JP2009220330A - Valve device for liquid applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve for a liquid applicator by which the disadvantage that an applicator body is partially stained before initial use even though the strength shortage of a coil spring, molding error of a valve portion, and a valve seat portion are generated. <P>SOLUTION: A lid body 5 which opens by pressing and contacting by a rear end of a valve rod 2 at the first time of pushing and pressing the applicator body is suitable for the bottom portion of a tubular body 1 such that airtightness inside of the tubular body 1 is kept. Accordingly, the application liquid does not flow into the tubular body 1 until the lid body 5 opens by pressing and contacting by the rear end of the valve rod 2 at the first time of pushing and pressing the applicator body. Further, an auxiliary application liquid flowing-in opening can be arranged in the bottom portion of the tubular body 1 separatedly from the application liquid flowing-in opening. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a valve device for a liquid applicator used for a marking pen.

Patent Document 1 is a pen core knock type writing instrument valve disclosed by the applicant of the present application, but since the valve flows into the cylindrical main body before use, not only after the first use, From the time of product manufacture to the time of first use, the interior of the cylindrical main body and the ink outflow hole are designed to be kept airtight by utilizing the elastic force of the coil spring.
Patent Document 2 discloses a valved applicator in which the coating liquid does not flow into the sub chamber until the first use. When the valve-equipped applicator is not in use, the coating liquid does not flow into the sub chamber, and when used for the first time, the inner plug is detached from the opening due to the pressing force at the rear end of the coated body, and the coating liquid flows into the sub chamber. Designed to be possible.
Japanese Utility Model Publication No. 06-50231 No. 01-16540

However, since the valve of Patent Document 1 is designed to take airtightness between the inside of the cylindrical main body and the ink outflow hole only at one place of the valve portion and the valve seat portion, the strength of the coil spring is insufficient, Due to molding errors of the valve part and the valve seat part, ink leaked into the ink outflow hole before the first use, and the pen core was partially dyed. In addition, even if the product is in accordance with the design specifications, there was a problem that the ink leaked out to the ink outflow hole before the first use due to an impact caused by dropping or an air pressure difference caused by air transportation, and the pen core was partially dyed.
The applicator with a valve of Patent Document 2 is an applicator in which the coating liquid does not flow into the sub chamber until the first use, but includes a portion where the inner plug is press-fitted and an opening through which the coating liquid flows (inflow of the coating liquid) Since the hole) is the same, an auxiliary opening (auxiliary application liquid inflow hole) cannot be provided separately from the opening (application liquid inflow hole). Therefore, depending on the type of coating liquid, if the size of the opening is changed, the size of the inner plug must be changed accordingly, and since there is only one opening in the first place, the flow rate of the coating liquid is of course In other words, it was extremely difficult to finely adjust the flow path of the coating liquid flowing into the sub chamber.

A valve device for a liquid applicator according to a first aspect of the present invention, which has been completed to solve the above-mentioned problems, has a cylindrical main body having a coating liquid inflow hole in the center of the bottom and a coating liquid outflow hole in the lid. A valve stem provided in the middle with a valve portion corresponding to the valve seat portion formed at the base of the coating liquid outflow hole, and a coil spring surrounded by the valve stem and resiliently projecting the valve portion toward the valve seat portion The supply of the coating liquid to the coating body inserted into the coating body holder that is fitted to the tip of the tube shaft and is normally attached to the tip of the tube shaft is prevented by the contact between the valve portion and the valve seat portion. However, it is a valve device for a liquid applicator that is capable of supplying the application liquid to the application body by separating the valve portion from the valve seat portion when the valve rod is pushed by the application pressure during application. When the body is pressed, the plug body which is opened by pressure contact with the rear end of the valve rod is kept airtight in the cylindrical main body. Sea urchin, characterized in that fitted on the bottom of the cylindrical main body.
The valve device for a liquid applicator according to a second aspect of the present invention is characterized in that an auxiliary coating liquid inflow hole is provided separately from the coating liquid inflow hole at the bottom of the cylindrical main body. It is the valve apparatus of a liquid applicator.
The valve device for a liquid applicator according to a third aspect of the present invention is characterized in that the plug body covers an auxiliary coating liquid inflow hole disposed in the intermediate body wall of the cylindrical main body. It is the valve apparatus of the liquid applicator of invention of 2 or 2nd invention.

In the present invention, at the first press of the application body, the application liquid cannot flow into the cylindrical main body until the plug body is opened by pressure contact with the rear end of the valve rod. Therefore, even if the strength of the coil spring is insufficient or molding errors of the valve portion and the valve seat portion occur, there is no problem that the application body is partially stained before the first use. In addition, even if the product conforms to the design specifications, there is no problem that the coating liquid leaks out to the coating liquid outflow hole before the first use due to impact by dropping or air pressure difference due to air transportation, etc., and the coated body is partially dyed. . And after opening a plug body by the first application body press, it can be used similarly to the conventional application body press type applicator.
Further, since the plug is fitted so as to cover the bottom of the cylindrical main body, an auxiliary coating liquid inflow hole can be provided in the bottom separately from the coating liquid inflow hole provided in the bottom, The amount of the coating liquid flowing into the cylindrical main body can be finely adjusted. Here, the term “fitting” means fitting to be put on.
Further, in order to finely adjust the amount of the coating liquid flowing into the cylindrical main body, the auxiliary coating liquid inflow hole is provided not only at the bottom of the cylindrical main body but also at the intermediate body wall of the cylindrical main body. In this case, since the plug can be fitted with the plug body, the coating liquid flows into the cylindrical main body until the plug body is opened by pressure contact with the rear end of the valve rod when the application body is pressed for the first time. Can not. Therefore, even if the strength of the coil spring is insufficient or molding errors of the valve portion and the valve seat portion occur, there is no problem that the application body is partially stained before the first use.

Next, a first embodiment of the present invention will be described in detail with reference to FIGS. Here, in the present invention, “front” refers to the application body 8 side, and “rear” and “bottom” refer to the tube shaft 6 side.
The cylindrical main body 1 has a substantially cylindrical shape, and is configured by fitting a plug-like lid portion 3 into a front end opening of a cylindrical body provided with a coating liquid inflow hole 12 at the center of the bottom. A coating liquid outflow hole 32 having a base portion formed in the valve seat portion 31 is provided in the center of the lid portion 3. A valve stem 2 is incorporated in the cylindrical main body 1. The central axis of the cylinder of the cylindrical main body 1 is in common with the valve axis that is the central axis of the valve stem 2.

  The valve stem 2 includes a valve portion 21 corresponding to the valve seat portion 31 in the middle, and the valve stem front portion 22, which is the front end of the valve stem 2, projects outward from the coating liquid outflow hole 32. The rear end 23 of the valve stem, which is the rear end thereof, is incorporated in the cylindrical main body 1 so as to be positioned at least in the coating liquid inflow hole 12. The valve stem 2 is slidably inserted into the coating liquid inflow hole 12 of the cylindrical main body 1 and is guided by the coating liquid inflow hole 12 so as to be movable in the front-rear direction.

  The coil spring 4 has one end surrounded by the valve portion 21 disposed on the valve stem 2 and the other end abutted against the bottom inner wall surface of the cylindrical main body 1. The elastic force of the spring 4 propagates to the valve portion 21 and normally presses the valve portion 21 against the valve seat portion 31. It should be noted that a locking portion such as a recess that locks both ends of the coil spring 4 is provided on the inner wall surface of the bottom of the cylindrical main body 1 and the rear end surface of the valve portion 21 that faces the bottom wall. This is preferable because it is possible to prevent rattling of the spring 4 and increase the efficiency of the assembly work.

  The plug body 5 is fitted on the cylindrical main body 1 so as to cover the bottom of the cylindrical main body 1. The plug body 5 is a bottomed cylinder, and the plug body 5 and the cylindrical main body 1 are airtightly fitted so that the coating liquid does not flow into the cylindrical main body 11. The place to be fitted and the place to be airtight may be the same or different places. For example, the inner peripheral surface 52 of the plug 5 and the substantially rear end outer peripheral surface 13 of the cylindrical main body 1 are tightly fitted, or the inner bottom of the plug 5 and the cylindrical main bottom are hermetically fitted. Or after sealing the inner bottom surface of the plug body 5 and the bottom of the cylindrical main body, the inner peripheral surface 52 of the plug body 5 and the outer peripheral surface of the substantially rear end of the cylindrical main body 1 body wall For example, it is possible to adopt only fitting with 13. Here, press fitting, uneven fitting, or the like can be appropriately employed as a fitting method.

In order to make the airtight fitting more reliable, an airtight seal material 10 such as an O-ring (O-ring) can be used. The O-ring is an O-shaped (circular) annular sealing member having a cross section of nitrile rubber (NBR), fluorine rubber, silicone rubber, ethylene propylene rubber (EPDM), chloroprene rubber (CR), acrylic rubber, Urethane rubber or the like can be used. In order to ensure airtightness between the cylindrical main body 1 rear end outer peripheral surface 13 and the plug inner peripheral surface 52, a groove is provided in the cylindrical main body 1 rear end outer peripheral surface 13, and an O-ring is attached to the groove. By appropriately compressing the peripheral surface 52 inside the plug, the inflow of the coating liquid can be prevented. Of course, the O-ring may be attached to the peripheral surface 52 of the stopper.
In addition, the O-ring may be attached to either the bottom surface of the plug 5 or the bottom of the cylindrical main body 1 to prevent the coating liquid from flowing in.

Here, plastics made of synthetic resin can be used for the material of the cylindrical main body 1, the valve stem 2, the lid portion 3, and the plug body 5. The shape of the plug body 5 is not particularly limited as long as it can fit the cylindrical main body 1, and not only the cylinder body as described above but also the bottom surface may have a polygonal shape.
Moreover, as a coating liquid of this invention, ink can be employ | adopted, for example, and the said ink can employ | adopt suitably water based, oiliness, dye type | system | group, and pigment type. Moreover, a rust preventive agent, a lubricant, etc. are employable. Rust preventives, lubricants and the like are preferably used in the present invention because petroleum solvents having a low surface tension are often used as the main solvent.

The first embodiment of the present invention is configured as described above, and the operation thereof will be described in detail.
First, the tubular main body 1 is fitted to the tip of the tube shaft 6 containing the coating liquid and, if necessary, the stirring sphere 9, and the applicator holder 7 is screwed to the tip of the tube shaft 6. The rear end of the body 8 is continued to the coating liquid outflow hole 32. Then, since the valve portion 21 is normally pressed against the valve seat portion 31 by the elastic force of the coil spring 4, supply of the application liquid to the application body 8 is prevented, but the application body 8 is applied to the application object 8. By the operation of pressing against the surface, the application body 8 swings and the valve stem 2 is pressed, the intermediate valve part 21 is separated from the valve seat part 31 and the application liquid outflow hole 32 is opened, and the application liquid is applied to the application body 8. Can supply. This configuration is the same as the valve of this type of conventional liquid applicator. Moreover, a cap may be provided as appropriate so as to cover the coated body 8.

By the way, in the first embodiment of the present invention, the plug body 5 is fitted on the cylindrical main body 1. The plug body 5 is designed to be detached from the cylindrical main body 1 when the application body 8 is first pressed against the application surface or the like. That is, when the applicator body 8 is pressed for the first time, the rear end of the applicator body 8 presses the valve stem front portion 22, and the rear end 23 of the valve stem 2 retracted thereby causes the inner bottom surface of the plug body 5. By press-contacting, the cylindrical main body 1 and the plug body 5 are unfitted and opened, and the plug body 5 is detached from the cylindrical main body 1 and accommodated in the tube shaft 6. The coating liquid flows into the cylindrical main body 11 from the coating liquid inflow hole 12 and is supplied to the application body 8 through the coating liquid outflow hole 32. After opening the plug 5, the configuration is the same as that of a conventional liquid applicator.
Thus, since the plug body 5 is opened by the force of pressing the application body 8, the strength of the airtight fitting between the plug body 5 and the cylindrical main body 1 is set taking into consideration the hardness of the application body 8. There is a need to. If the strength of the airtight fitting is too strong, the application body 8 may be crushed when the plug body 5 is opened. As the material of the application body 8, synthetic fiber materials such as acrylic fiber, polyester fiber, nylon fiber, felt material, plastic material and the like can be used as appropriate. What is necessary is just to set the intensity | strength of airtight fitting. The airtight fitting strength can be about 100 gf to 2 kgf.

The retraction distance of the valve stem 2 necessary for opening the plug body 5 may be a minimum distance necessary for releasing the airtight fitting between the plug body 5 and the cylindrical main body 1. If the valve body rear end 23 comes into contact with the bottom surface of the plug body and the plug body 5 is opened by pressing the application body 8, the valve body rear end 23 and the bottom surface of the plug body need not be in contact with each other from the beginning. .
Further, a projection 51 inserted through the coating liquid inflow hole 12 may be provided at the center of the inner bottom portion of the plug body 5. In this case, the valve rod rear end 23 is inserted into the coating liquid inflow hole 12 from the front, and the protrusion 51 is inserted from the rear. With such a configuration, the protrusion 51 compensates for the retreat distance of the valve stem 2 necessary for opening the plug body 5, so that it is not necessary to design the valve stem rear end 23 to be extremely long. The rear end 23 of the valve stem and the front end of the protrusion 51 may be in contact with each other from the beginning, or may be designed to contact with the retraction of the valve stem 2.

  Further, the relationship between the distance a from the front end of the plug body 5 to the rear end of the cylindrical main body 1 and the distance b at which the valve stem 2 moves backward is the same or the distance at which the valve stem 2 moves backward. When the length is longer, that is, when a ≦ b, the plug body 5 is surely detached from the cylindrical main body 1, which is more preferable.

  Since the valve device of the present invention has such a configuration, when the coating body 8 is pressed for the first time, the coating liquid is placed in the cylindrical main body 11 until the plug body 5 is opened by pressure contact with the valve rod rear end 23. Is not allowed to flow in, so that the secret of the coating solution inflow hole 12 is conventionally taken at one place (the valve portion 21 and the valve seat portion 31), and the plug body 5 is made airtight at another place. Therefore, there is no problem that the coating liquid leaks to the coated body 8 due to unexpected impact, pressure change, molding error, or the like.

Next, a second embodiment of the present invention will be described in detail with reference to FIG. Portions overlapping with the first embodiment are omitted.
In the second embodiment, an auxiliary coating liquid inflow hole 14 is provided separately from the coating liquid inflow hole 12 at the bottom of the cylindrical main body 1. The auxiliary coating liquid inflow holes 14 are disposed so as to surround the coating liquid inflow holes 12, and the number thereof is not limited. Further, the shape can be appropriately selected from a circle, an ellipse, a polygon, and the like.
Then, the plug body 5 is fitted on the bottom of the cylindrical main body 1 in which the coating liquid inflow hole 12 and the auxiliary coating liquid inflow hole 14 are disposed. The method of airtightly fitting the plug body 5 and the cylindrical main body 1 is as in the first embodiment. Thereby, no matter how many auxiliary coating liquid inflow holes 14 are provided at the bottom of the cylindrical main body 1, the coating liquid does not flow into the cylindrical main body 11.
Then, as described above, when the applicator body 8 is pressed for the first time, the rear end of the applicator body 8 presses the valve stem front portion 22, and the rear end 23 of the valve stem 2 retracted thereby is By press-contacting the inner bottom surface, the cylindrical main body 1 and the plug body 5 are unfitted and opened, and the coating liquid enters the cylindrical main body 11 from the coating liquid inflow hole 12 and the auxiliary coating liquid inflow hole 14. It flows into the coating body 8 through the coating liquid outflow hole 32.
As described above, by providing the auxiliary coating liquid inflow hole 14, the amount of the coating liquid flowing into the cylindrical main body 11 is fined while assisting the shortage of the coating liquid from the coating liquid inflow hole 12 alone. It is also possible to adjust.

Next, a third embodiment of the present invention will be described in detail with reference to FIG. Parts that overlap with the first and second embodiments are omitted.
In the third embodiment, an auxiliary coating liquid inflow hole 15 is provided in the intermediate body wall of the cylindrical main body 1, and the auxiliary coating liquid inflow hole 15 is also fitted by the plug body 5. There is no limit to the number of auxiliary coating liquid inflow holes 15 provided in the intermediate body wall, and the shape can be appropriately selected from circular, elliptical, polygonal, and the like.
Then, the plug body 5 is fitted over the cylindrical main body 1 so as to cover the coating liquid inflow hole 12 and the auxiliary coating liquid inflow hole 15 disposed in the intermediate body wall of the cylindrical main body 1. As a method for airtightly fitting the plug body 5 and the cylindrical main body 1, the configuration of the first embodiment can be appropriately adopted, but the fitting portion is positioned in front of the front end of the auxiliary coating liquid inflow hole 15. It becomes.
Then, as described above, when the applicator body 8 is pressed for the first time, the rear end of the applicator body 8 presses the valve stem front portion 22, and the rear end 23 of the valve stem 2 retracted thereby is By press-contacting the inner bottom surface, the tubular main body 1 and the plug body 5 are unfitted and opened, and the coating liquid enters the cylindrical main body 11 from the coating liquid inflow hole 12 and the auxiliary coating liquid inflow hole 15. It flows into the coating body 8 through the coating liquid outflow hole 32.
Of course, in addition to the auxiliary coating liquid inflow hole 15, the auxiliary coating liquid inflow hole 14 disposed at the bottom of the cylindrical main body may be used in combination.

  Here, in Example 3, since the airtight fitting portion is positioned in front of the front end of the auxiliary coating liquid inflow hole 15, the covering portion between the plug body 5 and the cylindrical main body 1 becomes large. It does not hinder the flow into the cylindrical main body 11. That is, if the airtight fitting part is released and the plug is opened by pressing the applicator 8 at the first time, the plug 5 is detached from the cylindrical main body 1 and free, and is naturally separated from the cylindrical main body 1. This is because it is accommodated in the tube shaft 6. For example, when the cylindrical main body 1 is tapered toward the rear end, the plug body 5 after opening is easily detached from the cylindrical main body 1, which is more convenient.

  Thus, by providing the auxiliary coating liquid inflow hole 15 in the intermediate body wall of the cylindrical main body 1, the amount of the coating liquid from the coating liquid inflow hole 12 alone is assisted, and the cylindrical main body 1 It is also possible to finely adjust the amount of the coating liquid flowing into the inside 11. As in Example 2, when the auxiliary coating liquid inflow hole 14 is provided at the bottom separately from the coating liquid inflow hole 12 at the bottom center, the amount of the coating liquid from the coating liquid inflow hole 12 is insufficient. The auxiliary coating liquid inflow hole 15 can be replenished. Further, when one end of the auxiliary coating liquid inflow hole 15 reaches the vicinity of the valve seat portion 31, almost all of the coating liquid in the tube shaft 6 can be sent out to the application body 8 side. And economical.

  Although the present invention has been described with reference to the above embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the scope of the present invention. It is.

Half sectional view of the liquid applicator of the first embodiment Half sectional view of the same liquid applicator with the plug removed Sectional view of the valve device of the same liquid applicator Sectional view before and after opening the valve device Perspective view after opening the valve device Perspective view of the plug of the liquid applicator Sectional drawing of the valve apparatus of the liquid applicator of 2nd Example Sectional drawing of the valve apparatus of the liquid applicator of 3rd Example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tubular main body 11 Inside cylindrical main body 12 Coating liquid inflow hole 13 Rear end outer peripheral surface 14 15 Auxiliary coating liquid inflow hole 2 Valve rod 21 Valve portion 22 Valve rod front portion 23 Valve rod rear end 3 Lid portion 31 Valve seat portion 32 Coating liquid outflow hole 4 Coil spring 5 Plug body 51 Protrusion 52 Inner peripheral surface 6 Pipe shaft 7 Coating body holder 8 Coating body 9 Stirring ball 10 Sealing material for airtightness

Claims (3)

A valve comprising a cylindrical main body provided with a coating liquid inflow hole in the center of the bottom and a coating liquid outflow hole in the lid, and a valve part corresponding to the valve seat formed at the base of the coating liquid outflow hole. An applicator holder comprising a rod and a coil spring which is surrounded by the valve rod and repels the valve portion toward the valve seat portion, and is fitted to the tip of the tube shaft and always follows the tip of the tube shaft The supply of the coating liquid to the application body inserted in the valve is blocked by the contact between the valve part and the valve seat part. At the time of application, the valve rod is pushed by the application pressure, and the valve part is separated from the valve seat part. A liquid applicator valve device that can supply the application liquid to the application body,
A plug body that is opened by pressure contact with the rear end of the valve rod at the time of first press of the application body is fitted on the bottom of the cylindrical main body so that airtightness in the cylindrical main body is maintained. Valve device for liquid applicator.   The valve device for a liquid applicator according to claim 1, wherein an auxiliary coating liquid inflow hole is provided separately from the coating liquid inflow hole at the bottom of the cylindrical main body.   The valve device for a liquid applicator according to claim 1 or 2, wherein the plug body covers an auxiliary coating liquid inflow hole disposed on an intermediate body wall of the cylindrical main body.

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