JP7383520B2 - Hanging equipment - Google Patents

Description

The present invention relates to a hanging device that is suspended from a trolley by a rope, and more particularly to a hanging device that can improve the anti-vibration effect in the short side direction of the hanging device without increasing the size of the trolley.

Various cranes have been proposed that have hanging tools suspended from a trolley by ropes (see, for example, Patent Document 1). The crane described in Patent Document 1 has a structure in which the rope is stretched in a W-shape along the long side of the hanging device, and the rope is stretched in a V-shape along the short side of the hanging device. It was equipped with

When a rope is stretched in a V-shape or W-shape, a horizontal force is generated from the inclined portion in accordance with the tension. The swinging of the hanging tool in the long side direction and the short side direction was suppressed by this horizontal force. In the crane described in Patent Document 1, the rope stretched between the trolley and the hoist can provide a steadying effect for the hoist.

For example, in the crane described in Patent Document 1, when considering improving the steadying effect in the short side direction, it was necessary to widen the upper interval of the rope stretched in a V-shape along the short side direction. In this case, it was necessary to make the trolley larger along the short side.

Japanese Patent Application Publication No. 2015-193462

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a hanging device that can improve the steadying effect in the short side direction of the hanging device without increasing the size of the trolley.

A hanging device for achieving the above purpose is formed into a substantially rectangular shape having a pair of long sides and a pair of short sides when viewed from above, and is equipped with at least four lower sheaves, and has an axial direction. A lower sheave Sax1 and a lower sheave Sax2 are parallel to the long side direction, which is an extension direction of the long side, and are installed on one end side of the hanging tool in the long side direction, and a lower sheave Sax2 is installed on the other end side of the hanging tool. The lower sheave Sax3 and the lower sheave Sax4 are in a state in which the axial direction in plan view is between the short side direction and the long side direction, which are the extension directions of the short sides, and inward from the four corners of the hanging tool in plan view. The lower sheave Sa1, the lower sheave Sa2, the lower sheave Sa3, and the lower sheave Sa4 are installed on the hanging tool to support the lower sheave Sa1, the lower sheave Sa2, the lower sheave Sa3, and the lower sheave Sa4, respectively. a support stand, the support stand is provided with a structure that supports the lower sheaves Sa1, Sa2, Sa3, and Sa4 in a state in which the support stand can be tilted along the axial direction; The sheaves Sa1, Sa2, Sa3, and Sa4 are arranged at positions corresponding to respective vertices of a substantially rectangular shape formed inside the hanging tool in plan view, and are arranged at intervals in the long side direction. The spacing L1 between the axes of the sheaves Sa1 and Sa3 is set to 20 to 80% of the length L0 of the long side of the hanging tool, and the four lower sheaves Sa1, Sa2, Sa3 in plan view , Sa4, the axial directions of the adjacent lower sheaves Sa1, Sa2, Sa3, and Sa4 intersect in plan view on the outside of the substantially rectangular shape formed by Sa4.

According to the present invention, when the rope is stretched between the upper sheave installed on the trolley and the lower sheave installed on the hanging device, the rope is inclined from the top and bottom in both the short side direction and the long side direction. It becomes possible to stretch the rope so that the condition is reached. Since the rope stretched along the long side direction can be inclined in the short side direction, it is advantageous for improving the steadying effect of the hanging device in the short side direction.

FIG. 3 is an explanatory diagram illustrating a hanging tool in a plan view. FIG. 2 is an explanatory diagram illustrating the view of arrow AA in FIG. 1; FIG. 2 is an explanatory diagram schematically illustrating FIG. 1. FIG. FIG. 4 is an explanatory diagram illustrating a state in which a rope is stretched on the hanging tool of FIG. 3; FIG. 5 is an explanatory diagram illustrating a state of a rope stretched in the short side direction of FIG. 4; FIG. 5 is an explanatory diagram illustrating the state of the rope stretched in the long side direction of FIG. 4; FIG. 7 is an explanatory diagram illustrating the view of arrow BB in FIG. 6; 7 is an explanatory diagram illustrating the CC arrow view of FIG. 6. FIG. FIG. 7 is an explanatory diagram illustrating an enlarged example of the lower sheave in FIG. 6; 4 is an explanatory diagram illustrating a modification of FIG. 3. FIG. FIG. 11 is an explanatory diagram illustrating a state in which a rope is stretched on the hanging tool of FIG. 10; FIG. 12 is an explanatory diagram illustrating the view from the DD arrow in FIG. 11;

Hereinafter, the hanging tool will be described based on the embodiment shown in the drawings. In the figure, the short side direction, which is the extension direction of the short side of the hanging tool, is indicated by arrow x, and the long side direction, which is a direction that crosses this short side direction x at right angles and is also the extension direction of the long side of the hanging tool, is indicated by arrow y. The vertical direction is indicated by an arrow z.

As illustrated in FIGS. 1 and 2, the hanger 1 is formed into a substantially rectangular shape having a pair of long sides and a pair of short sides when viewed from above. The hanging device 1 is composed of, for example, a spreader for handling containers, a bucket for handling loose cargo such as ore, and the like. The hanging device 1 may be composed of a head block connected to the upper surface of the spreader. In this embodiment, the hanging device 1 is comprised of a spreader for handling a 20ft container. This spreader can also slide in the long side direction to handle a 40ft container.

The hanging tool 1 is installed, for example, in a portal crane, and is suspended via a rope from a trolley that moves along a horizontal beam of the portal crane. The crane is not limited to a gate type crane, but may be any crane equipped with a trolley and a hanging device, and may be configured with a quay crane, an unloader, or an overhead crane, for example.

For example, the hoist 1 is installed on the crane so that the long side direction y is parallel to the traveling direction of the crane, and the short side direction x is parallel to the traverse direction, which is the moving direction of the trolley. A plurality of lower sheaves Sa are installed on the upper surface of the hanging tool 1.

As illustrated in FIGS. 1 and 2, the four lower sheaves Sax (Sax1, Sax2, Sax3, Sax4) are installed on the hanger 1 with their axial directions parallel to the long side direction y. Lower sheaves Sax1 and Sax2 and lower sheaves Sax3 and Sax4 are installed at positions near both ends of the hanging tool 1 in the long side direction y, respectively. The lower sheave Sax is installed at a position approximately at the center of the hanging tool 1 in the short side direction x.

The four lower sheaves Sa (Sa1, Sa2, Sa3, Sa4) are installed on the hanger 1 with their axial directions between the short side direction x and the long side direction y in plan view. That is, the axial direction of the lower sheave Sa is, for example, a direction inclined at a predetermined angle from the short side direction x with the vertical direction z as the central axis. The axial direction of the lower sheave Sa is a direction that is not parallel to either the short side direction x or the long side direction y. Lower sheaves Sa1 and Sa3 and lower sheaves Sa2 and Sa4 are installed at positions near both ends of the hanging tool 1 in the short side direction x, respectively. The lower sheave Sa1 and the lower sheave Sa3 are located inside both ends of the hanging tool 1 in the long side direction y, and are installed at intervals in the long side direction y. Similarly, the lower sheave Sa2 and the lower sheave Sa4 are installed with an interval in the long side direction y.

As illustrated in FIG. 3, the four lower sheaves Sa1-Sa4 are arranged at positions closer to the inside in the long side direction y. The distance L1 between the axes of the pair of lower sheaves Sa1 and lower sheaves Sa3 in the long side direction y is set in a range of 20 to 80% of the length L0 of the long side of the hanging tool 1. It is desirable that the interval L1 be set within a range of 20 to 50% of the length L0 of the long side. Note that the length L0 of the long side of the hanging device 1 is based on the size of a spreader for handling a 20 ft container. In the case of a spreader extended to handle a 40ft container, the length of the long side is approximately twice the length of L0, so the interval L1 is 10 to 40% of the length of the long side of the hanging device 1, preferably 10%. It is set in the range of ~25%.

It is desirable that the four lower sheaves Sa1 to Sa4 be installed at positions corresponding to the respective vertices of a substantially rectangular shape formed inside the hanger 1 in plan view. In FIG. 3, the above-mentioned substantially rectangle is shown by a broken line for explanation. The area of the rectangle indicated by the broken line is set to be smaller than the area of the hanging tool 1 in plan view. The long sides of the rectangle shown by broken lines are parallel to the long sides of the hanging tool 1, and the short sides of the rectangle shown by broken lines are parallel to the short sides of the hanging tool 1. The lower sheave Sa is arranged such that the axis of the lower sheave Sa coincides with each vertex of the rectangle indicated by the broken line.

As illustrated in FIG. 3, the axial direction of the lower sheave Sa is set in a substantially horizontal direction that is not parallel to either the long side direction y or the short side direction x. In FIG. 3, the axial direction of the lower sheave Sa is shown by a chain line for explanation. The angle θ between the axial direction of the lower sheave Sa and the short side direction x can be set, for example, in the range of 10 degrees to 60 degrees or -10 degrees to -60 degrees. This angle θ is not limited to this and can be changed as appropriate.

In the embodiment illustrated in FIG. 3, each lower sheave Sa is installed on the hanging tool 1 in such a manner that the axial directions of the lower sheaves Sa shown by dashed-dot lines intersect on the outside of the rectangle shown by the broken line. That is, the axial directions of adjacent lower sheaves Sa intersect on the outside of the quadrangle formed by the four lower sheaves Sa.

When the hanging tool 1 is installed on the crane 2 as illustrated in FIG. 4, the lifting tool 1 is suspended from the trolley 3 placed above the lifting tool 1 via the rope R. In FIG. 4, the trolley 3 is shown by a broken line for explanation. The trolley 3 is configured to traverse in the short side direction x along the horizontal beam of the crane 2. A plurality of upper sheaves Sb are installed on the trolley 3. A rope R is stretched between the upper sheave Sb of the trolley 3 and the lower sheave Sa of the hanging tool 1.

A drum 4 for feeding out and winding up the rope R is installed on the upper surface of the trolley 3. In this embodiment, the drum 4 is arranged so that its axial direction is parallel to the long side direction y, and at a position that is approximately at the center of the trolley 3 in the short side direction x. Two drums 4 are installed on the trolley 3. A speed reducer 5 is installed between the two drums 4 to transmit the rotational force received from the motor to the drum 4. The reduction gear 5 allows the two drums 4 to rotate in the same direction and at the same speed.

The configuration of the drum 4 is not limited to the above. The two drums 4 may each have a reduction gear 5, and the rotating direction and rotation speed may be controlled respectively. Further, the drum 4 may be composed of one drum that is arranged approximately in the center of the trolley 3 in the short side direction x with the long side direction y as the axial direction, or one or more drums with the short side direction x as the axial direction. It may also consist of two drums.

In this embodiment, four tilting mechanisms J are installed on the trolley 3. The tilting mechanism J is installed approximately at the center of the trolley 3 in the long side direction y, and near both ends of the trolley 3 in the short side direction x. The tilting mechanism J is composed of an electric jack that is extendable and retractable along the long side direction y. The tilting mechanism J is not limited to this, and may have a function of varying the tension of the connected rope R. The tilting mechanism J can be configured, for example, by a combination of a sheave and a link mechanism, a telescoping cylinder, or a combination of a telescoping cylinder and a sheave.

As illustrated in FIG. 5, the four upper sheaves Sbx (Sbx1, Sbx2, Sbx3, Sbx4) are installed on the trolley 3 with their axial directions aligned in the short side direction x. Upper sheaves Sbx1 and Sbx2 and upper sheaves Sbx3 and Sbx4 are installed at positions near both ends of the trolley 3 in the long side direction y, respectively. The upper sheave Sbx1 and the upper sheave Sbx2 are respectively installed at positions near both ends of the trolley 3 in the short side direction x. Similarly, the upper sheave Sbx3 and the upper sheave Sbx4 are respectively installed at positions near both ends of the trolley 3 in the short side direction x.

A rope Rx1 let out from one of the drums 4 and stretched along the short side direction x is passed around the lower sheave Sax1 and the upper sheave Sbx1, and its end portion is connected to the tilting mechanism J1. The rope Rx2 let out from the drum 4 is passed around the lower sheave Sax2 and the upper sheave Sbx2, and its end is connected to the tilting mechanism J2.

Similarly to the above, the rope Rx3 let out from the other drum 4 and stretched along the short side direction x is passed around the lower sheave Sax3 and the upper sheave Sbx3, and its end is connected to the tilting mechanism J1. . The rope Rx4 let out from the drum 4 is passed around the lower sheave Sax4 and the upper sheave Sbx4, and its end is connected to the tilting mechanism J2.

As illustrated in FIG. 6, the four upper sheaves Sb (Sb1, Sb2, Sb3, Sb4) are installed on the trolley 3 with their axial directions aligned in the short side direction x. The four upper sheaves Sb are installed at intervals in the long side direction y and the short side direction x. For example, upper sheaves Sb are installed near both ends of the trolley 3 in the long side direction y and near both ends of the trolley 3 in the short side direction x when viewed from above.

A rope R1 let out from one of the drums 4 and stretched along the long side direction y is passed around the lower sheave Sa1 and the upper sheave Sb1, and its end portion is connected to the tilting mechanism J3. The rope R3 let out from the other drum 4 is passed around the lower sheave Sa3 and the upper sheave Sb3, and its end is connected to the tilting mechanism J3.

Similarly to the above, the rope R2 let out from one of the drums 4 is passed around the lower sheave Sa2 and the upper sheave Sb2, and its end is connected to the tilting mechanism J4. The rope R4 let out from the other drum 4 is passed around the lower sheave Sa4 and the upper sheave Sb4, and its end is connected to the tilting mechanism J4.

As illustrated in FIG. 7, the rope R1 let out from one drum 4 has a first portion 6 extending from the drum 4 installed on the trolley 3 to the lower sheave Sa1, and a second portion 7 extending from the lower sheave Sa1 to the upper sheave Sb1. It has

As illustrated in FIG. 7, when viewed in the short side direction x, the first portion 6 is approximately parallel to the vertical direction z. Hereinafter, the state of the rope R stretched substantially vertically like this first portion 6 may be referred to as a vertical state. The second portion 7 is in a state of being inclined with respect to the first portion 6. Hereinafter, the state of the rope R that is stretched in any direction with respect to the vertical direction z like the second portion 7 may be referred to as a tilted state. In this specification, the vertical state includes a state where the rope R is slightly inclined, for example, by ±5 degrees with respect to the vertical direction z. The tilted state includes not only a state in which the rope R is tilted by, for example, ±45 degrees with respect to the vertical direction z, but also a state in which the rope R is tilted more than the vertical state of the rope R. For example, when the inclination of the rope R in the vertical state is ±0 degrees, the inclination of the rope R in the inclined state can be, for example, within the range of ±3 degrees.

As illustrated in FIG. 7, in the rope R1 and the rope R3, a horizontal force corresponding to the tension is generated from the respective second portions 7 which are in an inclined state. Since this force is generated in directions that cancel each other out along the long side direction y, swinging of the hanging tool 1 in the long side direction y can be suppressed.

As illustrated in FIG. 8, when viewed in the long side direction y, the second portion 7 is substantially parallel to the vertical direction z, and is in a vertical state. The first portion 6 is in an inclined state with respect to the second portion 7. A horizontal force corresponding to the tension is generated from the first portion 6 which is in an inclined state. Since this force is generated in directions that cancel each other out along the short side direction x, swinging of the hanging tool 1 in the short side direction x can be suppressed.

In addition to the ropes Rx1-Rx4 stretched along the short side direction x (see Figure 5), the ropes R1-R4 stretched along the long side direction y (see Figure 8) also You can obtain a steadying effect. This is advantageous in improving the steadying effect in the short side direction x.

The plane defined by the first part 6 and the second part 7 constitutes a triangular truss structure. This triangle is formed by the respective ropes R1-R4, which are congruent with each other. The four congruent triangles generate forces that cancel each other out in the horizontal direction, which is advantageous for improving the stabilization effect of the hanging tool 1.

The lower sheaves Sa1-Sa4 are installed on the hanger 1 so that their axial directions are horizontal and are inclined with respect to both the short side direction x and the long side direction y. By employing the hanging tool 1, the triangular surfaces forming the truss structure are not parallel to either the short side direction x or the long side direction y. Therefore, the anti-vibration effect can be exhibited in both the short side direction x and the long side direction y.

The rope R may be replaced due to deterioration over time. Since the ropes R1 to R4 have the same length when the hanging tool 1 is horizontal, the tension can be easily adjusted after rope replacement. This is advantageous in improving the workability of rope replacement work.

When the tilt mechanism J can independently control the tension of the rope R connected to both ends, shift control, trim control, and skew control of the hanging tool 1 can be performed.

As illustrated in FIG. 6, for example, when the tilting mechanism J is composed of an electric jack that can independently control the amount of expansion and contraction at both ends, the tilting mechanisms J3 and J4 are extended in the same direction in the long side direction y. Then, the hanging tool 1 shifts in the direction of the extension. In FIG. 7, when the right side of the tilting mechanisms J3 and J4 is extended, the hanging tool 1 moves in parallel to the right, and when the left side of the tilting mechanisms J3 and J4 is extended, the hanging tool 1 moves to the left. Move in parallel. This shift control is not limited to the above, but if a tension difference is created between the rope R1 and the rope R3, and between the rope R2 and the rope R4, the hanging tool 1 is shifted in a direction where the tension is relatively small. .

In FIG. 4, when all four tilting mechanisms J are extended in the same direction, the tension of the rope R on the extended side is reduced and the hanging tool 1 is lowered. Of both ends of the hanger 1 in the long side direction y, the end on the side where the tilting mechanism J is extended is lowered. Trim control that controls the inclination of the hanger 1 with the short side direction x as the central axis becomes possible.

In the case of a configuration in which the rotation direction and rotation speed of the two drums 4 are independently controlled, trim control can be performed by adjusting the tension of the rope R using the drums 4. If the configuration is such that only trim control can be performed, the tilting mechanism J may not be provided.

In FIG. 5, when the tilting mechanisms J1 and J2 are extended in mutually opposite directions, the hanging tool 1 moves to the extended side in the short side direction x. Since the pair of short sides move in opposite directions, it is possible to perform skew control to control the rotation of the hanger 1 with the vertical direction z as the central axis.

It is desirable that the crane 2 be configured to perform all of shift control, trim control, and skew control. However, depending on the type of crane 2 and the content of cargo handling work, the crane 2 may be configured to be able to perform at least one of shift control, trim control, and skew control. Further, if there is no need to perform any of the controls, the crane 2 may be provided without the tilting mechanism J.

Since the lower sheave Sa is arranged inside the four corners of the hanging tool 1, the resistance to rotation of the hanging tool 1 about the vertical direction z can be reduced. Since the rope R is less likely to resist the skew control of the hanging tool 1, it becomes easier to obtain the effect of skew control.

As illustrated in FIG. 9, the lower sheave Sa may be installed on a support stand 8 that tilts along the axial direction of the lower sheave Sa. In this embodiment, the support stand 8 supports the lower sheave Sa so as to be tiltable only in one direction (rightward in FIG. 9). In FIG. 9, the tilting direction of the lower sheave Sa is indicated by an arrow for explanation. Similarly, in FIG. 3, the direction of tilting of the lower sheave Sa is indicated by an arrow. The support stand 8 can tilt the lower sheave Sa in the range of, for example, 0 degrees to 10 degrees with respect to the vertical direction z. As illustrated in FIG. 3, the lower sheaves Sa arranged at intervals in the short side direction x tilt in a direction toward each other. The lower sheave Sa is passively tilted by the tension of the rope R that is wrapped around it.

As illustrated in FIG. 7, the position where the rope R1 is let out from the drum 4 moves in the axial direction of the drum 4 depending on the amount of the rope R1 let out. Therefore, the first portion 6 of the rope R1 is inclined along the long side direction y. Since the lower sheave Sa1 is tilted accordingly, it becomes easier to avoid a problem in which the angle of the rope R1 with respect to the lower sheave Sa exceeds the range of the fleet angle. Since the rope R can be stretched directly from the drum 4 to the lower sheave Sa, the number of sheaves can be reduced. This is advantageous in reducing the manufacturing cost of the crane 2.

The smaller the diameter of the drum 4, the easier the position at which the rope R is let out from the drum 4 moves in the axial direction of the drum 4. Since the lower sheave Sa can be tilted in accordance with the movement of the rope R, it is also possible to make the diameter of the drum 4 relatively small. Since the reduction ratio of the drum 4 can be made small, it is advantageous for reducing the size of the reduction gear 5.

In the present invention, the support stand 8 is not an essential component. If the diameter of the drum 4 is made relatively large, the amount of movement of the rope R in the axial direction of the drum 4 will be reduced, so a lower sheave Sa that does not tilt can be used. Furthermore, by installing a sheave on the trolley 3 and passing the rope R around the lower sheave Sa via this sheave, the lower sheave Sa is not affected by the movement of the rope R in the axial direction of the drum 4. It can be done. In this case as well, the lower sheave Sa that does not tilt can be used.

The lower sheave Sa illustrated in FIG. 9 has a configuration in which it tilts only to the right in FIG. 9 and does not tilt to the left from an upright state in which the axial direction is substantially horizontal. Since the lower sheave Sa is configured to tilt only in one direction, it becomes easier to suppress problems such as the lower sheave Sa tilting in the other direction and amplifying vibrations when vibration occurs in the hanging tool 1. The present invention does not exclude a configuration in which the lower sheave Sa is tilted to both sides in the axial direction.

As illustrated in FIG. 10, each lower sheave Sa may be installed in a state in which the axial directions of the lower sheaves Sa shown by dashed lines intersect inside the rectangle shown by broken lines. In other words, the axial directions of adjacent lower sheaves Sa may intersect inside the quadrangle formed by the four lower sheaves Sa.

When installing the hoist 1 on the crane 2 as illustrated in FIGS. 11 and 12, after hanging from the lower sheave Sa1 to the upper sheave Sb1, another upper sheave Sb1 whose axial direction is the vertical direction z is installed. ', and the rope R1 is stretched around the tilting mechanism J3.

As illustrated in FIG. 12, all or part of the pair of second portions 7 are arranged between the pair of first portions 6 in the long side direction y. The ropes R1 to R4 stretched along the long side direction y are stretched close to the center of the hanging tool 1 in plan view. Since the rope R is less likely to resist the skew control by the tilting mechanism J, it becomes easier to obtain the effect of skew control.

For example, when the driver's cab is installed near the trolley 3 of a gate-type crane, the embodiment illustrated in FIG. It becomes easier. Therefore, in the case of a crane 2 in which a driver's seat is installed near the trolley 3, the embodiment illustrated in FIG. 7 is more preferable than the embodiment illustrated in FIG. 12. Furthermore, the embodiment illustrated in FIG. 7 can reduce the number of sheaves S, which is advantageous in reducing the manufacturing cost of the crane 2.

The first portion 6 is not limited to the configuration extending from the drum 4 to the lower sheave Sa. The first portion 6 may be formed by a portion that is let out from the drum 4, is wrapped around the upper sheave Sb, and extends from the upper sheave Sb to the lower sheave Sa. In other words, the first portion 6 may be any portion of the rope R extending from the trolley 3 toward the lower sheave Sa. The upper end of the first portion 6 may extend to either the drum 4 or the upper sheave Sb.

1 Hanging tool 2 Crane 3 Trolley 4 Drum 5 Reducer 6 First part 7 Second part 8 Support base x Short side direction y Long side direction z Vertical direction Sa Lower sheave Sax, Sax1-4 Lower sheave (short side direction)
Sa1-4 Lower sheave (long side direction)
R Rope Rx1-4 Short side direction rope R1-4 Long side direction rope Sb Upper sheave Sb1-4, Sb1'-Sb4' Upper sheave (long side direction)
Sbx, Sbx1-4 Upper sheave (short side direction)
J, J1-4 Tilt mechanism

Claims (3)

In a hanging device that is formed into a substantially rectangular shape having a pair of long sides and a pair of short sides in plan view and is equipped with at least four lower sheaves,
A lower sheave Sax1 and a lower sheave Sax2 whose axial directions are parallel to the long side direction in which the long sides extend, and which are installed on one end side of the hanging tool in the long side direction, and a lower sheave Sax2 that is installed on the other end side of the hanging tool in the long side direction. A lower sheave Sax3 and a lower sheave Sax4 are installed;
A lower sheave Sa1 and a lower sheave whose axial direction is between the short side direction, which is the extension direction of the short side, and the long side direction when viewed from above, and which are arranged inside the four corners of the hanging tool when viewed from above. Sa2, a lower sheave Sa3 and a lower sheave Sa4,
a support stand installed on the hanging tool and supporting the lower sheave Sa1, the lower sheave Sa2, the lower sheave Sa3, and the lower sheave Sa4, respectively;
The support base is provided with a structure that supports the lower sheaves Sa1, Sa2, Sa3, and Sa4 in a state that allows the support base to tilt along the axial direction,
The four lower sheaves Sa1, Sa2, Sa3, and Sa4 are arranged at positions corresponding to respective vertices of a substantially rectangular shape formed inside the hanging tool in plan view, and spaced apart in the long side direction. The distance L1 between the axes of the lower sheaves Sa1 and Sa3 is set to 20 to 80% of the length L0 of the long side of the hanging tool,
The axial directions of the lower sheaves Sa1, Sa2, Sa3, and Sa4 that are adjacent to each other in a plan view intersect on the outside of the substantially rectangular shape formed by the four lower sheaves Sa1, Sa2, Sa3, and Sa4 in a plan view. A hanging tool characterized by : In a hanging device that is formed into a substantially rectangular shape having a pair of long sides and a pair of short sides in plan view and is equipped with at least four lower sheaves,
A lower sheave Sax1 and a lower sheave Sax2 whose axial directions are parallel to the long side direction in which the long sides extend, and which are installed on one end side of the hanging tool in the long side direction, and a lower sheave Sax2 that is installed on the other end side of the hanging tool in the long side direction. A lower sheave Sax3 and a lower sheave Sax4 are installed;
A lower sheave Sa1 and a lower sheave whose axial direction is between the short side direction, which is the extension direction of the short side, and the long side direction when viewed from above, and which are arranged inside the four corners of the hanging tool when viewed from above. Sa2, a lower sheave Sa3 and a lower sheave Sa4,
a support stand installed on the hanging tool and supporting the lower sheave Sa1, the lower sheave Sa2, the lower sheave Sa3, and the lower sheave Sa4, respectively;
The support base is provided with a structure that supports the lower sheaves Sa1, Sa2, Sa3, and Sa4 in a state that allows the support base to tilt along the axial direction,
The lower sheaves Sa1, Sa2, Sa3, and Sa4 are supported from an upright state in which the axial directions of the lower sheaves Sa1, Sa2, Sa3, and Sa4 are substantially horizontal to a state in which they can be tilted only in one direction in the axial direction. A hanging tool , characterized in that the support base has the following structure. The support stand that supports the lower sheave Sa1 and the support stand that supports the lower sheave Sa2 are arranged in a direction in which the lower sheave Sa1 and the lower sheave Sa2, which are spaced apart in the short side direction, approach each other. It has a structure that allows it to tilt,
The support stand that supports the lower sheave Sa3 and the support stand that supports the lower sheave Sa4 are arranged in a direction in which the lower sheave Sa3 and the lower sheave Sa4, which are spaced apart in the short side direction, approach each other. The hanging tool according to claim 2, which has a structure that allows the hanging tool to be tilted.

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