WO2023219201A1

WO2023219201A1 - Movable deck lifting apparatus

Info

Publication number: WO2023219201A1
Application number: PCT/KR2022/008091
Authority: WO
Inventors: Sung Yun JEONG; Jang-Ik Park; Jong Chul Oh; Jong Woo Lim; Dong Hyo JEONG
Original assignee: Daelyun Engineering Co.,Ltd.
Priority date: 2022-05-10
Filing date: 2022-06-08
Publication date: 2023-11-16
Also published as: KR102490969B1; CN117068992A

Abstract

A movable deck lifting apparatus that can simultaneously adjust the heights of several decks in a simple manner is provided. The movable deck lifting apparatus according to the present disclosure includes: a plurality of movable decks; lifting wires; a driving wire; at least one wire driving unit; a moving unit including a moving body, a pair of wedge blocks, a pair of inclined guide, and a fastening unit; and a plurality of sheaves.

Description

MOVABLE DECK LIFTING APPARATUS

The present disclosure relates to a movable deck lifting apparatus and, more particularly, to a movable deck lifting apparatus that can simultaneously adjust the heights of several decks in a simple manner.

Roll-on Roll-off (RORO) vessel is a cargo ship that can transport trucks, trailers, or common vehicles. Such a RORO vessel is characterized in that vehicles can board and leave the vessels using self-power without using a separate crane. That is, a RORO vessel means a ship in which vehicles having a self-moving ability are loaded on carriers such as trucks or trailers and can be loaded on (roll-on) or unloaded from (roll-off) the ship through an inclination plate.

Such a RORO vessel can load and transport vehicles with different sizes and heights including not only passenger cars, but medium-sized and large-sized heavy equipment. In this case, since the vehicle height of passenger cars is smaller than those of medium-sized and large-sized heavy equipment, there is a problem that the volume of a cargo hold is wasted. As a result, there may be a problem that the entire load of cargoes decreases, so transportation efficiency decreases.

Accordingly, a technique of loading vehicles in multi-layers using a separate lift installed in a cargo hold was used to increase volume efficiency for vehicles in the related art. However, since decks are separately adjusted in height by a separate lift, there is a problem that work is inconvenient and takes a lot of time and cost. Further, when a lift is installed for each deck, there is a problem that not only a loss of space is caused by installation of the lifts, but an excessive installation cost is required. A technique for solving these problems has been proposed in Korean Patent No. 10-2316013, but there is a need for structural supplement.

In order to solve these problems, an objective of the present disclosure is to provide a movable deck lifting apparatus and, more particularly, to a movable deck lifting apparatus that can simultaneously adjust the heights of several decks in a simple manner.

The object of the present disclosure is not limited to those described above and other objects may be made apparent to those skilled in the art from the following description.

A movable deck lifting apparatus according to the present disclosure includes: a plurality of movable decks continuously arranged in the same plane and installed to be vertically movable; lifting wires installed in plurality at the movable decks, respectively, hanging and moving up and down the movable decks, and extending upward from the movable decks; a driving wire extending along the movable decks and straightly moving in a first direction that is a longitudinal direction; at least one wire driving unit straightly moving the driving wire in the first direction; a moving unit including a moving body installed at the movable decks, respectively, being able to move in the first direction, and connected with the lifting wires, a pair of wedge blocks installed at each of the moving body and fixing the driving wire to the moving body by pressing both sides of the driving wire, a pair of inclined guide formed at each of the moving body and accommodating the wedge blocks, and a fastening unit coupling or decoupling the wedge block and the driving wire by moving the wedge blocks in the first direction; and a plurality of sheaves guiding the lifting wires to the moving body by turning the lifting wires in parallel with the driving wire.

The wedge blocks may respectively have recessed grooves formed in the first direction on inner sides that are in contact with the driving wire as the driving wire passes through, and may have inclined surface on outer surfaces to be in contact with the inclined guide.

The wedge blocks each may further include a friction layer made of a material having a hardness higher than the driving wire on an inner side of the recessed groove being in contact with the driving wire.

The friction layer may be formed by thermal spray coating using a powder material.

The fastening unit may include a fastening actuator transmitting power by straightly moving and a connection link connecting the fastening actuator and the wedge blocks, and may fit or separate the wedge blocks into or from the inclined guides.

The fastening actuator may include a driving motor generating power, a screw bar connected with the driving motor, a nut block thread-fastened to the screw bar and straightly moving along the screw bar when the screw bar is rotated, and an elastic member disposed between the nut block and the connection link and transmitting elasticity to the wedge blocks.

The connection link may be connected to the nut block such that a gap is defined in a longitudinal direction of the screw bar, and the elastic member may transmit elasticity in a direction in which the wedge blocks are fitted in the inclined guides.

The connection link may be connected at both ends to the wedge blocks and the nut block, respectively, a middle portion between the wedge blocks and the nut block may be coupled to the moving body through a rotary shaft, and the both ends may be rotated about the rotary shaft.

The movable deck lifting apparatus may further include fastening grooves formed by recessing or protruding on surfaces of the wedge blocks, and a fastening block connected with the connection link, inserted in the fastening grooves, and transmitting power to the wedge block.

The fastening grooves may overlap the driving wire and share the pair of wedge blocks and may further include separation inclined surfaces having an opposite inclination to an inclination direction of the inclined guide in a direction in which the wedge blocks are separated from the inclined guides.

The fastening block may be inserted in the fastening grooves to have a gap, a surface in a direction in which the wedge blocks are fitted in the inclined guides may form a perpendicular surface with the driving wire, and a surface in a direction in which the wedge blocks are separated from the inclined guides may form inclined surface corresponding to the separation inclined surfaces.

The fastening unit may be formed for each of the pair of wedge blocks and may independently drive the wedge blocks.

The movable deck lifting apparatus may further include: guide rails installed in parallel with the driving wire at both sides of the driving wire and guiding movement of the moving body; and a fixing unit formed in the moving body and fixing the moving body to the guide rails by protruding toward the guide rails.

According to the present disclosure, it is possible to fix decks at desired heights and install decks in multi-layers, so it is possible to efficiently use a loading space by adjusting the heights of decks and the number of layers in accordance with the height of a vehicle or a cargo.

In particular, since it is possible simultaneously drive several decks using one or two driving devices, there is an advantage that it is possible to very quickly adjust the heights of decks at a low cost. Further, since it is possible to reduce the number of driving devices for driving decks, there is an advantage that it is possible to simplify the configuration of the device, it is advantageous in maintenance, and the entire cost is reduced because the weight of the entire facility can be decreased.

Since there is no need for a specific protruding structure for fixing a deck to a driving wire, decks can be fixed at any position on the driving wire, so it is possible to freely adjust the heights of decks.

FIG. 1 is a view showing a state of a movable deck lifting apparatus according to an embodiment of the present disclosure installed to a vessel.

FIG. 2 is a perspective view of the movable deck lifting apparatus shown in FIG. 1

FIG. 3 is a bottom perspective view showing the internal structure of a moving unit.

FIG. 4 is an exploded perspective view of the moving unit.

FIG. 5 is an operation view showing the internal structure and the operation state of the fastening unit.

FIG. 6 is an operation view showing the fixing unit.

FIGS. 7 to 10 are operation views showing the movable deck lifting apparatus

FIG. 11 is a bottom view of a movable deck lifting apparatus according to another embodiment of the present disclosure.

FIG. 12 is an exploded perspective view of a movable deck lifting apparatus according to another embodiment of the present disclosure.

FIG. 13 is an operation view showing the operation of the movable deck lifting apparatus according to another embodiment of the present disclosure shown in FIG. 12.

The advantages and features of the present disclosure, and methods of achieving them will be clear by referring to the exemplary embodiments that will be described hereafter in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the exemplary embodiments described hereafter and may be implemented in various ways, and the exemplary embodiments are provided to complete the description of the present disclosure and let those skilled in the art completely know the scope of the present disclosure and the present disclosure is defined by claims. Like reference numerals indicate the same components throughout the specification.

Hereafter, a movable deck lifting apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 13.

FIG. 1 is a view showing a state of a movable deck lifting apparatus according to an embodiment of the present disclosure installed to a vessel, FIG. 2 is a perspective view of the movable deck lifting apparatus shown in FIG. 1, FIG. 3 is a bottom perspective view showing the internal structure of a moving unit, and FIG. 4 is an exploded perspective view of the moving unit.

Referring to FIGS. 1 and 2, a movable deck lifting apparatus 1 according to the present disclosure includes: a plurality of movable decks 10 continuously arranged in the same plane and installed to be vertically movable; lifting wires 20 installed in plurality at the movable decks 10, respectively, hanging and moving up and down the movable decks 10, and extending upward from the movable decks 10; a driving wire 30 extending along the movable decks 10 and straightly moving in a first direction that is a longitudinal direction; at least one wire driving unit 40 straightly moving the driving wire 30 in the first direction; a moving unit 100 including a moving body 110 installed at the movable decks 10, respectively, being able to move in the first direction, and connected with the lifting wires 20, a pair of wedge blocks 120 installed at each of the moving body 110 and fixing the driving wire 30 to the moving body 110 by pressing both sides of the driving wire 30, a pair of inclined guide 130 formed at each of the moving body 110 and accommodating the wedge blocks 120, and a fastening unit 200 coupling or decoupling the wedge block 120 and the driving wire 30 by moving the wedge blocks 120 in the first direction; and a plurality of sheaves 50 guiding the lifting wires 20 to the moving body 110 by turning the lifting wires 20 in parallel with the driving wire 30.

The movable deck lifting apparatus 1 according to the present disclosure is an apparatus for dividing a loading space into several layers and may be installed in various spaces such as a vessel for transporting cargoes, warehouses for keeping various cargoes, or a factory.

An embodiment in which the movable deck lifting apparatus 1 is installed in a Roll-on Roll-off (RORO) vessel for transporting vehicles is described herein.

The movable deck lifting apparatus 1 can divide a loading space by moving up and down the movable decks 10 in accordance with the heights of vehicles to be loaded. That is, the movable deck lifting apparatus 1 can adjust the heights of the movable decks 10 so that vehicles to be loaded on a vessel A can be separately loaded on several layers.

The movable deck 10 forms a floor for loading vehicles in a wide plate shape. A plurality of movable decks 10 may be arranged in the same plane to form one layer and is installed in a vessel, thereby forming a floor that supports vehicles.

The movable deck 10 may be formed in a sufficient size that can support a plurality of vehicles, and may be adjusted in height by being moved up and down and then fixed in the vessel A. A plurality of movable decks 10 is disposed in the same plane and can be independently moved up and down. A plurality of movable decks 10 may constitute one large-area deck or may form a plurality of layers by moving up or down some of the movable decks 10 to form different layers.

The movable decks 10 may overlap each other, so several movable decks 10 may be disposed in a vertical space. Accordingly, it is possible to divide a loading space into several layers in the vessel A by adjusting the up-down positions of the movable decks 10.

The movable deck 10 is driven by the lifting wires 20 installed at each corner. The lifting wires 20 hold the movable deck 10 and move up the movable deck 10 using power from the wire driving unit 40. The lifting wires 20 may be metal wires, chains, ropes, etc., and are installed at each corner of the movable deck 10, thereby holding the movable deck 10 while maintaining balance. The lifting wires 20 are extended vertically from the movable deck 10, turned by the sheaves 50, and then connected to the moving unit 100, respectively. Accordingly, the lifting wires 20 are moved with movement of the moving unit 100.

When a plurality of lifting wires 20 is extended from corners of the movable deck 10 and turned by a plurality of sheaves 50, they are all arranged in the same direction and coupled to the moving unit 100. That is, the lifting wires 20 are coupled in parallel to the moving body 110 of the moving unit 100 and are simultaneously operated.

A plurality of sheaves 50 serves to turn the lifting wires 20 vertically extending from the movable deck 10 to be parallel with the driving wire 30 and to guide the lifting wires 20 to the moving body 110. The sheaves 50 may be formed in a circular roller shape to be able to turn the lifting wires 20 and may rotate with movement of the lifting wires 20.

Meanwhile, the moving unit 100 serves to transmit power of the driving wire 30 to a plurality of lifting wires 20 and is selectively coupled to the driving wire 30 while sliding along guide rails 60. The structure of the moving unit 100 will be described in detail below.

The driving wire 30 serves to transmit power for moving up and down the movable deck 10. The driving wire 30 can transmit power generated by the wire driving unit 40 to the movable deck 10 through the moving unit 100. The driving wire 30 straightly moves in two directions, and the direction in which the driving wire 30 straightly moves is referred to as a first direction. The 'first direction' means the movement direction of the driving wire 30 herein, but it may also mean a movement direction of the moving unit 100 that is moved together with the driving wire 30 in the same direction as the movement direction of the driving wire 30. Further, the 'first direction' may mean the longitudinal direction of the driving wire 30 or may mean the longitudinal direction of the guide rails 60.

The driving wire 30 serves to transmit power from the wire driving unit 40 to a plurality of movable decks 10. Accordingly, the driving wire 30 extends along the plurality of movable decks 10. That is, the driving wire 30 may connect the movable decks 10 continuously arranged in the first direction and may connect the movable decks 10 turned by separate sheaves (not shown) and connected in different directions. Since the 'first direction' means the extension direction of the driving wire 30 rather than an absolute direction in this case, a longitudinal direction turned by a sheave may also be considered as the first direction.

The moving units 100 are installed for movable decks 10, respectively, and may be selectively coupled to the driving wire 30. Accordingly, all of movable decks 10 that the driving wire 30 passes may be simultaneously moved up and down, or only some of the movable decks 10 may be selectively moved up and down. The coupling manner of the driving wire 30 and the moving unit 100 makes it possible to independently move up each movable deck 10.

Meanwhile, the driving wire 30 is exemplified as a rope that can transmit only a pulling force for the convenience of description, but is not limited thereto and is a term including a rod-shaped structure that can transmit not only a pulling force but also a pushing force. The driving wire 30 may have any structure as long as it can transmit force in a straight direction and may be used in accordance with the type of the wire driving unit 40.

Meanwhile, the wire driving unit 40 serves to provide power for straightly moving the driving wire 30 and may include various actuators such as a cylinder type actuator that enables straight driving or a winch type actuator that transmits power by winding a wire. That is, the wire driving unit 40 may have any structure as long as it can be coupled to an end of the driving wire 30 and can straightly move the driving wire 30 by pushing or pulling it.

Hereafter, the moving unit 100 is described in detail with reference to FIGS. 3 and 4. The moving unit 100 serves to transmit power from the driving wire 30 to the lifting wires 20 and includes a moving body 110, wedge blocks 120, inclined guides 130, and a fastening unit 200.

The moving body 110 functions as a housing that accommodates the components of the moving unit 100 and slides the components along the guide rails 60. The moving body 110 can slide in the first direction with both ends fitted in the guide rails 60. In this state, a plurality of lifting wires 20 is fixed to the moving body 110 in the first direction. Accordingly, when the moving body 110 is moved in the first direction, the lifting wires 20 can also be horizontally moved in the first direction. Further, the driving wire 30 may pass through the center of the moving body 110 accommodating the wedge blocks 120, the inclined guides 130, and the fastening unit 200 therein.

The moving body 110 is not necessarily limited to a box type housing structure accommodating components therein and may be formed in a block shape on which other components are installed. Further, the moving body 110 may be formed in various shapes, for example, a structure having a pair of vertically spaced plates and accommodating the components of the moving unit 100 in the space between the plates.

The wedge blocks 120 are installed in the moving body 110 and serve to fix the driving wire 30 passing through the moving body 110 to the moving body 110. A pair of wedge blocks 120 is positioned at both sides of the driving wire 30 and can press and fix the driving wire 30 at both sides. The wedge blocks 120, which are wedge-shaped blocks, are formed such that facing surfaces are horizontal and the outer surfaces are inclined. Recessed grooves 121 through which the driving wire 30 can pass are formed on the facing surfaces of the wedge blocks 120, and guide inclined surfaces 122 are formed at an angle on the outer surfaces.

The wedge blocks 120 may be formed in wedge shapes of which the width gradually decreases along the driving wire 30. The outer surfaces of the wedge blocks 120 are inclined and are guided by the inclined guides 130. The inclined guides 130 are formed in rod shapes and symmetrically arranged in a pair such that the width gradually decreases in the direction in which the width of the wedge blocks 120 decreases. The wedge blocks 120 are fitted between the inclined guides 130 and press and fix the driving wire 30 disposed therebetween. When the wedge blocks 120 are separated from the inclined guide 130, the driving wire 30 is also separated from the moving unit 100.

Recessed grooves 121 are formed at the centers facing each other of the wedge blocks 120. The recessed grooves 121 are formed in semicircular shapes, thereby being able to maximize the contact area with the driving wire 30. A friction layer 123 is formed on the inner side of the recessed groove 121. The friction layer 123 prevents the driving wire 30 from sliding between the wedge blocks 120 when the wedge blocks 120 press the driving wire 30. However, the shape of the recessed grooves 121 is not limited to a semicircular groove, and the cross-section may be an angled shape, may be a spiral groove to maximize the friction force, or may be a non-uniform protrusions to form a non-uniform shape. The shape of the recessed groove 121 may be changed in various ways in consideration of the friction force between the inner side and the driving wire 30.

The friction layer 123 is a layer on which small granular protrusions are formed, and can increase friction force with the driving wire 30. In particular, the friction layer 123 may be formed by thermal spray coating. Thermal spray coating is one of surface improvement techniques of improving performance without damaging or deforming a mother material. Thermal spray coating means a technique of changing a powder or wire type thermal spray material into a molten or semi-molten state by injecting the thermal spray material into a thermal spray device that generates high-temperature heat source such as flame or plasma and then of applying or layering the thermal spray material on the surface of a mother material at a high speed, thereby forming a coating layer. That is, the friction layer 123 is a coating layer formed by melting a material powder through a high-temperature heat source and layering the material on the recessed groove 121 of the wedge block 120 at a high speed. It is possible to firmly fix the wedge block 120 to the driving wire 30 by forming protrusions on the contact surface between the friction layer 123 and the driving wire 30. The driving layer 123 may be made of a material having a hardness higher than the driving wire 30, and may be formed by performing thermal spray coating a metal powder made of carbon tool steel, stainless steel, nickel-chrome steel, tungsten, etc. Other than the method of increasing friction force of the friction layer 123 by attaching another substance, friction force may be increased through surface treatment. For example, the friction layer may be formed by making the entire wedge block 12 with a substance having a hardness higher than the driving wire 30 and then roughening the surface, or the friction layer may be formed by making the surface of the recessed groove 121 rough and then increasing the surface hardness through heat treatment, etc.

Meanwhile, the wedge blocks 120 are fitted in or separated from the inclined guides 130 by the fastening unit 200. The fastening unit 200 drives the wedge blocks 120 by applying power to the fastening grooves 124 formed on the wedge blocks 120.

The structures of the wedge blocks and the fastening unit are described in detail with reference to FIG. 5. FIG. 5 is an operation view showing the internal structure and the operation state of the fastening unit. (a) of FIG. 5 shows the state in which the wedge blocks are fixed to the inclined guides through the fastening unit and (b) of FIG. 5 shows the state in which the wedge blocks are separated from the inclined guides through the fastening unit.

The fastening unit 200 serves to couple or decouple the wedge blocks 120 to or from the driving wire 30 by fitting or separating the wedge blocks 120 into or from the inclined guides 130 while moving the wedge blocks 120 in the first direction.

The fastening unit 200 operates the wedge blocks 120 by moving a fastening block 300 that is inserted in fastening grooves 124 formed on the wedge blocks 120 and transmits power. The fastening grooves 124, which are recessed grooves formed on the wedge blocks 120, may be recessed in an angled shape on one surface exposed to the outside of the wedge blocks 120 and may be positioned to overlap the driving wire 30.

The wedge blocks 120 share the fastening grooves 124, and the fastening grooves 124 formed on the respective wedge blocks 120 may be connected to each other. That is, when a pair of wedge blocks 120 are in contact with each other, a pair of recessed grooves 121 are connected to each other, thereby forming one groove. When a pair of wedge blocks 120 are moved away from each other, a pair of recessed grooves 121 can also be moved away from each other. The fastening grooves 124 are formed such that the direction in which the wedge blocks 120 are coupled to the inclined guides 130 is perpendicular to the first direction. Further, the fastening grooves 124 each have a separation inclined surface 124a having inclination opposite to the inclined guide 130 in the separation direction of the wedge block 120 from the inclined guide 130. The separation inclined surface 124a may be inclined in the separation direction thereof so that a pair of wedge blocks 120 are easily separated from the inclined guides 130.

The fastening block 300 has a perpendicular surface 300a formed perpendicular to the fixing direction of the wedge blocks 120 and has inclined surfaces 300b formed in the separation direction of the wedge blocks 120 and having the same inclination as the separation inclined surfaces 124a. The perpendicular surface 300a more firmly fixes the wedge blocks 120 to the inclined guides 130, and the separation inclined surfaces 124a enable the wedge blocks 120 to be easily separated from the inclined guides 130.

The fastening actuator 210 is positioned around the wedge blocks 120 and serves to provide power for reciprocating the wedge blocks 120. The fastening actuator 210 is connected with the wedge blocks 120 through a connection link 220 and can transmit power from the fastening actuator 210 to the wedge blocks 120 through the connection link 220. The fastening actuator 210 includes a driving motor 211 generating power, a shaft-shaped screw bar 212 connected with the driving motor 211 and rotating with rotation of the driving motor 211, a nut block 213 thread-fastened to the screw bar 212 and straightly moving in the longitudinal direction when the screw bar 212 is rotated, and an elastic member 214 coupled to the nut block 213 and providing elasticity to the wedge blocks 120.

The screw bar 212, which has a shaft shape having thread on the outer surface, is horizontally disposed in parallel with the first direction. The screw bar 212 serves to transmit rotation force to the nut block 213 by being rotated at the position by the driving motor 211. The nut block 213 is thread-fastened to the screw bar 212, and can reciprocate in the first direction on the outer surface when the screw bar 212 is rotated. The nut block 213 may be formed in a cylindrical shape having threads on the inner surface and transmits power to the connection link 220 through the elastic member 214. The elastic member 214 is disposed between the nut block 213 and the connection link 220 and keeps transmitting elasticity to the connection link 220 even when the nut block 213 does not transmit power.

The nut block 213 may be recessed at a portion thereof, and the elastic member 214 and the connection link 220 are inserted in the recessed groove of the nut block 213.

First, referring to (a) of FIG. 5, when the driving motor 211 is rotated and the screw bar 212 is correspondingly rotated, the nut block 213 is moved forward toward the wedge blocks 120. In this process, the elastic member 214 contracts and elasticity is transmitted to the fastening block 300 through the connection link 220.

The perpendicular surface 300a of the fastening block 300 pushes forward the fastening grooves 124, so the wedge blocks 120 move in between the inclined guides 130 and press and fix the driving wire 30. The elastic member 214 keeps providing elasticity such that the fastening block 300 presses the fastening grooves 124 even when the driving motor 211 stops driving. Accordingly, the moving unit 100 is coupled to the driving wire 30, so they are moved together.

Next, referring to (b) of FIG. 5, when the driving motor 211 is rotated and the screw bar 212 is correspondingly rotated in the opposite direction, the nut block 213 is moved rearward away from the wedge blocks 120. The nut block 213 directly presses the connection link 220, thereby moving rearward the fastening block 300. In this process, the inclined surfaces 300b of the fastening block 300 press the separation inclined surfaces 124a, whereby the wedge blocks 120 are opened outward while moving rearward. Accordingly, the driving wire 30 is separated from between the wedge blocks 120, and the moving unit 100 and the driving wire 30 are separated and moved.

The inclined surfaces 300b have an inclination the same as those of the separation inclined surfaces 124a and opposite to those of the guide inclined surfaces 122, whereby they can effectively transmit force to the separation inclined surfaces 124a.

Referring to FIG. 6, fixing units 400 are positioned in the moving body 110 and protrude from both sides of the moving unit 110, thereby functioning as stoppers that fix the position of the moving body 110. A pair of fixing units 400 may be positioned on the same line on both sides of the moving body 110 and may protrude outward. The fixing units 400 are inserted in fixing holes 61 of the guide rails 60, thereby being able to fix the moving body 110 in a predetermined section of the guide rails 60. The fixing units 400 may be freely changed into other driving manners and shapes as long as they can fix the moving body 110 in a predetermined section of the guide rails 60.

FIGS. 7 to 10 are operation views of the movable deck lifting apparatus.

In FIGS. 7 to 10, (a) is a view showing movement of the driving wire and the moving unit and (b) is a view showing movement of a driving deck by operation of the driving wire and the moving unit.

Since a first moving unit 100a and a second moving unit 100b that are different are installed, the driving wire 30 can independently move up and down a first movable deck 10a and a second movable deck 10b. Certain points that the driving wire 30 passes through are indicated by P1, P2, P3, and P4 to express movement of the first moving unit 100a and the second moving unit 100b, and two different points on the driving wire 30 are indicated by R1 and R2.

The first moving unit 100a and the second moving unit 100b, and the first movable deck 10a and the second movable deck 10b are separately described for the convenience of description, but they are the same as the moving unit 100 and the movable deck 10 described above, respectively.

First, referring to (a) of FIG. 7, the first moving unit 100a is fixed to the driving wire 30 and the second moving unit 100b is separate from the driving wire 30.

Referring to (b) of FIG. 7, the first moving unit 100a moves up the first movable deck 10a while moving with the driving wire 30 and the second movable deck 10b is fixed at the initial position.

Referring to FIG. 8, the first moving unit 100a and the moving unit 100b are both separate from the driving wire 30. Even if the driving wire 30 is moved right, the first moving unit 100a and the second moving unit 100b are maintained at the positions, and the first movable deck 10a and the second movable deck 10b are also fixed at the positions.

Referring to FIG. 9, the first moving unit 100a is still separate from the driving wire 30, and the second moving unit 100b is fixed to the driving wire 30 and they are moved together.

The first movable deck 10a is maintained in the lifted state and the second movable deck 10b is lifted. As described above, the first movable deck 10a and the second movable deck 10b can be independently operated.

Referring to FIG. 10, the first moving unit 100a and the second moving unit 100b are both fixed to the driving wire 30 and simultaneously moved right, and the first movable deck 10a and the second movable deck 10b can be simultaneously moved down.

The movable deck lifting apparatus according to another embodiment of the present disclosure is substantially the same as the previous embodiment except that fastening units 200-1 are respectively connected to a pair of wedge blocks 120 and drive the wedge blocks 120. Further, the structures of the fastening units 200-1 are also the same as that described above except that connection links 220-1 of the fastening units 200-1 are directly connected to the wedge blocks 120.

The fastening units 200-1 can couple or decouple the driving wire 30 to or from the wedge blocks 120 by simultaneously moving forward or rearward the wedge blocks 120 at both sides. As described in the previous embodiment, elasticity acts when the fastening unit 200 presses the wedge blocks 120, so the wedge blocks 120 can be continuously pressed.

Referring to FIG. 12, a fastening unit 200-2 according to another embodiment of the present disclosure can straightly move a fastening block 300 using a connection link 220' that is rotated on a rotary shaft 223. The fastening unit 200-2, as described above, includes a fastening actuator 210' and a connection link 220'. The fastening actuator 210' is connected with the wedge blocks 120 through the connection link 220' and can transmit power from the fastening actuator 210 to the wedge blocks 120 through the connection link 220'. The fastening actuator 210' includes a driving motor 211' generating power, a shaft-shaped screw bar 212' connected with the driving motor 211' and rotating with rotation of the driving motor 211', a nut block 213' thread-fastened to the screw bar 212' and straightly moving in the longitudinal direction when the screw bar 212' is rotated, and an elastic member 214' coupled to the nut block 213' and providing elasticity to the wedge blocks 120.

The screw bar 212', which has a shaft shape having thread on the outer surface, is horizontally disposed in parallel with the first direction. The screw bar 212' serves to transmit rotation force to the nut block 213' by being rotated at the position by the driving motor 211'. The nut block 213' is thread-fastened to the screw bar 212' and can reciprocate in the first direction on the outer surface of the screw bar 212'. In this case, the nut block 213' may have a dumbbell shape of which both ends of a circular shaft extending in the first direction expand. Accordingly, the nut block 213' reciprocates with rotation of the screw bar 212', and a separate connection member 222 may be coupled to the outer surface of the circular shaft of the nut block 213'. The connection member 222 is slidably coupled to the outer surface of the circular shaft of the nut block 213' and can move with the nut block 213' in the movement direction of the nut block 213'. Further, the connection member 222 may be coupled to the nut block 213' such that a gap is defined between both ends of the nut block 213'. The elastic member 214' having a spring shape is disposed in the section with the gap between the connection member 222 and both ends of the nut block 213', whereby force of the nut block 213' can be transmitted to the connection member 222 through the elastic member 214'. However, the elastic member 214' may be positioned only on the sides at which the fastening actuator 210' presses the wedge blocks 120 to be fitted into the inclined guides 130. Accordingly, the elastic member 214' may be configured to keep applying force using elasticity when the wedge blocks 120 are fitted into the inclined guides 130.

The connection link 220' serves to transmit power from the fastening actuator 210' to the wedge blocks 120. The connection link 220' includes the connection member 222 that is coupled to the circular shaft section of the nut block 213' and slides on the outer surface of the circular shaft, and a rotary shaft 223 fixed at a middle portion between the wedge blocks 120 and the nut block 213'. The elastic member 214' is disposed between both expanding ends of the nut block 213' and the connection member 222 of the connection link 220', so power from the fastening actuator 210' can be transmitted to the connection link 220' by elasticity. A link member 221 is a component connecting the wedge blocks 120 and the nut block 213', and both ends thereof can be rotated on the rotary shaft 223 positioned at the middle portion. When the wedge blocks 120 are moved in one direction, an end of the link member 221 is pressed and the other end is moved in the opposite direction. That is, the wedge blocks 120 can be moved in the opposite direction to the movement direction of the nut block 213'. In particular, the connection link 220' is connected at an end to the fastening block 330 inserted in the wedge blocks 120, so it can press the wedge blocks 120 through the fastening block 300.

The fastening block 300 is inserted in the fastening grooves 123 described above and serves to transmit power from the fastening actuator 210' to the wedge blocks 120. The fastening block 300 has a perpendicular surface 300a formed perpendicular to the fixing direction of the wedge blocks 120 and has inclined surfaces 300b formed in the separation direction of the wedge blocks 120 and having the same inclination as the separation inclined surfaces 124a. Accordingly, when the spaced inclined surfaces 300b of the fastening block 300 press the separation inclined surfaces 124a of the fastening grooves 124, the separation inclined surfaces 124a can come in contact with the inclined surfaces 300b and the fastening grooves 124 can be separated from each other. The inclined surfaces 300b may have an inclination opposite to those of the guide inclined surfaces 122, similar to the separation inclined surfaces 124a.

The fastening unit 200-2 can horizontally move the nut block 213' thread-fastened to the outer surface of the screw bar 212' by rotating the screw bar 212' using the driving motor 211'. The nut block 213' may have a dumbbell shape of which both ends of a circular shaft extending in the first direction expand. The elastic member 214' and the connection link 220' are inserted in the recessed groove of the nut block 213'. The connection link 220' serves to connect the fastening block 300 and the nut block 213'. The connection link 220' may have a shape of which an end is coupled to the fastening block 300, the other end is coupled to the outer surface of the nut block 213', and a predetermined section is curved.

A separate connection member 222 may be coupled to the outer surface of the circular shaft of the nut block 213'. The connection member 222 is slidably coupled to the outer surface of the circular shaft of the nut block 213' and can move with the nut block 213' in the movement direction of the nut block 213'. Further, the connection member 222 may be coupled to the nut block 213' such that a gap is defined between both ends of the nut block 213'. The elastic member 214' having a spring shape is disposed in the section with the gap between the connection member 222 and both ends of the nut block 213', whereby force of the nut block 213' can be transmitted to the connection member 222 through the elastic member 214'. However, the elastic member 214' may be positioned only on the sides at which the fastening actuator 210' presses the wedge blocks 120 to be fitted into the inclined guides 130. Accordingly, the elastic member 214' may be configured to keep applying force using elasticity when the wedge blocks 120 are fitted into the inclined guides 130.

FIG. 13 is an operation view showing the operation of the movable deck lifting apparatus according to another embodiment of the present disclosure shown in FIG. 12. (a) of FIG. 13 shows the state in which the wedge blocks are fixed to the inclined guides through the fastening unit and (b) of FIG. 13 shows the state in which the wedge blocks are separated from the inclined guides through the fastening unit.

Referring to FIG. 13, the fastening unit 200-2 can fix or separate the wedge blocks 120 to or from the inclined guides 13 by reciprocating the fastening actuator 210' in the first direction.

First, referring to (a) of FIG. 13, the fastening actuator 210' can fix the wedge blocks 120 and the driving wire 30 by pressing the wedge blocks 120 in the first direction to the left in (a) of FIG. 13. In this process, the nut block 213' of the fastening actuator 210' can pull the connection member 222 while moving to the right with rotation of the screw bar 212'. That is, when the nut block 213' presses the connection member to the right, the fastening block 300 is rotated to the left on the rotary shaft 223 of the connection link 220', thereby being able to press the wedge blocks 120. In particular, the elastic member 214' is inserted at the left side of the connection member 222 between the nut block 213' and the connection member 222, so the elastic member 214' can press the wedge blocks 120 in the fixing direction using elasticity. Accordingly, it is possible to keep applying force using elasticity when fixing the fastening block 300 to the wedge blocks 120.

Referring to (b) of FIG. 13, the fastening actuator 210' can separate the wedge blocks 120 and the driving wire 30 by pressing the wedge blocks 120 to the right. In this process, the nut block 213' of the fastening actuator 210' can pull the connection member 222 to the left while moving to the left with rotation of the screw bar 212'. That is, when the nut block 213' presses the connection member to the left, the fastening block 300 is rotated to the right on the rotary shaft 223 of the connection link 220', thereby being able to press the wedge blocks 120. In particular, the connection member 222 is pressed to the end of the nut block 213', so the wedge blocks 120 can be separated from the driving wire 30 and the force can be removed. Further, the fastening block 300 can diagonally press the wedge blocks 120 by pressing the separation inclined surfaces 124a of the fastening grooves 124 through the inclined surfaces 300b. That is, the fastening block 300 can be easily separated along the inclined guides 130 in the separation direction of the wedge blocks 120.

Although exemplary embodiments of the present disclosure were described above with reference to the accompanying drawings, those skilled in the art would understand that the present disclosure may be implemented in various ways without changing the necessary features or the spirit of the prevent disclosure. Therefore, the embodiments described above are only examples and should not be construed as being limitative in all respects.

The present disclosure is an apparatus that can be installed in various spaces such as a vessel for transporting cargoes, warehouses for keeping various cargoes, or a factory and can divide a loading space into several layers, so the present disclosure can be widely used in various industrial fields including not only the shipbuilding field, but also the construction field.

Claims

A movable deck lifting apparatus comprising:

a plurality of movable decks continuously arranged in the same plane and installed to be vertically movable;

lifting wires installed in plurality at the movable decks, respectively, hanging and moving up and down the movable decks, and extending upward from the movable decks;

a driving wire extending along the movable decks and straightly moving in a first direction that is a longitudinal direction;

at least one wire driving unit straightly moving the driving wire in the first direction;

a moving unit including a moving body installed at the movable decks, respectively, being able to move in the first direction, and connected with the lifting wires, a pair of wedge blocks installed at each of the moving body and fixing the driving wire to the moving body by pressing both sides of the driving wire, a pair of inclined guide formed at each of the moving body and accommodating the wedge blocks, and a fastening unit coupling or decoupling the wedge block and the driving wire by moving the wedge blocks in the first direction; and

a plurality of sheaves guiding the lifting wires to the moving body by turning the lifting wires in parallel with the driving wire.
The movable deck lifting apparatus of claim 1, wherein the wedge blocks respectively have recessed grooves formed in the first direction on inner sides that are in contact with the driving wire as the driving wire passes through, and have inclined surface on outer surfaces to be in contact with the inclined guide.
The movable deck lifting apparatus of claim 2, wherein the wedge blocks each further includes a friction layer made of a material having a hardness higher than the driving wire on an inner side of the recessed groove being in contact with the driving wire.
The movable deck lifting apparatus of claim 3, wherein the friction layer is formed by thermal spray coating using a powder material.
The movable deck lifting apparatus of claim 1, wherein the fastening unit includes a fastening actuator transmitting power by straightly moving and a connection link connecting the fastening actuator and the wedge blocks, and fits or separates the wedge blocks into or from the inclined guides.
The movable deck lifting apparatus of claim 5, wherein the fastening actuator includes a driving motor generating power, a screw bar connected with the driving motor, a nut block thread-fastened to the screw bar and straightly moving along the screw bar when the screw bar is rotated, and an elastic member disposed between the nut block and the connection link and transmitting elasticity to the wedge blocks.
The movable deck lifting apparatus of claim 6, wherein the connection link is connected to the nut block such that a gap is defined in a longitudinal direction of the screw bar, and

the elastic member transmits elasticity in a direction in which the wedge blocks are fitted in the inclined guides.
The movable deck lifting apparatus of claim 6, wherein the connection link is connected at both ends to the wedge blocks and the nut block, respectively, a middle portion between the wedge blocks and the nut block is coupled to the moving body through a rotary shaft, and the both ends are rotated about the rotary shaft.
The movable deck lifting apparatus of claim 2, further comprising:

fastening grooves formed by recessing or protruding on surfaces of the wedge blocks; and

a fastening block connected with the connection link, inserted in the fastening grooves, and transmitting power to the wedge block.
The movable deck lifting apparatus of claim 9, wherein the fastening grooves overlap the driving wire and share the pair of wedge blocks and further include separation inclined surfaces having an opposite inclination to an inclination direction of the inclined guide in a direction in which the wedge blocks are separated from the inclined guides.
The movable deck lifting apparatus of claim 10, wherein the fastening block is inserted in the fastening grooves to have a gap, a surface in a direction in which the wedge blocks are fitted in the inclined guides forms a perpendicular surface with the driving wire, and surfaces in a direction in which the wedge blocks are separated from the inclined guides form inclined surface corresponding to the separation inclined surfaces.
The movable deck lifting apparatus of claim 9, wherein the fastening unit is formed for each of the pair of wedge blocks and independently drives the wedge blocks.
The movable deck lifting apparatus of claim 1, further comprising:

guide rails installed in parallel with the driving wire at both sides of the driving wire and guiding movement of the moving body; and

a fixing unit formed in the moving body and fixing the moving body to the guide rails by protruding toward the guide rails.