JPH08267983A - Helical engagement structure - Google Patents
Helical engagement structureInfo
- Publication number
- JPH08267983A JPH08267983A JP9779795A JP9779795A JPH08267983A JP H08267983 A JPH08267983 A JP H08267983A JP 9779795 A JP9779795 A JP 9779795A JP 9779795 A JP9779795 A JP 9779795A JP H08267983 A JPH08267983 A JP H08267983A
- Authority
- JP
- Japan
- Prior art keywords
- diameter portion
- large diameter
- small diameter
- tip
- diameter part
- 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.)
- Pending
Links
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内孔に内螺子部を有す
る第１部材と外螺子部を有する第２部材との螺合構造に
関する。更に詳しくは、主に合成樹脂や金属などの材質
による、筆記具の「軸筒とペン先保持部材」、「前軸と
後軸」、「軸筒と尾栓」、「筆記具本体とキャップ」な
どの螺合構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwing structure of a first member having an inner screw portion in an inner hole and a second member having an outer screw portion. More specifically, it is mainly made of materials such as synthetic resin and metal. "Shaft barrel and nib holding member", "Front and rear shafts", "Shaft barrel and tail plug", "Writing tool body and cap" etc. Related to the screwed structure.
【０００２】[0002]
【従来の技術】２部材を接続する手段としての螺合は、
一般に結合の終点位置が確定しにくいので、２部材の結
合位置をバラツキなく確定させるために外螺子部を有す
る部材の外周に形成した突部に内螺子部を有する外部材
の先端を当接させ螺合量を規制し、両部剤の結合位置を
決定するようなしていた。2. Description of the Related Art Screwing as means for connecting two members is
Generally, it is difficult to determine the end point of the connection, so in order to determine the connection position of the two members without variation, the tip of the outer member having the inner screw portion is brought into contact with the protrusion formed on the outer periphery of the member having the outer screw portion. The screwing amount is regulated to determine the connecting position of both parts.
【０００３】従来の螺合構造を示す図４にて説明する
と、第１部材１０１は、内孔１０２に内螺子部１０３を
有しており、先端部１０４を前記第２部材２０１に対す
る当接部としている。第２部材２０１は、外螺子部２０
２を先端小径部２０３に形成しており、この小径部２０
３と大径部２０４との境界部分に形成される段部２０５
を有している。この段部２０５に第１部材１０１の先端
部１０４を当接させるようなしている。Referring to FIG. 4 showing a conventional screwing structure, a first member 101 has an inner screw portion 103 in an inner hole 102, and a tip portion 104 is a contact portion with respect to the second member 201. I am trying. The second member 201 includes the outer screw portion 20.
2 is formed on the tip small diameter portion 203.
3 formed on the boundary between the large diameter portion 204 and the large diameter portion 204
have. The tip portion 104 of the first member 101 is brought into contact with the step portion 205.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、２部材
の螺合をより強固にしようとして上述の螺合の終点以降
も部材を回転させ螺合をきつくした場合、外部材の内螺
子部より先端部にて内部材に当接しているので内螺子部
分は外側にふくらむ力が発生してしまう。内螺子部が外
側にふくらむ方向に力を受けるということは、結局、内
螺子部と外螺子部とが離れることを意味し、強固な結合
を損なうことになってしまうという問題があった。特
に、合成樹脂の射出成形品については、部材が変形しや
すく、加えて、螺子部を成形する際、成形金型より螺子
山を取り外す時に無理抜きするような低い螺子山のもの
では、満足する螺合強度得られないものであった。However, when the two members are rotated even after the end point of the above-mentioned screwing and the screwing is tightened in order to make the screwing of the two members stronger, the tip portion of the outer member rather than the inner screw portion of the outer member. Since it is in contact with the inner member, the inner screw portion generates a force that bulges outward. The fact that the inner screw part receives a force in the direction of bulging outward means that the inner screw part and the outer screw part are separated from each other, and there is a problem in that a strong connection is impaired. In particular, for injection molded products of synthetic resin, the members are easily deformed, and in addition, when the screw part is molded, a screw thread with a low screw thread that is forcibly removed when removing the screw thread from the molding die is satisfactory. The screwing strength could not be obtained.
【０００５】従来の螺合構造を示す図４において、第１
部材１０１と第２部材２０１とを結合する際、第１部材
１０１の先端部１０４が前記第２部材２０１の段部２０
５に当接して結合の終点となすが、より強固な結合関係
を得ようとして更に螺子を回すと、第１部材１０１の先
端部１０４は、第２部材２０１の段部２０５に当接する
ため力を逃がす方向として矢印α方向に変形する力が係
る。すると、螺合部分では第１部材１０１と第２部材２
０１が離れる方向に力が係ることになり、十分に満足の
いく強固な結合が得られないことになるものである。In FIG. 4 showing the conventional screwing structure, the first
When the member 101 and the second member 201 are coupled, the tip portion 104 of the first member 101 has the step portion 20 of the second member 201.
5, the end point of the connection is formed, but when the screw is further turned to obtain a stronger connection, the tip portion 104 of the first member 101 comes into contact with the step portion 205 of the second member 201, so that the force is increased. A force that deforms in the direction of the arrow α is applied as a direction to escape. Then, in the screwed portion, the first member 101 and the second member 2
The force is applied in the direction in which 01 separates, and a sufficiently satisfactory strong bond cannot be obtained.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明は、内孔に
内螺子部を有する第１部材と外螺子部を有する第２部材
との螺合構造において、前記第１部材の内孔には、小径
部と該小径部より先端側で前記内螺子部を有する大径部
とが形成されていると共に、該大径部と小径部との境界
に形成される段部を前記第２部材に対して当接させるこ
とにより両部材の螺合量を規制してなる螺合構造を要旨
とする。That is, according to the present invention, in a screwed structure of a first member having an inner screw portion in an inner hole and a second member having an outer screw portion, the inner hole of the first member is provided. Includes a small-diameter portion and a large-diameter portion having the inner screw portion on the front end side of the small-diameter portion, and the second member includes a step formed at the boundary between the large-diameter portion and the small-diameter portion. The gist is a screwing structure in which the screwing amount of both members is regulated by bringing them into contact with each other.
【０００７】[0007]
【実施例】以下、図面に基づき一例について説明する。
内螺子部を有する第１部材をポリプロピレン製のペン先
ホルダー１、これと結合する第２部材をアクリロニトリ
ルスチレン樹脂製の軸筒２とした２部材における螺合構
造の例として示してある。DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described below with reference to the drawings.
A first member having an inner screw portion is shown as an example of a screw structure in which a polypropylene nib holder 1 and a second member connected to the pen nib holder 1 are an acrylonitrile styrene resin shaft cylinder 2.
【０００８】まず図１にて筆記具Ａ全体について説明す
る。筆記具Ａは内部にボールペンペン先３を先端に有す
るボールペンリフィル４を収納する軸筒２を有し、軸筒
２は、先端にペン先ホルダー１を後端に尾栓５をそれぞ
れ螺着している。First, the entire writing instrument A will be described with reference to FIG. The writing instrument A has a shaft cylinder 2 for accommodating a ballpoint pen refill 4 having a ballpoint pen nib 3 at the tip therein. The shaft cylinder 2 has a pen tip holder 1 at the tip and a tail plug 5 at the rear end, respectively. There is.
【０００９】図１のＩ部拡大図である図２にペン先ホル
ダー１と軸筒２の結合状態を示す。ペン先ホルダー１の
内孔６は、小径部６ａと小径部６ａより先端側の大径部
６ｂが形成されている。この大径部６ｂに内螺子部７を
有している。また、大径部先端部分には凹部８が形成さ
れておりこの部分に射出成形時のゲート口（金型の樹脂
流入口跡）が位置している。ここで、小径部６ａと大径
部６ｂとの境界部分に形成される段部６ｃは軸筒２に対
する当接部となっており、両部剤の螺合量を規制する。FIG. 2, which is an enlarged view of portion I of FIG. 1, shows the state in which the pen tip holder 1 and the barrel 2 are connected. The inner hole 6 of the pen tip holder 1 is formed with a small diameter portion 6a and a large diameter portion 6b on the tip side of the small diameter portion 6a. The large-diameter portion 6b has an inner screw portion 7. Further, a concave portion 8 is formed at the tip portion of the large diameter portion, and the gate port (trace of the resin inflow port of the die) at the time of injection molding is located in this portion. Here, the stepped portion 6c formed at the boundary portion between the small diameter portion 6a and the large diameter portion 6b serves as a contact portion with respect to the shaft tube 2, and regulates the screwing amount of both parts.
【００１０】軸筒２は、外壁９に大径部９ａとこの大径
部９ａより先端側に小径部９ｂを有しており、小径部９
ａと大径部９ｂとの境界部分には段部９ｃが形成されて
いる。小径部９ａには、外螺子部１０が形成されており
前述のペン先ホルダー１の内螺子部７と螺合している。
また、軸筒２の先端部１１は、前述のペン先ホルダー１
の段部６ｃに対する当接部となっている。更に、小径部
９ａの段部９ｃ近傍部に凹部１２が形成されておりこの
部分に射出成形時のゲート口（金型の樹脂流入口跡）が
位置している。The barrel 2 has a large-diameter portion 9a on the outer wall 9 and a small-diameter portion 9b on the tip side of the large-diameter portion 9a.
A step portion 9c is formed at a boundary portion between a and the large diameter portion 9b. An outer screw portion 10 is formed on the small-diameter portion 9a and is screwed with the inner screw portion 7 of the pen tip holder 1 described above.
Further, the tip end portion 11 of the barrel 2 has the above-mentioned pen tip holder 1
Is a contact portion for the stepped portion 6c. Further, a concave portion 12 is formed in the vicinity of the step 9c of the small diameter portion 9a, and a gate port (a resin inflow port mark of the die) at the time of injection molding is located in this portion.
【００１１】ペン先ホルダー１と軸筒２とが螺合した状
態では、ペン先ホルダー１の内螺子部７よりも後部側に
位置する段部６ｃと軸筒２の外螺子部１０よりも先端側
の先端部１１にて当接し螺合量を規制しており、ペン先
ホルダー１の先端部１３と軸筒２の段部９ｃとの間には
微細な空間１４が形成されるようなしてある。よって、
より強固な結合を得ようとして段部６ｃと先端部１１と
が当接した後にも螺合を進めて両部剤を回転させた場
合、内螺子部７と外螺子部１０とが離れる方向には力が
働かない。特に、本例の場合、ペン先ホルダー１は比較
的柔らかい材質で、また、軸筒２は比較的硬い材質にて
成形されているのでペン先ホルダー１の大径部６ｂは、
段部６ｃに引っ張られ、内側に縮径する方向の力が係
り、結果として内螺子部７と外螺子部１０とが圧接する
ことになるので、より強固な結合が得られることにな
る。In the state where the pen tip holder 1 and the barrel 2 are screwed together, the stepped portion 6c located rearward of the inner screw portion 7 of the pen tip holder 1 and the tip of the outer screw portion 10 of the barrel 2 are located. The tip end portion 11 on the side abuts to regulate the screwing amount, and a fine space 14 is formed between the tip end portion 13 of the pen tip holder 1 and the stepped portion 9c of the barrel 2. is there. Therefore,
Even when the stepped portion 6c and the tip portion 11 are in contact with each other in order to obtain a stronger joint, when the both parts are rotated by advancing the screwing, the inner screw portion 7 and the outer screw portion 10 are separated from each other. Does not work. In particular, in the case of this example, since the pen tip holder 1 is made of a relatively soft material and the barrel 2 is made of a relatively hard material, the large diameter portion 6b of the pen tip holder 1 is
A force in the direction in which the stepped portion 6c pulls and reduces the inner diameter is applied, and as a result, the inner screw portion 7 and the outer screw portion 10 are brought into pressure contact with each other, so that a stronger connection is obtained.
【００１２】ここで、ペン先ホルダー１及び軸筒２の射
出成形時のゲート口は、外部から見えない部位に位置さ
せることが美観を保つ上で好ましいばかりか、ペン先を
保護するキャップ（図示せず）などとの嵌合を考慮する
と寸法管理のしにくいゲート口は内部に形成することが
好ましいといえるが、一般に、合成樹脂成形品のゲート
口は、樹脂の歪みが大きい部分であり、無理な力が係る
と成形品自体の破損につながるものである。Here, it is preferable not only to keep the appearance that the gate opening of the pen tip holder 1 and the barrel 2 at the time of injection molding is located at a portion that cannot be seen from the outside, but also a cap for protecting the pen tip (see FIG. Although it can be said that it is preferable to form a gate opening that is difficult to control the dimensions in consideration of fitting with (not shown) etc., in general, the gate opening of a synthetic resin molded product is a portion where resin distortion is large, If excessive force is applied, the molded product itself will be damaged.
【００１３】図４に示す従来技術では、第１部材１０１
の先端部１０４が前記第２部材２０１の段部２０５に当
接するので、結合をより強固になそうとすると、外観上
隠れる部分としてゲート口の形成される外部材の大径部
及び内部材の小径部に多きな力が係ることになり、破損
を招きやすい。これに対して本例のものではゲート口の
形成される部分には力が係らないので、ゲート口より破
損することは極力抑制することができるものである。In the prior art shown in FIG. 4, the first member 101
Since the tip end portion 104 of the outer member abuts the step portion 205 of the second member 201, when trying to strengthen the connection, the large diameter portion of the outer member and the inner member of the outer member in which the gate opening is formed as a portion hidden in appearance are formed. A large amount of force is applied to the small diameter portion, which is likely to cause damage. On the other hand, in this example, since the force is not applied to the portion where the gate opening is formed, damage from the gate opening can be suppressed as much as possible.
【００１４】図３に他の一例を示す。基本的な構造は図
２に示した例と同様であるが、ペン先ホルダー１と軸筒
２との外形上の連結部分に隙間を形成しないようにして
美観の向上や手に把持する際の違和感を解消しようとし
たものである。つまり、図２に示した例では、ペン先ホ
ルダー１の先端部１３と軸筒２の段部９ｃとの間には微
細な空間１４を形成したが、本例では、ペン先ホルダー
１の先端部１３にペン先ホルダー１の外形と面一に薄肉
状の周状鍔部１５を形成し、軸筒２に当接するようなし
たものである。FIG. 3 shows another example. The basic structure is similar to that of the example shown in FIG. 2, but the gap between the pen tip holder 1 and the barrel 2 on the outer shape is not formed to improve the aesthetics and to hold it by hand. It was intended to eliminate discomfort. That is, in the example shown in FIG. 2, the fine space 14 is formed between the tip portion 13 of the pen tip holder 1 and the step portion 9c of the barrel 2, but in this example, the tip end of the pen tip holder 1 is formed. A thin-walled peripheral flange 15 is formed in the portion 13 so as to be flush with the outer shape of the pen tip holder 1, and is brought into contact with the shaft tube 2.
【００１５】この周状鍔部１５は、弾性変形しやすいた
めペン先ホルダー１の大径部６ｂに無理な力が係ること
はない。ここで、周状鍔部１５は軸筒２に形成すること
もできるが、ペン先ホルダー１を比較的柔らかい部材に
て成形することを考慮すると、本図のもののようにペン
先ホルダー１に形成されている方が好ましいといえる。Since the circumferential flange portion 15 is easily elastically deformed, no unreasonable force is applied to the large diameter portion 6b of the pen tip holder 1. Here, although the circumferential flange portion 15 can be formed on the shaft cylinder 2, considering that the pen tip holder 1 is formed by a relatively soft member, it is formed on the pen tip holder 1 as shown in FIG. It can be said that it is preferable that it is done.
【００１６】以上の他にも本願発明の要旨を逸脱しない
限りで種々な競るものである。一例として、上述の例で
は、ペン先ホルダー１の内孔６に形成された段部６ｃと
軸筒２の先端部１１とが当接するよう示したが、先端部
１１は、軸筒２の先端部ではなく外形に形成した段部や
突起であってもよい。また、ペン先ホルダー１や軸筒２
の材質は、合成樹脂の他に金属などであってもよい。更
に、結合する２部材の組み合わせとして、筆記具の例に
て説明したが、これに限定されるものではなく、玩具や
容器、その他の構造物であってもよい。In addition to the above, various competitions can be made without departing from the gist of the present invention. As an example, in the above-described example, the step portion 6c formed in the inner hole 6 of the pen tip holder 1 and the tip portion 11 of the barrel 2 are shown in contact with each other, but the tip portion 11 is the tip of the barrel 2. It may be a stepped portion or a protrusion formed on the outer shape instead of the portion. Also, the pen tip holder 1 and the barrel 2
The material of may be metal or the like other than synthetic resin. Furthermore, although the example of the writing instrument has been described as the combination of the two members to be coupled, the present invention is not limited to this, and may be a toy, a container, or another structure.
【００１７】[0017]
【発明の効果】以上のように、本発明の螺合構造は、内
孔に内螺子部を有する第１部材と外螺子部を有する第２
部材との螺合構造において、前記第１部材の内孔には、
小径部と該小径部より先端側で前記内螺子部を有する大
径部とが形成されていると共に、該大径部と小径部との
境界に形成される段部を前記第２部材に対して当接させ
ることにより両部材の螺合量を規制してなるので、螺合
をきつくした場合にも結合の終点位置は影響を受けにく
く、結合の緩みもなく、強固な結合を容易に得ることが
できるものである。As described above, in the screw structure of the present invention, the first member having the inner screw portion in the inner hole and the second member having the outer screw portion are provided.
In the threaded structure with the member, the inner hole of the first member is
A small-diameter portion and a large-diameter portion having the inner screw portion on the tip side of the small-diameter portion are formed, and a step portion formed at a boundary between the large-diameter portion and the small-diameter portion is provided with respect to the second member. Since the screwing amount of both members is regulated by abutting against each other, the end point position of the connection is not easily affected even when the screwing is tight, and the connection is not loose, and a strong connection can be easily obtained. Is something that can be done.
【図１】実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment.
【図２】図１のものの要部拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図３】他の一例を示す断面図。FIG. 3 is a cross-sectional view showing another example.
【図４】従来技術を示す断面図。FIG. 4 is a sectional view showing a conventional technique.
Ａ 筆記具 １ ペン先ホルダー ２ 軸筒 ３ ペン先 ４ リフィル ５ 尾栓 ６ 内孔 ６ａ 小径部 ６ｂ 大径部 ６ｃ 段部 ７ 内螺子部 ８ 凹部 ９ 外壁 ９ａ 大径部 ９ｂ 小径部 ９ｃ 段部 １０ 外螺子部 １１ 先端部 １２ 凹部 １３ 先端部 １４ 空間 １５ 周状鍔部 １０１ 第１部材 １０２ 内孔 １０３ 内螺子部 １０４ 先端部 ２０１ 第２部材 ２０２ 外螺子部 ２０３ 小径部 ２０４ 大径部 ２０５ 段部 A Writing instrument 1 Pen tip holder 2 Shaft cylinder 3 Pen tip 4 Refill 5 Tail plug 6 Inner hole 6a Small diameter portion 6b Large diameter portion 6c Step portion 7 Inner screw portion 8 Recess 9 Outer wall 9a Large diameter portion 9b Small diameter portion 9c Step portion 10 Outside Screw part 11 Tip part 12 Recessed part 13 Tip part 14 Space 15 Circumferential collar part 101 First member 102 Inner hole 103 Inner screw part 104 Tip part 201 Second member 202 Outer screw part 203 Small diameter part 204 Large diameter part 205 Step part
Claims (1)
子部を有する第２部材との螺合構造において、前記第１
部材の内孔には、小径部と該小径部より先端側で前記内
螺子部を有する大径部とが形成されていると共に、該大
径部と小径部との境界に形成される段部を前記第２部材
に対して当接させることにより両部材の螺合量を規制し
てなる螺合構造。1. A screwing structure of a first member having an inner screw portion in an inner hole and a second member having an outer screw portion, wherein:
In the inner hole of the member, a small diameter portion and a large diameter portion having the inner screw portion on the tip side of the small diameter portion are formed, and a step portion formed at the boundary between the large diameter portion and the small diameter portion. A screwing structure in which the screwing amount of both members is regulated by abutting against the second member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9779795A JPH08267983A (en) | 1995-03-30 | 1995-03-30 | Helical engagement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9779795A JPH08267983A (en) | 1995-03-30 | 1995-03-30 | Helical engagement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08267983A true JPH08267983A (en) | 1996-10-15 |
Family
ID=14201797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9779795A Pending JPH08267983A (en) | 1995-03-30 | 1995-03-30 | Helical engagement structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08267983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010030049A (en) * | 2008-07-25 | 2010-02-12 | Pentel Corp | Shaft tube with grip and method for molding shaft tube |
| JP2011156661A (en) * | 2010-01-29 | 2011-08-18 | Pentel Corp | Barrel connecting structure |
-
1995
- 1995-03-30 JP JP9779795A patent/JPH08267983A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010030049A (en) * | 2008-07-25 | 2010-02-12 | Pentel Corp | Shaft tube with grip and method for molding shaft tube |
| JP2011156661A (en) * | 2010-01-29 | 2011-08-18 | Pentel Corp | Barrel connecting structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6105301A (en) | Reel seat for a fishing rod | |
| JPH08267983A (en) | Helical engagement structure | |
| JP4575557B2 (en) | Writing instrument shaft | |
| JP3893702B2 (en) | Inserting structure for writing instruments | |
| JP2007177558A (en) | Blocking member for anchor fitting | |
| JP4636585B2 (en) | Shaft cylinder with grip | |
| JP4364868B2 (en) | Writing instrument shaft | |
| JP2607469Y2 (en) | Fitting structure of writing implement members | |
| JP4798982B2 (en) | Writing instrument | |
| JP2593672Y2 (en) | Writing implement | |
| JPH0995082A (en) | Tail plug mounting structure for writing instrument | |
| JP5276900B2 (en) | Writing instrument cap | |
| JP2606386Y2 (en) | Cap fitting structure | |
| JPH07299990A (en) | Connecting member | |
| JPH08216583A (en) | Cartridge for writing liquid | |
| JPH0924691A (en) | Bubble set assembling structure for coating applicator | |
| JP3719760B2 (en) | Tail-end knock structure for liquid applicators such as writing utensils and cosmetics | |
| JP2003112497A (en) | Writing implement having elastic grip | |
| JP3148689U (en) | Writing instrument | |
| JP2008137188A (en) | Writing implement | |
| JP4437522B2 (en) | Writing instrument | |
| JP2560384Y2 (en) | Writing implement | |
| JPH05208582A (en) | Component parts for writing utensils | |
| JP2002301895A (en) | Cap for writing instrument or the like | |
| JP2000135888A (en) | Writing utensil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Effective date: 20040127 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Effective date: 20040315 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040615 |