JP2021175909A

JP2021175909A - Nut attachment structure near welding part

Info

Publication number: JP2021175909A
Application number: JP2020081160A
Authority: JP
Inventors: 敏彰池田; Toshiaki Ikeda
Original assignee: Press Kogyo Co Ltd
Current assignee: Press Kogyo Co Ltd
Priority date: 2020-05-01
Filing date: 2020-05-01
Publication date: 2021-11-04
Anticipated expiration: 2040-05-01
Also published as: JP7493997B2

Abstract

To provide a nut attachment structure near a welding part which can inhibit deformation of a screw part by welding heat even if a distance from a welding part to a nut is short and minimize an attachment space in a nut height direction to obtain fastening torque.SOLUTION: A nut attachment structure 1 near a welding part according to the invention includes: an attachment plate 3 having folded parts 2 at edge parts; welding beads 5 each of which is formed by welding the folded part 2 of the attachment plate 3 to an attached member 4; a gap W formed between a portion 9 excluding the folded parts 2 of the attachment plate 3 and the attached member 4; and attachment holes 6 formed in a penetrating manner at the portion 9 excluding the folded parts 2 of the attachment plate 3 and each having a polygonal shape or an elongated shape; nuts 7 each of which is formed in the same shape as the attachment hole 6 and housed in the attachment hole 6 through a clearance C in an unrotatable manner; and flanges 8 each extending from the nut 7 to the gap W.SELECTED DRAWING: Figure 3

Description

本発明は、溶接部近傍のナット取付構造に係り、特に、溶接時の熱によるネジ部の変形を抑制できる溶接部近傍のナット取付構造に関する。 The present invention relates to a nut mounting structure in the vicinity of the welded portion, and more particularly to a nut mounting structure in the vicinity of the welded portion capable of suppressing deformation of the threaded portion due to heat during welding.

図１（ａ）に示すように、溶接部近傍のネジ構造として、プレートａに直接タップ処理を施してネジ孔ｂを形成しておき、そのネジ孔ｂ付きのプレートａの縁部を被取付部材ｃに溶接して取り付けたものが知られている。ｄは溶接ビードである。このように被取付部材ｃに溶接されたプレートａのネジ孔ｂには、図１（ｂ）に示すように、ボルトｅがネジ込まれ、ボルトｅとプレートａとの間に被締結部材ｆが挟持される。この構造においては、ネジ孔ｂ付きプレートａを被取付部材ｃに溶接する際、溶接熱によってネジ孔ｂに変形が生じ易く、ボルトｅを適切にネジ込むことが困難となり得る。この場合、ネジ孔ｂをリタップ処理して修正する必要がある。 As shown in FIG. 1A, as a screw structure near the welded portion, the plate a is directly tapped to form a screw hole b, and the edge portion of the plate a with the screw hole b is attached. It is known that the member c is welded and attached. d is a weld bead. As shown in FIG. 1B, a bolt e is screwed into the screw hole b of the plate a welded to the attached member c in this way, and the bolt e is screwed into the screwed member f between the bolt e and the plate a. Is pinched. In this structure, when the plate a with the screw hole b is welded to the member to be attached c, the screw hole b is easily deformed by the welding heat, and it may be difficult to properly screw the bolt e. In this case, it is necessary to retap the screw hole b to correct it.

しかし、被取付部材ｃが例えばアクスルケース等の密封性が要求される部品の場合、図１（ｂ）に示すように、ネジ孔ｂの下方の被取付部材ｃに孔を開けることができないため、タップ工具をネジ孔ｂの奥までネジ込むことができず、リタップ処理によるネジ孔修正に膨大な工数が必要となる。一方、図１（ａ）に示す溶接部（溶接ビードｄ）となるプレートのａ縁部とネジ孔ｂとの距離Ｌ１を大きく設定し、溶接の入熱部からネジ孔ｂを離間させることでネジ孔ｂの熱変形を抑制することが考えられるが、図１（ｂ）に示す被取付部材ｃ（例えばアクスルケース）の形状や周辺部品ｇの制約からプレートａの縁部とネジ孔ｂとの距離Ｌ１を大きくすることができないケースがある。 However, when the mounted member c is a component such as an axle case that requires sealing performance, as shown in FIG. 1 (b), it is not possible to make a hole in the mounted member c below the screw hole b. , The tap tool cannot be screwed all the way into the screw hole b, and a huge amount of man-hours are required to correct the screw hole by the retap process. On the other hand, by setting a large distance L1 between the a-edge portion of the plate serving as the welded portion (welded bead d) and the screw hole b shown in FIG. 1 (a) and separating the screw hole b from the heat input portion of welding. It is conceivable to suppress the thermal deformation of the screw hole b, but due to the shape of the mounted member c (for example, the axle case) shown in FIG. 1 (b) and the restrictions of the peripheral parts g, the edge of the plate a and the screw hole b There are cases where the distance L1 cannot be increased.

また、溶接部近傍のナット取付構造として、図２（ａ）に示すように、逆さＵ字状のプレートｈにボルト挿通孔ｉを貫通形成し、プレートｈの内側にボルト挿通孔ｉの位置に合わせてナットｊを溶接し、そのナットｊ付き逆さＵ字状プレートｈを被取付部材（アクスルケース等）ｃに溶接したものも知られている。しかし、この構造においては、逆さＵ字状プレートｈにナットｊが重なった状態となるため、ナットｊの高さ分（厚さ分）だけ逆さＵ字状プレートｈの高さＨ１が高くなり、被取付部材（アクスルケース等）ｃの周辺部品ｇ（図１（ｂ）参照）の高さ方向のレイアウトの制約により成立しないケースがある。 Further, as a nut mounting structure near the welded portion, as shown in FIG. 2A, a bolt insertion hole i is formed through the inverted U-shaped plate h, and the bolt insertion hole i is located inside the plate h. It is also known that the nut j is welded together and the inverted U-shaped plate h with the nut j is welded to the attached member (axle case or the like) c. However, in this structure, since the nut j is overlapped with the inverted U-shaped plate h, the height H1 of the inverted U-shaped plate h is increased by the height (thickness) of the nut j. In some cases, the peripheral component g (see FIG. 1B) of the mounted member (axle case, etc.) c is not established due to the layout restriction in the height direction.

別の溶接部近傍のナット取付構造として、図２（ｂ）に示すように、ボルト挿通孔ｋが貫通形成された逆さＵ字状のブラケットｍの内方にナットｎを収容し、そのブラケットｍを被取付部材（アクスルケース等）ｃに溶接した袋ナットが知られている。しかし、この袋ナットの場合も、逆さＵ字状ブラケットｍにナットｎが重なった状態となるため、ナットｎの高さ分だけ逆さＵ字状ブラケットｍの高さＨ２が高くなり、被取付部材（アクスルケース等）ｃの周辺部品ｇ（図１（ｂ）参照）の高さ方向のレイアウトの制約により成立しないケースがある。 As a nut mounting structure near another welded portion, as shown in FIG. 2B, the nut n is housed inside an inverted U-shaped bracket m through which a bolt insertion hole k is formed, and the bracket m is accommodated. Is known as a bag nut welded to a member to be attached (axle case, etc.) c. However, also in the case of this bag nut, since the nut n is overlapped with the inverted U-shaped bracket m, the height H2 of the inverted U-shaped bracket m is increased by the height of the nut n, and the member to be attached is attached. (Axle case, etc.) There are cases where the peripheral component g of c (see FIG. 1B) is not established due to layout restrictions in the height direction.

更に別の溶接部近傍のナット取付構造として、図２（ｃ）に示すように、被取付部材ｃにボルト挿通孔ｐを貫通形成し、そのボルト挿通孔ｐの位置に合わせて被取付部材ｃの内側面にナットｑを溶接し、ナットｑに被取付部材ｃの外側からボルト（図示せず）をネジ込むようにした構造が考えられる。しかし、被取付部材ｃにボルト挿通孔ｐが必要となるため、被取付部材ｃが例えばアクスルケース等のオイル密封性が要求される部品の場合、適用できない。 As yet another nut mounting structure near the welded portion, as shown in FIG. 2C, a bolt insertion hole p is formed through the mounted member c, and the mounted member c is aligned with the position of the bolt insertion hole p. A structure is conceivable in which a nut q is welded to the inner surface of the nut q and a bolt (not shown) is screwed into the nut q from the outside of the attached member c. However, since the bolt insertion hole p is required for the attached member c, it cannot be applied when the attached member c is a part such as an axle case that requires oil sealing.

また、特許文献１には、ナットを被取付プレートに溶接する際、溶接熱によるネジ孔の変形を抑制するナットとして、ナット底面のネジ孔の周囲に環状の溝を形成した特殊ナットが開示されている。この特殊ナットは、被取付プレートに貫通形成されたボルト挿通孔の位置に合わせて、被取付プレートに溶接固定される。この溶接の際、溶接熱がナット底面に形成された環状の溝から逃げるため、ネジ孔の熱変形を抑制できる。 Further, Patent Document 1 discloses a special nut in which an annular groove is formed around a screw hole on the bottom surface of the nut as a nut that suppresses deformation of the screw hole due to welding heat when the nut is welded to the plate to be mounted. ing. This special nut is welded and fixed to the mounted plate in accordance with the position of the bolt insertion hole formed through the mounted plate. During this welding, the welding heat escapes from the annular groove formed on the bottom surface of the nut, so that thermal deformation of the screw hole can be suppressed.

しかし、被取付プレートが例えばアクスルケース等のオイル密封性が要求される部品の場合、被取付プレートに孔を開けることができないため、このようなナット取付構造は成立しない。また、このナット取付構造においては、ネジ孔にネジ込まれたボルトの締付トルクを溶接部で受けるため、締付トルクを稼ぐためには溶接ビートを大きくする必要があり、その分、入熱量が増え、環状の溝からの放熱があってもネジ孔に熱変形が生じてしまう可能性がある。 However, when the mounted plate is a part such as an axle case that requires oil sealing, a hole cannot be formed in the mounted plate, so such a nut mounting structure cannot be established. Further, in this nut mounting structure, since the tightening torque of the bolt screwed into the screw hole is received at the welded portion, it is necessary to increase the welding beat in order to obtain the tightening torque, and the amount of heat input is correspondingly large. There is a possibility that the screw holes will be thermally deformed even if heat is dissipated from the annular groove.

特開平７−２７１２３号公報Japanese Unexamined Patent Publication No. 7-27123

以上の事情を考慮して創案された本発明の目的は、溶接部からナットまでの距離が短い場合であっても溶接熱によるネジ部の変形を抑制でき、ナットの高さ方向の取付スペースを可及的に削減でき、締付トルクを稼ぐことができる溶接部近傍のナット取付構造を提供することにある。 An object of the present invention, which was conceived in consideration of the above circumstances, is to suppress deformation of the threaded portion due to welding heat even when the distance from the welded portion to the nut is short, and to provide a mounting space in the nut height direction. It is an object of the present invention to provide a nut mounting structure near a welded portion which can be reduced as much as possible and a tightening torque can be obtained.

上記目的を達成すべく創案された本発明に係る溶接部近傍のナット取付構造によれば、縁部に折曲部を有する取付プレートと、取付プレートの折曲部を被取付部材に溶接して成る溶接ビードと、取付プレートの折曲部以外の部分と被取付部材との間に形成された隙間と、取付プレートの折曲部以外の部分に貫通形成された多角形状または長孔状の装着孔と、装着孔と同形状に形成され装着孔にクリアランスを介して回転不能に収容されたナットと、ナットから隙間に延出されたフランジと、を備えたことを特徴とする溶接部近傍のナット取付構造が提供される。 According to the nut mounting structure near the welded portion according to the present invention, which was devised to achieve the above object, a mounting plate having a bent portion at an edge portion and a bent portion of the mounting plate are welded to a member to be mounted. A polygonal or elongated mounting formed through a weld bead, a gap formed between a portion other than the bent portion of the mounting plate and a member to be mounted, and a portion other than the bent portion of the mounting plate. The vicinity of the welded portion is provided with a hole, a nut formed in the same shape as the mounting hole and non-rotatably accommodated in the mounting hole through a clearance, and a flange extending from the nut into the gap. A nut mounting structure is provided.

本発明に係る溶接部近傍のナット取付構造においては、取付プレートの装着孔に収容されたナットの厚さが、取付プレートの厚さ未満であってもよい。 In the nut mounting structure near the welded portion according to the present invention, the thickness of the nut housed in the mounting hole of the mounting plate may be less than the thickness of the mounting plate.

本発明に係る溶接部近傍のナット取付構造においては、取付プレートの装着孔に収容されたナットのフランジが、取付プレートに点付け溶接またはロー付けされていてもよい。 In the nut mounting structure in the vicinity of the welded portion according to the present invention, the flange of the nut housed in the mounting hole of the mounting plate may be spot-welded or brazed to the mounting plate.

本発明に係る溶接部近傍のナット取付構造においては、取付プレートの装着孔に収容されたナットの厚さが、取付プレートの厚さ以上であり、ナットのフランジが、取付プレートに点付け溶接またはロー付けされていてもよい。 In the nut mounting structure near the welded portion according to the present invention, the thickness of the nut housed in the mounting hole of the mounting plate is equal to or larger than the thickness of the mounting plate, and the flange of the nut is spot-welded or welded to the mounting plate. It may be brazed.

本発明に係る溶接部近傍のナット取付構造においては、ナットにボルトがネジ込まれ、ボルトとナットとの間に被締結部材が挟持された状態となっていてもよい。 In the nut mounting structure in the vicinity of the welded portion according to the present invention, the bolt may be screwed into the nut so that the member to be fastened is sandwiched between the bolt and the nut.

本発明に係る溶接部近傍のナット取付構造によれば、次のような効果を発揮できる。
（１）ナットが取付プレートの装着孔にクリアランスを介して収容されているので、そのクリアランスが取付プレートの折曲部を被取付部材に溶接する際の空気断熱層となる。よって、溶接部からナットまでの距離が短い場合であっても、溶接熱によるネジ孔の変形を抑制でき、リタップ作業が不要となる。
（２）ナットが取付プレートの装着孔に収容されているので、ナットの高さ（厚さ）方向の寸法が取付プレートの板厚に吸収され、高さ（厚さ）方向の寸法を削減できる。よって、被取付部材の周辺部品のナット高さ方向のレイアウトの制約が緩和される。
（３）装着孔およびナットが同じ多角形状または長孔状に形成されていて、相互に回転不能となっているので、ナットにボルトをネジ込んだ際の締付トルクを稼ぐことができる。 According to the nut mounting structure in the vicinity of the welded portion according to the present invention, the following effects can be exhibited.
(1) Since the nut is accommodated in the mounting hole of the mounting plate via a clearance, the clearance serves as an air heat insulating layer when the bent portion of the mounting plate is welded to the mounted member. Therefore, even when the distance from the welded portion to the nut is short, deformation of the screw hole due to welding heat can be suppressed, and retap work becomes unnecessary.
(2) Since the nut is housed in the mounting hole of the mounting plate, the dimension in the height (thickness) direction of the nut is absorbed by the plate thickness of the mounting plate, and the dimension in the height (thickness) direction can be reduced. .. Therefore, the restrictions on the layout of the peripheral parts of the mounted member in the nut height direction are relaxed.
(3) Since the mounting holes and the nut are formed in the same polygonal shape or elongated hole shape and cannot rotate with each other, tightening torque when the bolt is screwed into the nut can be obtained.

従来例を示す説明図であり、（ａ）はネジ孔付きのプレートを被取付部材に溶接した平面図、（ｂ）はそのプレートのネジ孔に被締結部材をボルトで締結した側断面図である。It is explanatory drawing which shows the conventional example, (a) is a plan view which welded the plate with a screw hole to the attached member, (b) is the side sectional view which fastened the fastened member with a bolt to the screw hole of the plate. be. 別の従来例を示す説明図であり、（ａ）はナットが溶接された逆さＵ字状プレートを被取付部材に溶接した側断面図、（ｂ）は所謂袋ナットの側断面図、（ｃ）は被取付部材の内側面にナットを溶接した側断面図である。It is explanatory drawing which shows another conventional example, (a) is the side sectional view which welded the upside-down U-shaped plate which the nut was welded to the attached member, (b) is the side sectional view of the so-called bag nut, (c). ) Is a side sectional view in which a nut is welded to the inner surface of the member to be attached. 本発明の一実施形態に係る溶接部近傍のナット取付構造の説明図であり、（ａ）は取付プレートの斜視図、（ｂ）は取付プレートの装着孔にナットを収容した斜視図、（ｃ）は取付プレートを被取付部材に溶接した側断面図である。It is explanatory drawing of the nut mounting structure near the weld part which concerns on one Embodiment of this invention, (a) is the perspective view of the mounting plate, (b) is the perspective view which accommodated the nut in the mounting hole of the mounting plate, (c). ) Is a side sectional view of the mounting plate welded to the mounted member. （ａ）は図３（ｃ）のナットにボルトをネジ込んで被締結部材を締結した側断面図、（ｂ）は第１変形例を示す側断面図である。(A) is a side sectional view in which a bolt is screwed into the nut of FIG. 3 (c) to fasten the member to be fastened, and (b) is a side sectional view showing a first modification. （ａ）は第２変形例を示す側断面図、（ｂ）は第３変形例を示す側断面図である。(A) is a side sectional view showing a second modified example, and (b) is a side sectional view showing a third modified example.

以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。係る実施形態に示す寸法、材料、その他具体的な数値等は、発明の理解を容易にするための例示に過ぎず、特に断る場合を除き、本発明を限定するものではない。なお、本明細書および図面において、実質的に同一の機能、構成を有する要素については、同一の符号を付することにより重複説明を省略し、また本発明に直接関係のない要素は図示を省略する。 Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, etc. shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. do.

（溶接部近傍のナット取付構造）
図３（ａ）、図３（ｂ）、図３（ｃ）に示すように、本発明の一実施形態に係る溶接部近傍のナット取付構造１は、縁部に折曲部２を有する取付プレート３と、取付プレート３の折曲部２を被取付部材（例えばアクスルケース）４に溶接して成る溶接ビード５と、取付プレート３の折曲部２以外の部分と被取付部材４との間に形成された隙間Ｗと、取付プレート３の折曲部２以外の部分に貫通形成された六角形状の装着孔６と、装着孔６と同形状（六角形状）に形成され装着孔６にクリアランスＣを介して回転不能に収容されたナット７と、ナット７から隙間Ｗに延出されたフランジ８と、を備えている。以下、各構成要素について説明する。 (Nut mounting structure near the weld)
As shown in FIGS. 3 (a), 3 (b), and 3 (c), the nut mounting structure 1 in the vicinity of the weld according to the embodiment of the present invention has a bent portion 2 at the edge. The plate 3, the weld bead 5 formed by welding the bent portion 2 of the mounting plate 3 to the mounted member (for example, the axle case) 4, the portion of the mounting plate 3 other than the bent portion 2, and the mounted member 4. The gap W formed between them, the hexagonal mounting hole 6 formed through the portion other than the bent portion 2 of the mounting plate 3, and the mounting hole 6 formed in the same shape (hexagonal shape) as the mounting hole 6 It includes a nut 7 that is non-rotatably accommodated through a clearance C, and a flange 8 that extends from the nut 7 into a gap W. Hereinafter, each component will be described.

（取付プレート３、折曲部２）
図３（ａ）に示すように、取付プレート３は、例えば厚さ８〜１０ｍｍ程度の鋼板が用いられ、幅方向両端の縁部に段差状に形成された折曲部２と、これら折曲部２以外の部分すなわち折曲部２同士の間に平板状に形成された平板部９とを備えている。折曲部２の下面と平板部９の下面との段差Ｗは、例えば４〜６ｍｍ程度に設定されている。この段差Ｗの寸法は、図３（ｃ）に示すように、取付プレート３の折曲部２を被取付部材４に溶接したとき、取付プレート３の平板部９と被取付部材４との間に形成される隙間Ｗの寸法となる。 (Mounting plate 3, bent part 2)
As shown in FIG. 3A, for the mounting plate 3, for example, a steel plate having a thickness of about 8 to 10 mm is used, and the bent portions 2 formed in a stepped shape at the edges at both ends in the width direction and these bent portions are bent. A flat plate portion 9 formed in a flat plate shape is provided between portions other than the portion 2, that is, between the bent portions 2. The step W between the lower surface of the bent portion 2 and the lower surface of the flat plate portion 9 is set to, for example, about 4 to 6 mm. As shown in FIG. 3C, the dimension of the step W is between the flat plate portion 9 of the mounting plate 3 and the mounted member 4 when the bent portion 2 of the mounting plate 3 is welded to the mounted member 4. It is the dimension of the gap W formed in.

（装着孔６）
図３（ａ）に示すように、取付プレート３の平板部９には、六角形状の装着孔６が四個形成されている。装着孔６の形状は、六角形状に限られず、三角形、四角形、五角形、七角形以上でもよく、楕円形状でも構わない。斯様な装着孔６および段差部２を備えた取付プレート３は、平板状のブランク板をプレス加工することで、中央の平板部９に装着孔６がピアス成形され、両端に折曲部２がフォーム成形（プレス成形）される。なお、装着孔６の数は四個に限られない。 (Mounting hole 6)
As shown in FIG. 3A, four hexagonal mounting holes 6 are formed in the flat plate portion 9 of the mounting plate 3. The shape of the mounting hole 6 is not limited to a hexagonal shape, and may be a triangle, a quadrangle, a pentagon, a heptagon or more, or an elliptical shape. In the mounting plate 3 provided with such a mounting hole 6 and a step portion 2, the mounting hole 6 is pierced in the central flat plate portion 9 by pressing a flat plate-shaped blank plate, and bent portions 2 are formed at both ends. Is foam-molded (press-molded). The number of mounting holes 6 is not limited to four.

（ナット７、クリアランスＣ、溶接ビード５）
図３（ｂ）、図３（ｃ）に示すように、取付プレート３の装着孔６には、装着孔６と同形状のナット７が所定のクリアランスＣを介して回転不能に収容されている。クリアランスＣは、図４（ａ）に示すように、ナット７のネジ孔にボルト１０がネジ込まれて所定の締付トルクが加えられたとき、ナット７が装着孔６の内部でボルト１０と共回りしない寸法であると共に、図３（ｃ）に示すように、取付プレート３の折曲部２の端面を被取付部材４に溶接したとき（５は溶接ビード）、溶接熱によってナット７のネジ孔が熱変形しない空気断熱層のギャップとして機能し得る寸法に設定されており、例えば、０．５〜１．５ｍｍ程度に設定されている。 (Nut 7, clearance C, welding bead 5)
As shown in FIGS. 3 (b) and 3 (c), a nut 7 having the same shape as the mounting hole 6 is housed in the mounting hole 6 of the mounting plate 3 so as not to rotate through a predetermined clearance C. .. As shown in FIG. 4A, the clearance C is such that when the bolt 10 is screwed into the screw hole of the nut 7 and a predetermined tightening torque is applied, the nut 7 becomes the bolt 10 inside the mounting hole 6. As shown in FIG. 3 (c), when the end face of the bent portion 2 of the mounting plate 3 is welded to the mounted member 4 (5 is a welding bead), the nut 7 is subjected to welding heat. The screw holes are set to a size that can function as a gap in the air insulation layer that does not undergo thermal deformation, and are set to, for example, about 0.5 to 1.5 mm.

（フランジ８）
図３（ｃ）に示すように、ナット７には、その下部から取付プレート３の平板部９の下面と被取付部材４の上面との隙間Ｗに延出されたフランジ８が、一体的に形成されている。フランジ８は円板状に形成されており、ナット７が装着孔６から脱落することを防止するため、フランジ８の外径は装着孔（本実施形態では六角形状）６の六角孔の頂点同士の寸法よりも例えば５〜７ｍｍ程度大きく設定されている。フランジ８の厚さは、取付プレート３の折曲部２の下面と平板部９の下面との段差Ｗ（＝隙間Ｗ）の寸法（例えば４〜６ｍｍ）より１〜２ｍｍ程度薄い寸法であり、例えば、例えば３〜５ｍｍ程度に設定されている。斯様なフランジ８付きのナット７が装着孔６に収容された状態の取付プレート３は、折曲部２の端面が被取付部材４に溶接（溶接ビード５）される。 (Flange 8)
As shown in FIG. 3C, the nut 7 is integrally provided with a flange 8 extending from the lower portion of the nut 7 into a gap W between the lower surface of the flat plate portion 9 of the mounting plate 3 and the upper surface of the mounted member 4. It is formed. The flange 8 is formed in a disk shape, and in order to prevent the nut 7 from falling out of the mounting hole 6, the outer diameter of the flange 8 is set between the vertices of the hexagonal holes of the mounting hole (hexagonal shape in this embodiment) 6. For example, it is set to be about 5 to 7 mm larger than the size of. The thickness of the flange 8 is about 1 to 2 mm thinner than the dimension of the step W (= gap W) between the lower surface of the bent portion 2 of the mounting plate 3 and the lower surface of the flat plate portion 9 (for example, 4 to 6 mm). For example, it is set to about 3 to 5 mm, for example. In the mounting plate 3 in which the nut 7 with such a flange 8 is housed in the mounting hole 6, the end face of the bent portion 2 is welded to the mounted member 4 (welded bead 5).

（ナット７の厚さＸ）
図３（ｃ）に示すように、取付プレート３の平板部９の装着孔６に収容されたナット７の厚さＸは、取付プレート３の平板部９の厚さＹ未満に、例えば厚さＹよりも１．５〜２．５ｍｍ程度小さく設定されている。これにより、図４（ａ）に示すように、ナット７のネジ孔にボルト１０をネジ込んでボルト１０とナット７との間に被締結部材（例えばＬ字状プレート）１１を挟持したとき、ナット７のフランジ８が僅かに撓み、被締結部材１１が取付プレート３の平板部９の上面に押し付けられて強固に固定される。このとき、撓んだフランジ８の復元力により、ボルト１０のネジ山とナット７のネジ山とが軸方向に押し付けられ、ボルト１０の緩み止めとなる。 (Thickness X of nut 7)
As shown in FIG. 3C, the thickness X of the nut 7 housed in the mounting hole 6 of the flat plate portion 9 of the mounting plate 3 is less than the thickness Y of the flat plate portion 9 of the mounting plate 3, for example. It is set to be about 1.5 to 2.5 mm smaller than Y. As a result, as shown in FIG. 4A, when the bolt 10 is screwed into the screw hole of the nut 7 and the fastened member (for example, an L-shaped plate) 11 is sandwiched between the bolt 10 and the nut 7. The flange 8 of the nut 7 is slightly bent, and the member to be fastened 11 is pressed against the upper surface of the flat plate portion 9 of the mounting plate 3 to be firmly fixed. At this time, the restoring force of the bent flange 8 presses the threads of the bolt 10 and the threads of the nut 7 in the axial direction to prevent the bolt 10 from loosening.

（作用・効果）
以上の構成から成る本実施形態に係る溶接部近傍のナット取付構造１によれば、次のような効果を発揮できる。 (Action / effect)
According to the nut mounting structure 1 in the vicinity of the welded portion according to the present embodiment having the above configuration, the following effects can be exhibited.

図３（ｃ）に示すように、ナット７が取付プレート３の装着孔６にクリアランスＣを介して収容されているので、そのクリアダンスＣが取付プレート３の折曲部２の端面を被取付部材４に溶接する際の空気断熱層となる。よって、溶接部（溶接ビード５）からナット６までの距離Ｌが短い場合であっても、溶接熱によるナット７のネジ孔の変形を抑制でき、ネジ孔のリタップ作業が不要となる。すなわち、被取付部材４が例えばアクスルケースのように取付プレート３を取り付けるための取付スペースが限られている場合（図１（ｂ）の周辺部品ｇ参照）であっても、溶接熱によるナット７のネジ孔の変形を抑制でき、ネジ孔のリタップ作業が不要となる。また、被取付部材（アクスルケース）４にリタップのための貫通孔を形成する必要はない。 As shown in FIG. 3C, since the nut 7 is housed in the mounting hole 6 of the mounting plate 3 via the clearance C, the clear dance C mounts the end surface of the bent portion 2 of the mounting plate 3. It serves as an air insulation layer when welding to the member 4. Therefore, even when the distance L from the welded portion (weld bead 5) to the nut 6 is short, the deformation of the screw hole of the nut 7 due to the welding heat can be suppressed, and the retap operation of the screw hole becomes unnecessary. That is, even when the mounting member 4 has a limited mounting space for mounting the mounting plate 3 such as an axle case (see peripheral component g in FIG. 1B), the nut 7 due to welding heat is generated. Deformation of the screw hole can be suppressed, and the retap work of the screw hole becomes unnecessary. Further, it is not necessary to form a through hole for retap in the attached member (axle case) 4.

図３（ｂ）、図３（ｃ）に示すように、ナット７が取付プレート３の装着孔６に収容されているので、ナット７の高さ（厚さ）方向の寸法Ｘが取付プレート３の板厚Ｙに吸収され、図２（ａ）及び図２（ｂ）に示す従来例と比べると、取付プレート３の高さ（厚さ）方向の寸法Ｈを削減できる。よって、被取付部材４が例えばアクスルケースのようにナットの高さ方向に図１（ｂ）に示す周辺部品ｇが存在する場合であっても、レイアウトの制約が緩和される。すなわち、被取付部材４のナット７の高さ方向の周辺部品ｇに対してレイアウトの自由度が向上する。 As shown in FIGS. 3B and 3C, since the nut 7 is housed in the mounting hole 6 of the mounting plate 3, the dimension X in the height (thickness) direction of the nut 7 is the mounting plate 3 It is absorbed by the plate thickness Y of the above, and the dimension H in the height (thickness) direction of the mounting plate 3 can be reduced as compared with the conventional example shown in FIGS. 2 (a) and 2 (b). Therefore, even when the attached member 4 has the peripheral component g shown in FIG. 1 (b) in the height direction of the nut as in the axle case, the layout restriction is relaxed. That is, the degree of freedom in layout is improved with respect to the peripheral component g in the height direction of the nut 7 of the attached member 4.

図３（ｂ）、図３（ｃ）に示すように、六角形状のナット７が六角形状の装着孔６に回転不能に収容されているので、図４（ａ）に示すように、ナット７のネジ孔にボルト１０をネジ込んだ際の締付トルクを稼ぐことができる。なお、ナット７および装着孔６を同じ多角形状或いは長孔形状とすることで、ナット７が装着孔６に対して回転不能となっていてもよいことは既述の通りである。 As shown in FIGS. 3 (b) and 3 (c), the hexagonal nut 7 is housed in the hexagonal mounting hole 6 so as not to rotate. Therefore, as shown in FIG. 4 (a), the nut 7 It is possible to obtain a tightening torque when the bolt 10 is screwed into the screw hole of. As described above, the nut 7 and the mounting hole 6 may have the same polygonal shape or elongated hole shape so that the nut 7 cannot rotate with respect to the mounting hole 6.

図３（ｃ）に示すように、装着孔６に収容されたナット７の厚さＸが取付プレート３の厚さＹよりも小さく設定されているため、図４（ａ）に示すように、ナット７のネジ孔にボルト１０をネジ込んだとき、ナット７のフランジ８が僅かに撓み、被締結部材（Ｌ字状プレート）１１が取付プレート３の平板部９に押し付けられて強固に固定される。このとき、撓んだフランジ８の復元力により、ボルト１０のネジ山とナット７のネジ山とが軸方向に押し付けられ、ボルト１０の緩み止めとなる。 As shown in FIG. 3 (c), the thickness X of the nut 7 housed in the mounting hole 6 is set to be smaller than the thickness Y of the mounting plate 3. Therefore, as shown in FIG. 4 (a). When the bolt 10 is screwed into the screw hole of the nut 7, the flange 8 of the nut 7 is slightly bent, and the member to be fastened (L-shaped plate) 11 is pressed against the flat plate portion 9 of the mounting plate 3 and is firmly fixed. NS. At this time, the restoring force of the bent flange 8 presses the threads of the bolt 10 and the threads of the nut 7 in the axial direction to prevent the bolt 10 from loosening.

（第１変形例）
図４（ｂ）に本発明の第１変形例を示す。この第１変形例に係る溶接部近傍のナット取付構造１ａは、ナット７のフランジ８が取付プレート３の下面に点付け溶接またはロー付けされている点（１２は点付け溶接部またはロー付け部）が図４（ａ）に示す前実施形態と相違し、その他は前実施形態と同様の構成となっている。よって、前実施形態と同様の構成要素には同一の符号を付して説明を省略する。 (First modification)
FIG. 4B shows a first modification of the present invention. The nut mounting structure 1a in the vicinity of the welded portion according to the first modification is a point where the flange 8 of the nut 7 is spot-welded or brazed to the lower surface of the mounting plate 3 (12 is a spot-welded portion or a brazed portion). ) Is different from the previous embodiment shown in FIG. 4 (a), and the other configurations are the same as those of the previous embodiment. Therefore, the same components as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted.

図４（ｂ）に示す第１変形例によれば、ナット７のフランジ８が取付プレート３に点付け溶接またはロー付けされているので、ナット７と取付プレート３とが一体品となり、この一体品を被取付部材（例えばアクスルケース）４に溶接する際、ナット７が脱落することはなく、作業性が向上する。また、点付け溶接は溶接部が小さく、ロー付けは溶接よりも温度が低いため、点付け溶接またはロー付けによるナット７のネジ孔の熱変形が抑えられる。その他、第１変形例の基本的な作用効果は、前実施形態と同様である。 According to the first modification shown in FIG. 4B, since the flange 8 of the nut 7 is spot-welded or brazed to the mounting plate 3, the nut 7 and the mounting plate 3 are integrated. When the product is welded to the member to be attached (for example, the axle case) 4, the nut 7 does not fall off, and workability is improved. Further, since the welded portion is small in spot welding and the temperature of brazing is lower than that of brazing, thermal deformation of the screw hole of the nut 7 due to spot welding or brazing can be suppressed. Other than that, the basic action and effect of the first modification are the same as those of the previous embodiment.

（第２変形例）
図５（ａ）に本発明の第２変形例を示す。この第２変形例に係る溶接部近傍のナット取付構造１ｂは、取付プレート３の平板部９の装着孔６に収容されたナット７の厚さＸが、取付プレート３の平板部９の厚さＹ以上であり（例えばＸ−Ｙ＝２〜３ｍｍ程度）、ナット７のフランジ８が、取付プレート３の下面に点付け溶接またはロー付けされている点（１２は点付け溶接部またはロー付け部）が図４（ａ）に示す最初の実施形態と相違し、その他は最初の実施形態と同様の構成となっている。よって、最初の実施形態と同様の構成要素には同一の符号を付して説明を省略する。 (Second modification)
FIG. 5A shows a second modification of the present invention. In the nut mounting structure 1b near the welded portion according to this second modification, the thickness X of the nut 7 housed in the mounting hole 6 of the flat plate portion 9 of the mounting plate 3 is the thickness of the flat plate portion 9 of the mounting plate 3. It is Y or more (for example, XY = about 2 to 3 mm), and the flange 8 of the nut 7 is spot-welded or brazed to the lower surface of the mounting plate 3 (12 is a spot-welded or brazed portion). ) Is different from the first embodiment shown in FIG. 4 (a), and the other configurations are the same as those of the first embodiment. Therefore, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

図５（ａ）に示す第２変形例によれば、取付プレート３の装着孔６に収容されたナット７の厚さＸが、取付プレート３の厚さＹ以上となっているので、ナット７のネジ孔にボルト１０をネジ込んで被締結部材（Ｌ字状プレート）１１を締結したとき、被締結部材１１の下面と取付プレート３の平板部９の上面との間に隙間（Ｘ−Ｙ）が形成されるものの、ナット７のフランジ８が取付プレート３に点付け溶接またはロー付けされているので、被締結部材１１がガタ付くことを防止できる。また、点付け溶接は溶接部が小さく、ロー付けは溶接よりも温度が低いため、点付け溶接またはロー付けによるナットのネジ孔の熱変形が抑えられる。その他、第２変形例の基本的な作用効果は、最初の実施形態と同様である。 According to the second modification shown in FIG. 5A, the thickness X of the nut 7 housed in the mounting hole 6 of the mounting plate 3 is equal to or larger than the thickness Y of the mounting plate 3, so that the nut 7 When the bolt 10 is screwed into the screw hole of the above to fasten the fastened member (L-shaped plate) 11, there is a gap (XY) between the lower surface of the fastened member 11 and the upper surface of the flat plate portion 9 of the mounting plate 3. ) Is formed, but since the flange 8 of the nut 7 is spot-welded or brazed to the mounting plate 3, it is possible to prevent the member to be fastened 11 from rattling. Further, since the welded portion is small in spot welding and the temperature of brazing is lower than that of brazing, thermal deformation of the screw hole of the nut due to spot welding or brazing can be suppressed. Other than that, the basic action and effect of the second modification are the same as those of the first embodiment.

（第３変形例）
図５（ｂ）に本発明の第３変形例を示す。この第３変形例に係る溶接部近傍のナット取付構造１ｃは、取付プレート３の平板部９の装着孔６に収容されたナット７の厚さＸが、取付プレートの平板部９の厚さＹ以上である点は図５（ａ）に示す第２変形例と同様であるが、ナット７のフランジ８が取付プレート３に点付け溶接またはロー付けされておらず、取付プレート３と被締結部材９との間にスペーサー片１３が介設されている点が第２変形例と相違する。スペーサー片１３は、取付プレート３または被締結部材１１に接着等によって取り付けられている。スペーサー片１３の厚さは、Ｘ−Ｙの寸法より例えば１．５〜２．５ｍｍ程度大きい。また、スペーサー片１３の材質は、取付プレート３の材質および被締結部材（Ｌ字状プレート）１１の材質よりも柔らかい金属が好ましい。その他、第３変形例の基本的な構成は、図４（ａ）に示す最初の実施形態と同様である。 (Third modification example)
FIG. 5B shows a third modification of the present invention. In the nut mounting structure 1c near the welded portion according to the third modification, the thickness X of the nut 7 housed in the mounting hole 6 of the flat plate portion 9 of the mounting plate 3 is the thickness Y of the flat plate portion 9 of the mounting plate. The above points are the same as in the second modification shown in FIG. 5A, but the flange 8 of the nut 7 is not spot-welded or brazed to the mounting plate 3, and the mounting plate 3 and the member to be fastened are not fastened. It differs from the second modification in that the spacer piece 13 is interposed between the spacer piece 13. The spacer piece 13 is attached to the attachment plate 3 or the member to be fastened 11 by adhesion or the like. The thickness of the spacer piece 13 is, for example, about 1.5 to 2.5 mm larger than the dimension of XY. Further, the material of the spacer piece 13 is preferably a metal softer than the material of the mounting plate 3 and the material of the member to be fastened (L-shaped plate) 11. Other than that, the basic configuration of the third modification is the same as that of the first embodiment shown in FIG. 4 (a).

図５（ｂ）に示す第３変形例によれば、取付プレート３と被締結部材１１との間にスペーサー片１３が介設されているので、ナット７のネジ孔にボルト１０をネジ込んで被締結部材１１を締結したとき、スペーサー片１３が僅かに潰れると共にナット７のフランジ８が僅かに撓み、被締結部材１１が強固に固定される。このとき、潰れたスペーサー片１３および撓んだフランジ８の復元力により、ボルト１０のネジ山とナット７のネジ山とが軸方向に押し付けられ、ボルト１０の緩み止めとなる。その他、第３変形例の基本的な作用効果は、最初の実施形態と同様である。 According to the third modification shown in FIG. 5B, since the spacer piece 13 is interposed between the mounting plate 3 and the member to be fastened 11, the bolt 10 is screwed into the screw hole of the nut 7. When the member to be fastened 11 is fastened, the spacer piece 13 is slightly crushed and the flange 8 of the nut 7 is slightly bent, so that the member to be fastened 11 is firmly fixed. At this time, the restoring force of the crushed spacer piece 13 and the bent flange 8 presses the threads of the bolt 10 and the threads of the nut 7 in the axial direction to prevent the bolt 10 from loosening. Other than that, the basic action and effect of the third modification are the same as those of the first embodiment.

以上、添付図面を参照しつつ本発明の好適な実施形態について説明したが、本発明は上述した実施形態に限定されないことは勿論であり、特許請求の範囲に記載された範疇における各種の変更例または修正例についても、本発明の技術的範囲に属することは言うまでもない。 Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, and various modifications in the scope of claims are described. It goes without saying that the modified examples also belong to the technical scope of the present invention.

本発明は、溶接部からナットまでの距離が短い場合であっても溶接熱によるネジ部の変形を抑制でき、ナットの高さ方向の取付スペースを可及的に削減でき、締付トルクを稼ぐことができる溶接部近傍のナット取付構造に利用できる。 According to the present invention, even when the distance from the welded portion to the nut is short, deformation of the threaded portion due to welding heat can be suppressed, the mounting space in the height direction of the nut can be reduced as much as possible, and tightening torque can be obtained. It can be used for nut mounting structures near welds.

１溶接部近傍のナット取付構造
２折曲部
３取付プレート
４被取付部材
５溶接ビード
６装着孔
７ナット
８フランジ
９取付プレートの折曲部以外の部分としての平板部
１０ボルト
１１被締結部材
１２点付け溶接部またはロー付け部
Ｗ隙間
Ｃクリアランス
Ｘ取付プレートの装着孔に収容されたナットの厚さ
Ｙ取付プレートの厚さ 1 Nut mounting structure near the welded part 2 Folded part 3 Mounting plate 4 Attached member 5 Welded bead 6 Mounting hole 7 Nut 8 Flange 9 Flat plate part 10 Bolt 11 Fastened member 12 as a part other than the bent part of the mounting plate Spot welded part or brazed part W Gap C Clearance X Thickness of nut housed in mounting hole of mounting plate Y Thickness of mounting plate

Claims

A mounting plate with a bend at the edge,
A weld bead formed by welding the bent portion of the mounting plate to the member to be mounted, and
A gap formed between a portion of the mounting plate other than the bent portion and the mounted member,
A polygonal or elongated mounting hole formed through a portion of the mounting plate other than the bent portion,
A nut that is formed to have the same shape as the mounting hole and is non-rotatably housed in the mounting hole through a clearance.
A flange extending from the nut into the gap,
A nut mounting structure near the welded part, which is characterized by being equipped with.

The nut mounting structure in the vicinity of a welded portion according to claim 1, wherein the thickness of the nut housed in the mounting hole of the mounting plate is less than the thickness of the mounting plate.

The nut mounting structure in the vicinity of a welded portion according to claim 1 or 2, wherein the flange of the nut housed in the mounting hole of the mounting plate is spot-welded or brazed to the mounting plate.

The feature is that the thickness of the nut housed in the mounting hole of the mounting plate is equal to or larger than the thickness of the mounting plate, and the flange of the nut is spot-welded or brazed to the mounting plate. The nut mounting structure in the vicinity of the welded portion according to claim 1.

The welding according to any one of claims 1 to 4, wherein a bolt is screwed into the nut, and a member to be fastened is sandwiched between the bolt and the nut. Nut mounting structure near the part.