Lifting device and lifting method using the same

Abstract

The present invention provides a lifting device and a lifting method using the same that can lift multiple long components of an elevator or passenger conveyor in an aligned manner. [Solution] The suspension device 1 comprises i) a pair of support bodies 2, 2 each having a first through hole as a suspension hole in a first portion and facing each other at a predetermined distance in a first direction; ii) a lower clamping body 3 provided between the second portions of the pair of support bodies 2, 2, which contacts the component from below as the pair of support bodies 2, 2 rotate around the first direction; and iii) an upper clamping body 4 provided between the third portions of the pair of support bodies 2, 2, which contacts the component from above as the pair of support bodies 2, 2 rotate around the first direction.

Description

Technical Field

[0001] The present invention relates to a suspension tool used in pairs of two for lifting long components of an elevator or a passenger conveyor, and a method for lifting long components of an elevator or a passenger conveyor using this suspension tool. The present invention is suitable for lifting long components such as elevator guide rails and passenger conveyor truss frames, for example.

Background Art

[0002] In an elevator, an elevator car and a counterweight are movable up and down in a hoistway while being guided by guide rails. The guide rails are set to a predetermined length (for example, 5 m or less) in a factory, packed together in a plurality of pieces, then shipped, and carried into the installation work site. At the installation work site, they are connected so as to be continuous in a row from the lowermost part (pit) to the uppermost part in the hoistway and attached to the wall surface of the hoistway.

[0003] As a packing method, it is common to place two sawhorses at a sufficient interval, place a plurality of guide rails side by side on this, repeat this and stack them in a plurality of stages, and then tie up the whole. And at the installation work site, a method is adopted in which the uppermost guide rail is lifted together using a crane of a transport vehicle or a mobile crane in the yard, transferred to another place or a trolley, and this is repeated until the lowermost stage. As a method of lifting a plurality of guide rails together, there are a method of half-hanging or threading a wire rope, and a method using a dedicated jig such as a clamp or a suspension beam.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

[0005] However, when using wire ropes that are partially or fully threaded, the load may be bundled in an irregular manner when lifting it, which could cause the load to collapse when lowering it. When using clamps, clamp marks may be left as scratches on the surface of the guide rail. When using lifting beams, there is the problem that the lifting beams themselves become large.

[0006] There are lifting devices for guide rails, as described in Patent Documents 1 and 2. However, these lifting devices can only lift one guide rail at a time and cannot lift multiple guide rails simultaneously.

[0007] Therefore, the present invention has been made in view of these circumstances, and aims to provide a lifting device and a lifting method using the same that can lift multiple long components of an elevator or passenger conveyor in an aligned state. [Means for solving the problem]

[0008] The suspension device according to the present invention is A lifting device used in pairs to hoist long components of an elevator or passenger conveyor, Each of the first parts has a first through hole as a suspension hole, and a pair of support members facing each other at a predetermined distance in the first direction, A lower clamping body is provided between the second parts of a pair of support members, and as the pair of support members rotate and displace around a first direction, it contacts the component from below. It comprises an upper clamping body provided between the third parts of a pair of support members, which contacts the component from above as the pair of support members rotate and displace around a first direction. It is a lifting device.

[0009] As one embodiment of the suspension device according to the present invention, Of the lower and upper clamping bodies, at least the lower clamping body is detachably mounted on a pair of support bodies. This configuration can be adopted.

[0010] As one embodiment of the suspension device according to the present invention, Each support has a second through-hole in the second portion, The lower clamping body is a column or tube whose ends are inserted into the second through-hole. This configuration can be adopted.

[0011] As one embodiment of the suspension device according to the present invention, The lower clamping body comprises a shaft whose ends are inserted into second through-holes, and a sleeve that is fitted onto the shaft between the second portions of a pair of support members. This configuration can be adopted.

[0012] As one embodiment of the suspension device according to the present invention, A sleeve is a component in which the frictional resistance on the surface side is greater than the frictional resistance on the surface side of the shaft. This configuration can be adopted.

[0013] As one embodiment of the suspension device according to the present invention, Both ends of the lower clamping body have portions that protrude outward from the second through-hole, and retaining members are detachably attached to these protruding portions. This configuration can be adopted.

[0014] The lifting method according to the present invention is A lifting method for lifting long components of an elevator or passenger conveyor, which are placed on spacers such as wooden blocks, using a pair of lifting devices, Remove the lower clamping body from each lifting device. Lower each suspension device and place the components between the pair of supports through the opening at the bottom. The removed lower clamping body is positioned below the component and attached to each suspension device. The lifting mechanism lifts one set of lifting devices with the center of the lifting point between them, and the components are held between the lower clamping body and the upper clamping body while being lifted. It is a lifting method.

[0015] As one aspect of the lifting method according to the present invention, A plurality of components arranged side by side are placed as they are between a pair of supports, and the components are lifted in a state where a plurality of them are aligned together. The method as described above can be adopted.

Effect of the Invention

[0016] According to the present invention, when a plurality of long components arranged side by side are passed through the space surrounded by a pair of supports, a lower clamping body, and an upper clamping body as they are, and the pair of supports are rotationally displaced about the first direction, the plurality of components are overall clamped between the lower clamping body and the upper clamping body and can be lifted. Therefore, according to the present invention, the components can be lifted in a state where a plurality of them are aligned together.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 1 is a side view of six types of guide rails with different sizes as seen from the longitudinal direction. [Figure 2] FIG. 2(a) is a front view of a state where the guide rail with the smallest size is packed. FIG. 2(b) is a side view as seen from the longitudinal direction. [Figure 3] FIG. 3(a) is a front view of a state where the guide rail with the largest size is packed. FIG. 3(b) is a side view as seen from the longitudinal direction. [Figure 4] FIG. 4 is a front view of a lifting tool. [Figure 5] FIG. 5 is an exploded front view of the lifting tool. [Figure 6] FIG. 6 is a side view of the lifting tool. [Figure 7] FIG. 7 is an exploded side view of the lifting tool. [Figure 8] FIG. 8(a) is a side view as seen from the longitudinal direction of a state where the guide rail with the smallest size is suspended. FIG. 8(b) is a cross-sectional view taken along line A-A in FIG. 8(a). [Figure 9]Figure 9(a) is a longitudinal side view of the guide rail with the largest size suspended. Figure 9(b) is a cross-sectional view of the line BB in Figure 9(a). [Figure 10] Figure 10(a) is a front view showing the smallest size guide rail suspended. Figure 10(b) is a side view seen from the longitudinal direction. [Figure 11] Figure 11(a) is a front view showing the guide rail in its maximum size. Figure 11(b) is a side view seen from the longitudinal direction. [Figure 12] Figures 12(a) and (b) illustrate the procedure for removing the lower clamping body of the lifting device. [Figure 13] Figure 13(a) is a front view of the lifting device according to another embodiment 1. Figure 13(b) is a front view of the lifting device according to another embodiment 2. [Modes for carrying out the invention]

[0018] The lifting device according to this embodiment will be described below, but before that, the guide rail, which is the object to be lifted, will be briefly explained.

[0019] Guide rails are available for elevator cars and counterweights. Furthermore, both cars and counterweights come in various sizes. Therefore, as shown in Figure 1, there are multiple types of guide rails with different sizes (in the example, a total of six types, with weight increasing from left to right), ranging from 10A to 10F.

[0020] The guide rails 10A to 10F have a T-shape and are equipped with a base portion 10a and a projection portion 10b. The base portion 10a is a strip-shaped plate with a first direction as its width and extending in a second direction perpendicular to the first direction. The projection portion 10b is a strip-shaped plate extending in the second direction, connected to the center of the base portion 10a at one side, and protruding perpendicularly from the base portion 10a. Hereinafter, the first direction refers to the width direction of the guide rails 10A to 10F, and the second direction refers to the longitudinal direction of the guide rails 10A to 10F.

[0021] Guide rails 10A to 10F are cut to a predetermined length (for example, 5m or less) at the factory, packed in sets of multiples, and then shipped to the installation site. For the smallest size guide rail 10A, as an example, as shown in Figure 2, two wooden blocks 12, 12 are placed parallel to each other in the second direction with sufficient spacing between them, and five guide rails 10A are placed horizontally on top of them in the first direction. This is repeated to stack them in three layers, and then the entire assembly is bundled together for packing. For the largest size guide rail 10F, as an example, as shown in Figure 3, two wooden blocks 12, 12 are placed parallel to each other in the second direction with sufficient spacing between them, and three guide rails 10F are placed horizontally on top of them in the first direction. This is stacked in two layers, and then the entire assembly is bundled together for packing. Note that a connecting plate 11 for guide rails is already attached to one end of each guide rail 10A to 10F.

[0022] <Suspension device configuration> The lifting device is used to lift multiple guide rails of the same size from guide rail 10A to 10F in an aligned state. As shown in Figures 4 to 7, the lifting device 1 comprises a pair of support members 2, 2, a lower clamping body 3, and an upper clamping body 4.

[0023] A pair of support members 2,2 face each other in the first direction with a predetermined distance between them. For example, the predetermined distance is greater than the width when five of the smallest size guide rails 10A in Figure 2 are lined up side by side (base width 10a 90 mm × 5 rails = 450 mm) and the width when three of the largest size guide rails 10F in Figure 3 are lined up side by side (base width 10a 140 mm × 3 rails = 420 mm), and is 480 mm.

[0024] The support 2 is a metal plate material such as iron, steel, stainless steel, or aluminum. For example, the support 2 is a general structural rolled steel material. The support 2 has a triangular shape. The support 2 has a first through hole 2a in the first part, a second through hole 2b in the second part, a third through hole 2c in the third part, and a fourth through hole 2d in the fourth part. The first through hole 2a is used as a suspension hole for attaching a shackle (connector) 8. The second through hole 2b is a hole for fixing the lower clamping body 3. The third through hole 2c is a hole for fixing the upper clamping body 4. The fourth through hole 2d is used as a locking part for securing a string 5. For example, the first part is set at the first corner of the triangular shape, the second part is set at the second corner of the triangular shape, the third part is set at the third corner of the triangular shape, and the fourth part is set between the first and third parts.

[0025] The lower clamping body 3 is provided between the second portions of a pair of support members 2, 2, and contacts the guide rail from below as the pair of support members 2, 2 rotate and displace around a first direction. The lower clamping body 3 is detachably provided on the pair of support members 2, 2. The lower clamping body 3 is a cylindrical body with both ends inserted into the second through-hole 2b. The lower clamping body 3 comprises a shaft 3a and a sleeve 3c. The shaft 3a is a cylindrical body with both ends inserted into the second through-hole 2b. The sleeve 3c is a cylindrical tube that is detachably fitted onto the shaft 3a between the second portions of the pair of support members 2, 2.

[0026] The shaft 3a is a metal rod made of iron, steel, stainless steel, or the like. For example, the shaft 3a is a general structural rolled steel. In contrast, the sleeve 3c is an elastic material made of resin such as rubber. For example, the sleeve 3c is a braided water hose having an inner layer of oil-resistant synthetic rubber, a reinforcing layer of synthetic fibers, and an outer layer of oil-resistant and weather-resistant synthetic rubber. That is, the sleeve 3c is a component made of a material whose coefficient of friction is greater than that of the shaft 3a, and whose surface frictional resistance is greater than that of the surface frictional resistance of the shaft 3a. The coefficient of friction of the sleeve 3c is preferably 0.48 or higher, more preferably 0.57 or higher, and even more preferably 0.78 or higher.

[0027] The inner diameter of the sleeve 3c is the same as or smaller than the outer diameter of the shaft 3a. Therefore, the sleeve 3c is fitted onto the shaft 3a and becomes integrated with the shaft 3a, preventing it from rotating around the axis. In other words, the lower clamping body 3 is a member that has an enlarged portion (enlarged diameter portion or large diameter portion) excluding both ends and a reduced portion (reduced diameter portion or small diameter portion) at both ends.

[0028] The outer diameter of the sleeve 3c is larger than the inner diameter of the second through-hole 2b. Therefore, the lower clamping body 3, through which the shaft 3a is inserted into the sleeve 3c, will not detach from the pair of support members 2,2 unless force is applied to pull out the shaft 3a.

[0029] Both ends of the shaft 3a have pin holes 3b in a direction perpendicular to the axis. Both ends of the shaft 3a have portions that protrude outward from the second through hole 2b, and pin holes 3b are formed in these protruding portions. Washers 3d are attached to these protruding portions, and snap pins 3e are attached to the pin holes 3b. The snap pins 3e are retaining members that prevent the shaft 3a from coming out of the second through hole 2b. The snap pins 3e are detachably attached to the lower clamping body 3. To prevent the snap pins 3e from accidentally falling out when removed from the lower clamping body 3, the snap pins 3e are connected by a string 5 that is secured to the fourth through hole 2d.

[0030] The upper clamping body 4 is provided between the third portions of a pair of support members 2, 2, and contacts the guide rail from above as the pair of support members 2, 2 rotate and displace around a first direction. The upper clamping body 4 is the same as the lower clamping body 3 in both configuration and size. In other words, the lower clamping body 3 and the upper clamping body 4 are identical. For this reason, the second through hole 2b and the third through hole 2c (and also the first through hole 2a) are holes of the same diameter (for example, an inner diameter of 40 mm).

[0031] The configuration of the suspension device 1 according to this embodiment is as described above. As an example, the weight of one suspension device 1 is approximately 5 kg for one support 2, approximately 5 kg each for the shafts 3a and 4a, and approximately 0.5 kg each for the sleeves 3c and 4c, for a total weight of approximately 21 kg.

[0032] <How to use the lifting device (how to lift the guide rail)> Figures 8 and 10 illustrate a lifting method using the smallest size guide rail 10A in Figure 2, where the top five guide rails 10A are lifted together, transferred to another location or a small trolley, and this process is repeated down to the bottom. Figures 9 and 11 illustrate a lifting method using the largest size guide rail 10F in Figure 3, where the top three guide rails 10F are lifted together, transferred to another location or a small trolley, and this process is repeated down to the bottom. Both lifting methods utilize the crane on the transport vehicle or a mobile crane on-site, but the lifting equipment is not limited to these.

[0033] First, two or four slings (lifting ropes) 7 are attached to the hook 6 of the lifting machine, and the ends of the slings 7 are connected to the first through-hole 2a of the lifting device 1 using shackles 8. The slings 7 are made of wire rope, fiber belt, or chain.

[0034] In this case, the space enclosed by the pair of support members 2,2, the lower clamping body 3, and the upper clamping body 4 in the suspension device 1 is closed. Therefore, as it is, the suspension device 1 cannot be set at a location closer to the center of gravity than the location on the guide rail's stud 12 (see Figures 2 and 3).

[0035] Therefore, i) the lower clamping body 3 is removed from the suspension device 1, opening the space below; ii) the suspension device 1 is lowered so that the guide rail is placed into the space through the opening at the bottom; iii) the suspension device 1 is lowered until the position of the second through hole 2b of the suspension device 1 is below the bottom surface of the base 10a of the guide rail; and iv) the removed lower clamping body 3 is attached to the suspension device 1 with the guide rail positioned below it, and the space is closed again.

[0036] The procedure in i) can be explained with reference to Figure 12, and the steps are as follows: ii) Remove the snap pin 3e from one end of the lower clamping body 3; i-ii) There is a gap between the second through hole 2b of the support 2 and the shaft 3a of the lower clamping body 3, and there is a gap between the third through hole 2c of the support 2 and the shaft 4a of the upper clamping body 4 (for example, the inner diameter of the former is 40 mm and the diameter of the latter is 38 mm), so it is possible to tilt one support 2 relative to the other support 2 so that the space between the second through holes 2b, 2b widens, so in this way remove one end of the lower clamping body 3 from the second through hole 2b of one support 2; i-iii) Rotate and shift one support 2 around the axis of the upper clamping body 4; i-iv) Remove the snap pin 3e on the other support 2 side; iv) Move and shift the lower clamping body 3 in the axial direction, and remove the other end of the lower clamping body 3 from the second through hole 2b of the other support 2. The procedure in iv) is the reverse of the procedure in i).

[0037] In this way, v) one of the pair of lifting devices 1,1 is set at a first location on one side of the guide rail in the longitudinal direction relative to the center of gravity, and vi) the other lifting device (second lifting device) 1 is set at a second location on the other side of the guide rail in the longitudinal direction relative to the center of gravity. At this time, the positions of the pair of lifting devices 1,1 are determined such that the lifting angle (the angle of intersection between the sling 7 that lifts one lifting device 1 and the sling 7 that lifts the other lifting device 1) is preferably 30 degrees or more and 60 degrees or less, more preferably 30 degrees or more and 44 degrees or less.

[0038] Then, the pair of lifting devices 1,1 are lifted using the space between them as the suspension center. As a result, in each lifting device 1, a pair of support bodies 2,2 rotate and displace towards the suspension center around the first direction (with the lower clamping body 3 or the upper clamping body 4 as the fulcrum), causing the lower clamping body 3 to contact the guide rail (the bottom surface of its base 10a) from below, and the upper clamping body 4 to contact the guide rail (the tip surface of its protrusion 10b) from above. Because the position where the lower clamping body 3 pushes up the guide rail from below and the position where the upper clamping body 4 presses down on the guide rail from above are misaligned, the lower clamping body 3 and the upper clamping body 4 clamp the guide rail, making it possible to lift it.

[0039] As described above, with the lifting device 1 according to this embodiment, if multiple guide rails placed side by side are passed through the space enclosed by a pair of support bodies 2,2, a lower clamping body 3, and an upper clamping body 4 while maintaining their arrangement, and the pair of support bodies 2,2 are rotated and displaced about a first direction, the multiple guide rails are clamped together by the lower clamping body 3 and the upper clamping body 4 due to the lever principle, and can be lifted. For this reason, with the lifting device 1 according to this embodiment, multiple guide rails of the same size can be lifted together in an aligned state. Moreover, since the load does not collapse, it is safe.

[0040] According to the suspension device 1 of this embodiment, multiple guide rails are held by the clamping of the lower clamping body 3 and the upper clamping body 4, and no separate fastening mechanism (such as a bolt fastening mechanism) is required. Therefore, according to the suspension device 1 of this embodiment, a suspension device can be made that has a simple structure while having a strong holding force.

[0041] According to the suspension device 1 of this embodiment, the distance between the lower clamping body 3 and the upper clamping body 4 in the vertical direction changes depending on the difference in the rotational displacement of the pair of support bodies 2, 2. Therefore, according to the suspension device 1 of this embodiment, one suspension device 1 can be used to accommodate multiple types of guide rails of different sizes (different heights).

[0042] According to the lifting device 1 of this embodiment, the lower clamping body 3 is detachably attached to a pair of support bodies 2, 2, and when the lower clamping body 3 is removed, the space below the area enclosed by the pair of support bodies 2, 2, the lower clamping body 3, and the upper clamping body 4 is opened up. This allows the lifting device 1 to be set in a location on the guide rail that is on the wooden beam 12, but is inside the location on the wooden beam 12 (closer to the center of gravity). This means that, given the same lifting angle, the distance from the lifting machine hook 6 to the guide rail is shorter compared to when the lifting device 1 is set in a location outside the location on the wooden beam 12 (further away from the center of gravity) (in which case it is not necessary to remove the lower clamping body 3). Therefore, according to the lifting device 1 of this embodiment, the guide rail can be lifted without hindrance even at installation sites where there are height constraints.

[0043] In the lifting device 1 according to this embodiment, the lower clamping body 3 and the upper clamping body 4 are components with greater surface frictional resistance compared to those made of metal. This improves the holding force of the guide rail by the lower clamping body 3 and the upper clamping body 4. Therefore, the lifting device 1 according to this embodiment can effectively prevent undesirable situations such as the lifting device 1 slipping towards the center of gravity of the guide rail during lifting, which would cause the balance of the suspended load to be disrupted.

[0044] According to the suspension device 1 of this embodiment, the lower clamping body 3 and the upper clamping body 4 have an elastic layer on their surface side. Therefore, according to the suspension device 1 of this embodiment, it is possible to effectively prevent scratches on the surface of the guide rail.

[0045] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0046] In the above embodiment, the lifting device 1 is used to transfer the guide rails from a state in which they are stacked in a predetermined number of rows and columns to another location or a small trolley. However, the present invention is not limited thereto. The lifting device according to the present invention can be used in various cases for lifting long components of an elevator or passenger conveyor, including guide rails.

[0047] In the above embodiment, the lifting device 1 is used to lift multiple guide rails together. However, the present invention is not limited to this. The lifting device according to the present invention can also be used to lift a single long component.

[0048] In the above embodiment, the lower clamping body 3 and the upper clamping body 4 are detachably provided based on the procedures ii) to iv) described in paragraph 0036 above. However, the present invention is not limited thereto. The second through hole and / or third through hole of the suspension device may be made larger than the maximum diameter of the lower clamping body and / or the upper clamping body so that the lower clamping body and / or the upper clamping body can be moved axially to be attached and detached. Alternatively, the second through hole and / or third through hole of the suspension device may be made slit-shaped so that the lower clamping body and / or the upper clamping body can be moved radially to be attached and detached.

[0049] In the above embodiment, the lower clamping body 3 and the upper clamping body 4 are cylindrical. However, the present invention is not limited thereto. The lower clamping body and / or the upper clamping body may be a cylindrical tube. Also, the lower clamping body and / or the upper clamping body may not be circular, but for example, square. Alternatively, the lower clamping body and / or the upper clamping body may be plate-shaped (they may clamp the components with a surface). Alternatively, the lower clamping body and / or the upper clamping body may be shaped to conform to the shape of the guide rail.

[0050] In the above embodiment, the lower clamping body 3 and the upper clamping body 4 are composed of two parts (shafts 3a, 4a and sleeves 3c, 4c). However, the present invention is not limited thereto. The lower clamping body and / or the upper clamping body may be a single unit.

[0051] In the above embodiment, snap pins 3e and 4e are used to prevent the lower clamping body 3 and the upper clamping body 4 from coming off. However, the present invention is not limited thereto. Other known means of preventing detachment can be used, such as retaining pins other than snap pins, such as parallel pins and cotter pins, retaining rings, and nuts that are screwed onto threaded portions formed at both ends of the clamping body.

[0052] In the above embodiment, the lower clamping body 3 is detachably provided. However, the present invention is not limited thereto. If the suspension device is set in a location where spacers such as wooden blocks do not get in the way, the lower clamping body may be fixed to the support in a way that prevents separation.

[0053] In the above embodiment, the upper clamping body 4 is detachably provided. However, the present invention is not limited thereto. The upper clamping body may be fixed to the support inseparably, as spacers such as wooden blocks do not get in the way when setting it up. However, if the lower and upper clamping bodies are detachably provided, the suspension device can be disassembled and made compact when stored.

[0054] The lifting device 1 shown in Figure 13(a) is the lifting device of Alternative Example 1. The lifting device 1 shown in Figure 13(b) is the lifting device of Alternative Example 2. Needless to say, the lifting device can be composed of various forms. In short, the positional relationship between the lifting hole (first through hole), the lower clamping body (second through hole), and the upper clamping body (third through hole) can be arranged in various patterns, assuming that when the lifting device is lifted through the lifting hole, the lifting device rotates and the lower and upper clamping bodies can clamp the components. [Explanation of Symbols]

[0055] 1…Lifting device, 2…Support, 2a…First through hole, 2b…Second through hole, 2c…Third through hole, 2d…Fourth through hole (locking part), 3…Lower clamping body, 3a…Shaft, 3b…Pin hole, 3c…Sleeve, 3d…Washer, 3e…Snap pin (retaining member), 4…Upper clamping body, 4a…Shaft, 4b…Pin hole, 4c…Sleeve, 4d…Washer, 4e…Snap pin (retaining member), 5…String, 6…Hook, 7…Sling (suspension rope), 8…Shackle (connecting device), 10,10A~10F…Guide rail, 10a…Base, 10b…Protruding part, 11…Surface plate, 12…Wooden block

Claims

1. A lifting device used in pairs to hoist long components of an elevator or passenger conveyor, Each of the first parts has a first through hole as a suspension hole, and a pair of support members facing each other at a predetermined distance in the first direction, A lower clamping body is provided between the second parts of a pair of support members, and as the pair of support members rotate and displace around a first direction, it contacts the component from below. It comprises an upper clamping body provided between the third portion of a pair of support bodies, which contacts the component from above as the pair of support bodies rotate and displace around a first direction. Hanging equipment.

2. Of the lower and upper clamping bodies, at least the lower clamping body is detachably mounted on a pair of support bodies. The suspension device according to claim 1.

3. Each support has a second through-hole in the second portion. The lower clamping body is a columnar or tubular body whose ends are inserted into the second through-hole. The suspension device according to claim 2.

4. The lower clamping body comprises a shaft whose ends are inserted into the second through-holes, and a sleeve that is fitted onto the shaft between the second portions of a pair of support members. The suspension device according to claim 3.

5. A sleeve is a component in which the frictional resistance on the surface side is greater than the frictional resistance on the surface side of the shaft. The suspension device according to claim 4.

6. Both ends of the lower clamping body have portions that protrude outward from the second through-hole, and retaining members are detachably attached to these protruding portions. The suspension device according to any one of claims 3 to 5.

7. A lifting method for lifting a long component of an elevator or passenger conveyor placed on a spacer such as a wooden frame, using two lifting devices as a set according to any one of claims 2 to 5, Remove the lower clamping body from each lifting device. Lower each suspension device and place the components between the pair of supports through the opening at the bottom. The removed lower clamping body is positioned below the component and attached to each suspension device. The lifting mechanism lifts one set of lifting devices with the center of the lifting point between them, and the components are held between the lower clamping body and the upper clamping body while being lifted. Lifting method.

8. Multiple components placed side-by-side are then placed between a pair of supports in that position, and the components are lifted together in an aligned state. The lifting method according to claim 7.

Images