JP2723032B2 - Square sound deadening box for air conditioning duct and method of assembling the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular sound-absorbing box used for an outlet or a bending portion of an air-conditioning duct provided in a building.

[0002]

2. Description of the Related Art A typical example of a rectangular sound deadening box is an anemo box shown in FIG.
The line box shown in FIG. Conventionally, these silencers are suspended from the ceiling etc. with a hollow box body with glass wool of almost constant thickness attached to the inside of the outer plate and connected to the air conditioning duct, and receive the airflow from the inlet and discharge it from the outlet. It is used for air-conditioning members that change the direction of cold or warm air and blow it out to residential areas. This configuration satisfies the required functions such as sound absorption, heat insulation and non-combustibility, and is one of the indispensable devices for the interior of high-rise buildings.

The typical shape of a conventional rectangular silencer can be well understood in Japanese Patent Application Laid-Open No. Hei 2-309093 shown in FIG. The figure shows an example of a sound-absorbing elbow, which is an improved version of a frame 101 used for connection to front and rear air conditioning ducts (not shown). That is, the box body is made of a steel plate outer plate 10.
2 and a glass wool 103 of an indefinite shape, which is internally provided with a certain thickness. The gist is that a frame body is screwed and attached to the front and rear connecting portions of this box body. Compared to the use of studs, washers, and corner members for assembling the inner frame, which are often used to fix the muffler, the muffler can be easily assembled.

However, recently, a technique for providing a molded glass wool plate in place of irregular glass wool has been developed, and the problem of the prior art, which is difficult to handle at the time of assembling and has poor workability, has been greatly improved. In this case, since the glass wool molded plate itself has strength enough to withstand handling during transportation and installation work, the outer plate required for the silencer is not necessarily indispensable, for example, omitting the outer plate Instead, as a reinforcement to maintain the shape of the entire rectangular box, a configuration in which a steel reinforcing angle is applied to each corner of the box and a glass wool molded plate is sandwiched from inside and outside and held It has become possible and is now being implemented. FIG. 8 schematically shows an example of a conventional silencer assembly. First, a square frame is assembled with screws using a steel angle to form the top and bottom of a rectangular box. Or, it is formed by spot welding. Next, as shown in the figure, four inner frame members 104 and four outer frame members 105 forming ridge lines corresponding to the respective corners of the square are set up at the four corners of the bottom frame member with the thickness of the glass wool molded plate therebetween, and are screwed or Fix by welding.
The glass wool molding plate is fitted into the bottom frame to form the bottom surface of the box, and the glass wool molding plate is slid between the standing inner and outer frame members to form four side surfaces. The top frame is placed on the opening surface and fixed by screws, welding, etc., and a glass wool molded plate is inserted into the frame to complete a box-shaped silencer.

[0005]

A comparison between the prior art shown in FIG. 7 and the prior art shown in FIG. 8 shows that the latter can omit a steel outer plate for forming the outer surface of the box, and The advantage is that labor can be saved as much as there is no need to use wires, screws, screw bolts, etc. to attach irregular glass wool to the plate at a constant thickness. However, despite the fact that glass wool is used as a molded plate, it has been improved to a fixed shape that can be easily transported and attached from the conventional difficult handling of irregular shapes, but the steel frame for reinforcement before and after attachment The fact that the need to bear a large number of man-hours and costs for the production remains as it is is a major issue that needs to be strongly improved in terms of the manufacturing site. Spot welding and tightening of a large number of screws are complicated processes that cannot be ignored in modern high-rise buildings with many muffler boxes.

It has been emphasized that the glass wool molded plate has a strength that does not hinder conveyance and assembly.
When assembled into a box at the factory and sent to the site for actual installation work, handling cannot always be guaranteed to be careful, so there is still the disadvantage that the molding surface is easily damaged if the molding surface is exposed. In order to prevent this, an aluminum foil 106 is attached to the outer surface of the glass wool molded plate as shown in FIG. 8 to protect the outer surface. However, it must be said that the advantages associated with the conventional glass wool molding are lost.

In order to solve the above-mentioned problems, the present invention provides a novel air-conditioning air-conditioning duct that can be completely assembled with almost one touch without using any screws and without any welding work. The purpose is to provide boxes and how to assemble them.

[0008]

According to the present invention, a rectangular sound deadening box for an air-conditioning duct according to the present invention is provided with an opening for an inlet at a desired position, a bottom plate and side surfaces formed by bending a thin steel plate and a veneer. An outer frame 1 formed in combination, an inner frame 3 made of a thin steel plate formed by bending a thin steel plate inserted into the outer frame 1 and a glass wool formed plate 2 with the outer frame 1 and the glass wool formed plate 2 interposed therebetween, and a glass wool formed by bending each side of the square plate An upper cover 4 fitted with a molded plate and having an outlet hole in the center, an inlet 5 and an outlet 6 fitted into the opening of the outer frame, and connected to either the inlet or the outlet housed in the inner frame. The above problem has been solved by including the damper 7.

More specifically, a main outer frame 1 is formed by bending a thin steel plate having an inlet hole 11 at least on one side into a U-shape to form two side surfaces 12, 13 and a bottom surface 14.
5 and a side plate 1 that is fitted and clamped between two flanges 16 formed by bending both ends of the two side surfaces of the main outer frame 15 so as to face each other.
7 and side faces 32, 33, each of which has an inlet hole 31 common to at least the outer frame and whose U-shaped side length is smaller by the thickness T of the glass wool molded plate.
And an inner frame 3 formed by bending the bottom surface 34, an upper lid 4 having a flange 43 formed by opening an outlet hole 41 and bending four sides of a top surface 42, and between the outer frame 1 and the inner frame 3, The most preferable configuration is composed of a glass wool molded plate 2 interposed on each surface inside the upper lid 4 and a damper 7 communicated with an inlet 5 and an outlet 6 which are housed in the inner frame and open to the outside of the outer frame.

Further, in this structure, regarding the engagement between the outer frame and the upper lid, square holes 44 are respectively drilled at the four corners of the upper lid flange 43, and the lower side is cut off at a position where the upper edge of the outer frame flange 16 is aligned to form a square. The combination of the shapes in which the engaging projections 18 are provided is good.

In addition, the side surfaces 32, 33 of the inner frame 3 are additionally provided.
It is also preferable that a hole 35 besides the inlet hole 31 is formed in the bottom surface 34 in addition to the inlet hole 31.

As a method for assembling the air conditioning duct according to the present invention, the main outer frame 15 formed by bending a thin steel plate into a U-shaped cross section is used.
The side plate 17 is inserted between the flanges 16 which are further bent at two opposite side ends of the outer frame 1 to form the outer frame 1, the glass wool molded plate 2 A with a hole is inserted into the side surface 12 where the inlet hole 11 is opened, and the bottom surface 14 is formed. The glass wool molded plate 2 is attached to each of the other side surfaces, and the inlet holes 31 of the inner frame 3 formed by bending a thin steel plate into a U-shaped cross section are aligned and fitted onto the glass wool molded plate. The glass wool molded plate 2B integrally formed with the hole 7 is placed on both frames to accommodate the damper 7 therein, and the glass wool molded plate 2B with the hole is formed into a flange 43 formed by bending four sides of the upper lid 4. At the same time, the four corners of the flange 43 and the upper part of the flange 16 of the outer frame are engaged and fixed to each other, and the inlet 5 is fitted into the inlet hole 11 of the outer frame to efficiently achieve the purpose. It can be achieved to.

Alternatively, as another assembling method, the side plates 17 are respectively inserted between the flanges 16 in which the opposite two side ends of the main outer frame 15 in which a thin steel plate is bent in a U-shaped cross section are further bent.
To form the outer frame 1, the glass wool molded plate 2 is attached to the bottom surface 14 and the non-open side surface 13, respectively, and the inlet of the inner frame 3 is formed by bending a thin steel plate into a U-shaped cross section on the glass wool molded plate. The holes 31 are aligned and fitted, and the glass wool molded plate 2A with holes integrally joined with the inlet 5 and the damper 7 is attached to the side surface 12 opening the inlet hole 11 to accommodate the damper 7 therein. The glass wool molded plate 2B with a hole is fitted into a flange 43 formed by bending four sides of the upper lid 4, and the four corners of the flange 43 and the upper part of the outer frame flange 16 are engaged and fixed to each other. The procedure for fitting the outlet 6 into the hole 41 may be replaced with the procedure.

[0014]

The outer frame is formed by bending a thin steel plate, and a glass wool molded plate is attached to the inner surface thereof, and the inner frame having a shorter length on each side by the plate thickness T is attached. There is no portion where the small glass wool molded plate is exposed on the box surface, and the surface can withstand external pressure.

On the other hand, from the viewpoint of the manufacturing procedure, the manual work of welding or screwing iron materials to form the skeleton of the box as in the prior art is completely eliminated, and several types of parts are simply overlapped. Since the operation is only a simple operation of plugging in and all the operations are light operations that can be called one touch, the time and cost required for assembly are extremely reduced. Alternatively, if the circumstances of the other party allow, it is possible to transport each member to the construction site and assemble it using an appropriate vacant land near the site, and there is room to select new work procedures that could not be imagined by conventional technology Is born.

[0016]

1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view after assembly. The assembling of the sound deadening box includes assembling of the main body of the box itself and combination of dampers and the like housed therein. First, in the case of this embodiment, the damper 7 inserts the inner cylinder 71 having alternately opened vent holes on the side and bottom surfaces into the outer cylinder 72, and locks the two into the outlet 6 from above. The glass wool molded plate 2B with holes is covered and assembled integrally. The air volume adjustment is performed by rotating the inner and outer cylinders to increase or decrease the overlapping opening area to a desired ratio. However, the damper in this drawing is merely an example for practical use, and is not the gist of the present invention, but other known general Even if the shape of the damper is simple, there is no problem in practice.

On the other hand, the formation of the main body of the box is the gist of the present invention. The member shown in the lower right corner of the figure is the outer frame 1, which is usually formed by forming a galvanized thin steel sheet into a U-shape by a sheet metal press, and forming a non-perforated side surface 13, a bottom surface 14, and a perforated side surface 12. A flange 16 is formed by further bending both end surfaces of the side surface, and the two flanges are connected by two side plates 17 to form a box shape. The glass wool molded plate 2A with holes is attached to the side surface 12, and the glass wool molded plate 2 is attached to the other side surfaces 13, 17 and the bottom surface 14, and the glass wool is lined in the outer frame 1 with the glass wool.

The inner frame 3 is placed on the attached glass wool molding plate.
Fit. This inner frame is also formed of a galvanized thin steel sheet bent in a U-shape, and the length of each side of the side surfaces 32 and 33 and the bottom surface 34 is longer than the side surface and the bottom surface of the outer frame. Are made shorter by a dimension equal to the plate thickness T of the above, so that the three members of the outer frame, the glass wool molded plate, and the inner frame all form a three-layer composite box closely adhered with almost no gap. In this case, it is not necessary to impose a strong protective action on the inner frame to protect the box from external pressure. Therefore, it is preferable to cut out the hole 35 in addition to the hole 31 for the inlet as appropriate to reduce its own weight.

The upper lid 4 comprises a top surface 42, which is a square plate, and a flange 43 whose four sides are bent at right angles. An outlet hole 41 is opened in the center of the top surface. As described above, the outlet 6 is connected to the outlet hole 41 of the perforated glass wool molded plate 2B in a state where the damper 7 is joined downward.
From the outside, but in this assembled state, they are integrally housed in the inner frame, and the outlet 6 that has penetrated is further covered with the upper lid 4 and pulled out through the outlet hole 41. In this covering stage, the outer frame 1 and the upper lid 4
And the engagement action appears automatically.

FIGS. 3 and 4 show an embodiment of the engaging action. FIG. 3A and FIG. 4B are perspective views of square holes 44A and 44B formed in four corners of the flange 43 of the upper lid. Fig. (B) is a perspective view in which an engaging projection 18 protruding from an upper portion of a flange 16 of the outer frame is engaged with a square hole, and Fig. (C) is a sectional view thereof. Each of the engagement protrusions 18 of the outer frame has its lower side 19 cut off and bulges outward. Therefore, when the bottom side 45 of the upper lid is covered from above, the protrusions are centered on the upper side 20 and inward. When the bottom of the top lid passes and reaches the square hole, the pressing force disappears, and the engaging projections are elastically deformed again to return to the original shape, and the two members are engaged. State. In the embodiment shown in FIG. 4, the engaging projection 46 is also provided at the center of the square hole 44B of the upper lid, so that when it is covered with the crown, it itself performs an elastic deformation, thereby fulfilling the function of further strengthening the engaging action of biting each other.

After the main body of the sound deadening box has been assembled as described above, the inlet 5 is inserted into the inlet hole opening on the side surface of the outer frame, and the entire box is turned upside down to bore the outlet on the ceiling. The system will be inserted into the outlet and blow down cold or warm air, and an air conditioning pipe will be connected to the inlet to build a system that communicates with the air source.

FIG. 5 is an exploded perspective view showing another method of assembling the sound deadening box of the present invention. The assembled product has the same shape as the previous example, but is connected to the damper 7 housed in the inner frame. The difference is that the outlet is an inlet instead of the outlet in the precedent. As shown in the figure, there are some differences in the procedure of assembling, but there is no essential difference, and there is no significant difference in the operation and effects.

[0023]

The procedure of assembling the embodiment of the present invention has been described in detail. However, all of the manufacturing in a factory is a simple operation of assembling standard members according to a manual, and the procedure is almost one-touch. , The quality uniformity is always assured so that even inexperienced and unskilled persons can always obtain a sufficiently reliable product. Also, if circumstances permit, each member can be transported to the site as it is, and it is also possible to adopt a method of assembling at an appropriate location on the site, in which case it is less bulky than assembling and transporting in a box shape This produces an advantageous effect on transportation. Such efficient and labor-saving work and the provision of its products not only contribute to the reduction of construction costs, but also ensure accurate work schedules, improve the safety of on-site work, and improve product reliability. It is highly valued for producing intangible benefits such as increased sex.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing the whole of the same example after assembly.

FIG. 3 is a perspective view (A) and (B) and a sectional view (C) showing a part of the embodiment.

FIG. 4 is a perspective view (A) and (B) and a sectional view (C) showing a part of another embodiment.

FIG. 5 is an exploded perspective view showing another embodiment of the assembling method of the present invention.

6 (A) and 6 (B) are perspective views showing different prior arts.

FIG. 7 is a longitudinal sectional front view showing still another conventional technique.

FIG. 8 is a part of a sectional plan view showing still another conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer frame 2 Glass wool molding plate 3 Inner frame 4 Top lid 5 Inlet 6 Outlet 7 Damper 11 Inlet hole 12 Side 13 Side 14 Bottom 15 Main outer frame 16 Flange 17 Side plate 18 Engagement projection 19 Lower side 31 Inlet hole 32 Side 33 Side 34 Bottom 35 Drill hole 41 Outlet hole 42 Top surface 43 Flange 44 Square hole T Thickness of glass wool molded plate

Claims (6)

(57) [Claims] 1. An inlet hole is opened at a desired position,
An outer frame 1 formed by combining a veneer and a veneer formed of a thin steel plate with a bottom surface and each side bent, and a thin steel plate fitted into the inside thereof with the outer frame 1 and the glass wool molded plate 2 interposed therebetween. An inner frame 3 made of a plate, an upper lid 4 having each side of the square plate bent and fitted with a glass wool molded plate and having an outlet hole opened in the center, and an inlet 5 and an outlet 6 fitted into the opening of the outer frame. And a damper 7 housed in the inner frame and connected to either the inlet or the outlet. 2. A thin steel plate having an inlet hole 11 opened on at least one side thereof is bent into a U-shape to form two side surfaces 12, 13.
Outer frame 15 that forms the upper and lower surfaces 14, and both flanges 1 formed by bending both ends of the two side surfaces of the main outer frame 15 so as to face each other.
An outer frame 1 composed of a side plate 17 fitted and held between
An inner frame 3 formed by bending at least an inlet hole 31 common to the outer frame, and bending the side surfaces 32, 33 and the bottom surface 34, each of which has a U-shaped side whose length is smaller by the thickness T of the glass wool molded plate. And an upper cover 4 having a flange 43 formed by opening an outlet hole 41 and bending four sides of a top surface 42, and interposed between the outer frame 1 and the inner frame 3 and on each surface inside the upper cover 4. And a damper 7 communicating with an inlet 5 and an outlet 6 which are accommodated in the inner frame and open to the outside of the outer frame. 3. The upper lid flange 43 according to claim 1,
Square holes 44 are formed in the four corners of the air-conditioning duct, and engaging projections 18 are formed at the upper positions of the outer frame flanges 16 so as to be aligned with each other, and the lower side 19 is cut off to protrude into a square shape. Silence box. 4. The air conditioning system according to claim 1, wherein a hole 35 is formed in the side surface 32, 33 and / or the bottom surface 34 of the inner frame 3 in addition to the inlet hole 31. Duct square silence box. 5. A flange 16 obtained by further bending opposite ends of two opposite sides of a main outer frame 15 obtained by bending a thin steel plate into a U-shaped cross section.
The outer frame 1 is formed by inserting the side plates 17 therebetween, and the glass wool molded plate 2A with holes is attached to the side surface 12 that opens the inlet hole 11, and the glass wool molded plate 2 is attached to the bottom surface 14 and other side surfaces. An inlet hole 31 of the inner frame 3 formed by bending a thin steel plate into a U-shape in cross section is aligned and fitted onto the glass wool molded plate, and the outlet 6 and the damper 7 are integrally joined to form a glass wool molded plate with holes. 2B is placed on both frames and the damper 7 is housed inside,
The perforated glass wool molded plate 2B is fitted into a flange 43 formed by bending the four sides of the upper lid 4, and the four corners of the flange 43 and the upper side of the outer frame flange 16 are engaged and fixed to each other to form an inlet for the outer frame. A method for assembling a rectangular silencing box for an air conditioning duct, wherein the inlet 5 is fitted into the hole 11. 6. A flange 16 obtained by further bending ends of two opposite sides of a main outer frame 15 obtained by bending a thin steel plate into a U-shaped cross section.
The outer frame 1 is formed by inserting the side plates 17 therebetween, and the glass wool molded plate 2 is attached to the bottom surface 14 and the non-open side surface 13 respectively, and a thin steel plate is bent on the glass wool molded plate in a U-shaped cross section. The inlet hole 31 of the inner frame 3 is aligned and fitted, and the glass wool molded plate 2A with the hole, in which the inlet 5 and the damper 7 are integrally joined, is attached to the side surface 12 opening the inlet hole 11 to the inside. A flange 43 that accommodates the damper 7 and is formed by bending four sides of the upper lid 4.
While fitting the glass wool molded plate 2B with a hole,
A method for assembling a rectangular sound deadening box for an air-conditioning duct, wherein the four corners of the flange 43 and the upper side of the flange 16 of the outer frame are engaged and fixed to each other, and the outlet 6 is fitted into the outlet hole 41 of the upper lid 4. .