JP2011051791A - Sheave replacement device, elevator, method of extracting sheave, and method of fitting sheave - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extract the main sheave of a hoist for an elevator at site. <P>SOLUTION: This sheave replacement device includes a rod for extraction which can press the end of a rotating shaft 7 when a main sheave 6 is extracted from the rotating shaft 7, a plate 13a for sheave extraction which faces outside disk face facing the outer side in the rotating axis direction of the main sheave 6, is fixed to the outside disk face, and in which a through hole 17 for extraction which penetrates through an axial direction and through which the rotating shaft 7 and the rod for extraction can pass is formed, and a drive part 24 which makes the rod for extraction press the end of the rotating shaft 7 toward the rotating shaft 7 while the rod for extraction extends through the through hole 17 for extraction and which moves the plate 13a for sheave extraction to which the main sheave 6 is fixed in the direction apart from the rotating shaft 7. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheave changer and an elevator, and a sheave extraction method and a sheave insertion method.

  An elevator hoist generally includes a motor that generates a driving force, and a main sheave that rotates with the rotating shaft of the motor and transmits the driving force to a main rope. The main sheave is detachably fitted on the rotating shaft.

  As the winder continues to be used, the groove of the main sheave is worn due to friction with the main rope. For this reason, it is necessary to remove the main sheave from the hoist and replace it with a new one. Of the members constituting the hoisting machine, the main sheave is often replaced frequently.

  For example, as disclosed in Patent Document 1, a sheave is replaced by providing a through hole into which a heater is inserted into a boss portion of a sheave fixed to a sheave spring on a sheave shaft, and the sheave is expanded by heating with the heater. A method for making it easier to remove the sheave from the sheave shaft is known.

JP 7-215640 A

  However, in the method of exchanging the sheave as described above, it is necessary to remove the hoisting machine from the place where the hoisting machine is installed, for example, the machine room above the hoistway, and replace the main sheave outside the machine room. There are many cases. Since the place where the winder is installed is small, the time required for replacement often becomes long. In addition, if the apparatus for replacement is large, the work is often difficult.

  The present invention has been made to solve the above-described problems, and an object thereof is to efficiently replace the main sheave of the elevator hoist.

  In order to achieve the above object, a sheave exchanging device according to the present invention is fitted in such a manner that it can be removed from the outside in the axial direction so that one end of a horizontal rotating shaft of a hoisting machine for an elevator penetrates. A sheave exchanging device for exchanging a cylindrical main sheave with a main rope that rotates together with the main rope that moves up and down the elevator car, and the sheave exchanging device removes the main sheave from the rotating shaft. The main sheave can be disposed in the vicinity of the end of the rotary shaft, and when the main sheave is extracted from the rotary shaft, the end of the rotary shaft can be pushed in by extending in the direction of the rotary shaft. The arranged extraction rod and an outer circle facing the outer side of the main sheave in the rotation axis direction when the main sheave is extracted from the rotation shaft A sheave extraction plate that is detachably attached to the outer disk surface so as to face the surface, and has an extraction through-hole formed in the axial direction through which the rotary shaft and the extraction rod can pass. The end of the rotating shaft is pushed while maintaining the state where the extraction rod passes through the extraction through-hole, and the sheave extraction plate to which the main sheave is fixed is moved in a direction away from the rotation shaft. And a drive unit configured as described above.

  The sheave exchanging device according to the present invention is mounted on a hoisting machine having a rotating shaft that is horizontally disposed and has a bolt hole formed at an end thereof, rotates together with the rotating shaft, and the main rope is suspended on an outer peripheral surface. In the sheave changer that fits the cylindrical main sheave from the outside in the rotation axis direction so that the end of the rotation shaft penetrates, the sheave changer is configured to insert the main sheave into the rotation shaft. The main sheave can be disposed in the vicinity of the end of the rotary shaft on the side to which the main sheave is attached, and when the main sheave for attachment is attached to the rotary shaft, the main sheave for attachment is detachably attached, A sheave fitting plate in which a fitting through-hole penetrating in the axial direction is formed, and a mounting bolt that can be passed through the fitting through-hole and screwed into the bolt hole. And when the mounting bolt is threaded into at least one of the bolt holes through the fitting through hole, and the mounting bolt is tightened in the direction of the rotation axis, The main sheave fixed to the sheave fitting plate is configured so as to be pressed toward the rotating shaft and fitted into the rotating shaft to be fixed.

  The elevator according to the present invention includes a car that is configured to be movable up and down in a hoistway, a main rope that suspends the car, a rotary shaft that is horizontally disposed, and one end of the rotary shaft. A hoisting machine having a cylindrical main sheave that is fitted in a removable manner from the outside in the axial direction so as to penetrate, rotates together with this rotating shaft, and a main rope that moves the elevator car up and down is suspended on the outer peripheral surface; An elevator having a sheave exchanging device that can be disposed in the vicinity of an end of the rotating shaft on the side to which the main sheave is attached, wherein the sheave exchanging device removes the rotating shaft when the main sheave is withdrawn from the rotating shaft. An extraction rod that extends in the direction and is arranged so as to be able to push the end of the rotary shaft, and when the main sheave is extracted from the rotary shaft, Extraction that is attached to the outer disk surface so as to face the outer disk surface facing the outer side in the rotational axis direction of the in-sheave, and is detachably attached to the rotary shaft and the extraction rod. The sheave extraction plate in which the through-hole is formed, and the sheave extraction in which the extraction rod pushes the end of the rotating shaft while maintaining the state of passing through the extraction through-hole, and the main sheave is fixed And a drive unit configured to move the working plate in a direction away from the rotation shaft.

  The elevator according to the present invention includes a car that is configured to be movable up and down in a hoistway, a main rope that suspends the car, and a rotary shaft that is horizontally disposed and has a bolt hole formed at an end thereof. And a cylindrical main sheave that is removably fitted from the outside in the direction of the rotation axis so that the end portion of the rotation shaft passes therethrough, rotates together with the rotation shaft, and the main rope is suspended on the outer peripheral surface. And a sheave changer that can be disposed in the vicinity of the end of the rotary shaft on the side to which the main sheave is attached. The sheave changer attaches the main sheave for attachment to the rotary shaft. When the main sheave for attachment is detachably attached, and a plate for fitting a sheave in which a through hole for insertion penetrating in the axial direction is formed, A mounting bolt that can be inserted into the insertion through hole and screwed into the bolt hole, and the installation bolt is passed through the insertion through hole and screwed into at least one of the bolt holes. When the mounting bolts are tightened in the direction of the rotation axis, the main sheave fixed to the sheave insertion plate is pressed to the direction where the rotation axis is and is fitted into the rotation axis. It is comprised so that it may be fixed.

  Further, the sheave extraction method according to the present invention is a sheave extraction method for extracting a main sheave fitted in a hoisting machine disposed above a hoistway, wherein the main sheave is one of horizontal rotating shafts of the hoisting machine. A cylindrical shape that is fitted with an end so as to pass through and is detachable, rotates with the rotating shaft, and can suspend a main rope that moves the elevator car up and down on the outer peripheral surface, and the sheave extraction method includes: A first member attaching step for detachably attaching a first member formed with a through hole for extraction through which the rotating shaft can penetrate on one disk surface of the main sheave, and the first member attaching step After that, a second member attachment step of attaching the rod-shaped second member extending in the axial direction to the end portion of the rotating shaft through the extraction through-hole, and the second After the member mounting step, the first member and the main sheave are moved away from the rotating shaft while pushing the end of the rotating shaft with the second member, and the main sheave is moved from the rotating shaft. And a sheave extracting step.

  Further, the sheave fitting method according to the present invention is a sheave fitting method in which a main sheave is attached to a hoisting machine including a rotating shaft that is arranged above a hoistway and has a bolt hole formed at one end thereof. The main sheave is a cylindrical shape that can be fitted so that the end of the rotating shaft penetrates, can rotate with the rotating shaft, and can suspend a main rope that moves the elevator car up and down on the outer peripheral surface, The sheave fitting method includes a first member attaching step of detachably attaching a first member formed with a fitting through-hole through which a mounting bolt can pass to one disk surface of the main sheave. And, after the first member attaching step, a main sheave arranging step of arranging the main sheave fixed to the first member in the vicinity of an end of the rotating shaft, and the main sheave arranging step. Later, the mounting bolt is passed through the fitting through hole and screwed into the bolt hole formed at the end, and the mounting bolt is rotated after the bolt mounting step. A sheave fitting step of fitting the main sheave fixed to the first member into the rotating shaft while tightening in the axial direction.

  According to the present invention, it is possible to efficiently replace the main sheave of the elevator hoist.

1 is a schematic elevation view showing a configuration of an embodiment of an elevator according to the present invention. It is a front view which shows the winding machine of FIG. It is the III-III arrow side view of FIG. It is a schematic perspective view which shows the main frame of the sheave exchange apparatus for exchanging the main sheave of FIG. FIG. 5 is a front view of a gantry unit on which the main frame of FIG. 4 is installed. It is a VI-VI arrow side view of FIG. It is a schematic front view which shows the state which arrange | positions a sheave exchange apparatus in the winding machine vicinity of FIG. It is a schematic front view which shows the state which fixed the main frame etc. of FIG. 4 to the main sheave of FIG. It is a schematic side view which shows the state by which the electric heater was wound around the main sheave of FIG. It is a schematic front view which shows the state which has pushed the rotating shaft in the main sheave of FIG. 8 with the piston of the drive part. It is the schematic front view which showed the state which the piston of FIG. 10 is pushing the rotating shaft, Comprising: (a) shows the state before a piston pushes a rotating shaft, (b) shows the piston pushing a rotating shaft. It shows the state after. It is a schematic front view which shows the state by which the main sheave was extracted from the state of FIG. FIG. 13 is a schematic front view showing a state before the main sheave is fitted to the rotating shaft of the hoisting machine of FIG. 12. FIG. 14 is a schematic front view showing a state in which a mounting bolt is passed through the sheave fitting plate and the main sheave shown in FIG. 13 and is attached to the shaft bolt hole at the end of the rotary shaft. It is a schematic front view which shows the state by which the main sheave was fitted by the rotating shaft from the state of FIG.

  An embodiment of an elevator according to the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic elevation view showing the configuration of the elevator according to the present embodiment. FIG. 2 is a front view showing the configuration of the hoist 1 shown in FIG. 3 is a side view taken along the line III-III in FIG. FIG. 4 is a schematic perspective view showing the main frame 12 of the sheave exchanging device for exchanging the main sheave 6 of FIG. FIG. 5 is a front view of the gantry 19 on which the main frame 12 of FIG. 4 is installed. 6 is a side view taken along the line VI-VI in FIG.

  FIG. 7 is a schematic front view showing a state in which the sheave exchanging device is arranged in the vicinity of the hoist 1 shown in FIG. FIG. 8 is a schematic front view showing a state in which the main frame 12 of FIG. 4 is fixed to the main sheave 6. FIG. 9 is a schematic side view showing a state in which the electric heater 23 is wound around the main sheave 6 of FIG. FIG. 10 is a schematic front view showing a state where the main shaft 6 of FIG. 8 is pushing the rotating shaft 7 with the piston 24 a of the drive unit 24.

  FIG. 11 is a schematic front view schematically showing a state in which the piston 24a of FIG. 10 pushes the rotating shaft 7, and (a) shows a state before the piston 24a pushes the rotating shaft 7, ) Shows a state after the piston 24a pushes the rotary shaft 7. FIG. 12 is a schematic front view showing a state where the main sheave 6 is extracted from the state of FIG.

  FIG. 13 is a schematic front view showing a state before the main sheave 6 is fitted into the rotating shaft 7 of the hoist 1 shown in FIG. FIG. 14 is a schematic front view showing a state in which the mounting bolt 26 is passed through the sheave fitting plate 13b and the main sheave 6 shown in FIG. 13 and attached to the shaft bolt hole 11 at the end of the rotary shaft 7. FIG. 15 is a schematic front view showing a state where the main sheave 6 is fitted on the rotating shaft 7 from the state of FIG. 14.

  First, the structure of the elevator of this embodiment is demonstrated.

  As shown in FIG. 1, the elevator includes a car 3 configured to be vertically movable in a hoistway 100, a main rope 2 for suspending the car 3, a deflecting sheave 5, and the main rope 2. The counterweight 4 and the hoist 1 are suspended. The position where the counterweight 4 moves up and down is determined by hanging the main rope 2 on the deflecting sheave 5. In addition, illustration of the hoistway 100 is abbreviate | omitted in FIG.

  As shown in FIG. 7, the winder 1 is disposed above the hoistway 100. A base pedestal 52 is arranged so as to straddle the upper end of the car rail 3 a for assisting the vertical movement of the car 3 and the upper end of the counterweight rail 4 a for assisting the running of the counterweight 4. A hoisting machine base 51 is fixed to the upper surface of the base base 52. The hoisting machine 1 is fixed to the upper surface of the hoisting machine base 51.

  As shown in FIG. 2, the hoist 1 includes a motor unit 8 that rotates a horizontal rotating shaft 7, and a main sheave 6 that is fixed to one end of the rotating shaft 7 and rotates together with the rotating shaft 7. . The main rope 2 is suspended from the main sheave 6 and has a function of transmitting the driving force of the motor unit 8 to the main rope 2. Further, a brake portion 9 is provided at the end portion of the rotating shaft 7 opposite to the side where the main sheave 6 is disposed.

  As shown in FIG. 3, the main sheave 6 has three sheave bolt holes 10 formed at equal intervals in the circumferential direction, that is, every 120 degrees on the disk surface facing the outer side of the rotating shaft 7. Two shaft bolt holes 11 are formed at the end of the rotating shaft 7. A keyway 36 is formed in each of the rotating shaft 7 and the main sheave 6. The key 35 is engaged with the key groove 36, and the rotating shaft 7 and the main sheave 6 are fixed so as not to rotate in the circumferential direction.

  Further, this elevator has a sheave exchanging device having a function of extracting the main sheave 6 from the rotating shaft 7 and a function of fitting the main sheave 6 into the rotating shaft 7. This sheave exchanging device is a device that can pull out the main sheave 6 from the rotating shaft 7 and fit the main sheave 6 into the rotating shaft 7 in a state in which the hoisting machine 1 is installed on the hoisting machine base 51. .

  Here, the configuration of the sheave exchange device will be described.

  The sheave changer includes a main frame 12, a gantry 19 that can be attached to and detached from the main frame 12, and a drive unit 24 that can be installed on the gantry 19.

  As shown in FIG. 4, the main frame 12 has four support members, that is, a first support member 14a, a second support member 14b, a third support member 14c, and a fourth support member 14d. Furthermore, it has a sheave extraction plate 13a and a sheave fitting plate 13b. Each of the first to fourth support members 14a to 14d has a columnar shape arranged horizontally in parallel with each other.

  Each of the sheave extraction plate 13a and the sheave fitting plate 13b is a rectangular plate, and a first suspension bolt 15a and a second suspension bolt 15b are attached to one side, respectively. In the sheave extraction plate 13a, an extraction through hole 17 through which the rotary shaft 7 can pass is formed. The sheave fitting plate 13b is formed with a fitting through-hole 18 that is sized so that a mounting bolt 26, which will be described later, can pass therethrough and cannot pass through the rotary shaft 7. A plurality of sheave mounting through holes 16 are formed around each of the extraction through holes 17 and the fitting through holes 18.

  Further, the sheave extraction plate 13a and the sheave fitting plate 13b are arranged in parallel with each other with the side to which the first suspension bolt 15a and the second suspension bolt 15b are attached as the upper side. .

  Further, the sheave extraction plate 13a and the sheave fitting plate 13b are fixed so that the first to fourth support members 14a to 14d penetrate the respective four corners vertically. Thus, the first to fourth support members 14a to 14d, the sheave extraction plate 13a, and the sheave fitting plate 13b are assembled together. At this time, the first and second support members 14a and 14b are arranged on the lower side, and the third and fourth support members 14c and 14d are arranged on the upper side, respectively.

  The gantry 19 is detachably attached between the sheave extraction plate 13a and the sheave fitting plate 13b. As shown in FIGS. 5 and 6, the gantry 19 includes a seat 19 a and a back 19 b. The seat portion 19a includes a rectangular plate member having a V-shaped groove portion 32 formed on the upper surface side, and leg members 19c provided at two locations so as to support the plate member and face each other. The back surface portion 19b is a plate material formed by extending one leg member 19c perpendicularly to the seat portion 19a.

  The V-shaped groove portion 32 formed in the seat portion 19a extends in the longitudinal direction of the plate material, and a fixing member 24b of the driving portion 24 described later can be installed. Each leg member 19c is formed with a first U-shaped groove 31a and a second U-shaped groove 31b having a U-shaped cross section. These first and second U-shaped grooves 31a and 31b are parallel to each other with a space therebetween, and the first and second support members 14a and 14b can be inserted therein. The first and second support members 14a and 14b are inserted into the first and second U-shaped grooves 31a and 31b, so that the seat 19a is fixed to the main frame 12.

  Moreover, the back surface part 19b is comprised so that the drive part 24 installed in said V-shaped groove part 32 can be fixed. When the gantry 19 is fixed to the main frame 12, the back surface 19b is fixed in contact with the sheave fitting plate 13b.

  The drive unit 24 includes a linear movement member (piston 24a) and a fixed member 24b, and is a hydraulic cylinder that is driven so that the piston 24a is linearly translated by hydraulic pressure. The piston 24a is configured to be movable vertically relative to the sheave extraction plate 13a. The fixing member 24b is configured to surround the piston 24a and is detachably attached to the gantry 19.

  When the drive part 24 installed in the gantry part 19 is attached to the main frame 12, the moving direction of the piston 24a is configured to be the direction in which the first to fourth support members 14a to 14d extend. .

  By incorporating the gantry 19 and the drive unit 24 into the main frame 12 as described above, a compact apparatus can be obtained.

  Here, a procedure for exchanging the main sheave 6 fitted in the hoist 1 using the sheave exchanging device will be described. First, a procedure for extracting the main sheave 6 from the rotating shaft 7 of the hoist 1 fixed to the hoist base 51 will be described.

  First, as shown in FIG. 7, the main frame 12 is suspended by hooking the suspension 20a of the lifting machine 20 suspended from the hoistway ceiling hook 21 onto the first and second suspension bolts 15a and 15b, respectively. By the lifting machine 20, the first to fourth support members 14 a to 14 d of the main frame 12 are arranged so as to be parallel (horizontal) to the rotation shaft 7.

  Thereafter, as shown in FIG. 8, the sheave extraction plate 13a is moved to a position facing the main sheave 6 and fixed to each other. At this time, the sheave mounting bolt 22 is passed through the sheave mounting through-hole 16 formed in the sheave extraction plate 13 a, and is attached and tightened to the sheave bolt hole 10 formed in the main sheave 6. Thereby, the main sheave 6 and the sheave extraction plate 13a are fixed to each other.

  7 and 8, as described above, illustration of the gantry unit 19 to which the main frame 12 is attached, the driving unit 24, and the like are omitted.

  Next, as shown in FIG. 9, the annular electric heater 23 is wound around and fixed to the outer peripheral surface of the main sheave 6 from the outside in the radial direction. The electric heater 23 is a belt-shaped member wound around the outer peripheral surface of the main sheave 6 and attached by an attachment member 23a or the like.

  The electric heater 23 can heat the main sheave 6 without using a flame. At this time, the heating temperature is about 100 ° C., for example. By this heating, the main sheave 6 expands, and the fitting between the main sheave 6 and the rotary shaft 7 becomes loose, and the main sheave 6 can be easily pulled out of the rotary shaft 7.

  Next, as shown in FIGS. 10 and 11A, the tip of the piston 24 a is connected to the end of the rotating shaft 7. Although detailed illustration about a connection method is abbreviate | omitted, an attachment jig etc. may be provided in the front-end | tip of piston 24a, and you may connect with the shaft bolt hole 11 grade | etc.,. At this time, the fixing member 24b is kept fixed to the main frame 12.

  Here, the drive unit 24 is driven so as to linearly translate in the direction in which the piston 24a presses the rotary shaft 7 (the direction of the arrow A in FIG. 11). By this driving, the amount of the piston 24a protruding from the fixing member 24b is changed from L1 shown in FIG. 11A to L2 shown in FIG. 11B. As illustrated, the axial length of L2 is greater than L1.

  By applying a force so that the piston 24a moves in the direction of the arrow A, the force acts so that the sheave extraction plate 13a and the main sheave 6 fixed thereto move in the direction opposite to the arrow A, respectively. . Thereby, the main sheave 6 can be extracted from the rotating shaft 7. As a result, as shown in FIG. 12, the main sheave 6 is extracted from the rotating shaft 7.

  Next, a procedure for fitting the main sheave 6 to the rotating shaft 7 of the hoisting machine 1 installed on the hoisting machine base 51 in the hoistway 100 using the sheave exchanging device will be described.

  First, as shown in FIG. 13, the main sheave 6 to be newly fitted to the rotary shaft 7 is fixed to the sheave fitting plate 13b in a state where the electric heater 23 is wound. The main sheave 6 and the like are brought close to the vicinity of the hoisting machine 1 fixed to the hoisting machine base 51 by the lifting machine 20.

  Here, when the main sheave 6 is attached, the orientation of the main frame 12 is opposite to that of the main sheave 6 shown in FIG.

  The shaft center of the main sheave 6 disposed in the vicinity of the winder 1 is adjusted so as to be substantially the same position as the center of the rotating shaft 7. Moreover, the state which the main sheave 6 was heated with the electric heater 23 is maintained similarly to the time of extraction.

  Next, as shown in FIG. 14, the mounting bolts 26 are attached to the shaft bolt holes 11 of the rotary shaft 7 through the sheave fitting through holes 18 of the main sheave 6. The mounting bolt 26 attached to the shaft bolt hole 11 is tightened in the direction of the rotary shaft 7. Thereby, the main sheave 6 is gradually fitted into the rotating shaft 7.

  As described above, the through-hole 18 for fitting cannot be passed through the rotating shaft 7, and is configured to always stop when the end of the rotating shaft 7 contacts the sheave fitting plate 13 b.

  Thereafter, although illustration is omitted, the sheave fitting plate 13b and the electric heater 23 are removed from the main sheave 6, and the replacement operation of the main sheave 6 is completed.

  As can be seen from the above description, according to the present embodiment, the main sheave 6 can be efficiently exchanged at the elevator installation site. In addition, by using the electric heater 23, the main sheave 6 can be easily heated and removed from the rotating shaft 7 and can be easily fitted even in a place where fire is strictly prohibited.

  The description of the present embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to this embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  In the present embodiment, a hydraulic cylinder is used for the drive unit 24, but the present invention is not limited to this. Any actuator that can be driven linearly and that is relatively small may be used. For example, an electric motor may be used.

  Further, the shape of the main frame 12 is not limited to the example of the present embodiment. It is also possible to fix the hydraulic cylinder directly to the plate that fixes the main sheave 6.

DESCRIPTION OF SYMBOLS 1 ... Winding machine, 2 ... Main rope, 3 ... Riding car, 3a ... Car rail, 4 ... Counterweight weight, 4a ... Counterweight rail, 5 ... Deflection sheave, 6 ... Main sheave, 7 ... Rotating shaft, 8 ... Motor part DESCRIPTION OF SYMBOLS, 9 ... Brake part, 10 ... Sheave bolt hole, 11 ... Shaft bolt hole, 12 ... Main frame, 13a ... Sheave extraction plate, 13b ... Sheave fitting plate, 14a ... First support member, 14b ... Second support member , 14c ... 3rd support member, 14d ... 4th support member, 15a ... 1st suspension bolt, 15b ... 2nd suspension bolt, 16 ... Through hole for sheave attachment, 17 ... Through hole for extraction, 18 ... Insertion penetration Hole, 19 ... frame part, 19a ... seat part, 19b ... back part, 19c ... leg member, 20 ... lifting machine, 20a ... hanging part, 21 ... hoistway ceiling hook, 22 ... sheave mounting bolt, 23 ... electric heater, 2 a ... mounting member, 24 ... driving unit, 24a ... linear movement part (piston), 24b ... fixing member, 26 ... mounting bolt, 31a ... first U-shaped groove, 31b ... second U-shaped groove, 32 ... V-shaped groove, 35 ... key, 36 ... keyway, 51 ... pedestal for hoisting machine, 52 ... base pedestal, 100 ... hoistway

Claims (11)

A main rope that rotates with the rotating shaft and moves the elevator car up and down is fitted to the outer surface of the elevator hoisting machine so that one end of the horizontal rotating shaft of the elevator hoisting machine can be pulled out from the outside in the axial direction. In the sheave changer for exchanging the cylindrical main sheave suspended on the
The sheave changer can be disposed in the vicinity of the end of the rotary shaft on the side where the main sheave is attached when the main sheave is pulled out of the rotary shaft.
When extracting the main sheave from the rotating shaft, an extraction rod that extends in the direction of the rotating shaft and that can be pushed into the end of the rotating shaft;
When the main sheave is extracted from the rotating shaft, the main sheave is attached to the outer disk surface so as to face the outer disk surface facing the outer side in the rotation axis direction, and is detachably attached to the main sheave. And a sheave extraction plate in which a through hole for extraction through which the rotating shaft and the extraction rod can pass is formed,
The end of the rotating shaft is pushed while keeping the state where the extraction rod passes through the extraction through-hole, and the sheave extraction plate to which the main sheave is fixed is moved in a direction away from the rotation shaft. A drive unit configured in
A sheave changer characterized by comprising: The drive unit is
A linearly moving member configured to move in the axial direction relative to the sheave extracting plate and be connected to the extracting rod so as to be movable integrally with each other, and surrounds the linearly moving member to the sheave extracting plate. A fixing member that is detachably attached directly or indirectly,
The linear moving member is configured to extract the main sheave from the rotating shaft when the extraction rod is linearly pushed toward the rotating shaft;
The sheave changer according to claim 1. The sheave changer is
When the main sheaves are extracted from the rotary shaft, the main sheaves are arranged parallel to the rotary shaft and spaced radially outward from the main sheave, respectively, and each of the sheave extraction plates has the extraction through-hole. A plurality of strut members configured to penetrate a portion other than the hole in the axial direction;
A pedestal portion that can be fixed to each of at least two support members on the side opposite to the side where the main sheave of the sheave extraction plate is attached;
The sheave changer according to claim 2, wherein The sheave changer is
The through hole for fitting is formed in the direction in which the column member extends in parallel with the sheave extraction plate at a distance from each other and penetrates in the axial direction, and each column member is inserted into the through hole for fitting. Having a plate for fitting a sheave that is configured to penetrate through the other part in the direction in which the column member extends,
The sheave fitting plate, the sheave extraction plate, and each support member are integrally formed,
When fitting the main sheave into the rotating shaft,
The main sheave for attachment has a position relative to the sheave fitting plate opposite to the side where the sheave extraction plate is located, and the outer disk surface and the sheave fitting plate are Fixed to face each other,
A mounting bolt is threaded into at least one of the bolt holes through the fitting through hole from the side where the sheave extraction plate is located,
When the mounting bolt is tightened in the direction of the rotating shaft, the main sheave fixed to the fitting plate is pressed against the rotating shaft and fitted into the rotating shaft. Being
The sheave changer according to claim 3. A heating wire that can be attached to and detached from the outer peripheral surface of the main sheave and that can heat the main sheave;
The sheave replacement according to any one of claims 1 to 4, wherein the main sheave is configured to be extracted from the rotating shaft after being heated by the extraction heating wire. apparatus. A cylindrical main sheave mounted on a hoisting machine having a rotating shaft that is horizontally disposed and has a bolt hole formed at an end thereof, rotates together with the rotating shaft, and the main rope is suspended on an outer peripheral surface, and the rotating shaft In the sheave changer that is fitted from the outside in the rotation axis direction so that the end portion of
The sheave exchanging device can be disposed in the vicinity of the end of the rotary shaft on the side where the main sheave is attached when the main sheave is fitted into the rotary shaft.
When the main sheave for attachment is attached to the rotary shaft, the main sheave for attachment is detachably attached, and a plate for fitting a sheave in which a through hole for insertion penetrating in the axial direction is formed;
A mounting bolt that can be inserted into the fitting through hole and screwed into the bolt hole;
Have
The mounting bolt is threaded into at least one of the bolt holes through the fitting through hole,
When the mounting bolt is tightened in the direction of the rotation axis, the main sheave fixed to the sheave insertion plate is pressed toward the rotation shaft and fitted into the rotation shaft to be fixed. That is structured as
Sheave changer characterized by It has a heating wire that can be attached to and detached from the outer peripheral surface of the main sheave and that can heat the main sheave,
The sheave replacement according to any one of claims 4 to 6, wherein the main sheave is configured to be fitted into the rotating shaft after being heated by the heating wire for attachment. apparatus. A car that can move up and down in the hoistway,
A main rope for suspending the car;
There is a horizontal rope and a main rope that is fitted in such a manner that it can be removed from the outside in the axial direction so that one end of the rotary shaft passes through, and rotates together with the rotary shaft to move the elevator car up and down. A hoisting machine having a cylindrical main sheave suspended on the outer peripheral surface;
A sheave changer that can be arranged in the vicinity of an end of the rotary shaft on the side where the main sheave is attached;
In an elevator having
The sheave changer is
When extracting the main sheave from the rotating shaft, an extraction rod that extends in the direction of the rotating shaft and that can be pushed into the end of the rotating shaft;
When the main sheave is extracted from the rotating shaft, the main sheave is attached to the outer disk surface so as to face the outer disk surface facing the outer side in the rotation axis direction, and is detachably attached to the main sheave. And a sheave extraction plate in which a through hole for extraction through which each of the rotating shaft and the extraction rod can pass is formed;
The end of the rotating shaft is pushed while keeping the state where the extraction rod passes through the extraction through-hole, and the sheave extraction plate to which the main sheave is fixed is moved in a direction away from the rotation shaft. A drive unit configured in
The elevator characterized by having. A car that can move up and down in the hoistway,
A main rope for suspending the car;
A rotating shaft that is horizontally disposed and has a bolt hole formed at an end thereof, and is fitted in a removable manner from the outside in the rotating shaft direction so that the end of the rotating shaft penetrates and rotates together with the rotating shaft on the outer peripheral surface A cylindrical main sheave around which the main rope is suspended;
A sheave changer that can be arranged in the vicinity of an end of the rotary shaft on the side where the main sheave is attached;
In an elevator having
The sheave changer is
When the main sheave for attachment is attached to the rotary shaft, the main sheave for attachment is detachably attached, and a plate for fitting a sheave in which a through hole for insertion penetrating in the axial direction is formed;
A mounting bolt that can be inserted into the fitting through hole and screwed into the bolt hole;
Have
The mounting bolt is threaded into at least one of the bolt holes through the fitting through hole,
When the mounting bolt is tightened in the direction of the rotation axis, the main sheave fixed to the sheave insertion plate is pressed toward the rotation shaft and fitted into the rotation shaft to be fixed. That is structured as
An elevator characterized by. In the sheave extraction method for extracting the main sheave fitted in the hoist arranged above the hoistway,
The main sheave has a main rope that rotates with the rotary shaft so that one end of a horizontal rotary shaft of the hoisting machine passes therethrough and is detachable and moves the elevator car up and down. A cylindrical shape that can be suspended on
The sheave sampling method is
A first member attaching step for removably attaching a first member formed with a through hole through which the rotary shaft can penetrate on one disk surface of the main sheave;
After the first member attaching step, a second member attaching step for attaching the rod-like second member extending in the axial direction to the end portion of the rotating shaft through the extraction through hole;
After the second member attaching step, the first member and the main sheave are moved away from the rotating shaft while pushing the end of the rotating shaft with the second member, A sheave extraction process for extracting the main sheave;
A sheave extraction method characterized by comprising: In a sheave fitting method for attaching a main sheave to a hoisting machine having a rotating shaft that is arranged above a hoistway and has a bolt hole formed at one end thereof,
The main sheave is a cylindrical shape that can be fitted so that the end of the rotating shaft penetrates, can rotate with the rotating shaft, and can suspend a main rope that moves the elevator car up and down on the outer peripheral surface,
The sheave fitting method is
A first member attaching step of detachably attaching the first member formed with a fitting through-hole through which the attaching bolt can pass, to one disk surface of the main sheave;
After the first member attaching step, the main sheave arranging step of arranging the main sheave fixed to the first member in the vicinity of the end of the rotating shaft;
After the main sheave arranging step, a bolt mounting step of passing the mounting bolt through the fitting through hole and screwing into the bolt hole formed in the end portion;
A sheave fitting step of fitting the main sheave fixed to the first member into the rotating shaft while tightening the mounting bolt in the rotating shaft direction after the bolt attaching step;
A sheave fitting method characterized by comprising:

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