本考案は前記従来の問題点を解決するものであって、製造工程において、連通管と隔壁との接続隅部にクラックが発生することや、連通管と隔壁との接続隅部で連通管が折損することを防止できる直液式筆記具を提供しようとするものである。
The present invention solves the above-mentioned conventional problems. In the manufacturing process, cracks occur at the connection corner between the communication pipe and the partition wall, and the communication pipe is formed at the connection corner between the communication pipe and the partition wall. It is an object of the present invention to provide a direct liquid writing instrument that can prevent breakage.
[１]本考案は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され、インキ１４を直に貯溜するインキタンク１２と、前記インキタンク１２とインキ吸蔵体３との間に配置される隔壁８と、前記隔壁８前面より前方に突出され且つ前記インキタンク１２と前記インキ吸蔵体３との間を接続する連通管９とを備えた直液式筆記具であって、前記連通管９と前記隔壁８とを一体に形成し、前記連通管９の基部外面と前記隔壁８前面との接続隅部に肉盛部９１を形成してなることを要件とする。
[1] The present invention includes a pen nib 2, an ink occlusion body 3 connected to the rear end of the nib 2, and an ink tank 12 which is disposed behind the ink occlusion body 3 and directly stores ink 14. And a partition wall 8 disposed between the ink tank 12 and the ink storage body 3, and a communication pipe protruding forward from the front surface of the partition wall 8 and connecting between the ink tank 12 and the ink storage body 3. 9, wherein the communication pipe 9 and the partition wall 8 are integrally formed, and a built-up portion 91 is formed at a connecting corner between the base outer surface of the communication pipe 9 and the front surface of the partition wall 8. It is a requirement to form.
前記直液式筆記具１は、連通管９の基部外面と隔壁８前面との接続隅部に肉盛部９１を形成してなることにより、連通管９と隔壁８との接続隅部（即ち、連通管９の基部外面と隔壁８前面との接続隅部に）に加わる応力を分散でき、その結果、製造工程（例えば、部品成形時、または部品組立時）において、連通管９と隔壁８との接続隅部にクラックが発生することや、連通管９と隔壁８との接続隅部で連通管９が折損することを十分に防止できる。前記肉盛部９１の外面は、外径が後方に向かうに従い大きくなる形状を有すること（例えば、傾斜面、凹曲面または凸曲面であること）が好ましく、それにより、より一層、連通管９と隔壁８との接続隅部に加わる応力を分散できる。
The direct liquid writing instrument 1 is formed by forming a built-up portion 91 at the connection corner between the base outer surface of the communication tube 9 and the front surface of the partition wall 8, so that the connection corner between the communication tube 9 and the partition wall 8 (that is, The stress applied to the connecting corner between the base outer surface of the communication tube 9 and the front surface of the partition wall 8 can be dispersed. As a result, in the manufacturing process (for example, during component molding or component assembly), the communication tube 9 and the partition wall 8 It is possible to sufficiently prevent cracks from occurring at the connecting corners of the connecting tube 9 and breakage of the connecting tube 9 at the connecting corners of the connecting tube 9 and the partition wall 8. It is preferable that the outer surface of the built-up portion 91 has a shape in which the outer diameter increases toward the rear (for example, an inclined surface, a concave curved surface, or a convex curved surface). The stress applied to the connecting corner with the partition wall 8 can be dispersed.
[２]前記直液式筆記具１において、隔壁８前面に前後方向に延びるリブ８１を一体に形成し、前記リブ８１と連通管９の側壁とを一体に形成してなることが好ましい。それにより、隔壁８に対する連通管９の折れ強度が向上し、その結果、製造工程（例えば、部品成形時、または部品組立時）において、連通管９と隔壁８との接続隅部にクラックが発生することや、連通管９と隔壁８との接続隅部で連通管９が折損することを、より一層、防止できる。
[2] In the direct liquid writing instrument 1, it is preferable that a rib 81 extending in the front-rear direction is integrally formed on the front surface of the partition wall 8, and the rib 81 and the side wall of the communication pipe 9 are formed integrally. As a result, the bending strength of the communication pipe 9 with respect to the partition wall 8 is improved, and as a result, cracks are generated at the connecting corners of the communication pipe 9 and the partition wall 8 in the manufacturing process (for example, during component molding or component assembly). It is possible to further prevent the communication tube 9 from being broken at the connecting corner between the communication tube 9 and the partition wall 8.
[３]前記直液式筆記具１おいて、リブ８１前端と連通管９の側壁外面との接続隅部に肉盛部９２を形成してなることが好ましい。それにより、リブ８１前端と連通管９の側壁外面との接続隅部に加わる応力を分散でき、その結果、製造工程（例えば、部品成形時、または部品組立時）において、リブ８１前端と連通管９の側壁外面との接続隅部にクラックが発生することや、リブ８１前端と連通管９の側壁外面との接続隅部で連通管９が折損することを十分に防止できる。前記肉盛部９２の外面は、外径が後方に向かうに従い大きくなる形状を有すること（例えば、傾斜面、凹曲面または凸曲面であること）が好ましく、それにより、より一層、リブ８１前端と連通管９の側壁外面との接続隅部に加わる応力を分散できる。
[3] In the direct liquid writing instrument 1, it is preferable that a built-up portion 92 is formed at a connection corner between the front end of the rib 81 and the outer surface of the side wall of the communication tube 9. As a result, the stress applied to the connecting corner between the front end of the rib 81 and the outer surface of the side wall of the communication pipe 9 can be dispersed. As a result, the front end of the rib 81 and the communication pipe in the manufacturing process (for example, during component molding or component assembly). 9 can be sufficiently prevented from cracking at the connecting corner with the outer surface of the side wall 9 and breaking of the connecting tube 9 at the connecting corner between the front end of the rib 81 and the outer surface of the side wall of the connecting tube 9. It is preferable that the outer surface of the built-up portion 92 has a shape in which the outer diameter increases toward the rear (for example, an inclined surface, a concave curved surface, or a convex curved surface). It is possible to disperse the stress applied to the connecting corner portion of the communicating tube 9 with the side wall outer surface.
[４]また、本考案は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され、インキ１４を直に貯溜するインキタンク１２と、前記インキタンク１２とインキ吸蔵体３との間に配置される隔壁８と、前記隔壁８前面より前方に突出され且つ前記インキタンク１２と前記インキ吸蔵体３との間を接続する連通管９とを備えた直液式筆記具であって、前記連通管９と前記隔壁８とを一体に形成し、前記隔壁８前面に前後方向に延びるリブ８１を一体に形成し、前記リブ８１と連通管９の側壁とを一体に形成し、前記リブ８１前端と前記連通管９の側壁外面との接続隅部に肉盛部９２を形成してなることを要件とする。
[4] Further, the present invention provides a pen nib 2, an ink occlusion body 3 connected to the rear end of the nib 2, and an ink which is disposed behind the ink occlusion body 3 and directly stores the ink 14. A tank 12, a partition wall 8 disposed between the ink tank 12 and the ink storage body 3, a front projection from the front surface of the partition wall 8, and a connection between the ink tank 12 and the ink storage body 3. It is a direct liquid type writing instrument provided with the communication pipe 9, Comprising: The said communication pipe 9 and the said partition 8 are formed integrally, The rib 81 extended in the front-back direction is integrally formed in the front surface of the said partition 8, The said rib 81 And the side wall of the communication pipe 9 are integrally formed, and a built-up portion 92 is formed at the connecting corner between the front end of the rib 81 and the side wall outer surface of the communication pipe 9.
前記直液式筆記具１は、隔壁８前面に前後方向に延びるリブ８１を一体に形成し、前記リブ８１と連通管９の側壁外面とを一体に形成してなることにより、隔壁８に対する連通管９の折れ強度が向上し、その結果、製造工程（例えば、部品成形時、または部品組立時）において、連通管９と隔壁８との接続隅部にクラックが発生することや、連通管９と隔壁８との接続隅部で連通管９が折損することを防止できる。
The direct liquid writing instrument 1 is formed by integrally forming a rib 81 extending in the front-rear direction on the front surface of the partition wall 8, and integrally forming the rib 81 and the side wall outer surface of the communication tube 9. As a result, in the manufacturing process (for example, at the time of component molding or component assembly), cracks may occur at the connecting corners of the communication pipe 9 and the partition wall 8, and the communication pipe 9 It is possible to prevent the communication pipe 9 from being broken at the connection corner with the partition wall 8.
さらに、前記直液式筆記具１は、リブ８１前端と連通管９の側壁外面との接続隅部に肉盛部９２を形成してなることにより、リブ８１前端と連通管９の側壁外面との接続隅部に加わる応力を分散でき、その結果、製造工程（例えば、部品成形時、または部品組立時）において、リブ８１前端と連通管９の側壁外面との接続隅部にクラックが発生することや、リブ８１前端と連通管９の側壁外面との接続隅部で連通管９が折損することを十分に防止できる。尚、前記肉盛部９２の外面は、外径が後方に向かうに従い大きくなる形状を有すること（例えば、傾斜面、凹曲面または凸曲面であること）が好ましく、それにより、より一層、リブ８１前端と連通管９の側壁外面との接続隅部に加わる応力を分散できる。
Furthermore, the direct liquid type writing instrument 1 is formed by forming a built-up portion 92 at a connection corner between the front end of the rib 81 and the side wall outer surface of the communication pipe 9, so that the front end of the rib 81 and the side wall outer surface of the communication pipe 9 are formed. The stress applied to the connection corner can be dispersed, and as a result, cracks are generated in the connection corner between the front end of the rib 81 and the outer surface of the side wall of the communication pipe 9 in the manufacturing process (for example, during component molding or component assembly). In addition, it is possible to sufficiently prevent the communication tube 9 from being broken at the connecting corner between the front end of the rib 81 and the outer surface of the side wall of the communication tube 9. In addition, it is preferable that the outer surface of the build-up portion 92 has a shape in which the outer diameter increases toward the rear (for example, an inclined surface, a concave curved surface, or a convex curved surface). The stress applied to the connecting corner between the front end and the side wall outer surface of the communication tube 9 can be dispersed.
[５]前記直液式筆記具１おいて、前記肉盛部９１または前記肉盛部９２の外面が、縦断面アール状の凹曲面からなることが好ましい。それにより、接続隅部での応力をできる限り分散でき、接続隅部にクラックが発生することや、接続隅部で連通管９が折損することを、より一層、防止できる。
[5] In the direct liquid writing instrument 1, it is preferable that the outer surface of the built-up portion 91 or the built-up portion 92 is a concave curved surface having a round cross section. Thereby, the stress at the connection corner can be dispersed as much as possible, and the occurrence of cracks at the connection corner and the breakage of the communication tube 9 at the connection corner can be further prevented.
[６]さらに、前記直液式筆記具１において、連通管９の外径を前方に向かうに従い小さく設定してなることが好ましい。それにより、隔壁８に対する連通管９の折れ強度が向上し、その結果、製造工程において、連通管９と隔壁８との接続隅部にクラックが発生することや、連通管９と隔壁８との接続隅部で連通管９が折損することを、より一層、防止できる。
[6] Further, in the direct liquid writing instrument 1, it is preferable that the outer diameter of the communication tube 9 is set to be smaller toward the front. As a result, the bending strength of the communication pipe 9 with respect to the partition wall 8 is improved. As a result, in the manufacturing process, cracks are generated at the connecting corners of the communication pipe 9 and the partition wall 8, and It is possible to further prevent the communication pipe 9 from being broken at the connection corner.
また、前記連通管９の外径を前方に向かうに従い小さく設定してなる構成により、連通管９と隔壁８との一体部品を成形する際、金型の前後方向の離型が容易となる。また、前記連通管９の外径を前方に向かうに従い小さく設定してなる構成により、連通管９の前端をインキ吸蔵体３に突き刺し接続する構成を採用した場合に、連通管９の前端をインキ吸蔵体３にスムーズに突き刺すことができる。
In addition, the configuration in which the outer diameter of the communication tube 9 is set to be smaller toward the front makes it easy to release the mold in the front-rear direction when forming an integral part of the communication tube 9 and the partition wall 8. Further, when the structure in which the outer diameter of the communication pipe 9 is set smaller as it goes forward is employed, the front end of the communication pipe 9 is inserted into the ink occlusion body 3 and connected. The occlusion body 3 can be smoothly pierced.
また、前記直液式筆記具１において、前記リブ８１をインキ吸蔵体３の後端面に当接させることが好ましい。それにより、インキ吸蔵体３の後方移動を規制するとともに、隔壁８前面とインキ吸蔵体３の後端面との間に外気と連通する隙間（空気通路）を確実に形成できる。さらに、前記リブ８１をインキ吸蔵体３の後端面と当接可能に構成した場合、前記リブ８１は、インキ吸蔵体３後端面との安定した当接が得られる点で、横断面放射状に設けることが好ましい。
In the direct liquid writing instrument 1, it is preferable that the rib 81 is brought into contact with the rear end surface of the ink occlusion body 3. Thus, the backward movement of the ink storage body 3 is restricted, and a gap (air passage) communicating with outside air can be reliably formed between the front surface of the partition wall 8 and the rear end surface of the ink storage body 3. Further, when the rib 81 is configured to be able to contact the rear end surface of the ink storage body 3, the rib 81 is provided in a radial cross section in that stable contact with the rear end surface of the ink storage body 3 is obtained. It is preferable.
尚、本考案で、前記連通管９及び隔壁８は、合成樹脂の成形体からなることが好ましい。また、前記連通管９の外周面及び内周面の横断面形状は、例えば、円形、楕円、または３角形、４角形等の多角形等、いずれであってもよい。また、前記連通管９の本数は、１本でもよいし、複数本（即ち２本以上）でもよい。また、前記連通管９の各々の前端は、開口されていればよく、例えば、軸方向前方に開口してもよいし、径方向外方に開口してもよい。前記連通管９の各々の前端の形状は、例えば、傾斜カット面、垂直面、円錐面、凸曲面等が挙げられる。また、前記連通管９の一つの後端を、隔壁８の後面より後方に突出させ且つインキタンク１２内に位置させてもよい。本考案で、連通管９は、インキタンク１２とインキ吸蔵体３との間をインキ流通可能にする。
In the present invention, the communication pipe 9 and the partition wall 8 are preferably made of a synthetic resin molding. Moreover, the cross-sectional shape of the outer peripheral surface and the inner peripheral surface of the communication pipe 9 may be any of, for example, a circle, an ellipse, or a polygon such as a triangle or a quadrangle. Further, the number of the communication pipes 9 may be one or plural (that is, two or more). Further, the front end of each of the communication pipes 9 only needs to be opened. For example, it may be opened forward in the axial direction or may be opened outward in the radial direction. Examples of the shape of the front end of each of the communication pipes 9 include an inclined cut surface, a vertical surface, a conical surface, and a convex curved surface. Further, one rear end of the communication pipe 9 may protrude rearward from the rear surface of the partition wall 8 and may be positioned in the ink tank 12. In the present invention, the communication pipe 9 allows ink to flow between the ink tank 12 and the ink storage body 3.
尚、本考案で、前記インキ吸蔵体３は、インキを含浸可能な連続気孔を有する部材（即ち多孔質材料）からなるものであればよく、例えば、繊維束の熱融着加工体、繊維束の樹脂加工体、フェルトの樹脂加工体、フェルトのニードルパンチ加工体、合成樹脂の連続気泡体等が挙げられる。また、前記インキ吸蔵体３は、その外周面に合成樹脂フィルム等よりなる外皮を備える構成でもよい。前記インキ吸蔵体３は、単一の部材であってもよいし、毛細管力の異なる複数の部材を組み合わせたものであってもよい。
In the present invention, the ink occlusion body 3 may be made of a member having continuous pores that can be impregnated with ink (that is, a porous material). Resin processed body, felt resin processed body, felt needle punch processed body, synthetic resin open cell body, and the like. In addition, the ink occlusion body 3 may be configured to have an outer skin made of a synthetic resin film or the like on the outer peripheral surface thereof. The ink occlusion body 3 may be a single member or a combination of a plurality of members having different capillary forces.
尚、本考案で、前記ペン先２は、例えば、繊維束の樹脂加工体、繊維束の熱融着加工体、フェルト加工体、パイプ状ペン体、先端にスリットを有する万年筆型板状ペン体、毛筆ペン体、合成樹脂の多孔質気泡体、ボールペンチップ、軸方向のインキ誘導路を有する合成樹脂の押出成形体、あるいはこれらを組み合わせたもの等が挙げられる。本考案で、前記ペン先２の後端を構成する部材（インキ誘導部材）は、少なくとも、インキ吸蔵体３との適正な接続を可能にするために毛細間隙を備えた部材であればよく、例えば、繊維束の樹脂加工体、繊維束の熱融着加工体、フェルト加工体、合成樹脂の多孔質気泡体等の多孔質材料、または軸方向のインキ誘導路を有する合成樹脂の押出成形体が挙げられる。即ち、本考案で、前記ペン先２はインキ誘導部材を含む。
In the present invention, the nib 2 is, for example, a resin processed body of a fiber bundle, a heat-bonded processed body of a fiber bundle, a felt processed body, a pipe-shaped pen body, and a fountain pen type plate-shaped pen body having a slit at the tip. A brush pen body, a porous foam of a synthetic resin, a ball-point pen tip, a synthetic resin extrusion having an ink guide path in the axial direction, or a combination thereof. In the present invention, the member constituting the rear end of the pen nib 2 (ink guiding member) may be at least a member having a capillary gap to enable proper connection with the ink occlusion body 3, For example, a fiber bundle resin processed body, a fiber bundle heat-bonded processed body, a felt processed body, a porous material such as a synthetic resin porous foam, or a synthetic resin extrusion molded body having an axial ink guide path Is mentioned. That is, in the present invention, the nib 2 includes an ink guide member.
尚、本考案で、インキタンク１２内に貯溜されるインキ１４は、具体的には、筆記具用インキ（例えば、水性インキ、油性インキ）または塗布液（例えば、化粧液、修正液、接着剤、塗料、液体医薬品等）が挙げられる。
In the present invention, the ink 14 stored in the ink tank 12 is specifically a writing instrument ink (for example, water-based ink, oil-based ink) or a coating liquid (for example, cosmetic liquid, correction liquid, adhesive, Paint, liquid medicine, etc.).
本考案の直液式筆記具は、製造工程において、連通管と隔壁との接続隅部にクラックが発生することや、連通管と隔壁との接続隅部で連通管が折損することを十分に防止できる。
The direct liquid writing instrument of the present invention sufficiently prevents cracks from occurring at the connection corner between the communication pipe and the partition wall and breaks the communication pipe at the connection corner between the communication pipe and the partition wall during the manufacturing process. it can.
また、本考案の直液式筆記具は、製造工程において、リブ前端と連通管の側壁外面との接続隅部にクラックが発生することや、リブ前端と連通管の側壁外面との接続隅部で連通管が折損することを十分に防止できる。
Further, in the direct liquid writing instrument of the present invention, in the manufacturing process, cracks occur at the connection corner between the rib front end and the side wall outer surface of the communication pipe, or at the connection corner between the rib front end and the side wall outer surface of the communication pipe. It is possible to sufficiently prevent the communication pipe from being broken.
[第１の実施の形態（図１乃至図４参照）]
本考案の第１の実施の形態の直液式筆記具１を以下に説明する。
本実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置される中間部材７と、前記中間部材７の後方に配置されるインキタンク１２と、前端部で前記ペン先２を保持し且つ内部に前記インキ吸蔵体３、前記中間部材７、及び前記インキタンク１２の３部品を収容する軸筒４とからなる。
[First embodiment (see FIGS. 1 to 4)]
The direct liquid writing instrument 1 according to the first embodiment of the present invention will be described below.
The direct liquid writing instrument 1 of the present embodiment includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, an intermediate member 7 disposed behind the ink occlusion body 3, and The ink tank 12 disposed behind the intermediate member 7, the pen tip 2 is held at the front end portion, and the ink storage body 3, the intermediate member 7, and the ink tank 12 are accommodated therein. It consists of a shaft tube 4.
・ペン先
前記ペン先２は、合成樹脂製繊維（例えば、ポリエステル繊維、アクリル繊維、ナイロン繊維等）の樹脂加工により得られる棒状体である。前記ペン先２の前端は、砲弾状に研削される。前記ペン先２の後端部外周面は、テーパ状に面取りされる。
Pen nib The nib 2 is a rod-like body obtained by resin processing of synthetic resin fibers (for example, polyester fibers, acrylic fibers, nylon fibers, etc.). The front end of the nib 2 is ground like a bullet. The outer peripheral surface of the rear end portion of the nib 2 is chamfered in a tapered shape.
・インキ吸蔵体
前記インキ吸蔵体３は、円柱状の合成樹脂製繊維（例えば、ポリエステル繊維）の加工体よりなる。前記インキ吸蔵体３の外周面には、円筒状の外皮が被覆されている。前記外皮は、合成樹脂製フィルム（例えば、ポリエチレンテレフタレート製フィルム）よりなる。前記インキ吸蔵体３の前端面の軸心にペン先２の後端が突き刺し挿入され、前記ペン先２の後端が前記インキ吸蔵体３の内部に位置される。
Ink occlusion body The ink occlusion body 3 is made of a processed body of cylindrical synthetic resin fibers (for example, polyester fibers). The outer peripheral surface of the ink occlusion body 3 is covered with a cylindrical outer skin. The outer skin is made of a synthetic resin film (for example, a polyethylene terephthalate film). The rear end of the pen tip 2 is inserted into the axial center of the front end surface of the ink storage member 3 and the rear end of the pen tip 2 is positioned inside the ink storage member 3.
・軸筒
前記軸筒４は、前軸５と、該前軸５の後端開口部に着脱自在に螺着される後軸６とからなり、前軸５及び後軸６は、両者共に、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形により得られる筒状体である。前記前軸５は、ペン先２の外周面を保持する先細部５１と、該先細部５１より後方に連設され、インキ吸蔵体３と隔壁８とインキタンク１２前部とが収容される本体部５２とからなる。前記後軸６は、前端が開口され且つ後端が閉鎖された有底筒状体であり、前記後軸６の前端開口部が前記前軸５の後端開口部に螺着されると、前記後軸６内部にインキタンク１２の後部が収容される。
The shaft cylinder 4 includes a front shaft 5 and a rear shaft 6 that is detachably screwed into a rear end opening of the front shaft 5. The front shaft 5 and the rear shaft 6 are both It is a cylindrical body obtained by injection molding of synthetic resin (for example, polypropylene, polyethylene, etc.). The front shaft 5 is provided with a tip 51 for holding the outer peripheral surface of the nib 2 and a main body that is connected to the rear of the tip 51 and accommodates the ink occlusion body 3, the partition wall 8, and the front portion of the ink tank 12. Part 52. The rear shaft 6 is a bottomed cylindrical body having a front end opened and a rear end closed, and when the front end opening of the rear shaft 6 is screwed to the rear end opening of the front shaft 5, A rear portion of the ink tank 12 is accommodated in the rear shaft 6.
前記前軸５の内面（即ち先細部５１の内面から本体部５２の前部内面まで）には、前後方向に延びる複数本のリブ５３が一体に形成される。前記リブ５３には、前記前軸５の先細部５１と本体部５２との接続部の近傍において、段形状の規制壁部５３ａが形成される。前記規制壁部５３ａにインキ吸蔵体３の前端面が軸方向に当接し、前記本体部５２の前部内面のリブ５３にインキ吸蔵体３の外周面が径方向に圧接保持される。前記先細部５１内面のリブ５３により、ペン先２の外周面が径方向に圧接保持される。前記リブ５３の、前記ペン先２の外周面を保持する箇所と、前記インキ吸蔵体３の外周面を保持する箇所との間に、筒状壁部５３ｂが一体に形成される。
A plurality of ribs 53 extending in the front-rear direction are integrally formed on the inner surface of the front shaft 5 (that is, from the inner surface of the tapered portion 51 to the inner surface of the front portion of the main body 52). In the rib 53, a step-shaped regulating wall portion 53 a is formed in the vicinity of the connecting portion between the tip 51 of the front shaft 5 and the main body portion 52. The front end surface of the ink occlusion body 3 abuts against the restriction wall portion 53a in the axial direction, and the outer peripheral surface of the ink occlusion body 3 is pressed and held in the radial direction by the rib 53 on the inner surface of the front portion of the main body portion 52. The outer peripheral surface of the nib 2 is pressed and held in the radial direction by the rib 53 on the inner surface of the tapered portion 51. A cylindrical wall portion 53b is integrally formed between a portion of the rib 53 that holds the outer peripheral surface of the nib 2 and a portion that holds the outer peripheral surface of the ink storage member 3.
前記リブ５３により、インキ吸蔵体３の外周面と本体部５２の内面との間、インキ吸蔵体３の前端面と前軸５の内面との間、及びペン先２の外周面と先細部５１の内面との間に、空気通路が形成される。前記空気通路の前側は、前軸５の前端より外部に開口されるとともに、前記空気通路の後側は、インキ吸蔵体３の後端面と連通される。即ち、前記空気通路により、インキ吸蔵体３の前端面及びインキ吸蔵体３の後端面が、外気と連通される。
By the rib 53, between the outer peripheral surface of the ink storage body 3 and the inner surface of the main body 52, between the front end surface of the ink storage body 3 and the inner surface of the front shaft 5, and the outer peripheral surface and the tip 51 of the pen tip 2. An air passage is formed between the inner surface and the inner surface. The front side of the air passage is opened to the outside from the front end of the front shaft 5, and the rear side of the air passage is communicated with the rear end surface of the ink storage member 3. That is, the air passage allows the front end surface of the ink storage body 3 and the rear end surface of the ink storage body 3 to communicate with the outside air.
・中間部材
前記中間部材７は、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形より得られる。前記中間部材７は、インキ吸蔵体収容部とインキタンク１２とを区画する隔壁８と、前記隔壁８の前面より前方に突出され且つインキ吸蔵体３の内部に突き刺し接続される複数本（具体的には２本）の連通管９と、前記隔壁８の後面より後方に突出され且つインキタンク１２の前端開口部に挿着される接続管１０と、前記隔壁８の後面より後方に突出され且つ軸筒４の内面（本体部５２の内面）に固着される取付筒部１１とを備える。軸筒４及び隔壁８によって形成される空間（即ち吸蔵体収容部）に、インキ吸蔵体３が収容される。前記取付筒部１１は接続管１０の基部外周を包囲している。前記接続管１０には栓体１３の片側を押圧するための突片１０ａが一体に形成される。前記隔壁８は円板状であり、前記連通管９の各々、前記接続管１０、及び前記取付筒部１１は、円筒状である。
Intermediate member The intermediate member 7 is obtained by injection molding of a synthetic resin (for example, polypropylene, polyethylene, etc.). The intermediate member 7 includes a partition wall 8 that divides the ink storage body accommodating portion and the ink tank 12, and a plurality of intermediate members that protrude forward from the front surface of the partition wall 8 and are pierced and connected to the inside of the ink storage body 3 (specifically 2) communicating pipes 9, a connecting pipe 10 projecting rearward from the rear surface of the partition wall 8 and inserted into the front end opening of the ink tank 12, and projecting rearward from the rear surface of the partition wall 8; And an attachment cylinder portion 11 fixed to the inner surface of the shaft tube 4 (the inner surface of the main body portion 52). The ink occlusion body 3 is accommodated in a space (that is, an occlusion body accommodation portion) formed by the shaft cylinder 4 and the partition wall 8. The mounting cylinder portion 11 surrounds the outer periphery of the base portion of the connecting pipe 10. The connecting pipe 10 is integrally formed with a protruding piece 10a for pressing one side of the plug 13. The partition wall 8 has a disk shape, and each of the communication pipes 9, the connection pipe 10, and the attachment cylinder part 11 have a cylindrical shape.
前記中間部材７において、隔壁８、連通管９、接続管１０、及び取付筒部１１は一体に連設される（即ち一体に形成される）。即ち、前記中間部材７により、隔壁８、連通管９、接続管１０、及び取付筒部１１を１部品で構成できる。
In the intermediate member 7, the partition wall 8, the communication pipe 9, the connection pipe 10, and the mounting cylinder portion 11 are integrally connected (that is, formed integrally). That is, the intermediate member 7 makes it possible to configure the partition wall 8, the communication tube 9, the connection tube 10, and the mounting cylinder portion 11 with one component.
・連通管
前記連通管９の各々の内部には、軸方向に流通路９３が設けられ、前記流通路９３が、前記連通管９の各々の両端にて開口される。前記連通管９の各々の前端は、インキ吸蔵体３の内部に開口され、前記連通管９の各々の後端は、隔壁８の後端より後方へインキタンク１２内に開口される。前記各々の連通管９は、インキ吸蔵体３とインキタンク１２との間に並列に配置されるため、インキ吸蔵体３と、その後方のインキタンク１２との間に、独立した複数本の流通路９３が並列に設けられる。前記連通管９の各々の流通路９３は、接続管１０内に位置する隔壁８の、軸心より離れた箇所に貫通される。前記連通管９の外径及び前記連通管９の内径（流通路９３内径）は、前方に向かうに従い小さくなるよう設定される。
-Communication pipe The flow path 93 is provided in the inside of each of the communication pipes 9 in the axial direction, and the flow path 93 is opened at both ends of each of the communication pipes 9. A front end of each of the communication pipes 9 is opened in the ink storage body 3, and a rear end of each of the communication pipes 9 is opened in the ink tank 12 behind the rear end of the partition wall 8. Since each of the communication pipes 9 is arranged in parallel between the ink occluding body 3 and the ink tank 12, a plurality of independent circulations are provided between the ink occluding body 3 and the ink tank 12 behind the ink occluding body 3. A path 93 is provided in parallel. Each of the flow passages 93 of the communication pipe 9 is penetrated to a part of the partition wall 8 located in the connection pipe 10 away from the axis. The outer diameter of the communication pipe 9 and the inner diameter of the communication pipe 9 (inner diameter of the flow passage 93) are set so as to decrease toward the front.
前記連通管９の各々の前端は、インキ吸蔵体３の後端から前方に突き刺し挿入され、最後はインキ吸蔵体３の内部のペン先２後端近傍に位置される。前記連通管９の各々の前端がインキ吸蔵体３に突き刺し挿入される際、連通管９の各々の前端がインキ吸蔵体３の繊維を前方に押圧圧縮する。それにより、各々の連通管９の前端近傍（即ちペン先２後端近傍）のインキ吸蔵体３の繊維密度が、連通管９の各々の前端近傍以外の部分のインキ吸蔵体３の繊維密度よりも高く設定される。
The front end of each of the communication pipes 9 is inserted by being stabbed forward from the rear end of the ink storage body 3, and finally located near the rear end of the pen tip 2 inside the ink storage body 3. When the front ends of the communication pipes 9 are inserted into the ink storage body 3, the front ends of the communication pipes 9 press and compress the fibers of the ink storage body 3 forward. Thereby, the fiber density of the ink storage body 3 in the vicinity of the front end of each communication pipe 9 (that is, in the vicinity of the rear end of the pen tip 2) is greater than the fiber density of the ink storage body 3 in the portion other than the vicinity of each front end of the communication pipe 9. Is also set high.
前記ペン先２がインキ吸蔵体３の軸心に位置しているので、前記連通管９の各々の前端は、ペン先２の後端と直接接続されず、ペン先２と非接触状態にあり、インキ吸蔵体３の内部を介してインキ流通可能に接続される。また、前記連通管９の各々の前端は、ペン先２の後端より僅かに後方に位置している。
Since the nib 2 is located at the axial center of the ink occlusion body 3, the front end of each of the communication pipes 9 is not directly connected to the rear end of the nib 2 and is not in contact with the nib 2. The ink occluding body 3 is connected to be able to distribute ink. Further, the front end of each of the communication pipes 9 is located slightly behind the rear end of the pen tip 2.
・リブ
前記隔壁８の前面には、前後方向に延びる板状のリブ８１が一体に形成される。前記リブ８１がインキ吸蔵体３の後端面と当接される。前記リブ８１により、前記隔壁８と前記インキ吸蔵体３の後端面との間には、外気と連通する隙間が形成される。前記隙間は、前記空気通路を介して、外気と連通される。前記リブ８１は、横断面放射状（ここでは十字状）に形成される。前記リブ８１の一部は各々の連通管９の基部の間に形成され、各々の連通管９の基部側壁が連結される。それにより、各々の連通管９の屈曲強度が向上し、各々の連通管９の隔壁８に対する折れ曲がりを抑えることができる。
Ribs A plate-like rib 81 extending in the front-rear direction is integrally formed on the front surface of the partition wall 8. The rib 81 is brought into contact with the rear end surface of the ink storage member 3. A gap communicating with the outside air is formed by the rib 81 between the partition wall 8 and the rear end surface of the ink storage body 3. The gap communicates with the outside air through the air passage. The ribs 81 are formed in a radial cross section (here, a cross shape). A part of the rib 81 is formed between the base portions of the communication pipes 9 and the base side walls of the communication pipes 9 are connected. Thereby, the bending strength of each communicating pipe 9 is improved, and the bending of each communicating pipe 9 with respect to the partition wall 8 can be suppressed.
本実施の形態において、前記連通管９は、その各々が、インキタンク１２内のインキ１４をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク１２内に供給する機能とを備える。インキタンク１２内のインキ１４をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク１２内のインキ１４が、少なくとも一つの連通管９を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管９を通ってインキタンク１２内に取り込まれる。
In the present embodiment, each of the communication pipes 9 has a function of supplying the ink 14 in the ink tank 12 into the ink storage body 3 and a function of supplying outside air into the ink tank 12. When supplying the ink 14 in the ink tank 12 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 14 in the ink tank 12 passes through at least one communication pipe 9 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, outside air is taken into the ink tank 12 through the other communication pipe 9.
前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管９の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク１２内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管９によるインキタンク１２からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管９の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク１２からのインキ流出とインキタンク１２への空気流入（即ちインキと空気の交替）が停止状態となる。
When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication tube 9 that has taken in the outside air is in a liquid-sealed state with the impregnating ink, and is temporarily closed. The supply of outside air into the tank 12 is stopped. At the same time, the supply of ink from the ink tank 12 to the ink occlusion body 3 by the communication pipe 9 that has been supplying the ink is also stopped. As a result, each front end opening of the communication pipe 9 is in a liquid-sealed state temporarily. The ink tank 12 is closed, and ink outflow from the ink tank 12 and air inflow into the ink tank 12 (that is, replacement of ink and air) are stopped.
前記連通管９の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管９の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク１２からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。
Since the front end of each of the communication pipes 9 is positioned inside the ink storage body 3, all the front end openings of each of the communication pipes 9 are covered with an ink liquid seal impregnated inside the ink storage body 3. Can be easily closed. As a result, excessive ink is not supplied from the ink tank 12 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.
また、本実施の形態では、前記連通管９を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管９がインキ供給を行う場合、他の連通管９が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。
In the present embodiment, by providing a plurality of communication pipes 9 (that is, two or more), when at least one communication pipe 9 supplies ink, the other communication pipe 9 supplies air. become. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.
また、本実施の形態では、インキ吸蔵体３の後端面と隔壁８前面との間に、外気と通気可能な隙間を形成したことにより、インキ吸蔵体３の内部の空気を、インキ吸蔵体３の後端面から外部に逃がすことができる。それにより、温度上昇等によるインキタンク１２内の圧力上昇時、インキタンク１２内から押し出されたインキが、スムーズに連通管９の前端よりインキ吸蔵体３の連通管９の前端近傍を介して後方へ移動し、インキ吸蔵体３の後方に含浸され、インキの外部への漏出を防ぎ、一方、温度低下等によるインキタンク１２内の圧力減少時、インキ吸蔵体３の後方の含浸インキを、インキ吸蔵体３内部の連通管９の前端近傍を介して連通管９の前端開口部より連通管９内を通してインキタンク１２内に戻すことができる。特に、リブ８１により、インキ吸蔵体３の後方移動が規制されるとともに、インキ吸蔵体３の後端面と隔壁８の前面との間に、前記隙間を確実に形成することができる。
Further, in the present embodiment, a gap that allows air and air to pass between the rear end surface of the ink storage body 3 and the front surface of the partition wall 8 is formed, so that the air inside the ink storage body 3 is changed to the ink storage body 3. It can escape from the rear end face to the outside. Thereby, when the pressure in the ink tank 12 rises due to a temperature rise or the like, the ink pushed out from the ink tank 12 smoothly passes from the front end of the communication pipe 9 to the rear through the vicinity of the front end of the communication pipe 9 of the ink storage body 3. The ink is impregnated behind the ink occlusion body 3 to prevent leakage of the ink to the outside. On the other hand, when the pressure in the ink tank 12 is reduced due to a temperature drop or the like, It can be returned to the ink tank 12 through the communication pipe 9 from the front end opening of the communication pipe 9 through the vicinity of the front end of the communication pipe 9 inside the occlusion body 3. In particular, the rib 81 restricts the backward movement of the ink occlusion body 3 and can reliably form the gap between the rear end surface of the ink occlusion body 3 and the front surface of the partition wall 8.
・凹曲面
前記各々の連通管９の基部外面と隔壁８前面との接続隅部には、縦断面アール状の凹曲面９１（肉盛部）が環状に一体に形成される。前記凹曲面９１により、連通管９の基部（接続隅部）の外径が、後方に向かうに従い次第に大きくなるよう設定される。また、前記各々の連通管９の側壁外面とリブ８１前端との接続隅部には、縦断面アール状の凹曲面９２（肉盛部）が一体に形成される。前記凹曲面９２により、連通管９側壁外面とリブ８１前端との接続隅部の外径が、後方に向かうに従い次第に大きくなるよう設定される。前記凹曲面９１及び前記凹曲面９２の曲率半径は、０．５ｍｍ（ミリメートル）以上に設定され、それにより、接続隅部におけるクラックや折損を十分に防止できる。また、前記凹曲面９２の曲率半径は、３ｍｍ（ミリメートル）以下に設定され、それにより、リブ８１前端がインキ吸蔵体３の後端面に安定して当接できる。
Concave surface A concave curved surface 91 (building-up portion) having a round cross section is integrally formed in an annular shape at the connecting corner between the outer surface of the base portion of each communication pipe 9 and the front surface of the partition wall 8. Due to the concave curved surface 91, the outer diameter of the base portion (connection corner portion) of the communication pipe 9 is set to gradually increase toward the rear. In addition, a concave curved surface 92 (built-up portion) having a rounded cross section is integrally formed at a connection corner portion between the outer surface of the side wall of each communication pipe 9 and the front end of the rib 81. Due to the concave curved surface 92, the outer diameter of the connection corner between the outer surface of the side wall of the communication pipe 9 and the front end of the rib 81 is set to gradually increase toward the rear. The curvature radii of the concave curved surface 91 and the concave curved surface 92 are set to 0.5 mm (millimeters) or more, thereby sufficiently preventing cracks and breakage at the connection corners. Further, the radius of curvature of the concave curved surface 92 is set to 3 mm (millimeters) or less, so that the front end of the rib 81 can stably come into contact with the rear end surface of the ink storage body 3.
・インキタンク
前記インキタンク１２は、前端が開口し且つ後端が閉鎖された有底筒状体であり、合成樹脂の射出成形またはブロー成形により得られる。前記インキタンク１２内には、直にインキ１４が貯溜される。前記インキタンク１２内に貯溜されるインキ１４は、筆記具用インキ（例えば、水性インキ、油性インキ）または塗布液（例えば、化粧液、修正液、接着剤、塗料、液体医薬品等）のいずれであってもよい。
Ink tank The ink tank 12 is a bottomed cylindrical body having a front end opened and a rear end closed, and is obtained by injection molding or blow molding of a synthetic resin. Ink 14 is stored directly in the ink tank 12. The ink 14 stored in the ink tank 12 is either a writing instrument ink (for example, water-based ink, oil-based ink) or a coating liquid (for example, cosmetic liquid, correction liquid, adhesive, paint, liquid medicine, etc.). May be.
前記インキタンク１２の前端開口部内面は、中間部材７の接続管１０外面が着脱自在に嵌着される。前記インキタンク１２のインキが消費され筆記不能となった場合、前記インキタンク１２を接続管１０から取り外し、内部にインキが充填された新たなインキタンク１２の前端開口部に接続管１０を挿着する。それにより、再び、筆記可能となる。前記新たなインキタンク１２の前端開口部は、栓体１３により閉鎖されている。接続管１０をインキタンク１２の前端開口部に挿着した際、前記栓体１３が接続管１０の突片１０ａにより後方に押圧され、それにより、栓体１３が外され、インキタンク１２の前端開口部が開栓される。
The inner surface of the front end opening of the ink tank 12 is detachably fitted to the outer surface of the connecting pipe 10 of the intermediate member 7. When ink in the ink tank 12 is consumed and writing becomes impossible, the ink tank 12 is removed from the connection pipe 10 and the connection pipe 10 is inserted into the front end opening of a new ink tank 12 filled with ink. To do. Thereby, writing becomes possible again. A front end opening of the new ink tank 12 is closed by a stopper 13. When the connecting pipe 10 is inserted into the front end opening of the ink tank 12, the plug body 13 is pushed backward by the protruding piece 10 a of the connecting pipe 10, whereby the plug body 13 is removed and the front end of the ink tank 12 is removed. The opening is opened.
[第２の実施の形態（図５乃至図８参照）]
本考案の第２の実施の形態の直液式筆記具１を以下に説明する。
本実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置される中間部材７と、前記中間部材７の後方に配置されるインキタンク１２と、前端部で前記ペン先２を保持し且つ内部に前記インキ吸蔵体３、前記中間部材７、及び前記インキタンク１２の３部品を収容する軸筒４とからなる。
[Second Embodiment (see FIGS. 5 to 8)]
A direct liquid writing instrument 1 according to a second embodiment of the present invention will be described below.
The direct liquid writing instrument 1 of the present embodiment includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, an intermediate member 7 disposed behind the ink occlusion body 3, and The ink tank 12 disposed behind the intermediate member 7, the pen tip 2 is held at the front end portion, and the ink storage body 3, the intermediate member 7, and the ink tank 12 are accommodated therein. It consists of a shaft tube 4.
・ペン先
前記ペン先２は、合成樹脂製繊維（例えば、ポリエステル繊維、アクリル繊維、ナイロン繊維等）の樹脂加工により得られる棒状体である。前記ペン先２の前端は、砲弾状に研削される。前記ペン先２の後端部外周面は、テーパ状に面取りされる。本実施の形態のペン先２は、前記第１の実施の形態のペン先２に比べ、外径が小さいものが採用され、それにより、第１の実施の形態のペン先２に比べ、細い筆跡幅が得られる。
Pen nib The nib 2 is a rod-like body obtained by resin processing of synthetic resin fibers (for example, polyester fibers, acrylic fibers, nylon fibers, etc.). The front end of the nib 2 is ground like a bullet. The outer peripheral surface of the rear end portion of the nib 2 is chamfered in a tapered shape. The nib 2 of the present embodiment has a smaller outer diameter than the nib 2 of the first embodiment, thereby being thinner than the nib 2 of the first embodiment. Handwriting width is obtained.
・インキ吸蔵体
前記インキ吸蔵体３は、円柱状の合成樹脂製繊維（例えば、ポリエステル繊維）の加工体よりなる。前記インキ吸蔵体３の外周面には、円筒状の外皮が被覆されている。前記外皮は、合成樹脂製フィルム（例えば、ポリエチレンテレフタレート製フィルム）よりなる。前記インキ吸蔵体３の前端面の軸心にペン先２の後端が突き刺し挿入され、前記ペン先２の後端が前記インキ吸蔵体３の内部に位置される。
Ink occlusion body The ink occlusion body 3 is made of a processed body of cylindrical synthetic resin fibers (for example, polyester fibers). The outer peripheral surface of the ink occlusion body 3 is covered with a cylindrical outer skin. The outer skin is made of a synthetic resin film (for example, a polyethylene terephthalate film). The rear end of the pen tip 2 is inserted into the axial center of the front end surface of the ink storage member 3 and the rear end of the pen tip 2 is positioned inside the ink storage member 3.
・軸筒
前記軸筒４は、前軸５と、該前軸５の後端開口部に着脱自在に螺着される後軸６とからなり、前軸５及び後軸６は、両者共に、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形により得られる筒状体である。前記前軸５は、ペン先２の外周面を保持する先細部５１と、該先細部５１より後方に連設され、インキ吸蔵体３と隔壁８とインキタンク１２前部とが収容される本体部５２とからなる。前記後軸６は、前端が開口され且つ後端が閉鎖された有底筒状体であり、前記後軸６の前端開口部が前記前軸５の後端開口部に螺着されると、前記後軸６内部にインキタンク１２の後部が収容される。
The shaft cylinder 4 includes a front shaft 5 and a rear shaft 6 that is detachably screwed into a rear end opening of the front shaft 5. The front shaft 5 and the rear shaft 6 are both It is a cylindrical body obtained by injection molding of synthetic resin (for example, polypropylene, polyethylene, etc.). The front shaft 5 is provided with a tip 51 for holding the outer peripheral surface of the nib 2 and a main body that is connected to the rear of the tip 51 and accommodates the ink occlusion body 3, the partition wall 8, and the front portion of the ink tank 12. Part 52. The rear shaft 6 is a bottomed cylindrical body having a front end opened and a rear end closed, and when the front end opening of the rear shaft 6 is screwed to the rear end opening of the front shaft 5, A rear portion of the ink tank 12 is accommodated in the rear shaft 6.
前記前軸５の内面（即ち先細部５１の内面から本体部５２の前部内面まで）には、前後方向に延びる複数本のリブ５３が一体に形成される。前記リブ５３には、前記前軸５の先細部５１と本体部５２との接続部の近傍において、段形状の規制壁部５３ａが形成される。前記規制壁部５３ａにインキ吸蔵体３の前端面が軸方向に当接し、前記本体部５２の前部内面のリブ５３にインキ吸蔵体３の外周面が径方向に圧接保持される。前記先細部５１内面のリブ５３により、ペン先２の外周面が径方向に圧接保持される。前記リブ５３の、前記ペン先２の外周面を保持する箇所と、前記インキ吸蔵体３の外周面を保持する箇所との間に、筒状壁部５３ｂが一体に形成される。
A plurality of ribs 53 extending in the front-rear direction are integrally formed on the inner surface of the front shaft 5 (that is, from the inner surface of the tapered portion 51 to the inner surface of the front portion of the main body 52). In the rib 53, a step-shaped regulating wall portion 53 a is formed in the vicinity of the connecting portion between the tip 51 of the front shaft 5 and the main body portion 52. The front end surface of the ink occlusion body 3 abuts against the restriction wall portion 53a in the axial direction, and the outer peripheral surface of the ink occlusion body 3 is pressed and held in the radial direction by the rib 53 on the inner surface of the front portion of the main body portion 52. The outer peripheral surface of the nib 2 is pressed and held in the radial direction by the rib 53 on the inner surface of the tapered portion 51. A cylindrical wall portion 53b is integrally formed between a portion of the rib 53 that holds the outer peripheral surface of the nib 2 and a portion that holds the outer peripheral surface of the ink occlusion body 3.
前記リブ５３により、インキ吸蔵体３の外周面と本体部５２の内面との間、インキ吸蔵体３の前端面と前軸５の内面との間、及びペン先２の外周面と先細部５１の内面との間に、空気通路が形成される。前記空気通路の前側は、前軸５の前端より外部に開口されるとともに、前記空気通路の後側は、インキ吸蔵体３の後端面と連通される。即ち、前記空気通路により、インキ吸蔵体３の前端面及びインキ吸蔵体３の後端面が、外気と連通される。
By the rib 53, between the outer peripheral surface of the ink storage body 3 and the inner surface of the main body 52, between the front end surface of the ink storage body 3 and the inner surface of the front shaft 5, and the outer peripheral surface and the tip 51 of the pen tip 2. An air passage is formed between the inner surface and the inner surface. The front side of the air passage is opened to the outside from the front end of the front shaft 5, and the rear side of the air passage is communicated with the rear end surface of the ink storage member 3. That is, the air passage allows the front end surface of the ink storage body 3 and the rear end surface of the ink storage body 3 to communicate with the outside air.
前記第２の実施の形態の軸筒４と、前記第１の実施の形態の軸筒４とは、軸方向の全長及び外径が異なる。具体的には、前記第２の実施の形態に用いる軸筒４は、前記第１の実施の形態に用いる軸筒４に比べ、軸方向の全長が長く且つ全体の外径が小さく設定される。
The shaft cylinder 4 of the second embodiment and the shaft cylinder 4 of the first embodiment are different in the overall length and the outer diameter in the axial direction. Specifically, the axial cylinder 4 used in the second embodiment is set to have a longer overall axial length and a smaller outer diameter compared to the axial cylinder 4 used in the first embodiment. .
・中間部材
前記中間部材７は、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形より得られる。前記中間部材７は、インキ吸蔵体収容部とインキタンク１２とを区画する隔壁８と、前記隔壁８の前面より前方に突出され且つインキ吸蔵体３の内部に突き刺し接続される複数本（具体的には２本）の連通管９と、前記隔壁８の後面より後方に突出され且つインキタンク１２の前端開口部に挿着される接続管１０と、前記隔壁８の前面より前方に突出され且つ軸筒４の内面（本体部５２の内面）に固着される取付筒部１１とを備える。軸筒４及び隔壁８によって形成される空間（即ち吸蔵体収容部）に、インキ吸蔵体３が収容される。前記取付筒部１１は各々の連通管９の基部外周及びリブ８１を包囲している。前記接続管１０には栓体１３の片側を押圧するための突片１０ａが一体に形成される。前記隔壁８は円板状であり、前記連通管９の各々、前記接続管１０、及び前記取付筒部１１は、円筒状である。
Intermediate member The intermediate member 7 is obtained by injection molding of a synthetic resin (for example, polypropylene, polyethylene, etc.). The intermediate member 7 includes a partition wall 8 that divides the ink storage body accommodating portion and the ink tank 12, and a plurality of intermediate members that protrude forward from the front surface of the partition wall 8 and are pierced and connected to the inside of the ink storage body 3 (specifically 2) communicating pipes 9, a connecting pipe 10 projecting rearward from the rear surface of the partition wall 8 and inserted into the front end opening of the ink tank 12, and projecting forward from the front surface of the partition wall 8; And an attachment cylinder portion 11 fixed to the inner surface of the shaft tube 4 (the inner surface of the main body portion 52). The ink occlusion body 3 is accommodated in a space formed by the shaft cylinder 4 and the partition wall 8 (that is, the occlusion body accommodation portion). The mounting cylinder portion 11 surrounds the outer periphery of the base portion and the rib 81 of each communication pipe 9. The connecting pipe 10 is integrally formed with a protruding piece 10a for pressing one side of the plug 13. The partition wall 8 has a disk shape, and each of the communication pipes 9, the connection pipe 10, and the attachment cylinder part 11 have a cylindrical shape.
前記中間部材７において、隔壁８、連通管９、接続管１０、及び取付筒部１１は一体に連設される（即ち一体に形成される）。即ち、前記中間部材７により、隔壁８、連通管９、接続管１０、及び取付筒部１１を１部品で構成できる。
In the intermediate member 7, the partition wall 8, the communication pipe 9, the connection pipe 10, and the mounting cylinder portion 11 are integrally connected (that is, formed integrally). That is, the intermediate member 7 makes it possible to configure the partition wall 8, the communication tube 9, the connection tube 10, and the mounting cylinder portion 11 with one component.
・連通管
前記連通管９の各々の内部には、軸方向に流通路９３が設けられ、前記流通路９３が、前記連通管９の各々の両端にて開口される。前記連通管９の各々の前端は、インキ吸蔵体３の内部に開口され、前記連通管９の各々の後端は、隔壁８の後端より後方へインキタンク１２内に開口される。前記各々の連通管９は、インキ吸蔵体３とインキタンク１２との間に並列に配置されるため、インキ吸蔵体３と、その後方のインキタンク１２との間に、独立した複数本の流通路９３が並列に設けられる。前記連通管９の各々の流通路９３は、接続管１０内に位置する隔壁８の、軸心より離れた箇所に貫通される。前記連通管９の外径及び前記連通管９の内径（流通路９３内径）は、前方に向かうに従い小さくなるよう設定される。
-Communication pipe The flow path 93 is provided in the inside of each of the communication pipes 9 in the axial direction, and the flow path 93 is opened at both ends of each of the communication pipes 9. A front end of each of the communication pipes 9 is opened in the ink storage body 3, and a rear end of each of the communication pipes 9 is opened in the ink tank 12 behind the rear end of the partition wall 8. Since each of the communication pipes 9 is arranged in parallel between the ink occluding body 3 and the ink tank 12, a plurality of independent circulations are provided between the ink occluding body 3 and the ink tank 12 behind the ink occluding body 3. A path 93 is provided in parallel. Each of the flow passages 93 of the communication pipe 9 is penetrated to a part of the partition wall 8 located in the connection pipe 10 away from the axis. The outer diameter of the communication pipe 9 and the inner diameter of the communication pipe 9 (inner diameter of the flow passage 93) are set so as to decrease toward the front.
前記連通管９の各々の前端は、インキ吸蔵体３の後端から前方に突き刺し挿入され、最後はインキ吸蔵体３の内部のペン先２後端近傍に位置される。前記連通管９の各々の前端がインキ吸蔵体３に突き刺し挿入される際、連通管９の各々の前端がインキ吸蔵体３の繊維を前方に押圧圧縮する。それにより、各々の連通管９の前端近傍（即ち、ペン先２後端近傍）のインキ吸蔵体３の繊維密度が、連通管９の各々の前端近傍以外の部分のインキ吸蔵体３の繊維密度よりも高く設定される。
The front end of each of the communication pipes 9 is inserted by being stabbed forward from the rear end of the ink storage body 3, and finally located near the rear end of the pen tip 2 inside the ink storage body 3. When the front ends of the communication pipes 9 are inserted into the ink storage body 3, the front ends of the communication pipes 9 press and compress the fibers of the ink storage body 3 forward. Thereby, the fiber density of the ink occlusion body 3 in the vicinity of the front end of each communication pipe 9 (that is, in the vicinity of the rear end of the pen nib 2) is the fiber density of the ink occlusion body 3 in a portion other than the vicinity of each front end of the communication pipe 9. Is set higher.
前記連通管９の各々の前端は、ペン先２の後端と直接接続されず、ペン先２と非接触状態にあり、インキ吸蔵体３の内部を介してインキ流通可能に接続される。また、前記連通管９の各々の前端は、ペン先２の後端より僅かに後方に位置している。
The front end of each of the communication pipes 9 is not directly connected to the rear end of the pen nib 2 but is in a non-contact state with the pen nib 2 and is connected through the ink occlusion body 3 so that ink can be circulated. Further, the front end of each of the communication pipes 9 is located slightly behind the rear end of the pen tip 2.
・リブ
前記隔壁８の前面には、前後方向に延びる板状のリブ８１が一体に形成される。前記リブ８１がインキ吸蔵体３の後端面と当接される。前記リブ８１により、前記隔壁８と前記インキ吸蔵体３の後端面との間には、外気と連通する隙間が形成される。前記隙間は、前記空気通路を介して、外気と連通される。前記リブ８１は、横断面放射状（ここでは十字状）に形成される。前記リブ８１の一部は各々の連通管９の基部の間に形成され、各々の連通管９の基部側壁が連結される。それにより、各々の連通管９の屈曲強度が向上し、各々の連通管９の隔壁８に対する折れ曲がりを抑えることができる。
Ribs A plate-like rib 81 extending in the front-rear direction is integrally formed on the front surface of the partition wall 8. The rib 81 is brought into contact with the rear end surface of the ink storage member 3. A gap communicating with the outside air is formed by the rib 81 between the partition wall 8 and the rear end surface of the ink storage body 3. The gap communicates with the outside air through the air passage. The ribs 81 are formed in a radial cross section (here, a cross shape). A part of the rib 81 is formed between the base portions of the communication pipes 9 and the base side walls of the communication pipes 9 are connected. Thereby, the bending strength of each communicating pipe 9 is improved, and the bending of each communicating pipe 9 with respect to the partition wall 8 can be suppressed.
本実施の形態において、前記連通管９は、その各々が、インキタンク１２内のインキ１４をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク１２内に供給する機能とを備える。インキタンク１２内のインキ１４をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク１２内のインキ１４が、少なくとも一つの連通管９を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管９を通ってインキタンク１２内に取り込まれる。
In the present embodiment, each of the communication pipes 9 has a function of supplying the ink 14 in the ink tank 12 into the ink storage body 3 and a function of supplying outside air into the ink tank 12. When supplying the ink 14 in the ink tank 12 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 14 in the ink tank 12 passes through at least one communication pipe 9 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, outside air is taken into the ink tank 12 through the other communication pipe 9.
前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管９の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク１２内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管９によるインキタンク１２からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管９の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク１２からのインキ流出とインキタンク１２への空気流入（即ちインキと空気の交替）が停止状態となる。
When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication tube 9 that has taken in the outside air is in a liquid-sealed state with the impregnating ink, and is temporarily closed. The supply of outside air into the tank 12 is stopped. At the same time, the supply of ink from the ink tank 12 to the ink occlusion body 3 by the communication pipe 9 that has been supplying the ink is also stopped. As a result, each front end opening of the communication pipe 9 is in a liquid-sealed state temporarily. The ink tank 12 is closed, and ink outflow from the ink tank 12 and air inflow into the ink tank 12 (that is, replacement of ink and air) are stopped.
前記連通管９の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管９の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク１２からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。
Since the front end of each of the communication pipes 9 is positioned inside the ink storage body 3, all the front end openings of each of the communication pipes 9 are covered with an ink liquid seal impregnated inside the ink storage body 3. Can be easily closed. As a result, excess ink is not supplied from the ink tank 12 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.
また、本実施の形態では、前記連通管９を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管９がインキ供給を行う場合、他の連通管９が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。
In this embodiment, by providing a plurality of communication pipes 9 (that is, two or more), when at least one communication pipe 9 supplies ink, the other communication pipe 9 supplies air. become. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.
また、本実施の形態では、インキ吸蔵体３の後端面と隔壁８前面との間に、外気と通気可能な隙間を形成したことにより、インキ吸蔵体３の内部の空気を、インキ吸蔵体３の後端面から外部に逃がすことができる。それにより、温度上昇等によるインキタンク１２内の圧力上昇時、インキタンク１２内から押し出されたインキが、スムーズに連通管９の前端よりインキ吸蔵体３の連通管９の前端近傍を介して後方へ移動し、インキ吸蔵体３の後方に含浸され、インキの外部への漏出を防ぎ、一方、温度低下等によるインキタンク１２内の圧力減少時、インキ吸蔵体３の後方の含浸インキを、インキ吸蔵体３内部の連通管９の前端近傍を介して連通管９の前端開口部より連通管９内を通してインキタンク１２内に戻すことができる。特に、リブ８１により、インキ吸蔵体３の後方移動が規制されるとともに、インキ吸蔵体３の後端面と隔壁８の前面との間に、前記隙間を確実に形成することができる。
Further, in the present embodiment, a gap that allows air and air to pass between the rear end surface of the ink storage body 3 and the front surface of the partition wall 8 is formed, so that the air inside the ink storage body 3 is changed to the ink storage body 3. It can escape from the rear end face to the outside. Thereby, when the pressure in the ink tank 12 rises due to a temperature rise or the like, the ink pushed out from the ink tank 12 smoothly passes from the front end of the communication pipe 9 to the rear through the vicinity of the front end of the communication pipe 9 of the ink storage body 3. The ink is impregnated behind the ink occlusion body 3 to prevent leakage of the ink to the outside. On the other hand, when the pressure in the ink tank 12 is reduced due to a temperature drop or the like, It can be returned to the ink tank 12 through the communication pipe 9 from the front end opening of the communication pipe 9 through the vicinity of the front end of the communication pipe 9 inside the occlusion body 3. In particular, the rib 81 restricts the backward movement of the ink occlusion body 3 and can reliably form the gap between the rear end surface of the ink occlusion body 3 and the front surface of the partition wall 8.
・凹曲面
前記各々の連通管９の基部外面と隔壁８前面との接続隅部には、縦断面アール状の凹曲面９１（肉盛部）が環状に一体に形成される。前記凹曲面９１により、連通管９の基部（接続隅部）の外径が、後方に向かうに従い次第に大きくなるよう設定される。また、前記各々の連通管９の側壁外面とリブ８１前端との接続隅部には、縦断面アール状の凹曲面９２（肉盛部）が一体に形成される。前記凹曲面９２により、連通管９側壁外面とリブ８１前端との接続隅部の外径が、後方に向かうに従い次第に大きくなるよう設定される。前記凹曲面９１及び前記凹曲面９２の曲率半径は、０．５ｍｍ（ミリメートル）以上に設定され、それにより、接続隅部におけるクラックや折損を十分に防止できる。また、前記凹曲面９２の曲率半径は、３ｍｍ（ミリメートル）以下に設定され、それにより、リブ８１前端がインキ吸蔵体３の後端面に安定して当接できる。
Concave surface A concave curved surface 91 (building-up portion) having a round cross section is integrally formed in an annular shape at the connecting corner between the outer surface of the base portion of each communication pipe 9 and the front surface of the partition wall 8. Due to the concave curved surface 91, the outer diameter of the base portion (connection corner portion) of the communication pipe 9 is set to gradually increase toward the rear. In addition, a concave curved surface 92 (built-up portion) having a rounded cross section is integrally formed at a connection corner portion between the outer surface of the side wall of each communication pipe 9 and the front end of the rib 81. Due to the concave curved surface 92, the outer diameter of the connection corner between the outer surface of the side wall of the communication pipe 9 and the front end of the rib 81 is set to gradually increase toward the rear. The curvature radii of the concave curved surface 91 and the concave curved surface 92 are set to 0.5 mm (millimeters) or more, thereby sufficiently preventing cracks and breakage at the connection corners. Further, the radius of curvature of the concave curved surface 92 is set to 3 mm (millimeters) or less, so that the front end of the rib 81 can stably come into contact with the rear end surface of the ink storage body 3.
・インキタンク
前記インキタンク１２は、前端が開口し且つ後端が閉鎖された有底筒状体であり、合成樹脂の射出成形またはブロー成形により得られる。前記インキタンク１２内には、直にインキ１４が貯溜される。前記インキタンク１２内に貯溜されるインキ１４は、筆記具用インキ（例えば、水性インキ、油性インキ）または塗布液（例えば、化粧液、修正液、接着剤、塗料、液体医薬品等）のいずれであってもよい。
Ink tank The ink tank 12 is a bottomed cylindrical body having a front end opened and a rear end closed, and is obtained by injection molding or blow molding of a synthetic resin. Ink 14 is stored directly in the ink tank 12. The ink 14 stored in the ink tank 12 is either a writing instrument ink (for example, water-based ink, oil-based ink) or a coating liquid (for example, cosmetic liquid, correction liquid, adhesive, paint, liquid medicine, etc.). May be.
前記インキタンク１２の前端開口部内面は、中間部材７の接続管１０外面が着脱自在に嵌着される。前記インキタンク１２のインキが消費され筆記不能となった場合、前記インキタンク１２を接続管１０から取り外し、内部にインキが充填された新たなインキタンク１２の前端開口部に接続管１０を挿着する。それにより、再び、筆記可能となる。前記新たなインキタンク１２の前端開口部は、栓体１３により閉鎖されている。接続管１０をインキタンク１２の前端開口部に挿着した際、前記栓体１３が接続管１０の突片１０ａにより後方に押圧され、それにより、栓体１３が外され、インキタンク１２の前端開口部が開栓される。
The inner surface of the front end opening of the ink tank 12 is detachably fitted to the outer surface of the connecting pipe 10 of the intermediate member 7. When ink in the ink tank 12 is consumed and writing becomes impossible, the ink tank 12 is removed from the connection pipe 10 and the connection pipe 10 is inserted into the front end opening of a new ink tank 12 filled with ink. To do. Thereby, writing becomes possible again. A front end opening of the new ink tank 12 is closed by a stopper 13. When the connecting pipe 10 is inserted into the front end opening of the ink tank 12, the plug body 13 is pushed backward by the protruding piece 10 a of the connecting pipe 10, whereby the plug body 13 is removed and the front end of the ink tank 12 is removed. The opening is opened.
