JP2001170924A - Drilling auxiliary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling auxiliary tool which can be used regardless of the size of a drill and ensures an easy drilling operation with high precision as is the case with the use of a general-purpose drill with a center pointed end of an edge, even when the drilling operation is performed using a diamond drill. SOLUTION: The drilling auxiliary tool 1 has a fixed seat 3 formed around a retaining part 2, the upper face of which is mildly dented toward the center of the retaining part 2 to form a conical face 2a. In addition, a peel hole 4 can be opened in the center of the retaining part 2 and an index 5 can be provided at the edge of the fixed seat 3 coinciding with a center line (a) orthogonal with the center of the retaining part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling assisting device for assisting drilling with a diamond drill, and more particularly, to a drilling tool for accurately cutting the edge of a diamond drill into a drilling position defined on an object to be drilled. This is related to assistive devices.

[0002]

2. Description of the Related Art Conventionally, as a drilling tool for drilling concrete members, stone materials, tiles, etc., a diamond grain having a grinding wheel segment containing diamond particles fixed to the lower end of a straight drill body from the lower surface to the side surface. A diamond drill (commonly known) in which a cutting edge forms a cutting edge of a drill has been put to practical use.

[0003]

Since the cutting edge of the diamond drill described above does not have a center point on the lower surface, the cutting edge jumps into the surface of the drilling object while the cutting edge cuts into the drilling object during drilling. Not only is the position not fixed,
The surface of the object to be drilled may be damaged.

Therefore, as shown in FIGS. 4 (a), 4 (b) and 4 (c), the method of drilling with a diamond drill is as follows.
At first, the drill body B is inclined with respect to the drilling object surface A so that the drill body B is cut into the drilling object surface A at the edge D of the cutting edge C, and then the drill body B is gradually raised. For example, a method of performing a perforated drilling by setting up (vertically) has been implemented.

As described above, when the drill body B is inclined and cut into the drilled object surface A at the edge portion D of the cutting edge C before drilling, the drilled object surface A is not damaged. Even so, the displacement of the drilling position is likely to occur, and the drilling accuracy is reduced. In addition, in order for a worker to carry out this method while holding the electric motor in his hand, the operator is forced to exert a considerable burden on the operation of the motor, the workability is poor, and the skill of the worker is also required. .

[0006]

According to the present invention, there is provided a drilling assisting tool provided with a fixing seat provided around a holding portion, and the upper surface of the holding portion is gently depressed toward the center to form a conical surface. It is characterized by having been formed.

Here, there is no particular limitation on the material of the auxiliary tool itself according to the present invention, and generally, a tool integrally formed of a synthetic resin material is used.

According to the drilling aid configured as described above, the auxiliary tool is fixed to the surface of the drilled object by aligning the center of the drill with the center of the holding portion at the drilling position defined on the drilled object. When the drill body is erected on the upper side and the edge of the cutting edge is made to entirely hit the conical surface, the cutting edge is located at the center of the conical surface. That is, the cutting edge of the drill can be positioned at the center of the holding portion by utilizing the centripetality of the conical surface. Therefore, when drilling is started in this state, the blade edge cuts through the center of the holding portion and cuts into the drilled object as it is. When cutting into the drilled object, the cutting edge of the drill is held by the hole drilled in the holding portion, so that it can be used regardless of the size of the drill. Unprecedented drilling is possible.

Further, a mark indicating the center point of the drilling is often provided on the surface of the drilled object prior to the drilling. Therefore, if a small peephole is provided at the center of the holding part, the two centers can be aligned by looking at the mark indicating the drilling center point on the surface of the object to be drilled from this peephole. And workability can be improved.

Also, depending on the object to be drilled,
It may be indicated by the intersection of orthogonal center lines drawn on the surface of the object to be drilled. Therefore, an index may be provided on the fixed seat edge in accordance with a center line orthogonal to the center of the holding portion. In this case, as an index, a center line orthogonal to the center of the holding part is hung from the holding part on the fixed seat, and the center line ends at the fixed seat edge or a cut end provided at the fixed seat edge at the end of the line. Can be missing. With this configuration, the auxiliary tool can be easily positioned by placing the auxiliary tool at the drilling position defined on the object to be drilled and adjusting the index of the fixed seat edge to the center line drawn on the surface of the object to be drilled. Therefore, also in this case, workability can be improved.

In the drilling using the auxiliary tool of the present invention, the drill bit is cut out of the holding portion and then cut into the object to be drilled to perform the drilling. Therefore, after drilling, the drill bit is cut into the holding portion. Is clear. However, as mentioned above,
By using the index provided on the fixed seat edge, the auxiliary tool can be positioned regardless of the presence or absence of a drilled hole or peep hole in the center of the holding part, so it can be used repeatedly for drilling the same size Also, when drilling a hole with a diameter larger than the hole diameter drilled in the holding part in the previous use, re-use the auxiliary tool, position the auxiliary tool using the index of the fixed seat edge, and drill can do. In this case, the cutting edge of the drill cuts through the holding portion in such a manner that the diameter of the previously drilled hole of the holding portion is enlarged, and the cutting edge of the drill is held by the newly drilled hole. Can be performed exactly as in the previous drilling. In this way, waste of resources can also be reduced by leaving the auxiliary tool in a single use and not disposable, and using it in stages from the small-diameter hole to the large-diameter hole.

In order to fix the assisting tool at the drilling position defined on the object to be drilled, it is possible to cut and fix a commercially available adhesive tape to an appropriate length. If the protective paper is temporarily attached with an adhesive surface, the protective paper is peeled off after positioning the auxiliary tool with respect to the surface of the drilled object, and the auxiliary tool can be fixed by pressing the fixing seat against the surface of the drilled object. In addition, the handling of the auxiliary tool is simplified, and the workability can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a part of an auxiliary tool according to an embodiment of the present invention in cross section, and FIG. 2 is a plan view of the auxiliary tool.

In FIGS. 1 and 2, the drilling assisting tool 1 has a fixed seat 3 provided around the holding portion 2. The holding portion 2 is slightly lifted from the fixed seat 3, and the upper surface of the holding portion is loosened toward the center. It is depressed to form a conical surface 2a. The assisting tool 1 of the embodiment is formed integrally with a synthetic resin material, has a viewing hole 4 at the center of the holding portion, and also allows the orthogonal center line a intersecting at the center of the holding portion to be fixed from the holding portion 2 to the fixing seat. Multiply by 3 and display
An index 5 is provided in a notch shape on the fixed seat edge along the end of the center line a. Further, an adhesive surface 6 is provided on the lower surface of the fixed seat 3, and a protective paper 7 is temporarily attached to the adhesive surface 6.

In the above configuration, the assisting tool 1 according to the present invention
The drilling operation using the method is as follows.

As shown in FIG. 3, first, at the piercing position determined on the object surface A to be pierced, the center of the piercing is adjusted to the center of the holding portion of the auxiliary tool 1, and the auxiliary tool 1 is attached to the object surface A to be pierced by the bonding surface 6. Fix it.

When the center of the hole to be drilled on the surface A of the object to be drilled is indicated by a mark on the surface A of the object to be drilled, the positioning of the auxiliary tool 1 is performed by using the mark 4 through the peephole 4 provided at the center of the holding portion. Look and position. When the center of the hole to be drilled on the object surface A to be drilled is indicated by the intersection of the orthogonal center lines drawn on the object surface A to be drilled, the positioning of the assisting tool 1 is performed with respect to the center line on the object surface A to be drilled. The index 5 provided on the edge of the fixed seat 3 is aligned, and positioning is performed so that both center lines overlap.

Next, the drill body B is erected on the holding part 2,
The cutting edge is positioned at the center of the conical surface such that the edge portion of the cutting edge entirely contacts the conical surface 2a. When drilling is started in this state, the cutting edge cuts through the holding portion 2 and cuts into the drilled object as it is. At the time of cutting into the object to be drilled, the cutting edge of the drill is held by the hole drilled in the holding portion 2, so that the cutting becomes a stable cut without wobble,
High precision drilling without displacement. Thus,
Drilling with a diamond drill can be easily and efficiently performed in the same manner as drilling with a general-purpose drill having a central point at the cutting edge.

[0020]

The present invention is embodied in the form as described above. According to the present invention, the center of the holding portion of the auxiliary tool fixed to the surface of the object to be drilled has the cutting edge of the drill at the center of the conical surface. , And drill a hole in the center of this holding part,
Since the drilling tool is used to hold the cutting edge of the drill with the drilled hole and cut the cutting edge into the object to be drilled, it can be used regardless of the size of the drill, and the drilling work using a diamond drill is With the same working procedure as when drilling with a general-purpose drill having a center point at the cutting edge, there is no displacement, etc., and highly accurate drilling can be performed efficiently and easily. In addition, the cutting edge of the drill does not jump to the surface of the drilled object to damage the surface of the drilled object. In addition, since the assisting tool can be used a plurality of times for drilling holes of the same size or holes of different sizes, waste of resources can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of a part of a drilling assisting tool according to an embodiment of the present invention.

FIG. 2 is a plan view of the assisting tool shown in FIG.

FIG. 3 is an explanatory view of a drilling procedure by a diamond drill using the auxiliary tool according to the present invention.

FIGS. 4 (a), (b), and (c) are diagrams for explaining a drilling procedure using a conventional diamond drill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling assisting tool 2 Holder 2a Conical surface 3 Fixed seat 4 Peephole 5 Index 6 Adhesive surface 7 Protective paper A Drilled object B Drill body C Cutting edge D Edge part

Claims (4)

[Claims] 1. A drilling assisting tool, wherein a fixing seat is provided around a holding portion, and an upper surface of the holding portion is gently depressed toward the center to form a conical surface. 2. The drilling assisting tool according to claim 1, wherein a viewing hole is provided at the center of the holding portion. 3. The drilling assisting tool according to claim 1, wherein an index is provided on the fixed seat edge in accordance with a center line orthogonal to the center of the holding portion. 4. The perforation assisting tool according to claim 1, wherein an adhesive surface is provided on a lower surface of the fixed seat, and a protective paper is temporarily attached thereto.