JP6095166B2 - Bamboo fiber manufacturing apparatus and bamboo fiber manufacturing method - Google Patents

Description

  The present invention relates to a bamboo fiber manufacturing apparatus and a bamboo fiber manufacturing method for manufacturing bamboo fiber by cutting bamboo.

  Bamboo fiber has excellent antibacterial and deodorant properties and is a natural material with excellent fiber strength. As a conventional method for producing bamboo fiber, methods disclosed in the following Patent Documents 1 to 11 are known.

  The method disclosed in Patent Documents 1 to 3 is a method called a steaming explosion treatment method. The bamboo is divided in parallel with the axis and divided into a certain length and placed in a sealed container, This is a method of obtaining bamboo fibers by repeatedly raising and lowering the temperature under high pressure and then instantaneously returning to atmospheric pressure and decomposing bamboo fibers with the impact.

  The method disclosed in Patent Document 4 is a method referred to as a chemical treatment method, in which bamboo is boiled in a chemical solution such as sodium hydroxide for a certain period of time and decomposed into fibers. The method disclosed in Patent Documents 5 to 7 is a method called a rolling defibrating method. After bamboo is compressed and crushed through a stamping rolling mill, it is defibrated with a lapping machine, and further with a turbo mill or the like. It is a method to make bamboo fiber by making fine.

  The method disclosed in Patent Document 8 is a method called an impeller defibrating method. An impeller having a plurality of rotating blades after a piece of bamboo is cut into a certain length, pressed with a compression roll and flattened. Is a method of making bamboo fiber by defibrating along the fiber between the rotation of and a number of grooves provided inside the drum.

  The method disclosed in Patent Document 9 is a method called a screw extrusion defibrating method. A bamboo piece is cut into a fixed length, and heated in high temperature steam into a screw. In this method, fibers are obtained by extruding from many small holes provided at the tip.

  The method disclosed in Patent Documents 10 and 11 is a method called a drum-rotating type with a special unlocking blade, dividing bamboo into four vertically, flattening it once with a pressure roller, and sending it to the defibrating process, After that, the bamboo fiber is taken out by scratching the bamboo in the vertical direction with a blade rotating body in which a number of special blades are installed on the outer peripheral surface of the drum.

JP 2006-116917 A JP 2004-167730 A JP 2003-155679 A JP 2008-1064 A JP-A-6-15616 Japanese Patent Laid-Open No. 9-25145 JP-A-5-138617 JP 2000-71209 A JP 2008-229933 A JP 2008-114484 A JP 2008-307832 A

  However, among the conventional bamboo fiber manufacturing methods described above, the method of defibration under high temperature and high pressure causes a large damage to the bamboo material, and the bamboo fiber is damaged, and the use of the bamboo fiber is limited. End up.

  In addition, among the conventional bamboo fiber manufacturing methods, before the defibration process of breaking bamboo into fibers, the process of dividing the bamboo in parallel with its axis and making it into bamboo pieces is the whole process Becomes complicated and expensive to manufacture. Moreover, in patent documents 5-8,10,11, it is difficult to arrange | equalize the length of the bamboo fiber which is completed, and since a dispersion | variation arises, a use application will be limited.

  This invention is made | formed in view of such a subject, and it aims at providing the bamboo fiber manufacturing apparatus which can manufacture a good-quality bamboo fiber with a uniform size at low cost.

In order to solve the above-described problems, a bamboo fiber manufacturing apparatus according to the present invention is a bamboo fiber manufacturing apparatus that cuts bamboo and manufactures bamboo fiber. In order to adjust the distance between a cutting rotary body having a cutting blade whose blade edge extends in parallel to the bamboo axis, a rotating shaft parallel to the bamboo axis, and the bamboo to be cut and the cutting rotary body The bamboo rotation driving device includes a lower drive roller that is installed on the opposite side of the cutting rotating body with respect to the bamboo to be cut and rotates the bamboo. Both the rotating rotating bodies are brought into contact with each other while rotating, and the outer peripheral surface of the bamboo is cut by the cutting blade to produce bamboo fibers.

Further, the bamboo fiber manufacturing method according to the present invention is a bamboo fiber manufacturing method for manufacturing bamboo fiber by cutting bamboo, and a bamboo rotating step for rotating the bamboo around its axis, and a cutting edge parallel to the bamboo axis. A cutting blade rotating step of rotating a cutting rotary body including a cutting blade extending around a rotation axis parallel to the axis of the bamboo , the bamboo rotating step cutting the bamboo to be cut The bamboo is rotated by a lower drive roller installed on the opposite side of the blade, and the cutting blade is brought into contact with the bamboo by adjusting the distance between the bamboo to be cut and the cutting rotating body. Both are made to contact while rotating, and the bamboo outer peripheral surface is cut with the cutting blade to produce bamboo fiber.

  According to the bamboo fiber manufacturing apparatus according to the present invention, high-quality bamboo fibers having a uniform size can be manufactured at a low cost by a simple process.

It is a front view of the bamboo fiber manufacturing apparatus concerning the embodiment of the present invention. It is a top view of the bamboo fiber manufacturing apparatus concerning the embodiment of the present invention. It is sectional drawing by the III-III line of FIG. It is sectional drawing by the IV-IV line of FIG. It is sectional drawing by the VV line of FIG. It is a perspective view of the cutting rotary body concerning the embodiment of the present invention. It is a cross-sectional schematic diagram which shows the cutting state which concerns on embodiment of this invention. It is a front schematic diagram which shows the cutting state which concerns on embodiment of this invention. It is a cross-sectional schematic diagram which shows the cutting state which concerns on the modification 1 of embodiment of this invention. It is a longitudinal cross-sectional view of the cutting rotary body which concerns on the modification 2 of embodiment of this invention, Comprising: It is a figure corresponded in the XX cross section in FIG. It is the XI-XI sectional view taken on the line of the cutting rotary body shown in FIG. It is a cross-sectional schematic diagram which shows the cutting state by the cutting rotary body shown in FIG. It is a longitudinal cross-sectional view of the cutting rotary body which concerns on the modification 3 of embodiment of this invention. FIG. 14 is an exploded cross-sectional view of the cutting rotator shown in FIG. 13.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of the bamboo fiber manufacturing apparatus according to the present embodiment. FIG. 2 is a plan view of the bamboo fiber manufacturing apparatus according to this embodiment. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a perspective view of the cutting rotating body according to the present embodiment.

  The bamboo fiber manufacturing apparatus 1 according to the present embodiment includes a bamboo cutting device 20 that cuts the bamboo 5 and a bamboo supply device 10 that supplies the bamboo 5 to the bamboo cutting device 20.

  The bamboo supply device 10 stores the bamboo 5 as a material, supplies the bamboo 5 to the bamboo cutting device 20 one by one and supplies it, and discharges the remaining material of the bamboo 5 after cutting. Have. The bamboo supply device 10 includes a bamboo storage unit 11 that stores a plurality of bamboos 5 in a state where the bamboos 5 are arranged in parallel with the conveyance direction, a bamboo conveyance device 13 that conveys the bamboo 5 to the bamboo cutting device 20, And a discharge portion 18 for discharging the remaining material of the bamboo 5 after the cutting process.

  The bamboo storage unit 11 includes a bamboo receiver inclined bar 111 extending obliquely upward, and a bamboo lift member 113 that lifts the bamboo 5 positioned at the bottom of the bamboo receiver inclined bar 111 and supplies the bamboo 5 to the bamboo transport device 13 one by one. And. The bamboo receiving inclined bar 111 which is an inclined storage unit includes three inclined bars extending obliquely upward by about 10 to 15 ° from the side of the bamboo conveying device 13.

  In the bamboo storage unit 11, the bamboo 5 having a round shape just cut to a predetermined length is placed in parallel with the bamboo receiving inclined bar 111. When the lowermost bamboo 5 located on the side of the bamboo transfer device 13 is removed, the bamboo 5 placed on the bamboo receiving inclined bar 111 moves to the lowermost stage side by its own weight.

  The bamboo lift member 113 is provided below the lowermost stage of the bamboo receiving inclined bar 111 and includes two air cylinders that lift only the bamboo 5 located at the lowermost stage obliquely upward. One air cylinder is installed at each of the upstream side and the downstream side of the bamboo conveying device 13.

  The bamboo transport device 13 includes a belt conveyor 14 that transports the bamboo 5 toward the bamboo cutting device 20, and an upper pressing member 15 that presses the bamboo 5 placed on the belt conveyor 14 against the belt conveyor 14. I have.

  The belt conveyor 14 is installed on both ends of the endless belt 141 that transports the bamboo 5 placed on the upper surface in the direction of the bamboo axis, and the bamboo 5 placed on the endless belt 141 rolls left and right. And a conveyance guide 145 for guiding the belt so as not to fall off the belt. The overall length of the belt conveyor 14 is substantially the same as the length of the bamboo 5 stocked in the bamboo storage unit 11.

  The upper pressing member 15 has a pressing roller 151 installed to be rotatable around a horizontal rotation axis perpendicular to the conveying direction of the belt conveyor 14, and a lifting drive member 153 having an air cylinder mechanism for moving the pressing roller 151 up and down. And.

  The discharge unit 18 includes a discharge detection sensor 181, a discharge stopper 183, and a remaining material discharge shooter 185. The discharge detection sensor 181 is a sensor for detecting that the remaining length of the cut bamboo 5 has been shortened, and is installed on the lifting drive member 153 of the upper pressing member 15.

  The discharge detection sensor 181 detects the movement of the elevating drive member 153 so that the bamboo 5 on the belt conveyor 14 is detached from the pressing roller 151 and the remaining portion is shortened, that is, the remaining material of the bamboo 5 should be discharged. Detect state. The discharge stopper 183 normally restricts the stopper 5 so that the stopper protrudes on the conveyance path of the bamboo 5 and does not advance to the remaining material discharge shooter 185 on the downstream side, but the discharge detection sensor 181 discharges the remaining material of the bamboo 5. Is detected, the stopper is retracted, and the remaining material of the bamboo 5 can be conveyed to the remaining material discharge shooter 185.

  The bamboo cutting device 20 includes a casing 21, a cutting rotary body 30 in which a bamboo rotation driving device 22 for rotating the bamboo 5 around the axis during cutting and a cutting blade 33 for cutting the bamboo 5 are installed. And a rotary body raising / lowering drive member 37 that raises and lowers the cutting rotary body 30. The bamboo cutting device 20 rotates the bamboo 5 by the bamboo rotation driving device 22 and abuts the cutting blade 33 of the cutting rotating body 30 that rotates at high speed in the opposite direction in parallel to the bamboo 5, so that a predetermined length is obtained. Bamboo fiber 7 is manufactured.

  The casing 21 is a substantially quadrangular prism-shaped frame. The bamboo rotation driving device 22 is a driving device for rotating the bamboo 5 around the bamboo 5 from above and below, with the axis serving as a rotation axis. An upper driving roller 24 installed on the upper side of the bamboo 5, And a lower drive roller 26 installed on the lower side. Further, the bamboo rotation drive device 22 includes an elevating drive member 28 for moving the upper drive roller 24 up and down between a position in contact with the bamboo 5 and a retracted position.

  The upper drive roller 24 includes a pair of upper rotation rollers 241 installed above the bamboo 5 to be cut, and a drive motor 243 for rotating the upper rotation rollers 241. The pair of upper rotating rollers 241 are respectively installed at positions rotated about 15 ° to the left and right around the axis of the bamboo 5 from directly above the bamboo 5 (see FIG. 4).

  Similar to the upper drive roller 24, the lower drive roller 26 is a pair of lower rotation rollers 261 installed below the bamboo 5 to be cut, and a drive motor 263 for rotating these lower rotation rollers 261. And. The pair of lower rotation rollers 261 are respectively installed at positions rotated about 15 degrees to the left and right around the axis of the bamboo 5 from directly below the bamboo 5 (see FIG. 4).

  The drive motors 243 and 263 are driven so that the rotating rollers 241 and 261 rotate at a rotational speed of 60 rpm, for example. The rotating rollers 241 and 261 are provided with a large number of minute protrusions on the roller surface. When the bamboo 5 is driven to rotate, these protrusions bite into the outer peripheral surface of the bamboo 5 to prevent slippage between the rotating rollers 241 and 261 and the bamboo 5, and to rotate reliably from the rotating rollers 241 and 261 to the bamboo 5. The driving force is transmitted. In this embodiment, in order to rotate the bamboo 5 stably, all the four rotating rollers 241 and 261 are rotationally driven. However, at least one rotating roller may be rotationally driven.

  The raising / lowering drive member 28 moves the upper drive roller 24 up and down by an air cylinder mechanism and lowers the upper rotation roller 241 so as to press the bamboo 5 at the time of cutting, whereby the bamboo 5 is moved to the upper rotation roller 241 and the lower rotation roller 261. The rotation drive force is transmitted reliably.

  The cutting rotating body 30 includes a rotating shaft 31, a substantially cylindrical rotating body 32 that rotates integrally with the rotating shaft 31, a cutting blade 33 that is installed so that a blade edge 331 protrudes from the outer peripheral surface of the rotating body 32, And a drive motor 36 that rotationally drives the rotary shaft 31, and has a substantially cylindrical shape as a whole (see FIG. 6).

  The rotation shaft 31 is an axis installed in parallel with the rotation axes of the rotation rollers 241 and 261 of the bamboo rotation driving device 22 and is an axis parallel to the axis of the bamboo 5 to be cut. At both end portions of the rotary body 32, guide disks 321 having a predetermined diameter centering on the rotary shaft 31 are installed. The guide disk 321 is concentric with the cutting rotator 30. Further, the cutting blade 33 is a long (200 to 250 mm) blade that is installed extending from one end to the other end of the rotary body 32 in a state in which the cutting edge 331 protrudes from the outer peripheral surface of the rotary body 32.

  In addition, four cutting blades 33 are provided around the axis of the rotary body 32 at regular intervals every 90 °. Further, the cutting blade 33 is installed such that the cutting edge 331 protrudes outward, for example, by about 1 mm from the outer peripheral surface of the guide disk 321. The cutting rotator 30 shown in the drawing is provided with cuts 32A extending in the radial direction at the outer peripheral edge portion of the guide disk 321. Both ends of the cutting blade 33 are guided and held in the cuts 32A. . Since the cutting rotator 30 shown in the figure includes four cutting blades 33, each guide disk 321 is provided with four cuts 32A at equal intervals every 90 °. The guide disk 321 is configured such that the cutting edge 331 protrudes outward from the outer peripheral surface of the guide disk 321 by a predetermined amount in a state in which both ends of the cutting blade 33 are guided to the respective cuts 32A. In this structure, both ends of the cutting blade 33 are guided to the notches 32A of the guide disk 321 so that the load applied to both ends of the cutting blade 33 can be reduced while the cutting blade 33 is fixed at a fixed position. Depth can also be regulated. Note that five or more cutting blades 33 may be installed or three or less according to the required processing capacity.

  The cutting edge 33 of the cutting blade 33 has a recess 333 having a predetermined interval (for example, about 40 mm) and a width of about 2 mm and a depth of about 2 mm. A cutting edge is also formed in the valley portion of the recess 333. The drive motor 36 rotates the rotation shaft 31 in the direction opposite to the rotation direction of the bamboo 5 rotated by the rotation rollers 241 and 261 of the bamboo rotation driving device 22. The rotational speed of the rotating shaft 31 is 1,800 rpm, for example. However, the drive motor can also rotate the rotating shaft in the direction opposite to the rotating direction of the rotating roller. That is, the drive motor can rotate the rotation shaft in the same direction as the rotation direction of the bamboo rotated by the rotation roller.

  In such a configuration, the rotating body 32 rotates in the opposite direction in a parallel state while being pressed against the bamboo 5, so that the cutting edge 331 of the cutting blade 33 protruding about 1 mm outward from the outer peripheral surface of the rotating body 32 becomes the bamboo. 5 is cut at a substantially constant depth (about 1 mm), and the bamboo fiber 7 having a thickness of about 1 mm is cut. Bamboo manufactured by appropriately changing the amount by which the cutting edge 331 of the cutting blade 33 protrudes from the outer peripheral surface of the rotating main body 32, strictly speaking, from the outer peripheral surface of the guide disc 321 attached to both end portions of the rotating main body 32. The thickness of the fiber 7 can be adjusted.

  As shown in FIG. 7, the manufacturing apparatus described above rotates the rotating body 32 and the bamboo 5 in opposite directions, so that the bamboo rotating at a low speed is brought into contact with the cutting edge 331 of the cutting blade 33 and the bamboo 5. 5 is cut in a state where the cutting edge 331 of the cutting blade 33 rotating at high speed passes in the same direction. For this reason, the surface of the bamboo 5 can be cut evenly and smoothly by making it contact smoothly while reducing the relative speed of the cutting edge 331 of the cutting blade 33 to the surface of the rotating bamboo 5. In particular, the bamboo fiber can be cut stably without causing the cutting edge 331 of the cutting blade 33 protruding from the outer peripheral surface of the rotary body 32 to be cut deeper than necessary into the surface of the bamboo 5.

  Moreover, since the recessed part 333 is formed in the blade edge | tip 331 of the cutting blade 33 by the predetermined space | interval, the bamboo fiber to be cut is divided by the part of this recessed part 333, and the length of the bamboo fiber 7 to be cut and processed Is the same as the installation interval (for example, about 40 mm) of the recesses 333. Therefore, the length of the bamboo fiber 7 to be manufactured can be adjusted by appropriately changing the installation interval of the recesses 333.

  The rotary body lifting / lowering drive member 37 includes an air cylinder mechanism and lowers the cutting rotary body 30 so as to press the outer peripheral surface of the guide disk 321 against the bamboo 5 at the time of cutting. Moreover, even if the outer peripheral surface of the bamboo 5 is cut and thinned by the cutting process, the outer peripheral surface of the guide disk 321 is always pressed against the outer peripheral surface of the bamboo 5 during the cutting process. The descent control is performed as described above.

  As mentioned above, although the structure of the bamboo fiber manufacturing apparatus 1 which concerns on this embodiment was demonstrated in detail, the operation | movement at the time of the cutting process by the bamboo fiber manufacturing apparatus 1 is demonstrated. FIG. 7 is a schematic cross-sectional view showing a cutting state according to this embodiment, and FIG. 8 is a schematic front view showing a cutting state according to this embodiment.

  First, the operation when the bamboo 5 for processing is supplied to the bamboo cutting device 20 by the bamboo supply device 10 will be described. Among the bamboos 5 stored in the bamboo receiving inclined bar 111, when the lowermost bamboo 5 is lifted obliquely upward by the bamboo lift member 113, the lifted bamboo 5 gets over the transport guide 145 and moves on the belt conveyor 14. It is placed on the endless belt 141.

  When the conveyance of the bamboo 5 is started by the bamboo conveying device 13, the pressing roller 151 of the upper pressing member 15 is lowered, the endless belt 141 circulates in a state where the bamboo 5 is pressed against the endless belt 141, and the bamboo 5 It is conveyed toward the bamboo cutting device 20.

  When the bamboo 5 is conveyed until the tip of the bamboo 5 reaches the discharge stopper 183, the belt conveyor 14 stops and the pressing roller 151 rises, and the pressing of the bamboo 5 by the upper pressing member 15 is released.

  Thus, the cutting of the bamboo 5 by the bamboo cutting device 20 is performed in a state where the conveyance of the bamboo 5 by the bamboo supply device 10 is stopped. First, the upper drive roller 24 is lowered by the elevating drive member 28 and the pair of upper rotation rollers 241 are pressed against the bamboo 5 from above. A pair of lower rotating rollers 261 are located below the bamboo 5, and the bamboo 5 is sandwiched from four sides by a total of four rotating rollers 241 and 246 (see FIG. 5).

  In this state, the bamboo rotation drive device 22 drives the drive motor 243 of the upper drive roller 24 and the drive motor 263 of the lower drive roller 26, and the bamboo 5 sandwiched between the rotation rollers 241 and 261 rotates (in FIG. 7). Counterclockwise).

  Subsequently, the drive motor 36 of the cutting rotator 30 is driven to rotate the rotary body 32 in the opposite direction to the bamboo 5 (clockwise in FIG. 7), and the rotating bamboo lifting and lowering drive member 37 rotates the bamboo 5. The rotating rotating body 30 is lowered until the outer peripheral surface of the guide disk 321 comes into contact with the outer peripheral surface.

  Then, as shown in FIGS. 7 and 8, the cutting edge 331 of the cutting blade 33 that moves in the same direction is cut into the outer peripheral surface of the rotating bamboo 5, and the outer peripheral surface of the bamboo 5 is cut. A bamboo fiber 7 having a predetermined thickness is manufactured. Here, if the cutting amount of the blade edge 331 into the bamboo 5 is about 1 mm and the recesses 333 of the blade edge 331 are installed at intervals of 40 mm, the bamboo fiber 7 having a length of about 40 mm and a thickness of about 1 mm is manufactured. The

  Further, the rotary member elevating drive member 37 is controlled so that the outer peripheral surface of the guide disk 321 always abuts against the bamboo 5 during cutting, and the cutting depth of the cutting edge 33 of the cutting blade 33 into the bamboo 5 is constant. (About 1 mm), and the bamboo fiber 7 having the same thickness can be stably produced.

  In this way, when the first cutting of the bamboo 5 is finished, the drive motor 36 is stopped to stop the rotation of the cutting rotary body 30 and the cutting rotary body 30 is raised by the rotary body elevating drive member 37. In addition, in order to raise production efficiency, it is also possible not to stop the rotation of the cutting rotary body 30. Thereafter, the belt conveyor 14 is driven again, and the bamboo 5 is conveyed until the tip of the remaining bamboo 5 reaches the discharge stopper 183. The distance conveyed at this time is a length corresponding to the cut portion of the bamboo 5, and corresponds to the length of the cutting edge 331 of the cutting blade 33.

  Thereafter, the second stage cutting is performed in the same manner as the first stage. When the discharge detection sensor 181 detects that the remaining length of the bamboo 5 has been shortened by repeating such a cutting process, the discharge stopper 183 is retracted and is positioned at the lowermost stage of the bamboo receiving inclined bar 111. The next bamboo 5 to be placed is placed on the belt conveyor 14 and the conveyance by the belt conveyor 14 is started.

  Then, the short remaining material of the previous bamboo 5 is pushed out to the downstream side of the discharge stopper 183 by the next bamboo 5 and discharged from the remaining material discharge shooter 185. When the remaining material is discharged, the discharge stopper 183 protrudes again, and the cutting process described above is performed on the next bamboo 5 conveyed until the tip comes into contact with the discharge stopper 183.

  As mentioned above, although this embodiment was described in detail, according to this embodiment, the bamboo fiber 7 of desired size can be manufactured stably and continuously. In addition, if a plurality of bamboos 5 are put into the bamboo storage unit 11, since the bamboos 5 are automatically conveyed and cut, the work load can be greatly reduced.

  Further, according to the present embodiment, it is not necessary to preliminarily break the material bamboo 5, and the cutting process can be performed in a round shape. Therefore, the process can be simplified and the bamboo fiber 7 can be manufactured at low cost. Can do.

  Further, according to the present embodiment, the length of the bamboo fiber 7 is determined by the installation interval of the recesses 333 of the cutting blade 33, the thickness of the bamboo fiber 7 is the cutting edge 33 of the cutting blade 33, the outer peripheral surface of the cutting rotator 30, Strictly speaking, it is determined by the amount protruding from the outer peripheral surface of the guide disk 321 attached to both end portions of the rotating body 32. Therefore, by appropriately replacing the cutting blade 33, the size of the manufactured bamboo fiber 7 can be simplified. It is possible to change to

Subsequently, Modification 1 of the present embodiment will be described. FIG. 9 is a schematic cross-sectional view illustrating a cutting state according to the first modification of the present embodiment. In the first modification, only the configuration of the cutting rotator 30 is different from that of the above-described embodiment, and the other configurations are the same. Therefore, only different configurations will be described.

The cutting rotator 30 according to the first modification includes a plurality of small-diameter rotating rollers 322 rotatably arranged around an axis parallel to the rotating shaft 31 of the cutting rotator 30 and arranged on the outer peripheral surface thereof. It is characterized by.

According to the first modification, the same effects as those of the above-described embodiment can be obtained, and the friction when the outer peripheral surface of the bamboo 5 and the outer peripheral surface of the cutting rotating body 30 come into contact with each other during cutting is greatly reduced. Cutting is possible.

  In the said embodiment, although the four cutting blades were installed every 90 degrees in the cutting rotary body, 1-3 cutting blades and five or more cutting blades may be installed. However, in order to produce bamboo fibers having a uniform size, when a plurality of cutting blades are installed, it is desirable to install them at equal intervals in the outer circumferential direction.

  Furthermore, the modification 2 of this embodiment is demonstrated. 10 is a longitudinal sectional view of a cutting rotator according to a second modification of the present embodiment, FIG. 11 is a sectional view taken along the line XI-XI of the cutting rotator shown in FIG. 10, and FIG. 12 is a cut by the cutting rotator shown in FIG. It is a cross-sectional schematic diagram which shows a processing state. Also in the second modification, only the configuration of the cutting rotator 30 is different from that of the above-described embodiment, and the other configurations are the same. Therefore, only different configurations will be described.

  In the cutting rotator 30 according to the second modification, guide discs 323 are arranged on both sides of a substantially cylindrical rotary body 32 that rotates integrally with the rotary shaft 31, and these guide discs 323 are arranged on the rotary shaft. 31 is installed so as to be rotatable. The rotary main body 32 shown in the drawing has a central hole 32B through which the rotary shaft 31 is inserted, and a key groove 32C extending in the axial direction is provided in the central hole 32B. The rotating body 32 is fixed to the rotating shaft 31 so that the key 313 fixed to the insertion portion 311 of the rotating shaft 31 inserted through the center hole 32B is guided to the key groove 32B and can be rotated integrally with the rotating shaft 31. Has been.

  The guide disk 323 is connected to the rotary shaft 31 via a bearing 34 so as to be rotatable with respect to the rotary shaft 31. The guide disk 323 of FIG. 10 includes a circular and bowl-shaped outer peripheral portion 323A and a ring-shaped connecting portion 323B to which the bearing 34 is fixed. In the illustrated guide disk 323, the connecting portion 323 </ b> B is formed thicker than the outer peripheral portion 323 </ b> A, and is disposed concentrically facing the end surface of the rotating body 32. The guide disk 323 in FIG. 10 is connected to the rotating shaft 31 via two bearings 34. The guide disk 323 has a center hole 323C opened at the center of the connecting portion 323B, and a bearing 34 is inserted and fixed from each opening end of the center hole 323C. The pair of bearings 34 are spaced apart from each other along the axis of the center hole 323C, and a protrusion 323D is provided between the pair of bearings 34 so as to protrude from the inner peripheral surface of the center hole 323C of the coupling part 323B. And a ring-shaped spacer 344, which are sandwiched between a pair of bearings 34. As described above, the structure in which each guide disk 323 is connected to the rotating shaft 31 via the two bearings 34 can be arranged while holding the guide disk 323 in a vertical posture with respect to the rotating shaft 31. In particular, as shown in FIG. 10, the structure in which the pair of bearings 34 are separated from each other can stably hold the guide disk 323 with respect to the rotating shaft 31. However, the pair of bearings do not necessarily have to be arranged apart from each other, and can be arranged in close contact with each other. Furthermore, the guide disk can be connected to the rotary shaft via a single bearing.

  As shown in FIG. 10, the bearing 34 is a ball bearing in which a plurality of balls 343 are arranged between an inner ring 341 and an outer ring 342 having different diameters. However, roller bearings can also be used as bearings. The pair of bearings 34 fixed to the connecting portion 323B of the guide disk 323 sandwich the projecting portion 323D provided in the center hole 323C between the opposed outer rings 342, and between the opposed inner rings 341, form a ring shape. A spacer 38 is sandwiched. The guide disc 323 is connected to the rotating shaft 31 by inserting the insertion portion 311 of the rotating shaft 31 through the inner ring 341 and the spacer 38 of the pair of bearings 34.

  The pair of guide disks 323 arranged on both sides of the rotary body 32 are arranged in such a posture that the connecting portion 323 </ b> B protrudes toward the rotary body 32. For this reason, the rotary main body 32 shown in the drawing is provided with a recess 32D that guides the connecting portion 323B of the guide disk 323 on both end faces facing the guide disk 323. The concave portion 32D of the rotary body 32 is formed in an inner shape that is arranged here but does not contact the connecting portion 323B of the guide disk 323. Further, in the cutting rotator 30 of FIG. 10, a ring-shaped spacer 39 is disposed between the rotating body 32 and the guide disk 323. The spacer 39 has an inner diameter equal to the outer diameter of the insertion portion 311 of the rotating shaft 31 and has a thickness that abuts only on the inner ring 341 of the bearing 34. The spacer 39 is sandwiched between the inner surface of the recess 32 </ b> D of the rotary body 32 and the inner ring 341 of the bearing 34. The cutting rotator 30 presses the bearing 34 via the spacer 39, thereby fixing the bearing 34 to the rotating shaft 31 in a pressed state. The spacer 39 allows the cutting rotator 30 to be interposed between the guide disk 323 and the rotating body 32. A gap is provided to prevent the guide disk 323 from coming into contact with the end face of the rotary body 32.

  Furthermore, the rotary main body 32 shown in the drawing is provided with a plurality of fixing bases 32F radially to fix the cutting blades 33 at regular intervals around the axis. The rotary main body 32 shown in the figure is provided with six fixing bases 32F around the axis every 60 ° so that the six cutting blades 33 can be fixed at equal intervals. The fixed base 32F includes a fixed surface 32G extending in the radial direction, and the cutting blade 33 is fixed to the fixed surface 32G via a set screw 35. The cutting rotary body 30 shown in the figure includes six cutting blades 33. However, the structure for increasing the number of cutting blades 33 provided on the cutting rotary body 30 is obtained by cutting the bamboo 5 as shown in FIG. In doing so, the surface of the bamboo 5 can be efficiently cut. Accordingly, the number of rotations of the rotary body 32 can be reduced, and the burden on the drive motor 36 and the blade edge 33 can be reduced. For example, in the apparatus of the above-described first embodiment, four cutting blades 33 are provided on the rotary body 32 and the drive motor 36 is rotated at 1800 rpm. In this example, six cutting blades 33 are provided. Thus, the cutting efficiency can be made substantially equal by setting the rotational speed of the drive motor 36 to 1200 rpm.

  The cutting blade 33 fixed to the rotary body 32 is configured such that the cutting edge 331 protrudes outside the outer peripheral surface of the guide disk 323 by a predetermined protrusion amount. The cutting blade 33 shown in the drawing is arranged such that the blade edge 331 protrudes outward, for example, by about 1.5 mm from the outer peripheral surface of the guide disk 323. Further, the cutting blade 33 shown in the drawing protrudes in the extending direction of the cutting edge 331 at both ends of the cutting blade 33 so that the cutting edge 331 protrudes on the outer peripheral surface of the guide disk 323 without contacting the guide disk 323. Protruding portion 334 is provided. In the cutting blade 33, the protruding portion 334 is disposed outside the outer peripheral surface of the guide disk 323. The projecting portion 334 is arranged in a non-contact state on the outer peripheral surface of the guide disk 323, and rotates along the outer peripheral surface of the guide disk 323 in a state where the cutting blade 33 is rotated. The bamboo 5 is also cut at a portion facing the outer peripheral surface of the H.323.

  The rotary shaft 31 has a key 313 disposed at a portion where the rotary main body 32 is inserted. The rotary shaft 31 is provided with a key insertion hole 314 into which the key 313 is fitted in an insertion portion 311 inserted into the rotary body 32 and the bearing 34 in the axial direction. The key 313 is detachably attached to the key insertion hole 314. It is arranged. The rotating shaft 31 shown in FIG. 10 is provided with a stepped portion 312 with the diameter of the insertion portion 311 being slightly reduced, and the outer surface of the inner ring 341 of the bearing 34 through which the insertion portion 311 is inserted by the stepped portion 312. Pressing. In this cutting rotator 30, the insertion portion 311 is inserted into the bearing 34 of the guide disk 323 on one side (left side in FIG. 10), the bearing 34 is brought into contact with the stepped portion 312, and then the key 313 is inserted into the key insertion hole 314. After that, the insertion portion 311 is inserted into the center hole 32B of the rotation main body 32 while guiding the key 313 of the insertion portion 311 into the key groove 32C of the rotation main body 32. Further, the insertion portion 311 is inserted into the bearing 34 of the guide disk 323 disposed on the opposite side (right side in FIG. 10) of the rotating body 32, and the fixing ring 38 is fixed to the distal end side of the insertion portion 311 that penetrates the bearing 34. To do. As described above, the rotary body 32 having the guide disks 323 arranged on both sides is set on the rotary shaft 31.

  As shown in FIG. 12, the cutting rotator 30 described above has a cutting edge 331 of a cutting blade 33 that is rotated by a drive motor 36 on the surface of the bamboo 5 that is rotated by rotating rollers 241 and 261 of the bamboo rotation driving device 22. To cut. The cutting rotary body 30 is lowered by the rotary body lifting / lowering drive member 37 until the outer peripheral surface of the guide disk 323 comes into contact with the outer peripheral surface of the rotating bamboo 5. The surface of the bamboo 5 is cut by the cutting edge 331 of the cutting blade 33 protruding from the outer peripheral surface in a state of being in contact with the surface of 5. The drive motor 36 shown in the drawing rotates the rotary shaft 31 in the same direction as the rotation direction of the bamboo 5 rotated by the rotary rollers 241 and 261. The manufacturing apparatus for rotating the rotating body 32 and the bamboo 5 in the same direction is such that the surface of the bamboo 5 rotating at a low speed and the cutting edge 331 of the cutting blade 33 rotating at a high speed at the contact portion between the cutting edge 331 and the bamboo 5 of the cutting blade 33. Contact each other in opposite directions. For this reason, the surface of the bamboo 5 can be reliably cut by making it contact strongly while increasing the relative speed of the cutting edge 33 of the cutting blade 33 to the surface of the rotating bamboo 5. In particular, this structure can cut reliably while reducing the number of rotations of the drive motor 36. Even in a state where the protruding amount of the cutting edge 331 of the cutting blade 33 protruding from the outer peripheral surface of the rotary body 32 is reduced, the cutting edge 331 of the cutting blade 33 can be reliably cut into the surface of the bamboo 5 for cutting. However, as described above, the drive motor can also rotate the rotation shaft in the direction opposite to the rotation direction of the bamboo rotated by the rotation roller.

  Further, in the cutting rotator 30 described above, the guide disks 323 arranged on both sides of the rotary body 32 are coupled to the rotary shaft 31 via the bearings 34, so the rotary shaft 31 is in the direction indicated by the arrow in FIG. Even when the cutting blade 33 rotates in the direction indicated by the arrow A in the figure, the guide disk 323 does not rotate in the direction indicated by the arrow B in the figure, and is free with respect to the rotary shaft 31. Contact the surface of the bamboo 5 in a state. Thus, the guide disk 323 that is free with respect to the rotating shaft 31 does not suppress the rotation of the cutting blade 33 even in a state where the outer peripheral surface is in contact with the surface of the bamboo 5. Further, in a state where the outer peripheral surface of the guide disk 323 is in contact with the surface of the rotating bamboo 5, the guide disk 323 rolls along the surface of the rotating bamboo 5, so that the guide disk 323 contacts the bamboo 5. It is possible to effectively prevent the rotation of the bamboo 5 from being suppressed by the contact with the guide disk 323 by reducing the resistance. For this reason, even if the outer peripheral surface of the guide disk 323 comes into contact with the outer peripheral surface of the rotating bamboo 5, the friction at the contact portion is extremely reduced and good cutting is possible.

  Furthermore, the modification 3 of this embodiment is demonstrated. FIG. 13 is a longitudinal sectional view of a cutting rotator according to Modification 3 of the present embodiment, and FIG. 14 is an exploded sectional view of the cutting rotator shown in FIG. This modification 3 is characterized in that the cutting rotator 30 is provided with a guide disk 324 in the central portion, not on both sides of the rotary body 32. For this reason, also in the modification 3, since only the structure of the cutting rotary body 30 differs from the said embodiment and the other structure is the same, only a different structure is demonstrated.

  The cutting rotator 30 according to the third modification divides a substantially cylindrical rotary body 32 that rotates integrally with the rotary shaft 31 into left and right in the drawing, and guides a disc between the two divided rotary bodies 32. Is arranged. The rotary main body 32 shown in the drawing is divided into a pair of divided units 32X, and a guide disk 324 is arranged between the opposed divided units 32X. Each divided unit 32X guides the key 313 fixed to the insertion portion 311 of the rotating shaft 31 to a key groove (not shown) provided in the center hole 32B, and rotates the rotating shaft 31 in the same manner as the rotating body described above. It is being fixed to the rotating shaft 31 so that it can rotate integrally.

  The guide disk 324 is connected to the rotary shaft 31 via a bearing 34 so as to be rotatable with respect to the rotary shaft 31. The guide disk 324 shown in the figure has a circular and bowl-shaped outer peripheral portion 324A located at the center in the thickness direction of a ring-shaped connecting portion 324B to which the bearing 34 is fixed. That is, the connecting portion 324B of the guide disk 324 in the figure has a shape protruding toward both sides of the outer peripheral portion. In the illustrated guide disk 324, a pair of bearings 34 are spaced apart along the axis of the central hole 324C of the connecting portion 324B. Between the pair of bearings 34, a projecting portion 324D and a ring-shaped spacer 344 provided on the inner peripheral surface of the center hole 324C of the connecting portion 324B are disposed, and these are sandwiched between the pair of bearings 34. ing.

  In the guide disk 324 disposed between the pair of divided units 32X, the connecting portion 324B protrudes toward both sides of the outer peripheral portion 324A, so that each divided unit 32X has an opposing surface that faces the guide disk 324. A recess 32D for guiding the connecting portion 324B is provided. The concave portion 32D of the rotating body 32 is formed in an inner shape that is arranged here but does not contact the connecting portion 324B of the guide disk 324. Further, in the illustrated cutting rotator 30, a ring-shaped spacer 39 is disposed between the division unit 32X and the guide disk 324. The spacer 39 is sandwiched between the inner surface of the recess 32 </ b> D of the rotary body 32 and the inner ring 341 of the bearing 34. The cutting rotator 30 presses the bearing 34 via the spacer 39 to fix the bearing 34 to the rotating shaft 31 in a pressed state. The spacer 39 allows the cutting rotator 30 to be interposed between the guide disk 324 and the divided unit 32X. A gap is provided to prevent the guide disk 324 from contacting the end face of the split unit 32X. Further, similarly to the rotary main body 32 shown in FIG. 11, the divided unit 32X also fixes six cutting blades 33 to the fixed base 32F at equal intervals around the axis.

  The cutting blade 33 fixed to the division unit 32X is configured such that the cutting edge 331 protrudes outside the outer peripheral surface of the guide disk 324 by a predetermined protrusion amount. The cutting blade 33 shown in the drawing is arranged such that the blade edge 331 protrudes outward, for example, by about 1.5 mm from the outer peripheral surface of the guide disk 324. Further, the cutting blade 33 shown in the drawing is an extension of the blade edge 331 at the end on the guide disk 324 side in order to project the blade edge 331 without contacting the guide disk 324 on the outer peripheral surface of the guide disk 324. A protruding portion 334 protruding in the direction is provided. In the cutting blade 33, the protruding portion 334 is disposed outside the outer peripheral surface of the guide disk 324. The projecting portion 334 is disposed in a non-contact state on the outer peripheral surface of the guide disk 324, and rotates along the outer peripheral surface of the guide disk 324 in a state where the cutting blade 33 is rotated. The bamboo 5 is also cut at a portion facing the outer peripheral surface of 324. Since the cutting rotator 30 shown in the drawing has the cutting blades 33 disposed on both sides of the guide disk 324, the protrusions 334 provided on the respective cutting blades 33 have a protrusion amount to the center of the outer peripheral surface of the guide disk 324. . With this structure, the outer peripheral surface of the guide disk 324 can be covered with the cutting edge 331 of the cutting blade 33 over the thickness direction while reducing the protruding amount of the protruding portion 334 in each cutting blade 33. For this reason, there exists the characteristic which can make the load concerning the protrusion part 334 small.

  As shown in FIG. 14, the cutting rotary body 30 is inserted into the insertion portion 311 of the rotary shaft 31 in order from the left in the drawing, the divided unit 32X, the spacer 39, the bearing 34 of the guide disk 324, the spacer 39, and the divided unit 32X. Then, it is inserted through the fixing ring 38 and fixed to the rotating shaft 31 in a predetermined arrangement. Each divided unit 32X is inserted after the key 313 is inserted into the key insertion portion 314 of the insertion portion 311 as described above. The rotary shaft 31 shown in the figure has a structure in which a key 313 set in the insertion portion 311 is divided into two in the axial direction, and the key 313 is not disposed in a portion where the bearing 34 is inserted.

  Also in the above cutting rotating body 30, the guide disk 324 arranged at the center of the rotating body 32 is connected to the rotating shaft 31 via the bearing 34, so that the rotating shaft 31 rotates and the cutting blade 33 is moved. Even in the rotating state, the guide disk 324 does not rotate and contacts the surface of the bamboo 5 in a free state with respect to the rotating shaft 31. For this reason, even if the outer peripheral surface of the guide disk 324 comes into contact with the outer peripheral surface of the rotating bamboo 5, good cutting is possible without any friction at the contact portion. In particular, the cutting rotator 30 efficiently cuts the cutting blade 33 while specifying the cutting amount of the cutting blade 33 by bringing the central portion of the cutting rotator 30 into contact with the rotating bamboo while using one guide disk 324. it can.

  The embodiments of the present invention have been described above. However, the embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, the size and shape of each member constituting the bamboo fiber manufacturing apparatus can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 ... Bamboo fiber manufacturing apparatus 10 ... Bamboo supply apparatus 11 ... Bamboo storage part 111 ... Bamboo receiving inclination bar 113 ... Bamboo lift member 13 ... Bamboo conveyance apparatus 14 ... Belt conveyor 141 ... Endless belt 145 ... Conveyance guide 15 ... Upper pressing member 151 ... Pressing roller 153 ... Elevating drive member 18 ... Discharge part 181 ... Discharge detection sensor 183 ... Discharge stopper 185 ... Remaining material discharge shooter 20 ... Bamboo cutting device 21 ... Case 22 ... Bamboo rotation drive device 24 ... Upper drive roller 241 ... Upper side Rotating roller 243 ... Driving motor 26 ... Lower driving roller 261 ... Lower rotating roller 263 ... Driving motor 28 ... Elevating drive member 30 ... Cutting rotating body 31 ... Rotating shaft 311 ... Insertion part 312 ... Step part 313 ... Key 314 ... Key Insertion groove 32 ... Rotating body 32X ... Dividing unit 32A ... Notch 32B ... Center hole 32C ... Key groove 32D ... Recess 2F ... fixing base 32G ... fixing surface 321 ... guide disc 322 ... small diameter rollers 323 ... guide disc 323A ... outer peripheral portion 323B ... connecting portion 323C ... center hole 323D ... protrusion 324 ... guide disc 324A ... outer peripheral portion 324B ... Connecting portion 324C ... Center hole 324D ... Projection 33 ... Cutting blade 331 ... Cutting edge 333 ... Recess 334 ... Projection 34 ... Bearing 341 ... Inner ring 342 ... Outer ring 343 ... Spacer 344 ... Spacer 35 ... Set screw 36 ... Drive motor 37 ... Rotation Body lifting / lowering drive member 38 ... fixing ring 39 ... spacer 5 ... bamboo 7 ... bamboo fiber

Claims (12)

In a bamboo fiber manufacturing device that cuts bamboo to produce bamboo fiber,
A bamboo rotation drive device (22) that rotates the bamboo around its axis as a rotation axis;
A cutting rotator (30) having a cutting blade (33) with a cutting edge (331) extending parallel to the bamboo axis, and a rotation axis (31) parallel to the bamboo axis;
An elevating drive unit for adjusting the distance between the bamboo to be cut (5) and the cutting rotating body (30) ,
The bamboo rotation drive device (22) is installed on the opposite side of the cutting rotating body (30) with respect to the bamboo (5) to be cut, and the lower drive roller (26) for rotating the bamboo (5) With
A bamboo fiber manufacturing apparatus, wherein both bamboo and the cutting rotating body (30) are brought into contact with each other while rotating, and the outer peripheral surface of the bamboo is cut by the cutting blade (33) to manufacture bamboo fiber.   Recesses (333) are formed at predetermined intervals in the cutting edge (331) of the cutting blade (33) in order to form bamboo fiber to a predetermined length, and the recess also has a cutting blade. Item 1. The bamboo fiber manufacturing apparatus according to Item 1.   The cutting rotator (30) includes a single or a plurality of the cutting blades (33), and the cutting blades (33) are installed around the outer periphery of the cutting rotator (30) at equal intervals. The bamboo fiber manufacturing apparatus according to claim 1 or 2, characterized in that:   The cutting rotator (30) further includes a guide disk (321, 322, 323, 324) for limiting the cutting depth of the cutting blade (33) into the bamboo, concentrically with the cutting rotator (30), and the cutting blade The cutting edge (331) of (33) protrudes by a predetermined amount from the outer peripheral surface of the guide disk (321, 322, 323, 324) that contacts the bamboo during cutting. The bamboo fiber manufacturing apparatus as described.   The bamboo fiber manufacturing apparatus according to claim 4, wherein the guide disk (321) is fixed to the cutting rotating body (30). In a bamboo fiber manufacturing device that cuts bamboo to produce bamboo fiber,
A bamboo rotation drive device (22) that rotates the bamboo around its axis as a rotation axis;
A cutting rotator (30) having a cutting blade (33) with a cutting edge (331) extending parallel to the bamboo axis and a rotation axis (31) parallel to the bamboo axis;
Both bamboo and the rotating rotating body (30) are brought into contact while rotating, and the outer peripheral surface of the bamboo is cut by the cutting blade (33) to produce bamboo fibers.
The cutting rotator (30) further includes a guide disk (321, 322, 323, 324) for limiting the cutting depth of the cutting blade (33) into the bamboo concentric with the cutting rotator (30), and the cutting blade The cutting edge (331) of (33) protrudes by a predetermined amount from the outer peripheral surface of the guide disk (321, 322, 323, 324) that contacts the bamboo during cutting,
The bamboo fiber manufacturing apparatus, wherein the guide disks (323, 324) are rotatably installed with respect to the rotating shaft (31).   The guide disks (321, 323, 324) are arranged at both end portions of the cutting rotator (30), or are arranged at one place in the middle of the cutting rotator (30). The bamboo fiber manufacturing apparatus according to any one of 4 to 6.   The cutting rotator (30) includes a small-diameter rotating roller that is arranged along the outer peripheral surface of the cutting rotator (30) and is rotatably installed around an axis parallel to the rotation axis of the cutting rotator (30). The bamboo fiber manufacturing apparatus according to claim 1, wherein the apparatus is a bamboo fiber manufacturing apparatus. The lifting drive unit, any one of claims 1 to 8, characterized in that a rotary member lifting drive member for rotating pressed bamboo the outer peripheral surface of the cutting rotating body during cutting (30) (37) The bamboo fiber manufacturing apparatus described in 1. The lower drive roller (26) is a pair of lower rotation rollers (261) that contact the bamboo from below,
The bamboo rotation drive device (22) further comprises:
A pair of upper rotating rollers (241) in contact with the bamboo from above ;
A driving motor (243, 263) for rotating and driving at least one of the pair of upper rotating rollers (241) and the pair of lower rotating rollers (261);
The bamboo fiber manufacturing apparatus according to any one of claims 1 to 9, further comprising: It further comprises a bamboo feeder (10) for transporting the bamboo to the cutting position,
The bamboo feeder (10)
A conveyor guide (145) that guides the bamboo placed on the upper surface so that it does not roll down from side to side, and a belt conveyor (14) that transports the bamboo in the axial direction;
Bamboo is stored side by side in parallel, and an inclined storage unit is installed so that the lowermost stage is located beside the belt conveyor (14), and the upper surface of the belt conveyor (14) beyond the conveyance guide (145) In order to supply bamboo to the bamboo storage part (11) having a bamboo lift member (113) that lifts the bamboo at the bottom of the inclined storage part diagonally upward,
The bamboo fiber manufacturing apparatus according to any one of claims 1 to 10, further comprising: In the bamboo fiber manufacturing method of manufacturing bamboo fiber by cutting bamboo,
A bamboo rotation process that rotates the bamboo around its axis;
A cutting blade rotating step for rotating a cutting rotating body (30) provided with a cutting blade (33) having a cutting edge (331) extending parallel to the bamboo axis, around a rotation axis parallel to the bamboo axis,
With
The bamboo rotating step rotates the bamboo (5) with the lower drive roller (26) installed on the opposite side of the cutting rotating body (30) with respect to the bamboo (5) to be cut, and Adjusting the distance between the cutting bamboo (5) and the cutting rotating body (30) to bring the cutting blade (33) into contact with the bamboo (5);
A bamboo fiber manufacturing method, wherein both bamboo and the cutting blade (33) are brought into contact with each other while being rotated, and the outer peripheral surface of the bamboo is cut by the cutting blade (33) to manufacture bamboo fiber.

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