JPS6260353B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a so-called low-floor elevator system installed in a low-floor building, for example, about three stories. This invention relates to a floor elevator device.

[Prior art]

Generally, elevator equipment has a machine room at the top of the hoistway, a hoist is installed in this machine room, and a rope is wound around the hoist in a hanging manner, and a car is attached to one end of the rope. Either a counterweight is connected to the end of the car to raise and lower the car, or a hydraulic jack is provided in the hoistway, and a machine room is provided near the hoistway in which a drive device for driving the hydraulic jack is installed, and the hydraulic jack is installed in the hoistway. The car is raised or lowered directly or indirectly by the jack.

In any case, a machine room is required to raise and lower the car, so the building must be designed with the machine room in mind, and this is not desirable since the machine room protrudes from the outside. do not have.

In addition, when looking at the cross section of the hoistway, in addition to the space for raising and lowering the car, there is also a space for raising and lowering the counterweight, and in the case of an indirect hydraulic elevator, a space for installing a hydraulic jack. required a fairly wide hoistway cross-section.

For this reason, one of the major challenges when installing elevators is to reduce the size of the machine room and hoistway in consideration of building construction. In particular, recently, elevators have been installed in low-floor buildings of around 3 stories. Highly desired.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object thereof is to provide a low-floor elevator system in which the machine room and the hoistway can be reduced.

[Summary of the invention]

The present invention suspends a car from one end of a rope, wraps the other end of the rope around a winding drum installed at the bottom of the hoistway via a pulley at the top of the hoistway, and drives the hoistway to drive the car. In a low-floor elevator device for raising and lowering a car, the winding drum has a winding start side end of the rope aligned with the pulley in plan view, and a drive that drives the winding end side end of the rope and the winding drum. The above object is achieved by arranging the device so as to be located within the car in a two-dimensional manner.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. Entrance/exit 2 located opposite each floor of the building
A hoistway 1 is formed, and two guide rails 3 are fixed to a hoistway wall 1W facing the entrance/exit 2 of this hoistway 1. A door 4D is placed on these two guide rails 3 at a position facing the entrance/exit 2.
A car 4 provided with a car is guided in the vertical direction.
On the other hand, a rope winding device 5 is installed at the bottom 1P of the hoistway 1.
is installed. The rope winding device 5 includes a winding drum 6 for winding the rope, and a drive device 7 including an electric motor and a speed reducer for driving the winding drum 6. When viewed from above, this rope winding device 5 is arranged so that most of it is inside the car 4, and only the end of the winding drum 6 on the side opposite to the drive device protrudes from inside the car 4. It is located. Further, an end portion is provided above the hoistway wall 1W facing the entrance/exit 2 of the hoistway 1, for example, at a position substantially opposite to the upper end of the car 4 stopped at the top floor, so as to coincide with the end of the winding drum 6. A pulley 8 on which is arranged is rotatably attached. One end of the rope 9, which has one end connected to the winding drum 6, is connected via the pulley 8 to a hanging frame 4F provided under the floor of the car 4. When connecting the rope 9, as shown in FIGS. 1 and 2, the rope 9 is positioned at the beginning of winding of the winding drum 6 when the car 4 is located at the lowest floor position. The length of the rope 9 is set to . The winding start side of the winding drum 6 is the side that protrudes from inside the car 4 when viewed in plan, and the winding end side is naturally the side that approaches the drive device 4.

Since the elevator device is configured as described above, when raising the car 4, the rope winding device 5 is driven to wind up the rope 9 from the states shown in FIGS. 1, 2, and 5. Bye. Figure 1,
As shown in FIG. 2, when the car 4 is at the lowest floor, the rope 9A stretched between the pulley 8 and the winding drum 6 is located in the gap between the car 4 and the hoistway wall 1W, There is no obstacle to the rise of On the other hand, the rope 9B stretched between the hanging frame 4F and the pulley 8 is also naturally located in the gap between the car 4 and the hoistway wall 1W.

The car 4 rises as the rope 9 is wound by the rope winding device 5, and the rope 9 is wound on the winding drum 6 toward the drive device 7. Therefore, when viewed from above, the rope 9 wound on the winding drum 6 gradually enters directly under the car 4 as the car rises, and when the car 4 stops at the top floor, As shown in FIGS. 3, 4, and 6, the end of the rope on the winding drum 6 is located directly below the approximately central position of the car. However, when the rope 9A between the pulley 8 and the winding drum 6 starts winding, the rope 9
The angle of inclination θ with respect to A′ (two-dot chain line in FIG. 3) is small, and as a result, the plane displacement of the rope 9A between the lower end of the car 4 and the shaft wall 1W is the same as that between the car 4 and the shaft wall 1W. This is within the gap between the rope 9A and the wall 1W, and the rope 9A does not come into contact with the car 4.

When lowering the car 4, the winding drum 6 of the rope winding device 5 may be rotated in the opposite direction to unwind the car, and the rope 9A will naturally be lowered as the car descends. Since it gradually moves to the winding start side on the winding drum 6, it does not become an obstacle.

As explained above, since the rope winding device 5 is installed in the bottom 1P of the hoistway 1, there is no need to form a machine room near the bottom of the hoistway, and therefore the cross section of the hoistway 1 is similar to that of the car. 4, which simplifies the design and construction of the hoistway 1.

The winding start side end of the winding drum 6 of the rope winding device 5 is made to almost coincide with the pulley 8 attached to the hoistway wall 1W, in other words, the winding start side rope groove of the winding drum 6 and the rope of the pulley 8 are aligned. Since the end of the winding drum 6 is positioned inside the car 4 in a plan view, the rope 9 can be easily wound when the car 4 is raised or lowered. Therefore, most of the rope winding device 5 can be placed within the car 4 when viewed from above, and the space at the bottom 1P of the hoistway can be used effectively. Therefore, there is no need for the hoistway bottom 1P to have a special shape compared to other hoistway cross-sectional parts.

Incidentally, in the above embodiment, for convenience of explanation, the car 4 is raised and lowered by winding and unwinding one rope 9, but for safety reasons, two or more ropes 9 may be used. This is stipulated by law, and therefore, in practice, at least two rope grooves are formed on the outer periphery of the winding drum 6. In the case of the winding drum arrangement shown in FIGS. 1 to 6, in which the axial direction of the winding drum 6 coincides with the direction of the gap between the hoistway wall 1W to which the pulley 8 is attached and the car 4, Of course, the two rope grooves are formed in parallel from the winding start side to the winding end side.

Furthermore, the above embodiment has a hanging frame 4F under the car 4.
is provided, and the rope 9 is connected to this for hanging. However, the suspension is not limited to the hanging frame 4F, and as shown in FIGS. 7 and 8, the car frame 10 is suspended. This can also be applied to a case where a rope 9 is connected to the center of the upper part and suspended. In this case, it is necessary to provide two pulleys 11A and 11B in the hoistway 1 above the car frame 10 instead of the pulley 8 provided on the hoistway wall 1W. However, shortening the length of the hoistway and reducing the cross section of the hoistway can be achieved in the same manner as in the above embodiments.

〔Effect of the invention〕

As explained above, according to the present invention, the machine room can be eliminated and the cross-sectional area of the hoistway can be reduced, so that it is possible to obtain a low-floor elevator system whose building can be easily designed.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing a low floor elevator device according to the present invention, Fig. 2 is a longitudinal front view of the same, and Figs. 3 and 4 have different car positions from Figs. 1 and 2, respectively. A vertical side view and a vertical front view, FIGS. 5 and 6 are cross-sectional enlarged plan views showing the bottom of the hoistway of a low-floor elevator device according to the present invention, and FIG. 7 is a cross-sectional enlarged plan view showing another embodiment according to the present invention. FIG. 8 is a longitudinal sectional side view, and FIG. 8 is a longitudinal sectional front view thereof. 1... hoistway, 3... guide rail, 4... car, 5... rope winding device, 6... winding drum, 7...
...Drive device, 9...Rope.

Claims (1)

[Claims] 1. A hoistway, a guide rail installed in the hoistway, a car that goes up and down along the guide rail, a rope from which the car is suspended at one end, and a rope attached above the hoistway. A pulley around which the other end of the rope is wound and suspended along the side wall of the hoistway, a winding drum installed at the bottom of the hoistway that winds the other end of the rope, and a drive device that drives this winding drum. In the elevator device for low floors, the winding drum aligns the winding start end of the rope with the pulley in a plane, and connects the winding end of the rope with the drive device in a plane. An elevator device for low floors characterized by being arranged so as to be located inside the car.