EP0747557B1 - Door hinge - Google Patents

Description

The invention relates to a door hinge which is intended in particular for cold room doors one frame bracket to be attached to the door frame and one to the door fastening door frame, which is rotatably connected to one another by a hinge axis are, one on the hinge axis held non-rotatably on the hinge frame Storage area is arranged on which there is a support surface arranged on the door frame supports, and the hinge axis as with a threaded section and contact surfaces for a hand tool provided screw is formed, which is adjustable in height with the threaded portion cooperating thread of the frame bracket and at the projection of the door frame rotatable on the middle section of the hinge axis is mounted between an upper and a lower projection of the frame bracket.

Such door hinges are known from US-A-2 302 484. In this well-known A door hinge is formed for the height adjustment, which in one The height of the projection of the frame bracket can be screwed in. In addition to this, the Screw a thread on the free end for a lock nut. Using this with two threaded sections with different diameters As a hinge axis, it is very expensive to manufacture because it is this threaded rod is a special component manufactured for this door hinge. In addition to the Using this special component it is necessary with the known hinge an additional roller bearing ring between the frame bracket and the door bracket to arrange, reducing the manufacturing and maintenance costs for this known Door hinge can be increased significantly.

In particular because of the high door weight of cold room doors, it is inevitable that the door will lower after prolonged use, so that the door hinges must be readjusted if premature wear of the lower seals is to be avoided. The invention is therefore based on the object of further developing a door hinge of the type described above in such a way that simple adjustment of the height of the door frame relative to the frame frame is possible.

The solution to this problem by the invention is characterized in that the screw forming the hinge axis with its threaded portion, which is formed at a free end remote from the screw head, is screwed into said thread on the upper projection of the frame bracket and secured in position by means of a lock nut, and that the support bearing rests on the upward-facing underside of the screw head, is held non-rotatably in the lower projection of the frame bracket and is provided with a sloping bearing surface on which the bearing, which is held non-rotatably in the projection of the door bracket, rests with a correspondingly sloping bearing surface.

This configuration according to the invention makes it possible to easily open the door adjust in height, for which it is only necessary to hand tools to the Apply attack surfaces of the hinge axis and twist them, so that on the support bearing held on the hinge axis is adjusted in height. Because of this at the same time the support lying on the upper bearing surface of the support bearing in the Height is adjusted, a very sensitive results in a particularly simple manner Readjust the door without the door bracket being attached to the door or the Frame bracket on the frame must be solved. In this way one can particularly good sealing of the lower edge of the door against the frame in the reach the closed position. The one with the screw head facing down Screw is not only a commercially available and therefore inexpensive component for education the hinge axis, but also serves in a particularly simple manner Support bearing support.

According to a further feature of the invention, the support bearing is by positive locking held against rotation relative to the frame bracket, preferably by means of a the mantle of the support bearing formed polygonal surface, which in a corresponding recess of the frame bracket or door bracket engages.

To provide a particularly simple anti-twist device for the hinge axis create, is further proposed with the invention, the screw head the screw serving as the hinge axis by a on the frame bracket or to keep the door frame cap against twisting. This cap is according to the invention with a recess corresponding to the screw head provided so that the hinge axis forming after the cap Screw reliably against twisting on the frame bracket or door bracket is held.

To prevent unauthorized opening of the closed door by tampering with Preventing door hinge is according to another feature of the invention the cap by means of a fastening screw covered when the door is closed secured against losing weight.

Finally, the invention proposes on the threaded portion to place a lock nut on the screw; with the help of this lock nut it is possible to also adjust the height adjustable hinge axis of the invention during adjustment work with the cap not yet attached to prevent twisting to back up.

Fig. 1

einen senkrechten Schnitt durch ein Türscharnier,

Fig. 2

einen waagerechten Schnitt durch das Türscharnier gemäß der Schnittlinie II - II in Fig. 1, wobei der Vollständigkeit wegen Teile des Rahmens bzw. der Tür angedeutet sind;

Fig. 3

eine Seitenansicht einer unteren Kappe,

Fig. 4

eine Draufsicht auf die Kappe nach Fig. 3 und

Fig. 5

eine Seitenansicht einer oberen Kappe.

An exemplary embodiment of the door hinge according to the invention is shown in the drawing, namely:

Fig. 1

a vertical section through a door hinge,

Fig. 2

a horizontal section through the door hinge according to the section line II - II in Figure 1, the completeness because of parts of the frame or the door are indicated;

Fig. 3

a side view of a lower cap,

Fig. 4

a plan view of the cap of FIG. 3 and

Fig. 5

a side view of an upper cap.

The door hinge shown using a preferred embodiment comprises a frame bracket 1 to be screwed to a frame R. a door bracket 2 to be arranged on a door T, through a hinge axis 3 are rotatably connected to each other. In the embodiment, the Hinge axis 3 non-rotatably between two projections 1a and 1b of the Frame bracket 1 arranged. There is a ledge on its middle section 2a of the door frame 2 rotatably mounted.

Both the frame bracket 1 and the door bracket 2 is both on the upper also at the lower end by means of two, not shown in the drawing Screws screwed onto frame R or door T. To this Purpose are frame bracket 1 and door bracket 2 at the upper and lower ends, respectively provided with an elongated hole 1c or 2b. In these elongated holes 1c or 2b screw-on plates 4 are used, which can be seen in section in FIG. 2 are. These are each designed to accommodate two fastening screws Screw-on plates 4 are serrated on their underside and act with one corresponding teeth in the area of the elongated holes 1c and 2b together, so that a sensitive adjustment of both the frame bracket 1 on the frame R as well as the door frame 2 on the door T is possible.

The hinge axis connecting the door bracket 2 rotatably to the frame bracket 1 3 is a screw with one that forms the actual hinge axis 3 Screw shaft 3a, a screw head 3b and a threaded section 3c executed. The screw is from below in a in the upper projection 1a of the frame bracket 1 screwed 1d screwed. To secure the position a lock nut 3d is provided for the screw.

The upward-facing underside of the screw head 3b is supported a support bearing 5, preferably made of wear-resistant plastic from which is formed with an inclined bearing surface 5a. On this bearing surface 5a is a correspondingly inclined bearing surface 6a of a support 6, which is non-rotatable in the projection 2a of the door frame 2 is arranged. The support bearing 5 is non-rotatable in the projection 1b of the frame bracket 1 held. In the exemplary embodiment this non-rotatable bracket by forming polygonal surfaces on the Shell surface of the support bearing 5 or support 6, each in accordance intervene shaped multi-edge recesses of the projection 1b or 2a.

Due to the oblique course of both the bearing surface 5a of the non-rotatable on the frame bracket 1 support bearing 5 and the bearing surface 6a of the support 6 held non-rotatably on the door frame 2, the door T is raised, when moving from the closed position shown in Fig. 1 in the direction its open position is pivoted. This ensures that the Door in the closed position with its lower edge lowered into a position in which the seals interacting with the lower edge of the door work reliably.

In order to correctly set the altitude when installing door T for the first time achieve and adjust the height of the door when it is in use for a long time to be able to, it is only necessary after loosening the lock nut 3d to twist the screw forming the hinge axis 3 by a suitable one Wrench is attached to the screw head 3b. By this twisting of the screw shifts non-rotatably in the projection 1b of the frame bracket 1 held support bearing 5 in height. At the same time which is supported on the support bearing 5 via the support 6 and the door frame 2 Door T adjusted in height. It is therefore particularly simple Possible way to make an adjustment or readjustment of the T in height.

Around the screw forming the hinge axis 3 in the respectively selected position to hold independently of the lock nut 3d, a cap 7 used, which is shown in Figs. 3 and 4. This preferably from Plastic-made cap has a hexagon recess 7a, the Dimensions of the screw head 3b corresponds. Once the cap 7 is put on is, it positively prevents twisting of the Screw. As can be seen in FIG. 3, the cap 7 is fastened by a fastening screw 7b attached to the projection 1b of the frame bracket 1, for what the cap 7 with a fastening screw 7b Extension 7c is provided. This extension 7c and thus the fastening screw 7b are covered with the door T closed, so that the cap 7 at closed door T can not be removed. That way prevents tampering with the hinge axis 3 forming Screw opening a closed door T is possible.

Also the upper end of the screw formed by the threaded section 3c is covered in the embodiment by a cap 8 which with a Extension 8c is provided for receiving a fastening screw 8b.

Reference symbol list:

R

frame

T

door

1

Frame bracket

1a

head Start

1b

head Start

1c

Long hole

1d

thread

2nd

Door frame

2a

head Start

2 B

Long hole

3rd

Hinge axis

3a

Screw shaft

3b

Screw head

3c

Thread section

3d

Lock nut

4th

Top plate

5

Support bearing

5a

storage area

6

In stock

6a

Bearing surface

7

cap

7a

Hexagon recess

7b

Fastening screw

7c

Continuation

8th

cap

8b

Fastening screw

8c

Continuation

Claims (7)

1. Door hinge, in particular for cold-store doors, having a frame block (1) which is to be fastened on the door frame (R), and having a door block (2) which is to be fastened on the door (T), said blocks being connected rotatably to one another by a hinge pin (3), it being the case that arranged on the hinge pin (3), which is retained in a non-rotatable manner on the frame block (1), is a bearing surface (5a) on which there is supported an abutment surface (6a) arranged on the door block (2), and the hinge pin (3) is designed as a screw which is provided with a threaded section (3c) and attachment surfaces for a hand tool and is retained in a vertically adjustable manner in a thread (1d) of the frame block (1), said thread interacting with the threaded section (3c), and a protrusion (2a) of the door block (2) is mounted rotatably on the central section of the hinge pin (3), between a top and a bottom protrusion (1a, 1b) of the frame block (1), characterized in that the screw forming the hinge pin (3) is screwed by way of its threaded section (3c), which is formed at a free end, remote from the screw head (3b), into said thread (1d) on the top protrusion (1a), of the frame block (1) and is secured in position by a lock nut (3d), and in that the supporting bearing (5) rests on the upwardly oriented underside of the screw head (3b), is retained non-rotatably in the bottom protrusion (1b) of the frame block (1) and is provided with said bearing surface (5a), which runs obliquely and on which the abutment (6), which is retained non-rotatably in the protrusion (2a) of the door block (2), rests by way of the correspondingly obliquely designed abutment surface (6a).
2. Door hinge according to Claim 1, characterized in that the supporting bearing (5) is retained by a form fit against rotation in relation to the frame block (1) and/or door block (2).
3. Door hinge according to Claim 2, characterized in that the supporting bearing (5) is secured against rotation by means of a polygonal surface formed on its lateral surface.
4. Door hinge according to at least one of Claims 1 to 3, characterized in that the screw head (3b) of the screw serving as hinge pin (3) is retained against rotation by a cap (7) which can be positioned on the frame block (1) and/or door block (2).
5. Door hinge according to Claim 4, characterized in that the cap (7) is provided with a cutout (7a) corresponding to the screw head (3b).
6. Door hinge according to Claim 4 or 5, characterized in that the cap (8) is secured against removal by means of a fastening screw (7b) which is covered when the door (T) is closed.
7. Door hinge according to at least one of Claims 1 to 6, characterized in that a lock nut (3d) is arranged on the threaded section (3c) of the screw.

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