JP2007030071A - Two-flute cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new type cutter, relaxing an impact in contact, especially having an excellent performance as a hand-held type cutter by preventing a rotary blade from biting into a material to be cut while having the same cutting performance as the conventional cutter. <P>SOLUTION: This two-flute cutter includes: two rotary mechanisms fitted to both end parts of a body; two rotary blades fitted to the tips of the rotary mechanisms, respectively, and a holding mechanism holding the positions of the two rotary blades, wherein the two rotary blades are rotated in the reverse directions with a very small clearance gap therebetween. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a two-blade cutter, and more specifically, by cutting while the two blades rotate in the opposite direction, the cutting material is prevented from entering the cutting material, and the contact between the cutting material and the rotary blade The present invention relates to a two-blade cutter capable of reducing the impact at the time.

  Conventionally, a cutter using a disk-shaped rotary blade has been used for cutting steel, stone, and the like. This cutter cuts the material by rotating the blade with a rotating mechanism such as a motor. However, the rotating blade is difficult to cut material or receives a strong impact due to its reaction when the rotating blade is brought into contact with the cutting material. There were problems such as. These are particularly serious problems in hand-held cutters.

  Therefore, there is a need for the development of new types of cutters, especially hand-held cutters that have the same cutting performance as conventional cutters, but prevent the rotary blade from getting into the cutting material and reduce the impact during contact. The present invention has as its subject the provision of such a cutter.

  The present inventor first examined the cause of the impact of the rotary blade in the cutting material in the conventional cutter and the impact at the time of contact. As a result, the rotary blade rotates to one side and the force is applied only to one side. I realized that. Then, it has been found that the problem that force is applied only to one of these can be solved by applying a force in the direction to cancel this force, more specifically, by providing a rotary blade that rotates in the opposite direction. completed.

  Accordingly, the present invention provides a cutter having two rotating mechanisms attached to both ends of the main body, two rotating blades attached to the respective tips of the rotating mechanism, and a holding mechanism for holding the positions of the two rotating blades. The cutter is characterized in that the two rotary blades rotate in opposite directions while having a slight gap.

  According to the cutter of the present invention, it is possible to prevent the rotary blade from getting into the cutting material, and it is possible to reduce the impact at the time of contact between the rotary blade and the cutting material.

  Therefore, the cutter of the present invention can be used safely as a hand-held cutter, and can be widely used at construction sites.

  Hereinafter, the present invention will be described in more detail with reference to the drawings showing preferred embodiments of the present invention.

  1 is a plan view of the cutter of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. In the figure, 1 is a cutter, 2 is a main body, 3 is a rotating mechanism, 4 is a rotating blade, 5 is a holding mechanism, 6 is a folding hinge, 7 is an adjusting mechanism, and 8 is a cover.

  The basic configuration of the cutter shown in FIG. 1 is obtained by attaching rotating mechanisms 3 a and 3 b and rotating blades 4 a and 4 b to both ends of the main body 2. The rotary blades 4a and 4b rotate in the opposite direction with a very small gap. The shape of the main body 2 is generally U-shaped in FIG. 1, but is not limited thereto, and for example, two main body portions may be coupled by a coupling member.

  The main body 2 needs to be made of a material that stably holds the rotation mechanism 3 and the rotary blade 4 and is not affected by impact or vibration during operation, and is manufactured from, for example, iron casting, aluminum, or zinc die casting. It is preferable. The main body 2 may be provided with a non-slip portion 9 for holding by hand, for example.

  Moreover, as the rotation mechanism 3, an electric motor etc. are preferable, and it is preferable to equip the front-end | tip part of the axis | shaft of this rotation mechanism 3 with the attachment plate for attaching a rotary blade.

  Furthermore, the gap provided between the rotary blades 4a and 4b is preferably narrow as long as they do not contact. That is, if the gap is too narrow, the rotary blades may come into contact with each other due to some impact, and if it is too far away, an uncut portion will be left in the meantime, which is not preferable. Therefore, it is necessary that there are no protrusions on the surface of each rotary blade facing the other rotary blade. For example, a countersunk screw or the like can be used to attach the rotary blade, as shown in FIG. Thus, the center of the rotary blade 4 is recessed, and it is necessary to stop at that portion with a nut 10 or a bolt (not shown) so as not to contact the surface facing the other rotary blade.

  Furthermore, the rotary blades 4a and 4b are generally made of a material such as a super hard material. However, if the rotary blades 4a and 4b are worn due to use, they need to be replaced. In order to replace the rotary blade, it is preferable that the main body 2 of the present invention is provided with, for example, a folding hinge 6 so as to be bent.

  Furthermore, the cutter of the present invention is preferably provided with a holding mechanism for stably holding the position of the two rotary blades. For example, this holding mechanism 5 uses an oval or capsule-shaped oval hole as a hole through which the bolt-nut passes through the main body 2, and if the bolt-nut mounting position can be slightly changed, An adjusting mechanism that changes the distance between both ends can be used, and the rotary blades 4a and 4b can be set to a desired interval.

  In addition, it is preferable from the surface of ensuring safety | security to provide the cover 8 except the part used for the cutting | disconnection of a rotary blade.

  Next, the reason why the cutter of the present invention can prevent biting into the cutting material of the rotary blade and impact during contact will be described with reference to FIG.

  As shown in the schematic diagram of FIG. 5, the principle of the cutter of the present invention is that the rotating mechanisms 3a and 3b rotate in the opposite directions, and the rotating blades 4a and 4b also rotate in the opposite directions. Then, for example, when the right rotary blade 4a comes into contact with the cutting material A, a counteracting force is generated on the cutter, which becomes an impact force. However, when the left rotary blade 4b also contacts at the same time, the right rotary blade 4a contacts. The reaction force generated by the above is canceled by the force generated by the contact of the left rotary blade 4b, and no impact force is generated as a whole.

  By such a principle, the problem of the cutter using a single blade is solved, and the cutter can be safely used even by hand.

  According to the cutter of the present invention described above, the rotary blade is not inserted into the cutting material or receives an impact force at the time of contact, and the work can be performed with higher efficiency than the conventional cutter.

  In addition, since there is no problem of the biting of the rotary blade and the impact force at the time of contact, there is a possibility of cutting without intentionally fixing the cutting material firmly to the work table. Therefore, it is possible to perform a cutting operation in the longitudinal direction of a wide material that has been difficult to fix to the work table. In addition, even if the cutting material is a three-dimensional object or uneven, it is easy to cut the box-shaped inner surface. Furthermore, the work posture may be not only downward but also standing or upward, and the work start position is not limited to being performed sequentially from the end, and may be performed from the middle. As a result, the work using the cutter of the present invention can be performed even in a relatively narrow work place or the like.

  Thus, the cutter of the present invention has improved workability compared to conventional cutters, and therefore can be widely used for cutting various materials.

It is a top view of this invention cutter. It is a front view of this invention cutter. It is a side view of this invention cutter. It is drawing which shows an example of how to stop a rotary blade. It is drawing which showed typically the motion of the rotary blade of this invention cutter.

Explanation of symbols

1 ... Cutter 2 ... Body 3 ... Rotating mechanism 4 ... Rotating blade 5 ... Holding mechanism 6 ... Bending hinge 7 ... Adjusting mechanism 8 ... Cover 9 ... Non-slip part 10 ... Nut B ... Cutting material

Claims (4)

  A cutter having two rotating mechanisms attached to both ends of the main body, two rotating blades attached to the respective ends of the rotating mechanism, and a holding mechanism for holding the positions of the two rotating blades, A cutter characterized in that two rotary blades rotate in opposite directions with a slight gap.   The cutter according to claim 1, wherein the main body is substantially U-shaped.   The cutter according to claim 1, further comprising an adjustment mechanism between the main body and the holding mechanism. The cutter according to any one of claims 1 to 3, wherein the main body is bendable.

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