JPH039519Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hoisting device for hoisting a propulsion shaft when a small ship is hoisted (unloaded).

Conventional manual hoisting devices have operating parts that protrude from the upper surface of the stern deck, which poses an obstacle when viewed from the perspective of fishing operations, which limits the operations and also poses a safety problem. There are many.
In addition, defects arising from the hoisting mechanism, such as providing a female thread on the hoisting tube itself and hoisting the hoisting tube directly with a screw shaft, or attaching a rack to the hoisting tube and engaging a pinion with the rack, and using the pinion to hoist the hoisting tube. In a mechanism for lifting a pipe, if the salvage pipe is bent and deformed due to external force (wave resistance, driving force, etc.) via the propulsion shaft, the effect is not limited to the sliding guide of the salvage pipe. The drive mechanism itself was defective, with many failures and making salvage difficult.

Therefore, in view of the above circumstances, the present invention has been devised so that no obstacles protrude from the upper surface of the stern deck during ship maneuvering, and by indirectly hoisting the salvage pipe during hoisting, the bending deformation of the salvage pipe is prevented from being caused by the salvage drive. To provide a hoisting device consisting of a hoisting mechanism which allows easy hoisting operation without affecting the life of the driver and has a long life of a driving part. Therefore, an object of the present invention is to provide a hoisting device that contributes to safe and efficient operation of the upper deck surface, and is also functionally trouble-free and economically efficient. The purpose is to lock a small-diameter threaded shaft to a rotatable seat in parallel with the salvage pipe on a fixed seat integrated at the top of the salvage pipe that rotatably and slidably supports the propulsion shaft at the lower end. A large-diameter screw shaft is fitted onto the shaft so that it can be freely joined by a clutch plate, and the large-diameter screw shaft is locked to a screw seat that extends integrally to a support that supports the salvage pipe in a slidable manner at a predetermined position. This is achieved by a lifting mechanism that restricts the upper surface of the fixed seat to the upper surface of the deck.

Here, the present invention will be explained in detail based on a preferred embodiment thereof and with reference to the attached drawings.As shown in FIG. However, in the present invention, the top of the hoisting device does not protrude from the upper deck surface 1 as shown in Figure 2, and the device is installed inside the stern hull.
The top portion protrudes from the upper surface 1 of the deck only when the deck is lifted up, as shown by the imaginary line. That is, the salvage pipe 5, which has an integrated bearing 4 that rotatably and slidably supports the propulsion shaft 3 at its lower end, is slidably guided by a support tube 7 of a support 6 fixed to the hull, and is fixed to the top of the support tube 7. Combine seat 8,
A small diameter screw shaft 9 is mounted on the fixed seat 8 in parallel with the lifting pipe 5.
is rotatably supported by a bearing 10, a ring-shaped clutch plate 11 is engaged with the small-diameter screw shaft 9, and a required pin 12 is integrally suspended on the circumference of the clutch plate 11, and the small-diameter screw The pin 12 is removably engaged with a flange 13 of the shaft 9 and a flange 15 integral with a large-diameter screw shaft 14 externally fitted on the small-diameter screw shaft 9, and the large-diameter screw shaft 14 is attached to a support tube in the support body 6. A square groove 17 is cut into the top of the small-diameter screw shaft 9 which penetrates the upper surface of the fixed seat 8, and is engaged with a screw seat 16 extending at a predetermined interval in parallel to the fixed seat 8. At the same time, the small diameter screw shaft 9 is rotated.

To explain the lifting operation of the salvage pipe 5 when it is lifted up, the small diameter screw shaft 9 is rotated by rotating the handle 18, and the large diameter screw shaft 14 is integrally rotated by the pin 12 of the clutch plate 11 to support it. The fixing seat 8 at the top is raised via the screw seat 16 integrated with the body 6, and the salvage pipe 5 is simultaneously raised via the fixing seat 8, and the stopper 19, which is engaged with the lower end of the large diameter screw shaft 14, is screwed up. When the clutch plate 11 is locked to the lower end of the screw of a predetermined length on the seat 16, the pin 12 is pushed up.
is released from the flange 15 of the large-diameter screw shaft 14 to separate the small-diameter screw shaft 9 from the large-diameter screw shaft 14, and by rotating the small-diameter screw shaft 9, the The lifting pipe 5 (as a shaft) is raised in two stages, and the propulsion shaft 3 is raised to a predetermined position.

As mentioned above, in the hoisting device of the present invention, the small diameter screw shaft 9 for raising and lowering the hoisting pipe 5 (including the large diameter threaded shaft 14) is integrated in a separate series at the top of the hoisting pipe 5, and the supporting body 6, the bending deformation of the salvage pipe 5 does not affect the screw shaft, etc. Furthermore, since the small diameter screw shaft rises after the large diameter screw shaft is locked in the upward movement, the initial stage of lifting the propulsion shaft is The bending stress applied to the salvage pipe is counteracted by the large-diameter shaft to eliminate deformation, and the device does not protrude above the stern deck during ship maneuvering, so it effectively contributes to safety and operational aspects as intended. Note that this hoisting device can also be used for hoisting a steering shaft.

[Brief explanation of drawings]

Fig. 1 is an external view of the installation of a conventional manual hoisting device, Fig. 2 is an external view of the installation of the hoisting device according to the present invention, Fig. 3 is an enlarged view taken along arrow A-A' in Fig. Figure 4 is an enlarged sectional view taken along the line B-B' in Figure 2;
FIG. 5 is an enlarged sectional view taken along the line C-C' in FIG. 3. In the diagram, 1 is the upper surface of the deck, 2 is the salvage operation section, and 3
is a propulsion shaft, 4 is a bearing, 5 is a lift pipe, 6 is a support body, 7 is a support tube, 8 is a fixed seat, 9 is a small diameter screw shaft, 10 is a bearing, 11 is a clutch plate, 12 is a pin, 13 is a flange , 14 is a large diameter screw shaft, 15 is a flange, 16 is a screw seat, 17 is a square groove, 18 is a handle, and 19 is a stopper.

Claims (1)

[Scope of utility model registration request] In a salvage device in which a propulsion shaft for a small vessel is rotatably and slidably supported at the lower end of a salvage pipe, a small-diameter threaded shaft is rotatably supported on a fixed seat integrated at the top of the salvage pipe in parallel with the salvage pipe. A large-diameter screw shaft is fitted onto the small-diameter screw shaft so that it can be freely connected to the small-diameter screw shaft, and the large-diameter screw shaft is engaged with a screw seat that integrally projects from a support body that slidably supports the salvage pipe. A propulsion shaft hoisting device characterized in that a handle is locked to a small-diameter screw shaft penetrating the upper surface of a fixed seat, and a hoisting pipe is projected to the upper surface of a deck only when the vehicle is lifted.