JPH07108505A - Method and device for cutting long bamboo - Google Patents

Abstract

PURPOSE:To automatically remove node dissepiments on an inner peripheral face of a long bamboo divided along the longitudinal direction by cutting a central cutting part and an inner peripheral face cutting part in a state that they are pressed to the inner peripheral face of the long bamboo. CONSTITUTION:A long bamboo 3 whose node dissepiments are removed is conveyed to a thickness determining body and an inner peripheral face sensor 32a at a side in contact with its inner peripheral face is pushed downward. The inner peripheral face sensor 32a which is pushed downward presses the inner peripheral face in the radial direction so as to detect the position of the inner peripheral face. At this time, the detected position is transferred as a position of an inner peripheral face sensor 32b which presses a thickness determining belt 31 in the radial direction. Accordingly, a position of a cutting face determinant 33a which corresponds to the position of the sensor 32b by interposing the thickness determining belt 31 indicates a position obtained by adding the thickness of the thickness determining belt 31 to a distance from a central axis O to the inner peripheral face of the long bamboo 3. It is transferred to a cutting face determinant 33b and an outer peripheral face cutting section 35a cuts the position transferred to the cutting face determinant 33b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a cutting device for cutting a long bamboo divided along a longitudinal direction while conveying the bamboo along the longitudinal direction.

[0002]

2. Description of the Related Art Regarding the removal of the nodal bulkheads on the inner peripheral surface of a half-divided long bamboo, since the degree of curvature of the half-divided long bamboo differs from one to another, a method of removing it manually has been conventionally used. .

The wall thickness of the half-divided long bamboo from which the knotted bulkheads are removed also varies among the individual half-divided long bamboos. For the method of removing this variation, a portable cutting tool or the like is used. By using it, it was processed by hand so that the wall thickness would be constant.

Also, regarding the length along the curve of the half-divided long bamboo in the cross section orthogonal to the longitudinal direction, since the length of each bamboo is different, the tree end is manually cut and bent. There was a process to make the length constant along.

[0005]

However, it is necessary to manually remove the partition wall, make the wall thickness constant, or make the length along the curve constant by hand, because the half-length bamboo is fibrous. Therefore, the processing is difficult, and the work is extremely troublesome.

The present invention was devised to solve the above problems, and an object of the inventions of claims 1 and 3 is to remove the nodal partitions on the inner peripheral surface of a long bamboo which is divided along the longitudinal direction. 5. A method for cutting a long bamboo and a cutting device capable of automatically performing the cutting are provided.
An object of the inventions described in (5) and (5) is to provide a cutting device and a cutting method for a long bamboo that can automatically keep the wall thickness of the long bamboo constant. An object of the present invention is to provide a long bamboo cutting device and a long bamboo cutting method capable of automatically making the width of the long bamboo divided along the longitudinal direction along the peripheral surface constant.

[0007]

[Means for Solving the Problems] In order to solve the above problems, a long bamboo cutting apparatus according to claim 1 conveys long bamboo divided along the longitudinal direction along the longitudinal direction. , Which is applied to a device for removing the nodal bulkheads on the inner peripheral surface of the long bamboo, and is a curved end of the long bamboo in a cross section orthogonal to the longitudinal direction, and the end along the longitudinal direction is a wood end. When it is referred to as a part, the direction perpendicular to the longitudinal direction and parallel to the straight line connecting the pair of tree ends is defined as the axial direction, and is provided on the tree end side of the long bamboo. A rotary shaft that is pressed in the direction of the roller to guide the outer peripheral surface and is driven to rotate, a central cutting part that is attached to this rotary shaft and removes the node partition wall of the central part of the inner peripheral surface of the long bamboo, and this rotary shaft. It is possible to rotate in accordance with the rotation of the A pair of cutting portions, one of which has a shape corresponding to one shape of the portion of the inner peripheral surface closer to the wooden end portion in the cross section and is pressed against the corresponding end portion side of the rotary shaft. , The other has an inner peripheral side surface cutting portion whose blade shape corresponds to the other shape of the inner end surface near the wood end portion and is pressed to the corresponding end side of the rotating shaft. It is configured.

A pair of rings movably in the axial direction are provided at positions on the rotary shaft that sandwich the inner peripheral side surface cutting portion, and a side surface facing the inner peripheral side surface cutting portion has an outer peripheral side. A guide ring that is formed in a taper that inclines toward the shaft end side of the rotary shaft toward the inner peripheral side surface cutting portion side, and the guide ring is provided on the inner peripheral side surface cutting portion side. The pressing force to be pressed is made larger than the pressing force to which the inner peripheral side surface cutting part is pressed toward the end part side, and in the cutting standby state, the mutual distance between the end parts on the outer peripheral side of the taper of the guide ring. Is made wider than the straight line distance between the outer peripheral surfaces of the tree end portions, and is made narrower than the straight line distance between the center side end portions of the taper.

Further, the method for cutting a long bamboo according to a third aspect of the invention is applied to a method of removing the node partition wall on the inner peripheral surface of the long bamboo while conveying the long bamboo along the longitudinal direction. The axial direction is the direction orthogonal to the longitudinal direction and parallel to the straight line connecting the pair of tree ends, and is provided on the tree end side of the long bamboo, and the outer circumference of the long bamboo A central cutting portion attached to a rotary shaft that is pressed and rotated in the direction of the roller that guides the surface removes the node partition wall at the central portion of the inner peripheral surface of the long bamboo, and rotates according to the rotation of the rotary shaft. And a pair of cutting parts that are movable in the axial direction of the rotary shaft, one of which is
The shape of the blade corresponds to one shape of the inner edge of the inner peripheral surface in the cross section and is pressed against the corresponding end side of the rotating shaft, and the other shape has the shape of the inner periphery. While corresponding to the other shape of the wood end portion of the surface, by the inner peripheral side surface cutting portion pressed to the corresponding end side of the rotating shaft, the partition wall of the inner peripheral surface of the wood end portion is formed. The removal method is used.

Further, in the long bamboo cutting device according to the present invention, the outer peripheral surface of the long bamboo divided along the longitudinal direction is cut while the long bamboo is conveyed along the longitudinal direction. Applied to the device, when the central axis is an axis that substantially coincides with the center along the longitudinal direction of the long bamboo, in the cross section orthogonal to the central axis, sandwiching the central axis, the long bamboo A thickness determining belt that forms a peripheral surface that is paired with the peripheral surface of bamboo, and has a constant thickness in the radial direction from the central axis,
Provided at positions facing each other with the central axis interposed therebetween,
When the ones press the inner peripheral surface of the long bamboo, the other presses the thickness determining belt in a radial direction from the central axis. Peripheral surface detector, for each of the pair of inner peripheral surface detectors, provided in an extension position in the radial direction from the central axis, interlocking so that the distance from the central axis is the same, According to the positional relationship with the thickness determining belt, one of which is provided corresponding to at least one of the pair of cutting surface determinants pressing the thickness determining belt in the central axis direction, and the pair of cutting surface determinants, A configuration including an outer peripheral surface cutting portion that cuts a position determined by the pair of cutting surface determinants, the pair of inner peripheral surface detectors, the pair of cutting surface determinants, and the outer peripheral surface cutting portion. , The central axis It is rotated together as a rotating shaft.

Further, in the method for cutting a long bamboo of the present invention according to claim 5, the outer peripheral surface of the long bamboo divided along the longitudinal direction is cut while the long bamboo is conveyed along the longitudinal direction. It is applied to the method, when the central axis is an axis that substantially coincides with the center along the longitudinal direction of the long bamboo, the central axis is opposed to each other, and the distance from the central axis is the same as each other. While pressing one of a pair of inner peripheral surface detectors interlocked to the inner peripheral surface of the long bamboo, with the other of the pair of inner peripheral surface detectors, in the cross section orthogonal to the central axis, the center While sandwiching the shaft, to form a peripheral surface to be paired with the peripheral surface of the long bamboo, while pressing a thickness determining belt having a constant thickness in the radial direction from the central axis in the radial direction from the central axis, For each of the pair of inner peripheral surface detectors, Of one of a pair of cutting surface determinants that are provided at extended positions in the radial direction and that interlock so that the distance from the central axis is the same as each other, while pressing the thickness determining belt in the central axis direction, The outer peripheral surface of the long bamboo is cut by an outer peripheral surface cutting section that is provided corresponding to at least one of the pair of cutting surface determinants and that cuts a position determined by the pair of cutting surface determinants, A method of integrally rotating the pair of inner peripheral surface detectors, the pair of cutting surface determiners, and the outer peripheral surface cutting portion with the central axis as a rotation axis is used.

Further, in the long bamboo cutting apparatus according to the invention of claim 6, the long bamboo tree ends divided along the longitudinal direction are conveyed while the long bamboo is conveyed along the longitudinal direction. It is applied to a device for cutting, and an arc having a constant length along the arc is positioned such that the tangent line at the bisected position of the arc is the same, and the diameter of the arc is the long length. When changing within the range of variation in the diameter of the bamboo, the shape approximate to the curve drawn by the end of the arc is set as the cutting cross-sectional shape of the blade for cutting the wood end.

Further, in the method for cutting a long bamboo according to the invention of claim 7, the long bamboo tree end portion divided along the longitudinal direction is conveyed while the long bamboo is conveyed along the longitudinal direction. It is applied to a cutting method, and the cutting cross-section shape is such that an arc having a constant length along the arc is positioned such that the tangent line at the bisected position of the arc is the same. When changing the diameter of the long bamboo within the range of variation in the diameter of the long bamboo, using a method of cutting the long bamboo tree end portion with a blade having a shape similar to the curve drawn by the end of the arc. ing.

[0014]

The operation of the invention according to claim 1 will be described below. A roller direction that is provided on the side of the long bamboo tree and that guides the outer peripheral surface, with the direction perpendicular to the longitudinal direction and parallel to the straight line connecting the pair of tree ends of the long bamboo as the axial direction. The central cutting part attached to the rotary shaft that is pressed and rotated by the method removes the partition wall in the central part of the inner peripheral surface of the long bamboo.

Further, there is a pair of cutting portions that rotate in accordance with the rotation of the rotating shaft and can move in the axial direction of the rotating shaft. One of them is the inner peripheral surface of the long bamboo in a cross section whose blade shape is orthogonal to the longitudinal direction. It corresponds to one of the shapes of the wood end part, and is pressed to the corresponding end side of the rotary shaft, while the other one corresponds to the shape of the blade of the other part of the wood end part and By the inner peripheral side surface cutting portion pressed to the corresponding end side, the knot partition wall of the inner peripheral surface of the long bamboo near the wooden end portion is removed.

That is, since the central cutting portion and the inner peripheral side surface cutting portion are cut while being pressed against the inner peripheral surface of the long bamboo,
Variations in the thickness of long bamboo are corrected by moving the rotation axis. Further, the variation in the curvature of the long bamboo is corrected by the position movement of the inner peripheral side surface cutting portion.

The operation of the invention according to claim 4 will be described below. One of a pair of inner peripheral surface detectors that face each other across the central axis and are interlocked so that the distance from the central axis is the same as each other is pressed against the inner peripheral surface of the long bamboo, and the pair of inner peripheral surface detectors On the other hand, in the cross section orthogonal to the central axis, sandwiching the central axis, a peripheral surface that forms a pair with the peripheral surface of the long bamboo is formed,
A thickness determining belt having a constant thickness in the radial direction from the central axis is pressed radially from the central axis.

Further, a pair of cutting surface determinators that are provided at positions extending in the radial direction from the central axis with respect to each of the pair of inner peripheral surface detectors and that interlock so that the distances from the central axis are the same. The thickness determining belt is pressed in the direction of the central axis by one side. Further, the outer peripheral surface of the long bamboo is cut by the outer peripheral surface cutting portion provided corresponding to at least one of the pair of cutting surface determiners. In addition, the pair of inner peripheral surface detectors, the pair of cutting surface determiners, and the outer peripheral surface cutting portion are integrally rotated with the central axis as the rotation axis.

That is, the position of the inner circumferential surface of the long bamboo is detected by one of the pair of inner circumferential surface detectors, and the detected position is indicated by the other inner circumferential surface detector. Therefore, the position displaced to the outer peripheral side by the thickness of the thickness determining belt is transmitted to one of the cutting surface determiners. Therefore, the position indicated by the other of the cutting surface determiners is a position where the thickness determined by the thickness determining belt is secured with respect to the inner peripheral surface. The outer peripheral surface cutting portion cuts this position.

The operation of the invention according to claim 6 will be described below. The shape of the cross section of the long bamboo perpendicular to the longitudinal direction is close to an arc. Therefore, the cutting cross-sectional shape of a cutting tool that cuts the wood edge is positioned so that the arc having a constant length along the arc is positioned so that the tangents at the bisector of this arc are the same, and the diameter of the arc When changing within the range of variation of the diameter of the long bamboo, if the shape is similar to the curve drawn by the end of the arc, the long bamboo whose wood edge is cut by this blade is Becomes almost constant.

[0021]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the outline of an embodiment of a cutting apparatus for removing the partition wall of long bamboo and determining the wall thickness of the long bamboo of the present invention.

In the figure, this embodiment is roughly classified as follows.
A long bamboo cutting device 1 that removes the node partition walls of the inner peripheral surface while conveying the long bamboo 3 divided into two along the longitudinal direction along the longitudinal direction A with the tree end as a reference. And long bamboo 3
While being conveyed along the longitudinal direction A, the outer peripheral surface is cut, and a long bamboo cutting device 2 for processing the long bamboo 3 to have a constant thickness.

Since the cutting device 1 guides the long bamboo 3 which is conveyed with the end of the tree as a reference, in contact with the outer peripheral surface of the long bamboo 3, the three bobbin-shaped rollers 211 to 213 pressed downward,
It is provided below the roller 211, is rotated by a motor (not shown), and is provided below the impeller 221 that conveys the long bamboo 3 in the longitudinal direction A and the roller 212, and is generated on the inner peripheral side of the long bamboo 3. Main body 222 for removing the knotted partition wall, and a roller 223 for supporting the wood end of the long bamboo 3 from below.
It is composed of and.

Further, the cutting device 2 guides the long bamboo 3 in contact with the outer peripheral surface of the long bamboo 3, so that the cutting bamboo 3 is pressed downward.
One roller 214 to 216, three rollers 224 to 226 for supporting the wood end of the long bamboo 3 from below, and a support 328 provided on the pedestal of the main body of the device are arranged vertically in correspondence with the rotation of the handle. It is movably provided and is configured by a wall thickness determining unit main body 229 that determines the wall thickness of the long bamboo 3.

FIG. 2 is an exploded perspective view of the removing portion main body 222, FIG. 3 is a cross-sectional view orthogonal to the longitudinal direction A of the block, and FIG. 6 is a view showing the thickness determining portion main body 229 along the longitudinal direction A. FIG. 7 is a sectional view taken along the central axis of the block.

2 and 3, the rotary shaft 11
Is the direction orthogonal to the longitudinal direction A and parallel to the straight line connecting the pair of wood ends of the long bamboo 3, and
It is a rotating shaft provided on the side of the wood end 304 of the long bamboo 3,
It is pressed toward the roller 212 by a spring (not shown) and is rotationally driven by a motor (not shown).

The central cutting part 12 is attached to the rotary shaft 11, and the shape of the outer peripheral side thereof corresponds to the central part 301 of the inner peripheral surface of the long bamboo 3 and has three blade-shaped blade parts 1.
21 is provided, which is a rotary blade for removing the node partition wall of the central portion 301 of the inner peripheral surface of the long bamboo 3.

In addition, the inner peripheral side surface cutting portion 13 has the rotating shaft 11
It is a pair of rotary blades that rotate in accordance with the rotation of 1 and are movable in the axial direction of the rotary shaft 11. Each of the inner peripheral side surface cutting parts 13 has six blade-shaped blade parts 1
31 is provided. Further, one of the blade shapes of the blade portion 131 (indicated by 131a) corresponds to the shape of one of portions (indicated by 302a) near the wood end of the inner peripheral surface of the long bamboo 3 in the cross section orthogonal to the longitudinal direction A. are doing. The spring 14a provided coaxially with the rotating shaft 11 causes
Is pressed in the right hand direction.

On the other hand, on the other side of the inner peripheral side surface cutting portion 13, the shape of the blade portion 131b is the portion 3 closer to the other wood end portion.
It corresponds to the shape of 02b, and by the spring 14b, as shown in FIG.
Is pressed to the left.

Further, the guide ring 15 is
A pair of rings is provided at each of the positions sandwiching the inner peripheral side surface cutting portion 13 so as to be movable in the axial direction. The side surface facing the inner peripheral side surface cutting portion 13 is formed in a taper that inclines toward the shaft end side of the rotating shaft 11 as it goes toward the outer peripheral side 151, and is pressed toward the inner peripheral side surface cutting portion 13 side by the spring 16. It has become so. The sleep 17 is a metal fitting that presses the spring 16 in the axial center direction.

The pressing force with which the guide ring 15 is pressed against the inner peripheral side surface cutting portion 13 is larger than the pressing force with which the inner peripheral side surface cutting portion 13 is pressed toward the end portion side of the rotating shaft 11. In the cutting standby state, the guide ring 15
The mutual distance between the ends of the outer peripheral side 151 of the taper is larger than the linear distance between the outer peripheral surfaces of the wood ends 304 of the long bamboo 3. Also, in the same state, the taper center side 15
The distance between the two is made smaller than the straight line distance.

In FIGS. 6 and 7, the thickness determining belt 31 includes a long bamboo 3 with a central axis O substantially coincident with the central axis of the long bamboo 3 in a cross section orthogonal to the longitudinal direction A.
Is a rubber-like belt formed to have a constant thickness in the radial direction from the central axis O by forming a peripheral surface that is paired with the peripheral surface of the belt. It is attached to the pedestal through.

The inner peripheral surface detector 32 is a detector in which a contactor 321 contacting the inner peripheral surface of the long bamboo 3 and a contactor 322 contacting the thickness determining belt 31 are coaxially provided. The contacts 321 and 322 have the same diameter (see FIG. 7).

The inner peripheral surface detector 32 is rotatably provided about the axis 311 at symmetrical positions with the central axis O interposed therebetween, and a pair of support plates 312 interlocking with each other via a link mechanism (not shown). Rotatably attached to each end of the. Therefore, the inner surface detector 32 is
They are linked so that the distances from the central axis O are the same.

The inner peripheral surface detector 32 is configured to press the inner peripheral surface of the long bamboo 3 in a radial direction from the central axis O by a spring (not shown). At other times, the other one presses the thickness determining belt 31 radially from the central axis O.

The cutting surface determiner 33 is a roller rotatably attached to an end portion of a support plate 342 that rotates around a shaft 341 provided on a flat plate donut-shaped ring 34, and has a pair of inner peripheral surfaces. Each of the detectors 32 is provided so as to be located at an extension position in the radial direction from the central axis O.

The connecting ring 331 and the rod 332, which are independently rotatable with respect to the ring 34, work together so that the distances from the central axis O are the same. Then, according to the positional relationship with the thickness determining belt 31, one of them presses the thickness determining belt 31 in the direction of the central axis O.

Further, the outer peripheral surface cutting portion 35 is a rotary blade provided coaxially with each of the cutting surface determinants 33, and its diameter is the same as the diameter of the cutting surface determinator 33, and via the shaft 341 and the belt 351. It rotates by the transmitted rotational driving force,
The cutting is performed at the position indicated by the cutting surface determiner 33.

The disc 314 provided with the inner peripheral surface detector 32 and the ring 34 are integrally rotated by a motor (not shown). The cutting surface determiner 33 and the pair of outer peripheral surface cutting portions 35 integrally rotate about the central axis O as a rotation axis.

FIG. 4 is a cross-sectional view of the cutting device 1 taken along the longitudinal direction A, and FIG. 5 is an explanatory view showing the long bamboo 3 and the node partition wall to be deleted. While referring to the figure as needed,
The operation of one embodiment of the present invention will be described below.

In the removal unit main body 222, the pressing force of the spring 16 causes the spring 14 to move in the standby state waiting for the conveyance of the long bamboo 3.
Since it is stronger than the pressing force of No. 3, the inner peripheral side surface cutting portion 13 is in a state of being pushed toward the center. Therefore, the inner peripheral side surface cutting part 13 is located at a standby position apart from the inner peripheral side surface of the long bamboo 3, and when the long bamboo 3 is conveyed in the longitudinal direction A, it contacts the inner peripheral surface of the long bamboo 3. do not do.

On the other hand, since the taper of the guide ring 15 is inclined toward the outer peripheral side 151 toward the shaft end side of the rotating shaft 11, the outer peripheral side 151 of the taper in the standby state.
The distance between the ends of the long bamboo 3 is wider than the linear distance between the outer peripheral surfaces of the wood ends 304 of the long bamboo 3. In the same state,
The mutual distances on the central side 152 of the taper are smaller than the above straight line distance.

Therefore, the long bamboo 3 conveyed in the longitudinal direction A by the rotation of the impeller 221 in the direction of arrow B in FIG. 15 is pushed to the shaft end side of the rotary shaft 11, and the inner peripheral side surface cutting portion 13 is no longer pressed. Therefore, the inner peripheral side surface cutting portion 13 is pressed against the end portion side of the rotating shaft 11 by the spring 14, and the node partition walls of the inner peripheral surface tree end portion portions 302 and 303 are removed.

Further, the central cutting portion 12 is so pressed by the roller 212 that the tip of the blade portion 121 is flush with the central portion 301 of the inner peripheral surface in accordance with the thickness of the long bamboo 3. Then, the nodal partition of the central portion 301 is removed. That is, the node partition wall on the inner peripheral side of the long bamboo 3 is removed by the central cutting portion 12 and the inner peripheral side surface cutting portion 13 (see FIG. 5). The arrow C in FIG. 4 indicates the rotation direction of the rotary shaft 11, and the cutting method is the upper cut method.

Next, the long bamboo 3 from which the knot partition walls have been removed is
The inner peripheral surface detector 32a on the side in contact with the inner peripheral surface of the main body 229 of the thickness determining portion is pushed downward. The inner peripheral surface detector 32a pushed downward detects the position of the inner peripheral surface by pressing the inner peripheral surface in the radial direction. The position detected at this time is transferred as the position of the inner peripheral surface detector 32b that presses the thickness determining belt 31 in the radial direction.

Therefore, the position of the corresponding cutting surface determiner 33a with the thickness determining belt 31 sandwiched therebetween is the position where the thickness of the thickness determining belt 31 is added to the distance from the central axis O to the inner peripheral surface of the long bamboo 3. Will be shown. And this position is
It is transferred to the cutting surface determiner 33b located on the outer peripheral surface side of the long bamboo 3. Therefore, the outer peripheral surface cutting portion 35a cuts the position transferred to the cutting surface determiner 33b (the position where the thickness of the thickness determining belt 31 is secured with respect to the inner peripheral surface).

The pair of inner peripheral surface detectors 32, the pair of cutting surface determiners 33, and the pair of outer peripheral surface cutting portions 35 rotate together with the disc 314 and the ring 34. Therefore, the outer peripheral surface of the long bamboo 3 is cut along the circumferential direction by the outer peripheral surface cutting portion 35a.

When the rotation continues from the rotation position shown in FIG. 6 in the arrow F direction, next, the inner peripheral surface detector 32
b detects the position of the inner peripheral surface of the long bamboo 3, and the outer peripheral cutting portion 35b located radially with respect to the inner peripheral surface detector 32b by the thickness of the thickness determining belt 31 is of the long bamboo 3. The outer peripheral surface will be cut.

That is, the long bamboo 3 is cut to a thickness equal to the thickness of the thickness determining belt 31 with the inner peripheral surface as a reference.

When the length of the long bamboo 3 is different, the positional relationship is as shown in FIG. 8 and the operation is the same as that already described. The long bamboo 3 has the inner peripheral surface as a reference.
The thickness determining belt 31 is cut to the thickness.

FIG. 9 is an external perspective view showing an embodiment of a long bamboo cutting device of the present invention.

In the present embodiment, the wood ends of the long bamboo 3 having a uniform thickness by the long bamboo cutting device whose configuration and operation have already been described are conveyed along the longitudinal direction, It is a device that cuts so that the length along the circumference of the long bamboo 3 in the cross section orthogonal to the longitudinal direction becomes constant.

Therefore, as shown in FIG. 10, an arc having a constant length along the arc is positioned such that the tangent line 42 at the bisected position 41 of the arc is the same, and the diameter of the arc is the same. When is changed within the range of variation in the diameter of the long bamboo 3, the curve drawn by the end of the arc is approximated by the straight line 43. Then, this straight line 43 is used as a cutting cross-sectional shape of a blade 45 for cutting a wood end.

The rotary shaft 4 to which the blade 45 is attached
Since 6 is substantially parallel to the straight line connecting both wood end portions 304 of the long bamboo 3, the blade 45 is the rotary shaft 4
6 is a conical rotary cutting tool in which the inclination of the inclined peripheral surface with respect to the rotation axis 46 in the section along 6 is about 37.6 degrees.

Further, the roller 47, which is provided on the rotary shaft 46 coaxially with the blade 45, is provided at the bisected position 4 shown in FIG.
1 is a roller for corresponding to the center position of the inner peripheral surface of the long bamboo 3, and the long bamboo 3 is conveyed by a roller (not shown).

The operation of the embodiment having the above configuration will be described. The long bamboo 3 before cutting the tree end has a length along its circumference longer than a desired length, and its length is not uniform. Therefore, the conveyed long bamboo 3 has the wood end cut by the blade 45, and the long bamboo 3 obtained as a result has a length along the circumference regardless of the degree of curvature. It is processed into a long bamboo 3 that is uniform.

The present invention is not limited to the above embodiment,
The long bamboo has been described as a half-divided bamboo, but other long bamboo can be used, for example, a long bamboo divided into three along the longitudinal direction.

Regarding the wall thickness determining unit body 229,
The case where the outer peripheral surface cutting portion 35 is provided corresponding to each of the cutting surface determinants 33 and continuously rotated around the central axis O has been described, but the inner peripheral surface detector 32a and the cutting surface determinator are described. 33b, the outer peripheral surface cutting portion 35a can be configured to rotate the outer peripheral surface side of the long bamboo 3 so as to reciprocate within a range of 180 degrees. At this time, the outer peripheral surface cutting portion 35b can be omitted. In addition, when the long bamboo is a bamboo divided into three pieces, the bamboo can be configured to rotate back and forth within a range of 120 degrees.

The shape of the blade 45 has been described as a conical shape so that the cutting cross-section has a desired shape. However, the rotating shaft for rotating the blade 45 is about 37. Rotation axis tilted at 6 degrees (straight line 4
In the case of a rotary shaft having 3 as the axis), the shape of the blade can be cylindrical.

[0060]

EFFECTS OF THE INVENTION The long bamboo cutting apparatus and cutting method according to the present invention convey the long bamboo along the longitudinal direction and remove the node partition wall of the inner peripheral surface at the center of the inner peripheral surface. The part is removed by the central cutting part attached to the rotary shaft which is pressed in the roller direction to guide the outer peripheral surface. Further, the node partition wall near the wood end is removed by the inner peripheral side surface cutting portion pressed in the axial end direction. Therefore, it is possible to automatically remove the nodal partitions on the inner surface of the long bamboo.

The long bamboo cutting apparatus and cutting method of the present invention detect the position of the inner circumferential surface of the long bamboo on one of the pair of inner circumferential surface detectors and transfer the detected position to the other. . Then, the position where the thickness of the thickness determining belt is added to this transfer position is detected by one of the pair of cutting surface determinators, and the detected position is transferred to the other. Then, the transferred position is cut by the outer peripheral surface cutting portion. That is, since the cutting that leaves the thickness of the thickness determining belt is performed on the basis of the inner peripheral surface of the long bamboo, the thickness of the long bamboo can be automatically made constant.

Further, in the apparatus and method for cutting a long bamboo of the present invention, an arc having a constant length along the arc is positioned so that the tangent line at the bisector of the arc is the same. On the other hand, when changing the diameter of the arc within the range of variation in the diameter of the long bamboo, the shape that approximates the curve drawn by the end of the arc is taken as the cutting cross-sectional shape of the knife that cuts the wood edge, and with this tool Since the end of a long bamboo tree is cut,
It is possible to automatically make the width of the long bamboo along the peripheral surface constant.

[Brief description of drawings]

FIG. 1 is a side view showing the outline of an embodiment of a cutting apparatus for removing the partition walls of a long bamboo and determining the wall thickness of the long bamboo of the present invention.

FIG. 2 is an exploded perspective view of a main body of a knot removing unit, which is a main part of a long bamboo cutting device.

FIG. 3 is a cross-sectional view orthogonal to the longitudinal direction of the knot removing unit main body.

FIG. 4 is an explanatory diagram showing an operation of removing the partition wall.

FIG. 5 is an external perspective view showing the long bamboo from which the node partition walls are removed.

FIG. 6 is a front view of the main body of the wall thickness determining portion of the long bamboo, as viewed along the longitudinal direction.

FIG. 7 is a cross-sectional view taken along the central axis of the body for determining the thickness.

FIG. 8 is a front view showing a state of the wall thickness determining unit main body when the length of the long bamboo is different.

FIG. 9 is an external perspective view showing an embodiment of the width determining portion of the long bamboo of the present invention.

FIG. 10 is an auxiliary diagram for explaining a cutting cross-sectional shape of a blade of a width determining portion of a long bamboo.

[Explanation of symbols]

 1 Cutting equipment for long rib bamboo section partition removal part 2 Cutting equipment for wall thickness determining part of long bamboo 3 Long bamboo 11 Rotation axis 12 Central cutting part 13 Inner circumference side cutting part 31 Thickness determination belt 32 Inner circumference Surface detector 33 Cutting surface determiner 35 Peripheral surface cutting part 45 Cutter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Morifune Uehara 1445-1 Oda, Hayato-cho, Aira-gun, Kagoshima Prefecture 1 Kagoshima Industrial Technology Center

Claims (7)

[Claims] 1. A long bamboo divided along the longitudinal direction,
In the device for removing the nodal partitions on the inner peripheral surface of the long bamboo while conveying along the longitudinal direction, a curved end of the long bamboo in a cross section orthogonal to the longitudinal direction, and an end along the longitudinal direction. When the part is a wood end, the direction that is orthogonal to the longitudinal direction and that is parallel to the straight line connecting the pair of wood ends is the axial direction, and is provided on the wood end of the long bamboo, A rotary shaft that is pressed in the direction of the roller that guides the outer peripheral surface of the long bamboo and is rotationally driven, and a central cutting portion that is attached to this rotary shaft and that removes the node partition wall at the central portion of the inner peripheral surface of the long bamboo. , A pair of cutting portions that rotate in accordance with the rotation of the rotating shaft and are movable in the axial direction of the rotating shaft, one of which is the blade shape of the portion of the inner peripheral surface near the wood end portion in the cross section. Corresponding to one shape, the rotary shaft Is pressed to the corresponding end side of the rotary shaft, and the other is pressed to the corresponding end side of the rotary shaft while the shape of the blade corresponds to the other shape of the inner end surface near the wood end. An apparatus for cutting a long bamboo, comprising an inner peripheral side surface cutting section. 2. A pair of rings movably in the axial direction at a position sandwiching the inner peripheral side surface cutting portion of the rotary shaft, wherein a side surface facing the inner peripheral side surface cutting portion has an outer periphery. A guide ring that is formed in a taper that inclines toward the shaft end side of the rotary shaft as it goes toward the side, and is pressed toward the inner peripheral side surface cutting part side, and the guide ring is pressed toward the inner peripheral side surface cutting part side. The pressing force is made larger than the pressing force by which the inner peripheral side surface cutting portion is pressed toward the end portion side, and in the cutting standby state, the mutual distance between the outer peripheral side end portions of the taper of the guide ring,
While making it wider than the straight line distance of the outer peripheral surface of the tree end,
The knot partition removing device for long bamboo according to claim 1, wherein the distance between the ends of the taper on the center side is smaller than the straight line distance. 3. A method for removing the nodal bulkheads on the inner peripheral surface of the long bamboo while conveying the long bamboo along the longitudinal direction, the method comprising: The direction parallel to the connecting straight line is set as the axial direction, and it is provided on the end of the long bamboo tree, and is attached to a rotary shaft that is pressed in the roller direction that guides the outer peripheral surface of the long bamboo and is rotationally driven. By the central cutting portion provided, while removing the node partition wall of the central portion of the inner peripheral surface of the long bamboo, a pair of cutting portions that are movable in the axial direction of the rotating shaft while rotating according to the rotation of the rotating shaft. , One of which corresponds to the shape of the blade in the cross section corresponding to one shape of the inner peripheral surface near the wood end portion, and is pressed against the corresponding end side of the rotating shaft, the other is the blade The shape is near the wood edge of the inner peripheral surface In addition to corresponding to the other shape, the inner peripheral side surface cutting portion pressed against the corresponding end portion side of the rotating shaft removes the node partition wall of the inner peripheral surface near the wood end portion. Long bamboo cutting method. 4. A device for cutting the outer peripheral surface of a long bamboo divided along the longitudinal direction while transporting the long bamboo along the longitudinal direction, wherein the center of the long bamboo along the longitudinal direction. When the axis substantially coincides with the central axis, in the cross section orthogonal to the central axis, sandwiching the central axis, to form a peripheral surface that forms a pair with the peripheral surface of the long bamboo, from the central axis A thickness determining belt having a constant thickness in the radial direction, provided at positions facing each other with the central axis interposed therebetween, and interlocked so that the distances from the central axis are the same,
When one of them presses the inner peripheral surface of the long bamboo, the other one of the pair of inner peripheral surface detectors pressing the thickness determining belt in the radial direction from the central axis, and the pair of inner peripheral surface detectors respectively. With respect to the thickness determining belt, which is provided at an extension position in the radial direction from the central axis and is interlocked so that the distances from the central axis are equal to each other, and one of the thickness determining belts determines the thickness. A pair of cutting surface determiners that press the belt in the central axis direction, and an outer circumference that is provided corresponding to at least one of the pair of cutting surface determiners and cuts a position determined by the pair of cutting surface determiners. A long cut, comprising: a surface cutting section, wherein the pair of inner peripheral surface detectors, the pair of cutting surface determiners, and the outer peripheral surface cutting section are integrally rotated with the central axis as a rotation axis. Bamboo cutting equipment . 5. A method for cutting an outer peripheral surface of a long bamboo divided along the longitudinal direction while transporting the long bamboo along the longitudinal direction, comprising a center along the longitudinal direction of the long bamboo. When the axis substantially coincides with the central axis, one of a pair of inner peripheral surface detectors facing each other with the central axis sandwiched therebetween and interlocking so that the distances from the central axis are the same are While pressing against the peripheral surface, with the other of the pair of inner peripheral surface detectors, in the cross section orthogonal to the central axis, sandwiching the central axis, the peripheral surface forming a pair with the peripheral surface of the long bamboo. Forming and pressing the thickness determining belt having a constant thickness in the radial direction from the central axis in the radial direction from the central axis, and radiating from the central axis to each of the pair of inner peripheral surface detectors. It is provided at an extension position of the direction and the distance from the central axis With one of a pair of cutting surface determiners that are interlocked to be the same as each other, while pressing the thickness determining belt in the central axis direction, provided corresponding to at least one of the pair of cutting surface determiners, While cutting the outer peripheral surface of the long bamboo by the outer peripheral surface cutting unit that cuts the position determined by the pair of cutting surface determinants, the pair of inner peripheral surface detectors and the pair of cutting surface determinants and the A method for cutting a long bamboo, characterized in that the outer peripheral surface cutting part is integrally rotated around the central axis as a rotation axis. 6. A device for cutting an end of a long bamboo tree divided along the longitudinal direction while conveying the long bamboo along the longitudinal direction, wherein the length along the arc is constant. A certain arc is 2 of this arc
While changing the diameter of the arc within the range of variation in the diameter of the long bamboo while locating so that the tangent lines at equal positions are the same, a shape approximate to the curve drawn by the end of the arc, A device for cutting a long bamboo, characterized in that it has a cutting cross-sectional shape of a cutting tool that cuts the wood end. 7. A method for cutting an end of a long bamboo tree divided along the longitudinal direction while transporting the long bamboo along the longitudinal direction, wherein the cutting cross-sectional shape is along the arc. When a circular arc having a constant length is positioned such that the tangents at the bisected position of the circular arc are the same, and the diameter of the circular arc is changed within the range of variation in the diameter of the long bamboo, A method of cutting a long bamboo, characterized in that the edge of the long bamboo tree is cut by a blade having a shape similar to a curve drawn by the end of the arc.