JP2883311B2 - Automatic closing door braking method and automatic closing door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door for an emergency evacuation route in a tunnel, particularly a place where power cannot be supplied, a place where power may be cut off due to an accident or the like, or a power supply which is newly remodeled. The present invention relates to an automatic closing door and a method of braking the automatic closing door, which are suitable for attaching to a place where it is difficult to pull the door.

[0002]

2. Description of the Related Art Conventionally, an automatic door has been opened by detecting a person for entering and exiting with a photoelectric switch or other detection switch.
Most automatically close after a certain period of time. An electric motor or air pressure is used to open and close the door, but a motor requires a power supply as a matter of course, and an air pressure requires a power supply because an electromagnetic valve is used. Further, since an electric circuit is used as a control circuit in each case, a power supply is indispensable.

[0003] Some doors are opened manually by hand, but only closed automatically. Such an automatic closing door accumulates a spring at the time of opening and performs closing by the accumulated spring force, but requires a force due to a large spring force at the time of opening, and opens the door. If you let go of the hand, the door closes rapidly, so for continuous people to pass, you must always hold the door with your hand or open it one after another. It is difficult to pass and may be dangerous.

In recent years, it has become essential to provide an evacuation passage in a tunnel for evacuation in the event of an accident such as a fire. To prevent smoke and gas from entering the evacuation passage, doors are provided at the entrance and exit of the evacuation passage, and in the event of an accident, after a person evacuates from the tunnel to the evacuation passage, the evacuation passage entrance door is closed. It must be. In the event of an accident, a power failure may occur, so the door at the entrance cannot be set to the automatic door described above. Since the self-closing door using the spring force also has the above-described characteristics, a closing operation is always performed for a person who tries to pass through one after another, causing confusion.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can perform a braking action only at an early stage of a closing operation, so that an automatic closing that does not immediately close an opened door is performed. It is an object of the present invention to provide a method for braking a door and a self-closing door.

[0006]

According to a first aspect of the present invention, there is provided a method of braking an automatic closing door, wherein the rotation of a rotating shaft interlocking with the opening and closing of a door is transmitted to a braking means to perform braking. When the rotating shaft starts returning rotation by the closing operation, the rotation of the rotating shaft is transmitted to the braking means only during the return rotation of the rotating shaft at a predetermined angle in the initial stage of the returning rotation, and the rotating shaft is rotated. The invention according to claim 2 is characterized in that, in the automatic closing door, the rotation of the rotating shaft interlocking with the opening and closing of the door is transmitted to the braking means via the toothless gear, When the rotating shaft starts returning rotation due to the closing operation of the door, the rotating shaft only engages with the toothless gear at the initial stage of the returning rotation until the rotating shaft returns to a predetermined angle and rotates. The rotation of the The rotating shaft is transmitted to the motion means is characterized in being braked.

[0007]

1 to 3 are diagrams for explaining an example of an embodiment of the present invention. FIG. 1 is a mechanical diagram on a braking side, FIG. 2 is a mechanical diagram on a driving side, FIG. 3 is an overall explanatory diagram.

Referring to FIG. In the figure, 1 is a door at a closed position, 2 is a door moved to an open position, 3 is a roller chain, 4 is a driving sprocket, 5 is a braking sprocket, 30 is a suspension rail, and 31 is a suspension roller. The door is
The roller chain 3 is suspended on the suspension rail 30 by the suspension roller 31 and moves while being guided by the suspension rail.
Attached to. By opening the door 1 by hand, the door 1
The roller chain 3 is driven with the movement of. As a result, the driving sprocket is rotated, and the rotational force is stored in a spring (not shown). The load connected to the braking sprocket 5 does not become a rotational load when the door is opened because the load is connected to the braking sprocket 5 through a one-way clutch as described later.
The door 1 moves from the closed position to the open position, and becomes the position of the door 2. When the hand is released at this position, the drive side sprocket 4 is rotationally driven by the force of the stored spring, and the door 2 moves in the closing direction by the roller chain 3. At this time, the braking side sprocket 5 is also rotated. At this time, the one-way clutch is engaged, so that the door is very slowly driven in the closing direction by the braking action, as will be described later. To release the braking mechanism and perform a closing motion at a constant speed to complete the closing.

The driving side will be described with reference to FIG. FIG. 2 is a plan view of a main part of the drive mechanism. In the figure, reference numeral 6 denotes a drive shaft interlocked with the sprocket 4 in FIG. 10b and 10c are fixed members of a constant load spring.

The fixing members 10a, 10b, 10c are screwed to the flat portions 11a, 11b, 11c of the winding drum, and hold the other ends of the constant load springs 7a, 7b, 7c.
The fixed shafts 8a, 8b, 8c of the constant load springs are fixed to a frame (not shown).

Therefore, when the door 1 is opened, the drive shaft 6 linked to the drive sprocket 4 in FIG. 3 is rotated in the direction of the arrow, and the constant load springs 7a, 7b, 7c are wound around the winding drum 9 to accumulate energy. . When the hand is released from the door, the winding drum 9 is driven by the constant load springs 7a, 7b, 7c in the direction opposite to the arrow, and the driving sprocket 4 in FIG. Move to the side and close.

The braking side will be described with reference to FIG. FIG. 1 is a plan view of a main part of the braking mechanism. In the drawing, reference numeral 12 denotes an interlocking shaft that interlocks with the braking sprocket 5 in FIG.
2, 14 is a toothless gear, 15 is a braking gear, 16 is a rotating shaft interlocked with a braking generator 17, 18 is a speed regulating gear, and 19 is a rotating shaft interlocked with a speed regulating generator 20. . Two pins 14a and 14b are implanted in the toothless gear 14, and fixed springs 22a and 22b that can be engaged with the pins 14a and 14b are fixed to a frame (not shown). A torque limit is interposed between the braking side sprocket 5 and the interlocking shaft 12. A one-way clutch is interposed between the braking gear 15 and the rotating shaft 16 and between the speed regulating gear 18 and the rotating shaft 19. The one-way clutch does not transmit the rotational force from the braking gear 15 to the rotating shaft 16 and from the speed regulating gear 18 to the rotating shaft 19 in the direction of the arrow that opens the door 1, and does not load the door opening. . In the rotation direction opposite to the arrow in which the door moves in the closing direction, the rotation of the braking gear 15 is transmitted to the rotation shaft 16 to rotate and drive the braking generator, and the rotation of the governing gear 18 is transmitted to the rotation shaft 19. And
The governor 20 is driven to rotate. Reference numeral 21 denotes a position regulating spring that regulates the position of the braking gear to a position where it can easily mesh with the toothless gear.

The operation on the braking side will be described. FIG. 1 (A)
It is a figure in the state where the door was closed. When the door is opened by hand, the gear 13 rotates in the direction of the arrow. Pin 14a is spring 22
Since the toothless gear 14 is pushed in the direction of the arrow by a, it meshes with the gear 13 and rotates in the direction of the arrow. Braking gear 1
5 is regulated by the spring 21 at a position where it can easily mesh with the toothless gear 14, so that when the toothless gear 14 rotates about 80 degrees, the braking gear 15 meshes with the toothless gear 14 and rotates, as described above. , Rotating shaft 1 for one-way clutch
6 is not rotated. Further, the gear 13 continues to mesh with the toothless gear 14, and the toothless gear 14 has about 2
When rotated by 10 degrees, the state shown in FIG. 1B is obtained, and thereafter, only the gear 13 rotates.

The rotation of the toothless gear at about 210 degrees is such that the gear ratio is set to be a sufficiently short distance (for example, a distance of about 1/20 to 1/50 of the full stroke) compared to the full travel of the door. Selected. Therefore, FIG.
The state of (B) is maintained.

When the hand is released from the opened door, the gear train starts to move from the state shown in FIG. That is,
As described above, since the roller chain 3 is moved and the braking-side sprocket 5 is driven, the gear 13 rotates in the direction of the arrow, and the toothless gear 14 meshing with the gear 13 rotates. The braking gear 15 meshing with the toothless gear 14 drives a braking generator 17 via a one-way clutch to perform dynamic braking. At the same time, the governing gear 18 meshing with the gear 13 drives the governing generator 20 via the one-way clutch. At this time, the braking generator operates and the rotation speed is low, so that the operation of the governing generator Can be ignored. For the braking by the braking generator 17, a gear increasing ratio (for example, 1: 150) of the braking generator is selected so as to remarkably reduce the closing speed in the initial stage of closing the door. The gear speed increase ratio of the governing generator 20 is about 10% thereof. As the rotation of the toothless gear 14 advances, the braking gear 15 is engaged with the toothless part, and the braking action ends. In the above example, the engagement between the toothless gear 14 and the braking gear 15
Is about 130 degrees, and the moving distance of the door during this rotation is about 1.2 to 3 cm in the above numerical example, assuming that the entire stroke of the door is 90 cm. ~
70 seconds. Thereafter, the door is closed at a constant speed while being governed by the governor 20. Therefore, the operation of closing the door after a certain period of time has elapsed since the hand that substantially opened the door can be realized. Further, when the closing door is opened to the extent of the moving distance, the brake generator can be operated again, and the closing can be delayed.

The torque limit is for preventing a force applied when manually closing the door in the closing stroke by hand from being applied to the braking mechanism.

The driving side and the braking side may be arranged on the same sprocket shaft. Further, the speed control generator and the torque limit can be omitted.

[0018]

As described above, according to the present invention,
The braking action can be performed only at the initial stage when the closing operation is started in the automatic closing door, the opened door is not immediately closed, and the hand is released from the position where the door is opened,
In the initial stage of the transition to the closed state, the door is closed slowly (for example, a closing speed of about 25 to 70 seconds),
Even if you release your hand from the opened door, the door does not move quickly in the closing direction, it stays open for a long time, a considerable number of people can pass at the entrance and exit, automatic closing suitable for evacuation routes etc. A door and a braking method thereof can be provided.

The self-closing door of the present invention is not limited to an evacuation route, but can be applied to a revolving door and doors of a building entrance.

[Brief description of the drawings]

FIG. 1 is a mechanism diagram on a braking side for explaining an example of an embodiment of the present invention.

FIG. 2 is a drive side mechanism diagram for explaining an example of an embodiment of the present invention.

FIG. 3 is an overall explanatory diagram for describing an example of an embodiment of the present invention.

[Explanation of symbols]

1 door in closed position, 2 door in open position, 3 door
Roller chain, 4 ... drive side sprocket, 5 ... braking side sprocket, 7a, 7b, 7c ... constant load spring, 9 ...
Roll-in drum, 13 ... gear, 14 ... missing tooth gear, 15 ...
Brake gear, 16: rotating shaft, 17: braking generator.

Claims (2)

(57) [Claims] 1. A method of automatically closing a door, wherein the rotation of a rotating shaft interlocked with opening and closing of a door is transmitted to a braking means to perform braking, and when the rotating shaft returns and starts rotating by closing the door. Braking the rotating shaft by transmitting the rotation of the rotating shaft to the braking means only during the return rotation of the rotating shaft at a predetermined angle in the initial stage of the return rotation. Method. 2. The method according to claim 1, wherein the rotation of the rotating shaft in conjunction with the opening and closing of the door is transmitted to braking means via a toothless gear. Initially, the rotation of the rotary shaft is transmitted to the braking means and the rotary shaft is braked only until the rotary shaft returns to a predetermined angle and rotates by meshing with the toothless gear. Automatic closing door.