JP2004001917A - Rope type elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a smooth rotation of a driving sheave using a flat rope made of resin and to realize a thin winding-up mechanism. <P>SOLUTION: In the rope type elevator device, the other end side of a main rope of which one end is connected to an elevator car 1 is wound on a driving sheave 8 of a winding-up mechanism 2 and the elevator car is lifted in a hoistway by normally and reversely rotating/driving the winding-up mechanism. The main rope is constituted by a flat rope 3 having a flat cross section made of a synthetic resin and the driving sheave is formed to a thin bobbin shape. The flat rope is wound on a winding body part 8a of the driving sheave in the superposing/winding state. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rope-type elevator apparatus that moves people and luggage up and down, and more particularly to a rope-type elevator apparatus that uses a flat rope as a main rope in a winding type winding mechanism.
[0002]
[Prior art]
As is well known, the main rope that links an elevator car and a hoisting mechanism that moves up and down in the hoistway of a rope type elevator device is generally a seal type or a filler type by a strand configuration, or a twist, depending on the strength of the strand, etc. They are classified into various categories, and all of them have a substantially circular (round) cross section in which a plurality of steel wires are woven from the relationship between the strength and the contact area with the drive sheave.
[0003]
That is, conventionally, for example, a round main rope is wound around a drive sheave of a winding type hoisting mechanism, and the drive motor of the hoisting mechanism is driven forward and reverse to rotate the drive sheave forward and reverse. The main ropes are sequentially wound or unwound to raise and lower the elevator car via a turning pulley or the like.
[0004]
[Problems to be solved by the invention]
However, in the conventional rope type elevator apparatus, in order to raise and lower the elevator car as shown in FIG. 9, when the main rope 22 is wound around the cylindrical sheave main body 21a of the drive sheave 21, Even if the main rope 22 is wound neatly at first, there is a possibility that as the winding progresses, the main rope 22 is unbalancedly wound around, for example, one of the flange portions 21b in the axial direction of the sheave main body 21a.
[0005]
As a result, the main rope 22 may be entangled or may be detached from the flange 21b on one side of the drive sheave 21 in some cases.
[0006]
Further, as shown in FIG. 10, even if the entire main rope 22 is wrapped neatly around the outer periphery of the sheave main body 21a, the wrapped portion 22a is first placed due to the tension applied to the main rope 22 during winding. There is a possibility that the main ropes 22b and 22c may be wound around and be parallel and may enter between some of the main ropes 22b and 22c. For this reason, when the film is rewound again, not only may the trapped portion 22c be caught and the smooth rewinding action be hindered, but also the caught portion 22a is damaged and durability is reduced. This leads to various technical problems.
[0007]
In view of the above, the present invention provides a rope elevator apparatus that can solve the technical problems in conventional winding and rewinding by using a flat rope as a main rope and applying the flat rope to a winding drum type winding mechanism. To provide.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is that the other end of the main rope having one end connected to the elevator car is wound around a drive sheave of a hoisting mechanism, and the hoisting mechanism is driven forward and reverse to rotate the elevator car. A rope-type elevator device that moves up and down in a hoistway, wherein the main rope is formed by a flat rope having a flat cross section, the drive sheave is formed to be thin, and the flat rope is provided by the drive sheave. It is characterized by being wound around the winding drum in a lap winding state.
[0009]
The invention according to claim 2 is characterized in that a drive motor of the hoisting mechanism is provided inside the drive sheave.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, each embodiment of the rope type elevator apparatus according to the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 shows a rope-type elevator apparatus according to a first embodiment of the present invention. An elevator car 1 is provided inside a hoistway so as to be able to move up and down via a guide rail (not shown), and an upper part of the hoistway. A lifting mechanism 2 disposed in a machine room of the vehicle, one end 3a of which is locked to the upper end of the elevator car 1 via a car frame 4 and the other end of which is wound around the lifting mechanism 2 and is freely deformable. And mainly three flat ropes 3 having a flat shape.
[0012]
The elevator car 1 has a box shape, a car door is provided on a front surface, and the rectangular metal car frame 4 is attached to an outer periphery. The car frame 4 includes a lower frame portion 4b (not shown) that supports the lower surface of the bottom wall 1a of the elevator car 1, and plate-like side frames that stand on both sides of the elevator car 1 from both ends of the lower frame portion 4b. And a horizontal upper frame portion 4a coupled to both upper ends of the side frame portions.
[0013]
As shown in FIGS. 1 to 3, the hoisting mechanism 2 is attached to a position above the elevator car 1 in a hoistway or via a predetermined support member fixed to an elevator machine room. A drive motor 6 whose rotation is controlled by a mechanism, a drive sheave 8 attached to a drive shaft 7 of the drive motor 6 and wound with the flat rope 3, and protruding from an end of the drive sheave 8. And a bearing (not shown) that supports the distal end of the drive shaft 7.
[0014]
The drive sheave 8 is formed in a triple shape in accordance with the number of the flat ropes 3, and has three cylindrical winding drum portions 8a, and guide flanges provided integrally on both sides of the winding drum portions 8a. The width of each winding drum portion 8a, that is, the width between the opposed flange portions 8b is formed to be slightly larger than the width of each flat rope 3. Therefore, a relatively narrow annular groove is formed between the flange portions 8b, and the radial size of each flange portion 8b is equal to the length of the flat rope 3 wound around the winding drum portion 8a. That is, it is determined according to the amount of vertical movement of the elevator car 1. The other end of the flat rope 3 is locked to the winding drum 8a.
[0015]
Each of the flat ropes 3 is formed in a band shape, and a plurality of bundles of a plurality of bundled metal fiber materials are buried in a longitudinal direction in a flat main body made of a synthetic resin. It is designed by calculation in advance. The width of each flat rope 3 is, for example, about 30 mm, and the thickness is set to about 3 mm. On the outer peripheral surface of each flat rope 3, a shallow narrow groove is formed along the width direction in order to secure flexible bending deformation.
[0016]
Therefore, according to this embodiment, by driving the drive motor 6 in the forward / reverse rotation, the drive sheave 8 rotates in the forward / reverse direction to wind up or down each flat rope 3 to raise or lower the elevator car 1. At the time of this hoisting, the flat ropes 3 are sequentially wound around each winding drum portion 8a of the drive sheave 8 as shown in FIG.
[0017]
For this reason, each flat rope 3 is neatly overlapped and wound around the outer periphery of the winding drum portion 8a while being guided by the inner surfaces of the opposite side flange portions 8b, 8b. Technical problems such as winding around one end of the portion 8a are eliminated. Accordingly, the winding and rewinding operations of the flat rope 3 with respect to the drive sheave 8 are extremely smooth, and the elevator car 1 can be smoothly moved up and down.
[0018]
Moreover, since the flat rope 3 can be wound many times around the winding drum 8a, it can be sufficiently applied to a high-rise building having a long hoistway.
[0019]
That is, if the outer diameter of the winding drum 8a is d1, the maximum winding diameter of the winding drum 8a via both flanges 8b, 8b is d2, and the thickness of the flat rope 3 is T, the driving rope The length L of the flat rope 3 on which the car 8 can be wound is determined by the following equation.
[0020]
L ⁼ a ^{(d2 2 -d9) × π /} 4 × 1 / T × 1400 (m).
[0021]
Therefore, for example, if d1 = 300 mm and d2 = 600 mm, L = 70.6 m, and if d1 = 600 mm and d2 = 800 mm, L = 73.3 m. Therefore, it can be easily applied to a high-rise building exceeding 20 floors.
[0022]
Further, for example, if d1 = 600 mm and d2 = 800 mm, L = 282.7 m, so that it can be applied to a so-called skyscraper.
[0023]
On the other hand, if d1 is reduced, d2 can be reduced, so that it is of course possible to sufficiently cope with a small-sized elevator device. Since d1 can be made sufficiently small, it is advantageous for miniaturization.
[0024]
As described above, when the flat rope 3 is wound around the drive sheave 8, the winding diameter increases accordingly, so that the driving speed of the drive motor 6 is controlled to operate at a constant speed. It is necessary, but this can be accommodated by known control mechanisms.
[0025]
In addition, if the outer diameter d1 of the winding drum 8 is increased, the difference between d1 and d2 can be reduced, so that there is an advantage that the rate of change in speed can be suppressed when controlling the rotation speed of the drive motor 6.
[0026]
In this embodiment, three flat ropes 3 are used. However, the number of flat ropes is not limited to three, and two flat ropes can be used if the elevator apparatus is small. You may set it in a book.
[0027]
FIG. 4 shows a second embodiment of the present invention, in which a hoisting mechanism 2 is disposed in a pit chamber below a hoistway.
[0028]
That is, the hoisting mechanism 2 is arranged and fixed on a support member (not shown) fixed to the bottom wall of the pit chamber. The basic structure of the drive motor 6, the drive sheave 8 and the like is the same as in the first embodiment. Similarly, the flat ropes 3 are set to two parallel ropes, and the winding drum portion 8a is formed in two rows corresponding to the two flat ropes 3.
[0029]
In addition, turning pulleys 9 and 10 are provided on the hoistway above the drive sheave 8 and above the elevator car 1, respectively. Each of the diverting pulleys 9 and 10 is formed in a double row in correspondence with the driving sheave 8.
[0030]
Other configurations such as the shape and structure of the flat rope 3 are the same as those of the first embodiment. Therefore, in this embodiment, the same operation and effects as those of the above-described first embodiment can be obtained, and the flat rope 3 can be more flexibly deformed than the conventional round rope. The diameter can be reduced. As a result, the installation space above the hoistway of each of the diverting pulleys 9 and 10 can be reduced.
[0031]
As the roping mode of the flat rope 3, in addition to the above-described embodiments, for example, as shown in FIG. 5, turning pulleys 11 and 12 are provided at left and right positions above the elevator car 1, and a plurality of flat ropes 3 Can be extended from the hoist mechanism 2 in the pit chamber via the deflecting pulleys 11 and 12 to lock the one end 3a at both ends of the upper frame 4a of the elevator car 1. is there. With this configuration, the support points for the elevator car 1 can be dispersed, so that the elevator car 1 can be stably moved up and down.
[0032]
As another roping configuration, as shown in FIG. 6, one end 3a of each flat rope 3 is connected to the bottom of the elevator car 1 via each of the turning pulleys 11 and 12, as shown in FIG. It is also possible to engage with both protruding ends 4c, 4c of the lower frame portion 4b disposed in the center of the bottom surface of the wall 1a in the lateral direction. Further, as shown in FIG. 7, one end 3a of the flat rope 3 may be locked to one protruding end 4c of the lower frame 4b via one turning pulley 11.
[0033]
Further, as shown in FIG. 8, a drive motor 6 may be integrally provided inside the drive sheave 8 of the hoisting mechanism 2. That is, the drive motor 6 is of an outer rotor type, in which an electric stator 13 having a three-phase slot with several poles is arranged and fixed inside a winding drum portion 8a, and an inner periphery of the winding drum portion 8a is fixed. On the surface, annular permanent magnets 15 and 16 facing the outer peripheral surface of the electric stator 13 with a constant air gap 14 are fixed. The stator 13 includes an iron core radially attached to a hub (not shown) and a coil wound around the iron core. On the other hand, the permanent magnets 15 and 16 are arranged so that the adjacent magnetic poles (N, S) are alternately different from each other, and drive the drive sheave 8 in forward and reverse rotation according to the current flowing through each coil of the stator 13. It is made to let.
[0034]
Therefore, since the drive motor 6 is disposed inside the winding drum 8a, the entire hoisting mechanism 2 can be further reduced in thickness, and the installation space of the hoisting mechanism 2 in the hoistway is flattened. Combined with the use of the rope 3, the size can be made sufficiently small.
[0035]
The present invention is not limited to the configuration of each of the above embodiments, and the structure can be appropriately changed according to conditions such as the specification and size of the elevator. For example, as described above, the winding of the drive sheave 8 It is possible to arbitrarily change the outer diameter of the trunk portion 8a, or arbitrarily change the width and thickness of the flat rope 3, the number of the flat ropes 3, and the locking positions.
[0036]
【The invention's effect】
As apparent from the above description, according to the first aspect of the present invention, the main rope is formed of a flat rope having a flat cross section instead of the conventional steel round rope, and the drive sheave is used. And the flat rope is wound around the bobbin of the drive sheave in an overlapping manner, so that the flat rope can be very smoothly wound and unwound with respect to the drive sheave, and the elevator car can be raised and lowered. Can be done smoothly.
[0037]
In addition, since the flat rope can be wound many times around the winding drum, it can be sufficiently applied to a high-rise building having a long hoistway.
[0038]
According to the second aspect of the present invention, the entire hoisting mechanism can be reduced in thickness, and the installation space of the hoisting mechanism in the hoistway is made sufficiently small in combination with the use of the flat rope. be able to.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a rope-type elevator apparatus showing a first embodiment of the present invention.
FIG. 2 is an exemplary sectional view showing a drive sheave of the hoisting mechanism provided in the embodiment;
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a schematic diagram of a rope-type elevator device showing a second embodiment.
FIG. 5 is a schematic view of a rope-type elevator device according to a third embodiment.
FIG. 6 is a schematic diagram of an elevator apparatus showing another example of roping.
FIG. 7 is a schematic view of an elevator apparatus showing still another example of roping.
FIG. 8 is a schematic view showing another example of a hoisting mechanism.
FIG. 9 is a front view showing a state in which a round rope is wound around a conventional drive sheave.
FIG. 10 is a front view showing a state in which a round rope is wound around the conventional drive sheave.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 elevator car 2 hoisting mechanism 3 flat rope 4 car frame 7 drive motor 8 drive sheave 8 a winding drum section 8 b flange section

Claims (2)

A rope that winds the other end of a main rope having one end connected to an elevator car around a drive sheave of a hoisting mechanism, and drives the hoisting mechanism forward and reverse to move the elevator car up and down in a hoistway. An elevator system,
The main rope is formed of a flat rope having a flat cross section, the drive sheave is formed to be thin, and the flat rope is wound around the winding drum portion of the drive sheave in an overlapped state. Rope type elevator device. The rope type elevator apparatus according to claim 1, wherein a drive motor of the hoist mechanism is provided inside the drive sheave.

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