JPH0373782A - Screw drive type elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a screw-driven elevator, and more particularly to a screw-driven elevator in which a car is driven via a rope.

<Prior Art> Conventionally, as described in, for example, JP-A-54-120152 and JP-A-52-88952, threaded rods are installed upright over the entire length of a hoistway, and threaded rods are installed at the bottom of the hoistway. The screw rod is installed and has a drive device for driving the threaded rod, a cage frame to which a nut screwed onto the threaded rod is fixedly installed, and a cage supported by the cage frame, and the threaded rod is driven by the drive device. A screw-driven elevator has been proposed in which the car frame and the car are moved up and down in the hoistway via a nut.

Furthermore, as described in Japanese Utility Model Application Publication No. 54-166663, for example, a support stand installed at the bottom of the hoistway, a hydraulic jack supported by the support stand and erected in the hoistway, and a hydraulic jack installed in the hoistway. A pulley rotatably installed on the upper end of the plunger of a hydraulic jack, a rope wrapped around the pulley, one end locked in a predetermined position and the other end connected to the car frame, and a car supported by the car frame. A hydraulically driven elevator has been proposed, which moves a car frame and a car up and down in a hoistway via a rope as the plunger moves up and down.

<Problems to be Solved by the Invention> By the way, in the above-mentioned conventional technology, in the former screw-driven elevator, a threaded rod that is erected over the entire length of the hoistway is fixed to the car frame at the middle part. The nut moves while being screwed together, and the upper and lower parts of the threaded rod are supported by the support mechanism, so it is necessary to set the length of the threaded rod to be greater than the travel distance of the car. Furthermore, since there is a limit to the length of the threaded rod due to its structure, there is a problem in that due to this limit, the running distance of the car cannot be increased very much due to the above-mentioned reasons.

In addition, in the latter type of hydraulically driven elevator, due to oil leakage, the plunger of the hydraulic jack sinks over time, and the car gradually descends from the landing position. There are problems such as the inability to operate the hydraulic pump, the generation of a peculiar odor from hydraulic oil, and the excessive noise caused by the operation of the hydraulic pump late at night.

The present invention has been made in view of the actual situation in the prior art as described above, and its object is to be able to drive a car via a threaded rod without requiring a threaded rod to be provided over the entire length of the hoistway. The purpose of the present invention is to provide a screw-driven elevator.

<Means for Solving the Problems> In order to achieve this object, the present invention provides a threaded rod installed upright in a hoistway, a drive device for driving this threaded rod, and a drive device that drives the threaded rod in accordance with the operation of the threaded rod. In a screw-driven elevator including a car frame that moves up and down in a hoistway and a car supported by the car frame, the drive device is provided with an actuating means for vertically moving the screw rod, and the upper end of the screw rod A pulley is rotatably installed on the
The rope has one end locked in a predetermined position and the other end connected to the car frame.

Function> Since the present invention is configured as described above, when the threaded rod is raised by the operation of the actuating means provided in the drive device, the bobbin provided at the upper end of the threaded rod rotates and pushes up the intermediate portion of the rope. Along with this, since one end of the rope is locked in a predetermined position, the other end and the car frame and basket to which this other end is connected move twice as far as the pulley. rise. On the other hand, when the tension rod is lowered by the actuation of the actuating means, the cage frame and the car move down a distance twice as much as the pulley movement due to their own weight. In this way, the distance traveled by the pulley is only half of the distance traveled by the car, and as a result, the length of the threaded rod with the pulley at its upper end can be shortened to about half the distance traveled by the car. The car can be driven via a threaded rod without having to provide it over the entire length of the hoistway.

<Example> Hereinafter, an example of the screw drive type elevator of the present invention will be described based on the drawings.

1 and 2 are explanatory diagrams showing one embodiment of the screw-driven elevator of the present invention, in which FIG. 1 is a longitudinal sectional view showing the overall configuration, and FIG. 2 is a side view showing the threaded rod portion. . In addition,
FIG. 2 is an enlarged view corresponding to section A in FIG. 1.

The screw-driven elevator of this embodiment shown in FIG.
A support stand 2 fixed to the bottom of the hoistway 1, a threaded rod 3 erected in the hoistway 1 and movably supported at the top of the support stand 2, and a drive device for driving the threaded rod 3. 4, which is rotatably provided at the upper end of the threaded rod 3 and is connected to the hoistway l.
A pulley 5 (not shown) stands upright inside, a row 16 that is wound around the pulley 5 and has one end locked to the upper end of the support stand 2, and a car frame 7 to which the other end of the rope 6 is connected. , a car 8 supported by the car frame 7, and a guide rail 9 that is erected in the hoistway 1 and guides the car 8.

As shown in FIG. 2, the actuating means 10 provided in the drive device 4 includes a worm 11 which is arranged horizontally and whose tip is inserted into the support stand 2, and a fixing device provided in the support stand 2. a plate 12; a housing 13 disposed on the fixed plate 12 and housing the tip of the worm 11; a gear 14 having meshing teeth; disposed within the housing 13;
A pair of thrust bearings 15 that support the upper and lower parts of the gear 14, respectively, and a cap 1 that covers the upper part of the housing 13.
6, and bolts 17 for attaching the cap 16 to the housing 13. Further, a bearing 18 is fixed to the upper end of the threaded rod 3, and the above-mentioned pulley 5 is attached to this bearing 18.
A shaft 19 is provided that rotatably supports the.

In this embodiment, when the worm 11 is rotated by the drive of the drive device 4, rotational force is transmitted to the threaded rod 3 via the gear 14. At this time, the pulley 5 at the upper end of the threaded rod 3
Since the rope 6 is wrapped around the threaded rod 3, that is, the threaded rod 3 is restrained from rotating, the threaded rod 3 that meshes with the teeth on the inner circumference of the gear 14 moves up and down as the gear 14 rotates. When the threaded rod 3 rises, the pulley 5 at the upper end of the threaded rod 3 pushes up the middle part of the lobe 6. Along with this, since one end of the row 16 is locked to the upper end of the support stand 2, the other end and the car frame 7 and the car 8 to which this other end is connected are guided by the guide rail 9. , for example, from the lowest floor 18 shown in FIG.
Increases the movement distance by twice compared to the movement distance of . on the other hand,
When the threaded rod 3 is lowered by the operation of the actuating means 10,
As the pulley 5 descends, the car frame 7 and the car 8 descend by a distance twice as much as the pulley 5 due to their own weight.

In the embodiment configured in this manner, the moving distance of the pulley 5 is only half the moving distance of the car 8, so the length of the threaded rod 3 having the pulley 5 at the upper end can be shortened to about half the moving distance of the car 8. That is, the car 8 can be driven via the threaded rod 3 without requiring the threaded rod 3 to be provided over the entire length of the hoistway 1.

FIG. 3 is a longitudinal sectional view showing another embodiment of the screw-driven elevator of the present invention. Note that in FIG. 3, parts equivalent to those shown in FIGS. 1 and 2 described above are designated by the same reference numerals.

The actuating means 20 of this other embodiment shown in FIG. It consists of a ball screw nut 22 whose outer periphery meshes with a gear 21.

In this embodiment, the gear 2 is driven by the drive device.
1 rotates, the ball screw nut 22 rotates. Along with this, the threaded rod 3 moves up and down, and the car frame 7 and the car 8 are driven via the row 16, as in the case shown in FIGS. 1 and 2 described above.

In the embodiment configured in this manner, the car 8 can be driven via the threaded rod 3 without requiring the threaded rod 3 to be provided over the entire length of the hoistway, as in the previously described embodiment. In recent years, remarkable progress has been made in technology for controlling the moving speed and position of objects using ball screw mechanisms, so that highly desirable effects can also be obtained for power transmission in elevators as described above.

<Effects of the Invention> Since the screw-driven elevator of the present invention is configured as described above, the car can be driven via the threaded rods without requiring the threaded rods to be provided over the entire length of the hoistway. Therefore, even if there is a restriction on the length of the threaded rod, there is an effect that the moving distance of the car can be set to be large. In addition, power is transmitted from the drive device to the threaded rod by a screw advancing/retracting mechanism via a rigid body.In other words, power is not transmitted via hydraulic oil, so the car can be moved to the landing position regardless of the passage of time. It also has the effect of preventing car operation from being affected by temperature and preventing oil odor and operation noise from occurring.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams showing one embodiment of the screw-driven elevator of the present invention, in which FIG. 1 is a longitudinal sectional view showing the overall configuration, FIG. 2 is a side view showing the threaded rod portion, and FIG. FIG. 3 is a longitudinal sectional view showing another embodiment of the screw-driven elevator of the present invention. DESCRIPTION OF SYMBOLS 1... Hoistway, 2... Support bracket, 3... Threaded rod, 4... Drive device, 5
...Pulley, 6...Rope, 7...
・・・gago frame、8・・・・・・gago、1o・・・・・・
Actuation means, 11... Worm, 14...
・Gear, 2゜... Actuation means, 21...
Gear, 22...Ball screw nut. Figure 2/l: Warm/4: 81 Figure 1', Ear insertion 2: The support is now up to 3 Nil L° set 1 4:j 5:? -11 6: 'Low Fu 7; Power

Claims (1)

[Claims] (1) A threaded rod installed upright in the hoistway, a drive device that drives the threaded rod, a car frame that moves up and down in the hoistway as the threaded rod operates, and a car frame that is supported by the car frame. In a screw-driven elevator including a car, the driving device is provided with an actuating means for vertically moving the screw rod, and
The present invention is characterized by comprising a pulley rotatably provided on the upper end of the threaded rod, and a rope that is wound around the pulley, one end of which is locked in a predetermined position, and the other end of which is coupled to the car frame. Screw-driven elevator.