JP2012001351A - Driving sheave and elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a drop in the traction performance of an elevator while suppressing the abrasion of a driving sheave or a main rope.SOLUTION: The elevator includes the driving sheave 10, the main rope 40, and the like. In the driving sheave 10, a sheave groove 12, the inner face of which is covered with a lining material 30, is formed in the circumferential direction. For the main rope 40, a car and a balancing weight are hung down, and it is wound on the driving sheave 10. The inner face of the sheave groove 12 is composed of a bottom face 14 and two flanks 16. For the bottom face 14, the cross section is made flat, and a corner 18 is created at the border between the bottom face 14 and each flank 16. The main rope 40 abuts on a part of the bottom face 14 and a part of the flank 16, and there is space between itself and the corner 18.

Description

  Embodiments of the present invention relate to a drive sheave around which a main rope of an elevator is wound, and an elevator including the drive sheave.

  As shown in FIG. 10, the elevator is constructed by winding a plurality of main ropes 40 with a car 50 suspended at one end and a counterweight 52 suspended at the other end. ing. The car 50 and the counterweight 52 are installed in the hoistway 54 so as to be able to be raised and lowered. A machine room 56 is provided above the hoistway 54, and a hoisting machine 60 and a control panel 58 are installed in the machine room 56.

  As shown in FIG. 11, the hoisting machine 60 includes a drive sheave (groove wheel) 10 that is rotated by driving of a motor 62. A plurality of sheave grooves 12 extending in the circumferential direction are formed in the drive sheave 10. The plurality of main ropes 40 are respectively fitted into the plurality of sheave grooves 12 and wound around the drive sheave 10.

  When the motor 62 of the hoisting machine 60 is driven to rotate the drive sheave 10, the main rope 40 is moved by friction between the drive sheave 10 and the main rope 40, and the car 50 and the counterweight 52 are moved up and down the hoistway 54. Move up and down.

JP-A-10-194628

  12 and 13 are diagrams schematically showing the distribution of the force that the inner surface of the sheave groove receives from the main rope on the transverse section of the sheave groove of the drive sheave. As shown in FIGS. 12 and 13, the inner surfaces of the sheave grooves 12 of the drive sheaves 10a and 10b are covered with a lining material 30 made of resin or the like. The lining material 30 plays a role of increasing the friction between the drive sheave 10 and the main rope 40 and improving the traction performance of the elevator.

  Here, in the drive sheave 10a shown in FIG. 12, the sheave groove 12 is formed in a circular arc shape in cross section. When this drive sheave 10a is used, the contact area between the main rope 40 and the sheave groove 12 is large, and the force that the inner surface of the sheave groove 12 receives from the main rope 40 (that is, the force that the main rope 40 receives from the inner surface of the sheave groove 12). Is distributed. That is, the surface pressure that the inner surface of the sheave groove 12 receives from the main rope 40 is reduced. Therefore, the drive sheave 10a and the main rope 40 are not easily worn, and their life can be made relatively long.

  However, when the load of the car 50 and the counterweight 52 is applied to the main rope 40, the rope grease impregnated in the main rope 40 oozes out from the main rope 40. The rope grease that intervenes on the inner surface of the sheave groove 12 with which the main rope 40 abuts (hereinafter referred to as “the abutment surface of the sheave groove 12”) acts on the friction between the main rope 40 and the inner surface of the sheave groove 12. Reduce power. As a result, the traction performance of the elevator is degraded.

  On the other hand, in the drive sheave 10b shown in FIG. 13, the sheave groove 12 has a substantially V-shaped cross section. When this drive sheave 10b is used, the contact area between the main rope 40 and the sheave groove 12 is small, and the surface pressure that the inner surface of the sheave groove 12 receives from the main rope 40 increases. Therefore, the rope grease that oozes out from the main rope 40 and is interposed between the main rope 40 and the contact surface of the sheave groove 12 is pushed out from between the contact surface of the main rope 40 and the sheave groove 12. As a result, the frictional force acting between the main rope 40 and the inner surface of the sheave groove 12 becomes large, and the traction performance of the elevator becomes relatively good. However, since the surface pressure that the inner surface of the sheave groove 12 receives from the main rope 40 is large, the drive sheave 10b and the main rope 40 are easily worn, and their life is relatively shortened.

  Then, embodiment of this invention was made | formed in order to solve the above-mentioned subject, and it aims at suppressing the fall of the traction performance of an elevator, suppressing abrasion of a drive sheave and a main rope.

  In order to achieve the above object, a drive sheave according to an embodiment of the present invention has a sheave groove whose groove inner surface is covered with a lining material along the circumferential direction, and the main rope of the elevator is the sheave groove. A drive sheave of an elevator that is fitted and wound around, wherein a cross section of the bottom surface of the sheave groove is formed flat, and a corner is formed at the boundary between the bottom surface of the sheave groove and the side surface of the sheave groove It is characterized by being.

  In order to achieve the above object, an elevator according to an embodiment of the present invention is impregnated with a drive sheave in which a sheave groove whose inner surface is covered with a lining material is formed along a circumferential direction, and rope grease. An elevator comprising a main rope fitted into the sheave groove and wound around the drive sheave, wherein a cross section of the bottom surface of the sheave groove is formed flat, and the sheave groove A corner is formed at the boundary between the bottom surface and the side surface of the sheave groove.

It is a cross-sectional view of the sheave groove of the drive sheave according to the first embodiment of the present invention. It is the figure which added typically the distribution of the force which the inner surface of a sheave groove receives from a main rope on the cross section of the sheave groove of the drive sheave concerning a 1st embodiment of the present invention. It is the table | surface which showed the test result regarding the traction performance of the elevator which concerns on the 1st Embodiment of this invention, and abrasion of a drive sheave. It is a cross-sectional view of the sheave groove of the drive sheave according to the second embodiment of the present invention. It is a cross-sectional view of the sheave groove of the drive sheave according to the third embodiment of the present invention. It is the schematic elevation which showed the drive sheave and the cleaning brush which concern on the 3rd Embodiment of this invention. It is a cross-sectional view of the sheave groove of the drive sheave according to the fourth embodiment of the present invention. It is a cross-sectional view of the sheave groove of the drive sheave according to the fifth embodiment of the present invention. It is a cross-sectional view of the sheave groove of the drive sheave according to the sixth embodiment of the present invention. It is the schematic elevation sectional view which showed the structure of the elevator. It is the schematic elevation which showed the structure of the elevator hoist. It is the figure which added typically the distribution of the force which the inner surface of a sheave groove receives from a main rope on the cross section of the sheave groove of a drive sheave. It is the figure which added typically the distribution of the force which the inner surface of a sheave groove receives from a main rope on the cross section of the sheave groove of a drive sheave.

[First Embodiment]
A drive sheave and an elevator according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a sheave groove of a drive sheave. FIG. 2 is a diagram schematically showing the distribution of the force that the inner surface of the sheave groove receives from the main rope on the cross section of the sheave groove of the drive sheave. FIG. 3 is a table showing test results regarding elevator traction performance and main rope wear.

  The elevator according to this embodiment includes a drive sheave 10 and a plurality of main ropes 40. As shown in FIG. 10, the plurality of main ropes 40 are wound around the drive sheave 10 with a car 50 suspended at one end and a counterweight 52 suspended at the other end.

  The car 50 and the counterweight 52 are installed in the hoistway 54 so as to be able to be raised and lowered. A machine room 56 is provided above the hoistway 54, and a hoisting machine 60 and a control panel 58 are installed in the machine room 56. As shown in FIG. 11, the hoisting machine 60 includes a driving sheave (groove wheel) 10 that rotates by driving of a motor 62, and is placed on a hoisting machine base 64.

  When the motor 62 of the hoisting machine 60 is driven to rotate the drive sheave 10, the main rope 40 is moved by friction between the drive sheave 10 and the main rope 40, and the car 50 and the counterweight 52 are moved up and down the hoistway 54. Move up and down.

  The drive sheave 10 according to the present embodiment is formed with a plurality of (for example, six) sheave grooves 12 extending over the entire circumference along the circumferential direction, and the plurality of sheave grooves 12 are driven mutually. The sheaves 10 are arranged side by side in the axial direction.

  The groove inner surface of the sheave groove 12 is covered with a lining material 30. The lining material 30 plays a role of improving the traction performance of the elevator by increasing the frictional force acting between the main rope 40 and the inner surface of the sheave groove 12. In addition, the lining material 30 plays a role of suppressing wear of the main rope 40.

  The inner surface of the sheave groove 12 is formed from a bottom surface 14 and two side surfaces 16. The bottom surface 14 of the sheave groove 12 is formed flat so that its cross section (cross section perpendicular to the direction in which the sheave groove 12 extends) is parallel to the axis of the drive sheave 10. Further, the side surface 16 of the sheave groove 12 extends outward, and is formed in an arc concave shape corresponding to the shape of the main rope 40 around which the cross section is wound. A corner 18 is formed at the boundary between the bottom surface 14 and the side surface 16 of the sheave groove 12.

  As shown in FIGS. 1 and 11, the plurality of main ropes 40 are fitted into the plurality of sheave grooves 12 and wound around the drive sheave 10. When the load of the car 50 and the counterweight 52 is applied to the main rope 40, the main rope 40 is slightly flattened and comes into contact with a part of the bottom surface 14 and a part of the side surface 16 of the sheave groove 12. Here, the main rope 40 does not come into contact with the corner 18, and a gap 20 is left between the main rope 40 and the corner 18.

  The operation of the drive sheave 10 according to the present embodiment will be described.

  In a state where the main rope 40 is wound around the drive sheave 10, the main rope 40 has a gap 20 between the corner portion 18 and a part of the bottom surface 14 and the side surface 16 of the sheave groove 12. Touching. In FIG. 2, forces 90 a and 90 b that the inner surface of the sheave groove 12 receives from the main rope 40 are schematically indicated by arrows. The force 90 a that the bottom surface 14 receives from the main rope 40 is larger than the force 90 b that the side surface 16 receives from the main rope 40. Therefore, the surface pressure that the bottom surface 14 receives from the main rope 40 is larger than the surface pressure that the side surface 16 receives from the main rope 40.

  Here, the main rope 40 is impregnated with rope grease for improving durability. When the main rope 40 is wound around the drive sheave 10 and the load of the car 50 and the counterweight 52 is applied to the main rope 40, the rope grease impregnated in the main rope 40 oozes out from the main rope 40. In the present embodiment, a gap 20 between the main rope 40 and the corner 18 is formed. Therefore, the rope grease interposed between the main rope 40 and the contact surface of the sheave groove 12 is pushed out into the gap 20 and collected in the gap 20. As a result, it is possible to suppress the friction force acting between the main rope 40 and the inner surface of the sheave groove 12 from being reduced by the rope grease. As a result, a reduction in elevator traction performance can be suppressed.

  3 shows a drive sheave 10 according to the present embodiment, a drive sheave 10a (FIG. 12) in which a sheave groove 12 having an arc-shaped cross section is formed, and a drive sheave 10b in which a sheave groove 12 having a substantially V-shaped cross section is formed. The traction ratio when (FIG. 13) is used is shown. The traction ratio means that the main rope 40 is wound around the drive sheave, one end of the main rope 40 is fixed, and the weight is suspended at the other end. The tension ratio was measured.

  When the drive sheave 10 according to the present embodiment is used, the traction ratio is large and the traction performance is excellent as compared with the case where the drive sheave 10a (FIG. 12) that does not escape the leaked rope grease is used. I understand that.

  In the present embodiment, the main rope 40 is in contact with the bottom surface 14 and the two side surfaces 16. Therefore, the force that the inner surface of the sheave groove 12 receives from the main rope 40 (that is, the force that the main rope 40 receives from the inner surface of the sheave groove 12) is dispersed, and wear of the drive sheave 10 and the main rope 40 can be suppressed.

  3 shows a drive sheave 10 according to the present embodiment, a drive sheave 10a (FIG. 12) in which a sheave groove 12 having an arc-shaped cross section is formed, and a drive sheave 10b in which a sheave groove 12 having a substantially V-shaped cross section is formed. Fig. 13 shows the worn state of the drive sheave when (Fig. 13) is used. This is a visual inspection of the worn state of the drive sheave after use for 2 months.

  When the drive sheave 10 according to the present embodiment is used, the wear state may be better than when the drive sheave 10b (FIG. 13) in which the main rope 40 abuts only on the two side surfaces 16 is used. I understand.

  As described above, according to the drive sheave 10 and the elevator according to the present embodiment, it is possible to suppress the deterioration of the traction performance of the elevator while suppressing the wear of the drive sheave 10 and the main rope 40.

[Second Embodiment]
A drive sheave and an elevator according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the sheave groove of the drive sheave. In addition, since this embodiment is a modification of 1st Embodiment, the same code | symbol is attached | subjected to an overlapping part and description of the structure of the part is abbreviate | omitted.

  In the present embodiment, the side surface 16 of the sheave groove 12 has a flat cross section. That is, the cross section of the sheave groove 12 is formed in a trapezoidal shape. Also according to this embodiment, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
A drive sheave and an elevator according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the sheave groove of the drive sheave. FIG. 6 is a schematic elevation view showing the drive sheave and the cleaning brush. In addition, since this embodiment is a modification of 1st Embodiment, the same code | symbol is attached | subjected to an overlapping part and description of the structure of the part is abbreviate | omitted.

  In the present embodiment, the bottom surface 14 of the sheave groove 12 is formed with a grease relief groove 22 that extends over the entire circumference along the circumferential direction. The grease release groove 22 plays a role of releasing rope grease interposed between the main rope 40 and the bottom surface 14.

  As described with reference to FIG. 2 in the first embodiment, the force 90 a that the bottom surface 14 receives from the main rope 40 is larger than the force 90 b that the side surface 16 receives from the main rope 40. Therefore, the frictional force that acts between the main rope 40 and the bottom surface 14 is greater due to the frictional force that acts between the main rope 40 and the side surface 16, and greatly contributes to the traction performance. In this embodiment, since the grease escape groove 22 is formed on the bottom surface 14 of the sheave groove 12, the traction performance can be further improved.

  The width of the grease escape groove 22 is preferably 10% or less of the diameter of the main rope 40 in order to prevent the main rope 40 from being worn.

  The elevator according to the present embodiment has a cleaning brush 70. The cleaning brush 70 is installed on the hoisting machine base 64 so that the tip of the cleaning brush 70 enters the sheave groove 12 and the grease escape groove 22 from below the drive sheave 10. As the drive sheave 10 rotates, the cleaning brush 70 cleans the sheave groove 12 and the grease escape groove 22 over the entire circumference. According to this embodiment, since the cleaning brush 70 scrapes off the rope grease collected in the grease escape groove 22, it is possible to suppress a decrease in the traction performance of the elevator.

[Fourth Embodiment]
A drive sheave and an elevator according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view of the sheave groove of the drive sheave. In addition, since this embodiment is a modification of said embodiment, it attaches | subjects the same code | symbol to an overlapping part, and abbreviate | omits description of the structure of the part.

  This embodiment is a combination of the second embodiment and the third embodiment. In the present embodiment, the side surface 16 of the sheave groove 12 of the drive sheave 10 according to the third embodiment is formed flat as in the second embodiment. According to this embodiment, the same effect as that of the third embodiment can be obtained.

[Fifth Embodiment]
A fifth embodiment of the drive sheave and the elevator according to the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of the sheave groove of the drive sheave. In addition, since this embodiment is a modification of 3rd Embodiment, it attaches | subjects the same code | symbol to an overlapping part, and abbreviate | omits description of the structure of the part.

  In the present embodiment, a grease relief groove 24 is formed on the side surface 16 of the sheave groove 12 so as to extend over the entire circumference along the circumferential direction. The grease relief groove 24 plays a role of releasing the rope grease interposed between the main rope 40 and the side surface 16. In order to prevent the main rope 40 from being worn, it is desirable that the width of the grease relief groove 22 be 10% or less of the diameter of the main rope 40. According to the present embodiment, the frictional force acting between the main rope 40 and the side surface 16 can be increased, and the traction performance can be further improved.

[Sixth Embodiment]
A sixth embodiment of the drive sheave and the elevator according to the present invention will be described with reference to FIG. FIG. 9 is a cross-sectional view of the sheave groove of the drive sheave. In addition, since this embodiment is a modification of said embodiment, it attaches | subjects the same code | symbol to an overlapping part, and abbreviate | omits description of the structure of the part.

  This embodiment is a combination of the second embodiment and the fifth embodiment. In the present embodiment, the side surface 16 of the sheave groove 12 of the drive sheave 10 according to the fifth embodiment is formed flat as in the second embodiment. Also in this embodiment, the same effect as that of the fifth embodiment can be obtained.

[Other Embodiments]
The first to sixth embodiments are merely examples, and the present invention is not limited to these. For example, in the third embodiment, the grease relief groove 22 extending over the entire circumference along the circumferential direction is formed, but it is not necessarily required to extend over the entire circumference. Further, in the fifth embodiment, the grease escape grooves 22 and 24 are formed on both the bottom surface 14 and the side surface 16 of the sheave groove 12, but may be formed only on the side surface 16.

DESCRIPTION OF SYMBOLS 10 ... Drive sheave, 12 ... Sheave groove, 14 ... Bottom face of sheave groove, 16 ... Side face of sheave groove, 18 ... Corner part of sheave groove, 20 ... Clearance between main rope and corner part, 22, 24 ... Grease Ditch, 30 ... Lining material, 40 ... Main rope, 50 ... Ride car, 52 ... Counterweight, 54 ... Hoistway, 56 ... Machine room, 58 ... Control panel, 60 ... Hoisting machine, 62 ... Motor, 64 ... Hoisting machine stand, 70 ... Cleaning brush

Claims (14)

A sheave groove whose groove inner surface is covered with a lining material is formed along the circumferential direction, and an elevator drive sheave in which the main rope of the elevator is fitted and wound around the sheave groove,
A drive sheave for an elevator, wherein a cross section of the bottom surface of the sheave groove is formed flat, and a corner is formed at a boundary between the bottom surface of the sheave groove and a side surface of the sheave groove.   2. The drive sheave for an elevator according to claim 1, wherein a cross section of a side surface of the sheave groove is formed in an arc shape.   The elevator drive sheave according to claim 1, wherein a lateral cross section of the sheave groove is flat.   The elevator drive sheave according to any one of claims 1 to 3, wherein a first grease relief groove is formed along a circumferential direction on a bottom surface of the sheave groove.   The drive sheave for an elevator according to claim 4, wherein the width of the first grease relief groove is 10% or less of the diameter of the main rope.   The elevator drive sheave according to any one of claims 1 to 5, wherein a second grease relief groove is formed along a circumferential direction on a side surface of the sheave groove.   The drive sheave for an elevator according to claim 6, wherein the width of the second grease relief groove is 10% or less of the diameter of the main rope. A drive sheave in which a sheave groove whose groove inner surface is covered with a lining material is formed along a circumferential direction;
A main rope which is impregnated with rope grease and is fitted into the sheave groove and wound around the drive sheave;
An elevator equipped with
An elevator characterized in that a cross section of a bottom surface of the sheave groove is formed flat, and a corner is formed at a boundary between the bottom surface of the sheave groove and a side surface of the sheave groove.   The main rope is in contact with a part of a bottom surface of the sheave groove and a part of a side surface of the sheave groove, and there is a gap between the main rope and the corner part. Item 9. The elevator according to item 8.   The elevator according to claim 8 or 9, wherein a cross section of a side surface of the sheave groove is formed in an arc shape.   The elevator according to claim 8 or 9, wherein a lateral cross section of the sheave groove is flat.   The elevator according to any one of claims 8 to 11, wherein a first grease relief groove is formed along a circumferential direction on a bottom surface of the sheave groove.   The elevator according to claim 12, further comprising a cleaning brush installed so as to enter the first grease escape groove or the second grease escape groove from below the drive sheave.   The elevator according to claim 13, wherein the cleaning brush cleans the first grease escape groove or the second grease escape groove when the drive sheave rotates.

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