JP3050075B2 - Machining tool with inner wall shape for mounting hole for embedded member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner wall shape of a mounting hole for an embedding member and a processing tool therefor. In particular, a hole is drilled in a concrete slab, and an anchor bolt or a steel material is embedded in the hole. The present invention relates to a processing tool for forming an inner wall surface of an embedding member mounting hole for installing a hole.

[0002]

2. Description of the Related Art Conventionally, when an embedding member is mounted on a concrete slab, a cylindrical hole is drilled in the concrete slab with a diamond core drill or the like, and an embedding member such as an anchor bolt or steel material is inserted into the hole. The hole is filled with concrete to fix the embedding member.

[0003]

However, the hole drilled with a diamond core drill or the like has a smooth inner wall surface, so that the adhesive strength between the filled concrete and the inner wall surface of the hole is weak, and the filled concrete has a hole. There was a problem that it escaped from. The present invention has been made in view of such circumstances, and provides a processing tool having an inner wall shape of an embedding member mounting hole that increases the adhesive force between the filled concrete and the embedding member mounting hole and increases strength against pulling. The purpose is to provide.

[0004]

[0005]

According to the present invention, in order to achieve the above object, a hole is drilled in a concrete slab, an embedding member is inserted into the hole, and the hole is filled with concrete. A machining tool for forming an inner wall shape of a mounting hole for fixing a member, wherein the machining tool is a head formed in a cylindrical shape by combining a plurality of segments formed in an arc shape, and connected to the head, A rotating shaft that transmits a rotational force to the head, and provided with a number of concave and convex blades on the outer peripheral portion of each segment forming the head, and a tapered shape along the axial direction of the head on the inner peripheral portion. Forming a groove, and forming a tapered ridge engaging with a tapered groove formed on an inner peripheral portion of each segment forming the head on the rotary shaft; The outer diameter of the head by sliding along the tapered ridge in the groove formed in the segments, characterized in that so as to scaling.

[0006]

[0007]

According to the present invention, the outer diameter of the head of a working tool can be increased or reduced by sliding a tapered ridge formed on a rotary shaft along a groove formed on a segment. it can. When processing the inner wall surface of a cylindrical hole drilled with a diamond core drill or the like with this processing tool, insert the processing tool into the cylindrical hole, and hold the tip of the head in contact with the bottom of the cylindrical hole. The rotating shaft is pushed while rotating along the axial direction of the hole. Thereby, the head is guided by the tapered groove and is pushed and expanded in a cylindrical shape, and the uneven blade provided on the outer peripheral portion of the pushed head cuts the inner wall surface of the hole, and the inner wall surface of the hole has a large number. Are formed.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a working tool for forming an inner wall surface of an embedding member mounting hole according to the present invention. FIG. 1 is a sectional view of a working tool according to an embodiment of the present invention, and FIG. 2 is a top view of the working tool according to an embodiment of the present invention. FIG. 3 is an exploded view of the working tool according to the embodiment of the present invention. As shown in FIGS. 1 to 3, the processing tool 10 includes a head 12 and a rotary shaft 14 connected to the head 12 and transmitting a rotational force to the head 12 as main members.

The head 12 has an arc-shaped 4
Are formed by combining two segments 16, 16,... In a cylindrical shape. Each of the segments 16, 16,... Forming the head 12 has a cutting blade 18,
.. Are arranged, and a tapered dovetail groove 20 is formed in the inner peripheral portion along the axial direction of the head 12. The dovetail groove 20 is tapered so that the depth of the groove becomes shallower toward the tip of the head 12. The cutting blades 18, 18,... Disposed on the outer periphery of the segments 16, 16,... Have a large number of uneven blades 22, 22,. , Are fixed to the segments 16, 16,... Via bolts 24, 24.

On the other hand, the rotating shaft 14 comprises a rotating shaft 25 formed in a columnar shape and a connecting portion 26 formed at the tip of the rotating shaft 25. The connecting portion 26 has the segment 16 , 16, ..., which are engaged with the tapered dovetail groove 20 formed in the tapered dovetail groove 20,
.. Are formed along the axial direction. The protruding ridge portion 28 is tapered so that the height of the protruding portion decreases toward the distal end of the connecting portion 26. The length of the connecting portion 26 is shorter than the length of the head 12.

The machining tool 10 includes the rotating shaft 1
, Formed on the connecting portion 26 of No. 4,
Dovetail grooves 20 formed in the segments 16, 16,...
Are engaged and integrated. Further, the segments 16, 16,...
Segment 1 to prevent it from falling off
Are attached to the rotating shaft 14, and the upper ends of the segments 16, 16,.
0 is secured via a bolt 32 as a stopper.

The operation of the embodiment of the working tool according to the present invention configured as described above is as follows. First, a cylindrical hole is drilled at the mounting position of the embedded member of the concrete slab using a diamond core drill or the like. Next, as shown in FIG. 4, a disk-shaped metal plate 36 is laid on the bottom surface of the hole 34 thus formed. The metal plate 36 is for preventing the bottom surface of the hole 34 from being broken when the processing tool 10 is pressed against the bottom surface of the hole 34.

Next, the machining tool 10 in which the head 12 and the rotary shaft 14 are integrated is inserted while rotating along the axis of the hole 34. In the state of FIG.
Are locked to the plate 30 provided on the rotating shaft 14, and the outer diameter of the head 12 is in a minimum state. Then, in this state, when the rotating shaft 14 is pushed in along the axis of the hole 34, as shown in FIG.
Contact 6 Further, when the rotating shaft 14 is pushed along the hole 34, the head 12 is pushed and expanded by being guided by the ridges 28 formed on the rotating shaft 14, so that the outer diameter of the head 12 is enlarged. I do. The head 12 having an enlarged outer diameter is provided with a cutting blade 1 provided on an outer peripheral portion thereof.
... rotate while contacting the inner wall surface of the hole 34,
Thus, concave and convex grooves 38, 38,... Orthogonal to the axis of the hole 34 are alternately formed on the inner wall surface of the hole 34 (see FIG. 6).

As shown in FIG. 7, after forming the concave and convex grooves 38 on the inner wall surface of the hole 34, the working tool 10 is removed from the hole 34. At this time, when concrete dust or the like is clogged in the tapered portions of the rotating shaft 14 and the head 12 and the rotating shaft 14 is difficult to be removed from the head 12, the upper end of the head 12 is fixed, or
Hit the top of the box with a hammer and pull it out. At this time, in order to prevent the hole 34 from being damaged, the laid metal plate 36 is also taken out together.

As shown in FIG. 8, an anchor bolt 40 is inserted as an embedding member into the embedding member mounting hole 34 'formed as described above, and concrete 42 is filled therearound. Is fixed. in this way,
According to the embedding member mounting hole 34 ′ of this embodiment, the filling concrete 42 for fixing the anchor bolt 40 is
.. Formed on the wall surface of the '′ wall and penetrates and hardens, so that even if the anchor bolt 40 is pulled along the axial direction of the hole 34', the concrete 42 for filling remains in the concave and convex grooves 38, 38,. 38, ... so that it does not fall out of the hole.

According to the working tool 10 of the present embodiment,
A tapered ridge 28 formed on the rotating shaft 14,
28,... Are formed on the head 12 by dovetail grooves 20, 20,.
., The outer diameter of the head 12 expands and contracts. Therefore, the machining tool 10 is inserted into a cylindrical hole 34 already drilled by a core drill or the like, and a rotating shaft is formed along the axial direction of the hole 34. By simply pushing while rotating 14, concave and convex grooves 38, 38,... Orthogonal to the axial direction of the hole 34 can be easily formed on the inner wall surface of the hole 34.

In this embodiment, an example is described in which the machining tool 10 is used for machining the inner wall surface of a hole drilled with a diamond core drill or the like. However, the present invention is not limited to this. Even when used for internal machining of holes
Good.

[0018]

As described above, the machining tool of the present invention
According to the inner wall shape of the embedding member mounting hole formed by using , the filled concrete penetrates and forms a large number of uneven portions formed on the inner wall surface of the hole, so that the filling concrete and the embedding member mounting hole are The adhesive strength increases, and the strength against pull-out increases.

Further, according to the working tool of the present invention, the working tool is inserted into a cylindrical hole which has already been drilled, and is pushed along the axis of the hole while rotating its rotary shaft. A large number of concave portions and convex portions can be easily formed on the inner wall surface of the device.

[Brief description of the drawings]

FIG. 1 is a sectional view of a working tool according to an embodiment of the present invention.

FIG. 2 is a top view of a working tool according to an embodiment of the present invention.

FIG. 3 is a development view of the working tool according to the embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of the working tool according to the embodiment of the present invention.

FIG. 5 is an explanatory view of the operation of the working tool according to the embodiment of the present invention.

FIG. 6 is an explanatory view of the operation of the working tool according to the embodiment of the present invention.

FIG. 7 is an explanatory view of the operation of the working tool according to the embodiment of the present invention.

FIG. 8 is an explanatory view illustrating the inner wall shape of the embedding member mounting hole according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Machining tool 12 ... Head 14 ... Rotating shaft 16 ... Segment 18 ... Cutting blade 20 ... Dovetail groove with taper 22 ... Concavo-convex blade 28 ... Protrusion part 30 ... Plate 34 '... Retaining member mounting hole 36 ... Metal plate 38 ... Concavity and convexity Groove 40 ... Anchor bolt 42 ... Filled concrete

Claims (1)

(57) [Claims] 1. A working tool for forming a hole in a concrete slab, inserting an embedding member into the hole, filling the hole with concrete, and forming an inner wall surface shape of a mounting hole for fixing the embedding member. The machining tool includes: a cylindrical head formed by combining a plurality of arc-shaped segments; and a rotating shaft connected to the head and transmitting a rotational force to the head. Along with providing a large number of concave and convex blades on the outer peripheral portion of each segment forming the head, forming a tapered groove along the axial direction of the head on the inner peripheral portion, and forming each of the heads on the rotating shaft A tapered ridge engaging with a tapered groove formed on the inner peripheral portion of the segment is formed, and the tapered ridge formed on the rotary shaft is formed on the segment. A machining tool having an inner wall shape of an embedding member mounting hole, wherein an outer diameter of the head is enlarged or reduced by sliding along a groove.