Extraction aid

Abstract

To provide a pulling-out auxiliary tool that can pull out a pulley and a flywheel while preventing the flywheel from being scratched.SOLUTION: A pulling-out auxiliary tool, which is used together with a puller in order to pull out in a pulling-out direction a pulley of a driving machine of an escalator and a flywheel fixed to the pulley from a rotary shaft body of the driving machine, comprises: a contacting part that contacts an inside surface pointing in an opposite direction of the pulling-out direction of the flywheel; an extending part that extends to the outside of an outer periphery part of the flywheel, from the contacting part toward the outer periphery part; and a pair of acting parts positioned at both side across the rotary shaft body at an end part closer to the outside than the outer periphery part in the extending part and formed so that a pair of claws of the puller are hung on the parts respectively.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a pulley and flywheel extraction aid for an escalator drive machine. [Background technology]

[0002] Patent Document 1 discloses a puller that is a tool for pulling out a pulley. According to Patent Document 1, it is possible to pull out a pulley press-fitted onto a rotating shaft from the rotating shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-000780 Summary of the Invention [Problem to be solved by the invention]

[0004] The puller described in Patent Document 1 can also be applied to a pulley fixed to a flywheel. In this case, the pulley's claws are hooked onto the flywheel, which has a larger diameter than the pulley. However, the claws of the puller described in Patent Document 1 apply a large force to the outer periphery of the flywheel, which may cause damage to the flywheel.

[0005] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide an extraction aid that can extract a pulley and a flywheel while suppressing damage to the flywheel. [Means for solving the problem]

[0006] The extraction aid according to the present disclosure is an extraction aid used together with a puller to extract the pulley of an escalator drive machine and the flywheel fixed to the pulley from the rotating shaft of the drive machine in the extraction direction, and Pulling outa contact portion that contacts the inner surface facing the opposite direction to the rotation direction; an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward from the outer periphery; and a pair of action portions that are present on both sides of the rotating shaft at the end of the extension portion that is outward from the outer periphery and are formed so that a pair of claws of the puller can be respectively hooked thereon. The area of ​​the contact part is larger than the area of ​​the hook part of the pair of claws of the puller. . In addition, the extraction aid of the present disclosure is an extraction aid used together with a puller to extract the pulley of an escalator driver and the flywheel fixed to the pulley from the rotating shaft of the driver in the extraction direction, and is equipped with a contact portion that contacts the inner surface facing opposite to the extraction direction of the flywheel, an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward beyond the outer periphery, and a pair of action portions that are located on both sides of the rotating shaft at the end of the extension portion that is outer than the outer periphery and are formed so that a pair of claws of the puller can be respectively hooked onto the contact portion, and the contact portion contacts the flywheel at a position within a specified first distance from the rotating shaft. In addition, the extraction aid according to the present disclosure is an extraction aid used together with a puller to extract the pulley of an escalator drive machine and the flywheel fixed to the pulley in the extraction direction from the rotating shaft of the drive machine, and comprises a contact portion that contacts the inner surface of the flywheel facing away from the extraction direction, an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward beyond the outer periphery, and a pair of action portions that are located on both sides of the rotating shaft at the end of the extension portion that is outer than the outer periphery and are formed so that a pair of claws of the puller can be respectively hooked onto the contact portion, and the contact portion has a magnet inside. The pull-out aid according to the present disclosure is used together with a puller to pull out the pulley of an escalator drive machine and the flywheel fixed to the pulley in the pull-out direction from the rotating shaft of the drive machine, and includes a contact portion that contacts the inner surface of the flywheel facing away from the pull-out direction, an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward from the outer periphery, and a pair of claws on each end of the extension portion that are located on both sides of the rotating shaft and are formed so that a pair of claws of the puller can be hooked on. The device comprises a pair of acting parts, a plurality of contact bodies that constitute the contact part, a pair of rod-shaped extension bodies that are longer than the diameter of the flywheel, each connected to one or more of the plurality of contact bodies, and arranged side by side with their longitudinal directions facing in the same direction so that the rotating shaft body is located between them to constitute the extension part, one acting body that connects one end of one of the pair of extension bodies to one end of the other of the pair of extension bodies to constitute one of the pair of acting parts, and the other acting body that connects the other end of one of the pair of extension bodies to the other end of the other of the pair of extension bodies to constitute the other of the pair of acting parts. The extraction aid according to the present disclosure is an extraction aid used together with a puller to extract the pulley of an escalator drive machine and the flywheel fixed to the pulley in the extraction direction from the rotating shaft of the drive machine, and comprises a contact portion that contacts the inner surface of the flywheel that faces away from the extraction direction, an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward beyond the outer periphery, and a pair of action portions that are located on both sides of the rotating shaft at the end of the extension portion that is outward beyond the outer periphery and are formed so that a pair of claws of the puller can be hooked onto each of them. The contact portion is a portion of the pair of extension bodies that is rod-shaped and longer than the diameter of the flywheel, arranged with their longitudinal directions facing in the same direction so that the rotating shaft body is located between them, and that contact the inner surface of the flywheel at their respective centers to form an extension portion; one acting body that connects one end of one of the pair of extension bodies to one end of the other of the pair of extension bodies to form one of the pair of acting portions; and the other acting body that connects the other end of one of the pair of extension bodies to the other end of the other of the pair of extension bodies to form the other of the pair of acting portions, and the contact portion is the portion of the pair of extension bodies that contacts the inner surface. The extraction aid according to the present disclosure is an extraction aid used together with a puller to extract the pulley of an escalator drive machine and the flywheel fixed to the pulley from the rotating shaft of the drive machine in the extraction direction, and comprises a contact portion that contacts the inner surface of the flywheel that faces away from the extraction direction, an extension portion that extends from the contact portion toward the outer periphery of the flywheel and outward from the outer periphery, a pair of action portions that are present on both sides of the rotating shaft at the end of the extension portion that is outward from the outer periphery and are formed so that a pair of claws of the puller can be respectively hooked onto the action portions, and a rod-shaped element with its longitudinal direction facing in the same direction so that the rotating shaft is located between the action portions. the pair of contact bodies arranged side by side to form a contact portion; a first connecting body connecting one end of each of the pair of contact bodies; a second connecting body connecting the other end of each of the pair of contact bodies; one extension body having a rod shape, one end fixed to one of the pair of contact bodies and the other end extending outward from the outer periphery toward the outer periphery of the flywheel to form an extension portion; and the other extension body having a rod shape, one end fixed to the other of the pair of contact bodies and the other end extending outward from the outer periphery toward the outer periphery of the flywheel to form an extension portion, wherein one of the pair of working portions is the other end of one of the extension bodies and the other of the pair of working portions is the other end of the other extension body. [Effects of the Invention]

[0007] According to the present disclosure, the claws of the puller do not come into contact with the flywheel, which prevents the flywheel from being damaged when the pulley and flywheel are pulled out. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of an escalator to which a pulling unit according to a first embodiment is applied. [Figure 2] 1 is a side view of a driving machine of an escalator to which a pulling unit according to a first embodiment is applied. FIG. [Figure 3] 1 is a top view of a main part of a driving machine of an escalator to which a pulling unit according to a first embodiment is applied. FIG. [Figure 4] FIG. 2 is a side view of the extraction unit according to the first embodiment. [Figure 5] FIG. 2 is a side view of the extraction unit according to the first embodiment. [Figure 6] 1 is a side view of a main part of a driving machine when an extracting aid of an extracting unit according to the first embodiment is not used. FIG. [Figure 7] FIG. 11 is a side view of a main part of a driving machine to which a pulling unit according to a second embodiment is applied. [Figure 8]FIG. 10 is a perspective view of a main part of a driving machine to which a pulling unit according to a second embodiment is applied. [Figure 9] 10 is a top view of the main part of a driving machine to which a pulling unit according to a second embodiment is applied, and the pulling unit. FIG. [Figure 10] FIG. 10 is a side view of the extraction unit according to the second embodiment. [Figure 11] FIG. 11 is a side view of the extraction unit according to the third embodiment. [Figure 12] FIG. 11 is a side view of the extraction unit according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals. Duplicate descriptions of these parts will be appropriately simplified or omitted.

[0010] Embodiment 1 Fig. 1 is a schematic diagram of an escalator to which a removal unit according to embodiment 1 is applied. Fig. 2 is a side view of a drive machine of an escalator to which a removal unit according to embodiment 1 is applied. Fig. 3 is a top view of a main part of a drive machine of an escalator to which a removal unit according to embodiment 1 is applied.

[0011] FIG. 1 shows an escalator 1. The escalator 1 is installed between an upper floor and a lower floor of a building (not shown). The escalator 1 transports passengers between the upper and lower floors. The escalator 1 includes a first entrance 2a, a second entrance 2b, a main frame 3, a plurality of steps 4, a step sprocket 5, a step chain 6, and a driver 7.

[0012] The first entrance / exit 2a is provided on an upper floor of the building. The second entrance / exit 2b is provided on a lower floor of the building. Passengers use the escalator 1 by passing through the first entrance / exit 2a and the second entrance / exit 2b. The main frame 3 spans between the first entrance / exit 2a and the second entrance / exit 2b. The main frame 3 has a machine room 3a at its upper end. The machine room 3a is provided below the first entrance / exit 2a. The multiple steps 4 are all connected in an endless manner. The multiple steps 4 are arranged between the first entrance / exit 2a and the second entrance / exit 2b. The step sprocket 5 is provided in the machine room 3a. The step chain 6 is an endless chain. The step chain 6 connects the multiple steps 4. A portion of the step chain 6 is wound around the step sprocket 5.

[0013] The driving machine 7 drives the step sprocket 5 to move the steps 4. The driving machine 7 includes a reducer 8, a V-belt 9, and a driving motor 10. The reducer 8 includes an input shaft 8a, a gear unit 8b, an output shaft 8c, and a brake 8d. The input shaft 8a includes a pulley with a radius L1. As the pulley rotates, the input shaft 8a receives an input rotational driving force. The gear unit 8b converts the rotational driving force received by the input shaft 8a into a rotational driving force having the same or a different rotation speed and the same or a different torque. The output shaft 8c outputs the rotational driving force converted by the gear unit 8b. The output shaft 8c includes a pulley. The output shaft 8c is connected to the step sprocket 5 via a chain belt wound around the pulley. For example, the brake 8d is a disc brake. The brake 8d can brake the input shaft 8a. The V-belt 9 is wound around the pulley of the input shaft 8a. The driving motor 10 includes a pulley 11. A V-belt 9 is wound around the pulley 11 .

[0014] When the escalator 1 is operating, the drive motor 10 generates a rotational driving force. The rotational driving force of the drive motor 10 is input to the input shaft 8a of the reducer 8 via a V-belt 9. The reducer 8 rotates the step sprocket 5 via the output shaft 8c and a chain belt. As the step sprocket 5 rotates, the steps 4 circulate between the first entrance / exit 2a and the second entrance / exit 2b. For example, the brake 8d applies a braking force to the input shaft 8a, thereby stopping the steps 4 via the input shaft 8a, the gear portion 8b, the output shaft 8c, and the step sprocket 5.

[0015] FIG. 2 shows the drive machine 7 as seen from the X direction in FIG. 1. FIG. 3 shows the drive motor 10 as seen from the Y direction in FIG. 1. In FIGS. 2 and 3, devices other than the drive machine 7 are not shown. The drive motor 10 further has a rotating shaft 12 and a flywheel 13. The rotating shaft 12 outputs the rotational driving force of the drive motor 10. The pulley 11 is fixed to the rotating shaft 12 by a machine key 14 or the like so that it can rotate synchronously with the rotating shaft 12.

[0016] The flywheel 13 has a disk portion 13a and an attachment portion 13b. The disk portion 13a is a disk with a radius and thickness that generate a specified inertial torque. The radius of the disk portion 13a is larger than the radius of the pulley 11. For example, the diameter of the disk portion 13a is 40 cm. The center of gravity of the disk portion 13a coincides with the rotation axis of the rotating shaft body 12. The attachment portion 13b is a portion that fixes the disk portion 13a to the pulley 11. The radius of the attachment portion 13b is larger than the radius of the pulley 11. The attachment portion 13b is firmly attached to the pulley 11 so that the center of gravity of the disk portion 13a does not shift from the rotation axis. For example, the attachment portion 13b is welded to the pulley 11. The attachment portion 13b is bolted to the pulley 11 to prevent it from easily rotating. The flywheel 13 may be manufactured integrally with the pulley 11. As shown in FIG. 2, the pulley 11 is located between the drive motor 10 and the flywheel 13 .

[0017] Fluctuations in the torque output by drive motor 10 are suppressed by flywheel 13. Generally, in an escalator, the deceleration, which is the negative acceleration during an emergency stop, must not fall below a specified acceleration to ensure the safety of passengers. Even if drive motor 10 is forced to an emergency stop due to a power outage or the like, the inertial torque of flywheel 13 prevents the negative acceleration of the multiple steps 4 from falling below the specified acceleration, i.e., prevents the multiple steps 4 from suddenly stopping. To generate such inertial torque, the radius of the flywheel provided in the motor of an escalator is generally larger than the radius of the flywheel provided in a motor used for another purpose.

[0018] Next, the extraction unit 20 will be described with reference to FIGS. 4 and 5 are side views of the extraction unit in embodiment 1. Fig. 5 is a view taken along the arrow Z in Fig. 4.

[0019] When maintenance work is performed on the bearings of the drive motor 10, the pulley 11 and the flywheel 13 need to be pulled out and removed from the rotating shaft 12. At this time, the pulley 11 and the flywheel 13 are pulled out in a pulling direction P opposite to the direction in which they face the drive motor 10. To pull out the pulley 11 and the flywheel 13, the inspector uses a pulling unit 20.

[0020] As shown in FIGS. 4 and 5, the extraction unit 20 includes a puller 30 and an extraction aid 40.

[0021] The puller 30 is a two-jaw puller corresponding to the diameter of the flywheel 13. As an example, the puller 30, like a gear puller, includes a base 31, a pair of arms 32, a pair of claws 33, and a pusher 34. For example, the base 31 is rod-shaped and longer than the diameter of the flywheel 13. The pair of arms 32 are rotatably attached to both ends of the base 31. The pair of claws 33 are rotatably attached to each of the pair of arms 32. For example, each of the pair of claws 33 has a claw portion 33a bent at a right angle at the end opposite the arm 32. The pusher 34 is rod-shaped and has a male thread groove on its outer periphery. The pusher 34 penetrates the base 31 at a right angle. The longitudinal direction of the pusher 34 is oriented in the longitudinal direction of the arm 32. The pusher 34 can move forward and backward in a direction perpendicular to the base body 31 by rotating about an axis in the longitudinal direction relative to the base body 31 .

[0022] The extraction aid 40 includes a plurality of contact bodies 41, one or more extension bodies 42, and a pair of working bodies 43. Each of the plurality of contact bodies 41 has a similar configuration. As an example, Figures 4 and 5 show an extraction aid 40 including four contact bodies 41 and a pair of extension bodies 42.

[0023] The contact body 41 has a contact surface portion 41a and an attachment portion 41b.

[0024] The contact surface 41a is a surface that comes into contact with the flywheel 13. Specifically, the contact surface 41a comes into contact with an area of ​​the inner surface of the flywheel 13 that faces the drive motor 10 and is within a specified first distance from the rotating shaft 12. The inner surface is also the surface of the flywheel 13 that faces away from the drawing direction P. The first distance may be set to any value, such as 15 cm. The first distance may be a distance that does not exceed the radius of the flywheel 13 and is the radius of the pulley 11 plus a specified second distance. The second distance is set to any value, such as 5 cm. The first distance may be shorter than half the radius of the disk-shaped mounting portion 13b. The first distance may be shorter than two-thirds the radius of the disk-shaped mounting portion 13b.

[0025] For example, the surface of the contact surface portion 41a is made of resin such as rubber. The area of ​​the contact surface portion 41a is larger than the area of ​​the portion where the claw portion 33a catches. Therefore, even if it comes into contact with the flywheel 13, the flywheel 13 is less likely to be scratched. The contact surface portion 41a has a magnetic material such as a magnet inside the surface. An attractive force is generated between the contact surface portion 41a and the flywheel 13 due to magnetic force. Therefore, the contact body 41 can easily be maintained in a state where it is in contact with the flywheel 13, making the removal operation easy.

[0026] The attachment portion 41b is a portion to which the extension body 42 is attached. For example, the attachment portion 41b is provided on the opposite side of the contact surface portion 41a from the flywheel 13.

[0027] For example, the four contact bodies 41 are attached to the flywheel 13 so as to form the vertices of a substantially square. In this case, the intersection of the diagonals of the substantially square coincides with the rotating shaft body 12.

[0028] The extension body 42 has a rod shape. For example, the extension body 42 is a thin metal angle. The longitudinal length of the extension body 42 is longer than the diameter of the disk portion 13a of the flywheel 13. Each of the pair of extension bodies 42 is connected at its center to a set of two contact bodies 41. Note that one extension body 42 may be connected to one or more contact bodies 41.

[0029] In this state, the pair of extension bodies 42 are aligned with their longitudinal directions facing the same direction. Specifically, the pair of extension bodies 42 are aligned with their longitudinal directions parallel to each other. The rotating shaft 12 is positioned between the pair of extension bodies 42. Both ends of the extension body 42 are located outside the outer periphery of the flywheel 13.

[0030] For example, each of the pair of acting bodies 43 has a rod shape. For example, the extension body 42 is a thin, elongated metal angle. One of the pair of acting bodies 43 is attached to one end of one of the pair of extension bodies 42 and one end of the other of the pair of extension bodies 42, respectively. The other of the pair of acting bodies 43 is attached to the other end of one of the pair of extension bodies 42 and the other end of the other of the pair of extension bodies 42, respectively. That is, the pair of extension bodies 42 and the pair of acting bodies 43 are connected so that they form sides of a rectangle. In this state, the rotating shaft 12 is located between one and the other of the pair of acting bodies 43. That is, the pair of acting bodies 43 are located on both sides of the rotating shaft 12. The distance from one to the other of the pair of acting bodies 43 is the same as or longer than the diameter of the flywheel 13.

[0031] In this way, in the extraction aid 40, the contact body 41, the extension body 42, and the pair of acting bodies 43 constitute a contact portion, an extension portion, and a pair of acting portions, respectively.

[0032] During the extraction operation, the worker removes bolts and other fastening elements that secure the pulley 11 to the rotating shaft 12, and then positions the extraction aid 40 in the position shown in FIG. 4 . Because the pulley 11 is fastened to the rotating shaft 12, a large force is required to extract the pulley 11 from the rotating shaft 12 in this state. After the extraction aid 40 is placed on the flywheel 13, the worker positions the puller 30 on the opposite side of the flywheel 13 from the extraction aid 40. Then, the pair of claws 33 of the puller 30 are respectively hooked onto the pair of operating bodies 43. At this time, the base 31 and the pair of arms 32 of the puller 30 are located on the side of the flywheel 13 in the extraction direction P. The pair of operating bodies 43 are formed so that the claw portions 33 a of the pair of claws 33 can be hooked onto the pair of operating bodies 43 in this state.

[0033] Thereafter, the worker rotates the pusher 34 while the end of the pusher 34 facing the drive motor 10 is pressed against the rotating shaft 12. At this time, the pusher 34 is rotated in a direction in which the base 31 moves in the extraction direction P, which is the direction in which the base 31 moves away from the drive motor 10. In this case, the base 31, the pair of arms 32, and the pair of claws 33 move together in the extraction direction P. A force in the extraction direction P is applied from each of the pair of claws 33 to the pair of acting bodies 43, which are a pair of acting portions. The pair of extension bodies 42, which are extension portions, transmit the force applied to the pair of acting bodies 43 to the four contact bodies 41. The four contact bodies 41, which are contact portions, apply a force in the extraction direction P to the mounting portion 13b of the flywheel 13. The mounting portion 13b transmits the force in the extraction direction P to the pulley 11. The worker rotates the pusher 34 until the pulley 11 comes off the rotary shaft 12, and pulls the pulley 11 out of the rotary shaft 12.

[0034] Next, a comparative example in which the pulley 11 is pulled out without using the pullout aid 40 will be described with reference to FIG. FIG. 6 is a side view of the main part of the driving machine when the extraction aid of the extraction unit according to the first embodiment is not used.

[0035] As shown in Figure 6, when the extraction aid 40 is not used, only the puller 30 is used in the extraction work, as in the past. A pair of claws 33 of the puller 30 is hooked directly onto the outer periphery of the flywheel 13. The worker rotates the pusher 34 to apply force from the pair of claws 33 to the flywheel 13, thereby extracting the pulley 11.

[0036] At this time, bending stress is generated by the puller 30 in the disk portion 13a of the flywheel 13 from the outer periphery to the center. The force of the claws 33 applied to the outer periphery of the flywheel 13 acts on the center of the flywheel 13, generating a large torque in the pulling direction P. At this time, the flywheel 13 may be deformed. Furthermore, because the contact area between the claws 33 and the flywheel 13 is small, the outer periphery of the flywheel 13 may be damaged or deformed by the claws 33. Furthermore, the paint on the flywheel 13 may peel off at the area where the claws 33 come into contact. In this way, the flywheel 13 may be scratched.

[0037] If the flywheel 13 is deformed or damaged, the center of gravity of the flywheel 13 may shift from the axis of the rotating shaft 12. For this reason, the pulling operation is carried out carefully and little by little to prevent deformation of the flywheel 13. Furthermore, if the paint on the flywheel 13 peels off, the worker must repaint the peeled off area to prevent the center of gravity from changing. As such, the conventional pulling operation using only the puller 30 requires time and the skill of the worker to prevent the center of gravity of the flywheel 13 from changing.

[0038] 4 and 5, by using the extraction aid 40 together with the puller 30, the claws 33 do not come into direct contact with the flywheel 13. The force for extraction is applied to the flywheel 13 at a position close to the rotating shaft 12. A force, i.e., a surface pressure, is applied to the flywheel 13 over a larger contact area than the claws 33. This prevents the flywheel 13 from deforming and the paint from peeling off.

[0039] According to the first embodiment described above, the extraction aid 40 has a contact portion, an extension portion, and a pair of action portions. The force in the extraction direction P applied from the puller 30 to the pair of action portions is transmitted by the extension portion to the contact portion, and then from the contact portion to the flywheel 13. The claws 33 do not come into contact with the flywheel 13. Therefore, damage to the flywheel 13 can be prevented when the pulley 11 and flywheel 13 are extracted.

[0040] Furthermore, the contact portion contacts the flywheel 13 at a position within a first distance from the rotating shaft 12. This prevents the distance from the contact position between the flywheel 13 and the contact portion to the rotating shaft 12 from becoming too long. As a result, the bending stress generated from the outer periphery to the center of the flywheel 13 can be reduced, and deformation of the flywheel 13 can be prevented. Furthermore, if the first distance is shorter than two-thirds of the radius of the flywheel 13, deformation of the flywheel 13 can be more effectively prevented. Note that it is preferable that the first distance is as small as possible, and therefore if the first distance is shorter than half the radius of the flywheel 13, deformation of the flywheel 13 can be more effectively prevented.

[0041] The contact portion also has a magnet inside. The magnet attracts the contact portion to the flywheel 13. During the extraction work, the contact portion is attracted to the flywheel 13, so that the worker does not need to support the contact portion, extension portion, and action portion. This allows the extraction work to be carried out efficiently.

[0042] The contact portion is made up of a plurality of contact bodies 41. The extension portion is made up of a pair of extension bodies 42. The pair of action portions is made up of one of a pair of action bodies 43 and the other of the pair of action bodies 43. The pair of extension bodies 42 are aligned with their longitudinal directions facing the same direction so that the rotating shaft body 12 is located between them. Therefore, the force of pulling out from the rotating shaft body 12 can be efficiently applied to the flywheel 13.

[0043] The four contact bodies 41 and the pair of extension bodies 42 do not have to be attached in the form shown in Figures 4 and 5, as long as the pair of acting bodies 43 are arranged so that the rotating shaft body 12 is positioned between the pair of acting bodies 43.

[0044] Embodiment 2 Fig. 7 is a side view of the main parts of a driving machine to which the extraction unit of embodiment 2 is applied. Fig. 8 is a perspective view of the main parts of a driving machine to which the extraction unit of embodiment 2 is applied. Fig. 9 is a top view of the main parts of a driving machine to which the extraction unit of embodiment 2 is applied and the extraction unit. Fig. 10 is a side view of the extraction unit of embodiment 2. Note that parts that are the same as or equivalent to parts of embodiment 1 are given the same reference numerals. Explanation of these parts will be omitted.

[0045] As shown in Figures 7 and 8, in the second embodiment, the flywheel 13 is located between the drive motor 10 and the pulley 11. The gap between the flywheel 13 and the drive motor 10 is narrower than the gap between the flywheel 13 of the drive unit 7 and the drive motor 10 in the first embodiment. Even in this case, the flywheel 13 is firmly attached to the pulley 11. The pulley 11 is attached to the rotating shaft 12. That is, the pulley 11 needs to be removed during maintenance.

[0046] As shown in Figures 9 and 10, in the second embodiment, the extraction aid 40 does not need to include the contact body 41. Figure 9 shows an overview of adjusting the attachment position of one of the pair of extension bodies 42 when attaching the extraction aid 40. Figure 10 shows an overview of the attached extraction aid 40. The short-side length of the pair of extension bodies 42 is shorter than the gap between the drive motor 10 and the flywheel 13. In this case, the center portion of the extension body 42, located midway between both ends, contacts the surface of the flywheel 13 facing the drive motor 10. The center portion of the extension body 42 contacts the flywheel 13 at a position within the first distance from the rotating shaft body 12. As in the first embodiment, a pair of acting bodies 43 are attached to both ends of the extension body 42, respectively.

[0047] That is, in the extraction aid 40 of the second embodiment, the central portions of the pair of extension bodies 42, the extension bodies 42, and the pair of acting bodies 43 respectively constitute a contact portion, an extension portion, and a pair of acting portions.

[0048] According to the second embodiment described above, the contact portion is formed by the central portions of the pair of extension bodies 42. The extension portion is formed by the pair of extension bodies 42. The pair of acting portions is formed by one of the pair of acting bodies 43 and the other of the pair of acting bodies 43. Therefore, even if the gap between the flywheel 13 and the drive motor 10 is narrow, the extraction unit 20 can be applied in the extraction work.

[0049] Embodiment 3 11 and 12 are side views of the extraction unit in embodiment 3. Note that parts that are the same as or equivalent to parts in embodiment 1 or 2 are given the same reference numerals. Explanation of these parts will be omitted. Also, in FIGS. 11 and 12, the puller 30 is not shown.

[0050] 11 and 12, the configuration of extraction aid 40 in embodiment 3 is different from extraction aid 40 in embodiments 1 and 2. Extraction aid 40 includes a pair of contact bodies 51, a pair of extension bodies 52, a first connecting body 54, and a second connecting body 55.

[0051] The pair of contact bodies 51 are rod-shaped. The longitudinal length of each of the pair of contact bodies 51 is greater than the diameter of the pulley 11. The area of ​​the contact surface portion 51a of the pair of contact bodies 51 is greater than the area of ​​the contact surface portion 41a in the first embodiment. For example, the surface of the contact surface portion 51a is made of a resin such as rubber. The contact surface portion 51a has a magnetic material such as a magnet inside the surface.

[0052] The pair of extension bodies 52 are rod-shaped. The length in the longitudinal direction of the pair of extension bodies 52 is longer than the shortest distance from the outer periphery of the pulley 11 to the outer periphery of the flywheel 13. One of the pair of extension bodies 52 is firmly fixed at one end to one of the pair of contact bodies 51 by welding, bolts, etc. The other of the pair of extension bodies 52 is firmly fixed at one end to the other of the pair of contact bodies 51 by welding, bolts, etc.

[0053] The first connecting body 54 is rod-shaped and is fixed to one end of one of the pair of contact bodies 51 and to one end of the other of the pair of contact bodies 51, connecting the pair of contact bodies 51 together.

[0054] The second connecting body 55 is rod-shaped. One end of the second connecting body 55 is rotatably connected to the other end of one of the pair of contact bodies 51 by a pin 55a. The other end of the second connecting body 55 is detachably connected to the other end of the other of the pair of contact bodies 51 by a bolt 55b. In other words, when the bolt 55b is removed, the second connecting body 55 can rotate in the direction of arrow R around one end.

[0055] With the bolt 55b removed, the extraction aid 40 is positioned so that the pulley 11 is located inside the U-shaped region formed by the pair of contact bodies 51 and the first connecting body 54. Then, with the extraction aid 40 in the attached state shown in FIG. 11 , the second connecting body 55 is connected and fixed to the other of the pair of contact bodies 51 by the bolt 55b. The extraction aid 40 is positioned so as to face the inner surface of the flywheel 13. Each of the pair of contact bodies 51 contacts the mounting portion 13b of the flywheel 13 at its contact surface portion 51a. The pair of contact bodies 51, the first connecting body 54, and the second connecting body 55 form a rectangle whose sides are each defined by a corresponding one. The pulley 11 and the rotating shaft 12 are positioned inside the rectangle.

[0056] In this state, one of the pair of extension bodies 52 extends from the center of one of the contact bodies 51 outward from the outer periphery of the flywheel 13. The other of the pair of extension bodies 52 extends from the center of the other of the contact bodies 51 outward from the outer periphery of the flywheel 13. The one and the other of the pair of extension bodies 52 are aligned on the same straight line passing through the rotating shaft body 12.

[0057] One of the pair of claws 33 of the puller 30 is hooked on end E, which is the other end of one of the pair of extension bodies 52 opposite the contact body 51. The other of the pair of claws 33 of the puller 30 is hooked on end E, which is the other end of the other of the pair of extension bodies 52 opposite the contact body 51. In other words, each end E of the pair of extension bodies 52 is formed so that the claw 33 can be hooked.

[0058] Thus, in the extraction aid 40, the contact body 51, the central portion of the extension body 52, and the end portions E of each of the pair of extension bodies 52 constitute a contact portion, an extension portion, and a pair of action portions, respectively.

[0059] A force in the pulling-out direction P is applied to the pair of end portions E from each of the pair of claws 33. The extension body 52 transmits the force applied to the end portions E to each of the pair of contact bodies 51. Because the pair of contact bodies 51, the first connecting body 54, and the second connecting body 55 form an integrated quadrangle, the force transmitted from the extension body 52 is applied to the mounting portion 13b of the flywheel 13 in the pulling-out direction P by the pair of contact bodies 51. In this way, the pulley 11 is pulled out in the pulling-out direction.

[0060] After the extraction operation is completed, bolt 55b is removed. Second connecting body 55 rotates around pin 55a, and one side of second connecting body 55 opens out of the rectangle formed by the pair of contact bodies 51, first connecting body 54, and second connecting body 55. By removing pulley 11 from the open side, extraction aid 40 is removed.

[0061] According to the third embodiment described above, the extraction aid 40 includes a pair of contact bodies 51, a first connecting body 54, a second connecting body 55, and a pair of extension bodies 52. The contact portion is formed by the pair of contact bodies 51. The extension portion is formed by the pair of extension bodies 52. One of the pair of action portions is formed by one end E of the pair of extension bodies 52. The other of the pair of action portions is formed by the other end E of the pair of extension bodies 52. The force acting on the end E of the pair of extension bodies 52 in the extraction direction P is transmitted to the pair of contact bodies 51 by the extension bodies 52, and then transmitted to the flywheel 13. Therefore, damage to the flywheel 13 can be prevented when the pulley 11 and the flywheel 13 are extracted.

[0062] To summarize the above explanation, possible configurations of the technology according to the present disclosure include the configurations listed below as appendices. (Appendix 1) An extraction aid used together with a puller to extract a pulley of an escalator driver and a flywheel fixed to the pulley from a rotating shaft of the driver in a extraction direction, a contact portion that contacts an inner surface of the flywheel that faces away from the pulling direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; A removal aid equipped with (Appendix 2) 2. The extraction aid according to claim 1, wherein the contact portion contacts the flywheel at a position within a first specified distance from the rotating shaft body. (Appendix 3) 3. The extraction aid of claim 2, wherein the first distance is less than two-thirds of the radius of the flywheel. (Appendix 4) 4. The extraction aid according to claim 1, wherein the contact portion has a magnet therein. (Appendix 5) a plurality of contact bodies constituting the contact portion; a pair of extension bodies that are rod-shaped and longer than the diameter of the flywheel, each of which is connected to one or more of the plurality of contact bodies, and which are arranged side by side with their longitudinal directions facing in the same direction so that the rotating shaft body is located therebetween and form the extension portion; one acting body that connects one end of one of the pair of extension bodies and one end of the other of the pair of extension bodies to form one of the pair of acting parts; a second acting body that connects the second end of one of the pair of extension bodies to the second end of the other of the pair of extension bodies to form the other of the pair of acting parts; The extraction aid according to any one of appendices 1 to 4, comprising: (Appendix 6) a pair of extension bodies each having a rod shape longer than the diameter of the flywheel, aligned in the same longitudinal direction with the rotating shaft body positioned therebetween, and each having a center portion in contact with the inner surface of the flywheel to form the extension portion; one acting body that connects one end of one of the pair of extension bodies and one end of the other of the pair of extension bodies to form one of the pair of acting parts; a second acting body that connects the second end of one of the pair of extension bodies to the second end of the other of the pair of extension bodies to form the other of the pair of acting parts; Equipped with The extraction aid according to any one of claims 1 to 3, wherein the contact portion is a portion of the pair of extension bodies that contacts the inner surface. (Appendix 7) a pair of rod-shaped contact bodies arranged side by side with their longitudinal directions facing in the same direction so that the rotating shaft body is located therebetween, and constituting the contact portion; a first connecting body connecting one end of each of the pair of contact bodies; a second connecting body connecting the other end portions of the pair of contact bodies; one extension body having a rod shape, one end of which is fixed to one of the pair of contact bodies and the other end of which extends outward beyond the outer periphery of the flywheel toward the outer periphery of the flywheel to form the extension portion; a second extension body having a rod shape, one end of which is fixed to the other of the pair of contact bodies, and the other end of which extends outward beyond the outer periphery of the flywheel toward the outer periphery of the flywheel to form the extension portion; Equipped with one of the pair of action portions is the other end of the one extension body, The extraction aid according to any one of Supplementary Notes 1 to 4, wherein the other of the pair of action parts is the other end of the other extension body. [Explanation of symbols]

[0063] DESCRIPTION OF SYMBOLS 1 Escalator, 2a First entrance / exit, 2b Second entrance / exit, 3 Main frame, 3a Machine room, 5 Step sprocket, 6 Step chain, 7 Drive machine, 8 Reducer, 8a Input shaft, 8b Gear portion, 8c Output shaft, 8d Brake, 9 V-belt, 10 Drive motor, 11 Pulley, 12 Rotating shaft body, 13 Flywheel, 13a Disk portion, 13b Mounting portion, 14 Machine key, 20 Pulling unit, 30 Puller, 31 Base body, 32 Arm, 33 Claw, 33a Claw portion, 34 Pushing body, 40 Pulling aid, 41 Contact body, 41a Contact surface portion, 41b Mounting portion, 42 Extension body, 43 Acting body, 51 Contact body, 51a contact surface portion, 52 extension body, 54 first connecting body, 55 second connecting body, 55a pin, 55b bolt, E end portion, P withdrawal direction

Claims

1. An extraction aid used together with a puller to extract a pulley of an escalator drive machine and a flywheel fixed to the pulley from a rotating shaft of the drive machine in a extraction direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; Equipped with The area of ​​the contact portion of the extraction aid is larger than the area of ​​the portion where the pair of claws of the puller catch.

2. A pulling-out aid used together with a puller to pull out a pulley of an escalator drive machine and a flywheel fixed to said pulley from a rotating shaft of said drive machine in a pulling-out direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; Equipped with The contact portion is a removal aid that contacts the flywheel at a position within a specified first distance from the rotating shaft body.

3. 3. The extraction aid of claim 2, wherein the first distance is less than two-thirds of the radius of the flywheel.

4. A pulling-out aid used together with a puller to pull out a pulley of an escalator drive machine and a flywheel fixed to said pulley from a rotating shaft of said drive machine in a pulling-out direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; Equipped with The contact portion is a removal aid having a magnet inside.

5. A pulling-out aid used together with a puller to pull out a pulley of an escalator drive machine and a flywheel fixed to said pulley from a rotating shaft of said drive machine in a pulling-out direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; a plurality of contact bodies constituting the contact portion; a pair of extension bodies each having a rod shape longer than a diameter of the flywheel, each connected to one or more of the plurality of contact bodies, and arranged side by side with their longitudinal directions facing in the same direction so that the rotating shaft body is located therebetween, and constituting the extension portion; one acting body that connects one end of one of the pair of extension bodies and one end of the other of the pair of extension bodies to form one of the pair of acting parts; a second acting body that connects the second end of one of the pair of extension bodies to the second end of the other of the pair of extension bodies to form the other of the pair of acting parts; A removal aid equipped with

6. A pulling-out aid used together with a puller to pull out a pulley of an escalator drive machine and a flywheel fixed to said pulley from a rotating shaft of said drive machine in a pulling-out direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; a pair of extension bodies each having a rod shape longer than the diameter of the flywheel, aligned in the same longitudinal direction with the rotating shaft body positioned therebetween, and each having a center portion in contact with the inner surface of the flywheel to form the extension portion; one acting body that connects one end of one of the pair of extension bodies and one end of the other of the pair of extension bodies to form one of the pair of acting parts; a second acting body that connects the second end of one of the pair of extension bodies to the second end of the other of the pair of extension bodies to form the other of the pair of acting parts; Equipped with The contact portion is a portion of the pair of extension bodies that contacts the inner surface of the extraction aid.

7. A pulling-out aid used together with a puller to pull out a pulley of an escalator drive machine and a flywheel fixed to said pulley from a rotating shaft of said drive machine in a pulling-out direction, a contact portion that contacts an inner surface of the flywheel that faces away from the extraction direction; an extension portion extending from the contact portion toward an outer periphery of the flywheel and outward beyond the outer periphery; a pair of action portions that are present on both sides of the rotary shaft at an end portion of the extension portion that is outer than the outer circumferential portion, and that are formed so that a pair of claws of the puller can be respectively hooked thereon; a pair of rod-shaped contact bodies arranged side by side with their longitudinal directions facing in the same direction so that the rotating shaft body is located therebetween, and constituting the contact portion; a first connecting body connecting one end of each of the pair of contact bodies; a second connecting body connecting the other end portions of the pair of contact bodies; one extension body having a rod shape, one end of which is fixed to one of the pair of contact bodies and the other end of which extends outward beyond the outer periphery of the flywheel toward the outer periphery of the flywheel to form the extension portion; a second extension body having a rod shape, one end of which is fixed to the other of the pair of contact bodies, and the other end of which extends outward beyond the outer periphery of the flywheel toward the outer periphery of the flywheel to form the extension portion; Equipped with one of the pair of action portions is the other end of the one extension body, The other of the pair of action parts is the other end of the other extension body, which is a removal aid.

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