WO2021040568A1

WO2021040568A1 - Foldable rigid inflatable boat

Info

Publication number: WO2021040568A1
Application number: PCT/RU2020/050181
Authority: WO
Inventors: Сергей Александрович ВЕРЕТЕННИКОВ; Андрей Дмитриевич ЧИЛИНГАРОВ
Original assignee: Сергей Александрович ВЕРЕТЕННИКОВ
Priority date: 2019-08-23
Filing date: 2020-08-05
Publication date: 2021-03-04
Also published as: RU2715815C1

Abstract

The invention relates to the field of boat building, and more particularly to a design for foldable rigid inflatable boats (RIBs). The present foldable rigid inflatable boat comprises a hull, an inflatable tube, and a transom. The hull comprises two bow sections and two stern sections. The bow sections are connected to one another by their inner lateral edges along the keel line of the boat such that the inside surfaces of said sections can be folded together. The inner lateral edges of the bow sections are configured in the shape of convex curves. The stern sections are connected to one another by their inner lateral edges along the keel line of the boat such that the outer surfaces of said sections can be folded together. The bow sections are connected to the stern sections such that the inside surfaces of the bow and stern sections can be folded together about the point at which they are connected. The transom comprises two sections connected immovably relative to one another by means of a detachable connection. Each section of the transom is connected by its lower edge to a stern section such that it can be folded toward the inside surface of the corresponding stern section, and is further connected by its lateral outer edge to the stern end of the tube. The result is a reduction in the dimensions of the boat in a folded state, and an increase in the rigidity of the structure of the boat in a working state.

Description

Foldable rigid inflatable boat

Technology area

The invention relates to the field of shipbuilding, namely, to folding floating craft (ships), in particular, boats, and can be used in the development of designs for folding rigid inflatable boats, also called RIB boats (from the English Rigid Inflatable Boat).

Prior art

Rigid inflatable boat (RIB boat) is an inflatable boat with a rigid lower part of the hull and inflatable sides that provide shape and buoyancy when inflated (GOST R 53446-2009, GOST R 53447-2009, GOST R 53448-2009 - Inflatable boats. Part 1, 2, 3). The term “side of the vessel” (GOST 13641-80) is also used to designate the side surface of the vessel as a whole. RIB boat hulls are usually made of fiberglass or aluminum alloy. The RIB side of the boat is formed by an inflatable balloon made of a gas-tight material (for example, reinforced PVC). Vulcanization, gluing or ultrasonic welding is usually used to connect the inflatable balloon to the body. A motor is installed on the boat's transom, located between the aft ends of the inflatable balloon, which makes it possible to achieve high speeds - up to 100 km / h [website address: https: // www. shvartov.ru/blogs/ Articles / chto-takoe-lodki-rib].

RIB boats are mobile watercraft, characterized by a large carrying capacity and are widely used not only by rescue, patrol and other special services as high-speed transport vessels, but also by fans of water recreation as a tourist or pleasure boat, as well as for fishing, hunting, travel, etc. .P. In this regard, RIB boats of folding structures are in wide demand, providing the possibility of their compact storage and transportation, for example, to a resting place. However, it often happens that due to the large dimensions of the boat, even when folded, it is impossible to transport it in the trunk of a car, but can only be transported using a trailer, which complicates transportation. At the same time, a significant space is required for storing a boat (a separate room or part of a room), the allocation of which, especially in urban conditions, can be difficult.

Taking into account the above factors, an urgent task is to develop a design of a folding rigid inflatable boat, which makes it possible to minimize the dimensions of the boat in a folded state, which ensures the possibility of its fast and convenient transportation, as well as convenience and compactness of storage, while ensuring the rigidity and reliability of the hull and compliance of the boat design with the safety requirements of navigation [web page address: https://vodoley-market.ru/katalog/skladnye-lodki-rib/]. In addition, it should be noted that for production, one of the significant factors is to ensure the simplicity of the boat design.

Known technical solutions related to rigid structures of boats, made with the possibility of folding in half in the transverse direction, for example, according to patent N "RU 2267437 C2 [" Folding boats ", IPC В63В7 / 04, published date. 10.01.2006] or N ° RU2646206C2 ["Boat-box", IPC В63В7 / 00, published date. 03/01/2018]. Known designs contain the bow and stern sections, pivotally connected, and in the folded position, the bow section is laid on the stern for towing the boat by the drawbar attached to a sliding spar (as in patent N ° RU2267437C2), or in the folded position, the stern section enters the bow half its height, creating an overlap zone (as in patent N ° RU2646206C2). When folded in half, the boat is stored or transported using a trailer to the place of use. However, the known structures are characterized by high weight and large dimensions when folded, which makes it possible to ensure transportation only by means of a trailer.

Known designs of collapsible boats having a rigid structure of hull sections, interconnected by quick-release couplings, made with the possibility of stacking the sections one into another during storage or transportation and having watertight bulkheads, for example, along a. from. USSR N ° SU1177200A1 ["Collapsible boat", IPC В63В7 / 04, published date. 09/07/1985], patent N ° RU2099233C1 ["Collapsible boat Ruslan", MPK В63В7 / 04, published date. 12/20/1997], patent N ° RU78763U1 ["Collapsible boat", MPK В63В7 / 04, published date. 10.12.2008]. However, the known technical solutions do not provide for the implementation of inflatable structural elements, which causes a large weight of the product, and the non-folding sides with respect to the bottom cause the three-dimensional spatial configuration of the boat in the folded state with large dimensions. In addition, the known technical solutions are characterized by the complexity of the operations of assembling and disassembling boats.

Known design of a rigid folding boat according to patent N ° AU8135675B2 ["Rigid sectioned foldable boat", IPC B63B7 / 00, published date. application 25.11.1976], containing a set of rigid plates, interconnected along the lines of the hull bend in such a way that the boat can be folded along the hull in a flat shape. However, with regard to the known structure, it should be noted that when folded, it has large (extended) longitudinal dimensions, since transverse folding is not provided, and a large weight, since the inflatable elements of the boat structure are not provided. Known design of a folding boat according to patent application N "AU2018205133 А 1 [" Collapsible boat hull hinge arrangement ", IPC B63B3 / 12, published date. applications 07/26/2018], in which the bottom consists of two longitudinal hinged parts. The sides of the boat are connected to the bottom along it by means of hinged joints. The hinge joints are protected against water penetration. The boat folds longitudinally, but has no transverse folds. The material can be glass fiber or polymer, such as PVC, which reduces the weight of the product. However, folding the boat only in the longitudinal direction causes a large length of the boat when folded for transportation and storage, and the absence of an inflatable balloon forming the side negatively affects the safety parameters (buoyancy margin) of the boat.

Known design of a folding inflatable motor boat with a rigid bottom hull according to patent N ° RU2599107C2 ["Foldable RIB class boat with an inflatable bottom", IPC В63В7 / 08, B63B3 / 08, published date. 10.10.2016], which consists of an inflatable rigid bottom body, a flat inflatable rigid floorboard, a transom and an inflatable side balloon. The bottom hull and bottom of the boat are made of Double-Wall fabric. The inflatable floor liner and transom are glued in with flexible elastic joints. Due to the implementation of all elements inflatable, the weight of the boat is reduced. Transportation is carried out in a deflated state, which ensures a reduction in transportation dimensions. The working pressure of the bottom of the boat and the floorboard is slightly higher than the working pressure of the onboard cylinder. However, the implementation of all elements inflatable, including the bottom and bottom, significantly reduces the reliability of the vessel due to possible mechanical damage to the inflatable bottom, which is under high working pressure, which leads to a loss of bottom rigidity and, as a consequence, a loss of rigidity of the boat as a whole, which entails a loss driving performance (in particular, handling) of the boat. Known "Folding motor-rowing boat" by patent N ° RU116121U1 [IPC В63В7 / 00, published date. 05/20/2012], which contains a skeleton placed inside a shell. The boat has a soft shell, for example, of a multilayer PVC fabric, and a collapsible transformable frame formed by longitudinal and transverse frames, hingedly connected to each other. The frame, moving apart inside the shell, pulls it with the necessary force and provides the boat with sufficient rigidity. After sliding, the frame is fixed with a locking mechanism. A removable transom is used to mount the motor, which gives the structure additional strength. However, it should be noted that although the boat is folded in a flat package and can be transported on the roof of a car, the longitudinal frame members have a significant lengthy dimension. At the same time, the soft shell of the boat bottom has a high probability of mechanical damage (for example, on the bottom of a reservoir at a shallow depth in the coastal zone), which significantly reduces the reliability of the vessel.

Transverse folding seems to be more preferable from the point of view of increasing the compactness of the floating craft in folded form (that is, reducing its transport dimensions) compared to longitudinal folding, since the longitudinal dimension of the floating craft exceeds its transverse dimension.

So, for example, the known design of a folding inflatable boat according to patent N ° RU2385251C1 ["Folding inflatable boat with a hard bottom (transformer)", IPC В63В7 / 08, published date. 03/27/2010], containing a closed-loop inflatable balloon, an elastic bottom and a hollow box-shaped seat inside. The boat additionally contains a rigid bottom made of plastic and consisting of a stern and bow half. To move the boat, its sides are deflated and the structure is folded in half with the placement of elastic elements inside. When folded transversely, the boat forms a box-like structure (case). Also known as foldable inflatable boat with a rigid bottom [patent N ° US4597355A "Folding semi-rigid inflatable boat", IPC B63B7 / 08, published date. application 07/01/1986], which has a rigid hull with a rigid bow and rigid aft halves, connected by a transverse hinge. The board is equipped with an upper inflatable part. The boat is folded with the upper side part deflated, in the lateral direction in half. It should be noted that in patents N ° N ° RU2385251C1 and US4597355A, the transverse folding of the boat in half into a box-like structure (case) causes significant volumetric dimensions in the folded state, while in the known structures additional longitudinal folding is not provided.

Known "Inflatable motor boat" [patent N ° RU90039U1, IPC В63В7 / 08, published date. 10/27/2009], containing a U-shaped inflatable balloon and a soft PVC bottom. The boat is equipped with a rigid sectional keel pad made of composite material or aluminum alloy. Adjacent sections of the keel pad in the operating condition of the boat are fastened together, for example, using a bolt tie. The width of the keel pad sections corresponds to the distance between the opposite parts of the U-shaped inflatable balloon in the place of its installation. Each section of the keel pad is glued to the bottom of the cylinder so that the length of the gluing along the axis of the boat is less than the length of the section. When the boat is folded, air is released from the cylinder, the bolt ties are removed, and then the boat is folded together with the keel pad sections with the deflated cylinder inward, bending at the joints of the sections, getting a folded box structure. As the disadvantages of the known solution, it should be noted the low longitudinal rigidity of the boat hull due to the implementation of the keel lining from several sections connected by ties, as well as the volumetric spatial configuration of the boat in the folded state. In addition, the bottom of the boat is flat and does not provide proper seaworthiness. Known "Rigid-inflatable folding motor boat RIB" [patent N ° RU121226U1, IPC В63В7 / 08, published date. 20.10.2012], containing a rigid body of several sections and a U-shaped inflatable balloon glued to them. The sections of the rigid body are interconnected by strips of elastic waterproof material (for example, PVC) and tightening devices equipped with dampers designed to relieve loads on the docking unit between the sections. Sections of the rigid hull of the boat are equipped with locking protrusions that prevent vertical displacement of the sections. The fastening strip between the sections is made in such a way that, when the clamping device is removed, it allows the sections of the rigid boat hull together with the deflated freeboard balloon to fold relative to each other in one direction. However, the folded structure has a three-dimensional box-like shape formed by rigid sections of the body, and this solution does not provide for the possibility of additional longitudinal folding, which does not optimally reduce the transport dimensions.

As a technical solution (prototype), the closest to the claimed invention in terms of a set of essential features, a folding rigid inflatable boat is proposed, known from the patent J "55728 W [" Foldable inflatable boat with a hard bottom ", IPC В63В7 / 08, published date. 27.08.2007], relating to boats of the RIB class and containing a rigid bottom (hull), made sectional, and an inflatable side balloon connected to it. RIB boats are characterized by high speed parameters, while a transom located between the aft ends of the inflatable balloon serves for the installation of the motor. The bottom (body) consists of 2 or more sections. The walls of the contacting sections are made with protrusions and grooves with the ability to enter the protrusions into the corresponding grooves to increase the rigidity of the structure. In the assembled state, the bottom sections are tightly adjacent to each other along the joint plane and form a body (bottom) of the boat. The joints of the adjoining sections are made flexible by gluing to them an elastic waterproof tape consisting of two layers of reinforced PVC or other elastic material. The tape acts as a connecting, sealing element, and also gives additional rigidity to the structure. The inflatable side balloon is hermetically glued to the rigid body. The cylinder is made of PVC material "Unisol". The rigid bottom, which forms the body, is made of fiberglass. To ensure the rigidity of the structure along the keel line, a cable is attached along the bottom side of the hull, which is pulled into a recess made in the bottom along the entire length along the keel line. The cable is pulled in the assembled state of the boat and retracted in the transportable state.

When the boat is folded after the air is released from the side cylinder, the abutting edges of the bottom sections diverge to the width of the outer section of the sealing tape, providing a place for placing the deflated side cylinder, and the boat is folded in the transverse direction into a three-dimensional box-shaped spatial structure.

However, the known technical solution, providing the possibility of folding the boat in the transverse direction, does not provide for the constructive possibility of additional folding of the boat's hull in the longitudinal direction, and the implementation of this possibility would significantly reduce the dimensions of the boat in the folded state intended for its transportation and / or storage. In addition, the known technical solution does not consider the implementation of the connection of the transom with the aft section of the hull (bottom) with the possibility of folding the transom inside the boat at the connection point, which could also reduce the dimensions of the boat in the folded state. It should also be noted that the longitudinal rigidity of the boat under the action on the hull of loads directed vertically from top to bottom is provided only due to additional a structural element - a cable stretched under the bottom of the boat and providing a tie (force closure) of the hull sections. In the event of possible mechanical damage to the cable, an almost complete loss of the longitudinal rigidity of the boat structure will occur, which will lead to a loss of seaworthiness and an emergency, since without the presence of a cable, the boat structure does not have sufficient rigidity.

The technical result, which the claimed invention is aimed at, is to reduce the dimensions of a folding rigid inflatable boat in a folded state (for transportation and / or storage) while increasing the rigidity of the boat structure in its working condition (that is, in an unfolded state, with an inflated balloon and fixed transom).

It is proposed to reduce the dimensions of the boat in the folded state by realizing the possibility of folding the floating craft both in the transverse and longitudinal directions.

In this regard, it seems appropriate to note the well-known technical solution related to the design of the end of a folding boat [patent N ° RU2029706C1 "End of a folding boat", IPC В63В7 / 02, published date. 02/27/1995]. The end is made of triangular and quadrangular sheet elements, interconnected by flexible sealed hinges, and can be folded (in the transverse and longitudinal direction) into a compact package. Four sections of the side sheathing are triangular in shape, and two sections are quadrangular and located symmetrically relative to the diametrical plane (and hence the keel line), and the bottom sheathing sections are quadrangular in shape, with all the sections being interconnected along rectilinear edges. However, it should be noted that the connection in the known technical solution of the shell sheathing sheets along the straight edges necessitates the use of additional structural elements to ensure rigidity (frames, cans, floorboards), which, in turn, complicates the design.

Disclosure of invention

To achieve the above technical result, a folding rigid inflatable boat is proposed, which contains a hull, an inflatable balloon forming a side, and a transom. The inflatable balloon is connected to the body. The transom is installed between the aft ends of the inflatable balloon. The hull contains two bow sections and two aft sections. The bow sections of the hull are interconnected by their inner side edges along the keel line of the boat with the possibility of folding the bow sections at the point of their connection to each other towards each other with their inner surfaces (i.e., inside the boat). The inner side edges of the nose sections are made in the form of convex curves. The stern sections of the hull are interconnected by their inner side edges along the keel line of the boat with the possibility of folding the stern sections at the point of their connection to each other towards each other with their outer surfaces (i.e. outside the boat). The bow hull sections are connected to the corresponding aft hull sections with the possibility of folding the aft hull sections connected to each other, with the bow hull sections connected to each other, towards each other with their inner surfaces (i.e., inside the boat) at the junction of the bow sections with the stern sections. The transom contains two sections, fixedly connected relative to each other by means of a detachable connection. Each section of the transom is connected with its lower edge to the corresponding aft section of the hull with the possibility of folding each section of the transom to the inner surface of the corresponding aft section of the hull (that is, inside the boat) at the place of their connection, and with the lateral the outer edge of each transom section is connected to the corresponding aft end of the balloon.

Signs of the proposed technical solution, distinguishing from the prototype, are the following: the implementation of two bow sections of the hull as described above - interconnected along the keel line of the boat by their inner side edges, which are convex curves, with the possibility of folding the bow sections at the place of their connection towards each other with their inner surfaces; making two aft hull sections as described above - interconnected along the keel line of the boat with their inner side edges with the possibility of folding the aft sections at the place of their connection towards each other with their outer surfaces; making the transom containing two sections, which are fixedly connected relative to each other by means of a detachable connection, while each of the transom sections is connected with the lateral outer edge to the corresponding aft end of the cylinder, and the lower edge is connected to the corresponding aft section of the hull with the possibility of folding inside the boat (i.e. is to the inner surface of the corresponding aft section) at the junction with the aft section.

The proposed design of the hull and transom sections as described above makes it possible to fold the boat (with a deflated inflatable balloon forming the side and disconnected transom sections), first in the transverse, then in the longitudinal direction, which makes it possible, in comparison with the prototype, to reduce the dimensions of the boat when folded condition and provide the possibility of more compact storage and / or transportation. The boat is folded in the following order. First, the deflated balloon is laid and straightened, after which the boat is transversely folded: the transom sections are laid on the aft sections (inside the boat), then fold the stern sections (with the transom sections laid on them) onto the bow sections inside the boat. Then, the sections are longitudinally folded along the keel line towards each other inside the boat so that the bow sections are located outside the aft sections and cover them. When folded, the boat is a so-called package. In this case, the implementation of the bow sections of the hull connected to each other along the inner lateral curvilinear (convex) edges along the keel line determines the stress state of the hull, which ensures the rigidity of the boat structure in its working condition, that is, when the boat is unfolded, the balloon forming the side is inflated, and the transom is installed between the aft ends of the cylinder. The stressed state of the boat hull provides, in comparison with the prototype, a higher structural rigidity. Also, as an advantage of the proposed technical solution, it should be noted that due to the connection of the bow sections of the hull to each other along the convex curved edges as described above, the design of the boat does not require the use of additional structural elements to ensure rigidity (frames, cans, floorboards), which is confirmed the results of the research and testing of prototypes carried out by the authors.

In order to further increase the rigidity of the boat structure in working condition, the bow hull sections can be connected with the corresponding aft hull sections with an overlap in such a way that the aft sections are located over the corresponding bow sections. With this design, it is possible to support the peripheral section, located along the leading edge of each aft section, on the peripheral section of the corresponding bow section, while the platforms of the bow sections, on which the edges of the aft sections are located, can be made lowered (in the form of a step). The leading edge of each aft section of the hull can be beveled towards the lateral outer edge of this section, which makes it possible to more densely (in terms of the package thickness) longitudinal folding of the boat sections in order to further reduce the dimensions of the boat in the folded state (decrease in the package thickness). The implementation of the aft sections with beveled leading edges provides a backlash between the bow and aft sections when folding. When longitudinally folding the bow sections of the boat towards each other with the stern sections already laid on them (as a result of the transverse folding performed before this), the backlash allows the trailing edges of the stern sections to be raised (that is, to make the stern sections a limited angular turn), as a result of which a more dense folding is ensured package.

In addition, to provide the possibility of a more dense folding of the boat sections, which makes it possible to further reduce the dimensions in the folded state, namely, when laying the longitudinally folded aft sections into the space (gap) between the longitudinally folded bow sections, by reducing the thickness in the area in which they are connected together the bow and stern sections, each stern section of the hull can be made with a cut of its corner section between the leading edge and the inner side edge.

To ensure a more rigid connection of the transom sections with the aft hull sections, each transom section connected to the corresponding aft hull section with its lower edge can be installed on the upper surface of the specified aft hull section.

To prevent the penetration of water through the joints of the interconnected elements of the boat (i.e. to ensure the required degree of tightness of the joints), the connection of each transom section with the corresponding aft hull section can be made with using an elastic waterproof material glued at the junction on each side of the transom (that is, on the outside and inside of the junction). The adhesive connection is a permanent connection, which ensures the integrity of the boat structure, and the use of adhesive tapes of elastic waterproof material is the simplest and most reliable solution.

To ensure the connection of the transom to the inflatable bladder forming the bead, the lateral outer edge of each transom section can be connected to the corresponding aft end of the bladder by means of an adhesive connection, which, as noted above, is the simplest and most reliable design.

Structurally, a simple and reliable implementation of the connection of the transom sections to each other is, for example, an implementation in which both transom sections are connected to each other by means of a removable bracket having a U-shaped cross-section, installed on the transom section from above and covering sections of the outer and inner surfaces of each section transom, with the bracket secured to the transom sections by means of threaded connectors.

In order to ensure better tightness of the joints of the boat elements and prevent water from entering through possible gaps at the junction of the transom sections with each other, the transom can be equipped with an element (usually called an "apron") made of elastic waterproof material and glued along the inner surface of each transom section along its the inner side edge, as well as along the section of the inner surface of the aft sections, adjacent to the junction of the transom sections, while the width of the specified element makes it possible to fold the transom sections into the boat.

In order to provide a larger volume of the inner space of the bow of the boat (by increasing the width of the bow of the hull boats), which can be considered a relevant factor for watercraft intended for recreation on water, an additional hull section can be connected to each bow section of the hull, which is located along the outer side edge of the bow section and connected to the specified outer edge.

To prevent the penetration of water through the joints of the interconnected sections of the boat's hull (i.e. to ensure the required degree of tightness of these joints), all joints of the hull sections can be made with the help of an elastic waterproof material glued to the surfaces of the sections to be connected as from the inner, and from the outside of the boat. As noted earlier, such a connection is the simplest and most reliable design solution, and the adhesive connection, which is one-piece, ensures the integrity of the boat structure.

In order to improve manufacturability and simplify the manufacture of a folding boat, the boat hull sections can be made of sheet material.

The inflatable balloon that forms the side of the boat can be connected to the hull by means of an adhesive connection, which, as already noted above, is the simplest and most reliable implementation. At the same time, in order to increase the rigidity and reliability of the boat structure in working order and to increase the degree of protection against water penetration through the junction, the adhesive connection of the cylinder with the body is made along the entire line of contact of the container with the body.

Usually, when developing designs for RIB class boats in order to reduce water resistance when the vessel is moving (to achieve a higher speed), they provide the shape of the hull (bottom), which allows minimizing hydrodynamic resistance when the boat is moving, which causes the hull to be made without protruding parts (which increase frontal hydrodynamic resistance), with streamlined contours. Therefore, when making the bow of the hull, consisting of two sections connected to each other along the keel line of the boat by the inner side edges, the optimal performance will be in which the distance between the line of connection of the inner side edges of the bow sections and the main line of the boat decreases or remains constant in the direction from the bow to aft along the entire length of the specified line of connection of the bow sections.

Brief description of the drawings The graphic materials contain an example of a specific implementation of a folding rigid inflatable boat (schematic images).

FIG. 1 shows a schematic representation of the boat in working order (the boat is unfolded, the balloon is inflated), top view.

FIG. 2 shows a schematic view of the boat's hull (without an inflatable balloon), top view, showing the edges of the hull and transom sections.

FIG. 3 shows a diagram of the sweep (cutting) of the hull and transom sections of the boat.

FIG. 4 shows a schematic side view of the boat (without an inflatable balloon). FIG. 5 schematically shows a section along the plane A-A of FIG. 2.

FIG. 6 schematically shows a section along the plane b-b of fig. 2.

FIG. 7, 8, 9 schematically show the stages of folding the boat when the balloon is deflated (the balloon is not shown), the dashed arrows show the direction of laying the sections: in Fig. 7 - transverse folding of the transom sections onto the aft sections of the hull, FIG. 8 is a transverse folding of the aft hull sections onto the bow hull sections, FIG. 9 - longitudinal folding of the bow and stern sections into a package.

Best Mode for Carrying Out the Invention Foldable rigid inflatable boat contains a rigid body 1, an inflatable balloon 2 forming the side of the boat, and a transom 3 (Fig. 1).

In the exemplary embodiment shown, the body 1 is formed by two bow sections - left 4 and right 5, two aft sections - left 6 and right 7, as well as two additional bow sections - left 8 and right 9 (Figs. 1, 2).

Section 8 along the entire length of its inner edge 10 is connected to the outer edge 11 of section 4, and section 9 is connected along the entire length of its inner edge 12 to the outer edge 13 of section 5 (Fig. 2). It should be noted that the position and sides (left, right) are usually determined relative to the direction of sight from the stern to the bow.

Sections 4 and 5 are interconnected along the keel line L-L of the boat along their inner side edges, respectively, 14 and 15. Edges 14 and 15 are symmetrical about the keel line, and each of them is a convex curve (Fig. 3). A convex curve is understood as a curve that lies on one side of any tangent line [Internet page: https://m.wikipedia.org/wiki/BbinyKHaa_KpHBaa].

The geometry (curvature) of the convex edges 14 and 15 is determined experimentally so that when they are connected to each other, the required geometry of the bow of the boat (stem) and hull contours are provided. Such an embodiment provides the possibility of folding the boat (in a package) for transportation and / or storage, and the connection of the bow sections along the curved edges ensures the stressed state of the hull, thereby ensuring the rigidity of the boat hull in working condition (that is, in the unfolded state, with the balloon inflated and fixed transom).

According to the accepted definitions, the keel line is the line of intersection of the bottom part of the theoretical surface of the hull with the diametrical plane; the main line is the line of intersection main and diametrical planes; the diametrical plane is the vertical plane that runs along the ship's hull and divides its theoretical surface into two symmetrical parts; the main plane is the horizontal plane passing through the lower point of the hull keel line [web page: https: //flot.eom/publications/books/shelf/chamikov/6.htm].

The edges 14, 15 can be made in the form of strictly convex curves (that is, without straight line segments). Also, the edges 14, 15 can be made as shown in FIG. 3, when each of the edges 14, 15 includes a strictly convex section (respectively 14.1 and 15.1) and a straight section (respectively 14.2 and 15.2). The connection between the curved sections 14.1 and 15.1 of the edges 14 and 15 forms a curved section f of the keel line (Fig. 4) and provides the stressed state of the bow sections of the hull (necessary for the rigidity of the boat structure), and the straight line segment obtained by connecting sections 14.2 and 15.2 provides with longitudinal folding of the bow sections of the boat towards each other with the aft sections laid on them, the possibility of forming a package that is more compact in height. In the example shown, the distance from the connection line of the curved sections 14.1 and 15.1 of the edges 14 and 15 (Fig. 4, section f) to the main line of the boat OL (Fig. 4) decreases in the direction from bow to stern along the entire length of section f, and the distance between the main line of the OL of the boat and the line of connection of the straight sections 14.2 and 15.2 of the edges 14 and 15 remains constant. Thus, the distance between the line of connection of the inner side edges of the bow sections and the main line of the boat decreases or remains constant in the direction from bow to stern along the entire length of the specified line of connection of the bow sections.

As shown in the cutting diagram of the boat sections (Fig. 3), the edges 10, 12 of the additional sections 8, 9 and the corresponding edges 11, 13 of the bow sections 4, 5 are made in the form of concave curves, which makes it possible to form a convex shape of the bow end of the boat when connecting the sections along the indicated edges, and also ensures the rigidity of the hull (bow) as a result of creating a stressed state of the hull elements connected along the curved edges. The use of additional sections 8 and 9 makes it possible to increase the width of the bow of the boat's hull, which is important for watercraft intended for recreation on the water (pleasure, tourist, etc.), while further increasing the rigidity of the bow of the boat.

The aft sections 6 and 7 are interconnected along the keel line L-L of the boat along their inner side edges, 16 and 17, respectively, which are made straight.

The stern sections 6 and 7 with their leading edges 18 and 19 are connected to the bow sections 4 and 5 along their trailing edges, respectively, 20 and 21. In the presented example of execution, the connection of the bow and stern sections is made with an overlap: the stern sections 6 and 7 are located on top of their respective nose sections 4 and 5 (Fig. 5). In particular, at the junction of the bow and stern sections, the left 4 and right 5 bow sections have support platforms (sections) 22 and 23. In the unfolded state of the boat, the stern sections 6 and 7 rest on these sections with their sections along the leading edges 18 and 19, which provides an additional increase in the rigidity of the boat structure in working order.

The left 6 and right 7 stern sections are connected by their trailing edges 24 and 25 with the corresponding left 26 and right 27 sections of the transom 3 along the lower edges (edges) 28 and 29 of the indicated sections 26 and 27 of the transom, while in the operating condition of the boat, each of the sections of the transom its lower edge is installed on the upper surface of the corresponding aft section of the hull, which provides an additional increase in the rigidity of the connection (Fig. 6). Sections 6 and 7 are made with cuts 32 and 33 from the side of the front part of the edges 16 and 17 (Figs. 2, 3), which, when the boat is folded, makes it possible to closer converge the bow sections folded longitudinally (along the keel line), covering the folded longitudinally aft sections (after the transverse folding of the stern sections 6 and 7 with bow 4 and 5) in the area where the bow and stern sections are connected together, which, in turn, makes it possible to fold the boat sections more tightly into a package. In the example shown, the sections 32 and 33 are made in the form of straight line segments, since this design is the simplest and most technologically advanced.

The leading edges 18 and 19 of sections 6 and 7 are beveled (directly from the points of their connection with the cuts 32 and 33) towards the corresponding outer side edges 34 (section 6) and 35 (section 7), which also makes it possible to reduce the thickness of the package in the longitudinal folding the boat sections. The edges 18 and 19 are straight, with each of the edges 18, 19 located at an angle a (Figs. 2, 3) to the corresponding trailing edge 20, 21 of the nose section (that is, to the transverse vertical plane). This design makes it possible to raise the trailing edges of the aft sections during longitudinal folding of the hull sections by making an angular rotation of the aft sections in the diametral plane of the boat within the specified angle, which makes it possible to more densely (in terms of the package thickness) longitudinal folding of the boat sections. The value of the angle a is selected empirically so as to minimize the dimensions of the boat in the folded state in terms of the height and thickness of the package. Based on the results of testing prototypes, it is recommended to choose an angle a equal to (5 t-10) °.

The inflatable balloon 2, forming the side of the boat, is connected to the hull 1 formed by the sections 4 to 9 by gluing the balloon to the upper edge of the hull along the entire line of contact of the balloon with the hull (that is, along the entire length of the upper edge of the hull). The transom 3 is installed between the aft ends 37 and 38 of the balloon 2 (Figs. 1, 2): the lateral edge 39 of the transom section 26 is glued to the aft end 37 of the balloon 2, the lateral edge 40 of the transom section 27 is glued to the aft end 38 of the balloon 2. Sections 26 and 27 transoms 3 are fixedly interconnected. In the example shown, the sections 26 and 27 of the transom 3 are interconnected by means of a detachable connection - a collar removable bracket 41 (Fig. 1), which has a U-shaped cross-section, is installed on the sections 26, 27 from above and covers sections of the outer and inner surfaces each transom section. The brace 41 is fixed on the transom sections 26, 27 by means of threaded connectors (not shown in the figure), thereby ensuring the stationary position of the sections 26 and 27 relative to each other, while the inner side edges 43 and 44 of the transom sections 26 and 27 are in contact with each other. friend. Other constructive solutions are also possible for rigidly fixing the position of the transom sections relative to each other, for example, using a motor that can be rigidly fixed simultaneously on both sections 26 and 27.

Thus, the balloon 2 and the transom 3 fixed between its aft ends 37, 38 form a closed loop along the perimeter of the boat hull, which (along with the connection of the bow hull sections along curved convex edges) is necessary to ensure the rigidity of the boat structure.

To prevent water from entering the boat through the gap between the edges 43 and 44, a protective element is glued on the inner surfaces of the transom sections - an apron 45, made of elastic waterproof material and overlapping on all sides (along the entire perimeter) the area around the edges 43 and 44. The width of the apron is selected sufficient for free laying of the transom sections on the aft sections of the hull when the boat is folded, i.e. the slack in the apron allows the top corners of the transom sections to open when folded. The joints of the hull sections with each other and with the transom sections are made flexible by gluing the joints with an elastic waterproof reinforced material S both from the inside of the boat and from the outside of the boat (Figs. 2, 5, 6). Also, using an elastic waterproof material, the balloon is connected (glued) to the body and to the transom sections. As a connecting material, for example, a tape of reinforced PVC can be used, usually used for connecting (gluing) individual parts of boats of the RIB class and glued to the parts to be joined, for example, with Bostik Vinicol 1520 glue. The properties of the material of the tapes and the characteristics of the glue ensure the required degree of waterproofing, strength and other characteristics of the joints, corresponding to the requirements for ships of this class, as well as the flexibility of the joints when folding the boat. The width of the tapes S is selected such as to exclude the presence of open (not glued) gaps between the edges of the joined structural elements.

The connection of the aft sections 6 and 7 of the hull 1 with the sections 26 and 27 of the transom 3 is made using tapes S (Figs. 2, 6) in such a way that when the balloon 2 is deflated and the transom sections 26 and 27 are separated from each other when the cap 41 is removed, the possibility of folding (at the junction of the edges 24 and 25 with the corresponding edges 28 and 29) of the transom sections to the aft sections connected to them. The connection of the aft sections 6 and 7 with the bow sections 4 and 5 is made using tapes S (Figs. 2, 5) in such a way that it is possible to fold (at the junction of the edges 18 and 19 with the corresponding edges 20 and 21) of the aft sections onto the bow inside the boat. In this case, the aft sections 6 and 7 are interconnected so that they can be folded at the junction of the edges 16 and 17 (along the keel line) to the outside of the boat, i.e. towards each other with their outer surfaces (from the bottom hull), and the bow sections 4 and 5 are interconnected so that they can be folded at the junction of the edges 14 and 15 (along the keel line) inside the boat (in Fig. 2 tape S in the places where sections 4, 6 are glued with sections 5 , 7 is not separately indicated). Additional sections 8 and 9 are connected along the corresponding edges with sections 4 and 5 also by gluing the connection points with tapes made of elastic waterproof reinforced material (in Fig. 2, the tape S at the points of gluing of sections 8, 9 with sections 4, 5 is not separately indicated), moreover, when the boat is folded, the additional sections 8, 9 are folded outward of the boat to the bow sections 4 and 5, respectively.

For the manufacture of sections of the hull of the boat, sheet material is used. This can be, for example, an aluminum alloy. However, for hulls of boats of the RIB class, it is more preferable to use sheets of fiberglass or ABS plastic, which has the necessary strength characteristics, as well as elasticity, which is required to perform the connection of the bow sections along curved edges.

The transom sections 26, 27 can be made from the same materials as the body, or, for example, from moisture resistant plywood.

The cylinder 2 is made of a water-gas-tight elastic material, for example, reinforced PVC, etc. An inflatable balloon is usually made of several compartments (for example, four), which is aimed at increasing the survivability of the vessel. The working pressure of the gas in the cylinder is usually 0.25 atm.

The boat is a one-piece non-collapsible folding structure, the rigidity of which in working condition is ensured by a combination of the following factors: the stress state of the elastic sheets of bow sections 4 and 5, as well as 8 and 9 of hull 1 due to their connection to each other along curved edges (by gluing with tapes S made of elastic waterproof reinforced material), as described above, while the bow sections 4, 5 are connected by gluing tapes S with the aft sections 6, 7; the formation of a closed loop along the perimeter of the boat hull due to an inflatable balloon 2 glued to the upper part of the hull 1, between the aft ends of which a transom 3 is installed, and the fixedly connected sections 26 and 27 of the transom with their lateral edges 39 and 40 are inseparably connected (glued) to the aft the ends 37 and 38 of the inflatable balloon, and the lower edges 28 and 29 of the sections 26 and 27 of the transom are connected to the trailing edges 24 and 25 of the aft sections 6 and 7 of the hull.

The operation of the claimed folding rigid inflatable boat is as follows.

When folded, the boat is a package of compactly folded sections of the hull 1 and transom 3, as well as a deflated cylinder 2. The oars, seat and accessories can be packed in a separate bag.

From the folded state, the boat is first laid out along the longitudinal bend of the hull (along the keel line), along which the right and left sections are connected, then laid out along the transverse fold of the connection of the stern sections with the bow sections, then the transom sections are laid out and the inflatable balloon is extended, the inflatable balloon is inflated and the sections are connected transom between each other. Then the motor is attached to the transom, the seats and, if necessary, additional accessories are installed. Joining the elements of the boat by gluing with tapes made of elastic waterproof reinforced material excludes the ingress of water into the boat (seals the joints). The boat is unfolded, with an inflated balloon and an installed motor, ready for operation.

At the end of a boat trip, travel, fishing, etc. the boat needs to be folded compactly for transportation and / or storage. The boat is folded in the following order.

If a motor was attached to transom 3, remove it.

Then the balloon 2, which forms the side of the boat, is blown off, and the cap 41 is removed, separating the sections 26 and 27 of the transom 3, after which the joints of the boat elements can be folded at their joints.

Sections 26 and 27 of the transom are folded inside the boat on the aft sections 6 and 7 of the hull (Fig. 7). Folding of each section of the transom takes place at the place of its connection with the aft section, made with the help of elastic waterproof material. A deflated balloon 2 is placed on the inner surface of the body, and it is straightened.

Then the aft sections 6 and 7 with the transom sections 26 and 27 laid on them are folded onto the inner (deck) surface of the bow sections 4 and 5 (Fig. 8). Folding is carried out in the transverse direction at the junction of the aft sections 6, 7 with the bow sections 4, 5 (that is, at the junction of the edges 18, 19 with the edges 20, 21).

Then the boat, already folded in the transverse direction, is folded longitudinally along the keel line at the junction of the left and right hull sections (at the junction of the edge 14 with the edge 15 and the edge 16 with the edge 17) in such a way that the bow sections are located outside the aft sections and cover them, while the aft sections are folded towards each other with their outer (bottom) surfaces, and the bow sections are folded towards each other with their inner (deck) surfaces (Fig. 9).

Additional hull sections 8 and 9 fold outward of the boat to bow sections 4 and 5.

After folding the boat into a bag, it is packed in a cover, which is tightened with fastening straps. The boat is ready for transportation and subsequent storage.

Industrial applicability The proposed implementation of the bow and stern sections of the boat hull and their connection to each other allows for the folding of the boat sections in the transverse and longitudinal directions as described above, while making the transom of two sections and their connection with the aft hull sections provides the ability to fold the transom sections to the stern sections. sections (in order to make the package more compact while maintaining the integral structure of the boat). In addition, as noted earlier, making the leading edges 18 and 19 of the stern sections beveled towards the outer side edges 34 and 35 of the stern sections provides angular play and allows, during the folding process of the boat, to raise the trailing edges of the stern sections in the center plane of the boat within a double value the bevel angle a, which additionally provides the possibility of a denser (in the thickness of the package) longitudinal folding of the boat sections, and the execution of cuts 32 and 33 from the side of the front part of the side inner edges 16, 17 of the aft sections allow the folded aft sections to enter more freely between the folded bow sections on the area of connection of sections 4, 5, 6, 7 (i.e. helps to reduce jamming of the folded aft sections 6 and 7 in the interval between the folded bow sections 4 and 5), which means it contributes to an additional decrease in the thickness of the folded boat package.

At the same time, the rigidity of the boat structure in working condition is ensured by the stressed state of the sections of the bow of the hull due to their connection to each other along curved edges, as well as, along with this factor, the formation of a closed loop along the perimeter of the boat hull by an inflatable balloon glued to the upper part of the hull, forming a side , and a transom fixed between its aft ends, and the proposed technical solution does not require the use of additional structural elements (frames, cans, floorboards) to ensure the necessary rigidity of the structure. Thus, the inventive folding boat is a one-piece non-separable rigid inflatable floating craft that can be folded compactly for transportation and / or storage. At the same time, the proposed technical solution provides, in comparison with the prototype, the possibility of not only transverse, but also longitudinal folding of the elements of the boat, which significantly reduces the dimensions of the floating craft in the folded state, and also provides an increase in the rigidity of the boat structure in working condition due to the proposed connection of the bow sections along curved edges. In working order, the design of the boat provides the necessary characteristics of rigidity, strength, and buoyancy of the vessel. Were tested prototypes of folding rigid inflatable boats, manufactured according to the claimed technical solution, the results of which confirmed the compliance of the manufactured samples with the safety requirements established by the current regulatory documents for watercraft of this class: GOST R 53446-2009, GOST R 53447-2009, GOST R 53448-2009 - Inflatable boats. Part 1, 2, 3.

Claims

Claim

1. Foldable rigid inflatable boat, characterized in that it contains a hull, connected to the hull, an inflatable balloon forming a side, and a transom installed between the aft ends of the balloon; the hull contains two bow sections and two aft sections; the bow sections of the hull are interconnected by their inner side edges along the keel line of the boat with the possibility of folding the bow sections at the point of their connection to each other with their inner surfaces, while the inner side edges of the bow sections are made in the form of convex curves; the aft hull sections are interconnected by their inner side edges along the keel line of the boat with the possibility of folding the aft sections at the place of their connection to each other with their outer surfaces; the bow hull sections are connected to the aft hull sections with the possibility of folding the aft hull sections connected to each other, with the bow hull sections connected to each other, towards each other with their inner surfaces at the junction of the bow sections with the aft ones; the transom contains two sections, fixedly connected relative to each other by means of a detachable connection, and each transom section is connected with its lower edge to the corresponding aft section of the hull with the possibility of folding each section of the transom to the inner surface of the corresponding aft section of the hull at the place of their connection, and each transom section the transom section is connected to the corresponding aft end of the balloon.

2. Foldable rigid inflatable boat on and. 1, characterized in that the bow sections of the hull are connected with the corresponding aft sections of the hull with an overlap in such a way that the aft sections are located over the corresponding bow sections.

28

SUBSTITUTE SHEETS (RULE 26)

3. Foldable rigid inflatable boat according to claim 1, characterized in that the leading edge of each aft section of the hull is made beveled towards the lateral outer edge.

4. Foldable rigid inflatable boat according to claim 1, characterized in that each aft section of the hull is made with a cut of its corner section between the leading edge and the inner side edge.

5. Foldable rigid inflatable boat according to claim 1, characterized in that each of the two transom sections, connected to the corresponding aft hull section, is mounted with its lower edge on the upper surface of said aft hull section.

6. Foldable rigid inflatable boat according to claim 1, characterized in that the connection of each transom section with the corresponding aft hull section is made using an elastic waterproof material glued at the connection point on each side of the transom.

7. Foldable rigid inflatable boat according to claim 1, characterized in that the lateral outer edge of each transom section is connected to the corresponding aft end of the balloon by means of an adhesive connection.

8. Foldable rigid inflatable boat according to claim 1, characterized in that both sections of the transom are interconnected by means of a removable bracket having a U-shaped cross-section, installed on the section of the transom from above and covering the sections of the outer and inner surfaces of each section of the transom, while the bracket is secured to the transom sections by means of threaded connectors.

9. Foldable rigid inflatable boat according to claim 1, characterized in that the transom is equipped with an element made of elastic waterproof material and glued along the inner surface of each section of the transom along its inner side edge, as well as along the section of the inner surface of the aft sections adjacent to the place

29

SUBSTITUTE SHEETS (RULE 26) connections of transom sections, while the width of the specified element provides the ability to fold the transom sections.

10. Foldable rigid inflatable boat according to claim 1, characterized in that an additional hull section is connected to each bow section of the hull, which is located along the outer edge of the bow section and is connected to said outer edge.

11. Foldable rigid inflatable boat according to claim 1 or claim 10, characterized in that all connections of the hull sections to each other are made using an elastic waterproof material glued to the surfaces of the connected sections both from the inner and outer sides of the boat.

12. Foldable rigid inflatable boat according to claim 1 or claim 10, characterized in that the hull sections are made of sheet material.

13. Foldable rigid inflatable boat according to claim 1 or claim 10, characterized in that the balloon is connected to the hull by means of an adhesive connection.

14. Foldable rigid inflatable boat according to claim 13, characterized in that the balloon is connected to the hull by means of an adhesive joint along the entire contact line of the balloon with the hull.

15. Foldable rigid inflatable boat according to claim 1 or claim 10, characterized in that the distance between the line of connection of the inner side edges of the bow sections and the main line of the boat decreases or remains constant in the direction from bow to stern along the entire length of the specified connection line of the bow sections ...

thirty

SUBSTITUTE SHEETS (RULE 26)