EP3670805A1 - End fitting for a push chain - Google Patents

Abstract

The invention relates to an end fitting (4) for the free end region (18) of a multi-link push chain (2) of a chain push drive (1) that can be stiffened in overrun operation for an opening lock (5) of a building opening. The end fitting (4) has an attachment (19) which can be fastened to a closure part (6, 7) of the opening closure (5) and a chain receptacle (21) for the end region (18) as well as a force / moment transmitter (23) which holds the push chain (2) forces into a rigid back bend (12) in overrun mode. The attachment means (19) and the chain receptacle (21) are connected to one another so as to be pivotable relative to one another about an axis of rotation (25), the force / moment transmitter (23) connecting the attachment means (19) and the chain receptacle (21) in overrun mode relative to one another about the axis of rotation (25) moves.

Description

The invention relates to an end fitting for a push chain, a chain push drive and an opening lock with the features in the independent claims.

Chain push drives for windows, doors, flaps or other opening closures of buildings are known from practice, which have a drive unit with a housing and a multi-link push chain which can be stiffened in push operation. The chain links of the push chain have chain links that are pivotally connected to one another via chain pins and their pin axes. At the free end area, the push chain has a bow-shaped mouthpiece that can be freely rotated on an end fitting. It can rotate about an axis running transversely to the chain pin. The end fitting can be mounted on a locking part of the opening lock, the housing and the drive unit of the chain slider being mounted on the other locking part. Such chain thrust drives are arranged on a main closing edge of the opening lock. The main closing edge is opposite the bearings of the opening lock.

It is the object of the present invention to show an improved chain pushing technique.

The invention solves this problem with the features in the independent claims.
The claimed chain thrust technology, ie the end fitting and the chain thrust drive, have various advantages.

The chain pushing technique can be used universally on opening locks. It can be attached and used on one main closing edge and also on the usually several secondary closing edges. The arrangement on a secondary closing edge enables larger opening angles of the opening lock for the same push chain length. The arrangement on a secondary closing edge often has less interference potential than the arrangement on a main closing edge.

The end fitting equipped with a force / torque sensor can actively force the push chain into a rigid back bend. As a result, the push chain can be stiffened reliably. This stiffening effect can also be reliably achieved when the end fitting is installed at a secondary closing edge.

A conventional push chain can be arranged on a secondary closing edge of an opening lock, e.g. a window or a flap with vertically aligned bearings or bearing axles cannot be securely stiffened. Due to its vertical chain pin axes, the outgoing push chain does not have sufficient stiffening support and buckles during push operation. Conventional push chains can be used if the dead weight of the non-stationary or moving fastener supports the push-out movement. Conventional chain thrust drives are used on flaps or windows that have bearings at the bottom with the axle bearings aligned horizontally.

The claimed active support end fitting can be installed between the end area of the push chain and a locking part of the opening lock. Installation on the stationary or transient locking part or on the frame or sash of the opening lock is possible.

The moment or force generated by the force / moment generator can be supported on the locking part of the opening lock and can be directed against the chain back of the push chain. The active end fitting can e.g. Pick up the last chain link at the free end area of the push chain and apply the force or the moment. The last chain link can be moved and in particular rotated such that the back stops of the chain links come into supportive engagement with one another and the chain assumes a supporting and stiffening back position and back bending. The stiffened push chain has a curved course, the chain back being arranged on the inside of the curve or pointing to the center of the curve. When the push chain is retracted, the curvature can be removed again under the tensile load and the push chain can be brought into an extended position.

The claimed end fitting has an attachment and a chain holder. The attachment can be mounted on a stationary or non-stationary locking part. The chain holder is used to hold the end area of the push chain. For this purpose, it can be designed in any suitable manner. In particular, it can receive an end link of the push chain in a non-positive and / or positive manner. The attachment and the chain receptacle are movable relative to one another and can be connected to one another while maintaining this relative mobility. In particular, they can be pivotally connected to one another. They can also be stored together. With a relative rotatability, the axis of rotation can be aligned parallel to the chain pin axes. There are various possible variations with a base or console / turned part for the design of the end fitting with attachment means and chain holder and turnstile.

The force / torque generator acts between the attachment and the chain mount. He can e.g. also be arranged between the attachment and the chain holder. The force / moment transmitter moves the attachment and the chain holder relative to each other in overrun operation and thereby forces the push chain into the curve and the rigid back bend.

The claimed end fitting can be connected to a chain thrust drive when it is initially equipped. The end fitting can also be retrofitted or converted to an existing, conventional chain thrust drive. The chain holder can be exchanged for the conventional bow-shaped mouthpiece.

The chain thrust drive can be adapted to the end fitting claimed. For this, e.g. the outlet opening on the housing of the chain thrust drive can be widened beyond the chain width. There may also be a run-on slope for the push chain at the chain outlet. These configurations meet the chain curvature that arises in the back bend. The push chain can run out at an angle from the housing of the chain push drive and can smoothly merge into the back bend and curvature. This can additionally promote and secure the taking of the back bend and curvature.

In traction mode, the push chain can run into the housing of the chain push drive again with an essentially vertical orientation. This adapted chain thrust drive and the end fitting form a particularly advantageous embodiment of the invention.

This configuration is also advantageous for the soft chain running, chain wear, energy consumption and chain stability. It is also advantageous here if the push chain has countersunk chain bolts which are essentially flush with the top side of the link plates or protrude only slightly above the link surface.

The claimed chain push technology can be used successfully on all types of opening locks. It does not matter whether the bearing axis of the opening lock runs vertically, horizontally or at an angle. The claimed chain pushing technology can ensure a secure stiffening of the push chain in pushing operation in all installation positions. An attachment to a secondary closing edge of an opening closure is particularly favorable. In particular, this can be an opening closure in the form of a window or a flap or door with an upright bearing axis.

Further advantageous refinements of the invention are specified in the subclaims.

The following configurations, individually or in combination, are also advantageous for the chain pushing technique claimed.
The claimed end fitting can be or can be fitted between the free end region or the last chain link of the multi-link push chain which can be stiffened in overrun mode and a locking part of the opening lock.

The attachment means and the chain receptacle of the end fitting can be connected to one another so as to be movable, in particular pivotable, in relation to one another. In particular, they can be mounted on one another in a movable, preferably pivotable, manner.

The force / torque generator can be arranged between the attachment and the chain holder. The force / torque generator can act between the attachment and the chain mount.

The force / torque generator can move the attachment and the chain holder relative to each other in overrun mode. In particular, he can twist the attachment and the chain receptacle relative to one another about said axis of rotation in overrun mode.

In the case of a movable opening closure of a building opening, for example a window, a door or a flap, the chain push drive and the end fitting can be arranged on a secondary closing edge of the opening closure.

Figur 1:

eine Draufsicht auf einen Öffnungsverschluss einer Gebäudeöffnung mit einem Kettenschubantrieb und einem Endbeschlag in einer Stirnansicht,

Figur 2 und 3:

eine Draufsicht auf den Öffnungsverschluss gemäß Pfeil II,III von Figur 1 in Schließ- und Öffnungsstellung,

Figur 4:

eine abgebrochene und vergrößerte Ansicht des Kettenschubantriebs und des Endbeschlags mit Anordnung an einer Nebenschließkante,

Figur 5:

eine abgebrochene und vergrößerte Seitenansicht des Öffnungsverschlusses gemäß Pfeil V von Figur 1,

Figur 6:

eine perspektivische Ansicht des Endbeschlags in massiver Darstellung,

Figur 7:

eine transparente Darstellung des Endbeschlags von Figur 6 und

Figur 8:

eine transparente Darstellung einer Variante des Endbeschlags von Figur 6 und 7 .

The invention is illustrated in the drawings by way of example and schematically. Show in detail:

Figure 1:

a top view of an opening closure of a building opening with a chain thrust drive and an end fitting in a front view,

Figure 2 and 3:

a plan view of the opening closure according to arrow II, III of Figure 1 in the closed and open position,

Figure 4:

a broken and enlarged view of the chain drive and the end fitting with an arrangement on a secondary closing edge,

Figure 5:

a broken and enlarged side view of the opening closure according to arrow V of Figure 1 ,

Figure 6:

a perspective view of the end fitting in a massive representation,

Figure 7:

a transparent representation of the final fitting from Figure 6 and

Figure 8:

a transparent representation of a variant of the final fitting from Figure 6 and 7 .

The invention relates to an end fitting (4) for a push chain (2) of a chain push drive (1). The invention further relates to the chain thrust drive (1) equipped with an end fitting 4). The invention also extends to an opening closure (5) of a building opening with such an end fitting (4) and a chain thrust drive (1).

Figure 1 shows an opening closure (5) for a building opening with an attached chain thrust drive (1) and an end fitting (4). Figures 2 and 3 show a plan view of the arrangement of Figure 1 acc. Arrow II, III of Figure 1 . In Figure 2 is a closed position and in Figure 3 an open position of the opening closure (5) is shown. Figure 5 shows an end view of the arrangement of Figure 1 acc. Arrow V of Figure 1 .

The opening closure (5) consists of closure parts (6, 7) which are movably connected to one another. These are, for example, a stationary frame (6) and a non-stationary or movable wing (7). One or more bearings (8) are arranged between the closure parts (6, 7). In the embodiment shown, these have a vertical alignment of their bearing axes. In the example shown, the opening closure (5) is designed as a window with side window supports (8) and a vertical axis of rotation. The window sash (7) is in Figure 1 indicated by dashed lines in a partially open position. The opening closure (5) is described below as a window with a frame (6) and a sash (7). The description applies analogously to other types of opening closures (5) and arrangements of bearings (8) and bearing axes.

In the variants of Figure 1 to 5 the chain thrust drive (1) and the end fitting (4) are arranged on a secondary closing edge (29) of the window (5). This is, for example, the lower and horizontal window edge aligned transversely to the bearing axes. Alternatively or additionally, the chain thrust drive (1) and the end fitting (4) can also be on the upper horizontal secondary closing edge (29) be arranged. They can also be arranged on the vertical main closing edge opposite the bearings (8).

The chain thrust drive (1) has a drive unit (3) and a push chain (2). The drive unit (3) and a chain station are housed in a housing (9) of the chain thrust drive (1), which for example has an elongated cuboid shape. The push chain (2) exits the housing (9) at a chain outlet (10), which is located on a side wall and in the central region of the housing (9). Figure 2 to 4 illustrates this exemplary arrangement. Alternatively, other designs of housing (9) and chain outlet (10) are possible. A chain push drive (1) can also have several, for example two, push chains (2).

The push chain (2) can be stiffened in push operation and when extending with pushing force. The end fitting (4) described below is provided for this.

The push chain (2) has gem. Figure 4 and 5 a plurality of chain links (13) which are articulated together. The chain links (13) each have link plates (16) and back stops (17) as well as chain pins (14) with pin axes (15). The chain links (13) can have inner and outer link plates (16) which overlap one another in the pin area.

The back stops (17) serve to stiffen the push chain (2) in push operation. The chain links (13) can support each other at the back stops (17) and prevent the push chain (2) from buckling under shear load.

Through the end fitting (4) described below, the push chain (2) takes one in push operation Figure 3 and 4th shown curvature and rigid back bend (12), in which the driving and pushing force and extension movement can be transmitted to the wing (7). The chain back (11) and the back stops (17) arranged here point in the direction of the center of curvature (not shown) or are arranged on the inside of the curve of the curved or curved push chain (2). In the arrangement of the chain thrust drive (1) shown, the pin axes (15) of the chain pins (14) have an upright, in particular vertical, orientation and are arranged and aligned parallel to the bearing axes of the bearings (8).

The drive unit (3) of the chain thrust drive (1) is not shown in detail. It has a chain station in which the retracted push chain (2) can be received. It can be laid in a meander with two or more strands in a curved shape. The drive movement of the push chain (2) is controlled by a suitable drive, in particular an electric motor and gear, and a drive means, e.g. a sprocket.

An outlet opening (28) is arranged at the chain outlet (10). How Figure 4 illustrates, the outlet opening (28) has a width that is greater than the chain width. In addition, an outlet slope (27) is arranged in the housing (9) at the chain outlet (10), on which the push chain (2) which runs out of the housing (9) at an angle due to the back bend (12) can lay on and support itself in overrun operation.

The end fitting (4) is arranged on the free end region (18) of the push chain (2). It has a force / torque sensor (23) which, in overrun mode, pushes the push chain (2) into a rigid back bend (12) and into one curved position forces. In the exemplary embodiment shown, a moment (M) acts which Figure 1 , 3rd and 4th is indicated. The moment (M) generated by the force / moment generator (23) is supported on the closure part (6, 7), here on the wing (7), and is directed against the chain spine (11).

The end fitting (4) is arranged and mounted between the end region (18) and the movable closure part (7) or the wing of the opening closure (5). The end fitting (4) has an attachment (19) which can be mounted and attached to the wing (7) with screws or other fastening means. The end fitting (4) also has a chain receptacle (21) with which the end region (18) of the push chain (2) can be received. The end region (18) can e.g. are formed by the last chain link (13).

In the exemplary embodiment shown, the housing (9) of the chain thrust drive (1) is mounted on the frame (6) and the end fitting (4) is mounted on the outside of the wing (7). The housing (9) of the chain thrust drive (1) can be recessed on the outside on the frame (6) or in the frame (6), for example in a hollow frame profile. Figure 2, 3 and 4th show the different mounting options. The arrangement can also be reversed, the end fitting (4) being mounted on the frame (6) and the housing (9) and the drive unit (3) of the chain thrust drive (1) on the wing (7).

In the embodiment shown, the push chain (2) running out of the side of the housing (9) extends under the wing (7) and is received on the end fitting (4) mounted on the outer end face of the wing (7).

Figure 6 and 7 illustrate an exemplary embodiment of a first variant of the end fitting (4). The attachment (19) to be mounted or mounted on the closure element (6, 7), in particular on the wing (7), is designed as a base (20). This has screw openings or other fastening options on its end face. The base (20) extends transversely to the main plane of the wing (7).

The chain holder (21) is e.g. designed as a turnstile (22). It is arranged on the outer free end region of the attachment means (19) and below it. A bearing (26) is arranged between the attachment (19) or base (20) and the chain receptacle (21) or the rotary block (22). The chain receptacle (21) can rotate about an upright axis of rotation (25) relative to the stationary attachment (19) attached to the wing (7). The axis of rotation (25) runs parallel to the pin axes (15) and to the bearing axes of the bearings (8).

The chain holder (21) has gem. Figure 6 and 7 a receiving opening (30) adapted to the chain link contour and an indicated fastening means (31) for the end region (18), in particular the last chain link (13). The fastening means (31) is, for example, a screw which runs transversely to said receiving opening (30) and which can be adapted to be clamped against the last chain link (13) or inserted through it. For this purpose, the link plates (16) can have a through hole, not shown.

The chain receptacle (21) can receive the end region (18) of the push chain (2) in a non-positive and positive manner in the manner described above. A rotary movement of the chain receptacle (21) about the axis of rotation (25) is transmitted to the end region (18) or the last chain link (13) and rotates it in such a way that in overrun mode the push chain (2) in Figure 3 and 4th shown back bend (12) takes.

Alternatively, other configurations of the chain holder (21) are possible. The end region (18) does not have to be formed by a last chain link (13). It can be formed by an attachment at the end of the chain, in particular on the last chain link (13).

The force / moment generator (23) acts between the attachment (19) and the chain holder (21). In overrun mode, it transmits a force and a movement to the chain receptacle (21) for producing the said back bend (12). The force / moment transmitter (23) can be arranged between the attachment (19) and the chain holder (21).

In the illustrated embodiment of Figure 6 and 7 the force / torque transmitter (23) has a spring arrangement (24). This is, for example, a torsion spring which is arranged between the chain receptacle (21) and the front end of the attachment (19) in corresponding spring receptacles. The torsion spring is arranged concentrically to the axis of rotation (25). The spring arrangement (24), in particular the torsion spring, can be preloaded. For this an in Figure 6 and 7 indicated clamping means (32), for example a clamping screw. It can also axially hold and connect the attachment (19) and the chain receptacle (21).

The force / moment transmitter (23) is arranged and designed in such a way that it relaxes the chain seat (21) about the axis (25) and generates the back bend (12). It is designed in such a way that this function is available over the entire extension path of the push chain (2). When the push chain (2) is retracted into the housing (9), the aforementioned rotation is canceled and that in the Push operation curved push chain (2) again straight and aligned perpendicular to the longitudinal axis of the housing. During this reverse rotation of the chain holder (21), the force / torque transmitter (23) is tensioned again.

Figure 8 shows an exemplary embodiment of a second variant of the end fitting (4). The attachment (19) is formed by a bracket (33) and a rotating part (34) attached, in particular screwed, to it. Depending on the kinematics, the bracket (33) can be suitably fastened, for example screwed, to one of the closure parts (6, 7). For this purpose, the angled bracket (33) can have a fastening flange, in particular a screw flange, at the free end.

The rotating part (34) is mounted on the other end of the console, for example hanging. It can be similar to the front area of the base (20) in the first variant of Figure 6 and 7 be trained. The rotating part (34) can accommodate the force moment transmitter (23), in particular the spring arrangement (24), at least in regions in an internal cavity. The above-mentioned tensioning means (32), in particular a tensioning screw, can also be present.

The chain receptacle (21) is designed as a rotary block (22) as in the first variant and is pivotally mounted about the axis of rotation (25) on the rotating part (34) of the attachment (19) by means of the bearing (26). The rotating part (34) and the rotating block (22) can have a different external shape in the second variant. For example, they are cylindrical. They have the same outside diameter and are aligned with each other along the axis (25). This rounded outer contour has advantages in terms of attractive design and abutting edges or pinch gaps compared to the first variant. The function of the two variants of the end stop (4) shown is otherwise equal.

Modifications of the shown and described embodiment are possible in different ways.

In another embodiment, which is not shown, the end fitting (4) can be arranged hidden in a fold of a closure element (6, 7). It is also possible to design the attachment (19) as a pin and to arrange it on the associated closure element (6, 7), in particular in the fold mentioned. The chain holder (21) can be rotatably received on this pin. You can e.g. be designed as a sleeve and mounted on the cylindrical pin. The connection of the rotatable sleeve to the end region (18) can be designed in any suitable manner. The rotatable sleeve or chain receptacle (21) can e.g. be inserted into a chain link (13) and can replace the chain pin (14). In these or other cases, the force / moment transmitter (23) can be designed as a linear spring arrangement. He can e.g. arranged in the fold or elsewhere of the associated closure element (6, 7) and aligned along its longitudinal extent. The force / moment transmitter can be supported on the closure element (6, 7) and act on the chain receptacle (21) or possibly also directly on the end region (18), in particular the last chain link (13). This can e.g. be a compressive force which rotates the end region (18) such that the back bend (12) is occupied.

In a further variant, the base-like attachment (19), for example, can have a joint and be designed to be bent. The front part of the attachment can form the chain receptacle (21). In such an embodiment, the force / torque generator can also have a spring arrangement which is formed, for example, by a tension spring which defines the kink position or swivel position of the chain holder (21) generated.

The design and arrangement of the force / torque sensor (23) can also vary. Any other force and displacement generating means can be used instead of a spring arrangement (24). This can have resilient properties and represent a passive element. Alternatively, an active design of the force / torque generator (23) with an element that can be driven by external energy supply, e.g. a cylinder, a piezo element, a motor element or the like. Possible.

In a further modification, it is possible to produce the back bend (12) by moving the chain receptacle (21) and the end region (18) along a predetermined path. This can e.g. a shift along a curved and / or straight slide track or guideway. A correspondingly directed force can be applied by a suitable force / moment generator (23). This can e.g. a pushing or pulling force instead of a torque in the exemplary embodiment shown.

Furthermore, it is possible to combine the features of the above-described embodiment and the modifications and variants mentioned with one another as desired and, if appropriate, also to exchange them.

REFERENCE SIGN LIST

1

Chain thrust drive

2nd

Push chain

3rd

Drive unit

4th

End fitting

5

Opening lock, window

6

Locking part, frame

7

Locking part, wing

8th

camp

9

casing

10th

Chain outlet

11

Chain spine

12

Back bend

13

Chain link

14

Chain pin

15

Pin axis

16

Chain link

17th

Back stop

18th

End area

19th

Attachment

20th

base

21st

Chain holder

22

Turnstile

23

Force / moment generator

24th

Spring arrangement

25th

Axis of rotation

26

camp

27th

Discharge slope

28

Outlet opening

29

Secondary closing edge

30th

Receiving opening

31

Fasteners, screw

32

Clamping device, clamping screw

33

console

34

Turned part

Claims (15)

End fitting for the free end region (18) of a multi-link push chain (2) of a chain push drive (1), which can be stiffened in overrun operation, for an opening lock (5) of a building opening, the end fitting (4) having a force / moment transmitter (23) which holds the push chain (2) in pushing operation forces a rigid back bend (12), the end fitting (4) attaching means (19) which can be fastened to a closure part (6, 7) of the opening closure (5) and a chain receptacle (21) for the end region (18 ), the attachment (19) and the chain receptacle (21) being pivotally connected to one another about an axis of rotation (25), in particular mounted on one another (26), the force / moment transmitter (23) connecting attachment (19) and the chain seat (21) moves in overrun relative to each other about the axis of rotation (25). End fitting according to claim 1, characterized in that the moment (M) generated by the force / moment generator (23) or the force generated can be supported on the closure part (6, 7) of the opening closure (5) and against a chain spine (11) Push chain (2) is directed. End fitting according to claim 1 or 2, characterized in that the push chain (2) has a plurality of articulated chain links (13) with back stops (17) and chain pins (14) with pin axes (15), the axis of rotation (25) being parallel to the Pin axes (15) is aligned. End fitting according to claim 1, 2 or 3, characterized in that the force / moment transmitter (23) is arranged and acts between the attachment means (19) and the chain receptacle (21). End fitting according to one of the preceding claims, characterized in that the force / moment transmitter (23) can be tensioned. End fitting according to one of the preceding claims, characterized in that the force / moment transmitter (23) has a spring arrangement (24). End fitting according to one of the preceding claims, characterized in that the attachment means (19) is designed as a base (20) which can be mounted on the front on a closure part (6, 7) of the opening closure (5) or as a bracket (33) with a rotating part (34) . End fitting according to one of the preceding claims, characterized in that the chain receptacle (21) is designed as a rotary block (22) and is rotatably mounted on the attachment means (19), in particular on the base (20) or rotating part (34), with a bearing (26) . End fitting according to one of the preceding claims, characterized in that the chain receptacle (21) has a preferably shape-adapted receiving opening (30) and a fastening means (31) for the end region (18), in particular the last chain link (13), of the push chain (2) . Chain pusher drive with a multi-link pusher chain (2) that can be stiffened in the pusher mode and with an end fitting (4) for the free end region (18) of the pusher chain (2), characterized in that the end fitting (4) is designed according to one of claims 1 to 9 . Chain thrust drive according to claim 10, characterized in that the chain thrust drive (1) has a housing (9) with a chain outlet (10). Chain thrust drive according to claim 10 or 11, characterized in that an outlet opening (28) widened beyond the chain width and a run-up slope (27) are arranged at the chain outlet (10), which exit at an oblique exit of the push chain (2) in accordance with the curvature of its rigid back bend (12) are adapted in overrun mode. Opening closure of a building opening with a stationary closure part (6), in particular a frame, and an unsteady closure part (7), in particular a movable wing, a chain thrust drive (1) being arranged between the closure parts (6, 7) on the opening closure (5), characterized in that the chain thrust drive (1) is designed according to one of claims 10 to 12 and an end fitting (4) is provided according to one of claims 1 to 9. Opening lock according to claim 13, characterized in that the housing of the chain thrust drive (1) on the stationary locking part (6) on the outside or recessed is mounted. Opening closure according to claim 13 or 14, characterized in that and the end fitting (4) on the transient closure part (7) is mounted on the outside or in a fold.

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