DE2048950A1 - Damping device, in particular for sliding doors - Google Patents

Description

2048850

Carl Ischebeck, 5828 Ennepetal-Voer & e, Milsper Str. 119

Damping device, in particular for sliding doors.

The invention relates to a device for damping both the opening and the closing movement, primarily of a sliding door equipped with a closing drive, for example an elevator door or the like. _i with a pressure medium damping cylinder which is expediently built into the locking rod and which interacts with end position stops and which has a piston rod section acting in the sense of door damping on each of the two opposite end faces.

Damping devices of the type described at the outset Genus are, for example, through prior public use Has become so known that two independently within a common pressure medium damping cylinder working from each other and each in the sense of one

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automatic return spring-loaded damping piston are provided. When the door is opened as well as when it closes, one of the two damping pistons in the sense of door damping, where ^ at the same time with this damping movement each one Return spring is tensioned. As a result, in the fully retracted position, each damping basket this is fully loaded in this end position by the return spring in the sense of a retraction is.

The effect of this restoring force has, however, in particular on the damping side of the device proved to be disadvantageous, which comes into operation when the door closes. In many possible applications, especially when such damping devices are used in elevator doors For safety reasons, the driving operation is only activated when the elevator door is completely closed is. However, because of the previously known return spring-loaded damping devices a counterforce also acts on the closing side, comes "

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it is before that the door is not closed so far as a result of the opposing force that a first Monitoring contact that switches when the door is fully closed operated and the ferry service can be initiated.

In recognition of this, the previously known damping devices adherent defect, the present invention has set itself the task of being effective here To remedy the situation.

The object of the invention is first achieved in an advantageous manner essentially in that the damping cylinder with at least two in the sense the end position damping of the door, each independent piston rod sections working independently of each other is equipped, one of which, namely the piston rod section which dampens the opening movement the damping direction by an automatic retraction of this piston rod section after the damping phase causing the return spring is loaded, while the other, the door at the end of the

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Closing phase damping piston rod section in terms of its re-extension without return means, i.e. without return spring executed, however, exclusively depending on the damping control of the opposed piston ^ Rod section unconnected, i.e. loose, by one inside the cylinder between the two piston rods and the driving piston rod provided only axially guided into a damping-ready, i.e. extended again Position is transferable.

By practicing before realizing the invention has succeeded in designing the damping piston acting on the closing side of a sliding door in such a way that that in the retracted state, i.e. in its end-P position, it was in no way in the sense of being extended again is burdened. Due to the proposal of the invention, there is no counterforce on this damping piston, so that the monitoring contact to be switched to initiate the ferry service is in the closed door position can now switch with absolute safety, i.e. the door is not acted on by any counterforce prevented from closing completely. Through the

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The subject matter of the invention thereby becomes advantageous helped to guarantee reliable ferry operations.

In this new version, however, the damping piston acting on the closing side of the door again in an extended, ready-to-cushion position Position, it is dependent on the damping movement of the opposing piston on the opening side the door is positively controlled via an interposed driver piston. Namely, the The sliding door is opened and its damping effect is initiated by the retracting opposing piston the movement of the piston inevitably also moves the driving piston rod and pushes the damping piston back into its on the closing side of the door Starting position back. The starting position of the damping piston on the opening side is through Relaxation of the spring preloaded during the damping stroke is achieved.

A preferred embodiment of the subject of the invention

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Standes can be achieved in practice, for example, when the driving piston rod as Intermediate member between the two damping piston rods within a fixed space in the cylinder and these in two chambers dividing, axial pressure medium flow openings bearing ring having bearing washer and with an axial pressure medium flow-through openings having piston head within the closing motion damping piston receiving chamber is performed that it also with its piston plate-free end in the engages another cylinder chamber for receiving the opening movement damping piston, and that finally on this Bearing ring disc on the side facing the opening movement damping piston which resets this piston

'on the load spring is supported.

The bearing ring disk thus fulfills a multiple function insofar as it initially affects the cylinder interior divided into two separate damping piston chambers, and on the other side as a bearing for the driving piston rod serves. In addition, there is also the piston plate of the driver piston rod on one side

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Side of this bearing washer to the stop, while the restoring spring on the other side of this bearing washer is supported for the opposed piston.

And finally, in the context of the present construction, it is also advantageous that the return spring supported on the opening movement damping piston by a cup washer axially inserted in its spring coils is whose axial inner opening as a centering cone opening for the free end of the driving piston rod is trained.

As a result, the driver piston rod receives a necessarily centered double guide when the damping piston provided on the opening side of the door executes its damping stroke. This is a considerable advantage with regard to the ease of movement of the work to be carried out.

The invention has succeeded in summary, a damping device in the most advantageous and expedient way to improve, whereby the construction

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construction is solved in such a way that it is not only simple, but also to a considerable extent cheap and, last but not least, from a functional point of view, extremely effective and can be viewed safely. The new damping device therefore has a high utility value represents and offers itself in practice as a most useful solution, because it all previously known designs is far superior to this type.

In addition, an embodiment of the subject matter of the invention is shown in the accompanying drawings reproduced; show:

Fig. 1 is a representation of the new damping device with two damping pistons in the ready to be damped, extended state,

FIG. 2 shows a representation corresponding to FIG. 1 with the closing movement damping piston in the retracted position Position,

FIG. 3, in contrast to FIG. 2, the opening movement damping piston when retracted, all

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Figures shown half in elevation and half in section, and

Fig. 4 disassembled the damping device into its individual parts, which are drawn in a position one above the other are shown individually partially in section.

First, 10 is a pressure medium cylinder denotes in which a e.g. liquid pressure medium - hydraulic oil - is accommodated. Inside this pressure cylinder is located at one point in a spatially fixed manner having a pressure medium throughflow openings 11 Bearing ring disk 12. This bearing ring disk 12 divides the cylinder into two piston chambers 13 and 14. In the exemplary embodiment, a closing movement damping piston acting on the closing side of the door is located in the piston chamber 13 15 provided, the piston rod 16 protrudes on one side from the cylinder 10 and means a tight closure 17 is screwed into the cylinder. Within the arms 14 there is one on the opening side of the door working opening motion damping piston 18, the piston rod 19 of which protrudes from the cylinder on the opposite side and also here

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is received by means of a tight closure 20. In the present case, the pistons and the closures are identical to one another as components executed.

Each piston is equipped with a pressure fluid control device, which is designed substantially as an adjustable control pin 21, which cooperates in the pressure medium flow opening 22 with a ball 23, which thus is able to make the cross section of the flow variable ^1. The pressure medium reaches the rear of the piston through the outflow opening 24. A flow opening 25, which interacts with a type of flutter valve 26, is used in each case for a rapid decrease.

Between the two pistons 15 and 18, a driving piston rod 27 is provided, which within a bearing opening 28 of the bearing ring disk 12 out is, is located with a piston plate 29 with flow openings 33 in the piston chamber 13 and above this is supported on the piston 15. The free end 27a

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the driving piston rod protrudes into the piston space 14 on the other side the bearing ring disk 12 into it.

A spring 30 is also accommodated in this space 14, which is attached to the bearing ring disc at one end 12 and at the other end is supported on the piston via a cup disk 31. The cup disk 31 has a conical Inner breakthrough as a centering mount for the free one End 27a of the driving piston rod 27 "

The mode of operation of the new damping device is best understood as follows. Based on the Fig. 1 shows the piston rod 16 during its damping movement in the direction of arrow A with its piston 15 id cylinder moved axially. In doing so, it pushes the driving piston rod 27 in front of it until the piston plate 29 strikes the bearing ring disk 12, thus reaching the end position of the damping piston 15. In In this situation, he is not burdened with a reset by any means. So the door is completely closed - Fig. 2 -.

Starting from this position, the

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Damping device the piston rod 19 in the direction -B is pushed axially into the cylinder together with the piston 18 when the door is opened when it hits the stop in turn, the driver piston rod 27 is pushed in front of this piston 18 and pushes the piston 15 back in the process until it has returned to its original position - Fig. 3 -. In addition, this damping movement the spring $ 0 is stretched. If the piston rod 19 loses its resistance on its pressure side, the spring 30 can relax and move the piston 18 back into the position shown in FIG. 1. Both pistons are thus in a position ready for damping again.

) It goes without saying that the illustrated

and described embodiment is only to be regarded as a practical example, but by no means here should be limited, rather, various designs are in particular within the scope of the invention with regard to the structural design of the inevitable transmission of motion from the opening motion damping piston on the closing motion damping piston

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just as possible, as well as a resetting agent-free Working of the closing motion damping piston enabling design execution.

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Claims (3)

m / m Expectations : (1 y device for damping both the opening and closing movements, primarily one with Sliding door equipped with a locking drive, e.g. elevator door or the like, with an expediently built into the locking rod, with end stops cooperating pressure medium damping cylinder on both opposite Front sides each have a piston rod section acting in the sense of door damping, characterized in that the damping cylinder (10) with at least two in the sense P the end position damping of the door, each independent piston rod sections working independently of each other (15:16 and 18:19), one of which namely the piston rod section which steams the opening movement (18,19) counter to the damping direction by an oelbsbätiges retraction of this Piston rod section after the damping phase causing return spring (JO) is loaded while - I -
2098 1 7/0338 ^ß * D OR _{iQiNAL the other piston rod section (15}} 16) damping the door at the end of the closing phase in the sense of its re-extension without return means, i.e. without return springs, however, only depending on the damping movement of the opposing piston rod section by a cylinder inside the cylinder between the two piston rods, i.e. loosely and only axially guided provided driving piston rod (27,29) can be transferred into a damping-ready position, that is to say extended again. 2. Apparatus according to claim 1, characterized in that the driving piston rod (27,29) as Intermediate link between the two damping piston rods (15, 16 and 18, 19) within one in the cylinder (10) fixed in space and these in two chambers (13 and 14) subdividing, axial pressure medium flow openings (11) having bearing ring disc (12) mounted and with a piston plate (29) having axial pressure medium through-flow openings (33) within which the closing movement damping piston (15) receiving chamber (13) is guided that they are also free of piston plates - II 2Ü98 1 7/0338 ßAD ORIGINAL End (27a) in the other cylinder chamber (14-) to Mounting of the opening movement damping piston (18) engages, and that finally on this bearing ring disc on the opening movement damping piston the side facing this piston is supported by the spring (30) which restores the piston. 3. Device according to claim 1, characterized in that that the return spring (30) on the opening movement damping piston (18) by one in their Peder turns axially inserted cup disk (31) supported is, the axial inner opening as a centering cone opening (32) for the free end (27a) of the Driving piston rod (27,29) is formed. - III 2098 1 7/0338 Blank page