公开(公告)号：US09752609B2

公开(公告)日：2017-09-05

申请号：US14903553

申请日：2014-07-08

Applicant: TOPURA CO., LTD.

Inventor： Shigeto Mori ,  Hiroshi Nakano ,  Yosuke Okamura ,  Seiya Hoshino

IPC: F16B35/04 ,  F16B39/30 ,  B21H3/02

CPC classification number: F16B35/048 ,  B21H3/02 ,  F16B39/30

Abstract: A threaded fastener is provided in which a head bearing surface can be in full intimate contact with a counterpart. The threaded fastener is provided with a head (10), and a screw shank (20) extending from the head (10). The screw shank (20) is provided with a parallel thread portion (22) having a complete screw thread formed therein, a neck portion (24) having no screw thread, a transition thread portion (26) having an incomplete screw thread formed to extend from the parallel thread portion (22) toward the neck portion (24) with its root diameter being the same as that of the complete screw thread and with its thread height gradually becoming lower to reach the neck portion, and an underneck rounded portion (28) formed in a corner angle portion between the neck portion (24) and a head bearing surface (11), wherein the neck portion (24) is work hardened with its diameter being narrowed from a root diameter of the parallel thread portion (22).

公开(公告)号：US20240247680A1

公开(公告)日：2024-07-25

申请号：US18566016

申请日：2021-09-16

Applicant: TOPURA CO., LTD.

Inventor： Youichi MATSUEDA

IPC: F16B43/00 ,  F16J15/10

CPC classification number: F16B43/001 ,  F16J15/10

Abstract: To provide a screwing fastener that is capable of preventing damage to a function adding member when tightening, and is capable of maintaining suitable functions of the function adding member and a suitable fastened state. A screwing fastener includes a fastener main body 10, a screw portion 13 for tightening the fastener main body 10 to a fastened member 200, a flange portion 14 provided to the fastener main body 10, and a seal function adding member 20 (function adding member) that is provided to the flange portion 14, in which the seal function adding member 20 comes into contact with the fastened member when tightening. The seal function adding member 20 has at least a two-layer structure of a sliding portion 22 (first adding portion) that is in contact with the flange portion 14, and a seal portion 21 (second adding portion) that comes into contact with the fastened member 200.

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：US20220128082A1

公开(公告)日：2022-04-28

申请号：US17430625

申请日：2020-02-03

Applicant: TOPURA CO., LTD.

Inventor： Shigeto MORI ,  Mayumi MATSUNO ,  Naoki HORIUCHI

IPC: 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：US20210301861A1

公开(公告)日：2021-09-30

申请号：US17217056

申请日：2021-03-30

Applicant: TOPURA CO., LTD.

Inventor： Youichi MATSUEDA

IPC: F16B43/00 ,  F16B23/00 ,  F16B35/04

Abstract: A threaded fastener includes a bolt and a washer. The washer has a washer main body and a seal member provided at an outer peripheral side of the washer main body. The washer is caulked and fixed to a shank portion of the bolt in a water stop state, and the seal member is in contact with a fastened member in a water stop state, with a bearing surface of the washer main body held in contact with the fastened member. The seal member is provided on its outer periphery with a protrusion portion that protrudes outward beyond a radially outer end of a contact portion of the seal member with the washer in a no-load state. A back surface of the protrusion portion on the opposite side of the fastened member is an inclined surface.

公开(公告)号：US20210254652A1

公开(公告)日：2021-08-19

申请号：US17251595

申请日：2019-06-12

Applicant: TOPURA CO., LTD.

Inventor： Naoki HORIUCHI ,  Keisuke HIBINO

IPC: F16B33/02 ,  F16B35/04

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：US10954985B2

公开(公告)日：2021-03-23

申请号：US16879344

申请日：2020-05-20

Applicant: TOPURA CO., LTD.

Inventor： Takehiro Okuwaki ,  Takeki Sawanishi ,  Shigeto Mori ,  Mayumi Matsuno ,  Yoshie Sato

IPC: F16B35/04 ,  F16B25/00 ,  F16B25/10 ,  F16B33/02

Abstract: An external screw member includes a head, a shank, a parallel threaded portion, a tapered threaded portion, a screw thread, a convex portion and a screw driving side end face of the convex portion. The convex portion protruding more radially outward than the crest of the screw thread is formed in at least one of the parallel threaded portion and the tapered threaded portion over the tapered threaded portion and the parallel threaded portion. The screw driving side end face of the convex portion is configured to form an inclined plane which gradually rises from a root position of the end face at the side of the crest of the screw thread toward a crest of the convex portion in a direction opposite to a screw driving direction of the screw thread to reach the crest of the convex portion.

公开(公告)号：US20160169263A1

公开(公告)日：2016-06-16

申请号：US14903553

申请日：2014-07-08

Applicant: TOPURA CO., LTD.

Inventor： Shigeto MORI ,  Hiroshi NAKANO ,  Yosuke OKAMURA ,  Seiya HOSHINO

IPC: F16B35/04 ,  B21H3/02

CPC classification number: F16B35/048 ,  B21H3/02 ,  F16B39/30

Abstract: A threaded fastener is provided in which a head bearing surface can be in full intimate contact with a counterpart. The threaded fastener is provided with a head (10), and a screw shank (20) extending from the head (10). The screw shank (20) is provided with a parallel thread portion (22) having a complete screw thread formed therein, a neck portion (24) having no screw thread, a transition thread portion (26) having an incomplete screw thread formed to extend from the parallel thread portion (22) toward the neck portion (24) with its root diameter being the same as that of the complete screw thread and with its thread height gradually becoming lower to reach the neck portion, and an underneck rounded portion (28) formed in a corner angle portion between the neck portion (24) and a head bearing surface (11), wherein the neck portion (24) is work hardened with its diameter being narrowed from a root diameter of the parallel thread portion (22).

Abstract translation: 提供了一种螺纹紧固件，其中头部支承表面可与对应物完全紧密接触。 螺纹紧固件设置有头部（10）和从头部（10）延伸的螺钉柄（20）。 螺杆（20）具有形成有完整螺纹的平行螺纹部分（22），不具有螺纹的颈部（24），具有不完整螺纹的过渡螺纹部分（26）形成为延伸 从平行螺纹部分（22）朝向颈部部分（24），其根直径与完整螺纹的根直径相同，并且其螺纹高度逐渐变低以到达颈部部分，以及底部圆形部分（28 ）形成在颈部（24）和头部支承表面（11）之间的角角部分中，其中颈部（24）的工作硬化，其直径从平行螺纹部分（22）的根部直径变窄， 。

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。