting rod 19 is shown in a release rotational position, in which it releases the brake element assembly 18, or rather the brake elements 33 and 34, for movement into their release position, i.e., it does not force them in the direction of the braking position. By rotating the connecting rod 19 in the direction of the arrow 35 shown, the brake element assembly 18 is forced against the guide rail 18 in such a way that a non-zero braking force is generated.

[0060] The actuation area 26 and the torsion area 31 of the connecting rod 19 are indicated. It can be seen that the connecting rod 19 has an actuation surface 36 in the actuation area 26. This surface has a contact surface 37 which, when the connecting rod 19 is in a corresponding rotational position, interacts with a contact surface of the brake element assembly 18 or the brake element 33. The contact surface 37 is curved with a continuously changing radius of curvature. In particular, the connecting rod 19, or rather the actuation surface 36, has, in addition to the contact surface 37, a further contact surface 38 opposite the contact surface 37, which actuates another contact surface of the brake element 34. The contact surfaces 37 and 38 connect opposing release surfaces 39 and 40.The contact surfaces 37 and the release surface 39 form a first part of the actuation surface 36, the contact surface 38 and the release surface 40 a second part of the actuation surface 36.

[0061] The release surfaces 39 and 40 are arranged parallel to each other and preferably have a smaller distance between them than the brake elements 33 and 34 in their release position. In the torsion zone 31, the connecting rod 19 also has the release surfaces 39 and 40; these are continuous between the actuation zone 26 and the torsion zone 31. However, the torsion zone 31 is smaller than the actuation zone 26 in at least one direction. In principle, the dimensions of the connecting rod 19, viewed in cross-section, are smaller in an imaginary plane that completely encompasses the axis of rotation 22 than in a second imaginary plane perpendicular to it and also completely encompassing the axis of rotation 22. For example, the dimensions in the first imaginary plane are larger by a factor of at least 1.5, at least 2.0, or at least 2.5 than in the second imaginary plane.This applies in particular to area of ​​activity 26.

[0062] The Figure 4 Figure 1 shows a schematic cross-sectional view of the scissor arm 10. In addition to what has already been explained, it now becomes clear that the brake elements 33 and 34 of the brake element pair 32 are connected to each other by means of a retaining web 41. This web is preferably designed such that it breaks when the brake elements 33 and 34 are moved apart, i.e., when they are moved into their braking position. It serves to simplify the assembly of the brake element assembly 18, in particular until the brake element assembly 18, together with the guide carriage 13, is inserted into the guide rail 11.

[0063] The Figure 5Figure 1 shows a schematic detail of the scissor mechanism 10 in the area of ​​the coupling mechanism 20. The bearing area 27 is designed as an adjusting area 42, which is received in a cam recess 43 of an adjusting cam 44 of the coupling mechanism 20. The adjusting cam 44 is connected to the drive rod 8, in particular via the coupling element 24. It can be seen that the connecting rod 19 is twisted within its adjusting area 42. Due to this design, a linear displacement of the adjusting cam 44 causes a rotational movement of the connecting rod 19 about its axis of rotation 22.

[0064] The Figure 6Figure 1 shows a detailed representation of the coupling mechanism 20. The illustration shows that the coupling rod 19 has a consistently uniform cross-section within the adjustment range 42, although adjacent cross-sections are rotated relative to each other in the circumferential direction with respect to the axis of rotation 22. Due to this design, the linear displacement of the adjustment cam 44 is effectively converted into the rotary movement of the coupling rod 19.

[0065] The Figure 7Figure 1 shows a schematic detail of frame element 3. The frame groove 12, in which the connecting rod 8 is partially received and linearly guided, is now visible. It is also shown how the connecting rod 8 is attached to the coupling element 24 by means of the fastening element 25. Furthermore, it is evident that an adjusting device 45 is located between the coupling element 24 and the coupling gear 20 or the adjusting cam 44. The adjusting device 45 allows the coupling element 24 and the adjusting cam 44 to be adjusted axially relative to each other, for example, by using an adjusting screw 46. This allows the adjusting cam 44 to be adjusted axially, and thus the connecting rod 19 circumferentially, without relocating the connecting rod 8 or the coupling element 24. This enables easy adjustment of the scissor arm 10.

[0066] The Figure 8Figure 1 shows another schematic representation of the scissor mechanism 10 in the area of ​​the coupling mechanism 20. A positioning slide 47 can be seen, which can be displaced relative to the coupling element 24 by means of the adjusting screw 46. The positioning slide 47 is guided into the gearbox housing 29 and coupled to the positioning cam 44; for example, it is manufactured as a single piece with the positioning cam 44.

[0067] The Figure 9 Figure 1 shows a schematic representation of the extension scissor 10 in the area of ​​the pivot bearing 21. The connecting rod 19 is rotatably mounted in the pivot bearing 21 with its bearing area 28 and is fixed in the axial direction. In the illustrated embodiment, however, the pivot bearing 21 is axially displaceable, namely as indicated by the double arrow 48. A further adjusting screw 49 serves to displace the pivot bearing 21. This allows for a very wide range of adjustability of the extension scissor 10.

[0068] The Figure 10Figure 1 shows a schematic representation of the guide slide 13, the brake element pair 32, and the connecting rod 19. It is evident that, in addition to the brake element pair 32, there is a further brake element pair 32, which is arranged at a distance from the first brake element pair 32. It is also evident that the brake elements 33 and 34 are positively guided on the guide slide 13. This allows for particularly simple assembly. Specifically, it is intended that the brake elements 33 and 34 are mounted on the guide slide 13, with the brake elements 33 and 34 being connected to each other via the retaining web 41 (not visible here). Subsequently, the brake elements 33 and 34, together with the guide slide 13, are brought together by the connecting rod 19. This ensures that the brake elements 33 and 34 are held captive by the retaining web 41. REFERENCE MARK LIST

[0069] 1 Building locking device 21 Frame element 32 Frame element 4 Swivel axis 5 Fitting 6 Operating element 7 Gearbox 8 Drive rod 9 Corner deflection 10 Extension scissor 11 Guide rail 12 Frame groove 13 Guide carriage 14 Longitudinal center axis 15 Extension rail 16 1st pivot axis 17 2nd pivot axis 18 Brake element assembly 19 Connecting rod 20 Coupling gearbox 21 Swivel bearing 22 Pivot axis 23 Damper 24 Coupling element 25 Fastening element 26 Actuation area 27 Bearing area 28 Bearing area 29 Gearbox housing 30 Bearing housing 31 Torsion area 32 Brake element pair 33 Brake element 34 Brake element 35 Arrow 36 Actuation surface 37 Contact surface 38 Contact surface 39 Release surface 40 Release area 41 Holding bracket 42 Adjustment range 43 Scene recess 44 Adjustment scene 45 Adjustment device 46 Adjusting screw 47 Adjustment slide 48 Double arrow 49 Adjusting screw

Claims

1. Extension scissor (10) for a building locking device (1), comprising a guide rail (11) attachable to a frame element (2, 3) of the building locking device (1), a guide carriage (13) displaceably mounted in the guide rail (11), and an extension rail (15) rotatably articulated to the guide carriage (13), wherein a brake element arrangement (18) is arranged on the guide carriage (13), which in a release position releases the guide carriage (13) for displacement relative to the guide rail (11) and in a braking position engages forcefully with the guide rail (11) to brake the guide carriage (13), and wherein the brake element arrangement (18) interacts with a connecting rod (19) which is or can be connected to a drive rod (8) via a coupling mechanism (20) and is rotatably mounted about an axis of rotation (22).which releases the brake element arrangement (18) in a release rotational angle position for displacement in the direction of the release position and in a brake rotational angle position forces it in the direction of the brake position, characterized by the fact that The connecting rod (19) in an actuation area (26) has an actuation surface (36) which cooperates with the brake element arrangement (18) in the direction of the brake position and has a curvature with a continuously changing radius of curvature in cross-section.

2. Display shears according to claim 1, characterized by the fact that the connecting rod (19) is designed as a torsion rod, which is arranged immediately adjacent to the coupling gear (20) under a first angle of rotation and in axial direction with respect to the axis of rotation (22) in overlap with the brake element arrangement (18) under a second angle of rotation.

3. Display shears according to one of the preceding claims, characterized by the fact thatthe connecting rod (19) has bearing areas (27, 28) at its ends for bearing and between the bearing areas (27, 28) the actuation area (26) as well as a torsion area (31) which in a relaxed state of the connecting rod (19) has a torsion area cross-section which is different from an actuation area cross-section of the actuation area (26).

4. Display shears according to one of the preceding claims, characterized by the fact that the actuation surface (36) has a flat release surface (39) to which a contact surface (37) having a curvature is connected.

5. Display shears according to one of the preceding claims, characterized by the fact that the release area (39) is the first release area (39) and a level second release area (40) is spaced away from the first release area (39), the curvature extending from the first release area (39) to the second release area (40).

6. Display shears according to one of the preceding claims, characterized by the fact that the connecting rod (19) is asymmetrical in cross-section in the actuation area (26) and / or symmetrical in the torsion area (31).

7. Display shears according to one of the preceding claims, characterized by the fact that A first of the bearing areas (27, 28) for the manufacture of the coupling mechanism (20) is designed as an adjusting area (42) in which the connecting rod (19) has a continuously constant cross-section in the axial direction with respect to the axis of rotation (22) and is twisted in itself, wherein the adjusting area (42) is arranged in a cam recess (43) of a linearly displaceable adjusting cam (44) of the coupling mechanism (20) which is connected or connectable to the drive rod (8).

8. Display shears according to one of the preceding claims, characterized by the fact thatthe connecting rod (8) and the actuating cam (44) are adjustable relative to each other in the axial direction with respect to the axis of rotation (22) by means of an actuating device (45).

9. Display shears according to one of the preceding claims, characterized by the fact that a second of the bearing areas (27, 28) is rotatable with respect to the axis of rotation (22) and axially fixed in a rotary bearing (21).

10. Display shears according to one of the preceding claims, characterized by the fact that the rotary bearing (21) is fixed with respect to the guide rail (11) or is mounted so as to be displaceable with respect to the guide rail (11) in the direction of the axis of rotation (22).

11. Display shears according to one of the preceding claims, characterized by the fact that A damper (23) is arranged between the rotary bearing (21) and the guide slide (13), which is penetrated by the connecting rod (19).

12. Display shears according to one of the preceding claims, characterized by the fact thatthe brake element arrangement (18) comprises a brake element (33, 34) or several brake elements (33, 34) spaced apart from each other.

13. Display shears according to one of the preceding claims, characterized by the fact that the brake elements (33, 34) are connected to each other via a retaining bridge (41), wherein the retaining bridge (41) preferably has dimensions that are smaller than the distance between the brake elements (33, 34) in the braking position of the brake element arrangement (18).

14. Display shears according to one of the preceding claims, characterized by the fact that the brake element assembly (18) is positively connected to the guide slide (13).

15. Building locking device (1), comprising a projection scissor (10), in particular a projection scissor (10) according to one or more of the preceding claims, wherein the projection scissor (10) has a guide rail (11) attached to a frame element (2, 3) of the building locking device (1), a guide carriage (13) displaceably mounted in the guide rail (11) and a projection rail (15) rotatably articulated to the guide carriage (13), wherein a brake element arrangement (18) is arranged on the guide carriage (13), which in a release position releases the guide carriage (13) for displacement relative to the guide rail (11) and in a braking position engages forcefully with the guide rail (11) to brake the guide carriage (13), and wherein the brake element arrangement (18) is connected or connectable to a drive rod (8) via a coupling mechanism (20),a connecting rod (19) rotatably mounted about a pivot axis (92), which in a release rotational angle position releases the brake element arrangement (18) for displacement in the direction of the release position and in a braking rotational angle position forces it in the direction of the braking position, , characterized by the fact that The connecting rod (19) in an actuation area (26) has an actuation surface (36) which cooperates with the brake element arrangement (18) in the direction of the brake position and has a curvature with a continuously changing radius of curvature in cross-section.

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