SE460612B - OPEN ARM MECHANISM FOR DOOR LOCKERS - Google Patents

Description

. , ¿.- n. ~ - »» 460 a12 ° i 10 15 20 25 30 35 z ~ especially in public premises, business premises and ~ fa similar - mechanical door openers. These take care of not only a closing of the door but also the opening of the same, more precisely by some form of remote fl fäï operation which electrically activates one with door associated hydraulic unit. Pjärrmanöversyste- then The met usually consists of manually actuable pressures placed at a distance in front of the door or by photocells which automatically detects whether a person is approaching the door and then it opens. Common to the past known door opener devices, however, are that they are very expensive in manufacturing and installation. One another significant disadvantage is that any power outages makes it impossible to manually open the door before a special manually switched switch from one position to another to another. To the extent that panic or panic-like situations tions occur in a room affected by a power outage before adjustment of the door opener has taken place, can the consequences become dangerous.

Attempts have been made in the past to supplement it simple and affordable door closer with a special openarma'fnism, which can be temporarily activated for to achieve a mechanical opening of the leg / the door against the action of the door closer. Such an opener _mechanism-related mechanism is earlier known from U.S. Patent 4,348,835. This known mechanism is, however, associated with a number of inconveniences.

Thus, the mechanism of US 4348835 is used of a transmission in the form of two cooperating, oblique cut gears or angle gears, one of which is permanently torsionally rigidly connected to that shaft to the door closer which has the task of turning and tighten a spring arrangement in the door closer then the door opens and brings together an arm to swing, while the second angular gear is connected to a remote man ~ other electric motor. To in the normal state be out of engagement with the door closer this must second angular gears not only be rotatable but also axially f * movable in any manner not further described in the patent; _ implying that the construction, if at all can be done in practice, becomes particularly expensive and complicated. Furthermore, the cogs in both are required the gears at each individual intervention are kept precise fitted against each other, for otherwise both arise one troublesome rattling as a delay of correct intervention. Another inconvenience with the known construction tion is that the opener operates at a constant speed during the entire opening process, in which case the motor is not controlled in a special way. It may also be mentioned that the construction according to US 4348835 requires a special device for to keep the door open for the time required passage through the door.

Brief description of the inventive concept The present invention aims to eliminate the above-mentioned disadvantages of the one known by OS 4348835 opener mechanism and create an affordable opener mechanism which is reliable and which works without affecting the function of the conventional door closer with respect to on the above-mentioned power-on effect. This is achieved accordingly with the closest feature of the invention through that the carrier means is arranged to move itself rectilinearly between its end positions and that upon activation affect an auxiliary arm rigidly connected to the pivot shaft which extends at an angle to the carrier member rectilinear trajectory to be affected by a comparative large lever during the initial stage as well as the the opening stage of an opening operation, but with shorter lever during an intermediate stage.

Brief description of the accompanying drawings' - On the drawings are Fig. 1 is a plan view from above of a door closer together one applied to this runner mechanism according to the invention, I Fig. 2 is a vertical front view of the opener mechanism, and ,. sf. ' ßoihmz 10 15 20 25 30 35 a perspective view showing an opening mechanism applied to a door.

Detailed description_of a preferred embodiment š! _22EÉiE2i2¶EE A W In the drawings, l generally denotes a door closer reg which in a manner known per se includes a house F 2 which supports a pivot arm via a rotatable shaft 3 4 which in turn are articulated with a link: 5 having a bracket 6 which is applicable to the revolving door or door leaf. The house itself 1, in turn, is applicable to the surrounding door the wall or frame, more specifically in the area immediately just above the door. The rotary shaft 3 can advantageously be throughout to allow mounting of the swingarm 4 on either side of the house for the purpose of enlightening application of the door bar for both right-hung as left-hung doors. When opening the door manually FIG 3 the arm 4 is turned in the clockwise direction according to Fig. 1, whereby the same via the rotary shaft 3 clamps or compresses a spring mechanism built into the housing (not shown) which after the opening movement is completed, an automatic is provided return of the door to the closed position.

On the conventional door closer 1 is built an opener mechanism designed as a special additive according to the invention. This opening mechanism includes an electric motor 8 mounted on a stand 7, one in in its entirety with 9 designated transmission as well as in this case two carrier means l0, l0 '. Carriers 10,10 'advantageously has the shape of wheels or bearing pulleys arranged on a shaft ll supported by a reciprocating, sled-like part 12. Specifically the carriage part 12 is rectilinearly movable back and forth along a guide 13 fixedly mounted on the frame 7. conveyor means serving the pulleys 10,10 'are provided to cooperate with a pair of auxiliary arms 14,14 'which are rigidly or rigidly connected to one and the same walking shaft 3 with which also the pivot arm 4 is rigid ;;.: ~~ »ß 10 15 20 25 30 35 f. .reach 4eo “s12fv 5. A 1, connected. These auxiliary arms 14, 14 'extend in gg acute angle to the swingarm 4 and also in acute, É: angle to the rectilinear path of motion as the pulleys' * q 10,10 'describes when the carriage 12 is displaced along guide 13.

The electric motor 8, which in practice can consist of a conventional windscreen wiper motor, has an outgoing, driving shaft 15 with a ring gear 16 which is torsionally rigid connected to the shaft. The transmission 9 consists in it showed the example of a chain laid around the gear the ring 16 and which at one end is via a bracket 17 fixedly connected to the carriage 12, while the other end of the chain is attached to a relatively weak tension spring 18 whose end remote from the chain is attached to the stand 7 at a point designated 19. In the attachment point or part 17, one end of a second tension spring is further attached 20 whose opposite end is attached to the frame 7 at the point 21. This second tension spring 20 is advantageously stronger than the first spring 18. The motor 8 is in practice suitably controlled by an electronics circuit with a built-in time relay or the like by means of which the drive shaft 15 can be caused to first rotate in a counterclockwise direction according to Fig. 2, then stand still in a given position below a certain period of time and finally brought to rotate in the opposite direction of rotation.

As can be seen from Fig. 2, the carriage 12 can on itself known way to be guided along the guide 13 by means of a fall in an endless configuration arranged balls 22.

The described opening mechanism works as follows method: If you want to open the door in question on mechanical path by means of the opener mechanism according to the invention the motor 8 is activated in a suitable manner, eg by actuation of a print or the like. The shaft is brought here Rotating counterclockwise according to Fig. 2 with the intermediate the gear ring 16 and the attachment point 17 extending the part of the chain 9 sets the carriage part 12 in rectilinear motion in the direction to the left in Fig. 2. Here they come as . 1: 4. . l46ow612% É 10 15 20 25 30 35 si: .. _, carrier means serving the pulleys 10, 10 'to carry auxiliary arms 14 and pivot them while rotating shaft 3, whereby also the pivot arm 4 together with the associated s control arm S is caused to pivot while opening the door. P Movements of the carriage part and the carriage means 10,10 ' between the two opposite end positions can in practice determined by two limit switches 23,24, wherein the distance between these can be chosen so that the mechanism opens the door to, for example, a position 90 'to it closed mode. After the door has been opened, for example 90 ' the engine 8 is stopped and allowed to stand still for a suitable time period of time, eg 5-30 seconds, after which the engine is reversed so that the drive shaft is caused to rotate in a clockwise direction according to Fig. 2. In this case it comes as a return spring serving the tension spring 20 to return the carriage part 12 to the initial position shown in Fig. 2. During as well the forward movement as the return movement of the sled sets the spring 18 to be laid around the ring gear 16 the chain is kept neatly stretched. Hed advantage is rotational the speed of the drive shaft 15 of the engine so chosen to the carrier pulleys l0, l0 'move faster than the auxiliary arms 14 so that the carrier pulleys release their contact with the auxiliary arms as soon as the return movement of the sled commenced. As a result, the door closer l remains ordinary closure characteristics unaffected by carrier pulleys whereby the switch-on built-in in the door closer 1 the effect at the end of the door closing automatically occurs without hindrance of the carrier pulleys.

Another advantage of the described opening mechanism is that the opening movement becomes comparatively calm in both the initial stage and the final stage. but on the other hand, more quickly in the intermediate stage, in the pulley 10,10 'during its rectilinear' motion acts on the auxiliary arms 14,14 'with comparatively large lever during the initial and final stages, but on the other hand with shorter heat during the intermediate stage, r since the auxiliary arms extend close to 90 'towards the carrier the rectilinear path of motion of the pulleys. n _, _ yt-ëïg fi r 10 15 20 25 >, fv _ '.;: a§'., ._ ~ ¿, _¿g, _- ¿._ .., - w »fa .Magi - ~:, - f_wf ~) ï ~ - - ^ ii '~~ f '- I ._ f Ü: ewo 612d'ile ”p _ 7 In case the passer-by does not wish to use g the opening mechanism remains the two carrier pulleys: 10,10 'in their inactive positions or initial positions according to Figs. 1 and 2, with manual opening of the door on completely conventional way provides that the spring rabbit in the housing 1 is compressed in and for subsequent auto- automatic closing of the door. This can be done because the arms 14,14 'at the manual opening simply releases the contact with the carrier pulleys 10,10 'and passively, the shaft 3 is included in its rotational movement.

. In comparison with that of U.S. Patent 4,348,835 known opener mechanism is the opener according to the invention. the mechanism is extremely inexpensive and offers in combination tion with the equally affordable door closer one economically very competitive alternative to the conventional door opener. It should be pointed out that the inventive mechanism according to the invention not only can be carried out as a separate additive as in can subsequently be mounted on an existing door post, but can also be performed as an integral part of the door closer.

It is a given that the mechanism can be modified on many ways. Although it is preferred to perform the same with two carriers and two auxiliary arms (which provide a distributed force effect on the opposite sides of the sledge) it is thus conceivable to perform the mechanism with just such a body. Furthermore, the body in question consist of projections other than just one wheel.

Claims (7)

10 15 20 25 30 PATENT REQUIREMENTS Opener mechanism for door pliers of the type V which comprises a housing (2) which can be mounted on a wall and which, via a rotatable shaft (3), carries a pivot arm (4) which can be connected to a door or the like, which on opening the door the housing built-in spring mechanism is temporarily tensioned or compressed to automatically return the door to the closed position after the opening movement has ended, the opening mechanism comprising a reciprocating means by means of an electric motor (8) via a mechanical transmission (9) between an inactive position or initial position and an active position movable carrier means (l0, l0 '). which on the one hand when manually opening the door remains in its inactive position in which it leaves the swivel arm (4) unaffected and on the other hand when activating the motor (8) sets the swivel arm in motion during execution of the door opening without the need for manual action characterized in that the carrier means (10, 10f) is arranged to move rectilinearly between its ends and to act upon actuating an auxiliary arm (14, 14 ') rigidly connected to the pivot shaft (3), which extends at an angle against the rectilinear path of movement of the carrier means in order to be actuated with a comparatively large lever during the initial stage as well as the closing door, the opening stage of an opening operation, but on the other hand with a shorter lever during an intermediate stage. 2. An opening mechanism according to claim 2, characterized in that the carrier means is in the form of: a wheel (10) arranged to roll along the auxiliary arm (14) during pivoting thereof. 3. An opening mechanism according to claim 1 or 2, characterized in that the carrier means or wheel (10) is arranged on a sled-like part (12) which is movable back and forth along one with the housing (2). 20 25 30, J fi vwï ja-yšïvfufššçälaâéblsfzfïggæaæší fast förbunden gejd (13). 4. An opening mechanism according to claim 4, characterized in that the slide part (12) comprises two lowering wheels (10, 10 ') arranged to actuate a pair of auxiliary arms (14, 14') arranged at opposite ends of a per se known rotating shaft (3) through the housing (2). - 5. An opening mechanism according to any one of the preceding claims, characterized in that the carrier means (10) is arranged to move faster than the door post helper (14) during its return movement from the active end position back to the initial position, whereby the ordinary closing characteristic of the door post remain unaffected by the carrier. Opener mechanism according to one of Claims 3 to 5, characterized in that the transmission comprises opposite chains placed around a toothed ring (16) on the drive shaft (15) of the motor (8) and having opposite ends, of which a is connected to the carriage part (12) and the other to a first tension spring (18). wherein a second tension spring (20) serves as a return spring for returning the slide part (12) to the initial position. 7. An opening mechanism according to any one of the preceding claims, characterized in that it has the form of an additive which can subsequently be mounted on an existing door closer of a per se known or arbitrary type.