EP0816624B1 - Quick moving door for cold-storage buildings - Google Patents

Description

The invention relates to a roller door with a flexible door leaf, preferably for closing Building openings in cold stores, with the door leaf rotatable to one above the building opening mounted take-up roller is wound up and is guided laterally in guides, wherein the Guides are formed heated by hot air and a hot air heater is provided.

A roller door is for example from the German Patent DE 3735850 known. This Roller door has a flexible door leaf. adversely At this roller door is the low isolation effect of the door leaf. Such a door leaf prevents only the air exchange. The isolation effect is negligible.

To seal the door leaf opposite the building Brush bands are provided at the edges. The Brush straps are on both sides of the door leaf provided so that the pressing force of the brush belts cancel each other out.

When used at building openings of cold stores leads the remaining air exchange through the Brush belts for malfunction of the roller shutter. Due to condensate, which attaches itself to the bristles of the Forms brush bands, it comes to freeze the Door leaf.

A better insulation effect show rolling shutters, such as For example, from the German Publication DE 4438769 are known. by virtue of the additionally provided second track they have a much better insulation effect. But even at these gates ices the leadership, if one Such gate for closing a building opening in Cold stores serves.

The US 5,203,175 is also a heater for a Gate device on. However, this is outside the Even in a parallel plane to the gates closed gate on the vertical edge sides appropriate. The proposed heater has nozzles on, in the plane and on the lower edge of the Tores are directed. The exiting from these However, warm air does not reach the middle of the Tor bottom still leads to an effective and Cost-saving heating of the gate itself. This too Approach can not be a reliable closure of refrigerated warehouses.

US 4,776,379 a roller door according to the preamble of claim 1 with a device for heating from gateways. In this, however, will be only the guides heated, a heater the gate itself and especially its lower edge remain under. This has the consequence that at the Bottom edge of ice forms the operational safety of the Restricts gates.

The object of the invention is therefore to provide a roller door for To provide that for reliable Closing of building openings in cold stores suitable is.

This object is achieved in the generic subject matter solved in that the hot air heating a Air duct with at least one outlet opening in lower area between webs of the door leaf in has closed state.

The fact that the hot air heating with an air duct at least one entrance opening in the lower area between webs of the Torblatt in the closed Condition, becomes a convection flow supported between the tracks, so that the warm air particularly favorable all sensitive areas can reach. Because the warm air naturally the The tendency is to go up, the whole Heated door surface. The heating of the goal area itself leads with great advantage that automatically all Investment surfaces of the entire door leaf to be heated and thus also the surfaces of the guides kept at a temperature above freezing. Forming condensate remains liquid. ice cream can not form. Thus, cold stores can be securely closed at all times.

The object is in the generic subject also solved by the seals as aprons are formed, which at an acute angle against the door leaf are formed applying. Of the Sealing gap is in this way on the surface of the door leaf. The apron has one Length of about one hundred to 150 mm. As a result of that the apron lies flat against the door leaf, improves the effect of the seal surprisingly to an extent that it hardly still comes to condensation. If the seal is arranged on both sides of the door leaf, It also works in both directions. It seals especially each apron, which is on the side on which a higher pressure acts than on the other side.

The sealing effect can be improved even if several overlapping aprons are provided.

It is envisaged that the closer to the door leaf arranged apron shorter than the covering them Apron is formed.

In practice, it has proven to be the most reliable if provided for heating a hot air heating is.

The guides stay especially dry when the hot air heating a suction on the has colder side of the door leaf. By Heating the colder air is reduced their relative humidity, so that condensation is avoided with certainty.

It is also envisaged that the roller door a Exhaust opening on the warmer side of the door leaf has, so that the cold losses are reduced. The same purpose serves the measure that the roller door a three-sided housing, preferably made an upper and two lateral Isopaneelen consisting, wherein between the upper side of the housing and a warmer side take-up roller a seal, preferably an apron provided is.

The operational safety is in another Improved configuration in that the lower Edge of the gate is formed heated. A Such heating can for example in the form of a electrical resistance heating can be provided. This also applies to the heating of the guides.

Because the warm air heating air ducts has, which are arranged parallel to the guide, results in a particularly favorable constructive Layout.

As a further advantageous embodiment provided that the gate at least one, preferably between the tracks of the Torblatt arranged, prop having. Such a support takes the wind load of the flexible door leaf. For example, the Support be taken by a beam that the forms lower edge of the door leaf. When closing the Tores sits down parallel to the lower beam arranged support on side buffers, the are provided approximately at half the gate height. Will the gate open, so the lower banks take the same Laterally guided support again with upward.

Major damage to the gate and to vehicles can be avoided if the goal yielding Guiding elements, which the gate at lateral impact released. To this end can be in the lower crossbeam lateral resilient Guiding elements to be provided at Passing a force give way.

The same purpose serves the measure that the gate at lateral impact self-acting off is trained. Such a shutdown can thereby be achieved that at the lower crossbar one for Side directed contact strip is provided at whose operation is a signal for switching off the Torantriebes is passed to the controller.

The process task is solved by the Guides are heated by the air chamber between two lanes of a gate in the area of Guides (10) by means of aprons (18, 19) and in Area of the rolling rolls (6, 7) through apron (30) be sealed so that an overpressure set becomes. This can cause operational malfunctions Ice formation can be advantageously avoided.

It is particularly reliable when the heater with heated air takes place.

The operating costs for the heating will be advantageous held low when between two lanes of the Torblatts an overpressure is set. Because the room between two tracks of the door leaf to the outside is sealed, resulting in an advantageous lower Air consumption.

The air is especially dry for heating when the Heating air is sucked in on the cooler side.

The fact that the seal between the building opening and Torblatt by itself at an acute angle to the door leaf putting on aprons, one results particularly good sealing of the cold store.

The heating air reaches all endangered areas, if the heated air in the lower area between two Lanes of a door leaf with the gate closed is initiated.

In addition, it is provided that the heating air on the warmer side of the gate emerges.

The invention is in a preferred Embodiment with reference to a drawing described, with further advantageous details the figures of the drawing can be seen. Functionally identical parts are the same Provided with reference numerals.

Figur 1:

eine Ansicht des erfindungsgemäßen Tores in einer Gebäudeöffnung mit entfernter Verkleidung;

Figur 2:

einen schematischen Schnitt durch das Tor gemäß Figur 1, Schnittlinie II-II;

Figur 3:

einen Schnitt durch das erfindungsgemäße Tor gemäß Schnittlinie III-III in Figur 2;

Figur 4:

ein vergrößertes Detail der seitlichen Dichtung gemäß Markierung IV in Figur 3;

Figur 5:

die Dichtungssituation bei geöffnetem Tor schematisiert wie in Figur 4 und

Figur 6:

die isometrische Darstellung des erfindungsgemäßen Tores.

The figures show in detail:

FIG. 1:

a view of the gate according to the invention in a building opening with the panel removed;

FIG. 2:

a schematic section through the gate of Figure 1, section line II-II;

FIG. 3:

a section through the gate according to the invention according to section line III-III in Figure 2;

FIG. 4:

an enlarged detail of the side seal according to marking IV in Figure 3;

FIG. 5:

the sealing situation with the door open schematized as in Figure 4 and

FIG. 6:

the isometric view of the gate according to the invention.

In Figure 1, 1 designates the roller door with his flexible door leaf 2, which closes the Building opening of a cold store is used. The gate leaf consists of two tracks 4, 5 on two above the building opening arranged take-up rollers 6, 7th are attached to them on the take-up rollers 6, 7 wind. The lower end edges of the webs 4, 5 are on a vertically movable crossbeam. 8 attached, the one axially at its ends against spring pressure movable lateral pin. 9 having. These bolts engage in a vertical Guide 10 and thus lead the cross bolt 8 in vertical direction. In that regard, the roller door corresponds other known roller doors with a double-walled Door leaf. The drive of the take-up rollers is only shown schematically, since he is not the subject of Invention is.

For use in cold storage is according to the invention provided a heating of the guides. Serves for this purpose in the example shown, a hot air heating. she consists of a blower 12 with electrical Heating 13 and a horizontally guided Hot air distribution line 14, which in lateral parallel to the guide rail guided tubular Air ducts 15 opens. The suction port 16 is located on the colder side of the building opening 3. The Blower 12 sucks through suction 16, the cold Air on, when flowing through the heater 13th it is heated and by means of hot air distribution pipe 14 right and left to the side of the building opening guided. The air ducts 15 lead them into the bottom of the gate, where it passes through an opening in the U-shaped profile of the side guides entry. The air leaves the guide at an angle down in the direction of arrows 17. This will kick them with the door closed between the two tracks 4 and 5 off. The warm air flows between the tracks to the middle and to the top, where they are between the Winding rollers 6 and 7 emerges. This will be the Guided tours as well as the gap constantly heated. Above, the air flows through the gap between the two take-up rollers 6 and 7 therethrough. Between Upper Isopanel 27 and the one to the warm side located winding roller 7 is a seal of the Isopaneel 27 drooping apron 30 is provided, the flat on the take-up roller 7 rests. This can the air according to arrow 31 only over the front Winding roller 6 through the exhaust port 29 after flow outside to the warmer side.

FIG. 4 shows the situation in enlarged form Presentation. In addition, there are two side aprons 18 and 19 provided as seals. The aprons 18 and 19 lie flat against lanes 4 and 5, so that a very good seal is created after works on both sides. Once on one side of the gate a higher pressure than on the other side, put that apron stronger against the web on, which is located on the side of higher pressure is. In addition, the side apron is multi-layered built up. In this case, there is the lateral Apron in two layers 20, 21. The inner apron 20 is shorter than the skirt 21 executed. Thereby arise two sealing edges that the sealing effect still increase. The making of these aprons is easy as they are made from a single piece leaves, by the apron around a Kehder 22 deflected becomes. This Kehder finds in a groove 23 one Angle profile 24 its inclusion, so that he is in it is held. The lateral legs 25 of the Angles 24 have an angle to the base 26 about 60 degrees.

In Figure 5, the state with the door open shown. In the open area of the gate Close the side aprons due to their Restoring force. This will be an approximate isosceles profile formed in which the Warm air is directed upwards until it enters the Area of the lower crossbar 8 passes and above the crossbar 8 again between the tracks 4 and 5 can occur.

Bounces a vehicle against the door when the gates are closed Crossbar, so the spring-loaded bolts are 9 against unillustrated springs inside in the Pressed body 8, so that the crossbar from the Leadership exit. This will cause major damage avoided. At the same time by means of a provided safety edge of the electric drive off.

The gate according to the invention has for high-speed doors maximum insulation. Nevertheless, you can shortest opening and closing times are achieved because the condensation and consequently the Icing is avoided safely. It turns out reliable operation of the roller door.

In Figure 6, which shows the gate in perspective, In addition, the location of the controller 32, the Limit switch 33 and the motor 34 for winding the Lanes 4 and 5 are detected. The power loss the controller 32 with its inverter and the Motors is for preheating the fan 12 through Intake port 16 sucked air used, because the All mentioned above parts in a common box are arranged. Because the electrical parts are tight lie together, also reduces the Cabling effort as far as possible. To the electric Installation of the gate only requires the insertion a plug.

Particularly advantageous is a double-walled curtain of approximately 1.4 mm thickness with a gap of 60 to 120 mm has been found. The side aprons have a length of 50 to 150 mm inside and 150 to 200 mm outside. Here, a rubber profile of 2 to 3 mm thickness with fabric insert has proven particularly useful. In addition, the operating costs can be reduced if the door is closed on three sides. Isopanel of about 40 to 50 mm thickness with aluminum surface is particularly recommended for this purpose. For the heating of a standard building opening has a heating system of about 1.4 kW power. For heating, the radial fan of the fan has an output of approximately 320 m ³ per hour of air throughput. This is sufficient to allow even with the door open, preferably in the area of the bottom between the aprons still allow a slight flow of air in the bottom area and thus prevent the icing of the soil. Preferably, however, the lower crossbar is provided with outlet openings for hot air, so that at a slight pressure between the tracks and some warm air in the region of the lower crossbar can escape down. It is advantageous if the lower crossbar is designed as a hollow profile, so that the emerging in the lower region of the guide hot air can enter to a significant extent directly into the opening of the hollow profile.

In the inventive way is a High-speed roll-up door for deep-freeze warehouses especially function safe to operate. Disturbances as a result of Ice formation no longer occurs.

LIST OF REFERENCE NUMBERS

1

rolling gate

2

door leaf

3

building opening

4

train

5

train

6

winding roll

7

winding roll

8th

crossbeam

9

bolt

10

guide

11

Warm air heating

12

fan

13

electric heating

14

Warm air distribution line

15

air duct

16

suction

17

arrow

18

side apron

19

side apron

20

documents

21

documents

22

Kehder

23

groove

24

angle section

25

leg

26

Base

27

upper isopanel

28

lateral isopanel

29

exhaust vent

30

apron

31

arrow

32

control

33

limit switch

34

engine

Claims (8)

1. A roll-up door with at least one flexible door panel (2), preferably for closing building entrances in refrigeration houses, wherein the door panel (2) may be wound up onto a wind-up roller (6, 7) rotatably mounted above the building entrance (3), and is guided laterally in guides (10), wherein the guides (10) are designed heatable by way of warm air and there is provided a warm air heating (11), characterised in that the warm air heating (11) comprises a blower (12) with a heating means (13), which is arranged in the upper region of the door (1), wherein the warm air heating (11) comprises an air guide (15) with at least one exit opening in the lower region between two sheets (4, 5) of the door panel (2) in the closed condition.
2. A roll-up door (1) according to claim 1, characterised in that the door comprises lateral seals which are designed as multilayer skirts (18, 19) which are formed bearing against the door panel (2) at an acute angle, wherein the skirt (19) arranged closer to the door panel (2) is formed shorter than the skirt (18) covering it.
3. A roll-up door according to one or more of the preceding claims, characterised in that the warm air heating (11) comprises a suction opening (16) on the colder side of the door panel (2) and preferably a discharge air opening (29) on the warmer side of the door panel.
4. A roll-up door according to one or more of the preceding claims, characterised in that the roll-up door comprises a three-sided housing (27, 28), preferably consisting of an upper and two lateral insulation panels, wherein between the upper housing side and a wind-up roller (7) situated to the warmer side there is provided a seal, preferably a skirt (30).
5. A roll-up door according to one or more of the preceding claims, characterised in that the lower edge of the door is formed heatable, preferably in that the lower edge of the door comprises openings for the exit of heated air.
6. A roll-up door according to one or more of the preceding claims, characterised in that the door comprises yielding guide elements (9) which release the door with a lateral impact and preferably the door is formed to switch off automatically with a lateral impact.
7. A method for operating a roll-up door according to one of the claims 1 to 6, characterised in that the guides (10) are heated with warmed air in that the air chamber between two sheets of a door panel in the region of the guides (10) are sealed by way of skirts (18, 19) and in the region of the wind-up rollers (6, 7) by way of a skirt (30) so that an excess pressure is set.
8. A method for operating a roll-up door according to claim 3, characterised in that the heating air is suctioned on the cooler side and exits at the warmer side of the door.

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