JP2813372B2 - Automatic closing door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a door to an emergency evacuation route in a tunnel, and in particular,
The present invention relates to a self-closing door suitable for being attached to a place where power cannot be supplied, a place where the power may be cut off due to an accident or the like, or a place where it is difficult to draw power again due to remodeling work or the like.

(Prior Art) Conventionally, most automatic doors are opened by detecting a person who enters or exits with a photoelectric switch or another detection switch, and automatically closed 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. Furthermore, since an electric circuit is used as a control circuit in each case, the power supply is indeterminate.

Some doors are opened manually, but only closed automatically. The self-closing door is configured to store a spring when it is opened, and to close the door with the stored spring force. If you release the door, the door will close rapidly, so if you want people to pass continuously, you must always hold it down or open it one after another,
Difficult to pass and can be dangerous.

Recently, it has become essential to provide an evacuation passage in a tunnel for evacuation in the event of an accident such as a fire. In the event of an accident, the access doors must be closed after evacuation to prevent the ingress of smoke and gas. In the event of an accident, a power outage is conceivable, so the entrance door cannot be replaced with 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.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems, and the closing operation is automatically performed without using a power supply. Time (for example, 25
(Approximately 70 seconds), so that a large number of people can pass in the meantime, or the door that is being closed can be reopened to further extend the closing time. It is assumed that.

(Means for Solving the Problems) The present invention relates to a storage spring that accumulates energy during an opening operation in conjunction with opening and closing operations of a door, and releases a storage force in a direction to close the door during a closing operation, and a door. The rotation of the second rotating shaft and the toothless gear provided on the second rotating shaft are transmitted to the rotating shaft of the brake generator so as to mesh with the gear provided on the first rotating shaft in conjunction with the opening and closing of the brake generator. An automatic opening / closing door having the brake generator to which rotation of the first rotation shaft is transmitted via a one-way clutch provided in a transmission mechanism, wherein the toothless gear is configured to open and close the door. In a predetermined rotation angle range of the first gear in an initial stage and an initial period of the closing operation, the rotation of the first rotation shaft is transmitted to the second rotation shaft by a gear portion of the toothless gear; Outside the rotation angle range, the toothless portion of the toothless gear causes the The one-way clutch does not transmit the rotation of the first rotation shaft to the second rotation shaft, and the one-way clutch converts the rotation of the second rotation shaft to the rotation shaft of the brake generator during the closing operation of the door. And in the opening operation of the door, the rotation of the second rotating shaft is not transmitted to the rotating shaft of the brake generator.

(Operation) The present invention has an energy-storing spring that is interlocked with the opening / closing operation of a door, accumulates energy during an opening operation, and discharges energy in a direction to close the door during a closing operation. ,
The door can be closed automatically.

Further, a toothless gear provided on the second rotating shaft so as to mesh with a gear provided on the first rotating shaft which is linked with opening and closing of the door, and a rotation of the second rotating shaft is provided by a rotating shaft of the brake generator. And a brake generator to which the rotation of the first rotating shaft is transmitted via a one-way clutch provided in a transmission mechanism for transmitting the rotation to the first rotation shaft. In the initial stage of the closing motion, the rotation of the first rotation shaft is transmitted to the second rotation shaft by the gear portion of the toothless gear within a predetermined rotation angle range of the first gear, and the rotation of the second rotation shaft is controlled. A one-way clutch provided in a transmission mechanism for transmitting to the rotating shaft of the braking generator transmits the rotation of the second rotating shaft to the rotating shaft of the braking generator, so that during the predetermined rotation angle range, The closing operation can be performed slowly by the braking force of the braking generator. Beyond the predetermined rotation angle range, the first rotating shaft is not transmitted to the second rotating shaft by the toothless gear portion, so that the braking force of the braking generator does not act, and the closing operation is performed at an increased speed. Can be made.

In the initial stage of the opening operation of the door, in the predetermined rotation angle range of the first gear, the rotation of the first rotation shaft is transmitted to the second rotation shaft by the gear portion of the toothless gear, and the closing operation is performed. Initially, a state is prepared in which the first gear and the gear portion of the toothless gear can mesh with each other. In this release operation, the one-way clutch does not transmit the rotation of the second rotating shaft to the rotating shaft of the braking generator, so that the braking generator does not become a load.

(Embodiment) FIGS. 1 to 3 are diagrams for explaining an embodiment of the present invention. FIG. 1 is a mechanical diagram on the braking side, FIG. 2 is a mechanical diagram on the driving side, and FIG. The figure is an overall explanatory diagram.

Description will be made with reference to FIG. In the figure, 1 is a door in a closed position,
Reference numeral 2 denotes a door at an open position, 3 denotes a roller chain, 4 denotes a driving sprocket, 5 denotes a braking sprocket, 30 denotes a suspension rail, and 31 denotes a suspension roller. The door is suspended on the suspension rail 30 by the suspension roller 31, moves while being guided by the suspension rail, and is attached to the roller chain 3. By opening the door 1 by hand, the roller chain 3 is driven as the door 1 moves. As a result, the driving sprocket is rotated, and the rotational force is stored in the spring. As will be described later, the load connected to the braking side sprocket 5 does not become a rotational load because it passes through a one-way clutch. 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, but at this time, the one-way clutch is engaged, so that the door is 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 which 6 is a sprocket 4 shown in FIG.
7A, 7B and 7C are fixed load spring fixed shafts, 8A, 8B and 8C are fixed load spring fixed shafts, 9 are constant load spring winding drums, and 10A, 10B and 10C are fixed load spring fixed members. It is. The fixing members 10A, 10B, 10C are flat portions 11A, 11B, 1 of the winding drum.
It is screwed to 1C and clamps 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 driving sprocket 4
The drive shaft 6 is rotated in the direction of the arrow, and the constant load spring is wound around the winding drum 9 to accumulate energy. When the hand is released from the door, the winding drum is driven in the direction opposite to the arrow by the constant load and constant load spring, and the driving sprocket moves the roller chain to close the door.

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 which 12 is an interlocking shaft that interlocks with the braking sprocket 5 in FIG. 3, 13 is a gear fixed to the interlocking shaft 12, and 14 is a toothless gear , 15 is a braking gear, 16 is a rotating shaft interlocked with the braking generator 17, 18 is a speed regulating gear, and 19 is a rotating shaft interlocked with the speed regulating generator 20. The toothless gear 14 has two pins 14A and 14
B is implanted, and fixed springs 22A and 22B engageable with B are fixed to a frame (not shown). A trick limit is interposed between the braking side sprocket 5 and the interlocking shaft 12.
Further, 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 rotationally drive the braking power-off, and the rotation of the governing gear 18 is transmitted to the rotation shaft 19. Then, the speed control generator 20 is rotationally driven. Reference numeral 21 denotes a position regulating spring that regulates the position of the braking gear to a position where the missing gear can easily mesh.

The operation on the braking side will be described. FIG. 1A is a view showing a state in which a door is closed. When the door is opened by hand, the gear 13 rotates in the direction of the arrow. Since the pin 14A is pressed by the spring 22A in the direction of the arrow, the toothless gear 14 meshes with the gear 13 and rotates in the direction of the arrow. Since the braking gear 15 is restricted to a position where it can easily mesh with the toothless gear 14 by the spring 21, when the toothless gear 14 rotates about 80 degrees, the braking gear 15 meshes with the toothless gear 14 and rotates. Thus, because of the one-way clutch, the rotating shaft 16 is not rotated. Further, when the gear 13 continues to mesh with the toothless gear 14 and the toothless gear 14 is rotated about 210 degrees in this embodiment, the state shown in FIG. 1B is reached, and thereafter, only the gear 13 rotates. I do.

The gear ratio is selected such that the rotation of the toothless gear at about 210 degrees is a distance that is sufficiently shorter than the full travel of the door (for example, about 1/20 to 1/50 of the full travel). . Therefore, the state shown in FIG. 3B is maintained until the opening operation is stopped.

When the hand is released from the opened door, the gear train starts to move from the state shown in FIG. 1B. 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. Missing gear
The braking gear 15 meshing with 14 drives a braking generator 17 via a one-way clutch to perform dynamic braking. At the same time, gear
The governing gear 18 meshing with 13 drives the governing generator 20 via a one-way clutch, but at this time, the braking generator operates and the rotation speed is slow, 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 significantly 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 missing tooth portion, and the braking action ends. The meshing between the toothless gear 14 and the braking gear 15 is about 130 degrees in the rotation angle of the toothless gear 14 in the above example, and the moving distance of the door during this rotation is the total numerical value of the door in the above numerical example. If the stroke is 90 cm, it is about 1.2 to 3 cm, and the time between them is 25 to 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. In addition, 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 forcibly 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.

(Effects) As described above, according to the present invention, the closing operation is automatically performed without using a power source, and the operation in the initial stage of closing is performed slowly (for example, the closing operation is performed for about 25 to 70 seconds). Speed), the open state continues for a long time, a considerable number of people can pass, and an automatic closing door suitable for evacuation routes and the like can be provided.

In addition, since the toothless gear is used, the braking mechanism does not work when the braking mechanism is released, and can be closed with a weak torque,
The accumulating force of the accumulating spring can be effectively applied to the closing operation, and can be opened with a small force when opening.

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

[Brief description of the drawings]

1 to 3 are diagrams for explaining an embodiment of the invention of the present application. FIG. 1 is a mechanical diagram on the braking side, FIG. 2 is a mechanical diagram on the driving side, and FIG. FIG. 1 door in closed position 2 door in open position
3 ... Roller chain, 4 ... Drive side sprocket,
5 ... Sprocket on braking side, 7A, 7B, 7C ... Spring with constant load,
9 ... wrapping drum, 13 ... gear, 14 ... missing tooth gear,
15… Brake gear, 16… Rotary shaft, 17… Brake generator.

Claims (1)

(57) [Claims] A first energy storage means for interlocking with the opening and closing of the door, interlocking with the opening and closing operation of the door, accumulating energy at the time of opening operation, and releasing the energizing force in the direction of closing the door at the time of closing operation; A toothless gear provided on the second rotating shaft so as to mesh with a gear provided on the rotating shaft, and one direction provided on a transmission mechanism for transmitting rotation of the second rotating shaft to the rotating shaft of the brake generator. An automatic opening / closing door having the control generator to which rotation of the first rotation shaft is transmitted via a clutch, wherein the toothless gear is provided at an initial stage of an opening operation of the door and an initial stage of a closing operation of the door. In a predetermined rotation angle range of the first gear, the rotation of the first rotation shaft is transmitted to the second rotation shaft by a gear portion of the toothless gear, and outside the predetermined rotation angle range, The rotation of the first rotation shaft is controlled by the second tooth by the toothless portion of the toothless gear. The one-way clutch, in the closing operation of the door,
The rotation of the second rotating shaft is transmitted to the rotating shaft of the brake generator, and in the opening operation of the door, the rotation of the second rotating shaft is not transmitted to the rotating shaft of the brake generator. A self-closing door characterized in that: