Monitoring device

Abstract

The invention relates to a monitoring device with a fitting-integrated monitoring unit (1) comprising a number of sensor units (15), wherein the monitoring unit (1) is connected to an evaluation unit on the signal or data side, and wherein the sensor units (15) comprise at least one opening or closing sensor designed as a reed contact (16) which interacts with a magnet (17), causing a change in the switching state of the sensor unit (15) when a bolt (2) enters a strike plate opening (9). To provide a simple, tamper-proof, and error-resistant design of the monitoring device, which also ensures reliable locking even with an automatic lock with a spring- or gravity-operated bolt, it is provided that the bolt (2) engages next to the magnet (17) and the sensor (15) when entering the strike plate opening (9).

Description

[0001] The invention relates to a monitoring device according to the preamble of claim 1.

[0002] A monitoring device of this type is already known from DE 202013006372 U1. This monitoring device provides a frame-side bolt engagement into which a pivotable bolt, attached to the sash side, engages. The bolt thus moves between a magnet located in the bolt engagement and a sensor. The sensor detects the bolt's position. This solution allows for reliable detection of the closed position. By arranging the sensor and magnet on both sides of the bolt, the space required for the bolt's engagement is reduced. To ensure smooth engagement of the bolt, its thickness could be reduced, but this would reduce its stability.

[0003] From DE 2343594 A1, another monitoring device is known. This known device relates to an alarm system for accident prevention and aims to activate the accident or burglary prevention devices installed in the building via an electrical contact when a door lock is engaged. To ensure tamper-proof operation, a number of sensor units are provided, which are connected to an evaluation unit via signal or data transmission. Each sensor unit includes at least one opening and closing sensor. The sensor unit is designed to include at least one reed switch that interacts with a magnet. Finally, the device is designed so that the bolt, when it enters the strike plate opening, causes a change in the switching state of the sensor unit.In this case, the interaction of the magnet on the bolt side and the reed contact on the strike plate side after a certain period of time is not guaranteed.

[0004] A similar contact device is known from DE 3324189 C2, in which the bolt in the locking position abuts a contact on the strike plate side when the bolt enters the strike plate opening on the frame side. This design requires precise alignment of the bolt relative to the frame, which is not reliably ensured, particularly after a certain period of time, due to unavoidable settling movements of the sash.

[0005] DE 19914568 C2 proposes that the magnet is guided at a predetermined distance from the reed contact, the reed contact comprising several sensors to make manipulation by external magnets more difficult.

[0006] DE 29615497 U1 also proposes a tamper-proof design by using two offset reed contacts that can be assigned to a magnet. The first reed contact is a normally open contact, while the second reed contact makes tampering more difficult because the magnet must trigger both contacts in a specific way to legitimately activate the contact. The contacts are intended to have different sensitivities. A similar design is also disclosed in DE 4113665 C2. DE 9115266 U1 also proposes several signal sensors that are intended to prevent tampering in conjunction with magnetic shielding.

[0007] In contrast, EP 0720136 B1 proposes to equip the bolt engagement with several signaling contacts in the form of non-contact reed contacts, the sensitivities and arrangement of which in relation to a signaling magnet can be used to determine the closing and locking state.

[0008] DE 29615497 U1 also proposes a tamper-proof design by using two offset reed contacts that can be assigned to a magnet. The first reed contact is a normally open contact, while the second reed contact makes tampering more difficult because the magnet must trigger both contacts in a specific way to legitimately activate the contact. The contacts are intended to have different sensitivities. A similar design is also disclosed in DE 4113665 C2. DE 9115266 U1 also proposes several signal sensors that are intended to prevent tampering in conjunction with magnetic shielding.

[0009] In contrast, EP 0720136 B1 proposes to equip the bolt engagement with several signaling contacts in the form of non-contact reed contacts, the sensitivities and arrangement of which in relation to a signaling magnet can be used to determine the closing and locking state.

[0010] The object of the invention is to provide, starting from the first-mentioned device, a simple, tamper-proof and error-free design of the monitoring device, which also enables secure locking on a permanent basis with an automatic lock with a spring- or gravity-operated bolt.

[0011] If the monitoring device is designed according to the features of the main claim, the simple and inconspicuous construction of the frame-side strike plate is retained, and the magnetic field is influenced by the bolt engaging the strike plate, so that the sensor signal can be evaluated according to the bolt's position. This arrangement allows the bolt to engage with minimal force, thus achieving maximum penetration depth even when the bolt is only forced into its locking position by a spring. This enables its use in an automatic locking mechanism where the bolt(s) are moved by a spring-loaded and / or gravity-loaded drive rod.The closed design of the strike plate and the bolt, which has no recess for a magnet, allows for a more robust design of the bolt location and a suspicion-free sensor arrangement, which makes it more difficult to manipulate the monitoring device when the sash is open.

[0012] A further development of the invention provides that the bolt is a metal pivot bolt whose thickness along an axis running perpendicular to the frame is less than the clear width of the bolt engagement. This results in the strike plate being engaged behind the bolt, thus creating a solid locking mechanism for both hinged and sliding sashes.

[0013] If the locking mechanism has a molded insert and the magnet is attached to the molded insert, this is advantageous for the function of the locking mechanism and the monitoring device. Furthermore, simple and cost-effective manufacturing using plastic is possible.

[0014] Further advantageous features emerge from the figures. It shows: Fig. 1 shows a side view of a locking device with monitoring device in the locked position, omitting the sash, frame and locking rail; Fig. 2 shows a section along line II-II in Fig. 1 , Fig. 3 a top view of the bolt engagement without the bolt, Fig. 4 a longitudinal section through the bolt engagement with the secondary lock case closed, and Fig. 5 a top view of the bolt engagement.

[0015] The in Fig. 1 The depicted monitoring device with a fitting-integrated monitoring unit 1 is illustrated by the bolt 2 of a secondary lock case 3 and an associated bolt engagement 4. As shown by the Fig. 4The bolt 2 is designed as a hook bolt, which is pivotable about an axis 6 via a drive rod and a non-essential drive of the secondary lock case 3. Due to this design, the bolt 2 pivots into the bolt engagement 4, whereby a hook extension 7, pointing upwards in the locked position, engages behind an edge 8 of the strike plate opening 9 of a strike plate 10. The metal strike plate 10 forms a cover as a base plate and the most mechanically robust part of the bolt engagement 4. In addition to the strike plate opening 9, the strike plate 10 has, in the exemplary embodiment, at least one further opening for a bolt (not shown). A molded insert 12 is assigned to the rear of the strike plate 10 to line the strike plate opening 9 and the opening. The molded insert 12 forms pockets 13 for receiving the bolts 2.This lines the frame recesses required for the entry of the second bar.

[0016] From the Fig. 1 It is still recognizable that the bolt engagement 4 includes a sensor unit 15 with an opening / closing sensor. This unit consists of a reed switch 16 that interacts with a magnet 17. Depending on the design of the associated evaluation unit (not shown here), the reed switch 16 can be configured as a normally open, normally closed, or changeover contact. The magnet 17 and the reed switch 16 are arranged laterally in the pocket 13, so that the bolt 2, in its closed position, engages laterally next to the reed switch 16 and magnet 17. The magnet 17 and the reed switch 16 are therefore located on the same side of the bolt 2 in the pocket 13. As a result, the solidly constructed bolt 2, in its engaged position, influences the magnetic field lines FL emanating from the magnet 17. Fig. 3), so that the reed contact 16 changes its switching state. The sensor unit 15 remains largely invisible, as the bolt 2 does not contain any visible magnet or similar component. Furthermore, the bolt 2 can be easily manufactured as a single piece without additional machining. The sensor unit 15 can be retrofitted by simply replacing the bolt engagement on the frame side.

[0017] From the Fig. 2 It is evident that the width 18 of the bar 2 is significantly smaller than the pocket width 19 ( Fig. 3 ).

[0018] Depending on the design of the associated evaluation unit (not shown here), the reed contact 16 can be configured as a normally open, normally closed, or changeover contact. The sensor unit 15 remains largely invisible, as the bolt 2 does not contain a magnet or similar component. Furthermore, the bolt 2 can be easily manufactured as a single piece without additional machining. The sensor unit 15 can also be retrofitted by simply replacing the frame-side bolt engagement 4.

[0019] To ensure the interaction of the sensor unit 15 with the latch 2, it is advisable to correct any relative positional deviations between the latch 2 and sensor unit 15 immediately during assembly and again after a certain period of time once the sash has settled, should manufacturing inaccuracies occur. The magnet 17 is attached to the mold insert 12. The mold insert 12 is made of a non-magnetic material. Manufacturing it from plastic allows for cost-effective and inexpensive production. The magnet 17 and its effect on the sensor unit 15 can be tested in a simple test device. If the signal from the sensor unit 15 deviates from a standard value without the latch 2, the assignment must be corrected.

[0020] As from the Fig. 2The bar 2 is visibly designed to taper towards the hook extension 7. The thickened shaft of the bar 2, when optimally adjusted, lies next to the magnet 17 and measurably deflects the magnetic field lines FL. Therefore, it is advantageous for the magnet 17 to be positioned at the lower pivot point of the pocket 13.

[0021] Fig. 4 Figure 1 shows the secondary lock case 3 and the bolt engagement 4. The bolt engagement 4 is shown in longitudinal section. It can be seen that two pockets 13 and 21 are provided. Pocket 13 is for the engagement of the bolt 2. Pocket 21 is for a cylindrical bolt that projects perpendicularly from the secondary lock case 3, advancing towards the strike plate 10. The cylindrical bolt has chamfers which, when inserted into the strike plate 10, align and secure the sash relative to the frame. The formwork insert is attached to a metal rail by means of the fastening elements 23. Reference symbol list

[0022] 1 Monitoring unit 2 Bolt 3 Auxiliary lock case 4 Bolt engagement 5 Drive rod 6 Axle 7 Hook extension 8 Edge 9 Strike plate opening 10 Strike plate 12 Mold insert 13 Pocket 15 Sensor unit 16 Reed contact 17 Magnets 18 Width 19 Pocket width 20 Cable 21 Pocket 22 Drill holes 23 Fasteners FL Field line

Claims

1. Monitoring device with a fitting-integrated monitoring unit (1) comprising a number of sensor units (15), wherein the monitoring unit (1) is connected to an evaluation unit on the signal or data side, wherein the sensor units (15) comprise at least one opening or closing sensor designed as a reed contact (16) which interacts with a magnet (17), and a bolt (2) upon entering a strike plate opening (9) causes a change in the switching state of the sensor unit (15), characterized by that the bolt (2) when entering the strike plate opening (9) next to the magnet (17) and the sensor (15).

2. Monitoring device according to claim 1, characterized by that the bolt (2) is a metal pivot bolt whose thickness along an axis perpendicular to the frame is less than the pocket width (19) of the pocket (13).

3. Monitoring device according to claim 1 or 2, characterized by that the locking mechanism (4) has a molded insert (12) and the magnet (17) is attached to the molded insert (12), 4. Monitoring device according to one of claims 1 to 3, characterized by , wherein the magnet (17) is slidably guided in the mold insert (12).

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