JP5672103B2 - Elevator equipment - Google Patents

Description

The present invention relates to an elevator apparatus having an elevator tension device for applying a constant tension to a tension wheel that holds a governor rope that engages with a car.

In a conventional elevator, a part of an endless governor rope is connected to a car that moves up and down a hoistway. Further, the upper loop portion of the endless governor rope is wound around the governor provided near the top of the hoistway, while the lower loop portion is wound around a tension wheel provided at the hoistway bottom.

If the governor rope that engages with the cage during car braking, or particularly if the governor rope violates due to shaking of a high-rise building, the length of the governor rope increases and the weight of the governor rope increases. Accordingly, it is necessary to increase the additional tension, that is, increase the weight of the tension wheel.
Therefore, the governor rope tension device provided at the bottom of the hoistway is composed of a tension wheel wound around the lower loop portion of the governor rope, a tension wheel support body that rotatably supports the shaft of the tension wheel, and the vicinity of the tension wheel One end of the guide rail is fixed to the upper and lower guide rails and extends in the direction in which the tensioning wheel is located, and has a pair of supports that rotate with the tensioning wheel support. A weight is provided at one end of the pair of supports, and necessary tension is applied to the governor rope through a tensioning wheel (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-7339 (second page, column 0011 and FIG. 2)

However, when the mass of the tensioner is increased by the weight, the total height of the hoistway is increased, and when the length of the governor rope is increased, the weight corresponding to the necessary weight added to the tensioner increases accordingly. There has been a problem that it has increased and is difficult to carry to the site and handle at the time of installation.
In addition, since the weight is attached via the support body in the horizontal direction of the tensioned vehicle, when the governor rope is rampant, the tensioned vehicle has a large moment and the tensioned vehicle becomes unstable.

  The present invention has been made to solve the above-described problems, and includes a tension wire provided with a weight pulley on a side surface of a tensioned vehicle, one end attached to a hoistway bottom and the other end attached to a weight. The purpose is to reduce the mass of the weight necessary for winding the pulley to a fraction of the mass required for the tensioning wheel. Moreover, it aims at improving workability | operativity of a maintenance worker by restraining the mass of a required weight to a fraction of the mass required for a tension vehicle.

An elevator apparatus according to the present invention is a governor rope that is provided in a hoistway and is supported in the vicinity of the top of the hoistway as to raise and lower the hoistway, and is below the endless governor rope that circulates with the raising and lowering of the car A tension wheel with a loop portion wrapped around it and a first shaft that supports the rotation of the tension wheel to cover the side surface of the tension wheel, and is fixed to a guide rail that guides the raising and lowering of the car and extends up and down. a movable tension pulley holder up and down with the tension wheel along the vehicle rail, provided on a first axis of the tension pulley, the first pulley movable up and down with the tension sheave along the tension pulley rail, A tension wire is wound around the first pulley from above and has one end attached to the bottom of the hoistway and a tension wire that applies a load to the tensioned vehicle by a weight suspended from the other end.

According to the elevator apparatus according to the present invention, a tension corresponding to several times the mass of the weight can be applied to the tension wheel, and thus to the governor rope, and the necessary weight is equal to the number of mass necessary for the tension wheel. The cost can be reduced to 1. Further, since the mass of the necessary weight is suppressed to a fraction of the mass necessary for the tensioned vehicle, there is an effect that the workability of the maintenance staff is improved.

1 is an overall configuration diagram of an elevator apparatus according to Embodiment 1 of the present invention. It is the principal part top view and the principal part side view of the elevator tension vehicle apparatus in the elevator apparatus by Embodiment 1 of this invention. It is another principal part top view of the tension vehicle apparatus for elevators in the elevator apparatus by Embodiment 1 of this invention. It is another principal part top view and principal part side view of the elevator tension vehicle apparatus in the elevator apparatus by Embodiment 1 of this invention. It is the principal part top view and the principal part side view of the elevator tension vehicle apparatus in the elevator apparatus by Embodiment 2 of this invention.

Embodiment 1 FIG.
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  The elevator apparatus according to the first embodiment will be described. First, the configuration of the elevator apparatus will be described.

FIG. 1 is an overall configuration diagram of an elevator apparatus in which an elevator tension vehicle apparatus in an elevator apparatus according to Embodiment 1 of the present invention is installed.
In FIG. 1, a hoisting machine 17 for driving an elevator car 7 moving up and down is installed in a hoistway 1 provided in a building. A car 7 and a counterweight 6 are wound around the hoisting machine 17 via the main rope 5, and the car 7 and the counterweight 6 move up and down relatively as the hoisting machine 17 is driven. At this time, the car 7 ascends and descends along the guide rail 3 that extends in the vertical direction of the hoistway 1 and guides the ascent and descent of the car 7.
On the other hand, a lower loop portion of the endless governor rope 4 is wound around a governor 8 installed near the top of the hoistway 1 to detect an abnormal speed of the car 7 and a tensioner 11 installed just below the governor 8. It has been applied. Further, a part of the governor rope 4 is connected to the car 7 via the link mechanism 18, and when the car 7 moves up and down, the governor rope 4 circulates accordingly.

  Further, the tension wheel 11 on which the lower loop portion of the endless governor rope 4 is wound is used to apply a necessary tension to the governor rope 4 so that the rotational speed of the governor 8 matches the moving speed of the car 7. Is. The governor rope 4 is detected when the governor rope 4 is shaken due to the shaking of the building, or when the governor 8 detects an abnormal speed of the car 7 and an emergency stop device (not shown) for stopping the car 7 is activated. In order for the tension wheel 11 to withstand the rampage of the governor rope 4 generated by the inertial force, it is necessary to adjust the tension applied to the tension wheel 11 according to the mass of the governor rope 4. Therefore, in the present invention, tension is applied to the governor rope 4 using the weight of the tensioning wheel 11 using the bottom surface 2 of the pit.

FIG. 2 is a main part top view and a main part side view of an elevator tensioning apparatus installed at the bottom of a hoistway in the elevator apparatus according to Embodiment 1 of the present invention.
In FIG. 2, the elevator tensioning device includes a tensioning vehicle 11, a tensioning vehicle holder 26, a tension wire pulley 20, a weight 22, a tension wire 21, a tensioning vehicle guide 14, and a tensioning vehicle rail 15.
A pair of guide rails 3 extending in the height direction of the hoistway 1 and being substantially parallel to the guide rails 3 attached to the side walls of the hoistway 1 via brackets (not shown) and larger than the diameter of the tensioning wheel 11 A tensioner rail 15 is arranged. The guide rail 3 guides the raising and lowering of the car 7. The tension wheel rail 15 and the guide rail 3 are connected by bolts to a plurality of arms 16 extending in a direction substantially orthogonal to the guide rail 3 or the tension wheel rail 15 and spaced from each other. The tension wheel rail 15 is a member having a substantially crank-shaped cross section, and is attached to the tension wheel 11 and the tension wheel holder 26 via the tension wheel guide 14 for moving the tension wheel 11 and the tension wheel holder 26 in the vertical direction. ing. In other words, the tensioning wheel guide 14 is fixed to both side surfaces of the arm 16 in the longitudinal direction of the tensioning wheel holder 26 having a square cross section by welding or the like, and one side of the tensioning wheel rail 15 is inserted into a groove provided in the tensioning wheel guide 14. By being fitted without being fixed, the tension wheel rail 15 is sandwiched from both side surfaces.

  A lower loop portion of the governor rope 4 that circulates as the car 7 moves up and down is wound around the tensioning wheel 11. In addition, tensioner holders 26 are arranged on four sides of the tensioner 11 so as to cover the tensioner 11. The tension wheel holder 26 is a combination of, for example, a pair of substantially I-shaped plates that are larger than the side surface of the tension wheel 11 and a pair of substantially U-shaped plates that are fastened with bolts. It has a square shape and covers the side surface of the tension wheel 11. In other words, the tension wheel 11 is attached inside the tension wheel holder 26. The tensioner holder 26 is for protecting the tensioner 11, and the tensioner guide 14 that fits the tensioner rail 15 and moves the tensioner guide 14, the tensioner 11 and the tensioner holder 26 up and down. It is for attaching. Of course, it is not always necessary to cover the entire circumference of the tension wheel 11, but in order to protect the tension wheel 11, it is desirable to provide two or more tension wheel holders 26 to cover the side surfaces of the tension wheel holders 26. .

Further, a fixed shaft 27 is fixed by welding or the like in a pair of substantially I-shaped plates and in a facing direction, and the vehicle is stretched through a bearing 23 fixed so as to cover the periphery of the shaft 27. 11 rotates. A part of the shaft 27 penetrates a plate having a substantially I-shaped cross section, which is a part of the tension wheel holder 26, and protrudes to the outside of the tension wheel holder 26. A rotatable tension wire pulley 20 is attached to the protruding portion of the shaft 27 via a bearing 23 a provided around the protruding portion of the shaft 27. That is, the tension wire pulley 20 and the tensioning wheel 11 have a structure that can rotate independently of each other. However, the tension wire pulley 20 may be directly attached to the fixed shaft 27 without providing the bearing 23 a on the projecting portion (projecting shaft) of the shaft 27. Further, the shaft 27 and the protruding shaft may be configured separately. Further, the tension wire pulley 20 is provided close to the tensioning wheel 11. By bringing the tension wire pulley 20 close to the tension wheel 11, the suspension point of the weight 22 and the center of gravity of the tension wheel 11 can be brought closer. Accordingly, the moment is reduced, and the tension wheel 11 can be moved up and down smoothly along the tension rail 15.
Further, the tension wire pulley 20 can be disposed inside the tension wheel holder 26 and attached to the shaft 27, and the tension wire pulley 20 is not necessarily provided on the protruding portion (projecting shaft) of the shaft 27.
Further, the tension wire pulley 20 can be provided in the tensioning wheel holder 26 substantially parallel to the tensioning wheel 11. Further, the tensioning wheel holder 26 does not have to have a rectangular shape in cross section. For example, the tensioning wheel holder 26 moves up and down along the tensioning wheel rail 15 such as a U-shaped section or a crank shape in section. Any shape that can fix the tensioner guide 14 may be used.

A tension wire 21 is wound around the tension wire pulley 20 from above, one end of which is attached to the pit floor 2 near the tension wire pulley 20 and the other end is attached to the weight 22. A weight 22 suspended from the other end applies a load to the tensioning wheel 11. At this time, the tension wire 21 on the side extending from the tension wire pulley 20 to the pit floor 2 is preferably attached to the pit floor 2 so as to be arranged perpendicular to the pit bottom 2. As a result, a load equivalent to the mass of the weight 22 can be applied to the tension wheel 11 separately from the mass of the weight 22.
The other end of the tension wire 21 suspends a weight 22 at the center of gravity, and the weight 22 moves up and down without tilting. In addition, since the weight 22 and the tension wire 21 are arranged in the horizontal direction of the tension wheel 11, the weight 22 and the tension wire 21 do not come into contact with each other even if the tension wire 21 is moved up and down. Further, the diameter of the tension wire pulley 20 is set so that the weight wire 22 and the tension wire 21 on one end side extending from the tension wire pulley 20 to the pit floor surface in the immediate vicinity are not in contact with each other. For example, a tension wire 21 made of a steel wire is used, but other materials may be used as long as they can withstand the weight applied to the tension wire 21. The material of the weight 22 may be, for example, a steel plate, casting, concrete, etc., but an iron weight is preferable in order to reduce the volume as much as possible. Further, a spring or the like may be used instead of the weight 22. For example, one end of the spring is attached to the pit floor 2 and the other end of the spring is attached to the other end of the tension wire 21. As an attaching method, a tension wire 21 formed by hooking the tip end to a hook portion formed at both ends of the spring and a hook member hitting the pit floor 2 may be hooked.

As a method for attaching the tension wire 21 and the pit floor 2 in the vicinity of the tension wire pulley 20, for example, a pair of L-shaped members (not shown) are set up against the pit floor 2 to stand. Place the anchor bolt on the L-shaped member and fix it to the pit floor 2. Then, a hole is made in each piece of the pair of cross-sectional L-shaped members extending in a direction substantially orthogonal to the pit floor 2 so that the pin can be passed in the direction in which the cross-sectional L-shaped member faces. One end of the tension wire 21 is formed in a ring shape, a pin is passed through the one end of the ring shape, and then fixed to the L-shaped member through the pin. Similarly, a method for attaching the tension wire 21 and the weight 22 is also achieved by fixing a pair of cross-sectional L-shaped members to the upper surface of the weight 22 with anchor bolts, and making the tip end ring-shaped in the holes provided in the pair of cross-sectional L-shaped members. The other end of the formed tension wire 21 is passed through the pin, and then fixed to the L-shaped member through the pin. However, a member larger than the hole may be attached to the tip of the tension wire 21 drawn out from the lower part of the weight 22 by inserting the tension wire 21 through a hole penetrating up and down the weight 22. By doing so, when the tension wire 21 is lifted, the member is caught by the lower part of the weight 22 without passing through the hole, and the weight 22 is suspended. This member is, for example, a pair of members having a recess having a semicircular cross section, and a method of fixing the tension wire 21 from both sides in accordance with the recess by a clamping bolt is conceivable.

Next, the operation and action of the elevator tension vehicle apparatus in the elevator apparatus will be specifically described.
In FIG. 2, a tension wire 21 is suspended from the tension wire pulley 20, and one end thereof is attached to the pit floor 2 near the tension wire pulley 20 and the other end is attached to the weight 22. A load twice the mass of the weight 22 is applied using the principle of a moving pulley. Accordingly, a mass twice the mass of the weight 22 can be added to the tension wheel 11.

  When the governor rope 4 expands or contracts due to secular change or the like, the tensioning wheel guide 14 and the tensioning wheel holder 26 that are interlocked in the vertical direction along the tensioning rail 15 attached to the guide rail 3 via the arm 16. The tension wheel 11, the tension wire pulley 20 and the weight 22 are moved. When the tensioner guide 14, tensioner holder 26, tensioner 11, tension wire pulley 20 and weight 22 are moved up and down, the position of the weight 22 changes and the tension wire pulley 20 rotates.

When the governor rope 4 is contracted, it is necessary to raise the position of the tension wheel 11. When the position of the tensioning wheel 11 is raised, one end of the tension wire 21 is fixed to the pit floor 2 near the tension wire pulley 20, so the moving distance of the weight 22 attached to the other end is the tensioning wheel 11. And, it becomes relatively longer than the moving distance of the tension wheel holder 26. That is, the distance between the tension wheel holder 26 and the weight 22 is relatively reduced.
Therefore, it is preferable to secure a minimum distance between the tension wheel holder 26 and the weight 22 assuming that the governor rope 4 is contracted.

However, if the distance between the tensioner holder 26 and the weight 22 is set too long, the distance between the tensioner holder 26 and the weight 22 relatively increases when the governor rope 4 is extended. 22 hits the pit floor 2 early. On the other hand, if the distance between the tensioning wheel holder 26 and the weight 22 is set too short, the distance between the tensioning wheel holder 26 and the weight 22 is relatively reduced when the governor rope 4 is contracted, and the weight 22 and the tensioning wheel are reduced. The holder 26 comes into contact. Therefore, the distance between the tensioner holder 26 and the weight 22 may be set in consideration that the shrinkage of the governor rope 4 does not occur much compared to the extension.

  According to the elevator apparatus of the first embodiment as described above, the tension wire pulley 20 is attached to the shaft 27 of the tension pulley 11 via the bearing 23a by using the principle of the moving pulley. Since the tension wire 21 having one end attached to the pit floor 2 near the tension wire pulley 20 and the other end attached to the weight 22 is wound around the tension wire 21, the tension corresponding to the mass of the weight 22 is doubled. Can be added to the tensioning wheel 11 and thus the governor rope 4, and the mass of the necessary weight 22 can be suppressed to about ½ of the mass necessary for the tensioning wheel 11, and the cost can be reduced. Moreover, since the mass of the necessary weight 22 is suppressed to about ½ of the mass required for the tensioning wheel 11, the workability of maintenance personnel is improved. Further, since the suspension point of the weight 22 and the center of gravity of the tensioning vehicle 11 are brought close to each other, the moment is reduced and the tensioning vehicle 11 can be moved up and down smoothly along the tensioning vehicle rail 15.

  In addition, although the example which attached the pulley 20 for tension wires to the side surface of the tension vehicle holder 26 was shown above, you may attach the pulley 20 for tension wires to both sides, respectively. That is, the tension wheel 11 and a pair of tension wire pulleys 20 sandwiching both side surfaces of the tension wheel 11 may be attached to one shaft 27 via the respective bearings 23a and 23b.

FIG. 3 shows a top view of a main part of an elevator tension vehicle apparatus in an elevator apparatus different from that in FIG. 2 according to Embodiment 1 of the present invention. Note that the same configuration as above is omitted as appropriate.
As shown in FIG. 3, a part of the shaft 27 of the fixed tension wheel 11 protrudes in a direction substantially orthogonal to the side surface of the tension wheel 11 from both side surfaces of the tension wheel 11. The bearings 23a and 23b are also fixed to some portions. At this time, the pair of tension wire pulleys 20 are arranged symmetrically with respect to the center of the tension wheel 11. Further, two tension wire pulleys 20 and 20a are attached to bearings 23a and 23b on both sides of the tension wheel 11 with the tension wheel 11 as a target. That is, the tension wheel 11, the tension wire pulley 20, and the tension wire pulley 20a can rotate independently of each other.

  In FIG. 3, one end of each of the tension wires 21 and 21a wound around the two tension wire pulleys 20 and 20a is attached to the pit floor 2 near the tension wire pulleys 20 and 20a, respectively. The other end of 21a is attached to one weight 22, respectively. Further, the diameters of the tension wire pulleys 20 and 20a are increased to such an extent that the tension wires 21 and 21a on the side extending to the pit floor 2 near the tension wire pulleys 20 and 20a do not contact the weights 22. .

  As a result, the tension applied to the tension wire pulleys 20 and 20a can be applied to the center of the tensioning wheel 11, so that a moment does not act on the tensioning wheel 11 due to the ramp of the governor rope 4 and the like. Can be prevented, and a vertical downward tension can be applied to the governor rope 4. Furthermore, when the elevator tension vehicle device 10 receives an upward force from the governor rope 4, the weight 22 is caught on the tension vehicle 11, so that the tension vehicle 10 can be prevented from jumping up.

Furthermore, by reducing the height of the weight 22, the time until the governor rope 4 extends due to secular change or the like and the position of the weight 22 falls and attaches to the pit floor 2 is relatively longer than that in FIGS. 2 and 3. can do.
FIGS. 4A and 4B are a top view and a side view of main parts of an elevator tension vehicle apparatus in the elevator apparatus different from FIGS. 2 and 3 according to the first embodiment. In addition, about the structure similar to the above, it abbreviate | omits suitably.

As shown in FIG. 4, two tension wire pulleys 20, 20 a are attached to bearings 23 a, 23 b on both side surfaces of the tension wheel 11 for the tension wheel 11.
The tension wires 21 and 21a on the side extended from the tension wire pulleys 20 and 20a to the pit floor 2 near the tension wire pulleys 20 and 20a are arranged point-symmetrically with respect to the center of the tensioning wheel 11. The holes 24, 24a provided in the weight 22 are inserted. The tension wires 21 and 21a on the side arranged to extend from the tension wire pulleys 20 and 20a to the pit floor 2 near the tension wire pulleys 20 and 20a are point-symmetric with respect to the center of the tensioning wheel 11. Is arranged. At this time, the center of gravity of the weight 22 coincides with the center of gravity of the tension wheel 11 in the top view. Further, the other ends of the tension wires 21 and 21 a are attached to the same weight 22. Thereby, the suspension point position of the weight 22 and the gravity center position of the tensioning wheel 11 can be matched.

  Here, notches may be provided in place of the holes 24 and 24a provided in the weight 22, and the tension wires 21 and 21a may be formed so that the weight 22 can be inserted. Further, the width of the weight 22 in the longitudinal direction of the arm 16 is substantially the same as the width of the tension wheel holder 26, and the weight guide 25 welded and fixed to both end surfaces of the weight 22 extends the tension wheel rail 15 extending vertically. The weight 22 is fitted and can be moved up and down along the tension rail 15. The weight guide 25 has the same shape as the tension wheel guide 14 and is disposed directly below the tension wheel guide 14.

  Thereby, it is possible to guide not only the vertical movement of the tension wheel 11 but also the vertical movement of the weight 22 with a simple configuration.

Embodiment 2. FIG.
The configuration and operation of the second embodiment will be described. Note that the same configuration and operation as those in Embodiment 1 are omitted as appropriate.
In the first embodiment, one tension wire pulley is attached to one side surface or both side surfaces of the tension wheel 11 via the tension wheel holder 26. On the other hand, in the second embodiment, a plurality of tension wire pulleys 28 and 28 a are attached to one side surface of the tension pulley holder 26.

FIGS. 5A and 5B are a top view and a side view of main parts of an elevator tension vehicle apparatus in an elevator apparatus according to Embodiment 2 of the present invention.
For example, three rotatable tension wire pulleys 28 in the longitudinal direction of the tensioning wheel holder 26 are disposed on one side surface of the tensioning wheel holder 26 in the horizontal direction at intervals of the tension wire pulley 28. Arranged to be empty. One of the three tension wire pulleys 28 has the same configuration as that of the tension wire pulley 20 shown in the first embodiment, and the shaft 27 of the tensioning wheel 11 protruding outside the tensioning wheel holder 26. The protrusion is attached via a bearing 23a.
Further, the remaining two tension wire pulleys 28 are provided in directions substantially perpendicular to one side surface of the tensioning wheel holder 26, that is, substantially parallel to the shaft 27 and welded and fixed to the tensioning wheel holder 26. It is rotatably attached to 30 via a bearing. The shaft 30 is the same side surface as the side surface from which the protruding portion of the shaft 27 protrudes, and a plurality of shafts 30 are fixed to both sides of the protruding portion of the shaft 27. The three tension wire pulleys 28 are arranged in a substantially straight line.

On the other hand, below the three tension wire pulleys 28, that is, at a certain height from the pit floor 2, for example, two rotatable tension wire pulleys 28a are spaced apart by the tension wire pulley 28a in the horizontal direction. It is fixed in the space. At this time, the tension wire pulley 28 and the tension wire pulley 28a have, for example, the same shape and the same size. As a method of fixing the tension wire pulley 28a, for example, a pair of L-shaped members are opposed to the pit floor surface 2 and are erected and fixed to the pit floor surface 2 with anchor bolts. And the axis | shaft extended in the direction where a pair of cross-section L-shaped member opposes is fixed to the surface extended perpendicularly | cross of a cross-section L-shaped member. Then, the tension wire pulley 28a is fixed through the shaft.
An intermediate portion of the tension wire 29 is alternately wound around a tension wire pulley 28 and a tension wire pulley 28a. One end of the tension wire 29 is attached to the pit floor 2 and the other end is attached to the weight 22. It has been. That is, the tension wire 29 is wound around the tension wire pulley 28 from above from one end of the tension wire 29 and then wound around the tension wire pulley 28a from below. Thereafter, the wire is wound around another tension wire pulley 28 from above, wound around another tension wire pulley 28a from below, and further wound onto another tension wire pulley 28 from above. A weight 22 is suspended from the other end of 29.
At this time, the mass applied to the tensioning wheel 11 is six times that of the weight 22 (not considering the mass of the tension wire pulleys 28 and 28a and the mass of the tension wire 29) due to the principle of the moving pulley, and the governor rope 4 when the car is braked. What is necessary is just to use the weight 22 of the mass of 1/6 of required weight.

As the governor rope 4 expands and contracts, when the tensioner holder 26, the tensioner 11 and the tension wire pulley 28 rise along the tensioner rail 15, the weight 22 is reduced while reducing the relative distance between the tensioner holder 26 and the weight 22. Rises. On the contrary, when the tensioner holder 26, the tensioner 11 and the tension wire pulley 28 are lowered along the tensioner rail 15, the weight 22 is lowered while the relative distance between the tensioner holder 26 and the weight 22 is increased. At this time, since the tension wire pulley 28a is a constant pulley, the tension wire pulley 28a is kept stationary without being influenced by the lifting of the tension wheel 11.
Moreover, since the tension wire pulleys 28 and 28a and the tensioning wheel 11 are attached via independent bearings, they rotate independently of each other.
Further, the tension wire pulleys 28 and 28 a are provided close to the tensioning wheel 11. By placing the tension wire pulleys 28 and 28a close to the tensioning wheel 11, the suspension point of the weight 22 and the center of gravity of the tensioning wheel 11 can be brought close to each other. Accordingly, the moment is reduced, and the tension wheel 11 can be moved up and down smoothly along the tension rail 15.

In the above, an example in which a total of five tension wire pulleys 28 and 28a are used has been described. However, more or less tension wire pulleys may be provided. Thereby, the mass of the weight 22 attached to the other end of the tension wire 29 can be further reduced.
Further, a plurality of tension wire pulleys can be provided on both side surfaces by applying the example shown in FIG. Thereby, the suspension point position of the weight 22 and the gravity center position of the tensioning wheel 11 can be matched. Furthermore, it is possible to guide not only the vertical movement of the tension wheel 11 but also the vertical movement of the weight 22.

  According to the elevator apparatus of the second embodiment as described above, a plurality of tension wire pulleys 28 are provided on one side surface of the tension vehicle holder 26, and a plurality of tension wire pulleys 28a are provided on the pit floor surface 2. Since one end of the tension wire 29 wound alternately around the tension wire pulleys 28 and 28a is attached to the pit floor 2 and the other end is attached to the weight 22, the weight is adjusted according to the number of tension wire pulleys 28 and 28a. The mass reduction effect of 22 is improved.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Pit floor surface 3 Guide rail 4 Governor rope 5 Main rope 6 Counterweight 7 Car 8 Governor 10 Elevator tension device 11 Tensioner 14 Tensioner guide 15 Tensioner rail 16 Arm 17 Hoisting machine 18 Link mechanism 20 20a Tension wire pulley 21, 21a, 29 Tension wire 22 Weight 23, 23a, 23b Bearing 24, 24a Hole 25 Weight guide 26 Tension wheel holder 27, 30 Shaft 28, 28a Pulley for tension wire

Claims (7)

Provided in the hoistway, to raise and lower the hoistway,
A governor rope supported in the vicinity of the top of the hoistway, and a tension wheel around which the lower loop portion of the endless governor rope that circulates as the car ascends and descends is wound,
A first shaft that supports the rotation of the tensioning wheel is fixed to cover the side surface of the tensioning wheel, and the tensioning vehicle extends along the tensioning wheel rail that is fixed to a guide rail that guides the raising and lowering of the car and extends vertically. A tensioning wheel holder that can move up and down,
A first pulley provided on a first shaft of the tensioning wheel and movable up and down along with the tensioning wheel along the tensioning wheel rail;
A tension wire wound around the first pulley from above, one end of which is attached to the bottom of the hoistway and a load is applied to the tension wheel by a weight suspended from the other end;
An elevator apparatus comprising: Elevator device according to claim 1, characterized in that said first pulley digits set in close proximity to the tensioning wheel.   3. The elevator apparatus according to claim 1, wherein a pair of the first pulleys provided on the first shaft of the tension wheel is provided point-symmetrically with respect to a center of the tension wheel.   The pair of tension wires on one end side, which are arranged extending from the pair of first pulleys to the bottom of the hoistway, are inserted through holes or grooves respectively provided in the weights and centered on the tensioning wheel. 4. The elevator apparatus according to claim 3, wherein the elevator apparatus is arranged point-symmetrically with respect to each other and each other end is attached to the same weight.   The elevator apparatus according to claim 4, wherein the weight is moved up and down along the tensioner rail by a weight guide provided on the weight. The first pulley is provided at a protruding portion of the first shaft protruding outside the tensioning wheel holder, and is on the same side surface as the protruding side surface of the protruding portion of the first shaft and the first pulley. A second rotatable pulley provided on each second shaft fixed on both sides of the protruding portion of the shaft; and a rotatable second pulley provided below the first pulley and the second pulley. 3 pulleys,
The tension wire is wound around one of the second pulleys from above, wound around one of the third pulleys from below, and then wound around the first pulley from above. After being wound around the other pulley, after being wound around the other third pulley from below, the weight is hung around the other end of the tension wire after being wound around the other second pulley from above. The elevator apparatus according to claim 1, wherein the elevator apparatus is lowered. The elevator apparatus according to claim 6 , wherein the first pulley, the second pulley, the third pulley, and the tension wheel rotate independently of each other.

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