JP7414242B2 - Piping unit, work trolley, and construction method - Google Patents

Description

The present invention relates to a piping unit installed on each floor in a building, a work trolley used for construction thereof, and a method for constructing the piping unit.

In buildings with multiple floors, the outdoor unit for air conditioning is installed on the rooftop, and piping (vertical piping) is used to connect the outdoor unit to the air conditioners (e.g. indoor units) installed on each floor. will be installed vertically across multiple floors. Conventionally, the riser unit construction method is known as a construction method for this type of piping (for example, Patent Documents 1 and 2). The riser unit construction method involves consolidating multiple pipes that have been processed to the length of multiple floors in a factory into a unit, transporting the unitized pipes by truck to the building construction site, and then transporting the unitized pipes to the construction site. This is a construction method in which unitized piping is lifted up by a crane and then lowered and installed inside the building where the framework is being constructed.

JP2013-139828A Japanese Patent Application Publication No. 11-223009

However, the conventional construction method uses a crane installed at the construction site, which requires a large number of workers, and delays in the process due to time-consuming installation of piping, which can lead to delays in the overall construction work. There is an issue of influence.

In addition, with conventional construction methods, when a crane is used to lower piping that is as long as multiple floors and install it at a predetermined height, the crane must make delicate height adjustments, which reduces work efficiency. There is also the problem of being extremely bad. For example, the piping unit disclosed in Patent Document 1 includes a pair of attachment members that are engaged with openings formed in a building frame. The pair of attachment members have movable parts that move between a first position that does not protrude laterally than the width of the opening and a second position that protrudes laterally than the width of the opening. When lifting the piping unit with a crane and lowering it into the opening, the movable part is temporarily fixed in the first position, and when the pair of mounting members reaches a predetermined height position with respect to the opening, By releasing the temporary fixation of the movable part and moving it from the first position to the second position, the piping unit is locked to the upper part of the opening periphery. However, when the piping unit is lowered by a crane, it is necessary to make delicate height adjustments so that the pair of mounting members are at a predetermined height position with respect to the opening, resulting in poor work efficiency.

Therefore, the present invention provides a piping unit that can be installed on each floor by a smaller number of workers than before without using a crane, a work trolley used for the construction, and a piping unit that can be installed on each floor by a smaller number of workers than before. The purpose is to provide a construction method.

In order to achieve the above object, firstly, the present invention provides a piping unit that installs vertical piping across multiple floors in a building on a floor-by-floor basis, which holds a plurality of piping and a pedestal that can be installed on the floor slab by lowering the inside of an opening formed in the slab; the pedestal has a rectangular base that can be inserted into the opening formed in the floor slab of the installation target floor; a support part extending downward from the four corners of the base part, a plurality of pipes can be installed inside the base part, the base part holds the upper part of the plurality of pipes, and the support part holds the lower part of the plurality of pipes, and a flange part is provided around the base part to abut on the peripheral edge of the opening , and the base part is installed so as to close the opening, and the base part is installed to close the opening, and This structure is characterized by fire prevention treatment performed with a noncombustible material filled in the gaps between the pipes .

Secondly , in the piping unit having the first configuration, the present invention is characterized in that each of the plurality of pipings is provided with an electric cable that electrically connects the indoor unit and the outdoor unit. The configuration is as follows.

Thirdly , the present invention provides a working trolley used when installing the piping unit according to claim 1 or 2 on a floor to be installed, which can be arranged so as to sandwich the piping unit, and which has a lower surface. A truck body to which casters are attached, and a pair of lifting means arranged opposite to each other on the upper surface side of the truck body, and when the pair of lifting means lifts the piping unit, the piping unit is lifted. By moving the trolley body, the piping unit can be moved to a position above the opening formed in the floor slab of the installation target floor, and after the piping unit is moved to the position above the opening, is characterized in that the pair of lifting means lowers the piping unit inside the opening, thereby making it possible to install the piping unit in a state where the flange portion is in contact with the peripheral edge of the opening. be.

Fourthly , the present invention provides a construction method for installing the piping unit according to claim 1 or 2 , comprising: carrying the piping unit in a horizontal position to a floor to be installed; a step of changing the posture from a horizontal position to a standing position; a step of lifting the piping unit in the standing position and moving the piping unit to a position above an opening formed in a floor slab of the installation target floor; and a step of moving the piping unit to a position above an opening formed in a floor slab of the installation target floor. This configuration is characterized by comprising the step of lowering the flange portion from a position above the opening to place the flange portion in contact with the peripheral edge of the opening.

According to the present invention, it is possible to install piping units on each floor with a smaller number of workers than before without using a crane at the construction site, and piping units can be installed efficiently at low cost. can do.

FIG. 2 is a perspective view showing an example of the configuration of a piping unit. FIG. 3 is a perspective view showing the pedestal. It is a figure showing the internal structure of a base part. It is a figure showing an example of composition of piping installed in a frame. It is a figure showing the concept of the construction method of a piping unit. It is a figure which shows the example which attached the 1st installation tool and the 2nd installation tool to the piping unit. It is a figure showing an example of the work trolley used when constructing a piping unit. It is a figure which shows the example of carrying in a piping unit to the installation target floor. It is a figure showing an example of assembling a work trolley to a piping unit. It is a figure which shows the state which lifted up the piping unit. It is a figure which shows the example which changes the attitude|position of a piping unit from a horizontal attitude|position to an upright attitude|position. It is a figure which shows the example which moves a piping unit to the position above the opening of a floor slab. It is a figure which shows the example which attached the auxiliary member. It is a figure which shows the example which moved the piping unit to the position above the opening of the floor slab. It is a figure which shows the state where the 1st installation tool supports the piping unit. It is a figure which illustrates the state where the 2nd installation tool was attached to the piping unit. It is a figure which illustrates the state where the 1st installation tool was removed from the piping unit. It is a figure which illustrates the state where the piping unit was installed in the opening of the floor slab. It is a diagram showing a state in which the piping unit is installed on the floor slab on the upper floor after the piping unit is installed on the floor slab on the lower floor.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In each of the drawings referred to below, common members are given the same reference numerals, and overlapping explanations thereof will be omitted.

FIG. 1 is a perspective view showing a piping unit 1 in an embodiment of the present invention. This piping unit 1 is a unit in which a plurality of pipes (vertical pipes) arranged vertically across a plurality of floors of a building are aggregated, and a plurality of pipes can be installed on each floor. For example, the piping unit 1 can be installed one floor at a time from the lower floor to the upper floor in a newly constructed building.

This piping unit 1 includes a pedestal 2 formed by assembling a plurality of steel materials such as angle iron and channel steel into a rectangular parallelepiped shape by welding or the like, and a plurality of piping 10 attached to the pedestal 2 and held by the pedestal 2. It is equipped with The pedestal 2 is configured as an earthquake-resistant pedestal that includes a box-shaped base portion 3 provided at the top and support portions 4 extending downward from the four corners of the lower surface of the base portion 3. The plurality of pipes 10 are arranged in the longitudinal direction (vertical direction) inside the pedestal 2 at predetermined intervals, and are installed so as to penetrate the upper and lower surfaces of the base part 3 . The upper portions of the plurality of pipes 10 are fixed to the base portion 3 and the lower portions are fixed to the support portion 4.

FIG. 2 is a perspective view showing the pedestal 2. As shown in FIG. The base portion 3 has an upper plate 25 in which a plurality of holes 27 are formed on the upper surface side. The base portion 3 also has a lower plate 26 on the lower surface side in which a plurality of holes 27 are formed at the same positions as the upper plate 25. The plurality of pipes 10 are inserted into a plurality of holes 27 formed in the upper plate 25 and the lower plate 26, and are installed so as to vertically penetrate inside the base portion 3.

Further, a flange portion 21 that projects horizontally is formed on the peripheral side surface of the base portion 3. The flange portion 21 is formed to protrude further outward than the peripheral edge of the opening 110 (see FIG. 5) formed in the frame (floor slab, etc.) on the floor to be installed among the plurality of floors. Further, the flange portion 21 is integrally formed with the base portion 3 and has sufficient strength to support the entire weight of the piping unit 1.

On both left and right sides of the upper plate 25 of the base portion 3, a pair of support walls 5, 5 made of, for example, channel steel are erected at a predetermined interval. A plurality of fittings 8 are attached to the upper ends of the pair of support walls 5, 5, so as to cross the upper position of the upper plate 25 in the left-right direction. The mounting fitting 8 is a fitting for fixing the upper part of the pipe 10 to the base portion 3, and is made of, for example, an angle member having an L-shaped cross section. Each of the plurality of mounting fittings 8 is formed with a plurality of holes 8a for attaching a U-shaped piping band 9 (see FIG. 1). The upper part of the piping 10 protruding upward from the hole 27 of the upper plate 25 is restrained by the piping band 9, and both ends of the piping band 9 are fixed to the hole 8a with bolts and nuts, so that the upper part of the piping 10 is attached to the base part 3. Fixed.

The support portion 4 has a plurality of pillars 6 extending downward from the four corners of the lower surface of the base portion 3 . The plurality of struts 6 include, for example, struts 6a and 6b arranged on both left and right front sides of the pedestal 2, and struts 6b and 6c arranged on both left and right rear sides of the pedestal 2. Further, the support portion 4 has connecting portions 7, 7 extending in the front-rear direction at lower portions on both left and right sides of the pedestal 2. These connecting parts 7, 7 mutually connect the lower ends of columns 6a, 6c arranged at two places on the front and back on the left side of the pedestal 2, and connect the lower ends of columns 6b, 6d arranged at two places on the front and rear on the right side of the pedestal 2. interconnect. In other words, the connecting parts 7, 7 are arranged parallel to each other at the lower end of the supporting part 4. A plurality of mounting fittings 8 are attached to the upper surface side of the connecting parts 7, 7 so as to cross the lower position of the base part 3 in the left-right direction. These plurality of fittings 8 are similar to the above-mentioned fittings 8 attached to the base portion 3, and are fittings for fixing the lower part of the pipe 10 to the support portion 4. That is, a plurality of holes 8a for attaching U-shaped piping bands 9 (see FIG. 1) are formed in each of the plurality of mounting fittings 8 that cross between the pair of connecting portions 7, 7. The lower part of the piping 10 extending downward from the base part 3 is restrained by the piping band 9, and both ends of the piping band 9 are fixed to the holes 8a with bolts and nuts, thereby fixing the lower part of the piping 10 to the support part 4. .

Further, the support section 4 is provided with a mounting section 22 at a predetermined height position of the support column 6 for mounting a first application tool 30, which will be described later. For example, the attachment portion 22 is formed as a hole into which a fastening member consisting of a bolt and a nut can be attached.

Further, the pair of support walls 5 provided on the base portion 3 are provided with mounting portions 23 at both end positions in the front-rear direction for mounting a second application tool 40, which will be described later. For example, the attachment portion 23 is formed as a hole into which a fastening member consisting of a bolt and a nut can be attached.

FIG. 3 is a diagram showing the internal structure of the base portion 3 with the piping 10 attached to the pedestal 2. As shown in FIG. As shown in FIG. 3, the piping 10 is installed so as to penetrate the base portion 3 in the vertical direction. Furthermore, inside the base portion 3, the gaps between the plurality of pipes 10 are filled with a noncombustible material 29. The noncombustible material 29 is used as a refrigerant coating copper pipe penetration treatment material, and includes, for example, a thermal expansion fireproof material, and has the property of thermally expanding due to high temperatures during a fire and completely concealing the inside of the base portion 3. have. This noncombustible material 29 closes the holes 27 in the upper plate 25 and lower plate 26. In this way, the base part 3 is subjected to fire prevention treatment by the non-combustible material 29 filled inside the base part 3. Therefore, the base portion 3 has a fireproof structure.

FIG. 4 is a diagram showing a configuration example of the piping 10 installed on the pedestal 2. As shown in FIG. For example, the pipe 10 is formed by bundling together three refrigerant pipes 11, 12, and 13 for air conditioning. The refrigerant pipes 11, 12, and 13 are pipes for circulating refrigerant between an outdoor unit installed on the roof of a building and an air conditioner (for example, an indoor unit) installed on each floor. Therefore, the pipe 10 formed by bundling the refrigerant pipes 11, 12, and 13 into one is a pipe connected to an air conditioner installed on any floor of the building. In other words, the three pipes 11, 12, 13 included in one pipe 10 are connected to an air conditioner on the same floor. The refrigerant pipes 11, 12, and 13 are all copper pipes, and the outer peripheral surfaces thereof are covered with a cylindrical heat insulating material 14. Each of the refrigerant pipes 11, 12, 13 is formed in advance to have a length equal to or shorter than, for example, the length from the floor to the ceiling of the floor to be installed, and is bundled together with an adhesive tape 18 or the like. Note that although the illustrated example shows a case where three refrigerant pipes 11, 12, and 13 are bundled into one, the number of refrigerant pipes to be bundled into one is not limited to three.

Further, an electric cable 16 is attached to the piping 10. Specifically, the pipe 10 has a structure in which a sleeve 15 through which an electric cable 16 can be inserted is bundled together with refrigerant pipes 11, 12, and 13. An electrical cable 16 is inserted into the sleeve 15 for transmitting and receiving electrical signals between an outdoor unit installed on the roof of the building and an air conditioner (for example, an indoor unit) installed on each floor. attached to 10. As shown in the enlarged view A of FIG. 4, the upper end of the electric cable 16 extends upward from the upper end opening of the sleeve 15, and a connector 17a is attached to the tip thereof. Further, as shown in the enlarged view B of FIG. 4, the lower end of the electric cable 16 extends downward from the lower end opening of the sleeve 15. If the electric cable 16 is longer than the sleeve 15, it is preferable to hold the electric cable 16 in a wound state using a binding band or the like. A connector 17b is attached to the lower end of the electric cable 16.

On the pedestal 2, a plurality of pipes 10 having the above configuration are arranged in parallel in the left-right direction and the front-back direction. The plurality of pipes 10 are connected to air conditioners on different floors, respectively. Therefore, the pedestal 2 can hold a plurality of pipes 10 arranged on each of a plurality of floors.

The piping unit 1 as described above is assembled in a factory in the state shown in FIG. 1, transported to a construction site, and transported to a floor to be installed using a temporary elevator installed at the construction site. That is, the piping unit 1 can be transported to the installation target floor without using a crane installed during construction work. When the piping unit 1 is transported to the installation target floor, it is installed at the installation location.

FIG. 5 is a diagram showing the concept of the construction method of the piping unit 1. As shown in FIG. 5, openings 110 for passing vertical piping 10 are formed in the floor slab 100 of each floor of a building under construction. The piping unit 1 is installed on the floor slab 100 of the installation target floor by lowering it inside the opening 110. As described above, the flange portion 21 provided on the base portion 3 of the pedestal 2 is formed to protrude further outward than the peripheral edge of the opening 110. Therefore, when the piping unit 1 is lowered from above the opening 110 toward the inside of the opening 110, the flange portion 21 comes into contact with the peripheral edge of the opening 110, and the piping unit 1 is moved with the base portion 3 fitted into the opening 110. The unit 1 can be installed on a floor slab 100. Therefore, when lowering the piping unit 1 toward the opening 110, it is only necessary to lower the piping unit 1 until the flange portion 21 comes into contact with the floor slab 100, so there is no need to make delicate height adjustments of the piping unit 1. Work efficiency can be improved.

The method of lowering the piping unit 1 toward the opening 110 on the installation target floor is not particularly limited, and any method may be used. However, in the example shown in FIG. 5, the lower end of the pipe 10 extends further downward than the lower end of the support column 6. The refrigerant pipes 11, 12, and 13 included in the pipe 10 are fragile and easily damaged. Therefore, if the lower end of the piping 10 extends further downward than the lower end of the support column 6 as shown in FIG. It is necessary to install it on the target floor.

Therefore, in the following, an example of a construction method that can be suitably used when the lower end of the pipe 10 extends further downward than the lower end of the support 6 will be described.

FIG. 6 is a diagram showing an example in which the first installation tool 30 and the second installation tool 40 are attached to the piping unit 1. The first application tool 30 is attached to two locations on the front side and the rear side of the support portion 4 of the pedestal 2. Further, the second application tool 40 is attached to two locations on the upper surface of the base portion 3, one on the front side and the other on the rear side.

The first application tool 30 includes a connecting member 31 arranged horizontally between a pair of columns 6, 6 arranged in the left-right direction, and legs 32, 32 fixed to both ends of the connecting member 31. However, it can be attached to and detached from the front side and the rear side of the pedestal 2, respectively. Attachment fittings 33, 33 are provided on the upper surface side of both ends of the connecting member 31. The mounting fittings 33, 33 are attached to the mounting parts 22, 22 provided at predetermined height positions of the columns 6, 6 by fastening members made of bolts and nuts. The legs 32, 32 are arranged along the front or rear surface of the support column 6, and the lower ends of the legs 32, 32 are attached to the attachment parts 22, 22 of the support columns 6, 6. It is installed at approximately the center height position of the support part 4. The first application tool 30 has a shaft portion 35 that projects outward at the center of the horizontally arranged connecting member 31 . For example, the shaft portion 35 is constituted by a bolt having a head, and the head of the bolt is provided at a predetermined distance from the surface of the connecting member 31 so that the shaft portion 35 is exposed between the head and the connecting member 31. It is formed by the shaft of the bolt.

The second application tool 40 includes a connecting member 41 disposed above the base portion 3 in the left-right direction, and leg portions 42, 42 fixed to both ends of the connecting member 41. In this second application tool 40, the lower ends of the leg parts 42, 42 are attached to the attachment part 23 provided on the support wall 5 of the base part 3 by a fastening member consisting of a bolt and a nut. Such a second application tool 40 has a shaft portion 45 projecting outward at the center of the connecting member 41 arranged in the horizontal direction. For example, the shaft portion 45 is constituted by a bolt having a head, and the head of the bolt is provided at a predetermined distance from the surface of the connecting member 41, so that the shaft portion 45 is exposed between the head and the connecting member 41. It is formed by the shaft of the bolt.

When the piping unit 1 is installed on the installation target floor, the first installation tool 30 and the second installation tool 40 are attached as shown in FIG. However, as will be described later, during construction of the piping unit 1, the first installation tool 30 is used in an earlier step, and the second installation tool 40 is used in a later step. Therefore, only the first application tool 30 may be attached to the piping unit 1 to perform the first step, and the second application tool 40 may be attached to the piping unit 1 when moving to the subsequent step.

Next, FIG. 7 is a diagram showing an example of a working trolley 50 used when constructing the piping unit 1. This work trolley 50 can be arranged so as to sandwich the frame 2 of the piping unit 1, and is arranged opposite to a trolley body 51 having casters 55 attached to the lower surface thereof and the upper surface side of the trolley body 51. A pair of lifting means 52, 52 are provided.

The trolley body 51 includes a pair of beams 53, 53 that are arranged to face each other at an interval wider than the width of the frame 2 of the piping unit 1 in the front-rear direction, and mutually connects both ends of the pair of beams 53, 53. A pair of connecting beams 54, 54 are provided. Casters 55 are attached to the lower surfaces of both ends of the pair of beams 53, 53. The casters 55 are equipped with wheels that can rotate around a vertical axis, and support the work trolley 50 so as to be movable in any direction.

The connecting beams 54, 54 are attached to connect the opposite ends of the pair of beams 53, 53 using a fastening member 56 made of, for example, a bolt and a nut. When the two connecting beams 54, 54 are attached to both ends of the pair of beams 53, 53, the truck main body 51 becomes a frame frame having a rectangular shape in plan view. Moreover, since the fastening member 56 is removable, at least one of the two connecting beams 54, 54 can be removed from the truck body 51. When one of the two connecting beams 54, 54 is removed from the truck body 51, the truck body 51 becomes a U-shaped frame in plan view.

The truck main body 51 is provided with lifting means 52, 52 erected at the center of the upper surface of a pair of beams 53, 53, respectively. The lifting means 52, 52 are constituted by, for example, a manual lifting device. The lifting means 52, 52 have a casing 57 having a predetermined height, and a lifting mechanism for supporting the pedestal 2 and raising and lowering it is mounted on the casing 57. The lifting means 52, 52 are provided with an opening opening in the vertical direction on the front side of a housing 57 arranged to face each other, and an operating handle 58 is provided on the back side of the housing 57. . The operating handle 58 operates a winder 65 provided inside the housing 57. The end of a cable 64 such as a chain or wire rope is connected to the winder 65. Therefore, when the operation handle 58 is rotated in a predetermined direction about the rotation axis L1, the winder 65 rotates the internal winding drum together with the operation handle 58, and winds up or unwinds the cable 64. do. For example, the operating handle 58 is provided with a switchable one-way clutch, and has a structure that prevents the operating handle 58 from rotating in the opposite direction even if the operating handle 58 is released during a winding operation or a feeding operation. The cable 64 extending from the winder 65 is hung on a pulley 63 attached to the upper part of the inside of the housing 57, and has its tip movable in the vertical direction along the opening on the front side of the housing 57. A support member 61 is attached. The support member 61 is a member that supports the pedestal 2. As shown in enlarged view C of FIG. 7, the support member 61 is made of, for example, a metal plate having a predetermined length in the horizontal direction, and has a U-shaped notch extending upward in the center of the longitudinal direction. It has a section 62. This locking portion 62 pivotally supports each of the shaft portions 35 and 45 by receiving and locking each of the shaft portion 35 of the first application tool 30 and the shaft portion 45 of the second application tool 40.

Next, a procedure for installing the piping unit 1 on the installation target floor using the above-mentioned work cart 50 will be explained. First, the piping unit 1 is assembled at a factory, and then the first installation tool 30 is attached to both the front and rear surfaces of the pedestal 2. Then, as shown in FIG. 8, casters 19 are attached to the side surfaces of the pedestal 2, and the pedestal 2 is turned sideways, and the casters 39 are grounded. The piping unit 1 is loaded onto a truck in the horizontal position shown in FIG. 8 and transported from a factory to a construction site. When arriving at the construction site, the piping unit 1 is unloaded from the truck while lying on its side, and transported to the installation target floor using a temporary elevator at the construction site. In other words, the piping unit 1 of this embodiment can be transported to the installation target floor without using a crane at the construction site. Therefore, the piping unit 1 can be transported to the installation target floor with fewer people than when using a crane. Although FIG. 8 shows an example in which casters 39 are attached to the side surface of the pedestal 2, the present invention is not limited to this. For example, the pedestal 2 may be placed on its side and loaded on a truck other than the work truck 50, and then transported from the factory to the installation target floor.

When the piping unit 1 is carried to the installation target floor, a working trolley 50 is prepared as shown in FIG. At this time, one connecting beam 54 of the work truck 50 is removed from the truck body 51. Then, the frame 2 is inserted between the pair of beams 53, 53, and the connecting beam 54 that has been removed from the truck body 51 is attached to the truck body 51. As a result, as shown in FIG. 9, the piping unit 1 is placed between the pair of lifting means 52, 52 provided on the working trolley 50. Thereafter, the operating handle 58 is rotated in a predetermined direction to align the support member 61 of the lifting means 52, 52 to the height position of the shaft portion 35 provided on the first application tool 30, and the locking portion 62 of the support member 61 is to lock the shaft portion 35.

Subsequently, the operating handles 58 of the lifting means 52, 52 are simultaneously rotated in a predetermined direction to wind up the cable 74. As a result, the support member 61 rises, and as shown in FIG. 10, the piping unit 1 is lifted by the lifting means 52, 52 of the working trolley 50.

When the piping unit 1 is lifted to a predetermined height, the piping unit 1 is then rotated in the R direction as shown in FIG. 11, and the piping unit 1 changes its posture from the horizontal position to the standing position. That is, since the U-shaped locking portion 62 provided on the support member 61 rotatably supports the shaft portion 35 of the first application tool 30, the piping unit 1 can be rotated around the shaft portion 35. By rotating, the piping unit 1 can be changed from a horizontal position to an upright position. When the casters 39 are attached to the side surface of the piping unit 1, the casters 39 can be easily removed from the piping unit 1 after the piping unit 1 is placed in an upright position.

Thereafter, the working trolley 50 moves the piping unit 1 to the installation location on the installation target floor as shown by arrow F2 in FIG. 12 while lifting the piping unit 1 in the upright position. As shown in FIG. 12, an opening 110 is formed in the floor slab 100 at the installation location of the piping unit 1 on the installation target floor. The work trolley 50 moves the piping unit 1 to a position above the opening 110 formed in the floor slab 100.

Furthermore, when moving the work cart 50 with the piping unit 1 lifted, an auxiliary member 70 as shown in FIG. 13 may be attached to prevent the piping unit 1 from swinging around the shaft portion 35. You can also do it. The auxiliary member 70 shown in FIG. 13 is a metal fitting having a roughly U-shape, and is attached to both left and right side surfaces of the support portion 4 of the pedestal 2. As shown in FIG. The auxiliary member 70 includes a pedestal connection fitting 71 extending in the front-rear direction on the side surface of the pedestal 2, and leg portions 72, 72 extending downward at both ends of the pedestal connection fitting 71 in the front-rear direction. The gantry connection fitting 71 is fixed to the lower end of the support portion 4 by a fastening member consisting of a bolt and a nut. The lower ends of the legs 72, 72 are fixed to the pair of beams 53, 53 by fastening members made of bolts and nuts. By attaching such auxiliary members 70 to both left and right side surfaces of the pedestal 2, the lower part of the piping unit 1 is fixed to the work trolley 50. Therefore, when the work trolley 50 moves with the piping unit 1 lifted up, the piping unit 1 can be prevented from swinging around the shaft portion 35, and the piping unit 1 can be moved safely. . This auxiliary member 70 is removed from the piping unit 1 and the pedestal 2 when the piping unit 1 moves to a position above the opening 110. Note that when moving the working trolley 50 with the piping unit 1 lifted, it is optional whether or not to attach the auxiliary member 70 shown in FIG. 13.

As shown in FIG. 14, when the piping unit 1 is moved to a position above the opening 110 of the floor slab 100, the operating handles 58 of the lifting means 52, 52 provided on the work trolley 50 are rotated in a predetermined direction. The piping unit 1 is lowered. Accordingly, the pedestal 2 moves the support part 4 into the opening 110 while holding the plurality of pipes 10, and descends toward the lower floor. The legs 32, 32 of the first application tool 30 attached to the front and rear sides of the pedestal 2 protrude outward from the peripheral edge of the opening 110. Therefore, when the piping unit 1 is lowered toward the opening 110, as shown in FIG. Unit 1 stops descending. At this time, the piping unit 1 is held at a predetermined height position by the first application tool 30.

As shown in FIG. 15, when the piping unit 1 is supported by the first tool 30, as shown in FIG. Attach 40. However, the second application tool 40 may be attached to the base portion 3 in the previous steps. For example, the second application tool 40 may be attached to the base portion 3 in advance at a factory.

Then, while the piping unit 1 is supported by the first tool 30, the support member 61 of the lifting means 52, 52 is removed from the shaft portion 35 of the first tool 30, and the height position of the support member 61 is moved to the second height position. The shaft portion 45 is locked to the locking portion 62 of the support member 61 in alignment with the shaft portion 45 provided on the application tool 40 .

Thereafter, by rotating the operating handles 58 of the lifting means 52, 52 in a predetermined direction, the piping unit 1 is lifted up via the second tool 40. As a result, the legs 32, 32 of the first application tool 30 are in a floating state from the floor slab 100 around the opening 110. When the legs 32, 32 of the first application tool 30 are lifted off the floor slab 100, the first application tool 30 is removed from the piping unit 1, as shown in FIG. Thereby, the piping unit 1 becomes in a state where it can be further lowered with respect to the opening 110.

After removing the first application tool 30, the operating handles 58 of the lifting means 52, 52 are rotated in a predetermined direction, and the piping unit 1 is lowered relative to the opening 110. Accordingly, the pedestal 2 moves the support part 4 deeply into the opening 110 while holding the plurality of pipes 10, and the lower part of the base part 3 fits into the opening 110. When the flange portion 21 provided on the base portion 3 comes into contact with the periphery of the opening 110, the descent of the piping unit 1 is stopped. That is, when the flange portion 21 comes into contact with the periphery of the opening 110 and the piping unit 1 cannot be lowered, it means that the piping unit 1 has been properly positioned. At this time, there is no need to make delicate height adjustments of the piping unit 1.

Thereafter, the support member 61 is removed from the shaft portion 45 of the second application tool 40, and the work cart 50 is removed. Further, the second application tool 40 attached to the base portion 3 of the piping unit 1 is also removed from the piping unit 1. Then, by fixing the flange portion 21 to the floor slab 100 using anchor bolts or the like, the installation of the piping unit 1 is completed. By fixing the flange portion 21 to the floor slab 100 with anchor bolts or the like, the frame 2 of the piping unit 1 becomes an integrated structure with the building frame.

FIG. 18 is a diagram showing a state in which the piping unit 1 is installed on the floor slab 100 of the installation target floor. As described above, the piping unit 1 is installed by being lowered from the opening 110 formed in the floor slab 100 on the upper floor, so that the support part 4 is installed in a state protruding into the ceiling space on the lower floor. The support portion 4 has approximately the same length as the piping 10 supported by the pedestal 2, and holds the lower portion of the piping 10. Therefore, the piping 10 provided in the piping unit 1 is installed with the upper and lower parts fixed to the frame by the frame 2. Therefore, the pedestal 2 can suppress the vibration of the piping 10 when an earthquake occurs, and can prevent the fragile piping 10 from being damaged.

Further, when the piping unit 1 is installed as shown in FIG. 18, the base portion 3 is fitted into the opening 110 of the floor slab 100, and the opening 110 of the floor slab 100 is closed by the base portion 3. In addition, the inside of the base portion 3 is subjected to fire prevention treatment. Therefore, when the piping unit 1 is installed in the opening 110, it is possible to realize a fireproof division between the upper floor and the lower floor, and it is also possible to prevent a chimney formation phenomenon in the event of a fire. In other words, the piping unit 1 of this embodiment can realize a fireproof division by simply lowering and installing the piping unit 1 with respect to the opening 110 of the floor slab 100 on the upper floor, and can also block the opening 110 and prevent the phenomenon of forming a chimney. Therefore, it has excellent work efficiency.

Further, in the piping unit 1, an electric cable 16 is attached to each of the plurality of piping 10 held on the pedestal 2 to electrically connect the indoor unit and the outdoor unit. Therefore, there is no need to separately perform the work of wiring the electric cable 16 after installing the piping unit 1 in the opening 110 of the floor slab 100. Therefore, work efficiency can also be improved in that the work of wiring the electric cable 16 between the upper floor and the lower floor can be omitted.

FIG. 19 is a diagram showing a state in which the piping unit 1 is installed on the floor slab 100b on the lower floor, and then the piping unit 1 is installed on the floor slab 100a on the upper floor. For example, when the piping unit 1 is installed on the floor slab 100b of the lower floor, the upper end of the piping 10 held in the piping unit 1 is located at a height h1 from the floor slab 100b. Here, the height h1 is, for example, about 500 to 1000 mm. However, depending on the floor on which the piping unit 1 is installed, the height h1 may exceed 1000 mm. On the other hand, the piping unit 1 installed on the floor slab 100a on the upper floor holds piping 10 with a length shorter than the floor height H on the lower floor, and when installed on the floor slab 100a on the upper floor, , a gap h2 is created between the lower end of the pipe 10 and the upper end of the pipe 10 installed on the lower floor. This gap h2 is, for example, about 500 to 1000 mm. However, depending on the floor on which the piping unit 1 is installed, the height h2 may exceed 1000 mm. After the piping unit 1 is installed on the floor slab 100a on the upper floor, a short pipe (refrigerant piping) corresponding to the length of the gap h2 is inserted into the gap h2, and the upper piping is connected using a joint such as a mechanical joint. 10 and the lower piping 10 are interconnected. Thereby, the pipes 10 held by the plurality of pipe units 1 installed on each floor are interconnected.

Also, regarding the electric cable 16, the connector 17a of the electric cable 16 is held in the piping unit 1 installed on the floor slab 100b on the lower floor, and the connector 17a of the electric cable 16 is held on the piping unit 1 installed on the floor slab 100a on the upper floor. Connect the connector 17b of the electric cable 16 that is connected to the connector 17b. Thereby, the electric cables 16 held by the plurality of piping units 1 installed on each floor can be interconnected and electrically connected.

Further, the working trolley 50 used when installing the piping unit 1 is equipped with a pair of lifting means 52, 52 arranged so as to face each other on the upper surface side of the trolley main body 51. By moving the trolley body 51 with the means 52, 52 lifting the piping unit 1, it is possible to move the piping unit 1 to a position above the opening 110 formed in the floor slab 100 of the floor to be installed. After the piping unit 1 has been moved to a position above the opening 110, the pair of lifting means 52, 52 lowers the piping unit 1 inside the opening 110, thereby placing the flange portion 21 on the periphery of the opening 110. It is possible to install them in a state where they are in contact with each other. If such a work trolley 50 is used, it is possible to install the piping unit 1 by a small number of people without using a crane at the construction site, and there is an advantage that construction can be carried out efficiently at low cost.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to what has been described in the above embodiments. That is, the present invention includes various modifications of the embodiments described above.

For example, in the above-mentioned embodiment, the lifting device 52, 52 is a manual lifting device. However, the lifting means 52, 52 are not limited to manual types.

Furthermore, in the above embodiment, an example has been described in which the first installation tool 30 and the second installation tool 40 are attached to the piping unit 1 when the piping unit 1 is installed using the work trolley 50. However, if the height of the pair of lifting means 52, 52 is sufficient, it is not necessary to attach the first application tool 30, and the support member 61 of the lifting means 52, 52 is attached to the second application tool 40. The piping unit 1 may be lifted by supporting the shaft portion 45 of the piping unit 1. Further, the second application tool 40 may be integrally formed with the base portion 3 of the pedestal 2. In this case, there is no need to attach the second application tool 40 to the piping unit 1 or remove the piping unit 1, so that the work efficiency can be further improved.

Moreover, in the embodiment described above, the lower ends of the plurality of pipes 10 provided in the piping unit 1 are exemplified to extend further below the lower end of the support section 4 . However, the lower ends of the plurality of pipes 10 may be arranged above the lower end of the support section 4. In this case, when the piping unit 1 is changed to the upright position, the piping unit 1 can be temporarily placed on the floor slab 100 with the lower end of the support portion 4 grounded. Therefore, work efficiency can be further improved in that there is no need to attach the first application tool 30 described above.

Further, in the above embodiment, an example has been described in which the flange portion 21 protrudes from the peripheral side surface of the base portion 3 in the horizontal direction. However, the flange portion 21 is not limited to one that protrudes horizontally from the central height position of the side surface of the base portion 3. For example, the flange portion 21 may be formed flush with the upper surface of the base portion 3, or may be formed flush with the lower surface of the base portion 3. In addition, when the flange part 21 is formed flush with the lower surface of the base part 3, even if the piping unit 1 is installed in the opening 110, the base part 3 will not fit into the inside of the opening 110. However, since the base portion 3 is similar to the above embodiment in that it can close the opening 110, there is no problem.

Furthermore, in the above embodiment, an example in which the piping unit 1 is constructed using the work trolley 50 has been described. However, when constructing the piping unit 1, a method different from the method using the work trolley 50 described above may be used.

DESCRIPTION OF SYMBOLS 1... Piping unit, 2... Frame, 3... Base part, 4... Support part, 10... Piping, 16... Electric cable, 50... Work trolley, 51... Dolly body, 52... Lifting means, 100, 100a, 100b ...Floor slab (framework), 110...opening.

Claims (4)

A piping unit that installs vertical piping for each floor across multiple floors in a building,
A frame that holds a plurality of pipes and can be installed on the floor slab by lowering the inside of an opening formed in the floor slab of the installation target floor,
The pedestal is
A base part that can be inserted into an opening formed in a floor slab of the floor to be installed;
a support portion extending downward from the base portion;
Equipped with
A plurality of pipes can be installed inside the base part, the base part holds the upper part of the plurality of pipes, and the support part holds the lower part of the plurality of pipes,
A flange portion is provided around the base portion to abut a peripheral edge of the opening,
The piping unit is characterized in that the base portion is installed so as to close the opening, and is fireproofed with a noncombustible material filled in gaps between the plurality of pipings . The piping unit according to claim 1 , wherein each of the plurality of piping is attached with an electric cable that electrically connects the indoor unit and the outdoor unit. A working trolley used when installing the piping unit according to claim 1 or 2 on an installation target floor,
a trolley body that can be arranged to sandwich the piping unit and that has casters attached to its lower surface;
a pair of lifting means arranged opposite to each other on the upper surface side of the truck body;
Equipped with
By moving the trolley body with the pair of lifting means lifting the piping unit, it is possible to move the piping unit to a position above an opening formed in a floor slab of the installation target floor. At the same time, after the piping unit is moved to a position above the opening, the pair of lifting means lowers the piping unit inside the opening, so that the flange portion is brought into contact with the peripheral edge of the opening. A work trolley characterized by being able to be installed in a state where they are in contact with each other. A construction method for installing the piping unit according to claim 1 or 2 , comprising:
a step of transporting the piping unit to the installation target floor in a horizontal position;
changing the posture of the piping unit from the horizontal position to a standing position;
Lifting the piping unit in the upright position and moving the piping unit to a position above an opening formed in a floor slab of the installation target floor;
lowering the piping unit from a position above the opening to place the flange portion in contact with the peripheral edge of the opening;
A construction method characterized by having.

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