JPH1058393A - Box hole drilling ruler for inner wall material and method for drilling box hole through inner wall material using the ruler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently drill a box hole through an inner wall material forward of a box easily and quickly. SOLUTION: A box hole drilling ruler for an inner wall material is detachably jointed to the opening of a box 4 fixed to a building and formed to have a plurality of guide holes 3 for inserting the center rod 11 of a hole saw 7. The center rod 11 of the hole saw 7 is inserted in any of the guide holes 3, and the hole saw 7 is prevented from being dislocated, by the help of the guide hole 3 and the center rod 11. Then, a plurality of holes are drilled through the interior wall material 22 with the hole saw 7 for forming a box hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ruler used to provide a switch box or an outlet box hole in an inner wall material during electric work, and a box hole in the inner wall material using the ruler. It is related to the method of providing.

[0002]

2. Description of the Related Art Boxes, such as switches and outlets,
It is constructed as follows. Before fixing the interior wall material, fix the box to the pillar or wall of the building. Fix the inner wall material. In this state, the box disappears. The position of the box is searched from the outside of the inner wall material, and a box hole is provided in the front of the box. In this way, when electrical work is performed, if the inner wall material is adhered, the box is covered and becomes invisible. Therefore, in order to find the position of the box, a detection plate with magnet 24 shown in FIG. 8 is commercially available. If the detection plate 24 is housed in a box, the position of the box can be detected using a magnetic detector from outside the inner wall material. Once the position of the box is known, a small hole is drilled in the inner wall material with a drill, and the inner wall material is cut out with a knife while checking the box inside, and a box hole is provided in the front of the box.

[0003] This method has the disadvantage that it takes a very long time to accurately make a box hole. Also, if the knife is accidentally widened with a knife, it is necessary to fix the putty and correct it. In order to avoid this state, it is necessary to carefully cut the inner wall material and to perform the construction so that the box hole does not become larger than the box.

[0004]

SUMMARY OF THE INVENTION The present inventor has considered whether a hole saw can be used without using a knife for the operation of forming a box hole in the inner wall material. Since a hole saw can easily make a large hole, it can cut the inner wall material much more efficiently than a knife. In particular, even for an inner wall material such as plywood that is very troublesome to cut with a knife, a large hole can be easily opened. However, the hole saw can open a circular hole, but cannot open a rectangular box hole in the front of the box. Since the box has a rectangular opening, it is necessary to open a box hole having a shape similar to the opening of the box in the inner wall material.

[0005] The hole saw can open an oval box hole by opening a plurality of circular holes with the center shifted. However, it is practically almost impossible to open two holes approaching each other using a hole saw. This is because the hole that opens first can be opened without displacement, but the next time that the hole is opened, the center bar cannot be positioned with the inner wall material.

[0006] The present invention has been developed to solve these disadvantages. An important object of the present invention is to provide a simple and easy and quick method for positioning the inner wall material in front of a box. An object of the present invention is to provide a box hole ruler for an inner wall material capable of efficiently opening a box hole, and a method for providing a box hole in the inner wall material using the ruler.

[0007]

According to the present invention, a box-piercing ruler for an inner wall material is detachably connected to an opening of a box 4 fixed to a building. Further, the ruler has a plurality of guide holes 3 for inserting the center rod 11 of the hole saw 7.
Is provided. The center bar 11 of the hole saw 7 is inserted into the guide hole 3, and the hole saw 7 is prevented from being displaced between the guide hole 3 and the center bar 11.
Thus, a plurality of holes are missing in the inner wall material 22 to open the box holes 23.

Further, the box hole ruler for the inner wall material according to the second aspect of the present invention is designed to easily and accurately search for the position of the box while being hidden by the inner wall material 22.
At the center of the ruler, a magnet 2 having a central hole 2a is fixed.

Further, in the method of providing a box hole in an inner wall material using a ruler according to claim 3 of the present invention, a plurality of guide holes 3 are opened in an opening of a box 4 fixed to a building. Connecting the ruler, fixing the inner wall material 22 on the surface of the box 4 to which the ruler is fixed, searching for the box position from the surface of the inner wall material 22, and opening the box hole 23 near the box 4 A step of inserting the center rod 11 of the hole saw 7 into the guide hole 3 of the ruler and opening a box hole 23 in the inner wall material 22 so that the hole saw 7 does not shift with the center rod 11 and the guide hole 3; Removing the ruler from the box 4 after opening the opening 23.

[0010]

The ruler of FIGS. 1-5, showing a preferred embodiment of the present invention, is used as follows to open a box hole in the inner wall material. As shown in FIG. 3, the ruler on which the magnet 2 is fixed is fixed to the opening of the box 4 with screws 5. As shown in FIG. 4, the box 4 to which the ruler is fixed is
It is fixed to the pillar 21. After that, the inner wall member 22 is fixed. The magnet 2 is searched from the outside of the inner wall material 22 using a detector, and the position of the ruler is specified. Rulers without magnets use a metal sensor to detect the position of a metal ruler or metal box. In the center portion of the detected box 4, a hole is provided in the inner wall material 22 so that the inside can be seen with a drill. Thereafter, as shown in FIG. 4, the center rod 11 of the hole saw 7 is inserted into the guide hole 3 provided at the center of the ruler, so that the position of the hole saw 7 does not shift, and a circular hole around the guide hole 3 is formed. Open. Further, the center rod 11 of the hole saw 7 is inserted into the guide holes 3 on both sides, and circular holes are formed on both sides of the center hole. As shown in FIG. 5, box holes 23 of three circular holes approaching each other are opened. I do. When a circular hole is opened by the hole saw 7 on both sides of the center hole, the center rod 11 is inserted into the guide holes 3 provided on both sides of the ruler, and the inner wall material 22 is cut by the hole saw 7 so as not to be displaced. After opening the box hole 23, the screw 5 is removed, and the ruler is removed from the box 4. In the above steps (1) to (4), a box hole is opened in the inner wall material.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a ruler for embodying the technical idea of the present invention and a method of using the same, and the present invention does not specify the ruler and the method of using the ruler as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

In the ruler shown in FIGS. 1 to 3, a magnet 2 having a center hole 2a is fixed to a center of a base 1 on a center line. The base 1 is made of a non-magnetic material such as plastic or aluminum so as not to disturb the magnetism of the magnet 2. In addition, this ruler is at the center of the base 1,
A guide hole 3 for inserting a center bar of a hole saw is provided. Guide holes 3 are opened on both sides of the magnet 2 on the center line of the base 1. Guide holes 3 on both sides
The box 4 is provided within the outer diameter of the hole saw formed by the center guide hole 3 and is opened by inserting the center rod of the hole saw into the three guide holes 3.
Open a box hole in the front of the box.

Further, mounting holes 6 for connecting the base 1 to the box 4 with screws 5 are provided at both ends of the ruler. Thus, the ruler that connects the mounting hole 6 to the box 4 with the screw 5 is such that when a circular hole is opened in the inner wall material with a hole saw,
The feature is that the center rod can be securely supported so as not to move.

FIG. 4 shows a hole saw with a center bar which can be conveniently used to open a circular hole in the inner wall material using the ruler shown in FIGS. The hole saw 7 shown in this figure is provided with a grip 9
Having. The cylinder shaft 8 has a slide hole 8a inside,
A female screw is provided at the tip of the slide hole 8a, and a bearing 10 provided with a male screw on the outer periphery is screwed and connected to the female screw. The bearing 10 has a shaft hole 10a at its tip for sliding the center rod 11 in the axial direction. The center rod 11 has a flange 12 at the rear end and has a structure that does not come off the bearing 10.

The cylinder shaft 8 incorporates a coil spring 13 which is a pressing spring. The coil spring 13 presses the flange 12 of the center rod 11 to elastically push the center rod 9. The center rod 11 has a rounded tip so that it can be easily inserted into the guide hole 3 of the ruler.

A cylindrical blade 14 for cutting the inner wall material 22 is connected to the bearing 10 in a shape like a saw blade. A center bar 11 is disposed at the center of the cylindrical blade 14 so as to elastically move in and out in the axial direction.

The ruler having the above structure is used as follows to open a box hole in the inner wall material. A ruler having three guide holes 3 is fixed to the opening of the box 4 with screws 5. The screw 5 penetrates the mounting hole 6 of the ruler and is screwed into the screw hole 15 of the box 4 to fix the ruler to the box 4. However, as shown in FIG. 6, the ruler is a box 4 with elastic claws 16 which are elastically expanded.
Can also be connected. The elastic claw 16 in this figure has two legs 16a that are elastically expanded. The tips of the legs 16a are curved in a direction approaching each other so as to be easily inserted into the mounting holes 6 of the ruler and the screw holes 15 of the box 4. The two elastic claws 16 approach each other when inserted, and when inserted into the mounting hole 6 and the screw hole 15, they are elastically expanded to connect the ruler to the box 4.

Further, the ruler has a structure shown in FIG.
It can also be connected to box 4. This ruler has slits 17 at both ends. The slit 17 is provided with a protrusion 4 a provided on the box 4 for providing the screw hole 15.
And the ruler is connected to the box 4. The slit 17 is provided in a shape substantially equal to the outer shape of the protrusion 4a so as to fit the protrusion 4a of the mountain shape so as not to shift laterally.
One of the slits 17 is provided on a pressing piece 19 connected to the base 1 so as to be elastically movable in parallel via two rods 18. Between the pressing piece 19 and the base 1,
A coil spring 20, which is a pressing spring, is inserted.

When the base 1 is pushed in the direction of the pressing piece 19 as shown by the arrow A in the state where the slit 17 of the pressing piece 19 is inserted into the projecting portion 4a of the box 4, the coil spring 20 Are compressed to shorten the overall length, and the slit 17 on the opposite side can be guided to the protrusion 4 a of the box 4. The ruler of this structure has a feature that it can be connected to the box 4 very simply and quickly.

The ruler shown in FIG. 7 does not fix the magnet. A ruler without a magnet detects the position of the box with a metal sensor, or detects the position of the box and the ruler with a metal sensor to detect the exact position of the box. A ruler for detecting a position with a metal sensor is made of a magnetic metal such as iron. The ruler that is not detected by the metal sensor is made of a non-magnetic material such as plastic or aluminum.

As shown in FIG. 5, the box 4 to which the ruler is fixed is fixed to a pillar 21 of a building or the like. However, the boxes are not necessarily fixed to the pillars of the building. It may be fixed to a wall core or the like. Box 4 is preferably fixed to the building after fixing the ruler. However, after the box is fixed to the building, a ruler can be fixed to the opening of the box.

An inner wall member 22 is fixed to the surface of the box 4 fixed to a building and fixing a ruler at a fixed position of an opening. Most commonly, gypsum board is used for the inner wall material 22. However, plywood and other board materials may be used for the inner wall material. However, since the inner wall member 22 detects the magnet 2 and metal disposed inside, a metal plate for magnetic shielding is not used.

When the inner wall member 22 is fixed, the box 4 is hidden by the inner wall member 22 and cannot be seen. In this state,
The position of the box is detected from the surface of the inner wall material 22 using a magnetic sensor or a metal sensor. The magnetic sensor detects the position of a ruler fixing the magnet 2. The metal sensor detects the position of the box 4 or the metal ruler. A small hole is opened using a drill near the center of box 4 which seems to be the center. The ruler is searched by looking inside the inner wall material 22 from the hole.
A hole is drilled in a portion of the inner wall material 22 located at the center of the ruler, or the inner wall material 22 is cut with a knife,
The inner wall material 22 located in front of the guide hole 3 opened at the center of the ruler is removed. The center bar 11 of the hole saw 7 is inserted into the guide hole 3 provided at the center of the ruler, and the hole saw 7 is not displaced by the center bar 11 and the guide hole 3.
The inner wall member 22 is cut into a circular shape by the cylindrical blade 14 of FIG. afterwards,
The center rod 11 of the hole saw 7 is inserted into the guide holes 3 on both sides, and two circular holes are opened on both sides of the circular hole opened at the center so that a part of the circular holes overlap with each other. The two circular holes open in order. At this time, hole saw 7
The center rod 11 is inserted and held in the guide hole 3 of the ruler and does not shift, so that three circular holes are opened at accurate positions. The three circular holes open box holes 23.

After opening the box hole 23, the ruler is removed from the box 4. The ruler shown in FIGS.
And remove the ruler from box 4. The ruler shown in FIG. 6 is pulled out of the box 4 by pulling the ruler. The ruler shown in FIG. 7 presses the base 1 against the pressing piece 19 as shown by the arrow A, shortens the total length, and connects the slit 17 to the box 4.
Of the box 4 and then detached from the box 4. The ruler you removed can be used many times. The ruler of the above embodiment has three guide holes 3 at the center and two sides on both sides, and the ruler of the present invention has three guide holes.
Not individually. The number of guide holes may be two or four or more.

[0026]

According to the present invention, the guide hole drilling ruler for the inner wall material is as follows.
There is a feature that a box hole can be opened at an accurate position of the inner wall material simply and easily and quickly and efficiently. that is,
The ruler of the present invention and a method of using the ruler are such that the center rod of the hole saw is inserted into the guide hole of the ruler connected to the box, and the center rod is held by the ruler so that the hole saw does not move. This is because a box hole can be opened by providing a circular hole in a predetermined hole of the material.

According to the method of the present invention for opening the box hole by preventing the hole saw from being displaced by the ruler, even if the inner wall material is made of gypsum board which is the easiest to cut, the method requires half the labor of a conventional knife. The feature is that a box hole can be opened in the inner wall material.

Furthermore, the method of the present invention and the ruler used in the method do not make holes in the wrong positions with a hole saw. For this reason, an extra position of the inner wall material is damaged, so that there is no need for repair or the like, and there is a feature that the box hole can be opened very efficiently as a whole.

[Brief description of the drawings]

FIG. 1 is a plan view of a ruler for drilling a box in an inner wall material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a box-piercing ruler of the inner wall material shown in FIG.

FIG. 3 is a perspective view showing a state in which the box hole ruler shown in FIG. 1 is attached to a box.

FIG. 4 is a sectional view showing a state in which a box hole is made in the inner wall material.

FIG. 5 is a front view showing a state in which a box hole is made in the inner wall material.

FIG. 6 is a sectional view of a box-piercing ruler having elastic claws according to another embodiment of the present invention.

FIG. 7 is a plan view of a box-piercing ruler having a slit according to another embodiment of the present invention.

FIG. 8 is a perspective view showing an example of a conventional detection plate with a magnet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Magnet 2a ... Center hole 3 ... Guide hole 4 ... Box 4a ... Projection part 5 ... Screw 6 ... Mounting hole 7 ... Hole saw 8 ... Cylindrical shaft 8a ... Slide hole 9 ... Grab 10 ... Bearing 10a ... Shaft hole 11 ... Center rod 12 ... Flange 13 ... Coil spring 14 ... Cylindrical blade 15 ... Screw hole 16 ... Elastic claw 16a ... Leg 17 ... Slit 18 ... Rod 19 ... Pressing piece 20 ... Coil spring 21 ... Column 22 ... Inner wall material 23 ... Box hole 24 ... Detection board 24

Claims (3)

[Claims] 1. A ruler removably connected to an opening of a box (4) fixed to a building, wherein a plurality of guide holes (3) for inserting a center rod (11) of a hole saw (7). The center rod (11) of the hole saw (7) is inserted into this guide hole (3), and the hole hole (23) is cut out of the inner wall material (22) with the hole saw (7). Box piercing ruler for inner wall material that is configured to open. 2. The ruler according to claim 1, wherein a magnet (2) having a center hole (2a) is fixed at the center of the ruler. 3. A step of connecting a ruler having a plurality of guide holes (3) to an opening of a box (4) fixed to a building; Interior wall material
(22) fixing step, searching the position of the box from the surface of the inner wall material (22), opening the box hole (23) near the box (4), and inserting a hole saw into the guide hole (3) of the ruler. Insert the center rod (11) of (7), center rod (11) and guide hole (3)
In the state in which the hole saw (7) does not shift, the step of opening a box hole (23) in the inner wall material (22) and the step of removing the ruler from the box (4) after opening the box hole (23) A method of making a box hole in the inner wall material using a ruler.