WO2006123393A1

WO2006123393A1 - Elevator device

Info

Publication number: WO2006123393A1
Application number: PCT/JP2005/008889
Authority: WO
Inventors: Takenobu Honda
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-05-16
Filing date: 2005-05-16
Publication date: 2006-11-23
Also published as: EP1882667A4; JPWO2006123393A1; EP1882667A1; CN1976856A

Abstract

An elevator device has a damping device mounted on a lower part of the vertically moving body that is lifted and lowered in a hoistway, and the damping device damps an impact of a collision of the vertically moving body against a lower part of the hoistway. A part of the damping device is projected below from the lower end of the vertically moving body, and the part is greater in length than the length of a stroke of the damping device. The remaining portion of the damping body is placed within the range of the vertical dimension of the vertical moving body.

Description

Specification

Elevator equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to an elevator apparatus having a shock absorber for mitigating the impact of a collision of a lifting body such as a car and a counterweight against a lower part of a hoistway.

Background art

In a conventional elevator device, a car shock absorber is installed at the lower part of the hoistway, and a counterweight shock absorber is attached to the lower part of the counterweight (for example, see Patent Document 1). ).

[0003] Patent Document 1: Japanese Utility Model Publication No. 59- 192085

Disclosure of the invention

Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, whether the counterweight buffer is mounted on the counterweight or installed at the lower part of the hoistway, the hoisting range of the counterweight is equal to the total length of the hoistway. The height of the counterweight is limited by the length of the counterweight buffer because the total length of the counterweight buffer is within the range of the total weight. In particular, in a machine room-less elevator in which equipment such as a drive device is arranged at the upper part in the hoistway, the height of the counterweight is also limited by the equipment arranged at the upper part in the hoistway. Therefore, when it is necessary to increase the weight of the counterweight, for example, when the design part of the car is heavy, it is necessary to increase the width and thickness of the counterweight, which is difficult to cope with.

[0005] 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 that can relax the restriction on the height dimension of the lifting body.

Means for solving the problem

[0006] An elevator apparatus according to the present invention includes a lifting body that is lifted and lowered in a hoistway, and a shock absorber mounted at a lower portion of the lift body. Projecting downward from the lower end, the remaining part of the shock absorber is arranged within the vertical dimension of the lifting body. Brief Description of Drawings

FIG. 1 is a side view showing an elevator apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing the counterweight of FIG.

FIG. 3 is a front view showing a counterweight of an elevator apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a side view showing a car of an elevator apparatus according to Embodiment 3 of the present invention.

FIG. 5 is a plan view showing the car of FIG. 4.

BEST MODE FOR CARRYING OUT THE INVENTION

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

Embodiment 1.

FIG. 1 is a side view showing an elevator apparatus (machine room-less elevator) according to Embodiment 1 of the present invention. In the figure, a driving device (lifting machine) 2 is installed in the upper part of the hoistway 1. The drive device 2 includes a drive device body 3 including a motor and a brake, and a drive sheave 4 rotated by the drive device body 3. The driving device 2 is arranged so that the rotation axis of the driving sheave 4 is vertical or almost vertical. Further, as the driving device 2, a thin hoisting machine having an axial dimension smaller than a dimension perpendicular to the axial direction is used.

[0009] A plurality of ropes 5 (only one is shown in the figure) are wound around the drive sheave 4. A cage 6, which is a lifting body, is connected to the first end of the rope 5. The second end of the rope 5 is connected to a counterweight 7 that is a lifting body. The force 6 and the counterweight 7 are suspended in the hoistway 1 by the rope 5 in a 1: 1 roving manner, and are raised and lowered in the hoistway 1 by the driving force of the driving device 2.

In the hoistway 1, a pair of car guide rails 8 that guide the lifting and lowering of the force 6 and a pair of counterweight guide rails 9 that guide the lifting and lowering of the counterweight 7 are installed. The counterweight 7 is arranged behind the car 6 so as to face the back of the car 6 when it is located at the same height as the car 6.

[0011] In the upper part of the hoistway 1 are a car-side guide pulley 10 for guiding the rope 5 from the drive sheave 4 to the car 6 and a counterweight-side guide pulley 11 for guiding the rope 5 from the drive sheave 4 to the counterweight 7 11 When Is arranged. The guide pulleys 10 and 11 are arranged so that their rotational axes are horizontal. Further, the hoistway upper devices such as the driving device 2 and the guide pulleys 10 and 11 are supported by a common upper support beam (not shown). The upper support beam is supported by the upper part of at least one of the car guide rail 8 and the counterweight guide rail 9, or the fixed part of the building.

[0012] At the lower part (pit) of the hoistway 1, a car shock absorber 12 for reducing the impact of the collision of the car 6 with the lower part of the hoistway 1 is installed. At the bottom of the counterweight 7 is mounted a counterweight buffering device 13 that reduces the impact of the counterweight 7 colliding with the lower part of the hoistway 1.

FIG. 2 is a front view showing the counterweight 7 in FIG. The counterweight buffer 13 includes first and second counterweight buffers 14 and 15 arranged in parallel to each other so as to simultaneously perform buffering operations. The first and second counterweight shock absorbers 14 and 15 are shock absorbers having the same capacity and the same stroke length. The first and second counterweight buffers 14 and 15 are arranged symmetrically with respect to the center line in the width direction of the counterweight 7.

A guide rail base 16 is fixed to the lower part of the hoistway 1. The lower end of the counterweight guide rail 9 is fixed on the guide rail base 16. The guide rail base 16 also serves as a shock absorber support for receiving the counterweight shock absorbers 14 and 15.

[0015] The counterweight 7 includes a weight frame 17, a plurality of weight plates 18 stacked in the weight frame 17, and a plurality of weight guides that are attached to the weight frame 17 and engage the counterweight guide rail 9. Shu 19. The counterweight shock absorbers 14, 15 are attached to the weight frame 17.

[0016] In addition, each counterweight buffer 14, 15 has a portion longer than the stroke length protruding downward from the lower end of the counterweight 7, and the remaining portion has a vertical dimension of the counterweight 7. It is located within the range. That is, the upper ends of the counterweight buffers 14 and 15 are located above the lower end of the counterweight 7. In this example, the amount of protrusion from the lower end of the counterweight 7 of each counterweight buffer 14, 15 is substantially the same as the stroke length.

Furthermore, as the counterweight buffer 14, 15, for example, a spring type shock absorber is used. Furthermore, the counterweight buffers 14 and 15 are attached to the weight frame 17 so that the spring portion is located at the lower end. [0018] In the elevator apparatus as described above, the counterweight buffers 14, 15 are mounted on the counterweight 7, and a part of the counterweight buffers 14, 15 is the vertical direction of the counterweight 7. Since it is arranged within the dimension range, the restriction on the height dimension of the counterweight 7 can be relaxed, and the height dimension of the counterweight 7 can be increased. This makes it possible to easily cope with cases where the counterweight 7 needs to be heavy, such as when the design part of the force 6 is heavy.

[0019] Further, since the weight of the counterweight buffer 13 is added to the weight of the counterweight 7, the amount of the weight plate 18 can be reduced.

In addition, since two counterweight buffers 14 and 15 were used, each counterweight buffer 14 and 15 should be downsized to reduce the installation space for counterweight buffers 14 and 15 in the counterweight 7. Can do.

[0020] The counterweight buffers 14, 15 may be attached to the counterweight 7 with the springs up.

[0021] Embodiment 2.

Next, FIG. 3 is a front view showing a counterweight 7 of the elevator apparatus according to Embodiment 2 of the present invention. In the figure, the counterweight buffer 13 includes first and second counterweight buffers 21 and 22 arranged in parallel to each other so as to perform a buffering operation at the same time. The first and second counterweight shock absorbers 21 and 22 are shock absorbers having the same capacity and the same stroke length. The first and second counterweight buffers 21, 22 are arranged symmetrically with respect to the center line of the counterweight 7 in the width direction! Speak.

[0022] In addition, each counterweight buffer 21, 22 has a portion with a stroke length S or more protruding downward from the lower end of the counterweight 7, and the remaining portion is the vertical dimension of the counterweight 7. It is arranged within the range of. In this example, the protruding amount of the lower end force of the counterweight 7 of each counterweight buffer 21, 22 is almost the same as the stroke length S.

[0023] Further, as the counterweight shock absorbers 21, 22, for example, hydraulic shock absorbers are used.

Furthermore, the counterweight buffers 21 and 22 are attached to the weight frame 17 so that the plunger is located at the upper part and the cylinder is located at the lower part. Other configurations are the same as those in the first embodiment. [0024] Thus, even when a hydraulic shock absorber is used as the counterweight buffer 21, 22, a part of the counterweight buffer 21, 22 is part of the vertical dimension range of the counterweight 7. By placing it inside, the restriction on the height dimension of the counterweight 7 can be relaxed, and the height dimension of the counterweight 7 can be increased.

[0025] In the second embodiment, the force with the counterweight buffer 21 and 22 mounted on the counterweight 7 so that the plunger is positioned at the top and the cylinder is positioned at the bottom is the counterweight buffer 21, 22 May be attached to the counterweight 7 upside down.

Embodiment 3.

Next, FIG. 4 is a side view showing a car 6 of an elevator apparatus according to Embodiment 3 of the present invention, and FIG. 5 is a plan view showing the car 6 of FIG. In the figure, the car 6 has a force car frame 23 and a car room 24 supported by the car frame 23. The car frame 23 has a pair of vertical columns arranged on the left and right sides of the car room 24!

[0027] First and second shock absorber mounting bases 25 and 26 are fixed to the vertical column of the car frame 23. First and second car shock absorbers 27 and 28 are attached to the first and second shock absorber mounting bases 25 and 26, respectively. The car shock absorber 29 includes first and second car shock absorbers 27 and 28.

[0028] The first and second car shock absorbers 27 and 28 are arranged in parallel to each other so as to perform a buffering operation at the same time. The first and second car shock absorbers 27 and 28 are shock absorbers having the same capacity and the same stroke length. Further, on the vertical projection plane, the first and second car shock absorbers 27 and 28 are arranged symmetrically with the center of gravity of the car 6 as the center.

A guide rail base 30 is fixed to the lower part of the hoistway 1. The lower end of the car guide rail 8 is fixed on the guide rail base 30. A pair of shock absorber supports 31 for receiving the car shock absorbers 27 and 28 are fixed to the guide rail base 30.

[0030] Further, in each of the car shock absorbers 27 and 28, a part longer than the stroke length protrudes downward from the lower end of the car 6, and the remaining part is arranged within the vertical dimension of the car 6. The In this example, the protruding amount of the lower end force of the car 6 of each car shock absorber 27, 28 is almost the same as the stroke length.

Further, as the car shock absorbers 27 and 28, for example, spring-type shock absorbers are used. More In addition, the car shock absorbers 27 and 28 are attached to the shock absorber mounting bases 25 and 26 so that the spring portions are located at the lower end portions.

[0032] In the elevator apparatus as described above, the car shock absorbers 27 and 28 are mounted on the car 6, and part of the car shock absorbers 27 and 28 are disposed within the vertical dimension of the car 6. Therefore, the restriction on the height dimension of the force 6 can be relaxed, and the height dimension of the force 6 can be increased.

[0033] In the above example, two counterweight buffer units or two cage buffer units are used, but one or three or more buffer units may be used.

In addition, the present invention can be applied to only one of the counterweight and the car or both.

Further, in the above example, the force roping method showing the 1: 1 roving type elevator apparatus is not limited to this, but may be, for example, a 2: 1 roving method. Furthermore, in the above example, the elevator apparatus in which the counterweight is arranged behind the car is shown, but the present invention can also be applied to an elevator apparatus in which the counterweight is arranged beside the car.

In the above example, an elevator apparatus using one counterweight is shown. However, the present invention can also be applied to an elevator apparatus using a plurality of counterweights.

Claims

The scope of the claims

[1] a lifting body that is raised and lowered in the hoistway;

A shock absorber mounted on the lower part of the lifting body

With

In the shock absorber, a portion longer than the stroke length protrudes downward from the lower end of the lifting body, and the remaining portion of the shock absorber is disposed within the vertical dimension of the lifting body. Elevator equipment.

2. The elevator apparatus according to claim 1, wherein the shock absorber includes a plurality of shock absorbers arranged in parallel with each other so as to perform a shock absorbing operation simultaneously.