JP2011041476A - Bamboo cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bamboo cutter easily and safely cutting a bamboo without making the cut surface of the bamboo get hangnails. <P>SOLUTION: The bamboo cutter includes: an openable ring-like frame 1; circular cutters 4 set up to a plurality of portions on the circumference of the frame 1; arms 5 freely rotatably hold the cutters 4; pressing means making the arms 5 turn with a focus on a rotary axis 14 to push out the cutters 4 to the inner peripheral side of the frame 1; and handle attaching/detaching means set up to a plurality of portions on the outer periphery of the frame 1 to rotate the frame 1 in its circumferential direction. The bamboo cutter is operated as follows: disposing the bamboo inside the frame 1; pressing the arms 5 with pressing screws 6 as the pressing means to make the cutters 4 firmly abut on the outer periphery of the bamboo; alternately attaching handles 7 to attachment cylinders 8 as the handle attachment/detachment means to rotate the frame 1 and simultaneously make the cutter bite into the outer periphery of the bamboo to cut the bamboo. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for cutting bamboo, and more particularly to a bamboo cutter used for cutting bamboo.

  Conventionally, saws are generally used for bamboo cutting, but no other logging device has been proposed. As an apparatus for cutting pipes such as plastic pipes or steel pipes instead of bamboo cutting apparatuses, for example, pipe cutters shown in Patent Document 1 to Patent Document 3 are known.

  In the invention of Patent Document 1, a pipe, which is a workpiece, is sandwiched between a metal saw and a roller that rotationally drive, and cut with a metal saw while pressing the roller with a feed screw mechanism.

  The invention of Patent Document 2 has a structure having upper and lower handles similar to a heel, and an upper jaw and a lower jaw are formed in a portion corresponding to the cutting edge of the heel, and a pair of rollers are provided on each of the upper and lower jaws. And cutting with a blade provided on the side of one jaw while rotating with a pipe as a workpiece.

  In the invention of Patent Document 3, a plurality of abacus-shaped circular cutters are arranged on the upper and lower sides of a pipe as a workpiece, and the upper cutter is cut and cut into a pipe by rotating while feeding it with a feed screw. It is.

  However, the conventional cutting with a saw has a problem that it takes time and the cutting edge can be rolled up, which makes it unsafe. The invention of Patent Document 1 is a method of processing with a metal saw that is driven by sandwiching a pipe with a roller, and the invention of Patent Document 2 is processed with a blade-like cutting tool while being sandwiched between rollers provided on upper and lower jaws. The invention of Patent Document 3 uses a abacus ball-like cutter similar to that of the present application, but processes one side of the cutter surrounding the pipe while rotating. Therefore, the configuration is different from the method of cutting each of the plurality of cutters provided on the circumference of the annular frame in this application while pressing the cutter against the surface of the bamboo.

JP 06-091426 A JP-A-10-216371 JP 2002-144141 A

  The problem to be solved is that the conventional saw cutting is time consuming and the cutting edge is raised and unsafe.

  In order to solve the above-described problems, the present invention provides an annular frame that can be opened and closed, a circular cutter provided at a plurality of locations on the circumference of the frame, an arm that rotatably holds the cutter, and the arm. Is provided at a plurality of locations on the circumference to rotate the frame in the circumferential direction by a handle. A rotating means, the bamboo is positioned inside the frame, the arm is pressed by the pressing means, the cutter is brought into strong contact with the outer periphery of the bamboo, and the frame is rotated by the rotating means. The cutter is cut into the outer periphery of the bamboo.

  The bamboo cutter of the present invention is a method in which a plurality of abacus ball-shaped cutters are attached to an annular frame, and each frame is rotated and cut while strongly contacting each cutter with the circumference of the bamboo. There is no pouring at the cut. As a result, the stump is safe and easy to operate and can be processed in a short time. In addition, while holding the bamboo with one hand, the cutter can be operated with the other hand, so even women and children can cut down safely. . Further, there is an advantage that it is not necessary to replace or re-grind the blade like a saw or a nata.

It is a perspective view which shows the outline of the whole bamboo cutter. Example 1 (A) is a top view of the latching | locking part which made one part a cross section, (b) is an AA arrow directional view of (a). Example 1 (A) is a front view of a cutter, (b) is a side view of the cutter. Example 1 (A) is a front view with a cross section showing a part of the pushing mechanism of the cutter, (b) is an AA arrow view with a part of (a) in cross section, (c) is a part of (a) FIG. Example 1 (A) is the front view which made the cross section a part which shows the extrusion mechanism of a cutter, (b) is the AA arrow directional view which made a part of (a) a cross section. (Example 2)

  The purpose of cutting the bamboo easily and safely without cutting off at the cut end has been realized with the bamboo cutter of the present invention that can be cut without using a conventional saw or nata.

  1 to 4 show the first embodiment of the invention, FIG. 1 is a perspective view showing the outline of the entire bamboo cutter, FIG. 2 (a) is a top view of a locking part partly in cross section, and FIG. FIG. 3A is a front view of the cutter, FIG. 3A is a front view of the cutter, FIG. 4A is a side view of the cutter, and FIG. (B) is an AA arrow view with a part of (a) in cross section, and (c) is an BB arrow view with a part of (a) in cross section.

  The bamboo cutter of the present invention is provided with a hinge 2 at one location on the circumference of the annular frame 1 shown in FIG. 1 and an opening 3 at another location on the circumference, and can be opened and closed via the hinge 2. Yes. Further, between the open ends of the open part 3, there is provided a locking means described later for fixing the annular shape when closed. Further, cutters 4 are rotatably provided at three locations on the circumference via an arm 5, and the cutter 4 is pushed out to the inside of the frame 1 by pressing the arm 5 with a push screw 6. In addition, mounting cylinders 8 for handwheels 7 serving as rotating means are provided at three locations on the circumference. The number of cutters 4 and mounting cylinders 8 is not limited to three.

  As the locking means, as shown in FIG. 2, one end of the locking lever 9 is provided on the inner surface side of one end of the opening 3 via a torsion coil spring 10, and the other end of the locking lever 9 is The opposite inner surface side of the other end is pressed by the bias of the torsion coil spring 10. Further, a claw portion 11 is formed at the other end of the locking lever 9, and the claw portion 11 is automatically locked by a bias of the torsion coil spring 10 in a locking hole 12 formed at the other end portion. It has become. As a result, the opening portion 3 of the frame 1 can be opened and fixed when closed. Further, as shown in FIG. 3, the cutter 4 is formed in an abacus ball shape, and the outer peripheral portion 13 is a sharp cutting edge.

  Next, the detailed structure in the present Example of the bamboo cutter of the said structure is demonstrated. In this embodiment, as shown in FIGS. 4 (a), 4 (b) and 4 (c), the cutter 4 is sandwiched between one end of two arms 5 so as to be rotatable around a shaft 4a, and the other end of the arm 5 is a frame. It is configured to be rotatable about a shaft 14 on one side. Further, a block 15 is provided at a substantially central portion in the longitudinal direction of the arm 5, and the block 15 is configured to be pressed via a pressing screw 6 and a nut 16 which are pressing means provided on the frame 1 side. .

  With the configuration described above, the bamboo cutter according to the present embodiment, in use, opens the open portion 3 of the frame 1 through the hinge 2 and positions the bamboo inside the frame 1, and then opens the open ends 3 of the open portion 3. Close the interval. As a result, the claw portion 11 of the locking lever 9 automatically falls into the locking hole 12 and is locked in the opening portion 3, and the annular shape is fixed. In this state, the arm 5 is pushed by the three push screws 6 and the arm 5 is rotated to bring the cutter 4 into strong contact with the bamboo surface. Next, the frame 1 is repeatedly rotated around the bamboo while manually turning the handle mounting cylinder 8 provided at three locations on the outer periphery of the frame 1 and alternately replacing the handles 7. As a result, the cutter 4 gradually cuts into the bamboo surface and can be cut.

  The bamboo cutter having this configuration is a method in which the frame 1 is rotated and cut while pressing the cutter 4 on the circumference of the bamboo, so that no cutting occurs at the cut end. This makes the stump safe. Moreover, since the bamboo cutter can be operated with the other hand while holding the bamboo with one hand, it can be cut safely and in a short time even by women and children. Further, there is an effect that there is no need to replace the blade or perform the most polishing like a nata or a saw.

  FIG. 5 (a) is a top view in which a part of the extrusion mechanism of the cutter is shown in cross section, and FIG. 5 (b) is a side view of the extrusion mechanism in which the same part is shown in cross section.

  In this embodiment, instead of the configuration in which the rotation shaft 14 for rotating the arm 5 in the first embodiment is provided at the end of the arm 5, the rotation shaft 22 for rotating the arm 21 as shown in FIG. 21 is located approximately at the center in the longitudinal direction. Therefore, the push screw 6 is screwed onto the pivotable shaft 23 at the end of the arm 21, and the arm 21 is pivoted about the rotation shaft 22 by moving the end of the arm 21 up and down with the push screw 6. And the cutter 4 can be pushed out to the inside of the frame 1.

  This embodiment can achieve the same effects as those of the first embodiment with the above configuration.

1 frame
2 Hinge
3 Open part
4 Cutter
5,21 arm
6 Push screw
7 Handwheel
8 Installation cylinder
9 Locking lever
10 Torsion coil spring
11 Claw
12 Locking hole
13 Outer part
14,22,23 axes
15 blocks
16 nuts

Claims (4)

  An annular frame that can be opened and closed, circular cutters provided at a plurality of locations on the circumference of the frame, an arm that rotatably holds the cutter, and the arm that rotates about the rotation axis, There are pressing means for pushing the cutter to the inner peripheral side of the frame, and rotating means provided at a plurality of locations on the circumference for rotating the frame in the circumferential direction by a handle. Position the bamboo and press the arm with the pressing means to bring the cutter into strong contact with the outer periphery of the bamboo, rotate the frame with the rotating means, and bite the cutter into the outer periphery of the bamboo. Bamboo cutter characterized by cutting.   The frame is provided with a hinge at one place on the circumference, the other place on the circumference is opened so as to be able to contact and separate via the hinge, and a locking means is provided between the opened open ends. The bamboo cutter according to claim 1, wherein the bamboo cutter is provided and fixed in an annular shape by the locking means when closed.   The rotating means is provided with mounting cylinders detachably attached to a plurality of locations on the circumference of the frame, and the frame is rotated by the handles while alternately mounting the handles on the mounting cylinder. The bamboo cutter according to claim 1.   The bamboo cutter according to claim 1, wherein the cutter has an abacus circle shape and has a sharp cutting edge on an outer periphery.

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