JPH0725566A - Elevator - Google Patents

Abstract

PURPOSE:To provide an elevator providing an irreversible driving means on the elevator itself without requiring an elevator cable and a brake. CONSTITUTION:An elevator is constituted by furnishing pinions 3 provided by having an axis of rotation roughly horizontal in the longitudinal direction of the elevator 1 on the left and the right of at least one of portions of an upper part and a lower part of the elevator 1, a rack 4 provided in the vertical direction free to engage with the pinions 3 on left and right walls of a tunnel to elevate the elevator 1 and an irreversible driving means to vertically move the elevator 1 by way of driving the pinions 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator, and more particularly to a drive device for vertically moving (elevating) the elevator.

[0002]

2. Description of the Related Art A conventional elevator is provided with a pulley for vertically reciprocating a cable and its driving means at the top of a tunnel for vertically moving the elevator, for example, on the roof of a building, and the elevator is provided at one end of the cable and a balancer (weight) at the other end. And the pulleys were rotatably driven to move the elevator up and down.

Further, as a safety device, rails are provided above and below the left and right tunnel walls of the elevator, and a lever type roller carriage is connected between the rails and the elevator to connect them to the elevator side. When it was cut, the lever of the roller cart was hung by the weight of the elevator, and the elevator was automatically stopped. The rail also doubled as an elevator shake.

[0004]

The above conventional elevator has the following problems to be solved.

That is, in the conventional elevator, a pulley and a driving device for driving the elevator must be separately provided on the rooftop of a building, and a long cable for reciprocating is required separately from the rails, and these devices need to be installed. Therefore, there is a problem that a large space is required and the cost becomes high.

Further, as a countermeasure against the disconnection of the cable, a safety device must be provided separately, which requires maintenance and inspection separately from the drive device, and causes an increase in cost as an extra device.

Further, since the cable constantly bends and stretches at the pulley portion, there is a problem that strand breakage easily occurs and the durability is short.

To solve the above problems, it is an object of the present invention to provide an elevator in which a non-reciprocal drive means is provided in the elevator itself without using a cable.

[0009]

As a means for solving the above-mentioned problems, the present invention is provided with rotation shafts which are substantially horizontal in the front-rear direction of the elevator at the left and right of at least one of the upper part and the lower part of the elevator. A pinion, a rack vertically installed on the left and right walls of the elevator tunnel for engaging the pinion, and an irreversible drive means for driving the pinion to move the elevator up and down. It is intended to provide an elevator characterized by:

The "non-reciprocal type" means a system in which a driving force can be applied to drive the driving side, but no reaction force (torque) can be applied from the driven side to the driving side. .

[0011]

Since the present invention is constructed as described above, it has the following actions.

That is, a pinion having a rotation axis substantially horizontal in the front-rear direction of the elevator, which is provided on the left and right of at least one of the upper part and the lower part of the elevator, and the left and right walls of the tunnel that can be engaged with the pinion. Since the rack provided in the up-and-down direction and the non-reciprocal driving means for driving the pinion are provided, when the driving means is operated, the pinitone rotates in a state of meshing with the rack, so that the elevator can move up or down. To do. That is, it does not require a cable and can be moved up and down by the driving means provided in itself.

Further, since the elevator is moved up and down by the pinion and the rack without using the cable, the factor of cutting the cable is eliminated, and the reliability is correspondingly increased.

That is, since the vertical movement is performed by the pinion and the rack provided on the left and right, even if one tooth of the pinion or the rack is broken, the vertical movement of the elevator does not cause any trouble. However, there is no such problem as an elevator falling.

Therefore, it is not necessary to separately provide a safety device (provided that the safety device is separately installed).

Further, since the driving means is irreversible, it is possible to unilaterally perform accurate movement and stop only by controlling the driving means, and a brake device for stopping is not required,
There is no concern that the elevator will move due to changes in the weight of the elevator (number of passengers) or other factors.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic perspective view of an elevator according to the present embodiment viewed from an obliquely upper front, and FIG. 2 is a screw shaft 6 and a crown in a gear box 5 on the front side (left side as seen from the elevator) of FIG. It is an enlarged detailed view of the relationship with the gear 7 as seen from the front to the rear of the elevator 1.

In both figures, 1 is an elevator, 2 is an elevator door, 3 is on the left and right above the ceiling of the elevator 1,
A shaft 8 which is symmetrically approximately horizontal in the front-rear direction of the elevator 1.
2 and 3 are provided on the left and right walls of a tunnel (not shown) for elevators 1 and 2, which are provided on the left and right side walls of the elevator 1. Reference numeral 5 denotes a gear box that forms a meshing portion of a screw shaft 6 and a crown gear 7 fixed to the front and rear of the shaft 8 of the pinion 3, and 6 is symmetrically provided from the motor 9 so as to project the crown gear 7 A screw shaft for irreversibly rotating and driving, 7 is a screw shaft 6
A crown gear driven to rotate the front and rear pinions 3 through the shaft 8; a shaft 8 for transmitting the rotation of the crown gear 7 to the pinion 3;
Reference numeral 9 is a motor for rotating the pinion 3 via the screw shaft 6 and the like.

The screw shaft 6 and the crown gear 7 form a pair of so-called screw gears, and the rotation of the screw shaft 6 can transmit the rotation to the crown gear 7, but the crown gear 7 can be transmitted to the screw gear 6. It is an irreversible relationship that cannot exert rotation even with a strong anti-torque.

Next, the operation of the above configuration will be described.

In FIG. 1, when a push button (not shown) for designating a desired floor is pushed in the elevator 1, the motor 9 rotates in that direction, and the rack 4 is passed through the screw shaft 6, the crown gear 7, and the shaft 8. The pinion 3 engaged with is driven to rotate, and the elevator 1 moves up or down to reach a desired floor. Since the method of getting on and off the elevator 1 and the method of driving are the same as the conventional method, the description thereof will be omitted.

As described above, according to this embodiment, the elevator 1 is moved up and down by the pinion 3 and the rack 4, and the cable that bends and expands unlike the conventional case is not used, so that the accident of cutting the cable does not occur. There are advantages.

Further, since the motor 9 as a drive source can all be installed in the elevator 1, it becomes a so-called self-contained device, and there is an advantage that no special equipment needs to be provided on the rooftop of the building.

Further, since the screw shaft 6 for rotating the pinion 3 and the crown gear 7 are non-reciprocal type, if the motor 9 is stopped, the elevator 1 is stopped at that position,
No matter how much load is applied to the pinion 3 due to earthquake vibration, weight fluctuation, etc., the screw shaft 6 will not be rotated from the driven side, and the screw shaft 6 will act as a brake as it is and stop. There is an advantage that the safety and reliability of the above are fulfilled, that is, no brake is required. This is also an advantage that the movement / stop can be completely controlled by a single operation of only the motor 9 without using any device similar to a brake.

Further, in this embodiment, since the pinion 3 and the rack 4 are provided on the left, right, front and rear, even if there is a problem that the teeth of either the left or right pinion 3 or the rack 4 are chipped, the pinion 3 on one side and the rack 4 are removed. As long as the meshing of No. 4 is normal, there is an advantage that the lifting function is not lost, and there is no danger of dropping when the cable is cut in the conventional example.

Further, as described above, no special facility is required on the rooftop of the building, no cable or pulley is required, and
Since the brake device is not required, there is an advantage that the object can be achieved with a smaller space and a smaller number of parts as compared with the conventional example, and manufacturing cost and maintenance cost can be reduced.

In this embodiment, the pinion 3 to the motor 9 are used.
The above description is based on the example in which the above are provided only on the ceiling of the elevator 1,
They may be placed side by side on the bottom surface (rear surface) of the elevator 1, or may be provided only on the bottom surface.

Further, the elevator 1 is not limited to the one for getting on and off a person, but may be of course used for loading cargo or the like.

[0030]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, since the elevator is lifted and lowered by the pinion and the rack instead of the reciprocating movement of the cable as in the conventional case, the safety is improved and the maintenance becomes easy.

Further, since the non-reciprocal drive means is used, no braking device is required.

Since the number of parts is small and the object is achieved in a small space, the reliability is improved and the cost and maintenance cost are reduced.

Since a cable that bends and expands is not used, durability is increased.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an elevator according to an embodiment of the present invention, which is a bird's-eye view from diagonally above and above;

2 is an enlarged detailed view of the relationship between the screw shaft 6 and the crown gear 7 in the gear box 5 on the front side of FIG. 1 as seen from the front to the rear of the elevator 1. FIG.

[Explanation of symbols]

 1 Elevator 2 Door 3 Pinion 4 Rack 5 Gear box 6 Screw shaft 7 Crown gear 8 Shaft 9 Motor

Claims (1)

[Claims] 1. A pinion provided with a rotary shaft that is substantially horizontal in the front-rear direction of the elevator on the left and right of at least one of the upper part and the lower part of the elevator, and the above-mentioned pin on the left and right walls of the elevator tunnel. An elevator comprising: a rack vertically provided so as to be engageable with a pinion; and an irreversible drive means for driving the pinion to vertically move the elevator.