JP6934694B1 - How to pull up cradle, boat dabit, rigid inflatable boat, and how to store rigid inflatable boat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cradle having excellent stability when raising and lowering a rigid inflatable boat, a boat dabit including the cradle, and a method of pulling up and storing a rigid inflatable boat using the boat dabit. SOLUTION: A cradle 7A used for a boat dabit, the cradle includes a main body portion and a cradle chock 72 attached to the main body portion and abutting on a composite boat, and the cradle chock is a fender of the composite boat. A cradle including a fender 721 formed with a recess for accommodating the material 102. [Selection diagram] Fig. 3

Description

The disclosure in this application relates to a cradle, a boat dabit, a method of pulling up a rigid inflatable boat, and a method of storing the rigid inflatable boat.

A boat equipped with a life-saving boat, a guard rescue boat, a guard boat, a submersible support boat, etc. installed on the deck of a ship (hereinafter, the mounted boat may be referred to as a "mounted boat". ) Is moved outboard, or the boat dabit is known as a device for collecting the onboard boat that has finished its work. 1 and 2 are diagrams for explaining an example of a conventionally known boat dabit (see Patent Document 1).

In the examples shown in FIGS. 1 and 2, the boat dabit A has a pair of boat support arms 2 provided apart from each other on the deck 1, and pulleys 3 for hanging the rope 4 are installed at the tips thereof. ing. As shown in the figure, the boat dabit A includes a cradle 7 provided on the ship side of the onboard boat 9, and rope attachment blocks 14 are provided at two locations at the upper end of the cradle 7 at approximately the same distance as the arm 2. The tip 6 of each rope is connected. Further, a series of rollers 8 are installed on both sides of the cradle 7, and these rollers 8 roll and move along the arm 2. Fixtures 16 to which ropes can be detachably attached were fixed at two places near the bow and stern of the onboard boat 9, and were stretched between the attachment block 14 at the upper end of the cradle 7 and the attachment 16 of the onboard boat 9. The onboard boat 9 is supported by a launching rope 15 of a predetermined length.

In the examples shown in FIGS. 1 and 2, the launching rope 15 is adjusted so that the side surface 17 of the mounted boat 9 comes into contact with the cradle 7 in order to prevent the side surface 17 of the mounted boat 9 from being damaged. Further, although not shown in FIGS. 1 and 2, a fender is provided on the side surface 17 or the cradle 7. As a fender provided on the cradle 7, a cradle chock in which a plurality of hollow rubber cushioning materials (D-shaped fenders) having a substantially D-shaped cross section are provided in parallel is known (see Patent Document 2).

In order to lower the mounted boat 9 using the boat dabits shown in FIGS. 1 and 2, the rope 4 may be unwound by the winch 5, and the rope 4 is lowered together with the cradle 7 of the mounted boat 9 as shown in FIG. The roller 8 rolls and moves along the arm 2, and when it exceeds the lower end of the arm 2, it descends while moving along the side surface of the hull. Then, when the water lands on the sea surface, the rope 4 becomes loose, and the rope 4 may be removed from the attachment 16 of the onboard boat 9.

Further, in order to pull up and store the mounted boat using the cradle shown in FIGS. 1 and 2, the lower end of the launching rope 15 attached to the rope mounting block 14 of the cradle is attached to the mounted boat, contrary to the descent. It may be fixed to the tool 16 and then the rope 4 may be wound up by the winch 5, whereby the onboard boat will first rise with the cradle 7 along the sides of the hull and then along the pair of arms 2. The cradle 7 is guided by those arms and placed in place. The raising and lowering of such a mounting boat 9 is made extremely smooth by the rollers 8.

In the invention described in Patent Document 1, since the onboard boat 9 is lowered along the pair of arms via the cradle, it is possible even during the operation of the ship. The operation does not require the outboard of the onboard boat 9 as in the conventional case, and can be performed extremely easily and quickly because the rope is simply drawn out. Further, structurally, an outboard swing mechanism is unnecessary, and the load is considerably distributed to the axial component of the arm, which is mechanically advantageous, and the mechanism can be simplified and made compact. Moreover, since the onboard boat 9 is raised and lowered along the arm and the hull together with the cradle, the safety is significantly improved as compared with the conventional suspension method.

By the way, in recent years, as the onboard boat 9, in addition to the conventional FRP boat, a compound boat has begun to be adopted. Rigid inflatable boats are based on inflatable boats (rubber boats), and the bottom is made of hard materials such as FRP, and the hull is a gliding boat type such as deep V type. As a result, the stability is secured by a large reserve buoyancy similar to that of an inflatable boat at low speeds, while the strength to withstand the wave impact at high speeds is also secured.

Rigid inflatable boats are lighter than boats made entirely of rigid materials, so they can exhibit high speeds, and rubber tubes that also serve as bulwarks also function as fenders. Therefore, the composite boat is useful for inspections and the like, and also functions as a fender against the cradle 7 while being held by the boat dabit. Therefore, when the boat dabit A described in Patent Document 1 is used for a rigid inflatable boat, it is not necessary to provide a fender on the cradle 7. More specifically, it is not necessary to fix the cradle chock provided with the fender as described in Patent Document 2 to the cradle 7 described in Patent Document 1, and a flat plate-shaped cradle chock can be used. (Hereinafter, a boat david using a flat plate cradle chock may be referred to as "boat dabit A'").

However, when the boat dabit A'is used for raising and lowering and storing the rigid boat, a force is always applied to the rigid boat in the direction of the cradle 7. Therefore, when the composite boat is stored for a long period of time, a new problem has arisen in which the side surface (rubber tube) of the composite boat in contact with the cradle 7 is dented and deformed.

In order to solve the above problem, by connecting the composite boat and the boat dabit A'with a support member, the horizontal position of the composite boat with respect to the boat dabit A'can be kept constant, and as a result, the boat dabit It is known that the side surface (rubber tube) of the composite boat stored in A'can be prevented from being pressed against the cradle more than necessary (see Patent Document 3).

Japanese Unexamined Patent Publication No. 2013-180731 Registered Utility Model No. 30777671 Japanese Unexamined Patent Publication No. 2019-182109

However, in the invention described in Patent Document 3, when the composite boat is pulled up or lowered (hereinafter, may be referred to as "lifting and lowering"), it is necessary to attach / detach the support member, which complicates the work. There is a problem. In order to solve this problem, the present inventors have produced a composite boat in which a part of the rubber tube (the portion in contact with the cradle) of the composite boat is reinforced with a reinforcing material.

When the composite boat manufactured using the boat dabit A'was stored for a long period of time, the problem that the side surface (rubber tube) of the composite boat was dented and deformed due to the reinforcing effect of the reinforcing material could be solved. However, the more the rubber tube was reinforced with a reinforcing material, the more the function as a fender was lost, in other words, the elastic deformability of the rubber tube became smaller. As a result, when the composite boat reinforced with the reinforcing material is lifted and lowered using the boat dabit A', the contact area of the rubber tube that contacts the flat plate cradle chock is reduced, so that the composite boat slips when ascending and descending. A new problem has arisen in which stability during ascent and descent is impaired.

The disclosure in this application was made in order to solve the above problem, and as a result of diligent research, a fender portion in which a recess for accommodating a rubber tube (fender material) of a rigid inflatable boat was formed in the cradle chock. It was newly found that the stability of the composite boat including the fender can be improved by providing the above, regardless of the presence or absence of reinforcement by the reinforcing material.

That is, the disclosure in the present application is to provide a cradle having excellent stability when raising and lowering a rigid inflatable boat, a boat dabit including the cradle, and a method of pulling up and storing a rigid inflatable boat using the boat dabit.

The disclosure in this application relates to a cradle, a boat dabit, a method of pulling up a rigid inflatable boat and a method of storing the rigid inflatable boat as shown below.

(1) A cradle used for a boat dabit, and the cradle is
With the main body
A cradle chock that is attached to the main body and comes into contact with the compound boat,
Including
The cradle chock includes a fender with a recess formed to accommodate the fender of the rigid inflatable boat.
Cradle.
(2) The fender is made of a solid elastic member.
The cradle according to (1) above.
(3) The cradle chock further includes a flat fender plate arranged adjacent to the fender.
The cradle according to (1) or (2) above.
(4) The cradle chock includes a first cradle chock and a second cradle chock that are arranged apart from each other.
The cradle according to any one of (1) to (3) above.
(5) The cradle according to any one of (1) to (4) above, and
A boat support arm with a pulley at the tip and separated from each other on the deck,
Wires that move through pulleys and
A winch for operating the wire and
Including boat dabit.
(6) This is a method of pulling up a compound boat using a boat dabit.
Boat David
With the cradle,
A boat support arm with a pulley at the tip and separated from each other on the deck,
Wires that move through pulleys and
A winch for operating the wire and
Including
The cradle is
With the main body
A cradle chock that is attached to the main body and comes into contact with the compound boat,
Including
The cradle chock includes a fender with a recess formed to accommodate the fender of the rigid inflatable boat.
How to pull up a compound boat
The process of bringing the fender of the composite boat into contact with the recess of the fender of the cradle chock,
The process of pulling up the composite boat with the fender of the composite boat and the recess of the fender of the cradle chock in contact with each other.
How to pull up a compound boat, including.
(7) The fender is formed of a solid elastic member.
The method for pulling up a compound boat according to (6) above.
(8) The fender of the composite boat includes a reinforcing part,
In the process of contacting, the reinforcing part is brought into contact with the recess of the fender of the cradle chock.
The method for pulling up a compound boat according to (6) or (7) above.
(9) The composite boat pulled up by the method of pulling up the composite boat according to any one of (6) to (8) above is brought into contact with the fender of the composite boat and the recess of the fender of the cradle chock. The process of storing in a state,
Storage methods for rigid inflatable boats, including.

By using the cradle disclosed in this application, the stability when raising and lowering the compound boat is improved.

FIG. 1 is a front view for explaining a conventional boat dabit. FIG. 2 is a side view for explaining a conventional boat dabit. FIG. 3 is a schematic side view showing the cradle 7A according to the embodiment and the state in which the cradle 7A and the composite boat 100 are in contact with each other. FIG. 4 is a front view showing an outline of the cradle 7A. FIG. 5 is a top view showing an outline of the composite boat 100. 6A to 6D are cross-sectional views taken along the line aa of FIG. 7A is a cross-sectional view taken along the line bb of FIG. 4, FIG. 7B is a cross-sectional view taken along the line cc of FIG. 4, and FIG. 7C is a cross-sectional view taken along the line dd of FIG. FIG. 7D is a cross-sectional view taken along the same direction as FIG. 7A.

Hereinafter, the cradle, the boat dabit, the method of pulling up the compound boat, and the method of storing the compound boat disclosed in this application will be described with reference to the drawings. In the present specification, members having the same type of function are designated by the same or similar reference numerals. For example, a member in which a and b are described after the same reference numeral 〇, for example, "... 〇a" and "... 〇b" mean members having the same function. Further, when describing a member having the same function, the description may be described as "... 〇" instead of the description of "... 〇a" and "... 〇b". Further, repetitive description of members with the same or similar reference numerals may be omitted. In addition, members having the same functions as those of the prior art are designated by the same or similar reference numerals as those of the prior art.

(Definition of direction)
As illustrated in FIGS. 3, 4 and 7, the direction of gravity is defined as the Z1 direction in the present specification. Further, the direction opposite to the Z1 direction is defined as the Z2 direction.

(Cradle Embodiment)
An embodiment of the cradle will be described with reference to FIGS. 3 to 7. FIG. 3 is a schematic side view showing the cradle 7A according to the embodiment and the state in which the cradle 7A and the compound boat 100 are in contact with each other. FIG. 4 is a front view showing an outline of the cradle 7A. FIG. 5 is a top view showing an outline of the composite boat 100. 6A to 6D are cross-sectional views taken along the line aa of FIG. 7A is a cross-sectional view taken along the line bb of FIG. 4, FIG. 7B is a cross-sectional view taken along the line cc of FIG. 4, and FIG. 7C is a cross-sectional view taken along the line dd of FIG. FIG. 7D is a cross-sectional view taken along the same direction as FIG. 7A.

The cradle 7A according to the embodiment includes at least a main body 71 (71a, 71b) and a cradle chock 72 (72a, 72b). The cradle 7A disclosed in this application is characterized by a cradle chock 72 portion. Therefore, the configuration of the cradle 7A other than the cradle chock 72 portion described later may be the same configuration as the known cradle as long as the effect disclosed in the present application is obtained, or any configuration may be added. Alternatively, any configuration may be deleted.

In the example shown in FIGS. 3 and 4, the main body portion 71 (71a, 71b) is a substantially U-shaped roller support portion 711 (711a, 711b), and is a shaft capable of rotating one or more arbitrary number of rollers 712. It supports. Further, in the examples shown in FIGS. 3 and 4, the cradle 7A has an arm portion 73 (73a, 73b) connected to the main body portion 71 (71a, 71b), and the main body portion 71 and the arm portion 73 have a substantially J shape. Is formed in. Further, in the example shown in FIG. 4, the pair of main body portions 71 (711a, 711b) of the cradle 7A are connected by the horizontal rack 74, and each of the pair of arms 73 (73a, 73b) has one end of the vertical rack 75. The other end of the vertical rack 75 is connected to the horizontal rack 74. With the above connecting structure, the cradle 7A has a substantially inverted torii-shaped integrated structure.

The outline of the rigid boat 100 will be described with reference to FIGS. 3, 5 and 6. The composite boat 100 includes a boat main body 101, a fender 102, and a reinforcing portion 103. The ship body 101 and the fender 102 may be the same as the known composite boat 100. Examples of the fender 102 include a rubber tube, a fiber-reinforced sheet that is flexible and can be deformed into a substantially cylindrical shape by blowing air, and the like. The fender 102 becomes hollow by blowing a gas such as air, and the fender function can be adjusted by adjusting the gas pressure. Further, the fender resin such as urethane foam resin may be filled in the fender 102 in a hollow state as long as the fender function is not impaired.

The reinforcing portion 103 may be formed on a part of the fender 102. Even if the reinforcing portion 103 is hardly elastically deformed (hereinafter, may be described as “elastically deformable”), the fender 102 in the portion where the reinforcing portion 103 is not formed can be elastically deformed. Therefore, even if a strong force is applied to the reinforcing portion 103 that comes into contact with the cradle chock 72 when the composite boat 100 is raised and lowered, the strong force can be dispersed throughout the fender 102. Further, when the composite boat 100 is stored for a long period of time, the reinforcing portion 103 that comes into contact with the cradle chock 72 cannot be elastically deformed. Therefore, it is possible to prevent the fender 102 at the portion that comes into contact with the cradle chock 72 from being deformed.

The fender 102 of the composite boat 100 has (1) a shock absorbing function when the composite boat 100 collides with a ship or the like equipped with a cradle 7A or a boat David, and (2) when the sea wreck is lifted from the sea. (A function to prevent a fall when pulling up a marine victim by deforming the fender 102 due to the weight of the marine victim). Therefore, the reinforcing portion 103 may be formed on a part of the fender 102, more specifically, at least a portion abutting on the cradle chock 72. The portion forming the reinforcing portion 103 may be appropriately determined depending on the shape of the composite boat 100. FIG. 5 shows an example in which two reinforcing portions 103 are formed on each side of the contact region (reference numeral L1 in FIG. 5) corresponding to the length of the horizontal frame 74 of the cradle 7A of the fender 102 of the composite boat 100. It is shown. Alternatively, as shown in FIG. 5, if the bow side region L2 of the fender 102 (the region that is tapered toward the bow side and does not contact the cradle chock 72) is sufficiently long, it will contact. The reinforcing portion 103 may be formed in the entire area of the region L1.

The reinforcing portion 103 is not particularly limited as long as it can prevent the fender 102 from being deformed when the composite boat 100 is stored for a long period of time. FIG. 6A shows an example in which, for example, a ring-shaped non-deformable reinforcing member 103a is embedded inside a rubber or fiber reinforced sheet or the like forming a fender 102. The reinforcing member 103a is not particularly limited as long as the contact portion with the cradle chock 72 is not deformed, and may be formed of, for example, a metal, a rigid resin, a fiber reinforced resin, or the like. Further, by embedding (weaving) the reinforcing fibers in the fender 102, the reinforcing fibers and the materials constituting the fender 102 may jointly form the reinforcing portion 103. FIG. 6B shows an example in which the fender 102 is inserted into the ring-shaped non-deformable reinforcing member 103a and then gas is inserted into the fender 102 to form the reinforcing portion 103. The reinforcing member 103a may be a ring-opening ring as shown in FIG. 6C. FIG. 6D shows an example in which the reinforcing portion 103 is formed by arranging the reinforcing member 103a inside the fender 102. The reinforcing portion 103 shown in FIG. 6D can be formed by covering the reinforcing member 103a with a rubber or fiber reinforced sheet forming the fender 102 and adhering the ends of the rubber or fiber reinforced sheet to each other. In the example shown in FIG. 6D, the reinforcing member 103a has a substantially semicircular shape in cross-sectional view and is solid, but the shape and the like are not particularly limited as long as the deformation of the fender 102 can be prevented. For example, the reinforcing member 102 may have a substantially circular shape in cross-sectional view, or the inside of the reinforcing member 102 may have a hollow shape. Further, although not shown, the reinforcing member 103a may have a spiral shape.

Next, the cradle chock 72 will be described with reference to FIGS. 3, 4, and 7. The cradle chock 72 includes a fender 721 (721a, 721b) having a recess 7211 (7211a) for accommodating the fender 102 of the rigid inflatable boat 100. In FIG. 3 and the like, the cradle chock 72 includes a base plate 722 (722a, 722b) fixed to the horizontal rack 74 and the vertical rack 75, and the fender 721 is fixed to the base plate 722 using bolts 723 (723a). An example is shown. Alternatively, the fender 721 may be directly fixed to the horizontal frame 74 and the vertical frame 75 without including the base plate 722. Further, the fender 721 may be fixed to the base plate 722 by using an adhesive instead of using the bolt 723.

In the example shown in FIG. 7A, the shape of the recess 7211a in the cross-sectional view direction is substantially an inverted trapezoidal shape, but the shape of the recess 7211a is not particularly limited as long as the fender 102 can be accommodated. For example, the shape in the cross-sectional view direction shown in FIG. 7A may be a substantially inverted triangular shape, a semicircular shape, or the like. In other words, in the cross-sectional view direction shown in FIG. 7A, it suffices if there is a dent in the central portion of the fender 721.

The fender portion 721 is not particularly limited in material as long as it can accommodate the fender 102 of the composite boat 100. However, since the reinforcing portion 103 of the fender 102 cannot be elastically deformed, it is desirable that the reinforcing portion 103 is made of an elastic member such as rubber.

Further, in the example shown in FIG. 7A, the fender 721 is in a solid state, but may include a space inside as in the known D-type fender. When a space is included inside the fender 721, the shock absorbing function when the reinforcing portion 103 of the composite boat 100 collides with the cradle chock 72 is improved.

As described above, the reinforcing portion 103 can be formed on a part of the fender 102 of the composite boat 100, and in that case, the fender 102 can be elastically deformed when viewed as a whole, in other words, shock absorption. Has a function. Therefore, even when the fender 721 is formed in a solid state, a sufficient shock absorbing function can be obtained when the reinforcing portion 103 of the composite boat 100 collides with the cradle chock 72. Since the shape of the fender having a space inside changes as the material deteriorates, it is necessary to replace it at predetermined intervals. On the other hand, when the fender 721 is formed in a solid state, the shape is unlikely to change even if the material deteriorates. Therefore, when the fender 721 is formed in a solid state, the effect of reducing the frequency of replacement of the fender 721 can be obtained.

In the example shown in FIG. 4, the cradle chock 72 includes a first cradle chock 72a and a second cradle chock 72b that are arranged apart from each other. Alternatively, the cradle chock 72 may be formed by a single cradle chock 72 elongated in the horizontal direction 74 direction.

The following effects are obtained by raising and lowering the compound boat 100 and storing it for a long period of time using the cradle 7A according to the embodiment.
(1) The fender 721 of the cradle 7A includes a recess 7211 accommodating the fender 102 of the composite boat 100. Therefore, even when a force in the vertical direction (Z1 direction, Z2 direction) is applied when the composite boat 100 is raised and lowered, the fender 102 of the composite boat 100 is cradle due to the Z1 direction end portion and the Z2 direction end portion of the recess 7211. It becomes difficult to leave 7A.
(2) Even if the reinforcing portion 103 of the composite boat 100 is in contact with the fender portion 721 of the cradle 7A and stored for a long period of time, the fender 102 of the composite boat 100 is not deformed.
(3) When the fender 721 is formed of a solid member, the life can be extended as compared with the conventional D-type fender.

(Modified example of cradle chock 72)
Next, an optional additional configuration and / or a modification that can be adopted for the cradle chock 72 will be described.

(Modification example 1)
As shown in FIGS. 4, 7B and 7C, the cradle chock 72 may further include a flat fender 724 (724a, 724b) arranged adjacent to the fender 721 (721a, 721b). .. As described above, the reinforcing portion 103 can be formed on a part of the fender 102 of the composite boat 100, and the fender 102 on which the reinforcing portion 103 is not formed can be elastically deformed. For example, in the examples shown in FIGS. 4, 7B and 7C, when the composite boat 100 is raised and lowered, the reinforcing portion 103 abuts on the fender 721, and the force in the rotation direction R about the Z1 direction is applied to the composite boat 100. Imagine such a case. In that case, the fender 102 on which the reinforcing portion 103 is not formed comes into contact with the flat plate-shaped fender 724, so that the fender 102 is elastically deformed. Therefore, even if a force in the rotation direction R is generated when the composite boat 100 is raised and lowered, the frictional force between the flat plate-shaped fender plate 724 and the fender 102 increases as the contact area increases, so that the recess 7211 is formed. Even if it is not, the compound boat 100 can be prevented from slipping in the Z1 direction or the Z2 direction. The flat plate-shaped fender 724 may be formed of an elastic member such as rubber like the fender 721, and is lighter in weight and cheaper in manufacturing cost than the fender 721 in which the recess 7211 is formed. Therefore, when the fender 721 and the flat fender 724 are combined to manufacture the cradle chock 72, in addition to the effect of the cradle 7A according to the embodiment, the weight and manufacturing cost of the cradle chock 72 can be reduced. Play.

When the cradle chock 72 is formed by combining the flat fenders 724, the flat fenders 724 are formed on both sides of the fender 721 as shown in FIGS. 4, 7B and 7C. Just do it. Alternatively, a flat fender 724 may be formed on any side of the fender 721. Further, when the cradle chock 72 is formed by combining the flat fenders 724, as shown in FIG. 7B, the lowest portion of the recess 7211 formed in the fender 721 and the flat fender 724 have no step. It is preferable to be arranged. By arranging the composite boat 100 without a step, it is possible to prevent a force from being locally applied in the cross-sectional direction of the fender 102 of the composite boat 100.

(Modification 2)
FIG. 7D is a diagram showing a modified example of the fender 721. In the example shown in FIG. 7A, the fender 721 forming the recess 7211 is fixed to the base plate 722. Alternatively, as shown in FIG. 7D, a pair of fender-forming members 721c are attached to the conventional fender 18 (corresponding to the flat fender plate 724 of FIG. 7D) disclosed in Patent Document 3. By sticking, the fender 721 may be formed. In the cradle chock 72 shown in the second modification, in addition to the effect of the cradle 7A according to the embodiment, the fender 721 is formed by fixing the fender forming member 721c to the conventional cradle chock 72 that has already been used. It has the effect of being able to be manufactured.

It is clear that the cradle 7A is not limited to the above-described embodiment and modification, and the embodiment or modification can be appropriately modified or modified within the scope of the technical idea disclosed in the present application. In addition, any component used in the embodiment or modification can be combined with another embodiment or other modification, and any component can be omitted in the embodiment or modification. It is possible. For example, in the example shown in FIG. 4, two cradle chock 72s are provided, but three or four or more may be provided.

The cradle 7A described in the embodiment or the modified example can be suitably used for raising and lowering the composite boat 100 provided with the reinforcing portion 103 and for long-term storage, but is also used for raising and lowering the composite boat 100 not including the reinforcing portion 103. can. Even when a force in the ZI direction or the Z2 direction is applied when raising and lowering the composite boat 100 that does not include the reinforcing portion 103, the fender 102 can be held by the recess 7211 formed in the fender 721.

Further, by forming the recess 7211, the contact area between the fender 102 and the fender 721 increases, so that the contact pressure can be dispersed. Therefore, the deformation of the fender 102 can be suppressed by forming the recess 7211 as compared with the case where the conventional flat plate fender plate and the fender 102 of the composite boat 100 are in contact with each other. The contact pressure can be dispersed so that the outer shape of the fender 102 of the composite boat 100 and the inner shape of the recess 7211 of the fender 721 are designed to have substantially the same shape. Therefore, the composite boat 100 that does not include the reinforcing portion 103 can be stored for a long period of time. Further, the support member described in Patent Document 3 may be used only when the composite boat 100 not including the reinforcing portion 103 is pulled up and then stored for a long period of time, and the composite boat 100 may be held at a position separated from the boat David. ..

(Embodiment of Boat David)
An embodiment of Boat David will be described with reference to FIGS. 1 to 4 and 7. The boat David according to the embodiment is via a cradle 7A described in the embodiment and the modification of the cradle, a boat support arm provided with a pulley at the tip and erected apart from each other on the deck, and a pulley. Includes at least a wire that moves along and a winch for manipulating the wire. As the board David according to the embodiment, known members may be used except for the cradle 7A. For example, the boat support arm 2 and the pulley 3 shown in FIGS. 1 and 2 can be used as the boat support arms provided with pulleys at the tips and erected apart from each other on the deck. As the wire rod moving through the pulley 3, the rope 4 shown in FIGS. 1 and 2 can be used. Further, as the winch for operating the wire rod, the winch 5 shown in FIGS. 1 and 2 can be used. Further, the boat david may be produced by replacing the cradle of the boat david already in use (for example, the cradle 7 of FIG. 1) with any of the cradle 7A described in the embodiment and the modified example.

(Embodiment of the method of pulling up a compound boat)
Next, an embodiment of a method of pulling up a compound boat will be described with reference to FIGS. 1 to 4 and 7. The method of pulling up the compound boat is performed by using the boat David described in the above-described embodiment of the boat dabit. How to pull up a compound boat
(1) A step of bringing the fender 102 of the composite boat 100 into contact with the recess 7211 of the fender 721 of the cradle chock 72.
(2) A step of pulling up the composite boat 100 with the fender 102 of the composite boat 100 and the recess 7211 of the fender portion 721 of the cradle chock 72 in contact with each other.
including.

In the above step of contacting, if the composite boat 100 does not include the reinforcing portion 103, the fender 102 may be brought into contact with the recess 7211. Further, when the fender 102 of the composite boat 100 includes the reinforcing portion 103, the position may be adjusted so that the reinforcing portion 103 abuts on the recess 7211. By accommodating the fender 102 of the composite boat 100 in the recess 7211 of the fender 721, even if a force in the Z1 direction or the Z2 direction is applied to the composite boat 100 when the composite boat 100 is raised or lowered, the composite boat 100 is combined. The effect that the boat 100 is hard to leave the boat David can be obtained.

(Embodiment of storage method of compound boat)
Next, an embodiment of a storage method for the rigid inflatable boat will be described with reference to FIGS. 1 to 4 and 7. As for the storage method of the composite boat, the composite boat 100 pulled up by the above-mentioned pulling method of the composite boat is stored in a state where the fender 102 of the composite boat 100 and the recess 7211 of the fender 721 of the cradle chock 72 are in contact with each other. Including the process.

When the fender 102 of the composite boat 100 includes the reinforcing portion 103, the fender 102 of the composite boat 100 does not deform even if it is stored for a long period of time because the reinforcing portion 103 abuts on the recess 7211. Further, even when the composite boat 100 does not include the reinforcing portion 103, the contact pressure can be dispersed by increasing the contact area between the fender 102 and the fender 721 due to the formation of the recess 7211. Therefore, the deformation of the fender 102 can be suppressed as compared with the case where the conventional plate-shaped fender and the fender 102 of the composite boat 100 are in contact with each other. When the composite boat 100 that does not include the reinforcing portion 103 is pulled up and then stored for a long period of time, the composite boat 100 is separated from the boat David by using a support member or the like, and the composite boat 100 is separated at the separated position. A step of holding the above may be added.

By using the cradle 7A disclosed in the present application, it becomes difficult for the composite boat 100 to separate from the cradle 7A when the composite boat 100 is raised and lowered. Useful for the shipbuilding industry.

1 ... Deck, 2 ... A pair of boat support arms, 3 ... Slider, 4 ... Rope, 5 ... Winch, 6 ... Rope tip, 7, 7A ... Cradle, 8 ... Roller, 9 ... Mounted boat, 14 ... Rope mounting Block, 15 ... Launching rope, 16 ... Mounting tool, 17 ... Side of boat, 18 ... Fender, 71, 71a, 71b ... Main body, 711, 711a, 711b ... Roller support, 712, 712a ... Roller , 72, 72a, 72b ... Cradle chock, 721, 721a, 721b ... Fender, 7211a ... Recess, 721c ... Fender forming member, 722, 722a, 722b ... Base plate, 723, 723a ... Bolt, 724, 724a, 724b ... Flat plate fenders, 73, 73a, 73b ... Arms, 74 ... Horizontal, 75 ... Vertical, 100 ... Composite boats, 101 ... Ship body, 102 ... Fenders, 103 ... Reinforcing parts , 103a ... Reinforcing member,

Claims (9)

A cradle used for a boat dabit, the cradle is
With the main body
A cradle chock that is attached to the main body and comes into contact with the compound boat,
Including
The cradle chock includes a fender with a recess formed to accommodate the fender of the rigid inflatable boat.
Cradle. The fender is made of a solid elastic member,
The cradle according to claim 1. The cradle chock further includes a flat fender that is placed adjacent to the fender.
The cradle according to claim 1 or 2. The cradle chock includes a first cradle chock and a second cradle chock that are spaced apart.
The cradle according to any one of claims 1 to 3. The cradle according to any one of claims 1 to 4,
A boat support arm with a pulley at the tip and separated from each other on the deck,
Wires that move through pulleys and
A winch for operating the wire and
Including boat dabit. It is a method of pulling up a compound boat using a boat dabit.
Boat David
With the cradle,
A boat support arm with a pulley at the tip and separated from each other on the deck,
Wires that move through pulleys and
A winch for operating the wire and
Including
The cradle is
With the main body
A cradle chock that is attached to the main body and comes into contact with the compound boat,
Including
The cradle chock includes a fender with a recess formed to accommodate the fender of the rigid inflatable boat.
How to pull up a compound boat
The process of bringing the fender of the composite boat into contact with the recess of the fender of the cradle chock,
The process of pulling up the composite boat with the fender of the composite boat and the recess of the fender of the cradle chock in contact with each other.
How to pull up a compound boat, including. The fender is made of a solid elastic member,
The method for pulling up a compound boat according to claim 6. The fender of the composite boat includes the reinforcement part,
In the process of contacting, the reinforcing part is brought into contact with the recess of the fender of the cradle chock.
The method for pulling up a compound boat according to claim 6 or 7. A step of storing a composite boat pulled up by the method of pulling up a composite boat according to any one of claims 6 to 8 in a state where the fender of the composite boat and the recess of the fender of the cradle chock are in contact with each other.
Storage methods for rigid inflatable boats, including.

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