JP2969348B1 - Damper used for air conveying duct - Google Patents

Abstract

An object of the present invention is to provide a damper that is small and easy to install. SOLUTION: A flange 1 attached to flange portions A1, A1 of ducts A, A, an annular bearing portion 2 connected to an inner peripheral edge of the flange 1, and a shaft 4 projecting from both ends to the bearing portion 2 are provided. A duct B is formed by the supported damper blades 3 and operating means 5 for operating the damper blades 3 from outside, and the width of the bearing 2 is made slightly wider than the diameter of the shaft 4. Through the bearing portion 2 to communicate with the damper blade 3 or connect the flange 1 of the duct B to the damper blade 3
The outer peripheral portion 1b, which is slightly wider than the outer diameter of the shaft 4 at both ends, and the overlapping portions 1c provided at both ends of the outer peripheral portion 1b, and the shafts 4 at both ends of the damper blade 3 are attached to the outer peripheral portion 1b of the flange 1. And the operating means 5 is connected to the damper blade 3 through the outer peripheral portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper used for a duct for conveying air, such as a duct connecting an air conditioner and a room for air conditioning.

[0002]

Conventionally, the damper and fire damper for adjusting the air volume used in this type duct constitutes attach the damper blade Y in the casing X of the duct shape as shown in FIG. 15.

[0003]

Therefore, the size of the damper is large, it is cumbersome to carry and store, and furthermore, both ends of the casing X need flanges Z for connection to ducts. Each of the dampers is fastened and fixed to the duct with bolts and nuts, so that there are two connection points, and it is necessary to take measures against air leakage at each joint surface, and the work of mounting the dampers is troublesome. There is a defect. An object of the present invention is to provide a damper free of such a problem.

[0004]

According to the present invention, in order to achieve the above object, a damper used for a pneumatic conveying duct according to claim 1 is provided with a damper attached between the ducts.
A plate-shaped flange flange portion comprises a heavy Naru surface on both sides was, projecting from the inner circumferential edge of the flange on one side of the flange
An annular frame that, a damper blade which is axially supported by frame body in the axial projecting from both ends, constituted by an operating means for operating the damper blade, the frame body, the width of the damper blade With an outside diameter that is slightly wider than the diameter of the shaft and can be inserted into the duct
That it is, just focusing wear across the flange of the damper between the flanges of the duct is attached a damper easily between the duct.

According to a second aspect of the present invention , there is provided a damper for use in an air conveying duct, wherein a damper attached between the ducts is provided in the duct .
Annular flange including a flange portion Naru heavy surface on both sides
And a damper blade supported by shafts protruding from both ends in the flange , and operating means for operating the damper blade,
Since the flange is formed of a square pipe having an outer peripheral portion slightly wider than the outer diameter of the shaft at both ends of the damper blade, the damper can be formed simply by sandwiching the frame body between the flange portions of the duct. Can be easily installed between ducts. Moreover, since the operating means is connected to the damper through the outer peripheral portion of the flange,
It does not hinder the operation means when the flange of the damper is sandwiched between the flange portions of the duct and connected.

According to a third aspect of the present invention, there is provided a damper used for the air conveying duct according to the second aspect, wherein the annular flange is formed of a rectangular pipe and the square pipe is formed of an L pipe.
A corner fitting constructed bent in shape, the corner fittings
By configuring with a rod-shaped connection fitting consisting of a square pipe to be inserted into both ends , just by changing the length of the rod-shaped connection fitting,
It is possible to obtain a damper having flanges having different widths and heights.

According to a fourth aspect of the present invention, there is provided a damper used for the air conveying duct according to the second aspect.
In the above, the annular flange is provided with a corner fitting,
Rod-shaped connection consisting of square pipes that insert the metal fittings at both ends
And metal fittings.
And short pieces that are inserted into each part.
After inserting both ends of the metal fittings, screw both short pieces
By tightening and fixing together with the rod-shaped connection fitting , the rod
Just by changing the length of the connection
Flanges and corner metal fittings
Split, making the state before assembly more compact
I do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIG.
4 to FIG. 4 will be described. B denotes a damper attached between the front and rear ducts A, A;
As shown in FIG. 2, the flanges A1,
A surface A1 overlaps the plate-like flange 1 provided on both sides, a frame body 2 of the annular continuous to the inner peripheral edge of the flange 1, the frame 2
A damper blade 3 which is pivotally supported by a shaft 4 (about 6mm) projecting from both ends, said damper blade 3 is constituted by the operation means 5 for operating the externally the width of the frame body 2 of the shaft 4 in diameter more and slightly wider (about 12 mm), the operating unit 5 is contacted to the damper blade 3 through the frame 2.

More specifically, the damper B comprises a rectangular flange 1 formed by bending an angled metal material into a rectangular shape, and welding the ends thereof, and a flange 1 from the inner peripheral edge of the flange 1. forming a frame body 2 of the annular projecting side, the frame
Two damper blades 3 and 3 were attached to the body 2 by being supported by shafts 4 protruding from both ends thereof.

The operating means 5 comprises a fan-shaped metal fitting 6 integrally attached to the shaft 4 of one damper blade 3 and a loop-shaped wire 7 connected to the metal fitting 6. A part of the wire 7 is guided by the guide pins 6a, 6a to follow the arc surface of the fan-shaped metal fitting 6, and is connected to the arc surface and connected to the upper end of one side of the frame 2. Opening of the damper blade 3 is performed by guiding the wire 7 to the outside of the flange 1 through wire guides 8, 8 formed of small diameter pipes provided at the lower end of the side and bending the wire 7 in the vertical direction in the drawing. The angle can be adjusted.

Reference numeral 9 denotes a tightening screw provided on one of the wire guides 8, and by tightening the screw 9, the wire 7 inserted into the guide 8 is fixed in the guide 8, and the dampers B, B
Was maintained at a predetermined opening angle. In addition, 10
Indicates a mark provided on the wire 7 facing the outside of the ducts A, A, and the opening angle of the damper blade 3 can be confirmed from the scale (not shown) provided on the outer surface of the flange 1 and the position of the mark.
The damper blades 3, 3 are connected by a connecting rod 11, and when the wire 7 is operated to adjust the opening angle of one damper blade 3,
The other damper blade 3 also follows this so that the opening angle is adjusted.

Reference numeral 12 denotes a packing interposed between both sides of the flange 1 and the flange portions A1, A1 when the flange 1 is sandwiched between the flange portions A1, A1 of the ducts A, A. .

In the drawing, the flange portions A1,
The flange 1 sandwiched between A1 and the flange 1 is integrally fastened with a bolt and a nut. A clip (not shown) is used to integrally clamp the flange 1 sandwiched between the flange portions A1 and A1 from the outer periphery thereof. The mounting may be further simplified as compared with a method using bolts and nuts.

FIG. 1 shows the shaft 4 of the damper blade 3.
The linear motion of the wire 7 is changed to the pivotal motion of the shaft 4 by the fan-shaped metal fitting 6 integrally attached to the shaft. However, the metal fitting 6 is not limited to this. It is needless to say that it can be replaced with a member having the same function as that of the metal fitting 6.

When the flange 1 is mounted on the duct A, it is necessary to support the flange 1 so as to overlap the flange A1 of the duct A. Therefore, hook-shaped hooks 1a, 1a are provided on the upper surface of the flange 1, and the hooks 1a, 1a lock the damper B to one duct A, and then the flange A1 of the duct A on the other side is attached. By overlapping with the flange 1 of the damper B and tightening it with a bolt and nut, the damper B can be easily attached to the duct A.

The embodiment shown in FIG. 5 and FIG.
A flange 1 overlapping between the flange portions A1, A1 of the two ducts A, and an annular frame 2 connected to the inner peripheral edge of the flange 1.
A damper blade 3 supported on the frame 2 by shafts 4 protruding from both ends; and operating means 5 for operating the damper blade 3 from outside
The configuration in which the width of the frame 2 is slightly wider than the diameter of the shaft 4 and the operating means 5 is inserted through the frame to communicate with the damper blade 3 is the same as in the above-described embodiment. There is no particular change. In this embodiment, the operating means 5 is constituted by a leaf spring 13 made of steel or the like having a thickness of, for example, 0.3 mm, and one end of the leaf spring 13 is connected to one damper blade 3 by a pivot or other means. At the same time, the opening end of the damper blade 3 can be adjusted by inserting the other end of the leaf spring 13 into the slit hole 14 provided in the frame 2 so as to protrude to the outside, and pushing and pulling the outer end of the leaf spring 13. . The leaf spring 13 is provided with a number of small holes 13a along its length direction, and is provided with a projecting piece 15 protruding outward from the flange 1, and a small hole (not shown) provided in the projecting piece 15 is provided. ) And the small hole 1 provided in the leaf spring 5
By fixing the leaf spring 13 to the protruding piece 15 by a connecting means 16 consisting of a bolt inserted into one of the bolts 3a and a nut applied to the bolt, the damper blade 3 is maintained at a predetermined adjusted opening angle. I made it.

FIGS. 7 to 9 show still another embodiment, in which a damper B attached between ducts A, A is provided with a flange overlapping between the flange portions A1, A1 of both ducts A, A. 1, a damper blade 3 pivotally supported by shafts 4 projecting from both ends into the flange 1, and operating means 5 for operating the damper blade 3.
And an outer peripheral portion 1b slightly wider than the outer diameter of the shaft 4 at both ends of the shaft 4 and flange portions A1 of the duct A provided at both ends of the outer peripheral portion 1b.
Polymerization surface 1c overlapping in A1, and a 1c, the tube
A damper blade 3 is supported on an outer peripheral portion 1b of the body by shafts 4 at both ends thereof, and the operating means 5 is connected to the damper blade 3 through the outer peripheral portion 1b. Explaining this with specific numerical values, a square flange 1 having a side slightly larger than the diameter of the shaft 4 (about 6 mm), for example, a square pipe having a side of 12 mm, and having a width of about 550 mm and a length of 360 mm is formed. In the flange 1, two damper blades 3 are pivotally supported by shafts 4 at both ends, and one shaft 4 of the one damper blade 3 is supported.
Is projected outward from the outer peripheral surface 1b, and the opening of the damper blade 3 is adjusted by the operating means 5 on the shaft 4.
The operating means 5 is a support piece 1 provided outside the flange 1.
7 and a plate piece 18 which is inserted into the plate piece 18 and protrudes out of the flange 1 and is integrally attached to the tip of a shaft 4 and has five holes over a range of 90 degrees along the circumferential direction. It comprises a disk 19 provided with a plate 19a and a pin 20 supported by the plate piece 18. The pin 20 is slidably supported on the plate piece 18 and attached to the hole 19a side by a spring 21. Inspire.

In this embodiment, the two damper blades 3 are connected to each other by a parallel link mechanism 22 formed between the flange 1, the damper blade 3 and the connecting rod, so that the degree of opening of one damper blade 3 is increased. Accordingly, the other damper blade 3 is opened.

In the above embodiment, the operating means 5
Although the opening angle of the damper blade 3 is adjusted, as shown in FIGS. 11 and 12, the damper blade 3 is closed when the temperature of the air blown in the duct rises abnormally. May be. Explaining this, the damper B includes a shaft 4 that projects the damper blades 3, 3 from both ends thereof into a flange 1 composed of an outer peripheral portion 1b and overlapping portions 1c, 1c, similarly to FIGS. 6 to 8 described above. There is no particular difference from the previous embodiment in that it is mounted so as to be pivotally supported. In this embodiment, the operating means 5 is provided with a thermal fuse 23 that blows at a constant temperature, and the damper blades 3 are closed when the thermal fuse 23 blows. To explain this, the support piece 24 is provided on the outer surface of the flange 1.
And the shaft 4 of one damper blade 3 penetrates the outer peripheral portion 1b and the support piece 24 to protrude to the outer surface of the support piece 24, and is fixed on the shaft 4 to attach the lever 25, and Axis 4
A spring 26 for urging the damper blade 3 toward the closing side is attached to the support member 24, and a pin 27 for supporting the lever 24 in the support piece 24 and locking the lever 25 is provided. The pin 27 is a coil spring 28 surrounding the same. The coil spring 28 is urged in a direction of immersion from the outer surface of the support piece 24, and
The tip of the pin 27 is kept in a state of protruding from the outer surface of the support piece 24 against the above. When hiding, usually,
The pin 27 protrudes from the outer surface of the support piece 24, locks the lever 25, and keeps the damper blade 3 open. However, duct A
When the temperature inside the housing rises abnormally and the thermal fuse 23 blows, the pin 27 is urged by the coil spring 28 to
Immerse from the outside surface of the. Therefore, lever 2 at pin 27
5 is released, and the damper blade 3 is urged by the spring 26 to close.

In the above-described embodiment, the flanges 1 are all formed as annular one-pieces. However, the width and the vertical width of the duct A are various, and accordingly, the size of the flange portion A1 of the duct A is large. Providing a damper having a large number of flanges 1 of different sizes according to the large width and the vertical width makes inventory management and the like difficult. Therefore, the annular flange 1 is constituted by the corner fittings 1a and the bar-shaped connecting fittings 1b connecting the corner fittings 1a, 1a, and by combining these, the flange 1 having a desired size can be easily obtained. This is shown in FIGS.
FIG. 13 shows the structure used in the embodiment shown in FIG.
FIG. 14 will be described. The corner fitting 1a is formed by bending a steel plate and having connection portions 1a-1 and 1a-1 each having a rectangular cross section and projecting in two directions at right angles.
The rod-shaped connection fitting 1b is formed of a square pipe having an inner size of a size into which the connection part 1a-1 is fitted, and as shown in FIG. It is assembled to the flange 1 shown in FIG. 13 using the corner fitting 1a. In addition, each corner fitting 1a and the bar-shaped connection fitting 1b are fastened and fixed with screws 1c. In this embodiment,
When the end of one bar-shaped connection fitting 1b is fitted into the connection 1a-1, it comes into contact with the connection 1a-1. Therefore, the end of the rod-shaped connection fitting 1b is cut off to solve such a problem. The one shown in FIG.
Another embodiment in which a flange 1 having a desired size is obtained by combining a corner fitting 1a and a rod-shaped connecting fitting 1b that connects the corner fitting 1a to each other. To explain this, in this embodiment, the corner fitting 1a
Is a box-shaped short piece 1 constructed by bending a steel plate.
d, 1d ', and the rod-shaped connection fitting 1b is
a short pipe 1d is inserted into both ends of each of the bar-shaped connection fittings 1b and 1b constituting the opposite sides of the flange 1 respectively. And fixed with screws 1c.
After fastening the other short piece 1d 'to each short piece 1d inserted in b with screws 1c so as to project at right angles thereto,
After fitting both ends of the rod-shaped connection fitting 1b constituting the other opposite side of the flange 1 to each short piece 1d ', screws 1c are used.
The short piece 1d 'and the rod-shaped connection fitting 1b are tightened to form a flange 1
Assemble to In addition, each corner fitting 1a and the bar-shaped connection fitting 1b are fastened and fixed with screws 1c. In FIGS. 13, 14 and 15, reference numeral 1f designates a hole through which the bolt is passed when the flange 1 is fastened between the flange portions A1 and A1 with bolts.

In the above-described embodiment, the damper B connected to the duct A having a rectangular cross section has been described. However, the flange 1 of the damper B has a circular shape, so that the damper B is connected to the duct A having a circular cross section. And a damper B that can be used.

[0022]

According to the first aspect of the present invention, the damper can be formed to be extremely flat, and when storing and transporting, the inventory management and transport can be performed easily without taking up space. The damper can be easily attached between the ducts by simply connecting the flanges between the flanges, and the flanges provided at both ends of the damper as in the conventional example, and the duct flanges facing both sides As compared with the case of fastening and binding, the number of attachment work places is reduced and the work can be simplified. According to the second aspect of the present invention, the damper can be formed to be extremely flat, not only having the same effect as the first aspect of the invention, but also operating through the outer peripheral portion of the flange. By connecting the means to the damper blade, there is an advantage that the operating means does not hinder the mounting of the damper between the ducts. In particular, according to the third and fourth aspects of the invention, the damper can be formed flat, inventory management and transportation can be simplified, and the width and height can be changed simply by changing the length of the rod-shaped fitting. It is possible to obtain flanges having different sizes, and to supply a flange having a size as required at any time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a perspective view showing a state where the damper of FIG. 1 is attached to a duct;

FIG. 4 is a front view of a part of FIG. 1;

FIG. 5 is a perspective view showing another embodiment.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is an oblique view with a part of another embodiment removed.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is a side view showing still another embodiment.

FIG. 11 is an enlarged view of the line CC

FIG. 12 is an enlarged perspective view showing a modification of the flange shown in FIG. 5;

13 is a perspective view of the state before assembly in FIG. 12 ;

14 is an enlarged perspective view of a state before assembling showing another modification of the flange shown in FIG. 5;

FIG. 15 is a perspective view showing a conventional damper.

[Description of Signs] A Duct B Damper
DESCRIPTION OF SYMBOLS 1 Flange 2 Frame 3 Damper wing 4
Shaft 5 Operating means 6 Support bracket

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-137996 (JP, A) JP-A 64-45239 (JP, U) JP-A-1-131932 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) F24F 13/14

Claims (4)

(57) [Claims] 1. A damper attached between ducts is attached to the duct.
Butt flange portion Naru heavy surface provided with plate-shaped hula <br/> Nji provided on both sides, on one side of the flange from the inner peripheral edge of the flange
An annular frame for output, a damper blade which is <br/> axially supported on the frame body in the axial projecting from both ends, constituted by an operating means for operating the damper blade, the frame, the the outer diameter width obtained insert and into the duct at a slightly wider than the diameter of the shaft of the damper blade
A damper used for a pneumatic conveying duct, comprising: 2. A damper to be attached between the ducts is provided on the duct .
Annular hula flange portion provided comprises a heavy Naru surface on both sides
Constituted by the Nji, a damper blade which is pivotally supported by a shaft projecting from both ends in the flange, and operating means for operating the damper blade, the flange is slightly than the outer diameter of both ends of the shaft of the damper blade A damper used for a pneumatic conveying duct , comprising a square pipe having a wide outer peripheral portion. 3. The annular flange is formed as an L-shaped square pipe.
A corner fitting constructed by bending the mold, the corner fitting both
3. A damper for use in a pneumatic conveying duct according to claim 2, wherein said damper comprises a rod-shaped connection fitting made of a square pipe inserted into an end portion . 4. An annular flange comprising : a corner fitting;
A rod made of a square pipe for inserting the corner fitting into both ends
And metal fittings, and corner fittings are rod-shaped fittings.
Consist of short pieces inserted at both ends, and stick both short pieces
After inserting both ends of the metal fittings, short both ends with screws
To secure the piece together with the rod-shaped fitting.
3. A damper for use in a pneumatic conveying duct according to claim 2 .