JPH0737772Y2 - 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 kinds of equipment such as downlights, speakers, and disaster prevention detectors are attached to a ceiling decorative board having an uneven surface. In this case, the present invention relates to a hole saw for a ceiling decorative board suitable for forming an installation hole for instruments.

(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 unevenness of the decorative board surface at the edge of the opening is shaved to form a grinding surface, which serves as the contact surface of the flange provided on the bottom surface 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 wide variety of sizes of equipment to be 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, it is necessary to use various hole saws for each type of installation instrument. There was the inconvenience of having to carry a hole saw all the time.

Therefore, as a result of diligent research, it was possible to eliminate the conventional inconveniences by providing the saw teeth and files of the hole saw on the upper surface of the hole saw base so that the position of the saw was adjusted and the file size of the installation hole and the area of the grinding surface were adapted. . However, if the fixing means of the saw teeth and the file are made strong in order to prevent the adjustment position from being misaligned during use, the position adjustment work will become extremely complicated, and the position adjustment work of the saw teeth and the file will be facilitated. Then, there arises a new problem that the adjustment position is apt to be misaligned due to vibration during use.

Therefore, the present invention has been devised in view of the above problems, and in the case of a ceiling saw board hole saw in which the diameter of the installation hole and the area of the grinding surface can be adjusted, the adjustment position during use is incorrect. It is an object of the present invention to provide a hole saw for a ceiling decorative board that can reliably prevent the position of the saw blade and the file and can very easily adjust the position of the file.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the means of the present invention comprises a center pin 2 provided at the tip of a shank 1 formed to be connectable to an electric drill S, and a horizontal pin from the side surface of the shank 1. A board-shaped hole saw base 3 and a cutting blade 5B provided on the upper surface of the hole saw base 3 for cutting the installation hole P1.
And a grinding body 5D that grinds the peripheral surface of the installation hole P1 and a guide plate 6 that is superposed on the lower surface of the hole saw base 3 and is rotatable about the shank 1 to form the hole saw base 3 Is formed with a slide long hole 4 linearly extending from the vicinity of the shank 1 in the circumferential direction of the hole saw base 3, and on the upper surface of the guide plate 6, a spiral guide centering around the shank 1 is formed. The groove 6A is formed, and the lower end of the guide pin 7 that penetrates the slide elongated hole 4A from the lower surface of the cutting body 5 is formed into the guide elongated hole.
The guide plate 6 is slidably inserted into the guide plate 6, and the guide plate 6 is provided with rotary teeth 6B on its peripheral edge. A means for solving the problem is to provide a stopper 10 which can be inserted into the side surface of the adjusting gear so as to be freely inserted therein.

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

Further, the cutting body 5 mounted on the upper surface of the hole saw base 3
However, due to the rotating force of the electric drill S, the hole saw base 3
Each of them is rotated and a mounting hole P1 having a predetermined diameter is cut and opened in the ceiling decorative board P.

The cutting body 5 connected to the guide pin 7 has a slide long hole 4 extending linearly in the circumferential direction of the hole saw base 3 from the vicinity of the shank 1 on the board surface of the hole saw base 3.
The lower end of the guide pin 7 penetrating through the guide plate 6 is slidably inserted into the elongated guide hole 6A on the upper surface of the guide board 6, and the guide plate 6 is rotated to adjust the position.

Further, according to the second means, the guide plate 6 is rotationally interlocked by rotating the adjusting gear 8 meshed with the rotary tooth 6B provided on the peripheral edge of itself. Then, when the stopper 10 is inserted into the side surface of the adjusting gear 8, the rotation of the adjusting gear 8 is restricted.

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 is a shank for mounting a drill, which is detachably connected to a rotary shaft end of a predetermined electric drill S via a chuck S1, and at the tip of the shank 1, a center position for drilling is determined. For use, a center pin 2 having a sharp tip is formed (see FIG. 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, for example, a locking flange 1A provided on the upper end of the shank 1 and a fixing screw 1B that is pressed against the locking flange 1A. At this time, as shown in the figure, the hole saw base 3 may be formed in a disk shape, or may be formed in a hollow container shape that protects the guide board 6 by enclosing the guide board 6 described later (not shown). .

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. Reference numeral 3B is a scale indicating a position along the slide long hole 4.

On the upper surface of the hole saw base 3, a cutting body 5 for cutting the installation hole P1 having a predetermined diameter on the ceiling decorative board P is mounted along the slide long hole 4 so that the position of the cutting body 5 can be adjusted.

On the other hand, a spiral guide long hole 6A centering on the shank 1 is formed on the upper surface of the guide board 6, and the lower end of the guide pin 7 penetrating the slide long hole 4 from the lower surface of the cutting body 5 is formed into the guide long hole.
Insert slidably into 6A. At this time, the rotating teeth 6B are provided on the peripheral edge of the guide board 6 itself, and the adjusting gear 8 that meshes with the rotating teeth 6B is provided on the hole saw base 3. By rotating the adjusting gear 8, The disc 6 is interlocked and the cutting body 5 in which the guide pin 7 is inserted into the elongated guide hole 6A is moved along the elongated slide hole 4 (see FIGS. 1 and 5).

To fix the adjustment position of the cutting body 5, a stopper 10 that restricts the rotation of the adjustment gear 8 is used. That is, the stopper 10 is provided so as to be freely inserted into the side surface of the adjusting gear 8. In the illustrated example, the stopper 10A that meshes with the adjusting gear 8 and the gripping rod that fixes the hole saw base 3 at a proper position in a sliding position. 10B, and further, the locking piece 10A, the adjustment gear 8 all the time,
It is composed of a spring 10C for pressing and urging. When adjusting the guide plate 6, the gripping rod 10B is pulled to free the adjusting gear 8, and after adjusting the guide plate 6, the gripping rod 10B is released to release the elastic force of the spring 10C. Then, the locking piece 10A meshes with the adjusting gear 8 (see FIG. 5).

The cutting body 5 has a cutting blade 5B for cutting the installation hole P1 having a predetermined diameter on the ceiling decorative board P, and a ceiling around the installation hole P1 on the base body 5A mounted on the slide elongated hole 4 so as to be positionally adjustable. A grinding body 5D for grinding the P surface of the decorative board is provided (see FIG. 4). Further, the cutting blade 5B shown in the drawing is 5 to 10
It has about saw teeth. At this time, as the cutting blade 5B, a sharp cutter-shaped object can be attached at a predetermined angle.

Further, by providing the grinding body 5D on the grinding body base 5C mounted on the base body 5A, the positions of the cutting blade 5B and the grinding body 5D can be simultaneously adjusted. Moreover, since the grinding body base 5C is mounted slidably in a direction substantially orthogonal to the cutting blade 5B, the position of the grinding body 5D itself can be adjusted independently, and the periphery of the installation hole P1 can be adjusted. There is an advantage that the area of the grinding surface P2 to be formed on can be freely set.
The illustrated grinding body base 5C has a sliding groove 5E on the upper surface of the base body 5A.
Is formed, and the sliding protrusion 5F is provided on the lower surface of the grinding body base 5C,
By fitting the both, the grinding body base 5C is mounted substantially orthogonal to the cutting blade 5B, and the grinding body base 5C is slidably adjusted (see FIG. 4). Also, grinding body 5D
Is provided on the upper surface of the substantially trapezoidal grinding body base 5C,
This grinding body 5D is an abrasive grain formed to have a predetermined roughness, which is fixed to a metal plate and formed into a file, for example,
Ultra-hard tungsten carbide particles are firmly welded to a steel plate. This will prevent clogging,
Has an effect of excellent durability.

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 5B on the hole saw base 3 is applied to the ceiling decorative board P, the hole saw base 3 is rotated while controlling the electric drill S at an appropriate rotation speed, and the cutting blade 5B is used to make a circular shape and peel it off.

As the cutting blade 5B punches the ceiling decorative board P into a circular shape, the grinding body 5D reaches the ceiling decorative board P surface, and the grinding body 5D
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 5B on the hole saw base 3, and this cut P3 becomes the cut depth just before it penetrates the plaster board Q on the upper surface of the decorative board P, while the cut hole P1 around the installation hole P1. When the ground surface P2 having a predetermined depth is formed by the grinding body 6 on the convex surface of the decorative board P, the hole saw base 3 is removed. After removing, the notch P3 part is hit with a hammer or other tool to remove and open, and the 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, the cutting body 1 provided on the upper surface of the hole saw base 3
The position of the cutting blade can be adjusted by rotating the guide plate 6 along the linear elongated slide hole 4 extending in the circumferential direction of the hole saw base 3 from the vicinity of the shank 1.
The turning radius of 5B and the grinding body 5D is adjusted. As a result, the diameter of the installation hole P1 and the grinding surface P2 can be set with only this invented hole saw.

In addition, the guide plate 6 is provided with the rotary teeth provided on its peripheral edge.
By rotating the adjusting gear 8 meshed with 6B, the guide plate 6 becomes rotatable and the turning radius of the cutting body 5 is adjusted, so that the position adjustment work of the cutting blade 5B and the grinding body 5D is extremely quick, And it can be done easily.

Moreover, when the stopper 10 is inserted into the side surface of the adjusting gear 8, the rotation of the adjusting gear 8 is restricted, so that the guide board 6
Is fixed, and the slide position of the guide plate 6 and the adjustment position of the cutting body 5 on the hole saw base 3 are fixed. As a result, it is possible to reliably prevent the adjustment position of the cutting body 5 from being displaced during use.

As described above, according to the present invention, the diameter of the installation hole,
In addition, in the case of a ceiling saw board hole saw whose grinding surface area can be adjusted respectively, it is possible to reliably prevent adjustment position deviation during use, and to perform position adjustment work of the cutting blade and cutting body very easily. It has excellent practical effects.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a cross-sectional view showing a drilling work of an installation hole and a smoothing state of a ground surface, and FIG. FIG. 4 is a sectional view showing a cutting body, FIG.
The figure is a cross-sectional view showing an adjusting gear. P ... Ceiling decorative board, P1 ... Installation hole, P2 ... Grinding surface,
P3 ... Notch, Q ... Gypsum board, S ... Electric drill, S1
...... Chuck, 1 ... Shank, 1A ... Locking flange,
1B: Fixing screw, 2 ... Center pin, 3 ... Hole saw base, 3A ... Scale, 4 ... Sliding long hole, 5 ...
Cutting body, 5A …… Base body, 5B …… Cutting blade, 5C …… Grinding body base, 5D …… Grinding body, 5E …… Sliding groove, 5F …… Sliding ridge, 6 …… Guide panel, 6A ...... Guide elongated hole, 6B ...... Rotating tooth, 7 ...... Guide pin, 8 …… Adjustment gear, 9 …… Fixing nut, 10 …… Stopper, 10A …… Locking piece, 10B …… Grip rod, 10C… …spring.

 ─────────────────────────────────────────────────── ─── 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) References JP-A-48-65590 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A center pin provided at the tip of a shank that is freely connectable to an electric drill, a plate-like hole saw base that juts out horizontally from the side of the shank, and a cutting blade that is provided on the upper surface of the hole saw base to cut an installation hole. And a grinding body that grinds the peripheral surface of the installation hole, and a guide board that overlaps the lower surface of the hole saw base and is rotatably provided around the shank, and is formed on the board surface of the hole saw base near the shank. To form a slide long hole that extends linearly in the circumferential direction of the hole saw base,
On the other hand, a spiral guide long hole centering on the shank is formed on the upper surface of the guide board, and the lower end of the guide pin that penetrates the slide long hole from the lower surface of the cutting body is slidably inserted into the guide long hole. , The guide board is provided with rotary teeth on its peripheral edge,
A hole saw for a ceiling decorative board, characterized in that an adjusting gear that meshes with the rotating teeth is provided on a hole saw base, and a stopper that restricts rotation of the adjusting gear is provided so as to be freely inserted into a side surface of the adjusting gear.