WO2007073288A2

WO2007073288A2 - Lock for windows, doors and the like

Info

Publication number: WO2007073288A2
Application number: PCT/SE2006/001441
Authority: WO
Inventors: Johan Calleberg
Original assignee: Fix Ab
Priority date: 2005-12-21
Filing date: 2006-12-19
Publication date: 2007-06-28
Also published as: SE530150C2; SE0502844L; WO2007073288A3

Abstract

A lock for windows, doors and the like, comprising a first cam (7, 107), for example a pressure cam, for moving a bolt (8, 108) between an open and a locked position, in which locked position the bolt engages with a frame, and a deadlocking cam (13, 113), for example a cylindrical cam or rotating cam, that can be moved between a non-deadlocked and a deadlocked position, in which deadlocked position the bolt is deadlocked in the locked position. In order to obtain secure and reliable monitoring of the window or the door and the lock, the lock comprises an indicating plunger (16, 116) that is connected mechanically to the deadlocking cam and is moved by this between a passive position and an active position, in which active position the indicating plunger interacts with a detector (5, 105) arranged in the frame, in order to indicate that the window or door is in a closed position and that the deadlocking cam in the deadlocked position.

Description

Lock for windows, doors and the like

Technical field

The invention relates to a lock for windows, doors and the like, as claimed in the preamble to claim 1.

The invention is particularly suitable for use with espagnolettes for windows and French windows.

Background art

With many types of lock applications, there is a need to be able to monitor the position of the door leaf or the opening casement and its lock in a simple way. The expressions closed, locked and deadlocked are often used to indicate that the door leaf or the opening casement is in a closed position relative to the frame, that the bolt of the lock is in engagement with a striking plate or the like in the frame, and that the engagement of the bolt with the striking plate is blocked or solid. The lock is often designed in such a way that, at least from one side of the door or window, the deadlocked position can only be cancelled by the use of a key, a code or some other coded identifying device. The deadlocked position is thus used to prevent unauthorized access via the door or window.

In order to make it easier to monitor the positions of such doors and windows and their locks, a light- emitting diode or the like can, for example, be arranged in the lock. The light-emitting diode can then indicate by means of a first colour that the lock is in a non-deadlocked state and by means of a different colour that the lock is in a locked and deadlocked state. In addition, the need for remote monitoring has recently increased, with the indication instead being achieved by, for example, a light-emitting diode that is located in a monitoring station that is located at a distance from the windows and doors that are to be monitored. In order to achieve monitoring of the state of the lock, it is necessary to be able to determine the position of the active components of the lock. In accordance with previously-known technology, this can be achieved by the use of, for example, micro-switches or other sensors that are arranged in the lock housing or lock case. However, this solution has disadvantages, as electrical cables must be arranged between the frame and the movable door leaf or casement in order to make the remote monitoring possible. If the indication of the state of the lock is to be carried out at the lock, cables between the frame and the door leaf and between the window frame and the casement can be avoided, but then a battery or the like must be arranged in the vicinity of the lock instead.

On windows and French windows, a frame surrounds one or more panes of glass, through which panes it is, of course, not desirable to run electrical cables. There are thus special problems associated with achieving remote monitoring of windows or French windows, as running cables through the relatively weak frame surrounding the glass is complicated, results in a further weakening of the frame and requires relatively long cable runs that go around the panes of glass. Even in those cases where indication is to be carried out in the vicinity of the window or French window, there is a disadvantage in using micro-switches or sensors arranged in the lock housing as these require space, as does the battery, and as the small dimensions of the frame surrounding the glass often require the lock housing to be made as compact and space-saving as possible.

Yet another disadvantage of such an arrangement where the monitoring is carried out using sensors that are arranged in the lock housing is that these can only monitor the state of the lock but cannot provide any information about the position of the door leaf. Such arrangements can thus provide a false indication that the door is closed and locked, if the lock bolt is in the locked position when the door itself is open.

Previously-known technology

DE 42 32 809 describes an espagnolette with an axially- movable lock bolt that consists of an end of the bolt rod of the espagnolette that projects from the door leaf. In the locked position, the lock bolt engages with a striking plate that is arranged in the frame. An electrical signal generator is arranged in the striking plate for monitoring the engagement of the lock bolt with the striking plate. The signal generator can comprise a Hall element that is activated by a permanent magnet arranged in the lock bolt.

EP 0 743 410 shows a similar arrangement, in which the lock bolt is provided with a permanent magnet and the striking plate is provided with a magnetic field sensor.

With both these previously-known arrangements, it is thus possible to achieve electronic monitoring of the lock without running cables through the window or the door. With these known arrangements, the danger is also reduced of false indications of the locked position if the lock bolt is in the locked position but the door or window is not closed, so that the bolt is not in engagement with the striking plate.

A disadvantage of these known monitoring arrangements is, however, that they do not provide any indication of whether the lock is deadlocked or not. Even though these systems indicate that the door or window is closed and that the lock bolt is in engagement with the striking plate, no information is provided about whether or not an unauthorized person can enter via the door or the window. Disclosure of invention

An object of the present invention is therefore to provide a lock for windows, doors and the like, that makes it possible to monitor the door's actual state of security in a more reliable way than what has previously been possible.

Another object is to provide such a lock, in which indication is only given if the door/window is closed, the lock bolt is in engagement with the striking plate and the lock bolt is deadlocked.

Yet another object is to provide such a lock that is simple to install, does not require cables to be run through the door or window, and does not require other special modification of the door or window.

Yet another object is to provide such a lock that takes up little space and can be designed as an espagnolette for windows and French windows.

Yet another object is to provide such a lock that has a simple and reliable design.

These and other objects are achieved by means of a lock of the type that is described in the preamble to claim 1 and that has the characteristics described in the characterizing part of the claim.

As a result of the separate indicating bolt that interacts with the detector mounted on the frame, the movement of which indicating bolt is controlled by the deadlocking follower, it is ensured in a simple and reliable way that indication is only given if the door or window is closed and the bolt is in the deadlocked position. As the detector is arranged in the frame, no cables need to be run between the frame and the door or window and nor is it necessary to run any cables through the door or window. The mechanical connection between the indicating bolt and the deadlocking follower means, in addition, that the lock arranged in the window or door can be completely mechanical and thus does not require any power supply from a battery or the like.

The lock is suitably designed in such a way that the deadlocking follower cannot assume the deadlocked position if the lock bolt is not in the locked position. By this means, the danger is also eliminated of an indication being given if the door or window is closed and the deadlocking follower is in the deadlocked position but the lock bolt is in the open position. In this way, it is ensured that the indication that is given actually means that the window or door is closed, that the lock bolt is in engagement with the frame and that the lock bolt is deadlocked. The indication thus means that the door or window can, in fact, not be opened unless a correct key or code is used or unless the lock is forced.

The detector mounted on the frame suitably comprises a Reed contact or a Hall element and the indicating bolt comprises a permanent magnet, that activates the detector when it is in the vicinity of this. In this way, a contact-free indication is obtained, that reduces the risk of wear and malfunction.

By designing the indicating bolt to be movable in an axial direction through an opening in the lock case and to be mechanically connected to the deadlocking follower by means of a pivoting link arm that interacts with a peripheral cam surface on the deadlocking follower, a space-saving and reliable design is made possible.

The lock according to the invention is particularly suitable for windows and French windows as a result of its simple and space-saving design and due to the fact that it is not necessary to run cables through the window or door. The lock is therefore suitably designed as an espagnolette.

Additional objects and advantages of the invention are apparent from the following detailed description and from the claims.

Brief description of drawings In the following, there is an exemplifying detailed description of embodiments of the invention, with reference to the drawings, in which:

Figure 1 is a plan view from the side of an embodiment of the lock according to the invention, in which the cover on the lock housing has been removed.

Figure 2 is a plan view corresponding to the view in Figure 1 in which additional components in the lock have been removed for the sake of clarity and showing the lock in a first position.

Figures 3—5 are plan views corresponding to the view in Figure 2 and showing the lock in other positions.

Figure 6 is a perspective view of a component comprised in the lock shown in Figures 1-5.

Figure 7 is a perspective view of another component comprised in the lock shown in Figures 1-5.

Figures 8-10 are plan views corresponding to the view in Figure 2 of a second embodiment of the lock and showing the lock in various positions.

Modes for carrying out the invention

Figures 1-5 show a first embodiment of the lock according to the invention. In the example illustrated, the lock is an espagnolette that comprises a lock casing or a lock housing 1, a face plate 2 and two bolt rods 3a, 3b, of which only a part is shown. The figures also show a handle 4 and a detector 5 in the form of a Reed contact that is arranged in a recess in a striking plate or directly in the frame (not shown).

The lock also comprises two pull rods 6a, 6b, one of which 6a is visible in Figure 1, but is removed in Figures 2-5 so that only the other pull rod 6b is shown in these figures. The pull rods 6a, 6b are arranged to transfer a movement from a first follower, that in the example shown consists of a handle follower 7, to the upper bolt rod 3a. As shown most clearly in Figure 7, the handle follower 7 has a square hole 7a to take a plain spindle (not shown), that is connected to the handle, and a tailpiece or carrier arm 7b with a projecting carrier pin 7c. The carrier pin 7c is in engagement with a carrier 12 that is connected to the pull rods 6a, 6b and to the lower bolt rod 3b. By turning the handle 4 and the handle follower 7 clockwise as shown in the figures, the two pull rods 6a, 6b and the two bolt rods 3a, 3b will be moved in a linear direction upwards in the figures. In a corresponding way, turning the handle 4 in a counter- clockwise direction, results in the pull rods 6a, 6b and the bolt rods 3a, 3b being moved downwards. The two bolt rods 3a, 3b can be connected in the usual way to external bolts, such as side bolts or end bolts that are arranged along the face plate and are designed, for example, as wedge bolts, swing bolts, mushroom bolts or in some other way.

A hook bolt 8 is attached in the lock housing by means of a pivot pin 9 in such a way that it can pivot, which pivot pin is attached to the front and back of the lock housing 1. The hook bolt 8 also has a guide opening 10 passing through it, in which there is a driving pin 11 that is attached at its ends to the pull rods 6a, 6b. As shown most clearly in Figure 6, the guide opening 10 has a closed edge surface 1Oe that defines three adjoining parts 10a, 10b, 10c of the opening that together form the guide opening 10. Two 10a, 10b of these parts of the opening together form a guide groove in which the driving pin 11 moves in relation to the hook bolt 8 when the driving pin 11 causes the hook bolt 8 to rotate between a recessed position (Figure 2) inside the lock housing and a position (Figure 3) in which it projects from the lock housing. The width of the guide groove formed by the parts of the opening 10a and 10b, transverse to the direction of the path along which the driving pin moves in relation to the hook bolt 8 when this is rotated between its recessed and projecting positions, corresponds to the diameter of the driving pin 11. In addition, the guide groove is angled or curved, so that the direction of the path along which the driving pin 11 moves in relation to the part of the opening 10a has an angle in relation to the corresponding direction of the path in relation to the part 10b. The two parts of the opening 10a and 10b have this angled configuration in order to allow the hook bolt 8 to rotate around the pivot pin 9 when the driving pin 11 is moved in a linear direction past the pivot pin 9.

In the recessed position of the hook bolt 8 shown in Figure 2, the driving pin 11 is located at the junction between the parts of the opening 10a and 10b that form the guide groove. When the handle is turned in a clockwise direction according to the figure and the driving pin 11 is thereby moved in a linear direction upwards, during the rotation of the hook bolt 8, the driving pin 11 is first moved in a direction inwards into the opening part 10a until the driving pin 11 is located on a level with the pivot pin 9. Thereafter, the driving pin 11 moves in a direction towards the part of the opening 10b, until it finally assumes the position shown in Figure 3 where the driving pin has assumed an end position in the part of the opening 10b. In the projecting locked position of the hook bolt 8 shown in Figure 3, as a result of the configuration of the parts of the opening 10a and 10b, a self-locking of the hook bolt 8 is achieved. If a downward-directed force is applied to the hook bolt 8 outside the lock housing 1 in an attempt to force the hook bolt towards the recessed position, in order to force open the door or window, the hook bolt 8 is blocked mechanically. Such a downward-directed force attempts to rotate the hook bolt 8 in a counter-clockwise direction around the pivot pin 9. In the event of such a counter-clockwise rotation of the hook bolt, the part of the edge surface 1Oe that is located closest to the pivot pin 9 and that forms the part of the opening 10b will, however, press the driving pin in a direction obliquely outwards towards the face plate 2 and downwards. As the two pull rods 6a, 6b to which the driving pin is attached are in contact with and rest against the face plate 2, this movement of the driving pin 11 is, however, blocked and the continued rotation of the hook bolt towards the recessed position is thereby prevented.

The opening 10 through the hook bolt 8 has, in addition, an additional part 10c that constitutes a clearance groove. This extends from the junction between the two parts of the opening 10a and 10b a short way in the direction towards the tip of the hook bolt. The clearance groove is arranged to allow the driving pin 11 to move in relation to the hook bolt 8 without changing the position of the hook bolt when this is in its recessed position. The clearance groove therefore extends parallel to the longitudinal direction of the pull rods 6a, 6b and to the direction of movement of the driving pin 11 when the hook bolt is in the recessed open position, as shown in Figures 2 and 5. When the hook bolt is in the recessed position shown in Figure 2, it can be desirable to impart additional linear movement to the bolt rods 3a, 3b without affecting or changing the position of the hook bolt 8. Such movement of the bolt rods 3a, 3b can, for example, be used to activate, connect or release a brake device (not shown) that is connected to either or both of the free ends of the bolt rods 3a, 3b that face away from the lock housing.

If the window or door has been opened, with the lock having assumed the position shown in Figure 2, such a brake can be activated by turning the handle in a counter-clockwise direction, to the position shown in Figure 5. The handle follower 7 and the carrier 12 then move the bolt rod 3b and the pull rods 6a, 6b and hence the bolt rod 3a in a downward direction. Due to the design of the clearance groove 10c in the hook bolt 8, this movement of the rods 3a, 3b is made possible without rotating the hook bolt 8 or affecting its position in some other way. With this design of the opening 10 in the hook bolt 8, it is thus possible to activate a brake or the like without the hook bolt 8 being pivoted out to the projecting position and without needing to allow additional room in the lock housing 1 for the hook bolt to pivot, in order to enable the hook bolt to be rotated in an inward direction into the lock housing 1.

In addition, the lock 1 comprises a deadlocking follower 13 that can be connected, for example, to a lock cylinder (not shown). The deadlocking follower has a peripheral cam surface that comprises a first 13a, a second 13b, a third 13c and a fourth 13d part. The second part 13b is arranged at a greater radial distance from the axis of rotation of the deadlocking follower than the first part 13a, and the fourth part 13d is arranged at a greater radial distance from the centre than the third part 13c. A spring-loaded deadlocking arm, that can move in a direction towards the deadlocking follower 13, extends from the deadlocking follower 13 to the handle follower 7. At its upper end, the deadlocking arm 14 has a folded stop surface that makes contact with either the first 13a or second 13b part of the cam surface of the deadlocking follower 13. The lower end of the deadlocking arm 14 interacts with a cam segment 7d, 7e on the handle follower 7. As shown most clearly in Figure 6, the cam segment on the handle follower 7 comprises an arc- shaped part 7d of essentially constant radius and a cut-out 7e that goes radially inwards at one end of the arc-shaped part 7d.

A link arm 15 is arranged above the deadlocking follower 13 in such a way that it can pivot. The lower end of the link arm 15 is in contact with either the third 13c or fourth 13d part of the cam surface of the deadlocking follower 13. The upper end of the link arm 15 is in engagement with an indicating bolt 16 that can move in an axial direction through an opening in the face plate 2. A spring 17 urges the indicating bolt 17 in the direction inwards towards the lock housing. A permanent magnet 16a is arranged on the free end of the indicating bolt that faces away from the link arm 15.

In the position shown in Figure 2, the contact between the deadlocking arm 14 and the arc-shaped part 7d of the handle follower 7 and between the deadlocking arm 14 and the first part 13a of the cam surface of the deadlocking follower 13, prevents the deadlocking follower 13 from being rotated, if the hook bolt 8 has not assumed its fully projecting position. When the handle follower has been rotated to the position shown in Figure 3 and the hook bolt 8 has thereby assumed its fully projecting locked position, the deadlocking follower 13 is able to be rotated clockwise as shown in the figures, whereupon the second part 13b of the cam surface comes into contact with the deadlocking arm 14 so that this is pressed downwards (see Figure 4). The lower end of the deadlocking arm 14 then engages with the radial cut-out 7e on the handle follower 7 and thereby deadlocks the handle follower and hence the hook bolt in the projecting locked position.

During this deadlocking movement of the deadlocking follower 13, the lower end of the link arm 15 is also pressed in a direction away from the centre of the deadlocking follower 13, by the contact with the third part 13c and then the fourth part 13d of the cam surface. This is achieved by the third cam part 13c being eccentrically shaped and by the fourth cam part 13d being located at a greater distance from the centre than the third part 13c. By the engagement of the link arm 15 with the inner end of the indicating bolt 16, the rotating movement of the link arm 15 is transferred to an axial movement of the indicating bolt 16 in a direction outwards through the opening in the face plate. The permanent magnet 16a thereby assumes a position projecting out of the lock housing in the vicinity of the Reed contact that is arranged directly in the frame or in the striking plate, on a level with the indicating bolt 16 and its opening in the face plate 2. The Reed contact is suitably designed in such a way that it is normally closed so that a current passes through the contact, provided that the permanent magnet 16a is not located in its vicinity. When the permanent magnet assumes the position shown in Figure 4, the current through the Reed contact is broken, in order to indicate in this way that the window or door is correctly closed, locked and deadlocked. It should be noted that, with the design according to the invention that is described above, the permanent magnet can assume its position in the vicinity of the permanent magnet 16a only if all the following conditions are fulfilled: 1) The window or door is closed. 2) The hook bolt 8 is in the projecting position. 3) The hook bolt is deadlocked. It will also be recognized that, due to the interaction of the deadlocking arm 14 with the arc-shaped part 7 of the cam segment of the handle follower 7, the deadlocking follower 13 cannot assume the deadlocked position and the indicating bolt 16 cannot assume the projecting position unless the hook bolt is in its projecting position.

Figures 8-10 show another embodiment of an espagnolette according to the invention. In this embodiment, the lock also comprises a lock housing 101, a face plate 102 and a handle follower 107 that is connected to a pull rod 106 by means of a carrier 112. In contrast to the lock housing 1 shown in Figures 1-5, the lock housing 101 does not have an internal hook bolt or plunger. Instead, the espagnolette shown in Figures 8- 10 comprises an external side bolt in the form of a swing bolt 108 that is connected to the pull rod 106. In addition, the lock comprises a deadlocking follower 113 and a deadlocking arm 114 that interacts with cam surfaces on the deadlocking follower 113 and the handle follower 107 in a corresponding way to that described for the embodiment described above. This embodiment differs from what is described above, in that the indicating bolt 116 with the permanent magnet 116a is arranged below the handle follower 107 and in that the deadlocking movement of the deadlocking follower 113 is transferred to the indicating bolt 116 by means of two leaf-shaped essentially linear link arms 117, 118 that are connected together by means of an auxiliary follower 119 that is mounted in such a way that it can rotate. One end of the upper link arm 117 is connected to the deadlocking arm 114 and its other end is connected to the auxiliary follower 119. One end of the lower link arm is connected to the auxiliary follower and its other end is connected to the indicating bolt 116.

The lock shown in Figures 8-10 works in a corresponding way to the lock according to Figures 2-4 that is described above. However, the lock according to Figures 8-10 does not have a clearance device to allow movement of the pull rod 106 without affecting the position of the pivot bolt 108.

Figure 8 shows the lock when the swing bolt 108 is in the recessed open position, with the indicating bolt 116 withdrawn into the lock housing 101. Figure 9 shows the swing bolt 108 in the projecting, locked but not deadlocked position. Figure 10 shows the swing bolt in the projecting, locked and deadlocked position, in which the indicating bolt has assumed its projecting position in the vicinity of a detector in the form of a Reed contact 105 that is arranged in the frame or in the striking plate.

Two exemplifying embodiments of the invention have been described above. It will be recognized that these examples are not to be regarded as limiting the scope of the invention, this being able to be varied freely within the framework of the following claims.

For example, the Reed contact described above can be replaced by a Hall element or the like that interacts with the permanent magnet. It is also possible to avoid using the permanent magnet, by designing the detector instead as, for example, an inductive sensor for contact-free indication. It is, of course, also possible, if it is considered possible, to design the detector as a conventional switch or a micro-switch, whereby indication is achieved by the indicating bolt coming into contact with the switch and activating this.

In addition, it will be recognized that the number, design and position of the rods or bolts that engage with the frame or with a striking plate arranged in the frame can be varied freely. Examples of such rods or bolts are bolts that move at right angles to the face plate, bolts that move parallel to the face plate, such as mushroom bolts, swing bolts and various kinds of hook bolts .

In the examples described above, the movement of the follower that controls the movement of the bolt is achieved manually by means of a handle. It will, however, be recognized that the handle can be replaced by other manually-operated elements, such as knobs or the like. The movement of this follower can, of course, also be achieved automatically, for example by means of an electrical motor, an electrical actuator or the like. In a corresponding way, the movement of the deadlocking follower can also be achieved manually or automatically.

Claims

1. A lock for windows, doors and the like, comprising a first follower (7, 107), for example a handle follower, for moving a bolt (8, 108) between an open and a locked position, in which locked position the bolt can engage with a frame and a deadlocking follower (13, 113), for example a cylindrical follower or rotating follower, that can be moved between a non- deadlocked and a deadlocked position, in which deadlocked position the bolt is deadlocked in the locked position, characterized in that an indicating bolt (16, 116) is connected mechanically to the deadlocking follower and can be moved by this between a passive position and an active position, in which active position the indicating bolt can interact with a detector (5, 105) arranged at the frame in order to indicate that the window or door is in a closed position and that the deadlocking follower is in the deadlocked position.

2. The lock as claimed in claim 1, comprising a device (7d, 13a, 14, 107, 113, 114) for preventing the deadlocking follower (13, 113) from assuming the deadlocked position when the bolt (8, 108) is not in the locked position.

3. The lock as claimed in any one of claims 1 or 2, in which the indicating bolt (16, 116) comprises a permanent magnet (16a, 116a) and the detector (5, 105) comprises a Hall element or a Reed contact for contact- free indication.

4. The lock as claimed in any one of claims 1-3, comprising a lock housing (1, 101) in which the indicating bolt (16, 116) can move in an axial direction between the passive position and the active position, in which active position the indicating bolt (16, 116) projects out through an opening arranged in the lock housing.

5. The lock as claimed in any one of claims 1-4, in which the indicating bolt (16, 116) is connected mechanically to the deadlocking follower (13) by means of a pivoting link arm (15), one end of which is arranged to make contact with and to be controlled by a peripheral cam surface (13c, 13d) on the deadlocking follower (13).

6. The lock as claimed in any one of claims 1-5, in which the bolt (8) is a swing bolt that is attached in such a way that it can pivot and the lock comprises a pull rod (6a, 6b) with a driving pin (11) attached to the pull rod, which pull rod is connected mechanically to the first follower (7) in such a way that it is moved in an axial direction when the first follower (7) is rotated and which driving pin is received in an opening (10) that passes through the swing bolt, which opening has a first part (10a, 10b) that is arranged to achieve pivoting of the swing bolt between an open and a locked position when the pull rod is moved in an axial direction, which opening (10) in the pivot bolt (8) has a second part (10c) that is arranged to allow further axial movement of the pull rod (6a, 6b) without affecting the position of the swing bolt when the swing bolt has assumed the open or closed position.

7. The lock as claimed in claim 6, in which the second part (10c) of the opening is designed to allow further movement of the pull rod (6a, 6b) in the direction of the opening without affecting the position of the swing bolt (8) when the swing bolt has assumed the open position.

8. The lock as claimed in any one of claims 6 or 7, in which the opening (10) has a continuous edge surface (1Oe) and the opening and the driving pin (11) are designed in such a way that the driving pin is constantly in contact with the edge surface.

9. The lock as claimed in any one of claims 6-8, in which the first part (10a, 10b) of the opening (10) is designed to press the driving pin (11) in a direction that is not parallel to the axial direction of movement of the pull rod when the swing bolt (8) is in the closed position and a force is applied to the swing bolt (8) in the direction of the opening.

10. An espagnolette comprising a lock as claimed in any one of claims 1-9.