JP2009036463A - Plate material assembly duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate material assembling duct with ease of connection, by restraining the quantity of material used, while securing sealability. <P>SOLUTION: This duct is assembled by joining a soft plate-like base material having the thickness. A joining part of the base material is formed as a structure of meshing a projection part 6 and a recessed part 7 by alternately repeatedly forming the projection part 6 and the recessed part 7 on the joining edge. A width of the projection part 6 of the joining edge is formed larger than a width of the recessed part 7, and the projection part 6 is pressed in the recessed part 7. The base material is formed by laminating a corrugated board 2 being a core material by aluminum foil 3, and sealing the joining part with an aluminum tape 9. The duct is formed by bending the base material in a square cylindrical shape along a ruled line, and a plurality of base materials are joined, and are assembled as a joint of a bending shape of a flow passage, a branching shape or a changing shape of a cross section. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a duct that is assembled from a soft plate-like base material having a thickness such as corrugated cardboard, phenol resin, urethane, glass wool, and the like, and is installed for air conditioning or ventilation.

  In recent years, corrugated ducts that are lightweight, excellent in workability and heat insulation, and easy to dispose of when removed are drawing attention. As an example of such a duct, the following Patent Document 1 discloses an auxiliary member that bends a base material made of a corrugated board into a rectangular tube shape along a ruled line, overlaps a passage portion on one surface, and eliminates a step. It describes what has been made easier to apply affixing and connecting tapes.

  Patent Document 2 below describes a corrugated duct formed by superposing a base material bent into a rectangular tube shape along a ruled line over the entire surface across the ridgeline and winding an adhesive tape. Yes.

  Further, in Patent Document 3, the base material coated with aluminum foil is bent into a rectangular tube shape along the ruled line, and the joint portion is overlapped on the inner side of the surface and fixed with a fastening clip. A device in which the outside of the portion is sealed with aluminum tape has been proposed.

JP 2006-29681 A JP 2006-29682 A JP 2007-147185 A

  However, in the ones described in Patent Documents 1 and 2, since one surface of the rectangular tube duct is entirely double, the amount of material corrugated cardboard is increased, which is disadvantageous in terms of weight and cost. There is a problem of becoming.

  Moreover, in the thing of patent document 3, since the level | step difference by a passage part arises in an inner periphery, it becomes difficult to insert a small diameter duct in an opening end, and to connect ducts, and the length of a passage part also becomes Since it is necessary, there is a problem that the amount of material used cannot be reduced so much.

  Accordingly, an object of the present invention is to provide a plate assembly duct that can suppress the amount of material used and can be easily connected while ensuring sealing performance.

  In order to solve the above-described problems, in the present invention, in a duct assembled by joining soft plate-like base materials having a thickness, the joint portion of the base material is formed by alternately repeating convex portions and concave portions on the joint edge. The convex portion and the concave portion are engaged with each other, and the width of the convex portion of the joint edge is made larger than the width of the concave portion, and the convex portion is press-fitted into the concave portion, or the convex portion of the joint edge is The trapezoidal shape is widened forward, and the concave portion is trapezoidal in the back.

  Also, corrugated cardboard was used as the core material of the base material, the core material was laminated with aluminum foil, and the joint was sealed with aluminum tape.

  Then, a duct is formed by bending the base material into a square tube shape along the ruled line, and a joint having a shape in which the flow path bends, branches or cross-section changes by joining a plurality of base materials. It was assembled.

  In addition, the bent portion of the base material that becomes the inner wall of the bent portion of the flow path is sandwiched between the concave portions of the base material that becomes the top wall and the bottom wall, and the bent portion of the base material that becomes the outer wall of the bent portion of the flow path The convex part of the base material used as the top wall and the bottom wall was press-fitted into the concave part at the position.

  Also, ducts with different diameters are inserted to make a multiple structure, the large diameter duct and the small diameter duct are shifted in the axial direction, and the small diameter duct protruding from the large diameter duct is inserted into the large diameter duct of the adjacent multiple duct and connected. It was.

  In the plate material assembly duct according to the present invention, the base material is joined without overlapping by meshing the convex part and concave part of the joint edge, so that there is no step in the joint part, and the tape can be easily attached and high. Sealability can be obtained, and nonflammability and heat insulation can be ensured.

  In addition, since the passage portion is unnecessary, the amount of corrugated cardboard used can be suppressed, the weight can be reduced, and the cost can be reduced.

  Furthermore, it becomes easy to insert a small-diameter duct into a large-diameter duct to increase the heat insulation property by using a multiple structure, or to connect the ducts by mutual insertion.

  First, as a first embodiment of the present invention, a rectangular tubular straight pipe duct will be described with reference to FIGS. 1 to 5.

  As shown in FIG. 1, the straight pipe duct D is composed of a single base material 1. The base material 1 is manufactured using a double-sided corrugated cardboard 2 in which large and small layers such as A-stage and B-stage are laminated as a main material. Here, the corrugation means a corrugated corrugation of the corrugated cardboard, and the corrugation direction is represented by the direction in which the corrugation of the corrugation extends.

  On both surfaces of the corrugated cardboard 2 of the base material 1, an aluminum foil 3 obtained by thinly extending aluminum through an adhesive, for example, polyethylene, which is a thermoplastic resin, is laminated, and the surface of the aluminum foil 3 has a nitrocellulose resin varnish or the like. It is coated with a heat-resistant paint.

  As shown in a developed state in FIG. 2, four side plates 5 are formed on the base material 1 via ruled lines 4 that are orthogonal to the steps of the cardboard 2. And the convex part 6 and the recessed part 7 are repeatedly formed in the joining edge of the side plate 5 of both ends alternately.

Here, as shown in FIG. 3, the width α ₁ of the convex portion 6 is equal to or larger than the width α _{2 of the} concave portion 7. If the widths α ₁ and α ₂ are equal, the convex portion 6 and the concave portion 7 can be easily meshed at the time of assembly, which will be described later. However, in order to improve the sealing performance by utilizing the properties of the cardboard, the width α ₁ Is set to be larger than the width α ₂ so that the convex portion 6 is pressed into the concave portion 7 while being crushed.

Further, in order to make the outer surface of the connecting portion flat, the protruding amount β ₁ of the convex portion 6 and the cutting amount β _{2 of the} concave portion 7 are preferably set to be substantially the same as the thickness t of the base material 1.

  Further, the outer edge of the cardboard 2 is sealed with an aluminum tape 8 having an adhesive layer and an aluminum layer, but this operation may be performed during assembly.

  In order to assemble a duct from such a base material 1, as shown in FIG. 1, the base material 1 is bent into a rectangular tube shape along the ruled line 4, and the convex portions 6 and the concave portions 7 of the side plates 5 at both ends orthogonal to each other are formed. The base material 1 is joined by meshing, and the joint portion is sealed with the aluminum tape 9.

  At this time, if the base material 1 is bent so that the small step layer is on the outer surface side, the air layer is prevented from being crushed as much as possible, the smoothness on the outer surface side is improved, and the occurrence of cracks is also prevented.

  In addition, when the cross-sectional dimension is large, a metal square ring reinforcing member 10 may be inserted therein in order to stabilize the shape.

  In such a straight pipe duct D, the base material 1 is joined without being overlapped by the engagement of the convex portion 6 and the concave portion 7, so that there is no step in the joint portion, and the aluminum tape 9 is easily attached. Thus, high sealing performance can be obtained, and nonflammability and heat insulation can be ensured.

  In addition, since the passage portion is unnecessary, the amount of corrugated cardboard used can be suppressed, the weight can be reduced, and the cost can be reduced.

Furthermore, as shown in FIG. 4, ducts D _L and D _S having different diameters can be inserted to form a multiple structure. Thereby, heat insulation can be improved, surface strength is also strengthened, and it can be used even under conditions with high internal pressure.

In this case, the junction of the duct D _L, the substrate 1 of the D _S is, placing the edge portion that does not overlap, the sealing property is enhanced. The layer of aluminum foil 3 laminated cardboard 2 need only provided on the inner and outer peripheral surfaces of the duct D _L of the duct D _S.

Also, when fixed in a state shifted a large diameter duct D _L and a small-diameter duct D _S in the axial direction, inserting the small diameter ducts D _S protruding from the large-diameter duct D _L, a large-diameter duct D _L adjacent multiple duct Thus, the ducts can be connected to each other.

  In addition, as shown in FIG. 5, it is easy to connect the ducts D by inserting the cylindrical connection member 11. The connecting member 11 may be made of corrugated cardboard similar to the duct, or may be made of metal.

  Next, as a second embodiment of the present invention, an elbow joint duct that bends the flow path will be described with reference to FIGS.

  As shown in FIG. 6, the joint duct E includes an L-shaped base material 21 serving as a top wall and a bottom wall, a base material 22 serving as an inner wall, and a base material 23 serving as an outer wall. . The base materials 21, 22, and 23 are each formed by laminating aluminum foil 3 on both surfaces of the cardboard 2.

  As shown in FIG. 7, vertical ruled lines 4 are respectively inserted in the base materials 22 and 23, and the inner and outer connection edges of the base material 21 and the upper and lower connection edges of the base materials 22 and 23 are The convex portions 6 and the concave portions 7 are alternately and repeatedly formed.

  In order to assemble the joint duct E from such base materials 21, 22, and 23, as shown in FIG. 6, the base portions 22 and 23 are bent along the ruled line 4 and the convex portions 6 and the concave portions 7 are bitten. In addition, the base material 21 and the base materials 22 and 23 are joined, and the joint portion is sealed with the aluminum tape 9.

  In such a joint duct E, the connection ports at both ends communicate with each other inside, and by inserting and connecting components such as the duct D to each connection port, the flow path of the duct is bent at a right angle to change the flow direction. be able to.

  Further, the convex portion 6 at the bending position of the base material 22 serving as the inner wall is sandwiched between the concave portions 7 of the base material 21 serving as the top wall and the bottom wall, and the base portion 23 is inserted into the concave portion 7 at the bending position of the base material 23 serving as the outer wall. When the convex portion 6 of the material 21 is press-fitted, the airtightness of the flow path can be improved.

  Next, as a third embodiment of the present invention, a T-type joint duct for branching a flow path will be described with reference to FIG.

  The joint duct F includes two T-shaped flat base materials 31, a base material 32 serving as a back wall, and base materials 33 and 34 serving as corner walls. Each of the base materials 31 to 34 is formed by laminating aluminum foil 3 on both surfaces of the cardboard 2.

  The base lines 33 and 34 are respectively provided with vertical ruled lines 4, and convex portions are formed on the connection edges on the back side and corners of the base material 31 and on the upper and lower connection edges of the base materials 32, 33 and 34, respectively. 6 and recesses 7 are formed alternately and repeatedly.

  In order to assemble the joint duct F from such base materials 31 to 34, the base material 31 and the base materials 32, 33, and 34 are respectively connected to the convex portion 6 while bending the base materials 33 and 34 along the ruled line 4. And the recess 7 are engaged and joined, and the joined portion is sealed with an aluminum tape 9.

  In such a joint duct F, the three connection ports communicate with each other inside, and by inserting and connecting components such as the duct D to the connection ports, the flow paths of the duct can be branched. A flow path can be configured.

  Next, as a fourth embodiment of the present invention, a throttle joint duct that changes the cross section of the flow path will be described with reference to FIG.

  The joint duct G is composed of two base materials 41 and 42 each having a tapered width at an intermediate portion. The base materials 41 and 42 are formed by laminating the aluminum foil 3 on both surfaces of the cardboard 2.

  Each of the base materials 41 and 42 is provided with a vertical ruled line 4 that divides a tapered portion, and convex portions 6 and concave portions 7 are alternately and repeatedly formed on connection edges on both sides of the base materials 41 and 42, respectively. Has been.

  In order to assemble the joint duct G from such base materials 41, 42, the base materials 41, 42 are bent along the ruled line 4, and the convex portion 6 and the concave portion 7 are engaged with each other, so that two base materials are provided. 41 and 42 are joined in a rectangular tube shape, and the joint is sealed with aluminum tape 9.

In such joint duct G, communicating different ends of the connection opening sizes is internally by connecting insert respectively a large-diameter duct D _L and a small-diameter duct D _S to each connection port, the flow path of the duct The cross-sectional area can be changed.

  In addition, although illustrated about the joint duct which changes the cross-sectional area of a flow path here, a cross-sectional area does not change and the joint duct from which a cross-sectional shape changes is applied by the above-mentioned structure, and it forms with the same joining structure. You can also.

  Next, as a fifth embodiment, a straight pipe duct having a trapezoidal cross-sectional shape will be described with reference to FIG.

  The duct H is composed of a single base material 51, and the base material 51 is formed by laminating the aluminum foil 3 on both surfaces of the cardboard 2.

  The base 51 is provided with ruled lines 4 orthogonal to the steps of the cardboard 2 to form an upper plate 52, a lower plate 53, and a pair of side plates 54. The upper plate 52 is wider than the lower plate 53, and each side plate 54 is provided with an air outlet 55. Convex portions 6 and concave portions 7 are alternately and repeatedly formed at the joining edge of the upper plate 52 and one side plate 54 which are both ends of the substrate 51.

  In order to assemble the duct H from such a base material 51, the base material 51 is bent along the ruled line 4 into a square tube shape having a trapezoidal cross section, the convex portions 6 and the concave portions 7 are engaged, and the base material 51 is joined. The joint is sealed with aluminum tape 9.

  In such a trapezoidal-shaped duct H, air can be blown obliquely downward from the air outlet 55, so that the room can be efficiently cooled and heated while installed on the ceiling.

  In addition, although illustrated about the trapezoidal-section duct here, the same joining structure is employable also about the pentagonal or hexagonal-section duct. And when assembling on the spot, it can be carried into the spot in an unfolded state or folded in two and not bulky.

In each of the above embodiments, the convex portion 6 and the concave portion 7 are shown in a rectangular shape having the same width from the proximal end to the distal end. However, as shown in FIG. Alternatively, the recess 7 may have a trapezoidal shape with a depth, and the width α ₃ of the tip of the protrusion 6 may be wider than the width α ₄ of the opening of the recess 7.

  In this case, as shown in FIG. 12, when the base materials 1 are bonded to each other, both side portions of the convex portion 6 are sandwiched by the concave portion 7 while being deformed, and the convex portion 6 is difficult to be removed from the concave portion 7, and the tensile force Therefore, it is possible to achieve a reliable bonding that can counteract the above.

The perspective view of the straight pipe duct which concerns on 1st Embodiment of this invention The figure which shows the expansion | deployment state of a base material same as the above (A) Enlarged plan view, (B) Enlarged sectional view showing the dimensional relationship between the convex part and the concave part. A perspective view showing an example of a multiple structure as above The perspective view which shows the usage example of a connection member same as the above The perspective view of the elbow type joint duct which concerns on 2nd Embodiment of this invention The figure which shows the expansion | deployment state of a base material same as the above A perspective view of a T-shaped joint duct according to a third embodiment of the present invention. A perspective view of a throttle joint duct according to a fourth embodiment of the present invention. The perspective view of the trapezoid straight pipe duct which concerns on 5th Embodiment of this invention The enlarged plan view which shows other embodiment of a convex part and a recessed part The enlarged perspective view which shows the joining state by the convex part and concave part same as the above

Explanation of symbols

D Straight pipe duct 1 Base material 2 Corrugated board 3 Aluminum foil 4 Ruled line 5 Side plate 6 Convex part 7 Concave part 8 and 9 Aluminum tape 10 Reinforcement member 11 Connection member E Elbow type joint duct 21, 22, 23 Base material FT type joint duct 31 , 32, 33, 32 Base material G Restriction joint duct 41, 42 Base material H Trapezoid straight pipe duct 51 Base material 52 Upper plate 53 Lower plate 54 Side plate 55 Air outlet

Claims (10)

  In ducts assembled by joining soft plate-like base materials with a thickness, base material joints are formed by alternately repeating convex parts and concave parts at the joint edge, and meshing the convex parts and concave parts. A duct characterized by its structure.   The duct according to claim 1, wherein the width of the convex portion of the joint edge is made larger than the width of the concave portion, and the convex portion is press-fitted into the concave portion.   The duct according to claim 1, wherein the convex portion of the joint edge has a trapezoidal shape that spreads forward, and the concave portion has a trapezoidal shape that spreads deeply.   The duct according to any one of claims 1 to 3, wherein corrugated cardboard is used as a core material of a base material.   The duct according to any one of claims 1 to 4, wherein the core material of the base material is laminated with an aluminum foil, and the joint portion is sealed with an aluminum tape.   6. The duct according to claim 1, wherein the duct is formed by bending a base material into a rectangular tube shape along a ruled line.   The duct according to any one of claims 1 to 5, wherein a plurality of base materials are joined and assembled into a joint having a shape in which a flow path bends, a shape that branches, or a shape in which a cross section changes. .   8. The duct according to claim 7, wherein the convex portion at the bending position of the base material that becomes the inner wall of the curved portion of the flow path is sandwiched between the concave portions of the base material that becomes the top wall and the bottom wall, and the outside of the curved portion of the flow path. A duct characterized in that a convex portion of a base material to be a top wall and a bottom wall is press-fitted into a concave portion of a bending position of the base material to be a wall.   The duct according to any one of claims 1 to 8, wherein ducts having different diameters are inserted into a multiple structure.   The duct according to claim 9, wherein the large diameter duct and the small diameter duct are shifted in the axial direction, and the small diameter duct protruding from the large diameter duct is inserted and connected to the large diameter duct of the adjacent multiple duct. Duct to do.

Images