JP5060218B2 - Lifting device and lifting method - Google Patents

Description

  The present invention relates to an improvement in a boat raising apparatus and a boat raising method for raising and lowering a small boat with respect to a mother ship.

It is known that a work boat and a composite work boat that are conventionally mounted on a ship are individually housed by a lifting device (see Patent Document 1 and Patent Document 2).
JP 2000-335479 A JP 2006-281887 A

  In recent years, there are increasing demands for efficient arrangement and space saving in ships, and restrictions on the arrangement of work boats and complex work boats are also increasing.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a boat raising apparatus and a boat raising method capable of lifting two boats to be lifted without adding a special mechanism. And

  The present invention is applied to a boat raising apparatus and a boat raising method for carrying a loaded boat into and out of the ship.

A winch device that winds or unwinds the wire rope connected to the towed boat and a pair of pillars and a beam that spans each of the pillars are built in a gate shape. A gate type davit that can be tilted and a hydraulic cylinder that controls the tilt of the gate type davit are provided, and the first lifted boat is lifted to a first lifting position on the deck of the lifted boat. A second levitated boat suspended by a wire rope over the first levitated boat and a position substantially horizontal with the first hoisting location on the deck of the levitated boat as you can launch and recovery in a second launch and recovery location in the, characterized in that setting the height of the pair of pillar of the portal davits.

In addition, a winch device that winds or unwinds the wire rope connected to the towed boat, and a pair of pillars and a beam spanned over each pillar, it is constructed in a gate shape, In a method of lifting a boating apparatus comprising a portal davit that is tiltably attached and a hydraulic cylinder that controls the tilting of the portal davit, the first lifted boat is the first on the deck of the harvested boat. The second lifted boat suspended by a wire rope when it is being picked up at the place of picking up 1 over the first lifted boat, the first on the deck of the lifted boat It is characterized in that it is picked up at a second pick-up place that is substantially horizontal to the pick-up place.

  According to the present invention, two boats can be carried in and out by a simple mechanism using one portal davit.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the boat raising apparatus of the present invention is mainly composed of a portal davit 4, winches 5 and 6, and hydraulic cylinders 7a and 7b.

  The gate-type davit 4 is attached to a deck in the vicinity of the hull side of the hull 1 of the lifting boat so as to be tiltable in the left-right direction of the hull 1 and connects the pair of davit frames 4a, 4b and the davit frames 4a, 4b. A gate shape is formed by the beam 4c. The davit frame 4a is provided on the bow side and the davit frame 4b is provided on the stern side.

  The portal davit 4 has a highly rigid structure with a closed cross section.

  The winch 5 is provided on the bow of the portal davit 4 on the bow side, and is used when the work boat 2 which is a lifted boat is raised and lowered. That is, when the work boat 2 is raised and lowered with respect to the hull 1, the sheaves 14, 12 are connected to the work boat 2 with the hooks 11, 12 provided at the tips of the two wire ropes 8, 9, respectively. The wire ropes 8 and 9 are taken up / unwinded through 15.

  The winch 6 is provided on the stern side shoulder of the gate type davit 4 and is used when raising and lowering the combined work boat 3 which is a towed boat. That is, when the composite work boat 3 is raised and lowered with respect to the hull 1, the hook 13 provided at the tip of one wire rope 10 is connected to the composite work boat 3 through the sheave 16. Then, the wire rope 10 is wound up / rolled out. The composite work boat 3 is a smaller boat than the work boat 2.

  The cylinder base end sides of the hydraulic cylinders 7a and 7b are rotatably mounted on the deck of the hull 1, and the piston rod front end sides are respectively attached to the davit frames 4a and 4b. The pair of hydraulic cylinders 7a and 7b functions to tilt the portal davit 4 by its expansion and contraction operation.

  FIG. 2 is a view showing a place where the work boat 2 and the composite work boat 3 are withdrawn as viewed from above the hull 1. The work boat 2 is lifted to a position slightly on the side of the portal davit 4 with the davit frames 4a and 4b standing vertically upward, and the composite work boat 3 is On the center side of the hull 1, it is taken up substantially parallel to the work boat 2.

  FIG. 3 is a diagram for explaining a method for picking up the work boat 2, and FIG. 4 is a diagram for explaining a method for picking up the composite work boat 3, both of which are viewed from the stern side. is there.

  First, a method for lifting the work boat 2 will be described.

  When the work boat 2 has moved to the lateral position of the portal davit 4, the hydraulic cylinders 7 a and 7 b are extended to swing the portal davit 4 toward the work boat 2, and the wire ropes 8 and 9 are placed on the work boat 2. Lower. Then, the wire ropes 8 and 9 and the work boat 2 are connected via the hooks 11 and 12 in a state where the wire ropes 8 and 9 are not extended.

  Subsequently, the winch 5 is operated in a state where the wire ropes 8 and 9 are connected to the work boat 2, and the wire ropes 8 and 9 are wound up. Thereby, the work boat 2 is raised.

  When the work boat 2 is raised to a predetermined height, the operation of the winch 5 is stopped, the hydraulic cylinders 7a and 7b are contracted, and the portal davit 4 is tilted toward the center of the hull. When the work boat 2 suspended by the wire ropes 8 and 9 comes to a position just above the work boat storage position, the tilting of the portal davit 4 is stopped.

  Finally, the winch 5 is operated and the wire ropes 8 and 9 are drawn out to lower the work boat 2 to the work boat retracted position on the deck of the lifted boat.

  When the work boat 2 that has been picked up at the work boat storage position is lowered to the sea surface, a procedure reverse to the above-described pick-up procedure may be performed.

  Next, a method for picking up the composite work boat 3 will be described. Here, a method of lifting the composite work boat 3 in a state where the work boat 2 is lifted to the position shown in FIG. 2 will be described.

  When the composite work boat 3 has moved to the right lateral position of the portal davit 4, the hydraulic cylinders 7a and 7b are extended to swing the portal davit 4 toward the composite work boat 3, and the wire rope 10 is moved to the composite work. Lower it on boat 3. Then, the wire rope 10 and the composite work boat 3 are connected via the hook 13 in a state where the wire rope 10 is not extended.

  In addition, the wire ropes 8 and 9 and the combined work boat 3 are connected via the hooks 11 and 12 in a state where the wire ropes 8 and 9 used for lifting the work boat 2 are not extended. The hooks 11 and 12 are connected to rings (not shown) respectively provided at predetermined positions before and after the composite work boat 3. In FIG. 1, the wire ropes 8 and 9 connected to the composite work boat 3 when the composite work boat 3 is lifted are indicated by dotted lines 8 a and 9 a, respectively.

  Subsequently, the winch 6 is operated in a state where the wire rope 10 and the wire ropes 8 and 9 are connected to the composite work boat 3, and the wire rope 10 is wound up. At this time, the winch 5 is controlled so that the tension of the wire ropes 8 and 9 is not more than a predetermined tension. By connecting the wire ropes 8 and 9 to the composite work boat 3 when the composite work boat 3 is withdrawn, the horizontal swing of the composite work boat 3 can be suppressed.

  When the combined work boat 3 is raised to a predetermined height, the operation of the winch 6 is stopped, the hydraulic cylinders 7a and 7b are contracted, and the portal davit 4 is tilted toward the center of the hull. When the composite work boat 3 suspended by the wire rope 10 comes to the position just above the composite work boat storage position, the portal davit 4 stops tilting.

  At this time, as shown in FIG. 4, the composite work boat 3 moves from the side of the hull 1 to the center side of the hull beyond the work boat 2 that has been collected at the work boat storage location of the hull 1. For this reason, when moving the composite work boat 3 from the side of the hull 1 to the center of the hull, the work boat 2 accommodated on the deck of the hull 1 and the composite work boat 3 are not in contact with each other. The heights of the davit frames 4a and 4b of the portal davit 4 are set in advance.

  Finally, the winch 6 is operated and the wire rope 10 is drawn out to lower the composite work boat 3 to the composite work boat retracted position on the deck of the harvesting boat. Also at this time, the winch 5 is controlled so that the tension of the wire ropes 8 and 9 is not more than a predetermined tension.

  In the case where the composite work boat 3 that has been picked up at the composite work boat storage position is lowered to the sea surface, a procedure reverse to the above-described pick-up procedure may be performed. That is, even when the work boat 2 is in the working boat retracted position, the composite work boat 3 can be lowered to the sea surface over the work boat 2.

  FIG. 5 is a system diagram of the boat raising apparatus according to the embodiment. According to the boat raising apparatus in one embodiment, two boats to be lifted can be picked up by one boat raising apparatus, and various boats for picking up two boats to be picked up can be used. Devices and equipment can be shared.

  As shown in FIG. 5, in the boat raising apparatus in one embodiment, an emergency operation valve stand 61 for operating in an emergency, a hydraulic cylinder valve stand 62 for controlling the hydraulic cylinders 7a and 7b, a hydraulic unit & Air motor unit 63, each valve stand 62, 67, 68 and starter panel 64 for controlling the activation of hydraulic unit & air motor unit 63, lifting / lowering of work boat 2 and lifting / lowering of combined work boat 3 The machine-side switch box 65 provided with a changeover switch (not shown) for switching between and the main controller 66 for starting and stopping the entire system are shared.

  In the system system diagram, what is not shared by the work boat 2 and the composite work boat 3 is the composite work boat drive winch valve stand 67 and the work boat drive winch valve stand 68. The winch 6 that winds and unwinds the wire rope 10 is supplied with hydraulic oil from a hydraulic unit & air motor unit 63 that is a hydraulic source via a combined work boat drive winch valve stand 67. Further, hydraulic oil is supplied from the hydraulic unit & air motor unit 63 to the winch 5 that winds / feeds the wire ropes 8 and 9 through the work boat drive winch valve stand 68.

  As described above, the boat raising apparatus according to the embodiment is stretched over the winch devices 5 and 6 for winding or unwinding the wire rope connected to the lifted boat, the pair of pillars, and the respective pillars. A gate-shaped davit 4 constructed in a portal shape by the beam and attached to the deck of the fishing boat so as to be tiltable, and hydraulic cylinders 7a, 7b for controlling the tilt of the gate-shaped davit 4, When the lifted boat 2 is lifted at the first lift location on the deck of the lifted boat, the second lifted boat 3 suspended by the wire rope is used as the first lifted boat. Pick up over 2 and pick up at the second pick-up location on the deck of the pick-up boat. As a result, two boats to be lifted can be picked up using one portal davit 4. In particular, when a lifted boat is lifted or lowered, for example, a mechanism for sliding the lifted boat is not required separately, so a low-cost boat raising device can be provided. In addition, when the first and second towed boats 2 and 3 are picked up or lowered, they are picked up and lowered from any of the towed boats regardless of the order of picking up and down. be able to.

  Moreover, according to the boat raising apparatus in one embodiment, the two winch devices 5 and 6 are provided, the first winch device 5 is provided on one shoulder of the portal davit 4, and the second winch device. 6 is provided on the other shoulder of the portal davit 4, the number of sheaves can be reduced and wiring can be simplified.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea. For example, in the above-described embodiment, two winch devices are provided, but only one winch device may be provided and shared.

  INDUSTRIAL APPLICABILITY The present invention can be used for a boat raising apparatus and a boat raising method for hanging a loaded boat and carrying it in and out of the vessel.

The figure which shows the structure of one Embodiment of the boat raising apparatus by this invention. The figure which shows the collection place of the work boat and the compound work boat as seen from above the hull Illustration for explaining the method of lifting a work boat Diagram for explaining the method of lifting a combined workboat System diagram of a boat raising apparatus in one embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ship's hull 2 Work boat 3 Combined work boat 4 Gate type davit 5 Winch 6 Winch 7a, 7b Hydraulic cylinder 8 Wire rope 9 Wire rope 10 Wire rope

Claims (5)

A winch device for winding or unwinding the wire rope connected to the lifted boat;
A portal davit constructed in a gate shape with a pair of pillars and beams spanned over each pillar, and attached to the deck of the fishing boat so that it can tilt.
A hydraulic cylinder for controlling the tilt of the portal davit,
The second lifted boat suspended by the wire rope when the first lifted boat is picked up at a first pick-up location on the deck of the picked-up boat. The portal davit so that it can be picked up over a first picked-up boat to a second pick-up location that is substantially horizontal to the first pick-up location on the deck of the picked-up boat. A lifting device characterized in that the height of a pair of pillars is set.   The winch device includes a first winch device that winds or unwinds a wire rope connected to a first lifted boat, and a wire rope that is connected to a second lifted boat. The boat raising apparatus according to claim 1, further comprising a second winch device that performs a pay-out.   3. The lifting device according to claim 2, wherein the first winch device is provided on one shoulder of the portal davit and the second winch device is provided on the other shoulder of the portal davit. Boat equipment.   At least the gate type davit, the hydraulic cylinder, a valve stand for the hydraulic cylinder, and a hydraulic source for supplying hydraulic oil to the winch device, the first lifted boat and the second lifted The boat raising device according to any one of claims 1 to 3, wherein the boat raising device is shared as a device for lifting or lowering the boat. A winch device for winding or unwinding the wire rope connected to the lifted boat;
A portal davit constructed in a gate shape with a pair of pillars and beams spanned over each pillar, and attached to the deck of the fishing boat so that it can tilt.
In the method of lifting a boat, including a hydraulic cylinder that controls the tilt of the portal davit,
The second lifted boat suspended by the wire rope when the first lifted boat is picked up at a first pick-up location on the deck of the picked-up boat. Lifting a boat to be lifted over a first lifted boat to a second lifting location that is substantially horizontal to the first lifting location on the deck of the lifted boat. Method.