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1. 发明专利

JPH10280457A MOUNTING DEVICE FOR FOOTREST 失效
公开(公告)号：JPH10280457A
公开(公告)日：1998-10-20
申请号：JP9443497
申请日：1997-03-31
申请人： MIYAMA IND CORP , NAKAGAWA FUME KAN KOGYO KK
发明人： TAKAHASHI EIZO , TASAKA TAKASHI
IPC分类号： E02D29/12 , E04G3/00 , E06C9/02 , E06C9/04
摘要： PROBLEM TO BE SOLVED: To provide a footrest mounting device capable of mounting a footrest easily, simply and properly, ensuring little concern about corrosion and allowing easy replacement by preliminarily implanting an insert guide in the concrete wall of a manhole, a revetment or the like, and mounting the footrest on the insert guide. SOLUTION: A synthetic resin insert guide 14 having a bottomed cylindrical body with a stopper projection 17, a nut receiving flange 16, an external thread 17 respectively formed on the outer surface, and a pin receiving groove 18 on the end of the external thread 17, is preliminarily implanted in the concrete wall 2 of a manhole, a revetment or the like. In addition, a synthetic resin nut 12 with a pin 11 positioned at a boundary between the side and the leg part 3 of the insert guide 14 for insertion into the pin receiving groove 18 thereof, and an internal thread 13 formed on the inner surface for engagement with the external thread 17 of the insert guide 14 at a position nearer the pin 11, is coupled and screwed to the insert guide 14, thereby fixing a footrest to a manhole or the like.

2. 发明专利

JPH10280451A FOOTREST MOUNTING DEVICE 失效
公开(公告)号：JPH10280451A
公开(公告)日：1998-10-20
申请号：JP9443697
申请日：1997-03-31
申请人： MIYAMA IND CORP , NAKAGAWA FUME KAN KOGYO KK
发明人： TAKAHASHI EIZO , TASAKA TAKASHI
IPC分类号： E02D29/12 , E06C9/02
摘要： PROBLEM TO BE SOLVED: To provide a mounting device capable of mounting a footrest easily, simply and properly, ensuring little concern about corrosion and allowing easy replacement by preliminarily implanting an insert guide in the concrete wall of a manhole, a revetment or the like, and mounting the footrest on the insert guide. SOLUTION: A synthetic resin insert guide 16 having a bottomed cylindrical body with a stopper projection 17 and a nut receiving flange 18 formed on the outer surface thereof and an internal thread 19 on the inner surface, is preliminarily implanted in the concrete wall 2 of a manhole, a revetment or the like. Also, a synthetic resin nut 14 with a thread 15 on the outer surface for engagement with the internal thread of the guide 16 is externally coupled to the side 4 of the guide 16. In addition, a synthetic resin cap 12 with a mandrel 6 extended from a leg end, a thread 11 formed on the extended part, and an internal thread 13 formed for engagement with the thread 11 is laid on the end of a leg part 3. Then, the nut 14 is threaded into the guide 16, thereby fastening a footrest to a manhole or the like.

3. 发明专利

JPH0932471A PROPULSION PIPE FOR PROPULSION ALONG CURVE 失效
公开(公告)号：JPH0932471A
公开(公告)日：1997-02-04
申请号：JP20841995
申请日：1995-07-24
申请人： NAKAGAWA FUME KAN KOGYO KK
发明人： HATTORI KEIKO
IPC分类号： E21D9/06
摘要： PROBLEM TO BE SOLVED: To prevent the compression destruction of a cushion material and to transmit a propelling force precisely to a propulsion pipe ahead by eliminating the possibility of compressive stresses concentrating on the cushion material at the curved part of a propulsion pipe for propulsion along curves. SOLUTION: This propulsion pipe for propulsion along curves has a plurality of pipe bodies 11a, 11b longitudinally butted together in such a way as to be free to be curved, and has cushion members 18, 19, 20 inserted between the butted ends of the pipe bodies 11a, 11b while being opposite to the radial direction and capable of compressive deformation. The cushion members 18, 19, 20 get thicker toward both sides of the bending shaft of each pipe body 11a, 11b. The cushion members 18, 19, 20 are made of, e.g. a plurality of circular segment-like members, which are laid one on another to vary their thicknesses.

4. 发明专利

JPH02192913A EXPOSURE PREVENTIVE TOOL FOR IRON REINFORCING ROD OF END PART OF REINFORCED CONCRETE PIPE 失效
公开(公告)号：JPH02192913A
公开(公告)日：1990-07-30
申请号：JP1154289
申请日：1989-01-20
申请人： NAKAGAWA FUME KAN KOGYO KK , OGIWARA TAKEHIKO
发明人： NOGUCHI MASAHIRO , MAKIGAKI NOBUO
IPC分类号： E04C5/02 , B28B21/68
摘要： PURPOSE:To make finish of a pipe end part favorable by preventing exposure of a spiral reinforcing rod through concrete, by a method wherein a different part in level and a groove for a rubber band are provided in a recessed state for connection and the spiral reinforcing rod is held at the upper part by a spiral reinforcing rod fixing cover of an exposure preventive tool for an iron reinforcing rod. CONSTITUTION:A cap part 5 fitted to the tip part of an exposure preventive tool for an iron reinforcing rod is fitted into the tip part of a longitudinal reinforcing rod 1. Then a fitting part 6 provided on a base part of the exposure preventive tool for the iron reinforcing rod is fitted over the same reinforcing rod 1 on its side through a long-sized spiral reinforcing rod fixing cover 7. When it is in the case, for example, of molding of a centrifugal force reinforced concrete pipe, a cylindrical iron reinforcing rod obtained by fitting the exposure preventive tool for the iron reinforcing rod to end parts of the respective reinforcing rods 1 is inserted into a hollow and cylindrical concrete shuttering (a) and concrete (c) is cast within the concrete shuttering (a). Then the concrete shuttering (a) is turned with a rotary wheel (b), the concrete (c) is hardened through tightening by making use of centrifugal force to be generated through the rotation and the centrifugal force reinforced concrete pipe is molded.

5. 发明专利

JPH01137029A METHOD OF EXECUTING CONCRETE WATER CHANNEL 失效
公开(公告)号：JPH01137029A
公开(公告)日：1989-05-30
申请号：JP29462987
申请日：1987-11-21
申请人： NAKAGAWA FUME KAN KOGYO KK
发明人： HATTORI KEIKO
IPC分类号： E03F3/06 , E02B9/06 , E02F5/10 , F16L1/038 , F16L9/08
摘要： PURPOSE: To reduce concrete thickness and to sufficiently withstand soil pressure by burying a hollow concrete structure having a nearly square cross sectional outer shape and a circular inner shape in the ground so that one of diagonal lines of the square is made vertical. CONSTITUTION: When a concrete structure 6 having a square cross sectional outer shape and a circular inner shape around the intersection of the square is buried to construct a concrete channel, one of diagonal lines of the cross sectional outer shape is made nearly vertical for installation. When the structure 6 is installed, pedestals 10 are installed at proper positions to support the structure 6, the soil pressure applied to the structure 6 is effectively received, the occurrence of bending moment is prevented, and the whole soil pressure is received by uniform compressive stress. The concrete channel is miniaturized, execution is simplified, and the structure can be strengthened.

6. 发明专利

JPS6470174A COATING METHOD FOR INSIDE SURFACE OF TUBULAR BODY 失效
公开(公告)号：JPS6470174A
公开(公告)日：1989-03-15
申请号：JP22728987
申请日：1987-09-10
申请人： MITSUI PETROCHEMICAL IND , NAKAGAWA FUME KAN KOGYO KK
发明人： ARITA HIROYUKI , WATANABE YASUO , HASEGAWA KIYOSHI , KOGA MASANORI , HATTORI KEIKO
IPC分类号： B05D7/22 , B05D7/14 , B05D7/24
摘要： PURPOSE:To facilitate a coating operation and thick coating by coating a compsn. prepd. by mixing aggregate adjusted in a grain size distribution to a specific acrylic reactive resin on the inside surface of a rotating tubular body and curing the resin under rotation. CONSTITUTION:The compsn. having a self-leveling property is prepd. by mixing the aggregate adjusted in the grain size distribution with the acrylic reactive resin essentially consisting of at least one kind of monomer component selected from (meth)acrylic acid and the ester thereof and a polymer component which dissolves or swells in the monomer component. While the tubular body is rotated around its axis, the above-mentioned compsn. is coated on the inside surface of the pipe and is cured under rotation, by which the inside surface of the tubular body is coated. The coating is preferably executed while oscillations are applied to the tubular body together with the rotation. The aggregate having >=2 peaks in the grain size distribution is more preferable.

7. 发明专利

JPS6360142A CENTRIFUGAL MOLDING PROCESS FOR CONCRETE PRODUCT 失效
公开(公告)号：JPS6360142A
公开(公告)日：1988-03-16
申请号：JP20320286
申请日：1986-08-29
申请人： NAKAGAWA FUME KAN KOGYO KK
发明人： SUZUKI SHINPEI
IPC分类号： B28B21/30 , C04B24/30

8. 发明专利

JPS61294290A PRESTRESSED CONCRETE BEND AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS61294290A
公开(公告)日：1986-12-25
申请号：JP13716385
申请日：1985-06-24
申请人： NAKAGAWA FUME KAN KOGYO KK
发明人： ISHIKAWA SHIGEO
IPC分类号： F16L43/00 , F16L9/08

9. 发明专利

JPH1121932A FIXTURE FOR FOOTSTEP TOOL 失效
公开(公告)号：JPH1121932A
公开(公告)日：1999-01-26
申请号：JP18601097
申请日：1997-06-27
申请人： MIYAMA IND CORP , NAKAGAWA FUME KAN KOGYO KK
发明人： TAKAHASHI EIZO , TASAKA TAKASHI
IPC分类号： E02D29/12 , E04G3/00 , E06C9/02 , E06C9/04
摘要： PROBLEM TO BE SOLVED: To provide a fixture for a footstep tool, which is installed simply, easily and surely, in which the possibility of corrosion is reduced and which is exchanged readily, by beforehand implanting an insert guide into the concrete wall of a manhole, etc., and mounting the footstep on the insert guide. SOLUTION: An insert guide 17, in which a screw 18 for holding a spring is formed to an outer circumference, the spring 19 for preventing slipping-off screwed to the screw is arranged, a female screw 20 is screwed to an inner circumference and a diameter-expanding section 21 is formed to a female-screw inlet and which is made of a synthetic resin, is implanted beforehand into a concrete wall 2, a holding material 14, in which a screw 15 screwed to the female screw of the insert guide 17 is screwed to an outer circumference and a flange 16 is formed at the root of the screw 15 and which is made of the synthetic resin, is inserted on the side section 4 side, and a cap 12, in which a mandrel 6 is further extended from the end section of a leg section 3 and a screw 11 is screwed to an extending section and a female screw 13 screwed with the screw 15 is screwed and which is made of the synthetic resin, is arranged at the end section of the leg section 3. The footstep tool 1 is fixed onto a manhole, etc., by screwing the holding material 14 into the insert guide 17.

10. 发明专利

JPH10280456A MOUNTING DEVICE FOR FOOTREST 失效
公开(公告)号：JPH10280456A
公开(公告)日：1998-10-20
申请号：JP9443397
申请日：1997-03-31
申请人： MIYAMA IND CORP , NAKAGAWA FUME KAN KOGYO KK
发明人： TAKAHASHI EIZO , TASAKA TAKASHI
IPC分类号： E02D29/12 , E04G3/00 , E06C9/02 , E06C9/04
摘要： PROBLEM TO BE SOLVED: To provide a footrest mounting device capable of mounting a footrest easily, simply and properly, ensuring little concern about corrosion and allowing easy replacement by preliminarily implanting an insert guide in the concrete wall of a manhole, a revetment or the like, and mounting the footrest on the insert guide. SOLUTION: A synthetic resin insert guide 15 with an internal thread 16 on the inner surface and a stopper projection 17 on the outer surface is preliminarily implanted in the concrete wall 2 of a manhole, a revetment or the like. Also, a synthetic resin nut 12 with external threads 15 on the side 4 of a footrest 1 and on the outer surface of a leg part 3, an internal threads on the inner surface for engagement with the external threads 11 on the side 4 and the leg part 3 and an external thread 14 for engagement with the internal thread of the insert guide 15, is fitted so as to be movable in a lateral direction, and screwed to the insert guide 15, thereby fixing the footrest 1 to a manhole or the like.

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