JP6964339B2

JP6964339B2 - How to hold the onboard boat using the boat davit and the onboard boat holding mechanism

Info

Publication number: JP6964339B2
Application number: JP2018073512A
Authority: JP
Inventors: 宏至田中; 正彦山脇
Original assignee: TECHNO ALPHA CO., LTD.
Current assignee: TECHNO ALPHA CO., LTD.
Priority date: 2018-04-05
Filing date: 2018-04-05
Publication date: 2021-11-10
Anticipated expiration: 2038-04-05
Also published as: JP2019182109A

Description

本発明は、ボートダビットを用いた搭載ボートの保持方法、および、搭載ボート保持機構に関する。 The present invention relates to a method of holding a mounted boat using a boat davit and a mounted boat holding mechanism.

船舶の甲板上に設置された救命ボート、警備救難艇、警備艇、潜水支援艇等の搭載された船艇（以下、搭載された船艇のことを「搭載ボート」と記載することがある。）を船外に移動するため、或いは、業務を終えた搭載ボートを船内に回収するための装置として、ボートダビットが知られている。図１乃至３は、従来から知られているボートダビットの一例を説明するための図である（特許文献１参照）。 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 to 3 are diagrams for explaining an example of a conventionally known boat davit (see Patent Document 1).

図１および図２に示す例では、ボートダビットＡは甲板１上に互いに離れて設けられた一対のボート支持用アーム２を有し、その先端にはそれぞれ、ロープ４を掛ける滑車３が設置されている。そしてボートダビットＡは図示のように、搭載ボート９の船側に備えられたクレードル７を含み、クレードル７の上端でアーム２とほぼ同じ間隔離れた二箇所にロープ取付ブロック１４が備えられ、そこに各ロープの先端６が繋がれている。また、クレードル７の両側には一連のローラー８が設置され、それらのローラー８はアーム２に沿って転がり移動するようになっている。搭載ボート９の船首および船尾近傍の二箇所にはロープを取り外し自在に取り付け得る取付具１６が固定され、クレードル７の上端の取付ブロック１４と搭載ボート９の取付具１６との間に張られた所定長のランチングストロープ１５によって搭載ボート９が支持される。そして、搭載ボート９の側面１７をクレードル７に接触するようにランチングストロープ１５を調整するとともに、側面１７に図３に示す防舷材１８を介在させることで、搭載ボート９の側面１７が破損することを防止している。 In the examples shown in FIGS. 1 and 2, the boat davit A has a pair of boat supporting arms 2 provided on the deck 1 apart from each other, and a pulley 3 for hanging a rope 4 is installed at the tip thereof. ing. As shown in the figure, the boat davit 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. Then, the launching rope 15 is adjusted so that the side surface 17 of the mounted boat 9 comes into contact with the cradle 7, and the side surface 17 of the mounted boat 9 is damaged by interposing the fender 18 shown in FIG. 3 on the side surface 17. It is prevented from doing.

図１および図２に示すボートダビットを用いて搭載ボート９を下降するには、ウインチ５によりロープ４を繰出せばよく、搭載ボート９のクレードル７と共に図１に示すように下降し、クレードルのローラー８はアーム２に沿って転がり移動し、アーム２の下端を越えると、船体の側面に沿って移動しつつ下降する。そして海面上に着水すると、ロープ４が弛むようになり、搭載ボート９の取付具１６からロープ４をはずせばよい。 In order to lower the mounted boat 9 using the boat davits 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 surface of the sea, the rope 4 becomes loose, and the rope 4 may be removed from the attachment 16 of the onboard boat 9.

また、図１および図２に示すクレードルを用いて搭載ボートを上昇して格納するには、下降とは逆に、クレードルのロープ取付ブロック１４に取付けられたランチングストロープ１５の下端を搭載ボートの取付具１６に固定し、次いでロープ４をウインチ５によって巻取ればよく、それによって搭載ボートは、初めは船体の側面に沿ってクレードル７と共に上昇し、次いで一対のアーム２に沿って上昇し、その際クレードル７はそれらのアームによって案内され、所定位置に収められる。このような搭載ボート９の昇降はローラー８によって極めて円滑になされる。 Further, in order to raise 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 used to raise and store the mounted boat. It may be fixed to the fixture 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. At that time, the cradle 7 is guided by those arms and is put in a predetermined position. The raising and lowering of such a mounting boat 9 is made extremely smooth by the rollers 8.

特許文献１に記載された発明では、搭載ボート９の下降はクレードルを介して一対のアームに沿って行われるので、船の運行中でも可能である。そして、その操作には従来のような搭載ボート９の船外への振出しが必要でなく、単にロープを繰出すのみであるため極めて簡単かつ迅速になし得る。さらに構造的にも船外への振出し機構が不必要であり、かつ荷重がアームの軸方向成分にかなり分散されるので、力学的にも有利であり、機構が単純になりかつコンパクト化できる。その上、搭載ボート９はクレードルと共にアームおよび船体に沿って昇降されるので、その移動が安定しており、従来の吊下げ方式に比べて、著しく安全性が向上される。 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, its movement is stable, and the safety is significantly improved as compared with the conventional suspension method.

特開２０１３−１８０７３１号公報Japanese Unexamined Patent Publication No. 2013-180731

特許文献１に記載の例では、取付ブロック１４と搭載ボート９の取付具１６との間に張られたランチングストロープ１５で搭載ボート９を保持している。そして図１に示すように、取付具１６は、ロープ取付ブロック１４より船外側に配置される。換言すると、ランチングストロープ１５は、取付ブロック１４から見て船外方向に配置される。したがって、ランチングストロープ１５が支える荷重のベクトル成分により、搭載ボート９にはクレードル７方向への力が常に働くことで、搭載ボート９はクレードル７に当接・保持される。 In the example described in Patent Document 1, the mounted boat 9 is held by a launching rope 15 stretched between the mounting block 14 and the mounting tool 16 of the mounting boat 9. Then, as shown in FIG. 1, the fixture 16 is arranged outside the ship from the rope mounting block 14. In other words, the launching rope 15 is arranged in the outboard direction when viewed from the mounting block 14. Therefore, due to the vector component of the load supported by the launching rope 15, a force in the direction of the cradle 7 always acts on the mounted boat 9, so that the mounted boat 9 comes into contact with and is held by the cradle 7.

ところで、近年、搭載ボート９として、従来のＦＲＰ製のボートに加え、複合艇が採用され始めている。複合艇は、インフレータブルボート（ゴムボート）を元に、船底をＦＲＰなど硬質の素材としており、船体はディープＶ型など滑走船型を採用している。これにより、低速時にはインフレータブルボートと同様に大きな予備浮力によって復原力が確保される一方、高速時の波浪衝撃にも耐えられる強度も確保されている。複合艇は、全体を硬性素材で製作したボートよりも軽量となるので高速を発揮でき、ブルワーク兼用のゴムチューブが防舷材としての機能を兼ねる。そのため、臨検などにおいて有用であり、また、ボートダビットで保持中はクレードル７に対する防舷材として機能する。 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 a hard material such as FRP, and the hull is a gliding boat type such as a 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, it is useful for inspections and the like, and also functions as a fender against the cradle 7 while being held by the boat davit.

しかしながら、特許文献１に記載のボートダビットは、上記のとおり、搭載ボート９にはクレードル７方向への力が常に働く。したがって、複合艇を長期間保持した場合、複合艇のクレードル７と接触する側面１７が凹んで変形するという新たな問題が発生した。 However, in the boat davit described in Patent Document 1, as described above, a force in the direction of the cradle 7 always acts on the mounted boat 9. Therefore, when the compound boat is held for a long period of time, a new problem has arisen in which the side surface 17 in contact with the cradle 7 of the compound boat is dented and deformed.

本発明は、上記問題を解決するためになされた発明で、鋭意研究を行ったところ、搭載ボートとボートダビットとの間を支持部材で繋ぐことで、ボートダビットに対する搭載ボートの水平方向位置を一定に保持することができ、その結果、ボートダビットで格納中の搭載ボートの側面がクレードルに必要以上に押し付けられることを防止できることを新たに見出し、本発明を完成した。 The present invention has been made to solve the above problems, and as a result of diligent research, the horizontal position of the mounted boat with respect to the boat davit is constant by connecting the mounted boat and the boat davit with a support member. As a result, it was newly found that the side surface of the on-board boat stored in the boat davit could be prevented from being pressed against the cradle more than necessary, and the present invention was completed.

すなわち、本発明は、ボートダビットを用いた搭載ボートの保持方法、および、搭載ボート保持機構を提供することである。 That is, the present invention provides a method for holding a mounted boat using a boat davit and a mounted boat holding mechanism.

本発明は、以下に示す、ボートダビットを用いた搭載ボートの保持方法、および、搭載ボート保持機構に関する。 The present invention relates to a method for holding a mounted boat using a boat davit and a mounted boat holding mechanism, which are described below.

（１）ボートダビットを用いた搭載ボートの保持方法であって、
前記ボートダビットは、
先端に滑車が設けられ、甲板上に互いに離れて建立された第１ボート支持用アームおよび第２ボート支持用アームと、
前記滑車を介して移動する第１線材と、
前記第１線材を操作するためのウインチと、
前記第１線材および第２線材を取り付け可能な第１取付ブロックおよび前記第１線材および第２線材を取り付け可能な第２取付ブロックを有し、前記第１ボート支持用アームおよび前記第２ボート支持用アームに沿って移動するクレードルと、
を具備し、
前記搭載ボートは、第１取付具および第２取付具
を具備し、
前記保持方法は、
前記第１線材の先端を前記第１取付ブロックに着脱自在に係合し、前記第２線材の一端を前記第１取付ブロックに着脱自在に係合し、前記第２線材の他端を前記第１取付具に着脱自在に係合し、
前記第１線材の先端を前記第２取付ブロックに着脱自在に係合し、前記第２線材の一端を前記第２取付ブロックに着脱自在に係合し、前記第２線材の他端を前記第２取付具に着脱自在に係合、
することで、前記搭載ボートの重力方向の荷重を保持し、
第１支持部材の一端を前記第１取付具に着脱自在に係合し、前記第１支持部材の他端を前記クレードルに着脱自在に係合し、
第２支持部材の一端を前記第２取付具に着脱自在に係合し、前記第２支持部材の他端を前記クレードルに着脱自在に係合、
することで、前記ボートダビットに対する前記搭載ボートの水平方向位置を保持する、
保持方法。
（２）前記第１支持部材の他端を前記クレードルに着脱自在に係合することに代え、前記第１支持部材の他端を前記第１ボート支持用アームに着脱自在に係合し、
前記第２支持部材の他端を前記クレードルに着脱自在に係合することに代え、前記第２支持部材の他端を前記第２ボート支持用アームに着脱自在に係合する、
上記（１）に記載の保持部材。
（３）前記第１支持部材および前記第２支持部材が、前記第１支持部材および前記第２支持部材の長手方向とは異なる方向の力を付与した時に前記第１支持部材および前記第２支持部材は長手方向に伸縮可能であり、前記第１支持部材および前記第２支持部材に長手方向の力を付与した時に前記第１支持部材および前記第２支持部材は長手方向に伸縮不能である、
上記（１）または（２）に記載の保持方法。
（４）前記第１支持部材の他端が前記クレードルに回動可能に取り付けられ、
前記第２支持部材の他端が前記クレードルに回動可能に取り付けられ、
ている、上記（１）〜（３）の何れか一つに記載の保持方法。
（５）前記第１支持部材の他端が前記第１ボート支持用アームに回動可能に取り付けられ、
前記第２支持部材の他端が前記第２ボート支持用アームに回動可能に取り付けられ、
ている、上記（１）〜（３）の何れか一つに記載の保持方法。
（６）ボートダビット、第２線材、第１支持部材および第２支持部材を含む搭載ボート保持機構であって、
前記ボートダビットは、
先端に滑車が設けられ、甲板上に互いに離れて建立された第１ボート支持用アームおよび第２ボート支持用アームと、
前記滑車を介して移動する第１線材と、
前記第１線材を操作するためのウインチと、
前記第１線材および第２線材を取り付け可能な第１取付ブロックおよび前記第１線材および第２線材を取り付け可能な第２取付ブロックを有し、前記第１ボート支持用アームおよび第２ボート支持用アームに沿って移動するクレードルと、
を具備し、
前記第２線材は、
一端を前記第１取付ブロックに着脱自在に係合し、他端を前記第１取付具に着脱自在に係合、および、
一端を前記第２取付ブロックに着脱自在に係合し、他端を前記第２取付具に着脱自在に係合、
するために用いられ、
前記第１支持部材は、
一端を前記第１取付具に着脱自在に係合し、他端を前記クレードルに着脱自在に係合、または、
一端を前記第１取付具に着脱自在に係合し、他端を前記第１ボート支持用アームに着脱自在に係合、
するために用いられ、
前記第２支持部材は、
一端を前記第２取付具に着脱自在に係合し、他端を前記クレードルに着脱自在に係合、または、
一端を前記第２取付具に着脱自在に係合し、他端を前記第２ボート支持用アームに着脱自在に係合、
するために用いられる、
ボート保持機構。
（７）前記第１支持部材および前記第２支持部材が、前記第１支持部材および前記第２支持部材の長手方向とは異なる方向の力を付与した時に前記第１支持部材および前記第２支持部材は長手方向に伸縮可能であり、前記第１支持部材および前記第２支持部材に長手方向の力を付与した時に前記第１支持部材および前記第２支持部材は長手方向に伸縮不能である、
上記（６）に記載の保持機構。 (1) A method of holding an onboard boat using a boat davit.
The boat davit
A first boat support arm and a second boat support arm, which are provided with pulleys at the tip and are erected apart from each other on the deck.
The first wire that moves through the pulley and
A winch for operating the first wire and
It has a first mounting block to which the first wire and the second wire can be attached and a second mounting block to which the first and second wires can be attached, and the first boat support arm and the second boat support. With a cradle that moves along the arm
Equipped with
The onboard boat includes a first fitting and a second fitting.
The holding method is
The tip of the first wire is detachably engaged with the first mounting block, one end of the second wire is detachably engaged with the first mounting block, and the other end of the second wire is detachably engaged with the first mounting block. 1 Detachably engage with the fixture,
The tip of the first wire is detachably engaged with the second mounting block, one end of the second wire is detachably engaged with the second mounting block, and the other end of the second wire is detachably engaged with the second mounting block. 2 Detachable engagement with the fixture,
By doing so, the load in the direction of gravity of the onboard boat is maintained.
One end of the first support member is detachably engaged with the first attachment, and the other end of the first support member is detachably engaged with the cradle.
One end of the second support member is detachably engaged with the second attachment, and the other end of the second support member is detachably engaged with the cradle.
By doing so, the horizontal position of the onboard boat with respect to the boat davit is maintained.
Holding method.
(2) Instead of detachably engaging the other end of the first support member with the cradle, the other end of the first support member is detachably engaged with the first boat support arm.
Instead of detachably engaging the other end of the second support member with the cradle, the other end of the second support member is detachably engaged with the second boat support arm.
The holding member according to (1) above.
(3) When the first support member and the second support member apply a force in a direction different from the longitudinal direction of the first support member and the second support member, the first support member and the second support member The members can be expanded and contracted in the longitudinal direction, and when a force is applied to the first support member and the second support member in the longitudinal direction, the first support member and the second support member cannot be expanded and contracted in the longitudinal direction.
The holding method according to (1) or (2) above.
(4) The other end of the first support member is rotatably attached to the cradle.
The other end of the second support member is rotatably attached to the cradle and
The holding method according to any one of (1) to (3) above.
(5) The other end of the first support member is rotatably attached to the first boat support arm.
The other end of the second support member is rotatably attached to the second boat support arm.
The holding method according to any one of (1) to (3) above.
(6) A boat holding mechanism including a boat davit, a second wire rod, a first support member, and a second support member.
The boat davit
A first boat support arm and a second boat support arm, which are provided with pulleys at the tip and are erected apart from each other on the deck.
The first wire that moves through the pulley and
A winch for operating the first wire and
It has a first mounting block to which the first wire and the second wire can be attached and a second mounting block to which the first and second wires can be attached, and is used for the first boat support arm and the second boat support. With a cradle that moves along the arm,
Equipped with
The second wire is
One end is detachably engaged with the first mounting block, the other end is detachably engaged with the first mounting tool, and
One end is detachably engaged with the second mounting block, and the other end is detachably engaged with the second mounting tool.
Used to
The first support member is
One end is detachably engaged with the first attachment, and the other end is detachably engaged with the cradle, or
One end is detachably engaged with the first attachment, and the other end is detachably engaged with the first boat support arm.
Used to
The second support member is
One end is detachably engaged with the second attachment, and the other end is detachably engaged with the cradle, or
One end is detachably engaged with the second attachment, and the other end is detachably engaged with the second boat support arm.
Used to
Boat holding mechanism.
(7) When the first support member and the second support member apply a force in a direction different from the longitudinal direction of the first support member and the second support member, the first support member and the second support member The members can be expanded and contracted in the longitudinal direction, and when a force is applied to the first support member and the second support member in the longitudinal direction, the first support member and the second support member cannot be expanded and contracted in the longitudinal direction.
The holding mechanism according to (6) above.

本発明のボートダビットを用いた搭載ボートの保持方法、および、搭載ボート保持機構を用いることで、ボートダビットで格納中の搭載ボートの側面がクレードルに必要以上に押し付けられることを防止できる。 By using the method of holding the mounted boat using the boat davit of the present invention and the mounted boat holding mechanism, it is possible to prevent the side surface of the mounted boat being stored by the boat davit from being pressed against the cradle more than necessary.

図１は、従来のボートダビットを説明するための正面図である。FIG. 1 is a front view for explaining a conventional boat davit. 図２は、従来のボートダビットを説明するための側面図である。FIG. 2 is a side view for explaining a conventional boat davit. 図３Ａ及びＢは、従来の防舷材を説明するための図である。3A and 3B are diagrams for explaining a conventional fender. 図４は、第１の実施形態において、支持部材（２０ａ）を用いて搭載ボートＢを保持している状態を示す正面図である。FIG. 4 is a front view showing a state in which the onboard boat B is held by using the support member (20a) in the first embodiment. 図５は、第１の実施形態において、支持部材の一端と取付具（１６ａ）および支持部材の他端とクレードル７との係合を解除した状態を示す正面図である。FIG. 5 is a front view showing a state in which one end of the support member and the attachment (16a) and the other end of the support member and the cradle 7 are disengaged in the first embodiment. 図６、第１の実施形態において、支持部材（２０ａ、２０ｂ）を用いて搭載ボートＢを保持している状態を示す上面図である。FIG. 6 is a top view showing a state in which the onboard boat B is held by using the support members (20a, 20b) in the first embodiment. 図７は、支持部材（２０ａ、２０ｂ）のその他の構成例の一例を示す図である。FIG. 7 is a diagram showing an example of other configuration examples of the support members (20a, 20b).

以下、図面を参照しつつ、本発明のボートダビットを用いた搭載ボートの保持方法、および、搭載ボート保持機構について、詳しく説明する。なお、本明細書において、同種の機能を有する部材には、同一または類似の符号が付されている。例えば、同一の数字の後ろにａ、ｂが記載されている「・・・部材〇ａ」と「・・・部材〇ｂ」は、同じ機能を有する。なお、「第１・・・部材」および「第２・・・部材」に共通する説明の場合は、「第１」および「第２」の記載を省略し「・・・部材」と記載することがある。また、同一または類似の符号の付された部材について、繰り返しとなる説明が省略される場合がある。更に、従来技術と同種または類似の機能を有する部材には、従来技術と同一または類似の符号が記載されている。 Hereinafter, a method of holding a mounted boat using the boat davit of the present invention and a mounted boat holding mechanism will be described in detail 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, "... member 〇a" and "... member 〇b" in which a and b are described after the same number have the same function. In addition, in the case of the explanation common to "first ... member" and "second ... member", the description of "first" and "second" is omitted and described as "... member". Sometimes. In addition, repeated description of members with the same or similar reference numerals may be omitted. Further, members having the same or similar functions as those of the prior art are designated by the same or similar reference numerals as those of the prior art.

（搭載ボート保持機構および搭載ボート保持方法の第１の実施形態）
図４乃至図６を参照して、搭載ボート保持機構および搭載ボート保持方法の第１の実施形態について説明する。図４は第１の実施形態において、第１支持部材２０ａ（第２支持部材２０ｂ）を用いて搭載ボートＢを保持している状態を示す正面図である。なお、第１取付具１６ａ（第２取付具１６ｂ）の説明の関係上、搭載ボートＢの船体は透視図となっている。図５は第１の実施形態において、第１支持部材２０ａ（第２支持部材２０ｂ）と第１取付具１６ａ（第１取付具１６ｂ）およびクレードル７との係合を解除した状態を示す正面図である。図６は、第２線材１５ａと第１支持部材２０ａ、第２支持部材２０ｂを用いて搭載ボートＢを保持している状態を示す上面図である。 (First Embodiment of the on-board boat holding mechanism and the on-board boat holding method)
A first embodiment of the on-board boat holding mechanism and the on-board boat holding method will be described with reference to FIGS. 4 to 6. FIG. 4 is a front view showing a state in which the mounted boat B is held by using the first support member 20a (second support member 20b) in the first embodiment. Due to the explanation of the first attachment 16a (second attachment 16b), the hull of the onboard boat B is a perspective view. FIG. 5 is a front view showing a state in which the first support member 20a (second support member 20b), the first attachment 16a (first attachment 16b), and the cradle 7 are disengaged in the first embodiment. Is. FIG. 6 is a top view showing a state in which the mounted boat B is held by using the second wire rod 15a, the first support member 20a, and the second support member 20b.

第１の実施形態における搭載ボート保持機構Ａ１は、ボートダビット、２本の第２線材（１５ａ）、第１支持部材２０aおよび第２支持部材２０ｂ、を少なくとも含む。 The onboard boat holding mechanism A1 in the first embodiment includes at least a boat davit, two second wire rods (15a), a first support member 20a and a second support member 20b.

ボートダビットは、
（１）先端に滑車３が設けられ甲板上に建立された第１ボート支持用アーム２ａと、滑車３を介して移動する第１線材４ａと、第１線材４ａを操作するためのウインチ５ａと、
（２）先端に滑車３が設けられ甲板上に第１ボート支持用アーム２ａとは離れて建立された第２ボート支持用アーム２ｂと、滑車３を介して移動する第１線材４ａと、第１線材４ａを操作するためのウインチ５ａと、
（３）第１線材４ａおよび第２線材１５ａを取り付け可能な第１取付ブロック１４ａ、および、第１線材４ａおよび第２線材１５ａを取り付け可能な第２取付ブロック１４ｂを先端に設け、第１ボート支持用アーム２ａおよび第２ボート支持用アーム２ｂに沿って移動するクレードル７と、
を少なくとも含む。 Boat davit
(1) A first boat support arm 2a provided with a pulley 3 at the tip and erected on the deck, a first wire rod 4a moving via the pulley 3, and a winch 5a for operating the first wire rod 4a. ,
(2) A second boat support arm 2b, which is provided with a pulley 3 at the tip and is erected on the deck apart from the first boat support arm 2a, a first wire rod 4a that moves via the pulley 3, and a first wire rod 4a. 1 Winch 5a for operating wire rod 4a and
(3) A first mounting block 14a to which the first wire rod 4a and the second wire rod 15a can be attached and a second mounting block 14b to which the first wire rod 4a and the second wire rod 15a can be attached are provided at the tip of the first boat. A cradle 7 that moves along the support arm 2a and the second boat support arm 2b,
At least include.

ボート支持用アーム（２ａ、２ｂ）は、図４に見られるように、滑車３を設けた先端側が、鉛直方向に対し船外方向に若干傾斜して船舶の甲板Ｃに固定されている。また、ボート支持用アーム（２ａ、２ｂ）は、クレードル７が沿って移動できる案内部２ａ１（案内部２ｂ１）が設けられている。クレードル７には、樹脂等の材料で作製したローラー８が設けられており、クレードル７のローラー８は、案内部２ａ１（案内部２ｂ１）に沿って移動することができる。 As seen in FIG. 4, the boat support arms (2a, 2b) are fixed to the deck C of the ship with the tip side on which the pulley 3 is provided slightly inclined in the outboard direction with respect to the vertical direction. Further, the boat support arms (2a, 2b) are provided with a guide portion 2a1 (guide portion 2b1) through which the cradle 7 can move. The cradle 7 is provided with a roller 8 made of a material such as resin, and the roller 8 of the cradle 7 can move along the guide portion 2a1 (guide portion 2b1).

２つの第２線材１５ａは、それぞれ、一端が取付ブロック（１４ａ、１４ｂ）と着脱自在に係合でき、他端が搭載ボートＢに設けられている取付具（１６ａ、１６ｂ）と着脱自在に係合できれば特に制限はなく、防錆金属製ワイヤー、ロープ等を用いることができる。着脱自在な係合手段としては、例えば、第２線材１５ａの先端にフックを設け、取付ブロック（１４ａ、１４ｂ）と取付具（１６ａ、１６ｂ）にフックを引掛ける方法が挙げられる。その際、必要に応じて、取付ブロック（１４ａ、１４ｂ）と取付具（１６ａ、１６ｂ）側に、フックを係合するための孔、或いは、孔を設けた板状部材を設けてもよい。また、第２線材１５ａの両端或いは一方の端部に孔が開いた板状部材を設け、取付ブロック（１４ａ、１４ｂ）と取付具（１６ａ、１６ｂ）側にも孔、或いは、孔を設けた板状部材を設け、孔同士を重ねてピンを挿入して係止してもよい。なお、搭載ボートＢを水面に下ろした後は、迅速に第２線材１５ａと取付具（１６ａ、１６ｂ）との係合を解除することが好ましい。したがって、第２線材１５ａと取付具（１６ａ、１６ｂ）の係合部分は、例えば、レバー操作により自動的に係合が解除できる機構を採用してもよい。 One end of each of the two second wires 15a can be detachably engaged with the mounting block (14a, 14b), and the other end can be detachably engaged with the mounting tool (16a, 16b) provided on the mounting boat B. If possible, there is no particular limitation, and rust-preventive metal wire, rope, or the like can be used. Examples of the detachable engaging means include a method in which a hook is provided at the tip of the second wire rod 15a and the hook is hooked on the mounting block (14a, 14b) and the mounting tool (16a, 16b). At that time, if necessary, a hole for engaging the hook or a plate-shaped member having a hole may be provided on the side of the mounting block (14a, 14b) and the mounting tool (16a, 16b). Further, a plate-shaped member having holes at both ends or one end of the second wire rod 15a is provided, and holes or holes are also provided on the mounting block (14a, 14b) and the mounting tool (16a, 16b) side. A plate-shaped member may be provided, and the holes may be overlapped with each other and a pin may be inserted to lock the holes. It is preferable that the second wire 15a and the attachments (16a, 16b) are quickly disengaged after the onboard boat B is lowered to the water surface. Therefore, the engaging portion between the second wire rod 15a and the attachments (16a, 16b) may employ, for example, a mechanism that can be automatically disengaged by operating a lever.

第１の実施形態では、支持部材（２０ａ、２０ｂ）の一端は取付具（１６ａ、１６ｂ）と着脱自在に係合でき、他端がクレードル７に対し着脱自在に係合することで、ボートダビットＡ１に対する搭載ボートＢの水平方向を所期の位置で保持できるようになっている。そのため、支持部材（２０ａ、２０ｂ）は、取付具（１６ａ、１６ｂ）側の一端（２１ａ、２１ｂ）とクレードル７側の他端（２２ａ、２２ｂ）とを結ぶ方向を「長手方向Ｘ」と規定した際に、搭載ボートＢを保持している状態で長手方向Ｘに伸縮不能な部材で形成することが望ましい。支持部材（２０ａ、２０ｂ）は、例えば、防錆処理した金属で作製した棒状部材、繊維強化樹脂材料で作製した棒状部材、防水処理した棒状の木材、等が挙げられる。第１の実施形態における、支持部材（２０ａ、２０ｂ）の一端と取付具（１６ａ、１６ｂ）との着脱自在な係合手段、支持部材（２０ａ、２０ｂ）の他端とクレードル７との着脱自在な係合手段としては、上記の第２線材１５ａと取付ブロック（１４ａ、１４ｂ）および取付具（１６ａ、１６ｂ）との係合手段と同様の手段が挙げられる。 In the first embodiment, one end of the support member (20a, 20b) can be detachably engaged with the fixture (16a, 16b), and the other end can be detachably engaged with the cradle 7 to form a boat davit. The horizontal direction of the onboard boat B with respect to A1 can be held at the desired position. Therefore, in the support member (20a, 20b), the direction connecting one end (21a, 21b) on the fixture (16a, 16b) side and the other end (22a, 22b) on the cradle 7 side is defined as "longitudinal direction X". At that time, it is desirable to form a member that cannot expand and contract in the longitudinal direction X while holding the mounted boat B. Examples of the support member (20a, 20b) include a rod-shaped member made of a rust-preventive metal, a rod-shaped member made of a fiber-reinforced resin material, and a waterproof-treated rod-shaped wood. In the first embodiment, one end of the support member (20a, 20b) and the attachment (16a, 16b) are detachably engaged with each other, and the other end of the support member (20a, 20b) is detachably attached to the cradle 7. Examples of the engaging means include the same means as those for engaging the second wire 15a with the mounting block (14a, 14b) and the mounting tool (16a, 16b).

次に、第１の実施形態の保持方法について説明する。第１の実施形態では、先ず、第１線材４ａの先端をクレードル７の取付ブロック（１４ａ、１４ｂ）に固定する。次に、水面上の搭載ボートＢの取付具（１６ａ、１６ｂ）に第２線材１５ａの一端を係合し、ウインチ５ａで第１線材４ａを繰り出してクレードル７をボート支持用アーム（２ａ、２ｂ）に沿って、水面近くまで移動する。次に、第２線材１５ａの一端を取付ブロック（１４ａ、１４ｂ）に係合し、第２線材１５ａの他端を取付具（１６ａ、１６ｂ）に係合する。そして、ウインチ５ａで第１線材４ａを巻き上げて搭載ボートＢを船舶内に引き上げる。図５が、搭載ボートＢを船舶内に引き上げた状態を示している。次に、支持部材（２０ａ、２０ｂ）の一端を取付具（１６ａ、１６ｂ）に係合し、支持部材（２０ａ、２０ｂ）の他端をクレードル７に係合することで、図４に示すように、搭載ボートＢをボートダビットに対する水平方向位置を維持した状態で保持できる。したがって、搭載ボートＢが複合艇であっても、複合艇の側面１７がクレードル７に押し付けられ凹むことが防止できる。なお、支持部材（２０ａ、２０ｂ）の長さは、搭載ボートＢが所期の位置となるように、搭載ボートＢの船幅に応じて好適の長さとなる部材を用いればよい。また、必要に応じて防舷材１８を備えてもよい。 Next, the holding method of the first embodiment will be described. In the first embodiment, first, the tip of the first wire rod 4a is fixed to the mounting block (14a, 14b) of the cradle 7. Next, one end of the second wire rod 15a is engaged with the attachments (16a, 16b) of the mounted boat B on the water surface, the first wire rod 4a is fed out by the winch 5a, and the cradle 7 is attached to the boat support arm (2a, 2b). ), Move closer to the surface of the water. Next, one end of the second wire 15a is engaged with the mounting block (14a, 14b), and the other end of the second wire 15a is engaged with the mounting tool (16a, 16b). Then, the first wire rod 4a is wound up by the winch 5a, and the onboard boat B is pulled up into the ship. FIG. 5 shows a state in which the onboard boat B is pulled up into the ship. Next, one end of the support member (20a, 20b) is engaged with the fixture (16a, 16b), and the other end of the support member (20a, 20b) is engaged with the cradle 7, as shown in FIG. In addition, the mounted boat B can be held while maintaining the horizontal position with respect to the boat davit. Therefore, even if the mounted boat B is a composite boat, it is possible to prevent the side surface 17 of the composite boat from being pressed against the cradle 7 and being dented. The length of the support members (20a, 20b) may be a suitable length according to the width of the onboard boat B so that the onboard boat B is at the desired position. In addition, the fender 18 may be provided as needed.

また、第１の実施形態の搭載ボートの保持方法および保持機構は、複合艇の保持に特に有用であるが、搭載ボートＢの水平方向の位置ずれを防止できるので、従来から船舶に搭載されているＦＲＰ製の搭載ボートの保持にも有用である。 Further, the holding method and holding mechanism of the mounted boat of the first embodiment are particularly useful for holding the composite boat, but since the mounting boat B can be prevented from being displaced in the horizontal direction, it has been conventionally mounted on a ship. It is also useful for holding FRP onboard boats.

図４に示す搭載ボートＢを保持した状態から搭載ボートＢを水面に下ろす場合は、先ず、支持部材（２０ａ、２０ｂ）と取付具（１６ａ、１６ｂ）およびクレードル７との係合を解除することで、図５に示す状態にする。なお、支持部材（２０ａ、２０ｂ）とクレードル７との係合の解除は必須ではなく任意である。そして、ウインチ５ａにより第１線材４ａを繰り出してクレードル７を水面付近まで下げ、搭載ボートＢが水面に浮かんだ状態で、第２線材１５ａと取付具（１６ａ、１６ｂ）の係合を解除すればよい。なお、第１の実施形態においては、搭載ボートＢとクレードル７は一緒に動く。したがって、支持部材（２０ａ、２０ｂ）と取付具（１６ａ、１６ｂ）との係合の解除は、搭載ボートＢを水面に浮かべた後に行ってもよい。 When lowering the mounted boat B to the water surface while holding the mounted boat B shown in FIG. 4, first, the support members (20a, 20b), the fittings (16a, 16b), and the cradle 7 are disengaged. Then, the state shown in FIG. 5 is set. The disengagement between the support members (20a, 20b) and the cradle 7 is not essential but optional. Then, if the first wire rod 4a is extended by the winch 5a, the cradle 7 is lowered to the vicinity of the water surface, and the mounting boat B is floating on the water surface, the engagement between the second wire rod 15a and the fixtures (16a, 16b) is released. good. In the first embodiment, the mounted boat B and the cradle 7 move together. Therefore, the disengagement between the support member (20a, 20b) and the attachment (16a, 16b) may be disengaged after the onboard boat B is floated on the water surface.

また、搭載ボートＢを船外で使用する際に、支持部材（２０ａ、２０ｂ）の一端（２１ａ、２１ｂ）と取付具（１６ａ、１６ｂ）との係合の解除は必須であるが、支持部材（２０ａ、２０ｂ）の他端（２２ａ、２２ｂ）とクレードル７との係合解除は必須ではない。そのため、支持部材（２０ａ、２０ｂ）の他端（２２ａ、２２ｂ）とクレードル７とは、回動可能に取り付けられてもよい。回動可能に取り付けられた場合は、係合を解除する作業が不要で、作業効率が向上する。また、支持部材（２０ａ、２０ｂ）の紛失が防止できる。 Further, when the onboard boat B is used outboard, it is essential to disengage the one end (21a, 21b) of the support member (20a, 20b) from the fixture (16a, 16b), but the support member It is not essential to disengage the other end (22a, 22b) of (20a, 20b) from the cradle 7. Therefore, the other ends (22a, 22b) of the support members (20a, 20b) and the cradle 7 may be rotatably attached. When it is rotatably attached, the work of disengaging it is unnecessary and the work efficiency is improved. In addition, the support members (20a, 20b) can be prevented from being lost.

なお、支持部材（２０ａ、２０ｂ）の他端（２２ａ、２２ｂ）とクレードル７が回動可能に取り付けられる場合、図５に示すように、支持部材（２０ａ、２０ｂ）の一端（２１ａ、２１ｂ）は、クレードル７と係止できるように構成してもよい。その場合、（１）支持部材（２０ａ、２０ｂ）の不使用時は、クレードル７と一体化できるので、作業の邪魔にならず、支持部材（２０ａ、２０ｂ）が破損するリスク、（２）支持部材（２０ａ、２０ｂ）を海に落とす（海没）リスク、が低下する。 When the other end (22a, 22b) of the support member (20a, 20b) and the cradle 7 are rotatably attached, one end (21a, 21b) of the support member (20a, 20b) is attached as shown in FIG. May be configured so that it can be locked with the cradle 7. In that case, (1) when the support member (20a, 20b) is not used, it can be integrated with the cradle 7, so that it does not interfere with the work and there is a risk that the support member (20a, 20b) will be damaged, (2) support. The risk of dropping the members (20a, 20b) into the sea (submersion in the sea) is reduced.

（搭載ボート保持機構および搭載ボート保持方法の第２の実施形態）
次に、搭載ボート保持機構および搭載ボート保持方法の第２の実施形態について説明する。第２の実施形態では、図示は省略するが、支持部材（２０ａ、２０ｂ）の他端（２２ａ、２２ｂ）がクレードル７ではなく、ボート支持用アーム（２ａ、２ｂ）と着脱自在に係合できるようになっている。クレードル７とは異なり、ボート支持用アーム（２ａ、２ｂ）は船舶の甲板Ｃに固定され不動である。そのため、第２の実施形態は、搭載ボートＢの保持方法との観点では第１の実施形態と同様であるが、搭載ボートＢを水面に下ろす前に、支持部材（２０ａ、２０ｂ）の一端（２１ａ、２１ｂ）と取付具（１６ａ、１６ｂ）との係合の解除が必須である点で第１の実施形態と異なる。第２の実施形態においても、支持部材（２０ａ、２０ｂ）の他端（２２ａ、２２ｂ）とボート支持用アーム（２ａ、２ｂ）とは回動可能に取り付けられてもよく、また、支持部材（２０ａ、２０ｂ）の一端（２１ａ、２１ｂ）とボート支持用アーム（２ａ、２ｂ）とが係止できるように構成してもよい。 (Second embodiment of the on-board boat holding mechanism and the on-board boat holding method)
Next, a second embodiment of the on-board boat holding mechanism and the on-board boat holding method will be described. In the second embodiment, although not shown, the other ends (22a, 22b) of the support members (20a, 20b) can be detachably engaged with the boat support arms (2a, 2b) instead of the cradle 7. It has become like. Unlike the cradle 7, the boat support arms (2a, 2b) are fixed to the deck C of the ship and are immovable. Therefore, the second embodiment is the same as the first embodiment in terms of the method of holding the mounted boat B, but before lowering the mounted boat B to the water surface, one end (20a, 20b) of the support member (20a, 20b) ( It differs from the first embodiment in that it is essential to disengage the attachment (16a, 16b) from the 21a, 21b). Also in the second embodiment, the other end (22a, 22b) of the support member (20a, 20b) and the boat support arm (2a, 2b) may be rotatably attached, and the support member (20a, 2b) may be rotatably attached. 20a, 20b) may be configured so that one end (21a, 21b) and the boat support arm (2a, 2b) can be locked.

（支持部材（２０ａ、２０ｂ）のその他の構成例）
上記のとおり、支持部材（２０ａ、２０ｂ）は長手方向に伸縮不能であることが望ましい。しかしながら、搭載ボートＢの船幅が異なる場合、船幅に応じた支持部材（２０ａ、２０ｂ）を準備する必要がある。そのため、支持部材（２０ａ、２０ｂ）を、支持部材（２０ａ、２０ｂ）の長手方向とは異なる方向の力を付与した時に長手方向に伸縮可能とし、長手方向の力を付与した時には長手方向に伸縮不能となるように構成してもよい。 (Other configuration examples of support members (20a, 20b))
As described above, it is desirable that the support members (20a, 20b) cannot be expanded and contracted in the longitudinal direction. However, when the width of the onboard boat B is different, it is necessary to prepare support members (20a, 20b) according to the width of the boat. Therefore, the support members (20a, 20b) can be expanded and contracted in the longitudinal direction when a force different from the longitudinal direction of the support members (20a, 20b) is applied, and can be expanded and contracted in the longitudinal direction when a force in the longitudinal direction is applied. It may be configured to be impossible.

図７は、支持部材（２０ａ、２０ｂ）のその他の構成例の一例を示す図である。図７に示す例では、支持部材（２０ａ、２０ｂ）は、一端（２１ａ、２１ｂ）側の支持部材第１部分（２３ａ、２３ｂ）と他端（２２ａ、２２ｂ）側の支持部材第２部分（２４ａ、２４ｂ）に分割されている。そして、支持部材第１部分（２３ａ、２３ｂ）と支持部材第２部分（２４ａ、２４ｂ）は、胴部（２５ａ、２５ｂ）で連結されている。また、胴部（２５ａ、２５ｂ）の両端には逆ネジとなるようにネジ山が切られ、支持部材第１部分（２３ａ、２３ｂ）と支持部材第２部分（２４ａ、２４ｂ）にもネジが切られており、いわゆる、ターンバックルの構造となっている。したがって、支持部材（２０ａ、２０ｂ）は、長手方向を中心軸にして胴部（２５ａ、２５ｂ）を回転した時には長手方向に伸縮するが、長手方向に力がかかっても伸縮不能である。したがって、図７に示す支持部材（２０ａ、２０ｂ）を用いた場合、船幅が異なった場合でも、ボートダビットに対する搭載ボートＢの水平方向を所期の位置に設定・保持できる。 FIG. 7 is a diagram showing an example of other configuration examples of the support members (20a, 20b). In the example shown in FIG. 7, the support member (20a, 20b) has a support member first portion (23a, 23b) on one end (21a, 21b) side and a support member second portion (22a, 22b) on the other end (22a, 22b) side. It is divided into 24a and 24b). The first portion (23a, 23b) of the support member and the second portion (24a, 24b) of the support member are connected by a body portion (25a, 25b). Further, threads are cut at both ends of the body portion (25a, 25b) so as to be reverse threads, and screws are also provided on the first portion (23a, 23b) of the support member and the second portion (24a, 24b) of the support member. It is cut and has a so-called turnbuckle structure. Therefore, the support members (20a, 20b) expand and contract in the longitudinal direction when the body portion (25a, 25b) is rotated around the longitudinal direction, but cannot expand and contract even when a force is applied in the longitudinal direction. Therefore, when the support members (20a, 20b) shown in FIG. 7 are used, the horizontal direction of the mounted boat B with respect to the boat davit can be set and held at the desired position even if the ship width is different.

なお、図７は支持部材（２０ａ、２０ｂ）のその他の構成例の一例を示しているに過ぎず、例えば、ネジ山が切られている円柱と中空の筒状体を組合わせ、円柱と筒状体を相対回転した時に伸縮可能となる伸縮棒を用いてもよい。 Note that FIG. 7 shows only an example of other configuration examples of the support members (20a, 20b). For example, a threaded cylinder and a hollow cylinder are combined to form a cylinder and a cylinder. An expansion / contraction rod that can be expanded / contracted when the shape is relatively rotated may be used.

本発明により、ボートダビットで格納中の搭載ボートの側面がクレードルに必要以上に押し付けられることを防止できる。したがって、造船産業にとって有用である。 According to the present invention, it is possible to prevent the side surface of the onboard boat stored in the boat davit from being pressed against the cradle more than necessary. Therefore, it is useful for the shipbuilding industry.

Ａ…ボートダビット、１…甲板、２…一対のボート支持用アーム、２ａ…第１ボート支持用アーム、２ｂ…第２ボート支持用アーム、２ａ１…第１案内部、２ｂ１…第２案内部、３…滑車、４…ロープ、４ａ…第１線材、５、５ａ…ウインチ、６…ロープの先端、７…クレードル、８…ローラー、９…搭載ボート、１４…ロープ取付ブロック、１４ａ…第１取付ブロック、１４ｂ…第２取付ブロック、１５…ランチングストロープ、１５ａ…第２線材、１６…取付具、１６ａ…第１取付具、１６ｂ…第２取付具、１７…搭載ボートの側面、１８…防舷材、２０ａ…第１支持部材、２０ｂ…第２支持部材、２１ａ…第１支持部材の一端、２１ｂ…第２支持部材の一端、２２ａ…第１支持部材の他端、２２ｂ…第２支持部材の他端、２３ａ…第１支持部材第１部分、２３ｂ…第２支持部材第１部分、２４ａ…第１支持部材第２部分、２４ｂ…第２支持部材第２部分、２５ａ…第１胴部、２５ｂ…第２胴部、Ａ１…ボートダビット、Ｂ…搭載ボート、Ｃ…甲板 A ... Boat dabit, 1 ... Deck, 2 ... A pair of boat support arms, 2a ... 1st boat support arm, 2b ... 2nd boat support arm, 2a1 ... 1st guide part, 2b1 ... 2nd guide part, 3 ... Slider, 4 ... Rope, 4a ... 1st wire, 5, 5a ... Winch, 6 ... Rope tip, 7 ... Cradle, 8 ... Roller, 9 ... Mounted boat, 14 ... Rope mounting block, 14a ... 1st mounting Block, 14b ... 2nd mounting block, 15 ... Launching rope, 15a ... 2nd wire, 16 ... Mounting tool, 16a ... 1st mounting tool, 16b ... 2nd mounting tool, 17 ... Side of mounted boat, 18 ... Protective Boat, 20a ... 1st support member, 20b ... 2nd support member, 21a ... 1 end of 1st support member, 21b ... 1 end of 2nd support member, 22a ... other end of 1st support member, 22b ... 2nd support The other end of the member, 23a ... 1st support member 1st part, 23b ... 2nd support member 1st part, 24a ... 1st support member 2nd part, 24b ... 2nd support member 2nd part, 25a ... 1st body Part, 25b ... 2nd body, A1 ... Boat dabit, B ... Onboard boat, C ... Deck

Claims

It is a method of holding an onboard boat using a boat davit.
The boat davit
A first boat support arm and a second boat support arm, which are provided with pulleys at the tip and are erected apart from each other on the deck.
The first wire that moves through the pulley and
A winch for operating the first wire and
It has a first mounting block to which the first wire and the second wire can be attached and a second mounting block to which the first and second wires can be attached, and the first boat support arm and the second boat support. With a cradle that moves along the arm
Equipped with
The onboard boat includes a first fitting and a second fitting.
The holding method is
The tip of the first wire is detachably engaged with the first mounting block, one end of the second wire is detachably engaged with the first mounting block, and the other end of the second wire is detachably engaged with the first mounting block. 1 Detachably engage with the fixture,
The tip of the first wire is detachably engaged with the second mounting block, one end of the second wire is detachably engaged with the second mounting block, and the other end of the second wire is detachably engaged with the second mounting block. 2 Detachable engagement with the fixture,
By doing so, the load in the direction of gravity of the onboard boat is maintained.
One end of the first support member is detachably engaged with the first attachment, and the other end of the first support member is detachably engaged with the cradle.
One end of the second support member is detachably engaged with the second attachment, and the other end of the second support member is detachably engaged with the cradle.
By doing so, the horizontal position of the onboard boat with respect to the boat davit is maintained.
Holding method.

Instead of detachably engaging the other end of the first support member with the cradle, the other end of the first support member is detachably engaged with the first boat support arm.
Instead of detachably engaging the other end of the second support member with the cradle, the other end of the second support member is detachably engaged with the second boat support arm.
The holding method according to claim 1.

When the first support member and the second support member apply a force in a direction different from the longitudinal direction of the first support member and the second support member, the first support member and the second support member are longitudinal. It is expandable and contractible in the direction, and when a force is applied to the first support member and the second support member in the longitudinal direction, the first support member and the second support member cannot be expanded and contracted in the longitudinal direction.
The holding method according to claim 1 or 2.

Instead of detachably engaging the other end of the first support member with the cradle, the other end of the first support member is rotatably attached to the cradle.
Instead of detachably engaging the other end of the second support member with the cradle, the other end of the second support member is rotatably attached to the cradle.
The holding method according to claim 1.

Instead of detachably engaging the other end of the first support member with the cradle, the other end of the first support member is rotatably attached to the first boat support arm.
Instead of detachably engaging the other end of the second support member with the cradle, the other end of the second support member is rotatably attached to the second boat support arm.
The holding method according to claim 1.

A boat holding mechanism that includes a boat davit, a second wire, a first support member, and a second support member.
The boat davit
A first boat support arm and a second boat support arm, which are provided with pulleys at the tip and are erected apart from each other on the deck.
The first wire that moves through the pulley and
A winch for operating the first wire and
It has a first mounting block to which the first wire and the second wire can be attached and a second mounting block to which the first and second wires can be attached, and is used for the first boat support arm and the second boat support. With a cradle that moves along the arm,
Equipped with
The second wire is
One end is detachably engaged with the first mounting block, the other end is detachably engaged with the first mounting tool of the mounted boat, and
One end is detachably engaged with the second mounting block, and the other end is detachably engaged with the second mounting tool of the mounted boat.
Used to
The first support member is
One end is detachably engaged with the first attachment, and the other end is detachably engaged with the cradle, or
One end is detachably engaged with the first attachment, and the other end is detachably engaged with the first boat support arm.
Used to
The second support member is
One end is detachably engaged with the second attachment, and the other end is detachably engaged with the cradle, or
One end is detachably engaged with the second attachment, and the other end is detachably engaged with the second boat support arm.
Used to
Boat holding mechanism.

When the first support member and the second support member apply a force in a direction different from the longitudinal direction of the first support member and the second support member, the first support member and the second support member are longitudinal. It is expandable and contractible in the direction, and when a force is applied to the first support member and the second support member in the longitudinal direction, the first support member and the second support member cannot be expanded and contracted in the longitudinal direction.
The boat holding mechanism according to claim 6.