JPH0322472Y2 - - 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 gear reducer, and a cable wrapped around the drive wheel and driven wheel is connected to a door, and the cable is rotated by the rotation of the drive source. Automatic doors that open and close the door by rotating it are known.

However, with this structure, vibrations in the rotational direction generated by the drive source are propagated to the cables, and the door vibrates while opening and closing, making it impossible to open and close smoothly.

Therefore, as shown in Japanese Utility Model Application No. 58-15780, the cable was surrounded by a buffer member (elastic member), and this was attached to a hanger attached to the top of the door, and the cable was propagated to the above-mentioned cable. It is known that vibrations in the rotational direction generated by the drive source are absorbed and relaxed by a buffer member to prevent them from propagating to the door.

However, with this structure, the cables are discontinuous,
Insert the opposing ends into the hollow cushioning members, place a presser plate across the upper part between the opposing buffer members, fix this presser plate to the hanger with the mounting bolts, and connect the presser plate and the hanger together. Since the buffer member is clamped, the strength with which the cable is attached to the hanger becomes weak.

For this reason, when 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 propagates, the end of the cable may slip out of the buffer member, or the buffer member along with the cable may There is a risk that it may slip out between the handle and the hanger.
This may cause problems in opening and closing the door.

Note that if the buffer member is strongly clamped between the holding plate and the hanger to prevent it from slipping out, the elastic properties of the buffer member will be impaired, making it impossible to absorb and alleviate the vibrations in the rotational direction mentioned above, as well as absorbing the inertial shock mentioned above. It cannot be relaxed and propagates to the transmission mechanism, causing damage to the transmission mechanism.

Purpose of the invention: The vibration in the rotational direction generated by the drive source will not be transmitted to the door, and the cable will not come off from the door due to the inertial shock that occurs when the brake is applied during the opening/closing operation of the door. , and to absorb and alleviate the inertial impact to prevent damage to the drive unit.

Structure of the device A cable connecting rod connected to the cable is inserted into the tubular part of the cable connecting member fixed to the door, and a ring-shaped vibration-proofing elastic body is filled between the cable connecting rod and the tubular part. thing.

Embodiment FIG. 1 is an overall schematic front view of an automatic door, in which a door 3 is provided in the rectangular opening between the blind 1 of the door frame A and the left and right vertical frames 2, 2. The opening and closing operations are performed by a drive unit B provided inside the opening.

FIG. 2 is a perspective view of the drive unit, in which a drive source (motor) 4 and a speed reducer 5 are provided on one side in the longitudinal direction of the drive unit main body (not shown).
The driving wheel 6 and the intermediate wheel 7 provided on the input shaft of the reducer 5
is connected to the output shaft 9 of the reducer 5 by a cable 8.
is provided with a driving wheel 10, and a driven wheel 11 is provided on the other longitudinal side of the drive unit main body, and a cable 12 is wound around the driven wheel 11 and the aforementioned driving wheel 10, The cables 12 are discontinuous and connected by springs 13, and irregularities 14 are continuously formed on the inner peripheral surface in the longitudinal direction to form a timing belt shape.

A pair of door hangers 15, 1 are provided on the upper stile 3a of the door 3.
6 is fixed, and the door wheels 17 and 17 provided on the pair of door hangers 15 and 16 are placed on the rail 18, and the door 3 is configured to open and close along the rail 18. door hanger 15
is connected to the cable 12 via a mounting member 19.

Because of this, each time the drive source 4 is driven, the cable 12 rotates and the door 3 is opened and closed.

Fig. 3 is a partially cutaway front view of the cable connection part;
Horizontal piece 1 attached to one door hanger 15 with screws etc.
A cable connecting member 21 having a tubular portion 20 is fixed to the cable connecting member 5a with a screw 22 (the horizontal piece 15a and the cable connecting member 21 may be formed integrally). A cable connecting rod 23 is inserted into the cable connecting rod 23, and an annular vibration-proof elastic body (for example, urethane rubber) 2 is inserted between the cable connecting rod 23 and the tubular portion 20.
4 is filled, the cable connecting rod 23 and the cable connecting member 21 are integrally connected, and the vibration-proof elastic body 24 is elastically deformed in the longitudinal direction and the vertical direction of the cable so that they can be relatively displaced. be.

Both ends of the cable connecting rod 23 are connected to connecting tools 25, 25.
It is connected to the cable 12 and the spring 13 via.

Note that, as described above, the horizontal piece 15a is attached to the door hanger 15 with screws, etc., and when the door 3 is attached to and removed from the rail 18, the horizontal piece 15a is attached to the cable while the horizontal piece 15a is attached to the cable. By removing the door 3 from the door hanger 1, the door 3 can be attached to and detached from the rail 18, which has the advantage of making this operation easy.

Therefore, the vibration in the rotational direction generated in the drive source 4 propagates to the cable connecting rod 23 via the cable 12, but can be absorbed and alleviated by the elastic displacement of the vibration-proof elastic body 24.
It does not propagate to the door 3 side.

Therefore, the door 3 can be opened and closed smoothly.

In addition, the inertial impact in the direction of movement of the door that occurs when the brake is applied during the opening/closing operation of the door 3 can be absorbed and alleviated by the elastic displacement of the vibration-proof elastic body 24, and does not propagate to the cable connecting rod 23. , will not be propagated to the drive unit via the cable 12, and damage to the drive unit can be prevented.

Furthermore, since the annular vibration-proofing elastic body 24 is filled between the cable connecting rod 23 and the tubular portion 20 of the cable connecting member 21, the vibration-proof elastic body 24 absorbs the above-mentioned inertial impact.
This can be absorbed by the elastic displacement of , and the cable 12 will not come off from the door 3 due to the inertial impact.

In addition, since the cable connecting rod 23 can swing vertically relative to the cable connecting member 21, even if the cable 12 temporarily sag vertically during opening and closing of the door, the cable connecting rod 23 can swing vertically with respect to the cable connecting member 21. The cable connecting rod 23 swings up and down to follow the slack, and no unreasonable force is applied to the connecting part of the cable 12, causing mechanical fatigue, so that the cable will not be severed at that part.

FIG. 4 is a partially cutaway front view showing another embodiment of the cable connection section, in which the cable connection rod 23 has a threaded portion 23a.
is inserted into the tubular body 26 so as to be slidable in the longitudinal direction, and an annular vibration-proof elastic body 24 is filled between the tubular body 26 and the tubular portion 20 of the cable connection body 21. A pair of nuts 27, 27 are screwed into the threaded portion 23a of the cable connecting rod 23, and the pair of nuts 27, 27 are attached to both sides 26a, 2 of the tubular body 26.
It is tightened to 6b.

With this configuration, by loosening and tightening the nuts 27, 27 depending on the size of the door, the length of the cable, etc., the cable connecting rod 23 can be moved in the longitudinal direction, and the door 3 and the cable can be connected. The connection position with the strip 12 can be adjusted in the longitudinal direction.

Effects of the invention The vibration in the rotational direction generated by the drive source can be absorbed and relaxed by the elastic displacement of the vibration isolating elastic body and prevented from propagating to the door, allowing the door to open and close smoothly.

In addition, the inertial impact that is applied when the brake is applied during the opening/closing operation of the door can be absorbed and alleviated by the elastic displacement of the vibration isolating elastic body, and does not propagate to the cable, thereby preventing damage to the drive unit.

In addition, since an annular vibration-proof elastic body is filled between the tubular part of the cable connection member fixed to the door and the cable connection rod, inertial shock can be absorbed and alleviated by the elastic displacement of the vibration-proof elastic body, and the inertia The cable will not come off the door due to impact.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; Fig. 1 is a general schematic front view of the automatic door, Fig. 2 is a perspective view of the drive unit, and Figs. 3 and 4 show different embodiments of the cable connection section. It is a partially cutaway front view shown. 3 is a door, 4 is a drive source, 10 is a drive wheel, 11 is a driven wheel, 12 is a cable, 20 is a tubular part, 21 is a cable connection member, 23 is a cable connection rod, and 24 is a vibration-proof elastic body.

Claims (1)

[Scope of utility model registration request] In an automatic door in which a cable 12 is wound around a driving wheel 10 and a driven wheel 11 connected to a drive source 4 and a door 3 is connected to the cable 12, a tubular part 20 is attached to the door 3.
The cable connecting member 21 having a
The cable connecting rod 23 inserted into the cable connecting rod 23 is connected to the cable connecting rod 12, and the cable connecting rod 23 and the cable connecting member 2 are connected to each other.
1. An automatic door characterized in that an annular vibration-proof elastic body 24 is filled between a pipe section 20 and a pipe section 20.