EP2873793A1 - Door closer - Google Patents

Abstract

The present invention relates to a top door closer (1) comprising a housing (2), a rotatably mounted in the housing (2) output shaft (5) with a cam disc (7), a flap carriage (8) with two rotatably mounted in the tab carriage (8) pressure rollers (11), wherein the pressure rollers (11) on the cam disc (7) roll, a in the housing (2) linearly guided piston (14), a piston rod (12) having one end with the tab carriage (8) and with the other End is connected to the piston (14), and a closing spring (16) which on the flap carriage (8) facing side of the piston (14) on the piston (14) is supported.

Description

The present invention relates to a overhead door closer for actuating a door leaf. Furthermore, a door closer assembly comprising the overhead door closer is provided.

From the overhead door closer described here so-called bottom door closers and door drives are to be distinguished. The overhead door closer is attached to the door leaf, the wall or the frame. The power transmission of the output shaft of the overhead door closer is done with a lever. If the overhead door closer, for example, attached to the door leaf, a lever is mounted, which is connected at one end to the output shaft of the overhead door closer and connected to the other end with the frame, in particular a slide rail on the frame. Alternatively, the overhead door closer can also be attached to the wall or frame. In this case, the lever transmits the power from the output shaft to the door leaf. In contrast, floor door closers are arranged in the floor, under, or next to the door leaf. In this case, a cranked door lever is used with a supporting function. The axis of rotation of the door leaf is coaxially connected to the output shaft of the bottom door closer. Furthermore, there are door drives in which the opening and / or closing direction of the door leaf is actuated hydraulically and / or electrically. Door drives are here also understood as so-called servo door closers, which support the manual opening operation of the door leaf and / or electrically or hydraulically bias the closing spring.

It is an object of the present invention to provide an overhead door closer that enables safe and low-maintenance operation at low cost production and assembly.

The object is solved by the features of the independent claims. The dependent claims have advantageous developments of the invention to the subject.

Thus, the object is achieved by a overhead door closer comprising a housing, a rotatably mounted in the housing output shaft with a cam and a flap carriage. The flap carriage has two rotatably mounted in the flap carriage pressure rollers. These two pressure rollers roll on each side of the cam. The cam is eccentric with respect to the output shaft. As a result, a rotational movement of the output shaft can be converted via the cam disc and the pressure rollers in a linear movement of the flap carriage. In reverse order, a linear movement of the flap carriage on the pressure rollers and the cam is converted into a rotational movement of the output shaft. Furthermore, a linearly guided piston is provided in the housing. The piston is connected via a piston rod with the flap carriage. Due to the connection between the flap carriage and the piston by means of the piston rod, the flap carriage and the piston always execute the same linear movement. Furthermore, a closing spring is arranged in the housing, which is supported on the side facing the flap of the piston on the piston. The closing spring is thus located between the piston and the output shaft. In an opening operation of the door by a user, the output shaft is rotated. This leads to a linear movement of the flap carriage, the piston rod and the piston. About the piston the closer spring is compressed. After entering the door, the closer spring can relax again and thus move the piston, the piston rod and the flap carriage in the opposite direction linear, so that the door leaf is closed via the output shaft.

In prior art arrangements, the two pressure rollers are usually stored directly in the associated piston. These pistons in turn are linearly movable in the housing. This has the disadvantage that the support of the transverse forces, via these the pressure rollers receiving piston, very close to the force application point, namely the output shaft is located. As a result, prior art arrangements required the guide surfaces for these pistons to be extremely precise, hard and durable. In the overhead door closer according to the invention shown here, the pressure rollers are mounted in the flap carriage and the flap carriage is connected via the piston rod to the piston. As a result, the piston, which is far away from the force application point, namely the output shaft, linearly guided. This has the consequence that the transverse forces acting on the piston are smaller and thus the linear guidance of the piston can be made simpler. According to the invention, it is defined that the closing spring is supported on the side of the piston facing the flap carriage. As a result, there is thus the closing spring between the output shaft and piston, which in turn, depending on the overall dimensioning of the overhead door closer, a certain distance between the output shaft and piston, or a certain length of the piston rod is predetermined.

When overhead door closer according to the invention is always the introduction of force by the user and also by the door drive on the door leaf. This force is transmitted via a lever or a linkage to the Output shaft introduced and only via this output shaft is an introduction of force from outside the system in the overhead door closer into it.

The efficiency-increasing reduction of the transverse forces is preferably provided for the construction with flap carriage, piston rod and large lid. Thus, the possibility for a favorable design of the housing made of injection molded parts, including plastic, is possible. Preferably, no contact of the flap carriage on the housing interior.

Particularly preferably, there are only three bearing points in the entire overhead door closer to the housing. The output shaft is rotatably mounted in two places in the housing. The third bearing position is the linear guide of the piston in the housing. Thus, it is preferably provided that the flap carriage does not touch the housing and is guided only by at least one of the two pressure rollers and the piston rod and the axis. In the tab truck is compared to the cam axis, not the housing, another guide of the flap carriage in the form of a slot provided.

It is particularly preferably provided that the housing comprises an opening and a lid closing the opening, wherein in the cover the output shaft is mounted at least on one side and wherein the entire flap carriage with the cam axis via the opening in the housing can be used. So there is a complete assembly of the flap carriage over the opening. The dimensioning of the opening and the lid is thus adapted to the flap carriage. The tab carriage can be mounted outside the housing and inserted over the opening. This is not one Opening and a lid on the front side of the housing, but it is particularly preferably also the output shaft stored in the lid. The lid thus has a breakthrough in which the output shaft is inserted.

Furthermore, it is preferably provided that the housing consists of injection-molded, low-strength material (for example: aluminum die-cast, plastic or die-cast zinc) with inserted metal elements. Thus, the housing is inexpensive, with little or no subsequent machining, produced. Due to the lower housing loads due to the mechanical structure according to the invention, low-resistance materials can be used. The metal elements are inserted in particular at the points where a precise storage of components and / or a wear-resistant frictional contact between components is necessary. In particular, the guide surface of the piston is reinforced in the housing by inserted metal elements. For this purpose, either a socket or parallel metal strips are miteingegossen in the injection-molded housing. Particularly preferably, both the main body of the housing and the large lid described above are made of low-strength material. For storage of the output shaft metal bearing elements can be miteingegossen or used later. Furthermore, in particular the front side, hydraulic valves are screwed into the housing. For defined and safe recording of these valves in the housing valve receiving bushes are cast with. The inserts can be post-machined after inserting.

In a further preferred embodiment, it is provided that the closing spring is supported against a shoulder in the housing, said shoulder being positioned between the output shaft and the piston. The Closing spring is thus supported with one end against the shoulder and with the other end against the piston.

The piston rod is preferably rotatably connected to the piston. The connection between the piston rod and the flap carriage is rigid. For this purpose, either parts of the flap carriage and the piston rod are made integral with each other or the piston rod and the tab carriage are bolted together.

It is preferably provided that the entire space in the housing from the tab carriage to the piston is freely continuous and in particular is not broken by partitions. The piston rod is therefore not passed through a partition wall, but extends freely from the flap carriage to the piston. In this room is in particular also the closing spring. So there are only two rooms especially in the whole housing. The one large space extends from the flap car to the flap carriage side facing the piston. On the other side of the piston may be another, small space in which hydraulic oil is located for closing damping.

To form the rigid connection between the flap carriage and the piston rod, the flap carriage is preferably produced integrally with the piston rod, that is, this is a jointly manufactured component. When forming the integral production, it is provided that the flap carriage comprises at least one carrier element. On this carrier element both pressure rollers are mounted. This support member is preferably made integral with the piston rod or a part of the piston rod. Alternatively, the flap truck and piston rod can be rigidly connected to each other. Preferably, tabbed cars and piston rod are screwed. The axes of Screwing extend either parallel to the output shaft or perpendicular to the output shaft.

The cover over which the flap carriage is preferably mounted, in particular, is so large that the entire flap carriage, including the output shaft, can be inserted over the opening. Furthermore, the opening and the lid are dimensioned so that the screw connection, in particular with a screwing axis parallel to the output shaft, is accessible to the connection of the flap carriage and piston rod via this opening.

Instead of this screw with a screw axis parallel to the output shaft can also be provided a perpendicular to the output shaft extending threaded bolt on the flap. Preferably, the flap carriage is mounted with this threaded bolt from above the opening here. Perpendicular to this, the piston rod together with the piston is introduced via an end opening in the housing and bolted to the threaded bolt, which extends perpendicularly to the output shaft.

The invention further includes a door closer assembly having a top door closer just described, a lever and a slide rail. One end of the lever is rotatably connected to the output shaft and the other end of the lever is guided linearly movable in the slide rail. The overhead door closer is fastened either to a wall, a frame or directly to the door leaf. The described in the context of the overhead door closer advantageous embodiments and subclaims find correspondingly advantageous application to the door closer arrangement according to the invention.

Fig. 1

einen erfindungsgemäßen Obentürschließer gemäß einem ersten Ausführungsbeispiel,

Fig. 2

ein Detail des erfindungsgemäßen Obentürschließers gemäß dem ersten Ausführungsbeispiel,

Fig. 3

den erfindungsgemäßen Obentürschließer gemäß dem ersten Ausführungsbeispiel im montierten Zustand,

Fig. 4

einen erfindungsgemäßen Obentürschließer gemäß einem zweiten Ausführungsbeispiel,

Fig. 5

einen erfindungsgemäßen Obentürschließer gemäß einem dritten Ausführungsbeispiel,

Fig. 6

einen erfindungsgemäßen Obentürschließer gemäß einem vierten Ausführungsbeispiel, und

Fig. 7

einen erfindungsgemäßen Obentürschließer gemäß einem fünften Ausführungsbeispiel.

In the following, embodiments of the invention will be explained in detail with reference to the accompanying drawings. Showing:

Fig. 1

an overhead door closer according to the invention according to a first embodiment,

Fig. 2

a detail of the overhead door closer according to the invention according to the first embodiment,

Fig. 3

the overhead door closer according to the invention according to the first embodiment in the assembled state,

Fig. 4

an overhead door closer according to the invention according to a second embodiment,

Fig. 5

an overhead door closer according to the invention according to a third embodiment,

Fig. 6

an overhead door closer according to the invention according to a fourth embodiment, and

Fig. 7

an overhead door closer according to the invention according to a fifth embodiment.

In the following, five embodiments of an overhead door closer 1 according to the invention are explained in detail. Identical or functionally identical components are provided with the same reference numerals in all embodiments.

Fig. 1 shows four different views of the overhead door closer 1 according to the first embodiment. The overhead door closer 1 comprises a housing 2 with a main body 3 and a lid 4. The main body 3 and the lid 4 are produced by injection molding. In the cover 4 and in the main body 3, an output shaft 5 is rotatably mounted. At one end of the output shaft 5 is a polygon 6. About this polygon 6, a lever or a rod rotatably connected to the output shaft. On the output shaft 5 is rotatably seated a cam plate. 7

In the interior of the housing 3, a flap carriage 8 is arranged. This flap-type carriage 8 has no direct contact or guidance with respect to the housing 2. The flap-type carriage 8 comprises two parallel carrier elements 9. Between these two carrier elements 9, two pressure rollers 11 are rotatably mounted via pressure roller bolts 10. In each case one of the pressure rollers 11 is located on one side of the cam disc 7. The two pressure rollers 11 roll on the cam plate 7 from.

Furthermore, in the housing 3, a piston 14 is guided linearly movable. The piston 14 is connected via a piston rod 12 fixed to the flap carriage 8. For connection between the piston rod 12 and plate carriage 8 is a screw 13, formed with two individual screws parallel to the output shaft 5, is provided. The connection between piston rod 12 and piston 14 via a bolt 15. This compound is rotatable about the bolt 15 in a certain margin. Between the piston 14 and a shoulder 17 in the housing 2, a closing spring 16 is arranged. The closing spring 16 is formed as a spiral spring. It is supported at one end against the shoulder 17 and at the other end against the piston 14.

In the housing 2, a guide surface 18 is defined. On this guide surface 18, the piston 14 moves. In addition, the front view on the left in Fig. 1 two valve seats 20. The valve seats 20 and / or the guide surface 18 may be designed as metal insert elements in the housing 3. The guide surface 18 is formed, for example, as a metal bush or as extending in the longitudinal direction metal strip. Furthermore, the shows Fig. 1 One of the bearings 19 is located in the lid 4, the other bearing 19 is located in the main body 3 of the housing 2. These bearings can be made as metal inserts during injection molding. Alternatively, it is possible to subsequently insert the elements of these bearings 19 in the components produced by injection molding.

Fig. 1 further shows a longitudinal axis 21 of the overhead door closer 1. Along this longitudinal axis 21, the flap length 22 is measured. Also parallel to the longitudinal axis 21, the opening length 24 of an opening 23 is measured. This opening 23 is closed by means of the cover 4. The opening length 24 is greater than the tab carriage length 22, so that the preassembled tab carriage 8 can be mounted via the opening 23. Through the use of the cover covering the axle space 4, the completely preassembled flap carriage 8 can be mounted in the housing 2 or in the base body 3 and connected rigidly to the piston rod 12. The complete pre-assembly of the flap carriage 8 together with the output shaft 5 allows a very narrow design and thus the suitability and use in overhead door closers or integrated door closers. Fig. 1 shows in the section AA a width 32 of the cam plate 7. This width 32 is finally in connection with the required movement and play a suitable housing wall thickness, the total width of the overhead door closer 1 before. According to the invention, a very small width 32 is selected here so that the overhead door closer 1 can also be integrated directly into the door leaf.

Fig. 2 shows in the lower part of individual components of the overhead door closer 1. In the upper illustration in Fig. 2 Individual components of a door closer according to the prior art are shown. Based on the schematic representation in Fig. 2 the advantageous embodiment of the overhead door closer 1 according to the invention can be explained. Much is the large distance of the piston 14 of the force application point, namely the output shaft 5. Measured here from the center of the piston 14 to the center of the output shaft 5. The distance is in Fig. 2 indicated by the reference numeral 25. In contrast, the representation of the prior art in Fig. 2 in that the piston 14 with the pressure roller 11 is located considerably closer to the output shaft 5. The overhead door closer shown in the prior art shows a piston 14, which is mounted with the included pressure roller 11 directly in the housing near the output shaft 5. This results in the disadvantage of a very high transverse load due to the small distance of the piston to the force application point, which in turn generates friction and wear. This results in a poor efficiency result. Furthermore, the hydraulic oil is heavily contaminated by the resulting abrasion, resulting in irregularities in the life of the door closer.

According to the invention it is now provided that by the mechanical system consisting of the tab carriage 8 and the piston rod 12, a generation of the moments within the components is achieved by multiple functions. The housing 2 becomes clear less load, which greatly reduces surface pressure, friction, wear and loss of efficiency. By this system, a cost-effective housing, advantageously produced by injection molding, can be realized. Furthermore, a rigid connection is made possible by the series arrangement of the piston rod 13, which requires only a narrow space. Fig. 2 shows how the transverse load to be supported via the piston 14 can be introduced by means of the piston rod 12 far away from the force introduction point into the housing. The associated large lever arm allows small support forces and thus a lower friction and a higher efficiency at the guide surface 18. The internal lever system consisting of piston rod 12 and 8 flap carriage, the support of the lateral force in the housing 2 by a multiple, compared to the prior Technology, reduced and thus reduces friction losses and wear. In addition, the housing 2 must take less leadership functions and can thus be made cheaper.

It should be noted at this point that in the overhead door closer 1 shown, the torques required for the door control on the output shaft 5 and thus the internally occurring forces are much lower than, for example, in a floor-type door closer. In the bottom door closer, the axis of rotation of the door leaf is connected directly, coaxially with the output shaft. In contrast, a linkage is connected to the overhead door closer 1 on the polygon 6, so that the eventual load in the overhead door closer 1 fails less. As a result, the housing 2 of the overhead door closer 1 according to the invention cheaper, for example, made of plastic, zinc die-cast or die-cast aluminum, and it is sufficient if, for example, the guide surfaces 18 are reinforced by metal inserts. This is especially so possible because of the relatively long distance 25 of the piston 14 is very far away from the output shaft 5. The embodiment shown is suitable for overhead door closer, especially for those who are very slim and thus can even be integrated into the door itself. To define this narrow structure, provision is made in particular for the spacing 25 to be 5 to 10 times the width 32.

Fig. 3 shows the overhead door closer 1 according to the first embodiment in the assembled state. Thus, in Fig. 3 to see an entire door closer arrangement. The overhead door closer 1 is mounted on the door leaf 26. On the frame 27 is a slide 28. On the output shaft 5, a lever 29 is rotatably mounted. The other end of the lever 29 slides in the slide rail 28th

Fig. 4 shows a second embodiment of the overhead door closer 1. In this embodiment, the tab carriage 8 comprises only a support member 9. On this support member 9, the pressure rollers 11 are mounted on the pressure roller pin 10. The carrier element 9 is manufactured integrally with the piston rod 12. This is preferably a milled part which represents both the piston rod 12 and the carrier element 9 of the flap carriage 8. Here, the output shaft 5 can be retrofitted with the cam plate 7 from the top of the housing. The housing cover 4 can be much smaller, for example, as a round part, running.

Fig. 5 shows a third embodiment of the overhead door closer 1. Also in the third embodiment, the single support member 9 is integrally made with the piston rod 12. Here is a common sheet metal bending part, which represents the piston rod 12 and the support member 9 of the flap carriage 8. Again, the Output shaft 5 are mounted with the cam 7 subsequently from the top of the housing. The housing cover 4 can be much smaller, for example, as a round part, running.

Fig. 6 shows a fourth embodiment of the overhead door closer 1. Shown is a threaded bolt 30 on the tab carriage 8. The threaded bolt 30 extends in the longitudinal direction 21. On this threaded bolt 30, the piston rod 12 is screwed. The piston rod 12 is still in the FIG. 6 to mark.

Fig. 7 shows a fifth embodiment of the overhead door closer 1. In the fifth embodiment, the threaded bolt 30 comprises an eye 31. About this eye 31 of the threaded bolt 30 is connected to the tab carriage 8, in particular screwed. The threaded bolt 30 extends in the longitudinal direction 21. On this threaded bolt 30, the piston rod 12 is screwed.

LIST OF REFERENCE NUMBERS

1

Overhead closer

2

casing

3

body

4

cover

5

output shaft

6

polygon

7

cam

8th

cam plate

9

support element

10

Pressure roller pins

11

pressure roller

12

piston rod

13

screw

14

piston

15

bolt

16

closer spring

17

paragraph

18

guide surface

19

bearings

20

valve seats

21

longitudinal axis

22

Lasch car length

23

opening

24

opening length

25

distance

26

door leaf

27

frame

28

slide

29

lever

30

threaded bolt

31

eye

32

width

Claims (14)

Comprising overhead door closers (1) a housing (2), - A housing (2) rotatably mounted output shaft (5) with a cam disc (7), - A flap carriage (8) with two rotatably mounted in the tab carriage (8) pressure rollers (11), wherein the pressure rollers (11) on the cam disc (7) roll, - A in the housing (2) linearly guided piston (14), - A piston rod (12) which is connected at one end to the flap carriage (8) and at the other end to the piston (14), and - A closing spring (16), which on the flap carriage (8) facing side of the piston (14) on the piston (14) is supported. Upper door closer according to claim 1, characterized in that the housing (2) comprises an opening (23) and an opening (23) closing the lid (4), wherein in the cover (4) the output shaft (5) is mounted, and wherein the tab carriage (8) can be inserted into the housing (2) via the opening (23). Upper door closer according to one of the preceding claims, characterized by a distance (25) from the output shaft (5) to the center of the piston (14) and a width (32) of the cam disc (7), wherein the distance (25) the 5-10 times the width (32). Upper door closer according to one of the preceding claims, characterized in that the housing (2) consists of materials suitable for the injection molding process, such as plastic, with inserted metal elements. Upper door closer claim 4, characterized in that a guide surface (18) for the piston (14) in the housing (2) is formed by an inserted metal bushing or by inserted metal strip. Upper door closer according to one of the preceding claims, characterized in that the tab carriage (8) does not touch the housing (2) and is guided only via the two pressure rollers (11) and the piston rod (12). Upper door closer according to one of the preceding claims, characterized in that the closing spring (16) is supported against a shoulder (17) in the housing (2), wherein the shoulder (17) between the output shaft (5) and the piston (14) is positioned , Upper door closer according to one of the preceding claims, characterized in that the piston rod (12) is rotatably connected to the piston (14). Upper door closer according to one of the preceding claims, characterized in that the space in the housing (2) from the tab carriage (8) to the piston (14) is freely continuous and in particular is not broken through partitions. Upper door closer according to one of the preceding claims, characterized in that the flap carriage (8) integral with the Piston rod (12) is made or rigid with the piston rod (12) is connected. Upper door closer according to one of the preceding claims, characterized in that the flap carriage (8) comprises at least one support element (9) on which both pressure rollers (11) are mounted and the carrier element (9) is made integral with the piston rod (12). Upper door closer according to one of claims 1 to 10, characterized in that the flap carriage (8) with the piston rod (12) is screwed. Upper door closer according to claim 12, characterized in that the axis of the screw connection (13, 30) between the flap carriage (8) and piston rod (12) is arranged perpendicular or parallel to the output shaft. A door closer assembly comprising an overhead door closer (1) according to any one of the preceding claims, a lever (29) and a slide rail (28), one end of the lever (29) being connected to the output shaft (5) and the other end of the lever (29). in the sliding rails (28) is linearly guided.

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