JP5457060B2 - Crane rope hanging structure - Google Patents

Description

  The present invention relates to a rope hanging structure of a crane that handles containers for marine transportation.

  As a rope hanging structure of a crane that handles containers for marine transportation, conventionally, a wire-leaving structure of a crane in which ropes are arranged in a V shape on each of four virtual wrapping surfaces constituting the side of an inverted pyramid, or a rectangular parallelepiped There is known a cargo handling lifting / lowering device in which ropes are arranged in an X shape on four rope-wrapping virtual surfaces constituting the side surface (see, for example, Patent Document 1 or 2).

  Patent Document 1 does not describe a method for adjusting the rope tension when the shift and skew of the container are operated from the beginning to the wire leaving structure. On the other hand, Patent Document 2 describes means for forcibly controlling the shift and skew of a container. However, a plurality of actuators must be operated in conjunction with each other by using hydraulic pressure or the like. If it is not performed precisely, there is a drawback that shake occurs.

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

  An object of the present invention is to provide a crane rope-hanging structure that can stop the runout in the shift direction and automatically adjust the rope tension when the spreader (hanger) is skewed without applying an external force.

(1) The crane rope hanging structure of the present invention comprises a trolley having one drum and a plurality of sheaves, and a lifting device having a plurality of sheaves, and the suspension is provided by a plurality of ropes drawn from the drum. In the crane in which the tool is suspended, on each virtual wrapping virtual surface assumed at the longitudinal front and rear end portions of the lifting tool, these ropes are a set of two ropes drawn from the drum. A triangle is formed between the hanger and the trolley, and the hypotenuses are oriented in directions away from each other, and the sheaves in the middle of the hanger transverse direction on each rope wrapping virtual surface are sandwiched from both sides On the other hand, in each rope-wrapping virtual surface assumed at both ends in the transverse direction of the hanging tool, one set of two drawn from the drum Rope, all the triangles in such a manner that the congruent its hypotenuse with these ropes to form respective triangular between said trolley and said hanger is spanned so as to face each other, and, in the transverse direction of the trolley A link-type skew compensation device is formed by a pair of spaced rope operation plates, a support shaft that pivotally supports each rope operation plate, and a connecting member that connects the rope operation plates . A set of two ropes of the virtual wrapping surface of the rope is attached to the rope operation plate on the same side of the link type skew compensation device, and a pair of ropes of the virtual wrapping surface of the other rope is connected to the rope type skew compensation device. It is characterized by being mounted on the rope operation plate on the same side .

(2) The rope hanging structure of the crane according to the present invention is the drum provided at one end in the longitudinal direction of the trolley in the above (1), the shaft core being perpendicular to the drum core and the longitudinal direction of the lifting tool. The first sheave group provided at the center part in the transverse direction of the lifting tool at both ends, the second sheave group having the shaft core parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, the shaft core being the drum core A third sheave group parallel to the trolley on the side opposite to the drum, and a fourth sheave group whose axis is perpendicular to the axis of the sheave of the first sheave group and is provided at the four corners of the lifting device. A fifth sheave group that is parallel to the axis and provided in the center of the trolley, and a sixth sheave group that is parallel or substantially parallel to the top surface of the trolley and that is associated with the fifth sheave group,
A first and second set of ropes that suspend a suspension tool from the drum via the first and second sheave groups, and a suspension tool from the drum via the third, first, and second sheave groups. A fifth set of ropes for suspending the first and sixth ropes, and suspending a suspension tool from the drum via the fourth, fifth and sixth sheave groups and the third, fourth and fifth sheave groups. A third set of ropes, a fourth set of ropes, and a third set of ropes that suspend a suspension from the drum via a fourth, fifth and sixth sheave group and a third, fourth and fifth sheave group. A pair of ropes form a triangle between the trolley and the suspension, all the triangles are congruent, a pair of rope operation plates are pivotally supported on the trolley, and one rope operation Attach the 4th and 8th set of ropes to the front end of the plate and the front end of the other rope operation plate A set of ropes of the third and seventh attached, further, is characterized in the provision of the skew compensation device link type linked to the rear end portion with each other in the rope operation plate by a connecting member.

(3) The rope hanging structure of the crane of the present invention is the drum provided in the central portion in the longitudinal direction of the trolley in the above (1), the axial center of which is perpendicular to the axial center of the drum and the longitudinal direction of the lifting tool. The first sheave group provided at the center part in the transverse direction of the lifting tool at both ends, the second sheave group having the shaft core parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, the shaft core being the drum core The third sheave group parallel to the trolley and at both ends of the trolley, the fourth sheave group whose axis is perpendicular to the sheave axis of the first sheave group and at the four corners of the lifting device, the axis is the drum axis A fifth sheave group that is parallel to the core and provided in the center of the trolley, and a sixth sheave group that has a sheave surface parallel to or substantially parallel to the top surface of the trolley and associated with the fifth sheave group,
A first and second set of ropes and a fifth and sixth set of ropes for suspending a hanging tool from the drum via the third, first and second sheave groups, and a third from the drum. 4th, 5th and 6th sheave groups and 4th and 8th set of ropes and 3rd and 7th 1 to suspend the suspension tool via the 3rd, 4th and 5th sheave groups. A pair of ropes form a triangle between the trolley and the suspension, all the triangles are congruent, and a pair of rope operation plates are pivotally supported on the trolley, and one rope operation plate 4th and 8th set of ropes are attached to the front end of the rope, the 3rd and 7th set of ropes are attached to the front end of the other rope operation plate, and the rear end of each rope operation plate A link-type skew compensation device is provided in which the parts are connected by a connecting member. It is intended.

  (4) The rope hanging structure of the crane according to the present invention is the above-described (1), (2) or (3), wherein the base of all the triangles formed by the rope spanned between the trolley and the suspension is placed on the trolley side. It is characterized by being located in

The crane rope hanging structure of the present invention includes a trolley having one drum and a plurality of sheaves, and a suspension device having a plurality of sheaves, and the suspension device is suspended by a plurality of ropes drawn from the drum. In the crane as described above, in the rope wrapping virtual surface assumed at the front and rear end portions in the longitudinal direction of the hanger, a pair of ropes drawn from the drum is connected between the hanger and the trolley. each pass over to face the direction in which the oblique side away from each other to form a triangle, while the two in the assumed rope winding virtual surface, is pulled out from the drum to the front and rear end portions of the lateral side direction of the hanging member Hanging a pair of ropes so that each of these ropes forms a triangle between the hanger and trolley and their hypotenuses face each other All the triangles are congruent, so all the 8 ropes (2 x 4 sets) included in the four rope wrapping virtual planes assumed around the suspension have a truss structure. The suppression force which suppresses the running | running | working of the suspended load hold | gripped by the lifting implement and the swing of the transverse direction came to improve more.

  In particular, the present invention provides a pair of rope operation plates that are pivotally supported on the trolley, and two rope operation virtual surfaces that are assumed on the front end portions of the respective rope operation plates at the end portions in the transverse direction of the hanger. Since a link type skew compensator is provided in which a pair of ropes are attached and the rear ends of each rope operation plate are connected by a connecting member, the rope tension is applied by the connecting member of the skew compensator when a skew occurs. It has been automatically adjusted, and can now cope with the skew of the lifting equipment with the steady rest function. Further, when the running direction shake occurs, the link-type rope operation plate can suppress the change in the rope tension, thereby suppressing the running direction (longitudinal direction) swing of the hanger.

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 side view of a single-head cylinder type tilting device. It is a top view and action explanatory view of a rope tension automatic adjustment mechanism. It is a mechanism figure of a rope tension automatic adjustment mechanism. It is a schematic diagram of a rope hanging structure from the direction of arrow A in FIG. It is a schematic diagram of a rope hanging structure from the arrow B direction of FIG. (A)-(d) It is a pattern figure of a triangle. It is a side view of a double-headed cylinder type tilting device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the transfer crane 1 has a crane main body 2 formed in a gate shape, and advances in the container storage zone in the direction of arrow E by four sets of front and rear rubber tires 4 provided on the legs 3. . Moreover, the transfer crane 1 includes a trolley 6 that moves forward in the direction of arrow F on the girder 5 on the upper part of the crane body, and a plurality of wire ropes (hereinafter referred to as drums) drawn from a drum (not shown) on the trolley 6. The hanger 8 is hung by 7).

  The transfer crane 1 moves backward in the direction opposite to the arrow E, while the trolley 6 moves backward in the direction opposite to the arrow F. Reference numeral 9 denotes a container for sea transportation.

  As shown in FIG. 2, the trolley (not shown) has one drum 16 having eight (2 × 4 sets) ropes, the axis is parallel to the axis of the first sheave group 10, and The second sheave group 20 provided at the four corners of the trolley 6, the third core group 30 provided with the axis parallel to the axis of the drum 16 and on the opposite side of the trolley 6, and the axis as the axis of the drum 16. And a sixth sheave group 60 provided at the center of the trolley 6 and a sixth sheave group 60 whose sheave surface is parallel or substantially parallel to the top surface of the trolley and associated with the fifth sheave group.

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

  The fifth sheave group 50 is composed of two groups of first and second sheaves 51 and 52 and third and fourth sheaves 53 and 54. The first and second sheaves 51 and 52 are The third and fourth sheaves 53 and 54 are provided on the backward side of the trolley. The first and second sheaves 51 and 52 and the third and fourth sheaves 53 and 54 are supported by the same shaft, but the first and second sheaves 51 and 52 can be hung if desired. 8 may be separated in the longitudinal direction (arrow E direction). At that time, the third and fourth sheaves 53 and 54 are separated in the longitudinal direction of the hanger 8 in the same manner as the first and second sheaves 51 and 52.

  As shown in FIG. 2, the trolley (not shown) 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 opposite drum side. The former slides the arm 123 provided at the connecting portion of the first and second ropes 71 and 72 in parallel to the drum 16, and the latter provides the arm provided at the connecting portion of the fifth and sixth ropes 75 and 76. 123 is slid in parallel to the drum 16. As shown in FIG. 3, these tilting devices 115 and 116 are configured to slide the single-head cylinder 122 back and forth by an electric motor 121 as indicated by arrows.

  Further, as shown in FIG. 2, the trolley includes a rope tension automatic adjustment mechanism 100 as a link-type skew compensation device on the opposite drum side. The rope tension automatic adjustment mechanism 100 includes a pair of left and right first and second rope operation plates 124, 125 provided at a predetermined interval in the transverse direction of the trolley, and the first and second rope operation plates 124, The support shafts 126 and 126 that pivotably support the 125 and the link-like connecting members 127 that connect the rear end portions of the first and second rope operation plates 124 and 125 are configured.

  As shown in FIG. 4, the first rope operation plate 124 includes rope attachment mounting holes 131 and 132 on both sides of the support shaft 126, and the rope attachment (see FIG. The rope 78 is attached via a rope attachment (not shown), and the rope 74 is attached to the right rope attachment attachment hole 132 via a rope attachment (not shown). In addition, the second rope operation plate 125 includes rope attachment mounting holes 133 and 134 on both sides of the support shaft 126, and the rope attachment (not shown) is inserted into the left rope attachment attachment hole 133. The rope 73 is attached, and the rope 77 is attached to the right rope attachment attachment hole 134 via a rope attachment (not shown). Further, the connecting member 127 is pivotally supported on the rope operation plates 124 and 125 by support shafts 135 and 135.

  More specifically, as shown in FIG. 5, the rope tension automatic adjusting mechanism 100 includes a support shaft 126 that pivotally supports the first rope operation plate 124 and rope attachment mounting holes 131 and 132 provided on both sides thereof. On the other hand, the support shaft 126 that pivotally supports the second rope operation plate 125 and the rope attachment mounting holes 133 and 134 provided on both sides thereof are positioned on a straight line. Further, as shown in FIG. 5, intervals i and j from the center of the left support shaft 126 to the centers of the rope attachment mounting holes 131 and 132, and the rope attachment attachment hole from the center of the right support shaft 126. The intervals m and n reaching the centers of 133 and 134 are all equally spaced. In addition, a pair of left and right first and second rope operation plates 124 and 125, two support shafts 126 and 126 that pivotally support these rope operation plates 124 and 125, and the first and second rope operation plates 124. , 125 and the connecting member 127 that connects the rear ends of the two parts constitute a parallelogram.

  In addition, as a shape of the 1st, 2nd rope operation boards 124 and 125, shapes, such as a home base or an isosceles triangle, are preferable, for example.

  As shown in FIG. 2, the drum 16 is installed at one side end on the trolley corresponding to the front end in the longitudinal direction of the hanger 8. Further, the drum 16 includes a first and a second set of ropes 71 and 72, a third, a first and a second sheave that support the suspension 8 via the first and second sheave groups 10 and 20. A fifth and sixth set of ropes 75 and 76, a fourth, a fifth and a sixth sheave group 40, 50 and 60 and a third, which suspend the hanger 8 via the groups 30, 10 and 20; 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 the fourth, fifth and sixth sheave groups 40, 50, 60 and third, fourth, and fifth sheave groups 30, 40, 50, and third and seventh two sets of ropes 73, 77 that support the hanging tool 8 are provided.

  More specifically, when viewed from the direction of arrow A, the first rope 71 will be described later via 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. Connected to the second rope 72, a triangle a is formed between the hanger 8 and a trolley (not shown).

  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 between them.

  The fifth rope 75 is described later via the sheave 31 at the center of the third sheave group 30, the front sheave 13 at the rear end side of the first sheave group 10, and the rear left end sheave 23 of the second sheave group 20. 6 is connected to the rope 76 and forms a triangle c between the hanger 8 and the trolley.

  The sixth rope 76 passes through the sheave 32 at the center 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. And a triangle d is formed between the hanger 8 and the trolley.

  On the other hand, when viewed from the direction of the arrow B, the fourth rope 74 has the right sheave 42 on the front end side of the fourth sheave group 40, the second sheave 52 of the fifth sheave group 50, and the sixth sheave group 60. It is connected to the right end (right end as viewed from the direction of arrow A) of the rope operation plate 124 via the one sheave 61, and a triangle f is formed between the hanger 8 and the trolley.

  The eighth rope 78 passes through 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, and the left end of the rope operation plate 124. And a triangle e is formed between the hanger 8 and the trolley.

  The third rope 73 passes through the right sheave 44 on the rear end side of the fourth sheave group 40, the fourth sheave 54 of the fifth sheave group 50, and the second sheave 62 of the sixth sheave group 60. 125 is connected to the left end (left end when viewed from the direction of arrow A), and a triangle h is formed between the hanger 8 and the trolley.

  The seventh rope 77 is connected to the rope operation plate 125 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. Connected to the right end, a triangle g is formed between the hanger 8 and the trolley.

  Here, the triangles a to h will be described in detail. As shown in FIG. 6, the triangle a has an oblique side x <b> 1 supported by the sheave 12 on the suspension 8 side and the sheave 21 on the trolley side, a base y <b> 1 supported on the sheave 21 on the trolley side, and a sheave 12 on the suspension 8 side. It is formed by the vertical side z1 supported by. p1 represents an apparent intersection of the base y1 and the vertical side z1.

  The triangle b is a hypotenuse x2 supported by the sheave 11 on the suspension 8 side and the sheave 22 on the trolley side, a base y2 supported on the sheave 21 on the trolley side, and a vertical side z2 supported on the sheave 12 on the suspension 8 side. It is formed by. p2 represents an apparent intersection of the base y2 and the vertical side z2.

  The triangle c includes an oblique side x5 supported by the sheave 13 on the suspension 8 side and the sheave 23 on the trolley side, a base y5 supported on the sheave 23 on the trolley side, and a vertical side z5 supported on the sheave 13 on the suspension 8 side. It is formed by. p5 represents an apparent intersection of the base y5 and the vertical side z5.

  The triangle d has an oblique side x6 supported by the sheave 14 on the suspension 8 side and the sheave 24 on the trolley side, an upper side y6 supported by the sheave 24 on the trolley side, and a vertical side z6 supported by the sheave 14 on the suspension 8 side. It is formed by. p6 represents an apparent intersection of the base y6 and the vertical side z6.

  Further, as shown in FIG. 7, the triangle e has an oblique side x8 supported by the sheave 41 on the suspension 8 side and the sheave 51 on the trolley side, an upper side y8 supported by the sheave 51 on the trolley side, and the suspension 8 side. It is formed by a vertical side z8 supported by the sheave 41. p8 represents an apparent intersection of the base y8 and the vertical side z8.

  The triangle f includes an oblique side x4 supported by the sheave 42 on the suspension 8 side and the sheave 52 on the trolley side, an upper side y4 supported by the sheave 52 on the trolley side, and a vertical side z4 supported by the sheave 42 on the suspension 8 side. It is formed by. p4 indicates an apparent intersection of the base y4 and the vertical side z4.

  The triangle g includes an oblique side x7 supported by the sheave 43 on the suspension 8 side and the sheave 53 on the trolley side, an upper side y7 supported on the sheave 53 on the trolley side, and a vertical side z7 supported on the sheave 43 on the suspension 8 side. It is formed by. p7 represents an apparent intersection of the base y7 and the vertical side z7.

  The triangle h is an oblique side x3 supported by the sheave 44 on the suspension 8 side and the sheave 54 on the trolley side, an upper side y3 supported by the sheave 54 on the trolley side, and a vertical side z3 supported by the sheave 44 on the suspension 8 side. It is formed by. p3 represents 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)

  8A is a diagram in which triangles a and c are patterned, FIG. 8B is a diagram in which triangles b and d are patterned, FIG. 8C 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 included in the four rope-wrapping virtual surfaces (not shown) assumed around the hanger 8. Since all of the eight triangles a to h have a truss structure, there is a restraining force that suppresses the shift and skew of the hanger 8 or a suspended load held by the hanger 8 (hereinafter simply referred to as the hanger 8). Improves than before. In particular, at the center of the longitudinal end of the hanging tool 8, the two ropes 71 and 12 are hung so as to sandwich the sheaves 11 and 12 having the same axis from both sides, and the two ropes 75 and 76 have the same axis. Since the sheaves 13 and 14 are hung from both sides, the restraining force for suppressing the swinging of the hanging tool 8 in the lateral direction (transverse direction) is increased.

  According to the present invention, the rolling device 8 or the suspended load held by the hanging device 8 (hereinafter simply referred to as the hanging device 8) is hardly generated when the trolley is traversed. 116 can be stopped quickly by synchronizing the cylinder 120 of the hoisting tool 8 with the swinging of the hoisting tool 8. Further, by sliding the cylinders 120 of the tilting devices 115 and 116 in the same direction, it is possible to forcibly shift the hanger 8 in the transverse direction, that is, in the transverse direction of the trolley.

  Further, in the present invention, when the hoist 8 is skewed in the clockwise direction by sliding the cylinders 120 of the tilting devices 115 and 116 in different directions, the ropes 78 and 73 are moved in the direction of the arrow s as shown in FIG. On the other hand, the ropes 74 and 77 are loosened in the direction of the arrow t, and the first and second rope operation plates 124 and 125 are rotated counterclockwise about the support shaft 126, and a connecting member 127 that connects the two is provided. Slide in the direction of arrow L.

  On the contrary, when the hoist 8 is skewed counterclockwise, as shown in FIG. 4, the ropes 78 and 73 are pulled in the direction of the arrow t ′, while the ropes 74 and 77 are loosened in the direction of the arrow s ′. The rope operation plates 124 and 125 rotate clockwise about the support shaft 126, and the connecting member 127 that connects both slides in the direction of the arrow L ′. For this reason, the rope tension is automatically adjusted by the function of the rope tension automatic adjustment mechanism 100, and the rope length can follow the skew operation of the tilting devices 115 and 116.

  Moreover, when the swing of the traveling method (longitudinal direction) of the hanger 8 occurs, the rope tension automatic adjustment mechanism 100 brakes the change in the rope length, so that the swing of the hanger 8 in the traveling direction can be suppressed. it can.

  At this time, the sheaves located at both ends of the hypotenuses x1 to x8 of all the triangles a to h have the same diameter on the trolley side and the diameter on the suspension side, and the sheaves 21 to 24 and 51 to 54 on the trolley side. It is desirable that the diameter of each of the sheaves 11 to 14 and 41 to 44 on the lifting tool side be smaller or the same.

  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 at the time of lifting or lowering of the suspended load or the suspended load held by the hanger, so the sheaves 21 to 24 and 51 on the trolley side Even if the diameter of .about.54 is made smaller than the diameter of the sheaves 11-14 and 41.about.44 on the suspension 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 by the force of the rope tension difference, the single-head cylinder tilting devices 115 and 116 can be downsized.

  In the above description, the case where the drum 16 is offset from one end of the trolley has been described. However, the drum 16 may be installed at the center of the trolley. In this case, four sheaves whose supporting shafts are parallel to the axis of the drum 16 are additionally provided as the third sheave group 30 so as to face the sheaves 31 to 34 provided on the side opposite to the drum. Four ropes 71 to 74 are supported.

  It is also possible to apply a double-headed cylinder type tilting device 111 instead of the single-headed cylinder type tilting devices 115 and 116. As shown in FIG. 9, the double-headed cylinder type tilting device 111 slides the double-headed cylinder 120 in the direction of the arrow by an electric motor 119. In the case of the double-headed cylinder type tilting device 111, ropes are attached to both ends of the double-headed cylinder 120 via brackets or the like.

6 Trolley 8 Lifting tool 16 Drum 78, 74 or 73, 77 A set of two ropes 100 Rope tension automatic adjustment mechanism 124, 125 Rope operation plate 127 Connecting member

Claims (4)

A crane comprising: a trolley having one drum and a plurality of sheaves; and a suspension having a plurality of sheaves, wherein the suspension is suspended by a plurality of ropes drawn from the drum. In each of the virtual wrapping surfaces envisaged at both front and rear ends in the longitudinal direction of the rope, a pair of ropes drawn from the drum forms a triangle between the rope and the trolley. And the direction of the oblique sides are separated from each other, and the rope is wrapped around so as to sandwich the sheave at the center part of the hanger lateral direction in the virtual wrapping surface from both sides,
On the other hand, in each rope winding virtual surface assumed at both ends in the transverse direction of the hanging tool, a pair of ropes drawn from the drum is connected between the hanging tool and the trolley. A triangle is formed so that the hypotenuses face each other so that all triangles are congruent, and a pair of rope operation plates separated in the transverse direction of the trolley and each rope operation plate are rotated. A link-type skew compensation device is formed by a support shaft that freely supports and a connecting member that connects the rope operation plates, and a pair of ropes on one rope-wrapping virtual surface is linked by a link-type skew compensation. mounted on the same side of the rope operation plate of the device, mounted two pair of rope of the other rope winding virtual plane on the same side of the rope operation plate of the link-type skew compensation device Rope hanging structure of the crane characterized by Rukoto. Drum provided at one end portion in the longitudinal direction of the trolley, first sheave group provided in the central portion of the lifting tool transverse direction at both ends in the longitudinal direction of the lifting device in a direction in which the shaft core is orthogonal to the axial center of the drum Is a second sheave group that is parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, a third sheave group that the shaft core is parallel to the shaft core of the drum and that is provided on the opposite side of the trolley, and the shaft core Is a fourth sheave group orthogonal to the sheave axis of the first sheave group and provided at the four corners of the lifting device, and a fifth sheave group provided in the center of the trolley with the axis parallel to the axis of the drum and the sheave. A sixth sheave group whose surface is parallel or substantially parallel to the top surface of the trolley and associated with the fifth sheave group,
A first and second set of ropes that suspend a suspension tool from the drum via the first and second sheave groups, and a suspension tool from the drum via the third, first, and second sheave groups. A fifth set of ropes for suspending the first and sixth ropes, and suspending a suspension tool from the drum via the fourth, fifth and sixth sheave groups and the third, fourth and fifth sheave groups. A third set of ropes, a fourth set of ropes, and a third set of ropes that suspend a suspension from the drum via a fourth, fifth and sixth sheave group and a third, fourth and fifth sheave group. A pair of ropes form a triangle between the trolley and the suspension, all the triangles are congruent, a pair of rope operation plates are pivotally supported on the trolley, and one rope operation Attach the 4th and 8th set of ropes to the front end of the plate and the front end of the other rope operation plate The link-type skew compensation apparatus according to claim 1, wherein a third set of ropes and a seventh set of ropes are mounted, and a rear end portion of each rope operation plate is connected by a connecting member. Crane rope hanging structure. Drum provided at the center of the trolley in the longitudinal direction, first sheave group provided at the center of the suspender lateral direction at both ends in the longitudinal direction of the suspender in the direction in which the axis is perpendicular to the axis of the drum and the shaft Is a second sheave group that is parallel to the sheave shaft core of the first sheave group and at the four corners of the trolley, a third sheave group that is parallel to the shaft core of the drum and at both ends of the trolley, and the shaft core is A fourth sheave group orthogonal to the sheave axis of the first sheave group and provided at the four corners of the lifting device, a fifth sheave group provided in the center of the trolley with the shaft core parallel to the axis of the drum, and the sheave surface Comprises a sixth sheave group that is parallel or substantially parallel to the top surface of the trolley and is associated with the fifth sheave group,
A first and second set of ropes and a fifth and sixth set of ropes for suspending a hanging tool from the drum via the third, first and second sheave groups, and a third from the drum. 4th, 5th and 6th sheave groups and 4th and 8th set of ropes and 3rd and 7th 1 to suspend the suspension tool via the 3rd, 4th and 5th sheave groups. A pair of ropes form a triangle between the trolley and the suspension, all the triangles are congruent, and a pair of rope operation plates are pivotally supported on the trolley, and one rope operation plate 4th and 8th set of ropes are attached to the front end of the rope, the 3rd and 7th set of ropes are attached to the front end of the other rope operation plate, and the rear end of each rope operation plate A link-type skew compensation device is provided in which the parts are connected by a connecting member. Rope hanging structure of the crane of claim 1, wherein.   4. The rope hanging structure for a crane according to claim 1, wherein the bases of all the triangles formed by a rope suspended between the trolley and the suspension are located on the trolley side.

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