JP2010139204A - Folding-type elbow duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding-type elbow duct having smooth flowing of air and easy assembly. <P>SOLUTION: The folding-type elbow duct includes a first wall plate 1 and second wall plate 2 of substantially fan shape, a third wall plate 3 disposed along a circular arc being outer rims of the first wall plate 1 and the second wall plate 2, and a fourth wall plate 4 disposed along bottom edges of the first wall plate 1 and the second wall plate 2. The first wall plate 1 and the second wall plate 2 are halved into circular arc plates 11, 21 and trapezoid plates 12, 22 in a straight line connecting one end and another end of the circular arc, and the trapezoid plates 12, 22 are turnable in joints S1, S2 with the circular arc plates 11, 21. The first wall plate 1 and the fourth wall plate 4, and the second wall plate 2 and the fourth wall plate 4 are turnable in their joints S3, S4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foldable duct that can be folded, and particularly to a foldable elbow duct whose axis is bent in an arc shape.

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). This foldable duct is, for example, configured in a cylindrical shape with four wall plates, and a corner portion that is a joint portion between the wall plates and the wall plates is rotatable. Then, the entire corner portion can be rotated (flattened) so that the wall plates overlap each other, and the corner portion can be rotated from the folded state to be developed into a cylindrical shape. When such a foldable duct is applied to an elbow duct whose axis is bent in an arc shape (for example, L-shaped), the structure is as shown in FIG. That is, the elbow duct 100 is configured by connecting the first duct 101 extending horizontally and the second duct 102 extending vertically by the third duct 103 extending obliquely. Here, each of the ducts 101 to 103 is a rectangular duct having a rectangular cross section, and can be folded by turning a corner.
JP 2004-003821 A

  By the way, in the conventional folding elbow duct 100, since it is comprised from the three straight cylindrical ducts 101-103, the flow of air is not smooth. That is, for example, when air flows in from the first duct 101 side, the inflowed air is guided along the third duct 103 to the second duct 102 side, but the third duct 103 extends obliquely and straightly. Therefore, when the air changes the flow direction, the resistance of the air in the third duct 103 is large. As a result, smooth air flow may be hindered, and vibration noise may be generated. Further, since the elbow duct 100 must be assembled by assembling the three ducts 101 to 103, much time and labor are required for the assembling work.

  Accordingly, an object of the present invention is to provide a foldable elbow duct that allows smooth air flow and is easy to assemble.

  In order to achieve the above object, the invention described in claim 1 is characterized in that a first wall plate having a substantially fan shape and a base is straight, and has the same shape as the first wall plate and faces the first wall plate. A second wall plate, a third wall plate arranged along an arc that is an outer edge of the first wall plate and the second wall plate, and the first wall plate, A fourth wall plate disposed along the bottom side of the second wall plate, wherein the first wall plate and the second wall plate are formed at one end side and the other end side of the arc. The arcuate plate on the arc side and the trapezoidal plate on the base side are divided into two in a straight line connecting the arcuate plate, the trapezoidal plate is rotatably disposed at the joint with the arc plate, and the first wall plate and the fourth plate The foldable elbow duct is characterized in that the wall plate and the second wall plate and the fourth wall plate are rotatably arranged at the joint portion.

  According to this invention, by rotating the trapezoidal plate of the first wall plate and the second wall plate so as to lie down, the fourth wall plate becomes the first wall plate and the second wall plate with this rotation. The whole wall plate is folded (flattened) so that the first wall plate, the second wall plate, and the fourth wall plate overlap each other on the third wall plate side. Further, by turning the trapezoidal plate of the first wall plate and the second wall plate to stand, the fourth wall plate becomes the first wall plate and the second wall plate along with the rotation. The first wall plate, the second wall plate, and the fourth wall plate are expanded in a cylindrical shape.

  According to a second aspect of the present invention, a first wall plate having a substantially fan shape and a straight base is provided, and a second wall plate having the same shape as the first wall plate and disposed opposite to the first wall plate. A wall plate, a third wall plate disposed along an arc that is an outer edge of the first wall plate and the second wall plate, and bases of the first wall plate and the second wall plate A fourth wall plate disposed along the first wall plate, the first wall plate and the second wall plate on the arc side in a straight line connecting one end side and the other end side of the arc. It is divided into an arc plate and a trapezoid plate on the bottom side, the trapezoid plate is rotatably disposed at a joint portion with the arc plate, and the fourth wall plate includes the first wall plate and the first wall plate. It is a foldable elbow duct characterized by being detachable with respect to 2 wall plates.

  According to this invention, the first wall plate and the second wall plate are removed by removing the fourth wall plate and rotating the first wall plate and the trapezoidal plate of the second wall plate to lie down. Folded to overlap the third wall plate side. Further, the first wall plate and the second wall plate are rotated so as to stand up, and the fourth wall plate is attached to the first wall plate and the second wall plate, so that the first wall plate The plate, the second wall plate, and the fourth wall plate develop in a cylindrical shape.

  According to a third aspect of the present invention, in the folding elbow duct according to the first or second aspect, at least one trapezoidal plate of the first wall plate and the second wall plate is divided into a plurality of parts, and the divided members are It is characterized in that the joint is rotatably arranged.

  According to the first aspect of the present invention, the first wall plate, the second wall plate, and the fourth wall plate are folded or formed into a cylindrical shape while the third wall plate extending along the arc is left as it is. Or can be deployed. That is, since a smooth circular arc shape is maintained, the flow of air can be smoothed, and the generation of vibration noise can be suppressed. In addition, it is not composed of a plurality of cylinders (ducts), and can be assembled into a cylinder simply by raising the trapezoidal plate of the first wall plate and the second wall plate. The labor is remarkably reduced.

  According to the second aspect of the present invention, as in the first aspect of the present invention, the third wall plate extending along the circular arc is maintained as it is and the smooth circular arc shape is maintained. Thus, the generation of vibration noise can be suppressed. Moreover, since it can be assembled into a cylindrical shape simply by raising the trapezoidal plate of the first wall plate and the second wall plate and attaching the fourth wall plate, the time and labor required for the assembly are significantly reduced. . And it can fold more compactly by removing a 4th wall board and stacking | stacking the trapezoid board of a 1st wall board and a 2nd wall board on a 3rd wall board alternately.

  According to the invention described in claim 3, the trapezoidal plate is divided into a plurality of parts, and the divided members are rotatable at the joint portion. Therefore, when the trapezoidal plate is large, the divided members are overlapped with each other. Can be folded compactly.

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

  FIG. 1 is a perspective view showing a foldable elbow duct 10 according to an embodiment of the present invention, and FIGS. 2 and 3 are a front view and a right side view of the foldable elbow duct 10. This foldable elbow duct 10 is an elbow duct whose axis is bent 90 degrees in an arc shape and changes the air flow by 90 degrees, and is a foldable duct. The foldable elbow duct 10 is mainly composed of the first wall plate 1 made of zinc iron plate and the like. 2 wall plates 2, a third wall plate 3, and a fourth wall plate 4.

  As shown in FIG. 3, the first wall plate 1 has a substantially fan shape with a deployment angle of 90 degrees and a base that is a straight line, and a circular arc plate 11 on the arc side in a straight line connecting one end and the other end of the arc. Divided into a trapezoidal plate 12 on the bottom side. The arc plate 11 has a substantially crescent shape and is joined to the third wall plate 3 along the arc as will be described later. The trapezoidal plate 12 is trapezoidal as shown in FIG. 4, and flanges 12a and 12b are formed on the hypotenuses, respectively. The trapezoidal plate 12 is rotatably disposed at a joint portion with the circular arc plate 11.

  Specifically, as shown in FIGS. 5 to 7, a curled single gob 11 a is formed along the bottom side of the arc plate 11 (side facing the arc), and the bottom side of the trapezoidal plate 12 (third A curl-shaped double goby 12c that engages with the single goby 11a is formed along the bottom side. The single goby 11a and the double goat 12c constitute a first spin goby S1. Here, the single gob 11a and the double gob 12c are located inside (cylinder inside) of the foldable elbow duct 10, and the outside is smooth.

  When the arc plate 11 and the trapezoid plate 12 are positioned on the same plane (see FIG. 5), when the trapezoid plate 12 is pushed toward the arc plate 11, the double gob 12c rotates around the single gob 11a, As shown in FIG. 6, the trapezoidal plate 12 is substantially perpendicular to the arc plate 11. When the trapezoidal plate 12 is further pushed toward the arc plate 11, the double gob 12c is similarly rotated, and the trapezoidal plate 12 becomes substantially parallel to the arc plate 11 as shown in FIG. On the other hand, when the trapezoidal plate 12 is moved away from the arc plate 11 from this state, the double gob 12c rotates and is substantially perpendicular to the arc plate 11 (see FIG. 6), and further, on the same plane as the arc plate 11 (See FIG. 5).

  Here, reference numeral 5 in the drawing is a rod-shaped (tube-shaped) gasket having a hollow cross section, which is made of an elastically deformable resin, seals between the single goby 11a and the double goat 12c, and from the first spin goze S1. It has a function to prevent air leakage. Moreover, the circular arc plate 11 and the trapezoidal plate 12 are detachable by the first spin gob S1. That is, with the single gob 11a and the double gob 12c engaged, the gasket 5 is removed and, for example, the trapezoidal plate 12 is engaged with the arc plate 11 along the direction of engagement (the direction perpendicular to the paper surface of FIGS. 5 to 7). To move. Thereby, the engagement between the single gob 11a and the double gob 12c is released, and the trapezoidal plate 12 is detached from the arc plate 11. Further, for example, the trapezoidal plate 12 is moved along the engagement direction with respect to the arc plate 11 while being engaged with the single goby 11a and the double gobe 12c. Thereby, the single goby 11a and the double goby 12c are engaged over the entire length, and the trapezoidal plate 12 is joined to the arc plate 11. The gasket 5 is inserted and attached between the single gob 11a and the double gob 12c thereafter.

  The second wall plate 2 has the same shape and the same structure as the first wall plate 1 and is disposed so that the plate surface faces the plate surface of the first wall plate 1. Here, the arc plate 21, the trapezoid plate 22, the flange portions 22a and 22b and the second spin gob S2 of the second wall plate 2 are respectively the arc plate 11, the trapezoid plate 12 and the flange portion 12a of the first wall plate 1. 12b and the first spin goby S1 will be described below.

  The third wall plate 3 is disposed along an arc whose plate surface is the outer edge of the first wall plate 1 and the second wall plate 2. That is, as shown in FIG. 8, one side edge (edge along the longitudinal direction) is joined to the arc edge of the arc plate 11 of the first wall plate 1, and the other side edge is the second wall plate 2. Are joined to the arc edge of the arc plate 21 and the plate surface is curved in an arc shape. Here, the third wall plate 3 and the arc plates 11 and 21 are joined (connected) to the arc plate 11 of the first wall plate 1 and the arc plate 21 of the second wall plate 2 by button punching. , Are configured integrally. Here, in this embodiment, such an integrated third wall plate 3 and arc plates 11 and 21 are referred to as a hull 6. Further, flange portions 3a and 3b are formed at both ends of the third wall plate 3, respectively.

  The fourth wall plate 4 is disposed along the bottom sides (inner edges) of the first wall plate 1 and the second wall plate 2. That is, it is substantially rectangular as shown in FIG. 9, one short edge is joined to the upper side of the trapezoidal plate 12 of the first wall plate 1, and the other short edge is the upper side of the trapezoidal plate 22 of the second wall plate 2. It is joined with. Moreover, the 1st wall board 1, the 4th wall board 4, the 2nd wall board 2, and the 4th wall board 4 are rotatably arrange | positioned in the junction part. That is, the third spin goby S3 is configured at the junction of the first wall plate 1 with the trapezoidal plate 12, and the fourth spin goze S4 is configured at the junction of the second wall plate 2 with the trapezoidal plate 22. (See FIG. 1). The third spin gob S3 and the fourth spin gob S4 have the same configuration as the first spin gob S1 and are rotated by the engagement of the single gob and the double gob as described above.

  Further, the fourth wall plate 4 is detachably attached to the first wall plate 1 and the second wall plate 2. That is, since the third spin goby S3 and the fourth spin goze S4 have the same configuration as the first spin goze S1, the first wall plate 1 can be obtained by engaging the single goby and the double goze as described above. And it attaches to the 2nd wall board 2, and it can remove from the 1st wall board 1 and the 2nd wall board 2 by releasing engagement.

  Further, flange portions 4 a and 4 b are formed at the longitudinal edges of the fourth wall plate 4, respectively. Here, when the flange portions 12a, 12b, 22a, 22b, 3a, 3b and 4a, 4b are assembled into a cylindrical shape as will be described later, the flange portions 12a, 22a, 3a, and 4a are on the same plane. The flange portions 12b, 22b, 3b, and 4b are formed so as to be arranged in a “B” shape on the same surface.

  Next, the conveyance method, installation method, etc. of the folding elbow duct 10 of such a structure are demonstrated.

  First, after assembling the wall plates 1 to 4 in a factory or the like, the foldable elbow duct 10 is folded in order to transport the foldable elbow duct 10 to an installation site (building site). That is, as shown in FIG. 10, the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2 are rotated so as to lie in the same direction with the spin goby S1 and 2 as base points. As a result, the fourth wall plate 4 rotates with respect to the first wall plate 1 and the second wall plate 2, that is, the spin goses S3, 4 rotate, and the trapezoidal plates 12, 22 and the fourth wall. The whole is folded (flattened) so that the plate 4 overlaps the hull 6 side. Or when it is necessary to fold more compactly, as shown in FIG. 11, the 4th wall board 4 is removed from the 1st wall board 1 and the 2nd wall board 2, and the 1st wall board 1 is removed. And the trapezoidal plates 12 and 22 of the second wall plate 2 are rotated so as to lie down and are alternately stacked on the hull 6 so that the trapezoidal plates 12 and 22 are folded so as to overlap the hull 6.

  In this folded state, the foldable elbow duct 10 is transported to the installation site by a truck or the like. Here, when the foldable elbow duct 10 is stored in a storage place at a factory or installation site, it is stored in a folded state as described above.

  Next, in order to install the foldable elbow duct 10 at the installation site, the foldable elbow duct 10 is assembled in an unfolded state. That is, when folded in the state of FIG. 10, the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2 are rotated so as to stand vertically with respect to the hull 6. Thereby, the 4th wall board 4 rotates with respect to the 1st wall board 1 and the 2nd wall board 2, and the 1st wall board 1, the 2nd wall board 2, and the 4th wall board 4 Expands into a cylindrical shape. On the other hand, when folded in the state of FIG. 11, the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2 are rotated so as to stand vertically with respect to the hull 6. In this state, by attaching the fourth wall plate 4 to the first wall plate 1 and the second wall plate 2, the first wall plate 1, the second wall plate 2, and the fourth wall plate 4 are Expand into a cylindrical shape.

  Subsequently, a substantially L-shaped corner piece 7 is attached to the four corners of the flange. That is, in the expanded state as described above, the flange portion 12a, 22a, 3a, and 4a forms a "B" -shaped flange, and the flange portions 12b, 22b, 3b, and 4b form the "B" shape. A shaped flange is formed. And as shown in FIG. 12, the unfolded state of the folding elbow duct 10 is maintained by attaching the corner pieces 7 to the four corners of these flanges. Thereafter, the folding elbow duct 10 is installed at a predetermined installation location and connected to other ducts.

  According to the foldable elbow duct 10 as described above, the first wall plate 1, the second wall plate 2, and the fourth wall plate 4 are folded while the third wall plate 3 extending in an arc shape is left as it is. Or can be expanded into a cylindrical shape. That is, since a smooth circular arc shape is maintained, the flow of air can be smoothed, and the generation of vibration noise can be suppressed. In addition, although the inner diameter side is planar due to the fourth wall plate 4, the air flowing into the folding elbow duct 10 flows toward the outer diameter side, that is, the third wall plate 3 side (by centrifugal force). Therefore, the wall plate 4 does not impede the smooth air flow.

Moreover, since the foldable elbow duct 10 becomes compact in a state where the foldable elbow duct 10 is folded, a space can be reduced during transportation and storage. In particular, since a large amount of the foldable elbow duct 10 can be loaded at a time during transportation by a truck or the like, transportation costs and CO ₂ emissions can be reduced. In addition, by removing the fourth wall plate 4 as shown in FIG. 11, it can be folded more compactly.

  Furthermore, it is not composed of a plurality of cylinders (ducts), and can be assembled into a cylinder simply by raising the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2. Therefore, the time and labor required for assembly are significantly reduced. Moreover, since the outer diameter is an arc shape and the arc is formed by the single third wall plate 3, a good appearance can be obtained.

  By the way, in the above embodiment, the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2 are composed of one member, but in order to fold more compactly, a plurality of members are used. You may comprise. For example, as shown in FIG. 13, the trapezoidal plate 12 of the first wall plate 1 is divided into two in a straight line parallel to the first spin goby S1, and the divided members 121 and 122 are joined by a spin goby to obtain the member 121, 122 can be rotated. Thereby, when the trapezoid board 12 is large, as shown in FIG. 14, the divided members 121 and 122 can be folded together more compactly. Here, only one of the trapezoidal plate 12 of the first wall plate 1 or the trapezoidal plate 22 of the second wall plate 2 may be divided, or both may be divided. In addition, when dividing only one side, it is necessary to remove the 4th wall board 4 at the time of folding.

  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 elbow duct whose axis is bent 90 degrees has been described. However, the elbow duct can be applied to an elbow duct bent 45 degrees, and can also be applied to an S-curved escan or a bent pipe. For example, in the case of an escan, as shown in FIG. 15, a foldable elbow duct 20 (a duct having the same configuration as the foldable elbow duct 10 described above and having a different bending angle on the axis) is disposed at both ends, and a straight straight duct is interposed between the foldable elbow ducts 20. 21 is arranged and formed so as to be S-shaped as a whole.

  Moreover, although the 1st wall board 1 and the 2nd wall board 2 are divided into 2 in the straight line which connects the one end part and other end part of a circular arc, the periphery of the one end part of a circular arc and the periphery of the other end part You may divide in the straight line which connects. Furthermore, the joint between the fourth wall plate 4 and the trapezoidal plate 12 of the first wall plate 1 and the joint between the fourth wall plate 4 and the trapezoidal plate 22 of the second wall plate 1 are not used as spin goby. The fourth wall plate 4 may be detachable only by making the rotation impossible. In this case, by removing the fourth wall plate 4, the trapezoidal plates 12 and 22 of the first wall plate 1 and the second wall plate 2 can be folded so as to overlap the hull 6. By attaching 4, the rotation of the trapezoidal plates 12 and 22 can be suppressed.

It is a perspective view which shows the folding elbow duct which concerns on embodiment of this invention. It is a front view of the folding elbow duct of FIG. It is a right view of the folding elbow duct of FIG. It is the top view (a), front view (b), and left view (c) of the trapezoid board of the 1st wall board of the folding elbow duct of FIG. It is a figure which shows the spin goby in the foldable elbow duct of FIG. 1, and shows a state where the arc plate and the trapezoid plate are located on the same plane. FIG. 6 is a diagram showing a state in which the trapezoidal plate is positioned substantially perpendicular to the arc plate from the state of FIG. 5. It is a figure which shows the state from which the trapezoid board is located substantially parallel with respect to a circular arc board from the state of FIG. It is the front view (a) and right view (b) which show the hull of the folding elbow duct of FIG. It is the front view (a) and right view (b) which show the 4th wall board of the foldable elbow duct of FIG. It is the top view (a) and front view (b) which show the state which folded the foldable elbow duct of FIG. It is the top view (a) and front view (b) which show the state which removed the 4th wall board and folded the folding elbow duct of FIG. It is a figure which shows the state which attached the corner piece to the corner | angular part (corner) of the flange of the folding elbow duct of FIG. It is a figure which shows the state which divided the trapezoid board of the 1st wall board into 2 parts in embodiment of this invention. It is a figure which shows the state which overlaps the trapezoid board of FIG. They are the front view (a) and the right view (b) which show the state which applied this invention to the escan. It is the front view (a) and right view (b) which show the conventional elbow duct.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Folding elbow duct 1 1st wall board 11 Arc board 11a Single goby 12 Trapezoid board 12c Double goby 2 2nd wall board 21 Arc board 22 Trapezoid board 3 3rd wall board 4 4th wall board 5 Gasket 6 Hull 7 Corner piece S1-S4 Spin goby

Claims (3)

A first wall plate that is substantially fan-shaped and has a straight base; a second wall plate that has the same shape as the first wall plate and is disposed to face the first wall plate; and A third wall plate disposed along an arc that is an outer edge of the wall plate and the second wall plate, and a fourth wall plate disposed along the bottom sides of the first wall plate and the second wall plate. A wall board, and
The first wall plate and the second wall plate are divided into a circular arc plate on the arc side and a trapezoid plate on the bottom side in a straight line connecting one end side and the other end side of the arc, and the trapezoid plate Is rotatably arranged at the joint with the arc plate,
The foldable elbow duct, wherein the first wall plate, the fourth wall plate, and the second wall plate and the fourth wall plate are rotatably disposed at a joint portion thereof. . A first wall plate that is substantially fan-shaped and has a straight base; a second wall plate that has the same shape as the first wall plate and is disposed to face the first wall plate; and A third wall plate disposed along an arc that is an outer edge of the wall plate and the second wall plate, and a fourth wall plate disposed along the bottom sides of the first wall plate and the second wall plate. A wall board, and
The first wall plate and the second wall plate are divided into a circular arc plate on the arc side and a trapezoid plate on the bottom side in a straight line connecting one end side and the other end side of the arc, and the trapezoid plate Is rotatably arranged at the joint with the arc plate,
The foldable elbow duct, wherein the fourth wall plate is detachable from the first wall plate and the second wall plate. 2. The trapezoidal plate at least one of the first wall plate and the second wall plate is divided into a plurality of parts, and the divided members are rotatably arranged at the joints. The foldable elbow duct according to any one of 2 or 2.

Images