JPH0534280B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elevator drive device for low-rise residential buildings, and particularly relates to an elevator drive device for low-rise residential buildings equipped with a table that is supported by a scissor-shaped link mechanism and moves up and down. .

[Prior Art] Elevator drive systems for low-rise residential buildings that have been commonly used in the past have used scissor-like link mechanisms operated by hydraulic cylinders or screw cylinders because the structure is simple and guide rails are not required. There are many things.

This type of elevator drive system for low-rise residential buildings is
a base; a table provided above the base and movable relative to the base; and a table provided between the base and the table that allows the table to be moved up and down while maintaining a parallel relationship to the base. A telescopic scissor-shaped link mechanism that guides the movement and attached to the scissor-shaped link mechanism,
and an actuation device that expands and contracts the scissor-like link mechanism. The actuating device is usually a hydraulic cylinder or screw cylinder.

Points to note in particular when using an elevator drive system for low-rise residential buildings are that the lift of the elevator system is sufficient at around 3 m because the number of floors in the building is relatively small, that the load of the elevator cannot be applied to the building, and that the elevator It is desirable that the power supply voltage for driving is 100V.

Among these conditions, lift and load problems have been solved even in residential elevator systems using conventional hydraulic cylinders.

[Problems to be Solved by the Invention] However, there is nothing that can use 100V as a power supply voltage for driving an elevator.
In order to operate an elevator at an appropriate speed, the hydraulic pump in the case of a hydraulic cylinder type, and the electric motor in the case of a screw cylinder type, must each be driven with a certain level of power, and the household 100V
Since the power source was insufficient, separate electrical work was required for a power source with a higher power than the household power source. This incurs large costs both during elevator installation and during operation.

In addition, in a single stage elevator drive device,
An elevator device is already known in which a tension spring is disposed between opposing links of a scissor-like link mechanism to reduce the driving force of the operating device (Japanese Patent Laid-Open No. 162495/1983).
Publication No.).

However, if the tensile force of the spring device provided between the scissor-shaped link mechanisms counteracts the driving force of the actuating device, the elastic force of the spring device may act suddenly in some cases, making the elevator operation smooth. There was a problem that it was not done.

This invention was made to solve such problems, and even when using a spring device with a tensile force that competes with the driving force of the actuating device, it ensures smooth table movement. The purpose of the present invention is to provide an elevator drive system for low-rise residential buildings that has a long service life.

[Means for Solving the Problems] In order to solve such problems, the elevator driving device for low-rise residential buildings of the present invention includes a base, and an elevator that is provided above the base and is movable with respect to the base. a telescopic scissor-like link mechanism that is provided between the base and the table and that guides the table in a vertically movable manner while maintaining a parallel relationship with the base; An actuating device attached to the scissor-like link mechanism to extend and retract the scissor-like link mechanism; and a spring device attached to the scissor-like link mechanism and acting in a direction to reduce the weight of the scissor-like link mechanism on the actuating device, A spring device is arranged between the links that constitute the scissor-like link mechanism of the other stages.

[Example] Next, the present invention will be described along with examples of the present invention shown in the accompanying drawings.

FIG. 1 and FIG. 2 show an embodiment of the elevator driving device for low-rise residential buildings according to the present invention. In these figures, the elevator drive for low-rise residential buildings includes a base 1 that is installed on the foundation of a building (not shown). A table 2 movable with respect to the base 1 is provided above the base 1, and an elevator car (not shown) is attached to the table 2. The elevator drive device for low-rise residential buildings further includes an extendable scissor-like device installed between the base 1 and the table 2 to guide the table 2 in a vertically movable manner while maintaining a parallel relationship with the base 1. A link mechanism 3 is provided.

Both the base 1 and the table 2 are approximately rectangular frameworks made of welded angle materials. The scissor-like link mechanism 3 is a so-called pantograph type link in which a pair of links 4 and 5 are combined in an X-shape and the intersections are pivotally connected by a pin 6, and two are arranged in parallel to form a double X-shape. This mechanism itself may be a well-known mechanism. The X-shaped scissor-like link is made up of multiple stages, and in the illustrated embodiment, the scissor-like link has four stages.
It is used in stages. The lower end of one link 4a of the lowest scissor-like link 3a among the four stages is pivotally connected to the base 1 by a pin 7, and the lower end of the opposite link 4a' is moved over the base 1 via a roller 8. It is made to be able to roll. Second stage scissor-like link mechanism 3b
consists of one link 4b and the other opposing link 4b' pivotally attached to the tip of the scissor-like link mechanism 3a at the lowest stage; similarly, the scissor-like link mechanism 3d at the third stage Link 4 of the scissor-like link mechanism 3b of
It consists of one link 4c pivotally attached to the tip of b, and the other opposing link 4c. The upper end of one link 4d of the uppermost scissor-like link mechanism 3d is pivotally connected to the table 2 by a pin 9, and the upper end of the other link 4d' is connected to the table 2 via a roller 10.
It is designed to move horizontally on the back side.

The elevator drive device for low-rise residential buildings is further provided with an actuating device 12 attached to the scissor-shaped link mechanism 3 to extend and retract the scissor-shaped link mechanism 3.
Although the actuating device 12 is a hydraulic cylinder in the illustrated embodiment, it may also be a screw cylinder that is rotated by an electric motor and has a ball screw that moves axially into and out of the cylinder. The cylinder end of the hydraulic cylinder or actuator 12 is pivotally connected to the link by a pin 23 at a position slightly lower than the central pivot pin of the lowest scissor link.
The plunger end of the hydraulic cylinder is pivoted by a pin 24 near the lower end of the second stage scissor link. In the illustrated embodiment, such a hydraulic cylinder 12 is also provided between the third-stage scissor-like link and the top-stage scissor-like link.

According to the invention, the low-rise residential elevator drive device comprises a spring device 15 attached to the scissor-like linkage 3 and acting in the direction of reducing the weight of the scissor-like linkage 3 on the actuating device 12. .
These spring devices 15 are provided between links constituting adjacent scissor-like link mechanisms of other stages.
This is because by making the spring longer and increasing the number of coils wound around it, the spring can be used within a certain range of elasticity. The spring 15a is connected between the link 4a' of the first-stage scissor-like link mechanism 3a and the opposing link 4b of the second-stage scissor-like link mechanism 3b; 4b and the opposing link 4c' of the third-stage scissor-like link mechanism 3c, and the spring 15c is provided between the third-stage link 4c' and the fourth-stage opposing link 4d'. . In the illustrated embodiment, the spring device 15
are tension springs which act to bring the connected links closer to each other, so that the scissor linkage 3 is always biased by the spring arrangement 15 towards the raised position. The strength of the spring device 15 is such that it can support the weight of the scissor-shaped link mechanism 3 and the weight of the table 2. With an elevator car (not shown) attached to the table 2, it is desirable that the sprung weight is offset by the spring force of the spring device 15.

By using such a spring device 15, the force acting on the output part of the actuating device 12 can be eliminated, or at least reduced, both when the elevator is raised and when it is lowered. Therefore, the work that the actuating device 12 has to do is extremely small, which is to raise and lower only the passenger load excluding the weight of the elevator drive and the elevator car. Therefore, a household 100V power supply can be used as a power source for the actuating device, and optimal speed can be obtained with a small output drive unit powered by a household power supply. In addition, each spring 15 of the spring device 15
Since a, 15b, and 15c are connected to opposing links of the adjacent scissor-like link mechanism of another stage, the spring can be made longer and the number of coils wound around it can be increased, so the spring can be made to have a constant elasticity. It can be used within a range and can prevent sudden movements of the scissor-like linkage. Therefore, the movement of the table, ie, the movement of the elevator car, is also smooth.

FIGS. 3 and 4 show an elevator drive system for low-rise residential buildings according to another embodiment of the present invention. In this example, the scissor-like link 21 of the scissor-like link mechanism 20 has three stages, and the actuating device 22 is a single screw cylinder 23 instead of a hydraulic cylinder. Also,
The spring device, as best shown in FIG.
There are spring devices 24, 24 arranged parallel to the screw cylinder 23 on both sides of the screw cylinder 23, and each spring device is connected to the link 21a' of the first stage scissor-like link mechanism and the third stage scissor-like link mechanism. It extends long and is connected to the link 21c' of the link mechanism. Therefore, since a long spring with a large number of wound coils can be used as the spring of the spring device, its action becomes smooth, and the same actions and effects as the devices shown in FIGS. 1 and 2 can be obtained.

The screw cylinder 23 is provided within the cylinder so that a ball nut can be rotated, and a lead screw threadedly engaged with the ball nut moves in and out of the cylinder according to the rotation of the ball nut, and may be of any known type. . Spring device 24
A compression spring is housed in two cylindrical bodies that can be expanded and contracted in a telescopic manner.

In this embodiment as well, the strength of the spring device 24 is such that it can support the weight of the scissor-shaped link mechanism 3 and the weight of the table 2. With an elevator car (not shown) attached to the table 2, it is desirable to have the sprung weight offset by the spring force of the spring arrangement 24.

Since such a spring device 24 is used, the same effect as the embodiment shown in FIGS. 1 and 2 can be obtained,
Therefore, the work that the actuating device 22 has to do is extremely small, which is to raise and lower only the passenger load excluding the weight of the elevator drive and the elevator car. For this reason, actuating device 2
A household 100V power supply can be used as the second power supply, and the optimum speed can be obtained with a small output drive unit powered by a household power supply. In addition, since the springs of the spring device are arranged between the links that constitute the scissor-like link mechanism of each stage, it is possible to make the springs longer, increase the number of coils wound around the spring, and utilize the elasticity of the spring within a certain range. This allows the elevator to move smoothly.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an elevator drive device for a low-rise residential building according to the present invention, FIG. 2 is a side view of the elevator driving device for a low-rise residential building shown in FIG. 1, and FIG. FIG. 4 is a side view of the elevator drive device for low-rise residential buildings shown in FIG. 3. DESCRIPTION OF SYMBOLS 1... Base, 2... Table, 3... Scissor-shaped link mechanism, 12, 22... Actuation device, 15, 24...
... Spring device, 12 ... Hydraulic cylinder, 22 ...
Screw cylinder.

Claims (1)

[Claims] 1 A base, a table movable vertically with respect to the base, and a table provided between the table and the base so that the table can be moved up and down while maintaining a parallel relationship with the base. a plurality of extensible and retractable scissor-shaped link mechanisms for guiding; an actuating device attached to these scissor-shaped link mechanisms to extend and retract these scissor-shaped link mechanisms; In a low-rise residential elevator drive device comprising a spring device that acts in a direction to reduce the weight of the scissor-like link mechanism applied to the device, the spring of the spring device is connected between the links constituting the scissor-like link mechanism of the other stage. An elevator drive device for low-rise residential buildings, characterized in that it is installed in.