Lifting system

Abstract

To provide a lifting system that suppresses the rotation of a lift stage.SOLUTION: A lifting system comprises: a lift stage that is liftably arranged along a wall surface of a structure; a first lifting device that is arranged to support the lift stage in a first face side of the wall surface and operates to lift the lift stage; a first guide member connected to the lift stage; and a first guide-receiving member that, extending in the lifting direction of the lift stage, is arranged to be able to contact with the first guide member so that the lift stage in its lifting motion is restrained from rotating to a first direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] One embodiment of the present invention relates to a lifting system including a lifting stage that moves up and down along a wall surface of a structure. [Background technology]

[0002] In the construction or demolition of large structures such as buildings or apartment buildings, a lifting system equipped with a lifting stage that rises and falls along the outer periphery of the structure is used (see, for example, Patent Document 1). In the lifting system, multiple lifting devices are installed below the lifting stage, and the lifting stage can be raised and lowered by operating the lifting devices. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 60-43572 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in lifting systems, a moment of inertia is generated due to the influence of unbalanced loads or wind caused by the tilt of the lifting stage, causing the lifting stage to rotate or twist while it is being raised or lowered. This rotation and twisting of the lifting stage creates variations in the amount of movement among multiple lifting devices, which results in further tilting of the lifting stage, making it difficult to operate the lifting system automatically and continuously.

[0005] In view of the above-mentioned problems, one object of one embodiment of the present invention is to provide an elevator system that suppresses rotation and twisting of the elevator stage. [Means for solving the problem]

[0006] A lifting system according to one embodiment of the present invention includes a lifting stage that is installed so as to be able to rise and fall along the wall surface of a structural body; a first lifting device that is installed to support the lifting stage on the first surface side of the wall surface and operates to raise and lower the lifting stage; a first guide member that is connected at one end to the lifting stage and has at the other end a first wheel that is rollable with its axial direction normal to the first surface; and a first guide support member that is installed to abut the first wheel and extends in the lifting direction of the lifting stage.

[0007] The first guide receiving member may be connected to at least a portion of the structure.

[0008] Two first guide members may be provided with the first guide receiving member sandwiched therebetween.

[0009] The first guide member may have a U-shape when viewed from above.

[0010] In a top view, the first guide receiving member may be located between the structure and the lift stage.

[0011] Furthermore, it may include a second lifting device installed to support the lifting stage on a second surface side different from the first surface of the wall surface and operating to raise and lower the lifting stage, a second guide member having one end connected to the lifting stage and the other end equipped with a second wheel that can roll with its axial direction normal to the second surface, and a second guide receiving member installed to abut the second wheel and extending in the lifting direction of the lifting stage.

[0012] The structure may be a polyhedral cylinder containing at least one obtuse angle, or a circular or elliptical cylinder. [Effects of the Invention]

[0013] According to one embodiment of the present invention, rotation and twisting of the lift stage are suppressed when the lift stage is raised or lowered, thereby stabilizing automatic continuous operation of the lift system. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a usage mode of an elevator system according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating a configuration of an elevator system according to an embodiment of the present invention. [Figure 3] 1 is a top view showing a configuration of a lifting system according to an embodiment of the present invention; [Figure 4] 1 is a top view showing a configuration of a lifting system according to an embodiment of the present invention; [Figure 5] 1 is a schematic diagram showing the configuration and operation of a lifting device of a lifting system according to an embodiment of the present invention; [Figure 6] 1 is a perspective view showing a configuration of a guide receiving member of a lifting system according to an embodiment of the present invention; [Figure 7] 3A and 3B are schematic diagrams illustrating a configuration of a guide member of a lifting system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, a lifting system according to an embodiment of the present invention will be described with reference to the drawings. However, the lifting system according to an embodiment of the present invention can be implemented in many different forms, and should not be construed as being limited to the description of the example shown below. In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same reference numerals, and repeated description thereof will be omitted.

[0016] In each embodiment of the present invention, the direction in which the lifting system moves against gravity is referred to as "upward," and the opposite direction is referred to as "downward." In the following description, for example, the expression "a second member above a first member" merely describes the positional relationship between the first member and the second member in the up-down direction (vertical direction), and other members may be disposed between the first member and the second member. Furthermore, when the expression "a second member above a first member" is used, the first member and the second member may not overlap in a top view. On the other hand, when the expression "a second member vertically above a first member" is used, it means that the first member and the second member overlap in a top view.

[0017] In this specification, unless otherwise specified, expressions such as "α includes A, B, or C," "α includes any one of A, B, and C," and "α includes one selected from the group consisting of A, B, and C" do not exclude cases where α includes multiple combinations of A to C. Furthermore, these expressions do not exclude cases where α includes other elements.

[0018] [1. Configuration of the lifting system 10] The configuration of the lifting system 10 will be described with reference to Figs. 1 to 4. Fig. 1 is a perspective view showing a usage state of the lifting system 10 according to one embodiment of the present invention. Fig. 2 is a schematic diagram showing the configuration of the lifting system 10 according to one embodiment of the present invention. Fig. 3 is a top view showing the configuration of the lifting system 10 according to one embodiment of the present invention. Fig. 4 is a top view showing the configuration of the lifting system 10 according to one embodiment of the present invention.

[0019] As shown in FIG. 1 , the lifting system 10 is installed to surround the outer periphery of the structure 20 and moves up and down along the outer periphery of the structure 20. The structure 20 is, for example, a building such as a detached house, an apartment, a condominium, or a commercial building. The structure 20 is a rectangular structure (i.e., a quadrangular prism having four outer peripheries) when viewed from above, but is not limited thereto. The structure 20 may be a polygonal structure such as a triangular or pentagonal structure (i.e., a polygonal prism having multiple outer peripheries) when viewed from above, or may be a circular or elliptical structure (i.e., a cylindrical or elliptical cylinder having a curved outer periphery) when viewed from above. The lifting system 10 has a ring structure that surrounds the outer periphery of the structure 20 located inside. That is, in this embodiment, the lifting system 10 has a polygonal ring structure, but may also have a circular ring structure depending on the outer shape of the structure 20.

[0020] In this embodiment, a usage mode in which the lifting system 10 is installed around the outer periphery of the structure 20 will be described, but the lifting system 10 can also be installed not only on the outside of the structure 20 but also on the inside. In this case, the lifting system 10 can move up and down along at least one surface (for example, a part of the inner periphery) provided on the inside of the structure 20. Therefore, hereinafter, both the outer surface (for example, the outer periphery) and the inner surface (inner periphery) of the structure 20 may be described as the wall surface of the structure 20.

[0021] As shown in Fig. 2(A), the lifting system 10 includes a lifting stage 100, a lifting device 200, a rod 210, a rod stay 220, a guide member 230, a guide receiving member 240, and a control device 300. For ease of explanation, a structure 20 located inside the lifting system 10 is omitted from Fig. 2(A).

[0022] The lifting stage 100 provides a foothold for workers or various pieces of equipment. Although not shown, the lifting stage 100 has a main frame to which plate-like members or grating members that function as footholds are fixed. Also, although not shown, fences or handrails are provided on the inside (the side closer to the structure 20) and the outside (the side farther from the structure 20) of the lifting stage 100. In this embodiment, a configuration in which the lifting stage 100 continuously surrounds the entire outer periphery of the structure 20 has been shown, but the configuration of the lifting stage 100 is not limited to this. For example, the lifting stage 100 may be provided along a portion of the outer periphery of the structure 20.

[0023] The lifting device 200 supports the lifting stage 100 and operates to raise and lower the lifting stage 100. More specifically, the lifting device 200 operates to move along the extension direction of the rod 210. A detailed configuration and operation of the lifting device 200 will be described later. In this embodiment, the lifting device 200 is installed below the lifting stage 100, but the installation position of the lifting device 200 is not limited thereto. For example, the lifting device 200 may be installed above the lifting stage 100 or inside the lifting stage 100. The lifting device 200 is fixed to a main frame of the lifting stage 100. Although FIG. 2(A) shows a configuration in which only two lifting devices 200 are installed along one side of the lifting stage 100, other lifting devices 200 (not shown) may be installed along other sides.

[0024] The rod 210 extends in the vertical direction along the outer circumferential surface of the structure 20. The rod 210 is fixed to the structure 20 via a rod stay 220. The rod stay 220 extends from the rod 210 toward the structure 20 and is detachably fixed to the structure 20. By fixing the rod 210 to the structure 20 using the rod stay 220, the horizontal position of the rod 210 is fixed. As a result, it is possible to suppress horizontal deviation of the lifting stage.

[0025] As will be described in detail later, the rod 210 is provided so as to penetrate the inside of the lifting device 200. Therefore, when the lifting device 200 rises, the rod stay 220 is attached to the rod 210 and the structure 20 after the lifting device 200 has passed. On the other hand, when the lifting device 200 descends, the rod stay is detached from the rod 210 and the structure 20 before the lifting device 200 has passed.

[0026] As shown in FIG. 3 , the lifting devices 200 are provided along each side of the rectangular lifting stage 100. In this embodiment, two lifting devices 200 are provided on each side, but the configuration of the lifting devices 200 is not limited to this. One lifting device 200 may be provided on each side of the lifting stage 100, or three or more lifting devices 200 may be provided on each side. For example, when the outer circumferential surface of the structure 20 includes multiple surfaces, multiple lifting devices 200 are installed on at least two different surfaces of the outer circumferential surface of the structure 20. Furthermore, in this embodiment, the same number of lifting devices 200 are provided on each side of the lifting stage 100, but the configuration of the lifting devices 200 is not limited to this. The number of lifting devices 200 provided on at least some of the sides of the lifting stage 100 may be different from the number of lifting devices 200 provided on the other sides. For example, when the shape of the lifting stage 100 is rectangular when viewed from above, the number of lifting devices 200 provided on the long sides may be greater than the number of lifting devices 200 provided on the short sides.

[0027] The guide member 230 is installed so as to protrude from the lifting stage 100 towards the structure 20. That is, one end of the guide member 230 is connected to the lifting device 200, and the other end protrudes generally in the normal direction of the opposing surface of the outer circumferential surface of the structure 20 (that is, one of the multiple surfaces included in the outer circumferential surface of the structure 20). The other end of the guide member 230 is equipped with a wheel. The wheel is connected to the other end of the guide member 230 so as to be able to roll with the normal direction as its axial direction.

[0028] The guide receiving member 240 is installed so as to abut the wheels of the guide member 230 (see FIG. 2(B)), and extends in the lifting direction (vertical direction) of the lifting stage. That is, the guide receiving member 240 has an abutment surface that extends in the lifting direction and against which the wheels of the guide member 230 abut. When the lifting stage 100 moves up and down, the wheels of the guide member 230 roll on the abutment surface of the guide receiving member 240. In the lifting system 10, the lifting stage 100 moves up and down while the guide member 230 is guided by the guide receiving member 240. The configuration of the guide receiving member 240 has been described above, but this configuration is one example of the guide receiving member 240, and the configuration of the guide receiving member 240 is not limited thereto. For example, the guide receiving member 240 may be configured to extend in the lifting direction, and the cross-sectional shape of the guide receiving member 240 is not particularly limited. For example, the cross-sectional shape of the guide receiving member 240 is rectangular, circular, elliptical, or H-shaped. Therefore, the contact surface of the guide receiving member 240 that comes into contact with the wheel may be flat or curved.

[0029] Here, the arrangement of guide members 230 and guide receiving members 240 will be described with reference to Fig. 3. Fig. 3 shows four guide members 230 (first guide member 230-1 to fourth guide member 230-4) and four guide receiving members 240 (first guide receiving member 240-1 to fourth guide receiving member 240-4). First guide member 230-1 and first guide receiving member 240-1 are arranged to face third guide member 230-3 and third guide receiving member 240-3. Second guide member 230-2 and second guide receiving member 240-2 are arranged to face fourth guide member 230-4 and fourth guide receiving member 240-4.

[0030] The first guide receiving member 240-1 is located on the left side in the direction in which the first guide member 230-1 protrudes, and the wheels of the first guide member 230-1 abut against one surface on the right side of the first guide member 240-1. On the other hand, the second guide receiving member 240-2 is located on the right side in the direction in which the second guide member 230-2 protrudes, and the wheels of the second guide member 230-2 abut against one surface on the left side of the second guide member 240-2. The third guide member 230-3 and the third guide receiving member 240-3 are similar to the first guide member 230-1 and the first guide receiving member 240-1, and the fourth guide member 230-4 and the fourth guide receiving member 240-4 are similar to the second guide member 230-2 and the second guide receiving member 240-2. When the lift stage 100 attempts to rotate in the first rotation direction D1, the first guide receiving member 240-1 and the third guide receiving member 240-3 lock the first guide member 230-1 and the third guide member 230-3, respectively. This prevents the lift stage 100 from rotating in the first rotation direction D1. When the lift stage 100 attempts to rotate in the second rotation direction D2, the second guide receiving member 240-2 and the fourth guide receiving member 240-4 lock the second guide member 230-2 and the fourth guide member 230-4, respectively. This prevents the lift stage 100 from rotating in the second rotation direction D2. In other words, in the lift system 10, the guide member 230 is locked by the guide receiving member 240, thereby preventing the lift stage 100 from rotating in the first rotation direction D1 and the second rotation direction D2.

[0031] In this embodiment, the first guide member 230-1 and the first guide receiving member 240-1, as well as the third guide member 230-3 and the third guide receiving member 240-3, suppress rotation of the lift stage 100 in the first rotation direction D1, and the second guide member 230-2 and the second guide receiving member 240-2, as well as the fourth guide member 230-4 and the fourth guide receiving member 240-4, suppress rotation of the lift stage 100 in the second rotation direction D2. Depending on the inherent characteristics or installation location of the lift system 10, the lift stage 100 may be prone to rotation only in a specific rotation direction. In that case, the guide members 230 and the guide receiving members 240 may be arranged so that rotation of the lift stage 100 in only one of the first rotation direction D1 and the second rotation direction D2 is suppressed. For example, in order to suppress rotation of the lift stage 100 in the first rotation direction D1, only the first guide member 230-1 and the first guide receiving member 240-1 and the third guide member 230-3 and the third guide receiving member 240-3 may be arranged.

[0032] 3, it is preferable that a plurality of guide members 230 and a plurality of guide receiving members 240 are arranged so as to face each other, but a configuration in which only one guide member 230 and one guide receiving member 240 are arranged is also possible. Also, the wheels of the guide member 230 may be slightly spaced apart from the contact surface of the guide receiving member 240. Even in this case, the guide member 230 is locked by the guide receiving member 240, thereby preventing the lifting stage 100 from rotating.

[0033] Here, with reference to FIG. 4, the lifting system 10 that can be applied to a structure other than the structure 20 having a square pillar will be described.

[0034] FIG. 4(A) shows a lifting stage 100 used in the case of a structure 20 that is an octagonal prism having eight outer faces. When viewed from above, the shape of the lifting stage 100 is octagonal. The angle between two adjacent faces of the structure 20 is 135°, and similarly, the angle between two adjacent sides of the lifting stage 100 is also 135°. Four guide members 230 are installed on the lifting stage 100 so as to protrude from the lifting stage 100 toward the structure 20. In addition, four guide receiving members 240 are installed between the structure 20 and the lifting stage 100.

[0035] 4(B) shows a lifting stage 100 used in the case of a cylindrical structure 20. When viewed from above, the shape of the lifting stage 100 is a dodecagon. The angle between two adjacent sides of the lifting stage 100 is 150°. Four guide members 230 are installed on the lifting stage 100 so that each of the guide members 230 protrudes from the lifting stage 100 toward the structure 20. Four guide receiving members 240 are installed between the structure 20 and the lifting stage 100.

[0036] 4(A) and 4(B), a lift stage 100 having at least one obtuse angle is particularly susceptible to rotation due to the influence of wind, etc. However, in the lift system 10, even if the lift stage 100 has at least one obtuse angle, the guide member 230 is locked by the guide receiving member 240, so that rotation of the lift stage 100 can be suppressed when the lift stage 100 is raised or lowered.

[0037] The control device 300 is a so-called computer, and functions by executing a predetermined program or sequence. The control device 300 includes, for example, a central processing unit (CPU), a microprocessor (MPU), or a graphics processing unit (GPU) that performs arithmetic processing using data or information. The control device 300 also includes a storage device such as random access memory (RAM), read-only memory (ROM), flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), a display device such as a liquid crystal display (LCD) or an OLED, or a communication interface.

[0038] The control device 300 is connected to a plurality of lifting devices 200 and controls the operation of the lifting devices 200 to raise and lower the lifting stage 100. The control device 300 can not only simultaneously control the operation of a plurality of lifting devices 200, but also control the operation of only some of the plurality of lifting devices 200. For example, if the lifting stage 100 is tilted, the control device 300 can control the operation of the lifting device 200 that requires correction of the amount of movement.

[0039] [2. Configuration and operation of the lifting device] 5A to 5C are schematic diagrams showing the configuration and operation of the lifting device 200 of the lifting system 10 according to one embodiment of the present invention.

[0040] The lifting device 200 includes a housing 201 , an actuator 202 , and grippers 203 and 204 .

[0041] The housing 201 supports the lift stage 100. The actuator 202 and the grippers 203 and 204 are disposed inside the housing 201. Openings 205 and 206 are provided at the top and bottom of the housing 201. A rod 210 is inserted through the openings 205 and 206.

[0042] One end of actuator 202 is connected to gripper 203, and the other end is connected to gripper 204. Grippers 203 and 204 are arranged so as to be movable within housing 201 along rod 210 as actuator 202 expands and contracts. Actuator 202 may be an electric actuator, a hydraulic actuator, a pneumatic actuator, or an electrorheological fluid actuator. In this embodiment, a hydraulic cylinder is used as actuator 202.

[0043] The gripping units 203 and 204 fix the positions of the gripping units 203 and 204 relative to the rod 210 by gripping the rod 210, and release the rod 210 to make the positions of the gripping units 203 and 204 relative to the rod 210 movable. The gripping units 204 also support the housing 201. Note that, although the present embodiment has been described with reference to a configuration in which the gripping units 204 support the upper part of the housing 201 from below, the present invention is not limited to this configuration. For example, the gripping units 204 may support the sides of the housing 201 from the sides. Alternatively, the gripping units 204 may support the housing 201 via another member.

[0044] As shown in FIG. 5(A), when the actuator 202 is contracted, the gripper 203 grips the rod 210, and the gripper 204 releases the rod, the actuator 202 extends, causing the gripper 204 to push the housing 201 upward, and the lift stage 100 is pushed upward as shown in FIG. 5(B). From the state shown in FIG. 5(B), the gripper 204 grips the rod 210, the gripper 203 releases the rod 210, and the actuator 202 contracts, causing the gripper 203 to move upward as shown in FIG. 5(C). From the state shown in FIG. 5(C), the gripper 203 grips the rod 210, and the gripper 204 releases the rod 210, returning to the state shown in FIG. 5(A). As described above, the lift stage 100 rises by repeating the operations shown in FIGS. 5(A) to 5(C). When the lift stage 100 descends, it operates in the reverse order of FIG. 5(C), FIG. 5(B), and FIG. 5(A).

[0045] As described above, in this embodiment, the guide member 230 and the guide receiving member 240 suppress rotation and twisting of the lift stage 100 when the lift stage 100 is raised or lowered. This enables stable automatic continuous operation of the lift system 10.

[0046] <Variation 1> A modified example of the lifting system 10 will be described with reference to Fig. 6. Here, as Modification 1, a description will be given of the lifting system 10 including a guide receiving member 240A that is different from the guide receiving member 240. Note that when the configuration of the lifting system 10 according to this modification is the same as the configuration described above, the description of the configuration may be omitted.

[0047] FIG. 6 is a perspective view showing the configuration of a guide receiving member 240A of the lifting system 10 according to one embodiment of the present invention.

[0048] 6 shows guide receiving member 240A connected to the outer peripheral surface of structure 20. Depending on the structure 20, a groove extending in the vertical direction may be provided on the outer peripheral surface of structure 20. In this case, a plate-like member or an L-shaped member can be inserted into the groove and used as guide receiving member 240A that guides and locks guide member 230 connected to lifting stage 100. This prevents lifting stage 100 from rotating when lifting stage 100 moves up and down.

[0049] The guide receiving member 240A does not necessarily have to extend continuously from the ground to the top of the structure 20. The guide receiving member 240A may be partially connected to the structure 20 in accordance with the elevation stage 100 rising and falling.

[0050] In the first modification, rotation of the lift stage 100 is suppressed when the lift stage 100 is raised or lowered, so that the lift system 10 can be automatically and continuously operated stably.

[0051] <Variation 2> Another modified example of the lifting system 10 will be described with reference to Fig. 7. Here, as Modification 2, a guide member 230A and a guide member 230B that are different from the guide member 230 will be described. Note that when the configuration of the lifting system 10 according to this modification is the same as the configuration described above, the description of the configuration may be omitted.

[0052] FIG. 7 is a schematic diagram showing the configuration of the guide member 230A and the guide member 230B of the lifting system 10 according to one embodiment of the present invention.

[0053] 7(A) shows two guide members 230A (first guide member 230A-1 and second guide member 230A-2). In a top view, the first guide member 230A-1 and the second guide member 230A-2 are connected to the lifting stage 100 so that a guide receiving member 240 is sandwiched between them. The wheels of the first guide member 230A-1 abut against one surface of the guide receiving member 240, and the wheels of the second guide member 230A-2 abut against another surface opposite to the one surface of the guide receiving member 240. When the lifting stage 100 attempts to rotate in the first rotation direction D1, the guide receiving member 240 locks the first guide member 230A-1, and the rotation of the lifting stage 100 is suppressed. Furthermore, when the lift stage 100 attempts to rotate in the second rotation direction D2, the guide receiving member 240 locks the second guide member 230A-2, thereby suppressing the rotation of the lift stage 100. Therefore, the two guide members 230A connected to one side of the lift stage 100 can suppress the rotation of the lift stage 100 not only in the first rotation direction D1 but also in the second rotation direction D2.

[0054] 7(B) shows a guide member 230B having a U-shape in top view. The guide member 230B has two other ends, each equipped with a wheel. The guide receiving member 240 is located inside the U-shape, and the two wheels abut against one surface of the guide receiving member 240 and another surface opposite the one surface. In this case, too, the guide member 230B connected to one side of the lift stage 100 can suppress rotation of the lift stage 100 not only in the first rotation direction D1 but also in the second rotation direction D2.

[0055] In the second modification as well, rotation of the lift stage 100 is suppressed when the lift stage 100 is raised or lowered, so that the lift system 10 can be automatically and continuously operated stably.

[0056] The above-described embodiments can be implemented by appropriately combining the configurations as long as they are not mutually contradictory. Furthermore, even if a person skilled in the art appropriately adds or deletes the configuration or modifies the design based on the embodiments, or adds or omits a process or modifies conditions, such addition or deletion of the configuration or modification of conditions is included in the scope of the present invention as long as the gist of the present invention is maintained.

[0057] Even if there are other effects and advantages different from those brought about by the above-described embodiments, those that are clear from the description in this specification or that can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0058] 10: Elevation system, 20: Structure, 100: Elevation stage, 200: Elevation device, 201: Housing, 202: Actuator, 203, 204: Grip portion, 205, 206: Opening, 210: Rod, 220: Rod stay, 230, 230A, 230B: Guide member, 230-1, 230A-1: First guide member, 230-2, 230A-2: Second guide member, 230-3: Third guide member, 230-4: Fourth guide member, 240, 240A: Guide receiving member, 240-1: First guide receiving member, 240-2: Second guide receiving member, 240-3: Third guide receiving member, 240-4: Fourth guide receiving member, 300: Control device

Claims

1. a lift stage that is installed so as to be able to move up and down along the wall surface of the structure; a first lifting device that is installed on the first surface side of the wall surface so as to support the lifting stage and that operates to lift and lower the lifting stage; a first guide member having one end connected to the lift stage and the other end including a first wheel that is rotatable around an axial direction that is the normal direction to the first surface; a first guide receiving member that is installed so as to abut against the first wheel and that extends in the lifting direction of the lifting stage.

2. The lifting system according to claim 1 , wherein the first guide receiving member is connected to at least a portion of the structure.

3. The lifting system according to claim 1 , wherein two first guide members are provided with the first guide receiving member sandwiched therebetween.

4. The lifting system according to claim 1 , wherein the first guide member has a U-shape in top view.

5. The lifting system according to claim 1 , wherein the first guide receiving member is located between the structure and the lifting stage in a top view.

6. moreover, a second lifting device that is installed to support the lifting stage on a second surface side of the wall surface that is different from the first surface and operates to lift and lower the lifting stage; a second guide member having one end connected to the lifting stage and the other end including a second wheel that is rotatable around an axial direction that is the normal direction to the second surface; The lifting system according to claim 1 , further comprising: a second guide receiving member that is installed so as to abut against the second wheel and that extends in the lifting direction of the lifting stage.

7. The lifting system of claim 1 , wherein the structure is a polyhedral cylinder including at least one obtuse angle, or a circular or elliptical cylinder.

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