JP2005083523A - Connecting screw fitting - Google Patents

Connecting screw fitting Download PDF

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JP2005083523A
JP2005083523A JP2003318131A JP2003318131A JP2005083523A JP 2005083523 A JP2005083523 A JP 2005083523A JP 2003318131 A JP2003318131 A JP 2003318131A JP 2003318131 A JP2003318131 A JP 2003318131A JP 2005083523 A JP2005083523 A JP 2005083523A
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diameter
screw
thread
screw portion
small
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Hiroyuki Sugano
裕之 菅野
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Abstract

<P>PROBLEM TO BE SOLVED: To improve tensile strength and prevent the rupture or bending of a fixing screw portion without giving more labor burden to worker. <P>SOLUTION: This connecting screw fitting 1 comprises an intermediate collar portion 2, the fixing screw portion 3, and a mounting screw portion 4. The fixing screw portion 3 consists of a large diameter screw portion 9 having a large diameter and a small diameter screw portion 10 having a small diameter. A pitch P2 of the thread of the large diameter screw portion 9 is greater than a pitch P1 of the thread of the small diameter screw portion 10. The large diameter screw portion 9 is provided on part of the fixing screw portion 3, thus improving the tensile strength and preventing the rupture or bending of the fixing screw portion 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、中間鍔部の両側に固定ねじ部および取付けねじ部がそれぞれ突出する連結ねじ金具に係り、特に型枠を保持する矢板控金具を壁面に固定する場合等に用いるのに好適な連結ねじ金具に関する。   The present invention relates to a connecting screw fitting in which a fixing screw portion and a mounting screw portion protrude from both sides of an intermediate collar portion, and particularly suitable for use when fixing a sheet pile holding metal holding a formwork to a wall surface. It relates to screw fittings.

従来から、山留め壁や連続地中壁等の壁体に適用されるコンクリート型枠を保持する場合には、前記壁体に矢板控金具の一端を取付けるとともに、矢板控金具の他端にセパレータの基端部をねじ込み、セパレータの先端部に取付けられたピーコンで、型枠を内側から保持する方法が採られている。   Conventionally, when holding a concrete formwork applied to a wall body such as a retaining wall or a continuous underground wall, one end of a sheet pile detent is attached to the wall body and a separator is attached to the other end of the sheet pile detent. A method is adopted in which a base end portion is screwed and a formwork is held from the inside with a peakon attached to the front end portion of the separator.

ところで、矢板控金具の一端を壁体に取付ける場合、従来は、図11に示すように、工具掛け部を兼ねた中間鍔部101と、タッピングねじで形成されて中間鍔部101の一側から突出する固定ねじ部102と、通常の雄ねじで形成されて中間鍔部101の他側から突出する取付けねじ部103とで構成される連結ねじ金具100を用い、金属製の取付け面104に穿設された下穴105に、前記固定ねじ部102を強制的にねじ込んで、取付けねじ部103が取付け面104から突出した状態とした後、この取付けねじ部103に、矢板控金具の一端を螺装連結するようにしている。
実用新案登録第3053360号
By the way, when attaching one end of the sheet pile holding bracket to the wall body, conventionally, as shown in FIG. 11, an intermediate collar 101 that also serves as a tool hook and a tapping screw formed from one side of the intermediate collar 101. Using a connecting screw fitting 100 formed of a protruding fixing screw portion 102 and a mounting screw portion 103 that is formed of a normal male screw and protrudes from the other side of the intermediate flange 101, a metal mounting surface 104 is drilled. The fixing screw portion 102 is forcibly screwed into the prepared pilot hole 105 so that the attachment screw portion 103 protrudes from the attachment surface 104, and then one end of the sheet pile holding metal fitting is screwed into the attachment screw portion 103. I try to connect them.
Utility model registration No.3053360

前記従来の連結ねじ金具においては、矢板控金具に3000kg/f程度の負荷がかかった場合には、固定ねじ部102が下穴105から抜け出て連結ねじ金具100が取付け面104から脱落してしまうと云う問題があるとともに、連結ねじ金具100が斜め方向に引張られたり、あるいは連結ねじ金具100を下穴に強い力でねじ込み過ぎたりすると、固定ねじ部102が中間鍔部101側の端部で破断したり、曲がってしまうと云う問題がある。   In the conventional connecting screw fitting, when a load of about 3000 kg / f is applied to the sheet pile holding fitting, the fixing screw portion 102 comes out of the pilot hole 105 and the connecting screw fitting 100 falls off the mounting surface 104. If the connecting screw fitting 100 is pulled in an oblique direction, or if the connecting screw fitting 100 is excessively screwed into the pilot hole with a strong force, the fixing screw portion 102 is at the end on the intermediate flange 101 side. There is a problem that it breaks or bends.

このような問題点を解決する方法としては、固定ねじ部102の径を太くするとともに、長さを長くすることが考えられるが、固定ねじ部102の長さは、取付け面104の金属部分の厚さに影響されて一定の制限があるため、専ら固定ねじ部102の径を太くして対処せざるを得ない。   As a method for solving such a problem, it is conceivable to increase the diameter of the fixing screw portion 102 and to increase the length thereof. However, the length of the fixing screw portion 102 is the length of the metal portion of the mounting surface 104. Since there is a certain limitation influenced by the thickness, it is necessary to deal with by increasing the diameter of the fixing screw portion 102 exclusively.

ところが、固定ねじ部102の径を太くすると、固定ねじ部102を下穴105に強制的にねじ込む際に、その摩擦熱でねじ山がへたってしまい、下穴105へのねじ込みが不可能になるおそれがあるとともに、ねじ込み作業にも時間がかかり、作業者の労力負担が増大して現場から敬遠され易いと云う問題がある。   However, when the diameter of the fixing screw portion 102 is increased, when the fixing screw portion 102 is forcibly screwed into the pilot hole 105, the screw thread is sagged by the frictional heat, and screwing into the pilot hole 105 becomes impossible. In addition, there is a problem that the screwing work takes time, and the labor burden on the worker increases, so that it is easy to avoid the site.

本発明は、かかる現況に鑑みなされたもので、5000kg/f以上の引張強度を確保することができるとともに、固定ねじ部の破断や曲がり等も防止でき、しかもねじ山がへたったり、ねじ込み作業に時間がかかって、作業者の労力負担が増大すると云ったおそれもない連結ねじ金具を提供することを目的とする。   The present invention has been made in view of the present situation, and can secure a tensile strength of 5000 kg / f or more, prevent breakage or bending of the fixing screw portion, and also cause screw threads to be slackened or screwed in. It is an object of the present invention to provide a connecting screw fitting that does not take a long time to increase the labor burden on the operator.

本発明の他の目的は、固定ねじ部の破断や曲がり等を防止しつつ、ねじ山のへたりや作業者の労力負担の増大を極力抑えることができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting capable of suppressing the increase in the labor load on the operator and the thread as much as possible while preventing breakage or bending of the fixing screw portion.

本発明の他の目的は、引張強度をより向上させることができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting that can further improve the tensile strength.

本発明の他の目的は、予め定められた太径ねじ部の長さ寸法のなかで、最適のねじ山数を得ることができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting capable of obtaining an optimum number of screw threads within a predetermined length dimension of a large-diameter screw portion.

本発明の他の目的は、一定以上の引張強度を確保しつつ、作業者の労力負担の増大をより少なくすることができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting that can reduce an increase in labor burden on an operator while ensuring a certain or higher tensile strength.

本発明の他の目的は、工具掛け部を確保しつつ、構造の簡素化を図ることができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting capable of simplifying the structure while securing a tool hanging portion.

本発明の他の目的は、工具掛け部を確保しつつ、中間鍔部を大型化することができる連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting capable of enlarging an intermediate collar while securing a tool hook.

本発明の他の目的は、工具掛け部を確保して中間鍔部を大型化しても、金具全体の寸法を長くする必要がない連結ねじ金具を提供するにある。   Another object of the present invention is to provide a connecting screw fitting that does not require a length of the entire fitting to be increased even if a tool hook portion is secured and the intermediate collar portion is enlarged.

本発明のさらに他の目的は、工具掛け部を確保して中間鍔部を大型化しても、取付けねじ部に螺装される部材の端部を中間鍔部に密着させることができる連結ねじ金具を提供するにある。   Still another object of the present invention is to provide a connecting screw fitting capable of bringing the end of a member to be screwed into a mounting screw part into close contact with the intermediate hook part even if the tool hook part is secured and the intermediate hook part is enlarged. To provide.

前記目的を達成するため本発明は、中間鍔部と;中間鍔部の一側から突出し、壁や柱等の金属製の取付け面に取付けられる固定ねじ部と;中間鍔部の他側から突出し、雌ねじを有する部材が螺装連結される取付けねじ部と;を具備する連結ねじ金具において、前記固定ねじ部を、中間鍔部側の寸法の短い太径ねじ部と、太径ねじ部の先端側に連続する寸法の長い細径ねじ部とで構成するようにしたことを特徴とする。   In order to achieve the above object, the present invention provides an intermediate collar; a fixing screw projecting from one side of the intermediate collar and attached to a metal mounting surface such as a wall or a column; and projecting from the other side of the intermediate collar A mounting screw fitting to which a member having a female screw is screwed and connected, wherein the fixing screw portion includes a large-diameter screw portion having a short dimension on the intermediate flange side and a tip of the large-diameter screw portion. It is characterized by comprising a long and narrow thread portion having a continuous dimension on the side.

本発明はまた、細径ねじ部を、太径ねじ部の1.5〜2.5倍の長さに設定するようにしたことを特徴とする。すなわち、例えば固定ねじ部の長さが14mm程度であるとすると、太径ねじ部の長さを4〜6mm程度,細径ねじ部の長さを8〜10mm程度に設定するようにしたことを特徴とする。   The present invention is also characterized in that the small-diameter thread portion is set to a length 1.5 to 2.5 times that of the large-diameter thread portion. That is, for example, if the length of the fixed screw portion is about 14 mm, the length of the large-diameter screw portion is set to about 4 to 6 mm, and the length of the small-diameter screw portion is set to about 8 to 10 mm. Features.

本発明はまた、太径ねじ部のねじ山のピッチを、細径ねじ部のねじ山のピッチよりも広く設定するようにしたことを特徴とする。   The present invention is also characterized in that the pitch of the thread of the large-diameter thread portion is set wider than the pitch of the thread of the small-diameter thread portion.

本発明はまた、太径ねじ部のねじ山のピッチを、細径ねじ部のねじ山のピッチの2.5倍以下に設定するようにしたことを特徴とする。すなわち、細径ねじ部のねじ山のピッチを、例えば1.0〜1.5mmに設定したとすると、太径ねじ部のねじ山のピッチを、1.5〜2.5mm程度に設定するようにしたことを特徴とする。   The present invention is also characterized in that the thread pitch of the large-diameter thread portion is set to 2.5 times or less of the thread pitch of the small-diameter thread portion. That is, if the thread pitch of the small-diameter thread portion is set to, for example, 1.0 to 1.5 mm, the thread pitch of the large-diameter thread portion is set to about 1.5 to 2.5 mm. It is characterized by that.

本発明はまた、太径ねじ部を、中間鍔部側の任意ターンの大径ねじ山部と、大径ねじ山部と細径ねじ部との間に配置される複数ターンの小径ねじ山部とで構成するようにしたことを特徴とする。   The present invention also includes a large-diameter screw portion, a large-diameter screw thread portion of an arbitrary turn on the intermediate flange portion side, and a multi-turn small-diameter screw thread portion disposed between the large-diameter screw thread portion and the small-diameter screw portion. It is characterized by comprising the above.

本発明はまた、太径ねじ部を、中間鍔部から細径ねじ部に向かって、ねじ山の径が次第に縮径するテーパ状に形成するようにしたことを特徴とする。   The present invention is also characterized in that the large-diameter screw portion is formed in a tapered shape in which the diameter of the thread gradually decreases from the intermediate flange portion toward the small-diameter screw portion.

本発明はまた、中間鍔部の外周部に、工具掛け部を設けるようにしたことを特徴とする。   The present invention is also characterized in that a tool hook is provided on the outer periphery of the intermediate collar.

本発明はまた、中間鍔部の取付けねじ部側の面に、工具掛け部を設けるようにしたことを特徴とする。   The present invention is also characterized in that a tool hook portion is provided on the surface of the intermediate flange portion on the side of the mounting screw portion.

本発明はまた、取付けねじ部の先端部に、凹状または凸状の工具掛け部を設けるようにしたことを特徴とする。   The present invention is also characterized in that a concave or convex tool hook is provided at the tip of the mounting screw.

本発明はまた、取付けねじ部の外周部に、工具掛け部を設けるようにしたことを特徴とする。   The present invention is also characterized in that a tool hook portion is provided on the outer peripheral portion of the mounting screw portion.

本発明はさらに、太径ねじ部および細径ねじ部を、タッピングねじで形成するとともに、取付け面には、太径ねじ部および細径ねじ部に符合する段付き状の下穴を穿設し、固定ねじ部を、この下穴に強制的にねじ込むようにしたことを特徴とする。   In the present invention, the large-diameter screw portion and the small-diameter screw portion are formed by tapping screws, and a stepped pilot hole that matches the large-diameter screw portion and the thin-diameter screw portion is formed on the mounting surface. The fixing screw portion is forcibly screwed into the prepared hole.

本発明は、中間鍔部と;中間鍔部の一側から突出し、壁や柱等の金属製の取付け面に取付けられる固定ねじ部と;中間鍔部の他側から突出し、雌ねじを有する部材が螺装連結される取付けねじ部と;を具備する連結ねじ金具において、前記固定ねじ部を、中間鍔部側の寸法の短い太径ねじ部と、太径ねじ部の先端側に連続する寸法の長い細径ねじ部とで構成するようにしているので、大きな引張強度を確保することができるとともに、固定ねじ部の破断や曲がり等も防止でき、しかもねじ山がへたったり、ねじ込み作業に時間がかかって、作業者の労力負担が増大すると云ったおそれもない。   The present invention relates to an intermediate flange; a fixing screw that protrudes from one side of the intermediate flange and is attached to a metal mounting surface such as a wall or a column; a member that protrudes from the other side of the intermediate flange and has a female screw A fixing screw part having a dimension that is continuous with a large-diameter screw part having a short dimension on the intermediate flange part side and a distal end side of the large-diameter screw part. Since it is made up of long thin screw parts, it is possible to ensure a large tensile strength, prevent breakage and bending of the fixing screw part, and further reduce the screw thread and time for screwing work. Therefore, there is no fear that the labor burden on the worker will increase.

本発明はまた、細径ねじ部を、太径ねじ部の1.5〜2.5倍の長さに設定するようにしているので、固定ねじ部の破断や曲がり等を防止しつつ、ねじ山のへたりや作業の労力負担の増大を極力抑えることができる。   In the present invention, since the small-diameter thread portion is set to a length 1.5 to 2.5 times that of the large-diameter thread portion, the screw thread can be prevented while preventing breakage or bending of the fixed thread portion. It is possible to suppress as much as possible the mountain sag and the labor burden of work.

本発明はまた、太径ねじ部のねじ山のピッチを、細径ねじ部のねじ山のピッチよりも広く設定するようにしているので、引張強度をより向上させることができる。   In the present invention, since the pitch of the thread of the large-diameter thread portion is set wider than that of the thread of the small-diameter thread portion, the tensile strength can be further improved.

本発明はまた、太径ねじ部のねじ山のピッチを、細径ねじ部のねじ山のピッチの2.5倍以下に設定するようにしているので、予め定められた太径ねじ部の長さ寸法の中で、最適のねじ山数を確保することができる。   In the present invention, the pitch of the thread of the large-diameter thread portion is set to be 2.5 times or less of the pitch of the thread of the small-diameter thread portion. Among the dimensions, the optimum number of threads can be secured.

本発明はまた、太径ねじ部を、中間鍔部側の任意ターンの大径ねじ山部と細径ねじ部との間に配置される複数ターンの小径ねじ山部とで構成するようにしているので、一定以上の引張強度を確保しつつ、作業者の労力負担の増大を、より少なくすることができる。   In the present invention, the large-diameter thread portion is constituted by a small-diameter thread portion of a plurality of turns disposed between the large-diameter thread portion of the arbitrary turn on the intermediate flange side and the small-diameter thread portion. Therefore, an increase in the labor burden on the operator can be further reduced while ensuring a certain or higher tensile strength.

本発明はまた、太径ねじ部を、中間鍔部から細径ねじ部に向かって、ねじ山の径が次第に縮径するテーパ状に形成するようにしているので、この場合にも、一定以上の引張強度を確保しつつ、作業者の労力負担の増大を、より少なくすることができる。   In the present invention, the large-diameter screw portion is formed in a tapered shape in which the diameter of the thread gradually decreases from the intermediate flange portion toward the small-diameter screw portion. It is possible to further reduce the labor burden on the operator while ensuring the tensile strength of the operator.

本発明はまた、中間鍔部の外周部に、工具掛け部を設けるようにしているので、工具掛け部を確保しつつ、構造の簡素化を図ることができる。   In the present invention, since the tool hooking portion is provided on the outer peripheral portion of the intermediate collar portion, the structure can be simplified while securing the tool hooking portion.

本発明はまた、中間鍔部の取付けねじ部側の面に、工具掛け部を設けるようにしているので、工具掛け部を確保しつつ、中間鍔部を大型化することができる。   In the present invention, since the tool hooking portion is provided on the surface of the intermediate hook portion on the side of the mounting screw portion, the intermediate hook portion can be enlarged while securing the tool hooking portion.

本発明はまた、取付けねじ部の先端部に、凹状または凸状の工具掛け部を設けるようにしているので、工具掛け部を確保して中間鍔部を大型化しても、取付けねじ部に螺装される部材の端部を、中間鍔部に密着させることができる。   In the present invention, since a concave or convex tool hook is provided at the tip of the mounting screw, even if the tool hook is secured and the intermediate collar is enlarged, the screw is not screwed onto the mounting screw. The end of the member to be mounted can be brought into close contact with the intermediate collar.

本発明はまた、取付けねじ部の外周部に、凹状の工具掛け部を設けるようにしているので、工具掛け部を確保して中間鍔部を大型化しても、金具全体の寸法を長くする必要がない。   In the present invention, since a concave tool hook is provided on the outer periphery of the mounting screw portion, it is necessary to increase the overall size of the metal fittings even if the tool hook is secured and the intermediate collar is enlarged. There is no.

本発明はさらに、太径ねじ部および細径ねじ部を、タッピングねじで形成するとともに、取付け面には、太径ねじ部および細径ねじ部に符合する段付き状の下穴を穿設し、固定ねじ部を、この下穴に強制的にねじ込むようにしているので、通常の雄ねじの場合と異なり、下穴に雌ねじ加工を施す必要がなく、また充分な緩み止め効果も得られる。   In the present invention, the large-diameter screw portion and the small-diameter screw portion are formed by tapping screws, and a stepped pilot hole that matches the large-diameter screw portion and the thin-diameter screw portion is formed on the mounting surface. Since the fixing screw portion is forcibly screwed into the pilot hole, unlike the case of a normal male screw, it is not necessary to perform female screw processing on the pilot hole, and a sufficient locking effect can be obtained.

以下、本発明を図面を参照して説明する。
図1は、本発明の第1の実施の形態に係る連結ねじ金具を示すもので、この連結ねじ金具1は、外周部に工具掛け部が形成されている例えば六角ナット状の中間鍔部2と、タッピングねじで形成されて中間鍔部2の一側から突出する固定ねじ部3と、通常の雄ねじで形成されて中間鍔部2の他側から突出する取付けねじ部4とで構成されている。そして、この連結ねじ金具1は、金属製の取付け面5に穿設された下穴6に、前記固定ねじ部3を強制的にねじ込むことにより、中間鍔部2および取付けねじ部4を取付け面5外に露出させた状態で、取付け面5に強固に取付けられるようになっている。
The present invention will be described below with reference to the drawings.
FIG. 1 shows a connecting screw fitting according to a first embodiment of the present invention. This connecting screw fitting 1 has, for example, a hexagonal nut-shaped intermediate flange 2 having a tool hook portion formed on the outer peripheral portion. And a fixing screw portion 3 that is formed of a tapping screw and protrudes from one side of the intermediate flange portion 2, and a mounting screw portion 4 that is formed of a normal male screw and protrudes from the other side of the intermediate flange portion 2. Yes. And this connection screw metal fitting 1 attaches the intermediate collar part 2 and the attachment screw part 4 to the attachment surface by forcibly screwing the fixing screw part 3 into the pilot hole 6 drilled in the metal attachment surface 5. 5 is firmly attached to the attachment surface 5 while being exposed to the outside.

なお、前記下穴6は、図2に示す特殊形状のドリル7を用いることにより、1回の穴穿け作業で穿設されるようになっているが、これについては後に詳述する。   The pilot hole 6 is drilled by a single drilling operation by using a specially shaped drill 7 shown in FIG. 2, which will be described in detail later.

前記中間鍔部2は、前述のようにその外周部が工具掛け部を兼ねるようになっており、この中間鍔部2には、取付けねじ部4側から例えば六角ボックススパナ等の工具8が装着され、この工具8が装着された電気ドリル(図示せず)等を用いることにより、連結ねじ金具1を下穴6に容易に取付けることができるようになっている。   As described above, the outer peripheral portion of the intermediate flange portion 2 also serves as a tool hook portion, and a tool 8 such as a hexagonal box spanner is attached to the intermediate flange portion 2 from the mounting screw portion 4 side. The connecting screw fitting 1 can be easily attached to the prepared hole 6 by using an electric drill (not shown) to which the tool 8 is attached.

また、前記固定ねじ部3は、図1に示すように、中間鍔部2側の寸法の短い太径ねじ部9と、太径ねじ部9の先端側に連続する寸法の長い細径ねじ部10とから、段付き状に形成されており、前記太径ねじ部9を設けることにより、5000kg/f以上の引張強度を確保することができるとともに、固定ねじ部3の破断や曲がり等も防止できるようになっている。   Further, as shown in FIG. 1, the fixing screw portion 3 includes a large-diameter screw portion 9 having a short dimension on the intermediate collar portion 2 side and a long-diameter screw portion having a long dimension continuous to the tip side of the large-diameter screw portion 9. 10 is formed in a stepped shape, and by providing the large-diameter threaded portion 9, a tensile strength of 5000 kg / f or more can be secured, and breakage or bending of the fixed threaded portion 3 can be prevented. It can be done.

すなわち、前記細径ねじ部10の径D1が、例えば6.0〜7.6mm程度であるとすると、前記太径ねじ部9の径D2は、8.0〜9.0mm程度に設定されており、また前記細径ねじ部10の長さL1が、例えば8.0〜10.0mm程度であるとすると、前記太径ねじ部9の長さL2は、4.0〜6.0mm程度に設定され、細径ねじ部10の長さL1が、太径ねじ部9の長さL2の1.5〜2.5倍程度に設定されている。   That is, if the diameter D1 of the small-diameter screw portion 10 is about 6.0 to 7.6 mm, for example, the diameter D2 of the large-diameter screw portion 9 is set to about 8.0 to 9.0 mm. If the length L1 of the small diameter screw portion 10 is about 8.0 to 10.0 mm, for example, the length L2 of the large diameter screw portion 9 is about 4.0 to 6.0 mm. The length L1 of the small-diameter screw portion 10 is set to about 1.5 to 2.5 times the length L2 of the large-diameter screw portion 9.

また、前記細径ねじ部10のピッチP1が、例えば1.0〜1.5mm程度であるとすると、前記太径ねじ部9のピッチP2は、1.5〜2.5mm程度に設定され、太径ねじ部9のピッチP2の方が、細径ねじ部10のピッチP1よりも広く設定され、かつ2.5倍以下の値に設定されている。   Further, if the pitch P1 of the small-diameter screw portion 10 is about 1.0 to 1.5 mm, for example, the pitch P2 of the large-diameter screw portion 9 is set to about 1.5 to 2.5 mm, The pitch P2 of the large-diameter screw portion 9 is set wider than the pitch P1 of the small-diameter screw portion 10, and is set to a value of 2.5 times or less.

一方、前記下穴6は、図1に示すように、太径部11と細径部12と皿もみ部13とから、前記固定ねじ部3に符合する段付き穴状に形成されており、この下穴6は、図2に示すように、太径ドリル部14と細径ドリル部15と皿もみ部16とを有するドリル7を用いることにより、1回の穴穿け作業で形成されるようになっている。   On the other hand, as shown in FIG. 1, the pilot hole 6 is formed in a stepped hole shape that matches the fixing screw portion 3 from the large diameter portion 11, the small diameter portion 12, and the countersunk portion 13. As shown in FIG. 2, the pilot hole 6 is formed by one drilling operation by using a drill 7 having a large diameter drill portion 14, a small diameter drill portion 15, and a countersunk portion 16. It has become.

なお、この下穴6は、図2に示す特殊なドリル7を用いず、通常のドリルを用い複数回の作業に分けて穿設するようにしてもよいことは云うまでもない。   Needless to say, the pilot hole 6 may be drilled in a plurality of operations using a normal drill without using the special drill 7 shown in FIG.

次に、本実施の形態の作用について説明する。
連結ねじ金具1の取付け面5への取付けに際しては、まず取付け面5に、下穴6を穿設するとともに、この下穴6に、固定ねじ部3を強制的にねじ込む。これにより、連結ねじ金具1は、中間鍔部2および取付けねじ部4を取付け面5外に露出させた状態で、取付け面5に強固に取付けられる。そこで、取付けねじ部4に、矢板控金具等の部材を螺装連結する。
Next, the operation of the present embodiment will be described.
When attaching the connection screw fitting 1 to the attachment surface 5, first, a pilot hole 6 is drilled in the attachment surface 5, and the fixing screw portion 3 is forcibly screwed into the pilot hole 6. Thereby, the connecting screw fitting 1 is firmly attached to the attachment surface 5 in a state where the intermediate flange portion 2 and the attachment screw portion 4 are exposed outside the attachment surface 5. Therefore, a member such as a sheet pile bracket is screwed and connected to the mounting screw portion 4.

ところで、連結ねじ金具1を必要以上の力で強く締付けた場合、あるいは取付けねじ部4にその軸線方向に交叉する方向から外力が加わった場合には、固定ねじ部3の中間鍔部2側の端部に破断や曲がり等が生じるのが通例である。   By the way, when the connecting screw fitting 1 is strongly tightened with a force more than necessary, or when an external force is applied to the mounting screw portion 4 from the direction intersecting in the axial direction, It is customary for the end to break or bend.

ところが、本実施の形態においては、この部分に径の大きな太径ねじ部9が配されていて太くなっているので、固定ねじ部3に破断や曲がり等が生じるおそれがない。   However, in the present embodiment, since the large-diameter screw portion 9 having a large diameter is disposed in this portion and is thick, there is no possibility that the fixing screw portion 3 is broken or bent.

一方、固定ねじ部3を全長に亘って太径にした場合には、前記破断や曲がり等は防止できるが、径を太くした分だけ、下穴6にねじ込む際の摩擦抵抗が大きくなって高温の摩擦熱が発生し、この摩擦熱でねじ山がへたって下穴6へのねじ込みが不可能,あるいは困難となり、ねじ込み作業に時間がかかって作業者の労力負担が増大することになるが、本実施の形態においては、太径ねじ部9の長さL2が4.0〜6.0mm程度に限定されているので、前述のような不具合が生じるおそれはない。   On the other hand, when the fixing screw portion 3 has a large diameter over its entire length, the breakage and bending can be prevented, but the frictional resistance when screwing into the pilot hole 6 increases as the diameter increases, resulting in a high temperature. The frictional heat is generated, and the screw thread sags due to this frictional heat, making it impossible or difficult to screw into the pilot hole 6, and it takes time for the screwing work, increasing the labor burden on the operator. In the present embodiment, since the length L2 of the large diameter screw portion 9 is limited to about 4.0 to 6.0 mm, there is no possibility that the above-described problems occur.

また、太径ねじ部9のねじ山のピッチP2は、細径ねじ部10のねじ山のピッチP1よりも広く設定されているので、連結ねじ金具1に軸方向の引張力が作用した際に、より大きな耐力が得られ、引張強度を向上させることができる。   Further, since the thread pitch P2 of the large-diameter threaded portion 9 is set wider than the thread pitch P1 of the small-diameter threaded portion 10, when an axial tensile force acts on the connecting screw fitting 1, More yield strength can be obtained and the tensile strength can be improved.

すなわち、太径ねじ部9を設けることにより、細径ねじ部10のみで固定ねじ部3を構成した場合よりも、周長が長くなった分だけ大きな引張強度を得ることができるが、太径ねじ部9のピッチP2が狭い場合には、図3に示すように、下穴6が太径ねじ部9に喰い込んでいる部分K1の形状が断面三角形状となり、三角形部分の底辺の長さも短くなる。このため、連結ねじ金具1に軸方向の大きな引張力が作用すると、太径ねじ部9に喰い込んでいる部分K1が、三角形の底辺の部分から千切れた状態となって、固定ねじ部3が下穴6から抜け出すおそれがある。   That is, by providing the large-diameter threaded portion 9, it is possible to obtain a larger tensile strength by the length of the circumference than when the fixed threaded portion 3 is configured only by the small-diameter threaded portion 10. When the pitch P2 of the threaded portion 9 is narrow, as shown in FIG. 3, the shape of the portion K1 where the pilot hole 6 bites into the large-diameter threaded portion 9 is triangular, and the length of the bottom of the triangular portion is also Shorter. For this reason, when a large tensile force in the axial direction acts on the connecting screw fitting 1, the portion K <b> 1 biting into the large-diameter screw portion 9 is cut off from the bottom portion of the triangle, and the fixing screw portion 3. May come out of the pilot hole 6.

これに対して、太径ねじ部9のピッチP2が広い場合には、図4に示すように、下穴6が太径ねじ部9に喰い込んでいる部分K2の形状が断面台形状となり、台形部分の下底の長さも長くなる。このため、連結ねじ金具1に軸方向の大きな引張力が作用しても、太径ねじ部9に喰い込んでいる部分K2が、台形の下底部分から千切れることがなく、固定ねじ部3が下穴6から抜け出すおそれがなくなる。   On the other hand, when the pitch P2 of the large-diameter screw portion 9 is wide, as shown in FIG. 4, the shape of the portion K2 where the pilot hole 6 bites into the large-diameter screw portion 9 is a trapezoidal cross section, The length of the bottom of the trapezoidal part is also increased. For this reason, even if a large axial tensile force acts on the connecting screw fitting 1, the portion K2 biting into the large-diameter screw portion 9 does not break from the lower bottom portion of the trapezoid, and the fixing screw portion 3 There is no risk of getting out of the pilot hole 6.

以上のことから、太径ねじ部9のピッチP2は、広い方がよいことになるが、ピッチP2が広過ぎると、太径ねじ部9のねじ山のターン数が少なくなり過ぎて好ましくない。このため、太径ねじ部9のねじ山のピッチP2は、細径ねじ部10のねじ山のピッチP1の2.5倍以下の値に設定することが好ましい。   From the above, it is better that the pitch P2 of the large-diameter screw portion 9 is wide. However, if the pitch P2 is too large, the number of turns of the thread of the large-diameter screw portion 9 is undesirably reduced. For this reason, it is preferable to set the thread pitch P2 of the large-diameter threaded portion 9 to a value not more than 2.5 times the thread pitch P1 of the small-diameter threaded portion 10.

しかして、本実施の形態においては、固定ねじ部3を、太径ねじ部9と細径ねじ部10とからなる段付き状のタッピングねじで形成しているので、大きな引張強度を得ることができるとともに、固定ねじ部3の破断や曲がり等も防止でき、しかもねじ山がへたったり、ねじ込み作業に時間がかかって、作業者の労力負担が増大すると云ったおそれもない。   Thus, in the present embodiment, the fixing screw portion 3 is formed of a stepped tapping screw composed of the large-diameter screw portion 9 and the small-diameter screw portion 10, so that a high tensile strength can be obtained. In addition, the fixing screw part 3 can be prevented from being broken or bent, and there is no fear that the thread is sagged or the screwing operation takes time, increasing the labor burden on the operator.

図5は、本発明の第2の実施の形態を示すもので、前記第1の実施の形態における太径ねじ部9に代え、太径ねじ部19を用いるようにしたものである。   FIG. 5 shows a second embodiment of the present invention, in which a large-diameter screw portion 19 is used in place of the large-diameter screw portion 9 in the first embodiment.

すなわち、前記太径ねじ部19は、図5に示すように、1〜2ターン程度の大径ねじ山部19aと、2〜3ターン程度の小径ねじ山部19bとで構成されており、大径ねじ山部19aの径D3は、8.0〜9.2mm程度に設定されているとともに、小径ねじ山部19bの径D4は、7.8〜8.5mm程度に設定されている。
なお、その他の点については、前記第1の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIG. 5, the large-diameter screw portion 19 is composed of a large-diameter screw thread portion 19a having about 1 to 2 turns and a small-diameter screw thread portion 19b having about 2 to 3 turns. The diameter D3 of the diameter thread 19a is set to about 8.0 to 9.2 mm, and the diameter D4 of the small diameter thread 19b is set to about 7.8 to 8.5 mm.
Other points are the same as those in the first embodiment, and the operation is also the same.

しかして、太径ねじ部19が、大径ねじ山部19aと小径ねじ山部19bとで構成されているので、太径ねじ部19のねじ山のピッチを、前記第1の実施の形態における太径ねじ部9のピッチP2よりも多少狭くしても、ほぼ同様の効果が期待できる。   Since the large-diameter thread portion 19 is composed of the large-diameter thread portion 19a and the small-diameter thread portion 19b, the thread pitch of the large-diameter thread portion 19 is set according to the first embodiment. Even if it is slightly narrower than the pitch P2 of the large-diameter threaded portion 9, substantially the same effect can be expected.

図6は、本発明の第3の実施の形態を示すもので、前記第1の実施の形態における太径ねじ部9に代え、太径ねじ部29を用いるようにしたものである。   FIG. 6 shows a third embodiment of the present invention, in which a large-diameter screw portion 29 is used instead of the large-diameter screw portion 9 in the first embodiment.

すなわち、前記太径ねじ部29は、図6に示すように、中間鍔部2から細径ねじ部10に向かって、ねじ山の径が次第に縮径するテーパ状に形成されており、その径は、7.8〜9.2mm程度の範囲内で任意に決められるようになっている。
なお、その他の点については、前記第1の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIG. 6, the large-diameter screw portion 29 is formed in a tapered shape in which the diameter of the thread gradually decreases from the intermediate flange portion 2 toward the small-diameter screw portion 10. Is arbitrarily determined within a range of about 7.8 to 9.2 mm.
Other points are the same as those in the first embodiment, and the operation is also the same.

しかして、太径ねじ部29がテーパ状をなしているので、下穴6へのねじ込みが、前記第2の実施の形態における太径ねじ部19よりもスムースとなり、ねじ込み作業がより容易である。   Since the large-diameter threaded portion 29 is tapered, the screwing into the pilot hole 6 is smoother than the large-diameter threaded portion 19 in the second embodiment, and the screwing operation is easier. .

図7(a),(b)は、本発明の第4の実施の形態を示すもので、前記第1の実施の形態における中間鍔部2に代え、中間鍔部32を用いるようにしたものである。   7 (a) and 7 (b) show a fourth embodiment of the present invention, in which an intermediate collar 32 is used instead of the intermediate collar 2 in the first embodiment. It is.

すなわち、前記中間鍔部32は、図7(a),(b)に示すように、大径の円板状に形成されており、その取付けねじ部4側の面には、例えば六角ナット状をなす工具掛け部33が設けられている。
なお、その他の点については、前記第1の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIGS. 7 (a) and 7 (b), the intermediate flange portion 32 is formed in a large-diameter disk shape, and the mounting screw portion 4 side surface has, for example, a hexagonal nut shape. A tool hanging portion 33 is provided.
Other points are the same as those in the first embodiment, and the operation is also the same.

しかして、大径の円板状をなす中間鍔部32を用いるようにしているので、固定ねじ部3を下穴6にねじ込んだ際に、取付け面5と中間鍔部32との接触面積を拡大することができ、その分だけ曲げに対する耐力を向上させることができる。   Since the intermediate flange 32 having a large-diameter disk shape is used, the contact area between the mounting surface 5 and the intermediate flange 32 when the fixing screw 3 is screwed into the pilot hole 6 is increased. It can be enlarged, and the resistance to bending can be improved accordingly.

図8(a),(b)は、本発明の第5の実施の形態を示すもので、前記第4の実施の形態における工具掛け部33に代え、工具掛け部43を用いるようにしたものである。   8 (a) and 8 (b) show a fifth embodiment of the present invention, in which a tool hook 43 is used instead of the tool hook 33 in the fourth embodiment. It is.

すなわち、前記工具掛け部43は、図8(a),(b)に示すように、取付けねじ部4の外周部に軸方向に設けられた4本の凹溝で形成されており、これら各凹溝に符合する凸条を備えた筒状の工具を用いることにより、連結ねじ金具1を操作できるようになっている。
なお、その他の点については、前記第4の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIGS. 8 (a) and 8 (b), the tool hook portion 43 is formed by four concave grooves provided in the axial direction on the outer peripheral portion of the mounting screw portion 4. The connecting screw fitting 1 can be operated by using a cylindrical tool provided with a ridge that matches the groove.
In addition, about another point, it has the same structure as the said 4th Embodiment, and an effect | action is also the same.

しかして、この工具掛け部43を用いることにより、取付けねじ部4に螺装される部材の端部を、中間鍔部32に密着させることができ、また連結ねじ金具1全体の長さを長くしないで、工具掛け部43を設けることができる。   Thus, by using this tool hook portion 43, the end portion of the member screwed to the mounting screw portion 4 can be brought into close contact with the intermediate collar portion 32, and the entire length of the connecting screw fitting 1 is increased. The tool hanger 43 can be provided without.

図9(a),(b)は、本発明の第6の実施の形態を示すもので、前記第5の実施の形態における工具掛け部43に代え、工具掛け部53を用いるようにしたものである。   FIGS. 9A and 9B show a sixth embodiment of the present invention, in which a tool hook 53 is used instead of the tool hook 43 in the fifth embodiment. It is.

すなわち、前記工具53は、図9(a),(b)に示すように、取付けねじ部4の先端面に設けた六角穴部で形成されており、筒体の底部に工具掛け部53に符合する六角棒状の突起を有する工具を、取付けねじ部4に装着することにより、簡単に操作できるようになっている。
なお、その他の点については、前記第5の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIGS. 9A and 9B, the tool 53 is formed by a hexagonal hole provided in the distal end surface of the mounting screw portion 4, and the tool hook 53 is attached to the bottom of the cylinder. By attaching a tool having a matching hexagonal bar-like projection to the mounting screw portion 4, the tool can be easily operated.
In addition, about another point, it has the same structure as the said 5th Embodiment, and an effect | action is also the same.

しかして、この工具掛け部53の場合には、取付けねじ部4に欠損が生じないので、取付けねじ部4の連結強度が低下すると云った不具合がない。   Therefore, in the case of this tool hook portion 53, since there is no defect in the attachment screw portion 4, there is no problem that the connection strength of the attachment screw portion 4 is lowered.

図10(a),(b)は、本発明の第7の実施の形態を示すもので、前記第6の実施の形態における工具掛け部53に代え、工具掛け部63を用いるようにしたものである。   10 (a) and 10 (b) show a seventh embodiment of the present invention, in which a tool hook 63 is used instead of the tool hook 53 in the sixth embodiment. It is.

すなわち、前記工具掛け部63は、図10(a),(b)に示すように、取付けねじ部4の先端面に設けた六角棒部で形成されており、この工具掛け部63に工具を装着することにより、簡単に操作できるようになっている。
なお、その他の点については、前記第6の実施の形態と同一構成となっており、作用も同一である。
That is, as shown in FIGS. 10A and 10B, the tool hook portion 63 is formed by a hexagonal bar portion provided on the tip surface of the mounting screw portion 4, and a tool is put on the tool hook portion 63. By attaching it, it can be easily operated.
In addition, about another point, it has the same structure as the said 6th Embodiment, and an effect | action is also the same.

しかして、この工具掛け部63の場合には、前記第6の実施の形態における工具掛け部53よりも加工が容易であるので、コストダウンを図ることができる。   Therefore, in the case of this tool hook portion 63, since the processing is easier than the tool hook portion 53 in the sixth embodiment, the cost can be reduced.

以上のように、本発明に係る連結ねじ金具1は、破断や曲がり等を生じさせずに、大きな引張強度を得ることができる金具として有用であり、特に型枠を保持する矢板控金具を取付け面5に取付ける際に用いる金具として適している。   As described above, the connecting screw fitting 1 according to the present invention is useful as a fitting capable of obtaining a large tensile strength without causing breakage or bending, and in particular, is attached with a sheet pile bracket that holds a formwork. It is suitable as a metal fitting used when attaching to the surface 5.

本発明の第1の実施の形態に係る連結ねじ金具およびこの連結ねじ金具が装着される下穴を示す説明図である。It is explanatory drawing which shows the connecting screw metal fitting which concerns on the 1st Embodiment of this invention, and the pilot hole by which this connecting screw metal fitting is mounted | worn. 図1の下穴を穿設するために用いられる特殊構造のドリルを示す説明図である。It is explanatory drawing which shows the drill of the special structure used in order to drill the prepared hole of FIG. 太径ねじ部のねじ山ピッチが狭い場合における下穴の喰い込み状態を示す説明図である。It is explanatory drawing which shows the biting state of the prepared hole in case the thread pitch of a large diameter thread part is narrow. 太径ねじ部のねじ山ピッチが広い場合における下穴の喰い込み状態を示す説明図である。It is explanatory drawing which shows the biting state of the prepared hole in case the thread pitch of a large diameter thread part is wide. 本発明の第2の実施の形態に係る連結ねじ金具を示す説明図である。It is explanatory drawing which shows the connection screw metal fitting which concerns on the 2nd Embodiment of this invention. 本発明の第3の実施の形態に係る連結ねじ金具を示す説明図である。It is explanatory drawing which shows the connection screw metal fitting which concerns on the 3rd Embodiment of this invention. (a)は本発明の第4の実施の形態に係る連結ねじ金具を示す説明図、(b)は(a)の左側面図である。(A) is explanatory drawing which shows the connection screw metal fitting which concerns on the 4th Embodiment of this invention, (b) is a left view of (a). (a)は本発明の第5の実施の形態に係る連結ねじ金具を示す説明図、(b)は(a)の左側面図である。(A) is explanatory drawing which shows the connection screw metal fitting which concerns on the 5th Embodiment of this invention, (b) is a left view of (a). (a)は本発明の第6の実施の形態に係る連結ねじ金具を示す説明図、(b)は(a)の左側面図である。(A) is explanatory drawing which shows the connection screw metal fitting which concerns on the 6th Embodiment of this invention, (b) is a left view of (a). (a)は本発明の第7の実施の形態に係る連結ねじ金具を示す説明図、(b)は(a)の左側面図である。(A) is explanatory drawing which shows the connection screw metal fitting which concerns on the 7th Embodiment of this invention, (b) is a left view of (a). 従来の連結ねじ金具を示す説明図である。It is explanatory drawing which shows the conventional connection screw metal fitting.

符号の説明Explanation of symbols

1,100 連結ねじ金具
2,32,101 中間鍔部
3,102 固定ねじ部
4,103 取付けねじ部
5,104 取付け面
6,105 下穴
7 ドリル
8 工具
9,19,29 太径ねじ部
10 細径ねじ部
11 太径部
12 細径部
13,16 皿もみ部
14 太径ドリル部
15 細径ドリル部
19a 大径ねじ山部
19b 小径ねじ山部
33,43,53,63 工具掛け部
D1,D2,D3,D4 径
L1,L2 長さ
P1,P2 ピッチ
K1,K2 喰い込んでいる部分
DESCRIPTION OF SYMBOLS 1,100 Connection thread metal fitting 2,32,101 Intermediate collar part 3,102 Fixing screw part 4,103 Mounting screw part 5,104 Mounting surface 6,105 Pilot hole 7 Drill 8 Tool 9, 19, 29 Large diameter thread part 10 Small diameter thread part 11 Large diameter part 12 Small diameter part 13, 16 Countersunk part 14 Large diameter drill part 15 Small diameter drill part 19a Large diameter thread part 19b Small diameter thread part 33, 43, 53, 63 Tool hook part D1 , D2, D3, D4 Diameter L1, L2 Length P1, P2 Pitch K1, K2 Biting part

Claims (11)

中間鍔部と;中間鍔部の一側から突出し、壁や柱等の金属製の取付け面に取付けられる固定ねじ部と;中間鍔部の他側から突出し、雌ねじを有する部材が螺装連結される取付けねじ部と;を具備する連結ねじ金具において、前記固定ねじ部は、中間鍔部側の寸法の短い太径ねじ部と、太径ねじ部の先端側に連続する寸法の長い細径ねじ部とを備えていることを特徴とする連結ねじ金具。   An intermediate collar; a fixing screw projecting from one side of the intermediate collar and attached to a metal mounting surface such as a wall or a column; a member projecting from the other side of the intermediate collar and having a female screw is screwed and connected The fixing screw part includes a large-diameter screw part having a short dimension on the intermediate flange side and a long-diameter screw having a long dimension continuing to the tip side of the large-diameter thread part. And a connecting screw fitting characterized by comprising a portion. 細径ねじ部は、太径ねじ部の1.5〜2.5倍の長さに設定されていることを特徴とする請求項1記載の連結ねじ金具。   The connecting screw fitting according to claim 1, wherein the small-diameter screw portion is set to a length 1.5 to 2.5 times that of the large-diameter screw portion. 太径ねじ部は、そのねじ山のピッチが細径ねじ部のねじ山のピッチよりも広く設定されていることを特徴とする請求項1または2記載の連結ねじ金具。   The connecting screw fitting according to claim 1 or 2, wherein the large-diameter thread portion has a thread pitch set wider than that of the small-diameter thread portion. 太径ねじ部のねじ山のピッチは、細径ねじ部のねじ山のピッチの2.5倍以下に設定されていることを特徴とする請求項3記載の連結ねじ金具。   4. The connecting screw fitting according to claim 3, wherein the thread pitch of the large-diameter thread portion is set to 2.5 times or less of the thread pitch of the small-diameter thread portion. 太径ねじ部は、中間鍔部側の任意ターンの大径ねじ山部と、大径ねじ山部と細径ねじ部との間に配置される複数ターンの小径ねじ山部とを有していることを特徴とする請求項1,2,3または4記載の連結ねじ金具。   The large-diameter thread portion has a large-diameter thread portion of an arbitrary turn on the intermediate flange side, and a multi-turn small-diameter thread portion disposed between the large-diameter thread portion and the small-diameter thread portion. The connecting screw fitting according to claim 1, 2, 3, or 4, characterized in that: 太径ねじ部は、中間鍔部から細径ねじ部に向かって、ねじ山の径が次第に縮径するテーパ状をなしていることを特徴とする請求項1,2,3または4記載の連結ねじ金具。   The connection according to claim 1, 2, 3 or 4, wherein the large-diameter screw portion has a tapered shape in which the diameter of the thread gradually decreases from the intermediate flange portion toward the small-diameter screw portion. Screw bracket. 中間鍔部は、その外周部に工具掛け部を有していることを特徴とする請求項1,2,3,4,5または6記載の連結ねじ金具。   The connecting screw fitting according to claim 1, 2, 3, 4, 5 or 6, wherein the intermediate collar portion has a tool hook portion on an outer peripheral portion thereof. 中間鍔部は、その取付けねじ部側の面に工具掛け部を有していることを特徴とする請求項1,2,3,4,5または6記載の連結ねじ金具。   The connecting threaded fitting according to claim 1, 2, 3, 4, 5 or 6, wherein the intermediate flange has a tool hook on the surface of the mounting screw. 取付けねじ部は、その先端部に凹状または凸状の工具掛け部を有していることを特徴とする請求項1,2,3,4,5または6記載の連結ねじ金具。   The connecting screw fitting according to claim 1, 2, 3, 4, 5 or 6, wherein the mounting screw portion has a concave or convex tool hook at a tip portion thereof. 取付けねじ部は、その外周部に凹状の工具掛け部を有していることを特徴とする請求項1,2,3,4,5または6記載の連結ねじ金具。   The connecting screw fitting according to claim 1, 2, 3, 4, 5 or 6, wherein the mounting screw portion has a concave tool hook portion on an outer peripheral portion thereof. 太径ねじ部および細径ねじ部は、タッピングねじで形成されるとともに、取付け面には、太径ねじ部および細径ねじ部に符合する段付き状の下穴が穿設され、固定ねじ部は、この下穴に強制的にねじ込まれることを特徴とする請求項1,2,3,4,5,6,7,8,9または10記載の連結ねじ金具。   The large-diameter screw portion and the small-diameter screw portion are formed by tapping screws, and a stepped pilot hole that matches the large-diameter screw portion and the small-diameter screw portion is drilled on the mounting surface. The connecting screw fitting according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the screw is forcibly screwed into the prepared hole.
JP2003318131A 2003-09-10 2003-09-10 Connecting screw fitting Pending JP2005083523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003318131A JP2005083523A (en) 2003-09-10 2003-09-10 Connecting screw fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003318131A JP2005083523A (en) 2003-09-10 2003-09-10 Connecting screw fitting

Publications (1)

Publication Number Publication Date
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ID=34417496

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012417A1 (en) * 2005-07-28 2007-02-01 Petras Und Guggumos Gbr Thread-cutting concrete anchor
JP2009041583A (en) * 2007-08-06 2009-02-26 Nabtesco Corp Disc pad
JP2009074674A (en) * 2007-08-28 2009-04-09 Teruo Nakagami Fastening member
JP2015105755A (en) * 2013-11-29 2015-06-08 台湾固而美工業股▲ふん▼有限公司 Fastener for wheel
KR102152343B1 (en) * 2019-08-08 2020-09-04 (주)삼일육스틸 Thread bolt for fixing the grating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012417A1 (en) * 2005-07-28 2007-02-01 Petras Und Guggumos Gbr Thread-cutting concrete anchor
JP2009041583A (en) * 2007-08-06 2009-02-26 Nabtesco Corp Disc pad
JP2009074674A (en) * 2007-08-28 2009-04-09 Teruo Nakagami Fastening member
JP2015105755A (en) * 2013-11-29 2015-06-08 台湾固而美工業股▲ふん▼有限公司 Fastener for wheel
KR102152343B1 (en) * 2019-08-08 2020-09-04 (주)삼일육스틸 Thread bolt for fixing the grating

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