WO1986002690A1

WO1986002690A1 - Device in electrically triggerable striking plates

Info

Publication number: WO1986002690A1
Application number: PCT/SE1984/000363
Authority: WO
Inventors: Gösta Ture Harry ENQUIST
Original assignee: ANCHOR ESKILSTUNA AB
Current assignee: ANCHOR ESKILSTUNA AB
Priority date: 1983-04-29
Filing date: 1984-10-29
Publication date: 1986-05-09
Anticipated expiration: 1987-04-29
Also published as: SE8302448D0; SE8302448L; SE442418B

Abstract

A device in electrically triggerable striking plates coacting with a member such as is included in a door lock, the striking plate including an electric coil (3) with a moving armature (5), a detent element (7) actuable by the armature, and a pivoting bolt means (2, 9) engaging with said member, this means permitting or preventing the movement of the member away from the striking plate in response to whether the coil is energized or not. An intermediate element (9) coacting with the pivoting bolt and the blocking element takes up forces transferred via the pivoting bolt to the blocking element when said member strives to pivot the pivoting bolt from its position latched by the detent element. The detent element is removably mounted in the striking plate in one of two optional positions such that the striking plate can be optionally triggered when the coil is energized or when it is deenergized.

Description

DEVICE IN ELECTRICALLY TRIGGERABLE STRIKING PLATES

DESCRIPTION Technical Field

The present invention relates to a device in electrically triggerable striking plates e.g. such as cooperate with a member included in a door lock, the striking plate including an electric coil with a moving armature, a detent element actuated by the armature and a pivoting bolt which permits or prevents movement of the member

from the striking plate in response to whether the coil is energized or not. Background Art

Devices of the kind described above are already known, and have been found to function satisfactorily in cases where the pivoting bolt locked by the detent element is not subjected to too great actuation forces via the member, which is usually the bolt of a door lock. However, if the pivoting bolt is subjected to large stresses, it and or the detent element can be deformed, resulting in possible defective function of the lock¬ ing plate. Since the contact surfaces between the detent element and the pivoting bolt are also very small, it will be understood that these details must be manufactured with great dimensional accuracy and of high-quality material and that they must be fitted without play in the striking plate in order that they will be able to take up large forces on their surfaces. If the known striking plates are constructed such that they are triggered when current is supplied to the electric coil, they cannot be reset so that they are triggered when the current to the coil is interrupted, and vice versa, but must be exchanged for another striking plate.

Several of the known striking plates furthermore require a large number of fastening means, particularly screws, to retain the different details of the plate in fixed positions. Disclosure of the Invention

One object of the present invention is to at least partially overcome the drawbacks with previously known striking plates of the kind in question, and to provide a device in which the details of the striking plate, acted on by forces exercised by the bolt of a lock, have the forces distributed so that these details are not subjected to detrimentally large stresses, and where the device can be readily modified for optionally being triggered when the current circuit to the coil is either open or closed.

This and other objects are satisfied by the device in accordance with the invention being given the characterizing features disclosed in the claims. Description of Figures

Fig. 1 is a perspective view of a striking plate including the device in accordance with the invention,

Fig. 2 is a perspective view of parts of the device in Fig. 1 in a locked position, and

Fig. 3 is a perspective view of the parts illustrated in Fig. 2 in a released or triggered position. Preferred Embodiment In Figure 1 there is illustrated a striking plate 1 , intended for fitting into a vertical door jamb so that the flat upper side 1a of the striking plate illustrated in Fig. 1 will be situated substantially flush with the face of the jamb and opposite a conventional lock bolt in a lock fitted to a door leaf. Cover plates (unillustrated) are intended to protect the upper side 1a and front side 1b of the striking plate in Fig. 1 , although not the portion of it including a pivoting bolt 2, which is pivotably mounted in the striking plate and biased in a clockwise direction in Fig. 1 by an unillustrated spring, so that the rear edge 2a of the pivoting bolt engages against an edge 1a' on the striking plate.

An electric coil 3 is attached inside the striking plate with the aid of a holder 4, and includes a central iron core, situated directly opposite an armature 5, which is spring-biased anti¬ clockwise and pivotable about a shaft 6 fixed in the striking plate. The pivoting movement is limited by the iron core of the coil and by a wall 1c in the striking plate 1.

A detent slide 7 with a U-shaped cross section can reciprocate longitudinally in a space in the striking plate, with guidance by the walls such as 1d, 1e and 1f thereof, and the unillustrated cover plate on the front side 1b of the striking plate. The detent slide 7 is provided with several recesses. A recess 7a in the slide is made to suit a stud 8 on the armature 5. Recesses 7b and 7c in the slide are mutually spaced such that one, 7c, is situated opposite a projection 9a on an intermediate element 9. The intermediate element 9 engages, on its edge facing away from the projection, in an elongate groove 1g (Figs. 2 and 3) in the bottom (rear side) of the striking plate, and is pivotable about this edge. The projection 9a is urged into a recess 2b in the pivot¬ ing bolt 2 by an unillustrated spring, which also maintains the intermediate element removably in place. On either side of the projection 9a the intermediate element 9 is provided with chamfered edges 9b and 9c, which are parallel and contiguous to two edges 2c and 2d on either side of the recess 2b on the pivoting bolt 2.

The function of the device in accordance with the invention and further details included in it will now be described. The condition is illustrated in Fig. 1 where the door lock bolt is inserted in a recess 2e in the pivoting bolt 2, which is latched against pivoting. If it is now attempted to pivot the pivoting bolt 2 anti-clockwise (towards the observer) via the door lock bolt, the edges 2c and 2d on the pivoting bolt will press the intermediate element 9 via its chamfered edges 9b and 9c out from the recess 2b in the bolt 2 so that the projection 9a is displaced towards the detent slide 7. This displacement can only continue for a very short distance and ceases long before the edges 2c, 2d and 9b, 9c have relinquished contact with each other, due to the projection 9a abutting against the edge of the detent slide 7 situated to the right of the recess 7c. When the projection 9a has come into engagement against the detent slide 7, continued, increased pressure against the pivoting bolt results in that the projection is pressed harder against the detent slide, but the surface pressure between these two details will be insignificant, in spite of the surfaces being small, since the largest compressive force from the pivoting bolt is taken out by the edges 9b and 9c on the intermediate element, and are taken to the bottom of the groove Ig in the striking plate 1. When the coil 3 is energized, its core attracts the armature 5, the stud 8 then pulling the detent slide 7 to the right in Fig. 1 so that the recess 7c is placed exactly opposite the projection 9a. If the pivoting bolt 2 is now subjected to a compressive force by the door lock bolt, the pivoting bolt is pivoted, and its edges 2c and 2d press the intermediate element 9 downwards in Fig. 1, via the edges 9b.and 9c, so that the projection 9 is inserted into the recess 7c (Fig. 3). When this has taken place, the edges 2c, 2d leave the edges 9b, 9c and the pivoting bolt 2 can be further pivoted anticlockwise (towards the observer in Fig. 1) by the door lock bolt until the latter has reliquished engagement with the recess 2e of the pivoting bolt, whereon the pivoting bolt is returned by spring bias to the position illustrated in Fig. 1. After this, or immediately after the projection 9a has been inserted in the recess 7c, the coil 3 can be deenergized, and when the projection 9a has left the recess 7c the armature 5 returns the detent slide 7 to its latching position illustrated in Fig. 1. If the pivoting bolt 2 is to be kept latched when the coil 3 is energized and is to be released when the coil is deenergized, the device in accordance with the invention can be modified in a simple way without any exchange of parts or time-consuming work being required. To achieve this modification, the un¬ illustrated plate covering the front side 1b of the striking plate is removed, the detent slide 7 is lifted away from the striking plate and the stud 8 of the armature 5 and is turned 180 about an axis at right angles to the plane of the slide, after which the slide is reinserted in the striking plate so that the recess 7b is situated adjacent the projection 9a, and a recess 7d corresponding to the recess 7a accommodates the stud 8. After this rearrangement the covering plate is screwed back onto the striking plate.

In the last mentioned position of the detent slide 7, the projection 9a can be inserted in the recess 7b in spite of the armature 5 not being attracted by the coil 3, and the pivoting bolt 2 can be pivoted un- hindered by a door lock' bolt (Fig. 3) . When the coil 3 is energized the armature 5 is attracted and moves the detent slide 7 to a position where an edge on the slide adjacent the recess 7b is situated opposite the projection 9a, the pivoting bolt 2 thus being latched against pivoting. This last-mentioned position is illustrated in Fig. 2. As will be seen from a comparison of Figs. 1 and 2, the projection 9a in Fig. 1 is situated opposite the portion of the slide 7 situated to the right of the recess 7c, while'this recess in Fig. 2 is situated opposite the portion of the slide 7 to the left of the recess 7b. As should have been understood from the above, this is caused by the coil 3 being deenergized in the arrangement according to Fig. 1 , while it is energized in the arrangement accord¬ ing to Fig. 3.

Although only one embodiment of the invention has been described above and illustrated on the drawings, it should be understood that the invention is not limited to this embodiment, but only by the disclosures in the claims.

Claims

1. Device in electrically triggerable striking plates coacting with a member such as is included in a door lock, the striking plate including an electric coil (3) with a moving armature (5) , a detent element (7) actuable by the armature, and a pivoting bolt means (2, 9) engaging with said member, this means permitting or preventing the movement of the member away from the striking plate in response to whether the coil is energized or not, characterized in that the detent element (7) is removably mounted in the striking plate and provided with two mutually spaced recesses (7b, 7c) , a part (9a) of the pivoting bolt means (2, 9) being insertable in the one recess (7c) when the coil (3) is energized, this part being insert- able in the other recess (7b) when the coil is de¬ energized, and after the detent element has been removed from the striking plate and replaced in it with a different orientation.

2. Device as claimed in claim 1, characterized in that the detent element comprises a linearly reciprocating slide (7) moving between guide surfaces on the striking plate, the armature (5) being pivotably coupled to said slide, which is removable from the striking plate when a cover plate for the latter has been removed.

3. Device as claimed in claim 1 or 2, characterized in that the pivoting bolt means includes a pivoting bolt (2) and an intermediate element (9) coacting with the bolt and the detent element (7) , said intermediate element taking up compression forces, transferred to the detent element via the pivoting bolt, along a substantial part of the length of the pivoting bolt and the intermediate element, when said member strives to pivot the pivoting bolt from its position latched by the detent element.

4. Device as claimed in claim 3, characterized in that the intermediate element (9) is pivotably mounted in the striking plate (at 1g) and is provided with at least one edge (9b, 9c) engaging with the pivoting bolt (2) and taking up pressure, as well as with a projection (9a) which is insertable in a recess (7b; 7c) in the detent element (7) against spring bias when the element assumes its non-latching position.