DE2345162A1 - Centre junction piece for kite frame cross - has three hinged frame rod joints and one snap lock - Google Patents

Abstract

The junction piece is fitted to the upper end of the longer bottom section of the kite's spine. The two transverse arms of the frame are hinged about pivot spindles. The hinge joints are angled at approximately 150 deg. and incorporate stops to hold the arms at right angles to the spine. The shorter upper spine section pivots about an axis at right angles to those of the arms. It incorporates two recessed shanks parallel to the frame's long axis. The shank edges are shaped and notched and bear against a further spindle parallel to the pivot axis to form a snap lock when the short spine section is rotated into position. The spacing and location of the hinge axis is such that with all four outer frame ends in the fixing pockets of the kite cover, this remains slack until the short upper spine section is erected. The design simplifies assembly and reduces wear and tear.

Description

PATENT ADVOCATE DIPL. ING. HANS-PHFER GAUGER

PA DIPL. INC. HANS-PETER CAUCER ■ β MONKS β! · EFFNERSTR. 43 8 MUNICH 81

EFFNERSTRASSE 43 TELEFON 0811 / 98Ο 762

TELEGRAM ADDRESS: CAUPAT MUNICH

YOUR CHARACTER: MY CHARACTER: SchlHO — 2375 DATE:

VOURREF, MVREF, DATE:

Lawyer file χ Schmo-2375

FIBMA. SCHMOHL BROTHERS, 732 GÖPPINGEN, POSTSTRASSE 9

Cross piece for the rod cross of a folding wire.

The invention relates to a cross piece for the cross formed from two transversely and two longitudinally arranged spreader bars. nes folding kite, the rods with their one ends on the cross piece, preferably in the blind hole of a respective one Push-in sleeve of the same, and are attached with their other ends to the flight membrane stretched by them, preferably over each because one intended for plug connection with these other ends, Rigid plastic bag attached to the flight skin

The well-known cross pieces for the rod cross of folding kites are dimensionally stable plastic parts in which the cross consists of four one-piece receptacles with smooth blind holes

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wall is formed. The axes of the two receptacles for one end of the cross bars of the same length close in the normal plane to the aligned axes of the other two receptacles for the plug ends of the longitudinal rods of unequal length obtuse angle of about 150 °. This is mostly made of a plastic film printed with a motif formed flight membrane, which has plastic bags attached to it is attached to the free rod ends, a rod cross is obtained, which then also has a sufficiently stable flight behavior of the kite if no kite's tail is attached to the skin. To get a stable flight behavior, the flight membrane must also have limp areas lying between the rods, which are caused by the airborne wind are inflatable. These limp areas make it easier at the same time the sticking of the spreader bars when the respective Draohen is made airworthy.

Such folding kites were mainly from the point of view designed, a small volume packaging and transport size to obtain. In order to make the kite flyable, one end of the individual rods must first be in the pockets of the flight membrane and with their other ends inserted into the Steokhülsen of the cross piece. Because with this one The mating process, the skin is stretched at the same time, there is constant danger until the last end of the rod is inserted an involuntary loosening of the remaining rod ends in particular from the pockets of the flight skin, in which the rods sit just very looker. The children therefore often have appropriate Difficulty assembling the kite where excessive use of force leads to premature wear of the skin leads, in particular, to tearing of the flight membrane at the attachment points of the bags. If when Aufstedcen the cross piece on the βin · η rod ends not on its positionally correct Arrangement with respect to the hug skin is respected, arise When inserting the last end of the rod, there is inevitably higher tension in the flight membrane, which is mostly due to the application higher forces are attempted to be overcome. the

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As a result, the skin is stressed more than normal. Any incorrect arrangement of the cross piece with regard to the flight membrane is usually only found after the first attempt at flight with the kite, because it results in a missing one Climbing ability, the causal error of which is often first sought in the current wind conditions. It lab it is clear that this includes joy, especially with smaller children has to suffer to let a kite of this kind fly without the help of an adult.

There are largely no similar disadvantages in the case of the folding kites according to FIG US Pat. No. 3,305,198. In these kites, the rod cross is formed from only one longitudinal rod and two transverse rods, which when moved a sliding sleeve encompassing the longitudinal rod can be folded against the kite tip against the longitudinal rod. To the sliding sleeve are formed for this purpose two as receptacles for one ends of the transverse rods bending tabs, whose Bending lines result in the pivot axes for the cross bars glued to the flight membrane with their other ends. The flight skin is also glued to the two ends of the longitudinal rod, which also has a notch, in which when tensioned Flying skin has a pawl that is attached to the sliding sleeve is locked. To tighten the flight skin, the sliding sleeve must be moved away from the tip of the kite. The Cross bars unfolded progressively due to their attachment to the flight skin, until they are finally the one for the state of tension occupy the decisive positions of the flight skin, in which then the pawl of the sliding sleeve is locked in the notch of the longitudinal rod.

The disadvantage of this construction is that the notch, which, when the flight skin is tensioned, interacts with the pawl to anchor the sliding sleeve to the longitudinal rod, must be arranged in the cross point of the rod cross which is exposed to the highest loads. Since the notch considerably weakens the load-bearing cross-section of the longitudinal rod, there is consequential for this

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a very high risk of Bruoh · Unless the notch to reduce this risk of breakage is formed less deep, on the other hand there is the risk that the pawl in the plug of the kite will come loose from the notch, which then immediately causes the strike sleeve is moved against the kite tip, the cross bars are folded against the longitudinal bar and the kite falls. Regardless of the respective depth of the notch, this risk of falling is also given by the fact that every flap of the plughkin is transmitted directly to the pawl, so that it is set in uncontrollable vibrations that cause loosening out of the notch. The more often the kite is used, the more quickly material fatigue occurs on the pawl and also on the bending lines of the bending tabs, which have to transmit the entire tension of the plughkin to the socket. Finally, there is also a disadvantage of this known construction of a foldable bar cross the one-piece formation of the length table, which compared to a two-part training not only a longer Verpaokungs- and transport size results, but also with the same choice of material to achieve the same strength of the crossbar caused the choice of a larger cross-section. Since the rods of such folding kites mostly consist of round wood, the weight of the rod cross is consequently considerably greater with a one-piece construction of the longitudinal rod, so that a kite of this type is a worse one with the same size of the flying skin Climbing ability and other plug behavior has as a kite, whose longitudinal rod is designed in two parts

The invention is based on the object of a cross piece for the rod cross of a folding kite of the aforementioned type ■ o to further develop the ability of the kite to fly as well can be brought about quickly and largely effortlessly as in the paltdraohen that has been driven past with a hinged cross bar, wob ·! but the instabilities noted for it are avoided should.

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This object is achieved according to the invention in that three pivot axes arranged in this way to the respective The two cross bars and the one to the top of the draoh can be folded in leading shorter longitudinal bars against the further longitudinal bar are designed so that when the first of these three rods is folded in, the entire tension of the plughkin is lifted will. The distances between the pivot axes and the fastening end of the respective associated rod on the flight skin are for the preferred design of the cross piece, for example, chosen so that one longitudinal rod must first be folded against the other longitudinal rod before the transverse rods can be folded in. If the kite is to be made airworthy, then can therefore initially these cross bars because of the then still existing, complete flexural slackness of the flight membrane without special Physical effort to be issued. Only when the plughkin becomes increasingly tense when one of the longitudinal bars is finally folded down an appropriate force must then be applied for this, but because of its ability to concentrate on it a longitudinal bar is largely problem-free.

The position of the individual pivot axes is of course particular depending on the respective contour shape of the flight membrane and also on the size influencing the strength required for the crossbar. If the pivot axes are brought together in a common ball joint, then such a construction can only a lower strength is expected for the cross bar than if the Sohwenkaohsen experience a spatially separate formation, i.e. formed, for example, by hinge pins, are over which the sockets for the two cross bars and one of the longitudinal rods is hinged to the cross section «In this one Construction is therefore seen as a preferred embodiment of the invention.

Further advantageous and two-point embodiments of the invention are covered in the related claims. A currently preferred from a manufacturing point of view Embodiment of the cross piece according to the invention is in the

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W ^ Q ir.

Zeiohnung shown schematically and will be explained in more detail below described. Eb shows ι

Pig. 1 is a perspective view of a folding kite, the crossbar of which is equipped with a known cross piece, and

Fig. 2 on an enlarged scale and partially exploded perspective view of the cross piece according to present invention.

In the present Faltdrachen of interest type formed of air laid skin under cross bar consists of two equal length cross bars 1,2 and £ unequal length longitudinal bars 3, 4,

Rods have so far been with their one ends in the one-piece receptacles of a dimensionally stable cross piece 5 inserted, while their other ends were attached to the skin 7 via a respective dimensionally stable plastic pocket 6. The length of the individual spreader bars 1 to 4 had to correspond to the distances between the cross piece 5 and the individual pockets 6 must be coordinated so that when the crossbar is mounted, a tension that determines the flight characteristics of the kite is in the flight skin 7 resulted. Certain disadvantages result from the requirement to insert the individual expanding bars was pointed out. These disadvantages are described in more detail below with the cross piece according to the invention Kind of avoided.

The crosspiece according to the invention, functionally corresponding to the crosspiece 5, consists of a total of four individual parts 8, 9 and 10, of which the parts 9 are of identical design. In the assembled state, the parts 9 and 10 are captively connected to the part 8 via a respective pivot axis. The individual pivot axes are arranged on the part 8 serving to fasten one end of the longer longitudinal rod 3 'that both the transverse rods 1 * and 2 * as well as the shorter longitudinal rod 4' leading to the kite tip, which one ends at the Parts 9 and 10 and are attached with their other ends to the flight ^{skin, can be folded against the longer longitudinal rod 3 1} , the other end of which is also on the flight skin

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is attached. The distances between the pivot axes of the parts 9, 10 and the fastening end of the respectively assigned rod 1 ¹ , 2 ¹ and 4 ¹ on the flight skin are chosen so that only the pivoting of one part 10 over the flight skin is decisive for the Induction or elimination of tension in the flight membrane. If the folded fallow be made capable of flight, and only then the transverse rods 1 * must be expanded ^f 2 before the shorter longitudinal rod 4 can 'unfold to progressive voltage of the flight skin. The flight skin has reached its full tension when the part 10 is fully unfolded. As a result, the tension of the flight skin is released again in the moment when the shorter longitudinal rod 4 * is folded ^{over the flight membrane against the longer longitudinal rod 3 1 in order to fold the kite.}

The part 8, which is manufactured separately from parts 9 and 10 as a molded piece for manufacturing reasons, consists of a hollow cylindrical ^{main body 11 which is open at one end for plug connection with the longer rod 3 1} and closed at its other end and which can be defined as a socket. A plate-shaped bracket 12 is integrally formed on the outer wall of this plug-in sleeve 11 between its ends. The end face of this bracket 12 facing the open end of the receptacle 11 has two molded projections 13 and 14 which enclose a central angle of approximately 150 ° with the axis of the receptacle 11. This center point corresponds to the angle which the receptacles for the transverse rods 1, 2 in the known cross piece 5 enclose in the normal plane to the aligned axes of the two other Steckhtilsen for the longitudinal rods 3, 4. In each projection 13 »14 a U-shaped slot 15 is formed which is axially parallel to the Steok sleeve 11 and which, in a manner to be described in more detail, results in a latching connection with a respective hinge pin 16 of the parts 9. A further projection 17, 18 is arranged parallel to each projection 13 at a distance which essentially corresponds to the thickness of a hinge plate 19 of the parts 9. On the outside wall

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the socket 11 is near its closed end with respect to another of the part 10 acting as a hinge pin, web-like projection 20 is integrally formed, in alignment with which a further projection 21 is formed on this end of the socket 11.

The parts 9 each consist of a plug-in sleeve 22 which is open at one end for plug-in connection with the transverse rods 1 ^f , 2 ″, at the other, closed end of which the aforementioned hinge bracket 19 and a further, identically designed hinge bracket 23 are integrally formed , 23 of each part 9 are arranged at a parallel distance from one another which essentially corresponds to the thickness of the projections 13, 14 which consequently enclose between these lugs when the parts 9 are mounted on the part 8. The hinge lugs 19, 23 are, as shown at 24, so that a respective hinge pin 16 can be knocked into these tabs. The parts 9 are locked into the slots of the projections 13, 14 via their respective hinge pin 16, as follows for the functionally corresponding snap-in connection of the part 10 with part 9 is explained in more detail.

Also, the part 10 consists of a one at its end to the plug-in connection with the shorter longitudinal rod 4 ¹ SteckhUlse open 25 at its other, closed end 26 and two pivot plates are formed 27th The mutual spacing of these joint lugs 26,27 corresponds to the outer diameter of the socket 11 of the part 8. The joint lugs 26,27 each have a longitudinal slot 28 or 29 functionally corresponding to the longitudinal slot 15 in the projections 13,14 of the part 8 for locking connection with the the hinge pin 20 functionally corresponding to the hinge pins 16 of the parts 9, which hinge pin 20 is formed on the outer wall of the socket 11. The diameter of this hinge pin 20 is slightly smaller than the mouth of the slots 28, 29, which narrow inward behind the respective mouth to a width smaller than the diameter of the hinge pin 20 and end in a respective slot base, the one opposite the diameter of the hinge pin 20 has a larger opening width. Consequently, the part 10 in the direction of the arrow 30 with its slots 28,29

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When pushed forward over the hinge pin 20, the slots 28, 29 then briefly experience a widening when their slit area, which is narrower than the hinge pin 20, slides past the hinge pin. The hinge pin 20 then engages in the base of the slots 28, 29, which has a larger opening width than it, so that there is now a captive connection between the part 10 and the part 8, which, however, is such that the part 10 is in the direction of the double arrow 31 can pivot relative to the part 8 about the hinge pin 20 as a pivot axis. In the same way, the parts 9 can also be pivoted relative to the part 8 in the direction of the double arrows 33 and 34 after their latching connection with the slots 15 of the projections 13, 14 effected in the direction of the arrow 32 via their respective hinge pin 16. While the pivoting movement of the parts 9 in the sense of folding out the transverse rods 1, 2 is limited by the console 12, the pivoting movement of the part 1o in the sense of folding out the shorter longitudinal rod 4 * is limited by the fact that the closed end of the socket 25 to The stop comes to the closed end of the socket 11 of the part 8. When this stop position of the Steokhülse 25 is present on the socket 11, latching notches 35 and 36 formed on the hinge plates 26, 27 are in operative connection with the pin-like projection 21, so that a lock above it is made available, which prevents the shorter longitudinal rod 4 * from inadvertently collapsing against the longer longitudinal rod 3 *. The latching connection between the notches 35, 36 and the pin-like projection 31 consequently, in cooperation with the hinge pin 20 engaged in the slots 28, 29, absorbs the tension in the flight skin which is released when the kite is folded up at the moment in which the shorter Longitudinal rod 4 * is folded against the longer longitudinal rod 3 *. As long as the shorter longitudinal rod 4 * is unfolded, the same lock, in conjunction with the tension in the flight membrane, prevents the transverse rods 1 *, 2 * from collapsing against the longer longitudinal rod 3 *, that is, the shorter longitudinal rod 4 * must first become pliable State of the flight membrane are brought about before the cross bars 1 », 2 ¹ can be folded. A.o.

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On the other hand, to make a folded kite airworthy, the cross bars 1 ¹ , 2 ¹ must first be unfolded before the shorter longitudinal bar 4 ¹ leading to the kite tip can be unfolded under progressive tension of the flight skin.

This provides a cross piece for the cross bar of a folding kite, which is due to the construction described suitable for a permanent arrangement of the individual spreader bars. The kite equipped with it can therefore unfold very quickly and largely effortlessly and also fold it up again, with the flight skin facing in an optimal way possible damage is protected. Overall, the cross piece is designed in such a way that there is no movement whatsoever when the kite is in flight Instabilities results because it has a stiffness comparable to that of the known cross pieces.

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Claims (16)

Claims * - S 4 b I b Z , 1 J cross piece for the cross of a folding kite formed from two transversely and two longitudinally arranged spreader bars, the bars with their one ends on the cross piece, preferably in the blind hole of the respective socket, and with their other ends on the flying skin stretched by them are attached, preferably via a rigid plastic bag which is provided for a plug connection to these other ends and is attached to the flight skin, characterized in that three pivot axes (16, 20) arranged in this way on the cross piece for the respective folding of the two cross bars (1 ¹ , 2 ·) And the shorter longitudinal rod (4 ¹ ) leading to the kite tip are formed against the further longitudinal rod (3 ¹ ) so that the entire tension of the flight skin is released when the first of these three rods is folded in. 2. Cross piece according to claim 1, characterized in that the distances between the pivot axes (16, 20) and the fastening end of the respective associated rod (1 ', 2 ¹ , 4 ¹ ) on the flight skin so gewähli ^ ind that only the one Longitudinal rod (4 ⁽ ) must be folded in against the further longitudinal rod (3 ¹ ) before the transverse rods (1 ¹ , 2 ¹ ) can be folded in. 3. Cross piece according to claim 2, characterized in that the pivot axis (20) of the one longitudinal rod (4 ^f ) is designed for folding the same over the flying skin underlaid with the rod cross. 4. Cross piece according to one of claims 1 to 3 »characterized in that at least the pivot axis (20) of the one longitudinal rod (4 ¹ ) is assigned an effective lock (21, 35, 36) when the flight skin is tensioned. 5. Cross piece naoh one of claims 1 to 4 «characterized in that the pivot axis (20) of a longitudinal rod (4 ^f ) aligned transversely perpendicular to the further longitudinal rod (3 ¹ ) and the separate pivot axes (16) of the cross bars (1 ·, 2 '). 509811/0215 6. Cross piece according to one of claims 1 to 5, characterized in that the pivot axes are formed by hinge pins (16, 20) through which the Steckhtilsen (22, 25) for the two cross bars (1 », 2») and the one Longitudinal rod (4 ¹ ) are hinged to the cross piece formed by a plug-in sleeve (11) for one end of the further longitudinal rod (3 ^1). 7. Cross piece according to claim 6, characterized in that the receptacles (22, 25) for the transverse rods (1 ¹ , 2 ') and the one longitudinal rod (4 ¹ ) in each case when the flight skin is tensioned, effective limiting cones (12) on the cross piece to limit the Folding movement of the respective rod are assigned. 8. Cross piece according to one of claims 4 to 7, characterized in that the lock is designed as a latching connection (21, 55, 36) between the plug-in sleeve (25) of the one longitudinal rod (4 ^f ) and the cross piece. 9. Cross piece according to one of claims 6 to 8, characterized in that either the receptacles (22) or hinge pins (16, 20) arranged on the cross piece form a detachable snap-in connection with the other Have part. 10. Cross piece according to one of claims 6 to 9, characterized in that the receptacles (22) for the transverse rods (1 ¹ , 2 ¹ ) each have two hinge plates (19, 23) for the end-side mounting of the respective hinge pin (16) are formed, which can be locked in its section lying between the hinge plates in a U-shaped locking slot (15) of a respective Yorsprungee (13, H) of the cross piece. - 3 50981 1/0215 - r- 11. Cross piece according to one of claims 6 Ms 10, characterized in that on the Steokhülse (25) for the one longitudinal rod (4 ^f ) two hinge plates (26, 27) are formed, which for! Fixed connection with the joint pin formed on the cross piece (20) have provided, U-shaped locking slots (28, 29). 12. Cross piece according to claims 8 and 11, characterized in that on the hinge tabs (26, 27) of the plug-in sleeve (25) for the one longitudinal rod (4 ¹ ) in alignment with the locking slots (28, 29) arranged locking notches (35, 36 ) are formed, with which a pin-like gate protrusion (21) formed on the cross piece is in operative connection when the longitudinal rod is folded out. 13. Cross piece according to claims 7 and 10 to 12, characterized in that the stops of the two receptacles (22) for the cross bars (1 ¹ , 2 ») by an integrally formed on the cross piece, common console (12) and the stop for the receptacle (25) of a longitudinal rod (4 ¹ ) are formed by the associated end of the receptacle (11) for the further longitudinal rod (3 ¹ ). 14. Cross piece naoh claims 10 and 13 »characterized in that the locking slots (15) for the hinge pins (16) of the sockets (22) for the cross bars (1 ·, 2 ¹ ) having projections (13, 14) are integrally formed on the console (12) and each of them is assigned a further projection (17, 18) at a distance which essentially corresponds to the thickness of the one joint bracket (19) guided between the two projections in the assembled state of the associated plug-in sleeve. 15. Cross piece at least naoh claim 6, characterized in that it consists of four separately manufactured pora pieces (8, 9, 10) made of plastic or the like. consists of the hinge pins (16, 20) to a captive unit are mountable. - 4- 509811/0215 16. Folding kites, the cross of which is a cross piece after a having claims 1-15. 509811/0215