JP2007008611A - Elevator device and inspection method for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of freely arranging a low friction member provided on a part of a main cable of the elevator while fitting to usage. <P>SOLUTION: The elevator device is provided with the main cable for suspending a balance weight of the elevator in a bottle-hanging system; a drive sheave of a winding machine wrapped with the main cable; and the low friction member detachably provided on the main cable and having smaller friction coefficient between the drive sheave and it than friction coefficient between the main cable and the drive sheave. The low friction member is arranged at a position it is not engaged with the drive sheave at usual operation of the elevator and when the car rises to exceed an elevating range, it is engaged with the drive sheave from a car side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traction type elevator apparatus and an inspection method for a traction type elevator.

  The traction system is the mainstream of current elevator equipment. In this traction type elevator apparatus, a car and a counterweight are suspended in a fishing bottle type by a main rope, and the main rope is wound around the drive sheave of the elevator hoist so that the main rope is connected to the drive sheave. Raise and lower the car using friction. In addition, the conventional elevator apparatus is configured such that when the car rises beyond a predetermined range in the hoistway, the driving sheave of the hoisting machine idles with respect to the main rope, and the car is the hoistway. There is disclosed a device that prevents contact with the top portion so as not to cause defects such as deformation and damage to the constituent members of the apparatus (see, for example, Patent Document 1).

Table 03/008321

  In the elevator apparatus described in Patent Document 1, for example, when the car rises beyond a predetermined range, the low friction area provided on the main rope is engaged with the drive sheave of the hoisting machine to The drive sheave of the machine is configured to idle with respect to the main rope. However, since the low friction area of the main rope is fixed at a predetermined position, it cannot be used for purposes other than the above purpose.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus in which a low friction member provided in a part of the main rope of the elevator can be freely arranged according to the application, and An elevator inspection method that is easy to implement in such an elevator apparatus is provided.

  An elevator apparatus according to the present invention includes a main rope that suspends an elevator car and a counterweight in a fishing bottle type, a driving sheave for a hoisting machine around which the main rope is wound, and a detachable attachment to the main rope. And a low friction member having a friction coefficient between the main sheave and the driving sheave that is smaller than that between the main rope and the driving sheave.

  The elevator inspection method according to the present invention includes a step of operating an emergency stop device to fix an elevator car to a guide rail for a car, and a low friction member is attached to a predetermined position of a main rope for suspending the car. A step of rotating the driving sheave in a direction in which the car descends in a state where the low friction member is wound around the driving sheave of the hoisting machine, and relaxing the main rope; and And a step of removing.

  The present invention relates to a main rope for suspending an elevator car and a counterweight in a fishing bottle type, a drive sheave for a hoisting machine around which the main rope is wound, a detachable installation on the main rope, The low friction member provided in a part of the main rope of the elevator is adapted to the application by having a configuration with a low friction member whose friction coefficient between the main rope and the driving sheave is smaller than that between the main rope and the drive sheave. Can be arranged freely.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

  First, based on FIG.1 and FIG.2, the load which acts on the main rope of the general elevator apparatus which employ | adopted the traction system is demonstrated. 1 and 2, reference numeral 1 denotes a car that moves up and down in the elevator hoistway 2, 3 denotes a counterweight that moves up and down in the hoistway 2 in the opposite direction to the car 1, and this counterweight 3 is The weight is adjusted so as to be approximately equal to the weight of the entire car 1 in a state where half of the passengers are on the car 1. In addition, the car 1 and the counterweight 3 include a car guide rail (not shown in FIGS. 1 to 4) and a counterweight guide rail (not shown) standing in the hoistway 2. Each movement in the horizontal direction is restricted, and each elevating direction is guided.

  4 is connected to a car 1 at one end, and a counterweight 3 is connected to the other end, and a main rope for hanging the car 1 and the counterweight 3 in a fishing bottle type, 5 is installed above the hoistway 2 A part of the main rope 4 is wound around a rope groove formed on the outer peripheral surface of the drive sheave 5. Then, when the driving sheave 5 of the hoisting machine is rotated, the driving sheave 5 is rotated by the frictional force generated between the main rope 4 wound around the sheave groove of the driving sheave 5 and the sheave groove. Move in conjunction with. That is, the car 1 and the counterweight 3 suspended from the main rope 4 move up and down in the hoistway 2 in opposite directions.

  In addition, 6 is a deflector that is installed above the hoistway 2 and the main rope 4 is wound around, 7 is an elevator hall provided on each floor of the building, and 8 is erected in the pit portion of the hoistway 2 When the car 1 collides with the bottom surface of the hoistway 2, the car shock absorber 9 is lifted / lowered immediately below the car 1 so as to reduce the impact and protect the passengers in the car 1. The balance weight buffer is provided at the pit portion of the road 2 and is disposed immediately below the balance weight 3 so as to reduce the impact when the balance weight 3 collides with the bottom surface of the hoistway 2.

  Next, the load acting on the main rope 4 that suspends the car 1 and the counterweight 3 will be described in detail. FIG. 1 shows the state of the elevator during normal operation. The car 1 and the counterweight 3 are respectively arranged in ranges that can be raised and lowered during normal operation and are suspended from the main rope 4. In the following, a case where the weight of the car 1 becomes heavier than the weight of the counterweight 3 due to passengers getting on the car 1 will be described. In FIG. 1, T1 is a tension acting on the main rope 4 on the car 1 side (heavy side), and T2 is a tension acting on the main rope 4 on the counterweight 3 side (light side). As described above, there is a relationship of T1> T2. In such a case, that is, during normal operation of the elevator, the travel distance of the car 1 must be accurately controlled based on the number of rotations of the drive sheave 5 of the hoisting machine. Therefore, it is necessary to satisfy the following expression so that no slip occurs between the ropeway of the drive sheave 5 and the main rope 4.

(Formula 1)
T1 / T2 <exp (μ · f · θ)
Here, μ is a coefficient of friction between the driving sheave 5 and the main rope 4, f is a coefficient (groove coefficient) indicating the contact pressure between the driving sheave 5 and the main rope 4, and θ is the main rope 4 with respect to the driving sheave 5. If Formula 1 is not satisfied, slip occurs between the driving sheave 5 and the main rope 4, and the position of the car 1 cannot be accurately controlled.

  FIG. 2 shows a state where the main rope 4 on the side of the counterweight 3 is relaxed due to the counterweight 3 colliding with the counterweight buffer 9 in the pit portion of the hoistway 2 for some reason. In FIG. 2, T2 'indicates the tension on the counterweight 3 side (light side) that acts on the main rope 4 itself due to its own weight. In this case, in order to prevent the car 1 from colliding with the ceiling surface of the hoistway 2, it is required that the car 1 does not rise any further even if the driving sheave 5 of the hoisting machine rotates. That is, it is necessary to satisfy the following expression.

(Formula 2)
T1 / T2 ′> exp (μ · f · θ)
From Equations 1 and 2, in the traction type elevator apparatus, the following equation must be established.

(Formula 3)
T1 / T2 <exp (μ · f · θ) <T1 / T2 ′
That is, in order to establish Equation 3, it is necessary to make the value of T1 / T2 as small as possible and the value of T1 / T2 ′ as large as possible.

  On the other hand, the torque Tq necessary for the hoist (not shown) of the hoist that drives the drive sheave 5 in order to establish the above-described formula 2 is as follows.

(Formula 4)
Tq ≧ (T1-T2 ′) × R
That is,
Tq ≧ T1 × (1-1 / exp (μ · f · θ)) × R
It becomes. Here, R indicates the radius of the drive sheave 5. Therefore, even when the expression 3 is satisfied, if the T1 and the friction coefficient μ are large, the value of the torque Tq necessary for the drive unit inevitably increases.

Embodiment 1 FIG.
3 is a configuration diagram of the elevator apparatus according to Embodiment 1 of the present invention, and FIG. 4 is a detailed view of part A in FIG. 3 and 4, reference numeral 10 denotes a low friction member that can be attached to and detached from an arbitrary position of the main rope 4. The low friction member 10 is configured such that the friction coefficient μ ′ with the rope groove of the drive sheave 5 is smaller than the friction coefficient μ between the main rope 4 and the rope groove of the drive sheave 5. That is, the relational expression of μ ′ <μ is satisfied. Here, the low friction member 10 is made of, for example, a material such as a fluorine resin, and is configured in a tape shape that can be easily attached to and detached from the main rope 4. In addition, when the fluororesin tape (low friction member 10) which has such a structure is attached to the main rope 4 which covered resin, such as urethane, and improved traction capability, the rope of the main rope 4 and the drive sheave 5 While the friction coefficient μ with the groove shows a value of about 0.5, the friction coefficient μ ′ between the low friction member 10 and the rope groove of the drive sheave 5 is reduced to about 0.1 to 0.2. It becomes possible.

  4 and 5, the low-friction member 10 moves up the car 1 beyond the lifting range during normal operation, and the counterweight 3 comes into contact with the counterweight buffer 9 so that the counterweight buffer The main rope 4 is provided so as to engage with the rope groove of the driving sheave 5 from the car 1 side for the first time when 9 is fully compressed. Here, the low friction member 10 is attached so as to cover the entire circumferential direction of the main rope 4. In the traction type elevator apparatus having such a configuration, the low friction member 10 is not wound around the sheave groove of the drive sheave 5 during normal operation of the elevator. The condition under which no slip occurs is calculated by Equation 1.

  On the other hand, when the counterweight 3 collides with the counterweight buffer 9 in the pit portion of the hoistway 2 for some reason, the low friction member 10 is engaged with the rope groove of the driving sheave 5, so that the car 1 is raised. The condition for preventing is given by the following equation.

(Formula 5)
T1 / T2 ′> exp (μ ′ · f · θ)
Here, since the relational expression of μ ′ <μ holds as described above, the value of T1 / T2 ′ can be made smaller than the value of T1 / T2 ′ in Expression 2. That is, in an elevator apparatus that is not provided with the low friction member 10, in order to establish Equation 3, it is necessary to increase the value of T1 / T2 'as much as possible by weighting the car 1. On the other hand, in the elevator apparatus according to the first embodiment, T1 / T2 ′ can be reduced, so that the weight of the car 1 can be reduced.

  Moreover, in order to establish Formula 5, torque Tq 'required for the drive machine of the winding machine which drives the drive sheave 5 is as follows.

(Formula 6)
Tq ′ ≧ T1 × (1-1 / exp (μ ′ · f · θ)) × R
Here, since the relational expression of μ ′ <μ holds as described above, the value of Tq ′ can be made smaller than the value of Tq in Expression 4. That is, by providing the low friction member 10, it is possible to reduce the torque required for the drive machine of the hoisting machine. In addition, when the car 1 is reduced in weight, the value of T1 is reduced, so that the torque required for the driving machine is further reduced and the driving machine can be reduced in size.

Next, an elevator inspection method using the low friction member 10 will be described.
5 and 6 are diagrams for explaining an elevator inspection method according to Embodiment 1 of the present invention. 5 and 6, reference numeral 11 denotes a car guide rail for guiding the car 1 in the ascending / descending direction, and reference numeral 12 denotes an emergency stop device which is one of safety devices. The emergency stop device 12 is a device for stopping the lowering of the car 1 when the main rope 4 is cut or the lowering speed of the car 1 is significantly increased due to other unpredictable reasons. An emergency stop provided at the bottom of the car 1, an endless governor rope (not shown) connected to the emergency stop, and the governor rope is gripped when the movement speed of the governor rope exceeds a predetermined value. And the governor to stop the movement. Then, the movement of the governor rope is stopped by the governor, whereby an emergency stop is operated, and the emergency stop sandwiches the car guide rail 11 with a strong force and stops the lowering of the car 1.

  In Japan, in order to confirm that the car 1 is securely fixed to the car guide rail 11 when the emergency stop device 12 is operated, the car 1 is fixed to the car guide rail 11 by the emergency stop. In this state, the driving sheave 5 is forcibly rotated in the direction in which the car 1 is lowered, and the portion of the main rope 4 from the car 1 to the driving sheave 5 is relaxed to cause the driving sheave 5 to run idle. Is done. The inspection method will be described in detail below.

  The elevator maintenance worker first stops the elevator car 1 at a predetermined floor. Then, the car 1 is fixed to the car guide rail 11 by operating the safety device 12. Next, the low friction member 10 attached to the car 1 side of the main rope 4 is removed from the main rope 4 so as not to engage with the drive sheave 5 of the hoisting machine during normal operation of the elevator, and the removed low friction member is removed. 10 is attached to the main rope 4 arranged between the driving sheave 5 and the deflector 6. Then, the driving sheave 5 is rotated in the direction in which the car 1 descends, and the main rope 4 is moved until the low friction member 10 is wound around the driving sheave 5. The friction coefficient μ between the main rope 4 and the sheave groove of the drive sheave 5 shows a large value, so that the drive sheave 5 rotates idly before the low friction member 10 is wound around the drive sheave 5. There is nothing wrong.

  Then, in a state where the low friction member 10 is wound around the drive sheave 5, the drive sheave 5 is forcibly rotated in the direction in which the car 1 descends, so that the drive sheave 5 of the main rope 4 to the car 1. Loose part. FIG. 6 shows a state in which the portion of the main rope 4 is relaxed. Here, when the car rope 1 is lowered without the main rope 4 being loosened when the driving sheave 5 is rotated, it is determined that the emergency stop device 12 does not operate normally, and the emergency stop device. Maintenance such as 12 repairs and replacements is performed. When it is determined that the safety device 12 operates normally, the low friction member 10 is removed from the main rope 4 after the inspection is completed, and is attached to the original position again.

  In the above inspection, the torque Tq ′ of the hoisting machine drive necessary for causing the drive sheave 5 to run idle is given by Equation 6. That is, when the same inspection is performed in an elevator apparatus that is not provided with the low friction member 10, the torque required for the driving machine is the value of Tq in Equation 4, and thus by providing the low friction member 10, It is possible to reduce the torque required for the drive machine.

  In the above inspection, the low-friction member 10 provided in advance on the main rope 4 is removed, and the removed low-friction member 10 is reattached to a predetermined position of the main rope 4. 4 may be attached to the main rope 4 at the time of inspection without removing the low friction member 10 provided in advance in FIG. In such a case, the low friction member 10 provided in advance on the main rope 4 does not need to be detachable from the main rope 4, but the low friction member 10 used at the time of inspection is easily detached from the main rope 4 after the inspection. It is necessary to have a configuration that can.

It is a figure explaining the load which acts on the main rope of an elevator. It is a figure explaining the load which acts on the main rope of an elevator. It is a block diagram of the elevator apparatus in Embodiment 1 of this invention. FIG. 4 is a detailed view of part A in FIG. 3. It is a figure explaining the inspection method of the elevator in Embodiment 1 of this invention. It is a figure explaining the inspection method of the elevator in Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Hoistway 3 Balance weight 4 Main rope 5 Drive sheave 6 Brake wheel 7 Platform 8 Car shock absorber 9 Counterweight shock absorber 10 Low friction member 11 Car guide rail 12 Emergency stop device

Claims (4)

  A main rope that suspends an elevator car and a counterweight in a fishing bottle type, a driving sheave of a hoisting machine around which the main rope is wound, and a detachable attachment to the main rope. An elevator apparatus comprising: a low friction member having a friction coefficient between the main rope and the drive sheave that is smaller than that between the main rope and the drive sheave   The low friction member is disposed at a position where it does not engage with the drive sheave during normal operation of the elevator, and engages the drive sheave from the car side when the car rises beyond the liftable range. The elevator apparatus according to claim 1.   A step of fixing an elevator car to a guide rail for a car by operating an emergency stop device, a step of attaching a low friction member to a predetermined position of a main rope for suspending the car, and the low friction member is a hoisting machine A step of rotating the drive sheave in a direction in which the car descends while being wound around the drive sheave, and relaxing the main rope; and removing the low friction member from the main rope. An elevator inspection method characterized by comprising: Activating the emergency stop device to fix the elevator car to the car guide rail, and low friction attached to the main rope in place so that it does not engage the hoist drive sheave during normal elevator operation Removing the member from the main rope and attaching the low friction member to a different predetermined position of the main rope; and when the low friction member is wound around the driving sheave of the hoisting machine, An elevator inspection method comprising: rotating the drive sheave in a descending direction to relax the main rope; and removing the low friction member from the main rope.

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