JPH0322471Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to automatic doors installed at entrances and exits of buildings.

Prior Art A drive source such as a motor is connected to a drive wheel via a transmission mechanism, and a cable is wound around the drive wheel and the driven wheel.
It is known that a door is connected to this cable, and the door is opened and closed by rotating the cable using a drive source.

However, with this structure, the transmission mechanism such as the drive wheel may be damaged due to an inertial impact in the direction of movement of the door that occurs when a brake is applied to the door during the opening/closing operation.

Therefore, as shown in Japanese Unexamined Patent Publication No. 57-51388, an intermediate annular portion made of a vibration-proof elastic body is provided between a metal inner peripheral portion and a metal outer peripheral portion to form a driving wheel. An automatic door is known in which inertial impact is absorbed and relaxed by an intermediate annular portion to prevent it from propagating to the transmission mechanism.

However, with this configuration, the driving force transmitted from the drive source to the drive wheels is supported by the vibration-proof elastic body of the intermediate annular part, so the vibration-proof elastic body of the intermediate annular part itself may be damaged (for example, cracked). , the mounting surface between the vibration-proof elastic body of the intermediate annular part and the metal inner and outer circumferential parts may slip in the relative rotational direction, making it impossible to reliably transmit the driving force to the drive wheels. There is a drawback.

In addition, the cable connected to the door that opens and closes is wrapped around the drive wheel, and when the brake is applied in the middle of opening and closing the door, an inertial shock in the direction of movement acts on the door. The inertial impact also acts on the cables, causing an unreasonable rotational action to propagate to the drive wheels.

Due to this forced rotation, the vibration isolating elastic body of the intermediate annular portion itself may be damaged as described above, or the vibration isolating elastic body of the intermediate annular portion and the metal inner and outer peripheral portions may be damaged. There is a drawback that the mounting surface may slip in the relative rotational direction, causing damage to the entire transmission mechanism.

The above means that a rotating body is installed between a drive source such as a gear of a transmission mechanism and a driving wheel, and an intermediate annular part made of a vibration-proof elastic body is installed between a metal inner circumference and an outer circumference. This also occurs when the structure is

Purpose of the invention It is possible to prevent damage to the transmission mechanism by attenuating and absorbing the inertial shock in the direction of movement of the door that occurs when the brake is applied during the opening/closing operation of the door, while also ensuring that the driving force of the drive source is transmitted to the cable. The purpose is to enable the door to open and close reliably.

Composition of the invention A driving wheel, an intermediate wheel, which connects a driving source and a driving wheel,
At least one of the gears and drive wheels of a gear reducer is rotatably attached to a rotating shaft equipped with a friction disk, and is crimped to the friction disk by a crimping means equipped with a spring.

Embodiment FIG. 1 is a front view showing a part of the drive unit of an automatic door.The drive unit main body 1 has a drive source (motor) 2 on one side in the longitudinal direction, and a gear reducer connected to the drive source 2. 3 is provided, and this gear reducer 3
A driving wheel 5 is fixed to the output shaft 4 of the output shaft 4 to constitute a transmission mechanism, and a driven wheel 6 is attached to the other side in the longitudinal direction.
A cable 7 such as a belt is wound around the driven wheel 6 and the drive wheel 5, and a spring 8 is provided on the cable 7, thereby forming a drive unit for the door. are doing.

A guide rail 9 is formed along the lower edge of the drive unit main body 1 in the longitudinal direction, and a pair of hanging door wheels 11 attached to the door 10 are attached to the guide rail 9.
11 is slidably mounted and supported, and the cable 7 and the door 10 are connected by a connector 12.

FIG. 2 is a plan view of the transmission mechanism, in which a driving wheel 14 is mounted on the driving shaft 13 of the drive source 2, and a gear reducer 3 is connected to the driving shaft 13 of the drive source 2.
An intermediate wheel 16 is attached to each of the input shafts 15, and a cable 17 is wound around the intermediate wheels 16 and the driving wheel 14, and the input shaft 15 and the output shaft 4 are connected to each other. A small gear 18 and a large gear 19 meshed with each other are attached respectively.

FIG. 3 is a partially cutaway front view of the drive wheel 5, and FIG. 4 is a longitudinal sectional view. The drive wheel 5 is rotatably attached to the output shaft 4, and the drive wheel 5 is not rotatably attached to the output shaft 4. It is crimped by crimping means 22 to a friction disk 21 attached to the.

The drive wheel 5 has an inner circumference 5a rotatably attached to the output shaft 4, and an outer circumference 5b around which the cable 7 is wound.
and an intermediate part 5c that integrally connects the inner peripheral part 5a and the outer peripheral part 5b, forming an annular body, and the friction disk 2
1, a ring-shaped rubber body 21b serving as a friction member is attached to a disc 21a connected to the output shaft 4 through a spline key fit.

The crimping means 22 includes a nut 23 screwed onto the output shaft 4, a spring holding plate 24, and a spring 25, and the spring 25 is provided between the spring holding plate 24 and the intermediate portion 5c of the drive wheel 5. Spring holding plate 2 with nut 23
4 is prevented from moving, and a spring 25 presses the drive wheel 5 toward the friction disk 21 side to press it against the ring-shaped rubber body 21b.

Therefore, if the drive source 2 is driven, the driving shaft 1
3. The output shaft 4 rotates via the driving wheel 14, the cable 17, the intermediate wheel 16, and the gear reducer 3, and the rotation of the output shaft 4 rotates the drive wheel 5, and the cable 7 is rotated. Therefore, the door 10 can be opened and closed.

In addition, the drive wheel 5 and the friction disk 21 by the spring 25 are connected to each other.
If a rotational force (torque) greater than the pressure applied to the drive wheel 5 is applied to the drive wheel 5, the output shaft 4
can be displaced in the rotational direction while resisting the pressing force of the spring 25.

Because of this, even if the inertial impact in the direction of movement of the door 10 that occurs when the brake is applied during the door opening/closing operation is propagated to the drive wheels 5 via the cable 7,
The rotational force due to the inertial impact is attenuated and absorbed (absorbed and relaxed) by the displacement of the drive wheel 5 in the rotational direction, and is not propagated to the output shaft 4.

Therefore, the above-mentioned inertial impact is received by the drive wheels 5 and is not transmitted to the transmission mechanism.
Since the transmission mechanism will not be damaged, the cable 7 will not be cut, and temporary deflection due to inertial impact will not occur, the cable can be moved away from the rotating wheels such as the driving wheel 5 and the driven wheel 6. Never leave.

Furthermore, during normal door opening/closing operations, the driving wheel 5 and the friction disk 21 are crimped by the crimping means 22, and the rotational force (torque) necessary for the door opening/closing operations can be reliably transmitted to the cable 7, and the door 7 can be securely closed. Can be opened and closed.

Also, since the spring holding plate 24 can be moved by tightening and loosening the bolt 23, the spring 25
The spring force of the door can be adjusted, and the degree of damping relaxation can be adjusted depending on the magnitude of the inertial shock that occurs when the door is braked during opening/closing. The degree of transmission (the amount of rotational force to be transmitted) can be adjusted.

Although the driving wheel 5 has been described in the above embodiment, the driving wheel 14 and the intermediate wheel 16 may be constructed in the same manner, and the large gear 19 may be constructed as shown in FIG.

That is, the large gear 19 is rotatably attached to the output shaft 4, the friction disk 31 with the ring-shaped rubber body 31b attached to the disk 31a is attached non-rotatably to the output shaft 4, and the screw of the output shaft 4 is A spring holding plate 33 held by a nut 32 screwed into the portion 4a and a large gear 19
A spring 34 is provided between the large gear 19 and the friction disk 31.

Further, the small gear 18 may be configured as described above.

If the drive wheel 5 is made of an elastic material such as urethane rubber, the vibration in the rotational direction generated from the drive source 2 can be absorbed and alleviated by the elastic material, and the aforementioned vibration can be prevented from propagating to the door. Can be opened and closed smoothly.

Effects of the invention: The inertial impact in the direction of door movement that occurs when the brake is applied during the door opening/closing operation can be damped and absorbed.
Since the transmission mechanism is not propagated, damage to the transmission mechanism can be prevented, and the driving force of the drive source can be reliably transmitted to the cable during normal door opening/closing operations.
Doors can be opened and closed reliably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partial front view of the door drive unit, Fig. 2 is a plan view of the transmission mechanism, Fig. 3 is a partially cutaway front view of the drive wheel, and Fig. 4 is a partially cutaway front view of the drive wheel. A vertical sectional view, FIG. 5 is a sectional view of a large gear portion of a gear reduction gear. 2 is a drive source, 3 is a gear reducer, 4 is an output shaft, 5
is a driving wheel, 6 is a driven wheel, 7 is a cable, 14 is a driving wheel, and 16 is an intermediate wheel.

Claims (1)

[Scope of utility model registration request] a drive source 2; a driving wheel 14 attached to the drive source 2;
an intermediate wheel 16 driven by the driving wheel 14 via a cable 17; a gear reducer 3 in which the intermediate wheel 16 is attached to the input shaft 15 and the drive wheel 5 is attached to the output shaft 4; In an automatic door equipped with a cable 7 wound around a driving wheel 5 and a driven wheel 6, and a door 10 connected to the cable 7, the driving wheel 14, the intermediate wheel 16, the driving wheel 5, and the gear reducer 3 are provided. An automatic door characterized in that at least one of the gears is rotatably attached to a rotating shaft provided with friction disks 21, 31, and is crimped to the friction disks 21, 31 by a crimping means equipped with a spring. .