JP3188556B2 - Drill for metal fitting method and drilling method with the drill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting method drill for making a hole for inserting a projection of a plate-shaped metal fitting used in a metal fitting method, and a method for making a hole by the drill.

[0002]

2. Description of the Related Art There are various wooden frame construction methods.
One of them is the metal fitting method. This metal fitting method uses a square fitting A as shown in FIGS. 5 to 7 and a half-moon fitting B as shown in FIG. 8 (using other bolts and D pins). This is a method of joining wood members. The fitting A is provided with two projecting pieces 63 and 64 of a plate 60 having a U-shaped notch 61 and a circular hole 62,
Metal members 65 and 66 each having a shape as shown in the figure are welded. The metal fitting B is obtained by forming four circular holes 72 in a plate 70 having a concave portion 71.

[0003] Of such fittings A and B, the joining of a wood composite structure or the like using the fitting A is performed according to the procedure shown in FIGS. Here, a case where a girder is joined to a pillar is shown. First, in FIG.
The projections of the fitting A (members 65 and 66 and the projections 63 and 6)
After inserting 4) as far as it will go, the metal fitting A is hit downward with an appropriate tool and pressed down for positioning (see FIG. 10).

Then, as shown in FIG. 11, holes 91 and 92 corresponding to the notch 61 and the hole 62 of the metal fitting A, and a notch (not shown, formed at an end portion) through which the metal fitting A can be inserted. ) Is inserted into the hole 91 of the spar 90 formed in advance. Then, the spar 90 is dropped from above the metal fitting A until the D pin 93 engages with the base end of the notch 61 (see FIG. 12). Thereafter, a moderate downward pressure is applied to the spar 90 and D holes are formed in the hole 62 of the bracket A and the hole 92 of the spar 90.
The pin 94 is inserted, and the upper and lower D pins 93 and 94 are fixed with nuts (see FIG. 13).

By the way, in order to mount the bracket A, it is necessary to make holes 81 and 82 in the column 80, and the form of these holes is shown in a plan view in FIG. Here, a pair of holes 110 and 120 are formed in the wooden member 100. Each hole 11
Reference numerals 0 and 120 include cylindrical holes 111 and 121, slit-shaped openings 112 and 122, and U-shaped holes 113 and 123 located below the openings.

In order to form such holes 110 and 120, two kinds of drills and milling are generally used. That is, first, a cylindrical hole is formed by a twist drill (twist), and then a slit-shaped opening is formed from the cylindrical hole by a flat drill (flat). Subsequently, the side blade milling cutter is inserted into the cylindrical hole, and is moved laterally along the slit-shaped opening to form a U-shaped hole.

[0007]

As described above, in the case of drilling with two types of drills and milling cutters, a twist drill,
The three cutting tools must be replaced in the order of flat drill and side milling. In addition, in order to improve the accuracy of the holes, it is necessary not only to accurately position the tool with respect to the hole each time the tool is changed, but also to set the travel distance of the tool accurately for each tool. is there. For this reason,
A series of cutting operations such as tool exchange, tool positioning, and tool movement are time-consuming.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a means and a method for punching holes for metal fittings in a metal fitting method which can be performed easily and in a short time.

[0009]

The above object is achieved by the metal fitting drill of the present invention. That is, the drill of the present invention has a flat edge of the plate on one side edge of the plate.
Provide two protruding pieces extending in the same plane as the surface, and
Metal members extending in a plane perpendicular to the plane of the plate
In the metal fitting method for bonding wood member with a plate-like metal member fitted with projecting pieces and gold of the fittings
What is claimed is: 1. A drill for drilling a hole for inserting a metal member into a wooden member, comprising at least two grooves formed by a shank and at least two grooves engraved along the longitudinal direction and continuous with the shank. A main body having a cutting blade, and a tip end of the main body in a direction perpendicular to the longitudinal direction of the main body and
At least two blades provided so as to protrude outward from the main body, and the blades each have a right angle with a lower end surface thereof.
Directional cutting blades and the longitudinal cutting blades on each outer peripheral surface .

[0010] In the metal fitting method according to the present invention, the method for drilling a hole using a drill for a metal fitting method is a method of drilling a hole for inserting a protruding piece of the plate-shaped metal fitting and a metal member in a wooden member in the metal fitting method. First, apply the tip of the rotating drill to a predetermined position on the wooden member using the drill configured as described above, and insert the protruding piece of the bracket and the metal member.
After it pushed down to a predetermined depth that, then characterized as it is moved parallel by a predetermined distance laterally drill.

[0011]

Using the drill of the present invention, a hole for inserting the projections (metal members 65 and 66 and the protruding pieces 63 and 64) of the plate-shaped metal fitting (metal fitting A as shown in FIG. 5) used in the metal fitting method is formed. For example, referring to the hole 110 shown in FIG. 14, first, the tip of the drill, that is, the center of the cutter attached to the tip of the main body, is applied to the center where the cylindrical hole 111 is formed in the wooden member 100, and the drill is placed. Press down while rotating. Then, the wooden member is cut by the cutting edge on the lower end surface and the cutting edge on the outer peripheral surface of the blade. By pushing the drill to an appropriate depth, a cylindrical hole 111 having a diameter corresponding to the size of the blade is opened.

When the formation of the hole 111 is completed, the drill is translated in the lateral direction as it is. Then, the slit-shaped opening 112 is formed by the cutting edge of the main body, and the U-shaped hole 113 is opened by the cutting edge on the outer peripheral surface of the cutting tool. Of course, at this time, the bottom surface of the hole 113 is also cut by the cutting edge on the lower end surface of the blade. When the drill is moved laterally to an appropriate distance, the formation of the slit-shaped opening 112 and the U-shaped hole 113 is completed.

As described above, if the drill of the present invention is used,
There is no need to use three types of cutting tools (two types of drills and milling cutters) as in the past, and only one tool is required, eliminating the need for tool replacement and tool positioning. It can be performed easily and in a short time. Further, according to the drilling method of the present invention, since the drill having the above-mentioned characteristic configuration is used, after the drill is first accurately positioned at a predetermined position on the wooden member, the drill is moved downward and laterally. A hole 110 as shown in FIG. Therefore, troublesome operations such as tool exchange and tool positioning are not required, and the number of times of tool movement is reduced, and as described above, drilling operation can be performed easily and in a short time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a drill and a drilling method according to the present invention will be described based on embodiments. FIG. 1 is an overall view of a drill according to an embodiment, FIG. 2 is a bottom view of a cutting tool, FIG. 3 is a cross-sectional view of a main body, and FIG. 4 is an outer peripheral view of the cutting tool. The drill shown here comprises a shank 1, a body 2 connected to the shank 1,
The cutting tool 3 is provided at the tip of the main body 2 in a direction perpendicular to the longitudinal direction of the main body 2 and in a projecting manner. The shank 1 is a straight shank in this embodiment, and a neck 4 is provided between the shank 1 and the main body 2.

The main body 2 has two linear grooves 21 and 22 in its longitudinal direction, and two linear cutting blades 23 and 24 are formed along the grooves 21 and 22, respectively. (See FIG. 3). Also, near the cutting blades 23 and 24, there are formed slight linear concave portions 25 and 26, respectively, which are for reducing friction. In this embodiment, as shown in FIG. 2, the blade 3 is composed of two blades 3a and 3b each having a shape as shown in FIG.
a and 3b are provided at symmetrical positions of 180 degrees with respect to the central axis of the main body 2. Cutting blades 31 and 32 are formed on the lower end surfaces of the blades 3a and 3b, respectively, on the forward rotation (arrow direction) side. In FIG. 4, the cutting blades 33, 3b are disposed on the outer peripheral surfaces of the blades 3a, 3b on the side of the forward rotation (in the direction of the arrow).
34 are formed respectively. Cutting edge 31, 3 on lower end face
2 is raised from the lower end face, this is because the blades 3a, 3
It is formed by diagonally cutting the lower end face of b (see FIG. 4).

The diameter of the main body 2 is determined by a hole 110 (a metal member 65, 66 and a protruding piece 63, 64) of a plate-shaped metal fitting (metal fitting A as shown in FIG. 5) used in the metal fitting method. 14) (see FIG. 14).
Has a dimension corresponding to the width of The diameter of the entire blade 3 including the blades 3a and 3b is a size corresponding to the diameter of the cylindrical hole 111, and the thickness of the blade 3 is a size corresponding to the height of the U-shaped hole 113. .

Such a drill is used, for example, by attaching it to a drilling machine. Here, the drill shown in FIG.
4, that is, according to the drilling method of the present invention, first, a cylindrical hole 111 is formed in the wooden member 100.
The tip of the drill, that is, the center of the blade 3 is brought into contact with the center of forming the drill, and the drill is pressed down while rotating. This allows
The wood member 100 is cut into a circular shape by the cutting blades 31 and 32 on the lower end surfaces of the blades 3a and 3b and the cutting blades 33 and 34 on the outer peripheral surface. When the drill is pushed to a depth where the protrusion of the metal fitting A can be completely inserted, a cylindrical hole 111 having a predetermined diameter is formed.

When the formation of the hole 111 is completed, the drill is translated in the horizontal direction. Thereby, the slit-shaped opening 112 is formed by the cutting blades 23 and 24 of the main body 2.
Is formed. At the same time, a U-shaped hole 113 is opened by the cutting edges 33, 34 on the outer peripheral surfaces of the blades 3a, 3b, and the bottom surface of the hole 113 is also cut by the cutting edges 31, 32 on the lower end surfaces of the blades 3a, 3b. Then, if the drill is laterally moved to a distance enough to slide the metal fitting A, a slit-shaped opening 112 having a predetermined width and length and a U-shaped hole 113 having a predetermined width and height are formed. Ends.

The present invention is, of course, not limited to the drill shown in the above embodiment. For example, in the above-described embodiment, two linear grooves 21 and 22 are formed in the main body 2, but three or more grooves may be formed and three or more linear cutting blades may be formed. Alternatively, two or more spiral grooves may be formed, and two or more spiral cutting blades may be formed. However, in the case where three or more grooves are formed, the number of the grooves is preferably 3 to 4 in consideration of cutting ability and the like, regardless of whether the grooves are linear or spiral.

Also, the blade 3 attached to the tip of the main body 2
There is no need to use three blades 3a and 3b, and three or more blades may be used. However, also in this case, about 4 to 15 sheets is appropriate from the viewpoint of cutting ability and the like.

[0021]

As described above, the metal-fitting drill according to the present invention comprises a main body having at least two cutting edges formed by at least two grooves, and at least two cutting edges attached to the tip of the main body. A plate-shaped metal fitting having two protruding pieces and a metal member , since the cutting tool has a cutting edge in a direction perpendicular to each lower end surface and a cutting edge in a longitudinal direction on each outer peripheral surface. In the metal fitting method of joining wooden members using the method described above, it is possible to make a hole for inserting a metal piece and a protruding piece of a metal fitting with this single drill.

Therefore, it is not necessary to use three types of cutting tools as in the conventional case, and there is no need to replace the tool or to position the tool with the replacement. It can be carried out. In addition, since the hole drilling method of the present invention drills a hole for inserting a protruding piece of a metal fitting and a metal member using the drill for metal fitting method, there is no need for troublesome work such as tool replacement or tool positioning. The number of movements of the tool is reduced as compared with the related art, and the drilling operation can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire drill according to one embodiment.

FIG. 2 is a bottom view of the cutting tool of the drill shown in FIG. 1;

FIG. 3 is a cross-sectional view of the main body of the drill shown in FIG. 1;

FIG. 4 is an outer peripheral view of a blade of the drill shown in FIG. 1;

FIG. 5 is a perspective view of a metal fitting used for a metal fitting method.

FIG. 6 is a front view of the metal fitting shown in FIG. 5;

FIG. 7 is a side view of the metal fitting shown in FIG. 5;

FIG. 8 is a perspective view of another metal fitting used for the metal fitting method.

FIG. 9 is a view for explaining a method of joining wooden members using the metal fittings shown in FIG. 5;

FIG. 10 is an explanatory view following FIG. 9;

FIG. 11 is an explanatory view following FIG. 10;

FIG. 12 is an explanatory view following FIG. 11;

FIG. 13 is an explanatory view following FIG. 12;

FIG. 14 is a plan view for explaining a shape of a hole into which a protrusion of the metal fitting shown in FIG. 5 is inserted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shank 2 Main body 3, 3a, 3b Cutting tool 21, 22 Groove 23, 24 Cutting blade 31, 32 Cutting blade 33, 34 Cutting blade

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) B27G 15/00 B27G 13/14 B27F 1/08 B27F 1/00

Claims (2)

(57) [Claims] 1. A flat surface of a plate on one side edge of the plate.
Providing two protruding pieces extending in the same plane,
Metal parts that extend in a plane perpendicular to the plane of the
In a metal fitting method for joining wooden members using a plate-shaped metal fitting attached thereto, a protrusion and a metal part of the metal fitting are provided.
What is claimed is: 1. A drill for drilling a hole in a wooden member for inserting a material , comprising: a shank; and at least two cuts formed by at least two grooves continuous with the shank and formed along a longitudinal direction. A main body having a blade, at least two of which are attached to the tip of the main body in a direction perpendicular to the longitudinal direction of the main body and protruding outward from the main body.
A plurality of blades, each of the blades having the right-angled cutting blade at the lower end surface thereof,
A drill for a metal fitting method , comprising the longitudinal cutting edge on each outer peripheral surface . 2. A plate having a flat surface on one side edge thereof.
Providing two protruding pieces extending in the same plane,
Metal parts that extend in a plane perpendicular to the plane of the
In a metal fitting method for joining wooden members using a plate-shaped metal fitting attached thereto, a protrusion and a metal part of the metal fitting are provided.
A method of drilling a hole in a wooden member for inserting a material , comprising: a shank; and at least two cutting blades each formed by at least two grooves engraved along the longitudinal direction and continuous with the shank. A main body having at least two protruding portions attached to the tip of the main body in a direction perpendicular to the longitudinal direction of the main body and outward from the main body.
A plurality of blades , wherein each of the blades has a cutting edge in a direction perpendicular to the lower surface thereof,
Using a drill having the longitudinal cutting edge on the outer peripheral surface , first hit the tip of the rotating drill to a predetermined position of the wood member, after pushing down to the depth that can insert the protruding piece and metal member of the metal fittings , then A drilling method using a drill for a metal fitting method, wherein the drill is translated in a horizontal direction by a predetermined distance.