JP6682039B2 - Main rope steady rest device for elevator - Google Patents

Description

  The present invention relates to a main rope steady rest device for an elevator, which suppresses swing of a main rope of an elevator.

  The elevator car is guided by a guide rail fixed to the hoistway, and hoists in the hoistway by a main rope. In an elevator with such a structure, when the hoistway sways due to an earthquake or wind pressure, the main rope resonates and shakes significantly, which may cause the car to come into contact with various equipment in the hoistway, which causes obstacles to elevator operation. .

  Patent Documents 1 and 2 describe a steady rest that surrounds the main rope in the middle of the hoistway.

JP, 2014-227291, A JP-A-7-179279

  However, in the steady rests described in Patent Documents 1 and 2, a sensor for detecting passage of an elevator and canceling the steady rest, or a power for driving the steady rest is separately required. As a result, there is a problem that the manufacturing cost of the elevator increases.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a main rope steady rest device for an elevator, which has a simple structure and suppresses the main rope runout.

  The main rope steady rest device for an elevator according to the present invention is used in an elevator having a main rope, one of which is fixed to a lifting body that is vertically movable in a hoistway and the other of which is fixed to a counterweight. A steady rest having a stop member and a tension applying portion for applying a tension to the steady rest, the tension applying portion being provided at the bottom of the hoistway, and the steady rest being arranged around the main rope. , One end is fixed to the top of the hoistway, the other end is fixed to the tension applying part, contacts the elevating body between the one end and the other end, and the steady rest is the top of the hoistway and the elevating body It is provided between the upper part of and.

  According to the present invention, it is possible to provide a main rope steady rest device for an elevator that suppresses the main rope from swinging with a simple configuration.

FIG. 3 is a plan view of the elevator main rope steady rest of the first embodiment. It is a side view of the main rope steady rest device for an elevator of Embodiment 1. It is a figure explaining the steady rest weight in FIG. It is a figure explaining the effect of the main rope steady rest device for elevators of Embodiment 1. It is a figure explaining the effect of the main rope steady rest device for elevators of Embodiment 1. It is a top view of the main rope steady rest device for elevators of Embodiment 2. It is a top view of the main rope steady rest device for elevators of Embodiment 3. It is a side view of the main rope steady rest device for elevators of Embodiment 3. It is a figure explaining calculation of the position of the main rope steady rest for elevators of Embodiment 3. It is a top view of the main rope steady rest device for elevators of Embodiment 4. It is a figure which shows the modification of the tension | tensile_strength provision part in Embodiment 1 to 4.

  Embodiments of a main rope steady rest device for an elevator according to the present invention will be described below with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and duplicate description will be omitted.

Embodiment 1.
1 is a plan view of an elevator main rope steady rest device according to a first embodiment of the present invention. FIG. 2 is a side view of the elevator main rope steady rest, and FIG. 3 is a diagram illustrating a weight used in the elevator main rope steady rest.

  As shown in FIGS. 1 and 2, one of the three main ropes 4 is fixed to a car 2 that is provided in a hoistway 1 so as to be able to move up and down. The other of the main ropes 4 is fixed to the counterweight 3.

  Four steady rest ropes 10 are provided around the main rope 4. Each of the steady rest ropes 10 is fixed at one end to a rope stop 11 provided at the top 7 of the hoistway 1, and at the other end thereof at the bottom rest 9 of the hoistway 1 by a steady rest 13 respectively. It is fixed to. The steady rest weight 13 applies downward tension to the steady rest rope 10. The steady rest rope 10 is in contact with a car pulley 12 provided on the side surface of the car 2 between the rope stop 11 and the steady rest weight 13. The car 2 and the car pulley 12 form an elevating body. The steady rest rope 10 constitutes a steady rest member.

  When viewed from above the car 2, each of the four steady rest ropes 10 extends from the rope stop 11 toward a steady rest weight 13 in a diagonal direction, and intersects around the main rope 4. Further, the four steady rest ropes 10 surround the main rope 4 when viewed from above the car 2 at a position between the top 7 of the hoistway 1 and the upper portion 8 of the car 2. The steady rest 20 is composed of four steady rest ropes 10.

  As shown in FIG. 3, the steady weight 13 has a cylindrical hole 14 formed in the lower portion. A shaft 15 provided in the bottom portion 9 of the hoistway 1 is inserted into the hole 14. The hole 14 and the shaft 15 restrain the horizontal movement of the steady rest 13 while smoothing the vertical movement thereof. The steady rest 13, the hole 14, and the shaft 15 form a tension applying portion.

Next, the effect of the elevator main rope steady rest device according to the first embodiment will be described with reference to the conventional elevator devices shown in FIGS. 4 and 5.
FIG. 4 is a plan view of the conventional elevator apparatus, and FIG. 5 is a side view of the conventional elevator apparatus, showing a swing of the main rope due to vibration or the like.

  As shown in FIG. 4, the conventional elevator apparatus is not provided with the elevator main rope steady rest apparatus of the first embodiment, and the car 2 is guided by the guide rails 6 and the main rope 4 is fixed. Only there.

  In such a conventional elevator apparatus, when the hoistway 1 shakes due to an earthquake or wind pressure, the main ropes 4 resonate and shake greatly, and the three main ropes 4 become disjoint as shown in FIG. There is also. When the main rope 4 swings in this way, the car 2 may come into contact with various devices in the hoistway 1, which hinders the traveling of the car 2.

  A downward tension is constantly applied to the four steady rest ropes 10 by the steady rest weight 13. Therefore, depending on whether the car 2 is near the top 7 of the hoistway 1 or near the bottom 9 of the hoistway 1, the path of the steady rest rope 10 changes, and the height of the steady rest weight 13 varies. . However, due to the hole 14 and the shaft 15, the steady rest weight 13 moves only in the vertical direction and does not move in the horizontal direction. As a result, the four steady rest ropes 10 always surround the main rope 4 as viewed from above the car 2 near the middle of the top 7 of the hoistway 1 and the upper portion 8 of the car 2, and the steady rest part Make up 20.

On the other hand, when a large deflection occurs in the main rope 4, as shown in FIG. 5, the main rope 4 has one maximum value at about half the position from the top 7 of the hoistway 1 to the upper portion 8 of the car 2. It has a waveform. That is, the main rope 4 has an amplitude antinode near the middle between the top 7 of the hoistway 1 and the upper portion 8 of the car 2.
As a result, when a large shake occurs in the main rope 4, the shake preventive portion 20 is always located at a position where the amplitude becomes maximum, so that the shake of the main rope 4 can be effectively suppressed.

  As described above, the elevator main rope steady rest according to Embodiment 1 has the steady rest 20 including the four steady ropes 10 and the steady weight 13 that applies tension to the steady rope 10. . The steady rest weight 13 is provided on the bottom portion 9 of the hoistway 1, the steady rest rope 10 is arranged around the main rope 4, one end thereof is fixed to the top portion 7 of the hoistway 1, and the other end portion thereof is It is fixed to the steady rest 13 and comes into contact with the car 2 via the car pulley 12 between one end and the other end, and the steady rest 20 is provided between the top 7 of the hoistway 1 and the upper part 8 of the car 2. It is provided in. The steady rest 20 is composed of the four steady rest ropes 10, and the four steady rest ropes 10 intersect around the main rope 4 as viewed from above the car 2 and surround the main rope 4. are doing.

  Accordingly, it is possible to provide a main rope steadying device for an elevator that suppresses the main rope from swinging with a simple configuration.

  In addition, in the elevator main rope steady rest of the first embodiment, the steady rest 20 automatically moves so as to have a height near the middle between the top 7 of the hoistway 1 and the upper portion 8 of the car 2. . Therefore, a sensor for detecting passage of the elevator and releasing the steady rest, or a power for driving the steady rest is unnecessary.

  Moreover, in the elevator main rope steady rest of the first embodiment, the car 2 does not come into contact with the steady rest 20. Further, since the plurality of steady rests do not come into contact with each other, no shock or noise is generated when the car comes into contact with the steady rests or the steady rests do not cause passenger discomfort. Also, no shock absorbing material is required to prevent shock or noise.

  Further, since the elevator main rope steady rest of the first embodiment is not interlocked with the earthquake detector, it operates without delay regardless of the distance from the epicenter. In addition, since the structure of the steady rest 20 does not change depending on the length of the up-and-down stroke, the number, length and volume of members related to the steady rest 20 do not change. Further, there is no delay in the operation time due to the increase in the number, length and volume of the members.

Embodiment 2.
Next, an elevator main rope steady rest device according to a second embodiment will be described with reference to FIG. In the second embodiment, the number of steady rest ropes is small.

FIG. 6 is a plan view of the elevator main rope steady rest of the second embodiment.
As shown in FIG. 6, in the elevator main rope steady rest device, two steady rest ropes 10 are provided and are arranged diagonally when viewed from above the car 2. Further, the two steady rest ropes 10 intersect with each other on the left side of the main rope 4 when viewed from above the car 2, and are V-shaped. The steady rest 21 is composed of two steady rest ropes 10 between the top 7 of the hoistway 1 and the upper portion 8 of the car 2.

  As described above, in the elevator main rope steady rest according to the second embodiment, the swing of the main rope 4 can be easily suppressed with a simpler structure. That is, the large swing of the main rope 4 can be largely suppressed by preventing the swing to one side in the left-right direction (180 degrees out of 360 degrees), as compared with the case where the steady rest 21 is not provided.

Embodiment 3.
Next, a main rope steady rest device for an elevator according to a third embodiment will be described with reference to FIGS. 7 to 9. In the third embodiment, a steady rest is provided.

  FIG. 7 is a plan view of the elevator main rope steady rest of the third embodiment, FIG. 8 is a side view of the elevator main rope steady rest, and FIG. 9 is a formula for calculating the position of the main rope steady rest. It is a figure explaining about.

  As shown in FIGS. 7 and 8, a steady rest 16 is provided above the car 2. The steady rest 16 has a shape surrounding the main rope 4 when viewed from above the car 2. The main rope 4 penetrates the steady rest 16.

  The steady rest 16 is provided with steady rest pulleys 17 on both left and right sides. The steady rope 10 is in contact with the steady rest pulley 17 on the side of the steady rest 16 so as to pass vertically and smoothly. The steady rest pulley 17 is located closer to the center of the hoistway 1 than the rope stop 11 and the car pulley 12, that is, closer to the steady rest 16.

  Further, the steady rest rope 10 is fixed to a rope stop 11 provided on the top 7 of the hoistway 1 and is in contact with the steady rest pulley 17. Further, the steady rest rope 10 is located just below the rope restraint 11, contacts the car pulley 12 provided on the side surface of the car 2, and is fixed to the steady rest weight 13 provided at the bottom portion 9 of the hoistway 1. ing. Thereby, the steady rest pulley 17 squeezes the steady rest rope 10 toward the steady rest 16.

The position of the steady rest 16 will be described below with reference to FIG. 9.
When the steady rest 16 does not move in the vertical direction, by the symbols shown in FIG. 9, the equation of the balance of the forces acting on the steady rest 16 (1), the relational expression of the vertical pulling force (2) and (3) and the relational expression (4) of the distance are satisfied.
2 × F1 = 2 × F2 + W (1)
F1 = T × L2 / √ (L2 ^ 2 + d1 ^ 2) ... (2)
F2 = T × L3 / √ (L3 ^ 2 + d1 ^ 2) ... (3)
L3 = L1-L2 (4)

In the above equations (1) to (4),
F1 is the vertical component of the tensile force that the rope stop 11 acts on the steady rest 16,
F2 is the vertical component of the tensile force on which the steady weight 13 acts on the steady rest 16,
W is the gravity of the steady rest 16,
T is a tensile force that the steady rest 16 acts on the rope stop 11 or the steady rest weight 13,
L1 is the vertical distance from the line 11 to the upper part 8 of the car 2,
L2 is the vertical distance from the rope stop 11 to the steady rest 16,
L3 is the vertical distance from the steady rest 16 to the top 8 of the car 2,
d1 is the horizontal distance from the steady rest pulley 17 to the rope stop 11 or from the steady rest pulley 17 to the car pulley 12,
Respectively.

  If the gravity W of the steady rest 16 is sufficiently smaller than the tensile force T using the equations (1) to (4), the length L2 becomes approximately L1 / 2. Therefore, when the car 2 is traveling in the up-down direction, the steady rest 16 is always located near the middle between the top 7 of the hoistway 1 and the upper part 8 of the car 2, and as the car 2 travels. Move up and down.

  Thus, in the elevator main rope steady rest according to the third embodiment, the steady rest 16 surrounds the main rope 4 when viewed from above the car 2. As a result, the steady rest 16 comes into contact with the main rope 4 and repels it, so that the steady runout can be suppressed.

  In the third embodiment, the steady rest 16 is made of metal, but is not limited to a metallic material as long as it is a member that does not easily deform.

Fourth Embodiment
Next, an elevator main rope steady rest according to Embodiment 4 will be described with reference to FIG. In the fourth embodiment, the shape of the steady rest is different from that of the third embodiment.

FIG. 10 is a plan view of the elevator main rope steady rest of the fourth embodiment.
As shown in FIG. 10, a steady rest 26 is provided above the car 2. The steady rest 26 has a shape surrounding the main rope 4 when viewed from above the car 2. The main rope 4 penetrates the steady rest 26.

  The steady rest 26 is provided with arms 22 extending on the left and right sides in the direction of the guide rail 6. The steady rest 26 includes a guide shoe 18 at the tip of the arm 22. The guide shoe 18 holds the guide rail 6 and guides the steady rest 26 along the guide rail 6.

  The steady rest 26 includes steady rest pulleys 17 on both left and right sides of the steady rest 26. The steady rest rope 10 is in contact with the steady rest pulley 17 on the side of the steady rest 26 so as to pass vertically and smoothly.

  The steady rest rope 10 is fixed to a rope stop 11 provided at the top 7 of the hoistway 1, extends downward in the hoistway 1, contacts the steady rest pulley 17, and is almost directly below the rope stop 11, It is in contact with a car pulley 12 provided on a side surface of the car 2 and is fixed to a steady rest weight 13 provided on a bottom portion 9 of the hoistway 1.

  As described above, in the elevator main rope steady rest according to the fourth embodiment, the steady rest 26 includes the guide shoe 18 and moves along the guide rail 6 that guides the car 2.

As a result, the steady rest 26 is firmly held by the guide rail 6 via the guide shoe 18 instead of the tension of the steady rest rope 10. That is, the steady rest 26 is restrained from moving in the horizontal direction by the guide rail 6. Therefore, even if the main ropes 4 collectively come into contact with the steady rest 26, the steady rest 26 does not swing together with the main rope 4, so that the swing of the main rope 4 can be suppressed.

  In addition, in Embodiments 1 to 4, the steady weight 13 is used as the tension applying portion, but an elastic body 19 may be used as shown in FIG. The elastic body 19 is, for example, a spring, one of which is fixed to the tip of the steady rest rope 10 and the other of which is fixed to the bottom portion 9 of the hoistway 1. Accordingly, the tension applying portion can be configured with a simpler member. Further, the elastic body 19 may be inserted into a cylindrical case fixed to the bottom portion 9. This can prevent the elastic body 19 from swinging in the horizontal direction.

  1 hoistway, 2 car (elevator), 3 counterweights, 4 main ropes, 6 guide rails, 7 top, 8 top, 9 bottom, 10 steady rest rope (rest rest member), 12 car pulley (elevator) , 13 steady rest weight (tension applying part), 14 holes (tension applying part), 15 shaft (tension applying part), 16, 26 steady rest, 18 guide shoe, 19 elastic body (tension applying part), 20, 21 Steady rest.

Claims (5)

A main rope steadying device for an elevator used in an elevator having a main rope, one of which is fixed to a lifting body that is vertically movable in a hoistway, and the other of which is fixed to a counterweight,
A steadying portion having a steadying member, and a tension applying portion for applying a tension to the steadying member,
The tension applying section is provided at the bottom of the hoistway,
The steady rest of the steady rest is arranged around the main rope, one end is fixed to the top of the hoistway, the other end is fixed to the tension applying part, Contact the lifting body between the end,
A main rope steady rest device for an elevator, wherein the steady rest is provided between a top of the hoistway and an upper portion of the lifting body. The steady rest includes four steady rests,
The main rope steady rest device for an elevator according to claim 1, wherein the steady rest crosses around the main rope and surrounds the main rope when viewed from above the lifting body. The steady rest includes two steady rests,
The main rope steady rest device according to claim 1, wherein the steady rest members intersect with each other around the main rope to form a V-shape when viewed from above the elevator body. The steady rest further includes a steady rest,
The elevator main rope steadying device according to claim 1, wherein the steady rest surrounds the main rope when viewed from above the lifting body. The steady rest includes a guide shoe,
The main rope steady rest device for an elevator according to claim 4, wherein the steady rest moves along a guide rail that guides the lifting body via the guide shoe.

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