JP2023111751A - Suspended load rotating device - Google Patents

Abstract

To provide a suspended load rotating device capable of rotating a suspended load horizontally and vertically.SOLUTION: A suspended load rotating device 20 comprises: a rotating device main body 40 suspended from a crane 1 having a main hook 12 and a sub hook 17; a first rope 71 connecting the sub hook 17 and one end of a suspended load W; a second rope 72 connecting the rotating device main body 40 and the other end of the suspended load W. The rotating device main body 40 has: an opening 50 provided on the center of the rotating device main body 40, through which the first rope 71 is inserted; and a thrust portion (propeller 22) for horizontally rotating the rotating device main body 40 around the opening 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to a suspended load rotating device.

Conventionally, a crane, which is a representative working vehicle, is known. A crane is mainly composed of a traveling body and a revolving body. The traveling body has a plurality of wheels and is self-propelled. The revolving structure is equipped with wire ropes and hooks in addition to the boom so that the suspended load can be transported.

By the way, when the suspended load is a steel material or the like that constitutes a building, the direction of the suspended load may be adjusted by pulling the intermediary rope tied to the suspended load to rotate the suspended load in the horizontal direction. However, the work of pulling the rope to rotate the suspended load in the horizontal direction poses a problem that there is a risk of overturning or falling from a high place, and extra personnel are required. In addition, by using two cranes to hang one load, so-called co-hoisting, the load may be rotated in the vertical direction to adjust the direction of the load. However, the task of rotating the suspended load in the vertical direction by co-suspension has the problem that it is difficult to operate the crane and that extra personnel and cranes are required.

Conventional technology includes a device for horizontally rotating a suspended load (see Patent Document 1). The device described in Patent Literature 1 adjusts the attitude of a material (hanging load) during lifting by winding (winding in) and unwinding (unwinding) an auxiliary winding wire rope (sub wire rope) of a crane. (Rotating in the vertical direction). Further, in the prior art, there is a device for horizontally rotating a suspended load (see Patent Document 2). The device described in Patent Literature 2 adjusts the direction of a suspended load (rotates in the horizontal direction) by controlling the direction around the vertical axis of a sling using an air blower. However, the devices described in Patent Documents 1 and 2 have a problem in that either one of vertical rotation and horizontal rotation cannot be performed. In actual work, it is necessary to rotate the suspended load in the vertical and horizontal directions, so there has been a demand for a suspended load rotation device capable of rotating the suspended load in the horizontal and vertical directions.

JP-A-10-194666 JP-A-10-305989

Provided is a suspended load rotating device capable of rotating a suspended load horizontally and vertically.

The first invention is
a rotating device body suspended by a crane having a main hook and a sub hook;
a first rope connecting the sub-hook and one end of the suspended load;
A suspended load rotating device comprising a second rope connecting the rotating device main body and the other end of the suspended load,
The rotating device main body is
an opening provided in the center of the rotating device main body and through which the first rope is inserted;
and a thrust part for horizontally rotating the rotating device main body about the opening.

As effects of the present invention, the following effects are obtained.

According to the suspended load rotating device according to the first invention, the suspended load can be rotated in the horizontal direction and the vertical direction.

A diagram showing a crane. The figure which shows a suspended load rotation apparatus. The figure which shows a hanging balance. The figure which shows a suspended load rotation apparatus main body. The figure which shows a plate. The figure which shows a rotating member. The figure which shows a swivel stopper. The figure which shows the operation|movement which rotates a suspended load in a perpendicular direction. The figure which shows the operation|movement which rotates a suspended load horizontally. The figure which shows a suspended load rotation apparatus. The figure which shows a suspended load rotation apparatus main body. The figure which shows the operation|movement which rotates a suspended load in a perpendicular direction. The figure which shows the operation|movement which rotates a suspended load horizontally.

The technical ideas disclosed in the present application can be applied to other embodiments in addition to the embodiments described below.

As shown in FIG. 1, a crane 1 is mainly composed of a traveling body 2 and a revolving body 3. As shown in FIG.

The traveling body 2 has a pair of left and right front wheels 4 and rear wheels 5 . In addition, the traveling body 2 is provided with an outrigger 6 that is grounded and stabilized when carrying out a load carrying operation. In addition, the traveling body 2 can turn the rotating body 3 supported on the top thereof by a turning motor 7 .

The revolving body 3 has a boom 8 projecting forward from its rear portion. The boom 8 can be swiveled by a swivel motor 7 . Also, the boom 8 is telescopically telescopic by means of a telescopic cylinder 9 . Furthermore, the boom 8 can be raised and lowered by a raising and lowering cylinder 10 .

In addition, a main wire rope 11 is laid across the boom 8 . A main hook 12 is hung from a main wire rope 11 that hangs down from the tip of the boom 8 . A main winch 13 is provided near the base end of the boom 8 . The main winch 13 is integrally formed with a winding hydraulic motor 14, and enables the main wire rope 11 to be wound in and out. Therefore, the main hook 12 can be moved up and down by the winding hydraulic motor 14 .

In addition, a sub wire rope 16 is laid across the boom 8 . A sub-hook 17 is hung from a sub-wire rope 16 hanging down from the tip of the boom 8 . A sub winch 18 is provided near the base end of the boom 8 . The sub winch 18 is configured integrally with a winding hydraulic motor 19 to enable winding in and unwinding of the sub wire rope 16 . Therefore, the sub hook 17 can be moved up and down by the winding hydraulic motor 19 .

Next, the suspended load rotation device 20 provided on the crane 1 will be described with reference to FIGS. 2 to 9. FIG. 4A shows a front view of the rotating device main body 40. FIG. 4B shows a perspective view of the rotating device main body 40. FIG.

As shown in FIG. 2, the suspended load rotation device 20 mainly includes a suspension balance 30 (suspension member), a rotation device main body 40, a swivel stopper 60 (connection member), a movable rope 71 (first rope), and a suspension rope 72. (second rope) and a remote control 80 are provided. The first rope connects the sub-hook 17 and one end of the suspended load W, and in this embodiment, it is connected via the swivel stopper 60 and the hanging rope 73 (third rope). The second rope connects the rotating device main body 40 and the other end of the suspended load W. As shown in FIG. In addition, below, the horizontal direction parallel to the extension direction of the boom 8 is demonstrated as the front-back direction, and the horizontal direction orthogonal to the extension direction of the boom 8 is width direction.

As shown in FIGS. 2, 3 and 8, the suspension balance 30 keeps the distance between the main hook 12 and the sub wire rope 16 constant. The suspension balance 30 is connected to the main hook 12 via a suspension rope 75 (fourth rope). The suspension balance 30 has a plate 31 (first plate), a plate 32 (second plate), a plate 33 (third plate), a sieve 34 (fifth sieve), and a sieve 35 (sixth sieve).

The plate 31 is provided with the width direction as its longitudinal direction. The plate 31 is provided with holes 36 for connecting the suspension ropes 74 and 75 at the four corners. The plate 31 is fixed (connected) by inserting suspension ropes 75 into holes 36 provided at the upper ends of both ends in the width direction. Each is inserted and fixed (connected).

The plate 32 is provided so as to horizontally protrude from one side in the width direction of the plate 32 toward the side immediately below the sub hook 17 . The plate 33 is provided so as to horizontally protrude from the other side of the plate 32 in the width direction toward the side immediately below the sub hook 17 . The plate 32 and the plate 33 protrude toward the side directly below the sub-hook 17 so as to approach each other, and protrude directly below the sub-hook 17 so as to be parallel to each other.

The sheaves 34 and 35 are provided between the plate 32 and the plate 33 adjacent to each other in the front-rear direction. The sheave 34 and the sheave 35 have the sub wire rope 16 inserted between the outer circumference of the sheave 34 and the outer circumference of the sheave 35 . The sheaves 34 and 35 are rotatable about the width direction, and sandwich the sub-wire rope 16 to be wound in and unwound in grooves on the outer periphery.

As shown in FIGS. 2 and 4 , the rotating device main body 40 serves as the main body of the suspended load rotating device 20 . The rotating device main body 40 is connected to the suspension balance 30 via a suspension rope 74 . The rotating device main body 40 has a plate 41 , a rotating member 42 , an arm 43 , a propeller 44 (thrust portion), a sheave 45 , a sheave 46 , a sheave 47 , a torque transmission member 48 and an electric circuit portion 49 . The rotating device main body 40 is provided with an opening 50 penetrating vertically in the center in plan view.

As shown in FIG. 5, the plate 41 has a circular hole 51 (opening 50) in the center into which the rotating member 42 is inserted. A movable rope 71 (see FIG. 2) is inserted through a hole 51 of the plate 41 . The plate 41 has an octagonal shape in a plan view, and an outer edge portion 52 extending upward is formed at the outer edge. The plate 41 is provided with holes 53 at both ends in the width direction of the outer edge 52 , and suspension ropes 74 are inserted through the holes 53 and fixed (connected).

As shown in FIGS. 4 and 6, the rotating member 42 includes a disc portion 55 having a round-cornered square (track-shaped) hole 54 (opening portion 50) in the center and a and two extending side plate portions 56 . A movable rope 71 (see FIG. 2) is inserted through a hole 54 of the rotating member 42 . The rotating member 42 is provided so that the side plate portions 56 face each other, and the lower sides of the side plate portions 56 are tapered.

The rotating member 42 is connected to the plate 41 via a bearing 57 with the side plate portion 56 inserted into the hole 51 of the plate 41 . The rotating member 42 is provided with arms 43 on the upper sides of the two side plate portions 56, respectively. The arms 43 are directed in opposite directions and extend horizontally. The arm 43 is provided with a propeller 44 (thrust section) at its tip so that the wind blows out in the horizontal direction of rotation. One arm 43 is provided with one propeller 44 for clockwise rotation and one for counterclockwise rotation. As a result, the rotating device main body 40 can freely rotate clockwise and counterclockwise around the opening 50 .

The rotary member 42 is provided with sheaves 45 , 46 and 47 for holding the movable rope 71 (see FIG. 2) inside the two side plate portions 56 .

The sheaves 45 and 46 are horizontally adjacent to each other on the upper side of the side plate portion 56 . A movable rope 71 (see FIG. 2) is inserted between the outer circumference of the sheave 45 and the outer circumference of the sheave 46 between the sheaves 34 and 35 . The sheaves 45 and 46 are rotatable about a direction perpendicular to the surfaces of the two side plate portions 56 facing each other, and hold a movable rope 71 pulled vertically between grooves on the outer periphery.

A pin 58 of the sheave 47 is provided on the lower side of the side plate portion 56 at a position separated from the movable rope 71 (see FIG. 2) by the pitch circle radius of the sheave 47 toward one end side of the suspended load W. ing. The sheave 47 is rotatable around a direction orthogonal to the surfaces of the two side plate portions 56 facing each other, and supports a movable rope 71 pulled vertically by grooves on its outer periphery.

The rotary member 42 is provided with a torque transmission member 48 via a pin 59 inside two side plate portions 56 . The rotary member 42 is provided with an electric circuit portion 49 on the outside of one side plate portion 56 . The electric circuit section 49 has a wireless device, a CPU, a battery, an inertial sensor, etc. for communicating with the remote controller 80 (see FIG. 2). The remote controller 80 is a controller that operates the rotation of the suspended load W. As shown in FIG.

As shown in FIGS. 2 and 9, the torque transmission member 48 transmits torque for rotating the load W in the horizontal direction. The torque transmission member 48 is provided at the lower center of the rotating device main body 40 . The torque transmission member 48 has a plate-like member and is provided rotatably in the vertical direction about the upper end of the torque transmission member 48 as an axis. Here, in order to rotate the suspended load W by 90 degrees in the vertical direction, the movable rope 71 and the suspension rope 72 must originally intersect at one point on the rotating device main body 40 side. On the other hand, when the rotary device main body 40 is horizontally rotated while the movable rope 71 and the suspension rope 72 intersect at one point, the movable rope 71 and the suspension rope 72 are twisted, making it difficult to transmit torque to the suspended load W. Therefore, the torque transmission member 48 is provided at the lower center of the rotating device main body 40 , and the suspension rope 72 is connected to the lower end of the torque transmission member 48 . As a result, the fulcrum interval between the movable rope 71 and the suspension rope 72 on the rotating device main body 40 side is widened, and the movable rope 71 and the suspension rope 72 are less likely to be twisted, so torque can be easily transmitted to the suspended load W.

As shown in FIGS. 2 and 7, the swivel stopper 60 rotatably holds the movable rope 71 and maintains the horizontal posture of the suspended load W while the swivel stopper 60 is in contact with the rotating device main body 40. is. The swivel stopper 60 has a stopper 61 , a connecting pin 62 , a bearing 63 and a rotating member 64 .

The stopper 61 has a disk portion 66 provided with a rounded rectangular hole 65 overlapping the opening 50 (see FIG. 4B), and two side plate portions 68 extending upward from the upper surface of the disk portion 66 . ing. Since the outer diameter of the disk portion 66 of the stopper 61 is larger than the distance between the opposed straight portions of the hole 54 (see FIG. 6) of the rotary member 42, the lower surface of the disk portion 66 is 6), that is, the edge 67 of the opening 50 (see FIG. 4B). Also, the stopper 61 is provided so that the side plate portions 68 face each other.

The connection pin 62 is provided inside the two side plate portions 68 above the hole 65 . The connection pin 62 is a rod-shaped member extending in a direction perpendicular to the surfaces of the two side plate portions 56 facing each other, and both ends of the connection pin 62 are fixed to the side plate portions 68, respectively. A movable rope 71 inserted through a hole 65 is fixed (connected) to the connection pin 62 .

The rotating member 64 is provided on the upper end of the stopper 61 via a bearing 63 . The rotating member 64 is a plate-shaped member that protrudes upward, and has a hole 69 that penetrates in the horizontal direction. The rotating member 64 is fixed (connected) by inserting a hanging rope 73 connected to the sub hook 17 through a hole 69 .

As shown in FIG. 2, the movable rope 71 is connected to one end of the suspended load W. As shown in FIG. The movable rope 71 is connected to the connection pin 62 (see FIG. 7) of the swivel stopper 60 through the opening 50 (see FIG. 4B) of the rotating device main body 40 as described above.

The suspension rope 72 is connected to the other end of the load W to be suspended. The hanging rope 72 is connected to the lower end of the torque transmission member 48 as described above. The lengths of the movable rope 71, the suspension rope 72, the suspension rope 74 (from the suspension balance 30 to the rotating device main body 40), and the suspended load W (from one end to the other end) are set so as to satisfy the following conditional expressions.
Suspended load W<torque transmission member 48+suspension rope 72<movable rope 71<suspension rope 74

The remote controller 80 is for operating the rotation of the rotating device main body 40 . The remote control 80 is composed of a wireless communication device for sending control signals, a CPU, a switch, a lever, and the like. The remote controller 80 is configured so that the electric circuit section 49 operates the propeller 44 by operating a lever or the like, and the horizontal rotation of the rotating device main body 40 can be adjusted. Note that the remote controller 80 is not particularly limited as long as it is capable of wirelessly transmitting a control signal to the rotating device main body 40, and any circuit configuration, switch configuration, and the like may be used.

Next, the operation of rotating the suspended load W in the vertical direction will be described with reference to FIG. In addition, let the state where the suspended load W is horizontal shown in FIG. 8(A) be an initial state.

When the suspended load W is horizontal, the suspended load rotating device 20 causes the suspended rope 73 connected to the sub-hook 17 to slack, and tension is generated only in the main hook 12 . As a result, the suspended load rotating device 20 contacts the upper surface of the disk portion 55 (see FIG. 6) of the rotating member 42 while the swivel stopper 60 is pulled downward by the movable rope 71, and the upper end of the movable rope 71 is restrained. Therefore, the horizontality of the suspended load W can be maintained. As shown in FIG. 8(B), the crane 1 hoists the sub-wire rope 16 of the suspended load rotating device 20 so that the movable rope 71 is pulled upward, and the suspended load W is rotated in the range of 0 degrees to 90 degrees. It can be rotated vertically. Further, by keeping the distance between the main hook 12 and the sub wire rope 16 constant by the suspension balance 30, it is possible to prevent the main hook 12 and the sub wire rope 16 from interfering when the suspended load W rotates in the vertical direction.

Next, the operation of horizontally rotating the suspended load W will be described with reference to FIG. Note that the state shown in FIG. 9A is the initial state.

The suspended load rotation device 20 operates the propeller 44 based on a control signal sent from the remote controller 80 to generate a torque that rotates the suspended load W in the horizontal direction. The suspended load rotating device 20 has a rotating member 42 connected to a plate 41 via a bearing 57 . As a result, as shown in FIG. 9B, the rotating member 42 rotates horizontally with respect to the plate 41 in the suspended load rotating device 20 . The suspended load rotating device 20 eliminates twisting of the movable rope 71 caused by rotation in the horizontal direction by means of the bearing 63 and prevents the sub wire rope 16 from entangling the main hook 12 . In addition, since the positional relationship above the plate 41 does not change, the suspended load rotating device 20 can rotate the suspended load W horizontally and rotate the suspended load W vertically.

According to the suspended load rotating device 20 configured as described above, the suspended load W can be rotated in the horizontal direction and the vertical direction. Moreover, the suspended load W can be rotated in the horizontal direction and the vertical direction with one device or hanging tool (the main hook 12 and the sub hook 17). Furthermore, the suspended load W can be rotated vertically and horizontally at the same time. Therefore, the efficiency of the work for rotating the suspended load W can be improved. In addition, the work can be performed more safely than rotating the suspended load W using an intervening rope or co-suspension. In addition, since a power source for rotating the suspended load W in the vertical direction is not used, the weight of the device is reduced.

Next, a suspended load rotation device 21 according to a second embodiment will be described with reference to FIGS. 10 to 13. FIG. In addition, hereinafter, by using the names and symbols used in the description of the suspended load rotating device 20 according to the first embodiment, the same items are indicated. Also, the description will focus on the parts that are different from the suspended load rotating device 20 according to the first embodiment. 11A shows a front sectional view of the rotating device main body 90. FIG. 11B shows a side cross-sectional view of the rotating device main body 90. FIG. In FIG. 11, the suspension rope 74 is omitted. In this embodiment, the movable rope 77 (first rope) connects the sub hook 17 and one end of the suspended load W via the suspension rope 73 , the bearing 114 , the frame 92 and the pin 102 .

As shown in FIGS. 10 and 11, the rotating device main body 90 is connected to the suspension balance 30 via a suspension rope 74, and includes a frame 91 (first frame), a frame 92 (second frame), a frame 93, and a sheave 94. (first sheave), sheave 95 (second sheave), sheave 96 (third sheave), sheave 97 (fourth sheave), sheave 98, sheave 99, sheave 100 and sheave 101. Sheaves 94-101 are provided on pins 102-109, respectively.

The frame 91 has an upper frame 110 on which the sheaves 94 to 97 are provided and a lower frame 111 on which the sheaves 98 and 99 are provided. The frame 92 is provided inside the upper frame 110 so as to be vertically slidable via slide rails 112 . The frame 93 is connected to the upper end of the upper frame 110 via a bearing 113 so as to be rotatable about the vertical direction.

The rotating device main body 90 is provided with an opening 116 penetrating vertically in the center in plan view. The opening 116 includes a hole through which the hanging rope 73 is inserted in the upper portion of the frame 93 , a hole through which the movable ropes 77 and 78 (second rope) are inserted in the lower frame 111 , and an inner portion of the rotating device main body 90 . and a space of The rotating device main body 90 can be freely rotated clockwise and counterclockwise around the opening 116 by the propeller 44 .

Both ends of the pin 102 are connected to the frame 92 above the pin 103 . Both ends of the pin 104 are connected to the upper frame 110 above the pin 105 . The pins 103 and 105 are horizontally aligned with each other, with both ends of the pin 103 connected to the upper frame 110 and both ends of the pin 105 connected to the frame 92 . The pins 106 and 107 are horizontally aligned with each other and both ends are connected to the lower frame 111 . The pins 108 and 109 are horizontally aligned with each other and are connected to the frame 93 at both ends.

The pin 102 is provided with n sheaves 94 (n is an arbitrary number), the pin 103 is provided with 2n sheaves 95, the pin 104 is provided with n sheaves 96, and the pin 105 is provided with n−1 sheets of sheaves 97 . As for the number of ropes, the sheave 94 has 2n+1 ropes, the sheave 95 has 2n ropes, the sheave 96 has 2n ropes, and the sheave 97 has 2n−1 ropes. The pin 106 is provided with one sheave 98, the pin 107 is provided with one sheave 99, the pin 108 is provided with one sheave 100, and the pin 109 is provided with one sheave 99. A sheave 101 is provided.

One end of the movable rope 77 is connected to the pin 102 . The movable rope 77 is alternately wound around the sheave 94 and the sheave 95, and after being wound around the sheave 98, the other end is connected to one end of the suspended load W. As shown in FIG. One end of the movable rope 78 is connected to the pin 105 . The movable rope 78 is alternately wound around the sheave 96 and the sheave 97 , and after being wound around the sheave 99 , the other end is connected to the other end of the suspended load W. One end of the hanging rope 73 is connected to the frame 92 via a bearing 114 . Suspension rope 73 is sandwiched between grooves on the outer periphery of sheave 100 and sheave 101 , and the other end of suspension rope 73 is connected to sub-hook 17 . The length of the movable ropes 77 and 78 is set so that the suspended load W is horizontal while the frame 92 is in contact with the bottom of the upper frame 110 . Note that the torque transmission member 115 is provided at the lower center of the rotating device body 90 . The torque transmission member 115 has two sheaves (not shown) and sandwiches the movable rope 78 with grooves on the outer periphery thereof. Although the torque transmission member 115 is provided on the movable rope 78 , it may be provided on the movable rope 77 .

Next, the operation of rotating the suspended load W in the vertical direction will be described with reference to FIG. 12 . Note that the state shown in FIG. 12A is the initial state.

The suspended load rotation device 21 causes the suspended rope 73 connected to the sub-hook 17 to slack when the suspended load W is horizontal, and tension is generated only in the main hook 12 . As a result, the suspended load rotation device 21 stands still while the frame 92 is in contact with the bottom of the upper frame 110, and the winding of the movable rope 77 and the unwinding of the movable rope 78 are not performed. can keep. As shown in FIG. 12(B), the crane 1 hoists the sub wire rope 16 so that the suspended load rotating device 21 rises until the frame 92 comes into contact with the ceiling of the upper frame 110 . Accordingly, in the suspended load rotating device 21 , the sheave 94 is separated from the sheave 95 and the sheave 97 is brought closer to the sheave 96 . In the suspended load rotating device 21 , the movable rope 77 is wound around the sheaves 94 and 95 , and the movable rope 78 is unwound from the sheaves 96 and 97 . Thereby, the suspended load rotating device 21 can rotate the suspended load W in the vertical direction within a range of 0 degrees to 90 degrees.

Next, the operation of horizontally rotating the suspended load W will be described with reference to FIG. 13 . Note that the state shown in FIG. 13A is the initial state.

The suspended load rotation device 21 operates the propeller 44 based on a control signal sent from the remote controller 80 to generate a torque that rotates the suspended load W in the horizontal direction. The suspended load rotating device 21 has a frame 91 connected to a frame 93 via a bearing 113 . Thereby, as shown in FIG. 13(B), the frame 91 of the suspended load rotating device 21 rotates in the horizontal direction with respect to the frame 93 . The suspended load rotation device 21 eliminates the twist of the suspension rope 73 caused by horizontal rotation by means of the bearing 114 and prevents the sub wire rope 16 from entangling the main hook 12 . In addition, since the positional relationship above the frame 93 does not change, the suspended load rotating device 21 can rotate the suspended load W horizontally and rotate the suspended load W vertically.

According to the suspended load rotating device 21 configured as described above, the movable ropes 77 and 78 are hung around the sheaves 94 to 97, whereby the suspended load W is rotated from the suspended load rotating device 21 (upper end of the suspension rope 75). distance can be shortened. That is, compared with the suspended load rotating device 20, the lifting height (the height of the suspended load W from the ground) can be increased. Also, the stroke of the sub hook 17 for rotating the suspended load W in the vertical direction can be reduced. In addition, by increasing the number n of the sheaves 94 to 97, the stroke of the sub hook 17 required for rotating the suspended load W in the vertical direction can be further reduced.

An embodiment in which the suspended load W is rotated in the vertical direction by pulling the first rope upward with the sub hook 17 has been described above. It is good also as a structure which rotates the suspended load W to a perpendicular direction by pulling upwards. That is, the technical idea of the present application can be applied to cranes having a plurality of hooks.

Reference Signs List 1 crane 12 main hook 17 sub hook 20 suspended load rotating device 21 suspended load rotating device 31 plate (first plate)
32 plate (second plate)
33 plate (third plate)
34 sheave (5th sheave)
35 sheave (6th sheave)
40 Rotating device body 44 Propeller (thrust part)
48 torque transmission member 50 opening 60 swivel stopper (connection member)
61 stopper 62 connection pin 63 bearing 64 rotating member 71 movable rope (first rope)
72 suspension rope (second rope)
73 Suspension rope (third rope)
75 suspension rope (fourth rope)
77 movable rope (first rope)
78 movable rope (second rope)
90 rotating device body 91 frame (first frame)
92 frames (second frame)
94 sheave (first sheave)
95 sheave (second sheave)
96 sheave (third sheave)
97 sheave (fourth sheave)
115 torque transmission member 116 opening W suspended load

Claims (5)

a rotating device body suspended by a crane having a main hook and a sub hook;
a first rope connecting the sub-hook and one end of the suspended load;
A suspended load rotating device comprising a second rope connecting the rotating device main body and the other end of the suspended load,
The rotating device main body is
an opening provided in the center of the rotating device main body and through which the first rope is inserted;
and a thrust section for horizontally rotating the main body of the rotating apparatus about the opening. comprising a connection member connected to the first rope;
The connection member is
a stopper having a hole that overlaps with the opening and abutting an edge of the opening;
a connection pin provided on the stopper above the hole and to which the first rope inserted through the hole is connected;
2. The suspended load rotating device according to claim 1, further comprising a rotating member provided at the upper end of the stopper via a bearing and to which a third rope connected to the sub hook is connected. The rotating device main body is
a first frame;
a second frame slidably supported in the vertical direction with respect to the first frame;
a second sheave and a third sheave provided on the first frame;
a first sheave and a fourth sheave provided on the second frame,
The first rope is alternately wound around the first sheave and the second sheave, and an end of the first rope is connected to a pin of the first sheave,
The second rope is alternately wound around the third sheave and the fourth sheave, and an end of the second rope is connected to a pin of the fourth sheave. Item 1. A suspended load rotation device according to Item 1. a fourth rope connected to the main hook;
and a hanging member connected to the fourth rope,
The hanging member is
a first plate to which the fourth rope is connected;
a second plate protruding from one side of the first plate toward the side directly below the sub-hook;
a third plate protruding from the other side of the first plate toward the side directly below the sub-hook;
and a fifth sheave and a sixth sheave that are provided between the second plate and the third plate and sandwich the sub wire rope that suspends the sub hook. Item 4. The suspended load rotation device according to any one of items 3. The rotating device main body is
Having a torque transmission member provided at the lower center of the rotating device main body,
The load rotation device according to any one of claims 1 to 4, wherein the torque transmission member is vertically rotatable about the upper end of the torque transmission member.

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