JP4787767B2 - Duct installation structure of building and duct installation method - Google Patents

Description

  The present invention relates to a duct installation structure and a duct installation method for a building, and relates to a technique for suitably installing a ventilation duct (venting pipe) used in a ventilation / air conditioning system or the like.

A building such as a house is equipped with a ventilation / air-conditioning system and the like, and in such a system, a ventilation duct is installed in a space behind the ceiling. In this case, since the duct installation work in the ceiling space is complicated, various techniques have been proposed to improve the installation work. For example, in Patent Document 1, in a unit-type building, a ventilation duct (flexible duct) is fixed to a ceiling surface material, and the ceiling surface material is used as a holding member for the duct, thereby simplifying the field work of installing the duct. It tries to become.
JP-A-11-101696

  By the way, in recent years, it has become mandatory to install mechanical ventilation equipment in houses, and the number of houses where duct type ventilation equipment is installed is increasing. In such ventilation equipment, air is always conveyed by a ventilation duct. It has become. Under such circumstances, it is considered that the continuous use of the ventilation equipment causes deterioration of the ventilation duct and accumulation of dust and the like, and accordingly, needs for replacement of the ventilation duct are increased. In other words, the duct installation work accompanying the duct replacement is forced other than when the building is newly constructed. In this case, the existing technique has a problem that the installation work is still complicated at the time of duct replacement (renovation).

  The main object of the present invention is to provide a building duct installation structure and a duct installation method capable of easily and appropriately performing a replacement operation of a ventilation duct.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary. In the following, in order to facilitate understanding, a corresponding configuration example in the embodiment of the invention is appropriately shown in parentheses, etc., but is not limited to the specific configuration shown in parentheses.

  The present invention is a duct installation structure of a building in which a ventilation duct (air supply duct 35) that circulates air is installed, and a duct housing member that houses the ventilation duct (outside duct 41, The accommodation guide 53) is installed along the duct installation route.

  According to the above configuration, since the ventilation duct is accommodated in the duct accommodation member provided along the duct installation path, when replacing the ventilation duct, the old ventilation duct is slid while sliding in the accommodation member. Is withdrawn or a new ventilation duct is inserted. In such a case, the duct can be easily taken in and out. In that case, a ventilation duct can be installed appropriately in a desired duct installation path.

  The duct housing member is provided with a plurality of projecting portions (protruding portion 41a, projecting portion 53a) projecting inward of the housing member at a contact portion (for example, at least the bottom inner surface) with the ventilation duct. Good. According to this configuration, the ventilation duct and the duct housing member are in contact with each other by the tip portion of the protrusion. In this case, the contact area of both members is smaller than that of a configuration having no protrusions (that is, a configuration in which the contact portion with the ventilation duct is planar in the duct housing member). Therefore, the frictional resistance when the ventilation duct is moved in the duct housing member is reduced, and as a result, workability at the time of duct replacement can be improved.

  In particular, the protrusion may be a protrusion (protrusion 41a) protruding inside the duct housing member and extending in the longitudinal direction of the housing member. In this case, since the protrusion (projection) is continuously formed along the duct moving direction, the end of the ventilation duct to be newly inserted is not caught by the protrusion when replacing the duct. The ventilation duct can be moved more smoothly.

  The duct housing member may be an outer duct (outer duct 41) having a larger diameter than the ventilation duct. According to this configuration, since the periphery of the ventilation duct is completely covered by the outer duct, even when the ventilation duct is installed in a relatively narrow space such as a ceiling space, the ventilation duct hits other members when replacing the duct. Can be prevented.

  It is preferable that a closing member (end cover 51) for closing the gap portion is provided in an inner and outer gap portion between the ventilation duct and the outer duct. The closing member may be provided at a plurality of locations, for example, at both end portions of the outer duct. In this case, since the space between the outer peripheral surface of the ventilation duct and the inner peripheral surface of the outer duct is a closed space, even if the ventilation duct is damaged and the carrier air inside it leaks outside the ventilation duct, Carrier air leaks are retained in the outer duct. Therefore, even when the ventilation duct is broken, desired air can be conveyed.

  A duct in which a beam through hole (beam through hole 22a) is formed in a beam material (ceiling beam 22 and floor beam 23) such as a ceiling beam or a floor beam of a building, and the ventilation duct is installed through the beam through hole. In the installation structure, a support fitting (duct insertion fitting 48) provided with a cylindrical portion (cylinder portion 48a) communicating with the beam through hole is fixed to the beam member, and the duct housing member is connected to the support fitting. It is good to have. Thereby, when installing the ventilation duct through the beam material of the building, the duct housing member can be attached by the support fitting fixed to the beam through hole portion, and the housing member is attached to the building. It can be done easily.

  Here, when the duct installation structure of the present invention is applied to a unit type building (unit type building 10) formed by combining a plurality of building units (building unit 20) manufactured in a factory, the duct is used. The housing member may be attached to the building unit at the factory manufacturing stage of the building unit. In this case, if the duct housing member is pre-installed at the factory, the subsequent duct installation work at the construction site can be easily performed. That is, the on-site work can be simplified.

  The duct housing member is installed on the back side of a plate material (ceiling material 42, etc.) installed on the ceiling, floor, etc. of the building. On the plate material, the vicinity of the end of the duct housing member is accessible from the indoor side. An opening (opening 43, inspection port 45) may be provided. In addition, it is good for the opening part to provide the cover body etc. which can be attached or detached from the indoor side (the blowing grill 44, the inspection door 46). According to this configuration, replacement of the ventilation duct and the like can be easily performed through the opening.

  Further, as an invention relating to a method for installing a duct in a building, a duct housing member (outer duct 41) capable of housing a ventilation duct (a supply duct 35, a housing guide 53) is disposed in the duct installation place along the duct installation path. The ventilation duct is installed while moving in the duct housing member.

  According to the above duct installation method, when the ventilation duct is replaced, the old ventilation duct is pulled out while sliding in the housing member, or a new ventilation duct is inserted. In such a case, the duct can be easily taken in and out. In that case, a ventilation duct can be installed appropriately in a desired duct installation path.

  In addition, regarding the duct housing member, as described above, a plurality of projecting portions (protruding portion 41a, projecting portion 53a) projecting inside the housing member at the contact portion with the ventilation duct (for example, at least the bottom inner surface). Should be provided. This protrusion part is good in it being the protrusion part (protrusion part 41a) which protrudes inside a duct accommodating member and is extended in the longitudinal direction of the said accommodating member. The duct housing member may be an outer duct (outer duct 41) having a larger diameter than the ventilation duct.

  When installing a ventilation duct, there are a case where (1) the ventilation duct is replaced with a new one, and (2) a ventilation duct is newly installed when a building is newly constructed.

  (1) When exchanging old and new ventilation ducts, a new duct (unused duct 35B) is connected to one end of an existing duct (used duct 35A) that has already been installed. The new duct may be housed in the duct housing member by pulling the other end.

  (2) When a ventilation duct is newly installed, a string-like guide wire (guide wire Y) is disposed in advance in the duct housing member in a state where both ends are pulled out from both ends of the housing member, One end side of the guide wire is connected to the ventilation duct, and in this state, the other end side of the guide wire is pulled to accommodate the ventilation duct in the duct housing member.

  In any of the above (1) and (2), a simple duct installation work can be realized by moving the air duct while sliding in the duct housing member. In particular, in the case of (1), the existing duct can be taken out and the new duct can be installed at the same time, and the workability is further improved.

  A brush member for cleaning the duct (brush member 61) is attached to the tip of the ventilation duct to be newly accommodated in the duct housing member, and the ventilation duct is installed by moving the inside of the duct housing member in that state. Good. As a result, when the duct is installed (including when the old and new parts are replaced, and when the duct is newly installed), the inside of the duct housing member can be cleaned simultaneously with the installation of the duct, that is, dust or dirt can be swept out.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings. In this embodiment, it is embodied in a two-story unit type building constructed by a steel frame ramen unit construction method, and an outline of the unit type building 10 is shown in FIG. The unit type building 10 includes a building main body 11 formed by combining a plurality of building units 20 and a roof 12 disposed above the building main body 11. In addition, the building unit 20 used for the unit type building 10 is manufactured in advance in a factory, and then transported to a building site by a truck or the like.

  FIG. 8 is a perspective view showing the configuration of the building unit 20. In the building unit 20, columns 21 are arranged at the four corners, and the upper end and the lower end of each column 21 are connected by four ceiling beams 22 and floor beams 23, respectively. A rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of a square tube-shaped square steel. Moreover, the ceiling beam 22 and the floor beam 23 are made of channel steel having a U-shaped cross section, and are installed so that the openings thereof face each other. The ceiling large beam 22 (specifically, a grooved steel web) is provided with beam through holes 22a having a diameter of about 100 mm at a plurality of locations.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged between the large floor beams 23 on the long sides of the building unit 20 at predetermined intervals. The ceiling beam 25 and the floor beam 26 are horizontally provided at the same interval and at positions corresponding to the top and bottom. Although illustration is omitted, the ceiling surface material is supported by the ceiling beam 25 and the floor material is supported by the floor beam 26.

  The unit building 10 of this embodiment employs a central ventilation system (also referred to as a whole building ventilation system), and ventilation equipment such as ventilation units and air supply ducts are installed in the first floor ceiling back space and the second floor ceiling back space. Has been. Hereinafter, the central ventilation system will be described in detail. In addition, each ventilation equipment of the 1st floor ceiling back space and the 2nd floor ceiling back space is substantially the same, and the structure is shown in FIG. FIG. 1 is a plan view showing a configuration of a ventilation system in a building ceiling (for example, the first floor ceiling).

  In FIG. 1, the first floor portion of the building is composed of six building units 20, and one of the building units 20 is provided with a ventilation unit 31. The ventilation unit 31 is configured as a heat exchange type ventilation unit, and includes a heat exchanger, an electric fan, a suction grill, a filter, and the like as is well known. Although illustration is omitted, for example, the electric fan includes an air supply fan for sucking outdoor air and supplying it to the room, and an exhaust fan for sucking indoor air and discharging it to the outside, In the heat exchanger, heat exchange is performed between the outside air sucked by the air supply fan and the indoor air sucked by the exhaust fan. The suction grille is provided exposed on the ceiling surface, and can be attached and detached from the indoor side. The ventilation unit 31 can be provided with an ion generator, a pollen removal filter, and the like.

  An outside air duct 33 and an exhaust duct 34 are connected to the ventilation unit 31, and outside air (fresh air) is introduced from the outside through the outside air duct 33, and dirty air, moisture, etc. are discharged outside through the exhaust duct 34. It has come to be. Similarly, a plurality of air supply ducts 35 are connected to the ventilation unit 31. One end of each of these air supply ducts 35 is connected to the ventilation unit 31 and the other end is connected to a blowout chamber 37 provided in each room to be ventilated. Each air supply duct 35 is installed between adjacent building units 20 through a beam through hole 22 a (see FIG. 7) provided in the ceiling beam 22. In FIG. 1, the installation location of the beam through hole 22a is indicated by an alternate long and short dash line.

  Since the air supply duct 35 is a duct that conveys fluid (air), it is not preferable that the duct 35 is bent sharply. This is because if there is a sharp bend, excessive pressure loss occurs during air conveyance, leading to a decrease in air volume and an increase in fan energy consumption. Therefore, the duct installation path is set with a curvature as large as possible. In this respect, in the unit type building 10, since the installation of the beam through hole 22a is restricted, it is possible to perform duct installation with a small pressure loss based on a straight line.

  In the present embodiment, in particular, a structure in which the air supply duct 35 is a double pipe is adopted, and the duct 35 is accommodated in the outer duct 41 having a larger diameter. The outline is shown in FIG.

  As shown in FIG. 2, the ventilation unit 31 and the blowout chamber 37 are installed on the ceiling material 42, and the air supply duct 35 is provided with both ends connected to them. The ceiling member 42 is provided with an opening 43, and a blow grill 44 is attached to the opening 43. The blow-out grill 44 constitutes a blow-out port for blowing out the supply air fed through the supply duct 35 and the blow-out chamber 37 into the room, and is provided integrally with the blow-out chamber 37. . The blow-out grill 44 can be removed from the indoor side together with the blow-out chamber 37. The ceiling member 42 is provided with an inspection port 45 in the vicinity of the connecting portion between the ventilation unit 31 and the air supply duct 35, and the inspection port 45 is provided with an inspection door 46 that can be opened indoors. By removing the blowout chamber 37 or opening the inspection door 46, the space behind the ceiling can be accessed.

  Almost all of the air supply duct 35 (parts other than the vicinity of both ends) is accommodated in the outer duct 41. The outer duct 41 is provided along a predetermined duct installation path in the space behind the ceiling. Both the air supply duct 35 and the outer duct 41 are configured by flexible piping. The diameter of the air supply duct 35 is, for example, 70 mm, and the diameter of the outer duct 41 is, for example, 100 mm.

  A plurality of fixing brackets 47 are attached to the ceiling member 42 for each outer duct 41, and the outer duct 41 is fixed by the fixing bracket 47. At this time, as shown in FIG. 1, the outer duct 41 is installed so as not to be excessively bent, and fixing brackets 47 are attached at intervals that can maintain the installed state.

  FIG. 3 shows a cross-sectional configuration of the outer duct 41. The outer duct 41 is a pipe having a circular cross section, and a plurality of protrusions 41a are provided on the inner peripheral surface thereof. The plurality of protrusions 41a are provided at equal heights toward the center of the circle and at equal intervals in the circumferential direction, and the substantial inner diameter dimension of the outer duct 41 by these protrusions 41a, that is, The inner diameter required to accommodate the air supply duct 35 is reduced.

  In a state in which the air supply duct 35 is accommodated in the outer duct 41, the air supply duct 35 is held in a state of being in contact with only the tip end portion of each protrusion 41a. In this case, compared with a configuration in which the protrusion 41 a is not provided in the outer duct 41, the contact portion between the air supply duct 35 and the outer duct 41 is reduced, and the air supply duct 35 is moved in the outer duct 41. The frictional resistance can be reduced.

  In addition, a duct insertion fitting 48 is attached to the ceiling beam 22 in accordance with the beam through hole 22a through which the air supply duct 35 is inserted, and the structure thereof is shown in FIG. The duct insertion fitting 48 has a cylindrical portion 48a having an inner diameter dimension substantially the same as the outer diameter dimension of the outer duct 41, and a flange portion 48b formed at one end of the cylindrical portion 48a. The duct insertion metal fitting 48 is fixed with screws or the like in a state where the opening positions of the beam through hole 22a and the cylindrical portion 48a are aligned and the flange portion 48b is in contact with the inner surface of the web of the ceiling large beam 22. It has become.

  Here, in two adjacent building units 20, a gap of about 100 mm is formed between the ceiling beams 22 but the outer duct 41 is installed so as to straddle the gap. In such a case, one outer duct 41 (continuous duct) is installed for each air supply duct 35.

  However, it is also possible to divide and provide the outer duct 41 for each building unit 20 and install another connection pipe in the gap portion between the ceiling beams 22. In the case of this configuration, a connection pipe having substantially the same diameter as the outer duct 41 is provided in the gap portion between the ceiling beams 22, and the air supply duct 35 is accommodated in the connection pipe.

  The air supply duct 35 can be protected by accommodating the air supply duct 35 in the outer duct 41 and forming a double pipe as described above. Further, when the air supply duct 35 is to be replaced, the duct replacement work can be easily performed by using the outer duct 41 as a guide passage.

  Next, the procedure for replacing the air supply duct 35 will be described with reference to FIG. Here, for convenience of explanation, the used air supply duct 35 used until the replacement is referred to as “used duct 35A”, and the unused air supply duct 35 to be newly used from now on is referred to as “unused duct 35B”. Describe.

  First, as shown in FIG. 5A, the inspection door 46 is opened to allow access to the ceiling space from the inspection port 45. Then, duct disconnection work is performed through the inspection port 45. That is, the end of the used duct 35 </ b> A to be replaced (the unit end on the left end in the figure) is separated from the ventilation unit 31. Moreover, the blowout chamber 37 installed on the ceiling material 42 is removed, and the access to the space behind the ceiling from the opening 43 is made possible. Then, the duct is cut off through the opening 43. That is, the end of the used duct 35 </ b> A (the chamber end on the right end in the figure) is separated from the blowout chamber 37.

  Next, as shown in FIG.5 (b), the edge part of the unused duct 35B is connected to the chamber side edge part of the used duct 35A. At this time, the ducts 35A and 35B are connected using, for example, an adhesive tape or a connecting jig.

  After that, as shown in FIG. 5C, the unit side end of the used duct 35A is pulled from the inspection port 45, and the used duct 35A is gradually dragged out to the indoor side. As a result, the unused duct 35B gradually enters the outer duct 41 by being pulled by the used duct 35A. At this time, the used duct 35A and the unused duct 35B are in contact with only the tips of the protrusions 41a in the outer duct 41, and smoothly slide and move in a low friction state.

  And when the front-end | tip part of the unused duct 35B is pulled out to the ventilation unit 31 side of the outer side duct 41, the used duct 35A and the unused duct 35B will be cut off, and both ends of the unused duct 35B will be connected to the ventilation unit 31 and the blowout chamber. 37 respectively. Thereafter, the blowout chamber 37 is returned to the original installation place, and the inspection door 46 is closed. This completes a series of duct replacement operations.

  According to the duct replacement work as described above, the used duct 35A is taken out and the unused duct 35B is installed at the same time. Therefore, workability can be improved as compared with the case where these operations are performed individually.

  In addition to the replacement of the old and new ducts, the duct installation work can be facilitated by using the outer duct 41 also when the air supply duct 35 is installed when the building is newly constructed. The installation work procedure of the air supply duct 35 will be described with reference to FIG.

  When building a new building, each building unit 20 is manufactured in a factory, and an outer duct 41 is attached to a ceiling member 42 of each building unit 20 at the time of manufacturing the factory. At this time, as shown in FIG. 6A, a string-shaped guide wire Y is disposed in advance in the outer duct 41, and both ends thereof are exposed outward from the outer duct 41. Then, after each building unit 20 is transported to the building site, when the air supply duct 35 (new duct) is installed at the building site, the end of the guide wire Y is supplied as shown in FIG. One end of the air duct 35 is connected.

  After that, as shown in FIG. 6C, the end portion (free end side) of the guide wire Y is pulled from the inspection port 45, and the air supply duct 35 is gradually dragged out to the indoor side. Thereby, the air supply duct 35 gradually enters the outer duct 41. At this time, the air supply duct 35 is in contact with only the tip of each protrusion 41a in the outer duct 41, and smoothly slides in a low friction state.

  According to the embodiment described in detail above, the following excellent effects can be obtained.

  Since the air supply duct 35 is accommodated in the outer duct 41 provided along the duct installation path in the duct installation location of the unit building 10 (the ceiling space in this embodiment), the air supply duct 35 is replaced with an old one. When the air supply duct 35 is newly installed in the case of building a new building or the like, the old air supply duct 35 is pulled out while sliding in the outer duct 41 or a new air supply duct 35 is inserted. In such a case, the duct can be easily taken in and out. At that time, the air supply duct 35 can be properly installed in a desired duct installation path.

  For example, when the air supply duct 35 deteriorates due to continuous use of the ventilation system or dust or the like accumulates inside the duct, and the air supply duct 35 is replaced accordingly, the replacement work is performed. It can be done easily.

  Since the outer duct 41 is formed with a protrusion 41a that protrudes inward and extends in the longitudinal direction of the duct 41, the frictional resistance when the air supply duct 35 is moved in the outer duct 41 is reduced, and as a result, when the duct is replaced. The workability such as can be improved. In particular, since the protrusion 41a is formed continuously along the duct moving direction, the end of the air supply duct 35 to be newly inserted is not caught by the protrusion 41a when the duct is replaced. The duct 35 can be moved more smoothly.

  Since the outer duct 41 having a diameter larger than that of the air supply duct 35 is used as the duct housing member, the periphery of the air supply duct 35 is completely covered by the outer duct 41. Therefore, even when the air supply duct 35 is installed in a relatively small space such as a space behind the ceiling, the air supply duct 35 is prevented from hitting other members (ceiling beam or floor beam) when replacing the duct. it can. Further, since the air supply duct 35 is accommodated in the outer duct 41, a heat retaining effect of the air supply duct 35 can be expected. Furthermore, the effect which suppresses that the sound which generate | occur | produces when air passes the inside of the air supply duct 35 leaks to the indoor side can also be anticipated.

  Since the outer duct 41 is attached to the building unit 20 at the factory manufacturing stage of the building unit 20, duct installation work at a building site can be easily performed. That is, the on-site work can be simplified.

  Since the duct insertion fitting 48 communicating with the beam through hole 22a is fixed to the ceiling beam 22 and the outer duct 41 is connected to the duct insertion fitting 48, the outer duct 41 can be easily attached to the unit building 10. .

  Since an opening (opening 43, inspection port 45) that can be accessed from the indoor side is provided near the end of the outer duct 41 in the ceiling material 42, the air supply duct 35 can be easily replaced through the opening. be able to.

  The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  As shown in FIG. 9, an end cover 51 for closing the gap portion is provided in an inner and outer gap portion between the air supply duct 35 and the outer duct 41. The end cover 51 is provided at a plurality of locations, for example, at both end portions of the outer duct 41. In this case, since the space between the outer peripheral surface of the air supply duct 35 and the inner peripheral surface of the outer duct 41 is a closed space, the air supply duct 35 is temporarily damaged, and the transported air inside the air supply duct 35 is outside the air supply duct 35. Even if it leaks, the leakage of the carrier air is stopped in the outer duct 41. Therefore, even when the air supply duct 35 is damaged, the desired air can be conveyed.

  In the above embodiment, the outer duct 41 is used as the duct housing member, and the air supply duct 35 is housed in the outer duct 41 to form a double piping structure, but this configuration is changed. For example, as shown in FIG. 10, a groove-shaped accommodation guide 53 having an open upper portion may be used as the duct accommodation member, and the air supply duct 35 may be accommodated in the accommodation guide 53. In this case, it is preferable that a plurality of protrusions 53 a that protrude inward of the accommodation guide 53 are provided on the inner surface of the bottom portion that is a contact portion with the air supply duct 35. The protrusions 53a may be protrusions extending in the longitudinal direction of the duct, or may be a large number of protrusions provided at equal intervals in the vertical and horizontal directions on the inner surface side of the housing guide 53.

  Also in the configuration of FIG. 10, similarly to the configuration using the outer duct 41 as the duct housing member, the air supply duct 35 can be smoothly taken in and out at the time of duct replacement, and as a result, workability at the time of duct replacement can be improved. . Further, by providing a plurality of protrusions 53a in the accommodation guide 53, friction resistance is reduced when the air supply duct 35 is moved in the accommodation guide 53, and the air supply duct 35 is moved more smoothly. Can do.

  It is also possible to clean the inside of the duct housing member (the outer duct 41 and the housing guide 53) simultaneously with the installation of the air supply duct 35 when the duct is replaced. That is, as shown in FIG. 11, a brush member 61 for cleaning the inside of the duct is attached to the tip of the air supply duct 35 (a new air duct to be accommodated), and in this state, the inside of the duct accommodation member is moved and supplied. An air duct 35 may be installed. The brush member 61 includes an annular attachment portion 61a attached to the outer peripheral surface of the air supply duct 35, and a hair bundle portion 61b provided radially on the attachment portion 61a. By attaching the brush member 61 to the air supply duct 35, when the duct is installed (including when the old and new parts are replaced and when newly installed), the duct housing member is cleaned simultaneously with the installation of the duct, that is, dust, dirt, etc. Sweeping can be performed.

  A bellows pipe can be used as the outer duct 41. In this case, by using the bellows pipe, the duct 41 can be installed without difficulty even when the duct 41 is bent.

  During the installation work of the air supply duct 35, the air supply duct 35 can be accommodated in the outer duct 41 by using a remotely controlled radio control device or a robot. That is, in this case, the front end portion of the air supply duct 35 is connected to a radio control device, a robot, or the like, and the radio control device, the robot, or the like is moved in this state to accommodate the air supply duct 35 in the outer duct 41.

  In the above-described embodiment, the configuration in which ventilation equipment such as an air supply duct is installed in the space behind the ceiling of the building has been described. It may be configured to. In this case, an outer duct or the like as a duct housing member is disposed in the underfloor space or the wall space, and the air supply duct is accommodated inside the outer duct or the like.

  In the above embodiment, the installation structure and the installation method of the ventilation duct used in the building ventilation system have been described, but the present invention can also be applied to other systems. For example, the present invention may be embodied as an installation structure and an installation method of an air conditioning duct used in a building air conditioning system.

  In the above embodiment, an example of application to a unit-type building has been described. However, the present invention is also applied to a building having another structure such as a building constructed by a steel frame construction method or a building constructed by a conventional wooden construction method. can do.

The top view which shows the structure of the ventilation system installed behind a building ceiling. The front view which shows the duct installation state of a building ceiling back. Sectional drawing which shows the structure of an outer side duct. The figure which shows the duct installation structure between two adjacent ceiling beams. Schematic for demonstrating the exchange work procedure of an air supply duct. Schematic for demonstrating the installation work procedure of an air supply duct. The perspective view which shows the outline | summary of a unit type building. The perspective view which shows the structure of a building unit. Sectional drawing which shows the duct installation structure in another embodiment. Sectional drawing which shows the duct installation structure in another embodiment. The perspective view which shows the structure in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Unit type building, 20 ... Building unit, 21 ... Column, 22 ... Ceiling girder, 22a ... Beam through-hole, 23 ... Floor girder, 31 ... Ventilation unit, 35 ... Air supply duct, 37 ... Outlet chamber, 41 ... Outside Duct, 41a ... protruding portion, 48 ... duct insertion metal fitting, 48a ... cylindrical portion, 51 ... end cover, 53 ... storage guide, 53a ... projection, 61 ... brush member, Y ... guide wire.

Claims (11)

In the duct installation structure of the building where the ventilation duct that circulates air inside is installed,
A duct housing member for housing the ventilation duct is provided along the duct installation path at the duct installation location ,
The duct housing member is provided with a plurality of protrusions that protrude inward of the housing member and extend continuously in the longitudinal direction of the housing member,
The building duct installation structure according to claim 1, wherein the ventilation duct is movable in contact with only a tip portion of the protruding portion within the duct housing member . A plurality of the duct accommodating members are installed on the back side of the plate material installed on the ceiling or floor of the building,
The duct housing member is installed by being bent at a predetermined position with a straight line as a base tone, and is fixed to the plate member by a plurality of fixing brackets at intervals that can maintain the installation state, and one end of the plurality of duct housing members is The building duct installation structure according to claim 1, which is bundled . It said duct accommodating member, the duct installation structure of a building according to claim 1 or 2 which is the outer duct of larger diameter than the ventilation ducts. The building duct installation structure according to claim 3 , wherein a closing member for closing the gap portion is provided in an inner and outer gap portion between the ventilation duct and the outer duct. A beam installation structure in which a beam through hole is formed in a beam material such as a ceiling beam or a floor beam of a building, and the ventilation duct is installed through the beam through hole,
Said beam member, said support bracket to the cylindrical portion is provided which communicates with the beam through hole is fixed, according to the any one of claims 1 to 4 duct housing member is connected to the support bracket Building duct installation structure. It is a duct installation structure applied to a unit type building formed by combining a plurality of building units manufactured in a factory,
The building installation structure according to any one of claims 1 to 5 , wherein the duct housing member is attached to the building unit at a factory manufacturing stage of the building unit. While the duct housing member is installed on the back side of a plate material installed on the ceiling, floor, etc. of the building, an opening that can be accessed from the indoor side is provided near the end of the duct housing member in the plate material. The duct installation structure of the building as described in any one of Claims 1 thru | or 6 . A duct installation method for installing a ventilation duct for circulating air inside a building,
At the duct installation location, a duct housing member capable of housing the ventilation duct is attached first along the duct installation path,
A brush member for cleaning the inside of the duct is attached to the tip of the ventilation duct to be newly accommodated in the duct accommodation member, and the ventilation duct is installed by moving the inside of the duct accommodation member in that state. How to install a duct in a building. It is a duct installation method when replacing the ventilation duct between old and new,
The building according to claim 8 , wherein a new duct is connected to one end side of an existing duct that has already been installed, and in this state, the other end side of the existing duct is pulled to house the new duct in the duct housing member. Duct installation method. A duct installation method for newly installing the ventilation duct,
In the duct housing member, a string-shaped guide wire is arranged in advance in a state where both ends are pulled out from both ends of the housing member,
The building duct installation according to claim 8 , wherein one end side of the guide wire is connected to the ventilation duct, and in that state, the other end side of the guide wire is pulled to house the ventilation duct in the duct housing member. Method. It is a method of installing a duct in a building when exchanging old and new ventilation ducts for circulating air inside,
At the duct installation location, a duct housing member capable of housing the ventilation duct is attached first along the duct installation path,
A new duct is connected to one end side of an existing duct that has already been installed, and in that state, the other end side of the existing duct is pulled to house the new duct in the duct housing member. Duct installation method.

Images