JPH0712904B2 - Automatic door device for man conveyor - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic door device provided at an entrance / exit of a man conveyor such as an escalator.

[Background of the Invention]

The escalator provided on part of the public road and the escalator provided as a means of connecting with the subway and the moving walkway are often used as stairs and passages during nighttime suspension of operations, and due to mischief and foreign objects, etc. There was a risk of equipment failure or injury due to the user falling. For this reason, it is considered to install an automatic door at the entrance / exit of the passenger conveyor in order to prevent it from being used as a passage when the escalator or the moving sidewalk is not operating.

As a problem in this case, the automatic door 5 is often operated remotely, and as shown in FIG. 4, FIG. 5 and FIG. There is a risk that the body 4 will be caught between the body 2 or 1 and the door stop 3, and since infants are particularly interested in the operation of the automatic door, it will be a serious injury if their hands or feet are caught. Therefore, there was a problem (Japanese Patent Laid-Open No. 48-2580).

[Object of the Invention]

The present invention has been made in view of this point, and an object of the present invention is to provide an automatic door for a passenger conveyor which has a simple mechanism and is excellent in maintenance and safe.

[Outline of Invention]

The feature of the present invention is that it is provided at the entrance / exit of the passenger conveyor, and is housed in one of the frame bodies provided on both sides of the entrance / exit during normal operation of the passenger conveyor, and is rotated on the opposite side when operation is stopped. In a pivoting single-opening automatic door that abuts on a door stop of a frame to close the entrance / exit, a force that prevents the opening / closing drive device of the automatic door and the door from moving in the opening / closing direction is used. The torque limiting device is connected via a torque limiting device made of a friction mechanism that slides when actuated, and the torque limiting device is provided in the opening / closing drive device and a friction member provided separately from the door on the pivot shaft of the door. The friction member is brought into contact with an elastic body so that the pressing force can be adjusted, and the opening and closing of the door is performed by remote control.

According to the above configuration, when a load torque equal to or higher than a certain torque is generated, such as when a force that interferes with the opening / closing operation of the door acts,
The torque limiting device causes a sliding action to stop the opening and closing of the door, resulting in high safety. Further, since the friction member is separate from the door exposed to the outside, a predetermined friction force can be maintained even if the door itself is deformed, and the member itself is replaced without being damaged by friction. Because it is only, maintenance is very easy.

Example of Invention

Next, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a drive unit of the automatic door of the present invention. In FIG. 1, 21 is a drive motor, 22 is its pinion, and 23 is the first.
Gear, 24 is the second pinion, 25 is the idle gear, 26
Indicates a second gear, which is configured to mesh with each other to transmit rotation. Reference numeral 27 is a spring, and the nut 28 presses the second gear against the friction plate 30 via the spring seat 29. A third pinion 31 is integrally formed with the friction plate 30, and the second gear 26 and the third pinion 31 are configured to transmit torque only by the frictional force of the friction plate 30. A final gear 32 meshes with the third pinion 31, and the torque transmitted here is configured to be transmitted to the door 1 of the automatic door via the output shaft 33. The base 34 supports these drives at the base.

In such a configuration, the torque of the drive motor 21 is the pinion 22, the first gear 23, the second pinion 24, and the idle gear 25.
Is transmitted to the second gear 26 via. Here, the torque to the third pinion is transmitted through the friction plate 30, and this friction torque can be adjusted by the compression amount of the spring 27 by the rotation of the nut 28. Therefore, if the load torque of the door 1 exceeds a certain value, the friction plate 30 and the second
A slip occurs between the gears, and no more torque is applied to the door 1. As a result, a safe automatic door can be realized by setting the friction torque setting value to a size that will not cause an injury even if the human body is caught in a portion as shown in FIGS. 5 and 6. Becomes Further, in the present invention, since the slip limit is set by the drive torque,
Abnormal torque can be detected when the door is open or closed, and there is an advantage that a single device can realize protection against operations in both directions.

Furthermore, in the present invention, since the friction torque is variable by adjusting the compression amount of the spring 27, it is possible to always set an appropriate slip torque even when the state of the friction plate changes, and to improve safety. Can provide high automatic doors.

In the above-described first embodiment (FIG. 1), the torque limiting device uses the friction due to the surface contact between the second gear 26 and the friction plate 30 to slide when a load larger than a predetermined value is applied. In addition to the surface contact between the plates, it is also possible to use the friction due to the line contact between the peripheral surfaces of the rollers. An example in that case is shown in FIGS. 2 and 3 as a second embodiment.

2 and 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. The difference from the embodiment of FIG. 1 is that a large diameter friction roller 40 is attached to the output shaft 33, and a small diameter friction roller 41 contacting the outer peripheral surface of the output shaft 33 is pivotally supported on a bracket 42 whose one end is pivotally supported together with a gear 25. Then
Further, the other end of the bracket 4 is slidably fixed to the rod 43, and a spring 45 wound around the rod 43 is provided between the other end of the bracket 4 and the nut 44.

According to such a configuration, the rotational force of the motor 21 is transmitted to the second gear 26 as in the first embodiment, and at this time, the second gear 26 is transmitted.
The door 1 can be opened and closed by the frictional force between the small-diameter friction roller 41 and the large-diameter friction roller 40 that are coaxially supported by the shaft 26. If a force is applied to the door 1 that hinders its opening / closing operation, the circumferential surfaces of the friction rollers 40 and 41 slip, and the door 1 cannot move any further.

[Advantages of the Invention] In the present invention, even if an infant or the like is caught in the door while operating the automatic door by remote control, it is possible to prevent the child from being caught with a force equal to or higher than a safe constant torque. With a simple mechanism, it is possible to improve safety and improve maintenance.

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

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is a block diagram showing a second embodiment, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. FIG. 5 is a side view of the conveyor entrance / exit, FIG. 5 is a plan view of the same, and FIG. 21 ... Drive motor, 22 ... Pinion, 23 ... First gear, 24 ... Second pinion, 26 ... Second 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, 45 ...
Spring.

Claims (3)

[Claims] 1. A frame provided at an entrance / exit of a passenger conveyor, housed in one of the frames provided on both sides of the entrance / exit during normal operation of the passenger conveyor, and pivoted on the opposite side when operation is stopped. In a rotary single-opening automatic door that abuts on a door stop of a body and closes the entrance / exit, a force that prevents the opening / closing drive device of the automatic door and the door from moving in the opening / closing direction acts. The torque limiting device is connected via a torque limiting device formed of a friction mechanism that slides, and the torque limiting device is provided on the opening / closing drive device and a friction member provided separately from the door on the pivot shaft of the door. The friction member is brought into contact with the elastic member so that the pressing force can be adjusted,
An automatic door device for a passenger conveyor, wherein opening and closing of the door is performed by remote control. 2. The apparatus according to claim 1, wherein the friction member of the torque limiting device is composed of two friction plates facing each other and in surface contact with each other, and the elastic body is the friction plate. An automatic door device for a man conveyor that presses one of the two in the direction of its surface. 3. The device according to claim 1, wherein the friction member of the torque limiting device is composed of two friction rollers whose peripheral surfaces are in line contact with each other, and the elastic body comprises Automatic door device for passenger conveyor that presses one of the friction plates in the opposite direction.