JP4802844B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus that includes a hoisting machine in a hoistway and moves a car and a counterweight along a guide rail in the hoistway.

  Conventionally, in an elevator equipped with a hoisting machine in a hoistway, an elevator apparatus has been proposed in which a turning pulley is arranged near the hoisting machine.

  For example, in Patent Document 1 below, two turning pulleys are arranged below the hoisting machine, and ropes extending downward from both sides of the sheave of the hoisting machine are wound around the two turning pulleys, respectively. An elevator device is described that spans the turning pulley.

  Further, in Patent Document 2 below, two turning pulleys are arranged above the hoisting machine, and ropes extending upward from both sides of the drive sheave of the hoisting machine are wound around the two turning pulleys. It is described that the winding angle of the rope around the drive sheave is adjusted by changing the relationship between the diameter and the distance between the turning pulley and the drive sheave.

Japanese Patent Application Laid-Open No. 2004-26424 (FIGS. 1, 2 and 4, etc.) International Publication No. 2004/050528 Pamphlet (Figs. 4 and 5 etc.)

  However, in the elevator apparatus described in Patent Documents 1 and 2, the hoisting machine is installed at the top of the hoistway, and no consideration is given to the maintenance worker performing maintenance work on the hoisting machine from the pit floor. Was not. In addition, since the two turning pulleys in Patent Documents 1 and 2 are installed at the same height, it is not easy to reduce the horizontal dimension of the entire drive mechanism including these turning pulleys. Furthermore, if the inter-shaft distance of the turning pulley is too small, there is a problem in terms of ease of maintenance work and safety. Therefore, in the elevator apparatus described in Patent Documents 1 and 2, the rope and the drive sheave It is difficult to increase the winding angle between them, and as a result, it is not easy to obtain a sufficient frictional force for driving a car or the like.

  An object of the present invention is to provide an elevator apparatus without a machine room in which the drive mechanism has a small lateral dimension and a large frictional force between a rope and a drive sheave.

In order to achieve the above object, the present invention provides an elevator apparatus in which a ride car and a counterweight suspended by a rope in a hoistway are driven by a sheave of a hoisting machine, and is wound downward from the center of the hoistway. An upper machine is installed, a first turning pulley and a second turning pulley are installed below the hoisting machine, and the shaft of the first turning pulley has different heights on the right side with respect to the shaft of the second turning pulley. And the left end of the first turning pulley is located on the left side of the right end of the sheave and the right end of the second turning pulley is located on the right side of the left end of the sheave. The rope drawn to the upper side passes through the first turning pulley and then rises, reaches the car through the third turning pulley, and the rope drawn downward from the left end of the sheave moves to the second turning Rises through the pulley Reached the counterweight through the fourth diverting pulley, the left end of the first diverting pulley was positioned on the left side of the right end of the second diverting pulley.

  According to the present invention, it is easy to make the rope winding angle around the sheave larger than 180 degrees by using the first turning pulley and the second turning pulley provided below the hoisting machine. It is possible to easily provide an elevator apparatus that increases the frictional force between the two. It is also possible to provide an elevator apparatus in which the first turning pulley and the second turning pulley are arranged at different heights, and the lateral dimensions of the drive mechanism including these turning pulleys are reduced.

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

  FIG. 1 is a diagram partially showing how to hang a rope 5 of an elevator apparatus according to a first embodiment of the present invention, and FIG. 2 is a plan sectional view of a hoistway 6 in the elevator according to the present embodiment. In the elevator apparatus of this embodiment, the car 1 is moved up and down along the car guide rails 16a and 16b, and the counterweight 2 is moved up and down along the counterweight guide rails 17a and 17b. The car 1 and the counterweight 2 are suspended by a rope 5 and driven by a sheave 4 of the hoisting machine 3.

The hoisting machine 3 is installed in a space near the pit below the center of the hoistway 6 and in the space between the moving area of the car 1 and the hoistway wall 11. The first turning pulley 7 and the second turning pulley 8 are installed below the hoisting machine 3, and the shaft of the first turning pulley 7 is located at different heights on the right side with respect to the shaft of the second turning pulley 8. The left end of the first turning pulley 7 is located on the left side of the right end of the sheave 4, and the right end of the second turning pulley 8 is located on the right side of the left end of the sheave 4. The left end of the first turning pulley 7 is located on the left side of the right end of the second turning pulley 8. Here, the right side in this invention shows the right position on the basis of the sheave 4 when viewed from the front of the hoisting machine 3 as shown in FIG.

Then, the rope 5 drawn downward from the right end of the sheave 4 passes through the first turning pulley 7 and then rises, and the two third turning pulleys 9 fixed to the top of the hoistway 6 are provided. Passing through the two lifting pulleys 14 installed at the bottom of the car 1, the rope reaches the rope stop 12 at the top of the hoistway 6. On the other hand, the rope 5 drawn downward from the left end of the sheave 4 is lifted after passing through the second turning pulley 8, and the two fourth turning pulleys 10 fixed to the top of the hoistway 6 are provided. Passing through the suspension pulley 15 attached to the upper part of the counterweight 2, the rope reaches the rope stop 13 at the top of the hoistway 6. 2, the vertical projection of the third turning pulley 9 is arranged so as to be substantially perpendicular to the vertical projection of the fourth turning pulley 10 and the vertical projection of the sheave 4.

  Further, the first turning pulley 7 and the second turning pulley 8 are arranged in steps on the integral base 18 with the vertical positions of the shafts of both pulleys being different. The first turning pulley 7 and the second turning pulley 8 are installed such that the positions of both pulleys can be adjusted by providing a plurality of bolt holes in the vertical direction of the shafts of both pulleys and the fixing portion of the bearing ( Not shown).

  The hoisting machine 3 has a thin shape. Here, the term “thin” refers to the feature that the radial dimension of the outer shape of the housing is larger than the axial thickness dimension.

  According to this embodiment, since the first turning pulley 7 and the second turning pulley 8 are arranged in a step difference, compared to the case where the first turning pulley 7 and the second turning pulley 8 are arranged at the same height. Thus, the rotating shaft of the first turning pulley 7 and the rotating shaft of the second turning pulley 8 can be easily moved in the horizontal direction. Specifically, considering that the diameter of the sheave 4 and the diameters of the first turning pulley 7 and the second turning pulley 8 are equal, when these turning pulleys are arranged at the same height, the shafts of the turning pulleys Although the horizontal distance d is larger than the diameter D of the sheave 4, the horizontal distance d can be made smaller than the diameter D of the sheave 4 as in the present embodiment. Therefore, the left and right dimensions of the entire drive mechanism including the hoisting machine 3 and the two turning pulleys below the hoisting machine 3 can be reduced.

  Further, even if the first turning pulley 7 and the second turning pulley 8 are brought close to each other in the horizontal direction, the distance between the axes itself can be kept large, so that maintenance work can be easily performed and safety can be maintained. As a result, it becomes easy to make the winding angle of the rope 5 around the sheave 4 larger than 180 °, and the frictional force between the sheave 4 and the rope 5 increases, so that the transmission efficiency can be increased. Therefore, there is an effect that a more compact drive mechanism can be configured under a certain load condition. As a result, the entire hoistway can be configured compactly.

  Furthermore, according to the present embodiment, the own weight of the rope 5 acts on the sheave 4, so that the frictional force acting on the sheave 4 increases as compared with the configuration in which no turning pulley is provided below the hoisting machine 3. There is an effect.

  Furthermore, according to this embodiment, since a downward load acts on the sheave 4 from the rope 5 similarly to the case where the hoisting machine 3 is installed on the top of the hoistway 6, the hoistway 6 is installed on the top of the hoistway 6. When the designed hoisting machine 3 exists, there is an effect that the hoisting machine 3 can be used as it is.

  Furthermore, according to this embodiment, since the hoisting machine 3 installed in the space between the moving area of the car 1 and the hoistway wall 11 is thin, the entire hoistway can be configured more compactly. There is also an effect that it becomes possible.

  Next, a second embodiment of the present invention will be described with reference to FIG. The outline of the overall configuration of the apparatus is the same as that of the first embodiment. The difference from the first embodiment is that the second turning pulley 8 includes a plurality of pulleys 8a and 8b, and the shafts of the pulleys 8a and 8b are arranged close to each other with substantially the same height.

  According to the present embodiment, as in the above-described embodiment, there is an effect of reducing the lateral dimension in the direction along the hoistway wall 11 of the drive mechanism while increasing the transmission efficiency. In particular, the first turning pulley 7 and the second turning pulley 8 are different in level, and the two second turning pulleys 8a and 8b are arranged horizontally, so that the winding angle of the rope 5 to the sheave 4 is increased. There is a new effect that the position of the rising start point of the rope 5 can be freely adjusted while maintaining a large angle.

  Finally, a third embodiment of the present invention will be described with reference to FIG. The outline of the overall configuration of the apparatus is the same as that of the second embodiment. The difference from the second embodiment is that the second turning pulleys 8a and 8b are arranged side by side so that the shaft of the turning pulley 8b close to the hoistway wall 11 is higher than the shaft of the other turning pulley 8a. It is to be done.

  According to the present embodiment, as in each of the embodiments described above, there is an effect of reducing the lateral dimension in the direction along the hoistway wall 11 of the drive mechanism while increasing the transmission efficiency.

  In particular, since the two second turning pulleys 8a and 8b are arranged side by side, there is a new effect that the entire length of the rope 5 can be shortened as compared with the second embodiment.

It is a schematic diagram which shows how to hang a rope in the elevator apparatus of 1st Embodiment of this invention. It is a plane sectional view of the hoistway of the elevator apparatus of a 1st embodiment of the present invention. It is a schematic diagram which shows how to hang a rope in the elevator apparatus of 2nd Embodiment of this invention. It is a schematic diagram which shows how to hang a rope in the elevator apparatus of 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Counterweight, 3 ... Hoisting machine, 4 ... Sheave, 5 ... Rope, 6 ... Hoistway, 7 ... 1st turning pulley, 8, 8a, 8b ... 2nd turning pulley, 9 ... 3rd turning pulley, 10 ... 4th turning pulley, 11 ... hoistway wall, 12, 13 ... rope stop, 14 ... lifting pulley, 15 ... suspension pulley for counterweight, 16a, 16b ... car guide rail, 17a , 17b ... Balance weight guide rail, 18 ... Base.

Claims (8)

In an elevator apparatus in which a car and a counterweight suspended by a rope in a hoistway are driven by a sheave of a hoisting machine, a hoisting machine is installed below the center of the hoistway, and the lower part of the hoisting machine The first turning pulley and the second turning pulley are installed, the shaft of the first turning pulley is positioned at a different right side with respect to the shaft of the second turning pulley, and the left end of the first turning pulley is The right end of the sheave is located on the left side of the sheave and the right end of the second turning pulley is located on the right side of the sheave. The rope drawn downward from the right end of the sheave is the first turning pulley. The rope that has passed through the second turning pulley rises after passing through the second turning pulley, and rises after passing through the second turning pulley. Through the balance And RiniItaru,
The elevator apparatus according to claim 1, wherein a left end of the first turning pulley is located on a left side of a right end of the second turning pulley .   The elevator apparatus according to claim 1, wherein the hoisting machine is located in a space of a gap between a moving area of the car and a wall of the hoistway.   The elevator apparatus according to claim 1, wherein the hoisting machine is thin. The elevator apparatus according to any one of claims 1 to 3 , wherein the first turning pulley and / or the second turning pulley is installed such that a vertical position thereof is adjustable. The elevator apparatus according to any one of claims 1 to 4 , wherein the hoisting machine, the first turning pulley, and the second turning pulley are installed on an integral base. The elevator apparatus according to any one of claims 1 to 5 , wherein there are a plurality of the first turning pulleys and / or the second turning pulleys. The elevator apparatus according to claim 6 , wherein shafts of the plurality of pulleys are positioned at substantially the same height. The elevator apparatus according to claim 6 , wherein a shaft of a pulley closer to the hoistway wall among the plurality of pulleys is positioned higher than a shaft of the other pulley.

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