JP2015029516A - Ceramic cutting tool - Google Patents
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本発明は、セラミック製包丁、セラミック製ナイフ等のセラミック製刃物に関する。 The present invention relates to a ceramic blade such as a ceramic knife or a ceramic knife.
従来、包丁は、その機能性、包丁全体のデザインなどの観点から種々の形状の柄体が用いられている（例えば、非特許文献１〜３参照）。 Conventionally, various shapes of knives have been used from the viewpoint of functionality, design of the entire knife, and the like (for example, see Non-Patent Documents 1 to 3).
しかしながら、非特許文献１および非特許文献２の場合、側面視において柄体の凹凸が少なく、例えば、手の小さい女性、あるいは幼児にとって扱いにくい場合がある。例えば、非特許文献１の場合、食材から包丁を抜くとき、柄体から手が滑って抜けてしまうことがあった。また、非特許文献２の場合、食材に包丁を刺す際に、柄体から刃体側へ手が滑ってしまうことがあった。また、非特許文献３に示す包丁は、柄体の刃先側にそれぞれの指が掛かる窪みがあるものの、手の大きさ次第では却って握りづらくなることがあった。 However, in the case of Non-Patent Document 1 and Non-Patent Document 2, there are few irregularities of the handle in a side view, and it may be difficult for a woman with small hands or an infant to handle. For example, in the case of Non-Patent Document 1, when removing a knife from a food material, the hand may slip out of the handle. In the case of Non-Patent Document 2, when a knife is stabbed into a food, the hand may slip from the handle to the blade side. In addition, the knife shown in Non-Patent Document 3 has a dent where each finger hangs on the cutting edge side of the handle, but it may be difficult to grip depending on the size of the hand.
特にセラミック製包丁の場合は、金属製包丁に比べて、落とした場合等において刃先が欠けやすく、またかぼちゃなどの硬く、大きな食材を切ろうとした場合、より大きな力を必要とするなどの柄体の機能性を高める必要がある。 Especially in the case of ceramic knives, compared to metal knives, the cutting edge is more likely to be chipped when dropped, etc. Also, when trying to cut hard and large ingredients such as pumpkins, it requires more force. It is necessary to increase the functionality of
本発明は、手の大小にかかわらず、握りやすく、かつ機能性に優れた柄体を有するセラミック製包丁を提供することを目的とする。 An object of the present invention is to provide a ceramic knife having a handle that is easy to grasp and has excellent functionality regardless of the size of the hand.
本発明の一形態におけるセラミック製刃物は、刃体と、この刃体に取り付けられた第１端部および前記刃体と反対側に位置する第２端部を有し、前記第１端部から前記第２端部に向かう第１方向に沿って延びる柄体とを備えている。この柄体は、前記第１端部から前記第２端部に向かって第１柄部、第２柄部、および第３柄部および第４柄部の順で連続する部位を有している。前記第１方向に直交するとともに前記刃体の刃先を通る第２方向における前記第１〜４柄部の平均の幅をそれぞれＡ、Ｂ、Ｃ、Ｄとしたとき、Ａ＞Ｃ＞Ｂ＞Ｄの関係となり、前記柄体を側面視したときに、前記第２方向における前記第４柄部の幅が、前記第２端部に向かって直線状に傾斜して小さくなるように形成されている。 A ceramic blade according to one aspect of the present invention has a blade, a first end attached to the blade, and a second end located on the opposite side of the blade, from the first end. And a handle extending along a first direction toward the second end. The handle has a first pattern portion, a second handle portion, and a third pattern portion and a fourth handle portion that are continuous in this order from the first end portion toward the second end portion. . When the average widths of the first to fourth handle portions in the second direction passing through the cutting edge of the blade body and orthogonal to the first direction are A, B, C, and D, respectively, A> C> B> D The width of the fourth handle portion in the second direction is formed so as to become linearly inclined toward the second end portion when the handle body is viewed from the side. .
本発明のセラミック製刃物によれば、第１柄部と第３柄部との間に、これらの第１柄部および第３柄部に比べて第２方向における平均幅が小さい第２柄部を有している。そのため、手の大きさに依らず握りやすく、柄体を確実に握ることができ、かつ硬く大きな食材を切る場合において手が柄体から抜けることを低減することが可能である。さらに、第３柄部から第２端部側において、第１柄部〜第３柄部の平均の幅よりも小さい第４柄部を有しているため、手が小さい場合においても、握りやすく、かつ力が入りやすい。 According to the ceramic blade of the present invention, the second handle part having a smaller average width in the second direction than the first handle part and the third handle part between the first handle part and the third handle part. have. Therefore, it is easy to grip regardless of the size of the hand, the handle can be securely gripped, and it is possible to reduce the removal of the hand from the handle when cutting a hard and large food. Furthermore, since it has the 4th handle part smaller than the average width of the 1st handle part to the 3rd handle part on the second end side from the 3rd handle part, it is easy to grip even when the hand is small. And power is easy to enter.
以下、本発明の一実施形態にかかるセラミック製刃物を、図面を参照しつつ詳細に説明する。なお、図面において、セラミック製刃物の長手方向を第１方向（Ｘ方向）とし、第１方向に垂直な方向であり、セラミック製刃物の短手方向に相当する方向を第２方向（Ｙ方向）とし、そして第１方向および第２方向に垂直な方向を第３方向（Ｚ方向）とする。また、図８〜図１４は、本実施形態の形状をより明確にするために６面図および斜視図を示している。 Hereinafter, a ceramic blade according to an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the longitudinal direction of the ceramic blade is the first direction (X direction), the direction is perpendicular to the first direction, and the direction corresponding to the short direction of the ceramic blade is the second direction (Y direction). A direction perpendicular to the first direction and the second direction is defined as a third direction (Z direction). Moreover, FIGS. 8-14 has shown the 6th face figure and the perspective view, in order to clarify the shape of this embodiment more.
＜セラミック製刃物＞
図１〜３に示すセラミック製刃物１は、刃体２と、刃体２に取り付けられた柄体３を有する。なお、セラミック製刃物１とは、刃体２がセラミック製である刃物であることを意味し、柄体３の材質は特に制限されない。
<Ceramic blade>
A ceramic blade 1 shown in FIGS. 1 to 3 includes a blade body 2 and a handle 3 attached to the blade body 2. In addition, the ceramic blade 1 means that the blade body 2 is a blade made of ceramic, and the material of the handle 3 is not particularly limited.
セラミック製刃物１は主に包丁として用いられる。このセラミック製包丁の大きさは特に制限されない。例えば、全長が８ｃｍ〜４０ｃｍ程度のものまで種々提供される。包丁の種類としては、三徳包丁、ナイフの種類としては、ペティナイフ、フルーツナイフなど種々用いることが可能である。 The ceramic blade 1 is mainly used as a knife. The size of the ceramic knife is not particularly limited. For example, various lengths of about 8 cm to 40 cm are provided. Various types of knives can be used, such as Santoku knives and knife types such as Petty knives and fruit knives.
刃体２は、例えば、ジルコニア焼結体からなり、図４に示すように先端部に切刃稜線を有する刃部２１と、後端部に柄体３に覆われる中子２２とを有している。刃体２の大きさおよび厚みは用いるセラミック製刃物の用途に応じて適宜設定すればよい。刃体２の最も広い部分の幅（身幅）は、３０ｍｍ〜５０ｍｍ程度であり、刃体２の厚みは、最も厚みのある部分で１．３ｍｍ〜２．５ｍｍ程度である。 The blade body 2 is made of, for example, a zirconia sintered body, and has a blade portion 21 having a cutting edge ridge line at the front end portion and a core 22 covered with the handle 3 at the rear end portion as shown in FIG. ing. What is necessary is just to set the magnitude | size and thickness of the blade body 2 suitably according to the use of the ceramic blade to be used. The width (width) of the widest part of the blade body 2 is about 30 mm to 50 mm, and the thickness of the blade body 2 is about 1.3 mm to 2.5 mm at the thickest part.
刃体２は、さらに、切刃稜辺と、切刃稜辺に連続した２つの側面部と、２つの側面部に接続した上面部とを有している。具体的には、刃部２１は、側面部を研磨して刃付けされ、切刃稜線を形成する。したがって、刃体２は、図示しないが、断面視において略三角形状（いわゆるハマグリ形状、本刃付け形状、または片刃形状）あるいは略五角形状（いわゆる段付形状）となる。他方、中子２２は、切刃稜線の代わりに下面部を形成するため、断面視において略四角形状となる。 The blade body 2 further includes a cutting edge ridge, two side faces continuous to the cutting edge ridge, and an upper face connected to the two side faces. Specifically, the blade portion 21 is bladed by polishing the side surface portion to form a cutting edge ridge line. Therefore, although not shown, the blade body 2 has a substantially triangular shape (so-called clam shape, main blade shape, or single-edged shape) or a substantially pentagonal shape (so-called stepped shape) in a sectional view. On the other hand, since the core 22 forms a lower surface portion instead of the cutting edge ridgeline, the core 22 has a substantially quadrangular shape in a sectional view.
刃部２１は、刃体２において柄体３に覆われていない部分のことをいう。刃部２の大き
さは、用途に応じて適宜設定される。例えば、刃渡り（切刃稜辺のついている部分の長さ）は、例えば、５ｃｍ〜２０ｃｍ程度である。刃部２１の長さ（刃渡り）は、刃部の平均幅に比べて３倍〜６倍程度であることが好ましい。
The blade portion 21 refers to a portion of the blade body 2 that is not covered with the handle 3. The magnitude | size of the blade part 2 is suitably set according to a use. For example, the blade span (the length of the portion with the edge of the cutting edge) is, for example, about 5 cm to 20 cm. The length (blade span) of the blade portion 21 is preferably about 3 to 6 times the average width of the blade portion.
中子２２は、刃体２において柄体３に覆われている部分のことをいい、側面視において刃体２と柄体３とが重なっている部分である。中子２２の大きさは特に制限されないが、柄体３と重なっている部分が大きい程、抜けにくい点で好ましい。例えば、中子２２の全長が柄体３の全長の１／３倍以上、好ましくは２／３倍以上、より好ましくは３.／４倍
以上の大きさを有している。本実施形態においては、中子２２は、図４（太線）に示すように柄体３の略全長に渡って形成されている。
The core 22 refers to a portion of the blade body 2 that is covered with the handle body 3, and is a portion where the blade body 2 and the handle body 3 overlap in a side view. The size of the core 22 is not particularly limited, but the larger the portion overlapping the handle 3 is, the more preferable it is because it is difficult to come out. For example, the total length of the core 22 is not less than 1/3 times, preferably not less than 2/3 times, more preferably not less than 3./4 times the entire length of the handle 3. In the present embodiment, the core 22 is formed over substantially the entire length of the handle 3 as shown in FIG. 4 (thick line).
中子２２の幅は特に制限されない。本実施形態においては、第１端部３ａから第２端部３ｂに向かうにしたがって幅が小さくなるように設けられている。 The width of the core 22 is not particularly limited. In this embodiment, it is provided so that a width | variety may become small as it goes to the 2nd end part 3b from the 1st end part 3a.
中子２２は、図示しないが、例えば、側面視において、下面部２６および上面部２５側の少なくとも一方に切欠部を有していてもよい。このような切欠部を有することによって、刃体２が柄体３から抜け難くなる。切欠部は複数有していてもよい。特に、下面部２６側および上面部２５側にそれぞれ切欠部を有することが刃体２が柄体３から抜け難くなる点でより好ましい。 Although not shown, the core 22 may have a notch portion on at least one of the lower surface portion 26 and the upper surface portion 25 side in a side view, for example. By having such a notch, it becomes difficult for the blade 2 to come out of the handle 3. A plurality of notches may be provided. In particular, it is more preferable that the lower surface portion 26 side and the upper surface portion 25 side have cutout portions in that the blade body 2 is difficult to be removed from the handle body 3.
柄体３は、刃体２側に取り付けられた第１端部３ａおよび刃体２と反対側に位置する第２端部３ｂを有し、第１端部３ａから第２端部３ｂに向かう第１方向に沿って延びている。柄体３は、セラミック製刃物１の把持部分である。 The handle 3 has a first end 3a attached to the blade body 2 side and a second end 3b located on the opposite side of the blade body 2, and is directed from the first end 3a to the second end 3b. It extends along the first direction. The handle 3 is a grip portion of the ceramic blade 1.
柄体３の材質としては、木材、樹脂材料などが用いられる。樹脂材料としては、例えば、ポリエチレン、ポリプロピレン、ポリエステルなどの合成樹脂、エラストマ樹脂、あるいは合成ゴムを適当な硬さに加硫したものなどが挙げられる。樹脂中に必要に応じて抗菌剤を添加してもよい。柄体３が樹脂の場合、曲げ弾性係数が４００〜４０００ｋｇ／ｃｍ２、圧縮弾性係数が５２０〜３３００ｋｇ／ｃｍ２程度のものを用いることが好ましい。柄体３として樹脂材料を用いる場合は、抗菌剤、顔料などを適宜用いてもよい。 As the material of the handle 3, wood, resin material or the like is used. Examples of the resin material include synthetic resins such as polyethylene, polypropylene, and polyester, elastomer resins, or synthetic rubber vulcanized to an appropriate hardness. An antibacterial agent may be added to the resin as necessary. When the handle 3 is a resin, it is preferable to use one having a flexural modulus of 400 to 4000 kg / cm 2 and a compressive modulus of about 520 to 3300 kg / cm 2 . When a resin material is used as the handle 3, an antibacterial agent, a pigment, or the like may be used as appropriate.
柄体３は、側面視において、第１端部３ａから第２端部３ｂに向かって第１柄部３１、第２柄部３２、第３柄部３３および第４柄部３４の順で連続する部位を有しており、第１柄部３１、第２柄部３２、第３柄部３３および第４柄部３４は、第１方向（Ｘ方向）に直交するとともに第２方向（Ｙ方向）における第１柄部３１、第２柄部３２、第３柄部３３、第４柄部３４の平均の幅をそれぞれＡ、Ｂ、Ｃ、Ｄとしたとき、Ａ＞Ｃ＞Ｂ＞Ｄの関係となる。 The pattern body 3 is continuous in the order of the first handle 31, the second handle 32, the third handle 33, and the fourth handle 34 from the first end 3 a toward the second end 3 b in a side view. The first handle 31, the second handle 32, the third handle 33, and the fourth handle 34 are orthogonal to the first direction (X direction) and in the second direction (Y direction). ) Where the average widths of the first pattern part 31, the second pattern part 32, the third pattern part 33, and the fourth pattern part 34 are A, B, C, and D, respectively, A> C> B> D It becomes a relationship.
具体的には、４０ｍｍ＞Ａ＞２０ｍｍ、３０ｍｍ＞Ｃ＞２０ｍｍ、２０ｍｍ＞Ｂ＞１０ｍｍ、１０ｍｍ＞Ｄの範囲が好ましい。 Specifically, the ranges of 40 mm> A> 20 mm, 30 mm> C> 20 mm, 20 mm> B> 10 mm, 10 mm> D are preferable.
本明細書において、第１柄部３１〜第４柄部３４は、以下のように区別すればよい。なお、第１柄部３１〜第４柄部３４の平均幅の測定は、例えば、各柄部に任意の５箇所をノギスを使用して測定し、その平均値を算出することによって行なわれる。 In the present specification, the first handle portion 31 to the fourth handle portion 34 may be distinguished as follows. In addition, the measurement of the average width | variety of the 1st handle | pattern part 31-the 4th handle | pattern part 34 is performed by measuring arbitrary 5 places in each handle | pattern part using a caliper, and calculating the average value, for example.
本実施形態においては、例えば、柄体３は、側面視において第２方向側に少なくとも２つの凸部を有しており、最も刃体２側に位置する第１凸部３１ｐは第１柄部３１に位置しており、第１凸部３１ｐに隣り合う第２凸部３３ｐは第３柄部３３に位置しており、第１凸部３１ｐと第２凸部３３ｐとの間に位置する凹部３２ｐは第２柄部３２に位置している。 In the present embodiment, for example, the handle 3 has at least two protrusions on the second direction side in a side view, and the first protrusion 31p located closest to the blade body 2 is the first handle portion. The second convex portion 33p located at 31 and adjacent to the first convex portion 31p is located at the third handle portion 33, and is a concave portion located between the first convex portion 31p and the second convex portion 33p. 32 p is located in the second handle portion 32.
さらに、第１柄部３１と第２柄部３２との境界は、具体的には、切刃稜線側における柄体３の稜線において、第１凸部３１ｐの最大幅を有する部分（第１頂部）と凹部３２ｐの最小幅を有する部分（底部）との中間地点（第１中間地点）を始点とし、第２方向に引いた線を基準とすればよい。 Furthermore, the boundary between the first handle portion 31 and the second handle portion 32 is specifically a portion (first top portion) having the maximum width of the first convex portion 31p in the ridge line of the handle body 3 on the cutting edge ridge line side. ) And the portion having the minimum width of the recess 32p (bottom) (first intermediate point) as a starting point, and a line drawn in the second direction may be used as a reference.
また、第２柄部３２と第３柄部３３との境界は、上記柄体３の稜線において、凹部３２ｐの最小幅を有する部分（底部）と第２凸部３３ｐの最大幅を有する部分（第２頂部）との中間地点（第２中間地点）を始点とし、第２方向に引いた線を基準とすればよい。 Further, the boundary between the second handle portion 32 and the third handle portion 33 is a portion (bottom portion) having the minimum width of the concave portion 32p and a portion having the maximum width of the second convex portion 33p in the ridge line of the pattern body 3 ( What is necessary is just to make the reference | standard the line drawn in the 2nd direction from the intermediate point (2nd intermediate | middle point) with a 2nd top part.
第３柄部３３と第４柄部３４との境界は、例えば、第２中間地点から第１方向に平行に引いた線と柄体３の稜線との交点を始点とし、第２方向に引いた線を基準とすればよい。 The boundary between the third handle portion 33 and the fourth handle portion 34 is, for example, drawn in the second direction starting from the intersection of the line drawn in parallel with the first direction from the second intermediate point and the ridgeline of the handle 3 The reference line should be used as a reference.
さらに第４柄部３４の幅Ｄは、第２端部３ｂに向かって直線状に傾斜して小さくなるように形成されており、先細の形状となっていてもよい。これにより、例えば、大人と子供、男性と女性等、手の大きさによって、柄体３の握り易い位置を自由に選択することができる。 Further, the width D of the fourth handle portion 34 is formed so as to be linearly inclined toward the second end portion 3b, and may be tapered. Thereby, for example, an adult and a child, a man and a woman, etc. can freely select a position where the handle 3 is easy to grip depending on the size of the hand.
例えば図５のように、大人の場合は、第１柄部３１を親指と人さし指、第２柄部３２内の範囲を中指、薬指、小指で握ることになるので、小指が凹部３２ｐに引っ掛かり易くなり、また例えば、図６のように、子供の場合は、第２凸部３３ｐを親指と人さし指、第４柄部の範囲を中指、薬指、小指で握ることになるので、人さし指が凹部３２ｐに引っ掛かり易くなる。これによって、セラミック製刃物１を食材に対して抜き差しするときに、手がセラミック製刃物１から抜けることを低減できる。 For example, as shown in FIG. 5, in the case of an adult, the first handle 31 is gripped by the thumb and index finger, and the range within the second handle 32 is held by the middle finger, ring finger, and little finger, so the little finger is easily caught in the recess 32p. For example, as shown in FIG. 6, in the case of a child, the second convex portion 33p is grasped with the thumb and forefinger, and the range of the fourth handle portion is grasped with the middle finger, the ring finger, and the little finger. It becomes easy to get caught. Thereby, when the ceramic blade 1 is inserted into and removed from the food, it is possible to reduce the hand from coming out of the ceramic blade 1.
第１柄部３１および第２柄部３２は、刃体２の刃先（切刃稜辺）と同じ側に突出していることが好ましい。第１柄部３１および第２柄部３２は、刃体２の刃先（切刃稜辺）と同じ側に突出していることで、それぞれの指が柄体３にフィットし易くなる。本実施形態においては、第１柄部３１の突出部（第１凸部３１ｐ）が第３柄部３３の突出部（第２凸部３３ｐ）に比べて大きく突出している。 It is preferable that the first handle portion 31 and the second handle portion 32 protrude on the same side as the cutting edge (cutting edge ridge side) of the blade body 2. The first handle portion 31 and the second handle portion 32 protrude on the same side as the cutting edge (cutting edge ridge side) of the blade body 2 so that each finger can easily fit the handle body 3. In the present embodiment, the protruding portion (first protruding portion 31p) of the first handle portion 31 protrudes larger than the protruding portion (second protruding portion 33p) of the third handle portion 33.
本実施形態においては、第３方向における第３柄部３３の幅が、第３方向における第２柄部３２の幅よりも小さいことが好ましい。これにより、子供が第２凸部３３ｐを握る場合、柄体３が手の平全体にフィットし易くなる。 In the present embodiment, it is preferable that the width of the third handle portion 33 in the third direction is smaller than the width of the second handle portion 32 in the third direction. Thereby, when a child grasps the 2nd convex part 33p, it becomes easy to fit handle 3 to the whole palm.
さらに本発明のセラミック製刃物の実施形態は、第３方向における第１柄部３１の幅が、第３方向における第２柄部３２の幅よりも小さいことが好ましい。これにより、大人が第１凸部３１ｐを握る場合、柄体３が手の平全体にフィットし易くなる。 Furthermore, in the embodiment of the ceramic blade of the present invention, it is preferable that the width of the first handle portion 31 in the third direction is smaller than the width of the second handle portion 32 in the third direction. Thereby, when an adult holds the 1st convex part 31p, it becomes easy to fit the handle 3 to the whole palm.
さらに柄体３は、図７に示すように、第２端部３ｂ側からみた場合に、刃体２の背面側に位置する第１曲面部３５、刃体２の刃先側に位置する第２曲面部３６、および第１曲面部３５と第２曲面部３６との端部同士をつなぐ少なくとも２つの平面部３７とを有している。このように、２つの曲面部３５，３６間に平面部３７を設けることによって握りやすくなり、食材を切断する場合にも手にフィットする。握りやすさの観点から、第１曲面部３５と第２曲面部３６との一方端部同士を複数の平面部３７でつないでおいてもよい。 Furthermore, as shown in FIG. 7, the handle body 3, when viewed from the second end 3 b side, is a first curved surface portion 35 located on the back side of the blade body 2, and a second surface located on the blade edge side of the blade body 2. It has a curved surface portion 36 and at least two flat surface portions 37 that connect ends of the first curved surface portion 35 and the second curved surface portion 36. Thus, it becomes easy to hold | grip by providing the plane part 37 between the two curved surface parts 35 and 36, and also fits a hand also when cutting a foodstuff. From the viewpoint of ease of gripping, one end portions of the first curved surface portion 35 and the second curved surface portion 36 may be connected by a plurality of flat surface portions 37.
第１曲面部３５および第２曲面部３６は、手にフィットしやすい点で設けられており、これらの大きさに特に制限はない。第１曲面部３５および第２曲面部３６の曲率半径は同じであっても、異なっていてもよい。本実施形態において、第１曲面部３５の曲率半径が第２曲面部３６の曲率半径に比べて大きい。これによって、さらに手の平に柄部３がフィ
ットし易くなる。なお、曲率半径は、例えば、図３で示すように正面で見た場合に、頂点（紙面の最も上部）を基準として第１曲面部３５の曲率半径を測定し、底部（紙面の最も下部）を基準として第２曲面部３６の曲率半径を測定すればよい。好ましい曲率半径としては、第１曲面部３５が１５〜２０ｍｍ、第２曲面部３６が１０〜１５ｍｍであるのが適当である。
The 1st curved surface part 35 and the 2nd curved surface part 36 are provided by the point which is easy to fit a hand, and there is no restriction | limiting in particular in these magnitude | sizes. The curvature radius of the 1st curved surface part 35 and the 2nd curved surface part 36 may be the same, or may differ. In the present embodiment, the radius of curvature of the first curved surface portion 35 is larger than the radius of curvature of the second curved surface portion 36. This makes it easier to fit the handle 3 to the palm. Note that the radius of curvature is, for example, when measured in front as shown in FIG. 3, the radius of curvature of the first curved surface portion 35 is measured with reference to the apex (uppermost portion of the paper), and the bottom (lowermost portion of the paper). The radius of curvature of the second curved surface portion 36 may be measured with reference to. As a preferable radius of curvature, it is appropriate that the first curved surface portion 35 is 15 to 20 mm and the second curved surface portion 36 is 10 to 15 mm.
平面部３７は、２つの平面部間の距離が背面から刃先に向かうにつれて小さくなっていることが好ましい。これによって、指の関節間における指の腹を平面部３７に密着させることができ、安定して持つことができる。 It is preferable that the plane part 37 becomes small as the distance between two plane parts goes to a blade edge from a back surface. Thereby, the belly of the finger between the finger joints can be brought into close contact with the flat portion 37 and can be held stably.
平面部３７の大きさは特に制限されない。手の密着性の観点から、持ちやすい部分に必要に応じて設ければよい。本実施形態においては、例えば、さらに柄体の第１方向に渡って設けられていることが好ましい。このように、平面部３７が第１方向に渡って設けられていることによって、柄体３のどの部分をもっても手にフィットし、安定して持つことができる。 The size of the flat portion 37 is not particularly limited. What is necessary is just to provide in the part which is easy to hold from a viewpoint of adhesiveness of a hand as needed. In the present embodiment, for example, it is preferable to be provided over the first direction of the handle. Thus, by providing the plane part 37 over the first direction, any part of the handle 3 can be fitted to the hand and can be held stably.
平面部３７の第２方向における最大幅は、さらに第３柄部３３に位置していることが好ましい。平面部３ｇの第２方向における最大幅が第３柄部３３に位置していることで、子供が第２凸部３３ｐを握る場合、平面部３７が手の平全体にフィットし易くなる。 It is preferable that the maximum width of the flat portion 37 in the second direction is further located in the third handle portion 33. Since the maximum width in the second direction of the flat surface portion 3g is located in the third handle portion 33, when the child grasps the second convex portion 33p, the flat surface portion 37 can easily fit the entire palm.
柄体３は、刃体２の後端部に位置する中子２２を覆って設けられている。この柄体３と刃体２とは、具体的には、柄体３の内部において２つの板材が中子２２の一部を挟んで固定されている。このように２つの板材４（太線）で刃体２と柄体３とを固定することによって、刃体２のぐらつきが少なくなるとともに、刃体２の抜け等を抑制することができ、優れた長期信頼性が得られる。また、刃体２と柄体３とを止め具で止める場合に比べて、セラミックの刃体２に貫通孔を空ける必要がないため、欠けにくいという効果を有している。板材４としては、金属材料、例えば、鉄、鋼板（例えば、珪素鋼板、ステンレス鋼）、アルミニウム合金、ニッケル合金（パーマロイ）、アモルファス合金箔などを用いることができる。鉄、珪素鋼板、ステンレス鋼などの磁性材料は、磁気、Ｘ線等に検知可能であるため、セキュリティの観点から用いられる。 The handle 3 is provided to cover the core 22 located at the rear end of the blade 2. Specifically, the handle body 3 and the blade body 2 are fixed to each other with two plate members sandwiching a part of the core 22 inside the handle body 3. By fixing the blade body 2 and the handle body 3 with the two plate members 4 (thick lines) in this way, the wobbling of the blade body 2 can be reduced, and the blade body 2 can be prevented from coming off. Long-term reliability is obtained. Further, as compared with the case where the blade body 2 and the handle body 3 are fastened with a stopper, it is not necessary to make a through hole in the ceramic blade body 2, so that there is an effect that it is difficult to chip. As the plate material 4, a metal material such as iron, a steel plate (for example, a silicon steel plate, stainless steel), an aluminum alloy, a nickel alloy (permalloy), an amorphous alloy foil, or the like can be used. Magnetic materials such as iron, silicon steel, and stainless steel are used from the viewpoint of security because they can be detected by magnetism, X-rays, and the like.
＜セラミック製刃物の製造方法＞
本発明の一実施態様におけるセラミック製刃物の製造方法の具体的な工程を以下に説明する。
<Method for manufacturing ceramic blade>
Specific steps of the method for manufacturing a ceramic blade in one embodiment of the present invention will be described below.
まず、セラミックスからなる刃体２を準備する。例えば、１〜４モル％のイットリア粉末を含むジルコニア粉末に、アクリル系、ワックス系、またはＰＥＧ系バインダーを２〜１０質量％となるように添加し、顆粒状にする。得られた顆粒を、金型を用いて成形圧力１０００〜１５００ｋｇ／ｃｍ２にて成形し、その後、焼成してジルコニア焼結体を得る。得られたジルコニア焼結体を通常の方法で刃付けし、セラミックスからなる刃体２を得る。 First, a blade 2 made of ceramic is prepared. For example, an acrylic, wax-based, or PEG-based binder is added to a zirconia powder containing 1-4 mol% yttria powder so as to be 2 to 10% by mass, and is granulated. The obtained granule is shape | molded with a shaping | molding pressure 1000-1500 kg / cm < 2 > using a metal mold | die, and is baked after that, and a zirconia sintered compact is obtained. The obtained zirconia sintered body is bladed by a normal method to obtain a blade body 2 made of ceramics.
上記成形方法は、金型による成形方法以外にも、当業者が通常行なう方法によって成形することができる。例えば、鋳込み成形、可塑成形法（インジェクション法）、ラバープレス法、ホットプレス法など適宜用いることができる。 In addition to the molding method using a mold, the molding method can be molded by a method that is usually performed by those skilled in the art. For example, cast molding, plastic molding (injection), rubber press, hot press, etc. can be used as appropriate.
焼成温度は材料に応じて適宜設定すればよい。ジルコニアの場合、１３００〜１５００℃で行なわれる。焼成後、得られたジルコニア焼結体に対して、必要に応じて、圧力１５００〜２５００ｋｇ／ｃｍ２で２〜５時間保持するＨＩＰ処理を行なってもよい。 What is necessary is just to set a calcination temperature suitably according to material. In the case of zirconia, it is performed at 1300 to 1500 ° C. After calcination, the obtained zirconia sintered body may be subjected to HIP treatment for 2 to 5 hours at a pressure of 1500 to 2500 kg / cm 2 as necessary.
次いで、セラミックスからなる刃体２の後端部に位置する中子２２に対して、必要に応じて中子２２を挟むように２枚の板材４を固定する。板材４の固定は、上述のように接着材を用いて確実に固定してもよいし、ねじなどを用いて固定してもよい。テープなどの仮止め程度であってもよい。あるいは包丁の機能を損なわない範囲でクリップなどの補助具を用いて一時的に固定してもよい。 Next, the two plate members 4 are fixed to the core 22 positioned at the rear end portion of the ceramic blade body 2 so as to sandwich the core 22 as necessary. The plate member 4 may be fixed using an adhesive as described above, or may be fixed using a screw or the like. It may be a temporary fixing degree such as a tape. Or you may fix temporarily using auxiliary tools, such as a clip, in the range which does not impair the function of a kitchen knife.
さらに、板材４が固定された中子２２を覆うように柄体３を形成する。本実施形態においては、樹脂製の柄体３を用いる。なお、木材性の柄体３を用いる場合は、予め板材４が固定された中子２２を挿入できる挿入部を設けておくことが必要である。 Furthermore, the handle 3 is formed so as to cover the core 22 to which the plate material 4 is fixed. In the present embodiment, a resin handle 3 is used. In addition, when using the wood pattern body 3, it is necessary to provide the insertion part which can insert the core 22 to which the board | plate material 4 was fixed previously.
本実施形態のように、樹脂性の柄体３を用いる場合は、具体的には、柄体３の形状のキャビティを有する金型を準備しこのキャビティ内に上記板材４が固定された中子２２を配置する。その後、このキャビティ−内に加熱した樹脂を注入する。樹脂の加熱温度は用いる樹脂に応じて設定すればよい。例えば、ポリプロピレン樹脂を用いる場合、１６０〜２４０℃に設定すればよい。 When the resinous handle 3 is used as in the present embodiment, specifically, a core having a cavity having the shape of the handle 3 is prepared, and the above-described plate member 4 is fixed in the cavity. 22 is arranged. Thereafter, heated resin is injected into the cavity. What is necessary is just to set the heating temperature of resin according to resin to be used. For example, when polypropylene resin is used, the temperature may be set to 160 to 240 ° C.
さらに、注入した樹脂を冷却する。冷却条件は、柄体の成形において、大きな空隙（巣）が多数できないような条件であればよい。 Further, the injected resin is cooled. The cooling condition may be a condition that does not allow a large number of large voids (nests) in forming the handle.
１：セラミック製刃物
２：刃体
２１：刃部
２２：中子
２５：上面部
２６：下面部
３：柄体
３ａ：第１端部
３ｂ：第２端部
３１：第１柄部
３１ｐ：第１凸部
３２：第２柄部
３２ｐ：凹部
３３：第３柄部
３３ｐ：第２凸部
３４：第４柄部
３５：第１曲面部
３６：第２曲面部
３７：平面部
４：板材
Ａ：第２方向における第１柄部の幅
Ｂ：第２方向における第２柄部の幅
Ｃ：第２方向における第３柄部の幅
Ｄ：第２方向における第４柄部の幅
1: Ceramic blade 2: Blade 21: Blade 22: Core 25: Upper surface 26: Lower surface 3: Pattern body 3a: First end 3b: Second end 31: First pattern 31p: First 1 convex portion 32: second pattern portion 32p: concave portion 33: third pattern portion 33p: second convex portion 34: fourth pattern portion 35: first curved surface portion 36: second curved surface portion 37: flat surface portion 4: plate material A : Width B of the first handle in the second direction B: Width of the second handle in the second direction C: Width of the third handle in the second direction D: Width of the fourth handle in the second direction
Claims (7)
該刃体に取り付けられた第１端部および前記刃体と反対側に位置する第２端部を有し、前記第１端部から前記第２端部に向かう第１方向に沿って延びる柄体とを備え、
該柄体は、前記第１端部から前記第２端部に向かって第１柄部、第２柄部、および第３柄部および第４柄部の順で連続する部位を有しており、
前記第１方向に直交するとともに前記刃体の刃先を通る第２方向における前記第１〜４柄部の平均の幅をそれぞれＡ、Ｂ、Ｃ、Ｄとしたとき、Ａ＞Ｃ＞Ｂ＞Ｄの関係となり、
前記柄体を側面視したときに、前記第２方向における前記第４柄部の幅が、前記第２端部に向かって直線状に傾斜して小さくなるように形成されている、セラミック製刃物。 A blade,
A handle having a first end attached to the blade and a second end located on the opposite side of the blade, and extending along a first direction from the first end toward the second end. With body,
The handle has a first handle portion, a second handle portion, and a third handle portion and a fourth handle portion that are continuous in this order from the first end portion toward the second end portion. ,
When the average widths of the first to fourth handle portions in the second direction passing through the cutting edge of the blade body and orthogonal to the first direction are A, B, C, and D, respectively, A>C>B> D Relationship,
A ceramic blade that is formed so that the width of the fourth handle portion in the second direction becomes smaller in a linearly inclined manner toward the second end portion when the handle body is viewed from the side. .
前記２つの平面部間の距離は前記背面から前記刃先に向かうにつれて小さくなっている、請求項１に記載のセラミック製刃物。 When viewed from the second end side, the handle body has a first curved surface portion located on the back surface side of the blade body, a second curved surface portion located on the blade edge side of the blade body, and a first curved surface portion and a first curved surface portion. Having two flat surfaces connecting the ends of the two curved surfaces,
2. The ceramic blade according to claim 1, wherein a distance between the two plane portions decreases from the back surface toward the blade edge.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4321159Y1 (en) * | 1966-02-08 | 1968-09-05 | ||
| JPS4910857U (en) * | 1972-04-28 | 1974-01-29 | ||
| JP3171162B2 (en) * | 1998-04-02 | 2001-05-28 | 日本電気株式会社 | PLL circuit |
| JP2010064170A (en) * | 2008-09-09 | 2010-03-25 | Kai R & D Center Co Ltd | Handle structure of manual sharp-edged tool |
| JP2012148160A (en) * | 2005-03-03 | 2012-08-09 | Kyocera Corp | Ceramic edged tool |
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2013
- 2013-07-31 JP JP2013158530A patent/JP6117644B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4321159Y1 (en) * | 1966-02-08 | 1968-09-05 | ||
| JPS4910857U (en) * | 1972-04-28 | 1974-01-29 | ||
| JP3171162B2 (en) * | 1998-04-02 | 2001-05-28 | 日本電気株式会社 | PLL circuit |
| JP2012148160A (en) * | 2005-03-03 | 2012-08-09 | Kyocera Corp | Ceramic edged tool |
| JP2010064170A (en) * | 2008-09-09 | 2010-03-25 | Kai R & D Center Co Ltd | Handle structure of manual sharp-edged tool |
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