JP6082641B2 - Elevator equipment - Google Patents

Description

The present invention relates to an elevator apparatus having a car suitable for space saving of a hoistway cross-sectional area.

  There are two types of roping methods in an elevator: 1: 1 roping in which a rope and a weight are connected to both ends of the rope, and 2: 1 roping in which a pulley is attached to the carriage and the weight, and the rope is suspended through the pulley.

  In a 2: 1 roping elevator, a pulley may be attached to the upper part of the car and a pulley may be attached to the lower part of the car.

  When a pulley is attached to the upper part, it is called a lifting type, and when a pulley is attached to the lower part, it is called a lifting type.

  For the need to reduce the clearance at the top of the car, a lift type elevator is employed (see Patent Documents 1 and 2).

JP2001-80852 WO2004 / 000711

  In the case of the lift-up type, the part through which the rope passes cannot be the door surface, so the rope passes through the side surface other than the surface where the door is located, and in many cases it passes through the side surface in the left-right direction with respect to the door. Normally, the two pulleys under the car are arranged so as to be parallel to the door opening and closing direction, as shown in Patent Document 1 above.

  At this time, in the horizontal cross-sectional view of the hoistway, the line connecting the two pulleys is disposed so as to pass through the center of gravity of the passenger car or the vicinity of the center of gravity.

  However, as shown in Patent Document 2, when there are restrictions on the arrangement of various devices including rails and hoisting machines, or when doors exist in two front and rear directions, normal arrangement may not be possible. is there.

  Even in this case, in the horizontal sectional view of the hoistway, the line connecting the two pulleys is arranged so as to pass through the center of gravity of the passenger car or the vicinity of the center of gravity.

  As a result, the pulleys are shifted forward and backward, and in the horizontal cross-sectional view of the hoistway, the line connecting the two pulleys is not parallel to the door opening / closing direction, and the case is inclined.

  In this case, the rotation direction of the lower pulley of the car is not parallel to the door opening / closing direction and is inclined in the front-rear direction, and all the ropes are more than the projected cross section of the car in the horizontal cross section of the hoistway. It is necessary to install a pulley under the car so that it protrudes outside.

  Therefore, in proportion to the thickness of the pulley under the car, the amount that the pulley under the car protrudes from the projected cross section of the car becomes large, and the larger the overhang, the hoistway required for installing the elevator. There was a problem that the cross-sectional area became large.

  Furthermore, the amount of protrusion at this time is affected by the dimension in the thickness direction of the pulley under the car, so the larger the number of ropes used, the larger the load, or when using a rope with a small breaking load, etc. However, when it is necessary to use many ropes, there is a problem that the amount of protrusion is inevitably increased.

The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the amount of protrusion of the pulley under the car and to install it even in a car in which the pulley under the car is inclined at an angle. To provide an elevator that can reduce the required cross-sectional area of the hoistway.

In order to achieve the above object, the present invention provides a lower car pulley on which a main rope is wound, and the lower car pulley is provided at the bottom of the pulley and is suspended by the main rope to lift and lower passengers. In an elevator apparatus having a car door and a car door that is provided on the car and opens and closes along a straight line, the car lower pulley is inclined not parallel to the opening and closing direction of the car door The car is provided with a pair of directions, and the center of gravity of the car is positioned on a straight line connecting the car. Each of the pair of car lower pulleys includes a plurality of pulleys, and each of the pair of car rides. The diameters of the plurality of pulleys of the car lower pulley are different in size, and the sum of the diameters of the pair of pulleys around which the same main rope is wound is equal among the plurality of pulleys of the pair of car lower pulleys. It characterized characterized by being configured to.

Since the present invention is configured as described above, even in a car in which the car lower pulley is inclined and disposed, the amount of protrusion of the car lower pulley can be reduced and the hoistway cross-sectional area required for installation can be reduced. Can be provided.

The hoistway top view at the time of seeing upward from the hoistway bottom part of the elevator apparatus which is this invention. The passenger car side view of the elevator apparatus which is this invention. The top view explaining the pulley under a car of the elevator apparatus which is this invention. The top view explaining the pulley under a car of the elevator apparatus which is this invention. The hoistway top view at the time of seeing upward from the hoistway bottom part of the elevator apparatus which is the 2nd Embodiment of this invention. The whole block diagram explaining the roping method of the elevator apparatus which is this invention.

  Hereinafter, examples will be described with reference to the drawings.

  First, the elevator apparatus roping method according to the present invention will be described with reference to FIGS.

  FIG. 1 is a plan view of a hoistway when the elevator apparatus according to the present invention is viewed from the bottom of the hoistway, and FIG. 6 is an overall configuration diagram illustrating a roping method for the elevator apparatus according to the present invention.

  One end of the main rope 14 is fixed to the top of the hoistway 12 as shown in FIG. 6, is stretched so as to hang down, is wound around the counterweight pulley 8, and is then stretched upward and wound. After being wound around the sheave 7 that is rotationally driven by the upper machine 6, it is wound around the top pulley 5, and then wound around the car lower pulleys 4, 3, and is then stretched upward to form the hoistway 12. Roping is performed so that the other end is fixed to the top.

  Here, the car 1 is provided with the car lower pulleys 3 and 4 at the bottom of the car 1 and is suspended by the main rope 14 so that passengers can ride on the car guide rails 9a and 9b in the hoistway 12. It is comprised so that it may go up and down as guided by.

  Further, the counterweight 2 is connected to the main rope 14 so as to be lifted and lowered by being guided by the counterweight guide rails 10a and 10b in the hoistway 12 in the manner of a fishing bottle with the car 1.

  Further, in FIG. 1, the main rope 14 is not shown in order to clarify the device arrangement.

Furthermore, as shown in FIG. 1, the car 1 is provided with a car door 11 that opens and closes in the left-right direction in the drawing along a straight line.

  In FIG. 1, when the straight line connecting the car guide rails 9 a and 9 b is away from the center of gravity of the car 1, when an uneven load is applied to the car 1 due to variations in how passengers ride in the car 1, The pressing force against the car guide rails 9a and 9b may increase.

Therefore, the car guide rails 9a and 9b are arranged so that the straight line connecting the car guide rails 9a and 9b passes through the center of gravity of the car 1 or the vicinity of the center of gravity.

  Further, the pair of lower car pulleys 3 and 4 are not located at the same distance from the car door 11, and the lower car pulley 3 is located on the side closer to the car door 11, so The pulley 4 is located on the side far from the car door 11.

  The car lower pulleys 3 and 4 will be described in detail with reference to FIGS.

  3 and 4 are plan views for explaining the pulley under the car of the elevator apparatus according to the present invention, each showing a state in which the main rope is wound.

  As shown in FIG. 3, the car lower pulley 3 is provided with a plurality of pulleys 3 a, 3 b, 3 c, and is arranged in the order of the pulleys 3 a, 3 b, 3 c from the side closer to the car door 11.

  The main rope 14a is wound around the pulley 3a, the main rope 14b is wound around the pulley 3b, and the main rope 14c is wound around the pulley 3c.

  As shown in FIG. 4, the car lower pulley 4 is provided with a plurality of pulleys 4 a, 4 b, 4 c, and is arranged in the order of the pulleys 4 a, 4 b, 4 c from the side closer to the car door 11.

  The main rope 14a is wound around the pulley 4a, the main rope 14b is wound around the pulley 4b, and the main rope 14c is wound around the pulley 4c.

  Further, as shown in FIG. 3, the diameters of the pulleys 3a, 3b, and 3c are d1, d2, and d3, respectively, and as shown in FIG. 4, the diameters of the pulleys 4a, 4b, and 4c are d4, d5, and d6, respectively. .

  The diameters have a relationship of d1> d2> d3 and a relationship of d6> d5> d4.

Furthermore, the sum of d1 and d4, the sum of d2 and d5, and the sum of d3 and d6 are in the same relationship.

  Further, a straight line connecting the car lower pulleys 3 and 4 is formed in an inclined direction that is not parallel to the opening and closing direction of the car door 11, and the center of gravity of the car 1 is positioned on the straight line. Has been.

Furthermore, the rotation axis of the lower car pulleys 3 and 4 is not perpendicular to the opening / closing direction of the car door 11 but is inclined, but the inclination of this axis is different from that of the lower car pulleys 3 and 4. Therefore, both rotation axes are arranged in parallel.

  Therefore, the center of gravity of the car 1 can be suspended by the main rope 14 so that the unbalanced load of the car 1 does not act on the car guide rails 9a and 9b.

  Further, since the car lower pulley 3 is configured as described above, as shown in FIG. 3, the straight line connecting the positions farthest from the center of gravity of the car 1 of the pulleys 3 a, 3 b, 3 c of the car lower pulley 3 is The arrangement relationship is orthogonal to the opening / closing direction of the car door 11.

  Similarly, since the car lower pulley 4 is configured as described above, as shown in FIG. 4, the straight line connecting the positions farthest from the center of gravity of the car 1 of the pulleys 4a, 4b, 4c of the car lower pulley 4 is The arrangement relationship is orthogonal to the opening / closing direction of the car door 11.

  In other words, the straight line connecting the position farthest from the center of gravity of the car 1 of each of the pulleys 3a, 3b, 3c of the car lower pulley 3 and the car of each of the pulleys 4a, 4b, 4c of the car lower pulley 4. The straight line connecting the position farthest from the center of gravity position of 1 is parallel to the car side plates 1a and 1b shown in FIGS.

Therefore, the amount of protrusion of the car lower pulleys 3 and 4 from the car 1 can be reduced, and as a result, it is possible to provide an elevator apparatus that can reduce the hoistway cross-sectional area required for installation.

Further, as shown in FIG. 3, the angle formed by the radial direction of the car lower pulley 3 and the opening / closing direction of the car door 11 is θ, the distance between the centers of the pulley 3a and the pulley 3b is L1, and the pulley 3b and the pulley 3c are When the center-to-center distance is L2, the relation between the diameters d1, d2, and d3 of the pulleys 3a, 3b, and 3c is
d2 / 2 = d1 / 2−L1 × tanθ
d3 / 2 = d1 / 2−L2 × tanθ
It has become.

With this relationship, the straight line connecting the most protruding positions of the three main ropes 14a to 14c from the car 1 can be arranged in parallel to the car side plates 1a and 1b.

  Furthermore, as shown in FIG. 2, the main ropes 14a to 14c are wound around the pair of car lower pulleys 3 and 4, but the diameter of the pulley around which the main ropes 14a to 14c are wound is a pair. Since the car lower pulleys 3 and 4 are different, the main ropes 14a to 14c under the car 11 are not parallel to each other.

  Here, FIG. 2 is a car side view of the elevator apparatus according to the present invention.

In addition, when the sum of the length of the main rope 14 in contact with the lower car pulley 3 and the length of the main rope 14 in contact with the lower car pulley 4 is calculated for each of the main ropes 14a to 14c, the sum of the lengths is calculated. Are equal.

  Next, slip that occurs between the pulley and the main rope will be described.

  For example, in the car lower pulley 3, since the pulley 3a has a large diameter, the peripheral speed of the pulley 3a is faster than the moving speed of the main rope 14a.

  Therefore, the moving speed of the main rope 14a is relatively slower than the peripheral speed of the pulley 3a, and slipping occurs.

  Moreover, since the pulley 4a has a small diameter in the pulley 4 under the car, the peripheral speed of the pulley 4a is slower than the moving speed of the main rope 14a.

  Due to this slip, it is considered that wear occurs between the pulleys 3a and 4a and the main rope 14a.

Each of the plurality of pulleys 3a, 3b, 3c and 4a, 4b, 4c of the pair of passenger car lower pulleys 3, 4 of this embodiment is connected to the same shaft and is configured to rotate.

  FIG. 5 shows a second embodiment according to the present invention.

  FIG. 5 is a plan view of the hoistway when the elevator apparatus according to the second embodiment of the present invention is viewed from above the hoistway bottom.

  As shown in FIG. 5, the car lower pulley 16 is provided with three pulleys 16 a to 16 c having different diameters, and the car lower pulley 17 is provided with three pulleys 17 a to 17 c having different diameters. The pulleys 16a to 16c and 17a to 17c have different rotation shafts, can rotate independently, and no slip occurs between the main rope 14 and the car lower pulleys 16 and 17.

  Therefore, a structure in which wear is unlikely to occur between the main rope 14 and the car lower pulleys 16 and 17 can be achieved.

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Car lower pulley 3a, 3b, 3c Pulley 4a, 4b, 4c Pulley 4 Car lower pulley 5 Top pulley 6 Hoisting machine 7 Sheave 8 Balance weight pulley 9a, 9b Car guide rail
10a, 10b Balanced weight guide rail 11 Car door 12 Hoistway 14a, 14b, 14c Main rope 16 Car lower pulley 17 Car lower pulley 16a, 16b, 16c Pulley 17a, 17b, 17c Pulley

Claims (5)

A car lower pulley on which a main rope is wound, and the car lower pulley is provided at the bottom of the car, and a car that lifts and lowers passengers by being suspended by the main rope is provided in the car. In an elevator apparatus equipped with a car door that opens and closes along a straight line,
The car lower pulley is provided in such a way that the center of gravity of the car is located on a straight line connecting the pair, in a tilted direction that is not parallel to the opening / closing direction of the car door,
Each of the pair of car lower pulleys has a plurality of pulleys,
The diameters of the plurality of pulleys of the pair of car lower pulleys are different from each other,
An elevator apparatus characterized in that the sum of the diameters of a pair of pulleys around which the same main rope is wound is equal among a plurality of pulleys of each of the pair of pulleys under each car. In the elevator apparatus according to claim 1,
A diameter of a plurality of pulleys of one of the car lower pulleys of the pair of car lower pulleys is formed so as to increase as the distance from the pulley close to the car door increases, and the pair of car lower pulleys An elevator apparatus characterized in that the diameter of the plurality of pulleys of the other car lower pulley is made smaller as the distance from the pulley closer to the car door decreases. In the elevator apparatus according to claim 1 or claim 2,
An elevator apparatus characterized in that a straight line connecting a position farthest from the center of gravity of the car of each of the plurality of pulleys of the pair of car lower pulleys is formed to be orthogonal to an opening / closing direction of the car door. In the elevator apparatus according to claim 1 or claim 2,
Each of the plurality of pulleys of the pair of passenger car lower pulleys is connected to the same shaft and rotates. In the elevator apparatus according to claim 1 or claim 2,
Each of the plurality of pulleys of the pair of passenger car lower pulleys is rotated by different rotation shafts.