JPH0737771Y2 - 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, with the former hole saw, the diameter of the installation hole and the area of the grinding surface formed around the opening of the installation hole cannot be adjusted. 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, 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 present invention is directed to a center pin 2 provided at the tip of a shank 1 which is formed so as to be connectable to an electric drill S, and a board which juts out horizontally from the side surface of the shank 1. A body-shaped hole saw base 3, a cutting body 5 provided on the upper surface of the hole saw base 3, and a guide plate 6 which is superposed on the lower surface of the hole saw base 3 and is rotatable around the shank 1, are formed. On the board surface, a slide long hole 4 extending linearly in the circumferential direction of the hole saw base 3 from the vicinity of the shank 1 is formed. On the other hand, on the plate surface of the guide plate 6, from the vicinity of the shank 1 of the hole saw base 3 is formed. Is extended in an arc shape in the circumferential direction, and
A guide slot 6A that intersects with the slide slot 4 is formed, and a guide pin 7 that penetrates through the intersection of the slide slot 4 and the guide slot 6A and is positionally adjustable along each slot is provided with an installation hole. A cutting blade 5B that cuts P1 and a grinding body 5D that grinds the ceiling decorative board P surface around the installation hole P1 are provided. The guide plate 6 has an adjusting bolt 8 projecting from its upper surface, The adjusting bolt 8 is slidably inserted into the arc-shaped adjusting hole 3B opened on the board surface, and the adjusting bolt 8 is fixed to the hole saw base 3 with the fixing nut 9 which is screwed to the adjusting bolt 8 on the upper surface of the hole saw base 3. There is something I did.

(Operation) That is, according to this invention, the center pin 2 is vertically inserted into the ceiling decorative board P,
Shank 1 connected to electric drill S and this shank 1
A board-like hole saw base 3 that horizontally extends from the side surface is 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.

Then, on the plate surface of the hole saw base 3, a slide long hole 4 linearly extended in the vicinity of the shank 1 or in the circumferential direction of the hole saw base 3, and a circle of the hole saw base 3 from the vicinity of the shank 1 on the plate surface of the guide plate 6. The guide pin 7 that extends in an arc shape in the circumferential direction and penetrates the intersection with the guide slot 6A that intersects the slide slot 4 becomes position-adjustable by rotating the guide plate 6. A grinding body 5 having a cutting blade 5B provided on the pin 7 for cutting the installation hole P1 and a grinding body 5D for grinding the ceiling decorative board P surface around the installation hole P1 is provided in the slide long hole 4 on the upper surface of the hole saw base 3. The position can be adjusted along the line.

Further, by sliding the adjusting bolt 8 projecting on the upper surface of the guide plate 6 along the adjusting hole 3B on the plate surface of the hole saw base 3, the guide plate 6 becomes rotatable. Further, by tightening the fixing nut 9 on the upper surface of the hole saw base 3, the adjusting bolt 8 is fixed to the hole saw base 3, and the slide position of the guide plate and the adjusting position of the cutting body 5 on the hole saw base 3 are fixed. It is something.

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 through a chuck S1, and at the tip of the shank 1, a center of a hole is formed. A center pin 2 having a sharp tip is formed for positioning (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.
See figure). 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, a linear slide long hole 4 extending in the circumferential direction of the hole saw base 3 from the vicinity of the shank 1 is formed on the board surface of the hole saw base 3. Sliding long hole 4 in the illustrated example
, Three radial slide slots 4 centered around the shank 1 are formed at equal intervals, but the number of the slide slots 4 is not limited, and the length of the slide slots 4 is also set appropriately. It is possible. Reference numeral 3B is a scale indicating a position along the slide long hole 4.

Reference numeral 6 is a guide plate which is superposed on the lower surface of the hole saw base 3 and is provided so as to be rotatable around the shank 1 (second).
See figure). This guide plate 6 extends on its own plate surface in a circular arc shape from the vicinity of the shank 1 in the circumferential direction of the hole saw base 3 and intersects with the slide elongated hole 4.
Form 6A. Then, the cutting body 5 is connected to the guide pin 7 which penetrates the intersection of the slide long hole 4 and the guide long hole 6A and is positionally adjustable along each long hole (see FIG. 6).

The adjustment position of the cutting body 5 is fixed by connecting and fixing the hole saw base 3 and the guide plate 6. That is, the guide plate 6 has an adjusting bolt 8 projecting from the upper surface thereof, and the adjusting bolt 8 is slidably inserted into an arc-shaped adjusting hole 3B opened in the board surface of the hole saw base 3, and a hole nut is fixed by a fixing nut 9. The adjusting bolt 8 is fixed to the upper surface of the base 3.

On the other hand, 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 can be adjusted. At this time, 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 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 surrounding ceiling decorative board P surface is provided. At this time, the illustrated cutting blade 5B has saw teeth having about 5 to 10 teeth. In addition to this, it is also possible to attach a sharp cutter-shaped blade as the cutting blade 5B at a predetermined angle.

Further, by providing the grinding body 5D on the grinding body base 5C mounted on the base body 5, it becomes possible to adjust the positions of the cutting blade 5B and the grinding body 5D at the same time. 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.
To form a sliding protrusion 5F 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. 5).

The grinding body 5D is provided on the upper surface of the substantially trapezoidal grinding body base 5C, and the grinding body 5D is formed into a file by fixing abrasive grains formed to have a predetermined roughness on a metal plate. For example, it is one in which ultra-hard tungsten carbide particles are firmly welded to a steel plate. In this way, clogging is less likely to occur and durability is excellent.

Next, when using the present invention, as shown in FIG. 3, the electric drill S is chucked to the lower end of the shank 1 and the center pin 2 is attached from the lower surface of the ceiling decorative board P forming the installation hole P1. 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.

And the decorative board P on the ceiling is the cutting blade 5B of the hole saw R.
And the cut P3 becomes a cut depth just before it penetrates the plaster board Q on the upper surface of the decorative board P, while
The hole saw base 3 is removed when a grinding surface P2 having a predetermined depth is formed by the grinding body 6 on the convex surface of the decorative board P around the installation hole P1. 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. 4).

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.

Further, by sliding the adjusting bolt 8 projecting on the upper surface of the guide plate 6 along the adjusting hole 3B of the hole saw base 3 board surface, the guide plate 6 becomes rotatable and the turning radius of the cutting body 5 is adjusted. Therefore, the position adjustment work of the cutting blade 5B and the grinding body 5D can be performed extremely quickly and easily.

Moreover, by tightening the fixing nut 9 on the upper surface of the hole saw base 3, the adjusting bolt 8 is fixed to the hole saw base 3, and the slide position of the guide plate 6 and the adjusting position of the cutting body 5 on the hole saw base 3 are fixed. To be done. As a result, it is possible to reliably prevent the adjustment position 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 an exploded perspective view showing a hole saw base and a guide plate, and FIG. 3 is a work for making an installation hole and a ground surface. FIG. 4 is a sectional view showing a state of smoothing treatment, FIG. 4 is a sectional view showing an essential part of the installation hole, and FIG. 5 is a sectional view showing a cutting body.
FIG. 6 is a bottom view showing the guide plate. 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, 3B ... Adjustment hole, 4 ... Sliding slot, 5 ... Cutting body, 5A ... Base body, 5B ... … Cutting blade, 5C …… Grinding body base, 5D …… Grinding body, 5E …… Sliding groove, 5F …… Sliding ridge, 6 …… Guide plate, 6A …… Guide slot, 7 …… Guide pin , 8 ... Adjusting bolt, 9 ... Fixing nut.

Front page continued (72) Inventor Tamio Kanzawa 27 Torimachi, Miki City, Hyogo Prefecture Kanzawa Iron Works Co., Ltd. (72) Inventor Haruhiko Nagai Chuo 1-3-3 Chuo, Edogawa-ku, Tokyo Inside Brest Industrial Research Institute (72) ) Inventor Fujio Tadano 1-3-3 Chuo, Edogawa-ku, Tokyo Inside Brest Industrial Research Institute Co., Ltd. (56) Reference JP-A-48-65590 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A center pin provided at a tip of a shank that is freely connectable to an electric drill, a plate-like hole saw base that horizontally projects from a side surface of the shank, a cutting body provided on an upper surface of the hole saw base, and a lower surface of the hole saw base. And a guide plate that is rotatably provided around the shank, and is formed on the board surface of the hole saw base so as to linearly extend in the circumferential direction of the hole saw base from the vicinity of the shank. , A guide slot extending from the vicinity of the shank in an arc shape in the circumferential direction of the hole saw base and intersecting the slide slot is formed on the plate surface of the guide plate. A guide pin that penetrates the intersection and can adjust the position along each long hole, and a cutting blade that cuts the installation hole and the ceiling decorative board surface around the installation hole Connecting the grinding bodies Toka comprising cutting body occupied, the guide plate is projected the adjusting bolt on the upper surface of itself,
The adjustment bolt is slidably inserted into an arc-shaped adjustment hole opened on the board surface of the hole saw base, and the adjustment bolt is fixed to the hole saw base with a fixing nut that is screwed to this adjustment bolt on the top surface of the hole saw base. A hole saw for ceiling makeup boards.