DE1584210B1 - Hinge with torsion coil spring for covers or flaps that can be pivoted about a horizontal axis - Google Patents

Description

The invention relates to a hinge with a torsion coil spring for covers or flaps which can be pivoted about a waa g real axis, e.g. B. for freezers or entry openings of stairs, the torsion coil spring the pivot axis ui-n- "matures and is fixed with its one end on the fixed part and with its other end on the lid.

There is already a hinge for containers to be closed from above by a lid, in particular household machines, in which a hinge tab in a strip-shaped housing on an axis rotatable in bearings attached to the top of the household machine against the force of a helical spring, which between a standing part and a rotating part -e-7 C is switched, is rotatably mounted. This creates a strip-shaped body with two protruding hinge tabs, which is attached flush to the upper side of the device on the housing or cover.

Due to the built-in energy storage springs, the cover is in Offenlaae The energy storage springs also exert a break when the cover falls Effective from causing injury to the operator or damage of the dishes is avoided.

So that the known springs are only attached to save space, it is but not possible to pretension the springs or to reduce them change.

The inventions has for its object to provide a hinge, which on this side of a DC (yewichtstaae a hinged lid in the Offenstelluno, C bewe2t 2 e and designed therein with and so that the lid enseits this Gleichaewichtsla-e under the The hinge should be easy to adjust, be it that its characteristics can be changed for a geo-level lid, or that it can be used for a whole series of lids with different weights.

This task is achieved according to the invention in that the torsion coil spring is adjustable and pretensioned in such a way that it exerts a moment in the direction of the completely open position of the cover, and that the pretension and the spring characteristics are selected so that the return torque into the open position of the force of gravity on the lid (, eübten force is equal in an intermediate position on this side of which the cover upward into the open position and beyond which it is down in the Schließstelluno, aedrän-t As a result, he-C Z2. - It is sufficient that one and the same hinge can be used for lids of different weights. The pivot axis can be designed as a pivot pin which is rigidly connected to the best part by means of a band, the torsion coil spring with one end on the articulated fence and the other end The outer end of the pivot pin is advantageously provided with a prismatic head, de r matures into a multiple hole in the band and even has a prismatic blind hole for the Ein-Criff of a turnbuckle.

The cover can swing around the pivot pin by means of two Lauer, between which the Tor-C sion coil spring is arranged. Z? The pivot pin is expediently very short, sleeve-shaped and prismatic, and the cover rotates around this pivot pin only by means of an outer shaft by means of a sleeve with a prismatic inner surface and a cylindrical outer surface.

When using two hinges, the polygonal hole in the one band with respect to the polygonal hole; angularly offset in the other band so that the rule positions can be multiplied.

The drawing shows two exemplary embodiments of the invention.

It shows C F i 1 a perspective view of a chest equipped with two hinges according to the invention, F i 2 a side view of the ceiling hanger in FIG. 1, Fig. 3 is a partial longitudinal section along line 3-3 of FIG . 2, fig. 4 shows a cross section along the line 4-4 in FIG . 5 by another embodiment of the C cl hinge, F i a. 5 is a partial longitudinal section along line 5-5 of FIG . 4, fig. 6 is a perspective view of a sleeve according to FIG. 5, F i 7 a graphical representation for the computational determination of the forces in view of the force of gravity acting on the lid or the door of the chest, and F i - 8 a graph showing the sinusoidal change for a number of lids of different weights the forces in accordance with the CC to cover gravity acting and on the other hand, the linear Änderuna the Ge enkräfte the springs shows the values of the forces are applied in the ordinates as a function of the size of the angle x, which is plotted as abscissa and the Forms cover with the perpendicular.

According to the wiederaeuebenen in F i 1 Ausführun (Ysbeispiel which is provided with a cover C and the sealing strip D Chest A has two hinges B and B 'which are arranged symmetrically to each other and sitting on the inside of the cover C on one of its longitudinal edges. The two hinges B , and B., are attached to the chest A by two straps 1 which are fastened to the chest A by three screws 2, the inner wall of which these screws 2 can be reinforced by a reinforcement plate 1b (FIG. 3) Both J edges 1 are drilled through at the upper ends with a multiple hole 3. namely a hexagonal hole. The straight line XX passing through the middle of the hexagonal holes forms the axis of rotation of the lid C aeaen over the chest A.

According to the embodiment of FIGS. 2 and 3 , each of the two hinges has a cylindrical pivot pin 4 which is provided with a hexagonal head 5 which interacts with the hexagonal hole of the band 1 ; This hinge pin 4 is infol gedessen 'with respect to the chest A fixed and aligned parallel to the longitudinal edge of the cover C. The cover C is attached to this pivot pin 4 with the aid of two bearings 6 and 7 ( FIG. 3), which are fastened to the cover C with screws 8 (FIGS. 2 and 3). A torsion coil spring 9 sits on the pivot pin 4, one end 10 of which is fastened in a longitudinal slot 11, which is attached to the end 12 of the pivot pin 4, and the other end 13 in the Laaer 6 , e Z that with the cover C through the screws 8 is connected. In order to prevent that the Gelenkzaofen 4 jumps out from the Laa 7, a geschiitzter, C c # elastic ring 14 is set to the pivot pin 4 in a Ausnehmun- at the end of the 12th Finally, a prismatic sleeve 15 with a square cross section receives the torsion coil spring 9 and the pin 4 and is closed at its end 2i by the parts 6 and 7 , the 2int2r part 17 of which is used for insertion.

The hexagonal head of the Gclcnkzapfcns 4 is provided with a hexagonal blind hole 511, which is used to insert a hexagonal key. This is used to regulate the tension of the torsion coil spring9. To do this, the key inserted into the hexagonal hole 5b is held in place, the band 1 is unscrewed, if it has already been attached, and the torsion coil spring 9 is tensioned by turning the key. Then put tape 1 on and fasten it to chest A.

F i 4 and 5 show a hinge according to another embodiment of the invention. As in Fig. " and 3 , the two lateral straps la are provided with a multiple hole 311 in the form of a hexagonal hole, the screws 211 and the strap 111, like the la! zer 6, are connected to the ceiling! C with the screws 811, and the torsion coil spring ga sits in of the sleeve 15.1. This hinge also has a pivot pin 16, but this is shorter than in the first embodiment and does not extend all the way into the toision coil spring ga. The pivot pin 16 is prismatic with a hexagonal cross-section and hollow, and its rotation; n The bearing 611 is secured by a tubular sleeve 18 made of plastic, such as polyethylene or d21., which is shown in Fig. 6. Its inner surface 1811 is prismatic, namely hexagonal, while its outer surface lW is zvlindrisch This sleeve 18 is pushed onto the Gelenkzapfcn 16, around which the La., - he can rotate ls 6.1 ebenfa Two aeschlitzte ring P 19, and 20 of the pivot pin in recesses!.. 16 , prevent the sleeve 18 from sliding after it has been placed on the pivot pin 16 . The pivot pin 116 is hollow. and the inner end on the side of the torsion coil spring 9 is provided with a longitudinal slot 21 with parallel edges and of a certain depth, into which the end 22 of the torsion coil spring 911 is inserted. This is supported by its other end to a slot 24 from which is seen forth in a rod 25 on the axis XX, which is connected to a held by screws 8a on the cover member 26 C (F i g. 5). A hollow, prismatic sleeve 15.1 with a square cross-section connects the bearing 6.1 with the part 26.

The torsion coil spring can also be connected to a prismatic part which can slide in the part 26 without rotating, by welding or some other cyeei-netes connection means.

F i 7 shows the cover C and the angle x which the cover C forms with the perpendicular V in a schematic cross-section. If m and P are the size and weight, respectively, of the lid C, then the torque is the force of gravity with respect to the axis of rotation . is chosen because the cover C is equipped with two hinges in the embodiment example described and drawn.

F i -g. 8 graphically shows the change in torque required by the action of gravity on the cover in relation to the axis XX. Four curves E, F, G and H are shown in the figure. the four lids of different weights of 0.1, 17.3 and 22.6 kg and # z1eichen Abr-i.essuz-i-2cn correspond. The forces exerted by gravity change sinusoidally as a function of the angle x. In contrast to this, it is well known that the torque of a spring is proportional to the angle of rotation. It is: twisting force = k x, where k- is a constant of proportionality and x is the twisting angle.

The curves which this linear change, again, are parallel straight lines R, which differ by their initial coordinates. When the spring at C perpendicular stationary lid in Ruhela2e, d. That is, if it is not subject to any tension as a result of the above-described Re2elun #, pre-tension, the C 112 = C curve R 0 reflects the change in the restoring force of the spring when the lid is closed. If the cover is perpendicular and the spring is still tensioned, CZ gives the straight line R an ordinate at the beginning, which C indicates the bias of this spring. Each straight line R in FIG . 8 corresponds to a different preload of the said spring. The straight line R 1550 C corresponds to a »preconservation« expressed in degrees, namely 156 '. When the lid is perpendicular, the spring tries to pivot it backwards. An attachment that is not shown is therefore necessary to ensure that the cover works properly.

C A lid with a weight of 12 ka is used as an example. The curve F in C F i ' g' corresponds to this. 8. Using the handle described above, the spring is given an initial tension, 2, which corresponds to a C rotation of 150 '; this is represented by d »II-1 zz curve R 150 . The curves F and R 150 intersect in the diagram in a point PM C corresponding to a position of the cover which is called "Tot-1a2e". Diessei-ts this position PM zei C # C that the restoring force of the spring acting on the cover force Überle-ene, so that the lid relative to the vertical Stellunc is zurückaeholt out. CC Jense: ts this position the gravity of the lid is stronger and the lid is pushed down into the closed position.

CC - The in the embodiment of the invention, used spring has tight ancin C-C on the other, their diameter is 15 mm forty Winduncren, and the steel wire is 1.5 mm in diameter. c In the drawing, C the spring is shown for the sake of clarity with the coils that are not adjacent to one another.

VCC It is possible to choose the hardness (of the spring so that the inclination of the straight line R is more or less strong. In this case, at the same given dead point, the obtained forces of pretensioning and closing are just as much weaker . as C the slope of the straight line R is stronger.

In the illustrated and described embodiment, the cover is equipped with two spring cr-links. It has been shown how the 9 rules can be carried out by the interaction of the hexagonal head of the pivot pin with the hexagonal blind hole in the fastening strap of the chest. The tension control of the C e ZC spring can be done by turning it 60 ' at each joint.

If the hexagonal (yen holes in the two joints have the same angular position, it is easy to see that the straight line R for the two joints are identical and two curves R 150 and R 331) can be combined, for example, to give a given "overall projection" In order to obtain a better and finer result, it is possible, for example , to adjust the two hexagonal holes at an angle to one another, for example by 30 ' , so that the device can be adjusted 1 g finer.

Likewise, a lid or a door can be provided with only one hinge be, however, provided that a second pivot pin is provided is.

You can also have a hinged lid or a hinged door with two hinges equip according to the invention, but omit the spring in a joint if the force of a spring is enough to ensure good work.

In addition, the sleeve 15 or 15.1 can be cylindrical instead of prismatic. Furthermore, in all cases the sleeve can be filled with a lubricator for lubrication of the whole joint and prevention of any noise.

The hinges can also be attached to the outside of the lid; particularly in the case where the lid has a relatively high weight, this is Interesting arrangement because it allows the number of hinges to be increased.

C.

Claims (1)

Claims: 1. Hinge with torsion coil spring for covers or flaps that can be pivoted about a horizontal axis, e.g. B. for freezers or entry ' g' of stairs, the torsion screw Ceder grips the pivot axis and is fixed at one end to the fixed part and at its other end to the cover, characterized in that the torsion coil spring (9, 911) is adjustable and is pretensioned in such a way that it exerts a moment in the direction of the fully open position of the cover (C) , and that the pretensioning and the spring characteristic are chosen so that the return torque into the open position is caused by gravity on the LI, 2n cover (C) The force exerted in an intermediate material, light is, this side of which the deck egg (C) is pushed up into the open position, and beyond which it is pushed down into the locking part # .z. ir according to claim 1, characterized in ge-§c # arn'e. that the pivot axis (XX) is designed as a pivot pin (4, 16) which is rigidly connected to the fixed part by means of a band (1, 111), the torsion coil spring (9, 911) with one end on the pivot pin (4. 16) and is attached at its other end to the cover (C). 3. Hinge according to claim 2, characterized denotes Ge, that the outer end of the Gelenkzapiens (4, 16) is provided with a prismatic head (5, 5a), into a polygonal hole (13, 3a) in the tape (1 la) engages and itself has a prismatic blind hole (5 #) t; ür the engagement of a wrench. 4. Hinge according to claim 2 or 3, characterized in that the cover (C ) swings around the pivot pin (4) in two bearings (6, 7). C - between which the torsion coil spring (9) is arranged. 5. Hinge according to claim 2 or 3, characterized in that the pivot pin (16) is very short, sleeve-shaped and prismatic and the cover (C) around this pivot pin (16) only in an outer bearing (6,1) by means a sleeve (18) with a prismatic inner surface and a cylindrical outer surface rotates. 7, hinge according to one of claims 3 to 51, characterized in that when using two hinges (B1, B.,) the polygonal hole (3, 3a) in the band (1, ia) is offset angularly so that the positions can be multiplied.