JPH0714601Y2 - Automatic opening and closing device for revolving doors - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic opening / closing device for a revolving door used for doorways and the like.

2. Description of the Related Art Conventional technology and its problems Many automatic doors are of a type that opens and closes by sliding in the horizontal direction. This type of automatic door requires an opening space of about twice the door width for installation. Therefore, it is difficult to install in a place where there is not enough space, and there is a drawback that the frontage that can be used as an entrance is about half of the frontage required for installation.

On the other hand, in the revolving automatic door, almost the entire frontage of the door can be used as a doorway, and it can be easily installed even in a narrow place. However, conventionally, revolving automatic doors are
For example, like the one equipped with a mechanism that automatically opens and closes the door by a chain sprocket fixed to the rotating shaft of the door and a chain driven by an electric motor, the opening angle of the door corresponding to the rotation of the drive unit Has a structure that can be uniquely determined. Therefore, the door opening operation continues even after hitting a person on the opening side when opening the door, which is dangerous. Further, when the electric motor stops operating due to a power failure or the like, it is impossible to open or close, or it is necessary to disengage the drive unit and the door for manual opening and closing.

The object of the present invention is to solve these problems, to easily install it in a narrow place to secure a wide frontage, and to ensure safety on the door opening side when opening the door and simple manual opening and closing at the time of power failure. It is to provide an automatic opening / closing device for a revolving door that can be guaranteed.

Means for Solving the Problems The above object of the present invention is, in a rotary door operated by driving a motor, incorporating a transmission mechanism by a torsion spring into a transmission system for transmitting rotation from the motor to the door, and the transmission mechanism,
The present invention is achieved by an automatic opening / closing device for a rotary door, characterized in that a transmission medium by a torsion spring is provided by interposing between a driving member and a driven member in the transmission system.

The torsion spring may be a torsion bar or a torsion coil spring.

Further, the drive unit can drive the door to open the door in the range of about 90 ° to the opposite side regardless of which side the door is approached.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an automatic opening / closing device for a rotary door according to the present invention. This opening / closing device is mounted on a door (2) and a door frame (4), and includes a drive unit (1) and a rod-shaped spring (7). The drive unit (1) includes a drive motor (11), a worm (12), and a worm wheel (1
3) and gear (14). The drive motor (11) in the drive unit (1) stands in front of the door (2) by a detection means such as a switch incorporated in the foot mat (8) or an infrared sensor arranged on the side of the door. It is driven by a signal that is emitted by sensing a person. The rotation speed of the motor is an important element for controlling the opening / closing operation of the door. This setting is performed by the adjusting device (24). In this embodiment, the drive motor (11) is attached to the door frame. A worm (12) is attached to the rotating shaft of the motor, and the worm (1
2) meshes with the worm wheel (13), and the worm wheel (13) meshes with the gear wheel (14). The drive motor (11) may be equipped with a vertical brake, in which case the drive shaft of the motor and the rod spring (7) may be directly connected. The door (2) is
It is provided with door attachments (5) that are fixed to upper and lower portions of the side end face. On the other hand, the door frame (4) is provided with supporting members (6) fixed to upper and lower portions of the side end surface to support the door mounting member (5) from above. A shaft hole extending vertically through is provided in the central portions of the door attachment (5) and the support (6). The bar spring (7) is
Extending through a shaft hole of the door fitting (5) and the support (6), and serving as a rotating shaft for opening and closing the door (2),
One end is fixed to the gear (14) in the drive unit (1), and the other end is fixed to the lower door fitting (5) (see FIGS. 1 and 2).

This automatic switchgear operates as follows. When a drive signal is issued to the drive motor (11) by a person coming in front of the door being detected by the detecting means, the motor starts to rotate. As a result, the gear (14) rotates, and the upper end of the rod-shaped spring (7) also rotates accordingly. This rotational force is transmitted through the rod-shaped spring (7), reaches the lower end thereof, and is transmitted to the door attachment (5). This causes the door (2) to start rotating with the door fitting (5). The direction of rotation of the motor (11) is determined so as to rotate to the side opposite to the side on which the person is present, based on the person's discrimination by the detection means. The rotation operation of the door (2) proceeds later than the rotation operation of the gear (14) while causing elastic deformation of the rod-shaped spring (7) due to inertia or the like based on the mass of the door. If the rotation speed of the motor (11) is constant, the door (2) is gradually accelerated after the start of rotation and reaches the maximum rotation speed when it reaches the fully opened state, and there is a possibility that the door (2) may hit the side wall of the building strongly. Therefore, in order to prevent this, it is desirable to adjust the rotation speed of the motor (11) so as to decrease as the door opens. The rotation of the motor (11) is stopped based on the detection of the rotation amount when the motor reaches the rotation amount corresponding to the predetermined opening position of the door (2). The rotation speed and the rotation amount of the motor (11) are controlled by the adjusting device (24). Door (2)
Reaches the final open position by stopping the motor (11). Even if some external force acts to rotate the door in this state, the rotation of the motor (11) is suppressed by the engagement with the worm (12) and the worm wheel (13). Therefore, the door (2) rotates to some extent based on the spring action of the rod-shaped spring (7), but when the external force is released, the door (2) returns to its original position.

After the elapse of a predetermined time, the adjusting device (24) reversely rotates the motor (11) and rotates the same amount of rotation as when the door is opened, and then stops the motor. This closes the door (2). Also in this case, it is desirable to adjust the rotation speed of the motor (11) in consideration of the inertia of the door. The timing for starting the reverse rotation of the motor (11) can be appropriately determined, for example, after a predetermined time has elapsed from when the detection signal of the presence of the person by the detection means disappeared. The rod-shaped spring (7) also serves as a torsion bar for the force acting between the drive unit (1) and the door (2). Therefore, when there is a person in the direction in which the door (2) rotates, and when the person collides with the rotating door, the rotation of the door (2) stops at the position where it abuts the person and the motor ( The rotation of 11) proceeds while causing torsional deformation of the rod-shaped spring (7). Therefore, a person is not pushed by the door, and the motor is not damaged by an external force received from the door. The spring force of the rod-shaped spring (7) may have a low spring constant that is sufficient to stop the door from rotating when it is lightly contacted with a person.

In this embodiment, detection means for the approach of a person are provided on both sides of the door, and the drive (1) can open the door by about 90 ° to the opposite side of whichever side the person arrives. Is set. However, if the direction in which a person passes is always limited to one direction, the door may be opened only in that direction. Even if the motor (11) does not operate due to a power failure, if a person pushes the closed door (2), the rod-shaped spring (7) will be elastically deformed by twisting and the motor (11) will rotate. The door (2) can be opened without accompanying, and when the pressing force is released, the door (2) is closed by the action of the rod-shaped spring (7) as a torsion bar.

Further, as shown in FIG. 3, the drive unit (1) can be mounted on the door, in which case one end of the rod-shaped spring (7) is fixed to the gear (14) and the other end is a support member. It is fixed to (6).

In the above example, the rod-shaped spring (7) also serves as the rotation axis of the door, but the two may be separated. For example,
A sleeve-shaped shaft may be passed through the shaft holes of the door attachment (5) and the support (6) to prevent both ends from coming off, and the rod-shaped spring (7) may be passed through the through hole of the sleeve-shaped shaft. In this case, the rod-shaped spring (7) serves only as a transmission of rotational force and as a torsion bar. Further, when the spring force of the rod-shaped spring (7) is small and sufficient, for example, the rod-shaped spring (7) is shortened to extend only through the door attachment tool (5) and the support tool (6) on the upper side of the door. You can also do it. Further, a pair of upper and lower door attachments (5) and a support (6) are provided as a rotation axis of the door, and a door spring (5) and a support (6) for driving the door are provided above the door attachment (5) and the support (6). The lower end of 7) may be fixed.

The embodiment shown in FIG. 4 uses a spring device having coil-shaped springs (18) and (19) instead of the rod-shaped spring (7). The drive part (1 ') is provided on the upper part of the door (2'), and the worm (12 ') attached to the rotary shaft of the drive motor (11') meshes with the worm wheel (15). The worm wheel (15)
Is fixed to the upper end of a rotary shaft (17) extending parallel to the rotary shaft (A) of the door at the upper end of the door, and the rotary shaft (17)
A gear (20) is fixed to the lower end of the. A vertically extending bracket (22) is fixedly provided at a position corresponding to the upper end of the door in the door frame, and the rotating shaft (23) is supported by the bracket. The rotary shaft (23) is arranged so that its axis coincides with the rotary shaft (A) of the door, and the gear (21) is fixed to the center thereof, and the gear (21) meshes with the gear (20). Coil springs (18) and (19) are arranged above and below, sandwiching a gear (21), and these springs are wound in opposite directions. Both ends of each coil spring are fixed to the bracket (22) and the gear (21). Also in this example, the door (2 ') is rotated by the rotation of the motor (11') of the drive unit (1 ') as in the above-described example. In this case, the gear (20) itself rotates the gear (21) to some extent against the spring force of the coil springs (18) and (19), and the gear (21) itself.
The door (2 ') rotates around the axis (A). The safety of a collision during rotation and the effect of opening the door by human power at the time of power failure can be obtained as in the previous example.

After rotating the gear wheel (21) so as to increase the number of turns by twisting the coil springs (18) and (19) (after rotating the gear wheel (21) to the left when viewed from above in FIG. 4). Gears (20)
The spring force can be increased by engaging with the gear, and the coil springs (18) and (19) are twisted to rotate the gear (21) so as to reduce the number of turns and then mesh with the gear (20). If so, the spring force can be weakened.

Further, as shown in FIG. 5, it is also possible to install the drive unit (1 ″) on the door frame side and use the coil spring. In this case, the rotational force from the drive unit (1 ″) is a gear. It is transmitted to the shaft (23 ″) via (16), and the shaft (23 ″)
The rotational force is transmitted from the gear (21) fixed coaxially to the gear (20) fixed to the door (2 ″) side to rotate the door (2 ″).

EFFECTS OF THE INVENTION As is apparent from the above, according to the present invention, it is possible to easily install in a narrow place, to secure a wide entrance and exit, and to ensure safety on the opening side when the door is opened and simple operation at the time of power failure. It is possible to provide an automatic opening / closing device for a revolving door that can guarantee manual opening / closing.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a perspective view showing an automatic door opening / closing device together with a door and a door frame, and FIG. 2 is a front view showing a part of the details of the example of FIG. FIG. 3 is a front view showing details of part of another example, and FIGS. 4 and 5 are perspective views showing main parts of still another example which are different from each other. (1), (1 '), (1 ") ... drive section (2), (2'), (2") ... door (3), (3 '), (3 ") ... transmission section (4), (4 '), (4 ") ... door frame (7) ... rod springs (11), (11'), (11") ... motors (12), (12 '), ( 12 ″) …… Worms (13), (14) …… Wheels (15), (16), (20), (21) …… Gears (18), (19) …… Coil spring

Claims (4)

[Scope of utility model registration request] 1. In a rotary door driven by a motor, a transmission mechanism for transmitting rotation from a motor to a door is incorporated with a transmission mechanism by a torsion spring, and the transmission mechanism is provided between a driving member and a driven member in the transmission system. An automatic opening / closing device for a revolving door, characterized in that a transmission medium by a torsion spring is provided by intervening in the above. 2. The device according to claim 1, wherein the torsion spring is a torsion bar. 3. The device according to claim 1, wherein the torsion spring is a coil spring. 4. The motor drive allows the door to be driven so as to open the door in the range of about 90 ° to the opposite side regardless of which side the door is approached. The device according to claim 1, 2 or 3.