JPH0444588A - Upper limit bumping device for overdoor - Google Patents

Abstract

PURPOSE:To relieve the stopping impact of a door curtain and prevent a suspended state from being generated by fitting an electromagnet on a bumper set near the terminal of the containing section of the door curtain, and by electrifying for a required time before and after the door curtain is struck against. CONSTITUTION:At the terminal position of the containing section of the door curtain 4 of an overdoor, a bumper 15 is set, and at a section in contact with the door curtain 4, an electromagnet 16 for attracting the door curtain 4 is fitted. After that, the electromagnet 16 is electrified for a required time from a proper time before or after the door curtain 4 is struck against. When the door curtain 4 is contained, then the inertia force is sucked by the bumper 15, and the door curtain 4 and the bumper 15 are integrally formed with the attraction of the electromagnet 16, and the door curtain 4 is contrived not to be sprung back.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an overdoor upper limit shock absorbing device.

[Prior Art] One type of door for buildings is an overdoor in which a door curtain formed by connecting panels in a flexible manner is retracted substantially along the ceiling when the door is opened.

Referring to FIG. 3, a manual opening/closing type overdoor will be explained.

Continuing with the lifting guide rails 1 provided on both sides of the entrance and exit, storage guide rails 2 are provided along the ceiling, and both guide rails 1 and 2 have rollers ( (not shown) are fitted together so that they can be transferred freely.
The door curtain 4 is raised and lowered along both guide rail portions 1.2 and retracted.

In addition, 5 in FIG. 3 is a door curtain balance mechanism, and the door curtain balance mechanism 5 has a shaft 7 rotatably provided above both pillars of the entrance via a bracket 6. A wire drum 8 is fixed. A wire 9 wound around the wire drum 8 is attached to the lower end of the door curtain 4. A balance spring 10 is provided on the shaft 7, and the wire drum 8 is biased to rotate in the wire winding direction via the shaft 1.

Therefore, the weight of the door curtain 4 and the balance spring 1
The pulling force caused by 0 is balanced, and the door curtain 4 can be easily opened and closed manually.

Further, a door curtain stopper (not shown) is provided in the storage section of the door curtain 4, and is used to position the door curtain 4 in the storage section.

[Problems to be Solved by the Invention] However, there are individual differences in the operating force of the person who opens and closes the door curtain, and when the door curtain is opened with force, the door curtain violently collides with the stopper. As a result, the connecting portion between the stopper and the panel may be damaged, and the product may hit the stopper and bounce back.

The above-mentioned balance spring also has a small upward pulling force when the door curtain is in the retracted state and in the vicinity, and if the door curtain rebounds due to the frictional force between the door curtain and the guide rail, the door curtain will remain slightly lowered. Stop at.

Additionally, some stoppers are equipped with a shock absorbing spring, but although the shock force is alleviated by the shock absorbing spring, the door curtain may still be slightly lowered due to the pushing back of the shock absorbing spring. .

When the door curtain is slightly lowered, the height of the opening is lowered, which impedes the passage of vehicles and spoils the appearance of the entrance.

In view of these circumstances, the present invention aims to alleviate the impact of stopping the door curtain when it is opened, and to prevent the door curtain from drooping.

[Means for Solving the Problems] The present invention provides a shock absorber at the end position of the door curtain storage section of the overdoor, attaches an electromagnet for adsorbing the door curtain to the door curtain abutting portion of the shock absorber, and attaches an electromagnet to the electromagnet. The present invention is characterized in that it is configured to be energized for a required period of time from t and an appropriate time before the door curtain collides with the door curtain.

[Function] When the overdoor is opened and the door curtain is retracted, the inertial force of the door curtain is absorbed by the shock absorber to obtain a buffering effect, and during the shock absorbing action, the door curtain and shock absorber are integrated by electromagnet attraction. The door curtain will not bounce back.

The door curtain is then stored in the proper position determined by the buffer.

[Example〕 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, guide rails and the like are omitted, and only the main parts of this embodiment are shown.

A shock absorber 15 consisting of a hydraulic damper 12 and a spring 10 biasing a rod 13 of the hydraulic damper 12 in the direction of extension is provided at the storing section and the terminal end of the door curtain 4. The buffer 1
Reference numeral 5 is provided on the ceiling or a storage guide rail section so that its position can be adjusted in the axial direction. Further, an electromagnet 16 is provided at the tip of the rod 13 of the shock absorber 15.

A suction iron plate 17 is fixed to the upper end surface of the door curtain 4 at the contact position of the electromagnet 16, and is placed close to either the front or back surface of the panel 3 at a desired position (in this embodiment, the surface of the topmost panel). A sensing member 18 for switch operation is fixed.

Slightly away from the passing trajectory of the sensing member 18, and at the same time as the iron plate 1.
7 comes into contact with the electromagnet 16 at a required distance before the sensing member 1
A proximity switch 19 is provided opposite to 8.

As shown in FIG. 2, the electromagnet 16 is connected to a power source 21 via a timer 20, and the timer 20 is connected to a timer operating power source 22 via the proximity switch 19.

The operation will be explained below.

When the door curtain 4 is pushed up, it is stored in the storage guide rail part 2 via the lifting guide rail part 1 (see Fig. 3).
.

When the door curtain 4 moves to just before the final storage position, the sensing member 18 reaches a position opposite the proximity switch 19, and the proximity switch 19 senses the sensing member 18 and operates, thereby connecting the timer 20 and the power source for timer operation. 22. The timer 20 is activated and the electromagnet 16 is energized and excited.

The door curtain 4 collides with the buffer 15 at the end.

At the time of this collision, the electromagnet 16 is energized, so
The electromagnet 16 attracts the iron plate 17 at the moment of collision. The inertial force of the door curtain 4 is absorbed by the damper 12 and the spring 14.

The door curtain 4 and the shock absorber 15 generate vibrations while being attracted to each other, and eventually attenuate and stop. Note that the damping state of this vibration is determined by appropriately selecting the damping force of the damper 12.

The stopping position of the door curtain 4 is determined by the position of the electromagnet 16 when the damper 12 is extended by the spring 14. The stop position of the door curtain 4 is adjusted by adjusting the position of the shock absorber 15 and adjusting the rod length.

The operating time of the timer 20 is set to be a time sufficient for the door curtain 4 to stop at the final retracted position, and after the door curtain 4 is finally retracted and the set operating time of the timer 20 has elapsed, the electromagnet is activated. 16 is in a de-energized state.

When closing the door curtain 4, use the electromagnet 1 as described above.
6 is de-energized, so it can be lowered manually without any problem.

Note that if the electromagnet has sufficient adsorption power, the damper can be omitted, and in order to reduce the impact when the iron plate and electromagnet come into contact, the iron plate may be attached to the panel via a rubber plate. Of course, a photoelectric switch, a microswitch, etc. may be used instead of the switch.

Furthermore, it goes without saying that various changes may be made without departing from the spirit of the present invention, such as a switch for operating the electromagnet may be provided to detect movement of the damper or the electromagnet.

[Effects of the Invention] As described above, according to the present invention, it is possible to effectively absorb the impact when the overdoor door curtain is retracted, and the retracted position can always be set at the appropriate position regardless of the operating force of the door curtain. It has a great effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing essential parts of an embodiment of the present invention, FIG. 2 is a conceptual diagram of the embodiment, and FIG. 3 is a perspective explanatory diagram of an overdoor. 4 is a door curtain, 12 is a hydraulic damper, 14 is a spring, 15 is a buffer, 16 is an electromagnet, 19 is a proximity switch, and 20 is a timer. Figure 1

Claims (1)

[Claims] 1) A shock absorber is installed at the end of the door curtain storage section of the overdoor, and an electromagnet for adsorbing the door curtain is attached to the point where the shock absorber contacts the door curtain, and the electromagnet is attached to the shock absorber at an appropriate time before and after the door curtain collides. An overdoor upper limit shock absorbing device characterized in that it is configured to conduct electricity.