JPH0348003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chip crushing device in a desk-type chipper.

Generally, chips are cut out by a chipper and then sorted by a sorting device to remove small pieces and large pieces, and large pieces must be reprocessed to make them into standard sizes.

Especially when cutting large-diameter materials with a large desk chipper, increasing the rotational speed of the disc, that is, the cutting speed, will significantly increase the cutting resistance and impact.
In order to improve this problem, reducing the cutting speed and widening the cutting edge width will reduce the impact, but will worsen cracking and produce wide chips.

When the amount of reprocessing increases, the reprocessing equipment becomes larger and costs increase, and the amount of waste generated also increases.

As a means to improve these drawbacks, it has been proposed to attach a large number of narrow rotary blades to the desk, or to attach a protrusion to the back blade.

However, with the former, machining the desk and installing the rotary blade is troublesome, and with the latter, the resistance increases during cutting, causing the wood to rebound and become unstable, resulting in fluctuations in the length of the fibers of the chip that is cut out, making it difficult to install. I couldn't get any good chips.

The present invention improves the above-mentioned drawbacks by automatically dividing the wide chips cut by the rotary blade and released to the other side of the disk into pieces by colliding with the crushing protrusions protruding from the inner surface of the casing. It was designed to do so.

The embodiment shown in the drawings will be explained below.1
is a casing that supports a main shaft 2 and has a material input cylinder 3 on one side wall 1a, and a V-pulley 4 attached to the main shaft 2 is driven by a motor 8 via intermediate pulleys 5, 6 and V-belts 7a, 7b. Rotationally driven.

The disk 9, which is supported in the casing 1 by the main shaft 2, has a plurality of cutter attachment holes 10...
are bored in a radial or spiral shape, and the rotary blade 11 is fixed to the slope of the blade attachment opening 10 with a screw 13 along with the presser blade 12,
The blade plate 14 is connected to the blade mounting port 10 by screws 15...
It is screwed onto the side of the.

Further, a sliding plate 16 is attached to the lower inner surface of the base of the material feeding cylinder 3, and a receiving blade 17 is provided at the lower part of the sliding plate 16.

Furthermore, the inner surface of the other side wall of the casing 1, that is, the side wall 1b facing the material input cylinder 3, is designed to receive and break a part of the wide chips carved out by the rotary blade 11 and the receiving blade 17. A large number of crushing protrusions 19' (hereinafter referred to as protrusions) are provided upright, and the protrusions 19' may be provided integrally with the casing 1, but the protrusions 19' are provided on one side of the seat plate 19,
As shown in FIG. 3a, the protrusion 19' is inserted into a hole drilled near the axis of the side wall 1b at a portion facing the receiving blade 17 (approximately half the width of the material input tube) and moved inward. The seat plate 19 is screwed onto the outer surface of the side wall 1b, or the side wall 1b is fixed as shown in FIGS. 1 and 3b.
As shown in the figure, a notch window 20 that faces the axis side of the receiving blade 17 and is long vertically is bored, and this notch window 20
A bolt 2 is fitted with a plate 21 having a protrusion 19' protruding from its inner surface, and the mounting plate 21' is screwed onto the outer surface of the side wall, or the bolt 2 has a protrusion 19' at its tip.
2 may be screwed into the same position as in the above-mentioned example, and the protrusion 19' may be replaced when it wears out.

Furthermore, as shown in FIGS. 1 and 5, on the side of the inner circumferential surface 1c of the casing 1 facing about half of the axis side of the receiving blade 17 and on the side from which the chip is cut out, as shown in FIG. 1 and FIG. The protrusion 19' is provided by suitable means.

In the above-described apparatus, when wood is inserted through the material input port 3 and the disk 9 is rotated, the cutting blades 11 cut the wood to a predetermined thickness as shown in FIG.

At this time, since the rotation speed on the outer circumferential side of the disk 9 is high, a large crack occurs in the chip and the chip collides with the inner surface of the casing, resulting in an appropriate size. Since the chip is small, the back crack is small and the chipping speed is also low, so it is likely to be ejected as a wide chip as shown in FIG. It collides with the raised protrusion 19' and receives a local impact, so it is broken into pieces of appropriate length, which are then sent from the throwing tube 23 to the conveyor 2.
4 will be introduced.

In addition, in the above example, the protrusion 19' is connected to the side wall 1b.
Although it is provided on both the inner surface and the inner circumferential surface 1c, it may be provided on only either one.

In the present invention, as described above, a disk equipped with a rotary blade is pivotally supported in a casing, and a piece of wood inserted through a material input tube provided on one side wall of the casing is provided at the base of the rotary blade and the material input tube. The chipper is configured to cut using a receiving blade, and the inner surface of the casing at a portion corresponding to the receiving blade receives and breaks a part of the wide chip cut by the rotating blade and the receiving blade. Since the structured crushing protrusion is erected, even if a wide chip mass is produced by cutting a large diameter tree at a relatively low speed with a desk-type chipper, when it is thrown from the blade attachment port, the crushing protrusion will be removed. It can be crushed into appropriate size at the same time as cutting.

Therefore, the number of chips larger than the standard size is very small, and unlike conventional methods, excessive equipment and labor are not required for reprocessing. Moreover, the amount of waste generated is significantly reduced, and high-quality chips can be produced at a high yield. be able to.

In addition, good chips can be obtained without overloading or causing the wood to become timid and reducing the cutting length, unlike the case where the back blade is provided with a protrusion.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Figure 1 is a side view of the chipper, Figure 2 is a cross-sectional view of the main part, Figure 3 a, b, and c are cross-sectional views showing examples of how protrusions are attached, and Figure 4 is a cutting edge from the center of the cutting blade. FIG. 5 is a sectional view taken along line AA in FIG. 1. 1...Casing, 3...Material input port, 1a,
1b... Side wall, 9... Disc, 10... Blade attachment port, 11... Cutting blade, 18... Crushing protrusion.

Claims (1)

[Claims] 1. A disk equipped with a rotary blade is pivotally supported in a casing, and wood inserted through a material input tube provided on one side wall of the casing is inserted by the rotary blade and a receiving blade provided at the base of the material input tube. In the chipper configured to cut chips, a crushing protrusion configured to receive and break a part of the wide chip carved out by the rotating blade and the receiving blade is provided on the inner surface of the casing at a portion corresponding to the receiving blade. A crushing device in a chipper characterized by being installed vertically.