JP6460350B2 - Duct and duct connection structure - Google Patents

Description

  The present invention relates to a duct and a duct connection structure in which two ducts having a rectangular cross section formed into a cylindrical shape by joining wall plates for air conditioning or intake / exhaust are connected together.

  Conventionally, a common plate flange connection method called TDC or TFD is well known as a duct connection structure. In this co-plate flange connection method, the flanges for connection are formed on the four sides of the cylindrical opening end portion of the duct by bending the four sides of the opening end portions of the cylindrical duct at right angles outward. . Then, after abutting the flange parts through gaskets, the L-shaped corner pieces attached to the four corners of each flange part are bolted and nut-fastened, and the abutted flange parts are elastically sandwiched with clips, A construction method of connecting flange portions (cylindrical ducts) to each other is used. (For example, refer to Patent Document 1 or 2.)

  In such a conventional duct connection structure (co-plate flange connection method), the clip (plate thickness is 1.0 mm) described above for each side of the contacted portion where the bolt is fixed only at the four corners (corner pieces). It is configured to increase the strength by engaging the metal fittings.

JP 7-91723 A JP 2011-122810 A

  However, in the conventional duct connection structure, the bolts between the flange portions of the duct are fixed only at the corner pieces at the four corners, and the load concentrates here, so there is a possibility that the corner piece alone will come off the flange portion due to an impact such as an earthquake. As a result, there is a problem in that the connecting portion (between the flange portions) between the ducts is also displaced.

  Also, in the conventional duct connection structure, the flange portions are elastically sandwiched and connected by clips, but this clip may also be disconnected by a load such as an earthquake, and the connection portions between the ducts (between the flange portions) There was a problem that would shift.

  Then, this invention aims at providing the duct and duct connection structure which can prevent the shift | offset | difference in the connection part between flange parts, without the space | interval between the flange parts which faced the ducts also coming off by load, such as an earthquake. .

In order to solve the above-mentioned problems, the invention according to claim 1 is such that a wall plate is formed in a cylindrical shape in four directions, and a flange portion extending perpendicularly to the wall plate from an opening edge projects outward. A duct connection structure for connecting the ducts formed so that the opening end portions thereof are in contact with each other, wherein the flange portion is bent at the base of the flange portion of one duct and extends along the opening edge. A convex fitting portion comprising: a linear portion of the first linear portion; a folded portion at a tip of the one linear portion; and the other linear portion extending from the folded portion toward the flange portion along the opening edge. Is formed at the base of the flange portion of the other duct, the one straight portion that is bent along the opening edge of the flange portion, the folded portion at the tip of the one straight portion, and the folded portion Along the opening edge And the other linear portion extending toward the flange portion, is fitted portion of the concave with a formation, the center portion of the flange portion of the other duct and the flange portion of said one duct hole for bolt insertion Is opened , and the one duct and the other duct are connected by fitting the fitting part into the fitted part.

  According to a second aspect of the present invention, in the duct connection structure according to the first aspect, the corner piece is attached between two orthogonal flange portions of the other duct, and the corner piece extends at a right angle. Two arm recesses and the two corner recesses extending along the longitudinal direction of the arm portion, and when mounted between two orthogonal flange portions of the other duct, The fitting portion is fitted into the corner recess.

According to a third aspect of the present invention, there is provided a duct having a cylindrical shape in which wall plates are arranged in four directions, and flange portions extending perpendicularly to the wall plate from the opening edge of both ends. The flange portion is bent at one straight portion extending along the opening edge, the folded portion at the tip of the one straight portion, and the flange portion extending from the folded portion along the opening edge. And a straight fitting portion extending toward the opening edge by bending the flange portion at the root of the other flange portion. A concave fitting portion including a folded portion at a tip of the one straight portion and the other straight portion extending from the folded portion along the opening edge toward the flange portion is formed. The one flange portion and the other flange portion In central, hole for bolt insertion is opened, the fitting portion is fittable into the fitted portion, and wherein the.

  According to the first and third aspects of the invention, since the ducts are connected in a state where the convex fitting portion and the concave fitting portion are fitted, an external force or impact due to an earthquake or the like is applied. However, it is possible to prevent the connection between the ducts from being shifted or disconnected. In addition, since the fitting portion and the fitted portion are formed on the flange portion, the fitting portion and the fitted portion can be easily seen from the outside, and the fitting portion and the fitted portion can be easily and quickly fitted. Can be performed.

  According to the second aspect of the present invention, since the corner piece having the corner concave portion in which the fitted portion is fitted between the two perpendicular flange portions of the other duct is attached, the corner portion of the flange portion is It is possible to prevent the connection between the ducts from being shifted or disconnected.

It is a disassembled perspective view which shows the structure of the duct which concerns on Embodiment 1 of this invention. It is an expansion perspective view which shows in detail the joining part and to-be-joined part of FIG. 1, (a) has shown the joining part, (b) has shown the to-be-joined part, respectively. It is a side view which shows the bending state of the joining part and to-be-joined part of FIG. 2, (a) has shown the joining part, (b) has shown the to-be-joined part, respectively. It is an assembly figure which shows the state which assembled the duct shown in FIG. 1, (a) has shown the joining part side, (b) has shown the to-be-joined part side, respectively. It is a perspective view which shows the operation | movement which abuts and connects a pair of duct of FIG. It is a perspective view which shows the duct which concerns on Embodiment 2 of this invention. It is a perspective view which shows the fitting part and to-be-fitted part in the duct of FIG. It is a perspective view which shows the corner piece by the side of the to-be-fitted part in the duct of FIG.

  The present invention will be described below based on the illustrated embodiments.

(Embodiment 1)
FIG. 1 is an exploded perspective view showing the structure of the duct 1 according to this embodiment. 2 is an enlarged perspective view showing in detail the mating portion 12 and the mated portion 13 of FIG. 1, wherein (a) shows the mated portion 12, (b) shows the mated portion 13, and FIG. Each is shown. 3 is a side view showing a bent state of the mating portion 12 and the mated portion 13 of FIG. 2, wherein (a) shows the mated portion 12 and (b) shows the mated portion 13. , Each showing. The duct 1 according to the embodiment of the present invention is used for air conditioning or intake / exhaust as shown in FIG. 1, and four wall plates 10 are arranged in four directions so that side surfaces adjacent to each other are arranged. It joins with a goby etc., it is set as a cylinder, and it is assembled so that the opening cross section of this cylindrical both ends may have a rectangular cross section.

  As shown in FIG. 1, the wall plate 10 is formed of a plate-like steel plate material and is arranged in four directions. The wall plate 10 includes a joint 11 such as a goby that joins adjacent side edges. In addition, the wall plate 10 has a convex fitting portion 12 which is bent (protruded) along one opening end edge (the right side in FIG. 1), and the other end edge portion of the joint portion 11 is bent. And a recessed fitting portion 13 extending (recessed) along the opening edge (left side in FIG. 1).

  The fitting portion 12 and the fitted portion 13 are formed so as to be fitted to each other. When the ducts 1 are brought into contact with each other, for example, the fitting portion 12 of one duct 1 and the other The fitted parts 13 of the duct 1 are coupled and connected to each other, so that a duct connection structure that can reliably prevent displacement at the connecting part between the ducts 1 is configured.

  More specifically, as shown in FIG. 2, the fitting portion 12 and the fitted portion 13 have a plurality of bending portions of the end portion of the wall plate 10 so that the strength when mating with each other at the end portion is increased. The duct connection structure can be configured with minimum folding so that the steel sheet can be easily processed while being formed so as to be secured.

  First, as shown in FIG. 2A, the fitting portion 12 is formed in the order of the first fitting component 12a, the second fitting component 12b, the third fitting component 12c, and the protruding portion 12d. It is formed by bending. The first fitting component 12a is bent so that the edge of the duct 1 on the cylindrical opening side protrudes in a vertical direction with a step having a predetermined height. The second fitting component 12b is bent to the non-opening side at a predetermined position extending from the first fitting component 12a and spaced apart. The third fitting component 12c extends from the second fitting component 12b to the step side of the first fitting component 12a, and is further bent toward the opening in the vicinity of the step. Finally, the protruding portion 12d is bent so as to protrude outward from the third fitting component 12c in parallel with the wall plate 10 (opening side) and be turned back.

  On the other hand, as shown in FIG. 2B, the fitted portion 13 includes a first fitted component 13a, a second fitted component 13b, a third fitted component 13c, and a groove. It is formed by bending in the order of 13d. The first fitted component 13a is bent so as to extend to the cylindrical opening side of the duct 1 and protrude in a vertical direction with a predetermined height. The second fitted component 13b is bent to the non-opening side at a predetermined position extending and spaced from the first fitted component 13a. The third fitted component 13c extends from the second fitted component 13b to the step side of the first fitted component 13a, and is further bent toward the opening in the vicinity of the step. . Finally, the groove 13d is formed in a groove shape in parallel with the wall plate 10 between the lower surface of the second fitted component 13b and the lower surface of the third fitted component 13c shown in FIG. It is bent into a groove shape recessed in the opposite opening side.

  The end portions extending from the projecting portions 12d and the groove portions 13d are bent in the direction perpendicular to the wall plate 10 and bent outward at the four sides of the cylindrical opening end shown in FIG. The fitting side flange part 12e and the to-be-fitted side flange part 13e for connection are each provided. The fitting-side flange portion 12e and the fitted-side flange portion 13e are provided with the bolt 2 insertion holes shown in FIG. 2 in order to insert and connect the bolt 2 (see FIG. 5) when the duct 1 is connected. 12f and 13f are each opened in the center.

  Moreover, since the wall board 10 is a fixed board thickness in the bending part of the 1st-3rd fitting components 12a-d and the 1st-3rd to-be-fitted components 13a-d shown in FIG. As shown in FIG. 3, it is folded in a state where it is crushed with almost no gap between the folded top and bottom. That is, the opening end portion of the wall plate 10 is folded and formed so as to be crushed almost like a single steel plate, thereby ensuring sufficient strength. Thereby, it has sufficient intensity | strength also with respect to loads, such as an earthquake, and can match | combine so that the protrusion part 12d and the groove part 13d may not remove | deviate easily.

  Further, as shown in FIG. 1, plate-like and L-shaped corner pieces 20 are inserted into the fitting-side flange portion 12 e and the fitted-side flange portion 13 e to reinforce the four corners of the opening end portion of the duct 1. It is supposed to be. The corner piece 20 has a hole 20a so that the corner piece 20 can be fixed via the bolt 2 as in the prior art. That is, in this embodiment, the bolts 2 are fixed by the holes 12f and 13f (see FIG. 2) between the fitting side flange portion 12 and the fitting side flange portion 13, and the four corners of the duct 1 are formed by the holes 20a of the corner piece 20. It is securely fixed by the bolt 2 fixing, and the clip which has been conventionally required is unnecessary.

  At this time, the fitting-side flange portion 12e is formed with a width D1a into which the corner piece 20 is inserted, as shown in FIG. The width D1a is formed by adjusting the folding position on the fitting flange portion 12e side and the folding position on the second fitting component portion 12b side. On the fitting side flange portion 12e side, the end surface 12e-1 having a width D3a is formed by bending the tip extending from the protruding portion 12d with a length of the width D2a at a substantially right angle, and the width D4a is further bent to the opposite side. Tip portion 12e-2. And when this front-end | tip part 12e-2 is bent, it adjusts so that an edge part may be in the position of the width | variety D1a. Further, the second fitting component 12b side is adjusted so that the end bent from the first fitting component 12a to the opposite side is positioned at the width D1a. That is, the corner piece 20 inserted into the width D1a is positioned by the bent end portion of the tip end portion 12e-2 and the second fitting component portion 12b.

  The dimensions of the widths D1a to D5a are set such that the width D2a is about 36 mm, the width D3a is about 8.5 to 9 mm, and the width D4a is about 4 mm, thereby setting the width D1a to about 2 to 3 mm. It is preferable. The length (width) D5a from which the protruding portion 12d protrudes is preferably set to about 12 mm.

  On the other hand, as shown in FIG. 3B, a width D1b into which the corner piece 20 is inserted is also formed in the fitted side flange portion 13e. The width D1b is formed by adjusting the folding position on the fitted flange portion 13e side and the folding position on the second fitted component 13b side. The fitted flange portion 13e side has an end surface 13e-1 having a width D3b formed by bending a tip extending from the groove portion 13d with a length of the width D2b substantially at a right angle, and the tip is further bent to the opposite side. D4b has a tip portion 13e-2. And when this front-end | tip part 13e-2 is bent, it adjusts so that an edge part may be in the position of the width | variety D1b. Further, the second fitted component 13b side is adjusted so that the end bent from the first fitted component 13a to the opposite side is positioned at the width D1b. That is, the corner piece 20 inserted into the width D1b is positioned by the bent end portion of the tip portion 13e-2 and the second fitting component portion 13b.

  The dimensions of the widths D1b to D5b are set such that the width D2b is about 36 mm, the width D3b is about 8.5 to 9 mm, and the width D4b is about 4 mm, thereby setting the width D1b to about 2 to 3 mm. It is preferable. Further, the depth (width) D5b in which the groove 13d is recessed is preferably set to about 15 mm.

  As described above, in the present embodiment, not only the protruding portion 12d and the groove portion 13d are bent so as to have sufficient strength, but also new widths D1a and D1b are formed by the bending so that the corner piece 20 can be fixed. Is formed.

  Next, the operation | movement which connects the ducts 1 using the duct connection structure which consists of such a structure is demonstrated in detail with reference to FIG. 4A and 4B are assembly views showing a state where the duct 1 shown in FIG. 1 is assembled. FIG. 4A shows the mating portion 12 side, and FIG. 4B shows the mating portion 13 side. FIG. 5 is a perspective view showing an operation of connecting the duct 1 of FIG.

  First, the wall plates 10 shown in FIG. 1 are arranged in four directions, and the joining portions 11 such as goby adjacent to each side of the wall plate 10 are joined and developed into a cylindrical shape. At this time, by inserting the corner piece 20 shown in FIG. 1 into the widths D1a and D1b between the fitting side flange portion 12e and the fitted side flange portion 13e shown in FIG. Attach to each corner. Here, after the corner piece 20 is inserted into the widths D1a and D1b between the fitting side flange portion 12e and the fitting side flange portion 13e, the corner piece 20 is bonded with a putty for the duct 1, and the like. It is each fixed to the to-be-fitted side flange portion 13e.

  As shown in FIG. 4, the duct 1 assembled by arranging the wall plates 10 in four directions in this way is provided with corner pieces 20, fitting-side flange portions 12 e, and projecting portions 12 d on the four sides of the cylindrical opening end. The fitted flange portion 13e and the groove portion 13d are arranged to form a duct connection structure. Here, as shown to Fig.4 (a), the protrusion part 12d is arrange | positioned so that it may protrude in the shape of a rib from the inner peripheral four sides of the opening edge part in which the fitting side flange part 12e is arrange | positioned. On the other hand, as shown in FIG. 4 (b), the groove 13d has a concave groove extending along the inner peripheral four sides of the opening end where the fitted side flange 13e is arranged so as to surround the periphery of the opening. Be placed. Thereby, the assembly of the duct 1 provided with the duct connection structure according to the present embodiment is completed.

  Next, the operation of connecting the duct 1 by the duct connection structure thus configured will be described in detail. First, as shown in FIG. 4, a pair of ducts 1 is prepared in which a protruding portion 12d of the fitting-side flange portion 12e and a groove portion 13d of the fitted-side flange portion 13e are provided. And as shown in FIG. 5, it arrange | positions so that the fitting side flange part 12e and the to-be-fitted side flange part 13e may face | match via a gasket (not shown).

  After that, the projecting portion 12d and the groove portion 13d at the opening end of the pair of ducts 1 are aligned so as to be joined at the four sides of the opening end at which the duct 1 is abutted, and are joined together. Let As a result, the positions of the holes 12f and 13f of the fitting-side flange portion 12e and the fitted-side flange portion 13e are matched and fixed by the bolt 2 and the nut 3. At the same time, the holes 20a of the L-shaped corner piece 20 mounted at the four corners of each flange portion are also matched and fixed by the bolt 2 and the nut 3. As a result, the pair of ducts 1 are connected to each other, and by repeating the connection process using this duct connection structure, the duct 1 having a certain length is assembled, and the duct connection work is completed. Thereafter, the duct 1 connected to the predetermined length is carried to a predetermined installation place and installed.

  As described above, according to the duct 1 and the duct connection structure, one convex fitting portion 12 (protruding portion 12d) in which the opening end portions of the ducts 1 are butted and the other concave fitting portion. 13 (groove portion 13d) are connected to each other and the ducts 1 are connected to each other. Therefore, even if an impact such as an earthquake is applied, a load is caused by the engagement between the fitting portion 12 and the fitted portion 13. Is suppressed and the corner piece 20 is not detached, and the displacement of the duct 1 connecting portion can be prevented.

  Further, according to the duct 1 and the duct connection structure, since the protruding portion 12d and the groove portion 13d are formed through the bent portion in which the opening end portion of the duct 1 is bent and reinforced, the strength is sufficient. It can withstand impacts such as earthquakes without deformation.

  Further, according to the duct 1 and the duct connection structure, the bolts 2 are formed in the holes 12f and 13f of the fitting side flange portion 12e and the fitted side flange portion 13e that come into contact with the fitting of the protruding portion 12d and the groove portion 13d. Therefore, it is possible to reliably prevent the corner piece 20 from being detached and the duct 1 from being displaced.

(Embodiment 2)
FIG. 6 is a perspective view showing the duct 100 according to this embodiment. This embodiment is different from the first embodiment in that a fitting portion 130 and a fitted portion 140 are formed on the flange portion 120 of each wall plate 110.

  That is, as shown in FIG. 7, flange portions 120 extending outward from the opening edge perpendicularly to the wall plate 110 are formed at both ends of the wall plate 110, and the flange portions 120 are formed on one flange portion 120. A convex fitting portion 130 that is bent and extends along the edge of the opening is formed. Specifically, the flange portion 120 is folded and fitted so that the cross-section becomes an inverted U shape protruding outward (on the opposite wall plate 110 side), and the inverted U shape extends along the longitudinal direction of the flange portion 120. A joint portion 130 is formed.

  On the other hand, a concave fitted portion 140 is formed on the other flange portion 120 by bending the flange portion 120 and extending along the opening edge. Specifically, the flange portion 120 is bent so that the cross-section becomes a U-shape projecting inward (on the wall plate 110 side), and this U-shape extends along the longitudinal direction of the flange portion 120. 140 is formed. And the fitting part 130 and the to-be-fitted part 140 are formed so that the fitting part 130 may be fitted in the to-be-fitted part 140.

  Further, in this embodiment, the corner piece 20 attached between the flange portions 120 on the fitting portion 130 side has the same configuration as that of the first embodiment, but is attached between the flange portions 120 on the fitting portion 140 side. The corner piece 150 is different in configuration as shown in FIG. That is, the corner recess 151 is formed in the two arm portions 150a extending at right angles. The corner recess 151 has a U-shaped cross section and extends along the longitudinal direction of the arm portion 150a. The corner recess 151 is formed so that the fitted portion 140 is fitted in the corner recess 151.

  In order to connect the ducts 100 to each other, the corner pieces 20 and 150 are attached between the flange parts 120, and the fitting part 130 of one duct 100 is fitted to the fitting part 130 of the other duct 100 as shown in FIG. Fit into the joint 140. Then, as in the first embodiment, the opposing corner pieces 20 and 150 are fastened with bolts and nuts, and the opposing flange portion 120 is fastened with bolts and nuts.

  Thus, according to this embodiment, the ducts 100 are connected with each other in a state where the convex fitting part 130 and the concave fitting part 140 are fitted, as in the first embodiment. Even when an external force / impact is applied due to an earthquake or the like, the connection between the ducts 100 can be prevented from being shifted or disconnected. In addition, since the fitting portion 130 and the fitted portion 140 are formed on the flange portion 120 protruding outward, the fitting portion 130 and the fitted portion 140 are easily visible from the outside, and the fitting portion 130 and the covered portion 140 are covered. The fitting with the fitting portion 140 can be easily and quickly performed, and the workability is improved.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, 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-described embodiment, the structure in which the projecting portions 12d and the grooves 13d are respectively arranged on both sides of the cylindrical opening end portion of the duct 1 is described. It is also possible to form only one of the protruding portion 12d or the groove 13d on either side of the cylindrical opening end depending on the situation (for example, the last opening end where the duct 1 is long connected). .

  Further, the protruding portion 12d and the groove 13d are not limited to being provided on the entire circumference of the four sides of the opening end portion of the duct 1, and for example, provided on only the upper and lower sides or the left and right sides according to the load application condition. Is also possible.

DESCRIPTION OF SYMBOLS 1 Duct 2 Bolt 3 Nut 10 Wall board 11 Joint part 12 Joint part 12a 1st fitting structure part 12b 2nd fitting structure part 12c 3rd fitting structure part 12d Protrusion part 12e Fitting side flange part 12f Hole 13 Mated portion 13a First fitted component 13b Second fitted component 13c Third fitted component 13d Groove portion 13e Fitted side flange portion 13f Hole 100 Duct 110 Wall plate 120 Flange part 130 fitting part 140 fitted part 150 corner piece

Claims (3)

Wall plates are arranged in four directions, and ducts formed so that flanges extending perpendicularly to the wall plate from the opening edge protrude outwards so that the opening ends touch each other. A duct connection structure to connect,
At one end of the flange portion of one duct, one straight portion that is bent along the opening edge of the flange portion, a folded portion at the tip of the one straight portion, and the opening edge from the folded portion A convex fitting portion provided with the other straight portion extending toward the flange portion along the line,
At the root of the flange portion of the other duct, one straight line portion that is bent along the opening edge by bending the flange portion, a folded portion at the tip of the one straight portion, and the opening edge from the folded portion And the other straight line portion extending toward the flange portion along the concave portion to be fitted,
A bolt insertion hole is opened at the center of the flange portion of the one duct and the flange portion of the other duct,
The duct connection structure characterized in that the one duct and the other duct are connected by fitting the fitting part into the fitted part. The duct connection structure includes a corner piece attached between two orthogonal flange portions of the other duct,
The corner piece includes two arm portions extending at right angles, and two corner concave portions extending along the longitudinal direction of the arm portion by bending the arm portion, and two orthogonal flanges of the other duct When fitted between the parts, the mated part is fitted into the corner recess,
The duct connection structure according to claim 1. The duct is formed in a cylindrical shape in which wall plates are arranged in four directions, and flange portions extending perpendicularly to the wall plates from the opening edges of both ends project outward.
At the base of one of the flange portions , one straight line portion that is bent along the opening edge by bending the flange portion, a folded portion at the tip of the one straight portion, and from the folded portion along the opening edge And a convex fitting portion provided with the other straight portion extending toward the flange portion,
At the root of the other flange portion , one straight line portion that is bent along the opening edge by bending the flange portion, a folded portion at the tip of the one straight portion, and from the folded portion along the opening edge And the other straight part extending toward the flange part is formed with a concave mating part,
Bolt insertion holes are opened at the center of the one flange portion and the other flange portion,
The duct, wherein the fitting portion can be fitted into the fitted portion.

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