JPH0536695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application of the Invention> The present invention relates to a damper device, and particularly to a damper device suitable for opening and closing in conjunction with a ventilation fan to intake air in conjunction with exhaust from the ventilation fan.

<Conventional Technology> Conventionally, this type of tamper device includes, for example,
As shown in Utility Model Publication No. 59-16751,
Alternatively, there is known a method previously proposed by the present applicant in Utility Application No. 17086/1986.

<Problems to be Solved by the Invention> However, the damper device of Utility Model Publication No. 59-16751 is unsatisfactory in that the ventilation area is narrow due to the structure of the damper body, and sufficient ventilation performance cannot be obtained. On the other hand, the proposal proposed in Utility Application No. 17086/1986 is a step forward in terms of achieving sufficient ventilation performance, but it uses a rotary solenoid for driving, and this driving force is transmitted through a complicated path. Since the information is to be transmitted to the damper body,
There was still room for improvement in that the overall structure would be complicated and the cost would increase considerably, including the fact that the rotary solenoid, which is not very versatile, would be expensive.

In view of such conventional circumstances, in this invention,
It is an object of the present invention to provide a damper device that has sufficient ventilation performance, has a simple structure, and can be manufactured at low cost.

<Means for solving the problem> Specifically, a butterfly damper body opens and closes by rotating a pair of wing bodies around a hinge shaft, and a butterfly damper body that is driven by a motor so that the distal end side rotates around the base end as a fulcrum. It is an object of the present invention to provide a damper device comprising a pair of arm bodies that can be expanded and contracted, and a pair of wing bodies that are held between the arm bodies from the hinge shaft side so as to be rotatable in accordance with the expansion and contraction of the arm bodies. It is something to do.

<Function> In other words, by using a butterfly damper body, an aperture ratio of approximately 100% can be obtained and sufficient ventilation performance can be obtained. Since it is rotated, opened and closed by being held between the body, the structure is simple, and the driving source can be a general-purpose motor, which reduces costs. It is possible.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

In this damper device 1, a butterfly damper body 4 is opened and closed as a damper body by a pair of wing bodies 3, 3 rotating as shown by arrow A around a hinge shaft 2.
is used.

The wing body 3 of this butterfly damper body 4,
3 is held between a pair of arm bodies 5, 5, and the butterfly damper body 4 is opened and closed by expanding and contracting the tip side of each arm body 5 as shown by arrow B (FIG. 3).

The arm body 5 is driven by a motor 8 via a gear group 7 for deceleration, and its base end is fixed to a pair of fixed gears 9, 9, respectively. Both have the same number of teeth. That is, the movements of the pair of arm bodies 5, 5 are always synchronized by the pair of fixing gears 9, 9.

A spring 10 is provided on the hinge shaft 2 of the butterfly damper body 4, and the spring 10 always urges the blade bodies 3 in the closing direction. That is, the "opening action" of this butterfly damper body 4 is performed by the driving force of the motor 8, and the "closing action" is performed by the urging force of the spring 10. However, the closing "spring" does not necessarily need to be provided on the hinge shaft 2 as in this embodiment, but may be provided on the arm body 5 or the gear group 7.

Incidentally, during a power outage, the damper device 1 needs to be in a closed state, but if the motor 8 is of a type whose rotor rotates freely when no electricity is applied, the damper device 1 will be automatically closed by the closing spring 10. .

Reference numeral 11 denotes a frame body, through which the damper device 1 is attached to a ventilation duct or ventilation opening (not shown). Further, 12 is a bar member for fixing to the frame body 11 an assembly body 13 in which the motor 8, gear group 7, etc. are set in advance. Further, 14 is a roller for reducing friction between the arm body 5 and the wing body 3.

In this way, in this damper device 1, approximately
Sufficient ventilation performance is achieved with a 100% opening ratio.
Furthermore, the structure is as simple as assembling the assembly body 13, and the driving source can be the motor 8, which is a general-purpose product. As a result, the number of parts is small, making management and assembly easier, and reducing costs.

<Effects of the Invention> As explained above, the damper device according to the present invention uses a butterfly damper body, and opens and closes the butterfly damper body while being held between a pair of arm bodies driven by a motor. Therefore, while sufficient ventilation performance is obtained due to the aperture ratio of approximately 100%, the structure is simple, and the driving source can be a general-purpose motor, which is significantly lower in cost than conventional ones. It has the excellent effect of being able to be knocked down.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the damper device, Fig. 2 is a schematic side view showing the main parts of the damper device, and Fig. 3 is a schematic side view seen from the direction of the arrow in Fig. 2. . DESCRIPTION OF SYMBOLS 1... Damper device, 2... Hinge shaft, 3... Wing body, 4... Butterfly damper body, 5... Arm body, 8... Motor.

Claims (1)

[Scope of Claims] 1. A butterfly damper body that opens and closes by rotating a pair of wing bodies around a hinge shaft, and a pair of arm bodies that are driven by a motor and whose distal ends can expand and contract with the base end as a fulcrum. A damper device comprising: a pair of wing bodies that are sandwiched between the arm body from the hinge shaft side so as to be rotatable in response to expansion and contraction of the arm body.