2020.01.06

R&D WORKS Vol. 10

Louver free-fitting system

Wavy ceiling louvers.

R&D WORKS TOP

This is a louver fixing system that creates curved surfaces by changing the installation angle of each louver one by one. When considering a method for fixing louvers, the principle is to increase ease of installation due to the large number of pieces to be installed, in other words, to standardize and standardize. For this reason, louvers have always been installed in straight lines and flat surfaces. This is a fixing system that goes beyond these constraints and allows for the creation of freely curved surfaces. Although there were simple methods for indoor displays, this time it is for outdoor use, and its characteristic is that it is strong enough to withstand strong winds.

KI T T E  H A K ATA first floor piloti and passageway.
The cantilevered structure creates a pillar-free space, with undulating ceiling louvers installed.

Louvers add movement to architecture

Architecture has many repetitive elements such as tiled walls and latticed fittings, but one of these is perhaps the louver, which is particularly characteristic of modern architecture. Louvers, which constitute a design element as a transparent "surface," are usually installed in a straight line, in a flat manner. One reason for this is that they have no choice but to adopt a standardized, uniform installation method in order to improve workability. However, the nature of louvers is that if you make small changes to this sequence, a wave-like movement will be created. Here, a large undulation was created by gradually changing the installation angle of the louvers that make up the ceiling surface in both the cross-sectional and flat directions.

The ceiling of the passageway on the first floor of KI T T E  H A K ATA.
The installation angles of the louvers change in both the cross-sectional and planar directions.

A complex form born from a simple structure

First, the vertical change was achieved by curving two base pipes separately. The louvers are connected to these base pipes, and their positioning must be accurate to the millimeter. This is because even the slightest misalignment is noticeable in continuous molding. This highly accurate positioning is made possible by the cylindrical joint material. When two cylinders are stacked, the geometric property of maintaining a constant center distance is utilized. When the cylindrical joint material is in contact with the base pipe, the distance is accurately maintained. The louver material is attached to the cylindrical joint material, and the end of the cylindrical joint material is bolted to the base pipe with a U-shaped bracket to secure it. The U-shaped bracket is made wide, and the bolt joint hole is made long and slit-like to allow for play, making it possible to freely change the horizontal angle within a certain range. This is a high-precision, low-cost fixing system.

Details of the louver adjustable fixing system.

Joint development: Mitsubishi Jisho Design Inc., Ltd., Takenaka Corporation, Kondo Metal Industries Co., Ltd.

Louver free-fitting system
[Patent registration] Registration number: Patent No. 6900001


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