JPH0156310B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a duct construction method for constructing vertical air conditioning ducts for high-rise buildings with good construction efficiency.

Conventionally, when installing vertical air conditioning ducts in a building, the method was to connect ducts that were lower than the ceiling height of each floor and were brought into the duct installation shaft after the building was erected. was taken. Therefore, coordination with other building finishing processes is necessary, which makes it complicated, and requires a large number of man-hours.
Additionally, the large number of seams caused problems with air leakage. In particular, such problems become apparent when constructing medium-to-high-rise buildings and skyscrapers, and the amount of ductwork required is extremely large when performing all-air type "VAV air conditioning," so it is difficult to continue with the conventional method. There are many problems in implementing this.

The present invention provides a duct construction method for constructing vertical air-conditioning ducts in high-rise buildings with extremely high construction efficiency. The air supply vertical duct unit, which consists of a spiral duct, is lifted vertically by a tower crane at the same time as the steel frame is being erected to the upper floor, and the upper end of the existing lower floor vertical duct unit and this lifted This is a vertical duct construction method in which the lower end of the vertical duct unit is connected to the lower end of the vertical duct unit via a reducer with the tapered part facing upward, and the upper part of the vertical duct unit on the upper floor is temporarily supported on the construction material. The invention is characterized in that the lifted upper floor vertical duct unit is positioned at a predetermined fixed position by moving the overlapping amount of the lower end or upper end of the reducer and the duct in the vertical direction.

To explain specifically according to the embodiment shown in the drawings, FIG.
Section 1 shows the state of lifting. In other words, node n-2 is the node where the outer wall 3 etc. have also been completed, and
At the same time as the erection of the steel frame for section -1, after concrete pouring for section n-1 was completed and a curing period of several days had passed, the vertical duct of section n-1 was constructed before the steel frame for section n was erected. A state in which the unit 1 is connected to the existing vertical duct 1a at node n-2 is shown. FIG. 2 is an enlarged view of the vertical duct unit 1 connected to the existing vertical duct unit 1a, and is an enlarged view of the vertical duct unit 1a.
Existing vertical duct 1a fixed vertically with fixing fittings 5 with the top floor 4i of section 2 as a fixed floor
On the other hand, the vertical duct unit 1 is shown in a state immediately before being connected via the reducer 7, with the vertical duct unit 1 temporarily fixed by the hanging fittings 6 with the top floor 4m of the n-1 node as the fixed floor. FIG. 3 is an enlarged view of the reducer 7 in the state shown in FIG.
It shows a state in which it is temporarily fixed to the upper end of a with screws 9.

Lower end of vertical duct unit 1 and existing vertical duct 1a
The connection with the upper end is performed by moving the reducer 7 temporarily fixed to the existing vertical duct 1a upward, with each duct fixed by the fixed floors 4i and 4m as shown in Fig. 2. . That is, from the state shown in Fig. 3, remove screw 9,
Lift the reducer 7 upward with the reducer lifting fitting 10, insert the upper edge 11 of the reducer 7 into the lower opening of the vertical duct unit 1 as shown in FIG. At the same time as it is fixed to the duct unit 1, the lower edge 13 of this reducer 7 is also slid by that amount and fixed again to the upper end of the existing vertical duct unit 1a with screws 9. In addition, Figures 5 and 6
As shown in the figure, the reducer 7 is attached to the lower part of the vertical duct unit 1.
Slide the upper edge 11 of the existing vertical duct 1a
Connect the lower end and the lower edge 13 of the reducer 7 with the screw 9.
It can also be fixed by

The vertical duct unit used in this construction method allows the use of factory-produced spiral ducts.
In other words, a spiral duct in which a galvanized steel plate is spirally wound to form a cylinder can be suitably used, and it is easier to work with than the conventional method of on-site construction.
Many advantages can be enjoyed in terms of manufacturing cost, accuracy, durability, etc. If the spiral duct unit is provided with attachment ports 14 (FIG. 2) for horizontal ducts to each floor at predetermined positions during factory production, the work efficiency will be further improved. The diameter of each vertical duct unit becomes shorter as it goes to the higher floors, and for each lift, a reducer that engages with the diameter of the next lifted duct unit is attached to its upper end, and a curing lid is attached. It is convenient for actual work to cover the material and lift it.

In this way, when using the construction method of the present invention, the conventional common sense idea that air conditioning duct construction should be carried out after erection is completed, and the duct can be easily lifted at the same time as steel frame erection progresses. The construction can be carried out accurately and safely, and the number of man-hours required can be greatly reduced, and air leakage can also be greatly reduced due to the reduction in joints.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the duct lifting state using the method of the present invention, Figure 2 is a diagram showing the duct being temporarily placed, and Figure 3 is a diagram showing the duct being temporarily placed.
The figure is an enlarged view of the reducer part in Figure 2, Figure 4 is an enlarged view similar to Figure 3 showing the connected state of the reducer part, and Figures 5 and 6 are Figures 3 and 6 showing different aspects. This is an enlarged view similar to Figure 4. 1...Vertical duct unit, 2...Tower crane, 4...Fixed floor, 5...Fixed hardware, 7...Reducer.

Claims (1)

[Claims] 1. When installing a vertical air conditioning duct in a high-rise building, an air supply vertical duct unit consisting of a spiral duct with a length for multiple floors and with installation ports for horizontal ducts on each floor is installed. Simultaneously with the progress of the steel frame erection on the upper floors, a tower crane was used to lift the steel frame vertically and connect the upper end of the existing lower floor vertical duct unit with the lower end of this lifted vertical duct unit to form a tapered section. This is a vertical duct construction method in which the upper part of the lifted upper floor vertical duct unit is temporarily supported on the construction material, and the lower end or upper end of the said registerer is overlapped with the duct. A method for constructing vertical air conditioning ducts for high-rise buildings, characterized by positioning a lifted upper floor vertical duct unit at a predetermined fixed position by moving the vertical duct unit vertically.