JPH075935Y2 - Hole saw for ceiling makeup board - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a hole saw for a ceiling decorative board, in which various equipments such as a downlight, a speaker, and a disaster prevention sensor are attached to a ceiling decorative board having an uneven surface. The present invention relates to a hole saw for a ceiling decorative board, which is suitable for forming installation holes for instruments in construction.

(Prior Art) Conventionally, when mounting various devices such as a downlight, a speaker, and a disaster prevention sensor on a ceiling decorative board, there is a construction for forming an installation hole for these devices. This work involves attaching various equipment such as downlights, speakers, and disaster prevention detectors to a ceiling decorative board, which is a so-called makeup sound absorbing board with convex portions formed on the surface. Then, a hole was made with a cutter knife, a saw or the like to form an installation hole, and the irregularities on the peripheral surface of the installation hole were further scraped off with a cutter knife to form a ground surface.

However, not only is it very time-consuming to make a hole with a cutter knife or the like because it is a manual work, but the decorative sound absorbing plate itself is made of gypsum, so it is extremely fragile and opening work is difficult. Sometimes I failed.

Therefore, the applicant of the present application has already proposed a hole saw for a ceiling decorative board in which an installation hole having a predetermined diameter is formed in the ceiling decorative board in order to facilitate the work for forming an opening such as an installation hole (actually 63-21511 of Shokai). (See the official gazette). In the construction using this hole saw, apply a band-shaped saw tooth formed to match the specified diameter from the lower surface of the ceiling decorative board in the facility, cut the board and open an installation hole for inserting instruments, and With a doughnut-shaped file that is installed around the periphery, the uneven surface of the decorative board around the edge of the opening is ground to form a grinding surface, which serves as the abutting surface of the flange at the lower end of the installation tool, and the installation of the equipment , For stability.

(Problems to be solved by the invention) However, the installation hole opening construction using this hole saw for a ceiling decorative board has the following problems.

That is, the conventional hole saw cannot adjust the diameter of the installation hole and the area of the grinding surface formed around the opening of the installation hole. This means that the number of installation holes and grinding surfaces that can be formed by one hole saw is limited. However, there are a great variety of types and sizes of equipment attached to the ceiling decorative board. Therefore, in order to form the installation holes corresponding to such various instruments, it is necessary to use various hole saws adapted to the areas of the respective installation holes and the grinding surface, and as a result, for each type of installation instrument. There was the inconvenience of having to carry different hole saws all the time.

Therefore, this invention was devised in view of the above existing points, and the diameter of the installation hole and the area of the grinding surface can be adjusted individually, and moreover, adjustment of the cutting blade etc. at the time of use An object of the present invention is to provide a hole saw for a ceiling decorative board that can prevent the position from being misaligned.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the first means in the present invention is to insert and fix vertically to a ceiling decorative board P at the tip of a shank 1 formed to be connectable to an electric drill S. In the hole saw for a ceiling decorative board in which the center pin 2 is formed and the board-like hole saw base 3 that horizontally extends from the side surface of the shank 1, is formed on the board surface of the hole saw base 3 from the vicinity of the shank 1 to the hole saw base 3. A slide long hole 4 extending in the circumferential direction is formed, and a cutting blade 5 for cutting the installation hole P1 having a predetermined diameter on the ceiling decorative board P is formed on the upper surface of the hole saw base 3, and the ceiling decorative board P around the installation hole P1. The grinding body 6 for grinding the surface is mounted along the slide long hole 4 so that the position of the grinding body 6 can be adjusted.

Further, as a second means, the cutting blade 5 is provided on the cutting blade base 7 which is positionally adjustable along the slide long hole 4 of the hole saw base 3, and the grinding body 6 is mounted on the cutting blade base 7. It is provided on the grinding body base 8 mounted slidably in a direction substantially orthogonal to the cutting blade 5.

Further, as a third means, the cutting blade base 7 is screwed to the guide portion 10 that is locked to the lower surface side of the hole saw base 3 with a fastening screw 9 penetrating the slide long hole 4, while the hole saw base 7 In order to solve the problem, the locking projections 12 that fit into the position adjusting recesses 11 provided at predetermined intervals along the slide long holes 4 on the upper surface of the hole 3 are provided on the abutting surface of the hole saw base 3 of itself. And the means.

(Operation) That is, according to the first means of this invention, the center pin 2 is vertically inserted into the ceiling decorative board P, and the shank 1 which can be connected to the electric drill S and the shank 1 is horizontally extended from the side surface of the shank 1. The board-shaped hole saw base 3 is fixed.

Furthermore, the cutting blade 5 mounted on the upper surface of the hole saw base 3
And the grinding body 6 rotate together with the hole saw base 3 by the rotating force of the electric drill S, the cutting blade 5 cuts the installation hole P1 having a predetermined diameter on the ceiling decorative board P, and the grinding body 6 installs the installation hole P1.
The surrounding P surface of the decorative board is ground.

The positions of the cutting blade 5 and the grinding body 6 are freely adjustable along the slide elongated hole 4 extending in the circumferential direction of the hole saw base 3 from the vicinity of the shank 1, and the cutting blade 5 and the grinding body 6 are The turning radius of is adjusted.

Further, according to the second means, the position of the cutting blade base 7 is adjustable along the slide long hole 4, so that the position of the cutting blade 5 provided on the cutting blade base 7 is adjusted.

Further, the grinding body base 8 slidably mounted on the cutting blade base 7 is adjusted together with the movement adjustment of the cutting blade base 7, and the grinding body 6 mounted on the grinding body base 8 is
On the grinding body base 8, fine adjustment is performed so as to be slidable in a direction substantially orthogonal to the cutting blade 5.

Further, according to the third means, the set screw 9 penetrating the slide long hole 4 is engaged with the cutting blade base 7 on the upper surface of the hole saw base 3 and the guide portion 10 which is locked to the lower surface side of the hole saw base 3.
And are screwed, and the cutting blade base 7 is mounted along the slide long hole 4.

At this time, the cutting blade base 7 is provided with a locking projection 12 protruding from the contact surface of the hole saw base 3 itself.
By fitting in the position adjusting recess 11 on the upper surface, the adjusting position along the slide long hole 4 is fixed.

In this way, predetermined equipment such as a downlight, a speaker, a disaster prevention sensor, etc. is attached to the installation hole P1 opened to an arbitrary diameter, and the ground surface P2 around the installation hole P1 is attached.
The mounting flange of the instrument is closely attached to the.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 shown in the drawing indicates a predetermined electric drill S,
A shank for mounting a drill, which is detachably connected via a chuck S1, and a center pin 2 having a sharp tip is formed at the tip of the shank 1 for positioning the center of a hole (first). (See Figure 1).

In the middle of the shank 1 in the length direction, a hole saw base 3 having a substantially circular outer shape is continuously formed. The hole saw base 3 is fixed to the shank 1 by being sandwiched between a locking flange 2A provided at the lower end of the center pin 2 and a fixing nut 1A screwed from the lower end of the shank 1. As shown in the drawing, the hole saw base 3 is formed with a fan-shaped hole, a circular hole, or another through hole, and the ceiling decorative board C is formed.
The positioning confirmation of the center pin 2 to the hole saw base 3 is facilitated and the weight of the hole saw base 3 is reduced.

Further, on the board surface of the hole saw base 3, slide long holes 4 extending from the vicinity of the shank 1 in the circumferential direction of the hole saw base 3 are formed. In the illustrated slide long holes 4, three radial slide long holes 4 centering on the shank 1 are formed at equal intervals, but the number of the slide long holes 4 is not limited, and the slide long holes 4 are not limited. The length of 4 can also be set appropriately.

On the upper surface of the hole saw base 3, a cutting blade 5 for cutting the installation hole P1 having a predetermined diameter on the ceiling decorative board P and a grinding body 6 for grinding the ceiling decorative board P surface around the installation hole P1 are slid long holes. It is mounted so that its position can be adjusted along the line 4.

At this time, the cutting blade 5 is provided with saw teeth on the cutting blade base 7 which is mounted along the elongated slide hole 4 so as to be positionally adjustable. Further, instead of the saw teeth in the illustrated example, a sharp cutter-shaped object can be attached at a predetermined angle.

Further, by providing the grinding body 6 on the grinding body base 8 mounted on the cutting blade base 7, the cutting blade 5 and the grinding body 6 are provided.
It becomes possible to adjust the positions of and at the same time. Moreover,
Since the grinding body base 8 on which the grinding body 6 is provided is slidably mounted on the cutting blade base 7 in a direction substantially orthogonal to the cutting blade 5, the position of the grinding body 6 itself should be adjusted independently. It is also possible, and there is an advantage that the area of the grinding surface P2 formed around the installation hole P1 can be freely set. The grinding body base 8 shown in the drawing has a sliding groove 7A formed on the upper surface of the cutting blade base 7, a sliding protrusion 8A is provided on the lower surface of the grinding body base 8, and the two are fitted to each other to form the grinding body base 8 Is mounted substantially orthogonal to the cutting blade 5 and the grinding body base 8 is slidably adjusted (see FIG. 4).

The grinding body 6 provided on the grinding body base 8 is provided on the upper surface of the grinding body base 8 having a substantially trapezoidal shape, and the grinding body 6 fixes abrasive grains formed to have a predetermined roughness on a metal plate. And is formed into a file shape, and for example, a superhard tungsten carbide particle is firmly welded to a steel plate. In this way, clogging is less likely to occur and durability is excellent.

The mounting of the cutting blade base 7 on the slide good hole 4 is as follows. That is, the cutting blade base 7 has a good slide hole 4
A fixing screw 9 penetrating through is fixed to a guide portion 10 that is locked to the lower surface side of the hole saw base 3. On the other hand, a locking projection 12 is provided on the abutting surface of the hole saw base 3 of itself, and is fitted into the position adjusting recesses 11 provided at predetermined intervals along the slide long hole 4 on the upper surface of the hole saw base 3 (first (See Figures and 4). At this time, the guide portion 10 includes a guide protrusion 10B fitted into the elongated slide hole 4 and a fixing screw into which the cutting blade base 7 is inserted into the upper surface of the guide body 10A that is locked to the lower surface side of the hole saw base 3. Tap to screw 9
10C and is provided. Further, the position adjusting recesses 11 are provided in pairs on both sides of each of the slide elongated holes 4, and the cutting blade base 7 is provided.
The fixing force of the hole saw base 3 is increased, and the reinforcing rib 3A is provided along the slide long hole 4 on the lower surface of the hole saw base 3 to increase the strength of the hole saw base 3 itself (see FIG. 1). The reference numeral 3B is a cutting blade 5 along the slide long hole 4.
It is a scale that indicates the position of etc.

Next, when using this invention, as shown in FIG. 2, the center pin 2 is attached to the lower end of the shank 1 by chucking the electric drill S to form the installation hole P1 from the lower surface of the ceiling decorative board P. Insert vertically and fix. And
The cutting blade 5 on the hole saw base 3 is applied to the ceiling decorative board P, the hole saw base 3 is rotated while the electric drill S is controlled at an appropriate rotation speed, and the cutting blade 5 punches in a circular shape to peel it off.

As the cutting blade 5 pierces the ceiling decorative board P in a circular shape, when the grinding body 6 reaches the ceiling decorative board P surface, the grinding body 6
Grinds the surface of the ceiling decorative board P to smooth the convex portions.

Then, the decorative board P on the ceiling is cut by the cutting blade 5, and the notch P3 becomes the cutting depth just before it penetrates the plaster board Q on the upper surface of the decorative board P, while the decorative board P around the installation hole P1 has a convex surface. When the ground surface P2 having a predetermined depth is formed on the grinding body 6, the hole saw base 3 is removed. After the removal, the notch P3 is struck by a hammer or the like to be removed and opened to form an installation hole P1 (see FIG. 3).

Then, when the piercing work in a circular shape to be cut out as the installation hole P1 and the smoothing process in the range where the mounting flanges of the instruments are to be brought into contact are completed, the installation hole P1 that is opened,
Attach predetermined equipment such as downlights, speakers, disaster detectors, etc.

(Effect of the Invention) The present invention achieves the original purpose by being configured as described above.

That is, according to claim 1, the position of the cutting blade 5 and the grinding body 6 provided on the upper surface of the hole saw base 3 is adjusted along the slide long hole 4 extending from the vicinity of the shank 1 in the circumferential direction of the hole saw base 3. The radius of gyration of the cutting blade 5 and the grinding body 6 is adjusted. As a result, the diameter of the installation hole P1 and the grinding surface P2 can be freely set with one hole saw of the present invention, so it is inconvenient to prepare various hole saws adapted to different types and sizes of equipment. The problem has been solved, and it became extremely easy to attach various kinds of equipment such as downlights, speakers, disaster prevention detectors, etc. to the ceiling decorative board called the sound absorbing board.

Further, according to the second aspect, by adjusting the position of the cutting blade base 7 along the slide long hole 4, the positions of the cutting blade 5 and the grinding body 6 are adjusted at the same time, so that a quick adjustment operation can be performed. Moreover, since the grinding body 6 can be finely adjusted on the grinding body base 8 so as to be slidable in a direction substantially orthogonal to the cutting blade 5, the range of the grinding surface P2 suitable for a mounting flange of instruments is freely adjusted. It is possible.

Further, according to claim 3, the cutting blade base 7 has the locking projection 12
Is fitted into the position adjusting recess 11 so that the slide long hole 4
Since the adjustment position along with can be fixed, the cutting blade base 7 on the upper surface of the hole saw base 3 is securely fixed to the slide long hole 4. As a result, it is possible to reliably prevent the adjustment positions of the cutting blade 5 and the grinding body 6 from being displaced during the drilling work.

As described above, according to the present invention, the diameter of the installation hole,
Also, the area of the grinding surface can be adjusted respectively, and moreover, practically excellent effects such as deviation of the adjustment position of the cutting blade during use can be achieved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view showing a work of drilling an installation hole and a smoothing state of a ground surface, and FIG. FIG. 4 is a cross-sectional view showing a main part showing an opened state, and FIG. P ... Ceiling decorative board, P1 ... Installation hole, P2 ... Grinding surface,
P3 ... Notch, Q ... Gypsum board, S ... Electric drill, S1
...... Chuck, 1 ... Shank, 1A ... Fixing nut, 2 ... Center pin, 2A ... Flanging flange, 3 ... Hole saw base, 3A
...... Reinforcing ribs, 3B ... Scale, 4 ... Sliding slot, 5
…… Cutting blade, 6 …… Grinding body, 7 …… Cutting blade base, 7A…
… Sliding groove, 8 …… Grinding body base, 8A …… Sliding ridge, 9…
… Fixing screw, 10 …… Guide part, 10A …… Guide body, 10B…
… Guide protrusion, 10C… Tap, 11… Position adjustment recess, 1
2 ... Locking protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tamio Kanzawa 27 Torimachi, Miki City, Hyogo Prefecture Kanzawa Iron Works Co., Ltd. (72) Inventor Haruhiko Nagai 1-3-3 Chuo, Edogawa-ku, Tokyo Brest Industrial Research Co., Ltd. In-house (56) Reference Japanese Patent Laid-Open No. Sho 48-65590 (JP, A) Actual Open Sho 63-21511 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A shank formed so as to be freely connectable to an electric drill is formed with a center pin vertically inserted into and fixed to a ceiling decorative board, and a plate-like hole saw base horizontally projected from the side surface of the shank is formed. In the case of a hole saw for a ceiling decoration board, a slide long hole extending from the vicinity of the shank in the circumferential direction of the hole saw base is formed on the board surface of the hole saw base, and an installation hole of a predetermined diameter is installed on the ceiling decoration board on the upper surface of the hole saw base. A hole saw for a ceiling decorative board, in which a cutting blade for cutting and a grinding body for grinding on the surface of the ceiling decorative board around the installation hole are mounted so that the position can be freely adjusted along the slide long hole. 2. A cutting blade is provided on a cutting blade base that is positionally adjustable along a slide long hole of a hole saw base, and a grinding body is substantially orthogonal to the cutting blade on the cutting blade base. The ceiling saw board hole saw according to claim 1, wherein the hole saw is provided on a grinding body base that is slidably mounted in a predetermined direction. 3. The cutting blade base is screwed to a guide portion which is locked to the lower surface side of the hole saw base with a fastening screw penetrating the elongated slot hole, and along the slide elongated hole on the upper surface of the hole saw base. 3. The hole saw for a ceiling decorative board according to claim 1 or 2, wherein the locking projections that fit into the position adjusting recesses provided at predetermined intervals are provided on the contact surface of the hole saw base.