JP5265938B2

JP5265938B2 - Fixture

Info

Publication number: JP5265938B2
Application number: JP2008021689A
Authority: JP
Inventors: 周一森
Original assignee: Kubota Matsushitadenko Exterior Works Ltd; KMEW Co Ltd
Current assignee: KMEW Co Ltd
Priority date: 2008-01-31
Filing date: 2008-01-31
Publication date: 2013-08-14
Anticipated expiration: 2028-01-31
Also published as: JP2009180040A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing implement for fixing a member to be fitted, having a fixing hole, to an underlayer material by which a head part of the fixing implement is prevented from crushing when the fixing implement is driven by using a tool, and the head part is inhibited from projecting from the surface of the member to be fitted. <P>SOLUTION: The fixing implement 1 is used to fix the member to be fitted 9, having the fixing hole 10 penetrating in the direction of the thickness, to the underlayer material 11. The fixing implement 1 comprises a screw part 2, a connecting part 3 formed at a rear end of the screw part 2, and a head part 4 formed at a rear end of the connecting part 3. The screw part 2 is provided with a threaded part 6 having a screw thread 5 formed on the front end side. The screw part has a cutting part 8 having a reamer 7 on the side of the head part 4. The outer diameter (a) of the head part 4, the outer diameter b of the cutting part 8, and the largest outer diameter c of the connecting part 3 satisfy the relation of a>b≥c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、スレート屋根材等の被着材を、野地等の下地材に固定するために用いられる固定具に関する。 The present invention relates to a fixture used for fixing an adherend such as a slate roofing material to a base material such as a field.

従来、薄板状の屋根材等の被着材９を、野地等の下地材１１に固定するにあたっては、各種のビスやねじ等の固定具が使用されている。 Conventionally, in order to fix the adherend 9 such as a thin plate-like roof material to a base material 11 such as a field, various fixing tools such as screws and screws are used.

図３に示す固定具１’は、外周にねじ山５が形成されたねじ部２と、ねじ部２の上端に形成されている連結部３と、連結部３の上端端に形成されている頭部４とを備える。頭部４の上端面にはプラス溝等のような嵌入凹部が形成されている。この嵌入凹部は、固定具１’をドライバービット等の工具でねじ込む際にこの工具を嵌入させ、工具と固定具１’との間に抵抗を生じさせて工具から固定具１’へ回転応力を伝達するために設ける。 A fixing tool 1 ′ shown in FIG. 3 is formed at a screw portion 2 having a thread 5 formed on the outer periphery, a connecting portion 3 formed at the upper end of the screw portion 2, and an upper end of the connecting portion 3. And a head 4. An insertion recess such as a plus groove is formed on the upper end surface of the head 4. This insertion recess inserts the tool when the fixing tool 1 ′ is screwed with a tool such as a driver bit, and creates resistance between the tool and the fixing tool 1 ′, thereby causing rotational stress from the tool to the fixing tool 1 ′. Provided for transmission.

工具を用いて固定具１’をねじ込む際、下地材１１の材質が固い場合には、工具と嵌入凹部との間に働く抵抗によって頭部に潰れ（なめ）が発生しやすくなり、また固定具１’が斜めにねじ込まれやすくなるという問題もある。そこで、ねじ部２と頭部４の間に連結部３を設けることで、嵌入凹部を頭部４から連結部３内にまで凹入することを可能とし、深い嵌入凹部を形成して頭部４の潰れを防止している。また、頭部４は平坦な形状にして、被着材９からの頭部４の突出量を抑制している。 When the fixture 1 ′ is screwed with a tool, if the material of the base material 11 is hard, the head is liable to be crushed (licked) due to the resistance acting between the tool and the insertion recess, and the fixture There is also a problem that 1 'is easily screwed diagonally. Therefore, by providing the connecting portion 3 between the screw portion 2 and the head 4, the insertion recess can be inserted from the head 4 into the connection portion 3, and a deep insertion recess is formed to form the head. 4 is prevented from being crushed. Moreover, the head 4 is made into a flat shape, and the protrusion amount of the head 4 from the adherend 9 is suppressed.

また、固定具１にて下地材１１に固定される被着材９には、厚み方向に貫通する固定用孔１０が形成されている。被着材９を下地材１１に固定する際には、固定具１’のねじ部２を固定用孔１０に挿通した状態で、工具にて固定具１’を下地材１１にねじ込み、頭部４を固定用孔１０の周縁で係止する。このとき、連結部３が固定用孔１０に引っ掛かると、被着材９の上面から固定具１’の頭部４が突出してしまうことがある。 Further, a fixing hole 10 penetrating in the thickness direction is formed in the adherend 9 fixed to the base material 11 by the fixing tool 1. When fixing the adherend 9 to the base material 11, the fixing tool 1 ′ is screwed into the base material 11 with a tool while the screw portion 2 of the fixing tool 1 ′ is inserted into the fixing hole 10, and the head 4 is locked at the periphery of the fixing hole 10. At this time, when the connecting portion 3 is caught in the fixing hole 10, the head 4 of the fixture 1 ′ may protrude from the upper surface of the adherend 9.

このような頭部４の突出が生じると、固定具１’をねじ込んだ位置の平坦性が悪くなって外観が悪化してしまうという問題がある。また、固定具１’と固定用孔１０との間に隙間が生じることで固定用孔１０へ水が浸入しやすくなり、防水性が低下するという問題もある。 When such a protrusion of the head 4 occurs, there is a problem that the flatness at the position where the fixing device 1 ′ is screwed is deteriorated and the appearance is deteriorated. Further, since a gap is generated between the fixing tool 1 ′ and the fixing hole 10, it becomes easy for water to enter the fixing hole 10, and there is a problem that waterproofness is lowered.

また、例えば被着材９として屋根材を固定する場合には、固定具１’をねじ込んだ位置に更に別の屋根材を重ねると、頭部４の突出によって屋根材同士の間の隙間が大きくなってしまう。この場合、屋根材同士の間に水が浸入することで防水性が低下するおそれがある。また、この頭部４の突出は踏み割れの原因にもなる。このような踏み割れが生じると、屋根材の外観の悪化を招くと共に割れた箇所から水が浸入して防水性が低下してしまう。 Further, for example, when a roof material is fixed as the adherend 9, if another roof material is further stacked at the position where the fixing tool 1 ′ is screwed, a gap between the roof materials becomes large due to the protrusion of the head 4. turn into. In this case, there is a possibility that the waterproofness may be lowered due to water entering between the roofing materials. Further, the protrusion of the head 4 causes a stepping crack. When such a step crack occurs, the appearance of the roofing material is deteriorated and water enters from the cracked portion, resulting in a decrease in waterproofness.

そこで、図示のように連結部３の外周にフレキ１３と呼ばれる凹凸を形成し、固定具１’のねじ込みの際にこのフレキ１３で固定用孔１０の内面を切削することで、頭部４の被着材９からの突出や、固定具１’と固定用孔１０との間の隙間の発生を防止することも提案されている（特許文献１参照）。
特開２００４−６０３５６号公報 Therefore, as shown in the figure, an unevenness called a flex 13 is formed on the outer periphery of the connecting portion 3, and the inner surface of the fixing hole 10 is cut with the flex 13 when the fixing tool 1 ′ is screwed, so that the head 4 It has also been proposed to prevent the protrusion from the adherend 9 and the occurrence of a gap between the fixture 1 ′ and the fixing hole 10 (see Patent Document 1).
JP 2004-60356 A

しかし、上記のように固定具１’の連結部３にフレキ１３を設けると、図３（ｂ）に示すようにフレキ１３による切削により生じた切削屑１４が固定用孔１０の開口縁と固定具１’の頭部４との間に溜まりやすくなる。この場合、切削屑１４の厚みの分だけ固定具１’が被着材９の表面から突出してしまうという問題がある。また、固定具１’をねじ込んだ後、切削屑１４が除去されると、固定用孔１０の開口縁と固定具１’の頭部４との間に隙間が生じ、この隙間に水が浸入するおそれがある。 However, when the flexible portion 13 is provided in the connecting portion 3 of the fixture 1 ′ as described above, the cutting waste 14 generated by cutting by the flexible portion 13 is fixed to the opening edge of the fixing hole 10 as shown in FIG. It becomes easy to collect between head 4 of ingredient 1 '. In this case, there is a problem that the fixture 1 ′ protrudes from the surface of the adherend 9 by the thickness of the cutting waste 14. Further, when the cutting waste 14 is removed after the fixing tool 1 ′ is screwed, a gap is formed between the opening edge of the fixing hole 10 and the head 4 of the fixing tool 1 ′, and water enters the gap. There is a risk.

本発明は上記の点に鑑みて為されたものであり、固定用孔を有する被着材を下地材に固定するための固定具であって、工具を用いて固定具をねじ込む際の頭部の潰れの発生を防止すると共に、被着材の表面からの固定具の頭部の突出を抑制することができる固定具を提供することを目的とする。 The present invention has been made in view of the above points, and is a fixture for fixing an adherend having a fixing hole to a base material, and a head when the fixture is screwed in using a tool An object of the present invention is to provide a fixture that can prevent the occurrence of crushing and can suppress the protrusion of the head of the fixture from the surface of the adherend.

本発明は、厚み方向に貫通する固定用孔１０を有する被着材９を下地材１１に固定するための固定具１であって、ねじ部２、ねじ部２の上端に形成された連結部３、並びに連結部３の上端に形成された頭部４を具備し、前記ねじ部２には下端側にねじ山５が形成された螺合部６が設けられると共に、上端側にリーマー７が形成された切削部８が設けられ、
前記頭部４の外径ａ、前記切削部８の外径ｂ、及び前記連結部３の最大外径ｃが、ａ＞ｂ≧ｃの関係にあり、頭部４の外径ａと切削部８の外径ｂとの差が、２〜３ｍｍの範囲であることを特徴とする。 The present invention is a fixture 1 for fixing an adherend 9 having a fixing hole 10 penetrating in the thickness direction to a base material 11, and includes a screw portion 2 and a connecting portion formed at the upper end of the screw portion 2. 3 and a head portion 4 formed at the upper end of the connecting portion 3. The screw portion 2 is provided with a screwing portion 6 having a screw thread 5 formed at the lower end side, and a reamer 7 at the upper end side. The formed cutting part 8 is provided,
Outer diameter a of the head 4, the outer diameter b of the cutting portion 8, and the maximum outer diameter c of the connecting portion 3, Ri near relation a> b ≧ c, and cutting the outer diameter a of the head 4 the difference between the outer diameter b of the part 8, characterized in range der Rukoto of 2 to 3 mm.

この場合、嵌入凹部１２を頭部４から連結部３内にまで凹入するように形成して、深い嵌入凹部１２を形成することができる。また、固定具１の嵌入凹部１２にドライバービット等の工具を嵌入し、この工具を操作して固定具１をねじ込むことで被着材９を下地材１１に固定する際、固定用孔１０の内径ｅが連結部３の最大外径ｃよりも小さい場合であっても、切削部８のリーマー７が固定用孔１０の内面を切削してこの固定用孔１０を拡張し、切削部８の外径ｂ以下の最大外径ｃを有する連結部３を固定用孔１０の内側に収めることができると共に、切削部８の外径ｂよりも大きい外径ａを有する頭部４を、切削部８によって拡大された固定用孔１０の開口に落ち込ませることなく、被着材９の表面に当接させることができる。また、切削部８のリーマー７による切削で生じた切削屑は固定用孔１０の内側に溜まり、頭部４の下面と被着材９の表面との間に切削屑が介在することが防止される。 In this case, the deep insertion recess 12 can be formed by forming the insertion recess 12 so as to be recessed from the head 4 into the connecting portion 3. Further, when a tool such as a screwdriver bit is inserted into the insertion recess 12 of the fixing tool 1 and the fixing tool 1 is screwed by operating this tool, the fixing hole 10 is fixed to the base material 11. Even when the inner diameter e is smaller than the maximum outer diameter c of the connecting portion 3, the reamer 7 of the cutting portion 8 cuts the inner surface of the fixing hole 10 to expand the fixing hole 10, and The connecting portion 3 having a maximum outer diameter c equal to or smaller than the outer diameter b can be accommodated inside the fixing hole 10, and the head 4 having an outer diameter a larger than the outer diameter b of the cutting portion 8 is provided as a cutting portion. The surface can be brought into contact with the surface of the adherend 9 without dropping into the opening of the fixing hole 10 enlarged by 8. Further, cutting waste generated by cutting by the reamer 7 of the cutting portion 8 is accumulated inside the fixing hole 10, and it is prevented that the cutting waste is interposed between the lower surface of the head 4 and the surface of the adherend 9. The

このとき、上記連結部３の最大外径ｃと上記螺合部６の外径ｄとが、ｃ≧ｄの関係にあることが好ましい。 At this time, it is preferable that the maximum outer diameter c of the connecting portion 3 and the outer diameter d of the screwing portion 6 have a relationship of c ≧ d.

このとき、上記切削部の外径ｂと上記螺合部の外径ｄとが、ｂ≧ｄの関係にあることが好ましい。 At this time, it is preferable that the outer diameter b of the cutting part and the outer diameter d of the screwing part have a relationship of b ≧ d.

また、上記頭部４の下面と、上記切削部８の下端位置との間の寸法ｆは、被着材９の厚み寸法９よりも小さいことが好ましい。 The dimension f between the lower surface of the head 4 and the lower end position of the cutting part 8 is preferably smaller than the thickness dimension 9 of the adherend 9.

この場合、固定具１で被着材９を下地材１１に固定する際、切削部８は固定用孔１０の内側に配置され、下地材１１が固定具１のねじ込み時にリーマー７によって切削されることがなくなり、リーマー７による下地材１１の切削によって固定具１の嵌入凹部１２と工具との間にかかる応力が増大することを防止することができる。 In this case, when fixing the adherend 9 to the base material 11 with the fixing tool 1, the cutting portion 8 is disposed inside the fixing hole 10, and the base material 11 is cut by the reamer 7 when the fixing tool 1 is screwed. Therefore, it is possible to prevent the stress applied between the insertion recess 12 of the fixture 1 and the tool from being increased by the cutting of the base material 11 by the reamer 7.

また、上記螺合部６の外径ｄと、上記固定用孔１０の内径ｅとは、略等しいことが好ましい。 The outer diameter d of the screwing portion 6 and the inner diameter e of the fixing hole 10 are preferably substantially equal.

この場合、固定具１を固定用孔１０から下地材１１に向けてねじ込む際に固定具１が傾くことを防止し、また螺合部６が固定用孔１０内で円滑に進むようにすることができる。 In this case, when the fixing tool 1 is screwed from the fixing hole 10 toward the base material 11, the fixing tool 1 is prevented from being inclined, and the screwing portion 6 is smoothly advanced in the fixing hole 10. Can do.

本発明によれば、固定具１で被着材９を下地材１１に固定する際、頭部４の潰れ（なめ）を抑制すると共に、被着材９における固定用孔１０の周縁に固定具１の頭部４を切削屑を介在させることなく当接させることができ、頭部４の突出による平坦性の低下や、固定具１と固定用孔１０との間の隙間の発生を抑制することができる。 According to the present invention, when fixing the adherend 9 to the base material 11 with the fixture 1, the crushing (licking) of the head 4 is suppressed, and the fixture is attached to the periphery of the fixing hole 10 in the adherend 9. 1 head 4 can be brought into contact without interposing cutting waste, and a reduction in flatness due to protrusion of head 4 and generation of a gap between fixture 1 and fixing hole 10 are suppressed. be able to.

以下、本発明の実施をするための最良の形態について説明する。 Hereinafter, the best mode for carrying out the present invention will be described.

図１に示す固定具１は、図２に示すように被着材９を下地材１１に固定するために用いられる。被着材９と下地材１１の構成は特に制限されないが、例えば被着材９としてはスレート屋根材等の建材を、下地材１１としては野地等の建物構造体を挙げることができる。 The fixture 1 shown in FIG. 1 is used to fix the adherend 9 to the base material 11 as shown in FIG. The structures of the adherend 9 and the base material 11 are not particularly limited. For example, the adherend 9 can be a building material such as a slate roof material, and the base material 11 can be a building structure such as a field.

この被着材９における、固定具１のねじ込み位置には、厚み方向に貫通する固定用孔１０が穿設されている。 A fixing hole 10 penetrating in the thickness direction is formed at a screwed position of the fixture 1 in the adherend 9.

固定具１は、ねじ部２（シャンク）、ねじ部２の上端に形成された連結部３、並びに連結部３の上端に形成された頭部４を具備する。 The fixture 1 includes a screw portion 2 (shank), a connecting portion 3 formed at the upper end of the screw portion 2, and a head 4 formed at the upper end of the connecting portion 3.

ねじ部２は棒状に形成され、このねじ部２の上端側には切削部８が、下端側には螺合部６が設けられている。螺合部６ではねじ部２の外周面にねじ山５が形成されている。また切削部８ではリーマー７が形成されている。 The screw portion 2 is formed in a rod shape, and a cutting portion 8 is provided on the upper end side of the screw portion 2 and a screwing portion 6 is provided on the lower end side. In the threaded portion 6, a thread 5 is formed on the outer peripheral surface of the threaded portion 2. A reamer 7 is formed at the cutting portion 8.

螺合部６のねじ山５は、複数条の弦巻線を持つ多条ねじであってもよく、またコーススレッドのように目の粗いねじ山５であっても良い。また、切削部８のリーマー７は固定具１のねじ込みの際に被着材９の固定用孔１０の内面を切削する機能を有する。リーマー７の形状は特に制限されないが、図示の例ではヒレ状のリーマー７がねじ部２と一体に複数形成されている。このとき、複数のリーマー７が、ねじ部２の外周面から外放射方向へ突出するように形成されている。 The thread 5 of the threaded portion 6 may be a multiple thread having a plurality of string windings, or may be a coarse thread 5 such as a coarse thread. Further, the reamer 7 of the cutting portion 8 has a function of cutting the inner surface of the fixing hole 10 of the adherend 9 when the fixing tool 1 is screwed. The shape of the reamer 7 is not particularly limited, but in the illustrated example, a plurality of fin-like reamers 7 are formed integrally with the screw portion 2. At this time, the plurality of reamers 7 are formed so as to protrude from the outer peripheral surface of the screw portion 2 in the outward radiation direction.

連結部３は、頭部４の下面とねじ部２の上端との間に形成されている。この連結部３は頭部４側からねじ部２側に向けて径が徐々に小さくなる円台錐形に形成されている。 The connecting portion 3 is formed between the lower surface of the head 4 and the upper end of the screw portion 2. The connecting portion 3 is formed in a truncated cone shape whose diameter gradually decreases from the head 4 side toward the screw portion 2 side.

頭部４は偏平な円盤状に形成されている。頭部４の厚みは適宜設定されるが、充分な強度を有すると共に頭部４の突出量を抑制するためには、前記厚みは０．８±０．２ｍｍの範囲が好ましい。この頭部４の上面には、ドライバービット等の工具が嵌入する嵌入凹部１２が形成されている。嵌入凹部１２としては、プラス溝、マイナス溝等の適宜のものが形成される。また、嵌入凹部１２は頭部４から連結部３内にまで凹入するように形成して、深い嵌入凹部１２を形成することができる。このため、ドライバービット等の工具を用いて固定具１をねじ込む際に頭部４が潰れる（なめる）のを防止することができる。 The head 4 is formed in a flat disk shape. The thickness of the head 4 is appropriately set, but the thickness is preferably in the range of 0.8 ± 0.2 mm in order to have sufficient strength and suppress the protrusion amount of the head 4. An insertion recess 12 into which a tool such as a driver bit is inserted is formed on the upper surface of the head 4. As the fitting recess 12, an appropriate one such as a plus groove or a minus groove is formed. In addition, the insertion recess 12 can be formed so as to be recessed from the head 4 into the connecting portion 3 to form a deep insertion recess 12. For this reason, it is possible to prevent the head 4 from being crushed (licked) when the fixing tool 1 is screwed in using a tool such as a driver bit.

また、この固定具１の頭部４、切削部８、連結部３及び螺合部６は、前記頭部４の外径ａ、切削部８の外径ｂ、及び連結部３の最大外径ｃが、ａ＞ｂ≧ｃの関係となるように形成される。またこのとき、上記連結部３の最大外径ｃと上記螺合部６の外径ｄとが、ｃ≧ｄの関係にあることが好ましく、特にｃ＞ｄの関係にあることが好ましい。 Further, the head 4, the cutting portion 8, the connecting portion 3, and the screwing portion 6 of the fixture 1 have an outer diameter a of the head 4, an outer diameter b of the cutting portion 8, and a maximum outer diameter of the connecting portion 3. c is formed such that a> b ≧ c. At this time, the maximum outer diameter c of the connecting portion 3 and the outer diameter d of the screwing portion 6 are preferably in a relationship of c ≧ d, and particularly preferably in a relationship of c> d.

ここで、頭部４の外径ａの値は適宜設定されるが、例えば８〜１０ｍｍの範囲とすることができる。 Here, the value of the outer diameter a of the head 4 is set as appropriate, but may be in the range of 8 to 10 mm, for example.

また、切削部８の外径ｂは、ねじ部２を中心とし、且つ切削部８（リーマー７）が内接する円筒の径に相当する。切削部８の外径ｂの値は適宜設定されるが、例えば４．２〜７．５ｍｍの範囲とすることができる。また、本発明の効果を充分に発揮するためには、頭部４の外径ａと切削部８の外径ｂとの差が、２〜３ｍｍの範囲であることが好ましい。 The outer diameter b of the cutting portion 8 corresponds to the diameter of a cylinder centered on the screw portion 2 and inscribed by the cutting portion 8 (reamer 7). Although the value of the outer diameter b of the cutting part 8 is set suitably, it can be made into the range of 4.2-7.5 mm, for example. Moreover, in order to fully demonstrate the effect of this invention, it is preferable that the difference of the outer diameter a of the head 4 and the outer diameter b of the cutting part 8 is the range of 2-3 mm.

また、連結部３の最大外径ｃは、図示の例では連結部３のうち頭部４に接する最も径が大きくなる部分における外径である。この最大外径ｃの値は適宜設定されるが、例えば５〜７ｍｍの範囲とすることができる。また、本発明の効果を充分に発揮するためには、切削部８の外径ｂと連結部３の最大外径ｃとの差が、０〜２ｍｍの範囲であることが好ましい。 In addition, the maximum outer diameter c of the connecting portion 3 is the outer diameter of the portion of the connecting portion 3 that contacts the head 4 and has the largest diameter in the illustrated example. The value of the maximum outer diameter c is set as appropriate, and can be in the range of 5 to 7 mm, for example. Moreover, in order to fully demonstrate the effect of this invention, it is preferable that the difference of the outer diameter b of the cutting part 8 and the largest outer diameter c of the connection part 3 is the range of 0-2 mm.

また、螺合部６の外径ｄは、ねじ部２を中心とし、且つ螺合部６（ねじ山５）が内接する円筒の径に相当する。この外径ｄの値は適宜設定されるが、例えば４〜４．２ｍｍの範囲とすることができる。また、本発明の効果を充分に発揮するためには、連結部３の最大外径ｃと螺合部６の外径ｄとの差が０〜２ｍｍの範囲であることが好ましい。 Further, the outer diameter d of the screwing portion 6 corresponds to the diameter of a cylinder centered on the screw portion 2 and inscribed by the screwing portion 6 (thread 5). The value of the outer diameter d is set as appropriate, but can be in the range of 4 to 4.2 mm, for example. Moreover, in order to fully demonstrate the effect of this invention, it is preferable that the difference of the maximum outer diameter c of the connection part 3 and the outer diameter d of the screwing part 6 is the range of 0-2 mm.

また、螺合部６の外径ｄは、被着材９に設けた固定用孔１０の内径ｅと略同一であることが好ましく、特に螺合部６の外径ｄと固定用孔１０の内径ｅとの差が−０．５〜＋０．２ｍｍの範囲であることが好ましい。この場合、固定具１を固定用孔１０から下地材１１に向けてねじ込む際に固定具１が傾くことを防止して、固定具１と固定用孔１０との間に隙間が生じることを防ぐと共に、螺合部６が固定用孔１０内で円滑に進むようにすることができる。 The outer diameter d of the screwing portion 6 is preferably substantially the same as the inner diameter e of the fixing hole 10 provided in the adherend 9, and in particular, the outer diameter d of the screwing portion 6 and the fixing hole 10. The difference from the inner diameter e is preferably in the range of −0.5 to +0.2 mm. In this case, when the fixing tool 1 is screwed from the fixing hole 10 toward the base material 11, the fixing tool 1 is prevented from being tilted, and a gap is not generated between the fixing tool 1 and the fixing hole 10. At the same time, the screwing portion 6 can be smoothly advanced in the fixing hole 10.

また、固定具１における頭部４の下面と切削部８の下端位置との間の寸法ｆを、被着材９の厚み寸法ｇよりも小さく形成することが好ましい。ここで、被着材９がスレート屋根材等の薄板状の屋根材である場合、被着材９の厚み寸法ｇは通常は約４．５〜７ｍｍの範囲に形成され、この場合、この被着材９の厚みよりも、頭部４の下面と切削部８の下端位置との間の寸法ｆが小さくなるようにする。 Moreover, it is preferable to form the dimension f between the lower surface of the head 4 and the lower end position of the cutting part 8 in the fixture 1 smaller than the thickness dimension g of the adherend 9. Here, when the adherend 9 is a thin roof material such as a slate roof material, the thickness dimension g of the adherend 9 is usually formed in a range of about 4.5 to 7 mm. The dimension f between the lower surface of the head 4 and the lower end position of the cutting portion 8 is made smaller than the thickness of the dressing 9.

上記構成を有する固定具１を用いた、下地材１１への被着材９の固定は、次のようにして行う（図２（ａ）（ｂ）参照）。まず、被着材９を下地材１１の表面に沿って配置する。この状態で、被着材９の固定用孔１０と固定具１のねじ部２の下端とを位置あわせした状態で、固定具１の嵌入凹部１２にドライバービット等の工具を嵌入し、この工具を操作して固定具１をねじ込む。これにより、螺合部６は回転しながら固定用孔１０から下地材１１にねじ込まれる。次に切削部８も回転しながら固定用孔１０内を進むが、このとき切削部８の外径ｂより固定用孔１０の内径ｅの方が小さい場合は、切削部８のリーマー７が固定用孔１０の内面を切削し、固定用孔１０の表面開口から切削部８が進んだ位置までの固定用孔１０の内径が拡張される。次に連結部３は、固定用孔１０の内側に収められる。このとき、前記のように固定用孔１０の内径が切削部８のリーマー７によって拡張され、且つ前記連結部３の最大外径ｃは切削部８の外径ｂよりも小さいため、連結部３は固定用孔１０の開口に引っ掛かることなく固定用孔１０内に収められる。また、頭部４の外径ａは切削部８の外径ｂよりも大きいため、切削部８によって拡大された固定用孔１０の開口に落ち込むことなく、被着材９の表面に当接する。 The adherend 9 is fixed to the base material 11 using the fixture 1 having the above-described configuration (see FIGS. 2A and 2B). First, the adherend 9 is disposed along the surface of the base material 11. In this state, with the fixing hole 10 of the adherend 9 and the lower end of the screw portion 2 of the fixture 1 being aligned, a tool such as a screwdriver bit is inserted into the insertion recess 12 of the fixture 1. Is operated to screw in the fixture 1. Thereby, the screwing portion 6 is screwed into the base material 11 from the fixing hole 10 while rotating. Next, the cutting part 8 also rotates and advances through the fixing hole 10. If the inner diameter e of the fixing hole 10 is smaller than the outer diameter b of the cutting part 8 at this time, the reamer 7 of the cutting part 8 is fixed. The inner surface of the fixing hole 10 is expanded from the surface opening of the fixing hole 10 to the position where the cutting portion 8 has advanced. Next, the connecting portion 3 is housed inside the fixing hole 10. At this time, since the inner diameter of the fixing hole 10 is expanded by the reamer 7 of the cutting portion 8 and the maximum outer diameter c of the connecting portion 3 is smaller than the outer diameter b of the cutting portion 8 as described above, the connecting portion 3. Is accommodated in the fixing hole 10 without being caught in the opening of the fixing hole 10. Further, since the outer diameter a of the head 4 is larger than the outer diameter b of the cutting portion 8, the head 4 comes into contact with the surface of the adherend 9 without falling into the opening of the fixing hole 10 enlarged by the cutting portion 8.

従って、固定用孔１０の内径ｅが連結部３の最大外径ｃよりも小さい場合であっても、連結部３が固定用孔１０の開口に引っ掛かることがなく、このため、被着材９の表面からの頭部４の突出が防止されると共に、固定具１と固定用孔１０との間の隙間に水が浸入することも防止される。また、リーマー７による切削によって生じた切削屑はそのまま固定用孔１０の内側に溜まるため、頭部４の下面と被着材９の表面との間に切削屑が介在することが防止される。このため、前記切削屑の介在によって頭部４が被着材９の表面から突出したり、その後に切削屑が除去されて固定具１の頭部４と被着材９の表面との間の隙間から水が浸入したりすることが、防止される。 Therefore, even when the inner diameter e of the fixing hole 10 is smaller than the maximum outer diameter c of the connecting portion 3, the connecting portion 3 does not get caught in the opening of the fixing hole 10. As a result, the head 4 is prevented from protruding from the surface, and water is also prevented from entering the gap between the fixture 1 and the fixing hole 10. Further, since the cutting waste generated by cutting by the reamer 7 is directly accumulated inside the fixing hole 10, the cutting waste is prevented from interposing between the lower surface of the head 4 and the surface of the adherend 9. For this reason, the head 4 protrudes from the surface of the adherend 9 due to the intervention of the cutting waste, or the cutting waste is removed thereafter, and the gap between the head 4 of the fixture 1 and the surface of the adherend 9 is removed. Intrusion of water from the water is prevented.

また、特に固定具１の頭部４の下面と切削部８の下端位置との間の寸法ｆが、被着材９の厚み寸法ｇよりも小さいと、切削部８は固定用孔１０の内側に配置され、下地材１１は固定具１のねじ込み時にリーマー７によって切削されることはなくなる。ここで、リーマー７で下地材１１を切削する場合には、リーマー７と下地材１１との間に生じる抵抗によって、固定具１の嵌入凹部１２と工具との間にかかる応力が増大する。しかし、前記のように下地材１１がリーマー７によって切削されないと、前記のような嵌入凹部１２と工具との間の応力の増大が防止され、この結果、頭部４の潰れ（なめ）が更に抑制される。 In particular, when the dimension f between the lower surface of the head 4 of the fixture 1 and the lower end position of the cutting part 8 is smaller than the thickness dimension g of the adherend 9, the cutting part 8 is located inside the fixing hole 10. The base material 11 is not cut by the reamer 7 when the fixture 1 is screwed. Here, when the base material 11 is cut by the reamer 7, the stress applied between the fitting recess 12 of the fixture 1 and the tool increases due to the resistance generated between the reamer 7 and the base material 11. However, if the base material 11 is not cut by the reamer 7 as described above, an increase in stress between the insertion recess 12 and the tool as described above is prevented, and as a result, the crushing (licking) of the head 4 is further increased. It is suppressed.

また、上記のような固定具１において、頭部の外径ａ、切削部８の外径ｂ、及び連結部３の最大外径ｃが、ａ＞ｃ＞ｂの関係となるようにすると共に、連結部３の最大外径ｃと切削部８の外径ｂとの差が１．５ｍｍ以下の範囲になるようにしても良い。また、このとき、切削部８の外径ｂと螺合部６の外径ｄとが、ｂ≧ｄの関係にあることが好ましく、特にｂ＞ｄの関係にあることが好ましい。この場合、頭部の外径ａは７〜１０ｍｍの範囲、切削部８の外径ｂは５〜６ｍｍの範囲、連結部３の最大外径ｃは５〜７ｍｍの範囲、螺合部６の外径ｄは４〜４．２ｍｍの範囲とすることができる。他の構成は、上述の図１，２に示す例の場合と同様とすることができる。 In the fixture 1 as described above, the outer diameter a of the head, the outer diameter b of the cutting portion 8, and the maximum outer diameter c of the connecting portion 3 are in a relationship of a> c> b. The difference between the maximum outer diameter c of the connecting portion 3 and the outer diameter b of the cutting portion 8 may be in the range of 1.5 mm or less. At this time, the outer diameter b of the cutting portion 8 and the outer diameter d of the screwing portion 6 are preferably in a relationship of b ≧ d, and particularly preferably in a relationship of b> d. In this case, the outer diameter a of the head is in the range of 7 to 10 mm, the outer diameter b of the cutting portion 8 is in the range of 5 to 6 mm, the maximum outer diameter c of the connecting portion 3 is in the range of 5 to 7 mm, The outer diameter d can be in the range of 4 to 4.2 mm. Other configurations can be the same as those in the example shown in FIGS.

このような固定具１でも、上記の場合と同様にして下地材１１に対して被着材９を固定することができる。このとき、切削部８の外径ｂが連結部３の最大外径ｃよりも小さいため、固定具１のねじ込み時に切削部８によって拡張された固定用孔１０の内径も連結部３の最大外径ｃより小さくなるが、この連結部３の最大外径ｃと、前記拡張された固定用孔１０の内径との差も１．５ｍｍ以下の範囲となって、僅の差しかない。このため、固定具１は連結部３の大部分が固定用孔１０の内側に収められるまでねじ込まれ、或いは連結部３から固着用孔１０の開口縁にかかる荷重によってこの開口縁部分が変形することで固定具１が頭部３の下面が固定用孔１０の開口縁に当接するまでねじ込まれる。このため、上述の図１，２に示す例の場合と同様に、被着材９の表面からの頭部４の突出が防止されると共に、固定具１と固定用孔１０との間の隙間に水が浸入することも防止される。 Even with such a fixture 1, the adherend 9 can be fixed to the base material 11 in the same manner as described above. At this time, since the outer diameter b of the cutting portion 8 is smaller than the maximum outer diameter c of the connecting portion 3, the inner diameter of the fixing hole 10 expanded by the cutting portion 8 when the fixing tool 1 is screwed is also the maximum outer diameter of the connecting portion 3. Although the diameter is smaller than the diameter c, the difference between the maximum outer diameter c of the connecting portion 3 and the inner diameter of the expanded fixing hole 10 is also within a range of 1.5 mm or less, so that there is little difference. For this reason, the fixture 1 is screwed in until most of the connecting portion 3 is accommodated inside the fixing hole 10, or the opening edge portion is deformed by a load applied from the connecting portion 3 to the opening edge of the fixing hole 10. Thus, the fixing tool 1 is screwed in until the lower surface of the head 3 abuts against the opening edge of the fixing hole 10. For this reason, as in the case of the example shown in FIGS. 1 and 2 described above, the head 4 is prevented from projecting from the surface of the adherend 9, and the gap between the fixture 1 and the fixing hole 10 is prevented. Water can also be prevented from entering.

尚、固定時に被着材９にクラックが発生することを防止するためには、被着材９の固定具１による固定荷重負担をより小さくすることが好ましく、このためには連結部３の最大外径ｃと切削部８の外径ｂとの差が特に１ｍｍ以下であることが好ましい。 In order to prevent cracks in the adherend 9 during fixation, it is preferable to reduce the load of the load on the adherend 9 due to the fixture 1. The difference between the outer diameter c and the outer diameter b of the cutting portion 8 is particularly preferably 1 mm or less.

本発明に係る固定具は、適宜の被着材を下地材に固定するために使用することができるが、建築物の外装材の固定、特にスレート屋根材等の薄板状の屋根材の固定に、好適に用いられる。 The fixing device according to the present invention can be used for fixing an appropriate adherend to a base material, but for fixing a building exterior material, particularly a thin plate-like roof material such as a slate roofing material. Are preferably used.

本発明の実施の形態の一例を示すものであり、（ａ）は平面図、（ｂ）は正面図である。An example of embodiment of this invention is shown, (a) is a top view, (b) is a front view. 同上の使用形態を示すものであり、（ａ）及び（ｂ）は断面図である。The usage pattern is shown, and (a) and (b) are sectional views. 従来技術の一例を示すものであり、（ａ）及び（ｂ）は断面図である。An example of a prior art is shown, (a) And (b) is sectional drawing.

Explanation of symbols

１固定具
２ねじ部
３連結部
４頭部
５ねじ山
６螺合部
７リーマー
８切削部
９被着材
１０固定用孔
１１下地材 DESCRIPTION OF SYMBOLS 1 Fixing tool 2 Thread part 3 Connection part 4 Head part 5 Screw thread 6 Threading part 7 Reamer 8 Cutting part 9 Adhering material 10 Fixing hole 11 Base material

Claims

A fixing tool for fixing an adherend having a fixing hole penetrating in a thickness direction to a base material, which is formed at a screw portion, a connecting portion formed at an upper end of the screw portion, and an upper end of the connecting portion. With a head,
The threaded portion is provided with a threaded portion with a thread formed on the lower end side, and a cutting portion with a reamer formed on the upper end side,
Outer diameter a of the head, the outer diameter b of the cutting portion, and a maximum outer diameter c of the connecting portion, a> b Ri near relationship ≧ c, the outer diameter a of the head of the cutting portion the difference between the outer diameter b is, fixture and said range der Rukoto of 2 to 3 mm.

The fixture according to claim 1, wherein a maximum outer diameter c of the connecting portion and an outer diameter d of the screwing portion are in a relationship of c ≧ d.

The fixture according to claim 2, wherein an outer diameter b of the cutting portion and an outer diameter d of the screwing portion are in a relationship of b ≧ d.

The fixture according to any one of claims 1 to 3 , wherein a dimension between a lower surface of the head and a lower end position of the cutting part is smaller than a thickness dimension of the adherend.

The fixing tool according to any one of claims 1 to 4 , wherein an outer diameter of the screwing portion and an inner diameter of the fixing hole are substantially equal.