DE29621044U1 - Door with tension spring - Google Patents

Description

Company Gummi-Stricker GmbH & Co. KG, An der Kleimannbrücke 4, 48157 Münster

"Door with tension spring"
5

The innovation relates to a door according to the preamble of claim 1.

Such doors are known, for example, from the food processing industry. The door leaves can be made of plastic. The spring arrangements used build up increasingly higher forces when the door is opened, so that the tendency to keep the door in its closed position is comparatively low. In the event of drafts or similar minor influences, the known doors can therefore

remain undesirably open.

Conversely, the spring force acting in the open position of the door often presents a problem, especially if the door is held open at the door leaf, for example by a

Hooks attached to the wall. In these cases, the door leaf must absorb the spring forces that push the door towards its closed position. This can lead to undesirable deformation of the door leaf, particularly if the door is left open for longer periods, so that the door cannot be held in its closed position.

does not close tightly in the desired manner.

A further disadvantage of the known doors is that the spring characteristics can change after long-term use, e.g. due to fatigue.

The innovation is based on the task of improving a generic door so that it can be easily adapted by the manufacturer to different spring characteristics required during operation and that

the retention of this spring characteristic is guaranteed over a long period of time.

This problem underlying the innovation is solved by a door having the features of claim 1.

In other words, the innovation proposes the use of a tension spring. This acts on the door leaf via a cam arrangement, so that an advantage is achieved by the fact that the manufacturer can design the cam arrangement at

The use of a tension spring makes it easy to arrange relatively long springs, so that the spring deflection when the door is opened is comparatively small. On the one hand, this enables an almost constant spring characteristic, which is

However, the guide rail can be influenced in the desired manner. Due to the low spring deflection, even over a long period of operation, this desired spring characteristic is maintained and the tension spring does not fatigue.

Advantageous embodiments of the innovation can be found in the subclaims.

An example of the innovation is shown in the drawings

tions are explained in more detail below.

Fig. 1 shows a schematic longitudinal section through the

aisle area of door leaf and door frame and the

Fig. 2 in an enlarged scale compared to Fig. 1 a

and 3 backdrop tubes in two different views.

In Fig. 1, 1 denotes a door leaf which is attached to a closer designated overall by 2. The closer 2 has a round, tubular housing 3 which

extends over almost the entire height of the door. The door leaf 1

can be pivoted together with the tubular housing 3 of the closer 2. The closer 2 is guided in a bearing 4 on the floor, whereby the bearing 4 is fixed in an angle profile 5, which is firmly screwed to the wall. 5

A holding block 6 is attached to the door frame above the closer 2. A holding rod 7 extends downwards from the holding block 6. The holding rod 7 is guided in two guide pieces 8 in the center of the tubular housing 3. The holding rod 7 carries a sliding block 9 which is designed as a sliding block 9 which is pivotable about a horizontal axis.

freely rotatable, otherwise stationary roller.

Opposite the stationary holding rod 7 and the sliding block 9, a holding tube 10 is arranged at the lower end of the closer 2 so that it can rotate together with the tubular housing 3. The holding tube 10 fixes the lower end of a tension spring 11, the upper end of which is connected by means of two parallel connecting rods 12 to a tube section 14, which is centrally positioned in the tube by means of two guide disks 15.

shaped housing 3.

The connecting rods 12 can be designed as threaded rods to enable a height-adjustable fixing of the upper end of the tension spring 11 and thus a

to enable adjustable preload of the tension spring 11.

The pipe section 14 has a recess 16, the edge of which forms a guide track 17 for the guide block 9.

In Fig. 1, the door is shown in its closed position. If the door is opened in relation to this closed position, the housing 3 and thus the spring 11 and the tube section 14 move together with the door leaf around the longitudinal axis of the closer 2 by rotating the closer 2 on the

Bearing 4. Due to this rotation and the corresponding course of the slide track 17, the pipe section 14 on the sliding block 9 is forced upwards so that the tension spring 11 is tensioned. The spring force built up in this way causes the door to close automatically so that the door leaf 1 is

The door is returned to its closed position. There is hardly any wear and tear, as the gate arrangement operates without any significant friction due to the freely rotating gate stone.

When turning by 90°, i.e. when the door is completely open, the sliding block 9 engages in a semi-circular contour of the sliding block track 17, whereby the sliding block 9 has previously overcome a catch 18. The door therefore remains automatically in its open position without the door leaf having to be held. The

The door leaf therefore does not absorb any holding forces from the open door, so that the door leaf does not deform even if the door is left open for a long time.

The course of the slide track 17 in the area of the notch 18 can

be selected so that the catch 18 is comparatively weak. A sudden opening of the door can therefore lead to the sliding block 9 stopping in its end position and the entire arrangement springing back so that the door closes automatically. This is advantageous, for example,

if the door is pushed open briefly during rough operation, but there is no intention to open the door for a longer period.

In contrast, by briefly stopping the door leaf in the open position, the sliding block

9 does not spring back from its end position by overcoming the catch 18 so that the door is held in its open position.

By using the tension spring 11 with its almost constant spring characteristics, it is achieved that even at low

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steering of the door leaf 1 from the closed position, a high restoring force of the spring 11 acts, so that unintentional
Damage to the door leaf and unintentional partial opening of the door are virtually impossible.

By rotating the bearing 4, which is provided with a hexagon, the spring tension can be increased or decreased at any time after the door has been installed, depending on operational requirements.

Claims (4)

HABBEL & HABBEL S &Ggr;:.^ ¹ .^:^^^:·:^ habbel PATENT ATTORNEYS '··* »IPU-JUQ. bWZ HABBEL EUROPEAN PATENT ATTORNEYS PO Box 3429 ♦ 48019 Münster DIPL.-QEOQR. PETER HABBEL TELEPHONE (0251) 535 780 ♦ FAX (0251) 531 996 OUR FILE: {please specify) S193/19317 Muenster, 03.12.1996 Company Gummi-Stricker GmbH & Co. KG,
At the Kleimannbrücke 4, 48157 Münster "Door with tension spring"
20 Protection claims: 1. Door with a door frame and a door leaf which can be moved between an open position of the door and a closed position. . is pivotable, and with a spring arrangement that moves the door leaf in the closed position and allows the door to be opened against the spring force, characterized in that the spring is designed as a tension spring (11) and that a link arrangement is connected between the door leaf (1) and the spring (11), which together with the door leaf (1) has movable elements and together with the door frame has fixed elements, whereby the movement of the movable elements relative to the fixed elements when the door is opened against the action of the tension spring (11). 2. Door according to claim 1, characterized in that the guide arrangement has a locking position which holds the door leaf (1) in the Open position holds. 3. Door according to claim 1 or 2, characterized in that the tension spring (11) is pivotably mounted together with the door leaf (1). 4. Door according to one of the preceding claims, characterized by a vertical housing (3) in which the tension spring (11) is arranged longitudinally and in which a round tube section (14) is arranged, which has in its wall a guide track (17) designed recess (16), wherein the slide track (17) is assigned a slide block (9) which is movably mounted along the slide track (17).