JP2013160358A - Connection stopper and rotation structure of insertion shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper and rotation structure, for allowing a shaft to be inserted easily into a hole, allowing the inserted shaft to be rotated freely, and enduring a pull-out force.SOLUTION: A stopper and rotation structure includes: a blind hole member 1; an insertion shaft 3 to be inserted into an inner diameter hole part 10; and a connection stopper member 2 capable of connecting them and rotating the insertion shaft 3. In the stopper and rotation structure for the insertion shaft into the blind hole, the connection stopper member 2 including an expansion/contraction part is pressed into the inner diameter hole part 10 of the blind hole member 1, to insert, stop and rotate the shaft by an annular groove part 7 of the insertion shaft 3 and a tapered shape 8 of a distal end.

Description

本発明は、メクラ孔へ挿入する軸の抜け止めと、回転を両立させる事を図った連結構造に関する。 The present invention relates to a connecting structure that aims to achieve both rotation prevention and rotation prevention of a shaft to be inserted into a mecha hole.

従来、メクラ孔へ軸の挿入連結で、軸の回転と抜け止めを両立させるには、その解決策として、軸抜け止め構造とその構造を備えた圧入装置（例えば、特許文献1参照）、軸の抜け止め装置（例えば、特許文献2参照）等々が提案されている。   Conventionally, in order to achieve both rotation and retaining of the shaft by inserting and connecting the shaft to the shaft hole, as a solution, a shaft retaining structure and a press-fitting device having the structure (see, for example, Patent Document 1), shaft For example, a retaining device (see, for example, Patent Document 2) has been proposed.

特開2003-220525号公報Japanese Patent Laid-Open No. 2003-220525 特開平10-287214号公報JP-A-10-287214

上述の如く従来の軸の連結抜け止め及び回転構造においては、メクラ孔部を有する部材に横孔を穿設したり、部材側面に側孔を設けるなど、軸の溝に係合するピン等を固定する為、孔部を有する部材側面に精度の高い加工をする必要が有り、加工コストが高くなる等、多くの点に問題があった。   As described above, in the conventional shaft connecting retaining and rotating structure, a pin or the like that engages with the shaft groove, such as a side hole formed in the member having the hole portion or a side hole formed on the side surface of the member, is provided. In order to fix, there is a problem in many respects, such as it is necessary to perform highly accurate processing on the side surface of the member having the hole, and the processing cost increases.

本発明は、このようなコストアップになるメクラ孔部材の側面よりの加工を無くし、メクラ孔部に連結抜け止め部材を圧入して、この連結抜け止め部材を介して軸を挿入するのみで、挿入軸の連結と抜け止めと回転を、容易に可能とする事を提供することを目的としている。   The present invention eliminates the processing from the side surface of the Mekura hole member that increases the cost, presses the connecting retaining member into the Mekura hole portion, and only inserts the shaft through the connecting retaining member. It is an object to provide that the insertion shaft can be easily connected, retained, and rotated.

上記課題を解決するために、本発明のメクラ孔への挿入軸の連結抜け止め及び回転構造は、軸と前記軸が挿入されるメクラ孔を有する部材と、これらを回転可能に連結する連結抜け止め部材とを備え、前記連結抜け止め部材はメクラ孔内に圧入されて固定される固定部と、この固定部に一体的に設けられた係合バネ部を有し、前記係合バネ部は前記軸の挿入先端部に設けられたテーパ状頭部に押されて広がり、このテーパ状の頭部を通過させるように形成されていて、頭部が通過すると弾性的に縮まって、前記軸頭部の後側環状面と回転可能に抜け止め係合することを特徴とした、挿入軸の連結抜け止め及び回転構造である。
本発明の構造では、前記軸が挿入される前記メクラ孔部材の加工は前記軸が挿入される孔加工のみでよく、この孔の中に前記連結抜け止め部材を圧入し、その後前記軸を挿入することでこれらを回転可能に連結して前記軸の抜け止めを可能に出来る事を特徴としている。 In order to solve the above-mentioned problems, the connecting shaft retaining and rotating structure of the insertion shaft to the mecha hole of the present invention includes a shaft and a member having a mecha hole into which the shaft is inserted, and a connecting hole for rotatably connecting these members. A locking member, and the connecting retaining member has a fixing portion that is press-fitted into a mechula hole and is fixed, and an engagement spring portion that is provided integrally with the fixing portion. The shaft head is pushed and spreads by a tapered head provided at the insertion tip of the shaft, and is formed so as to pass through the tapered head. This is a connection retaining and rotating structure of the insertion shaft, characterized in that it is rotatably engaged with the rear annular surface of the portion.
In the structure of the present invention, the machining of the mecha hole member into which the shaft is inserted may be only the hole processing into which the shaft is inserted, and the connecting retaining member is press-fitted into the hole, and then the shaft is inserted. By doing so, it is possible to prevent these shafts from being detached by rotatably connecting them.

本発明のメクラ孔への挿入軸の連結抜け止め及び回転構造は、メクラ孔部材の横孔加工
をする事が無い為、メクラ孔部材の外形が丸形状の物でも、連結抜け止め部材を孔に圧入するだけで容易に軸とメクラ孔部材を連結する事が出来る。従来のメクラ孔部材に横孔を開けてピンを圧入する構造の場合、外形の丸形状の頂点より芯をずらして開けなければならず、横穴加工をする際、穴を垂直に開ける事が困難である、本発明はこの難点も解決できる。 Since the connecting shaft retaining and rotating structure of the insertion shaft to the mecha hole of the present invention does not perform the horizontal hole processing of the mekra hole member, the connecting retaining member is provided with a hole even if the outer shape of the mekura hole member is round. The shaft and mecha hole member can be easily connected by simply press-fitting into the shaft. In the case of a structure in which a horizontal hole is drilled in a conventional Mekura hole member and the pin is press-fitted, the core must be shifted from the top of the round shape of the outer shape, making it difficult to drill a hole vertically when processing a horizontal hole The present invention can also solve this difficulty.

さらに、メクラ孔端部が完全に密封形状の形状であれば、孔部にグリス等潤滑材を封入出来、軸の回転による孔と軸の焼付き等を防止する事が容易に可能となる。 Furthermore, if the end portion of the hole is completely sealed, a lubricant such as grease can be enclosed in the hole, and it becomes easy to prevent seizure of the hole and shaft due to rotation of the shaft.

は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材が環状体を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing an annular body as a connection retaining member, which is an example of an embodiment of the connection retaining and rotating structure of the insertion shaft to the mecha hole according to the present invention. は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材が環状体を示し、挿入軸の挿入過程を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing an insertion process of an insertion shaft, showing an example of an embodiment of a connection retaining and rotating structure of an insertion shaft to a mecha hole according to the present invention, in which the connection retaining member shows an annular body. は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材が線状体を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing an example of an embodiment of a connection retaining and rotating structure of an insertion shaft to a mecha hole according to the present invention, wherein the connection retaining member is a linear body. は図３で示した線状体の連結抜け止め部材の係合バネ部が、軸の溝部に入り縮径し、連結した状態を示す横断面図である。FIG. 4 is a transverse cross-sectional view showing a state in which an engagement spring portion of the connecting member of the linear body shown in FIG. は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材が線状体を示し、挿入軸の挿入過程を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing an insertion process of an insertion shaft, showing an example of an embodiment of a connection retaining and rotating structure of an insertion shaft to a mecha hole according to the present invention, wherein the connection retaining member shows a linear body. は図５で示した線状体の連結抜け止め部材の係合バネ部が、軸先端のテーパ状頭部で広げられた状態を示す横断面図である。FIG. 6 is a transverse cross-sectional view showing a state in which the engagement spring portion of the connecting member of the linear body shown in FIG. 5 is expanded by a tapered head portion at the end of the shaft. は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、連結抜け止め部材が環状体の一例を示す斜視図である。These are the perspective views which show an example of the connection fall-off prevention member of the connection shaft fall-off prevention and rotation structure of the insertion shaft which concerns on this invention, and an annular body. は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、連結抜け止め部材が線状体の一例を示す斜視図である。FIG. 5 is a perspective view showing an example of a linear retaining member of a connecting retaining member of the connecting shaft retaining and rotating structure of an insertion shaft to a mecha hole according to the present invention. は本本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、挿入軸部材のメクラ孔への挿入部分の一例を示す斜視図である。These are the perspective views which show an example of the insertion part to the mechla hole of an insertion shaft member of the connection omission prevention and rotation structure of the insertion shaft to the mechla hole which concerns on this invention.

以下、本発明の実施の一形態を図１〜図９に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

図１は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材2が環状体を示す縦断面図である。
先ず、図1において、図示の外形丸形状になるように所定金属材料等を用いて機械加工などで準備されたメクラ孔部材1の内径孔部10に連結抜け止め部材2が圧入される。この内径孔部は所定の圧入公差となるように内周面が加工されている、この圧入孔はメクラ孔として形成されており、メクラ孔端部12が圧入される連結抜け止め部材2の圧入位置決めとなる。 FIG. 1 is a longitudinal cross-sectional view showing an example of an embodiment of a connection retaining and rotating structure of an insertion shaft to a mecha hole according to the present invention, in which a connection retaining member 2 is an annular body.
First, in FIG. 1, the connecting retaining member 2 is press-fitted into the inner diameter hole portion 10 of the meckle hole member 1 prepared by machining or the like using a predetermined metal material or the like so as to have the illustrated outer round shape. The inner peripheral surface of the inner diameter hole is machined so as to have a predetermined press-fitting tolerance. The press-fitting hole is formed as a mechla hole, and the press-fitting of the connecting retaining member 2 into which the mechla hole end 12 is press-fitted. Positioning.

また、この連結抜け止め部材2は弾性のあるバネ材等で作られ、外径部分に所定の公差
範囲内に加工された外周面を有する圧入部4が形成されている。その外周部と一体成形で内側に曲げ成形されたテーパ状の係合バネ部5にスリット6が形成され、このスリット6が形成される事により、係合バネ部5が弾性を有し、拡縮する構造になっている Further, the connecting retaining member 2 is made of an elastic spring material or the like, and a press-fit portion 4 having an outer peripheral surface processed within a predetermined tolerance range is formed in an outer diameter portion. A slit 6 is formed in a tapered engagement spring portion 5 that is integrally formed with the outer peripheral portion and bent inward. By forming this slit 6, the engagement spring portion 5 has elasticity and is expanded and contracted. It has a structure to

また、メクラ孔部材1に圧入された連結部材2の係合バネ部5に挿入される挿入軸3の先端の側面には溝7を設けその側面先端はテーパ形状8とし、テーパ大径部端に環状面9を設けた。この挿入軸3が挿入されるメクラ孔部材1の内径孔部10との勘合部11には隙間公差をもたせる。   Further, a groove 7 is provided on the side surface of the distal end of the insertion shaft 3 to be inserted into the engagement spring portion 5 of the connecting member 2 press-fitted into the mecha hole member 1, and the distal end of the side surface has a tapered shape 8, and the end of the tapered large diameter portion An annular surface 9 was provided. A clearance tolerance is given to the fitting portion 11 with the inner diameter hole portion 10 of the mecha hole member 1 into which the insertion shaft 3 is inserted.

連結抜け止め部材2を圧入されたメクラ孔部材1に挿入軸3を挿入する事で、軸の先端部テーパ形状8で連結部材2の係合バネ部5を拡径し環状面9が係合バネ部5を通過し溝部7の位置で拡径した係合バネ部5の拡縮部が縮径し環状面9で係合バネ部5の拡縮部の拡径を防止し挿入軸3が抜ける事を防止する、   By inserting the insertion shaft 3 into the mechler hole member 1 into which the coupling retaining member 2 is press-fitted, the diameter of the engagement spring portion 5 of the coupling member 2 is increased by the tapered shape 8 at the tip of the shaft, and the annular surface 9 is engaged. The expansion / contraction part of the engagement spring part 5 that has passed through the spring part 5 and has been expanded at the position of the groove part 7 is reduced in diameter, and the annular surface 9 prevents the expansion / contraction part of the engagement spring part 5 from expanding and the insertion shaft 3 comes out. Prevent,

又、メクラ孔部材1の内径孔部10と挿入軸3の勘合部11との隙間で挿入軸3は自由に回転が可能になる。   In addition, the insertion shaft 3 can freely rotate through the gap between the inner diameter hole portion 10 of the meckle hole member 1 and the fitting portion 11 of the insertion shaft 3.

図2は連結抜け止め部材2が環状体で、挿入軸3が内径孔部10に挿入される過程の図で、軸先端部のテーパ形状8が連結抜け止め部材2の係合バネ部5を広げた状態の縦断面図である。   FIG. 2 is a diagram of a process in which the connecting retaining member 2 is an annular body, and the insertion shaft 3 is inserted into the inner diameter hole portion 10, and the tapered shape 8 of the shaft tip portion defines the engaging spring portion 5 of the connecting retaining member 2. It is a longitudinal cross-sectional view of the state expanded.

図3は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材2が線状体で、バネ線材等で成形された形状を示す縦断面図である。   FIG. 3 is an example of an embodiment of the connection retaining and rotating structure of the insertion shaft to the mecha hole according to the present invention, and the longitudinal section showing the shape formed by the connection retaining member 2 is a linear body and is formed of a spring wire or the like. FIG.

図4は連結抜け止め部材2が線状体で、係合バネ部が軸の溝部に入り縮径し、連結した状態を示す横断面図である。
図5は本発明に係るメクラ孔への挿入軸の連結抜け止め及び回転構造の、実施の一例で、連結抜け止め部材2が線状体で、バネ線材等で成形された形状を示す縦断面図であり、挿入軸3のテーパ形状8で係合バネ部5を広げた状態の図である。 FIG. 4 is a transverse cross-sectional view showing a state in which the connection retaining member 2 is a linear body, and the engagement spring portion enters the groove portion of the shaft and is reduced in diameter and connected.
FIG. 5 is an example of an embodiment of the coupling retaining and rotating structure of the insertion shaft to the mecha hole according to the present invention, and the longitudinal section showing the shape formed by the coupling retaining member 2 is a linear body and a spring wire or the like FIG. 6 is a diagram showing a state where the engagement spring portion 5 is widened by the taper shape 8 of the insertion shaft 3.

図6は図5で示した挿入軸3のテーパ形状8で係合バネ部5を広げた状態の横断面図である。   FIG. 6 is a cross-sectional view of the state in which the engagement spring portion 5 is expanded by the tapered shape 8 of the insertion shaft 3 shown in FIG.

図7は本発明に係るメクラ孔への挿入軸3の連結抜け止め及び回転構造の、連結抜け止め部材2の圧入部4と係合バネ部5とスリット6を示す環状体の斜視図である。   FIG. 7 is a perspective view of an annular body showing the press-fitting portion 4, the engagement spring portion 5 and the slit 6 of the connection retaining member 2 in the connection retaining and rotating structure of the insertion shaft 3 into the mecha hole according to the present invention. .

図8は本発明に係るメクラ孔への挿入軸3の連結抜け止め及び回転構造の、連結部材2の一例で、バネ線材等で成形された形状を示す線状体の斜視図である。   FIG. 8 is a perspective view of a linear body showing an example of a connecting member 2 having a structure for preventing and removing the connecting shaft 3 from being inserted into the shaft hole according to the present invention and a shape formed of a spring wire or the like.

図9は本発明に係るメクラ孔への挿入軸3の連結抜け止め及び回転構造の、挿入軸3の一例で、係合バネ部5を広げる軸先端部のテーパ部8、係合し軸の抜け止めの働きをする環状面9と溝部7を示す斜視図である。   FIG. 9 is an example of the insertion shaft 3 of the connecting shaft 3 to prevent the rotation of the insertion shaft 3 from the shaft hole according to the present invention and the rotation structure. FIG. 5 is a perspective view showing an annular surface 9 and a groove portion 7 that function to prevent a removal.

1 メクラ孔部材 10 内径孔部
2 連結抜け止め部材 11 勘合部
3 挿入軸 12 メクラ孔端部
4 圧入部
5 係合バネ部
6 スリット
7 溝部
8 テーパ形状
9 環状面
1 Mekura hole member 10 Inner diameter hole
2 Connecting retaining member 11 Fitting part
3 Insertion shaft 12
4 Press-in part
5 Engagement spring
6 Slit
7 Groove
8 Taper shape
9 Annular surface

Claims (4)

軸と、前記軸が挿入されるメクラ孔部を有する部材と、これらを回転可能に連結する連結抜け止め部材とを備え、前記連結抜け止め部材はメクラ孔内に圧入されて固定される固定部と、この固定部に一体的に設けられた係合バネ部を有し、前記係合バネ部は前記軸の挿入先端部に設けられたテーパ状頭部に押されて広がり、このテーパ状の頭部を通過させるように形成されていて、頭部が通過すると弾性的に縮まって、前記軸頭部の後側環状面と回転可能に抜け止め係合することを特徴とする挿入軸の連結抜け止め及び回転構造。  A fixed portion that includes a shaft, a member having a shaft hole portion into which the shaft is inserted, and a connection retaining member that rotatably couples the shaft, and the connection retaining member is press-fitted into the mesh hole and fixed. And an engaging spring portion provided integrally with the fixing portion, and the engaging spring portion is pushed and spreads by a tapered head portion provided at the insertion tip portion of the shaft. Insertion shaft connection characterized in that it is formed so as to pass through the head and elastically contracts when the head passes, and engages with the rear annular surface of the shaft head to prevent it from coming off. Retaining and rotating structure. 前記固定部は環状体として形成され、前記連結抜け止め部材の前記係合バネ部は、前記環状体の先端側から後方に向かって内側に傾斜する、ことを特徴として延びている、少なくとも一対の係合片であることを特徴とする請求項1記載の挿入軸の連結抜け止め及び回転構造。  The fixing portion is formed as an annular body, and the engagement spring portion of the connection retaining member is inclined inward from the front end side of the annular body to the inside, and extends, and is at least a pair of 2. The coupling retaining and rotating structure of the insertion shaft according to claim 1, wherein the coupling shaft is an engagement piece. 前記係合片は放射状に設けられていることを特徴とする請求項2記載の挿入軸の連結抜け止め及び回転構造。   3. The connecting shaft retaining and rotating structure of the insertion shaft according to claim 2, wherein the engaging pieces are provided radially. 前記固定部は固定リングであり、前記係合バネ部は前記固定リングに支えられた、一対の半円状線状部材から形成され、前記半円状線状部材のそれぞれは、両端部が線状支持部によって前記固定部に支えられていることを特徴とする請求項1記載の挿入軸の連結抜け止め及び回転構造。

The fixing portion is a fixing ring, and the engaging spring portion is formed of a pair of semicircular linear members supported by the fixing ring, and each of the semicircular linear members has a line at both ends. 2. The connecting shaft retaining and rotating structure of the insertion shaft according to claim 1, wherein the fixed supporting portion supports the fixed portion.

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