JP6739831B1 - Crimping grip with a threaded rod and a tension member including the same - Google Patents

Crimping grip with a threaded rod and a tension member including the same Download PDF

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JP6739831B1
JP6739831B1 JP2020027155A JP2020027155A JP6739831B1 JP 6739831 B1 JP6739831 B1 JP 6739831B1 JP 2020027155 A JP2020027155 A JP 2020027155A JP 2020027155 A JP2020027155 A JP 2020027155A JP 6739831 B1 JP6739831 B1 JP 6739831B1
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synthetic resin
resin coating
crimp
insert
sleeve
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JP2021130978A (en
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亮平 黒沢
亮平 黒沢
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Kurosawa Construction Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing

Abstract

【課題】ＰＣ鋼より線を使用して、従来のロックボルトと同様にナットによる緊張定着を可能とし、簡易な設備で緊張定着を可能とする。【解決手段】圧着グリップは、有底円筒状の圧着スリーブ４と、円筒状をして、内外周面に刃が形成してあり、圧着スリーブに挿入されるインサートとからなり、ネジ棒３は、圧着スリーブと中心軸線を共通にして、圧着スリーブの底部に一体に設けられ、ネジ棒の直径は圧着スリーブの外径よりも小さく、ナットによる定着を可能としてあり、底部の外周部がネジ棒側に向かうにつれて直径が小さくなるテーパー状に形成され、圧着スリーブは、中心軸線方向において、底部側にインサート格納部、及び、開口側に合成樹脂被覆取込部４ｂを形成し、合成樹脂被覆取込部が、中心軸線方向の全長にわたって、インサート格納部の径方向の厚さ寸法よりも小さい厚さ寸法を有するものとする。【選択図】図４PROBLEM TO BE SOLVED: To use a PC steel stranded wire to enable tension fixing with a nut similarly to a conventional lock bolt, and to perform tension fixing with simple equipment. SOLUTION: The crimp grip is composed of a crimp sleeve 4 having a bottomed cylindrical shape, and a cylindrical insert having an inner and outer peripheral surface formed with a blade and being inserted into the crimp sleeve. The crimp sleeve and the central axis are common, and are integrally provided on the bottom of the crimp sleeve, the diameter of the screw rod is smaller than the outer diameter of the crimp sleeve, and fixing is possible with a nut. The pressure-bonding sleeve is formed in a taper shape whose diameter becomes smaller toward the side, and the insert sleeve is formed on the bottom side and the synthetic resin coating intake portion 4b is formed on the opening side in the central axis direction. It is assumed that the insertion portion has a thickness dimension smaller than a radial thickness dimension of the insert storage portion over the entire length in the central axis direction. [Selection diagram] Fig. 4

Description

本発明は、ネジ棒付き圧着グリップ及びそれを備えた緊張材に関するものである。ネジ棒付き圧着グリップは、合成樹脂被覆を有するＰＣ鋼より線を圧着加工して一体化することによって、従来のロックボルトの代替品を構成し得るものである。このネジ棒付き圧着グリップとＰＣ鋼より線とを圧着した緊張材は、ロックボルトと同様に、ネジにナットを装着する緊張定着方法によって斜面等に緊張定着可能である。 The present invention relates to a crimp grip with a threaded rod and a tension member including the crimp grip. The crimp grip with a threaded rod can constitute a substitute for a conventional lock bolt by crimping and integrating a PC steel wire having a synthetic resin coating. The tension member obtained by crimping the crimp grip with the threaded rod and the PC steel wire can be tension-fixed on the slope or the like by the tension-fixing method of mounting the nut on the screw, similarly to the lock bolt.

ロックボルトは、斜面の安定化、掘削土留め工、掘削時の仮土留め工、また、トンネルの地山安定化などに使用されている。従来のロックボルトの一例としては特許文献１がある。特許文献１は、ロックボルトの中間部にピストン・シリンダからなるスライド機構を備えた可変長ロックボルトを提案している。この可変長ロックボルトは、地山の変位によって過大な応力がロックボルト本体に作用しないようにするため、地山の変位に対応してロックボルトの長さが変化可能に構成されている。 Rock bolts are used to stabilize slopes, excavate earth retaining works, temporary earth retaining works during excavation, and stabilize ground in tunnels. As an example of a conventional lock bolt, there is Patent Document 1. Patent Document 1 proposes a variable-length lock bolt provided with a slide mechanism including a piston and a cylinder in an intermediate portion of the lock bolt. This variable-length lock bolt is configured so that the length of the lock bolt can be changed in accordance with the displacement of the natural rock so that excessive stress does not act on the lock bolt main body due to the displacement of the natural rock.

また、特許文献２には、ロックボルトの長さが設置個所に対して十分でない場合に、中間カップリングナット等の接続具を用いて複数本のロックボルトを継ぎ足して必要長さとして使用することが開示されている。 Further, in Patent Document 2, when the length of the lock bolt is not sufficient for the installation location, a plurality of lock bolts are added using a connecting tool such as an intermediate coupling nut and used as a required length. Is disclosed.

一方、ＰＣ鋼より線を緊張材として使用する場合、特許文献３に示されるように、ＰＣ鋼より線の緊張定着には定着用のクサビ（雄コーン）をアンカーヘッドに形成された雌コーンに挿入固定する。この場合、緊張定着用のジャッキを駆動するための設備を必要とするため、ナットを締め付けて定着する方法に比較して手間がかかる。 On the other hand, when using a PC steel strand as a tension material, as shown in Patent Document 3, for fixing the tension of the PC steel strand, a fixing wedge (male cone) is attached to the female cone formed on the anchor head. Insert and fix. In this case, since a facility for driving the jack for fixing the tension is required, it takes more labor than the method of fixing the nut by tightening it.

一方で、グラウンドアンカーや橋梁の外ケーブルの緊張材としてＰＣ鋼より線はよく使われている。ＰＣ鋼より線としては、その防錆材としてＰＣ鋼より線の外周面に合成樹脂被覆が施された、いわゆるアンボンドＰＣ鋼より線が最も一般的である。 On the other hand, PC steel stranded wire is often used as a tension material for ground anchors and outer cables of bridges. As the stranded PC steel wire, the so-called unbonded PC stranded wire in which the outer peripheral surface of the PC steel stranded wire is coated with a synthetic resin as a rust preventive material is the most common.

ＰＣ鋼より線の端部を部材に定着する方式として、大別すると、クサビ方式と圧着グリップ方式との２種類がある。特許文献４は、合成樹脂被覆を有するアンボンドＰＣ鋼より線の定着方法を開示している。また、特許文献５も、アンボンドストランドに関する定着方法を開示している。 There are roughly two types of methods for fixing the end portion of the PC steel strand to the member, a wedge method and a crimp grip method. Patent Document 4 discloses a fixing method for an unbonded PC steel strand having a synthetic resin coating. Patent Document 5 also discloses a fixing method for unbonded strands.

特許第６１８１３４３号公報Japanese Patent No. 6181343 特開２００９−９７２６０号公報JP, 2009-97260, A 特開２００１−４９７９５号公報JP, 2001-49795, A 特許第３０７９２３１号公報Japanese Patent No. 3079231 特許第３５９０００号公報Japanese Patent No. 359000

ロックボルトを使用して斜面の安定化を図る場合、通常、あらかじめ土質を調査して滑り面よりも深い位置を定着部として定め、斜面表面から定着部までの必要長さを求めてロックボルトの長さを定めている。しかし、劣悪な土質の施工箇所に対しては中間にカップラー等接続具を使って長さを調整する必要があり、工事の遅延を招き、施工期間が延びてコストがかかるなどの好ましくない事態となる。 When using a lock bolt to stabilize a slope, the soil is usually investigated beforehand and a position deeper than the sliding surface is set as the fixing part, and the required length from the slope surface to the fixing part is calculated to determine the lock bolt's length. It defines the length. However, for construction sites with poor soil quality, it is necessary to adjust the length using a connecting device such as a coupler in the middle, which leads to a delay in construction and an unfavorable situation such as an increase in construction period and cost. Become.

また、合成樹脂被覆を有するアンボンドＰＣ鋼より線を緊張材として定着する方法においては、合成樹脂被覆が付いたまま定着することができないため、特許文献４に示すように、定着具の手前で合成樹脂被覆を剥がしてＰＣ鋼より線だけを定着具に挿入してくさびを用いて定着することになっている。また、特許文献５の図３も同じことを示している。しかしながら、定着終了後、定着具の仕口に再度防錆処理を施す必要があり、施工手間やコストがかかる問題がある。圧着グリップ定着に関する特許文献は発見できなかったが、この点については、くさび方式でも圧着グリップ方式でも同様である。 Further, in the method of fixing the unbonded PC steel wire having the synthetic resin coating as the tension material, since the fixing cannot be performed with the synthetic resin coating attached, as shown in Patent Document 4, it is synthesized before the fixing tool. It is supposed that the resin coating is peeled off and only the PC steel strand is inserted into the fixing tool and fixed by using a wedge. Further, FIG. 3 of Patent Document 5 shows the same thing. However, after the fixing is completed, it is necessary to perform the rust preventive treatment again on the joint of the fixing tool, which causes a problem that it takes time and cost for construction. No patent document relating to pressure-bonding grip fixing was found, but this point is the same for both the wedge method and the pressure-bonding grip method.

本発明は、従来のロックボルトに代えて、長さを自由に変更できる合成樹被覆付ＰＣ鋼より線を使用し、このＰＣ鋼より線をロックボルトと同様にナットによる緊張定着を可能とし、かつ、合成樹脂被覆をそのまま活かして防錆性能を損なうことなく、簡易な緊張機具で緊張定着することができる定着具及びその定着具を使用した緊張材を提供することを目的とする。 INDUSTRIAL APPLICABILITY The present invention uses a synthetic steel-covered PC steel wire whose length can be freely changed, in place of the conventional lock bolt, and enables the PC steel wire to be tension-fixed by a nut similarly to the lock bolt. Moreover, it is an object of the present invention to provide a fixing tool that can be tension-fixed with a simple tensioning device without deteriorating the rust preventive performance by utilizing the synthetic resin coating as it is, and a tensioning member using the fixing tool.

上記課題を解決する本願発明の第１の態様は、
合成樹脂被覆を有するＰＣ鋼より線の圧着加工用の圧着グリップと、ナット定着用のネジ棒とからなるネジ棒付き圧着グリップであって、
前記圧着グリップは、有底円筒状の圧着スリーブと、円筒状をして、内外周面に刃が形成してあり、前記圧着スリーブに挿入されるインサートとからなり、
前記ネジ棒は、前記圧着スリーブと中心軸線を共通にして、前記圧着スリーブの底部に一体に設けられ、前記ネジ棒の直径は圧着スリーブの外径よりも小さく、前記ナットによる定着を可能としてあり、
前記底部の外周部が前記ネジ棒側に向かうにつれて直径が小さくなるテーパー状に形成され、
前記圧着スリーブは、中心軸線方向において、前記底部側にインサート格納部、及び、開口側に合成樹脂被覆取込部を形成し、
前記合成樹脂被覆取込部が、中心軸線方向の全長にわたって、前記インサート格納部の径方向の厚さ寸法よりも小さい厚さ寸法を有することを特徴とするネジ棒付き圧着グリップである。 The first aspect of the present invention for solving the above-mentioned problems is
A crimp grip with a screw rod, comprising a crimp grip for crimping a PC steel wire having a synthetic resin coating, and a screw rod for fixing a nut,
The crimp grip comprises a bottomed cylindrical crimp sleeve, a cylindrical shape, and a blade formed on the inner and outer peripheral surfaces thereof, and an insert inserted into the crimp sleeve,
The screw rod is integrally provided on the bottom of the crimp sleeve with the central axis line common to the crimp sleeve, the diameter of the screw rod is smaller than the outer diameter of the crimp sleeve, and the fixing by the nut is possible. ,
The outer peripheral portion of the bottom portion is formed in a taper shape whose diameter decreases toward the screw rod side,
The crimp sleeve has an insert storage portion on the bottom side and a synthetic resin coating intake portion on the opening side in the central axis direction.
The crimp grip with a threaded rod, wherein the synthetic resin coating intake portion has a thickness dimension smaller than a radial thickness dimension of the insert storage portion over the entire length in the central axis direction.

また、第２の態様は、前記合成樹脂被覆取込部の外周部に、中心軸線方向において前記インサート格納部側から前記開口側に向かうにつれて径が小さくなるテーパーが形成してあることを特徴とする第１の態様のネジ棒付き圧着グリップである。 A second aspect is characterized in that a taper is formed on the outer peripheral portion of the synthetic resin coating intake portion, the diameter of which decreases in the central axis direction from the insert storage portion side toward the opening side. It is a crimp grip with a screw rod of the first aspect.

また、第３の態様は、前記合成樹脂被覆取込部の内径が前記インサート格納部の内径よりも大きいことを特徴とする第１の態様のネジ棒付き圧着グリップである。 A third aspect is the crimp grip with a threaded rod according to the first aspect, wherein an inner diameter of the synthetic resin coating intake portion is larger than an inner diameter of the insert storage portion.

また、第４の態様は、
合成樹脂被覆を有するＰＣ鋼より線と、
第１の態様から第３の態様のいずれかに記載のネジ棒付き圧着グリップと、を有し、
前記合成樹脂被覆を取り除いたＰＣ鋼より線の端部が前記インサートに挿入されると共に、前記合成樹脂被覆を有しているままのＰＣ鋼より線の中間部の一部が前記合成樹脂被覆取込部に挿入され、圧着加工して固定されていることを特徴とする緊張材である。 In addition, the fourth aspect,
PC steel stranded wire having a synthetic resin coating,
A crimp grip with a threaded rod according to any one of the first to third aspects,
The end of the PC steel wire from which the synthetic resin coating has been removed is inserted into the insert, and a part of the middle part of the PC steel wire having the synthetic resin coating is part of the synthetic resin coating. The tension member is characterized in that it is inserted into the insertion portion and is fixed by crimping.

（１）合成樹脂被覆を有するＰＣ鋼より線の被覆がついたままで圧着加工しても、圧着加工による被覆の破損が生じず、圧着スリーブと密着して止水性能が得られる。また、圧着グリップの仕口に防錆処理を施す必要がなくなり、施工の手間及びコストを減らすことができる。 (1) Even when pressure-bonding is performed with the PC steel stranded wire coating having a synthetic resin coating attached, the coating is not damaged by the pressure-bonding processing, and it is in close contact with the pressure-bonding sleeve to obtain water-stopping performance. Further, it is not necessary to apply rust-proof treatment to the joint of the pressure-bonding grip, and the labor and cost of construction can be reduced.

（２）ＰＣ鋼より線は巻き線で供給されるため、任意の長さに切断することが容易である。このため、工場において、施工現場に対応した所要長さにＰＣ鋼より線を切断し、ネジ棒付き圧着グリップとＰＣ鋼より線を圧着加工によって一体化した緊張材を任意長さで製作することができる。これにより、従来のように中間カップリング等の接続具を使用することなく、任意長さの緊張補強材を容易に得ることができる。 (2) Since the PC steel stranded wire is supplied as a winding wire, it is easy to cut it into an arbitrary length. Therefore, in the factory, cut the PC steel wire to the required length corresponding to the construction site, and manufacture a tension material with an arbitrary length by crimping the crimp grip with a screw rod and the PC steel wire. You can As a result, it is possible to easily obtain a tension reinforcing material of an arbitrary length without using a connecting tool such as an intermediate coupling as in the related art.

（３）安価なＰＣ鋼より線を用いて、従来のロックボルトと同様なナットの締め付けによる緊張定着方法で緊張定着することができるようになる。これにより、緊張定着具の製造コストが低廉となり、施工も簡単でコスト削減することができる。 (3) It becomes possible to perform tension fixing using an inexpensive PC stranded wire by a tension fixing method by tightening a nut similar to the conventional lock bolt. As a result, the manufacturing cost of the tension fixing device becomes low, the construction is easy, and the cost can be reduced.

本発明の第１実施形態のネジ棒付き圧着グリップと合成樹脂被覆を有するＰＣ鋼より線を示す。図１（ａ）は第１実施形態に係るネジ棒付き圧着グリップの断面図とインサートの平面図、図１（ｂ）は第１実施形態に係るネジ棒付き圧着グリップの平面図、図１（ｃ）は第１実施形態に係る緊張材の端部の断面図、図１（ｄ）は第１実施形態に係る緊張材の合成樹脂被覆を有するＰＣ鋼より線の断面図、図１（ｅ）は第１実施形態に係る緊張材の端部の平面図である。1 shows a PC steel strand having a crimp grip with a threaded rod and a synthetic resin coating according to the first embodiment of the present invention. 1A is a cross-sectional view of a crimp grip with a screw rod according to the first embodiment and a plan view of an insert, and FIG. 1B is a plan view of a crimp grip with a screw rod according to the first embodiment, FIG. 1C is a cross-sectional view of an end portion of the tendon material according to the first embodiment, FIG. 1D is a cross-sectional view of a PC steel strand having a synthetic resin coating of the tendon material according to the first embodiment, FIG. 4] is a plan view of an end portion of the tension member according to the first embodiment. 本発明の第２実施形態のネジ棒付き圧着グリップと合成樹脂被覆を有するＰＣ鋼より線を示す。図２（ａ）は第２実施形態に係るネジ棒付き圧着グリップの断面図とインサートの平面図、図２（ｂ）は第２実施形態に係るネジ棒付き圧着グリップの平面図、図２（ｃ）は第２実施形態に係る緊張材の端部の断面図、図２（ｄ）は第２実施形態に係る緊張材の合成樹脂被覆を有するＰＣ鋼より線の断面図、図２（ｅ）は第１実施形態に係る緊張材の端部の平面図である。7 shows a PC steel strand having a crimp grip with a threaded rod and a synthetic resin coating according to a second embodiment of the present invention. 2A is a sectional view of a crimp grip with a screw rod according to the second embodiment and a plan view of an insert, and FIG. 2B is a plan view of a crimp grip with a screw rod according to the second embodiment, FIG. 2C is a cross-sectional view of the end portion of the tendon material according to the second embodiment, FIG. 2D is a cross-sectional view of a PC steel strand having a synthetic resin coating of the tendon material according to the second embodiment, FIG. 4] is a plan view of an end portion of the tension member according to the first embodiment. 合成樹脂被覆を有するＰＣ鋼より線の断面図である。図３（ａ）は合成樹脂被覆を有するＰＣ鋼より線の断面、図３（ｂ）はＰＣ鋼より線（裸線）の断面、図３（ｃ）は２重防錆樹脂層を有するＰＣ鋼より線の断面、図３（ｄ）は全素線塗装型ＰＣ鋼より線の断面を示す。It is sectional drawing of the PC steel strand which has a synthetic resin coating. 3(a) is a cross section of a PC steel stranded wire having a synthetic resin coating, FIG. 3(b) is a cross section of a PC steel stranded wire (bare wire), and FIG. 3(c) is a PC having a double anticorrosive resin layer. A cross section of a steel stranded wire, and FIG. 3D shows a cross section of an all strand coated PC steel stranded wire. 圧着加工後のネジ棒付き圧着グリップの比較イメージ図である。図４（ａ）は本願の実施形態に係る緊張材の端部の断面図、図４（ｂ）は本願の実施形態に係る緊張材の端部の平面図、図４（ｃ）は本願出願人の先願に係る緊張材の圧着前の端部の断面図、図４（ｄ）は本願出願人の先願に係る緊張材の圧着後の端部の断面図である。It is a comparison image figure of the crimp grip with a screw rod after crimping processing. 4A is a cross-sectional view of an end portion of the tendon material according to the embodiment of the present application, FIG. 4B is a plan view of the end portion of the tendon material according to the embodiment of the present application, and FIG. FIG. 4D is a sectional view of the end portion of the applicant's earlier application before crimping, and FIG. 4D is a sectional view of the end portion of the applicant's earlier application after crimping. 本願の実施形態に係る緊張材の端部を支圧板にナットで固定した状態を示す平面図である。It is a top view showing the state where an end of a tension material concerning an embodiment of this application was fixed to a bearing plate with a nut. 本願の実施形態に係る緊張材を法面アンカーとして斜面安定に適用した例を示す図である。図６（ａ）は緊張材の設置図、図６（ｂ）は緊張材の定着部の拡大図である。It is a figure which shows the example which applied the tension|tensile_strength material which concerns on embodiment of this application to a slope stable as a slope anchor. FIG. 6A is an installation view of the tension material, and FIG. 6B is an enlarged view of the fixing portion of the tension material. 本願の実施形態に係る緊張材を橋桁のプレストレス導入用の外ケーブルとした応用例を示す図である。図７（ａ）は定着部の拡大図、図７（ｂ）は側面図である。It is a figure which shows the application example which used the tension|tensile_strength material which concerns on embodiment of this application as the outer cable for prestress introduction of a bridge girder. 7A is an enlarged view of the fixing unit, and FIG. 7B is a side view.

（第１実施形態）
図１に本願の第１実施形態に係る止水性能を備えたネジ棒付き圧着グリップ１を示す。本第１実施形態のネジ棒付き圧着グリップ１は、合成樹脂被覆を有するＰＣ鋼より線（アンボンドＰＣ鋼より線ともいう）６の圧着加工用の圧着グリップ２とナット定着用のネジ棒３とからなる。 (First embodiment)
FIG. 1 shows a pressure-bonding grip 1 with a threaded rod having water-stopping performance according to the first embodiment of the present application. A crimp grip 1 with a screw rod according to the first embodiment includes a crimp grip 2 for crimping a PC steel stranded wire (also referred to as an unbonded PC steel stranded wire) 6 having a synthetic resin coating, and a screw rod 3 for fixing a nut. Consists of.

圧着グリップ２は、有底円筒状の圧着スリーブ４と、圧着スリーブ４の中空部に挿入されるインサート５とからなる。圧着スリーブ４は、ネジ棒３側にテーパー状の外周部を備えた底部４ａを有している。 The crimp grip 2 comprises a cylindrical crimp sleeve 4 having a bottom, and an insert 5 inserted into the hollow portion of the crimp sleeve 4. The crimping sleeve 4 has a bottom portion 4a having a tapered outer peripheral portion on the screw rod 3 side.

ネジ棒３は所要の長さの円柱状をして、圧着スリーブ４と中心軸線を共通にし、圧着スリーブ４の底部４ａと一体に形成されている。底部４ａの外周には、ネジ棒３側に向かうにつれて直径が小さくなるテーパーが形成されている。ネジ棒３の直径は、圧着スリーブ４の外径よりも小さく、後述するナット８による定着を可能としてある。底部４ａの外周部をネジ棒３側に向かうにつれて直径が小さくなるテーパー状に形成することによって、小さい直径で形成されるネジ棒３から大きな外径を有する圧着グリップ２への定着力が、応力集中を生じさせず、スムーズに伝達されることになる。 The screw rod 3 has a cylindrical shape having a required length, has a common central axis with the crimp sleeve 4, and is integrally formed with the bottom portion 4 a of the crimp sleeve 4. A taper is formed on the outer periphery of the bottom portion 4a, the diameter of which decreases toward the screw rod 3 side. The diameter of the screw rod 3 is smaller than the outer diameter of the pressure-bonding sleeve 4, and fixing by a nut 8 described later is possible. By forming the outer peripheral portion of the bottom portion 4a in a taper shape in which the diameter becomes smaller toward the screw rod 3 side, the fixing force from the screw rod 3 formed with a small diameter to the crimp grip 2 having a large outer diameter is stressed. It will be transmitted smoothly without causing concentration.

圧着スリーブ４は、底部４ａとは反対側の端部に、インサート５と合成樹脂被覆６ａを有するＰＣ鋼より線６の端部を挿入する開口を形成している。圧着スリーブ４は、中心軸線方向において、開口側に合成樹脂被覆取込部４ｂ、底部４ａ側にインサート格納部４ｃを形成している。 The crimping sleeve 4 has an opening at the end opposite to the bottom 4a for inserting the end of the PC steel strand 6 having the insert 5 and the synthetic resin coating 6a. The crimp sleeve 4 has a synthetic resin coating intake portion 4b on the opening side and an insert storage portion 4c on the bottom portion 4a side in the central axis direction.

インサート５は、所要の長さで形成された円筒状をしている。インサート５は、合成樹脂被覆６ａを取り除いたＰＣ鋼より線６ｂ（通常の裸線）の端部が挿入される側の端部から、インサート５の中心軸線方向に延びる一対のスリット部５ａを有している。一対のスリット部５ａは、インサート５の中心軸線方向においてインサート５の略中央まで延びている。一対のスリット部５ａは、互いにインサート５の径方向に対向する位置に形成されている。インサート５の内外周面には、環状に突出した滑り止め用の刃が、インサート５の中心軸線方向に等間隔に複数形成された凹凸面としてある。 The insert 5 has a cylindrical shape having a required length. The insert 5 has a pair of slit portions 5a extending in the central axis direction of the insert 5 from the end portion on the side where the end portion of the PC steel wire 6b (normal bare wire) from which the synthetic resin coating 6a is removed is inserted. doing. The pair of slit portions 5a extends to approximately the center of the insert 5 in the central axis direction of the insert 5. The pair of slit portions 5a are formed at positions facing each other in the radial direction of the insert 5. On the inner and outer peripheral surfaces of the insert 5, a plurality of non-slip blades protruding in an annular shape are formed as uneven surfaces at equal intervals in the central axis direction of the insert 5.

インサート５の中心軸線方向において、インサート格納部４ｃは、インサート５と略同じ長さである。合成樹脂被覆取込部４ｂは、インサート５の中心軸線方向において、所定の長さにわたって形成する。 The insert storage portion 4c has substantially the same length as the insert 5 in the central axis direction of the insert 5. The synthetic resin coating intake portion 4b is formed over a predetermined length in the central axis direction of the insert 5.

本第１実施形態においては、合成樹脂被覆取込部４ｂの内径Ｒ１はインサート格納部４ｃの内径Ｒ２と同径であり、合成樹脂被覆取込部４ｂの外周に、開口側（ネジ棒３とは反対側）に向かうにつれて外径が小さくなるテーパー４ｂ１が全長にわたって形成されている。 In the first embodiment, the inner diameter R1 of the synthetic resin coating intake portion 4b is the same as the inner diameter R2 of the insert storage portion 4c, and the opening side (screw rod 3 and The taper 4b1 is formed over the entire length, the outer diameter of which decreases toward the opposite side).

圧着スリーブ４の底部４ａとインサート格納部４ｃの間には、インサート５の外径よりも小さい内径Ｒ３を有する座繰り部４ｄが形成され、インサート格納部４ｃと座繰り部４ｄとの境界に段差を形成している。 A counterbore 4d having an inner diameter R3 smaller than the outer diameter of the insert 5 is formed between the bottom 4a of the crimp sleeve 4 and the insert storage 4c, and a step is formed at the boundary between the insert storage 4c and the counterbore 4d. Is formed.

圧着スリーブ４が不図示のダイスを通して圧着加工されると、インサート格納部４ｃが所定の内径まで細く変形して、内側のインサート５が、合成樹脂被覆６ａを取り除いたＰＣ鋼より線６ｂ（裸線）の端部の表面を噛み込み、圧着スリーブ４とＰＣ鋼より線６ｂ（裸線）が強固に結合される。上記のように、合成樹脂被覆取込部４ｂの外周部にテーパー４ｂ１を形成することにより、ダイスを通して圧着加工される際に、インサート格納部４ｃが受ける圧着力よりも合成樹脂被覆取込部４ｂが受ける圧着力の方が一段小さくなり、結果として、圧着スリーブ４が圧着加工された後に、合成樹脂被覆取込部４ｂ内の合成樹脂被覆６ａを、破損することなく、圧着スリーブ４に密着する程度に適度に変形させ、圧着スリーブ４の開口端部とＰＣ鋼より線６の間の止水が可能な状態となる。テーパー４ｂ１の角度は合成樹脂被覆６ａの外形と厚さに応じて定めることができる。 When the crimping sleeve 4 is crimped through a die (not shown), the insert storage part 4c is thinly deformed to a predetermined inner diameter, and the inner insert 5 is made of PC steel stranded wire 6b (bare wire) without the synthetic resin coating 6a. 2) bites the surface of the end portion, and the crimping sleeve 4 and the PC steel wire 6b (bare wire) are firmly connected. As described above, by forming the taper 4b1 on the outer peripheral portion of the synthetic resin coating intake portion 4b, the synthetic resin coating intake portion 4b has a force larger than the pressure applied to the insert storage portion 4c when pressure-bonded through the die. The crimping force received by is further reduced, and as a result, after the crimping sleeve 4 is crimped, the synthetic resin coating 6a in the synthetic resin coating intake portion 4b is adhered to the crimping sleeve 4 without being damaged. It is appropriately deformed to a certain degree so that water can be stopped between the opening end of the crimping sleeve 4 and the PC steel wire 6. The angle of the taper 4b1 can be determined according to the outer shape and thickness of the synthetic resin coating 6a.

また、上述のように、ネジ棒３の直径は圧着スリーブ４の外径よりも小さく、底部４ａの外周部にテーパーを形成していることにより、ネジ棒３が圧着スリーブ４と一体に形成されていてもネジ棒３表面のネジ山に影響を与えることなく、ＰＣ鋼より線６を圧着スリーブ４の中空部に挿入した状態で、ダイスを通過させて圧着スリーブ４にＰＣ鋼より線６を圧着して一体化することができる。 Further, as described above, the diameter of the threaded rod 3 is smaller than the outer diameter of the crimp sleeve 4, and the taper is formed on the outer peripheral portion of the bottom portion 4a, so that the threaded rod 3 is formed integrally with the crimp sleeve 4. Even if the PC steel stranded wire 6 is inserted into the hollow portion of the crimping sleeve 4 without affecting the screw thread on the surface of the threaded rod 3, the die is passed through and the PC steel stranded wire 6 is attached to the crimping sleeve 4. It can be crimped and integrated.

圧着スリーブ４の座繰り部４ｄは、インサート格納部４ｃの内径Ｒ２及びインサート５の外径よりも小さく、合成樹脂被覆６ａを取り除いたＰＣ鋼より線６の端部の直径Ｒ４よりも僅かに大きい内径Ｒ３を有している。このため、合成樹脂被覆６ａを取り除いたＰＣ鋼より線６の端部は、図１（ｃ）に示すように、インサート５を貫通して、この座繰り部４ｄの内側まで延び、ＰＣ鋼より線６の先端がインサート５を通過して外まで延びた余長部となる。これにより、インサート５の内周面の全ての刃がＰＣ鋼より線６の端部に確実に食い込んで強固に圧着し、ＰＣ鋼より線６と圧着グリップ２が一体化される。また、インサート５を圧着スリーブ４に挿入する際、座繰り部４ｄに停止するまでインサート５を挿入することで、インサート５を容易に適切な位置に配置することができる。座繰り部４ｄの深さは５ｍｍから１５ｍｍが適切であるが、工事現場で切断加工する場合などでは、切断機械によって誤差が大きくなる場合があるため、状況に応じてこれより深くしてもよい。 The counterbore 4d of the crimp sleeve 4 is smaller than the inner diameter R2 of the insert housing 4c and the outer diameter of the insert 5, and is slightly larger than the diameter R4 of the end of the PC steel wire 6 from which the synthetic resin coating 6a is removed. It has an inner diameter R3. Therefore, the end portion of the PC steel wire 6 from which the synthetic resin coating 6a has been removed penetrates the insert 5 and extends to the inside of the countersunk portion 4d as shown in FIG. The tip of the wire 6 becomes an extra length portion that extends to the outside through the insert 5. As a result, all the blades on the inner peripheral surface of the insert 5 surely bite into the ends of the PC steel wire 6 and firmly crimp them, and the PC steel wire 6 and the crimp grip 2 are integrated. Moreover, when inserting the insert 5 into the crimping sleeve 4, the insert 5 can be easily arranged at an appropriate position by inserting the insert 5 until it stops at the counterbore 4d. The depth of the countersunk portion 4d is appropriately 5 mm to 15 mm, but when cutting at the construction site, the error may increase depending on the cutting machine, so it may be deeper than this depending on the situation. ..

（第２実施形態）
図２は、本願の第２実施形態に係るネジ棒付き圧着グリップ１を示す図である。第２実施形態は第１実施形態と多くの点で共通するため、第１実施形態と共通する説明は省略する。 (Second embodiment)
FIG. 2 is a diagram showing a crimp grip 1 with a screw rod according to a second embodiment of the present application. Since the second embodiment has many points in common with the first embodiment, description common to the first embodiment will be omitted.

本第２実施形態においては、合成樹脂被覆取込部４ｂの外周部にテーパー４ｂ１を形成せず、合成樹脂被覆取込部４ｂの内径Ｒ１をインサート格納部４ｃの内径Ｒ２よりも大きく形成する。内径Ｒ１、Ｒ２の具体的な大きさは、取り込む合成樹脂被覆６ａの外径と厚さに応じて適切に定める。合成樹脂被覆取込部４ｂの内径Ｒ１は、圧着加工前に合成樹脂被覆６ａを挿入可能である。前記の第１実施形態と同様な原理で、ダイスを通して圧着加工される際に、インサート格納部４ｃが受ける圧着力よりも合成樹脂被覆取込部４ｂが受ける圧着力の方が一段小さくなり、圧着加工後に、合成樹脂被覆６ａが圧着スリーブ４と密着し、かつ合成樹脂被覆６ａが損傷することがない寸法に定めることができる。 In the second embodiment, the taper 4b1 is not formed on the outer peripheral portion of the synthetic resin coating intake portion 4b, and the inner diameter R1 of the synthetic resin coating intake portion 4b is formed larger than the inner diameter R2 of the insert storage portion 4c. Specific sizes of the inner diameters R1 and R2 are appropriately determined according to the outer diameter and the thickness of the synthetic resin coating 6a to be incorporated. The synthetic resin coating 6a can be inserted into the inner diameter R1 of the synthetic resin coating intake portion 4b before the crimping process. According to the same principle as the first embodiment described above, when crimping is performed through a die, the crimping force received by the synthetic resin coating intake portion 4b is smaller than the crimping force received by the insert storage portion 4c. After processing, the size of the synthetic resin coating 6a can be determined so that the synthetic resin coating 6a comes into close contact with the crimp sleeve 4 and the synthetic resin coating 6a is not damaged.

このように形成することによって、圧着スリーブ４がダイスを通して圧着加工された後に、インサート５がＰＣ鋼より線６ｂに強固に定着されると共に、内径Ｒ１の大きい合成樹脂被覆取込部４ｂにより、合成樹脂被覆６ａを有するＰＣ鋼より線６の合成樹脂被覆６ａが圧着スリーブ４に密着される程度で適度に変形して、圧着スリーブ４の開口端部と合成樹脂被覆６ａを有するＰＣ鋼より線６の間の止水が可能な状態となる。これにより、本第２実施形態によれば、第１実施形態と同様な効果が得られる。第１実施形態と第２実施形態により、合成樹脂被覆取込部４ｂが、中心軸線方向の全長にわたって、インサート格納部４ｃの径方向の厚さ寸法よりも小さい厚さ寸法を有すれば良いことが分かる。 By forming in this way, after the crimping sleeve 4 is crimped through the die, the insert 5 is firmly fixed to the PC steel wire 6b, and the synthetic resin coating take-in portion 4b having a large inner diameter R1 is used for synthesizing. The synthetic resin coating 6a of the PC steel stranded wire 6 having the resin coating 6a is appropriately deformed to such an extent that the synthetic resin coating 6a is in close contact with the crimping sleeve 4, and the open end of the crimping sleeve 4 and the PC steel stranded wire 6 having the synthetic resin coating 6a. The water can be stopped during this period. As a result, according to the second embodiment, the same effect as that of the first embodiment can be obtained. According to the first embodiment and the second embodiment, it is sufficient that the synthetic resin coating intake portion 4b has a thickness dimension smaller than the radial thickness dimension of the insert storage portion 4c over the entire length in the central axis direction. I understand.

図３は、合成樹脂被覆６ａを有するＰＣ鋼より線６の断面図である。図３（ａ）に示す合成樹脂被覆６ａを有するＰＣ鋼より線６は、図３（ｂ）に示す７本の素線を有する７本よりＰＣ鋼より線６ｂ（裸線）の外周に、例えば、ポリエンチレン合成樹脂被覆（ＰＥ被覆）６ａを施している。ＰＣ鋼より線６ｂと合成樹脂被覆６ａとの隙間には、充填材としてグリースまたはワックスが充填される。このような合成樹脂被覆６ａを有するＰＣ鋼より線６はアンボンドＰＣ鋼より線とも呼ばれる。このように形成されたアンボンドＰＣ鋼より線は、防錆処理されているため、橋梁の外ケーブルや地盤アンカー等の厳しい腐食環境に使われている。 FIG. 3 is a cross-sectional view of a PC steel strand 6 having a synthetic resin coating 6a. The PC steel stranded wire 6 having the synthetic resin coating 6a shown in FIG. 3(a) has seven strands shown in FIG. 3(b) on the outer periphery of the PC steel stranded wire 6b (bare wire). For example, polyethylene synthetic resin coating (PE coating) 6a is applied. Grease or wax is filled as a filler in the gap between the PC steel strand 6b and the synthetic resin coating 6a. The PC stranded wire 6 having such a synthetic resin coating 6a is also called an unbonded PC stranded wire. Since the unbonded PC stranded wire thus formed is rustproofed, it is used in severe corrosive environments such as outer cables of bridges and ground anchors.

図３（ｃ）に示す合成樹脂被覆６ａを有するＰＣ鋼より線６は２重防錆樹脂層を有するものである。つまり、図３（ｄ）に示すように、７本よりのＰＣ鋼より線６ｂの素線（６本の側線と１本の心線）にそれぞれ樹脂被膜が塗布されて形成された全素線塗装型ＰＣ鋼より線６ｂの外周に、更にＰＥ被覆６ａを施している。このようなＰＣ鋼より線６は防錆性能と超耐久性を有するため、最も厳しい腐食環境において使用される。本実施形態の合成樹脂被覆６ａを有するＰＣ鋼より線６としては、図３（ｃ）に示すものが好ましい。 The PC steel strand 6 having the synthetic resin coating 6a shown in FIG. 3(c) has a double rustproof resin layer. That is, as shown in FIG. 3D, all strands formed by applying resin coatings to the strands (six side lines and one core wire) of seven or more PC steel strands 6b PE coating 6a is further applied to the outer periphery of the coated PC steel twisted wire 6b. Since such PC steel stranded wire 6 has rust prevention performance and super durability, it is used in the most severe corrosive environment. As the PC steel strand 6 having the synthetic resin coating 6a of the present embodiment, the one shown in FIG. 3C is preferable.

図４は圧着加工後のネジ棒付き圧着グリップ１の比較イメージ図である。図４（ａ）は本願の実施形態に係る緊張材７の端部の断面、図４（ｂ）は本願の実施形態に係る緊張材７の端部の平面、図４（ｃ）は本願出願人の先願（特願２０１９−１６１８６５）に係る緊張材７の圧着前の端部の断面、図４（ｄ）は本願出願人の先願に係る緊張材７の圧着後の端部の断面を示す。図４（ｃ）に示すように、本願出願人の先願発明では、圧着グリップ２を用いて合成樹脂被覆６ａを有するＰＣ鋼より線６を定着する場合、合成樹脂被覆６ａを有するＰＣ鋼より線６の端部の合成樹脂被覆６ａを切除した部分の一部が、圧着スリーブ４の外に配置されるため、この部分を防錆処理する必要がある。このことは、くさびを用いてＰＣ鋼より線６ｂを定着する場合も同様である。 FIG. 4 is a comparative image view of the crimp grip 1 with a screw rod after crimping. 4A is a cross section of an end portion of the tension member 7 according to the embodiment of the present application, FIG. 4B is a plane view of the end portion of the tension member 7 according to the embodiment of the present application, and FIG. Cross section of the end portion of the tension member 7 according to the prior application of the person (Japanese Patent Application No. 2019-161865) before crimping, and FIG. 4D is a cross section of the end portion of the tension member 7 according to the applicant's previous application after the crimping. Indicates. As shown in FIG. 4(c), in the prior application of the applicant of the present application, when fixing the PC steel strand 6 having the synthetic resin coating 6a by using the pressure-bonding grip 2, the PC steel having the synthetic resin coating 6a is used. Since a part of the end of the wire 6 where the synthetic resin coating 6a is cut off is arranged outside the crimping sleeve 4, this part needs to be rustproofed. This is the same when fixing the PC steel strand 6b using a wedge.

それに対して、本実施形態によれば、図４（ａ）に示すイメージ図のように、圧着スリーブ４の開口側の端部に本願の合成樹脂被覆取込部４ｂを設けることによって、圧着加工後、仕口において合成樹脂被覆６ａが圧着スリーブ４に密着して、かつ、合成樹脂被覆６ａが破損せず、圧着スリーブ４の開口側端部とＰＣ鋼より線６の間で止水が可能な状態になる。 On the other hand, according to the present embodiment, as shown in the image diagram of FIG. 4A, after the crimping process, the synthetic resin coating intake portion 4b of the present application is provided at the opening-side end of the crimping sleeve 4. In the joint, the synthetic resin coating 6a is in close contact with the crimping sleeve 4, the synthetic resin coating 6a is not damaged, and water can be stopped between the opening side end of the crimping sleeve 4 and the PC steel wire 6. It becomes a state.

図５は、第１実施形態又は第２実施形態に係るネジ棒付き圧着グリップ１と合成樹脂被覆６ａを有するＰＣ鋼より線６とを圧着加工により一体化させた緊張材７と、ネジ棒付き圧着グリップ１のネジ棒３に取り付けたナット８と、アンカープレート９を示している。ナット８とアンカープレート９は定着具としての役割を果たす。 FIG. 5 shows a tension member 7 in which a crimp grip 1 with a screw rod according to the first embodiment or the second embodiment and a PC steel stranded wire 6 having a synthetic resin coating 6a are integrated by crimping, and a screw rod. The nut 8 attached to the screw rod 3 of the crimp grip 1 and the anchor plate 9 are shown. The nut 8 and the anchor plate 9 serve as a fixing tool.

図６は、図５に示す緊張材７を、斜面安定用の法面アンカーに使用した例を示す。図６に示すように、アンカー頭部は、ロックボルトと同じようにナット８による定着が可能である。斜面安定・地滑り防止のために設置されるロックボルトの定着部は、斜面の滑り面Ｓよりも深い位置に設置する必要があり、その深さは同一施工現場であっても場所によって異なることがあり、施工箇所に応じて長さの異なるロックボルトを準備するのは費用がかかる。これに対して、本実施形態によれば、アンカー自由長部とアンカー定着部を、ロックボルトよりも自由な長さで配置することができ、費用を抑えることができる。 FIG. 6 shows an example in which the tendon 7 shown in FIG. 5 is used as a slope anchor for stabilizing slopes. As shown in FIG. 6, the anchor head can be fixed by the nut 8 similarly to the lock bolt. The fixing portion of the lock bolt installed for slope stability and landslide prevention needs to be installed deeper than the slide surface S of the slope, and the depth may vary depending on the location even at the same construction site. Yes, it is expensive to prepare lock bolts of different lengths depending on the construction site. On the other hand, according to the present embodiment, the anchor free length portion and the anchor fixing portion can be arranged with a length longer than that of the lock bolt, and the cost can be suppressed.

図７は、図５に示す緊張材７を、橋桁１０の補強材として外ケーブル形式で使用する実施形態を示す図である。合成樹脂被覆６ａを有するＰＣ鋼より線６を簡単なナット定着方法で緊張定着して構造物にプレストレスを付与することが可能である。なお、プレストレス導入のための外ケーブルとする場合は、ＰＣ鋼より線６の一方の端部だけ本願のネジ棒付き圧着グリップ１を圧着固定し、他方の端部はクサビ定着としてもよい。 FIG. 7 is a view showing an embodiment in which the tension member 7 shown in FIG. 5 is used as a reinforcing member for the bridge girder 10 in an outer cable form. It is possible to tension-fix the PC steel stranded wire 6 having the synthetic resin coating 6a by a simple nut fixing method to apply prestress to the structure. When the outer cable is used for introducing the prestress, the crimp grip 1 with the threaded rod of the present invention may be crimped and fixed to only one end of the PC steel stranded wire 6, and the other end may be wedge-fixed.

１ ネジ棒付き圧着グリップ
２ 圧着グリップ
３ ネジ棒
４ 圧着スリーブ
４ａ 底部
４ｂ 合成樹脂被覆取込部
４ｂ１ テーパー
４ｃ インサート格納部
４ｄ 座繰り部
５ インサート
５ａ スリット部
６ 合成樹脂被覆を有するＰＣ鋼より線
６ａ 合成樹脂被覆
６ｂ ＰＣ鋼より線
７ 緊張材
８ ナット
９ アンカープレート
１０ 橋桁
Ｒ１ 合成樹脂被覆取込部の内径
Ｒ２ インサート格納部の内径
Ｒ３ 座繰り部の内径
Ｒ４ ＰＣ鋼より線の直径
Ｓ 斜面の滑り面 1 Crimping Grip with Screw Rod 2 Crimping Grip 3 Screw Rod 4 Crimping Sleeve 4a Bottom 4b Synthetic Resin Coating Intake 4b1 Taper 4c Insert Storage 4d Counterbore 5 Insert 5a Slit 6 PC Steel Strand 6a with Synthetic Resin Coating Synthetic resin coating 6b PC stranded wire 7 Tension material 8 Nut 9 Anchor plate 10 Bridge girder R1 Synthetic resin coating Internal diameter of intake part R2 Internal diameter of insert storage part
R3 Counterbore inner diameter R4 PC steel strand diameter S Slope sliding surface

Claims (4)

合成樹脂被覆を有するＰＣ鋼より線の圧着加工用の圧着グリップと、ナット定着用のネジ棒とからなるネジ棒付き圧着グリップであって、
前記圧着グリップは、有底円筒状の圧着スリーブと、円筒状をして、内外周面に刃が形成してあり、前記圧着スリーブに挿入されるインサートとからなり、
前記ネジ棒は、前記圧着スリーブと中心軸線を共通にして、前記圧着スリーブの底部に一体に設けられ、前記ネジ棒の直径は圧着スリーブの外径よりも小さく、前記ナットによる定着を可能としてあり、
前記底部の外周部が前記ネジ棒側に向かうにつれて直径が小さくなるテーパー状に形成され、
前記圧着スリーブは、中心軸線方向において、前記底部側にインサート格納部、及び、開口側に合成樹脂被覆取込部を形成し、
前記合成樹脂被覆取込部が、中心軸線方向の全長にわたって、前記インサート格納部の径方向の厚さ寸法よりも小さい厚さ寸法を有することを特徴とするネジ棒付き圧着グリップ。 A crimp grip with a screw rod, comprising a crimp grip for crimping a PC steel wire having a synthetic resin coating, and a screw rod for fixing a nut,
The crimp grip comprises a bottomed cylindrical crimp sleeve, a cylindrical shape, and a blade formed on the inner and outer peripheral surfaces thereof, and an insert inserted into the crimp sleeve,
The screw rod is integrally provided on the bottom of the crimp sleeve with the central axis line common to the crimp sleeve, the diameter of the screw rod is smaller than the outer diameter of the crimp sleeve, and the fixing by the nut is possible. ,
The outer peripheral portion of the bottom portion is formed in a taper shape whose diameter decreases toward the screw rod side,
The crimp sleeve has an insert storage portion on the bottom side and a synthetic resin coating intake portion on the opening side in the central axis direction.
The crimp grip with a threaded rod, wherein the synthetic resin coating intake portion has a thickness dimension smaller than a radial thickness dimension of the insert storage portion over the entire length in the central axis direction. 前記合成樹脂被覆取込部の外周部に、中心軸線方向において前記インサート格納部側から前記開口側に向かうにつれて径が小さくなるテーパーが形成してあることを特徴とする請求項１に記載のネジ棒付き圧着グリップ。 The screw according to claim 1, wherein a taper is formed on an outer peripheral portion of the synthetic resin coating intake portion such that a diameter thereof decreases in a central axis direction from the insert storage portion side toward the opening side. Crimped grip with a rod. 前記合成樹脂被覆取込部の内径が前記インサート格納部の内径よりも大きいことを特徴とする請求項１に記載のネジ棒付き圧着グリップ。 The crimp grip with a threaded rod according to claim 1, wherein an inner diameter of the synthetic resin coating intake portion is larger than an inner diameter of the insert storage portion. 合成樹脂被覆を有するＰＣ鋼より線と、
請求項１乃至３のいずれかに記載のネジ棒付き圧着グリップと、を有し、
前記合成樹脂被覆を取り除いたＰＣ鋼より線の端部が前記インサートに挿入されると共に、前記合成樹脂被覆を有しているままのＰＣ鋼より線の中間部の一部が前記合成樹脂被覆取込部に挿入され、圧着加工して固定されていることを特徴とする緊張材。 PC steel stranded wire having a synthetic resin coating,
A crimp grip with a threaded rod according to any one of claims 1 to 3,
The end of the PC steel wire from which the synthetic resin coating has been removed is inserted into the insert, and a part of the middle part of the PC steel wire having the synthetic resin coating is part of the synthetic resin coating. Tension material characterized by being inserted into the insertion part and fixed by crimping.
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