JPH0214882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chipper for manufacturing chips from raw wood and waste wood among pulp manufacturing equipment.

FIG. 1 shows an external view of a chipper, and FIG. 2 is a sectional view of a conventional chipper.

That is, the conventional chipper cuts logs d by attaching a fixed blade e to a desk b pivoted on a shaft a and rotating the shaft a via a driven sheave c. This conventional cutting method with a chipper requires a large amount of power because the log is sheared between fixed blades, and since it has a single blade, the size of the knife is large, and even if a part of the blade is chipped, the blade will not cut. Conventional chippers have various drawbacks, such as total loss, and the thickness t of the chips, as shown in FIG. 3, is uneven, which affects the degree of cooking.

The present invention corrects such drawbacks and includes:
A shaft is rotatably mounted on a drum fixed to a rotatably supported main shaft, a cutting head with an appropriate number of blades is fitted to one end of the shaft, and a pinion gear is fitted to the other end; Further, the pinion gear is rollingly meshed with a gear provided concentrically on the main shaft.

A first embodiment of the present invention will be described below with reference to FIG.

Fit the gear 2 to the base 1 and fix it with a key 3 or the like. The tip of a main shaft 4 passing through the center of the gear 2 is supported on the base 1 via an axle box 6 housing a bearing 5, and the base is supported on the gear 2 via a bearing 7. A drum 8 is attached to the main shaft 4.
A required number of cutting head shafts 9 are divided into equal circumferential parts and attached to the drum 8 via bearings 10. A pinion gear 11 that meshes with the gear 2 is fitted to one end of the shaft 9, and the other end is fitted with a pinion gear 11 that meshes with the gear 2. A cutting head 13 having an appropriate number of knives 12 attached to its circumferential surface is fitted into the cutting head 13 . In addition, the disk 15 having the through hole 14 of the cutting head 13 is inserted into the through hole 1.
4, the cutting head 13 is pivotally attached to the main shaft 4 so as to be exposed at the leading end side of the main shaft 4. Further, a sheave 16 is fitted to the exposed end of the main shaft 4, and a drive motor 17 is connected to the sheave 16.
are connected via belt 18. In the figure, 19 is a log insertion opening, and 20 is a gear cover fixed to the main shaft 4.

Next, when the drive motor 17 is rotated, the main shaft 4, drum 8, and disk 15 rotate together, and the cutting head 13 and pinion gear 11 are rotated.
revolves. Furthermore, since the pinion gear 11 meshes with the gear 2 and rolls, the cutting head 13
As it revolves, it also rotates. When a log is inserted from the log insertion port 19 in such a state,
Since the raw wood is cut by the revolution and rotation of the cutting head 13, the cutting efficiency is improved compared to the conventional method. Also, the thickness of the chip is determined by the revolution speed and rotation speed, and the chips can be made to have a uniform size.

FIG. 5 shows a second embodiment of the present invention,
The rotation speed of the cutting head 13 is further increased to further improve the cutting efficiency.

In the figure, the same components as in the first embodiment are indicated by the same symbols.

In the second embodiment, the main shaft 4 passes through the center of the gear 2 without contact, and the base of the main shaft 4 is supported on the base 1 via a bearing 21, and the gear 2 rotates via the bearing 25. It is freely supported by base 1, and sheave 2 is attached to the exposed end.
2 is fitted and connected to a motor 24 via a belt 23.

If the motor 24 is driven with this configuration and the gear 2 is rotated in a direction opposite to the rotational direction of the main shaft 4, the rotation speed can be increased and the cutting efficiency can be further improved.

In the above two embodiments, the cutting head has an appropriate number of knives attached to its circumferential surface, but it is also possible to have an appropriate number of knives radially attached to the front of the cutting head, like the cutter of a vertical milling cutter. Furthermore, the gear may be ring-shaped, teeth may be formed on the inner peripheral surface, and the gear may be disposed around the rotational outer circumference of the pinion gear.

As described above, according to the present invention, (i) the cutting efficiency is improved, so less driving force is required; (ii) the size of the chips can be made uniform, which improves the degree of cooking; and (iii) the cutting efficiency of the knife is improved. The cutting head can be replaced as a complete unit, reducing replacement time. (iv) The size of the knife can be small for large-diameter materials, reducing maintenance costs due to knife wear. (v) The number of knives in the cutting head can be reduced. By changing the thickness of the chip, the thickness of the chip can be freely selected.

[Brief explanation of drawings]

Fig. 1 is an external view of the chipper, Fig. 2 is a sectional view of a conventional chipper, Fig. 3 is an explanatory diagram showing the thickness of the chip, Fig. 4 is a sectional view showing the first embodiment of the present invention, FIG. 5 is a sectional view showing a second embodiment of the present invention. 2 is the gear, 4 is the main shaft, 8 is the drum,
9 is a shaft, 11 is a pinion gear, and 13 is a cutting head.

Claims (1)

[Claims] 1. A shaft is rotatably mounted on a drum fixed to a rotatably supported main shaft, a cutting head with an appropriate number of blades is fitted to one end of the shaft, and a pinion gear is fitted to the other end. A rotary blade type chipper, characterized in that the pinion gear is rollingly meshed with a gear provided concentrically on the main shaft.