JPH09263367A - Elevator winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a maintenance work of a detecting part detecting the magnetic pole position, the rotating speed, and the rotating direction of a magnetic field in an elevator winding machine in which a driving sheave wrapped with the main cable of an elevator is constituted on the outer circumference, and a rotor as the important part of a synchronous motor forming an outer rotor motor is mounted. SOLUTION: A rack 28 made of flexible material, curved, and rotated together with a driving sheave 16 is provided on the circumference of a rotor 27 forming the important part of a synchronous motor having an outer rotor motor, and constituting the driving sheave 126 wrapped with the main cable 18 of an elevator on the outer circumference. An absolute value encoder 29 is driven by a gear 30 meshing with the rack 28, so as to detect the magnetic pole position, the rotating speed, and the rotating direction of a magnetic field. Hereby, the absolute value encoder 29 can be exchanged only by detaching the absolute value encoder 29 and the gear 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator hoisting machine having a drive sheave around which main ropes of an elevator are wound, and a rotor forming a main part of a synchronous motor forming an outer rotor motor. Regarding

[0002]

2. Description of the Related Art FIG. 9 and FIG.
It is a figure which shows the conventional elevator hoisting machine shown by 17957 gazette, FIG. 9 is a perspective view which shows notionally an elevator apparatus, FIG. 10 is an expanded longitudinal cross-sectional view of the elevator hoisting machine of FIG. In the figure, 1 is a hoistway, 2 is a car that is guided by a car guide rail 3 that is erected on the hoistway 1, and moves up and down a predetermined route. 4 is a counterweight guide rail 5 that is erected on the hoistway 1. It is a counterweight that is guided and moves up and down a predetermined route.

A braking device 6 is provided on the counterweight 4 to clamp the counterweight guide rail 5 when necessary, 7 is a support beam provided on the top of the hoistway 1, and 8 is an outer rotor provided on the top of the hoistway 1. In a hoisting machine composed of a motor, a shaft 9 supported at both ends by a support beam 7, an armature core 11 wound around an armature winding 10 and fixed to the shaft 9, and a shaft 9 pivotally supported by a driving rope. The rotor 12 that constitutes the vehicle is a main part.

The rotor 12 has a field iron core 13,
A field permanent magnet 14, a drive sheave 16 having a rope groove 15 on the outer circumference, and a bearing 17 between the shaft 9 and the drive sheave 16 are provided. 18
Is a main rope of an elevator which is wound around the rope groove 15 and has one end connected to the car 3 and the other end connected to the counterweight 4. A braking device 19 is provided on the rotor 12 to stop the rotor 12.

Reference numeral 20 denotes an absolute value encoder, which has a ring shape and is arranged so as to surround the protruding flange portion of the rotor 12,
A bearing 21 is pivotally supported on a protruding flange portion of the rotor 12 and is mounted on an encoder holder 22 fixed to the shaft 9 via a fitting 23.

The conventional elevator hoisting machine is constructed as described above, and the magnetic pole position of the field permanent magnet 14 is detected by the absolute value encoder 20 to control the phase of the current flowing through the armature winding 10. Further, in order to control the ascending / descending speed and the ascending / descending direction of the car 2, the rotation speed and the rotation direction of the drive sheave 16 are detected by the absolute value encoder 20.

[0007]

In the conventional elevator hoisting machine as described above, when the absolute value encoder 20 is abnormal and is replaced, the shaft 9 is replaced by the ring-shaped absolute value encoder 20. It is necessary to move the beam 7 upward to extract it, which is a complicated work. Moreover, when the elevator hoisting machine is installed at the top of the hoistway 1, there is a problem that temporary work of the work scaffold is required and the work is troublesome.

The absolute value encoder 20 is ring-shaped and is provided so as to surround the protruding flange-shaped portion of the rotor 12. For this reason, an inexpensive absolute value encoder used in a general electric motor having a large inner diameter and a shaft rotation cannot be used, so that the absolute value encoder 20 becomes a special order product and becomes expensive.

The present invention has been made to solve the above problems, and provides an elevator hoisting machine capable of easily performing maintenance work of a detection unit for detecting a magnetic pole position, a rotation speed, a rotation direction, etc. of a field. The purpose is to get.

[0010]

In the elevator hoisting machine according to the present invention, a rotary drive sheave in which the main rope of the elevator is wound around the outer periphery without forming the main part of the synchronous motor forming the outer rotor motor is provided. A child, a rack that is provided around the rotor and rotates together with the drive sheave, and a gear that drives an encoder that meshes with the rack and detects a rotation speed and a rotation direction are provided.

Further, in the elevator hoisting machine according to the present invention, a rotor forming a drive sheave around which a main rope of the elevator is wound and which does not form a main part of a synchronous motor forming an outer rotor motor, A rack provided around the rotor and rotating together with the drive sheave, and a gear that drives an absolute value encoder that detects the magnetic pole position, rotation speed and rotation direction of the field that meshes with the rack are provided.

Further, in the elevator hoisting machine according to the present invention, there is provided a rack which is made of a flexible material having a belt shape and is curved and arranged at an edge portion in the width direction of the drive sheave and mounted on the outer periphery. .

Further, in the elevator hoisting machine according to the present invention, the amount of change in position output from the absolute value encoder when the rotor rotates by one cycle of the magnetic field is 2 ⁿ (where n is a digital value). Positive number).

Further, in the elevator hoisting machine according to the present invention, there is provided a rack which is composed of a plurality of curved pieces and which is mounted on the drive sheave with a gap formed between the opposed ends of the curved pieces.

Further, in the elevator hoisting machine according to the present invention, when the gears are opposed to the opposite ends of the curved pieces constituting the rack, they are provided in the middle of the length of the curved pieces to assist the gears. An auxiliary gear is provided to drive either the encoder or the auxiliary absolute encoder.

Further, in the elevator hoisting machine according to the present invention, the gear arranged at a position lower than the rotation center of the drive sheave and the gear arranged on the fixed portion so as to surround the outside of the rack. A cover equipped except for the location is provided.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. 1 to 3 are views showing an example of an embodiment of the present invention, FIG. 1 is a front view showing a part of it in a longitudinal section, FIG. 2 is an exploded view of the rack of FIG. 1, and FIG. It is a left side view. An elevator apparatus is configured in the same manner as in FIGS. 9 and 10 described above except FIGS. 1 to 3. In the figure,
Reference numeral 24 is a pedestal provided on the fixed portion of the hoistway 1.

Reference numeral 8 is a hoisting machine composed of an outer rotor motor provided at the top of the hoistway 1, and a shaft 9 having both ends supported by a pedestal 24, and an armature fixed to a armature fixing member 25 through mounting brackets 26. An armature iron core 11 around which a winding 10 is wound and a rotor 27 which is pivotally supported by a shaft 9 and constitutes a drive sheave are mainly constituted.

The rotor 27 has a field magnet permanent magnet 14 provided in a recess recessed from the side surface and arranged to face the armature core 11, and a drive sheave having a rope groove 15 on the outer circumference. 16 is formed, and a bearing 17 is provided between the shaft 16 and the shaft 9. Reference numeral 18 is a main rope of an elevator which is wound around the rope groove 15 and has one end connected to the car 3 and the other end connected to the counterweight 4.

Reference numeral 28 denotes a rack, which is formed of a strip-shaped body made of a flexible metal such as a soft metal such as aluminum or a synthetic resin material, is provided at an edge portion in the width direction of the rotor 27, and is curved and arranged along the outer periphery. And is attached to the outer periphery of the drive sheave 16 with an adhesive. The rack 28 may be attached by using bolts or the like when using a fixture. 29 is an absolute encoder attached to the armature fixing member 25,
Reference numeral 0 denotes a gear that meshes with the rack 28, and is fixed to the operating shaft of the absolute value encoder 29.

In the elevator hoisting machine constructed as described above, the magnetic pole position of the field permanent magnet 14 is detected by the absolute value encoder 29 to control the phase of the current flowing through the armature winding 10. Further, in order to control the ascending / descending speed and the ascending / descending direction of the car 2, the absolute value encoder 29 detects the rotating speed and the rotating direction of the drive sheave 16.

In this elevator hoisting machine, when the absolute value encoder 29 is abnormal and is to be replaced, it is sufficient to simply remove the absolute value encoder 29 and the gear 30. Therefore, the work can be simplified and the maintenance cost can be reduced. Further, as the absolute value encoder 29, a commercially available product in a form used for a general electric motor whose output shaft rotates can be used as it is. Therefore, manufacturing costs can be reduced.

It should be noted that it is conceivable to directly process the gears on the outer periphery of the drive sheave 16 in order to obtain the same structure as that of the embodiment shown in FIGS. However, since the outer diameter of the drive sheave 16 is large, the processing cost will increase. On the contrary,
In the embodiment shown in FIGS. 1 to 3, a rack 28 made of a flexible material having a strip shape is mounted in a wound state. Therefore, it is possible to apply a commercially available off-the-shelf rack and reduce the manufacturing cost.

As a means for detecting the magnetic pole position, rotation speed and rotation direction using a general absolute value encoder, a roller is attached to the shaft of the absolute value encoder. Then, press this roller against the outer circumference of the drive sheave 16,
A configuration that drives an absolute encoder is conceivable. However, in the case of such a configuration, it is necessary to take measures against slipping and roller wear. With respect to this point, in the embodiment shown in FIGS. 1 to 3, since the transmission mechanism including the rack 28 and the gear 30 is provided, it is not necessary to take measures against a problem such as slip.

Further, even if the absolute value encoder in the embodiment of FIGS. 1 to 3 is composed of an encoder for detecting the rotation speed and the rotation direction, the same operation as that of the embodiment of FIGS. 1 to 3 is performed. Obtainable.

Embodiment 2 FIG. FIG. 4 is a view showing an example of another embodiment of the present invention, which is a sectional view taken along the line AA in FIG. 1 and shows only a 90 ° portion of the entire circumference of the drive sheave. In the figure, the same symbols as those in FIGS. 1 to 3 described above indicate corresponding parts.

Also in the embodiment of FIG. 4, the above-mentioned FIG.
Since a transmission mechanism including the rack 28 and the gear 30 similar to that shown in FIG. 3 is provided, only the absolute value encoder 29 and the gear 30 need to be removed when the absolute value encoder 29 has a malfunction and needs to be replaced. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 3 can be obtained also in the embodiment of FIG.

In the embodiment shown in FIG. 4, the starting point P1 for one cycle, which is formed by the pair of magnets N1 and S1 of the field permanent magnet 14, is the rotation center C of the drive sheave 16 and the gear. The output change of the absolute value encoder 29 is exactly 2 when it is rotated in the direction of arrow B shown in FIG. 4 from the time when it comes to the line connecting the axis center of 30 to the time when the starting point P2 of the next magnetic field comes to this line. The rotation of the absolute value encoder 29 is set so that ⁿ (n = a positive number).

Then, a concrete absolute value encoder 29
As an example of the output value of, the case where the resolution for one round is 10 bits is shown in FIG. In this example, the change of the lower 8 bits becomes the change of one period of the magnetic field, and the position of the magnetic pole can be known from the change. In this way, the rotation of the absolute value encoder 29 is adjusted in consideration of the number of teeth and the pitch of the rack 28 and the gear 30 so as to match the rotation of the magnetic field. When such adjustment is not made, the absolute value encoder 29
It becomes necessary to convert the magnetic pole position from the output value of, and a control circuit or software for that is installed.

Embodiment 3 FIG. 5 is also a view showing an example of another embodiment of the present invention, and is a view corresponding to the cross-section taken along the line AA of FIG. 1 described above. In the figure, the same symbols as those in FIGS. 1 to 3 described above indicate corresponding parts. Reference numeral 28 denotes a rack, which is made of a flexible material in the form of four strips, is curved, is arranged at the widthwise edge of the rotor 27, and is mounted along the outer periphery. The gap D shown in FIG.

Also in the embodiment of FIG. 5, the above-mentioned FIG.
Since a transmission mechanism including the rack 28 and the gear 30 similar to that shown in FIG. 3 is provided, only the absolute value encoder 29 and the gear 30 need to be removed when the absolute value encoder 29 has a malfunction and needs to be replaced. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 3 can be obtained in the embodiment of FIG.

In the embodiment of FIG. 5, the expansion of the rack 28 due to thermal expansion is accommodated by the gap D between the facing portions of the four strips of the rack 28, and the error due to the manufacturing precision of the rack 28 is reduced. Be absorbed. As a result, normal transmission operation by the gear 30 and the rack 28 is obtained.
When the gap D is too large, meshing is hindered when the gear 30 passes through the gap D, so the gap D needs to be within twice the backlash.

Embodiment 4 FIG. FIG. 6 is also a view showing an example of another embodiment of the present invention, and is a view corresponding to the cross-section taken along the line AA of FIG. 1 described above. In the figure, the same symbols as those in FIGS. 1 to 3 described above indicate corresponding parts. Reference numeral 28 denotes a rack, which is made of a flexible material in the form of four strips, is curved, is arranged at the widthwise edge of the rotor 27, and is provided along the outer periphery. The gap D shown in FIG.

Reference numeral 301 denotes an auxiliary gear which is provided away from the gear 30 in the direction along the outer periphery of the drive sheave 16, and when the gear 30 corresponds to a position corresponding to the gap D between the four strips of the rack 28. And is arranged at an intermediate position of any of the four strips. Although not shown, the auxiliary gear 301 is equipped with an auxiliary absolute value encoder.

Also in the embodiment of FIG. 6, the above-mentioned FIG.
Since a transmission mechanism including a rack 28 and a gear 30 similar to that shown in FIG. 3 is provided, the absolute value encoder 29 and the gear 3 can be replaced when the absolute value encoder 29 has a malfunction and is to be replaced.
0, the work of removing the auxiliary absolute value encoder and the auxiliary gear 301 is sufficient. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 3 can be obtained in the embodiment of FIG.

In the embodiment of FIG. 6, when the gear 30 and the auxiliary gear 301 pass through the gap D between the four strips of the rack 28, the rotation of the corresponding absolute value encoder is disturbed. Then, an abnormality may occur in the speed signal obtained from the output due to the disturbed rotation.

For such a problem, instead of the speed signal of the absolute encoder corresponding to the gear passing through the gap C between the four strips of the rack 28, the middle of the four strips of the rack 28 is replaced. The velocity signal of the absolute encoder corresponding to the gear in position is used. As a result, a normal speed signal of the absolute value encoder can be obtained, and the elevator hoisting machine can be controlled with high reliability.

Embodiment 5. 7 and 8 are also diagrams showing an example of another embodiment of the present invention, in which FIG.
FIG. 8 is a view corresponding to a cross section taken along line EE of FIG. 7. In addition,
An elevator hoisting machine is configured in the same manner as the above-described embodiment of FIGS. 1 to 3 except for FIGS. 7 and 8. In the figure, the same reference numerals as those in FIG.

Reference numeral 30 designates a gear arranged below the center of rotation of the drive sheave 16, and an absolute value encoder 29 is provided correspondingly. Reference numeral 31 denotes a cover which is provided on the armature fixing member 25 and surrounds the outside of the rack 28, and is provided except for the gears 30.

In the embodiment of FIGS. 7 and 8 as well, since a transmission mechanism including the rack 28 and the gear 30 similar to those in FIGS. 1 to 3 is provided, the absolute value encoder 29 is replaced when an abnormality occurs. In case of absolute value encoder 29
All that is required is to remove the gear 30 and the gear 30. Therefore,
Although detailed description is omitted, the same effects as those of the embodiments of FIGS. 1 to 3 can be obtained in the embodiments of FIGS. 7 and 8.

Further, in the embodiment shown in FIGS. 7 and 8, since the cover 31 is provided, it is possible to prevent dust from adhering to the rack 28 and foreign matter from being caught between the rack 28 and the gear 30. can do. For this reason, it is possible to prevent problems caused by entrapment of dust and foreign matter, obtain a normal speed signal of the absolute value encoder, and control the elevator hoisting machine with high reliability.

[0042]

As described above, according to the present invention, a rotor forming a drive sheave around which a main rope of an elevator is wound and which forms a main part of a synchronous motor which forms an outer rotor motor, and which can be formed in a strip shape. A rack which is made of a flexible material and is curved and is provided around the rotor to rotate together with a drive sheave, and a gear which drives an encoder that meshes with the rack and detects a rotation speed and a rotation direction are provided. .

As a result, when the encoder is abnormal and is to be replaced, it is sufficient to simply remove the encoder and the gear. Therefore, the replacement work can be simplified and the maintenance cost can be reduced. Further, as the encoder, a commercially available product in a form used for a general electric motor having an output shaft that rotates can be used as it is, so that there is an effect of reducing the manufacturing cost.

Further, as described above, the present invention forms a belt with a rotor forming a drive sheave around which the main ropes of an elevator are wound around the outer periphery of the synchronous motor forming the outer rotor motor. Drives a rack made of a flexible material, which is bent around the rotor and rotates with the drive sheave, and an absolute value encoder which meshes with the rack and detects the magnetic pole position of the field, the rotation speed and the rotation direction. It is provided with a gear.

As a result, when an abnormality occurs in the absolute value encoder and it is replaced, it is sufficient to simply remove the absolute value encoder and the gear. Therefore, the replacement work can be simplified and the maintenance cost can be reduced.
Further, since the absolute value encoder can be used as it is as a commercially available product used for a general electric motor whose output shaft rotates, it has an effect of reducing the manufacturing cost.

Further, as described above, the present invention is provided with the rack which is made of a flexible material in the shape of a belt and is curved and arranged at the edge portion in the width direction of the drive sheave and mounted on the outer periphery. .

As a result, a rack can be formed on the drive sheave by simple processing, and it is possible to use a commercially available off-the-shelf rack as it is, which has an effect of reducing the manufacturing cost.

Further, according to the present invention, as described above, the change amount of the position output from the absolute value encoder when the rotor rotates for one cycle of the magnetic field is 2 ^{n in} digital value.
(N is a positive number).

This eliminates the need to convert the magnetic pole position from the output value of the absolute value encoder, and it becomes unnecessary to equip the control circuit or software. Therefore, there is an effect that the elevator hoisting machine can be normally controlled at a low cost with a simple device configuration.

Further, as described above, the present invention is provided with the rack which is composed of a plurality of curved pieces and which is mounted on the drive sheave so as to be arranged with a gap between the opposed ends of the curved pieces. is there.

As a result, the expansion of the rack due to thermal expansion is accommodated in the gap between the opposite ends of the curved pieces, and the error due to the rack manufacturing accuracy is absorbed. Therefore, it is possible to obtain the normal transmission operation of the gear and the rack and to normalize the control of the elevator hoisting machine.

As described above, according to the present invention, when the gears face each other at the positions facing the opposite ends of the curved pieces constituting the rack, the gear is provided in the middle of the length of the curved pieces so that the auxiliary encoder and the auxiliary are provided. It is provided with an auxiliary gear that drives either an absolute encoder.

As a result, when one of the gear and the auxiliary gear faces the opposing ends of the curved pieces constituting the rack, the other faces the longitudinal middle of the curved piece. Therefore, even if the rotation of the encoder or the like is disturbed when one of the above two passes through the opposite ends of the curved pieces, a normal speed signal of the encoder or the like can be obtained by the other of the two.
Therefore, there is an effect that the elevator hoist can be normally controlled.

Further, as described above, the present invention includes a gear arranged below the rotation center of the drive sheave,
And a cover which is provided on the fixed portion and is arranged so as to surround the outside of the rack and which is equipped except for the gear portion.

Thus, the cover can prevent dust from adhering to the rack and foreign matter from being trapped between the rack and the gear. Therefore, it is possible to prevent problems caused by the entrapment of dust and foreign matter, obtain a normal speed signal of an absolute encoder, etc., and obtain an effect of controlling the elevator hoisting machine with high reliability.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention and is a front view showing a part in a longitudinal section.

FIG. 2 is an exploded view of the rack shown in FIG.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a view showing the second embodiment of the present invention and is a cross-sectional view taken along the line AA in FIG. 1 described above and showing only a 90 ° portion of the entire circumference of the drive sheave.

5 is a view showing the third embodiment of the present invention and is a view corresponding to the cross-section taken along the line AA of FIG. 1 described above. FIG.

FIG. 6 is a view showing a fourth embodiment of the present invention, and is a view corresponding to a cross-section taken along line AA of FIG. 1 described above.

FIG. 7 is a view showing a fifth embodiment of the present invention, and is a view corresponding to FIG. 1 described above.

8 is a view corresponding to a cross section taken along line EE of FIG. 7.

FIG. 9 is a view showing a conventional elevator hoisting machine and is a perspective view conceptually showing an elevator apparatus.

FIG. 10 is an enlarged vertical sectional view of the elevator hoisting machine of FIG. 9.

[Explanation of symbols]

16 drive sheave, 18 main rope, 27 rotor, 28 rack, 29 absolute encoder (encoder), 3
0 gear, 301 auxiliary gear, 31 cover.

Claims (7)

[Claims] 1. A rotor which constitutes a drive sheave around which a main rope of an elevator is wound and which constitutes a main part of a synchronous motor which forms an outer rotor motor, and a drive sheave provided around the rotor. An elevator hoisting machine equipped with a rack that rotates together with the rack, and a gear that drives an encoder that meshes with the rack and detects the rotation speed and the rotation direction. 2. A rotor which constitutes a drive sheave around which a main rope of an elevator is wound, and which constitutes a main part of a synchronous motor which forms an outer rotor motor, and a drive sheave provided around the rotor. An elevator hoisting machine equipped with a rack that rotates together with it, and a gear that drives an absolute value encoder that detects the magnetic pole position of the field that meshes with the rack, the rotation speed, and the rotation direction. 3. A rack which is made of a flexible material in the form of a strip and which is curved and arranged at an edge portion in the width direction of the drive sheave and mounted on the outer periphery of the drive sheave. The elevator hoist according to any one of the above. 4. The position change amount output from the absolute value encoder when the rotor rotates by one cycle of the magnetic field is set to a digital value of 2 ⁿ (n is a positive number). The hoisting machine for an elevator according to claim 2. 5. The elevator hoisting machine according to claim 3, wherein the rack comprises a plurality of curved pieces, and the racks are mounted on a drive sheave with gaps formed at the ends of the curved pieces facing each other. . 6. An auxiliary gear is provided in the middle of the length of the bending piece to drive either an auxiliary encoder or an auxiliary absolute value encoder when the gear is opposed to a position where the bending pieces face each other. The hoisting machine for an elevator according to claim 5, wherein 7. A gear provided at a position lower than a center of rotation of the drive sheave, and a cover provided at a fixed portion and surrounding the outside of the rack and provided except for the gear portion. The hoisting machine for an elevator according to claim 1, wherein the hoisting machine is for an elevator.