JP3859526B2

JP3859526B2 - Female thread

Info

Publication number: JP3859526B2
Application number: JP2002060230A
Authority: JP
Inventors: 和好小林
Original assignee: 小林鋲螺株式会社
Priority date: 2002-03-06
Filing date: 2002-03-06
Publication date: 2006-12-20
Anticipated expiration: 2022-03-06
Also published as: JP2003254314A

Description

【０００１】
【発明の属する技術分野】
本発明は板体の貫通穴に嵌着するためのめねじに関する。
【０００２】
【従来の技術】
近年、製造されている機器、機械などでは、樹脂と金属部品とが複合的に組み合わされて製造されることが多い。
【０００３】
このため、例えば樹脂製の板体に金具などの部材を取付けるために、金属製のめねじを埋め込んだ状態で設けて、このめねじによって他の部材を固定することが、従来から一般に行われている。
【０００４】
即ち、図５に示すように板体１にめねじ２を設け、このめねじ２のねじ穴３に、図６に示すように例えば金具などの部材４の取付け穴４ａを一致させて、ボルト５を部材４の取付け穴４ａからめねじ２のねじ穴３に螺着し回転させ締付けて、板体１とボルト５の頭部５ａとの間に部材４を強く挟持して固定している。
【０００５】
この板体１へのめねじ２の取付けは、従来では、次のような三つの方法で行われている。
（イ）樹脂で板体１を成形する際にめねじ２を金型にいれて板体１とめねじ２を一体成形する。あるいは熱で樹脂を軟らかくしてめねじ２を挿入し冷却固定させる。
（ロ）板体１に貫通穴をあけ接着剤によって貫通穴内にめねじ２を固定する。
（ハ）板体１の貫通穴にめねじ２を挿入し、専用工具でめねじ２をカシメ加工によって変形させて貫通穴から脱落不能にする。
【０００６】
【発明が解決しようとする課題】
近年、リサイクル法の施行によって、製品材料の再利用が求められるようになり、製品を廃棄する際に、樹脂素材と金属部品とを分別する作業が必要となっているが、前記したような従来の方法で取り付けためねじ２は、板体１からめねじ２だけを取り外すことができない。即ち、（イ）の樹脂との一体成形によるものでも、（ロ）の接着によるものでも、（ハ）のカシメ加工によるものでも、板体１から金属製のめねじ２のみを分離したり取り外したりできない。
【０００７】
このため、樹脂と金属部品とを完全分離できず、次善の策としてめねじ２を囲む樹脂部分ごと切り取って廃棄しているのが実情である。
【０００８】
本発明はこのような問題を解決し、樹脂などの板体に簡単に取り付け固定ができると共に、板体から簡単に取り外しもできるようにした嵌着用めねじを提供することを目的としている。
【０００９】
【課題を解決するための手段】
前記目的を達成するために、本発明の嵌着用めねじでは
板体（２０）に垂直に設けられた断面円形の貫通穴（２１）と該貫通穴（２１）の軸方向の一端に設けられた円形の皿穴（２２）とに嵌着される、ねじ面（１１）が内周面に設けられた筒部（１２）と該筒部（１２）の軸方向の一端の外周に設けられた円形の鍔部（１３）とから成る嵌着用めねじであって、
前記鍔部（１３）の外径を前記板体（２０）の皿穴（２２）の内径より小に設定し、
前記筒部（１２）の外周面に軸方向の中間部が前記板体（２０）の貫通穴（２１）の内径よりも大なる最大外径で外方へ円弧状に膨出した膨出部（１４）を形成すると共に、
前記筒部（１２）の下端部（１２ａ）及び上端部の外径を板体（２０）の貫通穴（２１）の内径より小なる外径に設定し、
板体（２０）の貫通穴（２１）に前記筒部（１２）を圧入することによって、前記板体（２０）の皿穴（２２）に前記鍔部（１３）が皿穴（２２）の底面（２２ａ）に当接して収納され、且つ板体（２０）の貫通穴（２１）の軸方向の中間部の内壁が押し込まれた状態で前記筒部（１２）の膨出部（１４）の円弧状の一部が軸方向の上下から包み込まれるように貫通穴（２１）の内壁によって押圧され締め付けられた状態で嵌着されるようにしたことを特徴としている。
【００１０】
【発明の実施の形態】
以下、図面に基づいて本発明の実施の形態を説明する。
図１は本発明の一実施形態の嵌着用めねじ１０を示している。
【００１１】
図１、２に示すように、この嵌着用めねじ１０は、ねじ面１１が円形の内周面に設けられた筒部１２と、この筒部１２の軸方向の一端の外周に軸方向に対して垂直な方向に設けられた円形の鍔部１３とから成る。この筒部１２の円形の外周面に軸方向の中間部が外方へ円弧状に膨出した形状の膨出部１４が設けられている。
【００１２】
図２、３に示すように、この嵌着用めねじ１０を取り付けるための樹脂製の板体２０には、前記筒部１２を圧入可能で且つ逆に押し出しも可能なように、円形の膨出部１４の最大外径より僅かに小径で且つ筒部１２下端部１２ａの外径より大径の円形の貫通穴２１が、板体２０に垂直な方向に設けられている。
【００１３】
この貫通穴２１の軸方向の一端には、円形の鍔部１３の外径より内径が僅かに大きい円形の皿穴２２が設けられている。
【００１４】
このように筒部１２の外周面は軸方向の中間部が円弧状に外側へ膨出した形状になっているので、図２に示すように皿穴２１側からこの嵌着用めねじ１０の筒部１２の下端部１２ａを貫通穴２１に入れて、鍔部１３を指などで強く押圧することによって、膨出部１４で樹脂製の板体２０の貫通穴２１の内壁を僅かに押し込ませつつ、図３に示すように、筒部１２を貫通穴２１内に容易に圧入することができる。
【００１５】
従って、図３に示すように、鍔部１３の下面が皿穴２２の底面２２ａに当接するまで押し込めば、筒部１２が板体２０の貫通穴２１に嵌着され、鍔部１３が皿穴２２に収納された状態に、板体２０に嵌着用めねじ１０を取り付けることができる。
【００１６】
この圧入状態では、筒部１２の軸方向の中間の膨出部１４が、図３に矢印で示すように板体２０の貫通穴２１の内壁によって軸方向の上下から包み込まれるように押圧され締め付けられているから、温度変化で板体２０の膨張や収縮が生じても、あるいは振動などの外力を受けても、嵌着用めねじ１０のガタツキや脱落は未然に防止される。
【００１７】
図４に示すように、このようにして板体２０に設けためねじ１０のねじ穴１１に、例えば金具などの部材４の取付け穴４ａを一致させて、ボルト５を部材４の取付け穴４ａからめねじ１０のねじ穴１１に螺着し回転させて締付けて、板体２０とボルト５の頭部５ａとの間に部材４を強く挟持して固定することができる。
【００１８】
前記したように、製品を廃棄する際に樹脂製の板体２０と金属製のめねじ１０とを分別する作業が必要となっているが、前記したように板体２０の貫通穴２１に嵌着された筒部１２の外周面は軸方向に円弧状に湾曲しているので、図３の状態から筒部１２の下端部１２ａを何らかの棒状の物などで鍔部１３側へ軸方向に押し込めば、貫通穴２１から図２に示す状態になるように外方へ容易に押し出して取り外すことができる。
【００１９】
なお、図１に示すように、嵌着用めねじ１０の筒部１２の上端と鍔部１３の下面との境界部に、回り止め突起１５を円周方向に一つあるいは複数設ければ、図３に示すように嵌着用めねじ１０を貫通穴２１に取り付けた状態において，貫通穴２１の上端角部に回り止め突起１５が食い込んだ状態になっているから、ボルト５の締付けの際の嵌着用めねじ１０の共回りを防ぐことができる。
【００２０】
また、板体２０の材料としては、樹脂に限らず、木材、グラスファイバー、アルミ合金、金属の薄板鋼板などを用いてもよい。
【００２１】
【発明の効果】
以上のように、本発明の嵌着用めねじ１０は、ねじ面１１が内周面に設けられた筒部１２と、この筒部１２の軸方向の一端の外周に設けられた鍔部１３とから成り、前記筒部１２の外周面に軸方向の中間部が外方へ円弧状に膨出した膨出部１４を設けて、膨出部１４の最大外径より小径の板体２０の貫通穴２１に前記筒部１２を容易に圧入できるようにし、且つ、嵌着状態の筒部１２を容易に貫通穴２１から外方へ押し出して取り外しできるようにしている。
【００２２】
このため、特別な専用工具を使用せずに簡単に板体２０の貫通穴２１に取り付けたり、取り外したりすることができ、しかも、この取り付け状態において筒部１２の軸方向の中間の膨出部１４が、板体２０の貫通穴２１の内壁によって軸方向の上下から包み込まれるようにして押圧され締め付けられているから、貫通穴２１に押し込むだけで強固に確実に板体２０に取り付けることができる。従って、一体成形や接着やカシメ加工などの複雑な工程が不要で単に押し込むだけでいいから、製造コストを大幅に軽減することができる。
【００２３】
また、製品を廃棄する際に板体２０とめねじ１０とを分別するには、板体２０の貫通穴２１に嵌着された筒部１２の外周面は軸方向に円弧状に湾曲した形状になっているので、筒部１２の下端部１２ａを特別な専用工具を使用することなく何らかの棒状の物などで鍔部１３側へ軸方向に押し込んで板体２０から簡単に取り外すことができる。
【００２４】
また、圧入によって取り付けるので、めねじ１０の寸法や貫通穴２１の寸法に多少のバラツキがあってもほとんど問題を生じない。
【００２５】
また、鍔部１３を設けたため，めねじ１０自体の強度が補強され，また筒部１２の軸線を板体２０平面に対して垂直に保って取り付けることができる。
【図面の簡単な説明】
【図１】本発明の一実施形態の嵌着用めねじを示す正面図
【図２】同実施形態の嵌着用めねじを板体の貫通穴に取り付ける前の状態を示す断面図
【図３】同実施形態の嵌着用めねじを板体の貫通穴に取り付けた状態を示す断面図
【図４】同実施形態の嵌着用めねじを利用してボルトで部材を板体に固定した状態を示す断面図
【図５】従来のめねじを取り付けた板体を示す断面図
【図６】従来のめねじを取り付けた板体に部材を固定した状態を示す断面図
【符号の説明】
１０嵌着用めねじ
１１ねじ穴
１２筒部
１２ａ下端部
１３鍔部
１４膨出部
１５回り止め突起
２０板体
２１貫通穴
２２皿穴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a female screw for fitting into a through hole of a plate.
[0002]
[Prior art]
In recent years, devices, machines, and the like that are manufactured are often manufactured by combining resin and metal parts in a composite manner.
[0003]
For this reason, for example, in order to attach a member such as a metal fitting to a resin plate, for example, it has been generally performed that a metal female screw is embedded and another member is fixed by this female screw. ing.
[0004]
That is, a female screw 2 is provided on the plate body 1 as shown in FIG. 5, and a mounting hole 4a of a member 4 such as a metal fitting is aligned with a screw hole 3 of the female screw 2 as shown in FIG. 5 is screwed into the screw hole 3 of the female screw 2 from the mounting hole 4a of the member 4 and is rotated and tightened, and the member 4 is firmly clamped and fixed between the plate body 1 and the head 5a of the bolt 5.
[0005]
Conventionally, the female screw 2 is attached to the plate body 1 by the following three methods.
(A) When the plate body 1 is formed of resin, the female screw 2 is put in a mold and the plate body 1 and the female screw 2 are integrally formed. Alternatively, the resin is softened with heat and the female screw 2 is inserted and cooled and fixed.
(B) A through hole is made in the plate body 1 and the female screw 2 is fixed in the through hole with an adhesive.
(C) The female screw 2 is inserted into the through hole of the plate body 1 and the female screw 2 is deformed by caulking with a dedicated tool so that it cannot be removed from the through hole.
[0006]
[Problems to be solved by the invention]
In recent years, due to the enforcement of the recycling law, it has become necessary to reuse product materials, and when disposing of products, it is necessary to separate resin materials from metal parts. Since the screws 2 are attached by the above method, only the female screw 2 cannot be removed from the plate body 1. That is, only the metal female screw 2 is separated from or removed from the plate 1, whether by (i) integral molding with the resin, (b) adhesion, or (c) caulking. I can't.
[0007]
For this reason, the resin and the metal parts cannot be completely separated, and as a suboptimal measure, the entire resin portion surrounding the female screw 2 is cut and discarded.
[0008]
An object of the present invention is to solve such a problem and to provide a fitting female screw that can be easily attached and fixed to a plate body such as resin and can be easily detached from the plate body.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the female screw for fitting of the present invention,
Screws fitted into a through hole (21) having a circular cross section provided perpendicular to the plate (20) and a circular countersink (22) provided at one end of the through hole (21) in the axial direction A fitting female screw whose surface (11) comprises a cylindrical part (12) provided on the inner peripheral surface and a circular collar part (13) provided on the outer periphery of one end in the axial direction of the cylindrical part (12). There,
The outer diameter of the flange (13) is set smaller than the inner diameter of the countersink (22) of the plate (20),
A bulging portion in which an axially intermediate portion bulges outward in an arc shape on the outer peripheral surface of the cylindrical portion (12) with a maximum outer diameter larger than the inner diameter of the through hole (21) of the plate body (20). Forming (14),
The outer diameter of the lower end (12a) and the upper end of the cylindrical part (12) is set to an outer diameter smaller than the inner diameter of the through hole (21) of the plate body (20),
By pressing the cylinder part (12) into the through hole (21) of the plate body (20), the flange part (13) of the countersunk hole (22) is inserted into the countersink (22) of the plate body (20). The bulging portion (14) of the cylindrical portion (12) is stored in contact with the bottom surface (22a) and the inner wall of the axially intermediate portion of the through hole (21) of the plate body (20) is pushed in. It is characterized in that it is fitted in a state where it is pressed and tightened by the inner wall of the through hole (21) so that a part of the arc shape is wrapped from above and below in the axial direction.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a fitting female screw 10 according to an embodiment of the present invention.
[0011]
As shown in FIGS. 1 and 2, the fitting female screw 10 includes a cylindrical portion 12 having a threaded surface 11 provided on a circular inner peripheral surface, and an outer periphery of one end of the cylindrical portion 12 in the axial direction. It consists of a circular collar 13 provided in a direction perpendicular to it. A bulging portion 14 having a shape in which an axial intermediate portion bulges outward in an arc shape is provided on the circular outer peripheral surface of the cylindrical portion 12.
[0012]
As shown in FIGS. 2 and 3, a circular bulge is formed on the resin plate 20 for attaching the fitting female screw 10 so that the cylindrical portion 12 can be press-fitted and can also be extruded. A circular through hole 21 having a diameter slightly smaller than the maximum outer diameter of the portion 14 and larger than the outer diameter of the lower end portion 12 a of the cylindrical portion 12 is provided in a direction perpendicular to the plate body 20.
[0013]
A circular countersink 22 having an inner diameter slightly larger than the outer diameter of the circular flange 13 is provided at one end of the through hole 21 in the axial direction.
[0014]
Thus, since the outer peripheral surface of the cylindrical portion 12 has a shape in which the axial intermediate portion bulges outward in an arc shape, as shown in FIG. The lower end portion 12a of the portion 12 is inserted into the through hole 21, and the flange portion 13 is strongly pressed with a finger or the like, so that the bulging portion 14 slightly pushes the inner wall of the through hole 21 of the resin plate 20 As shown in FIG. 3, the cylindrical portion 12 can be easily press-fitted into the through hole 21.
[0015]
Therefore, as shown in FIG. 3, when the bottom surface of the flange portion 13 is pushed in until it contacts the bottom surface 22 a of the countersink 22, the cylinder portion 12 is fitted into the through hole 21 of the plate body 20, and the flange portion 13 is The female screw 10 for fitting can be attached to the plate body 20 in the state of being accommodated in 22.
[0016]
In this press-fitted state, the axially intermediate bulging portion 14 of the cylindrical portion 12 is pressed and tightened so as to be wrapped from above and below in the axial direction by the inner wall of the through hole 21 of the plate 20 as indicated by arrows in FIG. Therefore, even if the plate body 20 expands or contracts due to a temperature change, or receives external force such as vibration, rattling and falling off of the fitting female screw 10 are prevented.
[0017]
As shown in FIG. 4, the mounting hole 4a of the member 4 such as a metal fitting is aligned with the screw hole 11 of the screw 10 to be provided in the plate body 20 in this way, and the bolt 5 is fitted from the mounting hole 4a of the member 4. The member 4 can be firmly clamped and fixed between the plate body 20 and the head 5a of the bolt 5 by being screwed into the screw hole 11 of the screw 10 and rotated and tightened.
[0018]
As described above, when the product is discarded, it is necessary to separate the resin plate 20 and the metal female screw 10, but as described above, the product is fitted into the through hole 21 of the plate 20. Since the outer peripheral surface of the attached cylindrical portion 12 is curved in an arc shape in the axial direction, the lower end portion 12a of the cylindrical portion 12 is pushed in the axial direction toward the flange portion 13 side with some rod-like object from the state of FIG. Then, it can be easily pushed out from the through hole 21 so as to be in the state shown in FIG.
[0019]
As shown in FIG. 1, if one or a plurality of detent protrusions 15 are provided in the circumferential direction at the boundary between the upper end of the cylindrical portion 12 of the fitting female screw 10 and the lower surface of the flange portion 13, 3, when the internal thread 10 is fitted in the through-hole 21, the anti-rotation protrusion 15 is biting into the upper end corner of the through-hole 21. Co-rotation of the wearing female screw 10 can be prevented.
[0020]
Further, the material of the plate 20 is not limited to resin, and wood, glass fiber, aluminum alloy, metal thin steel plate, or the like may be used.
[0021]
【The invention's effect】
As described above, the fitting female screw 10 according to the present invention includes the cylindrical portion 12 having the screw surface 11 provided on the inner peripheral surface, and the flange portion 13 provided on the outer periphery of one end in the axial direction of the cylindrical portion 12. And a bulging portion 14 having an axially intermediate portion bulging outwardly in an arc shape is provided on the outer peripheral surface of the cylindrical portion 12 so as to penetrate the plate body 20 having a diameter smaller than the maximum outer diameter of the bulging portion 14. The cylindrical portion 12 can be easily press-fitted into the hole 21, and the fitted cylindrical portion 12 can be easily pushed out of the through hole 21 and removed.
[0022]
For this reason, it can be easily attached to or removed from the through hole 21 of the plate body 20 without using a special dedicated tool, and in addition, in the attached state, an intermediate bulging portion in the axial direction of the cylindrical portion 12 14 is pressed and tightened so as to be wrapped from above and below in the axial direction by the inner wall of the through hole 21 of the plate body 20, so that it can be firmly and securely attached to the plate body 20 simply by being pushed into the through hole 21. . Therefore, complicated processes such as integral molding, adhesion, and caulking are not required, and it is only necessary to push in, so that the manufacturing cost can be greatly reduced.
[0023]
Further, in order to separate the plate body 20 and the female screw 10 when the product is discarded, the outer peripheral surface of the cylindrical portion 12 fitted in the through hole 21 of the plate body 20 has a shape curved in an arc shape in the axial direction. Therefore, the lower end portion 12a of the cylindrical portion 12 can be easily removed from the plate body 20 by pushing it in the axial direction toward the flange portion 13 side with any rod-like object without using a special dedicated tool.
[0024]
Moreover, since it attaches by press-fitting, even if there is some variation in the dimension of the internal thread 10 and the dimension of the through hole 21, there is almost no problem.
[0025]
Further, since the flange portion 13 is provided, the strength of the female screw 10 itself is reinforced, and the axis of the cylindrical portion 12 can be attached while being kept perpendicular to the plane of the plate body 20.
[Brief description of the drawings]
FIG. 1 is a front view showing a female fitting screw according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state before the female fitting screw according to the embodiment is attached to a through hole of a plate body. Sectional drawing which shows the state which attached the fitting female screw of the same embodiment to the through-hole of the board body. FIG. 4 shows the state which fixed the member to the board with the volt | bolt using the female fitting screw of the embodiment. Sectional view [FIG. 5] Cross-sectional view showing a plate with a conventional female screw attached [FIG. 6] Cross-sectional view showing a state in which a member is fixed to a plate with a conventional female screw attached [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fitting female screw 11 Screw hole 12 Cylindrical part 12a Lower end part 13 Gutter part 14 Swelling part 15 Anti-rotation protrusion 20 Plate body 21 Through hole 22 Countersink

Claims

Screws fitted into a through hole (21) having a circular cross section provided perpendicular to the plate (20) and a circular countersink (22) provided at one end of the through hole (21) in the axial direction A fitting female screw whose surface (11) comprises a cylindrical part (12) provided on the inner peripheral surface and a circular collar part (13) provided on the outer periphery of one end in the axial direction of the cylindrical part (12). There,
The outer diameter of the flange (13) is set smaller than the inner diameter of the countersink (22) of the plate (20),
A bulging portion in which an axially intermediate portion bulges outward in an arc shape on the outer peripheral surface of the cylindrical portion (12) with a maximum outer diameter larger than the inner diameter of the through hole (21) of the plate body (20). Forming (14),
The outer diameter of the lower end (12a) and the upper end of the cylindrical part (12) is set to an outer diameter smaller than the inner diameter of the through hole (21) of the plate body (20),
By pressing the cylinder part (12) into the through hole (21) of the plate body (20), the flange part (13) of the countersunk hole (22) is inserted into the countersink (22) of the plate body (20). The bulging portion (14) of the cylindrical portion (12) is stored in contact with the bottom surface (22a) and the inner wall of the axially intermediate portion of the through hole (21) of the plate body (20) is pushed in. A fitting female screw characterized by being fitted in a state of being pressed and tightened by the inner wall of the through hole (21) so that a part of the circular arc shape is wrapped from above and below in the axial direction .