JPH07102957B2 - Lifting equipment for boats - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small boat, and in particular, a boat lifting device suitable for pulling up and moving a leisure boat or yacht anchored at a river mouth or a marina from the sea and pulling a retracted boat down to the sea. It is about.

[0002]

2. Description of the Related Art With the spread of marine leisure, the number of boats moored at river mouths and marinas has been increasing year by year. Especially in recent years, the number of boats that have been moored in estuaries and harbors other than the designated areas has increased significantly, and these boats have significantly hindered the comings and goings of fishing boats. The shellfish adhere to the shellfish, which requires a lot of cost and labor for maintenance during use.

For this reason, at a marina or a river mouth where many boats are anchored, a hoisting device for hoisting and storing a boat that is rarely used has been developed. As this hoisting device, that is, a conventional device for handling cranes of boats, a jib type crane, which is widely used in other fields, and two slings are disclosed in Japanese Patent Application Laid-Open No. 1-226695. There is a gantry type crane equipped.

[0004]

However, when a normal jib type crane is used to lift and lower a boat,
Suspend two slings for hoisting a boat on one lifting hook, and spread the two slings downward and forward. In this state, place one sling on the front side of the boat and the other one. It is necessary to position it on the rear side and wind it on the bottom of the boat in a well-balanced manner. Since this work must be done while the boat is floating above the sea, the winding of the first sling can be performed relatively easily, but the mounting of the second sling is extremely difficult. However, it takes a lot of time and labor to equip the boat with the two slings in good balance. In addition, when the boat is hoisted after the sling is attached, the boat is hoisted with a single wire rope from the jib, so the hoisted boat turns indefinitely in the horizontal direction, and further labor is required to regulate its posture.

Such inconvenience is caused by the above-mentioned JP-A-1-226.
As in the handling crane proposed by Japanese Patent No. 695, two parallel booms are extended from the swing frame provided on the post with a space larger than the lateral width of the boat, and two slings are provided between the booms. This can be improved by providing a lifting device that can be lifted and lowered, but when using this handling crane, for example, when a boat is hoisted from the sea, the boat on the sea is projected at right angles to the quay and toward the sea. It is very difficult to guide the boat between the two booms when there is a flow along the quay such as an estuary as well as a high level operation technique is required. Is.

The present invention has been made for the purpose of eliminating the above-mentioned inconveniences in the conventional hoisting device for a watercraft.

[0007]

According to the present invention, a turn beam that is horizontally rotatable with respect to a hanging beam is provided on the lower surface of a hanging beam that is suspended from a trolley hoist of a jib type crane by a wire rope. The above problem is solved by arranging a sling on the turn beam so that the suspension beam can be raised and lowered and the turn beam can be rotated in addition to the lateral movement operation by the jib and the trolley hoist. .

That is, in the hoisting and lowering device for a watercraft according to the present invention, a trolley hoist is provided on a jib of a jib type crane having a horizontally extending jib so that the trolley hoist can travel along the jib. A suspension beam is suspended through a rope, and a turn beam that is horizontally rotatable with respect to the suspension beam is attached to the lower side of the suspension beam, and two slings are attached to the turn beam at intervals. It is characterized by that.

Further, a plurality of pin shafts for sling engagement for changing the engagement position of the sling are provided in parallel on the lower surface of the turn beam for engaging the two slings. That is, the widening width of the sling hanging in a U shape can be selected according to the size of the width of the boat.

As means for rotatably mounting the turn beam on the lower surface of the suspension beam , for example , a ring member is fixed to the upper surface of the turn beam and the ring member is supported on the suspension beam so that the ring member can freely rotate. Further, a ring gear is provided on the inner surface side of the ring member to form a ring rack, the pinion is engaged with the ring beam from the suspension beam side, and the pinion is rotated from the suspension beam side to turn the suspension beam. The beam may be rotated horizontally.

Further, as a means for making it possible to select the widening width (opening width) of the sling hanging down in a U-shape corresponding to the size of the lateral width of the boat, for example, in the case where the turn beam is rectangular, it is on the diagonal line. It is desirable that the pin shafts for engaging the sling are arranged side by side at a position from the outermost end in parallel, and the opening width of the sling becomes large when the space between the two slings is widened. It is more convenient to attach a hook metal fitting for sling attachment to the pin shaft.

[0012]

[Operation] A jib crane equipped with a trolley hoist on the jib is designed to move a hanging beam and a turn beam suspended by wire rope up and down or turn to suspend a boat suspended from a sling of the turn beam from the sea to the land, or from the land. The original function of the crane is to transfer it to the sea.
Then, the turn beam determines the suspension position of the sling according to the size of the boat, and in addition to the direction change by the crane, it rotates with respect to the suspension beam to change the sling direction independently, for example, from the sea. When landing, make the sling stand by corresponding to the approaching direction of the boat, facilitate the approaching of the boat in the front and rear two slings, facilitate the suspension work of the two slings, and ensure the safety by the combined operation with the above crane. In addition, the boat is lifted and lowered quickly.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Explained below with reference to the drawings showing the embodiments of the present invention, FIG. 1 is a side view of the entire lifting device installed on the quay A of a river mouth, and FIG. 1 is a front view of a main part, where 1 is a post of a jib type crane, 2 is a jib which can be horizontally swiveled on the post 1, and 3 and 3 are trolleys movable along the jib. Hoists, 4 and 4 are wire ropes which are wound around a trolley hoist and are hung, and 5 is a suspension beam which is hung from this wire rope.

According to the present invention, as described above, the jib 2 of the jib type crane is provided with the trolley hoists 3 and 3 so as to be able to travel along the jib 2, and the trolley hoists 3 and 3 through the wire ropes 4 and 4. A turn beam 6 which is horizontally rotatable with respect to the suspension beam 5 is mounted on the lower surface side of the suspended suspension beam 5, and two slings 7 and 7 are attached to the turn beam 6 at intervals. Be worn.

In this embodiment, the connecting structure of the suspension beam 5 and the turn beam 6 is such that the outer ring member 8 is fixed to the lower surface of the suspension beam 5 as shown in FIGS. An inner ring member 10 having a gear 9 on the inner surface side is fixed to the upper surface of 6 to fix the inner ring member 10 in the outer ring member 8 through a large number of balls 11 or roll bearings 12, 12 as shown in FIG. The inner ring member 10 and the outer ring member 8 are fitted into each other via a bearing so as to support the turn beam 6 rotatably in the horizontal direction with respect to the suspension beam 5. A motor M having a deceleration function is provided on the upper surface of the suspension beam 5, and a pinion 13 that meshes with the gear 9 forming the ring rack is provided from the motor M via a worm and a worm wheel. The rotation of the motor M on the suspension beam 5 side is controlled, and the pinion 13
The turn beam 6 can be rotated in a desired direction with respect to the suspension beam 5 by rotationally driving.

On the lower surface side of the turn beam 6, there is provided a pin shaft for engaging the slings 7, 7. In the present embodiment, the turn beam 6 has a rectangular shape, and on the lower surface thereof, a shaped steel material 1 extending in a diagonal direction as shown in FIG.
4, 15 are fixedly arranged, and a plurality of pin shafts 16 for engaging the slings 7, 7 in the groove portions of the die steel materials 14, 15 are provided.
17 are arranged side by side with a space from the outside, and hooks 18, 18 on both ends of the slings 7, 7 are connected to arbitrary pin shafts 16,
By engaging with 17, it becomes possible to change the opening width W of the slings 7, 7 and the distance D between the slings 7, 7 depending on the lateral width of the hoisting boat 20. ing. FIG. 7 shows a state where one end hook 18 of the sling 7 is engaged with the pin shaft 16.

Next, the landing operation procedure of the boat 20 of the hoisting device of the present invention constructed as described above will be described.
First, check the size of the boat to be landed, and if the boat 20 is large, attach the slings 7 and 7 using the left and right pin shafts 16A and 17A on the lower side of the turn beam 6 with a large width interval. When the boat 20 is small, the slings 7 and 7 are attached using the left and right pin shafts 16B and 17B on the inner side of the lower surface of the turn beam 6 having a small width interval.

Next, the push button of the operation box 21 of the hoisting device is operated to rotate the jib 2 to move the suspension beam 5 from the quay toward the watercraft, and then the motor M is drive-controlled. The turn beam 6 is rotated, and the suspension beam 5 is lowered by aligning the U-shaped opening surface of the suspended slings 7 and 7 with the direction of travel of the boat, and the slings 7 and 7 are submerged in water to sink the slings 7 and 7. 20 boats between U-shaped openings
After that, the boat is guided between the openings of the slings 7, 7 and the boat is positioned in a well-balanced manner on the front and rear slings 7, 7.

After that, the operating box 21 is operated to pull up the suspension beam 5 to suspend the boat 20, and the jib 2
Swivel to land, move it to a predetermined location and position it above a storage stand (not shown).
Drive control is performed to align the boat with the storage base, and the boat is lowered and placed on the storage base to complete the landing of the boat. When transporting a boat in storage at land, the reverse of the above procedure may be performed.

[0020]

As described above, in the hoisting and lowering device of the present invention, the trolley hoist 3 is allowed to travel along the jib 2 on the jib 1 of the jib type crane having the one jib 1 extending in the horizontal direction. A suspension beam 5 is provided from the trolley hoist 3 via a wire rope 4, and a turn beam 6 which is horizontally rotatable with respect to the suspension beam 5 is attached to the lower side of the suspension beam 5. Since the two slings 7 and 7 are attached to the beam 6 with a space therebetween, the suspension beam 5 and the turn beam 6 suspended by the wire rope 4 according to the operation procedure of the conventional jib type crane, Not only can the boat 20 suspended by the sling 7 of the turn beam 6 by moving up and down or turning, be transferred from sea to land and from land to sea, but also the size of the boat 20. Correspondingly it is possible to determine the fastening position of the sling 7.

Further, in addition to the direction change by the above-mentioned crane, the direction of the sling 7 can be changed independently by rotating the turn beam 6 with respect to the suspension beam 5, so that, for example, at the time of landing from the sea If the sling 7 is made to stand by in accordance with the approaching direction, the boat 20 can smoothly enter the two front and rear slings 7 and 7, and the hooks on both ends of the two slings 7 and 7 can be secured. Same as type steel
By engaging with fixed pin shafts 16 and 17
Then, depending on the size of the width of the boat to be lifted,
Change the opening width W and the spacing D of the lower slings 7, 7.
It is possible to carry out suspension work on a boat quickly and easily.
You can In addition, the suspension beam 5 is rotated horizontally.
The turn beam 6 movably supported is the inner ring member 1
0 and the outer ring member 8 are fitted in a bearing shape
Therefore, since it is supported by the surface, it also has a large width and length.
It is also possible to handle suspended objects during turning.
Less swaying and shaking, and the bearing side
Since the gear is large, a large reduction gear ratio can be obtained,
A low turning speed is obtained by adjusting to the inverter control of the motor.
be able to.

[Brief description of drawings]

FIG. 1 is a side view of an entire lifting device.

FIG. 2 is a front view showing the main part of the apparatus.

FIG. 3 is a partial cross-sectional view showing a combined state of a suspension beam and a turn beam.

FIG. 4 is a partial cross-sectional view showing another connection state of the suspension beam and the turn beam.

FIG. 5 is a partial side view of a suspension beam and a turn beam.

FIG. 6 is a bottom view of a turn beam.

FIG. 7 is a front view of a hook engaging pin shaft portion of the sling.

[Explanation of symbols]

 1 post 2 jib 3 trolley hoist 4 wire rope 5 suspension beam 6 turn beam 7 sling 16 pin shaft 17 pin shaft 20 boat

Claims (1)

[Claims] 1. A trolley hoist is provided on a jib of a jib type crane having one horizontally extending jib so that the trolley hoist can travel along the jib, and a suspension beam is suspended from the trolley hoist via a wire rope. Under the hanging beam
Inner ring member with outer ring member fixed to the surface and gears on the inner surface side
Is fixed to the upper surface of the turn beam, and the inner ring member is
Bearings inside the outer ring member via roll bearings
The turn beam is horizontally aligned with the hanging beam by fitting to
A motor that is rotatably supported on the upper surface of the hanging beam.
The pinion rotated by the gears of the inner ring member.
Mating and fixing the shape steel material to the bottom surface of the turn beam in an X shape on the bottom
And a plurality of locks for locking the sling to the die steel.
Pin shafts are installed side by side at a specified interval to reduce the width of the boat.
Corresponding U-shaped sling opening width and gap
A hoisting device for boats, characterized in that the distance can be changed.