JP2806193B2 - Resin cover fastening structure - Google Patents

Resin cover fastening structure

Info

Publication number
JP2806193B2
JP2806193B2 JP5002476A JP247693A JP2806193B2 JP 2806193 B2 JP2806193 B2 JP 2806193B2 JP 5002476 A JP5002476 A JP 5002476A JP 247693 A JP247693 A JP 247693A JP 2806193 B2 JP2806193 B2 JP 2806193B2
Authority
JP
Japan
Prior art keywords
resin cover
bolt
rib
mounting
ribs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP5002476A
Other languages
Japanese (ja)
Other versions
JPH06207699A (en
Inventor
靖 日比野
忠義 河野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP5002476A priority Critical patent/JP2806193B2/en
Publication of JPH06207699A publication Critical patent/JPH06207699A/en
Application granted granted Critical
Publication of JP2806193B2 publication Critical patent/JP2806193B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members

Landscapes

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Connection Of Plates (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は樹脂カバーの締着構造に
関する。本発明は例えば車両の内燃機関のタイミングベ
ルトカバー等に適用できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin cover fastening structure. The present invention is applicable to, for example, a timing belt cover of an internal combustion engine of a vehicle.

【０００２】[0002]

【従来の技術】近年、産業界では、軽量化等のため金属
カバーに代えて樹脂カバーが採用されつつある。樹脂カ
バーの締着構造として、図８に示す様に、樹脂カバー１
００のボス部１０１に金属製のカラー２００を圧入する
と共に、カラー２００のボルト挿通孔２０１を基体３０
０の螺孔３０１に対面させ、その状態で、取付ボルト４
００をボルト挿通孔２０１に挿通すると共に、取付ボル
ト４００の雄螺子部４００ａを螺孔３０１に螺着した構
造のものが知られている。このものでは、取付ボルト４
００のボルト頭部４０１の座面４０２がカラー２００の
軸端面２０５に着座しており、従って、取付ボルト４０
０の締着力は主としてカラー２００で負担され、締着に
おける樹脂カバー１００の破損、樹脂クリープ現象に起
因する取付ボルト４００の緩みが防止されている。2. Description of the Related Art In recent years, a resin cover has been adopted in the industry in place of a metal cover to reduce the weight. As shown in FIG. 8, a resin cover 1 is used as a fastening structure for the resin cover.
The metal collar 200 is press-fitted into the boss 101 of the base 200 and the bolt insertion hole 201 of the collar 200 is inserted into the base 30.
0 screw hole 301, and in that state, the mounting bolt 4
00 is inserted into the bolt insertion hole 201 and the male screw portion 400a of the mounting bolt 400 is screwed into the screw hole 301. In this case, the mounting bolt 4
00 is seated on the shaft end surface 205 of the collar 200, and thus the mounting bolt 40
The tightening force of 0 is mainly borne by the collar 200, thereby preventing the resin cover 100 from being damaged in tightening and the mounting bolt 400 from loosening due to the resin creep phenomenon.

【０００３】また、従来より、図９に示す様に、カラー
２００の周囲を１周する様な環状のリブ５００を樹脂カ
バー１００に一体的に形成した構造も知られている（実
開昭５７−７３４０６号公報）。このものは、前記した
取付ボルト４００のボルト頭部４０１の座面４０２でリ
ブ５００を潰す方式である。しかし、上記公報に係る構
造では、カラー２００やリブ５００等の寸法公差の関係
でリブ５００の潰れが不充分のまま樹脂カバー１００が
締着されることもある。この場合、径大なボルト頭部４
０１でリブ５００が隠れるので、リブ５００の潰れが視
認できず、従って、締着力が不足しても作業中に判別で
きない。そのため、締着の信頼性が必ずしも充分ではな
く、使用の段階で樹脂カバー１００がずれ変位し易く、
異音や騒音の要因となることがある。Conventionally, as shown in FIG. 9, there is also known a structure in which an annular rib 500 is formed integrally with a resin cover 100 so as to make a full circumference around the collar 200 (see FIG. -73406). This is a method in which a rib 500 is crushed by a seating surface 402 of a bolt head 401 of the mounting bolt 400 described above. However, in the structure according to the above publication, the resin cover 100 may be fastened while the ribs 500 are not sufficiently crushed due to dimensional tolerances of the collar 200, the ribs 500, and the like. In this case, the large bolt head 4
Since the rib 500 is hidden at 01, the collapse of the rib 500 cannot be visually recognized. Therefore, even if the fastening force is insufficient, it cannot be determined during the work. Therefore, the reliability of the fastening is not always sufficient, and the resin cover 100 is easily displaced and displaced at the stage of use,
May cause abnormal noise and noise.

【０００４】更に、上記公報に係る構造では、図９から
理解できる様に、リブ５００がカラー２００の周囲を１
周する様な環状であるため、成形の際における樹脂の合
流線であり強度低下の要因となるウエルド部が発生する
場合には、ウエルド部が環状のリブ５００に発生し易
く、そのためウエルド部にも締着力が直接作用し、環状
のリブ５００を備えたボス部１０８に割れが発生するお
それがある。Further, in the structure according to the above publication, as can be understood from FIG.
In the case where a weld portion which is a merging line of the resin at the time of molding and causes a decrease in strength occurs due to the annular shape, the weld portion is likely to be formed on the annular rib 500, and therefore the weld portion is formed. Also, the fastening force acts directly, and there is a possibility that the boss 108 having the annular rib 500 may be cracked.

【０００５】[0005]

【発明が解決しようとする課題】本発明は上記した実情
に鑑みなされたものであり、ボルト挿通孔に対して放射
方向にのびると共にボルト頭部等の座頭部の座面よりも
径外方向に延在する樹脂製の複数個の突条リブを形成す
ることにより、取付具による締着状態を確認でき、締着
の信頼性を高め得る樹脂カバーの締着構造を提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and extends radially to a bolt insertion hole and extends radially outward from a seat surface of a seat head such as a bolt head. An object of the present invention is to provide a fastening structure of a resin cover which can confirm a fastening state by a mounting tool by forming a plurality of extending ribs made of a resin and extend the reliability of fastening. .

【０００６】[0006]

【課題を解決するための手段】本発明に係る樹脂カバー
の締着構造は、取付孔を備えた基体と、取付孔に対面す
るボルト挿通孔をもつボス部を備え、基体の少なくとも
一部を覆う樹脂カバーと、樹脂カバーのボルト挿通孔に
挿通されると共に基体の取付孔に取付けられるボルト軸
部と、ボス部に着座する座頭部とを備え、樹脂カバーを
基体に締着する取付具とで構成された樹脂カバーの締着
構造において、樹脂カバーのボス部は、座頭部の座面に
対面すると共に該ボルト挿通孔に対して放射方向にの
び、かつ該座頭部の座面よりも径外方向に延在する樹脂
製の複数個の突条リブを備えていることを特徴とするも
のである。A fastening structure for a resin cover according to the present invention comprises a base having a mounting hole, a boss having a bolt insertion hole facing the mounting hole, and at least a part of the base. A mounting member that includes a resin cover to be covered, a bolt shaft portion that is inserted into the bolt insertion hole of the resin cover and is attached to the mounting hole of the base, and a seat head that sits on the boss portion, and fastens the resin cover to the base. In the fastening structure of the resin cover, the boss portion of the resin cover faces the seat surface of the seat head, extends radially with respect to the bolt insertion hole, and has a diameter larger than the seat surface of the seat head. It is characterized in that it comprises a plurality of resinous ribs extending outward.

【０００７】取付具の座頭部は、取付ボルトのボルト頭
部、あるいは、取付ボルトに螺合するナットで構成でき
る。[0007] The seat head of the mounting fixture can be constituted by a bolt head of a mounting bolt or a nut screwed into the mounting bolt.

【０００８】[0008]

【作用】ボルト挿通孔に対して放射方向にのびかつ座頭
部の座面よりも径外方向に延在する樹脂製の複数個の突
条リブが設けられている。そのため、取付具による締着
の際に、突条リブのうち座頭部の座面に対面する領域は
潰れ、座面に対面していない領域は潰れない。故に突条
リブに段差が生じる。この段差により、突条リブの潰れ
が確認され、ひいては取付具による締着状態は確認され
る。A plurality of ridge ribs made of resin extend radially from the bolt insertion hole and extend radially outward from the seat surface of the seat head. Therefore, at the time of fastening by the attachment, the region of the ridge rib facing the seating surface of the seat head is crushed, and the region not facing the seating surface is not crushed. Therefore, a step occurs in the ridge rib. Due to this step, the ridge rib is confirmed to be crushed, and furthermore, the fastening state by the attachment is confirmed.

【０００９】[0009]

【実施例】車両の内燃機関のタイミングベルトカバーに
適用した一実施例を図１〜図４を参照して説明する。図
１に示す様に、内燃機関を構成する基体としての金属製
のシリンダブロック１の所定場所には、取付孔としての
螺孔１０が貫通形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment applied to a timing belt cover of an internal combustion engine of a vehicle will be described with reference to FIGS. As shown in FIG. 1, a screw hole 10 as a mounting hole is formed through a predetermined position of a metal cylinder block 1 as a base constituting the internal combustion engine.

【００１０】樹脂カバー２はポリプロピレン製であり、
他の部位よりも厚肉である適数個のボス部２０を備えて
いる。各ボス部２０には貫通孔２１が形成されている。
貫通孔２１の一方の端にはリング状の溝部２３が形成さ
れている。貫通孔２１には円筒状の金属製のカラー３が
圧入されて保持されている。カラー３の内周面によりボ
ルト挿通孔３０が形成されている。The resin cover 2 is made of polypropylene,
An appropriate number of bosses 20 which are thicker than other parts are provided. Each boss portion 20 has a through hole 21 formed therein.
A ring-shaped groove 23 is formed at one end of the through hole 21. The cylindrical metal collar 3 is pressed into the through hole 21 and held. A bolt insertion hole 30 is formed by the inner peripheral surface of the collar 3.

【００１１】取付具としての取付ボルト４は、雄螺子部
４０ｃを有するボルト軸部４０と、ボルト軸部４０と一
体的をなす座頭部としてのボルト頭部４２とを備えてい
る。ボルト頭部４２は、略６角形状であり、径大な座面
４２ａを備えたフランジ部４２ｒを一体的に有する。図
３及び図４に示す様に、樹脂カバー２のボス部２０に
は、４個の突条リブ２４が放射状に突設されている。図
１から理解できる様に、突条リブ２４は、ボルト頭部４
２の座面４２ａに対面していると共に、フランジ部４２
ｒの座面４２ａの外縁よりも径外方向に延在している。
その結果、突条リブ２４の内端２４ｃは溝部２３に至
り、かつ、突条リブ２４の外端２４ｄはボルト頭部４２
よりも径外側に位置している。The mounting bolt 4 as a mounting tool includes a bolt shaft 40 having a male screw portion 40c, and a bolt head 42 as a seat integral with the bolt shaft 40. The bolt head 42 has a substantially hexagonal shape and integrally has a flange portion 42r provided with a large-diameter seat surface 42a. As shown in FIGS. 3 and 4, four ridge ribs 24 are radially protruded from the boss portion 20 of the resin cover 2. As can be understood from FIG.
2 and the flange portion 42
r extends radially outward from the outer edge of the seat surface 42a.
As a result, the inner end 24c of the ridge rib 24 reaches the groove 23, and the outer end 24d of the ridge rib 24 is
It is located on the radial outside.

【００１２】ここで取付ボルト４を締着する前の状態の
寸法関係は、図３、図４において、突条リブ２４の幅Ｌ
１が１〜２ｍｍ程度、突条リブ２４の外端２４ｄ間の径
Ｄ１は１７ｍｍ程度、突条リブ２４の内端２４ｃ間の径
Ｄ２は１１ｍｍ程度、突条リブ２４の高さＨ１が１〜
１．５ｍｍ程度、ボス部２０の厚みＴ１が８ｍｍ程度と
されており、また、カラー３の軸端面３ｂは、ボス部２
０の上面２０ｉよりも０．５ｍｍ程度高く、突条リブ２
４の上面よりも１ｍｍ程度低くされている。Here, the dimensional relationship in the state before the mounting bolt 4 is tightened is shown in FIGS.
1 is about 1 to 2 mm, the diameter D1 between the outer ends 24d of the ribs 24 is about 17 mm, the diameter D2 between the inner ends 24c of the ribs 24 is about 11 mm, and the height H1 of the ribs 24 is 1 to 1 mm.
The thickness T1 of the boss 20 is about 8 mm, and the shaft end face 3b of the collar 3 is
0 about 0.5 mm higher than the upper surface 20i of the
4 is about 1 mm lower than the upper surface.

【００１３】本実施例では、樹脂カバー２を取付けるに
あたり、図１から理解できる様に、ボルト挿通孔３０が
螺孔１０に対面する様に樹脂カバー２をシリンダブロッ
ク１の面１ｆに被せると共に、取付ボルト４をボルト挿
通孔３０に挿通し、その取付ボルト４を回してこれのボ
ルト軸部４０の雄螺子部４０ｃを螺孔１０に螺着する。In this embodiment, when the resin cover 2 is mounted, as shown in FIG. 1, the resin cover 2 is placed on the surface 1f of the cylinder block 1 such that the bolt insertion hole 30 faces the screw hole 10, and The mounting bolt 4 is inserted into the bolt insertion hole 30, and the male screw 40 c of the bolt shaft 40 is screwed into the screw hole 10 by turning the mounting bolt 4.

【００１４】この状態では、突条リブ２４のうち、ボル
ト頭部４２の座面４２ａに対面する領域は潰れて圧潰部
２４ｈとなる。即ち、突条リブ２４のうち、ボルト頭部
４２の座面４２ａに対面する領域は潰れ、座面４２ａに
対面していない領域は潰れないため、突条リブ２４に段
差２９が生じる。この段差２９により、突条リブ２４の
潰れが視認され、取付ボルト４による締着状態は確認可
能となる。In this state, the region of the ridge rib 24 facing the bearing surface 42a of the bolt head 42 is crushed to form a crushed portion 24h. That is, in the protruding rib 24, a region facing the seat surface 42a of the bolt head 42 is crushed, and a region not facing the seat surface 42a is not crushed. The step 29 allows the ridge rib 24 to be visually confirmed as being crushed, so that the tightening state of the mounting bolt 4 can be confirmed.

【００１５】なお、万一、段差２９が生じない場合に
は、カラー３の軸端面３ｂが突条リブ２４よりも突出し
ているので、カラー３を交換して再締着する。本実施例
では、取付ボルト４により締着した状態では、図１から
理解できる様に、カラー３の一方の軸端面３ａがシリン
ダブロック１に当接すると共に、ボルト頭部４２の座面
４２ａがカラー３の他方の軸端面３ｂに着座して当接す
る。これにより取付ボルト４の締着力（一般的には３０
０〜５００ｋｇｆ）は主として金属製のカラー３で負担
される。If the step 29 does not occur, the shaft end face 3b of the collar 3 projects beyond the ridge rib 24. Therefore, the collar 3 is replaced and retightened. In the present embodiment, in a state where it is fastened by the mounting bolts 4, as can be understood from FIG. 1, one shaft end surface 3a of the collar 3 contacts the cylinder block 1 and the seat surface 42a of the bolt head 42 is 3 is seated on and abuts on the other shaft end face 3b. Thereby, the fastening force of the mounting bolt 4 (generally 30
0 to 500 kgf) is mainly borne by the metal collar 3.

【００１６】本実施例では、前述した様に、取付ボルト
４のボルト頭部４２の座面４２ａがカラー３の軸端面３
ｂに圧接しカラー３が固定されていると共に、カラー３
が樹脂カバー２に圧入されているので、樹脂カバー２を
シリンダブロック１に固定する力は確保される。しかも
ボルト頭部４２の座面４２ａが樹脂カバー２の突条リブ
２４を圧潰しているので、樹脂カバー２を固定する力は
一層確保され、矢印Ｘ１、Ｘ２方向における樹脂カバー
２のずれ変位は防止される。In this embodiment, as described above, the seat surface 42a of the bolt head 42 of the mounting bolt 4 is
b and the collar 3 is fixed.
Is pressed into the resin cover 2 so that the force for fixing the resin cover 2 to the cylinder block 1 is secured. Moreover, since the seat surface 42a of the bolt head 42 crushes the ridge rib 24 of the resin cover 2, the force for fixing the resin cover 2 is further secured, and the displacement of the resin cover 2 in the directions of arrows X1 and X2 is reduced. Is prevented.

【００１７】また本実施例では、突条リブ２４が放射状
に形成されているので、環状のリブ５００を備えた図９
に示す従来例に比較して、突条リブ２４が潰れ易い利点
が得られる。更にまた本実施例では、突条リブ２４が放
射状に形成されているので、突条リブ２４の位相を調整
すれば、ウエルドの位置を避けて突条リブ２４を設定す
るのに有利となり、ウエルドによる強度低下を回避する
のに貢献できる。また本実施例では、座面４２ａとカラ
ー３の軸端面３ｂとの当接具合を視認することもできる
ため、カラー３とリブ２４との寸法関係の誤差により、
カラー３の軸端面３ｂに座面４２ａが当接しておらず隙
間が確認されれば、さらに増し締めを行うことにより、
確実な締着を確保することができる。Further, in this embodiment, since the protruding ribs 24 are formed radially, FIG.
In comparison with the conventional example shown in FIG. Furthermore, in this embodiment, since the ribs 24 are formed radially, if the phase of the ribs 24 is adjusted, it is advantageous to set the ribs 24 avoiding the weld position, and it is advantageous to set the weld ribs. This can contribute to avoiding a decrease in strength due to Further, in this embodiment, since the contact condition between the seat surface 42a and the shaft end surface 3b of the collar 3 can be visually recognized, an error in the dimensional relationship between the collar 3 and the rib 24 causes
If the seat surface 42a is not in contact with the shaft end surface 3b of the collar 3, and a gap is confirmed, by further tightening,
Reliable fastening can be ensured.

【００１８】（他の例）本発明の他の実施例を図５に示
す。この例も前記した実施例と基本的には同様の構成で
あり、同様の作用効果が得られる。但し、この例ではカ
ラー３は設けられていない。また、取付ボルト４は、大
径部４７ａ、段部４７ｂ及び小径部４７ｃを備えた段付
ボルト軸部４７をもつ。そして、取付ボルト４の段部４
７ｂをシリンダブロック１に当接させた状態で、小径部
４７ｃの雄螺子部４７ｅを螺孔１０に螺着する。これに
より、ボルト頭部４２のフランジ部４２ｒで突条リブ２
４を潰し、段差２９を形成し、以て樹脂カバー２が締着
される。FIG. 5 shows another embodiment of the present invention. This embodiment has basically the same configuration as the above-described embodiment, and the same operation and effect can be obtained. However, in this example, the collar 3 is not provided. Further, the mounting bolt 4 has a stepped bolt shaft portion 47 having a large diameter portion 47a, a step portion 47b, and a small diameter portion 47c. And the step 4 of the mounting bolt 4
The male screw portion 47e of the small diameter portion 47c is screwed into the screw hole 10 with the 7b abutting on the cylinder block 1. As a result, the ridge rib 2 is formed at the flange portion 42r of the bolt head 42.
4 is crushed to form a step 29, whereby the resin cover 2 is fastened.

【００１９】この例でも、前記した実施例と同様に、突
条リブ２４のうちボルト頭部４２の座面４２ａに対面す
る領域が潰れて圧潰部２４ｈとなっているので、突条リ
ブ２４に段差２９が生じ、締着の状態を確認できる。こ
の例では、締着した状態では、取付ボルト４の大径部４
７ａの外周面と貫通孔２１の内周面との間にリング状の
隙間４８が形成される。この隙間４８は樹脂カバー２等
の寸法公差を吸収するのに役立つ。なお、隙間４８の厚
みＴ３は１ｍｍ程度である。In this example, similarly to the above-described embodiment, the region of the protruding rib 24 facing the seat surface 42a of the bolt head 42 is crushed to form a crushed portion 24h. A step 29 is generated, and the state of the fastening can be confirmed. In this example, the large-diameter portion 4
A ring-shaped gap 48 is formed between the outer peripheral surface of 7 a and the inner peripheral surface of the through hole 21. The gap 48 serves to absorb dimensional tolerances of the resin cover 2 and the like. The thickness T3 of the gap 48 is about 1 mm.

【００２０】ところで、取付ボルト４による締着力が種
々の事情により低下した場合、隙間４８のぶん樹脂カバ
ー２が矢印Ｘ１、Ｘ２方向にずれ変位するおそれがあ
る。例えば、車両走行時における加速度及び樹脂カバー
２の質量を考慮すると、一般的には、樹脂カバー２には
約３ｋｇｆ程度の力が作用するため、取付ボルト４によ
る締着力が低下した場合には、樹脂カバー２がずれ変位
するおそれがある。この点この例では、突条リブ２４の
段差２９により樹脂カバー２はボルト頭部４２のフラン
ジ部４２ｒに係合しているので、樹脂カバー２の動きは
規制され、矢印Ｘ１、Ｘ２方向における樹脂カバー２の
ずれ変位が防止される。When the fastening force of the mounting bolt 4 is reduced due to various circumstances, the resin cover 2 may be displaced in the gaps 48 in the directions of the arrows X1 and X2. For example, in consideration of the acceleration during traveling of the vehicle and the mass of the resin cover 2, generally, a force of about 3 kgf acts on the resin cover 2. Therefore, when the fastening force by the mounting bolt 4 is reduced, The resin cover 2 may be displaced and displaced. In this regard, in this example, since the resin cover 2 is engaged with the flange portion 42r of the bolt head 42 by the step 29 of the ridge rib 24, the movement of the resin cover 2 is restricted, and the resin in the directions of arrows X1 and X2. The displacement of the cover 2 is prevented.

【００２１】さて、上記した図１に示す実施例における
突条リブ２４の寸法関係は、上記した値に限られるもの
ではなく、樹脂カバー２の材質等に応じて適宜変更でき
るものである。また、上記した実施例における突条リブ
２４の数は４本であるが、これに限られるものなく、図
７（Ａ）に示す様に６本、あるいは、他の本数に増加す
ることもできる。また、図７（Ｂ）に示す様に突条リブ
２４の幅Ｌ４も突条リブ２４の内端２４ｃに向かうにつ
れて幅広となる様な構成にできる。あるいは逆に、突条
リブ２４の内端２４ｃに向かうにつれて幅狭となる様に
構成にもできる。The dimensional relationship of the ribs 24 in the embodiment shown in FIG. 1 is not limited to the above-mentioned value, but can be changed as appropriate according to the material of the resin cover 2 and the like. Although the number of the ribs 24 in the above-described embodiment is four, the number is not limited thereto, and may be increased to six as shown in FIG. 7A or another number. . Also, as shown in FIG. 7B, the width L4 of the ridge rib 24 can be configured to become wider toward the inner end 24c of the ridge rib 24. Or, conversely, the width may be narrower toward the inner end 24c of the rib rib 24.

【００２２】その他、本発明は上記しかつ図面に示した
実施例のみに限定されるものではなく、例えば、樹脂カ
バー２の材質は上記したものに限定されるものではな
く、要旨を逸脱しない範囲内で適宜変更して実施し得る
ものである。 （適用例）図６は適用例を示す。図６に示す様に、内燃
機関にはタイミングベルトカバーとして機能する樹脂カ
バー２Ａ、２Ｂが装備されている。In addition, the present invention is not limited to the embodiment described above and shown in the drawings. For example, the material of the resin cover 2 is not limited to the above-described one, and the scope of the present invention is not limited to the above. It can be carried out by appropriately changing it. (Application Example) FIG. 6 shows an application example. As shown in FIG. 6, the internal combustion engine is equipped with resin covers 2A and 2B that function as timing belt covers.

【００２３】[0023]

【発明の効果】本発明によれば、ボルト挿通孔に対して
放射方向にのびると共にボルト頭部等の座頭部の座面よ
りも径外方向に延在する樹脂製の複数個の突条リブを形
成しているので、突条リブのうち、取付具の座頭部の座
面に対面する領域は潰れ、座面に対面していない領域は
潰れない。そのため突条リブに段差が生じ、この段差に
より、取付具による締着状態は確認される。従って、突
条リブの潰れが不充分のまま、樹脂カバーが締着される
不具合を回避するのに有利である。According to the present invention, a plurality of resin ribs extend radially from the bolt insertion hole and extend radially outward from the seat surface of the seat head such as the bolt head. Is formed, the area of the ridge rib facing the seat surface of the seat head of the mounting tool is crushed, and the area not facing the seat surface is not crushed. For this reason, a step is generated in the rib, and the state of the fastening by the mounting fixture is confirmed by the step. Therefore, it is advantageous to avoid the problem that the resin cover is fastened while the ridge ribs are not sufficiently collapsed.

【００２４】更に本発明によれば、突条リブが放射状に
形成されているので、ウエルドの位置を避けて突条リブ
を設定するのに有利となり、ウエルドによる強度低下を
回避するのに貢献できる。Further, according to the present invention, since the ridge ribs are formed radially, it is advantageous to set the ridge ribs while avoiding the position of the weld, and can contribute to avoiding a decrease in strength due to the weld. .

【図面の簡単な説明】[Brief description of the drawings]

【図１】樹脂カバーを締着した状態の要部の断面図であ
る。FIG. 1 is a sectional view of a main part in a state where a resin cover is fastened.

【図２】図１の主要部の拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.

【図３】突条リブ付近の平面図である。FIG. 3 is a plan view showing the vicinity of a rib.

【図４】突条リブ付近の断面図である。FIG. 4 is a cross-sectional view of the vicinity of a rib.

【図５】第２実施例に係る樹脂カバーを締着した状態の
要部の断面図である。FIG. 5 is a cross-sectional view of a main part in a state where a resin cover according to a second embodiment is fastened.

【図６】適用例に係る内燃機関の正面図である。FIG. 6 is a front view of an internal combustion engine according to an application example.

【図７】（Ａ）（Ｂ）は他の例に係る突条リブ付近の平
面図である。FIGS. 7A and 7B are plan views of the vicinity of a ridge rib according to another example.

【図８】従来例に係る樹脂カバーを締着した状態の要部
の断面図である。FIG. 8 is a cross-sectional view of a main part in a state where a resin cover according to a conventional example is fastened.

【図９】他の従来例に係る樹脂カバーのリブ付近の斜視
図である。FIG. 9 is a perspective view of the vicinity of a rib of a resin cover according to another conventional example.

【符号の説明】[Explanation of symbols]

図中、１はシリンダブロック（基体）、１０は螺孔（取
付孔）、２は樹脂カバー、２０はボス部、２４は突条リ
ブ、２４ｄは外端、３はカラー、３０はボルト挿通孔、
４は取付ボルト（取付具）、４２はボルト頭部（座頭
部）、４２ａは座面を示す。In the drawing, 1 is a cylinder block (base), 10 is a screw hole (mounting hole), 2 is a resin cover, 20 is a boss, 24 is a ridge rib, 24d is an outer end, 3 is a collar, and 30 is a bolt insertion hole. ,
Reference numeral 4 denotes a mounting bolt (mounting tool), 42 denotes a bolt head (seat head), and 42a denotes a seat surface.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】取付孔を備えた基体と、 該取付孔に対面するボルト挿通孔をもつボス部を備え、
該基体の少なくとも一部を覆う樹脂カバーと、 該樹脂カバーのボルト挿通孔に挿通されると共に該基体
の取付孔に取付けられるボルト軸部と、該ボス部に着座
する座頭部とを備え、該樹脂カバーを該基体に締着する
取付具とで構成された樹脂カバーの締着構造において、 該樹脂カバーの該ボス部は、 該座頭部の座面に対面すると共に該ボルト挿通孔に対し
て放射方向にのび、かつ該座頭部の座面よりも径外方向
に延在する樹脂製の複数個の突条リブを備えていること
を特徴とする樹脂カバーの締着構造。A base having an attachment hole; a boss having a bolt insertion hole facing the attachment hole;
A resin cover that covers at least a part of the base, a bolt shaft portion that is inserted into a bolt insertion hole of the resin cover and is attached to a mounting hole of the base, and a seat head that is seated on the boss portion; In the fastening structure of the resin cover, comprising a mounting member for fastening the resin cover to the base, the boss portion of the resin cover faces the seating surface of the seat head and is inserted into the bolt insertion hole. A resin cover fastening structure, comprising a plurality of resinous ribs extending in a radial direction and extending radially outward from a seating surface of the seat head.
JP5002476A 1993-01-11 1993-01-11 Resin cover fastening structure Expired - Lifetime JP2806193B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5002476A JP2806193B2 (en) 1993-01-11 1993-01-11 Resin cover fastening structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5002476A JP2806193B2 (en) 1993-01-11 1993-01-11 Resin cover fastening structure

Publications (2)

Publication Number Publication Date
JPH06207699A JPH06207699A (en) 1994-07-26
JP2806193B2 true JP2806193B2 (en) 1998-09-30

Family

ID=11530394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5002476A Expired - Lifetime JP2806193B2 (en) 1993-01-11 1993-01-11 Resin cover fastening structure

Country Status (1)

Country Link
JP (1) JP2806193B2 (en)

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* Cited by examiner, † Cited by third party
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JP3414897B2 (en) * 1995-08-11 2003-06-09 日本精工株式会社 Linear motion bearing device
JPH09112552A (en) * 1995-10-13 1997-05-02 Nippon Seiko Kk Direct acting guide bearing device
JPH1159337A (en) * 1997-08-15 1999-03-02 Asmo Co Ltd Vehicular part and structure for installing the same
ES2185291T3 (en) * 1998-04-17 2003-04-16 Demag Cranes & Components Gmbh SPINNING TORQUE SUPPORT.
JP3447681B2 (en) * 2000-08-30 2003-09-16 日本サーボ株式会社 Mounting structure of resin cover
JP2003156040A (en) * 2002-08-30 2003-05-30 Nsk Ltd Linear motion guide bearing device
JP2005351354A (en) * 2004-06-10 2005-12-22 Ryosei Electro-Circuit Systems Ltd Bolted structure
DE502005001771D1 (en) * 2004-10-20 2007-12-06 Luk Lamellen & Kupplungsbau Arrangement for fastening a plastic component to a carrier part
JP4116038B2 (en) * 2006-01-16 2008-07-09 日本精工株式会社 Linear motion guide bearing device
JP2007263300A (en) * 2006-03-29 2007-10-11 Toyota Motor Corp Fastening structure and manufacturing method of resin member
JP4501887B2 (en) * 2006-03-31 2010-07-14 ブラザー工業株式会社 Inkjet head
JP2009101912A (en) * 2007-10-24 2009-05-14 Nissan Motor Co Ltd Front end module mounting structure
JP2009145790A (en) * 2007-12-18 2009-07-02 Sanyo Electric Co Ltd Exterior structure and method of constitution the same
DE102010045669A1 (en) * 2009-10-12 2011-04-21 Mann+Hummel Gmbh filter means
JP5845030B2 (en) * 2011-09-22 2016-01-20 積水樹脂株式会社 Gaze guidance mark installation structure
JP6313102B2 (en) * 2014-04-11 2018-04-18 サカエ理研工業株式会社 Mirror device for vehicle
JP6521585B2 (en) * 2014-07-30 2019-05-29 キヤノン株式会社 Drive transmission device and recording device
JP2018091368A (en) * 2016-11-30 2018-06-14 アイシン精機株式会社 Resin member fitting structure
JP7239318B2 (en) * 2018-12-27 2023-03-14 サカエ理研工業株式会社 Vehicle mirror device
JP2021025601A (en) * 2019-08-07 2021-02-22 トヨタ紡織株式会社 Fastening structure
JP7407640B2 (en) * 2020-03-27 2024-01-04 古河電気工業株式会社 Fixed body mounting structure
JP2024044709A (en) * 2022-09-21 2024-04-02 住友電装株式会社 connector

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