JP2011068441A - Bridge-shaped crane for quay and transport method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quay crane having a structure capable of easily and safely reconnecting a back stay in a short time when returning a brought-down mast and a transport method of this quay crane, and to restrain carrying cost of the quay crane, in the quay crane having the back stay while lowering the whole height by a mechanism for bringing down the mast. <P>SOLUTION: In this bridge-shaped crane 1 for a quay for handling a cargo of a marine transport container, a rail structure 10 is arranged in an upper part of a machine room 8, and the rail structure 10 has a traveling rail 11 and a carriage 14 movably arranged along the traveling rail 11, and the back stay 2 is composed of an upper back stay 2a and a lower back stay 2b with a separation part in the vicinity of the machine room as a boundary, and the carriage 14 is connected under the upper back stay 2a. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  [Technical Field] The present invention relates to a quay crane having a structure capable of lowering the overall height of a quay bridge crane (quay quay crane) for handling a marine transportation container by lowering a mast, and a method of transporting the quay crane. It is.

  At a container terminal in a port, a container between a ship and a trailer is handled by a quay bridge crane (hereinafter referred to as a quay crane) or a portal crane. FIG. 6 shows an example of a quay crane.

  The quay crane 1X includes a pair of sea-side legs 7a and land-side legs 7b, a sea-side leg tie beam 7c that connects the sea-side legs 7a, and a leg 7 that includes a land-side tie beam 7d that connects the land-side legs 7b. A girder 5 (land side) suspended in the lower part of the leg tie beams 7c and 7d and extending in the horizontal direction, a boom 6 (sea side) coupled to the girder 5 by a boom-up mechanism 24 constituted by a hinge pin, A mast 3 (also referred to as an A frame) standing above the side leg tie beam 7c and a mast support diagonal member 22 for supporting the mast 3 are provided. In addition, the girder 5 and the boom 6 may be configured by one or may be configured by two.

  Moreover, it has the fore stay 30 and the backstay 2X which support the girder 5 and the boom 6 with tension | tensile_strength. The fore stay 30 and the back stay 2X are configured by connecting a plurality of long steel materials in series via a link or the like.

  For example, the quay crane 1 </ b> X unloads the container 35 mounted on the container ship 32 with the trolley 31 and performs a cargo handling operation for mounting on the trailer 33. The quay crane 1 </ b> X can perform a cargo handling operation while moving along the quay 34 by the traveling device 38.

  The boom 6 has a boom up mechanism 24 for preventing interference with the bridge of the container ship 32. This is a mechanism that prevents the boom 6 and the bridge from interfering with each other by jumping up the boom 6 (indicated by a broken line) when the container ship 32 is berthing.

  In addition, a machine room 8 is installed in the upper part of the girder 5. Inside the machine room 8, large equipment necessary for the crane 1X, such as a wire drum for controlling the trolley 31 and handling cargo, is installed. is doing. Reference numeral 37 denotes a water surface.

  Here, the quay crane includes an unloader, a loader, and a general-purpose crane in addition to the container crane shown in FIG.

  By the way, this quay crane 1X is assembled at a factory or the like, tested, and then carried by a transport ship and installed on a quay such as a harbor (for example, see Patent Document 1). In many cases, a bridge is built at the entrance of the harbor or the like, and a transport ship carrying the quay crane 1X passes under the bridge and carries the quay crane 1X to a container terminal in the bay.

  However, in recent years, the container ship 32 has been increased in size for the purpose of improving the transport efficiency of marine transport containers, and accordingly, the quay crane 1X has also been increased in size. Especially in the case of a large crane, there is a crane whose height of the highest part of the mast 3 reaches 70 to 80 m above the ground. For this reason, it has become difficult for a transport ship carrying the large quay crane 1X to pass under the bridge.

  In this way, in places where there is a height restriction when passing, it is difficult to transport the quay crane, such as passing at low tide when the water surface falls, and in some cases it is impossible to transport. In addition, there are places such as Suez Canal where height restrictions are set by bridges on the transportation route. From the above, it has become very difficult to transport particularly large quay cranes to destinations such as harbors.

  On the other hand, several methods for solving this problem have been proposed. Some of these methods are described below. The first method is a method of transporting the quay crane 1X before assembly in units of parts and assembling it at a quay or the like that is an installation location. By this method, problems such as height limitation can be solved. However, a space for assembling the quay crane is required, and the occupation of this space hinders the cargo handling at the container terminal and causes another problem that the cargo handling efficiency is lowered. In addition, there is a problem that the assembly work performed locally is prolonged and the cost increases accordingly.

  The second method is a method in which the mast 3 which is an upper structure of the quay crane 2X is brought down (hereinafter referred to as mast fall), and the crane is lowered and transported. With reference to FIG. 7, this mast defeating method will be specifically described.

  In FIG. 7, the quay crane 1X mounted in the transport ship 36 is shown. First, the wire winch 20 is installed on the crane and the wire 21 is fixed to the mast 3. Here, the wire winch 20 is installed in the vicinity of the land-side leg tie beam 7 d or the machine room 8.

  Next, the backstay 2X and the forestay 30 are removed. In addition, the medium-sized or smaller quay crane may not have the backstay 2X. Then, the fixing of the mast defeating mechanism 4 installed on the mast 3 is released, and preparations for defeating the mast 3 are made. The mast tilting mechanism 4 can be constituted by, for example, a pin coupling structure or a hinge.

  Next, the mast 3 is tilted while feeding the wire 21 from the wire winch 20. Then, after lowering the mast 3 to an arbitrary height, the wire winch 20 is stopped. Here, the mast 3 is supported by the wire 21.

  The mast support diagonal member 22 is configured to be able to be tilted together with the tilt of the mast 3 by releasing the fixation on the girder 5 side. Further, after removing the forestay 30, the boom 6 is lowered using the boom up mechanism 24 or a wire (not shown) for cargo handling. This boom 6 may be supported by a wire for cargo handling, or if there is a suitable structure or the like on the transport ship 36, it may be supported by being placed there.

  After defeating the mast in the above procedure and passing under the bridge, etc., the work for raising the mast 3 is performed in the reverse procedure described above. By such a method, even the large quay crane 1X can be transported by passing under a place where the height is restricted.

  In addition, the second method (mast defeating) can solve the problem of cost increase due to the space occupation of the container terminal and the lengthening of assembly work in the first method. Therefore, at present, the second method is often used.

However, the second method has a problem that it is very difficult to reconnect the backstay 2X. That is, as shown in FIG. 7, especially when the back stay 2X of the large quay crane is removed, the girder 5 is subjected to the weight of the girder 5 and the weight of the machine room 8 to cause deflection. The distance between the girder end (left end in FIG. 7) and the mast 3 is the backstay 2X.
The backstay 2X cannot be reconnected. In addition, the edge part (left end of FIG. 7) of the girder 5 falls about 10-20 cm by this bending.

  Therefore, when the backstay 2X is reconnected, it is necessary to lift and support the girder end (left end in FIG. 7) with a large crane mounted on a crane ship (hoist ship) or a large truck crane. . This work increases work time and cost, if not as much as the first method described above.

  In addition, when the back stay 2X is removed, if the upper back stay and the lower back stay are divided into two, when reconnecting, the end portions of the upper back stay and the lower back stay are aligned in three dimensions. This is necessary, and this connecting operation becomes very difficult.

Further, the connecting operation of the backstay 2X is a dangerous operation because it needs to be performed at a height of about 50 to 80 m above the ground and above the girder 5 where the scaffold is unstable.

Japanese Patent Laid-Open No. 10-36076

  The present invention has been made in view of the above-described situation, and the object of the present invention is to reduce the overall height by a mechanism for defeating the mast, and in the quay crane having the back stay, when returning the defeated mast, It is an object of the present invention to provide a quay crane having a structure capable of easily and safely reconnecting a stay in a short time, and a method for transporting the quay crane. Moreover, it is in suppressing the conveyance cost of a quay crane.

  In order to achieve the above object, a quay bridge crane according to the present invention is a quay bridge crane for handling a marine transportation container. A leg having a land-side leg tie beam connecting the upper ends of the land-side legs, a girder suspended by the sea-side leg tie beam and the land-side leg tie beam, and horizontally extended, and a machine installed on the girder A quay bridge type comprising: a chamber, a mast erected at the upper end of the sea-side leg tie beam, a mast tilting mechanism for tilting the mast in a direction opposite to the girder, and a backstay connecting the mast and the girder A crane having a rail structure installed in an upper portion of the machine room, the rail structure having a traveling rail and a carriage installed movably along the traveling rail; Chromatography is, as a border a cut-off portion of the machine room near made upper backstay and lower back stay, characterized in that connected to the carriage below the upper backstay.

  With this configuration, when returning the collapsed mast, the carriage fixed to the upper back stay has only to be moved to the lower back stay side along the rails of the rail structure, so only one direction of force is required. The upper back stay and the lower back stay can be connected again. In other words, the three-dimensional alignment that is conventionally required is not necessary. For this reason, the upper backstay and the lower backstay can be easily connected in a short time.

  In addition, a large heavy machine (such as a truck crane or a crane ship) that performs an operation for supporting the end of the girder or the like is not necessary, and costs can be reduced. Further, since the upper backstay and the lower backstay can be reconnected in the upper space of the machine room, the safety of the reconnection work is improved and the working time can be shortened.

  In the above quay bridge crane, the upper part of the lower back stay is fixed to the rail structure or the machine room.

  With this configuration, the upper portion of the lower back stay is deformed (bent) integrally with the fixed rail structure or the machine room. Since the lower part of the upper back stay moves along the rail structure, the relative position of the upper back stay and the lower back stay can be kept constant at the rear end of the rail structure. This guide effect facilitates reconnection of the upper backstay and the lower backstay.

  In the above quay bridge crane, the upper back stay is configured to be connected via at least one link mechanism.

  With this configuration, when performing the work of defeating the mast, the carriage installed below the upper backstay can be moved in the horizontal direction by the weight of the upper backstay. Therefore, the operation of moving the carriage and the operation of defeating the mast can be performed separately, and the safety of the operation of defeating the mast can be improved. Similarly, safety can be improved in the work of setting up the mast.

  In order to achieve the above object, a transportation method for a quay bridge crane according to the present invention is the above transportation method for a quay bridge crane, wherein the quay bridge crane mounted on a carrier ship has a height restriction. When passing through a place, the mast is tilted in the opposite direction to the girder while the carriage installed on the upper backstay is running along the running rail.

  With this configuration, the backstay can be easily and safely reconnected in a short time during the work of setting up the mast of the quay crane. Therefore, the transportation cost of a quay crane can be suppressed.

  In order to achieve the above object, a transportation method for a quay bridge crane according to the present invention is the above transportation method for a quay bridge crane, wherein the quay bridge crane mounted on a carrier ship has a height restriction. When passing through a place, after the carriage installed on the upper backstay connected via at least one link mechanism travels along the traveling rail, the mast is tilted in the opposite direction to the girder. It is characterized by that.

  With this configuration, since the carriage installed on the upper backstay operates at a timing different from that of the mast during the work of defeating the mast and the work of raising the mast, it is possible to reduce the number of members that operate simultaneously. Thereby, the safety of work can be improved. Therefore, the transportation cost of a quay crane can be suppressed.

  In the above quay bridge crane transportation method, when the pier bridge crane mounted on the carrier completes passing through a place where the height is restricted, the mast is raised and the cart installed on the upper backstay The upper backstay and the lower backstay are connected after the vehicle travels along the travel rail.

  With this configuration, the upper backstay and the lower backstay can be connected easily and safely in a short time. Moreover, since a large-sized heavy machine is not required for the work of setting up the mast, the transportation cost of the quay crane can be reduced.

  According to the quay bridge crane and its transportation method according to the present invention, when a quay crane mounted on a transport ship passes under a bridge or the like with a height restriction, the mast is defeated and the total height of the crane is reduced. When the mast is returned after the passage, the backstay that connects the ends of the mast and the girder can be reconnected easily and safely in a short time. . Moreover, the conveyance cost of a quay crane can be suppressed.

It is the side view which showed the quay crane of embodiment which concerns on this invention. It is the rear view which looked at the quay crane of embodiment which concerns on this invention from the direction of A. It is an enlarged view around the machine room of the quay crane of the embodiment concerning the present invention. It is a front view of the trolley and the traveling rail of the quay crane of an embodiment concerning the present invention. It is the side view which showed the quay crane of different embodiment which concerns on this invention. It is the side view which showed the mode of the cargo handling of the conventional quay crane. It is a side view at the time of mounting the conventional quay crane on a transport ship.

  Below, the structure of the quay crane of embodiment which concerns on this invention, and the transport method of this quay crane are demonstrated, referring drawings.

  FIG. 1 shows a side view of a quay crane 1 according to an embodiment of the present invention. In this quay crane 1, a rail structure 10 is installed in an upper part of a machine room 8. The rail structure 10 includes a traveling rail 11 and a carriage 14 that is movably installed along the traveling rail 11.

  Further, the back stay 2 is composed of an upper back stay 2a and a lower back stay 2b with a separation portion in the vicinity of the machine room 8 as a boundary. A carriage 14 is connected to the lower or lower end of the upper backstay 2a. Further, the upper or upper end of the lower backstay 2 b is fixed to the end of the traveling rail 11. This fixing can be performed by welding or bolting. Further, the lower backstay 2 b may be fixed to the machine room 8 instead of the traveling rail 11.

  Further, the carriage 14 connected to the upper backstay 2 a is configured to be able to travel along the traveling rail 11. In the running rail 11, a fixing portion 12 for fixing the upper back stay 2a is provided on the opposite side of the end portion fixing the lower back stay 2b. The traveling rail 11 may be installed so as to extend from the upper part of the machine room 8 in the direction of the mast 3. Desirably, it is installed so as to be parallel to the girder 5.

  In FIG. 2, the rear view at the time of seeing the quay crane 1 from the direction of A of FIG. 1 is shown. FIG. 2S shows the quay crane 1 in which the girder 5 and the boom 6 are configured as a single unit. The girder 5 is suspended by a sea side leg tie beam 7c and a land side leg tie beam 7d. The boom 6 is coupled to the girder 5 via a boom up mechanism 24 constituted by a hinge pin. A machine room 8 is installed on the girder 5. Similarly, FIG. 2T shows a quay crane 1 including two girder 5 and boom 6.

  Next, with reference to FIGS. 1 and 2, the procedure of the method of defeating the mast 3 in the quay crane 1 according to the embodiment of the present invention will be described. First, as a preparatory work, as shown in FIG. 1, a rail structure 10 and a wire winch 20 are installed in the vicinity of the machine room 8. The wire 21 of the wire winch 20 is connected to the vicinity of the end of the mast 3.

Next, the lower end of the mast support diagonal 22 is removed from the girder 5 and connected to a traveling device such as a carriage. In addition, a rail or the like for traveling in the direction of the mast 3 may be disposed on the girder 5 with this traveling device.

  Next, the pin that connects the upper backstay 2a and the lower backstay 2b is removed to release the connection. At this time, tension is applied to the backstay 2. Therefore, it is necessary to pull the upper backstay 2a and the lower backstay 2b with a turnbuckle (locking device) or the like to release the tension acting on the pin.

  And the wire winch 20 is operated and the wire 21 is sent out. As the wire 21 is fed out, the mast 3 falls to the boom 6 side (right side in FIG. 1). In accordance with the tilting of the mast 3, a traveling device such as a carriage installed on the mast support diagonal 22 and the upper backstay 2a moves toward the boom 6 while supporting the weight of the upper backstay 2a and the like.

  Next, when the carriage 14 installed on the back stay 2a reaches the fixed portion 12 at the end of the traveling rail 11, the operation of the wire winch 20 is stopped, and the upper back stay 2a is fixed to the fixed portion 12 with bolts or the like. Fix it.

  This completes the mast defeating operation. In addition, when setting up a mast, work is performed in the reverse order of the above.

  FIG. 3 shows an enlarged view around the machine room 8 of the quay crane 1. The rail structure 10 is installed so as to cover the upper part of the machine room 8, and includes a traveling rail 11, a fixed portion 12, and a carriage 14. Further, a stopper 13 for stopping the carriage 14 is provided at the end of the traveling rail 11. Further, a handrail 23 is installed at the upper part of the machine room 8 so that the worker can safely connect and disconnect the backstays 2a and 2b at the upper part of the machine room 8. . FIG. 4 shows a front view of the carriage 14 and the traveling rail 11. Reference numeral 17 denotes a traveling wheel of the carriage 14.

  Next, the procedure of the method for setting up the mast 3 in the quay crane 1 according to the embodiment of the present invention will be described with reference to FIGS. First, the end of the fixed upper backstay 2a is removed from the fixing portion 12.

  Next, the wire winch 20 is operated and the wire 21 is wound up. Along with the winding of the wire 21, the carriage 14 installed on the upper back stay 2a moves in the direction of the lower back stay 2b (the direction indicated by the white arrow).

  When the end portion of the upper back stay 2a and the end portion of the lower back stay 2b approach each other, a securing device 16 such as a turn buckle or a hand winch is installed on the upper back stay 2a and the lower back stay 2b. Thereafter, the securing device 16 is tightened, and the upper back stay 2a and the lower back stay 2b are connected by a pin coupling structure or a link.

  Finally, the lower back stay 2b is removed from the traveling rail 11 or the machine room 8 so that tension is applied to the back stay 2. The forestay 30 is connected to the end of the mast 3 and the end of the boom 6 in the boom-up state. Thereafter, when the boom 6 is lowered, tension is applied to the forestay 3. With the above, the work for setting up the mast 3 is completed.

  In addition, since the rail structure 10 which consists of the traveling rail 11, the fixing | fixed part 12, and the trolley | bogie 14, the winch 20, the handrail 23, and the securing device 16 are members required only for the work of defeating the mast and the work of raising the mast. Once the mast is set up, it may be removed if it is no longer necessary to use it.

  With the above configuration, the following operational effects can be obtained. First, it is possible to easily and safely reconnect the upper backstay 2a and the lower backstay 2b in a short time. That is, since the movement of the carriage 14 is along the traveling rail 11, for example, the alignment of the lower back stay 2b fixed to the traveling rail 11 and the upper back stay 2a connected to the carriage 14 is one-dimensional alignment. Become. And since the position of the edge part of two backstays should just be matched on a straight line (on the running rail 11), reconnection of a backstay becomes very easy.

  Secondly, since the worker who connects the upper backstay 2a and the lower backstay 2b can work on the roof (about 9 m × 15 m) of the machine room 8, it is easy to ensure safety.

  Third, in order to fix the lower back stay 2b to the machine room 8 or the rail structure 10, the upper part of the lower back stay is deformed (bent) integrally with the fixed rail structure or the machine room. Since the lower part of the upper back stay moves along the rail structure, the relative position of the upper back stay and the lower back stay can be kept constant at the rear end of the rail structure. This guide effect facilitates reconnection of the upper backstay and the lower backstay.

  In FIG. 4, the carriage 14 is configured to travel in the grooved traveling rail 11, but the present invention is not limited to this configuration. What is necessary is just the structure which restrains the movement locus | trajectory of the trolley | bogie 14 fixed to the upper backstay 2a on the straight line. For example, you may comprise so that the trolley | bogie 14 may move in the state hung from the traveling rail.

  Moreover, it is good also as a structure which connects a wire etc. directly to the trolley | bogie 14, is towed, and controls the movement of the trolley | bogie 14 directly. With this configuration, it is possible to realize reliable movement of the carriage 14 in a short time. Moreover, a drive device may be mounted on the carriage 14 so as to be self-propelled.

  FIG. 5 shows a quay crane 1A according to another embodiment of the present invention. This quay crane 1A has an upper backstay 2a provided with at least one link mechanism.

  By this link mechanism, when the upper backstay 2a is disconnected from the lower backstay 2b, the upper backstay 2a starts to fall by its own weight (in the direction of the white arrow). Along with the lowering of the upper backstay 2a, the carriage 14 installed at the lower end of the upper backstay 2a starts to move in the horizontal direction and moves to the fixed portion 12. After the upper backstay 2a is fixed to the fixing portion 12, the wire winch 20 is actuated and the mast 3 is moved down. The operation of setting up the mast 3 is the reverse procedure. First, after setting up the mast 3, the carriage 14 is moved to the lower backstay 2b using a separately prepared wire, a driving device, or the like.

  With this configuration, for example, in the work of defeating the mast 3, first, the moving work of the upper backstay 2a is completed. When the worker operates the wire winch 20, only the tilting of the mast 3 and the mast support diagonal 22 move, so that it is easy to ensure safety. Further, in this work, the number of workers required for the work can be reduced as the number of places to be noted decreases. The mast 3 has a length of about 10 to 25 m.

1, 1A Wharf crane (quay crane)
2 Backstay 2a Upper backstay 2b Lower backstay 3 Mast 4 Mast falling mechanism 5 Girder 8 Machine room 10 Rail structure 11 Traveling rail 14 Carriage

Claims (6)

In the bridge crane for wharf handling a container for sea transportation, a leg part having a sea side leg tie beam connecting the upper ends of a pair of sea side legs and a land side leg tie beam connecting the upper ends of a pair of land side legs; A girder suspended by the sea-side leg tie beam and the land-side leg tie beam and extending in the horizontal direction, a machine room installed on the girder, a mast standing on the upper end of the sea-side leg tie beam, and the mast A bridge crane for a quay having a mast defeating mechanism for defeating the girder in a direction opposite to the girder, and a backstay connecting the mast and the girder,
A rail structure is installed in the upper part of the machine room, and the rail structure has a traveling rail and a carriage installed movably along the traveling rail,
A bridge crane for a quay characterized in that the back stay is composed of an upper back stay and a lower back stay with a separation part in the vicinity of the machine room as a boundary, and the carriage is connected below the upper back stay.   The bridge crane for a quay according to claim 1, wherein the upper part of the lower backstay is fixed to the rail structure or the machine room.   The bridge crane for a quay according to claim 1 or 2, wherein the upper back stay is connected and configured through at least one link mechanism. In the transportation method of the quay bridge crane according to claim 1 to 3, when the pier bridge crane mounted on a carrier ship passes through a place where the height is restricted,
A transportation method characterized by tilting the mast in a direction opposite to the girder while running a carriage installed on the upper backstay along the running rail. In the method for transporting a quay bridge crane according to claim 3, when the quay bridge crane mounted on a carrier ship passes through a place with a height restriction,
A transportation method characterized by tilting the mast in a direction opposite to the girder after a carriage installed on the upper backstay connected via at least one link mechanism travels along the traveling rail. .   After the quay bridge crane mounted on the carrier ship has passed the place where the height is restricted, the mast is raised and the carriage installed on the upper backstay is moved along the traveling rail. The transportation method according to claim 4, wherein the upper backstay and the lower backstay are connected.

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