EP2435652B1 - Valve for a hydraulic door closer - Google Patents

Description

The invention relates to a valve of a hydraulic door operating device, that is to say of a hydraulic door closer or rotary vane drive according to the preamble of claim 1. GB-A-2254653 discloses a valve having the features according to the preamble of claim 1.

From the DE 10 2005 030 696 A1 For example, a hydraulic door drive is known in which a solenoid valve is used to allow the closing of the door in case of fire. However, this requires a sensor for detecting the door opening angle and a control electronics for driving the solenoid valve, which is expensive and has a relatively complex structure result.

Further, in such door operators, it is sometimes necessary to lock a door. In particular, in a double-wing revolving door system, the active leaf must be found or prevented from closing, as long as the inactive leaf is still open so far that when closing the active leaf, the closing order - passive wing before the leaf - can not be met.

From the DE 100 23 760 A1 a locking device is known, which is electrically switched. In this case, a sensor circuit is used to control the locking device correctly. This again results in a relatively complex structure. In addition, the reliability of the locking device is impaired if the power supply to the locking device fails.

It is an object of the present invention to at least reduce the disadvantages of the prior art.

The solution of this object is achieved by the features of Ansprüchs. 1

According to the invention, a valve is provided in particular for blocking and / or damping a door movement in the hydraulic circuit of a door operating device, in particular a door closer or a rotary vane drive. Such a door operating device is thus set up to open and / or close a connected door. The door operating device has a housing. The valve is adapted to be used in the door operating device influencing the flow of hydraulic fluid of the door operating device, so it can block or release.

The valve according to the invention comprises a sleeve and a slider. The slider is guided longitudinally displaceably in the sleeve and biased by a return spring along the longitudinal displaceability. The slider has such a designed contact surface for hydraulic fluid that the hydraulic fluid can be urged against this contact surface. This contact surface is part of the slider or valve body, which is pressed by means of the return spring against a counter edge, which is formed in the sleeve of the valve. Ie. the contact surface is due to the effect of the return spring at the opposite edge liquid-tight and thus blocks the flow of hydraulic fluid. The slider is designed according to the invention to be acted upon mechanically from the outside against the action of the return spring. Ie. For example, when closing a connected door, the slider can be moved by a working piston of the door actuating device in the direction of the return spring are pressed so that the contact surface is lifted from the opposite edge and thus the blockage of the flow of hydraulic fluid is at least partially canceled. Ie. the slider is designed to be mechanically acted upon from the outside by the opposite edge against the action of the return spring. Due to the spring-loaded mounting of the slider, it is automatically pressed back towards the counter edge with decreasing mechanical loading of the return spring, so that it can finally be liquid-sealing again by means of its contact surface at the opposite edge when the mechanical loading is less than the force of the return spring or no longer exists.

The insertion of the valve into the housing of the door operating device makes it possible to mount the valve in the already assembled door operating device and, if necessary, remove it again and exchange it, for example.

In the sleeve, both the valve body and the return spring are preferably accommodated.

The dependent claims have advantageous developments of the invention to the content.

Preferably, the slider is formed with a return spring facing away from the sleeve protruding. This has the advantage that in the case of the working piston whose movement can be limited in the direction of return spring, for example by the sleeve. Ie. the slider can only be moved far in the direction of the return spring until it is flush with the sleeve. In that case, mechanical actuating means, such as the aforementioned working piston, are possible whose Outside dimensions go beyond the slider. This is the case in particular in the case of working pistons of hydraulic door actuation devices, which are moved in their respective housing in a liquid-tight manner along the inner wall thereof. As a result, additional security measures to limit the path of movement are not required.

In particular, a distance between the slide and the sleeve, through which the hydraulic fluid must flow, be dimensioned such that the flow of hydraulic fluid is still obstructed when the opposite edge is lifted. As a result, an opening and / or closing damping in the connected door is possible in a simple manner.

The abutment surface is inclined at an angle to the longitudinal displaceability of the slider. As a result, a kind of run-on slope for the hydraulic fluid is created. This results in the advantage that the counter edge and run-up slope along a straight line or curve abut one another, so to speak, always point-to-point, which results in a better or easier-to-achieve sealing effect compared to a flat support. Preferably, the angle is pointed in the direction of the slide or valve body and is advantageously about 60 °.

The slider preferably has on a side facing the sleeve a recess which is delimited on one side by the contact surface, extends along the longitudinal displaceability of the slide, with the sleeve enclosing a preferably hollow cylindrical cavity and being hydraulically connected to the hydraulic connection of the sleeve. The recess has the advantage that the slide along the longitudinal extent the sleeve can move without the liquid exchange between the slide and sleeve is interrupted.

The valve further comprises a mounting block in which the sleeve is inserted and which is adapted to be fixedly inserted into the hydraulic door operating device. The mounting block thus serves to fasten the valve according to the invention in the door operating device. Ie. the mounting block forms the stationary with respect to the housing of the door operating device arranged part of the valve.

The mounting block preferably also has a recess on a side facing the housing of the door operating device, which extends along the direction of insertion of the fastening block in the housing of the door operating device, with the housing of the door operating device again a preferably hollow cylindrical cavity and with both Hydraulic line of the mounting block as well as hydraulically connected to a hydraulic line of the housing. The recess has the advantage that the mounting block can be used in door actuation devices whose hydraulic lines to be connected to the valve are possibly located at a different location with respect to the valve and are nevertheless hydraulically connected to the recess of the mounting block. As a result, the range of application of the valve is extended, and this is therefore universally applicable.

The valve according to the invention further comprises an adjustment section, which is arranged longitudinally movable in the mounting block and is in engagement with the sleeve such that it entrains the sleeve during a longitudinal movement in the mounting block. This can change the position of sleeve and slides are set within the mounting block to the respective door operator. For example, the slider is actuated by a working piston of the door operating device. The working piston is now in relation to the mounting block further inside in the door operating device, the arrangement consisting of slide and sleeve can be moved in the direction of working piston, although the mounting block does not change its position. In addition, as described above, the sleeve may limit the path of travel of the mechanical biasing member of the door operator. By adjusting or moving the sleeve in the mounting block so that the movement of this Beaufschlagungselements is adjustable. This also extends the range of application of the valve, and this is therefore universally applicable.

The adjusting section is arranged freely rotatable in the mounting block. Thereby, it is possible to move the adjusting portion by rotating with respect to the mounting block in the interior of the door operating device or in the reverse direction, for example using a screwdriver, which simplifies the operability of the valve.

The sleeve preferably has, on a side facing the attachment block, again a recess which extends along the longitudinal movement of the adjustment section, encloses a cavity with the attachment block and is hydraulically connected both to the hydraulic connection of the sleeve and to a hydraulic line of the attachment block. The recess has the advantage that the sleeve by means of of the adjustment portion can be moved within the mounting block, without the flow of liquid between the sleeve and mounting block is interrupted. This also serves the universal applicability of the valve according to the invention.

Preferably, one of the previously described recesses is formed circumferentially. This creates between the respective recess and the immediately adjacent part a hollow cylindrical cavity. This has the advantage that the part can be rotated with the recess in each adjacent part, without the respective hydraulic connection is lost. Ie. Hydraulic connection remains independent of the rotational position of the part with the recess and is thus always guaranteed, which increases the reliability.

The slider preferably further includes a through hole hydraulically connected to a gap between the slider and the sleeve and extending toward an actuator of the door operating device or a closing sequence control device. The passage opening directs the flow of liquid between said space in which the run-up surface may be located and an outside of the valve. The outside is a different location than that at which the mounting block is hydraulically connected to the housing of the door operator.

The slide has, at an end facing away from the intermediate space, preferably a continuous recess or opening, which extends substantially transversely to the longitudinal displaceability of the slide and is designed to be continuous from the passage opening. As a result, a fluid channel is created, which is the fluid exchange between Passage opening and door operating device also guaranteed in exemplary fitting to the slide working piston of the door operating device, which increases the reliability. Ie. in the case of opening this is easy to produce by drilling.

Preferably, the sleeve also has, at an end remote from the intermediate space, a continuous recess or opening which extends substantially parallel to the longitudinal extension of the continuous recess or opening on the slider. As a result, a fluid channel is created in the sleeve, which ensures the fluid exchange between the slide and door operating device even in example now also applied to the sleeve working piston of the door operating device, which further increases the reliability.

A door operating device according to the invention is set up to hydraulically open and / or close a connected door. The door operating device comprises a housing, a hydraulic circuit by which hydraulic fluid is forced to move when the door operating device performs an opening or closing movement, and one of the valves described above. The valve is inserted into the hydraulic circuit of the door operator so as to block the flow of hydraulic fluid in the hydraulic circuit due to the action of the return spring. The slider of the valve is mechanically urged by an actuator, such as a working piston, the door operating device in the opening or closing movement and thus urged away from the opposite edge in the direction of return spring or forced.

Fig. 1

eine schematisch vereinfachte Darstellung einer Hälfte des Ventils gemäß einem zweiten Ausführungsbeispiel der Erfindung, in einer ersten Schaltstellung im Schnitt,

Fig. 2

eine der Fig. 1 entsprechende Darstellung des Ventils in einer zweiten Schaltstellung und einer etwas abgewandelten Form,

Fig. 3

eine der Fig. 1 entsprechende Darstellung des Ventils in einer dritten Schaltstellung und einer wiederum etwas abgewandelten Form,

Fig. 4

ein Ventil gemäß einem zweiten Ausführungsbeispiel der Erfindung im Schnitt und

Further details, advantages and features of the present invention will become apparent from the following description of several embodiments with reference to the drawing. Show it:

Fig. 1

a schematically simplified representation of a half of the valve according to a second embodiment of the invention, in a first switching position in section,

Fig. 2

one of the Fig. 1 corresponding representation of the valve in a second switching position and a slightly modified form,

Fig. 3

one of the Fig. 1 corresponding representation of the valve in a third switching position and in turn a slightly modified form,

Fig. 4

a valve according to a second embodiment of the invention in section and

In the Fig. 1 to 3 In each case, a valve 1 according to a first embodiment of the invention is shown in simplified form, with only the upper half, which is visible in the figures, the half of the valve visible above a longitudinal axis L, hereinafter referred to as valve 1, being shown.

The valve 1 accordingly has a sleeve 2, in which a slide 3 is guided. The slider 3 is in this case by a return spring 4 in a Direction biased parallel to the longitudinal axis L of the sleeve 2 and thereby pressed against a counter edge 6, which is formed within the sleeve 2 at this.

The slider 3 has for this purpose a contact surface 5, which according to the in Fig. 3 angle indication α is arranged inclined to the longitudinal axis L. The slider 3 comes due to the action of the return spring 4 with its contact surface 5 at the opposite edge 6 liquid-tight to the plant. Ie. The blocking effect of the valve 1 is created by the sealing effect between the contact surface 5 and the counter edge. 6

The sleeve 2 also has a hydraulic port 7, which is formed in the example case as a sleeve 2 completely cross-flow channel. The hydraulic port 7 is connected via an outside recess 8 of the sleeve 2, a line section 9 of a mounting block 10 and a further recess 11 now of the mounting block 10 hydraulically connected to a hydraulic line 12 which leads to a hydraulic source not shown in the figures. The hydraulic channel 12 is preferably formed in a housing 13 of a door operating device, not shown, ie a door closer or rotary vane drive, since the valve 1 is connected in the installed state in the hydraulic circuit of such door actuation devices.

By an arrow ÖF the normal flow direction of a hydraulic fluid H of the door operating device in the valve 1 is shown. The flow direction ÖF preferably corresponds to an opening direction of the door operating device or the connected door, in which the valve 1 blocks the flow of liquid. This is useful, for example, so that a maximum opening angle of the connected door is never exceeded. If he were exceeded, this could lead to the door operating device is damaged or, for example, collides with a wall.

In the Fig. 1 to 3 is marked with H arrows the flow direction of the hydraulic fluid H symbolized, which is introduced or initiated by the hydraulic port 7 in an outside recess 14 of the slider 3 in the case when the connected door or the door operating device performs a closing movement by way of example. By introducing the hydraulic fluid H into the recess 14, the hydraulic fluid H is forced onto the contact surface 5.

Im in Fig. 2 shown state in which the door is opened by way of example, the liquid flow through the cavity between the slide 3 and sleeve 2 is relatively low or absent. Ie. the usually closing spring of the door operating device can initiate the closing process with its entire force, which is advantageous in terms of the necessary initial acceleration of the door.

With progressive movement of the door and the associated movement of an exemplified as a piston 24 actuating device of the door actuating device away from the valve 1, the contact surface 5 of the slider 3 by the return spring 4 is always moved towards the opposite edge 6. How very good in Fig. 3 to recognize, the cavity between the slide 3 and sleeve 2 in the region of the opposite edge 6 is relatively narrow. This narrowness hinders the fluid flow and thus leads to a relatively slow movement speed of the door. Thus, the exemplary closing speed is hindered at the end of the closing movement, resulting in a closing damping.

The valve 1 can of course also be used so that the piston 24, the thrust surface 5 of the opposite edge 6 pushes away when the door is closed. In that case, an opening damping is achieved at the end of the door opening movement.

As in particular in Fig. 2 shown, the valve 1 preferably has a screw portion 15, for example in the form of a hexagon socket screw head. On an outer circumference, the screw portion 15, at least in sections, preferably has an externally threaded portion 15a, by means of which it is screwed into an internally threaded portion 10a formed in the mounting block 10. In order for hydraulic fluid to not be able to escape through this screw connection, the screw section 15 may preferably have an outer circumferential groove 15b into which a seal 16, for example in the form of an O-ring, is inserted. The seal 16 is thus used liquid-tightly between the mounting block 10 and screw portion 15 by being advantageously formed elastically and clamped between the groove 15 b and the opposite inner surface of the mounting block 10.

A twisting of the screw portion 15 leads to a translational movement of the screw portion 15 within the mounting block 10 along the longitudinal axis L.

The sleeve 2 is received, for example via a spring-groove connection preferably in the housing 13 of the door operating device against rotation. As exemplified in Fig. 2 To recognize, the housing 13 for this purpose on a projection 13 b, which extends along the longitudinal axis L and protrudes in the direction of the sleeve 2. The sleeve 2 in turn has a preferably groove-like guide in the form of a rail or Guide recess 2d on. As a result, the guide recess 2d can only move translationally along the projection 13b and thus the sleeve 2 in the fastening block 10, in accordance with FIG Fig. 2 to the right and to the left. A further advantage of this linear guide for the sleeve 2 is that the hydraulic line 9 and the hydraulic connection 7 can change their positions relative to one another only along a single straight line, here by way of example parallel to the longitudinal axis L, which increases operational reliability.

As in Fig. 3 shown, the linear guide of the sleeve 2 can also be done by the mounting block 10. For this purpose, the mounting block 10 opposite Fig. 1 and 2 Run extended and has, for example, a guide recess 10d, in which the sleeve 2 is guided longitudinally displaceable by means of a guide projection 2h formed on it along the longitudinal axis L.

At a portion of the sleeve 2 and the slider 3 remote from the screw portion 15, a receiving space for the return spring 4 is formed. For this purpose, preferably both the sleeve 2 inside and the slider 3 on the outside each circumferentially formed recesses 2a and 3a, respectively. As a result, a hollow-cylindrical cavity is formed between sleeve 2 and slider 3. Alternatively, the recess 3a is missing, and the recess 2a alone provides for this cavity or vice versa. In this cavity, the return spring 4 is inserted and supported with its screw portion 15 facing the end of a stop surface 2 b of the sleeve 2. Ie. the return spring 4 is formed by way of example by means of a helical spring. The stop surface 2b is advantageously formed by means of a recess 2 a limiting wall of the sleeve 2. With its end facing away from the screw portion 15, the return spring 4 is supported on a spring stop 17. The spring stop 17 is in the Fig. 1 shown example formed by means of a ring which is inserted in a circumferential groove 3b of the slider 3. The ring preferably has a rectangular cross section, so that it provides a good stop surface for the return spring 4. The groove 3b prevents the ring in Fig. 1 and 2 can move to the right or to the left.

Alternatively, the spring stopper 17 is supported only in the direction of the return spring 4, as in Fig. 2 illustrated, since the return spring 4 prevents movement of the spring stop 17 in the direction of return spring 4 due to their bias. In the example shown, the spring stop 17 is placed on the recess 3a, to which also the spring stop 17 is placed; there is no additional receptacle for the spring stop 17 is required.

Alternatively, the slider 3, as in Fig. 3 shown at the screw portion 15 facing away from an externally threaded portion 3f, on which the spring stopper 17 is screwed in the form of a nut or a ring with internal thread. This makes it possible to adjust the bias of the return spring 4 and thus their return effect. The ring advantageously has a non-circular cross-section outer contour, for example in the form of an external hex, so that the ring is rotated for example by means of an open-end wrench and translationally in the direction of stop surface 2b and away moves and thus the bias of the return spring 4 can be adjusted.

In order to reduce leakage losses in the direction of return spring 4 as far as possible, preferably, the slide 3 further comprises a circumferentially encircling groove 3c, in which a seal 18 analogous to the seal 16 used is and thus liquid-tight between sleeve 2 and slide 3 is arranged.

Further, the sleeve 2 preferably also on a side opposite to the screw portion 15 side of the hydraulic line 9 a circumferentially circumferential groove 2c similar to the grooves 3c, 15c, in which a seal 19 analogous to the seals 16, 18 is inserted and thus liquid-tight between Mounting block 10 and sleeve 2 is arranged.

Thus, the leakage losses between the housing 13 of the door operating device and the valve 1 are as low as possible, preferably seals 20, 21 are provided on both sides of the hydraulic channel 12, which are preferably clamped between the housing 13 and mounting block 10. For this purpose, the attachment block 10 preferably has peripherally circumferential grooves or recesses 10b, 10c at corresponding locations. But also the housing 13 may also have recesses or grooves 13a which now encircle the inner grooves in corresponding areas corresponding to the grooves 10b, 10c.

Preferably, the attachment block 10 in an area on the right and / or left side of the hydraulic line 9 to an outer diameter which is smaller than an inner diameter of the housing 3 in the associated area, whereby the recess 11 is formed. This results between mounting block 10 and housing 13 an exemplary hollow cylindrical cavity. This cavity allows the hydraulic line 9 not to be in alignment with the hydraulic line 12 to allow fluid flow. Rather, the hydraulic lines 9, 12 may be arranged offset to one another. This standardized valves are 1 possible, which can be used in variously designed door actuation devices, which helps reduce manufacturing costs.

So that the screw portion 15 can not only move the sleeve 2 in the direction of the door actuating device but also is able to move the sleeve 2 in the opposite direction, it has on the side facing the sleeve 2 a driver device.

Im in Fig. 1 As shown, the entrainment means is formed by means of a preferably annular entrainment portion 15c, which is formed in a direction preferably transversely to the longitudinal axis L and on the sleeve 2 to be protruding. The sleeve 2 has a recess 2e, which is preferably designed to be complementary to the driver section 15c. Ie. the driver portion 15c locked so to speak with the recess 2e. The driver portion 15c and the recess 2e are formed so that they can be brought in and / or disengaged from a predetermined force, which facilitates the (dis) assembly.

Alternatively, although not shown in the figures, the screw portion 15 has a recess 2e similar to the recess and the sleeve 2 to this recess substantially complementary projection.

Again alternatively, the cam portion 15c is as in FIG Fig. 2 shown formed by means of a projection which rests flat and clamped on the sleeve 2. Ie. the entrainment of the sleeve 2 by means of the screw 15 takes place by means of clamping or friction effect.

Again alternatively, the cam portion 15c is as in FIG Fig. 3 shown, also formed by a recess, so that between the recesses 2e and 15c, a cavity is formed. In this advantageously annular cavity, a driver part 23 is inserted and preferably has the shape of a ring.

The ring shape is advantageous because the screw portion 15 is rotated relative to the sleeve 2.

The function of the screw 15 is based on the Fig. 2 and 3 explained. Im in Fig. 2 shown state of the screw portion 15, the hydraulic fluid H coming from the hydraulic line 9 coming almost unhindered flow into the hydraulic port 7, since both are almost aligned. Im in Figure 3 shown state in which the screw portion 15 is further displaced in the direction of hydraulic line 9, the hydraulic fluid H, coming from the hydraulic line 9, first pass through a relatively narrow gap 22 between the mounting block 10 and sleeve 2 before it reaches the hydraulic port 7. As a result, the liquid flow is impeded to a considerable extent. As a result, the restoring spring 4 has to apply less force in order to press the contact surface 5 of the slide 3 in a liquid-tight manner against the opposite edge 6 of the sleeve 2. In addition, this restriction allows damping in the movement of the connected door leaf. Of course, the intermediate space 22 can be designed so that the liquid flow is hardly hindered or even impeded. As a result, a valve 1 is provided that can be adjusted in terms of damping and blocking effect. With the screw portion 15 thus a simple, externally accessible possibility is created to be able to adapt the valve 1 to the respective door operating device.

The screw portion 15 has another decisive advantage. The mounting block 10 is moved out only when inserted into the housing 13 and possibly at a Wiederentfernen out. Otherwise, the mounting block 10 is stationary with respect to the housing 13. This means that the seals 20, 21 slide along the housing to a negligible extent. Ie. they are subject to little or no mechanical closure, thus keeping very long. At least that looks different with the seal 18. During each opening and / or closing operation, the piston 24 shown in detail in the figures, for example working piston, presses the door actuating device against a stop face 3g of the valve body 3 and pushes it optionally in the direction of the screw section 15. As a result, the seal 18 slides with each movement of the valve body 3 along the facing contact surface of the sleeve 2 and is therefore exposed to relatively high wear. This results in that the seal 18 may need to be replaced. Due to the screw portion 15 now not the whole valve 1 but only the screw portion 15 with sleeve 2 and valve body 3 must be screwed out. This reduces maintenance and simplifies maintenance.

As Fig. 3 shows, the housing 13 is slightly modified. As can be seen, the housing 13 is substantially similar to the housing 13 in accordance Fig. 1 and 2 , However, the hydraulic line 12 is formed offset relative to these figures to the right. Here, the significance of the recess 11, which is preferably relatively wide along the longitudinal axis L, can be recognized. Because of this width, the valve 1 can be used in housing 13 with differently designed hydraulic lines 12, provided that the respective hydraulic line 12 is hydraulically connected with the valve 1 inserted with the recess 11 of the mounting block 2, so a Hydraulic fluid exchange between hydraulic line 12 and recess 11 is possible. Ie. the recess 11 improves the universal use of the valve. 1

Due to the operative connection between the contact surface 5 and the counter edge 6, a valve 1 which can be inserted and removed again in a simple manner into a door operating device is provided. Therefore, the valve 1 can be used both as a locking device and as a blocking device as part of a closing sequence control. In the case of the piston 24 is replaced by an unspecified actuator of this closing sequence control or forms this actuator, which can be actuated by a stand-wing-side door actuator, so then the poppet-side valve 1 blocks or releases the hydraulic fluid flow and thus a determination or release of the transition wing side Door actuator and thus the door causes.

As in Fig. 1 shown, the hydraulic fluid H flows either coming from the hydraulic line 12 via an existing between the sleeve 2 and slide 3 gap 25 and a continuously formed within the slide 3 passage opening 3d in the direction of piston 24 and in the reverse direction. The passage opening 3d serves to pass the hydraulic fluid H from the outside in the direction of the recess 14 or vice versa. Is the piston 24 in the in Fig. 2 shown position, it may be that it rests flat against him opposite outer surfaces 2f of the sleeve 2, so that the hydraulic flow is either greatly impaired or blocked in this area. To avoid this, the piston according to Fig. 1 By way of example, a through opening 24a, which is formed with respect to the passage opening 3d such that the hydraulic fluid H can flow therethrough. The Flow of the hydraulic fluid H through the piston 24 is indicated by a double arrow.

Alternatively, the piston 24, as in Fig. 3 shown, a groove-like recess 24b, through which the hydraulic fluid H from the through hole 3d coming laterally out of the piston 24 is guided or coming from the side of the piston 24 through the recess 24b through to the passage opening 3d, as also by means of a double arrow indicated.

Alternatively, the slider 3 on the end facing the piston 24, as in Fig. 2 have a recess 3e formed analogous to the recess 24b. Additionally or alternatively, the sleeve 2 at the end facing the piston 24, as also in Fig. 2 shown, having a recess 24b analogously formed recess 2g. The liquid flows through the slide 3 and the sleeve 2 in this end region are again indicated by double arrows. This embodiment allows the use in door actuation devices with completely sealing piston 24, which increases the application areas.

As in particular in Fig. 1 to recognize the attachment block 10 preferably has an externally threaded portion 10e, by means of which it is screwed into a complementarily formed female threaded portion 13c of the housing 13 of the door operator. For this purpose, also the attachment block 10 preferably has a screw portion 10f, which preferably has a non-circular outer contour, for example in the form of an external hexagon. As a result, the fastening block 10 can be firmly screwed to the housing 13 in a simple manner, for example by means of a ring key. Ie. the mounting block 10 sets the valve 1 in the door actuator, whereas the screw 15 in conjunction with the sleeve 2, the adaptation of the valve to the door operator, as described above, allows. As further in the Fig. 1 to 3 can be seen, the screw 10f transverse to the longitudinal axis L has an outer dimension which is greater than an outer dimension of the male threaded portion 10e. As a result, a stopper is formed so that the screw portion 10f can not be moved too far into the housing 13 in the female threaded portion 13c of the housing 13 and thus the mounting block 10. In addition, the screw 10f simplifies the assembly, since this only has to be screwed tightly without having to pay attention to any dimensions.

Fig. 4 shows a valve 1 according to a second embodiment of the invention in section analogous to Fig. 1 to 3 , It differs from the preceding embodiments essentially by the other arrangement of the return spring 4. This is arranged biased in the gap 25 between the valve body 3, sleeve 2 and screw 15 along the longitudinal displacement of the valve body 3 in the direction of the screw portion 15 away. Ie. the return spring 4 pushes back the valve body 3, so its contact surface 5, against the opposite edge 6 of the sleeve 2nd D. h. the spring stop 17 and the recesses 2a and 3a can be omitted. Therefore, the valve body 3 and sleeve 2 can be made substantially shorter than in the variants described above. The other design of the valve 1 is carried out according to the above-described embodiments. Exemplary shows Fig. 4 the design according to Fig. 3 ,

Instead of the above-described screw connection between the mounting block 10 and the housing 13 can between them a pressing, a Locking or a permanent connection, for example by means of gluing, be provided.

The hydraulic lines 9, 12 and the hydraulic port 7 may each be only one or more times, in cross-section of the sleeve 2, radiating, so that their extension straight line approximately in the middle of the valve 1, so meet on the longitudinal axis L shown in the figures. This is especially true with circumferentially formed recesses

In addition to the written disclosure of the invention is hereby explicitly on their graphic representation in the Fig. 1 to 3 directed.

As a result, a universally applicable and easy to assemble and adaptable to the particular operating conditions valve for a hydraulic door actuation device provided purely by means already existing in the door actuator elements only in one direction to release the hydraulic flow must be operated purely mechanically and automatically the lock - Can reach or blocking position, ie without the involvement of any additional elements from the outside. Ie. The invention provides an adjustable check valve for use in hydraulic door operators.

LIST OF REFERENCE NUMBERS

1

Valve

2

shell

2a

recess

2 B

spring stop

2c

groove

2d

guide recess

2e

recess

2f

outer surface

2g

recess

2h

guide projection

2i

Externally threaded section

3

valve body

3a

recess

3b

groove

3c

groove

3d

Through opening

3e

recess

3f

Externally threaded section

3g

stop surface

3h

blind

4

Return spring

5

approach surface

6

counter-edge

7

hydraulic connection

8th

recess

9

hydraulic line

10

mounting block

10a

Internally threaded portion

10b

groove

10c

groove

10d

guide recess

10e

Externally threaded section

10f

screw

10g

Internally threaded portion

11

recess

12

hydraulic line

13

casing

13a

groove

13b

guide projection

13c

Internally threaded portion

14

recess

15

screw

15a

Externally threaded section

15b

groove

15c

driver portion

16

poetry

17

spring stop

18

poetry

19

poetry

20

poetry

21

poetry

22

gap

23

driver part

24

piston

24a

Through opening

24b

recess

25

gap

ÖF

Opening direction / oil flow direction

L

longitudinal axis

H

hydraulic fluid

α

Angle of the contact surface 5 to the longitudinal axis L.

Claims (10)

1. A valve (1) for a hydraulic door actuating device, wherein

   • the door actuating device

   - is adapted to open and/or to close a connected door, and

   - includes a housing (13), and

   • the valve (1)

   - is adapted to be inserted into the housing (13) of the door actuating device, while influencing a flow of hydraulic fluid (H) in the door actuating device, and includes

   - a bushing (2),

   - a slider (3) or a valve body, which

   o is longitudinally guided within the bushing (2),

   o is pre-tensioned by a return spring (4) along the longitudinal displaceability of the bushing (2),

   o has a stop face (5), by means of which, on account of the action of the return spring (4), the slider, in a fluid sealing manner, bears against a counter-edge (6), which is configured at the bushing (2), and thereby blocks the flow of hydraulic fluid (H), and

   - and the slider is configured to be mechanically charged from the outside against the action of the return spring (4) and away from the counter edge (6).

   - an attachment block (10),

   o into which the bushing (2) is inserted, and

   o which is configured to be stationarily inserted into the door actuating device, as well as

   - comprises an adjusting portion (15), which

   o is disposed to be longitudinally movable within the attachment block (10) and disposed to be freely rotatable,

   o is in engagement with the bushing (2) in such a way that, upon its longitudinal movement in the attachment block (10), the bushing (2) is entrained such that a position of bushing (2) and slider (3) within the attachment block (10) is adjustable to the respective door actuating device,

   characterized in that the stop face (5) is disposed at an angle (α), which in the direction of the slider (3), respectively of the valve body, is acute and amounts to approximately 60 °, and is disposed to be inclined with regard to the longitudinal axis (L) such that the counter-edge (6) and the stop face (5) always punctually touch each other along a straight line or a curve.
2. The valve (1) according to claim 1, characterized in that the slider (3), with an end oriented way from the return spring (4), is configured to protrude from the bushing (2).
3. The valve (1) according to any of the preceding claims, characterized in that at a side oriented towards the bushing (2), the slider (3) has a recess (14), which

   • is delimited at one side by the stop face (5),

   • extends along the longitudinal displaceability of the slider (3), such that the slider (3) together with the bushing (2) encloses a hollow space, and

   • is hydraulically connected to the hydraulic connection (7) of the bushing (2).
4. The valve (1) according to any of the preceding claims, characterized in that at a side oriented towards the housing (13) of the door actuating device, the attachment block (10) has a recess (11), which

   • extends in the housing (13) of the door actuating device along an inserting direction of the attachment block such that the attachment block (10) together with the housing (13) encloses a hollow space, and

   • is hydraulically connected to both the hydraulic line (9) of the attachment block (10) and to the hydraulic line (12) of the housing (13).
5. The valve (1) according to any of the preceding claims, characterized in that, at a side oriented towards the attachment block (10), the bushing (2) has a recess (8), which

   • extends along the longitudinal displaceability of the adjusting section (15) such that the bushing (2) together with the attachment block (10) encloses a hollow space, and

   • is hydraulically connected to both the hydraulic connection (7) of the bushing (2) and to a hydraulic line (9) of the attachment block (10).
6. The valve (1) according to claim 3, 4 or 5, characterized in that at least one recess (8, 11, 14) is configured to be circumferential.
7. The valve (1) according to any of the preceding claims, characterized in that the slider (3) has a through opening (3d), which

   • is hydraulically connected to an interspace (25) between the counter-edge (6) of the slider (3) and the bushing (2), and

   • extends in the direction of an actuating element (24) of the door actuating device or of a closing sequence control device.
8. The valve (1) according to claim 7, characterized in that, at an end oriented away from the interspace (25), the slider (3) has a recess or opening (3e), which essentially extends transversely to the longitudinal displaceability of the slider (3), and is configured to be continuous, while leading away from the through-opening (3d).
9. The valve (1) according to claim 8, characterized in that, at an end oriented away from the interspace (25), the bushing (2) has a recess or an opening (2g), which essentially extends parallel to the longitudinal extension of the recess (3e), is configured to be continuous and is hydraulically connected to the recess, respectively to the opening (3e).
10. A door actuating device,

    • adapted to hydraulically open and/or to close a connected door, and

    • including

    - a housing (13),

    - a hydraulic circuit through which hydraulic fluid is forced to move, when the door actuating device performs an opening movement, respectively a closing movement, and

    - a valve (1) according to any of the preceding claims,

    o which is incorporated into the hydraulic circuit of the door actuating device in such a way that, on account of the action of the return spring (4), it blocks the flow of hydraulic fluid (H) in the hydraulic circuit, and

    o the slider (3) thereof is mechanically charged by means of an actuating device (24) of the door actuating device during the opening movement or closing movement thereof, and is therefore urged to move away from the counter-edge (6) in the direction of the return spring (4).

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