JP6577294B2 - Connecting unit and duct construction method - Google Patents

Description

  The present invention relates to a connecting unit for constructing a duct used for building air conditioning and the like, and a duct construction method.

  As a duct used for building air conditioning equipment, for example, the configuration of Patent Document 1 has been proposed. The duct of Patent Document 1 is bent at three cuts formed in advance in the heat insulation panel to form a rectangular tube-shaped unit duct, and the unit is arranged on four parallel rails installed in parallel to the installation location such as the ceiling. The corner of the duct is fitted and attached to the installation location. And the unit duct which adjoins opening end is connected by fitting the uneven | corrugated | grooved part previously formed in each opening end. Thus, since the duct of patent document 1 can bend a flat heat insulation panel in a construction site and can form a unit duct, there is an advantage that it is not bulky at the time of transportation of a heat insulation panel.

Japanese Utility Model Publication No. 4-31480

  However, the duct of Patent Document 1 requires time and effort to apply an adhesive tape that connects the ends of the folded heat insulation panels. In addition, because it is configured to support the corners of the unit duct with four parallel rails spanned to the site such as the ceiling, it is necessary to install the four parallel rails accurately, long parallel rails are installed There are difficulties such as taking time and effort.

  That is, the present invention has been proposed in order to suitably solve these problems related to the prior art, and it is an object of the present invention to provide a connecting unit and a duct construction method capable of easily configuring a duct. To do.

In order to overcome the above-mentioned problems and achieve the intended purpose, the connecting unit of the invention according to claim 1 of the present application provides:
A connecting unit used to connect plate-like boards to form a rectangular tube-shaped duct,
A first connecting member that can be attached to the edge of the board by sandwiching the board that forms the wall of the duct between a pair of first attachment parts disposed opposite to the edge of the first bottom portion in the thickness direction;
A second connecting member that can be attached to the edge of the board by sandwiching the board in a plate thickness direction between a pair of second attachment portions that are arranged opposite to the edge of the second bottom portion;
The first connecting member is
A first fastening portion formed so as to protrude from the outer surface of one of the first mounting portions;
An engaging protrusion formed to protrude from the outer surface of the other first mounting portion,
The second connecting member is
An engaging protrusion is formed on the outer surface of one second mounting portion so as to be engageable with the engaging protrusion in a state where the outer surface of the first bottom portion is in contact with the outer surface of the one second mounting portion. An engagement receiving portion that regulates relative displacement between the first connecting member and the second connecting member in the extending direction of each mounting portion from each bottom portion,
A second fastening portion that is formed so as to protrude from the outer surface of the second bottom portion, and that faces the first fastening portion in a state in which the engagement protrusion and the engagement receiving portion are engaged;
The outer surface of the first bottom portion and the outer surface of the one second mounting portion are brought into contact with each other to engage the engaging protrusion and the engagement receiving portion, and the first fastening portion and the second facing each other. The gist is that the fastening portion is connected, and the first connecting member and the second connecting member can be connected in the direction in which the open ends of the mounting portions cross each other.
According to the first aspect of the present invention, since the board is sandwiched between the pair of attachment portions, the first connecting member and the second connecting member can be easily attached to the board. Further, the first connecting member and the second connecting member can be easily connected by the engagement of the engaging protrusion and the engaging receiving portion and the connection of the first fastening portion and the second fastening portion, and the first By connecting the connecting member and the second connecting member, it is possible to easily form a duct in which the board is assembled into a rectangular tube shape.

The invention according to claim 2 includes a connection member that connects the first fastening portion and the second fastening portion that are opposed to each other,
The connecting member is
The first fastening part formed in a bowl shape on one edge of the connection member and protruding from the outer surface of one first mounting part and bent in the extending direction of the first mounting part from the first bottom part A first collar that can be hooked onto
In the second fastening portion formed in a hook shape symmetrical to the first hook portion on the other edge of the connecting member, protruding from the outer surface of the second bottom portion and bent to the other second mounting portion side The gist is to have a second hook part that can be hooked.
According to the invention which concerns on Claim 2, the 1st connection member and the 2nd connection member are connected by the connection member which hooks a collar part with respect to the 1st fastening part of a 1st connection member, and the 2nd fastening part of a 2nd connection member. By having the configuration of connecting the first connecting member and the second connecting member, the first connecting member and the second connecting member can be more easily connected.

In the invention which concerns on Claim 3, the said 1st connection member is formed in the state contact | abutted by the other 1st connection member and the outer surfaces of the said 1st bottom part so that mutual 1st fastening parts may oppose. And
The gist is that two first fastening portions facing each other are connected, and the two first connecting members are configured to be connectable so that the open ends of the first mounting portions are in opposite directions.
According to the third aspect of the invention, the first connecting member for assembling the board into a rectangular tube shape can be used to arrange the boards in series so that they can be easily connected, and the duct work can be done with a small number of parts. The degree can be improved.

In the invention which concerns on Claim 4, the connection member which connects the 1st fastening parts of two 1st connection members is included,
The connecting member for connecting the first fastening parts is
The connecting member is formed in a bowl shape on one edge, and protrudes from the outer surface of one of the first mounting portions of one of the two first connecting members to protrude from the first bottom portion of the first mounting portion. A first hook part that can be hooked on the first fastening part formed in a hook shape that bends in the extending direction;
Formed on the other edge of the connecting member in a bowl shape symmetrical to the first flange part, the first connecting member of the other of the two first connecting members protrudes from the outer surface of one of the first mounting parts. The gist of the present invention is to have a second hook part hookable on the first fastening part formed in a hook shape that bends in the extending direction of the first attachment part from the bottom part .

In the invention which concerns on Claim 5, the said engagement receiving part is formed in the hook shape which protrudes from the outer surface of one 2nd attachment part, and bends in the opposite direction to the extension direction of the 2nd attachment part from a 2nd bottom part. It is a summary.
According to the invention which concerns on Claim 5, an engagement protrusion and an engagement receiving part can be engaged easily, and the connection of a 1st connection member and a 2nd connection member can be made easier.

The invention according to claim 6 is characterized in that at least one of the pair of attachment portions has a barb formed on the inner surface.
According to the invention which concerns on Claim 6 , it is difficult to remove a connection member from a board by the return provided in the inner surface of the attaching part.

In order to overcome the above-mentioned problem and achieve the intended purpose, the duct construction method of the invention according to claim 7 of the present application,
A first connecting member is attached to one edge of a plate-like board serving as a wall of the duct, sandwiched in the thickness direction by a pair of first attachment portions, and a plate is attached to the other edge of the board by a pair of second attachment portions. Attach the second connecting member across the thickness direction,
In the first connecting member, the first bottom part connecting the first attaching parts is brought into contact with one second attaching part of the second connecting member attached to a different board, and the first connecting member has a first part. Engage the engagement protrusion formed on the attachment portion with the engagement receiving portion formed on the second attachment portion of the second connecting member attached to a different board,
The second fastening formed on the second bottom part connecting between the second attaching parts in the first connecting part formed on the first attaching part of the first connecting member and the second connecting member attached on a different board. And the first engagement portion and the second engagement portion are connected to each other by engaging the engagement protrusion and the engagement receiving portion,
The gist is that a rectangular tube-shaped duct is assembled by connecting the first connecting member and the second connecting member attached to separate boards.
According to the invention which concerns on Claim 7 , since it is the structure which pinches | interposes a board with a pair of attachment part, a 1st connection member and a 2nd connection member can be easily attached with respect to a board. Further, the first connecting member and the second connecting member can be easily connected by the engagement of the engaging protrusion and the engaging receiving portion and the connection of the first fastening portion and the second fastening portion, and the first A duct can be easily formed by assembling a board attached to the connecting member by connecting the connecting member and the second connecting member into a rectangular tube shape.

In the invention which concerns on Claim 8, it connects so that the 1st fastening part of the said 1st connection member and the 2nd fastening part of the 2nd connection member attached to a different board may be connected by the connection member caught on both fastening parts. The summary is as follows.
According to the invention which concerns on Claim 8 , the structure which connects a 1st connection member and a 2nd connection member by the connection member hooked on the 1st fastening part of the 1st connection member and the 2nd fastening part of the 2nd connection member. By doing, a 1st connection member and a 2nd connection member can be connected more easily.

In the invention which concerns on Claim 9 , the said 1st connection member is attached to the opening edge of the duct assembled by connection of the said 1st connection member and the said 2nd connection member,
The gist is that the ducts are coupled in series by connecting the first bottoms of the first coupling members attached to the opening edges of different ducts and connecting the opposing first fastening parts.
According to the ninth aspect of the present invention, the first connecting member for assembling the board into a rectangular tube shape can be used to arrange the boards in series so that they can be easily connected, and the duct work can be done with a small number of parts. The degree can be improved.

The gist of the invention according to claim 10 is that the first fastening portions of the first connecting members attached to the opening edges of different ducts are connected by connecting members that are hooked to both fastening portions.
According to the invention which concerns on Claim 10 , it is set as the structure which connects two 1st connection members with the connection member hooked on the 1st fastening part of two 1st connection members. It can be connected more easily.

According to the connecting unit according to the present invention, the duct can be easily configured by connecting the first connecting member and the second connecting member attached to the board. Moreover , according to the construction method of the duct which concerns on this invention, a duct can be easily comprised in a construction site by connecting the 1st connection member and 2nd connection member which were attached to the board.

It is a front view which shows the 1st connection member of the connection unit which concerns on the suitable Example of this invention. It is a front view which shows the 2nd connection member of the connection unit of an Example. It is a front view which shows the connection member of the connection unit of an Example. It is a front view which shows the state which attached the 1st connection member and the 2nd connection member to the heat insulation board. It is the schematic explaining the assembly of the duct by the connection unit of an Example. It is the schematic explaining the assembly of the duct by the connection unit of an Example. It is a front view explaining the connection of the duct by the 1st connection member of an Example, and a connection member. The front duct is not shown. It is a side view explaining the coupling | bonding of the duct by the 1st connection member of an Example, and a connection member. It is a schematic perspective view explaining the connection with a 1st connection member and a 2nd connection member. The return is not shown. It is a schematic perspective view explaining the connection of two 1st connection members. The return is not shown.

  Next, a connection unit and a method for constructing a duct according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment.

  As shown in FIGS. 1-6, the connection unit which concerns on an Example is used in order to connect the plate-shaped heat insulation board (board) 50, and to form the rectangular tube-shaped duct 52. As shown in FIG. Moreover, as shown in FIGS. 7-8, the connection unit of an Example can be used also for connecting the plate-shaped heat insulation board 50 which makes the wall of the square-tube-shaped duct 52 in series. The connecting unit of the embodiment includes a first connecting member 10 and a second connecting member 12 that are configured to be attachable to the edge of the heat insulating board 50, respectively. They can be connected to each other when attached. Here, in the embodiment, not only the first connection member 10 and the second connection member 12 are connected to each other by the engagement structure, but also the first connection member 10 and the second connection member are connected using the connection member 14. 12 is connected. The members 10, 12, and 14 constituting the connection unit can be formed of a resin molded product such as polypropylene (PP) or a material such as a metal, and a resin molded product is used in the embodiment. In addition, although the heat insulation board 50 can use suitably the composite material which laminated | stacked coating | covering materials, such as an aluminum alloy, on both plate | board surfaces of flat hard urethane foam, it is not limited to this.

  As shown in FIG. 1 and FIG. 4, the first connecting member 10 includes a flat plate-like first bottom portion 16 and a pair of first mounting portions 18 </ b> A that are arranged to face each other while rising from both edges of the first bottom portion 16. 18B constitutes a main body having a “C” cross section. The first connecting member 10 can be attached to the edge of the heat insulating board 50 by sandwiching the heat insulating board 50 inserted between the pair of first mounting portions 18A and 18B arranged opposite to each other in the plate thickness direction. The first connecting member 10 is configured to be elastically deformable in a direction in which both flat plate-like first mounting portions 18A and 18B are close to and away from each other. The separation width of the first mounting portions 18A and 18B is set to be the same as or slightly larger than the thickness of the heat insulating board 50 at the root portion connected to the first bottom portion 16 connecting the first mounting portions 18A and 18B. . Further, in the first connecting member 10, at least one of the first mounting portions 18A, 18B is inclined from the root or the middle to the other side, and the first mounting portions 18A, 18A, The spacing width of 18B is set to be smaller than the thickness of the heat insulating board 50. That is, when the first connecting member 10 is attached to the heat insulation board 50, the heat insulation board 50 is sandwiched between the first attachment portions 18A and 18B which are elastically deformed. In addition, in the 1st connection member 10, when attaching to the heat insulation board 50, the surface (groove surface defined by the 1st bottom part 16 and both the 1st attachment parts 18A and 18B) facing the heat insulation board 50 is called inner surface, The opposite surface is called the outer surface.

  As shown in FIGS. 1 and 4, the first connecting member 10 includes a first fastening portion 20 formed on one first attachment portion (hereinafter referred to as an outer first attachment portion) 18A and the other first attachment portion. And an engaging protrusion 22 formed on a portion (hereinafter referred to as an inner first attachment portion) 18B. The first fastening portion 20 is provided so as to protrude from the outer surface of the outer first attachment portion 18A in a direction away from the inner first attachment portion 18B, and the extending end is a first attachment portion 18A, 18B from the first bottom portion 16. It is formed in a bowl shape that bends in the extending direction (open end side of the first mounting portions 18A, 18B). The first fastening portion 20 has a root portion of the outer first attachment portion 18A (a corner portion of the outer first attachment portion 18A with the first bottom portion 16) in a direction orthogonal to the extending direction of the outer first attachment portion 18A. It is provided throughout. The engagement protrusion 22 is a protrusion formed so as to protrude from the outer surface of the inner first attachment portion 18B in a direction away from the outer first attachment portion 18A. The engagement protrusion 22 is in the direction perpendicular to the extending direction of the inner first mounting portion 18B at the root portion of the inner first mounting portion 18B (the corner portion of the inner first mounting portion 18B with the first bottom portion 16). It is provided throughout.

  As shown in FIG. 1, on the inner surface of the first mounting portion 18B, a barb 24 that prevents the heat insulating board 50 sandwiched between the first mounting portions 18A and 18B is provided. The barb 24 is a protruding piece that obliquely protrudes from the inner surface of the first mounting portion 18B toward the first bottom portion 16 side, and is provided over the entire direction perpendicular to the extending direction of the first mounting portion 18B. In the embodiment, the double barbs 24 are formed only on the inner surface of the inner first mounting portion 18B.

  As shown in FIG. 8, the first connecting members 10 face each other between the first fastening portions 20 and 20 in a state where the other first connecting members 10 and the outer surfaces of the first bottom portion 16 are in contact with each other. It is formed to do. Then, the two first fastening portions 20, 20 facing each other are connected, and the two first connecting members 10, 10 are configured to be connectable so that the open ends of the first mounting portions 18A, 18B are in opposite directions. It is. Here, when the first bottom portions 16 and 16 are brought into contact with each other with the outer surfaces of the outer first mounting portions 18A and 18A aligned with respect to the two first connecting members 10 and 10, the two first fastening portions 20 and 20 are provided. Is a symmetrical shape with the extended ends bent in opposite directions across the contact surfaces of the first connecting members 10 and 10.

   As shown in FIGS. 2 and 4, the second connecting member 12 includes a flat plate-like second bottom portion 26 and a pair of second mounting portions 28 </ b> A that are arranged to face each other while rising from both edges of the second bottom portion 26. 28B constitutes a main body having a “C” cross section. The 2nd connection member 12 is attached to the edge of the heat insulation board 50 on both sides of the heat insulation board 50 inserted between a pair of 2nd attachment part 28A, 28B arrange | positioned facing each other in the plate | board thickness direction. The second connecting member 12 is configured to be elastically deformable in a direction in which both of the plate-like second mounting portions 28A and 28B are close to and away from each other. The separation width of both the second mounting portions 28A and 28B is set to be the same as or slightly larger than the plate thickness of the heat insulating board 50 at the root portion connected to the second bottom portion 26 connecting the second mounting portions 28A and 28B. . Further, in the second connecting member 12, at least one of the pair of second mounting portions 28A, 28B is inclined from the root or the middle to the other side, and both the second mounting portions 28A on the open end side opposite to the root portion. , 28B is set to be smaller than the thickness of the heat insulating board 50. That is, when the second connecting member 12 is attached to the heat insulation board 50, the heat insulation board 50 is sandwiched between the second attachment portions 28A and 28B which are elastically deformed. In the second connecting member 12, at least one of the second attachment portions 28 </ b> A and 28 </ b> B is set to have a length extending from the second bottom portion 26 larger than the width of the first bottom portion 16 of the first connecting member 10. In addition, in the 2nd connection member 12, when attaching to the heat insulation board 50, the surface (groove surface defined by the 2nd bottom part 26 and both 2nd attachment part 28A, 28B) facing the heat insulation board 50 is called inner surface, The opposite surface is called the outer surface.

  As shown in FIGS. 2 and 4, the second connecting member 12 has a second fastening portion 30 formed on the second bottom portion 26. The second connecting member 12 has an engagement receiving portion 32 formed on one second attachment portion (hereinafter referred to as an inner second attachment portion) 28A. The second fastening portion 30 is provided so as to protrude from the outer surface of the second bottom portion 26 to the opposite side to the extending direction of the second mounting portions 28A and 28B, and the extending end is the other second mounting portion (hereinafter referred to as the outer side). It is formed in a bowl shape that bends to the 28B side (referred to as the second mounting portion). The second fastening portion 30 is entirely in the direction perpendicular to the extending direction of the second mounting portions 28A and 28B at the base portion of the second bottom portion 26 (the corner portion of the second bottom portion 26 with the inner second mounting portion 28A). Are provided.

  As shown in FIG. 2, the engagement receiving portion 32 is provided so as to protrude from the outer surface of the inner second mounting portion 28 </ b> A in a direction away from the outer second mounting portion 28 </ b> B. It is formed in a bowl shape that bends in the opposite direction to the extending direction of 28B (the open end side of the second mounting portions 28A, 28B). The engagement receiving portion 32 is set so that the space between the outer surface of the inner second mounting portion 28A and the extending end facing the outer surface is the same as or slightly larger than the plate thickness of the engagement protrusion 22 of the first connecting member 10. Has been. The engagement receiving portion 32 is positioned away from the base portion of the inner second attachment portion 28A (the corner portion of the inner second attachment portion 28A with the second bottom portion 26) by the width of the first bottom portion 16 of the first connecting member 10. The inner second mounting portion 28A is provided over the entire direction orthogonal to the extending direction. The engagement receiving portion 32 receives the engagement protrusion 22 between the extended end and the inner second mounting portion 28A in a state where the outer surface of the first bottom portion 16 is in contact with the outer surface of the inner second mounting portion 28A. Thus, the engaging projection 22 can be engaged. The first connecting member 10 and the second connecting member 12 are connected to the mounting portions 18A, 18B, and 28A from the bottom portions 16 and 26 by the engagement of the engaging protrusions 22 and the engagement receiving portions 32 that are hooked to each other. , 28B is restricted in relative displacement in the extending direction. Further, the first connecting member 10 and the second connecting member 12 are connected to the first bottom portion 16 and the outer first attaching portion 18A of the first connecting member 10 by the engagement of the engaging protrusion 22 and the engaging receiving portion 32. And a corner portion formed by the second bottom portion 26 of the second connecting member 12 and the inner second mounting portion 28A. Furthermore, when the engaging protrusion 22 of the first connecting member 10 and the engaging receiving portion 32 of the second connecting member 12 are engaged, the first fastening portion 20 of the first connecting member 10 and the second connecting member 12 are engaged. The 2nd fastening part 30 of this is comprised so that it may oppose. Here, the first fastening portion 20 of the first connecting member 10 and the second fastening portion 30 of the second connecting member 12 that face each other when the engaging protrusion 22 and the engaging receiving portion 32 are engaged are both The extending end that bends across the contact surfaces of the connecting members 10 and 12 has a symmetrical shape that faces the opposite direction.

  As shown in FIG. 2, a barb 34 is provided on the inner surface of the second mounting portion 28 </ b> A to prevent the heat insulating board 50 sandwiched between the second mounting portions 28 </ b> A and 28 </ b> B, as in the first connecting member 10. It has been. The barb 34 is a protruding piece that obliquely protrudes from the inner surface of the second mounting portion 28A toward the second bottom portion 26 side, and is provided over the entire direction orthogonal to the extending direction of the second mounting portion 28A. In the embodiment, the triple barb 34 is formed only on the inner surface of the inner second mounting portion 28A.

  As shown in FIG. 3, the connection member 14 includes a first fastening portion 20 that faces each other when the engagement protrusion 22 of the first connection member 10 and the engagement receiving portion 32 of the second connection member 12 are engaged. And the second fastening part 30 are connected. The connection member 14 includes a first flange portion 14a formed in a bowl shape on one edge of the connection member 14, and a second flange formed in a bowl shape symmetrical to the first flange portion 14a on the other edge of the connection member 14. The extending end of the “C” -shaped channel material has a cross-sectional shape that is further bent inward. The connecting member 14 hooks the first flange portion 14a against the first fastening portion 20 of the first connecting member 10 in which the engaging protrusion 22 and the engagement receiving portion 32 are engaged and disposed opposite to each other, and the first 2nd hook part 14b is hooked with respect to the 2nd fastening part 30 of 2 connection member 12, and the displacement which the 1st connection member 10 and the 2nd connection member 12 mutually separate is controlled (refer to Drawing 5 (c)). . The shape formed by the first fastening portion 20 and the second fastening portion 30 that are arranged opposite to each other by combining the first connecting member 10 and the second connecting member 12 is 2 that is arranged oppositely by combining the two first connecting members 10 and 10. The shape is the same as that formed by the two first fastening portions 20, 20. And the connection member 14 is comprised so that not only the connection of the 1st fastening part 20 and the 2nd fastening part 30 but the connection of the two 1st fastening parts 20 and 20 arrange | positioned facing each other can be used. As described above, the connecting unit of the embodiment includes the two first connecting members 10 and 10 by the connecting member 14 having the same configuration as the connecting member 14 that connects the first fastening portion 20 and the second fastening portion 30 that face each other. The first fastening portions 20 and 20 can be connected to each other.

  In this way, the connecting unit abuts the outer surface of the first bottom portion 16 and the outer surface of the inner second mounting portion 28A, engages the engaging protrusion 22 and the engagement receiving portion 32, and faces each other. By connecting the first fastening portion 20 and the second fastening portion 30 with the connecting member 14, the open ends of the mounting portions 18A, 18B, 28A, and 28B intersect the first connecting member 10 and the second connecting member 12. It is configured to be connectable in the direction of. Further, the connecting unit abuts the outer surfaces of the first bottom parts 16 and 16 and connects the first fastening parts 20 and 20 facing each other with the connecting member 14, thereby connecting the two first connecting members 10 and 10. The first mounting portions 18A and 18B are configured to be connectable in directions in which the open ends are opposite to each other.

  Next, the construction method of the duct 52 using the connection unit mentioned above is demonstrated. One edge of the heat insulation board 50 is inserted between both the first attachment portions 18A and 18B, and the first connection member 10 is insulated by sandwiching the heat insulation board 50 between the first attachment portions 18A and 18B in the thickness direction. 50 is attached to one edge (see FIG. 4). The other edge opposite to one edge of the heat insulating board 50 is inserted between the second mounting portions 28A and 28B, and the second heat insulating board 50 is sandwiched between the second mounting portions 28A and 28B in the plate thickness direction. The connecting member 12 is attached to the other edge of the heat insulating board 50. The first connecting member 10 and the second connecting member 12 that are attached to the same heat insulating board 50 are arranged on the plate surface that becomes the outside of the heat insulating board 50 when the outer first attaching portion 18A and the outer second attaching portion 28B are configured as the duct 52. The inner first mounting portion 18B and the inner second mounting portion 28A are disposed on the plate surface that is the inner side of the heat insulating board 50 (FIG. 5A). In this way, four heat insulation boards 50 to which the first connecting member 10 and the second connecting member 12 are attached are prepared.

  The outer surface of the first bottom portion 16 of the first connecting member 10 attached to the heat insulating board 50 and the outer surface of the inner second attaching portion 28A of the second connecting member 12 attached to another heat insulating board 50 are abutted. The engagement protrusion 22 of the first connection member 10 is inserted between the extended end of the engagement receiving portion 32 of the two connection member 12 and the inner second attachment portion 28A to engage with each other (FIG. 5B). ). Thereby, the outer first mounting portion 18A of the first connecting member 10 and the second bottom portion 26 of the second connecting member 12 are aligned, and the first fastening portion 20 of the first connecting member 10 and the second of the second connecting member 12 are aligned. The fastening portion 30 is disposed so as to face each other with the contact surfaces therebetween. While the first fastening part 20 is inserted into the first flange part 14a, the connecting member 14 is slid from the end face side of the connecting members 10 and 12 so that the second fastening part 30 is inserted into the second flange part 14b. By engaging the portions 14a and 14b and the fastening portions 20 and 30, respectively, the fastening members 20 and 30 are connected by the connecting member 14 (FIGS. 5C and 9). The first connecting member 10 and the second connecting member 12 are connected to each other on the inner side of the duct 52 by the engagement of the engaging protrusion 22 and the engaging receiving portion 32, and are on the outer side of the duct 52. The side is connected by a connecting member 14 that meshes with both fastening portions 20, 30. That is, since the first connecting member 10 and the second connecting member 12 are connected in the direction in which the open ends of the mounting portions 18A, 18B, 28A, 28B are orthogonal to each other, the heat insulating board to which the first connecting member 10 is attached. 50 and another heat insulation board 50 to which the second connecting member 12 is attached are assembled to each other in an orthogonal direction. Similarly, by connecting the four heat insulating boards 50 to each other by the first connecting member 10 and the second connecting member 12, a rectangular tube-shaped duct 52 is obtained (FIGS. 6A and 6B). .

  Next, the case where heat insulation board 50 is connected in series is demonstrated. The heat insulating board 50 forming the opening edge of the duct 52 assembled by the connection of the first connecting member 10 and the second connecting member 12 is sandwiched in the plate thickness direction by the first mounting portions 18A and 18B, and the opening of the heat insulating board 50 The first connecting member 10 is attached to each of the four sides of the edge (FIGS. 7 and 8). The first connecting member 10 is attached so that the first fastening portion 20 is outside the duct 52. The two first fastening portions 20 and 20 are opposed to each other with the contact surfaces of the first connecting members 10 and 10 attached to the opening edges of the different ducts 52 being brought into contact with each other. Is done. The connecting member from the end face side of the two first connecting members 10 and 10 so that one first fastening portion 20 is inserted into the first flange portion 14a and the other first fastening portion 20 is inserted into the second flange portion 14b. 14 is slid and the flanges 14a, 14b and the first fastening portions 20, 20 are engaged with each other, whereby the fastening members 20, 20 are connected by the connecting member 14 (FIG. 10). The two first connecting members 10, 10 are connected by the connecting member 14 that meshes with the two first first fastening portions 20, 20 outside the duct 52. That is, since the two first connecting members 10 and 10 are connected in the direction in which the open ends of the mounting portions 18A and 18B are opposite to each other, the duct 52 to which one of the first connecting members 10 is attached and the other Another duct 52 to which the first connecting member 10 is attached is assembled in series. In addition, in the joint of the two ducts 52 and 52 arranged in series, the part without the first connecting member 10 is sealed with aluminum tape or the like.

(Effects of Example)
Next, the operation of the embodiment will be described. According to the connecting unit of the embodiment, the first connecting member 10 can be easily attached to the edge of the heat insulating board 50 simply by inserting the heat insulating board 50 between the pair of first mounting portions 18A and 18B. Similarly, the second connecting member 12 can be easily attached to the edge of the heat insulation board 50 simply by inserting the heat insulation board 50 between the pair of second attachment portions 28A, 28B. The first connecting member 10 and the second connecting member 12 are inserted between the pair of mounting portions 18A, 18B, 28A, 28B because the return portions 24, 34 are provided on the inner surfaces of the mounting portions 18B, 28A. The barb bites into the heat insulating board 50, and it is possible to prevent displacement and disengagement with respect to the heat insulating board 50. Further, the first connecting member 10 and the second connecting member 12 sandwich the heat insulating board 50 by the elastically deformed mounting portions 18A, 18B, 28A, 28B, and therefore are not easily detached from the heat insulating board 50.

  The connecting unit simply connects the first connecting member 10 and the second connecting member 12 by engaging the engaging protrusion 22 and the engaging receiving portion 32 and connecting the first fastening portion 20 and the second fastening portion 30. Can be linked to. Then, by connecting the first connecting member 10 and the second connecting member 12, a duct 52 in which the heat insulating board 50 to which the connecting members 10, 12 are attached is assembled into a rectangular tube shape can be easily formed. Here, by engaging the engagement protrusion 22 and the engagement receiving portion 32, the inside and outside directions of the first connecting member 10 and the second connecting member 12 are determined in a normal direction, and the first fastening portion 20. And the second fastening portion 30 can be naturally positioned so as to face each other. Thus, since the flat heat insulation board 50 can be easily assembled by connecting the first connecting member 10 and the second connecting member 12, high construction accuracy is not required at the construction site, and the duct 52 Not bulky during transportation and storage of components. And, at the construction site, by connecting the first connecting member 10 and the second connecting member 12, the four heat insulating boards 50 can be assembled and formed into a rectangular tube shape. Can be created on the spot. Moreover, the magnitude | size of the duct 52 obtained by changing the dimension of the heat insulation board 50 can be changed, without changing a connection unit, and the freedom degree of construction and a duct dimension can be improved.

  The connecting unit includes the first fastening portion 20 and the first fastening portion 20 by the connecting member 14 that hooks the flange portions 14a and 14b against the first fastening portion 20 of the first connecting member 10 and the second fastening portion 30 of the second connecting member 12. By setting it as the structure which connects the 2 fastening part 30, the 1st connection member 10 and the 2nd connection member 12 can be connected more easily. Further, the connecting member 14 slides from the end face sides of the first connecting member 10 and the second connecting member 12 while inserting the fastening portions 20 and 30 corresponding to the flange portions 14a and 14b, so that the first fastening portion 20 and The 2nd fastening part 30 can be connected and a connection operation | work is very easy. Further, since the protruding engaging protrusion 22 is inserted into the hook-shaped engaging receiving portion 32 and hooked, the engaging receiving portion 22 and the engaging protruding portion 32 can be easily engaged. it can. As described above, according to the connecting unit of the embodiment, when the duct 52 is assembled, there is no need for drilling, welding, bolt fastening, or the like, and there is no need for a tool. The engagement of the receiving portion 32 and the connection of the fastening portions 20 and 30 can be performed, and the duct 52 can be easily formed.

  The connection unit can be easily connected by arranging the heat insulation boards 50 in series using the first connection member 10 for assembling the heat insulation board 50 into a rectangular tube shape, and the duct construction can be performed with a small number of parts. The degree can be improved. In addition to connecting the two first connecting members 10 and 10 in series, the heat insulating board 50 is connected in series, and the first connecting members 10 and 10 attached to the opening edge of the duct 52 formed in a rectangular tube shape. By connecting each other, the plurality of ducts 52 can be connected in series so as to communicate with each other. Further, as a member for connecting the first fastening portions 20 and 20 of the two first connecting members 10 and 10, the first fastening portion 20 of the first connecting member 10 and the second fastening portion 30 of the second connecting member 12 are used. The connecting member 14 to be connected can be used in common, and the duct 52 (heat insulating board 50) can be easily connected in series with a small number of parts.

(Example of change)
For example, the present invention can be modified as follows.
(1) The connection between the first fastening portion and the second fastening portion, or the connection between the first fastening portions is not limited to the connection by the connection member as in the embodiment, but by other configurations such as adhesion, screwing or bolt fastening. There may be.
(2) The engagement receiving portion is not limited to the hook shape as in the embodiment, and for example, the engagement protrusion is inserted into the opening formed in the engagement receiving portion formed in a flat plate shape and engaged. May be.
(3) The present invention is not limited to a configuration in which a flat board is combined by connecting the first connecting member and the second connecting member. For example, a board having a cross-section “L” shape is combined with a connecting unit to form a duct, A duct may be formed by combining a flat board and a flat board in a connecting unit.
(4) A plurality of boards may be arranged by connecting the first connecting members to form a wall on one side of the duct.
(5) After creating a long object in which a plurality of boards are arranged in series by connecting the first connecting members, the long object is assembled into a rectangular tube by connecting the first connecting member and the second connecting member. May be.
(6) Two first connecting members are attached to one board and two boards are prepared. Similarly, two second connecting members are attached to one board and two boards are also prepared. . It is also possible to combine these four boards into a connecting unit. That is, only two first connecting members are attached to the two boards, respectively, and only two second connecting members are attached to the other two boards.

  Not only the duct assembled by the connection of the first connecting member and the second connecting member, but also a duct formed in a rectangular tube shape in advance is connected in series so as to communicate with each other by connecting the first connecting members. It is also possible to do.

The present invention can also be expressed as follows.
A connecting unit constituting a duct formed in an annular shape with four boards (plate members) as walls,
A main body that covers the end face of the board forming one wall and sandwiches and fixes the side edge of the board with a pair of second mounting parts (class mounting part), and a surface that forms the duct inner wall of the second mounting part. And a second connecting member having a second fastening portion (classified fastening portion) extending in a direction intersecting with a side wall of another board along a surface forming the duct inner wall of the second mounting portion. (Class connection member),
A main body that covers an end surface of another board adjacent to the board forming the wall and sandwiches and fixes a side edge of the board with a pair of first mounting portions (second-type mounting portions); and an engagement receiving of the second connecting member An engagement protrusion that extends from a first attachment portion that forms a surface forming a duct inner wall, and extends in a direction intersecting with a duct side wall of another board along an end surface of the main body. A first coupling member (second class coupling member) having a first coupling section (second class coupling section) positioned so as to be capable of being coupled with the coupling section;
The first connecting member and the second connecting member may be a connecting unit that forms a corner portion of a duct by a connecting member that fastens the first fastening portion and the second fastening portion.

10 1st connection member (connection member), 12 2nd connection member, 14 connection member, 16 1st bottom part,
18A outer first mounting portion (first mounting portion, mounting portion),
18B inner first mounting portion (first mounting portion, mounting portion), 20 first fastening portion (fastening portion),
22 engagement protrusions, 24 turnovers, 26 second bottom, 28A inner second attachment part (second attachment part),
28B outer side second attachment portion (second attachment portion), 30 second fastening portion, 32 engagement receiving portion,
50 Insulation board (board), 52 Duct

Claims (10)

A connecting unit used to connect plate-like boards to form a rectangular tube-shaped duct,
A first connecting member that can be attached to the edge of the board by sandwiching the board that forms the wall of the duct between a pair of first attachment parts disposed opposite to the edge of the first bottom portion in the thickness direction;
A second connecting member that can be attached to the edge of the board by sandwiching the board in a plate thickness direction between a pair of second attachment portions that are arranged opposite to the edge of the second bottom portion;
The first connecting member is
A first fastening portion formed so as to protrude from the outer surface of one of the first mounting portions;
An engaging protrusion formed to protrude from the outer surface of the other first mounting portion,
The second connecting member is
An engaging protrusion is formed on the outer surface of one second mounting portion so as to be engageable with the engaging protrusion in a state where the outer surface of the first bottom portion is in contact with the outer surface of the one second mounting portion. An engagement receiving portion that regulates relative displacement between the first connecting member and the second connecting member in the extending direction of each mounting portion from each bottom portion,
A second fastening portion that is formed so as to protrude from the outer surface of the second bottom portion, and that faces the first fastening portion in a state in which the engagement protrusion and the engagement receiving portion are engaged;
The outer surface of the first bottom portion and the outer surface of the one second mounting portion are brought into contact with each other to engage the engaging protrusion and the engagement receiving portion, and the first fastening portion and the second facing each other. A coupling unit comprising: a coupling portion configured to connect the first coupling member and the second coupling member in such a direction that the open ends of the mounting portions intersect with each other. Including a connecting member for connecting the first fastening portion and the second fastening portion opposed to each other;
The connecting member is
The first fastening part formed in a bowl shape on one edge of the connection member and protruding from the outer surface of one first mounting part and bent in the extending direction of the first mounting part from the first bottom part A first collar that can be hooked onto
In the second fastening portion formed in a flange shape symmetrical to the first flange portion on the other edge of the connection member, protruding from the outer surface of the second bottom portion and bent toward the other second attachment portion side The connecting unit according to claim 1, further comprising a second hook part that can be hooked. The first connecting member is formed in such a manner that the first fastening portions face each other in a state where the first connecting member and the outer surfaces of the first bottom portion are in contact with each other.
The connection unit according to claim 1 or 2, wherein two first fastening portions facing each other are connected, and the two first connection members are configured to be connectable so that the open ends of the first attachment portions are opposite to each other. Including a connecting member for connecting the first fastening portions of the two first connecting members;
The connecting member for connecting the first fastening parts is
The connecting member is formed in a bowl shape on one edge, and protrudes from the outer surface of one of the first mounting portions of one of the two first connecting members to protrude from the first bottom portion of the first mounting portion. A first hook part that can be hooked on the first fastening part formed in a hook shape that bends in the extending direction;
Formed on the other edge of the connecting member in a bowl shape symmetrical to the first flange part, the first connecting member of the other of the two first connecting members protrudes from the outer surface of one of the first mounting parts. The connecting unit according to claim 3 , further comprising: a second hook part that can be hooked on the first fastening part formed in a hook shape that bends in the extending direction of the first attachment part from the bottom part .   The said engagement receiving part is formed in the hook shape which protrudes from the outer surface of one 2nd attachment part, and bends in the opposite direction to the extension direction of the 2nd attachment part from a 2nd bottom part. The connecting unit according to claim 1. The connection unit according to any one of claims 1 to 5, wherein a barb is formed on an inner surface of at least one of the pair of attachment portions. A first connecting member is attached to one edge of a plate-like board serving as a wall of the duct, sandwiched in the thickness direction by a pair of first attachment portions, and a plate is attached to the other edge of the board by a pair of second attachment portions. Attach the second connecting member across the thickness direction,
In the first connecting member, the first bottom part connecting the first attaching parts is brought into contact with one second attaching part of the second connecting member attached to a different board, and the first connecting member has a first part. Engage the engagement protrusion formed on the attachment portion with the engagement receiving portion formed on the second attachment portion of the second connecting member attached to a different board,
The second fastening formed on the second bottom part connecting between the second attaching parts in the first connecting part formed on the first attaching part of the first connecting member and the second connecting member attached on a different board. And the first engagement portion and the second engagement portion are connected to each other by engaging the engagement protrusion and the engagement receiving portion,
A duct construction method characterized in that a rectangular tube-shaped duct is assembled by coupling a first coupling member and a second coupling member attached to separate boards. The duct according to claim 7, wherein the first fastening portion of the first connecting member and the second fastening portion of the second connecting member attached to different boards are connected by a connecting member that is hooked to both fastening portions. Construction method. The first connecting member is attached to an opening edge of a duct assembled by connecting the first connecting member and the second connecting member,
The combined For the first bottom portions of the first connecting member attached to the opening edge of the different ducts, by connecting the first fastening portion facing each other, according to claim 7 or 8, wherein was set to connect the duct in series Duct construction method. The duct construction method according to claim 9 , wherein the first fastening portions of the first connecting members attached to the opening edges of different ducts are connected to each other by connection members that are hooked to both fastening portions.

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