JP2018008381A - Wood chip manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood chip manufacturing device capable of reliably manufacturing cut chips without producing pin chips when a wood material has become short as a result of advancement of cutting or even when it is originally short.SOLUTION: A sliding plate 20 is provided for guiding so that wood material W' freely movable between a feed roller 7 therefor and a cutting rotor 4 advances straight by preventing rotation in lateral direction in parallel with a chipper knife 12 by separating from the feed roller 7 since the length of the wood material has become short as a result of advancement of cutting or since the wood material is originally short. A regulation bar 25 is provided for regulating movement in longitudinal direction in response to cutting of the wood W' guided by the sliding plate 20 with the chipper knife 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wood chip manufacturing apparatus that manufactures wood chips used for, for example, biomass power generation or pulp production, and in particular, wood that cuts wood such as felled trees and pruned branches with a cutting tool to manufacture cutting chips. The present invention relates to a chip manufacturing apparatus.

  Generally, wood chips are divided into two types: cutting chips and crushing chips (pin chips). The cutting tip is mainly obtained by mechanically cutting with a blade, and is a roughly square flake-shaped (caramel-shaped) chip. The pin tip is obtained by crushing mainly by mechanical hitting such as a hammer crusher, and is an elongated pin-like piece of wood.

  As a conventional wood chip manufacturing apparatus for manufacturing a cutting chip, there is one having a configuration including a cutting rotor to which a chipper knife is attached (for example, see Patent Document 1). This type of wood chip manufacturing device rotates a cutting rotor with a chipper knife mounted thereon, and cuts the wood with a chipper knife by feeding the wood straight with a feed roller so as to be perpendicular to the chipper knife toward the cutting rotor. Cutting tips are manufactured.

JP 2014-58044 A

  As shown in FIG. 4 (a), when the wood W carried into the machine by the carry-in conveyor 101 is relatively long, the wood W is pressed against the carry-in conveyor 101 by the feed roller 102 and the cutting is performed with the carry-in conveyor 101. The wood W is forcibly sent out on a sliding plate 104 disposed between the rotor 103 and the wood W is cut by a chipper knife 106 from an end thereof, and the cut wood piece is fixed with a fixed blade 105 fixed to the sliding plate 104. It is discharged from the gap of the cutting rotor 103. In the cutting operation in this case, as shown in FIG. 5 (a), the axis of the wood W is perpendicular to the blade of the chipper knife 106, and the wood W is cut in a direction intersecting the wood fiber direction to obtain a cutting tip and Become.

  As shown in FIG. 4B, the wood W ′ (wood end portion) whose length has been shortened by cutting with the chipper knife 106 or the wood W ′ (end roller) having a short length from the beginning is fed. When the paper is fed onto the sliding plate 104 between the feed roller 102 and the cutting rotor 103 apart from the roller 102, the pressing by the feed roller 102 does not work, so the wood W ′ can move freely and run wild. The direction is not fixed. In a severe case, the wood W ′ is rotated 90 ° in the lateral direction to be parallel to the cutting rotor 103, and the axis of the wood W ′ is parallel to the tip of the chipper knife 106 as shown in FIG. Instead of being cut in a direction intersecting the wood fiber direction, it is cut in parallel with the wood fiber direction, resulting in an elongated pointed pin tip.

  Even if the wood W ′ is fed straight into the cutting rotor 103 without rotating 90 ° in the lateral direction, the pressing force by the feed roller 102 is not effective, so that the cutting force from the chipper knife 106 on the wood W ′. Is added, as shown in FIG. 5C, the rear end side of the wood W ′ is flipped upward, or as shown in FIG. 5D, the wood W ′ is caused by the reaction force during cutting. The front end side of the door is flipped upward. Thus, when the wood W ′ moves in the vertical direction as it is cut by the chipper knife 106, the axis of the wood W ′ does not become perpendicular to the blade of the chipper knife 106, and the wood W ′ is the original wood fiber. Since it is not cut in a direction crossing the direction, it becomes a pin tip. Further, when the wood W ′ moves in the vertical direction, the posture becomes unstable, and the wood W ′ rotates 90 ° in the horizontal direction and is cut in a state as shown in FIG. Sometimes.

  As described above, in the conventional wood chip manufacturing apparatus, even when trying to manufacture a suitable cutting chip used for biomass power generation or pulp manufacturing, when a wood end portion or an end roller is fed as wood to be cut, a pin chip is used. May be produced. In addition, since a pin chip | tip causes the conveyance trouble in the case of biomass power generation, it processes again and is cut | disconnected small for cutting chips. For this reason, the number of extra steps increases, resulting in a decrease in productivity.

  The present invention has been made in view of the above-mentioned problems, and even when cutting progresses and the wood becomes shorter, or even when the wood is short from the beginning, the cutting tip is surely manufactured without becoming a pin tip. It is an object of the present invention to provide a wood chip manufacturing apparatus that can be used.

In order to achieve the above object, a wood chip manufacturing apparatus according to the present invention comprises:
A cutting rotor with a chipper knife mounted thereon is rotated, and the wood is cut with the chipper knife by feeding the wood straight with a feed roller so as to be perpendicular to the chipper knife toward the cutting rotor to produce a wood chip. In the wood chip manufacturing apparatus as described above,
Freely move between the feed roller and the cutting rotor away from the feed roller because cutting with the chipper knife has advanced and the length of the wood has become shorter or because the length of the wood is shorter from the beginning And a guide member for guiding the timber to move straight so as to prevent the timber from rotating sideways so as to be parallel to the chipper knife, and the wood guided by the guide member is cut by the chipper knife. Accordingly, there is provided a restricting member for restricting movement in the vertical direction (first invention).

  In the present invention, the guide member has an upper surface having a size capable of riding on wood that can move freely between the feed roller and the cutting rotor apart from the feed roller. Grooves that extend in the feed direction of the wood and that can be fitted with the bottom of the wood are formed in multiple rows at a predetermined pitch in the lateral direction, and extend linearly in the feed direction of the wood on both sides of each groove and contact the outer peripheral surface of the wood. It is a plate-like sliding plate formed with a contactable peak portion, and the regulating member is horizontally mounted in parallel with the axis of the cutting rotor at a position slightly higher than the wood fed onto the sliding plate. Thus, it is preferable that the bar is a bar-shaped regulating bar disposed between the cutting rotor and the feed roller (second invention).

  According to the wood chip manufacturing apparatus of the present invention, because the cutting with the chipper knife is advanced and the length of the wood is shortened or the length of the wood is short from the beginning, the feed roller and the cutting rotor are separated from the feed roller. Even if it is wood that can move freely between the two, it is guided by the guide member so as to proceed straight without rotating sideways so as to be parallel to the chipper knife, and is guided by this guide member. As the wood is cut by the chipper knife, it is restricted by the restricting member from moving in the vertical direction, so that the wood axis is perpendicular to the tipper knife blade and the wood is cut in a direction that intersects the wood fiber direction. Thus, the cutting tip can be manufactured reliably.

  Further, by adopting the configuration of the second invention, it is possible to guide the wood that can move freely between the feed roller and the cutting rotor away from the feed roller so as to advance straight, or to move in the vertical direction. Can be achieved with a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the internal structure of the principal part of the wood chip manufacturing apparatus which concerns on one Embodiment of this invention, (a) is a state figure which cuts comparatively long wood, (b) is a state which cuts comparatively short wood FIG. It is a figure which shows a sliding board, (a) is a whole perspective view in the state to which the fixed blade was attached, (b) is the sectional view on the AA line of (a). It is a figure explaining the function of the control bar with which the wood chip manufacturing apparatus was equipped, (a) is a state figure which controls the vertical movement of the wood at the time of cutting, (b) is the state of the wood by the reaction force at the time of cutting It is a state figure which regulates the motion of the vertical direction. It is a side view which shows the internal structure of the principal part of the conventional wood chip manufacturing apparatus, (a) is a state figure which cuts comparatively long wood, (b) is a state figure which cuts comparatively short wood. It is a figure which shows the behavior of the wood at the time of the cutting by the conventional wood chip manufacturing apparatus, (a) is the case where the axis of the wood is perpendicular to the blade of the chipper knife, (b) is the axis of the wood is parallel to the chipper knife. In this case, (c) is a case where the rear end side of the wood is flipped up, and (d) is a case where the front end side of the wood is flipped up.

  Next, specific embodiments of the wood chip manufacturing apparatus according to the present invention will be described with reference to the drawings.

<Outline explanation of wood chip manufacturing equipment>
The wood chip manufacturing apparatus 1 shown in FIG. 1 (a) mainly includes a carry-in conveyor 2, a feed roller device 3, a cutting rotor 4, and a casing 5 that houses the feed roller device 3, the cutting rotor 4, and the like. The round bar-shaped wood W carried into the casing 5 from one side in the horizontal direction to the other side by the conveyor 2 is sent straight out toward the cutting rotor 4 while being sandwiched between the carry-in conveyor 2 and the feed roller device 3. The wood rotor is cut and broken into pieces by the cutting rotor 4 to produce wood chips.
In the following description, the feed direction of the wood W (the right direction in FIG. 1A) is the front direction, the left-right direction toward the feed direction of the wood W is the lateral direction, and the feed direction of the wood W is directed. The vertical direction is the vertical direction.

<Description of the carry-in conveyor>
The carry-in conveyor 2 is a carry-in conveyor having an iron crawler belt plate on a conveyor chain 6 arranged so as to form an endless track between a hopper (not shown) and the cutting rotor 4, and is conveyed by a carry motor (not shown). When the chain 6 is driven, the wood W placed on the iron crawler belt plate mounted on the conveyor chain 6 by being fed through a hopper (not shown) is conveyed to the cutting rotor 4 while being supported from below. It is configured as follows.
In addition, as the carry-in conveyor 2, for example, the wood W is transported by a simple drag chain, the wood W is transported by a rubber belt or the like, and the wood W is used by using an inclined chute. The thing conveyed using a gravity effect etc. is mentioned.

<Description of feed roller device>
The feed roller device 3 includes a feed roller 7 in which a plurality of blades 7b are fixed to the outer peripheral portion of a roller body 7a, and a base end portion attached to both side walls of the casing 5 via a pivot shaft 8 so that the tip side is vertically And a swing arm 9 that can swing.
The feed roller 7 is rotatably attached to the tip end portion of the swing arm 9 via a rotation support shaft 10 and can swing up and down at a position above the downstream end portion in the transport direction of the carry-in conveyor 2. Yes.
In the feed roller device 3, the feed roller 7 is moved to the symbol R in FIG. 1 (a) by the operation of a feed motor (not shown) while applying a pressing force by its own weight to the wood W via the feed roller 7 riding on the wood W. By rotating in the direction of arrow _A , the wood W can be forcibly sent out to the cutting rotor 4.

<Description of cutting rotor>
The cutting rotor 4 is configured by mounting required (six in this example) chipper knives 12 on the rotor 11.
The rotor 11 has a horizontal axis perpendicular to the conveying direction of the wood W and is rotatably supported on both side walls of the casing 5. The rotor shaft 13 is concentric with the rotor shaft 13. and a mounted Chippadoramu 14, the rotational power from not shown rotor drive motor is transmitted to the rotor shaft 13, Chippadoramu 14 counterclockwise direction in FIGS. 1 (a) middle symbols R _B arrow direction (Fig. 1 ).
The chipper drum 14 has a plurality of (six in this example) cutout portions in which portions near the outer periphery are cut out at a predetermined angle (for example, 60 °), and the rotation direction of the chipper drum 14 is provided in each cutout portion. The tipper knife 12 is disposed with the cutting edge facing the tip, and the tipper knife 12 is fixed to the tipper drum 14 by a fixing means for fixing the tipper knife 12 by applying a clamping force.

<Description of sliding plate and fixed blade>
A sliding plate 20 is disposed between the carry-in conveyor 2 and the cutting rotor 4 so as to follow the carry-in path of the wood W by the carry-in conveyor 2. The sliding plate 20 is large enough to be able to ride on wood (wood end portion and end roller: wood W ′ described later) that can move freely between the feed roller 7 and the cutting rotor 4 apart from the feed roller 7. The front end edge portion is formed with a notch portion that is notched in an L shape over the entire region in the lateral direction, and the notch portion includes a cutting rotor. A fixed blade 21 is attached to support the wood W from below with an appropriate positional relationship with respect to the trajectory of the chipper knife 12 formed during the rotational movement 4. Accordingly, when the wood W is cut downward with the chipper knife 12, the wood W is stably supported from the lower side by the fixed blade 21 attached to the sliding plate 20, so that the posture of the wood W is stabilized and the shape Can be produced.

  As shown in FIGS. 2A and 2B, the upper surface of the sliding plate 20 has arc-shaped grooves 22 extending in the front-rear direction and capable of being fitted with the bottom of the wood W at a predetermined pitch in the lateral direction. A plurality of rows are formed, and on both sides of each groove 22 are formed ridges 23 that extend linearly in the front-rear direction and can contact the outer peripheral surface of the wood W. When the wood W fed out by the feed roller 7 rides on the sliding plate 20 having such a configuration, the boarded wood W fits into one of the grooves 22 provided in a plurality of rows, and the fitted wood W is It is guided so as to proceed straight to the cutting rotor 4 by the crests 23 on both sides of the groove 22. The sliding plate 20 corresponds to a “guide member” in the present invention.

<Explanation of regulation bar>
As shown in FIG. 1A, a regulating bar 25 is disposed between the cutting rotor 4 and the feed roller 7 at a position slightly higher than the wood W fed onto the sliding plate 20. The restriction bar 25 is made of, for example, a square bar having a quadrangular cross section, and both ends thereof are fixed to both side walls of the casing 5 so as to be horizontally mounted parallel to the axis of the cutting rotor 4. The regulation bar 25 corresponds to a “regulation member” in the present invention.

In the chip manufacturing apparatus 1 configured as described above, when the wood W is put into a hopper (not shown), the thrown-in wood W is transferred to the carry-in conveyor 2 as shown in FIG. Are continuously conveyed toward the cutting rotor 4 while being supported from below by an iron crawler belt plate attached to the conveyor chain 6. When the wood W is conveyed to the position of the feed roller 7 by the carry-in conveyor 2, the feed roller 7 rotated in the direction of the symbol _RA in FIG. 1A swings upward while riding on the wood W. The feed roller device 3 forcibly feeds the wood W to the cutting rotor 4 while applying a pressing force due to its own weight (a force generated by a gravitational action according to the mass of the feed roller 3 and the swing arm 9). Thus, the wood W pressed against the cutting rotor 4 in a state of being held between the carry-in conveyor 2 and the feed roller unit 3 is fed to the cutting rotor 4, FIGS. 1 (a) middle symbols R _B arrow direction of the rotor 11 Is rotated downward from the upper side to the lower side by the chipper knife 12 to be fragmented.

  As shown in FIG. 1 (a), when the wood W carried into the machine by the carry-in conveyor 2 is relatively long, the wood W is pressed against the carry-in conveyor 2 by the feed roller 7 and cut with the carry-in conveyor 2. The wood W is cut by a chipper knife 12 mounted on the cutting rotor 4 by being forcibly fed out on a sliding plate 20 disposed between the rotor 4 and the rotor 4. In the cutting operation in this case, the axis of the wood W is perpendicular to the blade of the chipper knife 12, and the wood W is cut in a direction intersecting the wood fiber direction to form a cutting tip. Note that the cutting chips are carried out through a screen (not shown) to a manufacturing chip place via a discharge conveyor (not shown).

  As shown in FIG. 1B, the wood W ′ (wood end portion) whose length has been shortened by cutting with the chipper knife 12 or the wood W ′ (end roller) having a short length from the beginning is fed. When separated from the roller 7 and sent to the sliding plate 20 between the feed roller 7 and the cutting rotor 4 and climbs onto the sliding plate 20, the wood W ′ is divided into a plurality of pieces as shown in FIG. It fits in one of the grooves 22 provided in a row, and is guided to proceed straight to the cutting rotor 4 by the crests 23 on both sides of the fitted groove 22.

  As shown in FIG. 2B, even when the wood W ′ is fed straight into the cutting rotor 4 without being rotated 90 ° laterally by the guide of the groove 22 (mountain portion 23), the feed roller is still used. Therefore, when the cutting force from the chipper knife 12 is applied to the wood W ′, the rear end side of the wood W ′ is flipped upward as shown in FIG. It is restricted that the wood W ′ collides with the restriction bar 25 and jumps further when it is raised. Further, as shown in FIG. 3B, the front end side of the wood W ′ is sprung upward by the reaction force at the time of cutting, and also at this time, the wood W ′ collides with the regulation bar 25 when it is lifted to some extent It is then restricted from jumping further. In this way, the vertical movement of the wood W ′ is restricted, so that the posture of the wood W ′ is prevented from becoming unstable, and the wood W ′ is rotated by 90 ° in the lateral direction due to the posture instability. Can be prevented.

  According to the wood chip manufacturing apparatus 1 of the present embodiment, even a wood W ′ that can move freely between the feed roller 7 and the cutting rotor 4 away from the feed roller 7 is parallel to the chipper knife 12. The sliding plate 20 is guided so as to move straight without rotating sideways so that the wood W ′ guided by the sliding plate 20 moves in the vertical direction as it is cut by the chipper knife 12. Since it is regulated by the regulation bar 25, the axis of the wood W ′ is perpendicular to the edge of the chipper knife 12, and the wood W ′ is cut in a direction crossing the wood fiber direction, so that a cutting tip is reliably manufactured. can do.

  The wood chip manufacturing apparatus of the present invention has been described based on one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the configuration is appropriately set within the scope not departing from the gist thereof. It can be changed.

  For example, in the above-described embodiment, the example in which the sliding plate 20 having a plurality of rows of arc-shaped grooves 22 (mountain portions 23) is employed as the guide member of the wood W ′ has been described. However, the present invention is not limited thereto. is not. For example, a sliding plate is used that has a flat upper surface that is fixed and placed in the horizontal direction at a predetermined interval with a plurality of elongated square bars (flat bars) that extend linearly in the front-rear direction and can contact the outer peripheral surface of the wood. May be. When the wood W ′ sent out by the feed roller 7 rides on the sliding plate having such a configuration in which a plurality of flat bars are arranged, the boarded wood W ′ forms a set of two flat bars adjacent to each other. It fits between two flat bars of any set of a plurality of sets of flat bars, and the fitted wood W ′ is guided to advance straight to the cutting rotor 4 by the two flat bars. become.

  The wood chip manufacturing apparatus of the present invention has a characteristic that a cutting chip can be reliably manufactured without becoming a pin chip even when cutting progresses and the wood becomes short or even when the wood is short from the beginning. Therefore, for example, it can be suitably used for the production of a cutting tip suitable for use in biomass power generation or pulp production, and industrial applicability is great.

DESCRIPTION OF SYMBOLS 1 Wood chip manufacturing apparatus 4 Cutting rotor 7 Feed roller 12 Chipper knife 20 Sliding board (guide member)
22 Groove 23 Mountain 25 Restriction bar (regulation member)
W, W 'wood

Claims (2)

A cutting rotor with a chipper knife mounted thereon is rotated, and the wood is cut with the chipper knife by feeding the wood straight with a feed roller so as to be perpendicular to the chipper knife toward the cutting rotor to produce a wood chip. In the wood chip manufacturing apparatus as described above,
Freely move between the feed roller and the cutting rotor away from the feed roller because cutting with the chipper knife has advanced and the length of the wood has become shorter or because the length of the wood is shorter from the beginning And a guide member for guiding the timber to move straight so as to prevent the timber from rotating sideways so as to be parallel to the chipper knife, and the wood guided by the guide member is cut by the chipper knife. A wood chip manufacturing apparatus, characterized in that a restricting member is provided for restricting movement in the vertical direction. The guide member has an upper surface large enough to be able to ride on wood that can move freely between the feed roller and the cutting rotor away from the feed roller, and the guide member has a top surface in the wood feed direction. Grooves that can be fitted into the bottom of the timber are formed in a plurality of rows at a predetermined pitch in the lateral direction. A plate-shaped sliding plate formed with a portion, wherein the regulating member is horizontally mounted in parallel with the axis of the cutting rotor at a position slightly higher than the wood fed onto the sliding plate. The wood chip manufacturing apparatus according to claim 1, wherein the wood chip manufacturing apparatus is a bar-shaped regulating bar disposed between a rotor and the feed roller.

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