EP1258588A2 - Vertically folding gate for garages and the like - Google Patents

Abstract

The invention relates to a foldable gate for garages and halls with a door leaf, which consists of two hingedly connected, approximately equal door leaf halves, of which the upper door leaf half 8 is pivotally mounted at its upper edge above the lintel 13 on a lintel frame 11 and of which lower door leaf half 9 at its lower edge with laterally projecting rollers 17 in rails 18 from a closed position, in which the two door leaf halves protrude folded approximately horizontally, vertically movable. Balance weights 40 ensure a weight balance when opening and closing the door leaf 7. They hang on ropes that run over pulleys 46 to the lower edge of the lower half of the door leaf. In the area of the upper edge of the upper half of the door leaf 8, an electrical self-locking geared motor with at least one belt roller 37 is attached, on which at least one tension belt 38 can be wound and unwound, the free end of which leads to an actuating rod 24 that is operatively connected to the lock 20 and at Tightening the tension belt 38 against spring preload is pulled back against a stop, whereupon the door leaf opens in a folding manner. Due to the counterweights and taring weights 50 that can be releasably attached near the lower bottom edge of the door leaf, the door can be easily opened and closed even in the event of a power failure. <IMAGE>

Description

The invention relates to a motor-driven ceiling or lift folding door for garages, Halls and the like with weight compensation and motor drive for opening and Close and refers primarily to the interaction of the motor drive and its lifting, lowering and locking and unlocking mechanism for both the electric drive as well as for manual operation. In an adapted form it can Folding gate also as a window shutter, especially for shop windows or shops, be used. All of these embodiments are hereinafter referred to as short folding doors called.

Folding gates are available for garage, hall and other openings in various designs known. Most of the gates or window shutters are the two Door leaf halves of approximately the same size (AU-A-18,260 / 70, US-A-2,393,052, US-A-3,504,249, US-A-4,448,232, DE-C-2 001 349, DE-93 01 447.3 U1). In some embodiments the lower door leaf part is up to 50% larger than the upper (WO 96/12078, US-A-4,026,343, DE-A-1 708 428). On the other hand, the upper part of the door leaf can also be slightly higher be formed as the lower one (US-A-3,224,493). Automatic locking or unlocking mechanisms with standard gate locks with security cylinders are unknown. Known gate locks are rather adapted to special needs. at manually operated (sectional) gates with in the side door frames or guide rails engaging locking members (US-A-1,724,995) is a disc on the axis of rotation provided on which the linkage of the locking members is articulated and thus the Do not attack a tension belt or other part that is moved by a motor drive is possible.

There are various mechanisms for balancing the weight of the door when opening and closing known that either provide spring structures, as they are similar to overhead swing gates be used. Furthermore, in the area of the lintel are horizontal Attached torsion spring lifts are used, which are attached to a rope at the lower end of the lower Attack the door leaf part, as is known from sectional doors. Likewise come only balance weights are used, which hang on a rope, which over a pulley in the Area of the lintel led to the lower part of the lower half of the door leaf and fastened there (DE-A-1 702 428, AU-A-18,260 / 70, similar to WO 96/12078).

What these gates have in common is that they are more or less strong at the height of the gate opening reduce that sometimes powerful and therefore expensive door drives are required, that a second garage access or structurally complex or complicated compensation mechanisms are necessary to open them manually and even in the event of a power failure Closing the gate, at least from the inside, to allow that, if lateral Balance weights are provided on ropes, under difficult weather conditions, in particular storm or ice and snow the opening or closing process can be initiated without manual help, and that a subsequent installation of a Gate drive, if this was not planned from the outset, is hardly possible.

The invention is based on the technical problem, some or all of these disadvantages to eliminate and a reliable, automatic function of the gate to open and to allow closing. It is said to be an inexpensive and safe electrically actuable Electric drive can be provided, even in the event of a power failure with the counterbalance enables easy manual operation from the outside of the door, which interacts with locking and unlocking the gate, in particular when international locks with security lock cylinders are used and one or more spring-loaded actuating rods or Bowden cables with spring-loaded Locking elements (snap locks) are provided, which are on the side of the door frame, attack the door reveal or the guide rail. In addition, not only at the electrical actuation ensures safe automatic initiation in all operating conditions the locking process possible and secured if necessary. Only after the automatic Unlocking the gate is with the support of in or on the side frames or in Space-accommodating door counterweights the motor divided in the middle slowly pull up to the open position. Alone or with the electric motor It should be possible to hold the transmission lock in the open position. With radio remote control the closing of the gate should always be initiated without outside help. A good weight balance should make a drive motor of low performance to be required.

A solution to this problem is with the forms in the appended claims characterized.

The invention provides for an outwardly opening door leaf, i. H. on the outside the outer wall next to the gate opening, one at the top of the upper half of the door leaf attached to the inside self-locking electrical Geared motor (with gear lock). This drives a belt reel, the tension belt attacks the roller on the one hand and a movable confirmation rod on the other, those with the spring preload provided for all gates Lock rod of the usual gate lock is connected. When initiating the opening movement the locking elements actuated by it are e.g. about Bowden cables or the like. Retracted from its locked position and then raised the gate. The one that is connected to the lock bar that can be moved back and forth In contrast to known gates, the operating rod itself has a direct effect no more locking function. Due to the intended weight balance, a easy lifting and - under your own weight - lowering the door leaf from the open position possible in the closed position. The motor is controlled in itself known way, e.g. via a button, a switch lock or a radio control. This opening and closing process is only due to the direct interaction of the Weight balance with counterweights on the door leaf and on the operating rod attached tension belt, which interacts directly and only with the motor. The Lock mechanism includes a hand-operated in a known manner on the spring-loaded lock rod opening handle and a security cylinder to shut off. In this way, unlocking is also possible in the event of a power failure and manual opening of the gate possible. On the other hand, it does not need any direct or indirect Lock operated to open the motor. Laterally with the door frame o. The like. Interlocking locking latches can be used with a rod with rods and (Tilt) levers or Bowden cables are operated and especially in the area of the articulated connection snap the two halves of the door into the side door frames.

With an inside, e.g. B. in a hall or garage, opening door leaf, that is Door installed on the inside of the outer wall and in front of and above the door opening. In this case, the gear motor for opening the gate is not on the inside of the upper one Half of the door, but in the area of the lintel on the inner surface of the outer wall next to the gate opening provided. The pull belt driven by the motor is therefore also next to the gate opening to a rocker arm, which on the inner surface of the lower half of the door leaf is mounted and on an actuating rod connected to the lock rod is articulated and extends laterally beyond the door leaf.

In the event of a power failure, the door can also be easily operated manually because of the Door drive does not need to be decoupled from the lower half of the door leaf. Conveniently, the belt is, for example, in the area of the joint connection of the two door leaf halves hooked into a resilient eyelet so that it does not enter the open gate when opening to hang.

The gate can therefore be in front of or behind the gate opening on the wall (outside or inside) so that it folds outwards or inwards over the lintel and forms an acute angle in this position. The whole gate opening is always free; no part has to be in the gate opening, e.g. B. the passage protrude.

An embodiment of the fold-up gate to ensure automatic closing provides that two soft coil springs are provided on each side, each in the area the bottom half of the door leaf on the door frame so that they reach the door shortly before the open position against the opening force and movement in the closed position trying to pull. The attachment should therefore be done in such a way that this counterforce is increasingly generated only towards the end of the opening movement. This can be done happen that the top end of each coil spring is fixed in a carriage is in front of the opening process on or in the side track of the door Reaching the open position against a stop slides and the coil spring during the further opening process through the lower half of the door leaf so that it Closing movement at the beginning of the closing to overcome the top dead center can help her relax.

As an alternative to this design, the two door leaf halves can also be connected in the area Hinges or an expansion spring can be provided in these. An embodiment Such a spreading spring has two arms standing at an acute angle, the rest against one half of the door leaf in the fold. This acute angle is when relaxing larger than the acute angle that the two door leaf halves in the closed position form. The spreading springs only come into effect in the last closing phase and stretch the door leaf halves apart in the sense of opening them. You come with it Beginning of the closing process, supporting it, to effect.

A further embodiment provides that in the area of the lower edge of the lower half of the door leaf several, e.g. B. eight tare weights for balancing the door leaf weight Regarding the counterweights are attached. These are expediently so attached that they are secured against loosening or falling. For example, you can with a center hole on the pin, which is screwable at the end or have lockable locking. To balance it is also possible additional weights, for example in the form of slotted ones, on the counterweights Provide discs to be pushed laterally over the rope to the counterweight become, which is mostly unreasonable for a layperson, especially if the balance weights not directly next to the gate opening, but for example in front of the back wall of the garage.

By removing two to three of the z. B. eight at the bottom of the lower half of the door leaf attached taring weights, the electrically operated gate can only be used open two fingers, even without motor power and it stays in the open position because the counterweights then move it slowly upwards when the gate lock by hand on the gate handle or with the gate key by moving the operating rod was released with the lock rod. Did all the buoyancy weights lead to one Obesity over the balance weights so that the gate into the Shooting position is pushed down, so the 'removal of some buoyancy weights Overweight of the counterweights results in the door leaf being pushed upwards becomes.

The great advantage of the new opening and closing mechanism with electrical extraction and removal Locking the door leaf is that except for a manually operated gate the attachment of the geared motor provided with at least one belt reel with only a few, e.g. B. four screws and one or two tension belts leading to the lower area the lower half of the door leaf slidable operating rod of the locking members no changes need to be made, except the stuck of several, e.g. eight buoyancy weights, see Fig. 1. This also applies if the Geared motor not on the upper half of the door leaf, but on the lintel to the side of the door opening (see Fig. 5 and 6) is attached. The electric drive is only on the side of the lintel attached when the fold-up door is mounted on the wall surface of the inside of the room and folds in the space above the lintel. One or two pull straps are optionally Bracket (e.g. suspension bracket) of the operating rod installed. The keeper basically also intended for manual operation only for gates, so that when upgrading later Electric drive except for the attachment of the motor and the attachment of the tension belt no work is required on the operating rod.

For the drive, a simple and energy-saving wiper motor can be used as a self-locking Gear motor can be provided to operate the tension belts. This is it is also possible to disconnect the door immediately in the event of a power failure and without Switch tools to manual mode only by removing a few buoyancy weights.

Only minimal forces occur, especially in the lowest closing phase. This reduces the Risk of accident if there are objects or children in the gate opening and the gate to be closed. Nevertheless, sensors can be provided on the lower edge of the door leaf be an automatic shutdown or reversing of the drive when touching an obstacle enable. The sensitivity of these sensors can, because of the initially very low forces, be high.

Fig. 1

eine Ansicht auf die Antriebsseite eines erfindungsgemäßen Hubfalttores, das außen auf die Außenwand des zu verschließenden Raums montiert ist und nach außen oben faltet und bei dem die Beschläge auf der Rauminnenseite vorgesehen sind;

Fig. 2 bis 4

Schnittansichten des Falttores nach Fig. 1 in der Schließstellung, in halb geöffneter Stellung und in der vollen Öffnungsstellung;

Fig. 5

eine Ansicht auf die Antriebsseite eines erfindungsgemäßen Hubfalttores, das innen auf die Außenwand des zu verschließenden Raums montiert ist und nach innen oben faltet und bei dem die Beschläge auf der Rauminnenseite vorgesehen sind;

Fig. 6

eine Querschnittansicht einer Halle oder PKW-Garage mit dem außen auf die Außenwand aufgesetzten Tor, das nach außen oben über den Torsturz faltet und bei dem die Ausgleichsgewichte vor der Garagenrückwand vorgesehen sind; und

Fig. 7

eine Querschnittansicht einer Halle oder PKW-Garage mit innen auf die Außenwand aufgesetztem Tor, das nach innen oben über den Torsturz faltet.

Exemplary embodiments of the invention are explained in more detail with reference to a drawing, in which:

Fig. 1

a view of the drive side of a lifting folding door according to the invention, which is mounted outside on the outer wall of the room to be closed and folds outwards and in which the fittings are provided on the inside of the room;

2 to 4

Sectional views of the folding door of Figure 1 in the closed position, in the half-open position and in the full open position.

Fig. 5

a view of the drive side of a lift folding door according to the invention, which is mounted on the inside of the outer wall of the room to be closed and folds inwards and in which the fittings are provided on the inside of the room;

Fig. 6

a cross-sectional view of a hall or car garage with the outside placed on the outer wall gate that folds out over the top of the lintel and in which the counterweights are provided in front of the back wall of the garage; and

Fig. 7

a cross-sectional view of a hall or car garage with the gate placed on the inside of the outside wall, which folds inwards over the lintel.

6 and 7 can be seen in a sectional view of a car garage 1 with an outer wall 2, on the outside 3, s. also Fig. 5, or on the inside 4, s. also 1 to 4, in front of a door opening 5 a foldable gate 6 with a door leaf 7 from an upper Door leaf half 8 and a lower door leaf half 9 and with a door frame 10 from one Lintel frame 11 and two side frames 12 is attached. This car garage is representative also for halls or sales shops with shop windows, which are also through a Load the lift gate or a lift (window) or close the lift grille.

As can be seen in particular from FIGS. 1 and 5, the upper door leaf half 8 and the bottom half of the door leaf 9 pretty much the same size. They are halfway up the gate leaf hingedly connected to one another by means of hinges 15. At the top of the top Door leaf half 8 further hinges 16 are provided, with which the upper door leaf half is hinged to the frame 11 of the lintel above the lintel 13 is attached to the outside of the garage to be locked.

The lower edge of the lower half of the door leaf 9 is by means of rollers 17 on the side there protruding axles are mounted in the area of the side door frames Guide rails 18 guided vertically.

On the lower half of the door leaf 9 there is a lock 20 known per se Below, short lock bar 21 into which a security cylinder 22 is inserted with which an actuating rod 24 connected to the lock rod against spring tension can be withdrawn from a lower position to an upper position. The actuating rod 24 is longitudinally displaceable by means of tabs 23 on the lower door leaf half 9 attached. Two schematically indicated also lead to the actuating rod 24 Bowden cables 28 for actuating laterally attached to the lower door leaf half 9 resiliently snapping locking members 29 that close to the hinges 15 laterally engage in the side frames 12 in order to open the gate in the closed position, e.g. B. by mechanical intervention.

A self-locking geared motor is used to open and close the lift folding gate 6 35. Car garages or shutters are preferably self-locking Windshield wiper geared motor for motor vehicles, which is close according to FIG. 1 the upper edge of the upper half of the door leaf 8, z. B. with four screws. For larger hall gates use larger motors. On the output shaft of the engine there is a belt reel 37, from which a tension belt 38 to close to the lower edge of the lower Door leaf half 9 is guided, where it on one of the actuating rod 24 laterally protruding mounting bracket 32 is attached. In this way the belt reel turns 37 at the pulse "open" to roll up the tension belt 38 or a steel cable. At the first approx. 30 - 40 mm of the rotation of the belt reel, the belt is rolled up by approx. 30 mm, whereby the operating rod 24 is raised by about 30 mm. By lifting this rod are simultaneously leading to the side locking members 29 Bowden cables 28 excited. The lock rod 21 of the lock has none immediately Locking function, but only an actuation function. The locking members 29 will unlocked left and right near the center of the side reveal of the gate opening. Then the gate begins to open by pulling the tension belt 38 onto the belt reel is rolled up, is pulled upwards, where the two door leaf halves 8 and 9 stop at an acute angle above the lintel by automatically switching off the motor, s. Fig. 3.

Balance weights 40 are to facilitate the opening and closing process provided on both sides of the door leaf behind, next to or in the side door frames 12, which hang on one or two pull cables 42 and are in the closed position of the gate are located near the lintel 13. The lower or free end of each traction cable 42 is at one Horizontal bolt 44 anchored near the lower edge of the lower door leaf half 9 is attached to this in their level, see. Fig. 1. From the horizontal bar 44 run, as shown in FIG. 1, two pull cables 42 first to a pulley 46, the is mounted on the lintel frame 11 above the gate opening in the area of the lintel 13, s. 1 and 3. Thus, each balance weight 40 in a manner known per se Opening force on the lower half of the door leaf 9 and thus on the upper half of the door leaf Exercise 8, the weight of which pulls the gate into the closed position as far as possible compensate. In this way, the gate, e.g. B. by hand, comparatively easy to open and close. First, the goal is counterbalanced 40 set so that the door leaf slowly upwards by itself after unlocking pull. Only by attaching additional buoyancy weights 50, e.g. B. at the bottom Edge of the door leaf, the door leaf is pushed into the closed position and remains in this position. So the buyer of a gate has the option of deciding whether to operate it manually remains and the electric drive later with a few screws at the top of the top Half of the door leaf 8. When operated by hand, e.g. B. after a power failure two to three of the buoyancy weights 50 removed, so that the door leaf is now up is pushed. The gate can then be opened and closed very easily with two fingers.

In the fully open position, the two counterweights 40 are completely together lowered, s. Fig. 4, and the two door leaf halves are folded against each other and form a very acute angle with each other at the central joint area, see also Fig. 4th By using a self-locking gear motor for the drive needs the energy supply to the drive motor only to be interrupted by the folded door leaf to hold securely in this position.

The counterweights 40 can also pass through the front garage wall to the rear wall the garage via the pulleys 46 and pulleys attached in front of the rear wall 47 guided ropes 42 can be attached, as shown in FIG. 6.

On both sides of the door leaf halves, a soft coil spring 55 of 10 to 20 mm in diameter is also provided, which is fastened at one end in the lower region of the side frame 12 and at the other, free end in a slide 58 in the upper region on the side frame 12 slides. The carriage 58 extends into the range of motion of the roller 17 of the lower half of the door leaf so that it can be carried along by it. The choice of fastening and attachment points and the length of the springs is such that the springs only exert a downward force on the lower edge of the lower half of the door leaf during the last movement phase, as can be seen from Table 1.

Table 1 shows those for a heavy and a light door leaf in the higher elevations 0.5 m, 1.0 m, 1.5 m, 2.0 m and 2.5 m required opening forces listed. It is with a heavy door leaf in the lower layers up to approximately 1.0 m, the opening force is round 2 kg, above 3 kg and finally 3.2 kg in the last opening phase. Are accordingly the required forces for a light door leaf up to about the middle position in each case 1 kg, above 2 kg and finally 2.5 kg. It can be seen that the coil springs 55 only begin to exert a closing force on the gate in the last movement phase. These additional soft coil springs have the advantage that the Lift folding gate (or the lifting window shutter) even in the case of winter icing with a longer opening sinks immediately and not jerkily to close. These coil springs offer a jump start, even if they only have a diameter of, for example 10 to 15 mm. After unlocking, when the two halves of the gate are up fold, these two coil springs, which act as tension springs, start at the earliest half gate height, e.g. B. with the sliding on the side frame, from the lower half of the door leaf pulled up and slightly tensioned. When lowering the door leaf these tension springs thus serve as a starting aid, especially in the event of frost and icing, but also with wind load.

With the detachably secured at the lower edge of the lower door leaf half 9 Tare weights 50 can both achieve a fine adjustment of the balance weights 40 as well as affect the action of the tension springs 55. Above all, they serve on site to determine whether the door for manual operation slowly slides up after unlocking or with an electric drive after the "close" signal slowly slides down and automatically locks.

The buoyancy weights can be designed differently. So they can take the form of Have metal weights made of cast iron or of bottles or cylinders. Leave it empty bottles, especially those made of plastic, which are used with e.g. Sand or Like. Be filled. The shape is not critical. The buoyancy weight must be in have their position releasably secured so that they do not get out of their way when you open the gate Bracket fall out.

Should the 24V windshield wiper geared motor 35 fail or should the power supply stay out of the lintel frame 11 or from a cable, not shown Lintel 13 occurs here, only the buoyancy weights 50 at the lower edge of the lower half of the door leaf 9 Reduce until the folding door automatically by a light finger push and slides up into the open position without a motor and stops there.

In the event of an emergency manual operation of the gate, the or each tension belt 38 is used for lifting and Lowering the fold-up door so that it doesn't hang around with two snap hooks hung approximately in the middle of the transverse division of the door leaf, which is not shown. At the the straps automatically unhook.

Switching on and off and a drive control that is also considered necessary of the gear motor 35 can be done in a known manner with known means. A Radio control can be provided.

The gate can be locked or unlocked from the outside using a key and turning the handle of the security lock. Will a closing pulse triggered by transmitter or by push button switch in a known manner, that decreases open folding door due to its own weight, possibly supported by the tension springs 55, but slowed down by the geared motor with locking gear, slowly downwards until snap the locking parts of the lateral locking members 29 into the side frames 12. at In the event of a power failure, these locking elements can also be locked with a key via the cylinder lock, the lock bar 21, the operating bar 24 and the Bowden cables 28 in unlock in a known manner like a front door and can open the foldable gate by hand become. Instead of the locking members 29, spring-loaded locking bars can about diversions, e.g. B. rocker arm, operated from the operating rod 24, be provided (not shown).

The lateral counterweights 40 are expedient for safety reasons each suspended on two pull ropes 42 so that the weight in the event of a rope breaking hanging sideways in the side frame and a loud, audible, alarming scratching sound generated until the damage is repaired.

In the embodiment according to FIGS. 5 and 7, the door leaf folds inwards upwards. The Fittings must be on the inside of the lower door leaf half 9 and the drive motor 35 be attached to the inside of the lintel 13 next to the side reveal of the gate opening 5. Balance weights 40 run on the inside next to the side door frames 12. They support Traction cables 42 run here in the side guide rails 18 to the side near the Bottom edge of the lower door leaf half 9 protruding axes of the rollers 17. To open and closing the gate is on the inside of the lintel 12 or the lintel frame 11 next to it the gate opening 5 attached drive motor 35 with a belt roller 37 on the output shaft attached. To actuate the actuating rod 24 and to pull up the lower one Door leaf half 9 is approximately horizontal, extending beyond one side of the door leaf extending rocker arm 25 mounted laterally to the actuating rod 24 in a bearing 26. The free end of the tension belt 38 of the belt reel engages at the projecting end of the rocker arm 37 on. The rocker arm 25 is with tabs 23, s. Fig. 5, held and on the operating rod 24 articulated with a pin 27.

For cold rooms or cold stores, one of the new fold-up doors can be on the outside and be mounted on the inside of the door opening, with the outer door overlapping the lintel folds and the inner gate folds on the inside of the lintel, causing very favorable insulation of the gate opening is achieved.

Claims (9)

Lift-folding door for garages and halls and the like, as well as a lifting shutter for shop windows and the like, with a door leaf consisting of two hinged door leaf halves of the same size, of which the upper half of the door leaf (8) at its upper edge above the lintel (13) a lintel frame (11) is pivotally mounted and of which the lower door leaf half (9) at its lower edge with laterally protruding rollers (17) in rails (18) to be attached to the outside of the door opening from a closed position in which the two door leaf halves in one Lying level, in an open position in which the two door leaf halves protrude against each other above the lintel folded approximately horizontally, can be moved vertically, with inside or outside the garage or the room, in particular next to the tracks (18), provided counterweights (40) for counterbalancing the opening and closing of the door leaf (7), each with at least one pull rope (42), which has an im Area of the upper swivel bearing attached rope pulley (46) is guided and engages in the lower edge of the lower door leaf half (9), allow opening and closing with little force, with at least one actuating rod (24) which is resiliently biased into the closed position and can be actuated by hand by means of a (security) lock (20) on the lower half of the door leaf, and with an electrical self-locking gear motor (35) attached in the area of the upper edge of the upper door leaf half (8) with at least one belt reel (37) onto which at least one tension belt (38) can be wound and unwound, the free end of which corresponds to that of the lock (20) actuated actuating rod (24) is operatively connected so that it is first withdrawn from its advanced position into its retracted position against spring preload, actuating actuating means (28) connected to it against a stop which is on the side of the lower door leaf half (9) unlock locking elements (29) which are in engagement with the door frame (10), and then pull up the lower half of the door leaf (9) against the upper half of the door leaf (8). Lift folding gate according to claim 1,
characterized in that the geared motor (35) is fastened in the central region of the upper edge of the upper half of the door leaf (8) and the tension belt (38) is guided directly to a fastening bracket (32) provided on the actuating rod (24) actuated by the lock (20) , Lift folding gate according to claim 1,
characterized in that the geared motor (35) is provided in the area of the lintel next to the door opening and the belt next to the door opening to the inside surface of the lower half of the door leaf (which extends from the actuating rod (24) actuated by the lock (20) beyond the side of the door leaf) ( 9) mounted rocker arm (25) is guided. Folding gate according to one of claims 1 to 3,
characterized in that the self-locking gear motor (35) is a self-locking wiper gear motor. Lift folding gate according to one of claims 1 to 4,
characterized in that, in order to avoid accidents, the door is closed by the gear lock of the geared motor with the door leaf weight reduced to 1 - 2 kg - and not by motor power. Folding gate according to one of claims 1 to 5,
characterized in that a soft coil spring (55) is provided on each side of the side door frame (12), one end of which is connected to the lower region of the side frame (12) and the other end of which is attached to a slide (58) which during the opening process, it slides on or in the side running rail (18) and is carried along by the lower half of the door leaf (9) or its roller (17) in the last phase of the opening process, thereby tensioning the coil spring (55) so that it closes the closing movement at the beginning of closing to help overcome top dead center. Lift folding gate, in particular according to one of claims 1 to 6,
characterized in that additional buoyancy weights (50) are detachably attached to the lower edge of the lower half of the door leaf. Folding gate according to one of claims 1 to 7,
characterized in that the counterweights (40) are arranged to be movable upwards and downwards within the side frames (12). Folding gate according to one of claims 1 to 7,
characterized in that the counterweights (40) in front of the rear wall of the space to be locked are arranged to be movable upwards and downwards.

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