JP2005330087A - Floating crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floating crane capable of reliably tilting its jib, even if it is of large size, when the jib is laid down and pulled into a hull, and capable of safely pulling the jib into the hull after it is tilted. <P>SOLUTION: When the jib 3 of the floating crane 1 erected on one end of the hull 2 is tilted and laid in horizontal, the jib 3 is tilted from the hull 2 to the sea side without moving a base 4 supporting the jib 3 from one end of the hull 2. After an auxiliary platform arranged on sea receives and supports a front end 3A of the jib 3 to be laid, the base 4 is moved along a rail 8 to the other end of the hull and the jib 3 and the auxiliary platform 9 are both stored in the hull 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a floating crane.

  Conventionally, floating cranes are used for offshore crane work. The floating crane has a base fixed to the hull, a jib is pivotably mounted on the base, the rope is suspended from a pulley disposed on the jib, and the rope is wound up by a winch provided separately. Alternatively, unloading or unloading is performed by a hook that is sent out and suspended from the pulley.

  The jib is usually fixed to a base portion that supports the jib so that the jib can be swung in order to perform unloading or unloading work while standing on one end of the hull (for example, the bow side).

  However, it is desirable to lay the standing jib when towing a floating crane or during a storm.

For this purpose, a rail is laid on the hull so that the base can be moved along the hull axis of the hull, and the jib is swung from the base and laid down to accommodate the jib in the hull. A crane has already been filed. (For example, see Patent Document 1)
JP 7-179294 A (page 1-4, FIG. 4)

  Normally, it is preferable to lay the jib of a floating crane standing upright. However, if the jib arranged on one end (the bow side or the stern side) of the hull is tilted to the sea side, the floating crane becomes large. The higher the moment load on the base supporting the jib, the more dangerous.

  Also, pulling the jib into the hull while tilting to near the sea surface is also difficult to pull in smoothly because the load on the base is large.

  Furthermore, if the tilted jib is moved as it is, the hook suspended on the pulley disposed at the tip of the jib swings, which is dangerous.

  An object of the present invention is to solve the above-mentioned problems, when a jib of a floating crane is laid down and pulled into a ship body, even a large jib can be reliably tilted, and the tilted jib can be safely It is to provide a floating crane configured to be retractable into the hull.

  In order to achieve the above object, an invention according to claim 1 is a floating crane including a rail that makes a base part of a jib movable in an axis direction of a hull, and is a jib standing on one end side of the hull. When tilting and laying horizontally in the horizontal direction, the jib is tilted from the hull toward the sea without moving the base from one end of the hull, and an auxiliary trolley disposed on the sea After receiving and supporting the front end of the tie and laying the jib, the base is moved to the other end of the hull along the rail, and the jib and the auxiliary carrier are both accommodated in the hull. It is characterized by being.

  According to the invention according to claim 1 having the above-described configuration, when the standing jib is tilted to the sea side, the auxiliary carriage receives the tip of the jib. It can be tilted horizontally and pulled in as it is received by the auxiliary carrier, so that the top and bottom of the jib can be supported by the base and the auxiliary carrier, respectively, and can be securely drawn into the hull. .

  According to a second aspect of the present invention, the auxiliary boat includes a support base that supports the tip end portion of the jib and a hook storage portion that stores a hook suspended from a pulley attached to the tip end portion of the jib. It is characterized by having.

  According to the invention according to claim 2 having the above-described configuration, when the jib is tilted, the tip of the jib is supported by the support base, and the auxiliary base boat is configured to store the hook. In addition, it is possible to tilt and retract the jib.

  The invention according to claim 3 is the two rails in which the rails are laid in parallel at a predetermined interval, and the auxiliary carrier is a recess provided between the two rails on one end side of the hull. It is the structure accommodated in the trolley accommodating part which is.

  According to the invention according to claim 3 having the above-described configuration, since the auxiliary trolley is configured to be accommodated exactly in the trolley accommodating portion of the hull, the hull size is not increased more than necessary, and the appearance is excellent. It can be a floating crane with good appearance.

  According to a fourth aspect of the present invention, the auxiliary carrier is connected to the hull via a rope, and when the jib is standing, the rope is wound and the auxiliary carrier is accommodated in the housing. When the jib is laid down, the rope is unwound and the auxiliary carrier is discharged from the storage portion.

  According to the invention according to claim 4 having the above-described configuration, since the auxiliary trolley is connected to the hull, the jib tip and the hook suspended from the jib tip are securely held at the maritime position. The auxiliary carrier can be correctly arranged.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a large jib, the floating crane of the structure which can be tilted safely and reliably and can be drawn in into a ship's body can be obtained.

  When floating the jib of the floating crane and pulling it into the hull, it is possible to reliably tilt even a large jib, and to obtain a floating crane configured to safely pull the tilted jib into the hull The purpose is to tilt the jib from the hull toward the sea side without moving the jib base from one end of the hull when laying the jib standing at the bow in the horizontal direction. After an auxiliary pedestal ship arranged on the side receives and supports the tip of the jib and lays down the jib, the base moves along the rail to the other end of the hull, and the jib and the auxiliary This was realized by using a floating crane that houses both the trolley and the hull.

  Hereinafter, the Example of the floating crane which concerns on this invention is described based on FIGS. 1-3.

  FIG. 1 shows a state where a jib is erected, (a) is an overall side view of the floating crane, and (b) is a plan view of the hull as viewed from above. FIG. 2 shows the jib tilted to the sea side, (a) is an overall side view of the floating crane, and (b) is a plan view of the hull as viewed from above. FIG. 3 shows the tilted jib drawn into the hull, (a) is an overall side view of the floating crane, and (b) is a plan view of the hull viewed from above.

  As shown in FIG. 1 (a), the floating crane 1 is a device that unloads and unloads at sea by setting up a jib 3 on one end of a hull 2 and driving a hook 5 suspended up and down on the jib. It is a crane floating on the sea.

  The jib 3 is supported by the base 4 and can be tilted in the direction E in the figure. This tilting operation is performed by winding and unwinding the backstay wire 6 suspended from the tip 3A of the jib 3 by the winch 6A. The back stay wire 6 is wound around a winch 6 </ b> A via a back tower 7.

  Further, a pulley 11 is disposed at the tip 3A of the jib and the hook 5 is suspended via a wire 10, and the wire 10 is wound and operated by a winch 10A.

  As shown in FIG. 1 (b), two rails 8 are provided side by side from the bow 2 </ b> A side to the stern 2 </ b> B side on the deck of the hull 2, and the base 4 that supports the jib 3 moves along the rails 8. It has a flexible structure.

  The rails 8 are two rails arranged in parallel at a predetermined interval, and two bases 4 are slidably arranged on each rail 8. Further, left and right frames constituting the jib 3 are respectively installed on the two bases 4, and the jib 3 is integrally attached to the two left and right bases 4. Therefore, the jib 3 is movable from one end side to the other end side of the hull (for example, from the bow 2A to the stern 2B) as the base 4 moves along the rail 8. At this time, both bases 4 and 4 may be moved simultaneously, or either one of the bases 4 may be moved to move the jib 3 integrally.

  The base 4 is disposed on the bow 2A side, for example, and as shown in FIG. 2, the standing jib 3 is tilted toward the sea side. At this time, as shown in the figure, the auxiliary trolley 9 accommodated in the recessed basin accommodating portion 2D provided on the bow side is discharged to the sea. FIG. 2A is an overall side view of the floating crane tilted to the sea side, and FIG. 2B shows a plan view of the hull viewed from above.

  The auxiliary trolley 9 is connected to the hull 2 via a cable 12, and the cable 12 is configured to be wound and unwound by a winch 12A. Therefore, when the auxiliary trolley 9 in which the rope 12 is wound and accommodated in the accommodating portion 2D tilts the jib 3, the rope 12 is unwound and the auxiliary trolley 9 is It is set as the structure discharge | released from the said accommodating part 2D to the sea side.

  The auxiliary trolley 9 discharged to the sea side is constructed so as to be anchored on the sea at a position corresponding to the length of the rope 12 to be fed out, and while the jib 3 is slowly tilted, the auxiliary trolley 9 is fed out. The position can be adjusted.

  The auxiliary trolley 9 includes a support base 9A for supporting the tip 3A side of the jib 3 and a hook storage 9B for storing the hook 5 suspended from the pulley 11 attached to the tip 3A of the jib 3. In this embodiment, in order to store the four hooks 5, the hook storage portions 9 </ b> B are arranged at four locations.

  When the cable 12 is extended by a predetermined length, the auxiliary carrier 9 is positioned directly below the hook 5 and the hook 5 is stored in the hook storage portion 9B, the tip end side of the jib 3 is placed in contact with the support base 9A. It is a configuration. Since the jib 3 has a steel frame structure, the jib 3 is heavy and can be maintained in a stable posture without being displaced once placed on the support base 9A. For this purpose, the jib 3 supported by the base 4 in a swingable manner is tilted, and the base 4 is moved along the rail 8 with the tip 3 A placed on the auxiliary carrier 9. The auxiliary trolley 9 moves to the hull side together with the moving jib 3 without being displaced from the jib 3 even if it is moved in the pulling direction to the hull side.

  Of course, since the auxiliary carrier 9 is connected to the hull 2 and the rope 12, the rope 12 is loosened when the auxiliary carrier 9 is moved to the hull side. Therefore, what is necessary is just to set it as the structure which winds up the cable 12 for the slack with the winch 12A.

  When the base 4 is moved along the rail 8 and the jib 3 is pulled into the hull, the driving wire 13 including the driving unit 14 is used, and the base 4 is moved by the driving wire 13. However, a configuration may be adopted in which a driving wheel is provided directly on the base portion 4 so as to move directly on the rail, and is not particularly limited.

  FIG. 3 shows the tilted jib drawn into the hull, where (a) is an overall side view showing the tilted floating crane pulled into the hull, and (b) shows a plan view at that time. ing.

  The base 4 and the jib 3 move integrally along the rail 8 laid in parallel from the bow side to the stern side of the hull 2. At this time, the left and right frames constituting the jib 3 are configured to straddle the steering chamber 2C provided on the deck of the hull, and have a shape that does not interfere with the steering chamber 2C. The jib 3 tilted substantially horizontally can be drawn to the stern side.

  Further, when the tilted jib 3 is pulled into the hull, the backstay wire 6 suspended from the tip 3A of the jib 3 is loosened, so that the wire 6 is wound up by the winch 6A. The winding speed may be a speed at which the slack of the backstay wire 6 is eliminated, and even if the user operates the winch 6A while visually checking the slack, a member for detecting the slack of the wire is also used. It is good also as a structure which installs separately and winds up automatically, when the said slack is detected.

  As described above, the auxiliary carrier 9 is disposed, and when the tip 3A of the jib 3 is placed on the auxiliary carrier 9, the suspended hook 5 is accommodated and held in the hook accommodating portion 9B. If the hook 5 is stored in the hook storage portion 9B before the jib 3 is brought into contact with the support base 9A, the position of the auxiliary carrier 9 floating on the sea is automatically set. The hook 5 can be positioned directly below the wire 10 that is suspended. That is, the arrangement position of the auxiliary carrier 9 can be correctly aligned. Further, when the jib 3 is further tilted after the hook 5 is stored in the hook storage portion 9B, the jib 3 is placed on the support base 9A accurately.

  At this time, it is obvious that the jib 3 is tilted while winding the slack of the wire 10 that is hanging the hook 5.

  In this way, the jib 3 is pulled in the hull direction with the jib 3 correctly placed on the auxiliary trolley 9, and by driving the drive wire 13 provided with the drive unit 14, the tilted jib 3 is correctly fitted into the hull. Can be drawn into.

  When the jib 3 is tilted and pulled into the hull, the hull stabilizes, and even when waves such as storms are high, the effect can be minimized and the floating crane 1 can be towed safely. .

  When the jib 3 once accommodated in the hull is erected at the operating position, the drive unit 14 is rotated in the reverse direction to drive the drive wire 13 in the reverse direction so that the jib 3 is pushed out of the hull 2. .

  That is, the drive wire 13 provided with the drive unit 14 is configured to be capable of forward / reverse drive. For example, a winch is provided as the drive unit 14 on both the bow side and the stern side of the hull so that one drive wire 13 is provided. Or a drive unit having a configuration in which a chain is wound between opposed pulleys as in the case of chain drive.

  When the jib 3 is pushed out of the hull, the cable 12 connecting the auxiliary trolley 9 and the hull 2 and the backstay wire 6 suspended on the tip 3A of the jib 3 are loosened. Just do it. Further, the winch 12A and the winch 6A can be wound up in conjunction with the drive unit 14 so that the rope 12 and the backstay wire 6 do not loosen.

  When the jib 3 is pushed out to the sea side and the base 4 reaches the bow 2A, the driving of the driving unit 14 is stopped, and then the back stay wire 6 is wound up and the jib 3 is erected, What is necessary is just to go through the reverse process to the process of making the jib 3 line.

  Further, after the jib 3 is erected, the auxiliary trolley 9 on the sea can be accommodated in the trolley accommodating portion 2D of the hull 2 by winding up the rope 12.

  As described above, according to the present invention, even a large jib can be reliably tilted, and a floating crane having a configuration in which the tilted jib can be safely pulled into the hull can be obtained.

It is the floating crane which concerns on this invention, Comprising: The state which installed the jib is shown, (a) is the whole side view of a floating crane, (b) has shown the top view which looked at the hull from the top. . The jib is tilted to the sea side, (a) is an overall side view of the floating crane, and (b) is a plan view of the hull from above. The tilted jib is drawn into the hull, (a) is an overall side view of the floating crane, and (b) is a plan view of the hull viewed from above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floating crane 2 Hull 2A Bow 2B Stern 2C Steering room 2D Cargo storage part 3 Jib 3A (jib) tip part 4 Base 5 Hook 8 Rail 9 Auxiliary base 9A Support stand 9B Hook storage part 12 Search

Claims (4)

A floating crane having rails that allow the base of the jib to move in the direction of the hull axis,
When tilting the jib standing on one end of the hull and laying it horizontally, the jib tilts toward the sea side from the hull without moving the base from one end of the hull, and After an auxiliary pedestal ship arranged on the side receives and supports the tip of the jib and lays down the jib, the base moves along the rail to the other end of the hull, and the jib and the auxiliary A floating crane characterized in that both a trolley and a hull are accommodated in a hull.   The auxiliary pedestal ship includes a support base for supporting the tip end portion of the jib and a hook storage portion for storing a hook suspended from a pulley attached to the tip end portion of the jib. The floating crane according to claim 1.   The rails are two rails laid in parallel at a predetermined interval, and the auxiliary trolley is accommodated in a trolley accommodating portion which is a recess provided between the two rails on one end side of the hull. The floating crane according to claim 1, wherein the floating crane is configured as described above. The auxiliary trolley is connected to the hull via a cable,
When the jib is erected, the rope is wound up and the auxiliary carrier is accommodated in the accommodating portion,
The floating crane according to any one of claims 1 to 3, wherein when the jib is laid down, the rope is unwound and the auxiliary carrier is discharged from the accommodating portion.

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