JP4587902B2 - Stern collection ship - Google Patents

Description

  The present invention relates to a stern containment vessel that is a slipway type or dock type mother ship in which boats are moved in and out from the stern.

  Some vessels that perform security rescue and various marine surveys are equipped with boats that can sail away from the mother vessel, such as when lifesaving work or landing on a small island is necessary. In this case, the boat is detached from the mother ship to perform lifesaving work and landing work, and a lifting device is used to accommodate the ship in the mother ship. In particular, a mother ship that mainly uses boats, such as security and rescue, employs a slipway method or a dock method that allows it to be removed from the stern and lifted.

  As a slipway system, for example, there is a boat hoisting device disclosed in Patent Document 1. This lifting device is a lifting device for lifting a water jet propulsion type boat having a plurality of wheels on the bottom of a ship to a ship, and an inner bottom surface is located below the sea surface at the rear of the ship hull. A boat's lifting recess with an end bottom located above the sea surface is formed, and a boat guidance platform is provided in the lifting recess so as to be able to move in and out from the hull. The winch device is provided.

Actual application No.59-156888

  In the slipway type mother ship, a door body for entering and exiting the boat is provided in the transom portion serving as an entrance. The door body is generally provided with a double door so that the transom portion can be fully opened. Since the hinge shaft that serves as a shaft for opening and closing this type of conventional door body is along the vertical direction, the following problems may occur.

  On the bottom surface along the traveling direction of the mother ship, the central part along the keel is located at the deepest part, and gradually becomes shallower from this central part to the shore side. On the other hand, the doors of the double doors overlap the left and right door bodies at the distal end, the distal end is located at the center of the mother ship, and the length of the base end connected to the hinge shaft is the distal end. Is smaller than For this reason, in a state where the door body is opened, the tip portion longer than the hinge shaft is positioned on the heel side with respect to the hinge shaft, and the lower end portion of the tip of the door body protrudes from the ship bottom.

  When the boat is disengaged or withdrawn, the door body will be opened, but because it is sailing, the flow from the bottom of the mother ship to the rear becomes a vortex at the stern and the door body. It becomes a resistance to open the door body. For this reason, in order to make it fully open, a big power will be needed and it is in the situation which cannot be made fully open. In addition, the portion protruding from the bottom of the ship may become a resistance to cruising and reduce the speed of the ship. For example, deceleration is desirable when work in a short time is required, such as security and rescue. Absent.

  Accordingly, an object of the present invention is to provide a stern unloading ship that is not affected by the flow of water from the bottom to the rear as much as possible when opening a door with a double door provided at the stern while opening. Yes.

  As a technical means for achieving the above object, the stern collection ship according to the present invention disengages a boat housed in a dock provided at the stern from the dock, and moves the detached boat from the stern to the dock. In a stern collection ship that is a stern collection ship that is to be picked up and is provided with a door body that can be opened and closed with double doors at the stern, a pair of hinge shafts for opening and closing the door body has an inter-axis distance. The lower side is larger than the upper side and is inclined with respect to the vertical direction, and the lower end of the door body is positioned higher than the bottom of the mother ship when the door body is opened.

  The door body is opened and closed with double doors by rotating about the hinge shaft. In the opened state, the door body rotates obliquely upward, so that the door body is positioned in the stern transom plane.

  Further, the stern collection ship according to the invention of claim 2 is an upper part of the double opening so as to be slidable in a direction perpendicular to the traveling direction of the stern collection ship above the dock and above the door body. It is characterized by providing a lid.

  For example, at the time of normal accommodation, it is desired to provide a lid on the dock so as to remove wind and rain. However, since the boats move up and down during stormy weather, and the ship is lifted, the ceiling formed by the lid is pressed, and the crew may feel a sense of fear. In view of this, a lid that can be opened and closed is provided at a position above the door so as to ensure a field of view during work and to cope with stormy weather.

  According to the stern collection ship according to the present invention, the lower end portion of the door body does not protrude below the bottom of the ship when opened, so that it is affected as much as possible by the flow of water from the bottom to the rear when the door is opened. There is nothing. For this reason, the door can be smoothly opened without requiring a large amount of power, and can be fully opened. In addition, since there is no projecting portion downward from the bottom of the ship, there is no resistance to cruising, and the lifting operation can be performed smoothly without deceleration.

  Further, according to the stern collection ship according to the invention of claim 2, since the lid can be opened when the boat is detached and withdrawn, it is given to the crew even when the boat is lifted upward in case of stormy weather. A feeling of fear can be suppressed as much as possible, smooth boarding and unloading can be performed, and a lifting operation can be performed in a short time.

  Hereinafter, based on the preferred embodiment shown in the drawings, a stern-lifting ship according to the present invention will be described together with a boat-lifting device provided in a mother ship 1 that is a stern-lifting ship. FIG. 4 is a perspective view showing the rear part of the mother ship 1 with a part cut away, and FIG. 5 is a partially cut side view showing the structure of the rear part. At the center of the stern of the mother ship 1, a dock 2 is provided by a recess formed in the deck. The dock 2 has a size that can accommodate a boat, and has a transom portion that is opened at the stern to provide a transom portion. The slipway system allows the boat 3 to enter and exit from the transom portion. As shown in FIG. 5, the floor surface 2 a of the dock 2 is formed in an inclined surface with the stern side being lower, and the stern side is submerged to an appropriate depth from the water surface L. Further, as shown in FIG. 6, the transom portion of the dock 2 is provided with a double door body 4 that opens and closes around a hinge shaft 4 a. As shown in FIG. 6, the dock 2 has a wide opening on the side of the door body 4, and can accommodate the boat 3 from the center of the dock 2 to the bow side, hindering the crew of the boat to get on and off. There is no gap between the boat and the boat. Further, the floor surface 2a is stretched with a member having a small coefficient of friction so that the boat 3 can smoothly slide, such as a synthetic resin such as a fluororesin.

  On the floor surface 2a of the dock 2, there is provided a belt conveyor 5 provided with a belt 5a that moves endlessly with the traveling direction of the mother ship 1 as the moving direction, and the conveying surface of the belt conveyor 5 substantially coincides with the floor surface 2a. I'm allowed. That is, the conveying surface of the belt conveyor 5 forms a part of the floor surface 2a. Therefore, as shown in FIG. 4, the belt conveyor 5 is disposed in an inclined manner. In addition, protrusions 5b are formed on the transport surface at appropriate intervals. Further, the tip of the floor 2a facing the stern side end of the belt conveyor 5 is bent to form a curved portion 2b, and between the curved portion 2b and the stern side end of the belt conveyor 5. A gap G through which the protrusion 5b can pass is formed between them. The belt conveyor 5 is stretched between a driving motor 6 and driven by a driving belt 6a. The drive system is not limited to the belt drive, and may be a system directly connected to the shaft of the drive motor, a drive system that shifts using a gear box, or the like.

  On the other hand, on the bottom surface of the boat 3 at the center of the bow side, there is provided a flange 3a that can be engaged with and disengaged from the protrusion 5b. As will be described later, the position at which the heel portion 3a is attached is a position where the heel portion 3a can engage with the protruding portion 5b when the boat 3 enters the dock 2. In addition, since a pair of skegs 3b are provided on the bottom surface of the stern side of the boat 3 so as to improve the straightness of the boat 3, the width of the belt conveyor 5 is determined by the distance between the pair of skegs 3b. Is smaller than that. Further, as shown in FIGS. 1 and 5, a roller 7 a is provided at the stern side end of the bottom surface 2 a of the dock 2, and the bottom surface of the boat 3 comes into contact with the roller 7 a when entering and exiting the dock 2. It is like that. Also, as shown in FIGS. 4 to 6, when the wall surface of the dock 2 is provided with rollers 7b at appropriate intervals from the opening side to the appropriate position, the boat 3 is inadvertently biased from the center of the dock 2. For example, the boat side of the boat 3 is in contact with these rollers 7b.

  As shown in FIGS. 1 and 6, the door body 4 is a double door that opens and closes by rotating around the hinge shaft 4a. The inter-shaft distance of the hinge shaft 4a is set so that the upper side is smaller than the lower side and has a C-shape. For this reason, when the door body 4 is opened, the lower end portion of the door body 4 is positioned above the bottom surface of the mother ship 1 as shown in FIG.

  Further, as shown in FIGS. 1 to 3, a pair of upper lids 8 are provided above the dock 2 so as to open and close with a double opening by sliding in the horizontal direction. The upper lid 8 is paired in the traveling direction of the mother ship 1 with the longitudinal direction being a direction perpendicular to the traveling direction of the mother ship 1 above the dock 2 and above the upper end of the door body 4. The guide rail 8a is laid to guide and slide. 2 (b) and 2 (c), the guide rail 8a on the bow side of the dock 2 is laid on a rail bracket 8b projecting from the wall surface on the bow side of the dock 2, and the guide rail 8a on the stern side. Is laid on an upper frame 4b provided at the upper end of the door body 4 so that the upper surface of the upper lid 8 and the surface of the rear deck 1a coincide. Further, as shown in FIG. 4, a boarding / unloading deck 2c for getting on and off the boat 3 taken up by the dock 2 is provided, and the upper lid 8 is opened and closed including this boarding / unloading deck 2c. It is. The pair of upper lids 8 are configured to open and close by transmitting power from the driving device 9 via a power transmission mechanism configured by combining a wire 9a and a pulley 9b.

  The operation of the stern collection boat according to the embodiment of the present invention configured as described above will be described below together with the boat collection operation.

  When the boat 3 that has left the mother ship 1 is to be withdrawn to the mother ship 1, the boat 3 faces the stern of the mother ship 1 as shown by an imaginary line in FIG. Let it enter. At this time, the belt conveyor 5 is operated to bring the belt 5a into an endless circulating movement. When the boat 3 enters the dock 2 and the bow reaches the end of the belt conveyor 5 on the stern side, the brim 3a rides on the belt 5a. When the projection 5b provided on the belt 5a is engaged with the flange 3a, the boat 3 is moved by the movement of the belt 5a thereafter. Since the belt conveyor 5 is inclined, the boat 3 is pulled up into the dock 2 and is lifted as shown by a solid line in FIG.

  When the boat 3 is pulled up, the skeg 3b scrapes the floor 2a of the dock 2, but since the material with a small coefficient of friction is stretched on the floor 2a, the boat 3 is lifted up smoothly. . Further, since the width of the belt conveyor 5 is smaller than the interval between the skegs 3b of the boat 3, the skegs 3b do not come into contact with the belt conveyors 5.

  When the boat 3 housed in the mother ship 1 is to be removed, the belt conveyor 5 is operated so that the belt 5a circulates in an endless manner in the direction opposite to that at the time of lifting. By the movement of the belt 5a, the belt 5a moves backward from the position indicated by the solid line in FIG. By this retreat, the boat 3 gradually moves from the stern to the water. When the saddle portion 3a of the boat 3 reaches the gap G between the belt conveyor 5 and the floor surface 2a, the projection 5b is separated from the saddle portion 3a. Thereafter, the boat 3 slides off the floor surface 2a and separates from the dock 2. It will be.

  When the boat 3 is detached or lifted, the door body 4 is opened. When the door body 4 is opened, the lower end of the door body 4 does not protrude from the bottom of the mother ship 1 as shown in FIG. For this reason, since the water pressure by flowing backward from the ship bottom to the door body 4 is not applied to the door body 4 at the time of sailing at high speed, the opening operation can be performed smoothly. Moreover, the door body 4 does not become a resistance to navigation even in the open state.

  In general, the work is performed with the upper lid 8 opened in order to secure a field of view when leaving and picking up. At this time, since the upper lid 8 does not exist above the dock 2, there is no ceiling, and the crew member does not have a sense of fear even when the boat 3 is lifted upward by waves during stormy weather. For this reason, the lifting operation can be performed without hindrance, and the boat can be lifted in a short time.

  In the embodiment described above, the belt conveyor 5 is used as the lifting device, the protrusion 5b is formed on the belt 5a, and the flange 3a that engages and disengages the protrusion 5b is provided on the bottom of the boat 3. However, the lifting device is not limited to the one using the belt conveyor 5 and may be, for example, a device using a winch or the like.

  According to the stern collection ship according to the present invention, since the lower end of the door body does not protrude from the bottom of the ship, the door body can be easily opened to the fully open position, and the speed of the boat is not reduced. Therefore, it can be advantageous for security rescue, for example, which requires a short time work. In addition, by providing an openable upper lid on the dock, the fear of the crew and the like can be reduced when leaving or lifting during stormy weather, and smoother lifting operations can be performed.

It is a figure which shows the stern of the stern collection ship which concerns on this invention, and has written together the state which the door body opened, and the closed state. (A) is a plan view of the dock of the boat lifting device according to the present invention, the case where the upper lid of the dock is in the released position and the case where it is in the closed position, ) Shows a guide rail mounting structure disposed on the upper part of the door body, and (c) shows a guide rail mounting structure on the bow side of the dock. FIG. 3 is a left side view of the upper lid shown in FIG. 2 and a view from the stern side. It is a perspective view which cuts and shows the outline of the stern of the stern collection ship which concerns on this invention. It is a side view for demonstrating the general | schematic structure of the boat lifting / lowering apparatus provided in the stern of the stern / harvesting ship which concerns on this invention. It is a top view for demonstrating the general | schematic structure of the boat collecting device provided in the stern of the stern collection ship which concerns on this invention.

Explanation of symbols

1 Mother ship 2 Dock
2a Floor 3 Boat
3a buttock
3b Skeg 4 Door
4a Hinge shaft 5 Belt conveyor
5a belt
5b Projection
7a, 7b Roller 8 Upper lid
8a Guide rail G Gap

Claims (2)

A stern collection ship that removes a boat housed in a dock provided at the stern from the dock and unloads the detached boat from the stern to the dock. In the provided stern collection ship,
A pair of hinge shafts for opening and closing the door body is inclined with respect to the vertical direction with the distance between the axes being larger than the upper side, and the lower end of the door body is lower than the bottom of the mother ship when the door body is opened. The stern lifter is also located in the upper position.   2. The upper lid of the double opening is provided above the dock and above the door so as to be slidable in a direction perpendicular to the advancing direction of the stern collection ship. A stern collection ship.

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