JPH027160Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides automatic opening and closing doors of elevators, etc.
This invention relates to a safety device that prevents passengers' hands from getting caught between the door and the doorway frame when the door is opened.

Various safety devices of this type have been devised in the past, but they include a detection device installed in the doorway frame, and detect when a passenger's hand or the like is caught between the door and the doorway frame.
They detect only the pressing force in the door opening/closing direction, or only the pressing force in a direction perpendicular to the door opening/closing direction.

A conventional safety device will be explained with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing the vicinity of the entrance and exit of the elevator car, where 1 is the car floor, 2 is the car side plate,
3 is an entrance frame, and 4 is a car door, which opens in the direction of arrow A. FIG. 2 is an enlarged view of part B in FIG. 1. 5
is a response body having a length spanning almost the entire height of the doorway frame 3, and having a threaded bar 6 (not shown) fixed to the back surface. This bar 6 is the entrance frame 3
It is inserted into a hole (not shown) provided in an L-shaped bracket 7 fixed to the bracket. 8 is response body 5
9 is a nut that adjusts the forward position of the response body 5, and 10 is a switch attached to a bracket 11 fixed to the doorway frame 3.

When the passenger's hand 12 is caught in the gap between the door frame 3 and the door 4 while the door 4 is opening, the response body 5 is pushed in the direction C against the spring 8, and the switch 10 is activated by the bar 6. The door control device (not shown) stops the door opening operation and causes the door closing operation to be performed.

However, the above device only detects the pressing force in the direction C in FIG. 2, and cannot detect the applied pressing force in the direction D in the figure. Also, the front surface 5a of the response body 5 is connected to the door 4 of the entrance/exit frame 3.
Even when the passenger's hand 12 is set at almost the same position as the surface 3a that opposes the surface 3a, the thick instep part of the passenger's hand 12
Since the fingertip is caught in the gap between the fingertip and the door 4 and receives strong pressure, it is difficult to apply pressure in the C direction to the responsive body 5 at the relatively thin fingertip portion, which makes detection difficult. It was hot.

The present invention has been developed in view of the above points, and is intended to reliably detect when a passenger's hand or the like is caught between the door and the doorway frame.

An embodiment of the present invention will be explained with reference to FIG. 2
0 is a cylinder whose top and bottom are rotatably attached to a bar 22 by a shaft 21, the bar 22 is threaded (not shown), and is attached to a U-shaped bracket 23 fixed to the doorway frame 3. It is inserted through two holes (not shown). 24 is cylinder 2
A nut for adjusting the forward position of 0, 25 is a spring 26
27 is a washer, 28 is a bracket fixed to the doorway frame 3, and the switch 10 is fixed through an elongated hole (not shown). Further, the detection mechanism shown in FIG. 3 is provided at the upper and lower ends of the cylinder 20. Note that the same reference numerals as in FIG. 2 indicate the same parts.

According to this embodiment, when a pressing force is applied from the direction D by the passenger's hand, etc., the cylinder 20 rotates in the E direction, and as a result, the hand, etc. that is caught in the gap is forced to move between the cylinder 20 and the door 4. It will be sent to the narrow part of the gap. Therefore, the pressing force applied to the cylinder 20 in the C direction increases, the cylinder 20 moves in the C direction, and the switch 10 is activated.

Therefore, according to the device of this embodiment, no matter which direction a pressing force is applied to the cylinder 20, the rotation of the cylinder 20 easily activates the switch 10 to stop the door opening operation and to start the door closing operation. I can make you do it.

Next, another embodiment of the present invention will be described with reference to FIG. The cylinder 20 is rotatably attached at the top and bottom to a bracket 32 fixed to an L-shaped bracket 31 fixed to the entrance/exit frame 3 by a shaft 21. A wire rope 33 has one end fixed to the surface of the cylinder 20 and the other end fixed to one end of the bar 35 via a hole (not shown) provided in the doorway frame 3 and a roller 34. The bar 35 is threaded (not shown) and inserted into a hole (not shown) provided in a bracket 36 fixed to the doorway frame 3. 37 is wire rope 3
3 is a nut for adjusting the tension of the spring 39, 40 is a washer, and the switch 10 is fixed to the doorway frame 3 through an elongated hole (not shown). Note that the same reference numerals as in FIG. 3 indicate the same parts.

In the embodiment shown in FIG. 4, the shaft 21 of the cylinder 20 is fixed, but when the cylinder 20 is rotated by a passenger's hand or the like, the wire rope 33 is moved through the wire rope 33 wound around the cylinder 20 and the bar 35. The washer 40 moves downward in FIG. 4, and the switch 10 is actuated.

In addition to the above embodiments, the device for detecting the rotation of the cylinder 20 may use a belt or chain, or a cam or crank mechanism.

It goes without saying that the devices shown in FIGS. 3 and 4 may be combined.

As explained above, according to the present invention, by using a cylindrical rotatable response body,
To reliably detect a passenger's hand or the like caught in the gap between the doorway frame and the door.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing the vicinity of the entrance and exit of a conventional elevator car, Figure 2 is an enlarged view of part B in Figure 1, and Figure 3 is an enlarged view of part B in Figure 1.
The figure shows one embodiment of the present invention, and FIG. 4 shows another embodiment of the present invention. 2... Car side plate, 3... Entrance/exit frame, 4... Car door, 5... Response body, 6, 22, 35... Ba,
8, 26, 39... Spring, 9, 24, 25, 3
7,38...Natsuto, 10...Switch, 20...
...Cylinder, 21...Shaft, 27, 40...Washer, 33
...wire rope, 34...roller.

Claims (1)

[Scope of utility model registration request] In a device that is equipped with a door that electrically opens and closes the entrance and detects when an object enters the gap between the door and the door frame that forms the entrance, there is a door perpendicular to the opening and closing direction of the door on the door bag side of the entrance frame. A cylinder provided so as to be movable in the front-back direction; a device that normally biases the cylinder in a direction approaching the door and rotatably holds the cylinder in a position that maintains a slight gap from the door; A door safety device comprising a device that is activated when the door is displaced in a direction away from the door.