DE7426752U - Roller door with fall protection - Google Patents

Description

Fall protection for target gates

The invention relates to a fall protection device for roller doors with several spring-loaded locking bolts, which are secured by a electromagnetically actuated locking device are held under spring tension in the operating position, and with a tachometer that works together with the winding shaft of the roller shutter door, which, when a set Speed closes the circuit to the locking device and thus releases the locking pin.

In the case of roller shutters, which can consist of a closed armor formed from individual slats or a roll-up grille, fall protection must be provided in order to avoid accidents. It can happen, as experience has shown, that the drive connection between the Vfickelwelle of the roller door and the gear connected to it is loosened due to wear or material defects. This loosening of the drive connection can occur in a worm gear, for example, by

V, »3077

-Adr. ELPATENT

'pstscheckkonlo Munich 84510-809

1p.8 & 75

Deutsche Bonk AG Augsburg toilet no. 0834 192 uVink code 720 700 01

that the worm is worn and then the worm wheel connected to the winding shaft due to the weight of the roller shutter can rotate without braking. The drive connection takes place chain breakage can occur between the gearbox and the winding shaft.

In a known fall protection device of the type mentioned at the beginning, the aforementioned locking bolts are on the guide rails arranged. There are in each case the inside of the building facing U-legs of the U-shaped guide rails in In the longitudinal direction of the same, a plurality of locking bolts, which can be displaced perpendicularly to the legs of the guide rails, in the longitudinal direction the guide rails arranged at a distance from each other. Each of the locking pins is pulled up by a spring the guide rail is loaded and can enter the inside of the guide rail from the outside through a hole in the guide rail traverse through. Each locking pin is an electromagnetic one associated actuatable bolt, which holds the locking pin in the operating position when the spring is tensioned, d. H. in a position in which it does not intervene in the interior of the guide rail. A sprocket is arranged on the winding shaft, which drives a tachometer via a chain. This tachometer is used when opening and closing of the door is driven by the chain, but remains ineffective at the normal opening and closing speed of the door. Only when the normal opening and closing speed is exceeded, which occurs when the drive connection between the gear unit and the winding shaft is released, the tachometer is driven faster and then closes when a set speed is exceeded the circuit to the electromagnet of the locking device. The electromagnets pull the latch on and release the locking pins. The locking bolts enter through the holes in the guide rails. Since every-

however, the locking pins are arranged at different heights and all triggered at the same time, the drive connection but can fail at any height, only those below the bottom rail of the roller door can the locking pin located completely into the interior of the guide rails. The one above the end rail The locking pins located in the center meet the slats of the RoIltorpenzer open and damage them as the roller shutter continues to move down until it moves onto the next the locking bolt which has penetrated completely into the interior of the guide rail. Sas subsequent loosening of the partially with The locking bolts jammed in the slats and the repair of the damaged slats requires a considerable amount of work Expenditure of time. In addition, this well-known fall protection device is expensive to manufacture, because a Vda. Number of Locking bolts are required, each of which has an electromagnetically actuated locking device: must be assigned.

There are also known fall protection devices for roller doors that when the normal operating speed is significantly exceeded by a centrifugal force or Ruts decoupling trigger a pawl that engages in a ratchet wheel connected to the winding shaft »This causes the Winding shaft stopped. Due to the high weight of the roller door and its speed, however, there is a considerable increase in it radial distance from the axis of the Ui ~ .kelwelle acting inertia forces on, the first wheel from the winding shaft to the pawl and from this to the pawl and the resting part of the Roller shutter storage must be transferred. It can also be here Material breaks occur. In particular, however, the wall anchors that support the roller door mounting are strong exposed to jerky stress, so that they can loosen or have to be considerably oversized.

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In another known fall protection device, a special worm gear is provided. Except the normal one An auxiliary auger also engages the drive worm Worm wheel, the auxiliary worm being driven by the main worm via corresponding intermediate gears. the The auxiliary worm is, however, mounted to be displaceable in its axial direction by a limited amount, so that normally no force is transmitted from the auxiliary worm to the worm wheel. This is intended to wear down the auxiliary worm be prevented. If the main screw breaks, so ■ brakes the auxiliary worm by self-locking. That mentioned

: However, special gear is expensive to manufacture and a

} Subsequent installation is usually not possible.

The invention has the object of a fall protection \ for rolling gates of the type mentioned in the introduction which

simply in

j their structure, safe in their function and subsequently

j is buildable, whereby furthermore, when it becomes effective, a

'' Damage to the roller shutter or my storage is avoided.

This is achieved according to the invention in that on the roller door or in the vicinity of its lower end rail a locking pin is provided on both sides and that on the guide rails several in the longitudinal direction of the same in Spaced detents are provided, in which the locking bolts engage when they are released.

You new fall protection is initially opposite the one at the beginning The previously known fall protection mentioned above is cheaper to manufacture «Instead of a large number of locking bolts, namely only two locking pins with associated locking device are required. Ds these locking bolts on the roller shutter itself are arranged and when they take effect in the notches of

7426752 liOS.75

Engaging guide rails will damage the slats of the Holltorpanzer excluded. When the locking bolt engages in the notches, the locking mechanism is braked and the load of the roller door was taken up by the tail rail. Damage or loosening of the roller shutter bearings is therefore excluded. Thanks to the few parts that are made for the Fall protection are required, it is also functionally reliable, or its functional reliability can be made easier at any time Way can be checked without damaging the roller door. You only need the speed set on the tachometer, if exceeded, the locking pins should normally be triggered, set to the operating speed or below. If the door drive is now put into operation, the locking device must release the locking pins immediately.

There is a particularly advantageous and cost-saving design in that the locking bolts are arranged parallel to the tail rail so as to be displaceable in opposite directions. Here extend Advantageously, the locking bolt up to the middle of the Schlußschxene and there is a common locking device intended for both locking pins

Further refinements of the invention emerge from the other subclaims. .

The invention is explained in more detail below with reference to the embodiments shown in the drawing.

Show it:

Fig * 1 shows the inside of a door with the new fall protection in a first embodiment

Fig. 2 is a side view in the direction II of Fig. Λ

- 6 - ι

Fig. 3 is a partial interior view

Yy ¹ Xg. 4 shows a partial cross section along the line IV-IV in FIG. 3

Fig. ' 5 shows a partial longitudinal section through a second embodiment

6 shows a horizontal partial section through a third embodiment.

The roller door, designated as a whole by 1, consists in a known manner of individual slats that are articulated to one another

2 and a lower end rail 3. Used for winding the winding shaft 4-, which by the drive motor 5 and the intermediate gear 6 is driven. A disk 7 is arranged on the winding shaft, on its circumference Alternately differently polarized permanent magnets 8 and which interacts without contact with a tachometer 9. The tachometer 9 is designed in a known manner so that it is when an adjustable rotational speed is exceeded via a signal or directly via a switch. This switch is in the circuit of a roller door 1 arranged Eldtromagneten 10, which is used to operate a Locking device 11 is used. The speed at which the mentioned switch is closed by the tachometer is set so that it is slightly higher than the normal lifting and lowering speed of the door. The power supply too the electromagnet 10 takes place via a trailing cable 12.

On the lower end rail 3 of the roller door 1 there are two locking bolts 13 »1A- mounted so as to be displaceable in opposite directions, this locking pin parallel to the tail rail

3 are movable. The locking bolts extend to the middle of the tail rail. One acts on their inner ends

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«A. »Ill ** · ■

Compression spring 15 on · Each locking bolt 13, 14 has a transverse pin 16, 17 at its inner end, which cooperates with a bolt 18, 19 of the locking device 11. You two bolts 18, 19 are arranged on a common yoke 20 which can be raised and lowered by the electromagnet 10. The two locking bolts 13 and 14 are normally held by the locking device 11 in their operating position shown in FIG. 3, in which the compression spring 15 is tensioned and the free outer ends 13a, 14a of the locking bolts are out of engagement with the catches described below.

On the usual lateral U-shaped guide rails 21 are several spaced apart in the longitudinal direction of the rails Notches 22 are provided. In the embodiment shown, these consist of on the outside of the inside U-leg 21a welded elbows 22.

The effectiveness of the fall protection system described so far is as follows:

If the drive connection between the gear 6 and the rocker shaft 4 loosens in an undesired manner, the winding shaft rotates with increasing speed due to the weight of the roller door. If the speed of the winding shaft exceeds a certain speed set on the tachometer 9, which is higher than the normal operating speed for lifting and lowering, the circuit to the electromagnet 10 is closed. This attracts and. the seals 18, 19 release the cross pins 16, 17. Due to the tension of the compression spring, the locking pins 13, 14 are pressed into their locking position in the area of the angle pieces 22, like la Pig. 3 is shown in phantom. With further downward movement of the gate, the free find 13a, 14a come to the next Wiakel-

742S752

pieces 22 to the plant and the downward movement of the gate comes to a standstill. After the damage to the door drive has been repaired, the locking bolts can counter the tension the spring 15 is returned to its operating position and are held in this position by the locking device 11. The fall protection function can be set in can easily be checked by the fact that the speed set on the tachometer is exceeded when it is exceeded the locking device is to be released is set to the operating speed or below. When the

Door drive, the locking bolts 3oföl ^f J must then be released.

In the embodiment shown in Fig. 5 are

H the locking bolts 14'yäer hollow tail rail 3 '

§ arranged to be movable. As notches are in the web 21b of

H U-shaped guide rail 21 'several in the longitudinal direction of the

f guide rail arranged recesses 23 provided, the

|: serve as rests. B & i release the locking pin 11 · grab

the free ends of the same into one of the recesses 23.

ρ In this way, the fall protection is largely invisible.

ί oar arranged in the tail rail 3 'and there are bdm

ι Fall protection becomes effective, tipping moments from fall | ^!

h _: tail rail 3 'kept away. yy

I I;

. In another exemplary embodiment shown in Figure 6 \ play on both sides two j extending at the end rail 3 ¹¹ parallel to the end rail, a respective leg; the guide rail 21 ″ comprehensive arms 24 are provided. On 3ed8m of these arms there is arranged a locking bolt 14 ″ which can be ^{displaced perpendicularly to the end rail 3 ′ 1 by spring force 25.}

The locking pin is actuated electromagnetically

, bare locking device 11 '' is normally held in the operating position and when the drive connection is released between

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see winding shaft and gear released in the manner described above. In the one arranged between the shunt bar 3 ¹ 'and the arm 24 · U-legs are provided notches in the form of recesses 26' which instead of these recesses also welded parts may be present. However, this version has the disadvantage compared to the embodiment described first that the locking bolts extend perpendicular to the end rail 3 ″ and thus not inevitably protrude over the end rail. In addition, two separate locking devices are required and it is not always guaranteed that these actually trigger the locking bolts at the same time.

Claims (8)

Expectations 1. Fall protection for Holltore with several spring-loaded locking bolts, which are held in the operating position by an electromagnetically actuated locking device under spring tension, and with a tachometer that works with the winding shaft of the roller door, which closes the circuit to the locking device and thus the locking bolt when a set speed is exceeded releases, characterized in that a locking bolt (13, 14, 14 ', 14'') is provided on each side of the roller door (1) on or near its lower end slide (3, 3 ¹ »3 ^{11) and} that on the guide rails (21, 21 ', 21' ·) a plurality of notches (22, 23) 26) arranged at a distance in the longitudinal direction thereof are provided, in which the locking pins (13, 14, 14 ', 14'') at their ;. Snap release into place 2. Fall protection according to claim 1, characterized in that the plywood (13 »14, 14 ') is parallel are arranged to be displaceable in opposite directions to the tail rail (Fig. 1-5). 3. Fall protection according to claim 2, characterized in that the locking bolts (13, 14, 14 ') extend to the middle of the tail rail (3, >> ') and there a common locking device (11) is provided for both locking bolts (Fig. 2, 3) - 11 - 4 ·. Safety arrangement according to claim 3, characterized geke η η * · characterized in that the locking device (11) comprises a means of an electromagnet (10) perpendicular to the Move and he ichtung the locking bolt (13 "14-, 14- ') movable yoke (20) which has a bolt (18, 19) on each side for a transverse pin (16, 17) or the like provided on each locking bolt (13, 14-, 14- '). 5. Fall protection according to claim 1 and 2, characterized in that the rabbits from on the Outside of one U-leg (21a) is U-shaped There are guide rail (21) welded elbows (22) (Fig. 3, 4-). 6. Fall protection according to claim 1 and 2, characterized in that the locking bolts (1A- ¹ ) in the hollow end rail (3 ¹ ) are slidably arranged and in the web (21b) of the U-shaped guide rail (21 ') ala several notches Recesses (23) are seen (Fig. 5) 7 · Fall protection according to claim 1, characterized in that on both sides of the end rail (3 '') there are two cornered U-legs of the guide rail (2'i ¹¹ ) parallel to the end rail. comprehensive ]: Arms (24) are provided, on each of which one perpendicular to ι End rail displaceable locking bolt (14 '') arranged ι is, wherein the catches (26) on or in the U-leg encompassed ] are provided (Fig. 6). ] 8. Fall protection according to claim 1, characterized in that g e k e η η - ^; records that on the winding shaft (4) with a the rev counter (9) cooperating disc (7) in front of |; can be seen, which are alternately different in their circumference & pole permanent magnets (8). - 12 -