JP2002362864A - Drive sheave of elevator hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple-structured drive sheave of an elevator hoist capable of normally transmitting the torque generated by a sheave body to plural rope groove pieces mounted on the outer peripheral face of the sheave body. SOLUTION: The sheave body 13 has the outer peripheral face 14 consisting of a cylindrical face, and a rope groove 18 is formed on the outer surface of the circular arc of the rope groove pieces 17 with a fan-shaped vertical section. The end faces in the longitudinal direction of the plural rope groove pieces 17 are made to face each other to form a ring, which is jointed to the outer peripheral face 14 of the sheave body 13. A stretcher of a parallel key 20 is disposed in the direction along the rotation axis of the sheave body 13, with one side engaged with the outer peripheral face 14 and the other side engaged with the rope groove pieces 17. A wedge piece 23 is forced into the space between the end faces in the longitudinal direction of the rope groove pieces 17 opposite to each other to press the rope groove pieces 17 in such a direction as to separate them from each other. Then, the rope groove pieces 17 are firmly jointed to the sheave body 13 with the wedge piece 23 being forced into the space between the rope groove pieces 17 and the rope groove pieces 17 being pressed against the parallel key 20 and closely in contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive sheave for an elevator hoist that pulls a main rope wound thereon and drives a lifting body suspended from the main rope.

[0002]

2. Description of the Related Art FIG. 8 to FIG.
FIG. 8 is a view showing a drive sheave of a conventional elevator hoisting machine disclosed in Japanese Patent No. 2444, FIG. 8 is a side view showing the elevator hoisting machine in a partially longitudinal view, and FIG. Main part right side enlarged view of the drive sheave, FIG. 10 is AA of FIG.
It is a line sectional view. In the figure, reference numeral 1 denotes an elevator hoist, which includes an electric motor unit 2, an electromagnetic brake 3, a bearing stand 4, and a shaft 5.
And a drive sheave 8 in which a sheave groove 6 and a brake sheave 7 are formed.

Reference numeral 9 denotes a rope groove piece which forms the rope groove portion 6. The rope groove piece 10 has a fan-shaped longitudinal section, and a rope groove 10 is recessed in a direction along the length of the outer surface of the circular arc. And the inner surface of the arc is arranged on the outer peripheral surface of the drive sheave 8. Reference numeral 11 denotes a radial tightening bolt which is inserted into the rope groove piece 9 from the arcuate outer surface of the rope groove piece 9 and screwed into the outer peripheral surface of the drive sheave 8, and 12 denotes a drive rope sheave 8 from the side outer surface of the drive sheave 8.
And an axial tightening bolt screwed into the side of the rope groove piece 9 near the inner surface of the arc.

The drive sheave of a conventional elevator hoist is constructed as described above, and a plurality of rope groove pieces 9 are arranged with their longitudinal ends facing each other to form a ring, thereby forming a drive sheave 8. Rope section 6 is formed. Each rope groove piece 9 has a radial tightening bolt 11 and an axial tightening bolt 12.
Is attached to the drive sheave 8, and the rope groove piece 9 forms the rope groove 10. Although not shown, the main rope suspending the elevating body is wound around the rope 10 and
When the drive sheave 8 rotates, the lifting body is driven up and down via the main rope.

[0005]

In the drive sheave of the conventional elevator hoist as described above, the torque of the drive sheave 8 is transmitted by the plurality of rope grooves 9 so that the drive of the rope grooves 9 is performed. Positioning of the sheave 8 in the rotation axis direction and the sheave groove pieces 9
Requires positioning when replacing For this reason, although not shown, the rope groove piece 9 is mounted at a predetermined position on the drive sheave 8 by a member such as a tapered bolt or a conical sleeve as described in Japanese Utility Model Publication No. 59-12444. There is a need to.

[0006] Accordingly, the rope sheave piece 9 is moved relative to the drive sheave 8.
A large number of members are required to mount the cable in a predetermined position, the structure is complicated and the cost is increased, and the assembling and replacing of the rope groove piece 9 is troublesome and takes a long time. For this reason, there was a problem that productivity in the production of the hoisting machine and the maintenance work of the elevator was reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a simple structure in which torque for driving a main rope in a driving sheave is normally transmitted to a plurality of rope grooves. The purpose is to obtain a drive sheave for an elevator hoist.

[0008]

In a drive sheave for an elevator hoist according to the present invention, a sheave body having an outer peripheral surface having a cylindrical surface and a fan-shaped longitudinal section are formed in a direction along the length of the outer surface of the circular arc. A rope groove is recessed, a plurality of rope grooves are arranged with their longitudinal end faces facing each other to form a ring, and an arc inner surface is arranged on the outer peripheral surface of the rope body, and a rope groove piece, Fasteners fastened to the outer surface of the rope body, and the longitudinal direction is arranged in the direction along the rotation axis of the rope body, one surface is fitted to the outer surface of the rope body, and the other surface is fitted to the inner side of the arc of the rope groove piece The parallel key and the longitudinal end faces of the rope groove pieces that are press-fitted to each other are arranged closer to the inner side of the circular arc than the rope groove bottom surfaces of the rope groove pieces, and the longitudinal ends of the rope groove pieces facing each other are separated from each other. Is provided.

Further, in the drive sheave for an elevator hoist according to the present invention, one end of a longitudinal side has a recess corresponding to a parallel key, and the other end of the longitudinal side has a wedge-shaped recess corresponding to a wedge piece. A rope groove piece having one side formed is provided.

Further, in the drive sheave of the elevator hoist according to the present invention, a wedge piece having an inclination angle a that satisfies the relationship of tan a <the friction coefficient between the rope groove piece and the wedge piece is provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 7 show an example of an embodiment of the present invention. FIG. 1 is a side view of a main part of a drive sheave, FIG. 2 is an enlarged cross-sectional view taken along line BB of FIG.
4 is an enlarged cross-sectional view taken along line CC of FIG. 1, FIG. 4 is an enlarged cross-sectional view taken along line DD of FIG. 1, FIG. 5 is an enlarged cross-sectional view taken along line EE of FIG. 1, and FIG. 7 is an enlarged view of a wedge piece in FIG. 5. In the drawing, reference numeral 13 denotes a rope body, an outer peripheral surface 14 formed of a cylindrical surface, a step portion 15 formed on one side in the width direction of the outer peripheral surface 14, and a diameter larger than the outer peripheral surface 14 formed on the outer periphery of the step portion 15. Are provided.

Numeral 17 denotes a rope groove piece, which has a fan-shaped longitudinal section, a plurality of which are arranged with their end faces facing each other to form a ring, and a rope groove 18 is recessed in a direction along the length of the arc outer surface. The width direction on the inner surface side of the arc is fitted and arranged in a groove-shaped recess forming the outer peripheral surface 14 of the rope body 13. Reference numeral 19 denotes a fastener, which is formed of a bolt that is inserted into the rope groove piece 17 from the outer surface of the arc and is screwed into the outer peripheral surface 14 of the rope body 13, and fastens the rope groove piece 17 to the rope body 13.

Reference numeral 20 denotes a parallel key, the length of which is arranged in a direction along the rotation axis of the rope body 13, one surface of which is fitted into a recess 21 provided on the outer peripheral surface 14 of the rope body 13, and the other surfaces of which are opposed to each other. The fitting ends 22 formed in the longitudinal direction of the rope groove piece 17 are formed at the one ends of the longitudinal grooves 17. Reference numeral 23 denotes a wedge piece, which is arranged in a direction along the rotation axis of the rope body 13 and is press-fitted into a wedge-shaped recess 24 formed at the other ends of the rope grooves 17 opposed to each other. 13 is disposed in contact with the outer peripheral surface 14, that is, closer to the inner surface of the circular arc than the bottom surface of the rope groove 18 of the rope groove piece 17.

Reference numeral 25 denotes a pressing means. The screw hole 2 is disposed on the side surface of the step portion 15 and is disposed on the side surface of the step portion 15 and is disposed opposite to the wide end of the wedge piece 23.
6 and a lock nut 28 screwed into the bolt 27 and arranged on the side surface of the step portion 15. One side of the recess 21 corresponding to the parallel key 20 is formed at one longitudinal end of the rope groove piece 17,
One end of the wedge-shaped recess 24 corresponding to the wedge piece 23 is formed at the other end of the longitudinal direction.

Then, the first rope groove pieces 17 adjacent to each other are provided.
Parallel key 20 between the longitudinal end faces of the
And a wedge-shaped recess of the wedge piece 23 between the other end face of the second rope groove piece 17 and the longitudinal end face of the third rope groove piece 17 adjacent to this end face. 24 are configured.
In this way, the fitting portions 22 and the wedge-shaped recesses 24 are alternately formed between the longitudinal end faces of the rope groove pieces 17 adjacent to each other.

In FIG. 7, T is a torque transmitted from the rope body 13 to the rope groove piece 17, P is a pressing force acting on the inclined surface of the wedge piece 23 by the torque T, and S is a torque applied to the wedge piece 23 by the torque T. The withdrawing force acting, a, is the angle of inclination of the inclined surface of the wedge piece 23 and is the angle formed between the parallel line corresponding to the wide end width of the wedge piece 23 and the inclined surface.

In the drive sheave of the elevator hoist constructed as described above, the parallel key 20 is fitted into the recess 21 on the outer peripheral surface 14 of the rope body 13. And the rope body 13
A parallel key 20 is fitted on the outer peripheral surface 14 of the rope groove piece 17 at one longitudinal end thereof, and in this state, a gap l1 shown in FIG. ₁ is formed between the end faces of the rope groove pieces 17 adjacent to each other. Is done. The wedge piece 23 is fitted into a wedge-shaped recess 24 formed between the other longitudinal ends of the rope groove piece 17.

Next, the rope groove pieces 17 are temporarily fastened to the outer peripheral surface 14 of the rope body 13 by the fasteners 19. The bolt 27 of the pressing means 25 is connected to the step portion 1 of the rope body 13.
5 to press the wide end of the wedge piece 23.
Thus, the longitudinal end faces of the rope groove pieces 17 facing each other are pressed in a direction away from each other, and the rope groove pieces 17
Is displaced along the outer peripheral surface 14 of the wire, and the other longitudinal end of the rope groove piece 17 comes into close contact with the parallel key 20. Thereafter, the fasteners 19 are tightened again, and the rope groove pieces 17 are respectively attached to the outer peripheral surface 14 of the rope body 13.
Fixedly.

As described above, the rope groove piece 17 is
3 and pressed against the parallel key 20,
The fastener 19 is fixedly fastened to the outer peripheral surface 14 of the rope body 13. Accordingly, when the rope body 13 is rotated similarly to the above-described hoist shown in FIG. 8 and the lifting body is driven up and down through the main rope wound around the rope 18, the rotation of the rope body 13 is correct. The torque is normally transmitted from the rope body 13 to the rope groove piece 17 without play regardless of the rotation or the reverse rotation.

In the elevator car, since the torque is transmitted normally, the ride comfort can be improved without generating any shock or vibration. Also, since no slip occurs between the rope body 13 and the rope groove piece 17,
The occurrence of wear and damage in both of the above is reduced, so that maintenance costs can be reduced. Furthermore, a normal torque transmission action can be obtained with a simple device configuration, and the manufacturing cost of the drive sheave of the hoist can be reduced. Further, the rope groove pieces 17 can be attached and replaced by a simple operation, so that the operation time can be shortened, and the productivity in the manufacture of the hoisting machine and the maintenance work of the elevator can be improved.

Further, by setting the inclination angle a of the inclined surface of the wedge piece 23 in FIG. 7 as tan a <the coefficient of friction between the rope groove piece 17 and the wedge piece 23, the pulling force S of the wedge piece 23 shown in FIG.
The resistance to the pull-out force due to friction is larger than that. For this reason, the wedge piece 23 does not come off due to the action of the torque T, and the configuration of the pressing means 25 can be simplified. For example, the diameter of the bolt 27 can be reduced, and the manufacturing cost can be reduced.

[0022]

As described above, according to the present invention, a rope body having an outer peripheral surface formed by a cylindrical surface, a rope groove formed in a direction along the longitudinal direction of a circular arc outer surface having a fan-shaped vertical section, and A rope groove piece whose longitudinal end faces are opposed to each other to form a ring, and an inner circular arc surface is arranged on the outer peripheral surface of the rope body, and a fastener that fastens each of these rope groove pieces to the outer peripheral surface of the rope body. The parallel key whose length is arranged in the direction along the rotation axis of the rope body, one face is fitted to the outer peripheral surface of the rope body, and the other face is fitted to the inner side of the arc of the rope groove piece, A wedge piece which is press-fitted between the opposed longitudinal end faces and is disposed closer to the inner surface of the circular arc than the rope groove bottom face of the rope groove piece and presses the opposed longitudinal end faces of the rope groove pieces in directions away from each other. It is.

Thus, the wedge piece is pressed into the gap between the longitudinal end faces of the rope groove piece, whereby the rope groove piece is pressed and closely attached to the parallel key. In this state, the wedge is attached to the outer peripheral surface of the rope body by the fastener. The pieces are fixedly fastened. Therefore, when the hoist body rotates by the operation of the hoist and the elevating body is driven up and down through the main rope wound around the rope groove, the rotation of the rope body is either forward rotation or reverse rotation. Even though the torque is transmitted normally from the rope body to the rope groove pieces without play.
For this reason, it is possible to improve the ride comfort without generating any shock or vibration in the elevator car. Furthermore, a normal torque transmission action can be obtained with a simple device configuration, and the manufacturing cost of the drive sheave of the hoist can be reduced. In addition, the installation and replacement of the rope groove pieces can be carried out by a simple operation, so that the operation time can be shortened, and there is an effect of improving the productivity in the production of the hoist and the maintenance work of the elevator.

In addition, according to the present invention, as described above, one side of the recess corresponding to the parallel key is formed at one longitudinal end,
The other end of the longitudinal direction is provided with a rope groove piece in which one side of a wedge-shaped recess corresponding to the wedge piece is formed.

Thus, the wedge piece is pressed into the gap between the longitudinal end faces of the rope groove piece, so that the rope groove piece is pressed by the parallel key and adheres closely. In this state, the groove is formed on the outer peripheral surface of the rope body body by the fastener. The pieces are fixedly fastened. Therefore, when the hoist body rotates by the operation of the hoist and the elevating body is driven up and down through the main rope wound around the rope groove, the rotation of the rope body is either forward rotation or reverse rotation. Even though the torque is transmitted normally from the rope body to the rope groove pieces without play.
For this reason, it is possible to improve the ride comfort without generating any shock or vibration in the elevator car. Furthermore, a normal torque transmission action can be obtained with a simple device configuration, and the manufacturing cost of the drive sheave of the hoist can be reduced. In addition, the installation and replacement of the rope groove pieces can be carried out by a simple operation, so that the operation time can be shortened, and there is an effect of improving the productivity in the production of the hoist and the maintenance work of the elevator.

Further, as described above, the present invention provides t
An an <a wedge piece having an inclination angle a that satisfies the relationship of <friction coefficient between the rope groove piece and the wedge piece is provided.

[0027] Thus, the pulling force of the wedge piece is smaller than that of the wedge piece.
Resistance to the pull-out force due to friction increases. Therefore, the wedge piece does not come off due to the action of the torque transmitted from the rope body, and the configuration of the pressing means can be simplified. For example, the diameter of the bolt can be reduced, and the production cost can be reduced. is there.

[Brief description of the drawings]

FIG. 1 is a view showing Embodiment 1 of the present invention, and is a side view of a main part of a drive sheave.

FIG. 2 is an enlarged cross-sectional view taken along line BB of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line CC of FIG. 1;

FIG. 4 is an enlarged cross-sectional view taken along line DD of FIG. 1;

FIG. 5 is an enlarged sectional view taken along line EE of FIG. 1;

FIG. 6 is an enlarged sectional view taken along line FF of FIG. 5;

FIG. 7 is an enlarged view of a wedge piece in FIG. 5;

FIG. 8 is a view showing a drive sheave of a conventional elevator hoist, and is a side view showing the elevator hoist partially partially longitudinally.

9 is an enlarged right side view of a main part of the drive sheave of the elevator hoist of FIG. 8;

FIG. 10 is a sectional view taken along line AA of FIG. 9;

[Explanation of symbols]

13 rope body, 14 outer peripheral surface, 17 rope groove piece,
18 ropes, 19 fasteners, 20 parallel keys,
21 recess, 23 wedge piece, 24 wedge-shaped recess.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fuka Aoki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Koji Ogawa 2-3-2 Marunouchi 3-chome, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Juntaro Taniguchi 2-3-2, Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3F306 BB01 BB05 3J031 AA03 BA03 CA03 CA07 CA10

Claims (3)

[Claims] 1. A rope body having an outer peripheral surface formed of a cylindrical surface, a rope groove formed in a vertical section having a fan shape in a direction along the length of the outer surface of the circular arc, and a plurality of the ropes are arranged with their longitudinal end faces facing each other. Forming a circular ring, the arc inner surface of which is disposed on the outer peripheral surface of the rope body, a fastener for fastening these rope grooves to the outer peripheral surface of the rope body, respectively, A parallel key that is arranged in the direction along the rotation axis of the fitting, one surface is fitted to the outer peripheral surface of the rope body and the other surface is fitted to the rope groove piece,
It is press-fitted between the mutually opposed longitudinal end faces of the rope groove piece and arranged closer to the inner surface of the arc than the rope groove bottom surface,
A drive sheave for an elevator hoist, comprising: a wedge piece that presses the opposed longitudinal end surfaces in directions away from each other. 2. The rope groove piece is formed such that one side of a recess corresponding to the parallel key is formed at one longitudinal end and one side of a wedge-shaped recess corresponding to the wedge piece is formed at the other longitudinal end. The drive sheave for an elevator hoist according to claim 1, wherein: 3. The wedge piece according to claim 1, wherein the wedge piece has an inclination angle a of tan a <the coefficient of friction between the rope groove piece and the wedge piece. The drive sheave of the elevator hoist described.