JP4706992B2 - Liquid supply and nib or pen lead - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nib for writing, a permanent marker, a brush marker, a paint marker, a calligraphy, a line citation pen, a pen nib for a plotter or cosmetic, a relay nib, a lead nib or a flow core, And a liquid supply body having a multiple structure including an outer cylinder.
[0002]
[Prior art]
Conventionally, the liquid supply body used for the above-mentioned applications is formed by forming a groove by providing a rib in the axial direction, and the liquid supply body having the groove as a liquid conduction path is extruded using a synthetic resin. A method of manufacturing by processing is widely adopted.
[0003]
More specifically, the liquid supply body is extruded as a rod-like body having a required cross-sectional structure (hollow structure) from a die as disclosed in, for example, Japanese Patent Publication No. 61-21838. As shown in Japanese Patent Publication No. 53-27973, a large number of filaments set from a die are extruded, and the required cross-sectional structure (hollow) is utilized by utilizing the fusion property of filaments in a heated state. And a rod-like body having a structure).
[0004]
In these molded articles, the liquid conduction path through which ink or the like flows always has a constant cross-sectional shape .
Specifically, it is a straight line formed in parallel with the axial direction and has a structure in which a liquid (ink) is linearly supplied to an object. Therefore, the porosity is high and the liquid (ink) is high. of having a high retention force production is not difficult.
In general, a material having a high porosity has a reduced strength of the molded body itself, has a weak capillary force, and a weak liquid (ink) holding power.
[0005]
Therefore, in order to increase the strength of the molded body, upon formation of a liquid conductive paths, coupling the ribs to each other, in particular, Ru done often provided joint in the center portion of the cross section (the central core).
However, the coupling of the ribs results in dividing the liquid passages, and each forms independent liquid passages. If clogging occurs or depending on the form of use, all liquid passages are connected. At the same time, it becomes difficult to use the liquid for discharging, and as a result, there arises a problem that the liquid discharging property (outflow property) is lowered.
[0006]
In addition, in a water-based ballpoint pen with a thin tip, two or more different relay cores composed of a fiber bundle core and a plastic molded body obtained as described above are used as the liquid supply body, and the ink flow rate is adjusted. , that are carried out by a combination of these relay core.
However, the adjustment is not easy, requires considerable labor, and the cost of parts is not negligible.
[0007]
For example, the pipe end portion of the needle roller, the inner diameter is very thin as approximately 0.5 mm, the depth is also Ru 6mm about der.
Therefore, because correspondence is difficult in the fiber bundle core, this part using the wick of the plastic molding (bare rib), after the plastic molding, usually, that connects a fiber Tabashin.
However, if different relay cores are used, the ink flow rate changes depending on the combination of the cores and the connection condition, and the plastic molding is inserted into the pipe tip by pushing the fiber bundle core. In many cases, the insertion length into the lens is inaccurate, making it difficult to obtain a water-based ballpoint pen having satisfactory writing performance.
[0008]
[Problems to be solved by the invention]
As a result of intensive studies, the inventors have made a liquid supply body having a multiple structure composed of a core body and an outer cylinder body, and twists at least one of the core body and the outer cylinder body with respect to the axis. In addition, the groove-like liquid conduction path formed in the core or the outer cylinder is changed from a linear one formed in parallel to the axial direction to a spiral one, and the core and The inventors have found that the above-mentioned problems can be solved by making the outer cylindrical body have a structure in which liquid can freely flow between the respective groove-shaped liquid conduction paths, and the present invention has been completed.
[0009]
A first object of the present invention is to provide a liquid supply body which has a high capillary force even when the porosity is high, is excellent in ink holding ability, and is excellent in strength.
The second object is to provide a liquid supply body in which the capillary force and the ink flow resistance can be easily adjusted, and the strength can be easily adjusted regardless of the porosity.
[0010]
Furthermore, the present invention, unlike a relay core in a conventional water-based ballpoint pen or the like, can obtain a good ink outflow with little fluctuation, eliminates the difficult positioning of the relay core at the tip in the ballpoint pen tip, Another object of the present invention is to provide a liquid supply body that can be applied to a single relay core that reduces the cost of components.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention provides:
It consists of a core and an outer cylinder,
A liquid supply body characterized in that a groove-like liquid conduction path formed in the core body and a groove-like liquid conduction path formed in the outer cylinder body are in contact with each other in an oblique state. It is.
[0012]
The invention according to claim 2 of the present invention is
The liquid supply body according to claim 1 ,
A groove-like liquid conduction path formed in the core body,
It is a liquid supply body characterized by being formed by a plurality of ribs formed outward from the center of the core body.
[0013]
The invention according to claim 3 of the present invention is
The liquid supply body according to claim 1 ,
A groove-shaped liquid conduction path formed in the outer cylinder body,
It is a liquid supply body characterized by being formed by a plurality of ribs that are formed in the axial direction from the inner peripheral surface of the outer cylindrical body.
[0014]
The invention according to claim 4 of the present invention is
A pen tip comprising the liquid supply body according to claim 1 .
[0015]
The invention according to claim 5 of the present invention is
A pen lead core comprising the liquid supply body according to claim 1 .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a liquid supply body of the present invention, a pen tip using the liquid supply body, and a pen relay core will be specifically described with reference to the accompanying drawings.
[0017]
As shown in FIG. 3, the conventional liquid supply body 1a has a groove-like liquid conduction path 3 parallel to the axial direction formed by a plurality of ribs 2 protruding in the axial direction from the outer peripheral portion. The cross section is as shown in FIG.
[0018]
Various proposals have been made for the shape of the liquid conduction path 3, but it is difficult to solve the above-described problem only by changing the shape of the liquid conduction path 3 and to change the characteristics of the liquid supply body 1 a depending on the shape. This inevitably complicates the shape.
[0019]
When the liquid supply body 1b shown in FIG. 5 forms a groove-like liquid conduction path 3 parallel to the axial direction by a plurality of ribs 2 protruding in the axial direction from the outer peripheral portion in order to give strength, As shown in FIG. 5, by providing the joint (core) 4 at the center, the liquid conduction path 3 is divided and a large number of independent liquid guides are provided. Passages 3, 3 ... are formed.
[0020]
During their separate liquid conduits 3, 3 ... are used, i.e. during writing, when it is utilized as all liquid conduits, problems have greens.
However, in normal writing, only a part of the liquid conduction paths are used, and when viewed as a whole, the amount of outflow of ink or the like is reduced. Therefore, even if it is satisfactory in terms of strength, it must be said that the liquid supplier still has many problems.
[0021]
On the other hand, a liquid supply body 1c shown in FIG. 6 includes a cylindrical outer cylinder 5 having a plurality of ribs 2, 2... Protruding in the axial direction, and a core body provided in the outer cylinder 5. 6 is a known multi-structure liquid supply body (see, for example, Japanese Utility Model Laid-Open No. 57-138688 discloses a composite pen body). It has excellent durability and ink outflow properties suitable for writing and thin writing.
[0022]
However, since the conventional liquid supply body 1c has a part of a rib (projection piece) 6a protruding from the core body as a free end, the core body 6 is subtle when written using the liquid supply body 1c. It obtained only those soft writing feeling to swing, in order to obtain a thing hard writing feeling and bonding the 5 core 6 and the outer cylinder (outer member), the division of the liquid conduits 3 .
As a result, the above-mentioned problem occurs, and the liquid conduction path 3 is linearly provided in parallel to the axial direction. Therefore, if the porosity is increased, the ink holding force becomes weaker and the pen or the like is directed upward. When left unattended, there is a risk of causing a drain back phenomenon in which the ink returns downward.
[0023]
As shown in FIG. 1, the liquid supply body 10 of the present invention basically includes a core body 11 having groove-like liquid conduction paths 13 between ribs extending radially outward from the center portion, and an inner peripheral surface. A multi-layer structure including an outer cylindrical body 12 in which a groove-like liquid conduction path 14 is formed between a plurality of ribs projecting in the axial direction.
At that time, at least one of the core body 11 and the outer cylinder body 12 (in FIG. 1, the core body 11) is twisted with respect to the axis to form the core body 11 or the outer cylinder body 12. The groove-like liquid conduction path 13 is changed from a linear one formed parallel to the axial direction as in the prior art to a spiral one, and formed in the core 11 and the outer cylinder 12 respectively. In this structure, the liquid can freely flow between the groove-like liquid conduction paths 13 and 14.
[0024]
The multi-structure liquid supply body 10 including the core body 11 having the groove-like liquid conduction path 13 and the outer cylinder body 12 having the groove-like liquid conduction path 14 according to the present invention is manufactured by a conventionally known method. An example of this can be shown as follows.
[0025]
A core body 6 and an outer cylinder body 5 having a cross-sectional shape as shown in FIG. 2 are prepared from a thermoplastic resin such as polyacetal or polyamide by known extrusion molding .
The twist applied to the core body 6 or the outer cylinder body 5 having the linear groove-shaped liquid conduction path 3 parallel to the axial direction obtained by the extrusion is in a heated state during or after the molding by the extrusion molding machine. It may be applied to the substrate, or after stretching and cooling, it may be heated again and twisted and fixed by cooling.
[0026]
By inserting the core body 6 thus prepared into the outer cylinder body 5, the liquid supply body 10 of the present invention can be obtained.
[0027]
The liquid supply of the invention, besides the above example, by integral molding by extrusion molding the core and the outer cylinder body, or coated molded with an extrusion molding an outer cylinder body the shaped core Or by combining the core body and the outer cylindrical body by injection molding or machining, and further by a method such as a combination of machining and extrusion molding.
[0028]
In addition to the materials described above, the core and outer cylinder may be made of thermoplastic resin such as polyimide, polybutylene terephthalate, methacryl, nonyl, vinylidene fluoride, polyolefin resin, composite reinforced plastic, ceramic molded body, stainless steel, brass. It is possible to use metal materials such as white, carbide and carbide.
[0029]
Furthermore, as an outer cylinder, a main body such as a pen for mounting a liquid supply body or a mounting jig, a temporary ink storage member (bellows), a metal holder, a plastic holder, etc., with a groove on the inner surface, are left without a groove. Things can be replaced by providing grooves and utilizing these grooves as liquid channels.
In addition, a pen using the liquid supply body of the present invention can be obtained by inserting a core body provided with a spiral and groove-like liquid conduction path by twisting them.
[0030]
In the present invention, by twisting the core body 6 and the outer cylinder body 5, or the core body 6 and the outer cylinder body 5 having the groove-shaped liquid conduction paths 3, 3... As shown in FIG. 1, both liquid conduction paths 13, 14 intersect diagonally over the entire liquid supply body 10 to form a mesh-like capillary tube, which is formed in the core body 11 and the outer cylinder body 12. The liquid conduction paths that are made are three-dimensionally integrated so that the liquid can freely flow between them.
[0031]
The slit width and the mesh size in the mesh-like capillary tube formed in this way can be changed depending on the twisted state (crossed state) of the core body and the outer cylinder body.
That is, if the twist is increased, the number of intersections increases, and the number of liquid conduction paths between the two increases. If the twist is loose, the number of intersections decreases and the number of liquid conduction paths decreases, thereby reducing capillary force, porosity, ink discharge amount, etc. It can be easily prepared.
[0032]
In order to form the crossing state as described above, it is sufficient to twist either the core body or the outer cylinder body, twist them at different rotational speeds, or twist them in opposite directions, and most effectively mesh-like capillaries. In order to form a state, the two are twisted in opposite directions.
[0033]
When it is desired to increase the strength of the liquid supply body itself of the present invention, the core body and the outer cylinder body may be partially bonded, and the liquid conduction path is in a mesh-like capillary state. quite have adverse effects.
In order to increase the strength, it is also preferable to employ means for increasing the number of twists and increasing the number of intersections or combining the two together.
Adhesion is performed partially, and an adhesive may be used, and is performed by means such as heat fusion or ultrasonic fusion.
[0034]
However, when the liquid supply body of the present invention is used as a relay core for a water-based ballpoint pen, the core body and the outer cylinder body are not bonded or fused, and the core body is inserted into the outer cylinder body so as to be slidable. If the outer end of the core is not provided with an outer cylinder, the tip is inserted to the tip of the ballpoint pen tip and the rear end is extended to the bottom of the ink tank, a spring effect is generated on the core and the core is always Since the body is in contact with the ink, the occurrence of the drain back phenomenon can be prevented.
[0035]
Normally, the liquid supply of the invention is core body and the outer cylinder is made a pair, Ru is used as a pen tip or wick.
Depending on the application and purpose, a plurality of cores are inserted into one outer cylinder. For example, a pen core having a rectangular cross-section used for calligraphy has a plurality of cores in a rectangular outer cylinder. It is possible to insert a body and, after combining a plurality of them as a pair, perform necessary processing and use it as a pen nib or a relay core.
[0036]
[Action]
The liquid supply body of the present invention usually has a mesh-like shape by obliquely intersecting the groove-shaped liquid conduction path of the core body and the outer cylindrical body formed parallel to the axis line over the entire liquid supply body. Capillaries are formed, the liquid conduction paths are three-dimensionally integrated, and the liquid can freely flow between them .
Moreover, they are made by a simple operation of twisting the core and the outer cylinder, and the slit width and mesh size in the mesh-like capillaries are also different depending on the twisting condition of the core and the outer cylinder. The rate, ink discharge amount, strength, liquid flow rate, etc. can be easily adjusted, giving a solid writing feeling as a pen tip, and showing a good ink outflow amount.
[0037]
A liquid supply member of the present invention, when used as a wick for aqueous ballpoint pen, it is possible to unify different from that of the conventional ink shows the less effluent stable and fluctuates.
Furthermore, if the core is loosely inserted into the outer cylinder, the rear end is extended to the bottom of the ink tank, and the spring effect is applied to the core, the relay core in the ballpoint pen tip pipe can be accurately positioned, The drain back phenomenon can also be prevented.
[0038]
【Example】
Hereinafter, specific examples of the liquid supply body of the present invention will be described.
<Example 1>
Using a polyacetal resin, a core constituting a liquid supply body composed of a core having the shape shown in the cross-sectional view of FIG. 2 and an outer cylinder (outer diameter φ1.5 mm, φ2.3 mm) was prepared by extrusion molding.
The obtained core body 6 was twisted (number of times: 1.3 to 4.8 / 20 mm, 1.0 to 3.0 / 40 mm), and then heated to fix the twist.
The core body to which the twist was fixed was inserted into the outer cylinder body and prepared.
The flow rates when a water pressure of 500 mmAq was applied to the obtained liquid supply bodies 10 having different shapes were measured, and the results are shown in Tables 1 and 2 below.
However, Table 1 shows the results of the outer cylinder having an outer diameter of φ1.5 mm and a length of 20 mm, and Table 2 shows the results of the outer cylinder having an outer diameter of φ2.3 mm and a length of 40 mm.
As is apparent from the table, the flow rate can be easily adjusted by simply adding a twist.
[0039]
[Table 1]
[0040]
[Table 2]
[0041]
<Example 2>
About the liquid supply body obtained in Example 1, the tip portion was processed to make a pen tip of a plastic pen (plastic pen), and the performance of the pen tip having the structure shown in FIG. 5 was compared by a writing test.
Table 3 shows the results of the writing test performed at a writing angle of 70 °, a writing load of 100 g, a writing speed of 9.0 m / min, and Baumgertner Paper as writing paper.
As is clear from the table, the plastic pen as the pen tip using the liquid supply body of the present invention has a higher ink flow rate and is easier to prepare than the pen tip having the structure shown in FIG. .
[0042]
[Table 3]
[0043]
【The invention's effect】
The liquid supply body according to the present invention includes a core body and an outer cylinder body, and a groove-like liquid conduction path formed in the core body and a groove-like liquid conduction path formed in the outer cylinder body, The surface is imparted with a characteristic of high porosity and high capillary force that could not be achieved by simple means of contacting the surfaces in an oblique state.
[0044]
In particular, the liquid supply member is excellent in ink holding capacity, on excellent strength, easy adjustment of the capillary force and the ink flow resistance, but the adjustment of strength with excellent easy regardless gas porosity.
[0045]
The relay core in such an aqueous ballpoint pen using a liquid supply member of the present invention, Ru is obtained is less good ink runoff fluctuation.
Furthermore, the difficult positioning of the relay core at the tip of the ball-point pen tip is not required, and the assembly labor and the cost of parts are reduced, and a unified relay core is made possible.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing an example of a liquid supply body according to the present invention.
FIG. 2 is a cross-sectional view of the liquid supply body shown in FIG.
FIG. 3 is a perspective view showing an example of a conventional liquid supply body.
4 is a cross-sectional view of the liquid supply body shown in FIG.
FIG. 5 is a cross-sectional view showing another example of a conventional liquid supply body.
FIG. 6 is a cross-sectional view showing an example of a conventional multi-structure liquid supply body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b, 1c Conventional liquid supply body 2 Rib 3, 13, 14 Liquid conduction path 4 Junction part (core)
5 Outer cylinder body 6 Core body 10 Liquid supply of the present invention

Claims (5)

It consists of a core and an outer cylinder,
A liquid supply body characterized in that a groove-like liquid conduction path formed in a core body and a groove-like liquid conduction path formed in an outer cylinder body are in contact with each other in an oblique state. The groove-like liquid conduction path formed in the core is
2. The liquid supply body according to claim 1 , wherein the liquid supply body is formed by a plurality of ribs formed outward from a center portion of the core body. The groove-shaped liquid conduction path formed in the outer cylinder is
2. The liquid supply body according to claim 1 , wherein the liquid supply body is formed by a plurality of ribs formed in an axial direction from an inner peripheral surface of the outer cylindrical body. A nib comprising the liquid supply body according to claim 1 . A pen relay core comprising the liquid supply body according to claim 1 .