KR20140133348A - Locking system for canister-type thruster - Google Patents

Abstract

A locking device for a canister-type thruster is disclosed. The locking device for a canister-type thruster according to an embodiment of the present invention comprises: a canister lifted inside a trunk of a hull or a floating structure; a thruster arranged in the lower part of the canister to be lifted with the canister; and a locking device for locking the canister in the trunk. The locking device comprises: held rods horizontally protruding from the outer surface of the canister to be held; and multiple holding members fixed on the inner surface of the trunk, and arranged in relevant positions to hold the held rods. The multiple holding members include first holding members having a holding groove in which each held rod is inserted when the thruster is positioned below the bottom surface of the hull; and second holding members on which the held rods are placed in a state where the thruster is entered into the trunk. The bottom surface of the first holding members is opened. The top of the holding grooves is inclined downward toward the inner surface of the trunk. The top of the held rods is inclined downward toward the inner surface of the trunk corresponding to the shape of the holding grooves to be inserted in the holding grooves of the first holding members.

Description

[0001] LOCKING SYSTEM FOR CANISTER-TYPE THRUSTER [0002]

The present invention relates to a canister-type thruster restraint apparatus, and more particularly, to a canister-type thruster restraint apparatus that can simplify the structure and increase the efficiency of installation work.

Special vessels, such as drillships, must be able to berth in the working area of the sea, so a Dynamic Positioning System is needed to maintain its position even under the influence of algae, wind and digging. Therefore, these ships have a thruster that can control the position of the ship by generating propulsion force while changing direction in the water.

However, since the conventional thruster is installed in the lower part of the hull (underwater), there is a problem that it is difficult to repair or replace if a failure occurs. In the event of a breakdown at sea, it may be necessary to move the hull to the land where the dock is located for repair. A canister type thruster is proposed to solve these operational difficulties and to be able to perform repair or replacement work on the thruster in the maritime work area.

Korean Published Patent Application No. 10-2011-0139545 (published on December 29, 2011) and Published Patent Application No. 10-2010-0074397 (published on May 07, 2010) each show an example of a canister type thruster . The canister type thruster includes a canister installed to raise and lower in a trunk extending from a deck to a bottom of the hull, a propulsion head installed at a lower portion of the canister and capable of switching the direction of 360 degrees, driving devices for operating the propulsion head in the canister A lifting device for lifting and lowering the canister, a guiding device for guiding the lifting and lowering of the canister, and a sealing device for forming a watertight structure between the canister and the trunk at the lower end of the canister.

Such a thruster can change the position of the propelling head through lifting and lowering of the canister. It is possible to switch to an operation mode in which the propulsion head is positioned below the hull bottom, a movement mode in which the propulsion head is pulled up into the trunk when the hull is operated, and a maintenance mode in which the propulsion head is pulled up to the maintenance area inside the hull . It is also possible to use a crane or the like to raise the canister and the propelling head together and separate them from the hull. Thus, in a state in which the propulsion head is switched to the operation mode, the movement mode, or the maintenance mode, a restraining device for restraining the canister without shaking is required.

On the other hand, the canister is difficult to handle because it is a huge structure having a width of about 5 to 6 m in cross section and a height of about 10 m. The weight of the canister and the device mounted thereon is also very large. Therefore, there are many difficulties in fixing the canister in position with the propulsion head switched to an operating mode, a moving mode, and the like. This is because accurate integration of the restraint device provided between the canister and the trunk is required, and if an error occurs in selecting the installation position in the process of installing the restraint device, the canister or the trunk may be damaged.

Korean Patent Publication No. 10-2012-0003161 (published on Jan. 10, 2012)

The embodiments of the present invention are intended to provide a canister-type thruster restraint apparatus which can simplify the structure and can be easily manufactured and can be easily managed.

The embodiments of the present invention are intended to provide a canister-type thruster restraint apparatus capable of efficiently performing installation work of a canister and a trunk.

An embodiment of the present invention is to provide a canister-type thruster restraint device which can reduce manufacturing costs as the structure is simplified, and can improve productivity.

The embodiments of the present invention are intended to provide a canister-type thruster restraint device capable of effectively restraining not only vertical vibration but also horizontal vibration and rotation of the canister, thereby stably restricting the canister in the trunk.

SUMMARY OF THE INVENTION An embodiment of the present invention is to provide a restraint device for a canister type thruster capable of adjusting the degree of squeezing of a sealing material provided on a bottom surface of a canister to form a watertight structure.

According to an aspect of the present invention, there is provided a canister for a vehicle, comprising: a canister that ascends and descends in a trunk of a hull or a floating structure; a thruster provided at a lower portion of the canister to ascend and descend with the canister; and a restraining device for restraining the canister in the trunk And the restricting device includes a latching rod projecting horizontally from the outside of the canister to implement latching; And a plurality of engaging members which are fixed to the inner surface of the trunk and are provided at corresponding positions so that the engaging rods can enter and engage with each other, wherein the plurality of engaging members are positioned such that the thrusters are positioned below the bottom of the hull A first latching member having a latching groove into which the latching rod is inserted; And a second engaging member on which the engaging rod is placed while the thruster is pulled into the trunk, wherein the first engaging member is opened on the lower surface and the upper end of the engaging groove is moved toward the trunk inner surface And the engagement rod is provided so as to be inclined downwardly in accordance with the shape of the engagement groove so that the upper end of the engagement rod is inclined downward toward the inner surface of the trunk and is inserted into the engagement groove of the first engagement member, Can be provided.

When the latching rod enters the second latching member, the lower surface of the latching rod may be arranged to extend over the upper surface of the second latching member.

The upper surface of the second latching member and the lower surface of the latching rod may be horizontally and flatly provided.

A supporting rib may be provided between the upper surface of the first engaging member or the lower surface of the second engaging member and the inner surface of the trunk to secure a supporting force.

And a driving unit including a motor or a hydraulic cylinder that provides power to project the latching rod to the outside of the canister.

And a sealing device for forming a watertight structure between the canister seat on which the canister is placed and the canister when the thruster is positioned below the bottom of the hull.

The sealing device may include an elastically deformable sealing material to form a watertight structure and the sealing material may protrude from the bottom surface of the canister at the inner side of the skirt provided around the lower end of the canister and may be provided between the canister seat and the bottom surface of the canister. have.

And the degree of squeezing of the sealing material may be adjusted according to a length of the locking rod when the locking rod enters the locking groove of the first locking member.

The restraint device of the canister type thruster according to the embodiment of the present invention simplifies the structure of the latching member provided on the inner surface of the trunk, and is easy to manufacture, can improve the productivity, and has a manufacturing cost reduction effect.

The canister-type thruster restraining apparatus according to the embodiment of the present invention can restrain the canister stably without staggering even if the engaging rod protruding from the canister and the engaging member provided on the inner surface of the trunk are not correctly assembled, The work efficiency can be improved since the installation work does not require precise work.

The canister-type thruster restraint apparatus according to the embodiment of the present invention can stably restrain the canister in the trunk by preventing the canister from vibrating in the vertical direction as well as vibrating and rotating in the horizontal direction.

The restraint device of the canister type thruster according to the embodiment of the present invention can control the degree of compression of the sealing material forming the watertight structure at the lower surface of the canister depending on the degree of entry into the engagement rod entering the engagement member, thereby improving the durability of the sealing device .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a canister type thruster including a canister type thruster restraining apparatus according to an embodiment of the present invention, in a hull attachment state. Fig.
2 is a perspective view of a canister in a state in which a latching rod of a canister-type thruster restraining device is protruded according to an embodiment of the present invention.
Figs. 3 to 5 are cross-sectional views taken along line AA of Fig. 1, showing the canister moved to the operating mode, the moving mode, and the maintenance mode, respectively.
6 (a) is a perspective view of the first engaging member, and Fig. 6 (b) is a perspective view of the first engaging member of the first engaging member. Fig. And Fig. 6 (c) is a perspective view in a state in which a support rib is provided in the first engagement member.
FIG. 7 is a perspective view of a latching rod of a canister type thruster restraint apparatus according to an embodiment of the present invention, FIG. 7 (a) is a perspective view of the latching rod, and FIG. 7 (b) is a cross-sectional view of the latching rod.
Fig. 8 (a) is a perspective view of a second engaging member of a restraining device for a canister type thruster according to an embodiment of the present invention in which a supporting rib is provided, Fig. 8 (b) FIG.
Fig. 9 is an enlarged cross-sectional view of a portion B in Fig. 3, and is a sectional view steply showing the degree of squeezing of a sealing material of the sealing device according to the degree to which the latching rod of the restraint device enters the first latching device.
10 (a) is a perspective view showing a first engaging member included in a restraint device of a canister type thruster according to another embodiment of the present invention, and FIG. 10 (b) is a perspective view showing a canister- Fig. 2 is a perspective view showing a latching rod included in the restraint device of the stamper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 is a cross-sectional view showing a hull attachment state of a canister type thruster including a canister type thruster restraint device 150 according to an embodiment of the present invention.

The canister-type thruster 100 can be applied to a ship or a floating structure that needs to maintain an anchoring state in the working area of the sea. For example, it can be applied to drillships drilling for oil and gas resources, floating production storage offloading (FPSO), and so on. The canister type thruster 100 can be applied to special ships such as a tugboat, icebreaker, and the like as well as ordinary transportation vessels in addition to the case where position control is required in an anchored state.

Referring to FIGS. 1 and 2, a hull (or floating structure) of a ship to which a restraint device 150 of a canister type thruster is applied has a trunk 2 penetrating in the vertical direction. The thruster 100 includes a canister 110 installed in the trunk 2 so as to be able to move up and down, a propulsion head 130 installed at a lower portion of the canister 110, a lifting device 140 moving the canister 110 up and down, A sealing device 160 that forms a watertight structure between the canister 110 and the canister 110b on which the canister 110 is placed, and a canister 110 that forms a watertight structure between the canister 110 and the canister 110, And a restraining device 150 for restraining the vehicle body 1 in the trunk 2 without shaking.

1 to 5, the canister 110 may be provided in the form of a square box in which the lower portion and the side portion thereof are watertight. The trunk 2 of the hull 1 may be in the form of a rectangular barrel slightly larger than the canister 110. The canister 110 and the trunk 2 may have a hexagonal, octagonal, or circular cross-sectional shape, but the present invention is not limited thereto. It should be understood that the same applies also to the case of applying to various shapes such as the above.

As shown in FIG. 1, the canister 110 can be divided into a plurality of spaces by a plurality of decks 112, 113, and 114 spaced apart from each other in the vertical direction. The lower compartment 116 between the bottom plate 111 and the first deck 112 from the lower side of the canister 110, the drive device room 117 between the first deck 112 and the second deck 113, An auxiliary equipment room 118 between the second deck 113 and the third deck 114 and an upper compartment 119 between the third deck 114 and the top plate 115. In addition, a ladder 120 may be installed vertically in the canister 110 so that the operator can easily move to each space.

A drive motor 121 for driving a propulsion head 130 to be described later is installed in the drive device room 117 and various control equipment and power supply equipment for controlling the operation of the thruster 100 are installed in the auxiliary equipment room 118 Can be installed. In order to facilitate understanding of the present invention, the internal configuration of the canister 110 is merely an example of the internal configuration of the canister 110 as an example. The inside of the canister 110 can be variously changed as needed.

1 through 5, the propelling head 130 includes a propeller 131, a streamlined propeller support 132 for supporting the propeller 131, and an upper propeller support 132 extending upwardly from the propeller support 132, And a cylindrical shroud 135 provided around the propeller 131 for guiding the propulsion water is provided in the vertical support portion 133. The vertical support portion 133 includes a vertical support portion 133 rotatably supported by the bottom plate 111 of the canister 110, can do.

The lower compartment 116 of the canister 110 is provided with a drive shaft 136 for transmitting the rotation of the drive motor 121 to the propeller 131 and a vertical support portion 133 and a propeller support portion 132 Are provided with rotation shafts and gears for connecting the drive shaft 136 and the propeller 131 so as to transmit power. The lower compartment 116 may be provided with a plurality of steering motors 137 for rotating the rotary connection part 134 so as to rotate the propulsion head 130 by 360 degrees.

The propelling head 130 can rotate propeller 131 by the operation of the driving motor 121 in a state where the propelling head 130 is positioned below the bottom surface of the hull 1 as shown in FIGS. In addition, the propulsion head 130 can be rotated by the operation of the steering motors 137 to control the direction of the propulsion water. The propulsion water can move the hull 1 to a desired position so that the hull 1 can maintain its position in the sea despite the influence of algae or waves. The propeller in which the propelling head 130 rotates at the lower portion of the hull 1 is also referred to as an azimuth thruster.

A canister seat 110b may be provided at the lower end of the inner surface of the trunk 2 to allow the canister 110 to be placed thereon. A sealing device 160 to be described later is provided between the canister seat 110b and the canister 110 to form a watertight structure between the canister seat 110b and the canister 110. [

The lifting device 140 for moving the canister 110 up and down may be installed between the outer surface of the canister 110 and the inner surface of the trunk 2, as shown in FIGS. In addition, elevating devices 140 of the same type can be provided on both sides of the canister 110 so that both sides of the canister 110 can be elevated and lowered on an equal condition.

Each lifting and lowering device 140 includes a rack gear 141 fixed to a side surface of the canister 110 and extending in parallel to the lifting direction of the canister 110, two pinion gears 142 and an elevation driving portion 143 for driving these pinion gears 142.

1 to 5, the rack gear 141 is elongated in a direction parallel to the up-and-down direction from the upper side to the lower side of the canister 110 and has two pinion gears 142 on both sides in the width direction thereof And the teeth 141b are provided symmetrically. In this embodiment, a pair of pinion gears 142 are provided only on one side of both side teeth 141b of the rack gear 141, and one pinion gear 142 is engaged with the pinion gear 142 . In this embodiment, the body 141a of the rack gear 141 and the teeth 141b on both sides thereof are integrally formed. However, the body 141a and the teeth 141b are separately manufactured, As shown in FIG. Further, since the rack gear 141 is a long and large component for realizing lifting and lowering of the canister 110 which is a huge structure, the rack gear 141 may be configured to be divided into a plurality of elements and then coupled to each other.

1, the lifting drive portion 143 can be installed at a position higher than the middle portion of the trunk 2 and on both sides of the inner surface of the trunk 2 where the lifting drive portion 143 is located, 143 for installation and maintenance of the vehicle. The drive source of the lifting drive portion 143 may include a reduction gear device and a motor for driving the pair of pinion gears 142 so that the pair of pinion gears 142 can implement reduced rotation in the opposite direction, Can be fixed to the structure (4).

The raising and lowering device 140 can move up and down the canister 110 by raising and lowering the rack gear 141 by the operation of the raising and lowering driving part 143, The position can be changed. That is, as shown in FIG. 3, an operation mode in which the propulsion head 130 is positioned below the bottom surface of the hull 1 to perform position control of the hull 1, The propulsion head 130 is moved to the maintenance space 6 at the upper portion of the trunk 2 for the maintenance of the propulsion head 130 as shown in Fig. 5, in a moving mode in which the propulsion head 130 is pulled up into the trunk 2, You can switch to the pull-up maintenance mode.

5, a maintenance space 6 for maintenance of the propulsion head 130 may be provided on the side of the trunk 2 at a height where the propulsion head 130 is located in the maintenance mode. The maintenance space 6 may be large enough to detach and store the components of the propulsion head 130 therein or to allow the operator to access the propulsion head 130 to perform maintenance, Can be located above the water surface.

As shown in FIGS. 1 and 3, when the canister-type thruster 100 corresponds to the operation mode, the canister-type thruster 100 includes a sealing device 160 that forms a watertight structure between the canister seat 110b and the canister 110 can do. The sealing device 160 includes a sealing material 161 made of a material capable of being elastically deformed to form a watertight structure at a side of a lower surface of the canister 110 and a sealing material 161 sealing the sealing material 161 And a fixing member that fixes and supports the light emitting diode (LED) 161. A skirt 110a approaching the canister seat 110b is provided around the lower end of the canister 110. The seal member 161 is fixedly supported by a fixing member on the inner side of the skirt 110a, 110b may be formed in a watertight structure.

3 to 5, the canister type thruster 100 includes a plurality of restraint devices (not shown) capable of restraining the canister 110 without shaking in a state of being switched to an operation mode, a moving mode, 150).

The restraining device 150 includes a latching rod 152 which protrudes horizontally from the outside of the canister 110 to implement latching and a latching rod 152 which is provided at a corresponding position (Not shown). A plurality of latching members 153 may be provided at corresponding positions so as to implement latching of the latching rod 152 in a state in which the canister 110 is moved to the operation mode, the movement mode, or the maintenance mode.

The plurality of engaging members 153 are engaged with the first engaging member 153 having the engaging groove 154a into which the engaging rod 152 is inserted when the thruster 100 is in the operating mode in which the thruster 100 is positioned below the bottom surface of the hull 1, And the thruster 100 is moved to the inside of the trunk 2 in order to reduce the resistance when the hull 1 is operated, And a second latching member 155 on which the latching rod 152 is placed when the maintenance mode is pulled up to a height.

Fig. 6 is a view showing the first engaging member 154 according to the embodiment of the present invention, wherein (a) is a perspective view and (b) is a sectional view. 6, the first engaging member 154 may be provided with an oblique surface such that the lower surface of the first engaging member 154 is opened and the upper end of the engaging groove 154a is inclined downward toward the inner surface of the trunk 2. [ That is, the cross-sectional shape of the latching groove 154a is formed to be triangular, and the central axis of the latching groove 154a may be directed toward the lower side of the hull 1 as it approaches the inner surface of the trunk 2. [

6C is a perspective view showing a state in which the support rib 156 is provided at the upper end of the first latching member 154. The upper end of the latching groove 154a is inclined downward toward the inner surface of the trunk 2. [ The first engaging member 154 receives a large stress toward the upper side of the hull 1 as the length of the engaging rod 152 entering the engaging groove 154a increases. A supporting rib 156 may be provided between the upper end surface of the first engaging member 154 and the inner surface of the trunk 2 to secure the supporting force of the first engaging member 154 under such stress.

7 is a view showing a latching rod 152 projecting horizontally from the outside of the canister 110. Fig. 7A is a perspective view and Fig. 7B is a cross-sectional view. 7, as the upper end of the engagement rod 152 approaches the outer surface of the canister 110 corresponding to the shape of the engagement groove 154a of the first engagement member 154, As shown in FIG. In other words, the upper end of the latching rod 152 is inclined downward toward the inner surface of the trunk 2. As the length of the latching rod 152 into the latching groove 154a becomes longer, the latching rod 152 The installed canister 110 receives a strong force in the downward direction of the hull 1 and the trunk 2 provided with the first latching member 154 receives strong force in the upper direction of the hull 1, 110) can be stably restrained in the trunk (2). The canister 110 may include a drive unit 151 including a motor or a hydraulic cylinder for generating a power in which the engagement rod 152 protrudes to the outside of the canister 110. [

6 and 7, the first engaging member 154 is provided with its lower surface opened so that when the engaging rod 152 enters the engaging groove 154a of the first engaging member 154, The upper and lower sides of the latching groove 154a are restrained in contact with the latching rod 152 so that the canister 110 can be prevented from vibrating and rotating in the trunk 2 as well as in the vertical direction as well as in the horizontal direction. In other words, the movement of the latching rod 152 is restricted by the upper surface of the latching groove 154a, thereby preventing the vertical movement of the canister 110. At the same time, the latching rod 152 is in contact with both sides of the latching groove 154a It is possible to prevent the horizontal direction vibration and rotation of the canister 110 by restricting the movement.

8 (a) is a perspective view showing a second latching member 155 in which the latching rod 152 enters, in which the canister 110 corresponds to the moving mode or the maintenance mode, and FIG. 8 (b) (152) is placed on the second latching member (155). 8, when the thruster 100 is in a movement mode in which the thruster 100 is drawn into the canister 110 for the navigation of the hull 1, or when the thruster 100 When it is in the maintenance mode, the latching rod 152 can be provided at a corresponding position to enter and engage. The second latching member 155 is formed so as to protrude in the horizontal direction from the inner surface of the trunk 2, and the latching rod 152 may be provided on the upper surface thereof. Accordingly, the upper end surface of the second latching member 155 may be horizontally flat, and the lower end surface of the latching rod 152 may be horizontally flat. The engaging rod 152 is inserted into the engaging groove 154a of the first engaging member 154 in the operating mode but enters the upper end face of the second engaging member 155 in the moving mode, So that the canister 110 can be supported in the trunk 2. A supporting rib 156 may be additionally provided between the lower end surface of the second locking member 155 and the inner surface of the trunk 2 in order to secure the supporting force of the second locking member 155. [ Unlike the structure in which the latching rod is completely inserted into the insertion groove of the inner side of the trunk, the latching rod 152 extends over the second latching member 155 to support the canister 110, The difficulty and time of the operation can be remarkably reduced when the second engaging member 155 is positioned on the inner surface of the trunk, so that the productivity can be improved. The present embodiment is applied to a case where the second engaging member 155 is provided at a height at which the engaging rod 152 protrudes when the second engaging member 155 corresponds to the moving mode and the maintenance mode. A second latching member 155 may be additionally provided on the inner surface of the canister 110 or may be installed only in a moving mode or a maintenance mode to restrain the canister 110. [

(A) to (c) show the degree to which the latching rod is inserted into the latching groove 154a of the first latching member 154, And the degree of squeezing of the sealing material 161 are shown. 9 (a), when the thruster 100 is in the operating mode, the engaging rod 152 is engaged from the outer surface of the canister 110 to restrain the canister 110 in the trunk 2, And starts to enter the engagement groove 154a of the member 154. [ At the same time, the sealing material 161 on the bottom surface of the canister 110 starts to come into contact with the canister seat 110b while being in contact with the canister seat 110b.

9 (b), when the adhesion of the sealing material 161 is insufficient to form a watertight structure or when the sealing material 161 is partially worn by repeated use, It is possible to further increase the length of the latching rod 152 inserted into the latching groove 154a of the first latching member 154. [ Since the upper end surface of the engaging groove 154a and the upper end surface of the engaging rod 152 that is in contact with the upper end surface of the engaging groove 154 are provided with an oblique surface inclining downward toward the inner surface of the trunk 2, the length of the engaging rod 152 inserted into the engaging groove 154a The canister 110 receives a force toward the underside of the hull 1. As a result, the gap between the canister 110 and the canister seat 110b gradually becomes narrow, and the sealant 161 is further compressed and contacts the canister seat 110b, thereby increasing the adhesion. Since the engaging groove 154a of the first engaging member 154 is opened only on the lower surface, the canister 110 can be stably fixed not only in the vertical direction but also in the horizontal direction within the trunk 2. [

9C shows a state in which the engagement rod 152 is completely inserted into the engagement groove 154a of the first engagement member 154 and the state in which the adhesion between the seal member 161 and the canister seat 110b is maximized Respectively.

When a locking pin having a circular sectional shape or the like is inserted into a coupling hole provided on the inner surface of a trunk as in the restraint device of a conventional canister type thruster, the locking pin must be completely inserted into the coupling hole to support the canister in the trunk . However, in such a case, it is possible to prevent the vertical movement of the canister, but the canister is vulnerable to horizontal vibration or rotation. That is, it is vulnerable to the vibration of the canister in the direction parallel to the projecting direction of the locking pin, so that it is troublesome to install the locking pin and the coupling hole on a plurality of surfaces of the canister and the trunk. In addition, the conventional canister-type thrusters are required to precisely match the positions of the locking pins and the engagement holes, and the angles of the lock-pin entry angles and the center axis of the engagement holes must be exactly matched. There is a problem that the efficiency of the work is poor. In addition, since the degree of squeezing of the sealing member provided under the canister can not be controlled, the sealing member is excessively pressed to unnecessarily reduce the durability of the sealing member, or even when the sealing member is partially worn, There is a problem that the sealing member needs to be replaced with a new one, which increases maintenance cost and time. However, in the restraining device of the canister type thruster according to the present embodiment, the engagement groove 154a of the first engagement member 154 into which the engagement rod is inserted is provided with the lower surface thereof being opened, and the second engagement member 155, Since the canister is restrained by the way that the catching rod 152 is stretched, the structure is simplified and the accuracy of the positioning operation is not required in the process of installing the catching member 153, Can be improved.

The first engaging member 154 is provided so that the lower surface thereof is opened so that the engaging groove 154a of the first engaging member 154 and the upper end of the engaging rod 152 are inclined downward as they approach the inner surface of the trunk 2. [ And the movement of the engagement rod 152 is restricted by the engagement of the upper end and both sides of the engagement groove 154a when the engagement rod 152 enters the engagement groove 154a, thereby not only vibrating the canister 110 in the vertical direction, Vibration and rotation can be effectively prevented, so that the canister 110 can be stably restrained in the trunk 2. [

In addition, since the engaging groove 154a of the first engaging member 154 and the upper end face of the engaging rod 152 are inclined downwardly as they approach the inner surface of the trunk 2, The degree of compression of the sealing material 161 provided at the lower portion of the canister 110 can be adjusted according to the length of the sealing material 161 entering the groove 154a. Therefore, the durability of the sealing material 161 can be increased, The watertight structure between the sheets 110b can be stably and efficiently formed.

10 is a perspective view showing a restraining device of a canister type thruster according to another embodiment of the present invention. 10A, the lower surface of the first engaging member 254 is opened and the upper end surface of the engaging groove 254a is inclined downwardly toward the inner surface of the trunk 2, The groove 254a may have a rectangular cross-sectional shape. Since the upper end surface and the side surface of the locking groove 254a are mutually perpendicular to each other, horizontal restraint of the canister 110 can be realized more efficiently when the locking rod 252 is inserted into the locking groove 254a.

10 (b), the latching rod 252 inserted into the latching groove 254a also has a rectangular cross-sectional shape corresponding to the shape of the latching groove 254a, The degree of compression of the sealing member 161 under the canister 110 can be adjusted according to the length of the first engaging member 254 inserted into the engaging groove 254a. The lower end surface of the locking rod 252 may be provided flat.

The remaining configurations other than the configuration shown in FIG. 10 can be substantially the same as those of the above-described embodiment, and therefore, a description thereof will be omitted in order to avoid redundancy.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

2: Trunk 110: Canister
130: propelling head 131: propeller
140: lifting device 141: rack gear
150: constraint device 151:
152, 252: engaging rods 153, 253:
154, 254: first engaging member 154a, 254a:
155: second engaging member 156, 256:
160: sealing device 161: sealing material

Claims (8)

A canister which ascends and descends in a trunk of a hull or a floating structure,
A thruster provided at a lower portion of the canister to ascend and descend with the canister,
And a restraining device for restraining the canister in the trunk,
The restraint device
A latching rod projecting horizontally from the outside of the canister to implement the latching; And
And a plurality of engaging members fixed to the inner surface of the trunk, the engaging members being provided at positions corresponding to the engagement of the engaging rods,
The plurality of engaging members
A first latching member having a latching groove into which the latching rod is inserted when the thruster is positioned below the bottom of the hull;
And a second latching member on which the latching rod is placed while the thruster is drawn into the trunk,
Wherein the first engaging member is provided such that the lower surface thereof is opened and the upper end of the engaging groove is inclined downward toward the inner surface of the trunk,
Wherein the latching rod is inserted in the latching groove of the first latching member so that the upper end of the latching rod is inclined downward toward the inner surface of the trunk corresponding to the shape of the latching groove. The method according to claim 1,
When the latching rod enters the second latching member,
And the lower surface of the engaging rod extends over the upper surface of the second engaging member. 3. The method of claim 2,
Wherein an upper surface of the second engaging member and a lower surface of the engaging rod are horizontally and flatly provided. 3. The method of claim 2,
Wherein a supporting rib is provided between an upper surface of the first engaging member or a lower surface of the second engaging member and an inner surface of the trunk for securing a supporting force. The method according to claim 1,
Further comprising a drive unit including a motor or a hydraulic cylinder that provides power to project the latching rod to the outside of the canister. The method according to claim 1,
Further comprising a sealing device to form a watertight structure between the canister seat and the canister on which the canister rests when the thruster is positioned below the bottom of the hull. The method according to claim 6,
Wherein the sealing device comprises a resiliently deformable sealing material to form a watertight structure,
Wherein the sealing member is protruded from the lower surface of the canister at the inner side of the skirt provided around the lower end of the canister and is provided between the canister seat and the lower surface of the canister, 8. The method of claim 7,
And the degree of squeezing of the sealing material can be adjusted according to the length of the entering rod when the latching rod enters the latching groove of the first latching member.

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