JP2007031056A - Elevator and its hoisting rope guiding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an elevator car to rise to the top of a shaft by maintaining in aligned condition the portion of a hoisting rope that extends upward from a car side sheave. <P>SOLUTION: A hoisting rope guiding device of an elevator is equipped with a guide means 20 installed over the car side sheave 6R having at least a peripheral surface convex to upward and shaped in a semi-circular column whereon the portion 40e of the hoisting rope 40 extending upward from the car side sheave 6R on the right is set winding and a hitch part 30 arranged below the guide means 20 whereto the end of the rope portion 40d wound fast on the guide means 20 and stretching downward is secured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a device for guiding an elevator hoisting rope, and more particularly, to a hitch portion provided at the top of a hoistway while maintaining a portion of the hoisting rope extending upward from the car sheave in an aligned state It relates to the technology to guide.

The general structure of a conventional elevator will be outlined with reference to FIG. 10. The car 1 is guided by a pair of left and right car side guide rails 2L and 2R to move up and down in a hoistway provided in the building.
A pair of left and right doors 3L and 3R provided on the front surface of the car 1 open and close in the left-right direction.
The car frame that supports the car 1 has an upper beam 4 that extends horizontally in the left-right direction above the car 1.
In the vertical gap between the car 1 and the upper beam 4, there is provided a sheave support beam 5 that is inclined with respect to the upper beam 4 in the horizontal plane in the front / rear / left / right direction. The upper beam 4 is connected to the upper beam 4 so as to be in close contact with the lower surface of the longitudinal center portion of the upper beam 4.
A pair of left and right car-side sheaves 6L and 6R are rotatably supported at both left and right ends of the sheave support beam 5.

The traction sheave 7 disposed in the vicinity of the upper end portion of the left car guide rail 2L is rotationally driven by a driving device 8 about a rotation shaft extending in the front-rear direction.
The traction sheave 7 is wound with a hoisting rope 9 composed of, for example, a total of eight small-diameter ropes.
One end side of the hoisting rope 9 wound around the traction sheave 7 extends horizontally between a portion 9a extending downward from the traction sheave 7 toward the left car-side sheave 6L and a pair of left and right car-side sheaves 6L and 6R. And a portion 9c extending upward from the right car-side sheave 6R and fixed to the right hitch portion 10R, and the car 1 is suspended by 2: 1 roping.
Further, the other end side of the hoisting rope 9 wound around the traction sheave 7 has a portion 9d extending downward from the traction sheave 7 toward the weight-side sheave 11a rotatably supported on the counterweight 11, and a weight. The portion 9e extends upward from the side sheave 11a and is fixed to the left hitch portion 10L. The counterweight 11 is suspended by 2: 1 roping.

The details of the overall structure of such an elevator are described in Patent Document 1 below, for example.
Details of the structures of the hitch portions 10L and 10R are described in Patent Document 2 below, for example.

JP 2004-1904 A JP 2000-86114 A

Incidentally, in the conventional elevator described above, the upper end of the portion 9c of the hoisting rope 9 extending upward from the right car sheave 6R is directly connected to the hitch portion 10R.
At this time, the pitch between the ropes of the hoisting rope 9 wound around the car-side sheave 6R is about 8 to 10 millimeters, whereas in the hitch portion 10R, due to the necessary dimensions of the shackle rod and the coil spring. The pitch between the ropes is about 40-50 mm.
For this reason, a portion 9c of the hoisting rope 9 that extends upward from the right car-side sheave 6R becomes wider toward the upper side.

Therefore, in the above-described conventional elevator, if the car 1 is raised near the ceiling of the hoistway in order to reduce the overhead dimension (the vertical dimension from the floor of the top floor to the hoistway ceiling), The angle of the end spread of the portion 9c extending upward from the right car-side sheave 6R of the upper rope 9 becomes larger.
As a result, the lateral inclination angle of the hoisting rope with respect to the rope groove of the right car-side sheave 6R increases, so that the rubbing between the rope groove and the hoisting rope increases and the noise inside the car 1 is increased. Or the life of the hoisting rope 9 is shortened.
Moreover, when the horizontal inclination angle of the hoisting rope with respect to the rope groove becomes too large, the hoisting rope may be detached from the rope groove.

  Therefore, an object of the present invention is to eliminate the above-mentioned problems of the prior art, and to a hitch portion provided at the top of the hoistway while keeping the portion extending upward from the car sheave of the hoisting rope in an aligned state. It is to provide a technology for guiding.

The present invention that solves the above-mentioned problems is directed to a hitch portion in which an end portion of the hoisting rope is provided at the top of the hoistway while maintaining an aligned portion of the hoisting rope of the elevator that extends upward from the car-side sheave. A device for guiding
A guide means disposed above the car-side sheave and having an outer peripheral surface that curves upwardly and has a portion extending upward from the car-side sheave;
A hitch portion disposed below the guide means for fixing an end portion of a portion of the hoisting rope that extends downward after being wound around the guide means.
The outer peripheral surface of the guide means may be a curved surface that is convex upward, and can be, for example, an outer peripheral surface of a cylinder or an outer peripheral surface of an elliptic cylinder. I just need it.
Further, the radius of the outer peripheral surface of the guide means is specifically about 40 times the wire diameter of the rope so as to satisfy the safety standard applied to the elevator with respect to the wire diameter of the rope constituting the hoisting rope. Set to.

That is, in the elevator hoisting rope guide device of the present invention, the portion of the elevator hoisting rope that extends upward from the car-side sheave is not directly fixed to the hitch part but on the outer peripheral surface of the guiding means. The direction of travel is reversed by being wound around the wire, and after extending downward, it is fixed to the hitch portion.
As a result, the portion of the hoisting rope that extends between the car-side sheave and the guide means is in the same alignment state as that of the portion that is wound around the car-side sheave, that is, is parallel to each other and maintains a predetermined pitch between the ropes. Can be kept in a state.
On the other hand, the portion of the hoisting rope that extends between the guide means and the hitch portion becomes divergent downward, but the angle of the divergent extent is reduced by arranging the hitch portion sufficiently downward. Can do.
Furthermore, since the guide means rotates at a minute angle corresponding to the amount of expansion and contraction of the coil spring provided in the hitch part, and only moves up and down or tilts, the guide means and the hitch part of the hoisting rope There is no rubbing sound due to friction between the portion extending between the guide means and the guide means, and the life of the portion is not reduced.

The guide means can be composed of a guide sheave similar to the car sheave.
At this time, the car-side sheave and the guide sheave have their rotation axes parallel to each other, and the hoisting rope extending from the rope groove of the car-side sheave is guided without being inclined in the lateral direction with respect to the rotation axes. Positioned to enter the rope groove of the sheave.
Note that the guide sheave need not be completely circular, but may be configured to be semicircular.

Further, the guide means can be formed of a semi-cylindrical or semi-elliptical column-shaped guide block having an outer peripheral surface curved in a convex shape upward.
At this time, a rope groove can be provided on the outer peripheral surface of the guide block, or a guide pin for positioning the hoisting rope in the direction of the axis of rotation of the car-side sheave can be provided.
Furthermore, a plurality of rollers are rotatably supported on the outer peripheral surface of the guide block, and when the hoisting rope moves in the longitudinal direction, these rollers rotate so that the hoisting rope moves smoothly. You can also guide.

Further, the guide block can be elastically supported by elastic means.
The elastic means can be formed by laminating rubber plates, or a coil spring can be used.
As a result, when the hoisting rope moves in the longitudinal direction by the action of the coil spring provided in the hitch portion, the guide block can follow up and down or tilt.

Furthermore, even if the coil spring that elastically supports the hoisting rope in the hitch portion is omitted, the hoisting rope can be elastically supported by the elastic means that elastically supports the guide block.
At this time, it is loaded on the hoisting rope by interposing a load detection means such as a load cell between the guide block and the elastic means, or between the support portion supporting the guide block and the elastic means. The load that is present can be detected.

After the hoisting rope extends upward from the car-side sheave, the guide means and the hitch portion are curvedly extended along the outer peripheral surface of the guide means, and the extending direction is reversed from the upper side to the lower side. By extending downward from the top to the hitch portion, it is arranged to extend in an inverted U shape when viewed from the front.
Further, a reinforcing member extending in the vertical direction is interposed between the support portion supporting the guide means and the hitch portion.
As a result, the force by which the hoisting rope pushes down the guide means and the force by which the hoisting rope lifts the hitch portion cancel each other, so that one guide that supports the guide means and the hitch portion. The bending moment applied to the rail can be reduced.

  According to the hoisting rope guide means of the present invention, the portion extending upward from the car-side sheave of the hoisting rope of the elevator can be maintained in the same alignment state as the portion wound around the car-side sheave. Generation of rubbing noise between the rope groove of the cage sheave and the hoisting rope and a decrease in the life of the hoisting rope can be prevented.

Hereinafter, with reference to FIG. 1 thru | or FIG. 9, each embodiment of the hoisting rope guide apparatus of the elevator which concerns on this invention is described in detail.
In the following description, the same reference numerals are used for the same parts including the prior art described above, and the direction in which the door of the car opens and closes is the left and right direction, and the direction in which the passenger enters and exits the car The direction and the vertical direction are called up and down directions.

1st Embodiment First, with reference to FIGS. 1-4, the hoisting rope guide apparatus of the elevator of 1st Embodiment is demonstrated in detail.

The elevator car 1 equipped with the hoisting rope guide device of the first embodiment is guided by a pair of left and right car-side guide rails 2L and 2R to move up and down in the hoistway.
A pair of left and right doors 3L and 3R provided on the front surface of the car 1 open and close in the left-right direction.
The car frame that supports the car 1 has an upper beam 4 that extends horizontally in the left-right direction above the car 1.
In the vertical gap between the car 1 and the upper beam 4, there is provided a sheave support beam 5 that is inclined with respect to the upper beam 4 in the horizontal plane in the front / rear / left / right direction. The upper beam 4 is connected to the upper beam 4 so as to be in close contact with the lower surface of the longitudinal center portion of the upper beam 4.
A pair of left and right car-side sheaves 6L and 6R are rotatably supported at both left and right ends of the sheave support beam 5.

Guide means 20 is disposed in the vicinity of the upper end portion of the right car side guide rail 2R.
The guide means 20 is configured to rotatably support a guide sheave 21 having the same shape and the same dimensions as the right car-side sheave 6R on a gantry.
The gantry includes a back plate 22 fixed to the back surface of the right car-side guide rail 2 </ b> R and a horizontal plate 23 fixed to the front end of the back plate 22.
The guide sheave 21 is rotatably supported by a rotation shaft 24 supported on the horizontal plate 23 via a bracket.

  At this time, as shown in FIGS. 3 and 4, the right car-side sheave 6R and the guide sheave 21 have their rotation axes parallel to each other and extend upward from the rope groove of the right-side car-side sheave 6R. The hoisting ropes are positioned so as to enter the rope grooves of the guide sheave 21 without being inclined in the transverse direction with respect to their rotational axes.

A hitch portion 30 is fixed to a portion of the right car side guide rail 2R below the guide means 20.
The hitch portion 30 includes a horizontal plate 31 supported by the right car guide rail 2R, a shackle rod 32 to which an end of the hoisting rope is connected, and a coil spring 33 for elastically supporting the hoisting rope. Have.

Further, the front end of the horizontal plate 31 of the hitch portion 30 and the front end of the horizontal plate 23 on the guide sheave 21 side are connected by a reinforcing plate 25 extending in the vertical direction.
Accordingly, the downward load applied to the guide sheave 21 from the hoisting rope and the upward load applied to the hitch portion 30 from the hoisting rope cancel each other, and thus the guide supported in a cantilever shape. In addition to preventing the sheave 21 from tilting, the bending moment acting on the right car-side guide rail 2R can be reduced.

The traction sheave 7 disposed in the vicinity of the upper end portion of the left-side car-side guide rail 2L is rotationally driven by a drive device 8 about a rotational axis extending in the front-rear direction.
The traction sheave 7 is wound with, for example, a total of eight hoisting ropes 40 made of a small diameter rope having a wire diameter of 5 mm, for example.

One end side of the hoisting rope 40 wound around the traction sheave 7 is horizontally between a portion 40a extending downward from the traction sheave 40 toward the left car-side sheave 6L and a pair of left and right car-side sheaves 6L and 6R. An extended portion 40b (FIG. 3), a portion 40c extending upward from the right car-side sheave 6R to the guide sheave 21, and a portion 40d extending downward from the guide sheave 21 and fixed to the hitch portion 30 The car 1 is suspended by 2: 1 roping.
That is, the hoisting rope 40 extends in an inverted U shape from the right car-side sheave 6R to the hitch portion 30 through the guide sheave 21 when viewed from the front as shown in FIG.

Further, the other end side of the hoisting rope 40 wound around the traction sheave 7 is a portion 40d that extends downward from the traction sheave 7 toward the weight-side sheave 11a that is rotatably supported by the upper portion of the counterweight 11. The portion 40e extends upward after being wound around the weight-side sheave 11a and is fixed to the left hitch portion 10L. The counterweight 11 is suspended by 2: 1 roping.
The counterweight 11 is guided by a pair of front and rear weight side guide rails 11 f and 11 r (FIG. 3) and moves up and down below the driving device 8.

That is, the elevator hoisting rope guide device 100 according to the first embodiment includes the guide means 20 and the hitch portion 30.
A portion 40c of the hoisting rope 40 that extends upward from the right car sheave 6R is wound on the outer peripheral surface of the guide sheave 21 so that its traveling direction is reversed up and down, and the hitch portion extends downward. 30 is fixed.
Thus, the portion of the hoisting rope 40 that extends between the right car-side sheave 6R and the guide sheave 21 is in the same alignment state as that of the portion that is wound around the car-side sheave 6R, that is, between the predetermined ropes that are parallel to each other. The pitch can be maintained.

On the other hand, the portion 40d extending between the guide sheave 21 and the hitch portion 30 of the hoisting rope 40 becomes divergent downward. However, by arranging the hitch portion 30 sufficiently downward, the diverging extent is reduced. The angle can be reduced.
Further, since the guide sheave 21 only rotates at a slight angle corresponding to the amount of expansion and contraction of the coil spring 33 provided in the hitch portion 30, the guide sheave 21 and the hitch portion 30 of the hoisting rope 40 are There is no rubbing noise caused by friction between the portion 40d extending between and the rope groove of the guide sheave 21, and the life of the hoisting rope 40 is not reduced at this portion 40e.

2nd Embodiment Next, with reference to FIG. 5, the hoisting rope guide apparatus 110 of 2nd Embodiment is demonstrated.

The guide means 50 in the hoisting rope guide device 110 of the second embodiment is composed of a semi-cylindrical guide block 51 having an outer peripheral surface that is convexly curved upward.
The guide block 51 is a semi-cylindrical metal member having the same outer diameter as the right car-side sheave 6R and a larger axial dimension.

An elastic means formed by laminating a plurality of rubber plates 52 is interposed between the lower surface of the guide block 51 and the horizontal plate 23 of the gantry.
Thus, the guide block 51 can follow the longitudinal movement of the hoisting rope 40 according to the expansion and contraction of the coil spring 33 provided in the hitch portion 30 by its vertical movement and tilting.
At this time, the guide block 51 only moves up and down or tilts at a slight angle corresponding to the amount of expansion and contraction of the coil spring 33 provided in the hitch portion 30. There is no rubbing sound due to friction between the portion 40d extending between the hitch portion 30 and the outer peripheral surface of the guide block 51, and the life of the portion 40d is not reduced.

3rd Embodiment Next, with reference to FIG. 6, the hoisting rope guide apparatus 120 of 3rd Embodiment is demonstrated.

  The hoisting rope guide device 120 of the third embodiment is different from the hoisting rope guide device 110 of the second embodiment described above in that the elastic means formed by laminating a plurality of rubber plates 52 and the horizontal plate 23 of the gantry. The difference is that a load cell (load detection means) 53 is interposed between them and the coil spring 33 is removed from the hitch portion 30.

That is, according to the hoisting rope guide device 120 of the third embodiment, the weight of the car 1 is detected by the load cell 53, and the control plate CP (FIG. 3) operates the drive device 8 based on the detection result. Can be controlled.
Further, the hoisting rope 40 can be elastically supported in the same manner as the coil spring 33 in the hitch portion 30 by elastic means formed by laminating a plurality of rubber plates 52.
Note that it is preferable to increase the elastic coefficient of the rubber plate 52 in accordance with the removal of the coil spring 33 from the hitch portion 30.

4th Embodiment Next, with reference to FIG. 7, the hoisting rope guide apparatus 130 of 4th Embodiment is demonstrated.

  In the hoisting rope guide device 130 of the fourth embodiment, the elastic means that elastically supports the guide block 51 is composed of a plurality of coil springs 54 with respect to the hoisting rope guide device 120 of the third embodiment described above. Is different.

  That is, in the hoisting rope guide device 130 of the fourth embodiment, the guide block 51 can be supported by the elastic means formed from the plurality of coil springs 54 so as to be movable up and down and tilted, and the hitch portion. The hoisting rope 40 can be elastically supported in the same manner as the coil spring 33 at 30.

5th Embodiment Next, with reference to FIG. 8, the hoisting rope guide apparatus 140 of 5th Embodiment is demonstrated.

  The hoisting rope guide device 140 of the fifth embodiment is an elastic means between the guide block 61 of the guiding means 60 and the horizontal plate 23 of the gantry with respect to the hoisting rope guide device 110 of the second embodiment described above. Is different in that a plurality of rollers are rotatably embedded in the outer peripheral surface of the guide block 61.

That is, in the hoisting rope guide device 140 of the fifth embodiment, the outer circumferential surface of the guide block 61 is provided with concave grooves having a semicircular cross-sectional shape, and a cylindrical shape is formed inside these concave grooves. Each of the rollers is rotatably accommodated, and a hoisting rope 40 is wound around these rollers.
Accordingly, when the hoisting rope moves in the longitudinal direction in accordance with the expansion and contraction of the coil spring 33 provided in the hitch portion 30, each roller rotates smoothly.
Therefore, if no rubbing noise is generated due to friction between the portion 40d of the hoisting rope 40 extending between the guide block 61 and the hitch portion 30 and the outer peripheral surface of the guide block 61, the life of the portion 40d is reduced. There is nothing.

6th Embodiment Next, with reference to FIG. 9, the hoisting rope guide apparatus 150 of 6th Embodiment is demonstrated.

  The hoisting rope guide device 150 of the sixth embodiment is based on a semi-cylindrical guide block 71 in which a guide means 70 is rotatably supported with respect to the hoisting rope guide device 100 of the first embodiment described above. The difference is that the rope groove is not provided in the outer peripheral surface of the guide block 71 and the hoisting rope is guided by the guide pin.

That is, in the hoisting rope guide device 150 of the sixth embodiment, the semi-cylindrical guide block 71 includes a bracket 72 fixed on the horizontal plate 23 of the gantry, the horizontal rotation shaft 73, and a pair of left and right turns. The movement restricting stopper 74 is supported so that it can be rotated within a predetermined rotation range.
In addition, no rope groove is provided in the outer peripheral surface of the guide block 71, and a plurality of guide pins 75 are planted in the circumferential direction at the front end portion and the rear end portion of the outer peripheral surface. .
As a result, the entire hoisting rope 40 wound around the outer peripheral surface of the guide block 71 is sandwiched in the front-rear direction by these guide pins. A portion 40e extending between 6R and the guide block 71 can be maintained in an aligned state.
The position of the rotation restricting stopper 74 is determined so as not to prevent the hoisting rope 40 from moving in the longitudinal direction in accordance with the expansion and contraction of the coil spring 33 provided in the hitch portion 30. .

As mentioned above, although each embodiment of the hoisting rope guide apparatus of the elevator which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.
For example, the guide block 51 in the second embodiment described above or the guide block 71 in the sixth embodiment described above is formed in a semi-cylindrical shape, but may be formed in a semi-elliptical column shape.

The perspective view which shows the elevator which has the hoisting rope guide apparatus of 1st Embodiment. The principal part expansion perspective view of the elevator shown in FIG. The top view of the elevator shown in FIG. The principal part front view of the elevator shown in FIG. The principal part enlarged front view of the hoisting rope guide apparatus of 2nd Embodiment. The principal part enlarged front view of the hoisting rope guide apparatus of 3rd Embodiment. The principal part enlarged front view of the hoisting rope guide apparatus of 4th Embodiment. The principal part enlarged front view of the hoisting rope guide apparatus of 5th Embodiment. The principal part enlarged front view of the hoisting rope guide apparatus of 6th Embodiment. The perspective view which shows the conventional elevator.

Explanation of symbols

CP control panel 1 Car 2L, 2R Car side guide rail
3L, 3R Door 4 Upper beam 5 Sheave support beam 6L, 6R Car side sheave 7 Traction sheave 8 Drive device 9 Hoisting rope 10L, 10R Hitch part 11 Balance weight 11a Weight side sheave 20 Guide means 21 Guide sheave 25 Reinforcement plate 30 Hitch part 31 Horizontal plate 32 Shackle rod 33 Coil spring 40 Hoisting rope 50 Guide means 51 Guide block 52 Rubber plate 53 Load cell (load detection means)
54 Coil Spring 60 Guide Means 61 Guide Block 70 Guide Means 71 Guide Block 73 Horizontal Rotating Shaft 74 Rotation Restricting Stopper 75 Guide Pin 100 Hoisting Rope Guide Device 110 of the First Embodiment 110 Hoisting Rope Guide Device of the Second Embodiment 120 Hoisting rope guide device 130 according to the third embodiment Hoisting rope guide device 140 according to the fourth embodiment 140 Hoisting rope guide device 150 according to the fifth embodiment Hoisting rope guide device 150 according to the sixth embodiment

Claims (11)

A device that guides an end of the hoisting rope to a hitch portion provided at the top of a hoistway while maintaining an upwardly extending portion of the hoisting rope of the elevator in an aligned state. A guide means disposed above the car sheave, having an at least a semi-cylindrical outer circumferential surface convex upward, on which a portion extending upward from the side sheave is wound;
A hitch portion disposed below the guide means for fixing an end portion of the hoisting rope that extends downward after being wound around the guide means;
An elevator hoisting rope guide device.   The elevator hoisting rope guide device according to claim 1, wherein the guide means is constituted by a sheave supported rotatably.   The elevator hoisting rope guide device according to claim 1, wherein the guide means includes a semi-cylindrical guide block having an outer peripheral surface curved in a convex shape upward.   The elevator hoisting rope guide device according to claim 3, wherein the guide block is elastically supported by an elastic support means so as to be movable up and down or tilted.   The elevator hoisting rope guide device according to claim 3, wherein the guide block is rotatably supported by a horizontal rotation shaft.   The elevator winding according to claim 4 or 5, wherein a load detection means for detecting a load applied to the guide block from the hoisting rope is arranged in parallel in the guide block. Upper rope guide device.   A plurality of rollers that rotate with the movement of the hoisting rope wound around the guide block on the outer peripheral surface of the guide block are rotatably supported. Item 7. An elevator hoisting rope guide device according to any one of Items 3, 4, and 6.   The plurality of guide pins for positioning the hoisting rope in the direction of the rotation axis of the car-side sheave project from the outer peripheral surface of the guide block. The elevator hoisting rope guide device described in 1.   The guide means and the hitch portion extend in a curved manner along the outer peripheral surface of the guide means after the hoisting rope extends upward from the car-side sheave, and the extending direction reverses from above to below. The elevator winding according to claim 1, wherein the elevator winding is arranged so as to extend in an inverted U shape when viewed from the front by extending downward from the guide means to the hitch portion. Upper rope guide device. A car and a counterweight that are guided by guide rails and are respectively raised and lowered in the hoistway;
A traction sheave that is rotationally driven by a drive device;
A hoisting rope wound around the traction sheave and having one end thereof suspends the car via a car-side sheave and the other end suspends the counterweight;
A portion extending upward from the car-side sheave of the hoisting rope has an outer peripheral surface that is convex toward the upper side and is guided upward so as to extend downward, and is convex upward. Guiding means disposed above the car-side sheave;
A hitch portion disposed below the guide means for fixing an end portion of the hoisting rope that extends downward after being wound around the guide means;
An elevator characterized by comprising: The guide means and the hitch portion are supported by one of the guide rails,
11. The elevator according to claim 10, wherein a reinforcing member is interposed between the support portion supporting the guide means and the hitch portion in the vertical direction.

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