JP5968820B2 - Quay crane - Google Patents

Description

  The present invention relates to a quay crane including a sliding boom that is slidably supported on a leg structure.

  At container terminals such as harbors and inland areas, containers between ships, railways and trailers are handled by quay cranes and portal cranes. If this container terminal is adjacent to the airport, quay cranes may be subject to height restrictions. Therefore, in such a container terminal, a quay crane (also referred to as a low profile crane) including a sliding boom (hereinafter referred to as a shuttle boom) supported slidably on a leg structure is employed.

  Here, the quay crane 1X is demonstrated, referring FIG.10 and FIG.11. Here, the front and back direction in the drawing in FIG. 10 is the x direction that is the traveling direction of the quay crane 1X, and the left and right direction in the drawing is the y direction that is the transverse direction of the quay crane 1X. The quay crane 1X includes a leg structure 3 that supports a shuttle boom 2 that slides in the y direction.

  The leg structure 3 is provided on a traveling device 4 that enables the quay crane 1X to travel along the quay, and includes a support leg 5a and a support leg 5c (not shown) joined by a sill beam 7c (support leg joining member) or the like. A sea-side leg 6a and a land-side leg 6b having a support leg 5b and a support leg 5d (not shown) which are also provided on the traveling device 4 and joined by a sill beam 7c or the like. And the land-side leg portion 6b are joined by an upper portal tie beam (support leg joining member) 7a and a lower portal tie beam (support leg joining member) 7b.

  The quay crane 1 </ b> X includes a machine room 15 arranged on the shuttle boom 2. The machine room 15 is provided between a drum 10 that feeds and winds up a wire W connected to a lifting tool 9 that moves up and down from the trolley 8, a motor 11 that serves as a driving force for the drum 10, and between the drum 10 and the motor 11. Each drive device 14 such as a control device 13 for driving the transmission 12 and the motor 11 is housed.

  Next, cargo handling work by the quay crane 1X will be described. In FIG. 10, the quay crane 1 </ b> X performs a cargo handling operation in which a container C mounted on a container ship S is lifted by a lifting tool 9 and mounted on a trailer T waiting on a quay. Alternatively, the quay crane 1 </ b> X performs a cargo handling operation for loading the container C from the trailer T onto the container ship S.

  As shown in FIG. 11, when the cargo handling operation is completed and the container ship S leaves the shore, the shuttle boom 2 of the quay crane 1X slides from the sea side in the y direction to the land side (see arrow in FIG. 11). It becomes a dormant state. The sliding of the shuttle boom 2 from the sea side to the land side in the y direction is performed in order to avoid interference between the bridge of the container ship S and the shuttle boom 2 when the container ship S contacts or leaves the shore.

  This quay crane 1X is large and extends between the sea side leg part 6a and the land side leg part 6b (leg width) 60m, total height 50m, travel direction x depth 30m, shuttle boom 2 length 110m, The total weight is 2000 t, the shuttle boom 2 is 600 t, and the machine room 15 is also 150 t. Since the size and weight of each device are large, in the quay crane 1X, it is a subject to improve structural strength and earthquake resistance.

  As shown in FIG. 10, when the shuttle boom 2 is slid when the quay crane 1X performs cargo handling, the weight of the machine room 15 disposed on the shuttle boom 2 moves together to lower the overall height of the crane. As a result, the position of the center of gravity of the quay crane 1X is biased toward the sea and the stability is deteriorated, so that the earthquake resistance of the quay crane 1X during loading is reduced. On the other hand, even if the machine room 15 is arranged on the back reach side, the seismic resistance of the quay crane 1 </ b> X at the time of rest is lowered for the same reason.

  Then, the quay crane which arrange | positions a machine room on a leg structure is proposed (for example, refer patent document 1). According to the quay crane described in Patent Document 1, by disposing the machine room above the leg structure, the center of gravity position of the quay crane during loading and unloading is eliminated, and the structural arrangement is simplified. In addition to improving earthquake resistance, the boom is prevented from being bent without providing a boom with a reinforcing material for supporting the machine room.

  However, the quay crane described in Patent Document 1 has a temporary effect in solving the problems of simplification of structure and earthquake resistance in a low profile crane including a shuttle boom that slides in the sea and land directions. On the other hand, since the machine room is simply arranged on the leg structure as it is, there is a problem that the total height of the quay crane is high and the position of the center of gravity is high.

JP 2012-071947 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a quay crane that can improve earthquake resistance by lowering the center of gravity position of the crane and reducing movement of the center of gravity position. Is to provide.

Quay crane of the present invention for solving the above object, a leg structure which is composed of a pair of landside support leg and a pair of seaward support leg slidably supported slides on the leg structure and wherein the boom, a trolley that moves along the sliding boom, the quay crane and a hoisting attachment to lifting through the trolley, and Shirubimu joining the lower ends of the pair of the land side support leg, this Shirubimu optionally be arranged in the upper and a machine room fixing middle land leg ties joining the support leg of the pair of the land side, comprises at least one feeding winding raising drum wire connected to the load block machine room for housing the drive device such that, in together when it is fixed to the machine room fixing middle land side leg ties, a state of being arranged in a position where the land side of the support leg of the land side, the machine Of the upper, characterized in that it is set at a position lower than the uppermost portion of the sliding boom and the leg structure.

  According to this configuration, the driving devices provided on the sliding boom in the conventional configuration are fixed to the support leg joining member, and the upper portion of the sliding boom and the leg structure is lower than the uppermost portion. By arrange | positioning in a position, a drive device can be fixed to a leg structure so that the gravity center position of a quay crane may become low. As a result, since the position of the driving devices is fixed to the leg structure during loading and unloading, the movement of the center of gravity of the quay crane can be reduced and the center of gravity of the quay crane can be lowered. Seismic resistance can be improved.

  For example, the weight of the machine room containing the drive devices is about 150 t. In the conventional configuration, the center of gravity of the quay crane is moved by moving the machine room every time the cargo handling work or the suspension operation is performed, or the center of gravity of the quay crane is installed by being provided at the upper part of the quay crane. Was high. However, according to said structure, the problem can be solved and the earthquake resistance of a quay crane can be improved.

  In addition, by fixing the driving devices to the leg structure, the structure of the quay crane can be simplified because a reinforcing member for a sliding boom is not required. In addition, by moving the drive devices from the sliding boom onto the leg structure, the amount of the reinforcing member for preventing the bending of the boom can be reduced, and the sliding boom can be reduced in weight. The power of the mechanism that slides the boom can also be reduced by reducing the weight of the slide boom.

  Furthermore, the quay crane uses the area inside the leg structure when handling the cargo because of its structure, but the driving devices are arranged in the area outside the outside surface of the leg structure. It is possible to prevent the cargo handling operation in the region from being hindered, and it is possible to fix the driving devices to the leg structure.

  In addition, in order to fix the driving devices, it is necessary to increase the structural strength by increasing the cross section of the support leg joining member, and the strength of the support leg joining member is improved accordingly. Thereby, the rigidity of the whole quay crane can also be improved.

  The driving devices referred to here are an assembly of devices such as a drum that feeds and winds a wire connected to a hanging tool, a motor that powers the drum, and a transmission of the drum. Some are included. In addition, the drive devices may be fixed to the leg structure without being exposed to the room, but if the drive devices are stored in the machine room and fixed to the leg structure, each device is waterproofed. This is preferable because there is no need to make it.

Configuration leg structure is provided with a and a land-side leg portion constructed sea-side leg portion has a plurality of supporting legs which are joined at supporting leg joint member, a drive operated device such, the sea side legs and supporting legs which can be configured to secure the supporting leg joining member for joining the supporting legs constituting the land side legs. According to this structure, the gravity center position of a quay crane can be made into the center of a leg structure more.

  Moreover, since the load of the drive devices can be distributed to both the sea side leg and the land side leg, the center of gravity position of the quay crane can be further stabilized. Furthermore, when the driving devices are fixed to a support joint member that is located below the leg structure and joins the support leg of the sea side leg and the support leg of the land side leg, the center of gravity position of the quay crane is further lowered. Seismic resistance can be improved.

When configured leg structure with multiple support leg, and sliding boom which is slidably supported on the leg structure, a trolley that moves along the slide-type boom, a hoisting attachment to lift through the door Lori in quay crane comprising, feeding the connected to the hanging jig wire, and winding up at least one comprising drive such a drum, is fixed to the supporting legs, the uppermost portion of the slide type boom and leg structures The upper portion of the leg structure can be arranged in a region outside the outer surface of the leg structure so that the upper portion of the leg structure is lowered .

  According to this configuration, similarly to the effects described above, the position of the driving devices is fixed to the leg structure during loading and unloading, so that the movement of the center of gravity is reduced and the center of gravity of the quay crane is lowered. Therefore, the earthquake resistance of the quay crane can be improved.

That the drive operated device such partitions the drum one driving device such that at least one, the other driving device such, that both, arranged to be on opposite sides of the slide-type boom Can do. According to this configuration, since the weight balance of the quay crane can be achieved with a plurality of driving devices, the position of the center of gravity can be further stabilized and the earthquake resistance can be improved.

  In particular, when one of the divided drive devices and the other drive device are arranged at the same height, the right and left weight balance of the quay crane is adjusted, and the position of the center of gravity can be stabilized.

  According to the present invention, the outer surface of the leg structure is configured such that the upper part of the driving device or the machine room storing the driving device is lower than the upper part of the sliding boom and the leg structure. Since the position of the driving devices is fixed to the leg structure during loading and unloading, the movement of the center of gravity can be reduced and the center of gravity of the quay crane can be lowered. The seismic resistance of the quay crane can be improved.

  In addition, by fixing the driving devices or the machine room containing the driving devices to the leg structure, it is possible to simplify the structure of the quay crane because no reinforcing member for the sliding boom is required. it can. In addition, by moving the drive devices from the sliding boom onto the leg structure, the amount of the reinforcing member for preventing the bending of the boom can be reduced, and the sliding boom can be reduced in weight. The power of the mechanism that slides the boom can also be reduced by reducing the weight of the slide boom.

It is a side view which shows the state at the time of cargo handling of the wharf crane of 1st embodiment which concerns on this invention. It is an arrow line view (front view) shown by II of FIG. It is a side view which shows the state at the time of a stop of the quay crane shown in FIG. It is a side view which shows the wharf crane of 2nd embodiment which concerns on this invention. It is an arrow view (front view) shown by V of FIG. It is a side view which shows the quay crane of 3rd embodiment which concerns on this invention. It is an arrow view (front view) shown by VII of FIG. It is a side view which shows the quay crane of 4th embodiment which concerns on this invention. It is an arrow view (front view) shown by IX in FIG. It is a side view which shows the state at the time of cargo handling of the conventional quay crane. It is a side view which shows the state at the time of the stop of the conventional quay crane.

  Hereinafter, a quay crane according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the front and back direction in the figure is the x direction that is the traveling direction of the quay crane, the left and right direction in the figure is the y direction that is the transverse direction of the quay crane, and the vertical direction in the figure is the vertical direction z The direction.

  First, a quay crane according to a first embodiment of the present invention will be described with reference to FIGS. The quay crane (low profile crane) 1 has a configuration in which the machine room 15 arranged on the shuttle boom (sliding boom) 2 is moved to the leg structure 3 from the configuration of the conventional quay crane 1X shown in FIG. A leg structure 3 composed of a plurality of support legs 5a to 5d, a shuttle boom 2 slidably supported by the leg structure 3, a trolley 8 moving along the shuttle boom 2, and a trolley 8 As shown in FIG. 1, the first drive device 14 a including at least one drum 10 that feeds and winds up the wire connected to the lifting tool 9 is housed in the configuration including the lifting tool 9 that moves up and down. When one machine room 15a is fixed to a machine room fixing upper portal tie beam (support leg joint member) 16a for joining the support leg 5a of the sea side leg part 6a and the support leg 5b of the land side leg part 6b. The region that is outside the outer surface of the leg structure 3 excluding the position lower than the uppermost part of the shuttle boom 2 and the leg structure 3, that is, the position RA higher than the uppermost part of the shuttle boom 2 and the leg structure 3. Arranged in the RB.

  Although not shown in FIG. 1, the second machine room 15b containing the second driving device 14b including the control device 13 and the like not included in the first driving device 14a is connected to the support leg 5a of the sea side leg 6a. , Fixed to the machine room fixing upper portal tie beam (supporting leg connecting member) 16b for connecting the landing leg 5b of the land side leg 6b, and lower than the shuttle boom 2 and the uppermost part of the leg structure 3, that is, the shuttle The boom 2 and the leg structure 3 are arranged in a region RC that is outside the outer surface of the leg structure 3 except for the position RA higher than the uppermost portion of the leg structure 3.

  In addition, the conventional drive devices 14 are accommodated in the machine room 15 without being divided into the first drive devices (one drive device) 14a and the second drive devices (the other drive device) 14b, Although it may be fixed to the upper portal tie beam 16a for fixing the machine room, here, as shown in FIG. 2, each device of the drive devices 14 is replaced with one first drive device 14a and the other second drive. The apparatus is divided into devices 14b, and both of them are arranged so as to be opposite to each other with the shuttle boom 2 interposed therebetween.

  The first drive device group 14a is an assembly of devices including the drum 10, the motor 11, and the transmission 12, and the second drive device group 14b includes the control device 13 that is not included in the first drive device group 14a. A collection of devices. The first machine chamber 15a that houses the first drive devices 14a is disposed in the region RB that is one outer side of the leg structure 3, and the second machine chamber 15b that houses the second drive devices 14b is disposed in the region RB. On the other hand, it arrange | positions in the area | region RC of the other outer side on the other side on both sides of the shuttle boom 2. FIG.

  In the first embodiment, the drive devices 14 of the quay crane 1 are divided into the first drive device 14a and the second drive device 14b, but the present invention is not limited to this. For example, the drive devices 14 may be divided into three or more. Moreover, you may arrange | position the 1st drive devices 14a and the 2nd drive devices 14b to right and left reverse. Further, when the trolley 8 is traversed by the wire, the drum that feeds and winds up the trolley 8, the motor that serves as the driving force of the drum, and the transmission provided between the drums and the motor are first installed. You may put in either one of the drive devices 14a or the second drive devices 14b, and when raising and lowering the lifting tool 9 by two drums, the first drive devices 14a and the second drive devices 14b Each may have its drum.

  Conventionally, the machine room 15 storing the drive devices 14 has a weight of 150 tons, and it has been necessary to reinforce the structural strength in order to support it. However, the drive devices 14 and the first drive devices 14a have to be reinforced. The structure for supporting them can be simplified by reducing the weight by dividing the second drive devices 14b into the first machine chamber 15a and the second machine chamber 15b. .

  Moreover, in this 1st embodiment, the weight of the 1st drive devices 14a and the 2nd drive devices 14b is divided so that the right and left of the quay crane 1 may be balanced. For example, when the first drive device 14a and the second drive device 14b are not arranged and the weight on the region RC side outside the outer surface of the quay crane 1 is heavy, the second device arranged on the region RC side. The weight of the drive devices 14b may be adjusted to be heavier than that of the first drive devices 14a. In this embodiment, the weight balance of the quay crane 1 is adjusted by setting the first driving devices 14a and the second driving devices 14b to the same weight.

In addition, in the first embodiment, the divided first driving device 14a and the second driving device 14b are arranged at the same height so that the left and right weight balance of the quay crane 1 is adjusted, and the quay The position of the center of gravity of the crane 1 can be stabilized.

  In addition, in the first embodiment, in consideration of the durability of the drive devices 14, the first drive devices 14a are in the first machine chamber 15a, and the second drive devices 14b are in the second machine chamber 15b. However, the upper portal tie beam 16a for fixing the machine room or the upper portal tie beam 16b for fixing the machine room is left uncovered without being stored in the first machine chamber 15a or the second machine chamber 15b. It may be fixed to. In that case, although it is necessary to make each apparatus waterproof, the quay crane 1 can be reduced in weight because the first machine room 15a and the second machine room 15b are not required.

  Further, in the first embodiment, conventionally, in order to reduce the width D1 of the first machine chamber 15a in the x direction and shorten the protruding length of the first machine chamber 15a, the rotation shaft has conventionally been in the x direction. The drum 10 that is provided horizontally is arranged vertically so that the rotation axis of the drum 10 is in the z direction. When the drum 10 is disposed horizontally so that the rotation axis of the drum 10 is in the x direction, the length of protrusion from the side surface of the leg structure 3 becomes long, and an extra moment is generated. Therefore, in this embodiment, in order to narrow the width D1 in the x direction of the first machine chamber 15a, it is preferable to arrange the drum 10 vertically.

  As shown in FIG. 1, the machine room fixing upper portal tie beam 16 a is disposed above the leg structure 3 (height equivalent to the height from the quay where the shuttle boom 2 is disposed). It is a support leg joining member which joins the support leg 5a of the part 6a and the support leg 5b of the land side leg part 6b, and is a member extending in the y direction. Further, the upper portal tie beam 16a for fixing the machine room has a larger cross section as shown in FIG. 2 than the upper portal tie beam 7a shown in FIG. 10, and a height H1 at which the first machine room 15a can be fixed. It is comprised. The machine room fixing upper portal tie beam 16b has the same configuration as the machine room fixing upper portal tie beam 16a, and a description thereof will be omitted.

  This height H1 is approximately the same as the height of the first machine chamber 15a. The first machine room 15a can be set to a predetermined height according to the device to be stored. However, at the height of the upper portal tie beam 7a provided in the conventional quay crane 1X shown in FIG. 10, the height of the first machine room 15a becomes larger. It cannot be fixed. Therefore, if the upper portal tie beam 16a for fixing the machine room 15a for fixing the first machine room 15a is formed to have a height H1 that is substantially the same as the height of the first machine room 15a, the first machine room 15a is firmly fixed. it can.

  By fixing the first machine room 15a to the machine room fixing upper portal tie beam 16a for joining the support leg 5a of the sea side leg part 6a and the support leg 5b of the land side leg part 6b, the center of gravity position of the quay crane 1 can be determined. It can be made the center of the leg structure 3 more. Moreover, since the load of the 1st drive devices 14a can be disperse | distributed to both the sea side leg part 6a and the land side leg part 6b, the gravity center position of the quay crane 1 can be stabilized more.

  Next, the operation of the quay crane 1 will be described. When the quay crane 1 unloads from the container ship S or loads on the container ship S, the shuttle boom 2 is slid to the sea side in the y direction as shown in FIG. At this time, in the present invention, the first machine room 15a and the second machine room 15b are fixed to the machine room fixing upper portal tie beam 16a and the machine room fixing upper portal tie beam 16b, respectively, and their positions do not move. The movement of the center of gravity position in the quay crane 1 is reduced.

The first machine chamber 15a and the second machine chamber 15b are located in regions RB and RC that are lower than the uppermost portions of the shuttle boom 2 and the leg structure 3 and outside the outer surface of the leg structure 3. Since they are arranged, the cargo handling work is not disturbed and the cargo handling work can be performed smoothly.

  On the other hand, when the cargo handling operation is completed and stopped, the shuttle boom 2 is slid to the land side in the y direction as shown in FIG. At this time, the first machine room 15a and the second machine room 15b are fixed to the machine room fixing upper portal tie beam 16a and the machine room fixing upper portal tie beam 16b, respectively. The movement of the center of gravity position at is reduced.

  According to said structure, the 1st machine room 15a which accommodated the 1st drive devices 14a which divided the drive devices 14 with the weight of 150 tons, and the 2nd machine chamber 15b which accommodated the 2nd drive devices 14b, Can be fixed to the leg structure 3 so as to lower the position of the center of gravity of the quay crane 1. This reduces the movement of the center of gravity position of the quay crane 1 because the positions of the first machine room 15a and the second machine room 15b having a weight of 150 tons both during loading and unloading are fixed to the leg structure 3. And since the gravity center position of the quay crane 1 can be made low, the earthquake resistance of the quay crane 1 can be improved.

  In addition, by fixing the first machine room 15a and the second machine room 15b to the leg structure 3, the reinforcing member of the shuttle boom 2 is not required, so that the structure of the quay crane 1 can be simplified. In addition, by moving the first drive devices 14a and the second drive devices 14b from the shuttle boom 2 onto the leg structure 3, a reinforcing member for preventing the deflection generated in the shuttle boom 2 is provided. The shuttle boom 2 can be reduced in weight by reducing the amount, and the power of the mechanism that slides the shuttle boom 2 can also be reduced by reducing the weight of the shuttle boom.

  By moving the first drive device 14a and the second drive device 14b on the shuttle boom 2 onto the leg structure 3, and further reducing the weight of the shuttle boom 2, the support leg 5a and the support leg 5c are joined. In order to reduce the load applied to the sea side leg tie beams (support leg joining members not shown) and the land side leg tie beams (support leg joining members) 7d and 7e that join the support legs 5b and 5d, the durability of the support leg joining members is also improved. Can be improved.

  Furthermore, the quay crane 1 uses its inner region of the leg structure 3 for cargo handling when handling, but the first machine room 15 a and the second machine room 15 b are connected to the outer surface of the leg structure 3. Since it is disposed in the outer region RB and the region RC, it is possible to prevent the cargo handling operation in the inner region from being hindered, and the first machine chamber 15a and the second machine chamber 15b can be fixed to the leg structure 3. .

  In addition, in order to fix the first machine chamber 15a and the second machine chamber 15b, it is necessary to increase the structural strength by increasing the cross section of the upper portal tie beam 16a for fixing the machine chamber and the upper portal tie beam 16b for fixing the machine chamber. Accordingly, the strength of the upper portal tie beam 16a for fixing the machine room and the upper portal tie beam 16b for fixing the machine room is improved accordingly. Thereby, the rigidity of the quay crane 1 whole can also be improved.

  In addition, about the structure of the wire W and sheave SV of this embodiment, it is an example and is not limited to this structure.

Next, the quay crane 20 of 2nd embodiment which concerns on this invention is demonstrated, referring FIG.4 and FIG.5. As shown in FIG. 4, the quay crane 20 includes a first machine room 15 a that houses a first drive device 14 a including a drum 10 that feeds or winds up a wire W connected to a hanging tool 9. Fixing to the machine room fixing lower portal tie beam (supporting leg connecting member) 21a for joining the supporting leg 5a of the part 6a and the supporting leg 5b of the land side leg part 6b, it is lower than the uppermost part of the shuttle boom 2 and the leg structure 3 It is located and configured in a region RB that is outside the outer surface of the leg structure 3.

  Further, although not shown in FIG. 4, the second machine room 15b for housing the second drive unit 14b is connected to the machine room fixing lower part for joining the support leg 5a of the sea side leg part 6a and the support leg 5b of the land side leg part 6b. It is fixed to the portal tie beam (support leg joining member) 21b, and is disposed in a region RC that is lower than the uppermost portions of the shuttle boom 2 and the leg structure 3 and outside the outer surface of the leg structure 3. Composed.

  In addition, as shown in FIG. 5, each device of the drive devices 14 is divided into one first drive device 14a and the other second drive device 14b, and the first drive device 14a is accommodated. The one machine room 15a is arranged in the region RB which is one outer side of the leg structure 3, and the second machine room 15b accommodating the second drive device 14b is opposed to the region RB with the shuttle boom 2 interposed therebetween. It arranges and constitutes in field RC of the other outside of the side.

  In the second embodiment, as in the first embodiment, the weights of the first drive devices 14a and the second drive devices 14b are divided so as to balance the left and right of the quay crane 1. Therefore, the weight balance of the quay crane 1 is adjusted. Further, by arranging the divided first driving devices 14a and second driving devices 14b at the same height, the right and left weight balance of the quay crane 1 can be adjusted, and the center of gravity position of the quay crane 1 can be stabilized. it can.

  As shown in FIG. 4, the machine room fixing lower portal tie beam 21 a is disposed below the leg structure 3 (above the sill beam 7 c and below the upper portal tie beam 7 a). It is a support leg joint member that joins the support leg 5a of the leg part 6a and the support leg 5b of the land side leg part 6b, and is a member extending in the y direction.

  Moreover, the lower portal tie beam 21a for fixing the machine room has a larger cross section as shown in FIG. 5 than the lower portal tie beam 7b shown in FIG. 10, and has a height H2 at which the first machine room 15a can be fixed. It is comprised. This height H2 is the same as the height of the first machine chamber 15a as in the first embodiment. Since the machine portal fixing lower portal tie beam 21b has the same configuration, the description thereof is omitted.

  In the second embodiment, similarly to the first embodiment, the drum 10 is arranged so that the rotation axis of the drum 10 is in the y direction in order to reduce the width D2 of the first machine chamber 15a. It is preferable to arrange it sideways.

  According to this configuration, in addition to the same effect as the quay crane 1 of the first embodiment, the first machine room 15a that houses the first drive device 14a and the second drive device 14b that houses the second drive device 14b. By arranging the second machine room 15b below the leg structure 3, the center of gravity position of the quay crane 20 can be lowered. Thereby, the earthquake resistance of the quay crane 20 at the time of cargo handling or a stop can be improved more.

  Next, the quay crane 30 of 3rd embodiment which concerns on this invention is demonstrated, referring FIG.6 and FIG.7. As shown in FIG. 6, the quay crane 30 fixes a first machine chamber 15 a that houses a first drive device 14 a including a drum 10 that feeds and winds up a wire W connected to a hanging tool 9. It fixes to the supporting leg 31a, and it arrange | positions in the area | region RB used as the outer side of the outer surface of the leg structure 3 so that the upper part may become lower than the uppermost part of the shuttle boom 2 and the leg structure 3. .

  Although not shown in FIG. 6, the second machine room 15 b that houses the second drive device 14 b is fixed to the machine room fixing support leg 31 c so that the shuttle boom 2 and the uppermost part of the leg structure 3 are located. The upper portion of the leg structure 3 is arranged so as to be lowered and arranged in a region RC that is outside the outer surface of the leg structure 3.

  In addition, as in the first and second embodiments, as shown in FIG. 7, each device of the drive devices 14 is divided into one first drive device 14a and the other second drive device 14b. Then, the first machine chamber 15a for housing the first drive devices 14a is arranged in the region RB which is one outer side of the leg structure 3, and the second machine chamber 15b for housing the second drive devices 14b. Is arranged in the other outer region RC on the opposite side of the shuttle boom 2 with respect to the region RB.

  In the third embodiment, as in the first embodiment, the weights of the first drive devices 14a and the second drive devices 14b are divided so as to balance the left and right of the quay crane 1. Therefore, the weight balance of the quay crane 1 is adjusted. Further, by arranging the divided first driving devices 14a and second driving devices 14b at the same height, the right and left weight balance of the quay crane 1 can be adjusted, and the center of gravity position of the quay crane 1 can be stabilized. it can.

  As shown in FIG. 6, the machine room fixing support leg 31a has a larger cross section than the support leg 5a shown in FIG. 10, and has a depth width D3 capable of fixing the first machine room 15a. The depth width D3 is approximately the same as the depth width of the first machine chamber 15a. The machine room fixing support legs 31c (not shown) have the same configuration and will not be described.

  In the third embodiment, for the same reason as in the first and second embodiments, the drum 10 has the rotation axis of the drum 10 in the z direction in order to reduce the width D4 of the first machine chamber 15a. It is arranged vertically so that

  According to this configuration, similarly to the effects described in the first and second embodiments, the first machine chamber 15a and the second drive devices 14b in which the first drive devices 14a are accommodated during loading and unloading. Since the position of the stored second machine room 15b is fixed to the leg structure 3, the movement of the center of gravity of the quay crane 30 can be reduced and the center of gravity of the quay crane 30 can be lowered. Seismic resistance can be improved.

  In this embodiment, the first machine room 15a and the second machine room 15b are fixed to the machine room fixing support leg 31a and the machine room fixing support leg 31c of the sea side leg part 6a. The support legs 5b and the support legs 5d (not shown) may be fixed to a machine room fixing support leg having a large cross section.

  Next, a quay crane 40 according to a fourth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 8, the quay crane 40 includes a machine room 15 that houses a driving device 14 including a drum 10 that feeds and winds up a wire W connected to a hanging tool 9, and supports a landing leg of a land-side leg portion 6b. 5b and the supporting leg 5d are fixed to a machine room fixing middle land side leg tie beam (supporting leg connecting member) 41 so that the upper part of the machine room 15 is lower than the uppermost parts of the shuttle boom 2 and the leg structure 3. The leg structure 3 is arranged in the region RD that is outside the outer surface.

As shown in FIG. 9, the machine room fixing middle land-side leg tie beam 41 is disposed in the middle part of the leg structure 3 (above the sill beam 7c and below the boom support tie beam 7e). It is a support leg joining member which joins the support leg 5b and the support leg 5d of the part 6b, and is a member extending in the x direction. In the fourth embodiment, the machine room fixing middle land-side leg tie beam 41 is provided above the sill beam 7c. However, the machine room 15 may be fixed to the sill beam 7c.

  According to this configuration, the cargo can not be handled by the back reach, but the machine room 15 that houses the driving devices 14 can be fixed to the leg structure 3 so that the center of gravity of the quay crane 40 is lowered. Thereby, since the position of the drive devices 14 is fixed to the leg structure 3 at the time of cargo handling and suspension, the movement of the gravity center position of the quay crane 40 can be reduced, and the gravity center position of the quay crane 40 can be lowered. The earthquake resistance of the quay crane 40 can be improved.

  In the first to fourth embodiments described above, the low-profile crane, which is most effective when the present invention is applied, has been described as an example. However, the present invention can be applied to a quay crane equipped with a undulating beam. Needless to say.

  The quay crane according to the present invention includes a drive unit or a machine room housing the drive unit, and the upper part of the slide boom and the uppermost part of the leg structure is lower than the upper part of the leg structure. By arranging in the area outside the side, the position of the driving devices is fixed to the leg structure during loading and unloading, so the movement of the center of gravity can be reduced and the center of gravity of the quay crane can be lowered. Therefore, it can utilize for a low profile crane provided with the shuttle boom supported by the leg structure so that sliding is possible, and can improve the earthquake resistance of the low profile crane.

1, 20, 30, 40, 1X Quay crane 2 Shuttle boom (sliding boom)
3 leg structure 4a, 4b traveling device 5a-5d support leg 6a sea side leg part 6b land side leg part 7a upper portal tie beam (support leg joining member)
7b Lower portal tie beam (support leg joint member)
7c Sill beam (support leg joint member)
7d, 7e Land side leg tie beam (support leg joint member)
8 Trolley 9 Lifting tool 10 Drum 11 Motor 12 Transmission 13 Control device 14 Drive device 14a First drive device 14b Second drive device 15 Machine room 15a First machine room 15b Second machine room 16a, 16b Machine room fixed Upper portal tie beam (support leg joint member)
21a, 21b Lower portal tie beam for fixing machine room (support leg joint member)
31a, 31b Machine room fixing support leg 41 Machine room fixing middle land side leg tie beam (support leg joint member)

Claims (1)

A pair of landward support leg and a pair of sea side leg structure composed of a support leg of a sliding boom slidably supported on the leg structure, a trolley that moves along the sliding boom In a quay crane equipped with a lifting tool that goes up and down via this trolley,
A sill beam that joins the lower ends of the pair of land-side support legs, and a machine room fixing middle land-side leg tie beam that is disposed above the sill beam and joins the pair of land-side support legs,
Machine room for housing the drive device such that at least one winding raising drum feeding a wire connected to the load block is to together when it is fixed to the machine room fixing middle land side leg ties, the landside It is in a state where it is placed on the land side of the support leg,
A quay crane , wherein an upper portion of the machine room is set at a position lower than an uppermost part of the sliding boom and the leg structure.

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