GB2250775A - Bolt mechanism - Google Patents

Abstract

A cremone system mounted as a built-in system adjacent the front edge of a door wing. particularly in the standing wing of a two-winged fire door, is designed so as to provide for more space for the building in of additional fittings or lock parts in the front edge portion of the wing. To this end the cremone system comprises, conventionally, an actuator unit (1) with associated cremone bolt rods (9), but one or both of these rods are cranked rearwardly from the actuator so as to generally extend along the front edge of the door wing with an increased spacing therefrom, thereby enabling the mounting of the said additional fittings or lock parts. <IMAGE>

Description

.z 22 --)0775 A DOOR WING A11D A CREMONE 3')LT MECHANISM FOR USE THEREIN 1

The present invention relates to a door wing and a cremone bolt mechanism for use therein, e.g. as used in two-winged doors, particularly in fire doors.

In two-winged doors one wing usually serves as a movable wing, while the other is a standing wing. The movable wing has a latch bolt with a door handle, by means of which it can be opened for normal traffic. When the movable wing is closed it is locked to the standing wing by means of the latch bolt, the latch of which engages with a stiking plate on the standing wing.

In connection with admission control systems and remote door watching use is often made of electrically operated striking plates on the standing wing.

Normally the standing wing is locked to the top piece of the door frame and even to the f loor or a bottom frame piece by means of a cremone bolt system. being a lock type having one or mostly two vertical bolt rods, of which one extends from a lock actuator on the standing wing upwardly to the upper edge, of this wing, while the other. if pregent., extends correspondingly to the lower edge of the wing.

The cremone bolt can be provided at the outside of the door wing or be embedded therein, with the bolt rods extending parallel with the front edge of the standing wing, located in suitable channels therein, slightly spaced from the said front edge. By means of the lock actuator the rods may he projected from the standing wing so as to engage with striking plates on the top and bottom pieces of the door frame, for locking this, wing, while also being retractable into the wing for unlocking the wing such that-it can be opened for passage all over the width of the door.

Mostly the built-in cremone bolts are preferred, because they are then generally inaccessible for non-authorized persons, just as they will not mar the look of the door and, also, be protected against heat 2 impacts on the door, this being important for fire doors.

However. a built-in cremone bolt, the rods of which extend all along the front edge of the standing wing, may be an obstruction for the mounting of other fittings or locking mechanisms. For example, they will obstruct the mounting of an electrically retractable striking plate mechanism, which has a noticeable build-in depth. Also the Use on the movable wing of a security lock having an extra long latch may be made impossible, because the cremone rods do not leave sufficient space for the long latch in the standing wing.

it is the purpose of the invention to provide a cremone bolt system of the built-in type which will facilitate an additional building-in of other fittings or lock mechanisms in the standing wing of a two-winged door or for that nake in any other door as well.

The invention is based on the consideration that while the lock actuator is suitably mounted closely behind the front edge of the door wing, this will not have to imply that also the vertical cremones rods have to extend correspondingly close to this front edge, as they may be cranked rearwardly from the lock actuator so as to extend in grooves or channels in positions well spaced from the front edge of the door wing, whereby there will be provided an enlarged spacing between the front edge and the eremone rods. Thus, there is made room for other fittings-to be built into the front edge portion of the-door wing, notably fittings having e relatively big build-in depth.

It may be desirable that the cremone rods engage with their striking plates immediately adjacent the front edge of the wing, but this will still be possible, viz. if the outer end portions of the rods are cranked forwardly from the sunk rod portions.

For the purpose of the invention it has been found 3 particularly advantageous to make use of a system developed beyond a mere cranking of the cremone rods, as explained below.

In the following the invention is described in more detail with reference to the drawing, in which:

Fig. 1 is a perspective view of a known cremone actuator, Fig. 2 is an exploded view of a known cremone system in which this actuator is employed, Fig. 3A is a lateral view of the upper half of the same actuator, now provided with a cremone rod in accordance with a first embodiment of the invention..

Fig. 3B is a top view thereof, Fig. 4A is a lateral view similar to Fig. 3A, but of a modified embodiment, and Fig. 4B is a to view thereof.

In Fig. 1 is shown a cremone actuator 1 having two Glides 2 of a rectangular cross section, each slide being guided in an individual, rectangular housing portion 3. Between these housing portions in arranged a pivot latch---4, which is pivotal about an axin parallel with the longitudinal axes of the slides 2. Each Glide 2 has a pin portion 5 at the end facing the pivot latch 4. each pin portion 5 projecting through a bottom plate 6 of the associated housing 3, inwardly against a screw surface portion 7 of the pivot latch 4. When the pivot latch 4 is rotated inwardly between the housing portions 3 as shown by an arrow 17 the screw surfaces 7 will urge the pin portions 5 and therewith the slides 2 away from each other, The cremone actuator according to Fig. 1 is adapted to bemounted in a door wing in a -manner such that a front plate portion 8 is countersunk flush with the front edge of the wing, with the latch 4 protruding from the front edge. In this position the rotaryAnotion of the latch can be effected by the front edge portion of 4 another door wing mounted opposite to the wing holding the cremone system 1, when this other wing is closed. This will cause the cremone wing to he lockede as now explained with reference to Fig. 2.

Fig. 2 shows the same cremone actuator, completed with cremone rods 9 that are long enough to reach up to the top edge of the door wing and down to the bottom edge thereof, respectively. All of the parts shown in Fig. 2 should be considered as mounted in a door wing, whichr itself, is not illustrated. By the mounting of the cremone system the rods 9 are screwed into receiver holes 10 in the ends of the respective slides 2. On the free ends of the cremone rods are mounted end pieces 11, which carry return springs 12 that will be biased 'between these respective end pieces and associated corner fittings 13 mounted at the respective upper and lower front corners of the door wing.

A wear plate 14. Fig. 2, is mounted on a door-wing placed opposite to the wing carrying the crenone system 1,9. Striking plates 15 are mounted in the respective top and bottom pieces of the frame. in which the door wing having the cremone system is mounted.

By a movement of the wear plate 14 against the pivot latch 4 in the direction of the arrow 29 the outwardly directed displacement of the slides 2 and therewith of the rods 9 will be effected as described in connection with Fig. 1. whereby the outer ends of the rods 9 will enter into engagement with the holes in the frame striking plates 15. Hereby the standing door wing will be locked by the closing of the movable door wing as carrying the wear plate 14.

As apparent from Figs. 1 and 2 the cremone rods 9 are situated very close to the front plate portion 8 and therewith also close to the front edge of the door wing, in which the cremone system is mounted.

This may obstruct the building in of other locking mechanisms, e.g. en electrical striking plate, in the standing door wing. Also, the cremone rods 9 may obstruct the use of a security lock with an extra long latch on the movable door wing. Generally, the cremone rods 9 will limit the depth of intrusion of other f.ittings to be mounted on the standing door wing.Figs. 3A and 3B illustrate a first embodiment of a cremone system according to the invention, where this drawback has been remedied.

In this cremone structure 1, by means of a screw into the receiver hole 10, an arm 17 is secured to the end of the slide 2, which in Fig. 2 would receive the cremone rod 9. The arm 17 is bent in Z-shape. It h4s a middle portion extending parallel with the housing 3 of the slide 2, while a short end portion 19 is bent over the end of the slide and is secured thereto by a screw received in the hole 10, a longer opposite end portion being bent out rearwardly from the actuator. This end portion 20 has an outer, new receiver means f or the cremone rod 9, viz. a drawn up, threaded hole 21.

Where the long end portion 20 meets-'-with the middle portion 18 of the arm 17 there is mounted a disk 22 of a low friction material, e.g. PTFE, between the middle portion 18 and the housing 3, in order to take up momentum forces from the cremone rod 9. For further reinforcing the. arm 17 there is provided a pressed up or welded corner piece 27 at the corner between the portions 18 and 20.

The middle portion IS of the arm 17 is secured to the slide 2 by means of a screw 23 surrounded by a distance bushing 24. Both-the screw 23 and the bushing 24 extend through an elongated hole 25 in the housing 3. These elongated holes 25, which have not been mentioned so far, will be seen also in Fig. 2, where they serve to receive respective stop pins 26, which limit the displacement of the slides 2 in the housings 3 and prevent 6 the slides from falling out of the housings 3.

A slightly modified embodiment is illustrated in Figs. 4A and 4B. Here the arm 17 projects radially from the slide 2 and is supported by a strut 28. The arm 17 is welded to the strut 28 in the area around the receiver hole 21 for the cremone rod 9. Also here this hole is a drawn up, threaded hole. At its opposite end the strut 28 is bent down to extend parallel with the housing 3 and is secured to the slide by means of a screw 23, again surrounded by a bushing 24. Also here, the screw and the bushing extend through an elongated hole 25 in the housing 3.

As apparent from the drawing, based on the dieclosed simple design the cremone rod 9 can be mounted more or less spaced behind the front pl ate 8 of the actuator and thus behind the front edge of the door wing holding the cremone system. This spacing is determined only by the position of the new receiver holes 21 on the arm 17. These arms may well be produced with different lengths adapted to different, frequently occurring mounting conditions, or the arm 17 may be provided with a slot for enabling a stepless mounting of the the cremone rod 9.

Finally it is to be mentioned that the corner f ittings 13 as shown in Fig. 2 should of course be adapted to the changed location of the cremone rods 9 relative to the front edge of the door wing. A guiding plate just resting agains- the upper/lower edge of the door wing and not eRgaging with the cprner could be an a ttr4ctive alternative to the corner fittings 13, particularly in connection with wooden fire doors, where the least possiUe weakening of the upper front edge corner of the door is desirable.

It should be mentioned that the door system here described, based already on Figs. I and 2, is a so-called panic double door system, in which an opening 7 of the movable door wing should cause also the opposedt standing door wing to be readily openable, but it will be appreciated that the invention is in no way limited to being used in just such a door system, as it will be applicable even for one-wing doors, no matter the detailed design of the actuator for the displacement of the cremone rod or rods.

Also, the invention will comprise both the disclosed cremone system as such as well as any door wing mounted with such a system in the discussed manner.

8 C L A 1 M S; 1. A door wing, preferably a fire door wing, provided with a cremone bolt system adjacent its free front edge, said system comprising an actuator in operative connection with cremone rod means projecting upwardly and/or downwardly in channel means located inside the front edge of the wing, for cooperation with striking plate means at the top and/or the bottom of an associated door frame, characterized in that the cremone rod means are cranked so as to project rearwardly from a position near the actuator and then up- and/or downwardly with a correspondingly increased spacing from the said front edge, such that additional fittings or lock parts can be mounted between the said front edge and the offset cremone rod portions.

2. A cremone system for use in a door wing according to claim 1. comprising an actuator and at least one crenone rod projecting from the actuator, characterized in that the cremone rod is cranked rearwardly from the actuator, such that in its installed condition the cremone rod will extend, at least over a partial length thereof, with an increased spacing from the front end of the door wing.

3. A cremone system according to claim 2, characterized in that the actuator is of the type having means for displacing a slide, e.g. in response to a movable door wing being closed and opened, when the system is mounted in the standing wing of a two-winged door, which slide has a non-circular cross section and is mounted slidably in a housing having a corresponding cross section, the displacement of the slide being limited by a stop pin projecting laterally from the slide out through an elongated hole in the housing, and the exterior end of the slide being connected with the associated cremone rod, and that this connection includes an arm, which is 9 rigidly secured to the end of the slide and projects laterally from the slide in the direction away from the front side of the housing. this arm further being fixed to the slide by way of a inechanical connection through the said elongated hole, the arm being provided with Taeans for holding the inner end of a cremone bolt.

4. A cremone system according to claim 3, in which the said arm is Z-bent, with its middle portion extending along the side of the housing and connected with the slide across the elongated hole in the wall of the housing.

5. A cremone system according to claim 4, in which there is arranged a low friction sliding plate between the housing wall and the end area of the Z-arm middle portion carrying the outer end portion of the Z-arm.

6. A cremone system according to claim 3, in which the arm projects froin the end slide perpendicularly to the length axis of the slide and is supported by a strut extending between the free end of the arm, where the cremone rod is received. and a connector portion secured to the slide and projecing through said elongated hole.

7. A cremone system according to claim 3, in which the said arm is provided with rod holding means at zore than one place.