JP2010126289A - Rope hooking structure of crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope hooking structure of a crane, having a simple structure and high responsiveness and adaptable to high lift and high speed. <P>SOLUTION: A set of two ropes 71, 72 and a set of two ropes 75, 76 which are drawn from a drum 16 are installed between the longitudinal both ends of a sling 8 so that these ropes form triangles a-d between the sling 8 and a trolley and the diagonal sides thereof are separated from each other. A set of two ropes 74, 78 and a set of two ropes 73, 77 drawn from the drum 16 are installed between the lateral both ends of the sling 8 so that these ropes form triangles e-h between the sling 8 and the trolley and the diagonal sides thereof face each other. All the triangles a-h formed by the ropes 71-78 are congruent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  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).

  The wire-leaving structure described in Patent Document 1 is said to cause little container shake, but a suspension point is formed at the center in the longitudinal direction of the spreader (suspender) due to roping restrictions. For this reason, a structure called a head block is required, and the manufacturing cost increases due to an increase in weight.

  In Patent Document 2, similarly to Patent Document 1, a suspension point is formed at the center in the longitudinal direction of the spreader (suspender) due to restrictions on roping, 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 of the hanger in the longitudinal direction, and an additional displacement is provided at the end of the trolley corresponding to the end of the hanger in the lateral direction. Means (see FIG. 7) are 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 ropes in a set, the responsiveness is not necessarily high. Further, in Patent Document 3, the lower roller whose axis is directed in the longitudinal direction of the spreader (hanging tool) and the lower roller whose axis is directed in the lateral direction of the spreader are concentrated at the four corners of the spreader ( It is necessary to make the four corners of the spreader strong (weight increase).
Japanese Patent No. 3268224 Microfilm of actual application No. 47-91210 (No. 49-49667) Japanese National Patent Publication No. 10-507435

  An object of the present invention is to provide a rope hanging structure of a crane 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 invention according to claim 1 of the present application is a crane that includes a trolley that includes one drum and a plurality of sheaves, and a suspension that includes a plurality of sheaves, and that suspends the suspension using a rope drawn from the drum. In the rope wrapping virtual plane assumed at both ends in the longitudinal direction of the hanging tool, a pair of ropes drawn from the drum forms a triangle between the hanging tool and the trolley. The ropes are placed 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 to connect two ropes drawn out from the drum. Form a triangle between the hanger and the trolley, hang so that their hypotenuses face each other, and form the rope. And said that all of the triangle to the joint was.

The invention according to claim 2 of the present application is the drum according to claim 1, wherein the drum is provided at one end of the trolley, the shaft core is in a direction perpendicular to the axis of the drum and at the center of both ends in the longitudinal direction of the hanger. One sheave group, a second sheave group in which the shaft core is parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, the shaft core is parallel to the drum core and the second sheave group provided on the opposite side of the trolley A third sheave group, a fourth sheave group whose shaft core is orthogonal to the sheave shaft core of the first sheave group and provided at the four corners of the lifting device, and whose shaft core is parallel to the drum core and at the center of the trolley. With five sheave groups,
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. And each of the ropes forms a triangle between the trolley and the hanger.

The invention according to claim 3 of the present application is the drum according to claim 1, wherein the drum is provided at one end of the trolley, and the shaft core is provided in the direction perpendicular to the axis of the drum and at the center of both ends in the longitudinal direction of the hanger. One sheave group, the shaft core is parallel to the sheave shaft core of the first sheave group, and the second sheave group provided at the four corners of the trolley, the shaft core is parallel to the drum core, and provided on the side opposite to the drum of the trolley The third sheave group, the 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, the shaft core is parallel to the shaft core of the drum, and is provided at the center of the trolley A fifth sheave group, a sheave surface being parallel or substantially parallel to the top surface of the trolley and a sixth sheave group 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. And a pair of ropes, and each rope forms a triangle between the trolley and the hanger.

The invention according to claim 4 of the present application is the drum according to claim 1, wherein the drum provided in the central portion of the trolley, the shaft core in a direction perpendicular to the shaft core of the drum and the central portion of both ends in the longitudinal direction of the lifting device. A first sheave group, a second sheave group whose shaft core is parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, and a third sheave whose shaft core is parallel to the drum core and at both ends of the trolley A sheave group, a fourth sheave group whose shaft 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 whose shaft core is parallel to the drum core and at the center of the trolley With sheaves,
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. A fourth and eighth set of ropes and a third and seventh set of ropes for supporting the suspension device via the fourth and fifth sheave groups, each rope being a trolley It is characterized by forming a triangle between the hanging tools.

The invention according to claim 5 of the present application is the drum according to claim 1, wherein the drum provided in the central portion of the trolley, the shaft core in a direction perpendicular to the shaft core of the drum and in the center of both end portions in the longitudinal direction of the hanger. A first sheave group, a second sheave group whose shaft core is parallel to the sheave shaft core of the first sheave group and provided at the four corners of the trolley, and a third sheave whose shaft core is parallel to the drum core and at both ends of the trolley A sheave group, a fourth sheave group whose 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 whose shaft core is parallel to the drum core and at the center of the trolley A fifth sheave group, a sheave surface being 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. And a pair of ropes, and each rope forms a triangle between the trolley and the hanger.

  The invention according to claim 6 of the present application is that in any one of claims 1 to 5, by connecting two ends of a pair of ropes, and sliding the connecting portion in a horizontal direction by a tilting device, The hanging tool or a suspended load held by the hanging tool can be skewed or shifted.

  The invention according to claim 7 of the present application is the sheave according to any one of claims 1 to 5, which is located at both ends of the hypotenuses of all triangles formed by a rope spanned between the trolley and the hanging tool. The diameter of the trolley side and the diameter of the hanging tool side are the same, and the diameter of the sheave on the trolley side is smaller than or the same as the diameter of the sheave on the hanging tool side.

  The invention according to claim 8 of the present application is that, according to any one of claims 1 to 5, the bases of all the triangles formed by the rope spanned between the trolley and the suspension are positioned on the trolley side. Features.

  In the rope hanging structure of the crane according to the present invention, the rope winding virtual surface assumed at both ends in the longitudinal direction of the hanging tool is a set of two ropes drawn from the drum, and these ropes are between the hanging tool and the trolley. Are formed so that the hypotenuses are oriented in directions away from each other, and the rope wrapping virtual surfaces assumed at both ends in the lateral direction of the hanger have a set of two drawn from the drum. These ropes form a triangle between the hanging tool and the trolley, and are routed so that their hypotenuses face each other, and all the triangles formed by the rope are congruent. All the 8 ropes (2 x 4 sets) included in the virtual surface of the four ropes envisaged around the equipment have a truss structure, and are attached to the suspension or suspension. Been suspended swinging of the load can be suppressed.

  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, in the present invention, the diameters of the sheaves located at both ends of the hypotenuses of all triangles formed by the rope spanned between the trolley and the suspension are the same on the trolley side and the suspension side, and The diameter of the sheave on the trolley side is smaller than or equal to the diameter of the sheave on the suspender side, so that the length of the rope can be increased even if the suspended load or the suspended load held by the suspender is wound up or down. In addition, no imbalance occurs, and high steady rest performance and weight reduction can be achieved.

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

(A) 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 body 2 formed in a gate shape, and the container storage zone is set in the direction of a double arrow E by four 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 trolley side end corresponding to the longitudinal end of the hanger 8. 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 hanger 8 by single-head cylinder tilting devices 115 and 116.

  Here, 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 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)

  5A is a diagram in which triangles a and c are patterned, FIG. 5B is a diagram in which triangles b and d are patterned, FIG. 5C 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 the eight triangles a to h constitute the truss structure, the swing suppressing force that suppresses 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 the swinging of the suspended load held by the lifting tool 8 or the lifting tool 8 in the transverse direction is positively stopped, the cylinder 120 (see FIG. 6) of the double-headed cylinder type tilting devices 111 and 112 is attached to the lifting tool 8 or The hoisting tool 8 is pushed and pulled in the same direction as the swinging direction of the hoisting load held by the hoisting tool 8 or the hoisting tool 8 in synchronism with the swinging of the hoisting load held by the hoisting tool 8.

  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 about 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 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.

  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 lifting tool or the suspended load held by the lifting tool with the force of the differential tension of the rope, so that the double-headed cylinder tilting devices 111 and 112 and the single-headed cylinder tilting The devices 115 and 116 can be downsized.

(B) Embodiment 2
Next, a second embodiment of the present invention will be described. Since the following points are different from the first embodiment, the same reference numerals are assigned to the same components, and detailed description thereof is omitted.

  As shown in FIG. 8, the first difference is that instead of the double-headed cylinder type tilting devices 111 and 112, single-headed cylinder type tilting devices 115 and 116 are used. 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.

  A 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.

  In addition, 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 arrangement of the sheaves. 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. The triangular pattern diagram is also substantially the same as the triangle a to h pattern diagram in the first embodiment, and is therefore omitted.

(C) 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. The first ropes 71 are supported by the first ropes 71, respectively.

It is a perspective view of a transfer crane. 1 is a perspective view showing a first embodiment of a rope hanging structure according to the present invention. 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. It is a side view of a single-head cylinder type tilting device. It is a perspective view which shows 2nd Embodiment of the rope hanging structure which concerns on this invention.

Explanation of symbols

6 Trolley 8 Lifting tools 71, 72 and 75, 76 Two sets of ropes 74, 78 and 73, 77 Two sets of ropes a to h Triangles x1 to x8

Claims (8)

  A crane having a trolley having one drum and a plurality of sheaves, and a suspension device having a plurality of sheaves, and suspending the suspension device with a rope drawn from the drum, in both longitudinal ends of the suspension device In the rope-wrapping virtual plane assumed in the above, two ropes drawn out from the drum form a triangle between the hanger and the trolley, and the hypotenuses of the ropes face away from each other. In the virtual rope wrapping virtual plane assumed at both ends in the lateral direction of the hanging tool, a set of two ropes drawn from the drum, each of which is a triangle between the hanging tool and the trolley And so that the hypotenuses face each other, and all the triangles formed by the rope are congruent Rope hanging structure of the crane, characterized the door. 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, and the shaft core is the sheave shaft core of the first sheave group 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 suspension; a fifth sheave group provided with the shaft core parallel to the drum shaft core and the central portion 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 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. 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 that is orthogonal and provided at the four corners of the lifting device, and a fifth sheave group that has an axial center parallel to the axial center of the drum and provided in the center of the trolley,
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. A fourth and eighth set of ropes and a third and seventh set of ropes for supporting the suspension device via the fourth and fifth sheave groups, each rope being a trolley 2. The rope hanging structure for a crane according to claim 1, wherein a triangle is formed between the suspension tools. 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 spanned between the trolley and the lifting device have the same diameter on the trolley side and the diameter of the lifting device side, and the sheaves on the trolley side The crane rope hanging structure according to any one of claims 1 to 5, wherein the diameter is smaller than or equal to the diameter of the sheave on the suspension side.   The crane rope hanging structure according to any one of claims 1 to 5, wherein the bases of all the triangles formed by the rope suspended between the trolley and the suspension are located on the trolley side.

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