JP2005206382A - Elevator equipment - Google Patents

Abstract

Provided is an elevator drive device that can improve ease of installation and ease of maintenance, and can maintain high reliability.
A rope 29 engaged with an elevator car 52 is wound around and a sheave 27 for moving the rope 29 by rotating and a drive device for rotating the sheave 27 are thin, and the inside of the elevator path of the elevator car 52 is thin. Because it is located at a position higher than the floor of the first floor 58, which is the lowest floor, below the hoistway and adjacent to the elevator car 52, work is not performed at high places even during installation and maintenance. Improves. In addition, the possibility of the drive device being immersed in water during water discharge is reduced, and the function is prevented from being impaired.
[Selection] Figure 2

Description

  The present invention relates to an elevator apparatus for raising and lowering an elevator car.

  In towns and the like, since the site area is often limited, a relatively tall building may be built with respect to the site area. In such a long and narrow building, an elevator is particularly necessary for going up to a higher floor, but how to install such an elevator becomes a problem. Here, the hoistway through which the elevator car passes must be provided so as to pass through each floor, but the drive device for raising and lowering the elevator car can be installed at an arbitrary position to some extent.

  If such a driving device is installed at the top of the hoistway as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-10434, the space on each floor can be effectively utilized. However, if the drive device is provided at the uppermost part of the hoistway as in this prior art, the installation work must be performed after securing a solid scaffold, and it takes time and labor to secure the scaffold. In addition, the worker needs to work in an unstable posture, and it is inconvenient because it must take measures such as preventing the fall. Furthermore, the maintenance of the drive device after installation must be performed in a state where the operator is placed on the ceiling of the elevator car, and work in an unstable posture is forced.

  On the other hand, there is also an idea of installing an elevator drive device in the basement. However, when flooding occurs due to heavy rain or rupture of water pipes, water tends to flow into the basement of the building, and the function of the drive device may be impaired when the drive unit is immersed in water.

  In view of such a problem, an object of the present invention is to provide an elevator apparatus that can improve ease of installation and ease of maintenance, and can maintain high reliability.

  To achieve the above object, an elevator apparatus according to the present invention includes a sheave that is wound with a rope engaged with an elevator car and moves the rope by rotating, and a drive device that rotates the sheave. The drive device is thin, and is disposed adjacent to the elevator car in the elevator shaft of the elevator car and at a position higher than the floor on the lowest floor below the elevator shaft.

  According to the elevator apparatus of the present invention, it has a driving device comprising a sheave that moves a rope engaged with an elevator car and moves the rope by rotating, and a driving unit that rotates the sheave, The drive unit is thin and is located adjacent to the elevator car in the hoistway and higher than the floor on the lowest floor below the hoistway, so work should be done at a high place during installation and maintenance. This improves workability. In addition, the possibility of the drive unit being immersed in water is reduced even when water is discharged, and it is possible to suppress the loss of the function as much as possible.

  Further, the drive unit includes an electric device, an input shaft rotated by the electric device and a speed reducer having the sheave as an output rotating wheel, and a brake device that applies a braking force to the input shaft. If the electric device and the brake device are arranged on the same plane in a direction perpendicular to the axial direction of the input shaft and arranged at the side end of the speed reducer, the entire drive device is arranged in the input shaft direction. Since it can be configured to be thin and compact, even when the drive device is arranged at a position higher than the floor of the lowermost floor below the hoistway, the space on the installation floor can be effectively utilized.

  According to the elevator apparatus of the present invention, it has a driving device comprising a sheave that moves a rope engaged with an elevator car and moves the rope by rotating, and a driving unit that rotates the sheave, The drive unit is thin and is located adjacent to the elevator car in the hoistway and higher than the floor on the lowest floor below the hoistway, so work should be done at a high place during installation and maintenance. This improves workability. In addition, the possibility of the drive unit being immersed in water is reduced even when water is discharged, and it is possible to suppress the loss of the function as much as possible.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of an elevator driving apparatus 1 showing an embodiment of the present invention.

  As shown in FIG. 1, the elevator driving device 1 includes an electric device 10, a speed reducer 20 that decelerates and transmits the rotation of an input shaft 21 that is rotationally driven by the electric device 10, and a brake device 30. .

  The electric device 10 includes a coil 12, a stator 13 sandwiched between the coils 12, a rotor 14 that is a ring-shaped permanent magnet, and a rotor 14 attached to the outer periphery of the housing 11 of the electric device 10. A rotating plate 15 having a central portion splined to the input shaft 21 and an encoder 16 for detecting the rotational speed of the input shaft 21 are provided. The housing 11 is attached and fixed to the support member 22 of the speed reducer 20. In the electric device 10, the energization of the coil 12 is controlled by a control unit (not shown), thereby outputting a predetermined torque.

  As shown in FIG. 1, the speed reducer 20 includes an input shaft 21 that is rotatably supported via a bearing 20 a at the center portion of the support member 22 (rotation center portion of the speed reducer), and an outer periphery of the support member 22. An output rotating wheel that is rotatably supported by a portion via a pair of bearings 27a, has a groove 28 around which the rope 29 (FIG. 2) is wound, and has a predetermined number of internal teeth on its inner periphery. As a sheave 27, a plurality of external gears 60 whose inner periphery engages with a crank portion 21a of the input shaft 21 via a bearing 20b, and a predetermined number of external teeth are formed on the outer periphery, and the support member 22. A plurality of support shafts 24 are supported at both ends 24b and 24c via bearings 24a, and a plurality of external gears 60 are supported at the crank portion 24d via bearings 24e.

  The inner teeth of the sheave 27 are composed of a plurality of pins 26 fixed to the sheave 27 and a plurality of cylindrical bodies 25 inserted into the plurality of pins 26. The support member 22 includes one disk body having a plurality of column portions 22a loosely inserted in the external gear 60 and the other disk body 22b, and both the disk bodies are coupled by bolts 22c.

  The sheave 27 rotates concentrically with respect to the input shaft 21 when the rotation of the input shaft 21 is decelerated and transmitted. In the form described later, the rope 29 is connected to an elevator car 52 (FIG. 2) and a counterweight 56 (FIG. 2), respectively, and moves the elevator car 52 up and down.

  The brake device 30 is provided with an axial groove 31a on the outer periphery, and engages with the cylindrical intermediate member 31 that is splined to the outer periphery of the input shaft 21 and the axial groove 31a. Includes a pair of brake plates 32 and 33 that are relatively movable but rotate integrally, and fixed walls 34 and 35 that are arranged on both sides in the axial direction of the brake plates 32 and 33 and are maintained fixed to the housing 11. The armatures 36 and 37 disposed between the brake plates 32 and 33 and capable of approaching or separating from the fixed walls 34 and 35, and the brake plates 32 and 33 with respect to the adjacent fixed walls 34 and 35, respectively. Spring 38 and 39 for energizing, and an electromagnet 40 fixed between the armatures 36 and 37 are provided. A rotating portion of the encoder 16 is coupled to the intermediate member 31, and a fixing portion of the encoder 16 is fixed to the inner wall of the housing 11.

  FIG. 2 is a diagram illustrating a state in which the driving device 1 of FIG. 1 is arranged in a building. The building 50 is shown with a part omitted. An elevator frame 51 is formed in a substantially box shape by a steel frame in the building 50. Along the hoistway formed in the elevator frame 51, the elevator car 52 is guided by guide rails 101 and 102 provided in the elevator frame 51 and can move up and down.

  One end of the rope 29 is attached to the attachment portion 51 a provided at the uppermost portion of the elevator frame 51. The rope 29 heading downward from the mounting portion 51b is wound around pulleys 52a and 52b provided on the lower surface of the elevator car 52 and then upwards. Further, the rope 29 is wound around the uppermost pulley 53 of the elevator frame 51 and is lowered below. Is wound around the sheave 27 of the drive device 1 and is directed upward, and is further wound around another pulley 54 at the top of the elevator frame 51 and directed downward, and is wound around a pulley 55 that supports the counterweight 56. The upper end of the elevator frame 51 is attached to an attachment portion 51 b provided at the uppermost portion of the elevator frame 51. The counterweight 56 is guided by the guide rails 103 and 104 and is movable up and down.

  As apparent from FIG. 2, the drive device 1 is attached to the subframe 51 c fixed to the elevator frame 51 in the space between the first floor 58 and the second floor 59 of the building 50 in the gap of the hoistway. It is thin and is provided below the hoistway.

  Next, drive control of the elevator elevator car 52 by the drive device 1 according to the present embodiment will be described. First, when the electric device 10 of FIG. 1 is operated by a signal from a control unit (not shown) and the input shaft 21 rotates together with the rotor 14, the external gear 60 performs an eccentric oscillating motion by the crank portion 21a of the input shaft 21. Then, the sheave 27 having the inner teeth that mesh with the outer teeth rotates at a reduced speed. Such deceleration action is well known. By rotating the sheave 27, the rope 29 wound in the groove 28 on the outer peripheral surface is driven, so that the elevator car 52 moves up and down. The rotation of the input shaft 21 is transmitted by being decelerated at a predetermined ratio by the speed reducer 20, and the sheave 27 rotates at a constant rotational speed.

  Since electric power is supplied to the electromagnet 40 of the brake device 30 while the electric device 10 is driven, the electromagnet 40 attracts the armatures 36 and 37. When the armatures 36 and 37 are sucked and moved in directions close to each other, the springs 38 and 39 are thereby pressed and contracted, and the brake plates 32 and 33 are released from the urging force of the springs 38 and 39, so that the fixed walls 34, 39 are Therefore, the intermediate member 31 is rotatable, and the state where no braking force is applied to the input shaft 21 is maintained.

  On the other hand, when the power supply from the control device (not shown) is stopped (including a power failure), the electromagnet 40 cannot attract the armatures 36 and 37, so that the braking plates 32 and 33 are strongly biased by the springs 38 and 39. Thus, it is pressed against the fixed walls 34 and 35 through the armatures 36 and 37. In this case, since a large frictional force acts between the fixed walls 34 and 35 and the braking plates 32 and 33, the braking force is applied to the input shaft 21 via the intermediate member 31 based on the frictional force. be able to. As a result, the rotation of the sheave 27 is stopped.

  Since the output rotating wheel itself of the speed reducer 20 is a sheave 27 around which the rope 29 is wound, and the electric device 10 and the brake device 30 are provided on the same plane perpendicular to the input shaft 21, compared with the conventional driving device. Thus, the input shaft 21 can be made thin in the axial direction. Thus, since the drive device 1 can be made thin, it can be disposed close to the elevator car in the hoistway between the first floor 58 and the second floor 59 of the building 50. Therefore, even during the installation and maintenance of the drive device 1, access to the installation location is easy, and work is not performed at a high place, thereby improving workability. Further, when the water is discharged, if it is provided at a position higher than the floor on the lowest floor, the risk that the drive device 1 is immersed in water is reduced, and it is possible to suppress the loss of the function as much as possible.

  As described above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, the drive device may be arranged in the hoistway as long as it does not hinder the movement of the elevator car. Moreover, the structure shown in this Embodiment is an example of a drive device, and as long as it can install in the position higher than the floor of the lowest floor below a hoistway, it is not restricted to the structure shown in Embodiment.

It is a sectional side view of the drive device for elevators which shows embodiment of this invention. It is a figure which shows the state which has arrange | positioned the drive device 1 of FIG. 1 in the building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric device 20 Reduction gear 21 Input shaft 22 Support member 25 Cylindrical body 27 Sheave 29 Rope 30 Brake device 50 Building 51 Elevator frame 52 Lifting car 56 Counterweight

Claims (2)

  A rope engaged with an elevator car is wound around and has a drive device comprising a sheave that moves the rope by rotating and a drive unit that rotates the sheave, the drive device is thin, and An elevator apparatus, wherein the elevator apparatus is disposed at a position higher than the floor of the lowest floor below the hoistway in the hoistway of the car and adjacent to the elevator car. The drive unit includes an electric device, an input shaft rotated by the electric device and a speed reducer having the sheave as an output rotating wheel, and a brake device that applies a braking force to the input shaft, The elevator apparatus according to claim 1, wherein the electric device and the brake device are arranged on the same plane in a direction perpendicular to the axial direction of the input shaft, and are arranged on a side end of the speed reducer.

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