WO2010061645A1

WO2010061645A1 - Rope reeving structure for crane

Info

Publication number: WO2010061645A1
Application number: PCT/JP2009/056388
Authority: WO
Inventors: 栢菅　信哉
Original assignee: 三井造船株式会社
Priority date: 2008-11-26
Filing date: 2009-03-27
Publication date: 2010-06-03
Also published as: CN102224098A; CN102224098B; JP4303777B1; JP2010126289A

Abstract

A rope reeving structure simply constructed, highly responsive, and capable of coping with high lifting height and high speed applications. Two sets of ropes (71, 72, and 75, 76), each set being composed of two ropes (71, 72, or 75, 76), pulled out of a drum (16) are mounted at longitudinally opposite ends of a lifting device (8) such that the ropes (71, 72, and 75, 76) form triangles (a-d) between the lifting device (8) and a trolley (6) and such that the oblique sides (x1 (x5), x2 (x6)) of triangles face directions separating from each other. Two sets of ropes (74, 78, and 73, 77), each set being composed of two ropes (74, 78, or 73, 77), pulled out of the drum (16) are mounted at lateral opposite ends of the lifting device (8) such that the ropes (74, 78, and 73, 77) form triangles (e-h) between the lifting device (8) and the trolley (6) and such that the oblique sides (x8 (x4), x7 (x3)) of triangles face each other. All the triangles (a-h) formed by the ropes (71-78) are in congruence.

Description

Crane rope hanging structure

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

Conventionally, as a rope hanging structure of a crane handling containers for marine transportation, the wire leaving of a crane in which ropes are arranged in a V-shape on at least four rope-wrapping virtual surfaces constituting the sides of a virtual inverted pyramid. A structure or a tilting device for a rope-hanging suspension beam is known (for example, see Patent Document 1 or 2). Furthermore, a cargo handling elevating device is known in which ropes are arranged in a truss shape on at least four rope-wrapping virtual surfaces constituting the side surface of a virtual rectangular parallelepiped (see, for example, Patent Document 3).

Although the wire-leaving structure described in Patent Document 1 is said to cause almost no container shake, a suspension point is formed at the center in the longitudinal direction of the spreader (suspender) due to roping restrictions. Fourthly, a structure called a head block is required, and the manufacturing cost increases due to the increase in weight.

In Patent Document 2, similarly to Patent Document 1, a suspension point is formed at the center portion in the longitudinal direction of the spreader due to roping restrictions, and a head block is required (weight increase). In addition, since the trolley includes two drums and a moving frame that moves in the lateral direction on the trolley, the weight of the trolley increases and the manufacturing cost increases.

In Patent Document 3, a first displacement mechanism (see FIG. 9) is provided at the end of the trolley corresponding to the end in the longitudinal direction of the hanger, and an additional trolley end corresponding to the end of the hanger in the lateral direction is added. Displacement means (see FIG. 7) is provided. However, in the first displacement mechanism, two damping cylinders are provided opposite to the connecting rod that holds the free end of the rope, and rope force compensation cylinders are provided at the segment levers provided at both ends of the connecting rod. Therefore, the production cost becomes high.

On the other hand, since the additional displacement means (see FIG. 7) operates only one of the two pairs of ropes, the responsiveness is not necessarily high. Further, in Patent Document 3, the lower roller whose axis is facing the longitudinal direction of the spreader and the lower roller whose axis is facing the lateral direction of the spreader are concentrated at the four corners of the spreader (see FIG. 2). It is necessary to make the four corners of the spreader sturdy (weight increase).
Japanese Patent No. 3268224 Specification Japanese micro application No. 47-91210 (No. 49-49667) Japanese National Table No. 10-507435

The present invention is to provide a crane rope hanging structure that is simple in structure and low in cost, has high responsiveness and swing suppression force, and can cope with high lift and high speed.

The crane rope hanging structure of the present invention includes a trolley having one drum and a plurality of sheaves, and a hanging tool having a plurality of sheaves, and the lifting tool is provided below the trolley by a rope drawn from the drum. In the suspended crane, the rope winding virtual surface assumed at both ends in the longitudinal direction of the hanging tool is a pair of two ropes drawn from the drum, and these ropes are respectively triangular between the hanging tool and the trolley. And a pair of ropes drawn out from the drum on the virtual wrapping surfaces assumed at both ends in the transverse direction of the hanger. , These ropes form a triangle between the hanger and the trolley, and the slant sides of the ropes face each other, and Is characterized in that congruent all of the triangle formed by the serial rope.

The crane rope hanging structure of the present invention includes a drum provided at one end of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting device in a direction in which the shaft core is orthogonal to the shaft core of the drum, and a shaft A second sheave group whose core 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 whose shaft core is parallel to the shaft core of the drum and provided on the opposite side of the trolley, and shaft A fourth sheave group whose core is orthogonal to the sheave shaft core of the first sheave group and provided at the four corners of the lifting device, and a fifth sheave group whose shaft core is parallel to the drum core and at the center of the trolley. A first and a second set of ropes that suspend a suspension tool from the drum via the first and second sheave groups, and from the drum via the third, first and second sheave groups. 5th and 6th set of ropes for hanging the hoisting tool, the fourth to fifth from the drum 4th and 8th set of ropes for suspending the suspension device through the groove group and the third, fourth and fifth sheave groups, the fourth, fifth sheave group and the third, A third and a seventh pair of ropes for supporting the suspension device via the fourth and fifth sheave groups, and each rope forms a triangle between the trolley and the suspension device, To do.

The crane rope hanging structure of the present invention includes a drum provided at one end of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting tool in the direction in which the shaft core is orthogonal to the shaft core of the drum, and the shaft A second sheave group whose core 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 whose shaft core is parallel to the shaft core of the drum and on the side opposite to the drum of the trolley, A fourth sheave group in which the shaft core is perpendicular to the shaft core of the sheave of the first sheave group and provided at the four corners of the lifting device, and a fifth sheave group in which the shaft core is parallel to the shaft core of the drum and provided in the center of the trolley A sixth sheave group having a sheave surface parallel to or substantially parallel to the upper surface of the trolley and attached to the fifth sheave group, and a first suspension unit that suspends a suspension tool from the drum via the first and second sheave groups. And a second set of ropes from the drum, third, first and A pair of fifth and sixth ropes that suspend the suspension tool through two sheave groups, from the drum through fourth, fifth and sixth sheave groups and third, fourth and fifth sheave groups The fourth and eighth sets of ropes for supporting the suspension, and the suspension from the drum via the fourth, fifth and sixth sheave groups and the third, fourth and fifth sheave groups. A third set of ropes and a seventh set of ropes to be supported are provided, and each rope forms a triangle between the trolley and the hanger.

The crane rope hanging structure of the present invention includes a drum provided at the center of the trolley, a first sheave group provided at the center of both ends in the longitudinal direction of the lifting device in the direction in which the shaft core is orthogonal to the shaft core of the drum, and the shaft Second sheave group with cores parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, Third sheave group with shaft cores parallel to the shaft core of the drum and at both ends of the trolley, shaft core Includes a fourth sheave group that is orthogonal to the sheave shaft core of the first sheave group and is provided at the four corners of the lifting device, and a fifth sheave group that the shaft core is parallel to the drum shaft core and provided at the center of the trolley. The first and second sets of ropes, and the fifth and sixth sets of ropes for hanging the lifting tool from the drum via the third, first and second sheave groups, 4th and 8th set which suspends a suspension tool via the 3rd, 4th and 5th sheave groups And a rope, as well as the third and seventh set of rope, and one in which each rope and forming a triangle between the tool hanging the trolley.

The crane rope hanging structure of the present invention includes a drum provided in the center of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting device in a direction in which the shaft core is orthogonal to the shaft core of the drum, and a shaft Second sheave group with cores parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, Third sheave group with shaft cores parallel to the shaft core of the drum and at both ends of the trolley, 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. And 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, and a suspension unit that suspends a suspension tool from the drum via the third, first, and second sheave groups. 1st and 2nd set of ropes and 5th and 6th set of rows A fourth and eighth set of ropes for hanging a suspension from the drum via the third, fourth, fifth and sixth sheave groups and the third, fourth and fifth sheave groups; 3 and a seventh set of ropes, and each rope forms a triangle between the trolley and the hanger.

The crane rope hanging structure of the present invention connects two ends of a pair of ropes respectively, and slides the connecting portion in the horizontal direction by a tilting device, whereby the suspended load held by the hanging tool or the hanging tool. Is characterized in that it can be skewed or shifted.

The rope hanging structure of the crane according to the present invention includes the diameter of the sheave on the trolley side and the sheave on the suspension side of the sheaves located at both ends of the hypotenuses of all triangles formed by the rope spanned between the trolley and the suspension. The diameters of each are the same.

The rope hanging structure of the crane of the present invention is such that the sheave diameter of the sheaves located at both ends of the hypotenuses of all triangles formed by the rope spanned between the trolley and the suspension is the sheave diameter on the suspension side. It is characterized by being smaller than.

The crane rope hanging structure of the present invention is characterized in that the bases of all the triangles formed by the rope hung between the trolley and the suspension are positioned on the trolley side.

In the present invention, the rope wrapping virtual surfaces assumed at both ends in the longitudinal direction of the hanger form a pair of two ropes drawn from the drum, and these ropes form a triangle between the hanger and the trolley, respectively. In addition, the ropes are routed so that the hypotenuses face in directions away from each other, and the rope wrapping virtual surfaces assumed at both ends in the transverse direction of the hanging tool are used as a set of two ropes drawn from the drum. The ropes form triangles between the suspenders and the trolley, and the slant sides of the ropes face each other, and all the triangles formed by the ropes are congruent. The eight ropes (2 x 4 sets) included in the four rope-wrapping virtual planes all have a truss structure, which suppresses the swinging of the suspension or the suspended load held by the suspension. It can be.

In particular, at the center of both ends in the longitudinal direction of the hanger, two ropes that are bridged vertically are hung so as to sandwich two sheaves of the same axis from both sides. It exerts a higher suppression force that suppresses the shaking of the suspended load in the transverse direction. For this reason, not only does the swing of the hanging tool or the suspended load held by the hanging tool hardly occur, but even if the swing occurs, the swing can be converged in a short time.

Further, according to the present invention, not only the structure is simple and the cost is low, but also a high head and a high speed can be coped with. Further, according to the present invention, a pair of two ropes are connected to each other, and the connecting portions are slid in the horizontal direction by the tilting device. It is possible to skew or shift the suspended load held by the implement or the suspension implement.

Further, the present invention relates to the diameter of the sheave on the trolley side and the diameter of the sheave on the suspender side of the sheaves located at both ends of the hypotenuses of all triangles formed by the rope spanned between the trolley and the suspension. Since it is the same, there is no unbalance in the length of the rope even when the lifting tool or the suspended load held by the lifting tool is wound or lowered, and high swing prevention performance and weight reduction are achieved. be able to. Furthermore, the same effect can be obtained even when the diameter of the sheave on the trolley side is smaller than the diameter of the sheave on the suspension side.

FIG. 1 is a perspective view of a transfer crane. FIG. 2 is a perspective view showing a first embodiment of a rope hanging structure according to the present invention. FIG. 3 is a schematic diagram of a rope hanging structure from the direction of arrow A in FIG. FIG. 4 is a schematic diagram of a rope hanging structure from the direction of arrow B in FIG. K to N in FIG. 5 are triangular pattern diagrams. FIG. 6 is a side view of a double-headed cylinder type tilting device. FIG. 7 is a side view of a single-head cylinder type tilting device. FIG. 8 is a perspective view showing a second embodiment of the rope hanging structure according to the present invention.

Explanation of symbols

6 Trolley 8

Suspension

71, 72 and 75,76 Two sets of

ropes

74, 78 and 73,77 Two sets of ropes ah triangle x1 to x8 hypotenuse

Embodiments according to the present invention will be described below with reference to the drawings.

(1) Embodiment 1
First, a first embodiment of the present invention will be described. As shown in FIG. 1, the transfer crane 1 has a crane main body 2 formed in a gate shape, and a container storage zone in the direction of an arrow E with two front and rear rubber tires 4 provided on the legs 3. Drive towards.

The transfer crane 1 also includes a trolley 6 that traverses the girder 5 on the upper part of the crane body in the direction of the double-headed arrow F, and a plurality of wire ropes drawn from a drum (not shown) on the trolley 6. (Hereinafter, it is called a rope.) The hanger 8 is hung by 7. Reference numeral 9 denotes a container for sea transportation.

As shown in FIG. 2, the trolley 6 includes one drum 16 having eight (2 × 4 sets) ropes, a direction in which the shaft core is orthogonal to the shaft core of the drum 16, and the lifting tool 8. The first sheave group 10 provided at the center of both ends in the longitudinal direction, the shaft core is parallel to the shaft core of the first sheave group 10, the second sheave group 20 provided at the four corners of the trolley 6, and the shaft core is the drum 16. The third sheave group 30 provided parallel to the shaft core of the trolley 6 and on the side opposite to the drum of the trolley 6, and the fourth shaft provided at the four corners of the hoist 8 with the shaft core orthogonal to the sheave shaft core of the first sheave group 10. The sheave group 40 includes a fifth sheave group 50 whose axis is parallel to the axis of the drum 16 and is provided at the center of the trolley 6.

The drum 16 is provided at the end on the trolley side corresponding to the end of the hanger 8 in the longitudinal direction. Further, the drum 16 includes a first and second pair of

ropes

71 and 72 for supporting the lifting tool 8 from the drum 16 via the first and

second sheave groups

10 and 20, and the drum 16 to the third, A fifth and sixth set of

ropes

75 and 76 for supporting the lifting tool 8 via the first and

second sheave groups

30, 10 and 20, and the drum 16 to the fourth and

fifth sheave groups

40 and 50. And a fourth and eighth pair of

ropes

74 and 78 for supporting the suspension 8 via the third, fourth and

fifth sheave groups

30, 40 and 50, and from the drum 16 to the fourth and fourth. A third and a seventh set of

ropes

73 and 77 for supporting the suspension device 8 via the five

sheave groups

40 and 50 and the third, fourth and

fifth sheave groups

30, 40 and 50; I have.

More specifically, when viewed from the direction of the 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. Is connected to the left end of the cylinder of the tilting device 111, and a triangle a is formed between the hanger 8 and a trolley (not shown).

The second rope 72 is connected to the cylinder right end portion of the double-headed cylinder tilting device 111 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 the hanger 8 and the trolley.

The fifth rope 75 is a double-head cylinder type via the sheave 31 at the center 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. Is connected to the left end of the cylinder of the tilting device 112, and a triangle c is formed between the hanger 8 and the trolley.

The sixth rope 76 is a double-head cylinder type via 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. Is connected to the right end of the cylinder of the tilting device 112, and forms a triangle d between the hanger 8 and the trolley.

On the other hand, when viewed from the direction of arrow B, the fourth rope 74 is connected forward via the right end sheave 42 on the front end side of the fourth sheave group 40 and the right end sheave 52 on the front end side of the fifth sheave group 50. Connected to the front end of the rod 117, a triangle f is formed between the hanger 8 and the trolley.

The eighth rope 78 is connected to the connecting rod 117 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 left end sheave 51 on the front end side of the fifth sheave group 50. Connected to the rear end, a triangle e is formed between the hanger 8 and the trolley.

The third rope 73 is connected to the front end portion of the connecting rod 118 via the right end sheave 44 on the rear end side of the fourth sheave group 40 and the right end sheave 54 on the rear end side of the fifth sheave group 50. A triangle h is formed between 8 and the trolley.

The seventh rope 77 is connected to the rear through 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 left end sheave 53 on the rear end side of the fifth sheave group 50. Connected to the rear end of the connecting rod 118, a triangle g is formed between the hanger 8 and the trolley.

The connecting

rods

117 and 118 are slidably provided on the trolley 6 and are pushed and pulled in the longitudinal direction of the lifting tool 8 by the single-head cylinder

type tilting devices

115 and 116. Next, the triangles a to h will be described in detail.

As shown in FIG. 3, the triangle a is supported by the slant side x1 supported by the sheave 12 on the suspension side and the sheave 21 on the trolley side, the bottom side y1 supported by the sheave 21 on the trolley side, and the sheave 12 on the suspension side. The vertical side z1 is formed. p1 represents an apparent intersection of the base y1 and the vertical side z1.

The triangle b is formed by the oblique side x2 supported by the sheave 11 on the suspension side and the sheave 22 on the trolley side, the bottom side y2 supported by the sheave 21 on the trolley side, and the vertical side z2 supported by the sheave 12 on the suspension side. Is done. p2 represents an apparent intersection of the base y2 and the vertical side z2.

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

The triangle d is formed by the slant side x6 supported by the sheave 14 on the suspension side and the sheave 24 on the trolley side, the upper side y6 supported by the sheave 24 on the trolley side, and the vertical side z6 supported by the sheave 14 on the suspension side. Is done. p6 represents an apparent intersection of the base y6 and the vertical side z6.

Further, as shown in FIG. 4, the triangle e has an oblique side x8 supported by the sheave 41 on the suspension side and the sheave 51 on the trolley side, an upper side y8 supported by the sheave 51 on the trolley side, and a sheave 41 on the suspension side. It is formed by the vertical side z8 supported by. p8 represents an apparent intersection of the base y8 and the vertical side z8.

The triangle f is formed by the slant side x4 supported by the sheave 42 on the suspension side and the sheave 52 on the trolley side, the upper side y4 supported by the sheave 52 on the trolley side, and the vertical side z4 supported by the sheave 42 on the suspension side. Is done. p4 indicates an apparent intersection of the base y4 and the vertical side z4.

The triangle g is formed by the slant side x7 supported by the sheave 43 on the suspension side and the sheave 53 on the trolley side, the upper side y7 supported by the sheave 53 on the trolley side, and the vertical side z7 supported by the sheave 43 on the suspension side. Is done. p7 represents an apparent intersection of the base y7 and the vertical side z7.

The triangle h is formed by the slant side x3 supported by the sheave 44 on the suspension side and the sheave 54 on the trolley side, the upper side y3 supported by the sheave 54 on the trolley side, and the vertical side z3 supported by the sheave 44 on the suspension side. Is done. 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.
x1 = x2 = x3 = x4 = x5 = x6 = x7 = x8 (1)
y1 = y2 = y3 = y4 = y5 = y6 = y7 = y8 (2)
z1 = z2 = z3 = z4 = z5 = z6 = z7 = z8 (3)

5K is a diagram in which triangles a and c are patterned, FIG. 5L is a diagram in which triangles b and d are patterned, FIG. 5M is a diagram in which triangles e and g are patterned, and FIG. 5N is a pattern in which triangles f and h are patterned. FIG.

As described above, the present invention is formed by eight (2 × 4 sets) of ropes 71 to 78 included in four rope-wrapping virtual surfaces (not shown) assumed around the suspension 8. Since the eight triangles a to h constitute the truss structure, the swing restraining force for restraining the swing of the suspension 8 or a suspended load (not shown) held by the suspension 8 is extremely high. 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 hanger 8 or the suspended load held by the hanger 8 exhibits a higher suppression force that suppresses the shaking in the transverse direction.

When actively stopping the swinging of the suspended load 8 or the suspended load held by the suspended tool 8 in the transverse direction, the cylinder 120 (see FIG. 6) of the double-headed cylinder

type tilting devices

111 and 112 is used. Or, in synchronization with the swing of the suspended load held by the lifting tool 8, the lifting tool 8 or the suspended load held by the lifting tool 8 is pushed and pulled in the same direction.

On the other hand, when shifting the hanging load held by the hanger 8 or the hanger 8 in the transverse direction, the double head cylinder type is used in a direction opposite to the direction of shifting the hanger 8 or the hung load held by the hanger 8. The cylinders 120 of the

tilting devices

111 and 112 are pushed out. In addition, when shifting the lifting tool 8 or the suspended load held by the lifting tool 8 in the longitudinal direction, the single head cylinder type tilting toward the direction of shifting the hanging load 8 or the lifting load held by the lifting tool 8 is performed. The cylinders 122 (see FIG. 7) of the rolling

devices

115 and 116 are pushed out.

Furthermore, when skewing the lifting tool 8 or the suspended load held by the lifting tool 8 around a vertical axis (not shown), the cylinders 120 of the double-headed cylinder

type tilting devices

111 and 112 are pushed in opposite directions. The cylinders 122 of the single-head cylinder

type tilting devices

115 and 116 are also pushed out in opposite directions according to the cylinders 120 of the double-headed cylinder

type tilting devices

111 and 112.

At this time, the diameters of the sheaves 21 to 24 and 51 to 54 on the trolley side and the diameters of the sheaves 11 to 14 and 41 to 44 on the suspension side of the sheaves located at both ends of the hypotenuses x1 to x8 of all the triangles a to h Are preferably the same. Further, it is desirable that the diameters of the sheaves 21 to 24 and 51 to 54 on the trolley side are smaller than the diameters of the sheaves 11 to 14 and 41 to 44 on the suspension side.

The sheaves 21 to 24 and 51 to 54 on the trolley side are equalizer sheaves, and the sheaves 21 to 24 on the trolley side have almost no passage of the rope when the lifting tool 8 or the suspended load held by the hanging tool 8 is lifted or lowered. Even if the

diameters

51 and 54 are made smaller than the diameters of the sheaves 11 to 14 and 41 to 44 on the suspension side, the life of the rope is not adversely affected. In addition, the weight can be reduced.

As shown in FIG. 6, the double-headed cylinder

type tilting devices

111 and 112 are configured to slide the double-headed cylinder 120 back and forth by an electric motor 119. On the other hand, as shown in FIG. 7, the single-head cylinder

type tilting devices

115, 116 are configured to slide the single-head cylinder 122 back and forth by the electric motor 121.

As described above, it is possible to skew or shift the suspension 8 or the suspended load held by the suspension 8 with the force of the differential tension of the rope, so that the double-headed cylinder

type tilting devices

111 and 112 and the single-headed cylinder type The

tilt devices

115 and 116 can be downsized.

(2) Embodiment 2
Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The first difference is that, as shown in FIG. 8, single-head

cylinder tilting devices

115 and 116 are used instead of the double-headed

cylinder tilting devices

111 and 112. In this case, the arm 123 provided at the connecting portion of the first and

second ropes

71 and 72 is operated in the transverse direction of the lifting tool 8 by the single-head cylinder type tilting device 115, and similarly, the fifth and sixth ropes are operated. The arm 123 provided at the connecting portion of 75 and 76 is operated in the transverse direction of the lifting tool 8 by the single-head cylinder type tilting device 116.

The second difference is that a connecting rod 127 parallel to the transverse direction of the hanger 8 is provided on the trolley, and the opposite drum ends of the

ropes

74 and 78 are fixed to one bracket 124 provided at the end of the connecting rod 127. The other end of the

ropes

73 and 77 is fixed to the other bracket 125. In this case, when the connecting rod 127 is slid in the direction of the arrow, the

brackets

124 and 125 are lowered around the shaft 126.

The third difference is that a sixth sheave group 60 is provided on the trolley, a rope 74 is wound around one sheave 61, and a rope 73 is wound around the other sheave 62. The

sheaves

61 and 62 are provided in parallel or substantially parallel to the upper surface of the trolley.

Further, as shown in FIG. 8, the

sheaves

51 and 52 constituting the fifth sheave group 50 have the same axis, and the

sheaves

53 and 54 have the same axis, thereby simplifying the sheave arrangement. However, there is no problem even if it is separated in the longitudinal direction of the hanger 8 as in the first embodiment.

Note that the method of winding the rope is substantially the same as the method of winding the first to eighth ropes 71 to 78 in the first embodiment, and thus detailed description thereof is omitted. Further, the pattern diagrams of the triangles a to h are substantially the same as the pattern diagrams of the triangles a to h in the first embodiment, and thus the description thereof is omitted.

(3) Other Embodiments In the first and second embodiments of the present invention, the drum 16 is offset from one end of the trolley, but the drum 16 may be set at the center of the trolley. In this case, four sheaves whose supporting shafts are parallel to the axis of the drum 16 are added as the third sheave group 30 so as to face the sheaves 31 to 34 provided on the side opposite to the drum in FIG. To support the first ropes 71 to 74, respectively.

Claims

In a crane comprising a trolley having one drum and a plurality of sheaves, and a suspension having a plurality of sheaves, the suspension being suspended below the trolley by a rope drawn from the drum, the length of the suspension Rope wrapping virtual planes assumed at both ends of the direction, a pair of ropes pulled out from the drum, these ropes form a triangle between the suspension and the trolley, and the hypotenuses are separated from each other. In the virtual surface of the rope wrapped around both ends in the lateral direction of the hanging tool, the ropes of a set of two drawn from the drum are connected to the hanging tool and the trolley. Each triangle is formed between them, and the hypotenuses are spanned so that they face each other, and all three formed by the rope Rope hanging structure of the crane, characterized in that the shape congruent.
A drum provided at one end of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting tool in a direction in which the shaft core is orthogonal to the axis of the drum, and a shaft core is a sheave shaft core in the first sheave group Second sheave group parallel to the trolley and at the four corners of the trolley, the shaft core is parallel to the drum shaft core and the third sheave group provided on the non-drum side of the trolley, the shaft core is the first sheave group sheave shaft core And a fourth sheave group provided at the four corners of the lifting tool, and a fifth sheave group provided at the center of the trolley with the shaft core parallel to the drum core and the center of the trolley,
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. 5th and 6th set of ropes that suspend and support, 4th and 5th that suspend the suspension from the drum via the 4th and 5th sheave groups and the 3rd, 4th and 5th sheave groups. 8 sets of ropes, and third and seventh sets of ropes that suspend suspensions from the drum via the fourth, fifth sheave group and the third, fourth, and fifth sheave groups. The crane rope hanging structure according to claim 1, wherein each rope forms a triangle between the trolley and the suspension.
A drum provided at one end of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting device in a direction in which the shaft core is orthogonal to the axis of the drum, and a shaft core is a sheave shaft core of the first sheave group Second sheave group parallel to the trolley and at the four corners of the trolley, the shaft core is parallel to the drum shaft core, the third sheave group provided on the side opposite to the drum of the trolley, and the shaft core is the sheave of the first sheave group. A fourth sheave group orthogonal to the shaft core and provided at the four corners of the lifting device, a fifth sheave group provided with the shaft core parallel to the drum shaft core and at the center of the trolley, and the sheave surface parallel to or substantially over the top surface of the trolley A sixth sheave group that is parallel 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 a second suspending tool suspended from the drum via the fourth, fifth and sixth sheave groups and the third, fourth and fifth sheave groups. A fourth set of ropes and an eighth set of ropes, a third and a seventh set for hanging a suspension from the drum via a fourth, fifth and sixth sheave group and a third, fourth and fifth sheave group; The crane rope hanging structure according to claim 1, further comprising a pair of ropes, wherein each rope forms a triangle between the trolley and the hanging tool.
A drum provided in the center of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting tool in a direction in which the shaft core is orthogonal to the axis of the drum, and a shaft core is a sheave shaft core in the first sheave group A second sheave group that is parallel to the four corners of the trolley, a shaft core that is parallel to the drum shaft core and a third sheave group that is provided at both ends of the trolley, and a shaft core that is the sheave shaft core of the first sheave group. A fourth sheave group orthogonal to each other and provided at the four corners of the lifting device, and a fifth sheave group having an axial center parallel to the axial center of the drum and provided at the center of the trolley. The first and second sets of ropes and the fifth and sixth sets of ropes that support the suspension tool via the second sheave group, and the third, fourth, and fifth sheave groups from the drum. A fourth and eighth set of ropes and a third and seventh set of ropes for supporting the suspension tool via A-loop and rope hanging structure of the crane according to claim 1, wherein each rope and forming a triangle between the tool hanging the trolley.
A drum provided at the center of the trolley, a first sheave group provided in the center of both ends in the longitudinal direction of the lifting device in a direction in which the shaft core is orthogonal to the axis of the drum, and a shaft core is a sheave shaft core of the first sheave group Second sheave group parallel to the trolley and at the four corners of the trolley, shaft core parallel to the drum core and third sheave group provided at both ends of the trolley, shaft core of the first sheave group sheave axis 4th sheave group provided at the four corners of the lifting device and the shaft core is parallel to the drum core core, and the fifth sheave group provided at the center of the trolley, the sheave surface is parallel or substantially parallel to the top surface of the trolley. And a sixth sheave group attached to 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. The crane rope hanging structure according to claim 1, further comprising a pair of ropes, wherein each rope forms a triangle between the trolley and the hanger.
A pair of two rope ends are connected to each other, and the connecting portion is slid in the horizontal direction by a tilting device, so that the hanging load or a suspended load held by the hanging device can be skewed or shifted. The crane rope hanging structure according to any one of claims 1 to 5.
The sheaves located at both ends of the hypotenuses of all triangles formed by ropes stretched between the trolley and the suspension are the same in the diameter of the sheave on the trolley side and the diameter of the sheave on the suspension side The crane rope hanging structure according to any one of claims 1 to 5.
The sheaves located at both ends of the hypotenuses of all triangles formed by ropes spanned between the trolley and the suspension are characterized in that the diameter of the sheave on the trolley side is smaller than the diameter of the sheave on the suspension side The crane rope hanging structure according to any one of claims 1 to 5.
The crane rope hanging structure according to any one of claims 1 to 5, wherein the bases of all triangles formed by a rope suspended between the trolley and the suspension are positioned on the trolley side.