JP2000183551A - Electrical connection box - Google Patents
Electrical connection boxInfo
- Publication number
- JP2000183551A JP2000183551A JP10360913A JP36091398A JP2000183551A JP 2000183551 A JP2000183551 A JP 2000183551A JP 10360913 A JP10360913 A JP 10360913A JP 36091398 A JP36091398 A JP 36091398A JP 2000183551 A JP2000183551 A JP 2000183551A
- Authority
- JP
- Japan
- Prior art keywords
- bolt insertion
- insertion hole
- lower case
- mounting
- connection box
- 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.)
- Granted
Links
Landscapes
- Casings For Electric Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合成樹脂により一
体に形成され、箱本体の外周部に環状の形成部を備えた
電気接続箱に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box integrally formed of a synthetic resin and provided with an annular formed portion on the outer periphery of a box body.
【０００２】[0002]
【従来の技術】従来から車両に取り付けられる電気接続
箱は合成樹脂により一体成形され、図５，６に示すよう
に、電装部品を収容するロアケース３０と同ロアケース
３０に嵌合されるアッパーケース（図示略）とからなる
箱本体を備えている。ロアケース３０の外周部にはボル
ト挿通孔３２を有する取付部３１が一体に形成されてい
る。2. Description of the Related Art Conventionally, an electric connection box mounted on a vehicle is integrally formed of a synthetic resin, and as shown in FIGS. 5 and 6, a lower case 30 for accommodating electric parts and an upper case (fitted to the lower case 30). (Not shown). An attachment portion 31 having a bolt insertion hole 32 is integrally formed on the outer periphery of the lower case 30.
【０００３】この取付部３１はボルトの締め付け力に耐
えられるように厚肉に形成されているが、厚肉のままで
は成形後のひけによる取付部３１の変形が生じるため、
図６に示すように、取付部３１全体に肉抜きを行って薄
肉部３３を形成するとともに、ボルト挿通孔３２の周囲
に環状の補強リブ３４を形成するとともに、同挿通孔３
２から放射状に延びる補強リブ３５を形成している。[0003] The mounting portion 31 is formed to be thick so as to withstand the tightening force of the bolt. However, if the thickness is large, the mounting portion 31 is deformed due to sink after molding.
As shown in FIG. 6, a thin portion 33 is formed by removing the thickness of the entire mounting portion 31, an annular reinforcing rib 34 is formed around the bolt insertion hole 32, and the insertion hole 3 is formed.
2 form a reinforcing rib 35 extending radially.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ボルト
挿通孔３２を有する取付部３１を形成する際には、ロア
ケース３０の成形時において、ボルト挿通孔３２の両側
から溶融樹脂が回り込んで取付部３１が環状に形成され
るため、取付部３１におけるボルト挿通孔３２から外側
部分にウェルド３６が発生し易い。そのため、電気接続
箱を車両に取り付ける際、ボルトにより取付部３１を締
め付けると、ウェルド３６に締め付け力が集中し、ウェ
ルド３６に沿ってクラックや割れが発生し易かった。特
に、エンジンルームのような使用環境が厳しい場所に組
付けられる電気接続箱では、電気接続箱を成形するため
の樹脂にガラス繊維等を添加して材料の強化を行ってい
るが、粘りが少なくなって衝撃に対する耐久性が低下
し、不具合を起こす可能性があった。However, when the mounting portion 31 having the bolt insertion hole 32 is formed, when the lower case 30 is formed, the molten resin flows from both sides of the bolt insertion hole 32 and the mounting portion 31 is formed. Is formed in an annular shape, so that a weld 36 is likely to be generated in a portion outside the bolt insertion hole 32 in the mounting portion 31. Therefore, when the electric connection box is mounted on the vehicle, if the mounting portion 31 is tightened with bolts, the tightening force is concentrated on the weld 36, and cracks and cracks are easily generated along the weld 36. In particular, in electrical junction boxes that are assembled in places where the use environment is severe, such as in an engine room, glass fibers are added to the resin used to mold the electrical junction box to strengthen the material, but the stickiness is low. As a result, the durability against impact is reduced, and there is a possibility of causing a problem.
【０００５】本発明は、このような従来の技術に存在す
る問題点に着目してなされたものであり、その目的は、
ウェルドが発生しても外力が集中せず、ウェルドに沿っ
たクラックや割れ等を発生しにくくすることができる電
気接続箱を提供することにある。[0005] The present invention has been made in view of the problems existing in such prior art.
An object of the present invention is to provide an electric junction box in which external force is not concentrated even when a weld is generated, and cracks, cracks, and the like along the weld are hardly generated.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、請求項１に記載の発明は、合成樹脂により一体成
形され、箱本体の外周部に環状の形成部を備えた電気接
続箱において、前記形成部における貫通孔から箱本体側
の内側部分を肉抜きするとともに、前記貫通孔から外側
部分を肉抜きせずに又は前記内側部分よりも少なく肉抜
きしたことを要旨とする。In order to achieve the above object, the invention according to claim 1 is an electric connection box integrally formed of synthetic resin and having an annular forming portion on the outer periphery of the box body. In the aspect, the inside portion of the box body side is lightened from the through hole in the forming portion, and the outside portion is not lightened from the through hole or lightened less than the inside portion.
【０００７】請求項２に記載の発明は、請求項１に記載
の電気接続箱において、前記環状の形成部は、ボルト挿
通孔を有し、かつ、電気接続箱を被取付体に取り付ける
取付部であることを要旨とする。According to a second aspect of the present invention, in the electrical junction box according to the first aspect, the annular forming portion has a bolt insertion hole and attaches the electrical junction box to an object to be attached. The gist is that
【０００８】[0008]
【発明の実施の形態】以下に、本発明を具体化した一実
施形態を、図１〜図４に基づいて説明する。図１に示す
ように、電気接続箱は合成樹脂により形成され、電装部
品を収容するロアケース１２と同ロアケース１２に嵌合
されるアッパーケース１３とからなる電気接続箱本体１
１を備えている。ロアケース１２の外周部の複数箇所に
は電気接続箱を被取付体としての車両に取り付ける環状
の形成部としての取付部１４，１５が一体に形成されて
いる。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the electric connection box is made of synthetic resin, and has an electric connection box main body 1 including a lower case 12 for accommodating electric components and an upper case 13 fitted to the lower case 12.
1 is provided. At a plurality of locations on the outer peripheral portion of the lower case 12, mounting portions 14 and 15 are integrally formed as annular forming portions for mounting the electric connection box to a vehicle as an attached body.
【０００９】次に、これらの取付部１４，１５について
説明するが、両取付部１４，１５はロアケース１２に対
する形成箇所が異なるのみで同様の構成であるため、取
付部１４について説明し、取付部１５の説明を省略す
る。Next, the mounting portions 14 and 15 will be described. Since the mounting portions 14 and 15 have the same configuration except that they are formed in the lower case 12 only, the mounting portion 14 will be described. The description of No. 15 is omitted.
【００１０】取付部１４の中間部にはボルト挿通孔１６
が形成されている。この取付部１４はボルトの締め付け
力に耐えられるようにロアケース１２の肉厚と比較して
厚肉に形成されている。ところが、取付部１４が厚肉の
ままではロアケース１２の成形後のひけによる取付部１
４の変形が生じる。そのため、図３に示すように、取付
部１４におけるボルト挿通孔１６から箱本体１１側の内
側部分１４Ａを肉抜きして薄肉部１７を形成するととも
に、ボルト挿通孔１６から外側部分１４Ｂを肉抜きせず
に厚肉としている。A bolt insertion hole 16 is provided at an intermediate portion of the mounting portion 14.
Are formed. The mounting portion 14 is formed thicker than the lower case 12 so as to withstand the tightening force of the bolt. However, if the mounting portion 14 remains thick, the mounting portion 1 due to sink after molding of the lower case 12 is formed.
4 occurs. Therefore, as shown in FIG. 3, the inside portion 14 </ b> A on the box body 11 side is lightened from the bolt insertion hole 16 in the attachment portion 14 to form a thin portion 17, and the outer portion 14 </ b> B is lightened from the bolt insertion hole 16. It is thick without doing.
【００１１】また、取付部１４にはボルト挿通孔１６の
周囲に環状の補強リブ１８が形成されるとともに、内側
部分１４Ａには補強リブ１８から放射状に延びる補強リ
ブ１９が形成されている。補強リブ１８の厚さは補強リ
ブ１９の厚さよりも大きく設定されている。In addition, an annular reinforcing rib 18 is formed around the bolt insertion hole 16 in the mounting portion 14, and a reinforcing rib 19 extending radially from the reinforcing rib 18 is formed in the inner portion 14A. The thickness of the reinforcing rib 18 is set to be larger than the thickness of the reinforcing rib 19.
【００１２】このように構成された本実施形態の電気接
続箱からは以下の効果を期待することができる。 ・ 本実施形態の電気接続箱においても、ボルト挿通孔
１６を有する取付部１４を形成する際には、ロアケース
１２の成形時において、ボルト挿通孔１６の両側から溶
融樹脂が回り込んで取付部１４が環状に形成される。従
って、取付部１４におけるボルト挿通孔１６から外側部
分１４Ｂにウェルド２０が発生し易い。ところが、本実
施形態においては取付部１４におけるボルト挿通孔１６
から箱本体１１側の内側部分１４Ａを肉抜きして薄肉部
１７を形成し、ボルト挿通孔１６から外側部分１４Ｂを
肉抜きせずに厚肉としている。そのため、ボルトにより
取付部３１を締め付けて電気接続箱を車両に取り付ける
際、取付部１４の外側部分１４Ｂにウェルド２０が発生
していても、厚肉の外側部分１４Ｂによってウェルド２
０に締め付け力が集中せず、ウェルド２０に沿ったクラ
ックや割れ等を発生しにくくすることができ、電気接続
箱の信頼性を向上することができる。The following effects can be expected from the electric junction box of the present embodiment configured as described above. Also in the electrical junction box of the present embodiment, when forming the mounting portion 14 having the bolt insertion hole 16, when the lower case 12 is formed, the molten resin flows around from both sides of the bolt insertion hole 16 and the mounting portion 14 is formed. Are formed in an annular shape. Therefore, the weld 20 is likely to be generated from the bolt insertion hole 16 in the mounting portion 14 to the outer portion 14B. However, in the present embodiment, the bolt insertion holes 16
The inside portion 14A on the box body 11 side is lightened from the thinner portion 17 to form a thin portion 17, and the outer portion 14B from the bolt insertion hole 16 is thickened without being lightened. Therefore, when the electric connection box is mounted on the vehicle by tightening the mounting portion 31 with the bolt, even if the weld 20 is generated on the outer portion 14B of the mounting portion 14, the weld 2 is formed by the thick outer portion 14B.
The tightening force is not concentrated to zero, cracks and cracks along the weld 20 can be hardly generated, and the reliability of the electric junction box can be improved.
【００１３】ちなみに、本実施形態において、合成樹脂
材料としてガラス繊維を１０パーセント添加したポリプ
ロピレン樹脂を用いて電気接続箱を成形する際、取付部
１４，１５の薄肉部１７の最低の肉厚６ｍｍとした場合
に、取付部１４，１５は１０Ｎ・ｍの締め付けトルクに
耐えることができ、エンジンルームのような使用環境が
厳しい場所に組付けられる電気接続箱に適用することが
できる。By the way, in this embodiment, when forming the electrical junction box using a polypropylene resin to which glass fiber is added by 10% as a synthetic resin material, the minimum thickness of the thin portions 17 of the mounting portions 14 and 15 is 6 mm. In this case, the mounting portions 14 and 15 can withstand a tightening torque of 10 N · m, and can be applied to an electric junction box mounted in a place where the use environment is severe such as an engine room.
【００１４】・ 本実施形態においては、取付部１４，
１５にはボルト挿通孔１６の周囲に環状の補強リブ１８
を形成したので、大きなボルト締め付け力に耐えること
ができる。In the present embodiment, the mounting portions 14,
An annular reinforcing rib 18 is provided around the bolt insertion hole 16.
Formed, can withstand a large bolt tightening force.
【００１５】・ 本実施形態においては、取付部１４
（１５）の内側部分１４Ａには補強リブ１８から放射状
に延びる補強リブ１９を形成したので、取付部１４（１
５）の強度を向上することができる。In the present embodiment, the mounting portion 14
Since the reinforcing rib 19 extending radially from the reinforcing rib 18 is formed on the inner portion 14A of (15), the mounting portion 14 (1
5) Strength can be improved.
【００１６】なお、前記実施形態は、次のように変更し
て具体化することも可能である。 ・ 前記実施形態では取付部１４のボルト挿通孔１６の
外側部分１４Ｂを肉抜きせずに厚肉としたが、この外側
部分１４Ｂを取付部１４の内側部分１４Ａよりも少なく
肉抜きして実施してもよい。The above embodiment can be embodied with the following modifications. In the above embodiment, the outer portion 14B of the bolt insertion hole 16 of the mounting portion 14 is thickened without lightening, but the outer portion 14B is lightened less than the inner portion 14A of the mounting portion 14. You may.
【００１７】次に、上記各実施形態から把握できる他の
技術的思想について記載する。 （イ） 請求項２に記載の電気接続箱において、前記肉
抜きした部分には補強リブが設けられている電気接続
箱。Next, other technical ideas that can be grasped from the above embodiments will be described. (A) The electrical junction box according to claim 2, wherein the lightened portion is provided with a reinforcing rib.
【００１８】（ロ） 上記（イ）に記載の電気接続箱に
おいて、前記補強リブは前記ボルト挿通孔の周囲にも設
けられている電気接続箱。(B) The electric connection box according to (a), wherein the reinforcing ribs are also provided around the bolt insertion holes.
【００１９】[0019]
【発明の効果】請求項１又は２に記載の発明によれば、
ウェルドが発生しても外力が集中せず、ウェルドに沿っ
たクラックや割れ等を発生しにくくすることができ、電
気接続箱の信頼性を向上することができる。According to the invention described in claim 1 or 2,
Even if a weld is generated, external force is not concentrated, cracks and cracks along the weld can be made less likely to occur, and the reliability of the electrical junction box can be improved.
【図１】一実施形態の電気接続箱を示す斜視図。FIG. 1 is an exemplary perspective view showing an electric connection box according to an embodiment;
【図２】取付部の平面図。FIG. 2 is a plan view of a mounting portion.
【図３】取付部の底面図。FIG. 3 is a bottom view of a mounting portion.
【図４】図３のＡ−Ａ線断面図。FIG. 4 is a sectional view taken along line AA of FIG. 3;
【図５】従来の電気接続箱における取付部の平面図。FIG. 5 is a plan view of a mounting portion in a conventional electric junction box.
【図６】同じく取付部の底面図。FIG. 6 is a bottom view of the mounting portion.
【図７】図６のＢ−Ｂ線断面図。FIG. 7 is a sectional view taken along line BB of FIG. 6;
１１…箱本体、１４，１５…形成部としての取付部、１
４Ａ…内側部分、１４Ｂ…外側部分、１６…貫通孔とし
てのボルト挿通孔。11 ... box body, 14, 15 ... mounting part as forming part, 1
4A: Inside portion, 14B: Outside portion, 16: Bolt insertion holes as through holes.
Claims (2)
外周部に環状の形成部を備えた電気接続箱において、 前記形成部における貫通孔から箱本体側の内側部分を肉
抜きするとともに、前記貫通孔から外側部分を肉抜きせ
ずに又は前記内側部分よりも少なく肉抜きした電気接続
箱。1. An electric connection box integrally formed of a synthetic resin and provided with an annular forming portion on an outer peripheral portion of a box main body, wherein an inside portion of the box main body side is lightened from a through hole in the forming portion. An electric junction box in which an outer portion is not cut out from a through hole or is cut out less than the inner portion.
接続箱を被取付体に取り付ける取付部である電気接続
箱。2. The electric connection box according to claim 1, wherein the annular forming portion has a bolt insertion hole and is a mounting portion for mounting the electric connection box to a body to be mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36091398A JP3697920B2 (en) | 1998-12-18 | 1998-12-18 | Electrical junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36091398A JP3697920B2 (en) | 1998-12-18 | 1998-12-18 | Electrical junction box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000183551A true JP2000183551A (en) | 2000-06-30 |
| JP3697920B2 JP3697920B2 (en) | 2005-09-21 |
Family
ID=18471434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36091398A Expired - Fee Related JP3697920B2 (en) | 1998-12-18 | 1998-12-18 | Electrical junction box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3697920B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005119331A (en) * | 2003-10-14 | 2005-05-12 | Yazaki Corp | Electric junction box |
| US6927337B2 (en) | 2001-02-21 | 2005-08-09 | Denso Corporation | Electronic control unit for use in automotive vehicle |
| JP2013026531A (en) * | 2011-07-25 | 2013-02-04 | Alps Electric Co Ltd | Case for electronic component and sensor device using the same |
| JPWO2014098066A1 (en) * | 2012-12-18 | 2017-01-12 | 東レ株式会社 | Fastening structure |
| WO2019102847A1 (en) * | 2017-11-24 | 2019-05-31 | 株式会社オートネットワーク技術研究所 | Circuit configured body |
| JP2021044484A (en) * | 2019-09-13 | 2021-03-18 | Tdk株式会社 | Housing and fitting structure |
-
1998
- 1998-12-18 JP JP36091398A patent/JP3697920B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6927337B2 (en) | 2001-02-21 | 2005-08-09 | Denso Corporation | Electronic control unit for use in automotive vehicle |
| JP2005119331A (en) * | 2003-10-14 | 2005-05-12 | Yazaki Corp | Electric junction box |
| JP2013026531A (en) * | 2011-07-25 | 2013-02-04 | Alps Electric Co Ltd | Case for electronic component and sensor device using the same |
| JPWO2014098066A1 (en) * | 2012-12-18 | 2017-01-12 | 東レ株式会社 | Fastening structure |
| WO2019102847A1 (en) * | 2017-11-24 | 2019-05-31 | 株式会社オートネットワーク技術研究所 | Circuit configured body |
| JP2021044484A (en) * | 2019-09-13 | 2021-03-18 | Tdk株式会社 | Housing and fitting structure |
| JP7367417B2 (en) | 2019-09-13 | 2023-10-24 | Tdk株式会社 | Housing and mounting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3697920B2 (en) | 2005-09-21 |
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