JPS61229791A - Automatic door device for man conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of Kinmei] The present invention relates to an automatic transfer device installed at the entrance and exit of a passenger conveyor such as an escalator.

[Background of the invention]

Escalators installed on some outdoor public roads and moving walkways installed as a means of communication with the subway are often used as stairs or passageways during nighttime operations and are prone to mischief and foreign objects. In some cases, equipment malfunctions or injuries occur due to users falling. For this reason, in order to prevent escalators and moving walkways from being used as passageways when they are not in operation, it is being considered to provide automatic doors at the entrances and exits of passenger conveyors.

The problem in this case is that the user #Jb 5 is often operated remotely, and as shown in Figs. frame body 2
Alternatively, there is a risk of the body 4 being pinched between 1 and 30. Especially young children are likely to be interested in the operation of automatic doors, so if their hands or feet are pinched, it can cause serious injury, which is a problem. (Japanese Unexamined Patent Publication No. 48-2580).

[Purpose of the invention]

The present invention was made in view of this point, and its purpose is to provide a safe automatic door for a passenger conveyor with a simple mechanism.

[Summary of the invention]

A feature of the present invention is that a torque limiting device is provided in the drive system of the automatic door, and when a load torque exceeding a certain torque occurs,
The problem is that the torque limiting device is configured to cause slippage and stop the door from opening and closing.

Torque limiting devices utilize a friction mechanism that slides when a force is applied that prevents the door from opening or closing.

[Embodiments of the invention]

Next, a first embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the drive section of the automatic door of the present invention. In FIG. 1, 21 is the drive motor, 22 is its pinion, and 23 is the drive motor.
24 represents a first gear, 24 represents a second pinion, 25 represents an idle gear, and 26 represents a second gear, which are configured to mesh with each other to transmit rotation. Reference numeral 27 denotes a spring which connects the second gear to the friction plate 3 via a spring seat 29 with a nut 28.
7 and 31, which are designed to press the
The pinion 31 is configured to transmit torque only by the frictional force of the friction plate 30. 32 is a final gear which meshes with the third gear 31, and the torque transmitted thereto is configured to be transmitted to the door 1 of the automatic door via the output shaft 33. 34 supports these drives in pace.

In such a configuration, the torque of the drive motor 21 is transmitted to the second gear 26 via the pinion 22, the first gear 23, the second pinion 24, and the idle gear 25. Here, the torque to the third pinion is transmitted via the friction plate 30, and this friction torque can be adjusted by the amount of compression of the spring 27 by rotating the nut 28. Therefore, if the load torque of the door 1 increases beyond a certain value, slippage will occur between the friction plate 30 and the second gear, and no more torque will be applied to #iil. This allows the human body to adjust the set value of friction torque as shown in Figures 2 and 3.
By making the door sized so that it will not cause injury even if it gets caught in the parts shown in the figure, it becomes possible to realize a safe automatic door. In addition, since the present invention sets the slip limit based on the drive torque, it is possible to detect abnormal torque whether the door is open or closed69, making it possible to protect against movement in both directions with a single device. There are advantages that can be achieved.

Furthermore, in the present invention, by adjusting the amount of compression of the spring 27, it is possible to always set an appropriate sliding torque even if the friction torque changes, and the condition of the friction plate changes, making it safer. We can provide automatic doors with high performance.

In the first embodiment (FIG. 1) described above, the torque limiting device utilizes the friction caused by the surface contact between the second gear 26 and the friction plate 30 to cause it to slip when a load of more than a predetermined value is applied. In addition to surface contact between plates, it is also possible to utilize friction due to line contact between peripheral surfaces of rollers. An example of this case is shown in FIGS. 2 and 3, which are on the left of the second embodiment.

In FIGS. 2 and 3, the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

The difference from the embodiment shown in FIG. 1 is that a large-diameter friction roller 40 is attached to the output shaft 33, and a small-diameter friction roller 41 in contact with the outer circumferential surface of the output shaft 33 is supported by a bracket 42 that is supported at one end along with a gear 25. In addition, the other end of the bracket 4 is slidably fixed to the rod 43, and a spring 4 wound around the rod 43 is installed between the other end of the bracket 4 and the nut 44.
5 is at the main point.

According to such a configuration, the rotational force of the motor 21 is transmitted to the lX2 gear 26 as in the first embodiment, and at this time, the small-diameter friction roller 4 coaxially supported by the second gear 26 is transmitted.
1 and the large-diameter friction roller 40 can drive nl to open and close.

Now, if a force acts on the door 1 to prevent its opening/closing operation, the circumferential surfaces of both friction rows 240, 41 will slip against each other, and the door 1 will no longer be able to move.

〔Effect of the invention〕

In the present invention, even if an automatic door is operated by remote control and an infant or the like gets caught in the door, it can be prevented from being caught with a force exceeding a safe constant torque, so the mechanism is simple. can further improve safety.

Next, according to the present invention, it is possible to provide an automatic door for a passenger conveyor with extremely high safety.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the first embodiment of the present invention, Fig. 2 is a block diagram showing the second embodiment, Fig. 3 is a sectional view taken from the entrance to the entrance of Fig. FIG. 5 is a side view of the conveyor entrance, FIG. 5 is a plan view thereof, and FIG. 6 is an explanatory diagram showing the state where the conveyor is sandwiched between the door and the handle. 21... Drive motor, 22... Pinion, 23...
・ml gear, 24...2nd binion, 26...2nd
Gear, 27...Spring, 28...Nut, 29...
Spring seat, 30...Friction plate, 31...Third pinion,
32... Final gear, 33... Output shaft, 40... Large diameter friction roller, 41... Small diameter friction roller, 42...
Bracket, 43...Rod, 44...Nut, 4
5...Spring.

Claims (1)

[Claims] 1. In an automatic door provided at the entrance of a passenger conveyor, the automatic door opening/closing drive device and the door may be slid when a force that prevents movement of the door in the opening/closing direction is applied. An automatic door device for a passenger conveyor, characterized in that the door device is connected via a torque limiting device consisting of a friction mechanism. 2. In the device according to claim 1, the torque limiting device includes two friction plates facing each other and in surface contact with each other;
An automatic door device for a passenger conveyor, comprising an elastic body that presses one of the friction plates in a surface direction thereof. 3. In the device according to claim 1, the torque limiting device includes two friction rollers that face each other and whose peripheral surfaces are in line contact, and an elastic roller that presses one of the friction plates in the opposite direction. An automatic door device for a passenger conveyor characterized by comprising a body and a body.