JPH09108606A - Coating applying tip of coating applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the deterioration in the smoothness of the coating liquid discharge occurring in the deposition of the settled matter in the coating liquid, the fibers of a material to be coated and the adhered matter on the surface in the spacing between the ball holder at a coating applying tip and a ball pressing member. SOLUTION: The coating liquid flow hole 3 of the ball holder 1 of the coating applying tip of the coating applicator constituted by using a ball 2 as a coating applying medium and disposing the pressing member 4, such as spring, to the inside wall surface 1g of the front end edge caulking part of a ball holder 1 embracing the ball to press the ball at all times is formed to the max. diameter in the aperture 1a at its rear end to reduce the diameter toward the top end, is formed to the bore in the rear end position 1b of the ball sufficiently larger than the ball diameter and is formed to the diameter slightly larger than the ball diameter in the aperture 1c at the top end. After the front end edge 1d is caulked inward, the caulking part (front end edge) is rounded by barrel polishing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application tip portion using a ball as an application medium of an applicator which is a container in which a correction liquid for erasing, a paint, a cosmetic liquid such as nail polish, and a coating liquid such as liquid glue are contained.

[0002]

2. Description of the Related Art A ball is used as a coating medium, a part of the ball is exposed to the outside, and the tip edge is swaged inward with a sufficient holding force. The application tip portion of the applicator, which is formed by arranging a pressing member such as a spring for pressing the ball toward the tip edge of the holder in a metal ball holder formed in the same spherical surface, is, for example, in Japanese Utility Model Laid-Open No. 5-76569. A ball holder that has a ball seat and a spring that directly presses the ball, or a ball holder that also has a ball seat that is configured to transmit the pressing force of the spring to the ball through a mover. Like No. 5-76568, when the application pressure is applied, the ball comes into contact with the ball seat and rotates, so basically, the tip edge of the ball holder does not come into contact with the object to be coated, As in No. -80791, the pressing force of the spring is transmitted to the ball through an urging rod that contacts the ball in the tube whose tip is drawn, and when the application pressure is applied to the ball, the ball There is a type in which the tip end edge of the tubular body comes into contact with the object to be coated while rotating and sinking on the contact surface with the pressing member. Further, Japanese Patent Application Laid-Open No. 6-15218 discloses a processing means for hammering the inner wall of the caulking portion at the leading edge to form the inner wall surface into a spherical surface having the same shape as the ball to improve the valve function of the coating tip.

[0003]

In the prior art, the type in which the ball rotates by contacting the ball seat provided in the ball house of the holder adds a clearance between the ball and the ball house to the ball. Since the flow rate of the coating solution is constant regardless of the coating pressure, a container made of a flexible material controls the coating pressure by applying pressure to the ball and adjusting the container pressure. If the inside of the container is in a pressurized state, there is an advantage that a mechanism for discharging a fixed amount of the coating liquid can be obtained by applying the coating pressure to the ball. On the other hand, on the other hand, unlike writing letters on paper with a ballpoint pen, for example, contacting the ball with the object to be coated is not enough to discharge the coating liquid, so the pressing force applied to the container is strong and the inside of the container is under pressure. As for the product, the discharge amount is increased from the beginning. Therefore, the state of being applied to the object to be coated causes the liquid to rise and it takes time to dry, and further, the dried coating liquid film and especially the white pigment used for the correction liquid are clogged around the ball seat and in the coating liquid flow passage. It also had drawbacks such as loss of smoothness in liquid ejection.

Further, in the type in which the ball sinks when an application pressure is applied and the tip edge of the holder comes into contact with the object to be coated, the ball rotates between the object to be coated and the contact surface of the pressing member. It is devised so that the application liquid can be applied in a substantially flat state by keeping the pressure constant and appropriately controlling the pressing force applied to the container for discharging the liquid. However, in order to apply in a substantially flat state, it is necessary to always contact the tip edge with the object to be coated, and depending on the state of the tip edge, the object to be coated may be scratched,
There has been a drawback that fibers of an object to be coated and deposits on the surface, which are mixed in the coating liquid, are accumulated between the holder and the ball pressing member, resulting in loss of smoothness in discharging the liquid.

Therefore, the inventor of the present invention observed both types described above, and found that not only the performance immediately after manufacturing but also the performance that deteriorates during use, especially the smoothness of discharge of the coating liquid cannot be obtained. We focused on how to improve the common defects. That is, in the former type, in which the ball contacts the ball seat and rotates when the application pressure is applied, the dry coating liquid film and especially the white pigment used for the correction liquid may cause a clogging phenomenon around the ball seat or in the coating liquid flow passage. When the coating liquid is discharged, smoothness is lost, and in the latter case, the ball sinks when the coating pressure is applied and the tip edge of the holder contacts the object to be coated. It is intended to eliminate the loss of smoothness in the discharge of the coating liquid due to the accumulation of fibers of the coating material and the adhered substances on the surface mixed with the coating liquid in the coating liquid.

[0006]

The performance that deteriorates with repeated use, that is, the smoothness of discharge of the coating liquid, deteriorates faster as the ball diameter decreases. The reason is that in the coating tip portion having the ball seat, it is difficult to form a gap enough to allow the coating liquid to sufficiently flow around the ball seat and the periphery of the ball pressing member. The tip of the ball that comes into contact with the object to be coated has a small protrusion of the ball and the tip has a shape that is close to a point. The reason is that the gap between the tubular body holder and the ball pressing member (rod-shaped body) cannot be sufficiently secured, and as a result, the precipitate of the coating liquid and the foreign matter caught by the balls are accumulated in the gap portion.

The present invention has been made in view of the above situation, in which a metal wire is used for a ball holder, and the coating liquid flow hole is reduced in diameter toward the tip with the rear end opening having the maximum diameter, and after the ball is mounted. By forming the inner diameter of the ball rear end position of the above-mentioned ball diameter to be sufficiently larger than the ball diameter and slightly larger than the ball diameter at the tip opening, it is possible to set the gap between the holder and the ball pressing member with a margin. In addition, the problem is solved by cutting the outer diameter of the tip into a tapered shape so that the tip has the required thickness, and then caulking the tip inward and then rounding the caulked part by barrel polishing. And is a means for

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a coating tip portion of an applicator which is a container in which a correction fluid for eraser, a paint, a cosmetic fluid such as nail polish, and a coating fluid such as liquid glue are stored in a container. A metal that is used as a coating medium, has a part of the ball exposed to the outside, and has a sufficient holding force to caulk the tip edge inward, and the inner wall surface of the caulking part of the tip edge is formed into a spherical surface of the same shape as the ball. Stabilize the smoothness of the discharge of the coating liquid, which deteriorates with repeated use, with respect to the coating tip part that is configured by arranging a pressing member such as a spring that presses the ball toward the tip edge of the holder in the ball manufacturing holder. Therefore, a metal wire rod is used for the ball holder, and the rear end opening is reduced in diameter toward the tip with the maximum diameter, and the inner diameter of the ball rear end position after mounting the ball is sufficiently larger than the ball diameter. Slightly larger coating A liquid flow hole is drilled and the outer diameter of the tip is tapered so that the tip has the required thickness.The tip is swaged inward, and then the barrel is rounded by barrel polishing. It has been given.

Further, according to the present invention, since the leading edge crimping portion rounding process of the ball holder for 0.3 mm to 1.0 mm, which belongs to the category of small ball diameter, is made uniform, the caulking jig for the caulking process of the leading edge is performed. The first crimping angle to 95 ° to 75 °, and then the second crimping angle to 145 so that the tip opening diameter becomes 90 to 75% of the ball diameter.
After being formed at a angle of from 115 ° to 115 °, the caulked portion is rounded by barrel polishing.

According to the present invention, particularly the ball diameter is 0.3 mm.
At the tip of the coating area, which is as small as 1.0 mm, a space is created in the radial direction between the ball holder and the pressing member that presses the ball, and the coating solution can easily flow through the coating solution flow hole of the holder. The caulked shape of the edge does not have a sharp tip edge and a smooth rounded shape can be obtained by barrel polishing for a short time, and the tip edge comes into contact with the object to be scratched, or the fiber of the object to be coated Since it was possible to suppress the entrapment of substances on the surface and the surface of the applicator, it was possible to use the applicator in a stable manner for a long period of time without the astringent phenomenon of discharging the coating liquid during use, which often occurs in conventional applicators.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings showing the embodiments and the tables and drawings showing the specifications of the caulking portion of the tip of the holder obtained from the experimental results.

FIG. 1 is a partially cut-away vertical cross section of a coating tip portion showing an embodiment of the present invention, FIG. 2 is an enlarged explanatory view of a caulking shape of a tip of a ball holder of the embodiment, and FIG. 3 is also barrel polishing. FIG. 6 is an enlarged explanatory view of a rear end edge and a caulking portion inner wall surface shape after a hammer ring.

The coating tip ball holder 1 of the present invention is machined from a metal wire material such as free-cutting stainless steel. That is, the rear end opening 1a has the maximum diameter and is stepwise reduced toward the tip, and the inner diameter of the ball rear end position portion 1b after the ball is attached is sufficiently larger than the ball diameter, and the tip opening 1c is larger than the ball diameter. A coating solution flow hole 3 having a slightly larger diameter is bored, and the outer diameter of the tip portion is tapered so that the tip edge 1d has a required thickness.
After caulking the leading edge inward, the caulking portion 1e is rounded by barrel polishing. In the example, the diameter of the coating liquid flow hole 3 was reduced stepwise from the rear end to the tip, but it is of course possible to reduce the diameter of the coating liquid in a taper shape. It is important that the diameter of the ball is increased from the front end to the rear end, and the inner diameter of the ball rear end position portion 1b after the ball is attached is set sufficiently larger than the ball diameter.

Ball 2 as a coating medium used in the present invention
Includes a small-diameter coating medium such as a ball diameter of 0.3 mm or 0.5 mm, which has not been conceived up to now as a coating medium used in a coating tool, and therefore the shape of the coating liquid flow hole 3 of the ball holder 1 described above. In addition to the above, the foreign matter released from the fibrous material such as paper, wood board, and cloth, and the coating liquid film that has been dried and hardened around the coating medium are caught in the coating destination through the coating medium. It is important to eliminate the cause of loss of smoothness in discharging the coating liquid that accumulates inside the part.

Therefore, one of the methods is to crimp the tip edge 1d of the ball holder 1 that comes into contact with the object to be coated with a crimping jig, and then round the crimped portion 1e by barrel polishing. Even if barrel-polishing is performed on a product which has been caulked by a normal caulking method, there is a certain effect, but as the diameter of the tip opening 1c becomes smaller, the ball 2
Since the thickness of the tip edge that holds the ball becomes thin, if you try to sufficiently round the crimped portion by barrel polishing, the tip opening diameter 1f (Fig. 3) after crimping to hold the ball will expand and There is a danger of falling off, and conversely there is a problem that the effect of barrel polishing cannot be obtained if saved.

According to the present invention, in order to effectively carry out the rounding of the tip edge caulking portion 1e by barrel polishing, the caulking of the tip edge 1d, in which the barrel polishing time is short and the smooth rounding is guaranteed, is obtained from the experimental results. The first caulking angle θ1 and the second caulking angle θ2, and the regularity for obtaining the optimum rounded shape for the tip opening diameter 1f are found (see Table 1 and FIG. 4).

That is, the ball diameters of 0.3, 0.5, 0.
Tip opening diameter 1 for 7, 1.0, 1.6, 2.0 mm
For the six types of ball holders 1 in which f is processed to 80 to 88% of the ball diameter, the first caulking angle θ1 is 90 °, 80
3 types of ° and 70 degrees, and the second caulking angle θ2 is 140 degrees,
Table 1 summarizes the processing specifications for each ball diameter, in which the tip edge 1d was caulked using four types of caulking jigs of 130 °, 120 °, and 100 °. FIG. 4 is a graph showing each numerical value for each ball diameter.

[0018]

[Table 1]

The tip opening diameter 1f of the ball holder 1 is a numerical value determined empirically, and the first caulking angle θ1 and the second caulking angle θ2 are plotted to find the angle at which the grinding allowance is the smallest. Since a jig having an angle close to the caulking jig was used, considering that the numerical values for each ball diameter plotted on the graph of FIG. 4 do not always show the optimum values, the tip opening diameter and the first Therefore, there is regularity between the second caulking angles to obtain the optimum rounded shape.

From the above results, according to the present invention, the tip edge caulking shape of the ball holder 1 used particularly for the ball diameter of 0.3 mm to 1.0 mm is determined by the first caulking angle θ using the caulking jig.
1 to 95 ° to 75 °, and then set the second swaging angle θ2 to 1 so that the tip opening diameter 1f becomes 90 to 75% of the ball diameter.
It is suggested that the film is formed at 45 ° to 115 °.

The ball holder 1 which has been caulked as described above can remarkably shorten the barrel polishing time.
Since the tip edge crimping part 1e can be smoothly rounded without any change in the tip opening diameter 1f related to the holding force of the ball (see FIG. 3), the coating liquid is discharged without reducing the ball holding force. It succeeded in removing the obstacles to the smoothness of. In the experiment, the first caulking and the second caulking were processed separately, but it is of course possible to use a caulking jig that can be processed simultaneously, and it is also possible to observe the degree of freedom of the caulking angle of the experimental product. You can learn from it.

In the coating tip portion of the present invention, the metal ball holder 1 forms the inner wall surface 1g of the tip edge caulking portion into a spherical surface having the same shape as the ball 2 as the coating medium, and the tip is rounded by barrel polishing after caulking. A ball is loaded with a part of the edge 1d exposed to the outside, and a pressing member (coil spring) 4 in contact with the rear end surface of the ball is disposed in the coating liquid flow hole 3 of the ball holder, and the applicator body is provided. Tip hole 5
While being fitted to a, the rear end of the pressing member is held by the pressing member receiving portion 5b of the applicator body, and the ball is brought into contact with the inner wall surface of the caulking portion of the ball holder by a predetermined pressing force. ing.

As the applicator body 5 used in the present invention, a container made of a flexible material is used by adjusting the pressure with fingers (not shown), or a cap fitting for covering the tip of the applicator body. It may be any one (not shown) that pressurizes the inside of the container by the operation at the time of wearing and the pressing member 4 directly presses the ball 2 with the coil spring in the embodiment. An appropriate means may be selected such as interposing a pressing element (not shown) or making one end of the coil spring into a rod shape and contacting it with a ball (not shown).

In the applicator constructed as described above, the ball 2 as the application medium sinks when the tip of the application is pressed against the object to be coated, and the inner wall surface 1g of the ball holder 1 comes into contact with the ball to act as a valve. When the coating pressure is further applied, the holder leading edge 1d contacts the object to be coated. The type in which the applicator body 5 is pressed with fingers to adjust the discharge amount of the coating liquid is applied while pressing the container appropriately, and the pressure type is applied with the tip of the holder in contact with the object to be coated. Apply the coating solution to the area. In this way, the coating liquid applied to the object to be coated is applied in a substantially smooth state without rising more than necessary, so that it can be dried quickly and a beautiful coated surface with few wrinkles on the dried coating surface can be obtained. Is something that can be done.

[0025]

According to the present invention, a metal wire is used for the ball holder at the coating destination, and the coating liquid flow hole is reduced in diameter toward the tip with the rear end opening having the maximum diameter and after the ball is mounted on the ball. Since the inner diameter of the end position is made sufficiently larger than the ball diameter,
Since a sufficient gap can be provided between the coating solution flow hole and the ball pressing member, the tip edge is caulked (especially with two caulking angles), then barrel polished, and the caulking part is rounded. The tip edge does not scratch the surface of the object to be coated, and it is possible to prevent the fibers of the object to be coated and the adhered matter on the surface from being caught in the coating tip part. When used, the effect is remarkably exhibited.

Further, the tip edge is swaged at the two-step swaging angle and then rounded to the swaged portion by barrel polishing, so that the ball holding force can be surely maintained even for a small-diameter ball and the tip edge can be applied to the object to be coated. Since it does not get caught even when pressed, the application liquid is applied to the application part in a substantially smooth state, drying is fast, and there is an effect that a beautiful application surface can be obtained without wrinkling on the application surface after drying. It is a thing.

[Brief description of the drawings]

FIG. 1 is a partially cutaway vertical sectional view of a coating tip portion showing an embodiment of the present invention.

FIG. 2 is an enlarged explanatory view of the caulking shape of the leading edge of the ball holder in FIG.

FIG. 3 is a diagram illustrating the final shape of the tip edge of the ball holder in FIG.

[Fig. 4] Caulking shape of ball holder tip edge Table 1
It is explanatory drawing which made into a graph.

[Explanation of Codes] 1 ball holder 1a rear end opening 1b ball rear end position 1c tip opening 1d tip edge 1e caulking part 1f tip opening diameter 1g caulking inner wall surface 2 ball 3 coating liquid flow hole 4 pressing member 5 applicator Body θ1 1st swaging angle θ2 2nd swaging angle

Claims (2)

[Claims] 1. A ball is used as a coating medium, a part of the ball is exposed to the outside and a sufficient holding force is given to swage the leading edge inward, and the inner wall surface of the swaging portion of the leading edge is used as the ball. The ball holder ( 1 ) is attached to the metal wire rod at the application tip of an applicator, which is formed by arranging a pressing member such as a spring for pressing the ball toward the tip edge of the holder in a metal ball holder formed in the same spherical surface. The rear end opening (1a) is reduced in diameter toward the tip with the maximum diameter, and the inner diameter of the ball rear end position (1b) after mounting the ball (2) is sufficiently larger than the ball diameter. In (1c), a coating liquid flow hole (3) having a diameter slightly larger than the ball diameter is formed, and
The outer diameter of the tip portion was tapered so that the tip edge (1d) had a required thickness, and after the tip edge was caulked inward, the caulked portion (1e) was rounded by barrel polishing. An application tip part of an applicator characterized by the above. 2. A caulking shape of a tip edge (1d) of a ball holder ( 1 ) having a ball diameter of 0.3 mm to 1.0 mm, a first caulking angle (θ1) of 95 ° to 75 °, and then a tip opening diameter. The second caulking angle (θ2) is formed at 145 ° to 115 ° so that (1f) becomes 90 to 75% of the ball diameter, and then the caulking part (1e) is rounded by barrel polishing. The application tip part of the applicator according to claim 1.