JP2022052615A - Lifting device - Google Patents

Abstract

To provide a lifting device with a rack and pinion driving system capable of significantly reducing noise during operation.SOLUTION: A lifting device moving up/down by its own driving force comprises: a rack rail laid along the vertical direction and having a rack gear formed thereon; at least one driving part for rotationally driving a pinion gear meshing with the rack gear; a move part having a space for transportation and driven by the driving part to move up/down on the rack rail; and a joint part formed by an elastic member to connect an output shaft of the driving part and the pinion gear.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lifting device that raises and lowers by its own driving force.

Currently, many construction elevators (lifting devices) that are temporarily installed at construction sites employ a mechanism that raises and lowers by a rack and pinion drive system. The lifting device provided with this drive system comprises a cage for carrying workers and equipment, and the cage is supported by an elevating frame having a plurality of drive devices. Pinion gears are attached to the output shafts of the plurality of drives. Each pinion gear meshes with the rack rail on which the rack gear is formed. The plurality of drives drive each pinion gear to rotate to raise and lower the elevating frame on which the cage is supported.

According to this lifting device, it can be raised and lowered by its own driving force, and the raising and lowering range can be extended by adding rack rails in the vertical direction according to the progress of construction. Further, according to this lifting device, when the rack rail is added, the elevating frame can be stopped at an arbitrary position by operating the braking device of the driving device. As described above, the lifting device is becoming mainstream because it has a simple and inexpensive configuration and is highly reliable.

Japanese Unexamined Patent Publication No. 2007-284179

According to the above-mentioned lifting device, a pinion gear is directly attached to the output shaft of the speed reducer to form a drive device. The drive unit is rigidly contacted to the lower part of the elevating frame. A highly accurate positional relationship is required between the pinion gear and the rack rail in order to ensure meshing. Therefore, on the back of the rack rail on the opposite side of the rack gear forming surface, an adjust roller that holds the rack rail in cooperation with the pinion gear is placed to ensure a certain backlash between the pinion gear and the rack rail. It is adjusted to be.

In addition, it is necessary that the pinion gears of multiple drive devices face the rack rails in an appropriate manner, and the attitude of the elevating frame is adjusted by adjusting the cores by the guide roller assemblies provided above and below the lifting device. Is adjusted and supported. However, there is a limit to ensuring the vertical accuracy of the rack rails that can be stacked according to the progress of construction and the attitude accuracy of the cage, and the situation is such that it cannot fit in the order of several hundred microns that is originally required for rack pinions.

Therefore, the rack and pinion portion generates a rolling noise larger than usual, and also serves as a vibration source to vibrate the constituent members via the drive shaft. A cage for getting on and off is directly connected to the elevator, and vibration is transmitted from the vibration source. The vibration transmitted to the cage is directly linked to the deterioration of ride quality, and the vibration is radiated from the cage. The vibration radiated from the cage produces a large individual propagating sound due to the large radiation area of the cage.

Due to the above factors, the rack and pinion-driven lifting device has a problem of generating extremely large noise. In the case of a large construction lifting device, it may exceed 100 dB near the inside and outside of the cage, and it is required to reduce noise. The rack and pinion drive type lifting device uses the rolling sound of the rack and pinion contact part propagating in the air, the harmonic sound of the inverter, the roaring sound of the drive device caused by the vibration of the rack and pinion, the solid propagating sound of the cage, etc. as sound sources. It is known to generate a large amount of noise. Although there is an example in which the drive device is covered with a soundproof cover or the like to suppress the noise of harmonics such as an inverter, a large soundproof effect has not been obtained.

An object of the present invention is to provide a lifting device having a rack and pinion drive system capable of significantly reducing noise during operation.

In order to achieve the above object, the present invention is a lifting device that raises and lowers by its own driving force, and is a rack rail laid along a vertical direction in which a rack gear is formed, and a pinion gear that meshes with the rack gear. An elasticity that connects at least one drive unit that rotationally drives the vehicle, a moving unit that is driven by the drive unit to move up and down the rack rail, and an output shaft of the drive unit and the pinion gear. It is a lifting device characterized by comprising a joint portion formed of a member.

According to the present invention, the output shaft of the drive unit that drives the pinion gear that meshes with the rack gear formed on the rack rail and the pinion gear are connected by a joint portion that elastically deforms, so that when the pinion gear is driven. In addition, the vibration and impact generated between the rack gear and the rack gear are prevented from propagating to the lifting device, and the noise generated from the lifting device can be significantly reduced.

Further, the moving portion of the present invention is provided by an elevating frame traveling on the rack rail, a cage provided on the elevating frame and formed with the transport space, and an elastic member connecting the elevating frame and the cage. It may be configured to include a plurality of formed first fixing members.

According to the present invention, by providing the first fixing member that elastically deforms between the elevating frame and the cage, vibration and impact generated in the elevating frame are reduced from propagating to the cage, and noise is generated. Can be significantly reduced.

Further, the moving portion of the present invention includes a drive frame provided on the elevating frame and supporting the drive portion, and a plurality of second fixing members formed of elastic members connecting the elevating frame and the drive frame. , May be provided.

According to the present invention, by providing a second fixing member that elastically deforms between the drive frame and the elevating frame, vibration and impact generated in the drive unit are reduced from propagating to the elevating frame, and noise is generated. Can be significantly reduced.

Further, the guide rail provided in parallel with the rack rail of the present invention and the guide rail provided in the elevating frame are sandwiched between the elevating frame to guide the elevating frame in the elevating direction, and the guide rail is in contact with the guide rail. It may be configured to include a plurality of guide rollers whose tread surface is formed of an elastic member.

According to the present invention, since the tread surface of the guide roller is formed of an elastic member, vibration and impact generated when traveling on the guide rail are reduced from propagating to the elevating frame, and noise is significantly generated. Can be reduced to.

Further, it may be configured to include a plurality of third fixing members formed by elastic members connecting the rack rail of the present invention and the object to be installed.

According to the present invention, the vibration and impact generated in the lifting device are reduced from propagating to the installation object, and the generation of noise can be significantly reduced.

According to the present invention, it is possible to significantly reduce noise during operation of a lifting device having a rack and pinion drive system.

It is a side sectional view which shows the outline of the structure of the lifting device which concerns on embodiment of this invention. It is a rear view which shows the outline of the structure of a lifting device. It is a perspective view which shows the structure of the rail frame. It is sectional drawing which shows the structure of the drive part. It is a perspective view which shows the structure of the joint part. It is a side view which shows the structure of the support part. It is a rear view which shows the structure of the connecting member. It is a figure which shows the structure of the 1st fixing member and the 2nd fixing member. It is a figure which shows the use state of the 3rd elastic member.

Hereinafter, embodiments of the lifting device according to the present invention will be described with reference to the drawings. The lifting device according to the embodiment moves up and down by its own driving force.

As shown in FIGS. 1 to 2, the lifting device 1 includes a rack rail R laid along the vertical direction and a moving portion 2 moving along the rack rail R.

The rack rail R is fixed to a rail frame B fixed to a wall surface W or the like of a structure. Hereinafter, for convenience, the surface viewed from the direction facing the wall surface W (-X direction in the figure) is referred to as a front surface. The rail frame B is formed, for example, in a frame having a truss structure extending in the vertical direction. The rail frame B is configured as a module B1 within a range of a predetermined distance in the vertical direction, and can be extended upward by adding the module B1 to the upper part.

The back side of the rail frame B is fixed to the wall surface W via the fixing member K. A rack rail R is fixed to the front side of the rail frame B. A pair of guide rails G extending along the vertical direction are fixed to both side surfaces of the rail frame B. The rack rail R and the pair of guide rails G are divided into units having the same length as the module B1. The rack rail R and the pair of guide rails G are fixed to the module B1, are expanded with the addition of the module B1, and are extended upward.

As shown in FIG. 3, the rack rail R has a flat tooth rack gear R1 formed on one side surface side. A pinion gear meshes with the rack gear R1 as described later. The other side surface side of the rack rail R is formed flat. An adjust roller runs on the other side surface side of the rack rail R as described later. The pinion gear and the adjust roller support the moving portion 2 and travel in the vertical direction while sandwiching the rack rail R.

The guide rail G is provided in parallel with the rack rail R. The guide rail G is sandwiched by a plurality of guide rollers D. The plurality of guide rollers D are provided in the moving portion 2 as described later, support the moving portion 2, and guide the movement in the vertical direction.

The moving unit 2 is provided with a space for transportation, and is driven by a drive unit described later to move up and down the rack rail R. The moving portion 2 includes an elevating frame 3 that travels along the rack rail R. The elevating frame 3 is formed in a rectangular frame when viewed from the front. The four corners of the elevating frame 3 include four support portions 4 supported by the guide rail G via a plurality of guide rollers D.

The support portion 4 supports, for example, one guide roller D that supports the front side of the guide rail G, two guide rollers D that support the back side of the guide rail G, and the side surface side of the guide rail G. It is provided with one guide roller D. The support portion 4 supports the elevating frame 3 by four guide rollers D, and guides the elevating frame 3 to move in the vertical direction while sandwiching the guide rail G.

A cage 10 having a transport space is fixed to the elevating frame 3. The elevating frame 3 and the cage are connected by a plurality of first fixing members E1 formed of elastic members. This prevents the vibration generated in the elevating frame 3 from propagating to the cage 10. The configuration of the first fixing member E1 will be described later.

The cage 10 is formed in a box-shaped frame. The wall surface, floor, ceiling, and door of the cage 10 are formed by grating in order to reduce the weight. In the elevating frame 3, the lower part of the cage 10 is supported by the upper part of the support frame 3A.

The support frame 3A is formed in a box-shaped frame body protruding in the front direction of the elevating frame 3. The cage 10 and the support frame 3A are connected by a plurality of first fixing members E1 described later. This prevents the vibration generated in the elevating frame 3 from propagating to the cage 10. Below the support frame 3A, a drive frame 5 for supporting the drive unit 20 for raising and lowering the elevating frame 3 is provided.

The drive frame 5 is fixed in the frame of the support frame 3A in front of the elevating frame 3. The drive frame 5 is formed in a box-shaped frame. The drive frame 5 and the elevating frame 3 are supported by a plurality of connecting members C described later. The connecting member C movably supports the drive frame 5 with respect to the elevating frame 3 within a predetermined range in the vertical direction. The drive frame 5 and the support frame 3A are connected by a plurality of second fixing members E2 formed of elastic members. The upper part of the drive frame 5 and the upper part of the support frame 3A are connected by a plurality of second fixing members E2. The lower part of the drive frame 5 and the lower part of the support frame 3A are connected by a plurality of second fixing members E2.

At least one drive unit 20 is fixed inside the drive frame 5. The drive unit 20 is fixed to a plate-shaped portion 6 provided on the drive frame 5. The plate-shaped portion 6 is attached in parallel with the surface facing the elevating frame 3. Three circular holes 6H are formed in the plate-shaped portion 6 along the vertical direction. The drive portion 20 is fixed to the plate-shaped portion 6 so that the output shaft protrudes from the hole 6H.

In the drive frame 5, for example, three drive units 20 are arranged along the vertical direction. The drive unit 20 includes, for example, a motor 21 as a drive source. A speed reducer 22 that reduces the number of revolutions and increases the torque to output is connected to the output shaft (not shown) of the motor 21. A pinion gear P that meshes with the rack gear R1 of the rack rail R is connected to the output shaft 23 of the speed reducer 22. The output shaft of the speed reducer 22 and the pinion gear P are connected by a joint portion 30 formed of an elastic member. The joint portion 30 will be described later.

The pinion gear P meshes with the rack gear R1 on one side surface of the rack rail R. In the rack rail R, an adjust roller J is provided adjacent to the pinion gear P on the other side surface side opposite to the rack gear R1.

The adjust roller J is provided to ensure backlash in the meshing of the pinion gear P and the rack gear R1. The rack rail R is sandwiched between the adjust roller J and the pinion gear P. When the pinion gear P is rotationally driven by the drive unit 20 and meshes with the rack gear R1 of the rack rail R to travel along the rack rail R, the adjust roller J maintains a distance from the pinion gear P to maintain the pinion gear. Prevents P from deviating from the rack gear R1.

The pinion gear P and the adjust roller J are also provided on the upper part of the elevating frame 3. The pinion gear P and the adjust roller J provided on the upper part of the elevating frame 3 are not driven by the drive unit 20, but are provided so as to rotate freely. The pinion gear P and the adjust roller J in the upper part of the elevating frame 3 regulate the rotation of the elevating frame 3 generated by the drive torque of the pinion gear P driven by the drive unit 20.

As a result, the rotation of the elevating frame 3 generated by the drive torque of the pinion gear P is not transmitted to the plurality of guide rollers D traveling along the guide rail G, and the moving portion 2 is smoothly moved up and down. With the above configuration, the drive unit 20 can move up and down along the rack rail R by rotationally driving the pinion gear P.

Next, the vibration and soundproofing measures of the lifting device 1 will be described.

As shown in FIGS. 4 and 5, the output shaft 23 of the speed reducer 22 in the drive unit 20 is connected to the pinion gear P via the joint portion 30. The joint portion 30 is a universal joint that elastically deforms. The joint portion 30 includes a hub 31 formed in a cylindrical shape, a joint disk 32 formed in a donut shape, and a flange hub 33 formed in a disk shape. The hub 31 is formed with a through hole 31H in the axial direction. The output shaft 23 of the speed reducer 22 is inserted into the through hole 31H.

A plurality of pin holes 31P and a plurality of screw holes 31N are formed along the side surface around the radial circumference of the hub 31. The output shaft 23 is formed with a plurality of holes (not shown) or a flat surface such as a D-cut surface (not shown) corresponding to the position of the pin hole 31P. The pin 31Q is fitted into the pin hole 31P up to the flat surface formed on the output shaft 23, the hub 31 is fixed to the output shaft 23, and the output shaft 23 is prevented from slipping.

The joint disk 32 is formed of, for example, an elastic member such as rubber. The joint disk 32 has a through hole 32H formed along the axial direction. A plurality of bolt holes 32N are formed at equal intervals along the circumferential direction on the radial side surface of the joint disk 32. The plurality of bolt holes 32N are formed corresponding to the positions of the plurality of screw holes 31N of the hub 31. A plurality of bolt holes 32V are formed around the through holes 32H of the joint disk 32 along the axial direction. The bolt holes 32N and 32V are formed with a step so that the top of the bolt 32T is buried. The hub 31 is inserted into the through hole 32H from the one end surface side to the other end surface side of the joint disk 32.

The screw hole 31N of the hub 31 and the bolt hole 32N of the joint disk 32 are aligned. The bolt 32T tightens the bolt hole 32N and the screw hole 31N together, and connects the hub 31 and the joint disk 32. On the other end surface side of the joint disk 32, a plurality of pin holes 32P are formed around the through hole 32H. A flange hub 33 is attached to the other end surface side of the joint disk 32.

The flange hub 33 is formed with a disk portion 34 formed in a disk shape and a hub 35 formed in a cylindrical shape concentric with the disk portion 34. A flange hub 33 is attached to one end surface side of the disk portion 34. The disk portion 34 has a through hole 34H formed in the center along the axial direction. The through hole 34H is formed in a D-shaped hole for the reason described later.

A plurality of screw holes 34N are formed around the through hole 34H along the axial direction. The plurality of screw holes 34N are formed corresponding to the positions of the plurality of bolt holes 32V of the flange hub 33. A plurality of pin holes 34P are formed around the through hole 34H along the axial direction. The plurality of pin holes 34P are formed corresponding to the positions of the pin holes 32P of the joint disk 32. A hub 35 is formed on the other end surface side of the disk portion 34. The hub 35 is rotatably supported by the drive frame 5 by the support portion 35M via the bearing 35B.

The hub 35 has a through hole 35H formed in the center along the axial direction. The through hole 35H is formed so as to communicate with the through hole 34H. The through hole 35H is formed, for example, in a D-shaped hole having a flat surface. The shaft P1 of the pinion gear P formed in a D-cut shape having a flat surface is fitted into the through hole 35H. The plurality of pins 34Q are fitted into the plurality of pin holes 34P of the disk portion 34 in a state of protruding toward one end surface side.

The flange hub 33 is attached to the other end surface side of the joint disk 32 on the one end surface side of the disk portion 34. The plurality of pins 34Q protruding from one end surface of the disk portion 34 are press-fitted into the plurality of pin holes 32P of the joint disk 32. In this state, the positions of the screw hole 34N of the disk portion 34 and the bolt hole 32V of the joint disk 32 coincide with each other. A bolt 32T is inserted into the bolt hole 32V and is fastened together with the screw hole 34N. As a result, the joint disk 32 and the flange hub 33 are connected.

With the above configuration, the output shaft 23 of the drive unit 20 and the pinion gear P are connected via the joint portion 30. Since the hub 31 and the flange hub 33 are connected to each other via the joint disk 32 in the joint portion 30, the vibration propagating between the output shaft 23 and the pinion gear P is reduced by the deformation of the joint disk 32. To.

As a result, the vibration generated in the pinion gear P and the rack gear R1 is less likely to propagate to the moving portion 2, and the noise emitted in the moving portion 2 is reduced. The configuration of the joint portion 30 is an example, and other configurations may be used as long as the vibration of the pinion gear P and the rack gear R1 can be reduced.

Next, vibration countermeasures for the guide rail G and the guide roller D that guide the ascending / descending of the moving portion 2 will be described.

As shown in FIG. 6, the support portion 4 includes a plurality of guide rollers D that sandwich the guide rail G and guide the elevating frame 3 in the elevating direction to travel. The illustrated support portion 4 is represented by a support portion 4 arranged in the upper right corner when viewed from the front. The support portion 4 arranged at the lower right when viewed from the front also has the same configuration in the vertical direction. The upper and lower support portions 4 arranged on the left side when viewed from the front are symmetrically configured with the upper and lower support portions 4 on the right side.

The support portion 4 includes a plurality of guide rollers D and a support plate 4A that supports the plurality of guide rollers D. In the support plate 4A, one guide roller D1 traveling on the front side of the guide rail G is rotatably supported. In the support plate 4A, two guide rollers D2 and D3 traveling on the back surface side of the guide rail G are rotatably supported. The guide roller D1 is rotatably supported between the two guide rollers D2 and D3 when viewed from the front.

The guide rail G is sandwiched between the guide roller D1 and the two guide rollers D2 and D3. Above the guide roller D2, a guide roller D4 traveling on the right side surface side of the guide rail G is rotatably supported. The guide roller D4 prevents the moving portion 2 from deviating to the right. In the guide roller D, the tread surface U in contact with the guide rail G is formed in a U-shaped groove shape so as to match the cross-sectional shape of the guide rail G.

The tread surface U is formed of, for example, an elastic member such as urethane. As a result, the vibration generated between the plurality of guide rollers D and the guide rails G and the impact when traveling through the joints of the guide rails G are reduced from propagating to the moving portion 2.

Next, a method for reducing vibration propagating between the support frame 3A and the drive frame 5 will be described.

As shown in FIG. 7, the drive frame 5 and the elevating frame 3 are supported by a plurality of connecting members C. The connecting member C includes a first substrate C1 formed in the shape of a rectangular plate. The first substrate C1 is fixed to the drive frame 5 side by bolts and nuts, for example. The first substrate C1 may be fixed to the support frame 3A side.

The first substrate C1 may be fixed by welding. A pair of support plates C2 projecting in the horizontal direction are formed on the first substrate C1. The pair of support plates C2 are arranged along the vertical direction. The pair of support plates C2 sandwich and fix the shaft C3 formed in a columnar shape from above and below. A slide plate C4 formed in a plate shape is inserted through the shaft C3.

The slide plate C4 is formed with a through hole CH that matches the outer shape of the shaft C3. The base end of the slide plate C4 is fixed to the second substrate C5 formed in the shape of a rectangular plate. The second substrate C5 is fixed to the support frame 3A side, for example. The second substrate may be fixed to the drive frame 5 side.

With the above-mentioned configuration of the connecting member C, the drive frame 5 is movably supported within a predetermined range in the vertical direction with respect to the elevating frame 3. A plurality of second fixing members E2 (see FIGS. 1 and 2) are fixed between the drive frame 5 and the support frame 3A, and the drive frame 5 moves within a predetermined range in the vertical direction with respect to the elevating frame 3. Is regulated. The plurality of second fixing members E2 reduce the propagation of vibration from the drive unit 20 to the elevating frame 3. Similarly, a plurality of first fixing members E1 (see FIGS. 1 and 2) are fixed between the elevating frame 3 and the cage 10, and vibration propagation from the elevating frame 3 to the cage 10 is reduced.

As shown in FIG. 8, the first fixing member E1 includes an elastic portion X formed of an elastic member such as anti-vibration rubber, and a rod bolt Y penetrating the elastic portion X. The bar bolt Y is inserted into a hole penetrating a member of a different fixing target, and is fixed to a different fixing target by a nut. When a relative displacement occurs between different fixed objects, the elastic portion X is deformed to prevent vibration or impact from propagating to different fixed objects.

The second fixing member E2 is also formed with the same configuration as the first fixing member E1. The size and number of the first fixing member E1 and the second fixing member E2 are appropriately changed according to the position and the load of the support target. The first fixing member E1 and the second fixing member E2 can reduce the vibration and impact generated in the moving portion 2.

As a measure against vibration other than the above, a plurality of third fixing members formed of elastic members may be provided in the plurality of fixing members K connecting the rack rail R and the installation object (wall surface W or the like).

As shown in FIG. 9, a third fixing member E3 is provided on the fixing member K connecting between the rail frame B and the wall surface W. The third fixing member E3 has the same configuration as the first fixing member E1. By providing the third fixing member E3, it is possible to reduce the vibration and impact generated in the lifting device 1 from propagating to the wall surface W.

As described above, according to the lifting device 1, the joint portion 30 is provided to connect the pinion gear P and the output shaft 23 of the drive portion 20, so that the joint portion 30 is elastically deformed and the pinion gear P is provided. It is possible to reduce the propagation of vibrations and shocks generated between the rack gear R1 and the rack gear R1 that meshes with the drive unit 20 to the drive unit 20 side. According to the lifting device 1, in the moving portion 2, a plurality of first fixing members E1 are connected between the elevating frame 3 and the cage 10, so that vibrations and impacts generated during the elevating and lowering of the elevating frame 3 are generated. Is reduced to propagate to the cage 10.

According to the lifting device 1, the drive frame 5 and the support frame 3A are connected by a plurality of connecting members C so as to be relatively movable in the vertical direction, and are connected to a plurality of second fixing members E2. This prevents vibrations and shocks generated by the drive unit 20 from propagating to the elevating frame 3. According to the lifting device 1, since the third fixing member E3 is provided between the rail frame B and the wall surface W, the vibration or impact generated in the lifting device 1 can be propagated to the wall surface W. Be prevented. According to the lifting device 1, noise caused by vibration and impact generated during operation can be significantly reduced.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned one embodiment and can be appropriately modified without departing from the spirit of the present invention. For example, in the present embodiment, the lifting device for construction is exemplified, but the present invention is not limited to this, and the lifting device may be applied to a lifting device other than construction or a lifting device for transporting an object other than a person. Further, the above-described configuration may be applied to a moving body using a rack and pinion that moves in the horizontal direction and the diagonal direction.

1 ... Lifting device, 2 ... Moving part, 3 ... Elevating frame, 3A ... Support frame, 4 ... Support part, 4A ... Support plate, 5 ... Drive frame, 6 ... Plate-shaped part, 6H ... Hole, 10 ... Cage, 20 ... Drive unit, 21 ... Motor, 22 ... Reducer, 23 ... Output shaft, 30 ... Joint part, 31 ... Hub, 31H ... Through hole, 31N ... Screw hole, 31P ... Pin hole, 31Q ... Pin, 32 ... Joint Disc, 32H ... Through hole, 32N ... Bolt hole, 32P ... Pin hole, 32T ... Bolt, 32V ... Bolt hole, 33 ... Flange hub, 34 ... Disc part, 34H ... Through hole, 34N ... Screw hole, 34P ... Pin Hole, 34Q ... Pin, 35 ... Hub, 35B ... Bearing, 35H ... Through hole, 35M ... Support, B ... Rail frame, B1 ... Module, C ... Connecting member, C1 ... First board, C2 ... Support plate, C3 ... shaft, C4 ... slide plate, C5 ... second substrate, CH ... through hole, D ... guide roller, D1-D4 ... guide roller, E1 ... first fixing member, E2 ... second fixing member, E3 ... third Fixing member, G ... Guide rail, J ... Adjusting roller, K ... Fixing member, P ... Pinion gear, P1 ... Shaft, R ... Rack rail, R1 ... Rack gear, U ... Tread surface, W ... Wall surface, X ... Elastic part, Y ... Bar bolt

Claims (5)

It is a lifting device that moves up and down by its own driving force.
Rack rails laid along the vertical direction and formed with rack gears,
At least one drive unit that rotationally drives the pinion gear that meshes with the rack gear, and
A moving unit that is provided with a space for transportation and is driven by the drive unit to move up and down the rack rail, and a moving unit.
A lifting device comprising: a joint portion formed by an elastic member connecting the output shaft of the drive portion and the pinion gear. The moving portion includes an elevating frame traveling on the rack rail and
A cage provided on the elevating frame and formed with the transport space,
A plurality of first fixing members formed by an elastic member connecting the elevating frame and the cage are provided.
The lifting device according to claim 1. The moving portion includes a drive frame provided on the elevating frame and supporting the drive portion.
A plurality of second fixing members formed by elastic members connecting the elevating frame and the drive frame are provided.
The lifting device according to claim 2. A guide rail provided parallel to the rack rail and
A plurality of guide rollers provided on the elevating frame, sandwiching the guide rail, guiding the elevating frame in the elevating direction and traveling, and having a tread surface in contact with the guide rail formed of an elastic member. Prepare, prepare
The lifting device according to claim 2 or 3. A plurality of third fixing members formed by elastic members connecting the rack rail and the object to be installed are provided.
The lifting device according to any one of claims 1 to 4.

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