JP6910853B2 - Indoor lifting device - Google Patents

Description

The present disclosure relates to an indoor lifting device, and more particularly to an indoor lifting device for which a sufficient lifting allowance for a lifting target device is desired in indoor lifting work.

As an indoor lifting device, a gantry-type lifting device using a chain block, a winch, or the like as the lifting device is known.

Patent Document 1 describes that in a gate-type lifting device for moving a hoisting machine or the like in an elevator machine room, when the hoisting machine or the like is lifted by using a chain block, the hoisting machine or the like is hoisted when the ceiling of the machine room is low. It is pointed out that the lifting allowance of the chain cannot be secured sufficiently. Here, a pair of stanchions, two beam receivers provided on top of each stanchion, and a gantry support that includes a beam erected between the two beam receivers can be manually moved along the beam. A first return wheel is provided in the trolley section, and a second return wheel is provided in the beam receiver on one side. Then, an electric winch is provided on one of the columns having the beam receiver on one side, and the tip of the wire whose base end is wound around the drum of the electric winch passes through the second return wheel and the first return wheel. It has a shackle that hangs down from the trolley and can be connected to a hoist or the like at the tip.

In this structure, the hoisting machine or the like on the floor surface of the machine room is moved to a desired position as follows. Attach a shackle to the hoist, etc., and drive the electric winch in the lifting direction. According to the structure of Patent Document 1, since the shackle is raised to the bottom of the trolley portion, the hoisting machine or the like can be lifted to a higher position than the chain block is suspended on the trolley portion. When it is lifted to an appropriate height, the operation of the electric winch is temporarily stopped. Then, a wire clip and a stopper are used to prevent the wire from backfeeding, and in that state, the trolley portion is manually moved to a desired position on the beam. As a result, it is possible to move to a desired position while keeping the height position of the hoist or the like as it is. When the desired moving position is reached, the trolley portion is fixed to the beam using a fixing bracket. Then, the wire clip and the stopper are removed, the electric winch is reversed, and the hoisting machine or the like is lowered to the floor surface of the machine room.

In Patent Document 2, as a lifting device for moving a hoisting machine or the like in the machine room of an elevator, a pair of legs and a horizontal beam portion arranged between them are assembled in a gate shape to form a pedestal. A configuration is described in which a chain block is attached to the leg portion of the above and two pulleys are provided on the horizontal beam portion. One end of the lifting rope is directly attached to a hoist or the like with a shackle or the like, and the moving direction is changed by about 180 degrees by two pulleys, and the rope is connected to the chain of the chain block. This configuration corresponds to the one in which the chain block is provided on the leg instead of the electric winch provided on the support in Patent Document 1, but since the two pulleys are in the fixed positions, the hoisting machine and the like can be lifted. However, it is considered that the plane movement in the machine room cannot be performed as it is.

Japanese Unexamined Patent Publication No. 2000-103589 Japanese Unexamined Patent Publication No. 2001-151476

In Patent Documents 1 and 2, the lifting work in the machine room of an elevator is generally taken up in the machine room of an elevator where heavy objects such as a hoisting machine and a control panel are arranged, and their replacement or arrangement is changed. This is because an indoor lifting device is required to perform the above. When a gate-type lifting device using a chain block, winch, etc., which has been conventionally known as an indoor lifting device, is installed in the machine room of an elevator, it may be sufficiently lifted in some cases due to restrictions on the ceiling height of the machine room. There is no allowance, and workability such as replacement work of the equipment to be lifted is not good. In general, not only the machine room of an elevator, but also the ceiling height in the room is restricted, and it is often the case that the lifting allowance of the equipment to be lifted is not sufficient.

An object of the present invention is to provide an indoor lifting device that can secure a sufficient lifting allowance and has good workability in indoor lifting work.

The indoor lifting device according to the present disclosure includes a plurality of columns erected upward from the floor surface, a first long side and a second long side supported by the plurality of columns and arranged in parallel with each other. , An upper frame body having a rectangular frame shape composed of a first short side and a second short side arranged in parallel with each other, and one end arranged on the first long side side and the other end on the second long side side. A first axis arranged and parallel to the short side direction, which is the extending direction of the short side, and one end arranged on the first long side side and the other end arranged on the second long side side, and a predetermined parallel separation from the first axis. A second axis arranged at intervals, a first wire pulley that can rotate around the first axis, a second wire pulley that can rotate around the second axis, and a second wire pulley that can rotate around the first short side. A wire return wheel supported by a wire return wheel, a lifting pulley, a suspension upper part having a mounting portion attached to the lifting pulley and lifting a device to be lifted, and a wire hung on the lifting pulley, one end of which is lifted. It extends upward from the heavy pulley, extends parallel to the long side from the first wire hook to the wire return wheel, extends downward from the wire return pulley, and the other end extends upward from the lifting pulley and the second wire. It has a wire that extends parallel to the long side from the pulley toward the second short side and is fixed to the wire fixing portion of the second short side, and a drum that unwinds and winds the wire, and is located on the lower side of the wire return wheel. It is provided with a winch portion held by a support column.

According to the above configuration, instead of attaching the chain block to the upper frame body supported by the support column, a lifting pulley and a winch portion for feeding and winding the wire hung on the lifting pulley are used. A wire fixing portion for fixing the other end of the wire is provided at the height of the upper frame body, and a winch portion is held and provided on a support column for supporting the upper frame body. Then, one end of the wire hung on the lifting pulley extends upward from the lifting pulley, extends from the first wire hook toward the wire return wheel, and extends downward from the wire return wheel to reach the winch portion. The other end of the wire extends upward from the lifting pulley, extends from the second wire hook, and is fixed to the wire fixing portion.

When the winch portion is operated to wind up the wire, the lifting pulley is pulled upward between the first wire hook and the second wire hook, and can be lifted to near the height of the upper frame. .. In the case of a chain block, the lifting height is limited by the size of the assembly that houses the reduction gear, load chain, etc., but according to the above configuration, it is not restricted, so it can be lifted even in a room with a low ceiling. You can take a lot of money.

Further, since the winch portion is provided while being held by the support column, the lifting operation can be performed at a distance from the lifting target device, so that the workability is improved as compared with the operation of the chain block provided directly above the lifting target device. However, work safety is also improved.

In the indoor lifting device according to the present disclosure, one end of each of the first axis and the second axis is attached to one end moving table, the other end is attached to the other end moving table, and one end moving table and the other end are attached. It is preferable that the moving table can be moved in the long side direction by being guided by the first long side and the second long side, respectively.

According to the above configuration, the first shaft on which the first wire hook is rotatably provided and the second shaft on which the second wire hook is rotatably provided are long while maintaining a predetermined parallel separation distance. It can be moved in the side direction. Here, when the winch portion stops operating, the vertical movement of the suspension upper portion arranged between the first wire hook and the second wire hook also stops. In this state, if the first axis and the second axis are moved in the long side direction of the upper frame body, the hanging upper portion also moves in the long side direction. At this time, since the total length of the wire from the wire fixing portion to the winch portion is fixed, the height position of the hanging upper portion and the height position of the lifting target device lifted by the hanging upper portion do not change. In this way, with the winch portion stopped operating, the lifting target device lifted by the hanging upper portion can be moved along the long side direction without changing the height position. Therefore, it is possible to move the position of the lifting target device in a plane without changing the height position, and the work efficiency of changing the lifting target device and moving the position in the room is improved.

In the indoor lifting device according to the present disclosure, the one-end moving table has a guide plate addressed to the edge of the first long side and a one-end roller portion capable of rolling on the first long side. The other end moving table preferably has a guide plate addressed to the edge portion of the second long side and a roller portion at the other end capable of rolling on the second long side. According to the above configuration, since it can be moved by using the roller portion, the movement resistance is less than that of sliding.

In the indoor lifting device according to the present disclosure, the first long side and the second long side are each composed of a cylindrical member extending in the longitudinal direction, and one end roller portion and the other end roller portion roll on the cylindrical member. It is preferable to be movable. According to the above configuration, since the roller portion can roll on the cylindrical member, the movement resistance is further reduced.

In the indoor lifting device according to the present disclosure, the one-end roller portion of the one-end moving table is a one-end first roller that can rotate around the first axis and a one-end second roller that can rotate around the second axis. The other end roller portion of the other end moving table is preferably the other end first roller that can rotate around the first axis and the other end second roller that can rotate around the second axis. According to the above configuration, the roller portion is rotatably provided on the first axis and the second axis without specially providing the rotation shaft of the roller portion, so that the configuration is simplified.

In the indoor lifting device according to the present disclosure, the first wire winch can move along the axial direction of the first axis, and the second wire winch can move along the axial direction of the second axis. The wire return wheel can move along the extending direction of the first short side, the wire fixing portion of the second short side can move along the extending direction of the second short side, and the winch portion can move in the short side direction. It is preferable that the wire can be moved in parallel with the wire.

According to the above configuration, all of the first wire hook, the second wire hook, the wire return wheel, the wire fixing portion, and the winch portion can move along the short side direction of the upper frame body. Utilizing this, for example, in a state where the operation of the winch portion is stopped, the lifting target device suspended from the hanging upper portion is moved along the short side direction of the upper frame, and the winch portion and the wire fixing portion are used. Is moved along the short side direction of the upper frame body. By doing so, the device to be lifted by the suspended upper part, with the winch stopped operating, not only moves along the long side direction of the upper frame body without changing the height position, but also. It is also possible to move along the short side direction. As a result, the work efficiency of changing the equipment to be lifted and moving the position in the room is further improved.

In the indoor lifting device according to the present disclosure, the winch is an electric winch. According to the above configuration, the safety and workability of the lifting work in the room are improved as compared with the manual operation of the chain block.

According to the indoor lifting device having the above configuration, a sufficient lifting allowance can be secured even in a room with a low ceiling, and workability is good.

It is a perspective view which shows the structure of the indoor lifting device which concerns on embodiment. It is a flowchart which shows the procedure of the lifting work using the indoor lifting device which concerns on embodiment. FIG. 2 is a diagram showing an initial state. Following FIG. 3, it is a diagram showing a state in which the suspension upper portion is moved directly above the hoisting machine as the lifting target device. Continuing from FIG. 4, a state is shown in which the winch portion is operated to feed out the wire, the hanging upper portion is lowered toward the hoisting machine, and the pulling rope wound around the hoisting machine is hung on the hook which is the attachment portion of the hanging upper portion. It is a figure. Continuing from FIG. 5, it is a view showing a state in which the winch portion is operated to wind the wire, the hanging upper portion is raised, and the hoisting machine is lifted from the floor surface of the machine room. Continuing from FIG. 6, the operation of the winch portion is stopped, the hanging upper part in the state where the hoisting machine is lifted is moved along the long side direction of the upper frame body, and the hoisting machine is held directly above the desired installation position. It is a figure which shows the state which came. Continuing from FIG. 7, it is a view showing a state in which the winch portion is operated to feed out the wire, the hanging upper portion is lowered, and the hoisting machine is lowered to the floor surface at a desired installation position. Continuing from FIG. 8, it is a view showing a state in which the pulling rope wound around the hoisting machine is removed from the hook which is the attachment portion of the hanging upper portion, the winch portion is operated to wind the wire, and the hanging upper portion is pulled upward. In the model diagram showing an example of the work of moving the hoisting machine lifted by the hanging upper part along the short side direction of the upper frame without changing the height position with the winch part stopped. be.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. In the following, the machine room will be described as a room for lifting work, which is an example for explanation. The machine room may be an elevator machine room, or may be a general machine room in which equipment such as an air conditioner, a transformer, a boiler, and a generator are arranged. In addition to this, the indoor lifting device of the present disclosure can be suitably applied to any room in which a sufficient lifting allowance for the lifting device is desired.

Further, as the lifting target device, a hoisting machine which is an elevator part will be described, but this is an example for explanation, and a device other than the hoisting machine may be used. For example, in the machine room of an elevator, a control panel or the like may be used, and in the case of a general machine room, an air conditioner, a transformer, a boiler, a generator, or the like is the equipment to be lifted.

The number of columns, the shapes of the long and short sides constituting the upper frame, etc. described below are examples for explanation, and are in accordance with the specifications of the indoor lifting device in the embodiment according to the present disclosure. It can be changed as appropriate. In the following, similar elements will be designated by the same reference numerals in all drawings, and duplicate description will be omitted.

FIG. 1 is a perspective view showing the configuration of the indoor lifting device 10. Hereinafter, unless otherwise specified, the indoor lifting device 10 is referred to as a lifting device 10. The lifting device 10 is used for lifting work of lifting the lifting target device from the floor surface 8 by using the device to be replaced or rearranged as the lifting target device in the machine room 6 where the lifting allowance is sufficiently secured. It is a device.

The lifting device 10 includes four columns 11, 12, 13, 14 and an upper frame body 20 supported by the columns 11, 12, 13, 14 and having a rectangular frame shape. These form a gantry. Further, it includes a hanging upper portion 40 for lifting the lifting target device, a wire 50 hung on the hanging upper portion 40, and a winch portion 60 for feeding and winding the wire 50. Further, as a mechanism for raising and lowering the suspension upper portion 40 according to the unwinding and winding of the wire 50 of the winch portion 60, the first shaft 70 and the second shaft 72, the first wire hook 80 and the second wire hook 82, and the wire return Includes a wheel 84 and a wire fixing portion 86. Further, as a mechanism for causing the suspension upper portion 40 to move in a plane parallel to the floor surface 8 of the machine room 6, one end moving table 90 and the other end moving table 91 are included. These elements can be disassembled and assembled, and when the lifting work is performed in the machine room 6, they are carried into the machine room 6 in the form of individually disassembled elements and have the shape shown in FIG. 1 in the machine room 6. Assembled. In the following, the form of FIG. 1 after assembly will be described as the lifting device 10.

FIG. 1 shows the vertical direction, the long side direction, and the short side direction as the three orthogonal directions. The vertical direction is a direction parallel to the gravity direction with respect to the floor surface 8 of the machine room 6, the gravity direction is the lower side, and the opposite direction is the upper side.

Two directions orthogonal to each other in the floor surface 8 which is a plane perpendicular to the vertical direction can be arbitrarily determined. Here, the upper frame body 20 has a rectangular frame shape, and the long side direction in which the long side extends and the short side direction in which the short side extends are the operating directions of the suspension upper portion 40 in the lifting device 10. The side direction and the short side direction are two directions perpendicular to the vertical direction. When distinguishing between the two directions in the long side direction, the two long sides are called the first long side and the second long side, and the direction toward the first long side is the direction on the first long side side and the second long side. The direction toward is called the direction on the second long side. Similarly, when distinguishing between the two directions in the short side direction, the two long sides are called the first short side and the second short side, and the direction toward the first short side is the direction on the first short side, and the first The direction toward the second short side is called the direction on the second short side.

The four columns 11, 12, 13, and 14 are column members that are erected upward from the floor surface 8 of the machine room 6 and have a rectangular cross section perpendicular to the axial direction. Each of the columns 11, 12, 13, and 14 is a height-variable column member whose total height H0 can be adjusted according to the ceiling height of the machine room 6. Since the columns 11, 12, 13, and 14 have the same configuration, the contents will be described as represented by the columns 11.

The column 11 includes a lower column portion 15, an upper column portion 16, a fitting column portion 17, a guide hole portion 18 provided in the lower column portion 15, and a fixing bolt 19.

The lower pillar portion 15 and the upper pillar portion 16 have the same cross section perpendicular to the axial direction. The fitting pillar portion 17 is integrated with the lower pillar portion 15 and extends downward of the lower pillar portion 15, and the cross-sectional area perpendicular to the axial direction thereof is in the axial direction of the lower pillar portion 15 and the upper pillar portion 16. It is set smaller than the vertical cross-sectional area. The guide hole portion 18 provided in the lower pillar portion 15 is a hole that can accept the fitting pillar portion 17, and the fitting pillar portion 17 can be inserted into the guide hole portion 18. By changing the insertion depth, the total height H0 of the support column 11 can be changed. A plurality of height adjusting holes are provided in the fitting pillar portion 17 and the lower pillar portion 15 at appropriate pitches along the axial direction, respectively, and at the position of the insertion depth corresponding to the desired total height, the fixing bolt 19 is used. Fixed to each other.

The arrangement relationship of the columns 11, 12, 13, and 14 on the floor surface 8 of the machine room 6 is set so as to be the positions of the four corners of the rectangular frame-shaped arrangement. The length of the long side and the length of the short side of the rectangular frame shape arrangement can be determined by the size of the hoisting machine 100 (see FIG. 3 and below) which is the lifting target device, the specifications for changing the arrangement position, and the like. ..

The upper frame body 20 is a frame body having a rectangular frame shape in which four corners are defined by four corner members 22, 24, 26, 28 provided at the tops of the columns 11, 12, 13, and 14. The corner member 22 is fixed to the top of the column 11, the corner member 24 is fixed to the top of the column 12, the corner member 26 is fixed to the top of the column 13, and the corner member 28 is fixed to the top of the column 14. The height position of the upper surface of the corner members 22, 24, 26, 28 measured with reference to the floor surface 8 of the machine room 6 is the highest position in the lifting device 10. Therefore, when it is desired to increase the lifting allowance in the lifting device 10, the support columns 11, The total height H0 of 12, 13 and 14 may be increased.

The upper frame body 20 has long side members 32 and 34 and short side members 36 and 38 that form a rectangular frame shape. In the following, unless otherwise specified, the long side member 32 is the first long side 32, the long side member 34 is the second long side 34, the short side member 36 is the first short side 36, and the short side member 38 is the second short side. Call it 38. One end of the first long side 32 is supported by the corner member 26, and the other end is supported by the corner member 24. The second long side 34 is supported by a corner member 28 at one end and a corner member 22 at the other end. One end of the first short side 36 is supported by the corner member 28, and the other end is supported by the corner member 26. The second short side 38 is supported by a corner member 22 at one end and a corner member 24 at the other end.

The cross-sectional shapes of the first long side 32, the second long side 34, the first short side 36, and the second short side 38 perpendicular to the axial direction can be arbitrarily designed according to the specifications of the lifting device 10. For example, each may have a rectangular cross section. In the example of FIG. 1, the first long side 32, the second long side 34, and the first short side 36 are shaft members having a circular cross section, and the second short side 38 is a shaft member having a square cross section. Is.

The suspension upper portion 40 includes a lifting pulley 42 on which the wire 50 is hung, and a mounting portion 44 on which a lifting rope 110 (see FIG. 5 and below) wound around a hoisting machine 100, which is a lifting target device, is hung. The outer diameter of the lifting pulley 42 is D1, and the wire 50 is hung along this outer diameter. Disc-shaped flanges are arranged on both sides of the lifting pulley 42 in the axial direction so that the wires 50 do not fall off, and the lifting pulley 42 can rotate around an axis connecting the two flanges. The mounting portion 44 is a hook-shaped hook connected to a shaft connecting the two flange portions. The hook type hook is an example, and a hook having a rope stopper or the like may be used.

The wire 50 is a rope-shaped member suspended on the lifting pulley 42 in order to raise and lower the suspension upper portion 40 in the vertical direction, and its diameter is d. The other end 51 of the wire 50 is fixed to the second short side 38 side and stretched along the long side direction in the plane of the upper frame body 20, and one end descends downward from the first short side 36 side. It is fixed to the drum 66 of the winch portion 60. The wire 50 is stretched along the long side direction at a position substantially intermediate between the first long side 32 and the second long side 34 arranged in parallel in the plane of the upper frame body 20. Further, the wire 50 is hung in a U shape from the in-plane of the upper frame body 20 to the lower side in the middle between the second short side 38 side and the first short side 36 side, and is lifted to the U-shaped portion. The heavy pulley 42 is arranged.

In the winch portion 60, a support beam 62 that is bridged and fixed between the support columns 13 and the support column 14 along the short side direction, a winch holding portion 64 supported by the support beam 62, and a wire 50 are wound around the winch portion 60. The drum 66 and the drum drive motor 68 are included. Both ends of the central axis of the drum 66 are rotatably held by the winch holding portion 64. Further, the drum 66 is driven by the drum drive motor 68 and rotates in the forward direction or the reverse direction around the central axis of the drum 66. Since one end of the wire 50 is fixed to the drum 66, for example, when the drum 66 rotates in the forward direction, the wire 50 is wound around the drum 66, and when the drum 66 rotates in the opposite direction, the wire 50 is unwound from the drum 66. The operation of the drum drive motor 68 is controlled by the lifting control terminal 69. The maintenance worker who performs the lifting work can operate the lifting control terminal 69 to unwind or wind the wire 50. The winch portion 60 is an electric winch, but instead of the drum drive motor 68, a manual winch in which a manual handle is attached to the drum 66 and an appropriate forward / reverse rotation selection means is provided may be used.

Next, a mechanism for raising and lowering the hanging upper portion 40 in the vertical direction will be described. This mechanism is similar to raising and lowering a car and a counterweight using a plurality of pulleys in an elevator, and the first wire hook 80 and the second wire hook arranged in the plane of the upper frame 20. 82, a wire return wheel 84, and a wire fixing portion 86 are used.

When the wires 50 are arranged in the direction in which they are stretched, the wire fixing portion 86, the second wire hook 82, and the first wire hook are arranged from the second short side 38 side to the first short side 36 side along the long side direction. The car 80 and the wire return wheel 84 are arranged directly under the wire 50, respectively. The position directly below the wire 50 is a position substantially intermediate between the first long side 32 and the second long side 34 arranged parallel to each other in the plane of the upper frame body 20. Since the wire 50 extends downward from the wire return wheel 84 to reach the drum 66 of the winch portion 60, the drum 66 of the winch portion 60 also has the first long side 32 and the second long side 34 arranged in parallel with each other. It is placed in the middle position of.

The first axis 70 and the second axis 72 shown by the broken lines in FIG. 1 are two axes that are arranged along the long side direction with a predetermined parallel separation interval LS and extend in the short side direction. The setting of the predetermined parallel separation interval LS will be described later.

The first wire hook 80 is rotatably held by the first shaft 70. The second wire hook 82 is rotatably held by the second shaft 72. The outer diameter of the first wire hook 80 and the outer diameter of the second wire hook 82 are the same and are D2. Disc-shaped flanges are provided on both sides of the first wire hook 80 and the second wire hook 82 in the axial direction so that the wire 50 does not fall off. If the length dimension of the first wire hook 80 and the second wire hook 82 along the axial direction is sufficiently longer than the diameter of the wire 50, the flange portion may be omitted.

The wire return wheel 84 is rotatable around the first short side 36, and is used to change the extending direction of the wire 50 from the long side direction to the vertical direction. The diameter of the wire return wheel 84 is D2. The first short side 36 has at least a circular cross section in the axial direction of the portion where the wire return wheel 84 is arranged so that the wire return wheel 84 can rotate. In the example of FIG. 1, the cross section in the axial direction is circular over the entire length of the first short side 36.

The wire fixing portion 86 is provided on the second short side 38 and is a member for fixing the other end 51 of the wire 50. In the example of FIG. 1, the other end 51 of the wire 50 is folded back from the wire fixing portion 86 and bound to the folded-back source portion. Since the wire fixing portion 86 does not have to rotate with respect to the second short side 38, both the second short side 38 and the wire fixing portion 86 have a square cross section perpendicular to the axial direction. This is an example for explanation, and the second short side 38 and the wire fixing portion 86 may have other cross-sectional shapes. In order to standardize each element of the lifting device 10, the second short side 38 is used as a shaft body having the same circular cross section as the first short side 36, and the wire fixing portion 86 is used as a vehicle member similar to the wire return wheel 84. May be good.

In the mechanism for raising and lowering the suspension upper portion 40 in the vertical direction, the wires 50 are arranged as follows. In the wire 50 hung on the lifting pulley 42 of the suspension upper portion 40, one end extends upward from the lifting pulley 42 and extends parallel to the long side direction from the first wire hook 80 toward the wire return wheel 84. It extends downward from the return wheel 84 and is fixed to the drum 66 of the winch portion 60. The other end 51 of the wire 50 suspended on the lifting pulley 42 extends upward from the lifting pulley 42 and extends parallel to the long side from the second wire hook 82 toward the second short side 38. It is folded back at the wire fixing portion 86 of the short side 38, and is bound and fixed to the folded-back source. Here, when the winch portion 60 is operated and, for example, the drum 66 is rotated in the forward direction, the wire 50 is wound around the drum 66, and when the drum 66 is rotated in the opposite direction, the wire 50 is unwound from the drum 66. Since the straight line distance from the wire fixing portion 86 to the wire return wheel 84 along the long side direction is constant in the plane of the upper frame body 20, when the wire 50 is wound around the drum 66, the lifting pulley of the suspension upper portion 40 is used. 42 goes up. On the contrary, when the wire 50 is unwound from the drum 66, the lifting pulley 42 of the suspension upper portion 40 is lowered. By operating the winch portion 60 in this way, the hanging upper portion 40 can be raised and lowered in the vertical direction. The amount of lifting and lowering of the hanging upper portion 40 is half of the amount of unwinding and winding of the wire 50 in the drum 66 of the winch portion 60.

When the winch portion 60 is operated to wind up the wire 50, the lifting pulley 42 is pulled upward between the gaps along the long side direction between the first wire hook 80 and the second wire hook 82. , It can be raised to near the height of the upper frame body 20. In the case of a chain block, the lifting height is limited by the size of the assembly that houses the reduction gear, load chain, etc., but according to the above configuration, it is not restricted, so in the machine room 6 with a low ceiling. Can also take a large lifting allowance.

Here, the setting of the predetermined parallel separation interval LS will be described. In order for the lifting pulley 42 to be able to move up and down between the gaps between the first wire hook 80 and the second wire hook 82 along the long side direction, it is necessary to satisfy the following conditions. That is, rather than {(radius of the second wire hook 82) + (diameter of the wire 50) + (diameter of the lifting pulley 42) + (diameter of the wire 50) + (radius of the first wire hook 80)} It is necessary that the LS is large. (Diameter of lifting pulley 42 = D1), (Radius of second wire hook 82) = (Radius of first wire hook 80)} = {(1/2) D2}, (Diameter of wire 50 = d) ) Is used to set the LS so as to satisfy LS> (D1 + D2 + 2d).

The first shaft 70 and the second shaft 72 may be fixed to the upper frame body 20 only for the purpose of raising and lowering the hanging upper portion 40 in the vertical direction. If the hoisting machine 100 can be moved to an arbitrary arrangement position in the machine room 6, the workability of the lifting work is improved. Therefore, some examples of the mechanism for moving the suspension upper portion 40 along the long side direction, including the configuration shown in FIG. 1, will be described.

In the first example, for the first shaft 70 and the second shaft 72, one end thereof is attached to the one-end moving table 90 and the other end is attached to the other end moving table 91 to secure a predetermined LS. Then, the one-end moving table 90 and the other-end moving table 91 are moved along the long side direction while being guided along the first long side 32 and the second long side 34, respectively. In this example, the one-end moving table 90 and the other-end moving table 91 can incorporate a linear moving mechanism such as a linear motor (not shown), and the first long side 32 and the second long side 34 have flat upper surfaces. Can be formed as a plate member having a rectangular cross section in the axial direction. The maintenance worker who performs the lifting work can operate an appropriate movement operation terminal to operate the one-end moving table 90 and the other-end moving table 91 in synchronization with each other.

In the second example, as a modification of the first example, instead of incorporating a linear moving mechanism such as a linear motor, one end moving table 90 is provided with one end roller portion, and the other end moving table 91 is provided with the other end roller. A part is provided. In this case, when the maintenance worker manually moves the hanging upper portion 40 or the hoisting machine 100 suspended therein along the long side direction, one end roller portion rolls on the upper surface of the first long side 32. It moves, and the other end roller portion rolls on the upper surface of the second long side 34.

The third example is the second modification, in which the first long side 32 and the second long side 34 are each composed of a cylindrical member extending in the longitudinal direction. As a result, the one-end roller portion and the other-end roller portion can roll on the cylindrical member, so that the rolling resistance is smaller than that of rolling on a flat surface, and the maintenance worker requires less labor. The suspension upper portion 40 or the hoisting machine 100 suspended by the suspension upper portion 40 can be moved along the long side direction. In this case, since the one-end roller portion and the other-end roller portion roll on the uppermost ridgeline of the cylindrical member, a disk-shaped flange portion is provided so as not to fall off from the cylindrical member.

The fourth example is a third modification in which one end roller portion and the other end roller portion are each composed of two rollers, and these rollers are attached to the first shaft 70 and the second shaft 72. be. FIG. 1 shows the configuration of the fourth example.

In FIG. 1, the guide plate 92 in the one-end moving table 90 is a member to which one end of the first shaft 70 and one end of the second shaft 72 are fixed with a predetermined parallel separation interval LS. Similarly, the guide plate 93 in the other end moving table 91 is a member to which the other end of the first shaft 70 and the other end of the second shaft 72 are fixed with a predetermined parallel separation interval LS. Here, one end of the first axis 70 and the second axis 70 is an end portion on the first long side 32 side, and the other end of the first axis 70 and the second axis 72 is the second long side 34. The end on the side.

With this configuration, the two guide plates 92 and 93 and the first shaft 70 and the second shaft 72 are combined in a rectangular frame shape. A one-end first roller 94 that can rotate around the first axis is arranged on the first shaft 70 on the one-end moving table 90 side, and the second shaft 72 can rotate around the second shaft 72. On the other hand, the second roller 96 at the end is arranged. Similarly, the first axis 70 on the other end moving table 91 side is arranged with the other end first roller 95 that is rotatable around the first axis, and the second axis 72 is rotatable around the second axis 72. The second roller 97 at the other end is arranged. The diameters of the first roller 94 at one end, the first roller 95 at the other end, the second roller 96 at one end, and the second roller 97 at the other end are all D2.

The configuration of FIG. 1 can be a simple configuration because the first shaft 70 and the second shaft 72 are used as the shafts that rotatably support the four rollers as compared with the third example described above. Further, two of the first roller 94 at one end and the second roller 96 at one end roll on the first long side 32 of the cylindrical member, and the first roller 95 at the other end and the other on the second long side 34 of the cylindrical member. Since the two end second rollers 97 roll, the movement of the one end moving table 90 and the other end moving table 91 along the long side direction is stable.

In FIG. 1, the spacer pipes 85 and 87 arranged on the first shaft 70 are ring-shaped spacers having a predetermined axial length. The predetermined axial lengths of the spacer pipes 85 and 87 are set so that the arrangement position of the first wire hook 80 is directly below the wire 50. The spacer pipe 85 is arranged between the first roller 94 at one end and the first wire hook 80, and the spacer pipe 87 is arranged between the first roller 95 at the other end and the first wire hook 80. Similarly, although the reference numerals are omitted, in the second shaft 72, between the one end second roller 96 and the second wire hook 82, and the other end second roller 97 and the second wire hook 82. A spacer pipe is also placed between them. Further, on the second short side 36, the spacer pipe 88 is arranged between the corner member 26 and the wire return wheel 84, and the spacer pipe 89 is arranged between the corner member 28 and the wire return wheel 84. These spacer pipes may be fixed around the axis on which they are arranged, but may also be rotatable.

By using the spacer pipes 85, 87, 88, 89, the positions of the first wire hooking wheel 80, the second wire hooking wheel 82, and the wire return wheel 84 on the upper frame body 20 along the short side direction are fixed. .. Although not shown in FIG. 1, the wire fixing portion 86 and the winch portion 60 are provided with position fixing means such as a fixing pin for the second short side 38 and the support beam 62, respectively. As a result, the positions of the wire fixing portion 86 and the winch portion 60 on the upper frame body 20 along the short side direction are fixed.

The processing content of the work of lifting the hoisting machine 100, which is the equipment to be lifted, and further moving it to an arbitrary position along the long side direction by using the lifting device 10 having the above configuration will be described in detail below. do. FIG. 2 is a flowchart showing a processing procedure of the lifting work. 3 to 9 are diagrams showing the contents of each process of FIG. 2. Each of FIGS. 3 to 9 is a front view of the lifting device 10 as viewed from the second long side 34 side. In these figures, the elements related to the lifting work are coded, and the other elements are omitted.

In the front view seen from the second long side 34 side, the first long side 32 overlaps the second long side 34 and is not shown. Similarly, the one-end moving table 90 overlaps the other end moving table 91. Not shown. The first wire hook 80, the one-end first roller 94, and the other-end first roller 95 all overlap at the same position, and the second wire hook 82, the one-end second roller 96, and the other-end second roller 97 all overlap. Although they all overlap at the same position, they are all hidden by the other end moving table 91, so they are indicated by a broken line. With respect to these, in each of the steps of FIGS. 3 to 9, the reference numerals of the rotating elements and the rotation directions of the elements are indicated by arrows.

In order to move and install the hoisting machine 100 in the machine room 6, the lifting device 10 is assembled and installed in the machine room 6 to bring it into the initial state (S10). FIG. 3 shows the lifting device 10 in the initial state. In the initial state, the suspension upper portion 40 is at the initial position P0 substantially intermediate between the first short side 36 and the second short side 38. The winch portion 60 appropriately winds up the wire 50 in the initial state, sets the hanging upper portion 40 at an appropriate vertical position, and then stops the operation.

In the following, regarding the position in the machine chamber 6, the corner portion of the support column 11 of the lifting device 10 is set as the origin (0,0) of the position coordinates, and the position coordinates along the long side direction from this origin (0,0). Is shown by the position coordinates along the short side direction. The initial position P0 of the suspension upper portion 40 is (L0, S0), and the initial position P1 of the hoisting machine 100 is (L1, S0). That is, P0 and P1 have the same position along the short side direction and different positions along the long side direction.

Returning to FIG. 2, next, the suspension upper portion 40 is moved to the position P1 (L1, S0) directly above the hoisting machine 100 (S12). FIG. 4 shows the contents of the process of S12. Here, while the operation of the winch portion 60 is stopped, the maintenance worker 4 holds the hanging upper portion 40 by hand and moves the positions of the hanging upper portion 40 and the wire 50 suspended from the hanging upper portion 40 from P0 to P1. When the operation of the winch portion 60 is stopped, the total length of the wire 50 up to the wire fixing portion 86 and the wire return wheel 84 does not change. In this state, when the positions of the hanging upper portion 40 and the wire 50 suspended from the hanging upper portion 40 are moved from P0 to P1, one end first roller 94 and one end second roller 96 roll on the first long side 32. The first roller 95 at the other end and the second roller 97 at the other end roll on the second long side 34. In FIG. 4, the rotation directions of the first roller 94 at one end and the first roller 95 at the other end and the rotation directions of the second roller 96 at one end and the second roller 97 at the other end are indicated by arrows, respectively. It should be noted that the wire 50 does not move, the wire return pulley 84 is not rotating.

Returning to FIG. 2, next, the hoisting machine 100 is attached to the suspension upper portion 40 (S14). Two steps are processed in this step. In the first procedure, the winch portion 60 is operated to lower the suspension upper portion 40 to a height position suitable for lifting the hoisting machine 100. In the second procedure, the hoisting machine 100 is attached to the attachment portion 44 of the lowered suspension upper portion 40. FIG. 5 summarizes these two processing procedures in one figure.

In the first procedure, the maintenance worker 4 goes out of the lifting device 10, operates the lifting control terminal 69, operates the winch portion 60, and pays out the wire 50 in the direction in which the hanging upper portion 40 descends. Let me. Then, when the suspension upper portion 40 is lowered to a desired height position, the suspension control terminal 69 is operated to stop the operation of the winch portion 60. In FIG. 5, the feeding direction of the wire 50 is indicated by an arrow. At this time, the first roller 94 at one end, the first roller 95 at the other end, the second roller 96 at one end, and the second roller 97 at the other end do not rotate, and the hanging upper portion 40 does not move in the long side direction. The unwound wire 50 extends downward through the first wire hook 80 and lowers the suspension upper portion 40. At this time, the first wire hook 80 rotates in the direction in which the wire 50 extends in the direction indicated by the arrow in FIG. The second wire hook 82 does not rotate in principle, but may rotate slightly due to the influence of the wire 50 being unwound.

When the suspension upper portion 40 is lowered to a predetermined height, the maintenance worker 4 presses the stop button of the suspension control terminal 69 to stop the operation of the winch portion 60. After that, the second procedure is performed. FIG. 5 shows a maintenance worker 4'entering an internal area of the lifting device 10 surrounded by struts 11, 12, 13, 14 to perform the second procedure. The maintenance worker 4'passes the pulling rope 110 through the rope hooks 102 and 104 provided on the hoisting machine 100, binds both ends thereof to form an annular rope, and hangs the annular rope on the attachment portion 44 of the suspension upper portion 40. As a result, the hoisting machine 100 is attached to the attachment portion 44 of the suspension upper portion 40.

Returning to FIG. 2, next, the lifting upper portion 40 is raised to lift the hoisting machine 100 (S16). The contents are shown in FIG. Here, the maintenance worker 4 goes out of the lifting device 10, operates the lifting control terminal 69, operates the winch portion 60, and winds the wire 50 in the direction in which the hanging upper portion 40 rises. Then, when the lifting upper portion 40 is raised and the hoisting machine 100 is lifted from the floor surface 8 to a desired height position, the lifting control terminal 69 is operated to stop the operation of the winch portion 60. .. In FIG. 6, the lifting amount between the hoisting machine 100 and the floor surface 8 is indicated by a white arrow. Here, the first roller 94 at one end, the first roller 95 at the other end, the second roller 96 at one end, and the second roller 97 at the other end do not rotate, and the hanging upper portion 40 does not move in the long side direction. The wound wire 50 is pulled upward through the first wire hook 80 to raise the suspension upper portion 40. At this time, the first wire hook 80 rotates in the direction in which the wire 50 is pulled up in the direction indicated by the arrow in FIG.

Returning to FIG. 2, when the hoisting machine 100 is lifted from the floor surface 8, the hanging upper portion 40 is then moved along the long side direction, and the hoisting machine 100 is placed at the desired installation position P2 (L2, S0). ) Is moved to just above (S18). The position S0 along the short side direction of the desired installation position P2 is the same as P0 and P1, and the position L2 along the long side direction is different from P0 and P1.

This process differs from the process content of S12 in two points. That is, in S12, the hoisting machine 100 is not suspended on the suspension upper portion 40, but is on the floor surface 8. The other is that the moving direction of the hanging upper portion 40 is opposite along the long side direction. FIG. 7 shows the contents of the process of S18. Here, with the operation of the winch portion 60 stopped, the maintenance worker 4 enters the internal region of the lifting device 10, the wire 50 suspended on the suspension upper portion 40 and the suspension upper portion 40, the side surface of the hoisting machine 100, and the like. And move the position of the hanging upper part 40 from P1 to P2. As described in FIG. 4 corresponding to S12, the first roller 94 at one end and the second roller 96 at one end roll on the first long side 32, and the first roller 95 at the other end and the second roller 97 at the other end are second. 2 Roll on the long side 34. In FIG. 7, the rotation directions of the first roller 94 at one end and the first roller 95 at the other end, and the rotation directions of the second roller 96 at one end and the second roller 97 at the other end are indicated by arrows. Wire 50 does not move, word hate return pulley 84 is not rotating.

Returning to FIG. 2, after the hoisting machine 100 has moved to just above the desired installation position P2, the hanging upper portion 40 is lowered and the hoisting machine 100 is lowered to the floor surface 8 (S20). This process differs from the first procedure in S14 in that the hoisting machine 100 is not suspended on the suspension upper portion 40 but is on the floor surface 8. FIG. 8 shows the processing content. Here, the maintenance worker 4 goes out of the lifting device 10, operates the lifting control terminal 69, operates the winch portion 60, and feeds the wire 50 in the direction in which the hanging upper portion 40 descends. Then, after confirming that the hoisting machine 100 has landed on the floor surface 8, the lifting control terminal 69 is operated to stop the operation of the winch unit 60. In FIG. 8, the feeding direction of the wire 50 is indicated by an arrow, and the descending direction of the hoisting machine 100 is indicated by a white arrow. At this time, the first roller 94 at one end, the first roller 95 at the other end, the second roller 96 at one end, and the second roller 97 at the other end do not rotate, and the hanging upper portion 40 does not move in the long side direction. The unwound wire 50 extends downward through the first wire hook 80 and lowers the suspension upper portion 40. At this time, the first wire hook 80 rotates in the direction in which the wire 50 extends in the direction indicated by the arrow in FIG.

As a result, the hoisting machine 100 has been moved from the position of P1 (L1, S0) in the initial state to the desired installation position P2 (L2, S0). Etc., and the installation is completed (S22). FIG. 9 shows a state in which the pulling rope 110 connecting the hoisting machine 100 and the hanging upper portion 40 is removed and the hanging upper portion 40 is raised to a predetermined standby height. Since the process of raising the hanging upper portion 40 is almost the same as the contents described in S16 and FIG. 6, the details thereof will be omitted.

By using the lifting device 10, the hoisting machine 100, which is a heavy object, is lifted upward at the position of P1 (L1, S0) in the initial state, and the desired installation position P2 (L2, S0) is lifted. You can move it to just above and lower it down to install it in that position. Since the lifting upper portion 40 of the lifting device 10 can be raised to a height substantially the same as the height of the lifting device 10 in the vertical direction, a large lifting allowance can be obtained in the machine room 6 having a low ceiling. Further, since the operation control of the winch unit 60 for lifting or lowering the hoisting machine 100 can be performed not in the internal region of the lifting device 10 but in the outside thereof, the lifting device 10 in which the hoisting machine 100 is located is located. The control operability is improved as compared with the case where the operation control is performed in the internal area of. Further, when the hoisting machine 100 is ascending or descending, the maintenance worker 4 is outside the internal region of the lifting device 10, so that the work safety is improved.

In the above, the suspension upper portion 40 and the hoisting machine 100 can be moved along the long side direction, but the positions along the short side direction remain the same S0. Under this characteristic, the initial position P0 of the suspension upper 40 and the initial position P1 of the hoisting machine 100 are made the same, and the initial position P1 of the hoisting machine 100 and the desired installation position P2 are aligned along the long side direction. The lifting device 10 may be arranged so as to be. If this is not possible due to the arrangement of other equipment inside the machine room 6, the suspension upper portion 40 and the hoisting machine 100 are not only moved along the long side direction, but also in the direction along the short side direction. If it can be done, the degree of freedom of lifting work will be improved and the work efficiency will be improved.

As a method of moving the suspension upper portion 40 and the hoisting machine 100 along the long side direction and the short side direction, the long side direction moving portion and the short side direction moving portion are formed on the upper frame body 20 in a two-story structure. It is conceivable to place it. This method is structurally somewhat complicated. In another method, in the configuration of FIG. 1, the first wire hook 80, the second wire hook 82, the wire return wheel 84, and the wire fixing portion 86 can be moved along the short side direction, and the winch portion 60 is further provided. It is to be able to move along the short side direction.

FIG. 10 is a diagram showing an example of a lifting device 120 capable of moving the suspension upper portion 40 and the hoisting machine 100 along the long side direction and the short side direction according to the above alternative idea. The differences from FIG. 1 are as follows.

Spacer pipes 85 and 87 that have restricted the movement of the first wire hook 80 along the first shaft 70 are not arranged. Similarly, the spacer pipe that restricts the movement of the second wire hook 82 along the second shaft 72 is not arranged. Further, the spacer pipes 88 and 89 that restrict the movement of the wire return wheel 84 along the first short side 36 are also not arranged. The wire fixing portion 86 is removed from a position fixing means such as a stop pin (not shown in FIG. 1). Similarly, in the winch portion 60, the position fixing means such as the stop pin (not shown) is removed in FIG. Then, the winch holding portion 64 of the winch portion 60 is provided with the operation rod 122 for moving the winch, and the wire fixing portion 86 is provided with the operating rod 124 for moving the wire fixing portion.

FIG. 10 shows, as an example, a case where the position P1 (L1, S0) of the suspension upper portion 40 is moved to the position P2'(L2, S2). The position P1 (L1, S0) is the position of the hoisting machine 100 in the initial state in FIG. The position L2 along the long side direction of the position P2'(L2, S2) is the position L2 along the long side direction of the desired installation position P2 (L2, S0) of the hoisting machine 100 in FIG. In this example, the suspension upper portion 40 is not moved obliquely from the position P1 (L1, S0) to the position (L2, S2), but is relayed from the position P1 (L1, S0) to the relay position P1'(L1, S2). Then, a two-step movement is performed to move to the position P2'(L2, S2).

Of the two-step movement, the movement of the latter half from the position P1'(L1, S2) to the position P2'(L2, S2) is the same S2 along the short side direction and the position along the long side direction. Moves from L1 to L2. Therefore, it corresponds to the process of S18 in the flowchart of FIG. 2, and the process shown in FIG. 7 may be performed.

Of the two-step movement, the movement of the first half from the position P1 (L1, S0) to the relay position P1'(L1, S2) is a movement along the short side direction. FIG. 10 shows maintenance workers 4, 4'performing this process. After stopping the operation of the winch unit 60, the maintenance worker 4 enters the internal region of the lifting device 120, holds the suspension upper portion 40 and the hoisting machine 100 (not shown in FIG. 10) with one hand. Hold the operation rod 122 for moving the winch with the other hand. Then, these are moved from S0 to S2 along the short side direction. As a result, the first wire hook 80 moves from S0 to S2 along the first shaft 70, and the second wire hook 82 moves from S0 to S2 along the second shaft 72. Further, the winch portion 60 also moves from S0 to S2 along the support beam 62, and the wire return wheel 84 also moves from S0 to S2 along the first short side 36 along with these movements. The other maintenance worker 4'operates the operation rod 124 for moving the wire fixing portion while observing the state of these movements, and moves the wire fixing portion 86 along the second short side 38 from S0 to S2. Move towards.

This process is performed with a movement amount within a range in which the tension state of the wire 50 does not change so much, and this process is repeated to move the wire 50 to the relay position P1'(L1, S2). By doing so, the hoisting upper portion 40 and the hoisting machine 100 (not shown in FIG. 10), which are not shown in FIG. It can be moved to (L1, S2). When the movement to the relay position P1'(L1, S2) is completed, the position fixing means such as the removed stop pin is fixed to the winch portion 60 and the wire fixing portion 86 at that position.

Now that the hanging upper portion 40 has moved from the position P1 (L1, S0) to the relay position P1'(L1, S2), the processing of S18 or less in FIG. 2 is performed thereafter. As a result, the hoisting machine 100 can be lifted from the initial position (P1, S0) and moved to the desired installation position P2'(P2, S2).

Rolling bearings and the like are provided on the first wire hooking wheel 80, the second wire hooking wheel 82, the wire return wheel 84, and the wire fixing portion 86 so as to be smoothly moved along the short side direction. May be good. Further, depending on the situation, another maintenance worker may be assigned to operate the operation rod 122 for moving the winch.

By using the lifting device 120, the lifting upper portion 40 and the hoisting machine 100 can be moved not only in the long side direction but also in the short side direction, and the degree of freedom in lifting work is high. Is improved, and work efficiency is also improved.

4,4'Maintenance worker, 6 Machine room, 8 Floor surface, 10,120 (indoor) lifting device, 11,12,13,14 columns, 15 Lower columns, 16 Upper columns, 17 Fitting columns , 18 guide hole, 19 fixing bolt, 20 upper frame, 22, 24, 26, 28 corner member, 32 first long side (long side member), 34 second long side (long side member), 36 first Short side (short side member), 38 Second short side (short side member), 40 Suspended upper part, 42 Lifting pulley, 44 Mounting part, 50 Wire, 51 (Wire) other end, 60 winch part, 62 Support beam , 64 winch holder, 66 drum, 68 drum drive motor, 69 lifting control terminal, 70 1st axis, 72 2nd axis, 80 1st wire pulley, 82 2nd wire pulley, 84 wire return wheel, 85 , 87, 88, 89 Spacer pipe, 86 Wire fixing part, 90 One end moving table, 91 Another end moving table, 92, 93 Guide plate, 94 One end first roller, 95 Another end first roller, 96 One end first 2 rollers, 97 2nd roller on the other end, 100 hoisting machine, 110 pulling rope, 122 (for winch movement) operation rod, 124 (for wire fixing part movement) operation rod.

Claims (6)

With multiple columns erected upward from the floor,
It has a rectangular frame shape supported by the plurality of columns and composed of a first long side and a second long side arranged parallel to each other, and a first short side and a second short side arranged parallel to each other. Upper frame and
One end is arranged on the first long side side and the other end is arranged on the second long side side, and the first axis parallel to the short side direction, which is the extending direction of the short side,
A second axis whose one end is arranged on the first long side and the other end is arranged on the second long side and is arranged at a predetermined parallel separation interval from the first axis.
A first wire hook that can rotate around the first axis, and
A second wire hook that can rotate around the second axis,
A wire return wheel rotatably supported around the first short side,
Lifting pulleys, and a suspension upper part having a mounting portion attached to the lifting pulleys to lift the equipment to be lifted.
A wire hung on the lifting pulley, one end of which extends upward from the lifting pulley and extends parallel to the wire return wheel from the first wire hook toward the wire return wheel from the wire return wheel. It extends downward, and the other end extends upward from the lifting pulley and extends parallel to the long side from the second wire hook toward the second short side to the wire fixing portion of the second short side. With fixed wires
A winch portion having a drum for feeding and winding the wire and being held by the support column on the lower side of the wire return wheel.
Bei to give a,
The first axis and the second axis are
Each one end is attached to one end mover, the other end is attached to the other end mover,
The one-end moving table and the other-end moving table are guided by the first long side and the second long side, respectively, and can move in the long side direction.
Indoor lifting device. The one-end moving table has a guide plate addressed to the edge of the first long side and a one-end roller portion capable of rolling on the first long side.
The indoor lifting according to claim 1 , wherein the other end moving table has a guide plate addressed to the edge portion of the second long side and a other end roller portion capable of rolling on the second long side. Heavy equipment. The second longer side and the first long side is formed of a columnar member extending in the longitudinal direction, the one end roller portion and the other side end roller unit, it can roll over the columnar member , The indoor lifting device according to claim 2. The one-end roller portion of the one-end moving table is a one-end first roller that can rotate around the first axis and a one-end second roller that can rotate around the second axis.
The other end said second end roller portion of the movable carriage, said first axis rotatable and the other end first roller around, and a second shaft rotatable other end a second roller around, claim 3 The indoor lifting device described in. The first wire hooking wheel can move along the axial direction of the first axis.
The second wire hooking wheel can move along the axial direction of the second axis.
The wire return wheel can move along the extending direction of the first short side.
The wire fixing portion of the second short side can move along the extending direction of the second short side.
The indoor lifting device according to any one of claims 1 to 4 , wherein the winch portion can move in parallel in the short side direction. The indoor lifting device according to any one of claims 1 to 5 , wherein the winch portion is an electric winch.

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