elevator equipment

Abstract

In this elevator device, a first hoisting machine has a sheave shaft and is installed in a hoistway. A second hoisting machine has a second hoisting machine body and a second driving sheave. A suspension body is wound around the second driving sheave. A vertical load that is exerted from the suspension body on the second hoisting machine is supported by the first hoisting machine at the sheave shaft. The second hoisting machine is further equipped with a steady rest. The steady rest is in contact with the first hoisting machine and prevents the second hoisting machine body from turning about the sheave shaft with respect to the first hoisting machine.

Description

[Technical Field]

[0001] The present disclosure relates to elevator systems. [Background technology]

[0002] In conventional elevator systems, the vertical load acting on the new hoisting machine is supported by the hoistway via a wire and a sheave of the existing hoisting machine. The new hoisting machine is also connected to the guide rail via multiple rests. For example, horizontal loads acting on the new hoisting machine due to an earthquake are supported by the guide rail via multiple rests (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6020735 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional elevator system as described above, the new hoisting machine needs to be connected to the guide rail via a plurality of sway rests, which makes installation of the new hoisting machine time-consuming.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an elevator device that allows for easy installation of a second hoisting machine using a first hoisting machine. [Means for solving the problem]

[0006] The elevator device of the present disclosure comprises a first hoist installed in a hoistway and having a sheave shaft, a second hoisting machine having a second hoisting machine main body and a second drive sheave rotatable relative to the second hoisting machine main body, a suspension body wound around the second drive sheave, and a car suspended by the suspension body and raised and lowered in the hoistway by rotation of the second drive sheave, the vertical load acting on the second hoisting machine from the suspension body being supported by the first hoisting machine at the sheave shaft, and the second hoisting machine further having a sway stopper that is in contact with the first hoisting machine and prevents the second hoisting machine main body from rotating relative to the first hoisting machine around the sheave shaft. In addition, the elevator device according to the present disclosure includes a first hoist having a first hoist body installed in the elevator shaft, a sheave shaft provided on the first hoist body, and a first hoist brake provided on the first hoist body, a second hoist having a second hoist body fixed to the sheave shaft and a second drive sheave rotatable relative to the second hoist body, a suspension body wrapped around the second drive sheave, and a car suspended by the suspension body and raised and lowered in the elevator shaft by the rotation of the second drive sheave, and the vertical load acting on the second hoist from the suspension body is supported by the first hoist at the sheave shaft, and the rotation of the sheave shaft is prevented by the first hoist brake. In addition, the elevator device of the present disclosure comprises a first hoist installed at the bottom of the elevator shaft and having a rotating body, a second hoist having a second hoist body and a second drive sheave rotatable relative to the second hoist body, a suspension body wound around the second drive sheave, and a car suspended by the suspension body and moving up and down in the elevator shaft by the rotation of the second drive sheave, the vertical load acting on the second hoist from the suspension body being supported by the first hoist at the rotating body, and the second hoist further has a frame body to which the second hoist body is attached, and because the frame body is in contact with the bottom, the second hoist body is prevented from rotating relative to the first hoist around the rotating body. [Effects of the Invention]

[0007] According to the elevator apparatus of the present disclosure, the second hoisting machine can be easily installed using the first hoisting machine. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an elevator apparatus according to a first embodiment. [Figure 2] FIG. 2 is a front view showing the main parts of the elevator apparatus before repair. [Figure 3] FIG. 2 is a side view showing the first hoist and the second hoist of FIG. 1. [Figure 4] FIG. 4 is a side view showing the second hoist of FIG. 3 separated from the first hoist. [Figure 5] FIG. 2 is a front view showing the first hoist and the second hoist of FIG. 1. [Figure 6] FIG. 4 is a front view showing the second hoist of FIG. 3 separated from the first hoist. [Figure 7] FIG. 10 is a side view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a second embodiment. [Figure 8] FIG. 10 is a front view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a third embodiment. [Figure 9] FIG. 10 is a front view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a fourth embodiment. [Figure 10] FIG. 10 is a diagram showing the second hoist separated from the first hoist in FIG. 9. [Figure 11] FIG. 10 is a front view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a fifth embodiment. [Figure 12] FIG. 13 is a perspective view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a sixth embodiment. [Figure 13] FIG. 13 is a side view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to a seventh embodiment. [Figure 14] FIG. 13 is a front view showing a first hoisting machine and a second hoisting machine of an elevator apparatus according to an eighth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1 1 is a perspective view showing an elevator apparatus according to embodiment 1, showing the elevator apparatus after renovation. In the figure, a first car guide rail 2, a second car guide rail 3, a first counterweight guide rail 4, and a second counterweight guide rail 5 are installed in an elevator shaft 1.

[0010] A first hoisting machine 6 is installed at the bottom 1a of the elevator shaft 1. The first hoisting machine 6 is the existing hoisting machine that was in use before the renovation. The first hoisting machine 6 is fixed to the floor surface of the bottom 1a by a plurality of anchor bolts (not shown) via fixing members (not shown).

[0011] The first hoist 6 is a gearless hoist that uses a permanent magnet motor. The first hoist 6 is a long-bodied cylindrical hoist. A long-bodied cylindrical hoist is a hoist whose axial dimension is greater than the dimension perpendicular to the axial direction.

[0012] A second hoist 7 is attached to the first hoist 6. The second hoist 7 is a new hoist that will be used after the renovation. The second hoist 7 is a gearless hoist that uses a permanent magnet motor. The second hoist 7 is a thin hoist. A thin hoist is a hoist whose axial dimension is smaller than the dimension in the direction perpendicular to the axial direction.

[0013] The second hoisting machine 7 has a second hoisting machine main body 71 and a second drive sheave 72. The second drive sheave 72 is rotatable relative to the second hoisting machine main body 71.

[0014] A suspension body 10 is wound around the second drive sheave 72. As the suspension body 10, a plurality of ropes or a plurality of belts is used.

[0015] The car 11 and the counterweight 12 are suspended by the suspension body 10. The car 11 and the counterweight 12 move up and down in the hoistway 1 as the second drive sheave 72 rotates.

[0016] A first car sheave 13 and a second car sheave 14 are provided below the car 11. A counterweight sheave 15 is provided above the counterweight 12.

[0017] A support frame 16 is installed at the top of the hoistway 1. A first return pulley 17, a second return pulley 18, and a third return pulley 19 are supported on the support frame 16.

[0018] The suspension 10 has a first end 10a and a second end 10b, which are connected to a support frame 16, respectively.

[0019] The suspension body 10 is wound around, in order from the first end 10a side, the first car hoisting sheave 13, the second car hoisting sheave 14, the first return sheave 17, the second return sheave 18, the second drive sheave 72, the third return sheave 19, and the counterweight hoisting sheave 15.

[0020] The elevator system of the first embodiment is a machine room-less elevator of the 2:1 roping system. A vertically upward load acts on the second hoisting machine 7 from the suspension body 10 due to the weight of the car 11 and the weight of the counterweight 12.

[0021] Fig. 2 is a front view showing the main parts of the elevator apparatus before the renovation. Fig. 3 is a side view showing the first hoisting machine 6 and the second hoisting machine 7 of Fig. 1. Fig. 4 is a side view showing the second hoisting machine 7 of Fig. 3 separated from the first hoisting machine 6. Fig. 5 is a front view showing the first hoisting machine 6 and the second hoisting machine 7 of Fig. 1. Fig. 4 is a front view showing the second hoisting machine 7 of Fig. 3 separated from the first hoisting machine 6.

[0022] The first hoisting machine 6 before renovation has a first hoisting machine body 61, a sheave shaft 62, and a first drive sheave 63. The first hoisting machine body 61 has a first hoisting machine motor (not shown). In the first hoisting machine 6 before renovation, the first drive sheave 63 is fixed to the sheave shaft 62. Furthermore, the sheave shaft 62 and the first drive sheave 63 are rotated by the first hoisting machine motor. When the elevator device is renovated, the first drive sheave 63 is removed from the sheave shaft 62.

[0023] A fitting hole 71a is provided in the second hoisting machine body 71. The sheave shaft 62 is inserted into the fitting hole 71a. The second hoisting machine body 71 is fixed to the sheave shaft 62 by a fixing method similar to the fixing method of the first drive sheave 63 to the sheave shaft 62.

[0024] As a result, the second drive sheave 72 is disposed directly above the sheave shaft 62. The second drive sheave 72 is also disposed directly above the position of the first drive sheave 63 before it was removed. The vertically upward load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62.

[0025] Although not shown in FIG. 1, the second hoist 7 further has a sway rest 73. The sway rest 73 has a pair of protrusions 74. The pair of protrusions 74 protrude from the second hoist main body 71 toward the first hoist main body 61. Furthermore, each protrusion 74 is screwed into a screw hole provided in the second hoist main body 71.

[0026] Additionally, the pair of protrusions 74 are in contact with the first hoisting machine body 61 and sandwich the first hoisting machine body 61. As a result, the pair of protrusions 74 prevent the second hoisting machine body 71 from rotating relative to the first hoisting machine 6 around the sheave shaft 62. Each protrusion 74 is in contact with the outer surface of a leg of the first hoisting machine body 61. The outer surface of the leg is a vertical plane.

[0027] When attaching a new second hoist 7 to an existing first hoist 6, the existing suspension body 10 is removed with the car 11 and counterweight 12 supported in the hoistway 1. Then, the first drive sheave 63 is removed from the sheave shaft 62.

[0028] Thereafter, the sheave shaft 62 is inserted into the fitting hole 71a, and the second hoist 7 is attached to the sheave shaft 62. Then, the newly installed suspension body 10 is wound around the first car hoisting sheave 13, the second car hoisting sheave 14, the first return sheave 17, the second return sheave 18, the second drive sheave 72, the third return sheave 19, and the counterweight hoisting sheave 15.

[0029] In such an elevator device, the vertical load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62. In addition, the sway stopper 73 is in contact with the first hoisting machine main body 61 and prevents the second hoisting machine main body 71 from rotating relative to the first hoisting machine 6 around the sheave shaft 62.

[0030] Therefore, compared to connecting the second hoist 7 to the first counterweight guide rail 4 that is distant from the second hoist 7, the installation of the second hoist 7 using the first hoist 6 can be easily carried out. In other words, the installation of the second hoist 7, which is a new hoist, can be easily carried out. This makes it possible to shorten the period of the renovation work and reduce the number of parts.

[0031] Furthermore, even if a horizontal load acts on the second hoisting machine 7 during an earthquake, for example, the steady rest 73 can suppress rotation of the second hoisting machine main body 71.

[0032] In addition, the time and effort required to remove the first hoist 6, which is an existing hoist, can be eliminated.

[0033] In addition, the second hoisting machine 7 can be easily fixed to the hoistway 1 by utilizing the fixing structure of the first hoisting machine 6 to the hoistway 1 .

[0034] In addition, the steady rest 73 has a pair of protrusions 74. Therefore, with a simple configuration, it is possible to prevent the second hoisting machine 7 from rotating relative to the first hoisting machine 6.

[0035] Embodiment 2 Next, Fig. 7 is a side view showing the first hoisting machine 6 and the second hoisting machine 7 of an elevator device according to embodiment 2. In embodiment 2, a connecting member 8 is connected to the first hoisting machine 6 and the second hoisting machine 7. The connecting member 8 prevents movement of the second hoisting machine 7 relative to the first hoisting machine 6 in the axial direction of the first hoisting machine 6. The axial direction of the first hoisting machine 6 is the direction along the axis of the sheave shaft 62, which is the left-right direction in Fig. 7.

[0036] Other configurations in the second embodiment are the same as those in the first embodiment.

[0037] In such an elevator device, the second hoisting machine 7 is connected to the first hoisting machine 6 by a connecting member 8. Therefore, even if a horizontal load in the axial direction of the first hoisting machine 6 acts on the second hoisting machine 7 during an earthquake, for example, movement of the second hoisting machine 7 relative to the first hoisting machine 6 can be more reliably prevented.

[0038] Embodiment 3 Next, Fig. 8 is a front view showing the first hoisting machine 6 and the second hoisting machine 7 of the elevator device according to embodiment 3. In embodiment 3, the first hoisting machine 6 and the second hoisting machine 7 are arranged at the top of the elevator shaft 1.

[0039] A machine base 21 is installed at the top of the elevator shaft 1. A first hoisting machine 6 is installed on the machine base 21. A second hoisting machine 7 is attached to the first hoisting machine 6 upside down compared to the first embodiment. A vertically downward load acts on the second hoisting machine 7 from the suspended body 10 due to the weight of the car 11 and the weight of the counterweight 12.

[0040] The second drive sheave 72 is disposed directly below the sheave shaft 62. The second drive sheave 72 is disposed directly below the position of the first drive sheave 63 before it was removed. The vertically downward load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62.

[0041] Other configurations in the third embodiment are the same as those in the second embodiment.

[0042] With this configuration, the same effects as those of the first embodiment can be obtained.

[0043] Embodiment 4 Next, Fig. 9 is a front view showing the first hoisting machine 6 and the second hoisting machine 7 of an elevator apparatus according to embodiment 4. Fig. 10 is a view showing the second hoisting machine 7 separated from the first hoisting machine 6 of Fig. 9.

[0044] Although omitted in the first embodiment, the first hoist 6 further has a first hoist brake 64. The first hoist brake 64 is provided on the first hoist main body 61. In the first hoist 6 before the modification, the first hoist brake 64 keeps the sheave shaft 62 and the first drive sheave 63 stationary. In the first hoist 6 after the modification, the rotation of the sheave shaft 62 is prevented by the first hoist brake 64.

[0045] The first hoist brake 64 has a brake rotating member, a brake pad, and a brake spring. The brake rotating member is fixed to the sheave shaft 62. The brake rotating member may be, for example, a brake drum or a brake disc. The brake spring presses the brake pad against the brake rotating member, thereby preventing the brake rotating member from rotating.

[0046] In order to more reliably prevent rotation of the sheave shaft 62, the spring force of the brake spring may be increased or the brake pads may be fixed to the brake rotating member. Methods for fixing the brake pads to the brake rotating member include welding or adhesive bonding, for example.

[0047] A first key groove 62a is provided on the sheave shaft 62. A second key groove 71b is provided on the second hoisting machine body 71. The second key groove 71b opens into the fitting hole 71a. A key 9 is inserted into the first key groove 62a and the second key groove 71b.

[0048] This prevents the second hoisting machine body 71 from rotating relative to the sheave shaft 62. That is, the rotation of the second hoisting machine body 71 relative to the sheave shaft 62 is prevented by a key structure. The key structure is a structure in which a key 9 is inserted into the first key groove 62a and the second key groove 71b.

[0049] The steady rest 73 in the first embodiment is not used in the fourth embodiment. Other configurations in the fourth embodiment are the same as those in the first embodiment.

[0050] When attaching a new second hoist 7 to an existing first hoist 6, the existing suspension body 10 is removed with the car 11 and counterweight 12 supported in the hoistway 1. Then, the first drive sheave 63 is removed from the sheave shaft 62.

[0051] Thereafter, the sheave shaft 62 is inserted into the fitting hole 71a, and the second hoist 7 is attached to the first hoist 6. Then, the key 9 is inserted into the first key groove 62a and the second key groove 71b. In addition, the first hoist brake 64 prevents the sheave shaft 62 from rotating.

[0052] After this, the newly installed suspension body 10 is wound around the first car hoisting sheave 13, the second car hoisting sheave 14, the first return sheave 17, the second return sheave 18, the second drive sheave 72, the third return sheave 19, and the counterweight hoisting sheave 15.

[0053] In such an elevator device, the vertical load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62. In addition, the second hoisting machine main body 71 is fixed to the sheave shaft 62, and the rotation of the sheave shaft 62 is prevented by the first hoisting machine brake 64.

[0054] Therefore, compared to connecting the second hoist 7 to the first counterweight guide rail 4 that is distant from the second hoist 7, the installation of the second hoist 7 using the first hoist 6 can be easily carried out. In other words, the installation of the second hoist 7, which is a new hoist, can be easily carried out. This makes it possible to shorten the period of the renovation work and reduce the number of parts.

[0055] Furthermore, even if a horizontal load acts on the second hoisting machine 7 during an earthquake, for example, the first hoisting machine brake 64 can suppress rotation of the second hoisting machine main body 71.

[0056] In addition, the time and effort required to remove the first hoist 6, which is an existing hoist, can be eliminated.

[0057] In addition, the second hoisting machine 7 can be easily fixed to the hoistway 1 by utilizing the fixing structure of the first hoisting machine 6 to the hoistway 1 .

[0058] Furthermore, the rotation of the second hoisting machine body 71 relative to the sheave shaft 62 is prevented by a key structure. Therefore, the rotation of the second hoisting machine body 71 relative to the sheave shaft 62 can be prevented with a simple configuration.

[0059] Furthermore, by fixing the brake pad to the brake rotation member, rotation of the second hoisting machine body 71 relative to the sheave shaft 62 can be prevented more reliably.

[0060] The rotation prevention structure of the second hoisting machine body 71 relative to the sheave shaft 62 is not limited to the key structure.

[0061] Embodiment 5. Next, Fig. 11 is a front view showing the first hoisting machine 6 and the second hoisting machine 7 of an elevator device according to embodiment 5. In embodiment 5, the first hoisting machine 6 and the second hoisting machine 7 are arranged at the top of the elevator shaft 1.

[0062] A machine base 21 is installed at the top of the elevator shaft 1. The first hoist 6 is installed on the machine base 21. The second hoist 7 is attached to the first hoist 6 upside down compared to the fourth embodiment. A vertically downward load acts on the second hoist 7 from the suspended body 10 due to the weight of the car 11 and the weight of the counterweight 12.

[0063] The second drive sheave 72 is disposed directly below the sheave shaft 62. The second drive sheave 72 is disposed directly below the position of the first drive sheave 63 before it was removed. The vertically downward load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62.

[0064] Other configurations in the fifth embodiment are the same as those in the fourth embodiment.

[0065] With this configuration, the same effects as those of the fourth embodiment can be obtained.

[0066] The first hoist 6 and the second hoist 7 in the third to fifth embodiments may be connected to the connecting member 8 shown in the second embodiment.

[0067] Embodiment 6 Next, FIG. 12 is a perspective view showing a first hoisting machine 6 and a second hoisting machine 7 of an elevator apparatus according to a sixth embodiment.

[0068] The second hoist 7 in the sixth embodiment has a second hoist main body 71, a second drive sheave 72, and a frame body 75. The second hoist main body 71 is attached to the frame body 75.

[0069] The frame body 75 has a pair of vertical pillars 76, a pair of fixing members 77, and a backing plate 78. The pair of vertical pillars 76 are arranged at a distance from each other. The second hoisting machine body 71 is fixed to the middle part of the pair of vertical pillars 76 in the up-down direction.

[0070] Each fixing member 77 is fixed between a pair of vertical pillars 76 above the second hoisting machine body 71. The backing plate 78 is fixed between the pair of vertical pillars 76 below the second hoisting machine body 71.

[0071] An arc-shaped receiving groove 78a is provided on the upper surface of the backing plate 78. A part of the sheave shaft 62 is inserted into the receiving groove 78a. The vertically upward load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62. The rotating body in the sixth embodiment is the sheave shaft 62.

[0072] The lower end of each vertical pillar 76 is in contact with the floor surface of the bottom portion 1 a. Because the frame body 75 is in contact with the floor surface of the bottom portion 1 a, the second hoisting machine body 71 is prevented from rotating relative to the first hoisting machine 6 around the sheave shaft 62.

[0073] The steady rest 73 in the first embodiment is not used in the sixth embodiment. Other configurations in the sixth embodiment are the same as those in the first embodiment.

[0074] When attaching a new second hoist 7 to an existing first hoist 6, the existing suspension body 10 is removed with the car 11 and counterweight 12 supported in the hoistway 1. Then, the first drive sheave 63 is removed from the sheave shaft 62.

[0075] Thereafter, the second hoisting machine 7 is placed on the floor surface of the bottom portion 1a, and a part of the sheave shaft 62 is inserted into the receiving groove 78a.

[0076] After this, the newly installed suspension body 10 is wound around the first car hoisting sheave 13, the second car hoisting sheave 14, the first return sheave 17, the second return sheave 18, the second drive sheave 72, the third return sheave 19, and the counterweight hoisting sheave 15.

[0077] In such an elevator device, the vertical load acting on the second hoisting machine 7 from the suspension body 10 is supported by the first hoisting machine 6 at the sheave shaft 62. In addition, since the frame body 75 is in contact with the bottom 1a, the second hoisting machine main body 71 is prevented from rotating relative to the first hoisting machine 6 around the sheave shaft 62.

[0078] Therefore, compared to connecting the second hoist 7 to the first counterweight guide rail 4 that is distant from the second hoist 7, the installation of the second hoist 7 using the first hoist 6 can be easily carried out. In other words, the installation of the second hoist 7, which is a new hoist, can be easily carried out. This makes it possible to shorten the period of the renovation work and reduce the number of parts.

[0079] Furthermore, even if a horizontal load acts on the second hoisting machine 7 during an earthquake, for example, the frame body 75 can suppress rotation of the second hoisting machine main body 71.

[0080] In addition, the time and effort required to remove the first hoist 6, which is an existing hoist, can be eliminated.

[0081] In addition, the second hoist 7 can be easily installed in the hoistway 1 by utilizing the fixing structure of the first hoisting machine 6 in relation to the hoistway 1 .

[0082] Embodiment 7 Next, Fig. 13 is a side view showing the first hoisting machine 6 and the second hoisting machine 7 of an elevator apparatus according to embodiment 7. In embodiment 7, a connecting member 8 is connected to the first hoisting machine 6 and the second hoisting machine 7. The connecting member 8 is connected to the first hoisting machine main body 61 and the vertical column 76. The connecting member 8 prevents movement of the second hoisting machine 7 relative to the first hoisting machine 6 in the axial direction of the first hoisting machine 6.

[0083] Other configurations in the seventh embodiment are the same as those in the sixth embodiment.

[0084] In such an elevator device, the second hoisting machine 7 is connected to the first hoisting machine 6 by a connecting member 8. Therefore, even if a horizontal load in the axial direction of the first hoisting machine 6 acts on the second hoisting machine 7 during an earthquake, for example, movement of the second hoisting machine 7 relative to the first hoisting machine 6 can be more reliably prevented.

[0085] Embodiment 8 Next, Fig. 14 is a front view showing the first hoisting machine 6 and the second hoisting machine 7 of an elevator apparatus according to embodiment 8. In embodiment 8, the size of the receiving groove 78a is larger than that in embodiment 6. In addition, the first drive sheave 63 remains fixed to the sheave shaft 62 even after the repair. A part of the first drive sheave 63 is inserted into the receiving groove 78a.

[0086] The vertically upward load acting on the second hoist 7 from the suspended body 10 is supported by the first hoist 6 at the first drive sheave 63. The rotating body in the eighth embodiment is the first drive sheave 63.

[0087] Other configurations in the eighth embodiment are the same as those in the sixth or seventh embodiment.

[0088] Even with this configuration, it is possible to obtain the same effects as in embodiment 6. Furthermore, since the first drive sheave 63 is not removed from the sheave shaft 62, the effort required for repair work can be further reduced.

[0089] In the sixth to eighth embodiments, a second hoisting machine body 71 provided with a fitting hole 71a may be used, as in the first embodiment. [Explanation of symbols]

[0090] 1 elevator shaft, 1a bottom, 6 first hoist, 7 second hoist, 8 connecting member, 9 key, 10 suspension body, 11 cage, 61 first hoist body, 62 sheave shaft (rotating body), 62a first keyway, 63 first drive sheave (rotating body), 64 first hoist brake, 71 second hoist body, 71b second keyway, 72 second drive sheave, 73 sway stop, 74 protrusion, 75 frame body.

Claims

1. a first hoisting machine installed in the hoistway and having a sheave shaft; a second hoist having a second hoist body and a second drive sheave rotatable relative to the second hoist body; a suspension body wound around the second drive sheave; and A car is suspended by the suspension body and moves up and down in the elevator shaft by rotation of the second drive sheave. Equipped with a vertical load acting on the second hoist from the suspension body is supported by the first hoist at the sheave shaft, The second hoisting machine further includes a sway rest, The sway rest is in contact with the first hoist and prevents the second hoist body from rotating relative to the first hoist around the sheave shaft.

2. The steady rest is A pair of protruding portions protruding from the second hoist body and sandwiching the first hoist 2. The elevator system of claim 1, further comprising:

3. a first hoist having a first hoist body installed in a hoistway, a sheave shaft provided on the first hoist body, and a first hoist brake provided on the first hoist body; a second hoist having a second hoist body fixed to the sheave shaft and a second drive sheave rotatable relative to the second hoist body; a suspension body wound around the second drive sheave; and A car is suspended by the suspension body and moves up and down in the elevator shaft by rotation of the second drive sheave. Equipped with a vertical load acting on the second hoist from the suspension body is supported by the first hoist at the sheave shaft, An elevator apparatus in which rotation of the sheave shaft is prevented by the first hoisting machine brake.

4. 4. The elevator apparatus according to claim 3, wherein rotation of the second hoist body relative to the sheave shaft is prevented by a key structure in which a key is inserted into a key groove.

5. the first hoisting machine brake has a brake rotating member and a brake pad, 5. The elevator apparatus according to claim 3, wherein the brake pad is fixed to the brake rotating member.

6. 5. The elevator apparatus according to claim 1, wherein the first hoisting machine and the second hoisting machine are disposed at a bottom or a top of the hoistway.

7. a first hoisting machine installed at the bottom of the hoistway and having a rotating body; a second hoist having a second hoist body and a second drive sheave rotatable relative to the second hoist body; a suspension body wound around the second drive sheave; and A car is suspended by the suspension body and moves up and down in the elevator shaft by rotation of the second drive sheave. Equipped with a vertical load acting on the second hoist from the suspension body is supported by the first hoist at the rotating body, The second hoisting machine is A frame body to which the second hoisting machine body is attached and An elevator device in which the frame body is in contact with the bottom portion, thereby preventing the second hoist body from rotating relative to the first hoist around the rotating body.

8. 8. The elevator apparatus according to claim 7, wherein the rotating body is a first drive sheave.

9. a connecting member connected to the first hoist and the second hoist, and preventing movement of the second hoist relative to the first hoist in the axial direction of the first hoist; The elevator system according to any one of claims 1 to 4, 7 and 8, further comprising:

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