JP2005075164A - Rudder plate mounting/removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rudder plate mounting/removing device capable of easily mounting/removing the rudder plate from a hull in a short time without damaging the rudder plate and the hull, etc. <P>SOLUTION: When removing the rudder plate 104 in this rudder plate mounting/removing device 10, the position of a frame 14 is adjusted to a position where the rudder plate 104 can be held by moving arms 34 and crawler cranes 40. The rudder plate 104 is separated from the hull 100 by moving the arms 34 and the crawler cranes 40 after adjusting a space of plates 12 for holding the rudder plate 104 and holding a side surface of the rudder plate 104. When mounting the rudder plate 104, a shaft 108 and a pintle are mounted after adjusting the position of the frame 14 to a position where the mounted rudder plate 104 is mounted by moving the arms 34 and the crawler cranes 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rudder plate attaching / detaching device for attaching and removing a rudder plate when inspecting and repairing engine system parts of a ship.

  Ships are legally inspected and repaired for engine parts such as engines, propeller shafts, propellers, and couplings once every five years. This inspection is conducted at the dry dock, and is conducted under the guidance of an inspection engineer during the period from entry to departure.

  FIG. 4 is a perspective view showing a conventional steering plate installation and removal operation. The hull 100 is fixed to the dry dock by a plurality of blocks 102, 102 (only one block is shown in FIG. 4). Yes. The rudder plate 104 is swingably connected to a ladder horn 106 provided at the tail end of the hull 100 via a shaft 108, and a propeller 110 is provided in front of the rudder plate 104. The propeller 110 is removed from the hull 100 after the rudder plate 104 is removed from the hull 100.

  The procedure for removing the rudder plate 104 is shown below.

(I) A plurality of suspension pieces 120, 120... Are welded to the lower surface of the hull 100 and the upper surface of the rudder plate 104.

(II) Hanging pieces 120, 120 of the hull 100 and hanging pieces 120, 1 of the rudder plate 104
.. Are connected by a plurality of chain blocks 122, 122.

  (III) The shaft 108 is pulled out from the inside of the hull 100, and the rudder plate 104 is suspended by a plurality of chain blocks 122, 122.

(IV) Lowering the rudder plate 104 to the bottom of the dry dock while adjusting the length of the plurality of chain blocks 122, 122.

  (V) The rudder plate 104 is placed on a carriage and conveyed to a maintenance place of the rudder plate 104.

The removal operation of the rudder plate 104 is thus completed. The installation work of the rudder plate 104 is (I)
To (V) are performed in the reverse order, and finally the welded suspension pieces 120 and 12 are welded.
The work is completed by removing 0 ... and painting this part.

  By the way, when a large-scale ship having a displacement of 10,000 tons is used, the rudder plate is large and heavy, and therefore, the operations (IV) and (V) require a lot of time and labor.

  Conventionally, various methods have been implemented as attaching and removing a rudder plate in a large vessel, but as described above, a method of using a plurality of chain blocks and cranes is generally used. In addition, a method of carrying an upright rudder plate so as to be sandwiched on the carriage and a method of carrying it after supporting the upright rudder plate in the vicinity of the installation place with a support column have been proposed.

Moreover, after lifting the rudder plate using the auxiliary trolley of the Goliath crane, a work method is proposed in which a rudder plate balance is set on the main trolley and the load on the rudder plate is moved to this rudder plate balance (for example, Patent Document 1). According to this working method, a process of temporarily placing the rudder plate on the ground or setting a dedicated device or member on the rudder plate is unnecessary, so that work time, cost and equipment cost can be reduced.
JP-A-60-203593

  However, in the conventional work method using a chain block or a crane, for example, when 4 to 5 workers engage a rudder plate of about 15 tons, it takes about 6 days to install and remove it. . In addition, this working method has a problem that the rudder plate collides with the hull when descending and the rudder plate and the hull are damaged because the rudder plate is lowered in an unstable state.

  In addition, in the conventional working method using a carriage and a support member, a device and a member dedicated to the installation of the rudder plate are necessary, so that it requires equipment cost and equipment space, and until the rudder plate is set on the carriage and the support column. There was a drawback of requiring a process and time.

  Furthermore, in the rudder plate mounting method of Patent Document 1, since there are many operations for adjusting the position of the rudder plate in the air, it tends to be unstable, and the work procedure is complicated, so that a high level of skill is required for the workers engaged. There was a point.

  The present invention has been made in view of such circumstances, and when attaching and removing a rudder plate from a hull, the rudder can be easily performed in a short time without damaging the rudder plate or the hull. An object of the present invention is to provide a plate attaching / detaching device.

  Claim 1 of the present invention is a rudder plate attaching / detaching device used for attaching and removing a rudder plate provided in a hull of a ship, in order to achieve the above object, and a traveling cart and the traveling cart And a pair of rudder plate sandwiching plates that are erected on the gantry and are provided so that the distance between them can be changed.

  According to the first aspect of the present invention, when removing the rudder plate from the hull, first, the pair of rudder plates can be moved to the lower position of the rudder plate by first moving the traveling carriage so that the pair of rudder plate clamping plates can hold the rudder plate. Position the clamping plate. Next, the platform is raised by the elevating mechanism, and the elevation of the platform is stopped when the platform contacts the lower part of the steering plate. Next, the pair of rudder plate clamping plates are moved toward each other, and the rudder plate is clamped by the pair of rudder plate clamping plates. Thereafter, when the rudder plate is removed from the hull, the rudder plate is stably supported by the gantry while being sandwiched between the pair of rudder plate clamping plates. Then, by lowering the gantry, the rudder plate can be recovered from the hull. When the gantry is located at the lowest position, the rudder plate is transferred to the maintenance place by the traveling carriage. As a result, a series of rudder plate removal operations can be carried out easily and in a short time without damaging the rudder plate or the hull.

  On the other hand, when the rudder plate is attached to the hull, the gantry is lifted by the lifting device while the rudder plate is sandwiched between the pair of rudder plate clamping plates, and the rudder plate is positioned at the hull attachment position. In this state, the rudder plate is fixed to the hull by the rudder plate attaching / detaching device. As a result, a series of rudder plate mounting operations can be carried out easily and in a short time without damaging the rudder plate or the hull.

  According to the invention described in claim 2, since the plate height variable mechanism is provided on the steering plate clamping plate, the height of each steering plate clamping plate is adjusted according to the size of the steering plate. Can do. Therefore, the rudder plates having different sizes can be stably held.

  According to the third aspect of the present invention, the height of the steering plate clamping plate can be adjusted by moving the lifting plate up and down with respect to the fixed plate by the cylinder device. Can be adjusted stably.

  According to the invention described in claim 4, in the steering plate removal work, if the center of gravity of the steering plate held on the mount of the steering plate mounting / dismounting device is shifted from the center of gravity of the steering plate mounting / dismounting device, There is a risk that an uneven load is applied to the traveling carriage of the rudder plate attaching / detaching device, and the rudder plate attaching / detaching device falls.

  Therefore, after the rudder plate is clamped by the rudder plate clamping plate and the shaft is removed, the load applied to the four corners of the traveling carriage of the rudder plate attaching / detaching device is measured by the load measuring means, and the measured value is removed by attaching the rudder plate. It outputs to the position adjustment means provided in the apparatus. In the position adjusting means, the pedestal or the steering plate clamping plate is moved based on the measured value so that the center of gravity of the steering plate coincides with the center of gravity of the steering plate attaching / detaching device. Thereby, while being able to raise / lower the clamped steering plate stably, it can convey stably.

  As described above, in the steering plate mounting / removal device according to the present invention, a pair of steering plate clamping plates, a frame having a lifting mechanism, and a traveling carriage are provided, and each device is moved to clamp the side surface of the steering plate. Thus, a series of rudder plate attachment and removal operations can be easily and quickly performed without damaging the rudder plate or the hull.

  Further, by providing a plate height variable mechanism that can adjust the height of the steering plate clamping plate according to the size of the steering plate, more stable steering plate installation and removal operations can be performed.

  Furthermore, by providing a position adjusting means that adjusts the position of the rudder plate that is clamped by measuring the load applied to the four corners of the traveling carriage, the rudder plate clamping plate can be moved up and down stably and transferred stably. can do.

  A preferred embodiment of a steering plate mounting / removal device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a schematic configuration of a steering plate attaching / detaching device 10 according to a first embodiment of the present invention, and is an example in which an extension plate is provided as a plate height variable mechanism.

  As shown in FIG. 1, the steering plate attaching / detaching device 10 mainly includes a pair of steering plate clamping plates 12, 12, a gantry 14, a traveling carriage 16, and a controller 18.

  The rudder plate clamping plate 12 is provided in a state where an extension plate 26 is connected to a fixed plate 24 upright on the upper surface of the gantry 14 by a plurality of folding members 28, 28. The plate height adjusting mechanism is provided so that the extension plate 26 stands upright or refracts.

  The gantry 14 has a shape and material on which the rudder plate 104 of the hull 100 can be placed, and is an XY table that can be moved back and forth and left and right by an attached X direction motor (not shown) and a Y direction motor (not shown). Is preferred. The steering plate clamping plates 12, 12 are connected to the upper surface of the gantry 14 via a pair of screws 30, 30. By driving a motor (not shown) attached to the screws 30, 30, 30 rotates and each steering plate clamping plate 12, 12 moves in the horizontal direction.

  Between the gantry 14 and the traveling carriage 16, four arms 34, 34... That are lifting mechanisms are provided. The arm 34 is made of a material and a shape capable of withstanding the weight of the mounted rudder plate 104, and has a shaft 38, which intersects with links 36, 36... Provided on the lower surface of the gantry 14 and the upper surface of the carriage 32 in the front-rear direction. 38... And if the hydraulic cylinder (not shown) attached to the front arms 34 and 34 is operated, the mount 14 will move up and down.

  The traveling carriage 16 travels on an endless track of crawler cranes 40, 40 provided on the lower surface, and includes four outriggers 42, 42. The outriggers 42, 42... Are devices for moving the attached jacks (not shown) to fix the steering plate attaching / detaching device 10 in a predetermined place. Each of the outriggers 42, 42... Has a built-in load cell (not shown) as load measuring means, and measures the load applied to the outriggers 42, 42. The load measuring means is not limited to the load cell provided inside the outrigger, and strain gauges are provided at the four corners of the main body frame (not shown) of the traveling carriage 16 to convert the distortion of the main body frame. The loads applied to the four corners of the traveling carriage 16 may be measured.

  The controller 18 is provided on the upper surface of the traveling carriage 16, and includes folding members 28, 28..., Screws 30 and 30, an X direction motor (not shown) and a Y direction motor (not shown) of the gantry 14, and an arm 34. , 34... Are connected to hydraulic cylinders (not shown), crawler cranes 40, 40, outriggers 42, 42, and load cells (not shown), and the movement of the steering plate attaching / detaching device 10 is operated and controlled. The

  Next, the operation of the steering plate mounting / removal device 10 according to the first embodiment of the present invention described above will be described.

  FIG. 2 is a perspective view showing a state in which the rudder plate 104 is clamped by the rudder plate attaching / detaching device 10 according to the first embodiment of the present invention.

  In the operation of removing the rudder plate 104, first, the crawler cranes 40, 40 of the traveling carriage 16 are moved to move the rudder plate attaching / detaching device 10 to below the rudder plate 104. At this time, it is necessary to be careful that the rudder plate attaching / detaching device 10 does not come into contact with the hull 100, the ladder horn 106, and the propeller 110. Then, the arms 34, 34... And the crawler cranes 40, 40 are moved until the rudder plate 104 is placed on the upper surface of the mount 14 at a position where the rudder plate clamping plates 12, 12 can be held. Thereafter, the outriggers 42, 42... Are driven to fix the steering plate attaching / detaching device 10. Thereby, the removal operation | work of the steering plate 104 can be started easily and in a short time.

  Next, when each screw 30, 30 is moved and each rudder plate clamping plate 12, 12 is moved in the horizontal direction and adjusted to an interval for clamping the side surface of the rudder plate 104, the rudder plate 104 is attached to the rudder plate. .. Are stably fixed by the steering plate clamping plates 12, 12. Thereby, the operation of removing the shaft 108 and the hull (not shown) can be performed reliably, and the rudder plate 104 can be prevented from coming into contact with the hull 100 and the rudder horn 106 due to the reaction during the removal.

  After the shaft 108 and the hull are removed, the outriggers 42, 42,. Then, the arms 34, 34... And the crawler cranes 40, 40 are moved so as not to contact the hull 100 and the ladder horn 106, and the rudder plate 104 is recovered from the hull 104 for the gantry 14. Thereafter, the arms 34, 34... Are moved to lower the gantry 14, and then the crawler cranes 40, 40 are moved to move the rudder plate 104 to the maintenance place. Thereby, the rudder plate 104 can be stably removed and transferred without damaging the rudder plate 104, the hull 100, and the like.

  From the above, in the steering plate attaching / detaching device 10, by moving the pair of steering plate clamping plates 12, 12, arms 34, 34, crawler cranes 40, 40 and outriggers 42, 42 by operating the controller 18, Since the rudder plate 104 can be pinched, moved up and down via the gantry 14, the rudder plate 104 can be easily and quickly removed without damaging the rudder plate 104 and the hull 100. it can.

  On the other hand, in the operation of attaching the rudder plate 104 to the hull 100, first, the rudder plate attaching / detaching device 10 holding the rudder plate 104 on the gantry 14 is moved by the traveling carriage 16 to a position below the attaching position of the rudder plate 104. Next, the arms 34, 34... And the crawler cranes 40, 40 are moved so as not to contact the hull 100 and the ladder horn 106, and the gantry 14 is moved up and down to a position where the rudder plate 104 is attached to the hull 100 and the ladder horn 106. Move. Thereafter, the steering plate attaching / detaching device 10 is fixed by the outriggers 42, 42. At this time, since the rudder plate 104 is stably fixed by the rudder plate attaching / detaching device 10, the operation of attaching the shaft 108 and the ship needle (not shown) to the rudder plate 104 can be performed accurately.

  After the rudder plate 104 is attached, the rudder plate 104 is released from the rudder plate attaching and detaching device 10 when the rudder plate clamping plates 12 and 12 are spaced apart. Then, the arms 34, 34... And the crawler cranes 40, 40 are moved to move the rudder plate attaching / detaching device 10 to complete.

  By the way, there are various shapes and sizes of the rudder plate 104 provided in the ship, and in the case of the rudder plate 104 that is much higher than the rudder plate clamping plates 12 and 12 of the rudder plate attaching / detaching device 10, Since it cannot be clamped, the rudder plate 104 tends to become unstable. Therefore, each of the steering plate clamping plates 12 and 12 is composed of the fixing plates 24 and 24, the extension plates 26 and 26, the folding members 28 and 28, and when the steering plate 104 is long, the folding members 28 and 28. When the pulling extension plate 26 stands upright on the upper surface of the fixed plate 24, the position where the rudder plate clamping plates 12 and 12 are extended and pinched increases, so that even the high rudder plate 104 is stable. And can be pinched.

  Further, the larger the difference between the center of gravity of the steering plate 104 and the center of gravity of the steering plate attaching / detaching device 10 when the steering plate is sandwiched by the steering plate clamping plate 12, the greater the amount of unbalanced load applied to the traveling carriage 16. If the unbalanced load is large, the rudder plate mounting / removal device 10 may fall out of balance due to the weight of the rudder plate 104 and fall down. In order to hold the rudder plate 104 so that the respective centers of gravity coincide with each other, it takes a lot of time to adjust the position of the rudder plate attaching / detaching device 10.

  Therefore, the load applied to each outrigger 42, 42,... Is measured by a load cell (not shown) as load measuring means and transmitted to the controller 18, and the position provided in the controller 18 based on the transmitted measurement value. By adjusting the position of the gantry 14 by moving each device with the adjusting means, the center of gravity of the rudder plate 104 on the gantry 14 can be accurately matched. That is, when the center of gravity of the rudder plate 104 is deviated from the center of gravity of the rudder plate attaching / detaching device 10, the controller 18 controls each of the rudder plate clamping plates 12, so that the measured values of the load cells (not shown) match. 12, the X direction motor (not shown) and the Y direction motor (not shown) of the gantry 14, and the arms 34, 34, etc. are moved to adjust the position of the gantry 14, so that the rudder plate 104 can be moved up and down stably. Can be transferred.

  FIG. 3 is a perspective view showing a schematic configuration of a steering plate mounting / removing device 50 according to the second embodiment of the present invention, and is an example in which a cylinder device is used as a height variable mechanism.

  As shown in FIG. 2, the structure of the steering plate mounting / removal device 50 is substantially the same as that of the steering plate mounting / removing device 10 according to the first embodiment of the present invention shown in FIG. The sandwiching plate 12 includes fixed plates 24, 24, elevating plates 46, 46, and cylinder devices 48, 48.

  A part of the elevating plate 46 is fitted into a groove (not shown) provided in the fixed plate 24, and is assembled so as to elevate in the vertical direction. A plurality of cylinder devices 48, 48, which are plate height variable mechanisms, are provided below the elevating plate 46.

  In the operation of attaching and removing the rudder plate 104, when the height of the rudder plate 104 is high, the rudder plate 104 is likely to be unstable unless the position where the rudder plate holding plates 12 and 12 are sandwiched is high. In that case, the cylinder devices 48, 48... Are extended to raise the lift plates 46, 46. On the other hand, when the rudder plate 104 is short, the cylinder devices 48, 48... Thereby, since the height of the steering plate sandwiching plates 12, 12 can be adjusted stably, the steering plates 104 having different sizes can be held and held at the optimum positions.

  In addition, in the steering plate attaching / detaching devices 10 and 50 described above, the number, shape, material, and the like of each member and device are not particularly limited.

  Further, in the ship used in the past and the present invention, the number, shape, and configuration of the hull 100, the rudder plate 104, the ladder horn 106, and the propeller 110 are not particularly limited.

  Furthermore, although the crawler cranes 40, 40 and the outriggers 42, 42... Are provided on the traveling carriage 16, it is not particularly limited. Wheels may be used as long as the structure can run forward and backward, right and left and can withstand the weight, and the outriggers 42, 42... May be omitted if a brake that can be firmly fixed is provided.

The perspective view which showed schematic structure of the steering plate attachment / detachment apparatus which is the 1st Embodiment of this invention The perspective view which showed the state which clamped the steering plate in the steering plate attachment / detachment apparatus which is the 1st Embodiment of this invention. The perspective view which showed schematic structure of the steering plate attachment / detachment apparatus which is the 2nd Embodiment of this invention. The perspective view which showed the installation and removal operation | work of the steering plate in the past

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,50 ... Rudder plate attaching / detaching device, 12 ... Rudder plate clamping board, 14 ... Mount, 16 ... Traveling carriage, 18 ... Controller, 24 ... Fixed plate, 26 ... Extension plate, 28 ... Folding member, 30 ... Screw , 34 ... arm, 36 ... link, 38 ... shaft, 40 ... crawler crane, 42 ... outrigger, 46 ... lift plate, 48 ... cylinder device, 100 ... hull, 102 ... wood block, 104 ... rudder plate, 106 ... ladder horn 108 ... shaft 110 ... propeller 112 ... propeller shaft 120 ... hang piece 122 ... chain block

Claims (4)

A rudder plate attaching / detaching device used for attaching and removing a rudder plate provided on the hull of a ship,
Traveling cart,
A platform provided on the traveling carriage via a lifting mechanism;
A rudder plate attaching / detaching device, comprising: a pair of rudder plate clamping plates which are erected on the gantry and are provided so that the distance between them can be changed.   The steering plate attaching / detaching device according to claim 1, wherein the steering plate clamping plate is provided with a plate height variable mechanism. The steering plate clamping plate is
A fixing plate provided on the mount;
The lifting plate is connected to the fixed plate so as to be movable up and down.
The rudder plate attaching / detaching device according to claim 2, wherein the plate height varying mechanism is a cylinder device that raises and lowers the elevating plate. A plurality of load measuring means for measuring loads applied to the four corners of the traveling carriage;
The position adjusting means for adjusting the position of the pair of rudder plate clamping plates with respect to the pedestal based on the loads measured by the plurality of load measuring means. The rudder plate installation / removal device according to any one of the above.

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