JPS5835446Y2 - cutter knife in ring barker - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a new ring barker cutter knife for debarking logs.

Ring barker cutter knives generally have a fairly sharp cutting edge that can be used to strip the bark.

Although the cutter knife according to this invention is a ring barker, it generally belongs to cutter knives that tend to be cut off by striking.

When stripping foreign materials such as fir and Japanese tsuga, and domestic materials such as cedar and cypress, using a sharp cutter knife will damage the bark and reduce the value of the material.

Furthermore, bark with long fibers often gets entangled with a knife arm that rotates around the log, making it impossible to perform a smooth peeling operation.

Therefore, in this invention, the cutter knife is
Centering on the shaft in a direction generally perpendicular to the bark surface, at the tip there are three large-shaped protrusions, three prongs, three protruding rods, four cross-shaped protrusions, four protrusions, Four protruding rods are provided, and these cutter knives have rounded edges.

Also, if the bark scraped off by this cutter knife becomes entangled with the cutter arm,
The shaft portion of the cutter knife is rotatably attached to the holding portion of the arm.

This invention will be explained below according to the illustrated embodiments.

Figures 1a and Ib are views showing the side and front views, respectively, of a cutter knife 1 with a four-strip characteristic, and in Figure 1a, the knife 1 is attached to the holding part 3 of the cutter arm 2. It is rotatably mounted.

The cutter knife 1 has a shaft portion 4 at its base end, and is secured by a nut 5 to prevent the shaft portion from falling out of the holding portion 3.

Further, the tip of the knife has a round chevron-shaped protrusion with a cross-shaped protrusion 6, which is divided into quadrant-shaped protrusions 7.

The cutter arm 2 is rotated to the right in the figure while pressing the knife 1 against the bark.

As a result of this rotation, the four semicircular protrusions 7 on the right side in FIG. 1a come into contact with the bark, and the knife 1 rotates in accordance with the uneven distribution of friction with the bark to scrape and peel off the bark.

Figures 2a and 2b show a cutter with four wing-like protrusions.
FIG.
In figure a, the knife 1' is fixed to a holding part 3' of the cutter arm 2. In FIG.

The cutter knife 1' has a shaft portion 4' at its base end, and is non-rotatably fixed to a holding portion 3' of the cutter arm 2 by a nut 5.

Further, a cross-shaped wing-shaped protrusion 1' is provided at the tip of the knife.

The cutter arm 2 is rotated to the right in the figure while pressing the knife 1' against the bark.

As a result of this rotation, the wing-shaped projections 1' on the center and right sides of FIG. 2a come into contact with the bark, scraping and peeling it off.

The wings of the cross-shaped wing-like protrusion 7' in Figures 2a and 2b may be mounted at 45° with respect to the direction of rotation of the cutter arm.

Incidentally, the shaft portion 4 may be chamfered to prevent it from rotating.

Figures 3a and 3b show the side and front views, respectively, of a cutter knife 1 with four protruding bars in a cross-shaped position; in Figure 3a, the knife 1 is cutter·
It is rotatably attached to the holding part 3 of the arm 2.

The cutter knife 1 has a shaft portion 4 at its base end, and is secured by a nut 5 to prevent the shaft portion from falling out of the holding portion 3.

Furthermore, four protruding rods 7 are implanted at the tip of the knife.

The cutter arm 2 is rotated to the right in the figure while pressing the knife 1 against the bark.

As a result of this rotation, the protruding rod I on the right in Fig. 3a comes into contact with the bark, and the knife 1 rotates in accordance with the uneven distribution of friction with the bark, scraping and stripping the bark.

As mentioned above, according to the cutter knife of this invention,
It does not damage the skin of logs and is suitable as a barker for small-diameter trees. It can also be used on polished logs and other objects that do not want to be scratched. Even when stripping long-fiber bark, the peeled bark will not get entangled with the cutter arm. Never.

In the illustrated embodiment, the shaft of the knife is shown to be substantially perpendicular to the bark surface, but depending on the tree species, it may be attached to the cutter arm at a slight angle.

[Brief explanation of drawings]

Figures 1a, Ib, 2a, 2b and 3a. Each set of figures 3b is a side and front view of each of the three types of cutter knives of this invention, and each set of figures a is shown together with a part of the cutter arm. Symbol explanation, 1.1', 1: cutter knife, 2
: Cutter arm, 3.3': Knife holding part of cutter arm, 4.4': Knife shaft, 5: Nut,
6: Cross-shaped sex, T: 4 semicircular processes, 1': Cross-shaped pterygoid process, I〃: Cross-shaped process rod.

Claims (1)

[Scope of utility model registration request] A horizontal holding part is provided at the tip of the knife arm to hold the cutter knife in a removable and replaceable manner.
The knife has a shaft that passes through the holding portion, and the tip of the shaft has protrusions or features arranged in a cross or large shape centered on the shaft, and the edge of the blade is rounded. The cutter in the ring burger where the shaft part is rotatably attached or fixed to the holding part.
knife.