JPH0546950Y2 - - Google Patents
Info
- Publication number
- JPH0546950Y2 JPH0546950Y2 JP17536986U JP17536986U JPH0546950Y2 JP H0546950 Y2 JPH0546950 Y2 JP H0546950Y2 JP 17536986 U JP17536986 U JP 17536986U JP 17536986 U JP17536986 U JP 17536986U JP H0546950 Y2 JPH0546950 Y2 JP H0546950Y2
- Authority
- JP
- Japan
- Prior art keywords
- cap
- tail end
- mold
- barrel
- locking step
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Pressure Vessels And Lids Thereof (AREA)
- Clips For Writing Implements (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、筆記具のキヤツプや軸筒の尾端構造
に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the tail end structure of the cap and barrel of a writing instrument.
筆記具のキヤツプや軸筒の尾端には、意匠上や
機能上の理由から、クリツプ付き蓋栓や尾栓など
が固着されることが多い。そしてこのとき、合成
樹脂製のキヤツプや軸筒の尾端から、外周に係止
段が形成された筒部を突設し、クリツプ付き蓋栓
や尾栓などを、その内面に形成された突起がこの
係止段に係合してこの筒部を覆うようにして固着
すれば、組付け作業が簡単であり、一旦係合され
ると確実に固着して脱落することがないなどの利
点を有する。
For aesthetic and functional reasons, a cap with a clip or a tail plug is often fixed to the tail end of the cap or barrel of a writing instrument. At this time, a cylindrical part with a locking step formed on the outer periphery is protruded from the tail end of the synthetic resin cap or shaft cylinder, and a lid plug with a clip or a tail plug is attached to the protrusion formed on the inner surface of the cylindrical part. If it engages with this locking stage and is fixed so as to cover this cylindrical part, the assembly work is easy, and once engaged, it is firmly fixed and will not fall off. have
しかしながら、外周に係止段が形成された筒部
がキヤツプや軸筒の尾端から突設された形状のも
のを合成樹脂にて射出成形するためには、係止段
の部分がアンダーカツトになるため、成形金型
は、入れ子を使用した割型にする必要がある。従
つて、成形金型の構造が複雑で高価なものにな
り、また、型締め力の強い射出成形機が必要とな
るなどの問題点がある。 However, in order to injection mold a cylinder part with a locking step formed on the outer periphery that protrudes from the tail end of a cap or shaft cylinder using synthetic resin, the locking step part must be undercut. Therefore, the mold needs to be a split mold using a nest. Therefore, there are problems in that the structure of the molding die becomes complicated and expensive, and an injection molding machine with a strong mold clamping force is required.
そこで本考案は、外周に係止段が形成された筒
部がキヤツプや軸筒の尾端から突設された形状で
あるにもかかわらず、成形金型を割型にすること
なく合成樹脂にて射出成形することが可能なキヤ
ツプや軸筒の尾端構造を提供することを目的とす
るものである。
Therefore, the present invention was developed to make a synthetic resin without splitting the molding die, even though the cylindrical part with a locking step formed on the outer periphery protrudes from the cap or the tail end of the shaft cylinder. The purpose of this invention is to provide a structure for the tail end of a cap or barrel that can be injection molded.
本考案の構成は、合成樹脂製のキヤツプもしく
は軸筒の尾端開口から突出した筒部１２の先端外
周には係止段１３が形成され、クリツプ付き蓋栓
や尾栓などが、その内面に形成された突起を係止
段１３に係合してキヤツプもしくは軸筒の尾端開
口に固着するキヤツプや軸筒の尾端構造であつ
て、筒部１２は、キヤツプもしくは軸筒の尾端開
口の内側に径方向に形成された複数個のリブ１１
を介して一体に連設されるとともに、係止段１３
には、リブ１１の巾と位相に等しい切欠き１４が
形成され、係止段１３は、筒部１２の外周を郭定
する可動型４からリブ１１の間を通つて伸びる円
弧型４１の先端面にて成形可能であることを特徴
とする。
The structure of the present invention is that a locking step 13 is formed on the outer periphery of the tip of a cylinder portion 12 that protrudes from the tail end opening of a synthetic resin cap or barrel, and a lid plug with a clip or a tail plug is attached to the inner surface of the locking step 13. The structure is a tail end structure of a cap or barrel in which a formed protrusion is engaged with a locking step 13 to secure the cap or barrel to the tail end opening of the cap or barrel. A plurality of ribs 11 formed radially inside the
are integrally connected via the locking step 13.
A notch 14 equal to the width and phase of the rib 11 is formed in the locking step 13, and the locking step 13 is formed at the tip of an arcuate mold 41 extending from the movable mold 4 defining the outer periphery of the cylindrical portion 12 through between the ribs 11. It is characterized by being moldable on the surface.
すなわち、成形金型は、キヤツプや軸筒の外面
を主として郭定する固定型と、この内面を主とし
て郭定する可動型とで構成されるが、係止段１３
にリブ１１の巾と位相に等しい切欠き１４が設け
られているので、この切欠き１４を通つて伸びる
固定型の部分と、リブ１１の間を通つて伸びる可
動型の部分とは交互に組合わさつて筒部１２の外
周面を郭定する型となり、リブ１１の間を通つて
伸びる可動型の先端面にて係止段１３を成形する
ことが出来る。従つて、成形金型を割型にするこ
となく、固定型と可動型のみにて射出成形するこ
とが可能となる。 That is, the molding die is composed of a fixed mold that mainly defines the outer surface of the cap or shaft cylinder, and a movable mold that mainly defines the inner surface of the cap and barrel.
Since the notch 14 is provided with a width equal to the width and phase of the rib 11, the fixed part extending through the notch 14 and the movable part extending between the ribs 11 are assembled alternately. Together, they form a mold that defines the outer circumferential surface of the cylindrical portion 12, and the locking step 13 can be formed at the tip end surface of the movable mold that extends between the ribs 11. Therefore, it is possible to carry out injection molding using only a fixed mold and a movable mold without using a split mold.
以下に図面に示す実施例に基いて本考案を具体
的に説明する。
The present invention will be specifically described below based on embodiments shown in the drawings.
第１図は、キヤツプにクリツプ付き蓋栓を固着
した例を示すが、キヤツプ１は合成樹脂で射出成
形されたものであり、その尾端開口の内側に４本
のリブ１１が径方向に突設されている。そして、
このリブ１１を介して有底の筒部１２が一体に成
形されているが、この筒部１２はペン先を密封す
る内筒の役目を果たし、一部はキヤツプ１の尾端
から突出している。この突出した部分の先端有底
部の外周には鍔状の係止段１３が形成されている
が、第３図に示すように、この係止段１３にはリ
ブ１１と同数の切欠き１４が設けられている。そ
して、この切欠き１４は、その巾がリブ１１の巾
に等しく、かつ位相も等しくなつている。 Figure 1 shows an example in which a cap with a clip is fixed to the cap. The cap 1 is injection molded from synthetic resin, and four ribs 11 protrude in the radial direction inside the tail end opening. It is set up. and,
A bottomed cylindrical portion 12 is integrally molded through this rib 11, and this cylindrical portion 12 serves as an inner cylinder for sealing the pen tip, and a portion protrudes from the tail end of the cap 1. . A flange-like locking step 13 is formed on the outer periphery of the bottomed end of this protruding portion, and as shown in FIG. It is provided. The width of the notch 14 is equal to the width of the rib 11, and the phases thereof are also equal.
しかして、クリツプ付き蓋栓２がこの筒部１２
を覆うようにしてキヤツプ１の尾端に固着される
が、蓋栓２の内面には突起２１が形成されてお
り、蓋栓２を筒部１２に被せて圧入して行くと、
突起２１が係止段１３に係合して確実に固着さ
れ、脱落しないようになる。なお、キヤツプ１の
代りに軸筒の尾端部を上記と同様な構造に成形
し、尾栓を固着するようにしてもよい。 Therefore, the lid plug 2 with a clip is attached to this cylindrical portion 12.
A protrusion 21 is formed on the inner surface of the cap 2, and when the cap 2 is placed over the cylindrical portion 12 and press-fitted,
The protrusion 21 engages with the locking stage 13 and is securely fixed, preventing it from falling off. Incidentally, instead of the cap 1, the tail end of the barrel may be formed into a structure similar to that described above, and a tail plug may be fixed thereto.
次に、かかる構造のキヤツプ１を合成樹脂にて
射出成形するための金型構造を説明する。第４図
に示すように、固定型３と可動型４とで郭定され
るキヤビテイ５内に溶融した合成樹脂が注入され
て成形されるが、第５図と第６図に示すように、
リブ１１用キヤビテイの間を円弧型４１が可動型
４から一体に伸びており、一方、固定型３からは
切欠き１４を形成するための突型３１がリブ１１
の端面まで設けられており、第５図に示すよう
に、円弧型４１と突型３１が交互に組合わさつて
係止段１３とリブ１１の間の筒部１２の外周を郭
定する。なお、円弧型４１と突型３１が交互に組
合わさるのは、切欠き１４の巾がリブ１１の巾に
等しく、かつ位相も等しいためである。従つて、
第４図に示すように、円弧型４１の先端面によつ
て係止段１３用キヤビテイを郭定できる。 Next, a mold structure for injection molding the cap 1 having such a structure using synthetic resin will be explained. As shown in FIG. 4, molten synthetic resin is injected into a cavity 5 defined by a fixed mold 3 and a movable mold 4 and molded.
An arcuate mold 41 extends integrally from the movable mold 4 between the cavities for the ribs 11, while a protruding mold 31 for forming the notches 14 from the fixed mold 3 extends between the cavities for the ribs 11.
As shown in FIG. 5, the arcuate molds 41 and the protruding molds 31 are alternately combined to define the outer periphery of the cylindrical portion 12 between the locking step 13 and the rib 11. The reason why the arcuate molds 41 and the protruding molds 31 are alternately combined is because the width of the notch 14 is equal to the width of the rib 11 and the phases are also equal. Therefore,
As shown in FIG. 4, a cavity for the locking step 13 can be defined by the tip end surface of the arcuate mold 41.
このように、係止段１３の部分がアンダーカツ
トであるにもかかわらず、固定型３と可動型４の
組合せのみによつてキヤツプ１を射出成形するこ
とが出来る。 In this way, although the locking step 13 is an undercut, the cap 1 can be injection molded only by the combination of the fixed mold 3 and the movable mold 4.
以上説明したように、本考案のキヤツプや軸筒
の尾端構造は、合成樹脂製のキヤツプ１もしくは
軸筒の尾端開口の内側に筒部１２が径方向に形成
された複数個のリブ１１を介して一体に連設さ
れ、キヤツプもしくは軸筒の尾端から突出した筒
部１２の先端外周の係止段１３には、リブ１１の
巾と位相に等しい切欠き１４が設けられているの
で、かかる構造のキヤツプ１や軸筒を成形する金
型は、切欠き１４を通つて伸びる突型３１と、リ
ブ１１の間を通つて伸びる円弧型４１とが交互に
組合わさつて筒部１２の外周面を郭定する型とす
ることができ、リブ１１の間を通つて伸びる円弧
型４１の先端面にて係止段１３を成形することが
出来る。従つて、外周に係止段１３が形成された
筒部１２がキヤツプ１や軸筒の尾端から突設され
た形状であるにもかかわらず、成形金型を割型に
することなく、固定型３と可動型４の組合せのみ
によつてキヤツプ１や軸筒を合成樹脂にて射出成
形することが可能となる。
As explained above, the structure of the tail end of the cap or barrel of the present invention includes a plurality of ribs 11 in which a cylindrical portion 12 is formed in the radial direction inside the tail end opening of the synthetic resin cap 1 or barrel. A notch 14 equal to the width and phase of the rib 11 is provided in the locking step 13 on the outer periphery of the tip of the cylindrical portion 12 which is integrally connected via the cap or the tail end of the barrel. The mold for molding the cap 1 and barrel having such a structure has a protruding mold 31 extending through the notch 14 and an arc mold 41 extending between the ribs 11, which are alternately combined to form the cylindrical portion 12. A mold that defines the outer peripheral surface can be used, and the locking step 13 can be formed at the tip end surface of the arcuate mold 41 that extends between the ribs 11. Therefore, even though the cylindrical portion 12 with the locking steps 13 formed on its outer periphery protrudes from the cap 1 and the tail end of the barrel, it can be fixed without splitting the molding die. Only by combining the mold 3 and the movable mold 4, it is possible to injection mold the cap 1 and the barrel from synthetic resin.
第１図は本考案実施例の断面図、第２図は第１
図−線での断面図、第３図は第１図の−
線での断面図、第４図は成形用金型の断面図、第
５図は第４図Ｖ−Ｖ線での断面図、第６図は第４
図−線での断面図、第７図は第４図−線
での断面図である。
１……キヤツプ、１１……リブ、１２……筒
部、１３……係止段、１４……切欠き、２……蓋
栓、３……固定型、３１……突型、４……可動
型、４１……円弧型、５……キヤビテイ。
Fig. 1 is a sectional view of the embodiment of the present invention, and Fig. 2 is a cross-sectional view of the embodiment of the present invention.
Figure 3 is a sectional view taken along the line - Figure 3 is Figure 1 -
4 is a sectional view of the molding die, FIG. 5 is a sectional view taken along line V-V in FIG.
FIG. 7 is a cross-sectional view taken along the line FIG. 4; FIG. 1... Cap, 11... Rib, 12... Cylindrical portion, 13... Locking step, 14... Notch, 2... Lid stopper, 3... Fixed type, 31... Protruding type, 4... Movable type, 41... arc type, 5... cavity.
Claims (1)
から突出した筒部１２の先端外周に係止段１３が
形成され、クリツプ付き蓋栓や尾栓などが、その
内面に形成された突起を係止段１３に係合してキ
ヤツプもしくは軸筒の尾端開口に固着するキヤツ
プや軸筒の尾端構造であつて、 前記筒部１２は、キヤツプもしくは軸筒の尾端
開口の内側に径方向に形成された複数個のリブ１
１を介して一体に連設されるとともに、係止段１
３には、リブ１１の巾と位相に等しい切欠き１４
が形成され、 前記係止段１３は、筒部１２の外周を郭定する
可動型４からリブ１１の間を通つて伸びる円弧型
４１の先端面にて成形可能であることを特徴とす
るキヤツプや軸筒の尾端構造。[Scope of Claim for Utility Model Registration] A locking step 13 is formed on the outer periphery of the tip of the cylindrical portion 12 that protrudes from the tail end opening of the synthetic resin cap or shaft cylinder, and a lid plug with a clip or tail plug, etc. It is a structure at the tail end of a cap or barrel that is fixed to the tail end opening of the cap or barrel by engaging a protrusion formed in the locking stage 13 with the locking stage 13, and the cylindrical portion 12 is attached to the tail end of the cap or barrel. A plurality of ribs 1 formed radially inside the end opening
1, and the locking step 1
3 has a notch 14 equal to the width and phase of the rib 11.
is formed, and the locking step 13 can be formed by the tip surface of an arcuate mold 41 extending from the movable mold 4 defining the outer periphery of the cylindrical portion 12 through between the ribs 11. and the tail end structure of the shaft tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17536986U JPH0546950Y2 (en) | 1986-11-17 | 1986-11-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17536986U JPH0546950Y2 (en) | 1986-11-17 | 1986-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6380177U JPS6380177U (en) | 1988-05-27 |
| JPH0546950Y2 true JPH0546950Y2 (en) | 1993-12-09 |
Family
ID=31114631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17536986U Expired - Lifetime JPH0546950Y2 (en) | 1986-11-17 | 1986-11-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0546950Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211792A (en) * | 1997-01-29 | 1998-08-11 | Mitsubishi Pencil Co Ltd | Cap of writing utensil |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2512102Y2 (en) * | 1991-03-30 | 1996-09-25 | ぺんてる株式会社 | Writing instruments and other caps |
| SG148122A1 (en) | 2007-05-22 | 2008-12-31 | Pilot Ink Co Ltd | Friction body, writing instrument and writing instrument set |
| JP2012179912A (en) * | 2012-04-30 | 2012-09-20 | Pilot Ink Co Ltd | Writing implement |
-
1986
- 1986-11-17 JP JP17536986U patent/JPH0546950Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211792A (en) * | 1997-01-29 | 1998-08-11 | Mitsubishi Pencil Co Ltd | Cap of writing utensil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6380177U (en) | 1988-05-27 |
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