Lock with swing bolt

Abstract

The invention relates to a lock for a window or a door, comprising a pivot bolt (6) which can be pivoted out of a housing (11) into a locking position about an axis (9) through a bolt passage opening of a faceplate (2) and which engages into a bolt engagement which is stationary with respect to the leaf, wherein, in a locking position of the lock, a hook mouth (15) engages behind a locking edge of the bolt engagement. In order to provide a simply constructed and effective push-back lock, a housing edge (16) is provided which runs perpendicular to the faceplate (2) of the housing (11). This edge, relative to the axis (9) of the pivot bolt (6), lies in the return pivoting direction (R) of the pivot bolt (6) and, in the locking position, projects into the interior of the housing (11) at a short distance (17) from a body edge (18) of the pivot bolt (6).

Description

[0001] The invention relates to a lock for a door or window with a pivot bolt. Such locks are already known.

[0002] Swing bolts are considered particularly secure locking devices because they engage behind a locking edge of the bolt engagement, thereby safely absorbing the horizontal displacement forces exerted on the sash during a break-in attempt. During a break-in attempt, an attempt is made to force the bolt engagements out of their locking engagement with the bolt by deforming the sash or sash stile perpendicular to the rebate using a tool. The sometimes hook-shaped swing bolts prevent this and prevent the distance between the rebates from increasing. The sash can then be vertically loaded using similar means to cause the swing bolt to strike the bolt engagement and swing back. A direct attack on the swing bolt with the aim of swinging it into its unlocked position is also possible. This pushing back is often achieved with brute force.To prevent these attacks from being successful, various options have already been considered.

[0003] DE 10341442 A1 discloses a lock with a pivot bolt that pivots forward from a lock housing in its locked position under the influence of a spring. The pivot bolt is pivoted back into the lock housing via a drive rod slide. A blocking element is provided in the lock housing, which supports the pivot bolt in its locked position to prevent it from pivoting back.

[0004] From EP 1790802 B1 it is already known to provide a locking edge on the swivel bolt of a lock, which is aligned parallel to a faceplate of the lock housing and which, in the locking position of the swivel bolt, is engaged behind by an angled portion of a drive rod slide.

[0005] In both designs, the aim is to prevent the swing bolt from pivoting backward by having the connecting rod engage behind the bolt. The disadvantage is that these solutions require the bolt to pivot completely. However, after a certain period of time, the bolt no longer pivots completely due to bearing play and wear. Dirt and abrasion in the bolt engagement can also prevent complete pivoting. The connecting rod can then no longer move fully and, in some cases, even strikes the bolt. As a result, the edge of the connecting rod no longer reaches the bolt, or only reaches it to a lesser extent.

[0006] From DE 202018003080 U1 (EP 3591145 A1 and EP 3722542 A1) it is known to move the swivel bolt into the locking position parallel to the faceplate, which forms a front housing closure. During the pivoting movement, the swivel bolt projects with its hooked mouth in front of the faceplate and engages with the locking element on the frame side. In the locking position, the swivel bolt is also displaced parallel to the faceplate and, with a locking projection, engages the passage opening in the faceplate and is positioned at the longitudinal end of the passage opening. The locking projection engages the longitudinal end and counteracts a restoring force acting on the swivel bolt. During a reclosing movement via the espagnolette lock, the swivel bolt is first lifted and the locking projection is guided past the longitudinal end of the passage opening. The first disclosed embodiment requires an auxiliary slide to move the swivel bolt.The second embodiment uses a lever linkage to lower the pivot bolt. Therefore, both solutions involve multiple moving components, requiring complex assembly.

[0007] Other solutions intended to prevent the pivot bolts from being pushed back have become known from EP 3795783 B1, DE 102005002296 B3, and EP 1544391 A2. These designs provide gear-drive pin connections for the pivot bolt movements, which also have a complex structure.

[0008] DE 3427713 A1 discloses a swing bolt drive in which the control cam in the connecting rod slide of a secondary lock is L-shaped, and a control pin of the swing bolt, in the locking position, engages a leg of the control cam running parallel to the direction of travel of the connecting rod. This prevents the swing bolt from being pushed back. This leg is designed to be short so as not to reduce the available travel of the connecting rod.

[0009] EP 0578004 A2, on the other hand, discloses a push-back lock that is to be activated by the engagement of a control pin. The control pin is guided in a slotted guide in the lock cover and the lock base and is carried along this guide by the drive rod. To do this, the control pin engages both in the slotted guide and in a driving recess running perpendicular to the faceplate and the direction of movement of the drive rod. The slotted guide is designed in such a way that it has a section that runs at an obtuse angle to the driving recess. When the swivel bolt is pushed back, the control pin therefore blocks the swivel bolt. This design requires precise coordination of the slotted guide in the lock base and the lock cover, as well as the drive rod.

[0010] EP 0411271 A1 shows a swing bolt lock in which the swing bolt has an S-shaped slotted guide, into which a control pin of a connecting rod slide engages. The slotted guide is positioned relative to the pivot axis of the swing bolt so that the pivoting movement is triggered when the connecting rod passes through the slotted guide. The ends of the slotted guide run parallel to the displacement direction of the connecting rod, thus securing the swing bolt in the locking and locking positions.

[0011] The locking position within the meaning of the invention is reached when the drive rod has assumed a locking end position and the locking elements driven by the drive rod assume their engagement position with the frame-side locking engagement elements.

[0012] The object of the invention is therefore to make it more difficult to push back the bolt and to achieve a simple and secure lock against pushing back the swivel bolt.

[0013] To achieve this object, the invention provides a housing edge running perpendicular to the faceplate of the housing, which edge lies in the return pivoting direction of the hook mouth with respect to the pivot axis of the swivel bolt and, in the locking position, projects into the interior of the housing at a short distance from a body edge of the swivel bolt.

[0014] If the swivel bolt is pushed back, the body edge of the swivel bolt will collide with the housing edge due to its design. An increased force will shift the swivel axis, which will further displace the body edge toward the housing edge.

[0015] To ensure that the hook jaw engages behind the swivel bolt, the hook jaw is designed with a swivel bolt edge aligned approximately parallel to the faceplate when in the locking position. This allows the swivel bolt to be displaced toward the housing edge parallel to the faceplate when a force is applied to the bolt during a break-in.

[0016] A further development provides for the swivel bolt to have a circular arc contour running concentrically to the pivot axis, to which a tangentially running body edge is connected. The circular arc contour can thus be pivoted past the housing edge to achieve the locking position.

[0017] A particularly simple design involves attaching the housing edge to a lock cover. This simplifies production, as only the lock cover needs to be attached.

[0018] Alternatively, the housing edge can be attached to a component anchored in the lock cover. This additional component allows for a flat design of the lock cover and a sharp-edged design of the housing edge.

[0019] Further advantageous embodiments are shown in the drawings. They show: Fig. 1a secondary lock case of a lock with a first version of the swivel bolt in locking position with lock cover, Fig. 2the secondary lock case according to Fig. 1 in locking position without lock cover, Fig. 3the secondary lock case Fig. 1 in the open position without the lock cover, Fig. 4 a secondary lock case without the lock cover and with a partially opened swivel bolt in the locking position, and Fig. 5 a secondary lock case after Fig. 4 without lock cover and with a partially opened swing bolt in the opening position.

[0020] The one in the Fig. 1 and2 The secondary lock case 1 shown is connected to a main lock case in a known manner by means of a faceplate 2 and a drive rod 3. Provided in the secondary lock case 1 is a drive rod slide 4, which is coupled to the drive rod 3 and can be controlled by the main lock case via a handle and / or key.

[0021] As in the Fig. 4 and 5 As can be seen, a link follower 5 is attached to the connecting rod slide 4. The link follower 5 is assigned to the pivot bolt 6 and engages in a contour 7 provided on the rear side of the pivot bolt 6. The link follower 5 has a triangular shape and is in the open position Fig. 5 on an edge 8 running parallel to the faceplate 2. If the drive rod slide 4 is moved from the open position to Fig. 5 into the locking position Fig. 4switched, the link follower 5 moves relative to the pivot bolt 6, which is mounted exclusively for rotation on the axis 9. A closing edge 10 of the contour 7, which runs inclined to the edge 8, lies in the displacement path of the link follower 5. Since the closing edge 10 runs eccentrically to the axis 9, the striking and the carrying of the link follower 5 causes the pivot bolt 6 to pivot into the locking position.

[0022] In the exemplary embodiment, a locking bolt 12 is slidably mounted in the housing 11 next to the pivot bolt 6. The locking bolt 12 engages with a pin (not visible here) in an S-shaped guide 13. The pivot bolt 6 and the locking bolt 12 form a locking mechanism of a secondary case 1. The secondary case 1 is provided in addition to the main lock case (not shown) of a locking device and forms a locking point located remote therefrom. The housing 11 consists of a housing case 14, which forms a shallow tray, and a lock cover 14', which essentially consists of a flat plate. The faceplate 2 closes the housing 11 in the direction of a rebate surface to which the locking device is mounted and forms a front closure. The housing case 14 and lock cover 14' are designed as stamped and bent parts.

[0023] The pivot bolt 6 and the locking pin 12 absorb pressure forces that arise when the leaf to which the locking device is attached is pressed against the frame to which the locking engagement elements associated with the locking device are attached.

[0024] In addition to these forces, the locking device must also be capable of absorbing forces exerted during a break-in attempt. In addition to forces perpendicular to the plane of the drawing, these include forces generated by tools driven between the sash and frame with the aim of expanding the access space. If sufficient space is opened up by drilling in the sash and / or frame or by the aforementioned tools, an attempt is made to relocate the bolts (swing bolt 6 and locking pin 12). To do this, for example, a torque can be applied to the swing bolt 6, which in the drawings causes a counterclockwise movement. The link follower 5 has a small lever arm compared to a tool that engages the hook mouth 15.

[0025] To make such an attack more difficult and prevent the device from swinging back, anti-return devices are provided. The anti-return device consists of a housing edge 16 running perpendicular to the faceplate 2 of the housing 11, which, with respect to the axis 9 of the swivel bolt 6, lies in the swing-back direction R of the hook jaw 15 and, in the locked position, protrudes into the interior of the housing 11 at a short distance 17 from a body edge 18 of the swivel bolt 6. The body edge 18 is an extension of a circular arc contour 19. The circular arc contour 19 runs concentrically to the axis 9. The body edge 18 adjoins the circular arc contour 19 as a tangent and extends beyond the intersection point 20 of the vertical central axis 21 with the circular arc contour 19. As a result of this design, the body edge 18 protrudes slightly beyond the radius of the circular arc contour 19, relative to an imaginary concentric extension of the circular arc contour 19.The distance 22 of the housing edge 16 from the axis 9 is thereby reduced in the last swivel range.

[0026] The design does not impede the pivoting movement of the pivot bolt 6. If a force is applied to the pivot bolt 6 with the intention of pushing it back, the axis 9 shifts downward in the drawing. This causes the body edge 18 to rest on the housing edge 16. The displacement of the axis 9 need only be small. Any further backward pivoting movement is counteracted by the support. If further force is applied, the axis 9 shifts more significantly, which means that the support cannot be removed.

[0027] As shown in the drawings, the hook jaw 15 is provided with a pivot bolt edge aligned approximately parallel to the faceplate 2 in the locked position. In the locked position, this pivot bolt edge engages behind a locking edge of the locking engagement, and the parallel alignment of the pivot bolt edge allows the pivot bolt 6 to be displaced parallel to the faceplate 2. Pivoting of the pivot bolt 2 due to the locking engagement is prevented, which promotes a blunt force introduction into the housing edge.

[0028] In the illustrated embodiment, the hook jaw 15 is open upwards, and the pivot bolt 6 rotates clockwise in the locked position. Locking can also be performed in a similar manner in the opposite direction to the described direction.

[0029] The illustrated embodiment provides that the housing edge 16 is attached to a lock cover 14'. The housing edge 16 is formed by an embossed portion 24, which deforms the lock cover 14' in sections toward the pivot bolt. Alternatively, an additional component to be mounted can also be provided.

[0030] From the Fig. 3 It can be seen that the circular arc contour 19 extends over an angular range 23 of less than 90°. List of reference symbols

[0031] 1Secondary box 2Faceplate 3Drive rod 4Drive rod slide 5Link follower 6Swing bolt 7Contour 8Edge 9Axis 10Closing edge 11Housing 12Locking bolt 13S-shaped link 14Housing case 14Lock cover 15Hook mouth 16Housing edge 17Distance 18Body edge 19Circular contour 20Intersection 21Central axis 22Distance 23Angle range 24Embossing RReturn direction

Claims

1. Lock for a window or a door, with a pivot bolt (6) which can be pivoted out of a housing (11) into a locking position about an axis (9) through a bolt passage opening of a faceplate (2) and which engages in a bolt engagement which is stationary with respect to the leaf, wherein in a locking position of the lock a hook mouth (15) engages behind a locking edge of the bolt engagement, characterized by a housing edge (16) running perpendicular to the faceplate (2) of the housing (11), which lies in the return pivoting direction (R) of the pivot bolt (6) with respect to the axis (9) of the pivot bolt (6) and, in the locking position, projects into the interior of the housing (11) at a short distance (17) from a body edge (18) of the pivot bolt (6).

2. Lock according to claim 1, characterized by that the hook mouth (15) has a swivel bolt edge aligned approximately parallel to the faceplate (2) in the locking position.

3. Lock according to claim 1 or 2, characterized by that the swivel bolt (6) has a circular arc contour (19) running concentrically to the axis (9), to which a tangential body edge (18) is connected.

4. Lock according to one of claims 1 to 3, characterized by that the housing edge (16) is attached to a lock cover (14`).

5. Lock according to one of claims 1 to 3, characterized by that the housing edge (16) is attached to a component anchored in the lock cover (14').

Images