EP4303389A1 - Concealed door hinge - Google Patents

Abstract

Concealed door hinge for pivotably holding a door leaf on a door frame, with a multi-axis joint (2) having articulated fingers (3) which connects two housings (1) to one another, a first housing (1) to which a locking device (6) is connected , can be inserted into the narrow side of the door leaf and the second housing (1) into the door frame, the locking device (6) having a fluid chamber (8) through which an axially spring-loaded and displaceable joint fingers (3) at the ends relative to the first Housing (1) pivotable joint (2) held pull rod (5), a fluid-open blocking element (10) being arranged in the fluid chamber (8), which is held stationary on the pull rod (5) and, depending on the displacement position of the Tie rod (5), rests tightly against the wall of the fluid chamber (8) or is at least partially exposed to the wall.

Description

The invention relates to a concealed door hinge according to the preamble of claim 1.

Such concealed door hinges are well known. They are used to create a connection between a door leaf and a stationary door frame in such a way that they are not visible when closed, which conveys a special value from a design perspective. A concealed door hinge is available, for example DE 10 2005 051 918 A1 disclosed.

In particular, in order to make it easier and therefore more convenient to open and close the door, the use of locking devices is known, by means of which the door leaf is opened and closed largely automatically. However, the known locking devices only come closer to this goal to an unsatisfactory extent.

For example, in the US 4,875,252 proposed to provide a concealed door hinge with a locking device that has a spring-loaded pull rod.

However, this concealed door hinge does not meet the requirements insofar as the closing force to be applied by the compression spring is not sufficient, especially in the closed end position of the door leaf, to bring a lock tongue on the door leaf side into engagement with an opening on the door frame side. This means that it is not guaranteed to bring the door leaf into the closed position without manual pressure.

In the DE 20 2020 100 939 U1 A locking device is therefore proposed which has a spring-loaded tensioning device, combined with a commercially available damping element. This means that different, functionally different component arrangements are provided for different functions, namely for closing the door and for damping during closing.

However, the implementation of this closing and damping device is only possible with considerable design and manufacturing effort, The large number of individual parts, all of which have to be functionally linked to one another, naturally entails the risk of defects.

The invention is based on the object of further developing a concealed door hinge of the generic type in such a way that the functionality of the locking device is improved and can be implemented with little design and manufacturing effort.

This task is solved by a concealed door hinge with the features of claim 1.

The design according to the invention results in a whole series of advantages over the prior art. First of all, it should be noted that the locking device can be manufactured with a small number of simple components, which takes into account the constant demands for cost optimization.

In addition to these economic advantages, the invention also results in remarkable functional advantages. For example, only the closing movement of the door is dampened, while there is no damping when the door is opened, the door being closed by at least one spring that is tensioned when it is opened, in such a way that the door is pulled into the door frame and a lock tongue of the door lock can snap into place.

Furthermore, the preload of the spring is adjustable so that the closing force can be adapted to the respective conditions.

According to an advantageous development, as seen in the opening direction of the door, a stop is attached to the pull rod at a distance downstream of the fluid-open blocking element and a closure disk is slidably guided on the pull rod in the gap formed.

While when the door is opened, the locking disk rests against the stop and is positioned at a distance from the locking element, so that the openings of the locking element are completely open to the fluid passage, when the door is closed, caused by the resistance of the fluid, the locking disk is pressed against the locking element and thus closing part of the fluid opening of the blocking element.

The blocking element initially lies tightly against the wall of the fluid chamber until the opening angle of the door reaches, for example, approximately 20° and then the damping is greatly reduced in that the blocking element no longer lies sealingly against the wall, at least in a partial area, that is, the fluid resistance on the blocking element is reduced.

In order to minimize the damping before the door reaches the closed position, in the aforementioned sense in that the blocking element no longer lies completely tightly against the wall of the fluid chamber over a predetermined opening angle of the door, the cross section of the fluid chamber is enlarged in the closing direction of the door, which can be done by different shapes. Due to the minimized damping, the spring force now comes into effect, with which the door is pressed into the closed position.

Further advantageous embodiments of the invention are characterized in the subclaims.

Exemplary embodiments of the invention are described below with reference to the accompanying drawings.

Figur 1

ein Verdeckttürband gemäß der Erfindung in einer perspektivischen Ansicht;

Figur 2

das Verdeckttürband in einer teilweise geschnittenen Seitenansicht;

Figur 3

eine Einzelheit des Verdeckttürbandes in einer geschnittenen Seitenansicht;

Figur 4

einen Schnitt durch die Einzelheit gemäß der Linie IV-IV in Figur 3;

Figuren 5a) bis d)

die Einzelheit nach Figur 3 in unterschiedlichen Funktionsstellungen der Schließeinrichtung;

Figur 6

ein weiteres Ausführungsbeispiel des erfindungsgemäßen Verdeckttürbandes als Einzelheit in einer geschnittenen Seitenansicht;

Figur 7

einen Schnitt durch die Einzelheit gemäß der Linie VII-VII in Figur 6;

Figur 8a) bis d)

die Einzelheit nach Figur 6 in unterschiedlichen Funktionsstellungen.

Show it:

Figure 1

a concealed door hinge according to the invention in a perspective view;

Figure 2

the concealed door hinge in a partially sectioned side view;

Figure 3

a detail of the concealed door hinge in a sectioned side view;

Figure 4

a section through the detail according to line IV-IV in Figure 3 ;

Figures 5a) to d)

the detail Figure 3 in different functional positions of the locking device;

Figure 6

a further exemplary embodiment of the concealed door hinge according to the invention as a detail in a sectioned side view;

Figure 7

a section through the detail according to line VII-VII in Figure 6 ;

Figure 8a) to d)

the detail Figure 6 in different functional positions.

In the Figure 1 is a concealed door hinge for pivotally holding a door leaf on a door frame, with a multi-axis joint 2 having articulated fingers 3, which connects two housings 1 to one another, with a first housing 1, which is in the Figure 1 can be seen on the right side, can be inserted into the narrow side of the door leaf and the branch housing 1 can be inserted into the door frame. The Figure 1 represents a position of the concealed door hinge as it appears when the door is open.

A locking device 6 is connected to the first housing 1, which, in particular Figure 2 reproduces very clearly, has a fluid chamber 8.

A pull rod 5 is guided through the fluid chamber 8 and is fastened on the one hand to the articulated fingers 3 which can be pivoted relative to the first housing 1 and on the other hand to a holding plate 9 which is positioned on the side of the locking device 6 opposite the housing 1.

To hold the pull rod 5 on the joint finger 3, a holding element 4 connected to it is provided.

The pull rod can be axially displaced under spring loading by two compression springs 7 arranged parallel and at a distance from one another, which are supported both on the locking device 6 and on the holding plate 9. The pretension of the compression springs 7 can be adjusted via corresponding adjusting elements 18, which are supported on the holding plate 9.

A fluid-open blocking element is arranged in the fluid chamber 8, which is held stationary on the pull rod 5 and which, depending on the displacement position of the pull rod, by means of a seal 13 lies tightly against the wall of the fluid chamber, such as in the Figures 3 and 6 recognizable.

Seen in the closing direction of the door, which is in the Figure 3 is marked by an arrow, is arranged downstream of the locking element 10 and at a distance from it a stop 14 is provided, which is also firmly connected to the pull rod 5.

In the space formed between the locking element 10 and the stop 14, a closure disk 15 is slidably provided on the pull rod 5, which, depending on the position of the locking element 10, closes part of the fluid openings 11, 12, the closure disk 15 then being on the stop 14 facing side of the locking element 10 rests.

In the Figure 3 an embodiment of the fluid chamber 8 is shown, corresponding to that in the Figure 5c ) recognizable position of the locking element 10.

In the example according to the Figures 3 to 5 the fluid chamber has two chamber regions 16, 17, with a first chamber region 16 preferably being cylindrical, but at least having walls running axially parallel to the pull rod 5. The second chamber area 17, on the other hand, is designed to be conical, starting from the first chamber area 16, and widening in the closing direction of the door.

In the Figures 5a ) to d) different positions of the locking element 10 are shown, depending on whether the door is opened or closed.

In the Figures 5a) and 5b ) a position of the locking element 10 can be seen as it occurs when the door is opened. Starting from the position according to the Figure 5a ), in which the blocking element 10 is arranged in the conically widened chamber region 17, in which the closure disk 15 rests on the stop 14 at a distance from the blocking element 10, the fluid can pass through the fluid openings 11, 12 as well as through the exposed area between the blocking element 10 and the wall of the conical chamber area 17 flow, so that the pull rod 5 is displaced exclusively against the spring force of the compression springs 7 in the direction of the arrow, the flow direction of the fluid being indicated by arrows.

As the door opens, the blocking element enters the first cylindrical chamber region 16, whereby the fluid can also flow through the fluid openings 11, 12 without hindrance. Here, however, the blocking element lies close to the wall of the first chamber region 16.

In the Figures 5c) and 5d ) the position of the locking element 10 is shown when the door is closed.

It can thus be seen that the closure disk closes the fluid opening 12, so that only fluid can flow through the exposed fluid opening 11, which results in a damping of the closing movement.

As the closing process continues, the blocking element 10 reaches the second, conical chamber region 17, with the blocking element 10 being exposed relative to the wall of the second chamber region 17, so that the damping is reduced by the decreasing fluid resistance and only the force of the compression springs 7 ensures the closure of the door causes.

The angle of inclination α, as well as the axial length L of the second chamber region 17, can be freely selected and adjusted depending on the desired opening angle of the door at which the damping is to be reduced.

Another embodiment of the fluid chamber 8 is in the Figures 6 and 7 shown. In contrast to the fluid chamber 8 according to the Figure 3 In this case, the second chamber region 17 is not designed to be rotationally symmetrical, but rather as a groove, as is particularly clear in the Figure 7 recognizable.

The position positions of the locking element 10, as shown in the Figures 8a) to 8d ) can be identified correspond to those of the Figures 5a) to 5d ), whereby only in one at the end of the closing process Figure 8d ) and at the beginning of the opening process, the blocking element 10 is only exposed to the wall of the groove, so that the fluid, which otherwise consists of a suitable liquid, preferably an oil, can flow freely in this area.

Instead of the groove-like design of the second chamber region 17, the wall of which also widens obliquely, other comparable chamber regions can also be designed in such a way that free flow is possible of the medium around at least part of the blocking element 10 is possible.

Reference symbol list

1

Housing

2

joint

3

Articulated fingers

4

Holding element

5

pull bar

6

Locking device

7

Compression spring

8th

Fluid chamber

9

Retaining plate

10

Locking element

11

Fluid opening

12

Fluid opening

13

poetry

14

attack

15

Closing disc

16

Chamber area

17

Chamber area

18

Adjustment element

Claims (11)

Concealed door hinge for pivotably holding a door leaf on a door frame, with a multi-axis joint (2) having articulated fingers (3) which connects two housings (1) to one another, a first housing (1) to which a locking device (6) is connected , can be inserted into the narrow side of the door leaf and the second housing (1) into the door frame, characterized in that the locking device (6) has a fluid chamber (8) through which an axially spring-loaded and displaceable, articulated fingers (3) at the ends of a A pull rod (5) which is pivotable relative to the first housing (1) is guided, with a fluid-open blocking element (10) being arranged in the fluid chamber (8), which is held in a stationary manner on the pull rod (5) and which, depending after the displacement position of the pull rod (5), lies tightly against the wall of the fluid chamber (8) or is at least partially exposed to the wall. Concealed door hinge according to claim 1, characterized in that on the side of the locking element (10) facing away from the first housing (1) there is a locking disk (15) which is displaceably mounted on the pull rod (5) and which, when in contact with the locking element (10), has a locking disk (15). Part of fluid openings (11, 12) closes. Concealed door hinge according to claim 1 or 2, characterized in that the closure disk (15) is positioned between the locking element (10) and a stop (14) arranged at a distance therefrom and connected to the pull rod (5). Concealed door hinge according to one of the preceding claims, characterized in that the fluid chamber (8) has a first chamber region (16) and an adjoining chamber region (17) which is larger in cross section, the locking element (10), depending on the displacement position, being close to the Wall of the first chamber area (16) rests or is free against the wall of the second chamber area (17) with a larger cross-section. Concealed door hinge according to one of the preceding claims, characterized in that the second chamber region (17) is conical and widening at least in some areas. Concealed door hinge according to one of the preceding claims, characterized in that the widening second chamber region (17) is designed as a groove. Concealed door hinge according to one of the preceding claims, characterized in that the wall of the first chamber region (16) runs axially parallel to the pull rod (5). Concealed door hinge according to one of the preceding claims, characterized in that the pull rod (5) is attached to a holding plate (9) with its end facing away from the joint (2). Concealed door hinge according to one of the preceding claims, characterized in that at least one compression spring (7) is provided, which is supported on the one hand on the holding plate (9) and on the other hand on a relatively stationary part of the locking device (6). Concealed door hinge according to one of the preceding claims, characterized in that the compression spring (7) is aligned axially parallel to the pull rod (5). Concealed door hinge according to one of the preceding claims, characterized in that an adjusting element (18) is provided with which the spring stroke of the compression spring (7) can be adjusted.

Images