JPH0788660B2 - Deformed muscle anchor and its manufacturing method - Google Patents
Deformed muscle anchor and its manufacturing methodInfo
- Publication number
- JPH0788660B2 JPH0788660B2 JP14281393A JP14281393A JPH0788660B2 JP H0788660 B2 JPH0788660 B2 JP H0788660B2 JP 14281393 A JP14281393 A JP 14281393A JP 14281393 A JP14281393 A JP 14281393A JP H0788660 B2 JPH0788660 B2 JP H0788660B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- deformed
- tube portion
- fitted
- anchor
- 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 - Fee Related
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
- Dowels (AREA)
- Insertion Pins And Rivets (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明はコンクリートのブロツク
造り建築工事や間仕切り工事、鉄筋出し土木工事などに
使われる異形差筋アンカーと、その製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deformed bar anchor used for concrete block construction work, partition work, steel bar construction civil work, and the like, and a manufacturing method thereof.
【0002】[0002]
【従来の技術】この種の本発明に最も近似する公知技術
としては、特開平5−18408号が提案されており、
これでは筒(2)を高温に加熱して赤色化するか、又は
その筒(2)と異形鉄筋(1)との両者を加熱赤色化し
た上、互いに嵌合させた状態において、その筒(2)に
外圧を加えることにより、上記鉄筋(1)の表面へ圧着
させ、その後の自然冷却による収縮作用とも相俟って、
両者を密着一体化させるようになっている。2. Description of the Related Art As a known technique most similar to the present invention of this type, JP-A-5-18408 has been proposed.
In this case, the tube (2) is heated to a high temperature to turn red, or both the tube (2) and the deformed rebar (1) are heated to red and then the tube ( By applying external pressure to 2), it is pressure-bonded to the surface of the rebar (1), and in combination with the contraction action by natural cooling thereafter,
They are designed to be in close contact with each other.
【0003】[0003]
【発明が解決しようとする課題】ところが、これによれ
ばその理論的に高い引張強度を得られる利点があると雖
も、上記筒(2)や鉄筋(1)を高温にて加熱赤色化す
る製造工程が不可欠であり、その実際上筒(2)や鉄筋
(1)を放熱しない状態に保ちつつ、その筒(2)をプ
レス機械などにより加圧しなければならないので、その
高温の維持管理が困難であると共に、作業の環境条件と
しても悪くなる。However, according to this, there is an advantage that theoretically high tensile strength can be obtained, and the 雖 also heats the cylinder (2) and the reinforcing bar (1) at high temperature to make them red. Since the manufacturing process is indispensable and the cylinder (2) and the reinforcing bar (1) are kept in a state where heat is not dissipated, the cylinder (2) must be pressurized by a press machine, etc. Not only is it difficult, but it also worsens the environmental conditions of work.
【0004】例えば、上記筒(2)や鉄筋(1)をプレ
ス加工ラインに沿い自動搬送し、その搬送過程において
加熱赤色化と加圧を行なうことが事実上不可能であり、
その搬送帯などの焼き付き事故を防ぐ対策も必要となる
ため、量産には不向きな製造法であると言わざるを得な
い。For example, it is practically impossible to automatically convey the cylinder (2) and the reinforcing bar (1) along a press working line, and to perform heating and reddening and pressurization in the conveying process.
It must be said that this is a manufacturing method that is not suitable for mass production, because it is necessary to take measures to prevent the seizure of the carrier belt.
【0005】又、上記筒(2)は単純なパイプ材のカツ
ト品として、その肉厚の全体的に均一であり、鉄筋
(1)の表面に膨出する節の高さ寸法分だけで咬み合う
に過ぎない加圧状態のため、その製品を使用するに当っ
て、上記鉄筋(1)をハンマーなどにより不正に叩打し
た時や、例えばコンクリートブロツク塀への埋込み使用
中に、強い風圧を繰り返し受けた時などには、切り込み
(4)の付与された筒(2)が、その鉄筋(1)の先端
部と対応位置する中途部から折損したり、或いは欠落し
たりするおそれがある。Further, the cylinder (2) is a cut product made of a simple pipe material and has a uniform thickness throughout, and bites only by the height dimension of the node bulging on the surface of the reinforcing bar (1). Due to the pressurizing condition that is only suitable, when using the product, when the reinforcing bar (1) is struck by a hammer etc. illegally, or when it is embedded in a concrete block wall, for example, strong wind pressure is repeated. When received, the cylinder (2) provided with the notch (4) may be broken or missing from a midway portion corresponding to the tip of the reinforcing bar (1).
【0006】更に、上記筒(2)や鉄筋(1)を高温に
より加熱赤色化しているため、仕上がり製品の表面に発
錆した如き焼け跡又は変色が見苦しく残存露呈し、販売
上の商品価値を低下させるほか、その使用上の不安感を
与えることにもなる。Further, since the tube (2) and the reinforcing bar (1) are heated and reddened by high temperature, a burnt mark or discoloration such as rust on the surface of the finished product is unsightly exposed and the commercial value of the product is reduced. In addition to that, it also gives anxiety about its use.
【0007】[0007]
【課題を解決するための手段】本発明はこのような課題
の改良を企図しており、そのために異形差筋アンカーと
して、基端側が薄肉な差し込み口筒部として、先端側が
拡開用割溝を備えた厚肉な拡開口筒部として、その両口
筒部の段付き穴形態に造形すると共に、上記拡開口筒部
にその拡開用プラグを部分的に圧入した円筒型のアンカ
ースリーブと、先端部から上記アンカースリーブの拡開
口筒部に嵌入し得る径小なセンター凸子を突設した異形
鉄筋とから成り、その異形鉄筋の先端部に上記アンカー
スリーブの差し込み口筒部を差し込み套嵌させ、且つそ
の差し込み口筒部を上記異形鉄筋の先端部へかしめ付け
一体化したことを特徴とする。DISCLOSURE OF THE INVENTION The present invention intends to improve such a problem. Therefore, as a deformed differential bar anchor, a proximal end side is a thin-walled insertion tube portion, and a distal end side is an expanding split groove. And a cylindrical anchor sleeve in which the expansion plug is partially press-fitted into the expansion cylinder, as well as a thick expansion cylinder having a stepped hole shape at both ends of the cylinder. , A deformed rebar having a small-diameter center protrusion projecting from the tip of the deformable rebar that can be fitted into the expansion opening of the anchor sleeve, and the insertion port cylinder of the anchor sleeve is inserted into the tip of the deformed rebar. It is characterized in that it is fitted and the insertion port cylinder portion is caulked and integrated with the tip end portion of the deformed rebar.
【0008】又、上記異形差筋アンカーの製造法とし
て、第1にアンカースリーブを特殊鋼の塑性加工又は切
削加工により、その基端側に薄肉な差し込み口筒部と先
端側に厚肉な拡開口筒部とを備えた段付き穴形態に造形
して、その拡開用割溝を付与した拡開口筒部に、楔作用
する鋼塊のプラグをその先端の部分的な張り出し状態に
圧入する一方、異形鉄筋の先端部を塑性加工又は切削加
工することにより、上記アンカースリーブの拡開口筒部
に嵌入し得る径小なセンター凸子を突設して、上記異形
鉄筋の先端部にアンカースリーブの差し込み口筒部を差
し込み套嵌させた上、その差し込み口筒部を冷間加工の
もとで、上記異形鉄筋の節と咬み合うようにかしめ付け
一体化することを特徴とし、As the method for manufacturing the deformed bar anchor, firstly, the anchor sleeve is formed by plastic working or cutting of special steel so that the proximal end side has a thin insertion tube portion and the distal end side has a thick expansion. A stepped hole shape having an opening tubular portion is formed, and a plug of a steel ingot acting as a wedge is press-fitted into a partially overhanging state at the tip of the opening inflating tubular portion provided with an expanding split groove. On the other hand, by plastically working or cutting the end of the deformed bar, a small-diameter center protrusion that can be fitted into the expansion opening cylindrical part of the anchor sleeve is projected, and the anchor sleeve is attached to the end of the deformed bar. After inserting and fitting the insertion port tubular part of the above, under the cold working, the insertion port tubular part is characterized by being caulked and integrated so as to interlock with the node of the deformed rebar,
【0009】第2に、アンカースリーブを特殊鋼の塑性
加工又は切削加工により、その基端側に薄肉な差し込み
口筒部と先端側に厚肉な拡開口筒部とを備えた段付き穴
形態に造形して、その拡開用割溝を付与した拡開口筒部
に、楔作用する鋼塊のプラグをその先端の部分的な張り
出し状態に圧入する一方、異形鉄筋の先端部を塑性加工
することにより、その先端部に複数の凹周溝と凸周条と
を刻設すると共に、同じく異形鉄筋の先端部から上記ア
ンカースリーブの拡開口筒部に嵌入し得る径小なセンタ
ー凸子を突設して、上記異形鉄筋の先端部にアンカース
リーブの差し込み口筒部を差し込み套嵌させた上、その
差し込み口筒部を冷間加工のもとで、上記異形鉄筋の凹
周溝並びに凸周条と咬み合うようにかしめ付け一体化す
ることを特徴とするものである。Secondly, the anchor sleeve is formed by plastic working or cutting of special steel to form a stepped hole having a thin insertion tube portion on the base end side and a thick expansion tube portion on the tip end side. The plug of the ingot that acts as a wedge is press-fitted into the expanded tubular part that is provided with the expanding split groove, with the tip part of the plug protruding, while the tip part of the deformed bar is plastically processed. With this, a plurality of concave circumferential grooves and convex ridges are engraved at the tip end portion thereof, and a small-diameter center projection that can be fitted into the expansion opening tubular portion of the anchor sleeve is also projected from the tip end portion of the deformed rebar. And insert the insertion port tube portion of the anchor sleeve into the tip of the deformed rebar, and then, by cold working the insertion port tube portion, form the concave circumferential groove and the convex periphery of the deformed rebar. It is characterized by being caulked and integrated so as to engage with the strip It is intended.
【0010】[0010]
【作用】上記第1発明の構成によれば、異形鉄筋の先端
部からアンカースリーブの拡開口筒部へ嵌入し得る径小
なセンター凸子が突設されており、そのセンター凸子が
アンカースリーブにおける拡開口筒部の内部を詰める如
く拘束した状態のもとで、同じくアンカースリーブの差
し込み口筒部が異形鉄筋の先端部にかしめ付け一体化さ
れているため、その異形差筋アンカーをコンクリート面
へ埋め込み作業する際、その鉄筋が自己の軸線に沿わな
い方向から不正に叩打されたり、又使用中に剪断方向か
らの風圧やその他の外力を受けたりするも、上記アンカ
ースリーブがその差し込み口筒部と拡開口筒部との境界
段部付近から折損するおそれなく、高い剪断強度と引張
強度を維持し得るのである。According to the structure of the first aspect of the invention, the center projection having a small diameter which can be fitted into the expansion opening cylindrical portion of the anchor sleeve from the tip of the deformed bar is projected, and the center projection is the anchor sleeve. Under the condition that the inside of the expansion opening in the section is constrained so as to be packed, the insertion section tube section of the anchor sleeve is also caulked and integrated with the tip of the deformed rebar, so When the embedding work is performed on the rebar, if the reinforcing bar is illegally struck from a direction that does not follow its own axis, or if it receives wind pressure or other external force from the shearing direction during use, the anchor sleeve will be The high shear strength and the high tensile strength can be maintained without the possibility of breaking from the vicinity of the boundary step portion between the section and the expanded opening tubular portion.
【0011】又、その異形差筋アンカーの製造法とし
て、上記第2発明の構成を採用すれば、アンカースリー
ブの差し込み口筒部を異形鉄筋の先端部へ、その縦節や
横節と咬み合うかしめ付け状態として、冷間加工のもと
に塑性変形されるようになっているため、そのアンカー
スリーブや異形鉄筋を加熱赤色化する従来技術に比し、
焼け跡や変色を起すおそれがなく、商品価値の高い異形
差筋アンカーを得られるほか、困難な高温の維持管理を
行なう必要もないので、量産効果を最大限に期待できる
製造法であると言える。Further, if the configuration of the second invention is adopted as a method for manufacturing the deformed differential bar anchor, the insertion sleeve tube portion of the anchor sleeve is engaged with the distal end portion of the deformed reinforcing bar to engage with the longitudinal segment or the transverse segment. As it is caulked, it is plastically deformed under cold working, so compared to the conventional technology of heating its anchor sleeve and deformed bar to heat red,
It can be said that this is a manufacturing method that can be expected to maximize the mass production effect because there is no risk of burning marks or discoloration, a deformed bar anchor with high commercial value can be obtained, and there is no need to perform difficult high temperature maintenance.
【0012】更に、上記第3発明の製造法によれば、異
形鉄筋の先端部に複数の凹周溝と凸周条とを刻設すべ
く、その予備的に塑性加工した上、これに差し込み套嵌
させたアンカースリーブの差し込み口筒部を、その凹周
溝並びに凸周条と咬み合う状態として、やはり冷間加工
のもとにかしめ付け一体化するようになっているため、
その異形差筋アンカーの剪断強度と引張強度をますます
昂め得る効果がある。Further, according to the manufacturing method of the third aspect of the present invention, a plurality of concave circumferential grooves and convex circumferential grooves are preliminarily plastic-worked so as to be engraved at the tip end of the deformed bar, and then inserted into this. Since the insertion sleeve tube portion of the anchor sleeve that has been fitted is in a state of engaging with the concave circumferential groove and the convex circumferential strip, it is also caulked and integrated under cold working,
It has the effect of increasing the shear strength and tensile strength of the deformed bar anchor.
【0013】[0013]
【実施例】以下、図面に基いて本発明の詳細を説明する
と、その異形差筋アンカー(製品)を示した図1〜3に
おいて、(A)はコンクリート用棒鋼から成る一定長さ
の異形鉄筋であり、その外周面に格子形態や千鳥形態な
どとして交錯する縦節(11)と横節(12)とを備え
ている。(D1)はその横節(12)を含まない鉄筋
(A)の外径寸法、(D2)は同じく横節(12)を含
む鉄筋(A)の最外径寸法を各々示唆している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. In FIGS. 1 to 3 showing the deformed bar anchors (products), (A) is a deformed bar of a constant length made of a steel bar for concrete. Further, the outer peripheral surface thereof is provided with vertical segments (11) and horizontal segments (12) intersecting with each other in a lattice form or a zigzag form. (D1) indicates the outer diameter dimension of the reinforcing bar (A) not including the transverse joint (12), and (D2) indicates the outermost diameter dimension of the reinforcing bar (A) also including the transverse joint (12).
【0014】又、(13)は上記鉄筋(A)の先端部か
ら連続一体に突出するセンター凸子であって、その鉄筋
(A)の先端部を切削加工又は塑性加工することによ
り、上記外径寸法(D1)よりも小さな外径寸法(D
3)を有する一定長さ(L1)の円柱型に造形されてい
る。Further, (13) is a center convex member that continuously and integrally projects from the tip of the reinforcing bar (A), and the tip of the reinforcing bar (A) is cut or plastically worked to form the outer portion. Outer diameter (D1) smaller than diameter (D1)
3) and is shaped into a cylindrical shape having a constant length (L1).
【0015】他方、(B)は熱処理された特殊鋼から外
径寸法(D4)の一定な円筒型をなすアンカースリーブ
であるが、その基端側は上記鉄筋(A)への薄肉な差し
込み口筒部(14)として、残る先端側は厚肉な拡開口
筒部(15)として、その両口筒部(14)(15)の
内径寸法(d1)(d2)が相違変化する所謂段付き穴
形態に造形されている。On the other hand, (B) is an anchor sleeve made of heat-treated special steel and having a constant outer diameter (D4) and having a cylindrical shape. The proximal end side of the anchor sleeve has a thin insertion port into the reinforcing bar (A). As the tubular portion (14), the remaining tip end side is a thick walled tubular portion (15), and the so-called stepped portion in which the inner diameter dimensions (d1) (d2) of the both-end tubular portions (14) and (15) change differently It is shaped like a hole.
【0016】その場合、上記差し込み口筒部(14)の
内径寸法(d1)は異形鉄筋(A)の最外径寸法(D
2)にほぼ等しく、又拡開口筒部(15)の内径寸法
(d2)は上記センター凸子(13)の外径寸法(D
3)にほぼ等しく設定されている。(16)はその両口
筒部(14)(15)内の境界段部を示している。In this case, the inner diameter dimension (d1) of the insertion tube portion (14) is the outermost diameter dimension (D) of the deformed bar (A).
2), and the inner diameter dimension (d2) of the expanded opening tubular portion (15) is the outer diameter dimension (D) of the center projection (13).
It is set almost equal to 3). Reference numeral (16) indicates a boundary step portion inside the double-ended tube portions (14) and (15).
【0017】このようなアンカースリーブ(B)は、特
殊鋼棒からの段階的な冷間鍛造やその他の塑性加工を初
め、厚肉な特殊鋼管の基端側を切削加工して、上記薄肉
の差し込み口筒部(14)に仕上げる方法によって造形
することができる。Such an anchor sleeve (B) is made by cutting the base end side of a thick-walled special steel pipe, such as stepwise cold forging from a special steel rod and other plastic working, and cutting the thin-walled one. It can be shaped by the method of finishing the insertion tube portion (14).
【0018】(17)はアンカースリーブ(B)の厚肉
な拡開口筒部(15)へ、その先端から上記境界段部
(16)に到達しない一定深さ(L2)として切り込ま
れた割溝であり、十文字型などの放射対称型に配分され
ている。(18)はその先端からの拡開作用を促進する
と共に、コンクリートとの喰い付き力を昂める複数の凹
周溝であり、上記拡開口筒部(15)の外周面に刻成さ
れている。Reference numeral (17) is a slit cut into the thick walled cylindrical portion (15) of the anchor sleeve (B) at a constant depth (L2) that does not reach the boundary step (16) from its tip. It is a groove and is distributed in a radial symmetry type such as a cross shape. Reference numeral (18) is a plurality of concave circumferential grooves for promoting the spreading action from the tip thereof and for suppressing the biting force with the concrete, which is engraved on the outer peripheral surface of the spreading opening cylindrical portion (15). There is.
【0019】又、(19)はやはり熱処理された特殊鋼
塊のプラグであり、楔作用し得る截頭円錐型又は弾丸型
をなしているが、その径小な基端部は円柱型として、上
記アンカースリーブ(B)の拡開口筒部(15)へ脱落
不能に圧入されている。Further, (19) is also a plug of heat-treated special steel ingot, which has a truncated cone shape or a bullet shape capable of acting as a wedge, and its base end having a small diameter has a cylindrical shape. The anchor sleeve (B) is press-fitted into the wide-opening tubular portion (15) so as not to fall off.
【0020】そのプラグ(19)の径大な先端部は上記
拡開口筒部(15)から一定長さ(L3)だけ張り出す
状態にあり、これを拡開口筒部(15)内へ没入させる
如く、そのアンカースリーブ(B)を相対的に進出移動
させた時、そのアンカースリーブ(B)の拡開口筒部
(15)がプラグ(19)の楔作用により、先端から拡
開するようになっている。The large-diameter tip portion of the plug (19) is in a state of overhanging from the expanding opening cylindrical portion (15) by a predetermined length (L3), and is immersed in the expanding opening cylindrical portion (15). As described above, when the anchor sleeve (B) is relatively advanced and moved, the expansion opening cylindrical portion (15) of the anchor sleeve (B) is expanded from the tip end by the wedge action of the plug (19). ing.
【0021】そして、上記のような鉄筋(A)とアンカ
ースリーブ(B)とから本発明の異形差筋アンカーを製
造する当っては、先づその鉄筋(A)の先端部へアンカ
ースリーブ(B)の薄肉な差し込み口筒部(14)を差
し込み套嵌させるのである。When manufacturing the deformed bar anchor of the present invention from the reinforcing bar (A) and the anchor sleeve (B) as described above, the anchor sleeve (B) is first attached to the tip of the reinforcing bar (A). The thin insertion tube portion (14) is inserted and fitted.
【0022】そうすれば、図4から明白な通り、鉄筋
(A)の先端部がアンカースリーブ(B)内の境界段部
(16)によって正しく受け止め規制されると共に、そ
の鉄筋(A)の先端部から一定長さ(L1)だけ突出す
るセンター凸子(13)が、アンカースリーブ(B)の
厚肉な拡開口筒部(15)まで嵌入して、その内部を詰
める如くに拘束することとなる。Then, as is apparent from FIG. 4, the tip of the reinforcing bar (A) is correctly received and regulated by the boundary step (16) in the anchor sleeve (B), and the tip of the reinforcing bar (A) is also regulated. A center protrusion (13) protruding from the portion by a certain length (L1) is fitted into the thick walled cylindrical portion (15) of the anchor sleeve (B) and constrained so as to stuff the inside. Become.
【0023】そこで、次にアンカースリーブ(B)の差
し込み口筒部(14)をプレス加工金型(20)(2
1)により、その外周面から冷間にて加圧し、図5のよ
うに鉄筋(A)の両節(11)(12)と咬み合うかし
め付け状態に塑性変形させるのであり、その両者の離脱
不能な固定状態を保つ異形差筋アンカーとして完成す
る。Therefore, next, the insertion port cylinder portion (14) of the anchor sleeve (B) is pressed into the press dies (20) (2).
By 1), cold pressing is applied from the outer peripheral surface of the reinforcing bar (A) to plastically deform it into a crimped state in which it meshes with both nodes (11) and (12) of the reinforcing bar (A), and the separation of both Completed as a deformed differential muscle anchor that maintains an impossible fixed state.
【0024】上記アンカースリーブ(B)の塑性変形は
冷間加工として行なわれるため、今鉄筋(A)の先端部
からアンカースリーブ(B)の拡開口筒部(15)へ嵌
入する上記センター凸子(13)が無いと仮定した場合
には、その鉄筋(A)の先端部とプラグ(19)の基端
部との相互間を占めるアンカースリーブ(B)の内部
は、言わば詰め物の無い非拘束状態に放任されているた
め、上記加圧力がアンカースリーブ(B)の差し込み口
筒部(14)から拡開口筒部(15)に波及して、その
両口筒部(14)(15)の境界段部(16)付近から
不慮に折損するおそれがあり、このことはアンカースリ
ーブ(B)の拡開口筒部(15)が差し込み口筒部(1
4)に比して厚肉であると雖も、上記割溝(17)を有
する以上、その危険性を伴なうことになる。Since the plastic deformation of the anchor sleeve (B) is performed as cold working, the center convex member fitted from the tip of the reinforcing bar (A) into the expanded opening cylindrical portion (15) of the anchor sleeve (B) now. Assuming that there is no (13), the inside of the anchor sleeve (B) occupying the space between the distal end of the reinforcing bar (A) and the proximal end of the plug (19) is, so to speak, unconstrained without a padding. Since it is left in the state, the above-mentioned pressing force spreads from the insertion opening tubular portion (14) of the anchor sleeve (B) to the expansion opening tubular portion (15), and both opening tubular portions (14) and (15) There is a risk of accidental breakage from the vicinity of the boundary step (16), which means that the expansion opening cylinder (15) of the anchor sleeve (B) is inserted into the insertion tube (1).
As compared with the case of 4), the thickness of the leech is also accompanied by the danger because it has the above-mentioned split groove (17).
【0025】この点、本発明では鉄筋(A)の先端部か
ら一定長さ(L1)だけ突出するセンター凸子(13)
が、上記アンカースリーブ(B)における差し込み口筒
部(14)と拡開口筒部(15)との境界段部(16)
を越えて、その拡開口筒部(15)まで嵌入する関係状
態にあり、これを内部から突っ張り支持する如く拘束し
ているため、上記加圧力に対抗する高い剪断強度を得ら
れ、折損するおそれがない。従って又、上記差し込み口
筒部(14)を制約なく強力に加圧できることとなり、
その異形差筋アンカーの引張強度もますます昂め得るの
である。In this respect, according to the present invention, the center projection (13) protruding from the tip of the reinforcing bar (A) by a constant length (L1).
However, in the anchor sleeve (B), a boundary step portion (16) between the insertion port tubular portion (14) and the wide opening tubular portion (15).
Since it is in a state of being fitted to the expanded opening cylindrical portion (15) beyond the above, and is restrained so as to be stretched and supported from the inside, high shear strength against the above-mentioned pressing force can be obtained, and there is a risk of breakage. There is no. Therefore, it is possible to pressurize the insertion tube portion (14) strongly without any restriction.
The tensile strength of the deformed bar anchor can be further increased.
【0026】尚、このようにして製造された異形差筋ア
ンカーでは、図5から明白なように、そのプラグ(1
9)の基端部とセンター凸子(13)の先端部との相互
間隙(S)が、上記拡開口筒部(15)の先端から張り
出すプラグ(19)の張り出し長さ(L3)と同じか、
又はこれよりも長大に寸法化されていること、言うまで
もない。In the deformed muscle anchor manufactured in this manner, as is apparent from FIG. 5, the plug (1
The mutual gap (S) between the base end part of 9) and the tip part of the center convex element (13) is equal to the protruding length (L3) of the plug (19) protruding from the tip of the expanding cylindrical part (15). Same or
Needless to say, it is sized larger than this.
【0027】次に、図6〜9は本発明の変形実施例を示
しており、その構成上図1〜5の基本実施例と異なる点
を要説すると、下記の通りである。Next, FIGS. 6 to 9 show a modified embodiment of the present invention, and the points different from the basic embodiment of FIGS.
【0028】つまり、上記基本実施例の場合、異形鉄筋
(A)の先端部にはセンター凸子(13)を突出させる
ほか、何等の加工も施さず、その言わば現状有姿の節
(11)(12)と咬み合うかしめ付け状態として、ア
ンカースリーブ(B)の差し込み口筒部(14)を塑性
変形させているにとどまるが、変形実施例では更に鉄筋
(A)の先端部をプレスやローリング、スエージングな
どの方法により予備的に塑性加工して、その先端部に複
数の凹周溝(22)と凸周条(23)とを交互に造形し
ている。In other words, in the case of the above-mentioned basic embodiment, the center convex element (13) is projected at the tip of the deformed bar (A), and no processing is performed. In the caulking state in which it engages with (12), the insertion opening tubular portion (14) of the anchor sleeve (B) is only plastically deformed, but in the modified embodiment, the tip of the reinforcing bar (A) is further pressed or rolled. , A plurality of concave circumferential grooves (22) and convex circumferential stripes (23) are alternately formed at the tip of the plastic working by a method such as swaging.
【0029】その際、その凹周溝(22)での外径寸法
(D5)を上記鉄筋(A)の外径寸法(D1)よりも小
さく、又凸周条(23)での外径寸法(D6)を同じく
鉄筋(A)の最外径寸法(D2)とほぼ等しく、各々設
定することが望ましい。At this time, the outer diameter dimension (D5) of the concave circumferential groove (22) is smaller than the outer diameter dimension (D1) of the reinforcing bar (A), and the outer diameter dimension of the convex circumferential strip (23). It is desirable that (D6) be set to be substantially equal to the outermost diameter dimension (D2) of the reinforcing bar (A), respectively.
【0030】そして、その凹周溝(22)と凸周条(2
3)とが整然と刻設された鉄筋(A)の先端部へ、引き
続きアンカースリーブ(B)の差し込み口筒部(14)
をやはり差し込み套嵌させた上、その差し込み口筒部
(14)を上記基本実施例と同じく、鉄筋(A)の凹周
溝(22)並びに凸周条(23)と咬み合うかしめ付け
状態として、その冷間加工のもとに塑性変形させるので
ある。The concave circumferential groove (22) and the convex circumferential groove (2)
3) To the tip of the reinforcing bar (A) in which the and are orderly engraved, continue to the insertion tube portion (14) of the anchor sleeve (B).
Is also inserted and fitted, and the insertion port tube portion (14) is crimped to engage with the concave circumferential groove (22) and the convex circumferential strip (23) of the reinforcing bar (A) as in the above-described basic embodiment. , It is plastically deformed under the cold working.
【0031】このような変形実施例の構成を採用するな
らば、上記仕上げの塑性変形をプレス加工のみならず、
ローリング加工としても実行できることになり、その製
品−異形差筋アンカーの引張強度を上記基本実施例のそ
れに比して、更に一層昂めることができる。If the structure of such a modified embodiment is adopted, not only the plastic deformation for finishing as described above is performed by press working,
Since it can be performed as a rolling process, the tensile strength of the product-deformed bar anchor can be further improved as compared with that of the above-mentioned basic embodiment.
【0032】尚、図6〜9の変形実施例におけるその他
の構成は、上記基本実施例と実質的に同一であるため、
その図6〜9に図1〜5との対応符号を記入するにとど
めて、その詳細な説明を省略する。Since the other constructions of the modified embodiments of FIGS. 6 to 9 are substantially the same as those of the basic embodiment,
6-9, only the corresponding symbols to those of FIGS. 1-5 are entered, and the detailed description thereof is omitted.
【0033】何れにしても、上記のように製造された異
形差筋アンカーは、例えばコンクリートブロツク塀の建
築工事において、そのコンクリート面(M)にドリル加
工された埋め込み溝(G)内へ、その先端部のアンカー
スリーブ(B)が図10のように埋没する状態として挿
入使用される。In any case, the deformed bar anchor manufactured as described above is inserted into the embedded groove (G) drilled in the concrete surface (M) in the construction work of a concrete block wall, for example. The anchor sleeve (B) at the tip end is used by being inserted as shown in FIG.
【0034】そして、その後コンクリート面(M)から
露出している鉄筋(A)を、ハンマー(24)などによ
り叩打するのであり、そうすれば上記埋め込み溝(G)
の底部に突っ張り制止されたプラグ(19)と相対し
て、その鉄筋(A)と一体をなすアンカースリーブ
(B)が進出移動するため、そのアンカースリーブ
(B)の拡開口筒部(15)が図11のように先端から
拡開作用して、コンクリートと離脱不能に喰い付き固定
することとなり、上記コンクリートブロツク塀の強力な
骨格を形作る。Then, the reinforcing bar (A) exposed from the concrete surface (M) is then tapped with a hammer (24) or the like, and then the embedding groove (G).
Since the anchor sleeve (B) which is integral with the reinforcing bar (A) advances and moves relative to the plug (19) which is restrained by being stretched at the bottom of the anchor sleeve (B), the expansion sleeve cylinder (15) of the anchor sleeve (B) is moved. 11 spreads from the tip as shown in FIG. 11 to bite and fix the concrete irremovably, forming a strong skeleton of the concrete block fence.
【0035】その場合、上記ハンマー(24)などの叩
打力が鉄筋(A)の軸線に沿って正しく付加されなかっ
たり、又コンクリートブロツク塀の骨格として使用中
に、その剪断方向から繰り返し風圧を受けたりしても、
上記異形差筋アンカーにおけるアンカースリーブ(B)
の折損するおそれがなく、その耐久性に富む剪断強度を
維持することができる。In this case, the hammering force of the hammer (24) or the like is not properly applied along the axis of the reinforcing bar (A), or the wind force is repeatedly applied from the shearing direction during the use as the skeleton of the concrete block fence. Even if
Anchor sleeve (B) in the deformed muscle anchor
It is possible to maintain the shear strength which is rich in durability without fear of being broken.
【0036】[0036]
【発明の効果】以上のように、本発明の異形差筋アンカ
ーではその構成上、基端側が薄肉な差し込み口筒部(1
4)として、先端側が拡開用割溝(17)を備えた厚肉
な拡開口筒部(15)として、その両口筒部(14)
(15)の段付き穴形態に造形すると共に、上記拡開口
筒部(15)にその拡開用プラグ(19)を部分的に圧
入した円筒型のアンカースリーブ(B)と、先端部から
上記アンカースリーブ(B)の拡開口筒部(15)に嵌
入し得る径小なセンター凸子(13)を突設した異形鉄
筋(A)とから成り、その異形鉄筋(A)の先端部に上
記アンカースリーブ(B)の差し込み口筒部(14)を
差し込み套嵌させ、且つその差し込み口筒部(14)を
上記異形鉄筋(A)の先端部へかしめ付け一体化してあ
るため、冒頭に述べた従来技術の課題を確実に改良でき
る効果がある。As described above, in the deformed differential bar anchor of the present invention, due to its constitution, the proximal end side has a thin walled insertion tube portion (1).
4) As a thick-walled wide-opening tube portion (15) having a splitting groove (17) on the front end side, a double-ended tube portion (14).
(15) A cylindrical anchor sleeve (B) formed in the stepped hole form and having the expansion plug (19) partially press-fitted into the expansion cylinder (15), and the above from the tip. The deformed rebar (A) is provided with a center projection (13) having a small diameter that can be fitted into the expansion opening cylindrical part (15) of the anchor sleeve (B). Since the insertion port tube portion (14) of the anchor sleeve (B) is inserted and fitted and the insertion port tube portion (14) is caulked and integrated with the tip end portion of the deformed rebar (A), it is described at the beginning. Moreover, there is an effect that the problems of the conventional technology can be surely improved.
【0037】即ち、上記構成によれば、異形鉄筋(A)
の先端部から連続一体に突出する径小なセンター凸子
(13)が、アンカースリーブ(B)の厚肉な拡開口筒
部(15)に嵌入されており、その内部を詰める如くに
拘束した状態のもとで、同じくアンカースリーブ(B)
の薄肉な差し込み口筒部(14)が上記鉄筋(A)の先
端部へ、かしめ付け一体化された製品となっているた
め、これをコンクリート面(M)の埋め込み溝(G)へ
埋め込み作業する際、その異形鉄筋(A)が自己の軸線
に沿わない方向から不正に叩打されたり、又使用中に剪
断方向からの風圧やその他の外力を受けたりするも、こ
れにかしめ付けられているアンカースリーブ(B)が、
その差し込み口筒部(14)と拡開口筒部(15)との
境界段部(16)付近から不慮に折損するおそれなく、
常に高い剪断強度と引張強度を維持することができる。That is, according to the above configuration, the deformed bar (A)
A small-diameter center protrusion (13) that continuously and integrally projects from the distal end of the is inserted into the thick walled cylindrical portion (15) of the anchor sleeve (B), and the inside is constrained so as to be packed. Under the condition, also anchor sleeve (B)
Since the thin-walled insertion tube portion (14) of (1) is a product that is caulked and integrated with the tip portion of the reinforcing bar (A), it is embedded in the embedding groove (G) of the concrete surface (M). When deformed, the deformed rebar (A) is illegally struck from a direction that does not follow its own axis, or it receives wind pressure or other external force from the shearing direction during use, but it is also caulked. Anchor sleeve (B)
There is no risk of accidental breakage from the vicinity of the boundary step (16) between the insertion tube portion (14) and the wide opening tube portion (15),
High shear strength and tensile strength can always be maintained.
【0038】又、上記異形差筋アンカーを製造するに当
って、請求項2に記載の通り、アンカースリーブ(B)
を特殊鋼の塑性加工又は切削加工により、その基端側に
薄肉な差し込み口筒部(14)と先端側に厚肉な拡開口
筒部(15)とを備えた段付き穴形態に造形して、その
拡開用割溝(17)を付与した拡開口筒部(15)に、
楔作用する鋼塊のプラグ(19)をその先端の部分的な
張り出し状態に圧入する一方、異形鉄筋(A)の先端部
を塑性加工又は切削加工することにより、上記アンカー
スリーブ(B)の拡開口筒部(15)に嵌入し得る径小
なセンター凸子(13)を突設して、上記異形鉄筋
(A)の先端部にアンカースリーブ(B)の差し込み口
筒部(14)を差し込み套嵌させた上、その差し込み口
筒部(14)を冷間加工のもとで、上記異形鉄筋(A)
の節(11)(12)と咬み合うようにかしめ付一体化
する方法を採用すれば、アンカースリーブ(B)の薄肉
な差し込み口筒部(14)を異形鉄筋(A)の先端部へ
差し込み套嵌させた上、その冷間加工としての塑性変形
により、縦節(11)並びに横節(12)と咬み合うよ
うにかしめ付けるようになっているため、冒頭に述べた
従来技術と異なって、その製品に見苦しい焼け跡や変色
が起らず、商品価値を大いに昂め得るほか、その製造法
としても例えばプレス加工ラインに沿って自動搬送し乍
ら、その搬送過程でのプレス加工金型(20)(21)
などにより、上記かしめ付け作用を付与することができ
ることとなり、その量産性に富む効果もある。In manufacturing the deformed muscle anchor, as described in claim 2, the anchor sleeve (B) is used.
Is formed into a stepped hole with a thin-walled insertion tube portion (14) at the base end side and a thick-walled expansion tube portion (15) at the tip end side by plastic working or cutting of special steel. To the expansion opening cylindrical portion (15) provided with the expansion split groove (17),
The wedge-shaped ingot plug (19) is press-fitted into the partially protruding state of the tip thereof, while the tip end of the deformed bar (A) is plastically worked or cut to expand the anchor sleeve (B). A center protrusion (13) having a small diameter that can be fitted into the opening tubular portion (15) is provided in a protruding manner, and the insertion tubular portion (14) of the anchor sleeve (B) is inserted into the distal end portion of the deformed bar (A). After being fitted, the deformed rebar (A) is formed by cold-working the insertion tube portion (14).
If the method of caulking and unifying with the nodes (11) and (12) of No. 1 is adopted, the thin-walled insertion tube portion (14) of the anchor sleeve (B) is inserted into the distal end portion of the deformed rebar (A). Unlike the prior art described at the beginning, it is crimped so as to engage with the longitudinal joints (11) and the transverse joints (12) by plastic deformation as cold working after being fitted. In addition to unsightly burn marks and discoloration on the product, the product value can be greatly enhanced, and the manufacturing method is, for example, automatic transfer along the press processing line, and the press processing die in the transfer process ( 20) (21)
By the above, it is possible to impart the above-mentioned crimping action, and there is an effect that the mass productivity is excellent.
【0039】更に、上記アンカースリーブ(B)の薄肉
な差し込み口筒部(14)を冷間加工のもとで、異形鉄
筋(A)の先端部へかしめ付ける製造法であると雖も、
その際には鉄筋(A)の先端部から突出する径小なセン
ター凸子(13)が、アンカースリーブ(B)の厚肉な
拡開口筒部(15)に嵌入しており、その内部から上記
加圧力に対抗するため、上記アンカースリーブ(B)が
両口筒部(14)(15)の境界段部(16)付近から
折損したり、又割溝(17)の付与された拡開口筒部
(15)の欠落したりするおそれもない。[0039] Further, the thin method of crimping the thin-walled insertion tube portion (14) of the anchor sleeve (B) to the tip portion of the deformed rebar (A) under cold working also produces
At that time, a small-diameter center projection (13) protruding from the tip of the reinforcing bar (A) is fitted into the thick walled tubular portion (15) of the anchor sleeve (B). In order to counteract the pressing force, the anchor sleeve (B) is broken from the vicinity of the boundary step portion (16) of the double-ended tube portions (14) and (15), or the expansion opening provided with the split groove (17). There is also no risk of the tubular portion (15) falling out.
【0040】特に、請求項3の製造法を採用するなら
ば、異形鉄筋(A)の先端部を予備的に塑性加工するこ
とにより、その先端部に複数の凹周溝(22)と凸周条
(23)とを刻設して、アンカースリーブ(B)の差し
込み口筒部(14)をかしめ付けた時、これが凹周溝
(22)並びに凸周条(23)と咬み合うようになって
いるため、上記効果を達成できることは勿論のこと、そ
の異形差筋アンカーの剪断強度と引張強度を更に一層昂
め得る効果もある。In particular, if the manufacturing method of claim 3 is adopted, the tip of the deformed bar (A) is preliminarily plastic-worked so that a plurality of concave circumferential grooves (22) and a convex circumference are formed at the tip. When the line (23) is engraved and the insertion port tube portion (14) of the anchor sleeve (B) is caulked, this engages with the concave circumferential groove (22) and the convex circumferential line (23). Therefore, not only the above effect can be achieved, but also the shear strength and tensile strength of the deformed bar anchor can be further enhanced.
【図1】本発明の異形差筋アンカーを示す側面図であ
る。FIG. 1 is a side view showing a deformed muscle anchor of the present invention.
【図2】そのアンカーの分解状態を示す一部破断側面図
である。FIG. 2 is a partially cutaway side view showing a disassembled state of the anchor.
【図3】図2の3−3線に沿う拡大断面図である。3 is an enlarged cross-sectional view taken along line 3-3 of FIG.
【図4】異形鉄筋に対するアンカースリーブの差し込み
状態を示す一部破断側面図である。FIG. 4 is a partially cutaway side view showing a state where the anchor sleeve is inserted into the deformed bar.
【図5】同じくアンカースリーブのかしめ付け状態を示
す一部破断側面図である。FIG. 5 is a partially cutaway side view showing a state where the anchor sleeve is also caulked.
【図6】本発明の変形実施例に係る異形鉄筋を示す側面
図である。FIG. 6 is a side view showing a deformed reinforcing bar according to a modified example of the present invention.
【図7】図6の7−7線に沿う拡大断面図である。7 is an enlarged cross-sectional view taken along line 7-7 of FIG.
【図8】図4に対応する変形実施例の一部破断側面図で
ある。8 is a partially cutaway side view of a modified example corresponding to FIG.
【図9】図5に対応する同じく変形実施例の一部破断側
面図である。9 is a partially cutaway side view of the same modified example corresponding to FIG.
【図10】異形差筋アンカーの埋め込み使用過程を示す
説明図である。FIG. 10 is an explanatory diagram showing a process of embedding and using a deformed muscle anchor.
【図11】同じく埋め込み完了状態を示す説明図であ
る。FIG. 11 is an explanatory diagram showing a state of completion of embedding similarly.
(11)・縦節 (12)・横節 (13)・センター凸子 (14)・差し込み口筒部 (15)・拡開口筒部 (17)・割溝 (19)・プラグ (22)・凹周溝 (23)・凸周条 (A)・異形鉄筋 (B)・アンカースリーブ (11) ・ Vertical joint (12) ・ Horizontal joint (13) ・ Center convex (14) ・ Inlet tube (15) ・ Expanding tube (17) ・ Split groove (19) ・ Plug (22) ・Recessed peripheral groove (23), convex peripheral strip (A), deformed reinforcing bar (B), anchor sleeve
Claims (3)
して、先端側が拡開用割溝(17)を備えた厚肉な拡開
口筒部(15)として、その両口筒部(14)(15)
の段付き穴形態に造形すると共に、上記拡開口筒部(1
5)にその拡開用プラグ(19)を部分的に圧入した円
筒型のアンカースリーブ(B)と、 先端部から上記アンカースリーブ(B)の拡開口筒部
(15)に嵌入し得る径小なセンター凸子(13)を突
設した異形鉄筋(A)とから成り、 その異形鉄筋(A)の先端部に上記アンカースリーブ
(B)の差し込み口筒部(14)を差し込み套嵌させ、
且つその差し込み口筒部(14)を上記異形鉄筋(A)
の先端部へかしめ付け一体化したことを特徴とする異形
差筋アンカー。1. A thin-walled insertion tube portion (14) on the base end side, and a thick-walled wide-opening tube portion (15) provided with a widening split groove (17) on the front end side. 14) (15)
In addition to the stepped hole shape,
5) A cylindrical anchor sleeve (B) in which the expansion plug (19) is partially press-fitted, and a small diameter that can be fitted from the tip end into the expansion opening cylindrical part (15) of the anchor sleeve (B). A deformed rebar (A) provided with a protruding center convex element (13), and the insertion port tube portion (14) of the anchor sleeve (B) is inserted into the distal end of the deformed rebar (A) and fitted.
Moreover, the deformed reinforcing bar (A) is used for the insertion tube portion (14).
Anomalous differential muscle anchor characterized by being caulked and integrated to the tip of the.
工又は切削加工により、その基端側に薄肉な差し込み口
筒部(14)と先端側に厚肉な拡開口筒部(15)とを
備えた段付き穴形態に造形して、その拡開用割溝(1
7)を付与した拡開口筒部(15)に、楔作用する鋼塊
のプラグ(19)をその先端の部分的な張り出し状態に
圧入する一方、 異形鉄筋(A)の先端部を塑性加工又は切削加工するこ
とにより、上記アンカースリーブ(B)の拡開口筒部
(15)に嵌入し得る径小なセンター凸子(13)を突
設して、 上記異形鉄筋(A)の先端部にアンカースリーブ(B)
の差し込み口筒部(14)を差し込み套嵌させた上、そ
の差し込み口筒部(14)を冷間加工のもとで、上記異
形鉄筋(A)の節(11)(12)と咬み合うようにか
しめ付け一体化することを特徴とする異形差筋アンカー
の製造法。2. An anchor sleeve (B) is formed of a special steel by plastic working or cutting work, and has a thin insertion tube portion (14) at the base end side and a thick expansion tube portion (15) at the tip end side. Is shaped into a stepped hole, and the expanding split groove (1
Into the expanded cylindrical portion (15) provided with 7), the wedge-shaped steel ingot plug (19) is press-fitted into the partially overhanging state of the tip, while the tip portion of the deformed bar (A) is plastically worked or By machining, a small-diameter center protrusion (13) that can be fitted into the wide-opening tube portion (15) of the anchor sleeve (B) is provided in a protruding manner, and the anchor is provided at the tip of the deformed rebar (A). Sleeve (B)
The insertion port cylinder part (14) is inserted and fitted, and the insertion port cylinder part (14) is engaged with the nodes (11) (12) of the deformed rebar (A) under cold working. A method for manufacturing a deformed muscle anchor which is characterized in that it is caulked and integrated.
工又は切削加工により、その基端側に薄肉な差し込み口
筒部(14)と先端側に厚肉な拡開口筒部(15)とを
備えた段付き穴形態に造形して、その拡開用割溝(1
7)を付与した拡開口筒部(15)に、楔作用する鋼塊
のプラグ(19)をその先端の部分的な張り出し状態に
圧入する一方、 異形鉄筋(A)の先端部を塑性加工することにより、そ
の先端部に複数の凹周溝(22)と凸周条(23)とを
刻設すると共に、同じく異形鉄筋(A)の先端部から上
記アンカースリーブ(B)の拡開口筒部(15)に嵌入
し得る径小なセンター凸子(13)を突設して、 上記異形鉄筋(A)の先端部にアンカースリーブ(B)
の差し込み口筒部(14)を差し込み套嵌させた上、そ
の差し込み口筒部(14)を冷間加工のもとで、上記異
形鉄筋(A)の凹周溝(22)並びに凸周条(23)と
咬み合うようにかしめ付け一体化することを特徴とする
異形差筋アンカーの製造法。3. An anchor sleeve (B) is formed of a special steel by plastic working or cutting work, and has a thin-walled insertion tube portion (14) on the base end side and a thick-walled expansion tube portion (15) on the tip end side. Is shaped into a stepped hole, and the expanding split groove (1
Into the expanded opening cylindrical part (15) provided with 7), the wedge-shaped steel ingot plug (19) is press-fitted into a partially projecting state of its tip, while the tip part of the deformed bar (A) is plastically worked. As a result, a plurality of concave circumferential grooves (22) and convex circumferential strips (23) are engraved at the tip of the anchor sleeve (B) from the tip of the deformed bar (A). A center protrusion (13) having a small diameter that can be fitted into (15) is provided in a protruding manner, and an anchor sleeve (B) is provided at the tip of the deformed bar (A).
Of the deformed rebar (A) and the convex peripheral strip, after the insertion port tube portion (14) is inserted and fitted, and the insertion port tube portion (14) is cold-worked. (23) A method for manufacturing a deformed differential muscle anchor, characterized in that it is caulked and integrated so as to engage with (23).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14281393A JPH0788660B2 (en) | 1993-05-20 | 1993-05-20 | Deformed muscle anchor and its manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14281393A JPH0788660B2 (en) | 1993-05-20 | 1993-05-20 | Deformed muscle anchor and its manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06330525A JPH06330525A (en) | 1994-11-29 |
JPH0788660B2 true JPH0788660B2 (en) | 1995-09-27 |
Family
ID=15324230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14281393A Expired - Fee Related JPH0788660B2 (en) | 1993-05-20 | 1993-05-20 | Deformed muscle anchor and its manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0788660B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5370498A (en) * | 1992-03-04 | 1994-12-06 | Rational Gmbh | Apparatus for elimination of gas constituents |
JPH0725103U (en) * | 1993-10-13 | 1995-05-12 | 鹿児島金属株式会社 | Deformed muscle anchor |
US5746556A (en) * | 1995-03-13 | 1998-05-05 | Kabushiki Kaisha Youma Kohboh | Anchor unit with expansive anchor member expanded by utilizing turning force of bolt |
JP2012220021A (en) * | 2011-04-12 | 2012-11-12 | Yunika Kk | Arbor driving type anchor |
-
1993
- 1993-05-20 JP JP14281393A patent/JPH0788660B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06330525A (en) | 1994-11-29 |
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