JP2003026081A - Bow ramp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for sealing a turning base of a bow ramp for putting a bow ramp device to practical use. SOLUTION: This bow ramp device has a bow visor 2 arranged on the tip of a hull 1 so as to be openable-closable, and the turning base 5 for turnably supporting the bow ramp 3 to the hull 1 on the inside of the bow visor 2, and has an inner ring 59 and an outer ring 56 for relatively rotating on the turning base 5 via a ball 58, an inner ring fixing plate 51 fixed to the inner ring 59, and expanding along the outer ring 59, and annular lip seals 61 and 62 interposed between the inner ring fixing plate 51 and the outer ring 56, and seals the inside of the turning base 5 via these seal lips 61 and 62.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an improvement of a bow lamp device for loading and unloading vehicles by self-propelled.

[0002]

[Background Art] [Problems to be Solved by the Invention] For disaster rescue and the like, beaching is performed by riding a ship from the bow side to the beach, or the hull is laid on the quay and the bow lamp is swung to turn it between the ship and the quay. Practical use of a bow lamp device that can be used even when it is delivered to the user is desired.

In such a bow lamp device, if the structure of a stun lamp device or the like provided in a conventional ro-ro ship or the like is applied as it is, the weight and the like increase, and it is difficult to seal the swivel base of the bow lamp. It was

An object of the present invention is to provide a structure for sealing a swivel base of a bow lamp in order to put the bow lamp device into practical use.

[0005]

SUMMARY OF THE INVENTION A first invention is a bow visor which is openably and closably provided at a tip of a hull, a bow lamp which is provided inside the bow visor so as to be lifted, and a bow lamp which is rotatably supported. It applies to bow lamp devices equipped with a swivel base.

[0006] The inner ring and the outer ring that rotate relative to each other on the swivel through a plurality of balls, the inner ring fixing plate that is fixed to the inner ring and extends along the outer ring, and the inner ring fixing plate and the outer ring are interposed between the inner ring and the outer ring. An annular lip seal is provided, and the inside of the swivel base is sealed via the lip seal.

A second invention is characterized in that, in the first invention, a plurality of lip seals are provided side by side between the inner ring fixing plate and the outer ring, and grease is filled between the respective lip seals. And

A third invention is characterized in that, in the first or second invention, a sealing material is interposed between the inner ring and the outer ring.

[0009]

According to the first aspect of the invention, as the seal structure of the swivel base, since the annular lip seal is interposed between the inner ring fixing plate and the outer ring, the inner space of the swivel base is covered by this lip seal. It is sealed and can prevent water from entering the slewing bearing. As a result, the durability of the swivel base provided inside the bow visor can be ensured.

According to the second aspect of the invention, since grease is filled between the lip seals, wear of the lip seals is suppressed and the sealing performance can be maintained.

According to the third aspect of the invention, the inside and outside of the slewing bearing are sealed even through the sealing material, and the durability of the slewing base can be improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a bow visor 2 for opening and closing a bow opening 4 is provided at the tip of the hull 1, and a bow lamp is provided between the bow visor 2 and the bow opening 4 inside the bow visor 2 in the closed position. 3 is stored in a folded state.

As shown by the chain double-dashed line in FIG. 1, in a ramp state in which the bow ramp 3 projects from the tip of the hull 1 and is bridged over the quay or the like, the vehicle passes over the bow ramp 3 through the ramp. It is self-propelled and loaded and unloaded.

As shown in FIG. 2, the bow visor 2 is supported by the left and right hinges 21 so that it can be elevated. A wire 23 is connected between the left and right hinges 21 and the hydraulic opening / closing cylinder 22, and the expansion / contraction operation of the hydraulic opening / closing cylinder 22 causes the bow visor 2 to rotate and open / close. By the hinge 21 coming into contact with the stopper 24,
The bow visor 2 is supported in the open position. Bow visor 2
In its closed position, the cleats are secured to the hull 1 by actuating a plurality of cleats via hydraulic cylinders 25 (see FIG. 4). A seal (not shown) is provided between the bow visor 2 in the closed position and the hull 1 so as to seal the two.

The bow lamp 3 is attached to a base walking board 31 which is connected to the hull 1 so as to be elevated, an intermediate walking board 32 which is rotatably connected to the tip of the root walking board 31, and a tip of the intermediate walking board 32. And a flap 33 that is rotatably connected. The root walker 31 and the intermediate walker 32 have a box structure to ensure rigidity that allows a vehicle having the same weight as the bow lamp 3 (for example, 10 to 15 tons) to run.

Pulleys 34 are connected to the left and right ends of the base walk plate 31, respectively, and the respective walk board wires 35 wound around the pulleys 34 are wound through the pulleys 71 to 74 (see FIG. 2). A plate winch 36 (see Figure 4) is provided. Further, left and right hydraulic expansion cylinders 37 (see FIG. 4) that rotate the intermediate walk plate 32 with respect to the root walk plate 31 are provided.
The bow lamp 3 is folded in two by the operation of each step winch 36 and each hydraulic expansion cylinder 37. As another embodiment, the bow lamp may be folded in three.

The elevation central axis (pin) 38 of the bow lamp 3 is arranged below the lower edge 4a of the bow opening 4, and the bow opening 3 is opened and closed by raising the bow lamp 3. A space 12 is provided below a floor surface 11 extending from the bow opening 4, and the elevation center axis 38 of the bow lamp 3 and the swivel base 5 are arranged in the space 12.

By winding the walking board wire 35 around each walking board winch 36, the root walking board 31 rises to close the bow opening 4, while the walking board wire 35 is unwound from each walking board winch 36. The foot plate 31 descends to open the bow opening 4.

A plurality of cleats 8 for securing the foot plate 31 in the closed position to the hull 1 are provided. Each cleat 8 is driven via each hydraulic cylinder 13 (see FIG. 4).

Root walker 31 and bow opening 4 in the closed position
A seal 7 is provided to seal between the two. The seal 7 is provided all around the bow opening 4.

As shown in FIG. 3, the swivel base 5 has an inner ring fixing plate 51 fastened to the hull 1 via bolts 52, a swivel plate 53 having the elevation center shaft 38, and an inner ring fixing plate 51. And a swivel bearing 54 that supports the swivel plate 53 in a swivel manner. As a result, the swivel base 5 rotatably supports the elevation center shaft 38 of the bow lamp 3.

The slewing bearing 54 has a bolt 5 attached to the inner ring fixing plate 51.
5, an inner ring 59 fastened via 5, an outer ring 56 fastened to the swivel plate 53 via bolts 57, and a large number of balls 58 interposed between the annular groove 59a of the inner ring 59 and the annular groove 56a of the outer ring 56. With.

As a seal structure of the swivel base 5, annular lip seals 61 and 62 are interposed between the inner ring fixing plate 51 and the outer ring 56. The inner ring fixing plate 51 has an annular protrusion 51.
a and 51b are formed side by side, and these annular convex portions 51 are formed.
The inner and outer lip seals 61 and 62 are fixed via a and 51b.

The lip seals 61 and 62 have lip portions 61a and 62a in contact with the lower surface 56b of the outer ring 56, and seal the inside and outside of the slewing bearing 54.

Grease is filled between the lip seals 61 and 62 and inside the lip seal 61.

A disc-shaped sealing material 64 is interposed in the inner ring 59 and is in contact with the lower surface 56b of the outer ring 56. Further, the outer ring 56 is provided with a disc-shaped sealing material 65 which is in contact with the upper side surface 59b of the inner ring 59. The inside and outside of the slewing bearing 54 are also sealed through the sealing materials 64 and 65.

As a mechanism for turning the bow lamp 3, as shown in FIG. 2, stress wires 41, 42 are connected to the left and right end portions of the base walk plate 31, respectively.
Left and right hydraulic stress cylinders 43, 44 that pull in 42
Is provided. The stress wires 41 and 42 are guided in the middle through pulleys 45 and 46 which can be swung. The developed bow lamp 3 is supported by the stress wires 41 and 42. By making the lengths of the hydraulic stress cylinders 43, 44 different and making the lengths S _L and S _R of the stress wires 41, 42 connecting the pulleys 45, 46 and the root walker 31 different, It is adapted to turn left and right through the swivel base 5. As shown by the solid line in FIG. 2, when the length S _R of the wire 42 is made shorter than the length S _L of the wire 41, the bow lamp 3 is pivoted rightward and supported. On the contrary, the length S _R of the wire 42 is changed to the length S _{L of the} wire 41.
When the length is made longer, the bow lamp 3 pivots to the left and is supported.

The pulleys 4 are so arranged that the sum S _L + S _R of the lengths of the stress wires 41, 42 connecting the pulleys 45, 46 to the foot plate 31 is substantially constant regardless of the turning angle of the bow lamp 3.
Installation positions such as 5,46 are provided. The hydraulic stress cylinders 43 and 44 are synchronously expanded and contracted so that the lengths S _L and S _{R of the} wires 41 and 42 are kept constant while keeping the sum S _L + S _R of the lengths of the stress wires 41 and 42 substantially constant. The bow lamp 3 turns while keeping its elevation angle substantially constant.

As a mechanism for expanding and contracting the hydraulic stress cylinders 43 and 44 in synchronization with each other, a tuning cylinder 47 is provided as shown in FIGS. Tuning cylinder 47
Is the rod side chamber 43 of each hydraulic stress cylinder 43, 44.
It has tuning pressure chambers 47a and 47b communicating with a and 44a, and driving pressure chambers 47c and 47d to which driving pressure is introduced via an electromagnetic switching valve 48.

When the bow lamp 3 is turned, first, the operation check valves 74 and 75 are operated via the electromagnetic switching valve 73.
Is closed, and the operation check valves 62 to 65 are opened via the electromagnetic switching valve 61 to open the rod side chambers 43a, 4 of the hydraulic stress cylinders 43, 44.
4a communicates with the tuning pressure chambers 47a and 47b of the tuning cylinder 47, respectively. At this time, the braking of the brake of each walking board winch 36 is released, and each walking board wire 35 is loosened.

In this state, when the electromagnetic switching valve 48 is switched to the position a, the hydraulic oil discharged from the hydraulic pumps 66, 67 is guided to one driving pressure chamber 47d and flows out from the other driving pressure chamber 47c. The hydraulic oil is returned to the tank 68. In this way, the tuning cylinder 47 operates in one direction to expand the tuning pressure chamber 47b, while the tuning pressure chamber 47a contracts, whereby the right hydraulic stress cylinder 44 expands and the left hydraulic stress cylinder 43 contracts. The bow lamp 3 to the left.

When the electromagnetic switching valve 48 is switched to the position b, the hydraulic oil discharged from the hydraulic pumps 66 and 67 is guided to one driving pressure chamber 47c and the other driving pressure chamber 47.
The hydraulic oil flowing out from d is returned to the tank 68. In this way, the tuning cylinder 47 operates in the opposite direction and the tuning pressure chamber 4
7b contracts, while the entrainment pressure chamber 47a expands, the right hydraulic stress cylinder 44 contracts and the left hydraulic stress cylinder 43 expands, causing the bow lamp 3 to turn to the right.

When the electromagnetic switching valve 48 is switched to the neutral position c, the inflow / outflow of the hydraulic oil to / from the drive pressure chambers 47c, 47d is stopped, and the synchronizing cylinder 47, the right hydraulic stress cylinder 44, and the left hydraulic stress cylinder 43. The expansion and contraction operation of is stopped. As a result, the turning operation of the bow lamp 3 is stopped, and the bow lamp 3 is held at the stopped turning position.

When the bow lamp 3 is elevated, first, the operation check valves 62 to 65 are operated via the electromagnetic switching valve 61.
Is closed to disconnect the hydraulic stress cylinders 43 and 44 from communication with the tuning cylinder 47, and the operation check valves 74 and 75 are connected via the electromagnetic switching valve 73.
Is operated to control the supply and discharge of hydraulic oil to and from the hydraulic stress cylinders 43 and 44 via the electromagnetic switching valves 76 and 77. At this time, the braking of the brake of each walking board winch 36 is released, and each walking board wire 35 is loosened.

In this state, when each electromagnetic switching valve 76, 77 is switched to the position a, each hydraulic stress cylinder 43, 44 contracts to raise the bow lamp 3, while each electromagnetic switching valve 76, 77 moves to the position. When switched to b, the hydraulic stress cylinders 43 and 44 extend and the bow lamp 3 descends.

In FIG. 4, 81 is a hydraulic cylinder for driving a stopper for holding the bow visor 2 in the open position, and 82.
Is an electromagnetic switching valve that switches the supply and discharge of hydraulic oil to and from the hydraulic cylinder 82. Reference numeral 83 is an electromagnetic switching valve for the hydraulic cylinder 25 of the cleat of the bow visor 2, 84 is an electromagnetic switching valve for the hydraulic opening / closing cylinder 22, 85 is an electromagnetic switching valve for the hydraulic expansion cylinder 37, and 86 is an electromagnetic switching for each hydraulic cylinder 13 of the cleat 8. Reference numeral 87 is an electromagnetic switching valve for the hydraulic motor 89 of the walking board winch 36, and 88 is an electromagnetic switching valve for the brake driving hydraulic cylinder 39 of the walking board winch 36.

FIG. 6 is an explanatory view showing a usage example of the bow lamp 3. Explaining this, first, in the case of beaching as shown in (a), with the hull 1 riding on the beach from the bow side, the bow ramp 3 is deployed to form a boarding / alighting path connecting the inside of the ship and the beach. .

As shown in FIG. 6 (b), when the berth is to be laid vertically, the bow lamp 3 is used while the hull 1 is pulled toward the quay by both the mooring winches and the rear anchor winches.
To form a boarding and alighting path that connects the interior of the ship with the quay.

As shown in FIG. 6 (c), when carrying out a bow-to-bow for loading and unloading a vehicle between two ships, the hulls 1 are pulled backward by the two-side mooring winches,
The bow ramp 3 is unfolded from each ship and overlapped to form a boarding / alighting path that connects the ships.

As shown in FIG. 6 (d), when the berth is laterally laid, the bow ramp 3 is unfolded and swung after the hull 1 is pulled to the quay by the mooring winch to turn the inside and the quay. Form a contact road.

The operation of the embodiment of the present invention configured as described above will be described below.

With both the bow visor 2 and the bow lamp 3 in the closed position, the space outside the bow opening 4 on the ship is surrounded by the bow visor 2, and the bow opening 4 is closed by the root walker 31. Therefore, even if the water crosses over the bow visor 2 and enters the ship, it is possible to reliably prevent the water from entering the inside of the ship through the bow opening 4 by the root walker 31. The water that has crossed over the bow visor 2 and has entered the ship is discharged outside the ship via a pump or the like.

As a seal structure of the swivel base 5, annular lip seals 61 and 62 are interposed between the inner ring fixing plate 51 and the outer ring 56, so that the inner space of the swivel base 5 has a lip seal 6.
The water is prevented from entering the slewing bearing 54 by being sealed by 1, 62.

Since grease is filled between the lip seals 61 and 62 and inside the lip seal 61, wear of the lip seals 61 and 62 is suppressed and the hermeticity can be maintained. As a result, the durability of the swivel base 5 provided inside the bow visor 2 can be ensured.

Further, since the sealing materials 64 and 65 are interposed between the inner ring 59 and the outer ring 56, these sealing materials 6
The inner and outer sides of the swivel bearing 54 are also sealed through the interpositions 4 and 65, and the durability of the swivel base 5 can be improved.

As another embodiment, the inner ring fixing plate 51 may be formed integrally with the inner ring 59.

It is obvious that the present invention is not limited to the above-mentioned embodiments and various modifications can be made within the scope of the technical idea thereof.

[Brief description of drawings]

FIG. 1 is a side view of a bow lamp device showing an embodiment of the present invention.

FIG. 2 is a plan view of the bow lamp device.

FIG. 3 is a sectional view of a slewing bearing.

FIG. 4 is a hydraulic circuit diagram of the same.

FIG. 5 is a hydraulic circuit diagram of the same.

FIG. 6 is an explanatory view showing a usage example of a bow lamp.

[Explanation of symbols]

1 hull 2 Bow visor 3 Bow Lamp 4 bow opening 5 swivel base 7 seal 8 cleats 51 Inner ring fixing plate 56 outer ring 58 balls 59 Inner Ring 61 lip seal 62 lip seal 64 sealing material 65 sealing material

Claims (3)

[Claims] 1. A bow lamp device comprising a bow visor openably and closably provided at a tip of a hull, a bow lamp provided inside the bow visor so that the bow lamp can be lifted, and a swivel base rotatably supporting the bow lamp. An inner ring and an outer ring that relatively rotate on the swivel through a plurality of balls; an inner ring fixing plate that is fixed to the inner ring and extends along the outer ring; and an annular lip seal that is interposed between the inner ring fixing plate and the outer ring. A bow lamp device, characterized in that the inside of the swivel base is sealed via the lip seal. 2. The bow lamp device according to claim 1, wherein a plurality of lip seals are arranged side by side between the inner ring fixing plate and the outer ring, and grease is filled between the lip seals. 3. The bow lamp device according to claim 1, wherein a sealing material is interposed between the inner ring and the outer ring.