DE8427190U1 - Shielded tension spring for goals or the like. - Google Patents

Description

The invention relates to a shielded tension coil spring for gates, doors or the like. Building closures, in particular as a counterbalance device for overhead movable door leaves, with the features of the preamble of claim 1.

Extension springs of the type in question are under a certain preload, that of a shortest operating length corresponds to the spring, and operated at a maximum voltage that corresponds to the maximum operational expansion of the spring and provided with an enclosure encircling the spring over this operational expansion range thereby, that it consists of two telescopically slidable sleeves and thus over the operational stretch the spring is designed to be variable in length. This prevents you from getting between the helix intervene and injure yourself when the springs are pulled together. If a spring break occurs, it becomes abrupt considerable spring forces free, which lead to the fact that the spring parts resulting from the breakage, their number can be greater than two due to a break in more than one point of the spring, not only in the longitudinal direction of the spring, but also try to remove across it. The enclosure prevents these parts from creating a high risk of such high energy storage capacity for people in the vicinity and when the spring breaks Stuff occurs that is sure to be avoided.

In a known tension spring with variable length Protective covering of the type in question, US Pat. No. 3,402,922 - are the two, the variable in length Sheath forming, telescopically displaceable into one another

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Dipl.-lng. Otto Flügel, Dipl.-Ing. M η η Creel Siiger, patent attorneys, Cosimiistr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

12,573

Sleeves made of sheet metal, which can be joined together with their two free longitudinal side edges to form a sleeve. Since this is done by screws, these sleeves can be arranged around the springs after they have been installed. The two sleeves are supported at their end areas facing the spring ends on the helical spring body, so that the spring holds or entrains the respective sleeve in the course of expansion, whereby the teleskoparti.ge Displacement and thus the change in length can be achieved according to the expansion of the spring. This support takes place with the help of pins, which in the end areas of the sleeves through their walls are performed and the opening of the sleeve at the front reach approximately diametrically. If the spring breaks, they will try Spring parts emerge from the sleeve up and down, causing them an impact load on the pins or exert their mounting in the sleeves. At the same time, impact forces occur transverse to the longitudinal direction of the spring trying to drive the sleeves apart by pivoting them sideways. The total here The forces that occur are very high; they must first be absorbed by the pin holders in the area of the end of the sleeve secondly, the overlap between the spring must also be in the greatest possible stretch position of the spring Sleeves should be long enough to prevent them from disengaging. This leads to the dimension and the material properties of these sleeves accordingly great demands have to be made.

There are a number of proposals have become known to secure a coil tension spring against breakage in that one a catch element leads through its interior - for example DE-PS 29 23 327 -, with the advantage, that by up-

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

12,573

take from deformation work on the element in the spring stored energy that is released in the event of breakage is absorbed. However, there is no interlocking protection between the helical spring coil and thus the Handle the spring accordingly carefully during installation. U.S. Patent 3,575,404 is a Proposed spring of the type in question, in which, in addition to a telescopic interlocking, variable length covering of the spring, an additional one Catching device is provided from two wire loops, each of which is fixed to a spring end area and which reach through in the area in between, in such a way that the spring is unimpeded by the loops in their largest operational expansion & position can reach. When the spring is pulled together, the loops move parallel to one another. This secured helical tension spring device is particularly complex, also with regard to its spring holder. The in Wire loops located inside the coil spring cause corresponding noises when the springs expand or contract.

The invention is based on the object of creating a helical tension spring of the type in question full protection against finger interference and being thrown off in the event of a spring break during operation can be produced easily and with minimal expenditure in terms of the amount and / or value of the material used and allows convenient and safe handling.

Starting from a shielded tension spring with the features of the preamble of claim 1 is this object according to the invention is achieved by its characterizing features.

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säget, patent attorneys, Cosimaslr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

12,573

The helical tension spring designed according to the invention is provided with a covering of two - in particular three - sleeves, whose end regions facing the spring ends are supported with a cover on the helical coil body. Due to this cover closure, a large area Hold against leakage of the spring from the envelope in the event of breakage guarantee. The lid is over its entire Peripheral area attached to the associated sleeve or formed, so that because of the load distribution achieved thereby the material of the envelope can be kept correspondingly weak and lightweight. So far more permanently deformable Material is used, some of the material that is released in the event of a spring break may be the result of deformation work Energy to be absorbed. The individual sleeves are prevented from slipping out of the telescopic engagement with stops secured, which are formed at the respective sleeve ends themselves. This ensures that among the Spring break forces that occur in no case can the sleeves disengage and thus the envelope completely is maintained, even with maximum spring elongation in the operating range. This applies to both the forces that occur when the spring breaks in the longitudinal direction of the envelope, as well as for the transverse forces that the To pivot the sleeves sideways and thus seek to disengage them.

If you hold the sleeves only in the area of the spring ends, as is the case with the prior art, you have to the overlap area of the sleeves even at maximum operational elongation Select the spring so large that the buckling strength of the envelope in this area is sufficient to allow it to pivot sideways to prevent the pods. The sleeves must therefore be made longer and therefore heavier and more stable than is necessary in view of the teaching of the invention.

Dipl.-Ing. Otto Huegel, Dipl.-Ing. Manfred Säger, godfather lan wülte, Cosimastr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

12,573

It is of particular importance that, according to the invention, the prefabricated spring itself is completely unstressed
is provided with the envelope, such that the
Sleeves are preferably in their fully collapsed telescopic displacement position. Only the connecting hooks of the spring protrude from the covers at both ends through corresponding openings. This achieves
that the spring can be provided with the envelope as an independent element before it is used. the
Frontal terminations or covers of the cover can thus be provided or applied automatically to the corresponding sleeve end areas, transport and storage are simplified accordingly and the cover is protected from the start when the spring is installed, which for the regular case of installation under Spring preload is of particular importance. Also at
the assembly is therefore given complete protection from the start and handling is made easier.

According to the invention, so bai the production is proceeded in such a way that the sleeves are assembled to the extent prefabricated to the telescopic tube, in which then the with the
Connection hook prefabricated coil spring body is used, whereupon the telescopic tube on the end face up to
the openings for the connecting hooks or
these passage openings and a slot for a perforated strip with the formation of or placement of the
insofar prepared lid is closed and as
Completed component is available for installation at the place of manufacture or the use of the gate.

If the change in length, which the spring is intended
is subject to the double length of the completely unstretched spring body does not exceed, the envelope can
two sleeves are formed. In many cases, however, in particular

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Stef.nhagen

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12,579

when used as a counterbalancing spring for overhead movable ones one-piece door leaves, the spring is stretched more, in particular up to about three times the unstretched Spring body. In this case there is an envelope of three sleeves, which are inseparably connected with one another in the manner described above.

The end-face terminations in the manner of a cover can be divided into several sections by corresponding bends divided Hulsenendbereiches are formed, immediately leaving the passage opening for the connection hook of the spring and, if necessary, also the feed-through slot for receiving a spring mounting strip in one, especially in the operating position, the upper cover. After turning the corresponding wall parts A stiffening welding process can take place on the cover. The lid can also be used as a separate one Component are prefabricated and then placed on the sleeve, there it is by welding or in particular but preferably fixed by flanging around a thickened edge area of the sleeve end area.

The end regions each facing a neighboring sleeve are provided with inwardly or outwardly protruding projections which are in particular hook-shaped in such a way that © ie with the hook-shaped projections adjacent to each other in the fully extended position of the telescopic tube the other sleeve come into a claw-like engagement, which is provided in particular over the entire edge region so that a good load distribution takes place.

This sleeve production and the closing with a lid _t is accessible for series production, which is what with such mass

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Dipl.-lng. OKo wing, Dipl.-Ing. Miinfrcd Siigcr, I'ulcnlanwälte, Cosimusir. 81, ϋ · 8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

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12,579

articles has special weight.

In a preferred embodiment, the sleeves are designed in such a way that their diameters decrease in succession exhibit. However, it is also possible, for example in the case of an embodiment with three sleeves, to include the two end sleeves to manufacture the same diameter and to make the middle sleeve, for example, larger. In order to be able to assemble the sleeves telescopically, this middle one is then The sleeve is closed on the shell side only after the telescopic tube structure has been produced.

Further embodiments of the invention emerge from the subclaims, in particular with reference to the exemplary embodiment reproduced in the drawing, the description of which below explains the invention in more detail.

Show it

FIG. 1 shows an interior view of the left side of an open door with the spring according to the exemplary embodiment;

Figure 2 is a side view of the left side of this open gate;

FIG. 3 shows a schematic side view of the wrapped spring according to the exemplary embodiment;

FIG. 4 shows an interior view of the left side of the closed gate with a lower pretensioning orientation Hanging in a spring strap;

Figure 5 is a side view of the left side of the closed gate with a high bias in the

Dipl.-lng. Otto Flügel, Dipl.-Ing. Manfred Siiger, Patent Attorneys, Co.simiistr. 81. D-8 Munich 81

Hörmann XG Amshausen 4803 Steinhagen

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12,579

Pen holder tape suspended spring;

Figure 6 is a schematic longitudinal sectional view of the unstressed spring with covering of three sleeves;

FIG. 7 shows a schematic longitudinal illustration through the casing made up of three sleeves in the fully extended state State;

Figure 8 is a plan view of the upper cover in the operating state of the exemplary embodiment.

The single-leaf overhead garage door 1, shown sketchily in some areas in FIGS. 1, 2, 4 and 5, has a frame 2 connected to the masonry surrounding the door opening to be closed, while the door leaf 3 is between an open position - FIGS. 1 and 2 and a closed position - Figures 4 and 5 - can be moved back and forth. The door leaf is held longitudinally displaceable in its area facing the inside of the garage in a manner not shown by means of rollers in horizontally extending guide rails, while in its front edge area the one articulated end of the longer arm of a double-armed lever 4 engages, which is pivoted about an axis 5 relative to the frame . At the end of the shorter lever arm, which is ausgebil det as a double arm 7, there is a support axis 6, around which a spring receiving band 8 is wrapped, which has a number of receiving openings 9 for the optional suspension of a counterbalance spring. This overall arrangement is mirrored in the right area of the gate. If the door leaf 3 is transferred from the open position into the closed position, the lever 4 pivots about the axis 5 from the position shown in FIGS

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Siiger, patent attorneys, Cosinwstr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

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12,579

Door leaf 3 counterclockwise

Double arm 7 pivoted upwards and tensioned the counterbalancing spring. This is described here as an example Gate construction is known.

The spring used here for weight compensation, designated as a whole by 10, has a spring body 11 which includes the spring coil. The spring coils run out on both sides in connection hooks 12, which are used for fastening or hanging serve the spring. The connection hook 12, which points downwards in the operating position, is suspended in a holding bracket 13, while the upwardly pointing hook 12 is suspended in one of the receiving openings 9 of the spring receiving band 8 is.

Figure 3 shows the spring in a completely untensioned state, as it is before hanging in the operating position is delivered to the gate. In this delivery state, the spring body 11 is already completely covered by an envelope 14 encompassed, which in this example is formed from three sleeves 15, 16, which can be shifted in length in the manner of a telescopic tube are related to each other, as will be explained more clearly later. The envelope or the den End regions 19 of the sleeves 15 and 17 facing both spring ends are closed with covers 20 which have a passage opening for the connection hook 12, as will also be described in more detail later.

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, Palentanwälte, Cosimustr. 81, D-8 Munich 81

Hörmann KG Amshausen

4803 Steinhagen - 14 - 12. "S79

FIG. 3 shows the spring 10 which has not been inserted and is therefore completely unstressed, and its spring body 11 as a rule contiguous or only slightly objectionable Has spring coil. In this state, the spring body 11 is already completely enclosed by the casing 14. As will be described later, the telescopic tube is out of the sleeves in this shifted position of the sheath 14 15 to 17 practically completely pushed together - Fig. 6. In Figures 1 and 2, the only pretensioned and correspond to the least stretched state of the spring in operation with the gate open, the envelope 14 is accordingly slightly elongated so that the sleeve 16 is visible next to the sleeve 15. In this state is the support axis 6 of the double lever 7 in its lowest position. In Figs. 4 and 5, the door leaf is shown closed, the support axis 6 has reached its highest possible position by pivoting the lever 4, whereby the spring 10 is transferred to its highest operational expansion position. As can be seen from Figures 1 to 5, the spring body 11 is by pretensioning and operating tension by more than twice its length in the unstretched State pulled out, so that the envelope has a total of three sleeves.

In Fig. 4, the upper connecting hook 12 of the spring 10 is hooked into the lowermost receiving opening 9 of the spring receiving band, which means that the spring preload is correspondingly low - Figures 1 and 2 - and that the spring is closed Door leaf experiences a maximum expansion, which is also correspondingly small.

To adapt the compensating spring effect to the weight of the door leaf, which can be of different difficulty due to different design, or to adapt to other inputs

Dipl.-Ing. Otto Huegel, Dip! .- ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81 Hörmann KG Amshausen

4803 Stsinhagen - 15 - 12,579

rivers can the upper connecting hook 12 of the spring 10 in a corresponding other receiving opening 9 of the spring mounting strip des 8 are hung so that the spring preload changes accordingly. In Fig. 5, the connection hook 9 is in the uppermost receiving opening 9 hooked, what the greatest possible tension of the spring both in the pretensioned as also in the fully tensioned state with the door leaf 3 closed. It can be seen from Fig. 5 that here the envelope 14 assumes its greatest longitudinal extent, the sleeves 15 are thus fully extended, as can be seen in FIG leaves.

The exemplary embodiment of the shielded spring is explained in more detail with reference to FIGS. 6, 7 and 8. The very schematic longitudinal section according to FIG. 6 corresponds to FIG Schematic representation according to FIG. H. the spring is completely unstretched and the spring body 11 is in the state its smallest possible length. In this case the sleeves 15 to 17 are practically completely one inside the other pushed, as can be seen in FIG. The sleeves are arranged - Fig. 7 - that their diameter in one Seen longitudinally of the telescope - decreases from sleeve to sleeve. The end regions assigned to the spring ends 18 19 of the uppermost sleeve 15 and the lowermost sleeve 17 each have a cover 20 which has a feed-through opening 21 for the respective associated connection hook 12. This means that on the associated end region 19 the sleeve 15 or 17 attached cover at the end faces the spring body 11 from the spring coils. To Nesting the sleeves 15 to 17 to the telescopic tube or the sheath 14 and their telescoping is the The spring 10 is inserted into the cavity of the sleeve 17 with the smallest diameter, whereupon the cover 20 is placed on the sleeve end regions 19, namely with passage

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

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12,579

the connecting hook 12. In this state, the cover can be firmly connected to the sleeve, which means different This can be done, for example, by flanging around the correspondingly thickened edge of the end region 19 of the sleeve 15 or 17. Of course, one of the covers can be attached to the associated one before the spring is inserted Fasten the end region 19 and then insert the spring, the corresponding hook-shaped projection 12 then through the slot 21 must be guided.

The sleeve ends 24 of all sleeves, with the exception of the End regions 19 are provided with projections 25, which are formed, for example, by flanging from the sleeve material are and have a hook shape, such that the outlet edge area of the continuous over the circumference formed projections 25 bent back in a parallel position to the jacket wall 27 of the same sleeve in each case is. This creates an annular shape between this jacket wall 27 and the outlet edge region 26 of the projection 25 Slot 28.

As can be seen in FIG. 7, is in each case in the area of the transition from a sleeve of smaller diameter to such a larger diameter of the projection 25 of the sleeve smaller diameter radially outward and the projection 25 of the larger diameter sleeve formed radially inward. This ensures that the sleeves, which are pulled apart to the full telescopic length, with the projections in one another intervene so that in each case the outlet edge regions of the one sleeve into the annular groove 28 of the other sleeve intervene, as shown in the schematic sectional view. Fig. 7 can be clearly seen.

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

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12,579

The thickened edge of the two end regions 19 for fixing the respective associated cover 20 by flanging can be formed like the projections 2'ό , in each case protruding radially outward both in the case of the sleeve 15 and the sleeve 17 Projections 25 on the lateral surface 27 to be deformed. However, this is only one example of the definition that makes it possible to use the flanging processes for obtaining the projections 25 also for the preparatory definition of the cover.

Fig. 8 shows a plan view of the upper cover 20, the neber, the passage opening 21 for the connecting hook 12 has a through-slot 22 which runs perpendicular to the opening 21 and thus together with it forms a cross-shaped recess. The feed-through slot 22 serves to hold the lower end of the spring receiving band to engage in the spring body 11 when the connecting hook 12 is in a receiving opening further above 9 of the spring receiving band is suspended, as shown in FIG.

Due to the serial prefabrication of the spring with casing as a completed component before use With a gate or the like, a simple, mechanical production and safe design of the envelope is achieved, namely due to good load distribution and form-fitting retention of the sleeve ends 24 to one another at the greatest Spring expansion, whereby the sleeves can be designed to be correspondingly weak and short, so that Material and weight are saved. Due to the complete encapsulation in the unstretched state, the Insert the spring effortlessly and without risk in its preload position,

Dipl.-Ing, Otto Flügel, Dipl.-Ing. Manfred Siiger, patent attorneys, Cosimaslr. 81, D-8 Munich 81

Hörmann KG Amshausen 4803 Steinhagen

12,579

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It therefore not only offers protection against finger interference and Spring breakage damage during operation, but it protects the fitter in a corresponding manner during the production of the Tores or replacement of the spring.

Claims (1)

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81 Hörmann KG Anishausen 4803 Steinhagen 12,573 / bottle / B Shielded tension spring for goals or the like. EXPECTATIONS 1. Shielded tension spring for gates, doors or the like. Building closures, in particular as a weight compensation device for door leaves that can be moved overhead, with a length-adjustable protective cover made of at least two telescopically displaceable against each other Sleeves, the spring ends of which are provided with connecting hooks projecting in the longitudinal direction of the spring end regions located on the screw body are supported at the end, thereby characterized in that the end regions (19) of the sleeves located at the spring ends (18) (15, 17) are provided with covers (20) each having a passage opening (21) for the connection hook (12) of the associated spring end (18), and that the other over the telescopic displacement distance the shell wall (27) of the respective adjacent sleeve (15 or 16 or 17) remaining sleeve ends facing (24) in the longest possible telescopic extension position to prevent further extension movement connect with each other. 2. Spring according to claim 1, characterized in that the sleeve ends (24) with each on the inner or outer surface of the shell Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81 Hörmann KG Amshausen - 2 - 12,573 Steinhagen wall (27) of the respective adjacent sleeve (15 or 16 or 17) to directed radially protruding projections (20) are provided, which are positively connected to one another in the longitudinally possible telescopic extended position step. 3. Spring according to claim 2, characterized in that the edges of the sleeve ends (24) with the formation of hook-shaped projections (25) in approximately parallel position to the jacket wall (27) of the associated Sleeve (15 or 16 or 17) are designed to taper off. 4. Spring according to claim 2 or 3, characterized in that the projections (25) are formed around the circumference and between them and the associated jacket wall (27) each have one Form annular groove (28), the radial width of which is greater than the radial width of the projection (25) of the adjacent sleeve (15 or 16 or 17). 5. Spring according to one of claims 1 to 4, characterized in that the cover on the The end area of the associated sleeve is formed in one piece with the latter. 6. Spring according to one of claims 1 to 4, characterized in that the cover (20) on the end region (19) of the associated sleeve (15 or 17) is positively fixed. 7. Spring according to claim 6, characterized in that the cover (20) on the associated ■ · «« · · t ■ ·· · aifi ' Dipl.-lng. Otto Flügel, Dipl.-Ing. Manfred Siiger, patent attorneys, C'osinuistr. 81, I) -H Munich 81 Hörmann KG Amshausen 4803 Steinhagen 12,573 gene sleeve (15 or 17) set by flanging around a correspondingly thickened end region (19) is. 8. Spring according to claim 7, characterized in that the thickening in the end region (19) the sleeve (15, 17) is the same or similar to the projection (25) on the opposite end of the sleeve (24) in the pressed-in state by the flanging. 9. Spring according to one of claims 1 to 8, characterized in that the cover (20) next to a slot-shaped passage opening (21) for the connecting hook (12) of the associated spring end (18) a feed-through slot (22) for a spring receiving band (8) which, together with the passage opening (21), has an approximately cross-shaped recess (23) forms. 10. Spring according to one of claims 1 to 9, characterized in that more than two, in particular three sleeves (15-17) arranged one behind the other so as to be telescopically displaceable relative to one another are. 11. Spring according to claim 10, characterized in that the sleeves (15-17) in their Successive formed with decreasing diameter are. 12. Spring according to one of claims 1 to 11, characterized characterized in that the sleeves (15-17) are made of metal, in particular sheet steel. Dinl -Ing Otto wing. Dipl.-Ing. Manfred Siigcr. Patent attorney c. Cosimastr. 81. D-8 Munich 81 Hörmann KG Amshausen 4803 Steinhagen 12,573 13. Spring according to one of claims 1 to 11, d a d u r ch characterized in that the sleeves Made of plastic. 14. Spring according to one of claims 1 to 12, characterized marked that in the attack area between the projections (25) of the sleeves (15-17) and the jacket wall surfaces facing them adjacent sleeves (15 or 16 or 17) sliding layers are provided. 15. Spring according to one of claims 1 to 14, characterized characterized in that the sleeves (15-17) as a whole with a plastic with good sliding properties are coated. 16. Spring according to one of claims 1 to 15, characterized characterized in that the envelope (14) when the telescopic position is completely pushed together Sleeves (15-17) in the smallest length is no longer than the spring coil body (11) in completely unstretched State.