JPS6321511U

JPS6321511U -

Info

Publication number: JPS6321511U
Application number: JP11436186U
Authority: JP
Priority date: 1986-07-25
Filing date: 1986-07-25
Publication date: 1988-02-12

Description

[Brief explanation of the drawing]

図面中第１図乃至第６図はこの考案の実施例を
示すもので、第１図は使用状態での側面図、第２
図は斜視図、第３図は断面図、第４図は設置孔の
開口形成時での側面図、第５図は別の実施例にお
ける分解斜視図、第６図は設置孔に器具類を取付
けた状態での側面図であり、第７図は従来におけ
る設置孔に器具類を取付けた状態での側面図であ
る。Ｃ…天井化粧ボード、Ｈ…設置孔、Ｔ…器具類
、Ｆ…取付フランジ、Ｄ…電気ドリル、１…シヤ
ンク、２…センター、３…支持部、４…ホールソ
ー筒、５…鋸歯、６…研削面、７…ホールソー体
、８…連結手段、９…貫挿孔、１０…連結ネジ、
１１…ネジ孔。 Figures 1 to 6 in the drawings show an embodiment of this invention, with Figure 1 being a side view in use, and Figure 2 being a side view of the device in use.
The figure is a perspective view, FIG. 3 is a sectional view, FIG. 4 is a side view when the opening of the installation hole is formed, FIG. 5 is an exploded perspective view of another embodiment, and FIG. FIG. 7 is a side view of the device installed, and FIG. 7 is a side view of the conventional device installed in the installation hole. C...Ceiling decorative board, H...Installation hole, T...Appliances, F...Mounting flange, D...Electric drill, 1...Shank, 2...Center, 3...Support part, 4...Hole saw tube, 5...Sawtooth, 6... Grinding surface, 7... Hole saw body, 8... Connecting means, 9... Through hole, 10... Connecting screw,
11...Screw hole.

Claims

[Scope of Claim for Utility Model Registration] 1. A shank that can be connected to the end of a rotating shaft of a prescribed electric drill, with a center formed at the tip thereof that matches the center of an installation hole to be formed in a ceiling decorative board; A support part is formed in series on the
A hole saw cylinder having a diameter corresponding to the diameter of the installation hole is formed on the supporting part surface near the center, and the opening edge of this hole saw cylinder has a plurality of saw teeth at appropriate intervals along the circumferential direction of the opening edge. A ceiling decoration characterized in that a grinding surface is formed on the outer edge of the hole saw cylinder near the center, and has a grinding surface having a size within a range that corresponds to the mounting flange of instruments around the installation hole. Hole saw for boards. 2. Several hole saw bodies of different sizes are formed by integrating a grinding surface with a predetermined width on the outer peripheral edge of a hole saw cylinder having a predetermined outer diameter, and a supporting portion is integrally formed with the shank, and the supporting portion surface A hole saw for a ceiling decorative board according to claim 1, wherein a hole saw body is exchangeably connected to the hole saw body through a connecting means. 3. Claim No. 3 for Utility Model Registration states that the connecting means is such that a connecting screw inserted through a drilled through-hole is screwed into one of a plurality of screw holes arranged concentrically in the support part. A hole saw for ceiling decorative boards as described in item 2.