JP2020192847A - Embarking disembarking device for vessel - Google Patents

Abstract

To provide an embarking disembarking device for a vessel capable of handling great variation in a shipboard slope by such as rocking of a mooring small vessel without having the shipboard slope be heavy, easily carrying out maintenance by reducing welding positions in comparison to a conventional slope, and with hardly any necessity for welding repair of stainless alloy in maintenance.SOLUTION: A shipboard slope 16 is greatly deformed in a rhombic shape in the moving direction of a small vessel 11 with connection portion with a platform 13 as a base end when the shipboard slope 16 hung across an embarking disembarking deck 14 of the small vessel 11 which is moored is moved in bow to stern direction due to such as waves. As a result, great variation in the shipboard slope 16 due to such as rocking of a small vessel 11 mooring in port is capable of being handled without having the shipboard slope 16 made heavy, maintenance is easily carried out by reducing welding positions compared to the conventional slope, and there is hardly any necessity for welding repair of stainless alloy at maintenance.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ship boarding / alighting device, specifically a ship boarding / alighting device installed on a quay where a small ship, particularly a small passenger ship, is anchored.

In response to the ship's sway and the ship's boarding / alighting deck that is displaced due to the ebb and flow of the tide, the ship-side slope cantilevered on the platform installed on the quay is turned left and right (left and right rotation) and up and down (up and down rotation). Displacement devices are known (Patent Document 1 and the like).
For example, when a small vessel arrives at a remote island, after mooring, the ship-side slope is hung from the platform of the boarding / alighting device for the small vessel to the hull.

Japanese Patent No. 2723444

By the way, the boarding / alighting device for a small ship has a larger amount of sway of the hull at the time of berthing than the device for a large ship as in Patent Document 1, and an excessive external force acts on the slope on the ship side. As a countermeasure, conventionally, the constituent members of the slope on the ship side have been made heavier, and the strength has been set to withstand it. However, this increases the weight of the boarding / alighting device and requires a large force to move the device.
In the bays of remote islands, strong winds and salt damage are severe, and the usage environment of boarding and alighting equipment is severe. Therefore, in consideration of breakdowns, ground workers are used as the means of transportation for boarding and disembarking equipment instead of self-propelled transport vehicles. It is common to use a dolly that is moved by. Moreover, on such remote islands, it is difficult to secure personnel to carry the boarding / alighting equipment, and the current situation is that the work is carried out by a small number of elderly people.
Based on this, there is a need for weight reduction of the boarding / alighting device for ships so that the boarding / alighting device can be easily moved by the trolley. As for this weight reduction, for example, it is conceivable to use an aluminum alloy as the main material of the slope on the ship side.

By the way, the ship boarding / alighting device has been used for a long period of time while performing regular maintenance. However, since this device is installed on the quay, rust and cracks are likely to occur in many welds on the slope on the ship side due to strong winds and salt damage, and it is necessary to re-weld and repair each time. there were.
Moreover, as described above, welding when an aluminum alloy is used as the main material is more difficult than that of mild steel, and most remote islands do not have welders who have acquired such special welding techniques. Therefore, there has been a demand for a ship boarding / alighting device having a ship-side slope that does not require welding repair of an aluminum alloy.

Therefore, as a result of diligent research, the inventor has a pair of left and right girders that can independently rotate in the vertical and horizontal directions as the ship side slope, and a large number of girders that can independently rotate in the vertical and horizontal directions between these girders. It was found that all the above-mentioned problems could be solved by adopting the tread plates laid horizontally in parallel, and the present invention was completed.

That is, the present invention can cope with a large displacement of the ship-side slope due to the sway of a small vessel moored at the port and the ebb and flow of the tide without making the ship-side slope heavy, and is welded as compared with the conventional ship-side slope. It is an object of the present invention to provide a ship boarding / alighting device that can reduce the number of locations and facilitate maintenance, and further requires almost no welding repair of aluminum alloy during maintenance.

The invention according to claim 1 is a platform for boarding and disembarking that is movably installed on a quay where a small vessel is anchored, and a ship side that is connected to the platform and whose tip is hung on the boarding / alighting deck of the small vessel. In a ship boarding / alighting device equipped with a slope, the ship-side slope is horizontally laid in parallel between a pair of left and right girders that can independently rotate in the vertical and horizontal directions and the pair of left and right girders. This is a ship boarding / alighting device each having a plurality of tread plates arranged so as to be independently rotatable in the vertical direction and the horizontal direction.

A ship boarding / alighting device is a facility used for passengers getting on and off a small ship from the bay. The passengers referred to here include not only those who board the ship but also those who get off the ship (disembarkation).
The type of ship boarding / alighting device is arbitrary.
As the small vessel, for example, various passenger ships, various cargo ships, and the like can be adopted.
A platform is a landing for passengers to board and disembark.
A ship-side slope is a cantilevered corridor with a flat passage surface that is hung between the platform and the boarding / alighting deck and allows passengers, including healthy people and wheelchair users, to pass when boarding or disembarking. Is.

The platform may be installed on the quay and provided with means for passengers to get on and off the platform. In this case, the type of boarding / alighting means is not limited. For example, a land slope or a staircase ramp may be used. Further, in addition to this, an elevator and an elevating device such as an elevating lifter used by a wheelchair user or the like may be provided. The elevating device is a device for elevating and elevating a lifting cage on which a wheelchair or the like is placed by means of raising and lowering the cage between the ground plane of the quay and the platform. By providing an elevating device, it can be a barrier-free ship boarding / alighting device.
It is preferable that the boarding / alighting device for ships is provided with a trolley on which the platform is mounted. The dolly may be a manual type or a self-propelled type.

As a structure that allows the pair of left and right girders to rotate independently in the vertical direction, for example, an elevation hinge having a horizontal axis can be adopted at the base end portion (end portion on the platform side) of each girder. ..
Further, as a structure that allows the pair of left and right girders to rotate independently in the left-right direction, for example, a left-right swivel hinge having a vertical axis at the base end of each girder can be adopted.
The shape of each tread plate is arbitrary. For example, it may have a substantially rectangular shape that is long in the width direction of the slope on the ship side.
The number of treads used is arbitrary as long as it is two or more.

The structure that allows each tread plate to rotate independently in the left-right direction is not limited. For example, both ends of each tread can be rotatably connected to the corresponding girders via vertical pins.
Further, the structure that allows each tread plate to independently rotate (swing) in the front-rear direction is not limited. For example, both ends of each tread may be rotatably connected to the corresponding girders via horizontal pins. In addition, a structure may be used to increase the rattling in connecting the end portion of each tread plate to each vertical pin. In this case, a cushioning material (spring, rubber, etc.) may be attached to each shaft support portion including each vertical pin in order to prevent squeaking noise and wear of the contact member due to rattling.

According to the second aspect of the present invention, the ship-side slope is provided with a roof via four columns arranged at both ends of the pair of left and right girders in the length direction, and the four columns are provided with a roof. The claim is that at least two of them, on the left side or the right side, are roof swing columns having a pair of swing pins extending in the width direction of the ship-side slope at the upper and lower ends thereof, respectively. The ship boarding / alighting device according to 1.

The roof swing column may be two columns arranged on the left side of the slope on the ship side or two columns arranged on the right side thereof. Alternatively, all four may be roof swing columns.
A pair of upper and lower swing pins whose length direction extends in the width direction of the ship-side slope are arranged at the upper end and the lower end of the roof swing support. By arranging these swing pins on each roof swing strut, it is possible to prevent damage such as deformation of the strut due to rotation (turning) of the slope on the ship side in the left-right direction.
The swing width (swing angle) of each roof swing support is arbitrary.

According to the first aspect of the present invention, when the ship-side slope hung on the boarding / alighting deck of a small ship anchored at the quay moves in the stern direction (front-back direction) of the small ship due to the influence of waves or the like. Each girder, which can rotate independently in the vertical and horizontal directions, follows this and rotates laterally. Along with this, both ends of each tread plate that can independently rotate in the vertical and horizontal directions rotate in a predetermined direction, and each tread plate laterally shifts in the moving direction of the small vessel while maintaining the parallel state. As a result, the ship-side slope is greatly deformed into a diamond shape (parallel quadrilateral shape) in the moving direction of this small ship, with the connecting portion with the platform as the base end. Therefore, the followability of the ship side slope in the stern direction is improved as compared with the conventional ship side slope.
In addition, when a small vessel at berth moves in the vertical direction due to the influence of the tide, each girder that can rotate independently in the vertical direction follows this and rotates up and down, and the ship side accordingly. The slope looks down.

As a result, it is possible to cope with a large displacement of the ship-side slope due to the sway of a small vessel moored at the port and the ebb and flow of the tide without making the ship-side slope heavy. In addition, since the rotating structure is adopted for many of the connection points between the main members of the ship-side slope in this way, the number of welded points can be reduced compared to the conventional ship-side slope, and maintenance can be facilitated. Furthermore, during maintenance of this ship-side slope. , Welding repair of aluminum alloy, which requires special welding technology, is almost unnecessary.

In particular, according to the ship boarding / alighting device according to claim 2, the roofs of the slopes on the ship side are four arranged at both ends in each length direction of a pair of left and right girders that can rotate independently in the vertical and horizontal directions. It is erected using the support of. Therefore, if the slope on the ship side rotates in the left-right direction, a twisting moment is generated in each column, which may cause deformation. However, here, when the ship-side slope is rotated in the left-right direction, each roof swing strut swings in the length direction of the ship-side slope around the vertical swing pin, so that each strut is deformed (damaged). ) Can be prevented.

It is a top view which shows the use state of the ship boarding / alighting device which concerns on Example 1 of this invention. It is a side view which shows the use state of the ship boarding / alighting device which concerns on Example 1 of this invention. (A) is a front view showing a ship-side slope constituting a part of the ship boarding / alighting device according to the first embodiment of the present invention. (B) is a front view showing a right-handed turning state of a ship-side slope constituting a part of the ship boarding / alighting device according to the first embodiment of the present invention. It is an enlarged side view of the main part which shows the connection state of the platform which constitutes a part of the ship boarding / alighting device which concerns on Example 1 of this invention, and a ship side slope. FIG. 5 is an enlarged cross-sectional view of a main part showing a connecting structure of a ship-side slope and a roof swing support column which form a part of a ship boarding / alighting device according to a first embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view of a main part showing a connecting structure of a roof swing support column and a tread plate and a girder of a ship side slope constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. (A) is an enlarged front view of a main part showing a connecting structure of a roof and a roof fixing support column which form a part of a ship boarding / alighting device according to a first embodiment of the present invention. (B) is an enlarged front view of a main part showing a connecting structure of a roof and a roof swing support column which form a part of a ship boarding / alighting device according to a first embodiment of the present invention. (A) is an enlarged side view of a main part showing a roof mounting structure constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. (B) is an enlarged side view of a main part showing another mounting structure of a roof constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view of a main part showing a connecting structure of a handrail, a tread plate, and a girder of a ship-side slope constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. (A) is an enlarged plan view of a main part showing a connecting structure of treads of a ship-side slope constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. (B) is an enlarged plan view of a main part showing a connecting structure of treads in a right-turning state of a ship-side slope constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention. It is a top view which shows the right-hand turn state of the ship side slope which constitutes a part of the ship boarding / alighting device which concerns on Example 1 of this invention. It is a side view which shows the right-hand turn state of the ship side slope which constitutes a part of the ship boarding / alighting device which concerns on Example 1 of this invention. FIG. 5 is an enlarged cross-sectional view of a main part showing a connecting structure of a roof swing strut and a tread plate and a girder in a right-turning state of a ship-side slope constituting a part of a ship boarding / alighting device according to a first embodiment of the present invention.

Hereinafter, examples of the present invention will be specifically described with reference to the drawings. Here, a ship boarding / alighting device deployed on a small passenger ship will be taken as an example. However, it is not limited to this. Further, here, for convenience of explanation, the X1 direction is the front direction of the ship side slope (sea direction), the X2 direction is the rear direction of the ship side slope (quay direction), and the Y1 direction is the right direction of the ship side slope (the stern direction of a small ship). ), Y2 direction is the left direction of the ship side slope (the bow direction of a small ship), Z1 direction is the upward direction of the ship side slope, and Z2 direction is the downward direction of the ship side slope.

As shown in FIGS. 1 and 2, the ship boarding / alighting device 10 according to the first embodiment of the present invention is installed on the quay 12 of a remote island where a passenger small ship (hereinafter, small ship) 11 is anchored. It includes a platform 13 for ships and a ship-side slope 16 with a roof 15 connected to the platform 13 and whose tip is hung on the deck 14 of a small vessel 11.
Hereinafter, these components will be specifically described.
As shown in FIGS. 1, 2 and 4, the platform 13 is a thick aluminum alloy plate having a rectangular shape in a plan view and can be moved by being mounted on a push-type trolley (not shown). Of the X1 side ends of the platform 13, connecting members 17 project in the X1 direction at each corner on the Y1-Y2 side. An end portion of a universal joint 18 made of a stainless alloy on the X2 side is freely connected to the protruding portion of each connecting member 17 via a horizontal elevation shaft 19 (up and down rotation) (FIG. 4). ..

Next, the ship-side slope 16 will be described in detail with reference to FIGS. 1 to 10.
As shown in FIGS. 1 to 3, the ship-side slope 16 is horizontally laid in parallel between a pair of left and right girders 20 and 21 that can independently rotate in the vertical and horizontal directions, respectively. It has a plurality of tread plates 22 extending in the Y1-Y2 direction, each of which is arranged so as to be independently rotatable in the vertical direction and the horizontal direction.
As shown in FIGS. 1 to 6, each of the girders 20 and 21 is a square pipe material made of an aluminum alloy that is long in the Y1-Y2 direction. A hooking portion 23 for the boarding / alighting deck 14 is arranged on the lower surface of the end portion (tip portion) of each of the girders 20 and 21 on the X1 side. Further, a pair of thick upper and lower hinge plates 24 made of aluminum alloy are formed on the upper and lower surfaces of the X2 side ends (base end portions) of the girders 20 and 21, and the X2 side ends thereof are outward. They are fixed to each other in a protruding state (Fig. 4).
The X1 side end of the stainless alloy universal joint 18 is inserted between the protruding portions of the hinge plates 24 arranged in pairs. Each pair of hinge plates 24 and the end of the corresponding universal joint 18 on the X1 side are pivotally supported by a pair of left and right swivel shafts 25 extending in the vertical direction.
As a result, the girders 20 and 21 are rotatably connected to the platform 13 in the left-right direction. As a result, the pair of left and right girders 20, 21 are independently rotatable in the vertical and horizontal directions via the elevation shafts 19 and the left and right swivel shafts 25.

Next, the roof 15 of the ship-side slope 16 will be described with reference to FIGS. 1 to 3, 7 and 8.
As shown in FIGS. 1 to 3, the roof 15 has a rectangular arch shape long in the X1-X2 direction, and the frame 26 thereof is a rectangular frame 27 made of a rectangular aluminum alloy tube in a plan view and aluminum. It has seven arch frames 28 made of alloy (FIG. 7). In these, each arch frame 28 is welded to the rectangular frame 27 at a predetermined pitch in the X1-X2 direction. The roof 15 is formed by fixing a roof plate 29 made of transparent plastic or the like to the upper surface of the obtained frame 26.
The roof 15 is supported by the girders 20 and 21 via four columns 30 long in the Z1-Z2 direction arranged at the four corners thereof.

Hereinafter, the connection structure between the support columns 30 and the roof 15 and the connection structure between the support columns 30 and the girders 20 and 21 will be specifically described.
First, the four columns 30 will be described.
As shown in FIGS. 1 to 3, two of the four columns 30 arranged on the Y1 side are roof fixing columns 31 made of round pipes made of long stainless steel pipes. The two pipes arranged on the Y2 side are round pipes made of long stainless steel pipes, and a pair of swing pins 45 and 52 extending in the width direction of the ship side slope 16 are provided at the upper and lower ends of the round pipes. It is a roof swing support column 32.

As shown in FIG. 5, a pair of flanges F are formed on the outer peripheral surface of each of the roof fixing columns 31 near the lower end. Further, as shown in FIGS. 7A and 8A, a stainless alloy member 33 is fixed to the upper end of each roof fixing column 31.
The upper end of each roof fixing column 31 is formed via two portal connecting metal fittings 34 arranged at both ends on the X1-X2 side of the long frame portion 27a on the Y1 side of the rectangular frame 27. Each is rotatably connected.
Each gate-shaped connecting metal fitting 34 is parallel to the fixing sleeve 35 fitted to each long frame portion 27a and the X1-X2 direction in which the base end portions are fixed to both ends in the length direction of the fixing sleeve 35. It has a pair of isolated fixed links 36. The upper end of the roof fixing column 31 with each member 33 was inserted between the lower parts of each fixing link 36, and in this state, these three members 31, 33, 36 were extended in the X1-X2 direction. The first bolt 37 and the nut N are rotatably connected.

Further, as shown in FIG. 3, each roof swing support column 32 is divided into three parts, a lower end support column 38, an upper end support column 39, and a main body support column 40 long in the Z1-Z2 direction.
Next, with reference to FIG. 6, the connection structure of the lower end strut portion 38 and the main body strut portion 40 will be described.
A pair of flanges F are integrally formed on the outer peripheral surface of each lower end strut portion 38 near the upper end portion. Further, a first cap 42 made of an aluminum alloy having a first half-split piece portion 41 in which a half of the upper end portion on the Y1 side is cut out is fixed to the upper end portion of each lower end strut portion 38. ..
On the other hand, a second cap 44 made of an aluminum alloy having a second half-split frame portion 43 in which the Y2 side half of the lower end portion is cut out is fixed to the lower end portion of each main body strut portion 40. .. The corresponding first and second caps 42 and 44 are provided with a second bolt (swing) extending in the Y1-Y2 direction via a flat washer between the first and second half-split pieces 41 and 43 facing each other. The pin) 45 and the nut N are rotatably connected to each other.

Next, the connection structure between the upper end strut portion 39 and the main body strut portion 40 will be described with reference to FIGS. 7 (b) and 8 (b).
A third cap 47 made of an aluminum alloy having a third half-split top portion 46 in which a half of the upper end portion on the Y2 side is cut out is fixed to the upper end portion of each upper end strut portion 39. On the other hand, a fourth cap 49 made of an aluminum alloy having a fourth half-split frame portion 48 in which a half of the upper end portion on the Y1 side is cut out is fixed to the upper end portion of the main body support portion 40. The caps 47 and 49 of the third and fourth caps 47 and 49 are the third bolts (swinging) extending in the Y1-Y2 direction via the flat washers 50 between the half-split frame portions 46 and 48 of the third and fourth facing each other. The pin) 51 and the nut N are rotatably connected to each other.
Each upper end strut portion 39 is rotated by another two portal-shaped connecting metal fittings 34 arranged at both ends on the X1-X2 side of the long frame portion 27a on the Y2 side of the rectangular frame 27. It is connected freely.
That is, in each of the other portal-shaped connecting metal fittings 34, the upper end portion of the support column main body portion 40 with each third cap 47 is inserted between the lower portions of the respective fixing links 36, and these three members remain in this state. 36, 39, 47 are rotatably connected by a fourth bolt (swing pin) 52 extending in the X1-X2 direction and a nut N, respectively.

Next, with reference to FIGS. 5 and 6, the connecting structure of each support column 30 and each of the girders 20 and 21 will be specifically described.
Near both ends of the girders 20 and 21 on the X1-X1 side, a support post is a short pipe made of four aluminum alloys whose pipe shaft extends in the Z1-Z2 direction while penetrating each upper and lower surface. 53 is welded through the upper and lower surfaces, respectively.
Of these, the lower end portions of the roof fixing columns 31 are inserted into the two column posts 53 on the Y1 side. At that time, a large-diameter retaining washer 54 is fixed to the lower end surface of the lower end of each roof fixing column 31 protruding from the lower opening of each column post 53 by screws 55, respectively. As a result, the roof fixing columns 31 are erected on the girders 20 on each Y1 side so as to be vertically movable between the flange F and the retaining washer 54.
Further, the lower end strut portion 38 of each roof swing strut 32 is inserted into the two strut posts 53 on the Y2 side. At that time, of the lower end of each roof swing support 32, another large-diameter retaining washer 54 is fixed to the lower end surface of the portion protruding from the lower opening of each support post 53 by screws 55, respectively. ing. As a result, each roof swing support column 32 is erected on the girder 21 on the Y2 side so as to be vertically movable between the flange F and the retaining washer 54.

Further, each girder 20 and 21 is provided with a pair of left and right handrails 56 over the entire length (FIG. 9). Each handrail 56 is made of an aluminum alloy long in the X1-X2 direction and has a rectangular handrail frame 57. The upper ends of the six aluminum alloy poles 59 are fixed to the predetermined positions in the length direction of the handrail frame 57 at predetermined pitches via brackets 58 which are vertically arranged in pairs. On the other hand, six poles 59 posts made of aluminum alloy are welded to the girders 20 and 21 in the X1-X2 direction at a predetermined pitch through the lower surface thereof. The lower end of each pole 59 is inserted into the corresponding pole post 60. Of each pole 59, another large-diameter retaining washer 54 with a large diameter is fixed by a screw 55 to the lower end surface of a portion protruding from the lower opening of the corresponding pole post 60.
A pair of support plates 61 having an L-shaped cross section in the X1-X2 direction are welded to the lower portion of the inner surface of the slopes of the girders 20 and 21 over the entire length. Each support plate 61 is a long member made of an aluminum alloy, and 19 bolt holes are formed in the flat upper plate piece 62 at a predetermined pitch in the X1-X2 direction. The pitch of each bolt hole is the parallel pitch of each tread plate 22. Further, at the tip of the upper surface of each support plate 61, elongated ridge plate pieces 63 serving as fulcrums for vertical rotation (vertical swing) of each tread plate 22 are screwed in parallel over the entire length thereof.

Further, on the upper part of the inner side surface of the slope of each of the girders 20 and 21, a plurality of pieces having a length substantially the same as the width of two tread plates 22 are separated from the upper plate piece 62 of each support plate 61 by a predetermined interval. The holding plate 64 is detachably connected via a plurality of short bolts 65 and nuts N. Each holding plate 64 is a substantially U-shaped groove-shaped member having an opening facing upward in the X1-X2 direction. The upper plate piece 62 of each support plate 61 and the flat lower plate piece 66 of the corresponding holding plate 64 face each other in a parallel state with a predetermined gap.
Corresponding ends 22a on the Y1-Y2 side of each tread 22 are inserted into these gaps at a predetermined pitch in the X1-X2 direction (FIGS. 9 and 10 (a)). In each of these members 62 and 66, the corresponding end portions 22a of each tread plate 22 in the Y1-Y2 direction are connected by a plurality of connecting bolts 67 and nuts N with a large rattling (swing width). .. Of the connecting bolts 67, a thick rubber ring 68 is provided between the corresponding end 22a of each tread plate 22 and the lower plate piece 66 to prevent squeaking noise during walking due to this rattling. Is inserted. Further, rubber sheets 69 for cushioning, which also prevent the generation of squeaking noise, are attached to the back surfaces of both ends of each tread plate 22 in the Y1-Y2 direction.

Each tread plate 22 is a plate material made of a substantially rectangular aluminum alloy or FRP long in the Y1-Y2 direction, and both end portions 22a in the length direction thereof have a triangular shape. A plurality of bolt holes through which each connecting bolt 67 is inserted are formed in each of these tops.
Further, a plurality of reinforcing ribs 70 are bent and formed at the central portion of each tread plate 22 in the Y1-Y2 direction.
Further, in the central portion of each tread plate 22 on the long side on the X2 side, for example, an overlap portion 71 for preventing a shoe heel or the like from being caught in a gap between adjacent tread plates 22 is arranged. (Fig. 10 (a)).

Next, a method of using the ship boarding / alighting device 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 13.
As shown in FIGS. 1 to 3, after the small vessel 11 berths at a remote island, the vessel boarding / alighting device 10 being stored at the ramp storage site is used by a ground worker using a hand-pushed trolley (not shown). It is moved to the vicinity of the small vessel 11 on the quay 12 and grounded.

On the other hand, the tip of the ship-side slope 16 is hooked on the boarding / alighting deck 14 of the small ship 11 via the hooking portion 23, and the ship-side slope 16 is bridged between the small ship 11 and the ship boarding / alighting device 10. .. Specifically, if necessary, the pair of left and right girders 20, 21 are raised and lowered around the respective depression and elevation axes 19, and the respective girders 20, 21 are moved by a predetermined amount in the left-right direction around the left and right swivel axes 25. The ship side slope 16 is hooked on the boarding / alighting port of the boarding / alighting deck 14 by turning only.

Next, with reference to FIGS. 3, 10 to 13, the automatic follow-up of the ship-side slope 16 when the berthed small vessel 11 moves significantly in the stern direction (Y1 direction) due to the influence of waves, tides, etc. explain.
When the small vessel 11 anchored at the quay 12 moves significantly in the stern direction due to the influence of waves or the like, the girders 20 and 21 that can independently rotate in the left-right direction are centered on the corresponding left-right turning shaft 25. Then, it follows this and makes a large turn in the Y1 direction. Along with this, both ends of each tread plate 22 that can independently rotate in the vertical and horizontal directions are predetermined via the connecting bolts 67 that are hung between the receiving plates of the girders 20 and 21 and the holding plate 64. Rotating in the direction, each tread plate 22 shifts laterally in a diamond shape (parallel quadrilateral shape) in the moving direction of the small vessel 11 while maintaining the parallel state.
As a result, the ship-side slope 16 is largely deformed into a diamond shape in the moving direction of the small ship 11 with the connecting member 17 with the platform 13 as the base end. Therefore, as compared with the conventional ship-side slope 16, the followability of the ship-side slope 16 in the stern direction is improved.
Further, when the berthed small vessel 11 moves in the vertical direction due to the influence of the tide or the like, the girders 20 and 21 that can independently rotate in the vertical direction are arranged around the depression / elevation axis 19. Following it, it rotates up and down, and the ship side slope 16 goes up and down accordingly.

As a result, by adopting an aluminum alloy as the main material of the ship-side slope 16, the weight of the ship-side slope 16 can be reduced, and the small vessel 11 anchored at the port can be shaken without making the ship-side slope 16 heavy. It is possible to cope with a large displacement of the ship side slope 16 due to the ebb and flow of the tide. Further, since the rotating structure is adopted for many of the connecting points of the main members of the ship-side slope 16 in this way, the number of welded points can be reduced as compared with the conventional ship-side slope 16 and maintenance can be facilitated. Furthermore, during maintenance of the ship-side slope 16, welding repair of an aluminum alloy, which requires a special welding technique, is almost unnecessary.
Further, the roof 15 of the ship-side slope 16 is erected by using four columns 30 arranged at both ends in each length direction of a pair of left and right girders 20 and 21 that can independently rotate in the vertical and horizontal directions. ing. Therefore, if the ship-side slope 16 rotates in the left-right direction, a twisting moment may be generated in each of the columns 30 to cause deformation. However, here, when the ship-side slope 16 is rotated in the left-right direction, each roof swing support column 32 swings in the length direction of the ship-side slope 16 around the upper and lower swing pins, so that each support column 30 Deformation (damage) can be prevented.

The present invention is useful as a technique for a ship boarding / alighting device installed on a quay where a ship such as a ferry is anchored.

10 Ship boarding and alighting equipment,
11 small boats,
12 quay,
13 platforms,
14 Boarding deck,
15 roofs,
16 Ship side slope,
20, 21 digits,
22 treads,
30 stanchions,
31 Roof fixing support,
32 Roof swing stanchions,
45 Second bolt (swing pin),
52 Fourth bolt (swing pin).

Claims (2)

A platform for boarding and disembarking that is movable on the quay where small vessels are anchored,
In a ship boarding / alighting device connected to the platform and provided with a ship-side slope whose tip is hung on the boarding / alighting deck of the small ship.
The ship side slope is
A pair of left and right girders, each of which can rotate independently in the vertical and horizontal directions,
A ship boarding / alighting device having a plurality of tread plates laid horizontally between a pair of left and right girders and arranged independently rotatably in the vertical direction and the horizontal direction. The ship-side slope is provided with a roof via four columns arranged at both ends of the pair of left and right girders in the length direction.
Of the four columns, at least two on the left or right side are roof swing columns having a pair of swing pins extending in the width direction of the ship-side slope at the upper and lower ends of each. The ship boarding / alighting device according to claim 1.

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