JPH0447547Y2 - - Google Patents

Description

[Detailed explanation of the invention] Purpose of the invention (1) Industrial application field The present invention is a damper that is installed between a duct installed on a ceiling board of a building, and is particularly suitable for use as a damper for adjusting air volume. Regarding.

(2) Prior Art In order to adjust the air volume in an air conditioning duct, a mechanism is known in which a damper is interposed in the middle of the duct and the damper blades of the damper are opened and closed.

Such a damper consists of a box frame having a required width in the thickness direction, a rotating shaft that is supported by a bearing provided within the frame, and a rotating shaft that is fixed to the rotating shaft and that controls ventilation within the frame. It is equipped with a blade that rotates to open and close the mouth, and an external drive mechanism such as a handle or a worm gear mechanism connected to the rotating shaft of the blade to drive the blades to open and close from the outside.

(3) Problems that the invention aims to solve However, with the above configuration, the structure is complicated because it has an external drive mechanism, despite the functional requirement that only the air volume can be adjusted accurately. The disadvantage is that the number of parts is large and the cost is high, and it is difficult to arbitrarily adjust the opening of the blades in response to the situation on the downstream side of the wind direction.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to significantly reduce costs with a simple configuration, and to directly adjust and fix the opening of the blade to any desired opening. The purpose of the present invention is to provide an improved air volume adjustment damper.

Structure of the invention (1) Means for solving the problem In order to achieve the above purpose, the present invention
A thin plate 14 is fixed to the inner wall of the frame 12 so as to be substantially orthogonal to the ventilation hole F, and a continuous slit cut 16 is provided in the thin plate 14 approximately along the circumference of the inner wall of the frame 12, and this slit cut 16 has at least one discontinuous slit. The damper blade 18 has a section 30, and the surface defined and surrounded by the slit cut 16 is the damper blade 18, which is connected to the end of the slit cut 16 and extends from the slit discontinuity section 30 to form an elongated damper blade 18. An escape slit 32 is provided to form a connecting portion 34, the elongated connecting portion 34 is used as the supporting shaft 20 of the damper blade 18, a shaft hole 24 is bored in the side surface of the frame 12, and one end is formed in the thin plate 14. is fixed, and the other end is connected to the support shaft 20.
A rotating rod 26 is provided extending in the direction of the extension line and penetrating the shaft hole 24, and by rotating the rotating rod 26, the support shaft 20 is twisted and rotated, and the damper blade 18 is rotated. It consists of an air volume adjustment damper 10 that opens and closes.

(2) Function The present invention involves fixing a thin plate to the inner wall of the frame approximately perpendicular to the ventilation hole, making slits in this thin plate to form damper blades and a support shaft, and furthermore, attaching a rotatable member to this support shaft. Since the rod is fixed and passed through the hole provided in the frame, by rotating the rotary rod from the outside, the support shaft is twisted and rotated, and the damper blades are opened and closed. At this time, the degree of opening of the blade is confirmed by the inclination of the handle portion of the rotating rod 26.

In such a mechanism, the present invention allows the damper outer frame and the blades to be integrally formed using a single thin plate.

(3) Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic overall perspective view of an air volume adjustment damper 10 according to the present invention. As shown in the figure, the air volume adjustment damper 10 includes a frame 1 as a cylindrical duct.
A thin plate 14 is provided between the two, a slit cut 16 is carved in this thin plate 14 to form a damper blade 18, a support shaft 20, and a damper outer frame 22, and one end is fixed to this thin plate 14, A rotating rod 26 is provided with the other end passing through a shaft hole 24 provided in the frame 12.

The thin plate 14 is made of a steel plate or the like, and as shown in FIG.
The protrusion 27 connected to the thin plate 14 is penetrated therein, and the bracket 29 is fixed to the upper and lower surfaces of the thin plate 14 so as to be fixed substantially orthogonally to the ventilation opening F. A seal (not shown) is applied to the connection part with the inner wall to make it airtight. The thin plate 14 is provided with a continuous slit cut 16 substantially along the circumference of the inner wall of the frame 12. This slit cut 16 has one slit discontinuous portion 30, and the surface defined and surrounded by this slit cut 16 is used as the damper blade 18. Also, an escape slit 3 is connected to the end of the slit notch 16.
2 are engraved in the radial direction. An elongated connecting portion 34 is formed extending from the slit discontinuous portion 30. This elongated connecting portion 34 serves as the support shaft 20 of the damper blade 18. Here, the outer side of the damper, the rotation axis of the damper blade, etc. are formed from one thin plate 14, and moreover, they are integrally formed from one thin plate. Therefore, the slits are formed in the thin plate 14 before it is assembled into the frame 12, and any processing method such as press molding, laser processing, or plasma processing can be used.
After this processing, surface treatments such as galvanizing are performed.

Therefore, the damper frame itself is not a box, but is formed from a single thin plate together with the blades, resulting in a dramatic reduction in material costs. In addition, mass production and automation are possible, and work costs are dramatically reduced. Furthermore, since there is no protruding part on the blade shaft, there is no pressure loss, and the air volume can be adjusted efficiently.

In addition, due to torsional rotation due to plastic deformation of the material,
It is fixed with the opening adjusted.

Furthermore, since the blades and the outer frame are integrally fixed, there is no noise such as rattling at the blade bearings.
In addition, even if the support shaft becomes rusty, the blades can be rotated and adjusted.

A shaft hole 24 is bored in the side surface of the frame 12, and one end is fixed to the thin plate 14 with a screw, and the other end extends in the direction of the extension of the support shaft 20. An L-shaped rotating rod 26 is provided that protrudes from the shaft hole 24. At this time, as shown in FIG.
On the other hand, the rotary rod 26 is wound around the blade in the same circumferential direction so as to sandwich it, and the rotary rod 26 is fixed at the axial center position of the blade. The protruding end of the rotating rod 26 may be in the form of a circular handle.

Here, by rotating the protruding end of the rotation rod 26, the support shaft 20 is twisted and rotated, and the damper blade 18 is opened and closed.

The reason why the support shaft 20 does not break even when the support shaft 20 is twisted and rotated is because the elongated connecting portion 34 is formed and the material is plastically deformed to perform the twisting and rotation operation.In this embodiment, the relief slit 32 is Although it is formed only in the centripetal direction, it may be formed in the centrifugal direction, and any structure may be used as long as it forms the elongated connecting portion 34 and can withstand twisting and rotation operations. In this example, it has been experimentally proven that the support shaft does not break even after approximately 200 rotations. Therefore, once the opening of the blades is adjusted once, such as in an air volume adjusting damper used in a duct system, the damper has sufficient durability as a damper that is not frequently adjusted thereafter.

This eliminates the need for a worm gear mechanism, and also allows for delicate blade openings that cannot be adjusted by these mechanisms.

When disposing such an air volume adjustment damper 10 in the middle of the duct, as described above, before assembling the thin plate 14 into the frame 12, the slit cut 16 is formed by any suitable method such as press molding, laser processing, plasma processing, etc. It is engraved using the following processing method. After this processing, galvanizing etc. are applied. Further, as shown in FIG. 5, a slit 35 is cut approximately halfway around the frame 12, and the protrusion 27 is inserted therethrough to fix the bracket 29. Thereafter, the damper structure as described above is obtained by covering and fixing the peripheral cover 38 having holes 36 formed therein.

The operator can directly adjust the blade to an arbitrary opening degree by rotating the protruding end of the rotating rod 26 from the outside without requiring an external drive mechanism.

The damper can be assembled by simply providing the shaft hole 24 in the frame 12. For example, insert the thin plate 14 from the open side of the duct and insert the rotating rod into the shaft hole 2.
4 should be penetrated.

Further, as shown by the one-dot chain line in FIG. 1, a confirmation window for confirming the opening degree of the damper blades may be provided in the duct wall near the air volume adjustment damper.

Effects of the invention As explained above, according to the air volume adjustment damper according to the invention, a thin plate is provided in the frame, and the thin plate 14 is provided with a thin plate in the frame.
A slit 16 is carved in the damper blade 18.
The supporting shaft 20 and the damper outer frame 22 are formed, one end is fixed to a predetermined part of this thin plate 14, and the other end is fixed to the frame 12.
The rotary rod 26 is provided through the hole 24 provided in the blade, which simplifies the structure, significantly reduces costs, and has the effect that the opening degree of the blade can be directly adjusted and fixed to any desired opening degree. .

[Brief explanation of the drawing]

1 to 5 are diagrams showing embodiments of the present invention. FIG. 1 is an overall schematic perspective view of an air volume adjustment damper, and FIG. 2 is an explanation of the damper as seen from the direction of the ventilation opening. 3 is a cross-sectional view taken along the same line, FIG. 4 is a cross-sectional view taken along the line '-', and FIG. 5 is an explanatory diagram of the assembled state of the damper. F...Ventilator, 10...Air volume adjustment damper, 1
2... Frame, 14... Thin plate, 16... Slit cut, 18... Damper blade, 20... Support shaft, 24
...Shaft hole, 26 ... Rotating rod, 28 ... Confirmation window, 3
0...Slit discontinuous part, 32...Escape slit, 34...Elongated connection part.

Claims (1)

[Scope of utility model registration request] A thin plate is fixed to the inner wall of the frame approximately perpendicular to the ventilation hole,
A continuous slit cut is provided in this thin plate approximately along the periphery of the inner wall of the frame, and the slit cut has at least one slit discontinuity, and the surface defined and surrounded by the slit cut is formed into a damper blade. and an escape slit is provided to connect to the end of the slit cut and extend from the slit discontinuity part to form an elongated connection part, and the elongate connection part is used as a support shaft of the damper blade, A shaft hole is bored in the side surface of the frame, and a rotation rod is provided, one end of which is fixed to the thin plate, the other end of which extends in the direction of the extension of the support shaft and passes through the shaft hole. An air volume adjusting damper characterized in that the support shaft is twisted and rotated by rotating a rod to open and close damper blades.