JPS5912165Y2 - Portable electric planer chip discharge device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a chip dislodging device for a portable electric planer.

In general, the chip discharge device of a portable electric planer is shown in Fig. 1.
As shown in FIG. 2, there is a gap 3 that communicates between the planer barrel chamber 8 formed in the planer body 1 and the chip cylinder 9 provided on the upper part of the planer barrel chamber 8, the chip cylinder 9, and the chip cylinder. 9 and a chip discharge port 11 formed laterally.

Chips cut by the blade 7 fixed to the planer barrel 6 rotatably installed in the planer barrel chamber 8 are scattered by centrifugal force and come into contact with the guide surface 5 of the front base 4. Due to its own inertia and the wind generated by the planer barrel 6, the chips pass through the gap 3 and enter the chip cylinder 9.

Then, the arrow 16 of the fan 14 is guided by the air passage 13 formed by the housing 2 and the end bracket 12.
It is blown away by the wind in the direction and is discharged from the chip discharge port 11 of the chip cover 10.

Note that the gap 3 is formed between the housing 2 and an end surface 21 of the partition wall 20 that partitions the solid barrel chamber 8 and the chip cylinder 9.

In the conventional portable electric planer chip discharging device described above, the chips cut by the blade 7 are scattered over a wide range of directions as shown in FIG.

That is, with dry wood, chips fly almost in the direction of the circumferential connection immediately after cutting, and with wood with a high moisture content, wood with a large amount of resin, or wood with strong fibers, it is difficult to remove chips from the wood particles, and the 7th surface of the blade flies. Since the detachment of the scrap becomes difficult, immediately after cutting, the scrap rotates by an angle θ, flies in the circumferential connecting direction, and then hits the guide surface 5 of the front base 4 and bounces back.

For this reason, the chips get caught up in the rigid barrel chamber 8, impairing the finished surface of the wood, and the chips clog the gaps 3, impairing workability.

In order to prevent this, the size of the gap 3 is made large, but as a result, if the operator carelessly inserts his finger 15 into the chip discharge port 11 of the chip cover 10, the finger 15 may enter the planer barrel chamber 8. There is a danger that the blade 7 may come into contact with the blade 7.

In order to prevent this danger, if the lateral dimension W of the chip cover 10 in FIG. There were no drawbacks.

The purpose of the present invention is to provide a chip discharge device for a portable electric planer that eliminates the above-mentioned drawbacks, improves safety without reducing chip discharge ability, and allows the planer main body to be made smaller. .

The chip discharging device for a portable electric planer of the present invention has a planer barrel chamber in which a rotatable planer barrel with a blade fixed thereto, and a partition wall interposed in the upper part of the planer barrel chamber is installed on the side. a chip cylinder having a chip discharge port; and a gap formed between the end surface of the partition wall and the inner wall of the housing and provided above a guide surface that is fixed to the front base and guides the chips cut by the blade. The above-mentioned gap is formed to have a predetermined dimension L2 on the chip cylinder side, and the dimension L1 on the planer barrel side is set to L1>L2, and the above-mentioned L2 dimension is set to A of the planer barrel external dimension. It takes the form below.

An embodiment of the chip discharging device for a portable electric planer according to the present invention will be described below with reference to FIGS. 4 and 5, with the same parts as those in the prior art designated by the same reference numerals and explanations of the same parts omitted.

A partition wall 20 provided between the planer barrel chamber 8 and the chip cylinder 9
Regarding the dimensions of the gap 3 between the end face 21 of the partition wall 20 and the housing 2, the dimension L2 of the gap 3 on the chip cylinder side of the end face 21 of the partition wall 20 is the outer dimension of the planer barrel 6 (the outer diameter dimension of the planer barrel of a portable electric planer is 40 mm (approximately 40 mm) or less, and the dimensions are such that even if an operator tries to insert his/her finger into the gap 3 from the chip discharge port 11 side, it will not be possible or difficult to do so.

The dimension L1 on the planer barrel 6 side of the gap 3 is the guide surface 5.
The size is the same as the conventional one to prevent chips scattered by the plane from entering into the plane barrel chamber 8, and therefore, the shape is such that L2<L1.

For this reason, the end surface 21 of the partition wall 20 is opened on the plane barrel chamber 8 side (the entrance side of the gap 3) and is shaped into an inclined surface.

Since the gap 3 is shaped like this, even if you try to insert your finger into the gap 3, the part of the gap 3 on the chip cylinder 9 side will cause your finger to get stuck in the barrel chamber 8 side, as shown in Figure 4. Since there is no or it is difficult to enter the blade 7, the risk of fingers coming into contact with the blade 7 can be reduced.

Furthermore, when the chips pass through the gap 3, the speed S1 of the chips that starts entering from the planer barrel chamber 8 side gradually increases, and the speed S2 when the chips pass through the chip cylinder 9 side is S2-S1・L1/ L2
It becomes larger and its ability to blow away increases.

Therefore, the chips can be guided to the cylinder 9 without clogging the gap 3 with chips, and the chips can be guided to the chip discharge port 19 by the wind in the direction of the arrow 16 of the fan 14 without reducing the chip discharge ability.
It can be discharged from

Since fingers can be prevented from coming into contact with the blade 7, there is no need to protrude the chip cover 10 laterally, and it is possible to prevent the planer main body from increasing in size.

In this way, the chip discharging device for a portable electric planer according to this embodiment improves safety by reducing the gap size on the chip cylinder side without reducing the chip discharging ability, and also improves safety by reducing the size of the gap on the chip cylinder side without reducing the chip discharge capacity. You can prevent it from taking shape.

Further, by reducing the size of the gap on the chip cylinder side, the ability to blow away chips in the gap portion can be increased, and the gap will not be clogged with chips.

FIG. 6 shows another embodiment, in which the narrowed dimension L2 of the gap 3 of the end face 21 having an inclined surface is such that the depth dimension W' from the chip discharge port 11 is within the reach of the finger 15, and The portion has a larger size on the chip cylinder 9 side, and has the same effect as the above embodiment.

As described above, the chip discharging device for a portable electric planer according to the present invention has the effect of improving safety without reducing the chip discharging ability and also being able to be made smaller.

[Brief explanation of drawings]

Fig. 1 is a side view showing a part of a conventional portable electric planer in cross section, Fig. 2 is a cross-sectional plan view of Fig. 1, and Fig. 3 is an enlarged sectional view taken along the line III-III in Fig. 2. , FIG. 4 is a detailed cross-sectional view of the same part as FIG. 3 of an embodiment of the chip discharge device for a portable electric planer of the present invention, and FIG. 6 is a sectional view of the same part as FIG. 5 of another embodiment of the chip discharging device for a portable electric planer according to the present invention. DESCRIPTION OF SYMBOLS 1... Planer body, 2... Housing, 3... Gap, 4... Front base, 5... Guide surface, 6... Planer body, 7... Blade, 8...・Planer trunk chamber, 9・
... Chip tube, 11... Chip discharge port, 20... Partition wall, 21... End surface.

Claims (1)

[Scope of utility model registration request] A planer barrel chamber in which a planer barrel to which a blade is fixed is rotatably installed; a chip cylinder provided at the top of the separate planer chamber with a partition wall interposed therebetween and having a chip discharge port on the side; and a front base. A gap formed between the end face of the partition wall and the inner wall of the housing, which is provided above a guide surface that is fixed and guides the chips cut by the blade, the partition defining the gap. At least one of the wall end surface and the inner wall of the housing is formed into an inclined surface so that the dimension L2 of the gap on the chip cylinder side is smaller than the dimension L1 of the gap on the barrel chamber side, and
A chip discharging device for a portable electric planer, characterized in that the chip cylinder side dimension L2 is less than or equal to the outer diameter h of the planer barrel.