JP6279260B2 - Nib manufacturing method - Google Patents

Description

  The present invention relates to a nib, an applicator, and a nib manufacturing method.

  Some applicators, such as writing tools and cosmetic tools, provide a brushed portion so as to obtain a soft writing feeling, touch, etc. during application.

  For example, in patent document 1 (FIG. 1 etc.), the applicator which has a raising part on the surface of a base material is disclosed. The raising | fluff in patent document 1 is implement | achieved by the flock process which plants the short fiber called a pile on the surface of a base material. Here, the flocking is a method in which an adhesive is applied to the surface of a base material, a direct current high voltage is applied to generate static electricity, and a pile is planted.

  However, since the pile is adhered to the base material with an adhesive in the flocking process, there is a problem that the pile falls off the base material due to a decrease in the adhesive strength of the adhesive or the like. In addition, when the coating liquid is sucked up to the raised portion by the capillary force of the base material and used as an applicator for applying at the raised portion, the adhesive hinders the flow of the coating liquid from the base material to the raised portion, and the ink flow deteriorates. There is a problem to do. In addition, the flocking manufacturing process usually requires two steps: a base material forming process and a flocking process. In addition, the flocking process requires a separate flocking processing facility, which makes the manufacturing process redundant. In addition, there is a large investment burden for manufacturing equipment.

Japanese Patent Laid-Open No. 10-192045

  The present invention has been made in view of the above circumstances, and a problem to be solved by the present invention is to provide a pen tip that can suppress the falling off of the raised hair and can maintain the ink flow well.

  One means for solving the above-mentioned problems is to form a rod-shaped main body portion obtained by converging nylon fibers, polyester fibers, acrylic fibers or mixed fibers in the longitudinal direction, and a large number of fibers on the longitudinal end surfaces of the main body portions. And a raised portion having a fluffing structure, wherein the raised portion and the main body are integrally formed as a series.

  By configuring the present invention as described above, it is possible to provide a nib that can prevent the brushed hair from falling off and maintain a good ink flow.

It is a side view which shows an example of the nib which concerns on this invention. It is a perspective view showing an example of a nib concerning the present invention. It is a side view which shows an example of the applicator which concerns on this invention. It is a side view which shows an example of the applicator which concerns on this invention. It is a perspective view which shows an example of the manufacturing method of the nib which concerns on this invention. It is a side view which shows an example of the manufacturing method of the nib which concerns on this invention.

The first feature of the present embodiment is that a rod-shaped main body portion formed by converging nylon fibers, polyester fibers, acrylic fibers or mixed fibers in the longitudinal direction, and a large number of fibers on the longitudinal end surfaces of the main body portions. And a raised portion having a fluffing structure, wherein the raised portion and the main body are integrally formed as a series.
By configuring the pen tip in this way, the raised part is integrally formed with the same fiber material as the main body part, and since the raised part is not joined to the main body part with an adhesive like a flocked product, It is possible to prevent a problem that the raised portion falls off due to a decrease in the adhesive force. Further, since clogging of an adhesive or the like does not occur between the fibers of the main body portion and the raised portion, it is possible to sufficiently ensure the outflow of the coating liquid from the main body portion to the raised portion, and it is possible to maintain the ink flow well.

  As described above, the present invention is a nib composed of a rod-shaped main body portion and a raised portion in which the main body portion is formed by converging nylon fibers, polyester fibers, acrylic fibers or mixed fibers in the longitudinal direction. Although the coating liquid is sucked up by the capillary force of the fiber, the coating liquid is infiltrated into the raised portion formed continuously in the main body, and what can be applied at the raised portion is assumed first. It may be applied by directly penetrating and adhering a coating solution or the like.

  The shape of the main body is only described as a rod shape and is not limited to a specific shape, and may be any shape such as a columnar shape or a prismatic shape. In addition, the rear end shape of the main body may be processed into a specific shape so that it can be fixed to a holder or the like assembled to the applicator.

  As will be described later, the raised portion is formed integrally with the main body portion by the same fiber material as the main body portion by polishing the longitudinal end portion of the fiber rod.

There is no restriction on the outer shape of the raised portion, for example, it may be a cylinder with a certain thickness in the vertical axis direction of the longitudinal end surface of the main body, or the raised portion may be changed to a slope shape. It is good also as an oblique cut cylinder shape. Further, a dome shape or the like in which the vicinity of the center of the raised portion gradually rises may be used.
If the raised portion is formed with a certain thickness in the direction of the vertical axis of the longitudinal end surface of the main body portion, the tip end surface of the raised portion is substantially uniform when the tip end surface of the raised portion is in contact with the application target and applied. Therefore, there is an advantage in that uniform application can be realized over the entire raised portion.

The length of each fiber in the raised portion is not limited. For example, all the fiber lengths in the raised portion may be uniform, or each fiber length may be random.
Here, if the length of each fiber in the raised portion is made random, short fibers and long fibers are mixed in the raised portion. Since the short fiber has a stronger repulsive force than the long fiber, the short fiber supports the long fiber, and has an effect of improving the fluff of the entire fiber in the raised portion. Moreover, the weight of the fiber of a raising part becomes small because a short fiber is contained. Therefore, by making the length of each fiber in the raised portion random as described above, the fluffing can be improved, and the weight feeling of the fiber can be reduced, and a soft raising with a soft touch can be realized. Is possible.

  The fiber direction (direction of fluffing) of each fiber in the raised part is not limited. However, if the fiber direction of each fiber is almost constant, the hair waves of each fiber in the raised part are aligned, so it is natural when applying. A good coating feeling can be obtained.

  In addition, if both the length and the fiber direction of each fiber of the raised portion are substantially constant, when applying a constant load to the tip surface of the raised portion by pressing the tip surface of the raised portion parallel to the application target, Since the front end surface of the raised portion is bent uniformly, there is little variation in the application range depending on the raised portion, and more uniform application can be realized over the entire raised portion.

  The shape of each fiber in the raised portion is not limited, and various shapes such as a straight type and a curved type can be selected.

  The fibers used may be not only fibers having a certain thickness but also two kinds of fibers having different thicknesses. By mixing fibers with different thicknesses at an appropriate ratio, it is possible to adjust the fuzziness and the feel. For example, if the amount of thick fibers is increased, a good fuzzing effect can be obtained, but the softness of raising is reduced. On the other hand, if the amount of thick fibers is reduced, the fuzzing effect is reduced, but softness of raising can be realized. The distribution of fibers having different thicknesses can be appropriately set according to the application.

As a second feature of the present embodiment, in addition to the first feature, the shape of the end surface in the longitudinal direction of the main body portion is inclined with respect to the longitudinal direction of the main body portion.
By configuring the nib in this way, the raised portion that is the application site is formed on the end face in the longitudinal direction with a slope, so that when applying, the nib is held obliquely with respect to the application target Thus, the ease of holding the applicator is improved.
In addition, when the longitudinal end surface of the main body is inclined with respect to the longitudinal direction, the area of the longitudinal end surface of the main body inevitably increases, and there is an advantage that a sufficient raised region can be secured. For example, if the main body is an elongated cylinder and the longitudinal end of the cylinder is processed into a slope shape, the end face of the cylinder becomes elliptical, and the area of the end face is the area of the end face when not processed (in this case, It is necessarily larger than the area of the perfect circle that is the upper surface of the cylinder). This is effective in that a sufficient raised region can be secured even when a small-diameter fiber rod is used for the pen tip.

  Note that the end surface of the body portion formed in a slope shape does not need to be strictly flat, and may have a slightly curved shape. For example, a slightly curved shape such as a nail shape is also included.

  Further, the number of end faces to be inclined is not limited, and a plurality of end faces may be formed. If the number of end faces cannot be specified, for example, the longitudinal end of the main body is conical. This is also a category.

A third feature of the present embodiment is that the applicator is formed by fixing the main body portion of the nib having the first or second feature to the applicator main body portion.
By configuring the applicator in this manner, the pen nib is fixed to the applicator main body part via the main body part, and therefore the shape of the main part of the nib ( A common applicator body can be used as long as the outer diameter does not change. Therefore, it is possible to provide an applicator having various raised portions only by exchanging the nib, and to reduce the design cost of the applicator main body.

  As an applicator, first, the capillary force of the main body of the pen nib is used, and the application liquid existing inside the applicator main body is sucked up to the raised part by the main body of the pen nib and applied by the raised part. Second, it is conceivable to use an application material or the like directly applied to the raised portion rather than utilizing the capillary force of the main body.

The fourth feature of the present embodiment is a nib manufacturing method having the first or second feature, in which the longitudinal end of the fiber rod is polished by polishing the longitudinal end of the fiber rod. A raised portion is formed on the end face.
By configuring the nib manufacturing method in this manner, the fibers at the longitudinal ends of the fiber rod are unwound by polishing, and the raised portions are formed on the longitudinal ends of the fiber rod. That is, since the raised portion is formed as a part of the fiber rod by polishing the fiber rod itself, it results from a decrease in the adhesive strength peculiar to a flocked product that bonds the main body portion and the raised portion of the pen tip. The problem of falling off the raised part does not occur. In addition, the raised part has continuity between the main body part and the fiber, and clogging of adhesive etc. does not occur between the fiber of the main part of the nib and the raised part like flock processing, so the raised part from the main part to the raised part Sufficient outflow of the coating liquid can be secured, and the ink flow can be maintained well.

  In addition, the shape of the fiber rod material to be polished can be appropriately selected according to the characteristics and shape of the nib desired to be obtained as a product. For example, the shape of the fiber rod may be cylindrical or bullet-shaped.

As a fifth feature of the present embodiment, in addition to the fourth feature, the polishing is performed while the longitudinal direction of the fiber rod is kept parallel to the plane perpendicular to the rotation axis of the cylindrical rotating grindstone. is there.
By configuring the nib manufacturing method in this way, polishing can be efficiently performed with a rotating grindstone, and polishing is performed along the fiber direction (longitudinal direction) of the fiber rod material. A raised portion having a level of bristles is formed.

  As described above, it is important that the longitudinal direction of the fiber rod is kept parallel to the plane perpendicular to the rotation axis of the cylindrical rotating grindstone, and other points can be appropriately selected according to a conventional method. Well, it does not impose other restrictions. In other words, as long as the condition that the longitudinal direction of the fiber rod is parallel to the plane orthogonal to the rotation axis of the cylindrical rotating grindstone during polishing is satisfied, the position and posture of the fiber rod need not be fixed. Similarly, the position and posture of the rotating grindstone need not be fixed. As specific examples based on these, the following polishing methods are conceivable.

(1) The position of the rotating grindstone is fixed, and the fiber rod is conveyed at a constant speed toward the rotating grindstone while the longitudinal direction of the fiber rod is kept parallel to the plane perpendicular to the rotation axis of the rotating grindstone. Has been. While the fiber rod is conveyed as it is at a constant speed, the end of the fiber rod interferes with the rotating grindstone, and the end of the fiber rod is polished.

(2) The position and orientation of the fiber rod are fixed, and the rotating grindstone is constant toward the fiber rod while maintaining the longitudinal direction of the fiber rod parallel to the plane perpendicular to the rotation axis of the rotating grindstone. Transported at speed. While the rotating grindstone is conveyed as it is at a constant speed, the fiber rod end and the rotating grindstone interfere with each other, and the fiber rod end is polished.

(3) The fiber rod is conveyed at a constant speed toward the rotating grindstone while maintaining the longitudinal direction of the fiber rod parallel to the plane orthogonal to the rotation axis of the rotating grindstone. When polishing, the fiber rod is stopped for a certain time, and the end of the fiber rod is polished while the rotating grindstone arbitrarily moves on a plane orthogonal to the rotation axis of the rotating grindstone during the stop time.

(4) The position of the rotating grindstone is fixed, and the fiber rod rotates about the longitudinal direction of the fiber rod, and the longitudinal direction of the fiber rod is parallel to the plane perpendicular to the rotation axis of the rotating grindstone. Is held at a constant speed toward the rotating grindstone. While the fiber rod is conveyed as it is at a constant speed, the end of the fiber rod interferes with the rotating grindstone, and the end of the fiber rod is polished.

(5) The fiber rod is rotating about the longitudinal direction of the fiber rod, but the position of the fiber rod is fixed, and the rotating grindstone is the rotational axis of the rotating grindstone. It is conveyed at a constant speed toward the fiber rod while maintaining parallel to a plane orthogonal to the fiber. While the rotating grindstone is conveyed as it is at a constant speed, the fiber rod end and the rotating grindstone interfere with each other, and the fiber rod end is polished.

(6) While the fiber rod rotates about the longitudinal direction of the fiber rod as an axis, the longitudinal direction of the fiber rod keeps parallel to the plane orthogonal to the rotation axis of the rotary grindstone, toward the rotating grindstone It is transported at a constant speed. When polishing, the fiber rod is stopped for a certain time while maintaining the shaft rotation, and the end of the fiber rod is polished while the rotating grindstone arbitrarily moves on the plane perpendicular to the rotation axis of the rotating grindstone during the stop time. .

  As described above, various embodiments can be considered. In said (4) thru | or (6), in order to grind | polish, rotating a fiber rod, the fiber rod end part is grind | polished over the perimeter.

  For conditions such as the thickness of the rotating whetstone, the outer diameter of the rotating whetstone, the type of whetstone, the rotating speed of the rotating whetstone, the conveying speed of the fiber rod or the rotating whetstone, etc. It can be determined accordingly.

  Here, when the outer shape of the raised portion is a special shape, a process for shaping the outer shape of the raised portion into a specific shape may be separately required as a post-polishing process.

  Next, an example of a nib having the above-described features will be described with reference to the drawings (see FIGS. 1 and 2).

  FIG. 1 is a side view of the nib of the present invention, and FIG. 2 is a perspective view. In FIG. 1, the nib is made of a cylindrical fiber rod in which fibers are focused in the longitudinal direction (upward in FIG. 1), and the nib is composed of a main body part 1 and a raised part 2 having a structure in which fibers fluff. . The pen tip has a boundary surface 3 whose end surface is inclined, and the main body portion 1 and the raised portion 2 are integrally formed of the same material through the boundary surface 3.

  Specifically, the nib of the present example was prepared by passing a fiber bundle of polyester fibers through a forming die, heating the fiber rod material formed into a cylindrical shape and immersing it in a resin binder liquid, and then drying it with a drying device. It is obtained by curing, further passing through a heating device, curing the resin, forming, then cutting to a predetermined length, and polishing and brushing the ends of the fiber rod.

  In the case of this example, the length of the nib in the longitudinal direction was about 35 mm, the outer diameter of the main body 1 was about 5 mm, and the fiber length of the raised portion 2 was about 1.5 mm. In this embodiment, the pen nib has a small diameter, but the pen nib size can be selected in a timely manner according to the application. The angle of the boundary surface 3 was inclined about 20 degrees with respect to the longitudinal direction of the main body 1.

  By configuring the nib as described above, the raised portion 2 is integrally formed of the same fiber material as the main body portion 1, and the raised portion is joined to the main body portion with an adhesive like a flocked product. Therefore, the problem that the raised portion falls off due to a decrease in adhesive force or the like can be prevented. Further, since clogging of an adhesive or the like does not occur between the fibers of the main body 1 and the raised portions 2, it is possible to sufficiently ensure the outflow of the coating liquid from the main body 1 to the raised portions 2, and it is possible to maintain the ink flow well.

  Next, embodiments of the applicator having the above-described features will be described with reference to the drawings (see FIGS. 3 and 4).

  3 and 4 show applicators having different specifications of the raised portion of the pen tip. Specifically, in FIG. 3, the pen tip of FIG. 1 is used. On the other hand, in FIG. 4, different pen tips with different inclination angles of the boundary surface 3 are used. Here, the shape of the main body 1 of the nib in FIGS. 3 and 4 is the same, and the main body 1 is fixed to the applicator main body 4.

  What is important here is that the same applicator main body 4 can be used even if the specification of the raised portion 2 of the pen tip is different as shown in FIGS. This is because the raised portions 2 in FIGS. 3 and 4 are fixed to the applicator main body 4 via the main body 1 of the common nib, so there is no need to change the specifications of the applicator main body 4. It is.

  By configuring the applicator as described above, applicators having different specifications of the raised portions 2 as shown in FIGS. 3 and 4 can be realized without changing the specifications of the applicator main body. Therefore, it is possible to provide an applicator having various raised portions only by exchanging the nib, and to reduce the design cost of the applicator main body.

  Next, an embodiment of a method for manufacturing a pen tip having the above-described features will be described with reference to the drawings (see FIGS. 5 and 6).

  First, as a pre-stage, a fiber bundle of polyester fibers is passed through a forming die, heated and formed into a cylindrical shape, immersed in a resin binder solution, dried and cured with a drying device, and further passed through a heating device. The resin is cured and molded, then cut to a predetermined length, and the fiber rod 5 is manufactured.

  Thereafter, the fiber rod 5 (work target) in FIG. 5 is placed on a conveyor or the like of a polishing machine, and the longitudinal direction of the fiber rod 5 is kept parallel to the plane perpendicular to the rotation axis of the rotating grindstone 6 while maintaining the fiber. The bar 5 is conveyed at a constant speed toward the disk-shaped rotating grindstone 6 (see FIG. 5 before polishing). While maintaining the speed as it is, the end portion in the longitudinal direction of the fiber rod 5 is polished and raised by the rotating grindstone 6 (refer to FIG. 5 during polishing). At this stage, the longitudinal end of the fiber rod 5 interferes with the rotating grindstone 6, the interference region between the fiber rod 5 and the rotating grindstone 6 is polished, and the fibers at the longitudinal end of the fiber rod 5 are unwound and raised. At the same time, the end of the fiber rod 5 is formed into a shape corresponding to the interference region (in the present embodiment, a slope). Further, the fiber rod 5 is conveyed while the speed is constant, and the polishing process is finished (see FIG. 5 after polishing). The brushed nib is manufactured by the above steps.

  FIG. 6 shows a side view during polishing. The arrow written on the rotating grindstone 6 indicates the direction of rotation of the rotating grindstone 6. The hatched area at the end of the fiber bar 5 is an interference area between the fiber bar 5 and the rotating grindstone 6, and the area is polished by the rotating grindstone 6, and the end of the fiber bar 5 corresponds to the interference area. As a result, the fibers in the interference area are unraveled and raised.

  By configuring the nib manufacturing method as described above, fibers are unwound by polishing, and a raised portion is formed on the longitudinal end surface of the fiber rod. That is, since the raised portion is formed as a part of the fiber rod material by polishing the fiber rod itself, the raised portion caused by a decrease in the adhesive strength peculiar to a flocked product that bonds the main body portion of the nib and the raised portion. There is no problem of falling off. In addition, the raised part has continuity between the main body part and the fiber, and clogging of adhesive etc. does not occur between the fiber of the main part of the nib and the raised part like flock processing, so the raised part from the main part to the raised part Sufficient outflow of the coating liquid can be secured, and the ink flow can be maintained well. Furthermore, since the ends in the longitudinal direction of the fiber rod material are formed into a sloped shape and the raising is realized at the same time, the forming process and the raising process can be realized in a single process, and the man-hour for manufacturing a raised processed product can be reduced. . Moreover, since a separate flocking processing facility is not required unlike the flock processing, the investment burden on the manufacturing facility can be suppressed.

DESCRIPTION OF SYMBOLS 1 Nib body part 2 Nib raising part 3 Nib boundary surface 4 Applicator body part 5 Fiber rod 6 Rotating grindstone

Claims (2)

Nylon fiber, polyester fiber, acrylic fiber, or a rod-like main body formed by converging fibers mixed in the longitudinal direction, and a raised portion having a structure in which a large number of fibers fluff on the longitudinal end surface of the main body. A method of manufacturing a nib, the longitudinal direction of a fiber rod obtained by converging fibers in the longitudinal direction is maintained parallel to a plane perpendicular to the rotation axis of a cylindrical rotating grindstone, and the longitudinal direction of the fiber rod A method of manufacturing a nib, characterized in that the raised portion is formed on the longitudinal end surface of the main body by polishing the end so as to interfere with the longitudinal direction of the main body by the rotating grindstone . 2. The method of manufacturing a nib according to claim 1, wherein the shape of the end face in the longitudinal direction of the main body is inclined with respect to the length of the main body.