WO2000014454A1

WO2000014454A1 - Duct connecting device

Info

Publication number: WO2000014454A1
Application number: PCT/JP1999/004807
Authority: WO
Inventors: Masaro Yoshimura; Yukio Sakamura
Original assignee: Asia Pacific Corporation; Sakamura Seisakusho Co., Ltd.
Priority date: 1998-09-04
Filing date: 1999-09-06
Publication date: 2000-03-16
Also published as: JP2961369B1; AU5449299A; JP2000081243A

Abstract

A duct connecting device for connecting two duct opening edge parts to each other, comprising four joint plates (1) connected to each other through L-type connection members (2) so as to form a frame body, wherein the opening edge part of each duct is inserted into receiving grooves (4a) and (4b) for connection, whereby a space occupied by the installed ducts can be reduced because a cover part (7) in flat plate shape is positioned on the outer surface of the duct and, therefore, any member will not project from the duct unlike the conventional flange.

Description

Description Duct connection device Reference to related application

The entire disclosure of Japanese Patent Application No. 289938 (filed on Sep. 4, 1998), including the specification, claims, drawings and abstract, is incorporated herein by reference in their entirety. Merged into spikelets. Technical field

The present invention relates to a duct connection device, and more particularly to a duct connection device that facilitates connection work and can reduce an installation space of the duct. Background art

Buildings are often provided with ducts for guiding gases such as air and smoke. Multiple ducts are connected and installed according to the overall installation length and installation space in the building.

Fig. 21 shows the first prior art of the duct connection device. Angle flanges 83 and 84 are fixed to the openings の of the ducts 81 and 82 to be connected by rivets and screws, respectively. A gasket 89 is interposed between the angled flanges 83, 84, passed through a number of holes formed in the angled flanges 83, 84, and the gasket 89, and is bolted, nutd, or the like. G1 and 82 are connected and fixed. Figures 23A and 23B show the second conventional technology of the duct connection device. At the openings の of the ducts 81, 82 to be connected, common plate flanges 85, 86 formed by bending the edges of the duct outward are provided.

A gasket 89 is interposed between the common plate flanges 85, 86, and L-shaped brackets 85, 86K are mounted on the back side of the corners of the common plate flanges 85, 86. Fix the four corners with ports, nuts, etc. After that, clamps 87 hold sandwich flanges 85 and 86 (Fig. 23B). Further, FIGS. 24A and 24B show a third related art of the duct connection device. This connecting device is used for connecting cylindrical ducts 71 and 72. The bulge 73 has a bulge 73a at the center, and the flats 73b located on both sides of the bulge 73a are inserted into the ducts 71 and 72, respectively. Secure with rivets 74 (see Figure 24B).

Figure 25 shows the fourth prior art of the duct connection device. Fig. 25 is a cross-sectional view of the connection part of the duct. Bent portions 75 and 76 that are bent outward are formed at the opening edges of the ducts to be connected.

Then, an engaging portion 79 is attached to the bent portions 75 and 76. The engaging portion 79 is formed with engaging bent portions 77 and 178. The engaging bent portions 77 and 78 are engaged with the bent portions 75 and 76 of the duct. Connect.

Each of the above prior arts has the following problems. First, in the first conventional technique shown in FIG. 21, it is necessary to fix the angle flanges 83, 84 with a large number of ports and nuts, and there is a problem that the work of connecting the duct is troublesome. In order to increase the connection strength, the angle flanges 83 and 84 are made of thick iron plate, which is heavy and requires a lot of labor to transport and install the duct. There are also problems.

Furthermore, since the angle flanges 83, 84 protrude outside the duct, when the duct is installed along the wall, the protrusion of the angle flanges 83, 84 causes the duct and It is necessary to provide a large space between the wall and the wall, which increases the space occupied by the installed duct.

In particular, since the angle flanges 83 and 84 need to be fixed in the circumferential direction with a large number of bolts and nuts, the ducts must be arranged with a sufficient working space for this bolting work. However, the space for installation is further increased. For example, for a duct used for air conditioning equipment, a heat insulating material 70 is wound around the entire duct for heat insulation as shown in FIG. In this case, since the angle flanges 83 and 84 protrude outside the duct, the thickness L 9 of the entire heat insulating material 70 increases, and the space occupied by the duct further increases. .

In contrast, the second prior art shown in FIGS. 23A and 23B, The work is improved compared to the first prior art, but is similar to the first prior art in that the common plate flanges 85, 86 protrude outside the duct. In other words, there is a problem that the installation space of the duct becomes large due to the coplanar flanges 85 and 86, and when the heat insulating material is wound (see Fig. 22), the space occupied by the duct further increases. is there.

In the third prior art shown in FIGS. 24A and 24B, since the duct 71 and the duct 72 are connected using the annular band 73, a member such as a flange is provided outside the duct. Does not protrude, and the space occupied by the duct can be reduced. However, the third conventional technique has the following problems.

When the ducts 71 and 72 are to be connected to each other, there may be a displacement between the opening edge of the duct 71 and the opening 緣 of the duct 72. When the ducts 71 and 72 in such a state are connected by the annular band 73, there is a problem that a gap is formed between the opening edges of the ducts 71 and 72 and the annular band 73.

The duct is made of a thin metal plate to reduce the weight, and the openings の of the ducts 71 and 72 may be slightly curved. Even in such a case, a gap is formed between the opening edges of the ducts 71 and 72 and the annular band 73.

If a gap is formed between the opening edges of the ducts 71 and 72 and the annular band 73 in this way, the air inside the duct installed flows out of the gap and the air inside and outside the duct There is a problem that the barrier property cannot be secured.

In the fourth prior art shown in FIG. 25, the ducts are connected by engaging the engaging bent portions 77, 78 of the engaging portion 79 with the bent portions 75, 76 of the duct. Therefore, as in the third prior art, a gap may be formed between the opening edge of the duct and the engaging portion 79, and the air blocking performance between the inside and outside of the duct may be reduced. There is a problem that it cannot be secured. Disclosure of the invention

The present invention solves the above-mentioned problems, reduces the work required for connecting the ducts, can reduce the space occupied by the ducts that are erected, and furthermore, reduces the air blocking performance inside and outside the ducts. The purpose is to provide a duct connection device that can be secured. The duct connection device according to the present invention comprises:

In a duct connecting device for connecting the opening edges of two ducts arranged along a predetermined arrangement direction,

A connecting portion composed of an inner flat portion, an outer flat portion, and an intermediate portion, wherein the inner flat portion has a substantially flat shape, and extends along an opening edge of the two ducts. The flat surface is located inside the duct, parallel to the inner surface of the duct, and close to or in contact with the inner surface of the duct;

The outer flat surface has a substantially flat shape, and is located outside the duct along an opening edge of the two ducts, and the flat surface is parallel to the outer surface of the duct, and Close to or in contact with the outer surface of

The intermediate portion is located between the opening edges of the two ducts, and integrally connects the inner flat portion and the outer flat portion.

It is characterized by:

Further, the duct connecting device according to the present invention includes:

In a duct connection device that connects the openings of two ducts,

On both sides, there is a connection part with an insertion groove into which the openings of the two ducts are inserted.

By inserting the openings into the insertion grooves on both sides of the connecting portion, the opening edges of the two ducts are sandwiched and connected.

It is characterized by:

Although the features of the present invention can be broadly shown as described above, the structure and contents thereof, together with the objects and features thereof, will become more apparent from the following disclosure, taking into consideration the drawings. .

A duct connecting device according to claim 1 of the present application includes a connecting portion including an inner flat portion, an outer flat portion, and an intermediate portion. The inner flat portion has a substantially flat shape, is located inside the duct along the opening edge of the two ducts, and the flat surface is parallel to the inner surface of the duct, And it is close to or in contact with the inner surface of the duct.

As described above, the inner flat portion has a flat shape and is close to the inner surface of the duct. Since they are located in contact with each other, the flow of gas in the duct is not hindered, and an appropriate gas flow can be ensured. '' Also, the outer flat surface has a substantially flat shape, is located outside the duct along the opening of the two ducts, and the flat surface is parallel to the outer surface of the duct, It is close to or in contact with the outer surface of the duct.

As described above, since the outer flat portion has a flat shape and is close to or in contact with the outer surface of the duct, a member such as a flange does not protrude to the outside of the duct. Space can be reduced and the space occupied by the installed duct can be kept small.

Therefore, for example, even when the heat insulating material is wound around the outside of the duct, the heat insulating material can be made thinner because the members such as the flanges do not protrude outside, and the occupied space of the installed duct is reduced. Can be smaller.

Further, the intermediate portion is located between the inner flat portion and the outer flat portion, and integrally connects the inner flat portion and the outer flat portion. As described above, since the inner flat portion and the outer flat portion are integrally connected by the middle portion, by inserting the opening portion of the duct between the inner flat portion and the outer flat portion, The opening edge can be sandwiched and held between the inner flat portion and the outer flat portion.

Therefore, it is possible to correct the positional deviation between the opening edges of the two ducts and to prevent a gap from being formed between the opening edge and the connecting portion. For this reason, it is possible to secure the shutoff property of the air inside and outside the duct and to prevent the gas inside the duct from flowing out of the gap.

In addition, since the connecting portion can be attached by inserting the opening portion of the duct between the inner flat portion and the outer flat portion, the work of connecting the duct is not troublesome and the work efficiency is improved. Can be Furthermore, since the connecting portion has a simple configuration in which the inner flat portion and the outer flat portion are connected by the intermediate portion, labor for transporting and installing the duct-to-connecting portion can be reduced.

Further, in the duct connection device according to claim 2 of the present invention, the width of the inner flat portion in the disposition direction is larger than the width of the outer flat portion in the disposition direction, and the screw portion has a duct. And screwed into the inner flat part. In this manner, the duct and the inner flat portion of the connection portion are fixed by the screw portion, so that the two ducts can be reliably connected. For this reason, for example, it is possible to more reliably ensure the air blocking performance inside and outside the duct.

In addition, the thickness of the duct plate forming the duct at one end is thin in order to reduce the weight of the duct, and the inner flat portion of the connection portion is often thicker. As described above, the screw portion penetrates the thin duct and is screwed into the thick inner flat portion, so that the screw portion is securely fixed to the inner flat portion.

In the duct connecting device according to claim 3 of the present application, a quick connection target portion is formed at one end of the connection portion, and the connection target portion is formed at the other end of the connection portion. An integral connecting portion is formed, which is connectable to the connecting portion and is integrally provided at the other end of the connecting portion.

Therefore, by connecting the integrated connection portion to the connection target portion, one end and the other end of the connection portion can be connected. In this case, a single connecting portion can be bent, and one end and the other end of the connecting portion can be connected. In addition, a plurality of connecting portions can be prepared, and one end and the other end of each of the connecting portions adjacent to each other can be quickly connected. Therefore, it is possible to cope with various shapes of the opening 緣 of the duct.

The term "connection" in this claim means, in addition to the connection by insertion described in claim 4 below, the connection by abutting, the fixing of rivets, ports, welding, adhesives, etc. Various means of connection such as a method of connecting by means of a means and a method of connecting by engaging an engagement portion with an engagement target portion can be used.

In the connection device for a duct according to claim 4 of the present application, the connection target portion is a connection space, and the integrated connection portion is an integrated connection piece inserted into the connection space. . Therefore, one end and the other end of the connection portion can be easily and reliably connected only by inserting the integrated connection portion into the connection space.

In the connection device for a duct according to claim 10 of the present invention, connection target portions are formed at both ends of the connection portion. The separate connection portion is connectable to the two connection target portions, and is configured separately from the connection portion. Therefore, by connecting the two connection target parts using the separate-type connection part, one end and the other end of the connection part can be connected. In this case, the connecting portion of the leather 1 may be curved, and one end and the other end of the connecting portion may be connected. In addition, a plurality of connecting portions can be prepared, and one end and the other end of each of the connecting portions adjacent to each other can be connected. Therefore, it is possible to cope with various shapes of the opening portion of the duct.

The term "connection" in this claim means, in addition to the connection by insertion described in claim 11 below, the connection by abutting, rivets, bolts, welding, adhesives, etc. Various connecting means can be used, such as connecting by using the fixing means of the above, or connecting by connecting the engaging portion to the engaging target portion.

In the duct connection device according to claim 11 of the present application, the connection target portion is a connection space, and the separate connection portion is a separate connection piece inserted into the connection space. is there.

Therefore, one end and the other end of the connection portion can be easily and reliably connected only by inserting the separate connection portion into the connection space.

In the duct connecting device according to claims 5 and 12 of the present application, the connecting portion is formed by bending a single metal plate. As described above, since the connection portion can be obtained by bending the metal plate, the manufacturing efficiency of the connection portion can be improved.

In the duct connection device according to claims 6 and 13 of the present application, the connection portion is formed by combining and fixing a plurality of processed gold bending plates. As described above, since the connection portion can be obtained by combining and fixing a plurality of metal plates, the manufacturing efficiency of the connection portion can be increased. In the duct connection device according to claims 7 and 14 of the present application, the length of the inner flat portion in the edge direction of the opening of the duct is equal to the length of the edge of the opening of the duct. Is shorter than the length of the outer flat portion.

As described above, since the inner flat portion is shorter than the outer flat portion, if the tangential convex portion formed to form the duct is located inside the opening の of the duct, the connecting convex portion is formed. The inner flat portion can be located avoiding the portion.

In addition, since the outer flat part is longer than the inner flat part, it is possible to sufficiently cover the outside of the duct, secure the air-tightness inside and outside the duct, and allow the gas inside the duct to flow out of the gap Can be reliably avoided.

In the connecting device for a duct according to claim 8 of the present application, the integrated connecting piece is provided integrally on the inner flat portion of the connecting portion, and the integrated connecting piece includes the duct. Is formed to bend inward. By forming the bent portion on the integral connection piece in this manner, the integral connection piece can be positioned avoiding the connection protrusion inside the duct.

In the connecting device for a duct according to claim 9 of the present application, the integrated connecting piece is provided integrally on a flat portion inside the connecting portion, and the integrated connecting piece is provided inside the duct. It is provided so that it may be located away from. Since the integrated connecting piece is located away from the inside of the duct in this way, the integrated quick connecting piece can be positioned avoiding the connection protrusion inside the duct.

In the duct connection device according to claim 15 of the present application, the connection space is formed in the flat portion inside the connection portion, and the separate connection piece is inserted into the connection space. When this is done, a bent portion is formed that is bent toward the inside of the duct. By forming the bent portion on the separate-type connecting piece in this manner, the separate-type connecting piece can be positioned avoiding the connection protrusion on the inner side of the duct.

In the duct connecting device according to claim 16 of the present application, the connecting space is formed in a flat portion inside the connecting portion, and the separate connecting piece is inserted into the connecting space. Sometimes, it is provided to be located away from the inside of the duct. Since the separate connecting piece is located away from the inside of the duct in this way, the separate connecting piece can be positioned avoiding the connection projection on the inner side of the duct.

The duct connecting device according to claim 17 of the present application includes connecting portions on both sides of which are formed insertion grooves into which the opening portions of the two ducts are inserted. Then, by inserting the openings into the insertion grooves on both sides of the connection portion, the opening edges of the two ducts are sandwiched and connected.

Therefore, the misalignment of the openings of the two ducts is corrected, and the opening edge and the connection Can be prevented from forming a gap between them. For this reason, it is possible to ensure the air shielding property inside and outside the duct and to prevent the gas inside the duct from flowing out of the gap.

Further, since the connection portion can be attached by inserting the opening portion of the duct into the insertion groove, the work of connecting the duct is not troublesome, and the work efficiency can be improved.

In the duct connection device according to claim 18 of the present application, the insertion groove formed in the connection portion has a size of an insertion opening portion into which the opening 緣 is inserted, and the inside of the insertion groove. It is formed larger than the size of. Therefore, the opening portion of the duct is guided from the insertion inlet portion toward the inside of the insertion groove, and the opening portion of the duct can be easily and reliably inserted into the insertion groove.

In the duct connecting apparatus according to claim 19 of the present application, at least one end of the connecting portion is provided with a connecting piece for connecting the one end to the other end. A space for connection that can be inserted is formed.

Therefore, one end and the other end of the connection portion can be connected by inserting the connection piece into the connection space. In this case, a single connecting portion may be curved, and one end of the connecting portion may be connected to the other end. Also, a plurality of connecting portions can be prepared, and one end and the other end of each of the connecting portions adjacent to each other can be connected. Therefore, it is possible to cope with various shapes of the opening 緣 of the duct. ■

In the duct connecting device according to claim 20 of the present application, the opening edges of the two ducts to be connected have a square shape. Then, the four connecting portions are connected by inserting the connecting piece into the connecting space to form a frame corresponding to the square shape of the opening 緣.

As described above, since the connection portion forms a frame band corresponding to the square shape and connects the opening portions of the duct, the opening edges of the square shape can be easily and reliably connected.

In the connecting device for a duct according to claim 21 of the present application, the connecting space has a flat shape parallel to the inner or outer surface of the duct, and the quick-connecting piece has the connecting space. It has a flat shape corresponding to the shape between them.

Thus, connecting the space and speed sintered piece, since it has a parallel ³ F Tankatachi shape to the inner surface or outer surface of the duct, connecting air閱and the connecting piece is positioned inside the duct If so, it is possible to avoid projecting into the duct. Therefore, the flow of gas in the duct is not hindered, and an appropriate gas flow can be secured. Further, when the connecting space and the connecting piece are located outside the duct, the installation space can be reduced, and the occupied space of the installed duct can be reduced.

In addition to the connection space, the shape of the entire connection portion may be a flat shape parallel to the inner or outer surface of the duct. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1A is a view for explaining a first embodiment of a duct connection device according to the present invention, and is a perspective view in a state where four joint plates 1 and an L-shaped connecting member 2 are disassembled, respectively. You.

FIG. 1B is a perspective view showing the joint plate 1 shown in FIG. 1A.

FIG. 2A is a side view of the joint plate 1 shown in FIG. 1A.

FIG. 2B is a perspective view showing a state where the connection frame 8 is configured by combining the joint plate 1 and the L-shaped connecting member 2 shown in FIG. 1A.

FIG. 3A is a perspective view showing a state in which ducts 11 and 12 are connected using connection frame 8 shown in FIG. 2B.

FIG. 3B is a cross-sectional view taken along the line XX shown in FIG. 3A.

FIG. 4 is a diagram showing a state where the heat insulating material 70 is wound around the connected ducts 11 and 12.

FIG. 5A is a diagram showing an opening portion of the joint plate 10.

FIG. 5B is an enlarged view of the vicinity of the in-duct protrusion 17 shown in FIG. 5A.

FIG. 6 is a diagram showing a connection state of a plurality of ducts.

FIG. 7 is a diagram for explaining the second embodiment of the duct connection and concealment according to the present invention, and is a perspective view in a state where four joint plates 1 are disassembled.

FIG. 8A is a view for explaining a third embodiment of the duct connection device according to the present invention. It is a figure and is a side view of the joint board 1. FIG.

FIG. 8B is a view for explaining the fourth embodiment of the duct connection device according to the present invention, and is a side view of the joint plate 1.

FIG. 8C is a view for explaining the fifth embodiment of the duct connection device according to the present invention, and is a side view of the joint plate 28.

FIG. 9 is a view for explaining a sixth embodiment of the duct connection device according to the present invention, and is an enlarged view of the vicinity of the in-duct protrusion 17.

FIG. 10 is a view for explaining the seventh embodiment of the duct connection device according to the present invention, and is a side view of the joint plate 41. FIG.

FIG. 11 is a perspective view of the joint plate 41 and the L-shaped connecting member 42 shown in FIG. FIG. 12A is an enlarged view of the vicinity of the in-duct protrusion 17 when the duct is connected using the joint plate 41 shown in FIG.

FIG. 12B is a diagram showing a slope quick-connecting member 5 having a different shape from the L-shaped connecting member 42 of FIG. 12A.

FIG. 13 is a diagram for explaining the eighth embodiment of the duct connection device according to the present invention, and is an enlarged view of the vicinity of the in-duct protrusion 17.

FIG. 14A is a side view of the joint plate 53 according to the eighth embodiment.

FIG. 14B is a view for explaining the ninth embodiment of the duct connection device according to the present invention, and is a side view of the joint plate 57.

FIG. 15A is a view for explaining the tenth embodiment of the duct connection device according to the present invention, and is a front view of the joint plate 1.

FIG. 15B is a side view of the joint plate 1 showing another embodiment.

FIG. 16 is a view for explaining the first embodiment of the duct connection apparatus according to the present invention, and is a perspective view showing the joint plate 100.

FIG. 17A is a side view of the joint plate 100 of FIG.

FIG. 17B is a plan view of FIG. 17A.

FIG. 17C is a plan view showing a state where two joint plates 100 are connected from the state of FIG. 17B.

FIG. 18 is a view for explaining a 12th embodiment of the duct connection apparatus according to the present invention. FIG. 19A is a side view showing a state in which a connecting arm 106 is provided instead of the connecting arms 103 and 104 in the first embodiment. are diagrams order to explain the first third embodiment of the duct of the connection device according to the invention, the bending plane portion 1 0 2 a, 1 0 each second abutting recesses 1 0 8 _a, 1 0 8 It is a side view which shows the joint board 100 in which b was formed.

FIG. 19B is a plan view of FIG. 19A.

FIG. 19C is a plan view showing a state where two joint plates 100 are connected from the state of FIG. 19B.

FIG. 20 is a view for explaining a fourteenth embodiment of the duct connection device according to the present invention, in which a joint plate 100 provided with an L-shaped bent portion 109 on a flat plate 101 is shown. FIG.

FIG. 21 is a perspective view showing a first related art of a duct connection device.

FIG. 22 is a diagram showing a state where the heat insulating material 70 is wound around the ducts 81 and 82 shown in FIG.

FIG. 23A is a perspective view showing a second prior art of a duct connection device.

FIG. 23B is a cross-sectional view of the vicinity of the clip 87 in FIG. 23A.

FIG. 24A is a perspective view showing a third conventional technique.

FIG. 24B is a cross-sectional view near the annular band 73 shown in FIG. 24A.

FIG. 25 is a sectional view showing a fourth conventional technique. BEST MODE FOR CARRYING OUT THE INVENTION

(1) First embodiment

A first embodiment of a duct connection device according to the present invention will be described below. FIG. 1A is a perspective view of a state where four joint plates 1 and the L-shaped connecting member 2 are disassembled, and FIG. 1B is a perspective view showing one joint plate 1. FIG. 2A is a side view of the joint plate 1, and FIG. 2B is a perspective view showing a state in which a joint frame 8 is configured by combining the joint plate 1 and the L-shaped connecting member 2 shown in FIG. 1A. .

FIG. 3A is a perspective view showing a state in which ducts 11 and 12 are connected using the connection frame 8 shown in FIG. 2B, and FIG. 3B is an arrow in the XX direction shown in FIG. 3A. FIG. Also, FIG. 4 is a diagram showing a state where the heat insulating material 70 is wound around the connected ducts 11 and 12. Further, FIG. 5A is a diagram showing an opening portion of the joint plate 10, and FIG. 5B is an enlarged view of the in-duct convex portion 17 as the connecting convex portion shown in FIG. 5A '. FIG. 6 is a diagram showing a connection state of a plurality of ducts.

As shown in FIG. 6, a plurality of ducts 11, 12, 13, 13, 14 and 15 are connected to adjacent ducts at their opening edges, and are erected on a building or the like. In the example shown in FIG. 6, ducts 11, 12, 13, and 15 except duct 14 are connected using a connection frame 8 described in detail below, and duct 14 is The connection is made using flange 21 as in the conventional duct connection device.

However, the connection frame 8 in the present embodiment may be used instead of the flange 21, and the duct 14 may be connected to the adjacent ducts 13 and 15 by the connection frame 8. In the present embodiment, an example is shown in which ducts whose opening edges are square are connected.

The length L6 (the length in the direction of the opening of the duct) in the joint plate 1 shown in FIG. 1B is slightly shorter than the length of one side of the opening of the duct. The joint plate 1 is formed by symmetrically bending a single metal plate from both sides.

This joint plate 1 is made of metal stamping, sheet metal bending, extrusion or drawing, roll forming, molding, curtain molding, other heating, non-heating, and non-pressing. The molding can be performed by using a general molding method.

By the bending process, flat portions 3 a and 3 b located inside the duct are formed on the joint plate 1, and the intermediate bent portions 3 ϋ a and 30 b bent from the flat portions 3 a and 3 b are formed. The plane portions 5a and 5b located outside the duct are formed through the holes. Further, the flat portions 5a and 5b are bent and connected to the cover part 7 at short intervals. The space surrounded by the flat portions 5a and 5b and the cover portion 7 is a flat space 6.

Based on FIG. 2A, the dimensions of each part in the connection axis 20 direction of the joint plate 1 will be exemplified. In the present embodiment, the joint plate 1 is configured using a metal plate having a thickness of about one thigh. Each width L 1 2, L 1 3 of the plane portions 3 a, 3 b is about 35 mm, and The distance L14 between the barbs 30a and 30b is approximately 3 thighs. Therefore, the entire width L 11 from the end of the flat portion 3a to the end of the flat portion 3b is about 73 ran.

The width L 15 of the cover 7 is about 40 mm, and the width of the flat gap 6 is about 38 mm obtained by subtracting the plate thickness on both sides from the width L 15 of the cover 7 about 40 mm. is there. The thickness L 18 of the flat gap 6 is about 1.5ππη, and the thickness L 17 of the receiving grooves 4a and 4b is about 1.5 lord. Therefore, the total thickness L 16 of the joint plate 1 is about 6 mm. The dimensions described above are examples in the present embodiment, and the size of the duct, the thickness of the duct plate, the thickness of the gold bent plate constituting the joint plate 1, the strength of the joint plate 1 and the manufacturing Different dimensions may be set in consideration of efficiency or the like.

The L-shaped connecting member 2 shown in FIG. 1A is for connecting the four joint plates 1 arranged in a square, respectively, and is configured separately from the joint plate 1. In FIG. 2, the L-shaped connecting member 2 is formed by bending a metal piece having a thickness of about 1 at a right angle. The width L 19 (FIG. 1A) of the L-shaped connecting member 2 is 35 to 37 thighs slightly shorter than the width of the flat gap 6.

As described above, since the thickness and width L 19 of the L-shaped connecting member 2 are slightly smaller than the thickness and width of the flat gap 6, the L-shaped connecting member 2 can be inserted into the flat gap 6. When the thickness L 19 of the L-shaped connecting member 2 is set to be smaller than the thickness and width of the flat gap 6 by 0.5 nm to several band (for example, about 1 to 3 wakes), the L-shaped connecting member can be smoothly. 2 can be inserted into the flat space 6, and the L-shaped connecting member 2 does not easily come off from the flat space 6.

When constructing the connection frame 8, the four joint plates 1 are arranged in a square as shown in FIG.1A, the L-shaped connecting members 2 are inserted into the respective flat gaps 6, and the adjacent joint plates 1 are connected to each other. connect. The connection work by the L-shaped connection member 2 is performed at the installation site. For this reason, space can be reduced when the connection frame 8 is stored or transported. Next, a procedure for connecting ducts using the connection frame 8 will be described with reference to FIGS. 3A and 3B. The connection between ducts 11 and 12 will be described below as an example. The opening edge of the duct 11 is inserted into the receiving groove 4a of each retaining hand plate 1 constituting the connection frame 8, and the opening edge of the duct 12 is inserted into the receiving groove 4b. In the present embodiment, the thickness of the duct plate is about 0.6 watts.

As described above, the thickness of the receiving grooves 4a and 4b is about 1.5 imn, and the thickness of the duct plate Since the width of the ducts is slightly less than one thigh, the opening edges of the ducts 11 and 12 can be easily inserted into the receiving grooves 4a and 4b.

Since duct (2) is generally made of a thin metal plate, the edge of the opening may be slightly wavy due to impact during transportation or installation work. Even in such a case, as described above, the thickness of the receiving grooves 4a and 4b of the joint plate 1 is formed so as to be entirely large in the direction of the opening of the duct. Therefore (because it is slightly larger than about 1 plate as described above), the curved opening is properly guided into the receiving grooves 4a and 4b.

Further, since the curved opening に is pushed into the receiving grooves 4a, 4b, the green opening becomes difficult to fall out of the receiving grooves 4a, 4b. It is desirable that the thickness of the receiving grooves 4a and 4b is set to be larger than the thickness of the duct plate by about one waking. In the present embodiment, as shown in FIG. 2A, a space is provided between the intermediate bending portion 30a and the intermediate bending portion 30b, and the joint plate 1 is formed of a thin metal plate. Therefore, flexibility (flexibility) in the vicinity of the intermediate bent portions 30a and 3Ob can be ensured.

When two ducts are connected, there may be a displacement between the opening edge of one duct and the opening 緣 of the other duct. Even in such a case, since the vicinity of the intermediate bent portions 30a and 30b has flexibility, the opening edge of the duct was inserted into the receiving grooves 4a and 4t>. The displacement of the opening of the duct can be absorbed, and the duct can be easily connected.

After inserting the openings of the ducts 11 and 12 into the receiving grooves 4a and 4b, screw in the tapping screws 16 from the outside of the duct and insert the ducts 11 and 12 and the retaining plate 1 The flat parts 3a and 3b are fixed. In this way, the ducts 1 1 and 1 2 and the flat portions 3 a and 3 b of the joint plate 1 are fixed by the tapping screw 16, so that the two ducts 1 1 and 1 2 can be securely connected. Can be. For this reason, for example, it is possible to more reliably ensure the air blocking performance inside and outside the duct.

The thickness of the duct plate constituting the duct is thin in order to reduce the weight of the duct, and in the present embodiment, the flat portions 3a and 3b are thicker. As mentioned above, the tubing screw penetrates the thin duct, and the thick flat parts 3a and 3 Since the screw is inserted, the tapping screw is securely fixed to the flat portions 3a and 3b. Instead of the tapping screw 16, the ducts 1 and 12 and the flat portions 3a and 3b of the joint plate 1 can be fixed using welding or an adhesive.

The L-shaped connecting member 2 of the connection frame 8 may be sealed by caulking in order to further enhance the air blocking property in the duct and more reliably prevent the gas from flowing out of the duct. Further, not only the two L-shaped connecting members but also the entire cover 7 of the joint plate 1 may be coked.

By the way, ducts are composed of multiple duct boards in order to reduce the space for storage and transportation. Multiple duct boards are brought to the installation site and combined at the installation site to form a duct.

FIG. 5A is a view of the duct 10 viewed from the opening edge side. The duct 10 is configured by combining four duct boards 10a, 10b, 10c, and 10d. And each duct board is connected by the convex part 17 in a duct in a corner part. The in-duct convex portion 17 is formed on the entire duct along the direction of the connecting axis 20 (FIG. 6) of the duct.

FIG. 5B is an enlarged view of the vicinity of the in-duct convex portion 17 connecting the duct plate 10b and the duct plate 10c. A duct fold 17a is formed at the end of the duct plate 10b by bending, and a duct bend 17b is formed at the end of the duct 10c by bending. Have been.

The duct plate 10b and the duct plate 10c are connected by inserting the duct bending portion 17b into the duct folding portion 17a. The duct bent portion 17b is formed with a retaining projection 17c on the inside so that the duct plate 1Ob and the duct plate 10c are not separated.

As described above, the length L6 of the joint plate 1 is formed slightly shorter than the length L5 of one side of the opening edge of the duct. Specifically, the length L 6 of the joint plate 1 is equal to the length of the convex portion 17 in the duct located on both sides of one side of the opening portion, and is equal to the length of the opening portion. 'The length is shorter than the side length L5 (Fig. 5A).

For this reason, when attaching the connection frame 8 to the opening of the duct, as shown in FIG. 5B, take both ends of each joint plate 1 so as to avoid the convex portion 17 in the duct of the duct. Can be attached. In this case, as shown in FIG. 5B, it is possible to insert the flat portion 3b (3a) of the joint plate 1 on the back side of the duct folding portion 17a. The correspondence between the configuration of the present invention and each unit in the present embodiment will be described below. The direction of the connecting axis 20 (FIG. 6) of the duct to be installed is the arrangement direction in the present embodiment, and the joint plate 1 shown in FIGS. 1A and 1B is the connecting portion in the present embodiment.

The flat portions 3a and 3b are inner flat portions in the present embodiment. The flat portions 3a and 3b are portions constituted by a single metal plate, and have a substantially flat shape. Then, as shown in FIG. 3B, the plane portions 3a and 3b are parallel to the inner surfaces of the ducts 11 and 12, and are in contact with the inner surfaces of the ducts. In this embodiment, the flat portions 3a and 3b are in contact with the inner surfaces of the ducts 11 and 12, but may be located close to the inner surfaces of the ducts 11 and 12.

The receiving grooves 4a and 4b formed by being surrounded by the flat portions 3a and 3b, the intermediate bent portions 30a and 30b, and the flat portions 5a and 5b are insertion grooves in the present embodiment. As described above, the openings の of the duct are inserted into the receiving grooves 4a and 4b, and the openings 緣 are sandwiched and held.

Further, the flat portions 5a and 5b and the cover portion 7 are outer flat portions in the present embodiment. As shown in FIG. 1B and FIG. 2A, the portion constituted by the flat portions 5a and 5b and the cover portion 7 has a substantially flat shape as a whole.

Then, as shown in FIG. 3B, the flat portions 5a and 5b and the cover portion 7 are parallel to the outer surface of the duct 11.1.2 and are in contact with the outer surface of the duct. In the present embodiment, the flat portions 5.a and 5b and the cover portion 7 are in contact with the outer surfaces of the ducts 11 and 12; Good.

Further, the flat space 6 is a connection target portion or a connection space in the present embodiment. In the present embodiment, the flat gaps 6 are formed at both ends of the joint plate 1 and have flat shapes corresponding to the shapes of the flat portions 5 a and 5 b and the cover portion 7.

Further, the intermediate bent portions 30a and 30b are intermediate portions in the present embodiment, and the intermediate bent portions 30a and 30b are flat portions 3a and 3b that are inner flat portions, The flat portions 5a and 5b, which are the outer flat portions, and the cover portion 7 are integrally connected. Then, as shown in FIG. 3B, the intermediate bending portions 30a and 3Ob are ducts 1 Located between 1 and 12. Further, the L-shaped connecting member 2 is a separate connecting portion or a separate connecting piece in the present embodiment.

(2) Second embodiment

A second embodiment of the duct connection device according to the present invention will be described with reference to the drawings. FIG. 7 is a perspective view of a state where four joint plates 1 are disassembled. In the first embodiment, each joint plate 1 is connected using the L-shaped connecting member 2.

In this embodiment, instead of the L-shaped connecting member 2, the plate portion of the cover part 7 of the joint plate 1 is extended to provide an extension 9, and the extension 9 is bent inward at a substantially right angle. To form the bent connecting member 22. Then, the bent connecting members 22 are inserted into the flat gaps 6 of the adjacent joint plates 1, and the joint plates 1 are connected to form a frame.

In the present embodiment, a flat space 6 is formed at one end of the joint plate 1, and a bent connecting member 22 is formed at the other end. The bent connecting member 22 is an integrated connecting portion or an integrated connecting piece in the present embodiment. Other configurations and operations, duct connection work, and the correspondence with the configuration of the present invention are the same as those in the first embodiment.

(3) Third embodiment

A third embodiment of the duct connection device according to the present invention will be described with reference to FIG. 8A. FIG. 8A is a side view of the joint plate 1 according to the embodiment 2.

A central reinforcing portion 7a is formed at the center of the cover part 7 of the joint plate 1 in the present embodiment. The central reinforcing portion 7a is formed over the entire cover portion 7 in the direction of the length L6 (FIG. 1B) of the joint plate 1. As shown in FIG. 8A, the central reinforcing portion 7a is formed on the cover part 7 by bending.

The joint plate 1 is reinforced by forming the central reinforcing portion 7 a on the cover part 7, and the joint plate 1 can be prevented from being bent. Although the central reinforcing portion 7a in the present embodiment is provided so as to protrude outward, it may be provided so as to be concave inward. Although the central reinforcing portion 7a is formed in a substantially semicircular shape in FIG. 8A, the shape is not limited to such a shape, and the central reinforcing portion 7a having a different shape can be adopted. Other configurations and operations, duct connection work, and the correspondence with the configuration of the present invention are the same as those in the first embodiment.

(4) Fourth embodiment

A fourth embodiment of the duct connection device according to the present invention will be described with reference to FIG. 8B. FIG. 8B is a side view of the joint plate 1 in the present embodiment.

In the cover part 7 of the joint plate 1 in the present embodiment, end reinforcing portions 7 and 7c are formed at both ends. The end reinforcing portions 7 b and 7 c are formed over the entirety of the cover 7 along the length L 6 (FIG. 1B) of the joint plate 1. As shown in Fig. 8B, the end reinforcements 7b and 7c are formed on the cover part 7 by bending. Since the end reinforcing portions 7b and 7c are formed at both ends of the cover 7, the joint plate 1 is reinforced, and the joint plate 1 can be prevented from being bent. Since the two end reinforcing portions 7b and 7c are formed in the cover portion 7 as described above, only one central reinforcing portion 7 is provided at the center of the cover part 7 as in the third embodiment. The joint plate 1 can be more reliably reinforced than when a is provided. In addition to the end reinforcing portions 7b and 7c in the present embodiment, for example, a central reinforcing portion 7a at the center shown in the third embodiment is added, and three reinforcing portions are provided on the cover portion 7. Is also good. Further, in addition to the central reinforcing portion 7a at the central portion shown in the third embodiment, one of the two end reinforcing portions 7b and 7c in the present embodiment is reinforced. A part 7b may be provided.

Although the end reinforcing portions 7b and 7c in the present embodiment are provided so as to protrude outward, they may be provided so as to be depressed inward. Further, although the end reinforcing portions 7b and 7c are formed in a substantially semicircular shape in FIG. 8B, the shape is not limited to such a shape. 7c can also be adopted.

Other configurations and operations, duct connection work, and correspondence with the configuration of the present invention are the same as those in the first embodiment.

(5) Fifth embodiment

A fifth embodiment of the duct connection device according to the present invention will be described with reference to FIG. 8C. FIG. 8C is a side view of the joint plate 28 in the present embodiment. The joint plate 28 shown in FIG. 8C has the same length as the joint plate 1 in the first embodiment. The opening is slightly shorter than the length of one side of the opening edge.

In the present embodiment, the flat portions 23a and 23b correspond to the flat portions 3a and 3b shown in the first embodiment, and the middle and indirect portion 31 is used in the first embodiment. This corresponds to the intermediate bent portions 30a and 30 shown in the embodiment.

Also, the flat portions 25a and 25b correspond to the flat portions 5a and 5b shown in the first embodiment, and the receiving grooves 24a and 24b are used. It corresponds to the receiving grooves 4a and 4b shown in the form. Further, the cover part 27 force corresponds to the cover part 7 shown in the first embodiment, and the flat gap 26 corresponds to the flat gap 6 shown in the first embodiment. .

In the present embodiment, the flat portions 25a and 25b and the cover part 27 form a flat box, and the intermediate connecting portion 31 is formed by the box-shaped flat portions 25a and 25b. The cover part 27 is connected to the flat parts 23a and 23b.

As in the state shown in FIGS. 1A and 2B described in the first embodiment, the four joint plates 28 are arranged in a frame shape, and the L-shaped connecting member 2 Is inserted, and the adjacent joint plates 28 are connected to each other to form a frame. Then, the openings に of the ducts are inserted into the receiving grooves 24 a and 24 b of each joint plate 28, and the ducts are connected, similarly to FIG. 3A described in the first embodiment. The duct and each joint plate 28 are fixed by the tubing screw 16.

In the present embodiment, the joint plate 28 is formed of a strong resin, and is formed by injection molding, pressure and heat molding, or the like. Note that the retainer plate 28 may be made of metal or hard rubber instead of resin.

Note that the joint plate 28 is a connecting portion in the present embodiment, and the flat portions 23a and 23b are inner flat portions in the present embodiment. Further, receiving grooves 24 a and 24 b formed by being surrounded by the flat portions 23 a and 23 b, the intermediate connecting portion 31, and the flat portions 25 a and 25 b are inserted in the present embodiment. It is a groove.

The box-shaped portion formed by the flat portions 25a and 25b and the cover portion 7 is the outer flat portion in the present embodiment, and the flat gap 26 is the connection target portion or the flat portion in the present embodiment. This is a connection question. The flat voids 26 are formed at both ends of the joint plate 28, and have the shape of a box of the flat portions 25 a and 25 b and the cover portion 27. It has a correspondingly flat shape.

Further, the intermediate connecting portion 31 is an intermediate portion in the present embodiment, and the flat gap 6 is an L-shaped connecting member 2 (see FIG. 1A) to be inserted is a separate connecting portion or a separate connecting piece in the present embodiment. .

Other configurations and operations, connection work of ducts, and correspondence with the configuration of the present invention are the same as those of the first embodiment.

(6) Sixth embodiment

A sixth embodiment of the duct connection device according to the present invention will be described with reference to FIG. In the joint plate 1 according to the first to fourth embodiments, the outer flat portions (the flat portions 5a and 5b and the cover portion 7) and the inner flat portions (the flat portions 3a and 3b) are provided. Have the same length (length L 6 in FIG. 1B). Similarly, the joint plate 28 according to the fifth embodiment has an outer flat portion (flat portions 25a and 25b and a cover portion 27) and an inner flat portion (flat portions 23a and 23). b) have the same length.

In order to avoid the in-duct convex portion 17 inside the duct shown in FIG. 5B in the first embodiment, the length of the joint plate 1 or the joint plate 28 is longer than the length of one side of the duct. It is formed short. Therefore, the joint plate 1 and the joint plate 28 do not touch the outer corners of the duct.

In the present embodiment, the length of the inner flat portion in the direction of the opening edge of the duct (the length L6 direction shown in FIG. 1B of the first embodiment) is determined by the direction of the edge of the opening of the duct. Is formed shorter than the length of the outer flat portion.

For example, the lengths of the flat portions 5a and 5b and the cover portion 7 shown in FIG. 1B are set to be approximately the same as the length of one side of the opening edge, and the length of the flat portions 3a and 3b As the length up to the position indicated by the line 34.

As a result, as shown in Fig. 9, the flat portions 3a and 3b (or the flat portions 23a and 23b), which are the inner flat portions, avoid the in-duct convex portion 17 of the duct. The flat parts 5a and 5b, which are the outer flat parts, and the cover part 7 (or the flat parts 25a and 25b and the cover part 27), which are the outer flat parts, sufficiently cover the corners outside the duct. Can be covered. By adequately covering the corners of the duct, it is possible to ensure the air-tightness of the air inside and outside the duct, and to reliably prevent the gas inside the duct from flowing out of the gap. Other configurations and operations, duct connection work, and correspondence with the configuration of the present invention are the same as those in the first embodiment.

(7) Seventh embodiment

A seventh embodiment of the duct connection device according to the present invention will be described with reference to FIGS. 10, 11, 12, and 12B. FIG. 10 is a side view of the joint plate 41 in the present embodiment, FIG. 11 is a perspective view of the joint plate 41 and the L-shaped connecting member 42, and FIG. 12A uses the joint plate 41. FIG. 12B is an enlarged view of the vicinity of the in-duct convex portion 17 of the duct when the duct is connected to the duct, and FIG. It is.

In the first to sixth embodiments, the L-shaped connecting member 2 is located outside the corner of the duct, and connects the joint plates 1 or the stay plates 28. On the other hand, in the present embodiment, the L-shaped connecting member 42 as a separate-type connecting portion or a separate-type connecting piece is located inside the duct corner, and connects each joint plate 41. ing. A bending plate 44 is fixed to the flat plate 43. The bending plate 44 is made of a metal plate, and formed by bending symmetrically to form bending plane portions 44a and 44b and a fixed plane portion 44c. The fixed flat portion 44c is fixed to the flat plate 43 by spot welding at a plurality of locations.

The length L 8 of the flat plate 43 shown in FIG. 11 is almost the same as the length of one side of the opening of the duct, and the bent plate 44 has the length of the flat plate 43 at both ends. It is formed shorter than L8 by length L7. That is, projecting flat portions 43 a protruding from the bending plate 44 are formed on both ends of the flat plate 43.

As shown in FIGS. 10 and 11, a cover piece 45 is fixed to each end of the bent plate 44 by a rivet screw or the like. Then, a flat gap 46 is formed between the fixed flat portion 44c and the cover piece 45.

When constructing a frame using this 41, four joint plates 4 1 are arranged in a square, an L-shaped connecting member 42 is inserted into each flat space 46, and the adjacent joint plates 41 are connected to each other. connect. In this case, the flat plate 43 is located outside and the cover piece 45 is located inside.

In this way, the opening 緣 of the duct is connected by the frame constructed using the joint plate 41. I do. That is, the opening edge of one duct is inserted into the groove 47b, and the opening 緣 of the other duct is inserted into the groove 47a. Thereafter, as shown in FIG. 3A of the first embodiment, a tapping screw 16 or the like is screwed in from the outside of the duct to fix each joint plate 41 to the duct.

In the present embodiment, since the L-shaped connecting member 42 is located inside the duct and not outside the duct, the appearance of the bridge duct is not spoiled. Further, since there is no need to provide a space for inserting the L-shaped connecting member 42 in the flat plate 43 located outside the duct, the protrusion outside the duct can be further reduced, and the installed duct can be reduced. Occupied space can be reduced.

At the center of the L-shaped connecting member 42, an inner bent portion 42a bent inward is formed. Due to the formation of the inner bent portion 42a, when each joint plate 41 is attached to the opening 緣 of the duct, as shown in FIG. The L-shaped connecting member 42 can be located avoiding the part 17.

The inner bent portion 42 a of the L-shaped connecting member 42 in the present embodiment is bent substantially at a right angle, but any other configuration as long as it can be located avoiding the convex portion 17 inside the duct. May be adopted.

For example, a slope connecting member 51 as shown in FIG. 12B can be employed. At the center of the slope connecting member 51, an inner bent portion 51a bent inward is formed. The inner bent portion 51a is formed in a planar shape, unlike the inner bent portion 42a in FIG. 12A. By forming the inner bent portion 51a, the slope connecting member 51 can be positioned so as to avoid the duct inner convex portion 17 of the duct.

Further, instead of the inner bent portion 42a and the inner bent portion 51a, the central portion of the L-shaped connecting member 42 or the slope connecting member 51 is bent into a curved shape, and the in-duct convex portion 1 is formed. 7 may be avoided.

The correspondence between the configuration of the present invention and each unit in the present embodiment is shown below. The joint plate 41 shown in FIGS. 10 and 11 is a connecting portion in the present embodiment, and the flat plate 43 is an outer flat portion in the present embodiment. The flat plate 43 is constituted by a single bent plate, and has a substantially flat shape.

Then, as shown in FIG. 12, the plane plate 43 is parallel to the outer surface of the duct, and Contacting the outer surface of the duct. In the present embodiment, the flat plate 43 is in contact with the outer surface of the duct, but may be located close to the outer surface of the duct. -The receiving grooves 47a and 47b between the flat plate 43 and the bending flat portion 44a and between the flat plate 43 and the bending flat portion 44b are insertion grooves in the present embodiment. . As described above, the opening edges of the duct are inserted into the receiving grooves 47a and 47b, and the opening 緣 is sandwiched and held.

The bending plate 44 (bending flat portions 44a and 44b, fixed flat portion 44c) and the cover piece 45 are inner flat portions in the present embodiment. The portion constituted by the bending plate 44 and the cover piece 45 has a substantially flat shape as a whole as shown in FIGS. 10 and 11.

Then, as shown in FIG. 12, the bent plate 44 and the cover piece 45 are parallel to the inner surface of the duct and are in contact with the inner surface of the duct. In the present embodiment, the bent plate 44 and the cover piece 45 are in contact with the inner surface of the duct, but they may be located close to the inner surface of the duct.

Further, the flat gap 4 & is a connection target portion or a connection space in the present embodiment. The flat voids 46 are formed at both ends of the joint plate 1, and have flat shapes corresponding to the shapes of the bent plate 44 and the cover piece 45.

Further, the fixed flat portion 44c functions substantially as an intermediate portion in the present embodiment. The fixed flat portion 44c is formed by a bent plate 44 and a cover piece 45, which are inner flat portions, and an outer flat portion. It is positioned so as to integrally connect with a flat plate 43 as a flat portion. Then, as shown in FIG. 10, the fixing flat portion 44c is located between the openings 緣 of the duct inserted into the receiving grooves 47a and 47b.

Further, the L-shaped connecting member 42 shown in FIG. 12A is a separate-type connecting portion or a separate-type connecting piece in the present embodiment, and the inner bent portion 42 a formed on the L-type connecting member 42 is It is a bent part in an embodiment. In addition, the slope connecting member 51 shown in FIG. 12B is a separate-type connecting portion or a separate connecting piece in the present embodiment, and the inner bent portion 51 a formed on the slope connecting member 51 is the same as the present embodiment. At the bent portion.

(8) Eighth embodiment

An eighth embodiment of the duct connecting device according to the present invention will be described with reference to FIGS. 13 and 14A. Will be explained. FIG. 13 is an enlarged view of the vicinity of the inner protrusion 17 of the duct, and FIG. 14A is a side view of the joint plate 53 according to the present embodiment.

In the seventh embodiment, the L-shaped connecting member 42 and the slope connecting member 51 on which the inner bent portion 42 a and the inner bent portion 51 a are formed are formed in order to avoid the duct inner convex portion 17. Is used.

On the other hand, as shown in FIG. 13 in the present embodiment, the L-shaped connecting member 2 described in the first embodiment and the like is used, and this L-shaped connecting member 2 is used in a duct. Surface (the inner surfaces of the duct plates 10b and 1Oc in Fig. 13) in the direction away from the surface in the direction of the arrow 90. Since the 丄 -shaped connecting member 2 is held at this position, the L-shaped connecting member 2 can be positioned avoiding the in-duct convex portion 17.

In order to hold the L-shaped connecting member 2 at a position away from the inner surface of the duct in the direction of the arrow 90, the joint plate 53 in the present embodiment uses the above-described second embodiment (FIGS. 10, 10, 11). A box member 54 is fixed to the bent plate 44 instead of the cover piece 45 shown in FIG. 12A and FIG. The box member 54 has a flat space 55. Then, by inserting the L-shaped connecting member 2 into the flat space 55, the adjacent joint plates 53 are connected to form a frame. Since the flat gap 55 is located inside the duct with respect to the flat gap 46, the L-shaped connecting member 2 inserted in the flat gap 55 is held at a position away from the inner surface of the duct in the direction of arrow 90. can do.

Note that the joint plate 53 is a connecting portion in the present embodiment, and the flat gap 55 is a quick-setting target portion or a quick-connecting gap in the present embodiment. Other configurations and operations, duct connection work, and the correspondence with the configuration of the present invention are the same as those in the first embodiment.

(9) Ninth embodiment

A ninth embodiment of the duct connection device according to the present invention will be described with reference to FIG. 14B. FIG. 14B is a side view of the joint plate 57 according to the present embodiment. In the eighth embodiment shown in FIG. 13, the box member 54 is fixed to the bending plate 44 in order to position the L-shaped connecting member 2 in a direction away from the inner surface of the duct in the direction of the arrow 90. are doing. On the other hand, in the present embodiment, the bending plate 58 is fixed to the bending plate 44. The bent plate 58 is made of a bent plate, and is bent symmetrically to form a bent plate. A recess is formed in the same manner as described above. Then, the concave portion of the bent plate 44 and the concave portion of the bent plate 58 are fixed to face each other to form a coupling gap 59.

Then, by inserting the L-shaped connecting member 2 into the connecting space 59, the adjacent joint plates 57 are connected to form a frame. Since the joining gap 59 is expanded inward with respect to the flat gap 46 shown in the above-described seventh embodiment, the L-shaped connecting member 2 inserted into the joining gap 59 is indicated by an arrow from the inner surface of the duct. It can be held at a location separated in the 90 direction.

Note that the joint plate 57 is a connection portion in the present embodiment, and the connection gap 59 is a connection target portion or a connection space in the present embodiment. Other configurations and operations, duct connection work, and the correspondence with the configuration of the present invention are the same as those of the first embodiment.

(10) Implementation form of the 10th 媳

A tenth embodiment of the duct connection device according to the present invention will be described with reference to FIG. 15A. FIG. 15A is a front view of the stay plate 1 in the present embodiment. The joint plate 1 is formed with oblique portions 61, 62, 63, and 64 at the corners at both ends of the flat portions 3a and 3b.

Each of the oblique sides 6 1, 6 2, 6 3, 6 4 is inclined so that the end sides 6 6, 6 7 become shorter from the center 65 of the joint plate 1 in the direction of the arrow 91. When the joint plate 1 is formed with the hypotenuses 61, 62, 63, and 64, when the joint plate 1 is attached to the opening edge of the duct, the corners of the joint plate 1 correspond to the opening edge. Collision can be avoided, and the joint plate 1 can be smoothly attached to the opening edge.

Note that the oblique portions 61, 62, 63, and 64 in the present embodiment can also be applied to the second to ninth embodiments. That is, the oblique sides 61, 62, 63, 64 may be formed at the corners at both ends of the plane parts 3a, 3b in FIG. 7 in the second embodiment.

Also, oblique portions 61, 62, 63, 64 may be formed at the corners at both ends of the planar portions 3a, 3b in FIG. 8A in the third embodiment. FIG. 8B in the embodiment Oblique sides 61, 62, 63, and 64 may be formed at the corners at both ends of the flat portions 3a and 3b.

Further, oblique sides 61, 62, 63, 64 may be formed at the corners at both ends of the plane parts 23a, 23 of FIG. 8C in the fifth embodiment. Also, the oblique sides 6 1, 6 2, 6 3, 64 are attached to the corners at both ends of the bending plane portions 44 a, 44 b and the cover piece 45 in FIGS. 10 and 11 in the seventh embodiment. It may be formed.

Further, hypotenuse portions 61, 62, 63, 64 may be formed at the corners at both ends of the bending plane portions 44a, 44b in FIG. 14A in the eighth embodiment, Oblique sides 61, 62, 63, and 64 may be formed at the corners at both ends of the bending plane parts 44a and 44b in FIG. 14B in the ninth embodiment.

(1 1) First Embodiment

A first embodiment of a duct connection device according to the present invention will be described with reference to FIGS. 16, 17A, 17B, and 17C. FIG. 16 is a perspective view showing the joint plate 100 in the present embodiment. FIG. 17A is a side view of the joint plate 100 of FIG. 16, FIG. 17B is a plan view of FIG. 17A, and FIG. 17C is a view from the state of FIG. 17B. FIG. 4 is a plan view showing a state where two joint plates 100 are connected.

First, as shown in FIG. 17A, a joint plate 100 in the present embodiment has a bent plate 102 fixed to a flat plate 101. The bent plate 102 is formed of a metal plate, and bent plane portions 102 a and 102 b and a fixed flat portion 102 c are formed by symmetrically bending. . The fixed flat portion 102c is fixed to the flat plate 101 by spot welding at a plurality of locations. The length 3 2 of the flat plate 101 shown in FIG. 16 is almost the same as the length of one side of the opening edge of the duct, and the bent plate 102 has flat plates 101 at both ends. Is formed shorter than the length L32 by a length L33.

Further, connecting arms 103 and 104 are formed at one ends of 102 a and 102 b, respectively. The connecting arms 103 and 104 have arm end portions 103a and 104a, respectively, which are located substantially at right angles to the bending plate 102, and the connecting arms 103 and 104 respectively. Are formed with inner bent portions 103b and 104b. When constructing a frame using this 100, four joint plates 100 are arranged in a square. And insert each joint plate 100 in the direction of arrow 92 (Fig. 17A, Fig. 17B). Then, the end of the joint plate 100 that connects the arm end portions 103a and 104a of the connecting arms 103 and 104 (the connecting arms 103 and 104 are formed). (The end on the other side) is in contact with the bent flat sections 102a and 102b (Fig. 17C).

In this case, the frame is configured such that the flat plate 101 is located outside and the bent plate 102 is located inside. Thus, the opening edges of the duct are connected by the frame constituted by using the joint plate 100.

The opening edge part of one duct is inserted into the groove 105b, and the opening part of the other duct is inserted into the groove 105a. Thereafter, as shown in FIG. 3A of the first embodiment, tapping screws 16 and the like are inserted from the outside of the duct to fix the duct to each bending plate 102. In this case, an evening screw 16 or the like may be screwed into the arm tip portions 103a and 104a.

In the present embodiment, as shown in FIG. 17C, the arm tips 103 a and 104 a of the connecting arms 103 and 104 are connected to the ends of the adjacent joint plates 100. It is brought into contact with the bent plane portions 102a and 102b, and in this state, the openings of the duct are inserted into the receiving grooves 105a and 105b.

Therefore, the width 31 of the receiving groove 105a, 1051> is set slightly larger than the thickness of the arm tip part 103a, 104a plus the thickness of the duct plate. It has been done. In the present embodiment, the thickness of the arm tip portions 103a and 104a is about 1.2 imn ', and the thickness of the duct plate is about 0.6 to 0.8 thigh.

The width L31 of the receiving grooves 105a and 105b is set to about 2.3 thighs. Thus, the width L31 of the receiving grooves 105a, 105b is several mm larger than the thickness of the arm end portions 103a, 104a and the opening edge of the duct. (About 3 mm to 5 mm) If it is set large, the opening of the duct can be smoothly inserted into the grooves 105a and 105b.

The width L31 of the receiving grooves 105a and 105b is generally equal to the opening of the duct over the length direction of the duct 10 (the direction of the length L32 of Fig. 16). However, as described above, tapping screws 16 and the like are screwed in from the outside of the duct to fix each bent plate 102 and the duct. Clear the gap between the edge and As a result, it is possible to secure the air-tightness of the air inside and outside the duct.

In the present embodiment, since the connecting arms 103 and 104 are located inside the duct and not outside the duct, the appearance of the installed duct is not spoiled. Further, since there is no need to provide a space for inserting the L-shaped connecting member 42 in the flat plate 101 located outside the duct, the protrusion outside the duct can be further reduced, and the installed duct Occupied space can be reduced.

As described above, since the connecting arms 103 and 104 are formed with the inner bent portions 103b and 104b, respectively, the projecting portion 17 inside the duct (see FIG. , 5B), the joint plate 100 can be attached to the opening edge of the duct. The inner bent portions 103b, 104b of the connecting arms 103, 104 in the present embodiment are formed to be bent at substantially right angles, but are positioned so as to avoid the in-duct convex portion 17. Other configurations may be employed as long as they can be made. The slope connecting member 51 as shown in FIG. 12B described in the seventh embodiment can be formed on the connecting arms 103 and 104. Further, the central portions of the connecting arms 103 and 104 may be bent into a curved shape so as to avoid the in-duct convex portion 17.

The correspondence between the configuration of the present invention and each unit in the present embodiment will be described below. The joint plate 100 shown in FIG. 16 to FIG. 17C is a connecting portion in the present embodiment, and the flat plate 101 is an outer flat portion in the present embodiment. The flat plate 101 is made of one metal and has a substantially flat shape.

The flat plate 101 is attached in parallel with the outer surface of the duct and in contact with the outer surface of the duct. In the present embodiment, the flat plate 101 is attached in contact with the outer surface of the duct, but it may be located close to the surface of the duct.

The receiving grooves 105a and 105b are insertion grooves in the present embodiment. As described above, the openings の of the duct are inserted into the receiving grooves 105a and 105b, and the opening edges are sandwiched and held.

Further, the bent plane portions 102 a and 102 b are inner flat portions in the present embodiment. The bending plane portions 102a and 102b are parallel to the inner surface of the duct and are in contact with the inner surface of the duct. In the present embodiment, the bent plane portions 102a and 102b are in contact with the inner surface of the duct, but may be located close to the inner surface of the duct. Further, the bending plane portions 102a and 102b where the arm tip portions 103a and 104a abut are the connection target portions in the present embodiment. Further, the fixed flat portion Γ0 2c substantially functions as an intermediate portion in the present embodiment, and the fixed flat portion 102c is a bent flat portion which is an inner flat portion. b and the flat plate 101 which is the outer flat part are hidden so as to be integrally connected. The fixed flat portion 102c is located between the opening edges of the ducts inserted into the receiving grooves 105a and 105b.

Further, the connecting arms 103 and 104 are separate type connecting portions in the present embodiment, and the inner bent portions 103 b and 104 b formed on the connecting arms 103 and 104 are used in this embodiment. It is a bent part in a form.

(1 2) First and second embodiments

A 12th embodiment of the duct connection device according to the present invention will be described with reference to FIG. FIG. 18 is a side view showing a state in which the connecting arms 106 and 107 are provided instead of the connecting arms 103 and 104 in the first embodiment.

The connecting arms 106 and 107 in the present embodiment are larger than the connecting arms 103 and 104 toward the center of the joint plate 100. For this reason, the end portions 106 a and 107 a of the connecting arms 106 and 107 are brought into contact with the bent plane portions 102 a and 102 b of the adjacent joint plates 100. In this case, a part of the arm end portions 106a and 107a is inserted into the receiving grooves 105a and 105b (see FIGS. 17B and 17C). As a result, the joint plates 100 can be connected more stably.

The connecting arms 106 and 107 are separate type connecting portions in the present embodiment, and the inner bent portions formed in the connecting arms 103 and 104 are the bending portions in the present embodiment. Other configurations and operations, duct connection work, and the correspondence with the configuration of the present invention are the same as those in the eleventh embodiment.

(1 3) 13th embodiment

A thirteenth embodiment of the duct connection device according to the present invention will be described based on FIGS. 19A, 19B and 19C. FIG. 19A is a side view showing the joint plate 100 in which the contact recesses 108 a and 108 b are formed in the bending plane portions 102 a and 102 b, respectively. FIG. 19B is a plan view of FIG. 19A, and FIG. 19C is a plan view showing a state where two joint plates 100 are connected from the state of FIG. 19B.

In the bending plane portions 102a and 102b in the present embodiment, contact recesses 108a and 108b are formed by press working, respectively. The size of the contact recesses 108a and 108b corresponds to the size of the arm tip portions 103a and 104a.

Since the contact recesses 108a and 108b are formed in the bending plane portions 102a and 102b, respectively, from the state shown in Figs. 19A and 19B, when linked to joint plate 1 0 0 as shown in FIG. 1 9 C, the arm tip portion 1 0 3 a, 1 0 4 a is to fit to the contact concave viewed portion 1 0 8 _a, 1 0 a 8 b become.

Therefore, the width L34 of the receiving grooves 105a and 105b may be such that only the opening 緣 of the duct can be inserted. That is, the width L34 of the receiving grooves 105a and 105b can be set smaller than the width L31 (FIG. 17B) shown in the first embodiment.

For example, the width of the receiving grooves 105a and 105 should be set to about 1.0mm for a duct board thickness of about 0.6 thighs to 0.8 bandits. In this way, by setting the width L34 of the receiving grooves 105a and 105b as a width close to the thickness of the duct plate, when the duct is connected, the duct plate and the joint plate are connected. The gap with 100 can be reduced, and the ability to shut off air inside and outside the duct can be more reliably ensured. When the connecting arms 106 and 107 (FIG. 18) of the first and second embodiments are adopted, the size of the contact recesses 108 a and 108 b is It may be formed so as to correspond to the connecting arms 106 and 107.

The contact recesses 108 a and 108 b are connection target portions in the present embodiment. Other configurations and operations, duct connection work, and correspondence with the configuration of the present invention are the same as those in the above-described eleventh embodiment.

(14) Fourteenth embodiment

A fourteenth embodiment of the duct connection device according to the present invention will be described with reference to FIG. FIG. 20 is a perspective view showing a joint plate 100 in which an L-shaped bent portion 109 is provided on a flat plate 101. An L-shaped bent portion 109 bent at a substantially right angle is formed in the flat plate 101. When the joint plate 100 is quickly connected by the L-shaped bent portion 109, the appearance of the corner can be improved, and air leakage from the corner can be reliably shut off.

An elongated hole 110 is formed in the L-shaped bent portion 109, and a screw hole 111 is formed in a corresponding portion of the flat plate 101. In this embodiment, after connecting the joint plates 100, the screws 1 1 and 2 are inserted into the screw holes 1 1 1 through the elongated holes 1 1 0, and the connection of each 1 1 0 is fixed. Since the long hole 110 is formed in the L-shaped bent portion 109, the displacement of each joint plate 100 can be easily absorbed.

Other configurations and operations, duct connection work, and correspondence with the configuration of the present invention are the same as those of the above-described eleventh embodiment.

(15) Other embodiments

The duct connection device according to the present invention is not limited to those exemplified in the above embodiments. For example, in each of the embodiments described above, the shape of the opening edge of the duct is rectangular, but the present invention is not limited to this. The shape of the opening 緣 is circular, and the shape of the rectangle is rectangular. The present invention can also be applied to objects having a polygonal shape other than a rectangle.

In this case, the connection portion may be prepared in accordance with the shape of the opening edge of the duct. For example, if the shape of the opening of the duct is hexagonal, six connecting parts are provided, and when each is connected, an integrated type with an angle corresponding to the shape of the opening It is sufficient to use a quick-connecting portion, an integral connecting piece, a separate connecting portion, or a separate connecting piece.

Also, instead of using a plurality of connection parts, a single connection part is prepared, the connection part is bent or bent, and one end and the other end of the connection part are connected to form a duct. A frame body corresponding to the opening portion may be formed.

Also, the joint plate 1 or the joint plate 28 in the first to fifth embodiments, the joint plate 41 in the seventh embodiment, the joint plate 53 in the eighth embodiment, the ninth embodiment When each frame is formed using the joint plate 57 in the above, the inside and the outside can be reversed with respect to those described in the above embodiments. Further, as shown in FIG. 15B, for example, the size (width L35) of the insertion opening portion of the receiving groove 4a, 4b of the joint plate 1 shown in the first embodiment is received by the receiving groove 4a, 4b may be formed larger than the inside size.

Due to the large width L35 of the insertion opening of the receiving grooves 4a and 4b, the opening 緣 of the duct is guided toward the inside of the receiving grooves 4a and 4b, The opening edge of the duct can be easily and reliably inserted into the receiving grooves 4a and 4b. A configuration as shown in FIG. 15B can be applied to the above embodiments.

In the above description, the present invention has been described with reference to the preferred embodiments. However, each term is used for explanation, not for limitation, and the scope and spirit of the present invention are not described. Changes may be made without departing from the scope of the appended claims.

Claims

The scope of the claims

1 · A duct connection device that connects the opening edges of two ducts arranged along a predetermined arrangement direction,

A connecting portion composed of an inner flat portion, an outer flat portion, and an intermediate portion, wherein the inner flat portion has a substantially flat shape, and extends along the openings of the two ducts. The flat surface is located inside the duct, parallel to the inner surface of the duct, and close to or in contact with the inner surface of the duct;

The outer flat portion has a substantially flat shape, is located outside the duct along the openings of the two ducts, and the flat surface is parallel to the outer surface of the duct, and Close to or in contact with the outer surface of

The intermediate portion is located between the openings of the two ducts, and integrally connects the inner flat portion and the outer flat portion.

A duct connection device characterized by the following.

2. The duct connection device according to claim 1,

The width of the inner flat portion in the arrangement direction is larger than the width of the outer flat portion in the arrangement direction,

A screw member that penetrates the duct and is screwed into the inner flat portion;

The connection of the duct is characterized by the following.

3. The duct connection device according to claim 1,

A connection target portion is formed at one end of the connection portion,

At the other end of the connection portion, an integrated connection portion that can be connected to the connection target portion and that is integrally provided at the other end of the connection portion is formed.

A duct connection device, characterized in that:

4. In the duct connection device S according to claim 3,

The connection target portion is a connection space, The duct connecting device, wherein the integrated connecting portion is an integrated connecting piece inserted into the connecting space.

5. The duct connection device according to claim 4,

The said connection part is formed by bending one metal plate, The connection device of the duct characterized by the above-mentioned.

6. The duct connection device according to claim 4,

The connection part is formed by combining and fixing a plurality of processed metal plates.

A duct connection device characterized by the following.

7. The duct connection device according to claim 4,

The length of the inner flat portion in the edge direction of the opening of the duct is shorter than the length of the outer flat portion in the direction of the opening edge of the duct.

A duct connection device, characterized in that:

8. The duct connection device according to claim 7,

The integrated connecting piece is provided integrally with a flat portion inside the connecting portion, and the integrated connecting piece is formed with a bent portion bent toward the inside of the duct.

A duct connection device, characterized in that:

9. The duct connection device according to claim 7,

The integrated connection piece is provided integrally with a flat portion inside the connection portion, and the integrated connection piece is provided so as to be located away from the inside of the duct. Connecting device.

10. The duct connection device according to claim 1, At both ends of the connection portion, a connection target portion is formed, respectively,

It has a separate connection part that can be connected to the two connection target parts and is configured separately from the connection part.

A duct connection device, characterized in that:

11. The duct connection device according to claim 10,

The connection target portion is a connection space,

The separate connection portion is a separate connection piece inserted into the connection space.

1 2. The duct connecting device according to claim 11,

The duct connection device, wherein the connection portion is formed by bending a single metal plate.

1 3. In the duct connection device S according to claim 11,

The connection portion is formed by combining and fixing a plurality of processed metal plates.

A duct connection device, characterized in that:

14. The duct connection device according to claim 11,

The length of the inner flat portion in the direction of the opening of the duct is shorter than the length of the outer flat portion in the direction of the opening edge of the duct.

A duct connection device, characterized in that:

15. The duct connection device according to claim 14,

The connection space is formed in a flat portion inside the connection portion,

The separate connection piece has a bent portion that is bent toward the inside of the duct when inserted into the connection space.

A duct connection device, characterized in that:

16. The duct connection device according to claim 14,

The connection space is formed in a flat portion inside the connection portion,

The separate connection piece is provided so as to be located away from the inside of the duct when inserted into the connection space.

A duct connection device, characterized in that:

17. In a duct connection device that connects the opening edges of two ducts,

On both sides, there is a connection part with an insertion groove into which the opening edges of the two ducts are inserted.

By inserting the openings に into the insertion grooves on both sides of the connection portion, the openings の of the two ducts are sandwiched and connected.

A duct connection device that specializes in this.

18. In connection and concealment of the duct according to claim 17,

The insertion groove formed in the connection portion is formed such that the size of the entrance portion into which the opening edge is inserted is larger than the size of the inside of the insertion groove.

A duct connection device, characterized in that:

1 9. The duct connection device according to claim 17,

At least one end of the connection portion has a connection space into which a connection piece for connecting the one end to the other end can be inserted.

A duct connection device, characterized in that:

20. The duct connection device according to claim 19,

The opening edges of the two ducts to be connected have a square shape,

The four connection portions are connected by inserting a connection piece into the connection space, and form a frame corresponding to the square shape,

A duct connection device characterized by the following.

1. In the duct connection apparatus according to claim 19,

The connecting space has a flat shape parallel to an inner surface or an outer surface of the duct, and the connecting piece has a flat shape corresponding to the shape of the connecting space. Connection device.