JP5591767B2 - Thin hoisting machine and elevator equipment - Google Patents

Description

  The present invention relates to a thin hoist arranged in a hoistway and an elevator apparatus using the same.

  Generally, hoisting machines and motor control devices for raising and lowering the elevator car, or speed governors used for emergency braking when the car accelerates are installed in the machine room at the top of the building. Has been. However, so-called machine room-less elevators in which a machine room is not provided are widely used in elevators in which the elevator car has a relatively slow lifting speed. In the case of this machine room-less elevator, all equipment including the hoisting machine that has been installed in the machine room is installed in the hoistway. Normally, the clearance between the carriage and the hoistway wall is about several hundred mm. Therefore, it is necessary to install a hoisting machine in the gap.

  Conventionally, as a technology for downsizing a hoisting machine, a sheave, a motor rotor, and a brake disc for a disc brake are integrally formed by casting (see, for example, Patent Document 1), an inner peripheral surface of a motor rotor, There are known ones in which the outer peripheral surface is a braking surface of a drum brake (see, for example, Patent Documents 2 and 3).

JP 2005-247514 A International Publication Number WO2004 / 108579 JP 2009-155070 A

  However, the thin hoist including the above-mentioned Patent Documents 1-3 has not been considered for maintenance when installed in a narrow space in the hoistway. For this reason, even if maintenance of the thin hoisting machine is performed after moving the car to a position that does not overlap the thin hoisting machine in the height direction, it is still surrounded by the hoistway wall, the counterweight and the guide rail, etc. Since it is performed in a narrow space, it is a very narrow work. In addition, the inspection and replacement work for checking the degree of wear of the brake pads had to be done by dismantling the thin hoist.

  An object of the present invention is to provide a thin hoisting machine and an elevator apparatus that can easily maintain a brake pad and can be downsized as a whole.

To achieve the above object, the present invention is formed integrally with a housing, a main shaft that is cantilevered and supported on the housing, a sheave rotatably attached to the other end of the main shaft, and the sheave. A brake drum, an electromagnetic brake device supported by the housing so as to be braked by bringing a brake pad into contact with a brake annular end member formed integrally with an outer peripheral portion of the brake drum, and the brake In a thin hoisting machine comprising: a motor rotor fixed to the inner peripheral surface side of the annular end member for use; and a motor stator disposed opposite to the motor rotor and fixed to the housing. An annular outer peripheral portion extending in the axial direction of the main shaft is formed in the portion, and an annular strength wall continuous in the circumferential direction surrounding the main shaft is left inside the annular outer peripheral portion, and is positioned outside the strength wall. The brake pad on the annular outer periphery The braking contact surface to form a cutout window to allow visual observation, the annular outer peripheral portion, and a stepped an increased inner diameter as it approaches the inner surface side of the brake drum side, the inner diameter of the housing is small smaller diameter An inner surface, a large-diameter inner surface having a large inner diameter located on the brake drum side, and an intermediate end surface connecting the both inner surfaces are formed, and the small-diameter inner surface has a diameter larger than an inner diameter surface of the braking annular end member. A large gap is formed between the outer peripheral portion of the motor rotor and a radial gap is formed between the outer peripheral portion and the outer peripheral surface of the braking annular end member. The intermediate end face is formed to be opposed to the braking annular end member with a gap in the axial direction .

According to such a configuration, it becomes possible to visually check the damaged state of the braking contact surface of the brake pad using the notch window portion without performing the narrowing work of disassembling the thin hoisting machine. In addition, when forming a notch window portion in the housing to visually check the state of the braking contact surface of the brake pad, the strength wall is left in an annular shape. It is possible to make the thin hoisting machine small and excellent in maintainability while maintaining the appropriate strength. In addition, the brake annular end member of the brake drum is disposed close to the inside of the large-diameter inner surface, and the small-diameter inner surface can be brought close to the outer peripheral surface of the motor rotor. While enabling visual inspection of the braking contact surface, a small thin hoisting machine can be configured by reducing the outer diameter of the annular outer peripheral portion.

  Further, according to the present invention, in addition to the above configuration, the notch window portion has a width in the same direction that is larger than a width in the circumferential direction of the brake pad, and the shaft in the annular outer circumferential portion. It is characterized by being formed by opening both ends in the direction.

  According to such a configuration, when it is determined that the brake pad needs to be replaced by visual inspection of the braking contact surface, the brake pad is taken out using the notched window portion without disassembling the thin hoisting machine. Similarly, a new brake pad can be inserted and arranged using the cutout window. In the case of an annular outer peripheral portion that does not have such a notch window portion, a radial through-hole is formed in the annular outer peripheral portion to allow the brake pad to operate during braking. Since the through-hole can also be used, the braking annular end member formed on the brake drum and the braking contact surface of the brake pad can be arranged close to the sheave side, and the bias to the brake drum when braking is applied. The load can be reduced and the size of the thin hoisting machine can be reduced by preventing the brake drum from becoming larger.

The present invention further includes a housing, a main shaft that is cantilevered and supported on the housing, a sheave rotatably attached to the other end of the main shaft, a brake drum that is formed integrally with the sheave, An electromagnetic brake device supported by the casing so as to brake the brake annular end member formed integrally with the outer periphery of the brake drum by contacting the brake pad; and the brake annular end member A motor rotor fixed to the inner peripheral surface, and a motor stator that is disposed opposite to the motor rotor and fixed to the housing constitute a thin hoist, and the motor rotor and the sheave of the sheave In an elevator apparatus that lifts and lowers a car and a counterweight through a main rope wound around the sheave by rotation, the thin hoisting machine is arranged with the housing facing the car side, and In the axial direction on the outer periphery of the housing Forming an annular outer peripheral portion, leaving an annular strength wall continuous in the circumferential direction surrounding the main shaft inside the annular outer peripheral portion, and the brake pad on the annular outer peripheral portion located outside the strength wall A notch window portion is formed so that the braking contact surface can be visually observed, and the annular outer peripheral portion has a stepped shape in which the inner diameter increases toward the brake drum side and the inner diameter of the housing is small. A small inner surface, a large inner surface having a large inner diameter located on the brake drum side, and an intermediate end surface connecting the both inner surfaces, the smaller inner surface being more than the inner diameter surface of the braking annular end member A large gap is formed to oppose the outer periphery of the motor rotor by forming a radial gap, and the inner surface of the large diameter is a radial gap between the outer peripheral surface of the braking annular end member. Formed opposite to each other, and said inside Part end face, characterized in that placed opposite a gap on the braking annular end member axially.

According to such a configuration, it becomes possible to visually confirm the state of the braking contact surface of the brake pad using the notch window without performing the narrowing work of disassembling the thin hoist, In addition, when forming a notch window part in the housing to visually check the state of the braking contact surface of the brake pad, a thin hoisting machine was configured with an annular strength wall remaining, so compared with the case where the annular outer peripheral part was divided in the circumferential direction. Thus, the thin hoisting machine can be reduced in size while maintaining the mechanical strength of the casing, and components such as the thin hoisting machine can be arranged in a limited space in the hoistway. . In addition, the brake annular end member of the brake drum is disposed close to the inside of the large-diameter inner surface, and the small-diameter inner surface can be brought close to the outer peripheral surface of the motor rotor. While enabling the visual inspection of the braking contact surface, the outer diameter of the annular outer peripheral part can be reduced to form a small thin hoisting machine, and the thin hoisting machine can be installed in a limited space in the hoistway. Can be arranged and configured.

  Further, in the present invention, the cutout window portion has a width that allows the brake pad to be inserted and removed in the same direction, which is larger than the width in the circumferential direction of the brake pad, and opens both ends in the axial direction of the annular outer peripheral portion. It is characterized by having formed.

  According to such a configuration, when it is determined that the brake pad needs to be replaced by visual inspection of the braking contact surface, the brake pad is taken out using the notched window portion without disassembling the thin hoisting machine. Similarly, a new brake pad can be inserted and arranged using the cutout window. In the case of an annular outer peripheral portion that does not have such a notch window portion, a radial through-hole is formed in the annular outer peripheral portion to allow the brake pad to operate during braking. Since the through-hole can also be used, the braking annular end member formed on the brake drum and the braking contact surface of the brake pad can be arranged close to the sheave side, and the bias to the brake drum when braking is applied. The load can be reduced, the size of the thin hoisting machine can be reduced by preventing the brake drum from becoming larger, and components such as the thin hoisting machine are arranged in a limited space in the hoistway. be able to.

  According to the present invention, the state of the braking contact surface of the brake pad can be visually confirmed using the cutout window portion without performing the narrowing work of disassembling the thin hoisting machine. The mechanical strength of the housing compared to the case where the annular outer periphery is divided in the circumferential direction because the notched window is formed in the housing to visually check the state of the braking contact surface of the pad. The thin hoisting machine can be made compact and excellent in maintainability.

It is sectional drawing which shows the principal part of the thin winding machine by one embodiment of this invention. It is sectional drawing which shows the whole structure of the thin hoist shown in FIG. It is a front view of the thin hoist shown in FIG. FIG. 3 is a side view of the thin hoist shown in FIG. 2. FIG. 3 is a rear view of the thin hoist shown in FIG. 2. It is sectional drawing of the elevator apparatus which uses the thin hoist shown in FIG. It is sectional drawing of the thin hoisting machine by other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 6 is a cross-sectional view of an elevator apparatus using a thin hoist according to an embodiment of the present invention. In the hoistway 1, a car 3 that can be raised and lowered along a pair of guide rails 2 and a counterweight 5 that is connected to the car 3 by a main rope (not shown) and can be raised and lowered along a pair of guide rails 4. And a thin hoisting machine 6 installed in a gap between the hoistway 1 and the car 3. The thin hoisting machine 6 will be described in detail later, but a stationary casing 7 is positioned on the car 3 side, and a sheave 8 that is rotatable with respect to the casing 7 is positioned on the hoistway wall side. I am letting.

  The thin hoisting machine 6 is wound so that a plurality of main ropes connecting the car 3 and the counterweight 5 are respectively matched with a plurality of grooves formed in the sheave 8. When the main rope is driven by the rotation, the car 3 and the counterweight 5 are configured to move up and down in the opposite directions along the respective guide rails 2 and 4.

  3, 4, and 5 are a front view, a side view, and a rear view of the above-described thin hoisting machine 6. A brake drum 9 is integrally coupled to the outer peripheral portion of the sheave 8, and a housing 7 is disposed on the side of the car 3 of the brake drum 9, and the sheave 8 and the brake drum are disposed with respect to the housing 7. 9 is supported in a rotatable relationship. As will be described in detail later, an outer rotor type motor is formed in the fitting facing portion of the sheave 8 or the brake drum 9 and the housing 7, and the rotor of the outer rotor type motor is attached to the outer periphery of the brake drum 9. The stator of the outer rotor type motor is attached to the facing portion of the housing 7. The outer rotor type motor integrally rotates the movable part represented by the sheave 8 and the brake drum 9 by energization. However, the energization is interrupted and the electromagnetic brake device 10 having the same configuration is arranged at the upper and lower parts of the housing 7 respectively. , 11 brake pads 12 and 13 are pressed against the brake drum 9 for braking.

  FIG. 2 is a cross-sectional view of the thin hoisting machine 6. The casing 7 is made of cast iron and machined after being roughly shaped, and has a boss 14 for supporting the spindle at the center. In addition, the outer periphery has an annular outer periphery described later. One end of the main shaft 15 in the axial direction is fitted and fixed to the boss portion 14 formed at the center of the housing 7, and a bearing housing 17 is connected to the other end of the main shaft 15 in the axial direction via a bearing 16. The sheave 8 and the brake drum 9 are integrally coupled to the bearing housing 17. Both ends of the bearing 16 in the axial direction are sealed by bearing covers 18 and 19 fixed to the bearing housing 17. In this way, the casing 7 that is the fixed portion, the sheave 8 that is the movable portion, the brake drum 9, and the bearing housing 17 are disposed opposite to each other on both ends of the main shaft 15.

  The casing 7 has a boss portion 14, an annular mounting portion 20 formed in an annular shape in the circumferential direction at the outer peripheral portion of the boss portion 14, and an outer periphery of the annular mounting portion 20. And an annular outer peripheral portion 21 which is also formed in an annular shape in the circumferential direction, and an annular concave portion 22 is formed between the annular mounting portion 20 and the annular end surface 21. Thus, the housing 7 has a bottomed annular shape with the sheave 8 side opened as a whole. The annular mounting portion 20 may be continuous in the circumferential direction or may be divided in the circumferential direction.

  In the annular recess 22, an annular motor stator 23 fixed to the annular mounting portion 20 in the housing 7, and an outer peripheral portion of the motor stator 23 are arranged with a predetermined gap and the brake drum 9. An annular motor rotor 24 fixed to the motor is disposed. More specifically, the motor stator 23 is configured by winding a stator winding 26 around a stator core 25 made of laminated electromagnetic steel plates, and is fixed to the annular mounting portion 20 of the housing 7 within the annular recess 22. Has been. On the other hand, the motor rotor 24 includes a mover iron core 27 fixed to the brake drum 9 and a plurality of permanent magnets 28 attached to the inner peripheral surface of the mover iron core 27. Permanent magnets 28 arranged opposite to the iron core 25 with a predetermined gap are arranged so that N poles and S poles alternate in the circumferential direction.

  The brake drum 9 has a braking annular end member 29 integrally formed on the outer peripheral portion of the plate-like base fixed to the sheave 8, and a motor is provided on the inner peripheral surface of the braking annular end member 29. A mover iron core 27 in the rotor 24 is fixed. The mover iron core 27 rotates in the annular recess 22, and a predetermined gap is formed so that the mover iron core 27 does not contact the inner surface of the annular outer peripheral portion 21 at this time.

  The electromagnetic brake devices 10 and 11 that are supported and fixed by a support portion (not shown) are disposed in the casing 7 that is located outside the annular outer peripheral portion 21. The electromagnetic brake devices 10 and 11 are in a steady state. The brake pads 12 and 13 are kept away from the braking annular end member 29 of the brake drum 9, but when braking the sheave 8, the brake pads 12 and 13 are braked by electromagnetic force. In this configuration, the annular end member 29 is driven to be pressed.

  Next, the detailed main part structure of the thin hoist 6 will be further described with reference to FIG. The electromagnetic brake devices 10 and 11 have the same configuration. Here, the electromagnetic brake device 10 will be described as a representative. The electromagnetic brake device 10 presses the brake pad 12 against the outer peripheral surface of the braking annular end member 29 formed on the outer peripheral portion of the brake drum 9 to brake the rotation of the brake drum 9 and the sheave 8. Since the braking contact surface wears out, it is necessary to perform periodic inspection or replacement work. The brake contact surface is preferably inspected from the side of the car 3 shown in FIG. 6 so as not to be an extremely narrow work, so that the wear of the brake contact surface is visually inspected as shown in FIG. A notch window 34 is formed on the side of the car 3 of the annular outer peripheral portion 21 formed in the casing 7 and on the upper portion. The annular outer peripheral portion 21 is annular and formed continuously in the circumferential direction, but the cutout window portion 34 is formed not only on the entire circumference but only on a position corresponding to the brake pad 12.

  The circumferential width of the notch window 34 may be a width that allows the braking contact surface of the brake pad 12 to be visually observed, but here it is slightly larger than the circumferential width of the brake pad 12. It can be used for taking in and out. Further, if the axial length of the cutout window 34 is from the car 3 side of the annular outer peripheral part 21 to the position of the brake pad 12, the braking contact surface of the brake pad 12 can be visually confirmed from the car 3 side. In this case, the annular outer peripheral portion 21 is formed to have substantially the same width continuously from the car 3 side to the sheave 8 side.

  Maintenance of the thin hoisting machine 6 is performed by a maintenance worker from the side where the car 3 is located by raising the car 3 to a position that does not overlap the thin hoisting machine 6 in the height direction. At this time, since the guide rails 2 and 4 and the counterweight 5 are still present around the thin hoisting machine 6 in the hoistway 1, the work becomes narrow. However, without disassembling the thin hoist 6, the braking contact surface of the brake pad 12 can be visually observed from the side of the car 3 through the cutout window 34, and the replacement work is performed according to the wear situation. Become.

  The notch window 34 can be formed by cutting the entire thickness of the annular outer peripheral portion 21 in the radial direction. However, the annular outer peripheral portion 21 is cut in the radial direction, in the figure, in the vertical direction. The annular strength wall 33 that is continuous in the circumferential direction surrounding the main shaft 15 is left without being formed as the notch window portion 34. By leaving the strength wall 33, the annular outer peripheral portion 21 still has a continuous annular shape in the circumferential direction despite having the cutout window portion 34. Accordingly, the casing 7 is a strength member having sufficient mechanical strength by the strength wall 33 continuous in the circumferential direction.

  As described above, the housing 7 used as the thin hoist 6 supports and fixes one end of the main shaft 15 in the axial direction, and rotatably supports the sheave 8 and the like on the other end of the main shaft 15 in the axial direction. Since the main rope (not shown) is wound around the sheave 8 and the car 1 is moved up and down by the rotation, the casing 7 receives an unbalanced load via the cantilevered main shaft 15. It will be. Therefore, the casing 7 needs to be a strength member that can withstand this. However, as described above, the casing 7 is still a strength member because the casing 7 has the strength wall 33 so as to maintain an annular shape that is continuous in the circumferential direction despite the notch window portion 34. By improving the strength and rigidity of the entire 7, it is possible to reduce the size of the casing 7, that is, the size of the thin hoisting machine 6.

  In the preferred embodiment, the circumferential width of the cutout window 34 is set to be larger than the degree of visual confirmation of the braking contact surface of the brake pad 12 and slightly larger than the circumferential width of the brake pad 12. For this reason, when the brake pad 12 is configured to be removable as the electromagnetic brake device 10, when it is determined that the brake pad 12 needs to be replaced by visual inspection of the braking contact surface, the brake is made using the cutout window portion 34. The pad 12 is taken out, and a new brake pad can be inserted and arranged using the cutout window 34 in the same manner. For this reason, it is possible to replace the brake pad 12 without disassembling the thin hoisting machine 6 every time it is inspected or replaced, and the maintainability can be improved.

  Further, paying attention to the structure of the main part, the annular outer peripheral portion 21 formed on the outer peripheral portion of the housing 7 is formed in an annular shape in the circumferential direction surrounding the outer peripheral portion of the main shaft 15 and protrudes in the axial direction, that is, the brake drum 9 side by a predetermined length. However, the inner surface has a stepped shape with an increased inner diameter as it approaches the brake drum 9, a small inner surface 30 with a small inner diameter located on the base side of the housing 7, and a diameter with a large inner diameter located on the sheave 8 side. It has a large inner surface 31 and an intermediate end surface 32 that is a portion connecting these two inner surfaces. The small-diameter inner surface 30 has a slightly larger diameter than the inner diameter surface of the braking annular end member 29 formed on the brake drum 9, and the outer peripheral portion of the mover iron core 27 constituting the motor rotor 24 fixed to the brake drum 9. A gap is formed between the two. The large-diameter inner surface 31 is slightly larger than the outer peripheral surface of the braking annular end member 29 formed on the brake drum 9, and a gap is formed between the two, so that the brake drum 9 does not contact when rotating. Absent. Further, the intermediate end face 32 has a gap in the axial direction with the brake annular end member 29 formed on the brake drum 9, and the brake drum 9 does not come into contact with the intermediate end face 32 during rotation.

  With such a configuration, the braking annular end member 29 of the brake drum 9 can be disposed inside the large-diameter inner surface 31, and the outer peripheral surface of the braking annular end member 29 can be brought close to the large-diameter inner surface 31. Even when the small-diameter inner surface 30 is brought close to the outer peripheral surface of the mover core 27, the braking contact surface of the brake pad 12 is still located in the vicinity of the boundary portion between the notch window portion 34 and the strength wall 33. Accordingly, it is possible to configure the small thin hoist 6 by reducing the outer diameter of the annular outer peripheral portion 21 while enabling visual inspection of the braking contact surface of the brake pad 12 from the cutout window portion 34. Further, since the casing 7 and the brake drum 9 can be brought close to each other until a predetermined gap is maintained between the intermediate end face 32 and the brake annular end member 29, the thin hoisting machine 6 can be reduced in the axial direction. can do.

  Further, as described above, the casing 7 can be reduced in size in the radial direction because the inner surface 30 with a small diameter can be reduced to the inner peripheral surface of the braking annular end member 29 in the brake drum 9. Can be

  In the conventional thin hoisting machine, the inner surface of the annular outer peripheral portion 21 formed in the housing 7 is straight over the entire axial direction, and the entire outer periphery including the outer peripheral portion of the brake annular end member 29 in the brake drum 9 is annular outer peripheral. Since it arrange | positions in the part 21, the diameter of the annular outer peripheral part 21 formed in the housing 7 was large. However, in the case of the present embodiment, the inner surface of the annular outer peripheral portion 21 formed on the housing 7 is stepped, and the braking annular end member 29 is not disposed inside the small-diameter inner surface 30, but the large-diameter inner surface 31. Since the brake annular end member 29 is disposed inside the casing 7, the casing 7, which is a strength member, can be downsized in the radial direction.

  As a result, the vicinity of the contact surface between the brake annular end member 29 and the brake pad 12 can be positioned in the vicinity of the boundary between the notch window portion 34 and the strength wall 33. While the strength wall 33 is formed on 21, the wear state of the contact surface of the brake pad 12 can be visually confirmed from the car 1 side.

  Moreover, if the thickness of the annular outer peripheral portion 21 is not changed, the strength wall 33 of the housing 7 is as thick as possible and the notch window 34 is made as thin as possible to increase the mechanical strength of the housing 7. be able to. As described above, since the diameter of the annular outer peripheral portion 21 is smaller than the conventional one, even if the strength wall 33 is sufficiently thick, the brake pad 12 and the brake are located near the boundary surface between the notch window portion 34 and the strength wall 33. The braking contact surface of the drum 9 with the braking annular end member 29 can be positioned, and the degree of wear of the brake pad 12 can be easily visually confirmed through the notch window 34.

  Normally, the brake drum 9 integrally forms a braking annular end member 29 at the outer peripheral end of the disc-like base portion, so that a contact portion when the brake pad 12 is pressed against the braking annular end member 29 is provided. If the sheave 8 side is as much as possible, the uneven load on the brake drum 9 can be reduced, which is useful for miniaturization. As described above, the notch window portion 34 has a circumferential width that is slightly larger than the width of the brake pad 12 in the same direction, not just the circumferential width that allows visual inspection of the braking contact surface of the brake pad 12. And it forms continuously to the sheave 8 side which is not directly related to visual inspection.

  In the case of the annular outer peripheral portion 21 that does not have such a notch window portion 34, a radial through hole is formed in the annular outer peripheral portion 21 in order to allow the brake pad 12 to operate during braking. The window 34 can also serve as this through hole, and the braking annular end member 29 formed on the brake drum 9 and the braking contact surface of the brake pad 12 are brought close to the sheave 8 side, that is, the right side in the drawing. Can be placed.

  Therefore, the outer peripheral surface of the braking annular end member 29 with which the braking contact surface of the brake pad 12 contacts is brought close to the vicinity of the disc-shaped base portion of the brake drum 9 by using the notch window portion 34 as described above. Therefore, the uneven load on the brake drum 9 when the brake pad 12 is pressed against the braking annular end member 29 for braking can be reduced. As a result, the brake drum 9 can be prevented from being enlarged, and the thin hoist 6 can be reduced in size.

  FIG. 7 is a cross-sectional view showing a thin hoisting machine 6 according to another embodiment of the present invention. The same components as those of the embodiment shown in FIG. . 2 is a cross-sectional view in the vertical direction, whereas FIG. 7 is a cross-sectional view in the horizontal direction, so that the electromagnetic brake devices 10 and 11 provided in a pair in the vertical direction do not appear. An annular outer peripheral portion 21 formed on the outer peripheral portion of the housing 7 has a small inner surface 30 with a small inner diameter located on the base side of the housing 7 on the inner peripheral side, and a large inner surface with a large inner diameter located on the sheave 8 side. 31 and an intermediate end face 32 that connects both inner surfaces, and has a stepped shape in which the inner diameter increases as it approaches the brake drum 9. On the other hand, the outer peripheral side of the annular outer peripheral portion 21 has a step shape corresponding to the step shape on the inner peripheral side. Specifically, the outer peripheral surface at a position substantially corresponding to the small-diameter inner surface 30 is cut over the entire circumferential direction, and an annular small-diameter strength wall 33 located on the car side and an annular located on the sheave 8 side. The outer peripheral portion of the annular outer peripheral portion 21 is stepped by the large diameter portion 35.

  Accordingly, at a position corresponding to an electromagnetic brake device (not shown), a part of the notch window portion 34 shown in FIG. 1 is already formed by the circumferentially continuous cutting portion 36 described above. If a notch having a circumferential width substantially the same as that of the brake pad 12 is formed, an equivalent to the notch window 34 shown in FIG. 1 can be obtained. The wear state of the braking contact surface of the brake pad 12 can be visually inspected and the brake pad 12 can be replaced according to the wear state through the equivalent of the cutout window portion 34.

  Further, at the position corresponding to the electromagnetic brake device, the large-diameter portion 35 is divided in the circumferential direction by the formation of the notch window portion 34, but the strength wall 33 is circumferentially formed as in the case of the previous embodiment. Since it is continuous, sufficient mechanical strength of the housing 7 can be maintained, and the same effect can be obtained. The above-described thin hoisting machine 6 can be handled as the thin hoisting machine 6 alone, or can be handled as the thin hoisting machine 6 incorporated in the elevator apparatus. The casing 7 is arranged and used so as to face the car 3 side.

  As described above, according to the thin hoisting machine 6 of the present invention, when the notched window portion 34 for visually observing the state of the braking contact surface of the brake pads 12 and 13 is formed in the housing 7, the annular outer peripheral portion 21 is formed into a circular shape. Since the strength wall 33 which continues in the circumferential direction remains, the maintainability is improved, and the thin hoisting is performed while improving the mechanical strength of the casing 7 as compared with the case where the annular outer peripheral portion 21 is divided in the circumferential direction. The machine 6 can be reduced in size.

  The elevator apparatus according to the present invention is arranged in the hoistway 1 so that the housing 7 side of the thin hoist 6 faces the car 3, and the state of the braking contact surfaces of the brake pads 12, 13 is visually checked. When the notch window portion 34 is formed in the housing 7, the thin hoist 6 is configured by leaving the strength wall 33 continuous in the circumferential direction of the annular outer peripheral portion 21, thereby improving the maintainability and improving the annular outer peripheral portion 21. The thin hoisting machine 6 can be reduced in size while maintaining the mechanical strength of the housing 7 as compared with the case where it is divided in the circumferential direction, and the thin hoisting machine 6 is installed in a limited space in the hoistway. The first component device can be arranged and configured.

  In each embodiment of the present invention, a laminated magnetic steel sheet is used as the mover iron core 27 constituting the motor rotor 24. Therefore, the generated iron loss can be suppressed and the motor efficiency can be improved. However, instead of this, a magnetic material such as cast iron or carbon steel may be used. When cast iron is used, it can be integrally formed with the brake drum 9. The motor rotor 24 is a surface magnet type in which a plurality of permanent magnets 28 are attached to the inside of the mover iron core 27, but may be an embedded magnet type in which permanent magnets are embedded in the mover iron core 27.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Guide rail 3 Car 4 Guide rail 5 Counterweight 6 Thin hoist 7 Case 8 Sheave 9 Brake drum 1O Electromagnetic brake device 11 Electromagnetic brake device 12 Brake pad 13 Brake pad 14 Boss part 15 Main shaft 16 Bearing 17 bearing housing 18 bearing cover 19 bearing cover 20 annular mounting portion 21 annular outer peripheral portion 22 annular recess 23 motor stator 24 motor rotor 25 stator core 26 stator winding 27 mover iron core 28 permanent magnet 29 annular for braking End member 30 Small inner surface 31 Large inner surface 32 Intermediate end surface 33 Strength wall 34 Notch window portion 35 Large diameter portion 36 Cutting portion

Claims (4)

A housing, a main shaft that is cantilevered and supported on the housing, a sheave rotatably attached to the other end of the main shaft, a brake drum formed integrally with the sheave, and an outer peripheral portion of the brake drum An electromagnetic brake device that is supported by the housing so that the brake pad is brought into contact with the brake annular end member formed integrally with the brake to be braked, and an inner peripheral surface side of the brake annular end member In a thin hoist equipped with a fixed motor rotor and a motor stator that is disposed opposite to the motor rotor and fixed to the housing,
An annular outer peripheral portion extending in the axial direction of the main shaft is formed on the outer peripheral portion of the casing, and an annular strength wall continuous in the circumferential direction surrounding the main shaft is left inside the annular outer peripheral portion. A notch window portion is formed in the annular outer peripheral portion located on the outer side so that the braking contact surface of the brake pad can be visually observed , and the inner diameter of the annular outer peripheral portion increases as the inner surface approaches the brake drum side. In a stepped shape, a small-diameter inner surface with a small inner diameter of the housing, a large-diameter inner surface with a large inner diameter located on the brake drum side, and an intermediate end surface connecting the both inner surfaces, the small-diameter inner surface, The brake annular end member has a diameter larger than the inner diameter surface of the brake rotor and is opposed to the outer peripheral portion of the motor rotor by forming a radial gap, and the large-diameter inner surface is the brake annular end The radial direction between the outer peripheral surface of the member Face to form a cap and said intermediate portion end face, the flat type hoist, characterized in that placed opposite a gap on the braking annular end member axially.   The cut-out window portion has a width that can be taken in and out in the same direction larger than the width in the circumferential direction of the brake pad, and is formed by opening both axial ends of the annular outer peripheral portion. 2. A thin hoist according to claim 1. A housing, a main shaft that is cantilevered and supported on the housing, a sheave rotatably attached to the other end of the main shaft, a brake drum formed integrally with the sheave, and an outer peripheral portion of the brake drum An electromagnetic brake device supported by the housing so as to brake the brake annular end member formed integrally with the brake pad, and fixed to the inner peripheral surface of the brake annular end member And a motor stator disposed opposite to the motor rotor and fixed to the housing to constitute a thin hoist, and the sheave is rotated by the rotation of the motor rotor and the sheave. In the elevator apparatus that drives the elevator car and the counterweight through the main rope wound around
In the thin hoisting machine, the casing is disposed toward the car side, an annular outer peripheral portion extending in the axial direction is formed on the outer peripheral portion of the casing, and the main shaft is disposed inside the annular outer peripheral portion. A notch window portion is formed in the annular outer peripheral portion located outside the strength wall so that the braking contact surface of the brake pad can be visually observed, while leaving a circumferential annular strength wall surrounding the surrounding wall. The outer peripheral portion has a stepped shape with an inner diameter increased as the inner surface side approaches the brake drum side, a small inner surface with a small inner diameter of the housing, a large inner surface with a large inner diameter located on the brake drum side, An intermediate end face connecting the two inner faces, and the inner diameter face is larger in diameter than the inner diameter face of the braking annular end member, and a radial gap is formed between the outer peripheral part of the motor rotor Forming the opposite, said diameter The inner surface is opposed to the outer circumferential surface of the braking annular end member by forming a radial gap, and the intermediate end surface has an axial gap with the braking annular end member. An elevator apparatus characterized by being disposed opposite to each other . The cut-out window portion has a width that can be taken in and out in the same direction larger than the width in the circumferential direction of the brake pad, and is formed by opening both axial ends of the annular outer peripheral portion. The elevator apparatus according to claim 3 .

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