JP2005212945A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of precluding an operating obstruction generated by the increase of the tension ratio of the main cables in association with the elevating position of an elevator car etc. without requiring widening of the elevator shaft. <P>SOLUTION: An adjusting weight 10 is kept at a first elevating body 9 when a first elevating body 6 has elevated to upper part of the elevating stroke, and the mass of the adjusting weight 10 acts on the main cables 5 through the first elevating body 6 so as to suppress the decrease in the tension of the main cables 5 on the side with the first elevating body 6. Thereby a change in the ratio of the tension of the main cables 5 on the side with the first elevating body 6 based on the elevating position of the first elevating body 6 to the tension of the main cables 5 on the side with a second elevating body 7 can be suppressed within the traction ability range of the main cables 5 at a winch 3, and normal transport can be conducted. This allows omission of a balance rope and a balance pulley between the car and a counterweight, to enable suppressing the construction cost of the elevator shaft 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a traction type elevator apparatus in which a middle portion of a main rope is wound around a hoisting machine, and a car is connected to one end and a counterweight is connected to the other end.

  In a conventional traction type elevator device, the longitudinal middle of the main rope is wound around a hoisting machine, and a car is connected to one end and a counterweight is connected to the other end. When the elevator is operated, the car and the counterweight are lifted and lowered in opposite directions. At this time, depending on the lift position of the car and the counterweight in the hoistway, for example, the mass of the main rope above the car gradually increases with respect to the counterweight side as the car descends. For this reason, the traction capability of the main rope in the hoisting machine may be reduced, and the operation of the elevator may be hindered.

  In order to prevent the occurrence of driving troubles due to the mass of the main rope changing on the car side and the counterweight side depending on the lifting position of the car etc., the counter rope between the car and the counterweight is below Is suspended, and the change in the mass of the main rope due to the raising / lowering position of the car or the like is compensated. And in order to give tension | tensile_strength to a balance rope, a balance wheel is arrange | positioned in the pit of a hoistway, and it is equipped with the curved part of the balance rope suspended and formed in the straddle state. (For example, refer to Patent Document 1 as an elevator apparatus in which a balance rope is suspended).

JP-A-11-255542 (second page, FIG. 11)

  In the conventional elevator apparatus, it is necessary to widen the hoistway pit in order to secure a space for arranging the suspension vehicle in the pit of the hoistway, and the construction cost of the hoistway increases and the cost for installing the elevator increases. There was a problem.

  The present invention has been made to solve such problems, and an object of the present invention is to provide an elevator apparatus capable of preventing the occurrence of an operation failure associated with a lift position such as a car without expanding a hoistway pit. To do.

  In the elevator apparatus according to the present invention, the longitudinal middle is wound around the hoisting machine and is suspended from the hoistway. The first elevating body for raising and lowering the hoistway is connected to one end, and the hoistway is raised and lowered to the other end. A main rope coupled to the second lifting body, a support provided in the hoistway and disposed at an intermediate position of the hoisting process of the first lifting body, and held by the first lifting body at the upper part of the hoistway There is provided an adjustment weight that moves up and down together with the one lifting body and is supported by the support body by the downward movement of the first lifting body and reduces the increase in the tension of the main rope on the first lifting body side.

  The elevator apparatus according to the present invention can prevent the occurrence of operation trouble due to the mass change of the main rope on the first lifting body side and the second lifting body side depending on the lifting position of the first lifting body as described below. That is, for example, when the first lifting body is raised above the lifting stroke, the drooping length of the main rope on the first lifting body side is reduced, and the tension due to the own mass of the main rope is reduced. However, when the first lifting body is raised above the lifting stroke, the adjustment weight is held by the first lifting body, and the mass of the adjustment weight acts on the main rope via the first lifting body, so that the first lifting A decrease in tension of the main rope on the body side is suppressed.

  As a result, the change in the ratio between the main rope tension on the first lift body side and the main rope tension on the second lift body caused by the lift position of the first lift body is suppressed within the traction capacity range of the main rope in the hoisting machine. And the elevator can be operated normally. For this reason, it is possible to omit the installation of the balance wheel for suspending the balance rope between the above-described cage and the counterweight and applying tension to the balance rope. Therefore, it is not necessary to widen the hoistway pit in order to secure a space for arranging the suspension vehicle in the pit of the hoistway, and it is possible to reduce the construction cost of the hoistway and reduce the cost required for elevator installation.

Embodiment 1 FIG.
1 and 2 are views showing an embodiment of the present invention. FIG. 1 is a conceptual longitudinal sectional view, and FIG. 2 is a view showing a lifted state of a car or the like in FIG. In the figure, a machine room 2 is provided in the upper part of the hoistway 1 and a hoisting machine 3 and a deflector 4 are installed. And the 1st raising / lowering which consists of the driving sheave of the hoisting machine 3 and the deflecting wheel 4 is wound around the longitudinal middle of the main rope 5, and one end of the main rope 5 moves up and down the predetermined path of the hoistway 1. The body 6 is connected.

  Further, a second lifting / lowering body 7 composed of a counterweight that lifts / lowers another predetermined path of the hoistway 1 is connected to the other end of the main rope 5. And the 1st support body 8 is provided in the path | route of the 1st raising / lowering body 6 of the hoistway 1, and is arrange | positioned in the intermediate position of the raising / lowering stroke in the 1st raising / lowering body 6. FIG. A second support body 9 is provided in the path of the second lifting body 7 of the hoistway 1 and is disposed at an intermediate position of the lifting stroke in the second lifting body 7.

  When the first adjustment weight 10 is held by the first lifting body 6 in the upper part of the hoistway 1 and is lifted together with the first lifting body 6, the first lifting body 6 is lowered and passes through the first support body 8. To the first support body 8 to reduce the increase in tension accompanying the increase in the length of drooping of the main rope 5 on the first lifting body 6 side. Further, when the second adjustment weight 11 is held by the second lifting body 9 in the upper part of the hoistway 1 and lifts together with the second lifting body 7, and the second lifting body 7 descends and passes through the second support body 9. The increase in tension accompanying the increase in the drooping length of the main rope 5 on the second lifting body 7 side is reduced by the second support body 9.

  In general, a machine base made of steel beams is provided in the machine room 2, the hoisting machine 3 is installed on the machine base, and the deflector 4 is mounted on the machine base. Elevator loads such as the loading load of the hoisting machine 3, the deflecting wheel 4, the main rope 5, the first elevating body 6, the second elevating body 7 and the first elevating body 6 act on the machine base. The load is supported by the structure of the hoistway 1 via the machine base.

  In the elevator apparatus configured as described above, the hoisting machine 3 is energized to operate the elevator, and the first lifting body 6 and the second lifting body 7 are lifted and lowered in opposite directions via the main rope 5. At this time, the mass of the main rope 5 above the first elevating body 6 is increased, for example, as the first elevating body 6 is lowered by the elevating position of the first elevating body 6 and the second elevating body 7 in the hoistway 1. It gradually increases with respect to the second lifting body 7 side.

  For this reason, the traction capability of the main rope 5 in the hoisting machine 3 is reduced and slipping may occur, which may hinder the operation of the elevator. However, such a raising / lowering position of the first lifting / lowering body 6 or the like prevents the occurrence of operation trouble due to the mass change of the main rope 5 on the first lifting / lowering body 6 side and the second lifting / lowering body 7 side as described below. .

  That is, when the first lifting / lowering body 6 is raised above the lifting / lowering stroke, the first adjustment weight 10 is held by the first lifting / lowering body 6, and at this time, the second lifting / lowering body 7 is lowered below the lifting / lowering stroke. Then, the second adjustment weight 10 is supported by the second support body 9 to be in the state shown in FIG. And in this state, although the drooping length of the main rope 5 on the first lifting body 6 side is reduced and the tension due to the own mass of the main rope 5 is reduced, the mass of the first adjustment weight 10 causes the first lifting body 6 to move. Therefore, the tension of the main rope 5 on the first lifting body 6 side is reduced.

  In addition, in the state shown in FIG. 1, the drooping length of the main rope 5 on the second lifting and lowering body 7 side is increased and the tension due to the own mass of the main rope 5 is increased, but the mass of the second adjustment weight 11 is the second support. By being supported by the body 9, an increase in the tension of the main rope 5 on the second lifting body 7 side is suppressed. As a result, the change in the ratio between the main rope 5 tension on the first elevator body 6 side and the main rope 5 tension on the second elevator body 7 side caused by the raising / lowering position of the first elevator body 6 or the like is changed in the hoisting machine 3. The elevator can be operated normally by preventing the occurrence of slippage within the range of the traction capacity of the main rope 5.

  When the second lifting body 7 is raised above the lifting stroke, the second adjustment weight 11 is held by the second lifting body 7, and at this time, the first lifting body 6 is lowered below the lifting stroke. Then, the first adjustment weight 10 is supported by the first support 8 and the state shown in FIG. 2 is obtained. In this state, the drooping length of the main rope 5 on the second lifting body 7 side decreases and the tension due to the own mass of the main rope 5 decreases, but the mass of the second adjustment weight 11 causes the second lifting body 7 to move. Therefore, the tension of the main rope 5 on the second lifting body 7 side is suppressed from decreasing.

Therefore, although detailed description is omitted, even in the state shown in FIG. 2, the operation in the state shown in FIG. 1 can be obtained.
For this reason, it is possible to suspend the counter rope between the above-described cage and counterweight and to omit the installation of the counterbalance for applying tension to the counter rope. Therefore, it is not necessary to expand the hoistway 1 pit in order to secure a space for arranging the suspension vehicle in the pit of the hoistway 1. Thereby, the construction cost of a hoistway can be reduced and the cost for elevator installation can be reduced.

Embodiment 2. FIG.
Further, in the embodiment shown in FIGS. 1 and 2, the adjustment weight is arranged for only one of the first lifting body 6 and the second lifting body 7, and the support body that supports the adjustment weight is the hoistway 1. It is set as the structure provided in. Even in such a configuration, for example, when one of the both rises above the lifting stroke in one of the two, the adjustment weight is held by one of the both.

  And although the drooping length of the main rope 5 on one side of both is reduced and the tension due to the own mass of the main rope 5 is reduced, the mass of the adjusting weight acts on the main rope 5 via one of the both. Therefore, the tension | tensile_strength reduction of the main rope 5 of the one said both sides is suppressed. Therefore, although detailed description is omitted, even in a configuration in which the adjustment weight and the support are provided only in one of the above-described two, an operation according to the operation of the embodiment of FIGS. 1 and 2 can be obtained. .

Embodiment 3 FIG.
FIG. 3 is a view corresponding to FIG. 1 showing another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote corresponding parts, and a lower adjustment weight 12 wider than the horizontal projection surface of the first elevating body 6 is placed on and held on the first elevating body 6. An upper adjustment weight 13 wider than the lower adjustment weight 12 is placed on the weight 12 and held. And the lower support body 14 is provided in the hoistway 1 and is disposed at an intermediate position of the elevating process in the first elevating body 6, and the upper support body 15 is provided in the hoistway 1 and the elevating process in the first elevating body 6. The intermediate position is located above the lower support 14.

  In the elevator apparatus configured as described above, the hoisting machine 3 is energized to operate the elevator, and the first lifting body 6 and the second lifting body 7 are lifted and lowered in opposite directions via the main rope 5. At this time, the mass of the main rope 5 above the first lifting body 6 as the first lifting body 6 descends, for example, depending on the lifting position of the first lifting body 6 and the second lifting body 7 in the hoistway 1, It gradually increases with respect to the second lifting body 7 side.

  For this reason, the traction capability of the main rope 5 in the hoisting machine 3 may be reduced, causing trouble in the operation of the elevator. However, such a raising / lowering position of the first lifting / lowering body 6 or the like prevents the occurrence of operation trouble due to the mass change of the main rope 5 on the first lifting / lowering body 6 side and the second lifting / lowering body 7 side as described below. .

  That is, when the first lifting / lowering body 6 rises above the lifting / lowering stroke, the lower adjustment weight 12 is placed and held on the first lifting / lowering body 6, and the upper adjustment weight 13 is placed on the lower adjustment weight 12. It will be mounted and hold | maintained and it will be in the state shown in FIG. In this state, although the drooping length of the main rope 5 on the first lifting body 6 side is reduced and the tension due to the own mass of the main rope 5 is reduced, the mass of the lower adjustment weight 12 and the upper adjustment weight 13 is the first. Since it acts on the main rope 5 via the elevating body 6, a decrease in the tension of the main rope 5 on the first elevating body 6 side is suppressed.

  Further, when the first elevating body 6 is lowered from the state shown in FIG. 3, the drooping length of the main rope 5 on the first elevating body 6 side gradually increases and the tension due to the own mass of the main rope 5 increases, but the upper support The upper adjustment weight 13 is supported by the upper support 15 when the first elevating body 6 passes through the position of the body 15. Further, when the first elevating body 6 is further lowered and the first elevating body 6 passes through the position of the lower support body 14, the lower adjustment weight 12 is supported by the lower support body 14.

  Accordingly, an increase in tension due to the own mass of the main rope 5 due to the lowering of the first elevating body 6 is suppressed in two stages by the two places where the upper support 15 and the lower support 14 are installed. For this reason, the change in the ratio between the main rope 5 tension on the first elevator body 6 side and the main rope 5 tension on the second elevator body 7 side caused by the raising / lowering position of the first elevator body 6 is changed to the main rope in the hoisting machine 3. The traction capability range of 5 can be suppressed, and the elevator can be operated normally. Therefore, the installation of the balancing rope and the balancing vehicle can be omitted, and the operation according to the operation of the embodiment of FIGS. 1 and 2 can be obtained.

  In addition, an increase in tension due to the own mass of the main rope 5 due to the lowering of the first elevating body 6 is suppressed in two stages by two locations of the upper support 15 and the lower support 14. For this reason, the change in the ratio between the main rope 5 tension on the first lifting body 6 side and the main rope 5 tension on the second lift body 7 side is more effectively within the traction capacity range of the main rope 5 in the hoisting machine 3. Can be suppressed. Therefore, normal operation of the elevator can be stabilized.

It is a figure which shows Embodiment 1 of this invention, and is a notional longitudinal cross-sectional view of an elevator apparatus. The figure which shows the raising / lowering state of the cage | basket | car etc. in FIG. It is a figure which shows Embodiment 2 of this invention, and is the above-mentioned equivalent figure of FIG.

Explanation of symbols

  1 hoistway, 3 hoisting machine, 5 main rope, 6 first elevating body, 7 second elevating body, 8 support body, 9 support body, 10 adjusting weight, 11 adjusting weight. 12 lower adjustment weight, 13 upper adjustment weight, 14 lower support, 15 upper support.

Claims (5)

  A longitudinal middle is wound around the hoisting machine, suspended from the hoistway, a first elevating body for raising and lowering the hoistway is connected to one end, and a second elevating body for raising and lowering the hoistway is connected to the other end. A coupled main rope, a support provided in the hoistway and disposed at an intermediate position of the hoisting stroke in the first hoisting body, and held by the first hoisting body at the upper part of the hoistway and An elevator apparatus comprising: an adjustment weight that moves up and down together with one lifting body and is supported by the support body by the downward movement of the first lifting body to reduce an increase in tension of the main rope on the first lifting body side.   A support provided in the hoistway and disposed at an intermediate position of the hoisting stroke in the second hoisting body; held by the second hoisting body at the upper part of the hoistway; The elevator apparatus according to claim 1, further comprising: an adjustment weight that is supported by the support body by the lowering movement of the second elevating body and reduces an increase in tension of the main rope on the second elevating body side.   The support body is composed of a lower support body provided in the hoistway and disposed at an intermediate position of the lifting stroke in the first lift body and an upper support body disposed at a position higher than the lower support body, and an adjustment weight At the upper part of the hoistway is held by the first elevating body and moved up and down together with the first elevating body, and is supported by the lower support body by the lowering movement of the first elevating body and A lower adjustment weight that reduces an increase in the tension of the main rope, and is arranged on the lower adjustment weight and is held by the first lifting body at the upper part of the hoistway so as to move up and down together with the first lifting body. 2. The elevator apparatus according to claim 1, further comprising an upper adjusting weight that is supported by the upper support by a downward movement of the body and reduces an increase in tension of the main rope on the first lifting body side.   The elevator apparatus according to claim 1, wherein the first lifting body is made of an elevator car.   The elevator apparatus according to claim 1, wherein the first elevating body is made of a counterweight of an elevator.

Images