JPS6130805Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drum chipper that can input and cut wood, for example, hardwood and softwood, and simultaneously produce wood chips for each type of wood.

Generally, when producing pulp from wood chips that are a mixture of hardwood wood (hereinafter referred to as L wood) and softwood wood (hereinafter referred to as N wood), the L wood chips and N wood chips are subjected to a grinding process. Because the pulping treatment conditions such as cooking treatment are significantly different, only pulp with extremely poor quality and yield can be produced. For this purpose, L-wood pulp and N-wood pulp are usually produced by separating L-wood chips and N-wood chips separately and subjecting each wood chip to pulp processing such as grinding and cooking under optimal conditions. ing.

By the way, these wood chips are mainly made by removing the bark from L and N wood felled in mountain forests using a bark stripping device such as a drum barker, and then processing the stripped wood using a disk chipper or drum chipper. It is manufactured by putting it into a chipper.

Conventionally, in order to manufacture L wood chips and N wood chips, (1) The felled wood is divided into L wood and N wood, stored in a wood storage yard such as a factory, and the N wood is processed using, for example, a bark stripping device. This stripped wood is then put into a wood chipper to produce N-wood chips, and then the same bark-stripping device is used to peel the bark of L-wood and this is put into the same wood chipper to produce L-wood chips.
Manufacturing wood chips (2) The felled wood is not immediately divided into L wood and N wood as in (1) above, but is stripped using a bark stripping device, and then the stripped wood is separated into L wood. Sort the wood into N wood and store it in storage, then use the wood chipper to first
(3) The L material and N material sorted as in (2) above are made into L material chips.
This was done using either of the methods described above, in which the material was put into a chipper exclusively for L material, and the N material was introduced into a chipper exclusively for N material, and the materials were cut in parallel to produce L material chips and N material chips, respectively.

However, methods (1) and (2) above require a vast lumber storage area, and method (3) above requires at least two
There was a problem in that a special chipper was required for the large size of the table, and there was also a problem in that the wood chips produced were irregular in size.

The purpose of the present invention is to solve the above-mentioned problems all at once, and to produce thin, uniformly sized wood chips with numerous splits that are small in size, have extremely high cutting ability, and are highly suitable for pulping. The purpose of the present invention is to provide a drum chipper for simultaneous cutting of different types of wood.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the drum chipper for simultaneous cutting of different types of wood according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is a plan view of an embodiment of the drum chipper for simultaneous cutting of different wood types according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a drum chipper for simultaneous cutting of different wood types according to the present invention. It is a perspective view of the rotating drum part of another Example of a drum chipper.

In the drawings, reference numeral 1 denotes a rotating drum fixed to a rotating shaft 2 that is horizontally supported by a bearing (not shown) and rotated at high speed by a drive device (not shown);
Reference numeral 10 denotes a hollow portion inside the rotating drum 1 that is partitioned left and right by a partition wall 102 and further divided into small chambers by ribs 104. Reference numeral 120 refers to a hollow portion on the outer peripheral surface 12 of the rotating drum 1 that communicates with the hollow portion 10 in the circumferential direction. Wood chip guide ports 122 are opened at a predetermined length (indicated by symbol a in FIG. 2) and at predetermined intervals, and 122 is a wood chip guide port opened at the end of the hollow portion 10 opposite to the partition wall 102. 3 is a discharge port, 3 is a sliding plate having a sliding surface 30 forming a predetermined inclination angle (indicated by symbol α in FIG. 2) with respect to a horizontal plane (indicated by dotted line X in FIG. 2), and 32 is a rotating drum. Partition wall 1 within 1
A partition plate 4 is provided on the lower end of the sliding surface 30 of the sliding board 3 to divide the sliding surface 30 of the sliding board 3 into different types of trees, and is located approximately on an extension line of 02.
A receiver blade 5 has a cutting edge spaced apart from the outer peripheral surface 12 by a predetermined distance (indicated by symbol b in FIG. 2); A cutting blade 52 fixed at a rear position (indicated by symbol y) is a predetermined length from the outer peripheral surface 12 of the rotating drum 1 (indicated by symbol c in FIG. 2).
The scooping surface 522 and the flank surface 524 are each protruded at a predetermined angle (indicated by symbol z in FIG. 2) with respect to a plane (indicated by symbol z in FIG. 2, the cutting edge of the cutting blade 5 is shown by symbols β and γ).

Since the present invention has the above-mentioned configuration, the longitudinal direction (fiber direction) is oriented toward the conveying direction by two wood conveying devices (not shown) such as belt conveyors whose conveying surfaces are ship bottom-shaped or V-shaped. The sent stripped L material and N material are separately charged into the left and right wood input ports 34 of the sliding plate 3, respectively. Then, those L and N materials fall onto the sliding surface 30 of the sliding plate 3 which forms an inclination angle α of 50 to 55 degrees with respect to the horizontal plane x, and slide down with the longitudinal direction of the L and N materials in the downhill direction. 200 to 400 by sliding down the surface 30 and using a driving device such as an electric motor (not shown).
The lower ends of the L material and the N material are supported by falling onto the outer circumferential surface 12 of the rotating drum 1, which is fixed with a key or the like to a rotating shaft 2 that is being rotated at high speed at a rate of rotations per minute. At this time, the sliding surface 30 of the sliding plate 3 is connected to a partition plate 30 that is located approximately on an extension line of the partition wall 102 in the rotating drum 1.
Since the materials are separated by , the L material and N material that are introduced will not mix.

In addition, it is preferable that the partition plate 32 is fixedly installed on the sliding plate 3.

The lower ends of the L material and N material are the outer peripheral surface 1 of the rotating drum 1.
The rotating drums 1 and 2 are respectively supported on the rotating drums 1 and 2
At the rear position of the wood chip guiding port 120 in the rotary drum rotation direction y, the cutting blade presser plate 54 is attached to the rotary drum 1.
The cutting blade 5, which is firmly fixed to the rotating drum 1 by the cutting blade tightening bolt/nut 540, is cut into the lower end portions of the L material and the N material, respectively.
At this time, the cutting edge 40 of the receiving blade 4 is viewed from the rotation center 14 of the rotary drum 1 at an inclination angle within the range of 10 to 15 degrees with respect to the horizontal plane If the cutting edge 5 is positioned below the outer circumferential surface 12 of the rotating drum 1 by a distance of 5 to
The scooping surface 522 and the flank surface 524 are protruded by a length within a range of 10 mm, and the scooping surface 522 and the flank surface 524 are connected to the cutting edge tip 52.
0 and the rotation center 14 of the rotating drum 1
The left and right sliding surfaces 30 of the sliding plate 3 form the above-mentioned inclination angle α with respect to the horizontal plane x. Since the L material and the N material are cut upward from their respective lower ends into wood chips having a substantially uniform fiber length L expressed by the formula L≒C/sin(90°-α), These cut wood chips are brought into contact with the scooping surface 522 of the cutting edge 52 of the cutting blade 5 and are approximately (90+
γ) When the wood chips are bent and guided through the wood chip guiding port 120 into the small chamber of the hollow portion 10, countless splits occur in the fiber direction of the wood chips, and the thickness in the direction perpendicular to the fiber direction becomes approximately 5. ~10m/m
The result is a wood chip with countless cracks in it. Further, when the cutting edge tip 520 of the cutting blade 5 is inclined at an angle of inclination (indicated by symbol ρ in FIG. 1) within the range of 3 to 10 degrees with respect to the direction of the rotating shaft 2 of the rotating drum 1, Not only can the load be dispersed when cutting wood, but also shearing force can be applied to the wood in the two directions of the rotating shaft, allowing extremely smooth high-speed cutting. It can be divided into widths of 10 to 40 mm in all directions.

As mentioned above, the wood chips that finally flow into the small chamber of the hollow part 10 of the rotating drum 1 are
The wood chips have a foot length of 16 to 18 mm, a width of 10 to 40 mm, and a thickness of 3 to 6 mm. These wood chips have a nearly uniform size that is optimal for the subsequent pulping process. It is.

By the way, the ribs 104 that partition the hollow portion 10 of the rotating drum 1 into small chambers are parallel to the rotating shaft 2 direction of the rotating drum 1 and are extending from the center of the rotating shaft 2 toward the outer circumferential surface 12, as shown in the embodiment of FIG. It may be in the form of a flat plate having a surface extending straight in the direction of the rotary drum 1, or in the form of a flat plate having a surface inclined in the direction of the rotation axis 2 of the rotary drum 1 and extending straight in the direction of the outer circumferential surface 12, but the embodiment shown in FIG. As shown in FIG. 2, it is preferable that the pipe has a curved surface so that the wood chips and air flowing in from the wood chip guide port 120 can smoothly flow out to the wood chip discharge port 122. This rib 1
If 04 has a curved surface, the rotating drum 1
Due to the high-speed rotation of the rib 104, the rib 104 acts as a powerful air blower and a chute for discharging wood chips, and removes dust such as wood powder and shavings generated when cutting wood, loading wood onto the sliding board 3, and sliding down the wood chips together with the air. The wood chips flowing in from the guide port 120 are forcibly sucked into the small chamber of the hollow part 10. The wood chips are smoothly discharged from the wood chip discharge port 122 together with the dust and air.
The discharged wood chips pass through hoppers (not shown) disposed directly below the wood chip discharge ports 122 that are open at both ends of the rotating drum 1, and are stretched directly below the exits of the hoppers. The chips fall onto the L-material chip conveyor and the N-material chip conveyor (not shown), and are sent to the next chipping process or a chip silo.

In addition, when the rib 104 has a curved surface shape as described above, the surface of the rib 104 is free from any adhesion of wood powder, chips, etc., and a strong exhaust air is always maintained. The number of wood chip guide ports 120 and cutting blades 5 opened on the outer circumferential surface 12 of the rotating drum 1 is preferably two or more on each of the left and right outer circumferential surfaces 12 with the partition wall 10 in between. It is most preferable to arrange them in a staggered manner when viewed from above the outer circumferential surface 12 in order to distribute the load during wood cutting. The outer diameter of the rotating drum 1 is 600~
The distance b from the outer circumferential surface 12 of the rotating drum 1 to the cutting edge 40 of the receiving blade 4 is about 5.3 to 10.5 mm, and the outer circumferential surface 12 of the rotating drum 1 and the partition plate 32 are approximately 1200 m/m.
The gap (indicated by symbol d in Figure 2) with the lower end of is 1
It is preferable to keep it as narrow as possible to about 2 mm.

The length of the cutting blade 5 may be approximately 100 to 200 mm, and the length of the wood chip guiding port 120 in the circumferential direction (indicated by symbol a in FIG. 2) may be approximately 20 to 30 mm. When the number of cutting blades 5 is 4 each in the range of 200 to 400 minutes/time, the maximum cutting capacity of the drum chipper for simultaneous cutting by wood species according to the present invention is 0.2 to 0.4 m ³ /min.

As detailed above, the drum chipper for simultaneous cutting of different wood species according to the present invention is small in size, but has extremely high cutting ability with low power consumption, and can produce wood chips of almost uniform size with high efficiency, which is ideal for various pulping processes. Not only can it be manufactured, but L and N materials can be cut separately and at the same time, which eliminates the need for a vast lumber storage area and two or more large dedicated chippers that were required in the conventional wood chipping process. It has many advantages such as being able to greatly simplify the wood chipping process, and its industrial utility value is extremely large.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the drum chipper for simultaneous cutting of different wood types according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a drum chipper for simultaneous cutting of different wood types according to the present invention. It is a perspective view of the rotating drum part of another Example of a drum chipper. 1... Rotating drum, 10... Hollow part, 102
... Partition wall, 104 ... Rib, 12 ... Outer peripheral surface,
120... Wood chip guide port, 122... Wood chip discharge port, 14... Rotation center, 2... Rotation axis,
3... Sliding board, 30... Downhill surface, 32... Partition plate, 34... Wood input slot, 4... Receiving blade, 40...
Blade edge, 5... Cutting blade, 52... Blade edge, 520...
Cutting edge tip, 522... scooping surface, 524... flank surface, 54... cutting blade presser plate, 540... bolt/nut, a... circumferential length of wood chip guiding port, b... rotating drum The gap between the outer circumferential surface of the rotating drum and the cutting edge of the receiving blade, c...Protrusion length of the cutting blade from the outer circumferential surface of the rotating drum, d... The gap between the outer circumferential surface of the rotating drum and the lower end of the partition plate, α...Inclination angle of the sliding surface of the sliding plate with respect to the horizontal plane, β...Angle between the scooping surface of the cutting blade and plane z, γ...Angle between the flank surface of the cutting blade and plane z, ρ...Cutting The inclination angle of the tip of the blade tip with respect to the direction of the rotation axis, η...The inclination angle of the receiving blade tip with respect to the horizontal plane as seen from the rotation center of the rotating drum,
x...horizontal plane, y...direction of rotation of the rotating drum, z
...A plane that includes the rotation center of the rotating drum and the cutting edge tip of the cutting blade.

Claims (1)

[Claims for Utility Model Registration] 1. It is fixed to a rotating shaft that is horizontally supported by bearings and rotated at high speed by a drive device, and the interior is partitioned left and right by partition walls and further divided into small chambers by ribs. It has a hollow part, and wood chip guide ports of a predetermined length in the circumferential direction are opened at predetermined intervals in the circumferential direction so as to communicate with the hollow part, and the ends of the hollow part opposite to the partition wall are respectively A rotating drum having an opening as a wood chip discharge port, and a receiving blade having a sliding surface forming a predetermined inclination angle with respect to a horizontal plane and having a cutting edge at a lower end thereof at a predetermined distance from the outer peripheral surface of the rotary drum. and a sliding plate having a partition plate for dividing the sliding surface by tree species on an extension line of the partition wall in the rotating drum, and a sliding plate fixed to the wood chip guide port of the rotating drum at a rear position in the rotating direction of the rotating drum. The cutting edge is made to protrude a predetermined length from the outer peripheral surface of the rotating drum, and the scooping surface and flank surface of the cutting edge are each at a predetermined angle with respect to a plane including the tip of the cutting edge and the center of rotation of the rotating drum. A drum chipper for simultaneous cutting of different types of wood, characterized in that it is equipped with a cutting blade that forms a shape. 2. Ribs that further divide the hollow portion divided left and right by the internal partition wall of the rotating drum into small chambers can facilitate the outflow of the wood chips and air that have flowed in from the wood chip guide port to the wood chip discharge port. A drum chipper for simultaneous cutting of different types of wood as set forth in claim 1 of the utility model registration claim, which has a curved surface. 3. The inclination angle of the sliding plate with respect to the horizontal plane is within the range of 50 to 55 degrees, and the scooping surface and flank surface of the cutting blade are each 70 to 55 degrees with respect to the plane containing the cutting edge tip of the cutting blade and the rotation center of the rotating drum. The drum chipper for simultaneous cutting by wood species according to claim 1 or 2 of the utility model registration claim, which is within the range of 90 degrees and 35 to 45 degrees. 4. A tree species-specific product according to any one of claims 1 to 3 of the utility model registration claim, in which the cutting edge protrudes from the outer circumferential surface of the rotating drum by a length within a range of 5 to 10 mm. Drum chipper for cutting. 5 Utility model registration claims Paragraphs 1 to 4, in which the receiving blade at the lower end of the sliding surface of the sliding plate has a cutting edge that is inclined downward within a range of 10 to 15 degrees with respect to the horizontal plane that includes the rotation center of the rotating drum. The drum chipper for simultaneous cutting by tree species as described in any one of the preceding paragraphs. 6 The cutting blade is 3~
The drum chipper for simultaneous cutting of different types of wood according to any one of claims 1 to 5 of the utility model registration claim, which has a cutting edge tip inclined within a range of 10 degrees. 7. The utility model according to any one of claims 1 to 6 of the claims for registration of a utility model, in which a partition plate is fixedly installed on the sliding board to classify the wood sliding down the sliding board by tree species. Drum chipper for simultaneous cutting of different tree species.