TW201923209A - Door closer capable of configuring the switchable closing speed change of the door closer in the second door angle closure region with respect to the first door angle closure region - Google Patents

Abstract

The present invention relates to a door closer (14) for a door leaf (10) and, more particularly, to a slide type door closer, wherein the door closer (14) has a closed hydraulic system (22) for adjusting the closing speed of the door leaf (10). The closed hydraulic system (22) includes a first fluid path (E) having a first fluid flow-regulating valve (36), wherein fluid flows through the first fluid flow-regulating valve (36) during a period in which the door leaf (10) is closed in a first door angle closure region (A) of the door closer (14). The closed hydraulic system (22) includes a second fluid path (F) having a first fluid flow-regulating valve (36) and a second fluid flow-regulating valve (38). The fluid flows through the first fluid flow-regulating valve (36) and the second fluid flow-regulating valve (38) during a period in which the door leaf (10) is closed in a second door angle closure region (B) of the door closer (14). With the use of the second fluid flow-regulating valve (38), it is able to configure the switchable closing speed change, in particular the closing delay, of the door closer (14) in the second door angle closure region (B) with respect to the first door angle closure region (A).

Description

   door closer   

The present invention relates to a door closer for a door leaf, particularly a sliding rail type door closer.

A slide-rail door closer is known from EP 1 362 155 B1. The slide-type door closer has a piston supported on a closing spring guided in a housing, and a pinion gear rotatably mounted on the housing and engaged with a rack of the piston.

DE 20 2008 005 721 U1 discloses a door closer with a hydraulic closing delay. The door closer has a door closer shaft coupled to the brake fan, which can be rotated from the closed position in at least one direction of rotation and is connected to a travel cam disc supported in the housing. The stroke cam disc cooperates with at least one active element, which is connected to a hydraulic damping device and is housed in an oil squeeze hydraulic piston. The contour section of the stroke cam disc cooperating with the action element has a corner section, and the corner section of the stroke cam disc causes an increased stroke of the hydraulic piston for improving oil squeeze to achieve the door leaf at this corner section. Delay in closing motion.

In addition, it is known to provide a door closer with a closing hydraulic system having a plurality of fluid paths having a regulating valve for setting a closing speed of a door leaf in a continuous closing phase or a gate angle closing area . The setting of the regulating valve must be implemented separately during the closing phase to prevent the door leaf from being struck. This can be error prone and time consuming.

Therefore, an object of the present invention is to provide a door closer that can easily and quickly set a closing speed for a plurality of closing stages, that is, a door angle closing area.

This object is achieved by a door closer. Advantageous developments are also described herein.

Door closers are in particular sliding door closers for door leaf. The door closer has a closing hydraulic system (for example, a damping hydraulic system) for setting a closing speed of the door leaf. The closed hydraulic system includes a first fluid path having a first fluid flow-regulating valve. During the closing of the door leaf in the first door angle closing area of the door closer, a fluid flow flows through the first fluid flow-regulating valve. The closed hydraulic system includes a second fluid path having a first fluid flow-regulating valve and a second fluid flow-regulating valve. During the closing of the door leaf in the second door angle closing area of the door closer, a fluid flow flows through the first fluid flow-regulating valve and the second fluid flow-regulating valve. With the use of the second fluid flow-regulating valve, it is possible to set a change in the closing speed of the door closer within the second door angle closing area relative to the first door angle closing area, especially the closing delay.

The use of one regulating valve for both fluid paths and the use of a switchable second regulating valve for one of the fluid paths can be achieved: the change in the closing speed of the door leaf can be selectively switchably set through the second door angle closing area . Therefore, there is a possibility that the second regulating valve is not adjusted away from the initial position. It is already possible to prevent the knock of the door leaf in the first and second door angle closed regions by setting the first regulating valve. By not necessarily setting the second control valve, the setting of the door closer can be performed more quickly and easily. If desired, an additional closing delay can be set in the second door angle closing region by means of the second control valve.

In particular, the first fluid path may not have a second regulating valve.

In a particularly preferred embodiment, the second door angle closed region is located within the first door angle closed region. Thus, for example, a closing delay can be provided by a second door angle closing region in a section of the first door angle closing region.

In one embodiment, in the second fluid path, the second fluid flow-regulating valve is connected in series with the first fluid flow-regulating valve. As a result, in particular, a switchable closing delay can be set by means of the second fluid flow control valve.

In one embodiment, the first door angle closed area and the second door angle closed area have a common starting point. Alternatively or additionally, the second door angle closed area is smaller than the first door angle closed area. However, for example, a closing delay can also be provided by a second door angle closing region in the section of the first door angle closing region.

In another embodiment, the closed hydraulic system has a first pressure chamber and a second pressure chamber. The first fluid path fluidly connects the first pressure chamber and the second pressure chamber in a section of the first door angle closed region that does not intersect the second door angle closed region. The second fluid path fluidly connects the first pressure chamber and the second pressure chamber to each other within the second door angle closed region. Therefore, the setting of the first regulating valve is effective for the first door angle closed region and the second door angle closed region contained therein. Conversely, the setting of the second control valve is effective only for the second door angle closed area.

In particular, the first fluid path and the second fluid path may have a fluid connection between the first pressure chamber and the first fluid flow-regulating valve, wherein a first channel, in particular a hole (for example Blind hole) to form the fluid connection. Preferably, the second fluid path has a fluid connection between the first fluid flow-regulating valve and the second fluid flow-regulating valve, wherein a second channel, in particular a hole (for example a blind Holes) to form the fluid connection. Preferably, the first channel and the second channel may be arranged side by side.

In a preferred embodiment, the closing speed of the door closer (and thus the door leaf) in the first door angle closed area and the second door angle closed area can be set by means of the first fluid flow-regulating valve. .

In a preferred embodiment, the first door angle closed region starts in a region between a 180 ° closed angle and a 120 ° closed angle (eg, at a 180 °, 125 ° or 110 ° closed angle) and / or It ends in a region between a 30 ° closing angle and a 10 ° closing angle (for example at 15 °). Alternatively or additionally, the second door angle closed region starts in a region between a 180 ° closed angle and a 120 ° closed angle (for example at a 125 ° or 120 ° closed angle) and / or closes at 90 ° End in the area between the angle and the 60 ° closing angle (for example at a 70 ° closing angle). The switchable closing delay in the second door angle closing area can thus provide, for example, enough time to allow luggage, strollers, beds, etc. to pass through the door without having to hold the door leaf fixed.

In particular, the door leaf closes at a closing angle of 0 °.

It is possible that in a door angle closing area larger than the first door angle closing area, for example, in a region between a 180 ° closing angle and a 125 ° or 120 ° closing angle, the closing for setting the closing speed of the door leaf The hydraulic system can not work. However, the closing hydraulic system may also be active at, for example, a closing angle of 180 ° and / or the first door closing area starts at a closing angle of 180 °.

In another embodiment, the first fluid path and the second fluid path have a common fluid path section disposed upstream of the first fluid flow-regulating valve. Therefore, a common channel for the first fluid path and the second fluid path can be advantageously used, so that, for example, fewer holes are required to provide the first fluid path and the second fluid path.

In one embodiment, in the second fluid path, a second fluid flow-regulating valve is disposed downstream of the first fluid flow-regulating valve. It is thus ensured that switchable throttling of the fluid flow that has been throttled by the first regulating valve in the second fluid path is feasible. Switchable throttling corresponds to a switchable closing delay.

In another embodiment, the closed hydraulic system has a third fluid path having a third fluid flow-regulating valve. The fluid flow flows through the third fluid path (and the third fluid flow-regulating valve) during the closing of the door leaf in the third door angle closing area. In addition, the closed hydraulic system may further include a fourth fluid path having a fourth fluid flow-regulating valve. The fluid flow flows through the fourth fluid path (and the fourth fluid flow-regulating valve) during the closing of the door leaf in the fourth door angle closing area. Therefore, other door corner closing areas can be provided for the door closer to provide, for example, gentle closing of the door and quick-stop stops for reliably closing the door.

In one embodiment, the third door angle closed area is connected to the first door angle closed area and / or the fourth door angle closed area is located in the third door angle closed area. There is therefore no gap between the first door angle closed area and the second door angle closed area. In addition, the closing speed in a section of the third door angle closing region may be changed on the fourth door angle closing region.

In another embodiment, the third door angle closed area begins in a region between a 30 ° closed angle and a 10 ° closed angle (eg, at a 15 ° closed angle) and / or ends at a 0 ° closed angle. Alternatively or additionally, the fourth door angle closed region starts in a region between the 15 ° closed angle and the 5 ° closed angle (for example, at a 7 ° closed angle) and / or ends at a 0 ° closed angle. Therefore, the gentle closing of the door leaf can be set in the third door angle closing area, and a faster closing speed can be set in the fourth door angle closing area, so that the door leaf can be reliably closed.

In one embodiment, the closed hydraulic system further includes a housing having a plurality of through holes. A fluid flow regulating valve (for example, a first fluid flow regulating valve, a second fluid flow regulating valve, a third fluid flow regulating valve, and / or a fourth fluid flow regulating valve) is housed in the through hole. The configuration of the fluid flow regulating valve is such that the fluid flow regulating valve can be set from the two end sides of the corresponding through holes, respectively. This increases the possibilities for installing door closers.

Therefore, the door closer can be especially configured for door leaf installation on the hinge side of the door leaf, top of the frame on the hinge side of the door leaf, top of the frame on the hinge side of the door leaf, and door leaf on the hinge side of the door leaf.

In another embodiment, the closing hydraulic system further has: a shutter shaft with a cam disc rotatably supported; a hydraulic piston with a cam follower (such as a roller), the cam follower following the cam disc; and A housing, in which a hydraulic piston is guided between a first pressure chamber and a second pressure chamber.

In particular, the closer shaft can be connected to a connecting rod of the door closer, which is used to connect with the slide rail of the door closer.

In one embodiment, the first fluid path has a first groove in the hydraulic piston that presets the start and / or length of the first door angle closed region. Alternatively or additionally, the second fluid path has a second groove in the hydraulic piston, which presets the start and / or length of the second door angle closed region. Alternatively or in addition, the third fluid path has a third groove in the hydraulic piston, which presets the start and / or length of the third door angle closed region. Alternatively or additionally, the fourth fluid path has a shoulder on the hydraulic piston, which shoulder presets the start of the fourth door angle closed region. Therefore, the door angle closed area is preset by the movement of the hydraulic piston caused by the cam when the door leaf is pivoted.

In another embodiment, the first fluid path has a first radial passage in the hydraulic piston, the second fluid path has a second radial passage in the hydraulic piston, and the first The three-fluid path has a third radial passage in the hydraulic piston and / or the fourth fluid path does not have a radial passage in the hydraulic piston.

10‧‧‧ Door leaf

12‧‧‧door hinge

14‧‧‧ Door closer

16‧‧‧ Closure body

18‧‧‧ connecting rod

20‧‧‧ rail

22‧‧‧ closed hydraulic system

24‧‧‧Open hydraulic system

26‧‧‧ Closer shaft

28‧‧‧hydraulic piston

30‧‧‧shell

32‧‧‧ the first pressure chamber

34‧‧‧Second pressure chamber

36‧‧‧First fluid flow-regulating valve

37‧‧‧First through hole

38‧‧‧Second fluid flow-regulating valve

39‧‧‧Second through hole

40‧‧‧Third fluid flow-regulating valve

41‧‧‧Third through hole

42‧‧‧Fourth fluid flow-regulating valve

43‧‧‧Fourth through hole

44‧‧‧ cam disc

46‧‧‧Cam follower

48‧‧‧ damping spring

50‧‧‧ cover

52‧‧‧Safety Valve

54‧‧‧The first slot

56‧‧‧ the first radial channel

58‧‧‧Second slot

60‧‧‧Second radial channel

62‧‧‧The third slot

64‧‧‧ Third radial channel

66‧‧‧Shoulder

A‧‧‧First door corner closed area

B‧‧‧ Second door corner closed area

C‧‧‧ Third Door Corner Closed Area

D‧‧‧Fourth door corner closed area

E‧‧‧first fluid path

F‧‧‧Second fluid path

G‧‧‧Third fluid path

H‧‧‧Fourth fluid path

The above-mentioned preferred embodiments and features of the present invention can be arbitrarily combined with each other. Further details and advantages of the invention will be described below with reference to the drawings. It is shown in the figure: FIG. 1 shows a schematic diagram of a door leaf, which can be closed by a door closer in a door angle closed area of 180 °; FIG. 2 shows a schematic diagram of a closed area of the door closer; Sectional view of the closer of the door closer when the door is closed (ie, the door closing angle is 0 °); Figure 4 shows the door when the door is closed at the beginning of the first and second door angle closing areas, for example, the door closing angle is about 125 Section view of the closer body of the door closer when Figure °; Figure 5 shows a sectional view of the closer body of the door closer when the door leaf is closed at the end of the second door angle closing area, such as when the door closing angle is about 70 °; Figure 6 shows a sectional view of the closer of the door closer when the door is closed at the end of the first door angle closed area and at the beginning of the third door angle closed area, for example, when the door closing angle is about 15 °; and Figure 7 A sectional view of the closer of the door closer when the door is closed at the beginning of the fourth door angle closing area, for example, when the door closing angle is about 7 °.

In FIG. 1, a view of a door leaf (door leaf) 10 is schematically shown from above. The door leaf 10 is pivotally connected to the door frame through one or more door hinges 12. The door leaf 10 can be opened and closed in an area of about 180 °. By means of the door closer 14 and in particular when closing, the closing characteristics of the door leaf 10 can be set.

As shown in FIG. 1, the door closer 14 may be configured as, for example, a so-called sliding door closer. The door closer 14 has a closer body 16, a connecting rod 18 and a slide rail 20. The modular structure allows the closer body 16 to be combined with different slide rails 20.

In the embodiment shown, the closer body 16 is mounted on the door leaf 10 on the hinge side of the door leaf 10 relative to the door hinge 12. In other embodiments, the closer body 16 may also be mounted on the door frame (top-mounted) and / or on the opposite side of the hinge.

With the help of the closer body 16, different closing speeds and delays can be set according to the door closing angle during the closing of the door leaf 10. In other words, during the closing process, the door leaf 10 can be quickly closed in certain angular regions and slowly closed in certain angular regions.

In FIG. 1, four corner closing regions are schematically shown, for which different closing speeds and delays can be set by means of the closer body 16. In particular, the closing hydraulic system of the closer body 16 can be used to set the closing speed in the first door angle closing area A. Alternatively, a closing delay may be additionally set in the second door angle closed area B located within the first door angle closed area A. Following the first door angle closed area A, a third door angle closed area C can be set and within the third door angle closed area C, a fourth door angle closed area D can be set.

The closing hydraulic system of the door closer 14 can be configured such that it already functions from 180 °, or first from 125 ° or 120 °. The first door angle closed area A may extend, for example, between 125 ° and 15 °. In the first door angle closing area A, the basic closing speed of the door leaf 10 can be set. The second door angle closed area B may extend, for example, between 125 ° and 70 °. For example, the first and / or second door angle closed regions may also start earlier and / or end later. In the second door angle closed area B, an additional delay can be set if necessary. Thus, for example, sufficient time can be provided for luggage, strollers, beds, etc. to pass through the door. The third door angle closed area C may extend, for example, between 15 ° and 0 °. For example, the third door angle closing area C may be set so that the door leaf 10 can be closed almost silently. The fourth door angle closed area D may extend, for example, between 7 ° and 0 °. Here, the speed at the time of the final impact can be set so as to ensure that the door leaf 10 is surely closed, for example, by the elastic deformation of the door seal.

The four door corner closed areas A to D are again shown schematically in the diagram in FIG. 2. It should be emphasized here that, in particular, the door closer 14 of the present invention can only optionally set the second door angle closed area B. Without adjusting the second door angle closed area B, the door leaf 10 can be closed at a uniform speed in the first door angle closed area A. If necessary, a second door angle closing area B may be additionally added as a closing delay. With only the optional closing delay in the second door angle closing area B, the basic setting of the door closer 14 can be implemented more easily and in particular faster.

In this case, it should also be emphasized that the door angle closed areas A and B influence each other. That is, the setting of the closing speed in the first door angle closing area A indicates the initial speed for delay in the second door angle closing area B. Specifically, a plurality of regulating valves are provided for setting four door angle closed areas A to D, as described in detail below with reference to FIGS. 3 to 7 attached.

FIG. 3 shows a longitudinal sectional view of the closer body 16 in the closed state of the door leaf 10. The closer body 16 includes a closing hydraulic system (damping hydraulic system) 22 for affecting the closing characteristics of the door leaf 10, and an opening hydraulic system 24 for affecting the opening characteristics of the door leaf 10, which are not described in detail here.

The closing hydraulic system 22 has a closer shaft 26, a hydraulic piston 28, a housing 30, a first pressure chamber (damping chamber) 32, and a second pressure chamber 34. Additionally, the closed hydraulic system 22 has four regulating valves 36, 38, 40, and 42 for regulating fluid flow.

The closer shaft 26 is connected to the slide rail 20 through a link 18 (see FIG. 1). The closer shaft 26 is rotatably supported in the housing 30. The closer shaft 26 has a cam disc 44. The cam disc 44 may be formed in a heart shape, for example.

A hydraulic piston 28 is provided in the housing 30 in a reciprocating manner. The hydraulic piston 28 defines a first pressure chamber 32 and a second pressure chamber 34. The movement of the hydraulic piston 28 changes the volumes of the first pressure chamber 32 and the second pressure chamber 34. The hydraulic piston 28 has a cam follower 46, such as a rotatable roller, for following the cam profile of the cam disc 44. The hydraulic piston 28 is supported by a cover 50 via a damping spring 48, which is fixed to the housing 30.

The hydraulic piston 28 includes a safety valve (check valve) 52. When the door is opened, the hydraulic piston 28 moves in the direction of the closer shaft 26 (to the right in FIG. 3), the safety valve 52 opens, and the fluid flows from the second pressure chamber 34 into the first pressure chamber 32. When the door is closed, the hydraulic piston 28 is moved away from the closer shaft 26 (to the left in FIG. 3) by the cam disc 44. The safety valve 52 is closed. The fluid flows from the first pressure chamber 32 into the second pressure chamber 34 via at least one of the plurality of fluid paths according to the current door closing angle. By specifically affecting the fluid flow in the fluid path, the desired closing characteristics of the door can be set.

The regulating valves 36, 38, 40, 42 are received in the through holes 37, 39, 41, 43 in the housing 30. For example, the first regulating valve 36 is provided in the first through hole 37. The through holes 37, 39, 41, 43 are connected to the opposite longitudinal outer sides of the housing 30 of the closer body 16. The regulating valves 36, 38, 40, 42 can be adjusted from both sides of the through holes 37, 39, 41, 43. This increases the installation possibilities of the closer body 16 and therefore the flexibility of the door closer 14.

FIG. 4 shows a dotted fluid path F (also referred to herein as a second fluid path), which connects the first pressure chamber 32 and the second pressure chamber 34 in the second door angle closed area B (see section 1 And 2 images). The start, width and end of the second door angle closed area B are preset by the positioning and length of the second groove 58 in the hydraulic piston 28. Through the second groove 58, the fluid flow is guided by the first and second fluid flow-regulating valves 36, 38 into a radial passage 60 of the hydraulic piston 28 to the second pressure chamber 34. In particular, the second fluid path F has a first fluid flow-regulating valve 36 and a second fluid flow-regulating valve 38. In the second fluid path F, the first fluid flow-regulating valve 36 and the second fluid flow-regulating valve 38 are connected in series. The second fluid flow-regulating valve 38 is disposed downstream of the first fluid flow-regulating valve 36.

FIG. 5 shows the first fluid path E in dotted lines. The first fluid path E connects the first pressure chamber 32 and the second pressure chamber 34 in a section of the first door angle closed area A, and the section of the first door angle closed area is not connected to the second door angle closed area B intersects (see Figures 1 and 2). The start, width and end of the first door angle closed area A are preset by the positioning and length of the first groove 54 in the hydraulic piston 28. Through the first groove 54, the fluid flow is guided by the first fluid flow-regulating valve 36 into a first radial channel 56 of the hydraulic piston 28 to the second pressure chamber 34. In particular, the first fluid path E has a first fluid flow-regulating valve 36. In contrast to the second fluid path F, the first fluid path E does not have a second fluid flow-regulating valve 38.

Therefore, by setting the first fluid flow-regulating valve 36, the closing speed of the door leaf 10 in the first door angle closing area A can be set. If the second fluid flow-regulating valve 38 is not regulated, the closing speed set by the first fluid flow-regulating valve 36 is maintained in the second door angle closed region B, wherein the second fluid path F is passed through. The second fluid flow-regulating valve 38 does not throttle the fluid flow in the initial position. However, the second fluid flow-regulating valve 38 may also be adjusted away from the initial position. An additional closing delay can then be set in the second door angle closing region B by adjusting the second fluid flow-regulating valve 38.

Fig. 6 shows a third fluid path G in dotted lines. The third fluid path G connects the first pressure chamber 32 and the second pressure chamber 34 in the third door angle closed area C (see FIGS. 1 and 2). Through the third groove 62, the fluid flow is guided from the third fluid flow-regulating valve 40 into the third radial passage 64 of the hydraulic piston 28 to the second pressure chamber 34.

FIG. 7 shows a third fluid path G and a fourth fluid path H with a dotted line. In addition to the third fluid path G, the fourth fluid path H connects the first pressure chamber 32 and the second pressure chamber 34 in the fourth door angle closed region D (see FIGS. 1 and 2). The start, width and end of the third door angle closed area C are preset by the positioning and length of the shoulder 66 on the hydraulic piston 28. In the fourth fluid path H, the third fluid flow-regulating valve 40 is bypassed (not flowed through). Through the shoulder 66, the fluid flow is directed from the fourth fluid flow-regulating valve 42 to the second pressure chamber 34.

The invention is not limited to the preferred embodiments described above. On the contrary, various modifications and changes are possible, and these modifications and changes also make use of the concept of the present invention and thus fall into the protection scope of the present invention. In particular, the present invention also claims the subject matter and features of the dependent patent scope independently of the cited patent scope. In particular, the features of the dependent patent scope are also independent of all features of the independent patent scope of item 1 and, for example, independent of the independent patent scope of item 1 concerning closed hydraulic systems, first fluid path, second fluid The features of the path, the existence and configuration of the first regulating valve and / or the second regulating valve are disclosed.

Claims (15)

    A door closer (14) for a door leaf (10), in particular a slide rail type door closer, wherein the door closer (14) has a closing hydraulic system (22) for setting the closing speed of the door leaf (10) , Wherein the closed hydraulic system (22) has: a first fluid path (E), the first fluid path (E) has a first fluid flow-regulating valve (36), and the door leaf (10) During the closing in the first door angle closing area (A) of the door closer (14), a fluid flow flows through the first fluid flow-regulating valve (36); and a second fluid path (F), the second The fluid path (F) has the first fluid flow-regulating valve (36) and the second fluid flow-regulating valve (38), at the door leaf (10) at a second door angle of the door closer (14) During the closing in the closed area (B), a fluid flow flows through the first fluid flow-regulating valve (36) and the second fluid flow-regulating valve (38), wherein by means of the second fluid flow-regulating valve (38) A change in the closing speed of the door closer (14) in the second door angle closing area (B) relative to the first door angle closing area (A) can be set, especially a closing delay.         The door closer (14) according to item 1 of the scope of patent application, wherein: the second door angle closed area (B) is located in the first door angle closed area (A); and / or in the first In the two-fluid path (F), the second fluid flow-regulating valve (38) and the first fluid flow-regulating valve (36) are connected in series.         The door closer (14) according to item 1 or 2 of the scope of patent application, wherein: the first door angle closed area (A) and the second door angle closed area (B) have a common starting point; and / Or the second door angle closed area (B) is smaller than the first door angle closed area (A).         The door closer (14) according to any one of the foregoing patent applications, wherein: the closed hydraulic system (22) has a first pressure chamber (32) and a second pressure chamber (34); the first fluid The path (E) divides the first pressure chamber (32) and the second door in a section of the first door angle closed area (A) that does not intersect the second door angle closed area (B). The pressure chamber (34) is fluidly connected; and the second fluid path (F) connects the first pressure chamber (32) and the second pressure chamber (34) in the second door angle closed area (B). ) Fluid connection.         The door closer (14) according to any one of the foregoing patent applications, wherein: the door closer (14) can be set to be closed at the first door angle by means of the first fluid flow-regulating valve (36). The closing speed in the area (A) and the second door angle closing area (B).         The door closer (14) according to any one of the aforementioned patent applications, wherein: the first door angle closing area (A) starts in a region between a 180 ° closing angle and a 120 ° closing angle and / or Ends in a region between a 30 ° closure angle and a 10 ° closure angle; and / or the second door angle closure area (B) begins in a region between a 180 ° closure angle and a 120 ° closure angle and / or It ends in the area between the 90 ° closing angle and the 60 ° closing angle.         The door closer (14) according to any one of the foregoing patent applications, wherein the first fluid path (E) and the second fluid path (F) have A common fluid path section upstream of the valve (36).         The door closer (14) according to any one of the aforementioned patent application scopes, wherein: in the second fluid path (F), the second fluid flow-regulating valve (38) is provided at the first Fluid flow-downstream of the regulating valve (36).         The door closer (14) according to any one of the foregoing patent applications, wherein the closed hydraulic system (22) has a third fluid path (G) and the third fluid path (G) has a third Fluid flow-regulating valve (40), during which the door leaf (10) is closed in the third door angle closing area (C) of the door closer (14), fluid flow flows through the third fluid flow-regulating A valve (40); and / or a fourth fluid path (H), said fourth fluid path (H) having a fourth fluid flow-regulating valve (42), in said door leaf (10) in said door closer ( 14) During the closing period in the fourth door angle closing region (D), a fluid flow flows through the fourth fluid flow-regulating valve (42).         The door closer (14) according to item 9 of the scope of patent application, wherein the third door angle closed area (C) is connected to the first door angle closed area (A), and the fourth door angle The closed area (D) is located within the third door angle closed area (C).         The door closer (14) according to item 9 or 10 of the scope of patent application, wherein: the third door angle closing area (C) starts in a region between a 30 ° closing angle and a 10 ° closing angle and / or End at a closing angle of 0 °; and / or the fourth door angle closing area (D) starts in a region between a closing angle of 15 ° and a closing angle of 5 ° and / or ends at a closing angle of 0 °.         The door closer (14) according to any one of the aforementioned patent applications, wherein the closed hydraulic system (22) further has a housing (30) having a plurality of through holes ( 37, 39, 41, 43), the first fluid flow-regulating valve (36), the second fluid flow-regulating valve (38), the third fluid flow-regulating valve (40), and the A fourth fluid flow-regulating valve (42) is received in the through hole (37, 39, 41, 43), wherein the first fluid flow-regulating valve (36), the second fluid flow-regulating valve (38) The third fluid flow-regulating valve (40) and the fourth fluid flow-regulating valve (42) are configured so that the corresponding through holes (37, 39, 41, 43) The first fluid flow-regulating valve (36), the second fluid flow-regulating valve (38), the third fluid flow-regulating valve (40), and the first Four fluid flow-regulating valve (42).         The door closer (14) according to any one of the foregoing patent application scopes, wherein the closing hydraulic system (22) further has a closer shaft (26) rotatably supported, the closer shaft (26) ) Has a cam disc (44); a hydraulic piston (28), said hydraulic piston (28) has a cam follower (46), said cam follower (46) follows said cam disc (44); and a housing A body (30) in which the hydraulic piston (28) is guided between a first pressure chamber (32) and a second pressure chamber (34).         The door closer (14) according to item 13 of the scope of patent application, wherein the first fluid path (E) has a first groove (54) in the hydraulic piston (28), and the first groove (54) preset the start and length of the first door angle closed area (A); and / or the second fluid path (F) has a second groove (58) in the hydraulic piston (28) , The second groove (58) presets the start and length of the second door angle closed area (B); and / or the third fluid path (G) has a position in the hydraulic piston (28) A third groove (62), the third groove (62) presets the start and length of the third door angle closed area (C); and / or the fourth fluid path (H) has a hydraulic piston ( 28) on the shoulder (66), said shoulder (66) presetting the start of the fourth door angle closed area (D).         The door closer (14) according to claim 13 or 14, wherein: the first fluid path (E) has a first radial passage (56) in the hydraulic piston (28); and / Or the second fluid path (F) has a second radial passage (60) in the hydraulic piston (28); and / or the third fluid path (G) has a hydraulic piston (28) The third radial passage (64) in 28); and / or the fourth fluid path (H) does not have a radial passage in the hydraulic piston (28).