JP2015037984A - Elevator system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine-room-less type elevator system which allows reduction of the overhead dimension above the car, requires no bending sheave and also allows improvement of the system efficiency.SOLUTION: In an elevator system, a car 12 and a balance weight 13 in a hoistway 11 are driven so as to move up and down mutually through a main rope wound around the main sheave of a hoist 14. The hoist 14 is flat and is arranged obliquely at a position within a projected space, in the projection from above, between one side surface of the car 12 and the inner wall 11c of the hoistway 11 and close to the back surface of the car 12. One radial-direction end of the car sheave 20 wound with the main rope is located, in the projection from above, close to one radial-direction end 14a of the main sheave in the projection space. The balance weight 13 is arranged liftably in a space between the back surface of the car 12 and the inner wall 11b of the hoistway, and the balance weight sheave 21 wound with the main rope is located, in the projection from above on one radial-direction end, close to the other radial-direction end 14b of the main sheave.

Description

  Embodiments of the present invention relate to a machine roomless type elevator system using a flat hoist.

  As an elevator system, a car and a counterweight are arranged in a hoistway, and the car and the counterweight are driven to move up and down with each other via a main rope wound around the main sheave of the hoisting machine. There is. In such an elevator system, the hoisting machine is installed on the projection surface of the car at the upper part of the hoistway. For this reason, the so-called overhead dimension above the car in the hoistway cannot be reduced, resulting in useless space.

  Therefore, a machine room in which the hoisting machine has a flat shape in which the axial direction is shorter than the radial direction, and the flat surface direction is located at a position deviated from the projected plane of the car as viewed from above the hoistway. It was considered to construct a less-type elevator system. In this case, when the counterweight is configured so as to be moved up and down on the back side of the car so that it can be raised and lowered, the flat hoisting machine has a side surface of the car in the hoistway and an inner wall of the hoistway facing it. (See, for example, Patent Document 1). That is, since the hoisting machine is arranged on the side surface and the counterweight is arranged on the rear side with respect to the car, it is difficult to wind the main rope that has passed through the main sheave of the hoisting machine directly on the counterweight side. , Installed a sora sieve between the hoist and the counterweight, and was wound around this sora sheave

JP 2002-205888 A

  Thus, if the hoisting machine is installed on the projection surface of the car at the upper part of the hoistway, the overhead dimension above the car cannot be reduced, and the flat hoisting machine is used for the car's projection surface. If it is placed at a position deviating from the range, solacey is necessary, and the system efficiency cannot be improved.

  The problem to be solved by the present invention is to provide a machine roomless type elevator system which can reduce the overhead dimension above the car, does not require a sora-ceave, and can improve system efficiency.

  In an elevator system according to an embodiment of the present invention, a car and a counterweight are arranged in a hoistway, and the car and the counterweight are connected to a main sheave of a hoisting machine via a main rope. The hoisting machine has a flat shape whose axial direction is shorter than the radial direction, and the flat surface direction is a hoistway opposite to one side surface of the car. In the projection space from above with the inner wall, at a position near the back of the car, it is inclined with respect to one side of the car, and the main rope of the car is wound. One end in the radial direction of the car sheave to be hung is located near the radial end of the main sheave of the hoisting machine in the projection space from one side of the car shelves. The counterweight is The counterweight sheave, which is disposed so as to be capable of ascending and descending in a projection space from above between the rear surface of the car and the inner wall of the hoistway facing the car, is wound above one end in the radial direction. The projection position from is located near the other end in the radial direction of the main sheave.

It is an elevator system top view concerning one embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view showing a configuration in a hoistway of a machine roomless type elevator system according to this embodiment. In this elevator system, as shown in FIG. 1, a car 12 and a counterweight 13 are disposed in a hoistway 11, and the car 12 and the counterweight 13 are wound around a main sheave of a hoisting machine 14. It is the structure which mutually raises / lowers through the hung main rope which is not shown in figure.

  The illustrated lower surface 11a of the hoistway 11 is the front side where the entrance for each floor is provided. The car 12 is arranged so that the front surface having a boarding gate (not shown) faces the above-described front side 11 a of the hoistway 11. Guide rails 17 are provided along the vertical direction on the left and right sides of the car 12 in the figure, and the car 12 is guided up and down by the guide rails 17. The counterweight 13 is disposed in a space between the rear surface of the car 12 and the hoistway inner wall 11b facing the car. Guide rails 18 are provided along the vertical direction on the left and right sides in the figure. It is guided up and down by the rail 18.

  The hoisting machine 14 has a flat shape in which the axial direction is shorter than the radial direction, and is in a projection space from above between one side surface (the left side surface in the drawing) of the car 12 and the hoistway inner wall 11c facing it. It is arranged at a position near the back of the car 12. Further, the hoisting machine 14 is provided such that the flat surface direction is inclined with respect to one side surface of the car 12. That is, the hoisting machine 14 is inclined and arranged with a positional relationship deviating from the projection plane from above the car 12.

  The car 12 and the counterweight 13 each have a car sheave 20 or a counterweight sheave 21 around which the main rope is wound. The car sheave 20 is composed of two pulleys 20 a and 20 b provided on the bottom surface of the car 12. These pulleys 20a and 20b are provided such that their radial ends project outward from the left and right side surfaces of the car. Of these, one end in the radial direction of the car sheave 20, that is, the left end in the drawing of one pulley 20a, is a space between one side surface (the left side surface in the drawing) of the car 12 and the hoistway inner wall 11c facing the one side. It is located near the back of the car 12. The counterweight sheave 21 includes two pulleys 21 a and 21 b provided on the upper surface of the counterweight 13. These two pulleys 21a and 21b are arranged such that their radial directions are along the width direction (the left-right direction in the drawing) of the counterweight 13. One end portion of the counterweight sheave 21 in the radial direction, that is, the left end in the drawing of one pulley 21 a is disposed near the left end in the drawing on the upper surface of the counterweight 13.

  For this reason, the projection position from the upper end of the aforementioned radial end portion of the car sheave 20 (the left end in the drawing of the pulley 21a) is located near the one end portion 14a of the main sheave of the hoisting machine 14 arranged in an inclined manner. Further, the projection position of the counterweight sheave 21 from the above-mentioned one end portion in the radial direction (the left end in the drawing of the pulley 21a) from the upper side is close to the other end portion 14b in the radial direction of the main sheave of the hoisting machine 14 that is inclined. Located in.

  One end of the main rope (not shown) is fixed to the upper part in the hoistway 11, and after descending the hoistway 11, the car sheave 20 provided on the lower surface part of the car 12 has its other radial end ( Wrapped around the pulley 20b (the right end in the figure) and ascends in the hoistway 11 from one end in the radial direction of the car sheave 20 (the left end in the figure on the pulley 20a). Thereafter, the main rope is wound around the main sheave of the hoisting machine 14 from one end 14a in the radial direction and then descends in the hoistway 11 from the other end 14b in the radial direction of the main sheave. Then, the counterweight sheave 21 is wound around one end portion in the radial direction (the left end in the drawing of the pulley 21a) from the other end portion in the radial direction of the counterweight sheave 21 (the right end in the drawing in the pulley 21b). And its end is fixed to the upper part of the hoistway 11. As a result, 2: 1 roping is performed.

  Since the flat hoisting machine 14 is inclined with respect to one side surface of the car 12 at a position deviated from the projection surface from above the car 12, the radial end portion 14a of the main sheave is A radial end of the car sheave 20 (the left end in the drawing of the pulley 21 a) is located near the projection position, and the other radial end 14 b of the main sheave is one end of the counterweight sheave 21 in the radial direction. It will be located near the projection position (the left end of the pulley 21a in the figure). For this reason, when winding the main rope, the hoisting machine 14 and the car sheave 20 and the counterweight sheave 21 can be directly wound, and there is no need to interpose a solar sieve as in the prior art. Efficiency is improved.

  The hoisting machine 14 may be installed on the guide rail 18 of the counterweight 13 in the hoistway 11. In addition, you may attach the hoisting machine 14 to the building side in which the hoistway 11 is formed through the support material which is not shown in figure.

  The car sheave 20 is composed of its rotation surface, that is, a plurality of pulleys 20a and 20b. An imaginary line X connecting the rotation surfaces of the plurality of pulleys 20a and 20b is the width direction of the car 12 (the left-right direction in the figure). It is good to comprise so that it may incline with respect to. If comprised in this way, since a main rope will pass the gravity center position of the passenger car 12 as shown in the figure, a well-balanced suspension can be achieved.

  It should be noted that the rotating surface (virtual line X) of the car sheave 20 does not necessarily have to be inclined with respect to the width direction of the car 12. For example, when the car 12 has a shape with a short depth dimension, the two pulleys 20a and 20b may be arranged so as to be substantially parallel to the width direction of the car at a position close to the back surface of the car bottom. Good. In this case, the suspension balance is somewhat worse, but there is no problem in practical use.

  Thus, the hoisting machine 14 has a flat shape and is installed at a position removed from the projection surface of the car 12, so that the overhead dimension can be reduced, and the main sheave of the hoisting machine 14 is balanced with the car sheave 20. Since it is inclined between the weight sheave 21 and the counterweight 13, the rear falling structure of the counterweight 13 can be realized with the use of a sorace sieve.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 11 ... Hoistway 12 ... Ride car 13 ... Counterweight 14 ... Flat hoist 14a ... One end part of main sheave 14b ... Other end part of main sheave 18 ... For counterweight Guide rail 20 ... Cable sheave 21 ... Balance weight sheave

Claims (4)

An elevator system in which a car and a counterweight are arranged in a hoistway, and the car and the counterweight are driven up and down mutually via a main rope wound around a main sheave of a hoist. ,
The hoisting machine has a flat shape in which the axial direction is shorter than the radial direction, and the flat surface direction is within the projection space from above between one side surface of the car and the inner wall of the hoistway facing the car. , Arranged at a position near the back of the car and inclined with respect to one side of the car,
The radial position of the car sheave around which the main rope is wound of the car has a projection position from above that is located in the projection space near the radial end of the main sheave of the hoisting machine. And
The counterweight is arranged so as to be able to be raised and lowered in a projection space from above between the rear surface of the car and the inner wall of the hoistway facing the cage, and the counterweight sheave around which the main rope is wound is, The projection position from above the one end in the radial direction is located near the other end in the radial direction of the main sheave.
An elevator system characterized by that.   The elevator system according to claim 1, wherein the hoisting machine is installed on the counterweight guide rail.   The elevator system according to claim 1, wherein the hoisting machine is attached to a building side where the hoistway is formed via a support material.   The car sheave includes a plurality of pulleys whose radial ends protrude from the one side surface of the car and the other side surface facing the one side surface, and a virtual line connecting the rotation surfaces of the plurality of pulleys rides on the car sheave. The elevator system according to any one of claims 1 to 3, wherein the elevator system is arranged to be inclined with respect to the back surface of the car.

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