JPH058156Y2 - - Google Patents
Info
- Publication number
- JPH058156Y2 JPH058156Y2 JP1987037940U JP3794087U JPH058156Y2 JP H058156 Y2 JPH058156 Y2 JP H058156Y2 JP 1987037940 U JP1987037940 U JP 1987037940U JP 3794087 U JP3794087 U JP 3794087U JP H058156 Y2 JPH058156 Y2 JP H058156Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- cap
- writing instrument
- shoulder
- mold
- 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
- 238000009423 ventilation Methods 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Clips For Writing Implements (AREA)
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
- Pens And Brushes (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、筆記具用のキヤツプに関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cap for a writing instrument.
万年筆のように、水性インキを使用する筆記具
では、キヤツプを筆記具本体に装着したときに、
インキの蒸発を防止し、かつキヤツプが係合する
ために、キヤツプ本体内に合成樹脂製の内筒を配
設し、この内筒でペン体を密封するとともに、内
筒の合口側を筆記具本体に係合させるものが多
い。しかし、この内筒の内容積が大きいときは、
筆記に際して、筆記具本体をキヤツプから抜く
と、その瞬間は内筒が筆記具本体に密着している
ので、密封空間の容積が増大し、ペン体の周囲が
減圧される。従つて、インキが過大に吸い出さ
れ、手などを汚したり、筆記中にボタ落ちするな
どの不具合がある。このために、内筒の奥底側に
ペン体を密封する内容積の小さな気密部を設ける
とともに、合口側に筆記具本体の環状突起に係合
する係止部を形成し、気密部と係止部との間に通
気孔を穿設することが行われる。しかしながら、
この内筒は合成樹脂で射出成形されるが、この通
気孔を穿設するには、射出成形後に二次加工が必
要である。従つて、製造工程が増加し、生産性が
低い問題点がある。
For writing instruments that use water-based ink, such as fountain pens, when the cap is attached to the writing instrument itself,
In order to prevent ink evaporation and to engage the cap, an inner cylinder made of synthetic resin is placed inside the cap body, and the pen body is sealed with this inner cylinder, and the abutment side of the inner cylinder is connected to the writing instrument body. There are many things that are engaged with. However, when the internal volume of this inner cylinder is large,
When writing, when the writing instrument body is removed from the cap, the inner cylinder is in close contact with the writing instrument body at that moment, so the volume of the sealed space increases and the pressure around the pen body is reduced. Therefore, there are problems such as an excessive amount of ink being sucked out, staining hands, etc., and smudging while writing. For this purpose, an airtight part with a small inner volume is provided at the bottom side of the inner cylinder to seal the pen body, and a locking part that engages with the annular protrusion of the writing instrument body is formed at the apex side, and the airtight part and the locking part A ventilation hole is bored between the two. however,
This inner cylinder is injection molded from synthetic resin, but in order to create the ventilation holes, secondary processing is required after injection molding. Therefore, there is a problem that the number of manufacturing steps is increased and productivity is low.
そこで本考案は、簡単に製造できて生産性の高
く、筆記具本体をキヤツプから抜くときにインキ
が過大に吸い出されことのない筆記具用キヤツプ
を提供することを目的とする。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cap for a writing instrument that is easy to manufacture, has high productivity, and prevents ink from being sucked out excessively when the main body of the writing instrument is removed from the cap.
本考案の構成は、奥底側にペン体を密封する気
密部を有するとともに、合口側に筆記具本体の環
状突起に係合する係止部が形成され、合成樹脂で
射出成形された内筒がキヤツプ本体内に配設さた
筆記具用キヤツプにおいて、この内筒の外周に肩
部が形成され、この肩部は該肩部から該係止部に
かけての内筒の肉厚と同等かやや大きく、この肩
部から該係止部の方向に伸びる通気用のスリツト
が設けられたことを特徴とするものである。
The structure of the present invention has an airtight part that seals the pen body on the back side, a locking part that engages with the annular protrusion of the writing instrument body on the abutment side, and an inner cylinder injection-molded from synthetic resin as a cap. In a writing instrument cap disposed inside the main body, a shoulder is formed on the outer periphery of this inner cylinder, and this shoulder is equal to or slightly larger than the wall thickness of the inner cylinder from the shoulder to the locking part. It is characterized by a ventilation slit extending from the shoulder toward the locking portion.
すなわち、内筒を成形する金型は、内筒の内周
面を成形する固定型と外周面を成形する可動型で
構成される。そして、通気用のスリツトが内筒の
肩部から係止部の方向に形成されているが、これ
は金型の抜き型の方向に一致する。このため、こ
のスリツトを成形するための型を可動型に設け、
型締めしたときに、このスリツト成形型が固定型
に接触するようにしておけば、通気用のスリツト
も射出成形時に形成できる。従つて、射出成形後
の二次加工が不要になり、工程が簡単になつて生
産性が向上する。 That is, the mold for molding the inner cylinder is composed of a fixed mold for molding the inner peripheral surface of the inner cylinder and a movable mold for molding the outer peripheral surface. A ventilation slit is formed in the direction from the shoulder of the inner cylinder to the locking part, which coincides with the direction of the cutting die of the mold. For this reason, a mold for forming this slit is provided in a movable mold,
If the slit mold is brought into contact with the stationary mold when the mold is clamped, slits for ventilation can also be formed during injection molding. Therefore, secondary processing after injection molding becomes unnecessary, simplifying the process and improving productivity.
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図において、キヤツプ本体１はパイプ状で
あり、尾端開口にはクリツプ２が挿入される切欠
きが形成されているのみである。クリツプ２のＣ
字状固定部が蓋栓３に嵌め込まれているが、この
蓋栓３には、キヤツプ本体１の内径より幾分大き
な圧入部３１と、その前方に小径部３２が設けら
れており、圧入部３１がキヤツプ本体１の尾端開
口に圧入されてしつかりと固着されている。この
小径部３２に合成樹脂で射出成形された内筒４が
嵌着されている。内筒４の内部には、内面がテー
パー状の環状突出部４１が形成されており、これ
より奥底側の空間が気密部４２であるが、この環
状突出部４１が筆記具本体の先口に密着してペン
体を密封する。そして、内筒４の合口側には筆記
具本体の環状突起に係合する係止爪４３が突出し
ている。もつとも、係止爪４３の代りに環状凹部
を形成し、この環状凹部に筆記具本体の環状突起
がはまり込むようにしてもよい。内筒４の外周の
ほゞ中間には、内筒４の肉厚と同等かやゝ大きい
肩部４４が形成されて外径が大きくなつている。
そして、この肩部４４から係止爪４３の向かつて
軸線方向のスリツト４５が形成されており、内筒
４の内部がこのスリツト４５を通して外部に連通
している。 In FIG. 1, a cap body 1 is pipe-shaped, and only a notch into which a clip 2 is inserted is formed at the tail end opening. Clip 2 C
The letter-shaped fixing part is fitted into the lid plug 3, and the lid plug 3 is provided with a press-fit part 31 that is somewhat larger than the inner diameter of the cap body 1, and a small-diameter part 32 in front of the press-fit part 31. 31 is press-fitted into the tail end opening of the cap body 1 and firmly fixed. An inner cylinder 4 injection molded from synthetic resin is fitted into this small diameter portion 32. An annular protrusion 41 with a tapered inner surface is formed inside the inner cylinder 4, and a space deeper than this is an airtight part 42, and this annular protrusion 41 is in close contact with the tip of the writing instrument body. to seal the pen body. A locking pawl 43 protrudes from the abutment side of the inner cylinder 4 and engages with an annular projection of the writing instrument main body. However, an annular recess may be formed in place of the locking pawl 43, and the annular protrusion of the writing instrument body may fit into this annular recess. A shoulder portion 44, which is equal to or slightly larger than the wall thickness of the inner cylinder 4, is formed approximately in the middle of the outer periphery of the inner cylinder 4, so that the outer diameter thereof is increased.
An axial slit 45 is formed from this shoulder portion 44 toward the locking pawl 43, and the inside of the inner cylinder 4 communicates with the outside through this slit 45.
しかして、筆記具本体にこのキヤツプを装着す
ると、ペン体は気密部４２によつて密封され、か
つ、係止部である係止爪４３が筆記具本体の環状
突起に係合して抜け落ちなくなる。そして、筆記
に際して、筆記具本体をキヤツプから抜くと、気
密部４２の内容積が小さくて内面がテーパー状で
あるために、直ちに大気が侵入し、ペン体の周囲
は減圧状態にはならない。従つて、インキが過大
に吸い出されることがなく、手などを汚したり、
筆記中にインキがボタ落ちする不具合が解消され
る。 When this cap is attached to the writing instrument body, the pen body is sealed by the airtight portion 42, and the locking claw 43, which is a locking portion, engages with the annular projection of the writing instrument body, so that it does not fall off. When the main body of the writing instrument is removed from the cap when writing, the air-tight portion 42 has a small internal volume and a tapered inner surface, so air immediately enters the pen body and the area around the pen body is not in a reduced pressure state. Therefore, the ink will not be sucked out excessively and will not stain your hands or the like.
This solves the problem of ink dripping while writing.
次に、内筒４を射出成形するための金型構造を
説明する。固定型５は内筒４の内面を成形する型
であり、可動型６は内筒４の外面を成形する型で
あるが、型締めすると、第２図に示すように、キ
ヤビテイ７が郭定される。そして図示略のランナ
ーとゲートから溶融した合成樹脂がキヤビテイ７
に注入され、内筒４が成形される。ここで、スリ
ツト成形型６１が可動型６に一体になつており、
型締めすると、スリツト成形型６１が固定型５に
接触する。従つて、射出成形時にスリツト４５が
同時に成形される。このため、射出成形後の二次
加工が不要になり、工程が簡単になつて生産性が
向上する。 Next, a mold structure for injection molding the inner cylinder 4 will be explained. The fixed mold 5 is a mold for molding the inner surface of the inner cylinder 4, and the movable mold 6 is a mold for molding the outer surface of the inner cylinder 4. When the molds are clamped, the cavity 7 is defined as shown in FIG. be done. Then, the molten synthetic resin from the runner and gate (not shown) flows into the cavity 7.
The inner cylinder 4 is molded. Here, the slit mold 61 is integrated with the movable mold 6,
When the molds are clamped, the slit mold 61 comes into contact with the fixed mold 5. Therefore, the slit 45 is molded at the same time during injection molding. This eliminates the need for secondary processing after injection molding, which simplifies the process and improves productivity.
以上説明したように、本考案のキヤツプは、内
筒の肩部から軸線方向に通気用のスリツトが形成
されているので、射出成形時にスリツトが同時に
成形され、通気孔を穿設するための二次加工が不
要になる。従つて、簡単に製造できて生産性の高
く、筆記具本体をキヤツプから抜くときにインキ
が過大に吸い出されことのない筆記具用キヤツプ
とすることができる。
As explained above, in the cap of the present invention, the slit for ventilation is formed in the axial direction from the shoulder of the inner cylinder, so the slit is simultaneously molded during injection molding, and the second cap is used to form the ventilation hole. No further processing is required. Therefore, it is possible to provide a writing instrument cap that is easy to manufacture, has high productivity, and prevents ink from being sucked out excessively when the writing instrument body is removed from the cap.
第１図は本考案実施例の断面図、第２図は金型
構造の説明図、第３図は第２図の−線におけ
る断面図である。
１……キヤツプ本体、２……クリツプ、３……
蓋栓、４……内筒、４２……気密部、４３……係
止爪、４４……肩部、４５……スリツト、５……
固定型、６……可動型、６１……スリツト成形
型。
FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an explanatory view of the mold structure, and FIG. 3 is a sectional view taken along the - line in FIG. 2. 1...Cap body, 2...Clip, 3...
Lid stopper, 4...Inner cylinder, 42...Airtight part, 43...Latching claw, 44...Shoulder part, 45...Slit, 5...
Fixed type, 6...Movable type, 61...Slit mold.
Claims (1)
もに、合口側に筆記具本体の環状突起に係合する
係止部が形成された合成樹脂製の内筒がキヤツプ
本体内に配設さた筆記具用キヤツプにおいて、 前記内筒の外周に肩部が形成され、この肩部は
該肩部から該係止部にかけての内筒の肉厚と同等
かやや大きく、この肩部から該係止部の方向に伸
びる通気用のスリツトが設けられたことを特徴と
する筆記具用キヤツプ。[Scope of Claim for Utility Model Registration] The cap body consists of an inner cylinder made of synthetic resin that has an airtight part for sealing the pen body on the back side and a locking part that engages with the annular protrusion of the writing instrument body on the abutment side. In the writing instrument cap disposed inside, a shoulder is formed on the outer periphery of the inner cylinder, and this shoulder is equal to or slightly larger than the wall thickness of the inner cylinder from the shoulder to the locking part. 1. A cap for a writing instrument, characterized in that a slit for ventilation is provided extending from the portion toward the locking portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987037940U JPH058156Y2 (en) | 1987-03-17 | 1987-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987037940U JPH058156Y2 (en) | 1987-03-17 | 1987-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63145679U JPS63145679U (en) | 1988-09-26 |
| JPH058156Y2 true JPH058156Y2 (en) | 1993-03-01 |
Family
ID=30849720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987037940U Expired - Lifetime JPH058156Y2 (en) | 1987-03-17 | 1987-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH058156Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2597688Y2 (en) * | 1992-06-19 | 1999-07-12 | 三菱鉛筆株式会社 | Caps for writing instruments |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916229U (en) * | 1982-07-22 | 1984-01-31 | 株式会社クボタ | work vehicle |
-
1987
- 1987-03-17 JP JP1987037940U patent/JPH058156Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916229U (en) * | 1982-07-22 | 1984-01-31 | 株式会社クボタ | work vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63145679U (en) | 1988-09-26 |
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