JPH0442160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device. More specifically, the present invention relates to a device for making holes in flexible materials.

Flexible material is a general term for materials made of flexible materials such as sponge. Examples include a lip-shaped seal lip or a door weather strip 3 shown in FIG.

As shown in FIG. 1, the door weather strip 3 is attached around the door of a car to prevent rain,
It is used to hold the door while preventing wind and dust from entering the room and absorbing vibration and noise during driving. The material used is sponge rubber. The door weather strip 3 consists of a door mounting part 7 and a hollow seal lip 8, and the hollow seal lip 8 expands and contracts as the door is opened and closed. A door mounting portion 7 of the door weather strip 3 is provided with a fastener mounting hole 4 for mounting the door weather strip to the door. Further, the hollow seal lip 8 is provided with an air hole 5 for releasing the air compressed in the hollow portion when the door is closed.

A hole-making device shown in FIG. 3 is known as a conventional hole-making device for making holes in a flexible material such as a weather strip. That is,
This device consists of a router 1 that can be moved vertically.
A drill 2 is attached to the reuter 1. The tip of the drill 2 is formed with ∩-shaped drilling teeth 11. Reuter 1
is rotated by the rotational force of a motor (not shown) transmitted via a belt, or by compressed air directly sent.

However, when attempting to drill a hole in a flexible material using this type of conventional hole-drilling device, the flexible material deforms as soon as the drilling teeth of the drill 2 come into contact with the flexible material. It is not possible to make a hole in a certain position. In particular, when the door weather strip 3 is made of a flexible material, it cannot be backed due to the hollow portion, resulting in a large amount of deformation. Therefore, it becomes more difficult to drill holes at accurate locations.

Furthermore, the cut end 6 after making the hole remains without being separated from the door weather strip 3, as shown in FIG. As a result, when the door is closed, the incisal end 6 gets stuck in the air hole 5, and the compressed air in the hollow part of the door weather strip 3 has no escape port.

The present invention has been made with the aim of improving these drawbacks of conventional drilling devices.

The device of the present invention is a drilling device for making holes in a flexible material with a drill, in which the drill is formed into a cylindrical shape, the inside of the cylindrical shape is connected to a suction pump, and the inside of the cylindrical shape is connected to a suction pump. This hole-drilling device is characterized by being provided with an extrusion pin that moves reciprocally so as to be able to protrude from the tip of the drill by the operation of the drill.

Here, the flexible material means anything that is easily deformed when a drill comes into contact with it. A typical example is something that has a hollow part made of sponge rubber, such as a door weather strip. but,
Not limited to this, things that do not have a hollow part, for example,
It also means a lip-shaped seal lip.

Further, the apparatus for making holes with a drill has a reuter 1 that is movable in the vertical direction, and a drill 2 is attached to the reuter 1. just,
The direction of movement is not limited to up and down, but also includes left and right. Drill 2
A hole forming tooth 11 having a circular horizontal cross section is formed at the tip. Further, it is desirable that the surface roughness of the drill 2 is fine. The reuter 1 is rotated by the rotational force of a motor (not shown) transmitted via a belt or directly, or by the compressed air supplied. Embodiments of the present invention will be described below based on the drawings.

FIG. 4 shows a first embodiment.

The apparatus for drilling holes has a reuter 1 that can move forward and backward, and a drill 2 is attached to the reuter 1. A drilling tooth 11 having a circular horizontal cross section is formed at the tip of the drill 2.

Note that it is desirable that the surface roughness of the drill 2 is fine. The reuter 1 is rotated by the rotational force of a motor (not shown) that is transmitted via a belt or directly, or by the compressed air that is supplied. Of course, the driving means for the router 1 is not limited to this.

A drill 2 is attached to the router 1, and the drill 2 is formed into a cylindrical shape. The tip of the drill 2 is open, and the opening diameter is preferably large. The inner stem and shape of the cylindrical interior are arbitrary.

An air outlet 40 is provided in the side wall for connecting the cylindrical interior to a suction pump. Just air outlet 4
0 does not necessarily need to be provided on the side wall, and may be provided on the top of the drill 2. At this time, it will be connected to the suction pump via the router 1.

In the first embodiment, the cylindrical interior and the suction pump are connected via the suction holder 12. That is, the suction holder includes a hollow portion 14 through which the drill 2 passes;
A vent 1 that communicates the hollow part 14 and the suction pump
6. The suction holder 12 and the drill 2 are fitted so that the drill 2 can rotate freely so as to surround the outer periphery of the air suction port 40 of the drill 2.

On the other hand, the suction holder 12 is fixed to the reuter 1 through the support rod 42 at the ventilation port 16 .

An extrusion pin 44 is provided in the cylindrical interior so as to be reciprocated so as to be able to protrude from the tip of the drill by the operation of a suction pump. In the first embodiment, an extrusion pin 44 is attached to the tip of the drill 2 via a spring 46.

FIG. 5 shows a second embodiment.

The shape of the suction holder 12 is the same as in the first embodiment.

In the second embodiment, the drill 2 is attached to the suction holder 12.
It is fitted so that it can slide and rotate freely. When the drilling teeth 11 of the drill 2 come into contact with the flexible material 3, the air suction port 40 closes to the suction holder 12.
The position of the suction holder 12 is determined so that it communicates with the vent 16 through the hollow part 14 of the holder. An extrusion pin 44 is provided inside the cylindrical portion as in the first embodiment.

FIG. 6 shows a third embodiment. In the third embodiment, a lower stopper 48 and an upper stopper 50 are provided on the inner wall of the drill, and an extrusion pin 44 is provided therebetween for reciprocating movement.

Next, the hole making procedure of the present invention will be explained.

In the first embodiment, when the router 1 is moved forward,
The drill 1 and the suction holder 16 move forward together, and the drilling teeth 11 come into contact with the flexible material 3.

The flexible material 3 closes the cylindrical tip opening. The cylindrical interior is exhausted through the air suction port 40 and the vent 16, and the cylindrical interior becomes a negative pressure and the flexible material 3 is sucked inward. At that time, the ejector pin changes from the protruding state to the retracted state due to the negative pressure and the reaction force of the flexible material. When the reuter 1 is further advanced in this state, the drill 2 drills a hole in the flexible material 3. When the reuter 1 is moved back when drilling is completed, the reuter 1, drill 2, and suction holder 12 are moved back together.

After drilling, the incisal end 6 may become caught between the drilling teeth 11. At this time, the cylindrical interior is maintained at negative pressure. When the suction pump is stopped, the inside of the cylinder returns to normal pressure and due to the reaction force of the spring 46, the push-out pin 44
stands out. In this case, the incisal edge 11, which is sandwiched between the drilling teeth 11, is separated from the drilling teeth.

In the second embodiment, when the reuter 1 is moved forward, the drill 2 is moved forward. The suction holder 12 does not move relative to the flexible material 3.

When the drill 2 comes into contact with the flexible material 3, the cylindrical interior is evacuated through the air outlet 40 and the vent 16, as shown in FIG. 5b. At this time, the inside of the cylinder becomes a negative pressure and sucks the flexible material 3. Further, the reuter 1 is advanced to make a hole.

After making the hole, when the reuter 1 is moved back, the hollow interior communicates with the atmosphere through the air suction port 40, as shown in FIG. 5a. Air enters the cylindrical interior through the air suction port 40 and returns to normal pressure. Therefore, the cutting edge 6 that may adhere to the drilling tooth 11 falls due to the force of the spring 46 and its own weight. That is, in the second embodiment, the incisal end 6 can be separated from the drilling tooth 11 without stopping the vacuum pump.

The third embodiment has the same procedure as the first and second embodiments, but uses the weight of the push-out pin 44 instead of the force of the spring 46.

Since the present invention is constructed as described above, the holes can be formed at accurate positions. In addition, the hole can be cut with good precision, and the cutting edge can be completely separated from the flexible material. In addition, the cut end attached to the drill can be easily separated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the mounting portion of the door weather strip. FIG. 2 is a perspective view of the weather strip. FIG. 3 is a side view showing a conventional device. 4, 5, and 6 show embodiments of the present invention, with FIG. 4 being a partial sectional view and FIG. 5 being a sectional view. FIG. 6 is a partial view and a sectional view. 1... Reuter, 2... Drill, 3... Flexible material (weather strip), 4... Fastener mounting hole,
5...Air hole, 6...Incisal end, 7...Door attachment part, 8...Hollow rail lip, 10...Drilling device, 11...Drilling tooth, 12...Suction holder, 14...Hollow part, 16...
Ventilation port, 40...Air suction port, 42...Support rod, 44
...Extrusion pin, 46...Spring, 48...Lower stopper, 50...Upper stopper.

Claims (1)

[Claims] 1. In a drilling device that uses a drill to make a hole in a flexible material, the drill is formed into a cylindrical shape, the inside of the cylindrical shape is connected to a suction pump, and the inside of the cylindrical shape is drilled by the operation of the suction pump. A hole-making device characterized by being provided with an extrusion pin that reciprocates and can protrude from its tip.