GB2036156A

GB2036156A - Fastening bolts for doors

Info

Publication number: GB2036156A
Application number: GB7847223A
Authority: GB
Original assignee: Joli Safe A S
Current assignee: Joli Safe A S
Priority date: 1978-12-05
Filing date: 1978-12-05
Publication date: 1980-06-25
Also published as: GB2036156B

Abstract

This invention relates to lock mechanisms for doors. Keeper portion (12a, 12b) in the edge portion (11) of a door can be engaged by fastening bolt (13) pivotably mounted about a vertical axis in the door frame for swinging into and out of the path of the swing of the door by means of a control mechanism in door frame. An actuating link (16) of the control mechanism is pivotably mounted about vertical axis (18) at the inner edge of the door frame. The bolt (13) has a longitudinal guide slot (13e) for receiving a guide member (21) at end of the actuating link 16. <IMAGE>

Description

SPECIFICATION Lock mechanisms for doors This invention relates to lock mechanisms for doors, especially for doors of safes, safe deposits and the like.

Various lock mechanisms of this type are known where in order to be able to prevent unintentional bursting open of the door, for example, in connection with a break-in attempt or due to the safe or the like falling down one or more storeys of a house during a fire or other circumstances, there is a need to design the lock mechanism in a robust but, at the same time, simple and uncomplicated manner. In the previously known constructions, the lock mechanism is often vulnerable to faulty functioning during normal use and/ or vulnerability to break-in attempts.

It is an object of the present invention to provide a lock mechanism which is especially simple and robust and, at the same time, operatively reliable and relatively secure against break-ins.

According to the present invention a lock mechanism for doors, especially for doors of safes, safe deposits and the like, comprises a rounded-off lock member portion in a side edge portion of the door leaf adapted to be closed off by means of a locking bar pivotably mounted in the door frame for pivoting into a locking position by swinging inwardly into and pivoting into a released position by swinging outwardly from the path of swing of the door leaf by means of an adjustment mechanism in the door frame, said locking bar being pivotably mounted about a vertical, stationary pivotal axis at an outer portion of the door frame while an associated actuating member included in the adjustment mechanism is pivotably mounted about a vertical, stationary pivotal axis at an inner portion of the door frame, the pivotal axes of the locking bar and the actuating member each being arranged on its respective side of a main plane through the door frame, and said locking bar reckoned in the radial direction being of elongate form and relatively narrow and having a radially extending guide slot for the reception of a vertically directed guide member at the end of the actuating member projecting freely outwards and said locking bar in said locking position extending obliquely inwards towards the lock member portion of the door leaf and crossing the outer path of swing of the door leaf at a relatively small angle while the actuating member extends obliquely outwards towards the free end of the locking bar and transversely of the outer path of swing of the door leaf.

By supporting both the locking bar and actuating member each in its respective stationary axis, the locking bar and the actuating member can be supported in a simple and robust manner in the desired locking position and by swinging the actuating member the locking bar can be readily and reliably adjusted correspondingly by means of the associated regulating element.

It is preferred that the locking bar and the guide member have a considerable vertical dimension, preferably the whole of the height of the door, and that the guide member is supported in a first region by the actuating member and in remaining regions by support members which run parallel to the actuating member and are rigidly connected to the pivotal axis of the actuating member.

In this way, an effective and reliable support of the locking bar over the height of the door can be ensured, with a corresponding smaller possibility of the bursting open of the door in an unintentional manner along with attaining a uniform actuation of the locking bar in both the locking position and during swinging of the locking bar.

In a particularly favourable construction, the locking bar is designed with an elongate 0-, D- or like closed cross-section, the major axis of which extends radially outwards from the pivotal axis of the locking bar. Moreover, the locking bar having a suitable intermediate space in the vertical direction is provided with laterally directed slots for the reception of the actuating member and the support members in the afore-mentioned linkage connection with the locking bar.

By means of the elongate pipe cross-section of the locking bar, with the major axis extending at right angles to the pivotal axis of the locking bar, significant strength of the locking bar in its radial direction can be ensured. If the loading longitudinally on the locking bar should exceed the cross-sectional strength of the pipe, a favourable deformation of the elongate pipe cross-section can, however, be obtained to a more circular cross-section or a more laterally extended cross-section so that the pipe cross-section can be caused to fill out the gap between the door frame and the lock member portion of the door leaf. In this way, there can be produced a favourable self-locking wedging of the locking bar which counteracts further bursting open of the door.

In order that the invention can be more clearly understood, a convenient embodiment thereof will now be described, by way of example, with reference to the accompanying drawings in which: Figures 1-4 show in horizontal section four different phases of the adjustment of various portions of the locking mechanism, Fig. 1 illustrating the door in the locked position with the lock mechanism in a ready locked condition, Fig. 2 illustrating the lock mechanism after blocking of the locking bar is raised, Fig. 3 illustrating the lock mechanism in readiness for swinging of the locking bar and Fig. 4 illustrating the locking bar in a released position.

In the illustrated embodiment, main emphasis is placed on the lock mechanism per se and the associated parts. Only portions of a safe or the like are indicated since the lock mechanism is considered to be applicable to various types of safety doors, for example, doors of fireproof lockers, cabinets secure from break-in, safe deposits etc. The safe or the like can have different heights and breadths as required.

Referring to the drawings, only a horizontal section of the lock mechanism is shown arranged in the one door frame portion 10 just by the adjacent end of the free-ended side edge portion 11 of the door leaf.

The side edge portion 11 of the door leaf is provided with two obliquely extending, mutually aligned surfaces 11 a and 11 b and an intermediate concave surface formed by two surface portions 1 2a, 1 2b which meet at an angle of about 120 . In the cavity which is formed by the concave surface 1 2a, 1 2b and which constitutes the lock member portion of the door leaf, there is shown, in Figs. 1-3, a locking bar 1 3 which with end portion 1 3a forms a support against the surface portion 1 2a. Side surfaces 1 3b, 1 3c of the locking bar have a length (in the plane of the drawings) corresponding to the equivalent dimension of the surface portion 1 2b. The opposite end 1 3d of the locking bar is firmly connected to a pivot shaft 14 which extends the vertical length of the door frame.The locking bar 1 3 or the lock member portion 1 2a, 1 2b extend similarly the whole vertical extent of the door leaf and the pivot shaft 14 is pivotably mounted in pivot bearings 15, of which only one pivot bearing is indicated in the drawings, with a suitable mutual intermediate space.

The opposite side edge portion (not shown) of the door leaf can be designed in a different manner according to the mode of use but is preferably provided with a hinge arrangement which prevents or counteracts unintentional bursting open of the door.

The door frame portion and the side edge portion of the door leaf are illustrated in the form of sheet material of steel or the like but for the sake of simplicity additional reinforcing elements, insulation means and the like are not shown.

The lock mechanism of the locking bar includes as a main component a doublebranched lever 16, 1 7 which is firmly connected to a vertical pivot shaft 1 8 which is pivotably mounted in bearings 1 9 (of which only one bearing is shown in the drawings) at a suitable distance from pivot shaft 14 of the locking bar 1 3. The one branch 1 6 of the lever forms a finger-shaped actuating member which passes endways through a slot 20 in the locking bar surface 1 3b and which is firmly connected to a guide member 21 internally in the hollow space of the locking bar.

The guide member 21 extends the whole vertical length of the locking bar and the hollow space 1 3e of the locking bar forms a guide as well as a support for the guide member 21. As shown in Figs. 1 to 4, the guide member is designed with a circular cross-section but can be formed alternatively with locally rounded-off peripheral portions on opposite length edge sides. The pivot shaft 1 4 and the pivot shaft 18 are effectively supported in their respective corners of a Cshaped support member 22 which is supported, in turn, by an additional support member 23.The other branch 1 7 of the lever projects outwards endways through a slot in the members 22, 23 and consists of a Ushaped fork member having two opposite grooves 1 7a (only the one groove being shown in the drawings) which each engage a respective pin 24 on a regulating element 25.

A manually adjustable regulating element 25 which is adjusted by an adjusting member 26 which projects outside the door frame portion 10 has a hand grip portion 27 in Fig.

1 and the hand grip portion as well as parts of the stem portion 28 of the adjusting member in Fig. 3. The adjusting member 26 is displaceably received in a supporting sleeve member 29 secured to the inner side of the frame portion 10 and by means of a slot 30 in the stem portion 28 of the adjusting member and a control pin 31 in the sleeve member 29 is arranged to perform a limited axial movement relative to the sleeve member at the same time as turning between the adjusting member and the sleeve member is prevented. In this way, there can be permitted an accurate movement of the adjusting member from the position of Fig. 1 to the position of Fig. 3.

In the position which is shown in Fig. 1, a block bar 32, which is displaceable across the adjusting member at its inner end in a groove 33, closes off the space at the rear of the regulating member 25 so that the latter is cut off between the fixed sleeve member 29 and the block bar 32. On turning a key 34 in the adjusting member 26 in cooperation with a cylinder lock 35 in the adjusting member 26, the block bar can be transposed from the position in Fig. 1 to the position in Fig. 2 so that the stem portion 28 of the adjusting member 26 can be axially displaced relative to the surrounding sleeve-shaped regulating member 25 to the position which is illustrated in Fig. 3. In Fig. 3, the block bar is shown after it has been pushed outwards again into a new engagement with the regulating member, the outer end of the block bar being received in a corresponding cavity 36 in the regulating member 25. After the adjusting member 26 is pushed inwards again from the position shown in Fig. 3 to the position shown in Fig.

4, the regulating member has swung the lever correspondingly and thereby swung the actu ating member 16 relatively to the locking bar 1 3 so that the latter is swung outside the path of swing of the door leaf. The door leaf can now be swung freely while the door leaf in the position shown in Fig. 3 is not locked but nevertheless is prevented from being opened as a consequence of the self-locking blocking between the actuating member and the locking bar.

On locking the door from the position shown in Fig. 4, one proceeds in the opposite manner to that which is described above and in the position shown in Fig. 1, the key 34 can be drawn out and unintentional opening of the door thereby prevented.

In a further embodiment (not shown), a motor-driven regulating member can be employed instead of the manually adjustable regulating member 25, the motor being able to be placed in suitable engagement with the regulating member and transpose the latter into desired positions as shown in Figs. 1-3 and Fig. 4, respectively. The motor can, for example, be remotely controlled and operated by means of a suitable code mechanism.

Claims

1. A lock mechanism for doors, especially for doors of safes, safe deposits and the like, which comprises a rounded-off lock member portion in a side edge portion of the door leaf adapted to be closed off by means of a locking bar pivotably mounted in the door frame for pivoting into a locking position by swinging inwardly into an pivoting into a released position by swinging outwardly from the path of swing of the door leaf by means of an adjustment mechanism in the door frame, said locking bar being pivotably mounted about a vertical, stationary pivotal axis at an outer portion of the door frame while an associated actuating member included in the adjustment mechanism is pivotably mounted about a vertical, stationary pivotal axis at an inner portion of the door frame, the pivotal axes of the locking bar and the actuating member each being arranged on its respective side of a main plane through the door frame, and said locking bar reckoned in the radial direction being of elongate form and relatively narrow and having a radially extending guide slot for the reception of a vertically directed guide member at the end of the actuating member projecting freely outwards and said locking bar in said locking position extending obliquely inwards towards the lock member portion of the door leaf and crossing the outer path of swing of the door leaf at at relatively small angle while the actuating member extends obliquely outwards towards the free end of the locking bar and transversely of the outer path of swing of the door leaf.

2. A mechanism according to claim 1, wherein the pivotal axes of the locking bar and the actuating member are arranged mutually on a line transversely of the main plane through the door frame.

3. A mechanism according to claim 2, wherein the locking bar and the guide member have a considerable vertical dimension, the guide member being supported in a first region by the actuating member and in remaining regions by support members extending parallel to the actuating member and rigidly connected to a pivot shaft of the actuating member.

4. A mechanism according to claim 3, wherein the vertical dimension extends the whole height of the door.

5. A mechanism according to claim 3 or 4, wherein the locking bar is designed with an elongate, 0-, D- or similarly closed pipe crosssection, the major axis of which extends radially outwards from the pivotal axis of the locking bar, said locking bar having a suitable intermediate space in a vertical direction and being provided with laterally directed slots for the reception of the actuating member and the support members in the link connection with the locking bar.

6. A mechanism according to claim 5, wherein the pipe cross-section of the locking bar has a minimum internal cross-sectional dimension substantially corresponding to the external cross-sectional dimension of the guide member, the guide member having locally rounded-off surface portions or a substantially circular cross-section.

7. A mechanism according to any of claims 1 to 6, wherein the actuating member constitutes the one branch of a doublebranched lever and the other branch is linkably connected to a regulating member which is horizontally displaceable in the door frame by means of a manually adjustable adjusting member.

8. A mechanism according to claim 7, wherein the adjusting member supports a control bar which is operable by means of a key in combination with a cylinder lock in the adjusting member, said adjusting member being displaceable relative to the regulating member when the control bar occupies a rearwardly drawn, inactive position and being displaceable together with the regulating member when the control bar is pushed into engagement with a cavity in the regulating member.

9. A mechanism according to claim 8, wherein the control bar forms a blocking member for the regulating mtmber of the adjustment mechanism in the locking position of the locking bar.

1 0. Lock mechanisms for doors, especially for doors of safe deposits and the like, as claimed in claim 1 and substantially as described herein with particular reference to the accompanying drawings.