JPH0356849Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a damper device for an air supply duct.

[Conventional technology]

In the case where the air is sent in only one direction by an air sending duct, the duct is provided with a chuck damper that opens due to the wind force that sends air from one direction, and a volume damper for adjusting the amount of air sent.

[Problem that the invention attempts to solve]

However, in such an air supply duct, since the dampers have different roles, the chit damper and the volume damper must be provided separately, resulting in an increase in the number of parts and troublesome installation work.

Therefore, the present invention was created in view of the above points, and aims to provide a damper device for air ducts that reduces the number of parts and simplifies installation work by equipping a chuck damper with the function of a volume damper. be.

[Means for solving problems]

The present invention is a damper device for an air duct that is equipped with a chuck damper in the air duct so that air can be fed in only one direction. The chuck damper is rotatably provided on the rotary shaft, a protrusion is planted on the rotary shaft, and an engagement hole into which the protrusion is loosely fitted is formed in the chuck damper, and the chuck damper is rotatably provided on the rotary shaft. It is characterized in that the opening degree of the chuck damper can be adjusted by rotating the protrusion to engage the edge of the engagement hole.

[Effect]

With the configuration described above, when air is supplied from one direction, the chatty damper is rotated about the rotation axis by the wind force and is in the open state. When the rotary shaft is rotated by operating the rotary shaft from the outside, the protrusion engages with the edge of the engagement hole of the chuck damper, rotates the damper, and adjusts the opening degree to adjust the air volume.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The chuck damper 3 provided in the passage 2 of the duct 1 has three dampers 4, 5, and 6 consisting of three stages: upper, middle, and lower.

The upper damper 4 is rotatably supported by a rotation shaft 8 via a sleeve 7 fixedly installed approximately in the middle thereof. When the damper 4 is fully closed, the upper part of the damper 4 comes into contact with a stopper 9 provided on the inner surface of the upper wall of the duct 1, and further rotation in the counterclockwise direction in FIG. 1 is restricted.

The rotation shaft 8 is rotatably installed between both side walls of the duct 1, and a worm gear 10 is fixed to one outer end thereof. This worm gear 10 includes a worm 1 fixed to the upper end of an operating rod 12 which is rotated by a handle 11 fixed to the lower end.
3 are engaged with each other, and by operating the handle 11 from the outside, the rotation shaft 8 is rotated via the worm 13 and the worm gear 10. Note that 14 is a gearbox.

Further, a protrusion 15 is implanted on the rotation shaft 8, and an elongated engagement hole 16 into which the protrusion 15 is loosely fitted is bored in the damper 4. This engagement hole 1
6 is preferably formed in a size that does not abut and engage with the edge of the loosely fitted protrusion 15 from the fully closed state to the fully open state of the damper 4.

On both sides of the damper 4, lever members 17 that swing about the rotation shaft 8 are rotatably provided integrally with the damper 4.

The upper portions of the middle and lower dampers 5 and 6 are fixed to support shafts 18 and 19, respectively, and lever members 20 and 21 are fixed to both ends of the support shafts 18 and 19, respectively. And the upper, middle, and lower dampers 4,
The lever members 17, 20, 21 of 5 and 6 are pivotally supported by pins 23, 24, 25 on a connecting plate 22 arranged in the vertical direction. Further, the lower part of the lower damper 5 comes into contact with a stopper 26 provided on the inner surface of the lower wall of the duct 1 when the damper 5 is fully closed, thereby restricting further rotation in the counterclockwise direction in FIG.

Next, to explain the operation of the device configured in this way, when air is blown from the right to the left in FIG. The dampers 4, 5, and 6 are rotated clockwise at the same time and are fully opened. Next, operate the handle 11 and press the operating rod 1.
When turning 2, worm 13 and worm gear 10
The rotation shaft 8 is rotated in the direction of the arrow in FIG.
This causes the protrusion 15 installed on the rotation shaft 8 to rotate. When this protrusion 15 rotates, the protrusion 15 engages with the edge of the engagement hole 16 of the upper damper 4, causing the damper 4 to
Rotate counterclockwise in FIG. By this rotation of the damper 4, the lever member 17, the connecting plate 22, the lever members 20, 21, the support shafts 18, 1
9, the middle and lower dampers 5, 6 also rotate counterclockwise in FIG. Therefore, by appropriately selecting the amount of rotation, the opening degree of the chuck damper 3 can be adjusted to obtain a desired air volume.

Then, when the air supply is stopped, the dampers 4, 5, and 6 move to the stoppers 9 and 6 due to their own weight.
It closes at the position where it contacts 6 and becomes a fully closed state.

Note that when air is supplied from the left to the right in FIG. 1, the dampers 4, 6 are in contact with the stoppers 9, 26, so the dampers 4, 5, 6 do not open.

[Effect of idea]

As described above, in the present invention, a chuck damper is rotatably provided on a rotary shaft that can be operated from the outside, and a protrusion implanted on the rotary shaft is loosely fitted into an engagement hole formed in the chuck damper. Since the swing damper can be rotated using the protrusion by rotating the moving shaft, it has the function of a volume damper that can also adjust the air volume, reducing the number of parts and simplifying the installation work.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention; Fig. 1 is a cross-sectional front view of a duct, Fig. 2 is a perspective view showing the main parts of the damper, and Fig. 3 is a cross-sectional side view showing the main parts of the duct. be. 1... Duct, 3... Chat damper, 4,
5, 6... Damper, 7... Sleeve, 8... Rotating shaft, 10... Worm gear, 12... Operating rod, 1
3...Worm, 15...Protrusion, 16...Engagement hole.

Claims (1)

[Scope of utility model registration request] In a damper device for an air duct which is equipped with a chuck damper in the air duct and is capable of feeding air only in one direction, a rotation shaft that can be rotated by external operation is installed in the air duct, The chuck damper is rotatably provided on the rotary shaft, a protrusion is implanted on the rotary shaft, and an engagement hole into which the protrusion is loosely fitted is formed in the chuck damper, so that the chuck damper is rotatably mounted on the rotary shaft. A damper device for an air supply duct, characterized in that the opening degree of the chuck damper can be adjusted by engaging a protrusion with an edge of an engagement hole.