JP3062490U - Ceiling drilling tool - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a drilling tool capable of safely performing ceiling drilling work in a sanitary working environment. A cylindrical cutter blade (5) having a cutting tip (4) provided at the end of a rotary shaft (3) of a motor (2), and an axial guide drill (7) extending forward from inside the cylinder of the cutter blade. A protective cover 10 having a cylindrical shape with a bottom and having a front opening and surrounding the cutter blade provided with a dust collection port 9 is loosely fitted to the rotating shaft. The cutter blade was detachably fixed to the rotating shaft, the protective cover was formed of a transparent body, and a holding portion 11 was provided outside the protective cover along the rotating shaft.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a drilling tool for forming a hole such as a mounting hole of a lighting device in a ceiling plate.

[0002]

[Prior art]

 Conventionally, as a drilling tool of this type, a tool in which a cylindrical cutter blade with a cutting tip provided at the end of a cylinder is detachably attached to the tip of a rotating shaft that is rotated by a motor, and is known as a ceiling plate. A circular hole is formed by rotating the rotating shaft against the cylinder end of the cutter blade.

[0003]

[Problems to be solved by the invention]

 Usually, various materials such as gypsum board, wood chipboard, and thin iron plate are used for the ceiling plate, and since rails and the like for supporting the ceiling plate are provided, cutting powder of various materials is used. Was spilled on the worker's face, the working environment was not hygienic, and there was a risk that the rails cut during the drilling work would fall.

An object of the present invention is to provide a drilling tool that can safely perform ceiling drilling work in a sanitary working environment.

[0005]

[Means for Solving the Problems]

 In the present invention, a cylindrical cutter blade provided with a cutting tip at the end of a rotating shaft rotated by a motor and an axial guide drill extending forward from inside the cylinder of the cutter blade are integrally formed. The above-described object is achieved by freely fitting a bottomed cylindrical protective cover surrounding the cutter blade, which is rotatably provided and which has an open front and is provided with a dust collection port, on the rotating shaft. The cutter blade is detachably fixed to the rotating shaft, the protection cover is formed of a transparent body, and a holding portion is provided outside the protection cover along the rotation shaft, thereby improving convenience. .

[0006]

[Embodiment of the invention]

 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a portable motor case having a built-in electric motor 2, and 3 denotes a rotating shaft rotated by the motor 2. . At the tip of the rotating shaft 3, a cylindrical cutter blade 5 having a cutting tip 4 such as a diamond chip attached to the end of the cylinder is detachably provided by a clamp 6, and the cutter blade 5 is provided from within the cylinder. A shaft-shaped guide drill 7 extending forward in the direction of the tip of the rotating shaft 3 is detachably provided by the clamp 6 so that when the rotating shaft 3 is rotated, the cutter blade 5 and the guide drill 7 rotate simultaneously. I made it. A plurality of cutter blades 5 are prepared, and the one suitable for the diameter of the hole to be opened in the ceiling is selected. The length of the tip of the guide drill 7 protruding forward of the cutter blade 5 is preferably set to be longer than the thickness of the ceiling plate 13.

The circumference of the cutter blade 5 is surrounded by a protective cover 10 made of transparent plastics having a bottom and having a cylindrical shape and having a front opening 8 and a dust collection port 9, which is loosely fitted to the rotating shaft 3. Was. Further, a cylindrical holding portion 11 is formed outside the protective cover 10 along the outer periphery of the rotating shaft 3, and the holding portion 11 is grasped and slid along the rotating shaft 3 during work. The opening 8 of the protective cover 10 was brought into contact with the ceiling surface. An exhaust hose 12 of a dust collector such as a vacuum cleaner is connected to the dust collecting port 9, and cutting dust from a ceiling plate 13 and a ceiling structural material 14 falling into the protective cover 10 is sucked by the dust collector. You.

The ceiling plate 13 is configured by, for example, attaching a finishing material 13 b to a gypsum board 13 a and fixed to a ceiling structural material 14 such as an M-shaped channel material suspended on a hanger 16 extending from the floor slab 15. A hole having an appropriate diameter is formed in the ceiling material 13 with a drilling tool in order to mount a ceiling-mounted lighting device or the like. When the drilling work is performed with the tool of the present invention, the dust collection port 9 is formed. Activate the dust collector connected to, lift the motor case 1, rotate the rotating shaft 3, make a guide hole with the guide drill 7 in the center of the part to be opened, hold the holding part 11, and move the protective cover 10 to the rotating shaft. 3, and the opening is brought into contact with the ceiling plate 13. Then, when the rotating shaft 3 is rotated while pressing the motor case 1 against the ceiling surface, the cutter blade 5 enters while cutting the ceiling plate 13 into an annular shape centering on the guide hole, and drilling can be performed with accurate positioning. The cutting powder generated in the space falls into the protective cover 10 and is removed from the dust collecting port 9, so that the surrounding environment is not impaired, and the cut-off ceiling plate and ceiling structural material are removed from the protective cover 10. The work is safely stopped because it is received by the robot. The cutting condition can be observed through the transparent protective cover 10. When changing the hole diameter, the clamp 6 is loosened and the cutter blade 5 is replaced.

[0009]

[Effect of the invention]

 As described above, according to the present invention, a cylindrical cutter blade and a shaft-shaped guide drill projecting forward from this are attached to the tip of the rotating shaft rotated by the motor, and are loosely fitted to the rotating shaft. Since the cutter blade is surrounded by a protective cover having a dust collection port, it can be drilled at an accurate position by the lead of a guide drill. The work environment becomes clean because the protective cover covers the falling and cut ceiling panel and ceiling structural material, so that the work can be performed safely. By doing so, it is possible to carry out the work quickly and to perform the work while observing the drilling state.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1;

[Explanation of symbols]

2 motor, 3 rotation axis, 4 cutting tip, 5 cutter blade, 6 clamp, 7 guide drill, 9 dust collection port, 10 protective cover, 11 holding section,

Claims (2)

[Utility model registration claims] 1. A cylindrical cutter blade provided with a cutting tip at the end of a rotary shaft rotated by a motor, and an axial guide drill extending forward from inside the cylinder of the cutter blade. 2. A ceiling drilling tool, wherein a bottomed tubular protective cover surrounding the cutter blade, which is open forward and surrounds the cutter blade, is loosely fitted on the rotating shaft. 2. The method according to claim 1, wherein the cutter blade is detachably fixed to the rotating shaft, the protective cover is formed of a transparent body, and a holding portion is provided outside the protective cover along the rotating shaft. The ceiling drilling tool according to claim 1.