JP2010235266A - Thin type hoisting machine and driving motor for thin type hoisting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin type hoisting machine capable of being applied as one for an elevator without a machine room for braking an outer peripheral surface of a brake drum and being miniaturized by utilizing an efficient output of an electromagnetic brake device. <P>SOLUTION: In external shape and dimension of the electromagnetic brake device 6 on an upper side of a body 1 of equipment, of the electromagnetic brake devices 6 oppositely installed at two upper and lower portions, thickness (axial direction thickness) is made smaller than that of the whole of the hoising machine, and a width Lw of a direction between two traveling parts 20a and 20b of a rope 20 to be a width direction is made smaller than a distance between the traveling parts 20a and 20b (which is substantially the same as a diameter of a sheave 2). The electromagnetic brake device 6 is capable of exerting high output efficiency, while maintaining the output level and being compactly constituted, since the electromagnetic brake device 6 has the cross-sectional shape close to a square and does not become slender. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine, and more particularly to a thin hoisting machine for a machine room-less elevator and a driving motor for the thin hoisting machine.

  Conventionally, in an elevator, a hoisting machine and a motor control device for raising and lowering the elevator car up and down in a hoistway, or a speed governor used for emergency braking when the car is overspeeded, In particular, it is installed in the machine room at the top of the building. On the other hand, an elevator without a machine room, which is commonly called a machine room-less elevator, is provided. This type of elevator is used for an elevator in which the elevator is relatively slow.

  In the case of a machine room-less elevator, it is necessary to install all devices installed in the machine room, such as a hoisting machine and a control device, in the hoistway, and the hoisting machine must be installed in the hoistway. There are various types and installation forms of the hoisting machine. For example, in a form in which the hoisting machine is installed in a gap of about several hundred mm between the carriage and the hoistway wall, a thin flat hoisting machine is used. A so-called thin hoisting machine is used.

  For thin hoisting machines that brake the outer peripheral surface of the brake drum, conventionally, the brake lever (brake arm) and brake pad (shoe) that form part of the electromagnetic brake device are located at two locations on the left and right sides of the outer part of the thin hoisting machine. It is attached (for example, refer to Patent Documents 1 and 2).

  In addition, regarding a general hoisting machine that brakes the outer peripheral surface of the brake drum, in order to save the installation space of the hoisting machine, the electromagnetic brake device is concentrated on the left and right or upper and lower sides of the hoisting machine, and the electromagnetic brake device is installed. When it is consolidated to the left and right, it is possible to save the space in the vertical direction of the hoisting machine, and when the electromagnetic brake device is concentrated up and down, the space in the left and right direction of the hoisting machine must be saved. Has been proposed (see Patent Document 3).

  FIG. 10 is a schematic view showing a hoistway cross section of a machine room-less elevator using a thin hoist. As shown in FIG. 10, the thin hoist 18 is generally installed facing the hoistway wall 16 in a gap of about several hundred mm between the hoistway 15 and the car 17. Furthermore, a counterweight 19 is arranged on the side of the hoisting machine 18. That is, the thin hoisting machine 18 is installed in a manner surrounded by the hoistway wall 16, the car 17 and the counterweight 19. If the thin hoisting machine 18 can be reduced in size, the cross-sectional area of the hoistway 15 can be reduced, or the degree of freedom of layout of devices in the hoistway 15 can be increased. . Therefore, downsizing of the thin hoisting machine 18, specifically reduction of the thickness and width dimension of the hoisting machine 18 is a very important matter in the elevator.

  On the other hand, regarding the height dimension of the entire hoisting machine, the hoistway has a wide space in the height direction, so the advantage of reducing the height dimension is small. That is, even if the height of the entire hoisting machine is sacrificed, the value of the machine room-less elevator can be increased if the thickness and width of the entire hoisting machine can be reduced.

  However, the technology related to a thin hoisting machine including a brake device of the type that brakes the outer peripheral surface of the brake drum described in Patent Document 1 or 2 or the like has a part of the electromagnetic brake device at two places on the left and right sides of the hoisting machine outer portion. The brake lever (brake arm) and brake pad (shoe) to be formed need to be arranged, and the width of the entire hoisting machine is increased by that amount, making it difficult to reduce the size of the thin hoisting machine.

  Further, the technology described in Patent Document 3 is to save the installation space on the left and right or top and bottom of the hoisting machine, and to realize the most important space saving in the thickness direction with a thin hoisting machine. Absent. In addition, this technology assembles the electromagnetic brake device independently and integrally with the fixed portion of the hoisting machine, and makes it easy to share the electromagnetic brake device in hoisting machines of different shapes and methods, thereby improving productivity. In particular, it is not a technology for downsizing a thin hoisting machine for machine-less elevators.

JP 2004-2038 A JP 2003-104666 A JP 2000-143131 A

Therefore, it should be solved in terms of further miniaturization of the thin hoist by devising the arrangement and application of the electromagnetic brake device to the hoist so as to exhibit the efficient output of the electromagnetic brake device. There are challenges.
An object of the present invention is to solve the above-described problems and to use an efficient output of an electromagnetic brake device, with respect to a thin hoisting machine applicable as a machine room-less elevator for braking an outer peripheral surface of a brake drum. An object of the present invention is to provide a thin hoisting machine that facilitates downsizing.

  In order to achieve the above object, a thin hoist according to the present invention includes a housing that supports the suspension load of an elevator, a main shaft that is cantilevered and supported by the housing, and a bearing at the other end of the main shaft. A sheave attached rotatably through the sheave, a brake drum that rotates integrally with the sheave and has a larger diameter than the sheave, and an electromagnetic brake that is fixed to the housing for braking the brake drum In the thin hoisting machine provided with a device, the electromagnetic brake device is installed outside the outer peripheral surface of the brake drum and at two locations on the upper and lower sides of the housing, The electromagnetic brake device is disposed between two traveling portions of a rope wound around the sheave, and at least one of the electromagnetic brake devices has a maximum thickness in the hoisting machine shaft direction excluding the electromagnetic brake device. The It is equal to or less than the maximum axial thickness of the entire hoisting machine, and the maximum dimension in the direction between the two traveling parts of the rope is smaller than the distance between the two traveling parts, and between the two traveling parts. It is characterized in that it is installed without interfering with both the traveling parts.

  According to this thin hoisting machine, the main shaft is fixedly supported on the casing that supports the suspension load of the elevator, and the sheave is rotatably attached to the other end of the main shaft via a bearing. A brake drum with a larger diameter than the car is integrated. Two electromagnetic brake devices are installed opposite to each other at the top and bottom of the housing, and at least one electromagnetic brake device is placed between the two traveling parts of the rope wrapped around the sheave. About the outer shape and dimensions of one electromagnetic brake device arranged between the parts, the thickness (axial thickness) is made smaller than the whole hoisting machine, and the width direction (between the two running parts of the rope) (Direction) is smaller than the distance between the traveling parts (substantially the same as the diameter of the sheave). The electromagnetic brake device has a thickness that can be accommodated in the thickness direction of the entire hoisting machine, and a width that can be accommodated without interfering with the traveling part between the two traveling parts of the rope wound around the sheave. In particular, the cross section has a shape close to a square and does not become elongated. Therefore, the electromagnetic brake device can exhibit high output efficiency while maintaining its output level, and can be configured compactly.

  In this thin hoist, at least one of the electromagnetic brake devices can be fixed to the casing via a fixing member. When the electromagnetic brake device is fixed to the housing via the fixing member, it is preferable to take into account the thickness (axial thickness) including the fixing member. Further, in the width direction (the direction between the two traveling portions of the rope), it is preferable that the fixing member be taken into consideration so as to avoid interference with the rope.

  The drive motor for a thin hoist according to the present invention can be rotated via a bearing on a casing that supports the suspension load of the elevator, a spindle that is cantilevered and supported by the casing, and a bearing on the other end of the spindle. A sheave attached to the sheave, a brake drum that rotates integrally with the sheave and has a larger diameter than the sheave, and an electromagnetic brake device that is fixed to the housing for braking the brake drum. The stator is wound in a concentrated manner around the casing, and a plurality of permanent magnets are disposed on the brake drum so as to face the stator. And a three-phase AC motor configured as a magnet motor having a rotor.

  According to the present invention, with respect to a thin hoisting machine that brakes the outer peripheral surface of the brake drum, the electromagnetic brake device has a thickness that fits in the thickness direction of the entire hoisting machine, and two traveling parts of a rope that is wound around the sheave It has a width that can be accommodated without interfering with the traveling portion in between, and has a cross section that is as close to a square as possible, so that it does not become elongated. Since the electromagnetic brake device has higher output efficiency as it is closer to a perfect cross-section, it can exhibit high output efficiency while maintaining its output level, and can be configured compactly, especially in hoisting The width of the machine can be further reduced.

FIG. 1 is a front view showing an embodiment of a thin hoist according to the present invention. FIG. 2 is a side view of the thin hoist shown in FIG. FIG. 3 is a sectional side view showing the thin hoisting machine shown in FIG. FIG. 4 is a side view showing another embodiment of the thin hoist according to the present invention. FIG. 5 is a front view of the thin hoist shown in FIG. FIG. 6 is a view showing a modification of the fixing member used in the thin hoist according to the present invention. FIG. 7 is a side view showing a comparative example of the hoisting machine. FIG. 8 is a front view of the comparative example shown in FIG. FIG. 9 is a cross-sectional side view showing, in partial cross section, another embodiment of the thin hoist according to the present invention. FIG. 10 is a schematic cross-sectional view of a hoistway of a machine room-less elevator.

  1 to 3 are views showing an embodiment of a thin hoist according to the present invention. FIG. 1 is a front view of the embodiment, FIG. 2 is a side view, and FIG. It is. As shown in FIGS. 1 to 3, the thin hoisting machine includes, as main components, a casing 1, a sheave 2, a main shaft 3, a bearing 4, a brake drum 5, a rotor 10, a stator 12, and an electromagnetic brake device. 6 is provided.

  The casing 1 is made of cast iron or the like, and the casing 1 has a bottomed cylindrical shape so that the brake drum 5 and the motor can be accommodated therein. A main shaft 3 is cantilevered and supported by a boss 1 a provided at the center of the housing 1. When the hoisting machine is installed in the elevator hoistway, the casing 1 is fixed to the hoisting machine fixing member attached in the hoistway through a vibration isolating rubber (not shown), and the elevator is suspended. Support the load.

  An annular protrusion 1b that is concentric with the boss 1a and is integrally formed with the casing 1 is provided inside the casing 1 and outside the boss 1a, and a motor stator is provided on the outer peripheral surface of the annular protrusion 1b. 12 is fixed. The stator 12 includes, as main components, a stator core 13 in which electromagnetic steel plates are laminated, a three-phase stator winding 14 and an insulating member (not shown). The stator winding 14 is a stator core. 13 is disposed in a slot provided in the slot 13. The stator winding 14 is a concentrated winding whose coil end height can be easily reduced for the purpose of thinning the hoisting machine. The annular protrusion 1b for fixing the stator 12 described above may be formed by a member different from the casing 1 and bolted to the casing 1.

  A sheave 2 is rotatably supported via a bearing 4 at the other end of the main shaft 3 that is fixedly supported by the boss 1 a of the housing 1. The brake drum 5 is disposed inside the housing 1 and outside the stator 12 so as to face the motor stator 12. The brake drum 5 is formed integrally with the sheave 2 with cast iron or the like. However, the brake drum 5 and the sheave 2 may be separate members and connected by bolts or the like.

  A plurality of permanent magnets 11 are attached to the inner peripheral surface of the brake drum 5 in the circumferential direction, and the brake drum 5 constitutes a surface magnet type rotor that also serves as a rotor yoke. Therefore, in this case, the brake drum 5 needs to be a magnetic material. The permanent magnet 11 has N poles and S poles alternately arranged in the circumferential direction, and the number of N poles and S poles is the same, and the number is half the number of motor poles. The rotor is arranged outside the stator 12 fixed to the housing 1 in a mode facing the radial direction with the air gap G interposed therebetween, and the motor constitutes a so-called outer rotor type motor. The rotational torque generated by this motor is transmitted to the sheave 2 via the brake drum 5 and drives the rope 20 wound around the sheave 2.

  One set of electromagnetic brake devices 6 is fixed to the upper and lower sides of the casing 1, that is, a total of two locations outside the outer peripheral surface of the brake drum 5. Each electromagnetic brake device 6 includes an electromagnet 7, a braking spring (not shown), a brake pad 8, and a brake pad support member 9 as main components. Therefore, although it is the same structure as a hoisting machine, two sets of mutually independent electromagnetic brake devices 6 and 6 are disposed on the upper side and the lower side of the housing 1. As a method for fixing the electromagnetic brake device 6 to the housing, the electromagnet 7 may be directly fixed to the housing 1 with a bolt or the like, or a fixing member 21 of the electromagnetic brake device as shown in FIGS. It may be provided. The electromagnetic brake device 6 can also be provided with three sets for every 120 ° around the housing 1 when a braking capacity is required.

  Holes or notches are provided at the top and bottom of the housing 1, and the brake pad 8 and the brake pad support member 9 are disposed inside the holes or notches. The center position where the electromagnetic brake devices 6 and 6 are installed, and the center position where the brake pad 8 and the brake drum 5 come into contact with each other to brake the brake drum 5 are on the center axis in the width direction of the hoisting machine. The brake pad 8 is configured such that the force pressing the brake drum 5 from the outside toward the center can be offset by the pressing force of each other. In the brake drum 5, the portion where the brake pad 8 is pressed is a position closer to the sheave 2 when viewed in the axial direction, so that the bending deformation generated in the brake drum 5 by the pressing force is small.

  Next, regarding the electromagnetic brake device 6, the axial thickness Lt of the electromagnetic brake device 6 is the same as or thinner than the thickness T of the hoisting machine excluding the electromagnetic brake device 6, and the width Lw of the electromagnetic brake device 6. (The width in the diametrical direction extending in the lateral direction of the sheave 2 and the brake drum 5 as shown in FIG. 1) from the distance D (substantially the diameter of the sheave 2) between the running portions 20 a and 20 b of the rope 20. Is also narrow. If it is the electromagnetic brake device 6 which satisfy | fills this condition, components structure and a shape will not ask | require. For example, in terms of the cross-sectional shape of the electromagnet 7, it may be circular or quadrangular. In addition, the electromagnetic brake device 6 said here means what remove | excluding the fixing member 21 of the electromagnetic brake device 6 as shown in FIG.

  When the thin hoisting machine is applied to a machine room-less elevator, the wrap angle of the rope 20 wound around the sheave 2 is generally about 180 °, and the rope 20 wound around the sheave 2 is In general, the vehicle runs substantially vertically upward or downward as viewed from the top. Therefore, a structure like the electromagnetic brake device 6 should not exist in the space through which the rope 20 passes.

  In this thin hoisting machine, the thickness Lt of the electromagnetic brake device 6 is limited to the same or thinner than the thickness T of the hoisting machine excluding the electromagnetic brake device 6. In the first place, thinning a thin hoist used in a machine room-less elevator is the most important issue. If the thickness Lt of the electromagnetic brake device 6 is thicker than the thickness T of the hoisting machine excluding the electromagnetic brake device 6, the thickness of the entire hoisting machine is determined by the thickness Lt of the electromagnetic brake device 6. End up. That is, if the thickness Lt of the electromagnetic brake device 6 is not at least the same as the thickness T of the hoisting machine excluding the electromagnetic brake device 6, it becomes a factor that hinders the thinning of the entire hoisting machine.

  Moreover, in this thin hoisting machine, the width Lw of the electromagnetic brake device 6 is made smaller than the distance D between the traveling parts of the ropes 20, 20, that is, substantially the diameter of the sheave 2. 2 and the space protruding in the axial direction from the housing 1 can also be used as an installation space for the electromagnetic brake device 6 (see FIG. 2 which is a side view and FIG. 3 which is a cross-sectional view thereof). The electromagnetic brake device 6 can be installed in a space sandwiched between both traveling portions 20a and 20b of the rope 20 wound around the car 2. At the same time as avoiding interference between the electromagnetic brake device 6 and the rope 20, the cross-sectional area of the electromagnet 7 is not sacrificed, so that the output of the electromagnetic brake device 6 can be ensured. Moreover, since the cross-sectional shape of the electromagnet 7 can be made close to a circle, the efficiency of the electromagnetic brake device 6 can be increased. Further, since the entire electromagnetic brake device 6 can be avoided from being elongated, the degree of freedom of the configuration and structure can be increased, and the productivity can be improved.

  In this way, the axial thickness Lt of the electromagnetic brake device 6 is made equal to or thinner than the thickness T of the hoisting machine excluding the electromagnetic brake device 6, and the width Lw of the electromagnetic brake device 6 is further set to the sheave. By making the diameter smaller than the diameter (substantially D) of 2, it becomes possible to avoid interference between the electromagnetic brake device 6 and the rope 20, and at the same time, an efficient cross-sectional shape is adopted as the electromagnetic brake device 6. can do. Specifically, as in this embodiment, an electromagnetic brake is installed in a space formed between the one traveling portion of the rope 20 and the other traveling portion of the rope 20 above the sheave 2 and the housing 1. It is optimal to arrange the device 6. In general, the cross-sectional shape of the electromagnet 7 is circular (perfect circle), and it is said that the efficiency is high and the manufacturability is also good. The efficiency of the electromagnet 7 decreases as the distance from the circular cross-sectional shape increases. Most of the electromagnet devices are circular.

  Furthermore, the output part of the electromagnetic brake device 6 for pressing the brake pad 8 against the brake drum 5 is generally arranged at the central portion of the axial thickness of the electromagnetic brake device 6. When the electromagnetic brake device 6 has a thickness T of the hoisting machine excluding the electromagnetic brake device 6, that is, a thickness equivalent to the total axial thickness of the housing 1 and the sheave 2, the output Since the portion presses the brake pad 8 against the region near the connecting portion of the brake drum 5 to the sheave 2 side, the bending stress acting on the sheave 2 integral with the brake drum 5 becomes excessive. As a result, the sheave 2 can be reduced in weight.

  Even when the width Lw of the electromagnetic brake device 6 is larger than the diameter (substantially D) of the sheave 2, as shown in FIGS. 7 and 8, the electromagnetic brake device 6 is disposed only on the upper portion of the housing 1. If 6 is not applied to the upper part of the sheave 2, interference between the electromagnetic brake device 6 and the rope 20 can be avoided. However, in this case, since the shape of the electromagnet 7 to be provided in the electromagnetic brake device 6 is elongated, the efficiency of the electromagnet 7 is deteriorated. Furthermore, since it is necessary to configure the electromagnetic brake device 6 in an elongated space, the thinness and width of the thin hoisting machine in which the configuration and structure of the electromagnetic brake device 6 are low and miniaturization is important are further reduced. It is disadvantageous and difficult. This corresponds to the case where the known technique described in Patent Document 3 is applied to a thin hoisting machine. In the case of this configuration, it is particularly difficult to make the hoisting machine thinner.

  In general, the ratio of the thickness of the sheave 2 and the casing 1 of the thin hoist is about 1: 1 to 1: 2, but the electromagnetic brake device is configured only within the upper space of the casing 1. When the electromagnetic brake device 6 is configured in the range of the upper space of both the sheave 2 and the housing 1 as in the present invention, that is, the entire thickness of the thin hoisting machine excluding the electromagnetic brake device 6 is used for electromagnetic Comparing with the case where the brake device 6 is configured, the thickness allowed for the electromagnetic brake device is about 1.5 to 2 times larger in the latter than the former (with the above-described thin hoisting sheave) Corresponding to the thickness ratio of the housing). As a result, the degree of structural freedom of the electromagnetic brake device 6 is increased, and at the same time, the efficiency of the electromagnet 7 is improved. Therefore, the electromagnetic brake device 6 can be easily reduced in size, and finally the entire thin hoisting machine It is possible to realize downsizing. In comparison with the device described in Patent Document 3, it is particularly advantageous with respect to thinning.

  When the fixing member 21 of the electromagnetic brake device as shown in FIGS. 4 and 5 is used, the width of the fixing member 21 may be larger than the diameter (substantially D) of the sheave 2. In this case, however, it is necessary to reduce the thickness of the fixing member 21 or to provide the fixing member 21 with a notch or a dent to avoid the rope 20 so that the fixing member 21 and the rope 20 do not interfere with each other. is there. FIG. 6 shows a modification of the fixing member in this case. Fig.6 (a) is a top view of the modification of a fixing member, and the same (b) is the front view. The fixing member 31 as a modified example includes a fixing main body 32 attached to the electromagnetic brake 6, fixing leg portions 33, 33 which are bent and extended integrally on both sides thereof and attached to the housing 1 with fixing bolts 35. It has. On one side of the fixing main body 32, notches (or recesses) 34 and 34 are provided so that the traveling parts 20 a and 20 b of the rope 20 can pass without interference.

  For the electromagnetic brake device 6 disposed on the upper side of the housing 1, the maximum thickness Lt in the axial direction of the hoisting machine including the fixing member 21 is the same as that of the entire hoisting machine excluding the electromagnetic brake device 6. It is the same as or less than the maximum thickness T in the axial direction (see FIG. 4). That is, the thickness Lt of the electromagnetic brake device 6 including the fixing member 21 can be set to a thickness utilizing the maximum axial thickness T of the entire hoisting machine excluding the electromagnetic brake device 6.

  Moreover, about the electromagnetic brake device 6 arrange | positioned above the housing | casing 1, in the part of the electromagnetic brake device 6 except the fixing member 21, between two traveling parts 20a and 20b of the rope 20 wound around the sheave 2 The maximum dimension Lw in the direction is smaller than the distance D between the traveling parts 20a and 20b. That is, the part of the electromagnetic brake device 6 excluding the fixing member 21 is substantially smaller than the diameter (substantially D) of the sheave 2 and is sandwiched between the two traveling portions 20a and 20b. It can be installed in a space.

  Furthermore, the maximum thickness Lf in the hoisting machine axial direction of the fixing member 21 that fixes the electromagnetic brake device 6 disposed on the upper side of the housing 1 to the housing 1 is equal to the axial thickness Tc of the housing 1 or It is said that it is less than that. That is, since the fixing member 21 needs to fix the electromagnetic brake device 6 to the housing 1 so as not to interfere with the two traveling portions 20a and 20b of the rope 20, it is within the thickness of the housing 1 in the axial direction. The thickness is set.

In the magnet rotor, the stator 12 is fixed to the casing 1, and the rotor 10 is fixed to the brake drum 5. The stator 12 and the rotor 10 are configured to face each other in the radial direction via the air gap G, and the diameter of the air gap G is larger than the diameter of the sheave 2.
Further, the electromagnetic brake device 6 can be a directly-actuated brake device that does not have an amplifying mechanism for the braking spring force and electromagnetic attractive force. In this case, the braking stroke and the operating gap of the electromagnet are the same as the braking gap between the brake pad 8 and the brake drum 5.

[Other Embodiment 1]
The thin hoist according to the present invention can be implemented even if the motor section is an inner rotor type. In this case, for example, as shown in FIG. 9, only the structure around the motor unit may be changed from the outer rotor to the inner rotor. In FIG. 9, the same elements as those shown in FIG.

DESCRIPTION OF SYMBOLS 1 Case 1a Boss 1b Ring part 2 Sheave 3 Main shaft 4 Bearing 5 Brake drum 6 Electromagnetic brake device 7 Electromagnet 8 Brake pad 9 Brake pad support member 10 Rotor core 11 Permanent magnet (rotor)
DESCRIPTION OF SYMBOLS 12 Stator 13 Stator iron core 14 Stator winding 15 Hoistway 16 Hoistway wall 17 Riding car 18 Thin hoisting machine 19 Counterweight 20 Rope 20a, 20b Traveling part 21 Fixing member 31 Fixing member 32 Fixing main body 33 Fixing Leg 34 Notch (recess)
35 Fixing bolt G Air gap Lt Thickness of the electromagnetic brake device in the axial direction T Thickness of the hoisting machine excluding the electromagnetic brake device Lw Width of the electromagnetic brake device D Distance between the two traveling parts of the rope Lf Hoisting machine axial direction of the fixing member Maximum thickness of Tc Thickness of the casing in the axial direction

Claims (15)

A housing that supports the suspension load of the elevator, a main shaft that is cantilevered and supported by the housing, a sheave that is rotatably attached to the other end of the main shaft via a bearing, and the sheave integrally In a thin hoist equipped with a brake drum having a larger diameter than the sheave and rotating, and an electromagnetic brake device fixed to the housing for braking the brake drum,
The electromagnetic brake device is disposed outside the outer peripheral surface of the brake drum and at two locations on the upper side and the lower side of the casing. One of the electromagnetic brake devices is wound around the sheave. Is placed between the two traveling parts of the rope,
At least one of the electromagnetic brake devices has a maximum thickness in the axial direction of the hoisting machine that is equal to or less than a maximum thickness in the axial direction of the entire hoisting machine excluding the electromagnetic brake device, and two of the ropes. A thin hoisting machine characterized in that the maximum dimension in the direction between two traveling parts is smaller than the distance between the two traveling parts, and is installed between the two traveling parts without interfering with both the traveling parts. The thin hoist according to claim 1,
A thin hoist according to claim 1, wherein at least one of the electromagnetic brake devices is fixed to the housing via a fixing member. The thin hoist according to claim 2,
The maximum thickness in the axial direction of the hoisting machine including the fixing member of at least one of the electromagnetic brake devices is equal to or less than the maximum thickness in the axial direction of the entire hoisting machine excluding the electromagnetic brake device. A thin hoisting machine characterized by that. The thin hoist according to claim 2 or 3,
In at least one of the electromagnetic brake devices, in the portion of the electromagnetic brake device excluding the fixing member, the maximum dimension in the direction between the two traveling portions of the rope wound around the sheave is greater than the distance between the two traveling portions. Is a small hoisting machine characterized by being installed in a space sandwiched between the two traveling parts. The thin hoist according to claim 4,
The thin hoist according to claim 1, wherein the fixing member for fixing at least one of the electromagnetic brake devices to the housing includes a notch or a recess for avoiding interference with the rope.   The thin hoist according to claim 4 or 5, wherein the maximum thickness in the axial direction of the hoisting machine of the fixing member that fixes at least one of the electromagnetic brake devices to the housing is set in the axial direction of the housing. A thin hoist characterized by being equal to or less than the thickness. In the thin hoist according to any one of claims 1 to 6,
The electromagnetic brake device includes an electromagnet that is fixed to the casing and outputs a force that presses a brake pad against the brake drum. The thin hoist according to claim 7,
The thin electromagnetic hoisting machine is characterized in that the two electromagnetic brake devices are arranged at opposing positions where the pressing force to the brake drum can be offset each other across the rotating shaft of the brake drum. The thin hoist according to claim 7,
When viewed in the axial direction of the hoisting machine, the center position where both the electromagnetic brake devices are installed and the center position where the brake drum is braked are both the axial center position of the hoisting machine. A thin hoisting machine. The thin hoist according to claim 7,
The two electromagnetic brake devices are directly actuated brake devices having no amplifying mechanism for braking spring force and electromagnetic attraction force, and the braking stroke and the operating gap of the electromagnet are the same as the braking gap between the brake pad and the brake drum. A thin hoisting machine characterized by being. The thin hoist according to claim 7,
A thin hoist according to claim 1, wherein a hole or a notch in which the brake pad and the brake pad support member are installed is formed in the housing corresponding to each electromagnetic brake device. The thin hoist according to claim 7,
As a magnet motor provided with a stator in which windings are concentrated on the housing and a rotor in which a plurality of permanent magnets are arranged opposite to the stator on the brake drum inside the housing. A thin hoisting machine having a built-in three-phase AC motor. The thin hoist according to claim 12,
The stator is a casing, the rotor is fixed to the brake drum, and the stator and the rotor are configured to face each other in the radial direction through an air gap, and the diameter of the air gap is the same as that of the sheave. A thin hoist characterized by being larger than the diameter. The thin hoist according to any one of claims 1 to 13,
A thin hoisting machine that is installed in an elevator hoistway as a thin hoisting machine for machine room-less elevators, and that the sheave has a larger diameter than the entire hoisting machine . A housing that supports the suspension load of the elevator, a main shaft that is cantilevered and supported by the housing, a sheave that is rotatably attached to the other end of the main shaft via a bearing, and the sheave integrally And is applied to a thin hoist equipped with a brake drum having a diameter larger than that of the sheave and an electromagnetic brake device fixed to the housing for braking the brake drum,
As a magnet motor having a stator in which windings are concentrated on the casing and a rotor in which a plurality of permanent magnets are disposed opposite to the stator on the brake drum. A drive motor for a thin hoisting machine, characterized in that a built-in three-phase AC motor is incorporated.

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