JP4874672B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus that does not include a counterweight.

  A normal elevator is a so-called slewing elevator, which is equipped with a counterweight (balance weight) of the same weight as that of the car, and is used to hold the car on one side of the rope wound around the hoisting machine. It is suspended and the counterweight is suspended on the other side of the rope. Therefore, the tension applied to the ropes on both sides of the hoisting machine is substantially balanced, and the hoisting machine can move the car up and down with a relatively small torque. However, since this lift type elevator requires a hoistway area that is as large as the counterweight, it is difficult to say that it is the best method from the viewpoint of securing the effective space of the building.

  Therefore, recently, an elevator apparatus that does not require a counterweight has been proposed (see Patent Document 1). However, in this method, since no counterweight is provided, a device for generating tension on the ropes on both sides of the hoisting machine and a device for reducing the driving torque of the hoisting machine are required.

  FIG. 10 is an explanatory diagram showing a configuration of a conventional elevator apparatus according to Patent Document 1. As shown in FIG. In this figure, a car door 102 is provided on the front side of the car 101, and a lever 104 is swingably mounted on the back side with a shaft 103 as a fulcrum.

  Upper fixed pulleys 105 to 108 are arranged at the upper part of the hoistway where the car 101 moves up and down, and lower fixed pulleys 109 to 112 are arranged at the lower part of the hoistway. Further, upper movable pulleys 113 to 115 and lower fixed pulleys 109 to 112 are attached to side portions of the car 101. A hoisting machine 119 is disposed above the upper fixed pulley 108.

  The rope 120 having one end attached to the upper surface side of the lever 104 is wound around the hoisting machine 119 after passing through the pulleys 105, 113, 106, 114, 107, 115, 108, while the lower surface of the lever 104 is The rope 120 with the other end attached to the side passes through pulleys 109, 116, 110, 117, 111, 118, and 112 and is then wound around a hoisting machine 119.

  Here, in the above configuration, in addition to the upper fixed pulleys 105 to 108 and the upper movable pulleys 113 to 115, the reason why the lower fixed pulleys 109 to 112 and the lower fixed pulleys 109 to 112 are provided, see FIG. But consider.

  Now, consider a state in which the upper fixed pulley 105 is virtually removed, and one end side of the rope 120 is attached to the fixed wall provided in that portion, and the rope 120 is cut just below the upper fixed pulley 108. It is assumed that the car 101 is suspended in this state.

  Then, since it can be considered that the car 101 is suspended by a total of six ropes on each side of the upper movable pulleys 113 to 115, if the weight of the car 101 is M, it is added per rope. The tension is M / 6. Accordingly, M / 6 is applied to the rope portion attached to the fixed wall as a reaction force of the tension of the rope portion on the upper movable pulley 113 side, and also to the rope portion on one side on the upper fixed pulley 108 side, T1 = M / 6 is added as a reaction force of the tension of the rope portion on the upper movable pulley 115 side. However, since the rope portion on the other side of the upper fixed pulley 108 is cut halfway, no tension is applied to the rope portion, and the tension T2 becomes zero. Therefore, actually, the car 101 is not suspended in such a state, and the car 101 falls downward.

  Therefore, in order to prevent the car 101 from falling downward, the tension T2 needs to be a certain value rather than zero. Therefore, in the conventional apparatus of FIG. 10, in order to ensure a tension T2 of a certain level or more, the lower fixed pulleys 109 to 112 and the lower fixed pulleys 109 to 112 are provided and unwound downward from the upper fixed pulley 108. After the rope 120 passes through these pulleys, the other end side is attached to the lower surface side of the lever 104.

  The ratio of the magnitudes of the tensions T1 and T2 is determined by the distances a and b between the one end side and the other end side of the rope 120 on the lever 104, and T1> T2. The hoisting machine 119 generates a driving torque for moving the car 101 up and down in a state where the tension difference T1-T2 is applied.

Further, when a certain period of time has passed, the rope 120 is stretched due to secular change, and this stretch is absorbed by the lever 104 swinging about the shaft 103 as a fulcrum.
International Patent Application Publication WO 2004/067429 A1

  In the above-described conventional apparatus shown in FIG. 10, in addition to the upper fixed pulleys 105 to 108 and the upper movable pulleys 113 to 115, the lower fixed pulleys 109 to 112 and the lower fixed pulleys 109 to 112 are provided. Since the tensions T1 and T2 can be generated in the rope portions on both sides of the car, and the tensions T1 and T2 are also about 1/6 of the weight M of the car 101, the necessary driving torque of the hoisting machine 119 is required. Has also been reduced.

  However, the presence of a member that protrudes from the back side of the car 101 such as the lever 104 requires a larger hoistway area, resulting in a reduction in the effective space of the building.

  Further, the amount of elongation due to the aging of the rope 120 is absorbed by the swinging of the lever 104, but the rope length of the elevator apparatus that does not include the counterweight is the same as that of the elevator type elevator apparatus. Since the length is much longer than that, there may be a case where absorption cannot be achieved by only swinging the lever 104. In such a case, maintenance work such as cutting the rope 120 to shorten the length must be performed, which results in considerable time and effort.

  Further, a plurality of upper moving pulleys 113 to 115 and lower moving pulleys 116 to 118 are attached to the side surface of the car 101. Naturally, vibrations and noises associated with the rotation of such a large number of pulleys are natural. Since it is transmitted to passengers in the car, the ride quality is deteriorated.

  The present invention has been made in view of the above circumstances, and it is possible to omit members that cause the effective space of a building to be narrowed, and to absorb the elongation of the rope due to secular change without performing maintenance work. It is another object of the present invention to provide an elevator apparatus that does not include a counterweight and that can further suppress deterioration in ride comfort as much as possible.

  As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a carriage arranged in a hoistway so as to be movable up and down, an upper fixed pulley arranged at an upper part of the hoistway, An upper movable pulley disposed below the upper fixed pulley, a car support movable pulley disposed at an upper portion of the car, a lower fixed pulley disposed at a lower portion of the hoistway, and the lower fixed pulley A lower moving pulley disposed above the upper moving pulley, and a positional relationship between the upper moving pulley and the upper moving pulley is fixed, and one end side is attached to the upper part of the hoistway, and the upper moving pulley, the upper fixed pulley, and the car The rope is wound so that the other end is attached to the lower part of the hoistway and the lower moving pulley and the lower fixed pulley are passed through the support pulley, and the wound rope is driven to wind up. By taking the car A hoisting machine for raising and lowering movement, characterized by comprising a.

  The invention according to claim 2 is the invention according to claim 1, wherein the total number of pulleys of the upper moving pulley and the car supporting moving pulley is equal to the number of pulleys of the lower moving pulley. .

  According to a third aspect of the present invention, in the first or second aspect of the invention, when there are a plurality of the car support pulleys, the number included in the total pulley number contributes to one turn of the rope. It is characterized in that one thing is put together.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the upper moving pulley and the lower moving pulley are fixed to the same moving pulley fixing plate. .

  The invention according to claim 5 is the invention according to claim 4, wherein the movable pulley fixing plate is attached to the car via a vibration / noise absorbing member.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the moving pulley fixing plate and the vibration / noise absorbing member are elongated holes having a length sufficient to extend due to secular change of the rope. And the vibration pulley fixing plate and the vibration / noise absorbing member are engaged with the car by engaging means that pass through the elongated hole, and the length of the elongated hole is It is possible to be displaced in the vertical direction within the range.

  According to the present invention, the car support moving pulley is provided at the upper part of the car, the positional relationship between the upper moving pulley and the lower moving pulley is fixed, and further, one end side of the rope at the upper and lower parts of the hoistway Since the other end is attached, it is possible to omit a member that causes the effective space of the building to be narrowed, and to absorb the elongation of the rope due to secular change without performing maintenance work. In addition, the deterioration of ride comfort can be suppressed as much as possible.

  FIG. 1 is a configuration diagram of an elevator apparatus according to a first embodiment of the present invention. A car door 2 is provided on the front side of the car 1, and car support pulleys 3 and 4 are attached to the upper part. The hoisting machine 5 and the upper fixed pulleys 6 and 7 are disposed at the upper part of the hoistway where the car 1 moves up and down, and the lower fixed pulleys 8 to 11 are disposed at the lower part of the hoistway.

  A moving pulley fixing plate 12 is disposed on the side of the car 1, and upper moving pulleys 13 and 14 and lower moving pulleys 15 to 17 are fixed to the moving pulley fixing plate 12. The car 1 is not provided with a member protruding outward from the car such as the lever 104 in FIG.

  One end of the rope 18 is attached to the upper fixed wall 19, and is wound via the upper movable pulley 13, the upper fixed pulley 6, the upper movable pulley 14, the upper fixed pulley 7, and the car support movable pulleys 3 and 4. It is wound around the upper machine 5. The other end of the rope 18 is attached to the lower fixed wall 20, and the lower moving pulley 15, the lower fixed pulley 8, the lower moving pulley 16, the lower fixed pulley 9, the lower moving pulley 17, and the lower fixed pulley 10, 11 is wound around the hoist 5. The rope feed direction of the car supporting pulleys 3 and 4 is perpendicular to the upper fixed pulleys 6 and 7, and the rope feed direction of the lower fixed pulleys 10 and 11 is also perpendicular to the lower fixed pulleys 8 and 9. It has become.

  The number of the moving pulleys attached to the moving pulley fixing plate 12 is two for the upper moving pulley and three for the lower moving pulley. The car is supported by the car support pulleys 3 and 4. Therefore, in the overall configuration of FIG. 1, the number of upper moving pulleys and the number of lower moving pulleys are substantially equal, and it can be considered that the two are balanced. However, in this case, the number of pulleys is counted as one that collectively contributes to one turn of the rope 18. In the above example, the rope 18 descending from the upper fixed pulley 7 is turned up by the two car support pulleys 3 and 4 and then rises toward the hoisting machine 5. The car supporting pulleys 3 and 4 are counted as one when considering the balance between the lower pulleys 15 to 17.

  Next, the tension acting on each part of the rope 18 in the configuration of FIG. 1 will be described with reference to FIG. First, since the car 1 (with a weight of M) is suspended by two ropes on both sides of the car support pulleys 3 and 4, the tensions of these two ropes are respectively M / 2. . Accordingly, M / 2 tension is applied to the left side portion of the hoisting machine 5 and the right side portion of the upper fixed pulley 7 as reaction forces of these tensions.

  Since the right part and the left part of the rope wound around the upper fixed pulley 7 should be balanced, the tension of the left part of the upper fixed pulley 7 is M / 2. As a reaction force of the tension M / 2 at the left portion of the upper fixed pulley 7, a tension of M / 2 is also applied to the right portion of the upper movable pulley 14. Further, since the right side portion and the left side portion of the rope wound around the upper moving pulley 14 should be balanced, the tension of the left side portion of the upper moving pulley 14 is M / 2.

  Hereinafter, similarly, when the tension of each part of the rope 18 on the left and right sides of the upper fixed pulley 6, the left and right sides of the upper movable pulley 13, and the upper fixed wall 19 is obtained, all of them are shown in FIG. / 2.

  Therefore, the movable pulley fixing plate 12 is pulled upward with a tension of (M / 2) × 4 = 2M by the four ropes wound around the upper movable pulleys 13 and 14. In order for the movable pulley fixing plate 12 to stand still against this upward pulling force, the downward pulling force 2M must act on the dynamic pulley fixed plate 12. Since the downward pulling force 2M is the total tension of six wound around the lower movable pulleys 15 to 17, the tension per one is 2M ÷ 6 = M / 3. Therefore, each tension on the right and left sides of the lower fixed wall 20, the lower fixed pulleys 8 to 11 and the right side portion of the hoisting machine 5 is also M / 3.

  As described above, the tension of the left part of the rope wound around the hoisting machine 5 is M / 2, and the tension of the right part is M / 3. Therefore, the hoisting machine 5 has (M / 2) -(M / 3) = M / 6 tension is applied. Therefore, if the diameter of the hoisting machine 5 is D, the driving torque required for the hoisting machine 5 may be a small torque of (M / 6) · D / 2.

  In general, when the number of lower moving pulleys attached to the moving pulley fixing plate 12 is N (N is an integer of 2 or more) and the number of upper moving pulleys is N-1, the driving torque required for the hoist 5 is {M (D / 2) / N (N-1)}, and the driving torque can be reduced as the number of movable pulleys is increased.

  The tension of the four ropes of the upper movable pulleys 13 and 14 is M / 2, and the tension of the six ropes of the lower movable pulleys 15 to 17 is M / 3. This is a reciprocal relationship with respect to the ratio 2/3 of the number of upper moving pulleys and the number of lower moving pulleys attached to the moving pulley fixing plate 12.

  Next, the amount of movement of the car 1 and the movable pulley fixing plate 12 when the hoist 5 performs the hoisting operation of the rope 18 will be described with reference to FIG. For example, when the hoisting machine 5 makes one rotation in the clockwise direction and the feed amount of the rope 18 at that time is L, the section from the right side of the hoisting machine 5 to the lower fixed wall 20 (hereinafter, the rope in this section is In the “lower rope”), the length L of the rope portion is left over. In order to maintain the tension of the rope between the pulleys in the state shown in FIG. 2, the lower moving pulleys 15 to 17 fixed to the moving pulley fixing plate 12 are lifted so that the lower moving pulleys 15 to 17 are wound. What is necessary is just to absorb the length L of this surplus part with the six ropes rotated. Since the amount of absorption per rope at this time is L / 6, the rising amount of the movable pulley fixing plate 12 is also L / 6.

  On the other hand, in the section from the left side of the hoisting machine 5 to the upper fixed wall 19 (hereinafter, the rope in this section is referred to as “upper rope”), the rope portion having the length L is insufficient. However, since the movable pulley fixing plate 12 is raised by L / 6 as described above, the four ropes wound around the upper movable pulleys 13 and 14 (L / 6) × 4 = 4L / 6. This shortage is complemented. Therefore, the remaining 2L / 6 is complemented by the two rope portions on both sides of the car support movable pulleys 3 and 4, and the supplement amount per one is L / 6. That is, the rising amount of the car 1 is also L / 6.

  Thus, when the hoisting machine 5 performs the hoisting operation of the rope 18, the movable pulley fixing plate 12 moves together with the car 1, and the moving amounts of both of them are always equal. That is, the movable pulley fixing plate 12 moves together with the car 1 while maintaining a certain distance from the car 1. Therefore, as shown in FIG. 1, it is possible to adopt a configuration in which only the moving pulley fixing plate 12 is disposed on the side of the car 1 and the moving pulley fixing plate 12 is not attached to the car 1. According to the configuration of FIG. 1, all the moving pulleys other than the car supporting moving pulleys 3 and 4 are attached to the moving pulley fixing plate 12 and are separated from the car 1. It is possible to prevent vibrations and noises generated by the rotation from being directly transmitted to the car 1, and to improve the riding comfort.

  Next, behavior of each member when elongation due to secular change occurs in the rope 18 will be described. The extension of the rope 18 actually occurs over the entire length section from the upper fixed wall 19 to the lower fixed wall 20, but for the sake of easy understanding, when the “upper rope” is extended, The explanation will be divided into two cases where elongation occurs in the “lower rope”.

  First, the case where elongation occurs in the upper rope will be described with reference to FIG. If the amount of elongation of the upper rope is δ, the amount of elongation δ appears as the amount by which the car 1 is lowered. This is because the movable pulley fixing plate 12 is pulled upward by the four ropes wound around the upper movable pulleys 13 and 14 and downward by the six ropes wound around the lower movable pulleys 15 to 17. This is because the amount of elongation δ appears preferentially as the amount of slack on the two ropes on both sides of the car support pulleys 3 and 4. Since the elongation amount δ is shared by the two ropes, the slack amount of the rope per one is δ / 2, and therefore the car 1 is lowered by δ / 2. That is, when the elongation amount generated in the upper rope is δ, the elongation amount δ is absorbed by the lowering of δ / 2 of the car 1.

  Next, the case where elongation occurs in the lower rope will be described with reference to FIG. If the extension amount of the lower rope is δ, the only movable member in the laying section of the lower rope is the movable pulley fixing plate 12, and this elongation amount δ appears as the rising amount of the movable pulley fixing plate 12. Absent. This amount of increase appears as the amount of slack of the six ropes wound around the lower movable pulleys 15 to 17, and the amount of slack per rope is δ / 6. Therefore, the rising amount of the movable pulley fixing plate 12 is δ / 6.

  When the movable pulley fixing plate 12 is raised by δ / 6, sag of δ / 6 also appears on each of the four ropes wound around the upper movable pulleys 13, 14, so the total amount of sag is δ / 6 × 4. = 2δ / 3. This amount of slack of 2δ / 3 must be absorbed by two ropes on both sides of the car support pulleys 3 and 4. Accordingly, the amount of absorption per rope is δ / 3, and the car 1 is lowered by δ / 3. That is, when the elongation amount generated in the lower rope is δ, the elongation amount δ is absorbed by the increase of δ / 6 of the movable pulley fixing plate 12 and the decrease of δ / 3 of the car 1.

  Thus, according to the configuration of FIG. 1, even if the rope 18 is elongated due to secular change, this elongation is caused by the lowering of the car 1 or the rising of the movable pulley fixing plate 12 and the lowering of the car 1. It is designed to be absorbed naturally. Therefore, even when the amount of elongation becomes large, the elongation cannot be absorbed as in the conventional device, and maintenance work is not required.

  FIG. 6 is a configuration diagram of an elevator apparatus according to the second embodiment of the present invention. 6 differs from FIG. 1 in that the moving pulley fixing plate 12 is attached to the side surface of the car 1 via the vibration / noise absorbing member 21. Further, the moving pulley fixing plate 12 and the vibration / noise absorption are also provided. The member 21 is displaceable in the vertical direction by the engaging means 22 that passes through the long hole 12a of the movable pulley fixing plate 12 and the long hole (not shown) of the vibration / noise absorbing member 21.

  As described above, since the movable pulley fixing plate 12 moves together with the passenger car 1 while maintaining a certain distance from the passenger car 1, in the configuration of the first embodiment of FIG. It is merely arranged on the side of the car 1 and is not attached to the car 1. However, considering the occurrence of a disaster such as an earthquake, it is structurally preferable that the movable pulley fixing plate 12 is attached to the car 1 rather than being arranged in a suspended state as shown in FIG. it is conceivable that. Therefore, in the second embodiment, the movable pulley fixing plate 12 is attached to the side surface of the car 1, but even in that case, the vibration accompanying the rotation of the moving pulley attached to the movable pulley fixing plate 12 is used. A configuration is devised so that noise is not transmitted to passengers in the car 1 as much as possible, and absorption of elongation due to aging of the rope 18 is not hindered.

  FIG. 7 is a partially enlarged view showing the engaging structure of the engaging means 22 with respect to the movable pulley fixing plate 12 and the vibration / noise absorbing member 21 in FIG.

  The engaging means 22 includes a contact plate 23, a nut 24, and a bolt 25. The nut 24 is welded on the flat surface of the contact plate 23, and the tip of the bolt 25 is a long hole 12 a from the inside of the side surface of the car 1 (the long hole of the vibration / noise absorbing member 21 is not shown). ) Is inserted and screwed into the nut 24. In addition, the width l1 of the long hole 12a is slightly larger than the diameter of the bolt 25, and the length l2 in the longitudinal direction is sufficiently longer than the amount of elongation generated due to the secular change of the rope 18. ing.

  Therefore, although the engaging means 22 is restrained from displacement in the horizontal direction, displacement in the vertical direction is allowed within the range of the length 12 of the long hole 12a. Therefore, although the movable pulley fixing plate 12 and the vibration / noise absorbing member 21 are attached to the side surface of the car 1, the absorption of the elongation due to the secular change of the rope 18 is not hindered. .

  FIG. 8 is a configuration diagram of an elevator apparatus according to the third embodiment of the present invention. FIG. 8 differs from FIG. 6 in that the upper moving pulley attached to the moving pulley fixing plate 12 is only one of the upper moving pulley 13, and the car supporting moving pulley 26, between the car supporting moving pulleys 3 and 4, 27 and the upper fixed pulley 28 are added.

  As described above, regarding the number of the moving pulleys in considering the balance with the lower moving pulleys 15 to 17, the number of moving pulleys that contribute to one turn of the rope 18 is collectively counted as one. Therefore, in the case of the configuration of FIG. 8, it can be considered that one car pulley is constituted by the car support moving pulleys 3 and 26, and the car support moving pulleys 27 and 4 and another moving pulley is constituted. it can. Therefore, the substantial total number of pulleys of the upper movable pulley 13 and the car supporting movable pulleys 3, 26 and 27, 4 is three, and the three lower movable pulleys 15 to 17 are balanced. Become.

  The tension acting on each part of the rope 18 in the configuration of FIG. 8 has been described in FIG. 2 and will not be described in detail, but can be obtained based on the same concept as described in FIG. That is, in the configuration of FIG. 1, the tension of each part of the upper rope was M / 2 and the tension of each part of the lower rope was M / 3. However, in the configuration of FIG. The tension of each part is M / 4, and the tension of each part of the lower rope is M / 12.

  Accordingly, the difference in tension between the ropes on the left and right sides of the hoisting machine 5 is (M / 4) − (M / 12) = M / 6, and the driving torque required for the hoisting machine 5 is (M / 6) · D. / 2. The value of this driving torque is the same as that of the configuration of FIG. 1 or FIG. 6, but the value of the rope tension is smaller than that of the configuration of FIG. 1 or FIG. The effect that the downward load of the added rope can be reduced can be obtained.

  The tension ratio between (M / 4) and (M / 12) is (3/1), which is the ratio of the number of upper and lower moving pulleys attached to the moving pulley fixing plate 12 ( 1/3), which is a reciprocal relationship, as described above with reference to FIG. That is, the value of the rope tension can be reduced as the number of the upper moving pulleys is reduced as compared with the number of the lower moving pulleys, and the downward load of the rope applied to the hoisting machine 5 can be greatly reduced.

  In each of the above-described embodiments, the upper moving pulley and the lower moving pulley are fixed to the moving pulley fixing plate 12. However, the moving pulley fixing plate 12 is not necessarily used, and the upper moving pulley and the lower moving pulley are not necessarily used. Other configurations can be employed as long as the positional relationship with the movable pulley can be fixed.

  For example, as shown in FIG. 9, it is possible to adopt a configuration in which the upper movable pulleys 13 and 14 are inserted between the lower movable pulleys 15 to 17 and the plurality of movable pulleys are assembled concentrically by the shaft member 29. It is.

The block diagram of the elevator apparatus which concerns on the 1st Embodiment of this invention. Explanatory drawing about the tension | tensile_strength which acts on each part of the rope in FIG. Explanatory drawing about the movement amount of the car in FIG. 1 and a moving pulley fixed board. Explanatory drawing when elongation generate | occur | produces in the upper rope in FIG. Explanatory drawing when elongation generate | occur | produces in the lower rope in FIG. The block diagram of the elevator apparatus which concerns on the 2nd Embodiment of this invention. The elements on larger scale which showed the structure of the engaging means in FIG. The block diagram of the elevator apparatus which concerns on the 3rd Embodiment of this invention. Explanatory drawing which showed the modification about the fixing structure of the upper dynamic pulley and lower dynamic pulley in FIG. The block diagram of the conventional elevator apparatus. Explanatory drawing for demonstrating the necessity of the structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Car door 3, 4 Car support moving pulley 5 Hoisting machines 6, 7 Upper fixed pulley 8-11 Lower fixed pulley 12 Moving pulley fixing plate 12a Long hole 13, 14 Upper moving pulley 15-17 Lower moving pulley 18 Rope 19 Upper fixed wall 20 Lower fixed wall 21 Vibration / noise absorbing member 22 Engaging means 23 Baffle plate 24 Nut 25 Bolts 26 and 27 Car support movable pulley 28 Upper fixed pulley 29 Shaft member

Claims (6)

A car that can be moved up and down in the hoistway,
An upper fixed pulley disposed in the upper part of the hoistway;
An upper movable pulley disposed below the upper fixed pulley;
A car support pulley arranged at the top of the car;
A lower fixed pulley disposed at a lower portion of the hoistway;
A lower movable pulley disposed above the lower fixed pulley and having a fixed positional relationship with the upper movable pulley;
One end side is attached to the upper part of the hoistway and passes through the upper moving pulley, the upper fixed pulley, and the car support moving pulley, and the other end side is attached to the lower part of the hoistway and the lower moving pulley and the lower fixed pulley. A hoisting machine that raises and lowers the car by driving the hoisting rope to be wound up,
An elevator apparatus comprising: The total number of pulleys of the upper pulley and the car support pulley is equal to the number of pulleys of the lower pulley;
The elevator apparatus according to claim 1. When there are a plurality of the car support pulleys, the number of the pulleys included in the total pulley number is one that collectively contributes to one turn of the rope.
The elevator apparatus according to claim 1 or 2. The upper moving pulley and the lower moving pulley are fixed to the same moving pulley fixing plate,
The elevator apparatus according to any one of claims 1 to 3. The movable pulley fixing plate is attached to the car via a vibration / noise absorbing member,
The elevator apparatus according to claim 4. In the movable pulley fixing plate and the vibration / noise absorbing member, a long hole having a length longer than the elongation due to the secular change of the rope is formed so as to extend in the vertical direction. The plate and the vibration / noise absorbing member are engaged with the car by engaging means for inserting the elongated hole, and can be displaced in the vertical direction within the length of the elongated hole.
The elevator apparatus according to claim 5.

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