JPS6110884Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chip blowing device for a drill.

Drilling into the ceiling or ceiling slab of a building requires upward work, and to prevent chips from falling on the worker, protective goggles, a mask, or a dust-proof helmet are used. There is no dust-proofing effect, causing pain to workers and reducing work efficiency.

This invention utilizes the action of a soft plastic fan attached to the shank or chuck, which is the rotating part of the drill, to blow off chips generated during drilling and drop them to a location distant from the worker, thereby creating an environment for the upward drilling worker. The aim is to improve the

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drill chip blowing device according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a drill body containing an electric motor, which is no different from a conventional electric drill in that it has a drill at its tip. 3 is a fan made of soft plastic, and rotary blades 3b are integrally formed radially around a boss 3a. In the figure, the number of rotary blades 3b is two, but the number is not limited to two. The fan 3 is fixed with a screw 5 by fitting the boss 3a into the shank 4a of the cone 4. 3d is an annular guard fixed to the outer periphery of the wing 3b to prevent danger. Since the fan rotates during drilling, the state of the drilling can be seen through.

In addition, as a means of attaching the fan 3 to the shank 4a of the drill bit, as shown in FIG. It may be provided so that the side surface of the boss 3a always comes into contact with the tip end surface of the drill chuck 2 when the screw drill 4 rotates.

Next, the means for fixing the fan 3 to the drill chuck 2 will be described.

FIG. 4 shows the state in which the fan 3 is fixed using the chuck rotation support hole 2b of the drill chuck 2. In other words, the fixture 6 is the boss 3 of the fan.
A pin 6b is inserted into a through hole of a bracket 6a fixed to a, passes through a boss 3a, and fits into a chuck rotation support hole 2b, and a pin 6b is inserted between the lower surface of the bracket 6a and the pin 6.
It consists of a spring 6d that is compressed and encircled around the pin 6b and a spring receiver 6c fixed to the pin 6b.
Therefore, the tip of the pin 6b is inserted and held in the chuck rotation support hole 2b by the compressive repulsive force of the spring 6d, thereby fixing the fan 3 to the drill chuck 2.

Another example of fixing the fan 3 to the drill chuck 2 will be described with reference to FIGS. 5 and 6. This is a means for fixing the fan 3 using a bevel gear 2c that rotates the drill chuck 2. That is, the inner circumferential surface of the boss 3a of the fan consists of internal teeth 3c that mesh with the bevel gear 2c of the drill chuck, and a circular surface 3f that fits into the pawl holding portion 2d of the drill chuck. Two through holes 3e are drilled to match the turning support hole 2b, and the boss 3a of the fan is fitted into the drill chuck 2, and both ends of the snap ring 7 are inserted into the through holes 3e and into the chuck turning support hole 2b. The fan 3 is inserted and fixed to the drill chuck 2.

As mentioned above, the soft plastic fan 3 is fixed to the shank or drill chuck 2 and rotated together with the drill bit to blow air, thereby scattering the chips far away.Also, the tip of the drill tip is positioned on the object by adjusting the gap between the fans. It is easy to check the tip of the drill bit from the inside, and the state of the hole can also be seen through, so when drilling upwards into the ceiling of a building, etc., the work environment is significantly improved as chips do not fall directly onto the worker. This improves work efficiency. Since the fan 3 is made of soft plastic, it is light and safe to work with.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of the drill chip blowing device according to the present invention in which a fan is attached to the shank, and FIG. 2 is a partial sectional view of the drill chip blowing device according to the present invention. FIG. 3 is a perspective view showing an example of a fan provided with a guard, FIG. 3 is a partial sectional view showing another embodiment in which the fan is attached to a shank, and FIG. , is a partial sectional view showing one embodiment in which a fan is attached to a drill chuck, FIG. 5 is a partial sectional view showing another embodiment in which a fan is attached to a drill chuck, and FIG. 6 is a boss of the fan shown in FIG. FIG. 1...Drill body, 2...Drill chuck, 3
...Fan, 4...Awl, 5...Screw, 6...Fixing tool, 7...Snat spring.

Claims (1)

[Scope of utility model registration request] A swarf blowing device for a drill, characterized in that a fan made of soft plastic is attached to the shank or chuck, which is the rotating part of the electric drill.