JPH0518462Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention relates to an elevator hall door device.
In particular, it relates to a landing door closing device.

[Technical background of the invention]

Generally, the door opening/closing device on the landing side of an elevator is designed to open only the landing door on the floor where the car is stopped, and the landing door on the other floors only opens.
Laws stipulate that doors must be mechanically locked to prevent them from being opened from the outside.

On the other hand, the landing door (door panel) of the door opening/closing device on the landing side is engaged with and integrated with the opening/closing door of the passenger car, and is opened and closed by a door driving device installed on the passenger car side, Due to this, the car may be raised or lowered with the landing door left open. In this case, if the landing door is left open, there is a risk of falling into the hoistway. Therefore, in order to prevent this, the landing door is configured to close by itself when the driving force for opening the door is removed.

The door opening/closing device on the landing side of this type of elevator that has already been proposed is configured to lock the door panel using a link mechanism and the elasticity of a spring.

That is, the door opening/closing device on the landing side shown in FIGS. 1 and 2 is applied to a single-opening two-panel door, and a relatively wide frame-shaped frame is installed on the landing side of each floor. 1 is set upright facing a hoistway (not shown), and a pair of guide rails 2 are installed on the top of this machine frame 1.
erect the machine frame 1 directly below both guide rails 2.
A pair of thresholds 3 are installed in parallel, and both guide rails 2 are installed in parallel.
A high-speed door panel 4 and a low-speed door panel 5, each of which opens two doors on one side, are installed on both the thresholds 3 so as to be movable by means of rollers 6 and guide shoes 7 attached thereto. A bracket 8 is attached to the middle of the vertical frame 1a, and a link 9 is attached to this bracket 8 by a pin 10.
One end of the operating lever 11 is connected to the free end of this arm lever 9, and this link 11 is attached to the support portion 5a of the low-speed door panel 5 on the pin shaft 12.
The other end of this link 11 is connected by a pin 15 to the link 14 of a support shaft 13 (fulcrum) attached to the outside 4a of the high-speed door panel 4, and the link 9 and the bracket are A compressible coil spring 16 is suspended between the support portion 1b of the lower machine frame 1 and the coil spring 16, and the coil spring 16 is configured to give the door panels 4 and 5 a closing habit.

Therefore, the door opening/closing device on the landing side of the elevator described above engages with the locking piece on the car side,
Once temporarily integrated, the high-speed door panel 4 is synchronously moved by the door driving device on the side of the car.
The low-speed door panel 5 is opened against the elastic force of the coil spring 16.

Further, when the opening/closing door of the car is closed by the door driving device, the high and low speed door panels 4 and 5 are also closed together by the elasticity of the coil spring 16 in synchronization with this.

On the other hand, even if the door opening/closing device on the landing side is left open for some reason, the high/low speed door panels 4 and 5 are equipped with coils to prevent passengers from falling into the hoistway. The door is closed by the stored elasticity of the spring 16.

Next, a series of power relationships will be explained.

F = F _s + F _w - F _r F _w = 1/8 tan θ (W ₁ - W ₂ ) where F: horizontal closing force applied to the door panel 4 F _s : generated by the tension spring 16 and applied to the door panel 4 Horizontal closing force _Fw : Horizontal closing force applied to the door panel 4 caused by the weight of the links 9, 14 of the closing device _Fr : Travel of the door panels 4, 5 and the links 9, 1
Resistance force such as rotation of 1, 14 W ₁ , W ₂ : Dead weight θ of links 9, 14 : Bending angle of links 9, 11, 14 Horizontal closing force F applied to door panel 4 is closing force due to output of tension spring 16 F _s and link 9,14
It is determined by the above formula using the dead weights W ₁ and W ₂ of .

[Problems with background technology]

However, in the above-mentioned elevator hall door closing device, the links 9 and 14 are generally made of the same material and have almost the same shape, so the link dead weights W ₁ and W ₂ are almost equal, and the closing force generated by the link dead weight is F _w ≒0. Therefore, only the panel output generates the closing force F against the running resistance F _r , and for this reason, the tension spring 1
6 necessarily needed something large. Furthermore, as the entrance/exit width becomes wider and the width of the door panels 4, 5 also increases, the running resistance F _r tends to increase. Not only did the spring force have to be increased, but the link mechanism itself had to be strengthened to withstand it.

[Purpose of invention]

The present invention generates a closing force by adding a weight difference to the links that constitute the landing door opening/closing device, thereby downsizing the tension spring and the door opening/closing device as a whole, and providing a thin landing door device. With the goal.

[Summary of the idea]

In a landing door device that has a landing opening/closing device using a tension spring and a link, the present invention aims to move the link located below the straight line connecting the door panel side fulcrum of the link and the machine frame side fulcrum to the upper side. It is constructed to be lighter than some other links, to effectively utilize the closing force generated by the difference in weight between the upper link and the lower link, and to reduce the size of the tension spring and the weight of the landing opening/closing device.

[Example of idea]

Hereinafter, an embodiment will be described in which the present invention is applied to a two-panel door opening/closing device.

Note that the same reference numerals are given to the same components as those in the specific example described above.

1, 2, and 3, reference numeral 1 is a frame-shaped machine frame provided on the landing side of each floor of the building, and one side (back side) of this machine frame 1 is
It is located on the hoistway side. Additionally, a pair of guide rails 2 are installed on the top of the machine frame 1.
A pair of thresholds 3 are arranged in parallel at the lower part of the machine frame 1 directly below both guide rails 2. Furthermore, a high-speed door panel 4 and a low-speed door panel 5, each of which opens two doors on one side, are provided on both the guide rails 2 and both the thresholds 3 so as to be movable by means of rollers 6 and guide shoes 7 attached thereto. ing.

On the other hand, a bracket 8 is attached to the middle of the vertical frame 1a formed by the back angle of the machine frame 1, and this bracket 8 has a link 9 connected to a pin 10.
It is pivoted by. Further, one end of a link 11 is connected to the free end of the link 9, and this link is pivotally supported by a pin shaft 12 on the support portion 5a of the low-speed door panel 5. moreover,
The other end of the link 11 is connected to a pin 1 on an operating arm lever 14 of a support shaft 13 attached to the high-speed door panel 4.
5.

On the other hand, a tension spring 16 is hung between the link 9 and the lower bracket 1b of the bracket 8, and this tension spring 16 is connected to the high-speed door panel 4 and the low-speed door panel 5 through the links 9, 11, and 14. It gives a closed door habit. Further, the link 9 is made of flat steel, and the link 14 is made of a thin plate having sufficient strength and pressed into a shape or a square shape. Therefore, a difference in dead weight W ₁ −W ₂ occurs between the link 9 and the link 14, and this difference in dead weight gives a closing force of F _w =W ₁ −W ₂ /8tanθ to the high-speed door panel 4, and the closing force between the high-speed door panel 4 and the low-speed door panel 4 is The door panel 5 is given a closing habit.

Therefore, according to the present invention, the closing force generated due to the difference in dead weight between link 9 and link 14, which form part of the link mechanism, can be used for the door closing habit, so that the tension required to generate the required closing force can be utilized. The output of the spring 16 can be reduced, and the tension spring 16 can be made smaller. Furthermore, since the output of the spring is small, the required strength of the link mechanism that transmits this output to the door panel can also be reduced. Furthermore, even if the running resistance F _r increases due to the widening of the entrance/exit width and the width of the door panel, the lengths of the links 9, 11, and 14 will increase accordingly, so the dead weight of the links 9 and 14 will increase. The difference W ₁ − W ₂ also increases,
Since a large closing force can be applied, the required output of the tension spring 16 hardly changes, and there is no need to use an unnecessarily large spring.
6 by standardization. In addition, in modern buildings equipped with air-conditioning equipment, the wind flowing through the hoistway and landing area causes a sudden increase in wind pressure at the closed end of the door, causing an increase in running resistance F _r . As is clear from the above calculation formula, the resulting closing force is determined by the bending angle θ of the link at the door closing end.
At around 30°, even if the bending angle θ becomes slightly smaller, tanθ decreases rapidly, so the closing force F _w =
W ₁ −W ₂ /8tanθ increases rapidly. Therefore, even if the running resistance F _r increases at the closed end of the door due to wind pressure, the closing force F does not change much as shown in FIG. 4, and the required force can be obtained. Therefore, even if the landing door opening/closing device according to the present invention is left closed for some reason, the door is always closed, and falling into the hoistway can be prevented.

Next, another embodiment of the present invention shown in FIG. 5, in addition to reducing weight by providing a hole in the link 14,
By providing a plurality of holes 17 in the portion of the intermediate link 11 located below the pin 12, it is lighter than the portion located above the pin 12.
The resulting weight is also effectively utilized as a closing force. In addition, as an application example, the link 14 is made of light metal, the link 9 is made of flat steel,
Here, we will list the weight difference (not shown) based on the difference in specific gravity due to the difference in material.

Although this embodiment has been described with respect to a two-panel door that opens on one side, the present invention can be similarly applied to a door device with a four-panel door that opens on both sides and a three-panel door that opens on one side.

[Effect of idea]

As described above, according to the present invention, by effectively utilizing the closing force generated by the difference in weight of the links, it is possible to not only downsize the tension spring and the door opening/closing device, but also create a safe landing door with reliable closing behavior. equipment can be provided.

[Brief explanation of the drawing]

Fig. 1 is a rear view of a conventional elevator landing door opening/closing device, Fig. 2 is a cross-sectional view of the same as above, Fig. 3 is a rear view of an elevator door opening/closing device according to the present invention, and Fig. 4 is a diagram of door opening/closing operation characteristics. , FIG. 5 is a diagram showing another embodiment of the present invention. 1...Machine frame, 1a...Vertical frame, 2...Guide rail, 3...Sill, 4...High speed door panel, 5...
...Low speed door panel, 9...Link, 11...Link, 14...Link, 16...Tension spring, 1
0, 12, 13...Pin axis (fulcrum).

Claims (1)

[Scope of utility model registration request] A guide rail is provided at the top of the frame-shaped machine frame, and a sill is provided at the bottom, and a door panel is attached to these via running wheels and guide shoes, and the fulcrum on the vertical frame of the machine frame and the fulcrum on the door panel are connected. In devices that are connected by a link and drive this link to open and close the elevator entrance/exit, the link above the straight line connecting these supporting points is made of a solid heavy metal plate. However, on the other hand,
The links below this straight line use thin plates,
A door device for an elevator landing, characterized in that the cross section is configured in a U-shape or an opening shape so that its weight is lighter than that of the upper link.