JP2004091215A - Elevator hoist - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator hoist that can be easily installed in a small space. <P>SOLUTION: A main spindle 17 is provided starting from the bottom face 4 of a base 2 taking the form of a bowl and being open on one side. A bowl-shaped body 19 is provided to fit into the base 2, with the bottom face of the bowl-shaped body disposed oppositely to the bottom face 4 of the base 2 and pivotally attached to the main spindle 17. A drive sheave 20 is formed on the outer peripheral surface of the bowl-shaped body at the bottom. A braking surface 191 is formed on the inner surface of the edge of an opening in the base. A stator winding 18 is provided on the open edge 3 of the base 2 and an armature 21 is provided on the open edge of the bowl-shaped body 16. A brake 22 having a braking piece 26 opposite to a braking surface 191 is positioned inside the bowl-shaped body 19. The drive pulley 20 is formed integral with the bowl-shaped body 19 where the armature 21 is provided to form a rotor. Also, the brake 22 is positioned inside the bowl-shaped body 19 to miniaturize the hoist. Restrictions on the installation of the hoist are eliminated while solving the problem of maintenance becoming difficult. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a traction-type elevator hoist in which a rotor of a motor provided in a frame and a drive sheave are integrally formed.

10 and 11 are views showing a conventional elevator hoist, FIG. 10 is a front view showing a state where the elevator hoist is mounted on a guide rail of the elevator, and FIG. 11 is a sectional view taken along line AA of FIG. . In the figure, reference numeral 1 denotes a guide rail of an elevator which is erected, and 2 denotes a base body having a bowl shape and opened on one side. The main shaft 5 is provided in an upright state. Reference numeral 6 denotes a stator winding provided inside the bottom surface 4 of the base 2.

Reference numeral 7 denotes a rotating body pivotally supported by the main shaft 5, and an armature 8 which forms a disk-shaped motor facing the stator winding 6 on a surface facing the inside of the bottom surface 4 of the base 2, and a surface facing the inside of the bottom surface 4. And a drive sheave 10 formed on the side of the opening edge 3 of the base 2 and having a smaller diameter than the brake disk 9 is provided. Reference numeral 11 denotes an electromagnetic brake which is provided on the outer peripheral edge of the base body 2 and presses the brake disk 9 to perform a braking operation. Reference numeral 12 denotes a main rope wound around the driving sheave 10, which is not shown. The basket and the counterweight are connected respectively.

The conventional elevator hoisting machine is configured as described above, is mounted on the back of the guide rail 1, and is disposed near the upper end of the hoistway (not shown). Then, the main rope 12 is wound around the drive sheave 10, and the main rope 12 is driven by the frictional force due to the rotation of the drive sheave 10, so that the car and the counterweight are moved up and down in opposite directions. (For example, see Patent Document 1).

Japanese Patent Publication No. Hei 8-511758

In the conventional elevator hoist described above, since the electromagnetic brake 11 is provided to protrude from the outer shape of the base 2, the outer dimensions of the hoist increase. In addition, since maintenance and inspection of the electromagnetic brake 11 and the like are required, a space for maintenance work is required, and a large space is required for the hoist, and the installation of the hoist is restricted or difficult. There was a problem that became.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an elevator hoist that can be easily installed in a small space.

In the elevator hoist according to the present invention, a base having a bowl-like shape and opening on one side, a main shaft provided in the base and arranged upright from the center of the bottom of the bowl-like shape of the base, A bowl-shaped body which is arranged in a fitted state, the bottom face of which is arranged facing the bottom face of the base body and the center of which is pivoted by the main shaft and rotates, and a drive sheave formed on the outer peripheral surface of the bowl-shaped body, A stator winding provided on the inner peripheral surface of the base body, and an armature provided on the outer peripheral surface of the bowl-shaped body and arranged to face the stator winding to constitute an electric motor with the stator winding, A brake provided in the bowl-shaped body and having a braking piece that is arranged to face a braking surface formed on the inner peripheral surface of the bowl-shaped body and that performs a braking operation;

In the elevator hoist according to the present invention, a support plate is provided at the opening edge of the base to form a space between the base and the base. Supported by

In addition, the elevator hoist according to the present invention is provided with an encoder that is arranged around the main shaft end of the support plate on the base side and detects rotation of the drive sheave.

Further, in the elevator hoist according to the present invention, the inspection holes are provided so as to penetrate the base body, be arranged opposite to the rim surface of the drive sheave, and are separated from each other in a direction along the peripheral surface of the rim of the drive sheave. A main rope detaching stopper is provided, which is fastened to one side at the edge of the inspection hole and has a small gap formed between the inspection rope and the main rope wound around the drive sheave and is opposed to the main rope. .

In addition, in the elevator hoist according to the present invention, there is provided a base having a leg portion formed integrally and provided with a suspension hole through which the main rope is inserted.

Further, in the elevator hoist according to the present invention, the elevator hoisting machine is provided on the inner surface of the base body, is disposed to face the rim surface of the driving sheave, and runs along the outer periphery of the driving sheave, and in a radial direction from the outer periphery of the driving sheave. Are provided with main rope guides arranged at a certain distance from each other.

In the elevator hoist according to the present invention, the drive sheave is provided on the side of the bowl-shaped body facing the base bottom surface, and the armature is provided on the bowl-shaped body opening edge side.

In the elevator hoist according to the present invention, the brake is mounted on the support plate and arranged between the brake and the base.

Further, in the elevator hoist according to the present invention, the support plate is provided with a rotating plate mounted with a brake and detachably fastened to the base, a stationary plate mounted on an opening edge of the base, and a rotary plate. The plate and the stationary plate are constituted by hinges pivotally connected to mutually opposing portions.

As described above, the present invention, as described above, has a base formed in a bowl shape and opened on one side, a main shaft provided in the base and arranged upright from the center of the bottom of the bowl shape of the base, and fitted in the base. A bowl-shaped body which is arranged in a state where the bottom face is arranged facing the bottom face of the base body and the center of which is pivoted by the main shaft and rotates; a drive sheave formed on the outer peripheral surface of the bowl-shaped body; An armature which is provided on the inner peripheral surface, and which is provided on the outer peripheral surface of the bowl-shaped body and which is arranged opposite to the stator winding and which is arranged to face the stator winding, forms an electric motor; And a brake having a braking piece that is disposed to face a braking surface formed on the inner peripheral surface of the bowl-shaped body and that performs a braking operation.

As a result, a drive sheave is formed integrally with the bowl-shaped body provided with the armature and the rotor, and a brake is provided for pressing a braking surface formed on the inner peripheral surface of the bowl-shaped body with a braking piece. Can be For this reason, the external dimensions of the hoist can be reduced, and maintenance and inspection work of the brake and the like can be performed by the space facing the opening of the bowl-shaped body. Therefore, the space for installing the hoist and the space for maintenance and inspection work of the hoist are small, and the hoist can be easily installed in a narrow place, and the installation is restricted or the installation becomes difficult. Has the effect of eliminating.

Further, as described above, the present invention provides a support plate which is attached to the opening edge of the base and forms a space between the base and the base, and both ends of the main shaft are supported by the bottom of the base and the support plate. It is.

Thus, the bowl-shaped body and the brake constituting the rotor of the drive sheave and the electric motor are arranged in the space formed by the base and the support plate. For this reason, there is an effect that the outer dimensions of the hoisting machine are reduced to reduce the size.

Further, as described above, the present invention is provided with the encoder disposed around the main shaft end of the support plate on the base side to detect the rotation of the drive sheave.

Further, since the encoder is disposed at the end of the main shaft in the space formed by the support plate and the base, the space between the support plate and the base can be effectively used, and the encoder does not protrude from the hoist. Can be miniaturized by reducing the external dimensions of the device. Accordingly, the space for installing the hoist and the space for maintenance and inspection work of the hoist are reduced, and the installation of the hoist is facilitated.

In addition, as described above, the present invention provides inspection holes that penetrate the base and are arranged to face the rim surface of the drive sheave and are separated from each other in a direction along the peripheral surface of the rim of the drive sheave. One side is fastened to the edge of the inspection hole, and the other side is provided with a main rope detaching stopper which is arranged opposite to the main rope wound around the driving sheave with a small gap formed therebetween. .

By installing the main rope detaching stopper, it is possible to prevent the occurrence of a problem in which the loosened main rope deviates from the rope groove of the drive sheave, thereby improving the operation reliability of the hoist. And has the effect of facilitating handling during maintenance.

Further, as described above, the present invention is provided with a base having a leg portion formed integrally and provided with a suspension hole through which a main rope is inserted.

Since the main rope is inserted into the suspension hole of the base leg, the main rope is protected without providing a separate protector at the entrance of the main rope with respect to the base. For this reason, there is an effect of preventing the occurrence of a problem that a foreign object comes into contact with and damages the main rope at the entrance and exit of the base body with a simple configuration.

Further, as described above, the present invention is provided on the inner surface of the base body, is disposed to face the rim surface of the drive sheave, and runs along the outer periphery of the drive sheave and at a fixed distance in the radial direction from the outer periphery of the drive sheave. It is provided with a main rope guide that is separated and arranged.

As a result, when the main rope is wound around the drive sheave, the main rope is inserted from one side between the main rope guide and the drive sheave. enter in. Then, the main rope can be pulled out from the other side between the main rope guide and the drive sheave. As a result, the main rope can be wound around the rope of the drive sheave without difficulty, and there is an effect of improving work efficiency such as installation and maintenance of the elevator.

Further, as described above, in the present invention, the drive sheave is provided on the side of the bowl-shaped body facing the base of the base, and the armature is provided on the side of the opening of the base of the bowl-shaped body.

(4) With this arrangement, the stator winding and the armature are arranged on the side of the opening edge of the base, so that the support plate can be removed and the motor portion can be easily inspected. Therefore, there is an effect of improving the maintenance work efficiency.

In addition, as described above, in the present invention, the brake is mounted on the support plate and disposed between the brake and the base.

Thereby, the brake together with the support plate can be removed from the base body, and the brake can be easily inspected, which has an effect of improving the maintenance work efficiency.

Further, as described above, the present invention provides a support plate including a rotary plate mounted with a brake and detachably fastened to a base, a stationary plate mounted on an opening edge of the base, a rotary plate, and a fixed plate. The plate is constituted by a hinge rotatably connected to a plate.

に よ っ て This allows maintenance and inspection work on the brakes and the like in a state where the rotating plate, which has been released from being fastened to the base, is rotated by the hinge and opened from the base. Therefore, there is an effect that maintenance work of the brake or the like can be easily performed, and work efficiency is improved.

Embodiment 1 FIG.
1 to 6 show an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along line BB of FIG. 1, and FIG. 3 is an encoder in the hoist of FIG. 2, FIG. 4 is a right side view of FIG. 2 showing a state where the base and the bowl-shaped body are removed, FIG. 5 is a perspective view of the base on the back side of FIG. 1, and FIG. 6 is a view of FIG. It is a perspective view of a main rope detachment stopper.

In the figure, reference numeral 2 denotes a bowl-shaped base member which is open on one side, and which penetrates the opening edge 3, the bowl-shaped bottom surface 4, the leg 13 formed on the lower side, and the leg 13 to communicate with the bowl-shaped portion. A main rope hanging hole 14 described later is provided. Reference numeral 15 denotes a support plate, which is arranged in a vertical direction and has both ends at the opening edge 3 of the base 2. Reference numeral 16 denotes a fastener made of a bolt inserted into the opening edge portion 3 and screwed into the support plate 15.

Reference numeral 17 denotes a main shaft, which is an erect state from the bottom surface 4 of the base 2, that is, both ends are supported by the center of the support plate 15 and the bottom surface 4 of the base 2 and are formed by the support plate 15 and the base 2. The motivation is located across the space where it is deployed. Reference numeral 18 denotes a stator winding provided on the inner peripheral surface of the base 2 on the side of the opening edge 3.

Reference numeral 19 denotes a bowl-shaped body, which is disposed in the base 2 in a fitted state, and whose bottom is disposed so as to face the bottom 4 of the base 2, and whose center is pivoted by the main shaft 17 by a bearing and rotates. Reference numeral 20 denotes a drive sheave formed on the outer peripheral surface on the bottom surface side of the bowl-shaped body 19, and reference numeral 21 denotes an armature, an outer peripheral surface having a diameter larger than the outer diameter of the drive sheave 20 on the opening edge side of the bowl-shaped body 19. And the stator winding 18 is arranged to face the stator winding 18 to form an electric motor.

Reference numeral 22 denotes a brake composed of an electromagnetic brake provided in the bowl-shaped body. One end is provided at a brake arm 24 pivotally supported by the support plate 15 by the support pin 23, and the other end is provided at the rotation end of the support plate 15 and the brake arm 24, respectively. A brake spring 25 connected to the brake arm 24, a brake shoe 26 formed of a brake shoe disposed near the support pin 23 of the brake arm 24 and facing a brake surface 191 formed on the inner peripheral surface on the opening edge side of the bowl 19; A screw rod inserted into the brake arm 24 is formed as a main member, and is provided on the holding member 28 for holding the braking piece 26 on the brake arm 24 via the spherical seat 27 and on the support plate 15. Is constituted by an electromagnet mechanism 30 connected in the middle of the longitudinal direction.

In the brake 22, the brake arm 24, the brake spring 25, the brake piece 26, the electromagnet mechanism 30, and the like are provided at symmetrical positions on both sides with respect to the main shaft 17.
Reference numeral 12 denotes a main rope wound around the drive sheave 20. Although not shown, a car and a counterweight are respectively connected to both ends. Reference numeral 31 denotes an encoder disposed on the end side of the main shaft 17, which is constituted by a detection body 32 mounted on the support plate 15 and an operation plate 33 connected to the bowl 19 and rotated together with the bowl 19.

Reference numeral 34 denotes an inspection hole penetrating through the base 2, which is disposed so as to face the rim surface of the drive sheave 20 and is spaced apart from each other in a direction along the rim peripheral surface of the drive sheave 20. Reference numeral 35 denotes a main rope stopper which is fitted into the inspection hole 34. A fastening portion 36 is formed on one side, and is fastened to an edge of the inspection hole 34 by a mounting screw 37, and an opposite surface 38 is formed on the other side. The main sheave 12 wound around the drive sheave 20 has a small gap and is arranged to face the main sheave 12.

In the elevator hoist constructed as described above, the hoist is attached to the fixed portion of the hoistway mainly via the leg portion 13, and the main rope 12 is inserted into the hanging hole 14 to drive the sheave. It is wound around 20. Then, the drive sheave 20 is rotated by an electric motor formed by the stator winding 18 and the armature 21, and the main rope 12 is driven by the frictional force, and although not shown, the car and the counterweight are moved in opposite directions. To go up and down.

1 to 6, the drive sheave 20 is formed integrally with the bowl-shaped body 19 provided with the armature 21 and the rotor, and the inner periphery of the bowl-shaped body 19 on the opening edge side. A brake 22 that presses a braking surface 191 formed on the surface with a braking piece 26 is provided. Further, a drive sheave 20 and a bowl-like body 19 constituting a rotor of an electric motor and a brake 22 are arranged in a space formed by the inside of the base 2 and the support plate 15. As a result, the outer dimensions of the hoist can be reduced, and the size can be reduced.

保守 Further, maintenance and inspection work of the brake 22 and the like can be performed from the space facing the opening of the bowl-shaped body 19. Therefore, a space for installing the hoist and a space for maintenance and inspection work of the hoist are small, and the hoist can be easily installed in a narrow space. Thereby, the problem that installation of a hoist is restricted and installation becomes difficult can be solved.

The stator winding 18 and the armature 21 are arranged on the opening edge 3 side of the base 2. Therefore, by removing the support plate 15, the location of the motor can be easily inspected, and the maintenance work efficiency can be improved.
Further, since the brake 22 is mounted on the support plate 15, the brake 22 together with the support plate 15 can be detached from the base 2, and the brake 22 can be easily inspected, thereby improving the maintenance work efficiency. be able to.

{Circle around (2)} The encoder 31 is arranged around the end of the main shaft 17 of the support plate 15 on the base 2 side. For this reason, the space between the support plate 15 and the base 2 can be effectively used, and the encoder 31 does not protrude from the hoist, and the outer dimensions of the hoist can be reduced and downsized. Therefore, the space for installing the hoist and the space for maintenance and inspection work of the hoist are small, and the installation of the hoist can be facilitated.

The condition of the main rope 12 wound around the drive sheave 20 can be inspected by the inspection hole 34 provided in the base 2. Further, the main rope detaching stopper 35 is attached to the inspection hole 34 to prevent a problem in which the loosened main rope 12 deviates from the rope groove of the drive sheave 20 during maintenance work or the like. be able to.

In addition, since the legs 13 are provided on the base 2, the hoist can be mounted on the fixed portion of the hoistway with a simple configuration, and simple operations such as mounting the hoist via anti-vibration rubber can be performed. Depending on the configuration, anti-vibration support can be provided. Furthermore, since the main rope 12 is inserted into the suspension hole 14 of the base 2 leg 13 and is wound around the drive sheave 20, the main rope 12 is provided without providing a separate protective body (not shown) at the entrance to the base 2. Can be protected. Therefore, it is possible to prevent the occurrence of a problem in which a foreign object comes into contact and is damaged at the entrance of the main rope 12 with a simple configuration.

When the elevator car moves up and down, the electromagnet mechanism 30 of the brake 22 is urged to hold the brake piece 26 at the retracted position against the pressing force of the brake spring 25, and the bowl 19, ie, the drive sheave 20 Is released. When the elevator stops, the electromagnet mechanism 30 is deenergized, and the brake piece 25 is pressed by the brake spring 25 against the braking surface 191 formed on the inner peripheral surface on the opening edge side of the bowl-shaped body 19, and the driving rope The car 20 is braked.

In this brake 22, as shown in FIG. 4, when the pressing force of the brake spring 25 is C and the pressing force of the braking piece 26 is D, the moment about the support pin 23 is C × L1 = D × L2. And D> C from the relationship of L1> L2.

That is, since the pressing force C of the brake spring 25 can be made smaller than the pressing force D of the braking piece 26, the size of the brake spring 25 can be reduced. Therefore, the brake 22 can be stored in the bowl 19 with good space efficiency.

Embodiment 2 FIG.
7 and 8 are views showing an example of another embodiment of the present invention. FIG. 7 is a front view, and FIG. 8 is a left side view of FIG. 7 showing a state where a support plate is rotated by a hinge. . Except for FIGS. 7 and 8, an elevator hoist is configured in the same manner as in FIGS. 1 to 6 described above. In the figure, the same reference numerals as those in FIGS.

Reference numeral 15 denotes a support plate, which is arranged corresponding to the upper portion of the base 2 and forms most of the support plate 15, and is provided with a brake 22 and is removably fastened to the opening edge 3 of the base 2. The plate 151, the lower edge of the support plate 15 corresponding to the lower part of the base 2, is formed on the stationary plate 152 mounted on the opening edge 3 of the base 2, and the opposing portions of both the rotating plate 151 and the stationary plate 152. It is provided with a hinge 153 provided and rotatably connecting the two.

Also in the elevator hoisting machine configured as described above, the drive sheave 20 is formed integrally with the bowl-shaped body 19 provided with the armature 21 to form the rotor, and the opening edge of the bowl-shaped body 19 is formed. A brake 22 is provided, which presses a braking surface 191 formed on the inner peripheral surface on the side by a braking piece 26. Therefore, although detailed description is omitted, the same operation as the operation in the embodiment in FIGS. 1 to 6 can be obtained in the embodiment in FIGS. 7 and 8.

In the embodiments of FIGS. 7 and 8, the turning plate 151 on which the brake 22 is mounted and which forms the upper portion of the support plate 15 is pivotally connected to the stationary plate 152 by the hinge 153. Then, as shown in FIG. 8, the maintenance and inspection work of the brake 22 and the like is performed in a state where the rotation plate 151, which has been released from being fastened to the base 2, is rotated by the hinge 153 to open the brake 22. . Therefore, maintenance work of the brake 22 and the like can be easily performed, and work efficiency can be improved.

Embodiment 3 FIG.
FIG. 9 is also a view showing an example of another embodiment of the present invention. FIG. 9 is a view showing a state in which the support plate and the brake are removed from FIG. FIG. Except for FIG. 9, an elevator hoist is configured in the same manner as in FIGS. 1 to 6 described above. In the drawings, the same reference numerals as those in FIGS. 1 to 6 denote corresponding parts, and reference numeral 39 denotes a main rope guide, which is provided on the inner surface of the base 2 and is arranged so as to face the rim surface of the drive sheave 20. Along the outer circumference of the drive sheave 20 and at a certain distance from the outer circumference in the radial direction of the drive sheave 20, they are arranged between the inspection holes 34.

Also in the elevator hoisting machine configured as described above, the drive sheave 20 is formed integrally with the bowl-shaped body 19 provided with the armature 21 to form the rotor, and the opening edge of the bowl-shaped body 19 is formed. A brake 22 is provided, which presses a braking surface 191 formed on the inner peripheral surface on the side by a braking piece 26. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 6 can be obtained in the embodiment of FIG.

In addition, in the embodiment of FIG. 9, a main rope guide 39 is provided on the inner surface of the base 2 so as to face the rim surface of the drive sheave 20. For this reason, when the main rope 12 is wound around the drive sheave 20, the main rope 12 is inserted into the suspension hole 14 of the one leg 13 of the base 2, and the tip thereof is inserted through the inspection hole 34 into the main rope guide 39. Guide to the surface. In this state, when the main rope 12 is pushed in, it is guided by the main rope guide 39 and enters the inside.

Next, the main rope 12 is guided again to the next main rope guide 39 at the next inspection hole 34. By repeating such operations, the tip of the main rope 12 can be pulled out from the suspension hole 14 of the other leg 13 of the base 2. Thus, the main rope 12 can be wound around the rope of the drive sheave 20 without difficulty, and the efficiency of installation and maintenance of the elevator can be improved.

FIG. 1 is a front view showing a first embodiment of the present invention. FIG. 2 is a sectional view taken along line BB of FIG. 1. FIG. 3 is a diagram corresponding to FIG. 2 showing a configuration of an encoder in the hoist of FIG. 1. The right side view of FIG. 2 which shows the state which removed the base body and the bowl-shaped body. FIG. 2 is a perspective view of a base on the back side of FIG. 1. FIG. 4 is a perspective view of the main rope stopper of FIG. 3. The front view which shows Embodiment 2 of this invention. FIG. 9 is a left side view of FIG. 8 showing a state where the support plate is rotated by a hinge. FIG. 5 is a view showing the third embodiment of the present invention, and is a view corresponding to FIG. 1 showing a state in which the support plate and the brake are removed in FIG. FIG. 7 is a view showing a conventional elevator hoisting machine, and is a front view showing a state where the elevator hoisting machine is mounted on a guide rail of the elevator. The sectional view on the AA line of FIG.

Explanation of reference numerals

2 base, 3 opening edge, 4 bottom, 13 leg, 14 hanging hole, 15 support plate, 151 rotating plate, 152 stationary plate, 153 hinge, 17 spindle, 18 stator winding, 19 bowl shape, 191 braking surface, 20 drive sheave, 21 armature, 22 brake, 26 braking piece, 31 encoder, 34 inspection hole, 35 main rope detachment stopper, 39 main rope guide.

Claims (9)

A base body having a bowl shape and opened on one side;
A main shaft provided in the base and arranged in an upright state from the center of the bottom of the bowl shape;
A bowl-shaped body disposed in the fitting state in the base body, the bottom surface of which is arranged facing the bottom surface of the base body, and the center of which is rotatably supported by the main shaft;
A drive sheave formed on the outer periphery of the bowl-shaped body;
A stator winding provided on the inner peripheral surface of the base,
An armature that is provided on the outer peripheral surface of the bowl-shaped body and that is arranged to face the stator winding and that constitutes an electric motor with the stator winding;
An elevator hoisting machine, comprising: a brake provided in the bowl-shaped body and having a braking piece that is arranged to face a braking surface formed on an inner peripheral surface of the bowl-shaped body and that performs a braking operation. A support plate attached to the opening edge of the base and forming a space between the base and the base;
The elevator hoist according to claim 1, wherein both ends of the main shaft are supported by a bottom portion of the base and a support plate. 2. The elevator hoist according to claim 1, further comprising an encoder disposed around a main shaft end of the support plate on the base side to detect rotation of the drive sheave. Inspection holes that penetrate the base and are arranged opposite to the rim surface of the drive sheave and are separated from each other in a direction along the peripheral surface of the rim,
One side is fastened to the edge of the inspection hole, and the other side is provided with a main rope detaching stopper which is disposed opposite to the main rope wound around the drive sheave with a small gap formed therebetween. The hoisting machine for an elevator according to claim 1, wherein: (4) The elevator hoist according to (1), wherein the base has a leg portion formed integrally and provided with a suspension hole through which the main rope is inserted. A main rope that is provided on the inner surface of the base, is disposed to face the rim surface of the drive sheave, and is arranged along the outer periphery of the drive sheave and at a certain distance from the outer periphery in the radial direction of the drive sheave. The elevator hoist according to claim 1, further comprising a guide. A drive sheave is provided on the side of the bowl-shaped body facing the base bottom surface,
3. The elevator hoist according to claim 2, wherein an armature is provided on an opening edge side of the bowl-shaped body with the base. 8. The elevator hoist according to claim 7, wherein the brake is mounted on the support plate and disposed between the brake and the base. The supporting plate is provided with a rotating plate to which a brake is mounted and detachably fastened to the base, a stationary plate attached to an opening edge of the base, and the rotating plate and the stationary plate rotatably pivoted. The elevator hoist according to claim 8, wherein the elevator hoist is constituted by a hinge.

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