JP4495495B2 - Valve device for liquid applicator - Google Patents

Description

The present invention relates to a valve device used for a liquid applicator mainly using a pigment-based coating liquid.

Conventionally, this type of liquid applicator has a structure in which an application liquid is put into a container, and when the application body is pushed, the on-off valve opens and the application liquid oozes out from the container to the felt pen, sign pen, correction liquid application tool And so on. For example, Japanese Utility Model Publication No. 3-44099 (hereinafter referred to as (A)), Japanese Utility Model Publication No. 58-9784 (hereinafter referred to as (B)), Japanese Utility Model Publication No. 62-67784 (hereinafter referred to as (C)). ) Is disclosed. In any case, when the coating solution is separated into a solvent and a pigment, the coating solution is stirred again to disperse the coating solution into a uniform coating solution. (A) is a configuration in which a stirring sphere is accommodated in a coating solution storage container as a coating solution stirring device, and the liquid applicator is swung several times and redispersed before coating. (B) is a configuration in which a part of the liquid applicator is rotated so that the stirring blades interlock to redisperse the settled pigment. (C) When the application body is pushed, the on-off valve opens and the application liquid oozes out from the application liquid storage container to the application body, and the stirring blade in the tube shaft moves back and forth, so that the application liquid The pigment precipitated by stirring is redispersed and led out toward the coated body.
Reality 3-44099 (page 3, Fig. 4) Japanese Utility Model Publication No.58-9784 (1st page, Fig.2) Japanese Utility Model Publication No. 62-67784 (first page, Fig. 1)

However, (b), (b), and (c) are all configured to stir only the coating liquid in the tube shaft, so the coating liquid in the cylindrical main body slightly swings with the movement of the valve stem. However, it is not stirred enough to be redispersed. This problem occurs particularly when the liquid applicator is stored for a long time with the applicator facing downward. When this type of coating solution is stored for a long period of time, the pigment and the solvent are separated, and the so-called hard caking phenomenon occurs in which the separated pigment is stretched and solidified. If this hard caking phenomenon occurs when the coating body is stored downward, the valve stem may malfunction even when the coating body is pressed against the surface to be coated. This is because blocking of the coating liquid or clogging occurs between the valve stem and the inner wall surface of the cylindrical main body, which hinders clear application to the application target surface.

Even if the hard caking phenomenon does not occur, the coating liquid in the cylindrical main body is not redispersed because it does not include any stirring device. Therefore, when the application body is pressed against the surface to be applied, first, the coating liquid in the cylindrical main body that becomes the flow path of the application liquid is led out to the application liquid outflow hole. In this configuration, the pigment and the solvent are separated into the application body. It will be derived in the state. That is, at the time of the initial application using the coating liquid in the cylindrical main body, there has been a problem that a transparent liquid containing only the solvent is applied to the application target surface.

Therefore, the present invention has been made paying attention to the problems of the prior art, and even if the liquid applicator is stored for a long period of time and the coating liquid is separated and a hard caking phenomenon occurs, the valve stem does not operate properly. Another object of the present invention is to provide a valve device for a liquid applicator that does not cause a transparent liquid containing only a solvent to be applied to a surface to be applied even during initial application.

The present invention provides a cylindrical main body having a coating liquid inflow hole in the center of the rear end and a coating liquid outflow hole in the lid, and a valve portion corresponding to a valve seat formed at the base of the coating liquid outflow hole. And a coil spring that is surrounded by the valve stem and elastically urges the valve portion toward the valve seat portion, and is fitted to the tip of the tube shaft and is always at the tip of the tube shaft. The supply of the application liquid to the application body inserted in the application body holder following is blocked by the contact between the valve part and the valve seat part, but the application body is pressed against the application target surface during application of the application liquid. In the valve device of the liquid applicator, in which the valve stem is pushed by the valve and the valve portion is separated from the valve seat portion so that the application liquid can be supplied to the application body. When the applicator moves back and forth, the valve stem is screwed into the cylindrical main body. And the screw contact portion formed on the valve stem on for movement, a valve system for a liquid applicator, characterized in that a stirring blade onto the valve stem of the tubular in principal.

Since the liquid applicator of the present invention performs a spiral motion in which the valve stem spirally rotates backward with respect to the valve shaft direction, its shearing action is less than that of a conventional configuration that only slides backward. Increase significantly. For this reason, even when the so-called hard caking phenomenon occurs when the pigment is hardened by the curtain, the pigment causing the hard caking phenomenon is sheared by the operation of the valve stem, causing the conventional malfunction. Absent. In addition, when the valve stem performs a spiral motion that spirally pivots backward with respect to the valve axis direction, the coating liquid is stirred in a spiral shape together with the action of the stirring blade, and at the same time, the coating liquid flows out narrowly. Since it is led out to the part, the coating solution is subjected to a strong load and re-dispersed. Therefore, it is possible to prevent the occurrence of problems such as the application of a transparent liquid containing only a solvent to the application target surface during the initial application using the application liquid in the cylindrical main body. Further, when the valve stem is pushed back forward with respect to the valve shaft direction by the elastic force of the coil spring, the valve stem is rotated by the reverse rotation as previously described, and the tube shaft extends from the coating liquid inlet hole and the auxiliary coating liquid inlet hole. The coating liquid inside flows into the cylindrical main body spirally and is stirred by the stirring blade. As a result, not only the coating liquid flowing in from the tube shaft but also the pigment adhering to the back surface of the valve portion due to the separation of the coating liquid can be redispersed by the action of the coating liquid flowing in spirally. Further, the coating liquid in the tube shaft that has already been redispersed by the stirring ball or the like is also led out to the coating body while the dispersed state is maintained by the stirring action of the valve rod in the cylindrical main body serving as the flow path. Even if the user forgets to re-disperse the coating liquid in the tube shaft with the stirring sphere, the coating liquid is re-dispersed if not completely due to the stirring action of the valve stem in the cylindrical main body. It can be made to lead to an application body.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 3, 4, 5, 6, 6, 7 and 8. FIG.
The cylindrical main body 1 has a substantially cylindrical shape, and a coating liquid inflow hole 12 is provided at the center of the rear end portion, and an auxiliary coating liquid inflow hole 13 is provided surrounding the coating liquid inflow hole 12. A plug-like lid 3 is fitted into the opening of the cylindrical main body 1. 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. A screw contact portion 11 is formed on the inner wall surface of the cylindrical main body 1 around the valve shaft of the valve stem 2. The screw contact portion 11 is formed by a spiral groove having a spiral shape around the valve shaft of the valve stem 2.

The valve stem 2 includes a valve portion 21 corresponding to the valve seat portion 31 in the middle. The valve stem 2 includes a valve stem front portion 22 and a valve stem rear portion 23 which are both ends thereof, and the coating liquid outflow hole 32. The cylindrical main body 1 is incorporated so as to protrude outward from 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 valve axis direction. And this valve rod 2 always press-contacts the said valve part 21 to the valve-seat part 31 with the elastic force of the coil spring 4 enclosed by this. In addition, it is preferable to provide a locking portion such as a recess for locking the both ends of the coil spring 4 on the inner surface of the rear end portion of the cylindrical main body 1 and the back surface of the valve portion 21 opposite to the inner surface. In the embodiment, the valve portion 21 is umbrella-shaped.

A screwed portion 24 is formed at the rear end portion of the valve portion 21 so as to face the screwed portion 11. The to-be-threaded portion 24 is formed by a protrusion and has a shape that slides along the spiral groove of the threaded portion 11. The coating liquid outflow portion 14 is formed in the gap between the inner surface of the cylindrical main body and the rear end portion of the valve portion 21. The size of the coating liquid outflow portion 14 is not particularly limited as long as the replacement of the coating liquid and air is performed without delay.

Further, as shown in FIGS. 4, 5, and 6, a stirring blade 25 is formed on the back surface of the valve portion 21. The shape of the stirring blade 25 can be the same shape as the stirring blade of a stirrer generally used when stirring the coating liquid, such as a propeller type, a turbine type, and a saw tooth type. There are no particular restrictions on the number of stirring blades 25, the angle with respect to the valve shaft, or the like.

Here, a plastic made of synthetic resin can be used as the material of the cylindrical main body 1, the valve stem 2, and the lid portion 3. Moreover, the shape of the screwed part 24 corresponding to the screwed part 11 only needs to be in a slidable relationship, and the screwed part 24 is formed by a spiral groove, and the screwed part 11 is formed by the spiral groove. The structure formed by the protrusion which slides along may be sufficient. The spiral pitch may be any distance that allows the valve stem 2 to rotate, and the number of rotations is not particularly limited. Further, the positions of the screwed portion 11 and the screwed portion 24 are the valve rod rear portion 23 facing the outer peripheral surface of the valve rod front portion 22 facing the inner wall surface of the lid portion 3 or the inner wall surface of the coating liquid inflow hole 12. It may be formed on each of the outer peripheral surfaces.

The first embodiment of the present invention has the above structure, and the operation thereof will be described in detail. In the liquid applicator according to the first embodiment of the present invention, the cylindrical main body 1 is fitted to the tip of the tube shaft 5 in which the stirring sphere is built together with the coating solution, and the applicator holder 6 is attached to the tip of the tube shaft 5. If the base end of the application body 7 to which the screw is screwed is connected to the application liquid outflow hole 32, the valve portion 21 is always pressed against the valve seat portion 31 by the elastic force of the coil spring 4. Although the supply of the coating liquid to the application body 7 is blocked, the application body 7 is swung by the operation of pressing the application body 7 against the surface to be applied, the valve stem 2 is pressed, and the intermediate valve portion 21 is turned off. The coating liquid outflow hole 32 is opened away from the seat portion 31 and the coating liquid can be supplied to the coating body 7 as in the conventional valve of this type of liquid applicator.

However, in the present invention, the threaded contact portion 11 is formed around the valve shaft of the valve stem 2 on the inner wall surface of the cylindrical main body 1 and the threaded contact portion 24 is formed at the opposite position. During the operation in which the application body 7 at the front end portion is pressed against the surface to be applied, the valve rod 2 performs a so-called spiral motion that rotates together with the application body 7 in a spiral manner with respect to the valve shaft direction of the valve rod 2. Therefore, the valve stem 2 having the stirring blade 25 redisperses the pigment by the stirring blade 25 while stirring the coating liquid in the cylindrical main body 1 in a spiral shape. Thereafter, when the application body 7 is separated from the surface to be applied, the valve rod 2 is pushed back in the valve shaft direction by the elastic force of the coil spring. It returns to the pressure contact of 21 and the valve seat part 31. By rotating the valve stem 2 in the reverse rotation as described above, the coating liquid in the tube shaft 5 flows in a spiral shape into the cylindrical main body 1 from the coating liquid inflow hole 12 and the auxiliary coating liquid inflow hole 13. When this series of operations is continuously performed, the coating liquid in the cylindrical main body 1 is redispersed by the stirring blade 25 and the stirring rotation can be instantaneously changed to the reverse rotation, so that a larger load is applied. Further, if the interval between the coating liquid outflow portions 14 is narrow, the coating liquid outflow portion is narrow when the valve stem 2 performs a spiral motion that spirally rotates backward with respect to the valve shaft direction. 14 leads to a heavy load.

Here, a process in which the coating liquid in the cylindrical main body 1 is redispersed will be described. When the liquid applicator is stored for a long period of time, the coating liquid may be in a state where the pigment and the solvent are separated, and in severe cases, the separated pigment may be stretched and hardened, so-called hard caking phenomenon may occur. In the present invention, since the valve stem 2 performs a spiral motion that spirally rotates backward with respect to the valve axis direction, the shearing action is remarkably increased as compared with the conventional configuration in which the valve stem 2 only slides backward. . Therefore, even if a coating liquid curtain or clogging occurs between the valve stem 2 and the inner wall surface of the cylindrical main body 1, the valve stem 2 can be actuated by its shearing force. There is no fault.

After that, the valve rod 2 spirally rotates backward with respect to the valve axis direction, so that the coating liquid is stirred in a spiral shape together with the action of the stirring blade 25 and is narrow at the same time. Since it is led out to the coating liquid outflow portion 14, the coating liquid is subjected to a strong load and re-dispersed. Thereafter, when the valve stem 2 is pushed back forward with respect to the valve axial direction by the elastic force of the coil spring, the valve stem 2 is rotated by the reverse rotation as described above, and the coating liquid inlet hole 12 and the auxiliary coating liquid inlet hole 13 The coating liquid in the tube shaft 5 flows spirally into the cylindrical main body 1 and is stirred by the stirring blade 25. As a result, not only the coating liquid flowing from the tube shaft 5 but also the pigment adhering to the back surface of the valve portion 21 due to the hard caking phenomenon described above is redispersed by the action of the coating liquid flowing in a spiral shape. Furthermore, the coating liquid in the tube shaft 5 that has already been redispersed by a stirring ball or the like is also led out to the coating body while being dispersed by the stirring action of the valve stem 2 in the cylindrical main body 1 serving as a flow path. Is done. Even if the user forgets to re-disperse the coating solution in the tube shaft 5 with the stirring sphere, the coating solution is not perfect due to the stirring action of the valve stem 2 in the cylindrical main body 1. Can be redispersed and led to the coated body.

In addition, although this invention was demonstrated by the said 1st Example, this invention is not limited to these Examples.

The center longitudinal cross-sectional view which showed the state which the valve part of the valve apparatus which concerns on 1st Example contact | abutted to the valve seat part The center longitudinal cross-sectional view in which the valve rod of the valve apparatus which concerns on 1st Example showed the state in the middle of rotation The center longitudinal cross-sectional view which showed the state which the valve stem of the valve apparatus which concerns on 1st Example reached the rotation end point. The perspective view which showed the state which provided the propeller-type stirring blade in the valve stem of the valve apparatus which concerns on 1st Example. The perspective view which showed the state which provided the turbine type stirring blade in the valve rod of the valve apparatus which concerns on 1st Example. The perspective view which showed the state which provided the sawtooth-type stirring blade in the valve stem of the valve apparatus which concerns on 1st Example. Partially cutaway front view of a marking pen using the present invention Partially cutaway front view showing a state where an application body of a marking pen using the present invention is pressed against a surface to be applied

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical main body 11 Screw contact part 12 Coating liquid inflow hole 13 Auxiliary coating liquid inflow hole 14 Coating liquid outflow part 2 Valve rod 21 Valve part 22 Valve rod front part 23 Valve rod rear part 24 Screwed part 25 Stirring blade 3 Cover part 31 Valve seat part 32 Outflow hole for coating liquid 4 Coil spring 5 Pipe shaft 6 Coating body holder 7 Coating body

Claims (1)

A cylindrical main body having a coating liquid inflow hole in the center of the rear end and a coating liquid outflow hole in the lid, and a valve portion corresponding to the valve seat formed at the base of the coating liquid outflow hole are provided in the middle. And a coil spring that is surrounded by the valve stem and elastically urges the valve portion toward the valve seat portion, and is applied 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 holder is blocked by the contact between the valve part and the valve seat part, but when applying the coating liquid, the valve body is pressed by the application body being pressed against the application target surface. In a valve device for a liquid applicator that is pressed to allow the application liquid to be supplied to the application body away from the valve seat, the valve body of the valve body is formed around the valve shaft The valve stem spirally moves in the cylindrical main body when the applied screw part and the application body move back and forth. Sea urchin and the valve to be threaded contact portion formed on the rod, a valve system for a liquid applicator, characterized in that a stirring blade formed in the valve stem on the tubular in principal.

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