JPS6127691Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a chipper for cutting wood chips.

A plurality of cutting blades are attached to the rotor in a substantially radial arrangement, a receiving blade is provided at the tip of the wood supply gutter that faces the rotation trajectory of the cutting blades in front of the rotor, and the wood is cut by the cutting blades and the receiving blade. Chitzpah is commonly known.

Conventionally, the chipper blade structure as described above has a cutting blade attached to the rotor, and a receiving blade provided at the tip of the supply trough at the same height as the bottom sliding surface of the supply trough.

In this way, when the sliding surface of the supply gutter and the cutting edge of the receiving blade are at the same plane height position, when the cutting blade cuts into the wood, as shown in FIG. 5, at the tip of the receiving blade 21, The wood A is dented by the biting of the cutting blade 22, and the rear end of the wood tries to rise using the cutting edge of the blade 21 as a fulcrum. This tendency becomes more pronounced as the wood becomes thinner.

When the wood is thin and the length of the wood becomes short, the wood is drawn between the rotating drum and the receiving blade, which not only increases the number of defective products but also causes the problem that chips of uniform length cannot be obtained.

This idea was made to solve the problems mentioned above, and by forming the cutting edge of the receiving blade higher than the sliding surface of the supply gutter, it is possible to produce chips of uniform length even with thin wood. The purpose is to provide a chipper that can cut into pieces.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, the chipper has a rotor 2 rotated within a casing 1 arranged in an inclined manner.
A supply gutter 3 for wood A is faced in front of the rotor 2, and a plurality of cutting blades 4 are provided on the rotor 2, and a receiving blade 5 is provided at the tip of the feed gutter 3.

To attach the cutting tool 4 to the rotor 2, a plurality of mounting holes 6 are provided in the rotor 2 in the form of long holes parallel to the radial axis of the rotor 2. With the wide cutting blade 4,
The blade edge 4a is fixed to the front surface of the rotor 2 so as to protrude by a predetermined length.

The receiving blade 5 provided at the tip of the supply gutter 3 is provided in an inclined shape such that the surface thereof becomes higher gradually toward the blade edge 5a so that the blade edge 5a is higher than the bottom sliding surface 3a of the supply gutter 3. There is.

FIG. 2 shows a first example of the receiving blade 5, which has a structure in which a separate receiving blade 5b is attached with bolts 10 to the upper surface of a tool rest 9 fixed to the lower part of the supply gutter 3.

A second example of the receiving blade 5 shown in FIG. 3 is formed integrally with a sliding plate 11 attached to the bottom of the supply gutter 3, and the surface of the sliding plate 11 is sloped toward the tip. A cutting edge 5a is formed at the tip.

The chipper of this invention has the above-mentioned configuration, and when the drum 2 is rotated while the wood A is fed and pushed into the supply gutter 3, the lower tip of the wood A is supported by the edge 5a of the receiving blade 5. Then, the portion protruding from the cutting edge 5a is sequentially cut into chips by each rotating cutting tool 4.

During the above-mentioned cutting, the wood A supplied onto the supply gutter 3 is supported on the tip side by the cutting edge 5a of the receiving blade 5, as shown by the dashed line in FIGS. In this state, it is cut into chips.

Therefore, as shown in Fig. 4, even if the wood A is thin, it is supported in an inclined manner with the tip side higher, so when the cutting blade cuts into the material, even if the wood is dented at the tip 5a of the receiving blade. Since the rear end of the wood does not float up, the wood is not drawn in between the drum 2 and the receiving blade 5, and the wood is always cut into chips of uniform length.

As described above, according to this invention, a receiving blade is provided at the tip of the supply gutter that supplies wood toward the drum,
Since the cutting edge of this receiving blade is set higher than the bottom sliding surface of the supply gutter, the wood on the feeding gutter is cut into chips while being held in an inclined state with the tip side lifted by the receiving blade. Therefore, even if the wood is dented by the tip of the receiving blade when the cutting blade cuts into the wood, the rear end of the wood will not float up, and even thin wood will be pulled in the direction of rotation of the drum during cutting. There is no such problem, and the effect is that even thin wood can be carved into chips of uniform length.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the chipper according to this invention, Fig. 2 is a longitudinal sectional view showing a first example of the main part of the above, Fig. 3 is a longitudinal sectional view also showing a second example, and Fig. 4 The figure is a longitudinal sectional view showing the chip cutting state in the first example, and FIG. 5 is a longitudinal sectional view showing the chip cutting state in the conventional chipper. 2 is a drum, 3 is a supply gutter, 3a is a sliding surface, 4 is a cutting blade, 5 is a receiving blade, 5a is a cutting edge, and 11 is a sliding plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a chipper in which a wood supply gutter faces the front of the rotor to which a cutting tool is attached, the receiving blade provided at the tip of the feed gutter is moved so that the cutting edge slides in the feed gutter. A chipper characterized by being formed in an inclined shape that is higher than the surface. (2) The tipper according to claim 1 of the utility model registration, wherein the receiving blade is formed by tilting the tip of the sliding plate upward. (3) The tipper according to claim 1 of the utility model registration, wherein the receiving blade is formed by a separate receiving blade attached to the tip of the sliding plate.