JP7449625B1 - Bamboo splitting machine - Google Patents

Abstract

[Problem] To provide a bamboo splitter that moves split bamboo without leaving it in the vicinity of a cutter and reliably splits the bamboo to the rear end. [Solution] The bamboo splitting machine is provided with a roller chain that spans multiple sprockets, and includes a chain hook that moves as the sprockets rotate, a sprocket drive unit that rotates the sprockets, and a pair of chain hooks that extend diagonally upward. A bamboo insertion part having an inclined wall, a cutter placed in front of the chain hook in the direction in which it moves, a guide part placed in front of the cutter, and a space provided between the bamboo inserting part having an inclined wall and the split bamboo that has passed through the guide part being inserted. The guide section includes two arranged retraction rollers and a retraction roller driving section that rotates the two retraction rollers, and the guide section has an entrance opening that serves as an entrance for the split bamboo, and a dimension in the height direction that is smaller than the entrance opening. The cutter has an exit opening that serves as an exit for the split bamboo, and a guide surface that guides the split bamboo from the entrance opening to the exit opening, and the cutter has a plurality of blades arranged radially. [Selection diagram] Figure 1

Description

The present invention relates to a bamboo splitting machine that splits bamboo.

One way to utilize felled bamboo is to turn it into fuel and use it for heat. One method of turning bamboo into fuel is to cut the bamboo lengthwise into multiple pieces, and then use a chipper or the like to cut the bamboo into smaller pieces into chips. Splitting bamboo to reduce its volume makes it easier to dry bamboo. Splitting bamboo can increase the efficiency of using bamboo as fuel, since drying bamboo increases the amount of heat it burns.

Bamboo splitters, which have multiple blades arranged in a radial pattern, are used as tools for manually splitting bamboo. However, in order to use bamboo as fuel, it is first necessary to split a large amount of bamboo. Therefore, bamboo splitters, bamboo splitting devices, and the like are used to split bamboo. For example, Patent Document 1 discloses a bamboo bisecting device that divides the bamboo into two by pushing the bamboo with a claw protruding from a chain and pressing the bamboo against a machete blade. Further, Patent Document 2 discloses a bamboo splitting machine that uses a hydraulic or pneumatic cylinder to push and move bamboo and splits the bamboo lengthwise with a blade. Further, Patent Document 3 discloses a bamboo splitting device in which bamboo is input vertically and the bamboo is pushed down from above by a splitting blade disposed below to split the bamboo. After splitting bamboo using such a bamboo splitting machine, the bamboo is cut into chips.

Japanese Unexamined Patent Publication No. 52-38699 Japanese Patent Application Publication No. 2000-198102 Japanese Patent Application Publication No. 2004-262098

In order to use bamboo as fuel, a device is needed to continuously and smoothly divide a large amount of bamboo before turning it into chips using a chipper or the like. Conventional bamboo splitting machines, such as those disclosed in Patent Documents 1 to 3, are all bamboo splitting machines that split bamboo by pressing it against a blade. With conventional bamboo splitting machines that only use a means of pressing bamboo against a blade, split bamboo may remain in the vicinity of the blade, or the bamboo may not be split to the rear end. When this happens, it becomes a hassle to remove the bamboo from the blade, making it impossible to continuously and smoothly divide a large amount of bamboo. In addition, in order to divide large-diameter bamboo into pieces that can be used as fuel, it is necessary to increase the number of bamboo divisions. For example, in order to divide bamboo with a large diameter into ten pieces, the bamboo cannot be divided smoothly unless it is moved and pressed against the blade with greater force.

An object of the present invention is to provide a bamboo splitting machine that can move the bamboo smoothly and reliably split the bamboo to the rear end without leaving the split bamboo in the vicinity of the blade.

A bamboo splitting machine according to a first aspect of the present invention includes: a chain hook that is provided on a roller chain that spans a plurality of sprockets and is moved by the rotation of the sprockets; a sprocket drive section that rotates the sprockets; A bamboo insertion part has a pair of inclined walls extending obliquely upward so as to expand from the vicinity of both sides of the tensioning part of the roller chain, and a part of the roller chain where the chain hook is provided connects the tensioning part. When forming, the chain hook is divided by a blade placed in front of the direction in which the chain hook travels (hereinafter referred to as the "travel direction"), a guide part placed in front of the blade in the travel direction, and the blade. two pull-in rollers arranged at intervals such that the split bamboo that has passed through the guide part is inserted between them; and the split bamboo that has been inserted between the two pull-in rollers is pulled out from the guide part. a retracting roller drive unit that rotates the retracting roller so that the retracting roller is rotated, and the guide unit has an inlet opening that serves as an entrance for the split bamboo divided by the cutter, and a guide unit that has an inlet opening that is larger in height than the inlet opening. The blade has an exit opening that serves as an exit for the small split bamboo, and a guide surface that guides the split bamboo that has entered from the entrance opening to the exit opening, and the cutter has a plurality of blades arranged radially. .

According to the bamboo splitting machine having such a configuration, the bamboo is not only pressed against the cutter using the chain hook, but also the split bamboo is pulled in and moved from the cutter using the pull-in roller, so that the bamboo can be split smoothly up to the rear end of the bamboo. Can be done.

In the bamboo splitting machine according to the second aspect of the present invention, the chain hook has a contact portion that contacts the rear end of the bamboo, and the contact portion has a curved shape with a concave center in the vertical direction. have

According to the bamboo splitting machine having such a configuration, the chain hook can smoothly push the bamboo all the way to the end.

In the bamboo splitting machine according to the third aspect of the present invention, before pressing the bamboo against the blade, two rollers are provided for positioning the bamboo in the left and right directions with respect to the traveling direction with respect to the blade. Further, the two rollers are disposed symmetrically with respect to the roller chain at the front end of the bamboo input section and diagonally such that central axes of the two rollers intersect below the bamboo. ing.

According to the bamboo splitting machine having such a configuration, the bamboo can be pressed against the blade at an appropriate position.

In the bamboo splitting machine according to the fourth aspect of the present invention, the sprocket drive unit and A setting means is provided for setting the retracting roller driving section, and when the front end of the split bamboo starts to be retracted by the retracting roller, the rear end of the bamboo is being pushed by the chain hook.

According to the bamboo splitting machine having such a configuration, the chain hook prevents the bamboo from being forcibly pushed, and the split bamboo can be smoothly drawn in by the drawing roller.

A bamboo splitting machine according to a fifth aspect of the present invention includes a sensor for detecting the diameter of the bamboo, a control device, the split bamboo is pulled in by the pulling roller, and the rear end of the bamboo is connected to the chain hook. further comprising determining means for determining whether the bamboo is being pushed by the chain hook, and when the sensor detects that the diameter of the bamboo is larger than a predetermined value, the control device is configured to control the control device to temporarily press the chain hook. Control to stop.

According to a bamboo splitting machine having such a configuration, even bamboo having a large diameter can be split smoothly.

According to the present invention, it is possible to provide a bamboo splitting machine that can move bamboo smoothly and reliably split bamboo up to its rear end without leaving the split bamboo in the vicinity of the blade.

It is a side view of the bamboo splitter of a 1st embodiment. It is a top view of the bamboo splitter of a 1st embodiment. (a) is a front view of the chain hook attached to the roller chain, (b) is a rear view of the chain hook attached to the roller chain, and (c) is a front view of the chain hook attached to the roller chain. It is a side view of a hook. (a) is a schematic diagram of the chain hook and the back end of the bamboo in a state where the back end of the bamboo has started to be pushed, and (b) is a schematic diagram of the chain hook in the state where the back end of the bamboo pushed by the chain hook has moved upward. and a schematic diagram of the rear end of bamboo. (a) is a schematic diagram showing a state in which a chain hook is used to push the back end of a warped bamboo, and (b) is a schematic diagram showing a state in which a chain hook is used to push the back end of a warped bamboo. FIG. 3 is a schematic diagram showing a state in which the button has moved upward. 2 is a sectional view taken along line AA in FIG. 1. FIG. 2 is a sectional view taken along line BB in FIG. 1. FIG. 2 is a sectional view taken along the line CC in FIG. 1. FIG. FIG. 6 is a schematic view of the front end of the split bamboo passing through the exit opening of the guide part. 2 is a sectional view taken along line DD in FIG. 1. FIG. FIG. 3 is a partial cross-sectional view of the retraction roller. FIG. 2 is a schematic diagram of a mechanism for rotating two retraction rollers with one motor and a mechanism for holding the retraction rollers. FIG. 2 is a sectional view taken along the line EE in FIG. 1; 2 is a sectional view taken along line FF in FIG. 1. FIG. It is a sectional view of a bamboo splitter showing a state in which bamboo is positioned in the left-right direction by rollers. It is a side view of the bamboo splitter in a state where bamboo is split. FIG. 3 is a plan view of the bamboo splitter in a state where bamboo is split. It is a side view of the bamboo splitter of 2nd embodiment. It is a top view of the bamboo splitter of 2nd Embodiment.

Hereinafter, a bamboo splitter 1 according to an embodiment of the present invention will be described with reference to the drawings. As shown in the side view of FIG. 1 and the plan view of FIG. It includes a feeding part 4, a cutter 5 that divides the bamboo 10 into a plurality of pieces, a guide part 6 that guides the divided bamboo 10b, two pulling rollers 7 that pull in the divided bamboo 10b, and a pulling roller drive part 30. In this embodiment, the bamboo splitter 1 splits bamboo 10 having a length of about 1.8 m and a diameter of 80 to 200 mm. The length, diameter, etc. of the target bamboo 10 can be changed.

The chain hook 2 is provided on a roller chain 20 that spans a plurality of sprockets 22, and is moved by the rotation of the sprockets 22. A plurality of (two in this embodiment) chain hooks 2 are attached to the roller chain 20 at equal intervals by attachments 23. As shown in FIG. 1, the roller chain 20 spans a plurality of (two in this embodiment) sprockets 22. In this embodiment, the direction in which the chain hook 2 travels when the portion of the roller chain 20 where the chain hook 2 is provided forms a tension section is referred to as the "traveling direction." Hereinafter, the above-mentioned "progressing direction" will be defined as forward, and the opposite direction to the above-mentioned "progressing direction" will be defined as backward. The tension portion refers to a portion of the roller chain 20 that is apart from the sprockets 22 and is stretched between the two sprockets 22. The traveling direction of the chain hook 2 is the traveling direction of the bamboo 10.

In this embodiment, sprockets 22 are arranged before and after the bamboo input section 4. The sprocket drive section 3 is provided to rotate a sprocket 22 arranged in front of the bamboo input section 4. When one sprocket 22 is rotated by the sprocket drive unit 3, the two chain hooks 2 are moved simultaneously by the roller chain 20. The roller chain 20 includes each pair of link plates 21 arranged in parallel to each other, rollers 28b arranged at the front and rear in the traveling direction between each pair of link plates 21, and rollers 28b arranged in the traveling direction between each pair of link plates 21. It includes pins 28a disposed at the front and rear to rotatably support the roller 28b and connect the link plate 21.

As shown in FIG. 3, the chain hook 2 has a contact part 24, a bottom part 25, and a main body part 27. Chain hook 2 is attached to roller chain 20 using a pair of attachments 23. As shown in FIG. 3(a), a pair of attachments 23 are attached to the bottom portion 25 with bolts. As shown in FIG. 3(b), the main body portion 27 has two walls 27a and a top portion 27b. The main body part 27, together with the bottom part 25 and the contact part 24, has a box shape, and is open at the rear in the traveling direction. The chain hook 2 is attached to the roller chain 20 by attaching a pair of attachments 23 attached to the bottom portion 25 instead of the pair of link plates 21 to the roller chain 20. At this time, the pair of attachments 23 and the pair of link plates 21 are connected by a pin 28a, and a roller 28b is attached to the pin 28a. As shown in FIG. 3(a), the attachment 23 has a substantially L-shaped portion extending upward from the upper end of a portion having the same shape as the link plate and a portion having the same shape as the link plate, and further bending in the horizontal direction. It has When the bottom part 25 is placed on the horizontally bent part of the attachment 23 and the bottom part 25 and the attachment 23 are fixed with bolts, the bottom part 25 is supported by the pair of attachments 23.

The contact portion 24 is used to contact the rear end of the bamboo 10 and push the rear end of the bamboo 10. Therefore, as shown in FIG. 3(a), the contact portion 24 has a substantially rectangular shape when viewed from the front, and when viewed from the side, the upper and lower ends protrude forward. , has a curved shape with a concave center in the vertical direction. The contact portion 24 has a curved shape that extends further downward than the bottom portion 25 . The lower end of the contact portion 24 extends to a height close to the roller 28b located between the pair of attachments 23 when the chain hook 2 is attached to the roller chain 20. In order to extend the lower end of the abutting part 24 downward until it approaches the roller 28b, the lower end of the abutting part 24 is provided with the link plate portions of the pair of attachments 23 and the link plate 21 to which the attachments 23 are connected. Two notches 29 are provided in the portion that comes into contact with. A portion of the link plates of the pair of attachments 23 and a portion of the pair of link plates 21 to which the pair of attachments 23 are connected are inserted into the two notches 29 provided at the lower end of the contact portion 24 . As a result, as shown in FIG. 3(a), the lower end of the contact portion 24 has a protrusion 26 in which the portion between the two notches 29 is inserted between the pair of attachments 23. Form. When the chain hook 2 is attached to the roller chain 20, there is a gap between the bottom part 25 and the roller 28b, but in order to prevent the bamboo 10 from entering this gap, the lower end of the contact part 24 is A protrusion 26 is provided extending downward from the bottom 25. By bringing the lower end of the protrusion 26 close to the roller 28b located between the pair of attachments 23, the protrusion 26 fills the gap between the bottom 25 and the roller 28b between the pair of attachments 23. Furthermore, since the lower end of the contact portion 24 extends downward even outside the pair of attachments 23, it is possible to prevent the bamboo 10 from entering the gap around the bolt that fixes the attachment 23 to the bottom portion 25. can. In this embodiment, since the bamboo 10 with a diameter of 80 to 200 mm is targeted, the size of the contact part 24 of the chain hook 2 is, for example, 100 mm x 100 mm, and the downward protrusion amount of the protruding part 26 is 4 mm. , the width of the protrusion 26 is 16 mm. The sizes of the contact portion 24 and the protruding portion 26 are not particularly limited, and can be changed as appropriate depending on the size (diameter) of the target bamboo 10, the size of the roller chain 20, etc.

By making the contact part 24 of the chain hook 2 into a curved shape, when a large diameter bamboo 10, for example, 200 mm in diameter, is pushed by the chain hook 2, the contact part 24 has a curved shape as shown in FIG. 4(a). The contact part 24 contacts the rear end of the bamboo 10, the front side of the contact part 24 is slightly raised, and the rear end of the bamboo 10 moves upward along the curved shape of the contact part 24. Then, as the rear end of the bamboo 10 moves upward along the curved shape of the contact section 24, it becomes balanced, and the movement of the bamboo 10 along the contact section 24 is stopped (Fig. 4 (b) condition). At this time, since the rear end of the bamboo 10 is in a lifted state, the front end of the bamboo 10 is in a lowered state. In this way, when the front end of the bamboo 10 is lowered and the bamboo 10 is pushed down by the chain hook 2, the front end of the bamboo 10 is pressed downward, so the front end of the bamboo 10 bounces while pushing the bamboo 10. The chain hook 2 can stably push the bamboo 10. If the bamboo 10 is warped and bent, when the chain hook 2 begins to push the bamboo 10, the front end of the bamboo 10 tends to be raised as shown in FIG. 5(a). When a flat abutting part is used for the chain hook, if the front end of the bamboo 10 is lifted up and you continue to press it, the front end of the bamboo 10 can move freely, so the front end of the bamboo 10 will bounce or the front end will rise further. Because of this, a chain hook using a flat abutment part cannot stably press the bamboo 10 against the blade. In this embodiment, by pushing the rear end of the bamboo 10 with the chain hook 2 having the abutment part 24 having a curved shape, the front end of the bamboo 10 can be lowered even if it is warped, as shown in FIG. 5(b). It can be a state. By continuing to press the bamboo 10 with the front end of the bamboo 10 lowered by the chain hook 2, the bamboo 10 can be stably pressed against the cutter 5. When the bamboo 10 is tilted forward, the bamboo 10 is supported at two points with only the front and rear ends supported, and a gap can be created between the roller chain 20 and the outer peripheral surface of the bamboo 10. Even bent bamboo 10 can be stably pressed, and furthermore, when dividing bamboo 10 with knife 5, bent bamboo 10 moves along the fiber direction and breaks. It becomes like this.

Furthermore, by extending the lower end of the contact portion 24 of the chain hook 2 downward from the bottom portion 25, the following effects are achieved. The chain hook 2 advances forward while pushing the rear end of the bamboo 10, and when it passes the bamboo input part 4 and reaches the sprocket 22, the chain hook 2 begins to move downward along the sprocket 22. At this time, if there is a gap between the lower end of the contact portion 24 and the upper end of the roller chain 20, the lower side of the rear end of the bamboo 10 may be caught in the gap. When the rear end of the bamboo 10 is bitten, the rear end of the bamboo 10 is pushed downward by the chain hook 2, and the bamboo 10 cannot be separated from the chain hook 2, and the operation of the bamboo splitter 1 must be stopped. It will stop happening. However, as in the present embodiment, by extending the lower end of the contact part 24 downward and further inserting the protruding part 26 between the pair of attachments 23, the chain hook 2 and the roller chain 20 are By almost eliminating the gap in the bamboo 10, it is possible to prevent the rear end of the bamboo 10 from being caught in the gap. The shape of the chain hook 2 is not particularly limited, and the configuration, shape, size, etc. can be changed according to the diameter of the bamboo 10, etc., and multiple chain hooks can be prepared and replaced. It is possible.

In this embodiment, the sprocket drive section 3 is a motor. For example, if a motor with an output of 1.5 to 2.2 kW and a reduction ratio of 1/30 is used as the sprocket drive unit 3, the sprocket drive unit 3 can move the chain hook 2 at a speed of 20 to 25 m/min. Can be done. The worker feeds the bamboo 10 into the bamboo feeding section 4 to the chain hook 2 which moves at such a speed.

The bamboo input section 4 has a pair of inclined walls 42 extending diagonally upward from near both sides of the tension section of the roller chain 20, and a groove 41. The bamboo feeding section 4 is placed on a pedestal 11, and a sprocket drive section 3 is placed inside the pedestal 11. As shown in FIGS. 1 and 2, wheels 14 are attached to the four corners of the pedestal 11 on which the bamboo input section 4 is placed, so that the bamboo splitter 1 can be moved. It is also possible to leave the bamboo splitter 1 stationary without providing the wheels 14 on the frame 11. The groove 41 is formed of a C channel, and extends along the traveling direction of the chain hook 2. A tensioned portion of the roller chain 20 is located within the groove 41 . The roller chain 20 moves toward the cutter 5 in the groove 41 from the back to the front. The roller chain 20 coming out from the front end of the groove 41 is then reversed in its traveling direction by a sprocket 22 arranged before the bamboo input part 4. The roller chain 20 whose traveling direction has been changed travels below the groove 41 from front to back. Then, the roller chain 20 whose traveling direction has been changed to the opposite direction by the sprocket 22 disposed after the bamboo input section 4 enters into the groove 41 again. As shown in FIG. 1, the roller chain 20 circulates by moving up and down the groove 41 by the plurality of sprockets 22. Due to such movement of the roller chain 20, the chain hook 2 moves toward the cutter 5 within the bamboo input section 4.

As shown in FIG. 6, two inclined walls 42 are attached to the upper ends of both sides of the groove 41. The two inclined walls 42 extend diagonally upward from the upper ends of both sides of the groove 41 so as to widen. As shown in FIG. 6, the cross section of the bamboo input part 4 is formed into a substantially V-shape by a groove 41 and two inclined walls 42. In this embodiment, the bamboo input section 4 is configured to be able to input bamboo 10 having a diameter of 200 mm. When the bamboo 10 is thrown in ahead of the chain hook 2 in the direction of movement within the bamboo feeding part 4, the rear end of the bamboo 10 is pushed by the movement of the chain hook 2. The bamboo input section 4 is not limited to a form in which two inclined walls 42 are attached to the groove 41. For example, it is also possible to arrange the two slanted walls independently, without providing a groove at the bottom ends of the two slanted walls, and to make the bamboo input part have a form in which the bottom ends of the two slanted walls are separated. . In this type of bamboo input section, the chain hook 2 moves between the lower ends of the two inclined walls.

As shown in FIGS. 1 and 2, the blade 5 is disposed at the front in the traveling direction. The cutter 5 is spaced apart from the roller chain 20 by a predetermined distance so that the chain hook 2, which moves toward the cutter 5 inside the bamboo input section 4 and moves downward along the sprocket 22, does not come into contact with the cutter 5. and is fixed on the pedestal 11. As shown in FIG. 7, the blade 5 has a plurality of blades 51 (10 blades in this embodiment) arranged radially within a rectangular cylindrical outer circumferential wall 52. As shown in FIG. The area within a predetermined radius from the center of the cutter 5 (the area indicated by the imaginary line in FIG. 7) has a shape that is inscribed in a cone protruding toward the bamboo input portion 4. In this embodiment, the size of the cutter 5 is 350 x 350 mm, and the diameter of the circle shown by the imaginary line is 260 mm. By using the knife 5 of such a size, even when the bamboo 10 with a diameter of 200 mm is divided and spread, the bamboo 10 can be reliably divided. The bamboo splitter 1 of this embodiment can divide bamboo 10 having a diameter of 80 to 200 mm into ten pieces using the blade 5. The number of blades 51 is not limited to 10, and can be changed as appropriate depending on the number of pieces of bamboo 10 to be divided. The size and shape of the blade 51 can also be changed as appropriate. It is also possible to prepare in advance a plurality of blades 5 with different numbers and sizes of blades 51, and to exchange the blades 5 according to the size of the target bamboo 10, etc. In this embodiment, since the blade 5 has a rectangular shape when viewed from the front, when the bamboo 10 is divided by the blade 5, if the bamboo 10 with a large diameter protrudes from the circle indicated by the imaginary line of the blade 5, Further, even if the split bamboo 10b spreads over a wide range and protrudes from the circle indicated by the imaginary line of the cutter 5, the cutter 5 can divide the bamboo 10 at the outside of the circle indicated by the imaginary line. can. In this way, the blade 5 has a rectangular shape when viewed from the front, so that the bamboo 10 can be reliably divided. However, the front view of the cutter 5 is not limited to a rectangular shape, and it is also possible to change the front view of the cutter 5 to a circular shape or the like. The outer peripheral wall 52 is fixed to the frame 53. By removably attaching the outer peripheral wall 52 to the frame 53 with bolts or the like, the blade 5 can be easily replaced with various types of blades.

The cutter 5 is arranged so that the center (the tip of the part of the cutter 5 protruding toward the bamboo input part 4) is below the center of the bamboo 10 being pushed by the chain hook 2. When the chain hook 2 pushes the rear end of the bamboo 10 and moves forward, it finally moves downward along the sprocket 22. At this time, the chain hook 2 is in a state of pushing the rear end of the bamboo 10 downward. The height of the blade 5 is set so that the rear end of the bamboo 10 can pass through the blade 5 even when pushed downward. The bamboo splitter 1 of this embodiment is intended for bamboo 10 with a diameter of 80 to 200 mm, and since bamboo 10 with different diameters are divided, the height of the blade 5 is set based on the largest diameter of the bamboo 10. is set.

As shown in FIG. 8, the guide portion 6 has an entrance opening 61 that serves as an entrance for the split bamboo 10b divided by the cutter 5, and an exit opening 62 that serves as an exit for the split bamboo 10b. The guide section 6 is arranged on the pedestal 11. The guide section 6 guides the divided bamboo pieces 10b to the drawing rollers 7. Although the widths of the inlet opening 61 and the outlet opening 62 are the same, the outlet opening 62 has a horizontally elongated rectangular shape with a smaller height dimension than the inlet opening 61. The guide section 6 has an upper guide plate 63 and a lower guide plate 64 as guide surfaces for guiding the front end of the split bamboo 10b entered from the entrance opening 61 to the exit opening 62, and further includes two side guide plates 65. have. The upper guide plate 63 and the lower guide plate 64 are arranged so as to be inclined toward each other from the inlet opening 61 toward the outlet opening 62, respectively. The side guide plate 65 has a dimension in the height direction decreasing from the inlet opening 61 to the outlet opening 62 in accordance with the inclination of the upper guide plate 63 and the lower guide plate 64. The distance between the two side guide plates 65 is constant without changing. The guide section 6 presses the split bamboo 10b from above and below with the guide surface, spreads it laterally, guides it to the exit opening 62, and guides the split bamboo 10b to the drawing roller 7 as it is. . Furthermore, as shown in FIG. 9, the guide part 6 lowers the height by arranging the split bamboos 10b laterally through the outlet opening 62, so that the drawing roller 7 can easily pull the split bamboos 10b. Depending on the relationship between the diameter of the bamboo 10 and the distance between the two side guide plates 65, when the split bamboo 10b comes into contact with the two side guide plates 65, the two side guide plates 65 also function as guide surfaces. As shown in FIGS. 1 and 2, a lower plate 66 is provided between the guide portion 6 and the cutter 5. As shown in FIGS. The lower plate 66 is connected to the lower guide plate 64 by being inclined slightly upward toward the lower guide plate 64 from the flat portion. The lower plate 66 prevents the front end of the split bamboo 10b sent from the cutter 5 from hanging down and protruding from the guide part 6, and guides the front end of the split bamboo 10b smoothly into the entrance opening 61.

The split bamboo 10b divided by the cutter 5 is sent to the entrance opening 61 of the guide part 6 in a state in which the cross section of the bamboo 10 before being split is expanded in the radial direction. Thereafter, when the front end of the split bamboo 10b moves within the guide portion 6 to the exit opening 62, the front end of the split bamboo 10b comes into contact with the upper guide plate 63 and the lower guide plate 64, which are guide surfaces. When the front end of the split bamboo 10b is pressed from above and below by the upper guide plate 63 and the lower guide plate 64, which are guide surfaces, it spreads laterally. Since the cross-section of the split bamboo 10b is a sub-arc shape or a flat shape, when the front end of the split bamboo 10b approaches the exit opening 62 while contacting the guide surface, the split bamboo 10b becomes in a state of expanding laterally. The front ends of the split bamboos 10b passing through the outlet opening 62 are deformed from a substantially circular shape spread in the radial direction, and are arranged in two to three layers vertically as shown in FIG. As the split bamboos 10b pass through the guide section 6 in this manner, the split bamboos 10b are sent to the drawing roller 7 in a state where they are lined up in the horizontal direction.

As shown in FIG. 10, the two retraction rollers 7 are provided with a plurality of protrusions 71 on their surfaces, and are placed vertically at a predetermined interval so that the split bamboo 10b that has passed through the guide section 6 is inserted between them. One is placed. The two pull-in rollers 7 are arranged in front of the outlet opening 62 such that the gap between the two pull-in rollers 7 is located within the range of the outlet opening 62 of the guide part 6 . The two pull-in rollers 7 are supported by two supports 75 at intervals that allow the split bamboo 10b to be inserted therethrough. The distance between the front ends of the protrusions 71, where the two retracting rollers 7 are closest, is set to a value close to the thickness of the bamboo 10. In this embodiment, as shown in FIG. 11, the protrusion 71 utilizes a substantially conical tip of a hexagon socket set screw 72 with a toe tip. The set screws 72 with hexagonal sockets are arranged on the cylindrical roller body 70 at predetermined intervals. The roller main body 70 is provided with a plurality of screw holes 73 at predetermined intervals for inserting and engaging hexagon socket head setscrews 72 therein. In this embodiment, the roller body 70 is provided with 14 rows of eight screw holes 73 arranged at equal intervals in the circumferential direction. At this time, the screw holes 73 in adjacent rows are arranged alternately in the circumferential direction. In this embodiment, the thickness of the cylindrical portion of the roller body 20 is 6 mm, and an M8 hexagon socket set screw 72 and nut 74 are used. The thickness of the roller main body 20 and the size of the hexagon socket set screw 72 and the nut 74 are not particularly limited. Insert and engage the hexagon socket head set screw 72 from the outside of the roller body 70, and then engage the nut 74 with the hexagon socket head set screw 72 on the outer peripheral surface of the roller body 70. When the hexagon socket head set screw 72 is fixed to the roller body 70, the tip of the hexagon socket head set screw 72 protrudes from the nut 74. In this embodiment, the substantially conical tip portion of the hexagon socket set screw 72 with a toggle tip that protrudes from the nut 74 is used as the protrusion 71 . Since the protrusion 71 sticks into the surface of the split bamboo 10b, the pull-in roller 7 can reliably pull in the split bamboo 10b. At this time, since the interval between the drawing rollers 7 is set to a value close to the thickness of the bamboo 10, when the split bamboo 10b is inserted between the two drawing rollers 7, the joints 10a of the split bamboo 10b break and are removed. be done. The protrusion 71 is not limited to the one using the hexagon socket head set screw 72 as in this embodiment, and other forms are also possible. Further, the number, spacing, arrangement, etc. of the hexagon socket head set screws 72 are not limited to the present embodiment. The retracting roller may have no protrusions, and the surface of the roller body may be processed so that the bamboo 10 can be retracted, or the roller body may be made of rubber or the like.

In the bamboo splitting machine 1 of this embodiment, as shown in FIG. 12, a pull-in roller drive unit 30 uses a chain 31 to rotate two pull-in rollers 7 simultaneously in opposite directions with one motor. . The chain 31 is stretched around a sprocket 32 of the motor, a sprocket 34 fixed to a support 75, and two sprockets 33 attached to the rotating shafts of the two pull-in rollers 7. A cover 77 is provided above the pull-in roller 7, and the pull-in roller 7 is covered by the cover 77. In order to rotate the two retraction rollers 7, it is also possible for the retraction roller drive unit 30 to use two motors. An elastic member 76 for vertically movably holding the upper retraction roller 7 is built into each of the two pillars 75 . If the split bamboo 10b gets stuck between the two pull-in rollers 7 while the split bamboo 10b is being pulled in by the pull-in roller 7, the two pull-in rollers 7 may stop rotating. In order to prevent such rotation of the pull-in roller 7 from stopping, the upper pull-in roller 7 is held by an elastic member 76 so as to be movable up and down. When the split bamboo 10b is about to get jammed between the two pull-in rollers 7, force acts on the two pull-in rollers 7, but since the lower pull-in roller 7 does not move, the upper side held by the elastic member 76 As the retracting rollers 7 move upward, the distance between the two retracting rollers 7 becomes wider. When the distance between the two pull-in rollers 7 is widened, the split bamboo 10b can pass between the two pull-in rollers 7 without getting jammed, so that the rotation of the two pull-in rollers 7 can be prevented from stopping.

As shown in FIGS. 1 and 2, the bamboo splitting machine 1 of the present embodiment is provided with a temporary placement section 8 for temporarily placing the split bamboo 10b in front of the pull-in roller 7. Instead, it is also possible to arrange a chipper or the like and turn the split bamboo 10b into chips as is. Since the split bamboos 10b that have passed between the two drawing rollers 7 are lined up side by side, they are moved to the temporary storage section 8, and the split bamboos 10b are temporarily placed one after another. In this embodiment, as shown in FIG. 13, the temporary storage section 8 has two side walls 81 and a bottom surface 82 extending along the direction of movement of the split bamboo 10b. The temporary storage section 8 is open on the drawing roller 7 side. When the split bamboos 10b are sent from the pull-in roller 7 to the temporary storage section 8, the split bamboos 10b, which have been divided into pieces and lined up in the horizontal direction, are temporarily placed in order.

In this embodiment, the bamboo splitter 1 further includes two rollers 9. Two rollers 9 are provided at the front end of the bamboo input section 4. As shown in FIG. 14, the two rollers 9 are arranged symmetrically with respect to the roller chain 20. At the front end of the bamboo input section 4, the two rollers 9 are arranged diagonally so that the central axes G of the two rollers 9 intersect below the bamboo 10, as shown in FIG. The roller 9 is rotatably attached to the tip of the arm 91. The arm 91 is provided with a shaft 93, and the shaft 93 is rotatably supported by a bearing 44 provided in the bamboo input section 4. Further, an elastic means 92 is connected to the rear end of the arm 91. In this embodiment, a spring is used as the elastic means 92, and the end of the spring is fixed to the pedestal 11.

A downward force is applied to the rear end of the arm 91 by an elastic means 92 . In the state shown in FIG. 14, a force is applied to the arm 91 in a direction to rotate the roller 9 upward about the shaft 93 due to the elastic force of the elastic means 92. In order to hold the roller 9 in the state shown in FIG. 14, a convex portion 94 is provided between the roller 9 and the shaft 93. The convex portion 94 comes into contact with the outer surface of the inclined wall 42 of the bamboo input section 4, the rotation of the arm 91 is stopped, and the roller 9 is held in the bamboo input section 4 in the state shown in FIG.

The two rollers 9 position the bamboo 10 with respect to the cutter 5 in the left-right direction with respect to the traveling direction of the chain hook 2, and press the bamboo 10 against the cutter 5 at an appropriate position. The vicinity of the front end of the bamboo 10 that has been pushed forward by the chain hook 2 is in contact with the roller chain 20 within the bamboo input section 4. At this time, since there is nothing to fix the front end of the bamboo 10, until the front end of the bamboo 10 reaches the roller 9, the front end of the bamboo 10 is not only in contact with the roller chain 20, but also The front end may move laterally and come into contact with the groove 41, the inclined wall 42, etc. Therefore, the bamboo 10 does not necessarily move in the center of the bamboo input section 4 in the left-right direction, nor does it always move at the same position within the bamboo input section 4. Further, the bamboo 10 is not always straight, but may be curved, and the front end of the bamboo 10 is not necessarily located at the center of the bamboo input section 4 in the left-right direction. Therefore, two rollers 9 are used to position the front end of the bamboo 10 in the left-right direction and press it against the cutter 5.

When the bamboo 10 is sent out from the bamboo input section 4, the front end of the bamboo 10, which is downwardly facing forward, comes into contact with the two rollers 9. At this time, since the two rollers 9 can rotate downward around the shaft 93, depending on the position and size of the bamboo 10, the two rollers 9 may be rotated slightly downward. The bamboo 10 is supported from below and moved so that it is evenly supported by two rollers 9. As a result, the bamboo 10 moves away from the roller chain 20 and moves directly above the roller chain 20, as shown in FIG. At this time, the center of the bamboo 10 in the left-right direction is aligned with the blade 5. That is, the two rollers 9 position the bamboo 10 with respect to the cutter 5 in the left-right direction with respect to the traveling direction of the chain hook 2. The heightwise position of the bamboo 10 is determined by being held at a predetermined height by two rollers 9. The two rollers 9, the chain hook 2, and the blade are arranged so that the center of the bamboo 10 held by the two rollers 9 is above the center of the blade 5 (the tip of the blade 5 whose shape is inscribed in the cone). 5 is set. Therefore, the two rollers 9 position the bamboo 10 at an appropriate position not only in the left-right direction but also in the height direction.

In order to hold the bamboo 10 by the two rollers 9, the lower end of the chain hook 2 is at a height that abuts the rollers 9, as shown in FIG. Therefore, when the chain hook 2 passes between the two rollers 9, especially when the roller chain 20 moves in the opposite direction to the traveling direction for some reason, the chain hook 2 comes into contact with the two rollers 9. At this time, since the arm 91 is held by the elastic means 92, when the two rollers 9 are pushed downward by the chain hook 2, the two rollers 9 can rotate downward, so that the roller 9 and the chain hook Interference with 2 can be prevented.

When the bamboo 10 is divided by the bamboo splitting machine 1 of this embodiment, as shown in FIGS. It is in a state of being pushed by. Even after the chain hook 2 leaves the rear end of the bamboo 10, the divided bamboo 10b is still being pulled in by the retracting roller 7, so the bamboo 10 passes smoothly through the cutter 5 to the rear end, ensuring that the bamboo 10 reaches the rear end. be divided. However, if the speed at which the pull-in roller 7 pulls in the split bamboo 10b and the speed at which the chain hook 2 pushes the rear end of the bamboo 10 are the same, if there is a delay in the pull-in roller 7 pulling in the split bamboo 10b, the chain hook 2 The situation is such that the rear end of the bamboo 10 continues to be forcefully pressed. As a result, for example, the split bamboo 10b may be pushed into the drawing rollers 7 excessively, and the split bamboo 10b may become jammed between the two drawing rollers 7. In order to cope with the delay in the pull-in operation of the split bamboo 10b by the pull-in roller 7, the sprocket drive unit is set so that the speed at which the pull-in roller 7 pulls in the split bamboo 10b is slightly faster than the speed at which the chain hook 2 pushes the bamboo 10. It is preferable that the bamboo splitting machine 1 includes a setting means 12a for setting the drive roller drive section 3 and the retraction roller drive section 30. In this embodiment, the bamboo splitting machine 1 uses the sprocket drive unit 3 and the pull-in roller drive so that the speed at which the split bamboo 10b is pulled in by the pull-in roller 7 is approximately 5% faster than the speed at which the chain hook 2 pushes the bamboo 10. A setting means 12a for setting the section 30 is provided. The setting means 12a is provided in an operation panel 12 provided below the bamboo input section 4.

The operation of dividing the bamboo 10 by the bamboo splitter 1 of the first embodiment will be explained using the drawings. First, the worker puts bamboo 10 into the bamboo feeding part 4. The timing at which the worker inserts the bamboo 10 is when one chain hook 2 is positioned behind the bamboo inserting section 4, and the worker inserts the bamboo 10 in front of the chain hook 2 in the bamboo inserting section 4. throw into. At this time, another chain hook 2 is located in front of the bamboo input section 4. In this embodiment, a worker is placed in the bamboo inputting section 4, and the bamboo 10 is manually inputted into the bamboo inputting section 4. However, it is also possible to stock a plurality of bamboos 10 in advance and provide a separate device next to the bamboo splitter 1 for feeding the stocked bamboos 10 one by one to the bamboo input section 4. When the chain hook 2 moves forward and the contact part 24 contacts the rear end of the bamboo 10, the rear end of the bamboo 10 moves slightly upward along the contact part 24 of the chain hook 2. When balance is achieved during the movement, the vicinity of the upper end of the contact portion 24 contacts the rear end of the bamboo 10, and the upward movement of the bamboo 10 is stopped. In particular, when the diameter of the bamboo 10 is large, the upper end of the contact part 24 with a width of 100 mm is inside the cylindrical bamboo 10, so that the contact part 24 is inside the rear end of the bamboo 10. When they come into contact with each other, it becomes easier to stop the bamboo 10 from moving upward. In this manner, while the movement of the rear end of the bamboo 10 is stopped, the chain hook 2 moves inside the bamboo input section 4 and pushes the bamboo 10 forward. At this time, as shown in FIG. 4(b), the bamboo 10 is pushed by the chain hook 2 in a state where the rear end is lifted and the bamboo is slightly lowered forward. The vicinity of the front end of the bamboo 10 being pushed by the chain hook 2 is pressed against the roller chain 20, and the front end of the bamboo 10 moves together with the roller chain 20, so that the bamboo 10 can be stably moved to the two rollers 9. It can be moved. After that, when the front end of the bamboo 10 comes into contact with the two rollers 9, the front end of the bamboo 10 passes forward being pressed against the two rollers 9, so even if the front end of the bamboo 10 bounces a little, Since the front end of the bamboo 10 is never higher than the rear end and easily returns to its original front-down state, the chain hook 2 can press the bamboo 10 against the knife 5 in a stable state.

When the front end of the bamboo 10 comes into contact with the roller 9, the bamboo 10 is positioned by the two rollers 9 so that the centers of the bamboo 10 and the blade 5 in the left-right direction coincide. Thereafter, the front end of the bamboo 10 is pressed against the knife 5, and the bamboo 10 is divided into a plurality of pieces by the knife 5. When the front end of the bamboo 10 is first split by the knife 5, the bamboo 10 is in a state where the crack reaches near the next node 10a. When the front end of the bamboo 10 is split by the cutter 5, the front end of the bamboo 10 goes further down and the rear end tries to jump up, but this is because the curved contact part 24 is pushing the rear end of the bamboo 10. , it is possible to prevent the rear end of the bamboo 10 from jumping up significantly. When the chain hook 2 pushes the rear end of the bamboo 10 and the next knot 10a of the bamboo 10 approaches the cutter 5, the cutter 5 splits the next knot 10a that has not yet been split, as shown in Figs. 16 and 17. As shown, the crack reaches the next node 10a. In this way, when the bamboo 10 is divided by the blade 5 up to one node 10a, the blade 5 continues to divide the bamboo 10 while repeating a state in which cracks occur up to the next node 10a. When the bamboo 10 is divided with the blade 5, the forward and downward inclination of the bamboo 10 decreases and the condition changes, but the abutment part 24 having a curved shape is able to handle changes in the inclination of the bamboo 10. Regardless, the contact portion 24 can contact the rear end of the bamboo 10 until the end, and the contact portion 24 can continue to stably press the rear end of the bamboo 10.

The front end of the split bamboo 10b passes through the entrance opening 61 of the guide section 6 and is fed into the guide section 6. At this time, the rear end of the bamboo 10 continues to be pushed forward by the chain hook 2. When the split bamboo 10b enters the guide portion 6 through the entrance opening 61, the front end of the split bamboo 10b, which has spread in the radial direction, comes into contact with the upper guide plate 63 and the lower guide plate 64, which are guide surfaces. Since the upper guide plate 63 and the lower guide plate 64 approach each other as they go toward the exit opening 62, the front end of the split bamboo 10b is pressed from above and below, and the shape of the front end of the split bamboo 10b is as follows. It deforms from a substantially circular state and becomes a state where it spreads out laterally. When the split bamboos 10b pass through the exit opening 62, the split bamboos 10b are arranged in two layers side by side, as shown in FIG. At this time, the split bamboo 10b may have three layers depending on the degree of overlapping.

The front end of the split bamboo 10b that has passed through the exit opening 62 is drawn between two drawing rollers 7, as shown in FIGS. 16 and 17. When the split bamboo 10b passes between the two pull-in rollers 7, the protrusion 71 catches the split bamboo 10b, so that the pull-in roller 7 pulls out the split bamboo 10b from the guide section 6, and further, the pull-in roller 7 pulls out the split bamboo 10b. Send 10b to the next location. When the split bamboo 10b is inserted between the two pull-in rollers 7, the split bamboo 10b is pressed from above and below by the pull-in rollers 7, so that the joints 10a of the split bamboo 10b are broken and removed. Since the distance between the front ends of the protrusions 71 of the two pulling rollers 7 is set to be close to the thickness of the bamboo 10, while the pulling roller 7 is pulling in the split bamboo 10b, the pulling roller 7 It is also possible to remove the node 10a. In particular, when two or three layers of bamboo 10 with a large diameter are inserted through the drawing roller 7, the thickness of the bamboo 10 is also large, so that the drawing roller 7 can easily split the nodes 10a of the split bamboo 10b. Furthermore, the 10-divided bamboo 10b that has passed between the two pulling rollers 7 is pressed up and down by the protrusion 71, so that the height becomes lower as shown in FIG. 16, and as shown in FIG. They are wide and lined up flat. In this way, the split bamboo 10b that has passed between the two pull-in rollers 7 spreads laterally and is sent to the next location, for example, the temporary storage section 8, by the pull-in rollers 7 in a state where it is bundled to some extent. . The split bamboo 10b is crushed with a chipper or the like and used as fuel.

By the time the chain hook 2 moves downward along the sprocket 22, depending on the position of the node 10a, the bamboo 10 has been cracked to the rear end, and the lower part of the rear end of the cracked bamboo 10 has been cracked. A part of the contact portion 24 is pressed against the lower end of the contact portion 24 . In this embodiment, by extending the lower end of the contact part 24 downward and further providing the protruding part 26, there is a gap between the lower end of the contact part 24 and the upper end of the roller chain 20. Since there is no gap in which a part of the rear end of the bamboo 10 can be caught, the rear end of the bamboo 10 will not be caught in the chain hook 2. The chain hook 2 can continue to press the rear end of the bamboo 10 in a stable state until the end due to the curved abutment part 24. When the chain hook 2 can no longer push the bamboo 10 and the pulling roller 7 is pulling in the divided bamboo 10b, the next bamboo 10 is thrown into the bamboo insertion part 4. At that time, the other chain hook 2 has moved into the bamboo input section 4, so the other chain hook 2 starts pushing the next bamboo 10.

In the bamboo splitting machine 1 of this embodiment, the rear end of the bamboo 10 is kept pressed by the chain hook 2 for a certain period of time after the split bamboo 10b is pulled in by the pulling roller 7. Even after the chain hook 2 leaves the rear end of the bamboo 10, the bamboo 10 is still being pulled in by the retracting roller 7, so the force that moves the bamboo 10 continues to act on the bamboo 10 without interruption. The bamboo 10 passes through the knife 5 smoothly until the end, is reliably divided to the rear end of the bamboo 10, and is sent to the next location. The bamboo splitter 1 of this embodiment can perform the operation of pressing the bamboo 10 against the blade 5 and the operation of removing the split bamboo 10b from the blade 5 in parallel for a certain period of time. Then, the bamboo splitter 1 can pull in the split bamboo 10b with the pull roller 7 and move it away from the cutter 5, so the split bamboo 10b that was split earlier does not remain in the vicinity of the cutter 5 and become a hindrance. The next bamboo 10 can be divided smoothly and continuously. Therefore, the bamboo splitting machine 1 of this embodiment can move the split bamboo 10b from the blade 5 and reliably split the bamboo 10 up to the rear end, so that it can continuously and smoothly split a large amount of bamboo 10.

Next, a bamboo splitter 1a according to a second embodiment will be explained. As shown in FIGS. 18 and 19, the bamboo splitting machine 1a of the second embodiment is the bamboo splitting machine 1 of the first embodiment provided with a sensor 13, a control device 15, and a determining means 16. . The configuration other than the sensor 13, the control device 15, and the determination means 16 is the same as the bamboo splitter 1 of the first embodiment, and therefore will be described using the same reference numerals and detailed description will be omitted.

As shown in the side view of FIG. 18 and the plan view of FIG. 6, two retracting rollers 7, a retracting roller driving section 30, a temporary storage section 8, two rollers 9, a sensor 13, a control device 15, and a determining means 16.

The sensor 13 is a sensor for detecting the diameter of the bamboo 10. In this embodiment, a photoelectric sensor is used as the sensor 13, and as shown in FIG. 13b is arranged outside the other inclined wall 42. Each of the two inclined walls 42 is provided with a hole 46 through which light from the photoelectric sensor passes. At this time, the positions of the light emitter 13a, the light receiver 13b, and the hole 46 of the inclined wall 42 are arranged at a predetermined height depending on the diameter of the bamboo 10 to be detected. In this embodiment, the light emitter 13a, the light receiver 13b, and the hole 46 of the inclined wall 42 are arranged so as to detect that the diameter of the bamboo 10 is 180 mm or more. In this way, the sensor 13 is arranged to detect the diameter of the bamboo 10 passing through the bamboo input section 4 using light. It is also possible to use other sensors as the sensor. Even when a photoelectric sensor is used as a sensor, the present invention is not limited to this embodiment, and it is also possible to arrange a light emitter/receiver and a reflecting plate, or to arrange only a light emitter/receiver.

The control device 15 performs control to temporarily stop the movement of the chain hook 2. In order to temporarily stop the progression of the chain hook 2, the control device 15 controls the sprocket drive unit 3. The determining means 16 determines whether the split bamboo 10b is being pulled in by the pulling roller 7 and the rear end of the bamboo 10 is being pushed by the chain hook 2. As shown in FIG. 18, the control device 15 and the determination means 16 are arranged in an operation panel 12 provided below the bamboo input section 4. The positions of the control device 15 and the determining means 16 are not particularly limited, and they may be placed at other locations. Moreover, it is also possible to perform other controls of the bamboo splitter 1a by the control device 15. For example, it is also possible for the control device 15 to have the function of the setting means 12a for setting the sprocket drive section 3 and the retraction roller drive section 30.

When the diameter of the bamboo 10 split by the bamboo splitter 1a is large, depending on the shape of the chain hook 2, etc., the pulling roller 7 may not be able to smoothly insert the split bamboo 10b. For example, when the split bamboo 10b is divided and arranged in two layers, upper and lower, the upper layer of split bamboo 10b is first drawn into the drawing roller 7, and the lower layer of split bamboo 10b is drawn into the drawing roller 7 later. It may become. If the chain hook 2 continues to push the bamboo 10 in such a state, the chain hook 2 will hold down the rear end of the bamboo 10, and there is a possibility that the bamboo 10 cannot be pushed straight. In order to solve the problem caused by the state in which the lower layer of the split bamboo 10b is being drawn into the drawing roller 7 with a delay, the sensor 13, the control device 15, and the determining means 16 are used. The sensor 13 detects that the diameter of the bamboo 10 is larger than a predetermined value, and the determining means 16 further detects that the divided bamboo 10b is pulled in by the pull-in roller 7 and the rear end of the bamboo 10 is pushed by the chain hook 2. If the control device 15 determines that the chain hook 2 is in such a state, the control device 15 temporarily stops the movement of the chain hook 2, and then performs control to restart the movement of the chain hook 2.

In this embodiment, the bamboo 10 with a length of about 1.8 m is targeted. In this case, when the bamboo 10 is divided by the cutter 5 to about half the length, the control device 15 controls the chain hook 2. Performs control to temporarily stop. The time during which the control device 15 temporarily stops the chain hook 2 is set to 1 second. The time t from when the sensor 13 detects that the diameter of the bamboo 10 is larger than a predetermined value until the length of the bamboo 10 is divided into half is input into the determination means 16 as data in advance. . When the determining means 16 receives a signal from the sensor 13 indicating that the diameter of the bamboo 10 is larger than a predetermined value, the determining means 16 determines that the divided bamboo 10b is pulled in by the retracting roller 7 and the bamboo 10 is It is determined whether the rear end of the chain hook 2 is being pressed. When the determining means 16 receives a signal from the sensor 13 indicating that the diameter of the bamboo 10 is larger than a predetermined value and time t has elapsed, the determining means 16 determines that the divided bamboo 10b has been pulled in by the pulling roller 7. Therefore, it is determined that the rear end of the bamboo 10 is being pushed by the chain hook 2. The determining means 16 notifies the control device 15 of the determination result, that is, that it is the timing to temporarily stop the chain hook 2.

When the control device 15 receives the notification from the determination means 16, the control device 15 performs control to stop the sprocket drive unit 3 for one second in order to stop the chain hook 2 for one second. While the control device 15 stops the chain hook 2 for one second, the bamboo 10 is moving forward as the retracting roller 7 is pulling in the split bamboo 10b, and the chain hook 2 is moving forward. The rear end is not pressed. Therefore, the bamboo splitting machine 1a of the present embodiment can solve the problem of a delay in drawing in the split bamboo 10b by the drawing roller 7 due to the large diameter of the bamboo 10. Thereby, the bamboo splitter 1a can more smoothly split the bamboo 10 even if the bamboo 10 has a large diameter. The time when the chain hook 2 is temporarily stopped by the control device 15 and the timing at which the chain hook 2 is stopped can be changed as appropriate depending on the length of the bamboo 10, the overall length of the bamboo splitter 1a, and the like. The determining means 16 is not limited to this embodiment, but uses a sensor or the like to determine the state of the bamboo 10 by detecting the position of the bamboo 10, and causes the control device 15 to temporarily stop the chain hook 2. It is also possible to notify that the timing is right. It is also possible for the control device 15 to have the function of the determining means 16.

The operation of dividing the bamboo 10 by the bamboo splitter 1a of this embodiment will be explained. First, the worker inserts the bamboo 10 into the bamboo inserting section 4 before the chain hook 2. The chain hook 2 moves forward, and the abutment part 24 begins to push the rear end of the bamboo 10. When the bamboo 10 pushed by the chain hook 2 passes between the light emitter 13a and the light receiver 13b of the sensor 13, the sensor 13 detects whether the diameter of the bamboo 10 is larger than a predetermined value. In this embodiment, the sensor 13 detects whether the diameter of the bamboo 10 is 180 mm or more. When the diameter of the bamboo 10 is less than 180 mm, the bamboo splitter 1a does not need to temporarily stop the chain hook 2. Therefore, the bamboo splitter 1a operates in the same way as the bamboo splitter 1 of the first embodiment, and the chain hook 2 does not need to be temporarily stopped. To divide a bamboo 10 without temporarily stopping the progress of a hook 2.

When the sensor 13 detects that the diameter of the bamboo 10 is 180 mm or more, the determining means 16 receives a signal from the sensor 13 indicating that the diameter of the bamboo 10 is larger than a predetermined value (180 mm). Receive. At this time, the bamboo splitter 1a continues to push the bamboo 10 with the chain hook 2 and splits the bamboo 10 with the blade 5. Then, when the time t has elapsed since the determination means 16 received the signal from the sensor 13, the determination means 16 notifies the control device 15 that it is the timing to temporarily stop the movement of the chain hook 2. . Upon receiving the notification from the determining means 16, the control device 15 performs control to stop the sprocket drive unit 3 for one second, and the chain hook 2 stops for one second.

When the chain hook 2 is temporarily stopped, the chain hook 2 separates from the rear end of the bamboo 10 and is no longer able to push the bamboo 10. At this time, since the split bamboo 10b is being drawn in and moved by the drawing roller 7, the bamboo 10 continues to pass through the cutter 5 and is split. After the chain hook 2 stops for one second, the control device 15 drives the sprocket drive unit 3 again to restart the chain hook 2 from moving forward. When the chain hook 2 resumes its movement, the split bamboo 10b has already been moved forward by the pull-in roller 7. Therefore, the chain hook 2 does not push the bamboo 10 again, and the chain hook 2 continues to advance, and finally moves downward along the front sprocket 22. If for some reason there is a delay in pulling in the split bamboo 10b by the pull-in roller 7, the chain hook 2 can push the rear end of the bamboo 10 again, thereby pressing the bamboo 10 against the cutter 5. In this way, the bamboo splitting machine 1a of the second embodiment has a large diameter when the split bamboo 10b is pulled into the drawing roller 7 in two or three layers depending on the shape of the chain hook 2, etc. The situation where the rear end of the bamboo 10 is pressed down by the chain hook 2, which occurs when the chain hook 2 is stopped, can be resolved by temporarily stopping the chain hook 2.

The present invention can be used, for example, as a bamboo splitter for splitting bamboo for use as fuel chips.

1, 1a Bamboo splitter 2 Chain hook 20 Roller chain 21 Link plate 22 Sprocket 23 Attachment 24 Contact part 25 Bottom part 26 Projection part 27 Main body part 27a Wall 27b Top part 28a Pin 28b Roller 29 Notch 3 Sprocket drive part 30 Retraction roller drive Part 31 Chain 32 Sprocket 33 Sprocket 34 Sprocket 4 Bamboo input part 41 Groove 42 Slanted wall 44 Bearing 46 Hole 5 Cutting tool 51 Blade 52 Outer wall 53 Frame 6 Guide part 61 Inlet opening 62 Outlet opening 63 Upper guide plate 64 Lower guide plate 65 Side Part guide plate 66 Lower plate 7 Retracting roller 70 Roller body 71 Projection 72 Hexagon socket head set screw 73 Screw hole 74 Nut 75 Support 76 Elastic member 77 Cover 8 Temporary storage part 81 Side wall 82 Bottom surface 9 Roller 91 Arm 92 Elastic means 93 Shaft 94 Convex portion 10 Bamboo 10a Section 10b Split bamboo 11 Frame 12 Operation panel 12a Setting section 13 Sensor 13a Emitter 13b Light receiver 14 Wheel 15 Control device 16 Judgment section G Central axis

Claims (5)

a chain hook provided on a roller chain spanning a plurality of sprockets and moved by the rotation of the sprockets;
a sprocket drive unit that rotates the sprocket;
a bamboo input portion having a pair of inclined walls extending obliquely upward so as to expand from the vicinity of both sides of the tension portion of the roller chain;
a cutter disposed in front of the direction in which the chain hook travels (hereinafter referred to as the "traveling direction") when the portion of the roller chain where the chain hook is provided forms the tension section;
a guide portion disposed in front of the cutting tool in the traveling direction;
two retraction rollers arranged at an interval so that the split bamboo that has been split by the cutter and passed through the guide part is inserted between them;
a pull-in roller drive unit that rotates the pull-in roller so that the split bamboo inserted between the two pull-in rollers is pulled out from the guide portion;
Equipped with
The guide portion includes an entrance opening that serves as an entrance for the split bamboo that has been divided by the cutter, an exit opening that serves as an exit for the split bamboo that is smaller in height than the entrance opening, and a guide surface that guides the split bamboo to the exit opening;
The cutter has a plurality of blades arranged radially,
This bamboo splitting machine is characterized by: The chain hook has a contact portion that contacts the rear end of the bamboo,
The contact portion has a curved shape with a concave center in the vertical direction,
The bamboo splitting machine according to claim 1, characterized in that: Further comprising two rollers for positioning the bamboo in the left and right directions with respect to the traveling direction with respect to the blade before pressing the bamboo against the blade,
The two rollers are disposed diagonally symmetrically with respect to the roller chain at the front end of the bamboo input section so that the central axes of the two rollers intersect below the bamboo.
The bamboo splitting machine according to claim 1 or 2, characterized in that: comprising a setting means for setting the sprocket drive section and the drawing roller drive section so that the speed at which the split bamboo is drawn in by the drawing roller is faster than the speed at which the bamboo is moved by the chain hook;
When the front end of the split bamboo begins to be pulled in by the pull-in roller, the rear end of the bamboo is being pushed by the chain hook;
The bamboo splitting machine according to claim 1 or 2, characterized in that: A sensor for detecting the diameter of the bamboo, a control device, and a determining means for determining whether the split bamboo is being pulled in by the pulling roller and the rear end of the bamboo is being pushed by the chain hook. and further comprising:
When the sensor detects that the diameter of the bamboo is larger than a predetermined value, the control device controls the chain hook to temporarily stop.
A bamboo splitting machine according to claim 4.

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