JP5529612B2 - Crane roping structure - Google Patents

Description

  The present invention relates to a crane roping structure.

  As a crane roping method, as shown in FIG. 10, it is known to use four wire ropes R11, R12, R21, and R22 to hold the four corners of the hanger 8 '(for example, Patent Document 1). reference.).

  The wire rope R11 drawn out from the drum 13 ′ is attached to the land-side front end portion of the hanger 8 ′ via the guide sheave 31 ′ on the trolley 6 ′, and the wire rope R12 drawn out from the drum 13 ′ is connected to the trolley 6 It is attached to the land side rear end portion of the hanger 8 'through the' upper guide sheave 32 '.

  On the other hand, the wire rope R21 drawn out from the drum 14 'is attached to the sea side front end portion of the hanging tool 8' via the guide sheave 33 'on the trolley 6', and the wire rope R22 drawn out from the drum 14 'is A guide sheave 34 'on the trolley 6' is attached to the rear end of the suspension 8 'on the sea side.

  The drum 13 'is driven by an electric motor M1, and the drum 14' is driven by an electric motor M2. Now, when the drum 13 'and the drum 14' are synchronized and rotated in opposite directions, the hanger 8 'moves up and down. On the other hand, when the drum 13 'and the drum 14' are synchronized and rotated in the same direction, the hanger 8 'moves to the sea or land side.

  However, when the synchronization between the drum 13 ′ and the drum 14 ′ is disturbed, there is a problem in that the container C held by the hanger 8 ′ tilts as indicated by arrows a ′ and b ′ about the axis Y in the container longitudinal direction. there were.

  Further, as shown in FIG. 11, it has been proposed to prevent the container 4 ″ from being tilted by using two tilt adjusting drums 49 and 50 and two tilt adjusting ropes 51 and 52 (for example, patents). Reference 2).

  In the present invention, four drums 45A, 45B, 45C and 45D are arranged in a machine room (not shown) on the girder 6a, and two guide sheaves 46A and 46B are arranged at the base end of the girder 6a. Two guide sheaves 46C and 46D are arranged on the tip side of the boom 6b.

  Further, traversing and winding sheaves 47A, 47B, 47C, 47D are arranged at the four corners of the trolley 7 ″, and the two ropes 48A, 48B fed out from the two drums 45A, 45B are guided sheaves 46A, 46B on the girder 6a. And two ropes fed out from the remaining two drums 45C and 45D while being attached to the head block 9 "of the lifting tool 8" via traversing and winding sheaves 47A and 47B arranged on the land side of the trolley 7 " 48C and 48D are attached to a head block 9 "of a lifting tool 8" via guide sheaves 46C and 46D on the boom 6b and traversing and winding sheaves 47C and 47D arranged on the sea side of the trolley 7 ".

  Further, the tilt adjusting rope 51 of the tilt adjusting drum 49 provided on the land side of the trolley 7 ″ is attached to the land side center of the head block 9 ″ of the lifting device 8 ″, and the tilt adjusting drum 50 provided on the sea side of the trolley 7 ″. Is attached to the center of the seaside of the head block 9 ″ of the lifting device 8 ″.

  However, the present invention requires the tilt adjustment drums 49 and 50 and the tilt adjustment ropes 51 and 52, and the structure is complicated compared to the former. In addition, when the drums 4A to 45D are operated to raise and lower the container 4 ″ held by the lifting tool 8 ″, the tilt adjustment drums 49 and 50 need to be synchronized with the drums 45A, 45B, 45C, and 45D. There is a problem that the control system for synchronizing the drums 45A, 45B, 45C, 45D and the tilt adjustment drums 49, 50 becomes complicated.

  Further, according to the present invention, as a method of adjusting the skew of the container 4 ″, the traversing / rolling sheaves 47A, 47C on the right end side of the trolley are mounted on the movable frame 53, while the traversing / rolling sheaves 47B, 47D on the left end side of the trolley are movable. There is a problem that the number of parts is further increased because the movable frames 53 and 54 are mounted on the frame 54 and moved in directions opposite to each other.

JP 2001-48473 A JP 2003-40575 A

  The present invention has been made in order to solve such a problem, and an object of the present invention is to suppress the tilting of the container, and to trim and skew only by operating the winding traverse drum. It is to provide a crane roping structure that can be adjusted.

The invention according to claim 1 of the present application includes a trolley that traverses along the girder and the boom, four front and rear right and left hoisting / traverse drums provided above the girder, and wire ropes fed out from these hoisting and traversing drums. A hanging tool is suspended below the trolley, and the wire ropes are arranged in V-shapes at the four corners of the hanging tool, respectively, with respect to the longitudinal direction of the hanging tool.
The inclined portions of the two wire ropes inclined to the land side are parallel to each other at the front end portion of the suspension and the rear end portion of the suspension that are in the front-rear positional relationship, and the inclination portion 2 is inclined to the sea side. In a crane in which the inclined portions of the wire rope are parallel to each other , V-shaped at the four corners of the lifting device
Are fixed to rope supports provided at the four corners of the suspension tool, and two wire ropes are supported on the land side and the sea side of the trolley with respect to the vertical line passing through each rope support. A sheave is provided, and further, the distance between the two vertical lines provided on the land side and the sea side, the distance between the two sheaves provided on the land side of the trolley, and the two sheaves provided on the sea side of the trolley. It is characterized in that the interval between them is set to the same interval .

The invention according to claim 2 of the present application includes a trolley that traverses along the girder and the boom, four front and rear right and left hoisting / traverse drums provided above the girder, and wire ropes fed out of these hoisting and traversing drums. A hanging tool is suspended below the trolley, and the wire ropes are arranged in V-shapes at the four corners of the hanging tool, respectively, with respect to the longitudinal direction of the hanging tool.
The inclined portions of the two wire ropes inclined to the land side are parallel to each other at the front end portion of the suspension and the rear end portion of the suspension that are in the front-rear positional relationship, and the inclination portion 2 is inclined to the sea side. In a crane in which the inclined portions of the wire rope are parallel to each other , V-shaped at the four corners of the lifting device
Are fixed to rope supports provided at the four corners of the suspension tool, and two wire ropes are supported on the land side and the sea side of the trolley with respect to the vertical line passing through each rope support. A sheave is provided, and further, the distance between the two vertical lines provided on the land side and the sea side, the distance between the two sheaves provided on the land side of the trolley, and the two sheaves provided on the sea side of the trolley. Set the same distance between the two, and wind the two wire ropes inclined to the land side onto the land side winding and traverse drums via the girder side sheave, and the two inclined to the sea side The wire rope is wound around a sea-side winding and traverse drum through a boom-side sheave .

In the invention according to claim 3 of the present application, the sea side of the suspension and the land on the two sides of the suspension front end side and the suspension rear end side that are in a positional relationship with respect to the longitudinal direction of the suspension. The distance d with respect to the longitudinal direction of the two rope supports or sheaves provided on the side and the distance c with respect to the longitudinal direction of the two pairs of sheaves provided on the sea side and the land side of the trolley are set to the same distance. It is characterized by this.

The invention according to claim 4 of the present application is characterized in that the inclination angle θ1 of the wire rope inclined to the land side and the inclination angle θ2 of the wire rope inclined to the sea side are set to the same angle.

  The present invention relates to a trolley that traverses along a girder and a boom, four hoisting / traversing drums provided on the upper side of the girder, and a wire rope that is fed from the hoisting / traversing drums, and is suspended below the trolley. In the crane in which the suspension is suspended, the wire ropes are arranged in V-shapes at the four corners of the suspension, respectively, and the suspension front end and the suspension rear end that are in a longitudinal relationship with respect to the longitudinal direction of the suspension The two wire ropes inclined to the land side are made parallel to each other and the two wire ropes inclined to the sea side are made parallel to each other. When the hanger is traversed, tilting of the hanger or the container held by the hanger in the lateral direction and the longitudinal direction can be suppressed. Moreover, it is possible to adjust the trim, the wrist and the skew of the hanger or the container held by the hanger only by operating the four hoisting and traversing drums arranged at the front, rear, left and right with respect to the sea side end of the boom. it can.

  Further, according to the present invention, since the distance that the wire rope moves on the sheave is short and the number of times of bending is small, the life of the wire rope is prolonged. Furthermore, in the present invention, the number of ropes is doubled compared to the conventional one, but the wire rope can be made thinner by that amount, so that it is easy to hang. In addition, a thin wire rope has a higher flexibility and a longer life.

It is a perspective view which shows the roping structure of the 1st crane which concerns on this invention. It is a principal part enlarged side view of FIG. It is a principal part enlarged plan view of FIG. It is a perspective view which shows the roping structure of the 2nd crane which concerns on this invention. It is a principal part enlarged side view of FIG. It is a principal part enlarged plan view of FIG. It is a perspective view which shows the roping structure of the 3rd crane which concerns on this invention. It is a principal part enlarged side view of FIG. It is a principal part enlarged front view of FIG. It is a side view which shows the roping structure of the conventional crane. It is a perspective view which shows the roping structure of the conventional crane.

(A) 1st Embodiment As shown in FIG. 1, the crane 1 applied to this invention comes to traverse the trolley 4 along the girder 2 and the boom 3 provided in the sea side end of the girder 2. Yes. Further, two hoisting / transverse drums 6A and 6B arranged on the land side and two hoisting arranged on the sea side are arranged in the machine room (not shown) on the girder 2 in front, rear, left and right. A suspension 5 is suspended below the trolley 4 by a total of eight wire ropes 11A to 11D and 12A to 12D that are fed out from two transverse drums (hereinafter referred to as drums) 6C and 6D. Yes. Reference symbol C is a container held by the hanger 5.

  The trolley 4 includes first to fourth four sheaves 7A, 7B, 7C, and 7D on the land side, and fifth to eighth eight sheaves 8A, 8B, 8C, and 8D on the sea side. ing. On the other hand, the hanger 5 includes a hanger body 5A and a head block 5B, and the head block 5B is provided with rope supports 9A, 9B, 9C, and 9D including brackets and the like at four corners.

  Specifically, the first rope support 9A is provided at the land-side front end of the head block 5B, and the second rope support 9B is provided at the land-side rear end of the head block 5B. The rope support 9C is provided at the sea side front end of the head block 5B, and the fourth rope support 9D is provided at the sea side rear end of the head block 5B.

  As shown in FIG. 2, a wire rope 11A (11D) from the sheave 7A (7D) to the rope support 9A (9B) and a wire rope 12A (12D) from the sheave 8A (8D) to the rope support 9A (9B) ) In a V shape, the inclination angle θ1 of the inclined portion 13a (13d) of the wire rope 11A (11D) inclined to the land side, and the inclined portion 14a (14d) of the wire rope 12A (12D) inclined to the sea side. Is equal to the inclination angle θ2.

  Similarly, wire rope 11B (11C) from sheave 7B (7C) to rope support 9C (9D) and wire rope 12B (12C) from sheave 8B (8C) to rope support 9C (9D) are connected to V Inclined angle θ1 of the inclined portion 13b (13c) of the wire rope 11B (11C) inclined to the land side and the inclined angle θ2 of the inclined portion 14b (14c) of the wire rope 12B (12C) inclined to the sea side. And are equal.

  In FIG. 2, y1 is a vertical line passing through the rope support 9A (9B), and y2 is a vertical line passing through the rope support 9C (9D). Further, as shown in FIG. 2, the distance between the rope support 9A (9B) and the rope support 9C (9D) on the head block 5B, the land sheave 7A (7D) and the land sheave 7B ( 7C), and the distance between the sea sheave 8A (8D) and the sea sheave 8B (8C) on the trolley 4 is b.

  In FIG. 2, the sheave 7B (7C) is located on the land side of the vertical line y1, and the sheave 8A (8D) is located on the sea side of the vertical line y2, but the sheave 7B (7C) is located on the vertical line y1. Alternatively, the sheave 8A (8D) may be positioned on the vertical line y2 or on the land side of the vertical line y2 while positioned on the sea side of the vertical line y1. This is because if the interval between the sheaves is too wide, the wire rope may come into contact with the front and rear containers during cargo handling.

  Further, as shown in FIG. 3, at the land-side end of the hanger 5, the distance d in the hanger longitudinal direction between the first rope support body 9 </ b> A and the third rope support body 9 </ b> C and the first (fifth) ) Set the distance c in the longitudinal direction of the suspension of the sheave 7A (8A) and the second (sixth) sheave 7B (8B) to the same distance. Similarly, at the sea side end of the hanger 5, the distance d in the hanger longitudinal direction of the second rope support portion 9B and the fourth rope support portion 9D and the fourth (eighth) sheave 7D (8D) on the trolley 4 are provided. And the space | interval c of the lifting tool longitudinal direction of the 3rd (7th) sheave 7C (8C) is set to the same space | interval.

  Returning to FIG. 1, the first and second sheaves 15 </ b> A and 15 </ b> B for direction change are provided at the land-side front end of the girder 2, and the third and fourth direction change-overs are provided at the land-side rear end of the girder 2. Sheaves 15C and 15D are provided. Further, the first and second sheaves 16A and 16B for direction change are provided at the sea side front end of the boom 3, and the third and fourth sheaves 16C and 16D for direction change are provided at the sea side rear end of the boom 3. .

  Next, wire rope roping will be described. As shown in FIG. 1, the first wire rope 11 </ b> A pulled out from the first drum 6 </ b> A is passed through the first sheave 15 </ b> A at the land-side front end of the girder 2 and the first sheave 7 </ b> A on the trolley 4 to the land side of the lifting device 5. The second wire rope 11B fixed to the first rope support fixed body 9A at the front end and pulled out from the first drum 6A is connected to the second sheave 15B at the land side front end of the girder 2 and the second sheave 7B on the trolley 4. Then, it is fixed to the third rope support fixed body 9C at the sea side front end of the hanging tool 5.

  Further, the fifth wire rope 12A drawn out from the third drum 6C is passed through the first sheave 16A at the sea side front end of the boom 3 and the fifth sheave 8A on the trolley 4 to the first at the land side front end of the lifting device 5. The sixth wire rope 12B fixed to the rope support 9A and pulled out from the third drum 6C is passed through the third sheave 16B at the sea side front end of the boom 3 and the sixth sheave 8B on the trolley 4, and the sea of the suspension 5 It fixes to the 3rd rope support body 9C of a side front end part.

  The third wire rope 11C pulled out from the second drum 6B is passed through the third sheave 15C at the land-side rear end of the girder 2 and the third sheave 7C on the trolley 4, and the fourth at the sea-side rear end of the hanger 5. The fourth wire rope 11D fixed to the rope fixing portion 9D and pulled out from the second drum 6B is passed through the fourth sheave 15D at the land-side rear end of the girder 2 and the fourth sheave 7D on the trolley 4 to It fixes to the 2nd rope fixing | fixed part 9B of a land side rear end part.

  Further, the seventh wire rope 12C pulled out from the fourth drum 6D is passed through the third sheave 16C at the sea side rear end portion of the boom 3 and the seventh sheave 8C on the trolley 4 at the sea side rear end portion of the hanger 5. The eighth wire rope 12D fixed to the fourth rope fixing portion 9D and pulled out from the fourth drum 6D is suspended through the fourth sheave 16D at the sea side rear end of the boom 3 and the eighth sheave 8D on the trolley 4. 5 is fixed to the second rope fixing portion 9B at the rear end of the land side.

  Accordingly, as shown in FIG. 2, the inclined portion 13 a (13 d) of the wire rope 11 A (11 D) between the sheave 7 A (7 D) on the trolley 4 and the rope support 9 A (9 B) on the suspension 5, and the trolley 4 The inclined portion 13b (13c) of the wire rope 11B (11C) between the upper sheave 7B (7C) and the rope support 9C (9D) on the suspension 5 is parallel to the sheave 7B (7C).

  Further, the inclined portion 14a (14d) of the wire rope 12A (12D) between the sheave 8A (8D) on the trolley 4 and the rope support 9A (9B) on the lifting device 5, and the sheave 8B (8C) on the trolley 4 And the inclined part 14b (14c) of the wire rope 12B (12C) between the rope support bodies 9C (9D) of the hanger 5 becomes parallel.

  For this reason, when the trolley 4 is traversing, tilting of the container C held by the hanger 5 in the longitudinal direction and the lateral direction can be suppressed.

  Further, the first and third drums 6A and 6C are rotated in the direction of the arrow a, and the second and fourth drums 6B and 6D are rotated in the direction of the arrow b. By rotating the third drums 6A and 6C in the direction of the arrow b and simultaneously rotating the second and fourth drums 6B and 6D in the direction of the arrow a, the container C held by the lifting tool 5 can be skewed. .

  Further, the first drum 6A is rotated in the direction of arrow a, the third drum 6C is rotated in the direction of arrow b, and at the same time, the second drum 6B is rotated in the direction of arrow b and the fourth drum 6D is rotated in the direction of arrow a. On the contrary, when the first drum 6A is rotated in the direction of arrow b, the third drum 6C is rotated in the direction of arrow a, the second drum 6B is rotated in the direction of arrow a, and the fourth drum 6D is rotated in the direction of arrow b. The container C held by the hanger 5 can be trimmed.

  On the other hand, when the first and second drums 6A and 6B are rotated in the direction of the arrow a and the third and fourth drums 6C and 6D are rotated in the direction of the arrow b, the container C held by the lifting tool 5 rises. Conversely, when the first and second drums 6A and 6B are rotated in the direction of arrow b and the third and fourth drums 6C and 6D are rotated in the direction of arrow a, the container C held by the hanger 5 can be lowered. .

  Moreover, if the 1st-4th drum 6A-6D is rotated in the arrow a direction, the container C hold | maintained at the hanger 5 can be made to cross to the land side. On the other hand, when the first to fourth drums 6A to 6D are rotated in the direction of the arrow b, the container C held by the hanger 5 can be traversed to the sea side.

  Further, as shown in FIG. 3, the sheaves 7A, 8A (7B, 8B) and the sheaves 7D, 8D on the trolley 4 are more than the distance between the rope support 9A (9C) and the rope support 9B (9D). By widening the space between (7C, 8C), the swing of the hanger 5 in the longitudinal direction can be suppressed.

  Further, when the drums 6A and 6C on the front end side of the hanger or the drums 6B and 6D on the rear end side of the hanger are rotated in the direction in which the wire rope is loosened with respect to the longitudinal direction of the hanger 5, the front end of the hanger 5 Shift to the side or rear end side can be performed.

(B) Second Embodiment In the second embodiment, instead of the rope supports 9A, 9B, 9C, 9D in the first embodiment, sheaves 18A, 18B, 18C, 18D are provided at the four corners of the head block 5B to perform roping. It is a thing. In addition, the same code | symbol is attached | subjected to the site | part same as the site | part of 1st Embodiment, and detailed description is abbreviate | omitted.

  Further, in this example, four wire ropes 11A to 11D that are continuous from the land-side winding / traverse drums 6A, 6B to the sea-side winding / transverse drums (hereinafter referred to as drums) 6C, 6D are provided. Although used, in order to provide consistency with the first embodiment, it is necessary to consider the wire ropes 11A to 11D from the sheaves 18A to 18D to the drums 6C and 6D as the wire ropes 12A to 12D.

  As shown in FIG. 4, the first wire rope 11 </ b> A pulled out from the first drum 6 </ b> A includes a first sheave 15 </ b> A at the land-side front end of the girder 2 → a first sheave 7 </ b> A at the land-side front end of the trolley 4 → The first sheave 18A at the land-side front end of the trolley 4 → the fifth sheave 8A at the sea-side front end of the trolley 4 → the first sheave 16A at the sea-side front end of the boom 3 is wound around the third drum 6C.

  The second wire rope 11B pulled out from the first drum 6A is a second sheave 15B at the land-side front end of the girder 2 → a second sheave 7B at the land-side front end of the trolley 4 → the sea-side front end of the hanger 5 The third sheave 18C → the sixth sheave 8B at the sea side front end of the trolley 4 → the second sheave 16B at the sea side front end of the boom 3 is wound around the third drum 6C.

  The third wire rope 11C pulled out from the second drum 6B is a third sheave 15C at the rear end of the land side of the girder 2 → the third sheave 7C of the rear end of the trolley 4 → the sea side of the lifting device 5 The second sheave 18D at the rear end portion → the seventh sheave 8C at the rear end portion on the sea side of the trolley 4 → the third sheave 16C at the rear end portion on the sea side of the boom 3 is wound around the fourth drum 6D.

  The fourth wire rope 11D pulled out from the second drum 6B is a fourth sheave 15D at the rear end of the land side of the girder 2 → a second sheave 7D at the rear end of the trolley 4 → the land side of the suspension 5 The second sheave 18B at the rear end portion → the eighth sheave 8D at the rear end portion on the sea side of the trolley 4 → the fourth sheave 16D at the rear end portion on the sea side of the boom 3 is wound around the fourth drum 6D.

  By performing the above roping, an operation equivalent to that of the first embodiment can be performed.

  In FIG. 5, the sheave 7B (7C) is located on the land side of the vertical line y1, and the sheave 8A (8D) is located on the sea side of the vertical line y2, but the sheave 7B (7C) is located on the vertical line y1. Alternatively, the sheave 8A (8D) may be positioned on the vertical line y2 or on the land side of the vertical line y2 while positioned on the sea side of the vertical line y1. This is because if the interval between the sheaves is too wide, the wire rope may come into contact with the front and rear containers during cargo handling.

(C) Third Embodiment In the third embodiment, sheaves 18A, 18B, 18C, and 18D are provided at the four corners of the head block 5B instead of the rope supports 9A, 9B, 9C, and 9D in the first embodiment. Each of the first to fourth hoisting and traversing drums (hereinafter referred to as drums) 6A to 6D is made into one wire rope. In addition, the same code | symbol is attached | subjected to the site | part same as the site | part of 1st Embodiment, and detailed description is abbreviate | omitted.

  As shown in FIG. 7, the first wire rope 11 </ b> A pulled out from the first drum 6 </ b> A is connected to the first sheave 15 </ b> A at the land-side front end of the girder 2 → the sixth sheave 8 </ b> B at the sea-side front end of the trolley 4 → The third sheave 18C at the sea front front end is fixed to a fixing portion 20B corresponding to the second sheave 7B at the land front end of the trolley 4.

  Further, the fourth wire rope 11D drawn out from the second drum 6B is connected to the fourth sheave 15D at the rear end of the land side of the girder 2 → the seventh sheave 8C at the rear end of the trolley 4 → the sea side of the hanger 5 The fourth sheave 18D at the rear end is fixed to the fixing portion 20C corresponding to the third sheave 7C at the rear end of the trolley 4 on the land side.

  Further, the sixth wire rope 12B pulled out from the third drum 6C is connected to the second sheave 16B at the sea side front end of the boom 3 → the first sheave 7A at the land side front end of the trolley 4 → the land side front end of the hoist 5 The first sheave 18A is fixed to a fixing portion 20A corresponding to the fifth sheave 8A at the sea side rear end of the trolley 4.

  Further, the seventh wire rope 12C pulled out from the fourth drum 6D is connected to the third sheave 16C at the sea side rear end of the boom 3 → the fourth sheave 7D at the land rear end of the trolley 4 → the land side of the suspension 5 The second sheave 18B at the rear end is fixed to the fixing portion 20D corresponding to the eighth sheave 8D at the rear end of the trolley 4 on the sea side.

  By performing the above roping, an operation equivalent to that of the first embodiment can be performed.

  In FIG. 8, the fixing portion 20B (20C) corresponding to the sheave 7B (7C) is located on the land side from the vertical line y1, and the fixing portion 20A (20D) corresponding to the sheave 8A (8D) is more than the vertical line y2. Although it is located on the sea side, the fixing portion 20B (20C) is positioned on the vertical line y1 or on the sea side of the vertical line y1, while the fixing portion 20A (20D) is on the vertical line y2 or the vertical line y2. It can also be located on the land side. This is because if the distance between the sheave and the fixing portion is too wide, the wire rope may come into contact with the front and rear containers during cargo handling.

5 Hangings 11A-11D, 12A-12D Wire ropes 13a (13d), 13b (13c) Inclined portions 14a (14d), 14b of two wire ropes 11A (11D), 11B (11C) inclined to the land side (14c) Inclined portion of two wire ropes 12A (12D) and 12B (12C) inclined to the sea side

Claims (4)

A trolley that traverses along the girder and the boom, four front / rear and left / right hoisting drums provided above the girder, and a wire rope that is fed from these hoisting / traversing drums suspends a suspension tool below the trolley , Further, the wire rope is arranged in a V shape at each of the four corners of the hanger, and the front of the hanger is in a front-rear positional relationship with respect to the longitudinal direction of the hanger.
At each part of the end and the rear end of the suspension, the inclined portions of the two wire ropes inclined to the land side are made parallel to each other, and the inclined portions of the two wire ropes inclined to the sea side are mutually connected. The wire ropes arranged in a V shape at the four corners of the suspension are fixed to the rope supports provided at the four corners of the suspension, and the vertical lines passing through the rope supports are fixed to each other. Two sheaves for supporting the wire rope are provided on the land side and the sea side of the trolley, and further, the interval between the two vertical lines provided on the land side and the sea side, and the two sheaves provided on the land side of the trolley A crane roping structure characterized in that the interval between sheaves and the interval between two sheaves provided on the sea side of the trolley are set to the same interval . A trolley that traverses along the girder and the boom, four front / rear and left / right hoisting drums provided above the girder, and a wire rope that is fed from these hoisting / traversing drums suspends a suspension tool below the trolley , Further, the wire rope is arranged in a V shape at each of the four corners of the hanger, and the front of the hanger is in a front-rear positional relationship with respect to the longitudinal direction of the hanger.
At each part of the end and the rear end of the suspension, the inclined portions of the two wire ropes inclined to the land side are made parallel to each other, and the inclined portions of the two wire ropes inclined to the sea side are mutually connected. In the cranes in parallel with each other, the wire ropes arranged in a V shape at the four corners of the suspension are
Two sheaves for supporting the wire rope are provided on the land side and the sea side of the trolley with respect to the vertical line passing through each rope support, and are fixed to the rope supports provided at the four corners of the lifting device. The distance between the two vertical lines on the sea side and the sea side, the distance between the two sheaves on the land side of the trolley, and the distance between the two sheaves on the sea side of the trolley are the same distance. And wind the two wire ropes inclined to the land side to the land side winding and traverse drum through the girder side sheave, and the two wire ropes inclined to the sea side to the boom side sheave The crane roping structure according to claim 1, wherein the crane is wound on a sea-side winding and traverse drum . Two rope supports provided on the sea side and the land side of the hanger at the two parts of the hanger front end side and the hanger rear end side, which are in a longitudinal relationship with respect to the longitudinal direction of the hanger, or claim wherein the distance d with respect to sling longitudinal sieve, to set the interval c for sling longitudinal two pairs of sheaves provided on the sea side and land side of the trolley to the same interval 1 or 2 roping structure of the serial mounting of the crane. Roping structure according to claim 1 or 2 Symbol mounting crane and setting the inclination angle θ1 of the wire rope which is inclined land side, an inclined angle θ2 of the wire rope which is inclined to the sea side at the same angle.