JPH1094909A - Drilling blade mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change a drilling blade by holding the same between a vis head of a vis screwed in an internal thread screwed on a an outer face of one side wall of a rotor or a fixed body, and a side wall. SOLUTION: A vertical recessed groove 3b having a notch 3a at an upper edge, is formed on an outer face of a side wall outside of an integral fixed body 3 having a shape of box, and an upper part of a drilling blade 4 is held by the recessed groove 3b. Further the internal threads 3c are screwed at both sides of the recessed groove 3b, and the blade 4 is held between a screw head of a screw 3e screwed in the internal thread 3c, and a side wall of the fixed body 3. The fixed body 3 is energized in the direction separating from a rotor 5 at all times, and the fixed body 3 itself can be easily removed by releasing the fixing by loosening the vis 3e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a boring blade mounted on a boring tool.
The present invention relates to the provision of a mounting structure for a drilling blade that can easily and safely perform the mounting and dismounting operation of the drilling blade.

[0002]

2. Description of the Related Art Conventionally, as a method of mounting a drilling blade to be mounted on a drilling tool used for drilling a through-hole in a body to be drilled, FIG. 7 is an exploded perspective view showing a main part thereof. ,
A piercing blade mounting seat 32 having a threaded female screw 31 is provided at both ends of the arm 33, and the piercing blade mounting seat 32 is provided.
The through hole 3 formed in the female screw 31 and the drilling blade 34
The perforation blades 34 are arranged so that 5 overlap with each other, and are fastened and fixed via screws 36 and the like provided through the through holes 35.

[0003]

However, in the conventional method for mounting a drilling blade, the drilling blade 33 can be fixed to the drilling blade mounting seat 32, but a through hole is formed in the body to be drilled. During this operation, the drilling blade 33 may rotate or rotate around the screw 36 or the like, and as a result, it may not be possible to form a beautifully finished through hole.

A female screw 3 is attached to the drilling blade mounting seat 32.
The operation of arranging the drilling blade 34 so that the hole 1 and the through hole 35 formed in the drilling blade 34 overlap with each other and then tightening and fixing the through hole 35 with a screw 36 and the like provided therethrough is very troublesome. Since the length from the through hole 35 to the tip of the drilling blade 34 could not be freely adjusted,
Many types of drilling blades were prepared in advance, and the work of selecting and replacing the drilling blades for each of the drilled objects having different thicknesses had to be performed.

[0005] In particular, in the case of a piercing tool having a swarf receiving cover body, since the piercing blade must be attached and detached in a narrow portion of the cover body, it is inconvenient to exchange the piercing blade, it takes time to exchange, and the hand and fingers are also required. Injuries often occur, and improvements have been desired.

Accordingly, an object of the present invention is to create and provide a mounting structure for a drilling blade capable of easily and safely mounting and removing the drilling blade.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention of claim 1 for solving the above problem is that a piercing tool 20 used for the purpose of piercing a through hole in a body to be pierced.
Mounting structure 3 for a drilling blade 4 mounted on a
A female screw 3c is threaded on the outer surface of one side wall of the rotating body 5 or the fixed body 3 for holding the hole. The piercing blade 4 is inserted between the screw head of the screw 3e screwed to the female screw 3c and the side wall. A drilling blade mounting structure 3 characterized in that it is pinched;
In the replacement operation of the drilling blade, it is not necessary to remove and replace the entire screw from the drilling blade each time. That is, it is possible to improve the workability of exchanging the drilling blade.

The gist of the invention of claim 2 is that the rotating body 5 or the fixed body 3 is housed inside a cover body 7 which can prevent chips from being scattered by the drilling blade 4. According to the first aspect of the present invention, in addition to the function of the first aspect of the present invention, in particular, the operation of attaching and detaching the perforation blade can be easily and safely performed even in a narrow place in the cover body.

The gist of the third aspect of the present invention is that the cover 7 has an opening 7a on the side thereof, and the screw 3e can be operated from outside the opening 7a. In the drilling blade mounting structure according to the second aspect, in addition to the function of the invention according to the first or second aspect, in particular,
For example, unlike such a conventional piercing tool, unlike a case where an L-shaped hexagon wrench is inserted from an opening below a cover body to operate a screw, the screw 3e is stopped only from the outside of the opening 7a with a screwdriver. And the like, and the size of the entire cover body can be reduced. That is, the work of attaching and detaching the drilling blade can be performed quickly and safely.

The gist of the invention of claim 4 is that in the mounting structure of the drilling blade, a vertical groove 3b capable of accommodating the drilling blade 4 is provided on the outer surface of the side wall of the rotating body 5 or the fixed body 3. 2. The semiconductor device according to claim 1, wherein:
In addition to the function of the invention according to any one of claims 1 to 3, in addition to the function of the invention according to any one of claims 1 to 3, in particular, the vertical direction formed on the outer surface of the side wall of the rotating body 5 or the fixed body 3 Part of the drilling blade 4 can be accommodated in the concave groove 3b, and rotation or rotation of the drilling blade 4 itself can be prevented. That is, a beautifully finished through hole can be formed in the body to be drilled.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an embodiment in which a mounting structure of a boring blade is embodied. FIG. 1 shows a piercing tool 20 having a mounting structure for a piercing blade 4 according to an embodiment of the present invention.
2 is a partially broken side view of FIG. 2A, FIG. 3A is a front view of a rotating body 5 that rotates integrally with the rotating shaft 1, and FIG. FIG. 4
FIG. 4A is a plan view of a fixed body of the boring blade according to the present embodiment, and FIG. 4B is a front view of the same.

In FIG. 1, a piercing device 20 according to an embodiment of the present invention is shown.
Is used when drilling a through-hole in the body to be drilled, the tip is detachably attached to a hand-held rotary drive tool, and a rotary shaft 1 that is driven to rotate by the rotary drive tool; A center shaft 2 having one end detachably secured to the rotating shaft 1 and providing a center of a through hole 10 to be drilled in the body to be drilled; and a center concentric with the center of the hole of the through hole 10. A through-hole 5a is formed, and the lower part of the rotary shaft 1 is removably inserted into the center through-hole 5a, and the fixed body 3 is provided on opposite sides separated from the center through-hole 5a by a predetermined distance. A main body block 6 including a rotating body 5 to which a perforation blade 4 is attached; a cup-shaped leg 7b having an opening 7a provided in a side wall surface to cover the entire rotating body 5; and an integrally formed upper part of the leg 7b. A cylindrical portion 7c provided with an insertion hole through which the rotary shaft 1 is inserted A cover member 7 detachably engaged with the opening 7a and covering the entire opening 7a with a cover member 7d; and a moving distance of the main body block 6 fixed to the upper surface of the cover body 7. And a cutting depth adjusting device 8 for limiting the cutting depth.

The rotating body 5 has a central through hole 5a formed concentrically with the center of the through hole 10 formed in the body to be drilled, and the inner surface of the central through hole 5a is notched in the axial direction. A concave portion is formed, and a convex portion formed on the lower outer surface of the rotary shaft 1 is pivotally supported in this concave portion so that the concave portion can be removably inserted into the concave portion and can be fixed in a state where the rotation is stopped. ing.

As shown in FIG. 5, each of the rotating members 5 is formed in a nut shape at a position on the radiation passing through the center shaft 2 and having a center of symmetry about the axis of the center shaft 2. A female screw 5b is formed, and the fixed body 3 of the drilling blade 4 arranged in the projecting direction can be screwed to the female screw 5b via a screw 5c.

As shown in FIG. 6, the mounting structure of the perforating blade 4 includes a vertical groove 3 having a notch 3a at an upper end on an outer side wall of a fixed body 3 integrally formed in a substantially housing shape.
b is formed, and the upper part of the boring blade 4 is held in the concave groove 3b. Further, female screws 3c are threaded on both sides of the concave groove 3b, and the boring blade 4 is held between the screw head of the screw 3e screwed to the female screw 3c and the side wall of the fixed body 3. It has become.

As shown in FIG. 4A, a long hole 3d is formed in the center of the bottom surface of the fixed body 3 in a direction perpendicular to the side wall provided with the piercing blade 4. 3d long hole
The fixed body 3 itself can be slid to a desired position in the radial direction of the center shaft 2 by loosening the screw 5c provided through the screw 5c.
It can be tightened and fixed. That is, since the distance between the center shaft 2 and the fixed body 3 can be set in a stepless manner, it functions so that various perforations 10 having different perforation diameters can be perforated in the perforated body.

The piercing blade 4 has a V-shaped cutting edge and is formed in a shape inclined from the outside to the inside in the blade thickness direction, and has an engagement protruding in the width direction at the upper end. Part 4
a, which cannot be attached unless the engaging portion 4a is engaged with the notch 3a of the fixed body 3. That is, the drilling blade can be mounted only in the positioned state.

In addition, a coil spring (elastic body) is interposed between the rotating body 5 and the boring blade 4 against the elastic force of the spring.
Is fixed to the rotating body 5, the fixed body 3 is always urged in the direction away from the rotating body 5, and the fixed body 3 is released by loosening the screws to release the fixed body 3. It can be easily removed. That is,
In particular, in the case of a piercing tool having the chip body cover 7, it is not necessary to replace the piercing blade 4 in a narrow area inside the cover body 7, and therefore, the mounting of the piercing blade 4 without injury to the fingers. , Removal and replacement work can be performed safely.

When replacing the drilling blade, the opening 7a can be easily opened by removing the cover 7b provided on the cover body 7. For example, such a conventional drilling tool is used. Unlike the case where the screw is operated by inserting an L-shaped hexagon wrench or the like from the opening below the cover body, similarly to the above, from outside the opening 7a, through the opening 7a, only the screwdriver is used. Screw 3e
Since operations such as stopping can be performed, the work of replacing the drilling blade can be performed quickly and safely, and the size of the entire cover body can be reduced.

Incidentally, the drilling blade mounting structure of the present invention comprises:
A vertical groove 3b is formed on the outer surface of the side wall on the outer side of the fixed body 3. The groove 3b holds the upper part of the piercing blade 4 in the groove 3b and is screwed to the female screw 3c threaded on both sides of the groove 3b. Between the screw head of the screw 3e and the side wall of the fixed body 3,
There is a feature in that the drilling blade 4 is sandwiched and that each of the drilling blades held by the fixed body is drawn so as to draw the same circular locus about the center axis.

Therefore, the present invention is not limited to the above-described embodiment, and may be appropriately designed without departing from the spirit of the present invention, for example, by forming the above-described mounting structure of the drilling blade 4 on the outer surface of the side wall of the rotating body 5. What can be changed and implemented
Needless to say repeatedly.

[0022]

As described above, according to the drilling blade mounting structure of the present invention, a female screw is threaded on the outer surface of one side wall of the rotating body or the fixed body, and the drilling blade is screwed to the female screw. Since the drilling blade is sandwiched between the screw head of the screw and the side wall, the replacement of the drilling blade can be easily performed by loosening the screw. That is, it is not necessary to remove and replace the entire screw from the drilling blade each time the drilling place is replaced, thereby improving workability.

According to the drilling blade mounting structure of the present invention, in particular, when the drilling tool is provided with a cover body which can prevent scattering of chips, the drilling blade can be narrow even in the cover body. Can be easily and safely installed and removed.

According to the drilling blade mounting structure of the third aspect of the present invention, in particular, unlike the conventional drilling tool, the operation of the screw is performed by removing the cover body and then using a hexagon wrench or the like. The operation of the screw can be performed only from the outside of the opening with the drawer bar. That is, the work of attaching and detaching the drilling blade can be performed extremely quickly and safely.

Further, according to the drilling blade mounting structure of the present invention, a part of the drilling blade is fixed in a vertically concave groove formed on the outer surface of the side wall of the rotating body or the fixed body. Therefore, rotation or rotation of the perforation blade itself can be reliably prevented. That is, since each of the drilling blades held by the rotating body or the fixed body can be fixed so as to draw the same circular locus around the center axis, a beautifully finished through-hole can be quickly and accurately formed on the drilled body. Can be drilled.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a piercing tool provided with a piercing blade mounting structure according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the piercing device of FIG. 1;

FIG. 3A is a front view of a rotating body that rotates integrally with a rotating shaft, and FIG. 3B is a bottom view of the rotating body.

FIG. 4A is a plan view of a fixed body of the drilling blade of the present embodiment, and FIG. 4B is a front view of the same.

FIG. 5 is an exploded front view of a main part for describing a method of attaching a fixed body to a rotating body.

FIG. 6 is an exploded perspective view of a main part for describing a method of attaching a perforation blade to a fixed body.

FIG. 7 is an exploded perspective view of a main part for describing a conventional method of attaching a drilling blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... Center shaft 3 ... Fixed body 3a ... Notch 3b ... Concave groove 3c ... Female screw 3d ... Long hole 3e ... Screw 4 ... Drilling blade 4a ... Engagement part 5 ... Rotating body 5a ... Center through hole 5b ... female screw 5c ... screw 6 ... body block 7 ... cover body 7a ... opening 7b ... cup-shaped leg 7c ... cylindrical part 7d ... lid member 8 ... cutting depth adjusting device 10 ... through hole 20 ... punching tool 31 ... Female screw 32 ... Punching blade mounting seat 33 ... Arm 34 ... Punching blade 35 ... Through hole 36 ... Screw

Claims (4)

[Claims] 1. A mounting structure for a drilling blade mounted on a drilling tool used for drilling a through-hole in a drilled body, wherein an outer surface of one side wall of a rotating body or a fixed body for holding the drilling blade. A female screw is screwed into the female screw, and the drill blade is held between the screw head of the screw screwed to the female screw and the side wall. 2. The drilling blade mounting structure according to claim 1, wherein the rotating body or the fixed body is housed inside a cover body that can prevent chips from being scattered by the drilling blade. 3. The perforated blade mounting structure according to claim 2, wherein the cover has an opening on a side thereof, and the screw can be operated from outside the opening. 4. The mounting structure of the drilling blade, wherein a vertical groove capable of accommodating the drilling blade is formed on an outer surface of a side wall of the rotating body or the fixed body. The perforation blade mounting structure according to any one of the above.