JPS5935364Y2 - Router dust collection brush device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a router-dust collecting brush device.

Conventionally, a router-cutting machine is provided with a dust collecting brush device 1 as shown in FIG. 1 in order to prevent chips from scattering during cutting.

In the figure, reference numeral 2 denotes a dust collection cover, and a brush 3 is installed downward around the entire outer periphery of the cover.

The dust collection cover 2 has a dust collection port 2a on its circumferential surface for connection to a dust collection blower.

4 is a router bit, and 5 is a head to which this router bit 4 is attached.

6 is the material.

By providing the dust collection brush device 1 in this manner, the chips generated by cutting the router bit 4 are prevented from scattering by the brush 3 and are sucked into the dust collection blower from the dust collection port 2a.

However, since the suction pressure is strong in the part near the dust collection port 2a, the hairs of the brush 3 in the part near the dust collection port 2a are sucked into the dust collection port 2a side, as shown by the chain line in the figure, and the chips are sucked. There was a problem that it hindered the

Therefore, an object of this invention is to provide a router-dust collection brush device that can efficiently collect dust without causing the brush to be sucked into the dust collection port and hinder suction.

An embodiment of this invention is shown in FIGS. 2 to 4.

In the figure, 7 is a dust collection cover, the lower surface of which is open and a part of the circumference that has a dust collection lower a for connection to a dust collection blower.
have.

The router head 8 passes through a hole 7b in the dirt wall of the dust collecting cover 7, and a router bit 9 is attached to its lower end.

A brush 10 is installed downwardly over the entire outer circumference of the dust collecting cover 7.

The brush 10 is made of horse hair or the like, and the brush 10 is made of horse hair or the like.
It is hardened with a hardening agent to make it stronger.

The length of the bristles of the brush 10 is formed such that the circumferential portion 10b near the dust collection lower a is gradually shorter than the circumferential portion 10c farther away.

L is the difference in hair length. Further, the density of the bristles of the brush 10 is set such that the density of the long bristles 10c is higher than that of the short bristles 10b.

With this configuration, dust collection is performed as follows.

The direction in which chips are scattered during router machining can be in any direction within 360° depending on the direction of the chips, but when they fly in the direction of the short bristled part 10b of the brush 10 (in the direction of the arrow hole in Figure 4), the dust is scattered in the direction of the dust collection lower a. Since the direction is close to , the suction pressure is strong,
Therefore, even if the brush 10 is short and has a low density, it is strongly attracted directly to the dust collection lower a.

When chips fly in the direction of arrow B in FIG. 4, the suction force is weak, but the long, dense bristles of the brush 10 prevent them from flying outside, and they are sucked into the dust collection lower a.

In this way, dust can be collected reliably in any direction.

Moreover, since the part 10b of the brush 10 on the side of the dust collector 11]7a is short and has a low density, there is no waste of material.

Further, since the bristles of the portion 10b of the brush 10 on the dust collection lower a side are shortened, the bristles of the brush 10 do not bend toward the dust collection lower a side and obstruct suction.

Furthermore, since the planting part 10a of the brush 10 is hardened with a curing agent, even if the brush 10 descends deeply and is pressed against the material 6, the waist of the brush 10 does not bend.

As mentioned above, the router-dust collection brush device of this invention is
Since the brush becomes shorter as it approaches the dust collection port of the dust collection cover, the brush does not bend toward the dust collection port due to the strong suction force near the dust collection port and prevent suction, allowing efficient dust collection. Ru.

In addition, the brushes are long in the part far from the dust collection port, so even if the suction force is weak, the brushes will prevent the chips from flying away.This will prevent chips from flying in any direction around the circumference. This has the effect of reliably collecting dust.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a perspective view of an embodiment of the invention, FIG. 3 is a sectional view thereof, and FIG. 4 is a diagram illustrating its operation. 7...Dust collection cover 7a...Dust collection port,
9...Router pit, 10...Brush.

Claims (1)

[Scope of utility model registration request] A dust collection cover with an open bottom surface installed above the router bit and having a dust collection port for connecting to a suction device on a part of the peripheral wall; and a dust collection cover installed downward on the outer periphery of the dust collection cover to surround the router bit. A router-dust collection brush device comprising: a brush formed such that the length of the bristles in a circumferential portion near the dust collection port is gradually shorter than the length of the bristles in a portion further away from the dust collection port.