Bamboo cutting apparatus

Abstract

To provide a bamboo material cutting device capable of supporting a bamboo material in a stable state regardless of the diameter of the bamboo material and cutting the bamboo material by a fixed cutting amount.SOLUTION: In a bamboo cutting device 1 including a lower frame 10, a cutting means 30 (circular saw 31) protruding upward from a surface of the lower frame 10, and a bamboo support member 50 installed on the lower frame 10 so as to be capable of traveling, the bamboo support member 50 has a pair of placement portions 52,52 arranged at an interval in a width direction of a bamboo 2, the placement portion 52 includes an inclined support surface 62 inclined downward toward an inner side, and the pair of placement portions 52,52 are provided so as to be capable of approaching and separating from each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a bamboo cutting device. [Background technology]

[0002] Patent Document 1 describes a bamboo cutting device that cuts bamboo material to produce long pieces. This bamboo cutting device has a bamboo material placement table that can run on two rails, with a circular saw installed between the rails. On the bamboo material placement table, support pieces that support the bamboo material are arranged facing each other with a gap in the width direction. The bamboo material receiving surfaces of the opposing support pieces are inclined so that they become lower as they go inward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 56-67205 Summary of the Invention [Problem to be solved by the invention]

[0004] In the bamboo cutting device described above, the opposing bamboo receiving surfaces are inclined in a V-shape, making it possible to place bamboo pieces of different diameters. However, different diameters of bamboo pieces necessitate different placement heights. Specifically, as the diameter of the bamboo pieces increases, the placement height increases, making the bamboo pieces more likely to shift sideways and reducing stability. Furthermore, changing the placement height changes the cutting depth of the circular saw blade, resulting in overcutting small-diameter bamboo and resulting in fewer pieces being harvested, or insufficient cutting depth for large-diameter bamboo, making it impossible to cut at all.

[0005] From this perspective, the objective of the present invention is to provide a bamboo cutting device that can support bamboo in a stable state and cut it with a constant cutting depth regardless of the diameter of the bamboo. [Means for solving the problem]

[0006] In order to solve the above problem, the present invention provides a bamboo cutting device comprising a lower frame, a cutting means protruding upward from the surface of the lower frame, and a bamboo support member installed on the lower frame so that it can move about, wherein the bamboo support member has a pair of mounting sections spaced apart in the width direction of the bamboo, the mounting sections have inclined support surfaces that slope downward as they go inward, and the pair of mounting sections are arranged so that they can move toward and away from each other. According to the bamboo cutting device of the present invention, the placement part can move closer to or farther away from the bamboo in the width direction, so the spacing can be adjusted appropriately according to the diameter of the bamboo. As a result, even if the bamboo diameter varies, the bamboo is placed at a constant height and held by the placement part from both sides, so the bamboo can be supported in a stable state and cut with a constant cutting depth.

[0007] In the bamboo cutting device of the present invention, the cutting means preferably comprises a plurality of circular saws and replaceable spacers interposed between the circular saws. With this configuration, the width of the bamboo strips to be produced can be changed as needed.

[0008] In addition, in the bamboo cutting device of the present invention, it is preferable that the lower frame is provided with a cover member that covers the cutting means. With this configuration, it is possible to prevent the cut bamboo from scattering.

[0009] Furthermore, in the bamboo cutting device of the present invention, it is preferable that the cutting means is located in the center of the lower frame in the width direction and the length direction, and that guide rails for the bamboo support member are laid parallel to each other on the upper surface of the lower frame so as to sandwich the cutting means from both sides in the width direction. With this configuration, the bamboo support member can be moved linearly easily and reliably. Furthermore, the bamboo supported by the bamboo support member can pass over the cutting means along its entire length. [Effects of the Invention]

[0010] According to the bamboo cutting device of the present invention, bamboo can be supported in a stable state and cut with a constant cutting depth regardless of the diameter of the bamboo. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an overall perspective view of a bamboo cutting device according to an embodiment. FIG. [Figure 2] 1A and 1B are diagrams showing a bamboo cutting device according to an embodiment, in which (a) is a plan view and (b) is a side view. [Figure 3] 1A, 1B, and 1C are diagrams showing the lower frame of a bamboo cutting device according to an embodiment, in which (a) is a plan view, (b) is a side view, and (c) is a front view. [Figure 4] 1A, 1B, and 1C are diagrams showing a bamboo material support member of a bamboo material cutting device according to an embodiment, in which (a) is a plan view, (b) is a side view, and (c) is a front view. [Figure 5] FIG. 2 is an enlarged front view of a main part of the bamboo cutting device according to the embodiment. [Figure 6] 1A and 1B are diagrams showing a bamboo material support member of a bamboo material cutting device according to an embodiment, in which (a) is an exploded perspective view and (b) is a perspective view. DETAILED DESCRIPTION OF THE INVENTION

[0012] A bamboo cutting device according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in Figures 1 and 2, the bamboo cutting device 1 according to this embodiment produces bamboo bars to be used in place of reinforcing bars in concrete structures, and comprises a lower frame 10, cutting means 30, and bamboo support members 50. The bamboo sinew is made from bamboo rods cut along the direction of the bamboo fibers. There are no restrictions on the type of bamboo that can be used to make the rods, and examples that can be used include madake, moso bamboo, atsudake, and metake.

[0013] As shown in Figure 3, the lower frame 10 is a frame located at the bottom of the bamboo cutting device 1, and supports the cutting means 30 and the bamboo support member 50. The lower frame 10 has a support plate portion 11 and legs 12.

[0014] The support plate 11 is a part that supports the bamboo support member 50 and is made of a metal plate. The support plate 11 has a long rectangular shape in a plan view, with a length of 5,400 mm and a width of 450 mm, for example. The support plate 11 has raised portions 13 at both ends in the width direction, giving it a groove-shaped cross section. The length of the support plate 11 is longer than the length of the bamboo support member 50, allowing the bamboo support member 50 to move on the support plate 11. A guide rail 14 is provided on the upper surface of the support plate 11. A pair of guide rails 14 are provided along the longitudinal direction of the support plate 11 and are arranged parallel to each other. The guide rails 14 are made of, for example, a 12φ round steel bar and are welded onto the support plate 11.

[0015] An opening 15 is formed in the middle of the support plate 11 in the longitudinal direction. The opening 15 is an opening that allows the upper end of a circular saw 31 of the cutting means 30, which will be described later, to protrude above the support plate 11. The opening 15 has a rectangular shape in a plan view and is large enough to allow the upper end of the circular saw 31 to pass through. The opening 15 is formed between a pair of guide rails 14, 14.

[0016] A cover member 16 (see Figure 1) is provided in the middle of the longitudinal direction of the support plate portion 11. The cover member 16 is formed by bending a mesh-like wire netting into a gate shape. The cover member 16 is positioned so as to cover the portion of the circular saw 31 of the cutting means 30 that protrudes above the support plate portion 11. In other words, the cover member 16 covers the area where the bamboo material 2 is cut, and can prevent the bamboo material 2 from scattering around if it is broken.

[0017] The legs 12 are members for holding the support plate 11 at a predetermined height, and are formed, for example, by a pair of square pipes 17, 17 extending in the vertical direction and connected by a horizontal member 18. A plurality of legs 12 (four in this embodiment) are provided at intervals in the longitudinal direction of the support plate 11. The upper end of the square pipe 17 is fixed to the underside of the support plate 11 via a bracket 19. A height adjuster 20 is provided at the lower end of the square pipe 17. The height of the legs 12 is adjusted by the adjuster 20 so that the support plate 11 is level.

[0018] As shown in Figures 1 and 2, the cutting means 30 is a device that cuts bamboo material along its longitudinal direction, and includes a circular saw 31, a spacer 32, a base 33, and a drive motor 34. Note that Figure 1 shows only the circular saws 31, 31 of the cutting means 30.

[0019] There are multiple circular saws 31 (a pair in this embodiment). The pair of circular saws 31, 31 have the same shape and rotate around the same rotation axis. The spacer 32 is a part that positions the pair of circular saws 31, 31 at a predetermined distance and is replaceably interposed between the circular saws 31, 31. The spacer 32 has a thickness that is equal to the width of the bamboo strips to be produced. In other words, the width of the bamboo strips to be produced can be changed by replacing the spacer 32 with one of a different thickness. The spacer 32 is fixed or locked to each circular saw 31 and rotates synchronously with the pair of circular saws 31, 31.

[0020] The base portion 33 is a portion that supports the circular saw 31 and the spacer 32. The base portion 33 is placed on a support frame 35 that is rectangular in plan view. Adjusters 36 for adjusting the height are provided at each of the four corners of the support frame 35. The drive motor 34 rotates the circular saw 31 and the spacer 32, and is fixed to the base portion 33. The drive motor 34 is connected to the circular saw 31 and the spacer 32 via a circular belt 37. The belt 37 is wound around the rotating shaft of the drive motor 34 and the outer circumferential surface of the spacer 32, and transmits the rotational force of the drive motor 34 to the circular saw 31 and the spacer 32.

[0021] As shown in Figures 4 to 6, the bamboo support member 50 is a part that supports the bamboo material 2 (see Figure 5), and is installed so that it can move on the support plate portion 11 of the lower frame 10. When the bamboo support member 50 moves on the support plate portion 11 while supporting the bamboo material 2, the supported bamboo material 2 passes over the upper ends of the circular saws 31, 31, and the bamboo material 2 is cut. In this embodiment, the bamboo support member 50 is moved manually by the operator. The bamboo support member 50 comprises a base portion 51 and a placing portion 52.

[0022] The base plate 51 is a member to which the mounting portion 52 is fixed, and is installed so as to be movable on the guide rails 14 of the support plate 11 of the lower frame 10. The base plate 51 is made of a metal plate. The base plate 51 has a long rectangular shape in a plan view, with a length of 3000 mm and a width of 370 mm, for example. In other words, the base plate 51 has a width that allows it to be installed on the support plate 11, and it is movable along the longitudinal direction within the length of the support plate 11. The base plate 51 includes side plates 53, 53 and a connecting portion 54.

[0023] The side plate portions 53 are formed of elongated material that extends over the entire length of the base plate portion 51. A pair of side plate portions 53 are provided, and are arranged at an interval on both sides of the width of the base plate portion 51. The side plate portions 53 have rising portions 55 and hanging portions 56 formed on both sides of the width, respectively, and have a crank-shaped cross section. The rising portions 55 are arranged on the outside of the base plate portion 51, and the hanging portions 56 are arranged on the center side of the base plate portion 51.

[0024] The connecting portions 54 connect the spaced-apart side plates 53, 53 to each other, and are provided at both longitudinal ends of the base plate 51. The connecting portions 54 are rectangular in plan view, and have hanging portions 57 at both widthwise ends. The hanging portions 57 have the same height as the hanging portions 56 of the side plate 53, and are welded to the hanging portions 56 while abutting against them. The connecting portions 54, 54 integrate the side plates 53, 53 on both sides, and the upper end of the circular saw 31 is inserted into an opening defined by the side plates 53, 53 and the connecting portions 54, 54.

[0025] Wheels 58 are provided on the underside of the side plate portions 53. The wheels 58 are shaped like pulleys with a recess in the center in the width direction, and are capable of rotating and moving on guide rails 14 made of round steel bars. The wheels 58 are rotatably supported via a pair of brackets 59, 59 welded to the underside of the side plate portions 53.

[0026] Handles 60, which are U-shaped in plan view, are provided at both longitudinal ends of the side plate 53. The handles 60 are the parts that an operator holds when moving the bamboo support member 50. The handles 60 are formed by bending a round steel bar into a U-shape. Both ends of the handles 60 are welded to the underside of the side plate 53.

[0027] The placing section 52 is the portion on which the bamboo material 2 is placed, and is composed of long materials 61 extending along the longitudinal direction of the base section 51. A pair of long materials 61 are arranged, and the long materials 61 are respectively installed on a pair of side plate sections 53, and are arranged at a predetermined interval along the width direction of the base section 51. The long materials 61 are composed of angle materials arranged in a mountain shape, and are equipped with inclined support surfaces 62 that support the bamboo material at an angle. The long materials 61 are provided over the entire longitudinal length of the side plate sections 53.

[0028] The elongated material 61 is bolted to the side plate portion 53 via a fixing bracket 63. The fixing bracket 63 has a rectangular shape extending in the width direction and is fixed to the outside of the elongated material 61 (the outside of the base portion 51 in the width direction). A plurality of fixing brackets 63 are provided at intervals in the longitudinal direction of the elongated material 61. In this embodiment, four fixing brackets 63 are provided, and they are arranged at equal intervals at both ends of the elongated material 61 in the longitudinal direction and at two locations between them. As shown in FIG. 6, a long hole 64 is formed in the fixing bracket 63. The long hole 64 is a hole through which a bolt for fixing the mounting portion 52 to the side plate portion 53 is inserted. The bolt is inserted through the long hole 64 and a bolt hole 65 (see FIG. 6(a)) formed in the side plate portion 53. The long hole 64 extends in the width direction of the bamboo support member 50, allowing the installation position of the mounting portion 52 to be adjusted in the width direction of the bamboo support member 50, and the spacing between the mounting portions 52, 52 to be changed.

[0029] When cutting bamboo sinews using the bamboo cutting device 1 configured as described above, first, spacers 32 corresponding to the width of the desired bamboo sinew are placed between the circular saws 31, 31, and set in the cutting means 30. Then, the distance between the mounting parts 52, 52 is adjusted according to the diameter of the bamboo material 2. Specifically, the spacing between the mounting parts 52, 52 is adjusted so that the center of the placed bamboo material 2 is at the same height as the upper end of the circular saw 31, and the bamboo material 2 is secured in place with bolts. After that, a rubber band (not shown) is hooked onto the bamboo material 2 to secure it to the mounting parts 52, 52.

[0030] In this state, while rotating the circular saws 31, 31, the worker grasps the gripping part 60 and moves the bamboo support member 50. As a result, the lower end of the placed bamboo material 2 passes through the upper end of the circular saws 31, 31 and is cut to a width equal to the width dimension of the spacer 32 (see Figure 5). In addition, since the circular saws 31, 31 reach the center of the bamboo material 2, it is possible to cut the cross section of the bamboo joint. The rotation speed of the circular saws 31, 31 is set appropriately depending on the hardness of the bamboo material 2 and the cutting length.

[0031] According to the bamboo cutting device 1 of this embodiment, the placing part 52 can move closer to and away from the bamboo support member 50 in the width direction, i.e., the width direction of the bamboo material 2, so the spacing can be adjusted appropriately according to the diameter of the bamboo material 2. As a result, even if the diameter of the bamboo material 2 varies, the placing part 52 positions the bamboo material 2 at a constant height, so the bamboo material 2 can be supported in a stable state and cut with a constant cutting depth. Furthermore, because the rubber band is hooked onto the bamboo material 2, the bamboo material 2 does not float up, so the bamboo material 2 can be cut reliably.

[0032] In addition, in the bamboo cutting device 1 of this embodiment, the cutting means 30 includes multiple circular saws 31 and replaceable spacers 32 between them, allowing for easy adjustment of the width of the bamboo stalks 2 to be produced. Furthermore, the lower frame 10 is provided with a cover member 16 that covers the cutting portion of the cutting means 30, preventing the cut bamboo stalks 2 from scattering. The circular saws 31 of the cutting means 30 are located in the center of the lower frame 10 in both the width and length directions. Guide rails 14 supporting the bamboo support members 50 are laid parallel to each other on the upper surface of the lower frame 10, sandwiching the circular saws 31 of the cutting means 30 from both sides in the width direction. This allows the bamboo support members 50 to be moved linearly easily and reliably. Furthermore, the bamboo stalks 2 supported by the bamboo support members 50 can pass over the cutting position of the cutting means 30 along their entire length.

[0033] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and appropriate design modifications are possible without departing from the spirit of the present invention. For example, in the above-described embodiments, the elongated material 61 constituting the mounting portion 52 is an angle bar, but this is not limited thereto. Steel materials of other shapes may be used as long as they have an inclined support surface. Furthermore, the material of the mounting portion 52 is not limited to steel, but may be other materials such as resin or wood. Furthermore, in the above embodiment, the bamboo support member 50 is moved manually, but it may also be moved by an electric or hydraulic drive means, for example. [Explanation of symbols]

[0034] 1 Bamboo cutting equipment 2 Bamboo material 10 Lower Frame 14 Guide rail 16 Cover member 30 Cutting means 31 Circular Saw 32 spacer 50 Bamboo support member 52 Placement section 62 Inclined support surface

Claims

1. A bamboo cutting device comprising a lower frame, a cutting means protruding upward from the surface of the lower frame, and a bamboo support member installed on the lower frame so as to be able to move, The bamboo support member has a pair of mounting portions spaced apart in the width direction of the bamboo, The mounting portion has an inclined support surface that is inclined downward toward the inside, The pair of mounting portions are provided so as to be able to approach and move away from each other. A bamboo cutting device characterized by:

2. The cutting means includes a plurality of circular saws and spacers replaceably interposed between the circular saws.

2. The bamboo cutting device according to claim 1.

3. The lower frame is provided with a cover member that covers the cutting means.

2. The bamboo cutting device according to claim 1.

4. the cutting means is disposed at the center of the lower frame in the width direction and the length direction, On the upper surface of the lower frame, guide rails for the bamboo support member are laid parallel to each other so as to sandwich the cutting means from both sides in the width direction.

2. The bamboo cutting device according to claim 1.

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