JP2021133576A - Applicator - Google Patents

Abstract

To provide an applicator that can appropriately supply the coating liquid without having a pump mechanism.SOLUTION: In an applicator that supplies a coating liquid in a tank to a coating part via a valve, distribution holes 16a and 16b are provided between a valve 12 and a tank 10, and these flow holes have different opening heights of the flow holes on the tank side with respect to a coating portion 14. Further, the flow holes are formed by forming coating liquid flow holes on a coating portion side and forming air replacement holes on an accommodating portion side, and opening each hole in different axial directions.SELECTED DRAWING: Figure 1

Description

The present invention relates to a coating tool for applying a coating liquid containing a writing tool.

Conventionally, when a side knock type pump mechanism is used and the valve body moves backward by knocking the operating portion provided on the side of the shaft body, the valve body opens due to the increase in the internal pressure of the pump mechanism. A coating tool for supplying a coating liquid to the coated body has been proposed (see, for example, Patent Document 1).

Further, by pressing the pen core and moving to the rear end side of the valve stem, the ink passage is closed by the sealing member, and by increasing the ink internal pressure, the sealing member is opened from the opening of the communication hole, and ink is applied to the pen core side. A coating tool to be distributed has been proposed (see, for example, Patent Document 2).

JP-A-2019-107201 Japanese Unexamined Patent Publication No. 2011-173308

However, conventionally, as in Patent Document 1 and Patent Document 2, a coating tool having a pump mechanism but not providing a pump mechanism has been an obstacle to reducing the number of parts.

In view of such circumstances, the present invention aims to provide a coating tool capable of appropriately supplying a coating liquid without having a pump mechanism.

The present invention is a coating tool that supplies a coating liquid in a tank to a coating portion via a valve.
A coating tool characterized in that a flow hole is provided between the valve and the tank, and these flow holes have different opening heights of the flow holes on the tank side with respect to the coating portion.

In the present invention, it is preferable that the opening of the flow hole is provided at a position located on the tank side of the liquid shutoff point of the valve.

In the present invention, a plurality of the flow holes are provided, a coating liquid flow hole is formed on the coating portion side, and an air replacement hole is formed on the accommodating portion side, and each hole is formed by opening in different axial directions. Suitable.

In the present invention, the coating liquid flow hole and the air replacement hole are preferably ^{zx 2} > 100 when the separation distance is x (mm) and the opening area of the air replacement hole is z (mm ² ). Is.

In the present invention, it is preferable that the valve is provided with a closing member capable of blocking the coating liquid flow path by pressing from the outside to the inside between the tank and the coating portion. ..

In the present invention, it is preferable that the valve has a structure that shuts off the flow path by rotating the inner shaft with respect to the outer shaft.

In the present invention, the coating liquid preferably has a viscosity of 1 to 100 (mPa · s).

According to the coating tool of the present invention, in the coating tool that supplies the coating liquid in the tank to the coating portion via the valve, a plurality of flow holes are provided between the valve and the tank, and the plurality of flow holes are formed. Since the opening heights of the flow holes on the tank side with respect to the coating portion are different, when the coating liquid flows during use, the coating liquid is applied from the openings on the coating portion side due to the difference in the opening heights of the plurality of flow holes. Since the air flows to the portion side and the air is replaced from the opening on the tank side, it is possible to achieve an excellent effect that smooth air replacement is possible when the coating liquid is supplied.

It is explanatory drawing of the coating tool which concerns on 1st Embodiment, (a) is one side view, (b) is the vertical sectional view along line BB of (c), (c) is (a) to 90 ° A side view in a state of being rotated in the circumferential direction, (d) is a vertical cross-sectional view taken along the DD line of (a). It is an enlarged perspective view of the part C of (a) in the coating tool of FIG. FIG. 1 is a component diagram in which a joint, a passage body, a tubular passage, and an interior body in the coating tool of FIG. 1 are assembled. (C) is a side view, (d) is a rear view, (e) is a perspective view from the rear, (f) is a vertical sectional view along the FF line of (c), (g). ) Is a perspective view from the front, and (h) is a side view in a state of being rotated by 90 ° in the circumferential direction from (c). It is explanatory drawing of the operation of the valve in the coating tool of FIG. It is a diagram explaining the theoretical air substitution possibility and the result of the experimental air substitution between the comparative example of the coating tool which concerns on an Example, and the Example. It is explanatory drawing of the valve closed state of the coating tool which concerns on 2nd Embodiment, (a) is one side view, (b) is a vertical sectional view along line BB of (a), (c) is It is a vertical cross-sectional view of the state rotated by 90 ° in the circumferential direction from (b). It is explanatory drawing of the valve open state of the coating tool which concerns on 2nd Embodiment, (a) is one side view, (b) is a vertical sectional view along line BB of (a), (c) is It is a vertical cross-sectional view of the state rotated by 90 ° in the circumferential direction from (b). It is explanatory drawing of the inner shaft (valve body) of the coating tool which concerns on 2nd Embodiment, (a) is a perspective view from the rear, (b) is a side view, (c) is a perspective view from the front. (D) is a vertical cross-sectional view along the DD line of (f), (e) is a rear view, (f) is a side view rotated 90 ° from (b), (g). ) Is a perspective view from the front, (h) is a perspective view from the rear rotated by 180 ° in the circumferential direction from (a), and (i) is a vertical cross-sectional view along the I-I line of (b). It is explanatory drawing of the outer shaft (valve seat body) of the coating tool which concerns on 2nd Embodiment, (a) is a perspective view from the front, (b) is a side view, (c) is a view from the front. (D) is a vertical cross-sectional view taken along the line DD of (c).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 5 are explanatory views of the coating tool according to the first embodiment.

As shown in FIG. 1, there are two coating tools between the valve 12 and the tank (outer shaft) 10 in the coating tool that supplies the coating liquid in the tank 10 to the coating unit 14 via the valve 12. Flow holes 16a and 16b (examples of a plurality of flow holes) are provided, and these flow holes 16a and 16b have openings 16a1 and 16b1 on the tank 10 side with respect to the coating portion 14 having different heights.

The openings 16a1 and 16b1 of the two flow holes 16a and 16b are provided at locations located closer to the tank 10 than the cutoff portion 12a of the coating liquid of the valve 12.

A specific configuration will be described.
[Tank 10]
The tank 10 constitutes an outer shaft for the user of the coating tool to grip.
The tank 10 is a shaft cylinder with a closed rear end, and is made of a resin body whose internal space is a storage space 10a for a coating liquid.

In the front part of the tank 10, a joint 18 for connecting the valve 12, a passage body 20 formed with openings 16a1 and 16b1 of the flow holes 16a and 16b, a tubular passage 12b of the valve 12, and an interior of the toe shaft 22 are provided. The body 22a and the body 22a are continuously arranged.

The coating liquid preferably contains a coating liquid having a viscosity measured at 10 rpm by a rotational viscometer at 25 ° C. of 1 to 100 mPa · s. If the ink viscosity is less than 1.0 mPa · s, it is very difficult to mix, and even if it can be mixed, the drawing dryness is deteriorated, which is not preferable. On the other hand, it is larger than 100 mPa · s. This is not preferable because the ink flow rate is low and the writing quality is poor.
As the coating liquid, 5 to 50 mN / m (measurement temperature: 25 ° C., measuring instrument: surface tension measuring instrument manufactured by Kyowa Interface Science Co., Ltd.) is desirable. If the surface tension is less than 5 mN / m, a direct current phenomenon is likely to occur, and the pigment is likely to settle or aggregate. On the other hand, if it exceeds 50 mN / m, the amount of ink outflow becomes unstable depending on the storage environment and the writing state, and the density and width of drawn lines tend to vary, which is not preferable. Further, the coating liquid to be used is preferably a combination of at least a colorant, a dispersant, a fixing resin, a wetting agent, and water. Further, it is preferable that the ink flow rate of the writing instrument is 50 to 400 mg / 2.5 m at a writing speed of 70 ° and 10 m / min at a writing angle of 70 ° under a load of 100 g.

To describe the details of the ink composition mentioned here, the colorant is titanium oxide particles, zinc sulfide particles, zinc oxide particles, barium sulfate particles, aluminum powder, pearl pigment, and particles obtained by combining these particles, which have a hiding effect. It is preferable to use particles selected from the above, or dispersions of these particles having a particle diameter of 40 nm to 100 μm. The "particle size" in each of the above colorants means the primary particle size. The total solid content of the ink composition is preferably 1 to 50% by mass, preferably 2 to 35% by mass, based on the total amount of the ink composition. If the total content of the hiding agent is less than 1% by mass, sufficient hiding power cannot be exhibited, and it is difficult to obtain a uniform density drawing line. On the other hand, if it exceeds 50% by mass, the ink viscosity increases. This is not preferable because the sedimentation volume of the particles increases.

The dispersant and the fixing resin preferably contain a water-soluble resin. Examples of the water-soluble resin include polyacrylic acid, water-soluble styrene-acrylic resin, water-soluble styrene / maleic acid resin, polyvinyl alcohol, polyvinylpyrrolidone, water-soluble maleic acid resin, water-soluble styrene resin, polyvinylpyrrolidone, and polyvinylalco-. Water-soluble resin having a hydrophobic part in the molecule such as water-soluble ester-acrylic resin, ethylene-maleic acid copolymer, polyethylene oxide, water-soluble urethane resin, acrylic emulsion, vinyl acetate emulsion, styrene-based At least one selected from resin emulsions such as emulsions, styrene-butadiene emulsions, and styrene acrylonitrile emulsions can be mentioned, and the above-mentioned is preferable from the viewpoints of dispersibility of the hiding agent and pigment, viscosity adjustment, and improvement of adhesive force. It is desirable to use one or more of each of the water-soluble resin and the resin emulsion, for a total of two or more. The content of these water-soluble resins is preferably 1 to 20% by mass with respect to the total amount of the ink composition. If the content of the water-soluble resin is less than 1% by mass, it becomes difficult to secure dispersibility and adhesiveness, while if it exceeds 20% by mass, the viscosity becomes high and the followability of the ink deteriorates, which is not preferable. ..

Wetting agents include, for example, sorbitan fatty acid ester, glycerin fatty acid ester, decaglycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, Polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil, polyoxyethylene lanolin, lanolin, alcohol, beeswax derivative, polyoxyethylene alkylamine, fatty acid amide, etc. Nonionic surfactant;, alkyl sulfate, polyoxyethylene alkyl ether sulfate, N-acyl amino acid salt, N-acylmethyl taurine salt, polyoxyethylene alkyl ether acetate, α-olefin sulfonate, alkyl phosphorus Anionic surfactants such as acid salts, polyoxyethylene alkyl ether phosphates; perfluoroalkylethylene oxide adducts, perfluoroalkyltrimethylammonium salts, perfluoroalkylcarboxylates, fluorinated alkyl esters, perfluoro Alkyl sulfonate, perfluoroalkyl group hydrophilic group-containing oligomer, perfluoroalkyl group hydrophilic group-containing urethane, perfluoroalkyl phosphate ester, perfluoroalkyl betaine, perfluoroalkylamine oxide, perfluoroalkylammonium salt, per Fluorine-based surfactants such as fluoroalkyl alkoxylate and perfluoroalkyl polyoxyethylene ethanol can be mentioned. These surfactants can be used alone or in admixture of two or more.

FIG. 3 is an explanatory view of a state in which the joint 18, the passage body 20, the tubular passage 12b, and the interior body 22a are assembled.

[Joint 18]
As shown in FIGS. 1 and 3, the joint 18 is formed with a front end opening 18a connected to the tubular passage 12b of the valve 12 at the front end and an opening 18b connected to the space inside the tank 10 at the rear end. On the outer circumference of the joint 18, a flange 18c for positioning that abuts on the front end of the tank 10 and an uneven portion 18d are formed on the outer peripheral surface behind the flange 18c to fit and fix the inner circumference of the front end of the tank 10. Reference numeral 18e is a locking portion for locking the opening / closing metal fitting 24.

[Passage body 20]
A passage body 20 is mounted in the tank 10. The passage body 20 has a large-diameter tubular body in which the front portion 20f is opened forward, a small-diameter tubular shape in the rear portion 20r, and a substantially tubular body in which the rear end is closed. Flow holes 16a and 16b (shown by broken lines in FIG. 1) are passages leading from the internal space continuing from the front portion 20f to the inside of the tank 10 through the openings 16a1 and 16b1 of the side surface portions of the rear portion 20r.

The front portion 20f of the passage body 20 is fixed to the inner peripheral portion of the joint 18. There is a space between the outer peripheral surface of the rear portion 20r and the inner peripheral surface of the joint 18, and this space becomes the tank 10 side portion of the flow holes 16a and 16b through the openings 16a1 and 16b1 of the passage body 20.

The heights of the openings 16a1 and 16b1 are such that the opening 16a1 is low and the opening 16b1 is high when the coating portion 14 is directed downward.

The flow hole 16a (coating liquid flow hole) and the flow hole 16b (air replacement hole) are preferably separated from each other by x (mm) and the area of the opening (16b1) of the air replacement hole is z (mm ² ). When, zx ² > 100. More preferably, zx ² > 300. As an example of the dimensions, preferably, x is 1 to 10 (mm) and z is 0.8 to 30 (mm ² ).

[Valve 12, tubular passage 12b, opening / closing metal fitting 24, etc.]
The valve 12 has a closing member (opening / closing metal fitting 24) between the tank 10 and the coating portion 14 that can block the coating liquid flow path (tubular passage 12b) by pressing from the outside to the inside. It is provided.

The tubular passage 12b of the valve 12 is a flexible resin-made pipe line having a rectangular cross section, and an opening / closing metal fitting 24 made of an elastic body is arranged on the outer peripheral portion. As shown in FIG. 2, the opening / closing metal fitting 24 has a substantially M-shaped shape, and the central portion of the substantially M-shape is locked and supported by the locking portion 18e at the front end of the joint 18.
When the opening / closing metal fitting is not operated, the lower portion 24a sandwiches and shuts off the blocking portion 12a of the tubular passage 12b. On the other hand, by pinching the upper portion 24b of the opening / closing metal fitting 24 and pressing it in the F direction, the blocking portion 12a of the tubular passage 12b can be opened.

The opening / closing metal fitting 24 can be easily and inexpensively formed by bending an elastic wire such as metal. Therefore, the valve mechanism is not complicated and the length in the axial direction cannot be obtained, so that a compact configuration can be obtained.

[Front shaft 22 and interior body 22a]
As shown in FIG. 1, the interior body 22a constitutes a substantially tubular body, and the rear portion of the coating portion 14 is mounted in the front portion. The interior body 22a is covered with a toe shaft 22.

[Applying portion 14]
In the coating portion 14, the flange portion 14a has an enlarged diameter at the rear end of the coating portion 14. The flange portion 14a is locked to the portion where the tip portion of the front shaft 22 has a stepped small diameter, so that the coating portion 14 is prevented from coming off forward with respect to the front shaft 22.

In the coating portion 14, the coating liquid guide core 26 is inserted in the center of the rear end portion, and the coating liquid storage portion 28 is arranged around the coating liquid guide core 26.

The coating portion 14 has a tapered brush tip shape and is preferably easily bent by the writing pressure at the time of writing. It can be made of various materials such as artificial and natural materials.

[Coating liquid guide core 26, coating liquid reservoir 28]
The coating liquid guide core 26 can be made of the same material as or different from that of the coating portion 14, and is made of various materials such as a resin molded body, a porous resin body, and other artificial materials and natural materials. It is preferably made of a material. The coating liquid storage unit 28 can be a porous body capable of storing the coating liquid.

The operation of the coating tool according to the first embodiment will be described.
According to this coating tool, the two flow holes 16a and 16b have different heights of the flow hole openings 16a1 and 16b1 on the tank 10 side with respect to the coating portion 14. The opening / closing metal fitting 24 of the valve 12 is closed by sandwiching the shutoff portion 12a in the unoperated state.

When using the coating tool, when supplying the coating liquid of the coating portion 14, the upper portions 24b and 24b of the opening / closing metal fitting 24 of the valve 12 are pinched and pressed by fingers (in the direction of arrow F in FIG. 2), and the tubular passage 12b is used. The blocking point 12a of the coating liquid of is opened.
At this time, the coating liquid in the tank 10 tries to flow, but due to the difference in height between the two openings 16a1 and 16b1, the coating liquid flows from the tank to the coating portion 14 side from the opening 16a1 on the coating portion 14 side (FIG. 1). The flow hole 16a) shown by the broken line, and air flows from the opening 16b1 on the tank 10 side to the tank side (the flow hole 16b shown by the alternate long and short dash line in FIG. 1) to replace the air.
Further, when the force on the opening / closing metal fitting 24 is released, the opening / closing metal fitting 24 is about to be deformed and the blocking portion 12a is closed. By repeating this opening and closing, it is possible to smoothly supply the coating liquid and replace the air with the coating portion 14.
Therefore, the valve 12 operates to open and close the liquid shutoff portion of the tubular passage 12b, enabling smooth liquid supply.

The coating tool of the embodiment has a structure in which the valve opening operation is performed in the middle of the ink flow path without changing the volume, unlike the normal valve opening operation in which the valve is pushed into the tank side. Normally, if there is no volume change, the coating liquid does not flow out without replacing air at the valve portion, but in the coating tool of the embodiment, the flow path (flow holes 16a, 16b) that imparts a height difference between the valve 12 and the tank 10 is provided. ) Is provided to allow the coating liquid to flow out.

FIG. 4 is an enlarged view of the periphery of the valve 12.

As shown in FIGS. 1 and 4, the valve 12 is formed with an opening 16a1 of a flow hole 16a for a coating liquid on the coating portion 14 side, and an opening 16b1 for a flow hole 16b serving as an air replacement hole on the tank 10 side. The openings 16a1 and 16b1 are formed, and the directions (positions) of the openings 16a1 and 16b1 are oriented in different directions with respect to the axis.

Further, the embodiment is also included in the embodiment in which the opening directions are oriented in the same direction with respect to the axes of the openings 16a1 and 16b1. When opened in the same direction, as shown in FIG. 4, the opening 16a1'(indicated by a broken line) of the flow hole 16a and the opening 16b1 of the flow hole 16b are formed in the same direction.

Here, in the coating tool according to the embodiment, FIG. 5 shows the experimental results of the comparative example and the example.

As the coating liquid, writing instrument ink (total 100% by mass) having the following composition was used.
Colorant: Titanium oxide 30% by mass
Dispersant and fixing agent: Styrene acrylic resin 10% by mass
Wetting agent: Fluorine-based surfactant 0.01% by mass
Water (solvent): Ion-exchanged water residual viscosity (25 ° C, 10 rpm, rotational viscometer (TV-20, manufactured by TOKIMEC): 5.8 mPa · s
Surface tension: 24 mN / m (Measurement temperature: 25 ° C, Measuring instrument: Surface tension measuring instrument manufactured by Kyowa Interface Science Co., Ltd.)

[Comparative Example 1]
Separation distance between openings 16a1 and 16b1 (holes): 0 [mm]
Hole shape: Circular hole diameter of air replacement part (opening 16b1): 2 [mm]
Air replacement hole area: 3.1 [mm ² ]
zx ² = 0
Experimental result: Air replacement was not possible (×)

[Comparative Example 2]
Separation distance between openings 16a1 and 16b1 (holes): 0 [mm]
Hole shape: Circular hole diameter of air replacement part: 2.5 [mm]
Air replacement hole area: 4.9 [mm ² ]
zx ² = 0
Experimental result: Air replacement was not possible (×)

[Comparative Example 3]
Separation distance between openings 16a1 and 16b1 (holes): 5 [mm]
Hole shape: Circular hole diameter of air replacement part: 2 [mm]
Air replacement hole area: 3.1 [mm ² ]
zx ² = 79
Experimental result: Air replacement was not possible (×)

[Example 1]
Separation distance between openings 16a1 and 16b1 (holes): 5 [mm]
Hole shape: Circular hole diameter of air replacement part: 2.5 [mm]
Air replacement hole area: 4.9 [mm ² ]
zx ² = 123
Experimental result: Air replacement was possible (〇)

[Example 2]
Separation distance between openings 16a1 and 16b1 (holes): 5 [mm]
Hole shape: Circular hole diameter of air replacement part: 3 [mm]
Air replacement hole area: 7.1 [mm ² ]
zx ² = 177
Experimental result: Air replacement was possible (〇)

[Example 3]
Separation distance between openings 16a1 and 16b1 (holes): 10 [mm]
Hole shape: Circular hole diameter of air replacement part: 2 [mm]
Air replacement hole area: 3.1 [mm ² ]
zx ² = 314
Experimental result: Air replacement was possible (〇)

[Example 4]
Separation distance between openings 16a1 and 16b1 (holes): 10 [mm]
Hole shape: Circular hole diameter of air replacement part: 2.5 [mm]
Air replacement hole area: 4.9 [mm ² ]
zx ² = 491
Experimental result: Air replacement was possible (〇)

[Comparative Example 4]
Separation distance between openings (holes): 5 mm
Hole shape: Square Pore diameter of air replacement part: 1.5 x 1.5 [mm]
Air replacement hole area: 2.3 [mm ² ]
zx ² = 56
Experimental result: Air replacement was not possible (×)

[Example 5]
Separation distance between openings (holes): 5 [mm]
Hole shape: Square Pore diameter of air replacement part: 2.5 x 2.5 [mm]
Air replacement hole area: 6.3 [mm ² ]
zx ² = 156
Experimental result: Air replacement was possible (〇)

As described above, it was difficult to replace the air in the comparative example, but in the example, the air could be replaced and the coating liquid could be smoothly supplied.

Next, the coating tool according to the second embodiment will be described.

FIG. 6 shows a closed state of the valve of this applicator. FIG. 7 shows the valve 34 in the open state. FIG. 8 shows a component diagram of the inner shaft 32. FIG. 9 shows a component diagram of the outer shaft 30.

The applicator of the second embodiment has a valve 34 (see FIG. 6) and is different from the valve 12 of the applicator of the first embodiment (see FIG. 1). As shown in FIG. 6, the outer shaft 30 of the axle cylinder serves as a tank (accommodating portion 30a) for accommodating the coating liquid from the central portion to the rear portion, and the valve 34 is combined with the inner shaft 32 mounted in the front portion 30b of the outer shaft 30. To configure. The same reference numerals are given to the same parts as in the other first embodiments.

The valve 34 has a structure that shuts off two flow holes 32a and 32b (examples of a plurality of flow holes, see FIG. 7) by rotating the inner shaft 32 with respect to the outer shaft 30.

Specifically, as shown in FIGS. 6 and 9, the front portion 30b of the outer shaft 30 is formed to have a diameter larger than that of the central portion, and paired ribs 30c and 30c are formed so as to protrude inward. The space between 30c and 30c is a liquid passage connecting to the accommodating portion 30a side. As shown in FIG. 9, a concavo-convex portion 30d is formed adjacent to the rear of the ribs 30c and 30c.

As shown in FIG. 8, the rear end of the inner shaft 32 is closed, and the front opening 32a1 (flow hole 32a) and the rear opening 32b1 (flow hole 32b) are provided at a distance from the side surface of the rear 32r. It is formed. In the closed state of FIG. 6, the flow holes 32a and 32b are closed, and in the open state of FIG. 7, the flow holes 32a (indicated by the broken line) and 32b (indicated by the alternate long and short dash line) can be distributed.

A pair of wall portions 32e extend rearward from the closed rear end surface of the rear portion 32r of the inner shaft 32. As shown in FIG. 8, a convex portion 32e1 is formed on the peripheral surface of the outer peripheral surface of the wall portion 32e, and the convex portion 32e1 is fitted to the uneven portion 30d of the inner peripheral portion of the outer shaft 30. doing. As a result, the inner shaft 32 is rotatable with respect to the outer shaft 30 and its movement in the axial direction is restricted so as to prevent it from coming off (see FIG. 6).

As shown in FIGS. 6 to 8, the pair of wall portions 32e and 32e are spaced apart from each other in the circumferential direction, and the portions of the pair of wall portions 32e and 32e are formed at the same circumferential positions as the openings 32a1 and 32b1. Has been done. The coating liquid in the accommodating portion (tank) 30a of the outer shaft 30 flows from the space between the wall portions 32e and 32e around the inner shaft 32.

A flange 32c is formed on the outer peripheral surface of the front portion 32f of the inner shaft 32 with an enlarged diameter. The outer peripheral surface of the flange 32c has a stepped diameter reduction at the rear portion, and a recess is formed. A seal body 36a made of an elastic resin body is housed in a recess on the outer peripheral surface of the rear portion whose diameter has been reduced. Further, a concave portion is formed in an annular shape around each of the openings 32a1 and 32b1, and an annular sealing body 36b is fitted in the concave portion to maintain liquidtightness.

When the inner shaft 32 is mounted in the outer shaft 30 (see FIGS. 6 to 7), the inner shaft 32 is rotatable and rotatable with respect to the front portion 30b of the outer shaft 30 by the seal bodies 36a and 36b. , Liquid-tightly in contact with each other.

As shown in FIG. 6, a leading shaft 38 covering the coating portion 14 is fitted on the outer circumference of the front portion 32f of the inner shaft 32, and the stepped portion on the inner surface of the leading shaft 38 and the front end portion of the inner shaft 32 are used. The flange portion 14a of the coating portion 14 is sandwiched to prevent it from coming off.

The front shaft 38 is fitted to the inner shaft 32 to regulate relative rotation in the rotation direction. When the user grips the front shaft 38 with one hand and the outer shaft 30 with the other hand and rotates the front shaft 38 and the outer shaft 30 relative to each other, the sliding contact point of the outer shaft 30 of the inner shaft 32 The structure is such that the valve can be opened and closed by changing.
When the front shaft 38 and the outer shaft 30 are relatively rotated, the state shown in FIG. 6 is obtained when the valve 34 is closed, and the state shown in FIG. 7 is obtained when the valve 34 is opened.

[When the valve 34 is closed]
When the valve 34 is closed, as shown in FIG. 6, the ribs 30c and 30c in the front portion 30b of the outer shaft 30 face the openings 32a1 and 32b1 and come into contact with each other to be in a closed state. At that time, the coating liquid in the accommodating portion 30a flows into the space 40 around the inner shaft 32 from the gap between the wall portions 32e and 32e. However, since the openings 32a1 and 32b1 are closed, the flow holes 32a and the flow holes 32b (see FIG. 7) are not formed.

[When the valve 34 is opened]
When the valve 34 is opened, as shown in FIG. 7, the ribs 30c and 30c in the front portion 30b of the outer shaft 30 are in a state of communicating with the openings 32a1 and 32b1 facing the space 40. The coating liquid flows from the opening 32a1 on the coating portion 14 side to the coating portion 14 side (flow hole 32a shown by the broken line in FIG. 7), and air flows from the opening 32b1 on the accommodating portion 30a side to the accommodating portion 30a side (FIG. 7). Flow hole 32b) shown by the alternate long and short dash line in 7) Air replacement.

As described above, in the coating tool according to the second embodiment, in the coating tool that supplies the coating liquid in the accommodating portion (tank) 30a to the coating portion 14 via the valve 34, from the valve 34 to the accommodating portion 30a. Two flow holes 32a and 32b are provided between them (plural examples), and these flow holes 32a and 32b have different heights of the openings 32a1 and 32b1 of the flow holes 32a and 32b on the accommodating portion 30a side with respect to the coating portion 14. Become.

Therefore, when the coating liquid flows during use, the coating liquid flows from the opening 32a1 on the coating portion side to the coating portion 14 side due to the difference in height between the openings 32a1 and 32b1 of the flow holes 32a and 32b, and also on the accommodating portion 30a side. Since the air is replaced from the opening 32b1 of the above, smooth air replacement is possible when the coating liquid is supplied.
Further, normally, if there is no volume change, the coating liquid does not flow out without replacing air at the valve portion, but in the coating tool of the embodiment, a flow path that imparts a height difference between the valve 12 and the accommodating portion 30a ( By providing the openings 32a1, 32b1) of the flow holes 32a and 32b, the coating liquid can flow out.

The present invention is not limited to the embodiment, and three or more flow holes may be formed. Further, the flow hole may be connected to the air replacement hole.

The coating tool of the present invention can be used as a writing tool.

10 Tank 12 Valve 12a Blocking point 12b Tubular passage 14 Coating part 14a Flange part 16a Flow hole (for coating liquid)
16a1 Opening 16b Flow hole (for air replacement)
16b1 Opening 18 Joint 18a Front end opening 18b Opening 18c Flange 18d Concavo-convex part 20 Passage body 20f Front part 20r Rear part 22 Front shaft 22a Interior body 24 Opening and closing metal fittings 24a Lower part 24b Upper part 26 Coating liquid guide core 28 Coating liquid reservoir 30 Outer shaft 30a Storage unit (tank)
30b Front part 30c Rib 30d Concavo-convex part 32 Inner shaft 32a Flow hole 32a1 Opening 32b Flow hole 32b1 Opening 32c Flange 32e Wall part 32e1 Convex part 32f Front part 32r Rear part 34 Valve 36a Seal body 34 Valve (second embodiment)
36b Seal body 38 Lead shaft 40 Space

Claims (7)

In a coating tool that supplies the coating liquid in the tank to the coating section via a valve,
A coating tool characterized in that a flow hole is provided between the valve and the tank, and these flow holes have different opening heights of the flow hole on the tank side with respect to the coating portion. The coating tool according to claim 1, wherein the opening of the flow hole is provided at a position located on the tank side of the liquid blocking point of the valve. The claim is characterized in that a plurality of the flow holes are provided, a coating liquid flow hole is formed on the coating portion side, an air replacement hole is formed on the accommodating portion side, and each hole is opened in different axial directions. Item 2. The coating tool according to Item 1 or 2. ^{A claim that the coating liquid flow hole and the air replacement hole are zx 2} > 100 when the separation distance is x (mm) and the opening area of the air replacement hole is z (mm ² ). The coating tool according to 3. From claim 1, the valve is provided with a closing member capable of blocking the coating liquid flow path by pressing from the outside to the inside between the tank and the coating portion. The coating tool according to item 1 of 4. The coating tool according to claim 1, wherein the valve has a structure for blocking the flow path by rotating the inner shaft with respect to the outer shaft. The coating tool according to claim 1, wherein the coating liquid has a viscosity of 1 to 100 (mPa · s).

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