JPH061360Y2 - Insulation filling wall penetration tool - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a tool used for providing a through-hole for wiring an electric machine or the like on a work such as a wall filled with fibers such as glass as a heat insulating material. It is a thing.

(Prior Art) Walls (or ceilings) of houses are laminated with wood boards on both inside and outside, or mortar such as wall material is applied to the inside, and glass fibers etc. are filled inside as heat insulating materials. It is often done.

When a through hole is provided in such a workpiece for electrical wiring, an electric drill (Fig. 2) and a quadrangular pyramid "agri tool" (Fig. 3) have been conventionally used. And the wiring pipe was inserted in the through hole.

In this case, using only an electric drill for drilling has the following drawbacks.

A bit for an ordinary electric drill winds a fiber of an insulating material around a cutting edge, and it is very difficult to pull out the electric drill.

Even if the drill penetrated the wall surface, the hole was closed again due to the elasticity of the heat insulating material, and it took time to insert the pipe for wiring.

Also, if you use only the "Kuguri tool", you will have to make holes manually.

Therefore, the conventional method of providing a through hole in a work such as a wall of a house has to use two kinds of tools, that is, an electric drill and an "agri tool". Further, since the wiring pipe was inserted into the through hole after the through hole was provided, there was a problem that the employee did not finish in one time.

(Problems to be solved by the invention) The present invention is directed to a case where a heat insulating material is wrapped around a bit for an electric drill when a through hole for electric wiring is provided in a wall filled with a fiber such as glass as a heat insulating material. It solves the drawback of suddenly stopping the rotation of the motor, and when the bit is pulled out after the wall has been penetrated with a drill, the elasticity of the heat insulating material again closes the through hole, and it takes time to insert the wiring pipe. SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat-insulating material-filled wall penetrating tool (drill bit) that solves the drawbacks that have been spent in one operation and is completed in one operation.

(Means for Solving the Problem) In the conventional electric drill bit, the cutting edge is spirally cut as shown in FIG. 2, so that fibers or the like are easily wound around.

In the tool of the present invention, as shown in FIG. 4, the spiral cutting edge is changed to a polygonal pyramid, and grooves for sending out chips are provided vertically on each surface of the polygonal pyramid to prevent wrapping of fibers or the like. . Further, a pipe piece 2 for electrical wiring or the like having an outer diameter slightly smaller than the diameter of the bottom surface of the polygonal pyramid is used by passing it through a shaft 4 of a drill bit as shown in FIG.

In this way, at the same time when the drill bit penetrates the wall surface, the pipe piece 2 for wiring etc. is inserted into the wall, the drill bit is pulled out from the tip side, and the pipe piece 2 is left as it is set in the wall. It can be used for wiring.

At this time, the rubber clip 3 shown in FIG. 5 is used.
When the drill bit is pulled out by using, the movement of the pipe piece 2 to the drill body side (right side in the drawing) can be stopped.

In the conventional technology, a normal electric drill bit is used for drilling a wall surface made of wood board or mortar, the glass fiber portion inside the wall is penetrated with an agri tool, and the contracted glass fiber is pushed again. Although the work of pushing the pipe piece for wiring or the like has been performed, the work of the present invention can easily perform these works in one step.

(Embodiment) FIG. 1 is a view showing an embodiment in which the tool of the present invention is used for penetrating a wooden mortar wall. 1 is a cutting edge of a bit, 2 is a pipe piece for wiring, 4 is a bit shaft, 5 Is a wall of a wooden house, 6 is a mortar part, 7 is a wooden board (lath board, decorative board, etc.), 8 is glass fiber, and 9 is a wall surface through hole. Since the maximum diameter of the cutting edge 1 of the drill bit is designed to be slightly larger than the diameter of the wiring vip piece 2, the wiring pipe piece 2 inserted into the bit shaft 4 has the cutting edge of the bit at the wall of a wooden house. As the wood board 7 and the glass fiber 8 heat insulation material are hollowed out and entered, they are simultaneously pushed into it. When the bit penetrates a wall or the like, remove the bit from a drill (not shown) and pull the tip of the bit to pull it out of the wall. Since the cutting edge of the bit has no spiral groove and is a smooth polygonal pyramid,
No troubles such as involving the glass fiber of the heat insulating material.

Therefore, as in the prior art, tools are separately used for drilling holes in wall surfaces and the like for heat insulating materials, and due to the elasticity of heat insulating materials, when a through hole that has been opened once pulls out a hole drilling tool (for example, an agri tool), No more struggling to push in the wiring pipe due to contraction.

That is, by inserting the shaft of the drill bit of the present invention into a wiring pipe that penetrates a wall or the like and setting the shaft in the drill, the wiring work can be performed in one step.

(Effect of the Invention) As described above, the present invention provides a drill bit having a bit shaft capable of setting a polygonal pyramid cutting edge and a pipe piece for wiring such as an electric wire, thereby insulating fibers such as glass. The process of opening a through hole in the wall of a wooden house filled as a material and inserting a pipe piece for wiring such as an electric wire into three steps consisting of conventional wall surface drilling, heat insulating material drilling, and pipe insertion It was made easy to implement.

For this reason, the present invention has the advantages of improving work efficiency and preventing damage to the work, injury to workers, etc. resulting from the impact due to sudden stop of the motor due to the drill bit enclosing the heat insulating material.

[Brief description of drawings]

1 is an embodiment of the present invention, FIG. 2 is a plan view of a conventional drill bit for drilling, FIG. 3 is a plan view of a general-purpose drill tool, FIGS. 4 (a) and 4 (b) ) Is a plan view and a side view of the heat insulating material-filled wall penetrating bit, and FIG. DESCRIPTION OF SYMBOLS 1 ... Cutting edge of bit 2 ... Pipe piece for wiring 3 ... Clip 4 ... Bit axis 5 ... Wall of wooden house 6 ... Mortar part 7 ... Wood board 8 ... Glass fiber 9 ... Wall surface through hole

Claims (1)

[Scope of utility model registration request] 1. A drill bit constituted by a polygonal pyramidal cutting edge having vertical grooves on each surface and a steel shaft for setting the cutting edge on a drill, and a diameter of the bottom surface of the polygonal pyramid. A wiring pipe piece having a slightly smaller outer diameter, a length shorter than the length of the drill bit shaft, and having a hole through which the drill bit shaft can pass; When the drill bit is inserted into a work such as a wall, the drill bit is simultaneously inserted into a through hole opened by the drill, and when the bit is pulled out from the work,
Insulating material filled wall penetrating tool characterized by being left on the workpiece