JP4568586B2 - Method for forming air conditioning duct - Google Patents

Description

  The present invention relates to a method for forming an air conditioning duct that transports air conditioned (hereinafter, air-conditioned) to a clean room or the like and blows out air-conditioned air to a required place.

  An air-conditioning duct that blows air-conditioned air, such as temperature-adjusted air or purified air, to a predetermined location is provided with air outlets at a plurality of locations where air-conditioned air needs to be supplied. The air outlet forms a blast passage for conditioned air as a part of the duct line and is configured to blow out a part of the conditioned air to be blown to the outside. Therefore, the air outlet is a duct constituting the duct line. Connected between them. The connection between the air outlet and the duct is generally made by providing a flange at the connection end of the air outlet and the duct, abutting between the connections with the flange, and fastening with a screw in a fastening hole opened in the flange. A connecting structure for connecting the ducts is widely used.

  However, duct connection by screws involves at least four screw tightening operations when connecting one location, so the work efficiency is poor, and screw tightening operations at high places and under the floor are difficult, and the work man-hours and labor are large. There was a problem. Moreover, since the air outlets are provided at a plurality of locations on the duct line, if the number of work steps and labor required for connection are large, the work efficiency of air conditioning duct formation is significantly reduced.

  Also, in a clean room that manufactures semiconductors for cell production and electronic parts using nanotechnology such as liquid crystal modules, the layout of the manufacturing equipment and the layout of the partition are frequently changed, and the layout of the air outlet is also changed. A lot is happening. Accordingly, there is a need for a duct forming method that can easily perform the operation of connecting the air outlet to the duct.

As a connecting structure for solving this problem, a flange connecting device is known in which the outer peripheral edge of the flange portion is tightened with a metal band, the connecting ducts are connected by respective flanges, and the connecting parts are sealed with a caulking material (Patent Document 1). reference). As shown in FIG. 6, this flange coupling device has flanges 54, 54 attached to the coupling ends of the ducts 51, 52 to be coupled, and the ducts 51, 52 are abutted so that the flanges 54, 54 come into contact with each other. A metal band 56 is placed so as to sandwich the flanges 54, 54, and after the caulking material 55 is injected into the recessed portion inside the metal band 56, the metal bands 56 are tightened to clamp the flanges 54, 54 from the outer periphery, The flanges 54 and 54 are not separated from each other.
Noto 3083555 (Pages 1 and 2, Fig. 1)

  However, in the connection structure in the above prior art, there is a large degree of dependence on the force of tightening the flange from the outer peripheral edge to the inside, and there is a problem of lack of connection stability. Also, in order to ensure sufficient connection strength, it is necessary to increase the tightening force by the metal band, but in order to cope with the tightening force, it is required to ensure sufficient duct strength, and the duct material It is necessary to increase the thickness and use a material with high strength.

  An object of the present invention is to provide a method for forming an air-conditioning duct that can easily carry out an operation of connecting air outlets that are required to be arranged at a plurality of locations on a duct line between the ducts. It is to provide.

In order to achieve the above object, the present invention provides an air outlet formed in a cylindrical shape having the same diameter as a duct at a required position on a duct line in which a cylindrical duct is constructed to a required length. A method of forming an air conditioning duct configured to connect to each duct to form an air flow path of the duct line and to blow out a part of the air flowing through the duct line from the air outlet to the outside. A joint formed in an annular shape with an inner diameter corresponding to the diameter of the connection end, and a flange extending in the diameter direction from one end of the joint And a folded flange formed by folding the outer peripheral portion of the flange portion to the opposite side of the connecting end at a predetermined angle, the outer surface of the flange portion being at the same position as the connecting edge or outside the connecting edge. To position Joined in sea urchin the joint mating flange portion of the folded flange coupling end of each sides of the duct on either side connecting end of the air outlet is attached so as to abut the sealing member so as to extend over a pair of the folded portions on the the arranged, arranged fastening member formed on the smaller interior angle from the folded angle which the folded portions of both sides forms on the sealing member, wherein the pair of the folded portion of the fastening member so that the diameter is reduced the Rukoto the male clamping mutual fastening in the fastening member through the sealing member, characterized by connecting the air outlet to both sides of the duct.

  According to the above configuration, since the turn-up flange is formed on the turn-up flange joined to the connection end of the air blowout port and the duct connected thereto, the air blow-out port and the duct are brought into contact with each other so that the flange portion comes into contact with each other. Thus, a state in which the folded portions are present in an inverted V shape on both sides of the flange portion is obtained. A fastening member formed at an inner angle smaller than the angle of the inverted V shape formed by the folded-back portions of the folded-back flanges is put on the folded-back portion via the sealing member, and the fastening member is tightened so that the diameter thereof is reduced. Then, the sealing member is compressed and fills the gap between the flange portions abutting to improve the airtightness of the connecting portion. Further, since the folded portion is clamped by the fastening member from both sides by tightening the fastening member, the opposing folded flanges are clamped and the two ducts are stably connected. This connection structure facilitates the operation of connecting the air outlets to the ducts on both sides, and the connection strength is also ensured, so that the efficiency of forming an air conditioning duct configured by providing air outlets at a plurality of locations on the duct line is improved. be able to.

The fastening member is a method for forming an air-conditioning duct according to claim 1, wherein the pair of semicircular bands are connected to each other at one end and the other end is fastened with a binding screw. The member is configured to reduce the diameter of the circular ring formed by the pair of bands by connecting a pair of semicircular bands at one end and fastening the other end with a binding screw. In the above configuration, the sealing member is preferably made of a material that does not cause diffusion or deterioration of chemical substances, for example, a sealing material of butyl rubber or fluorine resin, and the air conditioning duct is cleaned in a clean room. When applied to the supply of air, it is possible to prevent chemical substances generated from the sealing member, exfoliated powder, and the like from causing trouble in the work performed in the clean room.

According to the present invention, the sealing member is disposed on the pair of folded portions so as to straddle the pair of folded portions, and the fastening member formed at an inner angle smaller than the folded angle formed by the folded portions on both sides is sealed. By placing the pair of folded portions on the fastening member and tightening the pair of folded portions with the fastening member via the sealing member so that the diameter of the fastening member is reduced, the sealing member is compressed and the flange portion is contacted. The gap between the contacts is filled to improve the airtightness of the connecting portion. 2. The method of forming an air conditioning duct according to claim 1, wherein the fastening member connects a pair of semicircular bands at one end thereof, and clamps the other end with a binding screw. The fastening member is configured to reduce the diameter of the circular ring formed by the pair of bands by connecting a pair of semicircular bands at one end and fastening the other end with a binding screw. . Moreover, when configuring an air conditioning duct having air outlets at a plurality of locations on the duct line, it is possible to improve the work efficiency of connecting the air outlets between the ducts, and when the number of air outlets is large or the duct line Even when the distance is long, the working time can be shortened, and at the same time, an air conditioning duct structure with high connection strength can be obtained.

  FIG. 1 shows a connection structure between an air outlet 6 and ducts 5a and 5b constituting an air-conditioning duct according to the embodiment, and one of a folded flange 1a and an air outlet 6 joined to a connecting end of the duct 5a. The ducts 5a and 5b and the air outlet 6 are connected to each other by clamping the space between the folded flange 1b joined to the connecting end of the first and second ends with the fastening member 2. Since the other connecting end of the air outlet 6 and the duct 5b are connected in the same manner, an air outlet 6 is interposed between the ducts 5a and 5b to form a duct line of the air conditioning duct, and the temperature and humidity are adjusted. The air flow path of conditioned air that is fresh air and / or purified air is formed as shown by arrows, and a part of the conditioned air blown when passing through the air outlet 6 is made of punching metal or the like. Air-conditioned air can be blown out from a blow-out portion 33 that enters the compartment 32 from an air introduction portion 31 formed by a perforated plate and forms a part of the outer cylinder of the air outlet 6 on the perforated plate. In addition, the air blowing structure in the air blower outlet 6 shown in FIG. 1 is not limited to the illustrated structure, Various blowing structures can be applied.

  As shown in FIG. 2 in a state cut in the diametrical direction, the folded flange 1a is formed in a circular annular shape having an inner diameter corresponding to the diameter of the air outlet 6 formed in a cylindrical shape. As shown in FIGS. 2 and 3, a joint part 13 for joining to the connection end of the air outlet 6 or the duct 5 a, a flange part 11 formed in a diametrical direction from the joint part 13, and the flange part 11 The outer peripheral portion is formed with a folded portion 12 that is folded inward at a predetermined angle, and is joined to the connection end of the air outlet 6 or the duct 5a by the joint portion 13. Joining of the folded flanges 1a, 1b to the air outlet 6 or the connecting end of the duct 5a is such that the outer surface of the flange portion 11 coincides with the connecting end edge or the outer surface of the flange portion 11 is located slightly outside the connecting end edge. To be joined.

  The folding angle of the folded portion 12 from the flange portion 11 can be set in a range of 10 to 45 degrees, but considering the clamping pressure by the fastening member 2 and the workability of the folded flanges 1a and 1b, about 30 degrees. It is a suitable angle to set. The length of the folded portion 12 is preferably 50 to 80% of the length of the flange portion 11.

  Further, since the folded flanges 1a and 1b are joined so as to come into contact with each other at the flange portion 11 between the connections, the turned-up flanges 1a and 1b facing each other at the connected portion are connected to the joint portion 13 and the folded portion 12 with respect to the flange portion 11. It is formed as two types of folded flanges 1a and 1b having symmetrical cross-sectional shapes in which the forming directions are reversed. Moreover, although the state which connects the air blower outlet 6 and duct 5a, 5b is shown here, it cannot be overemphasized that it can comprise similarly when connecting duct 5a, 5b ....

  As shown in FIG. 3, between the duct 5a (or duct 5b) and the air outlet 6 which are brought into contact with each other between the flange portions 11 of the folded flanges 1a and 1b, the folded flanges 1a and 1b are connected. A rubber band (sealing member) 3 is arranged around the folded-back portions 12 and 12 formed in an inverted V shape by contacting them, and the fastening member 2 is put on the rubber band (sealing member). By tightening to reduce the diameter, the duct 5a and the air outlet 6 are connected. The connection between the duct 5b and the air outlet 6 is similarly performed.

  As shown in FIG. 4, the fastening member 2 is a circular shape formed by a pair of bands 2 a and 2 b by connecting a pair of bands 2 a and 2 b at one end and fastening the other end with a binding screw 15. It is configured so that the diameter of the ring can be reduced. The pair of bands 2a and 2b are provided with a connecting portion 21 and a fastening portion 22 at both ends of semicircular arc portions 20a and 20b. As shown in FIG. 3 (b), the arc portions 20a and 20b have an inner angle g smaller than the inverted V-shaped angle f formed by the folded portions 12 and 12 of the pair of folded flanges 1a and 1b that are in contact with each other. It is formed in a semicircular shape having such a cross-sectional shape. The connecting portion 21 is configured so that the hook-like portion 18 joined to one end of the arc portion 20a can be engaged with the engaging portion 17 joined to one end of the other arc portion 20b. 2a and 2b are connected by the connecting part 21, and after covering the pair of folded flanges 1a and 1b, the fastening part 22 is tightened so that the circular diameter formed by the pair of bands 2a and 2b is reduced. The fastening portion 22 has a binding screw 15 passed from a screw holding portion 23 joined to the other end of one arc portion 20a fixed to a nut holding portion 24 joined to the other end of the other arc portion 20b. The diameter formed by the pair of bands 2a and 2b can be reduced by screwing into the nut 25.

  As shown in FIG. 5 (a), the structure in which the pair of bands 2a and 2b are connected to reduce the diameter is connected to one end of each of the pair of bands 2a and 2b by a hinge 19, and the fastening portion 22 is connected to the other end. It can be provided and configured. Moreover, as shown in FIG.5 (b), a pair of bands 2a and 2b can also be comprised so that the fastening parts 22 and 22 may be fastened by each one end side and other end side.

  As shown in FIG. 3, when the pair of folded flanges 1a and 1b are tightened with the fastening member 2 through the sealing member 3 such as a rubber band, the inner angle g is smaller than the angle f formed by the folded portions 12 and 12. Since the fastening member 2 clamps between the folded portions 12 and 12, the sealing member 3 is compressed to fill a gap between the folded flanges 1a and 1b to improve the sealing performance between the connections, and the air duct. As a result, air leakage can be prevented. In addition, the pair of folded flanges 1a and 1b are pinched between the folded portions 12 and 12 and are uniformly pressurized from the entire circumference in the diametrical direction, so the gap between the duct 5a and the air outlet 6 is strong. Connected.

  The sealing member 3 interposed between the folded flanges 1a, 1b and the fastening member 2 is preferably butyl rubber as the material. Butyl rubber has not only low gas permeability but high sealing performance, but also excellent weather resistance, heat resistance, acid resistance, and alkali resistance. Therefore, even when the air conditioning duct is configured as a blower duct to a clean room, chemical substances and exfoliated powder are not mixed into the cleaned air.

As described above, according to the present invention, the sealing member is disposed on the pair of folded portions so as to straddle the pair of folded portions, and is formed at an inner angle smaller than the folded angle formed by the folded portions on both sides. A fastening member is disposed on the sealing member, and the pair of folded portions are clamped with the fastening member via the sealing member so that the diameter of the fastening member is reduced, thereby sealing each other. The member is compressed and fills a gap between the flange portions contacting each other, thereby improving the airtightness of the connecting portion. The fastening member is a method for forming an air-conditioning duct according to claim 1, wherein the pair of semicircular bands are connected to each other at one end and the other end is fastened with a binding screw. The member is configured to reduce the diameter of the circular ring formed by the pair of bands by connecting a pair of semicircular bands at one end and fastening the other end with a binding screw. Moreover, since the work efficiency of connecting the air outlet and the duct in the air conditioning duct that forms the duct line by interposing a plurality of air outlets between the ducts can be improved, the longer the extension distance of the duct becomes, Further, even when the number of air outlets is large, efficient connection work can be performed. In addition, since the connection structure maintains the airtightness and does not generate chemical substances or the like, the connection portion is suitable as an air conditioning duct for supplying purified air to a clean room.

The fragmentary sectional view which shows the connection structure of the air-conditioning duct which concerns on embodiment. The perspective view which shows the structure of a return | turnback flange. (A) which shows the connection structure by a folding | returning flange is sectional drawing, (b) is explanatory drawing of a folding angle. The perspective view which shows the structure of a fastening member. The schematic diagram which shows another aspect of a fastening member. The fragmentary sectional view which shows the structure of the flange coupling device which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Folding flange 2 Fastening member 3 Sealing member 5a, 5b Duct 6 Air outlet 11 Flange part 12 Folding part 13 Joint part

Claims (2)

At the required position on the duct line where the cylindrical duct is constructed to the required length, an air outlet formed in a cylindrical shape with the same diameter as the duct is connected to both ducts on both sides, and the air flow in the duct line It is a method of forming an air conditioning duct that is configured to form a path and blow out a part of the air flowing through the duct line from the air outlet.
A joint portion formed in an annular shape with an inner diameter corresponding to the diameter of the connection end at the connection ends of the air blower at both side connection ends and the duct air blowout port, and extends from one end of the joint portion in the diameter direction A folded flange formed with a formed flange portion and a folded portion obtained by folding the outer peripheral portion of the flange portion to the opposite side of the connecting end at a predetermined angle, the outer surface of the flange portion being at the same position as the connecting edge or the connecting end Join at the joint so that it is located outside the edge,
Mating flange portion of the folded flange connecting end of the air outlet respectively on both sides of the duct on both sides connecting ends of luck to abut, arranged sealing member to extend across the pair of the folded portion, both sides of the folded disposing a fastening member formed in the smaller internal angle than the folded angle section forms on the sealing member, the fastening via the sealing member the pair of the folded portions so that the fastening member is its diameter reduced the Rukoto the male clamping mutual fastening a member, the method of forming the air-conditioning duct, characterized by connecting the air outlet to both sides of the duct. The method for forming an air conditioning duct according to claim 1, wherein the fastening member connects a pair of semicircular bands at one end thereof, and the other end is fastened by a binding screw .

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