JPS6240781Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drilling tool that creates a cut hole in concrete by applying reciprocating motion and rotational motion to the drill, applying impact and crushing by the reciprocating motion, and drilling by the rotary motion. .

When cutting holes are formed in metal or wood, the cutting waste produced by the drill is often coarse and band-shaped, and can be easily removed by the spiral relief groove on the outer circumferential surface of the drill. However, in the case of concrete, cutting chips are fine powder or small lumps, so they stagnate in the spiral relief groove and block it, making it impossible to excavate. Therefore, a discharge hole is provided from the tip of the drill bit to the base end to remove the cutting chips. It is also known to discharge the cutting waste through the interior of the drill and to use an air suction machine to collect the cutting waste without scattering it to the surroundings.

Conventionally, a concrete drilling tool equipped with a dust suction device has been disclosed, for example, in Japanese Utility Model Application Publication No. 7202/1983, but the tool described in this publication uses an electric motor that provides reciprocating and rotational motion to the drill. Since the electric motor powers both the drill and the dust suction fan, it must be large and heavy, making it disadvantageous for portable use. Furthermore, since the passage leading to the dust suction fan is formed inside the housing of the tool, the shape of the passage is complicated, and not only does cutting debris tend to stagnate, but it is difficult or impossible to disassemble and clean.

The present invention eliminates these drawbacks, allows cutting waste to be discharged without stagnation with a simple passage structure, and allows for easy disassembly and cleaning.Moreover, it uses a large motor for the tool or has a special dust-proof structure. It was devised for the purpose of providing a concrete drilling tool that does not require drilling and can be used in combination with a drive tool and drills of various types and sizes.

That is, in order to achieve this purpose, the concrete drilling tool of the present invention includes a drill having a cutting waste discharge hole penetrating from the cutting edge to the base end, and this drill being removably fixedly connected and communicating with the discharge hole. a coupling member having a connection hole opened on an outer circumferential surface; a drive tool to which the coupling member is removably coupled and provided in the axial direction of the drill to provide reciprocating and rotational motion to the drill; The coupling member is provided with a passage that is in constant communication with the connection hole and is provided in a direction perpendicular to the axial direction of the drill, and is connected to the air suction machine via a filter, and the coupling member is fitted in a rotatable and removable manner. It is structured as follows.

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a drill, 2 is a coupling member, 3 is a joint member,
Reference numeral 4 indicates a driving tool, and the drill 1 has a cutting waste discharge hole 6 that opens forward at a suitable position on the side of the blade of the cutting edge part 5 and penetrates to the base end, and is connected to a discharge port 6 that opens at a suitable position on the side. The suction port 7 has a proximal end that is removably fixedly connected to the distal end of the coupling member 2 by screwing. The coupling member 2 has a connection hole 9 bent at a right angle that opens toward the circular outer peripheral surface from a connection part 8 exemplified by a female thread at the tip, and a drill 1.
A connecting portion 1 consisting of a tapered shaft portion extending in the axial direction of
0, has this connecting part 10, has this connecting part 1
0 and is removably connected to the drive tool 4. Therefore, the drive tool 4 and the coupling member 2 are arranged in the axial direction of the drill 1, and the connecting hole 9 communicates with the discharge hole 6. The joint member 3 has an annular groove 12 provided toward a support hole 11 which is fitted almost tightly into the circular outer peripheral surface of the coupling member 2 and rotatably supported, and this annular groove 1.
2 to the tip of the pipe joint 13 extending in a direction perpendicular to the axial direction of the drill 1, this passage 14 is constantly in communication with the connecting hole 9 through the annular groove 12, and the pipe A flexible tube 17 connected to the joint 13 is connected to an air suction device 19 via a filter 18. In addition, the connecting member 2
A flange portion 16 facing inward of the joint member 3 is in contact engagement with a stepped portion 15 facing the connecting portion 10 of the joint member 3 .

In this embodiment, the drive tool 4 gives the drill 1 reciprocating motion and rotation through the coupling member 2 to excavate the concrete while crushing it, and at the same time operates the air suction machine 19 to remove cutting waste. It is sucked together with air through the discharge hole 6, the connection hole 9, the passage 14, and the pipe 17, and the cutting waste is filtered out by the filter 18.

In the embodiment shown in FIG. 1, the discharge hole 6 is provided eccentrically to the drill 1 as shown in FIG. 2, but in the embodiments shown in FIGS. 3 and 4, the discharge hole 6 is provided concentrically. , two intake ports 20 sandwiching the blade between the blade edge portion 5,
20 is opened and the discharge hole 6 is communicated with the opening.

Incidentally, the drill 1 is connected to the connecting member 2 by not only screwing but also taper fitting, spline fitting, etc.
Further, the coupling member 2 is connected to the driving tool 4 by other spline coupling such as taper fitting, screwing, etc.
Furthermore, the position, number, and dimensions of the openings in the cutting edge portion 5 of the drill 1 for taking in cutting waste are appropriately set depending on the diameter of the drill 1 and the shape of the cutting edge portion.

According to the present invention configured as described above, fine cutting debris from the concrete is discharged through the discharge hole inside the drill, so that it does not accumulate on the outer circumferential surface of the drill and increase the resistance when driving. It is possible to reduce the power of the tool and increase the degree of drilling, and since the cutting debris enters the exhaust hole together with air by the air suction machine and is sucked out, it is possible to reduce the power of the tool and increase the drilling rate. Cutting debris can be smoothly and completely discharged.

In particular, according to the present invention, the electric motor of the drive tool provides only the power to drive the tool, so it is large in size.
Not only is there no need to use a heavy tool, cutting debris is discharged from the coupling member and joint member in front of the drive tool by an air suction machine, so there is no need for the electric motor to have a special dust-proof structure. This objective is achieved without complicating the structure of the tool. In addition, since the path of the joint member that discharges cutting waste through the filter and toward the air suction device is perpendicular to the drill axis direction, the cutting waste passes linearly through the drill, the coupling member, and the joint member, and stops along the way. This means that the direction is changed only once to discharge the cutting chips, so the discharge route is extremely simple and there is no possibility of stagnation of the cutting chips. Furthermore, since the drill, coupling member, joint member, and drive tool are removable from each other and are provided axially, they can be easily disassembled and cleaned even if cuttings become lodged; By preparing the coupling member with various dimensions and connection structures, it is possible to attach the drill to various types of drive tools via the coupling member, or to attach various types and structures to a specific drive tool.
This has the excellent effect that holes of various sizes can be formed by attaching drills of different sizes.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a side view, FIG. 3 is a front partial view of a different embodiment of the drill, and FIG. 4 is a side view. DESCRIPTION OF SYMBOLS 1...Drill, 2...Connection member, 3...Joint member, 4...Drive tool, 6...Blade tip, 9...Connection hole, 14...Passway, 18...Filter, 19...
Air suction machine.

Claims (1)

[Scope of utility model registration request] A drill 1 having a cutting waste discharge hole 6 penetrating from the cutting edge portion 5 to the base end portion, and a connecting hole 9 which is removably firmly connected to the drill 1 and communicated with the discharge hole 6 and opened on the outer circumferential surface. a coupling member 2 having a
a drive tool 4 provided in the axial direction of the drill 1 to provide reciprocating motion and rotational motion to the drill 1; and a filter 18 provided in a direction perpendicular to the axial direction of the drill 1 and constantly communicating with the connection hole 9 of the coupling member 2. A concrete drilling tool comprising a joint member 3 having a passage 14 connected to an air suction device 19 through a joint member 3 and a coupling member 2 rotatably and removably fitted therein.