Closure sequence controller for a double-wing door

Abstract: A closure sequence control arrangement for a door comprising first and second door leaves (1,2) hinged to opposite sides of a door frame (3), the door having a first closer unit (4) and a first pivot arm (5) for closing the first door leaf (1) and a second door closer unit (6) and a second pivot arm (7) for closing the second door leaf (2). The arrangement includes guide rail means (8) or the like supported on the door frame (3) for guiding ends (5a,7a) of the pivot arms (5,7) remote from the door closers, and closure sequence control means (9) cooperating with the guide rail means (8). The closure sequence control means (9) include a connection piece (10,11,12) arranged in the guide rail means (8) between the ends (5a,7a) of the pivot arms and movable against the force of a spring (15), a support element (13) stationarily supported to the guide rail means (8), and a movable blocking member (14). The closure sequence control means (9) are arranged in cooperation with the opposite ends (5a,7a) of the pivot arms at the end phase of the closing movement of the door leaves so that the blocking member (14) prevents movement of the end (7a) of the second pivot arm (7) in the guide rail means (8) until the end (5a) of the first pivot arm (5) affects the blocking member (14) through the connection piece (10,11,12) so that the blocking member (14) allows closing of the second door leaf (2). The blocking member (14) is received in a guide aperture (13b) in the support element (13) so that, in its blocking position, the blocking member (14) projects partly from the guide aperture (13b) into the path of movement of the end (7a) of the second pivot arm (7).

Description: This invention relates to a closure sequence control arrangement for a door comprising a pair of turnable door leaves, the arrangement being in accordance with the preamble of claim 1. In order to lock a pair of door leaves together in a closed position, it is preferable to provide one of the door leaves with a latch bolt. However for the latch bolt to operate, the door leaves must be closed in a required order so that the door leaf provided with the latch bolt is closed after the other door leaf. When this occurs, the spring-loaded latch bolt can be retracted, due to its bevelled guiding surface, against spring biasing, into a lock housing in the door leaf as the door leaf in question is turned into its fully closed position. When in this fully closed position, the latch bolt can again move, urged by the spring, into its protruding position, in which the door leaves are locked together. One closure sequence control arrangement suitable for the purpose is disclosed in EP-A-0458034. However this known arrangement is constructionally complicated and its installation is somewhat cumbersome. Another known arrangement comprising all the features of the preamble of claim 1 is disclosed in DE-A-3336739. An aim of the present invention is to provide a new arrangement for a pair of turnable door leaves which ensures that the door leaves are closed in a desired order but which is constructionally simple and operationally reliable and which, furthermore, is relatively easy to install and to apply to doors of different widths. The aims of the invention can be met with a closure sequence control arrangement as claimed in claim 1 and in the other claims. In accordance with the invention, there is provided a closure sequence control arrangement as claimed in the ensuing claim 1. By means of such an arrangement it can be ensured that, in a simple and reliable way, the first door leaf is closed before the second door leaf is closed. In a favourable embodiment of the invention the support element includes a guide surface which extends in the direction of the guide rail and into which the guide aperture opens. Advantageously the end of the connection piece at the side of the support element comprises a guide element provided with a holder member, the guide element being in cooperation with the guide rail and with the guide surface in the support element. When the door leaves are open, the holder member, under the influence of said spring, is arranged at the position of the guide aperture to prevent movement of the blocking member into a releasing position. The guide element is conveniently designed to comprise a guiding surface parallel with the guide surface of the support element and located at a distance from it and allowing movement of the blocking member into its releasing position but preventing, however, movement of the blocking member entirely away from the guide aperture. Advantageously the holder member comprises a separate spring-loaded holder piece which serves as an overload clutch and protects the mechanism from being damaged, for instance by misuse. The force affecting the door leaf and releasing the clutch is then dependent on the strength of the spring of the clutch. The connection piece can with advantage comprise an elongate arm member which is detachably mounted, for example by screw threads, at one end to the guide element and at the other end to a counter piece and which is arranged to cooperate with the end of the pivot arm of the door closer of the first door leaf. The arrangement is constructionally simple and can be used with substantially narrower pairs of door leaves, for instance by shortening or truncating the arm member where necessary. An embodiment of the invention will now be described, by way of example only, with particular reference to the accompanying drawings, in which: Figure 1 schematically shows a door closure arrangement according to the invention for a pair of turnable door leaves viewed from above and in an open position, the arrangement including closure sequence control means which are activated to determine the closing order of the door leaves; Figure 2 is a side view, partly in section, of the arrangement shown in Figure 1; Figure 3 is an enlarged view of part of Figure 2 showing the closure sequence control means; Figure 4 illustrates the arrangement of Figure 1 in a situation where the first door leaf is closed and the closure sequence control means are in a position allowing closure of the second door leaf; Figure 5 is a side view, partly in section, of the arrangement of Figure 4; and Figure 6 is an enlarged view of part of Figure 5 showing the closure sequence control means. In the drawings reference numerals 1 and 2 indicate the two door leaves of a door, the door leaves being turnably journalled, e.g. hinged, to opposite sides of a door frame 3. The door leaf 1 is provided with a door closer 4 having a swing or pivot arm 5 and the door leaf 2 is correspondingly provided with a door closer 6 having a swing or pivot arm 7. Supported on the door frame 3 (not shown more closely) above the door leaves 1 and 2, there is a guide rail 8 which guides the ends 5a and 7a of the pivot arms 5 and 7 during opening and closing movements of the door leaves. In addition, the guide rail 8 is provided with sequence control means 9 which ensure that the door leaf 2, which is provided with a latch bolt 18, is only able to close after the door leaf 1 has been closed. If the door leaf 2 were allowed to close before the closure of the door leaf 1, the latter could not turn past the door leaf 2 into is fully closed position and the latch bolt 18 could not cooperate with a lock housing (not shown) in the door leaf 1 to lock the door leaves together. The closure sequence control means 9 include a connection piece comprising an arm member 10, one end of which includes a counter piece 11 and the other end of which includes a guide element 12. The counter piece 11 cooperates with the end 5a of the pivot arm 5 and the guide element 12 cooperates with a support element 13 fixed to the guide rail 8. The support element 13 includes a guide surface 13a and a guide aperture 13b in which a blocking member 14 is received. The guide aperture 13b is so designed that the blocking member 14 is partly allowed to protrude from the aperture (see Figure 3) so as to prevent movement of the end 7a of the pivot arm 7 along the guide rail 8 and thus also turning of the door leaf 2 itself further into its fully closed position. The guide element 12 includes an extension member 12a which, together with the guide surface 13a in the support element 13 and the inner surface of the guide rail 8, guides the movements of the element 12 and the arm member 10. The guide element 12 also includes a bore 12b in which is received a holder member or piece 16 which is urged resiliently downwards (as viewed in Figure 3) by a spring 17. In the position shown in Figure 3, the holder piece 16 is resiliently urged against the blocking member 14 and prevents movement of the blocking member 14 away from its position shown in Figure 3 into the position shown in Figure 6. In the Figure 6 position, the end 7a of the pivot arm 7 of the door closer in the second door leaf 2 is released for movement along the guide rail 8. When the door leaves are open, a spring 15 between the guide element 12 and the support element 13 keeps the guide element 12 and the holder piece 16 at their positions shown in Figure 3 (i.e. with the blocking member 14 in its blocking position). In addition the guide element 12 comprises a guiding surface 12c, parallel with and spaced apart from the guide surface 13a of the support element 13. After movement of the guide element 12, and thus of the holder piece 16, into the positions shown in Figure 6 (i.e. so that the holder piece 16 is away from the position of the blocking member 14), the blocking member 14 can be moved into a releasing position in the guide aperture 13b so that the end 7a is released for movement along the guide rail 8. In its releasing position shown in Figure 6, the blocking member 14 is still positioned within the guide aperture 13b. The closure sequence control means operates as follows. In the case where both the door leaves 1 and 2 are open and an attempt is made to close the door leaf 2 with the latch bolt 18 before the door leaf 1 is closed, the door leaf 2 turns until the end 7a of its pivot arm 7 hits the blocking member 14 which protrudes partly from the guide aperture 13b. In this case the holder piece 16 is at the position of the blocking member 14 (as shown in Figure 3) preventing movement of the blocking member 14 into its releasing position, so the door leaf 2 remains in a partly open position corresponding in general to an opening angle of about 20°, although the opening angle may be different, e.g. from about 20° to 30°. In order to fully close the door leaf 2, it is necessary to turn the door leaf 1 so that the end 5a of the pivot arm 5 hits the counter piece 11 located at the end of the arm member 10. On continued turning of the door leaf 1, the end 5a urges the connection piece against the force of the spring 15, arranged between the guide element 12 and the support element 13, into a position shown in Figure 6, in which the holder piece 16 is moved away from the position of the blocking member 14. In this position the blocking member 14 is allowed to move partly out from the guide aperture 13b against the guiding surface 12c thereby releasing the end 7a of the pivot arm 7. The door closer 6 can now turn the door leaf 2 into its fully closed position, in which the latch bolt 18 locks the door leaves 1 and 2 to each other. The extension member 12a of the guide element 12 corresponds to the holder piece 16 with regard to the basic operation of the closure sequence control means 9. It is possible for the extension member 12a to entirely substitute the holder piece 16. In practice, however, it is preferred to have a separate holder piece 16 together with the spring 17 which serve also as an overload clutch to prevent damage to the construction in case of misuse. Thus if a strong turning force is exerted on the door leaf 2, the end 7a of the pivot arm 7 presses the holder piece 16 through the blocking member 14 against the spring 17 so that the end 7a of the pivot arm 7 can then move along the guide rail 8 past the blocking member 14. In practice this may occur when the door leaf 2 is forced to close first. In this case the door leaf 1 cannot be turned into its fully closed position past the latch bolt 18 in the door leaf 2. Instead the door leaves must first be reopened before being closed in the correct sequence. An overload clutch may also be required when the door leaves are opened. If, for instance, both the door leaves 1 and 2 are first partially opened and thereafter the first door leaf 1 is fully opened, the sequence control means 9 will be in the position shown in Figure 3. In this case, the door leaf 2 may have remained in a position in which the end 7a of the pivot arm 7 is positioned on the wrong side of the blocking member 14, that is to say on the left side of the blocking member 14 as viewed in Figure 3. Thus, the door leaf 2 cannot now be turned open except either by utilising a turning force that overcomes the force of the spring 17 in the overload clutch or by entirely closing the door leaf 1 and then by opening the door leaf 2. As is apparent from the drawings, the blocking member 14 is a ball, especially a steel ball, whereby it constitutes a simple standard product. Correspondingly the end 7a of the pivot arm 7 and the support element 13, at least for the part comprising the guide aperture 13b, should be made of a hard and wear resistant material, for instance of hardened steel. In the arrangement illustrated in the drawings the guide rail 8 comprises a one-part uniform rail 8. In principle, however, the guide rail could alternatively, for instance, comprise two parts so that the ends 11 and 12 of the arm member 10 are located in separate guide rails. If the arm member 10 is detachably mounted, for instance by means of screw threads at its ends, to the counter piece 11 and/or to the guide element 12, the operative length of the arm member 10 can be adjusted in accordance with the width of the door opening (i.e. approximately the combined widths of the two door leaves). Furthermore, if necessary, the arm member 10 may be shortened, for example by truncation, to adapt the arrangement according to the invention to a pair of door leaves of smaller width. Also the support element 13 may, when desired, be detachably mounted, for instance by screws, to the guide rail 8, whereby by changing the location of the screws it is possible simultaneously to change the very opening angle of the door leaves when the sequence control means are activated. The closure sequence control arrangement may be fitted as an accessory to an existing door having a pair of door leaves hinged to opposite sides of a door frame or may form part of an initially fitted door. The invention is not limited to the embodiment shown, but several modifications are feasible within the scope of the attached claims.

Claims: A closure sequence control arrangement for a door comprising first and second door leaves (1,2) hinged to opposite sides of a door frame (3), the door having a first door closer unit (4) and a first pivot arm (5) for closing the first door leaf (1) and a second door closer unit (6) and a second pivot arm (7) for closing the second door leaf (2), the arrangement including guide rail means (8) arranged to be supported on the door frame (3) for guiding ends (5a,7a) of the pivot arms (5,7) remote from the door closers, and closer sequence control means (9) cooperating with the guide rail means (8) and including a connection piece (10,11,12) arranged in the guide rail means (8) at least between the ends (5a,7a) of the pivot arms, a support element (13) stationarily supported to the guide rail means (8), and a movable blocking member (14) arranged in a guide aperture (13b) in the support element (13) and movable between blocking and releasing positions respectively limiting and allowing movement of said end of the second pivot arm (7) in the guide rail means, the blocking member (14), when in its blocking position, projecting partly out from the guide aperture (13b) into the path of movement of the end (7a) of the second pivot arm (7), whereby the closure sequence control means (9) are arranged in cooperation with said opposite ends (5a,7a) of the pivot arms at the end phase of the closing movement of the door leaves so that the blocking member (14) is arranged in its blocking position to prevent movement in the guide rail means (8) of the end (7a) of the second pivot arm (7) until the end (5a) of the first pivot arm (5) affects the blocking member (14) through the connection piece (10,11,12) so that the blocking member (14) moves into its releasing position and allows closing of the second door leaf (2), characterised in that the arrangement further includes a spring (15) providing a spring force acting on said connection piece (10,11,12), in that the blocking member (14) is a ball, and in that the connection piece (10,11,12) is movable into and out of a blocking position for retaining the blocking member (14) in its blocking position, the connection piece (10,11,12) being urged by said spring force towards its blocking position and being moved out of its blocking position, against said spring force, by the end (5a) of said first pivot arm (5) during closure of the first door leaf (1) into a releasing position whereby the blocking member (14) is allowed to return to its releasing position. A closure sequence control arrangement according to claim 1, characterised in that the support element (13) includes a guide surface (13a) extending in the direction of the guide rail means (8) and into which the guide aperture (13b) opens, and in that the end of the connection piece (10,11,12) at the side of the support element (13) comprises a guide element (12) provided with a holder member (12a,16), the guide element (12) being in cooperation with the guide rail (8) and with the guide surface (13a) in the support element so that when the door leaves are open the holder member (12a,16) is arranged, under the influence of said spring (15), at the position of the guide aperture (13b) to prevent movement of the blocking member (14) into its releasing position. A closure sequence control arrangement according to claim 2, characterised in that the guide element (12) comprises a guiding surface (12c) parallel with the guide surface (13a) in the support element (13) and located at a distance from it and allowing movement of the blocking member (14) into its releasing position but preventing movement of the blocking member (14) entirely away from the guide aperture (13b). A closure sequence control arrangement according to claim 2 or 3, characterised in that the holder member (12a,16) comprises a separate spring-loaded (17) holder piece (16). A closure sequence control arrangement according to any one of claims 2 to 4, characterised in that the connection piece (10,11,12) comprises an elongate arm member (10) which is detachably mounted at one end to the guide element (12) and at the other end to a counter piece (11) which is arranged to cooperate with the end (5a) of the pivot arm of the door closer of the first door leaf (1).

Inventors: PAASONEN SIMO, PAASONEN, SIMO
Applicants: ABLOY OY
Application year: 1998
Main classification: E05F5
IPC codes: E05F5