JP2005219482A - Capping-type writing utensil and method for manufacturing molded product composed of ink absorber and sealer used for capping-type writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capping-type writing utensil of such a construction that an excess ink generated by ink dripping is absorbed to clean the apex of a ball-point pen tip, and a method for manufacturing a molded product composed of an ink absorber/a sealer used for this writing utensil. <P>SOLUTION: In the capping-type writing utensil, a sealer 10 with an elastic restoring force and an ink absorber 11, likewise with an elastic restoring force, which is retained by the sealer 10, are arranged in a capping member 7. This capping member 7 is fitted to a ball-point pen main body. Consequently, the excess ink sticking to the apex of a ball-point pen tip 5 by an ink dripping phenomenon, is absorbed and cleaned by the ink absorber 11. Further, the apex of the ball-point pen tip 5 is surrounded by the sealer 10 passing through the nearly center part of the ink absorber 11 and thus the ink is prevented from being dried due to the volatilization of an ink solvent. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cap-type writing instrument provided with an ink absorber in a cap member that can absorb a so-called ink bottling accumulated at the tip of the ball-point pen tip and clean the tip of the ball-point pen tip. The present invention relates to a manufacturing method for manufacturing a molded body including an absorbent body and a seal body.

For example, water-based ballpoint pens have a problem that ink solvents in the vicinity of the ballpoint pen tip are volatilized and dried by being left for a long period of time, making writing at the start of use impossible. Further, for example, when the pen tip is stored in a downward state or when an impact is applied in the axial direction, there is a problem that ink is ejected from the ballpoint pen tip. Therefore, in order to prevent the occurrence of such a problem, a writing instrument having a configuration in which a non-water-absorbing seal body made of an elastic body is arranged in a cap member that covers the ballpoint pen tip has been proposed (see, for example, Patent Document 1). .
Japanese Utility Model Publication No.59-97085

  According to the writing instrument having the configuration disclosed in Patent Document 1 described above, when the cap member is attached to the writing instrument body, the sealing body made of an elastic body arranged in the cap member is deformed by the contact of the ballpoint pen tip. The seal body surrounds the ballpoint pen tip so as to be buried. Accordingly, drying due to volatilization of the ink solvent in the vicinity of the ballpoint pen tip can be effectively prevented, and occurrence of inconvenience that ink is discharged from the ballpoint pen tip upon receiving an impact or the like can be avoided.

  By the way, in this kind of ball-point pen, it has been conventionally known that a phenomenon called ink fringe occurs. This ink bottling is a phenomenon in which excess ink that cannot be transferred onto the writing surface or the like is scraped off by the end portion (crimping portion) of the holder that supports the ball of the writing tip and accumulates on the outer periphery of the holder tip. If this ink spill occurs, it becomes a factor that contaminates the writing surface. Further, it often happens that secondary contamination is further generated in the rubbing mark by unintentionally rubbing the writing surface contaminated by the ink botting with a fingertip or the like.

  In the cap-type writing instrument in which the seal member is disposed in the cap member as shown in Patent Document 1 described above, when the cap member is mounted in a state where the ink void is generated, excessive ink due to the ink void is generated. A problem arises in that contamination adheres to the sealing body and spreads contamination. If the sealing body is contaminated with excessive ink in this way, there is almost no ability to absorb ink as a function of the sealing body, so that the ballpoint pen tip is always in a dirty state and gives a poor image. Will occur. Furthermore, since excess ink always adheres to the ball-point pen tip, there is a problem that the writing surface is contaminated with excess ink at the start of writing.

  Therefore, the present invention has been made paying attention to the above-mentioned problems, and even if ink spilling occurs as described above, it is possible to absorb the excess ink and clean the tip of the pen tip. The first problem to be solved is to provide a cap-type writing instrument that can reduce contamination of the writing surface as much as possible.

  The present invention is also intended to provide a manufacturing method for manufacturing a molded body using an ink absorber and a seal body used in the cap-type writing instrument described above, and in particular, the functions of the ink absorber and the seal body are sufficient. It is a second solution to provide a method for producing a molded body that can be exhibited in a simple manner.

  The cap-type writing instrument according to the present invention, which has been made to solve the first problem, as described in claim 1, is separate from the writing instrument body having a ballpoint pen tip at the tip and the writing instrument body. A cap-type writing instrument that is configured and configured to be detachable from the writing instrument main body and that can cover the ball-point pen tip when the writing instrument is mounted. It is characterized in that an ink absorber capable of absorbing excess ink by an ink bottling attached to the ball-point pen tip at the time of mounting on the ink cartridge is disposed.

  In this case, in one preferred embodiment, as described in claim 2, the ink absorber is configured such that the tip end portion thereof can penetrate the ink absorber by the contact of the ball-point pen tip. In another preferred embodiment, as described in claim 3, the ink absorber is formed with a penetrating portion through which the tip of the ball-point pen tip can pass.

  In addition, as described in claim 4, the ink absorber is preferably made of a porous material or a fiber bundle core. And in the preferable form of the cap-type writing instrument concerning this invention, the seal body which can cover the front-end | tip part of a ball-point pen tip is arrange | positioned in the back of the ink absorber in a cap member as described in Claim 5. It is supposed to be configured.

  In this case, it is desirable that the ink absorber and the seal body be joined to each other by melting a hot melt interposed therebetween as described in claim 6. As described in Item 7, it is preferable to use a hot melt having a structure in which the material is flattened and formed in a mesh shape.

  On the other hand, a manufacturing method for manufacturing a molded body of an ink absorber and a seal body according to the present invention, which has been made to solve the second problem described above, constitutes an ink absorber as described in claim 8. Between the material and the material constituting the seal body, a hot melt formed in a flat shape is interposed and thermocompression bonded, and the hot melt is melted to form a multilayer polymer, A step of obtaining the molded body by punching out the polymer having a multilayer structure with a predetermined area from a direction perpendicular to the surface of the polymer.

  In this case, as described in claim 9, it is desirable to obtain a plurality of molded bodies by simultaneously punching out the multi-layer polymer with a predetermined area at positions that do not overlap each other.

  According to the cap-type writing instrument according to claim 1, since the ink absorber that can absorb the excess ink from the ink stick attached to the ballpoint pen tip is disposed in the cap member, the ink spot is located near the ballpoint pen tip. Even if it occurs, by attaching a cap member to the writing instrument body, excess ink adhering to the ballpoint pen tip can be effectively absorbed by the ink absorber and cleaned. Therefore, it is possible to always prevent the ballpoint pen tip from being contaminated by excess ink, and it is possible to effectively reduce the contamination of the writing surface.

  According to a second aspect of the present invention, the ink absorber disposed in the cap member is configured such that the tip end portion thereof can penetrate the ink absorber by the contact of the ballpoint pen tip. Thus, for example, in the case where a seal body capable of covering the tip end portion of the ballpoint pen tip is disposed further behind the ink absorber as described in claim 5, the tip end portion of the ballpoint pen tip is placed by the seal body. The function of covering and preventing the ink from drying in the ballpoint pen tip portion can be effectively exhibited.

  Furthermore, as described in claim 3, by forming a penetrating part through which the tip of the ball-point pen tip can pass through the ink absorber, the position where the ball-point pen tip passes through the ink absorber is always constant. And variation in ink wiping efficiency due to the ink absorber can be suppressed. In the same manner as described above, when a seal body that can cover the tip of the ball-point pen tip is disposed further behind the ink absorber, similarly, the ink is prevented from drying in the ball-point pen tip portion by the seal body. Function can be effectively exhibited.

  Further, as described in claim 4, by configuring the ink absorber with a porous material or a fiber bundle core, it is possible to improve the absorption efficiency of excess ink in the ball-point pen tip portion, and to stabilize the ball-point tip portion. A cleaning effect can be exhibited.

  Furthermore, as described in claim 5, by adopting a configuration in which a seal body that can cover the tip of the ball-point pen tip is arranged in the back of the ink absorber in the cap member, water-based ink can be used. The used ballpoint pen effectively wipes off excess ink by the ink absorber and effectively prevents the ink from drying off at the ballpoint pen tip, eliminating the problem of making writing impossible when the ballpoint pen is used. Can be made.

  On the other hand, the cap member is removed from the ball-point pen body by combining the ink absorber and the seal body with each other by melting the hot melt interposed between the ink absorber and the seal body. In this case, it is possible to solve the problem that the ink absorber disposed in the cap member comes off from the seal body and falls off.

  Further, as described in claim 7, when the cap member is attached to the ballpoint pen body by using a material having a flat and particularly mesh shape as the hotmelt, the ballpoint pen tip is made of hotmelt. The layer can be easily penetrated, and the function of preventing the ink of the ball-point pen tip portion from being dried by the seal body can be effectively exhibited.

  In the case where the manufacturing method described in claim 8 is adopted, each of the materials constituting the ink absorber and the sealing body is first subjected to thermocompression bonding by hot melt, and then punched out with a predetermined area, thereby forming the molding. Therefore, it is possible to obtain a molded body that is always uniform with no deviation between the ink absorber and the sealing body.

  In addition to this, when the manufacturing method described in claim 9 is adopted, a large number of molded bodies can be obtained at the same time in one punching step, which can contribute to improving the manufacturing efficiency.

  Hereinafter, a cap-type writing instrument according to the present invention will be described based on an embodiment shown in the drawings. First, FIGS. 1-5 shows 1st Embodiment of the writing instrument concerning this invention. As shown in part in the cross-sectional view of FIG. 1, the shaft cylinder that forms the outline of the writing instrument (ballpoint pen) main body 1 is composed of a synthetic resin front shaft 2 and the front shaft 2 behind the front shaft 2. The rear shaft 3 is made of synthetic resin and is detachably attached.

  A metal base 4 is attached to the tip of the front shaft 2 by being fitted on the inner surface of the front shaft 2. Although not shown in the drawing, screw portions are formed on the inner peripheral surface of the rear end portion of the front shaft 2 and the outer peripheral surface of the front end portion of the rear shaft 3, respectively. By doing so, the rear shaft 3 is detachably attached to the front shaft 2.

  The ball-point pen main body 1 having the above-described configuration can accommodate the refill including the ball-point pen tip 5 and an ink storage tube (not shown) in the shaft tube by removing the rear shaft 3 from the front shaft 2. In this state, the tip of the ball-point pen tip 5 is projected from the opening formed at the tip of the base 4 by screwing the rear shaft 3 with the front shaft 2 using the screw. Can be assembled.

  As shown in FIG. 1, an annular step 2 a is formed slightly near the tip of the tip shaft 2, and the tip of the tip shaft 2 is slightly reduced in diameter. And it is comprised so that the cap member 7 comprised separately from the ball-point pen main body 1 may be attached to this reduced diameter part so that attachment or detachment is possible. By attaching the cap member 7 to the ballpoint pen main body 1, as will be described later, surplus ink due to the ink stick attached to the ballpoint pen tip 5 is absorbed by the ink absorber, and the ballpoint pen tip 5 is disposed at the back of the ink absorber. The ink is covered with the sealed body so as to prevent the ink from drying.

  FIG. 2 is an enlarged view of the cap member 7 described above, and FIG. 3 is an enlarged view of the main part thereof. As shown in FIG. 2, the cap member 7 is formed of a synthetic resin in a substantially cylindrical shape, and a closing member 8 formed of the same synthetic resin is attached to the tip end side. Moreover, the rear end side is made into the cap opening part 7a, and it is comprised so that the ball-point pen tip 5 in the above-mentioned ball-point pen main body 1 can be inserted. Further, a clip 9 is attached to the side wall on the tip end side of the cap member 7.

  The closing member 8 attached to the tip end side of the cap member 7 is formed into a bottomed cylindrical body as shown in an enlarged view in FIG. 3, and a step portion 8a formed on the outer peripheral surface thereof. 8b etc. are attached so that it may be fitted in the cylindrical part of the cap member 7 comprised by the cylindrical body shape. A plurality of ribs 8d are formed along the axial direction in the central space 8c formed in the closing member 8. Further, a step 8e is formed by changing the height of the rib 8d in the vicinity of the central portion in the longitudinal direction of the rib 8d, whereby the inner diameter formed by the ridge line portion of each rib 8d has a closing member. 8 is configured to be small on the back side.

  On the other hand, a sealing body 10 made of a material having elasticity and resilience is accommodated in the space 8c of the closing member 8, and the sealing body 10 is pushed to the position where the step 8e is formed. Thus, it is positioned in the closing member 8.

  FIG. 4 shows the structure of the seal body 10, and FIG. 4 (A) is a partial cross-sectional view of the seal body as viewed from the side, and FIG. The seal body in the state shown in FIG. 4A is shown as viewed from the bottom side. As shown in FIG. 4, the outer shape of the seal body 10 is substantially cylindrical, and the upper and lower surfaces of the seal body 10 are hollowed to form a space portion, whereby a thin wall is formed at the center portion. Part 10a is formed. A pair of right and left crescent-shaped overhang portions 10c are formed on the lower bottom portion of the seal body 10 so as to slightly surround the space portion 10b on the lower surface side from the lower side.

  The space 10b on the lower surface side formed in the seal body 10 is formed in a disk shape as shown in FIGS. 2 and 3, and accommodates an ink absorber 11 having elasticity and resilience. Yes. That is, the ink absorber 11 is held by the pair of overhang portions 10 c formed on the seal body 10, so that the ink absorber 11 is disposed on the cap opening portion 7 a side in the cap member 7. The seal body 10 is arranged.

  FIG. 5 shows the state of the ball-point pen chip 5 on the side of the ball-point pen body 1 and the ink absorber 11 and the seal body 10 arranged on the side of the cap member 7 in a state in which the cap member 7 having the above-described configuration is mounted on the ball-point pen body 1. It is a thing. As described above, the ink absorber 11 is formed in a disk shape from a material described later having elasticity and resilience, and the seal body 10 that holds the ink absorber 11 is also as described above. It is made of a material having elasticity and resilience.

  As shown in FIG. 5, in a state where the cap member 7 is mounted on the ballpoint pen body 1 side, the ink absorber 11 receives the contact of the ballpoint pen tip 5, and the ink absorber 11 is formed in a thin portion 10 a formed at the center of the seal body 10. The thin portion 10a is also deformed to the back side of the cap member 7 under the stress. At this time, as described above, when excess ink is deposited on the ball-point pen tip 5 by the ink botton, the excess ink adhering to the ball-point pen tip 5 is first absorbed by the ink absorber 11.

  In the state shown in FIG. 5 in which the cap member 7 is completely attached to the ballpoint pen main body 1 side, the ink absorber 11 is pushed out by the tip end portion of the ballpoint pen tip 5, and the tip end portion of the ballpoint pen tip 5 is the seal body 10. It is made to be covered with the thin part 10a formed in the above. As will be described later, the seal body 10 is made of a non-water-absorbing material. Therefore, the tip of the ball-point pen tip 5 is covered with the thin portion 10a of the seal body 10, thereby suppressing the volatilization of the ink solvent. Ink drying is prevented. Further, the seal body 10 can be stored, for example, with the pen tip facing downward, or can solve the problem of ink being ejected from the ball-point pen tip when an impact is applied in the axial direction.

  The ink absorber 11 described above needs to have a function of effectively absorbing, for example, water-based ink, and desirably has a certain degree of elastic resilience. Therefore, the ink absorber 11 is preferably composed of a porous material or a fiber bundle core (a state where fibers are entangled). When the ink absorber 11 is formed of a porous material, it is preferably molded as a continuous foam. Preferred materials used for this include, for example, polyethylene, NBR (acrylonitrile butadiene rubber), polyester, EPDM (ethylene propylene diene rubber), and IIR (butyl rubber). In the case where the ink absorber 11 is formed of a fiber bundle core, preferred materials used for this include, for example, polyester, polyethylene, and polypropylene.

  On the other hand, it is desirable that the sealing body 10 described above is made of a non-water-absorbing material, and it is desirable that the sealing body 10 has elastic resilience. Accordingly, examples of preferable materials for forming the seal body 10 include NBR, EPDM, IIR, thermoplastic elastomer, and urethane rubber.

  Next, FIG. 6 and FIG. 7 show a second embodiment of the cap-type writing instrument according to the present invention. In the second embodiment, the ball pen body 1 already described has the same configuration, and the description thereof is omitted. 6 and 7 showing the second embodiment show parts corresponding to FIGS. 3 and 5 which are the first embodiment already described, and the corresponding parts are shown. The same reference numerals are used, and detailed description thereof is omitted.

  In the second embodiment shown in FIGS. 6 and 7, the tip of the ball-point pen tip 5 can be passed through the center of the disc-shaped ink absorber 11 held by the seal body 10. A through-hole 11a is formed. The through portion 11a shown in FIG. 6 is configured as a through hole. However, this may be a configuration in which, for example, a cross-shaped cut is made in the center of the disk-shaped ink absorber 11.

  According to the configuration in which the penetrating portion 11a is formed in the ink absorber 11, the position through which the ball-point pen tip 5 passes in the ink absorber can always be set to be constant, and variation in ink wiping efficiency due to the ink absorber can be suppressed. Can do. In the state shown in FIG. 7 in which the cap member 7 is completely attached to the ballpoint pen body 1 side, the penetrating part 11a formed in the ink absorber 11 is expanded by the tip part of the ballpoint pen tip 5, and its tip The portion is surely covered by the thin-walled portion 10 a formed in the seal body 10. Thereby, the function which prevents the drying of the ink in the front-end | tip part of the ball-point pen tip 5 by the sealing body 10 can be exhibited effectively.

  The materials constituting the ink absorber 11 and the seal body 10 used in the second embodiment shown in FIGS. 6 and 7 are the same as those described in the first embodiment. it can.

  8 and 9 show a third embodiment of the cap-type writing instrument according to the present invention. In the third embodiment, the ball pen body 1 already described has the same configuration, and the description thereof is omitted. In the third embodiment, as shown in FIG. 8, a cup-shaped member 7b is integrally formed on the same axis in a cap member 7 formed in a cylindrical shape. The cup-shaped member 7b accommodates a seal body 10 formed in a ball shape, and an ink absorber 11 formed in a disk shape in front of it.

  In the embodiment shown in FIG. 8, the ink absorber 11 is accommodated in the inner diameter portion of the cup-shaped member 7b with its outer diameter slightly reduced, and the cup is recovered by the elastic restoring force of the ink absorber 11. It arrange | positions in the fixed position in the shaped member 7b. Therefore, in the case where the problem that the ink absorber 11 comes out of the cup-shaped member 7b occurs, an annular rib is formed on the inner diameter portion of the cup-shaped member 7b in front of the ink absorber 11, although not shown in the drawing. It is also possible to adopt a configuration in which these are arranged.

  On the other hand, as shown in FIG. 8, a cylindrical occlusion member 8 formed integrally with the clip 9 is fitted on the distal end side of the cap member 7 formed in a cylindrical shape, and the inner diameter surface of the occlusion member 8 is fitted. However, the front end side of the cap member 7 is closed by fitting to the outer surface of the cup-shaped member 7b.

  FIG. 9 shows the configuration of the ink absorber 11 used in the third embodiment. FIG. 9A is a longitudinal sectional view of the ink absorber cut at the center. In addition, FIG. 9B shows this as viewed from above. As shown in FIG. 9, a penetrating portion 11 a through which the tip of the ball-point pen tip 5 can pass is formed in the central portion of the ink absorber 11 formed in a disk shape. The through portion 11a shown in FIG. 9 is formed as a through hole, but has a configuration in which, for example, a cross-shaped notch is provided in the central portion of the disk-shaped ink absorber 11 as in the example already described. There may be.

  According to the ink absorber 11 shown in FIG. 9, it is possible to obtain the same effects as those of the ink absorber 11 shown in FIG. And the front-end | tip part of the ball-point pen tip 5 contact | abutted to the seal body 10 through the penetration part 11a is enclosed by deform | transforming the seal body 10 formed in the ball shape. Thereby, volatilization of the ink solvent in the vicinity of the ballpoint pen tip can be effectively prevented, and the same operational effects as those of the first and second embodiments already described can be obtained. Also, in the ink absorber 11 and the seal body 10 used in the third embodiment shown in FIGS. 8 and 9, the same materials as those described in the first embodiment are used. it can.

  In each of the first to third embodiments described above, the ink absorber 11 is accommodated in the cap member 7 and the seal body 10 is further disposed in the interior thereof. This is to obtain the effect of reducing volatilization of the ink solvent by arranging the seal body 10 in combination with a ballpoint pen using water-based ink, for example. However, in the case where a ball-point pen using oil-based ink, for example, where the volatilization of the ink solvent is small, the above-described seal body 10 is not necessarily provided, and the present invention is effective even in a configuration in which the seal body 10 does not exist. Can be used.

  Next, FIG. 10 to FIG. 12 explain the structure of the molded body by the ink absorber and the seal body used in the cap type writing instrument according to the present invention and the manufacturing method thereof. In order to form a molded body composed of the ink absorber and the seal body, as shown in a sectional view in FIG. 10, the strip-shaped material 11A constituting the ink absorber and the strip-shaped material constituting the seal body. 10A is prepared, and a hot melt 12 formed in a flat shape is interposed between the material 11A of the ink absorber and the material 10A of the seal body.

  As the material 11A constituting the ink absorber, the same material used when the ink absorber 11 already described with reference to FIG. 3 or the like is formed as a continuous foam can be used. For example, the aforementioned NBR is used. Further, as the material 10A constituting the seal body, the same material used in the case of molding the seal body 10 already described based on FIGS. 3 and 4 can be used. The IIR described above is used.

  On the other hand, in this embodiment, as the hot melt 12, one formed in a mesh shape (or a fiber shape) can be suitably used. In other words, the hot melt material is formed in a mesh shape, so that a relatively fine through hole is formed over the entire surface. As an example, the product name “DYNAC Sheet” manufactured by Kureha Tech Co., Ltd. is used. Can be used.

  FIG. 11 shows a state in which hot-melt 12 is interposed between the material 11A constituting the ink absorber and the material 10A constituting the seal body, as viewed in the arrow direction from the top view and the line AA. It is shown by a sectional view. In addition, the white arrow shown in FIG. 11 schematically shows a portion to be thermocompression bonded by a heater block (not shown). In particular, in the material 10A constituting the sealing body located on the upper surface side, 11 is subjected to thermocompression bonding by a heater block (not shown) except for the position of a circled region 10d in the plan view.

  As a result, as shown in the cross-sectional view of FIG. 11, the thermocompression bonding surface by the heater block in the material 10A constituting the sealing body is in a recessed state. The hot melt 12 sandwiched between the materials 10A and 11A is temporarily melted by the upper and lower heater blocks (not shown), and the materials 10A and 11A are temporarily melted by releasing the thermocompression action. And a three-layer polymer bonded to each other by hot melt 12.

  FIG. 12 schematically shows a process of obtaining a molded body 13 by the ink absorber 11 and the seal body 10 from the polymer constituted by the above-described thermocompression bonding process. Similarly, it is shown in a sectional view. In this case, as shown in FIG. 12, the die 14 for punching schematically shown from the vertical direction perpendicular to the upper surface is lowered from the upper surface of the polymer to punch out a part of the polymer, thereby forming the polymer. The body 13 can be obtained.

  The punching die 14 is configured to punch out the polymer with an area of a region 10d surrounded by a circle shown in FIG. 11, whereby a heater block (not shown) is used in the thermocompression bonding step. A molded body 13 shown in FIG. 12 can be obtained in the constituent parts of the seal body that are not subjected to compression.

  The molded body 13 formed of the ink absorber 11 and the seal body 10 formed as described above can be used in place of the combination of the ink absorber 11 and the seal body 10 shown in FIGS. 2 and 3, for example. . According to the molded body 13 formed by the manufacturing process shown in FIGS. 10 to 12, the ink absorber 11 and the seal body 10 are bonded by the hot melt 12. When the cap member 7 is removed, the problem that the ink absorber 11 is detached from the seal body 10 and falls off can be prevented.

  On the other hand, when the cap member 7 is attached to the ballpoint pen body 1 by using a hot melt formed in a mesh shape for joining the ink absorber 11 and the seal body 10, the ballpoint tip is a layer of the hotmelt 12. Thus, the cleaning effect of the tip end portion of the pen tip by the ink absorber 11 and the function of preventing the ink at the tip end of the pen tip from being dried by the seal member 10 can be effectively exhibited.

  In the description based on FIG. 12, an example in which one molded body 13 is punched by a punching die schematically indicated by reference numeral 14, but this is a large number of moldings simultaneously at positions that do not overlap each other. The mold can be configured so that the body can be punched out, and the manufacturing efficiency can be improved by using the mold.

It is the front view which showed a 1st embodiment of a cap type writing instrument concerning this invention by a partial sectional view. It is sectional drawing which expanded and showed the cap member in embodiment shown in FIG. It is sectional drawing which expanded and showed the principal part of the cap member shown in FIG. It is an enlarged view of the sealing body employ | adopted as 1st Embodiment. It is a principal part expanded sectional view of the state which mounted | wore the ball-point pen main body with the cap member in 1st Embodiment. It is sectional drawing which showed the principal part of the cap member in 2nd Embodiment. It is a principal part expanded sectional view of the state which mounted | wore the ball-point pen main body with the cap member in 2nd Embodiment. It is sectional drawing which expanded and showed the cap member in 3rd Embodiment. It is an enlarged view of the ink absorber employ | adopted as 3rd Embodiment. It is sectional drawing which showed the manufacturing process which interposes a hot melt between each raw material of an ink absorber and a sealing body. It is the top view and sectional drawing which showed the process of performing thermocompression bonding in the superposition | polymerization state shown in FIG. FIG. 12 is a cross-sectional view illustrating a process of punching out a molded body using an ink absorber and a seal body after the thermocompression bonding process illustrated in FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing implement (ball-point pen) main body 2 Lead shaft 3 Back shaft 4 Cap 5 Ball-point pen tip 7 Cap member 7a Cap opening part 7b Cup-shaped member 8 Closure member 9 Clip 10 Sealing body 10A Constituent material 10a Thin part 11 Ink absorber 11A Constituent material of ink absorber 11a Penetration part 12 Hot melt 13 Molded body 14 Die for punching

Claims (9)

A writing instrument main body provided with a ballpoint pen tip at the tip and a writing instrument main body configured separately from the writing instrument main body and detachably attached to the writing instrument main body and capable of covering the ball-point pen tip when mounted A cap-type writing instrument composed of
A cap-type writing instrument, wherein an ink absorber capable of absorbing excess ink by an ink bottling attached to the ball-point pen chip when mounted on the writing instrument body is disposed in the cap member.   2. The cap-type writing instrument according to claim 1, wherein the ink absorber is configured such that a tip end portion thereof can penetrate the ink absorber when the ball-point pen tip comes into contact therewith.   The cap-type writing instrument according to claim 1 or 2, wherein a penetrating portion that allows the tip of the ball-point pen tip to pass through is formed in the ink absorber.   The cap-type writing instrument according to any one of claims 1 to 3, wherein the ink absorber is made of a porous material or a fiber bundle core.   5. The cap according to claim 1, wherein a seal body capable of covering a tip portion of the ball-point pen tip is disposed further inside the ink absorber in the cap member. Formula writing instrument.   6. The cap-type writing instrument according to claim 5, wherein the ink absorber and the seal body are joined to each other by melting a hot melt interposed therebetween.   7. The cap-type writing instrument according to claim 6, wherein the hot melt is formed in a mesh shape with a flat material. It is a manufacturing method which manufactures the molded object by the said ink absorber used for the cap type writing instrument of Claim 6 or Claim 7, and a sealing body,
A hot melt formed in a flat shape is interposed between the material constituting the ink absorber and the material constituting the seal body, and the hot melt is melted to melt the multilayer structure. Forming a coalescence;
From the direction orthogonal to the surface of the polymer, obtaining the molded body by punching the polymer of the multilayer structure with a predetermined area;
The manufacturing method which manufactures the molded object by the ink absorber and seal body characterized by performing these.   9. The molded body comprising an ink absorber and a seal body according to claim 8, wherein the plurality of molded bodies are obtained by simultaneously punching out the multi-layer polymer with a predetermined area at positions that do not overlap each other. Manufacturing method for manufacturing.

Images