公开(公告)号：US20150198196A1

公开(公告)日：2015-07-16

申请号：US14410823

申请日：2013-06-26

Applicant: TOPURA CO., LTD.

Inventor： Naoki Horiuchi

IPC: F16B35/04

CPC classification number: F16B35/04 ,  F16B25/0021 ,  F16B25/0068 ,  F16B25/0084

Abstract: A tapping screw provides sufficient tightening force even if used with a thin screwed member and tightening target member. The tapping screw (100) includes a first ridge (11) and a second ridge (12) configured to have incomplete threads that are 180° out of phase. The tapping screw (100) includes a first tightening force improvement ridge (13) and a second tightening force improvement ridge (14) that are set so as to be smaller than the outside diameters of complete thread sections of parallel threaded portions of the first ridge (11) and the second ridge (12) but larger than the inside diameter of the prepared hole are provided in each of areas which are 90° out of phase with the first ridge (11) and the second ridge (12), respectively, such that the tightening force improvement ridges bite into the prepared hole when the screw is fully screwed in.

Abstract translation: 自攻螺丝提供足够的紧固力，即使与细螺纹部件和紧固目标部件一起使用。 自攻螺钉（100）包括第一脊（11）和第二脊（12），其构造成具有相位相差180°的不完全螺纹。 自攻螺钉（100）包括第一紧固力改进脊（13）和第二紧固力改进脊（14），其被设定为小于第一脊的平行螺纹部分的完整螺纹部分的外径 （11）和第二脊部（12）但大于所制备的孔的内径分别设置在与第一脊部（11）和第二脊部（12）相差90°的区域中， 使得当螺钉被完全拧入时，紧固力改进脊咬入准备好的孔中。

公开(公告)号：US11846311B2

公开(公告)日：2023-12-19

申请号：US17251595

申请日：2019-06-12

Applicant: TOPURA CO., LTD.

Inventor： Naoki Horiuchi ,  Keisuke Hibino

IPC: F16B33/02 ,  F16B35/04

CPC classification number: F16B33/02 ,  F16B35/047

Abstract: An external thread member capable of preventing oblique entry or insertion by a short screw tip shape is provided including, in its shank portion (20), a normal thread area (22), a guide thread area (24) provided at a tip side of the shank portion with respect to the normal thread area (22) and in which a guide screw thread (23) is formed, and a rising area (26) in which a transition screw thread (25) gradually rising from the guide screw thread (23) to the complete screw thread (21) is formed. A tapered guide portion (30) is provided at a tip end side of the normal thread area (22) and includes at least the guide thread area (24). The guide screw thread (23) is formed on an outer periphery of the tapered guide portion (30) which has a maximum diameter equal to or smaller than an inner diameter of an internal thread.

公开(公告)号：US11953045B2

公开(公告)日：2024-04-09

申请号：US17430625

申请日：2020-02-03

Applicant: TOPURA CO., LTD.

Inventor： Shigeto Mori ,  Mayumi Matsuno ,  Naoki Horiuchi

IPC: F16B33/02

CPC classification number: F16B33/02

Abstract: To provide a screw thread which achieves a further reduction in screwing torque while securing removability of a coating film or the like and which is capable of stabilizing conductivity. In a screw thread in which a recessed portion (7) is partially provided on a flank surface (131) of a screw thread ridge provided on a screw thread shaft main body (5), a screw thread ridge (13) in a section where the recessed portion (7) is formed is smaller than a regular screw thread ridge (3), and a ridge height (H12) in a distal end portion in a screwing direction is lower than a ridge height (H11) in a rear end portion in the screwing direction W.

公开(公告)号：US09267528B2

公开(公告)日：2016-02-23

申请号：US14410823

申请日：2013-06-26

Applicant: TOPURA CO., LTD.

Inventor： Naoki Horiuchi

IPC: F16B25/00 ,  F16B35/04

CPC classification number: F16B35/04 ,  F16B25/0021 ,  F16B25/0068 ,  F16B25/0084

Abstract: A tapping screw provides sufficient tightening force even if used with a thin screwed member and tightening target member. The tapping screw (100) includes a first ridge (11) and a second ridge (12) configured to have incomplete threads that are 180° out of phase. The tapping screw (100) includes a first tightening force improvement ridge (13) and a second tightening force improvement ridge (14) that are set so as to be smaller than the outside diameters of complete thread sections of parallel threaded portions of the first ridge (11) and the second ridge (12) but larger than the inside diameter of the prepared hole are provided in each of areas which are 90° out of phase with the first ridge (11) and the second ridge (12), respectively, such that the tightening force improvement ridges bite into the prepared hole when the screw is fully screwed in.

Abstract translation: 自攻螺丝提供足够的紧固力，即使与细螺纹部件和紧固目标部件一起使用。 自攻螺钉（100）包括第一脊（11）和第二脊（12），其构造成具有相位相差180°的不完全螺纹。 自攻螺钉（100）包括第一紧固力改进脊（13）和第二紧固力改进脊（14），其被设定为小于第一脊的平行螺纹部分的完整螺纹部分的外径 （11）和第二脊部（12）但大于所制备的孔的内径分别设置在与第一脊部（11）和第二脊部（12）相差90°的区域中， 使得当螺钉被完全拧入时，紧固力改进脊咬入准备好的孔中。

公开(公告)号：US11795986B2

公开(公告)日：2023-10-24

申请号：US17160151

申请日：2021-01-27

Applicant: TOPURA CO., LTD.

Inventor： Minoru Sugiyama ,  Shigeto Mori ,  Mayumi Matsuno ,  Naoki Horiuchi

IPC: F16B25/00 ,  F16B5/00

CPC classification number: F16B5/0052

Abstract: An external screw member includes a parallel screw portion and a tapered screw portion provided on a side further toward a tip end than the parallel screw portion, and a plurality of sets of step portion and a transition screw thread portion are provided on at least one of the parallel screw portion and the tapered screw portion, the step portion having a reduced thread height in a radial direction and the transition screw thread portion gradually increasing in diameter from the step portion in an anti-driving rotation direction so as to reach a thread height of a normal screw thread portion. A top portion of the transition screw thread portion is positioned at an offset toward a pressure side relative to a position of a regular screw pitch in a minimum diameter portion of the step portion, and transitions to the regular screw pitch in the anti-driving rotation direction.

公开(公告)号：US11279990B2

公开(公告)日：2022-03-22

申请号：US15999785

申请日：2017-02-16

Applicant: NHK SPRING CO., LTD. ,  TOPURA CO., LTD.

Inventor： Noriyoshi Kaneda ,  Takeshi Suzuki ,  Kouhei Miyamoto ,  Naoki Horiuchi

IPC: C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22C21/08 ,  C22C21/02 ,  C22C21/00 ,  C22F1/043 ,  C22F1/057 ,  F16B19/06 ,  F16B35/00 ,  F16B37/00

Abstract: An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.