JP5464728B2 - Resin products with press-fit members - Google Patents
Resin products with press-fit members Download PDFInfo
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- JP5464728B2 JP5464728B2 JP2008317305A JP2008317305A JP5464728B2 JP 5464728 B2 JP5464728 B2 JP 5464728B2 JP 2008317305 A JP2008317305 A JP 2008317305A JP 2008317305 A JP2008317305 A JP 2008317305A JP 5464728 B2 JP5464728 B2 JP 5464728B2
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- hole
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- resin product
- fitting member
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
- B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
- B29C66/12822—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments comprising at least three overlap joint-segments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/322—Providing cavities in the joined article to collect the burr
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
- B29C66/612—Making circumferential joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/737—Articles provided with holes, e.g. grids, sieves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
本発明は、貫通穴を有する樹脂製品にその樹脂製品より硬い圧入部材が圧入されて固定される樹脂製品に関するもので、特にそのとき発生するバリのバリ取り不要の樹脂製品と圧入部材、およびこれらを用いた圧入部材付き樹脂製品に関するものである。 The present invention relates to a resin product in which a press-fitting member harder than the resin product is press-fitted and fixed to a resin product having a through hole, and in particular, a resin product and a press-fitting member that do not require deburring of the burrs generated at that time, and these The present invention relates to a resin product with a press-fitting member that uses the above.
図4は貫通穴を有する樹脂製品にその樹脂製品より硬い圧入部材が圧入される従来製品を説明する図で、(a)は圧入部材の斜視図、(b)は樹脂製品の貫通穴の部分の斜視図である。
〈従来の圧入部材〉
図4(a)において、40は従来の圧入部材の1例としてのカラーである。このカラー40は、圧入先端40Fから圧入後端40Bまで、外径40Dが同じの円筒状をしている。圧入部材としては、カラーの他に、四角柱や六角柱をしたナットのような金属製品を挙げることができる。以下では、カラーの例で説明をしていく。
〈従来の樹脂製品〉
図4(b)において、30は従来の樹脂製品にあけられた貫通穴である。この貫通穴30は入口から出口まで内径が同一の中空円筒状(カラーの挿入の場合)や、横断面内形が同じの四角柱や六角柱(ナットの挿入の場合)をしている。
以後、考え方は同じなので中空円筒状のカラーの例で説明するが、ナットの場合にも同じように適用することができる。
樹脂製品の貫通穴30の内壁には全周に亘って軸方向に平行な山30Mが複数個形成してあり、圧入されたカラー40が圧入されて前進するとき、山30Mを押し潰して反力を得て貫通穴30にカラー40がしっかり固定されるようになる。
4A and 4B are diagrams for explaining a conventional product in which a press-fitting member harder than the resin product is press-fitted into a resin product having a through-hole, wherein FIG. 4A is a perspective view of the press-fitting member, and FIG. 4B is a portion of the through-hole of the resin product. FIG.
<Conventional press-fit member>
In FIG. 4A,
<Conventional resin products>
In FIG.4 (b), 30 is a through-hole drilled in the conventional resin product. The through
Hereinafter, since the concept is the same, an example of a hollow cylindrical collar will be described, but the same can be applied to a nut.
A plurality of
図5は図4(a)のカラーを図4(b)の樹脂製品に圧入する前後を同時に示す従来の樹脂製品3の斜視図である。
図5において、401は図の左の圧入される前のカラーで、402は図の右の圧入された後のカラーである。カラー402が圧入されている樹脂製品の下部からバリBが飛散している。
FIG. 5 is a perspective view of a
In FIG. 5, 401 is a color before being press-fitted on the left side of the figure, and 402 is a color after being press-fitted on the right side of the figure. The burrs B are scattered from the lower part of the resin product into which the
〈バリの発生する理由〉
ここで、バリの発生する理由を図6を用いて説明する。
図6はバリの発生する理由を説明する縦断面図で、(a)は圧入前、(b)は圧入途中、(c)は圧入完了の図である。
(a)圧入前:
樹脂製品を造る場合、図6(a)で示すように、貫通穴30内の複数の山30Mで作る内径30Dの方が円筒状カラー40の外径40Dよりも小さくできている。
(b)圧入途中:
したがって、カラー40が貫通穴30に圧入されると、図6(b)で示すように、カラー40の圧入方向先端40Fが貫通穴30の山30Mを押し潰し、その際削り落としながら下へ圧入が進行していく。削り落ちた山の一部はバリBとなって貫通穴30の内部から下方へ落下する。
(c)圧入完了:
カラー40の圧入が完了すると、図6(c)で示すように、カラー40の先端40Fは貫通穴30最下端に達している。そしてこれまで削り落とされた山30MはバリBとなって貫通穴30の内部から下方に落下している。
<Reason for burrs>
Here, the reason for the occurrence of burrs will be described with reference to FIG.
6A and 6B are longitudinal sectional views for explaining the reason for occurrence of burrs. FIG. 6A is a view before press-fitting, FIG. 6B is a state during press-fitting, and FIG.
(A) Before press-fitting:
When manufacturing a resin product, as shown in FIG. 6A, the
(B) During press fitting:
Accordingly, when the
(C) Press-in completion:
When the press-fitting of the
〈バリの引き起こす問題〉
このように、バリが発生したのは、圧入されたカラー40が山30Mを押し潰すとき削り取られた山30Mの一部がバリBとなって落下したからである。
落下したバリBは樹脂製品に付着して、組み付け時や製品使用時にバリBが移動して、接続不良や不純物混入の原因になったり、製品の重要な部分に付着してさまざまなトラブルを起こすことになった。
そこで、従来はこのバリBを除去するため、わざわざバリ除去工程を設け、バキューム吸引等によりバリBを吸引して除去していた。
<Problems caused by Bali>
Thus, the burr | flash generate | occur | produced because a part of the
The fallen burr B adheres to the resin product, and the burr B moves during assembly or product use, causing connection failure or contamination with impurities, or sticking to important parts of the product and causing various troubles. is what happened.
Therefore, conventionally, in order to remove this burr B, a burr removing step is purposely provided and the burr B is sucked and removed by vacuum suction or the like.
〈先行関連技術〉
一方、バリ対策として、バリが発生してもナットを所定の突当底壁に確実に埋め込むことのできるナット収納部付き樹脂成形品が開示されている(特許文献1参照)。
それによると、ナットが嵌(はめ)込まれる樹脂成形品の凹所を次のように形成している。すなわち、その凹所が、ナットの外周の平行面を規制してナットを回り止めする一対の左右側壁と、ナットの前後端面を規制する一対の前後壁と、ナットの外周の一部を突き当てることでナットの嵌込み深さ位置を規制する突当底壁と、突当底壁と対向するナット挿入用開口とを備え、嵌込んだナットに対しボルトを挿入する切欠が前壁に形成され、ナットを嵌込む際にナットの外周の平行面によって押し潰されるリブが左右側壁に設けられている。そのリブの削りカスを溜める空所を突当底壁に設けている。
これにより、リブの削りカスは空所に溜まるので、ナットを所定の突当底壁に確実に埋め込むことができるようになる、と言うものである。
On the other hand, as a countermeasure against burrs, there is disclosed a resin molded product with a nut housing portion that can reliably embed a nut in a predetermined abutting bottom wall even if burrs occur (see Patent Document 1).
According to this, the recess of the resin molded product into which the nut is fitted (fitted) is formed as follows. That is, the recess abuts a pair of left and right side walls that restrict the parallel surface of the outer periphery of the nut to prevent the nut from rotating, a pair of front and rear walls that restrict the front and rear end surfaces of the nut, and a part of the outer periphery of the nut This is provided with a bottom wall that regulates the depth of the nut and a nut insertion opening facing the bottom wall, and a notch for inserting a bolt into the fitted nut is formed in the front wall. Ribs that are crushed by parallel surfaces of the outer periphery of the nut when the nut is fitted are provided on the left and right side walls. A space is provided in the abutting bottom wall to store the shavings of the ribs.
As a result, the scrap scraps of the ribs accumulate in the voids, so that the nut can be reliably embedded in the predetermined abutting bottom wall.
しかしながら、特許文献1記載の発明は「有底の凹所」にナットを嵌合させる場合には効果があるものの、本発明が対象としている「底を有しない貫通穴」の場合には、バリは従来製品と同じく製品の下方へ飛散してしまい、効果がない。
However, although the invention described in
本発明は、上記した課題を解決するもので、圧入部材によって削り取られた樹脂の一部がバリとなって発生しても、そのバリが樹脂製品から外部に飛散しないようにした樹脂製品を提供することにより、バリ除去工程を不要にして、製品のコスト削減に寄与することを目的としている。 The present invention solves the above-described problems, and provides a resin product in which even if a part of the resin scraped off by the press-fitting member is generated as a burr, the burr is not scattered from the resin product to the outside. The purpose of this is to eliminate the burr removal step and contribute to the cost reduction of the product.
上記目的を達成するために、第1の発明はバリ取り不要の圧入部材付き樹脂製品に係り、貫通穴を有する樹脂製品と、前記樹脂製品より硬い材質で造られた圧入部材とを備え、前記圧入部材が前記貫通穴に圧入されて成る圧入部材付き樹脂製品において、前記貫通穴は、山が形成された被圧入領域を前記圧入部材の挿入側に、かつ、山が形成されていない非圧入領域を該被圧入領域に続けて出口部に向けて備え、前記被圧入領域の開口穴よりも前記非圧入領域の開口穴が小さく、かつ、前記被圧入領域と前記非圧入領域の境界は直角な壁で繋がっており、前記被圧入領域の内壁には軸方向に平行に延びる複数の山が形成され、前記圧入部材は、先端側に小径の案内部分と後端側に大径の圧入部分を前記案内部分に続けて備え、前記案内部分は前記山を押し潰すことなく前記非圧入領域の開口穴まで挿入され、前記圧入部分は前記貫通穴に圧入されて前進するとき前記被圧入領域の前記山を押し潰して反力を得ることで前記貫通穴に確実に固定され、前記圧入部分が前記山を押し潰す際に生じて落下したバリは、前記山と山の間の隙間と前記直角な壁と前記案内部分の後端とで形成される空間に堆積することを特徴としている。
第2の発明は前記第1の発明の圧入部材付き樹脂製品において、前記樹脂製品の前記非圧入領域の貫通穴内側の横断面形状と前記圧入部材の前記案内部分の外側の横断面形状とが略同一であることを特徴としている。
In order to achieve the above object, a first invention relates to a resin product with a press-fitting member that does not require deburring, and includes a resin product having a through hole and a press-fitting member made of a material harder than the resin product, In the resin product with a press-fitting member formed by press-fitting a press-fitting member into the through-hole , the through-hole has a press-fitted region in which a crest is formed on the insertion side of the press-fitting member and is not press-fitted without a crest. An area is provided toward the outlet portion following the press-fit area, the opening hole of the non-press-fit area is smaller than the open hole of the press-fit area, and the boundary between the press-fit area and the non-press-fit area is a right angle The inner wall of the press-fitted region is formed with a plurality of peaks extending in parallel in the axial direction, and the press-fitting member has a small-diameter guide portion on the front end side and a large-diameter press-fit portion on the rear end side. Following the guide portion, the guide portion It is inserted up to the opening hole of the non-press-fit area without crushing the recording mountain, and the press-fitting part is pressed into the through-hole to advance and crush the crest of the pressed-in area to obtain a reaction force. The burr that is securely fixed to the through hole and that is dropped when the press-fitted portion crushes the mountain is formed by the gap between the mountain and the mountain, the right-angle wall, and the rear end of the guide portion. It is characterized by being deposited in a space .
According to a second invention, in the resin product with a press-fitting member according to the first invention, a cross-sectional shape inside the through hole of the non-press-fitted region of the resin product and a cross-sectional shape outside the guide portion of the press-fitting member are It is characterized by being substantially identical.
このような構成により、樹脂製品からバリを飛散しないようにでき、したがってバリ除去工程が不要となり、製品のコスト削減に寄与することとなる。 With such a configuration, it is possible to prevent burrs from being scattered from the resin product, and therefore, a burr removing step is not necessary, which contributes to cost reduction of the product.
以下、本発明に係る樹脂製品について図面に基づいて説明する。
〈本発明に係るカラー付き樹脂製品〉
図1は本発明に係るカラーと、このカラーが圧入される本発明に係る樹脂製品とを説明する斜視図で、(a)は本発明に係るカラーで、(イ)は表側、(ロ)は裏側のそれぞれの斜視図である。(b)は樹脂製品の本発明に係る貫通穴の表側斜視図である。
〈本発明に係るカラー〉
図1(a)から判るように、カラー20は樹脂製品1の貫通穴10(図1(b))に形成された山10Mを押し潰すだけの樹脂製品1よりも固い材料、例えば金属でできている。カラー20は形成された山10Mを押し潰すだけの太い外径20Pd(図3)を有する圧入部分20Pと、この圧入部分20Pの先端から圧入方向先端に向かう案内部分20Gとを備えている。案内部分20Gの方は、山を押し潰すだけの大きさを有しない外径20Gd(図3)となっている。
圧入部分20Pにも圧入抵抗を小さくするため軸方向に平行な溝が複数本切られていて、結果的に前記径の山20Mが複数本形成されている。
圧入方向の後端部はさらに大きな直径として、鍔(つば)20Tを形成している。
Hereinafter, the resin product according to the present invention will be described with reference to the drawings.
<Resin product with color according to the present invention>
FIG. 1 is a perspective view for explaining a collar according to the present invention and a resin product according to the present invention into which the collar is press-fitted. FIG. 1A is a collar according to the present invention, FIG. 1A is a front side, and FIG. FIG. 4 is a perspective view of each of the back side. (B) is a front side perspective view of a through hole according to the present invention of a resin product.
<Color according to the present invention>
As can be seen from FIG. 1A, the
A plurality of grooves parallel to the axial direction are also cut in the press-fitted
The rear end of the press-fitting direction has a larger diameter and forms a
〈本発明に係る樹脂製品〉
一方、樹脂製品1の貫通穴10には、内壁に軸方向に平行に延びる複数の山10Mが形成されている被圧入領域10Aと被圧入領域10Aから出口部(図で下方)に向けて山が形成されていない非圧入領域10Nとを備えている。
そして、被圧入領域10Aの開口穴よりも非圧入領域10Nの開口穴が小さくなっている。
さらに、被圧入領域10Aと非圧入領域10Nとの境界は直角な壁10Wで繋がっている
<Resin product according to the present invention>
On the other hand, in the through
And the opening hole of the non-press-fit area |
Further, the boundary between the press-fitted
図2は図1(a)のカラーを図1(b)の樹脂製品に圧入する前後を同時に示す本発明の樹脂製品1の斜視図である。
図2において、201は図の左の圧入される前のカラーで、202は図の右の圧入された後のカラーである。これによると、カラー202が圧入されている樹脂製品の下部からは従来製品で発生したバリB(図5)が飛散していない。
FIG. 2 is a perspective view of the
In FIG. 2, 201 is a color before press-fitting on the left side of the figure, and 202 is a color after press-fitting on the right side of the figure. According to this, the burrs B (FIG. 5) generated in the conventional product are not scattered from the lower part of the resin product into which the
〈バリの飛散しない理由〉
ここで、本発明によりバリが飛散しなくなる理由を図3を用いて説明する。
図3はバリの飛散しない理由を説明する縦断面図で、(a)は圧入前、(b)は圧入途中、(c)は圧入完了の図である。
(a)圧入前:
樹脂製品を造る場合、図3(a)で示すように、貫通穴10の複数の山10Mで作る被圧入領域10Aの内径10Adは、カラー20の圧入部分20Pの外径20Pdよりも小さく、また案内部分20Gの外径20Gdよりも大きくできている。さらに、貫通穴10の非圧入領域10Nの内径10Ndは、カラー20の案内部分20Gの外径20Gdと略同一にできている。
(b)圧入途中:
したがって、カラー20が貫通穴10に圧入されると、図3(b)で示すように、カラー20の案内部分20Gは貫通穴の山10Mを潰すことなく進むが、圧入部分20Pの先端が貫通穴の山10Mに当接すると山10Mを押し潰し、削り落としながら下へ進んでいく。削り落ちた山10Mの一部はバリBとなって直角な壁10Wの上に落下する。しかしながら、非圧入領域10Nの内径10Ndは案内部分20Gの外径20Gdと略同一にできているので樹脂製品1と案内部分20Gとの間にバリBが漏れ落ちるほどの隙間はなく、したがって直角な壁10Wの上に落下したバリがさらに案内部分20Gの横を通って樹脂製品1の下に排出されるようなことはない。
(c)圧入完了:
カラー20の圧入が完了すると、図3(c)で示すように、カラー20の先端の案内部分20Gは貫通穴10の最下端に達している。そしてこれまで削り落とされたバリBは、すべて直角な壁10Wの上に落下し、直角な壁10Wとカラーの案内部分20Gの後端と圧入部分20Dの先端とで形成される空間に押し潰されて堆積される。バリBがさらに案内部分20Gの横を通って樹脂製品1の下に排出されるようなことはない。
<Reason why Bali does not scatter>
Here, the reason why burrs are not scattered by the present invention will be described with reference to FIG.
3A and 3B are longitudinal sectional views for explaining the reason why burrs are not scattered. FIG. 3A is a view before press-fitting, FIG. 3B is a press-fitting process, and FIG.
(A) Before press-fitting:
When making a resin product, as shown in FIG. 3A, the inner diameter 10Ad of the press-fitted
(B) During press fitting:
Therefore, when the
(C) Press-in completion:
When the press-fitting of the
このように、本発明によれば、圧入されたカラー20が山10Mを押し潰してバリが発生しても、落下したバリはすべて直角な壁10Wとカラーの案内部分10Gの後端と圧入部分10Dの先端とで形成される空間に堆積されることとなるので、樹脂製品1の下に排出されるようなことはない。
したがって、組み付け時や製品使用時にバリが移動して、接続不良や不純物混入の原因になったり、製品の重要な部分に付着してさまざまなトラブルを起こすことは本発明によれば一切起きない。
As described above, according to the present invention, even if the press-fitted
Therefore, according to the present invention, the burrs move at the time of assembly or use of the product, causing connection failure or impurity contamination, or causing various troubles by adhering to an important part of the product.
1 本発明に係る樹脂製品
10 貫通穴
10A 被圧入領域
10Ad 被圧入領域の内径
10M 山
10N 非圧入領域の内径
10Nd 非圧入領域
10W 直角な壁
20、201、202 圧入部材(ここでは、カラー)
20G 案内部分
20Gd 案内部分の外径
20P 圧入部分
20Pd 圧入部分の外径
20T 鍔部分
DESCRIPTION OF
20G Guide portion 20Gd Guide portion
Claims (2)
前記貫通穴は、山が形成された被圧入領域を前記圧入部材の挿入側に、かつ、山が形成されていない非圧入領域を該被圧入領域に続けて出口部に向けて備え、
前記被圧入領域の開口穴よりも前記非圧入領域の開口穴が小さく、かつ、前記被圧入領域と前記非圧入領域の境界は直角な壁で繋がっており、
前記被圧入領域の内壁には軸方向に平行に延びる複数の山が形成され、
前記圧入部材は、先端側に小径の案内部分と後端側に大径の圧入部分を前記案内部分に続けて備え、
前記案内部分は前記山を押し潰すことなく前記非圧入領域の開口穴まで挿入され、
前記圧入部分は前記貫通穴に圧入されて前進するとき前記被圧入領域の前記山を押し潰して反力を得ることで前記貫通穴に確実に固定され、
前記圧入部分が前記山を押し潰す際に生じて落下したバリは、前記山と山の間の隙間と前記直角な壁と前記案内部分の後端とで形成される空間に堆積することを特徴とするバリ取り不要の圧入部材付き樹脂製品。」 In a resin product with a press-fitting member comprising a resin product having a through-hole and a press-fitting member made of a material harder than the resin product, the press-fitting member is press-fitted into the through-hole,
The through hole includes a press-fitted region in which a crest is formed on the insertion side of the press-fitting member, and a non-press-fitted region in which no crest is formed toward the outlet part following the press-fitted region,
The opening hole of the non-pressing area is smaller than the opening hole of the pressed area, and the boundary between the pressed area and the non-pressing area is connected by a right-angle wall,
A plurality of peaks extending parallel to the axial direction are formed on the inner wall of the press-fitted region,
The press-fitting member is provided with a small-diameter guide portion on the front end side and a large-diameter press-fit portion on the rear end side following the guide portion,
The guide part is inserted up to the opening hole of the non-press-fit area without crushing the mountain,
The press-fitted portion is securely fixed to the through-hole by obtaining a reaction force by crushing the crest of the press-fitted region when the press-fitted portion is pressed into the through-hole to advance,
The burr that has been dropped when the press-fitted portion crushes the mountain is accumulated in a space formed by the gap between the mountain and the mountain, the right-angle wall, and the rear end of the guide portion. Resin products with press-fitting members that do not require deburring. "
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JP5557676B2 (en) * | 2010-09-29 | 2014-07-23 | 朝日電装株式会社 | Inhibitor switch device |
JP2013044341A (en) * | 2011-08-22 | 2013-03-04 | Yazaki Corp | Metal member and resin product with the same |
JP5905373B2 (en) * | 2012-10-16 | 2016-04-20 | カルソニックカンセイ株式会社 | Fastening structure |
JP2017087555A (en) * | 2015-11-10 | 2017-05-25 | タイガースポリマー株式会社 | Synthetic resin molded body and manufacturing method therefor |
US20230340977A1 (en) | 2020-03-30 | 2023-10-26 | Hitachi Astemo, Ltd. | Support structure |
JP7055855B1 (en) | 2020-10-30 | 2022-04-18 | ヤマハ発動機株式会社 | Resin parts with mounting holes, assembly parts with them and saddle-mounted vehicles |
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