WO1997005052A1

WO1997005052A1 - Suspender swinging method and apparatus therefor

Info

Publication number: WO1997005052A1
Application number: PCT/JP1995/001506
Authority: WO
Inventors: Mituo Hirata; Yoshiaki Miyanaga
Original assignee: Hitachi, Ltd.
Priority date: 1995-07-28
Filing date: 1995-07-28
Publication date: 1997-02-13

Abstract

This invention aims at obtaining a large swing angle by a comparatively small apparatus. In an unloader having a grab bucket (55), four sheaves in a trolley (53) for suspending the grab bucket (55) are provided movably on a 45° inclined surface. The four sheaves are divided into two groups. Each group comprises lift sheaves and opening and closing sheaves. One group is positoned at a lower end portion of the inclined surface, and the other group at an upper end portion thereof. The wires extending from the two groups of sheaves and connected to a suspension point is inclined at 45° with respect to the axes of the sheaves. The sheaves for opening and closing the grab bucket are inclined at 45° with respect to the axes of the sheaves of the trolley. One group of sheaves in the trolley (53) are moved upward, while the other group of sheaves therein are moved downward. Consequently, the grab bucket (55) is swung through substantially 90°.

Description

Specification

Method and apparatus for swinging suspension

Technical field

The present invention relates to a device for turning a crane hanging device, and in particular, to a device requiring a large turning angle, for example, a device suitable for turning a grab packet for handling bulk materials.

Background art

A crane equipped with a grab bucket, for example, an unloader, is used for unloading bulk materials such as ore from ships. Usually, the opening / closing direction of the grab packet is a direction perpendicular to the traveling direction of the trolley in which the grab packet is suspended. As the unloading progresses and the amount of loose objects from the ship decreases, it is desirable that the opening and closing direction of the grab packet be set to the traveling direction of the trolley. In other words, it is necessary to turn the grab packet 90 degrees. This is to improve cargo handling efficiency.

For this purpose, a revolving unit is generally installed on a trolley for hanging grab packets, and a winch is installed on the revolving unit. Alternatively, a revolving structure is installed between the rope suspended from the trolley and the grab packet.

In addition, for hanging devices other than grab packets, for example, beam-shaped hanging devices and container hanging devices, the turning of the hanging devices is required to adjust the position of the lifting position. Japanese Patent Laying-Open No. 62-111129 discloses a tilting device provided at an end of a girder on which a trolley travels. The tilting device moves the end of the rope to tilt the hanger (turning or tilting). In addition, there are some that move the sheave installed on the trolley to tilt it. However, any of them cannot obtain a large turning angle. Disclosure of the invention

A swivel device for swiveling a hanging tool such as a grab bucket requires a circular revolving unit, and the device becomes large, the configuration becomes complicated, and the weight increases.

In addition, the swing angle is not large in the case of swinging the hanger by operating the rope. For this reason, the use is limited and the usability is poor.

An object of the present invention is to enable a large turning angle to be obtained with a relatively small device.

According to the present invention, two sheaves supporting at least two ropes for suspending a hanging device are moved in a direction close to or away from each other in a horizontal direction perpendicular to the axis of the sheave. , Is characterized.

According to this configuration, since the hanging device is swung by moving at least two sheaves for hanging the hanging device so as to approach or separate from each other, a large turning angle can be obtained with a relatively small device. Can be done. In particular, if the two sheaves are moved closer to and away from each other so that the line connecting the two sheaves intersects before and after the movement, a larger rotation can be achieved.

In the case where the end of the rope is fixed to a hanging device, if the movement of the two sheaves is moved in a direction of 45 degrees with respect to the horizon, the amount of the rope to be inserted into each of the sheaves is adjusted. And the amount of feeding can be made the same, so that the inclination of the hanging device can be prevented.

Further, if the axis of the sheave of the hanger is inclined with respect to the axes of the two sheaves, the rope can be prevented from coming off when the hanger rotates. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view of an unloader according to an embodiment of the present invention.

FIG. 2 is a front view of the unloader when the opening and closing direction of the grab packet is rotated 90 degrees with respect to FIG.

FIG. 3 is a plan view showing the relationship between the unloader and the ship. FIG. 4 is an arrangement diagram of ropes for traveling the trolley of FIG.

FIG. 5 is an arrangement diagram of α-loops for operating the grab bucket of FIG.

FIG. 6 is a layout diagram of the operation ropes when the opening and closing direction of the grab bucket is rotated by approximately 90 degrees with respect to FIG.

FIG. 7 is a front view of the trolley of FIG.

FIG. 8 is a plan view of FIG.

FIG. 9 is a right side view of FIG.

FIG. 10 is a front view of the grab bucket of FIG.

FIG. 11 is a right side view of FIG.

FIG. 12 is a layout view of the glove packet opening / closing rope of FIG.

FIG. 13 is an arrangement diagram of the sheaves of the trolley and the grab bucket of FIG. Fig. 14 is a layout diagram of the trolley and the grab packet when the opening / closing direction of the grab bucket is rotated by about 90 degrees with respect to Fig. 13; Fig. 13 (A) It is a figure corresponding to (Β).

Fig. 15 shows the arrangement of sheaves between the trolley and the grab bucket when the opening and closing direction of the grab bucket is rotated by approximately 90 degrees with respect to Fig. 13; (C) in Fig. 13 It is a figure corresponding to D).

FIG. 16 is a cross-sectional view taken along the line 16—16 of FIG. 15, in which two cross sections are combined into one.

FIG. 17 is an enlarged view of a portion indicated by arrow 17 in FIG.

FIG. 18 is a plan view of a connection point between the electric cylinder and the sheave in FIG. FIG. 19 is a plan view of a main part of another embodiment of the present invention, and is a view corresponding to (Α) in FIG.

FIG. 20 is a side view of a main part of another embodiment of the present invention.

FIG. 21 is a plan view of FIG.

FIG. 22 is a side view of a main part of another embodiment of the present invention.

FIG. 23 is a plan view of FIG.

FIG. 24 is a side view of a main part of another embodiment of the present invention.

FIG. 25 is a plan view of FIG. FIG. 26 is a plan view of a main part of another embodiment of the present invention.

FIG. 27 is a side view of another embodiment of the present invention.

FIG. 28 is a plan view of FIG.

FIG. 29 is a plan view of the hanging device of FIG.

FIG. 30 is a plan view of a trolley according to another embodiment of the present invention.

FIG. 31 is a plan view of the hanging device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

A case where the present invention is applied to a grab bucket turning device will be described with reference to FIGS.

In FIG. 1, a crane, which is an unloader, runs a girder 51 supported by four legs 50, a hopper 52 for receiving loose objects, a trolley 53 and a catching trolley 54, and grab packets. A winch storage room 5 7 for operating the 5 5. The storage room 57 has a winch 60 for running the trolley 53, a winch 61 for raising and lowering the grab packet 55, and a winch 62 for opening and closing the grab packet 55.

In FIG. 4, two mouthpieces 65 a pulled out from the running winch 60 to one side are connected to the seaside end of the trolley 53 via sheaves 66 at the seaside end of the girder 51. The equalizer is connected to 6-7. The two ropes 65b pulled out from the winch 60 to the other side pass through the sheave 68 at the land side end of the girder 51 and the sheave 69 installed on the auxiliary trolley 54 in this order. Girder 51 is connected to the land side end.

In FIGS. 5 and 6, the two mouths 7 la and 7 1 b drawn out from the lifting winch 61 are sheaves 7 2 installed on the upper mast 58 in the middle of the girder 51. , The sheaves 73 installed on the catching trolley 54 and the sheaves 74 a, 74 b installed on the trolley 53, in that order, the joining points 75 a, 75 b of the grab packet 55. Is bound to. The two ropes 81a and 81b pulled out from the opening and closing winch 62 are attached to the sheave 82 and the catching trolley 54 installed on the upper mast 58 in the middle of the girder 51. Sheave 8 3 installed, Sheave 8 installed on trolley 53 It is connected to the sieve of the grab bucket 55 via 4a and 84b in sequence. The opening and closing ropes 8 la and 8 1 b are on the 內 side of the σ-loop 71 a and 7 lb for lifting. Grab packet 55 is lifted and lowered mainly by ropes 8 1 a and 9 lb.

The trolley 53 travels by driving the traveling winch 60. Auxiliary trolley 5

4 travels in the traveling direction of the trolley 53 at half the traveling speed of the trolley 53. The lifting and lowering of the grab bucket 55 is performed by operating a lifting winch 61 and an opening / closing winch 62. The opening and closing of the grab bucket 55 is performed by operating the opening and closing nip 62.

1 to 3 show the relationship between the opening / closing direction of the grab packet 55 and the ship 40. The trolley 53 with the grab bucket 55 suspended thereon travels along the gadder 51 between the hatch 41 of the ship 40 and the hopper 52 on the land side. Lower the grab packet 55 from the hatch 41, grasp the loose objects, raise the grab bucket 55, move it to the hopper 52, open the grab packet 55, and drop the load.

The hatch 41 of the ship 40 is long in the longitudinal direction of the ship. The longitudinal direction of the hatch 41 is orthogonal to the longitudinal direction of the guide 51. For this reason, grab packets are usually

The opening and closing direction of 55 is orthogonal to the longitudinal direction of the hatch 41, that is, the gutter 51. This is because the grab packet 55 is long in the opening and closing direction. Usually, unloading work is performed in this state.

When the bulk of the ship 40 is low, the grab bucket is released as shown at 55B.

Use in a state where it is turned 90 degrees. That is, the opening / closing direction of the grab packet 55B is set to a direction orthogonal to the longitudinal direction of the hatch 41. For this reason, a bulk object near the side wall 42 of the ship 40 can be grasped.

When the load is further reduced, bulldozers and workers are put on board, bulk materials are collected in the center, and unloading by the grab bucket 55 is facilitated.

In this way, the grab bucket is turned 90 degrees to grab the load on the side wall 42 of the ship 40, so that the loading of bulldozers and workers can be slowed down, and the unloading is efficient. What can be done. Hereinafter, the turning device of the grab bucket will be described in detail.

The configuration of the trolley 53 will be described with reference to FIG. The sheaves 74a and 84a of the trolley 53 are combined into one block 86. Sheaves 7 4 b and 8 4 b are also combined into one block 87. The block 86 and the book 87 are separated in the traveling direction of the trolley 53. The blocks 86 and 87 are placed on the lower slope 88 of the trolley 53. Block 86 is located at the upper end of the slope 88, and block 87 is located at the lower end of the slope. The Boococks 86 and 87 can move on the slopes 88 by the electric cylinder devices 90 and 91. If one of blocks 86, 87 rises, the other falls. With this movement, the grab packet 55 turns approximately 90 degrees. The angle of the slope 8 8 is 45 degrees with respect to the horizontal plane.

The configuration of the grab packet 55 will be described with reference to FIG. 10 to FIG. The lifting ropes 71a and 71b via the sheaves 74a and 7.4b of the trolley 53 are fixed to the fixed points 75a and 75b at the upper end of the grab bucket 55. I have.

The upper part of the grab bucket 55 has two sheaves 110 and 111. Both are at the same height. Both are on the same axis. Below the sheaves 110, 111, four sheaves 112, 113, 114, 115 are installed at the same height. The four lobes are on the same axis.

The opening / closing rope 81a via the sheave 84a of the trolley 53 is fixed to the sheave 113 via sheaves 112, 110, 113 in this order. Opening and closing ropes 8 1 b via sheaves 8 4 b of the trolley 53 are fixed to the sheaves 115 via sheaves 114, 111, 115 sequentially.

The rotating shafts of sheaves 110 and 111, and the rotating shafts of sheaves 112, 113, 114 and 115 are inclined with respect to the opening / closing direction of grab bucket 55. . This angle of inclination is 45 degrees.

The position of sheaves 7 4 a, 7 4 b, 84 a, and 84 b of α α 5 3 and the sheaves 11 0, 1 1 1, 1 1 2, 1 1 3 of the grab bucket 55 , 1 14, and 1 15 will be explained with reference to Fig.13. (A), (B), and (C) in Fig. 13 are top views. (A) shows the positions of the sheaves 74a, 74b, 84a, and 84b of the trolley 53. (B) shows the sheaves 110, 111 of the grab bucket 55. Indicates the position of. (C) shows the positions of sibs 112, 113, 114, 115 of grab packet 55. Po indicates the origin of (A) (B) (C). (B) · (C) are based on (A). (D) shows a view of the grab packet 55 viewed from the opening and closing directions. The position of (D) with respect to (C) indicates the opening and closing direction.

In (A), the sheaves 84a and 94b of the opening and closing ropes 8la and 8lb are inside the lifting ropes 71a and 7lb. In (A), there are ゥ inches 61, 62 on the right side, and the ropes 71a, 81a, 71b, 8 on the left side of the sheaves 74a, 84a, 74b, 84b. 1 b is the hanging position. The connecting line K connecting the position P 1 a, P 1 b where the opening / closing ropes 8 4 a, 84 b descend from the sheaves 84 a, 84 b is the turning center P. Pass through. The connecting line K is connected to the shafts 74a, 84a, 74b, 84b with respect to the axis (the traveling direction of the trolley 53 and the direction of the winches 61, 62). Degrees. When the diameter of the sheaves 74a, 84a, 74b, 84b is L, the distance between the sheave 84a and the sheave 84b is L. The center P 0 is located between the sheave 84a and the sheave 84b. Sheave

The interval between 74a and 84a (the interval between sheaves 74b and 84b) is "a", respectively.

In (C), there are sheaves 115, 114, 112, 113 from one end of the shaft. The axes of the shafts 112, 113, 114, 115 are located at the center P0. The axes of the sheaves 112, 113, 114, 115 are orthogonal to the connection line K. The center P 0 is located between the sheaves 112 and 114. Sheaves 1 13 and 1 14 are located on the side of sheaves 1 1 and 2. There are rope fixing points 75a and 75b just below the position where the lifting ropes 71a and 71b are suspended from the sheaves 74a and 74b of the trolley 53. Therefore, the distance between the fixed points 75a and 75b in the direction of the center line (the running direction of the trolley 53) is L.

Immediately below Pla and Plb of the sheaves 84a and 84b of the trolley 53, there are outer diameter portions of the sheaves 111 and 114. That is, ropes from sheaves 84a, 84b

The ropes 8 la, 8 1 a, 8 1 b There are positions P 2 a and P 2 b where 8 lbs are applied to sheaves 1 1 and 2. In (C), the right side of the sieve 1 12 is the position P 2a where the rope 81 a is hung. Sieve 1 1 4 is adjacent to sieve 1 1 2. In (C), the left side of the sieve 114 is the position P2b where the rope 81b is hung. That is, the distance from P 2 a to P 2 b in the direction of the center line P j and the distance from P 2 a to P 2 b in the direction of the center line P ₂ orthogonal to the center line P i are L, respectively. is there. The diameters of the sieves 1 1 2 and 1 1 4 are set so as to satisfy this relationship. Since sheaves 1 13 and 1 15 are for fixing, they do not need to have the same diameter as sheaves 1 12 and 1 14. Further, sheaves 1 13 and 1 15 are not required.

Outside diameter of sheave 1 1 2 and 1 1 4 from fixed points 75 a and 75 b? The distance to 2 &, P 2 b (the distance along the center line P ₂ ) is "a".

In (B), the axes of sheaves 110 and 111 are center P. It is located in. The axes of the sheaves 110 and 111 are orthogonal to the connection line K. The center P 0 is located between the sheave 1 110 and the sheave 1 1 1. Sheave 1 110 is above sheaves 1 1 2 and 1 1 3. Sheave 1 1 1 is above sheaves 1 114 and 1 15.

Now, as shown in FIGS. 8 and 13, sheaves 74a and 84a (block 86) are at the top, and sieves 74b and 84a (block 87) are at the bottom. And Opening and closing direction of the grab bucket bets 5 5 at this time is Hatsuchi 4 1 in the longitudinal direction (direction orthogonal to the running direction of the Toro Li 3, the direction of the center line P _2). To change the rotation direction of the grab packet 55 from this state to the traveling direction of the trolley 53 (the direction of the center line Pi), operate the electric cylinders 90 and 91 to move the sheave 7 4a. , 84a (block 86) at the bottom and sieves 74b, 84a (block 87) at the top. The amount of movement is L at horizontal distance.

As a result, the horizontal distance from the winches 61 and 62 to the blocks 86 and 87 changes, but the blocks 86 and 87 move on a 45-degree slope. The amount going to blocks 86, 87 and the amount of rope leaving the blocks 86, 87 are the same. For this reason, the length of the rope suspended from the blocks 86 and 87 does not change. For example, the height of the fixed points 75a and 75b does not change. No. Therefore, the grab packet 55 does not tilt or open

The fact that the moving surface of blocks 86 and 87 is a 45-degree slope will be described. As a comparative example, blocks 86 and 87 move on a horizontal plane. The fixed points 75a and 75b have a distance L in the moving direction of the blocks 86 and 87. For this reason, when blocks 86 and 87 are moved horizontally so that they are close to each other, the distance from block 86 to fixed point 75a is reduced, and the distance from block 87 to fixed point 75b is reduced. Becomes longer. Therefore, the grab packet 55 is inclined.

However, in the embodiment of the present invention, this is not the case because the moving surfaces of the blocks 86 and 87 are inclined at 45 degrees. In other words, the moving surface is inclined by 45 degrees because the ends of the ropes 71a, 71b, 81a, and 8lb are fixed to the grab bucket 55.

When the sheaves 74a and 84a are moved to the left by a distance L, and the sheaves 74b and 84b are moved to the right by a distance L, the ropes 71a, 81a, Since the suspension point of 7 1 b, 8 1 b is going to be directly below this sieve 74 a, 84 a, 74 b, 84 b, the connecting line K is connected to the sheave 74 a, 84 a, 74 b, and 84 b are almost orthogonal to the connecting line K before moving. Thus, grab bucket 55 will rotate by almost 90 degrees. This state is shown in FIGS. 14 and 15. (A) (Β) (C) (D) in Fig. 14 and Fig. 15

(A) (Β) (C) (D). As shown in Fig. 15 (D), it can be seen that the opening and closing direction of the grab bucket has turned by approximately 90 degrees.

However, the positions of the fixed points 75a and 75b are determined by the positions of the sheaves 74a and 74b. As shown in FIGS. 14 and 15, since the positions of the sheaves 74a and 74b have moved only a distance L, the fixed points 75a and 75b cannot rotate to 90 degrees. Have difficulty. As shown in Fig. 13 (C), the fixed point 75a needs to move to the position of 75a "in order to rotate 90 degrees, but this is not possible. 75a 'in (C) indicates the position of 75a in (C) in Fig. 15. Fixed points 75a, 75b, and sheaves 1 1, 1 1, 1 1 3, 1 1 4, and 1 1 5th place The position (rotation angle) is determined by the rotation force of the ropes 71a, 74b, 81a, 81b. Figures 14 (C) and 15 (B) are based on imagination. For this reason, the grab packet 55 rotates only up to 90 degrees. The line K connecting the rope suspension points P ia, b is 4 with respect to the center line P ₂

5 degrees. For this reason, as can be seen by drawing, it is possible to obtain an effect that the moving amount of the blocks 86 and 87 can be reduced as compared with other angles.

Moreover, the grab bucket bets 5 sheave 1 1 2 5 1 1 4, 1 1 0, 1 1 1 is 4 5 times with respect to its neutral alignment P _2. For this reason, the possibility that the ropes 81a and 81b deviate from the sheaves 112, 114, 110, and 111 when the grab packet 55 rotates is reduced.

Next, a device for moving the sheaves 74a, 84a, 74b, and 84b will be described in detail with reference to FIGS. 7 to 9 and FIGS. 16 to 18. FIG. Three members 91, 91, 91 are suspended from one end of a traveling body 90 traveling on the gadder 51. Two members 92, 92, 92 are suspended from the other end of the traveling body 90. Horizontal members 93, 94 connecting the three members 92 are above and below. The three members 91 and the horizontal member 94 at the lower end are connected by three inclined members 95. The inclination angle of the upper surface of the member 95 is 45 degrees. The horizontal member 93 and the traveling body 90 are connected by three inclined members 96. The inclination angle of the lower surface of the member 95 is 45 degrees. An installation base 97 of the electric cylinder devices 90, 90 protrudes from the three members 95. 9 and 8 are scaffolds for inspection.

On the upper surface of the member 95, four C-shaped (channel-shaped) guide rails 100 are provided. Two guide rails 100 are provided on the central member 95. On the lower surface of the member 96, four C-shaped (channel-shaped) guide rails 101 are provided. Two guide rails 106 are installed on the center member 96. The recess of the guide rail 100 and the recess of the guide rail 101 face each other. Guide rails 100 and 101 are fixed to members 95 and 96 with bolts 102. Guide rails 100 and 101 are the movement paths (slope) of blocks 86 and 87 8 Make up 8.

The shaft 103 for rotatably supporting the sheaves 74a, 84a is fixed to the support seat 104. A C-shaped (channel-shaped) sliding seat 105 is fixed to the upper and lower surfaces of the support seat 104 with a countersunk screw 106. The support structure of the sheaves 74b, 84b is the same as the support structure of the sheaves 74a, 84a.

The rod 90a of the electric cylinder device 90 and the support seats 104 and 104 are connected by a U-shaped joint 107. Each connection point is rotatably connected by a horizontal pin. The electric cylinder 90 is provided in each of the blocks 86 and 87. Along the side surface of the girder 51, three power supply lines 121 and three signal lines 122 used for the electric cylinder units 90, 90 are arranged. The trolley 53 has current collectors 123 and 124 in contact with the wires 122 and 122, respectively. The electric cylinders 90 and 90 operate according to the signals from the cab to the lines 122 and 122. When the blocks 86 and 87 reach the upper and lower ends, they are detected by a detector (not shown), and the operation of the electric cylinder 90 is stopped.

In the above embodiment, the grab packet rotates only about 90 degrees. If the amount of horizontal movement of the sieves 74a, 74b, 84a, 84b is larger than L, there is a possibility of 90-degree rotation.

Even if the line connecting the suspension points of the ropes 71a and 7lb from the lifting sheaves 74a and 74b is 45 degrees to the axis of the sheaves 74a and 74b. good. It is possible to obtain substantially the same turning angle as in the above embodiment. However, it is considered that a larger turning angle can be obtained in the above embodiment than in this embodiment. It is considered that the diameter of the sheaves 110, 111, 112, and 114 may be smaller than "1.41 XL".

As shown in Fig. 19, the axes of sheaves 74a and 84b and the axes of sheaves 74b and 84b are eccentric axes 103a and 103b, respectively. The sheaves 74a, 74b supporting the lifting ropes are connected to the sheaves 84a, 84b for opening and closing, and the sheaves 74a, 74b, 84a, 8 It is eccentric in the direction of movement 4b. According to this, it is possible to rotate to a larger angle.

A trolley with sheaves 74a, 74b, 84a, 84b does not need to be driven There is no. For this reason, for example, in a crane provided with a boom that rotates vertically, the sheaves 74a, 7b, 84a, 84b may be installed at the tip of the boom. .

Although the above embodiment has described a grab bucket, the present invention can also be applied to a grab for gripping wood.

The turning angle may be set according to the application.

The electric cylinder device 90 can be a hydraulic cylinder device or the like.

Another embodiment of FIGS. 20 and 21 will be described. Block 86 is supported on a ramp as in the previous embodiment. The chains 13 3 and 13 3 are endlessly hung on the sprockets 13 1, 13 1, 13 2 and 13 2 installed at the upper and lower ends. The lower sprocket 13 2 is a motor 13 4 Rotate by. The chain 133 is connected to the support 104 of the block 86. The illustration of the ramp and the like is omitted. The driving means of the block 87 is the same as that of the block 86. However, the rotation direction of the electric motors 13 4 is opposite between the blocks 86 and 87. The electric motor 13 4 and the sprocket 13 2 may be connected by a third chain.

The embodiment of FIGS. 22 and 23 differs from the embodiment of FIGS. 20 and 21 in that the chain 13 3 is disposed endlessly between blocks 86 and 87. The support seat 104 of the blocks 86, 87 is connected to the chain 133.

The embodiments of FIGS. 24 and 25 are different from the embodiments of FIGS. 20 and 21 in that the electric motors 13 4 and 13 4 are replaced with electric cylinder devices 13 6 and 13 36, respectively. . The rods of the electric cylinder devices 1366 and 1336 are connected to the support seats 104 of the blocks 86 and 87.

The embodiment of FIG. 26 differs from the embodiment of FIG. 23 in that the blocks 86 and 87 are moved by racks 13 and 13 and pinions 13 and 9 instead of chains. It is. The racks 13 7, 13 8 are connected to the support seat 104, and the embodiment of FIGS. 27, 28 and 29 will be described. In this embodiment, the sheaves 152 of the beam-shaped hanging tool 151 are suspended from the sheaves 144, 142 of the trolley 144. The sieves 1 4 2 and 1 4 3 move the horizontal moving path with the electric cylinder 1 Move by 4 4 and 1 4 5. The sheave 152 is inclined at 45 degrees with respect to the longitudinal direction of the hanging member 151. The lifting winch (not shown) rope 1 148 is connected to the winch via sieves 14 2, 15 2, 14 3 in sequence. <14 9 connects the trolley 14 1. Rope to run.

When the sheaves 142 are moved from one end of the movement path to the other end, and the sheaves 144 are moved from the other end of the movement path to one end by the electric cylinders 144, 145, the hanger 15 15 Rotates 90 degrees. When the sheaves 1 4 2 and 1 4 3 move, the rope: 1 4 8 moves with respect to the sheave 1 5 2, so that even if the sheaves 1 4 2 and 1 4 3 1 does not tilt.

The embodiment of FIGS. 30 and 31 differs from the embodiment of FIGS. 27 to 29 in that the shaft of the sheave 1555 of the hanging device 15 1 is provided perpendicular to the longitudinal direction of the hanging device 15 1. It is something. Others are the same as the embodiment of FIGS. 27 to 29. Under normal conditions, the two sheaves of the trolley 14 1 are positioned in parallel, that is, the axis of the sheave 14 3 is located on an extension of the axis of the sheave 14 2. In other words, the sieves 142 and 144 are arranged in parallel. The line connecting the suspension points of the ropes of the two sheaves 14 2 and 14 3 is S. Rotated from this state, the sheave 1 4 2 to one end side, by moving the sheaves 1 4 3 at the other end, the connecting line if S _2, for example, hanger 1 5 1 4 5 ° I do. The sheave 1 4 2 to the other end side, by moving the sheet one Bed 1 4 3 at one end side rotates, if the connecting line and S _3, for example, the sling 1 5 1 Ma Inasu 4 5 ° I do. Since the swing angle of the lifting device with respect to the sheaves 142 and 144 is small, it is not necessary to tilt the sheaves 155. The swivel angle of the hanger 15 1 can be freely obtained by the amount of movement of the sheaves 14 2 and 14 3. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, since a hanger is swiveled by moving at least two sheep for hanging a hanger near or away from each other, a large swivel angle can be obtained with a relatively small device. Things.

In particular, if the two sheaves are moved closer to and away from each other so that the line connecting the two sheaves intersects before and after the movement, the larger Can rotate.

Further, if the axis of the sheave of the hanging tool is inclined with respect to the axis of the two sheaves, the rope can be prevented from coming off when the hanging tool rotates.

Claims

The scope of the claims

1. Move the two sieves that support at least two ropes that suspend the hanger, in a direction perpendicular to the axis of the sieve, in a direction parallel to or away from each other. A method of turning a hanging tool, characterized in that:

2. The method according to claim 1, wherein the two sheaves are moved closer to and away from each other so that a line connecting the two sheaves intersects before and after the movement. Turning method of the hanging tool _c , characterized in that:

3. The method of turning a hanging tool according to claim 1, wherein the rope hung on the two chips is fixed to the hanging tool, and the movement of the two sheaves is controlled with respect to the horizon. 5 degrees to move in the direction, the method of turning hanger, wherein _c

4. The method of turning a hoist according to claim 1, wherein the two sheaves are moved in a direction in which the two sheaves are separated from a state where the axes of the two sheaves are aligned with each other. A unique method of turning the hanging tool.

5. At least two ropes for suspending the lifting device, two sheaves for supporting the two ropes, and the two sheaves facing in the horizontal direction perpendicular to the axis of the sheave. Means for moving in a direction approaching or moving away from each other;

6. The swinging device according to claim 5, wherein the moving unit moves the two sheaves close to each other so that a line connecting the two sheaves intersects before and after the movement. And a swiveling device for a lifting device.

7. The swinging device according to claim 5, wherein the ropes hung on the two sheaves are fixed to the hanger, and the two sheaves are at 45 degrees with respect to the horizon. Being installed on an inclined surface, wherein the moving means is for moving the two sheaves along the inclined surface, 6. The swinging device for a hoist according to claim 5, wherein the moving means has a line connecting a hanging point of a rope from the two sheaves, and a line connecting the hanging point of the two sheaves with respect to an axis of the two sheaves. A swinging device for a hanging device, wherein the hanging device is stopped so as to have an angle of 5 degrees.

9. The swinging device for a hoist according to claim 5, wherein the axis of the sheave of the hoist hung on the rope hung from the two sheaves is 4 to the axis of the two sheaves. Having an angle of 5 degrees;

10. The swing device of the hanging device according to claim 5, wherein the two sheaves are horizontally movable, and a middle portion of a rope suspended from the two sheaves is hung on the sheave of the hanging device. A swinging device for a hanging tool.

11. The hoisting device turning device according to claim 10, wherein the axis of the sheave of the hanging device is inclined at 45 degrees with respect to the axis of the two sheaves. Swinging device for hanging equipment.

12. The swinging device of the hoisting device according to claim 10, wherein the axis of the sheave of the hanging device is parallel to the axis of the two sheaves. .

13. The swinging device for a hoist according to claim 10, wherein a state in which the axes of the two sheaves are coincident with each other is such that one of the sheaves moves toward one end in the direction of the movement, and the other one moves. A state in which the sheave is on the other end side in the moving direction; a state in which the one sheave is on the other end side in the moving direction; and a state in which the other sheave is on one end side in the moving direction. A swinging device for a hanging tool, characterized in that the moving means can be stopped in three states.

14.2 A first block consisting of two sheaves supporting two ropes, a second block consisting of two sheaves supporting two ropes, the first block and the second block. Means for moving the blocks closer to or away from each other on a 45-degree slope;

Two fixing points for fixing two ropes passing through the sheave, two first sheaves for hanging opening / closing ropes passing through the sheave, and the first sheave; A second sheave installed above the first sheave, and a second sheave installed above the first sheave.

The two fixed points, the first sheave, and the second sheave are installed on a glove;

A line connecting the two fixed points is set at 45 degrees to the opening and closing direction of the grab,

The axis of the first sheave and the second sheave is set at 45 degrees with respect to the opening and closing direction of the grab;

A grab turning device characterized by the following.

15.5. A first block consisting of two sheaves supporting two ropes, a second block consisting of two sheaves supporting two ropes, the first block and the second block. Means for moving the blocks in a direction of approaching or moving away from each other on an inclined surface of 45 degrees, and

16.2. Two fixing points for fixing two ropes, two first ropes for opening and closing, two first sheaves, and a rope passing through the first sheave. And a second sheave installed above the first sheave; and

The line connecting the two fixed points is set at 45 degrees to the opening and closing direction of the grab,

The axis of the first sheave and the second sheave are set at 45 degrees with respect to the opening and closing direction of the grab;

A grab characterized by:

17. A first sheave that supports the rope, a second sheave that supports the rope, and a direction in which the first and second sheaves approach or move away from each other on a 45-degree inclined surface. And a swinging device for a hanging tool comprising:

18. A swinging device for a hoisting device, wherein a sheave is provided at a central portion in the longitudinal direction, and an axial center of the sheave is inclined at 45 degrees with respect to the longitudinal direction. .