JP6983965B1 - Hanging jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a versatile hanging jig capable of securing a hanging allowance. A hanging jig according to an embodiment includes a base, a first adjusting feed screw, a lifting metal fitting, a second adjusting feed screw, a third adjusting feed screw, a first fixing metal fitting, and a second fixing metal fitting. The first adjusting feed screw is rotatably provided on the base. The lifting metal fitting is screwed into the first adjusting feed screw and moves horizontally along the first adjusting feed screw, and the lifting device is attached. The second adjustment lead screw is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the first adjustment lead screw. The third adjustment lead screw is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the second adjustment lead screw. The first fixing bracket and the second fixing bracket move horizontally along the second adjusting feed screw or the third adjusting feed screw, and the object to be lifted is attached. [Selection diagram] Fig. 1

Description

The present invention relates to a hanging jig.

In equipment work at substations, there is work to disassemble and connect the equipment on the flange surface when installing or remodeling the equipment in the pipe body. In particular, when joining flange surfaces, it is necessary to lift the equipment horizontally so that the flanges are parallel to each other in order to prevent damage to the flange surfaces and to ensure proper adhesion.

At sites such as underground substations and indoor substations, when hoisting equipment, the chain blocks are placed by hooking the upper hooks of each chain block on a plurality of hooks installed on the ceiling. Wrap multiple nylon slings around the lifting device, sling them, and bundle the faucets at the ends of the nylon slings with a shackle. Join those shackles to the ring. Hook the lower hook of the chain block to the ring and adjust the length of the luggage lifting chain with the operation chain to ensure the levelness of the equipment. Operate these multiple chain blocks, lift the equipment while keeping it horizontal, move it sequentially, move it to the desired location, and connect the equipment.

However, in the remodeling work at underground substations and indoor substations, the air conditioning ducts and the like constructed after the equipment construction interfere with the construction site, and the space of the construction site is very dense from the initial assembly. Therefore, it is difficult to secure the suspension allowance from the ring, which is the suspension point, to the ceiling. When the suspension allowance from the device to the ceiling is shortened, the angle of the cargo lifting chain widens when the device is held sideways, resulting in a so-called fighting state, and the tension applied to the cargo lifting chain increases. As a result, the cargo lifting chain may break.

In order to secure the suspension allowance, a suspension jig may be manufactured according to the equipment to be lifted. However, since it is necessary to lift various devices having different sizes and positions of the center of gravity, it is necessary to manufacture a dedicated hanging jig for each device. If a plurality of types of hanging jigs are manufactured, there is a problem that the manufacturing cost of the hanging jigs increases.

Japanese Unexamined Patent Publication No. 2012-246123

An object of the present invention is to provide a versatile hanging jig that can secure a hanging allowance.

In order to solve the above problems, the hanging jig according to the embodiment includes a base, a first adjusting feed screw, a lifting bracket, a second adjusting feed screw, a third adjusting feed screw, a first fixing bracket, and a second fixing bracket. Have. The first adjusting feed screw is rotatably provided on the base. The lifting metal fitting has a screw portion that is screwed into the first adjustment feed screw and moves horizontally along the first adjustment feed screw, and a mounting portion to which the lifting device is mounted. The second adjustment lead screw is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the first adjustment lead screw. The third adjustment lead screw is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the second adjustment lead screw. The first fixing bracket has a second screwed portion that is screwed into the second adjusting feed screw and moves horizontally along the second adjusting feed screw, and a second mounting portion to which the object to be lifted is attached. .. The second fixing bracket has a second screwed portion that is screwed into the third adjusting feed screw and moves horizontally along the third adjusting feed screw, and a second mounting portion to which the object to be lifted is attached. ..

It is a block diagram of the suspension jig which concerns on embodiment. It is a top view of the hanging jig which concerns on embodiment. It is a perspective view of the lifting metal fitting of the hanging jig which concerns on embodiment. It is a perspective view of the fixing metal fitting of the hanging jig which concerns on embodiment. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a BB sectional view of FIG. It is a figure for demonstrating an example of lifting an apparatus using the lifting jig which concerns on embodiment. It is a figure for demonstrating an example of lifting a conventional device. It is a block diagram of the suspension jig which concerns on modification 1. FIG. It is a block diagram of the drive unit which concerns on modification 1. FIG.

Hereinafter, this embodiment will be described with reference to the drawings. For the explanation, an XYZ coordinate system including X-axis, Y-axis, and Z-axis which are orthogonal to each other is appropriately used. In this embodiment, a case where a device having a flange surface is lifted and connected to an existing device having a flange surface will be described.

FIG. 1 is a configuration diagram of a hanging jig 1 according to an embodiment. FIG. 2 is a plan view of the hanging jig 1. The hanging jig 1 includes a first adjustment bolt 10 (first adjustment feed screw), a second adjustment bolt 30 (second adjustment feed screw), a third adjustment bolt 31 (third adjustment feed screw), a lifting metal fitting 20, and fixing. It has a metal fitting 40 (first fixing metal fitting, second fixing metal fitting) and a casing 50. The hanging jig 1 is fixed to the device 120 to be lifted by the fixing metal fitting 40.

The first adjusting bolt 10 is a member having a thread in the first direction (X-axis direction) in the longitudinal direction. The first adjusting bolt 10 is a hexagon bolt. The first adjusting bolt 10 is rotatably provided on the casing 50.

The second adjusting bolt 30 is rotatably provided on the casing 50, is arranged below the first adjusting bolt 10, and is arranged in parallel with the first adjusting bolt 10. The third adjusting bolt 31 is rotatably provided on the casing 50, is arranged below the first adjusting bolt 10, and is arranged in parallel with the second adjusting bolt 30. The second adjusting bolt 30 and the third adjusting bolt 31 are members having a thread in the first direction (X-axis direction) in the longitudinal direction. The second adjusting bolt 30 and the third adjusting bolt 31 are hexagon bolts. The second adjusting bolt 30 and the third adjusting bolt 31 are arranged coaxially.

As shown in FIG. 3, the lifting metal fitting 20 has a screw portion 21, a mounting portion 22, and a wheel 23. The lifting metal fitting 20 moves in the horizontal direction (X-axis direction) along the first adjusting bolt 10 with the rotation of the first adjusting bolt 10.

The mounting portion 22 is a member for mounting a lifting device such as a chain block. The mounting portion 22 is formed of a substantially triangular iron plate. The mounting portion 22 has an opening 221 for connecting a chain or the like of the lifting device.

The screw portion 21 is made of a rectangular parallelepiped steel material and has a through hole 211 penetrating in the X-axis direction. A screw groove screwed into the first adjusting bolt 10 is formed on the inner peripheral surface of the through hole 211. The two screwed portions 21 are connected to both ends (+ X side and −X side) on the −Z side of the mounting portion 22 so that the respective through holes 211 are located coaxially. The screwed portion 21 is screwed into the first adjusting bolt 10 and moves in the horizontal direction (X-axis direction) along the first adjusting bolt 10 as the first adjusting bolt 10 rotates.

The wheel 23 comes into contact with the inner surface of the casing 50 and rotates as the lifting metal fitting 20 moves. The wheel 23 is a member for reducing the contact resistance between the lifting metal fitting 20 and the casing 50 when the lifting metal fitting 20 moves in the X-axis direction. The wheel 23 is attached to a rotation shaft (not shown) of the screw portion 21 and is arranged on the + Y side surface and the −Y side surface of the screw portion 21. The wheels 23 are made of iron and a hard resin.

As shown in FIG. 4, the fixing bracket 40 has a second screw portion 41, a second mounting portion 42, a leg portion 43, and a wheel 45. The second screwed portion 41 has the same configuration as the screwed portion 21. The second screwed portion 41 is made of a rectangular parallelepiped steel material and has a through hole 411 penetrating in the X-axis direction. On the inner peripheral surface of the through hole 411, a screw groove screwed into the second adjusting bolt 30 or the third adjusting bolt 31 is formed. The two second screwed portions 41 are arranged coaxially. The second screw portion 41 is screwed into the second adjustment bolt 30 or the third adjustment bolt 31, and the second adjustment bolt 30 or the third adjustment bolt is rotated with the rotation of the second adjustment bolt 30 or the third adjustment bolt 31. It moves in the horizontal direction (X-axis direction) along 31. As a result, the fixing bracket 40 moves in the horizontal direction (X-axis direction) along the second adjusting bolt 30 or the third adjusting bolt 31 with the rotation of the second adjusting bolt 30 or the third adjusting bolt 31.

The second mounting portion 42 is a member formed of an iron plate. The second mounting portion 42 has a hole 421 through which a bolt is passed. The leg portion 43 is a steel material for connecting the second screwed portion 41 and the second mounting portion 42. The leg portion 43 is connected in the −Z direction from the −Z side end of each of the two second screwed portions 41. A second mounting portion 42 is connected to the −Z side of the leg portion 43.

The wheel 45 comes into contact with the inner surface of the casing 50 and rotates as the fixing bracket 40 moves. The wheel 45 is a member for reducing the contact resistance between the fixing bracket 40 and the casing 50 when the fixing bracket 40 moves in the X-axis direction. The wheel 45 is attached to a rotation shaft (not shown) of the second screwed portion 41, and is arranged on the + Y side surface and the −Y side surface of the second screwed portion 41. The wheels 45 are made of iron and a hard resin.

Returning to FIG. 1, the casing 50 is a member that accommodates the first adjusting bolt 10, the second adjusting bolt 30, the third adjusting bolt 31, the lifting metal fitting 20, and the fixing metal fitting 40. The casing 50 has openings (not shown) through which the first adjusting bolt 10 is passed through the + X side surface and the −X side surface.

Further, the casing 50 has an opening (not shown) through which the second adjusting bolt 30 is passed on the surface on the −X side. The casing 50 has a bearing member 55 that supports an end portion of the second adjusting bolt 30 on the + X side. The second adjusting bolt 30 is rotatably incorporated into the casing 50 by the opening provided in the casing 50 and the bearing member 55. Further, the casing 50 has an opening (not shown) through which the third adjusting bolt 31 penetrates on the surface on the + X side. The casing 50 has a bearing member 55 that supports an end portion of the third adjusting bolt 31 on the −X side. The third adjusting bolt 31 is rotatably incorporated into the casing 50 by the opening provided in the casing 50 and the bearing member 55.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a cross-sectional view taken along the line BB of FIG. As shown in FIGS. 5 and 6, the casing 50 has an opening 51 on the surface on the + Z side in which the mounting portion 22 of the lifting metal fitting 20 can move in the X-axis direction. Further, the casing 50 has an opening 52 on the surface on the −Z side in which the leg portion 43 of the fixing bracket 40 can move in the X-axis direction.

Next, an example of using the hanging jig 1 will be described with reference to FIG. 7. Here, a case where the flange surface 121 of the device 120 to be added is connected to the flange surface 111 of the existing device 110 will be described. The flange surface 111 and the flange surface 121 are provided with a plurality of holes through which bolts pass, and the flange surface 111 and the flange surface 121 are fastened with bolts. In order to fasten the flange surface 111 and the flange surface 121 with bolts, it is necessary to lift the equipment 120 to be added so that the flange surface 111 and the flange surface 121 are horizontal.

First, the two fixing brackets 40 of the hanging jig 1 are fixed to the flange surface 122 of the device 120. At this time, the second adjusting bolt 30 and the third adjusting bolt 31 of the hanging jig 1 are adjusted so that the holes 421 of the two fixing brackets 40 match the bolt holes of the flange surface 122. Specifically, by attaching a crank handle to the ends of the second adjusting bolt 30 and the third adjusting bolt 31 and rotating the second adjusting bolt 30 and the third adjusting bolt 31, the X of the two fixing brackets 40 Adjust the axial position. The fixing bracket 40 attached to the second adjusting bolt 30 slides in the axial direction (X-axis direction) of the second adjusting bolt 30 as the second adjusting bolt 30 rotates. When the second adjusting bolt 30 is rotated in the reverse direction with the crank handle, the fixing bracket 40 slides in the opposite direction. The fixing bracket 40 attached to the third adjusting bolt 31 slides in the axial direction (X-axis direction) of the third adjusting bolt 31 as the third adjusting bolt 31 rotates. Then, the two fixing brackets 40 are fixed to the flange surface 122 with bolts. The fixing bracket 40 screwed into the second adjusting bolt 30 and the fixing bracket 40 screwed into the third adjusting bolt 31 slide independently. Therefore, the hanging jig 1 can be fixed to devices having different sizes.

The position of the center of gravity of the device 120 to be added may be deviated from the center of the flange surface 122. The position of the center of gravity of the device 120 is calculated in advance, and the lifting metal fitting 20 is moved to the calculated position of the center of gravity of the device 120. Specifically, a crank handle is attached to the end of the first adjusting bolt 10, and the first adjusting bolt 10 is rotated to align the position of the lifting metal fitting 20 in the X-axis direction with the calculated center of gravity of the device 120.

As shown in FIG. 7, a ceiling hook 135 is provided at a predetermined position on the ceiling C. A chain block 140 is attached to each of the ceiling hooks 135. A lower hook 142 is attached to the tip of the luggage lifting chain 141 of the chain block 140. Next, the ring 130 is attached to the lifting metal fitting 20 via the shackle 131. Then, the lower hook 142 of the chain block 140 is connected to the ring 130, and the device 120 is lifted. There is a slight discrepancy between the calculated center of gravity position and the actual center of gravity position. Therefore, it is confirmed whether the flange surface 122 of the device 120 is perpendicular to the ground. When the flange surface 122 of the device 120 is not perpendicular to the ground, fine adjustment is performed by rotating the first adjustment bolt 10 with the device 120 lifted.

Since the device 120 is being lifted, a large load is applied between the lifting metal fitting 20 and the casing 50. However, since the lifting metal fitting 20 has wheels 23, the contact resistance between the lifting metal fitting 20 and the casing 50 is small. Therefore, the first adjusting bolt 10 can be rotated while the device 120 is lifted, and the lifting metal fitting 20 can be moved along the X-axis direction.

The operation chain 143 is operated to move the device 120 so that the flange surface 121 of the device 120 is kept perpendicular to the ground and the flange surface of the device 120 overlaps the flange surface 111 of the device 110. Then, the flange surface 121 of the device 120 is bolted to the flange surface 111 of the device 110.

As shown in FIG. 7, the ring 130 and the hanging jig 1 are connected via the shackle 131 without slinging various parts of the device 120 with a nylon sling. Therefore, the distance L2 from the flange surface 122 of the device 120 to the slinging position (position of the ring 130) is short. Therefore, by using the hanging jig 1, the hanging allowance L1 from the slinging position to the ceiling can be lengthened. As a result, the angle θ formed by the luggage lifting chains 141 of the two chain blocks 140 can be reduced, and the tension applied to the luggage lifting chains 141 can be reduced.

In the conventional method of lifting equipment, as shown in FIG. 8, nylon slings 132 are sled at various places of the equipment 120 to be added, and the nylon slings 132 are bundled by the ring 130 via the shackle 131. Then, the length of the nylon sling 132 is adjusted by turning it too much to make the device 120 horizontal.

Further, in the conventional method of lifting the device, since various parts of the device 120 are sled by the nylon sling 132 and bundled by the ring 130, the vertical distance L2 between the device 120 and the ring 130 becomes long. Therefore, the suspension allowance L1 from the sling position (position of the ring 130) to the ceiling is shortened. When the suspension allowance L1 becomes short, the angle θ formed by the luggage lifting chains 141 of the two chain blocks 140 increases, and the tension applied to the luggage lifting chains 141 increases. As a result, the luggage lifting chain 141 is easily broken.

As described above, since the suspension jig 1 can independently move each of the two fixing brackets 40 in the X-axis direction, the suspension jig 1 is applicable to lifting equipment of different sizes. can. Therefore, it is not necessary to manufacture a dedicated hanging jig for each device, and the manufacturing cost of the hanging jig can be reduced.

Further, the lifting jig 1 can move the lifting metal fitting 20 in the X-axis direction. As a result, it can be applied to lifting devices having different positions of the center of gravity. In addition, since the horizontal adjustment can be performed while the device is lifted, the installation time of the device can be shortened.

Further, since the lifting metal fitting 20 and the fixing metal fitting 40 have the wheels 45, the contact resistance between the lifting metal fitting 20 and the fixing metal fitting 40 and the casing 50 can be reduced. As a result, the lifting metal fitting 20 can be easily moved while the heavy device is suspended, and the time for adjusting the center of gravity can be shortened.

Further, as shown in FIG. 7, by using the suspension jig 1, a nylon sling for horizontally suspending the object to be lifted becomes unnecessary, so that a long suspension allowance L1 can be secured. As a result, it is possible to prevent the load-lifting chain 141 of the chain block 140 from breaking.

In the above description, the case where the lifting metal fitting 20 has two screwed portions 21 has been described. However, the number of screwed portions 21 is not limited. For example, the number of screwed portions 21 may be one or three. The total length of the screwed portion 21 in the X-axis direction is determined in consideration of the strength of the lifting metal fitting 20, the shaking when the device 120 is lifted, and the like. Further, in the above description, the case where the fixing bracket 40 has two second screwed portions 41 has been described. However, the number of second screwed portions 41 is not limited. The number of the second screwed portions 41 may be one or three. The total length of the second screwed portion 41 in the X-axis direction is determined in consideration of the strength of the fixing bracket 40 and the like.

Further, in the above description, the case where the hanging jig 1 has the first adjusting bolt 10, the second adjusting bolt 30, the third adjusting bolt 31, the lifting metal fitting 20, and the casing 50 for accommodating the fixing metal fitting 40 has been described. The hanging jig 1 does not necessarily have to have the first adjusting bolt 10, the second adjusting bolt 30, the third adjusting bolt 31, the lifting metal fitting 20, and the casing 50 for accommodating the fixing metal fitting 40. For example, the hanging jig 1 may have a base for supporting the first adjusting bolt 10, the second adjusting bolt 30, and the third adjusting bolt 31 instead of the casing 50. For example, in FIGS. 1 and 2, the base does not have a surface on the + Z side and a surface on the −Z side.

(Modification 1)
In the above description, the case where the first adjusting bolt 10 is manually rotated by using the crank handle has been described. In the first modification, a case where the first adjusting bolt 10 is rotationally driven by using the drive unit 70 will be described. As shown in FIG. 9, the suspension jig 1 according to the modified example 1 has a drive unit 70 at the end of the first adjusting bolt 10.

FIG. 10 is a configuration diagram of the drive unit 70. The drive unit 70 includes a tilt sensor 71, a control device 72, a power supply device 73, an electric motor 74, and a drive unit 75. The tilt sensor 71 is a device that measures the tilt with respect to the ground. The tilt sensor 71 may be mounted inside the drive unit 70, attached to the first adjusting bolt 10, or attached to the device 120 to be lifted.

The control device 72 is a computer having a CPU, RAM, ROM, and the like. The control program is stored in the ROM. The control device 72 controls the power supply device 73 and the electric motor 74 so that the tilt value measured by the tilt sensor 71 becomes 0 degrees with respect to the ground based on the control program and the output of the tilt sensor 71. ..

The power supply unit 73 is a power source for the electric motor 74. The power supply unit 73 inverts the voltage polarity of the output of the power supply unit 73 applied to the electric motor 74 based on the control by the control device 72. The electric motor 74 rotates under the control of the control device 72. The rotating shaft of the electric motor 74 is connected to the drive unit 75. The drive unit 75 is a member that transmits the rotation of the electric motor 74 to the first adjusting bolt 10. The drive unit 75 rotationally drives the first adjustment bolt 10 as the electric motor 74 rotates.

Next, the operation of the hanging jig 1 according to the modified example 1 will be described. The operator operates the drive unit 70 in a state where the device 120 is lifted by the hanging jig 1. The tilt sensor 71 measures the tilt of the device 120 with respect to the ground. The tilt sensor 71 outputs the measurement result to the control device 72.

When the position of the lifting metal fitting 20 shown in FIG. 9 is located on the −X side of the position of the center of gravity of the device 120, the control device 72 rotates the first adjusting bolt 10 via the drive unit 75, and the lifting metal fitting 20 is moved. The power supply device 73 and the electric motor 74 are controlled so as to move to the + X side. When the position of the lifting metal fitting 20 is located on the + X side of the center of gravity of the device 120, the control device 72 reverses the voltage polarity of the output of the power supply device 73 applied to the electric motor 74, and the lifting metal fitting 20 is on the −X side. The electric motor 74 is controlled so as to move to. By such control of the control device 72, the flange surface 121 of the device 120 shown in FIG. 7 becomes horizontal with respect to the flange surface 111 of the existing device 110.

In the above description, the voltage polarity of the output of the power supply device 73 applied to the electric motor 74 by the control device 72 is reversed to control the rotation direction of the first adjustment bolt 10, that is, the movement direction of the lifting metal fitting 20. I explained. As a method of controlling the rotation direction of the first adjustment bolt 10, the drive unit 75 may be provided with a mechanism for reversing the rotation direction of the first adjustment bolt 10.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Suspension jig 10 ... 1st adjustment bolt (1st adjustment feed screw)
20 ... Lifting metal fittings 21 ... Screwing part 22 ... Mounting part 23 ... Wheels 221 ... Opening 30 ... Second adjustment bolt (second adjustment feed screw)
31 ... 3rd adjustment bolt (3rd adjustment feed screw)
40 ... Fixing bracket 41 ... Second screwed part 42 ... Second mounting part 421 ... Hole 43 ... Leg 45 ... Wheel 50 ... Casing 51, 52 ... Opening 55 ... Bearing member 70 ... Drive unit 71 ... Tilt sensor 72 ... Control device 73 ... Power supply device 74 ... Electric motor 75 ... Drive unit 110 ... Existing equipment 120 ... Equipment to be added 111, 121, 122 ... Flange surface 130 ... Ring 131 ... Shackle 132 ... Nylon sling 135 ... Ceiling hook 140 ... Chain block 141 ... Luggage lifting chain 142 ... Lower hook 143 ... Operation chain

Claims (6)

With the base
The first adjustment lead screw rotatably provided on the base and
A lifting metal fitting that has a screwing portion to be screwed into the first adjusting feed screw and a mounting portion to which a lifting device is attached, and moves along the first adjusting feed screw with the rotation of the first adjusting feed screw. When,
A second adjustment lead screw that is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the first adjustment lead screw.
A third adjustment lead screw that is rotatably provided on the base, is arranged below the first adjustment lead screw, and is arranged in parallel with the second adjustment lead screw.
A first fixing bracket having a second mounting portion to which a lifting object is mounted and moving along the second adjusting feed screw as the second adjusting feed screw rotates.
A second fixing bracket having the second mounting portion to which the lifting object is mounted and moving along the third adjusting feed screw with the rotation of the third adjusting feed screw.
Hanging jig with. The base is a casing that houses the first adjustment feed screw, the second adjustment feed screw, the third adjustment feed screw, the lifting bracket, the first fixing bracket, and the second fixing bracket.
The lifting metal fitting has a wheel that comes into contact with the inner surface of the casing and rotates with the movement of the lifting metal fitting.
The lifting metal fitting moves in the axial direction of the first adjusting feed screw with the rotation of the first adjusting feed screw.
The hanging jig according to claim 1. The first fixing bracket and the second fixing bracket have wheels that abut on the inner surface of the casing and rotate with the movement of the first fixing bracket and the second fixing bracket.
The first fixing bracket moves in the axial direction of the second adjusting feed screw with the rotation of the second adjusting feed screw.
The second fixing bracket moves in the axial direction of the third adjusting feed screw with the rotation of the third adjusting feed screw.
The hanging jig according to claim 2. The first adjusting feed screw, the second adjusting feed screw, and the third adjusting feed screw are bolts.
The hanging jig according to any one of claims 1 to 3. It has an inclination sensor that measures the inclination of the object to be lifted with respect to the ground.
The hanging jig according to any one of claims 1 to 4. It has a drive unit that rotationally drives the first adjusting feed screw so that the object to be lifted is parallel to the ground based on the output of the tilt sensor.
The hanging jig according to claim 5.

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