JP2009036470A - Gasket for duct, and collapsible duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasket for a duct, and a collapsible duct, capable of surely sealing between a flange corner and a corner piece without filling a caulking material. <P>SOLUTION: This gasket 6 for the duct is arranged in the collapsible duct 1 for freely rotating a corner part 2a being a joining part of wallboards 21-24 and wallboards 21-24, and has a bar-shaped gasket 62a of a bar shape arranged in the corner part 2a and extending along the rotational axis C of the corner part 2a, and a sheet-like corner gasket 6b arranged in an end part of this bar-shaped gasket 62a and sealing the part between the corner 2b<SB>1</SB>of the flange 2b of the collapsible duct 1 and the corner piece 5 oppositely arranged in this corner 2b<SB>1</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a foldable duct for air conditioning, and more particularly to a duct gasket for preventing leakage of conditioned air and a foldable duct provided with the duct gasket.

  A folding duct that can be folded in a rectangular duct having a rectangular (quadrangle) cross section is known (for example, see Patent Document 1). For example, this foldable duct is formed in a cylindrical shape with four wall plates, and a corner portion which is a joint portion between the wall plates and the wall plate is rotatable, and the wall plates are overlapped by rotating the corner portions. The whole can be folded (flattened). Moreover, a corner | angular part can be rotated from the folded state, and it can expand | deploy to a cylinder shape. In a foldable duct, a rod-like gasket extending along the rotation center axis is disposed inside a rotatable corner that is a joint between the wall plate and the opening end of the duct. A corner piece for maintaining a cylindrical shape is attached to the corner of the flange.

Such a foldable duct can be folded to reduce the volume of the duct and reduce the transportation volume and storage volume. Therefore, the transportation cost from the factory that produces the duct to the installation site where the duct is installed (such as a construction site) It has the advantage that the storage cost of the duct can be reduced.
JP 2004-3821 A

  However, in the conventional folding duct, a gap is formed between the corner of the flange and the corner piece. Therefore, after the installation of the duct is completed, it is necessary to fill the gap with a caulking material, which requires a lot of time and labor. There was a problem.

  Accordingly, an object of the present invention is to provide a duct gasket and a foldable duct that can reliably perform sealing between a corner of a flange and a corner piece without filling a caulking material.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a folding duct in which a wall plate is disposed in four directions in a cylindrical shape and a corner portion which is a joint portion between the wall plate and the wall plate is rotatable. A duct gasket to be disposed, which is disposed in the corner portion and extends along the rotation center axis of the corner portion, and is disposed at an end portion of the rod-shaped gasket, and is folded. It is a gasket for ducts provided with the sheet-like corner gasket which seals between the corner of the flange of a type duct, and the corner piece arranged facing this corner.

  According to this invention, the rotatable corner is sealed by the rod-shaped gasket, and the gap between the corner of the flange and the corner piece is sealed by the sheet-shaped corner gasket. Further, since the corner gasket is continuous with the rod-shaped gasket disposed in the corner portion, the gap between the end portion of the corner portion and the corner of the flange is also sealed.

  According to a second aspect of the present invention, in the duct gasket according to the first aspect, the length of the rod-shaped gasket is set so as to be disposed along the entire length of the corner portion in the rotation central axis direction. The corner gasket is disposed at both ends of the rod-shaped gasket.

  According to a third aspect of the present invention, in the duct gasket according to the first aspect, the corner gasket is disposed at one end of the rod-shaped gasket.

  The invention according to claim 4 is a foldable duct in which the wall plate is arranged in four directions in a cylindrical shape, and a corner portion which is a joint portion between the wall plate and the wall plate is rotatable. 3. A foldable duct in which the duct gasket described in any one of items 3 is provided.

  According to the first and fourth aspects of the present invention, since the work of filling the caulking material at the site where the duct is installed becomes unnecessary, the time required for airtight processing (sealing) can be shortened and the labor can be reduced. The installation period can be shortened and the construction cost can be reduced.

  According to the second aspect of the present invention, the corner portion can be sealed over the entire length by one duct gasket, and between the corners of the flanges and the corner pieces at both end portions of the duct can be sealed. In addition, the work efficiency of installing the duct gasket can be increased.

  According to the third aspect of the present invention, since the corner gasket is disposed at one end of the rod-shaped gasket, the corner gasket can be attached regardless of the length of the corner, and the folding ducts having different lengths can be used. Even if it is, the same duct gasket can be used.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
1 to 11 show Embodiment 1 of the present invention. As shown in FIG. 10, the foldable duct 1 mainly includes a duct body 2, a corner piece 5, and a duct gasket 6. As shown in FIG. 3, the duct main body 2 is a rectangular duct having four wall plates 21 to 24 made of galvanized iron arranged in four directions and having a rectangular cross section. The duct body 2 has a corner portion 2a that is a joint between the wall plates 21 to 24 and the wall plates 21 to 24, and the corner portions 2a can be rotated to overlap the wall plates 21 to 24. In this way, the whole can be folded or expanded into a cylindrical shape. That is, the corner portion 2a between the first wall plate 21 and the second wall plate 22 will be described as an example. As shown in FIGS. 3 and 4, the longitudinal direction of the first wall plate 21 (the duct main body 2). A curl-shaped single goby 21a is formed at one end edge portion extending in the direction of the axial line. On the other hand, a curl-shaped double goby 22a that engages with the single goby 21a is formed at one edge of the second wall plate 22 extending in the longitudinal direction, and the single goby 21a and the double goby 22a constitute a corner (spin goby) 2a. Has been.

  The duct main body 2 is configured such that the first wall plate 21 and the second wall plate 22 are positioned at a right angle (FIG. 4A, a state where the first wall plate 21 is expanded in a cylindrical shape). When pushed to the wall plate 22 side, the single goby 21a rotates around the double goby 22a, and the first wall plate 21 moves to the second wall plate 22 side as shown in FIG. 4B. That is, as shown in FIG. 5, the whole is folded (flattened) so that the wall plates 21 to 24 overlap. Furthermore, when the first wall plate 21 is moved away from the second wall plate 22 side from this state, the single goblet 21a is rotated about the double goby 22a, and the first wall plate 21 and the second wall plate 22 are rotated. And are at right angles. That is, the duct body 2 is in a state of being expanded in a cylindrical shape. At both ends in the longitudinal direction of the wall plates 21 to 24, vertically bent flange portions 21b to 24b are formed, and annular flanges 2b are formed at both open end portions of the duct body 2 by the flange portions 21b to 24b. Is to be formed. Outside the four (four sides) wall plates 21 to 24, a heat insulating mat (not shown) is disposed so as to continuously cover the outer peripheral surfaces of the wall plates 21 to 24.

  At both end portions of the wall plates 21 to 24 in the longitudinal direction, stopper portions 2d protruding outward from the cylinder are continuously formed along the flange portions 21b to 24b. The stopper portion 2d is formed so as to protrude in an oblique direction as shown in FIG. 8, and the stopper portion 2d is easily deformed when the corner piece 5 is mounted by inclining the stopper portion 2d. . As shown in FIG. 9, the shape and the formation position of such a stopper portion 2d can push the corner piece 5 into the flange 2b side from the wall plates 21 to 24 side (by applying pressure, the corner piece 5 The inner peripheral protruding piece 5e can pass through the upper surface of the stopper portion 2d), and the plate surface of the corner piece 5 and the plate surface of the flange 2b are joined together via the flat plate gasket portion 6c of the duct gasket 6 described later. The inner peripheral protruding piece 5e is set so as to be sandwiched between the lower surface of the stopper portion 2d and the plate surface of the flange 2b.

  On the other hand, the engaging part 2c is continuously formed in the edge of the flange parts 21b-24b along the edge of the flange parts 21b-24b. The engaging portion 2c has a tip portion that is inclined downward, and is entirely formed in a key shape. As will be described later, the shape and the formation position of the engaging portion 2c are such that the engaged portion 5f of the corner piece 5 can pass through the distal end portion of the engaging portion 2c by applying pressure, and the corner piece. 5 and the plate surface of the flange 2b are set so that the engaged portion 5f can be engaged by the tip of the engaging portion 2c when the plate gasket portion 6c of the duct gasket 6 is joined together. Yes.

  As shown in FIG. 6, the corner piece 5 has a flat plate shape and is substantially L-shaped. A mounting hole 5b is formed at the corner of the flat plate portion 5a of the corner piece 5, and an inner angle protruding piece 5c rising from the flat plate portion 5a (plate surface) is formed at the inner corner edge (inner corner R). The inner corner protruding piece 5c is formed so as to incline slightly inside the L shape (center side of the duct body 2) from the inner corner edge as the base end toward the free end. Notches 5d are formed on both sides of the inner corner protruding piece 5c, and an inner peripheral protruding piece 5e rising vertically from the flat plate portion 5a is formed on the inner peripheral edge extending from the notch 5d to the end as shown in FIG. ing. As described above, the shape (height) and the formation position of the inner peripheral protruding piece 5e can push the corner piece 5 from the wall plates 21 to 24 to the flange 2b side (by applying pressure, the inner periphery The projecting piece 5e can pass through the stopper portion 2d), and when the flat plate portion 5a of the corner piece 5 and the plate surfaces of the flange portions 21b to 24b are joined together via the flat plate gasket portion 6c of the duct gasket 6, The protruding piece 5e is set to be sandwiched between the lower surface of the stopper portion 2d and the plate surfaces of the flange portions 21b to 24b.

  On the other hand, on the outer peripheral edge (straight edge) excluding the outer corner edge of the corner piece 5, an engaged portion 5f that rises obliquely from the flat plate portion 5a toward the outer side (outer peripheral side) is formed. The shape (inclination angle and height) and the formation position of the engaged portion 5f can push the corner piece 5 from the wall plates 21 to 24 toward the flange 2b (by applying pressure, the engaged portion 5f can pass through the engaging portion 2c of the wall plates 21 to 24), and the flat plate portion 5a of the corner piece 5 and the plate surface of the flange 2b are joined together via the flat plate gasket portion 6c of the duct gasket 6 The engaged portion 5f is set so as to be positioned below the distal end portion of the engaging portion 2c and to engage with the engaging portion 2c.

  As shown in FIG. 4, a rod-shaped gasket 61a is disposed between the single goby 21a and the double goby 22a at the corner 2a. The rod-shaped gasket 61a is a rod-shaped gasket extending along the rotation center axis C of the corner portion 2a, and the cross-sectional shape is a circular tube. The rod-shaped gasket 61a is made of an elastically deformable resin and has a function of sealing between the single goby 21a and the double goby 22a. The rod-shaped gasket 61a extends over the entire length of the corner 2a.

1 and 2 show a duct gasket 6. The duct gasket 6 includes a rod-shaped gasket 62a having the same structure as the above-described rod-shaped gasket 61a, and a corner gasket 6b disposed at one end of the rod-shaped gasket 62a. The rod-shaped gasket 62a in FIG. 1 is significantly shorter than the length of another rod-shaped gasket 61a disposed in the corner 2a, from the position A corresponding to the vicinity of the end of the corner 2a to the tip. Is arranged in the corner 2a. The corner gasket 6b is made of a sheet-like gasket having a predetermined thickness, and is made of a material different from that of the rod-like gasket 62a. Corner gasket 6b is composed of a resin having a deformable elastic by compression force, the corner piece 5, which is arranged opposite the corner 2b ₁ of the folding duct 1 of the flange 2b in this corner 2b ₁ It has a function to seal the gap. As shown in FIG. 1, the corner gasket 6 b is disposed so as to face the flat gasket portion 6 c disposed so as to face the flat plate portion 5 a of the corner piece 5 and the inner corner protruding piece 5 c of the corner piece 5. And a standing gasket portion 6d.

  The flat gasket portion 6c of the corner gasket 6b has an L shape in plan view. At the outer corner of the flat gasket portion 6c, a notch 6e for passing a bolt (not shown) inserted through the mounting hole 5b of the corner piece 5 is formed. The vertical plate gasket portion 6d rises from the inner corner of the flat plate gasket portion 6c, and the planar shape is substantially L-shaped. One end of the rod-shaped gasket 62a is joined to the inside of the corner of the upright gasket portion 6d. The corner gasket 6b in FIG. 1 is constituted by joining a flat gasket portion 6c and a vertical gasket portion 6d, which are separate members, but the corner gasket 6b includes a flat gasket portion 6c and a vertical gasket portion 6d. An integrally molded structure may be used.

  Next, the attachment procedure and operation of the folding duct 1 in the first embodiment will be described. As shown in FIG. 5, the foldable duct 1 is carried into the installation site with the wall plates 21 to 24 being folded. In this state, the rod-shaped gasket 61a is already disposed in the corner portion 2a. Thereafter, the foldable duct 1 carried into the installation site is developed into a cylindrical shape as shown in FIG. As shown in FIG. 4, since the rod-shaped gasket 61a is disposed over the entire length of the corner portion 2a, the space between the single goby 21a and the double goby 22a in the corner portion 2a is sealed by the rod-shaped gasket 61a when the duct body 2 is deployed. Is done.

Thereafter, the duct gasket 6 is attached in a state where the duct body 2 is expanded. First, the rod-shaped gasket 62a of the duct gasket 6 is inserted into the corner 2a. Insertion of the rod-shaped gasket 62a into the corner 2a makes the rod-shaped gasket 62a parallel to the rotation center axis C. In this state, the tip of the rod-shaped gasket 62a is connected to the single goby 21a and the double goby 22a at the end of the corner 2a. This is done by inserting it into the gap. When the insertion of the corner 2a of the rod-shaped gasket 62a is completed, as shown in FIG. 1, folded 180 ° in the direction of the arrow F a rod gasket 62a to position A as a reference point, the rear corner gasket 6b corner 2b ₁ of the flange 2b Position on the side. In this state, as shown in FIG. 7, the corner gasket 6b is flat gasket portion 6c is opposed to a corner 2b ₁ of the flange 2b, upright gasket portion 6d is opposed to the outer surface of the corner portion 2a near the corner 2b ₁ become. Here, when positioning the corner gasket 6b on the back side of the corner 2b ₁ of the flange 2b is a corner gasket 6b would interfere with the end portion of the flange portion 21b to 24b, corner gasket 6b is elastically deformable because it is composed of a resin, can be passed through a corner 2b ₁ by folding once the corner gasket 6b, it is possible to easily position the corner gasket 6b on the back side of the corner 2b ₁ of the flange 2b.

Next, as shown in FIG. 8, to position the corner piece 5 over the corner 2b ₁ of the flange 2b, pushes the corner piece 5 from the wall plate 21 to 24 side to the flange 2b side. At this time, the inner peripheral protruding piece 5e of the corner piece 5 passes through the stopper portion 2d along the upper surface of the stopper portion 2d while the stopper portion 2d of the wall plates 21 to 24 is slightly deformed by the pushing force (pressure). At the same time, the engaged portion 5c moves along the inclined portion of the engaging portion 2c while passing through the engaging portion 2c while the inclined portion of the engaging portion 2c is slightly deformed. Then, as shown in FIG. 9, when the flat plate portion 5a of the corner piece 5 is pushed in until it is aligned with the flat plate gasket portion 6c of the duct gasket 6, the inner peripheral protruding piece 5e connects the lower surface portion of the stopper portion 2d and the flat gasket portion 6c. And the engaged portion 5f is engaged with the engaging portion 2c. Thereby, the corner piece 5 is attached to the corner 2b ₁ of the flange 2b of the duct body 2. In the state in which the corner piece 5 is attached, the rotation of the corner portion 2a is locked by the corner piece 5, so that the foldable duct 1 is maintained as a square duct having a rectangular tube shape by the wall plates 21 to 24.

As shown in FIG. 11, when the corner piece 5 is completely attached, the flat gasket portion 6 c of the corner gasket 6 b is in close contact with the plate surfaces of the flange portions 21 b to 24 b and the flat plate portion 5 a of the corner piece 5. Become. Thus, between the flat plate portion 5a of the flange portion end plate surface and the corner piece 5 of 21b~24b a corner 2b ₁ of the flange 2b is sealed by the flat gasket portion 6c. Further, in this state, the standing plate gasket portion 6d is in close contact with the outer surface in the vicinity of the corner portion 2a of the wall plates 21 to 24. Therefore, the standing plate gasket portion is also provided between the inner corner protruding piece 5c of the corner piece 5 and the wall plates 21 to 24. Sealed by 6d. Further, the corner gasket 6b, so are continuous with the rod-shaped gasket 62a disposed in the corners 2a, between the corner 2b ₁ of the end and the flange 2b of the corner 2a is also sealed. Note that the corner gasket 6b is when positioned in the corner 2b ₁ of the flange 2b, since the state of being supported by the rod-shaped gasket 62a, to improve the mounting workability of the corner gasket 6b than when there is no rod-shaped gasket 62a Is possible.

  In this way, the use of the duct gasket 6 eliminates the need to fill the caulking material at the duct installation site, so that the time required for hermetic treatment (sealing) can be reduced and labor can be reduced compared to the conventional case. It is possible to shorten the installation period of the duct 1 and reduce the construction cost. Further, since the corner gasket 6b is disposed at one end portion of the rod-shaped gasket 62a disposed in the corner portion 2a, the corner gasket 6b can be attached regardless of the length of the corner portion 2a. Even if the foldable ducts 1 are different, the same duct gasket 6 can be used.

(Embodiment 2)
FIG. 12 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is only the length of the rod-shaped gasket 62a in the duct gasket 6 and the mounting position of the duct gasket 6, and the other configurations are the same as in the first embodiment. By attaching the same reference numerals as those in Embodiment 1, the description of the corresponding parts is omitted.

  In FIG. 12, corner gaskets 6b are disposed at both ends of the rod-shaped gasket 62a. The corner gasket 6b is joined to the end portion of the rod-shaped gasket 62a on the corner inner surface side. The distance L between the position A1 and the position A2 corresponding to the vicinity of the end of the corner 2a in the rod-shaped gasket 62a, that is, the distance L between the corner gasket 6b and the corner gasket 6b is the corner 2a of the foldable duct 1. It is set to be slightly larger than the total length. In the second embodiment, only the rod-shaped gasket 62a is disposed in the corner portion 2a, and the rod-shaped gasket 61a shown in FIG. 4 is not used. In the second embodiment, the length (distance L) of the rod-shaped gasket 62a is set so that the entire length of the corner portion 2a can be sealed, and the entire length of the corner portion 2a can be sealed only by the rod-shaped gasket 62a. Because it can. Therefore, in Embodiment 2, the rod-shaped gasket 61a used in Embodiment 1 is not necessary.

In the second embodiment configured as described above, the rod-shaped gasket 62a of the duct gasket 6 is inserted into the corner portion 2a in the manufacturing factory of the folding duct 1, and each corner gasket 6b is connected to the corner 2b _{1 of the} flange 2b. Located in the vicinity. The rod-shaped gasket 62a is inserted into the corner 2a by setting the rod-shaped gasket 62a to the side of the corner 2a, and the rod-shaped gasket 62a from the lateral direction of the corner 2a (direction perpendicular to the rotation center axis C). This is done by pushing into the gap between 21a and the double gob 22a. When the foldable duct 1 is carried into the installation site, the foldable duct 1 is developed into a cylindrical shape. Then, it folded 180 degrees rod-like gasket 62a the position A1 to the position A2 as a reference point to position the respective corner gasket 6b on the back side of the corner 2b ₁ of the flange 2b. In a state where the corner gasket 6b is positioned on the rear side of the corner 2b ₁ of the flange 2b, the corner piece 5 is pushed from the wall plate 21 to 24 side to the flange 2b side, the corner piece 5 is mounted on the corner 2b ₁ of the flange 2b The In this state, between the flat plate portion 5a of the flange portion end plate surface and the corner piece 5 of 21b~24b a corner 2b ₁ of the flange 2b is sealed by the flat gasket portion 6c, interior angle projecting piece of the corner piece 5 The space between 5c and the wall plates 21 to 24 is also sealed by the standing plate gasket portion 6d.

Thus, by one of the ducts for the gasket 6 in the second embodiment, with the corner 2a may be sealed over the entire length, sealing between the corners 2b ₁ and the corner piece 5 of the flange 2b at the opposite ends of the duct Therefore, the efficiency of attaching the duct gasket 6 can be improved as compared with the first embodiment.

  Although the embodiments of the present invention have been described above, the specific configuration is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the case where the duct body 2 is a rectangular duct has been described. However, the duct body 2 may be an L-shaped elbow, an S-curved escan, a hopper, or the like. Of course. Moreover, although it is set as the structure which arrange | positions a heat insulation mat (not shown) so that the outer peripheral surface of the wall boards 21-24 may be covered continuously, this invention is a folding duct which built the heat insulation member in the wall boards 21-24 beforehand. It can also be applied to.

It is a perspective view of the gasket for ducts concerning Embodiment 1 of the present invention. It is a bottom view of the gasket for ducts of FIG. It is a perspective view which shows the state which expand | deployed the foldable duct in which the gasket for ducts of FIG. 1 is used. 3 shows corners of the folding duct in FIG. 3, (a) shows a state in which the wall plate and the wall plate are positioned at right angles, and (b) shows a state in which the wall plate and the wall plate are positioned in parallel. FIG. It is a front view which shows the state which folded the foldable duct of FIG. It is a top view of the corner piece used for the foldable duct of FIG. It is a perspective view which shows the state which attached the gasket for ducts to the foldable duct of FIG. It is an expanded sectional view which shows the state which mounts | wears with the corner piece in the foldable duct of FIG. It is an expanded sectional view which shows the state which mounted | wore with the corner piece to the foldable duct of FIG. It is a perspective view which shows the state which attached the gasket for ducts and the corner piece to the foldable duct of FIG. It is a fragmentary perspective view which shows the attachment state of the corner piece in the foldable duct of FIG. It is a perspective view of the gasket for ducts concerning Embodiment 2 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding type duct 2 Duct main body 21 Wall board 22 Wall board 23 Wall board 24 Wall board 2a Corner | angular part 2b Flange 2b ₁ Corner of 2 flange 2c Engagement part 2d Stopper part 5 Corner piece 5a Flat plate part 5c Inner corner protrusion piece 5e Inner circumference protrusion Piece 5f Engaged portion 6 Duct gasket 61a Rod gasket 62a Rod gasket 6b Corner gasket 6c Flat gasket portion 6d Standing gasket portion C Corner rotation center axis

Claims (4)

A gasket for a duct in which a wall plate is disposed in four directions in a cylindrical shape, and a corner portion which is a joint portion between the wall plate and the wall plate is disposed in a foldable duct that is rotatable,
A rod-shaped rod-shaped gasket disposed in the corner portion and extending along the rotation center axis of the corner portion;
A sheet-like corner gasket that is disposed at an end of the rod-shaped gasket and seals between a corner of the flange of the foldable duct and a corner piece disposed to face the corner;
A duct gasket characterized by comprising:   The length of the rod-shaped gasket is set so as to be disposed along the entire length of the corner portion in the rotation center axis direction, and the corner gasket is disposed at both ends of the rod-shaped gasket. The duct gasket according to claim 1.   The duct gasket according to claim 1, wherein the corner gasket is disposed at one end of the rod-shaped gasket. The wall plate is arranged in four directions in a cylindrical shape, and a corner portion that is a joint portion between the wall plate and the wall plate is a foldable duct that is freely rotatable,
A foldable duct, wherein the duct gasket according to any one of claims 1 to 3 is disposed.

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