JPH09187813A - Cutting rotary tool edge around anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a self leveling material stuck around an anchor bolt by a method wherein a plurality of pieces of projecting tool edges directing the tool edge to an inside of a fitting hole by extending in a direction of the inside are provided at equal angles to a bottom end face of a cylindrical rotary body having the fitting hole in which the anchor bolt can be freely vertically movably fitted. SOLUTION: When a convex edge 5 is pushed on a swollen part 16a of a self leveling material 16 while a cylindrical rotary body 4 is rotated by starting a rotating machine, tool edges 5a, 5b of the projecting edge 5 can gradually cut off the swollen part from near its upper end. Almost powder scrap of the self leveling material 16 generated in that case is scattered outside the cylinderical rotary body 4 by centrifugal force following rotation of an output shaft, and that remaining near around an anchor bolt 2 stays inside a step part 6. Further, when the convex edge 5 is continuously pushed on the swollen part 16a, the projecting edge 5 reaches a top end 15a, and the swollen part 16a can be completely removed thereby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used by being attached to an output shaft of a rotating machine, and is used to scrape off a self-leveling material or the like adhering to the periphery of an anchor bolt and to cut a rotary blade around the anchor bolt. Regarding

[0002]

2. Description of the Related Art As shown in FIG. 6, in order to form a cloth foundation 15 of a building, concrete 20 is placed between molds (not shown), and when the concrete 20 is hardened to some extent, water is added to the water. The self-leveling material 16 obtained by kneading with a small amount of cement powder is poured into the self-leveling material 16
It is well known to wait for the layers of to completely cure.

Thus, the top 20 of the concrete 20
The reason why the layer of the self-leveling material 16 is formed so as to cover a is to omit the step of finishing the top end 15a of the cloth foundation 15 which becomes a reference surface when positioning the wall panel, the floor panel or the like to be flat. That is, the self-leveling material 16 is a liquid having excellent fluidity before being hardened, and the top 20a of the concrete 20 cast between the molds has irregularities or the top 20a is inclined. However, since the surface becomes a horizontal surface, when hardened, the top end 15a of the cloth foundation 15
Automatically finishes on a horizontal surface.

[0004]

However, since the surface tension of the self-leveling material 16 is as high as that of water, the anchor bolt 2 that rises from the top end 15a of the cloth foundation 15 is used.
If it comes into contact with the peripheral surface of the anchor bolt 2, it will adhere and rise along the peripheral surface of the anchor bolt 2. On the other hand, on the cloth foundation 15, the frame assembly 19 is built by welding the end plate 18 having the bolt insertion hole 18a through which the anchor bolt 2 is inserted to the lower end of the lightweight lip grooved steel 21. When the raised portion 16a of the leveling material 16 is hardened, the raised portion 16a lifts the entire shaft assembly 19 to form a gap between the shaft assembly 19 and the top end 15a of the cloth foundation 15. At this time, the raised portion 16a can be crushed to some extent by fastening the end plate 18 of the shaft assembly 19 to the anchor bolt 2 with the nut 22 that is screwed from above, but the shaft assembly 19 can be completely brought into contact with the top end 15a. Does not reach. In this state, when a wall panel, a floor panel or the like is attached to the frame assembly 19, the raised portion 16a is further crushed by the load, and the entire frame assembly 19 descends, and the wall panel, the floor panel or the like is displaced. Cause.

Therefore, before the frame 19 is built on the cloth foundation 15, the raised portion 1 of the self-leveling material 16 is
6a is removed by shaving using a flat-blade screwdriver instead of the scraper, or by lightly hitting with a hammer and crushing it. Normally, if the cloth foundation 15 for a house is taken as an example, one unit Since the number of anchor bolts 2 to be planted per hit reaches 70 or more,
There is a problem that it takes a considerably long time to remove the raised portion 16a.

An object of the present invention is to solve the above problems, and to provide a shaving rotary blade around an anchor bolt which can quickly and easily scrape off self-leveling material and the like attached to the periphery of the anchor bolt. Is.

[0007]

A shaving rotary blade around an anchor bolt according to claim 1, wherein a lower end surface of a cylindrical rotary member having a fitting hole into which the anchor bolt is vertically movably fitted,
Providing a plurality of convex blades extending in the radial direction and directing the cutting edge toward the inside of the fitting hole at equal angles, and at the upper end of the cylindrical rotating body, a handle for connecting to the output shaft of the rotating machine is provided. It is characterized by that.

A shaving rotary blade around an anchor bolt according to a second aspect of the invention is one in which a lower end opening of the fitting hole is expanded to form a step portion, and the convex blade is projected inward of the step portion. .

In the shaving rotary blade around the anchor bolt according to a third aspect of the present invention, a turning handle protruding from the peripheral side surface of the cylindrical rotary member is detachably attached near the upper end thereof.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A shaving rotary blade around an anchor bolt according to an embodiment of the present invention will be described. The same components as those of the conventional technique are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 to 3, a shaving rotary blade 1 around an anchor bolt according to the present embodiment has a tubular rotating body 4 having a fitting hole 3 into which an anchor bolt 2 can be vertically movably fitted. A plurality of convex blades 5 extending in the radial direction of the lower end surface 4 a of the blade 5 a for directing the blade tip 5 a inward of the fitting hole 3 are provided.
It is provided at intervals of 20 degrees, and the lower end surface 4 of the cylindrical rotating body 4 is further provided.
A stepped portion 6 for enlarging the diameter of the fitting hole 3 is formed in a, and an upper end portion 4b of the cylindrical rotating body 4 has three claws on an output shaft 7a of a rotating machine 7 including, for example, a rechargeable rotary tool. It is provided with a handle 9 which is connected via a chuck 8.

The cylindrical rotary member 4 is shown in FIG.
As shown in FIG. 3 showing a cross section, the fitting hole 3, the stepped portion 6 and the handle 9 are respectively formed by machining a round bar made of steel, and the entire surface is plated with chrome. .

Specifically, the fitting hole 3 is formed by digging with a drilling machine or a lathe to a depth dimension such that the entire portion of the anchor bolt 2 protruding from the top end 15a of the cloth foundation 15 can be fitted therein. The inner diameter of the fitting hole 3 is set to be slightly wider than the outer diameter of the anchor bolt 2. For example,
If the standard of the anchor bolt 2 is M14, the inner diameter of the insertion hole 3 is set to 13.9 mm in consideration of the manufacturing control tolerance of the anchor bolt 2, so that the anchor bolt 2 and the insertion hole 3 are separated from each other. I try to minimize the gap. The stepped portion 6 further engraves the lower end surface 4a of the cylindrical rotating body 4 in a wider range of 1 to 5 mm than the inner diameter of the fitting hole 3 at a depth of 1 to 10 mm when forming the fitting hole 3. The lower end opening 3a of the fitting hole 3 is expanded by being inserted. The handle 9 is a shaft formed by cutting the peripheral side surface of the upper end portion 4b of the tubular rotating body 4 with a lathe or the like.

The convex blade 5 is composed of a rectangular tip whose tip and lower end are blade tips 5a and 5b, respectively, and the lower end surface 4a of the cylindrical rotary member 4 is radially arranged at intervals of 120 degrees at intervals of 3 degrees.
Three recessed portions 1 formed by cutting with a width of about mm
Soldered inside 0. The cutting edge 5a of the stepped portion 6 is formed so as to rotate in a circular orbit having the same axis as the insertion hole 3 and a diameter (13.9 mm according to the above example) equivalent to the inner diameter of the insertion hole 3. Projected inward by a certain size. The cutting edge 5b protrudes from the lower end surface 4a of the cylindrical rotating body 4 by about 1.5 mm. This is because it is considered that the convex blade 5 can be easily positioned by a jig or the like when the convex blade 5 is brazed to the cylindrical rotating body 4, but the blade tip 5b and the lower end surface 4a are formed into a surface. May be one.

In the vicinity of the upper end portion 4b of the cylindrical rotary member 4, as shown in FIG. 4 and FIG. 5 showing a BB cross section thereof, a hand-turning handle 11 made of a steel round bar with a head is provided. Can be detachably attached. More specifically, a reduced diameter portion 11a is formed in the center of the hand-held steering wheel 11 in the longitudinal direction, and the tubular rotating body 4 has a handle mounting hole 12 opened on both sides and a screw hole 1 orthogonal to the handle mounting hole 12.
3 is formed, and a tightening screw 14 is screwed into the screw hole 13. The handwheel 11 can be attached to the tubular rotating body 4 by inserting the handwheel 11 into the handle mounting hole 12 and engaging the tip of the tightening screw 14 with the reduced diameter portion 11a. vice versa,
To remove the handwheel handle 11, simply loosen the tightening screw 14 and pull the handwheel handle 11 out of the handle mounting hole 12.

Next, a procedure for using the shaving rotary blade 1 around the anchor bolt according to the embodiment of the present invention will be described. First, as shown in FIGS. 1 and 3, the handle 9 is connected to the output shaft 7a of the rotating machine 7. Then, the anchor bolt 2 protruding from the top end 15a of the cloth foundation 15 is fitted into the fitting hole 3 of the tubular rotary body 4. In this process, while starting the rotating machine 7 to rotate the cylindrical rotating body 4,
When the convex blade 5 is pressed against the raised portion 16a of the self-leveling material 16, the cutting edges 5a and 5b of the convex blade 5 can gradually cut off the raised portion 16a from the vicinity of its upper end.

At this time, most of the dust particles of the self-leveling material 16 generated when the raised portion 16a is cut off are scattered to the outside of the cylindrical rotary member 4 by the centrifugal force accompanying the rotation of the output shaft 7a, and the anchor bolt. What remains near the periphery of 2 stays in the stepped portion 6. Further, since the output shaft 7a rotates at a high speed, the handwheel handle 11 is attached to the cylindrical rotary member 4
If it is attached to the handwheel, there is a risk that the handwheel handle 11 may suddenly collide with the operator's hand, so it is safe to remove the handwheel handle 11 before starting the rotating machine 7 in order to ensure safety. Is preferred.

Further, when the convex blade 5 is continuously pressed against the raised portion 16a, the convex blade 5 reaches the top end 15a, whereby the raised portion 16a can be completely cut off. Then, when the rotary machine 7 is stopped at an appropriate time when the raised portion 16a is completely cut off, the work is completed.

At this time, the time point when the raised portion 16a is completely cut off cannot be accurately estimated, and the convex blade 5 becomes the top end 15a.
When the rotating shaft 7a continues to rotate even after reaching, the blade edge 5b of the convex blade 5 projects about 1.5 mm from the lower end surface 4a of the cylindrical rotating body 4, so that the phantom line in FIG. Top 15a
The recess 17 is dug into the recess 17. However, such a recess 17 corresponds only to a position right below the bolt insertion hole 18a of the end plate 18 described in the prior art, and the lower surface of the end plate 18 is substantially entirely covered with the recess 17. Outer crown 15
Since it is received by a, it has no influence on the positioning of the shaft assembly 19 on the top end 15a.

Incidentally, in order to prevent the recess 17 from being dug in the top end 15a inadvertently, the cutting edge 5b of the convex blade 5 may be flush with the lower end surface 4a of the cylindrical rotary member 4. In this case, if the inner diameter of the stepped portion 6 is made larger than the diameter of the raised portion 16a, the raised portion 16a can be completely cut off at the portion of the convex blade 5 protruding inward of the stepped portion 6.

When the raised portion 16a is cut off without using the rotating machine 7, a manual handle 11 is attached to the cylindrical rotating body 4, and then the cylindrical rotating body 4 is attached.
In the process of inserting the anchor bolt 2 projecting from the top end 15a into the insertion hole 3 of No. 3, when the manual handle 11 is gripped and the cylindrical rotary member 4 is rotated, the convex blade 5 is pressed against the raised portion 16a, The raised portion 16a can be completely cut off as described above.

[0022]

According to the shaving rotary blade around the anchor bolt according to claim 1 of the present invention, the circumference of the anchor bolt in which the self-leveling material forming the upper layer of the cloth foundation or the like is implanted into the cloth foundation or the like by surface tension. If a bulge occurs when it adheres to the surface, insert the anchor bolt inside the tubular rotating body as described above, and rotate the tubular rotating body as a whole in the circumferential direction by the rotating machine to rotate the tubular rotating body. By pressing the convex blade provided on the lower end surface of the body against the raised portion, the raised portion can be easily cut off. Therefore, even when there are a large number of anchor bolts implanted in the cloth foundation or the like, it is possible to easily remove the raised portion generated for each of the anchor bolts in a short time. Moreover, foreign matter and dust attached to the periphery of the anchor bolt can be removed at the same time.

According to the shaving rotary blade around the anchor bolt of the second aspect, since the lower end opening of the fitting hole is expanded in diameter to form the step portion, it occurs when the raised portion is cut off by the convex blade. The dust particles of the self-leveling material can be released into the stepped portion from between the lower end surface of the tubular rotating body and the top end of the cloth foundation. As a result, it is possible to prevent dust and debris from being caught between the tubular rotating body and the top end surface of the cloth foundation, and to reduce the resistance when the tubular rotating body rotates. Further, since the convex blade projects inward of the step portion, the raised portion can be completely cut off in the range from the outer peripheral edge of the lower end surface of the tubular rotating body to the vicinity of the periphery of the anchor bolt.

According to the shaving rotary blade around the anchor bolt of the third aspect, since the hand-turning handle is detachably attached to the tubular rotating body, when the tubular rotating body is rotated by the rotating machine, the hand-turning handle is manually turned. By removing the handle from the tubular rotating body, it is possible to avoid the risk of the hand-held handle accidentally colliding with the operator's hand and to ensure safety. Further, when rotating the tubular rotating body without using a rotating machine, if a hand-turning handle is attached to the tubular rotating body, an operator can grip the hand-turning handle and apply a rotational force to the tubular rotating body. There is an advantage that work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a shaving rotary blade around an anchor bolt according to an embodiment of the present invention is connected to a rotary machine.

FIG. 2 is a bottom view of the shaving rotary blade around the anchor bolt according to the embodiment of the present invention.

FIG. 3 is a use explanatory view showing a cross-sectional view of a main part of a shaving rotary blade around an anchor bolt according to an embodiment of the present invention.

FIG. 4 is a side view showing a state in which a handwheel is attached to a shaving rotary blade around an anchor bolt according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which a handwheel is attached to a shaving rotary blade around an anchor bolt according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a cloth foundation in which a framework is built.

[Explanation of symbols]

 1 Shaving rotary blade around anchor bolt 2 Anchor bolt 3 Fitting hole 4 Cylindrical rotating body 4a Lower end surface 4b Upper end 5 Convex blade 5a Cutting edge 6 Step 7 Rotating machine 7a Output shaft 9 Handle 11 Handwheel

Claims (3)

[Claims] 1. A plurality of convex blades extending in the radial direction of the cylindrical rotating body having a fitting hole into which an anchor bolt can be fitted so as to be vertically movable, and having a blade tip directed inwardly of the fitting hole. Provided at equal angles, and at the upper end of the cylindrical rotating body,
A shaving rotary blade around an anchor bolt, which has a handle connected to the output shaft of a rotating machine. 2. The shaving rotary blade around an anchor bolt according to claim 1, wherein the lower end opening of the fitting hole is expanded in diameter to form a step portion, and the convex blade is projected inward of the step portion. 3. A shaving rotary blade around an anchor bolt according to claim 1 or 2, wherein a hand-turning handle protruding from a peripheral side surface thereof is detachably attached near the upper end of said cylindrical rotary member.