JP2012215011A - Locking detection mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking detection mechanism capable of surely detecting the locking of an automatic lock, namely, greatly operation-reliable, and excellent in durability.SOLUTION: A trigger lever 4 is provided which is guided movably in the longitudinal direction perpendicular to a front plate 2 while passing through the front plate of a lock box. A locking lever 5 is provided in the lock box near the head of a dead bolt. the locking lever 5 is borne turnably in a plane parallel to the side plate of the lock box by a locking lever shaft 6, and has at least a front end facing a step portion of the head of the dead bolt in an engageable manner and an engaging end for engaging with the inner end of the trigger lever through the front side. On the other hand, a permanent magnet 11 is mounted at the front end of the locking lever, and a magnetism detecting element 12 is fixed into the lock box on the opposite side to the dead bolt with relation to the permanent magnet.

Description

  The present invention relates to a lock detection mechanism (hereinafter simply referred to as a lock detection mechanism) mounted on a so-called automatic lock, and more particularly to a lock detection mechanism that can reliably detect locking and has excellent durability.

  The lock detection mechanism is to extract that the lock is locked as an electric signal and is usually configured as a part of the function of the electric lock, but it is also a lock box with a mechanical cylinder lock. Of course it can be installed.

  For example, when the lock detection mechanism is provided in a management room of a building, the lock state of a large number of rooms can be seen at a glance while staying in the management room, which is very convenient for building management.

Applicant company drawings

  As shown in FIG. 5, the automatic locking system includes a mechanical type and one controlled by an electromagnetic actuator, and passes through the front plate 2 of the lock box 1 in the front-rear direction (in FIG. 5). A dead bolt 3, a trigger rod 4, and a locking lever 5 guided so as to be movable in the left-right direction) are provided.

  For example, as shown in FIG. 3, the locking lever 5 is a substantially T-shaped plate-like body, and is rotatably supported around a locking lever shaft 6 in a plane parallel to the lock box side plate. 5 so that the elastic force of the locking lever spring 7 makes it possible to engage in the counterclockwise direction in FIG. 5, that is, the front end (left end in FIG. 5) of the locking lever engages with the step between the dead bolt head of the dead bolt 3 and the dead bolt shaft. It is energized.

  On the other hand, the trigger rod 4 is guided so as to be movable in the front-rear direction perpendicular to the front plate 2 like the dead bolt 3, and the lower end of the locking lever 4 is engaged with the inner end of the trigger rod 4 from the front. .

  Therefore, when the trigger 杆 4 is pushed into the lock box 1 when the door is closed, the locking lever 4 is rotated counterclockwise by the biasing force, that is, its front end rides on the step of the dead bolt 3, In this state, when the door is closed and the dead bolt 3 is inserted into the dead bolt hole of the door frame, the dead bolt suddenly moves forward, and the front end of the locking lever engages with the stepped portion of the dead bolt. The deadbolt cannot be retracted into the lock box. That is, the deadbolt is automatically locked.

  As is clear from the above description, the locking signal is obtained by detecting the counterclockwise rotation of the locking lever. For example, the locking detection mechanism configured to directly drive a microswitch or the like by the locking lever is Since it is driven by a weak locking lever spring, the operation becomes unstable, and the mechanism around the locking lever is clogged and it is difficult to install a locking detection mechanism.

  Accordingly, an object of the present invention is to propose a locking detection mechanism that is simple in structure, reliable in operation, and excellent in durability.

  In order to achieve the above object, the present invention provides a trigger rod guided through the front plate of the lock box so as to be movable in the front-rear direction perpendicular to the front plate. In the lock box in the vicinity, supported by a locking lever shaft so as to be rotatable in a plane parallel to the lock box side plate, at least on the front end facing the stepped portion of the dead bolt head and the inner end of the trigger rod A locking lever formed with an engagement end to be engaged from the front is provided, and on the other hand, a permanent magnet is attached to the front end of the locking lever, and a magnetism detecting element is placed in the lock box on the opposite side of the dead bolt with respect to the permanent magnet. The permanent magnet and the magnetism detecting element come close to each other when unlocked and locked, and the magnet and the magnetism detecting element are separated when the front end of the locking lever comes close to the dead bolt.

  In the locking detection mechanism according to one embodiment of the present invention configured as described above, a permanent magnet is attached to the front end portion of the locking lever, and a magnetism detecting element is fixed to a portion of the permanent magnet opposite to the dead bolt. The structure is simple because it has only been done.

  In addition, since the locking can be detected by distinguishing the proximity and separation between the permanent magnet and the magnetism detecting element, the operation as the locking detection mechanism is reliable.

  Furthermore, the force applied to the joint between the permanent magnet and the magnetic sensing element is a slight amount that does not exceed the urging force of the locking lever, and since no collision occurs, various effects such as excellent durability, etc. Play.

The side view of the electric lock provided with the lock | rock detection mechanism by this invention. The enlarged front view of the principal part of a locking detection mechanism shows an unlocked state. FIG. 3 is an enlarged front view similar to FIG. 2, showing a state where the permanent magnet is slightly separated from the magnetism detecting element. It is an enlarged front view similar to FIG. 2, and shows a locked state. The side view of the conventional automatic locking lock.

  Locking detection with reliable operation with a simple structure in which a permanent magnet is attached to the front end of the locking lever of the automatic locking and a magnetism detecting element is fixed in the lock box on the opposite side of the dead bolt. The mechanism could be configured.

An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 3 denotes an electric lock deadbolt, and reference numeral 8 denotes a latch bolt. Since the configuration and operation of these deadbolt 3 and latch bolt 8 are not the gist of the present invention, further detailed description is omitted. To do.

  A trigger rod 4 is disposed near the front plate 2 of the lock box 1 and between the dead bolt 3 and the latch bolt 8.

  The trigger rod 4 is, for example, a thick plate material with a horizontal projection shape protruding outside the front plate 2 and is movable in the front-rear direction (left-right direction in FIG. 1) penetrating the front plate 2 and perpendicular thereto. Guided.

  And it is urged | biased by the direction which protrudes ahead (leftward in FIG. 1) with the elasticity of the trigger spring 9. As shown in FIG.

  The trigger bar 4 engages with a door frame (not shown) at the time of locking and is pushed into the lock box, and the movement of the trigger bar 4 is used to control the functional blocks in the lock box. Since the configuration and function of 4 itself are well known, further detailed description is omitted.

  On the other hand, the fact that the locking lever 5 is disposed in the vicinity of the dead bolt 3 in the front in the lock box 1 is the same as the above-described conventional automatic locking.

  Similar to the above-described conventional automatic locking, this locking lock 5 is supported so that its central portion can be rotated around the locking lever shaft 6, and the elasticity of the locking lever spring 7 mounted on the locking lever shaft 6. 1, the front end (left end in FIG. 1) of the locking lever 5 is urged so as to be engageable with the step between the dead bolt head of the dead bolt 3 and the dead bolt shaft.

  As shown in FIGS. 2 to 4, the locking lever 5 is a substantially T-shaped plate-like body, and is supported around the locking lever shaft 6 so as to be rotatable in a plane parallel to the lock box side plate. Has been.

A permanent magnet 11 is attached to the front end of the locking lever 5 (see FIGS. 1 to 4).
The permanent magnet 11 in the illustrated embodiment forms a horizontal shelf by bending the front end of the locking lever 5 by 90 degrees, and the permanent magnet 11 is placed and fixed on the shelf.

  Further, with respect to the permanent magnet 11, a magnetism detecting element is fixed in a lock box on the opposite side to the dead bolt.

  The interval between the magnetism detecting element 12 and the permanent magnet 11 naturally changes depending on the angular position of the locking lever 5, but when the door is opened and the trigger rod 4 protrudes to the maximum reduction as shown in FIG. It is set to be the minimum as shown in FIG.

  As in the conventional automatic locking shown in FIG. 5, the engaging end at the lower end of the locking lever 5 is engaged with the inner end of the trigger rod 4 from the front.

  The locking detection mechanism according to one embodiment of the present invention configured as described above has a permanent magnet 11 and a magnetic sensing element 12 in the opened state shown in FIG. 1 and in FIG. 2, in other words, in the unlocked state of automatic locking. For example, if the magnetic detecting element 12 such as a reed switch is closed at this time, the output signal of the magnetic detecting element corresponding to the Heisei of the reed switch is taken out as an unlock signal, For example, it is supplied to a control device in a building management room.

  When the door is closed, the dead bolt 3 is temporarily pushed into the lock box 1 and at the same time, the trigger rod 4 is also pushed into the lock box 1. As the trigger rod 4 moves, the dead bolt 3 is locked as shown in FIGS. The angular position of the lever 5 changes.

  That is, the distance between the permanent magnet 11 and the magnetism detecting element 12 increases monotonously from the open state shown in FIGS. 1 and 2 to the intermediate state shown in FIG. 3 and the closed and locked state shown in FIG.

  And in the state shown in FIG. 4, the front-end | tip of the locking lever 5 rides on the intermediate | middle step part of the front-end | tip part of the dead bolt 3. As shown in FIG.

  Before that, since the output signal from the magnetic sensing element 12 disappears, this output signal is taken out as a locking signal.

DESCRIPTION OF SYMBOLS 1 Lock box 2 Front plate 3 Dead bolt 4 Trigger rod 5 Locking lever 6 Locking lever shaft 7 Locking lever spring 8 Latch bolt 9 Trigger spring 11 Permanent magnet 12 Magnetostatic element

Claims (1)

  A trigger rod is provided so as to penetrate the front plate of the lock box so as to be movable in the front-rear direction perpendicular to the front plate. On the other hand, a lock lever shaft is provided in the lock box near the head of the dead bolt. A front end that is rotatably supported in a plane parallel to the box side plate and faces at least the stepped portion of the dead bolt head and an engagement end that engages from the front to the inner end of the trigger rod are formed. A locking lever is provided, and on the other hand, a permanent magnet is attached to the front end of the locking lever, and a magnetism detecting element is fixed in the lock box on the opposite side of the dead bolt with respect to the permanent magnet, and these permanent magnets are detected when unlocked. A locking detection mechanism characterized in that a magnet and a magnetism detecting element are separated from each other when the magnetic element is close and locked, and the front end of the locking lever is close to a dead bolt.

Images