Lock

Abstract

The invention relates to a lock (1) which, in the locking position, engages with bolts (3, 9, 10, 13) that are movable via a driving-rod slide (15), in locking plates (36) on the frame side, wherein at least one bolt (10) is designed as a cylindrical latch bolt (13) which can be pre-locked perpendicular to a rebate surface and which can be closed forwards and backwards along its latch axis (21) via the driving-rod slide (15), wherein the latch bolt (13) engages with a link follower (23) in a link (24) of the driving-rod slide (15). In order to provide an effective push-back protection which can be solidly constructed and avoids the disadvantage of the prior art, according to the invention the latch bolt (13) has a locking edge (22) which runs inclined to the latch axis (21) and is associated with a wedge edge (30) of a locking wedge (29) which runs parallel to said locking edge and can be displaced parallel to the driving-rod slide (15) and which is supported on a rear wall (31) of the housing.

Description

[0001] Lock

[0002] The invention relates to a lock, in particular a drive rod lock for use in apartment doors.

[0003] DE 4304214A1 discloses a connecting rod lock in which a main lock case and a secondary lock case are connected via a connecting rod and a faceplate. The secondary lock case contains a slider, which can be actuated via the connecting rod and moves a cylindrical locking bolt from a retracted, open position to a pre-locked, locked position. For this purpose, the locking bolt has lateral wings at its ends, one of which engages a guide pin with a cam. The cam has a Z-shaped profile. Both end sections of the cam are provided with sections running parallel to the direction of travel of the slider, and the section in between is inclined.Due to the end area running perpendicular to the locking axis of the locking bolt, the locking bolt is fixed in the two end positions of the sliding movement when the slide is moved and is moved back along the locking axis in the inclined section in between.

[0004] The engagement of the pin in the sections running parallel to the direction of displacement ensures that the drive rod slide cannot be displaced and that any push-back forces acting on the locking bolt do not lead to a backward displacement of the drive rod chain and the locking bolt actuated by it.

[0005] Retraction refers to the attempt by a burglar to force the locking bolt back into the lock by applying a force. In addition to removing the immediate locking point, in an unprotected system the drive rod chain also moves all locking points connected to the drive rod into their open position. The burglar's attempt is referred to as an attack and is carried out in several stages: First, an attempt is made to make the rebate between the sash and frame accessible for further tools. Then, spreading devices are introduced into the space in order to increase the distance between the rebates and to break the engagement of the locking elements in the strike plates. In high-quality locking systems, the locking is therefore carried out with locking elements that counteract an increase in the distance. This can, for example,by mushroom bolts or hook bolts, which engage behind the bolt entry openings of the striking plates and thus prevent prying. The effectiveness of the hook bolts therefore essentially depends on whether the bolt with its hook end completely engages behind the bolt entry opening. To ensure this, DE 4304214 A1 stipulates that the locking process takes place in chronologically successive steps. In a first step, a locking bolt with a wedge-shaped tip closes. This tip creates an aligning movement of the sash and frame and causes the lock and striking plate to face each other; after this, the hook bolt pivots into the bolt entry opening. This is particularly necessary when there are seals between the sash and frame that need to be elastically deformed when the sash is closed.In addition to unlocking the locking bolt, a burglar's attack on the locking bolt could also be intended to move the drive rod into an unlocked position, which would move the hook bolt into its open position. For this reason, push-back locks are provided. The end regions of the guide slot, which are parallel to the direction of movement and as provided for in DE 4304214 A1, prevent reverse displacement due to the obtuse angle. The disadvantage of this proven technology is that the force applied during a break-in attempt via the cylindrical pin leads to a linear load on the slide in the guide slot. A flat design of the pin as a sliding block is possible, but can lead to increased friction when the slide is moved via the drive rod. Furthermore, such a design increases the force that must be applied to the drive rod slide via the drive rod.Finally, this arrangement also means that the locking bolt must always partially complete the travel specified by the gate contour to prevent it from being pushed back. If the locking bolt is prevented from fully closing due to friction or foreign matter in the bolt entry opening, the control pin will not enter the end section, and the push-back protection is not provided.

[0006] This leads, particularly in automatic locks that do not require operator interaction to lock, to the locking bolts not locking or only partially locking. In such a case, the hook bolt would also only lock partially and incompletely. Tampering with the bolt by inserting objects into the bolt entry openings of the strike plates can therefore be effective in the run-up to a break-in attempt. Furthermore, the material thickness of the slider cannot be varied at will, as bending and drilling become more difficult as the material thickness increases.

[0007] There is therefore a need for an effective back pressure protection device that can be designed solidly and avoids the disadvantage of the state of the art.

[0008] This problem is solved by the locking bolt having a locking edge inclined to the bolt axis, to which a wedge edge of a locking wedge, which can be moved parallel to the connecting rod slide, is assigned. The wedge is supported on the rear wall of the housing. This design causes the locking wedge, with its inclined locking edge, to follow the forward-closing locking bolt with a downward movement and insert itself between the locking bolt and the rear wall of the lock housing. The locking bolt is supported on the rear wall of the housing in a form-fitting manner.

[0009] The forces generated when the door is pushed back are not absorbed by the connecting rod slide, but rather transferred into the housing. The housing is double-walled, thanks to the lock base and lock cover, making it more stable than the connecting rod slide and supporting itself against the sash profile. At the same time, the push-back lock is activated at an early stage of locking, even when the locking bolt is not fully closed.

[0010] A further development provides for the locking edge to be attached to the tail of the locking bolt. This relocates the anti-return device to the rear part of the lock housing.

[0011] To maximize the clamping effect in the event of an attack on the locking bolt, the locking edge and the wedge edge are designed to abut each other with stair-step-like teeth running vertically and parallel to the locking axis. These butt-fitting surfaces do not generate any force components that would cause actuating forces on the connecting rod slide.

[0012] To ensure unlocking through authorized use, the locking wedge is provided with a longitudinal recess running parallel to the direction of travel of the connecting rod slide, into which the connecting rod slide engages with a reset stop. The connecting rod slide thus guides the locking wedge out of engagement with the bolt tail when the opening position is set.

[0013] To allow the locking wedge to travel its full range of motion, the longitudinal recess is designed and dimensioned so that the connecting rod slide is positioned away from the return stop in its locked position and rests against it in the open position. When the connecting rod slide is actuated, the engagement surfaces are thus aligned so that the wedge is first lifted from its locked position and then the locking bolt is retracted.

[0014] The invention can also be advantageously used in espagnolette locks, where the espagnolette slide is connected to espagnolettes to which additional locking elements are attached. These locking elements can be simple mushroom-head bolts. To improve the security of the door element equipped with the lock, the espagnolette lock is an automatic lock that, when the rebates of the sash and frame are parallel and opposite each other, moves from an open position to the locked position by means of an energy accumulator acting on the espagnolette. The bolts are thus automatically moved from the open position to the locked position, without the need for user operation.

[0015] The fact that the locking bolt is mounted in a secondary lock case of the espagnolette lock also contributes to security, as this arrangement allows multiple locking bolts to be installed at different locations on the door. More complex locking elements can be accommodated and arranged in the secondary lock case.

[0016] As mentioned above, the security of the door element against attack can be improved by having locking elements engage behind the bolt entry openings of the strike plates. Therefore, one design provides for a pivoting hook bolt on the same strike plate to be assigned to the locking bolt. This creates a compact and reliable locking point.

[0017] To facilitate the penetration of the locking bolt into the strike plate, the end of the locking bolt facing the strike plate is wedge-shaped. This allows the lock to align itself relative to the strike plate.

[0018] To achieve maximum pre-closing of the locking bolt, the locking bolt is loaded in the pre-closing direction by means of an energy accumulator, in particular a leg spring, and the link follower has a certain amount of play along the locking axis relative to the link of the connecting rod slide. This makes the distance the locking bolt advances independent of the movement of the connecting rod slide and also reduces the actuation forces that must be applied by the user or, in the case of an automatic locking system, by the energy accumulator.

[0019] Further advantageous embodiments are shown in the drawings. They show:

[0020] Fig. 1 is an overview of a lock designed as a drive rod lock with a secondary lock case,

[0021] Fig. 2 the secondary lock case in individual representation and on an enlarged scale in the opening position of the drive rod,

[0022] Fig. 3 shows the secondary lock case according to Fig. 2 in the closed and positioning position, Fig. 3a shows a section along the line Illa-Illa in Fig. 3, Fig. 4 shows the secondary lock case according to Fig. 2 in the closed position, but with the locking bolt not fully closed and

[0023] Fig. 4a shows a section along the line IVa-IVa in Fig. 4.

[0024] Fig. 1 shows a lock 1 as an espagnolette lock. The illustration shows the espagnolette lock 1 in its locked position. A bolt 3 and a latch 4 are provided in the main lock case 2. A release 5 in the form of an auxiliary latch is attached above the latch 4. When the sash is closed, the auxiliary latch 5 comes into contact with the frame or a striking plate attached to the frame at the same time as the latch 4, causing both to retract into the main lock 2. If the latch 4 subsequently extends into the striking plate opening and the release 5 remains on the striking plate, a locking link in the main lock case 2 is moved from a locked position to a released position. The entire espagnolette chain, consisting of an espagnolette slider arranged in the main lock case 2 (not shown here) and a driving rod 6 connected to it, is moved into the locked position via an energy accumulator.All locking elements coupled with the drive rod chain thus reach their locking position, in which they lock the sash (not shown) to the frame using frame-side strike plates.

[0025] In the illustrated embodiment, a secondary lock case 7 is provided next to the main lock case 2, which is connected to the main lock case 2 via the drive rod 6 and a faceplate 8. The faceplate 8 flush covers a fitting receiving groove in the rebate of the sash.

[0026] The secondary lock case 7 has a hook bolt 9 and a bolt 10. To operate the lock 1, the main lock case 2 contains a follower 11 for coupling the drive to a handle and a profile cylinder receptacle 12 for accommodating a profile cylinder. The bolt 10 is designed as a cylindrical locking bolt 13 that can be pre-locked perpendicular to a rebate surface and the faceplate 8.

[0027] In Fig. 2, the secondary lock case 7 is shown without the lock cover in the open switching position. In this switching position, the locking bolt 13 is retracted behind the faceplate 8. The hook bolt 9 is arranged below the locking bolt 13. In the housing 14, a connecting rod slide 15 is mounted so as to be displaceable parallel to the faceplate 8. The connecting rod slide 15 is essentially designed as a flat, rectangular sheet metal strip. A bend 16 protrudes vertically upwards from the plane of the connecting rod slide. A spring 17 engages the bend 16. The spring 17 is tensioned when the connecting rod chain and the connecting rod slide 15 are in the open position and urges the connecting rod slide 15 into the locking position. The locking bolt 13 is provided with a wing-like extension 19 on the locking bolt tail 18, which rests flat on the connecting rod slide 15.A locking edge 22 is provided at the end of a leaf 20, running at an angle to the locking axis 21. The locking edge 22 runs at an angle of approximately 45° to the locking axis 21. A slotted follower 23 is attached to the underside of the leaf 20 and engages with a slotted link 24 of the connecting rod slide 15. The slotted link 24 is essentially J-shaped, with the longer slotted link section 25 running at an angle to the section 26, which runs parallel to the displacement axis 27 of the connecting rod slide 15. The slotted link follower 23 is provided with a thickened portion at its upper end 28, giving it a teardrop shape.

[0028] In the housing 14 of the auxiliary box 7, a locking wedge 29 is also provided, which can be moved parallel to the connecting rod slide 15. The locking wedge 29 has a wedge edge 30 running parallel to the locking edge 22. On the support side 32 facing the housing rear wall 31, a longitudinal recess 33 is provided on the locking wedge 29, which runs parallel to the displacement axis 27 of the connecting rod slide 15 and into which the connecting rod slide 15 engages with a bent portion 34. A leg spring 35 engages the locking bolt tail 18 and urges the locking bolt 13 into its locked position.

[0029] Fig. 3 shows the locking point according to Fig. 2 locked together with a frame-side strike plate 36. Looking at Figures 1-3 together, the following function emerges. If the sash to which the lock 1 is attached comes into contact with the frame, the frame or a strike plate attached to it actuates the release 5 and releases the fixation of the lock 1. By the spring 17 acting on the drive rod chain, the drive rod slide 15 is displaced downwards along the displacement axis 27 in the drawing. In this process, the guide 24 releases the locking bolt 13, which is subject to the spring force of the leg spring 35, causing it to close. The locking edge 22 advancing along the bolt axis 21 and the angled portion 34 moving downwards in the drawing releases the spear wedge 29, which slides downwards due to gravity and rests with the wedge edge 30 against the locking edge 22.It can be seen that the longitudinal recess 33 is arranged and dimensioned such that the drive rod slide 15 with the angled portion 34 in its locking position according to Fig.3 moves downwards away from the longitudinal end of the longitudinal recess 33 in the drawing and rests against it in the open position according to Fig. 2.

[0030] Due to this arrangement, the locking wedge 29 fills the space between the

[0031] locking bolt tail 18 and the housing rear wall 31. The locking bolt 13 is therefore supported on the housing rear wall 31 with almost no play. With the end 37 opposite the locking bolt tail 18, the locking bolt 13 engages in a locking pocket 38 of the striking plate 36. As can be seen from the sectional view in Fig. 3a, the locking bolt 13 engages with its wedge-shaped tip in the V-shaped receptacle 39 in the locking pocket 38. It can be seen that the interaction of the wedge-shaped end 37 in the receptacle 39 brings about an aligning movement of the lock 1 relative to the striking plate 36. The hook bolt 9 can be pivoted by the espagnolette slide 15 and engages in the locking pocket 40. From Figs. 2 to 4 it is also evident that the locking edge 22 and the wedge edge 30 are arranged against each other with stair-step-like teeth running perpendicular and parallel to the locking axis.The movement of the locking wedge 29 relative to the locking edge 22 is therefore not continuous, but the force applied by the locking bolt 13 to the locking wedge 29 in the event of an attack always occurs along the locking axis 21 and does not cause any force components running transversely thereto. At the same time, the attack, with the attempt to increase the distance 41 between the strike plate 36 and the faceplate 8, results in the locking bolt 13 penetrating further into the locking pocket 38 due to the force applied by the leg spring 35. The hook bolt 9 limits the maximum distance 41.

[0032] This arrangement also ensures that the locking bolt 13 is supported even when the locking bolt 13 is only partially pre-locked, as can be seen below in Figs. 4 and 4a. In these two illustrations, the locking bolt 13 is only partially pre-locked, for example, due to a foreign body (not shown here) in the locking pocket 38 or a seal between the sash and frame that prevents the sash and frame from being aligned parallel to the surface. Due to the previously described arrangement and the inclined locking edge 22 and the wedge edge 30 aligned parallel thereto, the locking wedge 29 nevertheless reaches a position that prevents the locking bolt 13 from being pushed back. Due to the partially obstructed pre-locking of the locking bolt 13, the angled portion 34 is offset from the end 42 of the longitudinal recess 33.The connecting rod slide 15 is fully moved by the spring 17, and the hook rule 9 is fully pivoted into the control pocket 40. The generously dimensioned guide 24, which has a clearance, allows the connecting rod slide 15 to move freely.

[0033] A seal can also contribute to the locking bolt 13 coming into contact with the locking pocket 38 too early, thus preventing it from extending completely, for example due to the door seal being too high or a warped door. To ensure that the door leaf is held in the closed position despite the door seal being compressed by the accelerated door leaf mass, the locking edge 22 and the wedge edge 30 on the locking wedge 29 hold the locking bolt 13 in position on the V-shaped recess 39. To unlock the locking device, in the exemplary embodiment shown in Figures 1 to 4a, the lock 1 is operated using the operating elements 11, 12 mounted in the main lock case 2 and the drive rod chain is moved into the unlocking position according to Figure 2.The connecting rod slide 15, with the guide edge 43 located in the direction of the end 37, comes into contact with the guide follower 23, which retracts the locking bolt 13 when the connecting rod slide 15 moves upwards.

[0034] It is clear that the application of the invention offers particular advantages in an automatic lock. Furthermore, the design of the anti-return device can also be implemented in a lock that does not have drive rods and secondary lock cases 7. In this case, the drive rod slide 15 is provided exclusively in the main lock case 2.

[0035] List of reference symbols

[0036] 1 castle

[0037] 2 main lock cases

[0038] 3 bars

[0039] 4 traps

[0040] 5 triggers

[0041] 6 Drive rod

[0042] 7 secondary lock case

[0043] 8 Faceplate

[0044] 9 hook latches

[0045] 10 bars

[0046] 11 Nut

[0047] 12 profile cylinder holder

[0048] 13 locking bolts

[0049] 14 housings

[0050] 15 connecting rod valves

[0051] 16 Angulation

[0052] 17 spring

[0053] 18 locking bolt tail

[0054] 19 Expansion

[0055] 20 wings

[0056] 21 locking axis

[0057] 22 locking edge

[0058] 23 Scenery Followers

[0059] 24 backdrop

[0060] 25 Scenery section

[0061] Section 26

[0062] 27 Shift axis

[0063] 28 End

[0064] 29 Spear Wedge

[0065] 30 wedge edge

[0066] 31 Rear panel

[0067] 32 support side

[0068] 33 Longitudinal recess

[0069] 34 Angulation

[0070] 35 torsion spring

[0071] 36 strike plate

[0072] 37 End 38 Bar pocket

[0073] 39 recording

[0074] 40 bar bags

[0075] 41 Distance 42 End

[0076] 43 backdrop edge

Claims

Claims 1. Lock (1) which, in the locking position, engages in frame-side locking plates (36) with bolts (3, 9, 10, 13) movable via a drive rod slide (15), wherein at least one bolt (10) is designed as a cylindrical locking bolt (13) which can be pre-locked perpendicular to a rebate surface and which can be pre-locked and re-locked via the drive rod slide (15) along its locking axis (21), wherein the locking bolt (13) engages with a slotted guide (23) in a slotted guide (24) of the drive rod slide (15), characterized in that the locking bolt (13) has a locking edge (22) running inclined to the locking axis (21), to which a wedge edge (30) running parallel thereto of a locking wedge (29) is assigned, which is displaceable parallel to the drive rod slide (15) and which is located on a housing rear wall (31) supports.

2. Lock (1) according to claim 1, characterized in that the locking edge (22) is attached to the locking bolt tail (18).

3. Lock (1) according to claim 1 or 2, characterized in that the locking edge (22) and the wedge edge (30) lie against one another with stair-like teeth running perpendicular and parallel to the locking axis (21).

4. Lock (1) according to one of claims 1 to 3, characterized in that the locking wedge (29) has a longitudinal recess (33) running parallel to the direction of displacement of the drive rod slide (15), into which the drive rod slide (15) engages with an angled portion (34).

5. Lock (1) according to claim 4, characterized in that the longitudinal recess (33) is arranged and dimensioned such that the drive rod slide (15) in its locking position is away from the longitudinal end of the longitudinal recess (33) and in the open position rests against it.

6. Lock (1) according to one of claims 1 to 5, characterized in that the lock (1) is designed as a drive rod lock, in which the drive rod slide (15) is connected to a drive rod (6) and the drive rods form a drive rod chain.

7. Lock (1) according to one of claims 1 to 6, characterized in that the lock (1) is an automatic lock which, when the rebates of the sash and frame are parallel and opposite one another, moves from an open position into the locked position by means of a force accumulator (spring (17)) acting on the drive rod chain.

8. Lock (1) according to one of claims 1 to 7, characterized in that the locking bolt (13) is mounted in a secondary lock case (7) of the espagnolette lock.

9. Lock (1) according to one of claims 1 to 8, characterized in that the locking bolt (13) is assigned a pivotable hook bolt (9) on the same strike plate (36).

10. Lock (1) according to one of claims 1 to 9, characterized in that the end of the locking bolt (13) facing the striking plate (36) is wedge-shaped and engages in the V-shaped receptacle (39).

11. Lock (1) according to one of claims 1 to 10, characterized in that the locking bolt (13) is subjected to force in the pre-locking direction by means of a force accumulator (leg spring (35)) and the link follower (23) has a play of movement along the locking axis (21) relative to the link (24) of the drive rod slide (15).

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