JP2010275034A - Crane rope fitting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress any sway of a container or provide a lifting sling during the traveling motion and the traverse motion, and to rapidly skew the container or the lifting sling with high accuracy. <P>SOLUTION: Two congruent triangles are formed of one set of two ropes 71, 72 (75, 76) drawn from a drum 16 on first and second virtual surfaces assumed on an end in the longitudinal direction of a lifting sling 8. Two congruent triangles are formed of one set of two ropes 74, 78 (73, 77) drawn from a drum on third and fourth virtual surfaces assumed on an end in the transverse direction of the lifting sling 8 while oblique lines x1, x2 (x5, x6) being directed in the separating direction. Oblique lines x4, x8 (x3, x7) are opposite to each other, and ropes 73, 74 on the drum side arranged on third and fourth virtual surfaces are attached to a link 151 on the drum side of a parallel link type skew compensation device 150 provided on a trolley, and ropes 77, 78 on the counter-drum side arranged on the virtual surface are attached to a link 152 on the counter drum side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rope hanging structure of a crane (transfer crane) that performs container storage work in a container yard.

  As a rope hanging structure of a crane that performs container storage work in a container yard, a crane wire-leaving structure in which ropes are arranged in a V shape on each of four rope-wrapping virtual surfaces constituting the side surface of an inverted pyramid (for example, , Or refer to Patent Document 1.) Alternatively, a cargo handling lifting device in which ropes are respectively arranged in an X shape on four rope-wrapping virtual surfaces constituting a rectangular parallelepiped side surface is known (see, for example, Patent Document 2). ).

  However, Patent Document 1 merely uses the rigidity of the rope arranged in a V shape to suppress the shaking of the container during traveling and traversing. On the other hand, Patent Document 2 includes means for lifting and skewing the container, but it is necessary to operate a plurality of actuators in conjunction with each other by using hydraulic pressure. There is a disadvantage that unbalance or container runout occurs.

Japanese Patent No. 3268224 Japanese National Patent Publication No. 10-507435

  The present invention suppresses the swing of a container or a suspension tool during traveling and traversing, while the structure of the crane or rope can be quickly and accurately skewed despite its simple structure. It is to provide a hanging structure.

(1) The crane rope hanging structure according to the present invention is a crane in which a hanging tool is suspended by a plurality of ropes drawn from a single drum. On the virtual wrapping surface of the rope, a set of two ropes pulled out from the drum is passed so as to form a triangle between the suspender and the trolley so that the respective hypotenuses face away from each other. In the third and fourth rope-wrapping virtual surfaces assumed at the ends in the transverse direction, a pair of ropes drawn from the drum forms a triangle between the lifting device and the trolley, and each hypotenuse faces each other. So that all triangles are congruent,
Furthermore, a parallel link type skew compensation device is provided on the trolley, and drum-side ropes arranged on the third and fourth rope winding virtual surfaces are attached to the drum-side link of the skew compensation device, and the anti-drum side The third drum and the fourth rope wrapping rope are mounted on the link, and the rope on the side opposite to the drum arranged on the virtual surface is mounted.

(2) The rope hanging structure of the crane according to the present invention is the above-described (1), wherein the drum provided at one end of the trolley and the end of the suspension tool in the direction perpendicular to the axis of the drum and in the longitudinal direction of the hoist The first sheave group provided in the center, the second sheave group whose shaft core is parallel to the shaft core of the sheave of the first sheave group and four corners of the trolley, the shaft core is parallel to the shaft core of the drum and the trolley A third sheave group provided on the opposite side of the drum, a fourth sheave group whose axis is orthogonal to the sheave axis of the first sheave group and provided at the four corners of the lifting device, and the axis is the axis of the drum. A fifth sheave group provided in parallel and in the center of the trolley,
A first virtual wrapping virtual surface assumed at the end in the longitudinal direction of the hanger with a first and second set of ropes that suspend the hanger from the drum via the first and second sheave groups. A triangular shape is formed on the end of the lifting device in the longitudinal direction with a fifth and sixth set of ropes that support the lifting device from the drum via the third, first, and second sheave groups. Forming a triangle on the second rope wrapping virtual surface, and suspending a hanging tool from the drum via the fourth, fifth sheave group and the third, fourth, fifth sheave group. Form a triangle on the third and fourth rope wrapping virtual planes assumed at the end in the transverse direction of the hanger with a pair of ropes of 8 and 3rd and 7th and make all triangles congruent It is characterized by.

(3) The rope hanging structure of the crane according to the present invention includes the drum provided at the center of the trolley in the above (1), and the end of the suspension tool in the direction perpendicular to the axis of the drum and in the longitudinal direction of the suspension The first sheave group provided in the center, the second sheave group whose shaft core is parallel to the shaft core of the sheave of the first sheave group and four corners of the trolley, the shaft core is parallel to the shaft core of the drum and the trolley A third sheave group provided at both ends of the first sheave group, a fourth sheave group whose shaft core is orthogonal to the shaft core of the sheave of the first sheave group and provided at the four corners of the lifting device, and the shaft core is parallel to the shaft core of the drum And a fifth sheave group provided in the center of the trolley,
A pair of first, second, fifth, and sixth ropes that suspend the suspension device from the drum via the third, first, and second sheave groups at the longitudinal end of the suspension device. 4th, 8th and 3rd which form a triangle in the assumed 1st, 2nd rope winding virtual surface, and suspend a suspension tool from the said drum via the 3rd, 4th, 5th sheave group. The third and fourth rope wrapping imaginary planes assumed at the lateral ends of the hanger with each of the seventh pair of ropes form a triangle, and all the triangles are congruent. Is.

  (4) In the rope hanging structure of the crane of the present invention, in the above (1) to (3), all the triangle bases formed by the rope spanned between the trolley and the suspension are positioned on the trolley side. It is characterized by.

  The present invention relates to a crane in which a suspension tool is supported by a plurality of ropes drawn from one drum, and the first and second rope-wrapping virtual surfaces assumed at the longitudinal ends of the suspension tool are drawn from the drum. In addition, a pair of two ropes is formed so as to form a triangle between the hanger and the trolley so that the hypotenuses are directed away from each other. In the fourth rope wrapping virtual plane, a set of two ropes drawn from the drum is formed so that a triangle is formed between the hanger and the trolley so that each hypotenuse faces each other. Therefore, all of the 8 ropes (2 x 4 sets) included in the four rope wrapping virtual planes assumed around the suspension have truss structure, and the container or the suspension Suppressor for suppressing force les is now improved.

  Further, according to the present invention, a parallel link type skew compensation device is provided on the trolley, and the drum side ropes arranged on the third and fourth rope winding virtual surfaces are attached to the drum side link of the skew compensation device. Since the anti-drum side ropes arranged on the third and fourth rope wrapping virtual surfaces are attached to the anti-drum side link, the container or the suspension tool can be quickly moved in cooperation with the operation of the tilting devices 115 and 116. In addition, it is possible to skew with high accuracy.

It is a perspective view of a transfer crane. It is a perspective view which shows the rope hanging structure which concerns on this invention. It is a top view of the skew control apparatus in this invention. It is a side view of the skew control apparatus in this invention. It is a side view of a single-head cylinder type tilting device. It is a side view of a double-headed cylinder type tilting device. It is a schematic diagram of the rope hanging structure when FIG. 2 is viewed from the direction of arrow A. FIG. 3 is a schematic diagram of a rope hanging structure when FIG. 2 is viewed from an arrow B direction. (A)-(d) is a triangular pattern figure. It is operation | movement explanatory drawing of the skew compensation apparatus in this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a transfer crane (hereinafter referred to as a crane) 1 related to the present invention has a crane body 2 formed in a portal shape, and four sets of front and rear, left and right traveling wheels provided on the legs 3 thereof. 4 advances the container storage zone in the direction of arrow E. The crane 1 also has a trolley 6 that moves forward in the direction of arrow F on the girder 5 above the crane body 2 and a plurality of wire ropes (hereinafter, ropes) drawn from a drum (not shown) on the trolley 6. The hanger 8 is suspended by 7). The crane 1 moves backward in the direction opposite to the arrow E, and the trolley 6 moves backward in the direction opposite to the arrow F. Reference numeral 9 denotes a container.

  As shown in FIG. 2, the trolley 6 includes one drum 16 having eight (2 × 4 sets) ropes, an axis that is parallel to the axis of the first sheave group 10, and the trolley 6. A second sheave group 20 provided at the four corners, a third sheave group 30 provided with an axis parallel to the axis of the drum 16 and on the opposite side of the trolley 6, and an axis parallel to the axis of the drum 16. A fifth sheave group 50 provided in the center of the trolley 6 and a skew control device 150 provided in the center of the trolley 6 are provided.

  On the other hand, the lifting tool 8 includes a first sheave group 10 provided in the center of both ends in the longitudinal direction of the lifting tool 8 in a direction in which the shaft core is orthogonal to the shaft core of the drum 16, and a sheave whose shaft core is the first sheave group 10. A fourth sheave group 40 provided at the four corners of the hanger 8 and orthogonal to the axis is provided.

  The fifth sheave group 50 includes two sheave groups of first and second sheaves 51 and 52 provided on the forward side of the trolley 6 and third and fourth sheaves 53 and 54 provided on the reverse side of the trolley 6. It is configured. The first and second sheaves 51 and 52 and the third and fourth sheaves 53 and 54 are respectively supported by the same or common shaft, but if desired, the first and third sheaves 51 and 53 and The second and fourth sheaves 52 and 54 may be separated from each other in the longitudinal direction of the hanger 8.

  Further, the trolley 6 is provided with a single-head cylinder type tilting device 115 on the drum 16 side and a single-head cylinder type tilting device 116 on the non-drum side. The former slides the arm 123 provided at the connection portion of the first and second ropes 71 and 72 in parallel with the drum 16, and the latter includes the arm 123 provided at the connection portion of the fifth and sixth ropes 75 and 76. The drum 16 is slid in parallel.

  As shown in FIG. 5, the single-head cylinder type tilting devices 115 and 116 are configured to slide the single-head cylinder 122 in the double-headed arrow direction by the electric motor 121. Note that a double-headed cylinder tilting device 111 may be used instead of the single-headed cylinder tilting devices 115 and 116. As shown in FIG. 6, the double-head cylinder type tilting device 111 slides the double-head cylinder 120 in the double-headed arrow direction by an electric motor 119 to perform a skew operation.

  Further, as shown in FIG. 2, the trolley 6 is provided with an independent control type skew compensation device 150 at substantially the center. The skew compensation device 150 is of a parallel link type, and is arranged in parallel with the drum 16 and has two long and short links 151 and 152 that rotate in the same horizontal plane, and these links 151 and 152 are parallel to each other. And an electric cylinder 154 attached to the free end of the long link 151 so as to be parallel to the connection link 153. In addition, the tips of the third and fourth ropes 73 and 74 are attached to the long link 151 on the drum side, and the tips of the seventh and eighth ropes 77 and 78 are attached to the short link 152 on the counter drum side. ing.

  More specifically, as shown in FIG. 3, the long and short links 151 and 152 are pivotally supported by a support shaft 156, respectively. Further, the two links 151 and 152 are connected by a connecting link 153 so as to be parallel to each other. The connection link 153 is pivotally supported by a bolt 158 so as to be parallel to a straight line 157 connecting the two support shafts 156 and 156. The electric cylinder 154 is also pivotally supported on the long link 151 by a bolt 158. The third and fourth ropes 73 and 74 are attached to the long drum link 151 on the drum side by a mounting bracket 159, and the seventh and eighth ropes 77 and 78 are short on the non-drum side by the mounting bracket 159. It is attached to the link 152. The mounting bracket 159 is also attached using bolts 158.

  As shown in FIG. 2, the drum 16 is installed at one end of the trolley 6 corresponding to the front end in the longitudinal direction of the hanger 8. The drum 16 includes a first and a second set of ropes 71 and 72, and a third, a first and a second sheave group that support the hoist 8 via the first and second sheave groups 10 and 20. The fifth and sixth sets of ropes 75 and 76, the fourth, fifth and sixth sheave groups 40, 50 and 60, and the third and fourth A fourth and eighth set of ropes 74 and 78 for supporting the lifting tool 8 via the fourth and fifth sheave groups 30, 40 and 50, and also the fourth, fifth and sixth sheave groups 40 and 50. , 60 and third, fourth, and fifth sheave groups 30, 40, and 50, and third and seventh two sets of ropes 73 and 77 that support the hanging tool 8.

  (1) More specifically, when viewed from the direction of arrow A, the first rope 71 passes through the rear sheave 12 on the front end side of the first sheave group 10 and the front left end sheave 21 of the second sheave group 20. The triangle a is formed on the first rope wrapping virtual surface (not shown) that is connected to the second rope 72 and assumed at the front end in the longitudinal direction of the hanger 8.

  (2) The second rope 72 is connected to the first rope 71 via the front sheave 11 on the front end side of the first sheave group 10 and the front right end sheave 22 of the second sheave group 20. A triangle b is formed on a first rope-wrapping virtual surface (not shown) assumed at the front end in the longitudinal direction.

  (3) The fifth rope 75 passes through the central sheave 31 of the third sheave group 30, the front sheave 13 on the rear end side of the first sheave group 10, and the rear left end sheave 23 of the second sheave group 20. A triangle c is formed on a second rope-wrapping virtual surface (not shown) connected to the sixth rope 76 and assumed at the rear end portion in the longitudinal direction of the hanger 8.

  (4) The sixth rope 76 passes through the central sheave 32 of the third sheave group 30, the rear sheave 14 on the rear end side of the first sheave group 10, and the rear right end sheave 24 of the second sheave group 20. A triangle d is formed on a second rope-wrapping virtual surface (not shown) that is connected to the fifth rope 75 and assumed at the front end in the longitudinal direction of the hanger 8.

  (5) On the other hand, when viewed from the direction of arrow B, the fourth rope 74 is skew compensated via the right end sheave 42 on the front end side of the fourth sheave group 40 and the second sheave 52 of the fifth sheave group 50. A triangle f is formed on a third rope-wrapping virtual surface (not shown) that is connected to the long cross beam 151 of the device 150 and is assumed at the front end portion of the hanger 8 in the lateral direction.

  (6) The eighth rope 78 is skew compensated via the left end sheave 34 of the third sheave group 30, the left end sheave 41 on the front end side of the fourth sheave group 40, and the first sheave 51 of the fifth sheave group 50. A triangle e is formed on a third rope-wrapping virtual surface (not shown) that is connected to the 150 short cross beams 152 and is assumed at the front end of the hanger 8 in the lateral direction.

  (7) The third rope 73 is connected to the long cross beam 151 of the skew compensation device 150 via the right end sheave 44 on the rear end side of the fourth sheave group 40 and the fourth sheave 54 of the fifth sheave group 50. Then, a triangle h is formed on a fourth rope-wrapping virtual surface (not shown) assumed at the rear end of the hanger 8 in the transverse direction.

  (8) The seventh rope 77 is skew compensated via the right end sheave 33 of the third sheave group 30, the left end sheave 43 on the rear end side of the fourth sheave group 40, and the third sheave 53 of the fifth sheave group 50. A triangle g is formed on a fourth rope-wrapping virtual surface (not shown) that is connected to the short transverse beam 152 of the device 150 and is assumed at the rear end of the hanger 8 in the transverse direction.

  (1) The triangles a to h will be described in more detail. As shown in FIG. 7, the triangle a has a hypotenuse x1 supported by the sheave 12 on the hanger 8 side and a sheave 21 on the trolley 6 side, a base y1 supported on the sheave 21 on the trolley 6 side, and a hanger 8 side. It is formed by the vertical side z1 supported by the sheave 12. p1 represents an apparent intersection of the base y1 and the vertical side z1.

  (2) The triangle b is supported by the slant side x2 supported by the sheave 11 on the hanging tool 8 side and the sheave 22 on the trolley 6 side, the bottom side y2 supported by the sheave 21 on the trolley 6 side, and the sheave 12 on the hanging tool 8 side. Formed by the vertical side z2. p2 represents an apparent intersection of the base y2 and the vertical side z2.

  (3) The triangle c is supported by the oblique side x5 supported by the sheave 13 on the suspension 8 side and the sheave 23 on the trolley 6 side, the bottom y5 supported by the sheave 23 on the trolley 6 side, and the sheave 13 on the suspension 8 side. The vertical side z5 is formed. p5 indicates an apparent intersection of the base y5 and the vertical side z5.

  (4) The triangle d is supported by the sheave 14 on the suspension 8 side and the oblique side x6 supported by the sheave 24 on the trolley 6 side, the upper side y6 supported by the sheave 24 on the trolley 6 side, and the sheave 14 on the suspension 8 side. The vertical side z6 is formed. p6 indicates an apparent intersection of the base y6 and the vertical side z6.

  (5) Further, as shown in FIG. 8, the triangle e has an oblique side x8 supported by the sheave 41 on the suspension 8 side and a sheave 51 on the trolley 6 side, an upper side y8 supported by the sheave 51 on the trolley 6 side, It is formed by the vertical side z8 supported by the sheave 41 on the hanging tool 8 side. p8 indicates an apparent intersection of the base y8 and the vertical side z8.

  (6) The triangle f is supported by the sheave 42 on the suspension 8 side and the oblique side x4 supported by the sheave 52 on the trolley 6 side, the upper side y4 supported by the sheave 52 on the trolley 6 side, and the sheave 42 on the suspension 8 side. Formed by the vertical side z4. p4 indicates an apparent intersection of the base y4 and the vertical side z4.

  (7) The triangle g is supported by the sheave 43 on the suspension 8 side and the oblique side x7 supported by the sheave 53 on the trolley 6 side, the upper side y7 supported by the sheave 53 on the trolley 6 side, and the sheave 43 on the suspension 8 side. Formed by the vertical side z7. p7 indicates an apparent intersection of the base y7 and the vertical side z7.

  (8) The triangle h is supported by the sheave 44 on the suspension 8 side and the oblique side x3 supported by the sheave 54 on the trolley 6 side, the upper side y3 supported by the sheave 54 on the trolley 6 side, and the sheave 44 on the suspension 8 side. Formed by the vertical side z3. p3 indicates an apparent intersection of the base y3 and the vertical side z3.

Moreover, since the triangles a to h are formed so as to satisfy the following expressions (1) to (3), they are congruent with each other. In addition, the bases y1 to y8 all face the trolley 6 side.
x1 = x2 = x3 = x4 = x5 = x6 = x7 = x8 (1)
y1 = y2 = y3 = y4 = y5 = y6 = y7 = y8 (2)
z1 = z 2 = z3 = z4 = z5 = z6 = z7 = z8 (3)

  9A is a diagram in which triangles a and c are patterned, FIG. 9B is a diagram in which triangles b and d are patterned, FIG. 9C is a diagram in which triangles e and g are patterned, and FIG. (D) is the figure which patterned the triangles f and h.

  As described above, the present invention is formed by eight (2 × 4 sets) ropes 71 to 78 arranged on four rope-wrapping virtual surfaces (not shown) assumed around the hanger 8. Since all the eight triangles a to h have a truss structure, it is possible to suppress the shaking of the container during traveling and traversing. In particular, at the center of the front end of the hanging tool 8 in the longitudinal direction, the two ropes 71 and 72 are hung so as to sandwich the sheaves 11 and 12 of the same axis from both sides, and at the center of the rear end of the hanging tool 8 in the longitudinal direction. Since the two ropes 75 and 76 are hung so as to sandwich the sheaves 13 and 14 having the same axis from both sides, the restraining force for suppressing the swing of the hanger 8 in the transverse direction (transverse direction) is increased.

  Next, the operation of the skew compensation device 150 will be described. As shown in FIG. 10, when the rod 154a of the electric cylinder 154 of the skew compensation device 150 is extended in the direction of the arrow R, the long and short links 151 and 152 rotate around the support shaft 156 like a two-dot chain line. .

  For this reason, the fourth rope 74 and the seventh rope 77 are drawn in the direction of the arrow s, the third rope 73 and the eighth rope 78 are drawn out in the direction of the arrow t, and the hoist 8 is clockwise around the axis O. Skew in the direction of the arrow.

  When the rod 154a of the electric cylinder 154 of the skew compensation device 150 is contracted in the direction opposite to the arrow R, the hanger 8 skews counterclockwise about the axis O.

  By the way, it is desirable that the sheaves located at both ends of the hypotenuses x1 to x8 of all the triangles a to h have the same sheave diameter on the trolley 6 side and the sheave diameter on the hanging tool 8 side. Moreover, it is desirable that the diameters of the sheaves 21 to 24 and 51 to 54 on the trolley 6 side are smaller than or equal to the diameters of the sheaves 11 to 14 and 41 to 44 on the hanging tool 8 side.

  The sheaves 21 to 24 and 51 to 54 on the trolley side are equalizer sheaves, and there is almost no passage of the rope when the lifting device 8 or the container 9 is raised or lowered, so the diameter of the sheaves 21 to 24 and 51 to 54 on the trolley 6 side Even if the diameter is smaller than the diameter of the sheaves 11 to 14 and 41 to 44 on the hanging tool 8 side, the rope life and the like are not adversely affected. In addition, the weight can be reduced.

  In addition, since the suspension tool 8 can be shifted in the lateral direction by the force of the differential tension of the ropes 71 and 72 and the force of the differential tension of the ropes 75 and 76, the downsizing of the single-head cylinder type tilting devices 115 and 116 is reduced. Is possible.

  In the above description, the case where the drum 16 is provided so as to be offset toward one end of the trolley 6 has been described, but the drum 16 may be installed at the center of the trolley 6. In this case, four sheaves facing the sheaves 31 to 34 provided on the non-drum side as the third sheave group 30 are additionally provided on the front side of the drum 16 to provide first to fourth ropes 71 to 74. To support each.

8 Suspension 16 Drum 71, 72 (75, 76), 74, 78 (73, 77) One set of two ropes x1, x2 (x5, x6), x4, x8 (x3, x7) hypotenuse 150 parallel link type Skew Compensator 151 Drum Side Link 152 Non-Drum Side Link

Claims (4)

In a crane that suspends a hanging tool by a plurality of ropes drawn from one drum, the first and second rope wrapping virtual surfaces assumed at the longitudinal ends of the hanging tool are two drawn from the drum 1 A pair of ropes are formed so as to form a triangle between the hanger and the trolley so that the respective hypotenuses face away from each other. On the rope wrapping virtual surface, a pair of ropes drawn from the drum forms a triangle between the hanger and the trolley and hangs so that each hypotenuse faces each other, making all the triangles congruent,
Furthermore, a parallel link type skew compensation device is provided on the trolley, and drum-side ropes arranged on the third and fourth rope winding virtual surfaces are attached to the drum-side link of the skew compensation device, and the anti-drum side A rope hanging structure for a crane, wherein a rope on the opposite side of the drum arranged on the third and fourth rope wrapping virtual surfaces is attached to the link. A drum provided at one end of the trolley, a first sheave group in which the axis is perpendicular to the axis of the drum and at the center of the end of the longitudinal direction of the lifting device, and a shaft is a sheave of the first sheave group. A second sheave group provided parallel to the shaft core and at the four corners of the trolley, a third sheave group provided with the shaft core parallel to the drum core and on the opposite side of the trolley, and the shaft core serving as the first sheave group A fourth sheave group that is orthogonal to the shaft core of the sheave and provided at the four corners of the lifting device, and a fifth sheave group that the shaft core is parallel to the shaft core of the drum and provided in the center of the trolley,
A first virtual wrapping virtual surface assumed at the end in the longitudinal direction of the hanger with a first and second set of ropes that suspend the hanger from the drum via the first and second sheave groups. A triangular shape is formed on the end of the lifting device in the longitudinal direction with a fifth and sixth set of ropes that support the lifting device from the drum via the third, first, and second sheave groups. Forming a triangle on the second rope wrapping virtual surface, and suspending a hanging tool from the drum via the fourth, fifth sheave group and the third, fourth, fifth sheave group. Form a triangle on the third and fourth rope wrapping virtual planes assumed at the end in the transverse direction of the hanger with a pair of ropes of 8 and 3rd and 7th and make all triangles congruent The crane rope hanging structure according to claim 1. A drum provided in the center of the trolley, a first sheave group in which the axis is perpendicular to the axis of the drum and in the center of the end in the longitudinal direction of the lifting device, and a shaft is a sheave of the first sheave group. A second sheave group parallel to the shaft core and provided at the four corners of the trolley, a third sheave group whose shaft core is parallel to the shaft core of the drum and provided at both ends of the trolley, and the shaft core of the first sheave group. A fourth sheave group orthogonal to the shaft core of the sheave and provided at the four corners of the lifting device, and a fifth sheave group provided in the center of the trolley with the shaft core parallel to the shaft core of the drum,
A pair of first, second, fifth, and sixth ropes that suspend the suspension device from the drum via the third, first, and second sheave groups at the longitudinal end of the suspension device. 4th, 8th and 3rd which form a triangle in the assumed 1st, 2nd rope winding virtual surface, and suspend a suspension tool from the said drum via the 3rd, 4th, 5th sheave group. The third and fourth rope wrapping imaginary planes assumed at the lateral ends of the hanger with each of the seventh pair of ropes form a triangle, and all the triangles are congruent. The crane rope hanging structure according to claim 1.   The crane rope hanging structure according to any one of claims 1 to 3, wherein the bases of all triangles formed by a rope hung between the trolley and the suspension are positioned on the trolley side.

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