JPH0213125Y2 - - Google Patents

Description

[Detailed description of the invention] <<Purpose of the invention>><Field of industrial application> The present invention relates to a device for removing the outer skin of logs, and in particular relates to the structure of a knife responsible for the peeling action.

<Background of the invention> Ring barkers are often used as a means to remove the outer skin of logs. This is a system in which a large number of blades are arranged around a rotating ring, and the blades tend to approach the center of the ring.The logs are passed through these blades, and the blades cut the outer surface of the log in a spiral shape. It's something you try to peel off. By the way, in the case of this type of work, in the case of so-called external materials, the skin fibers are short and it is easy to strip them, but in the case of so-called internal materials such as cedar and cypress, which are typical,
Since the bark is long-fibered, the work was extremely difficult as the peeled bark would get tangled with the knife. For this reason, various improvements have been made to the structure of cutlery so that even such long-fiber bark can be peeled.

<Prior art and its problems> For example, one of them is the
15051 etc. exist. This is designed to further cut the stripped bark into short pieces by providing a cutting blade to prevent the bark from getting tangled.

However, with this method, the front of the knife,
In other words, the cutting edge provided on the surface where the cutter first starts contacting the raw wood that is the material to be processed (this is defined as the side surface in the explanation in the prior art) This may cause the tip to be excessively scraped off, resulting in a conical, pointed tip. As a result, there was a problem in that the usable length of the raw wood was further shortened and the product yield was lowered.

<Technical problem to be solved> The present invention was developed in view of the problems of the conventional technology, and aims to develop a cutter that does not cause cutting at the beginning of processing and can be applied to logs of all types. I tried it.

≪Structure of the invention≫ ≫〈Means for achieving the object〉 That is, the log peeling machine of the present invention passes the log through a rotating ring, moves the two relative to each other, and uses a cutting tool that is attached to the rotating ring and rotates while rotating. In the device for removing the outer skin of logs, the cutter has a plurality of peeling blades on the circumferential surface of a rotationally driven main body, and an annular guide on the front end surface perpendicular to the drive axis of the main body. It has a projecting edge, and is further provided with a release projection protruding from the outer peripheral end of the guide projecting edge rearwardly of the guide projecting edge, and the guide projecting edge is constituted by a separate member that is freely removable from the main body. This is an attempt to achieve the above object.

<Example> The present invention will be specifically described below based on the illustrated example. Reference numeral 1 denotes a raw wood debarking machine according to the present invention, and a material feeding device 2 is disposed before and after the debarking machine.
It supplies or discharges. This log peeling machine 1 is constructed such that a rotating ring 4 is attached to a machine frame 3, and a cutter 5 is attached to this rotating ring 4 via an arm 6. For example, three blades 5 are provided, which are arranged in a substantially toe-like shape, and are urged by a cylinder 7 so as to converge at the center of the rotating ring 4 at all times. Incidentally, since these basic configurations are common to ring barkers, further detailed explanations will be omitted. Next, the cutter 5, which has a characteristic structure of the present invention, will be explained. This knife has a main body 1 made of cast iron or the like.
0 is attached to the tip of the arm 6. Specifically, it is attached to the drive shaft 11 at this position, and is rotationally driven by the rotation of the drive shaft 11. A large number of peeling blades 12 are formed on the outer peripheral surface of the main body 10, and one of these blades is formed in a spiral ridge shape, for example. Of course, the stripping blade 12 itself may be formed into a block shape, a so-called buff-like shape made of bundled steel wires, or any other appropriate shape. Such a cutter 5 is configured so that the front end surface side perpendicular to the drive shaft 11 further protrudes beyond the area in which the skinning blade 12 is formed in the main body 10, and this is used as a guide ridge 13. This method of forming the guide flange 13 requires that it be formed separately from the main body 10 of the cutter 5. That is, the guide flange 1
3 is fixed to the main body 10 by a bolt 14, and by inserting and removing the bolt 14, the guide flange 13 can be attached, detached, and replaced. In short, it is sufficient for this guide edge to protrude sufficiently forward from the area where the skinning blade 12 is formed on the main body 10, but it is more preferable that the edge portion be formed smoothly into a taper or an arc shape. is desirable. The release protrusions 15 are formed at positions sufficiently far away from the guide ridge 13 toward the peeling blade 12, and these release protrusions 15 are provided at about four locations on the circumferential surface of the main body 10, for example. be. The attachment structure of this release protrusion 15 is that the insertion portion 16 is attached to the main body 10.
is recessed from the circumferential surface toward the center of the drive shaft, into which the central part of the piece-shaped release protrusion 15 is fitted, and the fixing bolt 14 screwed into the main body 10 from the guide flange 13 is passed through. It was designed so that it could be fixed in place.

The log peeling machine 1 according to the present invention has the specific structure described above, and the method for peeling the logs using this machine is as follows. First, the rotary ring 4 is driven in accordance with a conventional method, and the cutter 5 is rotated. Log A in this state
When the cutting tools 5 are fed into the center of the rotating ring 4, the guide edges 13 of each blade 5 first come into contact with the log, and the convergence of each other spreads to almost the outer diameter of the log A without any cutting action, and the log is placed in the center of the log. This allows A to be accepted. Log A when scolded
The skin a on the outer periphery is immediately scraped off by the peeling blade 12 without scraping off the tip of the skin. At this time, the release protrusion 15 acts to cut the epidermis a of the long fibers that have been scraped off, and performs the peeling action without the epidermis a becoming entangled.

<<Effects of the invention>> The present invention has the above-described configuration, and since the guide ridge 13 is formed on the front end surface of the cutter 5, the log
There is no effect of excessively scraping off the skin, and the peeling work can be performed with a high yield.

In addition, in the present invention, the guide flange 13 is connected to the main body 1.
0, it is possible to replace it when it wears out, and it is also possible to selectively attach the guide ridge 13 suitable for the properties of the raw wood.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall shape of a log peeling machine according to the present invention, FIG. 2 is a partially exploded perspective view of a cutter applied to the present invention, and FIG. 3 is a longitudinal sectional side view of the same. 1... Log peeling machine, 2... Material feeding device, 3...
Machine frame, 4... Rotating ring, 5... Blade, 6... Arm, 7... Cylinder, 10... Main body, 11...
Drive shaft, 12... Skin stripping blade, 13... Guide flange, 1
4...Bolt, 15...Release protrusion, A...Log, a...Skin.

Claims (1)

[Scope of utility model registration request] A device for removing the skin of the raw wood by passing the raw wood through a rotating ring, moving the two relatively, and removing the outer skin of the raw wood by a blade attached to the rotating ring and rotating while rotating, the blade being rotationally driven. The main body has a large number of peeling blades on the circumferential surface, and the front end face perpendicular to the drive shaft of the main body has an annular guide ridge, and further behind the guide ridge is an outer peripheral end of the guide ridge. 1. A log peeling machine, comprising a releasing protrusion that protrudes further, and the guide flange is constituted by a separate member that is removable from the main body.