JPH0438558B2 - - 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 a conventional drilling device of this kind, the drilling teeth of the drill 2 deform the flexible material as soon as they 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.

Further, the cut end 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 hole-drilling device that uses a drill to make a hole in a flexible material, in which the drill passes through the holder, and a negative pressure is created in the suction holder before and during cutting of the material by the high-speed rotating drill. This is a hole punching device that allows the holder to be pressurized after cutting.

By flexible material we mean anything that is easily deformed when a drill comes into contact with it. A typical example is a weather strip made of sponge rubber and having a hollow part. However, the present invention is not limited to this, and includes a lip-shaped seal lip that does not have a hollow portion, for example.

4, 5 and 6 show the first embodiment. 4 and 5 show the reuter, drill, and suction holder of the drilling device, and FIG. 6 shows a conceptual diagram of the suction device of the drilling device. FIG. 4 is a perspective view, and FIG. 5 is a sectional view.

The device for drilling holes has a router 1 that can be moved up and down. However, a router that can be moved left, right, or diagonally may also be used. A drill 2 is attached to the relay 1. The tip of the drill 2 is formed with ∩-shaped drilling teeth 11.
However, the shape of the hole teeth 11 is not limited to the ∩ shape.

Note that it is preferable that the surface roughness of the drill 2 is finer since the drill 2 can slide and rotate more smoothly. The reuter 1 rotates using driving force such as the rotational force of a motor (not shown) that is transmitted via a belt or directly, or the compressed air that is fed. Of course, the driving means for the router 1 is not limited to this.

In the present invention, a suction holder 12 is provided. The suction holder 12 has a hollow portion 14 through which the drill 2 can slide and rotate freely. Hollow part 14
The inner diameter of the upper opening of the drill 2 should be such that the drill 2 can barely slide into it. On the other hand, the inner diameter of the lower opening may be large as long as it is equal to or less than the width of the flexible material 3. Further, the inner diameter of the suction holder 12 between the upper opening and the lower opening of the hollow portion 14 is arbitrary. For example, the 10th
As shown in the figure, the diameter may be several times the outer diameter of the drill 2.

Further, the external shape may be angular or columnar.

In the first embodiment, the thick part of the suction holder 12 is a part that comes into contact with the flexible material 3, that is, a contact part 18. However, as shown in FIG. 10, a plate may be provided and this may be used as the contact portion.

The suction holder 12 has a vent 16 that connects the hollow portion 14 to the outside. In this embodiment, it is located on the side. However, it may also be provided above as shown in FIG.

The suction holder 12 is provided separately from the reuter 1 in the first embodiment.

As shown in FIG. 6, the vent 16 communicates with a means for controlling the internal pressure of the suction holder 12 (described in detail below), and the vent 16 is connected to a means for controlling the internal pressure of the suction holder 12 (described in detail below). Negative pressure is applied to the tip of the drill 2, and the pressure inside the suction holder 12 is switched and controlled by the control means so that pressurization is applied after cutting. That is,
The control means is in this embodiment a two-way switching cock 52, and the internal pressure source of the suction holder 12 is a suction pump 54. That is, it is connected to the two-way switching switch 52. One end of the two-way switching socket 52 is connected to the suction side end of the suction pump 54, and the other end of the two-way switching socket 52 is connected to the pressurizing side end of the suction pump 54.

A second embodiment is shown in FIG.

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 has circular drilling teeth 1.
1 is formed. The shape of the inner diameter of the cylindrical interior is arbitrary.

An air suction port 40 for connecting the cylindrical interior to the switching pot 52 is provided on the side wall. However, the air suction port 40 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 switching point 52 via the router 1.

In the second embodiment, the cylindrical interior and the switching pot 52 are connected via the suction holder 12. That is, the suction holder 12 has a hollow part 1 through which the drill 2 penetrates.
4, and a vent 16 that communicates the hollow portion 14 with the suction pump. Air intake port 4 of drill 2
The suction holder 12 and the drill 2 are fitted so as to surround the outer periphery of the drill 2 so that the drill 2 can rotate freely.

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

Between the ventilation port 16 and the suction pump 54, a first
A switching knob 52 is provided as in the embodiment.

FIGS. 8 and 9 show a third embodiment.
The drill 2 is similar to the second embodiment.

The hollow part of the suction holder 12 is the upper hollow part 14a.
The upper hollow part 14a has an upper vent 16a and a lower hollow part 14b.
is provided with a lower vent hole 16b. The upper vent 16a is connected to the pressure side of the suction pump 54, and the lower vent 16b is connected to the suction side of the suction pump 54. The suction holder 12 is attached separately from the reuter 1, and the drill 2 is slidable and rotatable with respect to the suction holder.

The suction holder 12 is arranged as follows. That is, when the hole-forming tooth 11 of the drill 2 comes into contact with the flexible material 3, the cylindrical interior contacts the suction side end of the suction pump 54 via the air suction port 40, the lower hollow portion 14b, and the lower vent port 16b. When the drilling tooth 11 of the drill 2 is at a certain distance from the flexible material 3, the cylindrical interior is connected to the suction pump through the air suction port 40, the upper hollow part 14a, and the upper vent hole 16a. 54 on the pressure side.

Next, a hole-making procedure using the apparatus of the present invention will be explained.

In the case of the first embodiment, first, the contact portion 18 of the suction holder 12 is brought into contact with the portion of the flexible material 3 where the hole is to be provided.

Next, the router 1 is moved forward. As the repeater 1 moves forward, the drill 2 also moves forward. Drill 2
When the perforation teeth 11 reach the upper opening of the suction holder 14, the upper and lower openings of the suction holder 12 are closed by the flexible material 3 and the perforation teeth 11. At that time, the ventilation port 16 is opened by the switching knob 52.
is connected to the suction side of the suction pump 54. When the air is exhausted from the vent 16 in this state, the pressure in the hollow part 14 becomes negative. As a result, the flexible material 3 has a suction holder 12
is attracted to. When the reuter 1 is further advanced, the drill 2 comes into contact with the flexible material 3, and the flexible material 3
Drilling begins with the gas being sucked. At this time, it is preferable that the drill 2 rotates at a high speed.

Once the drilling is completed, the reuter 1 is moved back. The cut end 6, which has completely separated from the flexible material 3, may become stuck in the lower opening of the suction holder 12. At that time, the suction pump 54
When switched to the pressure side, pressurized air is sent to the hollow part of the suction holder mouth and blows away the incisal end 6 caught in the lower opening of the suction holder 12.

In the second embodiment, when the reuter 1 is moved forward, the drill 2 and the suction holder 12 move forward together, and the drilling teeth 11 come into contact with the flexible material 3.

Since the drill 2 is formed into a cylindrical shape and has an open end, the flexible material 3 closes the opening at the cylindrical end. At this time, the ventilation port 16 is connected to the suction side of the suction pump 54 by the switching knob 52 .
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. When the reuter 1 is further advanced in this state, the drill 2 drills a hole in the flexible material 3. Reuter 1 when drilling is completed
When the reuter 1, drill 2, and suction holder 12 are moved back, they move back together.

When reversing, the ventilation port 16 is closed by the switching knob 52.
When connected to the pressurizing side of the suction pump 54, pressurized air is fed into the suction holder 12. This point also applies to the first implementation side.

In the third embodiment, when the reuter 1 is moved forward, the drill 2 is moved forward. The suction holder 12 does not move. When the drill 2 comes into contact with the flexible material 3, the cylindrical interior is connected to the suction side of the suction pump 54 via the air suction port 40, the lower hollow part 14b, and the lower ventilation port 16b, as shown in FIG. and exhausted. At this time, the inside of the cylinder becomes a negative pressure and sucks the flexible material 3. Further advance Reuter 1,
Make holes.

After drilling, the incisal edge 6 separated from the flexible material 3 may adhere between the drilling teeth 11. At that time, the inside of the cylinder is kept under vacuum even after the hole is formed. When the reuter 1 is moved backward, the air outlet 40 is located in the upper chamber of the holder 12, and the cylindrical interior includes the air outlet 40, the upper hollow part 14a, and the upper vent 1.
It is connected to the pressurizing side of the suction pump 54 via 6a, and pressurized air is fed into the cylindrical interior.

The incisal end 6 is blown away by the pressurized air.

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.

Furthermore, even if the incisal end gets caught in the suction holder or the drilling teeth, it can be easily removed.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an automobile showing the attachment portion of a door weather strip made of flexible material.
FIG. 2 is a perspective view of the door weather strip. FIG. 3 is a side view showing a conventional device. 4 to 9 show embodiments according to the present invention, with FIG. 4 being a perspective view and the others being sectional views. 10th
The figure is a sectional view showing an example of a suction holder used in the present invention. FIG. 6 is a conceptual diagram of a suction device constituting the apparatus of the present invention. 1... Reuter, 2... Drill, 3... Flexible material (weather strip), 4... Fastener mounting hole, 5... Air hole, 6... Incisal end, 7... Door mounting part, 8... ...Hollow seal lip, 10...Drilling device, 11...Drilling tooth, 12...Suction holder, 14...Hollow part, 14a...Upper hollow part, 1
4b...Lower hollow part, 16...Vent hole, 16a...
...Upper vent, 16b...Lower vent, 18...
Contact portion, 40...Air suction port, 42...Support rod,
52...Switching pump, 54...Suction pump.

Claims (1)

[Claims] 1. A drilling device for drilling a hole in a flexible material, equipped with a suction holder through which the drill passes for drilling, and communicating the suction holder with a means for controlling the internal pressure thereof; The control means switches and controls the pressure inside the suction holder so that negative pressure is applied to the tip of the drill before and during cutting of the flexible material by the drill, and pressurization is applied after cutting. A hole-making device characterized by: