GB2111582A

GB2111582A - Fastening adapted for manual operation

Info

Publication number: GB2111582A
Application number: GB08230454A
Authority: GB
Inventors: James Eli Jones; Allan Thomas Riley
Original assignee: SPEEDCRAFT Ltd
Current assignee: SPEEDCRAFT Ltd
Priority date: 1981-11-28
Filing date: 1982-10-25
Publication date: 1983-07-06

Abstract

An insert (14) is provided which can be substituted for a profile cylinder lock (26) in a locking device (10) of the type in which a rotating operating member actuates a bolt (13). The insert (14) has a waisted projection (16) and a central non- circular bore (22) for attachment of a lever or thumb turn. Various ways of securing the insert (14) in the casing (11) of the locking device are suggested. In one embodiment the insert is trapped by flanges within the locking device casing during manufacture. In another the insert can be assembled with the casing after manufacture and is held in place by circlips in grooves of the insert body. <IMAGE>

Description

SPECIFICATION Locking device This invention relates to locking devices of the type operated by a rotating operating member having a generally radially extending projection which co-operates with the mechanism of the device to engage or disengage a bolt and hence to lock or unlock a door or similar member. Such a locking device will be referred to as being a locking device "of the type specified".

Typical examples of a locking device of the type specified are used in securing hollow frame sliding patio doors for example, and the following description will refer especially to locking devices used for this purpose. However, similar locking devices may find many other applications.

Conventionally, there are two different kinds of locking device of the type specified.

The first and simpler type is manually operated and has a manual operating mechanism which includes the radially extending projection.

Because of the absence of any form of key operation, such locking devices are reiatively smail.

In a second kind of locking device of the type specified, a cylinder lock is used, and is key operated from one or both sides of the door. In a patio door locking device, the cylinder lock is usually a profile cylinder lock having a crosssection of generally key-hole shape including an elongate projecting ridge which houses pin tumblers of the barrel of the cylinder lock. The barrel is housed within the circular part of the keyhole shape. The use of the correct key allows the barrel of the cylinder lock to be rotated and this rotates a cam body, also of generally key-hole shape, which is disposed centrally of the length of the lock. The cam body, which includes said radially extending projection, rotates out of alignment with the rest of the profile cylinder lock to operate the bolt.

From the manufacturing point of view, the production of two different kinds of locking device of the type specified means higher cost than if a single kind could be used for operation in either mode, that is either by means of a key-operated cylinder lock or by manual operating means. Sales outlets also have to keep stocks or both kinds of locking devices at present.

It is an object of the present invention to provide the facility for either cylinder lock or wholly manual operation in a locking device of the type specified, by the provision of a manual operating mechanism compatible with a locking device of the type specified which is also capable of cylinder lock operation.

According to the invention, there is provided, in or for fitment to a locking device of the type specified having an opening adapted for fitment of a cylinder lock, a manual operating mechanism comprising an insert adapted to be inserted in said opening and to be rotatably secured therein, the insert including a body and a generally radially extending projection adapted to operate the mechanism of the locking device and the insert including, or having attachment means for nonrotatably attaching, a manual operating member capable of rotating the insert to operate the locking device.

The insert may have a generally cylindrical body on which the generally radially extending projection is provided.

The insert may be adapted to be trapped within said opening of the locking device by locating means at or adjacent each end. For example, the body may be provided with a pair of radially extending annular flanges adjacent its opposed ends and arranged to abut opposed inner faces of a casing of the locking device when the insert is in position. The insert may then serve to locate and support the opposed faces of the casing.

Alternatively, the insert may be arranged so that it can be inserted through the opening after assembly of the locking device. In this case, it may have locating means such as a radially extending flange at or adjacent one end only, to abut one inner face of a casing of the locking device whilst the other end of the insert may be secured against the outer face of the casing at the opposed side of the locking device by external retaining means. The external retaining means may comprise a circlip received in an annular groove in the body of the insert, for example.

As a further alternative, external retaining means such as a circlip engageable in a groove may be provided at or adjacent both ends of the insert.

The locating means or retaining means may be somewhat spaced from the associated end of the body so that a projecting part of the body can be used to afford a bearing surface to assist in locating the locking device within a hollow section frame member of a door for example.

Preferably, the insert is made in one piece by a method such as investment casting, sintering or machining from a metal such as brass, or as plastics moulding.

It may include a central non-circular bore to form attachment means for non-rotatably attaching a manual operating member such as a lever, thumb turn or the like.

The invention also provides a locking device of the type specified having a manual operating mechanism comprising an insert as set out above.

An insert and a locking device of the type specified embodying the invention will now be described by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a side elevational view of a first embodiment of insert; Figure 2 is a side elevational view of a second embodiment of insert; Figure 3 is an end elevational view taken on the arrow 3 of Figure 1; Figure 4 is a front elevational view of a locking device capable of receiving an insert such as those shown in Figures 1 and 2; Figure 5 is an internal view of the locking device showing a profile cylinder lock in position and the lock bolt withdrawn; Figure 6 is a view similar to that of Figure 5, showing the insert of Figure 3 in position and the lock bolt in a projecting condition.

Referring firstly to Figures 4 to 6 of the drawings, a locking device is generally indicated at 10 and comprises a generally rectangular casing 11 having a key-hole shaped opening 12 which is capable of receiving a profile cylinder lock (shown at 26 in Figure 5) to operate mechanism within the casing 11 of the lock 10.

Operation of the mechanism is illustrated in Figures 5 and 6. Rotation of the cylinder lock 26 causes a hook bolt 13 to be extended from the position shown in Figure 5 to that shown in Figure 4 or 6, or withdrawn in the reverse direction so as to secure or release a door or the like in which the locking device is fitted. In the example shown, the operating mechanism includes a lever 27 pivoted at 28 and constrained between two limit positions. An angled slot 29 acts cam-wise on a pin 30 of the hook bolt 13, which is pivoted at 31 in the casing 11 of the locking device 10.

Referring now to Figure 1 of the drawings, an insert is generally indicated at 1 4 and comprises a cylindrical body 1 5 having a generally radially extending projection 1 6 projecting from its central region. The projection 1 6 has a waisted shape which can be seen more clearly from Figure 3 of the drawings, in order to allow the projection 1 6 to swing cleanly into engagement with a forked portion 33 of the lever 27 of the operating mechanism, as seen in Figure 6.

Adjacent each end of the body 1 5, there is provided an annular flange 17. The insert 14 is assembled between a pair of walls of the casing 11 which are shown in dotted outline at 18 and 19 in Figure 1. The walls 18 and 19 serve to trap the insert 14 by abutting the annular flanges 17.

The remaining extreme end portions 20 of the body project through the walls 18 and 19 in the circular part 21 of the key-hole opening 12 in the casing 11. Thus, the insert 14 is located against translational movement in any direction but is rotatably mounted in the casing 11 of the locking device.

As will be seen from Figure 3, a central non circular bore 22 extends through the insert, for attachment of a manual operating member such as a lever or thumb turn for example.

Using the insert 14 shown in Figure 1, it is necessary to assemble the insert with the locking device before securing the casing 11 together.

This means that, for example, a retailer cannot readily put such an insert into a locking device if a potential customer wants manual, rather than key operation.

The insert 23 shown in Figure 2 of the drawings is so constructed that it can be inserted after the securing together of the locking device casing 11. It is therefore feasible for a retailer to stock the locking device together with separate supplies of profile cylinder locks 26 and inserts 23 of the type shown in Figure 2, to be assembled at the time of sale.

In order to achieve this, it is necessary for the insert 23 to be inserted through the key-hole shaped opening 21 of the locking device 10. This means that at least one end of the insert 23 has to be devoid of any projections such as flanges so that it can be passed through the key-hole shaped opening. The insert cannot be made undersized for the opening because the latter would not then afford a proper rotational bearing for the insert.

Each end is therefore provided with an annular groove 24 which is adapted to receive a circlip 25 to hold the insert 23 in position against the respective outer faces of the walls 1 8 and 1 9 of the casing 11.

As an alternative, (not shown) the groove 24 may be provided only at one end which is intended to be pushed through the casing of the locking device; an annular flange or other outwardly projecting formation provided at the other end will abut against the outer face of the casing wall.

The provision of an insert of the kind described allows a lock manufacturer to adopt a single standard operating mechanism for locking devices, irrespective of whether these are to be manually or key-operated.

Claims

1. In or for fitment to a locking device of the type specified having an opening adapted for fitment of a cylinder lock, a manual operating mechanism comprising an insert adapted to be inserted in said opening and to be rotatably secured therein, the insert including a body and a generally radially extending projection adapted to operate the mechanism of the locking device and the insert also including, or having attachment means for non-rotatably attaching, a manual operating member capable of rotating the insert to operate the locking device.

2. A manual operating mechanism comprising an insert according to claim 1 wherein the body is generally cylindrical.

3. A manual operating mechanism comprising an insert according to claim 1 or claim 2, the insert being adapted to be trapped within said opening of the locking device by locating means at or adjacent each end of the body.

4. A manual operating mechanism comprising an insert according to claim 3 wherein said locating means comprise a pair of radially extending annular flanges adjacent respective opposed ends of the body and arranged to abut inner faces of a casing of the locking device when the insert is in position.

5. A manual operating mechanism comprising an insert according to claim 1 or claim 2 which is capable of being inserted through said opening after assembly of the locking device.

6. A manual operating mechanism comprising an insert according to claim 5 having locating means such as a radially extending flange at or adjacent one end only of the body, to abut one inner face of a casing of the locking device, the other end of the body being secured by external retaining means against the outer face of the casing at the opposed side of the locking device.

7. A manual operating mechanism comprising an insert according to claim 5, wherein external retaining means are provided at or adjacent both ends of the body of the insert.

8. A manual operating mechanism comprising an insert according to any one of claims 5 to 7 wherein the retaining means comprise a circlip received in an annular groove in the body.

9. A manual operating mechanism comprising an insert according to any one of claims 3 to 8, wherein the locating means or retaining means are spaced from the associated end of the body so that a projecting part of the body affords a bearing surface to assist in locating the locking device in use.

10. A manual operating mechanism comprising an insert according to any preceding claim including a central non-circular bore to form attachment means for non-rotatably attaching a manual operating member such as a lever or thumb turn.

11. A manual operating mechanism comprising an insert substantially as hereinbefore described with reference to and as illustrated in Figures 1 and 3 of the accompanying drawings.

12. A manual operating mechanism comprising an insert substantially as hereinbefore described with reference to and as illustrated in Figure 2 of the accompanying drawings.

1 3. A locking device of the type specified having a manual operating mechanism comprising an insert according to any one of claims 1 to 12.

1 4. A locking device of the type specified having a manual operating mechanism comprising an insert and substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.