JP7682468B2 - drilling machine - Google Patents

Description

The present invention relates to a drilling machine for drilling pipes.

Conventionally, chips are generated when drilling piping. These chips may have a negative effect when drilling piping. In response to this, a drilling machine is known that can efficiently drill holes even when chips are generated (for example, Patent Document 1).

This type of drilling machine forms a deep hole inside the hole saw that opens on the cutting blade side, and also forms a groove that connects to this deep hole, with a spiral groove carved into the opening side of the deep hole. This allows the cutting chips to be stored inside the deep hole, eliminating any adverse effects caused by the cutting chips, and allowing for efficient drilling of pipes.

Patent No. 2890190

Conventional drilling machines, including the one disclosed in Patent Document 1, are generally used in branching work for pipes supported on the ground or underground. Here, when the drilling machine disclosed in Patent Document 1 is used to drill the top surface of a pipe, cutting chips are stored in the deep hole. On the other hand, when drilling the bottom surface of a pipe, there is a risk that the cutting chips will fall under their own weight and get into the drilling machine, which can lead to damage to the drilling machine. In addition, there is a problem in that it is difficult to remove the cutting chips if they get into the drilling machine.

In view of these problems, the present invention aims to provide a drilling machine that can prevent chips from getting into the drilling machine when drilling the underside of a pipe.

In order to solve such problems, the present invention provides a drilling machine for drilling an underside of a pipe, the drilling machine comprising: a body having a top body and an underbody; a cutter for drilling the pipe; a spindle to which the cutter is attached; a movable anti-vibration part attached to the outer periphery of the spindle inside the underbody and preventing the spindle from wobbling; a movable anti-vibration stopper for preventing the movable anti-vibration part from falling under its own weight when drilling the underside of the pipe; and a dust seal for storing chips generated when the cutter drills the underside of the pipe , the movable anti-vibration stopper being displaceable between a locked position in which the falling movement of the movable anti-vibration part is restricted and a free position in which the falling movement of the moving anti-vibration part is not restricted, the drilling machine further comprises an operating part for switching the position of the moving anti-vibration stopper between the locked position and the free position, and the dust seal is provided on the moving anti-vibration part .

The drilling machine according to the present invention is characterized in that it comprises a spindle to which the cutter is attached and a movable anti-vibration part that prevents the spindle from wobbling, and the dust seal is provided on the movable anti-vibration part.

In addition, in the drilling machine according to the present invention, the dust seal is characterized by having a storage recess in which the chips are stored.

The present invention provides a drilling machine that can prevent chips from getting into the drilling machine when drilling the underside of a pipe.

FIG. FIG. FIG. 2 is a diagram showing the procedure for preparing a drilling machine for drilling. FIG. 2 is a diagram showing the drilling procedure of the drilling machine. 11A to 11C are diagrams showing a method for removing chips accumulated in the dust seal.

The following describes an embodiment of the present invention in detail with reference to the drawings.

(External view of the drilling machine 1)
First, an external view of a drilling machine 1 will be described with reference to FIG.

The drilling machine 1 comprises a cylindrical body 2 having a length in the vertical direction, and a spindle 3 to which a cutter 17, described later, is attached. Here, the body 2 is composed of a top body 2a and an underbody 2b that is provided below the top body 2a and that houses a moving anti-vibration part 10, described later. The spindle 3 also comprises a head 3a, a hexagonal part 3b, a tip part 3c, and a tip groove part 3d.

The drilling machine 1 also has a feed handle 4 that can be rotated in the release direction and the drilling direction, a purge port coupler 5 that checks the airtight performance of the drilling machine 1 by applying pressure, and a knob 7 that switches the position of the vibration prevention ring stopper 15 (described later) between a locked position and a free position.

(Cross-sectional view of the drilling machine 1)
Next, a partial cross-sectional view of the drilling machine 1 will be described with reference to Fig. 2. Fig. 2(A) is a partial cross-sectional view of the moving anti-vibration unit 10, and Fig. 2(B) is an enlarged cross-sectional view of the moving anti-vibration unit 10.

As shown in FIG. 2(A), the drilling machine 1 is provided with a power switch 8 for switching the power of the drilling machine 1 ON/OFF, a power plug 9, and a moving anti-vibration unit 10 is provided inside the underbody 2b. Here, the moving anti-vibration unit 10 includes a moving anti-vibration ring 11 for preventing the spindle 3 from wobbling during drilling, a ball plunger 12 built into the inner diameter of the moving anti-vibration ring 11, an O-ring 13 for elastically mitigating the impact when the moving anti-vibration unit 10 collides with the inner surface 2c of the underbody 2b when the spindle 3 is pulled up, a dust seal 14 made of an elastic body (e.g., urethane rubber), and an anti-vibration ring stopper 15 for preventing the moving anti-vibration ring 11 from falling under its own weight.

As shown in FIG. 2(B), the dust seal 14 has a storage recess 14a that stores chips C generated when drilling the pipe P described below, and a protrusion 14b that abuts against the inner surface 2c of the underbody 2b.

As shown in FIG. 2(B), the moving vibration-proof unit 10 is provided with an air vent 20, which is a passage for discharging gas inside the drilling machine 1 to the outside of the drilling machine 1 and taking in air from the outside of the drilling machine 1 into the inside of the drilling machine 1, and a mesh unit 21 for preventing chips C, which will be described later, from entering the inside of the drilling machine 1 through the air vent 20.

(Procedure for preparing the drilling machine 1)
Next, the procedure for preparing the drilling machine 1 for drilling will be described with reference to FIG.

First, as shown in FIG. 3(A), the center drill 18 is attached by inserting it into the cutter 17, and the cutter 17 with the center drill 18 attached is attached to the tip 3c of the spindle 3.

Next, as shown in FIG. 3(B), the position of the knob 7 is checked to confirm that the anti-vibration ring stopper 15 is in the free position, and then the clutch (not shown) built into the drilling machine 1 is released. Then, the spindle 3 is raised to the top in the direction of arrow A, and the cutter 17 is stored within the inner surface 2c of the underbody 2b.

Next, as shown in Figure 3 (C), insert the spindle stopper 16 and check that the spindle 3 and the movable anti-vibration ring 11 are securely raised to the top position, and then attach the drilling machine 1 to the piping P, which will be described later.

Next, as shown in Figure 3 (D), while maintaining the feed handle 4 in the release direction, the hexagonal portion 3b of the spindle 3 is pushed in the direction of arrow B while aligning the surface, and at the same time, the tip groove portion 3d of the spindle 3 is engaged with the ball plunger 12, pushing the movable anti-vibration ring 11 to the front of the underbody 2b, and the anti-vibration ring stopper 15 is set from the free position to the locked position by rotating the knob 7. At this time, it is a good idea to check the airtightness of the drilling machine 1 from the purge port coupler 5.

3(E) , rotate the feed handle 4 in the drilling direction to check that the spindle 3 is engaged. Then, rotate the feed handle 4 in the drilling direction to lower the center drill 18 to the surface of the pipe P, which will be described later.

(Drilling procedure of drilling machine 1)
Next, the drilling procedure of the drilling machine 1 will be described with reference to FIG.

First, as shown in FIG. 4(A), insert the power plug 9 into a power outlet (not shown) and turn the power switch 8 ON.

Next, as shown in FIG. 4(B), the center drill 18 is placed against the underside of the pipe P, and the feed handle 4 is rotated in the drilling direction to drill a hole. At this time, it is a good idea to perform a purging operation to check the pressure inside the pipe P through the purge port coupler 5.

Next, as shown in FIG. 4(C), when drilling using the drilling machine 1 is completed, the power switch 8 is operated to turn it OFF, and the power plug 9 is removed to complete the drilling operation.

(Method of Removing Chips C Accumulated in Dust Seal 14)
Next, a method for removing the chips C accumulated in the dust seal 14 will be described with reference to FIG.

Figure 5 (A) is an enlarged cross-sectional view of the moving vibration prevention part 10 after drilling the underside of the pipe P using the drilling machine 1 in this embodiment. When drilling the underside of the pipe P using the drilling machine 1 in this embodiment, chips C fall due to their own weight, but the chips C accumulate in the storage recess 14a of the dust seal 14, so that the chips C can be prevented from entering the inside of the drilling machine 1. In addition, the protrusion 14b of the dust seal 14 abuts against the inner circumferential surface 2c of the underbody 2b, so that the chips C can be prevented from entering the inside of the drilling machine 1. As a result, damage that may occur due to the chips C entering the drilling machine 1 can be prevented in advance.

Then, as shown in FIG. 5(B), a magnet M is used to clean and remove chips C that have accumulated in the storage recess 14a of the dust seal 14.

When drilling the pipe P using the drilling machine 1, it is possible that chips C will be generated that exceed the capacity that can be stored in the storage recess 14a of the dust seal 14. However, the chips C that exceed the capacity that can be stored in the storage recess 14a of the dust seal 14 will accumulate near the dust seal 14. For this reason, by using the magnet M, the chips C stored in the storage recess 14a of the dust seal 14 and the chips C that exceed the capacity that can be stored in the storage recess 14a of the dust seal 14 can be cleaned together.

Other Embodiments
Other embodiments will be described below.

In the above-described embodiment, the groove of the storage recess 14a of the dust seal 14 has a U-shape, but this is not limited to this. For example, the groove of the storage recess 14a of the dust seal 14 may have a V-shape or another shape.

In the above embodiment, the chips C that have accumulated in the storage recess 14a of the dust seal 14 are removed and cleaned using a magnet M, but this is not limited to this. For example, the chips may be removed and cleaned using a rag or other materials.

In particular, if the pipe P to be drilled is made of metal, the chips C are also made of metal, so it is advisable to use a magnet M to remove and clean the chips C as described above. On the other hand, if the pipe P to be drilled is made of plastic, it is advisable to use a rag or the like to remove and clean the chips C.

In this way, when the drilling machine 1 of the present invention is used to drill the underside of the pipe P, the blade of the cutter 17 bites into the pipe, generating chips C. The generated chips C then fall under their own weight and accumulate in the storage recess 14a of the dust seal 14 provided in the moving anti-vibration unit 10. This makes it possible to prevent the chips C from entering the drilling machine 1.

(First Invention)
The first invention is a drilling machine capable of drilling the underside of a pipe (e.g., pipe P), characterized in that it comprises a cutter (e.g., cutter 17) for drilling the pipe, and a dust seal (e.g., dust seal 14) for storing chips (e.g., chips C) generated when the cutter drills the underside of the pipe.

(Second Invention)
The second invention is the drilling machine described in the first invention, characterized in that it comprises a spindle (e.g., spindle 3) to which the cutter is attached, and a moving anti-vibration part (e.g., moving anti-vibration part 10) that prevents the spindle from wobbling, and the dust seal is provided on the moving anti-vibration part.

(Third Invention)
In a third aspect of the present invention, there is provided a drilling machine according to the first or second aspect of the present invention, characterized in that the dust seal is provided with a storage recess (e.g., a storage recess 14a) in which the chips are stored.

The above embodiments and variations are merely examples and may be modified as appropriate without departing from the scope of the present invention.

REFERENCE SIGNS LIST 1 Drilling machine 2 Body 2a Top body 2b Underbody 2c Inner surface 3 Spindle 3a Head 3b Hexagonal portion 3c Tip portion 3d Tip groove portion 4 Feed handle 5 Purge port coupler 7 Knob 8 Power switch 9 Power plug 10 Moving anti-vibration portion 11 Moving anti-vibration ring 12 Ball plunger 13 O-ring 14 Dust seal 14a Storage recess 14b Convex portion 15 Anti-vibration ring stopper 16 Spindle stopper 17 Cutter 18 Center drill 20 Vent 21 Mesh portion C Cutting chips M Magnet P Piping

Claims (2)

A drilling machine for drilling a bottom surface of a pipe,
a body having a top body and an underbody;
A cutter for drilling holes in the pipe;
a spindle to which the cutter is attached;
A movable vibration prevention part that is attached to an outer periphery of the spindle inside the underbody and prevents the spindle from vibrating.
a moving vibration-proof stopper that prevents the moving vibration-proof part from falling under its own weight when drilling a hole in the lower surface of the pipe;
a dust seal for storing chips generated when the cutter pierces the lower surface of the pipe;
Equipped with
The moving vibration stopper is
The movable anti-vibration unit is displaceable between a locked position where the falling movement of the movable anti-vibration unit is restricted and a free position where the falling movement of the movable anti-vibration unit is not restricted,
The movable vibration stopper further includes an operating unit that switches the position of the movable vibration stopper between the locked position and the free position,
The dust seal is
A drilling machine characterized in that it is provided on the moving anti-vibration part . The dust seal is
2. The drilling machine according to claim 1 , further comprising a recess for storing the chips.