A SWINGING ARM HOLD HAVING A LOCK FOR WINDOWS, SHUTTERS AND THE LIKE

Abstract: A swinging arm hold (8), designed to be attached between a window case (1) and a window frame (6) and comprising a basic bar (12), attached to the case, and an upper arm (11) and a lower arm (13), projecting from the ends of the basic bar, which two arms are rotatably attached to the uppermost part of an outer bar (9), which carries the frame. About the hinge between the basic bar and the upper arm a lock (18) having a lock recess (21) is mounted, rotatable in a limited way and designed to interact with a holding element (22), which projects from the lower arm. The lock recess is limited in its outermost part by guide surfaces (29, 30) for the holding element and its innermost part has an extension, which runs with an acute angle in relation to a line between any part of the recess and the swinging center (19) of the lock, mainly designed to, during the last part of the swinging movement of the frame, give the lock an idle position, which takes up less space, and allow the frame to occupy a somewhat further outwardly swung partially open position. From the disc-shaped lock an angled actuation means (35) projects outwards towards the center of the frame and constitutes one of the limits of a security recess (31), designed to limit the swinging movements of the lock.

Description: A swinging arm hold having a lock for windows, shutters and the like The present invention relates to a swinging arm hold of the type set forth in greater detail in the preamble of patent claim 1. Swinging arm holds provided with locks are already known, e.g. through SE B 380 863 and 441 201 as well as SE A 86050 02-8. A window frame can be swung open by means of such holds from a closed to a partially open position, in which a lock starts functioning and prevents the swinging movement from continuing to a larger opening angle. The purpose of the lock is principally to prevent children from falling out of a win¬ dow. However, when cleaning windows, painting etc. it would be desirable to be able to open the window additionally or even swing the frame half a revolution, which is done by ma¬ nually actuating the lock in such a way, that its locking ele ment leaves its engagement position in relation to the hold, subsequent to which the frame can be swung, possibly in or¬ der to be locked anew in relation to the window case and the hold after having been swung half a revolution. However, said already known holds are impaired by several shortcomings and inconvenicences. Thus, the lock maybe is within too easy reach for children, who then are able to re¬ move in a simple way the locking element from its locking po sition. The construction of the lock often does not allowany other more concealed position, and consequently such a lock and such a hold are entirely objectionable. Another risk may be exists in the slow operation of the locking element or it tendency of being stuck in a clamp or friction position with out starting its operation automaticly. Also, the already known holds and locks are often comparatively complicated with a risk of functional disturbances because of this and with resulting production, assembly and mounting costs re¬ spectively, and it is probably necessary to produce the win- dow frame and/or window case in a special way and subject them to supplementary treatments. A substantial risk of func¬ tional disturbances and also permanent damages may exist in the construction and the interaction of the swinging arm hold and the lock, the latter possibly being subjected to inappro¬ priately large forces, e.g. lever arm forces, which may warp or premanently strongly wear down the locking element and particularly its vital parts. The locking element maybe is constructed in a wrong way ergonomicly seen, e.g. handicaped persons finding it difficult to actuate the lock and besides the lock, due to the way in which it is constructed, may re¬ quire substantial opening forces. Finally, the already known locks are often completely inoperative, in case the window is brought into a position, which is not an absolutely ver¬ tical position. Also, it is not possible to turn the hold upside-down in such a way, that e.g. the upper part of a window frame will be swung out from the window case. The object of the present invention principally is to, in all the above-mentioned respects, improve and develop the already known holds and locks, the described inconveniences and risks in this way being counteracted and being elimina¬ ted as far as possible. Another object of the invention is to in other respects develop the art in this field further and suggest a generally advantageous hold with a lock. These objects are attained mainly by constructing, according to the present invention, a hold with a lock of the type de¬ scribed above in such a way as is set forth in the charac¬ terizing clause of patent claim 1. Additional characterizing features and advantages of the in¬ vention are set forth in the following description, reference being made to the accompanying drawings, which show a few preferred embodiments, which however are not limiting. The drawings show in detail: Fig. 1 a window case in section with a frame having a swing¬ ing arm hold and a lock according to the invention in an open position after a release of the lock; Fig. 2 a corresponding view of a hold, slightly modified, in a partially open position without or before a release of the lock; Fig. 3 a) - m) various lock means according to the invention in plan and lateral views; Fig. 4 a) - d) partial views of a hold and a lock according to the invention in successive operative positions; Fig. 5 a sectional view along line A-A in Fig. 4 d) ; and Fig. 6 a) - d) views, which correspond to Figs. 4 a) - d) , of a slightly modified lock. In Fig. 1 a window case is designated 1 having a lower part 2, an upper part 3 and two lateral parts 4. All their sides, facing each other, are provided with a stop edge 5, against which a window frame 6 is designed to bear. Each one of la¬ teral parts 7 of frame 6 is provided with a swinging armhold 8, which holds are designed in a mirror-symmetrical fashion and suitably are recessed in case 1 in recesses, not shown, e.g. milled-out portions. Each hold comprises 4 arms, bars or the like, namely an outer bar 9, which, when the window is closed, can be substantially aligned with the exterior upper half of the frame side and is rotatably attached to the frame by means of a pivot 10, inserted into the frame, roughly in the middle of the frame at the lower part of the bar. The upper end of bar 9 is rotatably attached to the upper end of an upper arm 11, the other lower end of which is rotatably attached to the upper end of a basic bar 12, stationarily attached to the case, at the lower end of which the lower end of a lower arm 13 is rotatably attached, the upper end of which is rotatably attached to the upper part o outer bar 9, somewhat below the attachment of upper arm 11. The outer bar and the lower arm suitably always are straigh but the basic bar and/or the upper arm can be bent in va- rious ways. The upper arm preferably always is slightly bent, but the basic bar can be straight or bent according to Fig. 2. The outer long edge of the outer bar suitably is angled (not shown) in order to shield and protect the hold outwardly. Frame 6 is, besides its mounting on the hold on its pivot 10, also guided in the case by means of a runner 14, which is guided in a groove 15, which is made in lateral parts 4 and extends along all their height. Because of the different an¬ gular positions of the frame in relation to the case run¬ ner 14 is attached to the frame via pivot means 16. Preferably between the basic bar and the upper arm a lock 18 is rotatably mounted about their common hinge 17 and this lock is mainly disc-shaped with a transverse bore hole 19 in order to be mounted about hinge 17, which suitably is a shoul¬ dered rivet, a spacer 20 possibly being provided between the hinge and the wall of the bore hole, which is slightly lar¬ ger in diameter, in order to obtain a smoother rotation of the lock, the spacer possibly for this purpose also being slightly thicker than the lock, thus avoiding a binding of the lock, when the hinge is attached, e.g. by means of ri¬ veting. The lock is also provided with a lock recess 21, which is open mainly towards lower arm 13, to which a laterally pro¬ jecting holding element 22 is attached, e.g. a tubular rivet or a solid rivet, which possibly is provided with a head (not shown) in order to avoid that the lock unintentionally is released from the lower arm in a lateral direction. The lock recess can be designed in various ways, which are shown in Fig. 3. All the shown lock recesses have that in common that they are limited by a lock hook 23 on that side, which faces holding element 22, side 24 of lock hook 23, which fa¬ ces the lock recess, being designed to hold holding element 22, when the frame is swung outwards into its partially open position according to Fig. 2. For this purpose side 24 pre- ferably will be placed in an angular position in relation to the frame or the outer bar, which roughly corresponds to an extension along a circular arc, which is concentric with bore hole 19. Side 24 is straight or possibly slightly con¬ cave, and in this way it can be efficiently prevented that the lock unintentionally slides away from the holding ele¬ ment. Adjacent to side 24 the recess forms at the same side, pos¬ sibly via a short straight part 25, an inclined side 26, which deviates from a line between rotation center 19 and the lock position according to Fig. 2, which positively guides the lock into a rotation movement in clockwise di¬ rection in Fig. 2, which is clearly shown in Fig. 4c) and d) , until the holding element reaches its end position in the innermost end of the recess, which means that the frame now is completely recessed in the window case and conse¬ quently that the window is closed, and consequently the slightly oblong lock has been rotated from a position, which takes up a great deal of space and projects with a more obtuse angle from the basic bar, to a position, which takes up less space and projects with an acute angle from the basic bar. Thus, sides 24,25 and 26 are important primarily when the frame is moved from a partially open to a complete¬ ly closed position. In the opposite direction preferably just one side is important, which i " s;-designated " 27..and'""maiή;ly is situated opposite to side 26. Side 27 slides, when the frame is opened up, towards the holding element and brings the lock back to that position, which projects more marked¬ ly from the basic bar, provided the lock is not, because of the gravity, supported with its side 26 by the holding ele¬ ment, until the holding element either via a free movement reaches directly from the outermost end of side 27 side 24 or because of the gravity via side 26 and 25 reaches the same end position. This means that the functioning of the lock is secured irrespective of whether the gravity is ope¬ rative or is inoperative because of friction or other facto The lock is mounted according to the invention in such a way, that part 28, shown in Fig. 3 a) at any rate is exposed to the holding element, when the frame is moved from a comp¬ letely open position to an engagement with the lock. The hol¬ ding element suitably hits exterior side 29 of lockhook 23, which side is inclined in relation to a line between rota¬ tion center 19 and the holding element in said contact posi¬ tion, more precisely inclined in a direction inwards towards recess 21. In this way the lock will, when the frame is moved further inwards, be rotated in clockwise direction in Fig. 4 a) , until the holding element hits a preferably straight side 30, which is connected with an angle of bet¬ ween 120 and 60 degrees, preferably about 90 degrees, to side 27. Side 30 subsequently slides along the holding ele¬ ment and rotates the lock additionally in clockwise direc¬ tion, until the holding element slides into that portion of the recess, which is limited by sides 26 and 27, in which portion an automatic locking according to the description supra takes place. In case the holding element directly hits side 30, e.g. when the friction is inappropriate, the same will nevertheless be positively guided into its end posi¬ tion according to the description supra. In order to guarantee that the holding element will always hit a point along part 28, the lock is, according to a pre¬ ferred embodiment, within the area of the interior side of the frame in a partially open position provided with a se¬ curity recess 31, which interacts with a stop 32, which pro¬ jects from the basic bar. One end side 33 of recess 31 en¬ gages in the position shown in Fig. 4 a) the stop in such a way that the holding element is able to hit side 29. The other end side 34 of recess 31 is designed to guarantee,that the holding element cannot hit a point outside side 30, and suitably is formed by an actuation element 35, which is de¬ signed to be actuated manually in order to rotate the lock out of its engagement with the holding element. A portion of window case 1, e.g. stop edge 5, can as an alternative per- form the functioning of security recess 31 and portions in¬ teracting with this recess completely or partially. Thus, the lock according to Fig. 3 i) , k) is on that side which is opposite to recess 21 provided with projections 36, pro¬ jecting from recess 21, which are designed to hit the win¬ dow case and in this way define rotation limitations for the lock, corresponding to recess 31 etc. However, also in this case an actuation element 35 can be used, which consequently in all cases projects from the plane of the lock inwards towards the center of the frame in such a way, that it is possible to grip this element, which however is positioned comparatively high up on side 4 of the frame and carefully concealed (see Fig. 2) in such a way, that it is positioned outside the normal reach of children and is dif¬ ficult to detect because of its minor cross-section or end surface. In Fig.3g recess 31 is completely enclosed in the lock.

Claims: Claims ; 1. A swinging arm hold (8) with a lock (18) designed for win¬ dows (1,6), shutters and the like, which comprise a case (1) with a lower part (2) , an upper part (3) and two lateral parts (4) , in which a frame (6) is rotatably mounted by means of two mirror-symmetricly identical holds (8) , each one comprising an outer bar (9) , which when the window is closed is designed to be mainly in line with the outer upper lateral half of the frame and is rotatably attached to the frame by means of a pivot (10) , inserted in the frame, roughly in the center of the frame at the lower end of the bar, while the upper end of the bar is rotatably attached to the upper end of an upper arm (11) , the other lower end of which is rota¬ tably attached to the upper end of a basic bar (12) , statio¬ narily attached to the case, at the lower end of which the lower end of a lower arm (13) is rotatably attached, the up¬ per end of which is rotatably attached to the upper part of the outer bar (9) slightly below the attachment of the upper arm (11), c h a r a c t e r i z e d in that said lock is rotatably mounted on a common hinge (17) for the basic bar (12) and the upper arm (11) , preferably between these parts, in that said lock in a way known per se is provided with a - lock recess (21) , designed to interact with a holding ele¬ ment (22) , which projects in a lateral direction from the lower arm (13) , on each side of the lock recess guide sur¬ faces (29 and 30 respectively) for the holding element bei- ing disposed, and in that the innermost part (26,27) of the lock recess (21) has an extension, which runs with an acute angle in relation to a line between any part of the recess and the rotational center (19) of the lock, mainly designed to, during the last part of the rotational movement of the frame, give the lock an idle position, which takes up less space, and allow the frame to occupy a slightly further out¬ wardly rotated partially opened position with a smaller lock load respectively. 2. A swinging arm hold according to patent claim 1, c h a ¬ r a c t e r i z e d in that the upper arm (11) is slightly outwardly bent, preferably adjacent the attachment at the outer bar (9) , and in that the basic bar (12) is straight or slightly outwardly bent, preferably adjacent the attach¬ ment at the lower arm (13) . 3. A swinging arm hold according to patent claim 1, c h a ¬ r a c t e r i z e d in that the lock mainly is disc-shaped having a transverse through bore hole (19), designed tomou the lock about the hinge (17) for the basic bar (12) and fo the upper arm (11) , which hinge preferably is a shouldered rivet, a spacer (20) being mounted between the hinge and th wall of the bore hole, having a slightly larger diameter, in order to secure a smoother rotation of the lock, and the spacer being made somewhat thicker than the lock in order t secure said smooth rotation also in a transverse/axial dire tion. 4. A swinging arm hold according to patent claim 1, c h a ¬ r a c t e r i z e d in that said lock recess (21) on one o its sides facing the holding element (22) is limited by a lock hook (23) , the side (24) of which which is facing the recess being designed to retain the holding element, when the frame is rotated outwards to a particularly open posi¬ tion, which side preferably occupies an angle position in relation to the frame or the outer bar, which roughly 'corre sponds to an extension along a circular arc, which is con¬ centric with the bore hole (19) , or an extension, which is tangential to such a circular arc, and in that the side (2 is longer than the diameter of the holding element and, if it is bent, has a substantially larger bending radius than the holding element, i.e. a slight concave shape. 5. A swinging arm hold according to patent claim 4, c h a r a c t e r i z e d in that said side (24) , which constit a limit between the lock hook (23) and the lock recess (21) possibly via a short straight part (25) , is connected to said innermost recess part (26,27) , which is designed to guide the holding element (22) without any at least substan¬ tial play and to rotate the lock to and from respectively the idle position, when the window is closed, the one side (27) of said innermost recess part being connected to one of said guide surfaces (29,30) , which side (30) preferably is at least substantially straight and is connected to said one recess side (27) with an angle of between 60 and 120, preferably about 90 degrees. 6. A swinging arm hold according to any of patent claims 1-5, c h a r a c t e r i z e d in that the side (29) , which limits the lock hook (23) outwardly, jointly with the side (30) , which on the other side limits the lock recess, consti¬ tute a part (28), which is always positively exposed to the holding element (22) , the positive exposure being secured by means of one or several rear recesses (31) in the lock, which interact with a stop (32) , which projects from the basic bar (12) , stop surfaces (33,34) being formed and/or being secured by means of one or several rear stops (36) , designed to interact with the case or another stationary part. 7. A swinging arm hold according to any of patent claims 1-6, c h a r a c t e r i z e d in that in a transverse di¬ rection from the lock, preferably in the form of or connec¬ ted to one of said stops (33,34) , actuation means (35) pro¬ ject, designed for a manual actuation of the lock and a cancellation of its lock operation in a partially open po¬ sition.

Inventors: BLOMQVIST BERTHOLD, BLOMQVIST ROLF, BLOMQVIST, BERTHOLD, BLOMQVIST, ROLF
Applicants: TEKNOSKAND INVENT AB
Application year: 1990
Main classification: E05D15
IPC codes: E05D15