Method for replacing elevator pulleys and temporary support device for suspension system

Abstract

To provide an elevator pulley replacing method capable of reducing time and labor of pulley replacing work, and a suspension body temporary support device.SOLUTION: In this pulley replacing method, a suspension body temporary support device 31 is installed in a balance weight folding wheel beam 19. Then, a suspension body 24 is hooked in a pair of temporary support rollers 32 by moving the temporary support rollers 32 to a balance weight folding wheel 21 in a state where the temporary support rollers 32 are in contact with the suspension body 24. Then, a load from the suspension body 24 hooked in the balance weight folding wheel 21 is temporarily supported by the suspension body temporary support device 31.SELECTED DRAWING: Figure 2

Description

Technical Field

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[0001] The present disclosure relates to a method for replacing a pulley of an elevator and a temporary support device for a suspension body.

Background Art

[0002] In a conventional method for renovating a machine-roomless elevator, a counterweight return pulley is removed from an upper support. After that, a new hoisting machine is installed at the position where the counterweight return pulley was attached to the upper support (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional method for renovating a machine-roomless elevator as described above, when replacing the counterweight return pulley with a new hoisting machine, in order to reduce the load applied to the counterweight return pulley, the counterweight is supported by a buffer in the hoistway pit. Also, the load of the car is supported by a chain block. Therefore, operations for supporting the counterweight by the buffer and for suspending the car by the chain block are required, and the operation of replacing the counterweight return pulley with a new hoisting machine takes a considerable amount of labor.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain an elevator pulley replacement method and a suspension body temporary support device capable of reducing the labor of the pulley replacement work.

Means for Solving the Problems

[0006] The elevator pulley replacement method according to this disclosure includes the steps of: installing a suspension temporary support device, which has a pair of temporary support members and jacking devices for moving the pair of temporary support members, on a pulley mounting member to which an existing pulley is attached; moving the pair of temporary support members relative to the existing pulley while the pair of temporary support members are in contact with the suspension body, and placing the suspension body on the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the existing pulley with the suspension temporary support device; and removing the existing pulley from the pulley mounting member and attaching a new pulley to the pulley mounting member. The temporary suspension support device for an elevator according to this disclosure comprises a jacking device installed on a pulley mounting member to which a pulley is attached, and a pair of temporary support members attached to the jacking device. The jacking device is operated while installed on the pulley mounting member to move the pair of temporary support members relative to the pulley, thereby transferring the suspension that was on the pulley to the pair of temporary support members and temporarily supporting the load from the suspension that was on the pulley. [Effects of the Invention]

[0007] According to this disclosure, the effort required for replacing pulleys can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing an elevator according to Embodiment 1. [Figure 2] This is a front view showing the state of the counterweight return wheel in Figure 1 during replacement. [Figure 3] Figure 2 is a front view showing the mounting base. [Figure 4] Figure 3 is a side view showing the mounting base. [Figure 5] Figure 2 is a front view showing the moving jig. [Figure 6] Figure 5 is a side view showing the moving jig. [Figure 7] Figure 5 is a plan view showing the moving jig. [Figure 8] Figure 2 is a front view showing the stopper and guide. [Figure 9] It is a side view showing the stopper and guide of FIG. 8. [Figure 10] It is a plan view showing the stopper and guide of FIG. 9. [Figure 11] It is a front view showing a state where a pair of mounting bases are installed on the balance weight return car beam of FIG. 1. [Figure 12] It is a side view showing the main part of FIG. 11. [Figure 13] It is a front view showing a state where a moving jig is attached to each mounting base of FIG. 11. [Figure 14] It is a side view showing the main part of FIG. 13. [Figure 15] It is a front view showing a state where a temporary support member is attached to each moving jig of FIG. 13. [Figure 16] It is a side view showing the main part of FIG. 15. [Figure 17] It is a front view showing a state where a jack bolt is attached to each moving jig of FIG. 15. [Figure 18] It is a side view showing the main part of FIG. 17. [Figure 19] It is a front view showing a state where the moving jig of FIG. 17 is jacked up. <[ [Figure 20] It is a front view showing a state where the stopper and guide of FIG. 19 are passed through the second guide holding hole.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. FIG. 1 is a perspective view showing an elevator according to Embodiment 1. The elevator of Embodiment 1 is a machine roomless elevator with a 2:1 roping system. In FIG. 1, a car 12 and a balance weight 13 are provided in a hoistway 11. In FIG. 1, the hoistway 11, the car 12, and some devices are shown in a perspective view.

[0010] The counterweight 13 is disposed behind the car 12 as viewed from the landing side so as to face the back surface of the car 12 when it is located at the same height as the car 12.

[0011] In the hoistway 11, a first car guide rail 14a, a second car guide rail 14b, a first counterweight guide rail 15a, and a second counterweight guide rail 15b are installed.

[0012] The first car guide rail 14a and the second car guide rail 14b guide the ascent and descent of the car 12. The first counterweight guide rail 15a and the second counterweight guide rail 15b guide the ascent and descent of the counterweight 13.

[0013] An elevator hoisting machine 16 is installed at the lower part in the hoistway 11. The elevator hoisting machine 16 has a hoisting machine main body 16a and a driving wire rope sheave 16b.

[0014] The hoisting machine main body 16a has a hoisting machine motor (not shown) and a hoisting machine brake (not shown). The hoisting machine motor rotates the driving wire rope sheave 16b. The hoisting machine brake holds the driving wire rope sheave 16b in a stationary state. Further, the hoisting machine brake brakes the rotation of the driving wire rope sheave 16b.

[0015] An L-shaped return car beam 17 is installed at the top of the hoistway 11. The return car beam 17 is supported by the first car guide rail 14a, the first counterweight guide rail 15a, and the second counterweight guide rail 15b.

[0016] Further, the return car beam 17 has a car return car beam 18 and a counterweight return car beam 19. The counterweight return car beam 19 is connected at a right angle to one end of the car return car beam 18.

[0017] A first car return car 20a and a second car return car 20b are attached to the car return car beam 18. A counterweight return car 21 is attached to the counterweight return car beam 19.

[0018] A first cage suspension wheel 22a and a second cage suspension wheel 22b are provided at the bottom of the cage 12. A counterweight suspension wheel 23 is provided at the top of the counterweight 13.

[0019] The elevator of Embodiment 1 has a plurality of pulleys, including a drive sheave 16b, a first car return wheel 20a, a second car return wheel 20b, a counterweight return wheel 21, a first car suspension wheel 22a, a second car suspension wheel 22b, and a counterweight suspension wheel 23.

[0020] The cage 12 and counterweight 13 are suspended within the elevator shaft 11 by a suspension system 24. The suspension system 24 can consist of multiple ropes or multiple belts.

[0021] A rope-stopping beam 25 is horizontally fixed between the upper end of the second car guide rail 14b and the upper end of the second counterweight guide rail 15b. The rope-stopping beam 25 is provided with a car-side rope-stopping section (not shown). The counterweight return beam 19 is provided with a counterweight-side rope-stopping section 26.

[0022] The suspension body 24 has a first end and a second end. The first end is connected to the cage-side rope fastening section. The second end is connected to the counterweight-side rope fastening section 26.

[0023] Furthermore, the suspension body 24 is wrapped around the first cage suspension wheel 22a, the second cage suspension wheel 22b, the first cage return wheel 20a, the second cage return wheel 20b, the drive sheave 16b, the counterweight return wheel 21, and the counterweight suspension wheel 23, in that order from the first end side.

[0024] The cage 12 and the counterweight 13 move up and down within the elevator shaft 11 by rotating the drive sheave 16b.

[0025] An elevator control device 27 is installed in the lower part of the hoistway 11. The elevator control device 27 controls the operation of the elevator car 12 by controlling the elevator hoisting machine 16.

[0026] Figure 2 is a front view showing the state in which the counterweight return wheel 21 of Figure 1 is being replaced. The pulley in Embodiment 1 is the counterweight return wheel 21. The pulley mounting member in Embodiment 1 is the counterweight return wheel beam 19.

[0027] When the counterweight return wheel 21 is replaced, a temporary suspension support device 31 is installed on the counterweight return wheel beam 19. After the counterweight return wheel 21 is replaced, the temporary suspension support device 31 is removed from the counterweight return wheel beam 19.

[0028] The suspension temporary support device 31 includes a pair of temporary support rollers 32 as a pair of temporary support members and a jacking device 33. The suspension body 24 is resting on the pair of temporary support rollers 32. The jacking device 33 is operated by an operator to move the pair of temporary support rollers 32 relative to the counterweight return wheel 21, thereby transferring the suspension body 24 from the counterweight return wheel 21 to the pair of temporary support rollers 32. In this way, the jacking device 33 temporarily supports the load from the suspension body 24 that was resting on the counterweight return wheel 21.

[0029] Each temporary support roller 32 is a component that comes into contact with the suspension body 24. Therefore, in order to avoid damaging the suspension body 24, at least the portion of the outer surface of each temporary support roller 32 that comes into contact with the suspension body 24 is curved.

[0030] Furthermore, since the suspension body 24 only contacts each temporary support roller 32 during the replacement of the counterweight return wheel 21, the radius of curvature of the curved surface of each temporary support roller 32 may be smaller than the radius of curvature required for the pulleys that are always included in the elevator. For this reason, the radius of curvature of the curved surface of each temporary support roller 32 is smaller than the radius of curvature of the pulley being replaced, in this case the radius of curvature of the counterweight return wheel 21.

[0031] The outer shape of each temporary support roller 32 in Embodiment 1 is cylindrical. The axis of each temporary support roller 32 is parallel and horizontal to the axis of rotation of the counterweight return wheel 21.

[0032] The jacking device 33 has a pair of jack bodies 34. The pair of jack bodies 34 have the same configuration as each other. The pair of jack bodies 34 are installed on the counterweight return wheel beam 19 symmetrically on either side of the counterweight return wheel 21.

[0033] Each jack body 34 has a mounting base 41, a moving jig 42, a plurality of auxiliary stoppers 43, a stopper / guide 44, and a jack bolt 45.

[0034] In Embodiment 1, a pair of stopper bolts or a pair of stopper pins are used as the multiple auxiliary stoppers 43. However, Figure 2 shows a state in which the multiple auxiliary stoppers 43 are not mounted on the mounting base 41. Figure 20 shows a state in which the multiple auxiliary stoppers 43 are mounted on the mounting base 41.

[0035] The mounting base 41 is fixed to the counterweight return beam 19 by a plurality of fasteners (not shown). Bolts are used as fasteners, for example.

[0036] Figure 3 is a front view showing the mounting base 41 of Figure 2. Figure 4 is a side view showing the mounting base 41 of Figure 3. The mounting base 41 has a pair of flat plate-shaped fixing parts 41a and a pair of flat plate-shaped holding parts 41b.

[0037] Each fixing portion 41a is fixed to the upper surface of the counterweight return beam 19. Each holding portion 41b protrudes perpendicularly from the end of the fixing portion 41a.

[0038] The pair of retaining parts 41b face each other. Furthermore, the pair of retaining parts 41b are parallel to each other. The pair of retaining parts 41b are provided with a first guide retaining hole 41c, a second guide retaining hole 41d, a first stopper retaining hole 41e, and a second stopper retaining hole 41f.

[0039] A stopper / guide 44 is selectively passed through the first guide retaining hole 41c and the second guide retaining hole 41d. The stopper / guide 44 is detachable from the mounting base 41. The shape of the first guide retaining hole 41c and the shape of the second guide retaining hole 41d are both rectangular. The size of the first guide retaining hole 41c is the same as the size of the second guide retaining hole 41d.

[0040] Furthermore, the second guide retaining hole 41d is located further away from the fixing portion 41a than the first guide retaining hole 41c. That is, when the mounting base 41 is installed on the counterweight return beam 19, the second guide retaining hole 41d is located further away from the counterweight return beam 19 than the first guide retaining hole 41c.

[0041] The centerlines of the first guide retaining hole 41c and the second guide retaining hole 41d coincide on the same straight line L1. When the fixing part 41a is fixed to the horizontal plane, the straight line L1 is inclined with respect to the horizontal plane.

[0042] An auxiliary stopper 43 is passed through the first stopper holding hole 41e and the second stopper holding hole 41f, respectively. That is, the first stopper holding hole 41e and the second stopper holding hole 41f are stopper holding holes on the mounting base side, respectively.

[0043] The shape of the first stopper retaining hole 41e and the shape of the second stopper retaining hole 41f are both circular. The size of the second stopper retaining hole 41f is the same as the size of the first stopper retaining hole 41e.

[0044] The first stopper retaining hole 41e is located next to the first guide retaining hole 41c. The second stopper retaining hole 41f is located next to the second guide retaining hole 41d, on the opposite side of the straight line L1 from the first stopper retaining hole 41e.

[0045] Returning to Figure 2, in each jack body 34, the moving jig 42 is positioned between a pair of holding parts 41b. The moving jig 42 is also supported by the mounting base 41 via a stopper / guide 44.

[0046] Figure 5 is a front view showing the moving jig 42 of Figure 2. Figure 6 is a side view showing the moving jig 42 of Figure 5. Figure 7 is a top view showing the moving jig 42 of Figure 5.

[0047] The moving jig 42 has a pair of flat slit plates 42a and a connecting member 42b. The pair of slit plates 42a face each other. Also, the pair of slit plates 42a are parallel to each other. The connecting member 42b connects the pair of slit plates 42a at one end in the longitudinal direction of the pair of slit plates 42a.

[0048] The pair of slit plates 42a are provided with a temporary support member mounting hole 42c, a slit 42d, a third stopper holding hole 42e, and a fourth stopper holding hole 42f.

[0049] The temporary support member mounting holes 42c are provided at the other end of the pair of slit plates 42a in the longitudinal direction. A temporary support roller 32 is attached to the temporary support member mounting holes 42c.

[0050] A stopper / guide 44 passes through the slit 42d. The shape of the slit 42d is rectangular. The longer side of the slit 42d is parallel to the longitudinal direction of the pair of slit plates 42a.

[0051] Auxiliary stoppers 43 are passed through the third stopper holding hole 42e and the fourth stopper holding hole 42f, respectively. In other words, the third stopper holding hole 42e and the fourth stopper holding hole 42f are jig-side stopper holding holes.

[0052] The shape of the third stopper retaining hole 42e and the shape of the fourth stopper retaining hole 42f are both circular. The size of the third stopper retaining hole 42e and the size of the fourth stopper retaining hole 42f are the same as the size of the first stopper retaining hole 41e.

[0053] The third stopper retaining hole 42e is located closer to the temporary support member mounting hole 42c than the fourth stopper retaining hole 42f. The fourth stopper retaining hole 42f is located closer to the connecting member 42b than the third stopper retaining hole 42e. Also, the fourth stopper retaining hole 42f is located on the opposite side of the slit 42d from the third stopper retaining hole 42e.

[0054] The connecting member 42b is provided with a screw hole 42g. A jack bolt 45 is screwed into the screw hole 42g.

[0055] In Figure 2, the stopper / guide 44 is passed through the second guide holding hole 41d and the slit 42d. The tip of the jack bolt 45 is in contact with the stopper / guide 44.

[0056] Figure 8 is a front view showing the stopper / guide 44 of Figure 2. Figure 9 is a side view showing the stopper / guide 44 of Figure 8. Figure 10 is a top view showing the stopper / guide 44 of Figure 9.

[0057] The stopper / guide 44 has a main guide portion 44a and a pair of guide protrusions 44b. The main guide portion 44a is shaped like a rectangular parallelepiped. The pair of guide protrusions 44b project from the same surface of the main guide portion 44a in the same direction. A groove 44c is formed between the pair of guide protrusions 44b.

[0058] When the stopper / guide 44 is installed on the mounting base 41, the pair of guide projections 44b are located on the outside of the mounting base 41 and are hooked onto the edge of the first guide retaining hole 41c or the second guide retaining hole 41d. That is, the edge of the first guide retaining hole 41c or the second guide retaining hole 41d is inserted into the groove 44c.

[0059] This prevents the stopper / guide 44 from shifting in the insertion direction when it is mounted on the mounting base 41.

[0060] Furthermore, the cross-sectional shape of the portion of the stopper / guide 44 that passes through the first guide holding hole 41c or the second guide holding hole 41d is a shape other than circular, in this case rectangular. Therefore, the rotation of the moving jig 42 due to the load from the suspension body 24 is prevented by the stopper / guide 44.

[0061] Next, we will explain how to replace the counterweight return wheel 21. When replacing the counterweight return wheel 21, a pair of jack bodies 34 are installed on the counterweight return wheel beam 19. Since the installation procedure for the pair of jack bodies 34 is the same for both, we will explain the installation procedure for one of the jack bodies 34.

[0062] When installing the jack body 34 on the counterweight return beam 19, the mounting base 41 is first fixed to the counterweight return beam 19 as shown in Figures 11 and 12. Note that in Figure 12, the rotation axis of the counterweight return wheel 21 and the parts supporting the rotation axis are omitted.

[0063] Next, as shown in Figures 13 and 14, a moving jig 42 is positioned between a pair of holding parts 41b, and a stopper / guide 44 is attached to the mounting base 41 and the moving jig 42.

[0064] At this time, the stopper / guide 44 is passed through the first guide holding hole 41c and the slit 42d, thereby supporting the moving jig 42 on the mounting base 41 via the stopper / guide 44.

[0065] Furthermore, when viewed from the front, the moving jig 42 intersects the counterweight return beam 19 at an angle. Also, when viewed from the front, the moving jig 42 intersects the suspension body 24 at an angle.

[0066] Subsequently, as shown in Figures 15 and 16, a temporary support roller 32 is attached to the lower end of the moving jig 42. The temporary support roller 32 is attached to the moving jig 42, for example, by bolts.

[0067] In this state, the pair of temporary support rollers 32 are positioned directly below the counterweight return wheel 21. That is, the pair of temporary support rollers 32 face the portion of the outer surface of the counterweight return wheel 21 that is not wrapped around the suspension body 24.

[0068] Subsequently, as shown in Figures 17 and 18, the jack bolt 45 is screwed into the screw hole 42g, and the tip of the jack bolt 45 is pressed against the stopper / guide 44. As a result, the moving jig 42 and the temporary support roller 32 are lifted up, and the temporary support roller 32 comes into contact with the suspension body 24. At this point, no load from the suspension body 24 is acting on the temporary support roller 32.

[0069] Next, as the jack bolt 45 is screwed in further, the temporary support roller 32 is jacked up together with the moving jig 42, as shown in Figure 19, and the suspension body 24 is pulled away from the counterweight return wheel 21. In other words, the contact length of the suspension body 24 with respect to the counterweight return wheel 21 is reduced.

[0070] In this way, as the jack bolt 45 is screwed in with its tip in contact with the stopper / guide 44, the stopper / guide 44 moves relative to the slit 42d. Also, the moving jig 42 and the temporary support roller 32 move diagonally upward relative to the mounting base 41.

[0071] The moving jig 42 is jacked up until the third stopper holding hole 42e overlaps with the first stopper holding hole 41e and the fourth stopper holding hole 42f overlaps with the second stopper holding hole 41f.

[0072] The jacking operation may be performed gradually and alternately on the pair of jack bodies 34. Alternatively, the jacking operation on one jack body 34 may be performed after the other jack body 34 has been completed. Furthermore, using a power tool, such as an impact driver, during the jacking operation can shorten the working time.

[0073] Subsequently, as shown in Figure 20, the auxiliary stoppers 43 are passed through the first stopper holding hole 41e and the third stopper holding hole 42e. The auxiliary stoppers 43 are also passed through the second stopper holding hole 41f and the fourth stopper holding hole 42f.

[0074] Furthermore, the jack bolt 45 is removed from the moving jig 42, and the stopper / guide 44 is removed from the mounting base 41 and the moving jig 42. Then, the stopper / guide 44 is passed through the second guide holding hole 41d and the slit 42d.

[0075] When two auxiliary stoppers 43 are attached to the mounting base 41 and the moving jig 42, the moving jig 42 is supported by the mounting base 41 via the two auxiliary stoppers 43 even if the stopper / guide 44 is removed from the mounting base 41 and the moving jig 42. This makes it possible to change the mounting position of the stopper / guide 44 from the first guide holding hole 41c to the second guide holding hole 41d.

[0076] With the stopper / guide 44 removed from the mounting base 41 and the moving jig 42, the load from the suspension body 24 is transmitted to the mounting base 41 via the temporary support roller 32, the moving jig 42, and the two auxiliary stoppers 43.

[0077] After the mounting position of the stopper / guide 44 is changed, the two auxiliary stoppers 43 are removed from the mounting base 41 and the moving jig 42. As a result, the moving jig 42 is once again supported on the mounting base 41 via the stopper / guide 44.

[0078] Next, the jack bolt 45 is screwed into the screw hole 42g, and the second jacking-up is performed. As a result, the suspension body 24 is pulled further away from the counterweight return beam 19, resulting in the state shown in Figure 2.

[0079] In the state shown in Figure 2, the height of the upper ends of the pair of temporary support rollers 32 reaches the height of the upper end of the counterweight return wheel 21. Therefore, the load from the suspension body 24 acts on the counterweight return wheel 21 with little to no effect.

[0080] In this state, the counterweight return wheel 21 is removed from the counterweight return wheel beam 19, and a new pulley is attached to the counterweight return wheel beam 19. Then, by the reverse procedure described above, the suspension body 24 is wrapped around the new pulley.

[0081] A new pulley is, for example, a new counterweight return pulley. Also, in elevator renovation work, if a new hoisting machine is installed in the position of the counterweight return pulley 21, the new pulley is a new drive sheave for the new hoisting machine.

[0082] Thus, the pulley replacement method of Embodiment 1 includes an installation step, a temporary support step, and a replacement step. In the installation step, the suspension temporary support device 31 is installed on the counterweight return beam 19.

[0083] In the temporary support process, the pair of temporary support rollers 32 are moved relative to the counterweight return wheel 21 while the pair of temporary support rollers 32 are in contact with the suspension body 24, thereby placing the suspension body 24 on the pair of temporary support rollers 32. The load from the suspension body 24 that was on the counterweight return wheel 21 is then temporarily supported by the suspension body temporary support device 31.

[0084] In the replacement process, the counterweight return wheel 21 is removed from the counterweight return wheel beam 19, and a new pulley is attached to the counterweight return wheel beam 19.

[0085] In this elevator pulley replacement method and suspension temporary support device 31, the load from the suspension body 24 that was on the counterweight return wheel 21 is temporarily supported by the suspension temporary support device 31. Therefore, the work of supporting the counterweight 13 with a buffer and the work of lifting the car 12 with a chain block are eliminated, and the effort required for replacing the counterweight return wheel 21 can be reduced.

[0086] Furthermore, at least the portion of the outer surface of each temporary support roller 32 that contacts the suspension body 24 is curved. This helps to suppress damage to the suspension body 24.

[0087] Furthermore, the radius of curvature of the curved surface at each temporary support roller 32 is smaller than the radius of curvature of the counterweight return wheel 21. Therefore, the suspension temporary support device 31 can be made smaller and lighter.

[0088] Furthermore, in each jack body 34, the stopper / guide 44 is passed through the first guide holding hole 41c and the slit 42d, thereby supporting the moving jig 42 on the mounting base 41 via the stopper / guide 44. Then, with the tip of the jack bolt 45 in contact with the stopper / guide 44, the jack bolt 45 is screwed in. As a result, the stopper / guide 44 moves relative to the slit 42d, and the moving jig 42 and the temporary support roller 32 move relative to the mounting base 41.

[0089] Therefore, with a simple configuration, the suspension body 24 can be easily switched from the counterweight return wheel 21 to a pair of temporary support rollers 32.

[0090] Furthermore, in each jack body 34, the rotation of the moving jig 42 due to the load from the suspension body 24 is prevented by the stopper / guide 44. As a result, the suspension body 24 can be stably transferred from the counterweight return wheel 21 to the pair of temporary support rollers 32.

[0091] Furthermore, each stopper / guide 44 has a groove 44c into which the edge of the first guide holding hole 41c is inserted. This prevents the stopper / guide 44 from shifting in the insertion direction, and allows the moving jig 42 and the temporary support roller 32 to move stably with a simple configuration.

[0092] Furthermore, each mounting base 41 is provided with a second guide holding hole 41d. This allows the stopper / guide 44 to be replaced with the second guide holding hole 41d during the process of separating the suspension body 24 from the counterweight return wheel 21. This enables the suspension body 24 to be separated from the counterweight return wheel 21 in stages, reducing the length of the moving jig 42 relative to the distance the temporary support roller 32 is moved. It also reduces the required workspace.

[0093] Furthermore, when two auxiliary stoppers 43 are attached to the mounting base 41 and the moving jig 42, the moving jig 42 is supported by the mounting base 41 via the two auxiliary stoppers 43, even when the stopper / guide 44 is removed from the mounting base 41 and the moving jig 42. Therefore, the mounting position of the stopper / guide 44 can be easily changed from the first guide holding hole 41c to the second guide holding hole 41d.

[0094] Furthermore, the number of auxiliary stoppers 43 in each jack body 34 may be one or three or more. For example, if the cross-sectional shape of the auxiliary stopper 43 is elliptical, polygonal, or the like, one auxiliary stopper 43 can prevent the rotation of the moving jig 42 while supporting the moving jig 42 on the mounting base 41.

[0095] Furthermore, each temporary support member is not limited to the temporary support roller 32. That is, the shape of each temporary support member is not limited to a cylindrical shape, and may have a curved surface only in the portion that contacts the suspension body 24.

[0096] Furthermore, the pulleys may be, for example, a drive sheave 16b, a first car return wheel 20a, a second car return wheel 20b, a first car suspension wheel 22a, a second car suspension wheel 22b, or a counterweight suspension wheel 23.

[0097] Furthermore, in Embodiment 1, a pair of temporary support rollers 32 are pulled up relative to the counterweight return wheel 21. However, depending on the position of the pulley relative to the pulley mounting member, the position of the suspension temporary support device relative to the pulley mounting member, etc., the pair of temporary support members may be pushed up, pulled down, or pushed down relative to the pulley.

[0098] Furthermore, in Embodiment 1, a pair of jack bodies 34 are used for a pair of temporary support rollers 32, but the jack device may be configured such that the pair of temporary support rollers 32 move simultaneously by operating a single jack bolt.

[0099] Furthermore, the elevator layout is not limited to the layout shown in Figure 1. For example, the elevator hoisting machine 16 may be installed at the top of the hoistway 11. Also, the counterweight 13 may be positioned to the side of the car 12 as viewed from the landing.

[0100] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0101] The various aspects of this disclosure are summarized below as an appendix.

[0102] (Note 1) A step of installing a temporary suspension support device, which has a pair of temporary support members and jacking devices for moving each of the pair of temporary support members, on a pulley mounting member to which an existing pulley is attached, The process of moving the pair of temporary support members relative to the existing pulley while the pair of temporary support members are in contact with the suspension body, and hanging the suspension body on the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the existing pulley with the suspension body temporary support device, and The process of removing the existing pulley from the pulley mounting member and attaching the new pulley to the pulley mounting member. A method for replacing elevator pulleys, including [specific details omitted]. (Note 2) A jacking device installed on a pulley mounting member to which a pulley is attached, and A pair of temporary support members attached to the jacking device. Equipped with, The jacking device is operated while installed on the pulley mounting member to move the pair of temporary support members relative to the pulley, thereby transferring the suspension body that was suspended on the pulley to the pair of temporary support members, and temporarily supporting the load from the suspension body that was on the pulley, for an elevator suspension body. (Note 3) The temporary support device for an elevator suspension body as described in Appendix 2, wherein at least the portion of the outer surface of each temporary support member that is in contact with the suspension body is curved. (Note 4) The temporary support device for the elevator suspension described in Appendix 3, wherein the radius of curvature of the curved surface is smaller than the radius of curvature of the pulley. (Note 5) The jacking device has a pair of jack bodies, Each of the jack bodies is, A first guide holding hole is provided, and a mounting base is fixed to the pulley mounting member, A moving jig is provided with a slit and a screw hole, to which the temporary support member is attached, A stopper and guide that passes through the first guide holding hole and the slit, A jack bolt that is screwed into the aforementioned screw hole and It has, The stopper and guide are passed through the first guide holding hole and the slit, thereby the moving jig is supported on the mounting base via the stopper and guide. An elevator suspension temporary support device according to any one of the appendices 2 to 4, wherein the jack bolt is screwed in while the tip of the jack bolt is in contact with the stopper / guide, causing the stopper / guide to move relative to the slit, and the moving jig and the temporary support member to move relative to the mounting base. (Note 6) The temporary support device for the elevator suspension described in Appendix 5, wherein the rotation of the moving jig due to the load from the suspension is prevented by the stopper and guide. (Note 7) The temporary support device for the elevator suspension body according to Appendix 5 or Appendix 6, wherein the stopper and guide has a groove formed into which the edge of the first guide holding hole is inserted. (Note 8) The mounting base is provided with a second guide holding hole through which the stopper and guide passes. The temporary support device for an elevator suspension according to any one of the appendices 5 to 7, wherein the second guide holding hole is located at a position further away from the pulley mounting member than the first guide holding hole when the mounting base is installed on the pulley mounting member. (Note 9) Each of the jack bodies further has an auxiliary stopper, The mounting base is provided with a mounting base side stopper holding hole, The aforementioned moving jig is provided with a jig-side stopper holding hole, The temporary support device for an elevator suspension as described in Appendix 8, wherein the auxiliary stopper is passed through the mounting base side stopper and the jig side stopper holding hole, so that even when the stopper and guide are removed from the mounting base and the moving jig, the moving jig is supported on the mounting base via the auxiliary stopper. [Explanation of symbols]

[0103] 19 Counterweight return wheel beam (pulley mounting member), 21 Counterweight return wheel (existing pulley), 24 Suspension body, 31 Suspension body temporary support device, 32 Temporary support roller (temporary support member), 33 Jack device, 34 Jack body, 41 Mounting base, 41c First guide holding hole, 41d Second guide holding hole, 41e First stopper holding hole (mounting base side stopper holding hole), 41f Second stopper holding hole (mounting base side stopper holding hole), 42 Moving jig, 42d Slit, 42e Third stopper holding hole (jig side stopper holding hole), 42f Fourth stopper holding hole (jig side stopper holding hole), 42g Screw hole, 43 Auxiliary stopper, 44 Stopper and guide, 44c Groove, 45 Jack bolt.

Claims

1. A step of installing a temporary suspension support device, which has a pair of temporary support members and jacking devices for moving each of the pair of temporary support members, on a pulley mounting member to which an existing pulley is attached, The process of moving the pair of temporary support members relative to the existing pulley while the pair of temporary support members are in contact with the suspension body, and hanging the suspension body on the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the existing pulley with the suspension body temporary support device, and The process of removing the existing pulley from the pulley mounting member and attaching the new pulley to the pulley mounting member. A method for replacing elevator pulleys, including [specific details omitted].

2. A jacking device installed on a pulley mounting member to which a pulley is attached, and A pair of temporary support members attached to the jacking device. Equipped with, The jacking device, when operated while installed on the pulley mounting member, moves the pair of temporary support members relative to the pulley, and shifts the suspension body that was on the pulley to the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the pulley. An elevator suspension temporary support device in which at least the portion of the outer surface of each temporary support member that is in contact with the suspension body is curved.

3. The temporary support device for an elevator suspension according to claim 2, wherein the radius of curvature of the curved surface is smaller than the radius of curvature of the pulley.

4. A jacking device installed on a pulley mounting member to which a pulley is attached, and A pair of temporary support members attached to the jacking device. Equipped with, The jacking device, when operated while installed on the pulley mounting member, moves the pair of temporary support members relative to the pulley, and shifts the suspension body that was on the pulley to the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the pulley. The jacking device has a pair of jack bodies, Each of the jack bodies is, A first guide holding hole is provided, and a mounting base is fixed to the pulley mounting member, A moving jig is provided with a slit and a screw hole, to which the temporary support member is attached, A stopper and guide that passes through the first guide holding hole and the slit, A jack bolt that is screwed into the aforementioned screw hole and It has, The stopper and guide are passed through the first guide holding hole and the slit, thereby supporting the moving jig on the mounting base via the stopper and guide. An elevator suspension temporary support device in which, when the jack bolt is screwed in with the tip of the jack bolt in contact with the stopper / guide, the stopper / guide moves relative to the slit, and the moving jig and the temporary support member move relative to the mounting base.

5. The temporary support device for an elevator suspension according to claim 4, wherein the rotation of the moving jig due to the load from the suspension is prevented by the stopper and guide.

6. The temporary support device for an elevator suspension body according to claim 4, wherein the stopper and guide has a groove formed in which the edge of the first guide holding hole is inserted.

7. The mounting base is provided with a second guide holding hole through which the stopper and guide passes. The temporary support device for an elevator suspension according to claim 4, wherein the second guide holding hole is located at a position further away from the pulley mounting member than the first guide holding hole when the mounting base is installed on the pulley mounting member.

8. Each of the jack bodies further has an auxiliary stopper, The mounting base is provided with a mounting base side stopper holding hole, The aforementioned moving jig is provided with a jig-side stopper holding hole, The temporary support device for an elevator suspension according to claim 7, wherein the auxiliary stopper is passed through the stopper holding hole on the mounting base side and the stopper holding hole on the jig side, so that even when the stopper and guide are removed from the mounting base and the moving jig, the moving jig is supported on the mounting base via the auxiliary stopper.

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