CN107207075B

CN107207075B - Opening and closing device, scaffold, and ship

Info

Publication number: CN107207075B
Application number: CN201580074741.7A
Authority: CN
Inventors: 宫崎智; 安藤聪; 大塚浩友
Original assignee: Mitsubishi Shipbuilding Corp
Current assignee: MITSUBISHI Shipbuilding Corporation
Priority date: 2015-02-27
Filing date: 2015-06-19
Publication date: 2019-12-27
Anticipated expiration: 2035-06-19
Also published as: WO2016135995A1; CN107207075A; JP2016159691A; JP6355053B2; KR101899273B1; KR20170094426A; SG11201705659XA

Abstract

The opening/closing device (24) is an opening/closing device that blocks an opening (25) formed in the middle of the scaffold section (9), and is provided with: a main body (26) that can be displaced between a blocking position at which the opening (25) is blocked from above and an open position at which the opening (25) is opened and is disposed above the blocking position; and a restricting section (30) that, when the main body section (26) is in the open position, intersects the direction in which the user enters the opening section (25) side and extends in the direction along the scaffold section (9) to restrict the user from entering the opening section (25) side.

Description

Opening and closing device, scaffold, and ship

Technical Field

The invention relates to an opening and closing device, a scaffold, and a ship.

This application claims priority based on japanese patent application No. 2015-038252 filed on 27.2.2015, the contents of which are incorporated herein by reference.

Background

There is a ship in which a rectangular parallelepiped cargo box is accommodated in an internal space of a hull in order to transport an object such as an extremely low-temperature liquid. The internal space of the hull of such a ship is divided into a plurality of spaces in the fore-and-aft direction by partition walls, thereby forming a plurality of cargo holds in the fore-and-aft direction. The cargo holds each independently hold a container. That is, a plurality of cargo boxes are arranged in the fore-and-aft direction in the hull.

In the ship, in order to ensure a sufficient volume of the cargo box without increasing the size of the hull, the clearance between the cargo box and the hull and the clearance between the cargo box and the partition wall are formed as small as possible.

In another aspect, the cargo box is provided with insulation on an exterior surface thereof. The insulation material needs to be inspected regularly. Thus, the hull and the partition walls around the cargo box are provided with scaffolding for inspection of the insulation material. The scaffolding is formed to extend in the horizontal direction, and a plurality of scaffolding is provided at intervals in the vertical direction. A ladder for an operator to move up and down is provided between the plurality of scaffolds. For example, a ladder extending upward from a scaffold disposed at the uppermost portion of the partition wall is connected to an entrance/exit such as a manhole (manhole) provided in an upper deck.

The partition wall has a so-called plate rib structure including a plate member and a small rib member. The plate member is formed in a plate shape extending in the ship width direction and the vertical direction. The small bead members protrude toward the side near the stern or the side near the bow (generally, the stern side) in the bow-to-stern direction with respect to the plate members and extend in the up-and-down direction. The small bead member is formed, for example, in a T-shaped cross section. The plurality of small bead members are arranged in the ship width direction and are assembled to the plate member by welding or the like.

Patent document 1 is different from a ship on which the cargo box is mounted. However, patent document 1 describes the following technique: in a bulk cargo ship, a scaffold and a ladder are provided for inspecting a cabin rib which is a structural member of a cabin side wall.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 4632762

Disclosure of Invention

Problems to be solved by the invention

The scaffolding and the ladder are usually provided on both sides of the partition wall near the stern and near the bow.

Scaffolding and ladders provided on the side of the partition wall near the stern and the side of the partition wall near the bow from which the small rib members do not protrude are fixed to the plate members. The scaffold is provided with a notch which is communicated up and down at the position where the scaffold ascends and descends through the ladder.

The scaffold provided on the side from which the small rib member does not protrude may have a rescue route for lifting an operator to an upper deck in an emergency or the like. The rescue route penetrates the cargo hold in the vertical direction through notches respectively provided in the plurality of scaffolds arranged in the vertical direction. These gaps forming the rescue path are often blocked by hinged permanent work tables. The operator can move on the hinged standing table.

On the side of the partition wall adjacent the stern and on the side adjacent the bow from which the small rib members protrude, a ladder is provided in the space between the plate member and the small rib members. The space in which the ladder is provided may also have a platform extending from the scaffold to the plate member side in a continuous manner so as not to fall down when the ladder is changed. Such a platform is sometimes provided to be openable and closable by a hinge or the like in order to secure a rescue route.

When the permanent table and the stage are openable and closable, the user may forget to jam the table after opening the table. Therefore, the operator must always confirm the foot fall so as not to fall from the notch, which increases the burden on the operator during the inspection operation.

The invention aims to provide an opening and closing device, a scaffold and a ship, which can reduce the burden of an operator and the like performing inspection operation.

Technical scheme

According to the first aspect of the present invention, the opening/closing device blocks the opening formed in the middle of the scaffold. The opening/closing device includes: and a main body section that is displaceable between a blocking position at which the opening section is blocked from above and an opening position at which the opening section is opened while being disposed above the blocking position. The opening/closing device further includes: and a restricting portion that, when the main body portion is in the open position, intersects with a direction in which a user enters the opening portion and extends in a direction along the scaffold, and restricts entry of the user into the opening portion.

With this configuration, the user can move safely on the main body when the main body is in the blocking position. On the other hand, when the main body is in the open position, the restricting portion extends in a direction intersecting the direction in which the user enters the opening portion and in the direction of the scaffold. Therefore, for example, when the user tries to enter the opening portion or the like without intention, the restricting portion comes into contact with the user, and therefore the user can be made aware that the main body portion is in the open position. As a result, the burden on the user due to the underfoot check during the inspection work can be reduced.

According to the second aspect of the present invention, the opening/closing device may be such that the regulating portion in the first aspect is provided so as to protrude from the back surface of the main body.

With this configuration, when the main body is displaced from the closed position to the open position, the regulating portion protruding from the rear surface of the main body can be disposed so as to intersect the direction in which the user enters the opening and extend in the direction along the scaffold. As a result, the user can be prevented from entering the opened opening portion with a simple configuration.

According to a third aspect of the present invention, the opening/closing device may be at least a part of the regulating portion in the first or second aspect, which is formed by an elastic member.

With this configuration, even if the restricting portion comes into contact with a surrounding structure when the main body is opened or closed, the restricting portion elastically deforms and escapes. Therefore, the body can be smoothly opened and closed while preventing damage to the surrounding structure.

According to a fourth aspect of the present invention, the opening/closing device of any one of the first to third aspects may be configured such that the regulating portions are provided on both sides in the direction in which the scaffold extends, with the opening interposed therebetween.

With this configuration, when the scaffold is extended to both sides of the opening, the user can be restricted from entering the opening by the restricting portion regardless of the direction in which the user intends to enter the opening.

According to a fifth aspect of the present invention, a scaffold includes an opening, and includes the opening/closing device according to any one of the first to fourth aspects capable of opening and closing the opening.

With this configuration, the opening can be closed, and thus the user can move safely. On the other hand, if the opening is opened, it is possible to easily form a rescue path or the like for vertically penetrating the scaffold while suppressing the entry of the user into the opening.

According to a sixth aspect of the present invention, a ship includes: a hull having a cargo compartment formed therein; a partition wall dividing the cargo hold in a fore-and-aft direction; the scaffolding of the fifth aspect is supported at least by the partition wall.

With this configuration, when inspecting a storage structure such as a cargo box stored in the cargo compartment from the outside, it is not necessary to constantly check the underfooting while moving on the scaffold. Therefore, the burden on the user due to the underfoot confirmation can be reduced.

Advantageous effects

According to the opening and closing device, the scaffold and the ship, the burden of a user who performs inspection work can be reduced.

Drawings

Fig. 1 is a diagram showing a schematic configuration of a ship according to an embodiment of the present invention.

Fig. 2 is a sectional view of the partition wall taken along line II-II of fig. 1.

Fig. 3 is a view of the partition wall according to the embodiment of the present invention as viewed from the bow side.

Fig. 4 is a view of the partition wall of the embodiment of the present invention as viewed from the stern side.

Fig. 5 is a perspective view of the partition wall according to the embodiment of the present invention as viewed from the bow side.

Fig. 6 is a perspective view of the partition wall of the embodiment of the present invention viewed from the stern side.

Fig. 7 is a plan view of the movable table according to the embodiment of the present invention.

Fig. 8 is a side view of the movable table according to the embodiment of the present invention.

Fig. 9 is a perspective view showing a state where a rescue route according to the embodiment of the present invention is formed.

Fig. 10 is a side view of a first stage of a first modification of the embodiment of the present invention.

Fig. 11 is a perspective view of a first scaffold part of a second modified example of the embodiment of the present invention.

Detailed Description

Next, an opening/closing device, a scaffold, and a ship according to an embodiment of the present invention will be described with reference to the drawings.

The ship 1 of the present embodiment is an LPG carrier ship for transporting LPG (liquefied petroleum gas). In order to transport more LPG, the ship 1 can store LPG in the cargo tank 3 in a state where the LPG is cooled and liquefied and reduced in volume. The cargo box 3 is provided with an insulating material on its outer surface.

As shown in fig. 1, a ship body 2 of a ship 1 includes a plurality of cargo holds 4 therein. These cargo holds 4 are spaces for accommodating the cargo boxes 3. A plurality of these cargo tanks 4 are provided in a row in the fore-and-aft direction of the ship. The cargo holds 4 adjacent in the fore-and-aft direction are divided from each other in the fore-and-aft direction by partition walls 6. The cargo tank 4 of the present embodiment is formed below the upper deck 5 of the hull 2. In fig. 1, the fore and aft directions of the hull 2 are indicated by arrows, "F" indicates the fore direction, and "a" indicates the aft direction.

As shown in fig. 2, the partition wall 6 includes: wall portion 7, support portion 8, scaffold portion 9, and ladder portion 10.

The wall portion 7 includes a first wall portion 7A and a second wall portion 7B.

The first wall portion 7A is formed in a plate shape extending in the ship width direction and the vertical direction.

The second wall portion 7B is formed in a plate shape parallel to the first wall portion 7A. The second wall portion 7B is formed at a position different from the first wall portion 7A in the ship width direction. The second wall portion 7B of the present embodiment is formed between two first wall portions 7A arranged in the ship width direction, and is positioned on the stern side of the first wall portions 7A. The distance between the first wall portion 7A and the second wall portion 7B in the fore-and-aft direction in the present embodiment is set to be equal to the length of each of the first support portion 8A and the second support portion 8B in the fore-and-aft direction, which will be described later.

The support portion 8 is a so-called small rib condition for ensuring the rigidity of the partition wall 6. The support portion 8 includes a first support portion 8A and a second support portion 8B.

Fig. 3 is a view of the partition wall according to the embodiment of the present invention as viewed from the bow side. Fig. 4 is a view of the partition wall of the embodiment of the present invention as viewed from the stern side.

As shown in fig. 2 and 3, the first support portions 8A protrude from the wall surface 11 of the first wall portion 7A facing the stern side, and are provided in plurality at intervals in the ship width direction. These first supporting portions 8A are formed to extend in the vertical direction along the wall surface 11. The first support section 8A includes a body section 13A extending in the fore-aft direction and a tip section 14A extending in the width direction, and is formed in a T-shape in cross section. The base portions of the body portions 13A of the first support portions 8A are fixed to the wall surface 11 by welding or the like.

As shown in fig. 2 and 4, the second support portions 8B protrude from the wall surface 12 of the second wall portion 7B facing the bow side, and are provided in plurality at intervals in the ship width direction. These second support portions 8B are formed to extend in the vertical direction along the wall surface 12. The second support portion 8B includes a body portion 13B extending in the fore-aft direction and a tip portion 14B extending in the width direction of the ship, and is formed in a T-shape in cross section. The base portions of the main body portions 13B of the second support portions 8B are fixed to the wall surface 12 by welding or the like. In fig. 3 and 4, the scaffold part 9 is not shown for convenience of illustration.

In the present embodiment, the second wall portion 7B is connected to the first wall portion 7A via the support portion 8. In the present embodiment, the two second support portions 8B, the number of which is sufficiently smaller than that of the first support portions 8A, are provided at intervals in the ship width direction. The first support portion 8A and the second support portion 8B of the present embodiment are formed in a part of the partition wall 6 in the vertical direction, more specifically, in a part other than the lower part of the partition wall 6.

As shown in fig. 3, the wall portion 7C is formed so as to be continuous with the second wall portion 7B and to be wound around the first support portion 8A up and down. The wall surface 16a of the wall portion 7C facing the stern side is flush with the face 17 of the tip portion 14A of the first support portion 8A facing the stern side both above and below the first support portion 8A. The wall portion 7C has a concave arc portion 18 between the first support portions 8A adjacent to each other in the ship width direction. By these arcuate portions 18, long holes extending in the vertical direction are formed between the tip end portions 14A of the first support portions 8A adjacent in the ship width direction.

As shown in fig. 4, wall portion 7D is formed so as to be continuous with first wall portion 7A and to be wound around the upper and lower portions of second support portion 8B, similarly to wall portion 7C. The bow-side wall surface 15a of the wall portion 7D is flush with the bow-side surface 19 of the tip end portion 14B of the second support portion 8B both above and below the second support portion 8B. Similarly to the wall portion 7C, the wall portion 7D has a concave arc portion 20 between the second support portions 8B adjacent to each other in the ship width direction. By these arc portions 20, long holes extending in the vertical direction are also formed between the tip end portions 14B of the second support portions 8B adjacent in the ship width direction.

Fig. 5 is a perspective view of the partition wall according to the embodiment of the present invention as viewed from the bow side. Fig. 6 is a perspective view of the partition wall of the embodiment of the present invention viewed from the stern side.

The scaffold part 9 is constituted by: when performing maintenance such as inspection of the heat insulating material of the cargo box 3, an operator (user) can move the cargo box mainly in a horizontal direction by walking. The scaffold part 9 includes a first scaffold part 9A and a second scaffold part 9B.

As shown in fig. 2 and 5, the first scaffold portion 9A is supported by the wall surface 15 of the first wall portion 7A facing the bow side and the second support portion 8B. The first scaffold part 9A is formed in a plate shape that is long in the ship width direction, and is provided so as to horizontally protrude from the first wall part 7A toward the bow side. The first scaffold parts 9A are provided in plurality at predetermined intervals in the vertical direction, that is, the height direction of the cargo compartment 4.

As shown in fig. 2 and 6, the second scaffold part 9B is provided symmetrically to the first scaffold part 9A in the fore-and-aft direction. The second scaffolding portion 9B is supported by a wall surface 16 (see fig. 2) of the second wall portion 7B facing the stern side and the first support portion 8A. The second scaffold part 9B is formed in a plate shape elongated in the ship width direction, similarly to the first scaffold part 9A, and is provided so as to horizontally protrude from the second wall part 7B toward the stern side. The second scaffold portions 9B are provided in plurality at intervals in the vertical direction, that is, the height direction of the cargo compartment 4.

The first and second scaffold parts 9A and 9B are configured to allow the operator to walk and move, and have a width W1 (e.g., about 400 mm) set so that the dimension in the fore-aft direction is as small as possible. The first and second scaffold portions 9A and 9B ensure a slight gap (for example, about 200 mm) between the horizontal direction and the cargo box 3 in the cargo compartment 4 provided therein.

The cargo tank 4 includes side scaffold portions (not shown). The side scaffold portions are fixed to inner surfaces (not shown) of both side walls of the hull 2 connecting the partition walls 6 adjacent in the fore-and-aft direction. In one cargo tank 4, the side scaffold portions are formed in a plate shape continuous with the first scaffold portion 9A disposed on the stern side and the second scaffold portion 9B disposed on the bow side. The side scaffold parts are provided in plurality at intervals in the vertical direction, and are connected to the first scaffold part 9A and the second scaffold part 9B arranged at the same height. That is, the operator can move around the periphery of the cargo box 3 by moving on the first scaffold part 9A, the side scaffold part, and the second scaffold part 9B, which are arranged at the same height.

As shown in fig. 2, 5, and 6, the ladder section 10 includes a first ladder section 10A and a second ladder section 10B.

As shown in fig. 5, the first ladder portion 10A is disposed in plurality between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side, and extends in the vertical direction. The first ladder portion 10A of the present embodiment is provided so as to straddle between the first scaffold portions 9A adjacent to each other in the vertical direction, so that the operator can move between the first scaffold portions 9A adjacent to each other in the vertical direction. Between the first scaffold part 9A and the wall surface 12 of the second wall part 7B facing the bow side, the first ladder parts 10A are fixed to the body part 13B of the second support part 8B and the body part 13A of the first support part 8A adjacent to the second support part 8B in the ship width direction, respectively.

The first ladder portions 10A adjacent to each other in the vertical direction are disposed at different positions in the ship width direction in which the first scaffold portion 9A extends. The plurality of first ladder portions 10A of the present embodiment are provided as follows: the first ladder portions 10A arranged next to each other in the vertical direction are located at the same positions in the width direction of the ship where the first scaffold portions 9A extend. Among the plurality of first ladder portions 10A of the present embodiment, the first ladder portion 10A disposed uppermost is connected to an opening (not shown) formed in the upper deck 5, and an operator can move from below the first ladder portion 10A to above the first scaffold portion 9A disposed uppermost via the opening from the upper deck 5.

As shown in fig. 6, the second ladder portion 10B is disposed in plurality between the second scaffold portion 9BA and the bow-side wall surface 11 of the first wall portion 7A, and extends in the vertical direction. Similarly to the second ladder section 10A, the second ladder section 10B of the present embodiment is provided so as to straddle between the vertically adjacent second scaffold sections 9B so that the operator can move between the vertically adjacent second scaffold sections 9B. These second ladder portions 10B are fixed to the body portion 13A of the first support portion 8A between the second scaffold portion 9B and the wall surface 11 of the first wall portion 7A facing the stern side.

Similarly to the first ladder portion 10A, the second ladder portions 10B adjacent in the up-down direction are disposed at different positions in the ship width direction in which the second scaffold portions 9B extend. The plurality of second ladder portions 10B of the present embodiment are provided as follows: the second ladder portions 10B arranged next to each other in the vertical direction are located at the same positions in the width direction of the ship to which the second scaffold portions 9B extend. In the plurality of second ladder portions 10B of the present embodiment, the second ladder portion 10B disposed at the uppermost position is connected to an opening (not shown) formed in the upper deck 5, and the operator can move from the second ladder portion 10B to the second scaffold portion 9B disposed at the uppermost position by going down from the upper deck 5 through the opening.

The opening formed in the upper deck 5 may be formed separately for the first ladder portion 10A and the second ladder portion 10B, or may be shared. Further, in the embodiment, the following case is exemplified: the plurality of first ladder portions 10A are all provided in the same orientation in the ship width direction with respect to the first support portion 8A, and similarly, the plurality of second ladder portions 10B are all provided in the same orientation in the ship width direction with respect to the second support portion 8B. However, the installation directions of the first ladder portion 10A and the second ladder portion 10B are not limited to the above directions.

As shown in fig. 5, first platforms 22 are provided between the first scaffold portion 9A on which the first ladder portion 10A is disposed and the wall surface 12 of the second wall portion 7B facing the bow side. These first platforms 22 are formed in a plate shape so as to be continuous with the first scaffold part 9A. The first platform 22 extends from the first scaffold portion 9A toward the side close to the second wall portion 7B, in other words, toward the side close to the stern. These first platforms 22 vertically block at least a part of a plurality of spaces in which the lower portions of the first ladder portions 10A are respectively arranged, in other words, spaces (openings) defined by two second support portions 8B, second wall portions 7B, and first scaffold portions 9A adjacent to each other in the ship width direction. An operator using the first ladder portion 10A can stand on the first platform 22. This allows the operator to easily move between the first scaffold unit 9A and the first ladder unit 10A.

As shown in fig. 6, second platforms 23 are provided between the second scaffold 9B on which the second ladder portion 10B is disposed and the wall surface 11 of the first wall portion 7A facing the stern side. These second platform portions 23 are formed in a plate shape so as to be continuous with the second scaffold portion 9B. The second platform 23 extends from the second scaffold part 9B toward the side close to the first wall part 7A, in other words, toward the side close to the bow. These second platforms 23 vertically block at least a part of a plurality of spaces in which the lower portions of the second ladder portions 10B are respectively disposed, in other words, spaces defined by two first support portions 8A, first wall portions 7A, and second scaffold portions 9B adjacent to each other in the ship width direction. Similarly to the first platforms 22, operators using the second ladder portions 10B can stand on these second platforms 23. This allows the operator to easily move between the second scaffold unit 9B and the second ladder unit 10B.

Although not shown, an armrest extending in the ship width direction is fixed to the second support portion 8B above the first scaffold portion 9A. The armrest is provided in a range where the first platform 22 is not disposed in the ship width direction. Similarly, although not shown, an armrest extending in the ship width direction is fixed to the first support portion 8A above the second scaffold portion 9B. The handrail is provided in a range where the second platform 23 is not arranged in the ship width direction.

As shown in fig. 2, the first scaffold unit 9A of the present embodiment includes a movable table 24 (opening/closing device). The movable tables 24 are provided on a plurality of first scaffold parts 9A provided at intervals in the vertical direction. The movable tables 24 provided on the plurality of first scaffold parts 9A are respectively disposed at the same position in the ship width direction, in other words, at positions overlapping in the vertical direction.

Fig. 7 is a plan view of the movable table according to the embodiment of the present invention. Fig. 8 is a side view of the movable table according to the embodiment of the present invention.

As shown in fig. 7, the movable table 24 is provided in a cutout portion (opening portion) 25 formed in the first scaffold portion 9A. The movable table 24 includes a table main body 26, a base 27, and a handle 28.

The table main body portion 26 is formed in a rectangular flat plate shape that can block the notch portion 25 formed in the first scaffold portion 9A. A side portion 26a of the table main body portion 26 on the side close to the first wall portion 7A is attached to the base portion 27 via a hinge portion 29. The table main body portion 26 can be opened and closed between an open position for opening the cutout portion 25 and a close position for closing the cutout portion 25 by the hinge portion 29.

The base portion 27 supports the table main body portion 26 from below. The base portion 27 extends from the first wall portion 7A in the bow direction along the edge portion 25a of the notch portion 25 in the width direction. The base portion 27 of the present embodiment is disposed so as to straddle the side portion 26b in the ship width direction of the table main body portion 26 at the block position and the edge portion 25a of the cutout portion 25 facing the side portion 26 b. The base portion 27 supports the table main body portion 26 around the side portion 26b and the first scaffold portion 9A around the edge portion 25a from below. The end portion 27a of the base portion 27 of the present embodiment on the side closer to the bow is disposed on the stern side of the end edge 9A of the first scaffold portion 9A on the side closer to the bow.

The handle portion 28 is a portion to be gripped by an operator when the table main body portion 26 is swung from the closed position to the open position and from the open position to the closed position. The handle portion 28 of the present embodiment is fixed to the table main body portion 26, and projects in the bow direction from a side portion 26c of the table main body portion 26 on the side closer to the bow. More specifically, the handle portions 28 are attached to both sides of the one table main body portion 26 in the width direction of the ship, to which the first scaffold portion 9A extends. The handle portion 28 of the present embodiment is formed in a U-shape. The U-shaped end of the handle 28 is fixed to the table main body 26.

The movable table 24 further includes a restricting portion 30 that restricts an operator from entering the cutout portion 25. The restricting unit 30 of the present embodiment includes a restricting rod 31. When the table main body portion 26 is in the open position, the regulating rod portion 31 extends in a direction intersecting the direction in which the operator enters the cutout portion 25, and extends in the bow direction along the first scaffold portion 9A. In the present embodiment, the direction in which the operator enters the cutout portion 25 refers to the direction (the ship width direction) in which the first scaffold portion 9A, which the operator mainly moves, extends. In order to promote the attention of the operator, the outer surface of the regulating rod portion 31 may be formed in a yellow or black stripe pattern.

The stopper rod portion 31 of the present embodiment is formed in a columnar shape and is attached to the back surface 32 of the table main body portion 26 (see fig. 8). More specifically, the base 31a of the regulating rod 31 is fixed to the rear surface 32 of the table main body 26 in the vicinity of two corner portions 26d formed by the side portions 26b and 26 c. That is, the two regulating rod portions 31 are provided so as to sandwich the notch portion 25 from both sides in the direction in which the scaffold portion 9 extends. These regulating rod portions 31 extend in a direction substantially perpendicular to the back surface 32 of the table main body portion 26. By opening and closing the movable table 24, the end 31b of the regulating rod 31 passes through an arc indicated by a two-dot chain line in fig. 8 with the hinge 29 as the center. The lengths of these restricting bar portions 31 are set as: the arc of the chain double-dashed line, which is the locus of the end 31b, does not contact the outer surface of the cargo box 3.

The material of the regulating rod portion 31 can be metal, resin, or the like. An elastic member such as rubber that is easily elastically deformed may be provided on the end 31b side of the stopper rod 31. In the case where the restricting bar portion 31 is provided with an elastic member as such, it is advantageous in the following respects: even if the length of the stopper rod 31 is set to a length that will contact the cargo box 3, damage to the outer surface of the cargo box 3 can be suppressed. The most part of the base 31a other than the stopper bar 31 or the whole including the base 31a may be formed of an elastic member. With this configuration, breakage of the stopper rod portion 31 can be reduced.

Therefore, according to the embodiment, the operator can move safely on the table main body portion 26 with the table main body portion 26 in the blocking position. On the other hand, when the table main body portion 26 is in the open position, the regulating portion 30 extends in the direction crossing the direction of entering the notch portion 25 side and in the direction of the first scaffold portion 9A. Therefore, for example, when the operator tries to enter the cutout portion 25 unintentionally, the restricting portion 30 comes into contact with the operator, and the operator can be made aware that the table main body portion 26 is in the open position. As a result, the burden on the operator due to the underfoot check during the inspection work can be reduced.

Further, by projecting the regulating rod portion 31 from the back surface 32 of the table main body portion 26, the regulating rod portion 31 projecting from the back surface 32 of the table main body portion 26 can be arranged such that only by displacing the table main body portion 26 from the blocking position to the open position: intersects with the direction in which the operator enters the cutout portion 25 and extends in the direction along the first scaffold portion 9A. As a result, the operator can be prevented from entering the cutout portion 25 when the cutout portion 25 is opened with a simple configuration.

When the table main body 26 is in the closed position, the stopper rod 31 is disposed below the scaffold 9, and therefore the movement of the operator is not hindered by the stopper 30.

Further, since the elastic member is provided on the end 31b side of the stopper rod portion 31, the stopper rod portion 31 elastically deforms and escapes even when the stopper rod portion 31 comes into contact with a surrounding structure when the table main body portion 26 is opened and closed. Therefore, damage to the surrounding structure can be suppressed, and the opening and closing operation of the table main body 26 can be smoothly performed.

Further, since the regulating rod portions 31 are fixed to the vicinities of the two corner portions 26d formed by the side portions 26b and 26c of the table main body portion 26, the entry of the operator can be regulated by the regulating rod portions 31 regardless of the direction in which the operator attempts to enter the cutout portion 25 side from the direction in which the first scaffold portion 9A extends.

According to the scaffold part 9 of the above embodiment, the movable table 24 blocks the notch part 25, so that the operator can move safely. On the other hand, as shown in fig. 9, if the cutout portion 25 is opened, the operator can be prevented from entering the cutout portion 25 side, and a rescue path through which the scaffold portion 9 passes vertically can be easily formed.

According to the ship of the above embodiment, when inspecting the storage structure such as the cargo tank 3 stored in the cargo tank 4 from the outside, the operator does not need to constantly check the underfoot while moving on the scaffold unit 9. Therefore, the burden on the operator due to the underfoot confirmation can be reduced.

(first modified example of embodiment)

Next, an opening/closing device, a scaffold, and a ship according to a first modified example of the embodiment of the present invention will be described with reference to the drawings. The first modified example of the present embodiment is different from the above-described embodiment only in the arrangement of the restricting portion. Therefore, the same portions as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted with reference to fig. 5 and 6.

As shown in fig. 5, of the plurality of first platforms 22, the first platforms 22 disposed at predetermined positions in the ship width direction are each provided to be swingable upward via a hinge or the like. That is, by swinging all of the first platforms 22 upward and opening them, a rescue path penetrating in the vertical direction can be formed between the second support portions 8B. Although not shown, the rescue route passes from the inside of the partition wall 6 to the bottom of the cargo hold 4. By this rescue route, for example, an operator or the like having a poor body condition in the cargo hold 4 can be quickly pulled up from the bottom of the cargo hold 4 to the upper deck 5 using a rope or the like.

As shown in fig. 6, of the plurality of second platforms 23, the second platforms 23 disposed at predetermined positions in the ship width direction are each provided to be swingable upward via a hinge or the like, similarly to the first platform 22. That is, by swinging all of the swingable first platforms 23 upward and opening them, a rescue path penetrating in the vertical direction can be formed between the first supporting portions 8A. Here, since the first stage 22 and the second stage 23 are only arranged differently, the first stage 22 will be described in the following description, and the description of the second stage 23 will be omitted.

As shown in fig. 10, the first stage 22 includes: a platform body 126, a base (not shown), and a handle 128.

The platform body portion 126 is formed in a rectangular flat plate shape that can block a space between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side in the horizontal direction. A base portion 126a of the platform main body portion 126 on the side close to the first ladder portion 10A is attached to the base portion via a hinge portion 129. The platform body portion 126 can be opened and closed by the hinge portion 129 between an open position at which the space between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side is opened and a block position at which the space between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side is blocked. The base portion (not shown) supports the platform body portion 126 from below, similarly to the base portion 27 of the movable table 24.

The handle portion 128 is a portion to be held by an operator when the platform main body portion 126 is swung from the block position to the open position and from the open position to the block position. The handle portion 128 of the present embodiment is fixed to the platform main body portion 126. The handle portion 128 protrudes from the end portion 126b of the platform body portion 126 in the ship width direction in which the first scaffold portion 9A extends. The handle portions 128 are respectively fitted in the fore-and-aft direction of the end portion 126b of one platform main body portion 126 at intervals. Like the handle portion 28, the handle portion 128 of the present embodiment is formed in a U-shape. The U-shaped end of the handle portion 128 is fixed to the platform body portion 126.

Like the movable table 24, the first platform 22 includes a restricting portion 130 that restricts an operator from entering a space between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side. The restricting unit 130 includes a restricting rod 131. When the platform main body portion 126 is in the open position, the regulating rod portion 131 extends so as to intersect the fore-and-aft direction, and extends in the ship width direction along the first scaffold portion 9A. In other words, the fore-aft direction can be said to be a direction in which the operator enters a space between the first scaffold 9A and the wall surface 12 of the second wall portion 7B facing the bow side. Similarly to the regulating rod portion 31, the outer surface of the regulating rod portion 131 may be formed in a yellow and black stripe pattern to promote the operator's attention.

The stopper 131 is formed in a cylindrical shape and is attached to the back surface 132 of the platform body 126. These stopper bars 131 extend in a direction substantially perpendicular to the back surface 132 of the platform main body 126. By opening and closing the first platform 22, the end portions 131b of the regulating rod portions 131 pass through an arc indicated by a two-dot chain line in fig. 10 centering on the hinge portion 129. The lengths of the restricting bar portions 131 are set as follows: the arc of the chain double-dashed line, which is the locus of the end portion 131B, does not contact the body portion 13B of the second support portion 8B.

As with the stopper rod 31, the stopper rod 131 may be made of metal, resin, or the like. An elastic member such as rubber that is easily elastically deformed may be provided on the end 131b side of the stopper 131. In the case where the elastic member is provided in the stopper rod portion 131 as described above, even when the stopper rod portion 131 is formed to have a length that contacts the second support portion 8B, the second support portion 8B can be prevented from being damaged. The stopper rod 131 may be formed of an elastic member in most parts other than the base 131a or in the entire body including the base 131 a. In this case, the breakage of the stopper rod 131 can be reduced.

Therefore, according to the first modification of the embodiment, particularly in the case where the platform main body portion 126 is in the blocking position, the operator can safely move to the first ladder portion 10A while standing on the platform main body portion 126.

On the other hand, when the platform main body portion 126 is in the open position, the restricting portion 130 extends in the direction intersecting the direction of entry of the operator and in the direction of the first scaffold portion 9A. Therefore, for example, in a case where an operator inadvertently attempts to enter between the first scaffold portion 9A and the wall surface 12 of the second wall portion 7B facing the bow side at a portion where the armrest is interrupted, the restriction portion 30 comes into contact with the operator, and entry of the operator can be suppressed.

(second modified example of embodiment)

Next, an opening/closing device, a scaffold, and a ship according to a second modified example of the embodiment of the present invention will be described with reference to the drawings. A second modified example of the present embodiment is different from the above-described embodiment only in the support structure of the regulating portion. Therefore, the same portions as those in the above embodiment are given the same reference numerals, and redundant description is omitted.

As shown in fig. 11, the first scaffold part 9A of the second modified example includes a movable table 24 (opening/closing device) as in the above-described embodiment.

The movable table 24 is provided in a notch portion (opening portion) 25 formed in the first scaffold portion 9A. As in the above embodiment, the movable table 24 includes: a table main body 26, a base 27, a handle 28, and a regulating portion 30.

The limiter 30 of the second modification includes: a regulating rod part 31, a support part 33, and an urging part 34.

As in the above-described embodiment, two restricting rod portions 31 are provided in the second modified example. Similarly to the above-described embodiment, the regulating rod portion 31 can be disposed at a regulating position that regulates the entry of the operator into the cutout portion 25 side when the table main body portion 26 is at the open position. The regulating rod portion 31 at the regulating position extends so as to intersect the direction in which the operator enters the cutout portion 25, and extends in the bow direction along the first scaffold portion 9A.

The support portion 33 supports the stopper rod portion 31 so as to be vertically swingable between a regulation position (indicated by a solid line in fig. 11) and a retreat position (indicated by a two-dot chain line in fig. 11). The retracted position is a position swung to a position below the limit position. These support portions 33 have swing shafts 33a extending in a direction orthogonal to the entering direction of the operator, i.e., in the ship width direction. These support portions 33 are fixed to the rear surface 32 of the table main body 26. That is, the restricting bar portion 31 is supported by the support portion 33, and is thereby swingable in the up-down direction. On the other hand, the displacement of the support portion 33 in the direction in which the operator enters the notch portion 25 (in other words, the ship width direction) is restricted.

The biasing portion 34 biases the regulating rod portion 31 toward the regulating position from the retracted position to the regulating position. The biasing portion 34 of the present embodiment is mounted so as to straddle between the stopper rod portion 31 and the back surface 32 of the table main body 26. The biasing portion 34 is not limited to the coil spring shown in fig. 11 as long as it is an elastic body that can bias the stopper rod portion 31 toward the restricting position.

By configuring the movable table 24 in this manner, even if the length of the stopper rod portion 31 is set to a length that will contact the cargo box 3 when the movable table 24 is opened, the stopper rod portion 31 can be swung to the retreat position side against the biasing force of the biasing portion 34 to retreat when the movable table 24 is opened. Therefore, damage to the outer surface of the cargo box 3 can be suppressed, and breakage of the stopper rod portion 31 can be reduced. Further, since the stopper rod 31 automatically returns to the restricting position even after the stopper rod 31 is retracted to the retracted position, it is possible to suppress occurrence of a human error such as forgetting to restore, as compared with a case where the stopper rod 31 is manually displaced to the restricting position. Further, since the swing of the restricting rod portion 31 in the direction in which the operator enters the cutout portion 25 is restricted, the operator can be more effectively prevented from entering the cutout portion 25.

The present invention is not limited to the above-described embodiments, and includes embodiments obtained by variously changing the above-described embodiments within a range not departing from the gist of the present invention. That is, the specific shape, configuration, and the like described in the embodiments are merely examples, and can be modified as appropriate.

For example, in the above embodiment, a case where the regulating rod portions 31 and 131 protrude from the rear surfaces 32 and 132 of the table main body portion 26 and the table main body portion 126, respectively, has been described as an example. However, the protruding portions of the restricting rod portions 31 and 131 are not limited to the back surfaces 32 and 132 as long as the operator's entry can be suppressed. For example, it may be: the regulating rod parts 31, 131 are disposed adjacent to the first platform 22, the second platform 23, and the movable table 24, and the regulating rod parts 31, 131 are swung in conjunction with opening and closing of the first platform 22, the second platform 23, and the movable table 24. The displacement of the regulating rod portions 31 and 131 in conjunction with the opening and closing of the first platform 22, the second platform 23, and the movable table 24 is not limited to the swing.

Further, the shape of the regulating rod portions 31 and 131 is not limited to the above embodiment. When the first platform 22, the second platform 23, and the movable table 24 are in the open position, they may extend in the direction along the scaffold portion 9 while intersecting the direction of entry of the operator.

In the above embodiment, a case where the opening/closing device and the scaffold of the present invention are applied to the ship 1 is described. However, the present invention is not limited to this, and may be applied to other than ships, for example.

The vessel 1 of the above embodiment is described by taking an example of an LPG carrier. However, the storage and transportation of the ship 1 in the cargo box 3 is not limited to LPG. Further, the present invention is not limited to low-temperature liquid such as LPG. The invention can also be applied to ships that transport high temperature substances such as asphalt.

Industrial applicability of the invention

The present invention can be applied to an opening/closing device for blocking an opening formed in the middle of a scaffold, a scaffold provided with the opening/closing device, and a ship provided with the scaffold. According to the opening and closing device, the scaffold and the ship, the burden of a user who performs inspection work can be reduced.

Description of the symbols

1 Ship

2 hull of ship

3 container

4 cargo hold

5 Upper armor plate

6 partition wall

7 wall part

7A first wall part

7B second wall part

8 support part

8A first support part

8B second support part

9 scaffold parts (scaffold)

9A first scaffold part

9a end edge

9B second scaffold part

10 ladder part

10A first ladder part

10B second ladder section

11 wall surface

12 wall surface

13A Main body part

13B body part

14A tip end portion

14B tip part

15 wall surface

15a wall surface

16 wall surface

16a wall surface

17 side of

18 arc part

19 noodles

20 arc part

22 first platform (opening and closing device)

23 second platform (opening and closing device)

24 Movable workbench (opening and closing device)

25 notched part (opening)

25a edge part

26 workbench main body part (main body part)

26a side part

26b side part

27 base part

27a end portion

28 handle part

29 hinge part

30 restriction part

31 limiting rod part

31a base part

31b end part

32 back side

33 support part

34 force application part

126 platform body (Main body)

126a base

126b end portion

128 handle part

129 hinge part

130 limiting part

131 limiting rod part

131a base

131b end portion

132 back side

Claims

1. An opening/closing device for closing an opening formed in a middle of a scaffold, comprising:

a main body portion displaceable between a blocking position for blocking the opening portion from above and an opening position which is disposed above the blocking position and opens the opening portion;

a restricting portion that, with the main body portion in an open position, intersects a direction in which a user enters the opening portion and extends in a direction along the scaffold, restricting the user from entering the opening portion,

the regulating portions are provided on both sides of the direction in which the scaffold extends, with the opening interposed therebetween, and extend so as to always protrude in a vertical direction from the back surface of the main body.

2. The opening-closing device according to claim 1,

at least a part of the restricting portion is formed of an elastic member.

3. A scaffold is provided with an opening part,

the opening/closing device according to claim 1 or 2, wherein the opening portion can be opened and closed.

4. A ship is provided with: a hull having a cargo compartment formed therein;

a partition wall dividing the cargo hold in a fore-and-aft direction;

the scaffold of claim 3 supported at least by the divider wall.