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JPH0349713B2 - - Google Patents
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JPH0349713B2 - - Google Patents

Info

Publication number
JPH0349713B2
JPH0349713B2 JP57209572A JP20957282A JPH0349713B2 JP H0349713 B2 JPH0349713 B2 JP H0349713B2 JP 57209572 A JP57209572 A JP 57209572A JP 20957282 A JP20957282 A JP 20957282A JP H0349713 B2 JPH0349713 B2 JP H0349713B2
Authority
JP
Japan
Prior art keywords
ceramic
hammer
head
hammers
chipping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP57209572A
Other languages
Japanese (ja)
Other versions
JPS5997856A (en
Inventor
Nakao Mikami
Takayuki Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP20957282A priority Critical patent/JPS5997856A/en
Publication of JPS5997856A publication Critical patent/JPS5997856A/en
Publication of JPH0349713B2 publication Critical patent/JPH0349713B2/ja
Granted legal-status Critical Current

Links

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  • Percussive Tools And Related Accessories (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明はアルミナ、炭化珪素、窒化珪素、ジル
コニア等のセラミツクで構成したハンマーに関す
る。 従来から用いられている金槌、玄翁など、いわ
ゆるハンマーのうち比較的大きな強度が要求さ
れ、重量の大きなものでは鉄製のものが多用され
ている。かかる鉄製のハンマーは大きな打当強度
のものを安価に提供できるという利点がある反
面、製密機械や電子機械の組立、微調整等を行う
に用いるような比較的小型のハンマーとして鉄製
のものを用いる場合、鉄系金属などに打当した
際、火花を発生する恐れがあり、また磁気的変化
を及ぼすなどの不都合や導電性を有すことによる
電気回路の短絡事故を起こすなどの恐れがあつ
た。一方、被打当面に打傷を付けないようにした
り、火花の発生を招来しないように、被打当面を
構成する物体より軟かい材質である、銅、木材、
合成樹脂、ゴムなどで作られたハンマーもそれぞ
れの特性にあつたものが使用されていた。したが
つて使用する個所あるいは被打当物体に最も適合
した材質で作られたハンマーが従来から用いられ
ているが、上記の如き要件をできるだけ多く兼備
したハンマーは存在しなかつた。 本発明は上記に鑑みて開発した新規なるハンマ
ーを提供せんとするものである。 以下、本発明ハンマーを具体的に説明すれば、
第1図で示すように木材、合成樹脂、金属などで
作られたハンドル1の先端にヘツド2が装着され
ることによつてハンマーは構成されている。この
うち、物体を打当するヘツド2はアルミナ
(Al2O3、炭化珪素(SiC)、窒化珪素(Si3N4)、
ジルコニア(ZrO2)、サイアロン(Sj3Al3O3N5
などのセラミツク体で形成されるが、これらのセ
ラミツク体の物性を挙げれば第1表の通りであ
る。
The present invention relates to a hammer made of ceramic such as alumina, silicon carbide, silicon nitride, and zirconia. Among the so-called hammers that have been used in the past, such as hammers and geno, relatively high strength is required, and iron is often used for heavy items. Such iron hammers have the advantage of being able to provide a large striking force at a low cost, but on the other hand, iron hammers are used as relatively small hammers used for assembling and fine-tuning smelting machinery and electronic machinery. When used, there is a risk of generating sparks when struck against ferrous metals, etc., and there is also the risk of causing inconveniences such as magnetic changes and short circuit accidents due to conductivity. Ta. On the other hand, in order to avoid damaging the surface being struck or causing sparks, materials such as copper, wood, etc.
Hammers made of synthetic resin, rubber, etc. were also used, each with its own characteristics. For this reason, hammers made of materials that are most suitable for the location where they are used or the object to be struck have been used, but there has not been a hammer that meets as many of the above requirements as possible. The present invention aims to provide a new hammer developed in view of the above. The hammer of the present invention will be specifically explained below.
As shown in FIG. 1, the hammer is constructed by attaching a head 2 to the tip of a handle 1 made of wood, synthetic resin, metal, or the like. Of these, the head 2 that hits the object is made of alumina (Al 2 O 3 , silicon carbide (SiC), silicon nitride (Si 3 N 4 ),
Zirconia (ZrO 2 ), Sialon (Sj 3 Al 3 O 3 N 5 )
The physical properties of these ceramic bodies are listed in Table 1.

【表】 この第1表から明らかなように一般にセラミツ
ク体は鋼鉄に比較して硬度は大きいが、抗折強
度、靭性は概して小さい。このうちジルコニアセ
ラミツクは他のセラミツクにくらべ抗折強度が大
きく、特に破壊靭性がきわめて大きいことから、
ハンマーのヘツド2を形成する材質としてはもつ
とも適したものであると言える。 ところで、上記の如き破壊靭性の最も大きなジ
ルコニアセラミツクでもつてしても鋼鉄製のもの
にくらべ欠け、チツピングが若干発生し易いこと
から、第1図X−X線断面におけるコーナー部は
第2図イにて部分断面を示すように面取りが施さ
れ、その斜切角θが鈍角であることが必要で、好
ましくはθが120度以上では欠け、チツピング等
がほとんど発生しないという実験結果が得られ
た。このほか、同図ロにて示す如き丸味をもたせ
ることによつても欠け、チツピング等の発生を大
巾に低減させることができ、この場合、丸みの大
きさとしては、曲率半径(R)1mm以上、好まし
くは曲率半径(R)2mm以上のものが効果的であ
つた。 なお、第1図に示したハンマーではヘツド2全
体をセラミツクで構成した例を示したが、これに
限らず、第3図にてヘツド2のみを示したよう
に、打当面を形成する部分のみにセラミツク部材
2aを配設し、本体部2bは金属、又は合成樹脂
材で構成したものであつてもよく、また同図bの
ごとく、一方にはセラミツク部材2aを、他方に
は被打当物体に適合したヘツド2とするため、
銅、ゴム、木などを用いたヘツド部材2cを組合
せた複合型のヘツドを構成してもよい。 以上のように本発明によれば、少くともヘツド
の打当面を形成する部分をセラミツク材で形成し
たことによつて被打当対象物に対する磁気的、電
気的悪影響を及ぼすことがなく、また化学装置関
係の現場における組立、点検作業等にも火花の発
生、、腐蝕や錆の発生を来たさず、さらに打当面
が高硬度であるため摩擦したり傷つき難いことか
ら、鏡面状に打当面を摩擦してあることによつ
て、例えば金を延展せしめ金箔を製造したり、美
術工芸品の製作に用いた場合には製作加工物の表
面に傷をつける恐れがないなど多くの特長をもつ
たハンマーを提供することができる。
[Table] As is clear from Table 1, ceramic bodies generally have greater hardness than steel, but generally have lower flexural strength and toughness. Among these, zirconia ceramic has a higher flexural strength than other ceramics, and especially has extremely high fracture toughness.
It can be said that this is the most suitable material for forming the head 2 of the hammer. By the way, even with zirconia ceramic, which has the highest fracture toughness as mentioned above, chipping and chipping are slightly more likely to occur than those made of steel. The chamfering is performed to show a partial cross section, and the bevel angle θ must be obtuse. Experimental results have shown that if θ is 120 degrees or more, chipping and chipping will hardly occur. . In addition, the occurrence of chipping, chipping, etc. can be greatly reduced by giving it a roundness as shown in Figure B. In this case, the size of the roundness is 1mm in radius of curvature (R). As mentioned above, preferably a radius of curvature (R) of 2 mm or more was effective. In the hammer shown in Fig. 1, the entire head 2 is made of ceramic, but this is not limitative.As shown in Fig. 3, only the part forming the striking surface is used. The ceramic member 2a is disposed on one side, and the main body 2b may be made of metal or synthetic resin, and as shown in FIG. In order to make the head 2 suitable for the object,
A composite head may be constructed by combining head members 2c made of copper, rubber, wood, or the like. As described above, according to the present invention, since at least the part forming the striking surface of the head is made of ceramic material, there is no negative magnetic or electrical influence on the object to be struck, and chemical During assembly and inspection work at equipment-related sites, sparks, corrosion, and rust do not occur, and the high hardness of the striking surface prevents friction and scratches, resulting in a mirror-like striking surface. Because of the friction, it has many features such as there is no risk of scratching the surface of the workpiece when it is used to spread gold to make gold leaf or to make arts and crafts. A hammer can be provided.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明実施例によるセラミツク製ハン
マーを示す斜視図、第2図イ,ロは第1図におけ
るX−X線における部分断面図を示したもの、第
3図a,bはそれぞれ本発明によるセラミツク製
ハンマーを構成するヘツドのみの他の例を示す側
面図である。 1:ハンドル、2:ヘツド。
FIG. 1 is a perspective view showing a ceramic hammer according to an embodiment of the present invention, FIGS. 2A and 2B are partial sectional views taken along the line X-X in FIG. FIG. 7 is a side view showing another example of only the head constituting the ceramic hammer according to the invention. 1: Handle, 2: Head.

Claims (1)

【特許請求の範囲】[Claims] 1 少なくとも打当面をアルミナ、炭化珪素、窒
化珪素、ジルコニア、サイアロン等のセラミツク
で形成するとともに、この打当面のコーナー部に
斜切角120°以上の面取り、または曲率半径1mm以
上の丸みを形成したことを特徴とするセラミツク
製ハンマー。
1 At least the striking surface is made of ceramic such as alumina, silicon carbide, silicon nitride, zirconia, sialon, etc., and the corners of this striking surface are chamfered with a bevel angle of 120° or more, or rounded with a radius of curvature of 1 mm or more. A ceramic hammer characterized by:
JP20957282A 1982-11-29 1982-11-29 Hammer made of ceramic Granted JPS5997856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20957282A JPS5997856A (en) 1982-11-29 1982-11-29 Hammer made of ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20957282A JPS5997856A (en) 1982-11-29 1982-11-29 Hammer made of ceramic

Publications (2)

Publication Number Publication Date
JPS5997856A JPS5997856A (en) 1984-06-05
JPH0349713B2 true JPH0349713B2 (en) 1991-07-30

Family

ID=16575048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20957282A Granted JPS5997856A (en) 1982-11-29 1982-11-29 Hammer made of ceramic

Country Status (1)

Country Link
JP (1) JPS5997856A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6272073U (en) * 1985-10-23 1987-05-08
JP7316670B2 (en) * 2020-11-12 2023-07-28 株式会社テオス Low-pollution impact tool for crushing silicon

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS475468U (en) * 1971-02-12 1972-09-18

Also Published As

Publication number Publication date
JPS5997856A (en) 1984-06-05

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