JP2010228130A

JP2010228130A - Front shaft tube of fountain pen

Info

Publication number: JP2010228130A
Application number: JP2009075468A
Authority: JP
Inventors: Kiyotaka Yoshino; 清隆芳野
Original assignee: Pilot Corp
Current assignee: Pilot Corp
Priority date: 2009-03-26
Filing date: 2009-03-26
Publication date: 2010-10-14

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front shaft tube of a fountain pen preventing contact of a gate mark of a grip part with a finger when assembled as a fountain pen for writing, in the front shaft tube of the fountain pen with a grip member made of an elastic resin arranged by secondary molding in a peripheral surface of a shaft body formed by primary molding. <P>SOLUTION: The gate mark 7 of the grip member 6 in the secondary molding is arranged to be positioned in a position in the vicinity of the rear end edge 6b of the peripheral surface 6a of the grip member 6. In the front end of the shaft body 4, a flat plate-like pen point 8 as the fountain pen is attached so that the center line P of the surface 8a of the pen point 8 is positioned substantially in the same position as that in the peripheral direction in the shaft body 4 of the gate mark 7, and forming the front shaft tube 1 of the fountain pen is formed thereby. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、万年筆の前軸筒に関する。 The present invention relates to a front barrel of a fountain pen.

従来、万年筆の前軸筒において、一次成形により形成した軸体の外周面に、弾性樹脂からなるグリップ部材を二次成形により配した軸体の先端に、平板状のペン先を挿着したものは知られている。こうした射出成形により形成した軸体やグリップ部材では、金型内面に樹脂を流し込むためのゲートが必要となり、成形物にはゲート跡がかならず形成されてしまう。 Conventionally, in the front barrel of a fountain pen, a flat nib is inserted into the tip of a shaft that has been formed by secondary molding of a grip member made of elastic resin on the outer peripheral surface of the shaft formed by primary molding. Is known. In the shaft body and grip member formed by such injection molding, a gate for pouring the resin into the inner surface of the mold is necessary, and a gate mark is always formed on the molded product.

一次成形により形成した軸体の外周面に二次成形により配したグリップ部材のゲート跡は、グリップ部材の外表面に形成されているのが一般的である。そのために、このような前軸筒を装着した万年筆で筆記するためにグリップ部を把持すると、グリップ部材のゲート跡が指に触れてしまい、筆記者に不快感を与えてしまうと言う問題があった。 Generally, the gate mark of the grip member disposed by secondary molding on the outer peripheral surface of the shaft body formed by primary molding is formed on the outer surface of the grip member. Therefore, if the grip part is gripped for writing with a fountain pen equipped with such a front shaft cylinder, the gate mark of the grip member touches the finger, which causes the writer to feel uncomfortable. It was.

こうした問題を解消する手段として、グリップ部材の前端縁部に設ける技術が特開２００３−５４１８０号公報により提案されているが、万年筆においては、ペン先の先端から前軸筒の前方端までの距離が比較的長いので、グリップ部の前側端部を把持する人が少なくなく、そのために、ゲート跡をグリップ部材の前端縁部に設けても、ゲート跡が指に触れてしまい不快感を感じる人達がいるのが現状である。 As a means for solving such a problem, Japanese Patent Application Laid-Open No. 2003-54180 proposes a technique for providing the grip member at the front end edge, but in a fountain pen, the distance from the tip of the pen tip to the front end of the front barrel Is relatively long, so there are not many people who grip the front end of the grip part, so even if the gate mark is provided on the front edge of the grip member, the gate mark touches the finger and feels uncomfortable There is a current situation.

特開２００３−５４１８０号公報JP 2003-54180 A

本発明はこうした事実に鑑みなされたもので、一次成形により形成した軸体の外周面に、弾性樹脂からなるグリップ部材を二次成形により配した軸体の先端に、平板状のペン先を装着した万年筆の前軸筒において、万年筆として組立てて筆記する際に、グリップ部のゲート跡が指等に触れることのないような、万年筆の前軸筒を提案するものである。 The present invention has been made in view of these facts, and a flat nib is attached to the end of a shaft body in which a grip member made of an elastic resin is arranged by secondary molding on the outer peripheral surface of the shaft body formed by primary molding. In this case, the fountain pen front shaft cylinder is proposed so that the gate mark of the grip portion does not touch a finger or the like when the fountain pen is assembled and written as a fountain pen.

本発明は、
「１．後端部にインキカートリッジを収容する後軸筒内に着脱自在に接続する接続筒部を有した一次成形により形成した軸体の把持部の外周面に、弾性樹脂からなるグリップ部材を二次成形により配し、軸体の先端にペン先を装着してなる万年筆の前軸筒において、前記グリップ部材の二次成形時のゲート跡がグリップ部材の外周面の後端縁部の近傍の位置となるようにグリップ部材を二次成形し、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにペン先を軸体の先端に装着してなる、万年筆の前軸筒。
２．前記一次成形時の軸体のゲート跡を、接続筒部の外周面上に、目印となる平地部または凹部を形成して該平地部または凹部に設け、グリップ部材の二次成形時のゲート跡が軸体の周方向における一次成形時のゲート跡の位置と略同一上に位置するように、または１８０度ずれた位置となるようにグリップ部材を二次成形し、軸体の先端にペン先を、軸体の周方向においてペン先の表面の中心線の位置と一次成形時における凹溝の位置とが略同一上に位置するように、または略１８０度ずれた位置となるように装着して、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにした、前記１項に記載の万年筆の前軸筒。
３．前記接続筒部の外周面上で、グリップ部材の二次成形時のゲート跡の軸体の周方向における位置と略同一上の位置にまたは１８０度ずれた位置に、凸状または凹状に形成した視認可能な目印を設け、軸体の先端にペン先を、軸体の周方向においてペン先の表面の中心線の位置と目印の位置とが略同一上に位置するように、または略１８０度ずれた位置となるように装着して、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにした、前記１項に記載の万年筆の前軸筒。」
である。 The present invention
“1. A grip member made of an elastic resin is provided on the outer peripheral surface of a grip portion of a shaft body formed by primary molding having a connecting cylinder portion that is detachably connected to a rear shaft cylinder that houses an ink cartridge at a rear end portion. In the front barrel of a fountain pen that is arranged by secondary molding and has a pen tip attached to the tip of the shaft body, the gate mark at the time of secondary molding of the grip member is near the rear edge of the outer peripheral surface of the grip member The grip member is secondarily molded so that the position of the center of the pen tip in the circumferential direction of the front barrel and the position of the gate mark in the second molding are substantially the same. A front barrel of a fountain pen with a nib attached to the tip of the shaft.
2. The gate mark of the shaft body at the time of the primary molding is formed on the outer peripheral surface of the connecting cylinder portion by forming a flat ground portion or a concave portion as a mark and provided in the flat ground portion or the concave portion. The grip member is secondarily molded so that is positioned substantially the same as the position of the gate mark at the time of primary molding in the circumferential direction of the shaft body, or at a position shifted by 180 degrees, and the pen tip is placed at the tip of the shaft body. Is mounted so that the position of the center line of the surface of the pen tip and the position of the groove in the primary molding are substantially the same in the circumferential direction of the shaft body, or a position shifted by approximately 180 degrees. The front shaft of the fountain pen as set forth in claim 1, wherein the position of the center line of the surface of the nib in the circumferential direction of the front shaft cylinder and the position of the gate mark at the time of secondary molding are positioned substantially the same. Tube.
3. On the outer peripheral surface of the connecting cylinder portion, a convex shape or a concave shape is formed at a position substantially the same as the position of the shaft trace in the circumferential direction of the shaft body during the secondary molding of the grip member or at a position shifted by 180 degrees. Provide a visible mark, place the pen tip at the tip of the shaft body, and the center line position of the pen tip surface in the circumferential direction of the shaft body and the position of the mark are approximately the same, or approximately 180 degrees Attached so as to be shifted, the position of the center line of the surface of the pen tip in the circumferential direction of the front barrel and the position of the gate mark at the time of secondary molding are positioned substantially the same, The front barrel of the fountain pen as set forth in item 1. "
It is.

本発明は、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにするものであるが、一般的に、射出成形時における成形物に生じるゲート跡においては、見た目も良くなく、従来より目立たないように工夫されている。前記グリップ部材におけるゲート跡においてもしかりで、ゲート跡は目視では判別し難いが、触感では気になるということがある。こうした場合は、前記グリップ部材におけるゲート跡を目視しながら、ペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにペン先を前軸筒の先端に装着するのは、難があり作業性が悪いので、グリップ部材におけるゲート跡が目視で判別し難い場合には、請求項２や請求項３に係る発明のように、万年筆として組立てた際には、外方に露出しない軸体の接続筒部に目印となるものを形成して、それを目標にして、ペン先を軸体の先端に装着すれば、前記の作業性上の問題は解消できる。接続筒部は、後軸筒内に挿入されるので、本発明の前軸筒を万年筆として組立てた際の美観上の問題は生じない。 The present invention is such that the position of the center line of the surface of the pen tip in the circumferential direction of the front barrel and the position of the gate mark at the time of secondary molding are located substantially on the same, The gate trace generated in the molded product at the time of injection molding does not look good and has been devised so that it is less noticeable than before. The gate trace on the grip member is also a problem, and it is difficult to visually distinguish the gate trace. In such a case, while observing the gate mark on the grip member, the front end cylinder is positioned so that the position of the center line of the surface of the pen tip and the position of the gate mark at the time of secondary molding are substantially the same. Since it is difficult to attach to the tip of the handle and the workability is poor, when it is difficult to visually identify the gate mark on the grip member, it is assembled as a fountain pen as in the inventions according to claim 2 and claim 3. In this case, if the connecting cylinder part of the shaft body that is not exposed to the outside is formed as a mark, and the pen tip is attached to the tip of the shaft body with the target as a target, the above-mentioned problem in workability Can be resolved. Since the connecting tube portion is inserted into the rear shaft tube, there is no aesthetic problem when the front shaft tube of the present invention is assembled as a fountain pen.

本発明は前記したような構造なので、グリップ部材のゲート跡の軸体における周方向の位置と、前軸筒の先端に装着したペン先の表面の中心線の軸体における周方向の位置とが略同一なので、本発明の前軸筒を組立てて万年筆として筆記する際は、グリップ部材のゲート跡が前記のような位置であれば、筆記者が前軸筒のグリップ部を把持しても指等がグリップ部材のゲート跡に触れることがないので、筆記時の不快感ひいては筆記感を損なうことがない。なお、万年筆においては、筆記の際にはペン先の周方向の傾きに制約を受けるので、グリップ部材の把持の仕方においてそれ程個人差はなく、グリップ部材の把持の仕方により前記効果が左右されることはない。 Since the present invention has the above-described structure, the circumferential position of the grip mark gate trace shaft body and the circumferential position of the center line shaft body of the nib surface attached to the tip of the front barrel are determined. When the front shaft cylinder of the present invention is assembled and written as a fountain pen, if the gate mark of the grip member is in the position as described above, the writer can grasp the grip part of the front shaft cylinder. And the like do not touch the gate trace of the grip member, so that uncomfortable feelings at the time of writing and thus the writing feeling are not impaired. In the case of a fountain pen, since there is a restriction on the circumferential inclination of the pen tip when writing, there is not much individual difference in the way of gripping the grip member, and the above effect is influenced by the way of gripping the grip member. There is nothing.

請求項２や請求項３に係る発明とすることで、グリップ部材のゲート跡を視覚的に目立たないようにしたものであっても、ペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにペン先を前軸筒の先端に装着することができ、筆記時に指等に触れることのない、万年筆の前軸筒を得ることができる。 Even if the gate trace of the grip member is not visually noticeable by the invention according to claim 2 or claim 3, the position of the center line of the surface of the pen tip and the secondary molding The pen tip can be attached to the tip of the front shaft cylinder so that the gate mark position is substantially the same, and a front shaft cylinder of a fountain pen that does not touch a finger or the like during writing can be obtained.

本発明の第１の実施例を示す、万年筆の前軸筒の側面図である。It is a side view of the front axis cylinder of a fountain pen which shows the 1st example of the present invention. 本発明の第２の実施例を示す、万年筆の前軸筒の側面図である。It is a side view of the front barrel of a fountain pen showing a second embodiment of the present invention. 本発明の第３の実施例を示す、万年筆の前軸筒の側面図である。It is a side view of the front barrel of a fountain pen showing a third embodiment of the present invention. 本発明の第４の実施例を示す、万年筆の前軸筒の側面図である。It is a side view of the front barrel of a fountain pen, showing a fourth embodiment of the present invention.

本発明の万年筆の前軸筒は、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにするものである。 The front barrel of the fountain pen of the present invention is such that the position of the center line of the surface of the pen tip in the circumferential direction of the front barrel and the position of the gate mark at the time of secondary molding are substantially the same. .

以下、本発明の筆記具の実施例を図面を用いて説明するが、各実施例において、同じ部材、同じ箇所を示す場合は同じ符号を付してある。 Hereinafter, although the Example of the writing instrument of this invention is described using drawing, in each Example, the same code | symbol is attached | subjected when showing the same member and the same location.

図１に示す第１の実施例の万年筆の前軸筒１は、後端部にインキカートリッジ（図示せず）を収容する後軸筒２（二点差線で表示）と着脱自在に螺着する接続筒部３を有した軸体４を、射出成形の一次成形により形成してある。一次成形時におけるゲート跡５は、接続筒部３の外周面３ａ上に位置するように設けてある。 The front barrel 1 of the fountain pen of the first embodiment shown in FIG. 1 is detachably screwed to a rear barrel 2 (indicated by a two-dot chain line) that accommodates an ink cartridge (not shown) at the rear end. The shaft body 4 having the connecting cylinder portion 3 is formed by primary molding of injection molding. The gate mark 5 at the time of primary molding is provided so as to be located on the outer peripheral surface 3 a of the connection tube portion 3.

軸体４の把持部４ａの外周面（図示せず）に弾性樹脂からなるグリップ部材６を二次成形により配するが、二次成形時におけるグリップ部材６のゲート跡７は、グリップ部材６の外周面６ａの後端縁部６ｂの近傍の位置に位置するように設けてある。 A grip member 6 made of an elastic resin is arranged on the outer peripheral surface (not shown) of the grip portion 4a of the shaft body 4 by secondary molding. The gate trace 7 of the grip member 6 at the time of secondary molding is It is provided so as to be positioned in the vicinity of the rear end edge 6b of the outer peripheral surface 6a.

軸体４の先端に、万年筆としての平板状のペン先８を、該ペン先８の表面８ａの中心線Ｐがグリップ部材６のゲート跡７の軸体４における周方向の位置と略同一位置となるように、ゲート跡７を目標にして装着し、万年筆の前軸筒１を形成する。 A flat pen tip 8 as a fountain pen is placed at the tip of the shaft body 4, and the center line P of the surface 8 a of the pen tip 8 is substantially the same position as the circumferential position of the gate mark 7 of the grip member 6 in the shaft body 4. Thus, the gate mark 7 is attached as a target, and the front barrel 1 of the fountain pen is formed.

図２は、請求項２に係る発明を示す第２の実施例の万年筆の前軸筒２１で、二次成形時におけるグリップ部材のゲート跡が目立たないように工夫された場合であって、第１の実施例と同様に、後端部にインキカートリッジ（図示せず）を収容する後軸筒２（二点差線で表示）内に着脱自在に接続する接続筒部３を有した軸体４を、射出成形の一次成形により形成してあり、一次成形時におけるゲート跡２２は、接続筒部３の外周面３ａ上の後端部３ｂに、後端に開口した凹溝２３が形成されるようにして、該凹溝２３の内部に位置するように設けてある。 FIG. 2 is a front shaft cylinder 21 of the fountain pen of the second embodiment showing the invention according to claim 2, and is a case where the gate mark of the grip member is not conspicuous at the time of secondary molding, As in the first embodiment, a shaft body 4 having a connecting tube portion 3 that is detachably connected to a rear shaft tube 2 (indicated by a two-dot chain line) that accommodates an ink cartridge (not shown) at the rear end portion. The gate mark 22 at the time of the primary molding is formed in the rear end portion 3b on the outer peripheral surface 3a of the connecting cylinder portion 3 with a concave groove 23 opened at the rear end. Thus, it is provided so as to be located inside the concave groove 23.

第１の実施例と同様に、軸体４の把持部４ａの外周面（図示せず）に、弾性樹脂からなるグリップ部材６を二次成形により配してあり、二次成形時におけるグリップ部材６のゲート跡７は、グリップ部材６の外周面６ａの後端縁部６ｂの近傍の位置で、前記一次成形時のゲート跡２２の軸体４における周方向の位置と同一位置上に設けてある。 As in the first embodiment, a grip member 6 made of an elastic resin is arranged on the outer peripheral surface (not shown) of the grip portion 4a of the shaft body 4 by secondary molding, and the grip member at the time of secondary molding 6 is provided at a position in the vicinity of the rear edge 6b of the outer peripheral surface 6a of the grip member 6 and at the same position as the circumferential position of the shaft body 4 of the gate mark 22 during the primary molding. is there.

軸体４の先端に、万年筆としての平板状のペン先８を、該ペン先８の表面８ａの中心線Ｐが凹溝２３の軸体４における周方向の位置と略同一位置となるように、凹溝２３を目標にして装着し、万年筆の前軸筒２１を形成する。なお、図２においては、グリップ部材６のゲート跡７を、便宜上第１の実施例と同じ大きさとしてあるが、実際はゲート跡７が目立たないような工夫がされたゲート跡の大きさや形状のものである。 A flat pen tip 8 as a fountain pen is placed at the tip of the shaft body 4 so that the center line P of the surface 8a of the pen tip 8 is substantially the same position as the circumferential direction of the shaft body 4 of the groove 23. The concave groove 23 is mounted as a target, and the front barrel 21 of the fountain pen is formed. In FIG. 2, the gate trace 7 of the grip member 6 has the same size as that of the first embodiment for the sake of convenience, but the gate trace size and shape are devised so that the gate trace 7 is not conspicuous in practice. Is.

図３は、請求項２に係る発明の他の実施例を示し、第３の実施例の万年筆の前軸筒３１は、二次成形時におけるグリップ部材のゲート跡が目立たないように工夫された場合であって、第１の実施例と同様に、後端部３ａにインキカートリッジ（図示せず）を収容する後軸筒２（二点差線で表示）内に着脱自在に接続する接続筒部３を有した軸体４を、射出成形の一次成形により形成してあり、一次成形時におけるゲート跡３２は、接続筒部３の外周面３ａ上に平地部３３を形成し、該平地部３３に位置するように設けてある。 FIG. 3 shows another embodiment of the invention according to claim 2, and the front shaft cylinder 31 of the fountain pen of the third embodiment is devised so that the gate marks of the grip member are not conspicuous at the time of secondary molding. In the same manner as in the first embodiment, the connecting cylinder part is detachably connected to the rear cylinder 2 (indicated by a two-dot chain line) that accommodates an ink cartridge (not shown) in the rear end part 3a. 3 is formed by primary molding of injection molding, and the gate mark 32 at the time of primary molding forms a flat ground portion 33 on the outer peripheral surface 3a of the connecting cylinder portion 3, and the flat ground portion 33 is formed. It is provided so that it may be located in.

第１の実施例と同様に、軸体４の把持部４ａの外周面（図示せず）に、弾性樹脂からなるグリップ部材６を二次成形により配してあり、二次成形時におけるグリップ部材６のゲート跡７は、グリップ部材６の外周面６ａの後端縁部６ｂの近傍の位置で、前記ゲート跡３２の軸体４における周方向の位置と同一位置上に設けてある。 As in the first embodiment, a grip member 6 made of an elastic resin is arranged on the outer peripheral surface (not shown) of the grip portion 4a of the shaft body 4 by secondary molding, and the grip member at the time of secondary molding The gate trace 7 is provided in the vicinity of the rear end edge 6b of the outer peripheral surface 6a of the grip member 6 and on the same position as the circumferential position of the shaft trace 4 of the gate trace 32.

軸体４の先端に、万年筆としての平板状のペン先８を、該ペン先８の表面８ａの中心線Ｐが平地部３３の軸体４における周方向の位置と略同一位置となるように、平地部３３を目標にして装着し、万年筆の前軸筒３１を形成する。なお、図３においては、グリップ部材６のゲート跡７を、第１の実施例と同じ大きさとしてあるが、前記第２の実施例と同様に、実際はゲート跡７が目立たないような工夫がされたゲート跡の大きさや形状のものである。 A flat nib 8 as a fountain pen is placed at the tip of the shaft 4 so that the center line P of the surface 8a of the nib 8 is substantially the same position as the circumferential position of the flat body 33 in the shaft 4. The flat part 33 is mounted as a target, and the front barrel 31 of the fountain pen is formed. In FIG. 3, the gate mark 7 of the grip member 6 has the same size as that of the first embodiment. However, like the second embodiment, the gate trace 7 is actually not conspicuous. The size and shape of the traced gate.

図４は、請求項３に係る発明の実施例を示し、第４の実施例の万年筆の前軸筒４１は、二次成形時におけるグリップ部材のゲート跡が目立たないように工夫された場合であって、第１の実施例と同様に、後端部にインキカートリッジ（図示せず）を収容する後軸筒２（二点差線で表示）内に着脱自在に接続する接続筒部３を有した軸体４を、射出成形の一次成形により形成してあり、一次成形時におけるゲート跡４２は、接続筒部３の外周面３ａ上の後端部３ｂに位置するように設けてある。また、接続筒部３の外周面３ａ上で前記ゲート跡４２の軸体４における周方向の位置と同一位置上には、凹状に形成した目印４３を設けてある。なお、本実施例における一次成形時のゲート跡４２は、接続筒部３の外周面３ａ上に設けたが、ペン先を装着する軸体４の先端面４ｂに設けたものであっても良い。 FIG. 4 shows an embodiment of the invention according to claim 3, and the front shaft cylinder 41 of the fountain pen of the fourth embodiment is devised so that the gate trace of the grip member at the time of secondary molding is not conspicuous. In the same manner as in the first embodiment, there is a connecting cylinder portion 3 that is detachably connected to a rear barrel 2 (indicated by a two-dot chain line) that accommodates an ink cartridge (not shown) at the rear end. The shaft body 4 is formed by primary molding of injection molding, and the gate mark 42 at the time of primary molding is provided so as to be positioned at the rear end portion 3b on the outer peripheral surface 3a of the connecting cylinder portion 3. A mark 43 formed in a concave shape is provided on the outer peripheral surface 3a of the connecting cylinder portion 3 on the same position as the position of the gate mark 42 in the circumferential direction of the shaft body 4. In addition, although the gate mark 42 at the time of the primary molding in the present embodiment is provided on the outer peripheral surface 3a of the connection cylinder portion 3, it may be provided on the tip surface 4b of the shaft body 4 on which the pen tip is mounted. .

第１の実施例と同様に、軸体４の把持部４ａの外周面（図示せず）に、弾性樹脂からなるグリップ部材６を二次成形により配してあり、二次成形時におけるグリップ部材６のゲート跡７は、グリップ部材６の外周面６ａの後端縁部６ｂの近傍の位置で、前記ゲート跡４２の軸体４における周方向の位置と同一位置上に設けてある。 As in the first embodiment, a grip member 6 made of an elastic resin is arranged on the outer peripheral surface (not shown) of the grip portion 4a of the shaft body 4 by secondary molding, and the grip member at the time of secondary molding 6 is provided at a position in the vicinity of the rear edge 6b of the outer peripheral surface 6a of the grip member 6 and on the same position as the circumferential position of the shaft trace 4 of the gate trace 42.

軸体４の先端に、万年筆としての平板状のペン先８を、該ペン先８の表面８ａの中心線Ｐが目印４３の軸体４における周方向の位置と略同一位置となるように、目印４３を目標にして装着し、万年筆の前軸筒４１を形成する。なお、図４においては、軸体４の一次成形時のゲート跡４２とグリップ部材６の二次成形時のゲート跡７を、便宜上第１の実施例と同じ大きさとしてあるが、前記第２の実施例と同様に、実際は各々のゲート跡７、４２が目立たないような工夫がされたゲート跡の大きさや形状のものである。 At the tip of the shaft body 4, a flat pen tip 8 as a fountain pen is placed so that the center line P of the surface 8 a of the pen tip 8 is substantially the same position as the circumferential position of the mark 43 on the shaft body 4. The mark 43 is attached as a target to form the front shaft cylinder 41 of the fountain pen. In FIG. 4, the gate trace 42 at the time of primary molding of the shaft body 4 and the gate trace 7 at the time of secondary molding of the grip member 6 are the same size as in the first embodiment for the sake of convenience. As in the first embodiment, the gate traces 7 and 42 are actually the size and shape of the gate traces that are not conspicuous.

本実施例の万年筆の前軸筒１、２１、３１、４１を、万年筆として組立てて各々の前軸筒１、２１、３１、４１を把持して筆記する際には、親指と人差指でグリップ部材６の二点差線で示したＡの部分とＢの部分を挟持し、中指でグリップ部材６の二点差線で示したＣの部分（ペン先の表面８ａと反対側の部分）を支持して把持することになり、ゲート跡７に触れることはない。グリップ部材６の後方（各図において右側方向）を把持したとしても、ゲート跡７はペン先８の表面８ａの中心線Ｐ上に位置しているので、中指がゲート跡７に触れることはない。 When the front barrels 1, 21, 31, 41 of the fountain pen of this embodiment are assembled as fountain pens and each front barrel 1, 21, 31, 41 is gripped and written, a grip member is used with the thumb and index finger. 6 is sandwiched between the A portion and B portion indicated by the two-dot difference line, and the middle finger supports the C portion (the portion opposite to the pen tip surface 8a) indicated by the two-point difference line of the grip member 6. The gate mark 7 is not touched. Even if the grip member 6 is gripped rearward (to the right in each figure), the gate mark 7 is located on the center line P of the surface 8a of the pen tip 8, so that the middle finger does not touch the gate mark 7. .

本発明は、一次成形により形成した軸体の外周面に、弾性樹脂からなるグリップ部材を二次成形により配した軸体の先端に、平板状のペン先を装着した万年筆の前軸筒において、万年筆として組立てて筆記する際に、グリップ部のゲート跡が指等に触れることのないような、先端にペン先を装着した万年筆の前軸筒に適用するものである。 In the front shaft cylinder of the fountain pen in which a flat nib is attached to the tip of the shaft body in which a grip member made of an elastic resin is arranged on the outer peripheral surface of the shaft body formed by primary molding, When assembled and written as a fountain pen, it is applied to the front shaft cylinder of a fountain pen with a pen tip attached so that the gate mark of the grip portion does not touch a finger or the like.

１、２１、３１、４１前軸筒
２後軸筒
３接続筒
４軸体
５、２２、３２、４２ゲート跡
６グリップ部材
７ゲート跡
８ペン先
２３凹溝
３３平地部
４３目印
Ｐ中心線 1, 21, 31, 41 Front shaft cylinder 2 Rear shaft cylinder 3 Connection cylinder 4 Shaft body 5, 22, 32, 42 Gate trace 6 Grip member 7 Gate trace 8 Pen tip 23 Groove 33 Flat ground portion 43 Mark P Center line

Claims

後端部にインキカートリッジを収容する後軸筒内に着脱自在に接続する接続筒部を有した一次成形により形成した軸体の把持部の外周面に、弾性樹脂からなるグリップ部材を二次成形により配し、軸体の先端にペン先を装着してなる万年筆の前軸筒において、前記グリップ部材の二次成形時のゲート跡がグリップ部材の外周面の後端縁部の近傍の位置となるようにグリップ部材を二次成形し、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにペン先を軸体の先端に装着してなる、万年筆の前軸筒。 A grip member made of an elastic resin is secondarily formed on the outer peripheral surface of the grip portion of the shaft body formed by the primary molding having a connecting cylinder portion that is detachably connected to the rear barrel that accommodates the ink cartridge at the rear end. In the front shaft cylinder of the fountain pen formed by attaching a pen tip to the tip of the shaft body, the gate mark at the time of secondary molding of the grip member is a position near the rear edge of the outer peripheral surface of the grip member. The grip member is secondarily molded so that the position of the center line of the surface of the nib surface in the circumferential direction of the front barrel and the position of the gate mark at the time of secondary molding are substantially the same. A front barrel of a fountain pen that is attached to the tip of the shaft.

前記一次成形時の軸体のゲート跡を、接続筒部の外周面上に、目印となる平地部または凹部を形成して該平地部または凹部に設け、グリップ部材の二次成形時のゲート跡が軸体の周方向における一次成形時のゲート跡の位置と略同一上に位置するように、または１８０度ずれた位置となるようにグリップ部材を二次成形し、軸体の先端にペン先を、軸体の周方向においてペン先の表面の中心線の位置と一次成形時における凹溝の位置とが略同一上に位置するように、または略１８０度ずれた位置となるように装着して、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにした、請求項１に記載の万年筆の前軸筒。 The gate mark of the shaft body at the time of the primary molding is formed on the outer peripheral surface of the connecting cylinder portion by forming a flat ground portion or a concave portion as a mark and provided in the flat ground portion or the concave portion. The grip member is secondarily molded so that is positioned substantially the same as the position of the gate mark at the time of primary molding in the circumferential direction of the shaft body, or at a position shifted by 180 degrees, and the pen tip is placed at the tip of the shaft body. Is mounted so that the position of the center line of the surface of the pen tip and the position of the groove in the primary molding are substantially the same in the circumferential direction of the shaft body, or a position shifted by approximately 180 degrees. The front shaft of the fountain pen according to claim 1, wherein the position of the center line of the surface of the pen tip in the circumferential direction of the front tube and the position of the gate mark at the time of secondary molding are positioned substantially the same. Tube.

前記接続筒部の外周面上で、グリップ部材の二次成形時のゲート跡の軸体の周方向における位置と略同一上の位置にまたは１８０度ずれた位置に、凸状または凹状に形成した視認可能な目印を設け、軸体の先端にペン先を、軸体の周方向においてペン先の表面の中心線の位置と目印の位置とが略同一上に位置するように、または略１８０度ずれた位置となるように装着して、前軸筒の周方向におけるペン先の表面の中心線の位置と二次成形時のゲート跡の位置とが略同一上に位置するようにした、請求項１に記載の万年筆の前軸筒。 On the outer peripheral surface of the connecting cylinder portion, a convex shape or a concave shape is formed at a position substantially the same as the position of the shaft trace in the circumferential direction of the shaft body during the secondary molding of the grip member or at a position shifted by 180 degrees. Provide a visible mark, place the pen tip at the tip of the shaft body, and the center line position of the pen tip surface in the circumferential direction of the shaft body and the position of the mark are approximately the same, or approximately 180 degrees It is mounted so as to be shifted, and the position of the center line of the surface of the pen tip in the circumferential direction of the front barrel and the position of the gate mark at the time of secondary molding are positioned substantially the same. The front barrel of the fountain pen according to Item 1.