DE3323768A1 - Collapsible, preferably pontoon-shaped, hull - Google Patents

Abstract

Collapsible, preferably pontoon-shaped, hull with an outer skin and a tightening framework. The invention relates to a hull of the aforesaid type. The object of the invention is to design a hull which, without loose individual parts, can be spread out and folded up quickly and easily by one person, is light-weight, takes up little space, is readily transportable and its space can readily be utilised and provides the user with safety. According to the invention, all individual parts of the tightening framework, firmly connected to one another, and at least the predominant part, firmly connected like an umbrella to the outer skin, can be spread out and folded up together with the outer skin. The tightening framework consists of a port and a starboard profile frame and longitudinally adjustable bow and stern cross-connections (vessel cross-struts) which are in operative connection with longitudinal connections, for example a long variable keel strut with toggle-lever-like tightening element, as a result of which, when the outer skin is tightened in the longitudinal direction, the outer skin of the bow and stern wall is at the same time tightened in the transverse direction. <IMAGE>

Description

"Collapsible, preferably pontoon-shaped hull"

The invention relates to a collapsible, preferably pontoon-shaped Boat body'der from an outer skin and a collapsible'preferably pontoon-shaped Boat body, which consists of an outer skin and a clamping frame with stiffening, clamping and There are articulated connection elements that determine the final shape of the boat hull Boat hulls are collapsible so that they can be easily manually or by land, air -and watercraft transported over long distances at the destination can be built up and used as a watercraft itself. Such also under The hulls known as folding boats are usually folded up for Suitable for transporting smaller numbers of people by water. They can be folded up both on public transport vehicles, such as railways or Buses but also on private small passenger cars or other small vehicles, yes even pulled by hand on small boat carts or as hand luggage in carrier bags and in backpacks.

Characteristics of the known technical solutions.

DE-OS No. 2229 933 is already a portable and foldable one Boat and a method for its manufacture have become known, according to which the main body de boat made of a thermoplastic corrugated shape corresponding to the shape of the boat Plastic sheet with pressed-in folds and consists of a floating body, whose both end sections made of the same sheet material as the main body the corresponding end sections and its central part attached to the bottom of the boat There are removable reinforcements inside the main body of the boat Flexural folds of the main body define the area of a wall and a floor as of the train and the stern. The reinforcements are made of the same material as the Main body of the boat and can iius reinforced plastic or light metal They are preferably located in two places near the fold lines in order to to support these and thus contribute to the strength of the boat.

The assembly of the boat is done by the mere act of putting it together easily possible if all accessories such as reinforcement material, oars, cleats and Outboard machines are releasably attached.

After use, the boat can be easily folded up. First the reinforcement parts are removed and the bow and stern form Parts open to the outside, the sides then pull by themselves as a result of the bending creases inwards. Then the bottom is folded along the folds in such a way that the Flexural folds move upwards and the boat is symmetrical with respect to the center line The float is also folded up and along Folded in a line, a boat like this can easily be brought anywhere it is needed and is not only for leisure and play, but also for emergencies such as floods and other disasters well suited.

The known, portable and foldable boat described above has the disadvantage that there is no construction that stiffens the entire outer skin it is not possible to use this principle of folding a boat that is sufficiently stiff in size for more than four people. For this reason also the available transport space is kept very small and the floating body, oversized as a stiffening element. So this is not all because of the User safety but also because the stiffeners in relation to the usable space Must be disproportionately large and are indispensable. For this reason, the float must take up almost a third of the total boat volume.

However, this solution does not come about without loosely inserted stiffeners which are only connected to the hull for assembly.

This requires a multi-part construction, which in turn results in transport losses favored by individual parts.

The plastic sheet material used is four in proportion stiff.This fact suggests that the boat is generally on the intended hinge points can be poorly durable and especially when folding and The build-up must break at these points, so these hinge points must break through Pre-embossing of the folds can be made more permanent.

This is also the case when using plastic sheets made from polypropylene Otherwise, the proposed material will have multiple bends also on dn do not survive the pre-embossed areas. If the plastic material were more elastic again, so in turn, the side walls become too unstable for a load from oarlocks and banks.

t; in other collapsible boat is already in DE-OS No 25 32,966. It is integrally molded from a flexible plastic material and has a floor lying in a single plane through a straight rear side and a few symmetrical sides running towards the tip of the boat is.

A port wall and a starboard wall each go from one of the two mutually symmetrical sides so that they lie above the ground and their end edges are opposite to the imaginary lines on both sides.

A stern is with a first rear part in the form of an isosceles right triangle that has the straight side of the floor as a base and v-) n this one goes out in the same plane as the ground, with a second and with one third rear part, in each case starting from the associated triangle sides of the same length the first stern part foldable and integrally connected to the port or starboard wall end edges on both sides of the imaginary line will be opposite-will be above the Bottom folded port and starboard walls raised at right angles, too the first rear section erects and forms an angle of with the beden approximately 900 The rear part then takes on a common with the second and third rear part Bbene a vertical position. In this way the boat is erected. Between the port and starboard walls of the deployed boat are a plurality of beams or plates are used, which the said walls against the hydrostatic pressure Make sure that the boat maintains its erected shape. The joists or panels serve as seats and leave on the port and starboard walls by means of on the inside formed webs or ribs, in which they with their engage opposite ends.

This well-known blown boat should be in collapsed State as a self-supporting, self-supporting hollow body made of plastic, similar to one Bottle are used, have a high inherent stability, but also not a boat represent. According to this known solution, as proposed by the inventor, this is this Hollow body, however, completely split in the middle on one of its long sides or slashed.

So this solution already has the significant disadvantage of missing Dimensional stability burdened. The inventor of this solution therefore tries to solve the problem to counter lack of dimensional stability by the fact that he aur the boat hull in this way forms and at the same time creates a dimensional stability that he specializes in the two unstable edge areas of the side walls against the restoring forces of the plastic material, spreads apart and in between the bars or bench seats.

However, this solution cannot be satisfactory because it is used as a hull A plastic is used which, like thermoplastics in particular, only has a low durability against deformations under the influence of heat, e.g.

the ultraviolet radiation of the sun, and soon its internal stress loses by adapting itself plastically to the forced new form. On the other hand, can the inserted blank no longer than sufficient stiffening against the acting on the side walls hydrostatic pressure of the water and that occurred through the splitting of the hollow body in the longitudinal direction Do not sufficiently compensate for the instability of the side walls namely one side wall is loaded by the water pressure and the other is relieved Consequence occurs through the one-sided pressure of the water, in spite of the transverse stiffening Benches, a parallel displacement of the unstable side walls in relation to the floor of the The boat moves in towards the unloaded side. The side moves onto the hull The hitting wave then continues to under the longitudinal groove in the floor, then it practices there an additional high pressure on the already due to the spreading of the side walls relaxed bottom of the boat, causing it to arch through at first and then buckles.

This has the consequence that the unstable side walls are even more outward As a result, they lose weight due to the weight of those sitting on them Individuals suddenly strained benches on their supporting bearings on the inside the side walls and fall through, after which the entire boat returns to its original flat, collapsed shape finally returns through DE-OS No. 29 43 589 yet another folding boat with an outer skin made of a single sheet of sheet metal or plastic has been made known, the outer skin of which has edges which according to The shape of the boat is tailored to the specific shape of the boat also significantly in a well-known manner by an essentially from SpanLen, longitudinal reinforcements and skirting boards determine the existing scaffolding assembled boat in a number of places releasably connected to the boat skin is, so that the frame, together with the supporting boat skin, is box-shaped On the inside of the foil forming the boat skin there are protrusions, bolts, rivets or other suitable means for a detachable but test connection of the boat skin provided with the boat frame.

The longitudinal stiffeners are connected to the loin by means of bolts The film of the boat skin is attached to the holding unit parts in the form of short straps Stop the lugs, which provide a firm connection between the lanyards and the foil to ensure.

This portable and foldable boat is a well-known solution with the disadvantages of the long construction time, the complexity of the construction as a result the multitude and diversity of the individual construction elementsXwith the danger the loss of individual parts and the heavy weight of the entire boat represent.

As a result, it is also not used as a dinghy on yachts or the like.

It can be used for immediate and quick use only when it is open State ready and all its advantages as a folding boat are only due to the transport and limited storage when folded.

The individual parts of the scaffolding and the boat skin must be in special The manual transport without a vehicle is due to the high weight and bulkiness, despite the collapsibility, cumbersome The streamlined shape allows higher driving speeds, but is unsuitable for high loads, because there is a considerable risk of tipping over due to the narrow hull of the boat and the shape for folding it is not the most favorable. The usable space of the boat is quite small in relation to the effort.

OBJECT OF THE INVENTION The aim of the invention is to develop a lighter boat, which can be done very quickly and easily by one person.

a traybaren package is collapsible, with its other stability properties should not be inferior to those of well-known boats.

The boat should also, with the lowest possible sigen mass over have the largest possible usable space, allow the best possible volume utilization and largely be unsinkable.

Furthermore, the construction and the clamping mechanism should be very simple and the dimensional stability should only occur after clamping.

It should have permanent dimensional stability and also in adverse weather Quickly usable. L'in should comfortably sleep two people next to each other be possible in the open boat.

Statement of the essence of the invention The object of the invention is to be found based on avoiding the shortcomings of the known solutions described above and a collapsible, preferably pontoon-shaped hull with an outer skin and to develop clamping frame or framework without many additional loose parts can be opened quickly and easily by one person of stiffening structures made of plastics, due to the lack of permanent dimensional stability can be completely dispensed with.

The tension of the outer skin of the boat hull is intended to act as a counterforce Deformation forces counteract by the hydrostatic pressure, in connection with a metal construction designed as a frame or framework that can be clamped is.

The ratio of usable area to the total size of the boat hull is intended be improved and a full utilization of the floor area should be made possible.

In the event of partial destruction of the clamping frame or framework, should the hull still has a certain dimensional stability due to the outer skin.

As a dinghy for other water vehicles, e.g. for yachts, the hull should be suitable for short periods of time in the water without traverses or David be bringable.

If necessary, the hull should also be tensioned when in the water floating boat hull be possible quickly and even in adverse weather should the boat. in as short a time as possible, (time required no more than about two Minutes) and, thanks to its very low weight, can also be transported on a bicycle be, with it for Reisse im inland, for water hikes and also to be worthwhile water should be particularly suitable, and its structure should also be in smaller rooms, milk no bigger than his External dimensions are, be possible.

According to the invention, the foldable, preferably pontoon-shaped Boat hull with outer skin and tensioning frame or framework with articulated connection, spreading, tensioning and Stiffening elements which determine the final shape of the boat hull, designed so that all items of the SpanngesLells or the like are interconnected and that the entire clamping frame 1, or at least most of the same, with The rest of the outer skin is connected so that it can be stretched together with the outer skin and can be folded up again.

This feature of the invention is best that the clamping frame or framework, at least for the most part, firmly connected to the outer skin and together with this it can be relaxed and also collapsed again, using the example the well-known umbrella explainable. Even with the well-known umbrella the upholstery fabric is to a large extent fixed to the umbrella frame and the parts of the umbrella frame and in turn inextricably linked, with the cover fabric with your umbrella or tensioning frame for use quickly and easily, according to the use but then, for the purpose of a space-saving storage, storage or carry them in relatively small, handy bags or covers, as well can be quickly and easily collapsed together again.

Another important feature of the invention is how the clamping frame or framework of the boat hull is formed so that it is together with the outer skin can be opened and collapsed quickly and easily.

For this purpose there is a clamping frame or the like. from a back and a starboard-side profile frame, which is formed for example from light metal tubes and has lower bottom struts and upper longitudinal struts, which bus3- and are connected to each other at the rear by a connecting strut.

between this profile frame of the port and starboard wall are bow and stern cross connections, for example upper bow-shaped curb cross struts, arranged, which are in operative connection with spreading and clamping elements or even as spreading and tensioning elements are designed for the outer skin of the bow and stern walls.

These cross-connections can be rigid both in themselves and in their Length excessively in relation to the outer skin of the bow or stern wall than also flexible, for example, can be buckled towards the interior of the boat hull, however be able to step out in the extended position.

If the cross connections are rigid, then they are only on one side, for example only on the bow and stern connecting struts of the profile frame of the port wall, hinged.

But if the cross connections are flexible, for example to the interior of the hull can be buckled, but designed to be stiffened in its extended position: are, then they are on both sides, for example on both the bow and stern sides Connecting struts of the profile frame of the starboard wall to the interior of the boat hull can be folded in, articulated.

Another feature of the invention is a longitudinal connection between the front and rear walls of the tensioning frame, for example one between the bow-side and the stern transverse strut extending bow-shaped keel strut, which runs in the longitudinal center of the bottom of the hull along this bottom and bow and stern sides with bends upwards in the middle to the bow and stern side cross struts so that they are guided it is firmly or if necessary also articulated. These longitudinal connections, for example the ki l brace are divided transversely along their length and have free ends at the same time Parts of adjustable, easily and quickly releasable expansion and tensioning elements for tensioning the outer skin of the hull and in particular the bottom and the bow and stern wall, wherein these longitudinal connections with the cross connections of the front and rear walls, in particular by their expansion and clamping connections in the way in action stand that with the tensioning of the skin of the boat hull lengthways through the Spreading and clamping elements of the longitudinal connections at the same time also the spreading and Tensioning elements of the cross connections are actuated and thereby also the tensioning of the outer skin the bow and stern wall is effected.

Di rigid in itself, for example, designed as tubular brackets and bow and stern curb struts consisting of a drawn-in piece of light metal tube are on the one hand on one side, for example with one of its turns on the connecting struts of the profile frame of the port wall to the interior of the boat articulated so that they can be swiveled in, on the other hand they stand, for example with their others Bends, with notches and contact surfaces on the opposite connecting struts of the profile frame of the starboard wall in operative connection such that it is an excess in length in relation to the outer skin of the bow and stern walls, in the notches or on the contact surfaces inclined at an angle, bracing, spreading and Tensioning elements for tensioning the outer skin of the bow and the stern wall between the bow and the stern Form starboard wall.

The flexibly trained and bilateral both on the port side also linked to the side wall, for example those as tubular brackets made of light metal and formed with bends at their ends upper curb cross struts are on both sides about their middle by a sloping cut under one Angle of inclination to its central axis and inclined to one another, divided into 3 parts; see above that between the free ends tubular spacers as expanding and clamping elements are arranged with opposing inclined clamping surfaces. The loose parts, that is the end portions of the cross connections and the spacers would fall apart and could be lost. That is why they are longitudinally elastic with one another Elements for example a tension spring, flexibly collapsible according to the boat body interior here and there firmly connected to the outer skin of the bow and stern walls.

As a result, the cross connections are common to the outer skin of the Front and rear walls can be expanded and collapsed.

The intermediate pieces of the flexible cross connections, for example board cross struts, are in place with their sloping clamping surfaces on both sides and the opposing ones as well inclined clamping surfaces of the free enders, the cut cross-ribs, rotatable in sleeves, in operative connection, the sleeves as stiffening elements for the flexible ones Cross connections are on both sides of the ends of the longitudinal connections, for example The keel strut is arranged to be displaceable on the cross connections and is designed to be rigid made of light metal tube.

With the help of these sleeves, the transverse reinforcements are if necessary can be stiffened and the spacers are rotatably guided in these.

Similarly, the end portions of the lengthwise direction are also preferred in the middle, transversely divided longitudinal connections, for example the front and rear ends the keel strut, preferably either articulated in the middle with the rigid transverse struts or firmly connected to the intermediate pieces.

Approximately in the middle of the longitudinal connections, for example the keel brace, is an adjustable, easily and quickly releasable, toggle-like, in its extended position easily and quickly stiffened expansion and tensioning element be an intermediate piece, which is created when the in the shape of a bracket Light metal tube formed stable keel brace through each cutting cut about on both sides of its center and at an angle to its longitudinal center axis, as well also the dividing lines at an angle to each other (- 'i gt, cut through are.

Between the free ends of the resulting bow and stern Kiel. Strebentei le with inclined clamping surfaces is now the tubular intermediate piece and its also inclined clamping surfaces arranged and with the stern-side keel strut part by a longitudinally elastic element, for example bendable, connected in such a way that the inclined clamping surfaces of both parts due to the elastic force of the tension spring lie against each other. The tension spring is advantageous in the inner cavity the stern keel strut part and the intermediate piece arranged and with a Spring end fastened to a spring bearing, for example on a screw, which the free end of the stern part of the keel strut passes through. Its other end of the spring is on a spring bearing inside the intermediate piece, for example on one of the Intermediate piece penetrating screw hcfestigt. This is the stern keel strut part and the intermediate piece can be flexibly bent and the intermediate piece cannot get lost.

This flexible kink-hard connection in the form of an expanding and clamping element is in its extended position by a stiffening element, for example a tubular sleeve, which can be moved lengthways, can be stiffened quickly and easily.

The bow-side keel brace part, on the other hand, has its free end and side beveled clamping surfaces only with the beveled clamping surfaces of the Intermediate piece in operative connection when the stiffening element, for example the Rigid sleeve is also pushed over it and is in the extended position, according to The sliding of the sleeve, for example towards the rear, is easily done without further ado and quickly detachable from the intermediate piece, i.e. the keel strut or the like at this point Separable. In the stretched and stiffened position, the sliding part is located Stiffening element, for example the rigid sleeve, so both over the otherwise free beveled ends of the bow and stern keel struts parts and the intermediate piece and stiffen, for example, the keel brace at these kinkable separation points.

Another feature of the invention is that the stiffening element is used , for example, the rigid sleeve together with the intermediate piece at the same time also designed as a spreading and tensioning element to separate the bow and the stern wall to spread and tension the outer skin. This is the purpose of the stiffening element aur the free ends of the bow and stern side keel brace parts, which the beveled Clamping surfaces have, rotatable about their central longitudinal axis and an elongated opening, for example an elongated hole is provided in the sleeve so that it can be worn on both sides as far as the limit n this breakthrough limited to a fixed projection or approach on the intermediate piece Can be moved lengthways on the beveled ends of the bow and stern keel brace parts and on the intermediate piece, but not rotatable on the latter. Such a solid, in the example elongated hole of the sleeve, protruding solid projection or approach can, for example, a protruding head of the intermediate piece transversely be enforcing screw.

By means of the stiffening element, the intermediate piece is between the beveled ends of the longitudinal connections, for example the front and rear ends Kiel.strebenenden, with its also beveled clamping surfaces, rotatably guided and as a result, the keel brace, for example, can be adjusted to be extended, i.e. the tensioning force selectable for tensioning the outer skin.

The other free end of the bow-side keel brace part which with its beveled clamping surfaces and the clamping surfaces of the intermediate piece only is in operative connection but is not connected to it, has projections on the outside or projections. Such projections or projections can also, for example, the above The ends of a bolt penetrating the keel strut end for a non-rotatable locking has the longitudinally displaceable stiffening element at its bugseitenetl end, for example slot-shaped recesses or cutouts, which the fixed projections or lugs on the bow-side part of the keel brace, for example, i.e. the protruding bolt ends in the stiffening and torsion-proof position. This securing against rotation is necessary so that with the longitudinally displaceable stiffening element, for example the sleeve, non-rotatably connected intermediate piece is not located between the inclined clamping surfaces the keel-striving, together with the sleeve, can twist automatically and none unintentional lengthwise rotation of the keel brace, for example, with a decrease in the Tension the Outer skin can occur.

Of course, the recesses at the bow end of the stiffening element to prevent longitudinal displacement of the stiffening element and thus unlocking the anti-twist device must also be angled at right angles, similar to the Bayonet locks already known and the sleeve also inside the solution connections, for example the keel brace be arranged displaceably.

According to a further variant of the inventive concept, the bug and stern rigid in itself and with the bow and stern ends of the example Keel struts preferably in the middle, cross connections connected by hinges, for example Curb cross struts, with oversize in their width, also on both sides, so both on the one hand with their bends in elongated hinges with notches and inclined contact surfaces with notches on the port wall, for example, as well as with other turns Notches and on inclined contact surfaces of the profile frame of the starboard wall, for example supporting itself, at the same time with the longitudinal connections, for example the keel strut, in Active connection standing expansion elements between the side walls and clamping elements for the outer skin of the bow and stern wall.

In this version, the additional spreading takes place the side walls and the tensioning of the outer skin of the bow and stern wall directly in dependence from the netseiteuncder expansion and tensioning elements in the longitudinal connections via de approximately in the middle of the transverse connections articulated ends of the longitudinal connections, for example Klelstreben. -When the hull of the boat moves in the water, the forehead resistance can cause it of the water, the bow or stern wall extends inwards towards the interior of the boat bulge in and over the protruding sharp, front and rear edges of the thereby the sloping contact surfaces extended profile frame of the drop side due to excessive loads tear down.

To prevent this, it is advantageous to use the rigid, bow and stern sides Cross connections, for example the curb cross struts with a kink to the outside to provide, whereby the outer skin of the bow and stern wall bulges between the side walls stiffening and tensioning.

In a generalization of the inventive concept, the longitudinal connections instead of a stable middle keel brace, as is known per se in many folding boats, with a ladder-like shape formed several longitudinal struts and solid rung-like cross connections, bow-shaped curved, in the middle the length divides transversely and in between there is also an Known toggle-like, foldable, adjustable, easy and quick, for example expandable and separable by means of longitudinally displaceable stiffening elements Clamping elements be arranged if according to the basic idea of the invention all items of the entire clamping frame or the like. connected with each other and the entire clamping structure or at least the predominant part thereof, with the Outer skin is firmly connected, can be stretched and collapsed together with it, From this point of view, all other conceivable variations of Cross connections, also with their spreading and clamping elements for spreading apart the side walls for tensioning the outer skin of the bow and stern wall with the longitudinal connections in various design options, depending on the actuation of the Spreading and tensioning elements of these longitudinal connections for spreading the bow and Rear wall and for tensioning the entire outer skin in the longitudinal direction, in operative connection are included in the basic principle of the invention.

The stretching and folding of the boat hull according to the invention happens as follows: The folded flat in the preferred starting position with a side wall, for example a port wall or the like lying on the floor Boat body, consisting of the outer skin and the clamping frame connected to it or the like unfolded and stretched by placing the lower oddgl on the floor.

lying north wall, for example the port wall loaded with one foot and the other upper drop side, for example the starboard side, raised by hand and thereby the outer skin of the bow and stern wall, including those connected to it Cross connections, for example @ the front and rear Curb struts ent @ aged until there is resistance from the tensioning outer skin of the bow and stern walls and the floor becomes noticeable.

Then the entire hull is moved from the side position to the position of use tilted and with its bottom on the earth, the water or the like. Surface of the clamping location discontinued.

Nuri can walk on the bottom of the hull.

Are the cross connections, for example the front and rear Board cross struts in and of themselves rigid and with one side on one side Drop side, for example hinged to the port side, then become the opposite cross connections and the outer skin connected to them the front and rear walls around the pivot axis of the hinges on one of the ship's sides, for example the port wall is pivoted into its Quciststellung between the two side walls until its free end, for example, its turning behind the connecting strut of the Profile frame of this side wall, for example the starboard wall, snaps into place and itself at the same time supported against the inclined contact surface.

Now the free, adjacent ends of the longitudinal connections For example, the bow-side keel strut part and the stern-side keel strut part with your intermediate piece, for example, and the longitudinally displaceable stiffening element, for example the sleeve, lifted by hand and the inclined clamping surfaces of the bow-side part the longitudinal connections, for example of the keel strut part Init the inclined clamping surfaces the one with the stern longitudinal connections, for example the stern keel strut parts Expanding and tensioning elements connected in an articulated manner, for example the intermediate piece with the pushed-on stiffening element, for example the sleeve in operative connection brought. (Fig. 9).

Now the entire toggle-like spreading and clamping element is included the raised parts of the longitudinal connections, for example the bow and stern sides Keel strut parts pressed down against the ground in the extended position and stiffened, in which the stiffening element, for example the sleeve over the kink connection to be stiffened is pushed.

The stiffening element then becomes, for example, the rigid one Sleeve with the spreading and clamping element located on it, for example the intermediate piece up to a noticeable resistance on the free ends with chipped clamping surfaces the longitudinal connections, for example the keel strut ends rotated and with the fixed Projections or approaches, for example the bolt ends on the bow-side longitudinal connections, for example Bow-side keel brace part by longitudinal displacement, locked against automatic rotation at the same time the longitudinal connections, for example the keel brace, are attached to the bendable ones Separation points stiffened.

The by twisting the stiffening element and by the non-rotatable with it connected expansion and clamping elements caused extension of the example The keel brace and the spreading of the bow and stern walls are carried out at the same time Tensioning the entire outer skin, especially in the longitudinal direction of the hull.

Since the cross connection, for example the bow and stern edge cross brace, n, at this spreading apart through the longitudinal connections, on the one hand at the inclines Contact surfaces of the elongated hinges on one side wall, for example the Port side and on the other hand on the inclined contact surfaces of the other side wall, for example Support yourself on the starboard wall and move along these contact surfaces At the same time another additional spreading of the port and starboard walls and thus additional tension in the outer skin of the bow and stern walls in the transverse direction .

If- the cross connections, for example the bow and leak side Board cross struts are designed to be flexible, for example, foldable, is raised in the same way as already described, the lower side wall lying on the ground, for example the port side loaded with one foot and the other overhead board wall, for example Starboard wall raised and thereby the outer skin of the bow and stern wall including @ch unfolds the flexible, bendable cross connections associated with it.

Then, in the same way as described, the hull of the boat is put into his Tilted position of use, with the ground on the ground, the water or the like and settled the ground is stepped on.

now the flexible cross-connections become, for example, the flexible ones foldable curb cross struts, by means of the stiffening elements, for example - the ' Longitudinally displaceable, rigid sleeves on both sides of the with the expanding and clamping elements, for example the intermediate pieces firmly connected to the bow and stern keel brace parts, up to the keel strut ends, for example, pushed up and thereby the flexible cross connections stiffened.

The tensioning of the entire outer skin of the boat hull in the transverse direction takes place simultaneously with the downward pivoting of the two IEolstrebenender "whereby a rotation of the intermediate piece ar the board transverse strut ends around the axis x (see Fig. 4) The clamping surfaces of the keel struts, for example, permanently connected intermediate stiles occur with the also diagonally trimmed clamping surfaces the transverse struts in action, causing the bow and stern walls to spread apart caused.

The tensioning of the entire outer skin of the boat hull in the longitudinal direction by the longitudinal connections, for example by the knee-cuff-like spreading and Clamping element is now, as already described in the same way, in which the free End, for example of the bow-side keel strut part and the end of the stern-side Keel strut part with the spreading and tensioning element and the stiffening element, for example the longitudinally displaceable, rigid sleeve with the inclined clamping surfaces on the bow side The keel strut part and the intermediate piece are brought into operative connection (see Figs. 8 and 9j.

The toggle-like spreading and tensioning element is then also used in the same way with the parts of the longitudinal connections, for example those that can be pivoted up and down bow and stern keel strut parts down against the ground in the extended position The stiffening of the flexibly bendable longitudinal connections, for example the keel struts now also take place, as already described, in the stiffening element, for example the longitudinally displaceable, rigid sleeve is pushed over the separation points so that the More exciting entire outer skin in the longitudinal direction and the extension the longitudinal connections, for example the keel brace, by turning the ;. Stiffening element and the and of the expanding and clamping elements, for example an intermediate piece and its twist locking with the fixed projections, e.g. the pin ends of the bow-side keel strut part takes place.

An automatic unlocking and longitudinal displacement of the stiffening element, for example the sleeve on the keel strut is in the extended position when the hull is open hardly possible because the taut outer skin of the floor, due to the hydrostatic Pressure of the water against the strut for example keel and sleeve and thereby existing friction between the outer skin and sleeve, the latter sufficient against self-acting Unlocking is secured.

For additional locking against longitudinal displacement of the Sleeve can by angled the recesses of the slot ends in the right Angle, whereby the bolts could be locked in a bayonet-like manner.

If there is a decrease in the tension of the outer skin after a long period of use of the boat can by further twisting the stiffening element and the Spreading and tensioning element of the longitudinal strut, a further extension of the longitudinal connections take place, and if that is no longer sufficient, the expansion and tensioning element, for example the intermediate piece, one with an excess length can be exchanged.

The hull is essentially folded up in reverse Order in which the toggle-like expanding and clamping element is unlocked first, and for example by longitudinally shifting the stiffening element, the connection is released, then the detached front and rear parts of the longitudinal connections, for example the keel strut parts are pulled inwards and placed next to each other (see Figs. 7 and 8). After that, the stiffening elements of the flexible cross connections were also moved were, with the bow and stern cross connections to the boat hull interior can be swiveled in or kinked in and t them also the welded-on The outer skin of the bow and corner wall connected by flaps is folded in (see Fig. 7). The hull folded in this way is now placed on the port or starboard wall and is easy to transport because it takes up little space.

The invention is to be described in more detail below using several exemplary embodiments explained.

In the accompanying drawings show; Fig. 1: The perspective view of the pontoon-shaped hull with the outer skin and the clamping frame, in which all individual parts are interconnected and the majority of the Clamping frame is firmly connected to the outer skin; Fig. 2: the perspective view of the clamping frame with the intrinsically rigid bow and stern edge cross braces and the hinges, as well as the contact surfaces on the profile frame of the side walls Fig.3: the Perspective view of the clamping frame with the flexibly foldable, bow and on the stern on the connecting struts of the port wall, on the other hand on those hinged to the starboard wall Fig. 4: Detail A according to Fig. 3 (cross struts with intermediate piece and sleeves) Fig. 5: Detail B according to Fig. B (keel strut with Spreading and clamping element in the release position Fig. 6: Section A-A according to Fig. 5 (extended position) Fig. 7: the perspective view of the clamping frame with the flexibly foldable, buy and Rear board transverse struts and those that can be opened and collapsed together with them Outer skin Fig. 8: the perspective view of the clamping frame with the up and down swiveling keel strut parts and the expansion and tensioning element with the retracted Sleeve before folding or unfolding the hull Fig. 9: the detail C according to Fig. 8 with spacer, sleeve and both free ends of the keel strut.

Figures 1; 3; 7 and 8 clearly show how the individual parts of the entire clamping frame, namely the port and starboard side profile frames the bottom struts 1 and 2 as well as the board longitudinal struts 3u.4 consisting of the bow and stern sides by a connecting strut 5; 6 and 7; 8 firmly together tied together and the two profile frames 1; 3; 5; 7 and 2; 4; 5; 8 at the front and rear, one below the other by the upper bow-shaped border cross struts 9 or arranged between them 9 'and 10 or 10' and the hinges 21 or 21 'and 22 or 22' and 29 and 30 mobile, but also connected to each other, including the middle one The keel strut 14 'stands with its bow-side end 14' with the bow-side curb cross braces 9 or 9 'and with its rear end 14 "with the rear curb cross brace 10 or 10 'in connection.

The fixed connection of the majority of this clamping frame with the outer skin 46 through the welded tabs 42; 43; 44 and 45 show on Figures 1 and 7 are best.

In particular in FIG. 7 it is easy to see where the outer skin is 46 can be clamped and collapsed together with the clamping frame.

Like the rigid bow-shaped upper board cross struts 9 and 10 between the two profile frames 1; 3; 5; 7 and 2; 4; 6; 8 are arranged and with Spreading and clamping elements are operatively connected to the profile frame, is from the Fig. 2. Here you can see how the bow-shaped bow and stern curb cross struts 9 and 10 with their port-side turns 19 and 20 on the bow and stern sides Connecting struts 5 and 7 of the profile frame 1; 3; 5; 7 of the chopping board wall, in the elongated tubular Eyes of the hinges 21 and 22 attached to the interior of the boat hull so as to be pivotable are.

The other variant with the flexibly foldable board cross struts 9 'and 10' is shown in Fig.3.

These transverse struts 9 'and 10' are, as can be seen, with their bends 19 and 20 on both the bow and stern connecting struts 5 and 7 of the profile frame 1; 3; 5; 7 of the port wall as well as with the other turns 23 and 24 on the bow and Rear connecting struts 6 and 8 of the profile frame 2; 4; 6; 8 of the starboard wall by means of the hinges 21 '; 22' and 29; 30 towards the interior of the boat hull attached.

The bow-shaped keel strut 14 between the bow wall 11 and the Rear wall 12 as a longitudinal connection and extension of the outer skin 46 in the longitudinal center of the bottom 13 of the hull is arranged, shows when the hull is stretched the Fig.1 Your course in the longitudinal center of the floor 13 and along the middle of the bow wall 11 and the stern wall 12 up to the rigid curb cross struts 9; 10 or the flexibly foldable curb struts 9 '; 10' 'are also well made from the Figures 2 'and 3 can be seen. In Figure 2, the joints 15 and 16 to see with which the keel brace 14 with the rigid bow and stern sides Bordquerstreben 9 and10 is connected scliwenkbar.

The transverse division of the keel brace 14 approximately in its middle and the free nn 17 and lt of the split keel brace is best shown in Fig. 8.

The adjustable, easily and quickly releasable toggle lever element 17; 18; 61 to 67 and the way in which the free ends 17 and 18 of the keel strut 14 at the same time are designed as part of this toggle lever element is shown in the figures 5 and 6 larger and also illustrated in section in FIG.

to detect the interaction of the bow end 14 'of the keel strut 14 with the spreading and clamping elements 39 to 44 of the flexibly bendable ones Bordersreben 9 'and 10' for the purpose of stretching the outer skin 46 of the bow wall 11 and the rear wall 12 are particularly Figures 1; 7; 8 and 9 suitable.

Of these, FIG. 1 shows the open hull, FIG. 7 the close to folded hull with the free ends lying next to each other 17 and 18 of the keel strut and the free ends 17 and 18 of the keel strut and the figures 8 and 9 show it in the relaxed intermediate position with the toggle lever element released 17; 18 and 61 to 67 of the keel brace 14.

The interaction of the bow and stern ends 14 'and 14' 'c.r Keel strut 14 with: the rigid bow and stern transverse ribs 9 cattle 10 and their interaction in turn with the front and rear spreading and clamping elements21 to 28 on the profile frame 1; 3; 5; 7 and 2; 4; 6; 8 of the port and starboard wall is the Refer to Fig. 2.

In this Fig.2 the rigid design of the bow and stern are clearly visible Upper board cross struts, which are bow-shaped, made from a single piece of light metal tubing are made and on both sides, i.e. on the one hand with their turns 19 and 20 behind the connecting struts 5 and 7 of the profile frame 1; 3; 5; 7 of the port wall engaged in notches 25 and 26 under the tension of the outer skin of the bow and stern wall are articulated as well as in the elongated, tubular eyes of the hinges 21 and 22 and at the same time on the contact surfaces inclined at an angle to the longitudinal strut 1 27 and 28, support themselves, but on the other hand with their other turns 23 and 24, behind the connecting struts G and 8 of the profile frame 2; 4; 6; 8 also below the tension of the outer skin in the notches 25 'and 26' latching on the other, under the angle # 'to the board longitudinal strut 4 and to the contact surfaces 27; 28 inclined whose contact surfaces 27 'are supported as expanding elements between the profile frames the port and starboard walls and at the same time as a tensioning element for the outer skin of the Bow and stern walls are formed, and like these at the same time also the niit of Keel strut 14 cooperating expansion and tensioning elements 19; 20; 23 to 28 and 21 '; 22'; 23'bis 28 'are.

In Figures 3 and 4 it is shown how flexible and foldable trained, front and rear, on both sides, so both on the profile frame 1; 3; 5; 7 of the port wall, as well as the profile frame of the starboard wall through the Hinges 21 '; 22' and 29; 30 hinged curb cross struts 9 '; 10' on both sides for example their center by a separating cut 31; 32 and 33; 34 at an angle α are cut through to their longitudinal center axis x and also inclined to one another.

It can also be seen there how between their free ends 35; 36 and 37; 38 the tubular intermediate pieces 39 and 40 with their beveled clamping surfaces 47 to 50 are arranged as spreading and tensioning elements and like the free ends 35 up to 38 of the bow and stern edge transverse struts 9 'and 10' with the intermediate pieces 39 and 40 can be flexibly bent by the tension spring 41 arranged inside and the outer skin 46 of the front and rear walls 11 and 12 through the welded-on tabs 42 to 45 for the most part with the transverse struts 9 'and 10' together with it The folding is clear from Fig. 7 evident.

The rotatable arrangement of the intermediate pieces 39 and 40 in their longitudinal center axis x and with their inclined clamping surfaces 47 to 50 between the inclined clamping surfaces 51 to 54 of the cut transverse ribs 9 'and 10' as well as the rigid, lengthways sliding sleeves 55 to 58 as stiffening elements are enlarged in the Fig. 4 shown.

There is also the fixed connection of the intermediate piece 39 with the The bugseitiqen end 14 'of the split keel strut 14 can be seen well.

The other variant with the rigid bow and stern transverse ribs on the board 9 and 10 is shown in Fig. 2. There you can see how the bow and stern ends 14 ' and 14 ″ of the keel brace 14 through the joints 15 and 16 up and down as well as towards and swiveling (see arrow direction) connected to the rigid curb struts 9 and 10 are.

Figures 5 and 6 show enlarged and clearly that between the free ends 17 and 18 of the centrally divided keel brace 14 arranged, slightly and quickly detachable, adjustable, toggle-like, easy in its extended position and quick-stiffening expansion and tensioning element. As can be seen, the keel brace 14 about in their middle by two separating cuts 59 and 60 at an angle to theirs Longitudinal central axis y and that the separating cuts run inclined to one another.

Between the inclined clamping surfaces 61 and 62 at their free ends 17 and 18 is the tubular intermediate piece 63 with the likewise bevelled Clamping surfaces 64; 65 arranged.

As can be seen, the one free end 18 of the rear part of the The keel strut 14 with the intermediate piece 63 can be flexibly bent by the tension spring 66 tied together.

The other free end 17 of the bow-side part of the keel strut 14 with the clamping surface 61 is from the bow-side clamping surface 64 of the intermediate piece 63 easily separable, as FIGS. 8 and 9 show.

The rigid sleeve 67 is on the stern part of the keel strut and the intermediate piece 63 arranged to be longitudinally displaceable. The elongated hole 68 in the sleeve 67 can be clearly seen in FIGS. 5 and 6, as can the intermediate piece 63 penetrating screw 69 as well as the bow-side part of the keel strut 14 penetrating cylindrical bolts 70 with the protruding bolt ends 71 and 72 which in the longitudinal slots 73 of the sleeve 67 in the stiffened stretched position the connection according to Fig.6 intervene.

Loss of the intermediate piece 63 and the sleeve 67 can occur in the release position do not take place (Fig. 5), because these parts are supported by the bolt 69 and the tension spring 66 are flexibly kinkable but not detachable from one another.

Finally, FIG. 9 shows an enlargement dt-r Linzelheit C nor the interlocking and interaction of the bow-side, rear-beveled ones free end 17 of the keel strut 14 with the bow-side end of the sleeve 67 when depressed these two ends in the direction of the arrow up to the extended position (Fig. 1; 2; 3; 4; 5) of the keel strut 14 down on the bottom 13 of the hull for the purpose? of tensioning the hull, wherein the mentioned toggle-like effect of the spreading and clamping element occurs tensioning is much easier.

The kinks 74 and 75 of the bow and stern sides that are visible in FIG Edge struts 9 and 10 cause bulging, tension and stiffening of the Outer skin 46 on the bow and stern walls 11 and 12. This reduces the frontal resistance of the vehicle when driving in the water and thus improves the driving characteristics and creates a usable space.

List of 1; 2 - bottom struts 3; 4 - longitudinal struts; 5; 6 - connecting struts at the front; 7; 8 - rear connecting struts; 9; 9 '- bow-side curb cross struts; 10; 10 - rear board cross struts; 11 - bow wall; 12 rear wall; 13 floor; 14 keel brace; 14 ';14''bow and stern parts of the keel strut; 15; 16 joints; 17; 18 -free ends of the keel strut; 19; 20 turns; 21; 21 ';22;22'; - hinges; 23; 24 turns; 25; 25 ';26;26'notches;27; 27 ';28;28' contact surfaces; 29; 30 hinges; 31; 32; 33; 34 separating cuts; 35; 36; 37; 38 -free ends of the cross connections; 39; 40 spacers; 41 tension spring; 42; 43; 44; 45; 46 tabs; 46 - outer skin; 47; 48; 49; 50 clamping surfaces of the intermediate pieces; 51; 52; 53; 54 -Tensioning surfaces of the free ends of the transverse strut; 55; 56; 57; 58 sleeves; 59; 60 severing cuts; 61; 62 clamping surfaces of the free ends of the keel strut; 63 intermediate piece; 64; 65 clamping surfaces of the intermediate piece; 66 tension spring; 67 -sleeve of the keel brace; 68 elongated hole; 69 screw; 70 bolts; 71; 72 bolt ends; 73 longitudinal slots; 74; 75 kink; -Angle ; x; y -longitudinal central axes; - L eide page -

Claims (14)

Claims: 1. Collapsible, preferably pontoon-shaped Boat body with outer skin and tensioning frame or framework with articulated connection, tensioning and Stiffening elements, which determine the final shape of the boat hull, are marked in that all items of the clamping frame or the like. connected with each other are and the entire clamping frame, or at least the majority of it, with the outer skin is firmly connected and thus stretched and together with it is collapsible. 2. boat body according to claim 1, characterized in that the clamping frame, or the like a back and a starboard side profile frame, for example made of light metal tubes (1 to 8) consists, the bottom struts (1 ;?) and board longitudinal struts (3; 4) at the front and rear are firmly connected to each other by a strut (5; 6 and 7; 8). Boat hull according to claim 1 and 2, characterized in that between the profile frame (1; 3; 5; 7 and 2; 4; 6; 8) of the stern and starboard wall at the bow and stern Cross connections, for example upper bow-shaped curb cross struts (9; 10 or 9 '; 10') are arranged, with spreading and tensioning elements (27; 28 and 27 '; 28') for the outer skin (46) are in operative connection or even with spreading and clamping elements (19; 20; 23; 24 and 35 to 40) of the bow and stern wall (11; 12) are formed. 4. boat body according to claims 1 to 3, characterized in that the cross connections, for example the board cross struts (9; 10), are inherently rigid are and only on one side, either on the port or on the starboard wall, for example the board transverse struts (9; 10) either only on the bow and stern connecting struts (5; 7) of the profile frame (1; 3; 5; 7) of the tailgate, for example by hinges (21; 22) or the board cross struts (9 '; 10') are flexible, for example, can be bent and on both sides, i.e. on both the port and the starboard wall, for example on both the bow and rear connecting struts (5; 7) of the profile frame (1; 3; 5; 7) the port wall @ as well as on the bow and stern Connecting struts (6; 8) of the profile frame (2; 4; 6; 8) of the starboard wall, for example are fastened by hinges (21; 22 and 29; 30), schwenkba @. 5. boat body according to claims 1 to 4, characterized in that also between the ßugwand (11) and the rear wall (12), for example between their Upper board cross strut (9 and 10), longitudinal connections, for example one in the longitudinal center of the bottom (13) and the bow wall (11) and rear wall (12) extending, bow-shaped Keel brace (14) is provided and this with the bow and transverse connections, For example, the board transverse struts (9; 10) if necessary by means of joints (15; 16), pivotable are connected. 6. Boat body according to claims 1 to 5, characterized in that that aie longitudinal connections, for example the keel strut (14) lengthways, transversely divided, the free ends (17; 18) at the same time components of an adjustable, easily and quickly releasable spreading and tensioning element, for example quick releasable toggle lever element are (17; 18 and 61 to 67) and the longitudinal connections, for example the bow-side End (14 ') and the stern end (14' ') of the keel strut (14) with the bow and stern sides Cross connections, for example with the spreading and clamping elements (39 to 44) for the outer skin (46) of the bow and stern walls (11 and 12) are in operative connection. 7. boat body according to claims 1 to 6, characterized in that with a rigid execution of the cross connections, for example the bow and rear-side upper board cross struts (9; 10) this, for example, bow-shaped from a single piece of light metal tube made, on both sides, so on the one hand with their Bends (19; 20) behind the connecting struts (5; 7) of the profile frame (1; 3; 5; 7) Supporting itself in notches (25; 26), pivotable towards the interior of the boat hull, for example in hinges (21; 22) in elongated eyelets, at an angle (#) to the board longitudinal strut (4) inclined contact surfaces (27; 28) are articulated, on the other hand, for example with their other connecting struts (6; 8) of the profile frame (2; 4; 6; 8) in notches (25 '; 26') and on contact surfaces inclined at an angle (tA) to the other edge strut (4) (27 '; 28') are supported as spreading elements between the profile frame of the back and Starboard wall and at the same time as tensioning element for the outer skin (46) of the bow and rear wall (11 and 12) formed with the longitudinal connections, for example the Keel strut (14) operatively connected expansion and tensioning elements (19; 20; 23; to 28 and 21 '; 22'; 25'to 28 ') of the bow and stern wall (11 and 12). 8. boat body according to claims 1 to 7, characterized in that in the case of a flexible, for example articulated, execution of the cross connections, for example the bow and stern transverse struts (9 '; 10'), these on both sides, so both on the port as well as on the starboard wall, for example by means of both hinges (21; 22) on the connecting struts (5; 7) of the profile frame (1; 3; 5; 7) as well as through Hinges (29; 30) strive to the connection (6; 8) of the profile frame (2; 4; G; 8) hinged are and on both sides about their middle by a separating cut (31; 32 and 33; 34) at an angle (0 ') to its longitudinal center axis (x) and inclined to one another are divided, between their free ends (35; 36 and 37; 38) the spreading and clamping elements, for example the tubular, beveled intermediate pieces (39; 40) are arranged, the free Ends (35 to 38) of the cross connections and the spreading and tensioning elements, for example the intermediate pieces (39; 40), flexibly foldable by means of longitudinally elastic clamping elements, for example a tension spring (41), as well as fixed in places, for example by welded-on Lugs (42 to 45) are connected to the outer skin (46), together with the outer skin (46), which are stretched and stretched are designed to be collapsible. 9. Boat body according to claims 1 to 8, characterized thereby the intermediate pieces (39; 40) of the flexible, for example kinkable, curb cross struts (9 '; 10') with their sloping clamping surfaces (47 to 50) on both sides between the opposing ones, likewise inclined clamping surfaces (51 to 54) at the free ends (35 to 38) of the severed Borders (9 '; 10') rotatable in stiffening elements, for example rigid Sleeves (55 to 58) are in operative connection, the stiffening elements in the area the separating cuts (31; 32 and 33j34) on both sides of the bow and stern end (l4 ' and 14 ") of the keel brace (14) on the cross connections, for example the sleeves (55; 56 and 57; 58) on the board cross struts (9 '; 10') longitudinally displaceable as well as the intermediate pieces (39; 40) are rotatably arranged in the sleeves (55; 56 and 57; 58). lO.Bootskkörpers according to claims 1 to 9, characterized in that the bow and stern ends (14 'and 14' ') of the transversely divided longitudinal connections, for example the keel brace (14), which is preferably split again at an angle in the middle either through joints (15; 16> movable with the rigid curb cross struts (9; 10) or fixed with the intermediate pieces (39; 40) of the flexible, for example, foldable Board cross struts (9 '; 10') connected as lever arms of a vorzuyt in the middle of the longitudinal connections, for example in the keel strut (14) arranged, easily and quickly releasable, adjustable toggle lever-like, in its extended position easily and quickly stiffened expansion and tensioning element (17; 18 and 61 to 67) and in the joints (15; 16) on the rigid cross connections, For example, the board cross struts (9; 10) or with the firmly on the hug and stern sides Ends (14 'and 14' ') of the longitudinal connections, for example the keel strut (14) Intermediate pieces (39; 40-) of the flexible, for example foldable, curb cross struts (9 '; 10') are arranged to be pivotable up and down. 11.Bootskkörper according to claims 1 to 10, characterized in that also the longitudinal connections, for example the keel strut (14) on both sides for example their center by a separating cut (59; 60) at an angle (ß) to their Longitudinal central axis (y) and sloping towards each other is ud between its free Ends (17; 18) with the inclined clamping surfaces (61; 62) the easily separable, toggle-like , in its extended position quickly and easily stiffened expansion and tensioning element, for example a tubular intermediate piece (63) with likewise beveled clamping surfaces (64; 65) is arranged, the one free end, for example the free end (18) of the The stern part of the keel strut (14) with the intermediate piece (63) by means of a longitudinally elastic Element, for example a tension spring (66), flexibly, for example, kinkable, connected and the other free end, for example the free end (17) of the bow-side part the keel strut (14) only with the associated beveled clamping surfaces (64) of the intermediate piece tk3) is in operative connection: and in the area of the separating cuts (59; 60) on the longitudinal connections, for example on the keel strut (14), a longitudinally displaceable Stiffening element, for example a longitudinally displaceable, rigid sleeve (67) from a piece of light metal tube, on the free ends (17; 18) of, for example: Keel strut (14) is rotatably arranged. 12.Bootskkörpers according to claims 1 to 11 'characterized in that the stiffening element, for example the sleeve (67) in the area of the intermediate piece (63) and the beveled free ends (17; 18) of the longitudinal connections, for example the keel strut (14) has an elongated opening, preferably a longitudinal slot or has an elongated hole (8), whereby it is longitudinally displaceable on a fixed projection or approach 'for example the protruding head of the intermediate piece (63) penetrating Screw (69) and the intermediate piece (63) by means of the sleeve; (67) between the beveled free ends (17; 18) of the longitudinal connections, for example the keel strut (14), rotatable is led. 13.Bootskkörpers according to claims 1 to 12, characterized in that the other free end of the longitudinal connections, for example the other beveled End (17) of the sugar-side part of the keel strut (14) with fixed projections or Approaches formed, for example penetrated by a cylindrical bolt (70) and the longitudinally displaceable sleeve (67) with recesses, for example Longitudinal slots (73) at its bow end with the fixed projections or lugs, for example the protruding bolt ends (71; 72) at the free end (17) of the keel strut (14) so that they cannot rotate is lockable. 14.Bootskkörpers according to claims 1 to 13 'characterized in that the intrinsically rigid, bow and stern edge transverse struts (9; 10) by a kink (74; 75) as a stiffening element of the outer skin (46), which is bulging at the bow and stern sides the bow and stern walls (11 and 12) are suitably designed.