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1. 发明专利

JPH07139173A TENSION GRIP FOR HOLLOW PC STEEL BAR 失效
公开(公告)号：JPH07139173A
公开(公告)日：1995-05-30
申请号：JP30708793
申请日：1993-11-15
申请人： ORIENTAL CONSTR CO LTD , HIGH FREQUENCY HEATTREAT
发明人： YOKOTA TSUTOMU , TEZUKA MASAMICHI , IMAI AKIFUMI
IPC分类号： E04C5/12 , E04G21/12
摘要： PURPOSE:To give prestress to a hollow PC steel bar through a pre-tension system by a small-sized tension grip having a simple structure. CONSTITUTION:A bearing base 3 having a hollow PC steel-bar inserting groove 2 is fixed at one end section of a support base 1, a jack cradle bearing the cylinder of a jack for pushing-in is fastened at the other end section of the support base 1, and a bearing base having a hollow PC steel-bar inserting groove 7 is settled to the intermediate section of the support base 1. A bearing pressure board 10 engaged with the bearing base 3 and a stopper 12 engaged at one end section of a PC steel bar 11 inserted into a hollow PC steel bar 9 are fixed detachably at one end section of the hollow PC steel bar 9. A bearing cylinder 15 having a female screw at one end section is screwed to a male screw on the outside of the other end section of the hollow PC steel bar 9, and a pushing engaging piece 16 fitted at the other end section of the PC steel bar 11 is arranged into the intermediate section of the bearing cylinder 15. An annular engaging piece 17 is screwed at the other end section of the bearing cylinder 15, and a pushing member 19 pushed by a piston lever 18 for the jack 4 for pushing-in is inserted to the annular engaging piece 17.

2. 发明专利

JPH1113211A PC STEEL ROD UNIT HAVING SAFETY MEANS IN RUPTURE 失效
公开(公告)号：JPH1113211A
公开(公告)日：1999-01-19
申请号：JP17207397
申请日：1997-06-27
申请人： ORIENTAL CONSTR CO LTD , HIGH FREQUENCY HEATTREAT
发明人： YOKOTA TSUTOMU , MATSUBARA KAZUMI , MIZOGUCHI SHIGERU , IKEGAMI YOSHIHIRO
IPC分类号： E04C5/08 , C09J163/00 , E04G21/12
摘要： PROBLEM TO BE SOLVED: To prevent a unit member from possibility of jumping out even if a rupture is caused in the unit member before it is buriedly fixed in a concrete member. SOLUTION: A PC steel rod unit is equipped with a cylindrical steel rod 11 opened at least one end; a reaction steel rod 12 which is insertedly provided inside the cylindrical steel rod 11 and has introduced compression force; and detachable tension holding means 13, 16 which hold the compression force introduced into the reaction steel rod 12 and transmit the compression force to the cylindrical steel rod 11 as tensile force. In this case, an unharden viscous material 17 to display hardening action after a fixed time is filled up in a gap between the cylindrical steel rod 11 and the reaction steel rod 12, and a connecting member is connected to both the ends of the reaction steel rod 12 so as to protrude from both the ends of the cylindrical steel rod 11, and a plate body is provided near the tip at the connecting member, and a damping member is arranged between the plate body and both the ends of the cylindrical steel rod 11 directly or through the tension holding means 13, 16.

3. 发明专利

JPH07139094A ANCHOR DEVICE FOR PRESTRESSED HOLLOW PC STEEL ROD 失效
公开(公告)号：JPH07139094A
公开(公告)日：1995-05-30
申请号：JP30853993
申请日：1993-11-16
申请人： ORIENTAL CONSTR CO LTD , HIGH FREQUENCY HEATTREAT
发明人： YOKOTA TSUTOMU , TEZUKA MASAMICHI , IMAI AKIFUMI
IPC分类号： E04C5/12
摘要： PURPOSE:To hold pre-stress introduced to a hollow PC steel rod, using the rod as a reaction force bearing member by employing an anchor device having a simple construction and a small size. CONSTITUTION:A stopper 3 is detachably fixed to one end of a hollow PC steel rod 1 for catching one end of another PC steel rod 2 inserted therein, and an internal thread 6 formed on one end of a bearing cylinder 5 is screwed to an external thread formed on the external surface of the other end of the rod L1. An external thread formed on the external surface of an annular engagement piece 8 is screwed to the internal thread on the other end of the cylinder 5, thereby coupling a presser engagement piece 10 at an intermediate position in the cylinder 5 to the annular engagement piece 8. According to this construction, a compression force is applied to the PC steel rod 2 and tension pre-stress is introduced to the hollow PC steel rod 1.

4. 发明专利

JPH08151632A PC STEEL ROD UNIT AND FASTENING METHOD FOR CEMENT HARDENING OBJECT USING IT 失效
公开(公告)号：JPH08151632A
公开(公告)日：1996-06-11
申请号：JP31889194
申请日：1994-12-21
申请人： ORIENTAL CONSTR CO LTD , HIGH FREQUENCY HEATTREAT
发明人： WATABE ATSUSHI , YOKOTA TSUTOMU , TEZUKA MASAMICHI , IMAI AKIFUMI
IPC分类号： E02B3/06 , E01D1/00 , E01D2/00 , E01D101/26 , E01D101/28 , E02D5/76 , E02D5/80 , E04B1/41 , E04C5/08 , E04G21/12
摘要： PURPOSE: To simply apply prestress to a cement hardening object by the pretension method by opening one end of a cylindrical tension PC steel rod, inserting a reaction PC steel rod into the tension PC steel rod, and stretching and holding the tension PC steel rod. CONSTITUTION: When a structure is to be fixed to the ground by a PC steel rod unit 10, an anchor hole for arranging a hollow PC steel rod 11 is drilled in the ground. A hollow PC steel rod 11 stretched and held by a solid PC steel rod 12 and a tension holding member 13 is arranged in the anchor hole. An anchor body section for fixing the outer periphery of one end of the hollow PC steel rod 11 and near it to the ground is formed with an anchor body member 14. An anchor head section for fixing the outer periphery of the other end of the hollow PC steel rod 11 and near it is formed with a nut 15. The solid PC steel rod 12 and the nut 13a' and the bolt 13b' of the tension holding member 13 stretching and holding the hollow PC steel rod 11 are removed, and prestress is applied to a structure and the ground stuck with the hollow PC steel rod 11.

5. 发明专利

JPH08135194A TENSION DEVICE FOR HOLLOW PC STEEL BAR 失效
公开(公告)号：JPH08135194A
公开(公告)日：1996-05-28
申请号：JP29370494
申请日：1994-11-04
申请人： ORIENTAL CONSTR CO LTD , YAMAMOTO KOUJIYUUKI KK , HIGH FREQUENCY HEATTREAT
发明人： YOKOTA TSUTOMU , TEZUKA MASAMICHI , IMAI AKIFUMI , YAMAMOTO HITOSHI , MIZOGUCHI SHIGERU
IPC分类号： E04C5/12 , E04G21/12
摘要： PURPOSE: To impart prestress to a hollow PC steel bar by a pretension system. CONSTITUTION: A rear frame 2 with a center hole jack 1, and a front frame 4 with a hollow PC steel bar inserting through-hole 3 are disposed with a space and connected by connecting rods 5 to constitute a frame 6 with a jack. A screw rod 9 is screwed in a longitudinally movable state with a hollow piston rod 8 in the center hole jack 1. The front end part of a screw rod rotating drive shaft 11 with a rotating lever 10 is engaged with the rear end part of the screw rod 9, and the rear end part of a push-in relay rod 14 is locked to the front end part of the screw rod 9. A support cylinder 18 having an internal thread 17 is screwed with an external thread on the rear end outer side of a hollow PC steel bar 15 insert-disposed in the hollow PC steel bar inserting through-hole 3. An annular locking piece 19 is fixed to the rear end part of the support cylinder 18, and a pressing lock piece 21 fitted to the rear end part of a PC steel bar 20 inserted in the hollow PC steel bar 15 is disposed at the intermediate inner part of the support cylinder 18.

6. 发明专利

JP2005282023A Connection structure of pc steel bar and prestressed concrete construction 有权
标题翻译： PC钢条和预制混凝土结构的连接结构
公开(公告)号：JP2005282023A
公开(公告)日：2005-10-13
申请号：JP2004094731
申请日：2004-03-29
申请人： High Frequency Heattreat Co Ltd , Oriental Construction Co Ltd , オリエンタル建設株式会社 , 高周波熱錬株式会社
发明人： YOKOTA TSUTOMU , OSHIDA HIDEJI , GO SHIYOUNEI , TANAKA NORIO
IPC分类号： E04C5/08 , E04C5/18
摘要： PROBLEM TO BE SOLVED: To provide a connection structure of a PC steel bar and a prestressed concrete construction capable of lessening possibility of the interference with reinforcement in a joint part between compressed PC steel bars and, at the same time, decreasing the partial loss of area for connecting the compressed PC steel bars to each other as much as possible.
SOLUTION: In the connection structure of the PC steel bars 4 and 5 used for introducing tensile pre-stress to the compression side of a concrete member, a plurality of PC steel bar insertion pipes 6 and 7 are respectively inserted in both ends of a thick short pipe 8 to screw them to each other, a plurality of PC steel bars are respectively inserted in the PC steel bar insertion pipes so that the front end faces can be abutted on each other in the middle part of the inside of the thick short pipe, spaces among the PC steel bar insertion pipes, the thick short pipe and a plurality of PC steel bars are filled with anticorrosives, and when compressive stress is introduced to a plurality of PC steel bars, the front end faces are closely connected to each other.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供PC钢筋和预应力混凝土结构的连接结构，能够减轻压缩PC钢筋之间的接合部分中的加强干扰的可能性，并且同时减少尽可能地将压缩的PC钢筋彼此连接的部分损失区域。解决方案：在用于将拉伸预应力引入混凝土构件的压缩侧的PC钢棒4和5的连接结构中，多个PC钢棒插入管6和7分别插入两端一个较厚的短管8将它们彼此拧紧，多个PC钢筋分别插入PC钢棒插入管中，使得前端面可以在内侧的中间部分彼此抵接粗短管，PC钢棒插入管，粗短管和多个PC钢条之间的空间填充有防腐蚀剂，当压缩应力引入多个PC钢筋时，前端面紧密连接对彼此。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2005282022A Post-compressing system and post-compressing construction method 有权
标题翻译：后压系统和压缩后施工方法
公开(公告)号：JP2005282022A
公开(公告)日：2005-10-13
申请号：JP2004094719
申请日：2004-03-29
申请人： High Frequency Heattreat Co Ltd , Oriental Construction Co Ltd , オリエンタル建設株式会社 , 高周波熱錬株式会社
发明人： YOKOTA TSUTOMU , OSHIDA HIDEJI , TANAKA NORIO
IPC分类号： E04G21/12
摘要： PROBLEM TO BE SOLVED: To provide a system for a post-compressing construction method capable of pushing in a PC steel bar by a jack, even if a recessed part as a jack installing space is not formed in a concrete member.
SOLUTION: The concrete member 4 is provided with the recessed part 3 for operating an anchoring nut 2 threadedly engaged with the compressed PC steel bar 1. A pipe body 6 for inserting a rod 5a of the jack 5 is arranged in the concrete member so that one end of the pipe body projects from an end part of the concrete member on the same axis as the compressed PC steel bar. A first receiving part 7 is arranged on the projecting end of the pipe body, and a second receiving part 5b is arranged in a position opposed to the first receiving part in the jack. The jack for inserting the rod into the pipe body is detachably fixed by a connecting member 8 having engaging parts 8a and 8b detachably locking on the first and second receiving parts.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：即使在混凝土构件中没有形成作为千斤顶安装空间的凹部，也能够提供能够通过千斤顶将PC钢棒推压的后压缩构造方法的系统。解决方案：混凝土构件4设置有用于操作与压缩PC钢棒1螺纹接合的锚固螺母2的凹部3.用于插入千斤顶5的杆5a的管体6布置在混凝土中使得管体的一端从与混凝土构件的端部在与压缩PC钢棒相同的轴线上突出。第一容纳部7布置在管体的突出端上，第二接收部5b布置在与插座中的第一接收部相对的位置。用于将杆插入管体的千斤顶通过具有可拆卸地锁定在第一和第二接收部分上的接合部分8a和8b的连接构件8可拆卸地固定。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2006161496A Compressing unit, and construction method of prestressed concrete structure 审中-公开
标题翻译：压缩单元和预应力混凝土结构的施工方法
公开(公告)号：JP2006161496A
公开(公告)日：2006-06-22
申请号：JP2004358057
申请日：2004-12-10
申请人： High Frequency Heattreat Co Ltd , Oriental Construction Co Ltd , オリエンタル建設株式会社 , 高周波熱錬株式会社
发明人： YOKOTA TSUTOMU , OSHIDA HIDEJI , GO SHIYOUNEI
IPC分类号： E04C5/08
摘要： PROBLEM TO BE SOLVED: To provide a compressing unit and a construction method of a prestressed concrete structure using the compressing unit easily manufactured at a low cost with few restrictions and causing little degradation of a prestressed concrete steel bar.
SOLUTION: The compressing unit 1 used for introducing tensile prestress to the compressed side of a concrete member, is formed by filling a cement-based grout material 2 including a micro granular material and having hardening retarding property, into a steel pipe 3 and then inserting the prestressed concrete steel bar 4 in the steel pipe 3.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用压缩单元的压缩单元和施工方法，该压缩单元容易地以低成本制造，几乎没有限制，并且几乎不会使预应力混凝土钢筋退化。解决方案：将用于将拉伸预应力引入混凝土构件的压缩侧的压缩单元1通过将包含微粒状材料并具有硬化阻滞特性的水泥基浆料2填充到钢管3中而形成然后将预应力混凝土钢筋4插入钢管3中。版权所有（C）2006，JPO＆NCIPI

9. 发明专利

JP2000110354A METHOD FOR INJECTING VISCOUS MATERIAL IN GAP BETWEEN PIPE AND ROD MATERIAL 失效
公开(公告)号：JP2000110354A
公开(公告)日：2000-04-18
申请号：JP28434398
申请日：1998-10-06
申请人： HIGH FREQUENCY HEATTREAT , ORIENTAL CONSTRUCTION CO LTD
发明人： OKA KAZUTOMI , MIZOGUCHI SHIGERU , YOKOTA TSUTOMU
IPC分类号： E04C5/08 , E04G21/12
摘要： PROBLEM TO BE SOLVED: To provide an injection method capable of efficiently injecting viscous material in a gap between a pipe and a rod material constituting a PC steel rod unit or the like and improving workability. SOLUTION: A solid PC steel rod 102 is inserted in a hollow PC steel rod 101 while it applies viscous material A on the outer peripheral face. Thus, since the viscous material A corresponding with the movement of the solid PC steel rod 102 reaches up to the front end of the hollow PC steel rod 101, the viscous material A can be injected in a short time as compared with the conventional for applying pressure and injecting it by moving the solid PC steel rod 102 at a prescribed speed. In addition, since the viscous material A is applied on the solid PC steel rod 102, especially cavity is difficult to produce in a boundary between the solid PC steel rod 102 and the viscous material A, and the viscous material A can be surely injected as compared with the conventional.

10. 发明专利

JP2001288896A PRESTRESS INTRODUCING DEVICE AND PRESTRESS INTRODUCING METHOD TO CONCRETE STRUCTURAL BODY UTILIZING THEREOF 失效
公开(公告)号：JP2001288896A
公开(公告)日：2001-10-19
申请号：JP2000102104
申请日：2000-04-04
申请人： HIGH FREQUENCY HEATTREAT , ORIENTAL CONSTRUCTION CO LTD
发明人： SAKATA SHINJI , MIZOGUCHI SHIGERU , YOKOTA TSUTOMU
IPC分类号： E01D19/02 , E01D1/00 , E01D2/00 , E01D21/00 , E01D101/24 , E01D101/26 , E01D101/28 , E04C3/26 , E04G21/12
摘要： PROBLEM TO BE SOLVED: To provide a prestress introducing device facilitating its handling and accelerating the introducing work and a prestress introducing method to a concrete structural body. SOLUTION: A plastic deforming means plastically deforming a spacer 5 is provided in the spacer 5 inserted between a rod-like member 4 and a holding member 10. The deforming speed of the spacer 5 can be set to the speed suitable to release the compression of the rod-like member 4 by properly setting the hardness and size of the spacer 5, and the compressed state of the rod-like member 4 can be automatically released in a proper time. The handling of the prestress introducing device 1 is facilitated, and the prestress introducing work to the concrete structural body can be quickly conducted.

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