DOOR ACTUATOR FOR OPENING AND/OR CLOSING A DOOR

Abstract

A door actuator for opening and/or closing a door, comprising includes a fluid housing with an inner compartment, which is filled with fluid, in particular hydraulic oil, a fluid housing opening in the fluid housing for draining the fluid at thermal overload, a thermally activatable valve for opening, which closes the fluid housing opening, and a collecting device which is disposed outside the fluid housing opposite the fluid housing opening, forms a collecting space for the fluid, is open towards the fluid housing opening, and includes at least one drain opening for draining the fluid from the collecting space.

Claims

1. A door actuator for opening and/or closing a door, the door actuator comprising: a fluid housing with an inner compartment-, which is filled with fluid, a fluid housing opening in the fluid housing for draining the fluid at thermal overload, a valve configured to closes the fluid housing opening, is a thermally activatable for opening, and a collecting device, disposed outside the fluid housing opposite the fluid housing opening, forms a collecting space for the fluid, is open towards the fluid housing opening, and includes at least one drain opening for draining the fluid from the collecting space.

2. The door actuator according to claim 1, wherein the collecting device comprises a splash wall, opposite the fluid housing opening and disposed for collecting the drained fluid in the collecting space.

3. The door actuator according to claim 2, wherein, at the lower end of the splash wall, the collecting device comprises a drain surface inclined towards the drain opening for the fluid.

4. The door actuator according to claim 3, wherein the collecting device comprises two opposite inclined drain surfaces for the fluid, wherein, depending on the mounting orientation of the door actuator, one of the two drain surfaces is located at the lower end and the other drain surface is unused at the upper end of the splash wall.

5. The door actuator according to claim 3, wherein the collecting device comprises at least one inclined additional drain surface for the fluid, wherein the additional drain surface is disposed such that the fluid flows from the splash wall over the inclined drain surface onto the additional drain surface and from the additional drain surface to the drain opening.

6. The door actuator according to claim 1, wherein the at least one drain opening is disposed on a side of the collecting device facing away from the mounting side of the door actuator.

7. The door actuator according to claim 1, wherein the at least one drain opening directly opens to the surroundings.

8. The door actuator according to claim 1, wherein the collecting device comprises at least two opposite drain openings for the fluid, wherein, depending on the mounting orientation of the door actuator, one of the two drain openings is located at the lower border and the other drain opening is unused at the upper border of the collecting device.

9. The door actuator according to claim 1, wherein the collecting device comprises a plate component, wherein the plate component forms the splash wall and is disposed at the fluid housing or at a mounting plate.

10. The door actuator according to claim 1, wherein the collecting device comprises a collecting housing component, wherein the collecting housing component comprises the at least one drain opening, wherein the collecting housing component is mountable at, fittable on the plate component, and/or on the cover screw.

11. The door actuator according to claim 1, comprising a cover covering the fluid housing of the door actuator, wherein at least one area of the collecting device, is formed by a front-sided end cap of the cover.

12. The door actuator according to claim 1, wherein the collecting housing component is integrally formed with the plate component, wherein the collecting housing component is mountable at, fittable on the cover screw.

13. The door actuator according to claim 1, wherein the valve comprises a trigger element, which, for opening the valve, is destructible and/or deformable and/or meltable under thermal effect.

14. The door actuator according to claim 12, wherein the valve comprises a valve body in the fluid housing opening and a valve cover screw screwed into the fluid housing opening, wherein the trigger element is clamped between the valve body and the valve cover screw.

15. The door actuator according to claim 13, wherein the valve cover screw is fluid permeable.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Now, the disclosure is described in more detail based on an exemplary embodiment. In this case, it shows:

[0041] FIG. 1 an inventive door actuator according to an exemplary embodiment,

[0042] FIG. 2 essential components inside the inventive door actuator according to the exemplary embodiment,

[0043] FIG. 3 a sectional view in the area of a cover screw of the inventive door actuator according to the first exemplary embodiment,

[0044] FIG. 4 a collecting device of the inventive door actuator according to the exemplary embodiment,

[0045] FIG. 5 a first sectional view of the collecting device of FIG. 4, and

[0046] FIG. 6 a second sectional view of the collecting device of FIG. 4.

DETAILED DESCRIPTION OF THE DRAWINGS

[0047] In the following a door actuator 1, formed as a door closer, is explained in detail. In this case, unless otherwise stated, reference is always made to all the Figures.

[0048] The door actuator 1 includes a fluid housing 3. Herein, the fluid housing 3 is a cast component from metal. Via a mounting plate 4 of the door actuator 1, the fluid housing 3 can be attached to a door leaf or a casing of a door. The attachment side is also referred to as the mounting side 2.

[0049] Furthermore, the door actuator 1 comprises a cover 5. The cover 5 comprises a main cover 6, which covers the fluid housing 3 on three sides. Front-sided, the cover 5 comprises two end caps 7 for covering the two front faces of the fluid housing 3.

[0050] As in particular revealed in the combined view of the FIGS. 1 and 2, the door actuator 1 comprises an output shaft 10, which is rotatably mobile supported in the fluid housing 3. In this case, the rotary movement is about an output axis 16. When usually using the door actuator 1, said output axis 16 is vertical.

[0051] In the example shown, the output shaft 10 has a connection on both sides, formed as a square. The door actuator 1 can be mounted in two mounting orientations such that optionally the one or the other connection 11 is oriented upwards.

[0052] The fluid housing 3 forms an inner compartment 8 (see FIG. 3), which can be subdivided into individual fluid compartments. At the two front faces, the fluid housing 3 comprises respectively one cover screw 9, which seals the inner compartment 8. Fluid, in particular hydraulic oil, is in the inner compartment 8.

[0053] As revealed in FIG. 2, a closing piston 12 and a closing spring 13 are located in the inner compartment 8. With an appropriate roller, the closing piston 12 bears on a cam 14 of the output shaft 10. The closing spring 13 acts on the opposite side of the closing piston 12. By manually opening the door, the output shaft 10 is entrained into rotation. Thereby, the cam 14 and the closing piston 12 are moved to the right (according to the illustration in FIG. 2). Thereby, the closing spring 13 is tensioned. When closing the door, the closing spring 13 relaxes, the closing piston 12 is moved to the left, whereby the output shaft 10 is again entrained into rotation. With the intention to dampen said closing movement, the dampening piston 15 is disposed in the inner compartment 8, which is in contact with the cam 14 likewise via an appropriate roller. The cover screw 9 shown in the FIGS. 2 and 3 closes the front face facing the dampening piston 15. A fluid housing opening 20 is formed in said cover screw 9. A valve 21, which is thermally activatable, is located in said fluid housing opening 20.

[0054] FIG. 3 shows in detail that the valve 21 includes a valve body 22, which is sealingly seated in the fluid housing opening 20. On the outside, a valve cover screw 24 is screwed into the fluid housing opening 20. A trigger element 23, which, in the intact condition thereof retains the valve body 22 in the valve seat, is located between the valve body 22 and the valve cover screw 24.

[0055] In the exemplary embodiment shown, the trigger element 23 is formed as a thermo glass vial. Under corresponding thermal effect said thermo glass vial is destroyed. Thereby, allowing the valve body 22 to detach from the valve seat thereof on account of a correspondingly high internal pressure in the inner compartment 8.

[0056] The valve cover screw 24 includes several holes 25, through which the fluid can squirt to the outside.

[0057] A collecting device 30 is located outside the fluid housing 3, at the front face with the fluid housing opening 20. In this exemplary embodiment, a plate component 31 and a collecting housing component 32 form the collecting device 30. Simultaneously, the collecting housing component 32 is one of the two end caps 7 of the cover 5.

[0058] In FIG. 3, the collecting housing component 32 is almost completely masked. Just a wedge-shaped insert, which forms an additional drain surface 39, is illustrated herein. FIG. 4 shows the complete collecting device 30. FIGS. 5 and 6 show two sectional views through said collecting device 30.

[0059] The collecting housing component 32 includes an outer wall and an opposite inner wall 34. Outer wall 33 and inner wall 34 are spaced apart from each other and on three sides connected via sidewalls 35. Components of the end cap 7 visible from outside are the outer wall 33 and the three sidewalls 35. Towards the mounting side 2, the collecting housing component 32 is open, so as to be slidable onto the plate component 31. The inner wall 34 is open so that the fluid can squirt into the collecting device 30.

[0060] In the exemplary embodiment shown, the plate component 31 is attachable to the mounting plate 4, in particular screwable.

[0061] The collecting device 30 forms a collecting space 36, which collects the fluid leaking from the fluid housing opening 20. A splash wall 37 delimits said collecting space 36. The splash wall 37 is a vertically upright wall, which herein the plate component 31 forms. Respectively one inclined drain surface 38 is provided on both sides, namely at the upper and lower ends of the splash wall 37. The plate component 31 forms the inclined drain surfaces 38. Depending on the mounting orientation of the door actuator, one of both inclined drain surfaces 38 is located on the top side and thus is unused. The fluid runs downwards at the splash wall 37 onto the inclined drain surface 38 disposed underneath the splash wall 37.

[0062] In the exemplary embodiment, the additional drain surface 39 is provided, which a correspondingly wedge-shaped part forms and which is disposed in the collecting housing component 32. The fluid flows over the inclined drain surface 38 onto the additional drain surface 39 and from there to a drain opening 40.

[0063] Independently of the rest of the configuration of the exemplary embodiment, the drain opening 40 is located on a side of the collecting device 30 facing away from the mounting side 2.

[0064] Complementary to the illustration shown, it is preferably provided as well that the collecting device 30, in particular the collecting housing component 32 includes two opposite drain openings 40, wherein the top located drain opening 40 then remains unused. It is likewise possible to provide an additional drain surface 39 on both sides.